Charging activation device, energy storage system and activation method thereof

Abstract

The invention provides a charging activation device, an energy storage system and an activation method thereof, and belongs to the technical field of energy storage systems. The charging activation device comprises a standby battery pack, a boost inverter circuit, a voltage acquisition circuit and a microcontroller unit. Wherein the standby battery pack is used for providing a power supply for the boost inverter circuit and the microcontroller unit; the boost inverter circuit is used for boosting the input voltage to an activation voltage threshold of a battery management system of the energy storage system; the voltage acquisition circuit is used for acquiring the output voltage of an energy storage battery of the energy storage system; when the microcontroller unit detects that the energy storage system is in a locked state, the microcontroller unit can control to open the boost inverter circuit so as to boost an input voltage of the boost inverter circuit to an activation voltage threshold of a battery management system of the energy storage system and output the input voltage, so that the battery management system recovers a charging and discharging loop, and the energy storage system is activated. Automatic wakeup of the energy storage battery in the dormant state can be achieved, manual intervention is not needed, and dependence on manpower or external equipment is eliminated.

Description

Technical Field

[0001] This application relates to the field of energy storage system technology, and in particular to a charging activation device, an energy storage system and its activation method. Background Technology

[0002] Energy storage systems in the power sector typically include a power source, an energy storage inverter, and energy storage batteries. In such systems, if the power source is not outputting power for an extended period, the energy storage batteries, which have been supplying power to the load for a long time, are prone to depletion and entering a "discharged" dormant state. For example, in photovoltaic energy storage systems, when the photovoltaic array has no voltage output, the energy storage batteries will lock up after depletion.

[0003] When an energy storage battery is locked, it cannot be used normally and needs to be activated. Currently, the relevant technology involves the energy storage inverter (PCS) activating the battery through the communication interface of the battery management system (BMS), reviving the battery from its sleep state and allowing the energy storage system to resume normal operation. However, when the battery voltage falls below the protection threshold, the BMS will not actively open the charging / discharging circuit, and the energy storage system still cannot return to normal operation, failing to completely solve the problem and introducing an element of chance. Another related technology involves using an external dedicated charging device to charge the battery, reviving it from its sleep state and allowing the energy storage system to resume normal operation. However, this method is wasteful of manpower, resources, and time, resulting in a poor user experience. Summary of the Invention

[0004] To address the aforementioned issues, this application proposes a charging activation device, an energy storage system, and an activation method thereof. The aim is to activate the energy storage system by controlling the activation of the boost inverter circuit when the microcontroller unit detects that the energy storage system is in a locked state. This enables automatic activation of the energy storage system without requiring on-site maintenance personnel, reducing manpower, material resources, and time costs, and improving the user experience.

[0005] To achieve the above objectives, a first aspect of this application provides a charging activation device for activating an energy storage system, comprising a backup battery pack, a boost inverter circuit, a voltage acquisition circuit, and a microcontroller unit, wherein: The first terminal of the boost inverter circuit is connected to the positive terminal of the backup battery pack, the second terminal of the boost inverter circuit is connected to the negative terminal of the backup battery pack, the third terminal of the boost inverter circuit is used to connect to the positive output terminal of the energy storage battery of the energy storage system, the fourth terminal of the boost inverter circuit is used to connect to the negative output terminal of the energy storage battery of the energy storage system, the first terminal of the boost inverter circuit is also connected to the first terminal of the microcontroller unit, and the fifth terminal of the boost inverter circuit is connected to the second terminal of the microcontroller unit. The first terminal of the voltage acquisition circuit is used to connect to the positive output terminal of the energy storage battery of the energy storage system, and the second terminal of the voltage acquisition circuit is connected to the third terminal of the microcontroller unit. The fourth terminal of the microcontroller unit is connected to the negative terminal of the backup battery pack and the negative output terminal of the energy storage battery of the energy storage system, and the fifth terminal of the microcontroller unit is used to connect to the communication interface. The backup battery pack is used to provide power to the boost inverter circuit and the microcontroller unit; The boost inverter circuit is used to boost the input voltage to the activation voltage threshold of the battery management system of the energy storage system; The voltage acquisition circuit is used to acquire the output voltage of the energy storage battery in the energy storage system. The microcontroller unit is used for: Based on the output voltage of the energy storage battery of the energy storage system acquired by the voltage acquisition circuit and the communication status of the energy storage converter obtained through the communication interface, it is determined whether the energy storage system is in a locked state. When the energy storage system is determined to be in a locked state, the boost inverter circuit is activated to raise the input voltage of the boost inverter circuit to the activation voltage threshold of the battery management system of the energy storage system and output it, so that the battery management system can resume the charging and discharging circuit.

[0006] In one embodiment of this application, the device further includes a switch button connected to the microcontroller unit, and correspondingly, the microcontroller unit is further configured to: When the switch button is detected to be triggered, the boost inverter circuit is turned on to increase the input voltage of the boost inverter circuit to the activation voltage threshold of the battery management system of the energy storage system and output it, so that the battery management system resumes the charging and discharging circuit.

[0007] In one embodiment of this application, the device further includes a first control switch circuit, a first terminal of which is connected to the positive terminal of the backup battery pack, a second terminal of which is connected to the first terminal of the boost inverter circuit, and a third terminal of which is connected to the first terminal of the microcontroller unit; correspondingly, the microcontroller unit is used for: Send a first control signal to the first control switch circuit to turn on the first control switch circuit, thereby turning on the boost inverter circuit; A second control signal is sent to the first control switch circuit to disconnect the first control switch circuit, thereby shutting down the boost inverter circuit.

[0008] In one embodiment of this application, the device further includes a first isolation circuit, a first terminal of which is connected to a third terminal of the boost inverter circuit, a second terminal of which is connected to the positive output terminal of the energy storage battery of the energy storage system, and the first isolation circuit is used to prevent energy from the energy storage system from flowing back into the boost inverter circuit.

[0009] In one embodiment of this application, the device further includes a current-limiting charging circuit, a first terminal of which is connected to the positive terminal of the backup battery pack, a second terminal of which is connected to the positive output terminal of the energy storage battery of the energy storage system, and the second terminal of which is also connected to the sixth terminal of the microcontroller unit. The current-limiting charging circuit is used to provide charging power to the backup battery pack when the energy storage system is working normally; Correspondingly, the microcontroller unit is used to control the opening of the current-limiting charging circuit when the energy storage system is working normally, and to control the closing of the current-limiting charging circuit when it is determined that the energy storage system is in a locked state.

[0010] In one embodiment of this application, the device further includes a second control switch circuit, a first terminal of which is connected to a second terminal of the current-limiting charging circuit, a second terminal of which is used to connect to the positive output terminal of the energy storage battery of the energy storage system, and a third terminal of which is connected to a sixth terminal of the microcontroller unit. Correspondingly, the microcontroller unit is further used for: When the energy storage system is working normally, a first signal is sent to the second control switch circuit to turn on the second control switch circuit and activate the current-limiting charging circuit. When it is determined that the energy storage system is in a locked state, a second signal is sent to the second control switch circuit to disconnect the second control switch circuit and shut down the current-limiting charging circuit.

[0011] In one embodiment of this application, the device further includes a second isolation circuit, a first terminal of which is connected to the positive output terminal of the energy storage battery of the energy storage system, and a second terminal of which is connected to the second terminal of the current-limiting charging circuit. The second isolation circuit is used to prevent energy from flowing from the current-limiting charging circuit to the energy storage system.

