Water pump control circuit and energy storage device

Abstract

The application discloses a water pump control circuit and an energy storage device. The water pump control circuit comprises a control module, a first switch module, a second switch module, a third switch module, a power supply detection module and a first action module. The power supply detection module outputs a power-on signal when both the first power supply and the second power supply are normally powered on, and outputs a power-off signal when the second power supply is powered off; the first action module, when the first water pump fails, disconnects the path between the first switch module and the first water pump, and simultaneously outputs a first fault signal. The control module is configured to: in response to the power-on signal, control the first switch module and the second switch module to be turned on and the third switch module to be turned off; in response to the power-off signal, control the first switch module to be turned on, the second switch module to be turned off and the third switch module to be turned off; and in response to the first fault signal, control the first switch module and the second switch module to be turned off, and control the third switch module to be turned on. The device stability can be improved.

Description

Technical Field

[0001] This application relates to the field of electronic technology, specifically to a water pump control circuit and energy storage device. Background Technology

[0002] During the black start process of the energy storage grid, the water pump needs to start the UPS (Uninterruptible Power Supply) to enter a single-pump self-circulation mode (such as the independent circulation of the cooling system to ensure heat dissipation of the core components of the energy storage equipment). However, the existing power switching mechanism has a lag in response. During black start, the switching between the mains power and the UPS may cause the water pump to lose power briefly due to delay or interference, which will disrupt the continuity of the self-circulation. Utility Model Content

[0003] This application provides a water pump control circuit and an energy storage device, which can improve the stability of the device.

[0004] In a first aspect, embodiments of this application provide a water pump control circuit, the water pump control circuit comprising: Control module; The system comprises a first switch module, a second switch module, and a third switch module. The first switch module is connected in series between the first power supply and the first water pump. The second switch module is connected in series between the second power supply and the second water pump. The third switch module is connected in series between the first power supply and the second water pump. The first switch module, the second switch module, and the third switch module are also connected to the control module. A power detection module is connected to the control module, the first power supply, and the second power supply respectively. The power detection module is used to output a power-on signal to the control module when both the first power supply and the second power supply are normally powered, and is also used to output a power-off signal to the control module when the second power supply is powered off. A first action module is connected in series between the first switch module and the first water pump, and the first action module is also connected to the control module; the first action module is used to disconnect the path between the first switch module and the first water pump when the first water pump fails, and at the same time output a first fault signal to the control module. The control module is configured to: in response to the power-on signal, control the first switch module to turn on, the second switch module to turn on, and the third switch module to turn off; in response to the power-off signal, control the first switch module to turn on, the second switch module to turn off, and the third switch module to turn off; and in response to the first fault signal, control the first switch module to turn off, the second switch module to turn off, and the third switch module to turn on.

[0005] In some embodiments, the first switch module includes: a first relay, the contacts of the first relay being connected in series between the first power supply and the first water pump, and the coil of the first relay being connected to the control module.

[0006] In some embodiments, the second switching module includes: a second relay, the contacts of the second relay being connected in series between the second power supply and the second water pump, and the coil of the second relay being connected to the control module.

[0007] In some embodiments, the third switch module includes a third relay, the contacts of which are connected in series between the first power supply and the second water pump, and the coil of the third relay is connected to the control module.

[0008] In some embodiments, the power detection module includes: A first phase sequence protector and a second phase sequence protector, wherein the first phase sequence protector is connected to the first power supply and the control module respectively, and the second phase sequence protector is connected to the second power supply and the control module respectively; The fourth relay has its coil connected to the second power supply and its contacts connected to the control module.

[0009] In some embodiments, the coil of the second relay, the normally closed contact of the third relay, and the normally open contact of the fourth relay are connected in series.

[0010] In some embodiments, the coil of the third relay, the normally closed contact of the first relay, the normally closed contact of the second relay, and the normally closed contact of the fourth relay are connected in series.

