Energy storage system, consumption reduction control method, controller and power supply system

Abstract

The embodiment of the present application relates to an energy storage system, a consumption reduction control method, a controller and a power supply system. The energy storage system includes a battery module, a DC auxiliary power supply, an AC auxiliary power supply, a detection unit, a first controller and a second controller. The first controller determines a target consumption reduction mode according to fault information. The first controller operates in the target consumption reduction mode and sends a shutdown instruction to the second controller, so that the second controller controls the AC auxiliary power supply to turn on according to the shutdown instruction and sends a first shutdown signal to the DC auxiliary power supply. The first controller also sends a second shutdown signal to the DC auxiliary power supply, so that the DC auxiliary power supply enters a shutdown state in response to the common input of the first shutdown signal and the second shutdown signal. Therefore, when a system failure occurs, the first controller and the second controller in the energy storage system jointly control the DC auxiliary power supply to turn off, so that the battery module cannot continue to supply power to the load, thereby reducing the power consumption of the battery module.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of battery power reduction control, and in particular to an energy storage system, a power reduction control method, a controller, and a power supply system. Background Art

[0002] Dual auxiliary sources refer to the DC auxiliary power supply powered by the battery module and the AC auxiliary power supply powered by the power grid. In the dual auxiliary source energy storage system, when the energy storage system is operating normally, the DC auxiliary power supply is used first to supply power to the load. Even if an unrecoverable fault is detected and the system is in standby mode, power is still drawn from the battery module, and then the DC auxiliary power supply supplies power to the load. However, due to the existence of the fault, the battery module cannot be charged, and the battery module is continuously in a standby self-consumption state, which leads to high power consumption of the battery module, serious power loss, irreversible damage to the battery module, and battery life is affected. Summary of the invention

[0003] The embodiments of the present application provide an energy storage system, a consumption reduction control method, a controller and a power supply system, which can reduce the power consumption of a battery module in a system failure state, thereby extending the life of the battery module.

[0004] In a first aspect, an embodiment of the present application provides an energy storage system, including: a battery module, a DC auxiliary power supply, an AC auxiliary power supply, a detection unit, a first controller, and a second controller;

[0005] The DC auxiliary power supply is electrically connected to the battery module and the load respectively, and the DC auxiliary power supply is used to convert the first DC voltage of the battery module into a second DC voltage to supply power to the load;

[0006] The AC auxiliary power supply is electrically connected to the power grid and the load respectively, and the AC auxiliary power supply is used to convert the first AC voltage of the power grid into the second DC voltage to supply power to the load;

[0007] The detection unit is electrically connected to the battery module, the first controller and the second controller respectively, and the detection unit is used to detect faults of the battery module, the first controller and the second controller and generate fault information;

[0008] The first controller is also electrically connected to the DC auxiliary power supply, and the second controller is also electrically connected to the DC auxiliary power supply and the AC auxiliary power supply respectively;

[0009] The first controller is used for:

[0010] Obtaining the fault information;

[0011] Determining a target power consumption reduction mode according to the fault information;

[0012] operating in the target energy-saving mode;

[0013] sending a shutdown instruction to the second controller, so that the second controller controls the AC auxiliary power supply to turn on and sends a first shutdown signal to the DC auxiliary power supply according to the shutdown instruction;

[0014] A second shutdown signal is sent to the DC auxiliary power supply, so that the DC auxiliary power supply enters a shutdown state in response to the common input of the first shutdown signal and the second shutdown signal.

[0015] In some embodiments, the first controller is specifically configured to:

[0016] determining a fault type according to the fault information;

[0017] If the fault type is an undervoltage fault of the battery module, determining the first power reduction mode as the target power reduction mode;

[0018] If the fault type is the first controller fault or the second controller fault, the second power reduction mode is determined to be the target power reduction mode.

[0019] In some embodiments, before determining the first power reduction mode as the target power reduction mode, the first controller is further configured to:

[0020] Obtaining a first abnormal duration, where the first abnormal duration is a duration during which the fault type remains the battery module undervoltage fault;

[0021] If the first abnormal time reaches a first preset time, the first power reduction mode is determined to be the target power reduction mode.

[0022] In some embodiments, before determining the second power reduction mode as the target power reduction mode, the first controller is further configured to:

[0023] Acquire a second abnormal duration, where the second abnormal duration is a duration during which the fault type remains the first controller fault or the second controller fault;

[0024] If the second abnormal time reaches a second preset time, the second power reduction mode is determined to be the target power reduction mode.

[0025] In some embodiments, if the target power reduction mode is the first power reduction mode, the first controller is further configured to:

[0026] Acquire a first operating duration, where the first operating duration is a duration during which the first controller operates in the first power reduction mode;

[0027] When the first operation time reaches a third preset time, the first power saving mode is exited.

[0028] In some embodiments, if the target power reduction mode is the second power reduction mode, the first controller is further configured to:

[0029] The operation data is saved every fourth preset time period.

[0030] In some embodiments, the second controller is specifically configured to:

[0031] If the first controller communicates normally with the second controller, the shutdown instruction is obtained, the AC auxiliary power supply is controlled to be turned on, and a first shutdown signal is sent to the DC auxiliary power supply;

[0032] If the communication between the first controller and the second controller is abnormal, the third abnormal duration is confirmed, wherein the third abnormal duration is the duration of the communication abnormality. When the third abnormal duration reaches the fifth preset duration, the AC auxiliary power supply is controlled to turn on and a first shutdown signal is sent to the DC auxiliary power supply.

