Sealing structure of power battery top cap and electrode

Abstract

The invention discloses a sealing structure of a power battery top cap and an electrode. The sealing structure comprises a top cap base plate, wherein two electrode holes which are respectively used for a positive electrode and a negative electrode to pass through are formed in the top cap base plate, the inner space of each electrode hole is greater than the positive electrode or the negative electrode, each electrode hole and the positive electrode or the negative electrode form an annular gap, a glass seal layer is arranged in each annular gap between each electrode hole and the positive electrode or the negative electrode, and the glass seal layer is integrally connected with the top cover base plate, the positive electrode and the negative electrode in a fusion manner. The sealing structure has the advantages of corrosion resistance, aging resistance, firmness in seal and stable sealing property.

Description

technical field [0001] The invention relates to battery accessories, in particular to a sealing structure for a top cover and an electrode of a power battery with corrosion resistance, aging resistance, firm sealing and stable sealing performance. Background technique [0002] The power battery is an important part of the new energy battery, and its biggest advantage is high energy and no pollution; it is the development direction of new energy vehicles and energy storage power stations, so the safety performance of the battery is particularly important, and the sealing of the top cover of the power battery is An important guarantee for battery safety. [0003] The sealing of the power battery is one of the important factors that affect the safety and durability of the battery. The leakage and leakage prevention of the top cover electrode of the power battery has always been a technical problem of the power battery. [0004] At this stage, plastic parts are mainly used for ...

AI Technical Summary

Problems solved by technology

[0005] 1. The plastic parts will be corroded if exposed to the electrolyte for a long time, and its sealing and aging resistance will be greatly reduced, resulting in the aging of the plastic parts and the failure of the seal, resulting in the leakage of the electrolyte inside the battery and causing the battery to fail;

[0006] 2. When the temperature of the working environment fluctuates greatly, the shrinkage of the plastic parts changes greatly, which greatly reduces the sealing effect;

[0007] 3. When the battery is in a violent vibration environment, the sealing effect of the plastic parts is reduced

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