A bipolar plate for a flow battery with conductive metal sheets

Abstract

This utility model discloses a bipolar plate for a flow battery with a conductive metal sheet, comprising a front electrode plate, an intermediate substrate, and a rear electrode plate. The front electrode plate is a conductive plastic sheet, the intermediate substrate is a metal sheet, and the rear electrode plate is also a conductive plastic sheet. The intermediate substrate is composite-extruded between the front and rear electrode plates. By forming the front, intermediate, and rear electrode plates into a composite bipolar plate, the conductivity of the bipolar plate can be increased through the intermediate substrate. Simultaneously, using a metal sheet for the intermediate substrate effectively ensures the strength and toughness of the bipolar plate, preventing brittleness and leakage. Since the front and rear electrode plates are made of plastic, the weight is reduced. This material combination provides a bipolar plate with better conductivity, lower porosity, and lower cost. Furthermore, the composite extrusion method simplifies the manufacturing process and makes it easy to implement.

Description

Technical Field

[0001] This utility model belongs to the technical field of flow battery bipolar plates, specifically relating to a flow battery bipolar plate with a conductive metal sheet. Background Technology

[0002] Flow batteries are a new type of energy storage technology for long-term, large-scale energy storage. The stack of a flow battery is assembled by stacking and pressing filters. As an important component of the stack, the bipolar plates not only isolate the positive and negative electrolytes, but also need to conduct electricity. The performance of the bipolar plates directly affects the performance of the stack.

[0003] Currently, most of the bipolar plates used in flow battery stacks are graphite bipolar plates. Graphite bipolar plates have good conductivity, but their porosity is relatively low compared to metal bipolar plates, and they also have lower strength and toughness. They are more prone to brittle fracture due to their lightweight nature. Their main advantage is their low cost. On the other hand, metal bipolar plates have better conductivity, lower porosity, and higher strength and toughness, but they are more expensive and heavier. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a flow battery bipolar plate with conductive metal sheets, which has the advantages of good conductivity and low cost.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a flow battery bipolar plate with conductive metal sheet, comprising a front electrode plate, an intermediate substrate and a rear electrode plate, wherein the front electrode plate is a conductive plastic plate, the intermediate substrate is a metal sheet, and the rear electrode plate is also a conductive plastic plate, and the intermediate substrate is compositely extruded between the front electrode plate and the rear electrode plate.

[0006] The above technical solution can optimize the product by making the front electrode plate, intermediate substrate, and rear electrode plate into a composite bipolar plate. The conductivity of the bipolar plate can be increased by the intermediate substrate. At the same time, the use of metal sheet for the intermediate substrate can effectively ensure the strength and toughness of the bipolar plate, making it less prone to brittleness and leakage. Since the front electrode plate and rear electrode plate are made of plastic, the weight will be reduced. This material combination provides a bipolar plate with better conductivity, lower porosity, and lower cost. In addition, the composite extrusion method makes the manufacturing process simple and easy to implement.

[0007] Preferably, the conductivity of the intermediate substrate is better than that of the front electrode plate and the rear electrode plate.

[0008] The above technical solution can increase the conductivity of the bipolar plate. Since the conductivity of the middle substrate is better than that of the front and rear plates, the conductivity will be improved.

[0009] Preferably, the porosity of the intermediate substrate is better than that of the front and rear electrode plates.

[0010] The above technical solution can achieve the effect of battery fluid circulation. The porosity of the intermediate substrate is better than that of the front plate and the rear plate, which allows the battery fluid to circulate easily.

[0011] Preferably, the intermediate substrate is completely wrapped between the front electrode plate and the rear electrode plate.

[0012] The above technical solution can achieve a protective effect. The intermediate substrate is completely wrapped between the front electrode plate and the rear electrode plate, so that the intermediate substrate will not be exposed around its perimeter, thus better protecting the intermediate substrate.

[0013] Preferably, the intermediate substrate has better toughness and strength than the front and rear electrode plates.

[0014] The above technical solution can enhance the strength of the equipment. Since the toughness and strength of the intermediate substrate are better than those of the front and rear plates, it can effectively prevent brittle fracture and leakage.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. By making the front electrode plate, intermediate substrate, and rear electrode plate into a composite bipolar plate, the conductivity of the bipolar plate can be increased by the intermediate substrate. At the same time, the use of a thin metal sheet for the intermediate substrate can effectively ensure the strength and toughness of the bipolar plate, making it less prone to brittleness and leakage. Since the front electrode plate and rear electrode plate are made of plastic, the weight will be reduced. This material combination provides a bipolar plate with better conductivity, lower porosity, and lower cost. In addition, the composite extrusion method makes the manufacturing process simple and easy to implement.

[0017] 2. Because the conductivity of the intermediate substrate is better than that of the front and rear plates, the conductivity is improved. The porosity of the intermediate substrate is also better than that of the front and rear plates, which allows the battery fluid to flow easily. The intermediate substrate is completely wrapped between the front and rear plates, which prevents leakage around the intermediate substrate and thus better protects it. Because the toughness and strength of the intermediate substrate are better than those of the front and rear plates, it can effectively prevent brittleness and leakage. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main structure of this utility model.

