Charging control method, battery management system and vehicle

Abstract

The embodiment of the invention provides a charging control method, a battery management system and a vehicle, relates to the technical field of vehicles, and aims to at least solve the problems of charging faults, influence on charging efficiency, damage to hardware and the like caused by electrical overstress due to poor insulation of a charging pile or too close high-voltage and low-voltage wire harnesses in related technologies. The battery management system comprises an awakening module, a controller and a charging communication module, and the awakening module is used for awakening the controller based on an awakening signal sent by a charging pile; the controller is used for generating a disconnection signal after being awakened; the charging communication module is used for sending the disconnection signal to the charging pile; wherein the charging pile is used for responding to the disconnection signal and disconnecting the electric connection between the auxiliary power supply of the charging pile and the battery management system; the controller is further used for controlling the battery pack of the vehicle to be electrically connected with the high-voltage power supply of the charging pile, and the high-voltage power supply charges the battery pack.

Description

Technical Field

[0001] The present disclosure relates to, but is not limited to, the field of vehicle technology, and in particular to a charging control method, a battery management system, and a vehicle. Background Art

[0002] With the rapid development of new energy vehicles, power batteries are increasingly being used in vehicles. After the power battery is physically connected to the charging station, the battery management system (BMS) is awakened by the charging station's wake-up signal (for example, the A+ signal) to implement charging control and communication. However, if the charging station has poor insulation or the high-voltage and low-voltage wiring harnesses are too close together, a surge can be generated during charging of the battery pack, causing electrical overstress (EOS) in the BMS's A+ wake-up circuit, leading to charging failures. This not only affects charging efficiency but can also cause irreversible damage to the BMS hardware. Summary of the Invention

[0003] The embodiments of the present disclosure provide a charging control method, a battery management system, and a vehicle to at least address the problems in the related art of electrical overstress caused by poor insulation in the charging pile or close proximity of high and low voltage wiring harnesses, which may lead to charging failures, affect charging efficiency, damage hardware, and other problems.

[0004] The technical solution of the embodiment of the present disclosure is implemented as follows: The present disclosure provides a battery management system for use in a vehicle, including a wake-up module, a controller, and a charging communication module, wherein: A wake-up module, used to wake up the controller based on a wake-up signal sent by the charging pile; A controller, configured to generate a disconnect signal after being awakened; A charging communication module, configured to send a disconnection signal to the charging pile; wherein the charging pile is configured to disconnect the electrical connection between the auxiliary power supply of the charging pile and the battery management system in response to the disconnection signal, wherein the auxiliary power supply is a low-voltage power supply; The controller is also used to control the vehicle's battery pack to be electrically connected to the high-voltage power supply of the charging pile, and the high-voltage power supply charges the battery pack.

[0005] In the embodiment of the present disclosure, the wake-up module first responds to the wake-up signal of the charging pile to activate the controller to ensure normal charging and communication in the future; then, after being activated, the controller generates and sends a disconnection signal to cause the charging pile to disconnect its auxiliary power supply from the BMS, that is, disconnect the A+ wake-up circuit, thereby avoiding the A+ wake-up circuit from being interfered with or coupled by high-voltage energy during the subsequent high-voltage charging process, and preventing EOS caused by poor insulation or close high and low voltage wiring harnesses, thereby reducing the possibility of charging failure, improving charging efficiency and reducing the possibility of hardware damage; finally, after disconnecting the A+ wake-up circuit, the controller controls the high-voltage power supply to be electrically connected to the battery pack, so as to use the high-voltage power supply to charge the battery pack, thereby improving the safety and reliability of the charging process.

[0006] In some embodiments, the battery management system also includes a system base chip and a self-test module, and the wake-up module includes a first wake-up module and a second wake-up module. The first wake-up module is used to wake up the system base chip based on a wake-up signal; the system base chip is used to initially wake up the controller after being awakened by the first wake-up module; the self-test module is used to generate a power signal based on the wake-up signal; the controller is also used to activate the second wake-up module based on the power signal; the second wake-up module is used to wake up the system base chip based on the first target power supply, and the first target power supply is a low-voltage power supply; the system base chip is also used to synchronously wake up the controller after being awakened by the second wake-up module.

[0007] In the embodiment of the present disclosure, on the one hand, by setting the first wake-up module and the second wake-up module to wake up the system basic chip respectively, and using the system basic chip to gradually wake up the controller, a staged and multi-level wake-up mechanism is implemented to ensure that the controller can be reliably awakened even in different power supply states or complex environments, thereby enhancing the stability and adaptability of the system; on the other hand, the power status of the first target power supply is detected by the self-test module, and the second wake-up module is activated only when the first target power supply is in a non-depleted state, thereby ensuring that the system basic chip can work stably, avoiding wake-up failure due to depleted power of the first target power supply, and further improving the security and robustness of the system.

[0008] In some embodiments, the second wake-up module includes a first transistor and a second transistor, the first end of the first transistor is connected to the controller; the second end of the first transistor is connected to the first end of the second transistor; the third end of the first transistor is grounded; the second end of the second transistor is connected to the first target power supply; and the third end of the second transistor is connected to the system base chip.

[0009] In the embodiment of the present disclosure, two transistors are used to form a second wake-up module, so that the second wake-up module can realize controllable wake-up of the system basic chip based on the control signal sent by the controller, that is: the controller determines whether to start the working state of the second transistor by controlling whether the first transistor is on or not. When the second transistor is on, the energy of the first target power supply is transferred to the system basic chip, and the wake-up of the system basic chip is completed. It can effectively isolate the high-voltage surge caused by poor insulation or close high and low voltage harnesses between the charging pile and the BMS, thereby ensuring the safety and reliability of the entire vehicle during the charging process.

[0010] In some embodiments, the controller is further configured to activate the second wake-up module when the power signal is a first power signal; wherein the first power signal indicates that the first target power supply is in a full power state.

[0011] In the embodiment of the present disclosure, the second wake-up module is activated only when the first target power supply is in a non-depleted state, thereby ensuring that the system basic chip can operate stably, avoiding wake-up failure due to depletion of the first target power supply, and further improving the security and robustness of the system.

[0012] In some embodiments, the controller is further configured to control the discharge of the battery pack to charge the first target power supply when the power signal is a second power signal, and to activate the second wake-up module after charging is completed; wherein the second power signal indicates that the first target power supply is in a power-deficient state.

[0013] In the embodiment of the present disclosure, when it is detected that the first target power supply is in a low-power state, it is first recharged by the battery pack and then the subsequent wake-up process is continued, ensuring that normal wake-up and charging operations can be completed even when the first target power supply is insufficient, thereby improving the system's fault tolerance.

[0014] In some embodiments, the self-test module is used to determine a first voltage based on a wake-up signal; when it is determined that the first voltage is not greater than a second voltage provided by the first target power supply, the first power signal is used as the power signal; when it is determined that the first voltage is greater than the second voltage, the second power signal is used as the power signal.

