A chain control circuit, energy storage air conditioner and energy storage device

Abstract

The application discloses a chain control circuit, an energy storage air conditioner and an energy storage device; the chain control circuit comprises a first terminal group; a first relay, the normally open contact of the first relay is connected with a main power supply, the normally closed contact of the first relay is connected with a backup power supply, and the common end of the first relay is connected with a first interface and a second interface in the first terminal group; a second relay, the normally closed contact of the second relay is connected with an alarm signal interface of a controller, and the coil of the second relay is connected in series between the second interface and the fourth interface in the first terminal group; wherein when an external alarm is triggered, the normally closed contact of the second relay is disconnected, so that the alarm signal interface receives a first alarm signal; the controller is used for outputting a communication signal to an external battery management system through a communication interface according to the first alarm signal, so as to control the main power supply to be disconnected and the backup power supply to be started; and the application can improve the reliability of the energy storage device.

Description

Technical Field

[0001] This application relates to the field of air conditioning technology, specifically to an interlocking control circuit, an energy storage air conditioner, and an energy storage device. Background Technology

[0002] In current energy storage containers, the energy storage air conditioner cannot be interlocked with the fire protection system and battery management system. In the event of a fire, the fire protection system (including fire alarms, smoke detectors, etc.) and battery management system cannot establish an effective interlock with the energy storage air conditioner, thus failing to effectively protect the energy storage air conditioner and reducing the reliability of the energy storage device.

[0003] Therefore, the technology still needs to be improved and enhanced. Summary of the Invention

[0004] This application provides an interlocking control circuit, an energy storage air conditioner, and an energy storage device, which can alleviate the problem of low reliability of energy storage devices caused by the current interlocking control between energy storage air conditioners, fire protection systems, and battery management systems.

[0005] This application provides an interlocking control circuit, which is applied in an energy storage air conditioner, the energy storage air conditioner including a controller; the interlocking control circuit includes:

[0006] The first terminal group includes a first interface, a second interface, a third interface, and a fourth interface; the first interface is connected to the third interface; the third interface and the fourth interface are used to connect to an external alarm; the power supply terminal of the controller is connected to the first interface and the second interface.

[0007] The first relay has its normally open contact connected to the main power supply, its normally closed contact connected to the backup power supply, its common terminal connected to the first interface and the second interface, and its coil connected in series in the power supply circuit of the main power supply.

[0008] The second relay has its normally closed contact connected to the alarm signal interface of the controller, and its coil is connected in series between the second interface and the fourth interface.

[0009] When the external alarm is triggered, the normally closed contact of the second relay opens, allowing the alarm signal interface to receive the first alarm signal. The controller outputs a communication signal through the communication interface based on the first alarm signal to control the main power supply to disconnect and the backup power supply to start.

[0010] In some embodiments of the interlocking control circuit, the interlocking control circuit further includes a third relay, and the first terminal group further includes a fifth interface and a sixth interface;

[0011] The normally closed contact of the third relay is connected to the alarm signal interface, and the coil of the third relay is connected in series between the second and sixth interfaces; the fifth interface is connected to the first interface, and the fifth and sixth interfaces are used to receive the second alarm signal output by the external battery management system.

[0012] When the second alarm signal is connected to the fifth and sixth interfaces, the normally closed contact of the third relay opens; the controller is used to output a communication signal through the communication interface according to the second alarm signal, so as to control the main power supply to disconnect and the backup power supply to start.

[0013] In some embodiments of the interlocking control circuit, the interlocking control circuit further includes a fourth relay, the normally closed contact of the fourth relay being connected to the alarm signal interface of the controller; the coil of the fourth relay is used in series between the second interface and the input interface of the fire damper; the normally closed contact of the third relay is also used in series between the first interface and the first power interface of the fire damper, the second interface is also used to be connected to the second power interface of the fire damper, and the first interface is also used to be connected to the output interface of the fire damper.

[0014] When the second alarm signal is connected to the fifth and sixth interfaces, the normally closed contact of the third relay opens, causing the fire damper to shut off and close.

[0015] When the fire damper activates, the normally closed contact of the fourth relay closes to send a third alarm signal to the controller; the controller is used to output a communication signal through the communication interface based on the third alarm signal to control the main power supply to disconnect and the backup power supply to start.

[0016] In some embodiments of the interlocking control circuit, the first terminal group further includes a seventh interface and an eighth interface; the seventh interface and the eighth interface are used to connect to an external power management system, respectively.

[0017] The normally open contact of the second relay is connected between the seventh and eighth interfaces; the normally open contact of the fourth relay is connected between the seventh and eighth interfaces.

[0018] Specifically, when the normally open contact of the second relay or the normally open contact of the fourth relay is closed, the main power supply is disconnected and the backup power supply is started.

[0019] In some embodiments of the interlocking control circuit, the energy storage air conditioner further includes an internal fan; the interlocking control circuit also includes a first AC contactor, a second AC contactor, a first thermal relay, and a second thermal relay.

[0020] The normally open contact of the first AC contactor is connected in series between the first thermal relay and the main power supply. The first thermal relay is also connected to the internal fan. The normally open contact of the second AC contactor is connected in series between the second thermal relay and the backup power supply. The second thermal relay is also connected to the internal fan.

[0021] The normally open contacts of the second relay, the normally open contacts of the third relay, and the normally open contacts of the fourth relay are connected in parallel and then connected in series between the first interface and the second interface with the normally closed contacts of the second thermal relay, the first AC contactor, and the coil of the second AC contactor.

[0022] When any one of the normally open contacts of the second relay, the third relay, and the fourth relay is closed, the normally open contact of the second AC contactor closes, causing the internal fan to reverse; when the normally open contact of the first AC contactor is closed, the internal fan rotates forward.

[0023] In some embodiments of the interlocking control circuit, the interlocking control circuit further includes a second terminal group, a first thermal relay is connected to the interior fan through the second terminal group, and a second thermal relay is connected to the interior fan through the second terminal group.

[0024] In some embodiments of the interlocking control circuit, the energy storage air conditioner also includes an airtight valve;

[0025] The normally open contacts of the second relay, the third relay, and the fourth relay are connected in parallel and then connected in series with the second thermal relay and the airtight valve between the first and second interfaces.

[0026] The airtight valve is activated when any one of the normally open contacts of the second, third, and fourth relays is closed.

[0027] In some embodiments of the interlocking control circuit, the normally closed contact of the second AC contactor is connected in series with the coil of the first AC contactor between the two fan start interfaces in the controller.

[0028] This application also provides an energy storage air conditioner, which includes the interlocking control circuit described above.

[0029] This application also provides an energy storage device, including an alarm, a battery management system, and the aforementioned energy storage air conditioner; both the alarm and the battery management system are electrically connected to the interlocking control circuit in the energy storage air conditioner.

[0030] This application provides an interlocking control circuit, an energy storage air conditioner, and an energy storage device. The interlocking control circuit is formed by setting a first terminal group, a first relay, and a second relay. When an alarm is triggered, a closing signal is simultaneously sent to the energy storage air conditioner through the interlocking control circuit. The controller then transmits a signal to the battery management system, causing the battery management system to cut off the main power supply, thus stopping the load connected to the main power supply and preventing load damage. Simultaneously, the battery management system controls the activation of the backup power supply, which powers the controller to ensure its normal operation. The controller can also control the connected load to stop working and transmit a signal to the battery management system, thereby achieving interlocking control and improving the reliability of the energy storage device. Attached Figure Description

[0031] 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.

[0032] Figure 1 A schematic diagram showing the connection between the interlocking control circuit and the fire protection system, battery management system, main power supply and backup power supply provided in the embodiments of this application.

[0033] Figure 2 This is a schematic diagram showing the connection between the controller and the first relay, the second relay, and the first terminal group in the interlocking control circuit provided in the embodiments of this application.

[0034] Figure 3 A schematic diagram showing the connection between the first and second relays and the main power supply and the backup power supply in the interlocking control circuit provided in the embodiments of this application.

[0035] Figure 4 A schematic diagram showing the connection between the controller and the third and fourth relays in the interlocking control circuit provided in the embodiments of this application.

[0036] Figure 5 This is a schematic diagram showing the connection between the second and fourth relays and the first terminal group in the interlocking control circuit provided in the embodiments of this application.

[0037] Figure 6 A schematic diagram showing the connection between the interlocking control circuit and the compressor and condenser fan provided in the embodiments of this application. Detailed Implementation

[0038] 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.

[0039] 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" and "second" may explicitly or implicitly include one or more features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0040] Please see Figure 1 This embodiment provides an interlocking control circuit 12, which is applied to an energy storage air conditioner 1, which includes a controller 11. In some embodiments, the energy storage air conditioner 1 is applied to an energy storage device, such as an energy storage container, which includes a power distribution cabinet 2, a fire protection system 4, and a battery management system 3. The fire protection system 4 includes an alarm 41, such as a smoke alarm, which will activate when a fire occurs. The power distribution cabinet 2 includes a main power supply 21 and a backup power supply 22. When the energy storage air conditioner 1 is applied to an energy storage device, the controller 11 in the energy storage air conditioner 1 can be electrically connected to the fire protection system 4, such as the alarm 41, through the interlocking control circuit 12. It is also connected to the main power supply 21, the backup power supply 22, and the battery management system 3 through the interlocking control circuit 12. The controller 11 is also connected to the battery management system 3, which is also connected to other devices 5, and the main power supply 21 is also connected to other devices 5.

[0041] Please refer to the following: Figure 2 and Figure 3 Specifically, the interlocking control circuit 12 includes a first terminal group X1, a first relay KA1, and a second relay KA2; the first terminal group X1 includes a first interface 01, a second interface 02, a third interface 03, and a fourth interface 04; the first interface 01 is connected to the third interface 03; the third interface 03 and the fourth interface 04 are used to connect to an external alarm 41, such as a smoke alarm; the power supply terminal 111 of the controller 11 is connected to the first interface 01 and the second interface 02; the normally open contact of the first relay KA1 is connected to the main power supply 21, the normally closed contact of the first relay KA1 is connected to the backup power supply 22, the common terminal of the first relay KA1 is connected to the first interface 01 and the second interface 02, the coil of the first relay KA1 is connected in series in the power supply circuit of the main power supply 21, the normally closed contact of the second relay KA2 is connected to the alarm signal interface 112 of the controller 11, and the coil of the second relay KA2 is connected in series between the second interface 02 and the fourth interface 04.

[0042] When the energy storage air conditioner 1 is working normally, the main power supply 21 is turned on. Since the coil of the first relay KA1 is connected in series in the power circuit of the main power supply 21, the first relay KA1 is energized, causing the normally closed contact of the first relay KA1 to open and the normally open contact of the first relay KA1 to close. At this time, the first interface 01 and the second interface 02 are connected to the power circuit of the main power supply 21 to provide power to the energy storage air conditioner 1, ensuring the normal operation of the controller 11.

[0043] When the external alarm 41 is triggered, it sends a closing signal to the interlocking control circuit 12 through the third interface 03 and the fourth interface 04. The coil of the second relay KA2 is energized by connecting to the power circuit of the main power supply 21 through the first interface 01 and the second interface 02, and the normally closed contact of the second relay KA2 opens. Since the normally closed contact of the second relay KA2 is connected in series between the two alarm signal interfaces 112 in the controller 11, when the normally closed contact of the second relay KA2 opens, the two alarm signal interfaces 112 are disconnected. At this time, the controller 11 is equivalent to receiving the first alarm signal. Then, the controller 11 shuts down the load connected to it and outputs a communication signal to the battery management system 3 through the communication interface 113 to transmit a signal to the battery management system 3, so that the external battery management system 3 receives the alarm signal. After receiving the signal, the external battery management system 3 controls the main power supply 21 to stop output and controls the backup power supply 22 to start; at the same time, the battery management system 3 also controls other devices 5 connected to it to stop working, thereby preventing damage to other devices 5.

[0044] When the first relay KA1 in the power circuit connected in series with the main power supply 21 loses power, the normally closed contact of the first relay KA1 returns to the normally closed state, connecting the first interface 01 and the second interface 02 to the backup power supply 22. The backup power supply 22 continues to supply power to the controller 11 through the first interface 01 and the second interface 02, ensuring that the controller 11 can work; that is, it establishes an electrical connection with the battery management system 3 and the alarm 41, and can control the loads connected to it to stop working, thereby realizing interlocking control.

