How to Specify a Cold Storage AGV Battery for Low-Temperature Duty

A cold storage AGV battery must deliver predictable energy, peak power, charging acceptance, and communication performance at the battery cell’s actual operating temperature. Ambient temperature alone cannot define the correct pack. Engineers must also specify cold-soak duration, temperature transitions, heater demand, payload, route profile, charging windows, enclosure protection, and BMS control limits.

These requirements matter because lithium-ion performance changes as temperature falls. Internal resistance rises, usable capacity decreases, and voltage drops more sharply under load. Charging also becomes more restrictive because graphite-based cells face a greater risk of lithium plating when charge current exceeds the cold cell’s acceptance capability.

A reliable specification therefore connects five systems:

• The AGV drive and control architecture
• The battery cells and mechanical pack
• The battery management system
• The heating and insulation system
• The charging dock and fleet schedule

Treating these elements as one operating system helps prevent undersized capacity, nuisance BMS trips, incomplete charging, condensation damage, and avoidable fleet downtime.

What Must a Cold Storage AGV Battery Withstand?

A cold storage AGV battery must withstand more than the lowest freezer temperature printed on a warehouse specification. The engineering profile should describe how long the vehicle remains cold, how often it enters warmer areas, what loads it carries, where it charges, and how quickly its temperature changes. These conditions determine the required cells, enclosure, heater, BMS settings, and validation tests.

Cold-Room Temperature Profile

Start with measured temperature data from every operating zone. Record the normal temperature, expected minimum, short-duration extremes, and the time the AGV remains in each zone.

The specification should distinguish between:

Battery temperature often lags behind air temperature because cells, enclosure materials, insulation, and payload create thermal mass. For that reason, the BMS should make protection decisions from cell and pack sensor data rather than a single warehouse temperature reading.

Freezer Duty Cycle

Separate continuous freezer operation from intermittent cold-room entry. These two profiles place different demands on an AGV battery.

A vehicle that remains inside a freezer for an entire shift may reach a stable low temperature. A vehicle that repeatedly crosses between cold and warm zones faces additional condensation, thermal expansion, and sensor-stability challenges.

Document the complete duty cycle:

• Travel time inside each temperature zone
• Idle time at pickup and drop-off points
• Time spent lifting, towing, or positioning loads
• Frequency and duration of charging stops
• Door crossings per shift
• Maintenance and parking conditions

The same battery may perform differently in two warehouses with the same minimum temperature because route, idle time, and charging behavior change its internal temperature.

Temperature Transition Risks

Cold equipment can collect moisture when it enters air with a dew point above the equipment’s surface temperature. ASHRAE defines condensation as water vapor changing into liquid on a surface at or below the surrounding air’s dew-point temperature.

This risk affects more than the battery enclosure. Moisture may reach:

• Charging contacts
• Signal connectors
• BMS circuit boards
• Cable entries
• Vehicle controllers
• Navigation sensors
• Motor-drive electronics

A vehicle leaving a −13°F (−25°C) freezer may remain below the warm room’s dew point for a considerable period. Repeated cold-to-warm transitions can therefore expose electronics to recurring condensation and freeze-thaw cycles.

The project team should evaluate three possible operating strategies:

1. Keep the AGV and charging process within the cold zone.
2. Use a controlled transition or acclimation area.
3. Design the complete vehicle for repeated condensation exposure.

An IP rating alone does not confirm resistance to internal condensation. IEC 60529 classifies enclosure protection against specified ingress conditions, while condensation depends on dew point, temperature gradients, sealing details, and trapped moisture.

Payload and Route Demands

The battery specification should include vehicle mass, maximum payload, acceleration, travel speed, floor condition, gradients, turning frequency, and lifting requirements.

Cold increases rolling resistance in some tires, lubricants, bearings, and mechanical components. The battery must therefore support measured or validated cold-duty current, not only a room-temperature estimate.

Record these electrical loads separately:

• Traction motors
• Steering actuators
• Lift or conveyor mechanisms
• Navigation computers
• Cameras, lidar, and sensors
• Wireless communications
• Safety controllers
• Battery heaters

This load map provides the foundation for capacity, current, fuse, connector, and charger sizing.

How Does Cold Change LiFePO4 Battery Performance?

