CN115333247A - Energy storage battery system and safety control method - Google Patents
Energy storage battery system and safety control method Download PDFInfo
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- CN115333247A CN115333247A CN202210921633.0A CN202210921633A CN115333247A CN 115333247 A CN115333247 A CN 115333247A CN 202210921633 A CN202210921633 A CN 202210921633A CN 115333247 A CN115333247 A CN 115333247A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J15/00—Systems for storing electric energy
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/18—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteries; for accumulators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
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- Engineering & Computer Science (AREA)
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
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Abstract
The invention provides an energy storage battery system and a safety control method, wherein the energy storage battery system comprises a plurality of battery clusters, a battery management system, an energy storage converter, a convergence protection device and a system emergency signal device; the bus protection device comprises a total positive bus, a total negative bus and a direct current breaker, wherein the total positive bus and the total negative bus of the bus protection device are respectively connected with the plurality of battery clusters, and the bus protection device is also connected with the energy storage converter; the battery management system comprises a detection control unit, wherein the detection control unit is respectively connected with the battery cluster and the direct current breaker and is configured to acquire battery cluster state information, compare the battery cluster state information with a preset threshold value and control the on-off of the direct current breaker according to a comparison result; the system emergency signal device is connected with the direct current breaker to control the on-off of the direct current breaker. The invention can automatically disconnect the direct current main loop, can quickly and reliably exit from the charging and discharging state, and reduces the safety risk.
Description
Technical Field
The invention relates to the technical field of energy storage systems, in particular to an energy storage battery system and a safety control method.
Background
At present, in the energy storage industry, a lithium ion battery becomes a very important novel energy storage medium due to the characteristics of high energy density, long cycle life and the like, and is widely applied to large-scale energy storage scenes such as renewable energy power generation and energy storage matching of wind power, photovoltaic and the like, power grid peak regulation and frequency modulation, industrial and commercial peak-valley profit sharing and the like.
As shown in fig. 1, the conventional energy storage battery system includes a Battery Management System (BMS), an energy storage converter (PCS), and an Energy Management System (EMS). The Battery Management System (BMS) collects battery information and uploads the battery information to the Energy Management System (EMS), and the Energy Management System (EMS) sends an instruction to the energy storage converter (PCS) to control charging and discharging according to the battery state and the formulated strategy. When a safety fault occurs, the Battery Management System (BMS) can upload fault information to the Energy Management System (EMS) and the energy storage converter (PCS), so that the Energy Management System (EMS) and the energy storage converter (PCS) execute protection actions.
However, in the energy storage battery system, a large number of single batteries are connected in series-parallel to form a plurality of high voltages and large currents, and when a safety fault occurs in the charging and discharging process of the system, the system relies on multi-layer information transmission and processing among devices until the final protection action of the energy storage converter (PCS) is completed, and the system may cause damage to the devices such as a Battery Management System (BMS) and a battery or even cause greater danger due to untimely response.
Disclosure of Invention
In view of the above, an object of the present invention is to provide an energy storage battery system and a safety control method, so as to solve the problem that the energy storage battery system in the prior art does not respond in time when a safety failure occurs.
The embodiment of the invention provides an energy storage battery system, which comprises a plurality of battery clusters, a battery management system, an energy storage converter, a convergence protection device and a system emergency signal device, wherein the battery clusters are connected with the energy management system; the bus protection device comprises a total positive bus bar, a total negative bus bar and a direct current breaker, wherein the total positive bus bar and the total negative bus bar of the bus protection device are respectively connected with the plurality of battery clusters, and the bus protection device is also connected with the energy storage converter; the battery management system comprises a detection control unit, wherein the detection control unit is respectively connected with the battery cluster and the direct current circuit breaker and is configured to collect battery cluster state information, compare the battery cluster state information with a preset threshold value and control the on-off of the direct current circuit breaker according to a comparison result; the system emergency signal device is connected with the direct current circuit breaker and controls the on-off of the direct current circuit breaker.
