Lithium ion battery pack convergence board

Abstract

The invention belongs to the technical field of an electric automobile lithium ion battery pack and specifically relates to a lithium ion battery pack convergence board. The lithium ion battery pack convergence board comprises a convergence board body, a plurality of welding through holes arranged on the convergence board body, and a plurality of convergence sheets. The convergence sheets and the welding through holes are not located on the same plane. The convergence sheets and the welding through holes are same in number, shape and axle center. A plurality of connecting parts are arranged at peripheries of the convergence sheets equidistantly. The connecting parts and the welding through holes are connected. The lithium ion battery pack convergence board provided by the invention is low in cost, low in density, low in cost and firm in welding, has suitable resistivity and is easy to process.

Description

Technical field [0001] The invention belongs to the technical field of lithium battery packs for electric vehicles, and specifically relates to a lithium battery pack busbar. Background technique [0002] In order to solve the problem of exhaust pollution and resource consumption of existing vehicles, the automotive field is developing a new energy vehicle that uses electrical energy to provide power. Compared with lead-acid batteries, lithium batteries have high working voltage, high energy density, and long service life. Energy saving and environmental protection, low self-discharge rate, no memory effect and other significant advantages, so lithium batteries have become the first choice for new energy vehicles to provide electrical energy. However, after years of development, the low energy density and high price of batteries have become the bottleneck for the development of new energy vehicles. So that new energy vehicles can not completely replace traditional fuel vehicles. ...

AI Technical Summary

Problems solved by technology

[0002] In order to solve the problem of existing vehicle exhaust pollution and resource consumption, the automotive field is developing a new energy vehicle that uses electric energy to provide power. Compared with lead-acid batteries, lithium batteries have high operating voltage, high energy density, and long service life. Energy saving and environmental protection, low self-discharge rate, no memory effect and other significant advantages, so lithium batteries have become the first choice for new energy vehicles to provide electric energy. However, after years of development, the low energy density and high price of batteries have become the bottleneck for the development of new energy vehicles. New energy vehicles cannot completely replace traditional fuel vehicles

In order to solve this problem, technicians use manifolds to form electric vehicle (EV) battery systems. This method of making battery packs has the following problems that cannot be ignored: First, most of the industry currently uses nickel sheets and copper sheets to be composited or welded. The resistivity of the copper plate is low, the resistivity of the nickel plate is high, and the processing cost of the copper plate and the nickel plate is relatively high, so the copper plate and the nickel plate are not suitable as the manifold for parallel battery packs; secondly, in the welding process, the manifold will be Deformation will affect the welding effect. Finally, the parallel connection method of the manifold used in the traditional lithium battery pack will affect the operation of the entire battery pack when a single cell fails.

[0005] According to the problems existing in the prior art, the present invention provides a low-cost, suitable resistivity, light density, low cost, easy to process and reliable welding manifold, and the lithium battery pack manifold and lithium battery provided by the present invention The group parallel method can solve the problem that the damage of a single cell will not affect the lithium battery pack

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