Electrochemical device and electronic device
An electronic device and electrochemical technology, applied to electrochemical generators, circuits, electrical components, etc., can solve the problems of uneven heating, low temperature, and excessive heat dissipation of batteries
Active Publication Date: 2021-09-21
NINGDE AMPEREX TECH
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Problems solved by technology
[0007] The above-mentioned heating sheet is provided with a first body part and a second body part with a higher resistance value per unit area, and the width of the first body part close to the battery core is set direction, so that the second main body is closer to the middle of the battery cell relative to the first main body, so that the heating ability of the first main body to the edge of the battery cell is higher than that of the second main body to the middle of the battery cell, and thus to the battery The core is heated unevenly to solve the problem of more heat dissipation and lower temperature at the edge of the cell than in the middle of the cell, and improve the overall temperature distribution of the cell
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[0043] The following will describe the technical solutions of the present application with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are only part of the embodiments of the present application, not all of them.
[0044] It should be noted that when a component is said to be "fixed" to another component, it can be directly on the other component or there can also be an intervening component. When a component is said to be "connected" to another component, it may be directly connected to the other component or there may be intervening components at the same time. When a component is said to be "set on" another component, it may be set directly on the other component or there may be an intervening component at the same time. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for purposes of illustration only.
[0045] Unless otherwise defined, all technical...
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An electrochemical device comprises a battery cell and a shell for accommodating the battery cell, and further comprises a heating sheet, wherein the heating sheet is arranged in the shell and used for heating the battery cell; in the width direction of the heating sheet, the heating sheet sequentially comprises a first main body part and a second main body part electrically connected with the first main body part, the first main body part is close to the edge of the battery cell in the width direction, and a unit area resistance value of the first main body part is 5%-10% higher than that of the second main body part. Through the arrangement, the heating capacity of the first main body part is higher than that of the second main body part, so that the battery cell is non-uniformly heated, the problems that the edge of the battery cell radiates much heat and the temperature is low compared with the middle part of the battery cell are solved, and the overall temperature distribution of the battery cell is improved. An electronic device comprises the electrochemical device.
Description
technical field [0001] The present application relates to an electrochemical device and an electronic device. Background technique [0002] At present, the market has put forward higher requirements for the endurance and charging speed of lithium-ion batteries, but the disadvantages of fast power consumption and slow charging of lithium-ion batteries under low temperature conditions have become a major pain point of existing lithium-ion batteries. Therefore, it is urgent to develop a technology to realize fast charging of lithium-ion batteries under low temperature conditions. [0003] At present, the methods for improving fast charging of lithium-ion batteries mainly focus on improving the chemical system and battery structure design, but this will cause a sharp increase in manufacturing costs, and another method to improve the endurance and charging capacity of lithium-ion batteries at low temperatures It is to fill a controllable heat source inside the battery or battery...
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Login to View More IPC IPC(8): H01M10/615H01M10/617H01M10/654H01M10/6571H01M10/6551H01M10/6554H01M10/0525
CPCH01M10/615H01M10/617H01M10/654H01M10/6571H01M10/6551H01M10/6554H01M10/0525Y02E60/10
Inventor 曹维毅魏红梅
Owner NINGDE AMPEREX TECH