Alternating circulation mixed acid apparatus, method and system for a flow battery

Abstract

This invention relates to an alternating cycle acid mixing device, method, and system for flow batteries. The device includes: a first storage tank, a second storage tank, a finished product tank, a delivery pipeline communicating with the first, second, and finished product tanks, a filling pump, a homogenizing pump, a delivery pump, and a valve assembly installed on the delivery pipeline. The homogenizing pump generates negative pressure to draw in the acid solution, achieving high-shear mixing of the two acids. The homogenizing pump includes a first inlet, a second inlet, and an outlet located on the side of the pump body. The valve assembly switches the flow direction of the delivery pipeline, enabling switching between different working stages of acid mixing and continuous operation of the alternating cycle acid mixing process. This invention simplifies the structure by alternating the first and second storage tanks and utilizing the homogenizing pump to achieve self-priming high-shear mixing of the acid. Furthermore, the valve assembly improves production continuity and equipment utilization by switching the storage tanks, achieving high-efficiency production.

Description

Technical Field

[0001] This invention belongs to the field of flow battery technology, specifically relating to a method and apparatus for alternating cycle mixing of acids in a flow battery. Background Technology

[0002] Vanadium redox flow batteries, as a large-scale energy storage technology, offer advantages such as high safety, long cycle life, and scalable capacity. To improve the energy density and electrochemical activity of the electrolyte, mixed acid systems (such as adding hydrochloric acid or organic acids to sulfuric acid) have become a research hotspot in the industry. Mixed acid solutions can significantly increase the solubility of vanadium ions and broaden the battery's operating temperature window.

[0003] However, different acids vary significantly in density and viscosity, and traditional acid mixing techniques typically employ mechanical agitators within storage tanks. This method is inefficient, relying entirely on macroscopic convection and diffusion, often requiring hours or even longer of stirring to achieve microscopic homogeneity. Furthermore, traditional mixing equipment has complex sealing structures, posing a risk of leakage for volatile acids (such as hydrochloric acid). Additionally, some equipment uses dual tanks and circulating pumps for mixing, with mixing, output, and injection processes performed in series. However, equipment switching is discontinuous, resulting in long downtime and low production efficiency.

[0004] Therefore, it is necessary to propose a new alternating cycle mixed acid device, method, and system for flow batteries. Summary of the Invention

[0005] Based on the aforementioned problems in the existing technology, the purpose of this invention is to provide an alternating cycle acid mixing device for a flow battery. This device uses a first storage tank and a second storage tank to alternately cycle the acid, and utilizes a homogenizing pump to achieve self-aspiration shear mixing of the acid. This simplifies the structure, and the process of switching storage tanks through a valve assembly improves production continuity and equipment utilization, thereby achieving high-efficiency production.

[0006] The technical solution adopted by this invention to solve its technical problem is: an alternating cycle acid mixing device for a flow battery, comprising: a first storage tank, a second storage tank, a finished product tank, a conveying pipeline connected to the first storage tank, the second storage tank, and the finished product tank, a filling pump, a homogenizing pump, a conveying pump, and a valve assembly disposed on the conveying pipeline. The homogenizing pump is used to generate negative pressure to draw in acid solution, thereby achieving uniform mixing of the two acid solutions. The homogenizing pump includes a first inlet, a second inlet, and an outlet disposed on the side of the pump body. The valve assembly is used to switch the flow direction of the conveying pipeline, thereby achieving switching between different working stages of acid mixing and continuous operation of the alternating cycle acid mixing process.

[0007] Furthermore, the homogenizing pump includes a stator and a rotor disposed inside the pump body. The stator is fixedly installed inside the pump body, and the rotor is a rotating component disposed inside the stator. The stator and the rotor generate high-speed relative motion through a motor, and the second inlet is opened at the center of the stator.

[0008] Furthermore, the first inlet is connected to the first outlet of the first storage tank and the second outlet of the second storage tank via the delivery pipeline, the second inlet is connected to the first outlet of the first storage tank and the second outlet of the second storage tank, and the outlet is connected to the first return port of the first storage tank and the second return port of the second storage tank.

[0009] Furthermore, the valve assembly includes a first circulation valve, a first output valve, and a first filling valve disposed at the first outlet of the first storage tank; a first return valve disposed at the first return port of the first storage tank; a second circulation valve, a second output valve, and a second filling valve disposed at the second outlet of the second storage tank; and a second return valve disposed at the second return port of the second storage tank.

[0010] Furthermore, the first circulation valve is installed on the delivery pipeline between the first outlet of the first storage tank and the first inlet of the homogenizing pump, and is used to control the opening and closing of the delivery pipeline from the first outlet of the acid solution in the first storage tank 1 to the first inlet of the homogenizing pump.

[0011] The first output valve is installed on the delivery pipeline between the first outlet of the first storage tank and the input end of the delivery pump, and is used to control the flow of the finished acid solution in the first storage tank from the first outlet into the delivery pipeline of the delivery pump input end. The first filling valve is installed on the delivery pipeline between the first outlet of the first storage tank and the second inlet of the homogenizing pump, and is used to control the opening and closing of the delivery pipeline from the first outlet of the first storage tank to the negative pressure of the second inlet of the homogenizing pump for the acid solution in the first storage tank. The first return valve is installed on the delivery pipeline between the first return port of the first storage tank and the outlet of the homogenizing pump, and is used to control the flow of acid solution from the outlet of the homogenizing pump into the first return port of the first storage tank.

[0012] Furthermore, the second circulation valve is installed on the delivery pipeline between the second outlet of the second storage tank and the first inlet of the homogenizing pump, and is used to control the opening and closing of the delivery pipeline from the second outlet of the second storage tank to the first inlet of the homogenizing pump. The second output valve is installed on the delivery pipeline between the second outlet of the second storage tank and the input end of the delivery pump, and is used to control the flow of the finished acid solution in the second storage tank from the second outlet into the delivery pipeline at the input end of the delivery pump. The second filling valve is installed on the delivery pipeline between the second outlet of the second storage tank and the second inlet of the homogenizing pump, and is used to control the opening and closing of the delivery pipeline from the second outlet of the second storage tank to the negative pressure of the second inlet of the homogenizing pump for the acid solution in the second storage tank. The second return valve is installed on the delivery pipeline between the second return port of the second storage tank and the outlet of the homogenizing pump, and is used to control the flow of acid solution from the outlet of the homogenizing pump into the second return port of the second storage tank.

[0013] An alternating acid mixing method for a flow battery, applied to any of the above-described alternating acid mixing devices for flow batteries, the method comprising: S1, inject A acid solution into the first storage tank and B acid solution into the second storage tank. During the first preset time T1, the homogenizing pump drives the A acid solution in the first storage tank to circulate. S2, within the second preset time T2, the B acid solution in the second storage tank is drawn into the homogenizing pump and mixed with the A acid solution. The mixed acid solution is then returned to the first storage tank, thus achieving the initial mixing of the acid solution. S3, within the third preset time T3, the mixed solution in the first storage tank is mixed in a single cycle, and it is predicted whether the cumulative acid solution after mixing meets the production output. If it does not meet the output, proceed to step S4; if it does meet the output, proceed to step S10. S4, during the third preset time T3, while the mixed solution in the first storage tank is continuously mixed in a single cycle, A acid solution is injected into the second storage tank. S5, within the first preset time T1, the acid solution after mixing in the first storage tank is output to the finished product tank, and then B acid solution is added to the first storage tank, while the homogenizing pump drives the A acid solution in the second storage tank to circulate. S6, within the second preset time T2, the B acid solution in the first storage tank is drawn into the homogenizing pump and mixed with the A acid solution, and the mixed acid solution is returned to the second storage tank; S7. Within the third preset time T3, the mixed solution in the second storage tank is mixed in a single cycle, and it is predicted whether the cumulative acid solution after mixing meets the production output. If it does not meet the output, proceed to step S8; if it does meet the output, proceed to step S10. S8, During the third preset time T3, while the mixed solution in the second storage tank is continuously mixed in a single cycle, A acid solution is injected into the first storage tank. S9, within the first preset time T1, the acid solution after mixing in the second storage tank is output to the finished product tank, and then B acid solution is added to the second storage tank. At the same time, the homogenizing pump drives the A acid solution in the first storage tank to circulate. After the circulation is completed, return to step S2. S10, when the production forecast result in step S3 or step S7 is sufficient to meet the production output, after the mixed solution in the storage tank is mixed in a single cycle for a third preset time T3, the acid solution after mixing is transported to the finished product tank.