[0033] In a second aspect, an embodiment of the present application provides a method for controlling consumption reduction of an energy storage system, which is applied to the energy storage system as described above, and the method includes:

[0034] Obtaining the fault information;

[0035] Determining a target power consumption reduction mode according to the fault information;

[0036] operating in the target energy-saving mode;

[0037] sending a shutdown instruction to the second controller, so that the second controller controls the AC auxiliary power supply to turn on and sends a first shutdown signal to the DC auxiliary power supply according to the shutdown instruction;

[0038] A second shutdown signal is sent to the DC auxiliary power supply, so that the DC auxiliary power supply enters a shutdown state in response to the common input of the first shutdown signal and the second shutdown signal.

[0039] In some embodiments, determining a target power consumption reduction mode according to the fault information includes:

[0040] determining a fault type according to the fault information;

[0041] If the fault type is an undervoltage fault of the battery module, determining the first power reduction mode as the target power reduction mode;

[0042] If the fault type is the first controller fault or the second controller fault, the second power reduction mode is determined to be the target power reduction mode.

[0043] In some embodiments, before determining the first power reduction mode as the target power reduction mode, the method further includes:

[0044] Obtaining a first abnormal duration, where the first abnormal duration is a duration during which the fault type remains the battery module undervoltage fault;

[0045] If the first abnormal time reaches a first preset time, the first power reduction mode is determined to be the target power reduction mode.

[0046] In some embodiments, before determining the second power reduction mode as the target power reduction mode, the method further includes:

[0047] Acquire a second abnormal duration, where the second abnormal duration is a duration during which the fault type remains the first controller fault or the second controller fault;

[0048] If the second abnormal time reaches a second preset time, the second power reduction mode is determined to be the target power reduction mode.

[0049] In some embodiments, if the target power reduction mode is the first power reduction mode, the method further includes:

[0050] Acquire a first operating duration, where the first operating duration is a duration during which the first controller operates in the first power reduction mode;

[0051] When the first operation time reaches a third preset time, the first power saving mode is exited.

[0052] In some embodiments, if the target power reduction mode is the second power reduction mode, the method further includes:

[0053] The operation data is saved every fourth preset time period.

[0054] In the third aspect, an embodiment of the present application provides a controller comprising a memory and a processor, wherein the memory is connected to the processor, and the processor is used to execute one or more computer programs stored in the memory. When the processor executes the one or more computer programs, the controller implements the power consumption reduction control method as described above.

[0055] In a fourth aspect, an embodiment of the present application provides a power supply system, including:

[0056] load;

[0057] and an energy storage system as described above.

[0058] Compared with the prior art, the energy storage system of the embodiment of the present application includes a battery module, a DC auxiliary power supply, an AC auxiliary power supply, a detection unit, a first controller and a second controller. The detection unit detects the faults of the battery module, the first controller and the second controller, generates fault information, the first controller obtains the fault information, and determines the target power reduction mode according to the fault information. The first controller operates in the target power reduction mode and sends a shutdown instruction to the second controller, so that the second controller controls the AC auxiliary power supply to start according to the shutdown instruction and sends a first shutdown signal to the DC auxiliary power supply. The first controller also sends a second shutdown signal to the DC auxiliary power supply, so that the DC auxiliary power supply enters a shutdown state in response to the common input of the first shutdown signal and the second shutdown signal. The fault information indicates that the system has a fault. Therefore, when the system fails, the first controller in the energy storage system operates in the target power reduction mode and sends a shutdown instruction to the second controller, so that the second controller controls the AC auxiliary power supply to start, and the grid end supplies power to the load. At the same time, the first controller and the second controller jointly control the DC auxiliary power supply to shut down, so that the battery module cannot continue to supply power to the load, reduce the power consumption of the battery module, and prevent the battery module from being depleted, thereby extending the life of the battery module and protecting the battery module. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] One or more embodiments are exemplarily described by the figures in the corresponding drawings, and these exemplary descriptions are not intended to limit the embodiments. Elements with the same reference numerals in the drawings represent similar elements.

[0060] Figure 1 It is a structural schematic diagram of one of the power supply systems provided in the embodiments of the present application;

[0061] Figure 2 is a structural schematic diagram of one of the energy storage systems provided in the embodiments of the present application;

[0062] Figure 3 This is a schematic diagram of a flow chart of a consumption reduction control method provided in an embodiment of the present application;

[0063] Figure 4 yes Figure 3 Schematic diagram of the process of step S102;

[0064] Figure 5 is a structural schematic diagram of one of the consumption reduction control devices provided in the embodiments of the present application;

[0065] Figure 6 This is a schematic diagram of the hardware structure of a controller provided in an embodiment of the present application. DETAILED DESCRIPTION

[0066] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and in detail in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0067] In the present application, when an element is expressed as being “connected to” another element, it may be directly connected to the other element, or one or more intervening elements may be present therebetween.

[0068] In addition, the technical features involved in the various embodiments of the present application described below can be combined with each other as long as there is no structural conflict between them.

[0069] The energy storage system of the present application can be applied to a variety of charging and discharging scenarios, such as industrial and commercial, power stations, household, charging stations, etc. The energy storage system of the present application is a grid-connected energy storage system, which is connected to the power grid. The energy storage system can release and supply the stored energy to the power grid during the peak period of power demand to achieve peak load regulation and energy balance.

[0070] See also Figure 1 , Figure 1 is a schematic diagram of a power supply system provided in an embodiment of the present application, such as Figure 1 As shown, the power supply system includes a load and an energy storage system.

