Power supply device and vehicle having the same

Abstract

The invention provides a power supply device capable of making the temperatures of the battery cells almost consistency at any position by reducing the temperature differences, and a vehicle having the same.A power supply device includes rectangular battery cells 1, resin separators 2, end spacers, thick metal end plates, and coupling members. The separator 2 is inserted between the cells 1 to insulate adjacent cells 1 from each other, and in thermal contact with the cells 1. The end spacers cover end battery cells on the opposed end surfaces of a battery block composed of the cells and the separators alternately arranged. The end plates cover the surfaces of the end spacers. The coupling members couple the end plates to each other. The separators form gaps for flowing air along the surfaces of the cells in contact with the separators. The end spacers have hollow layers on their surfaces in contact with the cells, and define closed chambers.

Description

technical field [0001] The present invention relates to a power supply device in which a plurality of battery cells are stacked with separators interposed therebetween, and a vehicle using the power supply device. Background technique [0002] A power supply unit or a battery system that stacks a plurality of battery cells and blows forced air into cooling gaps between the battery cells is used in vehicles such as hybrid cars and electric vehicles. In such a power supply device, since a plurality of battery cells are used, a temperature difference occurs among the battery cells. In particular, increasing the number of stacked battery cells makes it difficult to cool all the battery cells at the same temperature, that is, while reducing the temperature difference. In a battery system for a vehicle in which a plurality of battery cells are stacked, it is extremely important to reduce the temperature difference of the battery cells as much as possible. This is because the tem...

AI Technical Summary

Problems solved by technology

Due to such a temperature difference of the battery cells, there are differences in the characteristic deterioration and lifetime of the battery cells.

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