Energy storage prefabricated cabin redundancy sudden stop control system and energy storage power station

Abstract

The utility model belongs to the technical field of energy storage batteries, and discloses an energy storage prefabricated cabin redundancy scram control system and an energy storage power station. A switch comprising an electric operating mechanism is connected between the energy storage prefabricated cabin and the energy storage converter; the redundancy scram control system comprises a relay and a first conductive circuit; the relay is provided with a relay coil and a relay contact, the first end of the relay coil is connected with one end of the power supply, the second end of the relay coil is connected with the first end of the first conductive circuit, and the first end of the relay contact is connected with the control end of the switch for controlling the electric operating mechanism; the second end of the relay contact is connected with the first end of the first conductive circuit; the second end of the first conductive circuit is connected with the first output end of the battery system management unit BAU and the first output end of the auxiliary system. According to the technical scheme, safety protection of the energy storage prefabricated cabin when the energy storage prefabricated cabin needs to be suddenly stopped is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of energy storage batteries, and particularly relates to a redundant emergency stop control system for an energy storage prefabricated cabin and an energy storage power station. Background Art

[0002] With the development of the times, people pay more and more attention to protecting the environment, and clean energy also develops synchronously. As a clean energy, wind and solar energy can be converted into a large amount of electrical energy. When the electricity generated by wind and solar power generation equipment is in excess, it can be stored in advance using energy storage devices. These pre-stored electric energies can not only be released when the power generation is low, but also participate in the peak and frequency regulation of the power system, playing a role in stabilizing the power system. With the continuous advancement of technology, the capacity of energy storage prefabricated cabins is getting larger and larger, and the functional configuration is gradually increasing. There are always some problems that come with it, such as: when there is a problem with the energy storage prefabricated cabin, emergency disconnection is required.

[0003] The battery array unit (BAU) usually collects monitoring information sent by the auxiliary system. When emergency stop control is required, the signal is sent to the switch, and the electric operator on the switch performs the cut-off action, thereby cutting off the high-voltage connection between the energy storage prefabricated cabin and the outside. However, since the emergency stop operation is an emergency, when a problem occurs in a link in the control loop, the emergency stop operation may not be executed, resulting in a drastic change in the situation.

[0004] In view of the above problems, a new redundant emergency stop control system for energy storage prefabricated cabin and energy storage power station are urgently needed. Utility Model Content

[0005] In order to at least solve the problem in the prior art that safety protection is risky when emergency stop is required, the utility model provides:

[0006] A redundant emergency stop control system for an energy storage prefabricated cabin, wherein a switch including an electric operating mechanism is connected between the energy storage prefabricated cabin and the energy storage converter, and comprises: a relay and a first conductive circuit; the relay comprises a relay coil and a relay contact, the first end of the relay coil is connected to one end of a power supply, the second end of the relay coil is connected to the first end of the first conductive circuit, the first end of the relay contact is connected to a control end of the switch that controls the electric operating mechanism, and the second end of the relay contact is connected to the first end of the first conductive circuit; the second end of the first conductive circuit is respectively connected to the first output end of a battery system management unit BAU and the first output end of an auxiliary system, and the auxiliary system is communicatively connected to the BAU.

[0007] In the redundant emergency stop control system as described above, optionally, the redundant emergency stop control system also includes: a backup relay and a second conductive circuit; the backup relay has a backup relay coil and a backup relay contact, the first end of the backup relay coil is connected to one end of the power supply, the second end of the backup relay coil is connected to the first end of the second conductive circuit, the first end of the backup relay contact is connected to the control end of the electric operating mechanism of the switch, and the second end of the backup relay contact is connected to the first end of the second conductive circuit; the second end of the second conductive circuit is respectively connected to the second output end of the BAU and the second output end of the auxiliary system.

