How to check the safety of the battery box

Is there any deformation, cracks, or dents in the outer shell? Damage may result in exposure of the internal battery or water ingress and short circuit.

Whether there are burn marks or discoloration on the surface, indicating that overheating or short circuit has occurred.

Whether the sealing components are aging or falling off, especially the waterproof performance of outdoor/car battery boxes needs to be checked.

Whether the input/output interface is loose, deformed, or the contact piece is oxidized.

Whether the exposed cables are damaged or the insulation layer is cracked.

Are the wiring terminals securely fastened without looseness? Loose connections may result in poor contact after vibration and spark generation.

Inspection method: Gently touch the surface of the battery box with the back of your hand to feel the overall and local temperature.

Judgment criteria:
Normal: close to the ambient temperature without obvious overheating;

Abnormal: Local obvious overheating may be caused by internal battery short circuit, poor contact at connection points, or overcharging.

Key inspection points:
Are the heat dissipation holes/fins blocked? Blockage can cause heat accumulation, accelerate battery aging or thermal runaway.

Check if the fan is running normally (by listening to the sound), and if there is no fan, confirm if the cooling channel is unobstructed.

1. Internal wiring (applicable to battery boxes with partially detachable or transparent casings):
Is there any entanglement, compression, or aging of the circuit.

Is there oxidation or rust on the wire joints? Oxidation can cause poor conductivity and local overheating.

2. Fixed and vibration protection
Is the battery box securely installed as a whole? Loose connections can cause internal components to vibrate and detach.

Is there any fixed device failure in the internal battery module? Battery shaking may cause the terminal ears to break or short circuit.

Fuse/circuit breaker: Whether it is intact. If it frequently melts/trips, it indicates an internal overcurrent fault.

Temperature control switch/thermal protector: Some battery boxes have built-in temperature sensors. If the over temperature protection cannot be reset after triggering, it may be due to damage to the core components.

Attempt to charge/discharge normally and observe for sudden power outages or abnormal flashing of indicator lights. Functional abnormalities may be due to internal control board malfunctions.

If there is a battery level display, observe whether the battery level jumps too quickly, indicating poor battery consistency or individual damage.