Battery pack with tab connection device

Abstract

The invention discloses a battery pack which comprises multiple overlapped battery monomers, wherein the battery monomers are connected in series. The battery pack further comprises a tab connection device and is characterized in that the tab connection device comprises an insulating connection plate and multiple conductive connection columns, wherein the insulating connection plate comprises multiple grooves; the grooves are formed in the side, back to the battery monomers, of the insulating connection plate; to-be-connected positive and negative tabs of adjacent two battery monomers of the multiple overlapped battery monomers pass through the insulating connection plate respectively and are bent into the same groove and mutually overlapped in the groove; the conductive connection columns are inserted into the groove to fixedly connect the overlapped parts of the positive and negative tabs.

Description

technical field [0001] The invention relates to a battery pack, in particular to a battery pack with a tab connection device. Background technique [0002] Lithium battery is a new type of energy storage battery, which has the advantages of high energy density and long life, but also has the disadvantages of technical difficulty and danger. The energy storage of a single lithium battery is limited. For high-power power supplies that require lithium batteries, multiple lithium batteries must be used to form a battery pack to achieve high energy storage and high power requirements. This requires a reasonable design of the mechanism to integrate these lithium batteries. connect them. Since the current of the battery pack is very large, and the battery pack may be shaken during operation and the connection may be loose, it is required that the battery tabs must be reliably connected and the contact resistance is small. [0003] Conventional lithium battery lugs are connected b...

AI Technical Summary

Problems solved by technology

[0003] Conventional lithium battery lugs are connected by welding, and bolts or rivets are also used for locking, but there are often the following problems: special welding equipment must be used for welding, mainly ultrasonic welding, and large-capacity battery packs There are many layers of tabs. With the increase of capacity, the number of tabs can reach more than 100 layers. This requires very high power for ultrasonic welding machines. It is difficult to weld firmly for tabs with more than 50 layers, and multi-layer tabs After being ultrasonically welded, it is easy to become brittle and easy to break, causing the battery pack to be scrapped. In addition, it is difficult to lead out wires for voltage measurement by welding. When one of the batteries is damaged, it cannot be disassembled and must be replaced as a whole; it is locked with bolts or rivets. The best way is to punch holes in the multi-layer lugs together, and then lock them together with bolts or rivets. This connection method is very awkward, and it is easy to cause a short circuit between them, and it is also difficult to perform insulation treatment.

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