Fast response method and system for energy storage battery faults

Abstract

The present invention discloses a method for quickly responding to energy storage battery faults, including the steps of: S1, performing high-voltage power-off under non-undervoltage faults; S2, performing high-voltage power-off under undervoltage faults; and S3, performing high-voltage power-off at low temperatures. During charging, it is necessary to judge that when a low-temperature level 1 fault is triggered, first reduce the charging power to 0% and disable charging. The energy storage battery fault quick response method and system provided by the embodiments of the present invention can execute different power-off control strategies based on different situations such as the high-voltage process under non-undervoltage faults (i.e., normal power-off), the high-voltage process under undervoltage faults (i.e., undervoltage power-off), and power-off at low temperatures, and send a request to the EMS according to the current battery state information of the energy storage battery to control the PCS to perform corresponding operations on the energy storage battery and control the closing or opening of the main positive relay and the main negative relay, thereby achieving a fast and accurate response to energy storage battery faults.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage batteries, and particularly to a method and system for quickly responding to energy storage battery failures. Background Art

[0002] Currently, in the technical field of energy storage batteries, the existing technology mainly focuses on researching how to reduce relay adhesion during the power-off process so as to protect the relay. For example: The Chinese patent with the application number 2020115317414 discloses a power-off method and system for extending the life of vehicle relays, which can protect the safety of the relay. However, it does not incorporate the ideas of formulating power-off control strategies based on different factors such as the battery being in a non-undervoltage fault, the battery being in an undervoltage fault, and low temperature, resulting in the inability to respond quickly and accurately to energy storage battery failures. Summary of the Invention

[0003] The purpose of the present invention is to provide a method and system for quickly responding to energy storage battery failures, which can effectively solve the above-mentioned technical problems existing in the prior art.

[0004] On the one hand, the embodiment of the present application discloses a method for quickly responding to energy storage battery failures, including the steps of:

[0005] S1. Perform high-voltage power-off under non-undervoltage faults, when:

[0006] S11. When power supply is lost, the BMS loses power supply, and the main positive and main negative relays are directly disconnected, and the BMS cannot control;

[0007] S12. When the normal power is on, the switch needs to be pressed to generate a wake-up signal for high-voltage power-off; the BMS needs to first request that all powers be zero, send a power-off instruction with a charge prohibition and discharge prohibition flag to the PCS, and wait until the loop current ≤ 5A, and then disconnect all relays; among them, the longest time from detecting the power-off signal to disconnecting all relays does not exceed 5 seconds;

[0008] S13. When detecting a serious fault that requires disconnecting the relay, the BMS needs to first request that all powers be zero, send a power-off instruction with a charge prohibition and discharge prohibition flag to the PCS, and wait until the loop current ≤ 5A, and then disconnect all relays; among them, the longest time from detecting the power-off signal to disconnecting all relays does not exceed 5 seconds;

[0009] S2. Perform high-voltage power-off under undervoltage faults, when:

[0010] S21. When the detected current ≤ -2A and lasts for 10S, immediately disconnect the main positive and main negative relays;

[0011] S22. When the detected current ≤ -10A and lasts for 3S, immediately disconnect the main positive and main negative relays;

[0012] When the detected current < 2A, the main positive and main negative relays are disconnected with a maximum delay of 5 minutes.

[0013] When the detected current ≥ 2A, the main positive and main negative relays are kept closed and dormancy is prohibited.

[0014] Among them, the above steps S21, S22, S23, and S24 are continuously executed when the undervoltage fault has not been released.

[0015] S3. Perform high-voltage power-off at low temperature. During charging, it is necessary to judge. When a low-temperature level 1 fault is triggered, first reduce the charging power to 0% and disable charging. When:

[0016] S31. When the charging current ≥ 2A and lasts for 3S, the main positive and main negative relays are immediately disconnected.

[0017] S32. When the charging current < 2A, the main positive and main negative relays are kept closed.

[0018] As an improvement to the above solution, the undervoltage fault includes single-cell low fault or total voltage low fault.

