A storage tank device for reducing electrolyte mixing loss

Abstract

This invention discloses a storage tank device for reducing electrolyte mixing losses. It includes a main tank body equipped with a pressure relief valve, an electrolyte inflow pipe at the top, and an electrolyte outlet pipe at the bottom. An inner core partition is fixed inside the main tank body, communicating with the electrolyte outlet pipe. Nested rotor and stator partitions are fitted around the outer side of the inner core partition. Both the rotor and stator partitions are cylindrical, with the stator partition fixed to the main tank body. The rotor partition is driven by a motor fixed to the outside of the main tank body. The rotor and stator partitions have multiple through holes of different heights. This invention allows for the selective use of electrolytes at different charge states in different layers of the storage tank by rotating the rotor partitions. This enables the priority use of electrolytes more suitable for the current operating conditions during charge / discharge switching, thereby achieving more efficient operation of the fuel cell stack.

Description

Technical Field

[0001] This invention relates to the field of flow battery technology, and more specifically to a storage tank device for reducing electrolyte mixing losses. Background Technology

[0002] With the continued depletion of fossil fuels and increasing attention to environmental issues, new energy sources, such as wind and solar power, are increasingly participating in the current energy system. However, new energy power generation is highly susceptible to fluctuations due to changes in natural conditions. This instability not only leads to energy waste but also affects grid stability as the proportion of new energy power in the grid increases. Under these circumstances, the construction of energy storage devices to support new energy power generation equipment becomes necessary and urgent. The power-capacity decoupling characteristic of flow batteries allows for modular design of flow battery stacks, perfectly meeting the needs of new energy storage.

[0003] In the operation of a flow battery, the electrolyte flows from the storage tank, reacts at the electrodes, and then flows back to the storage tank. The state of charge (SOC) of the electrolyte in the storage tank differs from that of the electrolyte flowing back to the storage tank. Electrolytes with different SOCs mix within the storage tank, causing additional losses in the system. This electrolyte mixing primarily arises from two sources: firstly, the convection effect caused by the pump pumping electrolyte out of the storage tank; and secondly, the diffusion of ions driven by concentration gradients. During operation, the SOC of the electrolyte in different layers of the storage tank may vary, thus this diffusion effect is widespread within the tank. Furthermore, during charge-discharge switching in the battery stack, the electrolyte in the upper layers of the storage tank is more favorable for the subsequent operating conditions. Traditional storage tank designs typically only allow electrolyte to be drawn from bottom to top.

[0004] In the prior art, patent document (CN107946617A) discloses a four-tank flow battery structure and method for improving electrolyte utilization. Each of the positive electrolyte inlet, negative electrolyte inlet, positive electrolyte outlet, and negative electrolyte outlet is connected to an independent storage tank. This flow battery structure can reduce concentration polarization between the stack and the storage tanks. Patent document (CN210200875U) discloses a flow battery electrolyte storage tank and flow battery system. The tank bodies are connected by movable connectors, thereby achieving communication and closure between adjacent electrolyte storage spaces. While a four-tank system reduces electrolyte mixing losses, it requires twice the number of pumps or pump sets, storage tanks, and supporting facilities. The aforementioned single-tank design (CN210200875U) places high demands on some components and cannot handle electrolytes in different states of charge. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a storage tank structure that can reduce electrolyte mixing loss.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: a storage tank device for reducing electrolyte mixing loss, comprising a main tank body, a pressure relief valve, an electrolyte inflow pipe at the top of the main tank body, an electrolyte outlet pipe at the bottom, an inner core partition fixed inside the main tank body, the interior of the inner core partition body communicating with the electrolyte outlet pipe, and a rotor partition and a stator partition nested together on the outer side of the inner core partition body, both the rotor partition and the stator partition being cylindrical, the stator partition being fixed inside the main tank body, and the rotor partition being driven by a motor fixed outside the main tank body; the rotor partition and the stator partition are respectively provided with multiple through holes of different heights, and when the rotor partition rotates relative to the stator partition, the corresponding through holes are interconnected or not interconnected according to the overlapping state.

[0007] Preferably, the stator baffle is disposed inside the rotor baffle. The baffle is used to reduce the convection and diffusion of the electrolyte inside the tank.

[0008] Preferably, the rotor partition and the stator partition are provided with three through holes of different heights, located at the upper, middle and lower parts respectively.

[0009] Preferably, the electrolyte inflow pipe is located inside the main tank and has an electrolyte outlet nozzle at its inlet. The electrolyte outlet nozzle is used to reduce the disturbance effect of the flowing electrolyte.

