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sealed battery

一种密闭型、电池的技术，应用在电池、二次电池、电池组零部件等方向，能够解决集电板断裂等问题，达到抑制经时劣化的效果

Active Publication Date: 2016-08-17
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The internal pressure of the casing repeatedly rises and falls due to temperature changes, thereby accumulating fatigue on the current collector plate, and even if the internal pressure of the casing does not reach the value required for the rupture of the current collector plate, the current collector plate still occurs. risk of breaking

Method used

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Embodiment Construction

[0030] Below, refer to Figure 1 ~ Figure 4 , the battery 1 as one embodiment of the sealed battery according to the present invention will be described.

[0031] The battery 1 is a so-called cylindrical battery.

[0032] Furthermore, for the convenience of explanation, the figure 1 The up-down direction in is defined as the up-down direction of the battery 1 .

[0033] In addition, in the following description, upper and lower have substantially the same meanings as the outer side of the battery 1 and the inner side of the battery 1 .

[0034] Such as figure 1 As shown, the battery 1 is a sealed secondary battery, and is provided with: an electrode body 10 impregnated with an electrolytic solution and functioning as a power generating element; a case 20 for accommodating the electrode body 10 together with the electrolytic solution; Current CID100.

[0035] The electrode body 10 is formed by laminating a pair of sheet-shaped electrodes (a positive electrode and a negativ...

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Abstract

The present invention provides a sealed battery capable of suppressing deterioration of a current interrupt mechanism (CID) over time. The battery (1) includes: an electrode body (10) impregnated with an electrolyte solution and functioning as a power generating element; a case (20) that accommodates the electrode body (10) together with the electrolyte solution; and a CID (100) , it cuts off the current when it is abnormal, and the CID (100) has a reverse plate (110) and a collector plate (120). The plate (120) is joined with the reverse plate (110), and deforms along with the deformation of the reverse plate (110), and a groove-shaped marking part (123) and a plurality of slits ( 124, 124...), the groove-shaped marking part (123) breaks when the internal pressure of the casing (20) becomes more than a predetermined value, and a plurality of slits (124, 124...) are formed as Through the plate surface of the collector plate (120), a plurality of slits (124, 124...) are arranged near the engraved part (123), and are formed to open when the collector plate (120) is deformed.

Description

technical field [0001] The present invention relates to a sealed secondary battery provided with a current shutoff mechanism for shutting off current at abnormal times. Background technique [0002] Conventionally, a sealed secondary battery is provided with an electrode body in which a pair of sheet-shaped electrodes (a positive electrode and a negative electrode) are stacked and wound with a separator interposed therebetween, and a case that accommodates the electrode body together with an electrolytic solution. (hereinafter referred to as "sealed battery") is widely known. [0003] In the above-mentioned sealed battery, when an overcharged state occurs, there are problems such as an increase in the internal pressure of the case due to the gas generated by the decomposition reaction of the electrolyte solution in the case, and damage to the case. concern. [0004] In order to solve such a problem, a sealed battery has been proposed (for example, refer to Patent Document ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/34H01M2/12
CPCH01M50/342H01M50/3425H01M50/578Y02E60/10H01M10/4235H01M2200/20H01M50/107H01M50/394
Inventor 板桥利幸
Owner TOYOTA JIDOSHA KK
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