CN217134429U - External charged state online detection device of high-temperature flow battery system - Google Patents
External charged state online detection device of high-temperature flow battery system Download PDFInfo
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- CN217134429U CN217134429U CN202123184454.3U CN202123184454U CN217134429U CN 217134429 U CN217134429 U CN 217134429U CN 202123184454 U CN202123184454 U CN 202123184454U CN 217134429 U CN217134429 U CN 217134429U
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Abstract
The utility model discloses an external SOC on-line measuring device of high temperature redox flow battery system, detection device parallelly connected set up in on the system pipeline of redox flow battery system, be used for to passing through the electrolyte SOC of system pipeline detects, detection device includes: the detection device is connected in parallel to a system pipeline of the redox flow battery system through a parallel branch, and an inlet and an outlet of the parallel branch are respectively provided with a flow regulating assembly and a control valve; the utility model discloses can realize the accuse temperature through the refrigeration effect of adjusting electrolyte flow and cooling module according to the feedback of temperature probe point, can effectively reduce the electrolyte temperature that gets into the detection battery, guarantee that the temperature can not cause the damage to the electrode, reduced the error nature that the charged state detected. After the online real-time measurement, the electrolyte flows back to the flow battery system, so that the total amount of the electrolyte in the flow battery system cannot be reduced, and the running temperature of the whole system cannot be reduced.
Description
Technical Field
The utility model belongs to the technical field of the electrochemistry energy storage, in particular to external SOC on-line measuring device of high temperature redox flow battery system.
Background
The state of charge of the battery, namely soc (state of charge), and the estimation method of the state of charge of the battery mainly includes a discharge experiment method, an open-circuit voltage method, an ampere-hour integration method, a kalman filter method, a neural network method and the like. Online real-time detection of the state of charge of a high-temperature flow battery system has been a difficult problem because the common electrode use temperature is usually less than 60 ℃, and the accuracy of potential measurement and the service life of the electrode are greatly reduced when the temperature is higher than this temperature.
In the prior art, the middle-sea energy storage technology (beijing) limited has a utility model CN212364527U "an external test flow battery state-of-charge device", the flow battery includes a battery and an electrolyte tank disposed outside the battery, the electrolyte tank and the battery are connected by a pipeline, and the pipeline is provided with an electrolyte pump; and connecting a test branch pipe on the pipeline. The utility model provides an external device of testing flow battery state of charge arranges battery external test potential value in to electrolyte, just can obtain open circuit voltage at the in-process of battery operation.
The above patent can only carry out detection conversion on the voltage of a common flow battery system, is not suitable for the potential measurement result of a high-temperature flow battery system, and the accuracy of the potential detection result is difficult to guarantee, so that the reliability of the online detection result is further reduced.
SUMMERY OF THE UTILITY MODEL
To the above problem, the utility model discloses an external SOC on-line measuring device of high temperature redox flow battery system, detection device parallelly connected set up in on the system pipeline of redox flow battery system, be used for to passing through the electrolyte SOC of system pipeline detects, detection device includes:
the detection device is connected in parallel to a system pipeline of the flow battery system through the parallel branch, and an inlet and an outlet of the parallel branch are respectively provided with a flow regulating assembly and a control valve;
the detection mechanism is arranged on the parallel branch and used for detecting and acquiring potential data and temperature data of the electrolyte passing through the parallel branch;
the temperature-controllable cooling mechanism is arranged on the parallel branch at the front end of the detection mechanism along the electrolyte conveying direction and used for receiving the temperature data fed back by the detection mechanism and adjusting the temperature and the flow of the electrolyte passing through the parallel branch.
Further, the flow battery system comprises a storage tank and a battery, and the system pipeline forms electrolyte circulation through a circulating pump arranged between the storage tank and the battery;
the system pipeline comprises an input pipe and an output pipe, the input pipe conveys electrolyte from the storage tank to the battery through the circulating pump, and the output pipe enables the electrolyte to flow back to the storage tank from the battery.
