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Battery assembly

A technology for battery components and batteries, applied in battery pack components, flat batteries, primary cells to battery groups, etc., can solve the problems of mutual contact between terminals, complicated wiring, and thickening of battery components, so as to prevent mutual contact and reduce thickness. , the effect of reducing the total number of terminals

Inactive Publication Date: 2009-07-22
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, when the secondary batteries are stacked in the above-mentioned manner, the terminals of adjacent secondary batteries with the insulating film disposed therebetween are close to each other, and thus the terminals may be in contact with each other.
In addition, since the insulating film is provided between adjacent two secondary batteries, the battery pack becomes thicker, which requires more space for installing the battery pack
When multiple secondary batteries are connected in parallel to each other, wiring must be connected to multiple terminals, and if each terminal needs to be connected to wiring, the wiring will become very complicated

Method used

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Embodiment Construction

[0015] The following will refer to Figure 1-7 The battery pack 100 according to Embodiment 1 is described. figure 1 is a perspective view of the battery pack 100 according to this embodiment, figure 2 for along figure 1 Sectional view of line II-II. see figure 1 , a plurality of bipolar secondary batteries (secondary batteries) 4, a plurality of plate-shaped negative electrode collectors (first collector plates) 21 and a plurality of plate-shaped positive electrode collectors (second collector plates) 23 are stacked to form an assembly .

[0016] see figure 2 The bipolar battery 4 is formed by sequentially laminating a plurality of electrode sheets (unit cells) 25 and a current collector foil 29 provided between the electrode sheets 25 . The stacking direction of each electrode sheet 25 is the same as the stacking direction of the bipolar secondary battery 4 , that is, the thickness direction of the battery assembly 100 .

[0017] The electrode sheet 25 includes an e...

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Abstract

A battery assembly includes a plate shaped first collector electrode (21) provided between first and second secondary batteries (4A, 4B) for electrically connecting the first and second secondary batteries (4A, 4B); a second collector electrode (23) of a polarity different from the first collector electrode (21), provided on a surface opposite to the surface of first secondary battery (4A) on which the first collector electrode is provided; a first terminal portion (T1) provided at the first collector electrode and connected to a first conductive member (U1); and a second terminal portion (T2) provided at the second collector electrode and connected to a second conductive member (U2); wherein the first and second terminal portions (T1, T2) are arranged staggered in a direction of stacking.

Description

technical field [0001] The present invention relates to a battery pack formed by stacking a plurality of unit cells. Background technique [0002] Various types of conventional secondary batteries formed by sequentially stacking a plurality of battery cells have been proposed, for example, in Japanese Patent Laid-Open Nos. 2000-311718, 2004-171954, and 2005-011658. Such a secondary battery has collectors provided at opposite ends, and terminals provided on the collectors and connected to wires. [0003] In order to connect a plurality of secondary batteries configured as described above in parallel to each other, a method may be employed in which the plurality of secondary batteries are stacked with an insulating film interposed therebetween so that the respective terminals are connected in parallel to each other. [0004] However, when the secondary batteries are stacked in the above-described manner, the terminals of adjacent secondary batteries with the insulating film d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/04H01M10/42H01M50/502H01M50/528H01M50/55H01M50/553
CPCH01M2/30Y02E60/12H01M10/4207H01M6/48H01M2/206H01M10/0413H01M10/0418H01M10/052Y02T10/7011Y02E60/10H01M50/502Y02P70/50H01M50/553H01M50/55H01M50/50
Inventor 中村好志
Owner TOYOTA JIDOSHA KK