[0019] As an improvement to the above solution, when performing step S2, it is not necessary to judge whether the energy storage battery is in the charging or discharging state.

[0020] As an improvement to the above solution, in steps S1 - S3, when performing the relay disconnection operation, the disconnected relays include the main positive relay and the main negative relay, and the main positive relay and the main negative relay can be disconnected simultaneously or successively.

[0021] On the other hand, the embodiment of the present application discloses a fast response system for energy storage battery faults, which includes an energy storage battery, a main positive relay, a main negative relay, a BMS, a VCU, a PCS, and an EMS. The main positive relay is connected between the positive electrode of the energy storage battery and the load, the main negative relay is connected between the negative electrode of the energy storage battery and the load, the PCS is respectively connected to the EMS and the energy storage battery, and the BMS is respectively connected to the energy storage battery, the main positive relay, the main negative relay, the VCU, and the EMS. When the BMS receives the power-off instruction sent by the VCU, it sends a request to the EMS according to the current battery state information of the energy storage battery to control the PCS to perform corresponding operations on the energy storage battery and control the closing or disconnection of the main positive relay and the main negative relay, including:

[0022] Perform high-voltage power-off under non-undervoltage faults. When:

[0023] When power supply is lost, the BMS loses power supply, the main positive and main negative relays are directly disconnected, and the BMS cannot perform control.

[0024] When there is constant power supply, the switch needs to be pressed to generate a wake-up signal for high-voltage power-down; the BMS needs to first request that all powers be 0, send a power-down instruction with charge and discharge prohibition flags to the PCS, and wait until the loop current ≤ 5A, then disconnect all relays; among them, the longest time from detecting the power-down signal to disconnecting all relays does not exceed 5 seconds;

[0025] When detecting a serious fault that requires disconnecting the relay, the BMS needs to first request that all powers be 0, send a power-down instruction with charge and discharge prohibition flags to the PCS, and wait until the loop current ≤ 5A, then disconnect all relays; among them, the longest time from detecting the power-down signal to disconnecting all relays does not exceed 5 seconds;

[0026] During high-voltage power-down under under-voltage fault, when:

[0027] When the detected current ≤ -2A and lasts for 10S, immediately disconnect the main positive and main negative relays;

[0028] When the detected current ≤ -10A and lasts for 3S, immediately disconnect the main positive and main negative relays;

[0029] When the detected current < 2A, the disconnection of the main positive and main negative relays is delayed by up to 5 minutes;

[0030] When the detected current ≥ 2A, keep the main positive and main negative relays closed and prohibit dormancy;

[0031] Among them, the above detection process is continuously executed when the under-voltage fault is not released;

[0032] During high-voltage power-down at low temperature, during the charging state, it is necessary to judge that when triggering a low-temperature level 1 fault, first reduce the charging power to 0% and disable charging, when:

[0033] When the charging current ≥ 2A and lasts for 3S, immediately disconnect the main positive and main negative relays;

[0034] When the charging current < 2A, keep the main positive and main negative relays closed.

[0035] As an improvement to the above solution, the under-voltage fault includes single-cell low fault or total voltage low fault.

[0036] As an improvement to the above solution, when performing high-voltage power-down under under-voltage fault, there is no need to judge whether the energy storage battery is in the charging or discharging state.

[0037] As an improvement to the above solution, when performing the action of disconnecting the relay, the relays to be disconnected include the main positive relay and the main negative relay, and the main positive relay and the main negative relay can be disconnected simultaneously or successively.

[0038] In another aspect, embodiments of the present application disclose an electronic device, which includes a processor and a memory. The memory is used to store a computer program, and the computer program includes program instructions. The processor is configured to execute the energy storage battery fault rapid response method described in any of the above embodiments.

[0039] In another aspect, embodiments of the present application disclose a computer program product or a computer program. The computer program product or the computer program includes computer instructions, and the computer instructions are stored in a computer-readable storage medium. The processor of the computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes the energy storage battery fault rapid response method described in any of the above embodiments.