Specifically, the detection control unit is connected with a first contact of the direct current circuit breaker through a first dry contact; the system emergency signal device is connected with a second contact of the direct current circuit breaker through a second main contact.
Specifically, the system emergency signal device is connected with a trigger end of the detection control unit.
Specifically, the detection control unit is respectively connected with the energy management system and the energy storage converter.
Specifically, the system emergency signal device is connected with the energy storage converter.
Specifically, the energy storage battery system further comprises an auxiliary power supply device, and the system emergency signal device is connected with the auxiliary power supply device.
Specifically, the system emergency signal device comprises a relay, a control circuit of the relay is respectively connected with an emergency stop button signal generating device, a water immersion system alarm signal device and a fire protection system alarm signal device, and the relay is connected with the direct current circuit breaker.
The embodiment of the invention also provides a safety control method of an energy storage system, wherein the energy storage battery system comprises a plurality of battery clusters, a battery management system, an energy storage converter, a confluence protection device and a system emergency signal device, the confluence protection device comprises a total positive busbar, a total negative busbar and a direct current breaker, the total positive busbar and the total negative busbar of the confluence protection device are respectively connected with the plurality of battery clusters, and the confluence protection device is also connected with the energy storage converter; the battery management system comprises a detection control unit, the detection control unit is respectively connected with the battery cluster and the direct current circuit breaker, the system emergency signal device is connected with the direct current circuit breaker, and the safety control method comprises the following steps: the battery management system detects and judges whether to execute a protection action through the detection control unit; if the judgment is carried out, controlling the confluence protection device to carry out protection action; and the system emergency signal device controls the confluence protection device to execute protection action according to the fault signal.
Specifically, the step of the battery management system detecting and judging whether to execute the protection action through the detection control unit (210) further comprises: if the battery pack is judged not to be executed, informing the energy management system and the energy storage converter of the state information of the battery pack in real time, and recording events by the energy management system and the energy storage converter; if the judgment is carried out, fault information is uploaded to the energy management system and the energy storage converter, the energy management system and the energy storage converter correspondingly carry out protection actions, and the battery management system carries out self-protection actions.
Specifically, the system emergency signal device controls the bus protection device to execute the protection action according to the fault signal, and the method further comprises the following steps: the system emergency signal device is connected with the battery management system and informs the battery management system to execute a protection action according to a fault signal, and/or the system emergency signal device is connected with the energy storage converter and informs the energy storage converter to execute the protection action according to the fault signal, and/or the system emergency signal device is connected with the auxiliary power supply equipment and controls the main idle switch of the auxiliary power supply equipment to be switched off according to the fault signal so as to disconnect the power supply loop.
The energy storage battery system and the safety control method provided by the invention can automatically disconnect the direct current main loop, avoid the damage and danger of the charging and discharging of the system to the battery management system, the battery and other equipment in the case of safety failure, can quickly and reliably quit the charging and discharging state, and reduce the safety risk.
Drawings
Fig. 1 is a schematic connection diagram of a conventional energy storage battery system.
Fig. 2 is a schematic connection diagram of an energy storage battery system according to a first embodiment of the invention.
Fig. 3 is a schematic connection diagram of an energy storage battery system according to a second embodiment of the invention.
Fig. 4 is a flowchart of a safety control method for an energy storage battery system according to a third embodiment of the invention.
Fig. 5 is a flowchart of a safety control method for an energy storage battery system according to a fourth embodiment of the invention.
Detailed Description
To further illustrate the technical means and effects of the present invention for achieving the intended purpose, the following detailed description of embodiments, methods, steps, structures, features and effects of the energy storage battery system and the safety control method according to the present invention will be made with reference to the accompanying drawings and preferred embodiments.
The foregoing and other aspects, features and advantages of the invention will be apparent from the following more particular description of preferred embodiments, as illustrated in the accompanying drawings. While the invention has been described in connection with specific embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention.
