Battery Warning&Tips
Safety Precautions and End-of-Life Management
Safety Precautions
1. Water Exposure
- Never immerse cells in water. Store cells in a cool, dry environment when not in use.
2. Overcharging
- Do not overcharge cells, as this may cause overheating or fire. Hardware and software must implement **multiple overcharge fault protections** (refer to **Section 4.3** for minimum requirements).
3. Charging Control
- Set reasonable charging time limits to prevent overheating, thermal runaway, or fire. BMS design must account for charging management failures.
- If charging is improperly terminated, identify and resolve the root cause before reuse.
4. Over-Discharge
- Avoid over-discharge. Maintain cell voltage **above 2.8V** during normal use through regular recharging.
5. Temperature Management
- Do not use or store cells in high-temperature environments. Cell temperature **must not exceed 65°C** during operation (BMS must trigger shutdown if exceeded).
- Use only **Li-ion battery-specific chargers**.
6. Polarity & Short-Circuit Prevention
- Strictly follow labels to connect terminals. Reverse charging is prohibited.
- Never short-circuit terminals with metal objects. Avoid storing/transporting cells with metal items (e.g., necklaces, hairpins).
7. Physical Integrity
- Do not strike, throw, step on, bend, solder directly to, or pierce cells with sharp objects.
- Protect cells from mechanical stress (impact/collision) to prevent internal short circuits.
8. Environmental Hazards
- Avoid use in strong electrostatic/magnetic fields.
- Securely fasten cells and wiring to prevent friction-induced arcing.
- Do not use plastic for encapsulation or electrical connections.
9. Leakage & Abnormal Conditions
- If electrolyte contacts skin/eyes, rinse immediately with water and seek medical attention.
- If cells emit odor, overheat, discolour, deform, or behave abnormally, remove and discontinue use immediately.
10. Disassembly
- Do not disassemble without written manufacturer consent.
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End-of-Life Management
- Cells have a limited lifespan. Customers must establish a traceability system to monitor and record each cell’s **internal resistance** and **capacity** throughout its lifecycle (measurement methods agreed with EVE).
- Retirement Criteria:
- Cells must be retired if:
- Internal resistance exceeds **150% of initial value**.
- Capacity falls below **60% of nominal capacity**.
- Failure to comply voids all manufacturer quality guarantees and liability claims.
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Cell Compression Force Guidelines
During module assembly, compression force may be applied to align cells. Exceeding limits causes damage or leakage.
- Max Force: ≤10,000 N (instantaneous).
- Recommended Range: 3000–7000 N.
- **Test Conditions**:
- Compression Area: 173.7 mm × 204.6 mm
- Speed: 0.02 mm/s
- Direction: Y-axis
- SOC: 15%–40%
Warning: Compression force must never exceed 10,000 N.
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Safety First: Always adhere to manufacturer guidelines and prioritize protective measures during handling, operation, and end-of-life management.