Energy storage battery fault quick response method and system

Abstract

The invention discloses an energy storage battery fault quick response method. The method comprises the following steps: S1, executing high-voltage power-off under a non-undervoltage fault; s2, high-voltage power-off is executed under the undervoltage fault; and S3, high-voltage power-off is executed at low temperature, and when a low-temperature first-level fault needs to be judged and triggered in the charging state, the power is firstly reduced to 0% through charging, and charging is forbidden. According to the energy storage battery fault quick response method and system provided by the embodiment of the invention, different power-off control strategies can be executed based on different situations such as a high-voltage process (namely normal power-off) under a non-undervoltage fault, a high-voltage process (namely undervoltage power-off) under an undervoltage fault, low-temperature power-off and the like; and sending a request to the EMS according to the current battery state information of the energy storage battery so as to control the PCS to execute corresponding operation on the energy storage battery and control on or off of the total positive relay and the total negative relay, thereby realizing rapid and accurate response to the fault of the energy storage battery.

Description

Technical Field

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

[0002] At present, in the field of energy storage battery technology, the existing technology is mainly devoted to studying how to reduce relay adhesion and protect the relay during the power-off process. For example: Chinese patent application number 2020115317414 discloses a power-off method and system for extending the life of the vehicle relay, which can protect the safety of the relay, but it does not include different factors such as battery non-undervoltage fault, battery undervoltage fault and low temperature into the idea of ​​formulating the power-off control strategy, resulting in the inability to respond quickly and accurately to energy storage battery failures. Summary of the invention

[0003] The object of the present invention is to provide a method and system for rapid response to energy storage battery failure, 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 rapid response to energy storage battery failure, comprising the steps of:

[0005] S1. Execute high voltage power-off under non-undervoltage fault conditions, when:

[0006] 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;

[0007] S12: When the 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 is 0, send a power-off command with a charge and discharge prohibition mark to the PCS, and disconnect all relays after the loop current is ≤5A; the longest time from detecting the power-off signal to disconnecting all relays is no more than 5 seconds;

[0008] S13: When a serious fault that requires disconnecting the relay is detected, the BMS needs to first request that all power is 0, send a power-off command with a charge and discharge prohibition mark to the PCS, and disconnect all relays after the loop current is ≤5A. The longest time from detecting the power-off signal to disconnecting all relays is no more than 5 seconds.

[0009] S2: Execute high voltage power-off under undervoltage fault, when:

[0010] S21, if the current is detected to be ≤-2A and lasts for 10S, the total positive and total negative relays will be disconnected immediately;

[0011] S22: If the current is detected to be ≤-10A and lasts for 3S, the total positive and negative relays will be disconnected immediately;

[0012] S23, 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;

[0013] S24, when the current is detected to be ≥2A, the total positive and total negative relays are kept closed and sleep is prohibited;

[0014] Wherein, the above steps S21, S22, S23 and S24 are always executed when the undervoltage fault is not released;

[0015] S3: Execute high voltage power-down at low temperature. It is necessary to judge in the charging state. When the low temperature level 1 fault is triggered, the charging power is first reduced to 0%, and charging is disabled. When:

[0016] S31, charging ≥ 2A and lasting for 3S, immediately disconnect the total positive and total negative relays;

[0017] S32, if charging is less than 2A, keep the total positive and total negative relays closed.

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

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

[0020] As an improvement of the above scheme, in steps S1 to S3, when executing the relay disconnection action, the disconnected relays include the total positive relay and the total negative relay, and the total positive relay and the total negative relay can be disconnected simultaneously or successively.

[0021] On the other hand, an embodiment of the present application discloses a rapid response system for energy storage battery failure, which includes an energy storage battery, a total positive relay, a total negative relay, a BMS, a VCU, a PCS and an EMS, wherein 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:

[0022] To perform high voltage power down in non-undervoltage fault conditions, when:

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

[0024] When the power is always 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 power is 0, send a power-off instruction with a charge and discharge prohibition mark to the PCS, and disconnect all relays after the loop current is ≤5A. The longest time from detecting the power-off signal to disconnecting all relays is no more than 5 seconds.