[0040] Compared with the prior art, the energy storage battery fault rapid response method and system provided by embodiments of the present invention can execute different power-off control strategies based on different situations such as the high-voltage process under non-undervoltage faults (i.e., normal power-off), the high-voltage process under undervoltage faults (i.e., undervoltage power-off), and low-temperature power-off. According to the current battery state information of the energy storage battery, a request is sent to the EMS to control the PCS to perform corresponding operations on the energy storage battery and control the closing or opening of the main positive relay and the main negative relay, so as to achieve a rapid and accurate response to energy storage battery faults. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions of the present invention, the drawings required for implementation will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0042] Figure 1 It is a flowchart of the energy storage battery fault rapid response method provided by an embodiment of the present invention.

[0043] Figure 2 It is a schematic diagram of the energy storage battery fault rapid response system of an embodiment of the present invention.

[0044] Figure 3 It is a schematic structural diagram of the electronic device of an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0045] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0046] Reference Figure 1 , the embodiment of the present invention provides a method for quickly responding to energy storage battery failures, including the steps:

[0047] S1. Perform high-voltage power-down under non-undervoltage faults when:

[0048] S11. When power supply is lost, the BMS loses power supply, the main positive and main negative relays are directly disconnected, and the BMS cannot perform control;

[0049] S12. When normal power is present, press the switch to generate a wake-up signal for high-voltage power-down; the BMS needs to first request that all powers be 0, send a power-down command with a charge and discharge prohibition flag to the PCS, and wait until the loop current ≤ 5A, then disconnect all relays; among them, the longest time from detecting the power-down signal to disconnecting all relays does not exceed 5 seconds;

[0050] S13. When detecting a serious fault that requires the relay to be disconnected, the BMS needs to first request that all powers be 0, send a power-down command with a charge and discharge prohibition flag to the PCS, and wait until the loop current ≤ 5A, then disconnect all relays; among them, the longest time from detecting the power-down signal to disconnecting all relays does not exceed 5 seconds;

[0051] S2. Perform high-voltage power-down under undervoltage faults when:

[0052] S21. When detecting that the current ≤ -2A and lasts for 10S, immediately disconnect the main positive and main negative relays;

[0053] S22. When detecting that the current ≤ -10A and lasts for 3S, immediately disconnect the main positive and main negative relays;

[0054] S23. When detecting that the current < 2A, the disconnection of the main positive and main negative relays is delayed by at most 5 minutes;

[0055] S24. When detecting that the current ≥ 2A, keep the main positive and main negative relays closed and prohibit dormancy;

[0056] Among them, the above steps S21, S22, S23, and S24 are continuously executed when the undervoltage fault is not released;

[0057] S3. Perform high-voltage power-down at low temperature. During charging, it is necessary to judge that when a low-temperature level 1 fault is triggered, first reduce the charging power to 0%, and disable charging when:

[0058] S31. If the charging current is ≥2A and lasts for 3S, then immediately disconnect the main positive and main negative relays.

[0059] S32. If the charging current is <2A, then keep the main positive and main negative relays closed.

[0060] Here, in this embodiment, "power-off" means that when the mains power (i.e., industrial frequency 220V AC power) is cut off, the battery discharges to a certain depth, the DC voltage of the system is lower than a certain threshold, and the load DC contactor is controlled to disconnect, cutting off the power supply circuit where part or all of the loads (i.e., communication equipment) are located.

[0061] In addition, battery under-voltage means that the voltage provided by the battery is lower than its rated voltage, resulting in the battery being unable to work properly. For all electrical equipment, there is a rated voltage. However, in actual operation, the voltage cannot be completely guaranteed to work at the rated voltage, but fluctuates within a range near the rated voltage, generally required to be within ±15%. If the voltage is lower than -15%, it is called under-voltage.

[0062] It can be understood that in this embodiment, detecting the "battery voltage" is not the only power-off condition, and other "power-off" modes can also be included, such as: "remaining battery capacity" and "power-off time".

[0063] In the step S13, the serious faults that require disconnecting the relays include the emergency stop fault, which is effective when the BMS detects that the emergency stop switch is closed. The BMS needs to first request all powers to be 0, send a power-off command with a charge and discharge prohibition flag to the PCS, and wait until the loop current ≤5A, and then disconnect all relays; among them, the longest time from detecting the power-off signal to disconnecting all relays does not exceed 5 seconds.

