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Secondary battery module

A technology for secondary batteries and components, which is applied to secondary batteries, battery pack parts, electrical components, etc., can solve the problems of forming stepped parts, difficult to build a current interrupt mechanism, and battery container expansion.

Inactive Publication Date: 2010-06-02
HITACHI AUTOMOTIVE SYST LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in the above-mentioned thin-film secondary battery, since the electrode group is covered with a thin film, it is extremely simple, so it is difficult to incorporate a current interrupting mechanism in each unit cell.
In addition, since the film has flexibility, it is difficult to form a stepped portion as in the technology of Patent Document 3.
Therefore, in the event of an overcharged state, the current continues to flow and the internal pressure cannot be lowered, causing the battery container to swell.
In a secondary battery module using such a thin-film secondary battery, it is difficult to ensure safety when the battery is abnormal.

Method used

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no. 1 Embodiment approach

[0021] Hereinafter, a first embodiment of the secondary battery module according to the present invention will be described with reference to the drawings.

[0022] (structure)

[0023] Such as figure 1 As shown, the secondary battery module (hereinafter, simply referred to as a module) 30 of this embodiment has eight film-type lithium ion secondary batteries (hereinafter, simply referred to as single cells) using a flexible member, that is, a layered film, in a battery container. .) 20. In the module 30 , the eight single cells 20 , connection members described later, and the like are integrally mounted in a frame made of aluminum alloy (not shown).

[0024]The battery 20 has flat surfaces on two opposing surfaces. The eight cells 20 are arranged such that their positive and negative terminals alternate with each other. Adjacent single cells 20 are arranged such that their planar portions face each other, and adjacent single cells 20 are bonded to each other by double-sid...

no. 2 Embodiment approach

[0049] Next, a second embodiment of the secondary battery module according to the present invention will be described. In addition, since the single cell 20 ( 20 a ) and the structure in which eight single cells are stacked in this embodiment are the same as those in the first embodiment, the same reference numerals are assigned to the same members as in the first embodiment and their descriptions are omitted. Hereinafter, differences will be described. place.

[0050] (structure)

[0051] Such as image 3 As shown, the secondary battery module (hereinafter, simply referred to as a module) 40 of the present embodiment has eight single cells 20 using a layered film in a battery container. In the module 40 , the eight single cells 20 and a leaf plate described later are integrally mounted in a frame made of aluminum alloy (not shown). In addition, in the present embodiment, the battery capacity of the unit cell 20 a is set to be 5% smaller than the battery capacity of the uni...

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Abstract

The present invention provides a secondary battery module capable of securing safety at a time of abnormal battery operations by using a film-type secondary battery. A module 30 is provided with 8 pieces of single batteries 20 each using a laminate film as its battery container. The 8 pieces of single batteries are disposed in a layer-stacked state. A conducting plate 17 is placed in a manner to face one single battery 20a disposed at one end of the 8 pieces of the single batteries 20. A pushing member 14 is formed between the single battery 20a and conducting plate 17. A conducting plate 18 is disposed on a side of the conducting plate 17 opposite to the pushing member 14. The pushing member 14 has projected portions 14b. The conducting member 17 has through-holes 17a formed so that the projected portions are able to pass through. The conducting plates 17 and 18 are coupled by a coupling portion 21. When any one of the single batteries 20 and single battery 20a expands at a time of abnormal battery operations, the projected portions pass through the through-holes to break off the coupling at the coupling portion 21.

Description

technical field [0001] The present invention relates to a secondary battery pack, and particularly relates to a secondary battery pack having a single battery using a flexible member as a battery container, or a plurality of single cells connected in series or in parallel in a stacked state using a flexible member as a battery container. Background technique [0002] Conventionally, a so-called secondary battery module in which a plurality of cylindrical sealed secondary batteries are connected in series or series-parallel has been used as a power source for charging and discharging a large current such as an electric vehicle or a hybrid vehicle. Generally, in such a large-current charge-discharge power supply, for example, 40 to 100 cylindrical sealed secondary batteries are used. [0003] In a cylindrical container used for a cylindrical sealed secondary battery, iron-based materials are generally used in order to reduce costs. However, since iron has a large specific gra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/00H01M10/00
CPCY02E60/12Y02E60/10
Inventor 小熊幹男石津竹规
Owner HITACHI AUTOMOTIVE SYST LTD