Combiner cabinet

Abstract

A combiner cabinet, comprising a battery master control module, an isolation switch, and a switch circuit. A first end and a second end of the isolation switch are electrically connected to a first bus and a second end of the switch circuit respectively; and a first end, a third end and a fourth end of the switch circuit are electrically connected to a second bus, a third end of the isolation switch, and the battery master control module respectively. The battery master control module is configured to control the connection and disconnection of the first end and the second end of the switch circuit so as to control the opening and closing of the isolation switch.

Description

Busbar cabinet

[0001]

[0002] The present application claims priority to the Chinese patent application No. 202422386208.3 filed on September 27, 2024, to the Chinese Patent Office, the content of the above application is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present application relates to the technical field of energy storage, in particular to a busbar cabinet. BACKGROUND

[0004] The centralized energy storage container is a kind of energy storage system integrating large-scale energy storage equipment and control devices in a container, which generally consists of a battery cluster, a fire extinguishing system, a thermal management system, an air conditioner, an AC / DC integrated busbar cabinet, a water immersion temperature and humidity sensor, a lighting system, etc.

[0005] The main control module of the battery management system is arranged in the AC / DC integrated busbar cabinet, and the interaction and control strategy of each system in the centralized energy storage container can be completed by the main control module. SUMMARY

[0006] However, the interaction and control strategy of each system still has deficiencies, especially after an internal fault occurs in the centralized energy storage container, the main circuit of the centralized energy storage container cannot be cut off in time, resulting in poor safety and reliability of the centralized energy storage container.

[0007] The present application provides a busbar cabinet, comprising:

[0008] a battery main control module;

[0009] a disconnecting switch, a first end of the disconnecting switch being electrically connected to a first busbar;

[0010] a switch circuit, a first end of the switch circuit being electrically connected to a second busbar, a second end of the switch circuit being electrically connected to a second end of the disconnecting switch, a third end of the switch circuit being electrically connected to a third end of the disconnecting switch, and a fourth end of the switch circuit being electrically connected to the battery main control module;

[0011] The battery main control module is configured to control the on-off between the first end and the second end of the switch circuit to control the opening and closing of the disconnecting switch. ADVANTAGEOUS EFFECTS

[0012] The application provides a busbar cabinet, which comprises a battery master control module, a disconnecting switch and a switching circuit, the first end of the disconnecting switch is electrically connected with a first busbar, the first end of the switching circuit is electrically connected with a second busbar, the second end of the switching circuit is electrically connected with the second end of the disconnecting switch, the third end of the switching circuit is electrically connected with the third end of the disconnecting switch, and the fourth end of the switching circuit is electrically connected with the battery master control module, and the battery master control module is configured to control the on-off between the first end and the second end of the switching circuit to control the opening and closing of the disconnecting switch, so that the battery master control module in the busbar cabinet can be used to control the disconnection between the first end and the second end of the switching circuit in time after a fault of an energy storage system occurs, and then the disconnecting switch in the busbar cabinet can be opened to cut off the main circuit of the energy storage system, thereby greatly improving the safety and reliability of the energy storage system. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 is a first schematic block diagram of the busbar cabinet provided by the application;

[0014] Fig. 2 is a second schematic block diagram of the busbar cabinet provided by the application;

[0015] Fig. 3 is a third schematic block diagram of the busbar cabinet provided by the application;

[0016] Fig. 4 is a structural schematic diagram of a relay provided by the application;

[0017] Fig. 5 is a fourth schematic block diagram of the busbar cabinet provided by the application;

[0018] Fig. 6 is a fifth schematic block diagram of the busbar cabinet provided by the application;

[0019] Fig. 7 is a circuit diagram of the busbar cabinet provided by the application.

[0020] Reference signs:

[0021] 10, busbar cabinet; 110, battery master control module; 120, disconnecting switch; 121, separate exciting coil; 122, closing coil; 130, switching circuit; 131, first switch; 132, second switch; 133, first coil; 134, second coil; 140, emergency stop circuit; 141, emergency stop switch; 142, third switch; 143, third coil. Embodiments of the application

[0022] Please refer to Fig. 1, which is a first schematic block diagram of the busbar cabinet 10 provided by the embodiment of the application. As shown in Fig. 1, the application provides a busbar cabinet 10, which comprises:

[0023] a battery master control module 110;

[0024] a disconnecting switch 120, the first end of the disconnecting switch 120 being electrically connected with a first busbar;

[0025] The switch circuit 130 has a first end electrically connected to the second busbar, a second end electrically connected to the second end of the disconnecting switch 120, a third end electrically connected to the third end of the disconnecting switch 120, and a fourth end electrically connected to the battery master module 110.

[0026] The battery master module 110 is configured to control the on-off between the first end and the second end of the switch circuit 130 to control the opening and closing of the disconnecting switch 120.

[0027] The battery master module 110 can be a master battery management unit (MBMU) of a battery management system, which is a core component in the battery management system and is responsible for intelligent monitoring and management of the power battery. The battery management system of a typical centralized energy storage system adopts a three-level architecture, including cell monitoring, battery cluster control, and overall control of the entire energy storage system, thereby ensuring multi-level management and control from the cell to the entire system.

