Requirements for enterprise lithium battery warehouses go beyond simply maintaining low temperatures and dry conditions. For cylindrical cells, pouch cells, finished battery packs, and energy storage modules, warehouse management must also account for product status, state of charge (SOC), packaging integrity, zoning and segregation, fire safety measures, routine inspections, and the management of defective or anomalous units.
Crucially, requirements may vary based on chemical composition, model type, storage duration, and warehouse location. Enterprises should not simply apply a one-size-fits-all standard for temperature, humidity, or SOC; instead, they should base their protocols on product specifications, warehouse risk assessments, and local fire safety and management regulations.
Executive Summary: Lithium batteries in storage must be kept within the temperature and humidity ranges specified by the manufacturer, while avoiding high temperatures, direct sunlight, moisture, and mechanical damage. Batteries classified as "good," "pending assessment," and "anomalous" must be managed in separate zones; furthermore, systems for monitoring SOC and conducting inbound checks, routine inspections, and emergency responses must be established. Specific parameters for temperature, humidity, SOC, and fire safety measures should be determined based on battery type, quantity, storage location, and local regulations.
I. What product statuses must be distinguished in lithium battery warehouses?
Warehouse management must first distinguish between standard compliant batteries, products requiring verification of appearance or packaging, and batteries exhibiting issues such as swelling, leakage, deformation, abnormal heating, impact damage, or other safety anomalies. Batteries in different states should not simply be mixed together in the same inventory area.
Standard inventory management focuses on preventing external conditions from damaging compliant products, whereas the management of anomalous batteries focuses on rapid identification, isolation, and handling by trained personnel in accordance with corporate emergency procedures. In particular, batteries that have been returned by customers, damaged by drops, have compromised packaging, or are of unknown status must not be returned to the standard inventory area without prior inspection. **Inventory Status** | **Warehouse Management Priorities**
**Standard/Qualified Batteries** | Maintain packaging integrity; control storage environment; prevent short circuits, crushing, drops, moisture exposure, and high-temperature/direct sunlight exposure.
**Products Pending Assessment** | Designate a clear area separate from standard inventory; determine subsequent disposition only after inspection is complete.
**Defective or Damaged Batteries** | Do not mix with standard inventory; isolate according to facility emergency protocols; handle only by trained personnel.
*Staff inspecting battery packaging and sample conditions in the lithium battery warehouse receiving area.*
**II. What temperature and humidity levels should be maintained for lithium battery storage?**
There is no single, universal temperature and humidity standard applicable to all secondary lithium batteries. Permissible storage conditions for specific types—such as cylindrical ternary cells, lithium iron phosphate (LFP) cells, pouch polymer batteries, and complete battery packs—should be determined primarily based on the specifications provided for each model.
General principles for warehouse environmental management include avoiding prolonged exposure to high temperatures, direct sunlight, rain, standing water, and condensation, as well as preventing conditions that significantly exceed the product's specified temperature and humidity ranges. For long-term storage, requirements should distinguish between short-term and long-term conditions, and status re-evaluations should be scheduled in accordance with manufacturer guidelines.
**Recommendations for storage parameters:** Warehouse policies should not simply mandate a single, universal temperature or humidity value without product-specific validation. A more appropriate approach is to maintain records of "permissible storage temperature, permissible humidity, long-term storage conditions, and inspection intervals" for each product model, using the corresponding product specifications as the reference.
**III. What State of Charge (SOC) level should be maintained for lithium battery storage?**
It is inappropriate to set a single, nationwide SOC value for lithium battery storage without considering battery type, storage duration, and local regulatory requirements. Inventory management must comply with both the storage requirements outlined in product specifications and the safety regulations applicable to the warehouse's location.
