Wake-up device, wake-up control method and energy storage device

Abstract

The application discloses a wake-up device, a wake-up control method and an energy storage device. The energy storage device comprises a battery module and a master control unit, and the wake-up device comprises a state monitoring circuit, a comparison wake-up circuit and a power management circuit. The state monitoring circuit is connected to the battery module and is configured to monitor the voltage and temperature of the battery module; the comparison wake-up circuit is connected to the state monitoring circuit and is configured to generate a wake-up trigger signal when the battery module is in overvoltage or overtemperature and non-under-voltage; and the power management circuit is connected to the comparison wake-up circuit, the battery module and the master control unit and is configured to be activated when the wake-up trigger signal is received, so that the battery module supplies power to the master control unit through the power management circuit. In this way, in the shutdown state of the energy storage device, the abnormal state of the battery module can be monitored in real time, and the master control unit can be automatically woken up when the battery module is in overvoltage or overtemperature, while repeated wake-up can be avoided when the battery module is in under-voltage, so that the safety protection and intelligent management of the device are realized with low power consumption.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, and in particular to a wake-up device, a wake-up control method, and an energy storage device. Background Technology

[0002] To achieve long-term standby and low-power operation of portable energy storage devices, power on / off and deep sleep functions can be added to the devices. However, when the device is in a powered-off or deep sleep state, the entire device cannot sense its own status, and abnormal problems cannot be detected in time, thus posing a safety hazard.

[0003] In related technologies, device status can be intermittently detected through timed or sleep wake-up methods. Since the triggering of device abnormalities is random and uncertain, in order to ensure detection coverage, the device needs to be woken up periodically for detection. On the one hand, it is difficult to balance low power consumption and real-time detection; on the other hand, timed wake-up cannot guarantee timely alarms and status recording when abnormalities occur, which can easily lead to alarm delays or missed status recordings, affecting device security and user experience. Summary of the Invention

[0004] This application aims to at least solve one of the technical problems existing in the related art. To this end, this application provides a wake-up device, a wake-up control method, and an energy storage device.

[0005] This application discloses a wake-up device for an energy storage device, the energy storage device including a battery module and a main control unit, the wake-up device comprising: A condition monitoring circuit, connected to the battery module, is configured to monitor the voltage and temperature of the battery module; The comparison wake-up circuit, connected to the state monitoring circuit, is configured to generate a wake-up trigger signal when the battery module is under overvoltage or undertemperature but not undervoltage. A power management circuit, connected to the comparison wake-up circuit, the battery module, and the main control unit, is configured to activate upon receiving the wake-up trigger signal, so that the battery module supplies power to the main control unit through the power management circuit.

[0006] In some embodiments, the comparison wake-up circuit is further configured to generate a shielding signal when the battery module is undervoltage, and the power management circuit is further configured to stop supplying power to the main control unit based on the shielding signal.

[0007] In some embodiments, the state monitoring circuit includes: A battery protection chip, connected to the battery module, is configured to monitor the individual cell voltage of each cell in the battery module, and output an overvoltage signal when the individual cell voltage is greater than a first threshold voltage, and output an undervoltage signal when the individual cell voltage is less than a second threshold voltage. A temperature detection unit is used to detect the temperature of the battery module and output an over-temperature signal when the temperature of the battery module exceeds a threshold.

[0008] In some embodiments, the comparison wake-up circuit includes: A first comparator, wherein the first input terminal of the first comparator is connected to the battery protection chip, the second input terminal is connected to the temperature detection unit, and the output terminal is used to output a first signal when an overvoltage signal and / or the overtemperature signal is received; The second comparator has its first input terminal connected to the reference voltage terminal, its second input terminal connected to the output terminal of the first comparator and the battery protection chip, and its output terminal connected to the power management circuit. It is used to output a wake-up trigger signal when the first signal is received, and to output a shielding signal when an undervoltage signal is received.

[0009] In some embodiments, the power management circuit is also communicatively connected to the main control unit and is configured to maintain the power supply to the main control unit upon receiving a power supply maintenance signal from the main control unit.

[0010] This application also proposes an energy storage device, including a battery module, a main control unit, and a wake-up device as described in any of the above embodiments.

[0011] This application also proposes a wake-up control method for the energy storage device proposed in the above embodiments, the method comprising: When the energy storage device is in the off state, the voltage and temperature of the battery module are monitored in real time; The state of the battery module is determined based on its voltage and temperature. When the battery module is under overvoltage or under temperature but not undervoltage, a wake-up trigger signal is generated. Based on the wake-up trigger signal, the power management circuit is activated so that the battery module supplies power to the main control unit through the power management circuit.

[0012] In some embodiments, the method further includes: When the battery module is undervoltage, a shielding signal is generated to control the power management circuit to stop supplying power to the main control unit.

[0013] In some embodiments, determining the state of the battery module based on its voltage and temperature includes: The system monitors the individual cell voltage of each cell in the battery module and outputs an overvoltage signal when the individual cell voltage exceeds a first threshold voltage; and outputs an undervoltage signal when the individual cell voltage is below a second threshold voltage. The temperature of the battery module is detected, and an over-temperature signal is output when the temperature of the battery module exceeds a threshold.

