CN201435423Y - All vanadium redox flow battery system for communication - Google Patents

Abstract

An all-vanadium redox flow battery system for communication replaces traditional lead-acid batteries. In addition to the battery stack, the system is also equipped with a liquid storage tank, a circulation pump, a temperature control system and a controller. The working process is that the circulation pump draws the positive electrolyte from the liquid storage tank, injects it into the battery stack through the valve, implements the ion exchange of the electrolyte in the battery stack, and enters the temperature control system after completing the charging and discharging work to keep the temperature of the electrolyte. Between 0 and 45°C, then return to the positive electrode storage tank. The working process of the negative electrode electrolyte is the same as that of the positive electrode. The circulation pump and battery stack adopt redundant technology to improve the reliability of the power supply system. The temperature control system is composed of an electrolyte heat exchanger and a semiconductor cooling component, through which the semiconductor cooling component is forwardly or reversely energized to cool or heat the electrolyte. Because the system works reliably, has a long service life, allows overcharging and overdischarging, no acid mist leakage, and waste disposal does not pollute the environment, it is worthy of popularization and application in communication systems.

Description

All vanadium redox flow battery system for communication

Technical field

The utility model relates to an all-vanadium liquid flow battery system for communication, which can be used in the field of communication as a backup power supply to replace the currently used lead-acid battery pack, and belongs to the technical field of batteries.

Background technique

In order to ensure the safe and reliable operation of the communication network, the power supply system in the communication system is required to have high reliability. For this reason, a backup power supply is equipped to prevent communication interruption caused by the AC mains power failure. The backup power in the current communication system adopts the lead-acid battery pack.

When the AC mains power fails, the backup power supply supplies power to the communication host to maintain the normal operation of the communication network; when the AC mains returns to normal, the rectifier supplies power to the communication host and at the same time charges the backup power-battery pack.

Usually, the charge and discharge life of a lead-acid battery is about 1200 times. If it is charged and discharged once a day, it can be used for about three years. Due to insufficient power supply, many areas have power cuts many times a day due to power cuts, especially during peak power consumption hours. Frequently, the battery life of many communication systems is less than 2 years. However, communication operators require battery life to be at least 5 years, which is difficult for battery manufacturers to guarantee. In communication systems, lead-acid batteries have the highest total cost due to their short life and high maintenance requirements.

Lead-acid batteries are not allowed to be deeply discharged. Once over-discharged, lead sulfate will be formed inside the lead-acid battery, and the battery will soon be scrapped due to failure. At the same time, often due to insufficient charging, the internal vulcanization of the lead-acid battery will also be caused and the battery will be scrapped ahead of time. Therefore, in order to improve the service life of lead-acid battery packs, correct operation procedures must be implemented, but it is often difficult for operation managers to do so. For this reason, communication operators and lead-acid battery manufacturers have been studying the current capacity of the battery and the prediction of the discharge time. However, due to the complex electrochemical reactions of lead-acid batteries, this prediction error is very large, which often misleads users and is counterproductive. .

The lead-acid battery pack is in a floating charge state when the mains power supply is normal. Due to the internal self-discharge phenomenon of the lead-acid battery, the actual capacity of the battery often decreases continuously, resulting in a greatly reduced battery discharge time when the mains power is cut off, which cannot meet the backup time requirements of the communication system.

The current communication system uses a large amount of lead-acid batteries, and a large number of them need to be scrapped every 3 to 5 years. How to carry out environmental protection treatment of these waste batteries is also a problem facing environmental protection.

As far as the current technical level is concerned, it is still impossible to overcome the above-mentioned shortcomings of lead-acid batteries. Therefore, although it is not ideal for communication systems to use lead-acid batteries as backup power, it is also a last resort at present.

Contents of the invention

In order to overcome a series of shortcomings in the use of lead-acid battery packs as backup power sources in communication systems, the utility model provides an all-vanadium redox flow battery system for communication, which has high energy conversion efficiency, reliable operation, and long service life , allow overcharge and overdischarge, no acid mist leakage, battery waste disposal does not pollute the environment, etc., can replace the traditional lead-acid battery pack for communication.