First embodiment
Referring to fig. 2, fig. 2 is a connection diagram of an energy storage battery system according to a first embodiment of the invention. The energy storage battery system of the embodiment includes a plurality of battery clusters 100, a battery management system 200, an energy management system 300 and an energy storage converter 400, and further includes a confluence protection device 500 and a system emergency signal device 600; the bus protection device 500 comprises a total positive bus, a total negative bus and a direct current breaker 510, wherein the total positive bus and the total negative bus of the bus protection device 500 are respectively connected with the plurality of battery clusters 100, and the bus protection device 500 is further connected with the energy storage converter 400; the battery management system 200 comprises a detection control unit 210, wherein the detection control unit 210 is respectively connected with the battery cluster 100 and the direct current breaker 510 and is configured to collect the battery cluster state information, compare the battery cluster state information with a preset threshold value and control the on-off of the direct current breaker 510 according to the comparison result; the system emergency signal device 600 is connected to the dc breaker 510 to control the on/off of the dc breaker 510.
In an embodiment of the present invention, the detection control unit 210 is connected to a first contact of the dc breaker 510 through a first dry contact; the system emergency signal device 600 is connected to a second contact of the dc breaker 510 via a second dry contact. Through the connection in a dry contact mode, the system can respond quickly and reliably when a safety failure occurs.
In an embodiment of the present invention, the first contact and the second contact of the dc breaker 510 are normally open contacts, and are respectively connected to the control circuit of the dc breaker 510.
In an embodiment of the present invention, the battery cluster 100 may include a plurality of batteries connected in series and parallel, and the total positive interface and the total negative interface of the battery cluster 100 are sequentially connected to the battery management system 200 and the bus protection device 500, respectively. In one embodiment, the total positive interface of the battery cluster 100 is connected to the total positive bus bar of the bus protection device 500, and the total negative interface of the battery cluster 100 is connected to the total negative bus bar of the bus protection device 500.
In an embodiment of the present invention, the system emergency signal device 600 is connected to the energy storage converter 400, and notifies the energy storage converter 400 to perform a protection action when a peripheral safety failure occurs. In one embodiment, the system emergency signal device 600 is connected to the energy storage converter 400 via a dry contact.
In an embodiment of the present invention, the battery management system 200 may be connected to the battery cluster 100 through a CAN bus. In an embodiment of the present invention, the battery management system 200 may be connected to the energy storage converter 400 through a CAN bus or a Modbus. In an embodiment of the invention, the battery management system 200 may be connected to the energy management system 300 through a Modbus. In an embodiment of the present invention, the energy management system 300 may be connected to the energy storage converter 400 through a Modbus.
Specifically, as shown in fig. 2, the connections in the energy storage battery system of the present embodiment include power connections and communication connections. When the dc breaker 510 is turned on, the battery cluster 100 may be electrically connected to the energy storage converter 400 through the battery management system 200 and the total positive bus bar and the total negative bus bar of the bus protection device 500 for energy transfer of charging and discharging. From the communication connection, the battery management system 200 may be connected to the battery cluster 100, the junction protection device 500, the energy management system 300 and the energy storage converter 400, respectively, the energy management system 300 may also be connected to the energy storage converter 400, and the system emergency signal device 600 may be connected to the junction protection device 500, and may also be connected to the battery management system 200, the energy storage converter 400 and the auxiliary power supply device 700, respectively.
When a safety failure occurs, if the safety failure is related to a battery factor, the safety failure may be set as an internal safety failure. The detection control unit 210 collects battery cluster state information, such as a voltage value, a current value, a temperature value, and the like of the battery, compares the battery cluster state information with a preset threshold value, for example, compares the voltage value in the battery cluster state information with the preset voltage threshold value, or compares the current value in the battery cluster state information with the preset current threshold value, or compares the temperature value in the battery cluster state information with the preset temperature value, and the like, and controls the on/off of the dc breaker 510 according to a comparison result to prevent the occurrence of over-charging/discharging of the battery, over-voltage or over-current flowing through the battery, over-high temperature of the battery, and the like. Therefore, when an internal safety fault occurs, the energy storage battery system can automatically disconnect the direct current main loop, the damage and danger of system charging and discharging to the battery management system 200, the battery and other equipment are avoided, the charging and discharging state can be rapidly and reliably exited, and the safety risk is reduced.
