Management System and Working Method for Flow Batteries

Abstract

The present invention belongs to the technical field of directly converting chemical energy into electrical energy, and particularly relates to a management system and working method for a flow battery. The management system for the flow battery includes: a pump body; a data acquisition unit for acquiring the viscosity and temperature of the electrolyte before the pump, and the temperature of the electrolyte inside the pump; a control module electrically connected to the pump body and configured to adjust the flow rate of the electrolyte according to the viscosity of the electrolyte before the pump and according to a preset charge-discharge power; wherein the control module is further configured to adjust the corresponding pumping force of the pump body according to the required flow rate of the electrolyte. The management system and working method for the flow battery obtain the viscosity data of the electrolyte to be fed into the pump body through a viscosity sensor. When the viscosity data of the electrolyte changes, the flow rate of the electrolyte is changed by adjusting the pumping force of the pump body, thereby stabilizing the power of the flow battery.

Description

Technical Field

[0001] The present invention belongs to the technical field of directly converting chemical energy into electrical energy, specifically relates to electrolytes, and particularly relates to a management system and working method for a flow battery. Background Art

[0002] Due to its unique advantages such as high safety, long life, and low cost, the all-vanadium flow battery is very suitable for energy storage systems with large capacity and long-term operation; as time goes by, the vanadium ions in the electrolyte will undergo redox reactions, resulting in changes in the chemical composition of the solution, causing changes in viscosity and affecting the fluidity of the liquid, and further leading to changes in the power of the flow battery.

[0003] When the fluidity of the electrolyte changes, that is, after the viscosity changes, the charge and discharge power of the flow battery will fluctuate accordingly. In related technologies, a viscosity sensor is usually used to obtain the viscosity of the electrolyte, and the pumping force of the electrolyte is adjusted according to the change in viscosity to overcome the poor flow caused by the viscosity change.

[0004] When the battery is in a high-power discharge state, it may be necessary to increase the electrolyte flow rate to ensure sufficient current density; while in a low-power discharge or charge state, the electrolyte flow rate can be appropriately reduced to save energy consumption.

[0005] However, there is still a significant problem in the implementation of the above solution. If only the viscosity parameter is considered, it is easy to cause over-adjustment or under-adjustment. Therefore, how to avoid this phenomenon is a technical problem that needs to be solved urgently in this field.

[0006] It should be noted that the above information disclosed in this background art section is only used to understand the background art of the concept of this application. Therefore, the above description is not considered as information of the prior art. Summary of the Invention

[0007] The embodiments of the present disclosure at least provide a management system and a working method for a flow battery.

[0008] In a first aspect, the embodiments of the present disclosure provide a management system for a flow battery, including: a pump body; a data acquisition unit configured to acquire the viscosity and temperature of the electrolyte before the pump, and acquire the temperature of the electrolyte inside the pump; a control module electrically connected to the pump body and configured to adjust the flow rate of the electrolyte according to the viscosity of the electrolyte before the pump and according to a preset charge and discharge power; wherein the control module is further configured to adjust the corresponding pumping force of the pump body according to the required flow rate of the electrolyte; the control module is further configured to obtain the viscosity of the electrolyte inside the pump according to the temperature of the electrolyte inside the pump, and correct the pumping force of the pump body according to the viscosity of the electrolyte inside the pump.

[0009] In an alternative embodiment, the control module is configured to adjust the flow rate of the electrolyte according to the viscosity of the electrolyte before the pump and according to a preset charge-discharge power, that is

[0010] The set flow rate formula is: ;

[0011] Wherein, Q is the flow rate of the electrolyte, with the unit of m³ / s; R is the liquid constant, with the unit of kg·m 2 / (s 2 ·mol·K); k 4 is the adjustment coefficient, with the unit of s 2 ; T 0 is the temperature of the electrolyte before the pump, with the unit of K; n is the number of electrons transferred in the reaction; M is the Faraday constant, with the unit of C / mol; c is the ion concentration, with the unit of mol / m 3 ; A 1 is the effective area of the electrode, with the unit of m 2 ; k 1 is the proportionality constant of the flow rate and the mass transfer coefficient, with the unit of s -2 / 3 ; U is the open circuit voltage of the flow battery, with the unit of V; P is the preset charge-discharge power, with the unit of W; r is the effective ion radius, with the unit of m; L is the conduction path length, with the unit of m; z is the ion charge number; k 2 is the Boltzmann constant, with the unit of J / K; A 2 is the cross-sectional area of ion conduction, with the unit of m 2 ; η 0 is the viscosity of the electrolyte before the pump, with the unit of kg / (m·s).