[0010] Preferably, the pressure relief valve is a one-way valve, used to release the gas balance pressure of the storage tank and prevent external gas from entering the storage tank.

[0011] Preferably, the height of both the rotor partition and the stator partition is higher than that of the inner core partition.

[0012] This invention also provides another storage tank device for reducing electrolyte mixing losses, comprising a main tank body equipped with a pressure relief valve, an electrolyte inflow pipe at the top of the main tank body, an electrolyte outlet pipe at the bottom, an inner core partition inside the main tank body driven by a motor fixed to the outside of the main tank body, the interior of the inner core partition body communicating with the electrolyte outlet pipe; at least one compartmentalized partition for dividing the main tank body into multiple chambers is provided on the outside of the inner core partition body, the compartmentalized partition body being fixed to the main tank body; a through hole is provided at the bottom of the inner core partition body, the through hole communicating with different chambers as the inner core partition body rotates, a diversion device is provided at the outlet of the electrolyte inflow pipe, the diversion device communicating with different chambers controlled by a valve; the through hole at the bottom of the inner core partition body can be rotated by a motor to communicate with different chambers, thereby selectively using electrolytes in different charge states in different chambers.

[0013] Preferably, the outer side of the inner core partition is evenly distributed with four compartmentalized partitions for dividing the main tank into four chambers.

[0014] Preferably, the outlet end of the diversion device is provided with an electrolyte outlet nozzle, and the electrolyte outlet nozzle is provided with multiple branch nozzles communicating with different chambers, and each branch nozzle is provided with a solenoid valve.

[0015] Preferably, the pressure relief valve is a one-way valve.

[0016] This invention provides a storage tank structure to reduce the mixing of electrolytes in different states of charge within the tank and to selectively utilize electrolytes in different states of charge, thereby improving the operating efficiency of the fuel cell stack. This storage tank reduces the convection of the electrolyte within the tank and the concentration difference and diffusion area between different electrolyte layers, thus reducing the mixing of electrolytes in different states of charge and lowering mixing losses within the tank. A rotating component allows for the selective use of electrolytes in different states of charge, enabling efficient operation of the fuel cell stack during charge-discharge switching.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] 1. The baffle can mitigate the disturbance to the electrolyte in the storage tank when the pump draws the electrolyte out of the tank. The nozzle at the outlet of the electrolyte inflow pipe can also mitigate the disturbance to the electrolyte in the tank caused by the incoming electrolyte. The baffle also extends the flow distance of the electrolyte in the storage tank, reducing the concentration gradient between electrolytes and the cross-sectional area of ​​diffusion between different layers of electrolyte. In summary, by reducing convection effects and electrolyte diffusion, the mixing effect between electrolytes of different charge states is reduced, thus reducing the losses caused by the mixing of electrolytes of different charge states and improving system efficiency.

[0019] 2. The top of the storage tank is connected to a pressure relief valve, which can promptly release any gases that may be generated (such as hydrogen evolution on the negative electrode side of an iron-chromium flow battery) to maintain the pressure balance inside and outside the storage tank, which is beneficial to the safe use of the storage tank.

[0020] 3. The rotor partition and stator partition have through holes at different heights. A driving component is designed to drive the rotor partition to rotate. By rotating, the through holes on the rotor partition can be aligned with the through holes at different heights on the stator partition, and the electrolyte can only flow through the aligned through holes. In another optional structure of the present invention, a through hole is opened at the bottom of the inner core partition. By rotating the inner core partition, its bottom through hole can be connected to different chambers. Through the above operation, electrolytes in different states of charge in different areas of the storage tank can be selectively used. Therefore, when the stack is switching between charging and discharging, the electrolyte that is more suitable for the current operating state can be used first, which is beneficial to improving system efficiency. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the liquid storage tank device provided in Example 1;

[0022] Figure 2 An exploded view of the liquid storage tank device provided in Example 1;

[0023] Figure 3 A cross-sectional view of the main view of the liquid storage tank device when the bottom through holes of the rotor partition and the stator partition are aligned;

[0024] Figure 4 for Figure 3 Cross-sectional view from the left at a 45° angle;

[0025] Figure 5 A cross-sectional view of the main view of the liquid storage tank device when the center through holes of the rotor partition and the stator partition are aligned;

[0026] Figure 6 for Figure 5 Cross-sectional view of the left side;

[0027] Figure 7 for Figure 6 A magnified view of part I;

