Single battery, power battery pack and vehicle

Abstract

The invention discloses a single battery, a power battery pack and a vehicle, the single battery comprises: a shell, wherein end plates are arranged at the two ends of the shell, each end plate is provided with at least two electrode terminals, and the electrode terminals penetrate through the end plates; a pole core which is contained in the shell, wherein the pole core comprises a plurality of pole pieces, tabs are led out of the centers of the pole pieces in the length direction in the width direction of the pole pieces, and the ends, stretching into the inner sides of the end plates, of the electrode terminals are connected with the corresponding tabs; and the width of the tabs is L1, and the width L2 of the pole piece meets the following conditions: L1 is greater than or equal to 40mmand less than or equal to 120mm, L2 is greater than or equal to 600mm and less than or equal to 1500mm, and L2 / L1 is greater than or equal to 5 and less than or equal to 30. According to the single battery provided by the invention, each end plate of the single battery is provided with at least two electrode terminals, so that the whole pack can be maintained when the single battery breaks down,and the tab led out from the middle is designed, so that a current collecting path can be shortened, overcurrent is improved, and impedance is reduced.

Description

Technical field[0001]The present application relates to the technical field of vehicle manufacturing, in particular to a single battery, a power battery pack having the single battery, and a vehicle having the power battery pack.Background technique[0002]On the one hand, most of the current single batteries have a positive electrode terminal on one side and a negative electrode terminal on the other side. In this way, when one electrode terminal of the single battery fails, the entire single battery is paralyzed and cannot work normally. , The battery needs to be replaced, the use cost is high, and the batteries are bonded by structural glue, which is not easy to disassemble, resulting in excessive maintenance costs.[0003]On the other hand, when the size of a single battery in a certain direction is larger, higher requirements will be imposed on the battery's overcurrent capability, and the internal resistance will also be larger, so there is room for improvement.Summary of the inve...

AI Technical Summary

Problems solved by technology

[0002] On the one hand, most of the current single batteries are provided with a positive electrode terminal on one side and a negative electrode terminal on the other side. In this way, when one electrode terminal of the single battery fails, the entire single battery is paralyzed and cannot work normally. , the battery needs to be replaced again, the cost of use is high, and the batteries are bonded with structural glue, which is not easy to disassemble, resulting in high maintenance costs

[0003] On the other hand, when the size of a single battery is large in a certain direction, higher requirements will be placed on the battery's overcurrent capability, and at the same time, the internal resistance will also be large, and there is room for improvement

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