A high-power liquid flow battery structure
Through the multi-substack assembly structure and the integrated structure of the core, the problems of uneven flow rate and large packaging pressure of the flow battery when increasing the power are solved, and a high-power, low-volume and low-weight flow battery structure is realized.
Patent Information
- Application Number
- CN202411991112.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-04-08
AI Technical Summary
When existing flow batteries increase their power, they can easily lead to uneven flow, high packaging pressure, high sealing difficulty, and large stack volume and weight, affecting the integration of external pipelines.
A multi-substack assembly structure is adopted, and the sub-stack is fixed through fasteners, and a common inlet and outlet hole are set to ensure that the flow rate of each sub-stack is uniform. A multi-set core structure is used to reduce the packaging pressure.
It has achieved a significant increase in the number of single cells, increased single stack power, reduced stack volume and weight, reduced material cost and packaging pressure, and simplified process steps.
Smart Images
Figure CN119786676A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of liquid flow batteries, and in particular relates to a high-power liquid flow battery structure. Background Art
[0002] A liquid flow battery is composed of several electrodes, electrode frames, bipolar plates, and ion membranes stacked together in the manner of a filter press and equipped with current collecting plates, guide plates, and end plates on both sides to form a liquid flow battery stack.
[0003] The power compartment and capacity compartment of the flow battery stack are set separately. The output power of the battery depends on the size and number of the stack, and the energy storage capacity depends on the capacity and concentration of the electrolyte. Therefore, its design is very flexible. To increase the output power, just increase the area and number of the stack. To increase the energy storage capacity, just increase the volume of the electrolyte.
[0004] In current engineering applications, when the current density is constant, the power can only be increased by increasing the number of cells in a single stack. However, when there are too many cells in the stack, it is easy to cause uneven flow; and the more cells there are, the greater the packaging pressure required, which increases the difficulty of sealing; in addition, the more cells there are, the larger the volume and weight of the stack, which is not conducive to external pipeline integration.
[0005] In order to solve the above problems, a high-power liquid flow battery structure is proposed. Summary of the invention
[0006] The purpose of the present invention is to provide a high-power liquid flow battery structure to solve the existing problems.
[0007] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:
[0008] The present invention discloses a high-power liquid flow battery structure, comprising a sub-stack A, a sub-stack B, a sub-stack C and a sub-stack D, wherein the lower circular holes of the sub-stack A, the sub-stack B, the sub-stack C and the sub-stack D are all liquid inlet holes, and the upper circular holes are all liquid outlet holes; the sub-stack B and the sub-stack A share the liquid inlet hole and the liquid outlet hole, and the sub-stack C and the sub-stack D share the liquid inlet hole and the liquid outlet hole; the sub-stack B and the sub-stack C are fixedly connected by fasteners, the sub-stack A is assembled on one side of the sub-stack B, and the sub-stack B and the sub-stack A are fastened together by fasteners; the sub-stack D is assembled on one side of the sub-stack C, and the sub-stack C and the sub-stack D are fastened together by fasteners; the free ends of the sub-stack A and the sub-stack D are both provided with iron end plates, and the two iron end plates fasten the sub-stack A, the sub-stack B, the sub-stack C and the sub-stack D by screws.
[0009] Furthermore, the sub-stack A, sub-stack B, sub-stack C and sub-stack D are all assembled by stacking the same number of single batteries.
[0010] Furthermore, the liquid inlet plate and liquid outlet plate shared between the sub-stack B and sub-stack A, and between the sub-stack C and sub-stack D meet the requirement of cross-liquid inlet and outlet, thereby ensuring uniform flow of each sub-stack.
[0011] The present invention has the following beneficial effects:
[0012] The present invention can stack at least four sub-stacks together, which can greatly increase the number of single cells and achieve the purpose of increasing the power of a single stack.
[0013] The present invention adopts a variety of liquid inlet methods, which can reduce the number of iron end plates and liquid inlet and outlet plates of the battery stack, effectively reduce the volume and weight of the battery stack, reduce material costs, and simplify process steps.
[0014] The present invention adopts a multi-group integrated core structure, which can greatly reduce the packaging pressure of the fuel cell stack.
[0015] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.
[0017] Figure 1 This is a schematic diagram of the overall structure of a high-power liquid flow battery structure.
[0018] In the accompanying drawings, the components represented by the reference numerals are listed as follows:
[0019] 1. Sub-pile A; 2. Sub-pile B; 3. Sub-pile C; 4. Sub-pile D; 5. Iron end plate; 6. Screw. DETAILED DESCRIPTION
[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0021] In the description of the present invention, it should be understood that the terms "upper", "middle", "outer", "inner" and the like indicating directions or positional relationships are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.