[0015] In the embodiment of the present disclosure, by comparing the reference voltage with the output voltage of the first target power supply through the self-test module, it is possible to accurately determine whether it is in a power-deficient state, thereby providing a reliable basis for subsequent wake-up strategies and improving the judgment accuracy and system response accuracy.

[0016] In some embodiments, the self-test module includes a voltage regulator and a comparator, and the input end of the voltage regulator is connected to the target power supply; wherein the target power supply includes a second target power supply or an auxiliary power supply, and the second target power supply is a low-voltage power supply; the output end of the voltage regulator is connected to the second input end of the comparator; the first input end of the comparator is connected to the first target power supply; and the output end of the comparator is connected to the controller.

[0017] In the embodiment of the present disclosure, a self-test module consisting of a voltage regulator tube and a comparator is set up to perform real-time detection on the first target power supply to accurately determine whether the first target power supply is in a deep power-loss state, and automatically start the power replenishment process when the first target power supply is in a deep power-loss state, thereby realizing an automated voltage detection and response mechanism, thereby improving the intelligence and operation efficiency of the system.

[0018] In some embodiments, the battery management system also includes a self-test module. During the charging process of the battery pack, the controller is also used to control the second target power supply to charge the first target power supply when the power signal generated by the self-test module is a second power signal; wherein the first target power supply is a low-voltage power supply, the second power signal indicates that the first target power supply is in a power-deficient state, and the second target power supply is a low-voltage power supply.

[0019] In the disclosed embodiment, the status of the first target power source is monitored in real time during the battery pack charging process, and the second target power source is started to charge it when it is low on power, thereby ensuring the power supply stability during the entire charging process and improving the operating efficiency and safety of the overall system.

[0020] In some embodiments, the self-test module is configured to use the first power signal as the power signal when it is determined that the third voltage is not greater than the second voltage provided by the first target power supply; and use the second power signal as the power signal when it is determined that the third voltage is greater than the second voltage; wherein the third voltage is determined by the fourth voltage provided by the second target power supply, the third voltage is not greater than the fourth voltage, and the first power signal indicates that the first target power supply is in a non-power-deficient state.

[0021] In the embodiment of the present disclosure, during the charging process, the self-test module compares and judges the voltage of the first target power supply to further confirm whether the first target power supply needs to be charged, thereby optimizing the power management logic and improving the intelligence level of the system.

[0022] An embodiment of the present disclosure provides a charging control method, which is applied to a controller of a battery management system of a vehicle. The charging control method includes: After being awakened by the wake-up signal sent by the charging pile, a disconnect signal is generated; Sending a disconnect signal to the charging pile; wherein the charging pile is used to disconnect the electrical connection between the auxiliary power supply of the charging pile and the battery management system in response to the disconnect signal, the auxiliary power supply being a low-voltage power supply; The battery pack of the control vehicle is electrically connected to the high-voltage power supply of the charging pile, and the high-voltage power supply charges the battery pack.

[0023] In the embodiment of the present disclosure, the wake-up signal of the charging pile is first activated to ensure normal charging and communication in the future; then, after being activated, a disconnection signal is generated and sent to disconnect the charging pile from its auxiliary power supply and the BMS, that is, the A+ wake-up loop is disconnected, thereby avoiding the A+ wake-up loop from being interfered with or coupled by high-voltage energy during the subsequent high-voltage charging process, preventing EOS caused by poor insulation or close proximity of high and low voltage wiring harnesses, thereby reducing the possibility of charging failure, and improving charging efficiency while also reducing the possibility of hardware damage; finally, after disconnecting the A+ wake-up loop, the high-voltage power supply is controlled to be electrically connected to the battery pack, so as to use the high-voltage power supply to charge the battery pack, thereby improving the safety and reliability of the charging process.

[0024] In some embodiments, the charging control method further includes: activating a second wake-up module of the battery management system when the power signal generated based on the wake-up signal is a first power signal; wherein the first power signal indicates that the first target power supply is in a non-power-deficient state and the first target power supply is a low-voltage power supply; the second wake-up module is used to wake up the system base chip of the battery management system; and the system base chip is used to wake up the controller.

[0025] In the embodiment of the present disclosure, by detecting the power status of the first target power supply and activating the second wake-up module only when the first target power supply is in a non-depleted state, it is ensured that the system basic chip can operate stably, avoiding wake-up failure caused by depletion of power in the first target power supply, and further improving the security and robustness of the system.

[0026] In some embodiments, when the power signal indicates that the first target power source is in a power-deficient state, the charging control method further includes: controlling the battery pack to discharge to charge the first target power source, and activating the second wake-up module after charging is completed.

[0027] In the embodiment of the present disclosure, when it is detected that the first target power supply is in a low-power state, it is first recharged by the battery pack and then the subsequent wake-up process is continued, ensuring that normal wake-up and charging operations can be completed even when the first target power supply is insufficient, thereby improving the system's fault tolerance.

[0028] In some embodiments, during the charging process of the battery pack, the charging control method further includes: when the power signal generated based on the second target power supply is a second power signal, controlling the second target power supply to charge the first target power supply; wherein the second power signal indicates that the first target power supply is in a power-deficient state and the second target power supply is a low-voltage power supply.

[0029] In the disclosed embodiment, the status of the first target power source is monitored in real time during the battery pack charging process, and the second target power source is started to charge it when it is low on power, thereby ensuring the power supply stability during the entire charging process and improving the operating efficiency and safety of the overall system.

[0030] An embodiment of the present disclosure provides a vehicle, comprising any of the above-mentioned battery management systems.

[0031] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings herein are incorporated into and constitute a part of the specification. These drawings illustrate embodiments consistent with the present disclosure and, together with the specification, are used to explain the technical solutions of the present disclosure.

[0033] Figure 1 A schematic diagram of the structure of a battery management system provided in an embodiment of the present disclosure Figure 1 ; Figure 2 A schematic diagram of the structure of a charging system provided in an embodiment of the present disclosure; Figure 3 A schematic diagram of the circuit structure of a self-test module provided in an embodiment of the present disclosure; Figure 4 A schematic diagram of the circuit structure of a second wake-up module provided in an embodiment of the present disclosure; Figure 5 A schematic diagram of the implementation process of a charging control method provided in an embodiment of the present disclosure Figure 1 ; Figure 6 A schematic diagram of the structure of a battery management system provided in an embodiment of the present disclosure Figure 2 ; Figure 7 A schematic diagram of the implementation process of a charging control method provided in an embodiment of the present disclosure Figure 2 . DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the present disclosure clearer, the present disclosure will be further described in detail below with reference to the accompanying drawings. The described embodiments should not be regarded as limiting the present disclosure. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present disclosure.

[0035] In the following description, reference is made to “some embodiments”, which describes a subset of all possible embodiments, but it will be understood that “some embodiments” may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.

[0036] In the following description, the terms "first\second\third" are merely used to distinguish similar objects and do not represent a specific ordering of the objects. It is understandable that "first\second\third" can be interchanged with a specific order or sequence where permitted, so that the embodiments of the present disclosure described herein can be implemented in an order other than that illustrated or described herein.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art in the art of the present disclosure. The terms used herein are only for the purpose of describing the embodiments of the present disclosure and are not intended to limit the present disclosure.