Still further, one end of the parallel branch is arranged on the input pipe at the rear end of the circulating pump, and the other end of the parallel branch is arranged on the output pipe.
Still further, the detection mechanism includes:
the detection battery is arranged on the parallel branch and used for detecting the potential of the electrolyte in the parallel branch;
and the measuring contacts of the potential detector are respectively arranged on the anode and the cathode of the detection battery and are used for acquiring potential data of the electrolyte.
Still further, the detection mechanism further comprises:
and the temperature detector is arranged on the parallel branch at the front end of the detection battery and used for detecting and outputting the temperature data of the electrolyte passing through the parallel branch.
Furthermore, the temperature detector is also electrically connected with the temperature-controllable cooling mechanism;
and when the temperature data is higher than a preset value, the temperature detector outputs a feedback signal to control the temperature-controllable cooling mechanism to reduce the real-time temperature of the electrolyte.
Still further, the temperature-controllable cooling mechanism comprises a flow regulating component;
the flow regulating assembly is electrically connected with the temperature detector.
Still further, the temperature-controllable cooling mechanism further comprises a cooling assembly;
the cooling assembly is connected with the flow regulating assembly in series, the cooling assembly is arranged on a parallel branch at the rear end of the flow regulating assembly, and the cooling assembly is electrically connected with the temperature detector.
Furthermore, a first protective gas injection and exhaust port is arranged on a parallel branch between the cooling assembly and the flow regulating assembly;
and a second protective gas injection and exhaust port is arranged on a parallel branch between the detection battery and the control valve.
Still further, the electric potential detector is electrically connected with the PC end.
The utility model discloses a detection device is provided with cooling module and flow regulation device, can realize the accuse temperature through the refrigeration effect who adjusts electrolyte flow and cooling module according to the feedback of temperature probe point, can effectively reduce the electrolyte temperature that gets into the detection battery, guarantees that the temperature can not cause the damage to the electrode, has guaranteed the accurate nature of potentiometric measurement, has reduced the error nature that the charged state detected. After the online real-time measurement, the electrolyte flows back to the flow battery system, so that the total amount of the electrolyte in the flow battery system cannot be reduced, and the running temperature of the whole system cannot be reduced.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 shows a schematic view of a combination of an external online state of charge detection device of a flow battery system according to an embodiment of the present invention.
In the drawings: 1. a storage tank; 2. a battery; 3. a protective gas injection and exhaust port; 4. a cooling assembly; 5. detecting the battery; 6. a temperature detector; 7. a potential detector; 8. a circulation pump; 9. a flow regulating assembly; 10. and (4) controlling the valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
For the on-line measuring of realization to the state of charge of high temperature redox flow battery system, the utility model provides a high temperature redox flow battery system external form state of charge on-line measuring device, detection device parallelly connected set up in on the system pipeline of redox flow battery system, be used for to passing through the electrolyte state of charge of system pipeline detects.
Before the detection device is used, electrolytes with different concentrations are prepared, the potential is measured through a standard electrode and a reference electrode or a composite electrode, a concentration-potential curve graph is drawn, and the concentration-potential curve graph is stored at a PC terminal.
In an embodiment of the present invention, referring to fig. 1, the detecting device includes a parallel branch, a detecting mechanism and a temperature-controllable cooling mechanism; the detection device is connected in parallel to a system pipeline of the redox flow battery system through a parallel branch, and an inlet and an outlet of the parallel branch are respectively provided with a flow regulating assembly 9 and a control valve 10; the detection mechanism is arranged on the parallel branch and used for detecting potential data and temperature data of the electrolyte passing through the parallel branch; the temperature-controllable cooling mechanism is serially connected with the parallel branch and arranged at the front end of the detection mechanism along the electrolyte conveying direction, receives temperature data fed back by the detection mechanism, and adjusts the temperature and flow of the electrolyte passing through the parallel branch.