[0064] In the step S2, the under-voltage faults include single-cell low fault or total voltage low fault.

[0065] Furthermore, when executing the step S2, there is no need to judge whether the energy storage battery is in the charging or discharging state.

[0066] Furthermore, in steps S1 - S3, when performing the action of disconnecting the relays, the relays to be disconnected include the main positive relay and the main negative relay, which can be disconnected simultaneously or successively.

[0067] It can be understood that in this embodiment, executing power reduction means reducing the power to this value. For example: 50% means reducing the current to 50% of the previous current, and 50A means reducing the current to 50A; executing under high voltage means performing the corresponding under high voltage process. Charge and discharge enable: "-" means enabling the corresponding charge and discharge flag bit, and "disable" means disabling the corresponding charge and discharge flag bit.

[0068] ReferenceFigure 2 , this embodiment of the present application discloses a fast response system for energy storage battery faults, which includes an energy storage battery 11, a main positive relay 12, a main negative relay 13, a battery management system BMS 14, a vehicle controller VCU 15, a power conversion system PCS 16 and an energy management system EMS 17. The main positive relay 12 is connected between the positive electrode of the energy storage battery 11 and the load 20, and the main negative relay 13 is connected between the negative electrode of the energy storage battery 11 and the load 20. The PCS 16 is respectively connected to the EMS 14 and the energy storage battery 11, and the BMS 14 is respectively connected to the energy storage battery 11, the main positive relay 12, the main negative relay 13, the VCU 15 and the EMS 17. When the BMS 14 receives the power-off instruction sent by the VCU 15, it sends a request to the EMS 17 according to the current battery state information of the energy storage battery 11 to control the PCS 16 to perform corresponding operations on the energy storage battery 11 and control the closing or opening of the main positive relay 121 and the main negative relay 3, including:

[0069] Perform high-voltage power-off under non-undervoltage faults when:

[0070] When power supply is lost, the BMS 14 loses power supply, the main positive and main negative relays are directly disconnected, and the BMS cannot control;

[0071] When normal power is available, press the switch to generate a wake-up signal for high-voltage power-off; the BMS needs to first request that all powers be 0, send a power-off instruction with a charge and discharge prohibition flag to the PCS, and wait until the loop current ≤ 5A, then disconnect all relays; among them, the longest time from detecting the power-off signal to disconnecting all relays does not exceed 5 seconds;

[0072] When detecting a serious fault that requires disconnecting the relay, the BMS needs to first request that all powers be 0, send a power-off instruction with a charge and discharge prohibition flag to the PCS, and wait until the loop current ≤ 5A, then disconnect all relays; among them, the longest time from detecting the power-off signal to disconnecting all relays does not exceed 5 seconds;

[0073] Perform high-voltage power-off under undervoltage faults when:

[0074] When the detected current ≤ -2A and lasts for 10S, immediately disconnect the main positive and main negative relays;

[0075] When the detected current ≤ -10A and lasts for 3S, immediately disconnect the main positive and main negative relays;

[0076] When the detected current < 2A, the disconnection of the main positive and main negative relays is delayed by at most 5 minutes;

[0077] When the detected current ≥ 2A, keep the main positive and main negative relays closed and prohibit dormancy;

[0078] Among them, the above detection process is continuously executed when the undervoltage fault is not released;

[0079] When performing high-voltage power-off at low temperature, it needs to be judged under the charging state. When a low-temperature level 1 fault is triggered, first reduce the charging power to 0%, and disable charging. When:

[0080] The charging current is ≥2A and lasts for 3S, then immediately disconnect the main positive and main negative relays;

[0081] The charging current <2A, then keep the main positive and main negative relays closed.

[0082] Among them, in this embodiment, "power-off" means that when the mains power (i.e., 220V AC power frequency) is cut off, the battery discharges to a certain depth, the system DC voltage is lower than a certain threshold, and the load DC contactor is controlled to disconnect, cutting off the power supply circuit where part or all of the loads (i.e., communication equipment) are located.