[0071] The power grid is an external AC power grid, and the load is power-consuming equipment that uses electricity as energy, including: electric vehicles, such as electric cars, electric two-wheelers, electric tricycles, etc., power tools, etc., and various household appliances, such as refrigerators, washing machines, etc. Figure 1 The load is a refrigerator as an example.

[0072] like Figure 2 As shown, the energy storage system 100 of the embodiment of the present application includes a battery module 10, a DC auxiliary power supply 20, an AC auxiliary power supply 30, a first controller 40 and a second controller 50, wherein the DC auxiliary power supply 20 and the AC auxiliary power supply 30 together constitute Figure 1 The inverter circuit in.

[0073] The battery module 10 includes a plurality of cells connected in parallel, in series or in hybrid connection for storing and providing electric energy, wherein the hybrid connection includes series connection and parallel connection. The first end of the DC auxiliary power supply 20 is connected to the battery module 10, and the second end of the DC auxiliary power supply 20 is connected to the load. The first end of the AC auxiliary power supply 30 is connected to the power grid, and the second end of the AC auxiliary power supply 30 is connected to the load. In some embodiments, the second end of the AC auxiliary power supply 30 is also connected to the second end of the DC auxiliary power supply 20, and the figure shows an example in which the second end of the AC auxiliary power supply 30 is only connected to the load.

[0074] The DC auxiliary power supply 20 is a power supply that converts direct current from one voltage level to another voltage level and keeps the output voltage constant, which is generally implemented by a DC / DC converter. The AC auxiliary power supply 30 is a power supply that converts alternating current into direct current and keeps the output voltage constant, which is generally implemented by an AC / DC converter.

[0075] See also Figure 1 and Figure 2 The energy storage system 100 may include a plurality of battery modules 10, which may be connected in parallel, and the output ends of the plurality of battery modules 10 are all connected to a power bus, which is then connected to a first end of a DC auxiliary power supply 20. When the battery module 10 is discharging, the second end of the DC auxiliary power supply 20 is its output end, and when the battery module 10 is charging, the first end of the DC auxiliary power supply 20 is its output end.

[0076] Specifically, the battery module 10 provides a first DC voltage to the DC auxiliary power supply 20, and the DC auxiliary power supply 20 converts the first DC voltage into a second DC voltage and loads the second DC voltage to the load through its second end to power the load, thereby realizing discharge of the battery module 10.

[0077] When the battery module 10 is charged (at this time, the second end of the AC auxiliary power supply 30 is also connected to the second end of the DC auxiliary power supply 20), the AC auxiliary power supply 30 converts the first AC voltage provided by the power grid into a second DC voltage, and the second DC voltage supplies power to the load. The second DC voltage acts on the battery module 10 through the first end of the DC auxiliary power supply 20, and the battery module 10 stores energy, thereby charging the battery module 10.

[0078] The first control terminal of the DC auxiliary power supply 20 is connected to the first controller 40, and the second control terminal of the DC auxiliary power supply 20 and the control terminal of the AC auxiliary power supply 30 are respectively connected to the second controller 50. The second controller 50 can send a corresponding control signal to the AC auxiliary power supply 30 to control its working state, and the first controller 40 and the second controller 50 can jointly control the working state of the DC auxiliary power supply 20 by sending a corresponding control signal to the DC auxiliary power supply 20. For example: the second controller 50 sends a first shutdown signal to the DC auxiliary power supply 20, and the first controller 40 sends a second shutdown signal to the DC auxiliary power supply 20. The DC auxiliary power supply 20 enters the shutdown state in response to the common input of the first shutdown signal and the second shutdown signal. The second controller 50 can also send a start signal to the AC auxiliary power supply 30 to control the AC auxiliary power supply 30 to start.

[0079] When the DC auxiliary power supply 20 is turned on, the battery module 10 is preferred to supply power to the load. When the DC auxiliary power supply 20 is turned off, the battery module 10 cannot continue to discharge. When the AC auxiliary power supply 30 is turned on, the grid end supplies power to the load through the AC auxiliary power supply 30, or charges the battery module 10.

[0080] The first controller 40 is a battery management system (BMS), wherein the battery module 10 and the BMS together constitute Figure 1 For the battery pack in the battery module 10, the BMS can manage the charging and / or discharging of the battery module 10, and can also be used to monitor, manage and protect the performance and safety of the battery module 10. The second controller 50 can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA), a single-chip microcomputer, an ARM (Acorn RISC Machine) or other programmable logic device, discrete gate or transistor logic, discrete hardware components or any combination of these components.

[0081] The energy storage system is a dual auxiliary source system. In the presence of the AC auxiliary power supply 30, the system has the characteristic that it cannot be powered off and shut down. When the energy storage system is operating normally, the DC auxiliary power supply 20 is used first to supply power to the load. Even if an unrecoverable fault is detected and the system is in standby mode, power is still drawn from the battery module 10, and then the DC auxiliary power supply 20 supplies power to the load. However, due to the presence of the fault, the battery module 10 cannot be charged, and the battery module 10 is continuously in a standby self-consumption state, which leads to a serious power loss of the battery module 10, causing irreversible damage and affecting the battery life.

[0082] Based on the above reasons, an embodiment of the present application provides an energy storage system, which, when a system failure occurs, controls the AC auxiliary power supply to turn on so that the AC auxiliary power supply supplies power to the load, and controls the DC auxiliary power supply to turn off so that the battery module cannot supply power to the load, thereby reducing the power consumption of the battery module and extending the life of the battery module.

