CN115333247A - An energy storage battery system and safety control method - Google Patents

Abstract

The invention provides an energy storage battery system and a safety control method. The energy storage battery system includes a plurality of battery clusters, a battery management system, an energy management system, an energy storage converter, a confluence protection device and a system emergency signal device; the confluence protection device Including the total positive bus bar, the total negative bus bar and the DC circuit breaker, the total positive bus bar and the total negative bus bar of the bus protection device are respectively connected to multiple battery clusters, and the bus protection device is also connected to the energy storage converter; battery management The system includes a detection and control unit, which is connected to the battery cluster and the DC circuit breaker respectively, and is configured to collect battery cluster status information, compare the battery cluster status information with a preset threshold, and control the DC circuit breaker on and off according to the comparison result; The emergency signal device of the system is connected with the DC circuit breaker to control the on-off of the DC circuit breaker. The invention can automatically disconnect the direct current main circuit, can quickly and reliably exit the charge and discharge state, and reduce safety risks.

Description

An energy storage battery system and safety control method

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 technique

At present, in the energy storage industry, lithium-ion batteries have become a very important new energy storage medium due to their high energy density and long cycle life. Large-scale energy storage scenarios such as frequency modulation and industrial and commercial peak-valley arbitrage.

As shown in Figure 1, the existing energy storage battery system includes a battery management system (BMS), a power storage converter (PCS), and an energy management system (EMS). The battery management system (BMS) collects battery information and uploads it to the energy management system (EMS). The energy management system (EMS) sends instructions to the energy storage converter (PCS) for charge and discharge control according to the battery status and the formulated strategy. When a safety fault occurs, the battery management system (BMS) can upload the 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 protective action.

However, in the energy storage battery system, a large number of single batteries are connected in series and parallel to form multiple high voltages and high currents, and when a safety failure occurs during the charging and discharging process of the system, relying on multi-layer information transmission and processing between devices Until the final protection action of the power storage converter (PCS) is completed, the system may cause damage to the battery management system (BMS), batteries and other equipment due to untimely response, and even cause greater danger.

Contents of the invention

In view of this, the object of the present invention is to provide an energy storage battery system and a safety control method to solve the problem of untimely response of the energy storage battery system in the prior art when a safety failure occurs.

An embodiment of the present invention provides an energy storage battery system. The energy storage battery system includes a plurality of battery clusters, a battery management system, an energy management system, and an energy storage converter, and also includes a confluence protection device and a system emergency signal device; The bus protection device includes a total positive bus bar, a total negative bus bar and a DC circuit breaker. The total positive bus bar and the total negative bus bar of the bus protection device are respectively connected to a plurality of battery clusters, and the bus protection device is also connected to The energy storage converters are connected; the battery management system includes a detection control unit, the detection control unit is respectively connected to the battery cluster and the DC circuit breaker, and is configured to collect state information of the battery cluster, and the The battery cluster state information is compared with a preset threshold, and the switching of the DC circuit breaker is controlled according to the comparison result; the system emergency signal device is connected with the DC circuit breaker to control the switching of the DC circuit breaker.

Specifically, the detection control unit is connected to the first contact of the DC circuit breaker through the first dry contact; the system emergency signal device is connected to the second contact of the DC circuit breaker through the second dry contact.

Specifically, the system emergency signal device is connected to the trigger terminal of the detection control unit.

Specifically, the detection control unit is respectively connected to the energy management system and the energy storage converter.

Specifically, the system emergency signaling device is connected to the energy storage converter.

Specifically, the energy storage battery system further includes auxiliary power supply equipment, and the system emergency signal device is connected to the auxiliary power supply equipment.

Specifically, the system emergency signal device includes a relay, and the control circuit of the relay is respectively connected with the emergency stop button signal generator, the flooding system alarm signal device, and the fire system alarm signal device, and the relay is connected to the DC circuit breaker connected.