The utility model discloses a detection device can realize accuse temperature through the refrigeration effect who adjusts electrolyte flow and cooling module according to the feedback of temperature probe point, can effectively reduce the electrolyte temperature that gets into the detection battery, guarantees that the electrolyte temperature can not cause the damage to the electrode that detects the battery, has guaranteed the accurate nature of potentiometric measurement, has reduced the error nature that the charged state detected. Of course, in the device, the electrolyte collected by the parallel branch is smaller than the total amount of the electrolyte flowing in the system pipeline. For example, the total amount of the electrolyte in the flow battery system is 1-100 kL, and the total amount of the electrolyte in the parallel branches of the flow battery system is 0.1L. In contrast, the ratio of the total amount of electrolyte in the parallel branches to the total amount of electrolyte in the flow battery system is less than one ten-thousandth. In addition, after online real-time measurement, the electrolyte can also flow back to the flow battery system, so that the total amount of the electrolyte in the flow battery system cannot be reduced, and the running temperature of the whole system cannot be reduced.
The flow battery system comprises a storage tank 1 and a battery 2, the system pipeline forms electrolyte circulation through a circulating pump 8 arranged between the storage tank 1 and the battery 2, the system pipeline comprises an input pipe and an output pipe, the input pipe conveys electrolyte from the storage tank 1 to the battery 2 through the circulating pump 8, and the output pipe returns the electrolyte from the battery 2 to the storage tank 1. Further, the circulating pump 8 is arranged to make the pressure in the input pipe larger than that in the output pipe, so that a pressure difference exists in the system pipeline, thereby promoting the electrolyte flow circulation inside the flow battery system.
Furthermore, one end of the parallel branch is arranged on an input pipe at the rear end of the circulating pump 8, and the other end of the parallel branch is arranged on an output pipe.
In an embodiment of the present invention, referring to fig. 1, the detection mechanism includes a detection battery 5, a potential detector 7, and a temperature detector 6; the detection battery 5 is installed on the parallel branch in series, and the detection battery 5 consists of a standard electrode and a reference electrode or a composite electrode and is used for detecting the potential of the electrolyte in the parallel branch; the potential detector 7 is used as a potential detection tool, and measuring contacts of the potential detector 7 are respectively arranged on the anode and the cathode of the detection battery 5 and are used for collecting real-time potential data of the electrolyte. The temperature detector 6 is arranged on a parallel branch at the front end of the detection battery 5 and used for detecting the real-time temperature data of the electrolyte passing through the parallel branch.
The detection battery 5 is used for carrying out potential detection on the parallel branch, potential data are collected in real time through potential detectors 7 clamped at two ends of the detection battery 5, the potential and the potential difference of the electrolyte are converted into digital signals to be displayed and recorded, and in addition, the potential detectors 7 are electrically connected with a PC (personal computer) end and transmit the digital signals to the PC end to be stored.
Referring to fig. 1, the temperature-controllable cooling mechanism includes a flow rate adjusting assembly 9 and a cooling assembly 4, the cooling assembly 4 is disposed on a parallel branch at the rear end of the flow rate adjusting assembly 9, and the cooling assembly 4 is electrically connected to the temperature detector 6; and the flow regulating assembly 9 is electrically connected with the temperature detector 6.
In the in-service use, the utility model discloses it is right cooling module 4's cooling method does not specifically prescribe a limit to, cooling module 4's cooling efficiency meet the requirements can, cooling module 4 can cool down electrolyte in real time at the flow in-process of electrolyte promptly for the electrolyte real-time temperature that temperature detector 6 gathered is less than the default. As for the specific embodiment of the cooling module 4, the air cooling, water cooling or oil cooling mode can be selected according to the field requirement. It should be noted that, in practical use, the air cooling, water cooling or oil cooling method must ensure that there is no direct contact between the cooling medium and the electrolyte, i.e. indirect cooling is adopted. The cooling medium is in direct contact with the pipe wall of the parallel branch, so that heat exchange is carried out between the cooling medium and the internal electrolyte, and the heat of the electrolyte of the high-temperature flow battery system is taken away quickly. The cooling component 4 is externally clamped on a parallel branch at the front end of the detection battery 5, and heat exchange is carried out between the external circulation of the cooling medium and the electrolyte, so that the online temperature of the electrolyte is smaller than a preset value.