[0012] In one embodiment of this application, the device further includes a short-circuit protection circuit, the first terminal of which is connected to the third terminal of the boost inverter circuit, and the second terminal of which is connected to the positive output terminal of the energy storage battery of the energy storage system. The short-circuit protection circuit is used to disconnect the charging activation device from the energy storage system when a short-circuit fault occurs in the internal circuit of the charging activation device.

[0013] In one embodiment of this application, the device further includes a power management module connected in parallel across the positive and negative terminals of the backup battery pack. The power management module is used to convert the output voltage of the backup battery pack into the operating voltage required by the microcontroller unit.

[0014] To achieve the above objectives, a second aspect of this application provides an energy storage system, comprising: Energy storage batteries are used to store energy. A battery management system is connected in parallel across the energy storage battery, and the battery management system is used to monitor the battery status of the energy storage battery; The charging activation device described in any embodiment of this application is connected in parallel across the two ends of the energy storage battery.

[0015] To achieve the above objectives, a third aspect of this application provides an activation method for an energy storage system, applied to the charging activation device described in any embodiment of this application, the method comprising: Collect the output voltage of the energy storage battery of the energy storage system and the communication status of the energy storage converter of the energy storage system; Based on the output voltage of the energy storage battery and the communication status of the energy storage converter, determine whether the energy storage system is in a locked state. When the energy storage system is determined to be in a locked state, the boost inverter circuit of the charging activation device is activated to increase the input voltage of the boost inverter circuit to the activation voltage threshold of the battery management system of the energy storage system and output it, so that the battery management system can restore the charging and discharging circuit.

[0016] In the technical solution provided in this application embodiment, the charging activation device includes a backup battery pack, a boost inverter circuit, a voltage acquisition circuit, and a microcontroller unit. The backup battery pack provides power to the boost inverter circuit and the microcontroller unit. The boost inverter circuit raises the input voltage to the activation voltage threshold of the battery management system of the energy storage system. The voltage acquisition circuit acquires the output voltage of the energy storage battery in the energy storage system. The microcontroller unit determines whether the energy storage system is in a locked state based on the output voltage of the energy storage battery detected by the voltage acquisition circuit and the communication status of the energy storage converter obtained through the communication interface. When the energy storage system is detected to be in a locked state, the microcontroller unit can control the boost inverter circuit to be turned on, raising the input voltage of the boost inverter circuit to the activation voltage threshold of the battery management system of the energy storage system and outputting it, thereby restoring the charging and discharging circuit of the battery management system and activating the energy storage system. This enables automatic wake-up of the energy storage battery from its dormant state without manual intervention, eliminating reliance on manual operation or external equipment.

[0017] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit this application. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the specification, serve to explain the principles of this application.

[0019] Figure 1 This is a first structural block diagram of a charging activation device provided in an embodiment of this application.

[0020] Figure 2 yes Figure 1 The circuit diagram of the charging activation device is shown.

[0021] Figure 3 This is a second structural block diagram of a charging activation device provided in an embodiment of this application.

[0022] Figure 4 This is a third structural block diagram of a charging activation device provided in an embodiment of this application.

[0023] Figure 5 yes Figure 4 The circuit diagram of the charging activation device is shown.

[0024] Figure 6 This is a fourth structural block diagram of a charging activation device provided in an embodiment of this application.

[0025] Figure 7 yes Figure 6 The circuit diagram of the charging activation device is shown.

[0026] Figure 8This is a structural block diagram of an energy storage system provided in an embodiment of this application.

[0027] Figure 9 This is a flowchart of an activation method for an energy storage system provided in an embodiment of this application.

[0028] Figure label: 10. Charging activation device; 100. Backup battery pack; 200. Boost inverter circuit; 300. Voltage acquisition circuit; 400. Microcontroller unit; 500. Switch button; 600. First control switch circuit; 700. First isolation circuit; 800. Current-limiting charging circuit; 900. Second control switch circuit; 1000. Second isolation circuit; 1100. Short circuit protection circuit; 1200. Power management module. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0030] It should be noted that although functional modules are divided in the device schematic diagram and a logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than the module division in the device or the order in the flowchart. The terms "first," "second," etc., in the specification, claims, and the aforementioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of this application only and is not intended to limit this application.

[0032] A basic home energy storage system is configured with "solar panels + grid-connected (or off-grid) inverter + lithium battery system". The lithium battery is responsible for storing electrical energy, while the PCS (Power Supply System) is responsible for drawing power from the grid or solar panels to charge the lithium battery system, selling electricity to the grid, or providing uninterrupted power to critical loads during grid power outages. The PCS can be connected to the energy storage battery via the main circuit, and it can also be connected to the battery management system (BMS) via a communication circuit.

[0033] After a mains power outage, the energy storage system operates off-grid, supplying power to critical loads. When the lithium battery system is completely depleted and there is no mains or solar power replenishment, the battery management system (BMS) will eventually shut down its output to ensure that the battery system is not damaged due to complete depletion.

[0034] When mains power is restored or the photovoltaic system starts operating, the PCS (Power Control System) begins to function due to the availability of power. At this point, the PCS first checks if the lithium battery is connected (detecting the input voltage of the battery interface). If a normal battery voltage is detected at the interface, the PCS will then begin operating and charging the battery. However, because the lithium battery system is in an off-state during the voltage detection, the PCS cannot detect the battery voltage and therefore will not charge it. The lithium battery requires a valid charging voltage to activate the system, thus opening the charging port and restoring the battery interface voltage.

[0035] It is evident that even when mains power or photovoltaic power is restored, the lithium battery system is in an output-off state, causing the PCS to be unable to detect the voltage of the lithium battery, thus completely locking up the energy storage system and preventing it from continuing to work.

[0036] In related technologies, after the mains power is restored or photovoltaic power is available, the PCS activates the battery BMS through the BMS communication interface, allowing the lithium battery to wake up from its sleep state and thus enabling the energy storage system to resume normal operation. Alternatively, an external lithium battery charger can be used to charge the lithium battery, waking it up from its sleep state and allowing the energy storage system to resume normal operation.

[0037] However, when the lithium battery BMS is activated via the communication interface, if the voltage of a single cell recovers to above the protection threshold, the BMS will open the charging / discharging circuit. The PCS will detect the battery and charge it, thus restoring the entire system to normal. However, if the voltage of a single cell remains below the protection value, the BMS will not actively open the charging / discharging circuit, and the energy storage system will still not return to normal. This problem cannot be completely resolved and remains unpredictable. Dedicated charging equipment is generally used as a maintenance tool by maintenance personnel. This equipment also requires an external power supply and connection to the battery system. In actual operating conditions, these conditions may not be available, and operation by non-professionals can be dangerous, wasting manpower, resources, and time.

[0038] Based on this, this application proposes a charging activation device, which aims to activate the energy storage system by controlling the start of the boost inverter circuit when the microcontroller unit detects that the energy storage system is in a locked state. This enables automatic activation of the energy storage system without the need for maintenance personnel to go to the site, thereby reducing manpower, material resources and time costs and improving the user experience.

[0039] Reference Figure 1 , Figure 1 This is a first structural block diagram of a charging activation device provided in an embodiment of this application. Figure 1 As shown, the charging activation device 10 includes a backup battery pack 100, a boost inverter circuit 200, a voltage acquisition circuit 300, and a microcontroller unit 400.