[0083] In addition, battery undervoltage means that the voltage provided by the battery is lower than its rated voltage, resulting in the battery being unable to work properly. For all electrical equipment, there is a rated voltage, but in actual work, the voltage cannot be completely guaranteed to work at the rated voltage, but fluctuates within a range near the rated voltage, generally required to be within ±15%. If the voltage is lower than -15%, it is called undervoltage.

[0084] It can be understood that in this embodiment, detecting the "battery voltage" is not the only power-off condition, and other "power-off" modes can also be included, such as: "battery remaining capacity" and "power-off time".

[0085] Among them, the undervoltage fault includes single-cell low fault or total voltage low fault.

[0086] Furthermore, when performing high-voltage power-off under the undervoltage fault, there is no need to judge whether the energy storage battery is in the charging or discharging state.

[0087] Furthermore, when performing the relay disconnection action, the disconnected relays include the main positive relay and the main negative relay, which can be disconnected simultaneously or successively.

[0088] It can be understood that in this embodiment, performing power reduction means reducing the power to this value. For example: 50% means reducing the current to 50% of the previous current, and 50A means reducing the current to 50A; performing high-voltage down means performing the corresponding high-voltage down process. Charge and discharge enable: "-" means enabling the corresponding charge and discharge flag bit, and "disable" means disabling the corresponding charge and discharge flag bit.

[0089] Such as Figure 3As shown in the figure, an embodiment of the present invention provides an electronic device 300, including a memory 310 and a processor 320. The memory 310 is used to store one or more computer instructions, and the processor 320 is used to call and execute the one or more computer instructions, so as to implement the rapid response method for energy storage battery faults described above.

[0090] That is to say, the electronic device 300 includes: a processor 320 and a memory 310. Computer program instructions are stored in the memory 310. When the computer program instructions are run by the processor, the processor 320 executes the rapid response method for energy storage battery faults described above.

[0091] Furthermore, as Figure 3 shown in the figure, the electronic device 300 further includes a network interface 330, an input device 340, a hard disk 350, and a display device 360.

[0092] The above-mentioned various interfaces and devices can be interconnected through a bus architecture. The bus architecture can include any number of interconnected buses and bridges. Specifically, one or more central processing units (CPUs) represented by the processor 320 and various circuits of one or more memories represented by the memory 310 are connected together. The bus architecture can also connect various other circuits such as peripheral devices, voltage regulators, and power management circuits. It can be understood that the bus architecture is used to realize the connection and communication between these components. In addition to the data bus, the bus architecture also includes a power bus, a control bus, and a status signal bus, which are well-known in the art, so they will not be described in detail herein.

[0093] The network interface 330 can be connected to a network (such as the Internet, a local area network, etc.), obtain relevant data from the network, and can be stored in the hard disk 350.

[0094] The input device 340 can receive various instructions input by an operator and send them to the processor 320 for execution. The input device 340 can include a keyboard or a pointing device (such as a mouse, a trackball, a touchpad, or a touch screen, etc.).

[0095] The display device 360 can display the results obtained by the processor 320 executing instructions.

[0096] The memory 310 is used to store programs and data necessary for the operation of the operating system, as well as data such as intermediate results in the calculation process of the processor 320.

[0097] It can be understood that the memory 310 in the embodiments of the present invention can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory can be a random access memory (RAM), which is used as an external cache. The memory 310 of the devices and methods described herein is intended to include, but is not limited to, these and any other suitable types of memories.

[0098] In some embodiments, the memory 310 stores the following elements, executable modules or data structures, or subsets or extended sets thereof: an operating system 311 and application programs 312.

[0099] Among them, the operating system 311 includes various system programs, such as a framework layer, a core library layer, a driver layer, etc., and is used to implement various basic services and process hardware-based tasks. The application programs 312 include various application programs, such as a browser (Browser), etc., and are used to implement various application services. The program for implementing the method of the embodiments of the present invention can be included in the application programs 312.