[0014] In some embodiments, generating a wake-up trigger signal when the battery module is under overvoltage or undertemperature conditions but not undervoltage includes: Upon receiving the overpressure signal and / or the overtemperature signal, a first signal is output; If the first signal is received but the undervoltage signal is not received, the wake-up trigger signal is output; Upon receiving the undervoltage signal, a shielding signal is output.

[0015] In some embodiments, the method further includes: After the main control unit is activated, a power supply maintenance signal is output to the power management circuit to maintain the power supply of the main control unit by the power management circuit after the wake-up trigger signal is removed.

[0016] In some embodiments, the method further includes: The energy storage device is controlled to enter a low-power self-test mode to diagnose the status of the battery module; Based on the diagnostic results, the energy storage device is controlled to switch to the corresponding operating state.

[0017] In some implementations, controlling the energy storage device to enter a low-power self-test mode to diagnose the state of the battery module includes: Obtain the current voltage and temperature data of the battery module; Based on the current voltage data and the current temperature data, confirm whether the battery module is in an abnormal state.

[0018] In some implementations, controlling the energy storage device to perform corresponding state transition operations based on the diagnosis results includes: If it is confirmed that the battery module is in an abnormal state, the energy storage device is controlled to switch to full power operation mode and alarm and protection operations are performed. The alarm and protection operations include local alarm through the sound and light module and / or pushing alarm information to external terminals through the communication module. If it is confirmed that the battery module is not in an abnormal state, the main control unit is controlled to output a shutdown command to cut off the power supply to the power management circuit.

[0019] The wake-up device, wake-up control method, and energy storage device proposed in this application monitor the voltage and temperature of the battery module in real time through a state monitoring circuit. When the battery module is under overvoltage or overtemperature but not undervoltage, a wake-up trigger signal is generated to activate the power management circuit and supply power to the main control unit. Thus, on the one hand, even when the energy storage device is powered off, it can handle abnormal states such as overvoltage and overtemperature in real time and promptly wake up the main control unit for processing, effectively eliminating safety hazards. On the other hand, in an undervoltage state, it can actively prevent the generation of the wake-up trigger signal, avoiding repeated wake-ups of the main control unit that could lead to battery over-discharge damage and ensuring battery lifespan. Furthermore, the wake-up circuit has extremely low power consumption, essentially having no impact on the overall standby time. It achieves intelligent safety protection in a powered-off state with minimal hardware logic, significantly improving device safety and user experience.

[0020] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0021] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein: Figure 1 This is a flowchart illustrating the wake-up control method according to certain embodiments of this application; Figure 2 This is a schematic diagram of a wake-up device according to certain embodiments of this application; Figures 3-9 This is a flowchart illustrating the wake-up control method according to certain embodiments of this application; Figure 10 This is a schematic diagram of the wake-up logic in some embodiments of this application; Figure 11 This is an overall architecture diagram of an energy storage device according to certain embodiments of this application.

[0022] Explanation of icon numbers Energy storage device 1000, wake-up device 100, status monitoring circuit 10, battery protection chip 11, temperature detection unit 12, comparison wake-up circuit 20, first comparator 21, second comparator 22, power management circuit 30, battery module 200, main control unit 300. Detailed Implementation

[0023] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0024] Please see Figure 1 This application proposes a wake-up control method for an energy storage device, which includes a battery module and a main control unit. The method includes: 01. Real-time monitoring of battery module voltage and temperature when energy storage equipment is powered off; 02. Determine the status of the battery module based on its voltage and temperature; 03. When the battery module is under overvoltage or overtemperature but not undervoltage, a wake-up trigger signal is generated. 04. Based on the wake-up trigger signal, activate the power management circuit so that the battery module can be powered by the main control unit through the power management circuit.

[0025] Please see Figure 2 This application proposes a wake-up device 100 for an energy storage device 1000, the energy storage device 1000 including a battery module 200 and a main control unit 300, and the wake-up device 100 including a state monitoring circuit 10, a comparison wake-up circuit 20 and a power management circuit 30.

[0026] Steps 01 and 02 can be implemented by the state monitoring circuit 10, step 03 can be implemented by the comparison wake-up circuit 20, and step 04 can be implemented by the power management circuit 30.

[0027] Alternatively, the state monitoring circuit 10 can be used to detect the voltage and temperature of the battery module 200 in real time when the energy storage device 1000 is in the off state; the state of the battery module 200 can be determined based on the voltage and temperature of the battery module 200; the comparison wake-up circuit 20 can be used to generate a wake-up trigger signal when the battery module 200 is in an overvoltage or overtemperature state but not undervoltage state; the power management circuit 30 can be activated based on the wake-up trigger signal so that the battery module 200 is powered by the power management circuit 30 to the main control unit 300.

