Energy Storage Device

Abstract

To provide an energy storage device capable of effectively reducing idle power consumption in a shutdown or standby state and extending storage time. [Solution] The energy storage device includes a battery module, an on / off key electrically connected to the battery module at one end for generating a power-on command when a power-on operation is performed, and an analog front end powered by the battery module and electrically connected to the other end of the on / off key for receiving the power-on command. When the energy storage device needs to be powered on, the analog front end receives the power-on command and powers on the energy storage device. When the energy storage device is in shutdown or standby mode, the power consumption of the battery module only includes the power consumption of the analog front end, which is typically less than 10 microamperes, thereby achieving low power consumption.

Description

[Technical Field]

[0001] The present application relates to the technical field of energy storage, and in particular to energy storage devices. [Background technology]

[0002] Currently, even when an energy storage device is not in use for a long period of time (for example, when the energy storage device enters an operating mode such as hibernation or shutdown), the charge / discharge switch of the energy storage device remains closed to keep the energy storage device's microcontroller unit (MCU) constantly powered.

[0003] Since MCUs consume a lot of power when they are constantly powered on, high power consumption over long periods of time will shorten the service life of the energy storage device. Summary of the Invention [Problem to be solved by the invention]

[0004] The present application aims to solve at least one of the technical problems existing in the prior art by providing an energy storage device that can reduce power consumption when the energy storage device enters an operating mode such as hibernation or shutdown, thereby extending the service life of the energy storage device. [Means for solving the problem]

[0005] The energy storage device according to the present application includes a battery module, an on / off key having one end electrically connected to the battery module and configured to generate a power-on command when a power-on operation is performed, and an analog front end powered by the battery module, electrically connected to the other end of the on / off key, and configured to receive the power-on command.

[0006] In some embodiments, the energy storage device further includes a controller and a power supply module, the power supply module is connected to the battery module, a power supply end of the power supply module is electrically connected to the controller, and an enable end of the power supply module is electrically connected to the analog front end, and when the analog front end receives the power-on command, it sends a power supply enable signal to the enable end, causing the power supply module to supply power to the controller.

[0007] In some embodiments, the analog front end further comprises a voltage regulator for converting a power supply voltage of the battery module to a preset voltage threshold and sending the power supply enable signal to the power supply module based on the preset voltage threshold.

[0008] In some embodiments, the energy storage device further comprises a bus capacitor; and a pre-charge switch assembly connected to the bus capacitor and the battery module, the pre-charge switch assembly being configured to generate a pre-charge command when the controller is powered on, the controller being communicatively connected to the analog front end, the analog front end receiving the pre-charge command and controlling closing of the pre-charge switch assembly to pre-charge the bus capacitor.

[0009] In some embodiments, the energy storage device further includes a charge / discharge switch assembly, and the controller is further used to generate a charge / discharge command when the voltage of the bus capacitor is greater than a preset voltage, and the analog front end receives the charge / discharge command and controls charging or discharging of the charge / discharge switch assembly.

[0010] In some embodiments, the energy storage device further includes a charge / discharge switch assembly, the charge / discharge switch assembly is connected to the analog front end, the on / off key is connected to the controller, and when the on / off key receives a shutdown operation, it generates a shutdown command, the controller receives the shutdown command and controls the analog front end to stop transmitting the power supply enable signal, and controls the analog front end to turn off each switch of the charge / discharge switch assembly.

[0011] In some embodiments, the analog front end stops sending the power supply enable signal and enters a sleep state after each switch of the charge / discharge MOS assembly is turned off.

[0012] In some embodiments, the energy storage device further comprises a charging interface, the charging interface being connected to the power supply module and supplying power to the power supply module.

[0013] In some embodiments, when an external power source is applied to the charging interface, the power supply module supplies power to the controller, and when the controller is powered on, it generates and sends a wake-up command to the analog front end to wake up the analog front end.

[0014] In some embodiments, the analog front end is in a dormant state before receiving the power-on command or the wake-up command.

