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Lithium battery self-discharge testing device

A test device and self-discharge technology, applied in lithium batteries, non-aqueous electrolyte battery electrodes, secondary batteries, etc., can solve problems such as lack of verification experiments, failure of barriers to function normally, and inability to quantify the degree of self-discharge impact.

Pending Publication Date: 2021-11-05
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the quality of the diaphragm is faulty or damaged, the role of the barrier will not function properly, and the positive and negative electrodes will be in contact, which will cause physical self-discharge
In the process of battery self-discharge analysis, when the battery is disassembled, black spots and damage to the separator are often observed, which can be qualitatively judged as the cause of the self-discharge of the battery, but there is a lack of verification experiments, and the black spots and damage of the separator at a single point have a great impact on self-discharge. The extent of the impact cannot yet be quantified

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] refer to figure 2 , a kind of lithium battery self-discharging testing device that the present invention proposes, and manufacturing method comprises the following steps:

[0042] S1. Take aluminum foil and copper foil with a flat surface, and punch them into a rectangle of 65mm×55mm on a punching machine, one side of which has a tab shape, so as to obtain the first metal foil material 1 and the second metal foil material 2;

[0043] S2. Welding the first tab 3 and the second tab 4 to the reserved tab areas of the first metal foil 1 and the second metal foil 2 respectively;

[0044] S3. From bottom to top, place the first metal foil material 1, the diaphragm 6, and the second metal foil material 2 in sequence, fix them with tape and package them in an aluminum-plastic film with a size of 80mm×100mm, and then place them in the aluminum-plastic film. Fill the electrolyte so that the whole is immersed in the electrolyte;

[0045] S4. Seal the aluminum-plastic film in a ...

Embodiment 2

[0054] refer to figure 2 , a kind of lithium battery self-discharging testing device that the present invention proposes, and manufacturing method comprises the following steps:

[0055] S1. Take aluminum foil and copper foil with a flat surface, and punch them into a rectangle of 65mm×55mm on a punching machine, one side of which has a tab shape, so as to obtain the first metal foil material 1 and the second metal foil material 2;

[0056] S2. Welding the first tab 3 and the second tab 4 to the reserved tab areas of the first metal foil 1 and the second metal foil 2 respectively;

[0057] S3. From bottom to top, place the first metal foil material 1, the diaphragm with black spots 6, and the second metal foil material 2 in sequence, fix them with adhesive tape and package them in an aluminum-plastic film with a size of 80mm×100mm, and then place them on the aluminum foil. Electrolyte is filled in the plastic film so that the whole is immersed in the electrolyte;

[0058] S...

Embodiment 3

[0067] refer to figure 2 , a kind of lithium battery self-discharging testing device that the present invention proposes, and manufacturing method comprises the following steps:

[0068] S1. Take aluminum foil and copper foil with a flat surface, and punch them into a rectangle of 65mm×55mm on a punching machine, one side of which has a tab shape, so as to obtain the first metal foil material 1 and the second metal foil material 2;

[0069] S2. Welding the first tab 3 and the second tab 4 to the reserved tab areas of the first metal foil 1 and the second metal foil 2 respectively;

[0070] S3. From bottom to top, place the first metal foil material 1, the microporous diaphragm 6, and the second metal foil material 2 in sequence, fix them with adhesive tape and package them in an aluminum-plastic film with a size of 80mm×100mm, and then place them on the aluminum foil. Electrolyte is filled in the plastic film so that the whole is immersed in the electrolyte;

[0071] S4. Se...

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PUM

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Abstract

The invention provides a lithium battery self-discharge testing device. The lithium battery self-discharge testing device comprises a first metal foil, a second metal foil, a first tab, a second tab and an aluminum plastic film; the first metal foil and the second metal foil are packaged in an aluminum plastic film, a diaphragm is arranged between the first metal foil and the second metal foil, and the aluminum plastic film is filled with electrolyte; and the first tab and the second tab are positioned outside the aluminum plastic film, are inserted into the aluminum plastic film and are respectively connected with the first metal foil material and the second metal foil material. According to the invention, whether the black spots and damage of the diaphragm cause self-discharge of the battery can be accurately verified, and the influence degree of the black spots and damage of the diaphragm on self-discharge can be quantified.

Description

technical field [0001] The invention relates to the technical field of lithium battery self-discharge testing, in particular to a lithium battery self-discharging testing device and a testing method thereof. Background technique [0002] As a clean and renewable energy device, lithium batteries have been widely used in mobile electronics, new energy vehicles, and energy storage, especially in the field of new energy vehicles. However, there are still many technical problems in lithium batteries that have not been solved, which to a certain extent affect the performance of lithium batteries and the application of lithium batteries. Among them, battery self-discharge is one of the technical problems that need to be solved urgently. The existence of self-discharge phenomenon not only causes the energy loss of the battery itself, but also reduces the life of lithium battery packs and rapidly decays in capacity due to the inconsistency of self-discharge between batteries. [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/48H01M4/13H01M10/052H01M50/533H01M50/536
CPCH01M10/052H01M10/48H01M50/533H01M50/536H01M4/13Y02E60/10
Inventor 张震厉运杰陈虎王利
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY