An emergency communication method and device for a battery management system of an electrochemical energy storage power station

Abstract

The invention discloses an emergency communication method and device for a battery management system of an electrochemical energy storage power station. According to the data sending state of a battery cluster management unit collected by a normal channel, it is judged whether to start an emergency communication channel for communication. If the data sending state is a data sending failure state, the emergency communication channel is started to transmit the data channel, and the acquisition module address code of the failed battery management unit and the high-voltage box signal is collected and saved, and the acquisition module address code is stored in an array. The acquisition module address code in the array is sequentially sent to the battery management unit, so that the battery management unit makes a judgment according to the acquisition module address code and uploads the fault information to the battery cluster management unit. If the data sending state is a normal data sending state, the emergency communication is not started. The method realizes the emergency communication of the electrochemical energy storage power station by constructing an emergency communication channel, improves the reliability of the communication of the electrochemical energy storage power station, and reduces the cost of constructing a safe communication channel.

Description

Technical Field

[0001] The present invention relates to the technical field of power system maintenance, and in particular to an emergency communication method and device for a battery management system of an electrochemical energy storage power station. Background Art

[0002] As an important supporting link in building a new power system, the installed capacity of electrochemical energy storage power stations in the power system continues to grow rapidly. However, due to the complex working conditions of the energy storage system and the low reliability of the communication system, energy storage communication system failures occur from time to time. When the existing communication system is interrupted, it is usually shut down to avoid safety accidents, which seriously affects the safe and stable operation of the power system.

[0003] The existing energy storage power station battery management system mainly communicates through a single channel through CAN, SPI or daisy chain communication. When the communication channel is physically interrupted or blocked, the battery cell information cannot be sent up, and the battery operation status cannot be accurately grasped, and can only be processed in a shutdown mode. At the same time, if a separate communication channel is established, the communication cost and the size of the communication equipment will be greatly increased. Summary of the invention

[0004] In order to solve the above technical problems, the embodiments of the present invention provide an electrochemical energy storage power station battery management system emergency communication method and, by constructing an emergency communication channel, energy storage battery emergency communication is realized, the reliability of electrochemical energy storage power station communication is improved, and the cost of constructing a secure communication channel is reduced.

[0005] A first aspect of an embodiment of the present invention provides an emergency communication method for a battery management system of an electrochemical energy storage power station, the method comprising:

[0006] The data transmission status of the battery cluster management unit of the normal channel collected is used to determine whether to start the emergency communication channel for communication, wherein the data transmission status includes a normal data transmission status and a data transmission failure status;

[0007] If the data sending status is a data sending failure status, the emergency communication channel is started to transmit data, and the acquisition module address code of the faulty battery management unit and high-voltage box signal is collected and saved, and the acquisition module address code is stored in an array, and the acquisition module address codes in the array are sent to the battery management unit in sequence, so that the battery management unit makes a judgment based on the acquisition module address code and uploads the fault information to the battery cluster management unit. If the data sending status is a normal data sending status, it is confirmed that the electrochemical energy storage power station has no faults and can continue to operate, and the emergency communication channel is not started for communication, wherein the emergency communication channel is established by adding an emergency communication module to each communication node by utilizing a low-voltage auxiliary power circuit.

[0008] In the implementation of this embodiment, the data transmission status of the battery cluster management unit of the normal channel is collected to determine whether to start the emergency communication channel for communication. If the data transmission status is a data transmission failure status, the emergency communication channel is started to transmit data, and the acquisition module address code of the faulty battery management unit and the high-voltage box signal is collected and saved, and the acquisition module address code is stored in an array, and the acquisition module address codes in the array are sent to the battery management unit in sequence, so that the battery management unit makes a judgment based on the acquisition module address code and uploads the fault information to the battery cluster management unit. If the data transmission status is a normal data transmission status, the emergency communication is not started. This method realizes the emergency communication of the electrochemical energy storage power station by constructing an emergency communication channel, improves the reliability of the communication of the electrochemical energy storage power station, and reduces the cost of constructing a safe communication channel.