[0008] In the redundant emergency stop control system as described above, optionally, the relay contact is a relay main contact, the relay also has a relay auxiliary contact, and the redundant emergency stop control system also includes: a third conductive circuit; the first end of the relay auxiliary contact is connected to the control end of the switch that controls the electric operating mechanism, and the second end of the relay auxiliary contact is connected to the first end of the third conductive circuit; the second end of the third conductive circuit is connected to the first input end of the BAU and / or the first input end of the auxiliary system.

[0009] In the redundant emergency stop control system as described above, optionally, when the redundant emergency stop control system further includes: a backup relay and a second conductive circuit; the backup relay contact is a backup relay main contact, and the backup relay also has a backup relay auxiliary contact; the first end of the backup relay auxiliary contact is connected to the control end of the switch that controls the electric operating mechanism, and the second end of the relay auxiliary contact is connected to the first end of the third conductive circuit.

[0010] In the redundant emergency stop control system as described above, optionally, the redundant emergency stop control system also includes: an emergency stop button, a first end of the emergency stop button is connected to the second end of the power supply, and a second end of the emergency stop button is connected to a control end of the switch that controls the electric operating mechanism.

[0011] In the redundant emergency stop control system as described above, optionally, the auxiliary system is one or more of a fire protection system, a ventilation system, a thermal management system, a lighting system, an audio monitoring system, a video monitoring system, dynamic environment equipment, and a high-voltage box.

[0012] In the redundant emergency stop control system as described above, optionally, the first end of the power supply is a negative pole, the second end of the power supply is a positive pole, and the second end of the power supply is connected to the BAU and the auxiliary system.

[0013] On the other hand, an energy storage power station is also provided, which includes: an energy storage unit, the energy storage unit having: a prefabricated energy storage cabin; an emergency stop control system, the emergency stop control system is the above-mentioned redundant emergency stop control system for the prefabricated energy storage cabin; an energy storage inverter, a switch including an electric operating mechanism is connected to the prefabricated energy storage cabin.

[0014] In the energy storage power station as described above, there are multiple energy storage units, and a local area network is formed between the multiple energy storage units through switches.

[0015] In the energy storage power station as described above, a switch is configured for each energy storage unit; the BAU of the energy storage unit sends out an emergency stop message in the form of a broadcast, and the emergency stop message is used to indicate that the switch is disconnected.

[0016] The beneficial effects of the technical solution provided by the embodiment of the utility model are:

[0017] By setting a relay and a first conductive circuit; connecting the first end of the relay coil to one end of the power supply, connecting the second end of the relay coil to the first end of the first conductive circuit, connecting the first end of the relay contact to the control end of the control electric operating mechanism of the switch, and connecting the second end of the relay contact to the first end of the first conductive circuit; and connecting the second end of the first conductive circuit to the first output end of the battery system management unit and the first output end of the auxiliary system, respectively, thereby improving the safety protection of the energy storage prefabricated cabin when an emergency stop is required. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the connection between a prefabricated energy storage cabin, a PCS and a switch provided in the prior art;

[0019] Figure 2 A connection diagram of a redundant emergency stop control system for a prefabricated energy storage cabin provided in an embodiment of the utility model;

[0020] Figure 3 A connection diagram of an energy storage power station provided by an embodiment of the utility model;

[0021] Figure 4 A schematic diagram of the layout of an energy storage power station provided by an embodiment of the utility model;

[0022] The symbols in the figure are explained as follows:

[0023] 10 first conductive circuit, 20 second conductive circuit, 30 third conductive circuit, 40 main relay,

[0024] 400 main relay coil, 401 main relay main contact, 402 main relay auxiliary contact, 50 spare relay, 500 spare relay coil, 501 spare relay main contact, 502 spare relay auxiliary contact, 60 switch, 70 emergency stop button, 80 power supply. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0026] In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention. The terms "connected", "connected" and "set" used in the present invention should be understood in a broad sense. For example, they can be fixedly connected or detachably connected; they can be directly connected or indirectly connected through an intermediate component; for ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0027] See also Figure 1 The energy storage prefabricated cabin is connected to the energy storage converter (Power Conversion System, PCS) through a switch 60, which has an electric operating mechanism. When it is necessary to disconnect the connection between the energy storage prefabricated cabin and the PCS, for example, when a safety problem occurs in the energy storage prefabricated cabin, the electric operating mechanism of the switch 60 is controlled to perform a disconnection action. In order to make the electric operating mechanism of the switch 60 perform a disconnection action, see Figure 2 An embodiment of the present invention provides a redundant emergency stop control system for a prefabricated energy storage cabin, which includes: a relay (hereinafter referred to as the main relay) 40 and a first conductive circuit 10.