[0012] In an alternative embodiment, the control module is further configured to adjust the corresponding pumping force of the pump body according to the required flow rate of the electrolyte, that is

[0013] The set pumping force formula is: ;

[0014] Wherein, F 0 is the pumping force of the pump body, with the unit of N; k 3is a constant related to the characteristics of the pump and the pipeline, with the unit of N / (Pa·m); A is the cross-sectional area of the pipeline, with the unit of m 2 .

[0015] In an alternative embodiment, the control module is further configured to obtain the viscosity of the electrolyte in the pump according to the temperature of the electrolyte in the pump, and correct the pumping force of the pump body according to the viscosity of the electrolyte in the pump, that is

[0016] Set the viscosity formula as: ;

[0017] wherein, η is the viscosity of the electrolyte in the pump, with the unit of kg / (m·s); Ea is the activation energy value, with the unit of J / mol; T is the temperature of the electrolyte in the pump, with the unit of K; Ra is the ideal gas constant, with the unit of J / (mol·K);

[0018] Set the corrected pumping force formula as: ;

[0019] wherein, F is the pumping force of the corrected electrolyte, with the unit of N.

[0020] In a second aspect, the embodiments of the present disclosure further provide a method for collecting the viscosity and temperature of the electrolyte before the pump, and presetting the charge and discharge power; adjusting the flow rate of the electrolyte according to the collected data and the preset charge and discharge power; adjusting the pumping force of the pump body according to the required flow rate data so that the electrolyte is transported at the required flow rate; collecting the temperature of the electrolyte in the pump, and obtaining the viscosity of the electrolyte in the pump according to the temperature difference; correcting the pumping force of the pump body according to the viscosity of the electrolyte in the pump.

[0021] In an alternative embodiment, the method for collecting the viscosity and temperature of the electrolyte before the pump, and presetting the charge and discharge power includes: obtaining the viscosity data of the electrolyte before the pump through a viscosity sensor η 0 ; obtaining the temperature data of the electrolyte before the pump through a first temperature sensor T 0 ; presetting the required charge and discharge power through a control panel P .

[0022] In an alternative embodiment, the method for adjusting the flow rate of the electrolyte according to the collected data and the preset charge and discharge power includes:

[0023] Set the flow rate formula as: ;

[0024] wherein, Qis the flow rate of the electrolyte, with the unit of m³ / s; R is the liquid constant, with the unit of kg·m 2 / (s 2 ·mol·K); k 4 is the adjustment coefficient, with the unit of s 2 ; T 0 is the temperature of the electrolyte before the pump, with the unit of K; n is the number of electrons transferred during the reaction; M is the Faraday constant, with the unit of C / mol; c is the ion concentration, with the unit of mol / m 3 ; A 1 is the effective area of the electrode, with the unit of m 2 ; k 1 is the proportionality constant between the flow rate and the mass transfer coefficient, with the unit of s -2 / 3 ; U is the open-circuit voltage of the flow battery, with the unit of V; P is the preset charge-discharge power, with the unit of W; r is the effective ion radius, with the unit of m; L is the conduction path length, with the unit of m; z is the ion charge number; k 2 is the Boltzmann constant, with the unit of J / K; A 2 is the cross-sectional area of ion conduction, with the unit of m 2 ; η 0 is the viscosity of the electrolyte before the pump, with the unit of kg / (m·s).

[0025] In an alternative embodiment, the method of adjusting the pumping force of the pump body according to the required flow rate data to deliver the electrolyte at the required flow rate includes:

[0026] Set the pumping force formula as: ;

[0027] Wherein, F 0 is the pumping force of the pump body, with the unit of N; k 3 is the constant related to the characteristics of the pump and the pipeline, with the unit of N / (Pa·m); A is the cross-sectional area of the pipeline, with the unit of m 2 .

[0028] In an alternative embodiment, the method for collecting the temperature of the electrolyte in the collection pump and obtaining the viscosity of the electrolyte in the pump based on the temperature difference includes:

[0029] Obtaining the temperature of the electrolyte in the pump through a second temperature sensor T ;

[0030] Obtaining the viscosity of the electrolyte in the pump based on the temperature difference between the electrolyte before the pump and the electrolyte in the pump η ;

[0031] Among them, the method for obtaining the viscosity of the electrolyte in the pump based on the temperature difference between the electrolyte before the pump and the electrolyte in the pump η includes:

[0032] Setting the viscosity formula as: ;

[0033] Among them, η is the viscosity of the electrolyte in the pump, with the unit of kg / (m·s); Ea is the activation energy value, with the unit of J / mol; T is the temperature of the electrolyte in the pump, with the unit of K; Ra is the ideal gas constant, with the unit of J / (mol·K).