An embodiment of the present invention also provides a safety control method for an energy storage system, the energy storage battery system includes a plurality of battery clusters, a battery management system, an energy management system, an energy storage converter, a confluence protection device, and a system emergency signal device, the bus protection device includes a total positive bus bar, a total negative bus bar and a DC circuit breaker, the total positive bus bar and the total negative bus bar of the bus protection device are respectively connected to a plurality of battery clusters, and the bus The protection device is also connected to the energy storage converter; the battery management system includes a detection control unit, the detection control unit is respectively connected to the battery cluster and the DC circuit breaker, and the system emergency signal device is connected to the The above DC circuit breaker is connected, and the safety control method includes: the battery management system detects and judges whether to execute the protection action through the detection control unit; The emergency signal device controls the confluence protection device to perform protection actions 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 includes: if it is judged not to execute, then notifying the energy management system and the battery cluster status information in real time The energy storage converter, the energy management system and the energy storage converter record events; if it is determined to be executed, upload fault information to the energy management system and the energy storage converter, the energy management system and the energy storage converter The energy storage converter correspondingly performs a protection action, and the battery management system performs a self-protection action.

Specifically, the system emergency signal device controlling the confluence protection device to perform protection actions according to the fault signal further includes the step of: the system emergency signal device is connected to the battery management system, and notifies the battery management system according to the fault signal Executing protection actions, and/or the system emergency signal device is connected to the energy storage converter, and notifies the energy storage converter to perform protection actions according to the fault signal, and/or the system emergency signal device is connected to the auxiliary power supply equipment connected, and control the main air switch of the auxiliary power supply equipment to open according to the fault signal to disconnect the power supply circuit.

The energy storage battery system and safety control method provided by the present invention can automatically disconnect the DC main circuit, avoid damage and danger to the battery management system, battery and other equipment caused by system charging and discharging in the event of a safety failure, and can quickly and reliably exit charge and discharge status, reducing safety risks.

Description of drawings

Fig. 1 is a connection schematic diagram of an existing energy storage battery system.

Fig. 2 is a schematic connection diagram of the energy storage battery system according to the first embodiment of the present invention.

Fig. 3 is a schematic connection diagram of the energy storage battery system according to the second embodiment of the present invention.

Fig. 4 is a flowchart of a safety control method for an energy storage battery system according to a third embodiment of the present invention.

Fig. 5 is a flowchart of a safety control method for an energy storage battery system according to a fourth embodiment of the present invention.

Detailed ways

In order to further explain the technical means and effects adopted by the present invention to achieve the intended purpose, the specific implementation methods, methods and steps of the energy storage battery system and safety control method proposed according to the present invention will be described below in conjunction with the accompanying drawings and preferred embodiments. , structure, feature and effect, detailed description is as follows.

The foregoing and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of preferred embodiments with reference to the drawings. Through the description of specific embodiments, the technical means and effects of the present invention to achieve the intended purpose can be understood more deeply and specifically, but the attached drawings are only for reference and description, and are not used to explain the present invention limit.

first embodiment

Please refer to FIG. 2 . FIG. 2 is a schematic connection diagram of the energy storage battery system according to the first embodiment of the present invention. The energy storage battery system in this embodiment includes a plurality of battery clusters 100, a battery management system 200, an energy management system 300, and an energy storage converter 400. The energy storage battery system also includes a confluence protection device 500 and a system emergency signal device 600; The protection device 500 includes a total positive bus bar, a total negative bus bar and a DC circuit breaker 510. The total positive bus bar and the total negative bus bar of the bus protection device 500 are respectively connected to a plurality of battery clusters 100, and the bus protection device 500 is also connected to the energy storage The converter 400 is connected; the battery management system 200 includes a detection control unit 210, the detection control unit 210 is connected to the battery cluster 100 and the DC circuit breaker 510 respectively, and is configured to collect the state information of the battery cluster, and compare the state information of the battery cluster with the preset threshold Compare, and control the on-off of the DC circuit breaker 510 according to the comparison result; the system emergency signal device 600 is connected to the DC circuit breaker 510 to control the on-off of the DC circuit breaker 510 .