[0038] New energy batteries are increasingly being used in everyday life and industry. They are not only used in energy storage systems such as hydropower, thermal, wind, and solar power plants, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric vehicles, as well as in aerospace and other fields. As the application areas of power batteries continue to expand, the market demand is also growing. Batteries can be single cells. A single cell is a basic unit that can convert chemical energy into electrical energy and can be used to make battery modules or battery packs, which are then used to power electrical devices. A single cell can be a secondary battery, which is a cell that can be recharged to activate the active material after discharge, allowing for continued use. Cells can be lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-metal hydride batteries, nickel-cadmium batteries, lead-acid batteries, and others. A battery can also be a single physical module comprising one or more cells to provide higher voltage and capacity. When there are multiple cells, they are connected in series, parallel, or in parallel via a busbar. The electrode plate is the main component of a single battery and directly determines the electrochemical performance and safety of the battery.

[0039] With the rapid development of new energy vehicles, power batteries are increasingly used in vehicles. At present, the charging process of power batteries is mainly as follows: (1) Physical connection: The charging pile is physically connected to the vehicle; (2) Wake-up: Connect the BMS to the auxiliary power supply provided by the charging pile and then power on to wake up the BMS (i.e. A+ wake-up); (3) Charging handshake phase: The charging pile and BMS confirm the connection status and protocol compatibility through message exchange; (4) Charging parameter configuration: charging current, charging voltage, charging mode (e.g., constant current mode, constant voltage mode), etc.; (5) Charging stage: charging the power battery through the power provided by the charging pile; (6) Charging is completed.

[0040] If the insulation of the charging station is poor or the high- and low-voltage wiring harnesses are too close, high-voltage energy can easily enter the A+ wake-up circuit through coupling or crosstalk, causing a surge and causing an EOS in the A+ wake-up circuit, leading to charging failure. This not only affects charging efficiency but may also cause irreversible damage to the BMS hardware.

[0041] An embodiment of the present disclosure provides a battery management system, in which a wake-up module first activates a controller in response to a wake-up signal from a charging pile to ensure subsequent normal charging and communication; then, after being activated, the controller generates and sends a disconnection signal to cause the charging pile to disconnect its auxiliary power supply from the BMS, i.e., disconnecting the A+ wake-up circuit, thereby preventing the A+ wake-up circuit from being interfered with or coupled by high-voltage energy during the subsequent high-voltage charging process, and preventing EOS caused by poor insulation or close proximity of high and low voltage wiring harnesses, thereby reducing the possibility of charging failures, improving charging efficiency, and reducing the possibility of hardware damage; finally, after disconnecting the A+ wake-up circuit, the controller controls the high-voltage power supply to be electrically connected to the battery pack, so as to use the high-voltage power supply to charge the battery pack, thereby improving the safety and reliability of the charging process.

[0042] The BMS provided in the embodiments of the present disclosure includes at least a wake-up module, a controller, and a charging communication module. These three modules work together to ensure the safety and reliability of the entire charging control process. The following will provide a clear and complete description of the technical solutions in the embodiments of the present disclosure, combined with the accompanying drawings.

[0043] Figure 1 A schematic diagram of the structure of a battery management system provided in an embodiment of the present disclosure Figure 1 ,like Figure 1 As shown, the battery management system 221 includes a wake-up module 11, a controller 12 and a charging communication module 13, wherein: A wake-up module 11 is configured to wake up the controller 12 based on a wake-up signal sent by the charging pile; The controller 12 is configured to generate a disconnect signal after being awakened; The charging communication module 13 is configured to send a disconnection signal to the charging pile; wherein the charging pile is configured to disconnect the electrical connection between the auxiliary power supply of the charging pile and the battery management system 221 in response to the disconnection signal; The controller 12 is also used to control the battery pack of the vehicle to be electrically connected to the high-voltage power supply of the charging pile, and the high-voltage power supply charges the battery pack.

[0044] Here, the wake-up module may be any suitable hardware module capable of implementing the function. The function of the wake-up module is mainly to receive a wake-up signal from the charging pile and trigger the start-up of the controller according to the wake-up signal.

[0045] The wake-up signal can be the A+ signal. The A+ signal is a key control signal between the charging station and the vehicle used to wake up the BMS. When the user plugs in the charger and completes the physical connection between the vehicle and the charging station, the auxiliary power supply within the charging station is powered on and sends the A+ signal to the BMS. The auxiliary power supply can be any suitable low-voltage source (i.e., a low-voltage power supply) that provides a suitable voltage, such as 12V. Upon receiving the A+ signal, the wake-up module wakes up the controller to prepare for subsequent communication and charging operations.

[0046] The number of wake-up modules may be at least one. In some embodiments, the wake-up module may include but is not limited to at least one of a first wake-up module, a second wake-up module, etc. The first wake-up module may refer to an A+ wake-up module, which mainly uses an A+ signal to preliminarily wake up the controller. The preliminary wake-up may be a state in which the controller is powered on and runs quickly. The second wake-up module may refer to a self-wake-up module, which mainly uses a first target power supply to deeply wake up the controller. The deep wake-up may be a state in which the controller is fully and normally working. The first target power supply may be any suitable low-voltage power supply inside the BMS, for example, a KL30 power supply. The KL30 power supply is also called a normal power supply, that is, a lead-acid battery, which is used to provide the operating voltage for the BMS and some electronic control units of the entire vehicle. The voltage provided by the KL30 power supply is usually 12 volts (Volt, V), 24V, etc.

[0047] In some embodiments, the wake-up module may directly wake up the controller through the wake-up signal, or may indirectly wake up the controller through the wake-up signal, that is, first wake up other modules through the wake-up signal, and then wake up the controller through the other modules.

[0048] The wake-up module can be integrated into the BMS. The wake-up module detects the external input signal to determine whether the controller needs to be woken up, so that the controller starts the entire charging process.

[0049] Understandably, in actual implementation, the wake-up module's recognition and response to the A+ signal is the first step in the entire charging control process and a prerequisite for ensuring smooth subsequent communication and operation. Failure to correctly recognize the wake-up signal may prevent the controller from starting properly, affecting the stability and safety of the entire charging process.

[0050] The controller can be any suitable device capable of implementing this function, such as a microcontroller unit (MCU). It is understood that the controller refers to the main control unit of the BMS, which is responsible for generating various control commands and exchanging data with the charging station through the charging communication module. The controller is an electronic control unit that performs data processing, logical judgment, and command execution.

