Power battery connectors, power battery modules, power battery packs, automobiles

Abstract

The invention discloses a connector for a power battery, a power battery module, a power battery pack and an automobile. Each of the main planes, the connecting piece includes a first fixing piece, n intermediate pieces and a second fixing piece, the first fixing piece is used to connect with the first power battery, and the second fixing piece is used to connect with the second power battery; The first middle piece of the n middle pieces is connected to the first fixed piece by bending, the n middle pieces are connected in sequence by bending, and the nth middle piece of the n middle pieces is connected to the second fixed piece by bending; The n intermediate sheets are divided into the first group of intermediate sheets including the first to the i-th intermediate sheet and the second group of intermediate sheets including the i+1 to the n-th intermediate sheet, the main plane of the i-th intermediate sheet and The principal planes of the i+1-th intermediate slice intersect each other.

Description

technical field [0001] The present invention relates to the technical field of power batteries, and more specifically, to a power battery connector, a power battery module, a power battery pack and an electric vehicle. Background technique [0002] The power battery modules in the power battery pack are usually connected by copper or aluminum braided wires, laminated guide bars, flat connecting pieces or arched connecting pieces. Although the braided wire is flexible, it needs to press the connection end at the end of the braided wire, which results in a large contact internal resistance at the connection end, and in the case of frequent vibration and complicated working conditions, the reliability is low, and it occupies a large area in the length direction. big space. The structure of the laminated guide bar requires dozens or even dozens of layers of copper foil or aluminum foil, and more than a dozen or dozens of layers of aluminum foil and copper foil are pressed toget...

AI Technical Summary

Problems solved by technology

Although the braided wire is flexible, it needs to press the connection end at the end of the braided wire, which leads to a large contact internal resistance at the connection end, and in the case of frequent vibration and complicated working conditions, the reliability is low, and it occupies a large area in the length direction. big space

The structure of the laminated guide bar requires dozens or even dozens of layers of copper foil or aluminum foil, and a dozen or dozens of layers of aluminum foil and copper foil are pressed together at both ends of the guide bar. The number of layers is large, and the contact internal resistance at both ends of the laminated guide bar is large, and it is usually only suitable for one-dimensional flexible deformation, and it is difficult to achieve three-dimensional flexibility. In addition, the manufacturing process of the laminated guide bar is complicated and the cost is high.

Flat or arched connecting pieces have poor flexibility and vibration resistance, and are prone to fatigue and fracture

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