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Lithium secondary battery

A lithium secondary battery, lithium ion technology, applied in secondary batteries, lithium storage batteries, batteries, etc., can solve the problems of falling foreign objects, high heat, battery puncture and short circuit, and achieve the effect of inhibiting thermal runaway

Inactive Publication Date: 2010-03-31
MITSUBISHI HEAVY IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On the other hand, even in a stationary battery, there is a possibility that a foreign object may fall from the outside due to an earthquake, etc., and a puncture short circuit may occur in the battery, so some kind of countermeasure is required
[0009] Especially in the case of a large battery, since the heat generated by the short circuit is large, there is a high possibility that the above-mentioned problem will become serious.

Method used

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no. 2 approach

[0082] Below, refer to Figure 8 A second embodiment of the present invention will be described.

[0083] The basic configuration of the lithium secondary battery of this embodiment is the same as that of the first embodiment, but the difference from the first embodiment lies in the configuration between the short-circuit sheet-shaped body and the stacked positive and negative electrodes. Therefore, in this embodiment, using Figure 8 Only the configuration between the short-circuited sheet-shaped body and the laminated positive and negative electrodes will be described, and the description of other constituent elements will be omitted.

[0084] Figure 8 It is a schematic diagram explaining the structure of the lithium secondary battery of this embodiment.

[0085] In addition, the same code|symbol is used for the same component as 1st Embodiment, and description is abbreviate|omitted.

[0086] Lithium secondary battery 1B as Figure 8As shown, it is provided with: a con...

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Abstract

A lithium secondary battery wherein thermal runaway due to short circuit within the battery can be suppressed. In this lithium secondary battery, a positive electrode (3) having a positive electrode active material for adsorbing and discharging lithium ions, a negative electrode (4) for adsorbing and discharging lithium ions, a dummy positive electrode (6) connected to a positive electrode terminal, and a dummy negative electrode (7) connected to a negative electrode terminal are laminated alternately. A dummy laminate (9) having a short circuit separator (8) for insulation between the dummy positive electrode (6) and the dummy negative electrode (7) is also provided and laminated on the outside of the positive electrode (3) and the negative electrode (4) laminated alternately.

Description

technical field [0001] The present invention relates to a lithium secondary battery suitable for use in electric power storage devices, power supply systems for mobile bodies, natural energy mixing systems, and the like. Background technique [0002] Affected by increased awareness of energy and environmental issues in recent years, power storage devices, mobile power supply systems, natural energy hybrid systems, and the like have attracted attention as countermeasure technologies for these issues. Among them, a large lithium secondary battery as a storage battery is considered to be particularly promising. [0003] Compared with other secondary batteries such as lead batteries and nickel-hydrogen batteries, lithium secondary batteries have advantages such as high energy density, good output characteristics, and long life. However, in lithium secondary batteries, there is a possibility of thermal runaway of the battery due to internal short circuit, overcharging, etc. of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/052H01M10/0585H01M4/13H01M10/058H01M10/0583
CPCY02E60/12H01M10/0583H01M10/4235H01M2/34H01M10/0585H01M2200/00H01M10/052H01M10/058Y02E60/10Y02P70/50H01M10/0525H01M50/572
Inventor 今坂功二田岛英彦足立和之和田好弘松永祯纪
Owner MITSUBISHI HEAVY IND LTD
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