When purchasing lithium batteries, it is necessary to consider various factors such as safety, performance, compliance and supplier qualifications to ensure that the purchase of safe and reliable products meets the demand. The following are detailed precautions:
1. Security and certification
Ensure that the battery is certified by international safety standards such as UN38.3 (essential for air transport), IEC 62133, UL 1642 (cell safety), CE (EU Market Access), RoHS (Restriction of Hazardous Substances), etc. Special application scenarios (such as medical, aerospace) require additional compliance with industry-specific standards (such as UL 2054, ISO 12405, etc.).
Transport compliance Lithium batteries are dangerous goods and must be transported in accordance with IATA DGR (aviation) or IMDG Code (Sea) regulations, MSDS (Material Safety Data Sheet), UN specification labels and other documents.
Choose a flame-retardant electrolyte and a battery equipped with a protective circuit (BMS) to avoid the risk of short circuit, overcharge and overdischarge. Do not remove or modify the battery to prevent internal short circuit from causing thermal runaway.
2, performance and parameter matching
Core Parameter Verification Capacity (Ah) : Select an appropriate capacity based on device requirements to avoid false labels (third-party verification is available). Voltage (V) : Confirm that the single cell voltage (e.g. 3.7V ternary lithium, 3.2V lithium iron phosphate) matches the device. Internal resistance (mΩ) : The low internal resistance battery has less heat and high efficiency, and is suitable for high-rate discharge scenarios (such as drones). Cycle life Ordinary lithium battery cycles of about 500-1000 times, lithium iron phosphate can reach more than 2000 times, according to the frequency of use to choose a long cycle battery. Temperature adaptability In high temperature environments (such as outdoor energy storage), high temperature resistant batteries (working temperature -20℃~60℃) are preferred. In low-temperature scenarios, pay attention to the discharge performance.
3. Supplier qualification and evaluation
Manufacturers with ISO 9001/14001 certification are preferred to investigate their production scale, technology patents and industry reputation. Be wary of small workshop products, there may be problems such as unknown cell source and substandard process. Sample testing requires free samples to be tested in actual scenarios, including charge and discharge efficiency, consistency (multi-series parallel stability), aging test, etc. After-sales protection Specifies warranty terms (such as capacity decay standards), failure response times, and return and exchange policies.
4. Application scenario adaptation
Battery type choice ternary lithium battery: high energy density, suitable for consumer electronics, electric vehicles. Lithium iron phosphate battery: high safety, long life, suitable for energy storage systems, power tools. Lithium titanate battery: ultra-low temperature performance (-30℃), suitable for extreme environment equipment. Protection Design Multi-string battery packs are equipped with a BMS (Battery Management System) to monitor voltage, temperature, and balance management in real time. High-power devices need to be equipped with dedicated charging modules (such as CC/CV charging curves).
5. Transport and storage specifications
Packaging must be shock-proof, short-circuit proof original packaging, do not mix with metal items. The battery must be kept below 30% charge during transport (required by some airlines). Storage conditions Long-term storage should be kept in a dry and cool environment (temperature 15-25 ° C, humidity < 60%), and periodically (every 3 months) charge and discharge maintenance.
6. Additional precautions
Anti-counterfeiting verification: Check the battery serial number through the official website or QR code to avoid buying refurbished or counterfeit products. Document integrity: Request specifications, test reports, certificates of origin and other documents. Through the above steps, procurement risks can be systematically avoided to ensure the safety and applicability of lithium batteries. It is recommended to fully communicate technical details with suppliers before purchasing, and sign clear contract terms to protect rights and interests.