The technical scheme that the utility model solves its technical problem adopts is:

1. The all-vanadium redox flow battery is used to replace the lead-acid battery pack traditionally used in the backup power supply of the communication system. The all-vanadium redox flow battery uses liquid electrolyte as the active material for battery stack energy storage. The electrolyte allows long-term storage and recycling without deterioration. There is no such thing as a solid-phase material that is involved in the electrode reaction of traditional lead-acid batteries. Another kind of conversion of solid-phase substances, if the charging and discharging operation is not standardized, overcharging and over-discharging occur, the lead-acid battery may damage the battery stack, reduce the service life and other adverse phenomena. All-vanadium redox flow batteries have advantages over lead-acid batteries in principle.

2. In order to realize the normal operation of the all-vanadium redox flow battery system and build a working platform, in addition to the battery stack, positive and negative electrolyte liquid storage tanks, positive and negative electrolyte circulation pumps, temperature control systems and controllers, etc. need to be configured. The working process of the battery system is: the positive electrode circulation pump pumps out the positive electrode electrolyte stored in the positive electrode liquid storage tank, injects it into the battery stack through a series of valves, implements ion exchange of the electrolyte in the battery stack, and completes the charging and discharging work. Enter the temperature control system to keep the electrolyte within the optimum working temperature range, and then return to the positive storage tank. The working process of the negative electrode is the same as that of the positive electrode.

The invention is an all-vanadium redox flow battery system for communication, which is characterized in that: the positive electrolyte liquid storage tank (1) is respectively connected to the positive electrolyte circulation pump (5) and the inlet end of the positive electrolyte circulation pump (6) , the outlets of the positive electrode electrolyte circulation pump (5) and the positive electrode electrolyte circulation pump (6) are respectively connected with the positive electrode electrolyte check valve (17) and the positive electrode electrolyte check valve (18), and the positive electrode electrolyte check valve ( 17) The other end of the positive electrode electrolyte check valve (18) is connected to the inlet of the valve (37) and the valve (38) respectively, and the outlet of the valve (37) and the valve (38) are combined and respectively connected to the valve (39) ) is connected to one end of the valve (47), and the other end of the valve (39) and the valve (47) is connected to the A side inlet of the all-vanadium redox flow battery stack (3) and the all-vanadium redox flow battery stack (4), two The A-side outlets of the all-vanadium redox flow battery stack (3) and the all-vanadium redox flow battery stack (4) are connected to the valve (41) and the valve (49), and after the valve (41) and the other end of the valve (49) are combined together It is connected with the inlet of the valve (43) and the valve (44), the other end of the valve (43) is connected with the inlet of the positive electrolyte heat exchanger (13), the outlet of the valve (44) is connected with the outlet of the positive electrolyte heat exchanger (13) After being connected, it is directly discharged into the positive electrode electrolyte liquid storage tank (1), forming a positive electrode electrolyte circulation loop; the negative electrode electrolyte liquid storage tank (2) is connected with the negative electrode electrolyte circulation pump (7) and the negative electrode electrolyte circulation pump ( 8) is connected to the inlet port, and the outlets of the negative electrode electrolyte circulation pump (7) and the negative electrode electrolyte circulation pump (8) are respectively connected with the negative electrode electrolyte check valve (19) and the negative electrode electrolyte check valve (20). The other end of the electrolyte check valve (19) and the negative electrode electrolyte check valve (20) are respectively connected to the inlets of the valve (45) and the valve (46), and the outlets of the valve (45) and the valve (46) are combined Respectively connected to the valve (40) and one end of the valve (48), the other end of the valve (40) and the valve (48) is connected to the B of the all-vanadium redox flow battery stack (3) and the all-vanadium redox flow battery stack (4). The side inlets are connected, the B-side outlets of the two all-vanadium redox flow battery stacks (3) and the all-vanadium redox flow battery stack (4) are connected with the valve (42) and the valve (50), and the valve (42) is connected with the valve (50) The other end is connected with the inlet of the valve (51) and the valve (52) after being put together, the other end of the valve (51) is connected with the inlet of the negative electrode electrolyte heat exchanger (14), and the outlet of the valve (52) exchanges heat with the positive electrode electrolyte After the outlet of the device (14) is connected, it is directly discharged into the negative electrode electrolyte liquid storage tank (2), forming a negative electrode electrolyte circulation loop.