[0028] Figure 8 for Figure 6 A magnified view of a section II;

[0029] Figure 9 A cross-sectional view of the main view of the liquid storage tank device when the high-level through holes of the rotor diaphragm and stator diaphragm are aligned;

[0030] Figure 10 for Figure 9 The left view of the main tank after it has been hidden;

[0031] Figure 11 A front view of the liquid storage tank device provided in Example 2;

[0032] Figure 12 for Figure 11 The left view;

[0033] Figure 13 for Figure 11 Top view of the cross-section;

[0034] Figure 14 This is a schematic diagram of the flow diversion device;

[0035] In the above figures, the arrows indicate the flow path of the electrolyte. Detailed Implementation

[0036] To make the present invention more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings.

[0037] Example 1

[0038] like Figure 1 , 2 As shown, this embodiment provides a storage tank device for reducing electrolyte mixing losses. It includes a main tank body 5, a pressure relief valve 2 (using a one-way valve) on the main tank body 5, an electrolyte inflow pipe 31 at the top of the main tank body 5 (the inflow pipe 31 is located inside the main tank body 5 and has an electrolyte outlet nozzle 4 at its opening), and an electrolyte outlet pipe 32 at the bottom. An inner core partition 8 is fixed inside the main tank body 5, and the interior of the inner core partition 8 communicates with the electrolyte outlet pipe 32. A rotor partition 6 and a stator partition 7 (the stator partition 7 is located inside the rotor partition 6) are nested on the outside of the inner core partition 8. Both the rotor partition 6 and the stator partition 7 are cylindrical. The stator partition 7 is fixed inside the main tank 5, and the rotor partition 6 is driven by a motor 1 fixed to the outside of the main tank 5. The rotor partition 6 and the stator partition 7 are each provided with three through holes of different heights (located at the top, middle, and bottom, respectively, and each through hole is on a different vertical line; that is, when one set of through holes corresponds, the other two sets are not connected. This rule is still preferred when there are three or fewer sets of through holes). When the rotor partition 6 rotates relative to the stator partition 7, the corresponding through holes may or may not connect depending on their overlapping state. The height of both the rotor partition 6 and the stator partition 7 is higher than that of the inner core partition 8.

[0039] The size of the connection holes on the main tank depends on the requirements of the system and the connected components, and all connections between the main tank and the outside must be sealed. The bottom through holes on the stator baffle and rotor baffle should be as close as possible to the bottom of the storage tank to maximize the use of the electrolyte stored in the storage tank. The diameter of the rotor baffle should be slightly larger than that of the stator baffle, and the spacing between the two should only be sufficient to ensure that the rotation of the rotor baffle is not hindered by the stator baffle, and should not be too large. The electrolyte outlet nozzle has a fixed height, and its installation height is slightly higher than the electrolyte level in the main tank.

[0040] The operation process of the above device is as follows:

[0041] 1. When the fuel cell stack is in a continuous charging or discharging state, the bottom through holes of the rotor partition and stator partition are aligned. When the lower through holes of both are aligned, the corresponding through holes in the middle and upper parts are not connected. In this case, the electrolyte can only pass through the lower through holes. Refer to the appendix for the electrolyte flow path. Figure 3 , 4At this point, the electrolyte flows into the main tank through the electrolyte inlet pipe. First, it enters the space between the rotor partition and the main tank. Then, it passes through the through-holes at the bottom of the rotor and stator partitions into the space between the stator partition and the inner core partition. Afterward, it enters the space within the inner core partition through the gap between the upper inner core partition and the rotor partition, and finally exits the main tank through the electrolyte outlet pipe. Taking the charging state as an example, during operation, the state of charge of the electrolyte in the storage tank gradually decreases along the electrolyte flow direction. Therefore, the fuel cell stack always uses the portion of electrolyte with the lowest state of charge in the storage tank, which is most beneficial for the current charging process.

[0042] Assuming the system is currently in a charging state, the state of charge of the electrolyte in the storage tank gradually decreases along the electrolyte flow direction. If the system then transitions from a charging to a discharging state, the electrolyte with a higher state of charge near the electrolyte inlet is more suitable for the current stack requirements. Traditionally designed stacks can only utilize the electrolyte in the storage tank at this point, which is currently in a lower state of charge. However, the stack structure designed in this embodiment allows the rotor partition to rotate via a motor until its top through-hole connects with the top through-hole of the stator partition. At this point, the flow path of the electrolyte in the storage tank is as follows... Figure 9 , 10 As shown; the volume of the inner core partition is relatively small. After a small amount of electrolyte is removed from the interlayer between the inner core partition and the stator partition, the electrolyte in a high-charge state in the interlayer between the rotor partition and the main tank wall in the area above the upper opening of the rotor partition can be taken.