[0045] The interlocking control circuit 12 can identify whether the main power supply 21 is energized via the first relay KA1 in the power circuit of the main power supply 21. When the main power supply 21 is energized, the power supply to the first interface 01 and the second interface 02 of the first terminal group X1 comes from the main power supply 21; when the main power supply 21 is de-energized, the power supply to the first interface 01 and the second interface 02 of the first terminal group X1 comes from the backup power supply 22. When the main power supply 21 and the backup power supply 22 are energized simultaneously, the power supply to the first interface 01 and the second interface 02 of the first terminal group X1 comes from the main power supply 21, preventing the two power supplies from short-circuiting and causing a fire, thus ensuring the safety and reliability of the energy storage device.

[0046] In this embodiment, an interlocking control circuit 12 is formed by setting up a first terminal group X1, a first relay KA1, and a second relay KA2. When the alarm 41 is triggered, a closing signal is simultaneously sent to the energy storage air conditioner 1 through the interlocking control circuit 12. The controller 11 then transmits a signal to the battery management system 3, so that the battery management system 3 can cut off the main power supply 21, causing the load connected to the main power supply 21 to stop working and preventing damage to the load. At the same time, the battery management system 3 controls the start of the backup power supply 22, which supplies power to the controller 11 to ensure the normal operation of the controller 11. The controller 11 controls the load connected to it to stop working and transmits a signal to the battery management system 3, thereby realizing interlocking control and improving the reliability of the energy storage device.

[0047] Please refer to the following: Figure 4 In some embodiments, the interlocking control circuit 12 further includes a third relay KA3, and the first terminal group X1 further includes a fifth interface 05 and a sixth interface 06; the normally closed contact of the third relay KA3 is connected to the alarm signal interface 112, and the coil of the third relay KA3 is connected in series between the second interface 02 and the sixth interface 06; the fifth interface 05 is connected to the first interface 01, and the fifth interface 05 and the sixth interface 06 are used to receive a second alarm signal output by the external battery management system 3.

[0048] In this embodiment, the battery management system 3 can also acquire a fire alarm signal and output it to the energy storage air conditioner 1 via the interlocking control circuit 12. Specifically, when the second alarm signal is received by the fifth interface 05 and the sixth interface 06, the third relay KA3 is energized, causing its normally closed contact to open. The opening of the normally closed contact of the third relay KA3 is equivalent to sending a second alarm signal to the controller 11. At the same time, the controller 11 outputs a communication signal to the external battery management system 3 via the communication interface 113 based on the second alarm signal, causing the external battery management system 3 to control the main power supply 21 to disconnect and the backup power supply 22 to start, ensuring the normal operation of the controller 11 while controlling other loads to stop working. In this embodiment, the addition of the third relay KA3 enables the energy storage air conditioner 1 to acquire the alarm signal from the battery management system 3 and achieve interlocking control, thereby improving the flexibility of the interlocking control circuit 12.

[0049] In some embodiments, the interlocking control circuit 12 further includes a fourth relay KA4, the normally closed contact of which is connected to the alarm signal interface 112 of the controller 11; the coil of the fourth relay KA4 is connected in series between the second interface 02 and the input interface of the fire damper S1; the normally closed contact of the third relay KA3 is also connected in series between the first interface 01 and the first power interface of the fire damper S1, the second interface 02 is also connected to the second power interface of the fire damper S1, and the first interface 01 is also connected to the output interface of the fire damper S1.

[0050] In this embodiment, when the second alarm signal is received by the fifth interface 05 and the sixth interface 06, the normally closed contact of the third relay KA3 opens. At this time, on the one hand, the controller 11 can respond to the second alarm signal and send a communication signal to the battery management system 3; on the other hand, the opening of the normally closed contact of the third relay KA3 can de-energize and close the fire damper S1.