3. The electrolyte of the all-vanadium redox flow battery needs to be kept within the temperature range of 0-45°C to prevent the precipitation or precipitation of the electrolyte, which will affect the normal operation of the all-vanadium redox flow battery. Therefore, a temperature control system is configured in the system, which consists of an electrolyte heat exchanger and a semiconductor refrigeration component. The cooling or heating of the electrolyte is realized by using the forward or reverse electricity of the semiconductor refrigeration component, and the heat exchange is carried out in the electrolyte heat exchanger. When the temperature of the electrolyte is lower than the lower limit temperature, the controller controls the semiconductor refrigeration component to conduct reverse electricity as a heater to heat the system; when the temperature is higher than the upper limit temperature, the controller controls the semiconductor refrigerator component to forward electricity as a heater The cooler cools the system; it can be used in regions with different climatic conditions and in different environmental conditions.

The temperature control technical scheme is: both sides of the positive electrode electrolyte heat exchanger (13) are affixed with semiconductor refrigeration components (33), and the DC power output by the switching power supply (35) supplies power to the semiconductor refrigeration components (33). The cathode electrolyte heat exchanger fan (15) is installed below the semiconductor refrigeration assembly (33), and the semiconductor refrigeration assembly (33) is energized forwardly or reversely to determine whether the semiconductor refrigeration assembly (33) is in cooling mode or heating Working condition, this control is realized by the controller (26) controlling the relay (31) through the wire (61), and the positive electrode electrolyte heat exchanger (13) passes the positive electrode electrolyte heat exchanger fan (15) and semiconductor The cold assembly (33) implements temperature control of the positive electrode electrolyte together; both sides of the negative electrode electrolyte heat exchanger (14) are all pasted with a semiconductor cooling assembly (34), and the DC power output by the switching power supply (35) is used to cool the semiconductor. Component (34) supplies power, negative electrode electrolyte heat exchanger fan (16) is installed below semiconductor refrigeration assembly (34), determines semiconductor refrigeration assembly (34) to semiconductor refrigeration assembly (34) forward energization or reverse energization ) is in the cooling mode or the heating mode, this control is realized by the controller (26) controlling the relay (32) through the wire (67), and the negative electrode electrolyte heat exchanger (14) passes through the negative electrode electrolyte heat exchanger The fan (16) and the semiconductor cooling assembly (34) implement temperature control of the negative electrode electrolyte together.

4. The credit DC power supply system requires reliable operation and uninterrupted power supply to ensure smooth communication. For this reason, redundant technology is adopted in this all-vanadium redox flow battery system, and some key components such as electrolyte circulation pump and battery stack are backed up. When a component fails, it will be switched immediately to ensure continuous operation of the system.

The system redundancy technical solution is: the positive electrode electrolyte circulation pump (5) and the positive electrode electrolyte circulation pump (6) are respectively driven by the positive electrode electrolyte circulation pump motor (9) and the positive electrode electrolyte circulation pump motor (10). backup, their start, stop and failover are all controlled and implemented by the controller (26) through the wires (54) and wires (55); the negative electrode electrolyte circulation pump (7) and the negative electrode electrolyte circulation pump (8) are controlled by Negative electrode electrolyte circulation pump motor (11) and negative electrode electrolyte circulation pump motor (12) are driven, they are mutual backup, their start, stop and failover are all controlled by controller (26) through wire (58) and wire (59) ) to control implementation.

