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; a short-circuit protection component is connected to the pole core, and the short-circuit protection component is three Layer structure, including a conductive layer in the middle and insulating layers on both sides of the conductive layer; one end of the conductive layer is electrically connected to the first lug of the pole core, and the other end is a free end; the outermost collector of the pole core is the second The current collector where the dipole lug is located. 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 prior art, in order to prevent the internal short circuit of the battery, an insulating layer or insulating material is generally used to insulate and protect the battery, but this protection is relatively weak, and the internal short circuit will still occur when the ba...

AI Technical Summary

Problems solved by technology

However, during the use of the battery, there are always various uncontrollable and extremely harsh conditions that cause a short circuit 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 internal short circuit will still occur when the battery is deformed under abnormal external force

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