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Cell stacks, Li-air secondary stacks

A lamination and cell technology, applied in fuel cell type half cells and primary cell type half cells, etc., can solve the problems of uneven distribution of positive oxygen, weak gas mass transfer ability, poor battery contact, etc., and achieve reliable High performance, good structural stability and uniform gas field distribution

Active Publication Date: 2018-11-06
CHINA AUTOMOTIVE BATTERY RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For lithium-air batteries with large capacity, the design mostly adopts the form of opening holes in the soft package. This design faces problems such as uneven distribution of positive electrode oxygen, weak gas mass transfer capacity, poor internal contact of the battery, and easy flatulence.

Method used

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  • Cell stacks, Li-air secondary stacks
  • Cell stacks, Li-air secondary stacks
  • Cell stacks, Li-air secondary stacks

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] See attached figure 1 And attached figure 2 , taking n=4 as an example, the cell stack provided in Embodiment 1 of the present invention includes a first gas deflector 2a, a second gas deflector 2b, a third gas deflector 2c, and a fourth gas deflector 2d, the first sandwich component, the second sandwich component, the third sandwich component, the first sandwich component is arranged between the first gas deflector 2a and the second gas deflector 2b, the second sandwich component is arranged on the second gas deflector Between the deflector 2b and the third gas deflector 2c, the third interlayer assembly is arranged between the third gas deflector 2c and the fourth gas deflector 2d; the first interlayer assembly, the second interlayer assembly, the first interlayer assembly The three-sandwich assembly includes, from top to bottom, an upper air positive electrode 30, an upper liquid-repellent gas-permeable membrane 29, an upper sealing gasket 28, an upper diaphragm 27...

Embodiment 2

[0064] See attached image 3 , the lithium-air secondary battery stack provided by Embodiment 2 of the present invention includes an upper end plate 1, the cell stack provided by Embodiment 1 of the present invention, and a lower end plate 3. The upper end plate 1 is provided with an upper end plate air passage hole inlet 5, an upper end plate Plate airway hole outlet 6, upper end plate liquid injection hole 7, upper end plate airway hole inlet 5 aligned with airway hole inlet channel 31a-34a-38a-40a, upper end plate airway hole outlet 6 aligned with airway hole outlet channel 31b-34b-38b-40b; the number of liquid injection holes on the upper end plate is the same as that of the liquid injection channels and they are aligned. In this embodiment, the liquid injection holes 7a on the upper end plate are aligned with 11a-32a-36a-39a-41a-43a. The plate liquid injection hole 7b is aligned with 11b-32b-36b-39b-41b-43b; the cell stack is sandwiched between the upper end plate 1 and t...

Embodiment 3

[0069] Processing upper end plate 1, lower end plate 3, the material of this upper end plate 1 lower end plate 3 is plexiglass, components such as graphite gas deflector 2a, 2b, 2c, 2d, graphite gas deflector 2a, 2b, 2c, 2d two The airway grooves 9a-8a-10a of the serpentine flow field are dug on the side surface, the groove depth is 1mm, and the groove width and groove distance are both 2mm. Prepare the upper air positive electrode 30, the lower air positive electrode 21, the upper diaphragm 27, and the lower diaphragm 24. In the embodiment, the upper diaphragm 27 and the lower diaphragm 24 are made of glass fiber, the negative electrode tab 26, the upper sealing gasket 28, and the lower sealing gasket 23. In this embodiment, the upper sealing gasket 28; the lower sealing gasket 23 Made of silica gel, the upper lyophobic and breathable membrane 29, and the lower lyophobic and breathable membrane 22, in this embodiment, the upper lyophobic and breathable membrane 29, and the low...

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PUM

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Abstract

The invention discloses a cell laminated sheet and a lithium air secondary electric pile and belongs to the technical field of batteries. The cell laminated sheet comprises a first gas deflector, a second gas deflector, ..., a number n gas deflector, a first inter-layer component, a second inter-layer component, ... and a number n-1 inter-layer component, wherein the first inter-layer component is arranged between the first gas deflector and the second gas deflector, the second gas deflector is arranged between the second gas deflector and the third gas deflector, ...., and the number n-1 inter-layer component is arranged between the number n-1 gas deflector and the number n gas deflector. The lithium air secondary electric pile comprises an upper end plate, the cell laminated sheet and a lower end plate. The lithium air secondary electric pile formed on the basis of the cell laminated sheet can work normally and can discharge and charge reversibly.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a battery cell stack and a lithium-air secondary battery stack. Background technique [0002] The energy density of the power battery determines the cruising range of the new energy vehicle. The existing lithium-ion battery system has been unable to meet the energy density requirement of more than 500Wh / kg, and the cruising range has become an important factor restricting the promotion of new energy vehicles. Therefore, lithium-air batteries and lithium-sulfur battery systems have become the research hotspots of the new generation of power batteries. Lithium-air batteries have a very high energy density due to the high theoretical specific capacity of 3862mAh / g and the lowest electrochemical potential (-3.04V vs. SHE) due to the negative electrode metal lithium, according to the product Li 2 o 2 According to the mass calculation, its theoretical value can reach 3505Wh / kg, wh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M12/06
CPCH01M12/06
Inventor 赵尚骞张立卢世刚李永伟庄卫东李久铭孙浩博张刚宁杨容
Owner CHINA AUTOMOTIVE BATTERY RES INST CO LTD