[0009] In a possible implementation of the first aspect, the acquisition module address codes in the array are sequentially sent to the battery management unit, so that the battery management unit makes a judgment according to the acquisition module address codes and uploads the fault information to the battery cluster management unit, specifically:

[0010] The acquisition module address codes in the array are sent to the battery management unit in sequence, so that the battery management unit determines whether the acquisition module address code is consistent with the preset address code;

[0011] If they are consistent, the emergency communication is started, and the fault information of the battery management unit is uploaded to the battery cluster management unit by using the emergency communication, and it is determined whether the address code of the battery management unit is consistent with the address code of the acquisition module in the array. If they are consistent, the fault information is uploaded to the battery cluster management unit. If they are inconsistent, the acquisition module address code continues to be sent;

[0012] If they are inconsistent, emergency communication will not be started and the acquisition module address code will continue to be sent.

[0013] In a possible implementation manner of the first aspect, starting the emergency communication channel to transmit data specifically includes:

[0014] Using the emergency communication data protocol to receive the baseband signal generated by the battery management unit, converting the baseband signal through a modulation drive circuit to obtain a converted signal, and inputting the converted information into a half-bridge circuit to obtain a drive signal;

[0015] After sending the driving signal to the resonant circuit, the driving signal is coupled to the line transmission circuit through a transformer, and the driving signal is transmitted to the signal receiving circuit through the transmission circuit, so that the receiving circuit sends the driving signal to the signal conditioning circuit through the filter circuit to obtain a carrier signal;

[0016] The carrier signal is sent to the controller through a second-order active filter.

[0017] In a possible implementation manner of the first aspect, the emergency communication data protocol includes an acquisition module address code, a status bit, and a check bit.

[0018] A second aspect of an embodiment of the present invention provides an emergency communication device for a battery management system of an electrochemical energy storage power station, the device comprising a collection module and a judgment module.

[0019] The acquisition module is used to acquire the data transmission status of the battery cluster management unit of the normal channel, and determine whether to start the emergency communication channel for communication, wherein the data transmission status includes the normal state of data transmission and the fault state of data transmission;

[0020] The judgment module is used to start the emergency communication channel to transmit data if the data sending status is a data sending failure status, and collect and save the acquisition module address code of the faulty battery management unit and high-voltage box signal, store the acquisition module address code in an array, and send the acquisition module address codes in the array to the battery management unit in sequence, so that the battery management unit makes a judgment based on the acquisition module address code and uploads the fault information to the battery cluster management unit; if the data sending status is a normal data sending status, it is confirmed that the electrochemical energy storage power station has no faults and can continue to operate, and the emergency communication channel is not started for communication, wherein the emergency communication channel is established by adding an emergency communication module to each communication node using a low-voltage auxiliary power circuit.

[0021] In a possible implementation manner of the second aspect, the determination module includes an address code determination unit and an execution unit.

[0022] The address code judgment unit is used to send the acquisition module address codes in the array to the battery management unit in sequence, so that the battery management unit can judge whether the acquisition module address code is consistent with the preset address code;

[0023] The execution unit is used to start emergency communication if they are consistent, upload the fault information of the battery management unit to the battery cluster management unit by emergency communication, and determine whether the address code of the battery management unit is consistent with the acquisition module address code in the array. If they are consistent, upload the fault information to the battery cluster management unit; if they are inconsistent, continue to send the acquisition module address code; if they are inconsistent, do not start emergency communication and continue to send the acquisition module address code.

[0024] In a possible implementation manner of the second aspect, the determination module includes a receiving unit, a converting unit, and a sending unit.