[0028] In the wake-up device 100 and wake-up control method of this application embodiment, the state monitoring circuit 10 monitors the voltage and temperature of the battery module 200 in real time when the energy storage device 1000 is powered off. The comparison wake-up circuit 20 generates a wake-up trigger signal to activate the power management circuit 30 to supply power to the main control unit 300 when there is overvoltage or overtemperature but not undervoltage. This solution achieves real-time anomaly detection and automatic wake-up in the power-off state, solving the problems in related technologies where anomalies cannot be detected or timely alarms cannot be issued when the energy storage device 1000 is powered off. It improves the safety protection level of the energy storage device 1000 and the user experience while ensuring extremely low standby power consumption.

[0029] It is worth noting that the energy storage device 1000 refers to a portable power supply device with energy storage function, such as a portable energy storage power supply or an outdoor power supply. The energy storage device 1000 includes a battery module 200 and a main control unit 300. The battery module 200 is a rechargeable battery pack composed of multiple battery cells connected in series or parallel, used to store and release electrical energy. The main control unit 300 refers to the main controller in the energy storage device 1000, which may or may not be a microcontroller unit (MCU). The main control unit 300 is used to perform functions such as status diagnosis, alarm control, and communication interaction of the energy storage device 1000.

[0030] The wake-up device 100 is a hardware circuit module installed in the energy storage device 1000. It is used to monitor the status of the battery module 200 in real time and determine whether to wake up the main control unit 300 when the energy storage device 1000 is in a powered-off or deep sleep state. The status monitoring circuit 10 is connected to the battery module 200 and can collect the voltage and temperature parameters of the battery module 200 in real time. The voltage parameter refers to the individual cell voltage in the battery module 200, and the temperature parameter refers to the surface temperature of the battery cells in the battery module 200. The voltage and temperature parameters of the battery module 200 obtained by the status monitoring circuit 10 are output to the comparison wake-up circuit 20, which displays the voltage and temperature status of the battery module 200.

[0031] The comparison wake-up circuit 20 is connected to the state monitoring circuit 10 and is used to logically judge the voltage and temperature states of the battery module 200 output by the state monitoring circuit 10. The function of the comparison wake-up circuit 20 is to decide whether to generate a wake-up trigger signal based on the state of the battery module 200. The power management circuit 30 refers to the power management chip or circuit that provides operating voltage to each functional module in the energy storage device 1000, and usually has an enable (EN) control terminal. The power management circuit 30 is connected to the comparison wake-up circuit 20, the battery module 200, and the main control unit 300. After receiving the wake-up trigger signal output by the comparison wake-up circuit 20, the power management circuit 30 is activated, converting the electrical energy of the battery module 200 into an operating voltage suitable for the main control unit 300 and supplying it with power, thereby enabling the main control unit 300 to enter the working state from the shutdown or sleep state.

[0032] In one embodiment, the energy storage device 1000 is a portable energy storage power supply, the battery module 200 uses lithium iron phosphate cells with a rated voltage of 3.2V, and the main control unit 300 is an STM32 series MCU.

[0033] When the energy storage device 1000 is in the off state, the main control unit 300 is completely powered off, the power management circuit 30 is in the off state, and only the status monitoring circuit 10 and the comparison wake-up circuit 20 are continuously powered by the battery module 200 with low power consumption.

[0034] The status monitoring circuit 10 monitors the voltage of each cell in the battery module 200 and the temperature of the battery module 200 in real time. When the voltage of a cell in the battery module 200 rises above 3.65V, exceeding the rated voltage of the lithium iron phosphate cell, the status monitoring circuit 10 transmits this overvoltage status information to the comparison wake-up circuit 20. The comparison wake-up circuit 20 determines that the battery module 200 is in an overvoltage state, generates a wake-up trigger signal, and outputs the signal to the enable pin of the power management circuit 30.

[0035] The power management circuit 30 is activated immediately after receiving a high-level valid wake-up trigger signal on the enable pin, and converts the DC voltage of the battery module 200 into a stable 3.3V voltage and outputs it to the main control unit 300, thereby waking up the main control unit 300 and supplying it with power.

[0036] In another embodiment, when each cell of the battery module 200 is in a non-undervoltage state, the temperature of the battery module 200 rises above 65°C due to the energy storage device 1000 being stored in a high-temperature environment for a long time. That is, when the battery module 200 is in an over-temperature state, the state monitoring circuit 10 transmits this over-temperature state information to the comparison wake-up circuit 20. The comparison wake-up circuit 20 determines that the battery module 200 is in an over-temperature state but not in an undervoltage state, satisfying the condition of being in an over-temperature but not undervoltage state. Therefore, it generates a wake-up trigger signal and outputs this signal to the enable pin of the power management circuit 30, activating the power management circuit 30. The power management circuit 30 converts the DC voltage of the battery module 200 into a stable 3.3V voltage and outputs it to the main control unit 300, thereby waking up the main control unit 300 and supplying it with power.

[0037] In this way, by monitoring the status of the battery module 200 in real time when the energy storage device 1000 is powered off, and waking up the main control unit 300 when preset conditions are met, timely response to abnormal states is achieved with extremely low power consumption, thereby improving the safety and user experience of the energy storage device 1000.

[0038] Please see Figure 3 In some implementations, the method further includes: 001. When the battery module 200 is undervoltage, a shielding signal is generated to control the power management circuit 30 to stop supplying power to the main control unit 300.

