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5、 Insufficient negative capacity

When the capacity of the negative electrode opposite the positive electrode is insufficient, or there is no capacity at all, some or all of the lithium present during charging cannot be inserted into the interlayer structure of the negative electrode graphite. It will precipitate on the surface of the negative electrode, forming a protrusion like "dendrite". In the next charging, this protrusion is more likely to cause lithium precipitation. After dozens to hundreds of cycles of charging and discharging, the "dendrite" will grow and eventually pierce the diaphragm paper, Cause an internal short circuit.

The above are all the reasons that can cause the explosion of lithium-ion battery packs. There are many factors that affect the safety issues of lithium-ion batteries. We cannot kill a group of people with one blow, but we should consider multiple factors to minimize the external factors that cause lithium-ion battery problems. We hope that relevant companies can improve their technical and testing capabilities. Users should also pay attention during use.

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