When a safety failure occurs, if the safety failure is related to a non-battery related factor such as sudden stop, flooding, fire, or the like, the safety failure may be set as a peripheral safety failure. The system emergency signal device 600 may be connected to the emergency stop button signal generating device 620, the water logging system alarm signal device 630, the fire protection system alarm signal device 640, etc. respectively to receive multiple fault signals. The system emergency signal device 600 controls the dc breaker 510 to open when receiving a fault signal of any way. Therefore, when peripheral safety faults occur, the energy storage battery system can automatically disconnect the direct current main loop, damage and danger of system charging and discharging to the battery management system 200, the battery and other equipment are avoided, the charging and discharging state can be rapidly and reliably quitted, and safety risks are reduced.
In an embodiment of the present invention, the detection control unit 210 may be connected to an alarm device, and control whether to generate an internal alarm signal to the alarm device according to the comparison result.
In an embodiment of the present invention, the detection control unit 210 may receive an internal alarm signal sent by the energy management system 300, the energy storage converter 400, or other devices, and operate according to the internal alarm signal, that is, configured to trigger detection and threshold comparison when receiving the internal alarm signal.
In an embodiment of the present invention, the detection control unit 210 is respectively connected to the energy management system 300 and the energy storage converter 400 for communication. In one embodiment, the detected control unit 210 communicates with the energy management system 300 and the energy storage converter 400 through dry contacts, respectively. The detection control unit 210 may compare the battery cluster state information with a preset threshold, and control the on/off of the dc breaker 510 according to the comparison result, and at the same time, the detection control unit 210 may also control whether the energy management system 300 and the energy storage converter 400 execute a protection action according to the comparison result.
In an embodiment of the present invention, the detection control unit 210 may be further configured to compare the battery cluster state information with a preset threshold, and select to notify the energy management system 300 and the energy storage converter 400 of the battery cluster state information in real time according to the comparison result, or select to notify the energy management system 300 and the energy storage converter 400 to perform a protection action. Thus, the severity of the safety fault can be determined by threshold comparison, and different communications can be selected.
In an embodiment of the present invention, the energy storage converter 400 further includes a grid access terminal to connect to a grid.
In an embodiment of the present invention, the energy storage battery system further includes an auxiliary power supply 700, and the system emergency signal device 600 is connected to the auxiliary power supply 700. In one embodiment, the system emergency signal device 600 may be connected to the auxiliary power unit 700 through a dry contact. Specifically, when receiving the fault signal, the system emergency signal device 600 not only controls the dc circuit breaker 510 to be turned off, but also controls the auxiliary power supply device 700 to open the main air switch of the auxiliary power supply device 700, so as to disconnect the power supply loop and cut off the connection of the power grid, thereby improving the safety of the system.
Second embodiment
Referring to fig. 3, fig. 3 is a connection diagram of an energy storage battery system according to a second embodiment of the invention. The present embodiment provides an energy storage battery system, the basic structure and principle thereof and the generated technical effects are the same as those of the first embodiment, and for the sake of brief description, no part of the present embodiment is mentioned, and reference may be made to the corresponding contents in the first embodiment. In this embodiment, in an energy storage battery system, the system emergency signal device 600 includes a relay 610, a control circuit of the relay 610 is respectively connected to the emergency stop button signal generating device 620, the water immersion system alarm signal device 630 and the fire protection system alarm signal device 640, and the relay 610 is connected to the dc breaker 510.
However, the control circuit of the relay 610 according to the embodiment of the present invention is not limited to be connected to the emergency stop button signal generating device 620, the water logging system alarm signal device 630, and the fire protection system alarm signal device 640, but may also be connected to other signal generating devices or alarm signal devices, etc. to implement reliable collection of multiple fault signals, and the corresponding technical solutions all belong to the protection scope of the present invention.