[0051] The disconnect signal is a signal used to control the operation of the first switch module within the charging pile, severing the connection between the auxiliary power supply and the BMS. The first switch module is used to close or disconnect the A+ circuit, which can be formed by the auxiliary power supply, the BMS, and the first switch module. The first switch module includes at least one switch, which can be a relay, contactor, or other device. In some embodiments, the first switch module may include, but is not limited to, at least one of a third relay K3 and a fourth relay K4. K3 connects the positive terminal of the auxiliary power supply to the positive terminal of the BMS, and K4 connects the negative terminal of the auxiliary power supply to the negative terminal of the BMS. In implementation, when the charging pile determines that a physical connection with the vehicle has been established, it controls K3 and K4 to close, forming the A+ circuit. This allows the controller to be awakened by the A+ signal provided by the auxiliary power supply. Once awakened, the controller sends a disconnect signal to the charging pile. In response to this disconnect signal, the charging pile controls K3 and K4 to disconnect, disconnecting the A+ circuit. This prevents subsequent high-voltage circuit energy from coupling into the A+ circuit through the low-voltage wiring harness, thereby preventing EOS from causing damage to the BMS.

[0052] In some embodiments, before charging, when the controller determines that the lead-acid battery is fully charged and has completed the self-wake-up process, it automatically generates a disconnect signal and sends it to the charging station via the CAN bus. Upon receiving the disconnect signal, the charging station immediately disconnects K3 / K4, thereby severing the A+ circuit. In some embodiments, if the lead-acid battery is detected to be deeply discharged, the disconnect signal is sent again after the battery is fully charged to ensure that all pre-processing steps are completed before proceeding with subsequent charging.

[0053] The charging communication module refers to the hardware module in the BMS used to communicate with the charging pile. The charging communication module can communicate with the charging pile through any suitable bus, for example, the Controller Area Network (CAN) bus. The charging communication module supports standard communication protocols, such as the CAN protocol, to ensure accurate information exchange with the charging pile. In some embodiments, the charging communication module can perform handshake communication with the charging pile through the CAN bus to transmit charging parameters, status information, and control instructions. In some embodiments, the charging communication module can also be used to monitor the working status of the charging pile in real time to ensure that the charging pile operates within a safe range.

[0054] During implementation, the charging communication module connects to the controller and transmits the disconnect signal received from the controller to the charging station. In practice, the controller's generation and transmission of the disconnect signal is a core component of the overall charging control strategy. By actively disconnecting the auxiliary power supply, the impact of the subsequent high-voltage circuit on the low-voltage circuit can be effectively isolated, thereby preventing EOS issues caused by poor insulation and improving the overall safety and stability of the charging system.

[0055] A high-voltage power supply refers to a DC power supply used in a charging pile to provide charging energy for a battery pack, typically ranging from several hundred volts to several thousand volts. The output power of the high-voltage power supply is large enough to meet the fast charging requirements of a large-capacity battery pack. In the disclosed embodiment, the high-voltage power supply is enabled only after the A+ circuit is disconnected to ensure the safety of the charging process. In some embodiments, after receiving the disconnect signal, the charging pile will delay for a period of time before turning on the high-voltage power supply to prevent instantaneous surges from damaging the BMS. In some embodiments, in some charging piles, the high-voltage power supply also has an intelligent adjustment function, which can dynamically adjust the output voltage and current according to the state of the battery pack to optimize the charging efficiency.

[0056] The manner of controlling the electrical connection between the battery pack and the high-voltage power supply may be any appropriate manner.

[0057] In some embodiments, the electrical connection between the battery pack and the high-voltage power supply can be established by closing the target switch. The target switch can be located between the battery pack and the high-voltage power supply. When the target switch is closed, the high-voltage power supply charges the battery pack; when the target switch is disconnected, the high-voltage power supply stops charging the battery pack. The target switch can be a relay, a contactor, etc. During implementation, the process of the controller controlling the closing of the target switch marks that the entire charging process has officially entered the high-voltage charging stage. By reasonably controlling the on-off timing of the target switch, the interference to the battery management system and other low-voltage systems can be minimized while ensuring the charging efficiency, thereby improving the safety and reliability of the entire charging process.

[0058] In some embodiments, the BMS also includes a target switch module. The target switch may be a switch within the target switch module. The target switch module refers to an electronic switching device within the BMS that controls the on / off of the high-voltage circuit. The high-voltage circuit may consist of a high-voltage power supply, a battery pack, and the target switch module. The target switch module may include at least one switch, such as a relay or contactor. Under the control of the controller, the target switch module can close or open the high-voltage circuit to enable power transfer between the battery pack and the charging station. In some embodiments, the target switch module may include, but is not limited to, at least one of a fifth relay K5 and a sixth relay K6. K5 connects the positive terminal of the high-voltage power supply to the positive terminal of the battery pack, and K6 connects the negative terminal of the high-voltage power supply to the negative terminal of the battery pack. In implementation, after the controller confirms that the A+ circuit has been successfully disconnected and all pre-charging processes have completed, it controls the switch within the target switch module to close, thereby allowing high-voltage current to flow into the battery pack. In some embodiments, after charging is complete, the controller may also disconnect the high-voltage circuit via the target switch module to prevent overcharging or other abnormal conditions.

[0059] In some embodiments, when the BMS includes a target switch module, the controller controls a switch in the target switch module to close, thereby establishing an electrical connection between the battery pack and the high voltage power source.

[0060] In some embodiments, the charging pile further includes a second switch module for closing or opening the high-voltage circuit. The high-voltage circuit may be composed of a high-voltage power supply, a battery pack, a second switch module, or a high-voltage power supply, a battery pack, a second switch module, and a target switch module. The second switch module includes at least one switch, which may be a relay, a contactor, or the like. In some embodiments, the second switch module may include, but is not limited to, at least one of a first relay K1 and a second relay K2. K1 is used to connect the positive pole of the high-voltage power supply to one end of K5, and the other end of K5 is connected to the positive pole of the battery pack. K2 is used to connect the negative pole of the high-voltage power supply to one end of K6, and the other end of K6 is connected to the negative pole of the battery pack. During implementation, when the charging pile and the BMS determine that the charging parameter configuration is complete or the BMS wakes up, the charging pile controls K1 and K2 to close, and the controller controls K5 and K6 to close, forming a high-voltage circuit. The charging pile converts the external high-voltage AC into high-voltage DC and transmits it to the battery pack for charging.

[0061] In some embodiments, when the charging pile includes a second switch module, the controller may also generate a connection signal and send the connection signal to the charging pile through the charging communication module. The charging pile is used to control the closure of the switch in the second switch module in response to the connection signal, thereby establishing an electrical connection between the battery pack and the high-voltage power supply.

[0062] It is understandable that before charging, the BMS and the charging pile need to perform charging handshake and charging parameter configuration.