5. Realize the normal charging and discharging of the battery stack and ensure the reliable power supply of the system. A controller is also equipped in the all-vanadium redox flow battery system. Its functions are as follows:

1) Control the charging and discharging process of the battery stack

2) According to the climate and environmental conditions and the working state of the battery stack, control the temperature of the electrolyte, and implement heating or cooling of the temperature control system

3) Control the start and stop of the electrolyte circulating pump

4) Measure parameters such as the working status and alarm status of the energy storage system, and display and alarm

5) Realize remote telemetry, remote signaling, remote control and remote adjustment

The system control technical scheme is: a positive electrode electrolyte liquid storage tank level gauge (21) and a positive electrode electrolyte liquid storage tank temperature sensor (23) are respectively installed on the positive electrode electrolyte liquid storage tank (1), and their output signals pass through Wire (68) and wire (53) pass to controller (26) to realize display and control; On negative electrode electrolyte liquid storage tank (2), positive electrode electrolyte liquid storage tank liquid level gauge (22) and positive electrode liquid storage tank (22) are respectively installed. Electrolyte liquid storage tank temperature sensor (24), their output signal is sent to controller (26) by wire (69) and wire (57) to realize display and control.

6. The all-vanadium redox flow battery system adopts a modular design, and the entire system is designed in the form of a cabinet. Its footprint is smaller than or equal to that of a lead-acid battery pack of the same capacity, which is convenient for installation, transportation and maintenance.

The beneficial effects of the utility model are:

1. The all-vanadium redox flow battery system is used as the backup power supply of the communication system, which has a long service life and reduces the power supply and operation cost of the communication system;

2. There is no leakage of acid mist from lead-acid batteries and environmental protection treatment of waste lead-acid batteries;

3. It can be deeply discharged, overcharged and undercharged without causing irreversible damage to the all-vanadium redox flow battery;

4. The all-vanadium redox flow battery system adopts redundant technology, and adopts backup for important key components, so that the work reliability is higher and the reliability of the communication system is further strengthened;

5. The all-vanadium redox flow battery system has a high degree of automation and simple operation and management.

Description of drawings

Below in conjunction with accompanying drawing, the utility model is further described.

Figure 1 is a schematic diagram of the principle of an all-vanadium redox flow battery system for communication.

In Figure 1:

1. Positive electrolyte storage tank 2. Negative electrolyte storage tank

3. All vanadium redox flow battery stack 4. All vanadium redox flow battery stack (backup)

5. Positive electrolyte circulation pump 6. Positive electrolyte circulation pump (backup)

7. Negative electrolyte circulation pump 8. Negative electrolyte circulation pump (backup)

9. Positive electrolyte circulation pump motor 10. Positive electrolyte circulation pump motor (backup)

11. Negative electrolyte circulation pump motor 12. Negative electrolyte circulation pump motor (backup)

13. Positive electrolyte heat exchanger 14. Negative electrolyte heat exchanger

15. Positive electrolyte heat exchanger fan 16. Negative electrolyte heat exchanger fan

17. Positive electrolyte check valve 18. Positive electrolyte check valve (backup)

19. Negative electrolyte check valve 20. Negative electrolyte check valve (backup)

21. Positive electrode electrolyte liquid storage tank level gauge 22. Negative electrode electrolyte liquid storage tank level gauge

23. Positive electrolyte liquid storage tank temperature sensor 24. Negative electrode electrolyte liquid storage tank temperature sensor