[0100] When the above-mentioned processor 320 calls and executes the application programs and data stored in the memory 310, specifically, when it is the programs or instructions stored in the application program 312, S1. Perform high-voltage power-down under non-undervoltage faults. When: S11. When power supply is lost, the BMS loses power supply, the relay directly disconnects, and the BMS cannot perform control; S12. When constant power is available, the switch needs to be pressed to generate a wake-up signal for high-voltage power-down; the BMS needs to first request that all powers be 0, send a power-down instruction with a charge and discharge prohibition flag to the PCS, and wait until the loop current ≤ 5A, then disconnect all relays; among which, the longest time from detecting the power-down signal to disconnecting all relays does not exceed 5 seconds; S13. When a serious fault that requires disconnecting the relay is detected, the BMS needs to first request that all powers be 0, send a power-down instruction with a charge and discharge prohibition flag to the PCS, and wait until the loop current ≤ 5A, then disconnect all relays; among which, the longest time from detecting the power-down signal to disconnecting all relays does not exceed 5 seconds; S2. Perform high-voltage power-down under undervoltage faults. When: S21. When the detected current ≤ -2A and lasts for 10S, immediately disconnect the main positive and main negative relays; S22. When the detected current ≤ -10A and lasts for 3S, immediately disconnect the main positive and main negative relays; S23. When the detected current < 2A, the disconnection of the main positive and main negative relays is delayed by at most 5 minutes; S24. When the detected current ≥ 2A, keep the main positive and main negative relays closed and prohibit dormancy; among which, the above steps S21, step S22, step S23, and step S24 are continuously executed when the undervoltage fault is not released; S3. Perform high-voltage power-down at low temperatures. Under the charging state, it needs to be judged. When a low-temperature level 1 fault is triggered, first reduce the charging power to 0% and disable charging. When: S31. When the charging current ≥ 2A and lasts for 3S, immediately disconnect the main positive and main negative relays; S32. When the charging current < 2A, keep the main positive and main negative relays closed.

[0101] The energy storage battery fault rapid response method disclosed in the above embodiments of the present invention can be applied to the processor 320 or implemented by the processor 320. The processor 320 may be an integrated circuit chip with signal processing capabilities.

[0102] In the implementation process, each step of the above method can be completed by the integrated logic circuit of the hardware in the processor 320 or the instructions in the form of software. The above-mentioned processor 320 can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and can implement or execute the various methods, steps and logic block diagrams disclosed in the embodiments of the present invention. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc. The steps of the method disclosed in combination with the embodiments of the present invention can be directly embodied as being executed and completed by the hardware decoding processor, or executed and completed by the combination of the hardware and software modules in the decoding processor. The software module can be located in a mature storage medium in the art such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. This storage medium is located in the memory 310, and the processor 320 reads the information in the memory 310 and combines its hardware to complete the steps of the above method.

[0103] It can be understood that these embodiments described herein can be implemented using hardware, software, firmware, middleware, microcode, or a combination thereof. For hardware implementation, the processing unit can be implemented in one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), general-purpose processors, controllers, microcontrollers, microprocessors, other electronic units for performing the functions described in this application, or a combination thereof.

[0104] For software implementation, the techniques described herein can be implemented by modules (such as procedures, functions, etc.) that execute the functions described herein. The software code can be stored in a memory and executed by a processor. The memory can be implemented inside or outside the processor.

[0105] Specifically, the processor 320 is further configured to read the computer program and execute any one of the above-mentioned energy storage battery fault fast response methods.

[0106] This application also provides a computer-readable storage medium, where the computer-readable storage medium stores a computer program, the computer program includes program instructions, and when the program instructions are executed by a processor, the processor is caused to execute the above method, such as the method executed by the above-mentioned electronic device, which will not be elaborated here.

[0107] Optionally, the storage medium involved in this application, such as a computer-readable storage medium, can be non-volatile or volatile.