In one embodiment of the present invention, the control circuit of the relay 610 includes a first normally closed dry contact, a second normally closed dry contact and a third normally closed dry contact; the first normally closed dry contact is connected with an emergency stop button signal generating device 620, the second normally closed dry contact is connected with a water logging system alarm signal device 630, the third normally closed dry contact is connected with a fire protection system alarm signal device 640, and the first normally closed dry contact, the second normally closed dry contact and the third normally closed dry contact are connected in series in a normally closed loop.
Specifically, when any one of the emergency stop button signal generating device 620, the water immersion system alarm signal device 630 and the fire protection system alarm signal device 640 detects that a fault signal is sent out, the switch unit corresponding to the corresponding normally closed dry contact in the first normally closed dry contact, the second normally closed dry contact and the third normally closed dry contact is turned off, so that the control circuit of the relay 610 is in an off state, and the relay 610 outputs a dry contact signal to the direct current circuit breaker 510 in the confluence protection device 500 to control the direct current circuit breaker 510 to be turned off.
Third embodiment
Referring to fig. 4, fig. 4 is a flowchart illustrating a safety control method of an energy storage battery system according to a third embodiment of the invention. Please refer to fig. 2, fig. 3 and fig. 4 simultaneously.
Based on the same inventive concept, the embodiment of the present invention further provides a safety control method for an energy storage battery system, where the energy storage battery system includes a plurality of battery clusters 100, a battery management system 200, an energy management system 300, an energy storage converter 400, a bus protection device 500, and a system emergency signal device 600, the bus protection device 500 includes a total positive bus bar, a total negative bus bar, and a dc breaker 510, the total positive bus bar and the total negative bus bar of the bus protection device 500 are respectively connected to the plurality of battery clusters 100, and the bus protection device 500 is further connected to the energy storage converter 400; the battery management system 200 comprises a detection control unit 210, the detection control unit 210 is respectively connected with the battery cluster 100 and the direct current breaker 510, the system emergency signal device 600 is connected with the direct current breaker 510, and the safety control method comprises the following steps:
s1, the battery management system 200 detects and judges whether to execute a protection action through a detection control unit 210; if the judgment is executed, the bus protection device 500 is controlled to execute the protection action.
In an embodiment of the present invention, the steps of the battery management system 200 detecting and determining whether to execute the protection action include: collecting battery cluster state information, comparing the battery cluster state information with a preset threshold value, and judging whether to execute a protection action according to a comparison result.
Specifically, the battery management system 200 may collect the battery cluster state information, such as a voltage value, a current value, a temperature value, and the like of the battery, detect and determine whether to perform the protection action, compare the battery cluster state information with a preset threshold, for example, compare the voltage value in the battery cluster state information with the preset voltage threshold, or compare the current value in the battery cluster state information with the preset current threshold, or compare the temperature value in the battery cluster state information with the preset temperature value, and control the confluence protection device 500 to perform the protection action according to the comparison result.
In an embodiment of the present invention, the step of the bus protection device 500 performing the protection operation includes: the opening of the dc breaker 510 is controlled to open the dc main circuit.
And S2, the system emergency signal device 600 controls the confluence protection device 500 to execute protection action according to the fault signal.
Specifically, when a peripheral safety fault, i.e., a safety fault associated with a non-battery related factor such as sudden stop, flooding, fire, etc., occurs, the system emergency signal device 600 receives a corresponding fault signal and controls the confluence protection device 500 to perform a protection action, such as controlling the dc breaker 510 to open to disconnect the dc main circuit.
In an embodiment of the present invention, before the battery management system 200 detects and determines whether to perform the protection action through the detection control unit 210, the method includes the following steps: the battery management system 200 receives the trigger signal, and detects and determines whether to perform a protection action according to the trigger signal. The trigger signal may be from the energy management system 300, the energy storage converter 400, or an emergency signal device, etc. The triggering signal is from the energy management system 300 or the energy storage converter 400, and the like, and can be used for determining that an internal safety fault occurs, and the triggering signal is from the emergency signal device, and can be used for determining that a peripheral safety fault occurs.
