Method and device for testing electrode sheet infiltration of secondary battery
A technology of immersion testing and secondary batteries, which is applied in the direction of measuring devices, instruments, surface/boundary effects, etc., can solve problems such as large errors, limited battery design failure analysis, lack of characterization methods and experience, and reduce test results error, improve test work efficiency, and avoid adverse effects
Active Publication Date: 2021-11-09
CONTEMPORARY AMPEREX TECH CO
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Problems solved by technology
[0003] However, the current industry is still quite lacking in the means and experience of characterization of the liquid absorption capacity of the pole piece. The commonly used method is to observe the diffusion area by dropping the electrolyte or soak the electrolyte to weigh. During the operation of the two methods, the electrolyte will evaporate These factors have a great impact on the results, and the error is large, which greatly limits the development of material selection and failure analysis in the battery design process.
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[0049] Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings and examples. The detailed description and drawings of the following embodiments are used to illustrate the principle of the present invention, but not to limit the scope of the present invention, that is, the present invention is not limited to the described embodiments.
[0050]In the description of the present invention, it should be noted that unless otherwise specified, the meaning of "plurality" is two or more; the terms "upper", "lower", "left", "right", "inner ", "outside" and other indicated orientations or positional relationships are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the inv...
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The invention relates to a method and a device for testing the infiltration of a pole piece of a secondary battery. The pole piece soaking test method of the secondary battery comprises the following steps: (a) using a micro sampler to absorb a predetermined amount of electrolyte; (b) contacting the micro sampler with the pole piece to be tested, and the pole piece to be tested absorbs the liquid under capillary action. Electrolyte in the micro sampler; (c) After a predetermined time period, record the amount of electrolyte absorbed in the micro sampler, and quantitatively calculate the final absorption rate of the pole piece to be tested according to the ratio of the absorbed amount and the predetermined time period. The pole piece infiltration test method of the secondary battery in the embodiment of the present invention can effectively improve the test result accuracy of the electrolyte absorption rate of the pole piece to be tested.
Description
technical field [0001] The invention relates to the technical field of testing equipment, in particular to a method and device for testing the infiltration of a pole piece of a secondary battery. Background technique [0002] In the field of batteries, lithium batteries are widely used in portable electronic products such as computers and mobile phones due to their high output voltage, high specific capacity, and high safety. ) of the dominant power supply. With the improvement of user requirements, the requirements for the energy density of lithium-ion batteries are also getting higher and higher, and the research and development of electrode materials and the design and development of batteries have become more important. The electrolyte absorption capacity of the pole piece included in the battery core is closely related to the dynamics, cycle life, safety and reliability of the battery core, and understanding the liquid absorption capacity of the pole piece is very impo...
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IPC IPC(8): G01N13/00
CPCG01N13/00
Inventor 张馨元魏奕民侯志强兰启宁龚雪清
Owner CONTEMPORARY AMPEREX TECH CO