Management system for flow battery and working method

Abstract

The invention belongs to the technical field of direct conversion of chemical energy into electric energy, and particularly relates to a management system for a flow battery and a working method. The data acquisition unit is used for acquiring the viscosity and temperature of the electrolyte in front of the pump and acquiring the temperature of the electrolyte in the pump; the control module is electrically connected with the pump body and is configured to adjust the flow of the electrolyte according to the viscosity of the electrolyte before pumping and the preset charging and discharging power; the control module is further configured to adjust the corresponding pumping force of the pump body according to the flow required by the electrolyte; according to the management system for the flow battery and the working method, the viscosity data of the electrolyte to enter the pump body is obtained through the viscosity sensor, and when the viscosity data of the electrolyte is changed, the flow of the electrolyte is changed by adjusting the pumping force of the pump body, so that the power of the flow battery is stabilized.

Description

Technical Field

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

[0002] All-vanadium liquid flow batteries are very suitable for large-capacity, long-term energy storage systems due to their unique advantages such as high safety, long life and low cost. As time goes by, the vanadium ions in the electrolyte will undergo redox reactions, causing the chemical composition of the solution to change, causing the viscosity to change, affecting the fluidity of the liquid, and thus causing the power of the liquid flow battery to change.

[0003] When the fluidity of the electrolyte changes, that is, the viscosity changes, the charging and discharging power of the flow battery will fluctuate. 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, the electrolyte flow rate may need to be increased to ensure sufficient current density; while in a low-power discharge or charging 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 urgently needs to be solved in this field.

[0006] It should be noted that the above information disclosed in this background technology section is only used to understand the background technology of the present application concept, and therefore, the above description is not considered to constitute information of the prior art. Summary of the invention

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

[0008] In a first aspect, an embodiment of the present disclosure provides a management system for a liquid flow battery, comprising: a pump body; a data acquisition unit, used to collect the viscosity and temperature of the electrolyte before the pump, and the temperature of the electrolyte in 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 also configured to adjust the corresponding pumping force of the pump body according to the required flow rate of the electrolyte; the control module is also 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.

[0009] In an optional 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 the preset charge and discharge power, that is, The flow rate formula is: ; in, Q is the flow rate of electrolyte, in m³ / s; R is the liquid constant, unit is kg·m 2 / (s 2 ·mol·K); k 4 is the adjustment coefficient, unit is s 2 ; T 0 is the temperature of the electrolyte before the pump, in K; n is the number of electrons transferred in the reaction; M is the Faraday constant, in C / mol; c is the ion concentration in mol / m 3 ; A 1 is the effective area of ​​the electrode, in m 2 ; k 1 is the proportional constant of flow rate and mass transfer coefficient, in units of s -2 / 3 ; U is the open circuit voltage of the flow battery, in V; P is the preset charge and discharge power, in W; r is the effective ionic radius, in m; L is the conduction path length, in m; z is the ion charge number; k 2 is the Boltzmann constant, in J / K; A 2 is the ion conduction cross-sectional area, in m 2 ; or 0 It is the viscosity of the electrolyte before the pump, in kg / (m·s).

[0010] In an optional 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, The pumping force formula is set as: ; in, F 0 is the pumping force of the pump body, in N; k 3 It is a constant related to the pump and pipeline characteristics, and its unit is N / (Pa·m); A is the cross-sectional area of ​​the pipe, in m2 .

[0011] In an optional 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 to correct the pumping force of the pump body according to the viscosity of the electrolyte in the pump, that is, The viscosity formula is set as: ; in, or is the viscosity of the electrolyte in the pump, in kg / (m·s); Ea is the activation energy value, in J / mol; T is the temperature of the electrolyte in the pump, in K; Ra is the ideal gas constant, in J / (mol·K); The corrected pumping force formula is set as: ; in, F It is the pumping force of the corrected electrolyte, in N.

[0012] On the second aspect, the embodiments of the present disclosure also 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 data, so that the electrolyte is transported at a 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; and correcting the pumping force of the pump body according to the viscosity of the electrolyte in the pump.

[0013] In an optional 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; or 0 ; Obtain the temperature data of the electrolyte before the pump through the first temperature sensor T 0 ; Preset the required charging and discharging power through the control panel P .

