Non-welded power battery module

Abstract

The invention discloses a non-welded power battery module. Each battery module unit comprises a left battery box and a right battery box which are fastened to locate and arrange lithium battery cores therein in a matrix arrangement manner, conductive holes corresponding to positive electrodes and negative electrodes of the lithium battery cores are formed in the bottom of each of the left battery box and the right battery box, electrode plates are separately arranged corresponding to the left battery box and the right battery box, and the left electrode plate and the right electrode plate are fastened to the bottoms of the left battery box and the right battery box respectively; multiple battery module units are superposed into a group and are connected into a fastening body through bolt and nut assemblies which run through the battery module units; electrode contacts, at the positions of the lithium battery cores, on the electrode plates are in elastic contact with lithium battery core electrodes through the corresponding conductive holes; conducting plates are clamped between the electrode plates of the adjacent battery module units and on the left and right outermost electrode plates; and the electrode contacts have enough elasticity to ensure reliable contact with the corresponding electrodes when the fastening body is loosened. The non-welded power battery module has the advantages of being close in electrode contact, convenient and fast to disassemble and assemble, high in production efficiency and low in manufacturing cost.

Description

technical field [0001] The invention relates to electric vehicle power battery technology, in particular to a welding-free power battery module. Background technique [0002] The traditional manufacturing process of electric vehicle battery modules is as follows: the cells are welded one by one to form a module unit (composed of 18650 lithium cells, plastic frames plus copper metal connecting guide posts, nickel-plated stainless steel sheets welded and nickel-plated metal copper sheets), several Each module unit constitutes the required modules, and each module unit generally includes dozens of batteries (designed according to battery capacity and voltage requirements). [0003] The traditional welding method is high-frequency spot welding or laser welding. If there are 52 lithium batteries in a single module unit, a single module unit needs to be welded 104 times. No solder joints or missing solder joints. [0004] If the module unit finds that there is a problem with ind...

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Problems solved by technology

[0004] If the module unit finds that there is a problem with individual lithium batteries after the welding is completed, the module unit must be opened and the battery with the welding problem must be pulled out, causing the entire module unit to be destroyed and become a defective product

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