Electrochemical energy storage device
An electrochemical and energy storage technology, applied in electrode carriers/current collectors, lithium batteries, non-aqueous electrolyte batteries, etc., can solve problems such as limiting the application of energy storage devices, reducing cell rate performance and low temperature performance, and achieving manufacturing costs. The effect of low cost, excellent electrochemical performance, high puncture resistance and safety performance
Active Publication Date: 2015-10-14
GUANGDONG ZHUGUANG NEW ENERGY TECH
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- Description
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Problems solved by technology
However, the current polymer electrolytes often reduce the rate performance and low-temperature performance of the battery, which limits its application in power devices and energy storage devices used in low-temperature environments.
Method used
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Effect test
Embodiment 1
[0031] The difference from Comparative Example 1 is that the thickness of the single-sided negative electrode coating formed after cold pressing is 35.7 μm.
[0032] The rest is the same as the comparative example 1, and will not be repeated.
Embodiment 2
[0034] The difference from Comparative Example 1 is that the thickness of the single-sided negative electrode coating formed after cold pressing is 46 μm.
[0035] The rest is the same as the comparative example 1, and will not be repeated.
Embodiment 3
[0037] The difference from Comparative Example 1 is that the thickness of the single-sided negative electrode coating formed after cold pressing is 61.5 μm.
[0038] The rest is the same as the comparative example 1, and will not be repeated.
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Abstract
The present invention discloses an electrochemical energy storage device, which comprises a positive electrode sheet, a negative electrode sheet, an isolation membrane, an electrolyte and a sealing member, wherein the negative electrode sheet comprises a negative electrode current collector and a negative electrode coating, the thickness of the one-side negative electrode coating is h1, the insulation membrane is arranged between the positive electrode sheet and the negative electrode sheet and the thickness is h2, and the drawing wire length a1 of the negative electrode current collector during cutting overshoot is less than or equal to 1.2*(h1+h2). According to the present invention, when the electrochemical energy storage device using the current collector is abused (the foreign body pierces the electrical core), the negative electrode current collector drawing wire is short (no more than 1.2*(h1+h2)), no or less electronic channels exist between the positive electrode sheet and the negative electrode sheet, and the heat production is less, such that the electrical core has the high anti-piercing safety.
Description
Technical field [0001] The invention belongs to the technical field of electrochemical energy storage devices, and particularly relates to an electrochemical energy storage device. Background technique [0002] In 1991, Japan’s Sony Corporation creatively adopted carbon materials as anode materials for lithium-ion batteries, which brought revolutionary changes to the field of lithium-ion batteries. Since then, lithium-ion battery technology has developed rapidly, in mobile phones, cameras, and notebook computers. And a large number of other portable appliances. Lithium-ion battery has many advantages, such as high voltage, small size, light weight, high specific capacity, no memory effect, no pollution, low self-discharge, long cycle life, etc. It is an ideal power supply for mobile electrical appliances and electric vehicles in the 21st century. Power supply and storage devices for power storage stations. However, the lithium batteries used in electric vehicles (EV) and energy...
Claims
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IPC IPC(8): H01M4/70H01M10/052
CPCH01M4/70H01M10/052Y02E60/10
Inventor 杨玉洁
Owner GUANGDONG ZHUGUANG NEW ENERGY TECH
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