[0014] Furthermore, the step of determining whether the cumulative acid solution after mixing meets the production output includes: adding the volume of the acid solution after mixing in the first storage tank to the volume of the mixed acid solution already stored in the finished product tank to calculate the total cumulative mixed acid solution; comparing the total cumulative mixed acid solution with the production output threshold preset in the production process; if the total cumulative mixed acid solution does not reach the production output threshold, it is determined that the production output is not met, and the process proceeds to step S4 to continue alternating production; if the total cumulative mixed acid solution reaches the production output threshold, it is determined that the production output is met, and the process proceeds to step S10 to complete the final output of the finished acid solution.

[0015] Furthermore, the step of continuously mixing the mixed solution in the first storage tank in a single cycle while simultaneously injecting tretinoin solution into the second storage tank during the third preset time period T3 includes: continuously mixing the mixed solution in the first storage tank in a single cycle during the third preset time period T3; and injecting tretinoin solution into the second storage tank when the production forecast result is determined to be insufficient; utilizing the homogenization time of the mixed acid solution in the first storage tank to complete the injection of tretinoin solution into the second storage tank.

[0016] An alternating acid mixing system for a flow battery, applied to any of the above-described alternating acid mixing methods for flow batteries, the system comprising: The first pre-circulation module is used to inject A acid solution into the first storage tank and B acid solution into the second storage tank. During the first preset time T1, the homogenizing pump drives the A acid solution in the first storage tank to circulate. The first acid mixing module is used to draw the B acid solution in the second storage tank into the homogenizing pump and mix it with the A acid solution within the second preset time T2. The mixed acid solution is then returned to the first storage tank to achieve the initial mixing of the acid solution. The first mixing judgment module is used to perform single-cycle mixing of the mixed solution in the first storage tank within the third preset time T3, and to predict whether the cumulative acid solution after mixing meets the production output. If it does not meet the output, it enters the mixing and acid injection module; if it does meet the output, it enters the acid mixing completion output module. In the first mixing and acid injection module, during the third preset time T3, the mixing solution in the first storage tank is continuously mixed in a single cycle while A acid solution is injected into the second storage tank. The first output and pre-circulation module is used to output the acid solution after mixing in the first storage tank to the finished product tank within the first preset time T1, and then add B acid solution to the first storage tank, while the homogenizing pump drives the A acid solution in the second storage tank to circulate. The second acid mixing module is used to draw the B acid solution in the first storage tank into the homogenizing pump and mix it with the A acid solution within the second preset time T2, and the mixed acid solution is returned to the second storage tank. The second mixing judgment module is used to perform single-cycle mixing of the mixed solution in the second storage tank within the third preset time T3, and to predict whether the cumulative acid solution after mixing meets the production output. If it does not meet the output, it enters the second mixing and acid injection module; if it meets the output, it enters the acid mixing completion output module. The second mixing and acid injection module is used to inject A acid solution into the first storage tank while the mixing solution in the second storage tank is continuously mixed in a single cycle within a third preset time T3. The second output and pre-circulation module is used to output the acid solution after mixing in the second storage tank to the finished product tank within the first preset time T1. Then, B acid solution is added to the second storage tank, while the homogenizing pump drives the A acid solution in the first storage tank to circulate. After the circulation is completed, it returns to the first mixed acid module. The mixed acid output module is used to transport the mixed acid solution to the finished product tank after a third preset time T3 of single-cycle mixing of the mixed solution in the storage tank when the production forecast result is sufficient to meet the production output.

[0017] The beneficial effects of this invention are as follows: The alternating circulation acid mixing device of the flow battery of this invention, through the alternating circulation of the first and second storage tanks, utilizes the negative pressure generated by the high-speed rotation of the homogenizing pump rotor to achieve the self-absorption of the acid solution, thereby completing the online shear mixing of the two acid solutions, which significantly simplifies the device structure; at the same time, by controlling the valve assembly, the first and second storage tanks are cyclically switched as mixing tanks and replenishment tanks, so that the mixing, output and circulation processes are connected in parallel, greatly improving the continuity of production and equipment utilization, thereby realizing the efficient, continuous and safe production of mixed acid solution. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a schematic diagram of the alternating cycle mixed acid device for a flow battery according to the first embodiment of the present invention. Figure 2 This is a flowchart of an alternating cycle mixed acid method for a flow battery according to a second embodiment of the present invention; Figure 3 This is a schematic diagram of the alternating cycle mixed acid system of a flow battery according to the third embodiment of the present invention; Figure 4 This is a schematic diagram of the network-side server provided according to the fourth embodiment of the present invention.

[0020] The component names and their numbers in the diagram are as follows: Alternating cycle mixed acid device 100 for flow batteries; First storage tank 1, first filling port 11, first liquid outlet 12, first liquid return port 13; Second storage tank 2, second filling port 21, second liquid outlet 22, second liquid return port 23; Finished product tank 3, infusion port 31; 4. Delivery pipeline; 5. Injection pump; Homogenizer 6, stator 61, rotor 62, first inlet 63, second inlet 64, outlet 65, transfer pump 7; Valve assembly 8, first circulation valve 81, first output valve 82, first filling valve 83, first return valve 84, second circulation valve 85, second output valve 86, second filling valve 87, second return valve 88. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] like Figure 1 As shown, the first embodiment of the present invention relates to an alternating cycle acid mixing device 100 for a flow battery, including a first storage tank 1, a second storage tank 2, a finished product tank 3, a conveying pipeline 4 communicating with the first storage tank 1, the second storage tank 2, and the finished product tank 3, a filling pump 5, a homogenizing pump 6, a conveying pump 7, and a valve assembly 8 disposed on the conveying pipeline 4. The first storage tank 1 serves as a mixing or replenishment tank during the alternating cycle, and participates in acid circulation or supplies acid as needed. The second storage tank 2 cooperates with the first storage tank 1, serving as a mixing or replenishment tank during the alternating cycle, and participates in acid circulation or supplies acid as needed. The finished product tank 3 receives and stores the mixed finished acid solution. The conveying pipeline 4 connects the first storage tank 1, the second storage tank 2, and the finished product tank 3. The filling pump 5, the homogenizing pump 6, the conveying pump 7, and the valve assembly 8 allow the acid solution to flow within the conveying pipeline, realizing the mixing, circulation, and output of the acid solution. The filling pump 5 is used to deliver the acid solution to be mixed into the first storage tank 1 or the second storage tank 2 through the delivery pipeline 4. The homogenizing pump 6 is used to generate negative pressure to draw in the acid solution, achieving uniform mixing of the two acid solutions. The delivery pump 7 is used to output the uniformly mixed acid solution to the finished product tank 3. The valve assembly 8 is used to switch the flow direction of the delivery pipeline 4, realizing the switching of different working stages of acid mixing and the continuous operation of the alternating cycle acid mixing process.

[0023] In some embodiments, the first storage tank 1 includes a first filling port 11 at the top of the first storage tank 1, a first outlet 12 at the bottom of the first storage tank 1, and a first return port 13 at the top of the first storage tank 1. The first filling port 11 is connected to the outlet of a filling pump 5 via a delivery pipeline 4, and is used to input the A acid solution or B acid solution to be mixed into the first storage tank 1 via the filling pump 5. The first outlet 12 is connected to a homogenizing pump 6 and a delivery pump 7 via delivery pipelines 4, respectively. During the acid solution mixing stage, the acid solution is output to the homogenizing pump 6 through the first outlet 12 for circulation mixing; after the acid solution mixing is completed, the uniformly mixed acid solution is output to the delivery pump 7 through the first outlet 12 and then enters the finished product tank 3. The first return port 13 is connected to the homogenizing pump 6 via a delivery pipeline 4, and is used to return the acid solution mixed by the homogenizing pump 6 to the first storage tank 1, forming a circulation loop.