25. Room temperature sensor 26. Controller

27. Load 28. Current sensor

29. Voltage sensor 30. Contactor

31. Relay (positive side) 32. Relay (negative side)

33. Semiconductor cooling components (positive side) 34. Semiconductor cooling components (negative side)

35. Switching power supply 36. Rectifier

37. Valve 38. Valve

39. Valve 40. Valve

41. Valve 42. Valve

43. Valve 44. Valve

45. Valve 46. Valve

47. Valve 48. Valve

49. Valve 50. Valve

51. Valve 52. Valve

53. Control line 54. Control line

55. Control line 56. Control line

57. Control line 58. Control line

59. Control line 60. Control line

61. Control line 62. Control line

63. Control line 64. Control line

65. Control line 66. Control line

67. Control line 68. Control line

69. Control line

Detailed ways

Referring to Fig. 1, the positive electrode electrolyte liquid storage tank (1) is connected to the inlet end of the positive electrode electrolyte circulation pump (5) and the positive electrode electrolyte circulation pump (6) respectively, and the positive electrode electrolyte circulation pump (5) and the positive electrode electrolyte circulation The outlet of the pump (6) is connected to the positive electrode electrolyte check valve (17) and the positive electrode electrolyte check valve (18) respectively, and the positive electrode electrolyte check valve (17) is connected to the other end of the positive electrode electrolyte check valve (18). One end is connected to the inlet of valve (37) and valve (38) respectively, and the outlet of valve (37) and valve (38) is combined and connected with valve (39) and valve (47) one end respectively, and its valve (39) The other end of the valve (47) is connected to the A-side inlet of the all-vanadium redox flow battery stack (3) and the all-vanadium redox flow battery stack (4), and the two all-vanadium redox flow battery stacks (3) and the all-vanadium redox flow battery The A-side outlet of the battery stack (4) is connected with the valve (41) and the valve (49), and the valve (41) is connected with the valve (43) and the inlet of the valve (44) after the valve (41) is combined with the other end of the valve (49). (43) The other end is connected to the inlet of the positive electrode electrolyte heat exchanger (13), and the outlet of the valve (44) is directly discharged into the positive electrode electrolyte liquid storage tank (1) after being connected with the outlet of the positive electrode electrolyte heat exchanger (13). wherein, a positive electrolyte circulation loop is formed; the positive electrolyte circulation pump (5) and the positive electrolyte circulation pump (6) are respectively driven by the positive electrolyte circulation pump motor (9) and the positive electrolyte circulation pump motor (10); Both sides of the positive electrode electrolyte heat exchanger (13) are affixed with semiconductor refrigeration components (33), and the forward or reverse energization of the refrigeration components determines whether the semiconductor refrigerator components are in cooling or heating conditions. , this control is accomplished by relay (31); positive electrode electrolyte heat exchanger fan (15) implements the temperature control of positive electrode electrolyte together with semiconductor cooling assembly (33); in positive electrode electrolyte liquid storage tank (1 ) respectively install the liquid level gauge (21) of the positive electrode electrolyte liquid storage tank and the temperature sensor (23) of the positive electrode electrolyte liquid storage tank.

The negative electrode electrolyte liquid storage tank (2) is connected to the inlet end of the negative electrode electrolyte circulation pump (7) and the negative electrode electrolyte circulation pump (8) respectively, and the negative electrode electrolyte circulation pump (7) and the negative electrode electrolyte circulation pump (8) The outlet of the negative electrode electrolyte check valve (19) and the negative electrode electrolyte check valve (20) link to each other respectively, and the other end of the negative electrode electrolyte check valve (19) and the negative electrode electrolyte check valve (20) are respectively connected to The inlet of valve (45) and valve (46), the outlet of valve (45) and valve (46) are connected together with valve (40) and valve (48) one end respectively, its valve (40) and valve (48) ) is connected to the B-side inlet of the all-vanadium redox flow battery stack (3) and the all-vanadium redox flow battery stack (4), and the two all-vanadium redox flow battery stacks (3) and the all-vanadium redox flow battery stack (4 ) is connected to the valve (42) with the valve (50), and the valve (42) is connected with the valve (51) and the valve (52) inlet after the other end of the valve (50) is combined, and the valve (51) is another One end is connected with the inlet of the negative electrode electrolyte heat exchanger (14), and the outlet of the valve (52) is directly discharged into the negative electrode electrolyte liquid storage tank (2) after being connected with the outlet of the positive electrode electrolyte heat exchanger (14), forming a Negative electrode electrolyte circulation circuit; the negative electrode electrolyte circulation pump (7) and the negative electrode electrolyte circulation pump (8) are respectively driven by the negative electrode electrolyte circulation pump motor (11) and the negative electrode electrolyte circulation pump motor (12); Both sides of the exchanger (14) are affixed with a semiconductor refrigeration assembly (34). Whether the forward or reverse energization of the refrigeration assembly determines whether the semiconductor refrigerator assembly is in a cooling condition or a heating condition, this control is Completed by relay (32); negative electrode electrolyte heat exchanger (14) implements the temperature control of negative electrode electrolyte together with semiconductor cooling assembly (34) by negative electrode electrolyte heat exchanger fan (16); The liquid storage tank (2) is respectively equipped with a negative electrode electrolyte liquid storage tank liquid level gauge (22) and a negative electrode electrolyte liquid storage tank temperature sensor (24).