[0028] The relay has a relay coil (hereinafter referred to as the main relay coil) 400 and a relay contact (hereinafter referred to as the main relay contact) 401. The first end of the relay coil 400 is connected to one end of the power supply 80, and the second end of the relay coil 400 is connected to the first end of the first conductive line 10. The first end of the relay contact 401 is connected to the control end (such as the control end) of the switch 60. Figure 2 The control end is connected to the digital input DI end of the battery system management unit BAU, and the control end is used to control the electric operating mechanism of the switch 60 to perform the cut-off action. The second end of the relay contact 401 is connected to the first end of the first conductive line 10. The second end of the first conductive line 10 is connected to the first output end (such as Figure 2The digital output DO terminal of BAu in the figure is also connected to the first output terminal of the auxiliary system (such as Figure 2 The auxiliary system is connected to the BAU in communication to send the equipment status information collected by the auxiliary system to the BAU. The first output terminal of the BAU and the first output terminal of the auxiliary system are both used to output a switch control signal, which is used to instruct the electric operating mechanism of the switch 60 to perform a cut-off action. In practical applications, the switch control signal can be a high level, and this embodiment does not limit its specific form. The auxiliary system is an auxiliary system for the energy storage prefabricated cabin, which can be one or more of a fire protection system, a ventilation system, a thermal management system, a lighting system, an audio monitoring system, a video monitoring system, a dynamic environment equipment, and a high-voltage box. The dynamic environment equipment can be: electric meters, water immersion, dehumidification, access control and other equipment.

[0029] When it is necessary to disconnect the connection between the energy storage prefabricated cabin and the PCS, for example, after the BAU receives the monitoring information sent by the auxiliary system (such as the battery temperature of the energy storage prefabricated cabin exceeds the preset threshold, that is, the temperature is too high), it is determined that an emergency stop is required, and a switch control signal is output through the first output end of the BAU, so that the first conductive circuit 10, the relay coil 400, and one end of the power supply 80 are connected. At this time, current flows through the relay coil 400, that is, the relay coil 400 is energized, and then the relay contact 401 is controlled to close. Since the second end of the relay contact 401 is also connected to the first output end of the BAU through the first conductive circuit 10, after the relay contact 401 is closed, the control end of the switch 60, the relay contact 402, the first conductive circuit 10, and the first output end of the BAU are connected, and the control end of the switch 60 will receive the switch control signal, and the electric operating mechanism of the switch 60 performs a disconnection operation, thereby realizing the disconnection of the connection between the energy storage prefabricated cabin and the PCS, that is, a redundant design is added.

[0030] In order to better perform safety protection, the first output terminal of the auxiliary system is also used to output a switch control signal, which is connected to the second end of the relay coil 400 and the second end of the relay contact 401 respectively through the first conductive line 10. If a communication failure occurs between the auxiliary system and the BAU, the auxiliary system fails to send monitoring information to the BAU. When the battery temperature of the energy storage prefabricated cabin exceeds the preset threshold, the BAU will not output a switch control signal. At this time, the first output terminal of the auxiliary system outputs a switch control signal, so that when the BAU control switch fails, the electric operating mechanism of the switch can perform a disconnection operation, meeting the need for emergency stop and avoiding drastic changes in unsafe conditions.

