Preparation method of small-specification tab-free lithium ion battery
A lithium-ion battery and small-scale technology, which is applied in the field of preparation of small-scale electrodeless ear lithium-ion batteries, can solve the problem that the discharge power of the battery cell cannot match the requirements of the use of tools, and achieves reduction of physical internal resistance, reduction of heat generation, and improvement of electrical conductivity. Effect
Pending Publication Date: 2022-04-29
无锡市明杨新能源股份有限公司
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[0005] Purpose of the invention: The purpose of the present invention is to provide a preparation method of a small-sized electrodeless lithium ion battery, which can improve the internal conduction efficiency of the battery core, reduce physical polarization, and improve the electrical conductivity uniformity of the current collector inside the battery core, reduce heat generation, and solve the problem of In the application of ultra-high power output of lithium-ion batteries, the discharge power of the batteries cannot match the requirements of the tool, and there are no difficulties and safety hazards in the production process of multi-pole batteries.
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[0025] The present application will be further elaborated below in conjunction with specific embodiments.
[0026] In this embodiment, taking a battery of the type 18650-2000mAh as an example, the following steps are used for preparation:
[0027] S1: preparing a paste-like substance applied to the positive electrode and a paste-like substance applied to the negative electrode;
[0028] S2: if figure 1 As shown, for the positive electrode coating, the coating width is 56.5±0.2mm, and an empty aluminum foil with a width of 2.5±0.2mm is reserved at the edge of the positive electrode, and the coating width and the empty aluminum foil width are accurately controlled by slit post-coating;
[0029] S3: Using the method in S2, for the negative electrode coating, the coating width is 57.5±0.2mm, and an empty copper foil with a width of 2.5±0.2mm is reserved on the edge of the negative electrode, and the coating width and empty space are accurately controlled by slit post coating The...
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Abstract
The invention discloses a preparation method of a small-specification tab-free lithium ion battery, which is characterized in that the preparation method of a tab-free battery cell is applied to the preparation of the small-specification lithium ion battery, so that the internal conductive efficiency of the battery cell can be improved, the physical polarization can be reduced, the conductive uniformity of a current collector in the battery cell can be improved, and the heating can be reduced; the problem that the discharge power of a battery cell cannot be matched with the use requirement of a tool in the application of ultrahigh power output of a lithium ion battery is solved, and meanwhile, the problems of difficulty and potential safety hazards in the manufacturing process of a multi-tab battery cell do not exist.
Description
technical field [0001] The invention relates to the field of lithium-ion battery preparation, in particular to a preparation method of a small-sized non-tab lithium-ion battery. Background technique [0002] Cordless power tools are more and more widely used in professional engineering fields at home and abroad. Because of the use of rechargeable lithium-ion batteries as power sources, although they are convenient to use, they cannot completely replace wired communication tools in many fields that require high power output. However, in many application scenarios such as outdoor work and high-altitude work, the length limitation of the power cord has caused a lot of inconvenience. Therefore, in the field of special power tools that require high power output, the ultra-high current discharge performance of lithium-ion batteries is particularly important. Although the increase in the number of tabs inside the cell can improve the physical conduction efficiency, the tabs of the...
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IPC IPC(8): H01M10/0587H01M10/0525H01M50/536H01M50/548H01M50/559H01M50/566H01M10/04
CPCH01M10/0587H01M10/0525H01M50/536H01M50/548H01M50/559H01M50/566H01M10/0422Y02P70/50
Inventor 钱胜利宋峰杨礼华
Owner 无锡市明杨新能源股份有限公司