Integrated balancing device for electrolyte capacity regeneration of flow battery

Abstract

The utility model relates to an integrated balancing device for electrolyte capacity regeneration of a flow battery, which comprises a battery pack with an external circuit, and the battery pack is divided into a positive electrode chamber and a negative electrode chamber; the anode chamber and the cathode chamber are circularly connected with the anode liquid storage component and the cathode liquid storage component respectively; the device further comprises a regeneration liquid storage component and a gas-liquid absorption component, an outlet of the regeneration liquid storage component is connected with one opening of the negative electrode chamber, and the other opening of the negative electrode chamber is connected with an inlet of the gas-liquid absorption component. The integrated balancing device disclosed by the utility model comprises the battery energy storage device and the electrolyte rebalancing device which share one battery pack, one delivery pump and one pipeline, so that the equipment cost is reduced, and the occupied area is reduced; and compared with the condition that the number of energy storage battery packs in a common independent balancing device is much larger than that of regenerative battery packs, the energy storage battery packs and the regenerative battery packs share one battery pack, the number of the regenerative battery packs is obviously increased, and the electrolyte capacity regeneration efficiency is obviously improved.

Description

Technical Field

[0001] The utility model relates to the technical field of flow battery energy storage, in particular to an integrated balancing device for regenerating the electrolyte capacity of a flow battery. Background Art

[0002] In recent years, with the development of society and the adjustment of the energy structure, the level and economy of new energy technologies have been greatly improved, and the demand for large-scale, high-safety, and long-duration energy storage technologies has gradually emerged. In this context, among the existing energy storage technologies, the electrochemical fluid battery, i.e., the flow battery, has the characteristics of easy modularization, flexible duration, safety, and no geographical restrictions, and is suitable for long-duration and large-scale energy storage, and is expected to meet all the requirements for energy storage in the new power system.

[0003] However, there are also some problems in the operation of the flow battery energy storage device, such as a relatively serious capacity attenuation problem. During the continuous operation of the device, there is an imbalance in the reactions of the positive and negative electrode electrolytes, and the electrolyte reaction at the positive or negative electrode will end prematurely, resulting in battery capacity attenuation and electrolyte failure. Eventually, the battery capacity can only be restored after frequently replacing the electrolyte. However, replacing the new electrolyte has a high cost, a long replacement cycle, and is not environmentally friendly.

[0004] To solve the problem of battery capacity attenuation, it is necessary to provide an electrolyte rebalancing device to reduce the failed electrolyte in the flow battery. CN217655916U discloses an electrolyte rebalancing device for an iron-chromium flow battery energy storage system, including a working stack, a rebalancing battery pack, an open-circuit voltage measurement battery, a programmable charging power supply, and a PLC. Its energy storage and rebalancing are two independent parts, each with an independent working stack (battery pack) and pipeline. That is, the working stack and its connected pipeline are used for energy storage, and the rebalancing battery pack and its connected pipeline are used for rebalancing. Although the disclosed device includes both an energy storage device and a rebalancing device, there are problems such as low rebalancing efficiency, and it requires more battery packs, pumps, pipelines, and equipment, increasing the hardware cost of the entire power station. There are also problems such as a large floor area, a large volume of the power station, and an increased maintenance difficulty.

[0005] Therefore, how to provide an integrated balancing device for regenerating the electrolyte capacity of a flow battery, making the energy storage and capacity regeneration processes integrated, while improving the efficiency of electrolyte capacity regeneration and also taking into account issues such as the volume, floor area, and cost of the power station. Summary of the Utility Model

[0006] In view of the deficiencies in the prior art, the present utility model provides an integrated balancing device for regenerating the electrolyte capacity of a flow battery, comprising a battery energy storage device and an electrolyte rebalancing device. The battery energy storage device and the electrolyte rebalancing device share a battery pack, a delivery pump, and pipelines, reducing the cost of power station equipment, decreasing the floor area, reducing the maintenance cost, and shortening the maintenance time. Moreover, compared with the situation where the number of energy storage battery packs in a common independent balancing device is much larger than that of the regenerative battery packs, the two share a battery pack, that is, the number of regenerative battery packs is the same as that of the energy storage battery packs, and the number of regenerative battery packs increases significantly, remarkably improving the efficiency of regenerating the electrolyte capacity.