[0039] Please combine further Figure 2 In some implementations, step 001 can be implemented by the comparison wake-up circuit 20, or the comparison wake-up circuit 20 is further configured to generate a shielding signal when the battery module 200 is undervoltage, and the power management circuit 30 is further configured to stop supplying power to the main control unit 300 according to the shielding signal.

[0040] It is worth noting that the shielding signal is a control signal generated by the comparison wake-up circuit 20 after receiving the undervoltage status information output by the status monitoring circuit 10, used to prevent the power management circuit 30 from activating. The undervoltage status means that the status monitoring circuit 10 detects that the voltage of any cell in the battery module 200 is lower than a preset undervoltage protection threshold. When the battery module 200 is in an undervoltage state, it means that the battery power is extremely low. At this time, priority should be given to ensuring the battery's storage life and avoiding any unnecessary power consumption. The generation of the shielding signal prevents the power management circuit 30 from being activated, thereby preventing the main control unit 300 from being woken up.

[0041] In one embodiment, when the voltage of a cell in the battery module 200 drops below the undervoltage protection threshold of 1.8V for lithium iron phosphate cells due to prolonged non-charging of the energy storage device 1000, the state monitoring circuit 10 detects the undervoltage state and transmits the state to the comparison wake-up circuit 20.

[0042] After receiving the undervoltage status information, the comparison wake-up circuit 20 determines that the battery module 200 is currently in an undervoltage state and does not generate a wake-up trigger signal. At the same time, the comparison wake-up circuit 20 generates a shielding signal and outputs the shielding signal to the enable pin of the power management circuit 30.

[0043] After receiving the shielding signal, the enable pin of the power management circuit 30 is kept in a low-level invalid state, and the power management circuit 30 remains off, not supplying power to the main control unit 300. At this time, even if the temperature of the battery module 200 rises above the temperature protection threshold, the wake-up trigger signal cannot be generated due to the presence of the shielding signal, and the main control unit 300 will not be woken up.

[0044] In this way, by actively preventing the activation of the power management circuit 30 through signal shielding, the main control unit 300 is not repeatedly woken up due to temperature fluctuations and voltage transients, which prevents further consumption of battery power under undervoltage conditions, prioritizes the long-term storage capability of the battery module 200 under low voltage conditions, and significantly improves the safety of the energy storage device 1000 and the battery life.

[0045] Please see Figure 4 In some implementations, step 02 includes: 021, monitor the individual cell voltage of each cell in the battery module 200, and output an overvoltage signal when an individual cell voltage is greater than a first threshold voltage; and output an undervoltage signal when an individual cell voltage is less than a second threshold voltage. 022, detect the temperature of battery module 200, and output an over-temperature signal when the temperature of battery module 200 exceeds the threshold.

[0046] Please combine further Figure 2 In some embodiments, the state monitoring circuit 10 includes a battery protection chip 11 and a temperature detection unit 12. Step 021 can be implemented by the battery protection chip 11, and step 022 can be implemented by the temperature detection unit 12. Alternatively, the battery protection chip 11 can monitor the individual cell voltage of each cell in the battery module 200, and output an overvoltage signal when an individual cell voltage exceeds a first threshold voltage, and output an undervoltage signal when an individual cell voltage is below a second threshold voltage. The temperature detection unit 12 can detect the temperature of the battery module 200 and output an overtemperature signal when the temperature of the battery module 200 exceeds a threshold.

[0047] It is worth noting that the battery protection chip 11 is connected to the battery module 200 and collects the voltage value of each cell in the battery module 200 in real time, comparing the collected voltage value with a preset first threshold voltage. The first threshold voltage is an overvoltage protection threshold, which can be set according to the cell type; for example, it can be set to 3.65V for lithium iron phosphate cells and 4.25V for ternary lithium cells. The second threshold is an undervoltage protection threshold, and its specific value can be set according to the cell type; for example, it can be set to 1.8V for lithium iron phosphate cells and 2.8V for ternary lithium cells. When the voltage of any cell in the battery module 200 exceeds the first threshold, the battery protection chip 11 can output an overvoltage signal through its overvoltage output pin COUT; when the voltage of any cell is lower than the second threshold, the battery protection chip 11 can output an undervoltage signal through its undervoltage output pin DOUT.

[0048] The temperature detection unit 12 is used to collect temperature parameters of the battery module 200, including but not limited to using a negative temperature coefficient thermistor (NTC). The resistance of an NTC decreases as the temperature increases. The temperature detection unit 12 can be positioned close to the battery module 200. When the detected temperature exceeds a preset safe temperature threshold, an over-temperature signal is output. The specific value of the safe temperature threshold can be set according to the type of battery cell; for example, it can be set to 65°C for lithium iron phosphate cells and 60°C for ternary lithium cells.

[0049] In one embodiment, the energy storage device 1000 is a portable energy storage power supply, the battery module 200 uses lithium iron phosphate cells, the first threshold is set to 3.65V, the second threshold is set to 1.8V, and the safe temperature threshold is set to 65℃.

[0050] The status monitoring circuit 10 includes a battery protection chip 11 and a temperature detection unit 12. The battery protection chip 11 is a lithium battery protection chip of model BM3451, and its input terminals are connected to the positive and negative terminals of each cell in the battery module 200 to collect the voltage value of each cell in real time.

