Battery cell electric connection switching sheet

Abstract

The invention provides a battery cell electric connection switching sheet applied to the technical field of lithium batteries. A switching sheet body (1) of the battery cell electric connection switching sheet comprises a body low position part (3) and a body high position part (4), a T-shaped through hole (6) is formed in the body high position part (4), a fastening part (2) is of a T-shaped structure, the fastening part (2) is installed in the T-shaped through hole (6), a thread (7) is arranged in the fastening part (2), body low position part (3) is welded to a battery cell pole (8), and the body high position part (4) is connected with a battery cell connection bar by a bolt (9). According to the battery cell electric connection switching sheet, the connection between the battery cellconnection bar and the battery cell is conveniently and reliably realized, the welding goodness rate of the switching sheet and the battery cell pole is effectively realized, the connection reliability when the bolt is fixedly connected with the battery cell connection bar is realized, the safety and reliability of installation at the connection position are enhanced, the quality is comprehensively improved, and the maintenance cost of a battery cell product with the switching sheet is reduced.

Description

technical field [0001] The invention belongs to the technical field of lithium batteries, and more specifically relates to a battery cell electrical connection adapter. Background technique [0002] In the battery pack system in the prior art, there are mainly two types of connection between the battery cells, one is welding and the other is mechanically fixing with fasteners. There are two main methods of mechanical fixation with fasteners. The first method is to design threaded holes or studs on the pole of the cell top cover for mechanical fixation; the second method is to additionally weld the adapter piece and tap the thread on the adapter piece. Mechanical fixation after the hole; the above method 1, tap the threaded hole on the pole of the top cover, if there is no inlaid wire thread sleeve, the pole is made of 1 series aluminum, it is easy to slip during the fixing process, such as inlaying the wire thread sleeve, when installing The wire thread sleeve is easy to co...

AI Technical Summary

Problems solved by technology

There are two main methods of mechanical fixation with fasteners. The first method is to design threaded holes or studs on the pole of the cell top cover for mechanical fixation; the second method is to additionally weld the adapter piece and tap the thread on the adapter piece. Mechanical fixation after the hole; the above method 1, tap the threaded hole on the pole of the top cover, if there is no inlaid wire thread sleeve, the pole is made of 1 series aluminum, it is easy to slip during the fixing process, such as inlaying the wire thread sleeve, when installing The wire thread sleeve is easy to come out during the process, which affects the fixing effect; if the stud method is used, the stud is easily deformed by force during the transfer process, which affects the fixation, and because it is a protruding part, the risk of external short circuit of the battery cell is increased, so this method Rare; method 2, in order to ensure the welding efficiency, the adapter piece is made of the same aluminum material as the pole, the aluminum base material is soft, and the same problem as method 1 exists after tapping; there is also a combined method, that is, welding The position is made of the same aluminum material as the pole, and the bolt fixing position is made of high-strength work-hardened aluminum material. The two materials are connected by bolts. The bolt connection requires high installation torque. If the process is not well controlled, it will easily fall off and fail. , and the manufacturing cost is relatively high; there are also high-strength work-hardened aluminum materials directly used as adapters, but this aluminum material and the pole aluminum material are not in the same series, and cracks are prone to occur when laser welding is performed between the two. , which affects the production welding efficiency and cannot meet the demand

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