[0028] The master battery management unit (MBMU) is responsible for the overall control of the entire energy storage system and can effectively integrate and manage a large amount of battery information, thereby improving the reliability and safety of the energy storage system.

[0029] In this embodiment, the first busbar and the second busbar can be the neutral line N and the live line L, respectively, and can provide a 220V control voltage. The battery master module 110 can send a control signal at the fourth end of the switch circuit 130 to control the on-off between the first end and the second end of the switch circuit 130, thereby achieving control of the opening and closing of the disconnecting switch 120. The busbar cabinet 10 is arranged between the battery cluster and the energy storage converter, and the disconnecting switch 120 in the busbar cabinet 10 can serve as the main switch of the energy storage system. When the disconnecting switch 120 is opened, the main circuit of the energy storage system is cut off; when the disconnecting switch 120 is closed, the main circuit of the energy storage system is closed.

[0030] Specifically, when the first end and the second end of the switch circuit 130 are conductive, the first end and the second end of the disconnecting switch 120 are conductive to open the disconnecting switch 120, thereby cutting off the main circuit of the energy storage system; when the first end and the second end of the switch circuit 130 are disconnected, the first end and the second end of the disconnecting switch 120 are disconnected to close the disconnecting switch 120, thereby closing the main circuit of the energy storage system.

[0031] The busbar cabinet 10 provided in the application comprises a battery master module 110, a disconnecting switch 120 and a switch circuit 130, the first end of the disconnecting switch 120 is electrically connected to the first busbar, the first end of the switch circuit 130 is electrically connected to the second busbar, the second end of the switch circuit 130 is electrically connected to the second end of the disconnecting switch 120, the third end of the switch circuit 130 is electrically connected to the third end of the disconnecting switch 120, the fourth end of the switch circuit 130 is electrically connected to the battery master module 110, and the battery master module 110 is configured to control the on-off between the first end and the second end of the switch circuit 130 to control the opening and closing of the disconnecting switch 120, so that the battery master module 110 in the busbar cabinet 10 can be used to control the disconnection between the first end and the second end of the switch circuit 130 in time after the failure of the energy storage system, and then the disconnecting switch 120 in the busbar cabinet 10 is opened to cut off the main circuit of the energy storage system, thereby greatly improving the safety and reliability of the energy storage system.

[0032] In some embodiments, as shown in FIG. 2, the disconnecting switch 120 comprises a split-field coil 121 and a closing coil 122; the first end of the disconnecting switch 120 is provided with a first contact C2 and a second contact A2, and the second end of the disconnecting switch 120 is provided with a third contact C1 and a fourth contact A1; the first contact C2 and the second contact A2 are both electrically connected to the first busbar, and the third contact C1 and the fourth contact A1 are respectively electrically connected to the second end of the switch circuit 130; one end of the split-field coil 121 is electrically connected to the first contact C2, and the other end of the split-field coil 121 is electrically connected to the second contact A2; one end of the closing coil 122 is electrically connected to the third contact C1, and the other end of the closing coil 122 is electrically connected to the fourth contact A1.

[0033] In the embodiment, the disconnecting switch 120 can be an MVS DA1 DC disconnecting switch 120, and the disconnecting switch 120 can be provided with the split-field coil 121 and the closing coil 122; the first end of the disconnecting switch 120 is provided with the first contact C2 and the second contact A2, and the second end of the disconnecting switch 120 is provided with the third contact C1 and the fourth contact A1; one end of the split-field coil 121 is electrically connected to the first busbar through the first contact C2, and the other end of the split-field coil 121 is electrically connected to the second end of the switch circuit 130 through the third contact C1; one end of the closing coil 122 is electrically connected to the second busbar through the second contact A2, and the other end of the closing coil 122 is electrically connected to the second end of the switch circuit 130 through the fourth contact A1, so that the disconnecting switch 120 can be opened after the split-field coil 121 is powered on, and the disconnecting switch 120 can be closed after the closing coil 122 is powered on.

[0034] Specifically, after the disconnector 120 in FIG. 2 is applied to the circuit diagram of the busbar cabinet 10 shown in FIG. 7, the split field coil 121 can be the coil MX, the closing coil 122 can be the coil XF, one end of the coil MX is electrically connected to the first busbar through the contact C2, and the other end of the coil MX is electrically connected to the second end of the switch circuit 130 through the contact C1; one end of the coil XF is electrically connected to the first busbar through the contact A2, and the other end of the coil XF is electrically connected to the second end of the switch circuit 130 through the contact A1.

[0035] In some embodiments, when the first end and the second end of the switch circuit 130 are connected, the split field coil 121 can be powered and the closing coil 122 can not be powered, thereby the disconnector 120 can be opened; when the first end and the second end of the switch circuit 130 are disconnected, the split field coil can not be powered and the closing coil 122 can be powered, thereby the disconnector 120 can be closed.

[0036] In some embodiments, when the first end and the second end of the switch circuit 130 are connected, the split field coil 121 can not be powered and the closing coil 122 can be powered, thereby the disconnector 120 can be closed; when the first end and the second end of the switch circuit 130 are disconnected, the split field coil can be powered and the closing coil 122 can not be powered, thereby the disconnector 120 can be opened.

