Power lithium ion battery cover plate single terminal post eduction negative end plate square structure

Abstract

The invention discloses a power lithium ion battery cover plate single terminal post eduction negative end plate square structure. The structure comprises a single-hole square end plate and a negativeterminal post structure, the single-hole square end plate covers the a cover plate, the single-hole square end plate is equipped with an end plate terminal post through-hole, the cover plate is equipped with a cover plate terminal post through-hole, the negative terminal post structure passes through the cover plate terminal post through-hole on the cover plate and the end plate terminal post through-hole on the single-hole square end plate in order, a pneumatic riveting machine is employed to rivet the negative terminal post structure with the single-hole square end plate and the cover platefrom the upper end, and the negative terminal post structure comprises an upper platform structure and a flat platform structure. The power lithium ion battery cover plate single terminal post eduction negative end plate square structure provided by the invention has the advantages of no need for laser welding, small structure difficulty, low cost, and good sealing performance; the negative terminal post structure only has two parts, so that the machining process becomes simple, assembling structure components are few, the cost is low, the machining process has no loss and small internal resistance, and the contact area of battery assembly is large, therefore the structure is suitable for heavy current charging and discharging. Also the structure is equipped with anti-rotation slots to prevent terminal post rotation.

Description

technical field [0001] The invention relates to a square structure of a negative terminal plate drawn from a single pole column of a cover plate of a power lithium ion battery, and belongs to the technical field of environmental protection. Background technique [0002] With the application of capacity-type and power-type lithium-ion batteries, the lead-out tabs of the room-shaped housing can no longer meet the needs of high-current discharge of lithium-ion batteries. The pole-type has begun to replace the tab-lead-out design. The existing poles The lead-out methods are as follows: the first one is connected by a nut snap ring. During the manufacture and use of the pole-type lithium-ion battery, due to repeated twisting of the nut, it is easy to cause the pole to loosen and affect the sealing effect of the battery. The tabs on the pole piece and the pole piece are broken, which shortens the battery life or short-circuits the battery internally; the second type uses the pole ...

AI Technical Summary

Problems solved by technology

The bracket and the pole are locked to each other. Although this structure can effectively prevent the pole from rotating, the structure is divided into upper, middle and lower parts. The manufacturing process is relatively complicated, which not only increases the difficulty of the process, but also increases the cost of the process. Due to the small diameter of the lower part, the contact area of ​​the battery assembly is also small, which is not suitable for high current charging and discharging

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