[0083] For details, please continue to see Figure 2 The energy storage system 100 also includes a detection unit 60, wherein the detection unit 60 is electrically connected to the battery module 10, the first controller 40 and the second controller 50 respectively, and the detection unit 60 is used to detect faults of the battery module 10, the first controller 40 and the second controller 50 and generate fault information.

[0084] Specifically, the battery module 10 may have many types of faults during the discharge process, such as undervoltage fault, overcurrent fault, etc. The first controller 40 or the second controller 50 may also have many types of faults during the operation process, such as communication fault, control fault, etc. The fault information generated by the detection unit 60 can characterize the type of fault.

[0085] When a fault occurs in the battery module 10 or the first controller 40 or the second controller 50 , that is, some irrecoverable faults occur in the energy storage system, if the battery module 10 is still used to supply power to the load, the battery module 10 will be depleted.

[0086] Therefore, in the embodiment of the present application, the first controller 40 receives the fault information, determines the target power reduction mode according to the fault information, and operates in the target power reduction mode. The second controller 50 controls the AC auxiliary power supply 30 to turn on, and the first controller 40 and the second controller 50 jointly control the DC auxiliary power supply to turn off.

[0087] Specifically, when the first controller 40 operates in the target power consumption reduction mode, the first controller 40 sends a shutdown instruction to the second controller 50. The second controller 50 receives the shutdown instruction, and in response to the shutdown instruction, the second controller 50 sends a start signal to the AC auxiliary power supply 30 to control the AC auxiliary power supply 30 to turn on, so that the grid end supplies power to the load through the AC auxiliary power supply 30.

[0088] At the same time, the second controller 50 responds to the shutdown instruction and also sends a first shutdown signal to the DC auxiliary power supply 20, and the first controller 40 sends a second shutdown signal to the DC auxiliary power supply 20, so that the DC auxiliary power supply 20 responds to the common input of the first shutdown signal and the second shutdown signal and enters the shutdown state, thereby making the battery module 10 unable to continue to supply power to the load, preventing it from running out of power.

[0089] Therefore, the second controller 50 controls the AC auxiliary power supply 30 to turn on, so that the grid end supplies power to the load, and the first controller 40 and the second controller 50 jointly control the DC auxiliary power supply 20 to turn off, so that the battery module 10 can no longer supply power to the load, thereby reducing the power consumption of the battery module 10 and preventing the battery module 10 from running out of power, thereby extending the life of the battery module 10 and protecting the battery module 10.

[0090] In some embodiments, different fault information represents different faults, and the first controller 40 selects different power-saving modes to operate under different faults. Specifically, the first controller 40 receives the fault information, analyzes the fault information, and determines the fault type according to the fault information. If the fault type is an undervoltage fault of the battery module 10, the first power-saving mode is determined to be the target power-saving mode. If the fault type is a fault of the first controller 40 or a fault of the second controller 50, the second power-saving mode is determined to be the target power-saving mode.

[0091] In some embodiments, in order to prevent false triggering and make the first controller 40 enter different power reduction modes, before the first controller 40 determines the target power reduction mode, the first controller 40 can also improve the accuracy of fault state detection according to the duration of each fault.

[0092] Specifically, the first controller 40 obtains a first abnormal duration, wherein the first abnormal duration is the duration during which the fault type remains an undervoltage fault of the battery module 10. If the first abnormal duration reaches a first preset duration, the first consumption reduction mode is determined to be the target consumption reduction mode.

[0093] That is, when the first controller 40 receives fault information, and the fault information indicates that the fault type is an undervoltage fault of the battery module 10, the fault information is continuously received and the first abnormal duration is recorded. If the fault information indicates that the fault type continues to be an undervoltage fault of the battery module 10, and the first abnormal duration reaches the first preset duration, it indicates that an undervoltage fault of the battery module 10 has indeed occurred, and the duration of the undervoltage fault of the battery module 10 has reached the first preset duration, the first controller 40 then determines the first consumption reduction mode as the target consumption reduction mode, and operates in the first consumption reduction mode.

[0094] Similarly, when the first controller 40 receives fault information and the fault information indicates that the fault type is a first controller 40 fault or a second controller 50 fault, the first controller 40 continues to receive the fault information and records the second abnormal duration, wherein the second abnormal duration is the duration during which the fault type remains a first controller 40 fault or a second controller 50 fault. If the second abnormal duration reaches the second preset duration, the second consumption reduction mode is determined to be the target consumption reduction mode.

[0095] If the second abnormal duration of the first controller 40 failure or the second controller 50 failure reaches the second preset duration, it indicates that the first controller 40 failure or the second controller 50 failure has indeed occurred, and the duration of the first controller 40 failure or the second controller 50 failure reaches the second preset duration, the first controller 40 then determines the second power reduction mode as the target power reduction mode, and operates in the second power reduction mode.

[0096] Among them, the first preset time length and the second preset time length can be set as needed. In the embodiment of the present application, the first preset time length is 1 minute, and the second preset time length is 5 minutes.

[0097] In the embodiment of the present application, through multiple detections, the corresponding power consumption reduction mode will be selected as the target power consumption reduction mode only when the first abnormal duration or the second abnormal duration reaches the corresponding preset duration, so as to prevent false detection and reduce detection errors.