It should be noted that, the safety control method of this embodiment does not limit the order of the step S1 and the step S2, for example, when implementing, the step S1 is preferentially executed according to the occurrence of an internal safety failure; the step S2 may be executed preferentially or the step S1 may be executed simultaneously in response to the occurrence of the peripheral safety failure.
Therefore, according to the safety control method of the energy storage battery system of the embodiment, the energy storage battery system can automatically control the confluence protection device 500 to perform a protection action, such as disconnecting the direct current main loop, so that damage and danger to the battery management system 200, the battery and other equipment caused by system charging and discharging during a safety fault are avoided, the charging and discharging state can be rapidly and reliably exited, and the safety risk is reduced.
Fourth embodiment
Referring to fig. 5, fig. 5 is a flowchart illustrating a safety control method of an energy storage battery system according to a fourth embodiment of the invention. The present embodiment provides a safety control method for an energy storage battery system, the principle and the generated technical effects are the same as those of the third embodiment, and for the sake of brief description, no part of the present embodiment is mentioned, and reference may be made to the corresponding contents in the third embodiment.
In an embodiment of the present invention, the step of the battery management system 200 detecting and determining whether to execute the protection action through the detection control unit 210 further includes: if the judgment result shows that the battery is not executed, the battery cluster state information is notified to the energy management system 300 and the energy storage converter 400 in real time, and the energy management system 300 and the energy storage converter 400 record events; if the judgment is carried out, the fault information is uploaded to the energy management system 300 and the energy storage converter 400, the energy management system 300 and the energy storage converter 400 correspondingly carry out protection actions, and the battery management system 200 carries out self-protection actions. Therefore, if a safety fault occurs, the confluence protection device 500, the energy management system 300, the energy storage converter 400 and the battery management system 200 all perform protection actions correspondingly, so that multiple protections can be formed, and the safety of the system is improved.
In an embodiment of the present invention, the system emergency signal device 600 controls the bus protection device 500 to perform the protection operation according to the fault signal further includes: the system emergency signal device 600 is connected to the battery management system 200, and notifies the battery management system 200 to perform a protection operation according to a fault signal. In one embodiment, the battery management system 200 performs the protection action including the steps of: the battery management system 200 detects and determines whether to perform a protection action through the detection control unit 210. The protection action is performed by the battery management system 200, increasing the safety of the system.
In an embodiment of the present invention, the system emergency signal device 600 controls the bus protection device 500 to perform the protection operation according to the fault signal further includes: the system emergency signaling device 600 is connected to the energy storage converter 400 and notifies the energy storage converter 400 to perform a protection action according to the fault signal. The system emergency signal device 600 can inform the energy storage converter 400 to perform a protection action when a peripheral safety failure occurs, thereby increasing the safety of the system. In an embodiment, the step of performing the protection action by the energy storage converter 400 includes: the dc switch in the energy storage converter 400 is opened.
In an embodiment of the present invention, the step of controlling the bus protection device 500 to perform the protection operation by the system emergency signal device 600 according to the fault signal further includes: the system emergency signal device 600 is connected to the auxiliary power supply device 700, and controls the main idle switch of the auxiliary power supply device 700 to be switched off according to the fault signal so as to disconnect the power supply loop, thereby increasing the safety of the system. However, the invention is not limited to this, and the system emergency signal device 600 may also control the action of the hook release according to the fault signal to open the main switch to disconnect the power supply loop, thereby increasing the safety of the system.