[0037] In some embodiments, as shown in FIG. 3, the switch circuit 130 includes a first relay KA1 and a second relay KA2; wherein the first relay KA1 includes a first switch 131 and a first coil 133, one end of the first switch 131 is electrically connected to the third contact C1, and the other end of the first switch 131 is electrically connected to the second busbar; one end of the first coil 133 is electrically connected to the third end of the disconnector 120, and the other end of the first coil 133 is electrically connected to the battery master module 110; the second relay KA2 includes a second switch 132 and a second coil 134, one end of the second switch 132 is electrically connected to the third contact C1, and the other end of the second switch 132 is electrically connected to the second busbar; one end of the second coil 134 is electrically connected to the third end of the disconnector 120, and the other end of the second coil 134 is electrically connected to the battery master module 110.

[0038] In this embodiment, the battery master module 110 can control the on-off of the first relay KA1 and the second relay KA2 in the switch circuit 130 to realize the power-on of the split field coil 121 and the closing coil 122 in the disconnector 120, and the opening and closing of the disconnector 120, thereby realizing the closing of the main loop of the closed energy storage system.

[0039] The first relay KA1 and the second relay KA2 can each be an intermediate relay, which can be the relay shown in FIG. 4. Specifically, the first relay KA1 and the second relay KA2 can be an 8-pin intermediate relay, which includes two normally open contacts, two normally closed contacts, two common terminals, a positive terminal, and a negative terminal. After the 8-pin intermediate relay is connected in a circuit, each common terminal is electrically connected to a normally closed contact, and the two ends of the coil are respectively electrically connected between the positive terminal and the negative terminal. When it is necessary to disconnect the circuit in which the 8-pin intermediate relay is located, the positive terminal and the negative terminal are conducted to energize the coil, at which time the coil generates a magnetic force to disconnect the common terminal from the normally closed contact, while the common terminal is electrically connected to the normally open contact, thereby achieving the disconnection of the circuit in which the 8-pin intermediate relay is located.

[0040] Specifically, as shown in FIG. 4, the two normally closed contacts include contacts 1 and 4, the two normally open contacts include contacts 5 and 8, the two common terminals include contacts 9 and 12, and the positive terminal and the negative terminal can be contacts 13 and 14. Among them, the contacts 5 and 9 can be regarded as a first switch 131 of the first relay KA1 and a second switch 132 of the second relay KA2, and the contacts 13 and 14 can be regarded as the two ends of the first coil 133 and the second coil 134. Among them, the two ends of the coil can be connected in parallel with a series-connected resistor R1 and a light-emitting diode D2, and the two ends of the coil can also be connected with an anti-reverse diode D1.

[0041] In some embodiments, the 8-pin intermediate relay in FIG. 4, when applied to the circuit diagram of the busbar cabinet 10 shown in FIG. 7, the first coil 133 and the second coil 134 are each respectively arranged between the battery master control module 110 and the third end of the disconnector 120, one end of the first coil 133 is electrically connected to the contact C15 of the battery master control module 110, and the other end of the first coil 133 is electrically connected to the third end of the disconnector 120; one end of the second coil 134 is electrically connected to the contact C14 of the battery master control module 110, and the other end of the second coil 134 is electrically connected to the third end of the disconnector 120; the first switch 131 is arranged between the contact C1 of the disconnector 120 and the second busbar, and the second switch 132 is arranged between the contact A1 of the disconnector 120 and the second busbar.

[0042] In some embodiments, as shown in FIG. 5, the busbar cabinet 10 further includes an emergency stop circuit 140; the first end of the emergency stop circuit 140 is electrically connected to the second busbar, the second end of the emergency stop circuit 140 is electrically connected to the second end of the disconnector 120, the third end of the emergency stop circuit 140 is respectively electrically connected to the third end of the disconnector 120 and the battery master control module 110, and the fourth end of the emergency stop circuit 140 is grounded GND.

[0043] In the embodiment, the emergency stop circuit 140 can also be arranged in the busbar cabinet 10, and thus the emergency stop circuit 140 can be used to perform emergency power-off on the energy storage system in an emergency, so as to further improve the safety and reliability of the energy storage system. Specifically, when the third end and the fourth end of the emergency stop circuit 140 are conducted, the first end and the second end of the emergency stop circuit 140 can be conducted, and thus the shunt coil 121 is powered on to open the disconnecting switch 120.

[0044] It should be noted that the emergency stop circuit 140 can be controlled by the battery master control module 110 or by a manual button, and the specific implementation manner can be selected according to actual application, which is not limited in the present application.

[0045] In some embodiments, as shown in FIG. 6, the emergency stop circuit 140 includes an emergency stop switch 141 and a third relay KA3; the third relay KA3 includes a third switch 142 and a third coil 143; one end of the third switch 142 is electrically connected to the second busbar, and the other end of the third switch 142 is electrically connected to the second end of the disconnecting switch 120; one end of the emergency stop switch 141 is electrically connected to one end of the third coil 143, and the other end of the emergency stop switch 141 is electrically connected to the third end of the disconnecting switch 120 and the battery master control module 110 respectively; and the other end of the third coil 143 is grounded GND.