Cold conditions slow electrochemical transport inside lithium-ion cells. As temperature falls, resistance and polarization increase, while usable discharge voltage and capacity decline. The practical effects include shorter runtime, deeper voltage sag, reduced peak-power capability, and stricter charging limits. The size of each change depends on the cell design, temperature, state of charge, current, and exposure time.

Rising Internal Resistance

Low temperature increases several components of cell resistance, including electrolyte, interphase, and charge-transfer resistance. The battery then loses more voltage internally when the AGV draws current.

This effect matters most during:

• Initial acceleration
• Ramp climbing
• Lift activation
• Direction changes
• High-payload movement
• Simultaneous traction and accessory demand

A pack that supports the AGV at 77°F (25°C) may trigger low-voltage protection after a cold soak, even when the displayed state of charge appears sufficient. The BMS, controller, and pack capacity must account for this cold-load voltage behavior.

Reduced Usable Capacity

Rated amp-hours usually come from controlled test conditions. A low-temperature LiFePO4 battery may deliver less usable energy because cold cells reach the lower voltage limit earlier under load.

DOE-supported battery research has shown that lithium-ion discharge capacity and voltage can fall substantially as temperatures move from room temperature toward extreme subzero conditions. The exact reduction remains cell-specific, so engineers should use supplier discharge curves or project testing rather than one universal derating percentage.

The specification should request capacity data at:

• The expected minimum cell temperature
• The project’s continuous discharge rate
• Representative peak-current pulses
• The required end-of-discharge voltage
• New and aged battery conditions

Voltage Sag Under Load

Voltage sag equals the difference between resting voltage and loaded voltage. Cold conditions usually make this difference larger because internal resistance rises.

For an AGV, excessive sag can cause:

• Motor-controller undervoltage alarms
• BMS discharge cutoff
• Reduced lift performance
• Navigation-computer resets
• Interrupted docking
• Unplanned vehicle recovery

The battery supplier should verify both continuous current and short peak-current capability at the specified minimum cell temperature. A room-temperature peak-current rating does not prove cold-duty performance.

Lithium Plating During Charging

Charging presents a different challenge from discharging. At low temperatures, lithium ions may reach the graphite surface faster than they can safely enter its structure. Metallic lithium can then form on the anode.

Research supported by NREL and the U.S. Department of Energy identifies lithium plating as a major limitation during high-rate charging of graphite-based lithium-ion cells. It can reduce available lithium, accelerate degradation, and contribute to internal safety risks.

The charging specification should therefore define:

• Minimum permitted cell temperature
• Maximum charge current by temperature
• Preheating threshold
• Required temperature uniformity
• Conditions for stopping the heater
• Conditions for authorizing full charging current

The BMS should never infer charging safety from ambient temperature alone.

Which Cell Chemistry Fits Cold-Storage AGVs?

The right chemistry depends on the project’s safety priorities, available battery space, required runtime, charging schedule, temperature range, and total operating profile. LiFePO4 often suits industrial AGVs that prioritize cycle stability and controlled thermal behavior. NMC can serve space- or weight-constrained vehicles, while LTO may support specialized high-power and fast-charge applications.

LiFePO4 Safety Profile

LiFePO4, also called LFP, remains a practical choice for many industrial AGVs because it combines useful power capability with a comparatively mild thermal-runaway response under certain abuse conditions.

Comparative testing published through the U.S. Department of Energy’s OSTI system found that LFP cells produced a less severe thermal-runaway response than several tested NMC chemistries under the study’s overcharge conditions. Battery-level safety still depends on cell quality, electrical protection, thermal design, enclosure construction, and system validation.

For a cold-storage fleet, LFP can support:

• Multi-shift operation
• Frequent partial charging
• High cycle counts
• Industrial pack formats
• Integrated heating
• Custom BMS communication

Low-temperature performance still depends on the selected LFP cell. The chemistry name does not replace temperature-specific cell data.

NMC Energy Density

NMC cells generally provide greater energy storage per unit of mass or volume than LFP cells. This characteristic can help compact AGVs with strict compartment or payload limits.

NMC may suit projects where:

• The battery bay has little free volume
• Vehicle weight directly affects payload
• Long runtime must fit within a compact chassis
• Cooling and protection systems can support the selected cell

The project team should assess cell behavior, pack-level safety, charge limits, and low-temperature validation together. Energy density should not serve as the only selection criterion.