[0025] The receiving subunit is used to receive the baseband signal generated by the battery management unit using the emergency communication data protocol, convert the baseband signal through the modulation drive circuit to obtain a converted signal, and input the converted information into the half-bridge circuit to obtain a drive signal;

[0026] The conversion subunit is used to send the driving signal to the resonant circuit and couple it to the line transmission circuit through the transformer, and transmit the driving signal to the signal receiving circuit through the transmission circuit, so that the receiving circuit sends the driving signal to the signal conditioning circuit through the filter circuit to obtain the carrier signal;

[0027] The sending subunit is used to send the carrier signal to the controller of the battery management unit through the second-order active filter.

[0028] In a possible implementation manner of the second aspect, the emergency communication data protocol includes an acquisition module address code, a status bit, and a check bit.

[0029] A third aspect of an embodiment of the present invention provides an electrochemical energy storage power station battery management system emergency communication system, the system comprising a low-voltage auxiliary line, an electrochemical energy storage power station battery management system emergency communication device and a low-voltage auxiliary power port.

[0030] The electrochemical energy storage power station battery management system emergency communication device is used to execute the electrochemical energy storage power station battery management system emergency communication method as described in any one of the first aspects of this embodiment;

[0031] The low-voltage auxiliary line is connected to the emergency communication device of the battery management system of the electrochemical energy storage power station, and the emergency communication device of the battery management system of the electrochemical energy storage power station is connected to the low-voltage auxiliary power supply port.

[0032] In a possible implementation of the third aspect, the low-voltage auxiliary line is used to supply power to an emergency communication device of a battery management system of an electrochemical energy storage power station;

[0033] The emergency communication device of the battery management system of the electrochemical energy storage power station is used to collect the data transmission status of the battery cluster management unit on the normal channel, and judge whether to start the emergency communication channel for communication, wherein the data transmission status includes the normal state of sending data and the fault state of sending data. If the data transmission status is the fault state of sending data, the emergency communication channel is started to transmit data, and the acquisition module address code of the faulty battery management unit and the high-voltage box signal is collected and saved, and the acquisition module address code is stored in an array, and the acquisition module address code in the array is sent to the battery management unit in sequence, so that the battery management unit makes a judgment according to the acquisition module address code and uploads the fault information to the battery cluster management unit. If the data transmission status is the normal state of sending data, the emergency communication is not started;

[0034] The low-voltage auxiliary power port is used to send the collected signals of the emergency communication device of the battery management system of the electrochemical energy storage power station to the controller through the emergency communication device of the battery management system of the electrochemical energy storage power station. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 : A flow chart of an embodiment of an emergency communication method for a battery management system of an electrochemical energy storage power station provided by the present invention;

[0036] Figure 2 : A structural diagram of an emergency communication method of an embodiment of an emergency communication method of a battery management system of an electrochemical energy storage power station provided by the present invention;

[0037] Figure 3 : A schematic diagram of the BCMU program flow of an embodiment of the emergency communication method of the battery management system of the electrochemical energy storage power station provided by the present invention;

[0038] Figure 4 : A schematic diagram of a BMU program flow chart of an embodiment of an emergency communication method for a battery management system of an electrochemical energy storage power station provided by the present invention;

[0039] Figure 5 : A schematic diagram of the structure of an emergency communication module of an embodiment of an emergency communication method for a battery management system of an electrochemical energy storage power station provided by the present invention;

[0040] Figure 6 : A schematic diagram of an emergency communication data protocol for an embodiment of an emergency communication method for a battery management system of an electrochemical energy storage power station provided by the present invention;

[0041] Figure 7 : A schematic diagram of the system structure of another embodiment of the emergency communication method for the battery management system of the electrochemical energy storage power station provided by the present invention. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] Embodiment 1

[0044] Please refer to Figure 1 , which is a flow chart of an embodiment of an emergency communication method for a battery management system of an electrochemical energy storage power station provided by an embodiment of the present invention, including steps S11 to S12, each of which is specifically as follows:

[0045] S11, collecting the data transmission status of the battery cluster management unit of the normal channel, and judging whether to start the emergency communication channel for communication, wherein the data transmission status includes a normal data transmission status and a data transmission failure status.