[0046] In the embodiment, the emergency stop circuit 140 can be composed of the emergency stop switch 141 and the third relay KA3, the third relay KA3 can be the 8-pin middle relay in FIG. 4, the third switch 142 of the third relay KA3 is arranged between the second busbar and the contact C1 of the disconnecting switch 120, and the third coil 143 of the third relay KA3 can be connected in series with the emergency stop switch 141. When it is necessary to perform emergency power-off on the energy storage system, the emergency stop switch 141 can be closed, the third coil 143 is powered on to make the third switch 142 conductive, and thus the shunt coil 121 can be powered on to open the disconnecting switch 120.

[0047] In some embodiments, as shown in FIG. 7, the emergency stop switch 141 includes a first emergency stop switch SB11 and a second emergency stop switch SB21; one end of the first emergency stop switch SB11 and one end of the second emergency stop switch SB21 are electrically connected to the third end of the disconnecting switch 120 and the battery master control module 110 respectively; and the other end of the first emergency stop switch SB11 and the other end of the second emergency stop switch SB21 are electrically connected to one end of the third coil 143 respectively.

[0048] In the embodiment, the first emergency stop switch SB11 can be connected in parallel with the second emergency stop switch SB21, the first emergency stop switch SB11 can be arranged on the front panel of the busbar cabinet 10, and the second emergency stop switch SB21 can be arranged on the shell of the centralized energy storage container or at the energy storage station, so that the safety and reliability of the energy storage system can be further improved.

[0049] In some embodiments, as shown in FIG. 7, the emergency stop switch 141 further includes a first feedback switch SB12 and a second feedback switch SB22; one end of the first feedback switch SB12 is electrically connected to the third end of the isolating switch 120, the other end of the first feedback switch SB12 is electrically connected to one end of the second feedback switch SB22, and the other end of the second feedback switch SB22 is electrically connected to the battery master control module 110.

[0050] In the embodiment, the emergency stop switch 141 can further include a feedback switch arranged between the third end of the isolating switch 120 and the battery master control module 110, the feedback switch includes the first feedback switch SB12 and the first emergency stop switch SB11 can form a group of switches SB1, the second feedback switch SB22 and the second emergency stop switch SB21 can form a group of switches SB2, the two contacts of the first feedback switch SB12 and the second feedback switch SB22 are normally closed, and the first feedback switch SB12 and the second feedback switch SB22 are connected in series; the two contacts of the first emergency stop switch SB11 and the second emergency stop switch SB21 are normally open, and the first emergency stop switch SB11 and the second emergency stop switch SB21 are connected in parallel.

[0051] Specifically, after the emergency stop switch 141 is closed, the emergency stop feedback signal can be fed back to the battery control module by the feedback switch, the battery control module can generate an instruction to report the allowed charging and discharging current and power to the energy storage converter according to the emergency stop feedback signal, and after a first preset time, such as 2s, the isolating switch 120 is tripped through the first emergency stop switch SB11, and then the battery control module issues an instruction to lower the high voltage of the battery cluster after a second preset time, such as 1s.

[0052] In addition, when the feedback switch is loose or incorrectly connected, the battery control module can also receive the emergency stop feedback signal at the feedback switch to stop the energy storage system, so that the energy storage system can avoid the situation of being unable to stop due to loose or incorrect connection during operation.

[0053] In some embodiments, as shown in FIG. 7, the switch circuit 130 further comprises a gear switch SA and a fourth relay KA4; the fourth relay KA4 comprises a fourth switch KA41, a fifth switch KA42 and a fourth coil KA43; one end of the fourth switch KA4 and one end of the fifth switch KA42 are electrically connected to the second bus, the other end of the fourth switch KA4 and the other end of the fifth switch KA42 are electrically connected to the second end of the isolating switch 120; one end of the fourth coil KA43 is electrically connected to one end of the gear switch SA, the other end of the gear switch SA is respectively electrically connected to the third end of the isolating switch 120 and the battery master module 110, and the other end of the fourth coil KA43 is grounded GND.

[0054] Specifically, the gear switch SA can cooperate with the fourth relay KA4 to control the main circuit of the energy storage system under the condition of being away from the energy storage system. When the energy storage system needs to be debugged, the gear switch SA can be opened, and the opening and closing of the isolating switch 120 can be manually controlled; after the energy storage system is debugged, the gear switch SA can be closed, and the fourth relay KA4 can be used to remotely control the opening and closing of the isolating switch 120.

[0055] In this embodiment, the fourth relay KA4 can also be an 8-pin intermediate relay in FIG. 4, the two ends of the fourth switch KA4 can be the contact 5 and the contact 9 of the relay KA2, and the two ends of the fifth switch KA42 can be the contact 8 and the contact 12 of the relay KA2. The fourth switch KA4 is in series with the first switch 131, and the fifth switch KA42 can be in series with the second switch 132.

[0056] In some embodiments, as shown in FIG. 7, the isolating switch 120 further comprises an electric mechanism MCH; the first end of the isolating switch 120 is further provided with a fifth contact B2, and the second end of the isolating switch 120 is further provided with a sixth contact B1; the fifth contact B2 is respectively electrically connected to one end of the electric mechanism MCH and the first bus, and the sixth contact B1 is respectively electrically connected to the other end of the electric mechanism MCH and the second bus.