[0007] To achieve this purpose, the present utility model adopts the following technical solutions:

[0008] An integrated balancing device for regenerating the electrolyte capacity of a flow battery, comprising a battery pack with an external circuit, and the battery pack is divided into a positive electrode chamber and a negative electrode chamber; the positive electrode chamber is connected in a cycle with a positive electrode liquid storage component; the negative electrode chamber is connected in a cycle with a negative electrode liquid storage component;

[0009] The integrated balancing device for regenerating the electrolyte capacity of the flow battery further comprises a regenerative liquid storage component and a gas-liquid absorption component. The outlet of the regenerative liquid storage component is connected to an opening of the negative electrode chamber, and the other opening of the negative electrode chamber is connected to the inlet of the gas-liquid absorption component.

[0010] As a preferred technical solution of the present utility model, the outlet of the positive electrode chamber is connected to the inlet of the positive electrode liquid storage component, the outlet of the positive electrode liquid storage component is connected to the inlet of the positive electrode chamber, and a positive electrode delivery pump is arranged at the outlet of the positive electrode liquid storage component.

[0011] As a preferred technical solution of the present utility model, a first valve is arranged at the outlet of the positive electrode chamber.

[0012] Preferably, a second valve is arranged at the inlet of the positive electrode delivery pump.

[0013] Preferably, a third valve is arranged at the outlet of the positive electrode delivery pump.

[0014] As a preferred technical solution of the present utility model, the outlet of the negative electrode chamber is connected to the inlet of the negative electrode liquid storage component, the outlet of the negative electrode liquid storage component is connected to the inlet of the negative electrode chamber, and a negative electrode delivery pump is arranged at the outlet of the negative electrode liquid storage component.

[0015] Preferably, the outlet of the regenerative liquid storage component is connected to the inlet of the negative electrode chamber, and the outlet of the negative electrode chamber is connected to the inlet of the gas-liquid absorption component.

[0016] As a preferred technical solution of the present utility model, a fourth valve is provided at the outlet of the negative electrode chamber.

[0017] Preferably, a fifth valve is provided between the inlet of the negative electrode chamber and the outlet of the negative electrode delivery pump.

[0018] As a preferred technical solution of the present utility model, a sixth valve is provided at the outlet of the negative electrode liquid storage component.

[0019] Preferably, a seventh valve is provided at the outlet of the regeneration liquid storage component.

[0020] In the present utility model, after the outlet pipelines of the sixth valve and the seventh valve are combined, they are connected to the negative electrode delivery pump.

[0021] As a preferred technical solution of the present utility model, an eighth valve is provided at the inlet of the negative electrode liquid storage component.

[0022] Preferably, a ninth valve is provided at the inlet of the gas-liquid absorption component.

[0023] In the present utility model, the outlet pipeline of the fourth valve branches into two pipelines, which are respectively connected to the inlet of the negative electrode liquid storage component and the inlet of the gas-liquid absorption component. Further, an eighth valve is provided at the inlet of the negative electrode liquid storage component, and a ninth valve is provided at the inlet of the gas-liquid absorption component.

[0024] As a preferred technical solution of the present utility model, the battery pack with an external circuit separates the positive and negative electrode electrolytes by an ion membrane.

[0025] As a preferred technical solution of the present utility model, the gas-liquid absorption component includes a spray tower.

[0026] As a preferred technical solution of the present utility model, the positive electrode liquid storage component is a positive electrode liquid storage tank, the negative electrode liquid storage component is a negative electrode liquid storage tank, and the regeneration liquid storage component is a regeneration liquid storage tank.