[0031] In order to better perform safety protection, the aforementioned relay is referred to as a main relay, and the redundant emergency stop control system also includes: a backup relay 50 and a second conductive circuit 20. The backup relay 50 has a backup relay coil 500 and a backup relay contact (hereinafter referred to as the backup relay main contact) 501. The first end of the backup relay coil 500 is connected to one end of the power supply 80, the second end of the backup relay coil 500 is connected to the first end of the second conductive circuit 20, the first end of the backup relay contact 501 is connected to the control end of the control electric operating mechanism of the switch 60, and the second end of the backup relay contact 501 is connected to the first end of the second conductive circuit 20. The second end of the second conductive circuit 20 is respectively connected to the second output end (such as the main contact of the backup relay) of the BAU. Figure 2 The other DO terminal of BAU in the middle) and the second output terminal of the auxiliary system (such as Figure 2 Through such a design, redundant backup of the redundant emergency stop control system is realized. When a failure occurs, the backup plan can be executed, which can effectively avoid the inability to execute the emergency stop when a failure occurs somewhere.

[0032] When the main relay 40 fails, in order to accurately determine the failure, the relay contact is the main relay contact, and the relay also has a relay auxiliary contact 402. The redundant emergency stop control system also includes: a third conductive circuit 30. Specifically, the first end of the relay auxiliary contact 402 is connected to the control end of the control electric operating mechanism of the switch 60, the second end of the relay auxiliary contact 402 is connected to the first end of the third conductive circuit 30, and the second end of the third conductive circuit 30 is connected to the first input end of the BAU (such as Figure 2 or the first input terminal of the auxiliary system (such as Figure 2 The first input terminal is connected to the DI terminal of the fire fighting system in the middle, or is connected to both the first input terminal of the BAU and the first input terminal of the auxiliary system, so that after the main relay 40 is closed, the closing feedback signal of the main relay 40 can be received, so the first input terminal can be called the feedback signal input terminal. If the feedback signal of the main relay 40 is not received, it is considered that the main relay 40 is failed.

[0033] When the standby relay fails, in order to accurately determine the failure, the standby relay contact is the standby relay main contact 501, and the standby relay also has a standby relay auxiliary contact 502. The first end of the standby relay auxiliary contact 502 is connected to the control end of the control electric operating mechanism of the switch 60, and the second end of the relay auxiliary contact 502 is connected to the first end of the third conductive circuit 30. The second end of the third conductive circuit 30 is connected to the first input end of the BAU, or to the first input end of the auxiliary system, or to both the first input end of the BAU and the first input end of the auxiliary system, so that after the standby relay 50 is closed, the closing feedback signal of the standby relay 50 can be received. If the feedback signal of the standby relay 50 closing is not received, it is considered that the standby relay has failed.

[0034] The redundant emergency stop control system further includes an emergency stop button 70. A first end of the emergency stop button 70 is connected to a second end of the power supply 80, and a second end of the emergency stop button 70 is connected to a control end of a control electric operating mechanism of the switch 60. When the emergency stop button 70 is pressed, the control end of the switch 60 directly receives an action signal, and the electric operating mechanism performs a disconnection action to achieve an emergency stop.

[0035] The switch 60 has an open state output terminal (such as Figure 2 The DO terminal of the middle switch is connected to the second input terminal of the BAU, so that the BAU can understand the state of the switch, whether it is an open state or a closed state.

[0036] The power supply 80 is used to supply power to the BAU and the auxiliary system. The first end of the power supply 80 is a negative electrode, the second end of the power supply 80 is a positive electrode, and the second end of the power supply 80 is connected to the BAU and the auxiliary system respectively. The power supply 80 can be a power supply with a UPS (Uninterruptible Power Supply) function, so as to ensure the stability of the redundant emergency stop control system in an emergency.