[0098] The first power reduction mode and the second power reduction mode are different power reduction modes, and the operating states of the first controller 40 are different. For example: in the first power reduction mode, the first controller 40 will control the charging and discharging MOS to shut down, and will also send a second shutdown signal to the DC auxiliary power supply 20, and send a shutdown instruction to the second controller 50, so that the second controller 50 controls the AC auxiliary power supply 30 to turn on and sends the first shutdown signal to the DC auxiliary power supply 20 according to the shutdown instruction. In addition, in the first power reduction mode, after running for a period of time, the first controller 40 can periodically and actively exit the power reduction mode to detect whether there are conditions to enter the charging state. When there is electricity on the grid end, it is considered that there are conditions to enter the charging state, and the battery module 10 enters the charging state.

[0099] That is, if the target power reduction mode is the first power reduction mode, when the first controller 40 is running in the first power reduction mode, the first operation duration is obtained, and the first operation duration is the duration of the first controller 40 running in the first power reduction mode. When the first operation duration reaches the third preset duration, the first power reduction mode is exited. After exiting the first power reduction mode, it is detected whether there are conditions to enter the charging state.

[0100] When the first controller 40 fails or the second controller 50 fails, the first controller 40 will choose to operate in the second power-reduction mode. During the period when the AC auxiliary power supply 30 supplies power to the load, the failure of the first controller 40 or the second controller 50 may cause a sudden disconnection from the network, thereby causing the system to suddenly lose power without saving key data. Therefore, in the second power-reduction mode, in addition to controlling the charge and discharge MOS to turn off, sending a second shutdown signal to the DC auxiliary power supply 20, and sending a shutdown instruction to the second controller 50, so that the second controller 50 controls the AC auxiliary power supply 30 to turn on and sends the first shutdown signal to the DC auxiliary power supply 20 according to the shutdown instruction, the first controller 40 will also perform operations such as sleeping the sampling chip, shutting down the communication function, and saving the operating data every fourth preset time, where the fourth preset time can be set as needed. In the embodiment of the present application, the fourth preset time is 5 minutes.

[0101] The first controller 40 operates in the first power reduction mode or the second power reduction mode and enters a power reduction state, but it is not sleep or shut down, and the system still runs necessary programs. When the first controller 40 operates in the first power reduction mode or the second power reduction mode, the external switch can make the first controller 40 exit the currently running power reduction mode. For example: if the first controller 40 is currently operating in the first power reduction mode or the second power reduction mode, then during operation, if an exit command is received from an external switch, such as a dry node, a communication command, or a key command, the first controller 40 exits the current power reduction mode and re-performs a fault diagnosis self-test to prevent the abnormal state from being caused by an erroneous trigger, causing the system to remain in a standby state, and to avoid the need to confirm whether the abnormal state still exists by shutting down the AC auxiliary power supply 30, restarting the machine, and other complex operations.

[0102] The first controller 40 is a BMS which is a communication board and can control only the DC auxiliary power supply 20 . The second controller 50 is a control unit which is a control board and can control the DC auxiliary power supply 20 as well as the AC auxiliary power supply 30 .

[0103] The first controller 40 is in communication connection with the second controller 50, and the first controller 40 and the second controller 50 send interactive commands to each other to maintain communication, such as handshake commands, etc. If the command interaction is interrupted for a period of time, such as the second controller 50 does not receive the command sent by the first controller 40 for more than 1 minute, it is determined that the communication between the first controller 40 and the second controller 50 is abnormal.

[0104] The first controller 40 sends a second shutdown signal to the DC auxiliary power supply 20, and the second controller 50 sends a first shutdown signal to the DC auxiliary power supply 20, the DC auxiliary power supply 20 will be completely shut down and enter the shutdown state. If one of the controllers does not send a shutdown signal to the DC auxiliary power supply 20, the DC auxiliary power supply 20 will not be completely shut down.

[0105] When the first controller 40 and the second controller 50 communicate normally, the shutdown instruction can be sent and received normally, and the second controller 50 can receive the shutdown instruction normally to control the AC auxiliary power supply 30 to turn on and send a first shutdown signal to the DC auxiliary power supply 20.

[0106] If the communication between the first controller 40 and the second controller 50 is abnormal, the second controller 50 continuously detects the duration of the communication abnormality and confirms the third abnormal duration, wherein the third abnormal duration is the duration of the communication abnormality. When the third abnormal duration reaches the fifth preset duration, the AC auxiliary power supply 30 is controlled to turn on and a first shutdown signal is sent to the DC auxiliary power supply 20.

[0107] Among them, the fifth preset time length can be set as needed. In the embodiment of the present application, the fifth preset time length is 1 minute.

[0108] In summary, the working process of the energy storage system can be described as follows:

[0109] First, the power grid is connected, the AC auxiliary power supply 30 is connected, and after the energy storage system operates normally, the battery module 10 supplies power to the load via the DC auxiliary power supply 20 .

[0110] The detection unit 60 detects whether the battery module 10 is under-voltage, detects whether the first controller 40 or the second controller 50 fails, generates corresponding fault information, and sends the fault information to the first controller 40, which receives and processes it.

[0111] The first controller 40 determines whether the voltage of the battery module 10 is undervoltage based on the fault information, and determines whether the first controller 40 fails or the second controller 50 fails. If the battery module 10 is undervoltage, the first abnormal duration of the undervoltage of the battery module 10 is obtained, and when the first abnormal duration reaches T1, the first consumption reduction mode is determined to be the target consumption reduction mode. If the first controller 40 fails or the second controller 50 fails, the second abnormal duration of the failure is obtained, and when the second abnormal duration reaches T2, the second consumption reduction mode is determined to be the target consumption reduction mode.

