Method and system for measuring battery plate surface density based on capacitive transducer

A technology of capacitive sensor and density measurement, which is applied in the direction of electric/magnetic thickness measurement, electromagnetic measuring device, and device for coating liquid on the surface, etc. It can solve the problems of increased production cost, large hysteresis, waste of materials, etc., and achieve production efficiency The effect of improving, improving consistency, and saving materials

Inactive Publication Date: 2013-12-18
UNIV OF JINAN
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Problems solved by technology

[0005] At present, most companies use the method of timing sampling to control the movement of the knife edge. By sampling and measuring the thickness of the pole piece at intervals, this method has a large lag, and the c

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  • Method and system for measuring battery plate surface density based on capacitive transducer
  • Method and system for measuring battery plate surface density based on capacitive transducer
  • Method and system for measuring battery plate surface density based on capacitive transducer

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Embodiment Construction

[0037] The present invention is described in detail below in conjunction with accompanying drawing:

[0038] The surface density of the polar piece is the mass of the positive piece per unit surface, with ρ 面 to express, that is, the formula:

[0039]

[0040] In the formula: m is the mass, S is the area of ​​the pole piece, V is the volume of the pole piece, and ρ is the density of the pole piece.

[0041] It can be seen from the formula that there is a proportional relationship between the surface density value and the thickness d of the pole piece and the density ρ of the pole piece material. It can be seen from the formula of the surface density value that the measurement of the surface density not only needs to measure the thickness d, but also measures the density ρ of the pole piece material, and the measurement of the capacitive sensor 5 in this system can meet the above requirements. The ideal model of the capacitive sensor 5 probe and the lower plate is a parall...

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Abstract

The invention discloses a method and a system for measuring the battery plate surface density based on a capacitive transducer. The measuring system comprises a surface density measuring device, wherein the surface density measuring device is connected with a data processing circuit connected with a PLC (Programmable Logic Controller), and comprises a scanning frame which is a 'C' type scanning frame, and a reciprocating device which is used for driving the scanning frame; a probe of the capacitive transducer and a bottom smooth metal plate are respectively mounted on the upper and lower scanning arms of the scanning frame. According to the invention, the traditional off-line measurement mode is changed, so that the production efficiency is improved greatly, the survey accuracy and the consistency of product quality are improved, materials are saved, the cost is saved, and uniform control over the surface density of a battery plate is realized.

Description

technical field [0001] The invention relates to a method and system for measuring the surface density of battery pole pieces based on a capacitance sensor. Background technique [0002] With the continuous development of notebook computers, mobile communications, electric scooters and other fields, the demand for lithium batteries is also increasing, and the quality requirements for lithium batteries are also increasing. The coating production of battery pole pieces is the first link in battery production, and the uniformity of surface density in coating production is the key condition for improving the quality consistency of lithium-ion batteries. [0003] At present, domestic battery pole piece manufacturers mostly adopt the traditional off-line measurement method for the surface density measurement of the pole piece, that is, the staff takes standard-sized samples from the pole piece production line, and indirectly obtains the surface density value by weighing. This off-...

Claims

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Application Information

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IPC IPC(8): B05C11/02G01B7/06
Inventor 孙选朱国栋艾长胜李国平
Owner UNIV OF JINAN
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