[0011] In some embodiments, the water pump control circuit further includes: a second action module, which is connected in series between the second switch module and the second water pump, and is also connected to the control module; the second action module is used to disconnect the path between the second switch module and the second water pump when the second water pump fails, and simultaneously output a second fault signal to the control module.

[0012] In some embodiments, the water pump control circuit further includes: a third action module, which is connected in series between the third switch module and the second water pump, and is also connected to the control module; the third action module is used to disconnect the path between the third switch module and the second water pump when the second water pump fails, and at the same time output a third fault signal to the control module.

[0013] Secondly, embodiments of this application provide an energy storage device, which includes the water pump control circuit described above.

[0014] This application provides a water pump control circuit and energy storage device. When both the first and second power supplies are normally powered, the circuit controls the first and second water pumps to operate simultaneously, ensuring stable system output. When the second power supply (e.g., mains power) fails, it quickly switches to single-pump operation and uses the first power supply (e.g., UPS power) to ensure continuous self-circulation in special scenarios such as black starts. Furthermore, when the first water pump fails, the second water pump is quickly activated via a third switch module, reducing operational interruptions caused by single-pump failures. Thus, when the mains power fails, the circuit responds and switches to a single-pump operation mode powered by the UPS power supply, and when one water pump fails, it switches to the other, improving the stability of the equipment. Attached Figure Description

[0015] The technical solution and other beneficial effects of this application will become apparent from the following detailed description of specific embodiments in conjunction with the accompanying drawings.

[0016] Figure 1 This is a structural block diagram of a water pump control circuit provided in one embodiment of this application; Figure 2 A structural block diagram of a water pump control circuit provided in another embodiment of this application; Figure 3 A schematic diagram of the circuit structure of the first switch module, the second switch module, the third switch module, the power detection module, the first action module, the second action module, and the third action module in a water pump control circuit provided in an embodiment of this application; Figure 4 A schematic diagram of the circuit structure of the control module in a water pump control circuit provided in an embodiment of this application; Figure 5 This is a schematic diagram illustrating the interlocking connection relationship of a first relay, a second relay, a third relay, and a fourth relay provided in an embodiment of this application. Detailed Implementation

[0017] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0018] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Features thus defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0019] Please see Figure 1 , Figure 1 This is a structural block diagram of a water pump control circuit 100 provided in an embodiment of this application.

[0020] like Figure 1 As shown, the water pump control circuit 100 includes a control module 10, a first switch module 20, a second switch module 30, a third switch module 40, a power detection module 50, and a first action module 60.

[0021] The system comprises three interconnected modules: a first switch module 20 connected in series between the first power supply 201 and the first water pump 301; a second switch module 30 connected in series between the second power supply 202 and the second water pump 302; and a third switch module 40 connected in series between the first power supply 201 and the second water pump 302. The first switch module 20, the second switch module 30, and the third switch module 40 are also connected to the control module 10. A power detection module 50 is connected to the control module 10, the first power supply 201, and the second power supply 202. A first actuation module 60 is connected in series between the first switch module 20 and the first water pump 301, and is also connected to the control module 10.

[0022] Specifically, the power detection module 50 is used to output a power-on signal to the control module 10 when both the first power supply 201 and the second power supply 202 are normally powered on; it is also used to output a power-off signal to the control module 10 when the second power supply 202 is powered off. The first action module 60 is used to disconnect the path between the first switch module 20 and the first water pump 301 when the first water pump 301 fails, and simultaneously output a first fault signal to the control module 10. The control module 10 is used to: control the first switch module 20 to turn on, the second switch module 30 to turn on, and the third switch module 40 to turn off in response to the power-on signal; control the first switch module 20 to turn on, the second switch module 30 to turn off, and the third switch module 40 to turn off in response to the power-off signal; and control the first switch module 20 to turn off, the second switch module 30 to turn off, and the third switch module 40 to turn on in response to the first fault signal.

[0023] In this embodiment, the second power source 202 can be mains power. The first power source 201 can be a UPS (Uninterruptible Power Supply) or other power source. A UPS includes components such as a rectifier, inverter, and battery. A UPS is an emergency power supply device used to provide stable power to equipment when the mains power supply is abnormal.

[0024] In practical applications, the power detection module 50 monitors the power supply status of the first power supply 201 and the second power supply 202 in real time.

[0025] First, when both the first power supply 201 and the second power supply 202 are powered normally, the power detection module 50 outputs a power-on signal to the control module 10. In response to the power-on signal, the control module 10 controls the first switch module 20 to conduct, connecting the first power supply 201 to the first water pump 301; controls the second switch module 30 to conduct, connecting the second power supply 202 to the second water pump 302; and controls the third switch module 40 to disconnect the circuit between the first power supply 201 and the second water pump 302. Thus, the first water pump 301 operates from the first power supply 201, and the second water pump 302 operates from the second power supply 202.

[0026] Next, if the second power supply 202 fails, the power detection module 50 outputs a power failure signal to the control module 10. In response to the power failure signal, the control module 10 controls the first switch module 20 to turn on, connecting the first power supply 201 to the first water pump 301; controls the second switch module 30 to turn off, disconnecting the connection between the second power supply 202 and the second water pump 302; and controls the third switch module 40 to turn off, disconnecting the connection between the first power supply 201 and the second water pump 302. Thus, the first water pump receives power from the first power supply 201 and begins operation.

[0027] Then, if the first water pump 301 malfunctions, the first action module 60 will disconnect the path between the first switch module 20 and the first water pump 301 and simultaneously output a first fault signal to the control module 10. In response to the first fault signal, the control module 10 controls the first switch module 20 to disconnect the path between the first power supply 201 and the first water pump 301, controls the second switch module 30 to disconnect the path between the second power supply 202 and the second water pump 302, and controls the third switch module 40 to connect the first power supply 201 and the second water pump 302. Thus, the second water pump 302 receives power from the second power supply 202 and operates, while the first water pump 301 cannot receive power and therefore does not operate.

[0028] In summary, the water pump control circuit 100 provided in this application embodiment can improve the single pump operation mode that responds to and switches to UPS power supply when the mains power fails, and can switch to another water pump when one water pump fails, thereby improving the stability of the equipment.

[0029] Please see Figure 2 , Figure 2 This is a structural block diagram of a water pump control circuit 100 provided in another embodiment of this application.

[0030] In some embodiments, the water pump control circuit 100 further includes a second action module 70. The second action module 70 is connected in series between the second switch module 30 and the second water pump 302, and is also connected to the control module 10. Specifically, the second action module 70 is used to disconnect the path between the second switch module 30 and the second water pump 302 when the second water pump 302 malfunctions, and simultaneously output a second fault signal to the control module 10.

[0031] In this embodiment, the control module 10 is further configured to control the first switch module 20 to turn on, the second switch module 30 to turn off, and the third switch module 40 to turn off in response to the second fault signal. This causes the first water pump 301 to receive power from the first power supply 201 and operate, while the second water pump 302 is unable to receive power and therefore does not operate.

[0032] In some embodiments, the water pump control circuit 100 further includes a third action module 80. The third action module 80 is connected in series between the third switch module 40 and the second water pump 302, and is also connected to the control module 10. Specifically, the third action module 80 is used to disconnect the path between the third switch module 40 and the second water pump 302 when the second water pump 302 malfunctions, and simultaneously output a third fault signal to the control module 10.

[0033] In this embodiment, the control module 10 is further configured to control the first switch module 20 to turn on, the second switch module 30 to turn off, and the third switch module 40 to turn off in response to a third fault signal. This causes the first water pump 301 to receive power from the first power supply 201 and operate, while the second water pump 302 is unable to receive power and therefore does not operate.

[0034] Please refer to the following: Figure 3 and Figure 4 , Figure 3 This is a schematic diagram of the circuit structure of the first switch module 20, the second switch module 30, the third switch module 40, the power detection module 50, the first action module 60, the second action module 70, and the third action module 80 in a water pump control circuit 100 provided in an embodiment of this application. Figure 4 This is a schematic diagram of the circuit structure of the control module 10 in the water pump control circuit 100 provided in an embodiment of this application.