[0051] When the voltage of a cell in the battery module 200 rises above 3.65V, the battery protection chip 11 outputs an overvoltage signal from its overvoltage output pin COUT to the comparison wake-up circuit 20.

[0052] When the voltage of a cell in the battery module 200 drops below 1.8V, the battery protection chip 11 outputs an undervoltage signal from its undervoltage output pin DOUT to the comparison wake-up circuit 20.

[0053] The temperature detection unit 12 uses a negative temperature coefficient thermistor, which is placed in close contact with the surface of the battery cell inside the battery module 200. The resistance of the NTC decreases as the temperature rises, and the temperature value can be converted by measuring its voltage drop. When the temperature of the battery cell inside the battery module 200 rises above 65°C, the temperature detection unit 12 outputs an over-temperature signal to the comparison wake-up circuit 20.

[0054] Thus, by collecting the voltage and temperature of the battery module 200 in real time through the battery protection chip 11 and the temperature detection unit 12, the state monitoring circuit 10 can accurately identify the state of the cells inside the battery module 200, effectively avoiding misjudgments. At the same time, the overall power consumption of the state monitoring circuit 10 is much less than the self-discharge loss of the cells, and it can continue to work in the power-off state without significantly affecting the standby time, thereby ensuring the safety and reliability of the energy storage device 1000 while reducing power consumption.

[0055] Please see Figure 5 In some implementations, step 03 includes: 031, Upon receiving an overvoltage signal and / or an overtemperature signal, output the first signal; 032, if the first signal is received but the undervoltage signal is not received, output a wake-up trigger signal; 033, when receiving an undervoltage signal, outputs a shielding signal.

[0056] Please combine further Figure 2 In some embodiments, the comparison wake-up circuit 20 includes a first comparator 21 and a second comparator 22. The first input terminal of the first comparator 21 is connected to the battery protection chip 11, and the second input terminal is connected to the temperature detection unit 12. The first input terminal of the second comparator 22 is connected to the reference voltage terminal, the second input terminal is connected to the output terminal of the first comparator 21 and the battery protection chip 11, and the output terminal is connected to the power management circuit 30.

[0057] Step 031 can be implemented by the first comparator 21, and steps 032 and 033 can be implemented by the second comparator 22. Alternatively, the first comparator 21 is used to output a first signal when an overvoltage signal and / or an overtemperature signal is received; the second comparator 22 is used to output a wake-up trigger signal when the first signal is received, and to output a shielding signal when an undervoltage signal is received.

[0058] It is worth noting that the first comparator 21 refers to an analog circuit element used to compare two input voltages and output a logic level. The first input terminal of the first comparator 21 is connected to the battery protection chip 11 to receive an overvoltage signal, and the second input terminal is connected to the temperature detection unit 12 to receive an overtemperature signal. When the first comparator 21 receives an overvoltage signal and / or an overtemperature signal, its output terminal outputs a first signal.

[0059] The second comparator 22 and the first comparator 21 are the same components. The first input terminal of the second comparator 22 is connected to the reference voltage terminal to receive the reference voltage. The second input terminal is connected to the output terminal of the first comparator 21 and the undervoltage output pin DOUT of the battery protection chip 11. The output terminal of the second comparator 22 is connected to the control terminal of the power management circuit 30. When the second comparator 22 receives the first signal output by the first comparator 21, it outputs a wake-up trigger signal. When the second comparator 22 receives the undervoltage signal output by the battery protection chip 11, it outputs a shielding signal.

[0060] The reference voltage terminal refers to the circuit node that provides a stable reference voltage, which is usually generated by a voltage divider network, such as a resistor voltage divider circuit. It is used to compare with the first signal output by the first comparator 21 to determine whether the wake-up condition is met.

[0061] In one embodiment, when the battery module 200 experiences overvoltage, the battery protection chip 11 outputs an overvoltage signal to the first input terminal of the first comparator 21 via the COUT pin. Upon receiving the overvoltage signal, the first comparator 21 outputs a first signal.

[0062] After receiving the first signal output by the first comparator 21, the voltage at the second input terminal of the second comparator 22 is higher than the reference voltage at the first input terminal of the second comparator 22. The second comparator 22 outputs a high level as a wake-up trigger signal to the enable pin of the power management circuit 30 to activate the power circuit 30.

[0063] In another embodiment, when the battery module 200 experiences overheating but is not undervoltage, the temperature detection unit 12 outputs an overheat signal to the second input terminal of the first comparator 21. After receiving the overheat signal, the first comparator 21 outputs a first signal.

[0064] After the second input terminal of the second comparator 22 receives the first signal output by the first comparator 21, since the battery module 200 is not in an undervoltage state, the DOUT pin of the battery protection chip 11 outputs a high level, which will not pull down the voltage of the second input terminal of the second comparator 22. At this time, the voltage of the second input terminal of the second comparator 22 is higher than the reference voltage of its first input terminal. The second comparator 22 outputs a high level as a wake-up trigger signal to the enable pin of the power management circuit 30, thereby activating the power management circuit 30.