The two positive poles and two negative poles of the all-vanadium redox flow battery stack (3) and the all-vanadium redox flow battery stack (4) are respectively connected in parallel with wires, a current sensor (28) is connected in series on the negative pole connecting wire, and a voltage is connected in parallel between the positive pole and the negative pole. The sensor (29); the positive and negative connecting wires are respectively connected to the rectifier (36) and the load (27), forming an electric charging and discharging circuit of the all-vanadium redox flow battery.

The switching power supply (35) is actually a DC-DC converter, which converts the DC voltage of the all-vanadium redox flow battery stack (3) and the all-vanadium redox flow battery stack (4) into a DC 24V. The input terminal of the switching power supply (35) is connected with the positive and negative poles of the rectifier (36), and its output terminal is connected with the relay (31) and the relay (32) respectively.

Room temperature sensor (25) is the usefulness of measuring the temperature in the cabinet.

Controller (26) is respectively with lead (53), lead (54), lead (55), lead (56), lead (57), lead (58), lead (59), lead (60), lead (61) ), wires (62), wires (63), wires (64), wires (65), wires (66), wires (67), wires (68 ), wires ( 69 ) and positive electrolyte liquid storage tank temperature sensor (23), positive electrode electrolyte circulation pump motor (9), positive electrode electrolyte circulation pump motor (10), positive electrode electrolyte heat exchanger fan (15), negative electrode electrolyte liquid storage tank temperature sensor (24), negative electrode electrolyte Circulation pump motor (11), negative electrode electrolyte circulation pump motor (12), negative electrode electrolyte heat exchanger fan (16), relay (31), voltage sensor (29), current sensor (28), relay (32), The room temperature sensor (25) is electrically connected to form an electrical control loop.

The working principle of the system will be described in two working conditions of charging and discharging of the all-vanadium redox flow battery system.

Charging condition:

When the commercial power is in the normal power supply state, under the control of the controller (26), the contactor (30) is closed, so that the rectifier (36) outputs DC power to supply power to the load (27), and at the same time, the controller (26) ) to make the all-vanadium redox flow battery system under the charge state. First, the positive electrode electrolyte circulation pump motor (9) is powered on to run, drives the positive electrode electrolyte circulation pump (5), and draws the positive electrode electrolyte from the positive electrode electrolyte liquid storage tank (1), and passes through the positive electrode electrolyte one-way valve ( 17) and valve (37), valve (39) and valve (47) inject electrolytic solution into the A side of all vanadium redox flow battery stack (3) and all vanadium redox flow battery stack (4); Carry out simultaneously with this process Yes, the negative electrode electrolyte circulation pump motor (11) is powered on to run, drives the negative electrode electrolyte circulation pump (7), and draws the negative electrode electrolyte from the negative electrode electrolyte liquid storage tank (2), and passes through the negative electrode electrolyte check valve ( 19), the valve (45), the valve (48) and the valve (40) inject the electrolyte solution into the B side of the all-vanadium redox flow battery stack (3) and the all-vanadium redox flow battery stack (4); if the all-vanadium redox flow battery The positive and negative poles of the stack are in a charged state, and at this time, the following electrochemical reactions take place in the all-vanadium redox flow battery stack (3) and the all-vanadium redox flow battery stack (4): the activity in the electrolyte on the A side (positive end) Substance V+4 ion acquires positive charge to become V+5 ion, and H+ passes through the proton exchange membrane to make the active substance V ⁺³ ion in the electrolyte on the B side (negative end) become V ⁺² ion by obtaining electrons; At the same time, the electric energy is stored in the electrolyte in the charging circuit. At this time, the potential difference between the positive and negative electrodes increases. With the progress of the charging process, the potential difference further increases. Under the control of the charging process will be transferred to the float charge state.