[0108] Optionally, the computer-readable storage medium may mainly include a program storage area and a data storage area. Among them, the program storage area may store an operating system, application programs required for at least one function, etc.; the data storage area may store data created according to the use of the blockchain node, etc. Among them, the blockchain referred to in this application is a new application mode of computer technologies such as distributed data storage, peer-to-peer transmission, consensus mechanism, and encryption algorithm. Blockchain, in essence, is a decentralized database, a series of data blocks generated by using cryptographic methods. Each data block contains information about a batch of network transactions, which is used to verify the validity of the information (anti-counterfeiting) and generate the next block. The blockchain may include a blockchain underlying platform, a platform product service layer, an application service layer, etc.

[0109] It should be noted that for the foregoing method embodiments, for the sake of simple description, they are all expressed as a series of action combinations. However, those skilled in the art should know that this application is not limited by the described action sequence. Because according to this application, some steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily essential to this application.

[0110] In several embodiments provided by this application, it should be understood that the disclosed methods and devices can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point, the displayed or discussed coupling or direct coupling or communication connection between each other can be through some interfaces. The indirect coupling or communication connection of the device or unit can be in electrical, mechanical or other forms.

[0111] In addition, in each embodiment of the present invention, the functional units can be integrated into one processing unit, or each unit can be physically included separately, or two or more units can be integrated into one unit. The above integrated unit can be implemented in the form of hardware, or in the form of hardware plus software functional units.

[0112] The integrated unit implemented in the form of software functional units can be stored in a computer-readable storage medium. The above-mentioned software functional units are stored in a storage medium and include several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute some steps of the transceiver method described in various embodiments of the present invention. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROM), random access memories (RAM), magnetic disks, or optical discs that can store program codes.

[0113] In summary, the fast response method and system for energy storage battery faults provided by the embodiments of the present invention can execute different power-off control strategies based on different situations such as the high-voltage process under non-undervoltage faults (i.e., normal power-off), the high-voltage process under undervoltage faults (i.e., undervoltage power-off), and low-temperature power-off, send a request to the EMS according to the current battery state information of the energy storage battery to control the PCS to perform corresponding operations on the energy storage battery, and control the closing or opening of the main positive relay and the main negative relay, so as to achieve a fast and accurate response to energy storage battery faults.

[0114] The above-disclosed are only some preferred embodiments of the present invention. Of course, the scope of rights of the present invention cannot be limited thereby. Those of ordinary skill in the art can understand the implementation of all or part of the above processes and the equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. A method for rapid response to energy storage battery failure, characterized in that: Including steps: S1. Execute high voltage power-off in non-undervoltage fault conditions, when: S11: When power is lost, the BMS loses power, the total positive and total negative relays are directly disconnected, and the BMS cannot be controlled; S12: When power is always on, the switch needs to be pressed to generate a high-voltage power-off wake-up signal. The BMS needs to first request that all power levels be 0, send a power-off command with a charge and discharge prohibition flag to the PCS, and wait until the loop current is ≤5A before disconnecting all relays. The maximum time from detecting the power-off signal to disconnecting all relays is no more than 5 seconds. S13: When a serious fault is detected that requires disconnecting the relays, the BMS needs to first request that all powers be 0, send a power-off command with a charge and discharge prohibition flag to the PCS, and wait until the loop current is ≤5A before disconnecting all relays. The maximum time from detecting the power-off signal to disconnecting all relays shall not exceed 5 seconds. S2: Execute high voltage power-off under undervoltage fault, when: S21: If the current is detected to be ≤-2A and lasts for 10S, the total positive and total negative relays will be disconnected immediately; S22: If the current is detected to be ≤-10A and lasts for 3S, the total positive and total negative relays will be disconnected immediately; S23, when the current is detected to be less than 2A, the total positive and total negative relays will be disconnected after a maximum delay of 5 minutes; S24: When the current is detected to be ≥2A, the total positive and total negative relays are kept closed and sleep is prohibited; Wherein, the above steps S21, S22, S23 and S24 are always executed when the undervoltage fault is not released; S3: Execute high voltage power-off at low temperature. It is necessary to judge during charging state. When a low temperature level 1 fault is triggered, the charging power is first reduced to 0% and charging is disabled. When: S31, charging ≥ 2A and lasting for 3S, immediately disconnect the total positive and total negative relays; S32, if charging is less than 2A, keep the total positive and total negative relays closed.