LTO Charging Advantages

Lithium titanate, or LTO, replaces the conventional graphite anode with lithium titanate material. Research has identified LTO’s strong rate capability as a useful feature for high-power and fast-charging systems.

LTO may fit applications requiring:

• Frequent high-power charging
• Short charging windows
• High pulse-current capability
• Extensive cycling
• Specialized low-temperature operation

The chemistry normally requires more battery volume for the same stored energy than higher-energy lithium-ion options. Engineers should therefore compare LTO at the full vehicle-system level, including compartment size, weight, charger power, and project cost.

Chemistry Selection Matrix

No chemistry should receive approval from this matrix alone. Final selection requires temperature-dependent cell data, safety evidence, pack design review, and representative vehicle testing.

How Do You Size a Cold Storage AGV Battery?

Sizing a cold storage AGV battery requires more than converting daily energy into amp-hours. The calculation must account for traction and auxiliary loads, heater consumption, cold-temperature capacity loss, the usable state-of-charge window, conversion losses, aging allowance, peak current, reserve energy, and charging opportunities. The final pack should meet runtime and power targets under the coldest validated condition.

Calculate Average Power

Use measured operating data whenever possible. If measured data is unavailable during early design, estimate each load separately and update the calculation after prototype testing.

The basic equations are:

Power (kW) = Voltage (V) × Current (A) ÷ 1,000

Energy (kWh) = Average Power (kW) × Operating Time (hours)

Total daily energy should include:

Traction energy + lifting energy + controller energy + sensor energy + heater energy

For example, an AGV averaging 2.0 kW over eight operating hours uses approximately 16 kWh before heater demand and other design allowances.

Include Peak Current

Average energy determines runtime, but peak current determines whether the AGV can accelerate, lift, climb, and recover from demanding maneuvers without excessive voltage sag.

Record:

• Continuous current
• Five- to ten-second peaks
• Longer lift or ramp currents
• Regenerative current
• Simultaneous motor and accessory loads
• Current at minimum cell temperature

The battery’s cells, busbars, contactors, fuse, connectors, and cables must support the complete current profile.

A supplier should state peak-current duration and recovery requirements. A current value without an allowed time does not provide a complete engineering limit.

Apply Cold Derating

Use capacity and voltage curves from the proposed cell or completed pack. Apply the derating at the actual discharge current and minimum cell temperature.

A practical sizing formula is:

Required nominal energy = Daily load energy ÷ Usable SOC fraction ÷ Cold capacity factor

Then apply the agreed reserve and aging allowance.

Consider an illustrative AGV with:

• 16.0 kWh traction and auxiliary demand
• 0.5 kWh heater demand
• 80% usable SOC window
• 85% verified cold-capacity factor
• 15% engineering reserve

The starting nominal energy would be:

16.5 ÷ 0.80 ÷ 0.85 × 1.15 ≈ 27.9 kWh

This example only demonstrates the calculation. The 85% factor must come from the selected cell’s test data at the project temperature and load.

Set Reserve Capacity

Reserve energy should allow the AGV to complete its route, reach a safe stop, communicate with fleet control, and dock without reaching the BMS cutoff.

Reserve planning should consider:

• Route changes
• Heavier-than-normal payloads
• Charging-station congestion
• Heater consumption
• Battery aging
• Unexpected door delays
• Cold-start recovery
• Emergency repositioning

A fixed reserve percentage can support early planning, but fleet simulations and pilot data should confirm the final value.

Verify Shift Runtime

A calculated pack size still requires verification under a representative shift. The test should reproduce temperature, payload, speed, lift frequency, idle periods, charging events, and docking behavior.

Track:

• Starting and ending SOC
• Cell temperatures
• Pack voltage
• Minimum loaded voltage
• Heater energy
• Continuous and peak current
• Charging energy
• Alarm and derating events

The target is not simply to complete one shift. The battery should maintain the required reserve without repeatedly reaching protection limits.

What Charging Strategy Protects a Cold Storage AGV Battery?

A safe charging strategy should use measured cell temperature to control preheating, charging permission, current, and voltage. A cold storage AGV battery may charge inside the cold zone when its cells and thermal system support that method, or it may use a controlled warmer area. In either case, the charger and BMS must follow the validated temperature-dependent charging map.