[0057] In this embodiment, when the isolating switch 120 is closed, the electric mechanism MCH automatically releases energy and automatically stores energy, so that after the isolating switch 120 is opened, instantaneous closing can be maintained, and the electric mechanism MCH can be connected in series with a storage handle switch S4 as a backup when there is no auxiliary power supply. The electric mechanism MCH is equipped with a limit switch contact for displaying the stored energy according to the standard.

[0058] In some embodiments, as shown in FIG. 7, the isolating switch 120 further includes a first auxiliary switch S1, a second auxiliary switch S2 and a third auxiliary switch S3; one end of the first auxiliary switch S1, one end of the second auxiliary switch S2 and one end of the third auxiliary switch S3 are electrically connected to the third end of the isolating switch 120; the other end of the first auxiliary switch S1, the other end of the second auxiliary switch S2 and the other end of the third auxiliary switch S3 are electrically connected to the fourth end of the isolating switch 120, and the fourth end of the isolating switch 120 is grounded GND.

[0059] In the present embodiment, the first auxiliary switch S1 can be provided with a normally open auxiliary contact, the second auxiliary switch S2 can be provided with a normally closed auxiliary contact, and the third auxiliary switch S3 can be provided with a normally open auxiliary contact. The first auxiliary switch S1 is grounded GND through the device reading indicator light RD, the second auxiliary switch S2 is grounded GND through the electric energy indicator light WH, and the third auxiliary switch S3 is electrically connected to the battery control module.

[0060] Specifically, the fourth end of the isolating switch 120 includes a contact 11, a contact 21 and a contact 31. The contact 11 is grounded GND through the device reading indicator light RD, the contact 21 is grounded GND through the electric energy indicator light WH, and the contact 31 is electrically connected to the battery control module through the dry contact XT8:20 to realize signal feedback to the isolating switch 120. In addition, the third end and the fourth end of the isolating switch 120 are also provided with a power indicator light GN.

[0061] In some embodiments, as shown in FIG. 7, the third end of the isolating switch 120 is electrically connected to one end of the low-voltage power supply, and the fourth end of the isolating switch 120 is electrically connected to the other end of the low-voltage power supply.

[0062] In the present embodiment, the low-voltage power supply, such as a 24V control voltage, can be connected to the busbar cabinet 10. The low-voltage power supply can be an AC / DC power supply SP1. The present application can supply power to the battery master module 110 through the low-voltage power supply to ensure the normal operation of the battery master module 110.

[0063] In some embodiments, as shown in FIG. 7, the switch circuit 130 further includes a fire-fighting feedback switch XT1; the first end of the fire-fighting feedback switch XT1 is electrically connected to the third end of the isolating switch 120, and the second end and the third end of the fire-fighting feedback switch XT1 are electrically connected to the battery master module 110.

[0064] In the embodiment, the third end of the fire feedback switch XT1 includes a dry contact XT9:7 and a dry contact XT9:8, the dry contact XT9:7 is electrically connected to the energy storage converter PCS, and the dry contact XT9:8 is electrically connected to the battery master control module 110. The fire feedback switch XT1 is in a normally closed state in the normal operation of the energy storage system, and when a fire event occurs in the energy storage system, the state between the dry contact XT9:7 and the dry contact XT9:8 changes, so that the fire feedback switch XT1 reports a fire feedback signal, and then the battery master control module 110 can generate an instruction to report the allowed charging and discharging current and power to the energy storage converter according to the fire feedback signal, and after a first preset time, such as 2s, the first emergency stop switch SB11 is used to realize the tripping of the isolation switch 120, and then the battery control module issues an instruction to lower the high voltage of the battery cluster after a second preset time, such as 1s.

[0065] In some embodiments, as shown in FIG. 7, the fire feedback switch XT1 includes a fault feedback switch XT11, a single fire alarm switch XT12, and a composite fire alarm switch XT13; one end XT9:1 of the fault feedback switch XT11, one end XT9:3 of the single fire alarm switch XT12, and one end XT9:5 of the composite fire alarm switch XT13 are all electrically connected to the third end of the isolation switch 120, and the other end XT9:2 of the fault feedback switch XT11, the other end XT9:4 of the single fire alarm switch XT12, and the other end XT9:6 of the composite fire alarm switch XT13 are all electrically connected to the battery master control module 110.

[0066] In the embodiment, the fault feedback switch XT11, the single fire alarm switch XT12, and the composite fire alarm switch XT13 are connected in parallel between the battery master control module 110 and the third end of the isolation switch 120, the fault feedback switch XT11 can be used to realize the feedback of the fire fault, the single fire alarm switch XT12 can be used to realize the feedback of the single fire alarm, and the composite fire alarm switch XT13 can be used to realize the feedback of the composite fire alarm. Specifically, the other end XT9:2 of the fault feedback switch XT11 is electrically connected to the contact C24 of the battery master control module 110, the other end XT9:4 of the single fire alarm switch XT12 is electrically connected to the contact C23 of the battery master control module 110, and the other end XT9:6 of the composite fire alarm switch XT13 is electrically connected to the contact C22 of the battery master control module 110.

