Battery module with same-side electrode output

Abstract

The invention discloses a battery module with same-side electrode output, which comprises a plurality of square batteries arranged in sequence, and the positive electrodes and the negative electrodesof the batteries are positioned at the top and are respectively arranged at two sides of the central axis of the arrangement direction of the batteries. Along the arrangement direction of the batteries, the positive and negative electrodes of the first battery and the second battery are arranged on different sides, and then the positions of the positive and negative electrodes of every two batteries are changed. The positive electrode of the first battery is connected with the positive output electrode of the battery module, and the negative electrode of the second battery is connected with the negative output electrode of the battery module; the negative electrode of the first battery is connected to the positive electrode of the third battery, and the positive electrode of the second battery is connected to the negative electrode of the fourth battery, and so on. The bus connection mode of the series batteries in the battery module can reserve enough space for the monitoring circuitboard, and when the module package is formed, the low-voltage line connected with the monitoring circuit can be separated from the bus high-voltage wiring harness connected with the positive electrodeand the negative electrode of the battery module, so that the electromagnetic interference of the bus to the low-voltage line is greatly reduced.

Description

Technical field [0001] The present invention relates to battery module assembly of square batteries. Background technique [0002] In the field of electric energy storage, the battery is the smallest energy storage unit. Due to technical reasons, the output power of a single battery is low. Therefore, it is necessary to connect several square batteries in series to form a battery module, then form a module package from several battery modules, and finally form a battery energy storage module from several module packages. In the prior art, the positive and negative electrodes of the batteries in the battery module are usually arranged in a staggered arrangement, that is, the positive and negative electrodes of two adjacent batteries are opposite. In this case, when the batteries in the battery module are connected in series, the positive electrode of the first battery is connected to the positive output electrode of the battery module, the negative electrode is connected to the p...

AI Technical Summary

Problems solved by technology

The welding fixing method has the following defects: first, it requires high assembly precision, and there is no problem of elastic buffer space in the welded mouth-shaped frame; second, the welding process is complicated, such as aluminum alloy profile welding, which cannot even work in the open air The third is that due to the complicated welding process, the welding yield is relatively low, and the end plate and side plate after the welding failure are directly scrapped and cannot be reworked, resulting in relatively high manufacturing costs; the fourth is that after welding, between the end plate and the side plate There may be cracks that cannot be detected by ultrasonic waves in the welding seam between them. Under normal circumstances, there is no problem with this kind of crack, but in the environment where the car is constantly vibrating and impacting, the cracks gradually expand and form cracks, which eventually lead to welding seams. Fracture, causing the entire battery module to fall apart

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