2. The method for rapid response to energy storage battery failure according to claim 1, characterized in that: The undervoltage fault includes a single-cell low voltage fault or a total low voltage fault.

3. The method for rapid response to energy storage battery failure according to claim 1, characterized in that: When executing step S2, it is not necessary to determine whether the energy storage battery is in a charging or discharging state.

4. The method for rapid response to energy storage battery failure according to claim 1, characterized in that: In steps S1 to S3 , when the relay disconnection action is executed, the disconnected relays include the total positive relay and the total negative relay, which may be disconnected simultaneously or successively.

5. A rapid response system for energy storage battery failure, characterized in that: The system includes an energy storage battery, a total positive relay, a total negative relay, a BMS, a VCU, a PCS, and an EMS. The total positive relay is connected between the positive electrode of the energy storage battery and the load, the total negative relay is connected between the negative electrode of the energy storage battery and the load, the PCS is connected to the EMS and the energy storage battery respectively, and the BMS is connected to the energy storage battery, the total positive relay, the total negative relay, the VCU, and the EMS respectively. When the BMS receives a power-off instruction sent by the VCU, it sends a request to the EMS according to the current battery status information of the energy storage battery to control the PCS to perform corresponding operations on the energy storage battery and control the closing or opening of the total positive relay and the total negative relay, including: To perform high voltage power-down in non-undervoltage fault conditions, when: When power is lost, the BMS loses power, the total positive and total negative relays are directly disconnected, and the BMS cannot perform control; If the power is always on, press the switch to generate a high-voltage power-off wake-up signal. The BMS first requests that all power levels be reduced to 0, sends a power-off command with a charge and discharge prohibition flag to the PCS, and then disconnects all relays after the loop current is ≤5A. The maximum time from detecting the power-off signal to disconnecting all relays is no more than 5 seconds. When a serious fault is detected that requires disconnecting the relays, the BMS first requests that all power be reduced to 0, sends a power-off command with a charge and discharge prohibition flag to the PCS, and waits until the loop current is ≤5A before disconnecting all relays. The maximum time from detecting the power-off signal to disconnecting all relays is no more than 5 seconds. High voltage power-off is executed during an undervoltage fault when: If the current is detected to be ≤-2A and lasts for 10S, the total positive and total negative relays will be disconnected immediately; If the current is detected to be ≤-10A and lasts for 3S, the total positive and total negative relays will be disconnected immediately; When the current is detected to be less than 2A, the total positive and negative relays will be disconnected after a maximum delay of 5 minutes; When the current is detected to be ≥2A, the total positive and total negative relays are kept closed and sleep is prohibited; The above detection process is always executed when the undervoltage fault is not released; High voltage power-off is performed at low temperatures. A judgment is required during charging. When a low temperature level 1 fault is triggered, charging power is first reduced to 0% and charging is disabled. When: If the charging current is ≥2A and lasts for 3S, the total positive and total negative relays will be disconnected immediately; If the charging current is less than 2A, keep the total positive and total negative relays closed.

6. The energy storage battery failure rapid response system according to claim 5, characterized in that: The undervoltage fault includes a single-cell low voltage fault or a total voltage low fault.

7. The energy storage battery failure rapid response system according to claim 5, characterized in that: When performing high voltage power-off under an undervoltage fault, there is no need to determine whether the energy storage battery is in a charging or discharging state.

8. The energy storage battery failure rapid response system according to claim 5, characterized in that: When the relay disconnection action is executed, the disconnected relays including the total positive relay and the total negative relay can be disconnected simultaneously or successively.

9. An electronic device, characterized in that: It includes a processor and a memory, wherein the memory is used to store a computer program, the computer program includes program instructions, and the processor is configured to call the program instructions to execute the energy storage battery failure rapid response method according to any one of claims 1 to 4.

10. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program, which includes program instructions. When the program instructions are executed by a processor, the processor executes the method for rapid response to energy storage battery failure according to any one of claims 1 to 4.

Images