Low-Temperature Charge Cutoff

The specification should state the lowest cell temperature at which charging may begin. It should also define whether the BMS blocks all current or permits a restricted cell-manufacturer-approved rate.

Avoid using one generic cutoff for every lithium-ion cell. The correct threshold depends on:

• Cell chemistry
• Anode design
• Electrolyte formulation
• State of charge
• Cell aging
• Charge current
• Manufacturer validation

The BMS should report the reason for a charging lockout so maintenance teams can distinguish low temperature from communication, voltage, or hardware faults.

Controlled Pack Preheating

A heating system raises cell temperature before the charger applies the normal current. The design should produce uniform heating rather than warming only the cells closest to the heater.

Specify:

• Heater power in watts
• Heater placement
• Insulation material and thickness
• Start temperature
• Charge-release temperature
• Maximum heater temperature
• Maximum cell-to-cell temperature difference
• Heating time after full cold soak
• Heater energy source

The heater may draw energy from the pack, charging dock, or a separate supply. That choice affects available runtime and dock design.

Opportunity Charging Windows

Opportunity charging uses short idle periods during loading, waiting, or route pauses. It can reduce the battery capacity needed to support a long operating day, but only when the charging windows deliver enough energy.

Estimate charging recovery with:

Recovered energy (kWh) = Charger power (kW) × Charging time (hours) × Efficiency

The design should also account for time spent:

• Aligning with the dock
• Establishing communication
• Checking temperature
• Preheating
• Ramping charge current
• Balancing cells near full SOC

A ten-minute stop does not equal ten minutes at full charger output.

Dock Current Limits

The charging dock should follow the current limit transmitted or authorized by the BMS. A fixed high-current output can conflict with a cold pack’s safe charging envelope.

Dock and pack requirements should cover:

• Maximum voltage
• Continuous charging current
• Current by cell temperature
• Connector temperature
• Contact resistance
• Misalignment detection
• Polarity protection
• Insulation monitoring where required
• Emergency disconnect
• Arc and spark control

OSHA requires designated battery-charging areas and precautions against open flames, sparks, and electric arcs where its powered-industrial-truck requirements apply. Project teams should confirm applicability with the vehicle classification and local authority.

Charger-BMS Communication Handshake

The battery, charger, and vehicle controller should agree on charging permission before significant current flows.

A typical communication sequence includes:

1. Dock detected
2. Charger identity confirmed
3. Pack voltage verified
4. Cell temperature checked
5. Heater activated if required
6. Charge-current limit transmitted
7. Contactor closed
8. Charging monitored
9. Current reduced or stopped on fault
10. Charge data stored

CAN or RS485 communication can transmit SOC, voltage, current, temperature, charge limits, alarms, and contactor status. The final message structure must match the vehicle and charger protocols.

Which BMS Functions Matter Most Below Freezing?

A low-temperature BMS must coordinate measurement, protection, heating, charging, and vehicle communication. It should detect the coldest cell area, apply temperature-dependent current limits, prevent unauthorized charging, estimate SOC under increased resistance, and provide clear fault data. These functions turn the battery’s approved temperature map into real-time operating decisions rather than relying on fixed room-temperature settings.

Multi-Point Temperature Sensing

One temperature sensor cannot show the complete pack condition. A cold enclosure may develop large temperature differences during preheating or charging.

Place sensors near:

• Expected cold spots
• Heater zones
• External enclosure surfaces
• High-current terminals
• Contactors
• Central cell groups
• Air gaps or poorly insulated areas

The BMS should use the coldest relevant cell temperature to authorize charging and the hottest temperature to prevent overheating.

Dynamic Current Derating

Dynamic derating reduces charge or discharge current as operating conditions approach an approved limit.

The control map may use:

• Minimum cell temperature
• Maximum cell temperature
• State of charge
• Cell voltage
• Pack voltage
• Connector temperature
• Current duration
• Fault history

Gradual derating can give the AGV controller time to adjust speed, acceleration, or lift demand before the BMS reaches a hard cutoff.

Heater Interlock Logic

The heater interlock should prevent normal charging until the cells reach the validated release temperature.

The logic must also detect:

• Failed temperature sensors
• Open heater circuits
• Shorted heater circuits
• Uneven heating
• Heating timeout
• Unexpected temperature rise
• Contactor faults
• Charger communication loss

The BMS should stop heating if the system cannot confirm safe operation.

