Electricity storage module and electrically powered vehicle with electricity storage module

Abstract

The invention provides an electricity storage module, in which plurality of stacked storage cells can be certainly restrained by using the thin-walled and light-weight restraining bands, and deformation of the restraining bands can be suitably inhibited, and an electrically powered vehicle with the electricity storage module. In the electricity storage module 20A, a pair of restraining bands 30a and 30b extended along the side surface of a storage cell group 22M are connected with end plates 28a and 28b. Each of the restraining bands 30a and 30b has a flat surface 44a, a first bent portion 44b and a second bent portion 44c that bend from the width direction of the flat surface 44a towards the two ends and along a direction approaching to each other. The first bent portion 44b is connected with intermediate plate 40 near its center in the stacking direction of the storage cell group 22M.

Description

technical field [0001] The present invention relates to an electricity storage module and an electric vehicle equipped with the electricity storage module. The electricity storage module includes a battery pack in which a plurality of batteries are stacked, and a pair of end plates are disposed at both ends of the battery pack in a stacking direction. And the pair of end plates are connected by a restraint band. Background technique [0002] Generally, an electricity storage module is known that includes a battery pack (battery module) in which a plurality of batteries (battery cells) are stacked. Since this power storage module is mounted on electric vehicles such as hybrid vehicles and EVs, for example, the output voltage is set high by stacking a plurality of storage batteries. [0003] In the power storage module, a pair of end plates are arranged at both ends in the stacking direction of the batteries, and the pair of end plates are fastened and connected by a pair of ...

AI Technical Summary

Problems solved by technology

Therefore, there is a problem that the trapezoidal frame made of metal plates is easily deformed in a direction intersecting the stacking direction due to vibrations, etc.

[0010] Therefore, for example, in order to ensure the desired rigidity, it is conceivable to set the thickness of the trapezoidal frame to be large, but there is a problem that the entire power storage module becomes heavy and increases in size.

In addition, it is considered to use a highly rigid separate frame to support not only both ends of the power storage module but also near the center to prevent the above-mentioned deformation, but there are problems such as an increase in the number of parts and weight.

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