Ray sensor for detecting surface density of pole piece of lithium ion battery

A lithium-ion battery and density detection technology, which is applied in the field of radiation sensors, can solve the problems that are only suitable for static measurement, large time constant, and the sensor cannot meet fast online measurement, etc., and achieve the effect of fast detection of radiation intensity and fast and accurate surface density

Active Publication Date: 2012-11-07
NINGDE AMPEREX TECH +1
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Problems solved by technology

For this kind of circuit, its time constant is very large, and the sensor it constitutes cannot meet the fast online measurement, and is only suitable for static measurement

Method used

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  • Ray sensor for detecting surface density of pole piece of lithium ion battery
  • Ray sensor for detecting surface density of pole piece of lithium ion battery
  • Ray sensor for detecting surface density of pole piece of lithium ion battery

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Embodiment Construction

[0027] In order to make the object, technical solution and beneficial technical effects of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific implementations described in this specification are only for explaining the present invention, not for limiting the present invention.

[0028] see figure 1 , a kind of ray sensor that is used for detection of surface density of lithium-ion battery electrode sheet provided by the present invention comprises high-pressure ionization chamber 1, high-voltage module, preamplifier 2, gain adjustment circuit 3, filter circuit 4 and voltage-current conversion circuit 5 , the preamplifier 2 includes an operational amplifier Ap and a feedback network, the output of the high-pressure gas ionization chamber 1 is electrically connected to the negative input of the operational amplifier Ap, the ...

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Abstract

The invention belongs to the technical field of detection equipment, and particularly relates to a ray sensor for detecting the surface density of a pole piece of a lithium ion battery. The ray sensor comprises a high-pressure ionization chamber, a high-voltage module, a preamplifier, a gain control circuit, a filter circuit and a voltage-current conversion circuit, the preamplifier comprises an operational amplifier and a feedback network, filling gas is filled in the high-pressure ionization chamber and is xenon or krypton or mixed gas containing xenon and carbon oxide gas or mixed gas containing krypton and carbon oxide gas, and the feedback network is a double-T-shaped feedback capacitance-resistance network. Compared with the prior art, the filling gas is quite sensitive to beta rays, gamma rays and X-rays, and a reliable and stable signal source is provided for the sensor; and the amplification factor of the preamplifier is increased while the time constant of the preamplifier is reduced owing to the double-T-shaped feedback capacitance-resistance network, so that the ray sensor quickly and accurately measure the surface density of the pole piece of the lithium ion battery in an online and non-contact manner.

Description

technical field [0001] The invention belongs to the technical field of detection equipment, and in particular relates to a ray sensor used for detection of surface density of lithium-ion battery pole pieces. Background technique [0002] The amount of active material coated on the battery pole piece directly affects important indicators such as the capacity and safety of the finished battery. When the quality of the active material on the cathode pole piece does not match the quality of the active material on the anode pole piece, it is very easy to produce lithium precipitation during the charging process, which brings serious safety hazards. Therefore, in the production process of lithium-ion battery pole pieces, it is necessary to monitor their areal density in real time to monitor product quality and improve consistency, and prevent the occurrence of lithium precipitation. [0003] The traditional monitoring method is that employees hold a screw micrometer to dynamicall...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/66
Inventor 王顺坤贾宝安
Owner NINGDE AMPEREX TECH
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