[0024] As an example, when the first storage tank 1 is used as a mixing tank, the operation of the first storage tank 1 is as follows: A acid solution is added to the first storage tank 1 through the first filling port 11 via the filling pump 5. The A acid solution output from the first outlet 12 of the first storage tank 1 is circulated through the homogenizing pump 6 and uniformly mixed with the B acid solution. At the same time, the acid solution mixed by the homogenizing pump 6 is returned to the first storage tank 1 through the first return port 13 for circulation. After mixing, the finished acid solution is input into the finished product tank 3 through the transfer pump 7. When the first storage tank 1 is used as a replenishment tank, the operation of the first storage tank 1 is as follows: B acid solution is added to the first storage tank 1 through the first filling port 11 via the filling pump 5, and B acid solution is delivered to the homogenizing pump 6 through the first outlet 12 during the mixing stage.

[0025] In some embodiments, the second storage tank 2 includes a second filling port 21 at the top of the second storage tank 2, a second outlet 22 at the bottom of the second storage tank 2, and a second return port 23 at the top of the second storage tank 2. The second filling port 21 is connected to the outlet of the filling pump 5 via a delivery pipeline 4, and is used to input the A acid solution or B acid solution to be mixed into the second storage tank 2 via the filling pump 5. The second outlet 22 is connected to the homogenizing pump 6 and the delivery pump 7 via the delivery pipeline 4, respectively. During the acid solution mixing stage, the acid solution is output to the homogenizing pump 6 through the second outlet 22 for circulation mixing; after the acid solution mixing is completed, the uniformly mixed acid solution is output to the delivery pump 7 through the second outlet 22 and then enters the finished product tank 3. The second return port 23 is connected to the homogenizing pump 6 via the delivery pipeline 4, and is used to return the acid solution mixed by the homogenizing pump 6 to the second storage tank 2, forming a circulation loop.

[0026] As an example, when the second storage tank 2 is used as a mixing tank, its operation involves adding A acid solution to the tank via the filling pump 5 through the second filling port 21. The A acid solution output from the second outlet 22 of the second storage tank 2 is circulated by the homogenizing pump 6 and uniformly mixed with B acid solution. Simultaneously, the acid solution mixed by the homogenizing pump 6 is returned to the second storage tank 2 through the second return port 23 for circulation. The finished acid solution after mixing is input into the finished product tank 3 via the transfer pump 7. When the second storage tank 2 is used as a replenishment tank, its operation involves adding B acid solution via the filling pump 5 through the second filling port 21, and during the mixing stage, supplying B acid solution to the homogenizing pump 6 through the second outlet 22.

[0027] In some embodiments, the finished product tank 3 includes an inlet 31. The inlet 31 is connected to the output end of the transfer pump 7 via a transfer pipeline 4. The inlet of the transfer pump 7 is connected to the first outlet 12 of the first storage tank 1 and the second outlet 22 of the second storage tank 2 via the transfer pipeline 4. The finished product tank 3 is used to store the finished acid solution. The finished acid solution, after mixing in the first storage tank 1 or the second storage tank 2, is input into the finished product tank 3 via the inlet 31 through the transfer pump 7.

[0028] As an example, when the first storage tank 1 is used as a mixing tank, the finished acid solution after mixing in the first storage tank 1 is input into the finished product tank 3 through the transfer pump 7. When the second storage tank 2 is used as a mixing tank, the finished acid solution after mixing in the second storage tank 2 is input into the finished product tank 3 through the transfer pump 7.

[0029] In some embodiments, the output end of the filling pump 5 is connected to the first filling port 11 of the first storage tank 1 and the second filling port 21 of the second storage tank 2 via the delivery pipeline 4. The filling pump 5 is used to add the A acid solution or B acid solution to be mixed into the first storage tank 1 and the second storage tank 2.

[0030] As an example, when the first storage tank 1 is used as a mixing tank and the second storage tank 2 is used as a replenishment tank, the A acid solution to be mixed is added to the first storage tank 1 through the first filling port 11 by the filling pump 5, and the B acid solution to be mixed is added to the second storage tank 2 through the second filling port 21 by the filling pump 5. When the first storage tank 1 is used as a replenishment tank and the second storage tank 2 is used as a mixing tank, the B acid solution to be mixed is added to the first storage tank 1 through the first filling port 11 by the filling pump 5, and the A acid solution to be mixed is added to the second storage tank 2 through the second filling port 21 by the filling pump 5.

[0031] In some embodiments, the homogenizing pump 6 includes a stator 61 and a rotor 62 disposed inside the pump body. The stator 61 is fixedly installed inside the pump body, and the rotor 62, as a rotating component, is disposed inside the stator 61. The stator 61 and rotor 62 generate high-speed relative motion via a motor, thereby mixing the two acid solutions in the homogenizing pump 6. The high-speed rotation of the rotor 62 generates a negative pressure in the central region of the stator 61, facilitating the intake of the acid solution to be mixed. The homogenizing pump 6 includes a first inlet 63 disposed on the side of the pump body, a second inlet 64 opened at the center of the stator 61, and an outlet 65 disposed on the side of the pump body. The first inlet 63 is connected to the first outlet 12 of the first storage tank 1 and the second outlet 22 of the second storage tank 2 via a delivery pipeline 4, for inputting the solution to be mixed into the homogenizing pump 6 through the first storage tank 1 or the second storage tank 2. The second inlet 63 is connected to the first outlet 12 of the first storage tank 1 and the second outlet 22 of the second storage tank 2, for inputting the Brønsted acid solution to be mixed into the homogenizing pump 6 through the first storage tank 1 or the second storage tank 2. The outlet 65 is connected to the first return port 13 of the first storage tank 1 and the second return port 23 of the second storage tank 2, respectively, to return the acid solution mixed by the homogenizing pump 6 to the first storage tank 1 or the second storage tank 2 to form a circulation loop.

[0032] As an example, when the first storage tank 1 is used as a mixing tank and the second storage tank 2 is used as a replenishment tank, the first storage tank 1 is filled with A acid solution and the second storage tank 2 is filled with B acid solution. The first inlet 63 of the homogenizing pump 6 is connected to the first outlet 12 of the first storage tank 1, the second inlet 64 of the homogenizing pump 6 is connected to the second outlet 22 of the second storage tank 2, and the outlet 65 of the homogenizing pump 6 is connected to the first return outlet 13 of the first storage tank 1. The A acid solution in the first storage tank 1 is circulated through the homogenizing pump 6, and the B acid solution in the second storage tank 2 is drawn into the homogenizing pump 6 under negative pressure to mix with the A acid solution and then circulate within the first storage tank 1. When the first storage tank 1 is used as a replenishment tank and the second storage tank 2 is used as a mixing tank, the first storage tank 1 is filled with Brønsted acid solution and the second storage tank 2 is filled with Acrylic acid solution. The first inlet 63 of the homogenizing pump 6 is connected to the second outlet 22 of the second storage tank 2, the second inlet 64 of the homogenizing pump 6 is connected to the first outlet 12 of the first storage tank 2, and the outlet 65 of the homogenizing pump 6 is connected to the second return outlet 23 of the second storage tank 2. The Acrylic acid solution in the second storage tank 2 is circulated through the homogenizing pump 6, and the Brønsted acid solution in the first storage tank 1 is drawn into the homogenizing pump 6 under negative pressure to mix with the Acrylic acid solution and then circulates in the second storage tank 2.