[0015] The energy storage device according to the present application comprises a battery module, an on / off key, and an analog front end, one end of which is electrically connected to the battery module and generates a power-on command when a power-on operation is performed, and the analog front end is powered by the battery module and electrically connected to the other end of the on / off key and receives the power-on command. When the energy storage device needs to be powered on, the power-on command is received by the analog front end, i.e., the analog front end is woken up, thereby powering on the energy storage device. When the energy storage device is in shutdown or standby mode (the energy storage device is not charging or discharging), the power consumption of the battery module only includes the power consumption of the analog front end, which is typically less than 10 microamperes, thereby realizing low power consumption in the shutdown and standby modes of the energy storage device, which effectively reduces the idle power consumption of the energy storage device in shutdown and standby modes and extends the storage time and service life of the energy storage device.

[0016] In addition, even if the energy storage device has not been used for a long time due to standby power consumption at the microampere level, the State of Charge (SOC) of the energy storage device usually does not change when the power is turned on again, which extends the time that the battery module of the energy storage device enters its low voltage point, thereby avoiding any impact on the life of the energy storage device.

[0017] Additional aspects and advantages of embodiments of the present application will be set forth in part in the description that follows, and in part will be obvious from the description, or may be learned by practice of the present application.

[0018] The above and / or additional aspects and advantages of the present application will become apparent and easier to understand from the following description of the embodiments taken in conjunction with the drawings. [Brief explanation of the drawings]

[0019] [Figure 1] 1 is a principle schematic diagram of an energy storage device according to an embodiment of the present application; DETAILED DESCRIPTION OF THE INVENTION

[0020] Hereinafter, the embodiments of the present application shown in the drawings will be described in detail, and in all the drawings, the same or similar reference numerals indicate the same or similar elements or elements having the same or similar functions. The embodiments described through the following reference drawings are illustrative and are intended to explain the embodiments of the present application, and should not be understood as limitations on the present application.

[0021] In this application, unless otherwise specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact via an intermediate medium. Furthermore, a first feature being "above," "above," and "on the upper surface" of a second feature may mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the horizontal height of the first feature is higher than that of the second feature. A first feature being "below," "below," and "on the lower surface" of a second feature may mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the horizontal height of the first feature is lower than that of the second feature.

[0022] Additionally, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as expressing or implying relative importance or the number of technical features being presented. Thus, a feature qualified by "first" or "second" can explicitly or implicitly include at least one feature. In the description of this application, "plurality" means at least two, e.g., two, three, etc., unless otherwise specified.

[0023] For ease of understanding, the technical background of the present invention and its application scenarios will be first introduced below.

[0024] In related art, to extend the service life of an energy storage device in a standby scenario, the energy storage device is usually set to a sleep mode. In the sleep mode, the energy storage device disconnects some functional modules (e.g., a communication module), but its charge / discharge control module is not disconnected, and the energy storage device (the microcontroller unit (MCU) of the energy storage device) remains constantly powered. If the MCU remains constantly powered, the high power consumption may cause the energy storage device to be over-discharged or damaged, thereby shortening the life of the energy storage device.

[0025] Therefore, currently, an incomplete shutdown hibernation mode is also included, which supplies power only to the Battery Management System (BMS) and periodically supplies power to the MCU. Compared to the above hibernation modes, the incomplete shutdown hibernation mode consumes less power (usually at the milliampere (mA) level).

[0026] However, in the sleep mode, the start-up of the energy storage device needs to be realized based on the power supply circuit of the BMS system, which increases the cost of the BMS and therefore the cost of the energy storage power source.

[0027] In this regard, and with reference to FIG. 1 , the present application provides an energy storage device 100, which includes: a battery module 10; an on / off key 20, one end of which is electrically connected to the battery module 10, and which generates a power-on command in the case of a power-on operation; and an analog front end 30 that is powered by the battery module 10 and electrically connected to the other end of the on / off key 20 to receive a power-on command.

[0028] The battery module 10 can be used to store electrical energy input from an external power source to the energy storage device 100 and to discharge the energy storage device 100. The battery module 10 includes a positive electrode (B+) and a negative electrode (B-).

[0029] Here, the on / off key 20 can be used to control the power-on (and / or shutdown) of the energy storage device 100, and there may be only one on / off key 20, where one switch key controls the power-on and / or shutdown of the energy storage device 100, or the on / off key 20 may include a power-on key and a shutdown key, where the power-on key is used to control the power-on of the energy storage device 100 and the shutdown key is used to control the shutdown of the energy storage device 100, etc.

[0030] The power-on command may include activating energy storage device 100.