SOC Estimation in Cold

Cold-related voltage sag can make SOC estimation more difficult, especially when the algorithm depends heavily on terminal voltage.

A stronger approach combines:

• Coulomb counting
• Temperature-compensated cell models
• Rested open-circuit voltage
• Current history
• Capacity learned from completed cycles
• Internal-resistance tracking

The dashboard should distinguish between stored charge and energy that is currently usable at low temperature. This distinction helps the fleet controller avoid assigning a route that the cold battery cannot complete.

CAN and RS485 Data

The battery should provide enough information for vehicle control, fleet scheduling, maintenance, and charger coordination.

Useful data points include:

The customer and battery supplier should agree on CAN IDs, scaling, update rates, fault priorities, and fail-safe behavior before prototype production.

Thermal and Enclosure Design for Condensation Control

Thermal and enclosure design should keep cells within their approved range while controlling moisture during cold-to-warm transitions. Insulation, seals, vents, cable entries, coatings, drainage, and pressure management must function as one system. A nominal IP rating helps classify ingress protection, but the project still needs separate dew-point and condensation tests for the actual AGV route.

Insulation and Heat Retention

Insulation reduces heat loss during preheating and limits the energy required to keep the cells above their charging threshold.

The design should avoid:

• Uninsulated metal bridges
• Large air gaps
• Direct heater contact with only one cell group
• Compressed insulation
• Moisture-absorbing materials
• Heat concentration near the BMS

Thermal simulation can support early design, but a full-pack cold-soak test should confirm heating time and cell-to-cell uniformity.

IP-Rated Pack Sealing

IEC 60529 defines the IP Code for classifying enclosure protection against access, solid foreign objects, and water under specified tests.

Select the enclosure rating according to actual exposure, which may include:

• Cleaning water
• Floor splash
• Meltwater
• Dust
• Ice
• Dripping from overhead equipment
• Accidental short-duration immersion

The final design should include qualified seals, controlled cable glands, protected connectors, and repeatable assembly procedures.

Pressure Equalization Vents

A sealed enclosure experiences pressure changes when temperature changes. A properly selected pressure equalization device can reduce stress on seals while limiting moisture and contaminant entry.

The specification should define:

• Temperature-change rate
• Enclosure volume
• Expected pressure differential
• Vent airflow
• Water resistance
• Installation orientation
• Cleaning exposure
• Replacement interval

The vent should remain outside direct splash paths and should not create an uncontrolled route toward the BMS or terminals.

Connector Moisture Protection

Charging and communication connectors often face direct exposure because they must remain accessible.

Design controls may include:

• Shrouded contacts
• Sealed backshells
• Downward-facing openings
• Drain paths
• Corrosion-resistant contact materials
• Connector heaters where justified
• Temperature sensing
• Contact-resistance monitoring
• Replaceable wear components

Docking contacts also need mechanical tolerance for frost, ice, vehicle positioning error, and repeated engagement.

Dew-Point Transition Testing

A condensation test should reproduce the coldest vehicle condition and the warmest expected air condition. Use the actual humidity or dew-point range from the facility.

A practical sequence may include:

1. Cold-soak the complete battery or AGV.
2. Move it into the defined warm and humid zone.
3. Monitor surface and internal temperatures.
4. Inspect for moisture at connectors and electronics.
5. Hold for the expected charging or maintenance period.
6. Return the unit to the cold zone.
7. Repeat for the required number of cycles.
8. Perform electrical and insulation checks.

The acceptance criteria should cover visible moisture, leakage current, communication errors, corrosion, connector resistance, and BMS operation.

Cold Storage AGV Battery Integration Requirements

A cold storage AGV battery must match the vehicle’s voltage range, current demand, battery bay, mass distribution, charger, communication protocol, and docking hardware. Replacing a pack based only on nominal voltage and amp-hours can create controller faults, insufficient peak power, unsafe charging, or mechanical interference. Integration should begin with an agreed electrical and mechanical interface document.

Voltage Window Matching

Match three voltage values:

• Nominal system voltage
• Maximum battery voltage at full charge
• Minimum permitted voltage under load

The controller, inverter, DC-DC converter, contactors, charger, and accessories must support the entire pack-voltage range.