[0051] In this embodiment, if the normally closed contact of the third relay KA3 remains closed, the fire damper S1 is energized. If the fire damper S1 is working, the coil of the fourth relay KA4 is energized, causing the normally closed contact of the fourth relay KA4 to open. This is equivalent to the air conditioner being able to obtain the third alarm signal at this time. Similarly, the air conditioner is used to output a communication signal to the external battery management system 3 through the communication interface 113 according to the third alarm signal, so that the external battery management system 3 controls the main power supply 21 to disconnect and the backup power supply 22 to start, thereby realizing interlocking control.

[0052] In this embodiment, the interlocking control circuit 12 is equipped with a second relay KA2, a third relay KA3, and a fourth relay KA4. The normally closed contacts of the second relay KA2, the third relay KA3, and the fourth relay KA4 are connected in series between the two alarm signal interfaces 112 in the air conditioner. The opening of the normally closed contact of any relay can trigger the control to respond, thereby improving the reliability of the interlocking control circuit 12.

[0053] Please refer to the following: Figure 5 In some embodiments, the first terminal group X1 further includes a seventh interface 07 and an eighth interface 08; the seventh interface 07 and the eighth interface 08 are used to connect to an external power management system, respectively. The normally open contact of the second relay KA2 is connected between the seventh interface 07 and the eighth interface 08; the normally open contact of the fourth relay KA4 is connected between the seventh interface 07 and the eighth interface 08; wherein, when the normally open contact of the second relay KA2 or the normally open contact of the fourth relay KA4 is closed, the external power management system controls the main power supply 21 to disconnect and the backup power supply 22 to start.

[0054] In this embodiment, when the normally closed contact of the second relay KA2 (or the fourth relay KA4) opens, the controller 11 acquires the corresponding alarm signal and sends a corresponding communication signal to the battery management system 3. Simultaneously, the normally open contact of the second relay KA2 (or the fourth relay KA4) closes, allowing a passive dry-connection electrical signal to be directly transmitted to the battery management system 3 via the seventh interface 07 and the eighth interface 08, enabling the battery management system 3 to receive the signal. This is equivalent to sending a signal to the battery management system 3 through the controller 11 on one hand, and directly through the hardware circuit on the other, achieving a dual protection mechanism. Even if the controller 11 malfunctions, it can still ensure that the fire alarm signal is transmitted to the battery management system 3.

[0055] Please continue reading. Figure 3 In some embodiments, the energy storage air conditioner 1 further includes an indoor fan 13; the interlocking control circuit 12 further includes a first AC contactor KM1, a second AC contactor KM2, a first thermal relay FR1, and a second thermal relay FR2; the normally open contact of the first AC contactor KM1 is connected in series between the first thermal relay FR1 and the main power supply 21, and the first thermal relay FR1 is also connected to the indoor fan 13; the normally open contact of the second AC contactor KM2 is connected in series between the second thermal relay FR2 and the backup power supply 22, and the second thermal relay FR2 is also connected to the indoor fan 13; the normally open contact of the second relay KA2, the normally open contact of the third relay KA3, and the normally open contact of the fourth relay KA4 are connected in parallel, and then connected in series with the normally closed contact of the second thermal relay FR2, the first AC contactor KM1, and the coil of the second AC contactor KM2 between the first interface 01 and the second interface 02.

[0056] In this embodiment, the UVW terminals of the internal fan 13 are connected to the three-phase terminals of the main power supply 21, respectively. Any two of the UVW terminals of the internal fan 13 are swapped and connected to the three-phase terminals of the backup power supply 22. For example, the U terminal of the internal fan 13 is connected to the U power terminal 111 of the backup power supply 22, the V terminal of the internal fan 13 is connected to the W power terminal 111 of the backup power supply 22, and the W terminal of the internal fan 13 is connected to the V power terminal 111 of the backup power supply 22. When the internal fan 13 is connected to the power circuit of the main power supply 21, the internal fan 13 rotates forward; when the internal fan 13 is connected to the power circuit of the backup power supply 22, the internal fan 13 rotates in reverse.

[0057] Specifically, when any one of the normally open contacts of the second relay KA2, the third relay KA3, and the fourth relay KA4 is closed, the normally open contact of the second AC contactor KM2 closes, causing the indoor fan 13 to reverse; when the normally open contact of the first AC contactor KM1 is closed, the indoor fan 13 rotates forward. That is, when the energy storage air conditioner 1 is working normally, the power circuit of the main power supply 21 is normal, and the indoor fan 13 is connected to the power circuit of the main power supply 21 and rotates forward. In the event of a fire, when any one of the second relay KA2, the third relay KA3, and the fourth relay KA4 is triggered, the controller 11 shuts down the load and sends a communication signal to the battery management system 3. At the same time, the internal fan 13 is connected to the power circuit of the backup power supply 22 via the power circuit of the main power supply 21 through the first relay KA1 and reverses. If the fire damper S1 is installed in the return air vent of the energy storage air conditioner 1, the fire damper S1 will close and the return air vent will be sealed when a fire occurs, which can prevent smoke from flowing back into the container from the return air vent when the internal fan 13 is reversed.

[0058] In some embodiments, the interlocking control circuit 12 further includes a second terminal group X2. A first thermal relay FR1 is connected to an internal fan 13 via the second terminal group X2, and a second thermal relay FR2 is also connected to the internal fan 13 via the second terminal group X2. In this embodiment, by setting the second terminal group X2, the power supply line of the internal fan 13 is first connected to the second terminal group X2; then, the first thermal relay FR1 and the second thermal relay FR2 are connected to the second terminal group X2. This saves power lines compared to connecting the first thermal relay FR1 and the second thermal relay FR2 to the internal fan 13 separately; simultaneously, it simplifies wiring to improve production efficiency.

[0059] In some embodiments, the energy storage air conditioner 1 further includes an airtight valve S2; the normally open contact of the second relay KA2, the normally open contact of the third relay KA3, and the normally open contact of the fourth relay KA4 are connected in parallel and connected in series with the second thermal relay FR2 and the airtight valve S2 between the first interface 01 and the second interface 02; when any one of the normally open contacts of the second relay KA2, the third relay KA3, and the fourth relay KA4 is closed, the airtight valve S2 is activated.

[0060] In this embodiment, when a fire occurs, if any one of the second relay KA2, the third relay KA3, or the fourth relay KA4 is triggered, the controller 11 shuts down the load and sends a communication signal to the battery management system 3. Simultaneously, the internal fan 13 reverses from the main power supply 21's power circuit to the backup power supply 22's power circuit via the first relay KA1; correspondingly, the airtight valve S2 is energized and opens, allowing the internal fan 13 to reverse and act as a smoke exhaust fan. If the fire damper S1 is installed in the return air vent of the energy storage air conditioner 1, it closes during a fire, sealing the return air vent and preventing smoke from flowing back into the container from the return air vent when the internal fan 13 reverses.

[0061] In some embodiments, the normally closed contact of the second AC contactor KM2 is connected in series with the coil of the first AC contactor KM1 between the two fan start interfaces 114 in the controller 11, thereby achieving interlocking of the two AC contactors for starting the internal fan 13, preventing the two AC contactors from closing and starting simultaneously, and preventing short circuit and fire between the main power supply 21 and the backup power supply 22.

[0062] In this embodiment, the interlocking control circuit 12 switches between the main power supply 21 and the backup power supply 22 by setting the first relay KA1. When the power circuit of the main power supply 21 is disconnected, the backup power supply 22 can be activated to ensure that the controller 11 can maintain power supply to acquire data and then transmit signals to the battery management system 3.

[0063] Please refer to the following: Figure 6 In some embodiments, the interlocking control circuit 12 further includes a third AC contactor KM3, a fourth AC contactor KM4, a third thermal relay FR3, and a fourth thermal relay FR4; the energy storage air conditioner 1 also includes a compressor 15 and a condenser fan 14. The main power supply 21 is connected to the third thermal relay FR3 via the normally open contact of the third AC contactor KM3, and the third thermal relay FR3 is connected to the condenser fan 14; the main power supply 21 is connected to the fourth thermal relay FR4 via the normally open contact of the fourth AC contactor KM4, and the fourth thermal relay FR4 is connected to the compressor 15; the coil of the third AC contactor KM3 is connected in series with two connection interfaces in the controller 11 that control the start of the condenser fan 14 (e.g., ...). Figure 4 As shown in Figure 115), the coil of the fourth AC contactor KM4 is connected in series to the two connection interfaces in the controller 11 that control the start of the compressor 15 (as shown in Figure 115). Figure 4 As shown in Figure 116, in this embodiment, the controller 11 controls the third AC contactor KM3 and the fourth AC contactor KM4 to control the condenser fan 14 and the compressor 15.