[0043] During operation, the fuel cell stack may need to temporarily change its operating conditions. For example, the fuel cell stack may be switched to discharging for a short period of time during the charging process, and then the previous charging process may continue after the discharging task is completed.

[0044] See Figure 3 Before the change of operating conditions, the fuel cell stack is in a continuous charging process. As described in the above description of continuous charging, the rotor partition and stator partition have their lower through-holes aligned. Furthermore, the state of charge of the electrolyte in the storage tank gradually decreases along the electrolyte flow direction. For a short discharge period, it is preferable to use electrolyte with a higher state of charge closer to the electrolyte inlet. Therefore, the first step is to control the motor to drive the rotor partition to rotate until its top through-hole connects with the top through-hole of the stator partition. At this point, the flow path of the electrolyte in the storage tank is as follows... Figure 9As shown; after a brief discharge cycle, the fuel cell stack resumes its previous charging cycle. At this point, it's not necessary to immediately restore the rotor and stator partitions to their bottom-connected state. This is because during the previous discharge, the electrolyte in the space near the electrolyte inlet was electrolyte that had flowed back after the discharge process. The state of charge of this electrolyte is lower than that of the electrolyte in other areas of the storage tank. Therefore, after the fuel cell stack switches from discharge to charging, the storage tank maintains the state changed in the first step until the low-charge electrolyte that flowed in during the discharge process is consumed. The second step involves controlling the motor to drive the rotor partition to rotate until its bottom through-hole connects with the bottom through-hole of the stator partition. During the subsequent continuous charging process, the state inside the storage tank remains unchanged.

[0045] 2. If the operating conditions of the fuel cell stack are temporarily changed during operation, taking the temporary change from charging to discharging as an example, the duration of this discharge is relatively long, that is, the amount of electrolyte circulating in the storage tank during this discharge is higher than the amount of electrolyte stored in the area above the top through hole, and the duration of the discharge condition is unknown.

[0046] When the discharge duration is unknown, the first step is to control the motor to drive the rotor partition to connect with the top through hole of the stator partition. At this time, the flow path of the electrolyte in the storage tank is as follows: Figure 3 As shown. If the discharge process has already ended before the electrolyte in a lower state of charge flows into the top through-hole during the discharge process, then only the same steps as in step 1 above need to be performed. If the discharge process has not ended before the electrolyte in a lower state of charge flows to the top through-hole, the second step requires controlling the motor to drive the rotor partition to rotate until it connects with the middle through-hole of the stator partition (e.g., Figure 5-8 As shown in the diagram, because at this time, the electrolyte in the interlayer space between the rotor baffle and the inner wall of the main tank, between the top and middle through holes, has the highest state of charge in the storage tank. The flow path of the electrolyte in the storage tank at this time is as follows: Figure 5 As shown. During the discharge process following the second step, if the discharge process ends before the electrolyte flowing into the storage tank reaches the central through-hole, then maintain the current state for a period after the discharge process ends until the charging condition consumes all the electrolyte in a lower state of charge above the central through-hole. In the third step, adjust the rotor partition to align it with the bottom through-hole of the stator partition. If the discharge process has not ended when the electrolyte flowing into the storage tank reaches the central through-hole, then the third step is to immediately adjust the rotor partition to align it with the bottom through-hole of the stator partition as soon as the electrolyte in a lower state of charge reaches the central through-hole. See also... Figure 1 Three through holes are provided at the top, middle and bottom of the rotor partition and the stator partition. More through holes can be provided as needed during actual operation. When there are more through holes, the operation of the three through holes mentioned above can be adjusted.

[0047] When the discharge duration is known, the alignment of the through holes at the corresponding positions of the rotor partition and stator partition can be directly adjusted using the electrolyte required for the discharge time.