In an embodiment of the present invention, the detection control unit 210 is connected to the first contact of the DC circuit breaker 510 through the first dry contact; the system emergency signal device 600 is connected to the second contact of the DC circuit breaker 510 through the second dry contact . Through the dry contact connection, the system can respond quickly and reliably when a safety fault occurs.

In an embodiment of the present invention, both the first contact and the second contact of the DC circuit breaker 510 are normally open contacts, and are respectively connected to the control circuit of the DC circuit breaker 510 .

In an embodiment of the present invention, the battery cluster 100 may include several 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 general positive interface of the battery cluster 100 is correspondingly connected to the general positive bus bar of the bus protection device 500 , and the general negative interface of the battery cluster 100 is correspondingly connected to the general 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 when a peripheral safety fault occurs, the energy storage converter 400 is notified to perform a protection action. In an embodiment, the system emergency signal device 600 is connected to the energy storage converter 400 through 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 bus. In an embodiment of the present invention, the battery management system 200 may be connected to the energy management system 300 through a Modbus bus. In an embodiment of the present invention, the energy management system 300 may be connected to the energy storage converter 400 through a Modbus bus.

Specifically, as shown in FIG. 2 , the connections in the energy storage battery system of this embodiment include power connections and communication connections. From the perspective of power connection, when the DC circuit breaker 510 is turned on, the battery cluster 100 can pass through the battery management system 200, and through the total positive bus bar and the total negative bus bar of the bus protection device 500 and the energy storage converter 400. Connected for energy transfer of charge and discharge. In terms of communication connections, the battery management system 200 can be connected to the battery cluster 100, the confluence protection device 500, the energy management system 300, and the energy storage converter 400 respectively, and the energy management system 300 is also connected to the energy storage converter 400. The emergency signal device 600 may be connected to the confluence 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 fault occurs, if the safety fault is related to the battery, the safety fault can be set as an internal safety fault. The detection control unit 210 collects battery cluster status information such as battery voltage, current, temperature, etc., and compares the battery cluster status information with a preset threshold, for example, compares the voltage value in the battery cluster status information with a preset voltage threshold , or compare the current value in the battery cluster status information with the preset current threshold, or compare the temperature value in the battery cluster status information with the preset temperature value, etc., and control the on-off of the DC circuit breaker 510 according to the comparison result to prevent The battery is overcharged and discharged, overvoltage or overcurrent flows through the battery, and the battery temperature is too high. Therefore, when an internal safety fault occurs, the energy storage battery system can automatically disconnect the DC main circuit, avoiding damage and danger to the battery management system 200, batteries and other equipment caused by system charging and discharging in the event of a safety fault, and can quickly and reliably Exit the charging and discharging state to reduce safety risks.

When a safety fault occurs, if the safety fault is related to non-battery-related factors such as emergency stop, water immersion, fire, etc., the safety fault can be set as a peripheral safety fault. The system emergency signal device 600 can be respectively connected with the emergency stop button signal generator 620, the flooding system alarm signal device 630, the fire system alarm signal device 640, etc. to receive multiple fault signals. When the system emergency signal device 600 receives any fault signal, it controls the DC circuit breaker 510 to disconnect. Therefore, when a peripheral safety fault occurs, the energy storage battery system can automatically disconnect the DC main circuit, avoiding damage and danger to the battery management system 200, batteries and other equipment caused by system charging and discharging in the event of a safety fault, and can quickly and reliably Exit the charging and discharging state to reduce safety risks.

In an embodiment of the present invention, the detection control unit 210 may be connected to the 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 can receive the internal alarm signal sent by the energy management system 300, the energy storage converter 400 or other devices, and work according to the internal alarm signal, that is, it is configured when receiving the internal alarm signal trigger for detection and threshold comparison.