[0025] When a serious fault that requires disconnecting the relay is detected, the BMS needs to first request that all power is 0, send a power-off command with a charge and discharge prohibition flag to the PCS, and disconnect all relays after the loop current is ≤5A. The longest time from detecting the power-off signal to disconnecting all relays is no more than 5 seconds.

[0026] High voltage power-down is performed during an undervoltage fault when:

[0027] If the current is detected to be ≤-2A and lasts for 10S, the total positive and negative relays will be disconnected immediately;

[0028] If the current is detected to be ≤-10A and lasts for 3S, the total positive and negative relays will be disconnected immediately;

[0029] When the current is detected to be less than 2A, the total positive and negative relays will be disconnected after a delay of up to 5 minutes;

[0030] When the current is detected to be ≥2A, the total positive and negative relays are kept closed and sleep is prohibited;

[0031] The above detection process is always executed when the undervoltage fault is not released;

[0032] High voltage power-off is performed at low temperature. It is necessary to judge during charging. When a low temperature level 1 fault is triggered, the charging power is first reduced to 0%, and charging is disabled. When:

[0033] If the charging current is ≥2A and lasts for 3S, the total positive and negative relays will be disconnected immediately;

[0034] If the charging current is less than 2A, keep the total positive and total negative relays closed.

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

[0036] As an improvement to the above solution, when high voltage power-off is performed under an undervoltage fault, it is not necessary to determine whether the energy storage battery is in a charging or discharging state.

[0037] As an improvement of the above solution, when executing the relay disconnection action, the disconnected relays include the total positive relay and the total negative relay, and the total positive relay and the total negative relay can be disconnected simultaneously or successively.

[0038] On the other hand, an embodiment of the present application discloses an electronic device, which 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 execute the energy storage battery failure rapid response method as described in any of the above embodiments.

[0039] In another aspect, an embodiment of the present application discloses a computer program product or a computer program, wherein the computer program product or the computer program includes computer instructions, and the computer instructions are stored in a computer-readable storage medium. A processor of a 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 as described in any of the above embodiments.

[0040] Compared with the prior art, the embodiment of the present invention provides a method and system for rapid response to energy storage battery faults, which 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, and 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, thereby achieving rapid and accurate response to energy storage battery faults. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the implementation mode will be briefly introduced below. Obviously, the drawings described below are only some implementation modes of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0042] Figure 1 A flowchart of a method for rapid response to energy storage battery failure provided in an embodiment of the present invention.

[0043] Figure 2 Schematic diagram of a rapid response system for energy storage battery failure according to an embodiment of the present invention.

[0044] Figure 3 FIG. 4 is a schematic diagram of the structure of an electronic device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0045] 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.

[0046] refer to Figure 1 The embodiment of the present invention provides a method for rapid response to energy storage battery failure, comprising the steps of:

[0047] S1. Execute high voltage power-off under non-undervoltage fault conditions, when:

[0048] 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;

[0049] S12: When the 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 is 0, send a power-off command with a charge and discharge prohibition mark to the PCS, and disconnect all relays after the loop current is ≤5A; the longest time from detecting the power-off signal to disconnecting all relays is no more than 5 seconds;

[0050] S13: When a serious fault that requires disconnecting the relay is detected, the BMS needs to first request that all power is 0, send a power-off command with a charge and discharge prohibition mark to the PCS, and disconnect all relays after the loop current is ≤5A. The longest time from detecting the power-off signal to disconnecting all relays is no more than 5 seconds.

[0051] S2: Execute high voltage power-off under undervoltage fault, when:

[0052] S21, if the current is detected to be ≤-2A and lasts for 10S, the total positive and total negative relays will be disconnected immediately;

[0053] S22: If the current is detected to be ≤-10A and lasts for 3S, the total positive and negative relays will be disconnected immediately;

[0054] S23, 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;

[0055] S24, when the current is detected to be ≥2A, the total positive and total negative relays are kept closed and sleep is prohibited;

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

[0057] S3: Execute high voltage power-down at low temperature. It is necessary to judge in the charging state. When the low temperature level 1 fault is triggered, the charging power is first reduced to 0%, and charging is disabled. When:

[0058] S31, charging ≥ 2A and lasting for 3S, immediately disconnect the total positive and total negative relays;

[0059] S32, if charging is less than 2A, keep the total positive and total negative relays closed.