In an embodiment of the present invention, the step of controlling the bus protection device to perform the protection operation further includes: the battery management system 200 controls the convergence protection device 500 to execute protection actions through the dry contact; and/or the system emergency signal device 600 controls the bus protection device 500 to perform a protection action through the dry contact. In an embodiment of the present invention, the step of notifying the battery management system 200 to execute the protection action further includes: the system emergency signal device 600 notifies the battery management system 200 to perform a protection operation through the dry contact. In an embodiment of the present invention, the step of notifying the energy storage converter 400 to perform the protection action further includes: the system emergency signal device 600 informs the energy storage converter 400 through the dry contact to perform the protection action. In an embodiment of the present invention, the step of controlling the auxiliary power supply device 700 to open the main switch to disconnect the power supply loop further includes: the system emergency signal device 600 controls the auxiliary power supply device 700 through the dry contact to open the main air switch to disconnect the power supply loop. Through the connection in a dry contact mode, the system can respond quickly and reliably when a safety failure occurs.
In an embodiment of the present invention, before the system emergency signal device 600 controls the bus protection device 500 to perform the protection action according to the fault signal, the method includes the following steps: the system emergency signal device 600 collects a plurality of fault signals. In one embodiment, the fault signal is generated based on an emergency stop button being triggered, a water immersion system alarm, or a fire protection system alarm trigger. Specifically, the system emergency signaling device 600 may collect multiple fault signals, and may be, but not limited to, connected to the emergency stop button signal generating device 620, the water immersion system alarm signaling device 630, the fire protection system alarm signaling device 640, etc. respectively through a dry contact by using the relay 610, so that the emergency stop button is triggered, the water immersion system alarm or the fire protection system alarm, etc. may all send fault signals to the system emergency signaling device 600, and then the system emergency signaling device 600 controls the confluence protection device 500 to perform a protection action, for example, controls the dc breaker 510 to be disconnected, so as to disconnect the dc main circuit.
The energy storage battery system and the safety control method provided by the embodiment of the invention can automatically disconnect the direct current main loop, avoid the damage and danger of the system charge and discharge to equipment such as a battery management system and a battery in the case of safety failure, quickly and reliably exit from the charge and discharge state, and reduce the safety risk.
Although the present invention has been described with reference to the preferred embodiments, it is to be understood that the present invention is not limited to the specific embodiments, and that various changes and modifications may be made by those skilled in the art without departing from the scope of the invention.
Claims (10)
1. An energy storage battery system comprises a plurality of battery clusters (100), a battery management system (200), an energy management system (300) and an energy storage converter (400), and is characterized by further comprising a confluence protection device (500) and a system emergency signal device (600);
the bus bar protection device (500) comprises a total positive bus bar, a total negative bus bar and a direct current breaker (510), the total positive bus bar and the total negative bus bar of the bus bar protection device (500) are respectively connected with the plurality of battery clusters (100), and the bus bar protection device (500) is further connected with the energy storage converter (400);
the battery management system (200) comprises a detection control unit (210), wherein the detection control unit (210) is respectively connected with the battery cluster (100) and the direct current breaker (510), and is configured to collect battery cluster state information, compare the battery cluster state information with a preset threshold value, and control the on-off of the direct current breaker (510) according to a comparison result;
the system emergency signal device (600) is connected with the direct current circuit breaker (510) and controls the on-off of the direct current circuit breaker (510).
2. Energy storage battery system according to claim 1, characterized in that the detection control unit (210) is connected to a first contact of the dc breaker (510) via a first dry contact; the system emergency signal device (600) is connected to a second contact of the dc circuit breaker (510) via a second dry contact.
3. The energy storage battery system according to claim 1, wherein the system emergency signal device (600) is connected to the trigger terminal of the detection control unit (210).
4. The energy storage battery system according to claim 1, characterized in that the detection control unit (210) is connected to the energy management system (300) and the energy storage converter (400), respectively.
5. Energy storage battery system according to claim 1, characterized in that the system emergency signal device (600) is connected to the energy storage converter (400).
6. The energy storage battery system according to claim 1, characterized in that the energy storage battery system further comprises an auxiliary power supply device (700), and the system emergency signal device (600) is connected with the auxiliary power supply device (700).