[0064] In some embodiments, the interlocking control circuit 12 further includes a first circuit breaker QF1 and a second circuit breaker QF2. The first circuit breaker QF1 is connected in series between the main power supply 21 and the first relay KA1, and the second circuit breaker QF2 is connected in series between the backup power supply 22 and the first relay KA1. In this embodiment, circuit breakers are provided to improve the safety of the interlocking control circuit 12.

[0065] This application sets up a hardware circuit structure, namely the interlocking control circuit 12, to interlock the battery management system 3, the fire protection system 4, and the energy storage air conditioner 1 together. When a fault occurs, it can promptly cut off the main power supply 21 to ensure that the main power supply 21 is not damaged. Compared with the communication control method, it is safer and more reliable, and there are no communication delay or interference problems.

[0066] In addition, the internal fan 13 in this embodiment is used as a smoke exhaust fan. By setting an interlocking structure between the first AC contactor KM1 and the second AC contactor KM2, short circuits and cross-current will not occur, which could damage the device and ensure high reliability.

[0067] This application also provides an energy storage air conditioner, which includes the interlocking control circuit described above; since the interlocking control circuit has been described in detail above, it will not be repeated here.

[0068] This application also provides an energy storage device such as an energy storage container, which includes an alarm, a battery management system and the aforementioned energy storage air conditioner; the alarm and the battery management system are both electrically connected to the interlocking control circuit in the energy storage air conditioner.

[0069] In this embodiment, an interlocking control circuit is installed in the energy storage air conditioner. The alarm, fire damper, and fire alarm signals in the energy storage device are switched via a first relay, enabling any alarm trigger signal to trigger a fire suppression system. Specifically, a passive dry contact signal is transmitted to the battery management system through the seventh and eighth interfaces of the first terminal group. Upon receiving the dry contact signal, the battery management system transmits it to the main power supply and backup power supply, controlling the main power supply to shut down and the backup power supply to start, and also controlling other devices connected to the battery management system to stop operating. Correspondingly, when the main power supply is not switched, the fire damper and airtight valve start, and the compressor, internal fan, and external fan of the energy storage air conditioner stop; when the main power supply switches to the backup power supply, the corresponding internal fan of the energy storage air conditioner immediately reverses.

[0070] In this application, a first relay is installed in the interlocking control circuit, which can identify whether the main power supply is energized in the power circuit. Specifically, when the main power supply is energized, the power to the first and second interfaces of the first terminal group comes from the main power supply; when the main power supply is de-energized, the power to the first and second interfaces of the first terminal group comes from the backup power supply. When the main power supply and the backup power supply are energized simultaneously, the power to the first and second interfaces of the first terminal group comes from the main power supply, preventing a short circuit between the two power supplies that could lead to a fire, thus ensuring the safety and reliability of the device. Since the interlocking control circuit has been described in detail above, it will not be repeated here.

[0071] 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.

