A lithium ion battery

Abstract

The invention provides a lithium-ion battery, which includes a casing, a cover plate, an electrolyte and a pole core. The pole core leads to a first tab and a second pole tab; the pole core is connected with two short-circuit protection components, and the short-circuit protection components are It includes a conductive layer in the middle and insulating layers on both sides of the conductive layer; one end of the conductive layer of one short-circuit protection component is electrically connected to the first tab of the pole core, and one end of the conductive layer of the other short-circuit protection component is connected to the pole core. The second tab is electrically connected. The lithium-ion battery provided by the present invention can actively convert the complex short-circuit situation inside the battery into a large area between the positive and negative current collectors when the battery is abnormally deformed by an external force by setting a short-circuit protection component on the internal pole core of the battery. Short circuit minimizes the short-circuit heat inside the battery and shortens the heat conduction path. While slowing down the heat generation rate of the battery, it also increases the heat dissipation time of the battery and increases the safety and reliability of the battery under harsh conditions of use.

Description

technical field [0001] The invention belongs to the field of batteries, in particular to a lithium ion battery. Background technique [0002] In the context of the depletion of non-renewable resources such as petroleum and the increasingly serious environmental pollution, people place great expectations on new energy vehicles. The power battery is the heart of new energy vehicles, and has received more and more attention and favor. However, during the use of the battery, there are always various uncontrollable and extremely harsh use conditions that cause short circuits inside the battery and generate a lot of heat, which greatly reduces the safety and reliability of the battery. [0003] At present, in the existing technology, in order to prevent the internal short circuit of the battery, the battery is generally insulated and protected by using an insulating layer or insulating material, but this protection is relatively weak, and the battery becomes abnormal under abnorm...

AI Technical Summary

Problems solved by technology

[0004] shape, there will still be an internal short circuit

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