Do not replace a 24V system with a 48V pack unless the AGV manufacturer has designed and approved the complete electrical conversion.

Peak Power Delivery

Peak power can be estimated with:

Power (kW) = Pack voltage under load × Current ÷ 1,000

Use loaded voltage rather than nominal voltage when checking cold-duty performance.

Verify the battery during:

• Full-payload acceleration
• Lift startup
• Ramp operation
• Tight turning
• Emergency braking recovery
• Low-SOC operation
• Minimum-temperature operation

The BMS peak-current limit must remain above the vehicle’s verified demand while preserving the cell and hardware limits.

Connector and Fuse Ratings

Connector and fuse selection should reflect continuous current, transient current, fault current, temperature, mating cycles, and environmental exposure.

The specification should list:

• Continuous-current rating
• Peak-current rating and duration
• Maximum contact resistance
• Touch protection
• Keying and polarity
• Precharge connection
• Auxiliary pins
• Service disconnect
• Fuse type and interrupt rating
• Cable size and temperature rating

The fuse protects against fault current. The BMS provides active control, but it does not replace properly coordinated physical overcurrent protection.

Pack Dimensions and Mounting

Provide a dimensional drawing of the battery bay, not only its external length, width, and height.

Include:

• Mounting-hole locations
• Rail or tray dimensions
• Connector clearance
• Service-removal path
• Cover-opening space
• Cable bend radius
• Vent clearance
• Maximum pack mass
• Center-of-gravity limits
• Shock and vibration loads

The pack should remain secured during acceleration, braking, docking impact, and material-handling operations.

Docking Contact Alignment

Automated charging depends on repeatable mechanical alignment. Temperature can change dimensions, seal stiffness, cable flexibility, and surface conditions.

Validate:

• Approach angle
• Vertical and horizontal tolerance
• Contact compression
• Engagement force
• Ice and frost exposure
• Contact wear
• Misalignment detection
• Vehicle stop position
• Current interruption before separation

The dock should not energize exposed contacts until the control system confirms proper engagement and safe charging conditions.

U.S. Safety Standards and Validation Plan

A U.S. project should separate AGV system safety, battery safety, transportation qualification, electrical installation, and workplace requirements. ANSI/ITSDF B56.5 addresses guided industrial vehicles, UL 3100 covers automated mobile platforms, IEC 62619 covers industrial lithium batteries, and UN 38.3 applies to transport testing. Compliance with one document does not automatically satisfy the others.

ANSI B56.5 Vehicle Safety

ANSI/ITSDF B56.5-2024 is the current edition of the U.S. safety standard for driverless automatic guided industrial vehicles and automated functions of manned industrial vehicles.

It addresses the design, operation, and maintenance of the vehicle and its system. The 2024 edition revised the previous 2019 version.

Use it to guide:

• Vehicle-system responsibilities
• Operating controls
• Maintenance requirements
• Training
• Automated functions
• System-level safety review

It should not be presented as a standalone battery certification.

UL 3100 AGV Scope

UL 3100 applies to automated mobile platforms used for functions such as lifting, carrying, picking, and towing. It covers system risks that include fire, electrical shock, moving parts, functional safety, object detection, payload integration, batteries, and BMS protection.

Discuss the target certification path early because the selected battery, charger, BMS, and vehicle architecture may affect the final system evaluation.

IEC 62619 Battery Evidence

IEC 62619:2022 specifies safety requirements and tests for secondary lithium cells and batteries used in industrial applications. Its stated motive applications include forklifts and automated guided vehicles.

A procurement package may request:

• Applicable cell and battery test reports
• Certification scope
• Model identification
• Pack configuration
• BMS details
• Test-laboratory information
• Evidence that the delivered design matches the tested design

Certification evidence should correspond to the actual battery configuration rather than a different voltage, cell, enclosure, or BMS.

UN 38.3 Transport Tests

UN Manual of Tests and Criteria, subsection 38.3, covers lithium-cell and battery testing for transport. The current Revision 8 includes updates to subsection 38.3.

The supplier should provide the appropriate test summary for the shipped battery model. UN 38.3 does not prove cold-storage runtime, charging performance, condensation resistance, or AGV-system safety.