[0072] The interlocking control circuit provided in the embodiments of this application has been described in detail above. 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 they can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for 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. An interlocking control circuit, characterized in that, The interlocking control circuit is applied in an energy storage air conditioner, which includes a controller; the interlocking control circuit includes: A first terminal group, comprising a first interface, a second interface, a third interface, and a fourth interface; the first interface is connected to the third interface; the third interface and the fourth interface are used for connection to an external alarm; the power supply terminal of the controller is connected to the first interface and the second interface. The first relay has its normally open contact connected to the main power supply, its normally closed contact connected to the backup power supply, its common terminal connected to the first interface and the second interface, and its coil connected in series in the power supply circuit of the main power supply. The second relay has its normally closed contact connected to the alarm signal interface of the controller, and its coil is connected in series between the second interface and the fourth interface. When the external alarm is triggered, the normally closed contact of the second relay opens, causing the alarm signal interface to receive the first alarm signal; the controller is used to output a communication signal through the communication interface according to the first alarm signal, so as to control the main power supply to disconnect and the backup power supply to start. The interlocking control circuit further includes a third relay, and the first terminal group further includes a fifth interface and a sixth interface; the normally closed contact of the third relay is connected to the alarm signal interface, and the coil of the third relay is connected in series between the second interface and the sixth interface; the fifth interface is connected to the first interface, and the fifth interface and the sixth interface are used to receive a second alarm signal output by an external battery management system; The interlocking control circuit also includes a fourth relay, the normally closed contact of which is connected to the alarm signal interface of the controller; the coil of the fourth relay is connected in series between the second interface and the input interface of the fire damper; the normally closed contact of the third relay is also connected in series between the first interface and the first power interface of the fire damper, the second interface is also connected to the second power interface of the fire damper, and the first interface is also connected to the output interface of the fire damper. The energy storage air conditioner also includes an internal fan; the interlocking control circuit also includes a first AC contactor, a second AC contactor, a first thermal relay, and a second thermal relay. The normally open contact of the first AC contactor is connected in series between the first thermal relay and the main power supply, and the first thermal relay is also connected to the internal fan; the normally open contact of the second AC contactor is connected in series between the second thermal relay and the backup power supply, and the second thermal relay is also connected to the internal fan. The normally open contact of the second relay, the normally open contact of the third relay, and the normally open contact of the fourth relay are connected in parallel, and then connected in series between the first interface and the second interface with the normally closed contact of the second thermal relay, the normally closed contact of the first AC contactor, and the coil of the second AC contactor. When any one of the normally open contacts of the second relay, the third relay, and the fourth relay is closed, the normally open contact of the second AC contactor closes, causing the internal fan to reverse; when the normally open contact of the first AC contactor is closed, the internal fan rotates forward.

2. The interlocking control circuit according to claim 1, characterized in that, When the second alarm signal is received by the fifth interface and the sixth interface, the normally closed contact of the third relay is opened; the controller is used to output a communication signal through the communication interface according to the second alarm signal, so as to control the main power supply to be disconnected and the backup power supply to be started.

3. The interlocking control circuit according to claim 2, characterized in that, When the second alarm signal is connected to the fifth interface and the sixth interface, the normally closed contact of the third relay opens, causing the fire damper to be de-energized and closed. When the fire damper is activated, the normally closed contact of the fourth relay closes to send a third alarm signal to the controller; the controller is used to output a communication signal through the communication interface according to the third alarm signal to control the main power supply to disconnect and the backup power supply to start.

4. The interlocking control circuit according to claim 3, characterized in that, The first terminal group further includes a seventh interface and an eighth interface; the seventh interface and the eighth interface are used to connect to an external power management system, respectively; The normally open contact of the second relay is connected between the seventh interface and the eighth interface; the normally open contact of the fourth relay is connected between the seventh interface and the eighth interface. Specifically, when the normally open contact of the second relay or the normally open contact of the fourth relay is closed, the main power supply is disconnected and the backup power supply is started.

5. The interlocking control circuit according to claim 1, characterized in that, The interlocking control circuit also includes a second terminal group, through which the first thermal relay is connected to the internal fan, and the second thermal relay is connected to the internal fan.

6. The interlocking control circuit according to claim 1, characterized in that, The energy storage air conditioner also includes an airtight valve; The normally open contact of the second relay, the normally open contact of the third relay, and the normally open contact of the fourth relay are connected in parallel, and then connected in series with the normally closed contact of the second thermal relay and the airtight valve between the first interface and the second interface. The airtight valve is activated when any one of the normally open contacts of the second relay, the third relay, and the fourth relay is closed.

7. The interlocking control circuit according to claim 6, characterized in that, The normally closed contact of the second AC contactor is connected in series with the coil of the first AC contactor between the two fan start interfaces in the controller.

8. An energy storage air conditioner, characterized in that, The energy storage air conditioner includes the interlocking control circuit as described in any one of claims 1-7.

9. An energy storage device, characterized in that, It includes an alarm, a battery management system, and an energy storage air conditioner as described in claim 8; both the alarm and the battery management system are electrically connected to the interlocking control circuit in the energy storage air conditioner.

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