Annular system of liquid flow energy storage battery

Abstract

The invention belongs to the technical field of flow batteries, and discloses a flow energy storage battery annular system which comprises an anolyte tank, a catholyte tank and at least two layers of power module bins, the catholyte tank is of an annular structure, the anolyte tank is located on the inner side, and the catholyte tank is located on the outer side. And the plurality of power module bins on each layer are uniformly arranged on the anolyte tank and the catholyte tank in the circumferential direction by taking the center line of the anolyte tank as an axis. The anolyte tank is arranged on the inner side of the catholyte tank, the catholyte tank is arranged to be of an annular structure, a rectangular array mode in the prior art is changed into an annular mode, the occupied area of the whole system is greatly reduced, the space utilization rate can be effectively increased through the mode that the power module bins are stacked in multiple layers, and the power module storage capacity is improved. And therefore, the energy density per unit area of the annular system of the liquid flow energy storage battery is effectively improved, so that the energy storage requirements of various scenes are met.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid flow batteries, and in particular to a liquid flow energy storage battery annular system. Background Art

[0002] At present, as a new type of energy storage method, liquid flow energy storage batteries are gradually attracting attention and attention in the market for their inherent safety characteristics. However, since liquid flow batteries are composed of energy storage modules and power reaction modules, compared with traditional systems that use lithium batteries for energy storage, liquid flow batteries have additional electrolyte storage units. The size of the storage unit directly determines the capacity of the entire battery system. Therefore, in order to ensure that the capacity of the liquid flow battery system meets the demand, it usually occupies a large area. However, this will result in a low energy density per unit area, which will also affect the application of liquid flow energy storage batteries and limit their use scenarios. At present, in the prior art, liquid flow energy storage batteries are usually arranged in a rectangular array. Although some structures are arranged in double layers under the premise of a rectangular array, the floor space is still large and the energy density per unit area is still very low. Therefore, how to effectively increase the energy density per unit area of ​​the energy storage system is a problem that people in this field need to solve. Summary of the invention

[0003] The object of the present invention is to provide a liquid flow energy storage battery annular system so as to effectively increase the energy density per unit area of ​​the energy storage system.

[0004] To achieve this object, the present invention adopts the following technical solutions:

[0005] Liquid flow energy storage battery ring system, including:

[0006] An anode liquid tank, a cathode liquid tank and a power module compartment, wherein the cathode liquid tank is arranged in an annular structure, and the anode liquid tank is located on the inner side, and the cathode liquid tank is located on the outer side, and the power module compartment is arranged in at least two layers, and a plurality of the power module compartments in each layer are all circumferentially evenly arranged on the anode liquid tank and the cathode liquid tank with the center line of the anode liquid tank as the axis.

[0007] Optionally, a PCS box is also included, which is located between the two power module compartments and above the anode liquid tank and the cathode liquid tank.

[0008] Optionally, at least a double-layer maintenance platform is provided above the anode liquid tank.

[0009] As an option, the number of layers of the power module compartment and the maintenance platform are arranged in one-to-one correspondence, and the power module compartment is surrounded on the outer side of the maintenance platform.

[0010] Optionally, a ladder is also included, which is located between the cathode liquid tanks, with one end of the ladder connected to the ground and the other end connected to the maintenance platform.

[0011] As an option, the maintenance platform is configured as a circular area.

[0012] Optionally, four adjacent power module compartments share one PCS box.

[0013] As an option, the power module compartment is provided with two layers, and each layer is provided with eight power module compartments.

[0014] Optionally, four PCS boxes are provided, and the four PCS boxes are symmetrically arranged relative to the center of the anode liquid tank.

[0015] Optionally, a supporting structure is also provided for supporting the power module compartment.

[0016] Beneficial effects of the present invention:

[0017] In the present invention, the anode liquid tank is arranged inside the cathode liquid tank, and the cathode liquid tank is arranged in an annular structure, thereby changing the rectangular array method in the prior art to an annular method. Furthermore, the power module compartment is provided with at least two layers, and the several power module compartments in each layer are arranged axially evenly above the anode liquid tank and the cathode liquid tank with the center line of the anode liquid tank as the axis, that is, the entire liquid flow energy storage battery annular system is installed in an annular structure and in a multi-layer stacking manner, thereby not only greatly reducing the footprint of the entire system, but also the multi-layer stacking method can effectively improve the space utilization rate, thereby effectively improving the energy density per unit area of ​​the liquid flow energy storage battery annular system to meet the energy storage needs of various scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of a liquid flow energy storage battery annular system according to an embodiment of the present invention;

[0019] Figure 2 It is a cross-sectional schematic diagram of the annular system of the liquid flow energy storage battery described in an embodiment of the present invention.