[0014] In an optional embodiment, the method for adjusting the flow rate of the electrolyte according to the collected data and the preset charge and discharge power includes: The flow rate formula is: ; in, Q is the flow rate of electrolyte, in m³ / s; R is the liquid constant, unit is kg·m 2 / (s 2 ·mol·K); k 4 is the adjustment coefficient, unit is s 2 ; T0 is the temperature of the electrolyte before the pump, in K; n is the number of electrons transferred in the reaction; M is the Faraday constant, in C / mol; c is the ion concentration in mol / m 3 ; A 1 is the effective area of ​​the electrode, in m 2 ; k 1 is the proportional constant of flow rate and mass transfer coefficient, in units of s -2 / 3 ; U is the open circuit voltage of the flow battery, in V; P is the preset charge and discharge power, in W; r is the effective ionic radius, in m; L is the conduction path length, in m; z is the ion charge number; k 2 is the Boltzmann constant, in J / K; A 2 is the ion conduction cross-sectional area, in m 2 ; or 0 It is the viscosity of the electrolyte before the pump, in kg / (m·s).

[0015] In an optional embodiment, the method of adjusting the pumping force of the pump body according to the required flow data so that the electrolyte is transported at the required flow rate includes: The pumping force formula is set as: ; in, F 0 is the pumping force of the pump body, in N; k 3 It is a constant related to the pump and pipeline characteristics, and its unit is N / (Pa·m); A is the cross-sectional area of ​​the pipe, in m 2 .

[0016] In an optional embodiment, 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: The temperature of the electrolyte in the pump is obtained by the second temperature sensor T ; Obtain 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 or ; The viscosity of the electrolyte in the pump is obtained according to the temperature difference between the electrolyte before the pump and the electrolyte in the pump. or The methods include: The viscosity formula is set as: ; in, or is the viscosity of the electrolyte in the pump, in kg / (m·s); Ea is the activation energy value, in J / mol; T is the temperature of the electrolyte in the pump, in K; Ra is the ideal gas constant, with the unit being J / (mol·K).

[0017] In an optional embodiment, the method for correcting the pumping force of the pump body according to the viscosity of the electrolyte in the pump includes: The corrected pumping force formula is set as: ; in, F is the corrected pumping force of the electrolyte, in N.

[0018] The beneficial effect of the present invention is that the management system and working method for liquid flow batteries 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 charging and discharging power of the liquid flow battery; at the same time, when the pumping force of the pump body is adjusted, the temperature of the electrolyte will increase, thereby causing 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 and allowing the electrolyte to be transported at the required flow rate.

[0019] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0020] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, this article specifically cites preferred embodiments and provides detailed descriptions as follows in conjunction with the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A flowchart of a working method of a management system for a flow battery provided by an embodiment of the present disclosure; Figure 2A control schematic diagram of a control module provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] The liquid flow battery includes at least a pump body and an infusion tube. The electrolyte flows in the infusion tube through the operation of the pump body. As the use time goes by, 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 charging and discharging power of the liquid flow battery.

[0025] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, in the drawings, the thickness of the components may be exaggerated or reduced in order to effectively describe the technical content.

[0026] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0027] At least one embodiment provides a management system for a liquid flow battery, comprising: a pump body; a data acquisition unit, used to collect viscosity data and temperature data of the electrolyte before the pump, and to collect temperature data of the electrolyte in 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 and discharge power; wherein the control module is also configured to adjust the corresponding pumping force of the pump body according to the required flow rate of the electrolyte; the control module is also configured to obtain the viscosity of the electrolyte in the pump according to the temperature of the electrolyte in the pump, and to correct the pumping force of the pump body according to the viscosity of the electrolyte in the pump.

[0028] 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, thereby stabilizing the charging and discharging power of the flow battery; at the same time, when the pumping force of the pump body is changed, the temperature of the electrolyte will change, thereby changing the viscosity of the electrolyte in the pump, and further causing the flow rate to be different from the required one when the electrolyte is transported with the pumping force; therefore, this embodiment obtains the viscosity data of the electrolyte in the pump 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.