For example, the Shenzhen local standard DB4403/T 508-2024 mandates an SOC of no more than 70% for lithium-ion batteries and products containing them within its scope of application. However, as this is a local standard for Shenzhen—and explicitly excludes scenarios such as lithium-ion battery energy storage systems and products that are under construction or already in operation—the "70%" figure cannot be adopted as a universal storage standard for all warehouses and products nationwide. For specific PKCELL battery cells or packs, requirements regarding SOC (State of Charge), storage temperature, and storage duration—as outlined in the corresponding model specifications—must be verified during formal warehousing.
IV. Why must normal and abnormal batteries be segregated?
The purpose of segregation is to prevent batteries with unknown status or existing damage from being stored alongside normal inventory, and to mitigate the risk of abnormalities affecting other batteries or nearby combustible materials. Segregation entails more than just physical separation; it also encompasses status labeling, personnel access controls, and handling procedures.
Enterprises can establish zones for normal inventory, items pending assessment, and segregated abnormal products based on product characteristics and risk assessments. Specific fire compartmentalization, aisles, racking, ventilation, and fire safety systems should be determined by fire safety professionals—considering battery quantity, energy capacity, building conditions, and local regulations—rather than relying solely on blog posts for warehouse layout.
V. What should be checked when receiving lithium batteries into storage?
The primary focus of incoming inspections is to detect obvious abnormalities before products enter the normal inventory area. For procurement and warehouse staff, it is important to document details regarding outer packaging, product appearance, terminal condition, inventory batches, and any transit damage.
Inspect outer cartons, pallets, and inner packaging for signs of significant crushing, damage, or moisture exposure;
Check cells or battery packs for bulging, deformation, leakage, corrosion, or other obvious abnormalities;
Verify that battery terminals and connectors are adequately protected to prevent accidental short circuits during transport and storage;
Record the model, batch, quantity, time of entry, and storage location to ensure traceability;
Products returned by customers or those involved in transit incidents should first undergo an assessment process rather than being immediately merged with stock of good-quality products.
VI. What items should be inspected during routine checks of lithium battery warehouses?
Routine inspections of lithium battery warehouses should go beyond merely recording room temperature. Effective inspections must cover inventory status, environmental conditions, packaging, signs of abnormalities, aisles, fire safety equipment, and record completeness, with inspection frequency determined by the warehouse's risk level. Inspection Item Key Areas of Observation
Storage Environment Check if temperature and humidity are within the permissible range for the stored products; check for direct sunlight, standing water, condensation, or abnormal heat sources.
Packaging and Stacking Check for deformed or damp outer cartons, tilted cargo, or obstructed aisles.
Product Anomalies Check for abnormal temperature rise, odors, deformation, leakage, smoke, or packaging irregularities.
Isolation Area Ensure clear management boundaries are maintained between items awaiting assessment/disposition and normal inventory.
Fire Safety & Emergency Facilities Ensure equipment remains functional in accordance with company policies and site requirements; ensure evacuation routes and fire access paths remain unobstructed.
Warehouse staff inspecting lithium battery packaging and storage conditions on racks.
VII. What should be done if bulging, leakage, abnormal heating, or smoke occurs?
Upon discovering a lithium-ion battery with significant anomalies, the product must not be used, charged, or shipped as normal inventory. The enterprise should immediately report, isolate, and control risks in accordance with established on-site emergency plans, while restricting access by untrained personnel.
For battery packs that are already heating up, smoking, or on fire, it is not recommended for general warehouse staff to attempt handling or disassembly based on personal experience. Personnel safety and site evacuation take precedence; specific handling should be carried out by trained emergency personnel following company plans and local fire safety regulations. If the fire spirals out of control or poses a risk to personnel, emergency services must be notified immediately, and the danger zone evacuated.
Safety Boundaries: Specific methods for transferring, cooling, extinguishing, and subsequently handling anomalous batteries depend on the battery's state, quantity, the facility, and existing fire suppression systems. Enterprises should formulate professional emergency plans in advance rather than deciding on procedures on the fly after an incident occurs.