NFPA 70 Charger Installation

Charging equipment and associated wiring should comply with the edition of NFPA 70, the National Electrical Code, adopted by the project’s jurisdiction, together with local amendments and authority-having-jurisdiction requirements.

U.S. adoption is not uniform. NFPA reported that multiple NEC editions remained in force across different states as of March 1, 2026.

Coordinate:

• Supply voltage and phase
• Branch-circuit capacity
• Disconnects
• Overcurrent protection
• Grounding and bonding
• Cable routing
• Equipment listing
• Environmental rating
• Emergency isolation
• Inspection access

Environmental Validation Matrix

The validation plan should state test conditions, sample count, measurement accuracy, acceptance criteria, and reporting format before testing begins.

MANLY Battery Configuration Path for Cold-Storage AGVs

MANLY Battery can translate the vehicle’s temperature profile, energy demand, peak current, battery bay, charger, and communication requirements into a custom cold storage AGV battery configuration. Its existing 24V and 48V robot battery platforms provide practical starting points, while project-specific heating, insulation, BMS logic, connectors, enclosure dimensions, and protocols can support cold-storage integration.

MANLY Battery Robot Platforms

As a robot battery manufacturer, MANLY Battery supplies LiFePO4 battery platforms for AGVs, delivery robots, cleaning robots, patrol robots, and other mobile industrial equipment.

Available robot battery products include 24V and 48V configurations. The final cold-storage design can adapt:

• Pack dimensions
• Capacity
• Continuous and peak current
• Enclosure construction
• Connector type
• BMS settings
• Communication protocol
• Heating and insulation
• Mounting points
• Charging interface

This approach allows the pack to match the AGV rather than forcing the vehicle around a fixed catalog enclosure.

24V and 48V Options

MANLY Battery’s verified robot battery range includes:

• 24V 100Ah LiFePO4 robot battery
• 48V 50Ah robot battery
• 48V 60Ah robot battery

These products provide reference voltage and capacity platforms for engineering discussion. MANLY Battery identifies the 24V 100Ah model for applications that include AGVs, delivery robots, cleaning robots, and patrol robots. The 48V 50Ah and 48V 60Ah products serve robot battery applications requiring a higher system voltage.

The selected platform must still match the vehicle’s full voltage window, current, runtime, thermal, mechanical, and communication requirements.

Cold-Storage Heating Configuration

A MANLY Battery cold-storage project can define a heating system around the actual cell and pack requirements.

The request should specify:

• Minimum ambient temperature
• Minimum expected cell temperature
• Charging location
• Available preheating time
• Target charge-release temperature
• Maximum permitted cell-temperature difference
• Heater supply source
• Required insulation
• Maximum heater energy per cycle

MANLY Battery can use these inputs to evaluate heater power, placement, insulation, temperature sensors, and BMS interlocks for the proposed pack.

Charging performance at a stated subzero temperature should receive approval only after the selected cells and complete thermal system pass the agreed validation program.

BMS and Protocol Customization

The BMS should match both the battery and AGV control architecture.

MANLY Battery can configure project requirements such as:

• Charge and discharge voltage limits
• Continuous and peak-current limits
• Low-temperature charge protection
• Heater control
• Multi-point temperature sensing
• CAN communication
• RS485 communication
• SOC and SOH reporting
• Fault codes
• Contactor control
• Charger authorization

The customer should provide an existing CAN database, protocol document, or signal list whenever available. Early protocol alignment reduces integration work during vehicle commissioning.

Pilot Validation Criteria

Before fleet production, test pilot batteries in the intended AGV or a representative engineering vehicle.

The approval plan should confirm:

• Full cold-soak startup
• Runtime at minimum temperature
• Peak-current performance
• Heater operation
• Low-temperature charging
• Opportunity-charging recovery
• Dock communication
• SOC accuracy
• Condensation resistance
• Temperature-sensor plausibility
• Fault handling
• Mechanical fit
• Route completion with reserve

A complete RFQ should include the AGV voltage, average and peak current, operating hours, payload, temperature profile, battery compartment drawing, charging schedule, dock specifications, communication protocol, and required standards.

MANLY Battery can use this information to develop an AGV battery around measurable operating conditions. The result is a specification that connects cell performance, thermal control, BMS logic, charging, and vehicle integration—four elements that determine whether a cold-storage fleet maintains predictable runtime and reliable automated operation.

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