[0063] Figure 2 A schematic diagram of the structure of a charging system provided in an embodiment of the present disclosure is shown in FIG. Figure 2 As shown, the charging system includes a charging pile 21 and a vehicle 22. The charging pile includes an auxiliary power supply 211, an AC / DC converter 212, a second switch module 213, a first switch module 214, and an off-board charger controller 215. The vehicle 22 includes at least a battery management system 221, a battery pack 222, and a target switch module 223. After the charging pile 21 and the vehicle 22 are physically connected, the off-board charger controller 215 controls the first switch module 214 to close to establish an A+ circuit and transmit the A+ signal to the battery management system 221; After the wake-up module of the battery management system 221 wakes up the controller based on the A+ signal, the controller sends a disconnect signal to the charging pile 21 through the charging communication module; The off-board charger controller 215 controls K3 and K4 in the first switch module 214 to be disconnected, thereby disconnecting the A+ circuit; The charging pile 21 and the battery management system 221 confirm the connection status through CC signals, where CC1 is used by the charging pile 21 to detect whether the charging gun has been correctly inserted into the socket of the vehicle 22, and CC2 is used by the vehicle 22 to detect the connection status of the charging gun; The charging pile 21 and the battery management system 221 confirm the connection charging parameters through the S+ signal; After confirming the charging parameters, the off-board charger controller 215 controls K1 and K2 in the second switch module 213 to close, and the battery management system 221 controls K5 and K6 in the target switch module 223 to close, thereby establishing a high-voltage circuit. The AC / DC converter 212 converts the external AC power into DC power, and transmits the DC power to charge the battery pack 222 via the DC+ signal; After charging is completed, the off-board charger controller 215 controls K1 and K2 in the second switch module 213 to be disconnected, and the battery management system 221 controls K5 and K6 in the target switch module 223 to be disconnected, thereby disconnecting the high-voltage circuit.

[0064] In the embodiment of the present disclosure, the wake-up module first responds to the wake-up signal of the charging pile to activate the controller to ensure normal charging and communication in the future; then, after being activated, the controller generates and sends a disconnection signal to cause the charging pile to disconnect its auxiliary power supply from the BMS, that is, disconnect the A+ wake-up circuit, thereby avoiding the A+ wake-up circuit from being interfered with or coupled by high-voltage energy during the subsequent high-voltage charging process, and preventing EOS caused by poor insulation or close high and low voltage wiring harnesses, thereby reducing the possibility of charging failure, improving charging efficiency and reducing the possibility of hardware damage; finally, after disconnecting the A+ wake-up circuit, the controller controls the high-voltage power supply to be electrically connected to the battery pack, so as to use the high-voltage power supply to charge the battery pack, thereby improving the safety and reliability of the charging process.

[0065] In some embodiments, the battery management system also includes a system base chip and a self-test module, and the wake-up module includes a first wake-up module and a second wake-up module. The first wake-up module is used to wake up the system base chip based on a wake-up signal; the system base chip is used to initially wake up the controller after being awakened by the first wake-up module; the self-test module is used to generate a power signal based on the wake-up signal; the controller is also used to activate the second wake-up module based on the power signal; the second wake-up module is used to wake up the system base chip based on the first target power supply; the system base chip is also used to synchronously wake up the controller after being awakened by the second wake-up module.

[0066] Here, the first wake-up module may refer to an A+ wake-up module, which mainly wakes up the controller preliminarily through an A+ signal.

[0067] The System Basis Chip (SBC) is a low-power control chip responsible for managing the system's startup and basic function control. In this disclosure, the SBC, as one of the core control units of the BMS, connects other modules to wake up the controller during the system wake-up process. When the first wake-up module receives the A+ signal, it transmits the wake-up signal to the SBC, triggering the SBC to enter its initial operating state. During the initial operating phase, the SBC primarily performs tasks such as power management and clock initialization. The SBC provides support for subsequent controller wake-ups to prevent delayed wake-ups from affecting the stability of the entire charging process.

[0068] The controller is the core processing unit in the BMS. After the first wake-up module wakes up the SBC, the SBC can send a wake-up command to the controller. After receiving the command, the controller enters the initial operation state. When the controller is in the initial operation stage, the controller can only load the most basic program modules, thereby achieving the purpose of reducing power consumption and speeding up the response speed. The initial wake-up of the controller by the SBC can ensure that the controller can operate stably in subsequent operations and that the controller can respond to commands from the charging pile or other modules in a timely manner. This initial wake-up method improves the reaction efficiency and reliability of the entire system.

[0069] The first and second wakeup modules are responsible for different wakeup paths. The first wakeup module primarily powers the SBC using an external wakeup signal (such as the A+ signal), which in turn powers the controller through the SBC to initially wake up the controller. The second wakeup module uses the internal first target power supply to wake up the SBC, which in turn wakes up the controller through the SBC, ensuring system stability and redundancy.

[0070] When the charging pile sends an A+ signal, the A+ signal is transmitted to the BMS end of the vehicle through the charging harness. After receiving the A+ signal, the first wake-up module converts the A+ signal into a wake-up command that can be recognized by the SBC. Because the SBC has low power consumption and high response speed, it can quickly enter the working state and start the initial wake-up process. In some embodiments, the SBC will initialize some key registers and interfaces during the initial wake-up process to prepare for the subsequent full wake-up of the controller. The initial wake-up process of the SBC not only reduces the overall wake-up time, but also reduces the energy waste caused by long waiting times.

[0071] As an intermediate wake-up node, the SBC acts as a bridge during this phase. It not only receives and processes the wake-up signal but also sends a wake-up prompt to the controller, expediting its entry into operation. Furthermore, the SBC monitors the quality of the wake-up signal, such as voltage stability and signal integrity, to ensure a safe and reliable wake-up process. For example, if the A+ signal fluctuates or is interrupted, the SBC can delay controller wake-up to avoid false triggering or incomplete wake-up.

[0072] The self-test module is a hardware module that monitors the internal status of the battery system (such as voltage, current, and temperature) and generates corresponding signals for other modules to determine whether the system is operating normally. A functional unit within the BMS, the self-test module monitors and determines the status of internal or external power sources. This module primarily monitors the voltage level of the primary power source to determine whether it is low on power, thereby ensuring the stability of the power supply system before the BMS wakes up.

[0073] The main function of the self-test module is to detect the voltage status of the first target power supply before the system wakes up and determine whether the first target power supply is in a deep power-loss state. If the first target power supply is insufficient, the system may experience unstable power supply in subsequent operations, affecting the normal operation of the BMS. By performing real-time detection of the status of the first target power supply by the self-test module, the system can ensure sufficient power supply before formal operation. This detection method can effectively prevent the BMS from malfunctioning due to insufficient power in the first target power supply, thereby improving the stability and security of the entire system.

[0074] The power signal is generated by the self-test module based on the received wake-up signal and reflects the current state of the first target power source. The power signal may include, but is not limited to, a first power signal and a second power signal. By subdividing the power signal into the first power signal and the second power signal, the current state of the first target power source can be more accurately determined. The control system can then decide whether to initiate the recharging process or adjust the charging strategy, ultimately improving the accuracy and safety of the control system's response to battery status.

[0075] The first power signal is a specific type of power signal, which is used to indicate that the first target power supply is in a full power state (or non-power-down state), that is, the voltage of the first target power supply is within a normal range and has sufficient power supply capacity.