[0046] In this embodiment, if Figure 2 As shown in the figure, the emergency communication of the energy storage power station is mainly achieved by adding emergency communication modules to the low-voltage auxiliary power of the high-voltage signal box, battery management unit, and battery cluster management unit, and using the low-voltage auxiliary circuit of the battery management system for power supply. During use, the BCMU detects whether the original communication method can send data normally, and the original communication method can determine whether the BMU communication data transmission and reception is normal.

[0047] S12. If the data sending status is a data sending failure status, the emergency communication channel is started to transmit data, and the acquisition module address code of the faulty battery management unit and the high-voltage box signal is collected and saved, and the acquisition module address code is stored in an array, and the acquisition module address codes in the array are sent to the battery management unit in sequence, so that the battery management unit makes a judgment based on the acquisition module address code and uploads the fault information to the battery cluster management unit. If the data sending status is a normal data sending status, the emergency communication is not started.

[0048] In a preferred embodiment, the acquisition module address codes in the array are sent to the battery management unit in sequence, so that the battery management unit makes a judgment based on the acquisition module address codes and uploads the fault information to the battery cluster management unit, specifically:

[0049] The acquisition module address codes in the array are sent to the battery management unit in sequence, so that the battery management unit determines whether the acquisition module address code is consistent with the preset address code;

[0050] If they are consistent, the emergency communication is started, and the fault information of the battery management unit is uploaded to the battery cluster management unit by using the emergency communication, and it is determined whether the address code of the battery management unit is consistent with the address code of the acquisition module in the array. If they are consistent, the fault information is uploaded to the battery cluster management unit. If they are inconsistent, the acquisition module address code continues to be sent;

[0051] If they are inconsistent, emergency communication will not be started and the acquisition module address code will continue to be sent.

[0052] In a preferred embodiment, the emergency communication channel is started to transmit data, specifically:

[0053] The baseband signal generated by the battery management unit is received by using the emergency communication data protocol, the baseband signal is converted through the modulation drive circuit to obtain a converted signal, and the converted information is input into the half-bridge circuit to obtain a drive signal;

[0054] After sending the driving signal to the resonant circuit, the driving signal is coupled to the line transmission circuit through a transformer, and the driving signal is transmitted to the signal receiving circuit through the transmission circuit, so that the receiving circuit sends the driving signal to the signal conditioning circuit through the filter circuit to obtain a carrier signal;

[0055] The carrier signal is sent to the controller through a second-order active filter.

[0056] In a preferred embodiment, the emergency communication data protocol includes an acquisition module address code, a status bit and a check bit.

[0057] In this embodiment, if the BCMU detects that the original communication mode cannot send data normally, that is, the data transmission is in a faulty state, the emergency communication channel is started, the address code of the faulty BMU and high-voltage box signal acquisition module is stored in the data a(i), and then the fault data address code is sent to the BMU in sequence, and it is determined whether the faulty BMU or high-voltage box information acquisition module uploads the fault information. If the fault information is uploaded, the next fault address code is sent, and if the fault information is not received, the original address code continues to be sent.

[0058] like Figure 3 and Figure 4 As shown, after the fault data address code is sent to the corresponding BMU, the corresponding BMU unit needs to respond to the fault address code data and determine whether the fault address code corresponds to the unit address code. If so, the emergency communication is started to upload the fault data to the BCMU. When uploading the fault data to the BCMU, it is determined whether the address code of the uploaded fault data is consistent with the sent fault address code. If they are consistent, the fault data is uploaded to the BCMU. If not, the fault data address code sent by the BCMU continues to be detected.