In an embodiment of the present invention, the detection control unit 210 is connected and communicated with the energy management system 300 and the energy storage converter 400 respectively. In one embodiment, the detected control unit 210 is respectively connected and communicated with the energy management system 300 and the energy storage converter 400 through dry contacts. Then, when the detection control unit 210 compares the state information of the battery cluster with the preset threshold, and controls the switching of the DC circuit breaker 510 according to the comparison result, the detection control unit 210 can also control the energy management system 300 and the energy storage transformer according to the comparison result. Whether the flow controller 400 performs protection actions.

In an embodiment of the present invention, the detection control unit 210 can also be configured to compare the state information of the battery cluster with a preset threshold, and select whether to notify the energy management system 300 and the energy storage converter 400 of the state information of the battery cluster in real time according to the comparison result. , or choose to notify the energy management system 300 and the energy storage converter 400 to perform protection actions. Therefore, the severity of the security fault can be judged 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 for connecting to the grid.

In an embodiment of the present invention, the energy storage battery system further includes an auxiliary power supply device 700 , and the system emergency signal device 600 is connected to the auxiliary power supply device 700 . In an embodiment, the system emergency signal device 600 may be connected to the auxiliary power supply device 700 through a dry contact. Specifically, when the system emergency signal device 600 receives a fault signal, it not only controls the DC circuit breaker 510 to disconnect, but also controls the auxiliary power supply equipment 700 to make the main circuit breaker of the auxiliary power supply equipment 700 open, disconnect the power supply circuit, and cut off the power grid. The connection improves the security of the system.

second embodiment

Please refer to FIG. 3 . FIG. 3 is a schematic connection diagram of the energy storage battery system according to the second embodiment of the present invention. This embodiment provides an energy storage battery system. Its basic structure, principle and technical effects are the same as those of the first embodiment. Corresponding content. In this embodiment, in an energy storage battery system, the system emergency signal device 600 includes a relay 610, and the control circuit of the relay 610 is connected with the emergency stop button signal generating device 620, the flooding system alarm signal device 630, and the fire system alarm signal respectively. The device 640 is connected, and the relay 610 is connected with the DC circuit breaker 510 .

However, the control circuit of the relay 610 in the embodiment of the present invention is not limited to being connected to the emergency stop button signal generating device 620, the flooding system alarm signal device 630, and the fire system alarm signal device 640, but can also be connected to other signal generating devices or The alarm signal devices are connected to realize the reliable collection of multi-channel fault signals, and the corresponding technical solutions all belong to the protection scope of the present invention.

In an 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 to the emergency stop button signal generating device 620 , the second normally closed dry contact is connected to the water immersion system alarm signal device 630, the third normally closed dry contact is connected to the fire system alarm signal device 640, the first normally closed dry contact, the second normally closed dry contact and the third normally closed dry contact The dry contacts are connected in series in a normally closed circuit.

Specifically, when any one of the emergency stop button signal generating device 620, the flooding system alarm signal device 630, and the fire protection system alarm signal device 640 detects a fault signal, it will make the first normally closed dry contact, the second normally closed dry contact and The switch unit corresponding to the corresponding normally closed dry contact in the third normally closed dry contact is disconnected, and then the control circuit of the relay 610 is in the disconnected state, and the relay 610 will output a dry contact signal to the DC circuit breaker 510 in the bus protection device 500 , to control the disconnection of the DC circuit breaker 510 .

third embodiment

Please refer to FIG. 4 . FIG. 4 is a flowchart of a safety control method for an energy storage battery system according to a third embodiment of the present invention. Please refer to Figure 2, Figure 3 and Figure 4 together.

Based on the same inventive concept, an embodiment of the present invention also provides a safety control method for an energy storage battery system. The energy storage battery system includes a plurality of battery clusters 100, a battery management system 200, an energy management system 300, and an energy storage converter 400. , a confluence protection device 500 and a system emergency signal device 600, the confluence protection device 500 includes a total positive bus bar, a total negative bus bar and a DC circuit breaker 510, and the total positive bus bar and the total negative bus bar of the confluence protection device 500 are respectively connected to multiple The battery cluster 100 is connected, and the confluence protection device 500 is also connected to the energy storage converter 400; the battery management system 200 includes a detection control unit 210, which is connected to the battery cluster 100 and the DC circuit breaker 510 respectively, and the system emergency signal device 600 Connected to the DC circuit breaker 510, the safety control method includes:

S1. The battery management system 200 detects and judges whether to execute the protection action through the detection control unit 210; if it determines to execute the protection action, it controls the confluence protection device 500 to execute the protection action.

