Connector of power battery, power battery module, power battery pack and automobile

Abstract

The invention discloses a connector of a power battery, a power battery module, a power battery pack and an automobile. The connector comprises five connecting pieces, each one of the connecting pieces limits a main plane, the five connecting pieces comprise first, second and third middle pieces, a first fixing piece connected to a first power battery and a second fixing piece connected to a second power battery, the first to third middle pieces are orderly connected to form a three-dimensional structure by bending, main planes of each two adjacent middle pieces of the first, second and third middle pieces are different, the first fixing piece is connected to the free end of the first middle piece and the second fixing piece is connected to the side of the third middle piece. The connector for a power battery has a simple structure and a small occupy space, is convenient to prepare, has a low cost, replaces a braided wire structure, prevents wire pressing at the wiring position and reduces the contact resistance.

Description

technical field [0001] The present invention relates to the technical field of power batteries, and more particularly, to a connector for a power battery and a power battery module, a power battery pack and an electric vehicle having the connector. 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, the connection end needs to be pressed at the end of the braided wire, resulting in a large contact resistance of the connection end, and in the case of frequent vibration and complicated conditions, the reliability is low, and the length direction is occupied. big space. The laminated guide bar structure requires dozens or even dozens of layers of copper foil or aluminum foil, and ten or dozens of layers of aluminum foil and copper foil are pressed together at both ends of the gu...

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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