[0027] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0028] (1) The integrated balance device for regenerating the electrolyte capacity of the flow battery of the present utility model includes a battery energy storage device and an electrolyte rebalancing device. The two share a battery pack, a delivery pump, and pipelines, reducing the hardware investment in the number of cell stacks, delivery pumps, pipelines, and equipment, lowering the power station equipment cost, reducing the power station floor area, reducing the power station maintenance cost, and shortening the power station maintenance time;

[0029] (2) The integrated balancing device for regenerating the electrolyte capacity of the flow battery of the present utility model, compared with the situation in a common independent balancing device where the number of energy storage battery packs is much larger than that of the regenerative battery packs, shares one battery pack, that is, the number of regenerative battery packs is the same as that of the energy storage battery packs, and the number of regenerative battery packs increases significantly, significantly improving the efficiency of electrolyte capacity regeneration;

[0030] (3) The integrated balancing device for regenerating the electrolyte capacity of the flow battery of the present utility model can regenerate the electrolyte capacity by the rebalancing system when the battery capacity in the energy storage system decays, ensuring the long-term and efficient operation of the energy storage system, and the recycling of the electrolyte is more environmentally friendly. Description of the Drawings

[0031] Figure 1 It is a schematic structural diagram of the integrated balancing device for regenerating the electrolyte capacity of the flow battery in Embodiment 1 of the present utility model;

[0032] Figure 2 It is a schematic structural diagram of the split balancing device for regenerating the electrolyte capacity of the flow battery in Comparative Example 1 of the present utility model;

[0033] Among them, 1 - positive electrode liquid storage component, 2 - negative electrode liquid storage component, 3 - regenerative liquid storage component, 4 - gas-liquid absorption component, 5 - battery pack, 6 - external circuit, 7 - positive electrode delivery pump, 8 - negative electrode delivery pump, 9 - first valve, 10 - second valve, 11 - third valve, 12 - fourth valve, 13 - fifth valve, 14 - sixth valve, 15 - seventh valve, 16 - eighth valve, 17 - ninth valve, 18 - regenerative positive electrode delivery pump, 19 - regenerative negative electrode delivery pump, 20 - tenth valve, 21 - eleventh valve, 22 - twelfth valve, 23 - thirteenth valve, 24 - regenerative battery pack, 25 - second outlet, 26 - first outlet, 27 - second inlet, 28 - first inlet. Detailed Embodiments

[0034] To make the technical solutions, objectives and advantages of the present utility model clearer, the present utility model will be further described in detail below through specific embodiments in conjunction with the drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present utility model and are not used to limit the present utility model.

[0035] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0036] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. In the fields of electricity and communication, it can be a wired connection or a wireless connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0037] Embodiment 1

[0038] This embodiment provides an integrated balancing device for regenerating the electrolyte capacity of a flow battery, as Figure 1 shown. The integrated balancing device for regenerating the electrolyte capacity of the flow battery includes a battery pack 5 with an external circuit 6. The battery pack 5 is divided into a positive electrode chamber and a negative electrode chamber; the positive electrode chamber is connected in a cycle with a positive electrode liquid storage component 1; the negative electrode chamber is connected in a cycle with a negative electrode liquid storage component 2;

[0039] The integrated balancing device for regenerating the electrolyte capacity of the flow battery further includes a regenerated liquid storage component 3 and a gas-liquid absorption component 4. The outlet of the regenerated liquid storage component 3 is connected to an opening of the negative electrode chamber, and the other opening of the negative electrode chamber is connected to the inlet of the gas-liquid absorption component 4;