[0029] 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 the preset charge and discharge power, that is, The flow rate formula is: ; in, Q is the flow rate of electrolyte, in m³ / s; R is the liquid constant, unit is kg·m 2 / (s 2 ·mol·K); k 4 is the adjustment coefficient, which is obtained through multiple experiments and the unit is s 2 ; T 0 is the temperature of the electrolyte before the pump, in K; n is the number of electrons transferred in the reaction; M is the Faraday constant, in C / mol; c is the ion concentration in mol / m 3 ; A 1 is the effective area of ​​the electrode, in m 2 ; k 1 It is the proportional constant between flow rate and mass transfer coefficient, describing the effect of flow on mass transfer, and its unit is s -2 / 3 ; U is the open circuit voltage of the flow battery, in V; P is the preset charge and 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 ion charge number; k 2 is the Boltzmann constant, in J / K; A 2 is the ion conduction cross-sectional area, in m 2 ; or 0 It is the viscosity of the electrolyte before the pump, in kg / (m·s).

[0030] In this embodiment, during the operation of the flow battery, the viscosity data of the electrolyte before the pump is collected by the viscosity sensor. or 0 , and according to the preset charge and discharge power P , calculate the required electrolyte flow rate Q , then according to the required electrolyte flow Q To regulate the pumping force of the pump body.

[0031] 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, The pumping force formula is set as: ; in, F 0 is the pumping force of the pump body, in N; k 3 It is a constant related to the pump and pipeline characteristics, and its unit is N / (Pa·m); A is the cross-sectional area of ​​the pipe, in m 2 ;in, k 3 Through multiple measurements and fitting, the range is 4×10 6 N / (Pa·m) to 6×10 6 N / (Pa·m).

[0032] In this embodiment, the pumping force of the pump body and the flow rate of the electrolyte Q , viscosity of electrolyte, cross-sectional area of ​​delivery pipeline A Therefore, the pumping force of the pump body can be obtained according to the above parameters. Q When the temperature changes, the control module can deliver the electrolyte at the required flow rate by controlling the pump body to adjust the pumping force.

[0033] In some embodiments, when the pump body changes the pumping force, it will affect the temperature of the electrolyte, thereby affecting the viscosity of the electrolyte. Therefore, if the temperature is not taken into account, the pump body will change the pumping force. F 0 When delivering electrolyte, the flow rate of electrolyte Q It is not actually required and there is a certain error; therefore, the control module is also 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, The viscosity formula is set as: ; in, or is the viscosity of the electrolyte in the pump, in kg / (m·s); Ea is the activation energy value, in J / mol; T is the temperature of the electrolyte in the pump, in K; Ra is the ideal gas constant, with the unit being J / (mol·K).

[0034] The corrected pumping force formula is set as: ; in, F It is the pumping force of the corrected electrolyte, in N.

[0035] In this embodiment, when the pump body is adjusted to F 0 After the electrolyte is transported by the pumping force, the temperature data of the electrolyte in the pump is collected, and the viscosity data of the electrolyte in the pump is calculated based on the temperature data of the electrolyte in the pump. or , based on the viscosity data or To correct the existing pumping force F 0 To obtain the actual required electrolyte flow Q .

[0036] Specifically, in order to reduce 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.

[0037] like Figure 2 As shown, in some embodiments, the control module can but is not limited to using PLC, the control module is electrically connected to the first temperature sensor, the second temperature sensor, the viscosity sensor, and the pump body, and the control module regulates the operation of the pump body according to corresponding data collected by the first temperature sensor, the second temperature sensor, and the viscosity sensor.

[0038] In an alternative embodiment, the liquid constant R 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; Faraday constant M is 96485C / mol; ion concentration c 1.6×10 3 mol / m 3 ;Electrode effective area A 1 1m 2 ; Flow rate and mass transfer coefficient proportional constant k 1 1.0×10 -6 s -2 / 3 ;Open circuit voltage of flow battery U is 1.4V; the preset charge and discharge power P 98W; effective ion radius r 3.0×10 -10 m; conduction path length L 5.0×10 -3 m; ion charge number z= 1; Boltzmann constant k 2 1.38×10 -23 J / K; ion conduction cross-sectional area A 2 1m 2 ; Viscosity of electrolyte before pump or 0 1.2×10 -3 kg / (m·s); constant related to pump and pipe characteristics k 3 5×10 6 N / (Pa·m); k 4 1s 2 Activation energy value Ea is 15000 J / mol; the temperature of the electrolyte in the pump T is 301K; ideal gas constant Ra is 8.314 J / (mol⋅K); the cross-sectional area of ​​the pipe A 0.002m 2 .