[0034] In an alternative embodiment, the method for correcting the pumping force of the pump body based on the viscosity of the electrolyte in the pump includes:

[0035] Setting the corrected pumping force formula as: ;

[0036] Among them, F is the corrected pumping force of the electrolyte, with the unit of N.

[0037] The beneficial effect of the present invention is that the management system and working method for the flow battery obtain the viscosity data of the electrolyte before the pump through the viscosity sensor. When the viscosity data of the electrolyte changes, the flow rate of the electrolyte is changed by adjusting the pumping force of the pump body, thereby stabilizing the charge and discharge power of the flow battery; at the same time, when adjusting the pumping force of the pump body, the temperature of the electrolyte will increase, which will in turn cause the viscosity of the electrolyte in the pump to decrease. Therefore, the viscosity of the electrolyte in the pump is obtained by collecting the temperature data of the electrolyte in the pump, thereby correcting the pumping force of the pump body so that the electrolyte is transported at the required flow rate.

[0038] Other features and advantages of the present invention will be described in the subsequent specification, and, in part, will be obvious from the specification, or will be understood by implementing the present invention. The objectives and other advantages of the present invention are achieved and obtained by the structures specifically pointed out in the specification and the drawings.

[0039] To make the above objects, features, and advantages of the present invention more apparent and understandable, specific preferred embodiments are hereby given, and in conjunction with the accompanying drawings, the detailed description is as follows. Description of the Drawings

[0040] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0041] Figure 1 A flowchart of a working method for a management system for a flow battery provided by an embodiment of the present disclosure;

[0042] Figure 2 A control schematic diagram of a control module provided by an embodiment of the present disclosure. Specific Embodiments

[0043] 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 in conjunction with the drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0044] The flow battery at least includes a pump body and an infusion tube, and the working of the pump body causes the electrolyte to flow in the infusion tube; as the usage time progresses, the viscosity of the electrolyte will gradually increase. At this time, if the pumping force of the pump body remains unchanged, the flow rate of the electrolyte will decrease, thereby affecting the charge-discharge power of the flow battery.

[0045] It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. In addition, in the drawings, for the effective description of the technical content, the thickness of the components can be exaggerated or reduced.

[0046] The following will, in conjunction with the drawings, elaborate on some embodiments of the present invention. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0047] At least one embodiment provides a management system for a flow battery, including: a pump body; a data acquisition unit configured to acquire the viscosity data and temperature data of the electrolyte before the pump, and the temperature data of the electrolyte inside the pump; a control module electrically connected to the pump body and configured to adjust the flow rate of the electrolyte according to the viscosity data of the electrolyte before the pump and according to a preset charge-discharge power; wherein the control module is further configured to adjust the corresponding pumping force of the pump body according to the required flow rate of the electrolyte; the control module is further configured to obtain the viscosity of the electrolyte inside the pump according to the temperature of the electrolyte inside the pump, and correct the pumping force of the pump body according to the viscosity of the electrolyte inside the pump.

[0048] In this embodiment, the viscosity data of the electrolyte before the pump is obtained by a viscosity sensor. When the viscosity data of the electrolyte changes, the flow rate of the electrolyte is changed by adjusting the pumping force of the pump body, so as to stabilize the charge-discharge power of the flow battery; at the same time, when changing the pumping force of the pump body, it will cause the temperature of the electrolyte to change, thereby changing the viscosity of the electrolyte inside the pump, and further causing the flow rate when transporting the electrolyte with this pumping force to be different from the required one; therefore, in this embodiment, the viscosity data of the electrolyte inside the pump is obtained by acquiring the temperature data of the electrolyte inside the pump, so as to correct the pumping force of the pump body and make the electrolyte be transported at the required flow rate.