[0060] Among them, in this embodiment, "power off" means that when the city power (i.e., industrial frequency 220V AC power) is cut off, the battery discharge reaches 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 load (i.e., communication equipment) is located.

[0061] In addition, battery undervoltage means that the voltage provided by the battery is lower than its rated voltage, causing the battery to fail to work properly. For all electrical equipment, there is a rated voltage, but in actual work, the voltage cannot be 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.

[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 may also be included, such as "remaining battery capacity" and "power-off time".

[0063] In step S13, serious faults that require disconnection of relays include emergency stop faults, which are effective when the BMS detects that the emergency stop switch is closed. The BMS needs to first request that all powers be 0, send a power-off instruction with a charge and discharge prohibition mark to the PCS, and wait for the loop current to be ≤5A before disconnecting all relays; wherein, the longest time from detecting the power-off signal to disconnecting all relays is no more than 5 seconds.

[0064] In the step S2, the undervoltage fault includes a single cell low voltage fault or a total voltage low fault.

[0065] Furthermore, when executing step S2, it is not necessary to determine whether the energy storage battery is in a charging or discharging state.

[0066] Furthermore, in steps S1 to S3, when the relay disconnection action is executed, the disconnected relays including the total positive relay and the total negative relay may be disconnected simultaneously or successively.

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

[0068] refer to Figure 2 The embodiment of the present application discloses a rapid response system for energy storage battery failure, which includes an energy storage battery 11, a total positive relay 12, a total negative relay 13, a battery management system BMS14, a vehicle controller VCU15, an energy storage converter PCS16 and an energy management system EMS17, wherein the total positive relay 12 is connected between the positive electrode of the energy storage battery 11 and the load 20, the total negative relay 13 is connected between the negative electrode of the energy storage battery 11 and the load 20, the PCS16 is connected to the EMS14 and the energy storage battery 11 respectively, the BMS14 is connected to the energy storage battery 11, the total positive relay 12, the total negative relay 13, VCU15 and EMS17 respectively, when the BMS14 receives the power-off instruction sent by the VCU15, it sends a request to the EMS17 according to the current battery status information of the energy storage battery 11 to control the PCS16 to perform corresponding operations on the energy storage battery 11 and control the closing or disconnection of the total positive relay 121 and the total negative relay 3, including:

[0069] To perform high voltage power down in non-undervoltage fault conditions, when:

[0070] When power is lost, BMS14 loses power, the total positive and total negative relays are directly disconnected, and the BMS cannot be controlled;

[0071] When the power is always 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 power is 0, send a power-off instruction with a charge and discharge prohibition mark to the PCS, and disconnect all relays after the loop current is ≤5A. The longest time from detecting the power-off signal to disconnecting all relays is no more than 5 seconds.

[0072] When a serious fault that requires disconnecting the relay is detected, the BMS needs to first request that all power is 0, send a power-off command with a charge and discharge prohibition flag to the PCS, and disconnect all relays after the loop current is ≤5A. The longest time from detecting the power-off signal to disconnecting all relays is no more than 5 seconds.

[0073] High voltage power-down is performed during an undervoltage fault when:

[0074] If the current is detected to be ≤-2A and lasts for 10S, the total positive and negative relays will be disconnected immediately;

[0075] If the current is detected to be ≤-10A and lasts for 3S, the total positive and negative relays will be disconnected immediately;

[0076] When the current is detected to be less than 2A, the total positive and negative relays will be disconnected after a delay of up to 5 minutes;

[0077] When the current is detected to be ≥2A, the total positive and negative relays are kept closed and sleep is prohibited;

[0078] The above detection process is always executed when the undervoltage fault is not released;

[0079] High voltage power-off is performed at low temperature. It is necessary to judge during charging. When a low temperature level 1 fault is triggered, the charging power is first reduced to 0%, and charging is disabled. When:

[0080] If the charging current is ≥2A and lasts for 3S, the total positive and negative relays will be disconnected immediately;

[0081] If the charging current is less than 2A, keep the total positive and total negative relays closed.

[0082] Among them, in this embodiment, "power off" means that when the city power (i.e., industrial frequency 220V AC power) is cut off, the battery discharge reaches 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 load (i.e., communication equipment) is located.