VIII. Can different types of cells and battery packs share the same storage conditions?
It is not recommended to assume that all lithium batteries can use identical storage parameters. Differences may exist regarding packaging formats, terminal exposure, State of Charge (SOC) requirements, storage durations, and the identification of abnormal states among ternary cylindrical cells, lithium iron phosphate (LFP) cylindrical cells, polymer pouch cells, and complete battery packs. For high-capacity industrial battery packs and energy storage battery modules in particular, the energy content per unit, connector types, and system structures differ from those of individual cells; therefore, warehouse risk assessments cannot simply replicate the management protocols used for small cells.
To verify storage conditions for specific products, cross-reference temperature, storage duration, transportation requirements, and project documentation against quality/certification data and the relevant product specifications.
For high-capacity battery packs or energy storage products, verification must also account for the specific structural design and operational status of the system; standard warehousing rules for individual cells should not be applied indiscriminately.
IX. What information should be recorded when establishing a lithium battery warehousing system?
The value of a warehousing system lies in ensuring the traceability of every battery batch, rather than merely displaying safety reminders on the wall. Enterprises should establish appropriate records for warehousing operations—including intake, storage, inspections, handling of defective/abnormal items, and dispatch—based on their specific risk assessments.
Product type, model, batch number, and quantity;
Intake date, storage location, and inventory status;
Requirements for storage temperature, humidity, State of Charge (SOC), and duration;
Scheduled inspection times and any anomalies detected;
Records regarding the isolation, assessment, and subsequent handling of batteries pending evaluation or identified as abnormal;
Records of fire safety facilities, emergency supplies, and relevant training or drills.
X. Frequently Asked Questions
Is it sufficient to maintain a uniform storage temperature of approximately 25°C for lithium battery warehouses?
No; 25°C should not be adopted as a universal storage standard for all lithium batteries. Enterprises should verify permissible storage temperatures based on the specifications of the specific cells or packs and determine environmental control parameters by considering storage duration and local warehouse safety requirements.
Must lithium batteries be maintained at 50% SOC during long-term storage?
A 50% SOC should not be treated as a fixed requirement for all models. The storage SOC should be determined based on the battery chemistry, product specifications, storage duration, and applicable local warehousing regulations.
Can batteries showing signs of swelling (bloating) remain on the original shelving while awaiting disposal?
This is not recommended. Lithium-ion batteries that are bulging, leaking, overheating, or visibly damaged must be removed from standard inventory and handled in accordance with the company's established procedures for isolating defective items and emergency management; they must not be stored alongside standard products.
Do energy storage battery packs and 18650 cells have the same storage requirements?
Not exactly. While both require protection against high temperatures, moisture, short circuits, and mechanical damage, energy storage battery packs differ in terms of per-unit energy, interconnection structures, BMS (Battery Management System) configurations, and housing designs. Storage measures should be determined based on specific product specifications and site-specific risk assessments.
Determine storage conditions based on specific models rather than applying generic values.
If you need to establish storage requirements for specific cells or battery packs, please provide the product model, chemistry, packaging type, inventory quantity, estimated storage duration, and intended region of use. PKCELL can assist by verifying storage conditions and transportation data from the product specifications, as well as providing recommendations for isolating defective units at the product level. However, warehouse construction, fire safety facilities, and site-level emergency plans must still be confirmed by local fire authorities, safety officials, and professional designers based on the actual project.
Reference Standards:
GB/T 42729-2023 "Guidelines for the Safe Use of Lithium-ion Batteries and Battery Packs" — For understanding the fundamental principles of the safe use of lithium-ion batteries and battery packs.
DB4403/T 508-2024 "Safety Specifications for the Storage and Use of Lithium-ion Batteries by Production and Business Units" — Serves as a specific reference for lithium-ion battery storage management for enterprises in the Shenzhen area; the scope of application and geographical limitations should be verified.
XF 1131-2014 "General Rules for Fire Safety Management in Warehousing Facilities" — Serves as a fundamental reference for fire safety management in warehousing facilities. Enterprises must still conduct professional assessments based on local regulations, building conditions, and the requirements of fire safety authorities.
Guangdong public network security no. 468000