Lithium ion battery end cover

Abstract

The invention discloses a lithium ion battery end cover. The lithium ion battery end cover is characterized by comprising a cover body, a positive guide pin and a negative guide pin, wherein the positive guide pin and the negative guide pin run through the cover body, one section, in the cover body, of each guide pin is provided with a guide pin holder which is used for preventing the guide pin from being separated from the cover body, and the cover body is formed by thermoplastic resin, which can resist the high temperature of 90,DEG C, in an injection molding manner. The lithium ion battery end cover is simple in structure, the guide pins are integrally injected into the cover body, and the end cover is integrally formed in a seamless manner, so that the liquid leakage of a battery can be effectively prevented; the guide pins cannot be separated from the cover body through the guide pin holders which are integrated with the guide pins, and the bottom area of the guide pin holders is large, so that the welding area is increased, the guide pins are unlikely to drop, the contact area is also increased, the impedance is reduced, and the heating during large-current discharging can be avoided.

Description

technical field [0001] The invention relates to a battery, in particular to a lithium ion battery, in particular to a lithium ion battery end cover. Background technique [0002] A lithium-ion battery is a rechargeable battery that primarily relies on the movement of lithium ions between the positive and negative electrodes to function. Lithium-ion battery refers to the general term for batteries with lithium-ion intercalation compounds as positive electrode materials. A battery that generally uses a material containing lithium as an electrode is a representative of a modern high-performance battery. Lithium-ion batteries use carbon materials as the negative electrode and lithium-containing compounds as the positive electrode. There is no metallic lithium, only lithium ions. This is the lithium-ion battery. [0003] Lithium-ion batteries are composed of three parts: positive electrode, negative electrode and electrolyte. The electrolyte is the electrolyte solution, and th...

AI Technical Summary

Problems solved by technology

Although it is very convenient to connect in series and parallel during use, the contact surface between the rubber plug and the guide pin (the aluminum stem of the guide pin) is prone to battery leakage due to poor sealing

However, because the connecting part of the guide pin (the pin tail of the guide pin is flattened) is relatively narrow, it can only be connected to the battery core by riveting. 90°C, it will also cause the rubber plug to deform and cause cracks to cause fatal defects such as battery leakage.

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