[0059] Figure 5 This is a schematic diagram of the structure of the emergency communication module of the proposed electrochemical energy storage power station battery management system. One end of the line transmission circuit is connected to the low-voltage auxiliary line composed of the power supply switch power supply, and the other end is connected to the low-voltage auxiliary power port of the battery cluster management unit (BCMU), battery management unit (BMU) and high-voltage box signal acquisition module. The line transmission circuit is also composed of L3, L4, C p1 , C p2 The filter circuit composed of and D1 is connected in series and parallel. The signal sending circuit is composed of the baseband signal sent to the modulation drive circuit to the half-bridge circuit composed of S1 and S2. The half-bridge circuit is sent to the resonant circuit composed of L1 and C1 and coupled to the line transmission circuit by the transformer. The signal receiving circuit obtains the line signal from the line through the DC blocking capacitor C5 and the transformer T2, and passes through the filter circuit composed of L2 and C2 to the signal conditioning circuit composed of R1-R5 and A1, and finally sent to the controller of the management unit through the second-order active filter composed of op amp A2. The baseband signal is sent through the half-bridge signal through a carrier frequency of more than 200kHz, and the signal receiving circuit restores the carrier signal and sends it to the IO port of the MCU for restoration.

[0060] Figure 6The figure shows a schematic diagram of the data protocol of an electrochemical energy storage power station. The address bits shown are fixed address codes of each battery cluster management unit (BCMU), battery management unit (BMU) and high-voltage box signal acquisition module. The address can be increased or decreased with the number of addresses. The status bits shown show three states: chargeable, dischargeable, battery overtemperature and battery overvoltage. They are uploaded to the BCMU for temporary emergency charging management and decision-making in the energy storage power station. The check bits shown are added to the aforementioned address bits and status bits, and parity judgment is performed to verify the correctness of data transmission.

[0061] Among them, address bit: 5-bit address bit, supports up to 32 nodes, and is expandable; status bit: 11 means charging, 01 means discharging, 11 means battery overtemperature, and 10 means battery overvoltage; check bit: parity check bit, using the addition of each bit for checking.

[0062] The present invention provides an electrochemical energy storage power station battery management system emergency communication method, which is used to solve the problem that the electrochemical energy storage power station cannot work normally when the communication is interrupted. By using a low-voltage auxiliary power circuit to add an emergency communication module in each communication node, the reliability of the electrochemical energy storage power station communication is improved. At the same time, the proposed emergency work judgment mechanism and emergency data upload protocol are adopted to facilitate the electrochemical energy storage power station to continue to operate safely and stably before the arrival of operation and maintenance personnel. In addition, the proposed electrochemical energy storage power station emergency communication protocol and MCU software workflow can use a simplified programming mode and handshake communication method to achieve safe, fast and real-time emergency communication of the electrochemical energy storage power station.

[0063] Embodiment 2

[0064] Accordingly, see Figure 7 , Figure 7 The present invention provides an electrochemical energy storage power station battery management system emergency communication device. As shown in the figure, the electrochemical energy storage power station battery management system emergency communication device includes a collection module 701 and a judgment module 702.

[0065] The acquisition module 701 is used to acquire the data transmission status of the battery cluster management unit of the normal channel, and determine whether to start the emergency communication channel for communication, wherein the data transmission status includes a normal state of data transmission and a fault state of data transmission;

[0066] The judgment module 702 is used to start the emergency communication channel to transmit data if the data sending status is a data sending failure status, and collect and save the acquisition module address code of the faulty battery management unit and the high-voltage box signal, store the acquisition module address code in an array, and send the acquisition module address codes in the array to the battery management unit in sequence, so that the battery management unit makes a judgment based on the acquisition module address code and uploads the fault information to the battery cluster management unit; if the data sending status is a normal data sending status, it is confirmed that the electrochemical energy storage power station has no faults and can continue to operate, and the emergency communication channel is not started for communication, wherein the emergency communication channel is established by adding an emergency communication module to each communication node using a low-voltage auxiliary power circuit.

[0067] In a preferred embodiment, the determination module 702 includes an address code determination unit 7021 and an execution unit 7022.