[0067] Specifically, when the energy storage system has a fire-fighting fault, the state between the dry contact XT9:7 and the dry contact XT9:8 changes, so that the fire-fighting fault feedback signal is reported on the fault feedback switch XT11, and then the battery master control module 110 can generate the instruction of reporting the allowed charging and discharging current and power to the energy storage converter according to the fire-fighting feedback signal, and after the first preset time, such as 2s, the first emergency stop switch SB11 is used to realize the tripping of the isolating switch 120, and then the battery control module issues the instruction of lowering the high voltage of the battery cluster after the second preset time, such as 1s; when the energy storage system has a single fire alarm, the state between the dry contact XT9:7 and the dry contact XT9:8 changes, so that the single fire alarm switch XT12 reports the fire-fighting early warning feedback signal, and then the battery master control module 110 can generate the instruction of reporting the allowed charging and discharging current and power to the energy storage converter according to the fire-fighting feedback signal, and after the first preset time, such as 2s, the first emergency stop switch SB11 is used to realize the tripping of the isolating switch 120, and then the battery control module issues the instruction of lowering the high voltage of the battery cluster after the second preset time, such as 1s; when the energy storage system has a composite fire alarm, the state between the dry contact XT9:7 and the dry contact XT9:8 changes, so that the composite fire alarm switch XT13 reports the fire-fighting spraying feedback signal, and then the battery master control module 110 can generate the instruction of reporting the allowed charging and discharging current and power to the energy storage converter according to the fire-fighting feedback signal, and after the first preset time, such as 2s, the first emergency stop switch SB11 is used to realize the tripping of the isolating switch 120, and then the battery control module issues the instruction of lowering the high voltage of the battery cluster after the second preset time, such as 1s.

[0068] In some embodiments, as shown in FIG. 7, the switch circuit 130 further includes an AC / DC capacitor SPD3 and a backup protection fuse SPD1; one end of the AC / DC capacitor SPD3 is electrically connected to the third end of the isolating switch 120, the other end of the AC / DC capacitor SPD3 is electrically connected to one end of the backup protection fuse SPD1, and the other end of the backup protection fuse SPD1 is electrically connected to the battery master control module 110.

[0069] In the embodiment, the AC / DC capacitor SPD 3 and the backup protection fuse SPD 1 are connected in series between the third end of the disconnector 120 and the battery master control module 110, and the other end of the backup protection fuse SPD 1 is electrically connected to the contact C19 of the battery master control module 110. When the AC / DC surge protector fails or has poor contact, or the backup protection fuse SPD 1 is blown, the contact C19 of the master control module receives a low-level signal, so that the battery master control module 110 can generate an instruction to report the allowed charging and discharging current and power to the energy storage converter according to the low-level signal, and after a first preset time, such as 2s, the disconnector 120 is tripped by the first emergency stop switch SB11, and then the battery control module issues an instruction to lower the high voltage of the battery cluster after a second preset time, such as 1s.

[0070] In some embodiments, as shown in FIG. 7, the switch circuit 130 further includes a cabinet door feedback switch XT2, and the busbar cabinet 10 is further provided with a display screen HMI; the first end of the cabinet door feedback switch XT2 is electrically connected to the display screen HMI, and the second end of the cabinet door feedback switch XT2 is electrically connected to the display screen HMI through dry contacts.

[0071] In the embodiment, the battery master control module 110 includes a plurality of DI interfaces and DO interfaces, the DI interfaces are DI1, DI2, DI3, DI4, DI5 and DI6, DI1 corresponds to the contacts C12 and C24, DI2 corresponds to the contacts C11 and C23, DI3 corresponds to the contacts C10 and C22, DI4 corresponds to the contacts C9 and C21, DI5 corresponds to the contacts C8 and C20, and DI6 corresponds to the contacts C7 and C19; the DO interfaces are DO1, DO3, DO4 and DO5, DO1 corresponds to the contacts C5 and C17, DO3 corresponds to the contacts C3 and C15, DO4 corresponds to the contacts C2 and C14, and DO5 corresponds to the contacts C1 and C13. At the same time, the fault indicator lamp YE is further provided between the contact C13 and the third end of the disconnector 120. In addition, the battery master control module 110 is further provided with the contacts A14, A31 and A32, the display screen HMI activation switch HA is provided between the contact A14 and the third end of the disconnector 120, the contact A31 is electrically connected to the third end of the disconnector 120, the contact A32 is grounded GND, and the contacts A31 and A32 are used to control the power supply of the display screen HMI.

[0072] The cabinet door feedback switch XT2 and the display screen HMI are arranged on the cabinet door of the busbar cabinet 10, the display screen HMI includes an interface VIN, an interface GND, an interface DI2 and an interface GI2, the interface VIN is electrically connected with the third end of the isolation switch 120 and the positive pole of the low-voltage power supply, the interface GND is grounded, the interface DI2 is electrically connected with the contact XT10:10 of the first end of the cabinet door feedback switch XT2, and the second end of the cabinet door feedback switch XT2 is electrically connected with the interface GI2 through the dry contact XT10:3 and the dry contact XT10:9. When the cabinet door of the busbar cabinet 10 is in an open state, the first end and the second end of the cabinet door switch are disconnected, the state between the dry contact XT10:3 and the dry contact XT10:9 changes, and then a low-level signal is received by the battery master control module 110, and display information that the cabinet door of the busbar cabinet 10 is not closed is sent to the energy storage system.