[0076] The second power signal is a specific type of power signal used to indicate that the first target power supply is in a low-power state. That is, the voltage of the first target power supply is lower than a preset voltage threshold, which can be 10V, 8V, etc., and can be configured independently according to actual needs. The low-power state means that the voltage of the first target power supply is lower than the safe operating lower limit set by the system. When the voltage of the first target power supply is lower than the safe operating lower limit set by the system, the first target power supply is no longer sufficient to support the stable operation of the BMS, and other power supply methods are required to supplement energy. For example, the high-voltage battery pack supplies power to the first target power supply through a DC-DC converter.

[0077] During implementation, when the self-test module receives the A+ signal, it begins detecting the voltage of the first target power supply and, based on whether the voltage of the first target power supply is higher than a reference voltage, generates a power signal indicating the state of the first target power supply. The reference voltage is generated based on the A+ signal. This power signal can be a digital signal, which is acquired by the controller and used to determine whether to proceed to the subsequent operation step. This power signal can also be an analog signal, which is processed into a digital signal by other modules and then transmitted to the controller. The other modules can be any suitable modules that have the function of converting analog signals into digital signals.

[0078] The second wake-up module can refer to a self-wake-up module, which mainly uses the first target power supply to deeply wake up the controller. The second wake-up module is another wake-up mechanism enabled by the controller after completing the initial operation. The function of the second wake-up module is to further wake up the SBC, thereby allowing the SBC to enter a deeper working mode. The controller decides whether to activate the second wake-up module based on the power signal provided by the self-test module. The system will only activate the second wake-up module if the first target power supply is in good condition to ensure the security of the entire wake-up process. Through the controller's intelligent control of the second wake-up module, the system can achieve flexible response under different operating conditions. The controller can avoid performing unnecessary high-power wake-up operations, thereby reducing overall energy consumption and further improving the system's energy efficiency.

[0079] After being activated by the controller, the second wake-up module reawakens the SBC based on the first target power supply. The SBC then enters a fully operational state and simultaneously wakes up the controller, restoring full functionality. This dual-layer wake-up mechanism effectively avoids single points of failure and improves system fault tolerance and stability.

[0080] The first target power source is a stable, low-voltage power source that is preferentially used in the charging system, such as a KL30 power source. The first target power source is independent of the auxiliary power source provided by the charging station, providing greater stability and safety. In some embodiments, the second wake-up module must be activated before the SBC can be woken up. During implementation, the controller activates the second wake-up module when it receives a first power signal indicating that the first target power source is in a full-power state.

[0081] The first and second wake-up modules have a clear collaborative relationship. The first wake-up module is responsible for waking up the SBC via the charger's A+ signal, initially waking up the controller through the SBC, while the second wake-up module uses the vehicle's own first target power source to ensure the controller is awakened. The SBC plays a connecting role in both wake-up paths, receiving the wake-up signal and coordinating the subsequent controller wake-up process, ensuring the consistency and efficiency of the entire wake-up process.

[0082] In some embodiments, since the first wake-up module has already woken up the controller, the BMS can perform a charging handshake and configure charging parameters with the charging pile while the second wake-up module is operating. In some embodiments, the BMS can also perform a charging handshake and configure charging parameters with the charging pile after the second wake-up module wakes up the controller.

[0083] During implementation, when the entire vehicle is connected to the charging pile and the physical connection is completed, the charging pile first provides auxiliary power to power on, and the A+ signal is activated. At this time, the BMS receives the A+ signal and starts to execute the self-test process, namely: the self-test module generates a reference voltage based on the A+ signal, and detects whether the voltage of the first target power supply is greater than the reference voltage. If so, a first power signal is generated, indicating that the lead-acid battery is sufficiently charged. Subsequently, the controller activates the second wake-up module according to the first power signal, so that the second wake-up module wakes up the SBC, thereby waking up the controller through the SBC. It can be understood that the self-test module based on the wake-up signal and the wake-up of the first wake-up module based on the wake-up signal are performed synchronously.

[0084] In the embodiment of the present disclosure, on the one hand, by setting the first wake-up module and the second wake-up module to wake up the system basic chip respectively, and using the system basic chip to gradually wake up the controller, a staged and multi-level wake-up mechanism is implemented to ensure that the controller can be reliably awakened even in different power supply states or complex environments, thereby enhancing the stability and adaptability of the system; on the other hand, the power status of the first target power supply is detected by the self-test module, and the second wake-up module is activated only when the first target power supply is in a non-depleted state, thereby ensuring that the system basic chip can work stably, avoiding wake-up failure due to depleted power of the first target power supply, and further improving the security and robustness of the system.

[0085] In some embodiments, the self-test module includes a Zener diode and a comparator, the input end of the Zener diode is connected to the target power supply; wherein the target power supply includes a second target power supply or an auxiliary power supply; the output end of the Zener diode is connected to the second input end of the comparator; the first input end of the comparator is connected to the first target power supply; and the output end of the comparator is connected to the controller.

[0086] Here, a Zener diode is an electronic component used to stabilize voltage output. Its function is to convert the input voltage into a stable reference voltage output for subsequent circuitry. The input of the Zener diode is connected to the target power supply. This connection method allows the Zener diode to provide a stable reference voltage, which is used as a basis for the subsequent comparator's judgment process. This ensures that the system can still obtain reliable comparison results even if the power supply voltage fluctuates, effectively improving system stability.

[0087] The target power source can be dynamically configured based on the charging process. For example, during the wake-up phase, the target power source can be the auxiliary power source of the charging station; after disconnecting the A+ circuit, the target power source can be the second target power source within the BMS. The second target power source is a low-voltage power source.

[0088] A comparator is an analog circuit device used to compare the magnitudes of two input signals. The output of a voltage regulator diode serves as the comparator's second input, providing a fixed reference voltage. The comparator's other input is connected to a first target power supply. The comparator compares the first and second input voltages to determine the relationship between them and outputs a high or low signal for subsequent logic processing.

[0089] During implementation, the voltage of the first target power supply is connected to the first input terminal of the comparator and compared with the reference voltage output by the voltage regulator to determine whether the first target power supply is in a deep power-down state. If the voltage of the first target power supply is lower than the reference voltage, it indicates that the first target power supply is low on power and a recharge mechanism needs to be activated. By setting the connection method between the comparator and the first target power supply, a direct wake-up operation can be avoided when the power of the first target power supply is too low, which can prevent system anomalies or false triggering due to insufficient power, thereby improving the controllability and safety of the entire charging process.

[0090] The comparator's output is connected to the controller. When the comparator detects that the voltage of the first target power supply is lower than the reference voltage, it sends a signal to the controller, which then determines whether to initiate a recharging operation or other control strategy. This connection between the comparator and the controller enables automated voltage detection and response, improving both system intelligence and operational efficiency.