[0031] The analog front end 30 (Active Front End, AFE) can be used to convert analog signals into digital signals to achieve data collection and data processing of the energy storage device 100. The analog front end 30 can also be used to monitor the battery module 10 of the energy storage device 100 (e.g., power monitoring).

[0032] The analog front end 30 may be provided in the BMS of the energy storage device 100, and the on / off key 20 may be provided on the motherboard of the energy storage device 100.

[0033] Specifically, the energy storage device 100 includes a battery module 10, an on / off key 20, and an analog front end 30. The on / off key 20 is electrically connected to the battery module 10, and the other end is electrically connected to the analog front end 30. The battery module 10 supplies power to the analog front end 30, and the analog front end 30 is electrically connected to the on / off key 20. When a switch operation is performed (for example, the on / off key 20 receives a power-on operation (for example, the on / off key 20 is pressed, opened, etc.)), a power-on command can be generated and sent to the analog front end 30. The analog front end 30 is activated after receiving the power-on command. For example, the analog front end 30 may include an activation pin, and the on / off key 20 may have one end connected to the battery module 10 and the other end connected to the activation pin of the analog front end 30. The power-on operation may be to pull up (or pull down) the level of the on / off key 20, and the power-on command may be a pull-up (or pull-down) level signal. After the activation pin of the analog front end 30 receives the pulled-up (or pull-down) level signal, the analog front end 30 can be activated. After the analog front end 30 is activated, it can re-control each assembly of the energy storage device 100 to respond to the power-on operation with the support of the electrical energy (i.e., B+, B-) of the battery module 10.

[0034] As such, the energy storage device 100 comprises a battery module 10, an on / off key 20 and an analog front end 30, one end of the on / off key 20 is electrically connected to the battery module and generates a power-on command in the case of a power-on operation, the analog front end 30 is powered by the battery module 10 and the other end of the analog front end 30 is electrically connected to the on / off key 20 and receives the power-on command. When the energy storage device 100 needs to be powered on, the analog front end 30 receives a power-on command, i.e., wakes up the analog front end 30, thereby powering on the energy storage device 100. When the energy storage device 100 is shut down or in standby mode (at this time, the energy storage device 100 is not charging or discharging), the power consumption of the battery module 10 only includes the power supply power consumption of the analog front end 30, which is usually less than 10 microamperes. In this way, low power consumption can be achieved in the shutdown and standby states of the energy storage device 100, which effectively reduces the idle power consumption in the shutdown and standby states of the energy storage device 100 and extends the storage time and service life of the energy storage device 100.

[0035] Furthermore, even if the energy storage device 100 has not been used for a long time due to standby power consumption at the microampere level, the state of charge (SOC) of the energy storage device 100 usually does not change when the power is turned on again, which extends the time during which the battery module 10 of the energy storage device 100 enters its low voltage point, thereby avoiding any impact on the life of the energy storage device 100.

[0036] Furthermore, compared to the case where the sleep mode of the energy storage device 100 is activated based on a power supply circuit equipped with a current BMS system, the present application does not require a separate power supply circuit for the BMS system, thereby reducing production costs.

[0037] Referring to FIG. 1 , in some embodiments, the energy storage device 100 further includes a controller 40 and a power supply module 50, where the power supply module 50 is connected to the battery module 10, the power supply end of the power supply module 50 is electrically connected to the controller 40, and the enable end of the power supply module 50 is electrically connected to the analog front end 30. When the analog front end 30 receives a power-on command, it sends a power supply enable signal to the enable end, causing the power supply module 50 to supply power to the controller 40.

[0038] The controller 40 can be used to send control commands to manage each operation of the energy storage device 100 (e.g., control of charging and discharging of the energy storage device 100). For example, the controller 40 may be a microcontroller unit (MCU), a central processing unit (CPU), or the like.

[0039] The power supply module 50 can be used to power the controller 40 .

[0040] The power enable signal can be used to control the power module 50 to power the controller 40 .

[0041] The controller 40 and the power supply module 50 may be mounted on the motherboard of the energy storage device 100 .

[0042] Optionally, the analog front end 30 The power supply module includes a voltage regulator for converting the power supply voltage of the battery module to a preset voltage threshold and transmitting a power supply enable signal to the power supply module based on the preset voltage threshold.

[0043] The voltage regulator 31 may be a low-dropout regulator (LDO) or the like, and the analog front end 30 can output a voltage of a preset voltage threshold via the voltage regulator 31.

