Lithium-ion battery module

Abstract

The application discloses a lithium-ion battery module, comprising: an end part and an assembly unit; the assembly unit includes: a cell unit, a cell support, an intermediate gasket and a cell welding wire; the cell unit is arranged between the two cell supports During the time, the unit bracket is provided with a number of bracket through holes at the positions corresponding to a number of fixing slots so that the end of the cell unit is exposed to the unit bracket; The end of the unit exposes the middle gasket, and the middle gasket is provided with an inner welding wire groove recessed to the inside of the middle gasket at the edge of the through hole of the bracket, and one end of the electric core welding wire is welded to the end of the electric core unit. The other end is soldered to the intermediate spacer through the bracket through hole and the spacer through hole and is located in the inner welding wire groove. The benefit of the present application is to provide a lithium-ion battery module that improves the balance of battery cells by improving the welding structure and the intermediate spacer.

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 module,...

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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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