Lithium battery pack free from welding, easy to maintain and capable of being connected in parallel

Abstract

The invention relates to a lithium battery pack free from welding, easy to maintain and capable of being connected in parallel. During the battery pack fabrication process, spot welding and welding are not needed, and the lithium battery pack is convenient to operate and maintain. In the technical scheme adopted by the invention, the lithium battery pack free from welding, easy to maintain and capable of being connected in parallel comprises a plurality of battery modules and a protection circuit module, wherein the battery modules are connected in an end-to-end way, one end of the whole battery module is connected with the protection circuit module, the battery modules are of sealed shell structures, multiple groups of single-strand battery modules are arranged in the battery modules, positive electrodes or negative electrodes of the single-strand battery modules are connected through a pole plate, the two ends of the pole plate are arranged on two opposite side surface of a shell, each single-strand battery module comprises a plurality of cylindrical monomer batteries, and the positive electrode and the negative electrode at the upper end and the lower end are provided with supports. The lithium battery pack has the advantages that the battery module and the production circuit are two independent modules and are physically pressed and connected, the lithium battery pack is convenient to operate, and a fault is easy to detect.

Description

technical field [0001] The invention relates to a battery pack, in particular to a parallel-connectable lithium battery pack free of welding and easy to maintain. Background technique [0002] As the country's requirements for environmental quality are getting higher and higher, the disadvantage of lead-acid battery materials polluting the environment determines that lead-acid batteries will gradually withdraw from the market. Lithium batteries have the advantages of environmental protection and high specific energy. It is imperative to replace lead-acid batteries. Row. Lithium batteries need to add a protection circuit according to their performance requirements. The single cell needs to be spot welded, and the protection circuit needs to be welded. The manufacturing process is complicated, and after-sales maintenance is very troublesome. In addition, the previous lead-acid batteries were used in modules, and the replacement of lead-acid by lithium batteries must meet the ...

AI Technical Summary

Problems solved by technology

This method can meet the requirements of parallel use of lithium batteries, but the operation process is complex, there are many voltage acquisition wire harnesses, and the thickness and length of the wire harnesses are different, which will affect the accuracy of voltage acquisition, thereby affecting the overall performance of the battery pack. In addition, due to the need for welding Multiple restorative current-limiting temperature control elements are difficult to inspect and repair when a fault occurs. Single strings are connected in parallel one by one, and due to the generation of balanced current, it is easy to generate voltage difference

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