[0033] In some embodiments, the valve assembly 8 includes a first circulation valve 81, a first output valve 82, and a first filling valve 83 disposed at the first outlet 12 of the first storage tank 1; a first return valve 84 disposed at the first return port 13 of the first storage tank 1; a second circulation valve 85, a second output valve 86, and a second filling valve 87 disposed at the second outlet 22 of the second storage tank 2; and a second return valve 88 disposed at the second return port 23 of the second storage tank 2. The first circulation valve 81 is disposed on the delivery pipeline 4 between the first outlet 12 of the first storage tank 1 and the first inlet 63 of the homogenizing pump 6, and is used to control the flow of acid solution from the first outlet 12 into the delivery pipeline 4 of the first inlet 63 of the homogenizing pump 6, thereby opening and closing the circulation path of acid solution from the first storage tank 1 into the homogenizing pump 6. The first output valve 82 is installed on the conveying pipeline 4 between the first outlet 12 of the first storage tank 1 and the input end of the conveying pump 7. It is used to control the flow of the finished acid solution in the first storage tank 1 from the first outlet 12 into the input end of the conveying pump 7. When it is open, it opens the finished product output passage of the first storage tank 1, and works with the conveying pump 7 to pump the finished acid solution to the finished product tank 3. The first filling valve 83 is installed on the conveying pipeline 4 between the first outlet 12 of the first storage tank 1 and the second inlet 64 of the homogenizing pump 6. It is used to control the flow of the acid solution in the first storage tank 1 from the first outlet 12 into the pipeline through the negative pressure suction of the second inlet 64 of the homogenizing pump 6. When the first storage tank 1 is used as a supply tank, the first filling valve 83 is opened to open the negative pressure suction passage of the B acid solution, so that the B acid solution is sucked into the homogenizing pump 6 and mixed with the A acid solution. The first return valve 84 is installed on the conveying pipeline 4 between the first return port 13 of the first storage tank 1 and the outlet 65 of the homogenizing pump 6. It is used to control the flow of acid solution from the outlet 65 of the homogenizing pump 6 into the first return port 13 of the first storage tank 1. When open, it opens the acid solution return path, forming a circulation between the first storage tank 1 and the homogenizing pump 6. The second circulation valve 85 is installed on the conveying pipeline 4 between the second outlet 22 of the second storage tank 2 and the first inlet 63 of the homogenizing pump 6. It is used to control the flow of acid solution from the second outlet 22 of the second storage tank 2 into the first inlet 63 of the homogenizing pump 6, thus opening and closing the circulation path of acid solution in the second storage tank 2 into the homogenizing pump 6. The second output valve 86 is installed on the conveying pipeline 4 between the second outlet 22 of the second storage tank 2 and the input end of the conveying pump 7. It is used to control the flow of the finished acid solution in the second storage tank 2 from the second outlet 22 into the input end of the conveying pump 7. When it is turned on, it opens the finished product output passage of the second storage tank 2 and works with the conveying pump 7 to pump the finished acid solution to the finished product tank 3.The second filling valve 87 is installed on the conveying pipeline 4 between the second outlet 22 of the second storage tank 2 and the second inlet 64 of the homogenizing pump 6. It is used to control the opening and closing of the pipeline through which the acid solution in the second storage tank 2 is drawn in by the second outlet 22 and the second inlet 64 of the homogenizing pump 6 under negative pressure. When the second storage tank 2 is used as a supply tank, the second filling valve 87 is opened to open the negative pressure suction passage of the B acid solution, so that the B acid solution is drawn into the homogenizing pump 6 and mixed with the A acid solution. The second return valve 88 is installed on the conveying pipeline 4 between the second return port 23 of the second storage tank 2 and the outlet 65 of the homogenizing pump 6. It is used to control the opening and closing of the pipeline through which the acid solution from the outlet 65 of the homogenizing pump 6 flows into the second return port 23 of the second storage tank 2. When opened, it opens the acid solution return passage, forming a circulation between the second storage tank 2 and the homogenizing pump 6.

[0034] In some embodiments, the valve assembly 8 further includes a controller (not shown) that is electrically connected to each valve in the valve assembly 8 and is used to control the opening and closing of each valve.

[0035] The present invention discloses an alternating cycle acid mixing device 100 for a flow battery. Through the alternating operation of a first storage tank 1 and a second storage tank 2, continuous mixing and output of two acid solutions are achieved. The specific working process is as follows: First, when the first storage tank 1 acts as the mixing tank and the second storage tank 2 acts as the replenishment tank, the filling pump 5 injects acid A solution into the first storage tank 1 through the first filling port 11 and acid B solution into the second storage tank 2 through the second filling port 21. The controller opens the first circulation valve 81 and the first return valve 84, and closes the other valves. The homogenizing pump 6 is started, and the acid A solution in the first storage tank 1 flows out from the first outlet 12, enters the first inlet 63 of the homogenizing pump 6 through the first circulation valve 81, is processed by the homogenizing pump 6, flows out from the outlet 65, and then flows through the first return valve. Valve 84 returns from the first return port 13 to the first storage tank 1, forming a single-loop circuit, which continues for a first preset time T1, allowing the A acid solution to reach a stable state within the system. Then, while keeping the first loop valve 81 and the first return valve 84 open, the controller opens the second filling valve 87. The rotor 62 of the homogenizing pump 6 rotates at high speed, generating negative pressure at the second inlet 64, automatically drawing the B acid solution from the second storage tank 2 into the homogenizing pump 6 via the second filling valve 87. The A acid solution and the B acid solution undergo high-shear mixing between the stator 61 and the rotor 62. The mixed acid solution returns to the first storage tank 1 via the outlet 65 and the first return valve 84, continuing for a second preset time T2, achieving initial mixing of the two acids. Then, the second filling valve 87 is closed, maintaining the first... The circulation valve 81 and the first return valve 84 are opened, allowing the mixed acid solution in the first storage tank 1 to continue single-circulation homogenization between the homogenizing pump 6 and the first storage tank 1 for a third preset time T3, so that the mixed acid solution achieves microscopic homogenization. After the mixed acid solution in the first storage tank 1 is homogenized, the controller closes the first circulation valve 81 and the first return valve 84, opens the first output valve 82, and starts the delivery pump 7 to pump the finished acid solution in the first storage tank 1 to the delivery port 31 of the finished product tank 3 through the first outlet 12 and the delivery pump 7, completing the finished product output. After the output of the first storage tank 1 is completed, the first output valve 82 is closed, and the filling pump 5 injects B acid solution into the first storage tank 1. The first storage tank 1 is a replenishment tank, and the second storage tank 2 is a mixing tank. The second circulation is started. Valve 85 and the second return valve 88 are used to start the homogenizing pump 6, which performs single-cycle pre-homogenization of the A acid solution in the second storage tank 2 for a first preset time T1. The second circulation valve 85 and the second return valve 88 are kept open, and the first filling valve 83 is opened at the same time. The homogenizing pump 6 generates negative pressure, which draws the B acid solution in the first storage tank 1 into the homogenizing pump 6, and mixes it with the A acid solution output from the second storage tank 2 under high shear. The mixed acid solution is returned to the second storage tank 2 through the outlet 65 and the second return valve 88 for a second preset time T2. The first filling valve 83 is closed, and the second circulation valve 85 and the second return valve 88 are kept open, so that the mixed acid solution in the second storage tank 2 is homogenized in a single cycle between the homogenizing pump 6 and the second storage tank 2 for a third preset time T3.After homogenization of the mixed acid solution in the second storage tank 2, it is pumped to the finished product tank 3 via the transfer pump 7. Subsequently, the second storage tank 2 becomes a replenishment tank and is injected with acid B solution, while the first storage tank 1 returns to its role as a mixing tank and is injected with acid A solution, repeating the above mixing cycle. The device uses valve assembly 8 to switch between the first storage tank 1 and the second storage tank 2, allowing them to alternately perform the roles of mixing tank and replenishment tank, achieving parallel connection of mixing, output, and injection processes, thus completing the continuous alternating cycle of mixed acid production. When the total amount of mixed acid solution reaches the preset production output, the final finished product is output.

[0036] The first embodiment of the present invention relates to an alternating cycle acid mixing device for a flow battery. By alternating the circulation of a first storage tank 1 and a second storage tank 2, the negative pressure generated by the high-speed rotation of the rotor 62 of the homogenizing pump 6 enables the self-absorption of the acid solution, thus completing the online mixing of the two acid solutions, which significantly simplifies the device structure. At the same time, the first storage tank 1 and the second storage tank 2 are switched cyclically as mixing tanks and replenishment tanks by the control valve assembly 8, so that the mixing, output and circulation processes are connected in parallel, which greatly improves the continuity of production and equipment utilization, thereby realizing the production of mixed acid solution in a high-efficiency, continuous and safe manner.