[0040] The first terminal of the boost inverter circuit 200 is connected to the positive terminal of the backup battery pack 100, the second terminal of the boost inverter circuit 200 is connected to the negative terminal of the backup battery pack 100, the third terminal of the boost inverter circuit 200 is used to connect to the positive output terminal P+ of the energy storage battery of the energy storage system, the fourth terminal of the boost inverter circuit 200 is used to connect to the negative output terminal P- of the energy storage battery of the energy storage system, the first terminal of the boost inverter circuit 200 is also connected to the first terminal of the microcontroller unit 400, and the fifth terminal of the boost inverter circuit 200 is connected to the second terminal of the microcontroller unit 400.

[0041] The first terminal of the voltage acquisition circuit 300 is connected to the positive output terminal P+ of the energy storage battery of the energy storage system, and the second terminal of the voltage acquisition circuit 300 is connected to the third terminal of the microcontroller unit 400.

[0042] The fourth terminal of the microcontroller unit 400 is connected to the negative terminal of the backup battery pack 100 and the negative terminal P- of the energy storage battery of the energy storage system. The fifth terminal of the microcontroller unit 400 is used to connect to the communication interface.

[0043] In this embodiment, the backup battery pack 100 is connected to both the boost inverter circuit 200 and the microcontroller unit 400, thereby providing a stable power supply to both circuits and ensuring that the charging activation device 10 can still operate normally even when the energy storage battery is locked. During automatic activation, the backup battery pack 100 acts as a temporary energy source, generating an activation voltage through the boost inverter circuit 200 to wake up the BMS of the energy storage system. After the energy storage system locks up due to depletion of power, the backup battery pack 100 acts as a backup power source, supporting the device in completing detection, boosting, and activation operations without relying on external charging equipment.

[0044] The backup battery pack 100 is typically composed of multiple lithium batteries connected in series or parallel, and supplies power to the boost inverter circuit 200 and the microcontroller unit 400 through internal circuitry. In sleep mode, the backup battery pack 100 can maintain extremely low power consumption (μA level), ensuring long standby capability.

[0045] The boost inverter circuit 200 is used to boost the input voltage of the boost inverter circuit 200 to the activation voltage threshold of the battery management system of the energy storage system and output it to activate the battery management system. Specifically, the boost inverter circuit 200 boosts the low voltage (e.g., 3.7V lithium battery) of the internal backup battery pack 100 to a voltage (e.g., 12V or 24V) sufficient to activate the energy storage system BMS through the boost boost circuit, solving the problem of the energy storage battery locking up and unable to charge due to depletion. During automatic or manual activation, the boost inverter circuit 200 provides the initial charging voltage to the energy storage system, forcibly wakes up the BMS and restores the charging and discharging circuit.

[0046] The boost inverter circuit 200 is controlled by the microcontroller unit 400 and only starts the boost operation when the energy storage system is detected to be locked, thus avoiding unnecessary energy consumption.

[0047] The voltage acquisition circuit 300 is used to acquire the output voltage of the energy storage battery in the energy storage system. The first terminal of the voltage acquisition circuit 300 is connected to the positive output terminal P+ of the energy storage battery, and the second terminal is connected to the microcontroller unit 400. The voltage acquisition circuit 300 uses voltage divider resistors to proportionally divide the high voltage (e.g., 48V) of the energy storage battery to the ADC input range of the microcontroller unit 400. The ADC module of the microcontroller unit 400 reads the filtered voltage value and uses software to calculate and reconstruct the actual output voltage of the energy storage battery.

[0048] The microcontroller unit 400 is connected to the backup battery pack 100, the boost inverter circuit 200, and the voltage acquisition circuit 300, respectively. The microcontroller unit 400 is also connected to a communication interface. Therefore, the microcontroller unit 400 can determine whether the energy storage system is in a locked state based on the output voltage of the energy storage battery acquired by the voltage acquisition circuit 300 and the communication status of the energy storage converter obtained through the communication interface. Specifically, when the microcontroller unit 400 detects that the output voltage of the energy storage battery is continuously lower than the BMS activation threshold (i.e., the BMS shuts down its output due to low-voltage protection), and the PCS has resumed power supply (mains / photovoltaic input is normal), but the system still has no response, the energy storage system can be determined to be in a locked state. The microcontroller unit 400 obtains the operating status of the PCS through the communication interface (such as CAN or RS485) connected to the energy storage system. If the PCS returns error codes such as "battery not connected" or "no effective voltage," and the microcontroller unit 400 confirms that the energy storage battery has no output, the locked-down determination is strengthened. The microcontroller unit 400 can periodically detect the output voltage of the energy storage battery and read the communication information between the PCS and the BMS through the communication interface between the energy storage system and the energy storage inverter (PCS). It then intelligently analyzes and predicts the operating status of the entire energy storage system based on the communication protocol. If it detects that there is no voltage output at the output terminal of the energy storage system (the positive output terminal P+ of the energy storage battery), and the BMS does not respond normally when the energy storage inverter reads the BMS data, or if the BMS response contains serious faults such as low cell voltage or low total voltage causing the BMS to shut down the discharge circuit, the microcontroller unit 400 sends a control signal to the boost inverter circuit 200 to activate the boost inverter circuit 200. This boosts the input voltage to the activation voltage threshold of the battery management system of the energy storage system, allowing the battery management system to resume its charging and discharging circuit, thereby activating the energy storage system.

[0049] Reference Figure 2 , Figure 2 yes Figure 1 The circuit diagram of the charging activation device is shown.

[0050] Depend on Figure 2 As shown, the backup battery pack 100 can be composed of multiple lithium batteries connected in series.

[0051] The voltage acquisition circuit 300 includes voltage divider resistors R5 and R6, and a third capacitor C3. The first terminal of voltage divider resistor R5 is connected to the positive output terminal P+ of the energy storage battery in the energy storage system. The second terminal of voltage divider resistor R5 is connected to the first terminal of voltage divider resistor R6, and the second terminal of voltage divider resistor R6 is grounded. The first terminal of the third capacitor C3 is connected between the second terminals of voltage divider resistors R5 and R6, and is also connected to the microcontroller unit 400. The second terminal of the third capacitor C3 is connected to the second terminal of voltage divider resistor R6 and then grounded together.

[0052] In this design, voltage divider resistors R5 and R6 proportionally divide the high voltage of the energy storage battery to the ADC input range of the microcontroller unit 400. The third capacitor, C3, is a filter capacitor used to filter out high-frequency noise and ensure the stability of the ADC sampling signal. The output voltage of the energy storage battery, after being divided by resistors R5 and R6, outputs an analog signal proportional to the total voltage. The third capacitor C3 performs a low-pass filter on the divided signal to eliminate high-frequency interference (such as ripple introduced by the switching circuit). The ADC module of the microcontroller unit 400 reads the filtered voltage value and uses software to calculate and reconstruct the actual output voltage of the energy storage battery.

