Lithium ion battery module

Abstract

The invention discloses a lithium ion battery module. The lithium ion battery module comprises an end part and an assembling unit; the assembling unit comprises a battery cell unit, a unit bracket, amiddle gasket and a battery cell bonding wire; the battery cell unit is arranged between the two unit brackets; a plurality of bracket through holes are formed in the positions, corresponding to the plurality of fixing grooves, of the unit brackets, so the end parts of the battery cell unit are exposed out of the unit brackets; a plurality of gasket through holes are formed in positions, corresponding to the bracket through holes, of the middle gasket, so the end parts of the battery cell units are exposed out of the middle gasket; the middle gasket is provided with an inner welding wire groove which is sunken towards the inside of the middle gasket at the edge of the bracket through hole, one end of a battery cell welding wire is welded to the end part of the battery cell unit, and the other end of the battery cell welding wire penetrates through the bracket through hole and the gasket through hole to be welded to the middle gasket and is positioned in the inner welding wire groove. The invention has the beneficial effect that the balance of the battery cell units is improved by improving the welding structure and the middle gasket.

Description

technical field [0001] The present application relates to a lithium-ion battery module, in particular, to a lithium-ion battery module. Background technique [0002] "Lithium battery" is a kind of battery that uses lithium metal or lithium alloy as negative electrode material and uses non-aqueous electrolyte solution. In 1912, the lithium metal battery was first proposed and studied by Gilbert N. Lewis. In the 1970s, M. S. Whittingham proposed and began to study lithium-ion batteries. Due to the very active chemical properties of lithium metal, the processing, storage and use of lithium metal have very high environmental requirements. With the development of science and technology, lithium batteries have now become the mainstream. [0003] With the further development of science and technology, lithium batteries have become a very important source of electrical energy in new energy vehicles and other fields. A single cell is often packaged as a lithium-ion battery modul...

AI Technical Summary

Problems solved by technology

[0004] In the relevant literature, the assembly of lithium-ion battery modules often has the disadvantages of inconvenient assembly and complicated electrical connections to the cells.

[0005] If a lithium-ion battery module described in the Chinese patent document CN208093630U uses an aluminum strip to electrically connect each parallel cell in a series unit, and then connects each series unit to form a series connection through an external electrical connection structure, but in this way The connection method will lead to an unbalanced condition of the cells connected in parallel in a series unit, which will cause some cells to deteriorate first, thereby affecting the life of the series unit, thereby reducing the utilization of those cells that are still in a better state

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