[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0023] See also Figure 1 As shown, the present invention is a high-power liquid flow battery structure, including sub-stack A1, sub-stack B2, sub-stack C3 and sub-stack D4, the lower circular holes of sub-stack A1, sub-stack B2, sub-stack C3 and sub-stack D4 are all liquid inlet holes, and the upper circular holes are all liquid outlet holes; sub-stack B2 and sub-stack A1 share the liquid inlet hole and the liquid outlet hole, and sub-stack C3 and sub-stack D4 share the liquid inlet hole and the liquid outlet hole; sub-stack B2 and sub-stack C3 are fixedly connected by fasteners, sub-stack A1 is assembled on one side of sub-stack B2, and sub-stack B2 and sub-stack A1 are fastened together by fasteners; sub-stack D4 is assembled on one side of sub-stack C3, and sub-stack C3 and sub-stack D4 are fastened together by fasteners; free ends of sub-stacks A1 and sub-stack D4 are both provided with iron end plates 5, and the two iron end plates 5 fasten sub-stacks A1, sub-stack B2, sub-stack C3 and sub-stack D4 through screws 6.
[0024] In one embodiment, the sub-stack A1, the sub-stack B2, the sub-stack C3 and the sub-stack D4 are all assembled by stacking the same number of single cells.
[0025] In one embodiment, the liquid inlet plate and liquid outlet plate shared between the sub-stack B2 and the sub-stack A1 and between the sub-stack C3 and the sub-stack D4 can satisfy the cross-liquid inlet and outlet, ensuring uniform flow of each sub-stack.
[0026] It should be further explained that the present invention adopts the method of stacking several sub-stacks together, which can greatly increase the number of single cells and achieve the purpose of increasing the power of a single stack; adopting a variety of liquid inlet methods can effectively realize the assembly of four sub-stacks or more sub-stacks on one battery stack, avoiding the uneven flow caused by a large number of pieces, and reducing the number of iron end plates and liquid inlet and outlet plates of the battery stack, effectively reducing the volume and weight of the battery stack; adopting a multi-group integrated core structure, that is, making multiple single cells into an integral component, and then connecting several integral components in series, which greatly reduces the packaging pressure of the battery stack.
[0027] In the present invention, at least four sub-stacks can be assembled together, which can greatly increase the number of single cells and achieve the purpose of increasing the power of a single stack; assembling multiple sub-stacks together can reduce the number of iron end plates and liquid inlet and outlet plates of the battery stack, effectively reduce the volume and weight of the battery stack, reduce production costs, and simplify process steps.
[0028] The present invention adopts a variety of liquid inlet methods, and the number of single cells in each sub-stack is the same, ensuring that the flow rate of each single cell is as uniform as possible.
[0029] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0030] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.
Claims
1. A high-power liquid flow battery structure, comprising a sub-stack A (1), a sub-stack B (2), a sub-stack C (3) and a sub-stack D (4), characterized in that: The lower circular holes of the sub-stack A (1), sub-stack B (2), sub-stack C (3) and sub-stack D (4) are all liquid inlet holes, and the upper circular holes are all liquid outlet holes; the sub-stack B (2) and sub-stack A (1) share the liquid inlet hole and the liquid outlet hole, and the sub-stack C (3) and sub-stack D (4) share the liquid inlet hole and the liquid outlet hole; the sub-stack B (2) and sub-stack C (3) are fixedly connected by fasteners, and the sub-stack A (1) is assembled on one side of the sub-stack B (2) by fasteners. The sub-stack B (2) and the sub-stack A (1) are fastened together; a sub-stack D (4) is assembled on one side of the sub-stack C (3), and the sub-stack C (3) and the sub-stack D (4) are fastened together by fasteners; the free ends of the sub-stack A (1) and the sub-stack D (4) are both provided with iron end plates (5), and the two iron end plates (5) fasten the sub-stack A (1), the sub-stack B (2), the sub-stack C (3) and the sub-stack D (4) together by screws (6).
2. A high-power liquid flow battery structure according to claim 1, characterized in that: The sub-stack A (1), sub-stack B (2), sub-stack C (3) and sub-stack D (4) are all assembled by stacking the same number of single batteries.
3. A high-power liquid flow battery structure according to claim 1, characterized in that: The liquid inlet plate and liquid outlet plate shared between the sub-stack B (2) and the sub-stack A (1) and between the sub-stack C (3) and the sub-stack D (4) meet the requirement of cross-inlet and outlet, thus ensuring uniform flow of each sub-stack.