[0073] In addition, the energy storage system of the application is also provided with a fan, a water immersion sensor, a temperature sensor and an uninterruptible power supply. Whether the fan is normally running, whether the liquid cooling machine of the energy storage system is leaking or the container of the energy storage system is flooded, whether the temperature of the battery changes, and the service life of the storage battery of the uninterruptible power supply can all be controlled and processed by the battery master control module 110.

[0074] For example, when the battery master control module 110 receives the stall signal transmitted by the fan, the battery master control module 110 can determine that the fan is in a stall state, in order to avoid the situation that the power supply circuit of the fan is burned out, the display screen HMI can display that the fan is malfunctioning, reminding the maintenance personnel to repair the fan; when receiving the water immersion signal transmitted by the water immersion sensor, the battery master control module 110 can cut off the isolation switch 120 after a first preset time, specifically, the battery control module can first report the instructions of the allowable charging and discharging current and power to the energy storage converter, and after the first preset time, such as 2s, the isolation switch 120 is tripped through the first emergency stop switch SB11, and then the battery control module issues the instruction of the high voltage of the battery cluster after a second preset time, such as 1s; when receiving the battery temperature signal of the energy storage system, the current temperature of the battery can be determined, and then the corresponding liquid cooling instruction is generated to ensure that the battery works in the best temperature range; when receiving the health degree information transmitted by the uninterruptible power supply in the busbar cabinet 10, that is, the health degree information of the storage battery of the uninterruptible power supply, and displaying it on the display screen HMI, the maintenance personnel can be reminded to replace the storage battery of the uninterruptible power supply in time. The communication between the uninterruptible power supply and the battery master control module 110 can be realized through RS485.

Claims

1. A busbar cabinet (10), comprising: a battery master module (110); a disconnecting switch (120), a first end of the disconnecting switch (120) being electrically connected to a first busbar; a switching circuit (130), a first end of the switching circuit (130) being electrically connected to a second busbar, a second end of the switching circuit (130) being electrically connected to a second end of the disconnecting switch (120), a third end of the switching circuit (130) being electrically connected to a third end of the disconnecting switch (120), a fourth end of the switching circuit (130) being electrically connected to the battery master module (110); wherein the battery master module (110) is configured to control the on-off between the first end and the second end of the switching circuit (130) to control the opening and closing of the disconnecting switch (120).

2. The busbar cabinet (10) according to claim 1, wherein the disconnecting switch (120) comprises a split-field coil (121) and a closing coil (122); the first end of the disconnecting switch (120) is provided with a first contact (C2) and a second contact (A2), and the second end of the disconnecting switch (120) is provided with a third contact (C1) and a fourth contact (A1); the first contact (C2) and the second contact (A2) are both electrically connected to the first busbar, and the third contact (C1) and the fourth contact (A1) are respectively electrically connected to the second end of the switching circuit (130); one end of the split-field coil (121) is electrically connected to the first contact (C2), and the other end of the split-field coil (121) is electrically connected to the second contact (A2); one end of the closing coil (122) is electrically connected to the third contact (C1), and the other end of the closing coil (122) is electrically connected to the fourth contact (A1).

3. The busbar cabinet (10) according to claim 2, wherein the switching circuit (130) comprises a first relay (KA1) and a second relay (KA2); the first relay (KA1) comprises a first switch (131) and a first coil (133), one end of the first switch (131) being electrically connected to the third contact (C1), and the other end of the first switch (131) being electrically connected to the second busbar; one end of the first coil (133) is electrically connected to the third end of the disconnecting switch (120), and the other end of the first coil (133) is electrically connected to the battery master module (110); the second relay (KA2) comprises a second switch (132) and a second coil (134), one end of the second switch (132) being electrically connected to the third contact (C1), and the other end of the second switch (132) being electrically connected to the second busbar; one end of the second coil (134) is electrically connected to the third end of the disconnecting switch (120), and the other end of the second coil (134) is electrically connected to the battery master module (110).

4. The busbar cabinet (10) according to any one of claims 1-3, further comprising an emergency stop circuit (140). A first end of the emergency stop circuit (140) is electrically connected to the second bus bar, a second end of the emergency stop circuit (140) is electrically connected to a second end of the isolating switch (120), a third end of the emergency stop circuit (140) is electrically connected to a third end of the isolating switch (120) and the battery master control module (110) respectively, and a fourth end of the emergency stop circuit (140) is grounded.

5. The busbar cabinet (10) according to claim 4, wherein The emergency stop circuit (140) comprises an emergency stop switch (141) and a third relay (KA3). The third relay (KA3) comprises a third switch (142) and a third coil (143), one end of the third switch (142) is electrically connected to the second bus bar, the other end of the third switch (142) is electrically connected to the second end of the isolating switch (120), one end of the third coil (143) is electrically connected to one end of the emergency stop switch (141), the other end of the emergency stop switch (141) is electrically connected to the third end of the isolating switch (120) and the battery master control module (110) respectively, and the other end of the third coil (143) is grounded.