[0068] The address code determination unit 7021 is used to sequentially send the acquisition module address codes in the array to the battery management unit so that the battery management unit determines whether the acquisition module address code is consistent with the preset address code;

[0069] The execution unit 7022 is used to start the emergency communication if they are consistent, upload the fault information of the battery management unit to the battery cluster management unit by using the emergency communication, and determine whether the address code of the battery management unit is consistent with the acquisition module address code in the array. If they are consistent, upload the fault information to the battery cluster management unit; if they are inconsistent, continue to send the acquisition module address code; if they are inconsistent, do not start the emergency communication and continue to send the acquisition module address code.

[0070] In a preferred embodiment, the determination module 702 includes a receiving unit 7023, a conversion unit 7024 and a sending unit 7025.

[0071] The receiving unit 7023 is used to receive the baseband signal generated by the battery management unit using the emergency communication data protocol, convert the baseband signal through the modulation drive circuit to obtain a converted signal, and input the converted information into the half-bridge circuit to obtain a drive signal;

[0072] The conversion unit 7024 is used to send the driving signal to the resonant circuit and couple it to the line transmission circuit through the transformer, and transmit the driving signal to the signal receiving circuit through the transmission circuit, so that the receiving circuit sends the driving signal to the signal conditioning circuit through the filter circuit to obtain the carrier signal;

[0073] The sending unit 7025 is used to send the carrier signal to the controller of the battery management unit through the second-order active filter.

[0074] In a preferred embodiment, the emergency communication data protocol includes an acquisition module address code, a status bit and a check bit.

[0075] Embodiment 3

[0076] Accordingly, the present invention provides an electrochemical energy storage power station battery management system emergency communication system. As shown in the figure, the system includes a low-voltage auxiliary line, an electrochemical energy storage power station battery management system emergency communication device and a low-voltage auxiliary power port.

[0077] Among them, the electrochemical energy storage power station battery management system emergency communication device is used to implement any one of the electrochemical energy storage power station battery management system emergency communication methods;

[0078] The low-voltage auxiliary line is connected to the emergency communication device of the battery management system of the electrochemical energy storage power station, and the emergency communication device of the battery management system of the electrochemical energy storage power station is connected to the low-voltage auxiliary power supply port.

[0079] In a preferred embodiment, the low voltage auxiliary line is used to supply power to the emergency communication device of the battery management system of the electrochemical energy storage power station;

[0080] The emergency communication device of the battery management system of the electrochemical energy storage power station is used to collect the data sending status of the battery cluster management unit of the normal channel, and judge whether to start the emergency communication channel for communication, wherein the data sending status includes the normal state of sending data and the fault state of sending data. If the data sending status is the fault state of sending data, the emergency communication channel is started to transmit data, and the acquisition module address code of the faulty battery management unit and the high-voltage box signal is collected and saved, and the acquisition module address code is stored in an array, and the acquisition module address code in the array is sent to the battery management unit in sequence, so that the battery management unit makes a judgment according to the acquisition module address code and uploads the fault information to the battery cluster management unit. If the data sending status is the normal state of sending data, it is confirmed that the electrochemical energy storage power station has no faults and can continue to operate, and the emergency communication channel is not started for communication, wherein the emergency communication channel is established by adding an emergency communication module in each communication node by using a low-voltage auxiliary power circuit.

[0081] The low-voltage auxiliary power port is used to send the collected signals of the emergency communication device of the battery management system of the electrochemical energy storage power station to the controller through the emergency communication device of the battery management system of the electrochemical energy storage power station.

[0082] The more detailed working principle and step flow of this embodiment can refer to, but are not limited to, the relevant records of Embodiment 1.

[0083] In summary, the implementation of the embodiments of the present invention has the following beneficial effects:

[0084] The data sending status of the battery cluster management unit of the normal channel is collected, and it is judged whether to start the emergency communication channel for communication. If the data sending status is a data sending failure status, the emergency communication channel is started to transmit data, and the acquisition module address code of the faulty battery management unit and the high-voltage box signal is collected and saved, and the acquisition module address code is stored in an array, and the acquisition module address code in the array is sent to the battery management unit in sequence, so that the battery management unit makes a judgment according to the acquisition module address code and uploads the fault information to the battery cluster management unit. If the data sending status is a normal data sending status, it is confirmed that the electrochemical energy storage power station has no faults and can continue to operate, and the emergency communication channel is not started for communication, wherein the emergency communication channel is established by adding an emergency communication module in each communication node by using a low-voltage auxiliary power circuit. The method realizes the emergency communication of the electrochemical energy storage power station by constructing an emergency communication channel, improves the reliability of the communication of the electrochemical energy storage power station, and reduces the cost of constructing a safe communication channel.