[0065] In another embodiment, when the battery module 200 overheats but is simultaneously undervoltage, the temperature detection unit 12 outputs an overheat signal to the second input terminal of the first comparator 21, and the first comparator 21 outputs a first signal after receiving the overheat signal.

[0066] However, since the battery module 200 is in an undervoltage state, the battery protection chip 11 outputs a low-level undervoltage signal through the DOUT pin. This low-level signal is directly connected to the second input terminal of the second comparator 22, pulling the voltage at the second input terminal down to a low level. At this time, even if the first comparator 21 outputs the first signal, the voltage at the second input terminal of the second comparator 22 is still lower than the reference voltage at its first input terminal, and the second comparator 22 outputs a shielding signal, failing to generate a wake-up trigger signal.

[0067] Thus, through the cascaded design of the first comparator 21 and the second comparator 22, the comparator wake-up circuit 20 realizes wake-up by overvoltage / overtemperature signals and shields the wake-up trigger signal by undervoltage signals. This circuit has a simple structure, requires no software intervention, has a fast response speed and extremely low power consumption, and can continue to work in the power-off state without affecting standby time, further improving the safety of the energy storage device 1000 and its battery life.

[0068] Please see Figure 6 In some implementations, the method further includes: 05. After the main control unit 300 is activated, a power supply maintenance signal is output to the power management circuit 30 to maintain the power supply of the main control unit 300 by the power management circuit 30 after the wake-up trigger signal is removed.

[0069] Please combine further Figure 2 In some embodiments, the power management circuit 30 is also communicatively connected to the main control unit 300, and step 05 can be implemented by the main control unit 300. Alternatively, the main control unit 300 can output a power supply maintenance signal to the power management circuit 30 after being activated, so as to maintain the power supply of the power management circuit 30 to the main control unit 300 after the wake-up trigger signal is removed.

[0070] It is worth noting that the power supply maintenance signal is a control signal actively output by the main control unit 300 to the power management circuit 30 after it is woken up and powered on. This signal is used to maintain the continuous power supply from the power management circuit 30 to the main control unit 300 after the wake-up trigger signal is removed, so as to ensure that the main control unit 300 can fully perform subsequent operations such as re-diagnosis of the battery module 200, status judgment and alarm handling, and avoid the situation where the main control unit 300 loses power immediately after being powered on due to the short pulse of the wake-up trigger signal.

[0071] In one embodiment, when the battery module 200 experiences overvoltage or overtemperature but not undervoltage, the comparison wake-up circuit 20 generates a wake-up trigger signal and outputs it to the enable pin of the power management circuit 30. The power management circuit 30 is activated, converting the DC voltage of the battery module 200 into the operating voltage required by the main control unit 300, thus powering the main control unit 300.

[0072] After the main control unit 300 is powered on, a power supply sustaining signal is output from the general-purpose pin of the main control unit 300 to the enable pin of the power management circuit 30. At this time, even if the wake-up trigger signal output by the comparison wake-up circuit 20 is removed due to the disappearance of the overvoltage or overtemperature condition, the enable pin of the power management circuit 30 remains at a high level because the power supply sustaining signal is still valid, and the power management circuit 30 continues to supply power to the main control unit 300.

[0073] After completing secondary diagnosis and necessary alarm processing, if the main control unit 300 determines that it does not need to continue working, such as when the abnormal state has been recovered or the user has handled the issue, it will actively cancel the power supply maintenance signal. The enable pin of the power management circuit 30 will then go low, the power management circuit 30 will be turned off, the main control unit 300 will be powered off, and the energy storage device 1000 will return to the shutdown state.

[0074] Thus, by outputting a power supply sustaining signal from the main control unit 300, the power management circuit 30 continues to supply power to the main control unit 300 even after the wake-up trigger signal is removed. This mechanism ensures that the main control unit 300 has sufficient power supply time to complete subsequent diagnostic and processing procedures.

[0075] Please see Figure 7 In some implementations, the method further includes: 06. Control the energy storage device 1000 to enter the low power self-test mode to diagnose the status of the battery module 200; 07. Based on the diagnostic results, control the energy storage device 1000 to switch to the corresponding operating state.

[0076] It is worth noting that the low-power self-test mode refers to a working mode in which the main control unit 300 operates with lower power consumption after being woken up. In this mode, the main control unit 300 diagnoses the status of the battery module 200. Diagnosis refers to the main control unit 300 judging the status of the battery module 200 to confirm its condition. The corresponding operating status refers to the subsequent operations controlled by the main control unit 300 to control the energy storage device 1000 based on the diagnostic results.

[0077] In one embodiment, the energy storage device 1000 is a portable energy storage power supply, and the battery module 200 uses lithium iron phosphate cells. When the main control unit 300 is woken up, it immediately enters a low-power self-test mode. In this mode, the main control unit 300 diagnoses the state of the battery module 200 with low power consumption, thus obtaining the status of the battery module 200. After the diagnosis is completed, the main control unit 300 controls the energy storage device 1000 to switch to the corresponding operating state based on the diagnostic results.