[0044] The preset voltage threshold may be 4 volts (V), 3.5V, 3.3V, 3V, and the like.

[0045] Specifically, the battery module 10 can supply power to the power supply module 50, the power supply end of which is electrically connected to the controller 40, and the enable end of the power supply module 50 is electrically connected to the analog front end 30. After the analog front end 30 receives a power-on command, the analog front end 30 can convert the power supply voltage of the battery module 10 to a preset voltage threshold (e.g., 3.3V) via the voltage regulator 31. The analog front end 30 outputs a 3.3V voltage signal to the power supply module 50 as a power supply enable signal to activate the power supply module 50, which can then supply power to the controller 40 and activate the controller 40.

[0046] Referring to FIG. 1, in some embodiments, the energy storage device 100 includes: A bus capacitor; The battery module 10 further includes a precharge switch assembly 60 connected to the bus capacitor and the battery module 10, which generates a precharge command when the controller 40 is powered on, the controller 40 being communicatively connected to the analog front end 30, which receives the precharge command and controls the closing of the precharge switch assembly 60 to precharge the bus capacitor.

[0047] The bus capacitor may be a capacitor provided on the bus (the main conductor that connects and distributes power) of the energy storage device 100. The bus capacitor helps balance the voltage of the circuit of the energy storage device 100, reduces voltage fluctuations in the circuit, and improves the stability of the circuit.

[0048] The switch assembly may be a metal-oxide-semiconductor field-effect transistor (MOS transistor). The precharge switch assembly 60 may be a precharge MOS transistor 60, and there may be one or more precharge MOS transistors 60.

[0049] The communication connection between the controller 40 and the analog front end 30 may be realized based on a communication protocol such as an Inter-Integrated Circuit (I2C or IIC) protocol. For example, an I2C communication line may be installed between the controller 40 and the analog front end 30.

[0050] The precharge command can be used to precharge the energy storage device 100. Before charging, the energy storage device 100 can first precharge the bus capacitor to increase the voltage of the bus capacitor, and close each relay of the energy storage device 100 to avoid a spike current that would damage each circuit element of the energy storage device 100 when charging or discharging. Therefore, based on the precharge command, the precharge switch assembly 60 is controlled to close and precharge the bus capacitor, thereby improving the safety and service life of the energy storage device.

[0051] Optionally, the energy storage device 100 The device further includes a charge / discharge switch assembly 70, and the controller 40 is further used to generate a charge / discharge command when the voltage of the bus capacitor is greater than a preset voltage, and the analog front end 30 receives the charge / discharge command to control charging or discharging of the charge / discharge switch assembly 70.

[0052] The charge / discharge switch assembly 70 may include one or more charge / discharge MOS transistors 70, such as one charge MOS transistor and one discharge MOS transistor.

[0053] The preset voltage may be a preset percentage of the rated voltage of the bus capacitor, for example, 70%, 80%, 90%, etc. of the rated voltage of the bus capacitor.

[0054] The charge / discharge commands can be used to control the charging and discharging of energy storage device 100.

[0055] A pre-charge MOS transistor 60 and a charge / discharge MOS transistor 70 can be provided in the BMS system.

[0056] Specifically, referring to FIG. 1 , a case where the controller 40 and the analog front end 30 communicate via I2C is described as an example. When the analog front end 30 sends a power supply enable signal to the enable terminal of the power supply module 50, causing the power supply module 50 to supply power to the controller 40, the controller 40 is powered on. The controller 40 generates a precharge command and transmits the precharge command to the analog front end 30 via I2C communication. When the analog front end 30 receives the precharge command, it controls the closing of the precharge MOS transistor 60, causing the battery module 10 to precharge the bus capacitor. When the voltage of the bus capacitor is greater than a preset voltage (e.g., 80% of the rated voltage of the bus capacitor), the controller 40 determines that the precharge of the energy storage device 100 is complete, generates a charge / discharge command, and transmits the charge / discharge command to the analog front end 30 via I2C communication. When the analog front end 30 receives the charge / discharge command, it controls the conduction of the charge / discharge MOS transistor 70 to perform charging or discharging.

[0057] As can be understood, when the controller 40 is powered on, it first sends a self-detection command to detect each assembly, and if the self-detection result shows that there is no fault, it sends a pre-charge command, thereby improving the safety of the operation of the energy storage device 100.