[0049] In some embodiments, the control module is configured to adjust the flow rate of the electrolyte according to the viscosity of the electrolyte before the pump and according to a preset charge-discharge power, that is

[0050] The set flow formula is: ;

[0051] Wherein, Q is the flow rate of the electrolyte, with the unit of m³ / s; R is a liquid constant, with the unit of kg·m 2 / (s 2 ·mol·K); k 4 is an adjustment coefficient, which is obtained based on multiple experiments, with the unit of s 2 ; T 0 is the temperature of the electrolyte before the pump, with the unit of K; n is the number of electrons transferred in the reaction; M is the Faraday constant, with the unit of C / mol; c is the ion concentration, with the unit of mol / m 3 ; A 1 is the effective area of the electrode, with the unit of m 2 ; k 1 is the proportional constant of the flow rate and the mass transfer coefficient, which describes the influence of flow on mass transfer, with the unit of s -2 / 3 ; Uis the open-circuit voltage of the flow battery, in V; P is the preset charge-discharge power, in W; r is the effective ionic radius, in m; L is the conduction path length, i.e., the effective distance of ion conduction in the electrolyte, in m; z is the ionic charge number; k 2 is the Boltzmann constant, in J / K; A 2 is the ion conduction cross-sectional area, in m 2 ; η 0 is the viscosity of the electrolyte before the pump, in kg / (m·s).

[0052] In this embodiment, during the operation of the flow battery, the viscosity data of the electrolyte before the pump is collected by a viscosity sensor η 0 , and according to the preset charge-discharge power P , the required electrolyte flow rate is calculated Q , and then the pumping force of the pump body is regulated according to the required electrolyte flow rate Q .

[0053] In some embodiments, the control module is further configured to adjust the corresponding pumping force of the pump body according to the required flow rate of the electrolyte, that is

[0054] the pumping force formula is set as: ;

[0055] wherein, F 0 is the pumping force of the pump body, in N; k 3 is a constant related to the pump and pipeline characteristics, in N / (Pa·m); A is the pipeline cross-sectional area, in m 2 ; wherein, k 3 is obtained by multiple measurements and fitting, and its range is 4×10 6 N / (Pa·m) to 6×10 6 N / (Pa·m).

[0056] In this embodiment, the pumping force of the pump body is related to the flow rate of the electrolyte Q , the viscosity of the electrolyte, and the cross-sectional area of the conveying pipeline A , so the pumping force of the pump body can be obtained according to the above parameters. When the required flow rate of the electrolyte Q changes, the control module can adjust the pumping force by controlling the pump body to make the electrolyte be conveyed at the required flow rate.

[0057] In some embodiments, when the pump body changes the pumping force, it will affect the temperature of the electrolyte, and then affect the viscosity of the electrolyte. Therefore, if the temperature is not taken into account, the pump body will pump the electrolyte with a pumping force F 0 When transporting the electrolyte, the flow rate of the electrolyte Q is not the actual required value and there is a certain error; therefore, the control module is further configured to obtain the viscosity of the electrolyte in the pump according to the temperature of the electrolyte in the pump, and correct the pumping force of the pump body according to the viscosity of the electrolyte in the pump, that is

[0058] Set the viscosity formula as: ;

[0059] Where η is the viscosity of the electrolyte in the pump, with the unit of kg / (m·s); Ea is the activation energy value, with the unit of J / mol; T is the temperature of the electrolyte in the pump, with the unit of K; Ra is the ideal gas constant, with the unit of J / (mol·K).

[0060] Set the formula for the corrected pumping force as: ;

[0061] Where F is the pumping force of the corrected electrolyte, with the unit of N.

[0062] In this embodiment, when adjusting the pump body to F 0 After transporting the electrolyte with a pumping force, collect the temperature data of the electrolyte in the pump, and calculate the viscosity data of the electrolyte in the pump according to the temperature data of the electrolyte in the pump η , with this viscosity data η to correct the existing pumping force F 0 to obtain the actual required flow rate of the electrolyte Q .

[0063] Specifically, in order to reduce the delay, this embodiment uses the viscosity of the electrolyte in the pump instead of the viscosity of the electrolyte after the pump; however, the viscosity data of the electrolyte in the pump is not easy to collect, so the viscosity data of the electrolyte in the pump is converted by collecting the temperature data of the electrolyte in the pump.

[0064] As Figure 2 shown, in some embodiments, the control module can but is not limited to using a PLC. The control module is electrically connected to the first temperature sensor, the second temperature sensor, the viscosity sensor, and the pump body. The control module controls the operation of the pump body according to the corresponding data collected by the first temperature sensor, the second temperature sensor, and the viscosity sensor.

