Reference electrode implantation method and three-electrode cell
A reference electrode, three-electrode technology, applied in the field of reference electrode implantation method and three-electrode battery, can solve the problems of voltage error, bad, measurement result error, etc.
Active Publication Date: 2022-05-06
TSINGHUA UNIV
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Problems solved by technology
However, the external reference electrode is prone to poor infiltration, resulting in voltage errors
Even if the infiltration problem of the reference electrode is solved by adding additional electrolyte, there is still too long a conduction distance between the measurement point of the external reference electrode and the target measurement position, which leads to poor tracking ability of the measurement potential to the target measurement potential, which brings the measurement results big error
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[0038] In order to make the above-mentioned purpose, features and advantages of the present application more obvious and understandable, the specific implementation manners of the present application will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the application. However, the present application can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific implementation disclosed below.
[0039] It can be understood that the terms "first", "second" and the like used in this application may be used to describe various elements herein, but these elements are not limited by these terms. These terms are only used to distinguish a...
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The application relates to a reference electrode implantation method and a three-electrode battery. Including providing batteries to be implanted. The battery to be implanted includes a casing and a winding core structure arranged in the casing. The winding core structure includes at least one layer of electrode sheet. Perforating the electrode sheet close to the casing in the winding core structure to form a through-hole structure. Prepare the reference electrode. The reference electrode includes a microporous exposed area. The reference electrode is fixedly placed outside the roll core structure, wherein the micropore exposed area covers the through hole structure, so as to complete the implantation of the reference electrode. The reference electrode implantation method provided by this application avoids the influence of the size of the reference electrode itself on the deintercalation of lithium in the active material during charging and discharging, and realizes the accurate measurement of the electrode potential and impedance of the reference electrode without affecting the dynamic performance of the battery. , Long life measurement.
Description
technical field [0001] The present application relates to the field of battery testing, in particular to a reference electrode implantation method and a three-electrode battery. Background technique [0002] The reference electrode is an effective tool to obtain the internal operating state and health state of the battery during actual operation. The reference electrode is generally made of a material that has a stable potential in the battery. Commonly used reference electrode materials include: lithium metal, lithium iron phosphate, lithium titanate and other materials. These materials are adjusted to a steady-state potential and then welded to conductive tabs to form reference electrodes and implanted into the battery. By measuring the potential of the positive and negative electrodes relative to the reference electrode during battery operation, the potential and impedance information of a single electrode can be obtained. [0003] The mold cell has a dedicated install...
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IPC IPC(8): G01N27/49G01N27/416H01M10/48
CPCG01N27/49G01N27/4166H01M10/48Y02E60/10
Inventor 李亚伦卢兰光冯旭宁杜玖玉韩雪冰欧阳明高李建秋
Owner TSINGHUA UNIV