[0039] According to the above parameters, the flow ,Right now Q =9.56×10 -5 m³ / s.

[0040] According to the above parameters, the pumping force ,Right now F 0 =286.8N.

[0041] According to the above parameters, the viscosity in the pump ,Right now or =1.14×10 -3 kg / (m·s).

[0042] According to the above parameters, the corrected pumping force ,Right now F =272.46N.

[0043] like Figure 1 As shown, at least one embodiment provides a working method for a management system for 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 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 based on the temperature difference; and correcting the pumping force of the pump body according to the viscosity of the electrolyte in the pump.

[0044] 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, thereby stabilizing the charging and discharging power of the flow battery. At the same time, the temperature of the electrolyte will increase when the pumping force of the pump body is adjusted, thereby causing 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 and allowing the electrolyte to be transported at a required flow rate.

[0045] 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 or 0 ; Obtain the temperature data of the electrolyte before the pump through the first temperature sensor T 0 ; Preset the required charging and discharging power through the control panel P .

[0046] 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: The flow rate formula is: ; in, Q is the flow rate of electrolyte, in m³ / s; R is the liquid constant, unit is kg·m 2 / (s 2 ·mol·K); k 4 is the adjustment coefficient, unit is s 2 ; T 0 is the temperature of the electrolyte before the pump, in K; n is the number of electrons transferred in the reaction; M is the Faraday constant, in C / mol; c is the ion concentration in mol / m 3 ; A 1 is the effective area of ​​the electrode, in m 2 ; k 1 is the proportional constant of flow rate and mass transfer coefficient, in units of s -2 / 3 ; U is the open circuit voltage of the flow battery, in V; P is the preset charge and discharge power, in W; r is the effective ionic radius, in m; L is the conduction path length, in m; z is the ion charge number; k2 is the Boltzmann constant, in J / K; A 2 is the ion conduction cross-sectional area, in m 2 ; or 0 It is the viscosity of the electrolyte before the pump, in kg / (m·s).

[0047] In this embodiment, during the operation of the flow battery, the viscosity data of the electrolyte before the pump is collected by the viscosity sensor. or 0 , and according to the preset charge and discharge power P , calculate the required electrolyte flow rate Q , then according to the required electrolyte flow Q To regulate the pumping force of the pump body.

[0048] In some embodiments, the method of adjusting the pumping force of the pump body according to the required flow data so that the electrolyte is delivered at the required flow rate includes: The pumping force formula is set as: ; in, F 0 is the pumping force of the pump body, in N; k 3 It is a constant related to the pump and pipeline characteristics and is an empirical constant obtained through multiple experiments. The unit is N / (Pa·m); A is the cross-sectional area of ​​the pipe, in m 2 .

[0049] In this embodiment, the pumping force of the pump body and the flow rate of the electrolyte Q , viscosity of electrolyte, cross-sectional area of ​​delivery pipeline A Therefore, the pumping force of the pump body can be obtained according to the above parameters. Q When the temperature changes, the control module can deliver the electrolyte at the required flow rate by controlling the pump body to adjust the pumping force.

[0050] In some embodiments, when the pump body changes the pumping force, it will affect the temperature of the electrolyte, thereby affecting the viscosity of the electrolyte. Therefore, if the temperature is not taken into account, the pump body will change the pumping force. F 0 When delivering electrolyte, the flow rate of electrolyte Q It is not actually required and 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 by a second temperature sensor T ; Obtain 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 or ; Among them, the viscosity of the electrolyte in the pump is obtained according to the temperature difference between the electrolyte before the pump and the electrolyte in the pump or The methods include: The viscosity formula is: ; in, or is the viscosity of the electrolyte in the pump, in kg / (m·s); Ea is the activation energy value, in J / mol; Ra is the ideal gas constant, in J / (mol·K); T is the temperature of the electrolyte in the pump, in K.