[0065] In an alternative embodiment, the liquid constant R is 8.314 kg·m 2 / (s 2 ·mol·K); the temperature of the electrolyte before the pump T 0 is 298K; the number of electrons transferred in the reaction n is 1; the Faraday constant M is 96485 C / mol; the ion concentration c is 1.6×10 3 mol / m 3 ; the effective area of the electrode A 1 is 1 m 2 ; the proportionality constant of the flow rate and the mass transfer coefficient k 1 is 1.0×10 -6 s -2 / 3 ; the open-circuit voltage of the flow battery U is 1.4V; the preset charge-discharge power P is 98W; the effective ion radius r is 3.0×10 -10 m; the conduction path length L is 5.0×10 -3 m; the ion charge number z is 1; the Boltzmann constant k 2 is 1.38×10 -23 J / K; the cross-sectional area of ion conduction A 2 is 1 m 2 ; the viscosity of the electrolyte before the pump η 0 is 1.2×10 -3 kg / (m·s); the constant related to the characteristics of the pump and the pipeline k 3 is 5×10 6 N / (Pa·m); k 4 is 1 s 2 ; the activation energy value Ea is 15000 J / mol; the temperature of the electrolyte in the pump T is 301K; the ideal gas constant Ra is 8.314 J / (mol⋅K); the cross-sectional area of the pipeline A is 0.002 m 2 .

[0066] According to the above parameters, the flow rate , that is Q =9.56×10-5 m³ / s.

[0067] According to the above parameters, the pumping force , that is F 0 = 286.8 N.

[0068] According to the above parameters, the viscosity inside the pump , that is η = 1.14×10 -3 kg / (m·s).

[0069] According to the above parameters, the corrected pumping force , that is F = 272.46 N.

[0070] As Figure 1 shown, at least one embodiment provides a working method for a management system of a flow battery, including: collecting the viscosity and temperature of the electrolyte before the pump, and presetting the charge and discharge power; adjusting the flow rate of the electrolyte according to the collected data and the preset charge and discharge power; adjusting the pumping force of the pump body according to the required flow rate data so that the electrolyte is transported at the required flow rate; collecting the temperature of the electrolyte inside the pump, and obtaining the viscosity of the electrolyte inside the pump according to the temperature difference; correcting the pumping force of the pump body according to the viscosity of the electrolyte inside the pump.

[0071] In this embodiment, the viscosity data of the electrolyte before the pump is obtained through a viscosity sensor. When the viscosity data of the electrolyte changes, the flow rate of the electrolyte is changed by adjusting the pumping force of the pump body, so as to stabilize the charge and discharge power of the flow battery; at the same time, when adjusting the pumping force of the pump body, the temperature of the electrolyte will increase, which will in turn cause the viscosity of the electrolyte inside the pump to decrease. Therefore, the viscosity of the electrolyte inside the pump is obtained by collecting the temperature data of the electrolyte inside the pump, so as to correct the pumping force of the pump body and make the electrolyte transported at the required flow rate.

[0072] In some embodiments, the method of collecting the viscosity and temperature of the electrolyte before the pump and presetting the charge and discharge power includes: obtaining the viscosity data of the electrolyte before the pump through a viscosity sensor η 0 ; obtaining the temperature data of the electrolyte before the pump through a first temperature sensor T 0 ; presetting the required charge and discharge power through a control panel P .

[0073] In some embodiments, the method of adjusting the flow rate of the electrolyte according to the collected data and the preset charge and discharge power includes:

[0074] Setting the flow rate formula as: ;

[0075] Wherein,Q is the flow rate of the electrolyte, with the unit of m³ / s; R is the liquid constant, with the unit of kg·m 2 / (s 2 ·mol·K); k 4 is the adjustment coefficient, with the unit of s 2 ; T 0 is the temperature of the electrolyte before the pump, with the unit of K; n is the number of electrons transferred in the reaction; M is the Faraday constant, with the unit of C / mol; c is the ion concentration, with the unit of mol / m 3 ; A 1 is the effective area of the electrode, with the unit of m 2 ; k 1 is the proportionality constant of the flow rate and the mass transfer coefficient, with the unit of s -2 / 3 ; U is the open circuit voltage of the flow battery, with the unit of V; P is the preset charge and discharge power, with the unit of W; r is the effective ion radius, with the unit of m; L is the conduction path length, with the unit of m; z is the ion charge number; k 2 is the Boltzmann constant, with the unit of J / K; A 2 is the cross-sectional area of ion conduction, with the unit of m 2 ; η 0 is the viscosity of the electrolyte before the pump, with the unit of kg / (m·s).

[0076] In this embodiment, during the operation of the flow battery, the viscosity data of the electrolyte before the pump is collected by a viscosity sensor η 0 , and according to the preset charge and discharge power P , the required flow rate of the electrolyte is calculated Q , and then the pumping force of the pump body is regulated according to the required flow rate of the electrolyte Q .