[0035] In some embodiments, such as Figure 3 As shown, the first switch module 20 includes a first relay KM1. The contacts of the first relay KM1 are connected in series between the first power supply 201 and the first water pump 301, as shown below. Figure 4As shown, the coil of the first relay KM1 is connected to the control module 10.

[0036] In some embodiments, such as Figure 3 As shown, the second switch module 30 includes a second relay KM2. The contacts of the second relay KM2 are connected in series between the second power supply 202 and the second water pump 302, as shown below. Figure 4 As shown, the coil of the second relay KM2 is connected to the control module 10.

[0037] In some embodiments, such as Figure 3 As shown, the third switch module 40 includes a third relay KM3. The contacts of the third relay KM3 are connected in series between the first power supply 201 and the second water pump 302, as shown below. Figure 4 As shown, the coil of the third relay KM3 is connected to the control module 10.

[0038] In some embodiments, such as Figure 3 As shown, the power detection module 50 includes a first phase sequence protector JVR2, a second phase sequence protector JVR1, and a fourth relay KM4. The first phase sequence protector JVR2 is connected to the first power supply 201 and the control module 10, respectively; the second phase sequence protector JVR1 is connected to the second power supply 202 and the control module 10, respectively; the coil of the fourth relay KM4 is connected to the second power supply 202, and the contacts of the fourth relay KM4 are connected to the control module 10.

[0039] Both the first phase sequence protector JVR2 and the second phase sequence protector JVR1 are power supply phase sequence protectors. The first power supply 201 and the second power supply 202 may experience faults, such as missing phases, incorrect phases, excessively high voltage, or excessively low voltage.

[0040] In this embodiment, the power-on signal includes a first power-on signal and a second power-on signal. The first phase sequence protector JVR2 is used to detect whether the first power supply 201 is normally powered (no fault). If the first power supply 201 fails, the first phase sequence protector JVR2 sends a first dry contact signal to the control module 10. If the first power supply 201 is normally powered, the first phase sequence protector JVR2 sends a first power-on signal (opposite to the first dry contact signal) to the control module 10. The second phase sequence protector JVR1 is used to detect whether the second power supply 202 is normally powered (no fault). If the second power supply 202 fails, the second phase sequence protector JVR1 sends a second dry contact signal to the control module 10. If the second power supply 202 is normally powered, the second phase sequence protector JVR1 sends a second power-on signal (opposite to the second dry contact signal) to the control module 10.

[0041] In this embodiment, the fourth relay KM4 is used to detect whether the second power supply 202 is powered off. When the second power supply 202 is normal, the coil of the fourth relay KM4 is energized, and the contact point of the fourth relay KM4 connected to the control module 10 is closed. When the second power supply 202 is powered off, the coil of the fourth relay KM4 is de-energized, and the contact point of the fourth relay KM4 connected to the control module 10 is opened, forming a power-off signal. Thus, the control module 10 can determine whether the second power supply 202 is powered off by the contact state of the fourth relay KM4.

[0042] In some embodiments, such as Figure 3 As shown, the first action module 60 includes a thermal relay FR1, which is connected in series between the first relay KM1 and the first water pump 301, as follows. Figure 4 As shown, the normally closed contact of the thermal relay FR1 is also connected to the control module 10.

[0043] In some embodiments, such as Figure 3 As shown, the second action module 70 includes a thermal relay FR2, which is connected in series between the second relay KM2 and the second water pump 302. Figure 4 As shown, the normally closed contact of the thermal relay FR2 is also connected to the control module 10.

[0044] In some embodiments, such as Figure 3 As shown, the third action module 80 includes a thermal relay FR3, which is connected in series between the third relay KM3 and the second water pump 302. Figure 4 As shown, the normally closed contact of the thermal relay FR3 is also connected to the control module 10.

