Modular lithium battery module unit

Abstract

The invention discloses a modular lithium battery module unit. The modular lithium battery module unit comprises battery cell units, brackets and a terminal assembly; fixing grooves are formed in thebrackets; the end parts of the battery cell units are embedded into the fixing grooves; the fixing grooves include first-class grooves and second-class grooves; the first-class grooves are formed in one side of each bracket; the second type grooves are formed in the other sides of the brackets; the first-class grooves are opposite to the second-class grooves; through holes are formed in the portions, between the first-class grooves and the second-class grooves, of the brackets respectively; the terminal assembly comprises first terminal parts, second terminal parts, and third terminal parts; the first terminal parts contact with the battery cell units of the modular lithium battery module unit; the second terminal parts are used for forming conductive connection among the first terminal parts; and the third terminal parts pass through the through holes so that the terminal assembly can guide current to pass through the through holes. According to the lithium battery module unit of theinvention, the battery cell units are mechanically connected and electrically connected with one another with welding avoided.

Description

technical field [0001] The present application relates to a battery module unit, in particular to a modular lithium battery module unit. Background technique [0002] "Lithium battery" is a type of battery that uses lithium metal or lithium alloy as the negative electrode material and uses a 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 become the mainstream now. [0003] With the further development of science and technology, lithium batteries have become a very important source of electric energy in new energy vehicles and other fields. A single battery cell is often packaged into a battery mo...

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Problems solved by technology

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

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

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