Electrode lug serial connection structure for lithium battery pack

Abstract

The invention provides an electrode lug serial connection structure for a lithium battery pack. The electrode lug serial connection structure comprises a complex number of cells which are serially connected, wherein the cells are arranged in a same direction; anode lugs and cathode lugs of two adjacent cells form an electrode lug group in a serial connection manner; the anodes and the cathodes of two cells at an end part are power supply output ends; serial connection brackets are arranged at electrode lug ends of the cells; serial connection cavities which are arranged longitudinally are formed in the serial connection brackets corresponding to electrode lug groups; each electrode lug group penetrates through electrode lug holes formed in two sides of the inner bottom of a corresponding serial connection cavity, is bent and folded and is connected with a tabletting mechanism arranged on each serial connection cavity; detection studs are arranged on the tabletting mechanisms; connection platforms are arranged at the upper ends of the detection studs and are electrically connected with detection protection plates through screws; threads are formed in the lower ends of the detection studs and are fixed with the tabletting mechanism and the serial connection cavities; and the detection studs are arranged on two sides of the serial connection cavities. The electrode lug serial connection structure has the beneficial effects that the design is simple in structure, convenient to assemble and low in use cost and has the advantage that the use security of the lithium battery pack is improved.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a tab series connection structure of a lithium ion battery pack. Background technique [0002] In recent years, lithium-ion battery packs have been used more and more widely, especially in the field of power sources such as electric vehicles. Lithium-ion battery packs are usually composed of multiple cells connected in series. In the traditional assembly process, the positive and negative tabs of the battery are electrically connected by soldering. Because the soldering process is labor-intensive, the production cost is high, and there are prone to defects such as false soldering, which affect the yield rate. Soldering lithium-ion battery packs in series is also not conducive to repair work. In view of the frequent burning of the battery, it was previously believed that it was caused by the internal short circuit of the battery, the failure of the detection protec...

AI Technical Summary

Problems solved by technology

In the traditional assembly process, the positive and negative tabs of the battery are electrically connected by soldering. Because the soldering process is labor-intensive, the production cost is high, and there are prone to defects such as false soldering, which affect the yield rate. Soldering lithium-ion battery packs in series is also not conducive to rework work

In view of the frequent burning of the battery, it was previously believed that it was caused by the internal short circuit of the battery, the failure of the detection protection board, and the short circuit of the signal line. The main reason for the battery burning is that the electrolyte will flow to the metal plate after the leakage, which will react and corrode the hardware plate, resulting in high temperature, which will cause the solder of the pad to melt, and eventually the battery will short-circuit and cause combustion

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