[0112] The first controller 40 operates in the target power reduction mode and is in the power reduction working state. In the power reduction working state, the first controller 40 determines whether an exit instruction sent by an external switch is received. If an exit instruction is received, the first controller 40 exits the target power reduction mode.

[0113] Furthermore, if the first controller 40 operates in the first power reduction mode as the target power reduction mode, after the first operation time reaches T time, the first controller 40 actively and periodically exits the first power reduction mode.

[0114] When the first controller 40 is in the target power reduction mode, the first controller 40 sends a second shutdown signal to the DC auxiliary power supply 20, and the first controller 40 sends a shutdown instruction to the second controller 50. The second controller 50 controls the AC auxiliary power supply 30 to turn on according to the shutdown instruction, so that the grid end supplies power to the load, and sends a first shutdown signal to the DC auxiliary power supply 20. The DC auxiliary power supply 20 enters the shutdown state due to the common input of the first shutdown signal and the second shutdown signal.

[0115] The power consumption of the battery module 10 in the standby mode can reach 4.2 W. If the first controller 40 operates in the first power reduction mode, the power consumption of the battery module 10 is 1 W. If the first controller 40 operates in the second power reduction mode, the power consumption of the battery module 10 is 0.006 W. Therefore, when a system failure occurs, the embodiment of the present application controls the DC auxiliary power supply 20 to be turned off so that the battery module 10 no longer supplies power to the load, thereby reducing the power consumption of the battery module 10.

[0116] To summarize, when a system failure occurs, the first controller in the energy storage system operates in a target consumption reduction mode, and the second controller controls the AC auxiliary power supply to turn on, so that the grid supplies power to the load. At the same time, the first controller and the second controller jointly control the DC auxiliary power supply to turn off, so that the battery module can no longer supply power to the load, thereby reducing the power consumption of the battery module and preventing the battery module from running low on power, thereby extending the life of the battery module and protecting the battery module.

[0117] See also Figure 3 , Figure 3 A consumption reduction control method provided in an embodiment of the present application is applied to an energy storage system in any of the above embodiments, wherein the energy storage system includes a battery module, a DC auxiliary power supply, an AC auxiliary power supply, a detection unit, a first controller and a second controller. The specific structure and specific connection relationship of the energy storage system are as follows: Figure 2 As shown, the consumption reduction control method S100 includes:

[0118] S101: Acquire the fault information;

[0119] S102: Determine a target power consumption reduction mode according to the fault information;

[0120] In some embodiments, Figure 4 As shown, step S102 includes:

[0121] S1021: Determine the fault type according to the fault information;

[0122] S1022: If the fault type is an undervoltage fault of the battery module, determining the first power reduction mode as the target power reduction mode;

[0123] S1023: If the fault type is the first controller fault or the second controller fault, determining the second power reduction mode as the target power reduction mode.

[0124] In the embodiment of the present application, different fault information represents different fault types, and the first controller can select different power reduction modes according to the fault type.

[0125] In some embodiments, before determining the first power reduction mode as the target power reduction mode, the method further includes:

[0126] Obtaining a first abnormal duration, where the first abnormal duration is a duration during which the fault type remains the battery module undervoltage fault;

[0127] If the first abnormal time reaches a first preset time, the first power reduction mode is determined to be the target power reduction mode.

[0128] In some embodiments, before determining the second power reduction mode as the target power reduction mode, the method further includes:

[0129] Acquire a second abnormal duration, where the second abnormal duration is a duration during which the fault type remains the first controller fault or the second controller fault;

[0130] If the second abnormal time reaches a second preset time, the second power reduction mode is determined to be the target power reduction mode.

[0131] The embodiment of the present application determines the first abnormal duration or the second abnormal duration of the fault through multiple detections, which can prevent false detection and reduce detection errors.

[0132] S103: operating in the target energy-saving mode;

[0133] S104: Sending a shutdown instruction to the second controller, so that the second controller controls the AC auxiliary power supply to turn on according to the shutdown instruction and sends a first shutdown signal to the DC auxiliary power supply;

[0134] S105: Sending a second shutdown signal to the DC auxiliary power supply, so that the DC auxiliary power supply enters a shutdown state in response to the common input of the first shutdown signal and the second shutdown signal.

[0135] In some embodiments, if the target power reduction mode is the first power reduction mode, the method further includes:

[0136] Acquire a first operating duration, where the first operating duration is a duration during which the first controller operates in the first power reduction mode;

[0137] When the first operation time reaches a third preset time, the first power saving mode is exited.

[0138] If the first controller operates in the first power reduction mode, it can actively and periodically exit the first power reduction mode and re-enter the detection phase to determine whether there are conditions to enter the charging state.

[0139] In some embodiments, if the target power reduction mode is the second power reduction mode, the method further includes:

[0140] The operation data is saved every fourth preset time period.

[0141] If the first controller fails or the second controller fails, the second power-saving mode is selected to run, and the operating data is saved at regular intervals to prevent sudden disconnection from the network and power failure, which may result in failure to save the operating data in time.

[0142] To summarize, when a system failure occurs, the method enables the first controller to operate in a target power reduction mode and sends a shutdown command to the second controller, so that the second controller controls the AC auxiliary power supply to turn on, and the grid supplies power to the load. At the same time, the first controller and the second controller jointly control the DC auxiliary power supply to turn off, so that the battery module can no longer supply power to the load, thereby reducing the power consumption of the battery module and preventing the battery module from running low on power, thereby extending the life of the battery module and protecting the battery module.