[0083] In addition, battery undervoltage means that the voltage provided by the battery is lower than its rated voltage, causing the battery to fail to work properly. For all electrical equipment, there is a rated voltage, but in actual work, the voltage cannot be 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 may also be included, such as "remaining battery capacity" and "power-off time".

[0085] The undervoltage fault includes a single-cell low voltage fault or a total low voltage fault.

[0086] Furthermore, when high voltage power-off is performed under an undervoltage fault, it is not necessary to determine whether the energy storage battery is in a charging or discharging state.

[0087] Furthermore, when the relay disconnecting action is executed, the disconnected relays including the total positive relay and the total negative relay may be disconnected simultaneously or successively.

[0088] It can be understood that in this embodiment, executing power reduction means reducing the power to the value, for example: 50% means reducing the current to 50% of the previous current, 50A means reducing the current to 50A; executing high voltage reduction means executing the corresponding high voltage reduction process. Charge and discharge enable: "-" means that the corresponding charge and discharge flag is enabled, and "disable" means that the corresponding charge and discharge flag is disabled.

[0089] like Figure 3As shown, an embodiment of the present invention provides an electronic device 300, including a memory 310 and a processor 320, wherein 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 any of the above-mentioned energy storage battery failure rapid response methods.

[0090] That is, the electronic device 300 includes: a processor 320 and a memory 310, in which computer program instructions are stored, wherein when the computer program instructions are executed by the processor, the processor 320 executes any of the above-mentioned energy storage battery failure rapid response methods.

[0091] Furthermore, if Figure 3 As shown, 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 interfaces and devices can be interconnected through a bus architecture. The bus architecture can be a bus and bridge that can include any number of interconnected buses. Specifically, one or more central processing units (CPUs) represented by processor 320 and various circuits of one or more memories represented by memory 310 are connected together. The bus architecture can also connect various other circuits such as peripheral devices, voltage regulators, and power management circuits together. It can be understood that the bus architecture is used to achieve 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 all 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 save it in the hard disk 350.

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

[0095] The display device 360 ​​can display the result obtained by the processor 320 executing the instruction.

[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 during the calculation process of the processor 320.

[0097] It is understood that the memory 310 in the embodiment of the present invention may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may 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 may be a random access memory (RAM), which is used as an external cache. The memory 310 of the apparatus and method described herein is intended to include, but is not limited to, these and any other suitable types of memory.

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

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

[0100] The processor 320, when calling and executing the application and data stored in the memory 310, specifically, the program or instruction stored in the application 312, S1, performs high-voltage power-off under non-undervoltage fault conditions, when: S11, when power is lost, the BMS loses power, the relay is directly disconnected, and the BMS cannot be controlled; S12, when power is always on, a 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 0, send a power-off instruction with a charge and discharge prohibition mark to the PCS, and wait for the loop current to be ≤5A before disconnecting all relays; wherein, the longest time from detecting the power-off signal to disconnecting all relays is no more than 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-off instruction with a charge and discharge prohibition mark to the PCS, and wait for the loop current to be ≤5A before disconnecting all relays; wherein, the longest time from detecting the power-off signal to disconnecting all relays is no more than 5 seconds. The maximum time for a relay to operate is no more than 5 seconds; S2. Under an undervoltage fault, high-voltage power-off is performed. When: S21. When the current is detected to be ≤-2A and lasts for 10S, the total positive and total negative relays are immediately disconnected; S22. When the current is detected to be ≤-10A and lasts for 3S, the total positive and total negative relays are immediately disconnected; S23. When the current is detected to be <2A, the total positive and total negative relays are 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 dormancy is prohibited; wherein, the above steps S21, S22, S23 and S24 are always executed when the undervoltage fault is not released; S3. Under low temperature, high-voltage power-off is performed. It is necessary to judge in the charging state. When a low-temperature level 1 fault is triggered, the power is first charged to reduce to 0%, and charging is disabled. When: S31. When charging is ≥2A and lasts for 3S, the total positive and total negative relays are immediately disconnected; S32. When charging is <2A, the total positive and total negative relays are kept closed.