In an embodiment of the present invention, the step of the battery management system 200 detecting and judging whether to execute the protection action includes: collecting battery cluster state information, comparing the battery cluster state information with a preset threshold, and judging whether to execute the protection action according to the comparison result.

Specifically, the battery management system 200 can collect battery cluster status information such as battery voltage, current, temperature, etc., detect and determine whether to perform a protection action, and can compare the battery cluster status information with a preset threshold, for example, the battery cluster Compare the voltage value in the status information with the preset voltage threshold, or compare the current value in the battery cluster status information with the preset current threshold, or compare the temperature value in the battery cluster status information with the preset temperature value, etc., according to the comparison As a result, it is controlled whether the bus protection device 500 performs a protection action.

In an embodiment of the present invention, the step of performing the protection action by the bus protection device 500 includes: controlling the disconnection of the DC circuit breaker 510 to disconnect the DC main circuit.

S2. The system emergency signal device 600 controls the confluence protection device 500 to perform a protection action according to the fault signal.

Specifically, when a peripheral safety fault occurs, that is, when a safety fault is related to non-battery-related factors such as emergency stop, flooding, fire, etc., the system emergency signal device 600 receives the corresponding fault signal and controls the confluence protection device 500 to perform protection actions, such as controlling the DC The circuit breaker 510 is turned off to disconnect the DC main circuit.

In an embodiment of the present invention, before the battery management system 200 detects and judges whether to execute the protection action through the detection control unit 210 , there are steps: the battery management system 200 receives the trigger signal, detects according to the trigger signal, and judges whether to execute the protection action. The trigger signal may come from the energy management system 300, the energy storage converter 400, or an emergency signal device, etc. Among them, if the trigger signal comes from the energy management system 300 or the energy storage converter 400, etc., it can be used to determine the occurrence of an internal safety fault; if the trigger signal comes from an emergency signal device, it can be used to determine the occurrence of a peripheral safety fault.

It should be noted that the security control method of this embodiment does not limit the sequence of steps S1 and S2. For example, during implementation, step S1 is prioritized according to the occurrence of internal security faults; and step S2 is preferentially executed according to the occurrence of peripheral security faults. , and step S1 can also be executed at the same time.

Therefore, in the safety control method of the energy storage battery system in this embodiment, the energy storage battery system can automatically control the confluence protection device 500 to perform protection actions such as disconnecting the DC main circuit, avoiding the impact of system charging and discharging on the battery management system in the event of a safety failure. 200. In case of damage and danger of batteries and other equipment, it can quickly and reliably exit the charging and discharging state, reducing safety risks.

Fourth embodiment

Please refer to FIG. 5 . FIG. 5 is a flowchart of a safety control method for an energy storage battery system according to a fourth embodiment of the present invention. This embodiment provides a safety control method for an energy storage battery system. Its principle and technical effect are the same as those of the third embodiment. content.

In an embodiment of the present invention, the step of the battery management system 200 detecting and judging whether to execute the protection action through the detection control unit 210 further includes: if it is judged not to execute, then notifying the energy management system 300 and the energy storage transformer of the status information of the battery cluster in real time. Converter 400, energy management system 300 and energy storage converter 400 record events; Executing a protection action, the battery management system 200 executes a self-protection action. 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 corresponding protection actions, which can form multiple protections and increase the safety of the system.

In an embodiment of the present invention, the system emergency signal device 600 controls the confluence protection device 500 to perform protection actions according to the fault signal, and further includes a step: the system emergency signal device 600 is connected to the battery management system 200, and notifies the battery management system 200 according to the fault signal Execute protective action. In one embodiment, the battery management system 200 performing the protection action includes a step: the battery management system 200 detects and determines whether to perform the protection action through the detection control unit 210 . Then, the protection action is executed by the battery management system 200, which increases the security of the system.

