Method for monitoring surface density of coating quantity of lithium ion battery pole piece
A lithium-ion battery and coating amount technology, which is applied to battery electrodes, circuits, coatings, etc., can solve the problems of pole piece scrapping, affecting the company's production cost, and inaccurate detection of pole piece coating amount, so as to save costs, Accurately displayed effect
Active Publication Date: 2012-12-05
力神电池(苏州)有限公司
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[0004] From the above situation, we can see that the accuracy of the NDC monitoring device determines the quality of the pole piece. Once the stability of the NDC monitoring device is not good, it will cause a large number of pole pieces to be scrapped due to unqualified coating, which will seriously affect the company. production cost
The factors affecting the accuracy of the NDC monitoring device are mainly due to the fluctuation of the surface density of the substrate itself, which eventually leads to inaccurate detection of the coating amount of the pole piece, and in severe cases, a large number of pole pieces will be scrapped
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[0022] Hereinafter, the method for monitoring the surface density of the coating amount of the lithium ion battery pole piece of the present invention will be described in detail with reference to the embodiments and the drawings.
[0023] The method for monitoring the areal density of the coating amount of the pole piece of the lithium ion battery of the present invention utilizes the function of the coating amount measuring instrument itself, and changes the setting of the internal parameters of the instrument, so as to realize the change of the surface density of the pole piece substrate and the coating The monitoring of the measuring surface density and the parameter setting of the coating quantity measuring instrument include the following steps:
[0024] 1) Set the measurement factor to 1, the measurement constant to 0, and the display value of the surface density of the substrate measured by the coating amount measuring instrument is a;
[0025] 2) Set the metering constant to...
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The invention discloses a method for monitoring surface density of coating quantity of a lithium ion battery pole piece. In the method, the setting of internal parameters of a coating quantity measuring apparatus are changed by utilizing the functions of the coating quantity measuring apparatus, so that the surface density change of a pole piece base material and the surface density of the coating quantity can be monitored. The parameter setting of the coating quantity measuring apparatus comprises the following steps of: setting a measuring factor as 1 and a measuring constant as 0 and measuring the surface density of the base material by using the coating quantity measuring apparatus to obtain a display value of a; setting the measuring constant as -a and measuring the surface density of the base material by using the coating quantity measuring apparatus to obtain a display value of b; sampling and measuring the surface density c of the actual coating quantity; calculating to obtaina new measuring factor d equal to c / b and a new measuring constant equal to -a / d; resetting a measuring factor as d and a measuring constant as e so as to set the parameters for measuring the surfacedensity value of the base material coating layer. By the method, cost is saved to the maximum extent, the change of the surface density of the pole piece base material can be monitored in real time, and the variation value of the surface density of the coating quantity can be displayed accurately.
Description
Technical field [0001] The invention relates to a method for monitoring the coating amount of battery pole pieces. In particular, it relates to a method for monitoring the surface density of a lithium ion battery pole piece coating amount that can monitor the surface density of a pole piece substrate in real time. Background technique [0002] Lithium-ion batteries have the advantages of high voltage, high specific energy, many cycles of use, and long storage time. They are not only widely used in portable electronic devices such as mobile phones, digital cameras and laptop computers, but also widely used in electric vehicles and electric vehicles. For large and medium-sized electric equipment such as bicycles and power tools, the performance requirements of lithium-ion batteries are becoming higher and higher. [0003] In the normal production process of the pole piece coating machine, the NDC monitoring device is usually used to monitor the amount of coating on the surface of th...
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IPC IPC(8): B05C11/02H01M4/139G01N9/00
CPCY02E60/12Y02E60/122Y02E60/10
Inventor 张永村郭忠国宋红武孙伟
Owner 力神电池(苏州)有限公司