Vanadium battery spliced conductive plastic bipolar plate

A technology of conductive plastics and bipolar plates, applied in the field of vanadium batteries, can solve the problems of increased leakage current, decreased energy efficiency of stacks, and increased consumption of conductive bipolar plates, etc.

Active Publication Date: 2020-10-23
杭州德海艾科能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The bipolar plate has the function of separating the positive and negative electrolytes. The contact of the bipolar plate outside the reaction zone with the electrolyte will increase the leakage current, reduce the energy efficiency of the stack, and even cause a short circuit inside the stack.
Use a conductive bipolar plate to separate the positive and negative electrolytes in the non-reactive area, which increases the amount of conductive bipolar plates, thereby increasing the material cost of the system

Method used

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  • Vanadium battery spliced conductive plastic bipolar plate
  • Vanadium battery spliced conductive plastic bipolar plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A vanadium battery spliced ​​conductive plastic bipolar plate, the preparation process is as follows:

[0025] The components of conductive plate 1: polypropylene PP 20%, carbon black 50%, graphite 10%, EVA 20%.

[0026] Non-conductive board 2 components: polypropylene PP 60%, silica 30%, EVA 10%.

[0027] Preparation of conductive plate 1 and non-conductive plate 2: weigh the above raw materials and mix them evenly at high speed in a high-speed mixer, and prepare conductive plate 1 and non-conductive plate 2 on a sheet extrusion molding machine. The thickness of the square plate structure 11 of the conductive plate 1 is 1 mm, the thickness of the protruding strip structure 12 is 0.3 mm, and the thickness of the non-conductive plate 2 is 0.35 mm.

[0028] Preparation of spliced ​​bipolar plates: Place a non-conductive plate 2 on the upper and lower surfaces of the protruding strip structure 12 of the conductive plate 1, put it in the hot melt device, set the temperature at 140°...

Embodiment 2

[0030] A vanadium battery spliced ​​conductive plastic bipolar plate, the preparation process is as follows:

[0031] The components of the conductive plate 1: polyethylene PE 25%, carbon black 48%, conductive graphite 10%, carbon nanotubes 2%, POE 10%, EVA 5%.

[0032] The components of non-conductive board 2: polyethylene PE 75%, titanium dioxide 20%, POE 5%.

[0033] Preparation of conductive plate 1 and non-conductive plate 2: weigh the above raw materials and mix them evenly at high speed in a high-speed mixer, and prepare conductive plate 1 and non-conductive plate 2 on a sheet extrusion molding machine. The thickness of the square plate structure 11 of the conductive plate 1 is 2 mm, the thickness of the protruding strip structure 12 is 0.3 mm, and the thickness of the non-conductive plate 2 is 0.85 mm.

[0034] Preparation of spliced ​​bipolar plates: Place a non-conductive plate 2 on the upper and lower surfaces of the protruding strip structure 12 of the conductive plate 1, ...

Embodiment 3

[0036] A vanadium battery spliced ​​conductive plastic bipolar plate, the preparation process is as follows:

[0037] The components of conductive plate 1: polypropylene PP 15%, carbon black 50%, conductive graphite 28%, graphene 2%, SBS 5%.

[0038] Non-conductive board 2 components: polypropylene PP 60%, silicon dioxide 20%, silicate 10%, SBS 10%.

[0039] Preparation of conductive plate 1 and non-conductive plate 2: weigh the above raw materials and mix them evenly at high speed in a high-speed mixer, and prepare conductive plate 1 and non-conductive plate 2 on a sheet extrusion molding machine. The thickness of the square plate structure 11 of the conductive plate 1 is 3 mm, the thickness of the protruding strip structure 12 is 1 mm, and the thickness of the non-conductive plate 2 is 1 mm.

[0040] Preparation of spliced ​​bipolar plates: Place a non-conductive plate 2 on the upper and lower surfaces of the protruding strip structure 12 of the conductive plate 1, put it into the h...

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Abstract

The invention relates to a vanadium battery spliced conductive plastic bipolar plate, which comprises a conductive plate and a non-conductive plate, wherein the conductive plate covers an electrochemical reaction area and makes contact with electrolyte in the electrochemical reaction area; the non-conductive plate covers an electrolyte flow channel area and makes contact with electrolyte in an electrolyte flow channel area; the conductive plate is a polymer resin material plate added with a conductive agent, the non-conductive plate is a polymer resin material plate added with a non-conductivematerial, and polymer resin in the conductive plate and polymer resin in the non-conductive plate are the same polymer resin; and the conductive plate and the non-conductive plate are welded throughhot pressing. The polymer resin material plate added with the conductive agent and the polymer resin material plate added with the non-conductive material are spliced to form the spliced bipolar plate, so that the cost is low, the internal leakage current of the battery can be reduced, and the battery efficiency is improved.

Description

Technical field [0001] The invention relates to the technical field of vanadium batteries, in particular to a vanadium battery spliced ​​conductive plastic bipolar plate. Background technique [0002] At present, the bipolar plate materials of vanadium batteries are mainly graphite bipolar plates and conductive plastic bipolar plates. The bipolar plates have the function of separating the positive and negative electrolytes. The bipolar plates outside the reaction zone contact the electrolyte, which will increase the leakage current, reduce the energy efficiency of the stack, and even cause the internal short circuit of the stack. Using conductive bipolar plates to separate the positive and negative electrolytes in the non-reaction zone increases the amount of conductive bipolar plates, thereby increasing the material cost of the system. Summary of the invention [0003] The technical problem to be solved by the present invention is to provide a vanadium battery spliced ​​conducti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M4/96H01M8/18
CPCH01M4/8657H01M4/96H01M8/188H01M2004/8694Y02E60/50
Inventor 王宇熊仁海吕玉康
Owner 杭州德海艾科能源科技有限公司
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