[0019] In the diagram: 1. Front electrode plate; 2. Middle substrate; 3. Rear electrode plate. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Example 1:

[0022] Please see Figure 1 This utility model provides a technical solution: a flow battery bipolar plate with conductive metal sheet, including a front plate 1, an intermediate substrate 2 and a rear plate 3. The front plate 1 is a conductive plastic plate, the intermediate substrate 2 is a metal sheet, and the rear plate 3 is also a conductive plastic plate. The intermediate substrate 2 is compositely extruded between the front plate 1 and the rear plate 3.

[0023] In this embodiment, the front electrode plate 1, the intermediate substrate 2, and the rear electrode plate 3 are made into a composite bipolar plate. The conductivity of the bipolar plate can be increased by the intermediate substrate 2. At the same time, the use of a metal sheet for the intermediate substrate 2 can effectively ensure the strength and toughness of the bipolar plate, making it less prone to brittleness and leakage. Since the front electrode plate 1 and the rear electrode plate 3 are made of plastic, the weight is reduced. This material combination provides a bipolar plate with better conductivity, lower porosity, and lower cost. In addition, the composite extrusion method makes the manufacturing process simple and easy to implement.

[0024] Example 2:

[0025] Please see Figure 1 Based on Embodiment 1, this utility model provides a technical solution: the conductivity of the intermediate substrate 2 is better than that of the front electrode plate 1 and the rear electrode plate 3, and the porosity of the intermediate substrate 2 is better than that of the front electrode plate 1 and the rear electrode plate 3.

[0026] In this embodiment, the conductivity of the intermediate substrate 2 is better than that of the front electrode plate 1 and the rear electrode plate 3, so the conductivity is improved. The porosity of the intermediate substrate 2 is better than that of the front electrode plate 1 and the rear electrode plate 3, which allows the battery fluid to flow easily.

[0027] Example 3:

[0028] Please see Figure 1 Based on Embodiment 1 and Embodiment 2, this utility model provides a technical solution: the intermediate substrate 2 is completely wrapped between the front electrode plate 1 and the rear electrode plate 3, and the toughness and strength of the intermediate substrate 2 are better than those of the front electrode plate 1 and the rear electrode plate 3.

[0029] In this embodiment, the intermediate substrate 2 is completely wrapped between the front electrode plate 1 and the rear electrode plate 3, which prevents leakage around the intermediate substrate 2 and thus better protects the intermediate substrate 2. Since the intermediate substrate 2 has better toughness and strength than the front electrode plate 1 and the rear electrode plate 3, it can effectively prevent brittleness and leakage.

[0030] The working principle and usage process of this utility model are as follows: A composite bipolar plate is made by forming a front electrode plate 1, an intermediate substrate 2, and a rear electrode plate 3. The conductivity of the bipolar plate can be increased by the intermediate substrate 2. At the same time, the intermediate substrate 2 is made of metal sheet, which can well ensure the strength and toughness of the bipolar plate and prevent it from becoming brittle and causing leakage. Since the front electrode plate 1 and the rear electrode plate 3 are made of plastic, the weight is reduced. Through this material combination, a bipolar plate with better conductivity, lower porosity, and lower price is provided. At the same time, the composite extrusion method makes the manufacturing process simple and easy to implement. Since the conductivity of the intermediate substrate 2 is better than that of the front electrode plate 1 and the rear electrode plate 3, the conductivity is improved. The porosity of the intermediate substrate 2 is better than that of the front electrode plate 1 and the rear electrode plate 3, which allows the battery fluid to flow easily. The intermediate substrate 2 is completely wrapped between the front electrode plate 1 and the rear electrode plate 3, which can prevent leakage from the edges of the intermediate substrate 2, thus better protecting the intermediate substrate 2. Since the toughness and strength of the intermediate substrate 2 are better than those of the front electrode plate 1 and the rear electrode plate 3, it can well ensure that it is not brittle and causing leakage.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A bipolar plate for a flow battery with conductive metal sheets, comprising a front electrode plate (1), an intermediate substrate (2), and a rear electrode plate (3), characterized in that: The front electrode plate (1) is a conductive plastic plate, the intermediate substrate (2) is a metal sheet, and the rear electrode plate (3) is also a conductive plastic plate. The intermediate substrate (2) is compositely extruded between the front electrode plate (1) and the rear electrode plate (3).

2. The bipolar plate of a flow battery with a conductive metal sheet according to claim 1, characterized in that: The conductivity of the intermediate substrate (2) is better than that of the front electrode plate (1) and the rear electrode plate (3).

3. The bipolar plate of a flow battery with a conductive metal sheet according to claim 1, characterized in that: The porosity of the intermediate substrate (2) is better than that of the front electrode plate (1) and the rear electrode plate (3).

4. The bipolar plate of a flow battery with a conductive metal sheet according to claim 1, characterized in that: The intermediate substrate (2) is completely wrapped between the front electrode plate (1) and the rear electrode plate (3).

5. The bipolar plate of a flow battery with a conductive metal sheet according to claim 1, characterized in that: The intermediate substrate (2) has better toughness and strength than the front electrode plate (1) and the rear electrode plate (3).

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