[0048] Example 2

[0049] like Figure 11-13 As shown, this embodiment provides a storage tank device for reducing electrolyte mixing losses. It includes a main tank body 5, a pressure relief valve 2 (using a one-way valve) on the main tank body 5, an electrolyte inflow pipe 31 at the top, and an electrolyte outlet pipe 32 at the bottom. An inner core partition 8 is installed inside the main tank body 5, driven by a motor 1 fixed to the outside of the main tank body 5. The inner core partition 8 communicates with the electrolyte outlet pipe 32. Four compartmentalized partitions 9 are evenly distributed on the outer side of the inner core partition 8 to divide the main tank body 5 into four chambers (a, b, c, and d), and these partitions 9 are fixed inside the main tank body 5. A through hole is provided at the bottom of the inner core partition 8, which communicates with different chambers as the inner core partition 8 rotates. A diversion device (such as...) is provided at the outlet of the electrolyte inflow pipe 31. Figure 14 As shown, the diversion device has four outlet ends (located above four chambers respectively). Different outlet ends are connected to different chambers by solenoid valves. Each of the four outlet ends is equipped with an electrolyte outlet nozzle 4. The electrolyte outlet nozzle 4 has multiple branch nozzles connected to different chambers. Each branch nozzle is equipped with a solenoid valve. The opening and closing of the corresponding branch nozzle port is controlled by controlling the solenoid valve. Under normal operating conditions, the solenoid valve is in the normally closed state. When electrolyte needs to flow out from the corresponding port, the solenoid valve on it opens. The bottom of the inner core partition 8 has a through hole that can be driven by a motor to rotate and connect the through hole to different chambers to selectively use electrolyte in different charge states in different chambers.

[0050] The through-hole at the bottom of the inner core partition 8 should be as close as possible to the bottom of the storage tank to maximize the utilization of the electrolyte stored in the tank. The electrolyte outlet nozzle can also be configured with an adjustable height mounting structure.

[0051] Initially, the electrolyte is contained in three chambers: a, b, and c, while d is an empty cavity. During continuous charging and discharging, in the first stage: the motor drives the inner core partition to rotate, connecting its lower opening to chamber a. At this time, the fuel cell uses the electrolyte from chamber a. The electrolyte flowing into the storage tank via the electrolyte inlet pipe flows into chamber d, thus preventing the electrolyte in chamber d from coming into contact with and mixing with the electrolytes in chambers a, b, and c, which are in different states of charge. After all the electrolyte in chamber a has passed through the fuel cell and flowed into chamber d, the second stage begins: the motor drives the inner core partition to rotate, connecting its lower opening to chamber b. At this time, the fuel cell uses the electrolyte from chamber b, while the electrolyte flowing into the storage tank flows into chamber a. In continuous charging or discharging, subsequent stages can proceed in the order of chambers c, d, a, b, c… and chambers flowing into chambers can proceed in the order of chambers b, c, d, a, b… When switching between charging and discharging, the corresponding sequence needs to be changed.

[0052] During operation, the fuel cell stack needs to temporarily change its operating conditions. For example, during charging, the stack may briefly switch to discharging, and after discharging, it may resume the previous charging process. The inner core partition rotates to connect its lower end through-hole sequentially to chambers c, d, a, b, c… These connected chambers are the electrolyte outflow chambers, while the corresponding electrolyte inflow chambers are arbitrarily selected (b, c, d, a, b…). Assuming the stack switches from charging to discharging, the electrolyte outflow is chamber c, and the electrolyte inflow is chamber b. The first step during this transition is as follows: the motor drives the inner core partition to rotate, connecting its lower end through-hole to chamber b. Simultaneously, the electrolyte inflow pipe and outlet nozzle are adjusted to change the electrolyte inflow chamber from b to c. When the current and electrolyte flow rate are the same during the discharge and charging processes, the state of charge of the electrolyte flowing back to chamber C under discharge conditions is exactly the same as that of the remaining electrolyte in chamber C. Therefore, there will be no loss caused by mixing electrolytes with different states of charge. After the discharge process is completed, the second step is performed: the motor drives the inner core partition to rotate, so that the through hole at the lower end of the partition connects to chamber C. At the same time, the electrolyte inflow pipe and electrolyte outflow nozzle are adjusted to change the electrolyte inflow chamber from chamber C to chamber B. Then, the inflow and outflow chambers can be changed sequentially according to the order of the previous charging process for subsequent charging.