Discharge conditions:

When the mains power fails, the contactor (30) will open automatically due to power failure, so that the rectifier (36) will have no DC power output. At this time, the all-vanadium redox flow battery stack (3) and the all-vanadium redox flow battery stack (4) Immediately supply power to the load (27); meanwhile, under the control of the controller (26), the positive electrode electrolyte circulation pump (5) and the negative electrode electrolyte circulation pump (7) are in the positive electrode electrolyte circulation pump motor (9) and the negative electrode electrolysis Driven by the liquid circulation pump motor (11), it immediately goes into work; the electrolyte circulation process is exactly the same as the charging process cycle, but the electrochemical reactions in the all-vanadium redox flow battery stack are different. The active material V ⁺⁵ ions in the electrolyte gain electrons to become V ⁺⁴ ions, and the active material V ⁺² ions in the B side (negative end) electrolyte lose electrons to become V ⁺³ ions. The inside of the battery forms a discharge circuit through H+ conduction, releases the electric energy stored in the active material in the electrolyte, and outputs electric energy to the load (27); at this time, the potential difference between the positive and negative electrodes decreases, and as the discharge process progresses, the potential The difference further decreases, and when it reaches the specified value, the discharge process will stop; generally speaking, the capacity design of the battery pack is to ensure that the battery pack discharge time is longer than the mains interruption time, only in this way can the uninterrupted operation of the communication system be guaranteed; When electricity comes in, under the control of the controller (26), the system immediately enters the charging state, and the all-vanadium redox flow battery system stops supplying power to the load.

Claims (4)