[0051] In some embodiments, the method of correcting the pumping force of a pump body according to the viscosity of the electrolyte in the pump includes: The corrected pumping force formula is set as: ; in, F is the corrected pumping force of the electrolyte, in N.

[0052] In this embodiment, when the pump body is adjusted to F 0 After the electrolyte is transported by the pumping force, the temperature data of the electrolyte in the pump is collected, and the viscosity data of the electrolyte in the pump is calculated based on the temperature data of the electrolyte in the pump. or , based on the viscosity data or To correct the existing pumping force F 0 To obtain the actual required electrolyte flow Q .

[0053] Specifically, in order to reduce 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.

[0054] In summary, the management system and working method for liquid flow batteries obtain the viscosity data of the electrolyte before the pump 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 charging and discharging power of the liquid flow battery; at the same time, when the pumping force of the pump body is adjusted, the temperature of the electrolyte will increase, thereby causing 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 and allowing the electrolyte to be transported at the required flow rate.

[0055] Herein, when it is mentioned that a first component is located on a second component, this may mean that the first component may be directly formed on the second component, or a third component may be interposed between the first component and the second component.

[0056] In this article, when an element or layer is referred to as being "located on," "engaged to," "connected to," "attached to," or "coupled to" another element or layer, it may be directly located on, engaged, connected, attached to, or coupled to another element or layer, or there may be intermediate elements or layers. In contrast, when an element is referred to as being "directly on," "directly engaged 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 (e.g., "between" versus "directly between," "adjacent" versus "directly adjacent," etc.). As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0057] Herein, 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.

[0058] The terms used herein are only used to describe specific exemplary configurations and are not intended to be limited. As used herein, the singular articles "one", "an" and "the" may also be intended to include plural forms, unless it is clearly indicated above that this is not the case. The terms "comprise", "include" and "have" are inclusive, and therefore specify the presence of features, steps, operations, elements and / or components, but do not exclude 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 interpreted as necessarily requiring them to be performed in the specific order discussed or shown, unless specifically identified as an execution order. Additional or alternative steps may be adopted.

[0059] As used herein, the phrases "in one embodiment," "according to one embodiment," "in some embodiments," and the like generally refer to the fact that the particular feature, structure, or characteristic following the phrase may be included in at least one embodiment of the present disclosure. Therefore, a particular feature, structure, or characteristic may be included in more than one embodiment of the present disclosure, so that these phrases do not necessarily refer to the same embodiment. As used herein, the terms "example," "exemplary," and the like are used to "serve as an example, instance, or illustration." Any implementation, aspect, or design described herein as "example" or "exemplary" is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. On the contrary, the use of the terms "example," "exemplary," and the like is intended to present concepts in a concrete manner.

[0060] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0061] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, which 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, and therefore cannot be understood as a limitation of the present invention. In addition, terms such as "first", "second" and other numerical terms do not imply an order or sequence when used in this document unless explicitly indicated above. Therefore, without departing from the teachings of the example embodiments, the first element, component, region, layer or section discussed above may be referred to as a second element, component, region, layer or section.

[0062] Spatially relative terms, such as "inside", "outside", "below", "below", "down", "above", "on", etc., may be used herein to facilitate description of the relationship of one element or feature to another element or feature as illustrated in the figure. In addition to the orientation depicted in the figure, spatially relative terms may be intended to cover different orientations of the device in use or operation. For example, if the device in the figure is turned over, the elements described as "below" or "below" other elements or features will be oriented to be "above" other elements or features. Therefore, the example term "below" can cover the orientation above and below. The device can be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein are interpreted accordingly.

[0063] In the above discussion, unless otherwise stated, the terms "about," "approximately," "substantially," etc., when used to describe a numerical value, mean a variation of + / - 10% of the value.

[0064] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of 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: include: Pump body; A data acquisition unit, used to collect the viscosity and temperature of the electrolyte before the pump, and the temperature of the electrolyte in the pump; A control module is electrically connected to the pump body and 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 and discharge power; in 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 also configured to obtain the viscosity of the electrolyte in the pump according to the temperature of the electrolyte in the pump, and to correct the pumping force of the pump body according to the viscosity of the electrolyte in the pump.