[0078] In this way, by having the main control unit 300 enter a low-power self-test mode to diagnose the status of the battery module 200, false alarms caused by momentary erroneous triggering of the hardware comparator are avoided, the accuracy of wake-up decisions is improved, and power consumption interference caused by erroneous triggering is reduced.

[0079] Please see Figure 8 In some implementations, step 06 includes: 061, Obtain the current voltage and temperature data of battery module 200; 062. Based on the current voltage and temperature data, confirm whether the battery module 200 is in an abnormal state.

[0080] It is worth noting that the current voltage data refers to the individual cell voltage value of each battery cell in the battery module 200, which is re-acquired by the main control unit 300 through interfaces such as digital-to-analog converters. The current temperature data refers to the temperature value of each battery cell in the battery module 200, which is re-acquired by the main control unit 300 through interfaces such as digital-to-analog converters. The purpose of obtaining the current voltage and temperature data is to compare and verify these two data with the results monitored by the hardware circuit to confirm whether the battery module 200 is in an abnormal state.

[0081] In one embodiment, after the main control unit 300 is woken up, it enters a low-power self-test mode, turns off the display backlight and inverter output module, and only turns on the digital-to-analog converter interface for status acquisition. The main control unit 300 reads the voltage and temperature values ​​of each cell in the battery module 200 through the digital-to-analog converter interface to obtain the current voltage and temperature data.

[0082] Next, the main control unit 300 compares the collected voltage value with the preset overvoltage threshold of 3.65V and undervoltage threshold of 1.8V, and compares the temperature value with the preset safe temperature threshold of 65℃. If the voltage value is consistently higher than 3.65V or the temperature value is consistently higher than 65℃ and the battery module 200 is not in an undervoltage state, it is confirmed as an anomaly; if it is only a momentary fluctuation and the current value has returned to normal, it is confirmed as a false trigger.

[0083] In this way, by actively collecting data in low-power mode, the triggering results of the hardware circuit can be verified, which can effectively distinguish between abnormalities or momentary interference, significantly improve the accuracy of wake-up decisions, and avoid false alarms and invalid wake-ups.

[0084] Please see Figure 9 In some implementations, step 07 includes: 071. If it is confirmed that the battery module 200 is in an abnormal state, control the energy storage device 1000 to switch to full power operation mode and execute alarm and protection operations. The alarm and protection operations include local alarm through the sound and light module and / or push alarm information to external terminals through the communication module. 072. If it is confirmed that the battery module 200 is not in an abnormal state, the main control unit 300 outputs a shutdown command to cut off the power supply to the power management circuit 30.

[0085] It's worth noting that the full-power operation mode refers to the mode in which all functional modules of the energy storage device 1000 operate normally, as opposed to the low-power self-test mode. In this mode, the device can perform full functions such as alarms and communication. Alarm and protection operations refer to the actions taken by the energy storage device 1000 to warn the user and take protective measures when the battery module 200 is confirmed to be in an abnormal state. Local alarms refer to alerts issued through the device's own audio-visual elements, such as buzzers and LED indicator lights. The communication module refers to the module used by the energy storage device 1000 for wireless communication with external terminals, such as mobile phones and tablets. Communication modules include, but are not limited to, Bluetooth modules, WiFi modules, or 4G modules.

[0086] In one embodiment, see Figure 10 The energy storage device 1000 is a portable energy storage power supply. When the main control unit 300 confirms that the battery module 200 is in an over-temperature but not under-voltage or over-voltage state, the main control unit 300 switches the device from low-power self-test mode to full-power operation mode and turns on the display screen, communication module and other functional modules.

[0087] Then, the main control unit 300 controls the sound and light module to emit a buzzer and flash red light for local alarm, and at the same time pushes alarm information to the bound mobile APP through the Bluetooth module to inform the user that the battery is overvoltage and to deal with it in time.

[0088] In another embodiment, the wake-up device 100 is triggered by a momentary voltage fluctuation, but after a second data acquisition, the main control unit 300 finds that both the voltage and temperature have returned to normal, confirming that the battery module 200 is not in an abnormal state. At this time, the main control unit 300 outputs a shutdown command to the control terminal of the power management circuit 30, the power management circuit 30 shuts down its output, and the main control unit 300 itself is powered off. Subsequently, the wake-up device 100 continues to monitor the status of the battery module 200 in low-power mode, waiting for the next trigger.

[0089] Thus, when a fault is confirmed in battery module 200, energy storage device 1000 switches to full-power mode and issues alarms through multiple channels, including audible and visual alerts and app push notifications, ensuring users are promptly informed and can address the issue, effectively preventing safety accidents. If a false trigger is confirmed, the power supply to the power management circuit is cut off. This mechanism ensures timely response in abnormal situations while avoiding resource waste from false triggers, improving device safety and user experience.

[0090] Please see Figure 11 This application also proposes an energy storage device 1000, including a battery module 200, a main control unit 300, and a wake-up device 100 as described in the above embodiments.

[0091] Thus, by integrating a wake-up device 100 into the energy storage device 1000, the energy storage device 1000 can monitor the abnormal state of the battery module 200 in real time and determine whether to wake up the main control unit 300 in the power-off or sleep state. This achieves safe monitoring and intelligent response of the energy storage device 1000 in the power-off or sleep state with extremely low power consumption, thereby improving the safety of the device and the user experience.

