Spliced graphite bipolar plate of vanadium battery

A bipolar plate and vanadium battery technology, applied in the field of vanadium batteries, can solve the problems of increasing the amount of conductive bipolar plates, reducing the energy efficiency of the stack, and increasing the cost of materials, so as to reduce the internal leakage current of the battery, accelerate the crystallization speed, and improve the The effect of the service life

Active Publication Date: 2020-11-13
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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  • Spliced graphite bipolar plate of vanadium battery
  • Spliced graphite bipolar plate of vanadium battery
  • Spliced graphite bipolar plate of vanadium battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A vanadium battery spliced ​​graphite bipolar plate, the preparation process of which is as follows:

[0027] Preparation of conductive plate 1: Put the expanded graphite and conductive graphite powder into the mold according to the ratio of 90:10, apply a pressure of 30 MPa, hold the pressure for 15 min, prepare the conductive plate substrate, and place the conductive plate substrate on the engraving machine. , the protruding strip structure 12 of the conductive plate 1 is processed and punched with round holes, the diameter of which is 1 mm, and the round holes are evenly arranged. The thickness of the square plate-shaped structure 11 of the conductive plate 1 is 1 mm, and the thickness of the protruding strip-shaped structure 12 is 0.4 mm.

[0028] Preparation of non-conductive plate 2: Mass fraction of non-conductive plate 2 components: polypropylene PP 70%, silicon dioxide 30%. The above raw materials are weighed and uniformly mixed at a high speed in a high-speed...

Embodiment 2

[0031] A vanadium battery spliced ​​graphite bipolar plate, the preparation process of which is as follows:

[0032] Preparation of conductive plate 1: Put the expanded graphite and conductive graphite powder into the mold according to the ratio of 92:8, apply a pressure of 40 MPa, hold the pressure for 10 min, prepare the conductive plate substrate, and place the conductive plate substrate on the engraving machine. , the protruding strip structure 12 of the conductive plate 1 is processed and punched with circular holes, the diameter of which is 1.5 mm, and the circular holes are evenly arranged. The thickness of the square plate-shaped structure 11 of the conductive plate 1 is 2 mm, and the thickness of the protruding strip-shaped structure 12 is both 0.8 mm.

[0033] Preparation of non-conductive plate 2: The mass fraction of non-conductive plate 2 components: polyethylene PE 80%, titanium dioxide 20%. The above raw materials are weighed and uniformly mixed at a high speed...

Embodiment 3

[0036] A vanadium battery spliced ​​graphite bipolar plate, the preparation process of which is as follows:

[0037] Preparation of conductive plate 1: Put the expanded graphite and conductive graphite powder into the mold according to the ratio of 95:5, apply a pressure of 40 MPa, maintain the pressure for 10 min, prepare the conductive plate substrate, and place the conductive plate substrate on the engraving machine. , the protruding strip structure 12 of the conductive plate 1 is processed and punched with circular holes, the diameter of which is 2.0 mm, and the circular holes are evenly arranged. The thickness of the square plate-like structure 11 of the conductive plate 1 is 3 mm, and the thickness of the protruding strip-like structure 12 is both 1.2 mm.

[0038] Preparation of non-conductive plate 2: The mass fraction components of non-conductive plate 2: epoxy resin 70%, titanium dioxide 20%, silicate 10%. The above raw materials are weighed and then mixed in an inte...

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Abstract

The invention relates to a spliced graphite bipolar plate of a vanadium battery. The bipolar plate comprises a conductive plate and a non-conductive plate, and the conductive plate covers an electrochemical reaction area and an electrolyte in contact with the electrochemical reaction area. The non-conductive plate covers the electrolyte flow channel area and is in contact with the electrolyte in the electrolyte flow channel area, the conductive plate is a conductive graphite plate, the non-conductive plate is a non-conductive high polymer material plate, and the conductive plate and the non-conductive plate are welded through hot pressing. The non-conductive plate is prepared by adding a non-conductive material into a polymer resin material. The conductive graphite plate and the non-conductive polymer material plate 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 ​​graphite bipolar plate. Background technique [0002] At present, the vanadium battery bipolar plate materials are mainly graphite bipolar plates and conductive plastic bipolar plates. The bipolar plate has the function of separating the positive and negative electrolytes. The bipolar plate outside the reaction area contacts the electrolyte, which will increase the leakage current, reduce the energy efficiency of the stack, and even lead to a short circuit inside the stack. Separating the positive and negative electrolytes in the non-reaction zone with conductive bipolar plates 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 ​​graphite bipolar plate, ...

Claims

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Application Information

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IPC IPC(8): H01M4/96H01M4/86H01M8/18
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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