2. The management system for a flow battery according to claim 1, characterized in that: 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 the preset charge and discharge power, that is, The flow rate formula is: ; in, Q is the flow rate of electrolyte, in m³ / s; R is the liquid constant, unit is kg·m 2 / (s 2 ·mol·K); k 4 is the adjustment coefficient, unit is s 2 ; T 0 is the temperature of the electrolyte before the pump, in K; n is the number of electrons transferred in the reaction; M is the Faraday constant, in C / mol; c is the ion concentration in mol / m 3 ; A 1 is the effective area of ​​the electrode, in m 2 ; k 1 is the proportional constant of flow rate and mass transfer coefficient, in units of s -2 / 3 ; U is the open circuit voltage of the flow battery, in V; P is the preset charge and discharge power, in W; r is the effective ionic radius, in m; L is the conduction path length, in m; z is the ion 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 It is the viscosity of the electrolyte before the pump, in kg / (m·s).

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

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

5. A working method for a management system of a flow battery, characterized in that: include: Collect the viscosity and temperature of the electrolyte before the pump, and preset the charge and discharge power; Adjust the flow rate of the electrolyte according to the collected data and the preset charge and discharge power; According to the required flow data, the pumping force of the pump body is adjusted to transport the electrolyte at the required flow rate; Collect the temperature of the electrolyte in the pump, and obtain the viscosity of the electrolyte in the pump based on the temperature difference; The pumping force of the pump body is corrected according to the viscosity of the electrolyte in the pump.

6. The operating method of the management system for a flow battery according to claim 5, characterized in that: The method for collecting the viscosity and temperature of the electrolyte before the pump and presetting the charge and discharge power includes: Obtain the viscosity data of the electrolyte before the pump through the viscosity sensor η 0 ; The temperature data of the electrolyte before the pump is obtained by the first temperature sensor T 0 ; Preset the required charge and discharge power through the control panel P .

7. The operating method of the management system for a flow battery according to claim 6, characterized in that: The method for adjusting the flow rate of the electrolyte according to the collected data and the preset charge and discharge power includes: The flow rate formula is: ; in, Q is the flow rate of electrolyte, in m³ / s; R is the liquid constant, unit is kg·m 2 / (s 2 ·mol·K); k 4 is the adjustment coefficient, unit is s 2 ; T 0 is the temperature of the electrolyte before the pump, in K; n is the number of electrons transferred in the reaction; M is the Faraday constant, in C / mol; c is the ion concentration in mol / m 3 ; A 1 is the effective area of ​​the electrode, in m 2 ; k 1 is the proportional constant of flow rate and mass transfer coefficient, in units of s -2 / 3 ; U is the open circuit voltage of the flow battery, in V; P is the preset charge and discharge power, in W; r is the effective ionic radius, in m; L is the conduction path length, in m; z is the ion 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 It is the viscosity of the electrolyte before the pump, in kg / (m·s).

8. The operating method of the management system for a flow battery according to claim 7, characterized in that: The method of adjusting the pumping force of the pump body according to the required flow data so that the electrolyte is transported at the required flow rate includes: The pumping force formula is set as: ; in, F 0 is the pumping force of the pump body, in N; k 3 It is a constant related to the pump and pipeline characteristics, and its unit is N / (Pa·m); A is the cross-sectional area of ​​the pipe, in m 2 .

9. The operating method of the management system for a flow battery according to claim 8, characterized in that: The method for 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: The temperature of the electrolyte in the pump is obtained by the second temperature sensor T ; Obtain 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 ; The viscosity of the electrolyte in the pump is obtained according to the temperature difference between the electrolyte before the pump and the electrolyte in the pump. η The methods include: The viscosity formula is: ; in, η is the viscosity of the electrolyte in the pump, in kg / (m·s); Ea is the activation energy value, in J / mol; T is the temperature of the electrolyte in the pump, in K; Ra is the ideal gas constant, with the unit being J / (mol·K).

10. The operating method of the management system for a flow battery according to claim 9, characterized in that: The method for correcting the pumping force of the pump body according to the viscosity of the electrolyte in the pump comprises: The corrected pumping force formula is set as: ; in, F is the corrected pumping force of the electrolyte, in N.

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