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Electrochemical device and electric equipment

An electrochemical and electrode assembly technology, applied in circuits, electrical components, battery pack components, etc., can solve problems such as explosions, potential safety hazards, and bulging and deformation of lithium-ion batteries

Pending Publication Date: 2022-03-04
NINGDE AMPEREX TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Lithium-ion batteries have been widely used in daily life, but lithium-ion batteries are prone to gas generation and expansion under abuse conditions such as short circuit, high temperature, overcharge, etc. If the gas generated cannot be released in time, the lithium-ion battery will bulge, deform or even explode ,There are security risks

Method used

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  • Electrochemical device and electric equipment
  • Electrochemical device and electric equipment
  • Electrochemical device and electric equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] Verify the value range of L. Viewed along the first direction X, the second housing 30 is circular, the first groove 302a is circular, and the second groove 302b is rectangular, r=0.3R, A=0.1×2r, B=8A, h = 0.7H as an example, test numbers 1 to 6 conduct a verification test on the value range of L, and test number 7 conducts a verification test on a lithium-ion battery without the second groove 302b, and the verification standard is: the number of explosions ≤ 3 times Passed the test, the average value of multiple pressure relief pressures is in the range of 1Mpa-4Mpa is better, and the risk of explosion is low.

[0072] Table 1 shows the value range of L and the experimental data without setting the second groove.

[0073]

[0074] It can be seen from Table 1 that the lithium-ion batteries of test numbers 1-6 did not explode by setting the second groove, which shows that the pressure can be effectively released by setting the second groove, and the risk of explosion...

Embodiment 2

[0076] Verify the value range of A. Viewed along the first direction X, the second housing 30 is circular, the first groove 302a is circular, and the second groove 302b is rectangular, L=0.1R, r=0.3R, B=8A, h= Taking 0.7H as an example, the verification test is carried out on the value range of A. The verification standard is: the number of explosions is less than or equal to 3 times and the test is passed. Low.

[0077] Table 2 is the experimental data of the value range of A.

[0078]

[0079]

[0080] It can be seen from Table 2 that the average pressure relief pressure of the lithium-ion battery of test number 2-11 is in the range of 1Mpa≤P≤4Mpa, and no explosion occurred, and the average pressure relief pressure of the lithium-ion battery of test number 1 exceeds 4Mpa, And a small number of explosions occur, and the risk of explosion is high. Therefore, when the value of A is 0.02×2r≤A≤2r, the lithium-ion battery can be safely released, and the risk of explosion i...

Embodiment 3

[0082]Verify the value range of B. Viewed along the first direction X, the second housing 30 is circular, the first groove 302a is circular, and the second groove 302b is rectangular, L=0.1R, r=0.3R, A=0.1×2r, h=0.7H as an example, carry out the verification test on the value range of B, the verification standard is: the number of explosions ≤ 3 times means that the test is passed, the average value of multiple pressure relief pressures is within the range of 1Mpa-4Mpa is better, and the explosion The risk is low.

[0083] Table 3 is the experimental data of the value range of A.

[0084]

[0085]

[0086] It can be seen from Table 3 that the average pressure release pressure of the lithium-ion battery with test number 2-11 is within the range of 1Mpa≤P≤4Mpa, and no explosion occurred, and the average pressure release pressure of the lithium-ion battery with test number 1 exceeds 4Mpa , and a small number of explosions occur, and the risk of explosion increases. Theref...

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Abstract

The invention discloses an electrochemical device and electric equipment with the electrochemical device. The electrochemical device includes an electrode assembly, a first case in which a receiving tank is formed, and a second case covering the receiving tank. The electrode assembly is accommodated in the accommodating groove. The second case includes a first surface facing the electrode assembly and a second surface opposite the first surface. The second shell is provided with a through hole penetrating through the first surface and the second surface. The second surface is provided with a first groove and a second groove. The first groove is communicated with the through hole. And the second groove is communicated with the first groove. By arranging the second groove, the bending strength of the second shell at the second groove is smaller than the bending strength of other positions of the second shell, and when the inside is inflated, the second shell at the junction of the first groove and the second groove is easy to deform, so that the connection of the liquid injection plug and the second shell at the junction of the first groove and the second groove is invalid; and therefore, the risks of expansion deformation and explosion are reduced.

Description

technical field [0001] The present application relates to the field of energy storage technology, in particular to an electrochemical device and electrical equipment. Background technique [0002] Lithium-ion batteries have been widely used in daily life, but lithium-ion batteries are prone to gas generation and expansion under abuse conditions such as short circuit, high temperature, overcharge, etc. If the gas generated cannot be released in time, the lithium-ion battery will bulge, deform or even explode ,There are security risks. Contents of the invention [0003] In view of this, it is necessary to provide an electrochemical device to reduce the risk of swelling, deformation and explosion of the electrochemical device under abuse conditions such as short circuit, high temperature, and overcharge. [0004] An embodiment of the present application provides an electrochemical device, which includes an electrode assembly, a first casing formed with a receiving groove, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M50/655H01M50/153
CPCH01M50/153H01M50/655Y02E60/10
Inventor 陈腾腾
Owner NINGDE AMPEREX TECH
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