[0077] In some embodiments, the method of regulating the pumping force of the pump body according to the required flow rate data so that the electrolyte is transported at the required flow rate includes:

[0078] Set the pumping force formula as: ;

[0079] Wherein, F0 is the pumping force of the pump body, with the unit of N; k 3 is a constant related to the pump and pipeline characteristics, and as an empirical constant, it is obtained through multiple experiments, with the unit of N / (Pa·m); A is the cross-sectional area of the pipeline, with the unit of m 2 .

[0080] In this embodiment, the pumping force of the pump body is related to the flow rate of the electrolyte Q , the viscosity of the electrolyte, and the cross-sectional area of the delivery pipeline A . Therefore, the pumping force of the pump body can be obtained according to the above parameters. When the required flow rate of the electrolyte Q changes, the control module can control the pump body to adjust the pumping force so that the electrolyte can be delivered at the required flow rate.

[0081] In some embodiments, when the pump body changes the pumping force, it will affect the temperature of the electrolyte, and further affect the viscosity of the electrolyte. Therefore, if the temperature is not taken into account, it will cause the flow rate of the electrolyte F 0 when the pump body delivers the electrolyte with the pumping force Q not to be the actual required value, there is a certain error; therefore, the method of collecting the temperature of the electrolyte in the pump and obtaining the viscosity of the electrolyte in the pump according to the temperature difference includes: obtaining the temperature of the electrolyte in the pump through the second temperature sensor T ; obtaining the viscosity of the electrolyte in the pump according to the temperature difference between the electrolyte before the pump and the electrolyte in the pump η ;

[0082] Among them, the method of obtaining the viscosity of the electrolyte in the pump according to the temperature difference between the electrolyte before the pump and the electrolyte in the pump η includes:

[0083] Set the viscosity formula as: ;

[0084] Among them, η is the viscosity of the electrolyte in the pump, with the unit of kg / (m·s); Ea is the activation energy value, with the unit of J / mol; Ra is the ideal gas constant, with the unit of J / (mol·K); T is the temperature of the electrolyte in the pump, with the unit of K.

[0085] In some embodiments, the method of correcting the pumping force of the pump body according to the viscosity of the electrolyte in the pump includes:

[0086] Set the corrected pumping force formula as: ;

[0087] Among them, FThe pumping force of the corrected electrolyte solution, with the unit of N.

[0088] In this embodiment, after adjusting the pump body to F 0 pump the electrolyte solution with a certain pumping force, the temperature data of the electrolyte solution in the pump is collected, and the viscosity data of the electrolyte solution in the pump is calculated based on the temperature data of the electrolyte solution in the pump η and use this viscosity data η to correct the existing pumping force F 0 to obtain the actual required flow rate of the electrolyte solution Q .

[0089] Specifically, in order to reduce latency, this embodiment uses the viscosity of the electrolyte solution in the pump instead of the viscosity of the electrolyte solution after the pump; however, the viscosity data of the electrolyte solution in the pump is not easy to collect, so the viscosity data of the electrolyte solution in the pump is converted by collecting the temperature data of the electrolyte solution in the pump.

[0090] In summary, the management system and working method for the flow battery obtain the viscosity data of the electrolyte solution before the pump through the viscosity sensor. When the viscosity data of the electrolyte solution changes, the flow rate of the electrolyte solution is changed by adjusting the pumping force of the pump body, so as to stabilize the charging and discharging power of the flow battery; at the same time, when adjusting the pumping force of the pump body, the temperature of the electrolyte solution will increase, which will cause the viscosity of the electrolyte solution in the pump to decrease. Therefore, the viscosity of the electrolyte solution in the pump is obtained by collecting the temperature data of the electrolyte solution in the pump, so as to correct the pumping force of the pump body and make the electrolyte solution be pumped at the required flow rate.

[0091] In this article, when it is mentioned that the first component is located on the second component, this may mean that the first component can be directly formed on the second component, or a third component can be inserted between the first component and the second component.

[0092] In this article, when an element or layer is referred to as "being located on", "joined to", "connected to", "attached to", or "coupled to" another element or layer, it can be directly located on, joined, connected, attached, or coupled to the other element or layer, or there may be intermediate elements or layers. On the contrary, when an element is referred to as "directly on another element or layer", "directly joined to", "directly connected to", "directly attached to", or "directly coupled to" another element or layer, there may be no intermediate elements or layers. Other words used to describe the relationship between elements should be interpreted in a similar manner (for example, "between" vs. "directly between", "adjacent" vs. "directly adjacent", etc.). As used herein, the term "and / or" includes any and all combinations of one or more of the related listed items.

