A patch type protection board and a battery pack equipped with the protection board

Abstract

The invention discloses a patch-type protective plate and a battery pack equipped with the protective plate. The patch-type protective plate includes a protective plate base material and a plurality of patch nickel strips arranged on the upper side of the protective plate base material, and the protective plate base material Holes are provided on the opposite side of the welding part, and several nickel bricks are provided on the lower side of the base material of the protective plate near the edge. The battery pack is connected to the cylindrical battery by spot welding on the patch nickel strip on the patch type protective plate. The top electrode of each cylindrical battery is connected to the protective plate through the nickel strip and connected to the nickel brick on the bottom side of the protective plate by spot welding. The board substrate is provided with an internal circuit for connecting patch nickel strips and nickel bricks to connect each cylindrical battery in series. The invention simplifies the battery production process, combines multi-station spot welding, reduces the number of spot welding, greatly reduces the defect rate of spot welding, has simple production operation, stronger structural stability, and greatly improves battery production efficiency. Automated production can also be realized to ensure high-efficiency, high-quality, and low-cost delivery of products.

Description

technical field [0001] The invention is used in the field of production and manufacture of battery packs, and in particular relates to a patch-type protective plate and a battery pack equipped with the protective plate. Background technique [0002] At present, the protective plates of four-string cylindrical lithium-ion battery packs mostly use nickel-bonded bricks and nickel strips on the batteries to be welded to realize the multi-string combination of batteries. Multiple nickel bricks are set on the protective plate, and each nickel brick is on the nickel strip at a point. During the welding process, due to the difference in spot welding position and height, three spot welding machines are required to be divided into three different stations to complete the spot welding. Among them, nickel strips will be repeatedly stacked and spot welded on the battery, although the cost of nickel strips is relatively high. Low, but there are many and scattered stations, which have the ...

AI Technical Summary

Problems solved by technology

[0002] At present, the protective plates of four-string cylindrical lithium-ion battery packs mostly use nickel-bonded bricks and nickel strips on the batteries to be welded to realize the multi-string combination of batteries. Multiple nickel bricks are set on the protective plate, and each nickel brick is on the nickel strip at a point. During the welding process, due to the difference in spot welding position and height, three spot welding machines are required to be divided into three different stations to complete the spot welding. Among them, nickel strips will be repeatedly stacked and spot welded on the battery, although the cost of nickel strips is relatively high. Low, but there are many and scattered stations, which have the defects of high quality risk and low production efficiency. Some manufacturers use special nickel strips in order to avoid stacking spot welding of nickel strips. Due to the large punching area of ​​special nickel strips, the cost is expensive. In terms of price lost competitive advantage

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