[0143] It should be noted that, in each of the above-mentioned embodiments, there is not necessarily a certain order between the above-mentioned steps. A person skilled in the art can understand, based on the description of the embodiments of the present application, that in different embodiments, the above-mentioned steps may have different execution orders, that is, they may be executed in parallel, may be executed interchangeably, and so on.

[0144] As another aspect of the embodiment of the present application, the embodiment of the present application provides a consumption reduction control device, which is applied to the above energy storage system. The consumption reduction control device can be a software module, and the software module includes a number of instructions, which are stored in a memory. The processor can access the memory and call the instructions for execution to complete the consumption reduction control method described in each of the above embodiments.

[0145] In some embodiments, the consumption reduction control device can also be constructed by hardware devices. For example, the consumption reduction control device can be constructed by one or more chips, and each chip can work in coordination with each other to complete the consumption reduction control method described in each of the above embodiments. For another example, the consumption reduction control device can also be constructed by various logic devices, such as a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA), a single-chip microcomputer, an ARM (Acorn RISC Machine) or other programmable logic devices, discrete gates or transistor logic, discrete hardware components, or any combination of these components.

[0146] See also Figure 5 , Figure 5 is a schematic diagram of a power consumption reduction control device provided in an embodiment of the present application, such as Figure 5 As shown, the power consumption reduction control device 200 includes an acquisition module 201 , a determination module 202 , an operation module 203 , a control module 204 and a sending module 205 .

[0147] The acquisition module 201 is used to acquire the fault information. The determination module 202 is used to determine the target power reduction mode according to the fault information. The operation module 203 is used to operate in the target power reduction mode. The control module 204 is used to send a shutdown instruction to the second controller, so that the second controller controls the AC auxiliary power supply to turn on and sends a first shutdown signal to the DC auxiliary power supply according to the shutdown instruction. The sending module 205 is used to send a second shutdown signal to the DC auxiliary power supply, so that the DC auxiliary power supply enters a shutdown state in response to the common input of the first shutdown signal and the second shutdown signal.

[0148] It should be noted that, since the consumption reduction control device and the consumption reduction control method in the above embodiment are based on the same inventive concept, the corresponding contents in the above method embodiment are also applicable to the device embodiment and will not be described in detail here.

[0149] See also Figure 6 , Figure 6 Schematic diagram of a controller provided by an embodiment of the present invention. Figure 6As shown, the controller 300 includes one or more processors 301 and a memory 302. Figure 6 A processor 301 is taken as an example.

[0150] The processor 301 and the memory 302 may be connected via a bus or other means. Figure 6 The example of connecting through bus is taken in the following.

[0151] The memory 302 is a non-volatile computer-readable storage medium that can be used to store non-volatile software programs, non-volatile computer executable programs and modules, such as program instructions / modules corresponding to the controller in the embodiment of the present invention. The processor 301 executes various functional applications and data processing of the power consumption control device by running the non-volatile software programs, instructions and modules stored in the memory 302, that is, realizes the power consumption control method provided by the above method embodiment and the functions of each module or unit of the above device embodiment.

[0152] The memory 302 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage devices. In some embodiments, the memory 302 may optionally include a memory remotely arranged relative to the processor 301, and these remote memories may be connected to the processor 301 via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0153] The program instructions / modules are stored in the memory 302 , and when executed by the one or more processors 301 , the power consumption reduction control method in any of the above method embodiments is executed.

[0154] An embodiment of the present invention further provides a non-transitory computer-readable storage medium, wherein the non-transitory computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are executed by one or more processors, such as Figure 6 A processor 301 in the embodiment may enable the one or more processors to execute the power consumption reduction control method in any of the above method embodiments.

[0155] An embodiment of the present invention further provides a non-volatile computer storage medium, wherein the computer storage medium stores computer executable instructions, and the computer executable instructions are executed by one or more processors, such as Figure 6 A processor 301 in the embodiment may enable the one or more processors to execute the power consumption reduction control method in any of the above method embodiments.

[0156] An embodiment of the present invention further provides a computer program product, which includes a computer program stored on a non-volatile computer-readable storage medium, and the computer program includes program instructions. When the program instructions are executed by a controller, the controller executes any one of the power consumption reduction control methods.

[0157] Through the description of the above implementation methods, a person of ordinary skill in the art can clearly understand that each implementation method can be implemented by means of software plus a general hardware platform, and of course, can also be implemented by hardware. A person of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment method can be completed by instructing the relevant hardware through a computer program in a computer program product, and the computer program can be stored in a non-transitory computer-readable storage medium, and the computer program includes program instructions. When the program instructions are executed by a drone, the drone can execute the processes of the embodiments of the above-mentioned methods. Among them, the storage medium can be a disk, an optical disk, a read-only memory (ROM) or a random access memory (RAM), etc.

