Cell and secondary battery comprising same
A battery cell and negative electrode technology, applied in the field of secondary batteries, can solve the problems of small improvement, difficult to meet the actual use requirements of portable electronic products, new energy vehicles, etc., and achieve the effects of long cycle life, high energy efficiency and good safety.
Active Publication Date: 2018-11-23
CONTEMPORARY AMPEREX TECH CO
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Problems solved by technology
Although these measures have a certain improvement effect on the improvement of battery charging capacity, the degree of improvement is small, and it is difficult to meet the actual use needs of portable electronic products and new energy vehicles.
Method used
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[0008] The battery cell and the secondary battery including the battery cell according to the present application will be described in detail below.
[0009] Firstly, the battery cell according to the first aspect of the present application will be described.
[0010] The cell according to the first aspect of the present application includes a positive pole piece, a negative pole piece and a separator, the positive pole piece includes a positive current collector coated with a positive membrane layer region and a positive tab connected to the positive current collector, The negative electrode sheet includes a negative electrode collector coated with a negative electrode film layer and a negative electrode tab connected to the negative electrode collector, and the separator is arranged between the positive electrode sheet and the negative electrode sheet. Wherein, the negative pole piece satisfies the relational formula: 0.04≤(L 1 ×ρ1) / (N 1 ×N 1 ×W 1 ×H 1 )≤2.50.
[0011]...
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Abstract
The invention provides a cell and a secondary battery comprising the same. The cell comprises a positive pole piece, a negative pole piece and an isolating film; the positive pole piece comprises a positive electrode current collector coated in a positive pole film sheet layer region, and a positive electrode tab connected with the positive electrode current collector; the negative pole piece comprises a negative electrode current collector coated in a negative pole film sheet layer region, and a negative electrode tab connected with the negative electrode current collector; and the isolatingfilm is arranged between the positive pole piece and the negative pole piece, wherein the negative pole piece satisfies a relation that (L1*rho1) / (N1*N1*W1*H1) is greater than or equal to 0.04 and less than or equal to 2.50. The charging capacity of the battery can be greatly improved, and the internal resistance of the battery can be reduced, and meanwhile, it is ensured that the battery also hasthe characteristics of low heat production, high energy efficiency, high safety and long cycle life.
Description
technical field [0001] The present application relates to the field of energy storage, in particular to an electric cell and a secondary battery including the electric cell. Background technique [0002] With the development of portable electronic products and new energy vehicles, people put forward higher requirements on the charging speed of batteries, which requires further improvement of the charging capacity of batteries. In the prior art, a lot of research has been done to improve the charging capacity of the battery. For example, by reducing the particle size of the positive and negative active material particles and coating and doping the positive and negative active material particles, the positive and negative electrodes can be improved. The conductivity and crystal structure stability of the active material particles increase the speed of ion extraction and insertion between the positive and negative electrodes; the use of low-viscosity electrolytes increases the ...
Claims
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Login to View More IPC IPC(8): H01M4/13H01M4/70H01M10/058
CPCH01M4/13H01M4/70H01M10/058Y02E60/10Y02P70/50
Inventor 杜鑫鑫骆福平王升威覃炎运张漫芳
Owner CONTEMPORARY AMPEREX TECH CO