7. The energy storage battery system according to claim 1, characterized in that the system emergency signal device (600) comprises a relay (610), a control circuit of the relay (610) is respectively connected with an emergency stop button signal generating device (620), a water immersion system alarm signal device (630) and a fire protection system alarm signal device (640), and the relay (610) is connected with the direct current breaker (510).
8. A safety control method of an energy storage battery system is characterized in that the energy storage battery system comprises a plurality of battery clusters (100), a battery management system (200), an energy management system (300), an energy storage converter (400), a bus protection device (500) and a system emergency signal device (600), wherein the bus protection device (500) comprises a total positive bus bar, a total negative bus bar and a direct current breaker (510), the total positive bus bar and the total negative bus bar of the bus protection device (500) are respectively connected with the plurality of battery clusters (100), and the bus protection device (500) is also connected with the energy storage converter (400); the battery management system (200) comprises a detection control unit (210), the detection control unit (210) is respectively connected with the battery cluster (100) and the direct current breaker (510), the system emergency signal device (600) is connected with the direct current breaker (510), and the safety control method comprises the following steps:
the battery management system (200) detects and judges whether to execute a protection action through the detection control unit (210); if the judgment is executed, controlling the confluence protection device (500) to execute protection action;
the system emergency signal device (600) controls the confluence protection device (500) to execute protection action according to the fault signal.
9. The safety control method according to claim 8, wherein the step of the battery management system (200) detecting and determining whether to perform a protection action by the detection control unit (210) further comprises:
if the battery cluster state information is judged not to be executed, informing the energy management system (300) and the energy storage converter (400) of the battery cluster state information in real time, and recording events by the energy management system (300) and the energy storage converter (400);
if the judgment is carried out, the fault information is uploaded to the energy management system (300) and the energy storage converter (400), the energy management system (300) and the energy storage converter (400) correspondingly carry out protection actions, and the battery management system (200) carries out self-protection actions.
10. The safety control method according to claim 8, wherein the system emergency signal device (600) controls the bus protection device (500) to perform the protection action according to the fault signal further comprises the steps of:
the system emergency signal device (600) is connected with the battery management system (200) and informs the battery management system (200) to execute a protection action according to a fault signal, and/or the system emergency signal device (600) is connected with the energy storage converter (400) and informs the energy storage converter (400) to execute the protection action according to the fault signal, and/or the system emergency signal device (600) is connected with the auxiliary power supply equipment (700) and controls the main idle switch of the auxiliary power supply equipment (700) to be switched on according to the fault signal so as to disconnect the power supply loop.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115579930A (en) * | 2022-11-17 | 2023-01-06 | 江苏阿诗特能源科技有限公司 | Safety control system and method for energy storage power station |
| CN116131311A (en) * | 2023-04-07 | 2023-05-16 | 深圳市首航新能源股份有限公司 | Energy storage system and protection method thereof |
| CN116742809A (en) * | 2023-08-08 | 2023-09-12 | 江苏天合储能有限公司 | Energy storage protection device and energy storage battery system |
| CN118539568A (en) * | 2024-07-24 | 2024-08-23 | 福建时代星云科技有限公司 | Battery energy storage system protection circuit and control method thereof |
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2022
- 2022-08-02 CN CN202210921633.0A patent/CN115333247A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115579930A (en) * | 2022-11-17 | 2023-01-06 | 江苏阿诗特能源科技有限公司 | Safety control system and method for energy storage power station |
| CN116131311A (en) * | 2023-04-07 | 2023-05-16 | 深圳市首航新能源股份有限公司 | Energy storage system and protection method thereof |
| CN116742809A (en) * | 2023-08-08 | 2023-09-12 | 江苏天合储能有限公司 | Energy storage protection device and energy storage battery system |
| CN116742809B (en) * | 2023-08-08 | 2023-10-27 | 江苏天合储能有限公司 | Energy storage protection device and energy storage battery system |
| CN118539568A (en) * | 2024-07-24 | 2024-08-23 | 福建时代星云科技有限公司 | Battery energy storage system protection circuit and control method thereof |
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