[0158] The above descriptions are merely embodiments of the present application and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

[0159] The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them. Under the idea of ​​the present application, the technical features in the above embodiments or different embodiments can also be combined, and the steps can be implemented in any order. It should be understood by ordinary technicians in this field that they can still modify the technical solutions recorded in the above embodiments, or replace some of the technical features by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An energy storage system, characterized in that: include: A battery module, a DC auxiliary power supply, an AC auxiliary power supply, a detection unit, a first controller and a second controller; The DC auxiliary power supply is electrically connected to the battery module and the load respectively, and the DC auxiliary power supply is used to convert the first DC voltage of the battery module into a second DC voltage to supply power to the load; The AC auxiliary power supply is electrically connected to the power grid and the load respectively, and the AC auxiliary power supply is used to convert the first AC voltage of the power grid into the second DC voltage to supply power to the load; The detection unit is electrically connected to the battery module, the first controller and the second controller respectively, and the detection unit is used to detect faults of the battery module, the first controller and the second controller and generate fault information; The first controller is also electrically connected to the DC auxiliary power supply, and the second controller is also electrically connected to the DC auxiliary power supply and the AC auxiliary power supply respectively; The first controller is used for: Obtaining the fault information; Determining a target power consumption reduction mode according to the fault information; operating in the target energy-saving mode; sending a shutdown instruction to the second controller, so that the second controller controls the AC auxiliary power supply to turn on and sends a first shutdown signal to the DC auxiliary power supply according to the shutdown instruction; sending a second shutdown signal to the DC auxiliary power supply so that the DC auxiliary power supply enters a shutdown state in response to the common input of the first shutdown signal and the second shutdown signal; The first controller is specifically used for: determining a fault type according to the fault information; If the fault type is an undervoltage fault of the battery module, determining the first power reduction mode as the target power reduction mode; If the fault type is the first controller fault or the second controller fault, the second power reduction mode is determined to be the target power reduction mode.

2. The energy storage system according to claim 1, characterized in that: Before determining the first consumption reduction mode as the target consumption reduction mode, the first controller is further configured to: Obtaining a first abnormal duration, where the first abnormal duration is a duration during which the fault type remains the battery module undervoltage fault; If the first abnormal time reaches a first preset time, the first power reduction mode is determined to be the target power reduction mode.

3. The energy storage system according to claim 1, characterized in that: Before determining the second consumption reduction mode as the target consumption reduction mode, the first controller is further configured to: Acquire a second abnormal duration, where the second abnormal duration is a duration during which the fault type remains the first controller fault or the second controller fault; If the second abnormal time reaches a second preset time, the second power reduction mode is determined to be the target power reduction mode.

4. The energy storage system according to claim 1, characterized in that: If the target power reduction mode is the first power reduction mode, the first controller is further configured to: Acquire a first operating duration, where the first operating duration is a duration during which the first controller operates in the first power reduction mode; When the first operation time reaches a third preset time, the first power saving mode is exited.

5. The energy storage system according to claim 1, characterized in that: If the target power reduction mode is the second power reduction mode, the first controller is further configured to: The operation data is saved every fourth preset time period.

6. The energy storage system according to claim 1, characterized in that: The second controller is specifically used for: If the first controller communicates normally with the second controller, the shutdown instruction is obtained, the AC auxiliary power supply is controlled to be turned on, and a first shutdown signal is sent to the DC auxiliary power supply; If the communication between the first controller and the second controller is abnormal, the third abnormal duration is confirmed, wherein the third abnormal duration is the duration of the communication abnormality. When the third abnormal duration reaches the fifth preset duration, the AC auxiliary power supply is controlled to turn on and a first shutdown signal is sent to the DC auxiliary power supply.

7. A consumption reduction control method, characterized in that: Applied to the energy storage system according to any one of claims 1 to 6, the method comprises: Obtaining the fault information; Determining a target power consumption reduction mode according to the fault information; operating in the target energy-saving mode; sending a shutdown instruction to the second controller, so that the second controller controls the AC auxiliary power supply to turn on and sends a first shutdown signal to the DC auxiliary power supply according to the shutdown instruction; sending a second shutdown signal to the DC auxiliary power supply so that the DC auxiliary power supply enters a shutdown state in response to the common input of the first shutdown signal and the second shutdown signal; The determining a target power consumption reduction mode according to the fault information includes: determining a fault type according to the fault information; If the fault type is an undervoltage fault of the battery module, determining the first power reduction mode as the target power reduction mode; If the fault type is the first controller fault or the second controller fault, the second power reduction mode is determined to be the target power reduction mode.

8. The method according to claim 7, characterized in that Before determining the first consumption reduction mode as the target consumption reduction mode, the method further includes: Obtaining a first abnormal duration, where the first abnormal duration is a duration during which the fault type remains the battery module undervoltage fault; If the first abnormal time reaches a first preset time, the first power reduction mode is determined to be the target power reduction mode.

9. The method according to claim 7, characterized in that: Before determining the second power reduction mode as the target power reduction mode, the method further includes: Acquire a second abnormal duration, where the second abnormal duration is a duration during which the fault type remains the first controller fault or the second controller fault; If the second abnormal time reaches a second preset time, the second power reduction mode is determined to be the target power reduction mode.

10. The method according to claim 7, characterized in that If the target power reduction mode is the first power reduction mode, the method further includes: Acquire a first operating duration, where the first operating duration is a duration during which the first controller operates in the first power reduction mode; When the first operation time reaches a third preset time, the first power saving mode is exited.

11. The method according to claim 7, characterized in that If the target power reduction mode is the second power reduction mode, the method further includes: The operation data is saved every fourth preset time period.

12. A controller, characterized in that: It includes a memory and a processor, the memory is connected to the processor, the processor is used to execute one or more computer programs stored in the memory, and when the processor executes the one or more computer programs, the controller implements the consumption reduction control method as described in any one of claims 7-11.

13. A power supply system, characterized in that: include: load; And the energy storage system according to any one of claims 1 to 6.

Images