[0040] Among them, the outlet of the positive electrode chamber is connected to the inlet of the positive electrode liquid storage component 1, the outlet of the positive electrode liquid storage component is connected to the inlet of the positive electrode chamber, and a positive electrode delivery pump 7 is provided at the outlet of the positive electrode liquid storage component 1; a first valve 9 is provided at the outlet of the positive electrode chamber; a second valve 10 is provided at the inlet of the positive electrode delivery pump 7; a third valve 11 is provided at the outlet of the positive electrode delivery pump 7; the outlet of the negative electrode chamber is connected to the inlet of the negative electrode liquid storage component 2, the outlet of the negative electrode liquid storage component 2 is connected to the inlet of the negative electrode chamber, and a negative electrode delivery pump 8 is provided at the outlet of the negative electrode liquid storage component 2; the outlet of the regeneration liquid storage component 3 is connected to the inlet of the negative electrode chamber, and the outlet of the negative electrode chamber is connected to the inlet of the gas-liquid absorption component 4; a fourth valve 12 is provided at the outlet of the negative electrode chamber; a fifth valve 13 is provided between the inlet of the negative electrode chamber and the outlet of the negative electrode delivery pump 8; a sixth valve 14 is provided at the outlet of the negative electrode liquid storage component 2; a seventh valve 15 is provided at the outlet of the regeneration liquid storage component 3; an eighth valve 16 is provided at the inlet of the negative electrode liquid storage component 2; a ninth valve 17 is provided at the inlet of the gas-liquid absorption component 4; the battery pack with an external circuit separates the positive and negative electrode electrolytes by an ion membrane; the gas-liquid absorption component includes a spray tower; the positive electrode liquid storage component is a positive electrode liquid storage tank, the negative electrode liquid storage component is a negative electrode liquid storage tank, and the regeneration liquid storage component is a regeneration liquid storage tank.

[0041] To further illustrate the usage method of the integrated balance device for regenerating the electrolyte capacity of the flow battery in this embodiment, taking the energy storage and electrolyte capacity regeneration of the iron-chromium flow battery as an example:

[0042] The positive electrode liquid storage component 1 is a positive electrode liquid storage tank for storing the positive electrode electrolyte, the negative electrode liquid storage component 2 is a negative electrode liquid storage tank for storing the negative electrode electrolyte, the regeneration liquid storage component 3 is a regeneration liquid storage tank for storing the regeneration electrolyte, and the gas-liquid absorption component 4 is a spray tower;

[0043] (1) Solutions containing 1.0 mol / L CrCl 3 and 1.0 mol / L FeCl 2 and 2.0 mol / L HCl are stored in the negative electrode liquid storage tank and the positive electrode liquid storage tank respectively, and a 6 mol / L HCl solution is stored in the regeneration liquid storage tank;

[0044] (2) Energy storage cycle: Close the seventh valve and the ninth valve, open other valves, start the positive electrode delivery pump. The positive electrode electrolyte flows out from the positive electrode liquid storage tank, passes through the second valve, the positive electrode delivery pump, and the third valve in sequence, enters the positive electrode chamber of the battery pack, and then returns to the positive electrode liquid storage tank through the first valve after the reaction; start the negative electrode delivery pump. The negative electrode electrolyte flows out from the negative electrode liquid storage tank, passes through the sixth valve, the negative electrode delivery pump, and the fifth valve in sequence, enters the negative electrode chamber of the battery pack, and then returns to the negative electrode liquid storage tank through the fourth valve and the eighth valve after the reaction. Among them, the positive electrode reaction formula of the electrolyte in the battery pack during charge and discharge is: The negative electrode reaction formula is:

[0045] (3) Regeneration cycle: Close the sixth valve and the eighth valve, open other valves, start the positive electrode delivery pump. The positive electrode electrolyte flows out from the positive electrode liquid storage tank, passes through the second valve, the positive electrode delivery pump, and the third valve in sequence, enters the positive electrode chamber of the battery pack, and then returns to the positive electrode liquid storage tank through the first valve after the reaction; start the negative electrode delivery pump. The regenerated electrolyte flows out from the regeneration liquid storage tank, passes through the seventh valve, the negative electrode delivery pump, and the fifth valve in sequence, enters the negative electrode chamber of the battery pack, and the reacted gas and liquid then pass through the fourth valve and the ninth valve and enter the spray tower. The reacted solution is stored at the bottom of the spray tower and removed regularly. Among them, the input current directions of the positive and negative electrodes in the battery pack are opposite to those during the energy storage cycle, and the positive electrode reaction formula is: The negative electrode reaction formula is:

[0046] Comparative Example 1

[0047] This comparative example provides a split-type balancing device for regenerating the electrolyte capacity of a flow battery, as Figure 2 shown. The difference between the split-type balancing device for regenerating the electrolyte capacity of the flow battery in this comparative example and that in Example 1 is that the split-type balancing device for regenerating the electrolyte capacity of the flow battery is increased with a regeneration battery pack 24, and the regeneration battery pack 24 is divided into a positive electrode chamber and a negative electrode chamber; the inlet of the positive electrode chamber of the regeneration battery pack 24 is connected to the regeneration liquid storage component 3, and the outlet of the positive electrode chamber of the regeneration battery pack 24 is connected to the gas-liquid absorption component 4; the negative electrode chamber of the regeneration battery pack 24 is circularly connected to the positive electrode liquid storage component 1. Among them, the positive electrode liquid storage component 1 includes a first outlet 26, a second outlet 25, a first inlet 28, and a second inlet 27. The inlet of the negative electrode chamber of the regeneration battery pack 24 is connected to the second outlet 25 in the positive electrode liquid storage component 1, the outlet of the negative electrode chamber of the regeneration battery pack 24 is connected to the second inlet 27 in the positive electrode liquid storage component 1, the inlet of the positive electrode chamber of the battery pack 5 is connected to the first outlet 26 in the positive electrode liquid storage component 1, and the outlet of the positive electrode chamber of the battery pack 5 is connected to the first inlet 28 in the positive electrode liquid storage component 1;

[0048] A regeneration positive electrode delivery pump 18 is provided at the outlet of the regeneration liquid storage component 3, and the seventh valve 15 is provided between the regeneration liquid storage component 3 and the regeneration positive electrode delivery pump 18. A regeneration negative electrode delivery pump 19 is provided at the second outlet 25 of the positive electrode liquid storage component 1, and the eleventh valve 21 is provided between the positive electrode liquid storage component 1 and the regeneration negative electrode delivery pump 19. The twelfth valve 22 is provided at the outlet of the negative electrode chamber in the regeneration battery pack 24, and the thirteenth valve 23 is provided at the outlet of the regeneration negative electrode delivery pump 19. Neither the battery pack 5 nor the regeneration battery pack 24 has an external circuit, and the positive and negative electrolytes are separated by an ion membrane. The rest is the same as in Embodiment 1.

[0049] For the energy storage and electrolyte capacity regeneration of an iron-chromium flow battery, the usage method of the split-type balancing device for the electrolyte capacity regeneration of the flow battery in this comparative example is further described as follows:

[0050] The difference in the usage method of the device in this comparative example and Embodiment 1 lies in that during the regeneration cycle in step (3), the battery pack, the positive electrode delivery pump, the negative electrode delivery pump, the first valve, the second valve, the third valve, the fourth valve, the fifth valve, and the sixth valve are closed, and other valves are opened. The regeneration positive electrode delivery pump is started, and the regenerated electrolyte flows out of the regeneration liquid storage tank and sequentially passes through the seventh valve, the regeneration positive electrode delivery pump, and the tenth valve and enters the positive electrode chamber of the regeneration battery pack. The reacted gas and liquid then pass through the ninth valve and enter the spray tower. The reacted solution is stored at the bottom of the spray tower and is removed regularly. The regeneration negative electrode delivery pump is started, and the positive electrode electrolyte flows out of the positive electrode liquid storage tank and sequentially passes through the eleventh valve, the regeneration negative electrode delivery pump, and the thirteenth valve and enters the negative electrode chamber of the regeneration battery pack. After the reaction, it then returns to the positive electrode liquid storage tank through the twelfth valve. The rest is the same as in Embodiment 1.

[0051] Both Embodiment 1 and Comparative Example 1 can achieve energy storage and electrolyte capacity regeneration. By comparison, it can be seen that the split-type device in Comparative Example 1 significantly increases the number of regeneration battery packs, delivery pumps, valves, and pipelines, thereby increasing the equipment cost of the power station, the maintenance cost of the power station, and the maintenance time of the power station.

[0052] In addition, the integrated balancing device for the electrolyte capacity regeneration of the flow battery of the present invention is not limited to the iron-chromium flow battery, and is also applicable to the energy storage and electrolyte capacity regeneration of aqueous flow batteries such as all-vanadium flow batteries.