[0045] In this embodiment, thermal relays FR1, FR2, and FR3 are all used to disconnect the circuit between the corresponding water pump and the power supply if the water pump's operating current is too high (i.e., water pump failure) when the water pump is connected to the power supply, and output a fault signal to the control module 10.

[0046] In some embodiments, such as Figure 4 As shown, the control module 10 includes a motherboard AP1. The motherboard AP1 includes: Power terminal L1 and power terminal N1 are respectively connected to the first power supply 201; In addition, the digital output terminal DO1 and the corresponding power supply terminal N are connected in series between the two terminals, and the coil of the first relay KM1 is connected in series between them. Figure 4 The normally closed contacts of KM1 and the third relay KM3 ( Figure 4 (KM3-NC) In addition, a digital output terminal DO2 and a corresponding power supply terminal N are connected in series with a connector X1 between the two terminals; And, digital input terminals DI1, DI2, DI3, DI4, DI5, and DI6, digital input terminal DI1 is connected to the contact of the second phase sequence protector JVR1, digital input terminal DI2 is connected to the contact of the first phase sequence protector JVR2, digital input terminal DI3 is connected to the contact of the fourth relay KM4, digital input terminal DI4 is connected to the contact of the thermal relay FR3, digital input terminal DI5 is connected to the contact of the thermal relay FR2, and digital input terminal DI6 is connected to the contact of the thermal relay FR1; The digital output terminal DO3, switch terminal NO, digital input terminal DI7, power terminal 4, control terminal 3, control terminal 2, and ground terminal 1 are connected to the battery management system (BMS) to communicate with the BMS and transmit information, such as information about the first power failure, the first water pump failure, and the second water pump failure.

[0047] In some embodiments, the motherboard AP1 may be an MCU (Microcontroller Unit) or other control device capable of implementing the functions of this embodiment.

[0048] Please see Figure 5 , Figure 5 This is a schematic diagram showing the interlocking connection relationship of the first relay KM1, the second relay KM2, the third relay KM3, and the fourth relay KM4 provided in an embodiment of this application.

[0049] In some embodiments, such as Figure 5 As shown, the coil of the second relay KM2, the normally closed contact (KM3-NC) of the third relay KM3, and the normally open contact (KM4-NO) of the fourth relay KM4 are connected in series. Simultaneously, the control module 10 is connected via connector X1.

[0050] It should be noted that a normally open contact refers to a contact that closes when the relay coil is energized and opens when the relay coil is de-energized. A normally closed contact refers to a contact that opens when the relay coil is energized and closes when the relay coil is de-energized.

[0051] In this embodiment, the normally closed contact of the third relay KM3 is connected to the coil of the second relay KM2, so that when the third relay KM3 is energized, the second relay KM2 cannot be energized.

[0052] Connect the normally open contact of the fourth relay KM4 to the coil of the second relay KM2 so that when the fourth relay KM4 is disconnected (the second power supply 202 is de-energized), the second relay KM2 cannot be energized.

[0053] In some embodiments, the coil of the third relay KM3, the normally closed contact (KM1-NC) of the first relay KM1, the normally closed contact (KM2-NC) of the second relay KM2, and the normally closed contact (KM4-NC) of the fourth relay KM4 are connected in series. Simultaneously, the control module 10 is connected via connector X1.

[0054] In this embodiment, the normally closed contact of the first relay KM1 is connected to the coil of the third relay KM3, so that when the first relay KM1 is energized, the third relay KM3 cannot be energized.

[0055] Connect the normally closed contact of the second relay KM2 to the coil of the third relay KM3 so that when the second relay KM2 is energized, the third relay KM3 cannot be energized.

[0056] Connect the normally closed contact of the fourth relay KM4 to the coil of the third relay KM3 so that when the fourth relay KM4 is energized (the second power supply 202 is powered), the third relay KM3 cannot be energized.