[0053] Depend on Figure 2As shown, the boost inverter circuit 200 includes a first inductor L1, a first MOSFET switch Q1, a freewheeling diode D1, a first capacitor C1, a second capacitor C2, a minimum load resistor R0, and a drive management module. The first terminal of the first inductor L1 is connected to the positive terminal of the backup battery pack 100, and the second terminal of the first inductor L1 is connected to the source S of the first MOSFET switch Q1 and the positive terminal of the freewheeling diode D1. The drain D of the first MOSFET switch Q1 is connected to the negative terminal of the backup battery pack 100, and also to the negative output terminal P- of the energy storage battery in the energy storage system. The gate G of the first MOSFET switch Q1 is connected to the first terminal of the drive management module, and the second terminal of the drive management module is connected to the microcontroller unit 400. The negative terminal of the freewheeling diode D1 is connected to the positive output terminal P+ of the energy storage battery in the energy storage system. The first terminal of the first capacitor C1 is connected between the negative terminal of the freewheeling diode D1 and the positive output terminal P+ of the energy storage battery in the energy storage system. The second terminal of the first capacitor C1 is connected between the drain D of the first MOSFET switch Q1 and the negative output terminal P- of the energy storage battery in the energy storage system. The first terminal of the second capacitor C2 is connected between the negative terminal of the freewheeling diode D1 and the positive output terminal P+ of the energy storage battery in the energy storage system. The second terminal of the second capacitor C2 is connected between the drain D of the first MOSFET switch Q1 and the negative output terminal P- of the energy storage battery in the energy storage system. The first terminal of the minimum load resistor R0 is connected between the negative terminal of the freewheeling diode D1 and the positive output terminal P+ of the energy storage battery in the energy storage system. The second terminal of the minimum load resistor R0 is connected between the drain D of the first MOSFET switch Q1 and the negative output terminal P- of the energy storage battery in the energy storage system.

[0054] In this circuit, the first inductor L1 serves as an energy storage element, accumulating and releasing energy through the switching of the first MOSFET switch Q1. The first MOSFET switch Q1 is driven by a PWM signal generated by the drive management module, periodically turning on and off to create oscillation. That is, the PWM signal controls the switching sequence of the MOSFET switch Q1, determining the energy storage / release cycle of the first inductor L1. The freewheeling diode D1 provides a current path when the first MOSFET switch Q1 is off, maintaining the output voltage. The freewheeling diode D1 ensures unidirectional current flow. The first capacitor C1 and the second capacitor C2 are filter capacitors used to smooth the output voltage and reduce ripple interference. The minimum load resistor R0 ensures circuit stability under no-load conditions. The drive management module is responsible for generating the PWM signal to control the first MOSFET switch Q1, adjusting the duty cycle of the boost inverter circuit 200, and achieving precise control of the output voltage. The drive management module can adjust the switching frequency in real time according to the instructions of the microcontroller unit 400 to ensure rapid and stable boosting (e.g., instantaneous output of 12V / 24V is required when activating the energy storage system BMS).

[0055] The specific working process of the charging activation device 10 is as follows: When the microcontroller unit 400 detects that the energy storage system is in a locked state, it sends a command to the drive management module. The drive management module generates a PWM signal according to the command from the microcontroller unit 400, controlling the first MOSFET switch Q1. When the first MOSFET switch Q1 is turned on, the first inductor L1 stores energy; when the first MOSFET switch Q1 is turned off, the first inductor L1 releases energy and outputs a high voltage to the load terminal through the freewheeling diode D1. The first capacitor C1 and the second capacitor C2 filter and output a stable boosted voltage to the energy storage system interface. The boosted voltage triggers the BMS to wake up, restoring the battery charging and discharging circuit, thereby activating the energy storage system.

[0056] Continue to refer to Figure 2 The charging activation device 10 also includes a sampling resistor RS. The first terminal of the sampling resistor RS is connected to the drain D of the first MOSFET switch Q1, and the second terminal of the sampling resistor RS is connected to the negative output terminal P- of the energy storage battery in the energy storage system. Furthermore, the sampling resistor RS is connected in parallel across the microcontroller unit 400.

[0057] When the current in the boost inverter circuit 200 is abnormal (such as a short circuit or sudden load change), the current value detected by the sampling resistor RS exceeding the threshold will trigger the protection mechanism of the microcontroller unit 400, immediately shutting down the boost inverter circuit 400 (e.g., controlling Q1 to stop PWM drive) to prevent damage to the backup battery pack 100 or boost components (such as L1, Q1, etc.). The microcontroller unit 400 can dynamically adjust the PWM duty cycle according to the current feedback from the sampling resistor RS to optimize boost efficiency and avoid continuous overcurrent. When the boost inverter circuit 200 outputs high voltage to wake up the BMS, the current change detected by the sampling resistor RS can confirm whether the BMS has responded (e.g., a sudden increase in current indicates that the charging circuit has been turned on).

[0058] In this embodiment, after the PCS resumes power supply, the microcontroller unit 400 determines whether the energy storage system is in a locked state based on the output voltage of the energy storage battery detected by the voltage acquisition circuit 300 and the communication status of the energy storage converter obtained through the communication interface. When the energy storage system is detected to be in a locked state, the microcontroller unit 400 can control the activation of the boost inverter circuit 200 to raise the input voltage of the boost inverter circuit 200 to the activation voltage threshold of the battery management system of the energy storage system and output it, thereby restoring the charging and discharging circuit of the battery management system and activating the energy storage system. This enables automatic wake-up of the energy storage battery from its dormant state without manual intervention, eliminating dependence on manual intervention or external equipment.

[0059] In some embodiments, refer to Figure 3 , Figure 3This is a second structural block diagram of a charging activation device provided in an embodiment of this application. Figure 3 As shown, the charging activation device 10 includes a backup battery pack 100, a boost inverter circuit 200, a voltage acquisition circuit 300, and a microcontroller unit 400, as well as a switch button 500.

[0060] The switch button 500 is connected to the microcontroller unit 400. Correspondingly, the microcontroller unit 400 is also used to control the start of the boost inverter circuit 200 when the switch button 500 is detected to be triggered, so as to boost the input voltage of the boost inverter circuit 200 to the activation voltage threshold of the battery management system of the energy storage system, so that the battery management system can restore the charging and discharging circuit.

[0061] Specifically, when the operator finds that the energy storage system has no voltage output and the PCS cannot activate the energy storage system, and manual activation of the energy storage system is required, the operator can press the switch button 500. The microcontroller unit 400 detects that the switch button 500 is turned on and starts the boost inverter circuit 200 inside the device. This boosts the voltage supplied by the backup battery pack 100 to the boost inverter circuit 200 to the BMS activation voltage threshold, thereby activating the energy storage system. Thus, a locked energy storage system can be activated by manually triggering the switch button 500.

[0062] In this embodiment, when the switch button 500 is triggered, the microcontroller unit 400 immediately starts the boost inverter circuit 200. The boost inverter circuit 200 increases the voltage supplied by the backup battery pack 100 to the BMS activation voltage threshold, causing the BMS to recover from its dormant or protection state. Once the BMS is successfully activated, the charging and discharging circuit of the energy storage system is re-established, and the system can resume normal operation. That is, the charging activation device 10 provided in this embodiment supports both automatic detection activation and manual button activation, improving flexibility.

[0063] In some embodiments, refer to Figure 4 , Figure 4 This is a third structural block diagram of a charging activation device provided in an embodiment of this application. Figure 4 As shown, the charging activation device 10 includes a backup battery pack 100, a boost inverter circuit 200, a voltage acquisition circuit 300, a microcontroller unit 400, and a switch button 500, as well as a first control switch circuit 600. The first terminal of the first control switch circuit 400 is connected to the positive terminal of the backup battery pack 100, the second terminal of the first control switch circuit 600 is connected to the first terminal of the boost inverter circuit 200, and the third terminal of the first control switch circuit 600 is connected to the first terminal of the microcontroller unit 400.

[0064] The microcontroller unit 400 is used to send a first control signal to the first control switch circuit 600, so that the first control switch circuit 600 is turned on to start the boost inverter circuit 200. The microcontroller unit 400 is also used to send a second control signal to the first control switch circuit 600, causing the first control switch circuit 600 to disconnect, thereby shutting down the boost inverter circuit 200.