1. An all-vanadium redox flow battery system for communication, characterized in that: the positive electrode electrolyte liquid storage tank (1) is connected to the inlet end of the positive electrode electrolyte circulation pump (5) and the positive electrode electrolyte circulation pump (6) respectively, The outlets of the positive electrode electrolyte circulation pump (5) and the positive electrode electrolyte circulation pump (6) are respectively connected with the positive electrode electrolyte check valve (17) and the positive electrode electrolyte check valve (18), and the positive electrode electrolyte check valve (17 ) and the other end of the positive electrolyte check valve (18) are respectively connected to the inlet of the valve (37) and the valve (38), and the outlet of the valve (37) and the valve (38) are combined together and respectively connected to the valve (39) One end of the valve (47) is connected, and the valve (39) and the other end of the valve (47) are connected with the A-side inlet of the all-vanadium redox flow battery stack (3) and the all-vanadium redox flow battery stack (4). The A-side outlets of the vanadium redox flow battery stack (3) and the all-vanadium redox flow battery stack (4) are connected to the valve (41) and the valve (49), and the valve (41) and the other end of the valve (49) are combined together and connected to the valve (49). The valve (43) is connected to the inlet of the valve (44), the other end of the valve (43) is connected to the inlet of the positive electrolyte heat exchanger (13), and the outlet of the valve (44) is connected to the outlet of the positive electrolyte heat exchanger (13) After that, it is directly discharged into the positive electrode electrolyte liquid storage tank (1), forming a positive electrode electrolyte circulation loop; the negative electrode electrolyte liquid storage tank (2) is connected with the negative electrode electrolyte circulation pump (7) and the negative electrode electrolyte circulation pump (8) respectively. ), the outlets of the negative electrode electrolyte circulation pump (7) and the negative electrode electrolyte circulation pump (8) are respectively connected with the negative electrode electrolyte check valve (19) and the negative electrode electrolyte check valve (20). The other end of the liquid check valve (19) and the negative electrode electrolyte check valve (20) are respectively connected to the inlet of the valve (45) and the valve (46), and after the outlet of the valve (45) and the valve (46) are combined Connect to one end of the valve (40) and the valve (48) respectively, and the other end of the valve (40) and the valve (48) are connected to the B side of the all-vanadium redox flow battery stack (3) and the all-vanadium redox flow battery stack (4) The inlets are connected, the B-side outlets of the two all-vanadium redox flow battery stacks (3) and the all-vanadium redox flow battery stack (4) are connected with the valve (42) and the valve (50), and the valve (42) is connected with the valve (50) One end is connected with the inlet of valve (51) and valve (52) after being put together, the other end of valve (51) is connected with the inlet of negative electrode electrolyte heat exchanger (14), and the outlet of valve (52) is connected with positive electrode electrolyte heat exchanger The outlet of (14) is directly discharged into the negative electrode electrolyte liquid storage tank (2) after being connected, forming a negative electrode electrolyte circulation loop. 2. The communication all-vanadium redox flow battery system according to claim 1, characterized in that: semiconductor refrigeration components (33) are attached to both sides of the positive electrolyte heat exchanger (13), and the switching power supply (35) The output DC power supplies power to the semiconductor refrigeration assembly (33), and the positive electrode electrolyte heat exchanger fan (15) is installed below the semiconductor refrigeration assembly (33), and the semiconductor refrigeration assembly (33) is forward energized or reversely energized It determines whether the semiconductor refrigeration assembly (33) is in the cooling mode or the heating mode. This control is realized by the controller (26) controlling the relay (31) through the wire (61), and the positive electrolyte heat exchanger (13 ) through the positive electrode electrolyte heat exchanger fan (15) and the semiconductor cooling assembly (33) to implement the temperature control of the positive electrode electrolyte; both sides of the negative electrode electrolyte heat exchanger (14) are attached with semiconductor cooling assemblies (34) , the DC power supply output by the switching power supply (35) supplies power to the semiconductor refrigeration assembly (34), and the negative electrode electrolyte heat exchanger fan (16) is installed below the semiconductor refrigeration assembly (34), to the semiconductor refrigeration assembly (34) Whether the power is forward or reverse determines whether the semiconductor refrigeration assembly (34) is in the cooling or heating mode. This control is realized by the controller (26) controlling the relay (32) through the wire (67). The electrolyte heat exchanger (14) controls the temperature of the negative electrode electrolyte through the negative electrode electrolyte heat exchanger fan (16) and the semiconductor refrigeration assembly (34). 3. The communication all-vanadium redox flow battery system according to claim 1, characterized in that: the positive electrolyte circulation pump (5) and the positive electrolyte circulation pump (6) are respectively powered by the positive electrolyte circulation pump motor (9) and The positive electrode electrolyte circulation pump motor (10) is driven, and they are mutual backups, and their start, stop and failover are all controlled and implemented by the controller (26) through wires (54) and wires (55); the negative electrode electrolyte circulation pump (7) and the negative electrode electrolyte circulating pump (8) are respectively driven by the negative electrode electrolyte circulating pump motor (11) and the negative electrode electrolyte circulating pump motor (12). The controller (26) controls the implementation through wires (58) and wires (59). 4. The communication all-vanadium redox flow battery system according to claim 1, characterized in that: a positive electrode electrolyte liquid storage tank level gauge (21) and a positive electrode electrolyte liquid storage tank (1) are respectively installed on the positive electrode electrolyte liquid storage tank (1). liquid storage tank temperature sensors (23), their output signals are passed to the controller (26) by wires (68) and wires (53) to realize display and control; A positive electrode electrolyte liquid storage tank liquid level gauge (22) and a positive electrode electrolyte liquid storage tank temperature sensor (24), their output signals are sent to the controller (26) through the wire (69) and the wire (57) to realize the display and control.

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