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

[0102] In the implementation process, each step of the above method can be completed by the hardware integrated logic circuit or software instructions in the processor 320. The above processor 320 can be a general processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, and can implement or execute the methods, steps and logic block diagrams disclosed in the embodiments of the present invention. The general processor can be a microprocessor or the processor can also be any conventional processor, etc. The steps of the method disclosed in the embodiment of the present invention can be directly embodied as a hardware decoding processor to perform, or the hardware and software modules in the decoding processor are combined to perform. The software module can be located in a mature storage medium in the field 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. The storage medium is located in the memory 310, and the processor 320 reads the information in the memory 310 and completes the steps of the above method in combination with its hardware.

[0103] It is understood that the embodiments described herein can be implemented in 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 the present application or a combination thereof.

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

[0105] Specifically, the processor 320 is further used to read the computer program and execute any of the above-mentioned methods for rapid response to energy storage battery failure.

[0106] The present application also provides a computer-readable storage medium, which stores a computer program. The computer program includes program instructions. When the program instructions are executed by a processor, the processor executes the above method, such as executing the method executed by the above electronic device, which is not repeated here.

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

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

[0109] It should be noted that, for the above-mentioned various method embodiments, for the sake of simplicity of description, they are all expressed as a series of action combinations, but those skilled in the art should be aware that this application is not limited by the order of the actions described, because according to this application, some steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by this application.

[0110] In the several embodiments provided in the present 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 schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

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

[0112] The above-mentioned integrated unit implemented in the form of a software functional unit can be stored in a computer-readable storage medium. The above-mentioned software functional unit is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform some steps of the sending and receiving method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, referred to as ROM), random access memory (Random Access Memory, referred to as RAM), disk or optical disk and other media that can store program codes.

[0113] In summary, the embodiment of the present invention provides a method and system for rapid response to energy storage battery faults, which 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, and 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, thereby achieving rapid and accurate response to energy storage battery faults.

[0114] The above disclosures are only some preferred embodiments of the present invention, which certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiments and equivalent changes made according to the claims of the present invention are still within the scope of the invention.

Claims

1. A method for rapid response to energy storage battery failure, characterized in that: Includes steps: S1. Execute high voltage power-off under 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 the 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 is 0, send a power-off command with a charge and discharge prohibition mark to the PCS, and disconnect all relays after the loop current is ≤5A; the longest time from detecting the power-off signal to disconnecting all relays is no more than 5 seconds; S13: When a serious fault that requires disconnecting the relay is detected, the BMS needs to first request that all power is 0, send a power-off command with a charge and discharge prohibition mark to the PCS, and disconnect all relays after the loop current is ≤5A. The longest time from detecting the power-off signal to disconnecting all relays is no more than 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 negative relays will be disconnected immediately; S23, 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; 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-down at low temperature. It is necessary to judge in the charging state. When the 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 can be disconnected simultaneously or successively.

5. A rapid response system for energy storage battery failure, characterized in that: It includes an energy storage battery, a total positive relay, a total negative relay, a BMS, a VCU, a PCS and an EMS, wherein 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; When the power is always 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 power is 0, send a power-off instruction with a charge and discharge prohibition mark to the PCS, and disconnect all relays after the loop current is ≤5A. The longest time from detecting the power-off signal to disconnecting all relays is no more than 5 seconds. When a serious fault that requires disconnecting the relay is detected, the BMS needs to first request that all power is 0, send a power-off command with a charge and discharge prohibition flag to the PCS, and disconnect all relays after the loop current is ≤5A. The longest time from detecting the power-off signal to disconnecting all relays is no more than 5 seconds. High voltage power-down is performed during an undervoltage fault when: If the current is detected to be ≤-2A and lasts for 10S, the total positive and negative relays will be disconnected immediately; If the current is detected to be ≤-10A and lasts for 3S, the total positive and 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 delay of up to 5 minutes; When the current is detected to be ≥2A, the total positive and 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 temperature. It is necessary to judge during charging. When a low temperature level 1 fault is triggered, the 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 1, characterized in that: The undervoltage fault includes a single-cell low voltage fault or a total low voltage fault.

7. The energy storage battery failure rapid response system according to claim 1, characterized in that: When high voltage power is cut 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 1, 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 fault rapid response method as described in any one of claims 1-4.

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 as described in any one of claims 1 to 4.

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