[0020] In the figure:

[0021] 10- anode liquid tank; 20- cathode liquid tank; 30- power module compartment; 40- PCS box; 50- ladder; 100- maintenance platform. DETAILED DESCRIPTION

[0022] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar parts or parts having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0023] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, it can be a mechanical connection or an electrical connection, it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In the description of the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in contact with the second feature through another feature between them instead of being in direct contact. Moreover, a first feature being "above", "above" and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0025] The technical solution of this embodiment is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0026] like Figure 1-Figure 2 As shown, this embodiment provides a liquid flow energy storage battery annular system, including an anode liquid tank 10, a cathode liquid tank 20 and a power module compartment 30, the cathode liquid tank 20 is arranged in an annular structure, and the anode liquid tank 10 is located on the inside, and the cathode liquid tank 20 is located on the outside, the power module compartment 30 is arranged in at least two layers, and the several power module compartments 30 in each layer are all centered on the center line of the anode liquid tank 10 and are evenly arranged circumferentially on the anode liquid tank 10 and the cathode liquid tank 20.

[0027] Specifically, in this embodiment, the anode liquid tank 10 is arranged inside the cathode liquid tank 20, and the cathode liquid tank 20 is arranged in an annular structure, thereby changing the rectangular array method in the prior art to an annular method. Further, the power module compartment 30 is provided with at least two layers, and the several power module compartments 30 in each layer are arranged axially uniformly above the anode liquid tank 10 and the cathode liquid tank 20 with the center line of the anode liquid tank 10 as the axis, that is, the entire liquid flow energy storage battery annular system is installed in an annular structure and in a multi-layer stacking manner, thereby not only greatly reducing the footprint of the entire system, but also the multi-layer stacking method can effectively improve the space utilization rate, thereby effectively improving the energy density per unit area of ​​the liquid flow energy storage battery annular system to meet the energy storage needs of various scenarios.

[0028] The specific structure of the liquid flow energy storage battery annular system in this embodiment is described below.

[0029] like Figure 1 As shown, the liquid flow energy storage battery annular system in this embodiment includes an anode liquid tank 10, a cathode liquid tank 20, a power module compartment 30, a PCS box 40 (PCS, power storage converter, Power Conversion System) and a ladder 50, and is provided with a maintenance platform 100.

[0030] Specifically, in this embodiment, the anode liquid tank 10 and the cathode liquid tank 20 are arranged on the first layer close to the ground, and the cathode liquid tank 20 is arranged as an annular structure, the anode liquid tank 10 is located in the inner circle of the cathode liquid tank 20, belonging to the inner side, and the cathode liquid tank 20 is arranged on the outside of the anode liquid tank 10, belonging to the outer side. Furthermore, a support structure is arranged on the cathode liquid tank 20. Specifically, the support structure is located at the bottom of the power module compartment 30, so that the power module compartment 30 can be supported by the support structure to avoid the power module compartment 30 being directly placed on the cathode liquid tank 20, thereby ensuring the stability of the entire liquid flow energy storage battery annular system. Exemplarily, the anode liquid tank 10 and the cathode liquid tank 20 are both composed of a plurality of fan-shaped unit blocks, and each unit block of the cathode liquid tank 20 can be provided with at least one support structure to ensure the stability of the support.

[0031] Furthermore, in this embodiment, the power module warehouse 30 is located above the anode liquid tank 10 and the cathode liquid tank 20, that is, it is built from the second layer. Exemplarily, the power module warehouse 30 is provided with at least two layers, and the several power module warehouses 30 in each layer are uniformly arranged circumferentially with the center line of the anode liquid tank 10 as the axis, so as to achieve multi-layer stacking above the anode liquid tank 10 and the cathode liquid tank 20, thereby improving space utilization. Specifically, in this embodiment, the power module warehouse 30 is provided with two layers, and eight power module warehouses 30 are provided in each layer, and the eight power module warehouses 30 are uniformly arranged circumferentially with the center line of the anode liquid tank 10 as the axis.

[0032] Optionally, the length of the power module compartment 30 corresponds to the outer diameter of the cathode liquid tank 20 to ensure that the power module compartment 30 is stably installed and does not protrude. Thus, under the double-layer stacking effect of the power module compartment 30, the floor space of the entire system can be effectively reduced, and the stable installation of the power module compartment 30 can be ensured.

[0033] like Figure 1 As shown, in this embodiment, the PCS box 40 is located between the two power module compartments 30, and is located above the anode liquid tank 10 and the cathode liquid tank 20, and is used for the use of multiple power module compartments 30. Exemplarily, in this embodiment, four adjacent power module compartments 30 share one PCS box 40. Exemplarily, in this embodiment, four PCS boxes 40 are provided, and the four PCS boxes 40 are symmetrically arranged relative to the center of the anode liquid tank 10, so as to ensure that the two adjacent groups of two stacked power module compartments 30 on both sides of each PCS box 40 can share the same PCS box 40, and can ensure the weighing balance above the anode liquid tank 10 and the cathode liquid tank 20, avoid tipping, and improve the stability of the entire system.