[0085] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. It is particularly pointed out that for those skilled in the art, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. An emergency communication method for a battery management system of an electrochemical energy storage power station, characterized in that: include: Collecting the data transmission status of the battery cluster management unit of the normal channel, and determining whether to start the emergency communication channel for communication, wherein the data transmission status includes a normal data transmission status and a data transmission failure status; If the data transmission state is a data transmission failure state, the emergency communication channel is started to transmit data, and the acquisition module address code of the failed battery management unit and the high-voltage box signal is collected and saved, and the acquisition module address code is stored in an array, and the acquisition module address code in the array is sent to the battery management unit in sequence, so that the battery management unit makes a judgment according to the acquisition module address code and uploads the fault information to the battery cluster management unit. If the data transmission state is a normal data transmission state, it is confirmed that the electrochemical energy storage power station has no faults and can continue to operate, and the emergency communication channel is not started for communication, wherein the emergency communication channel is established by adding an emergency communication module in each communication node by using a low-voltage auxiliary power circuit; Among them, the emergency communication module is composed of a line transmission circuit, a signal sending circuit, a signal receiving circuit, a signal conditioning circuit and an operational amplifier.

2. The electrochemical energy storage power station battery management system emergency communication method according to claim 1, characterized in that: The acquisition module address codes in the array are sequentially sent to the battery management unit so that the battery management unit makes a judgment according to the acquisition module address codes and uploads the fault information to the battery cluster management unit, specifically: Sending the acquisition module address codes in the array to the battery management unit in sequence, so that the battery management unit determines whether the acquisition module address code is consistent with the preset address code; If they are consistent, the emergency communication is started, and the fault information of the battery management unit is uploaded to the battery cluster management unit by using the emergency communication, and it is determined whether the address code of the battery management unit is consistent with the acquisition module address code in the array, if they are consistent, the fault information is uploaded to the battery cluster management unit, if they are inconsistent, the acquisition module address code continues to be sent; If they are inconsistent, the emergency communication will not be started and the acquisition module address code will continue to be sent.

3. The electrochemical energy storage power station battery management system emergency communication method according to claim 1, characterized in that: The initiation of the emergency communication channel to transmit data specifically includes: Using the emergency communication data protocol to receive the baseband signal generated by the battery management unit, converting the baseband signal through a modulation drive circuit to obtain a converted signal, and inputting the converted information into a half-bridge circuit to obtain a drive signal; After sending the driving signal to the resonant circuit, the driving signal is coupled to the line transmission circuit through a transformer, and the driving signal is transmitted to the signal receiving circuit through the transmission circuit, so that the receiving circuit sends the driving signal to the signal conditioning circuit through the filter circuit to obtain a carrier signal; The carrier signal is sent to the controller through a second-order active filter.

4. The electrochemical energy storage power station battery management system emergency communication method according to claim 3, characterized in that: The emergency communication data protocol includes an acquisition module address code, a status bit and a check bit.

5. An emergency communication device for a battery management system of an electrochemical energy storage power station, characterized in that: Including acquisition module and judgment module, The acquisition module is used to acquire the data transmission status of the battery cluster management unit of the normal channel to determine whether to start the emergency communication channel for communication, wherein the data transmission status includes a normal data transmission status and a data transmission failure status; The judgment module is used to start the emergency communication channel to transmit data if the data sending state is a data sending failure state, and collect and save the acquisition module address code of the faulty battery management unit and the high-voltage box signal, store the acquisition module address code in an array, and send the acquisition module address code in the array to the battery management unit in sequence, so that the battery management unit makes a judgment based on the acquisition module address code and uploads the fault information to the battery cluster management unit. If the data sending state is a normal data sending state, it is confirmed that the electrochemical energy storage power station has no faults and can continue to operate, and the emergency communication channel is not started for communication, wherein the emergency communication channel is established by adding an emergency communication module in each communication node using a low-voltage auxiliary power circuit; Among them, the emergency communication module is composed of a line transmission circuit, a signal sending circuit, a signal receiving circuit, a signal conditioning circuit and an operational amplifier.