In an embodiment of the present invention, a first protection gas injection and exhaust port is disposed on the parallel branch between the cooling module 4 and the flow regulating module 9; and a second protective gas injection and exhaust port is arranged on a parallel branch between the detection battery 5 and the control valve 10. When the protective gas injection and exhaust port is used, the protective gas is injected through the protective gas injection and exhaust port, oxygen in the parallel branch pipeline is exhausted, and electrolyte in the system pipeline is pushed to flow in the parallel branch through the pressure difference between the input pipe and the output pipe, so that the condition that the electrolyte in the parallel branch is oxidized in the flowing process is avoided.
Wherein, the gas vent 3 is annotated to the protective gas includes that first protective gas annotates the gas vent and the gas vent is annotated to the second protective gas, and one of them is used for infusing the protective gas, and the other one is used for the residual gas in the exhaust pipe, avoids remaining oxygen in the parallel branch road when carrying out the potential detection, and electrolyte and oxygen contact for electrolyte takes place the condition emergence that goes bad.
The utility model discloses an in the use, at first set up the default to the target temperature, then through the temperature data who sets up the temperature detector 6 real-time acquisition electrolyte between cooling module 4 and detection battery 5 to compare real-time temperature data and default, if real-time temperature data is higher than when the default, 6 output feedback signals of temperature detector, feed back feedback signals to flow control subassembly 9 and cooling module 4, through adjusting flow control subassembly 9 and cooling module 4, reduce the electrolyte real-time temperature in the branch road that connects in parallel. If the real-time temperature data is lower than the preset value, the temperature-controllable cold area unit is not adjusted, and the detection mechanism can directly detect the electrolyte. Of course, the default can be set for as required the utility model discloses in, because common electrode uses and requires usually that the electrolyte temperature is less than 60 degrees centigrade, be higher than this temperature can greatly reduced potential measurement's precision and the life-span of electrode, can be decided to 60 degrees centigrade with the default for this. The cooling component 4 can be a pump or a cooling fan, and the pump or the cooling fan increases or decreases the flow rate or the blast volume of the cooling liquid according to the temperature of the electrolyte in the system, so that the function of adjusting the refrigeration effect is realized. Temperature data is fed back to the flow regulating assembly 9, the flow regulating assembly 9 can be an electric valve, and the opening of the electric valve is regulated according to a temperature feedback result, so that the flow of electrolyte in the system is changed, and the function of regulating the refrigeration effect is realized.
Further, the specific way of feeding back the feedback signal to the flow rate adjusting assembly 9 and the cooling assembly 4 to adjust the flow rate adjusting assembly 9 and the cooling assembly 4 includes:
in the first mode, the opening degree of the flow regulating assembly 9 is reduced, so that the flow of the parallel branch is changed, and the cooling effect of the cooling assembly 4 is improved;
in the second mode, the cooling effect of the cooling module 4 is improved by increasing the flow rate of the cooling medium of the cooling module 4 or reducing the temperature of the cooling medium;
in the third mode, the flow rate adjusting assembly 9 and the cooling assembly 4 are adjusted by combining the first mode and the second mode, so that the cooling efficiency is improved.
The utility model discloses an in the embodiment, when the electrolyte after the cooling flows through detection battery 5, measure the real-time electrolyte potential of gathering through current potential detector 7, current potential data communication transmits to the PC end. And comparing the potential data with a concentration-potential curve chart drawn in the early stage at the PC terminal to obtain the corresponding concentration of the electrolyte, and converting the current charge state of the flow battery system according to the concentration of the electrolyte.