[0053] In summary, the present utility model provides an integrated balancing device for regenerating the electrolyte capacity of a flow battery, which includes a battery energy storage device and an electrolyte rebalancing device. The battery energy storage device and the electrolyte rebalancing device share a battery pack, a delivery pump, and pipelines, reducing the cost of power station equipment, the floor area, the maintenance cost, and shortening the maintenance time. Moreover, compared with the situation where the number of energy storage battery packs in a common independent balancing device is much larger than that of the regenerative battery packs, the two share a battery pack, that is, the number of regenerative battery packs is the same as that of the energy storage battery packs, and the number of regenerative battery packs increases significantly, significantly improving the efficiency of electrolyte capacity regeneration.

[0054] The above is only the specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present utility model fall within the protection scope and the disclosure scope of the present utility model.

Claims

1. An integrated balancing device for regenerating electrolyte capacity of a flow battery, characterized in that: The integrated balancing device for regenerating electrolyte capacity of a flow battery comprises a battery pack with an external circuit, wherein the battery pack is divided into a positive electrode chamber and a negative electrode chamber; the positive electrode chamber is cyclically connected to a positive electrode liquid storage component; the negative electrode chamber is cyclically connected to a negative electrode liquid storage component; The integrated balancing device for regenerating the electrolyte capacity of the liquid flow battery also includes a regeneration liquid storage component and a gas-liquid absorption component, wherein the outlet of the regeneration liquid storage component is connected to an opening of the negative electrode chamber, and the other opening of the negative electrode chamber is connected to the inlet of the gas-liquid absorption component.

2. The integrated balancing device for regenerating electrolyte capacity of a flow battery according to claim 1, characterized in that: The outlet of the positive electrode chamber is connected to the inlet of the positive electrode liquid storage component, the outlet of the positive electrode liquid storage component is connected to the inlet of the positive electrode chamber, and a positive electrode delivery pump is arranged at the outlet of the positive electrode liquid storage component.

3. The integrated balancing device for regenerating electrolyte capacity of a flow battery according to claim 2, characterized in that: A first valve is provided at the outlet of the positive electrode chamber; A second valve is provided at the inlet of the cathode delivery pump; A third valve is arranged at the outlet of the cathode delivery pump.

4. The integrated balancing device for regenerating electrolyte capacity of a flow battery according to claim 1, characterized in that: The outlet of the negative electrode chamber is connected to the inlet of the negative electrode liquid storage component, the outlet of the negative electrode liquid storage component is connected to the inlet of the negative electrode chamber, and a negative electrode delivery pump is arranged at the outlet of the negative electrode liquid storage component; The outlet of the regeneration liquid storage component is connected to the inlet of the negative electrode chamber, and the outlet of the negative electrode chamber is connected to the inlet of the gas-liquid absorption component.

5. The integrated balancing device for regenerating electrolyte capacity of a flow battery according to claim 4, characterized in that: A fourth valve is provided at the outlet of the negative electrode chamber; A fifth valve is disposed between the inlet of the negative electrode chamber and the outlet of the negative electrode delivery pump.

6. The integrated balancing device for regenerating electrolyte capacity of a flow battery according to claim 4, characterized in that: A sixth valve is provided at the outlet of the negative electrode liquid storage component; A seventh valve is provided at the outlet of the regeneration liquid storage component.

7. The integrated balancing device for regenerating electrolyte capacity of a flow battery according to claim 4, characterized in that: An eighth valve is provided at the inlet of the negative electrode liquid storage component; A ninth valve is provided at the inlet of the gas-liquid absorption component.

8. The integrated balancing device for regenerating electrolyte capacity of a flow battery according to claim 1, characterized in that: The battery pack with an external circuit has an ion membrane that separates the positive and negative electrolytes.

9. The integrated balancing device for regenerating electrolyte capacity of a flow battery according to claim 1, characterized in that: The gas-liquid absorption component includes a spray tower.

10. The integrated balancing device for regenerating electrolyte capacity of a flow battery according to claim 1, characterized in that: The positive electrode liquid storage component is a positive electrode liquid storage tank, the negative electrode liquid storage component is a negative electrode liquid storage tank, and the regeneration liquid storage component is a regeneration liquid storage tank.

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