Preparation method of ultralow-temperature lithium ion battery
A lithium-ion battery, ultra-low temperature technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of time-consuming and labor-intensive, high preparation cost, and high professional requirements for workers, so as to ensure low-temperature discharge function and improve performance. The effect of stability, labor and time saving
Inactive Publication Date: 2022-01-11
山东银成新能源科技有限公司
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Problems solved by technology
However, in the prior art, the preparation method of ultra-low temperature lithium-ion batteries is cumbersome and complicated, time-consuming and labor-intensive, requires high professionalism of workers, high preparation cost, and has the limitation that the battery performance is not stable enough
However, there is currently no method for the preparation of ultra-low temperature lithium-ion batteries that is simple and improves battery stability.
Method used
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Embodiment 1
[0048] like Figure 1-Figure 4 As shown, the purpose of this embodiment is to provide a method for preparing an ultra-low temperature lithium-ion battery, comprising the following steps:
[0049] S1. Prepare the positive electrode active material, conductive carbon black, carbon nanotubes, binder, and nitrogen methyl pyrrolidone into a slurry according to a certain ratio, and apply the prepared positive electrode slurry on the current collector, and pass through rolling, Slitting and paper sheets to make positive electrode sheets;
[0050] S2, the negative electrode active material, conductive carbon black, carbon nanotubes, antelope methylcellulose thickener, binder and solvent water are formulated into slurry according to a certain ratio, and VGCF is selected and the specific surface area is (2000 ± 500 )㎡ / g of activated carbon is added as an additive, and the slurry is completely obtained by stirring, and the prepared negative electrode slurry is coated on the current coll...
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Abstract
The invention relates to the technical field of ultralow-temperature lithium ion battery preparation, in particular to a preparation method of an ultralow-temperature lithium ion battery. The preparation method comprises the following steps: preparing a positive pole piece, preparing a negative pole piece, welding tabs by adopting ultrasonic waves, separating the positive pole piece and the negative pole piece by using a diaphragm, winding to form a roll core, putting the battery core into the roll core to prepare a battery, injecting a special electrolyte, sealing, forming, preparing the ultralow-temperature battery, testing the performance and the like. The design and preparation process is simple, manpower and time are saved, and the preparation cost of the battery can be effectively reduced; in the aspect of electrolyte, a low-temperature additive based on a fixed solvent system and lithium salt are used, so that normal charging and discharging of the electrolyte at the temperature of -70 DEG C can be ensured, and the performance stability of the ultralow-temperature lithium ion battery is improved; VGCF and activated carbon with the specific surface area of (2000 + / -500) m < 2 > / g are selected as additives and matched positive and negative electrode materials, and a special low-temperature-resistant electrolyte is injected and added, so that the low-temperature discharge function of the lithium battery is ensured, and the lithium battery has the safety and storage functions of a conventional lithium battery.
Description
technical field [0001] The invention relates to the technical field of preparation of ultra-low temperature lithium batteries, in particular to a preparation method of ultra-low temperature lithium ion batteries. Background technique [0002] Lithium-ion batteries are widely used due to their advantages of light weight, high specific energy and long life. Low-temperature lithium batteries are made of special materials and processes, suitable for sub-zero cold environments, and have excellent discharge capacity and working performance. . Lithium-ion batteries are mainly used in power supplies for equipment troops, aviation, aerospace, deep-sea diving equipment, polar scientific research, expedition equipment power supply, frigid rescue, disaster relief power supply, cold-proof clothing, cold-proof shoes power supply lights. However, in the prior art, the preparation method of ultra-low temperature lithium-ion batteries is cumbersome and complicated, time-consuming and labor-...
Claims
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Patent Timeline
Login to View More IPC IPC(8): H01M10/0567H01M10/0585H01M4/62H01M10/0525
CPCH01M10/0567H01M10/0525H01M10/0585H01M4/625Y02E60/10Y02P70/50
Inventor 胡常青赵明李津
Owner 山东银成新能源科技有限公司