[0091] Figure 3 A circuit structure diagram of a self-test module provided in an embodiment of the present disclosure is shown in FIG. Figure 3 As shown, the self-test module includes a voltage regulator U1, a comparator U9, a first resistor R43, a second resistor R44, a third resistor R45, a fourth resistor R41 and a fifth resistor R42, wherein: U1 can be a three-terminal programmable voltage regulator. The output voltage of U1 can be set by configuring R44 and R45. Under normal circumstances, the output voltage of U1 can be around 10V. This is because if KL30 is less than 10V, it is considered a deep power loss. During implementation, the VCC can be the low-voltage power supply of the charging pile during the wake-up stage and the second target power supply inside the BMS during the charging stage. In the wake-up stage, the output voltage of U1 is the first voltage; at the subsequent charging node, the output voltage of U1 is used as the third voltage.

[0092] U9 compares U1's output voltage with the voltage provided by KL30 to determine whether KL30 is in a deep power-down state. U9's output can be connected to a controller or other modules. It can be understood that when U9 outputs a high level, it indicates that KL30 is in a full power-down state; when U9 outputs a low level, it indicates that KL30 is in a deep power-down state and needs to be recharged.

[0093] In the embodiment of the present disclosure, a self-test module consisting of a voltage regulator tube and a comparator is set up to perform real-time detection on the first target power supply to accurately determine whether the first target power supply is in a deep power-loss state, and automatically start the power replenishment process when the first target power supply is in a deep power-loss state, thereby realizing an automated voltage detection and response mechanism, thereby improving the intelligence and operation efficiency of the system.

[0094] In some embodiments, the self-test module is further used to determine the first voltage based on the wake-up signal; when it is determined that the first voltage is not greater than the second voltage provided by the first target power supply, the first power signal is used as the power signal; when it is determined that the first voltage is greater than the second voltage, the second power signal is used as the power signal.

[0095] Here, the first voltage may be no greater than the voltage corresponding to the wake-up signal. The voltage corresponding to the wake-up signal refers to the voltage provided by the auxiliary power supply. In implementation, the first voltage is the minimum voltage standard that the first target power supply should reach under normal operating conditions. The first voltage can be used to determine whether the first target power supply is in a power-off state.

[0096] The second voltage is the actual output voltage value of the first target power supply detected by the self-test module. This voltage value reflects the real-time power status of the first target power supply and is an important basis for determining whether the first target power supply is in a power-deficient state.

[0097] In actual use, after the charging station is physically connected to the vehicle, the charging station's auxiliary power supply is powered on, the wake-up signal is activated, and the self-test module then begins detecting the voltage of the first target power supply (i.e., the second voltage). If the detected voltage is higher than the first voltage, the first target power supply is deemed to have sufficient charge. The self-test module generates a first charge signal, indicating that the first target power supply is in a normal state and no additional intervention is required for the first target power supply. The generation of the first charge signal means that the BMS can rely on the first target power supply for normal wake-up and communication operations without activating the high-voltage power replenishment mechanism. The generation of the first charge signal helps reduce unnecessary energy consumption and simplify the control process. By comparing the relationship between the first and second voltages, the availability of the first target power supply can be quickly determined to determine whether further action is needed, thereby improving its own intelligence and operational efficiency.

[0098] During implementation, by collecting the second voltage, the system can realize real-time monitoring of the power status of the first target power source, provide a data basis for subsequent power signal generation, and ensure that the battery management system can still operate safely under low power conditions.

[0099] When the detected first voltage is significantly greater than the second voltage, it indicates that the first target power supply is in a power-deficient state. At this time, the self-test module generates a second power signal, which serves as a prompt for subsequent processes. The generation of the second power signal triggers the power replenishment mechanism. The system uses the DC-DC module to perform low-power charging from the high-voltage battery to the first target power supply to restore the basic power supply capacity of the first target power supply. The introduction of the second power signal enables the system to automatically adjust its strategy in low-power conditions, avoiding the problem of the BMS failing to wake up normally due to insufficient first target power, thereby ensuring the continuity and stability of the entire charging process.

[0100] In the embodiment of the present disclosure, by comparing the reference voltage with the output voltage of the first target power supply, it is possible to accurately determine whether it is in a power-deficient state, thereby providing a reliable basis for subsequent wake-up strategies and improving the judgment accuracy and system response accuracy.

[0101] In some embodiments, the controller is further configured to activate the second wake-up module when the power signal is a first power signal; wherein the first power signal indicates that the first target power supply is in a full power state.

[0102] Here, the power signal may be generated by the self-test module based on the received wake-up signal. The power signal is used to reflect the current state of the first target power source. The power signal may include, but is not limited to, a first power signal and a second power signal. In implementation, the generation of the power signal and the process of the controller activating the second wake-up module can be found in the aforementioned description.

[0103] In the embodiment of the present disclosure, the second wake-up module is activated only when the first target power supply is in a non-depleted state, thereby ensuring that the system basic chip can operate stably, avoiding wake-up failure due to depletion of the first target power supply, and further improving the security and robustness of the system.

[0104] In some embodiments, the controller is further configured to control the discharge of the battery pack to charge the first target power supply when the power signal is a second power signal, and to activate the second wake-up module after charging is completed; wherein the second power signal indicates that the first target power supply is in a power-deficient state.

[0105] Here, when it is detected that the voltage of the first target power source is too low, it indicates that the first target power source is in a deep power-down state. When the first target power source is in a deep power-down state, the system relies on the battery pack to provide supplemental energy for the first target power source.

[0106] The process of discharging the battery pack to charge the first target power source typically achieves efficient energy conversion through a DC-DC circuit. The DC-DC circuit converts the high-voltage battery's DC voltage into a low-voltage DC voltage suitable for charging the first target power source, ensuring a stable and safe charging process. Furthermore, since the battery pack's own energy is used to charge the first target power source, the process does not rely on power from a charging station, eliminating the risk of electrical interference or failure from an external power source.

[0107] After charging is complete, the controller activates the secondary wake-up module to wake up the SBC and power the controller, completing the BMS's self-wake-up. This approach not only improves system autonomy but also enhances the robustness and security of the entire charging control strategy. For implementation details, see the previous section for instructions on how to activate the secondary wake-up module.

[0108] To ensure charging safety and reduce the possibility of EOS during the charging process, when the first target power supply is in a low-power state, a small amount of charging operation can be performed on the first target power supply first, and then a subsequent wake-up operation can be performed after the charging is completed. By performing the charging operation on the first target power supply, the first target power supply is no longer in a low-power state, that is, the first target power supply can provide sufficient voltage.

[0109] During implementation, first, the self-test module determines whether the first target power supply is low on power based on the wake-up signal; if it is low on power, the controller starts the power battery pack to replenish power to the first target power supply through the DCDC circuit; after the first target power supply is replenished, the second wake-up module is used to re-awaken the BMS system, thereby ensuring the continuity and safety of the charging process.

[0110] In the embodiment of the present disclosure, when it is detected that the first target power supply is in a low-power state, it is first recharged by the battery pack and then the subsequent wake-up process is continued, ensuring that normal wake-up and charging operations can be completed even when the first target power supply is insufficient, thereby improving the system's fault tolerance.

