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Slurry filtration system used for power lithium ion battery of HEV/PHEV

A lithium-ion battery and filtration system technology, applied in the direction of filtration separation, filtration circuit, separation method, etc., can solve the problems of a large number of scratches or streaks on the coating surface, particle size that cannot meet the requirements, and is not suitable for filtration, etc., to avoid coating Scratches or streaks on the coated surface, easy to scale production, and avoid clogging

Active Publication Date: 2018-08-14
WANXIANG 123 CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing battery slurry filtration system is not suitable for filtering HEV / PHEV power lithium-ion battery slurry, which is easy to block the screen, and at the same time, the particle size after filtration is too large to meet the requirements, which may easily cause blockage of the coating head and coating surface The problem of producing a large number of scratches or streaks, the purpose of the present invention is to provide a slurry filtration system for power lithium-ion batteries that can effectively filter the slurry to a HEV / PHEV with a suitable particle size range

Method used

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  • Slurry filtration system used for power lithium ion battery of HEV/PHEV
  • Slurry filtration system used for power lithium ion battery of HEV/PHEV
  • Slurry filtration system used for power lithium ion battery of HEV/PHEV

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Embodiment 2

[0026] A slurry filtration system for power lithium-ion batteries of HEV / PHEV, such as the slurry filtration system used to filter the slurry required for the negative electrode sheet in the power ion battery of PHEV, differs from Example 1 in that the ultrasonic The power is 23 KHz, the output power is 7 KW, the ultrasonic time is 22 min, and the interval time is 160 min. The particle size distribution of the filtered slurry is: D10≤5 µm, D50≤6.7 µm, D90≤13.0 µm, and The particle size of the 10% volume slurry is 13.0-19.8 µm, fully meeting the application requirements.

Embodiment 3

[0028] A slurry filtration system for HEV / PHEV power lithium-ion batteries, such as a slurry filtration system for filtering the slurry required for the positive electrode sheet of HEV power ion batteries, wherein the particle size volume distribution of the original slurry is: D10≤ 7 µm, D50≤14 µm, D90≤25 µm, the particle size of the remaining 10% of the volume of the slurry is 25 µm to 35 µm, and the maximum particle size is 35 µm, because the thickness of the negative electrode sheet is required to be a single layer of 30 µm, so it is required The maximum particle size after filtration should not exceed 30 µm. Such as image 3As shown, the slurry system includes a slurry flow pipeline, in which there are three filters 1 connected in series in order of filter pore size from large to small, wherein the first filter is equipped with a 180 µm sieve 11. There is a 75 µm sieve in the second filter 13, five 48 µm sieves in parallel in the third filter, and a depth filter group co...

Embodiment 4

[0030] A slurry filtration system for a HEV / PHEV power lithium ion battery, such as a slurry filtration system for filtering the slurry required for the positive electrode sheet of a PHEV power ion battery, differs from Example 3 in that the power of the ultrasonic It is 30 KHz, the output power is 12 KW, the ultrasonic time is 25 min, and the interval time is 180 min. The particle size volume distribution of the filtered slurry is: D10≤5.5 µm, D50≤9.2 µm, D90≤17.0 µm, and the remaining The particle size of the 10% slurry by volume is 17.0 µm to 28.4 µm, fully meeting the application requirements.

[0031] The HEV / PHEV power lithium ion battery slurry filtering system of the present invention can effectively solve the existence of large particles in the slurry, avoid blocking the filter screen during filtering, affect the normal production of lithium ion battery slurry, and improve production efficiency.

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Abstract

The invention relates to the technical field of production of power lithium ion batteries, and particularly discloses a slurry filtration system used for a power lithium ion battery of HEV / PHEV. The system comprises a slurry flowing pipeline, a plurality of filters connected in series are arranged in the slurry flowing pipeline, the filters are in sequential connection according to a descending order of filter pore sizes, and a slurry flowing direction is formed; and the interior of each filter is provided with one screen or two or more parallel screens, a depth-type filter group is connectedin series with the tail end of the slurry flowing direction, the interior of the depth-type filter group is provided with a plurality of parallel filter elements, and the filter pore size of each filter element is smaller than the filter pore size of the screen. The system provided by the invention filters slurry until the particle size of the slurry is in a suitable range in a classified filtration manner, so that clogging of the screen is effectively avoided, the filtration process has high stability, and requirements for particle miniaturization of the slurry used for the lithium ion battery of the HEV or the HPEV are met; and filter screens with any specifications can adopted for free combination, which is flexible and convenient, and the system is convenient to assemble and disassemble, and convenient for large-scale production.

Description

technical field [0001] The invention relates to the technical field of power lithium ion battery production, in particular to a filter system for filtering slurry for power lithium ion batteries in HEV / PHEV. Background technique [0002] At present, with the rapid development of power lithium-ion batteries, especially power lithium-ion batteries for HEV / PHEV, the requirements for the discharge rate of the battery cells are getting higher and higher, so the thickness of the pole piece coating is required to be thinner and thinner, which is more beneficial High rate charge and discharge. The thinning of the coating thickness requires that the slurry can be effectively filtered, so as to ensure that the particle size of the particles in the slurry is within the specification range. The existing lithium-ion battery slurry filtration system is mainly used for the preparation of slurry for EV power batteries with a single-layer coating thickness of 100-300 μm on the pole piece. ...

Claims

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Application Information

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IPC IPC(8): B01D36/02
CPCB01D36/02
Inventor 苏文俊李凡群杜小红赵星星
Owner WANXIANG 123 CO LTD
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