6. The busbar cabinet (10) according to claim 5, wherein The emergency stop switch (141) comprises a first emergency stop switch (SB11) and a second emergency stop switch (SB21). One end of the first emergency stop switch (SB11) and one end of the second emergency stop switch (SB21) are electrically connected to the third end of the isolating switch (120) and the battery master control module (110) respectively, the other end of the first emergency stop switch (SB11) and the other end of the second emergency stop switch (SB21) are electrically connected to one end of the third coil (143) respectively.

7. The busbar cabinet (10) according to claim 6, wherein The emergency stop switch (141) further comprises a first feedback switch (SB12) and a second feedback switch (SB22). One end of the first feedback switch (SB12) is electrically connected to the third end of the isolating switch (120), the other end of the first feedback switch (SB12) is electrically connected to one end of the second feedback switch (SB22), and the other end of the second feedback switch (SB22) is electrically connected to the battery master control module (110).

8. The busbar cabinet (10) according to any one of claims 1-7, wherein The switch circuit (130) further comprises a gear switch (SA) and a fourth relay (KA4). The fourth relay (KA4) comprises a fourth switch (KA41), a fifth switch (KA42) and a fourth coil (KA43), one end of the fourth switch (KA41) and one end of the fifth switch (KA42) are electrically connected to the second bus bar, the other end of the fourth switch (KA41) and the other end of the fifth switch (KA42) are electrically connected to the second end of the isolating switch (120), one end of the fourth coil (KA43) is electrically connected to one end of the gear switch (SA), the other end of the gear switch (SA) is electrically connected to the third end of the isolating switch (120) and the battery master control module (110) respectively, and the other end of the fourth coil (KA43) is grounded.

9. The busbar cabinet (10) according to any one of claims 1-8, wherein, The isolating switch (120) further comprises an electric mechanism (MCH). The first end of the isolating switch (120) is further provided with a fifth contact (B2), and the second end of the isolating switch (120) is further provided with a sixth contact (1); the fifth contact (B2) is electrically connected with one end of the electric mechanism (MCH) and the first busbar respectively, and the sixth contact (1) is electrically connected with the other end of the electric mechanism (MCH) and the second busbar respectively.

10. The busbar cabinet (10) according to any one of claims 1-9, wherein, The isolating switch (120) further comprises a first auxiliary switch (S1), a second auxiliary switch (S2) and a third auxiliary switch (S3). One end of the first auxiliary switch (S1), one end of the second auxiliary switch (S2) and one end of the third auxiliary switch (S3) are electrically connected with the third end of the isolating switch (120); the other end of the first auxiliary switch (S1), the other end of the second auxiliary switch (S2) and the other end of the third auxiliary switch (S3) are electrically connected with the fourth end of the isolating switch (120), and the fourth end of the isolating switch (120) is grounded.

11. The busbar cabinet (10) according to any one of claims 1-10, wherein, The third end of the isolating switch (120) is electrically connected with one end of a low-voltage power supply, and the fourth end of the isolating switch (120) is electrically connected with the other end of the low-voltage power supply.

12. The busbar cabinet (10) according to any one of claims 1-11, wherein, The switch circuit (130) further comprises a fire-fighting feedback switch (XT1). The first end of the fire-fighting feedback switch (XT1) is electrically connected with the third end of the isolating switch (120), and the second end and the third end of the fire-fighting feedback switch (XT1) are electrically connected with the battery master control module (110).

13. The busbar cabinet (10) according to claim 12, wherein The fire-fighting feedback switch (XT1) comprises a fault feedback switch (XT11), a single fire alarm switch (XT12) and a composite fire alarm switch (XT13). One end of the fault feedback switch (XT11), one end of the single fire alarm switch (XT12) and one end of the composite fire alarm switch (XT13) are electrically connected with the third end of the isolating switch (120), and the other end of the fault feedback switch (XT11), the other end of the single fire alarm switch (XT12) and the other end of the composite fire alarm switch (XT13) are electrically connected with the battery master control module (110).

14. The busbar cabinet (10) according to any of claims 1-13, wherein, The switch circuit (130) further comprises an AC-DC capacitor (SPD3) and a backup protection fuse (SPD1). One end of the AC-DC capacitor (SPD3) is electrically connected with the third end of the isolating switch (120), the other end of the AC-DC capacitor (SPD3) is electrically connected with one end of the backup protection fuse (SPD1), and the other end of the backup protection fuse (SPD1) is electrically connected with the battery master control module (110).

15. The busbar cabinet (10) according to any of claims 1-14, wherein, The switch circuit (130) further comprises a cabinet door feedback switch (XT2), and the busbar cabinet (10) is further provided with a display screen (HMI). The first end of the cabinet door feedback switch (XT2) is electrically connected with the display screen (HMI), and the second end of the cabinet door feedback switch (XT2) is electrically connected with the display screen (HMI) through dry contacts.

Images