# US 2019/0173101 A1 · Bipolar plate-electrode assembly using thermoplastic resin and manufacturing method thereof

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- Number: US 2019/0173101 A1
- Document ID: US20190173101A1
- Status: Published application
- Kind: A1
- Application number: 16/308,096
- Filed: 2017-11-06
- Published: 2019-06-06
- Earliest claimed: 2016-12-09
- Assignees: H2, Inc.
- Applicants: H2, Inc.
- Inventors: Se Goo KANG; Yujong KIM; Kyung Mae PARK; Shin HAN
- Web page: https://patentgrep.com/patent/US20190173101A1

## CPC

- H01M 8/0245: in the form of layered or coated products
- H01M 8/0239: Organic resins; Organic polymers
- H01M 8/18: Regenerative fuel cells, e.g. redox flow batteries or secondary fuel cells
- H01M 8/188: {by recharging of redox couples containing fluids; Redox flow type batteries}
- Y02E 60/50: Fuel cells
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

Provided is a bipolar plate-electrode assembly used in a redox flow battery stack, in which a bipolar plate (140) is made of a thermoplastic resin, electrodes (170A, 170B) disposed on both sides of the bipolar plate are thermally compressed at a central portion of the bipolar plate so as to be permeated into the bipolar plate, the size of the bipolar plate is larger than that of the electrodes, and fiber mats (150A, 150B) are hot-pressed so as to be permeated in an periphery (141) the bipolar plate which is a larger area than the electrodes.

## Claims

### Claim 1

A bipolar plate-electrode assembly used in a redox flow battery stack, wherein
a bipolar plate (140) is made of a thermoplastic resin,
electrodes (170A, 170B) disposed on both sides of the bipolar plate are thermally compressed at a central portion of the bipolar plate so as to be permeated into the bipolar plate,
the size of the bipolar plate is larger than that of the electrodes, and
fiber mats (150A, 150B) are hot-pressed so as to be permeated in a periphery (141) of the bipolar plate which is a larger area than the electrodes.

### Claim 2 (depends on 1)

The bipolar plate-electrode assembly of claim 1, wherein a part of the fiber mats (150A; 150B) is disposed between the periphery of the electrode and the bipolar plate and hot-pressed to be permeated into the bipolar plate (140).

### Claim 3 (depends on 1)

The bipolar plate-electrode assembly of claim 1, wherein the permeated fiber mat (150A; 150B) has a shape having an inner opening, and the outer size of the fiber mat (150A, 150B) is equal to the outer size of the bipolar plate and the size of the inner opening is smaller than the outer size of the electrodes (170A, 170B).

### Claim 4 (depends on 2)

The bipolar plate-electrode assembly of claim 2, wherein the permeated fiber mat (150A; 150B) has a shape having an inner opening, and the outer size of the fiber mat (150A, 150B) is equal to the outer size of the bipolar plate and the size of the inner opening is smaller than the outer size of the electrodes (170A, 170B).

### Claim 5 (depends on 1)

The bipolar plate-electrode assembly of claim 1, wherein a flow path (142) is formed across the electrodes (170A, 170B).

### Claim 6 (depends on 2)

The bipolar plate-electrode assembly of claim 2, wherein a flow path (142) is formed across the electrodes (170A, 170B).

### Claim 7

A manufacturing method of a bipolar plate-electrode assembly comprising:
disposing a fiber mat (150A; 150B) having an inner opening at each of both sides of a thermoplastic resin sheet as a bipolar plate (140) material;
disposing an electrode material at a central portion of each of the both sides of the thermoplastic resin sheet;
disposing jigs (160A; 160B) on the fiber mats (150A; 150B), respectively; and
hot-pressing the outsides of the jigs (160A; 160B) and the electrode material.

### Claim 8 (depends on 7)

The manufacturing method of claim 7, wherein the order of the disposing of the electrode material and the disposing of the jig is mutually exchangeable.

### Claim 9 (depends on 7)

The manufacturing method of claim 7, wherein the outer size of the fiber mat (150A, 150B) is equal to the outer size of the bipolar plate and the size of the inner opening is smaller than the outer size of the electrodes (170A, 170B).

### Claim 10 (depends on 9)

The manufacturing method of claim 9, wherein the outer size of the fiber mat (150A, 150B) is equal to the outer size of the bipolar plate and the size of the inner opening is smaller than the outer size of the electrodes (170A, 170B).

### Claim 11 (depends on 8)

The manufacturing method of claim 8, wherein the jig (160A; 160B) has a shape having an inner opening, the outer size of the jig (160A; 160B) is equal to the outer size of the fiber mats (150A, 150B), and the size of the inner opening is equal to the outer size of the electrode material.

### Claim 12 (depends on 7)

The manufacturing method of claim 7, further comprising:
forming a flow path (142) on the electrode material with a processing tool or a graver after the hot-pressing.

### Claim 13 (depends on 8)

The manufacturing method of claim 8, further comprising:
forming a flow path (142) on the electrode material with a processing tool or a graver after the hot-pressing.

### Claim 14 (depends on 7)

The manufacturing method of claim 7, further comprising:
forming a flow path (142) on the electrode material with a processing tool or a graver after the hot-pressing.

### Claim 15 (depends on 8)

The manufacturing method of claim 8, further comprising:
forming a flow path (142) on the electrode material with a processing tool or a graver after the hot-pressing.

### Claim 16 (depends on 7)

The manufacturing method of claim 7, wherein the fiber mat includes two or more inner openings, two or more electrode materials are disposed, the jig includes two or more inner openings, and a flow path (142) crossing the electrode material is formed.

### Claim 17 (depends on 8)

The manufacturing method of claim 8, wherein the fiber mat includes two or more inner openings, two or more electrode materials are disposed, the jig includes two or more inner openings, and a flow path (142) crossing the electrode material is formed.