[0092] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A wake-up device for an energy storage device, characterized in that, The energy storage device includes a battery module and a main control unit, and the wake-up device includes: A condition monitoring circuit, connected to the battery module, is configured to monitor the voltage and temperature of the battery module; The comparison wake-up circuit, connected to the state monitoring circuit, is configured to generate a wake-up trigger signal when the battery module is under overvoltage or undertemperature but not undervoltage. A power management circuit, connected to the comparison wake-up circuit, the battery module, and the main control unit, is configured to activate upon receiving the wake-up trigger signal, so that the battery module supplies power to the main control unit through the power management circuit.

2. The wake-up device according to claim 1, characterized in that, The comparison wake-up circuit is further configured to generate a shielding signal when the battery module is undervoltage, and the power management circuit is further configured to stop supplying power to the main control unit based on the shielding signal.

3. The wake-up device according to claim 2, characterized in that, The status monitoring circuit includes: A battery protection chip, connected to the battery module, is configured to monitor the individual cell voltage of each cell in the battery module, and output an overvoltage signal when the individual cell voltage is greater than a first threshold voltage, and output an undervoltage signal when the individual cell voltage is less than a second threshold voltage. A temperature detection unit is used to detect the temperature of the battery module and output an over-temperature signal when the temperature of the battery module exceeds a threshold.

4. The wake-up device according to claim 3, characterized in that, The comparison wake-up circuit includes: A first comparator, wherein the first input terminal of the first comparator is connected to the battery protection chip, the second input terminal is connected to the temperature detection unit, and the output terminal is used to output a first signal when an overvoltage signal and / or the overtemperature signal is received; The second comparator has its first input terminal connected to the reference voltage terminal, its second input terminal connected to the output terminal of the first comparator and the battery protection chip, and its output terminal connected to the power management circuit. It is used to output a wake-up trigger signal when the first signal is received, and to output a shielding signal when an undervoltage signal is received.

5. The wake-up device according to claim 1, characterized in that, The power management circuit is also communicatively connected to the main control unit and is configured to maintain the power supply to the main control unit upon receiving a power supply maintenance signal from the main control unit.

6. An energy storage device, characterized in that, It includes a battery module, a main control unit, and a wake-up device as described in any one of claims 1 to 5.

7. A wake-up control method, characterized in that, The method for the energy storage device of claim 6 includes: When the energy storage device is in the off state, the voltage and temperature of the battery module are monitored in real time; The state of the battery module is determined based on its voltage and temperature. When the battery module is under overvoltage or under temperature but not undervoltage, a wake-up trigger signal is generated. Based on the wake-up trigger signal, the power management circuit is activated so that the battery module supplies power to the main control unit through the power management circuit.

8. The wake-up control method according to claim 7, characterized in that, Also includes: When the battery module is undervoltage, a shielding signal is generated to control the power management circuit to stop supplying power to the main control unit.

9. The wake-up control method according to claim 7, characterized in that, The step of determining the state of the battery module based on its voltage and temperature includes: The system monitors the voltage of each cell in the battery module and outputs an overvoltage signal when the voltage of a cell exceeds a first threshold voltage; and outputs an undervoltage signal when the voltage of a cell is below a second threshold voltage. The temperature of the battery module is detected, and an over-temperature signal is output when the temperature of the battery module exceeds a threshold.

10. The wake-up control method according to claim 9, characterized in that, The step of generating a wake-up trigger signal when the battery module is under overvoltage or overtemperature but not undervoltage includes: Upon receiving the overpressure signal and / or the overtemperature signal, a first signal is output; If the first signal is received but the undervoltage signal is not received, the wake-up trigger signal is output; Upon receiving the undervoltage signal, a shielding signal is output.

11. The wake-up control method according to claim 7, characterized in that, Also includes: After the main control unit is activated, a power supply maintenance signal is output to the power management circuit to maintain the power supply of the main control unit by the power management circuit after the wake-up trigger signal is removed.

12. The wake-up control method according to claim 7, characterized in that, Also includes: The energy storage device is controlled to enter a low-power self-test mode to diagnose the status of the battery module; Based on the diagnostic results, the energy storage device is controlled to switch to the corresponding operating state.

13. The wake-up control method according to claim 12, characterized in that, The control of the energy storage device to enter a low-power self-test mode to diagnose the status of the battery module includes: Obtain the current voltage and temperature data of the battery module; Based on the current voltage data and the current temperature data, confirm whether the battery module is in an abnormal state.

14. The wake-up control method according to claim 13, characterized in that, Based on the diagnosis results, controlling the energy storage device to perform corresponding state transition operations includes: If the battery module is confirmed to be in an abnormal state, the energy storage device is controlled to switch to full power operation mode and alarm and protection operations are performed. The alarm and protection operations include local alarm through the sound and light module and / or pushing alarm information to external terminals through the communication module. If it is confirmed that the battery module is not in an abnormal state, the main control unit is controlled to output a shutdown command to cut off the power supply to the power management circuit.

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