Although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. The utility model provides an external SOC on-line measuring device of high temperature flow battery system, detection device parallelly connected set up in on the system pipeline of flow battery system for to passing through the electrolyte SOC of system pipeline detects, its characterized in that, detection device includes:
the detection device is connected in parallel to a system pipeline of the flow battery system through the parallel branch, and an inlet and an outlet of the parallel branch are respectively provided with a flow regulating assembly (9) and a control valve (10);
the detection mechanism is arranged on the parallel branch and used for detecting and acquiring potential data and temperature data of the electrolyte passing through the parallel branch;
the temperature-controllable cooling mechanism is arranged on the parallel branch at the front end of the detection mechanism along the electrolyte conveying direction and used for receiving the temperature data fed back by the detection mechanism and adjusting the temperature and the flow of the electrolyte passing through the parallel branch.
2. The detection device according to claim 1, wherein the flow battery system comprises a storage tank (1) and a battery (2), and the system pipeline forms electrolyte circulation through a circulation pump (8) arranged between the storage tank (1) and the battery (2);
the system pipeline comprises an input pipe and an output pipe, the input pipe conveys electrolyte from the storage tank (1) to the battery (2) through the circulating pump (8), and the output pipe enables the electrolyte to flow back to the storage tank (1) from the battery (2).
3. The device according to claim 2, characterized in that one end of the parallel branch is arranged on the inlet pipe at the rear end of the circulation pump (8) and the other end is arranged on the outlet pipe.
4. The detection device according to any one of claims 1 to 3, wherein the detection mechanism comprises:
the detection battery (5) is arranged on the parallel branch and used for detecting the potential of the electrolyte in the parallel branch;
and the measuring contacts of the potential detector (7) are respectively arranged at the anode and the cathode of the detection battery (5) and are used for acquiring potential data of the electrolyte.
5. The sensing device of claim 4, wherein the sensing mechanism further comprises:
and the temperature detector (6) is arranged on the parallel branch at the front end of the detection battery (5) and is used for detecting and outputting temperature data of the electrolyte passing through the parallel branch.
6. The detection device according to claim 5, wherein the temperature detector (6) is further electrically connected with the temperature-controllable cooling mechanism;
and when the temperature data is higher than a preset value, the temperature detector (6) outputs a feedback signal to control the temperature-controllable cooling mechanism to reduce the real-time temperature of the electrolyte.
7. The detection device according to claim 5, characterized in that the temperature-controllable cooling means comprise a flow-regulating assembly (9);
the flow regulating assembly (9) is electrically connected with the temperature detector (6).
8. The detection device according to claim 7, wherein the temperature-controllable cooling mechanism further comprises a cooling assembly (4);
the cooling assembly (4) is connected with the flow regulating assembly (9) in series, the cooling assembly (4) is arranged on a parallel branch at the rear end of the flow regulating assembly (9), and the cooling assembly (4) is electrically connected with the temperature detector (6).
9. The detection device according to claim 8, wherein a first protective gas injection and exhaust port is arranged on a parallel branch between the cooling assembly (4) and the flow regulating assembly (9);
and a second protective gas injection and exhaust port is arranged on a parallel branch between the detection battery (5) and the control valve (10).
10. The detecting device according to claim 4, characterized in that the potential detecting instrument (7) is electrically connected to the PC terminal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202123184454.3U CN217134429U (en) | 2021-12-17 | 2021-12-17 | External charged state online detection device of high-temperature flow battery system |
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| CN202123184454.3U CN217134429U (en) | 2021-12-17 | 2021-12-17 | External charged state online detection device of high-temperature flow battery system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115763885A (en) * | 2022-12-21 | 2023-03-07 | 寰泰储能科技股份有限公司 | Flow battery system, control method and device thereof and electronic equipment |
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2021
- 2021-12-17 CN CN202123184454.3U patent/CN217134429U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115763885A (en) * | 2022-12-21 | 2023-03-07 | 寰泰储能科技股份有限公司 | Flow battery system, control method and device thereof and electronic equipment |
| CN115763885B (en) * | 2022-12-21 | 2023-10-24 | 寰泰储能科技股份有限公司 | Flow battery system, control method thereof and electronic equipment |
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