[0065] Reference Figure 5 , Figure 5 yes Figure 4 The circuit diagram of the charging activation device is shown. Figure 5 As shown, the first control switch circuit 600 includes a second MOSFET switch Q2, a first transistor Q6, a fourth resistor R4, a fifth resistor R5, and a fourth capacitor C4. The drain (D) of the second MOSFET switch Q2 is connected to the positive terminal of the backup battery pack 100, the source (S) of the second MOSFET switch Q2 is connected to the first terminal of the boost inverter circuit 200, and the gate (G) of the second MOSFET switch Q2 is connected to the collector of the first transistor Q6. The fourth resistor R4 is connected between the drain (D) and the gate (G) of the second MOSFET switch Q2. The emitter of the first transistor Q6 is grounded, the base of the first transistor Q6 is connected to the first terminal of the fifth resistor R5, and the second terminal of the fifth resistor R5 is connected to the microcontroller unit 400. The fourth capacitor C4 is connected between the emitter and base of the first transistor Q6.

[0066] In this embodiment, when the microcontroller unit 400 sends a first control signal (e.g., a high level), the first transistor Q6 is turned on. After the first transistor Q6 is turned on, the gate of the second MOSFET switch Q2 is pulled low, causing the second MOSFET switch Q2 to turn on. The boost inverter circuit 200 then receives input power and begins to operate. When the microcontroller unit 400 sends a second control signal (e.g., a low level), the first transistor Q6 is turned off, and the gate of the second MOSFET switch Q2 is not pulled low, causing the second MOSFET switch Q2 to turn off. The boost inverter circuit 200 cannot receive input power and therefore does not operate.

[0067] In this embodiment, the microcontroller unit 400 sends a control signal to the first control switch circuit 600 to achieve precise switching on and off of the boost inverter circuit 200, thereby avoiding unnecessary energy loss.

[0068] Continue to refer to Figure 4 and Figure 5The charging activation device 10 also includes a first isolation circuit 700. The positive terminal of the first isolation circuit 700 is connected to the third terminal of the boost inverter circuit 200, and the negative terminal of the first isolation circuit 700 is used to connect to the positive output terminal P+ of the energy storage battery of the energy storage system. The first isolation circuit 700 is used to prevent the energy of the energy storage system from flowing back into the boost inverter circuit 200.

[0069] In some embodiments, refer to Figure 5 The first isolation circuit 700 is the first diode D2. The positive terminal of the first diode D2 is connected to the third terminal of the boost inverter circuit 200 (i.e., the voltage output terminal of the boost inverter circuit 200), and the negative terminal of the first diode D2 is used to connect to the positive output terminal P+ of the energy storage battery of the energy storage system. The first diode D2 is used to prevent the energy of the energy storage system from flowing back into the boost inverter circuit 200.

[0070] It is understood that the first isolation circuit 700 may also include a MOSFET switching device and a driving circuit, that is, the driving circuit controls the MOSFET switching device to turn on or off to achieve electrical isolation between circuits and prevent reverse energy flow. This application does not specifically limit the first isolation circuit 700, as long as it can achieve the function of electrical isolation between circuits and prevent reverse energy flow.

[0071] In this embodiment, when the boost inverter circuit 200 is operating, the first isolation circuit 700 prevents the energy from the energy storage system from flowing back into the boost inverter circuit 200 through its unidirectional conduction characteristic, thus preventing the internal backup battery pack 100 from being discharged by the external system. In the device's sleep state, the first isolation circuit 700, in conjunction with the first control switch circuit 600, further isolates the boost inverter circuit 200 from the internal backup battery pack 100, ensuring that the static power consumption is reduced to the μA level.

[0072] This application embodiment addresses the activation scenario after the energy storage system is locked. The first isolation circuit 700 ensures that the boost inverter circuit 200 only outputs high voltage in one direction during the activation phase, which can avoid circuit failure or battery damage caused by energy backflow.

[0073] In some embodiments, refer to Figure 6 , Figure 6 This is a fourth structural block diagram of a charging activation device provided in an embodiment of this application. Figure 6As shown, the charging activation device 10 includes a backup battery pack 100, a boost inverter circuit 200, a voltage acquisition circuit 300, a microcontroller unit 400, a switch button 500, a first control switch circuit 600, and a first isolation circuit 700, as well as a current-limiting charging circuit 800. The first terminal of the current-limiting charging circuit 800 is connected to the positive terminal of the backup battery pack 100, and the second terminal is connected to the positive output terminal P+ of the energy storage battery in the energy storage system. The second terminal of the current-limiting charging circuit 800 is also connected to the sixth terminal of the microcontroller unit 400.

[0074] The current-limiting charging circuit 800 is used to provide charging power to the backup battery pack 100 when the energy storage system is operating normally. Correspondingly, the microcontroller unit 400 is used to control the opening of the current-limiting charging circuit 800 when the energy storage system is operating normally, and to control the closing of the current-limiting charging circuit 800 when it is determined that the energy storage system is in a locked state.

[0075] The charging activation device 10 can be in a charging state or a sleep state when the energy storage system is working normally. In the charging state, the current-limiting charging circuit 800 charges the internal backup battery pack 100. The microcontroller unit 400 can constantly monitor the operating status of the backup battery pack 100. When it detects that the internal backup battery pack 100 is fully charged, it can actively shut down the charging circuit and then put the entire charging activation device 10 into a sleep state to save energy. After the charging activation device 10 enters sleep mode, the power consumption of the entire charging activation device 10 can be reduced to below mA, ensuring that the charging activation device 10 can standby for a long time without external power supply. The microcontroller unit 400 can wake up from sleep mode periodically to determine whether the energy storage system is locked. If it detects that the energy storage system is locked, it can execute the automatic activation function. After the charging activation device 10 exits sleep mode, it can also simultaneously monitor the status of the backup battery pack 100. If it detects that the capacity of the backup battery pack 100 is lower than the backup power threshold, it can open the charging circuit to allow the current-limiting charging circuit 800 to charge the backup battery pack 100 to supplement the backup power energy.

[0076] In this embodiment, when the energy storage system is operating normally, the current-limiting charging circuit 800 can provide charging power to the backup battery pack 100 inside the device. Through the control signal from the microcontroller unit 400, the current-limiting charging circuit 800 can dynamically start or stop the charging process, ensuring that the charging behavior is synchronized with the system state.

[0077] Reference Figure 7 , Figure 7 yes Figure 6 The circuit diagram of the charging activation device is shown. Figure 7As shown, the current-limiting charging circuit 800 includes a first resistor R1, a second resistor R2, a third resistor R3, a second transistor Q4, a Zener diode DZ1, and an optocoupler U1. The first terminal of the first resistor R1 is connected to the positive terminal of the backup battery pack 100. The second terminal of the first resistor R1 is connected to the emitter of the second transistor Q4. The second terminal of the first resistor R1 is also connected to the first terminal of the second resistor R2. The second terminal of the second resistor R2 is connected to the base of the second transistor Q4. The collector of the second transistor Q4 is connected to the positive output terminal P+ of the energy storage battery in the energy storage system. The first terminal of the Zener diode DZ1 is connected to the positive terminal of the backup battery pack 100. The second terminal of the Zener diode DZ1 is connected to the second terminal of the second resistor R2 and then together connected to the base of the second transistor Q4. The base of the second transistor Q4 is also connected to the first terminal of the third resistor R3. The second terminal of the third resistor R3 is connected to the first terminal of the optocoupler U1. The second terminal of the optocoupler U1 is connected to the positive output terminal P+ of the energy storage battery in the energy storage system.