[0053] During the operation of the fuel cell stack, the operating conditions are temporarily changed. Taking the temporary change from charging to discharging as an example, the duration of this discharge is relatively long, meaning that the amount of electrolyte circulating in the storage tank during this discharge period is higher than the amount of electrolyte stored in the area above the top through-hole, and the duration of the discharge condition is unknown. During continuous charging, the through-hole at the lower end of the inner core partition is sequentially connected to chambers c, d, a, b, c..., and the electrolyte flows into chambers b, c, d, a, b... in sequence. Assuming that during the charge-discharge switch, the electrolyte flows out of chamber c and flows into chamber b, the order of the state of charge of the electrolyte in the four chambers from high to low is: chambers b, a, d, c, b... When the fuel cell stack changes from charging to discharging, the electrolyte supply to the fuel cell stack should be... The electrolyte with a higher state of charge is prioritized for supply. When the state of discharge is switched, the electrolyte flows out of chambers b, a, d, c, b... and the electrolyte flows out of chambers c, b, a, d, c... When the discharge condition ends and the charging condition is switched on, the electrolyte flow out of the chambers and the electrolyte flow in the chambers are swapped. The sequence of switching between electrolyte flow in the chambers and electrolyte flow out of the chambers is the opposite of that in the discharge condition, but the same as that in the first stage of the charging process.

[0054] When the duration of the discharge condition is known, the procedure for the device in this embodiment is the same as when the duration of the discharge condition is unknown.

Claims

1. A liquid storage tank device for reducing mixing loss of electrolyte, characterized by comprising: The application relates to a main tank (5) provided with a pressure relief valve (2), a top electrolyte inflow pipe (31) and a bottom electrolyte outlet pipe (32), and a core partition plate (8) fixed in the main tank (5), the inside of the core partition plate (8) being communicated with the electrolyte outlet pipe (32), the outside of the core partition plate (8) being sleeved with a rotor partition plate (6) and a stator partition plate (7) which are nested with each other, the rotor partition plate (6) and the stator partition plate (7) are both cylindrical, the stator partition plate (7) is fixed in the main tank (5), and the rotor partition plate (6) is driven by a motor (1) fixed outside the main tank (5); a plurality of through holes with different heights are arranged on the rotor partition plate (6) and the stator partition plate (7) correspondingly, and the corresponding through holes are communicated or not communicated with each other according to the overlapping state when the rotor partition plate (6) rotates relative to the stator partition plate (7).

2. The electrolyte loss reducing reservoir apparatus of claim 1, wherein, The stator partition plate (7) is arranged in the rotor partition plate (6).

3. The electrolyte storage tank apparatus of claim 1, wherein Three through holes with different heights are arranged on the rotor partition plate (6) and the stator partition plate (7) correspondingly and are located at the upper part, the middle part and the lower part respectively.

4. The electrolyte solution tank apparatus of claim 1, wherein An electrolyte outlet nozzle (4) is arranged on the pipe opening of the electrolyte inflow pipe (31) in the main tank (5).

5. The electrolyte loss reducing reservoir apparatus of claim 1, wherein, The pressure relief valve (2) is a one-way valve.

6. The electrolyte loss reducing reservoir apparatus of claim 1, wherein, The heights of the rotor partition plate (6) and the stator partition plate (7) are higher than that of the core partition plate (8).

7. A liquid storage tank device for reducing mixing loss of electrolyte, characterized by The application relates to a main tank (5) provided with a pressure relief valve (2), a top electrolyte inflow pipe (31) and a bottom electrolyte outlet pipe (32), and a core partition plate (8) fixed in the main tank (5), the inside of the core partition plate (8) being communicated with the electrolyte outlet pipe (32), the outside of the core partition plate (8) being sleeved with a rotor partition plate (6) and a stator partition plate (7) which are nested with each other, the rotor partition plate (6) and the stator partition plate (7) are both cylindrical, the stator partition plate (7) is fixed in the main tank (5), and the rotor partition plate (6) is driven by a motor (1) fixed outside the main tank (5); a plurality of through holes with different heights are arranged on the rotor partition plate (6) and the stator partition plate (7) correspondingly, and the corresponding through holes are communicated or not communicated with each other according to the overlapping state when the rotor partition plate (6) rotates relative to the stator partition plate (7).

8. The electrolyte loss reducing reservoir apparatus of claim 7, wherein, Four chamber partition plates (9) are uniformly arranged on the outside of the core partition plate (8) and are used for separating the main tank (5) into four chambers.

9. The liquid reservoir assembly of claim 7, wherein the liquid reservoir assembly is configured to reduce mixing losses of the electrolyte solution. An electrolyte outlet nozzle (4) is arranged on the outlet end of the shunt device, the electrolyte outlet nozzle (4) is provided with a plurality of branch nozzles communicated with different chambers, and each branch nozzle is provided with an electromagnetic valve.

10. The electrolyte storage tank apparatus of claim 7, wherein The pressure relief valve (2) is a one-way valve.

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