In an embodiment of the present invention, the system emergency signal device 600 controls the confluence protection device 500 to perform protection actions according to the fault signal, and further includes a step: the system emergency signal device 600 is connected to the energy storage converter 400, and notifies the energy storage converter 400 according to the fault signal The converter 400 performs protection actions. Then, when a peripheral safety fault occurs, the system emergency signal device 600 can notify the energy storage converter 400 to perform a protection action, which increases the safety of the system. In an embodiment, the step of performing a protection action for the energy storage converter 400 includes: disconnecting the DC switch in the energy storage converter 400 .

In an embodiment of the present invention, the system emergency signal device 600 controls the bus protection device 500 to perform the protection action according to the fault signal, and further includes a step: the system emergency signal device 600 is connected to the auxiliary power supply equipment 700, and controls the power supply of the auxiliary power supply equipment 700 according to the fault signal The main circuit breaker is open to disconnect the power supply circuit, which increases the safety of the system. But the present invention is not limited thereto. The system emergency signal device 600 can also control the action of the uncoupling device according to the fault signal so that the main circuit breaker is opened to disconnect the power supply circuit, which increases the safety of the system.

In an embodiment of the present invention, the step of controlling the bus protection device to perform a protection action further includes: the battery management system 200 controls the bus protection device 500 to perform a protection action through a dry contact; and/or the system emergency signal device 600 controls the bus protection device through a dry contact The device 500 performs protection actions. In an embodiment of the present invention, the step of notifying the battery management system 200 to perform the protection action further includes: the system emergency signal device 600 notifying the battery management system 200 to perform the protection action through the dry contact. In an embodiment of the present invention, the step of notifying the energy storage converter 400 to perform a protection action further includes: the system emergency signal device 600 notifying the energy storage converter 400 to perform a protection action through a dry contact. In an embodiment of the invention, the step of controlling the auxiliary power supply device 700 to make the main circuit breaker open to disconnect the power supply circuit further includes: the system emergency signal device 600 controls the auxiliary power supply device 700 through dry contacts to make the main circuit breaker open to disconnect the power supply circuit. Open the power supply circuit. Through the dry contact connection, the system can respond quickly and reliably when a safety fault occurs.

In an embodiment of the present invention, the system emergency signal device 600 includes a step before controlling the confluence protection device 500 to perform protection actions according to the fault signal: the system emergency signal device 600 collects multiple fault signals. In one embodiment, the fault signal is generated according to the triggering of the emergency stop button, the alarm of the flooding system or the alarm of the fire protection system. Specifically, the system emergency signal device 600 can collect multiple fault signals, and can be connected with the emergency stop button signal generating device 620, the flooding system alarm signal device 630, and the fire protection system alarm signal device respectively, for example, by using a relay 610 through a dry contact, etc. 640 and so on are connected, the emergency stop button is triggered, the flooding system alarm or the fire protection system alarm, etc., can send a fault signal to the system emergency signal device 600, and then the system emergency signal device 600 controls the confluence protection device 500 to perform protection actions, for example Control the DC circuit breaker 510 to disconnect, so as to disconnect the DC main circuit.

The energy storage battery system and safety control method provided by the embodiments of the present invention can automatically disconnect the DC main circuit, avoiding damage and danger to the battery management system, battery and other equipment caused by system charging and discharging in the event of a safety failure, and can be fast and reliable. Exit the charge and discharge state without any delay, reducing safety risks.

The above description is only the preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as above with the preferred embodiment, it is not intended to limit the invention. Anyone who is familiar with this professional technology Personnel, without departing from the scope of the technical solution of the invention, can use the technical content disclosed above to make some changes or modify equivalent embodiments with equivalent changes, but if they do not deviate from the technical solution of the invention, the technical essence of the invention is the basis for the above Any simple modifications, equivalent changes and modifications made in the embodiments still fall within the scope of the technical solution of the present 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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