[0093] In this document, example embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, expressions such as "at least one of..." modify the entire list of elements when following a list of elements, rather than modifying individual elements in the list. For example, the expression "at least one of a, b, and c" should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0094] The terms used herein are only for describing specific exemplary configurations and are not intended to be limiting. As used herein, the singular articles "a", "an", and "the" may also be intended to include the plural forms, unless clearly indicated otherwise herein. The terms "comprising", "including", and "having" are inclusive and thus specify the presence of features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein should not be construed as necessarily requiring them to be performed in the particular order discussed or shown, unless specifically identified as an order of performance. Additional or alternative steps may be employed.

[0095] As used herein, phrases such as "in one embodiment", "according to one embodiment", "in some embodiments", etc. generally refer to the fact that the particular feature, structure, or characteristic after the phrase may be included in at least one embodiment of the present disclosure. Thus, a particular feature, structure, or characteristic may be included in more than one embodiment of the present disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms "example", "exemplary", etc. are used "as an example, instance, or illustration. Any embodiment, aspect, or design described herein as "example" or "exemplary" is not necessarily to be construed as preferred or superior to other embodiments, aspects, or designs. Instead, the use of the terms "example", "exemplary", etc. is intended to present concepts in a concrete manner.

[0096] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "mounted", "connected", and "coupled" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention may be understood according to specific circumstances.

[0097] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, terms such as "first", "second" and other numerical terms used herein do not imply an order or sequence unless explicitly indicated in the text. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer or section discussed above may be referred to as the second element, component, region, layer or section.

[0098] Spatially relative terms, such as "inner", "outer", "below", "beneath", "lower", "above", "upper", etc., may be used herein to describe the relationship of one element or feature to another element or feature as illustrated in the figures. In addition to the orientation depicted in the figures, spatially relative terms are intended to encompass different orientations of the device in use or operation. For example, if the device in the figures is turned over, an element described as "below" or "beneath" another element or feature will be oriented "above" the other element or feature. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein are to be interpreted accordingly.

[0099] In the above discussion, unless otherwise specified, when used to describe a numerical value, terms such as "about", "approximately", "substantially", etc. indicate a variation of + / −10% of that value.

[0100] Based on the above enlightenment of the ideal embodiments of the present invention, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of the present invention. The technical scope of the present invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A management system for a flow battery, characterized in that, Comprising: Pump body; Data acquisition unit, configured to acquire the viscosity and temperature of the electrolyte before the pump, and the temperature of the electrolyte inside the pump; Control module, electrically connected to the pump body; The control module is configured to adjust the flow rate of the electrolyte according to the viscosity of the electrolyte before the pump and according to a preset charge-discharge power, that is The set flow formula is: ; Among them, Q is the flow rate of the electrolyte, with the unit of m³ / s; R is the liquid constant, with the unit of kg·m 2 / (s 2 ·mol·K); k 4 is the adjustment coefficient, with the unit of s 2 ; T 0 is the temperature of the electrolyte before the pump, with the unit of K; n is the number of electrons transferred during the reaction; M is the Faraday constant, with the unit of C / mol; c is the ion concentration, with the unit of mol / m 3 ; A 1 is the effective area of the electrode, with the unit of m 2 ; k 1 is the proportionality constant of the flow rate and the mass transfer coefficient, with the unit of s -2 / 3 ; U is the open-circuit voltage of the flow battery, with the unit of V; P is the preset charge-discharge power, with the unit of W; r is the effective ionic radius, with the unit of m; L is the conduction path length, with the unit of m; z is the ionic charge number; k 2 is the Boltzmann constant, with the unit of J / K; A 2 is the cross-sectional area of ionic conduction, with the unit of m 2 ; η 0 is the viscosity of the electrolyte before the pump, with the unit of kg / (m·s); The control module is further configured to adjust the corresponding pumping force of the pump body according to the required flow rate of the electrolyte; The control module is further configured to obtain the viscosity of the electrolyte inside the pump according to the temperature of the electrolyte inside the pump, and correct the pumping force of the pump body according to the viscosity of the electrolyte inside the pump.

2. The management system for a flow battery according to claim 1, wherein The control module is further configured to adjust the corresponding pumping force of the pump body according to the required flow rate of the electrolyte, that is Set the pumping force formula as: ; wherein, F 0 is the pumping force of the pump body, with the unit of N; k 3 is a constant related to the pump and pipeline characteristics, with the unit of N / (Pa·m); A is the cross-sectional area of the pipeline, with the unit of m 2 .