[0037] The second embodiment of the present invention relates to an alternating cycle acid mixing method for a flow battery. In this embodiment, continuous acid mixing is achieved by alternating the operation of a first storage tank and a second storage tank: firstly, an A acid solution is injected into the first storage tank, and an B acid solution is injected into the second storage tank. After the A acid solution in the first storage tank is pre-homogenized by circulation by a homogenizing pump, the B acid solution is drawn in for preliminary mixing. The mixture is then returned to the first storage tank for single-cycle homogenization, and the production rate is pre-judged. If the production rate is not met, the A acid solution is injected into the second storage tank while the mixture is being homogenized in a single cycle. Subsequently, the finished product from the first storage tank is output to the finished product tank and... Acid B solution is added to the first tank, while the homogenizing pump drives the acid A solution in the second tank to circulate and pre-homogenize. Then, the acid B solution in the first tank is drawn into the homogenizing pump and mixed with the acid A solution in the second tank. The mixture is returned to the second tank for single-cycle homogenization, and the output is predicted again. If the output still does not meet the target, acid A solution is injected into the first tank while the mixture is being homogenized in a single-cycle manner. Then, the finished product from the second tank is output to the finished product tank, and acid B solution is added to it. At the same time, the homogenizing pump drives the acid A solution in the first tank to circulate and pre-homogenize. The above operation is repeated until the predicted output meets the target, and then the final mixture is delivered to the finished product tank. This invention utilizes two storage tanks that alternately perform the roles of mixing and replenishment, enabling parallel and seamless processes such as mixing, output, and liquid injection to achieve continuous production and significantly improve equipment utilization and production efficiency. Simultaneously, it employs a homogenizing pump for high-shear online mixing combined with single-cycle homogenization to ensure uniform acid mixing and stable finished product quality. Furthermore, it achieves flexible production control by real-time prediction of cumulative output during production, avoiding over- or under-production. Moreover, it eliminates the need for a complex proportioning system, simplifying the process structure and reducing equipment investment and operating costs.

[0038] The following details the implementation of the alternating acid mixing method for the flow battery in this embodiment. The following details are provided for ease of understanding and are not essential for implementing this solution. The specific process of this embodiment is as follows: Figure 2 As shown, this embodiment is applied to an alternating cycle mixed acid device for flow batteries.

[0039] Step S1: Inject A acid solution into the first storage tank and B acid solution into the second storage tank. During the first preset time T1, the homogenizing pump drives the A acid solution in the first storage tank to circulate.

[0040] Specifically, after the alternating cycle mixing method of the flow battery begins, the A acid solution to be mixed is first injected into the first storage tank 1 through the first injection port 11 via the injection pump 5, and the B acid solution to be mixed is injected into the second storage tank 2 through the second injection port 21 via the injection pump 5.

[0041] Subsequently, the controller controls valve assembly 8 to open the first circulation valve 81 and the first return valve 84, and close the first output valve 82, the first filling valve 83, the second circulation valve 85, the second output valve 86, the second filling valve 87, and the second return valve 88, forming an independent circulation loop between the first storage tank 1 and the homogenizing pump 6. The homogenizing pump 6 is started, causing the A acid solution in the first storage tank 1 to flow out from the first outlet 12, enter the first inlet 63 of the homogenizing pump 6 through the first circulation valve 81, flow out from the outlet 65 after passing through the homogenizing pump 6, and then flow back into the first storage tank 1 from the first return port 13 through the first return valve 84, forming a single circulation loop between the first storage tank 1 and the homogenizing pump 6.

[0042] The above cycle continues for a first preset time T1, where T1 is a preset value. Relevant technical personnel can adjust the specific value according to the mixing process requirements.

[0043] As an example, the first preset time T1 can be set to 10 minutes to allow the A acid solution in the first storage tank 1 to reach a stable flow state and complete the pre-homogenization treatment.

[0044] In step S2, within the second preset time T2, the B acid solution in the second storage tank is drawn into the homogenizing pump and mixed with the A acid solution. The mixed acid solution is then returned to the first storage tank, thus achieving the initial mixing of the acid solution.

[0045] Specifically, when the circulation time of the A acid solution in the first storage tank 1 in step S1 meets the first preset time T1, the first circulation valve 81 and the first return valve 84 are kept open, and the second filling valve 87 is opened at the same time, so that the second outlet 22 of the second storage tank 2 is connected to the second inlet 64 of the homogenizing pump 6.

[0046] The rotor 62 of the homogenizing pump 6 rotates at high speed, generating a negative pressure at the second inlet 64 in the central region of the stator 61, which automatically draws the B acid solution in the second storage tank 2 into the second filling valve 87. The A acid solution and the B acid solution are mixed under high shear between the stator 61 and the rotor 62 of the homogenizing pump 6. The mixed acid solution is returned to the first storage tank 1 through the outlet 65 and the first return valve 84.

[0047] The above mixing process lasts for a second preset time T2, where T2 is a preset value. Relevant technical personnel can adjust the specific value according to the mixed acid ratio and mixing uniformity requirements.

[0048] As an example, the second preset duration T2 can be set to 20 minutes, thereby achieving the initial uniform mixing of acid A solution and acid B solution, and thus achieving the initial mixing of acid A solution and acid B solution into the first storage tank 1.

[0049] Step S3: Within the third preset time T3, the mixed solution in the first storage tank is mixed in a single cycle, and it is predicted whether the cumulative acid solution after mixing meets the production output. If it does not meet the output, proceed to step S4; if it does meet the output, proceed to step S10.

[0050] Specifically, the second filling valve 87 is closed, while the first circulation valve 81 and the first return valve 84 remain open, allowing the mixed acid solution in the first storage tank 1 to continue circulating and homogenizing in the single circulation loop between the first storage tank 1 and the homogenizing pump 6. The homogenizing pump 6 continuously performs high shear treatment on the mixed acid solution to achieve microscopic homogenization of the acid solution.

[0051] The above homogenization process lasts for a third preset time T3, where T3 is a preset value. Technical personnel can adjust the specific value according to the required level of mixing uniformity.

[0052] As an example, the third preset duration T3 can be set to 20 minutes.

[0053] The process of determining whether the cumulative acid solution after mixing meets the production output includes: adding the volume of the acid solution after mixing in the first storage tank 1 to the volume of the mixed acid solution already stored in the finished product tank 3 to calculate the total cumulative mixed acid solution; comparing the total cumulative mixed acid solution with the preset production output threshold of the production process; if the total cumulative mixed acid solution does not reach the production output threshold, it is determined that the production output is not met, and the process proceeds to step S4 to continue alternating production; if the total cumulative mixed acid solution reaches the production output threshold, it is determined that the production output is met, and the process proceeds to step S10 to complete the final output of the finished acid solution, thereby achieving precise control of the production progress and ensuring the microscopic uniformity of the mixed solution while meeting the output target.

[0054] In step S4, during the third preset time T3, while the mixed solution in the first storage tank is continuously mixed in a single cycle, A acid solution is injected into the second storage tank.

[0055] Specifically, when the production forecast result in step S3 is insufficient to meet production targets, the first circulation valve 81 and the first return valve 84 remain open, and the homogenizing pump 6 continues to drive the mixed acid solution in the first storage tank 1 for circulation and homogenization, without interruption of the homogenization process for the third preset time T3. Simultaneously, the injection pump 5 is started to add A acid solution to the second storage tank 2. This achieves parallel operation of the circulation mixing in the first storage tank 1 and the injection into the second storage tank 2, making full use of equipment downtime and improving production efficiency.

[0056] In other words, within the third preset time period T3, the mixed solution in the first storage tank 1 is continuously mixed in a single cycle. At the same time, when the predicted output is not sufficient, A acid solution is injected into the second storage tank 2. The A acid solution is added to the second storage tank 2 by utilizing the circulation homogenization time of the mixed acid solution in the first storage tank 1. This makes full use of the equipment's waiting time, avoids downtime for a single process, and significantly improves the equipment utilization rate and production efficiency of the entire acid mixing unit.

[0057] Step S5: Within the first preset time T1, the acid solution after mixing in the first storage tank is output to the finished product tank. Then, B acid solution is added to the first storage tank, while the homogenizing pump drives the A acid solution in the second storage tank to circulate.

[0058] Specifically, within the first preset time period T1, the first circulation valve 81 and the first return valve 84 are closed, the first output valve 82 is opened, and the delivery pump 7 is started to pump the finished acid solution after mixing in the first storage tank 1 to the delivery port 31 of the finished product tank 3 through the first outlet 12 and the delivery pump 7, thus completing the finished product output of the mixed acid solution; after the finished acid solution in the first storage tank 1 is output, the first output valve 82 is closed, and the injection pump 5 is started to inject B acid solution into the first storage tank 1.

