A kind of cylindrical lithium ion battery and design method thereof
A lithium-ion battery and design method technology, applied in the battery field, can solve the problems of small heat dissipation surface area and poor heat dissipation performance, and achieve the effect of ensuring the safety of use and service life, and improving self-heating
Active Publication Date: 2019-03-29
深圳市鹏诚新能源科技有限公司
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Problems solved by technology
However, the existing cylindrical lithium-ion battery has a small heat dissipation surface area compared with the pouch battery, and its own heat dissipation performance is poor.
Method used
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[0017] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0018] The present invention optimizes the design on the basis of analyzing the existing cylindrical lithium-ion battery, adds fins to enhance heat dissipation, and forms the cylindrical lithium-ion battery of the present invention. The temperature change is very small, which ensures the safety and service life. In addition, the battery pack composed of the cylindrical lithium-ion battery of the present invention can simplify or even omit the heat dissipation device of the battery pack due to the good heat dissipation of the battery itself, which improves the overall energy density of the battery pack and reduces the overall cooling cost of the battery pack. Specifically, such as figure 1 As shown, in the cylindrical lithium-ion battery of the present invention, ribs 14 are repackaged outside the shell 12 of the existing cylindrical lithium-...
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Abstract
A cylindrical lithium-ion battery, including a battery cell and several ribs attached to the battery cell, the thickness of the ribs is 0.1-2 mm, the height is 0.5-4 mm, and the distance is 1-3 mm. The overall volume increases by less than 3% relative to the volume of the battery cell, and the design method includes the following steps: determining the heat production Q of the cylindrical lithium-ion battery cell to be optimized 0 ; will produce heat Q 0 As a heat source, the fins added to the battery cell are simulated and analyzed to determine the optimal structure of the fins; and the cell is packaged with the fins of the optimal structure to form the cylindrical lithium-ion battery of the present invention, and the overall volume of the battery is basically zero. Change and greatly improve the self-dissipation of the battery to ensure the safety and service life of the battery.
Description
technical field [0001] The invention relates to storage batteries used in the fields of electric vehicles, energy storage, electric tools, consumer electronics and the like, in particular to a cylindrical lithium-ion battery and a design method thereof. Background technique [0002] With the growing scale of the electric vehicle market, lithium-ion batteries are of great significance as a widely recognized vehicle battery, which has the advantages of long cycle life, high energy density, and low self-discharge rate. As we all know, the performance, life and safety of lithium-ion batteries are closely related to the battery temperature, and the battery temperature is determined by the heat generation and heat dissipation of lithium-ion batteries during operation. If the heat dissipation performance of the lithium-ion battery can be reasonably improved, so that the heat dissipation and heat generation of the lithium-ion battery can be basically balanced, it can effectively avo...
Claims
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IPC IPC(8): H01M10/0525H01M10/058H01M10/613H01M10/655
CPCH01M10/0525H01M10/058H01M10/613H01M10/655Y02E60/10Y02P70/50
Inventor 康健强李博蓝谭祖宪刘贵军
Owner 深圳市鹏诚新能源科技有限公司