[0034] Combination Figure 1 and Figure 2 As shown, further, at least a double-layer maintenance platform 100 is provided above the anode liquid tank 10. Specifically, the maintenance platform 100 is set as a circular area, and the number of layers of the power module compartment 30 and the maintenance platform 100 is set one by one, and the power module compartment 30 of each layer is surrounded by the outside of the maintenance platform 100, so that the maintenance personnel can perform maintenance on each power module compartment 30 on the maintenance platform 100. Optionally, a ladder 50 is also provided in this embodiment, and the ladder 50 is located between the cathode liquid tank 20, and one end of the ladder 50 is connected to the ground, and the other end is connected to the maintenance platform 100, so as to facilitate the maintenance personnel to climb and walk. Exemplarily, in this embodiment, the ladder 50 is set in two sections, the first section is connected to the ground and above the cathode liquid tank 20, and the second section is connected to the above the cathode liquid tank 20 and the maintenance platform 100. Optionally, an avoidance channel is provided on the cathode liquid tank 20, and the first section of the ladder 50 is embedded in the avoidance channel. Furthermore, the second section of the ladder 50 is located between the two power module compartments 30 and avoids the location of the PCS box 40 , thereby ensuring stable installation of the ladder 50 .

[0035] Therefore, the liquid flow energy storage battery annular system in this embodiment realizes maintenance operations of multiple bins and boxes through the maintenance platform 100, and the PCS box 40 and the power module bin 30 are both arranged above the anode liquid tank 10 and the cathode liquid tank 20, which can greatly save the overall floor space of the project.

[0036] Specifically, under the premise of ensuring that the electrolyte capacity is equal, the comparison results of the corresponding floor space, number of batteries and liquid tank volume in the rectangular array arrangement and the ring system arrangement in this embodiment are as follows:

[0037] Table 1

[0038]

[0039] Optionally, the unit of inner diameter and outer diameter in Table 1 is m, the unit of area is m2, and the unit of volume is m 3 . Further, from the data comparison in Table 1, it can be seen that within a certain range, the layout of the liquid flow energy storage battery ring system in this embodiment can reduce the floor space by 20%-30% relative to the layout of the rectangular array, thereby improving the energy density per unit area of ​​the entire energy storage system, and the liquid flow energy storage battery ring system in this embodiment can be used for all liquid flow battery systems, not limited to zinc-iron liquid flow batteries, all-vanadium liquid flow batteries, or zinc-bromine liquid flow batteries.

[0040] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. Liquid flow energy storage battery ring system, characterized in that: include: An anode liquid tank (10), a cathode liquid tank (20) and a power module compartment (30), wherein the cathode liquid tank (20) is arranged in an annular structure, and the anode liquid tank (10) is located on the inner side, and the cathode liquid tank (20) is located on the outer side, and the power module compartment (30) is arranged in at least two layers, and a plurality of power module compartments (30) in each layer are arranged uniformly circumferentially on the anode liquid tank (10) and the cathode liquid tank (20) with the center line of the anode liquid tank (10) as the axis.

2. The liquid flow energy storage battery annular system according to claim 1, characterized in that: It also includes a PCS box (40), which is located between the two power module compartments (30) and above the anode liquid tank (10) and the cathode liquid tank (20).

3. The liquid flow energy storage battery annular system according to claim 1, characterized in that: At least a double-layer maintenance platform (100) is provided above the anode liquid tank (10).

4. The liquid flow energy storage battery annular system according to claim 3, characterized in that: The power module compartment (30) and the maintenance platform (100) are arranged in a one-to-one correspondence in number of layers, and the power module compartment (30) is arranged around the outside of the maintenance platform (100).

5. The liquid flow energy storage battery annular system according to claim 3, characterized in that: It also includes a ladder (50), which is located between the cathode liquid tanks (20), and one end of the ladder (50) is connected to the ground, and the other end is connected to the maintenance platform (100).

6. The liquid flow energy storage battery annular system according to claim 3, characterized in that: The maintenance platform (100) is configured as a circular area.

7. The liquid flow energy storage battery annular system according to claim 2, characterized in that: Four adjacently arranged power module compartments (30) share one PCS box (40).

8. The liquid flow energy storage battery annular system according to claim 2, characterized in that: The power module compartment (30) is provided with two layers, and each layer is provided with eight power module compartments (30).

9. The liquid flow energy storage battery annular system according to claim 8, characterized in that: Four PCS boxes (40) are provided, and the four PCS boxes (40) are symmetrically arranged relative to the center of the anode liquid tank (10).

10. The liquid flow energy storage battery annular system according to claim 1, characterized in that: A supporting structure is also provided for supporting the power module compartment (30).

Images