[0037] See also Figure 3-4 , the embodiment of the utility model also provides an energy storage power station, which includes: an energy storage unit, the energy storage unit has: an energy storage prefabricated cabin, an emergency stop control system and an energy storage inverter. The emergency stop control system is the aforementioned redundant emergency stop control system for the energy storage prefabricated cabin. A switch including an electric operating mechanism is connected between the energy storage inverter and the energy storage prefabricated cabin. In practical applications, the emergency stop control system can be set in the energy storage prefabricated cabin. The PCS can be set separately, or the PCS can be integrated with the boosting equipment, which is called a PCS boosting integrated cabin. This embodiment does not limit the setting method of the PCS.

[0038] There are multiple energy storage units, and multiple energy storage units are connected to form a local area network through switches. A switch is configured for each energy storage unit, and each energy storage unit will not interfere with each other, thereby improving the stability and efficiency of the network. The BAU of the energy storage unit sends out emergency stop information in the form of broadcast, that is, a broadcast mechanism is adopted. The emergency stop information is used to indicate that the switch is disconnected. Since each energy storage unit realizes a local area network connection through a switch, each energy storage unit can obtain the emergency stop information in time, shortening the transmission time, and there is no need to forward it through the management platform located at the management end. For example: EMS (Energy Management System) can enable the energy storage unit to obtain the status of the adjacent energy storage unit in the first time and take precautions in advance. Each energy storage unit can judge whether it needs to perform emergency stop control based on this information. If the distance to the energy storage unit is within the preset range, emergency stop control is performed.

[0039] The specific usage of this embodiment is described below:

[0040] The redundant emergency stop control system is equipped with two control relays: one is the main relay and the other is the standby relay. Each relay is equipped with two relay contacts, one is the main contact, and the signal passing through is the switch control signal; the other is the auxiliary contact, and the signal passing through is the relay feedback signal. When current flows through the relay coil, the two contacts on the relay will be controlled to close. When and only when the main contact and the auxiliary contact are closed, the signal passing through the main contact will be transmitted to the feedback signal input (first input terminal) of the BAU and the auxiliary system through the auxiliary contact, so as to determine whether the relay is invalid. When the BAU controls the main relay to close, if it does not receive the feedback signal from the auxiliary contact of the main relay, it is determined that the main relay is invalid, and the standby relay can continue to be controlled to close. When the auxiliary system does not receive the feedback signal from the BAU, it is determined that the communication between the auxiliary system and the BAU fails. The auxiliary system can directly control the main relay to close. When the auxiliary system does not receive the auxiliary contact feedback signal from the main relay, it can be determined that the main relay is invalid and the standby relay can continue to be controlled to close. The switch is located between the energy storage prefabricated cabin and the PCS high-voltage connection. The switch is equipped with an electric operating mechanism (or electric operator). The electric operator can control the disconnection of the switch through signals. When the electric operator performs the disconnection action, it will feedback the signal to the BAU, and the BAU will be informed.

[0041] After receiving the disconnection operation signal from the switch, BAU will broadcast through Ethernet with the IP address 255.255.255.255, broadcasting that its switch has been disconnected, along with its own location coordinates and device status. Figure 3 The adjacent energy storage prefabricated cabin will receive the broadcast information immediately through the connection diagram. Through this information, it can be further determined whether it is necessary to disconnect the switch.

[0042] For example: When Figure 4 When a PACK battery pack in the 3-2# ​​energy storage prefabricated cabin experiences thermal runaway, the BAU collects information about the battery temperature being too high and determines that an emergency stop is required. After controlling the main relay to close, it does not receive a relay auxiliary contact feedback signal. It continues to control the backup relay to close and receives a relay auxiliary contact feedback signal. After the switch is disconnected, the BAU receives a switch disconnection feedback signal. At this time, the BAU broadcasts its own disconnected switch and position coordinates (6,5) and battery thermal runaway information through Ethernet with an IP address of 255.255.255.255. After receiving the broadcast information, the adjacent 3-1# energy storage prefabricated cabin determines that it needs to disconnect the switch because it is too close, thereby preventing other situations caused by the spread of thermal runaway in advance.