6. The electrochemical energy storage power station battery management system emergency communication device according to claim 5, characterized in that: The judgment module includes an address code judgment unit and an execution unit. The address code judgment unit is used to send the acquisition module address codes in the array to the battery management unit in sequence, so that the battery management unit determines whether the acquisition module address code is consistent with the preset address code; The execution unit is used to start emergency communication if they are consistent, upload the fault information of the battery management unit to the battery cluster management unit by using the emergency communication, and determine whether the address code of the battery management unit is consistent with the acquisition module address code in the array, if they are consistent, upload the fault information to the battery cluster management unit, if they are inconsistent, continue to send the acquisition module address code, if they are inconsistent, do not start emergency communication, and continue to send the acquisition module address code.

7. The electrochemical energy storage power station battery management system emergency communication device according to claim 5, characterized in that: The judging module includes a receiving unit, a converting unit and a sending unit. The receiving unit is used to receive the baseband signal generated by the battery management unit using the emergency communication data protocol, convert the baseband signal through the modulation drive circuit to obtain a converted signal, and input the converted information into the half-bridge circuit to obtain a drive signal; The conversion unit is used to send the driving signal to the resonant circuit and couple it to the line transmission circuit through the transformer, and transmit the driving signal to the signal receiving circuit through the transmission circuit, so that the receiving circuit sends the driving signal to the signal conditioning circuit through the filter circuit to obtain a carrier signal; The sending unit is used to send the carrier signal to the controller of the battery management unit through a second-order active filter.

8. The electrochemical energy storage power station battery management system emergency communication device according to claim 7, characterized in that: The emergency communication data protocol includes an acquisition module address code, a status bit and a check bit.

9. An electrochemical energy storage power station battery management system emergency communication system, wherein: The system includes a low-voltage auxiliary line, an emergency communication device for the battery management system of an electrochemical energy storage power station, and a low-voltage auxiliary power port. Wherein, the electrochemical energy storage power station battery management system emergency communication device is used to execute the electrochemical energy storage power station battery management system emergency communication method according to any one of claims 1 to 4; The low-voltage auxiliary line is connected to the emergency communication device of the battery management system of the electrochemical energy storage power station, and the emergency communication device of the battery management system of the electrochemical energy storage power station is connected to the low-voltage auxiliary power supply port.

10. The electrochemical energy storage power station battery management system emergency communication system according to claim 9, characterized in that: The low-voltage auxiliary line is used to supply power to the emergency communication device of the battery management system of the electrochemical energy storage power station; The emergency communication device of the battery management system of the electrochemical energy storage power station is used to collect the data transmission status of the battery cluster management unit of the normal channel, and judge whether to start the emergency communication channel for communication, wherein the data transmission status includes the normal state of sending data and the fault state of sending data. If the data transmission status is the fault state of sending data, the emergency communication channel is started to transmit data, and the acquisition module address code of the faulty battery management unit and the high-voltage box signal is collected and saved, and the acquisition module address code is stored in an array, and the acquisition module address code in the array is sequentially sent to the battery management unit, so that the battery management unit makes a judgment according to the acquisition module address code and uploads the fault information to the battery cluster management unit. If the data transmission status is the normal state of sending data, the emergency communication is not started; The low-voltage auxiliary power port is used to send the collected signals of the electrochemical energy storage power station battery management system emergency communication device to the controller through the electrochemical energy storage power station battery management system emergency communication device.

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