[0059] At the same time, within the first preset time period T1, the controller controls the valve assembly 8 to open the second circulation valve 85 and the second return valve 88, close other related valves, and start the homogenizing pump 6. This causes the newly injected A acid solution in the second storage tank 2 to flow out from the second outlet 22, enter the first inlet 63 of the homogenizing pump 6 through the second circulation valve 85, flow out from the outlet 65 after passing through the homogenizing pump 6, and then flow back into the second storage tank 2 from the second return port 23 through the second return valve 88, forming a single circulation loop between the second storage tank 2 and the homogenizing pump 6 for premixing.

[0060] The above cycle continues for a first preset time T1, where T1 is a preset value. Relevant technical personnel can adjust the specific value according to the mixing process requirements.

[0061] As an example, the first preset time T1 can be set to 10 minutes to allow the A acid solution in the second storage tank 2 to reach a stable flow state and complete the pre-homogenization treatment.

[0062] In step S6, within the second preset time period T2, the B acid solution in the first storage tank is drawn into the homogenizing pump and mixed with the A acid solution. The mixed acid solution is then returned to the second storage tank.

[0063] Specifically, when the circulation time of the A acid solution in the second storage tank in step S5 meets the first preset time T1, the second circulation valve 85 and the second return valve 88 are kept open, and the first filling valve 83 is opened at the same time, so that the bottom outlet of the first storage tank 1 is connected to the second inlet 64 of the homogenizing pump 6.

[0064] The rotor 62 of the homogenizing pump 6 rotates at high speed, generating a negative pressure at the second inlet 64 in the central region of the stator 61, which automatically draws the B acid solution from the first storage tank 1 into the first filling valve 83. The A acid solution and the B acid solution in the first storage tank 1 are mixed under high shear between the stator 61 and the rotor 62 of the homogenizing pump 6, and the mixed acid solution is returned to the second storage tank 2 through the outlet 65 and the second return valve 88.

[0065] The above mixing process lasts for a second preset time T2, where T2 is a preset value. Relevant technical personnel can adjust the specific value according to the mixed acid ratio and mixing uniformity requirements.

[0066] As an example, the second preset duration T2 can be set to 20 minutes, thereby achieving the initial uniform mixing of acid A solution and acid B solution, and thus achieving the initial mixing of acid A solution and acid B solution into the second storage tank 2.

[0067] Step S7: Within the third preset time T3, the mixed solution in the second storage tank is mixed in a single cycle, and it is predicted whether the cumulative acid solution after mixing meets the production output. If it does not meet the output, proceed to step S8; if it does meet the output, proceed to step S10.

[0068] Specifically, the first filling valve 83 is closed, while the second circulation valve 85 and the second return valve 88 remain open, allowing the mixed acid solution in the second storage tank 2 to continue single-cycle homogenization between the homogenizing pump 6 and the second storage tank 2. The circulation time is a third preset duration T3, further homogenizing the mixed acid solution at a microscopic level.

[0069] The above homogenization process lasts for a third preset time T3, where T3 is a preset value. Technical personnel can adjust the specific value according to the required level of mixing uniformity.

[0070] As an example, the third preset duration T3 can be set to 20 minutes.

[0071] The process of determining whether the cumulative acid solution after mixing meets the production output includes: adding the volume of the acid solution after mixing in the second storage tank 2 to the volume of the mixed acid solution already stored in the finished product tank 2 to calculate the total cumulative mixed acid solution; comparing the total cumulative mixed acid solution with the preset production output threshold of the production process; if the total cumulative mixed acid solution does not reach the production output threshold, it is determined that the production output is not met, and the process proceeds to step S4 to continue alternating production; if the total cumulative mixed acid solution reaches the production output threshold, it is determined that the production output is met, and the process proceeds to step S10 to complete the final output of the finished acid solution, thereby achieving precise control of the production progress and ensuring the microscopic uniformity of the mixed solution while meeting the output target.

[0072] In step S8, during the third preset time period T3, while the mixed solution in the second storage tank is continuously mixed in a single cycle, A acid solution is injected into the first storage tank.

[0073] Specifically, when the production forecast result in step S7 is insufficient to meet production targets, the second circulation valve 85 and the second return valve 88 remain open, and the homogenizing pump 6 continues to drive the mixed acid solution in the second storage tank 2 for circulation and homogenization, without interruption of the homogenization process for the third preset time T3. Simultaneously, the injection pump 5 is started to add A acid solution to the first storage tank 1. This achieves parallel operation of the circulation mixing in the second storage tank 2 and the injection into the first storage tank 1, making full use of equipment downtime and improving production efficiency.

[0074] In other words, within the third preset time period T3, the mixed solution in the second storage tank 2 is continuously mixed in a single cycle. At the same time, when the predicted output is determined to be insufficient, A acid solution is injected into the first storage tank 1. The A acid solution is added to the first storage tank 1 by utilizing the circulation and homogenization time of the mixed acid solution in the second storage tank 2. This makes full use of the equipment's waiting time, avoids downtime for a single process, and significantly improves the equipment utilization rate and production efficiency of the entire acid mixing unit.

[0075] Step S9: Within the first preset time T1, the acid solution after mixing in the second storage tank is output to the finished product tank. Then, B acid solution is added to the second storage tank, while the homogenizing pump drives the A acid solution in the first storage tank to circulate. After the circulation is completed, return to step S2.

[0076] Specifically, within the first preset time period T1, the second circulation valve 85 and the second return valve 88 are closed, the second output valve 86 is opened, and the delivery pump 7 is started to pump the finished acid solution after mixing in the second storage tank 2 to the delivery port 31 of the finished product tank 3 through the second outlet 23 and the delivery pump 7, thus completing the finished product output of the mixed acid solution; after the finished acid solution in the second storage tank 2 is output, the second output valve 86 is closed, and the injection pump 5 is started to inject B acid solution into the second storage tank 2.

[0077] At the same time, within the first preset time period T1, the controller controls the valve assembly 8 to open the first circulation valve 81 and the first return valve 84, close other related valves, and start the homogenizing pump 6, so that the newly injected A acid solution in the first storage tank 1 flows out from the first outlet 12, enters the first inlet 63 of the homogenizing pump 6 through the first circulation valve 81, flows out from the outlet 65 after passing through the homogenizing pump 6, and then flows back into the first storage tank 1 from the first return port 13 through the first return valve 84, forming a single circulation loop between the first storage tank 1 and the homogenizing pump 6 for premixing.

[0078] The above cycle continues for a first preset time T1, where T1 is a preset value. Relevant technical personnel can adjust the specific value according to the mixing process requirements.

[0079] As an example, the first preset time T1 can be set to 10 minutes to allow the A acid solution in the second storage tank 2 to reach a stable flow state and complete the pre-homogenization treatment.

[0080] After completing the first preset time T1, return to step S2 to realize the continuous cycle operation of mixed acid solution production.

[0081] Step S10: When the production forecast result in step S3 or step S7 is sufficient to meet the production output, after the mixed solution in the storage tank is mixed in a single cycle for a third preset time T3, the acid solution after mixing is transported to the finished product tank.

[0082] Specifically, when the predicted output of mixing in the first storage tank 1 in step S3 or mixing in the second storage tank in step S7 is sufficient to meet the production output, the controller keeps the single-loop circuit between the storage tank and the homogenizing pump 6 open, so that the mixed acid solution continues to complete the full-cycle single-loop homogenization for the third preset time T3, ensuring that the acid solution reaches the microscopic uniformity required by the process.

[0083] After the homogenization process of the third preset time T3 is completed, the controller issues valve switching and pump start commands: if the first storage tank 1 has completed mixing, the first circulation valve 81 and the first return valve 84 are closed, and the first output valve 82 is opened; if the second storage tank 2 has completed mixing, the second circulation valve 85 and the second return valve 88 are closed, and the second output valve 86 is opened; at the same time, the delivery pump 7 is started to input the finished acid solution that has been mixed in the storage tank into the finished product tank 3 through the delivery pipeline 4 from the delivery port 31, completing the final output of the finished acid solution.