[0043] It is known from common technical knowledge that the present invention can be implemented by other embodiments that do not deviate from its spirit or essential features. Therefore, the embodiments disclosed above are only illustrative in all respects and are not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are included in the present invention.

Claims

1. A redundant emergency stop control system for an energy storage prefabricated cabin, wherein a switch including an electric operating mechanism is connected between the energy storage prefabricated cabin and the energy storage converter, characterized in that: The redundant emergency stop control system comprises: a relay and a first conductive circuit; The relay comprises a relay coil and a relay contact, wherein a first end of the relay coil is connected to one end of a power supply, a second end of the relay coil is connected to a first end of the first conductive circuit, a first end of the relay contact is connected to a control end of the switch for controlling the electric operating mechanism, and a second end of the relay contact is connected to a first end of the first conductive circuit; The second end of the first conductive line is respectively connected to a first output end of a battery system management unit BAU and a first output end of an auxiliary system that is communicatively connected to the BAU.

2. The redundant emergency stop control system according to claim 1, characterized in that: The redundant emergency stop control system further comprises: a backup relay and a second conductive circuit; The standby relay comprises a standby relay coil and a standby relay contact, wherein a first end of the standby relay coil is connected to one end of a power supply, a second end of the standby relay coil is connected to a first end of the second conductive circuit, a first end of the standby relay contact is connected to a control end of the switch that controls the electric operating mechanism, and a second end of the standby relay contact is connected to a first end of the second conductive circuit; The second end of the second conductive line is connected to the second output end of the BAU and the second output end of the auxiliary system respectively.

3. The redundant emergency stop control system according to claim 1 or 2, characterized in that: The relay contact is a relay main contact, the relay also has a relay auxiliary contact, and the redundant emergency stop control system further includes: a third conductive circuit; The first end of the relay auxiliary contact is connected to the control end of the switch that controls the electric operating mechanism, and the second end of the relay auxiliary contact is connected to the first end of the third conductive circuit; The second end of the third conductive line is connected to the first input end of the BAU and / or the first input end of the auxiliary system.

4. The redundant emergency stop control system according to claim 3, characterized in that: When the redundant emergency stop control system further comprises: a backup relay and a second conductive circuit; The standby relay contact is a standby relay main contact, and the standby relay also has a standby relay auxiliary contact; The first end of the auxiliary contact of the standby relay is connected to the control end of the switch that controls the electric operating mechanism, and the second end of the auxiliary contact of the relay is connected to the first end of the third conductive circuit.

5. The redundant emergency stop control system according to claim 1 or 2, characterized in that: The redundant emergency stop control system also includes: An emergency stop button, wherein a first end of the emergency stop button is connected to a second end of the power supply, and a second end of the emergency stop button is connected to a control end of the switch that controls the electric operating mechanism.

6. The redundant emergency stop control system according to claim 1 or 2, characterized in that: The auxiliary system is one or more of a fire protection system, a ventilation system, a thermal management system, a lighting system, an audio monitoring system, a video monitoring system, dynamic environment equipment, and a high-voltage box.

7. The redundant emergency stop control system according to claim 1 or 2, characterized in that: The first end of the power supply is a negative pole, the second end of the power supply is a positive pole, and the second end of the power supply is connected to the BAU and the auxiliary system.

8. An energy storage power station, characterized in that: The energy storage power station comprises: an energy storage unit, wherein the energy storage unit has: Prefabricated energy storage cabin; An emergency stop control system, wherein the emergency stop control system is a redundant emergency stop control system for the energy storage prefabricated cabin according to any one of claims 1 to 7; The energy storage converter is connected to the energy storage prefabricated cabin with a switch including an electric operating mechanism.

9. The energy storage power station according to claim 8, characterized in that: There are multiple energy storage units, and a local area network is formed between the multiple energy storage units through switches.

10. The energy storage power station according to claim 9, characterized in that: A switch is configured for each energy storage unit; The BAU of the energy storage unit sends out an emergency stop message in the form of a broadcast, and the emergency stop message is used to indicate that the switch is disconnected.

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