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Lithium battery reference electrode structure and measuring method thereof

A reference electrode and lithium battery technology, applied in lithium batteries, secondary batteries, measuring device casings, etc., can solve problems such as difficulty in ensuring consistency, inability to reflect in real time, complicated operation, etc., to achieve stable collection, heavy workload, high precision effect

Pending Publication Date: 2022-04-12
湖南领湃科技股份有限公司 +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] According to past experience, the positive and negative electrodes can be tested separately by disassembling the battery cell and then assembling it into a half-cell or a symmetrical battery, but this method is complicated to operate, heavy in workload, and difficult to guarantee consistency
And it cannot reflect in real time, the potential change and impedance change during battery charge and discharge

Method used

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  • Lithium battery reference electrode structure and measuring method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0039] 1. Before battery assembly, pre-embed the reference electrode assembly into the electrode assembly.

[0040] 2. For the reference electrode mentioned above, wrap the reference electrode with a single isolation film and embed it. The diameter of the enamelled copper wire in the reference electrode assembly is 30-50um, and the number of enamelled copper wires is 4-8 twisted together. The enamelled layer is made of PAI material (polyamideimide) and coated with lithium The length of the metal part is 0.5cm-1.5cm. The thickness of the isolation membrane used is 9um-12um, and the porosity is above 40%.

[0041] 3. The sealing nail in the above-mentioned reference electrode assembly has a groove on its large circular surface and a hole in the center of the groove, wherein the diameter of the groove is 2-3mm, the depth is 0.5-1mm, and the diameter of the hole is 0.5mm-1mm.

[0042] / 4. The injection molded part in the above reference electrode assembly is made of polyphenylen...

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Abstract

The invention relates to a structure of a lithium battery reference electrode, belongs to the technical field of lithium battery measuring devices, and solves the technical problem of trouble in testing the charging and discharging performance of a lithium battery by a product in the prior art. The lithium battery comprises an electrode assembly, the electrode assembly comprises a negative plate and a diaphragm, the lithium battery comprises a varnished metal wire and a fixing assembly, one end of the varnished metal wire wraps an insulating film and is embedded between the negative plate and the diaphragm in the electrode assembly, the varnished metal wire penetrates through the fixing assembly in a sealing mode, and an extending section is reserved at the other end of the varnished metal wire; and one end of the enameled metal wire is electrically connected with the testing device, so that the change of the potential of the positive electrode and the negative electrode of the lithium battery in the charging and discharging processes can be monitored in time. The structure is simple, and the charging and discharging performance of the lithium battery is easy to test.

Description

technical field [0001] The invention belongs to the technical field of lithium battery measuring charging and discharging structures, and in particular relates to a structure of a lithium battery reference electrode. Background technique [0002] Lithium-ion power batteries have become a key technology restricting the development of electric vehicles. When developing prismatic ion batteries, it is necessary to monitor the potential of the positive and negative electrodes and the increase in cell impedance, and to explore whether the contribution of the positive electrode or the increase in the impedance of the negative electrode is the main contribution. [0003] According to past experience, the positive and negative electrodes can be tested separately by disassembling the battery cells and then assembling them into half-cells or symmetrical batteries. However, this method is complicated to operate, heavy in workload, and difficult to guarantee consistency. And it cannot r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/48H01M10/052H01M10/058G01R1/04
CPCY02E60/10Y02P70/50
Inventor 金虎权卜雪涛
Owner 湖南领湃科技股份有限公司
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