[0084] This invention discloses an alternating cycle acid mixing method for flow batteries. By switching between two storage tanks, the mixing, output, and injection processes are connected in parallel, avoiding production interruptions caused by emptying and cleaning in traditional single-tank processes. This achieves continuous acid mixing production and significantly improves production efficiency. While one storage tank is mixing and homogenizing, the other tank can simultaneously complete injection or pre-circulation operations, effectively shortening equipment downtime and improving the utilization efficiency of core equipment such as homogenizing pumps and transfer pumps. Furthermore, by predicting in real time whether the cumulative acid volume reaches the production requirement during the production process, the production progress can be precisely controlled, avoiding overproduction or insufficient production. This adapts to the flexible needs of different batch production, simplifies the process structure, and reduces equipment investment and operating costs.

[0085] By measuring the total acid concentration of multiple batches of mixed acid products, it was found that the RSD of the concentration fluctuation between batches of mixed acid products prepared by this method was <0.5%, while the RSD of multiple batches of mixed acid products prepared by traditional stirring paddle mixing was between 3% and 5%, indicating that the method of the present invention also significantly improves the consistency of concentration between batches.

[0086] The steps of the various methods described above are only for clarity. In practice, they can be combined into one step or some steps can be split into multiple steps. As long as they include the same logical relationship, they are all within the scope of protection of this patent. Adding insignificant modifications or introducing insignificant designs to the process, but without changing the core design of the algorithm and process, are also within the scope of protection of this patent.

[0087] like Figure 3 As shown, the third embodiment of the present invention relates to an alternating cycle mixed acid system for a flow battery, comprising: a first pre-cycle module 201, a first mixed acid module 202, a first mixing judgment module 203, a first mixing and acid injection module 204, a first output and pre-cycle module 205, a second mixed acid module 206, a second mixing judgment module 207, a second mixing and acid injection module 208, a second output and pre-cycle module 209, and a mixed acid completion output module 210.

[0088] Specifically, the first pre-circulation module 201 is used to inject A acid solution into the first storage tank and B acid solution into the second storage tank. During the first preset time T1, the homogenizing pump drives the A acid solution in the first storage tank to circulate. The first acid mixing module 202 is used to draw the B acid solution in the second storage tank into the homogenizing pump and mix it with the A acid solution during the second preset time T2. The mixed acid solution is then returned to the first storage tank, achieving preliminary mixing of the acid solutions. The first mixing judgment module 203 is used to perform single-cycle mixing of the mixed solution in the first storage tank during the third preset time T3 and predict the completion of mixing. If the accumulated acid solution meets the production output, it proceeds to the mixing and acid injection module 204; if it does, it proceeds to the mixing and acid output module 210. The first mixing and acid injection module 204, within a third preset time T3, continuously performs single-cycle mixing of the mixed solution in the first storage tank while simultaneously injecting A acid solution into the second storage tank. The first output and pre-circulation module 205, within a first preset time T1, outputs the mixed acid solution from the first storage tank to the finished product tank, then adds B acid solution to the first storage tank, while a homogenizing pump circulates the A acid solution in the second storage tank. The second mixing module... Block 206 is used to draw the B acid solution from the first storage tank into a homogenizing pump and mix it with the A acid solution within a second preset time period T2. The mixed acid solution is then returned to the second storage tank. The second mixing judgment module 207 is used to perform a single-cycle mixing of the mixed solution in the second storage tank within a third preset time period T3, and to predict whether the cumulative acid solution after mixing meets the production output. If not, it proceeds to the second mixing and acid injection module 208; if it does, it proceeds to the mixing completion output module 210. The second mixing and acid injection module 208 is used to, within the third preset time period T3, transfer the mixed solution from the second storage tank to the second storage tank. While the single-cycle mixing continues, A acid solution is injected into the first storage tank; the second output and pre-circulation module 209 is used to output the acid solution after mixing in the second storage tank to the finished product tank within a first preset time T1, and then add B acid solution to the second storage tank. At the same time, the homogenizing pump drives the A acid solution in the first storage tank to circulate. After the circulation is completed, it returns to the first acid mixing module 202; the acid mixing completion output module 210 is used to transport the acid solution after mixing in the storage tank to the finished product tank after the single-cycle mixing of the mixed solution in the storage tank for a third preset time T3 when the production prediction result is to meet the production output.

[0089] It is not difficult to see that this embodiment is a device embodiment corresponding to the second embodiment, and this embodiment can be implemented in conjunction with the second embodiment. The relevant technical details mentioned in the second embodiment are still valid in this embodiment, and will not be repeated here to reduce repetition. Accordingly, the relevant technical details mentioned in this embodiment can also be applied to the second embodiment.

[0090] It is worth mentioning that all modules involved in this embodiment are logical modules. In practical applications, a logical unit can be a physical unit, a part of a physical unit, or a combination of multiple physical units. Furthermore, to highlight the innovative aspects of this invention, this embodiment does not introduce units that are not closely related to solving the technical problem proposed by this invention; however, this does not mean that other units are absent from this embodiment.

[0091] The fourth embodiment of the present invention relates to a network-side server, such as... Figure 4 As shown, it includes at least one processor 302; and a memory 301 communicatively connected to at least one processor 302; wherein the memory 301 stores instructions executable by at least one processor 302, the instructions being executed by at least one processor 302 to enable at least one processor 302 to perform the above-described data processing method.

[0092] The memory 301 and processor 302 are connected via a bus, which may include any number of interconnecting buses and bridges. The bus connects various circuits of one or more processors 302 and memory 301 together. The bus can also connect various other circuits, such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. A bus interface provides an interface between the bus and the transceiver. The transceiver can be a single element or multiple elements, such as multiple receivers and transmitters, providing a unit for communicating with various other devices over a transmission medium. Data processed by processor 302 is transmitted over a wireless medium via an antenna, which further receives data and transmits it to processor 302.

[0093] Processor 302 is responsible for managing the bus and general processing, and can also provide various functions, including timing, peripheral interfaces, voltage regulation, power management, and other control functions. Memory 301 can be used to store data used by processor 302 during operation.

[0094] The fifth embodiment of the present invention relates to a computer-readable storage medium storing a computer program. When executed by a processor, the computer program implements the alternating cycle mixing acid method for a flow battery as described in the second embodiment.

[0095] That is, those skilled in the art will understand that all or part of the steps in the methods of the above embodiments can be implemented by a program instructing related hardware. This program is stored in a storage medium and includes several instructions to cause a device (which may be a microcontroller, chip, etc.) or processor to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as a USB flash drive, a portable hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0096] The above descriptions are merely embodiments of the present invention. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are aware of all existing technologies in that field, and have the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, under the guidance of this application, improve and implement this solution in combination with their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of the present invention. These should also be considered within the scope of protection of the present invention, and will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

[0097] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An alternating cycle acid mixing device for a flow battery, characterized in that, include: The system comprises a first storage tank, a second storage tank, a finished product tank, a delivery pipeline connecting the first storage tank, the second storage tank, and the finished product tank, a filling pump, a homogenizing pump, a delivery pump, and a valve assembly installed on the delivery pipeline. The homogenizing pump is used to generate negative pressure to draw in acid solution, thereby achieving uniform mixing of the two acid solutions. The homogenizing pump includes a first inlet, a second inlet, and an outlet located on the side of the pump body. The valve assembly is used to switch the flow direction of the delivery pipeline, thereby enabling the switching of different working stages of acid mixing and the continuous operation of the alternating cyclic acid mixing process.

2. The alternating cycle acid mixing device for a flow battery according to claim 1, characterized in that, The homogenizing pump includes a stator and a rotor disposed inside the pump body. The stator is fixedly installed inside the pump body, and the rotor is a rotating component disposed inside the stator. The stator and the rotor generate high-speed relative motion through a motor, and the second inlet is opened at the center of the stator.

3. The alternating cycle acid mixing device for a flow battery according to claim 2, characterized in that, The first inlet is connected to the first liquid outlet of the first storage tank and the second liquid outlet of the second storage tank through the delivery pipeline. The second inlet is connected to the first liquid outlet of the first storage tank and the second liquid outlet of the second storage tank. The outlet is connected to the first liquid return port of the first storage tank and the second liquid return port of the second storage tank.