[0078] In this embodiment, the second transistor Q4 serves as the core component for current limiting, controlling the charging current. The Zener diode DZ1, the first resistor R1, and the base PN junction of the second transistor Q4 together constitute a constant current control circuit, maintaining a stable charging current through feedback adjustment. The optocoupler U1 receives the start signal from the microcontroller unit 400, triggering the current-limiting charging circuit 800 to turn on or off, achieving safe control under electrical isolation. Precise limitation of the charging current can be achieved through the base-emitter voltage feedback of the second transistor Q4 and the clamping effect of the Zener diode DZ1. The optocoupler U1 achieves physical isolation between the control signal and the high-voltage circuit, ensuring the safety of the control terminal. The Zener diode DZ1 prevents the charging voltage from exceeding the safe range, protecting the backup battery pack 100. A stable charging current can be achieved through the feedback adjustment of the R1-R3 resistor network and the second transistor Q4, improving charging efficiency.

[0079] In this embodiment, the microcontroller unit 400 can control the opening / closing of the current-limiting charging circuit 800 in real time according to the energy storage system status, achieving precise synchronization between charging behavior and system status. It automatically charges the backup battery pack 100 when the energy storage system is working normally, and immediately cuts off charging when the energy storage system locks up, avoiding unnecessary energy consumption.

[0080] Continue to refer to Figure 6 The charging activation device 10 also includes a second control switch circuit 900. The first terminal of the second control switch circuit 900 is connected to the second terminal of the current-limiting charging circuit 800, the second terminal of the second control switch circuit 900 is used to connect to the positive output terminal P+ of the energy storage battery of the energy storage system, and the third terminal of the second control switch circuit 900 is connected to the sixth terminal of the microcontroller unit 400.

[0081] Correspondingly, the microcontroller unit 400 is also used for: When the energy storage system is working normally, a first signal is sent to the second control switch circuit 900 to turn on the second control switch circuit 900 and activate the current-limiting charging circuit 800. When the energy storage system is determined to be in a locked state, a second signal is sent to the second control switch circuit 900, causing the second control switch circuit 900 to open and shut down the current-limiting charging circuit 800.

[0082] In this embodiment, the second control switch circuit 900 serves as the input switch of the current-limiting charging circuit 800, directly controlling the energy path between the energy storage battery pack and the backup battery pack 100. The dynamic start and stop of the charging path is achieved through signals sent by the microcontroller unit 400, ensuring that the energy storage system charges the backup battery pack 100 during normal operation and completely disconnects it when the energy storage system is in a locked state.

[0083] Reference Figure 7 The second control switch circuit 900 includes a third MOSFET switch Q3, a third transistor Q5, a sixth resistor R6, a seventh resistor R7, and a fifth capacitor C5. The source of the third MOSFET switch Q3 is connected to the second terminal of the current-limiting charging circuit 800, the drain of the third MOSFET switch Q3 is connected to the positive output terminal P+ of the energy storage battery in the energy storage system, and the gate of the third MOSFET switch Q3 is connected to the collector of the third transistor Q5. The sixth resistor R6 is connected between the drain and gate of the third MOSFET switch Q3. The emitter of the third transistor Q5 is grounded, the base of the third transistor Q5 is connected to the first terminal of the seventh resistor R7, and the second terminal of the seventh resistor R7 is connected to the microcontroller unit 400. The first terminal of the fifth capacitor C5 is connected between the base of the third transistor Q5 and the first terminal of the seventh resistor R7, and the second terminal of the fifth capacitor C5 is grounded.

[0084] In this embodiment, the third MOSFET switch Q3 serves as the main power switch, handling high-current switching, and its gate is driven by the third transistor Q5. The third transistor Q5, as a driver stage component, receives signals from the microcontroller unit 400 and controls the gate voltage of the third MOSFET switch Q3, achieving high-low level switching. The sixth resistor R6 and the seventh resistor R7 form a voltage divider network, limiting the base current of the third transistor Q5 and stabilizing the drive signal. The fifth capacitor C5 is a filter capacitor used to suppress high-frequency interference and ensure the purity of the control signal.

[0085] In this embodiment, the microcontroller unit 400 monitors the energy storage system status in real time. When the energy storage system is operating normally, it sends a first signal to the second control switch circuit 900 to turn on the third MOSFET switch Q3. When the energy storage system is locked, it sends a second signal to the second control switch circuit 900 to turn off the third MOSFET switch Q3, achieving millisecond-level dynamic start-stop of the charging path. By precisely controlling the energy path between the energy storage battery and the backup battery pack 100, ineffective charging can be avoided, and the system energy efficiency ratio can be improved.

[0086] Continue to refer to Figure 6 and Figure 7 The charging activation device 10 also includes a second isolation circuit 1000. The first end of the second isolation circuit 1000 is connected to the positive output terminal P+ of the energy storage battery of the energy storage system, and the second end of the second isolation circuit 1000 is connected to the second end of the current limiting charging circuit 800. The second isolation circuit 1000 is used to prevent energy from flowing from the current limiting charging circuit 800 to the energy storage system.

[0087] In some embodiments, refer to Figure 7 The second isolation circuit 1000 is the second diode D3. The positive terminal of the second diode D3 is connected to the positive output terminal P+ of the energy storage battery of the energy storage system, and the negative terminal of the second diode D3 is connected to the second terminal of the current limiting charging circuit 800. The second diode 1000 is used to prevent energy from flowing from the current limiting charging circuit 800 to the energy storage system.

[0088] It is understood that the second isolation circuit 1000 may also include a MOSFET switching device and a driving circuit, that is, the driving circuit controls the MOSFET switching device to turn on or off to achieve electrical isolation between circuits and prevent reverse energy flow. This application does not specifically limit the second isolation circuit 1000, as long as it can achieve the function of electrical isolation between circuits and prevent reverse energy flow.

[0089] In this embodiment, the main function of the second isolation circuit 1000 is to utilize the unidirectional conductivity of a diode to construct a unidirectional energy channel. Its positive terminal is connected to the energy storage battery P+, and its negative terminal is connected to the current-limiting charging circuit 800. This ensures that current can only flow from the energy storage battery to the current-limiting charging circuit 800 to charge the backup battery pack 100. Simultaneously, it effectively prevents reverse energy flow, i.e., prevents current from flowing back from the current-limiting charging circuit 800 to the energy storage system, thereby avoiding unnecessary energy loss and potential interference to the energy storage system.

[0090] When the energy storage system is in normal operation, the second isolation circuit 1000 allows charging current to flow; however, when the energy storage system enters a locked state, the second isolation circuit 1000 reliably cuts off this path. This ensures the unidirectionality and controllability of the charging process.

[0091] Continue to refer to Figure 6 and Figure 7 The charging activation device 10 also includes a short-circuit protection circuit 1100. The first terminal of the short-circuit protection circuit 1100 is connected to the third terminal of the boost inverter circuit 200, and the second terminal of the short-circuit protection circuit 1100 is connected to the positive output terminal P+ of the energy storage battery of the energy storage system.

[0092] The short-circuit protection circuit 1100 is used to disconnect the charging activation device 10 from the energy storage system when a short-circuit fault occurs in the internal circuit of the charging activation device 10.

