Liquid leakage propagation restraining structure for electricity storage device and bus bar module

Abstract

In a liquid leakage propagation restraining structure, a voltage detection terminal that detects the voltage of an electricity storage device is connected to an electrode of the electricity storage device so that a crimp contact surface side of the voltage detection terminal to which an electric cable is crimped faces in the direction opposite the direction to the electrode. Therefore, the structure restrains the electrolytic solution that has leaked out and propagated to the electric cable from entering the interior of the core wire of the electric cable.

Description

technical field [0001] The present invention relates to a liquid leakage and diffusion suppression structure of an electrolytic solution for an electric storage device such as a secondary battery or the like, and also relates to a bus bar module. Background technique [0002] As described in Japanese Patent Application Publication No. 2000-333343 (JP-A-2000-333343) (FIG. 7, FIG. 8, FIG. In a battery of objects, bus bar modules (battery connection modules) are attached to both sides of the battery pack in order to connect in series a plurality of electric cells constituting the battery pack. The busbar module is made of synthetic resin or the like. Each busbar module has: a busbar, each busbar electrically connects an electrode of an electric cell with an electrode of another electric cell; and a voltage detection terminal, each voltage detection terminal is configured to detect the voltage of one or more than one electric cell. The electrodes, busbars, and voltage detectio...

AI Technical Summary

Problems solved by technology

Therefore, in the case where the electrolytic solution leaks on the positive electrode P or the negative electrode N and diffuses to the crimping contact portion 22b adjacent to the voltage detection terminal, since there is no gap between the wall of the wiring space S and the crimping contact portion 22b or the cable C, Gap, electrolytic solution leakage does not exist the exit of the crimping contact part 22b of the escape voltage detection terminal 22 and accumulates near the crimping contact part 22b, so the electrolytic solution may enter the core wire of the cable C, and may be in the cable due to capillary action Diffusion within the core of C

[0009] In addition, since there is no gap between the wall of the wiring space S and the crimping contact portion 22b or the cable C, the sealing material for preventing leakage of the electrolytic solution cannot be filled in the crimping contact portion 22b due to the lack of a space in which the sealing material is filled. nearby

Therefore, sealing against liquid leakage cannot be performed

Images