[0058] Referring to FIG. 1 , in some embodiments, the energy storage device 100 further includes a charge / discharge switch assembly 70 (charge / discharge MOS transistor 70), the charge / discharge switch assembly 70 is connected to the analog front end 30, the on / off key 20 is connected to the controller 40, when the on / off key 20 receives a shutdown operation, it generates a shutdown command, the controller 40 receives the shutdown command and controls the analog front end 30 to stop sending the power supply enable signal, and the analog front end 30 controls the disconnection of each switch of the charge / discharge switch assembly 70.

[0059] The shutdown command may be used to close the energy storage device 100 and / or control the energy storage device 100 to rest, stand by, etc.

[0060] Optionally, a shutdown command may be generated and sent to the controller 40 after the on / off key 20 receives a shutdown operation, and the shutdown command may be generated by the controller 40. For example, the controller 40 may generate the shutdown command based on the operation mode of the energy storage device 100. For example, the controller 40 generates the shutdown command when the time during which the energy storage device 100 has not performed a charging or discharging operation reaches a preset time (e.g., 1 hour (h), 1.5 h, 2 h, 2.5 h, etc.), or when the time during which the energy storage device 100 has not output any power consumption is longer than the pre-charge time.

[0061] If the analog front end 30 stops sending the power enable signal to the power supply module 50 , the power supply module 50 will lose power and will no longer supply power to the controller 40 .

[0062] Optionally, the analog front end 30 stops sending the power supply enable signal and enters a sleep state after each switch of the charge / discharge MOS assembly is turned off.

[0063] The energy storage device 100 is in a dormant state, with the battery module 10 providing power only for waking up the analog front end 30 .

[0064] Specifically, the energy storage device 100 further includes a charge / discharge switch assembly 70, which is connected to the analog front end 30, and the on / off key 20 is connected to the controller 40. When the on / off key 20 receives a shutdown operation (e.g., the on / off key 20 is pressed), it can generate a shutdown command. The controller 40 receives the shutdown command and responds to the shutdown command (e.g., by sending a shutdown command message to the analog front end 30 via I2C communication) by controlling the analog front end 30 to stop sending a power supply enable signal to the power supply module 50. The power supply module 50 stops supplying power to the controller 40, and the controller 40 continues to turn off the power until the power supply module 50 stops supplying power to the controller 40 and the controller 40 shuts down. The controller 40 may control the analog front end 30 to disconnect each switch of the charge / discharge switch assembly 70 to close the charging / discharging function of the energy storage device 100. The analog front end 30 stops sending the power supply enable signal, and after each switch of the charge / discharge MOS assembly is disconnected, it can enter a sleep state. At this time, the battery module 10 of the energy storage device 100 only needs to supply power to wake up the analog front end 30, thereby realizing low power consumption of the energy storage device 100 in the sleep state.

[0065] In other words, the present application sets the operating mode of the energy storage device 100 to a power-on operating mode and a shutdown operating mode, and in the power-on operating mode, the energy storage device 100 charges and discharges, and in the shutdown operating mode, the power consumption of the energy storage device 100 only includes the power consumption (generally less than 10 uA) required to maintain the analog front end 30, which effectively reduces the power consumption when the energy storage device 100 is not charging or discharging, and is advantageous for storing the energy storage device 100.

[0066] In some embodiments, the energy storage device 100 further comprises a charging interface 80 , which is connected to the power supply module 50 to supply power to the power supply module 50 .

[0067] Optionally, when external power is applied to the charging interface 80, the power supply module 50 supplies power to the controller 40, and when the controller 40 is powered on, generates and sends a wake-up command to the analog front end 30 to wake up the analog front end 30.

[0068] The wake-up command is a level signal, for example, the analog front end 30 may include an activation pin, the wake-up command may be a high-level signal, and the controller 40 may generate a high-level wake-up command to the activation pin of the analog front end 30 to wake up the analog front end 30.

[0069] Optionally, the analog front end 30 is in a dormant state before receiving a power-on or wake-up command.