[0057] The water pump control circuit 100 provided in this application embodiment controls the first water pump and the second water pump to work simultaneously when both the first power supply and the second power supply are normally powered, ensuring stable system output; when the second power supply (e.g., mains power) fails, it quickly switches to single-pump operation and uses the first power supply (e.g., UPS power supply) to ensure self-circulation continuity in special scenarios such as black start; and when the first water pump fails, it quickly activates the second water pump through a third switch module to reduce operation interruption caused by single-pump failure, thereby responding to and switching to UPS power supply single-pump operation mode when the mains power fails, and switching to the other water pump when one water pump fails, thus improving the stability of the equipment.

[0058] This application also provides an energy storage device, which includes the water pump control circuit 100 as described above.

[0059] The specific structure and working principle of the water pump control circuit 100 can be referred to the above embodiments, and will not be repeated here.

[0060] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0061] The above provides a detailed description of a water pump control circuit and energy storage device provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A water pump control circuit, characterized in that, The water pump control circuit includes: Control module; The system comprises a first switch module, a second switch module, and a third switch module. The first switch module is connected in series between the first power supply and the first water pump. The second switch module is connected in series between the second power supply and the second water pump. The third switch module is connected in series between the first power supply and the second water pump. The first switch module, the second switch module, and the third switch module are also connected to the control module. A power detection module is connected to the control module, the first power supply, and the second power supply respectively. The power detection module is used to output a power-on signal to the control module when both the first power supply and the second power supply are normally powered, and is also used to output a power-off signal to the control module when the second power supply is powered off. A first action module is connected in series between the first switch module and the first water pump, and the first action module is also connected to the control module; the first action module is used to disconnect the path between the first switch module and the first water pump when the first water pump fails, and at the same time output a first fault signal to the control module. The control module is configured to: in response to the power-on signal, control the first switch module to turn on, the second switch module to turn on, and the third switch module to turn off; in response to the power-off signal, control the first switch module to turn on, the second switch module to turn off, and the third switch module to turn off; and in response to the first fault signal, control the first switch module to turn off, the second switch module to turn off, and the third switch module to turn on.

2. The water pump control circuit according to claim 1, characterized in that, The first switch module includes: The first relay has its contacts connected in series between the first power supply and the first water pump, and its coil is connected to the control module.

3. The water pump control circuit according to claim 2, characterized in that, The second switch module includes: The second relay has its contacts connected in series between the second power supply and the second water pump, and its coil is connected to the control module.

4. The water pump control circuit according to claim 3, characterized in that, The third switch module includes: The third relay has its contacts connected in series between the first power supply and the second water pump, and its coil is connected to the control module.

5. The water pump control circuit according to claim 4, characterized in that, The power detection module includes: A first phase sequence protector and a second phase sequence protector, wherein the first phase sequence protector is connected to the first power supply and the control module respectively, and the second phase sequence protector is connected to the second power supply and the control module respectively; The fourth relay has its coil connected to the second power supply and its contacts connected to the control module.

6. The water pump control circuit according to claim 5, characterized in that, The coil of the second relay, the normally closed contact of the third relay, and the normally open contact of the fourth relay are connected in series.

7. The water pump control circuit according to claim 5, characterized in that, The coil of the third relay, the normally closed contact of the first relay, the normally closed contact of the second relay, and the normally closed contact of the fourth relay are connected in series.

8. The water pump control circuit according to claim 1, characterized in that, The water pump control circuit also includes: The second action module is connected in series between the second switch module and the second water pump, and is also connected to the control module. The second action module is used to disconnect the connection between the second switch module and the second water pump when the second water pump fails, and at the same time output a second fault signal to the control module.

9. The water pump control circuit according to claim 1, characterized in that, The water pump control circuit also includes: The third action module is connected in series between the third switch module and the second water pump, and is also connected to the control module. The third action module is used to disconnect the path between the third switch module and the second water pump when the second water pump fails, and at the same time output a third fault signal to the control module.

10. An energy storage device, characterized in that, The energy storage device includes a water pump control circuit as described in any one of claims 1 to 9.

Images