4. The alternating cycle acid mixing device for a flow battery according to claim 1, characterized in that, The valve assembly includes a first circulation valve, a first output valve, and a first filling valve disposed at the first outlet of the first storage tank; a first return valve disposed at the first return port of the first storage tank; a second circulation valve, a second output valve, and a second filling valve disposed at the second outlet of the second storage tank; and a second return valve disposed at the second return port of the second storage tank.

5. The alternating cycle acid mixing device for a flow battery according to claim 4, characterized in that, The first circulation valve is installed on the delivery pipeline between the first outlet of the first storage tank and the first inlet of the homogenizing pump, and is used to control the flow of the acid solution in the first storage tank 1 from the first outlet into the first inlet of the homogenizing pump through the delivery pipeline. The first output valve is installed on the delivery pipeline between the first outlet of the first storage tank and the input end of the delivery pump, and is used to control the flow of the finished acid solution in the first storage tank from the first outlet into the delivery pipeline of the delivery pump input end. The first filling valve is installed on the delivery pipeline between the first outlet of the first storage tank and the second inlet of the homogenizing pump, and is used to control the opening and closing of the delivery pipeline from the first outlet of the first storage tank to the negative pressure of the second inlet of the homogenizing pump for the acid solution in the first storage tank. The first return valve is installed on the delivery pipeline between the first return port of the first storage tank and the outlet of the homogenizing pump, and is used to control the flow of acid solution from the outlet of the homogenizing pump into the first return port of the first storage tank.

6. The alternating cycle acid mixing device for a flow battery according to claim 5, characterized in that, The second circulation valve is installed on the delivery pipeline between the second outlet of the second storage tank and the first inlet of the homogenizing pump, and is used to control the flow of the acid solution from the second storage tank into the first inlet of the homogenizing pump from the second outlet of the delivery pipeline. The second output valve is installed on the delivery pipeline between the second outlet of the second storage tank and the input end of the delivery pump, and is used to control the flow of the finished acid solution in the second storage tank from the second outlet into the delivery pipeline at the input end of the delivery pump. The second filling valve is installed on the delivery pipeline between the second outlet of the second storage tank and the second inlet of the homogenizing pump, and is used to control the opening and closing of the delivery pipeline from the second outlet of the second storage tank to the negative pressure of the second inlet of the homogenizing pump for the acid solution in the second storage tank. The second return valve is installed on the delivery pipeline between the second return port of the second storage tank and the outlet of the homogenizing pump, and is used to control the flow of acid solution from the outlet of the homogenizing pump into the second return port of the second storage tank.

7. A method for alternating cycle mixing of acids in a flow battery, characterized in that, The alternating cycle mixing acid apparatus applied to the flow battery according to any one of claims 1-6, the method comprising: S1, inject A acid solution into the first storage tank and B acid solution into the second storage tank. During the first preset time T1, the homogenizing pump drives the A acid solution in the first storage tank to circulate. S2, within the second preset time T2, the B acid solution in the second storage tank is drawn into the homogenizing pump and mixed with the A acid solution. The mixed acid solution is then returned to the first storage tank, thus achieving the initial mixing of the acid solution. S3, within the third preset time T3, the mixed solution in the first storage tank is mixed in a single cycle, and it is predicted whether the cumulative acid solution after mixing meets the production output. If it does not meet the output, proceed to step S4; if it does meet the output, proceed to step S10. S4, during the third preset time T3, while the mixed solution in the first storage tank is continuously mixed in a single cycle, A acid solution is injected into the second storage tank. S5, within the first preset time T1, the acid solution after mixing in the first storage tank is output to the finished product tank, and then B acid solution is added to the first storage tank, while the homogenizing pump drives the A acid solution in the second storage tank to circulate. S6, within the second preset time T2, the B acid solution in the first storage tank is drawn into the homogenizing pump and mixed with the A acid solution, and the mixed acid solution is returned to the second storage tank; S7. Within the third preset time T3, the mixed solution in the second storage tank is mixed in a single cycle, and it is predicted whether the cumulative acid solution after mixing meets the production output. If it does not meet the output, proceed to step S8; if it does meet the output, proceed to step S10. S8, During the third preset time T3, while the mixed solution in the second storage tank is continuously mixed in a single cycle, A acid solution is injected into the first storage tank. S9, within the first preset time T1, the acid solution after mixing in the second storage tank is output to the finished product tank, and then B acid solution is added to the second storage tank. At the same time, the homogenizing pump drives the A acid solution in the first storage tank to circulate. After the circulation is completed, return to step S2. S10, when the production forecast result in step S3 or step S7 is sufficient to meet the production output, after the mixed solution in the storage tank is mixed in a single cycle for a third preset time T3, the acid solution after mixing is transported to the finished product tank.

8. The alternating acid mixing method for a flow battery according to claim 7, characterized in that, In step S3, the step of determining whether the cumulative acid solution after mixing meets the production output includes: adding the volume of the acid solution after mixing in the first storage tank to the volume of the mixed acid solution already stored in the finished product tank to calculate the total cumulative mixed acid solution; comparing the total cumulative mixed acid solution with the production output threshold preset in the production process; if the total cumulative mixed acid solution does not reach the production output threshold, it is determined that the production output is not met, and the process proceeds to step S4 to continue alternating production; if the total cumulative mixed acid solution reaches the production output threshold, it is determined that the production output is met, and the process proceeds to step S10 to complete the final output of the finished acid solution.

9. The alternating cyclic mixing acid method for a flow battery according to claim 7, characterized in that, In S4, the step of continuously mixing the mixed solution in the first storage tank in a single cycle while injecting the A acid solution into the second storage tank during the third preset time T3 includes: continuously mixing the mixed solution in the first storage tank in a single cycle during the third preset time T3, and injecting the A acid solution into the second storage tank when the production forecast result is determined to be insufficient.

10. An alternating cycle mixed acid system for a flow battery, characterized in that, The alternating cycle mixed acid method applied to the flow battery of claim 7, the system comprising: The first pre-circulation module is used to inject A acid solution into the first storage tank and B acid solution into the second storage tank. During the first preset time T1, the homogenizing pump drives the A acid solution in the first storage tank to circulate. The first acid mixing module is used to draw the B acid solution in the second storage tank into the homogenizing pump and mix it with the A acid solution within the second preset time T2. The mixed acid solution is then returned to the first storage tank to achieve the initial mixing of the acid solution. The first mixing judgment module is used to perform single-cycle mixing of the mixed solution in the first storage tank within the third preset time T3, and to predict whether the cumulative acid solution after mixing meets the production output. If it does not meet the output, it enters the mixing and acid injection module; if it does meet the output, it enters the acid mixing completion output module. In the first mixing and acid injection module, during the third preset time T3, the mixing solution in the first storage tank is continuously mixed in a single cycle while A acid solution is injected into the second storage tank. The first output and pre-circulation module is used to output the acid solution after mixing in the first storage tank to the finished product tank within the first preset time T1, and then add B acid solution to the first storage tank, while the homogenizing pump drives the A acid solution in the second storage tank to circulate. The second acid mixing module is used to draw the B acid solution in the first storage tank into the homogenizing pump and mix it with the A acid solution within the second preset time T2, and the mixed acid solution is returned to the second storage tank. The second mixing judgment module is used to perform single-cycle mixing of the mixed solution in the second storage tank within the third preset time T3, and to predict whether the cumulative acid solution after mixing meets the production output. If it does not meet the output, it enters the second mixing and acid injection module; if it meets the output, it enters the acid mixing completion output module. The second mixing and acid injection module is used to inject A acid solution into the first storage tank while the mixing solution in the second storage tank is continuously mixed in a single cycle within a third preset time T3. The second output and pre-circulation module is used to output the acid solution after mixing in the second storage tank to the finished product tank within the first preset time T1. Then, B acid solution is added to the second storage tank, while the homogenizing pump drives the A acid solution in the first storage tank to circulate. After the circulation is completed, it returns to the first mixed acid module. The mixed acid output module is used to transport the mixed acid solution to the finished product tank after a third preset time T3 of single-cycle mixing of the mixed solution in the storage tank when the production forecast result is sufficient to meet the production output.

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