[0093] The short-circuit protection circuit 1100 can be a fuse, circuit breaker, or similar device. The short-circuit protection circuit 1100 can instantly isolate the energy storage system in the event of an internal short circuit.

[0094] In some embodiments, refer to Figure 7 The short-circuit protection circuit 1100 is a fuse FU. The first terminal of the fuse FU is connected to the third terminal of the boost inverter circuit 200 (i.e., the voltage output terminal of the boost inverter circuit 200), and the second terminal of the fuse FU is connected to the positive output terminal P+ of the energy storage battery of the energy storage system. When a short-circuit fault occurs inside the device, the fuse FU will instantly disconnect the circuit connection, achieving rapid current isolation through the fuse FU's own fusing characteristics.

[0095] Continue to refer to Figure 6 and Figure 7 The charging activation device 10 also includes a power management module 1200. The power management module 1200 is connected in parallel across the positive and negative terminals of the backup battery pack 100. The power management module 1200 is used to convert the output voltage of the backup battery pack 100 into the operating voltage required by the microcontroller unit 400.

[0096] In this embodiment, the power management module 1200 provides a stable and low-power operating power supply to the microcontroller unit 400, ensuring that the power consumption of the device is controlled at the microampere (μA) level in standby mode, thus extending the service life of the internal backup battery pack 100. Through voltage regulation and filtering design, the power management module 1200 can prevent voltage fluctuations or interference from causing malfunctions in the microcontroller unit 400, thereby improving the system's anti-interference capability.

[0097] Specifically, the microcontroller unit 400 can periodically detect whether the energy storage system is in a locked state. When the energy storage system is operating normally, the power management module 1200 can convert the output voltage of the backup battery pack 100 to a voltage sufficient to keep the microcontroller unit 400 in a sleep state (or standby state), thus reducing power consumption. After a preset interval, the power management module 1200 can convert the output voltage of the backup battery pack 100 back to the voltage required for the microcontroller unit 400 to operate normally, causing the microcontroller unit 400 to exit sleep mode and perform the detection of whether the energy storage system is locked. In other words, by dynamically converting the output voltage of the backup battery pack 100 through the power management module 1200, the microcontroller unit 400 can maintain a sleep state during non-detection periods, significantly reducing power consumption compared to continuous operation; simultaneously, it allows for more efficient energy distribution from the backup battery pack 100, extending the overall battery life of the charging activation device.

[0098] In some embodiments, the charging activation device 10 may further include a communication module (not shown in the figure), which is electrically connected to the microcontroller unit 400. External devices (such as remote maintenance devices) can establish a communication connection with the charging activation device 10 through the communication module. Thus, when the energy storage system is found to be in a locked state, the external device (such as the remote maintenance device) can send an activation control signal to the microcontroller unit 400 in the charging activation device 10, so that the microcontroller unit 400 controls the boost inverter circuit 200 to start according to the activation control signal, raising the input voltage to the activation voltage threshold of the battery management system of the energy storage system, so that the battery management system restores the charging and discharging circuit, thereby remotely activating the energy storage system.

[0099] The communication module can be a Bluetooth module, infrared module, Wi-Fi module, RS485 module, or 4G module, etc. Correspondingly, the external device also needs to be equipped with a corresponding communication module to establish a communication connection.

[0100] Reference Figure 8 , Figure 8 This is a structural block diagram of an energy storage system provided in one embodiment of this application. The energy storage system includes an energy storage battery 30, a battery management system 20, and a charging activation device 10 provided in any embodiment of this application. The energy storage battery 30 is used to store energy; the battery management system 20 is connected in parallel across the energy storage battery 30 and is used to monitor the battery status of the energy storage battery 30; the charging activation device 10 is connected in parallel across the energy storage battery 30.

[0101] In this embodiment, the energy storage system includes a charging activation device 10 provided in any embodiment of this application. The microcontroller unit 400 in the charging activation device 10 can determine whether the energy storage system is in a locked state based on the output voltage of the energy storage battery detected by the voltage acquisition circuit 30 and the communication status of the energy storage inverter obtained through the communication interface. When the energy storage system is detected to be in a locked state, the microcontroller unit 400 can control the activation of the boost inverter circuit 200 to raise the input voltage of the boost inverter circuit 200 to the activation voltage threshold of the battery management system of the energy storage system, thereby restoring the charging and discharging circuit of the battery management system and activating the energy storage system. This enables automatic wake-up of the energy storage battery from its dormant state without manual intervention, eliminating reliance on manual labor or external equipment.

[0102] Reference Figure 9 , Figure 9 This is a flowchart of an activation method for an energy storage system provided in an embodiment of this application, which is executed by a charging activation device provided in any embodiment of this application, including but not limited to steps S910 to S930.

[0103] Step S910: Collect the output voltage of the energy storage battery of the energy storage system and the communication status of the energy storage converter of the energy storage system; Step S920: Determine whether the energy storage system is in a locked state based on the output voltage of the energy storage battery and the communication status of the energy storage converter. Step S930: When it is determined that the energy storage system is in a locked state, the boost inverter circuit of the charging activation device is controlled to be turned on, so as to boost the input voltage of the boost inverter circuit to the activation voltage threshold of the battery management system of the energy storage system and output it, so that the battery management system restores the charging and discharging circuit.

[0104] In this embodiment, the microcontroller unit 400 in the charging activation device can acquire the output voltage of the energy storage battery of the energy storage system through the voltage acquisition device 300 in the charging activation device 10, and obtain the communication status of the energy storage inverter of the energy storage system through the communication interface. Therefore, based on the output voltage of the energy storage battery detected by the voltage acquisition circuit 30 and the communication status of the energy storage inverter obtained through the communication interface, it can determine whether the energy storage system is in a locked state. When the energy storage system is detected to be in a locked state, the microcontroller unit 400 can control the activation of the boost inverter circuit 200 to raise the input voltage of the boost inverter circuit 200 to the activation voltage threshold of the battery management system of the energy storage system, thereby restoring the charging and discharging circuit of the battery management system and activating the energy storage system. This enables automatic wake-up of the energy storage battery from its dormant state without manual intervention, eliminating reliance on manual intervention or external equipment.

[0105] In some embodiments, when the energy storage system is in normal operation, the charging activation device remains in a dormant state and collects the output voltage of the energy storage battery and the communication status of the energy storage converter of the energy storage system at preset intervals to detect whether the energy storage system is in a locked state. Specifically, when the energy storage system is in normal operation, the power management module 1200 can convert the output voltage of the backup battery pack 100 to a voltage that can keep the microcontroller unit 400 in a dormant state, so that the microcontroller unit 400 is in a dormant state. At preset intervals, the microcontroller unit 400 controls the collection of the output voltage of the energy storage battery and the communication status of the energy storage converter of the energy storage system to detect whether the energy storage system is in a locked state, that is, the microcontroller unit 400 can periodically detect whether the energy storage system is in a locked state.

[0106] The embodiments of this application utilize the periodic sleep-wake mechanism of the microcontroller unit 400 to achieve low-power operation of the charging activation device 10.

[0107] The embodiments described in this application are for the purpose of more clearly illustrating the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided by the embodiments of this application. As those skilled in the art will know, with the evolution of technology and the emergence of new application scenarios, the technical solutions provided by the embodiments of this application are also applicable to similar technical problems.

[0108] Those skilled in the art will understand that the technical solutions shown in the figures do not constitute a limitation on the embodiments of this application, and may include more or fewer steps than shown, or combine certain steps, or different steps.