3. The management system for a flow battery according to claim 2, wherein The control module is further configured to obtain the viscosity of the electrolyte inside the pump according to the temperature of the electrolyte inside the pump, and correct the pumping force of the pump body according to the viscosity of the electrolyte inside the pump, that is The set viscosity formula is: ; Among them, η is the viscosity of the electrolyte in the pump, with the unit of kg / (m·s); Ea is the activation energy value, with the unit of J / mol; T is the temperature of the electrolyte in the pump, with the unit of K; Ra is the ideal gas constant, with the unit of J / (mol·K); Set the corrected pumping force formula as: ; Among them, F is the pumping force of the corrected electrolyte, with the unit of N.

4. A working method of the management system for a flow battery as described in claim 1, characterized in that, Comprising: Acquire the viscosity and temperature of the electrolyte before the pump, and preset the charge-discharge power; Adjust the flow rate of the electrolyte according to the acquired data and the preset charge-discharge power; Adjust the pumping force of the pump body according to the required flow rate data, so that the electrolyte is transported at the required flow rate; Acquire the temperature of the electrolyte inside the pump, and obtain the viscosity of the electrolyte inside the pump according to the temperature difference; Correct the pumping force of the pump body according to the viscosity of the electrolyte inside the pump.

5. The working method of the management system for a flow battery according to claim 4, wherein The method for acquiring the viscosity and temperature of the electrolyte before the pump and presetting the charge-discharge power includes: Obtain the viscosity data of the electrolyte before the pump through a viscosity sensor η 0 ; Obtain the temperature data of the electrolyte before the pump through the first temperature sensor T 0 ; Preset the required charge and discharge power through the control panel P .

6. The working method of the management system for a flow battery according to claim 5, wherein The method for adjusting the flow rate of the electrolyte according to the acquired data and the preset charge-discharge power includes: The set flow formula is: ; Among them, Q is the flow rate of the electrolyte, with the unit of m³ / s; R is the liquid constant, with the unit of kg·m 2 / (s 2 ·mol·K); k 4 is the adjustment coefficient, with the unit of s 2 ; T 0 is the temperature of the electrolyte before the pump, with the unit of K; n is the number of electrons transferred in the reaction; M is the Faraday constant, with the unit of C / mol; c is the ion concentration, with the unit of mol / m 3 ; A 1 is the effective area of the electrode, with the unit of m 2 ; k 1 is the proportionality constant of the flow rate and the mass transfer coefficient, with the unit of s -2 / 3 ; U is the open circuit voltage of the flow battery, with the unit of V; P is the preset charge and discharge power, with the unit of W; r is the effective ion radius, with the unit of m; L is the conduction path length, with the unit of m; z is the ion charge number; k 2 is the Boltzmann constant, with the unit of J / K; A 2 is the cross-sectional area of ion conduction, with the unit of m 2 ; η 0 is the viscosity of the electrolyte before the pump, with the unit of kg / (m·s).

7. The working method of the management system for a flow battery according to claim 6, wherein The method for adjusting the pumping force of the pump body according to the required flow rate data, so that the electrolyte is transported at the required flow rate includes: Set the pumping force formula as: ; Among them, F 0 is the pumping force of the pump body, with the unit of N; k 3 is a constant related to the pump and pipeline characteristics, with the unit of N / (Pa·m); A is the cross-sectional area of the pipeline, with the unit of m 2 .

8. The working method of the management system for a flow battery according to claim 7, wherein The method for acquiring the temperature of the electrolyte inside the pump and obtaining the viscosity of the electrolyte inside the pump according to the temperature difference includes: Obtain the temperature of the electrolyte inside the pump through the second temperature sensor T ; Obtain the viscosity of the electrolyte inside the pump based on the temperature difference between the electrolyte before the pump and the electrolyte inside the pump η ; wherein, obtaining the viscosity of the electrolyte in the pump according to the temperature difference between the electrolyte before the pump and the electrolyte in the pump η The method includes: The set viscosity formula is: ; Among them, η is the viscosity of the electrolyte in the pump, with the unit of kg / (m·s); Ea is the activation energy value, with the unit of J / mol; T is the temperature of the electrolyte in the pump, with the unit of K; Ra is the ideal gas constant, with the unit of J / (mol·K).

9. The working method of the management system for a flow battery according to claim 8, wherein The method for correcting the pumping force of the pump body according to the viscosity of the electrolyte inside the pump includes: Set the corrected pumping force formula as: ; Among them, F is the pumping force of the corrected electrolyte, with the unit of N.

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