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Battery module

A battery module and collector plate technology, which is applied in the manufacture of secondary batteries, battery pack components, circuits, etc., can solve the problems of increased resistance of collector plates and electrode plates, fracture of welding parts, etc., and prevent cracks and fractures , the effect of reliable connection

Active Publication Date: 2009-09-16
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, stress concentration occurs on and near the welded portion between the current collector plate with residual elastic force and the electrode plate closest to the connection portion, causing the welded portion to break, thereby collecting electricity at the broken portion. The resistance between the plate and the electrode plate increases

Method used

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Examples

Experimental program
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Effect test

no. 1 example

[0031] The secondary battery 100 (also referred to as "battery module") according to the first embodiment is a nickel-metal hydride secondary battery that can be used as a power source for driving electric vehicles and hybrid vehicles. The secondary battery 100 has six power generating elements 110 and a battery case 170 composed of a case body part 171 and a cover part 176 for accommodating the power generating elements 110 (see FIGS. figure 2 ). Also, each power generating element 100 includes an electrode stack 160 composed of a plurality of positive electrode plates 161 and a plurality of negative electrode plates 162, a positive electrode collector plate 111 on which the positive electrode plates 161 are bonded, and a negative electrode stack. The plate 162 is bonded to the negative electrode collector plate 131 thereon. The case body part 171 has a rectangular parallelepiped shape. Inside the housing body part 171 , six installation spaces 173 partitioned from each ot...

no. 2 example

[0064] Next, a second embodiment of the present invention will be described with reference to FIG. 6 . The power generating element 210 in the second embodiment is the same as the power generating element 110 in the first embodiment except for the structures of the first current collector plate and the second current collector plate. Thus, the following description focuses on parts and elements that are not the same, and the description of the same parts and elements as those in the first embodiment is omitted or simplified.

[0065] In the second embodiment, the positive electrode collector plate 211 of each power generating element 210 has a positive electrode connection portion 212 , a positive electrode connection side portion 215 , and a positive electrode plate distal portion 216 including a positive electrode plate portion 213 . The positive electrode plate portion 213 includes a positive electrode plate welding portion 214 . Likewise, the negative electrode collector ...

no. 3 example

[0073] Next, reference will be made to Figure 7 and Figure 8 A third embodiment of the present invention will be described. The power generating element 310 in the third embodiment is the same as the power generating element 110 in the first embodiment except for the structures of the first and second collector plates. Thus, the following description focuses on parts and elements that are not the same, and the description of the same parts and elements as those in the first embodiment is omitted or simplified.

[0074] In the power generating element 310 of the third embodiment, each positive electrode collector plate 311 has a positive electrode connection portion 312 , a positive electrode connection side portion 315 , and a positive electrode plate distal portion 316 including a positive electrode plate portion 313 . The positive electrode plate portion 313 includes a positive electrode plate welding portion 314 . The negative electrode collector plate 331 includes a neg...

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Abstract

A secondary battery according to the invention includes six power generation elements and a case having six mounting spaces in which the power generation elements are disposed, respectively. A positive electrode connecting portion of a positive electrode current collector plate of one of the power generation elements adjacent to each other is connected via a connecting hole in a partition wall to a negative electrode connecting portion of a negative electrode current collector plate of the other power generation element, whereby the secondary battery is provided. The positive electrode connecting portion of the positive electrode current collector is formed so as to bend more easily in an approaching direction B2, which is opposite to a detaching direction B1, than a first positive electrode plate welded portion and a positive electrode plate adjacent distal portion, where bending portions are provided on both sides, do.

Description

technical field [0001] The invention relates to a battery module. Background technique [0002] In recent years, various secondary batteries have been proposed as power sources for portable devices and mobile devices, and also as power sources for electric vehicles and hybrid vehicles (for example, see JP-A-2001-93505). [0003] A secondary battery (battery module) described in JP-A-2001-93505 has an electrode assembly each including a positive electrode plate, a negative electrode plate, and two collector plates for the positive electrode and the negative electrode, respectively (No. first and second collector plates); and a housing having a plurality of battery cavities (installation spaces), each of which is separated from each other by a partition wall. In the electrode assembly, the first collector plate is welded to one of the positive electrode plate and the negative electrode plate, and the second collector plate is welded to the other of the positive electrode plat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/04H01M2/26H01M50/529
CPCH01M2/24Y02E60/12Y02E60/124Y02E60/10H01M50/529Y02P70/50
Inventor 神户丰朝比奈孝大西正人
Owner TOYOTA JIDOSHA KK