[0109] Those skilled in the art will understand that all or some of the steps in the methods disclosed above, as well as the functional modules / units in the systems and devices, can be implemented as software, firmware, hardware, or suitable combinations thereof.

[0110] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0111] It should be understood that in this application, "at least one (item)" means one or more, and "more than" means two or more. "And / or" is used to describe the relationship between related objects, indicating that three relationships can exist. For example, "A and / or B" can represent three cases: only A exists, only B exists, and both A and B exist simultaneously, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one (item) of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one (item) of a, b, or c can represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0112] The preferred embodiments of the present application have been described above with reference to the accompanying drawings, but this does not limit the scope of the claims of the present application. Any modifications, equivalent substitutions, and improvements made by those skilled in the art without departing from the scope and substance of the embodiments of the present application shall be within the scope of the claims of the present application.

Claims

1. A charge activation device for activating an energy storage system, characterized by, The device comprises a backup battery pack, a boost inverter circuit, a voltage acquisition circuit and a microcontroller unit, wherein: a first end of the boost inverter circuit is connected to a positive pole of the backup battery pack, a second end of the boost inverter circuit is connected to a negative pole of the backup battery pack, a third end of the boost inverter circuit is used for connecting a positive output end of an energy storage battery of the energy storage system, a fourth end of the boost inverter circuit is used for connecting a negative output end of the energy storage battery of the energy storage system, the first end of the boost inverter circuit is also connected to a first end of the microcontroller unit, a fifth end of the boost inverter circuit is connected to a second end of the microcontroller unit; a first end of the voltage acquisition circuit is used for connecting the positive output end of the energy storage battery of the energy storage system, a second end of the voltage acquisition circuit is connected to a third end of the microcontroller unit; a fourth end of the microcontroller unit is connected to the negative pole of the backup battery pack and the negative output end of the energy storage battery of the energy storage system, a fifth end of the microcontroller unit is used for connecting a communication interface; the backup battery pack is used for providing a power supply for the boost inverter circuit and the microcontroller unit; the boost inverter circuit is used for boosting an input voltage to an activation voltage threshold of a battery management system of the energy storage system; the voltage acquisition circuit is used for acquiring an output voltage of the energy storage battery of the energy storage system; the microcontroller unit is used for: judging whether the energy storage system is in a lock state according to the output voltage of the energy storage battery of the energy storage system acquired by the voltage acquisition circuit and a communication state of an energy storage converter obtained through the communication interface; when it is judged that the energy storage system is in the lock state, controlling to turn on the boost inverter circuit to boost the input voltage of the boost inverter circuit to the activation voltage threshold of the battery management system of the energy storage system and output, so that the battery management system restores a charge-discharge loop.

2. The apparatus of claim 1, wherein, The device further comprises a switch button connected to the microcontroller unit, and correspondingly, the microcontroller unit is further used for: when it is detected that the switch button is triggered, controlling to turn on the boost inverter circuit to boost the input voltage of the boost inverter circuit to the activation voltage threshold of the battery management system of the energy storage system and output, so that the battery management system restores the charge-discharge loop.

3. The apparatus of claim 1, wherein, The device further comprises a first control switch circuit, a first end of the first control switch circuit is connected to a positive pole of the backup battery pack, a second end of the first control switch circuit is connected to the first end of the boost inverter circuit, a third end of the first control switch circuit is connected to the first end of the microcontroller unit; correspondingly, the microcontroller unit is used for: sending a first control signal to the first control switch circuit to make the first control switch circuit conductive to turn on the boost inverter circuit; sending a second control signal to the first control switch circuit to make the first control switch circuit non-conductive to turn off the boost inverter circuit.

4. The apparatus of claim 1, wherein, The device further comprises a first isolation circuit, a first end of the first isolation circuit is connected to a third end of the boost inverter circuit, and a second end of the first isolation circuit is used to connect a positive output end of an energy storage battery of the energy storage system, and the first isolation circuit is used to prevent energy of the energy storage system from flowing reversely into the boost inverter circuit.

5. The apparatus of claim 1, wherein, The device further comprises a current-limiting charging circuit, a first end of the current-limiting charging circuit is connected to a positive electrode of the backup battery pack, a second end of the current-limiting charging circuit is used to connect the positive output end of the energy storage battery of the energy storage system, and the second end of the current-limiting charging circuit is also connected to a sixth end of the microcontroller unit. The current-limiting charging circuit is used to provide a charging power supply for the backup battery pack when the energy storage system is normally working. Correspondingly, the microcontroller unit is used to control the current-limiting charging circuit to be turned on when the energy storage system is normally working, and to control the current-limiting charging circuit to be turned off when it is determined that the energy storage system is in a locked state.

6. The apparatus of claim 5, wherein, The device further comprises a second control switch circuit, a first end of the second control switch circuit is connected to the second end of the current-limiting charging circuit, a second end of the second control switch circuit is used to connect the positive output end of the energy storage battery of the energy storage system, and a third end of the second control switch circuit is connected to the sixth end of the microcontroller unit, and correspondingly, the microcontroller unit is further used to: send a first signal to the second control switch circuit when the energy storage system is normally working, so that the second control switch circuit is turned on to turn on the current-limiting charging circuit; and send a second signal to the second control switch circuit when it is determined that the energy storage system is in a locked state, so that the second control switch circuit is turned off to turn off the current-limiting charging circuit. The device further comprises a second isolation circuit, a first end of the second isolation circuit is connected to the positive output end of the energy storage battery of the energy storage system, and a second end of the second isolation circuit is connected to the second end of the current-limiting charging circuit, and the second isolation circuit is used to prevent energy from flowing from the current-limiting charging circuit to the energy storage system.

7. The apparatus of claim 5, wherein, The device further comprises a short-circuit protection circuit, a first end of the short-circuit protection circuit is connected to the third end of the boost inverter circuit, and a second end of the short-circuit protection circuit is connected to the positive output end of the energy storage battery of the energy storage system.

8. The device of any one of claims 1-7, wherein, The short-circuit protection circuit is used to cut off the connection between the charging activation device and the energy storage system when a short-circuit fault occurs in the internal circuit of the charging activation device. The device further comprises a power management module, which is connected in parallel between the positive electrode and the negative electrode of the backup battery pack, and the power management module is used to convert the output voltage of the backup battery pack into a working voltage required by the microcontroller unit.

9. The apparatus of claim 1, wherein, It comprises:

10. An energy storage system characterized by, an energy storage battery used to store energy; a battery management system connected in parallel between the energy storage battery, the battery management system being used to monitor the battery state of the energy storage battery; the charging activation device of any one of claims 1-9, the charging activation device being connected in parallel between the energy storage battery. The method comprises:

11. An activation method of an energy storage system, applied to the charging activation device of any one of claims 1-9, characterized in that, ​ Collecting an output voltage of an energy storage battery of the energy storage system and a communication state of an energy storage converter of the energy storage system; According to the output voltage of the energy storage battery and the communication state of the energy storage converter, determining whether the energy storage system is in a lock state; When it is determined that the energy storage system is in the lock state, controlling to start a boost inverter circuit of the charging activation device to raise an input voltage of the boost inverter circuit to an activation voltage threshold of a battery management system of the energy storage system and output, so that the battery management system restores a charge-discharge loop.

12. The method of claim 11, wherein, The method further comprises: When the energy storage system is in a normal working state, the charging activation device maintains a dormant state, and collects the output voltage of the energy storage battery of the energy storage system and the communication state of the energy storage converter of the energy storage system every interval of a preset time length to detect whether the energy storage system is in the lock state.

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