[0070] Specifically, the charging interface 80 of the energy storage device 100 can be connected to an external power source, and the external power source supplies power to the energy storage device 100 through the charging interface 80 (e.g., the external power source supplies power to the energy storage device 100 through the charging interface 80, and the electrical energy is stored in the battery module 10). When the external power source is connected to the charging interface 80, the electrical energy of the external power source can flow into the power supply module 50 through the charging interface 80, and the power supply module 50 obtains power and supplies it to the controller 40. At this time, when the analog front end 30 is in a sleep state and the controller 40 is powered on, the controller 40 can generate a wake-up command and send it to the analog front end 30 via communication (e.g., I2C communication) with the analog front end 30 to wake up the analog front end 30. After waking up the analog front end 30, the controller 40 can generate a precharge command to control the analog front end 30 to close the precharge MOS transistor 60, thereby precharging the bus capacitor. After the precharge is completed, the controller 40 can control the analog front end 30 to close the charge / discharge MOS transistor 70 (e.g., control the closure of the charge MOS transistor), allowing the external power source to charge the battery module 10 of the energy storage device 100, thereby realizing the charging function of the energy storage device 100.

[0071] As can be seen, before generating a wake-up command, the controller 40 first performs self-detection, and if the result of the self-detection indicates that there is no fault in the energy storage device 100, it generates a wake-up command to wake up the analog front end 30.

[0072] In the description herein, a statement referring to terms such as "one embodiment," "some embodiments," "exemplary embodiments," "example," "specific example," or "some examples" means that a particular feature, structure, material, or characteristic described with reference to that embodiment or example is included in at least one embodiment or example of the present application. In this specification, general references to such terms do not necessarily refer to the same embodiment or example. In addition, a particular feature, structure, material, or characteristic described may be incorporated in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art can combine and combine the various embodiments or examples described herein and the features of the various embodiments or examples without mutual contradiction.

[0073] Although the embodiments of the present application have been shown and described, the above embodiments are illustrative and cannot be understood as limiting the present application, and it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to the above embodiments within the scope of the present application.

Claims

1. 1. An energy storage device, comprising: A battery module; an on / off key, one end of which is electrically connected to the battery module, for generating a power-on command when a power-on operation is performed; an analog front end powered by the battery module and electrically connected to the other end of the on / off key for receiving the power-on command.

2. 2. The energy storage device of claim 1, further comprising: a controller and a power supply module, wherein the power supply module is connected to the battery module, a power supply end of the power supply module is electrically connected to the controller, and an enable end of the power supply module is electrically connected to the analog front end, and when the analog front end receives the power-on command, it sends a power supply enable signal to the enable end, causing the power supply module to supply power to the controller.

3. The analog front end comprises:

3. The energy storage device of claim 2, further comprising a voltage regulator for converting a power supply voltage of the battery module to a preset voltage threshold and transmitting the power supply enable signal to the power supply module based on the preset voltage threshold.

4. 3. The energy storage device of claim 2, further comprising: a bus capacitor; and a precharge switch assembly connected to the bus capacitor and the battery module, the precharge switch assembly configured to generate a precharge command when the controller is powered on; the controller communicatively connected to the analog front end, the analog front end configured to receive the precharge command and control closing of the precharge switch assembly to precharge the bus capacitor.

5. 5. The energy storage device of claim 4, further comprising a charge / discharge switch assembly, wherein the controller is further configured to generate a charge / discharge command when the voltage of the bus capacitor is greater than a preset voltage, and the analog front end receives the charge / discharge command and controls charging or discharging of the charge / discharge switch assembly.

6. 3. The energy storage device of claim 2, further comprising a charge / discharge switch assembly, the charge / discharge switch assembly being connected to the analog front end, the on / off key being connected to the controller, and when the on / off key receives a shutdown operation, generating a shutdown command, the controller receiving the shutdown command and controlling the analog front end to stop transmitting the power supply enable signal, and controlling the analog front end to turn off each switch of the charge / discharge switch assembly.

7. 7. The energy storage device of claim 6, wherein the analog front end stops transmitting the power supply enable signal and enters a sleep state after each switch of the charge / discharge MOS assembly is turned off.

8. The energy storage device according to claim 2 , further comprising a charging interface, the charging interface being connected to the power supply module and supplying power to the power supply module.

9. 9. The energy storage device of claim 8, wherein when an external power source is applied to the charging interface, the power supply module supplies power to the controller, and when the controller is powered on, the controller generates a wake-up command and sends it to the analog front end to wake up the analog front end.

10. 10. The energy storage device of claim 9, wherein the analog front end is in a dormant state before receiving the power-on command or the wake-up command.

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