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Current interrupt device

An automatic cut-off and current technology, applied in circuits, electrical components, battery pack components, etc., can solve problems such as inability to resist battery vibration, inability to achieve safety protection, and chemical solution explosions.

Active Publication Date: 2018-10-16
SUZHOU JUTIANHE METAL TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the process of using this technical solution, since the automatic current cut-off device is inside the battery, and there is no connection between the top cover and the aluminum cover plate, the top cover is prone to movement, resulting in drift of the internal resistance of the battery, and the battery cannot resist vibration. , It is easy to open the welding during the vibration of the battery, and it has never been unable to achieve effective safety protection
In addition, since the current automatic cut-off device is inside the battery, when the battery is abnormal, it is easy to contact the internal chemical solution and cause dangerous accidents such as explosion
Increase the possibility of battery explosion, but further increase the potential safety hazard

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] An embodiment of the present invention provides an automatic current cut-off device, referring to figure 1 As shown, the device includes:

[0052] The stress structure 11 and the power-off structure 12, the stress structure 11 is connected to the power-off structure 12, and the stress structure 11 is located on the exhaust hole 13;

[0053] When the internal pressure of the battery changes, the vent hole 13 releases gas and deforms, causing the stress structure 11 to move, and the movement of the stress structure 11 causes the state change of the power-off structure 12, thereby disconnecting the input and output current of the battery.

[0054] Preferably, the device also includes:

[0055] The lever structure 14 is connected to the stress structure 11 and the power-off structure 12 , the stress structure 11 moves, and the state of the power-off structure 12 changes through the lever structure 14 .

[0056] Preferably, the device also includes a limiting structure;

...

Embodiment 2

[0087] An embodiment of the present invention provides an automatic current cut-off device, referring to figure 2 As shown, the device includes:

[0088] The stress structure 21 and the power-off structure 22, the stress structure 21 is connected to the power-off structure 22, and the stress structure 21 is located on the exhaust hole 23;

[0089] When the internal pressure of the battery changes, the vent hole 23 releases gas and deforms, causing the stress structure 21 to move, and the movement of the stress structure 21 causes the state change of the power-off structure 22, thereby disconnecting the input and output current of the battery.

[0090] Specifically, after an abnormality occurs inside the battery and gas is generated, the row of vent holes 23 deforms and protrudes upwards, and exerts a force on the stress structure 21 along the direction of the round hole, so that the stress structure 21 moves along the round hole; the stress structure 21 is connected with the...

Embodiment 3

[0139] An embodiment of the present invention provides an automatic current cut-off device, referring to image 3 As shown, the device includes:

[0140] The stress structure 31 and the power-off structure 32, the stress structure 31 is connected to the power-off structure 32, and the stress structure 31 is located on the exhaust hole 33;

[0141] When the internal pressure of the battery changes, the vent hole 33 releases gas and deforms, causing the stress structure 31 to move, and the movement of the stress structure 31 causes the state of the power-off structure 32 to change, thereby disconnecting the input and output current of the battery. current loop

[0142] preferred,

[0143] The stress structure 31 and the power-off structure 32 are located in the same column 34, the upper part of the column is the power-off structure 32, the lower part of the column 34 is the stress structure 31, and the top of the power-off structure 32 is located in the current loop of the bat...

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Abstract

An embodiment of the present invention provides a current interrupt device, and belongs to the field of battery accessories. The current interrupt device includes a stress structure and a power-off structure. The stress structure is connected to the power-off structure and is located on a vent hole. When the internal pressure of a battery changes, the vent hole discharges gas and deforms, resulting in a movement of the stress structure. The movement of the stress structure causes a state change of the power-off structure, thereby disconnecting input and output of the current of the battery. Bysetting the current interrupt device outside the battery, an internal resistance drift of the battery is avoided, the welding is prevented from easy breakage during vibration of the battery, and thuseffective safety protection is achieved. In addition, since the current interrupt device is set outside the battery, dangerous accidents such as explosion can be avoided when the abnormal battery isin contact with internal chemical solutions, possibility of battery explosion is reduced and security is improved.

Description

technical field [0001] The invention relates to the field of battery accessories, in particular to an automatic current cut-off device. Background technique [0002] Due to its excellent characteristics, lithium batteries have gradually been accepted by the market and developed rapidly. However, during the use of lithium batteries, there are unsafe problems such as battery explosions when the batteries are overcharged or short-circuited. [0003] In order to solve the above problems, the technical solution provided by the prior art is to connect the CID (Current Interrupt device, current automatic cut-off device) combination cover plate and the aluminum cover plate together by sealing welding as the current automatic cut-off device, and install it inside the battery. [0004] However, in the process of using this technical solution, since the automatic current cut-off device is inside the battery, and there is no connection between the top cover and the aluminum cover plate...

Claims

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Application Information

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IPC IPC(8): H01M2/34H01M50/578
CPCH01M50/578Y02E60/10
Inventor 邱实金炫中
Owner SUZHOU JUTIANHE METAL TECHNOLOGY CO LTD
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