[0111] In some embodiments, the second wake-up module includes a first transistor and a second transistor, the first end of the first transistor is connected to the controller; the second end of the first transistor is connected to the first end of the second transistor; the third end of the first transistor is grounded; the second end of the second transistor is connected to the first target power supply; and the third end of the second transistor is connected to the system base chip.

[0112] Here, the first transistor and the second transistor are core electronic components that constitute the second wake-up module, respectively used for signal control and transmission. The first transistor is usually used as a switching device, and the controller provides a control signal to turn it on or off. The type of the first transistor and the second transistor can be any suitable type, such as PMOS, NMOS, etc. The type of the first transistor and the type of the second transistor can be the same or different.

[0113] The first end of the first transistor receives a control signal from the controller, and the first transistor determines whether to turn on or off its own conduction state according to the control signal.

[0114] The third terminal of the first transistor is grounded to ensure that the first transistor is in an off state when the controller does not send a control signal to the first transistor.

[0115] The second end of the first transistor is connected to the first end of the second transistor to form a signal transmission path. This connection method allows the controller to indirectly control the working state of the second transistor by controlling the conduction state of the first transistor.

[0116] The second transistor is responsible for introducing the first target power supply into the wake-up port of the SBC, thereby waking up the controller.

[0117] The second end of the second transistor is connected to the first target power supply, and the third end is connected to the power supply pin of the SBC.

[0118] During implementation, when the first transistor is activated and turned on by the controller, the second transistor is turned on, and the first target power source supplies power to the SBC through the second transistor, completing the SBC wake-up operation. This method achieves safe and controllable controller wake-up, effectively avoiding the EOS issue that may occur with traditional wake-up methods, and improving the overall stability and security of the system.

[0119] Figure 4 A schematic diagram of the circuit structure of a second wake-up module provided in an embodiment of the present disclosure is shown in FIG. Figure 4 As shown, the second wake-up module includes a first diode D1, a first capacitor C1, a second capacitor C2, a first transistor Q1, a second transistor Q2, a sixth resistor R51, a seventh resistor R52, an eighth resistor R53, a ninth resistor R54, a tenth resistor R55, and an eleventh resistor R56, wherein: When the A+ signal is enabled, the MCU sends a high level through the GPIO (i.e., MCU_IO) to turn on Q1, thereby turning on Q2, causing KL30 to enter the SBC wake-up port AO_WAK_SBC, waking up the SBC to power the controller and realize BMS self-wake-up.

[0120] In the embodiment of the present disclosure, two transistors are used to form a second wake-up module, so that the second wake-up module can realize controllable wake-up of the SBC based on the control signal sent by the controller, that is: the controller determines whether to start the working state of the second transistor by controlling whether the first transistor is on or not. When the second transistor is on, the energy of the first target power supply is transferred to the SBC and the wake-up of the SBC is completed. It can effectively isolate the high-voltage surge caused by poor insulation or close high and low voltage harnesses between the charging pile and the BMS, thereby ensuring the safety and reliability of the entire vehicle during the charging process.

[0121] In some embodiments, during the charging process, the self-test module is further used to use the first power signal as the power signal when it is determined that the third voltage is not greater than the second voltage provided by the first target power supply, and the third voltage is determined by the fourth voltage provided by the second target power supply; when it is determined that the third voltage is greater than the second voltage, the second power signal is used as the power signal; the controller is also used to control the second target power supply to charge the first target power supply when the power signal generated by the self-test module is the second power signal.

[0122] Here, the third voltage is not greater than the fourth voltage. In implementation, the third voltage is the minimum voltage standard that the first target power supply should reach under normal operating conditions, and the third voltage can be used to determine whether the first target power supply is in a power-deficient state.

[0123] The self-test module determines which type of power signal to generate by comparing the two voltages. When the third voltage is less than or equal to the second voltage, it is considered that the first target power supply has sufficient power, and the self-test module generates a first power signal, indicating that the first target power supply is in a normal state and no additional intervention is required for the first target power supply. On the contrary, when the third voltage is higher than the second voltage, it means that the first target power supply is in a power-deficient state. At this time, the self-test module generates a second power signal, prompting the BMS to recharge the first target power supply. The introduction of the self-test module not only improves the safety of the system, but also enhances the controllability and stability of the charging process.

[0124] In practical applications, the self-test module can be integrated into the BMS or deployed as a standalone functional module. For example, during the charging process, the self-test module can periodically or in real time detect the voltage status of the first target power source and, based on the detection results, determine whether to initiate the recharging process. If the first target power source is severely depleted, the battery pack will be used to recharge the first target power source to ensure a smooth charging process.

[0125] Furthermore, the self-test module can work in conjunction with other functional modules, such as the charging communication module and SBC, to achieve more intelligent and precise charging management. For example, after completing the self-test and generating the corresponding power signal, the controller can send a disconnect signal to the charging pile via the CAN bus to disconnect the A+ circuit, effectively isolating the high-voltage circuit and preventing high-voltage energy from coupling into the A+ circuit through the low-voltage wiring harness, thus ensuring the safe operation of the entire system.

[0126] During the charging process, when the controller receives the second power signal transmitted by the self-test module, it indicates that the first target power source is in a deep power-deficient state and needs to be recharged.

[0127] The secondary target power source is an energy source used to temporarily charge the primary target power source. This secondary target power source can be a low-voltage power source converted from a high-voltage battery pack. The high-voltage battery pack uses a DC-DC converter to convert high-voltage DC power to low-voltage DC power suitable for charging the primary target power source, improving system independence and safety. The secondary target power source can also be another suitable power source within the BMS that can provide a stable low voltage.

[0128] The first target power source is the device or component being charged by the second target power source. The first target power source plays a key role in vehicle startup and low-power states, so the power status of the first target power source needs to be monitored and maintained during the charging process.

[0129] During implementation, when the A+ circuit is cut off for high-voltage charging, the entire process can be: the controller reads the power signal and determines the voltage status of the first target power supply. When it is detected that the voltage of the first target power supply is low, the controller triggers the second target power supply to replenish power to the first target power supply. This method improves the autonomy and stability of the entire charging system and enhances the charging adaptability of new energy vehicles in complex environments.

[0130] In the disclosed embodiment, during the battery pack charging process, the status of the first target power supply is monitored in real time through the self-test module to further confirm whether the first target power supply needs to be charged, thereby optimizing the power management logic and improving the intelligence level of the system; and when the first target power supply is low on power, the second target power supply is started to charge it, thereby ensuring the power supply stability throughout the charging process and improving the operating efficiency and safety of the overall system.

[0131] Based on the above embodiments, the embodiments of the present disclosure further provide a charging control method. The charging control method provided by the embodiments of the present disclosure may be executed by a controller of a BMS of a vehicle. Figure 5 A schematic diagram of the implementation process of a charging control method provided in an embodiment of the present disclosure Figure 1 ,like Figure 5 As shown, the charging control method includes steps S51 to S53, wherein: Step S51: After being awakened by the wake-up signal sent by the charging pile, a disconnection signal is generated.

[0132] Here, the controller can be awakened by a wake-up module. The wake-up module can be any suitable hardware module capable of implementing this function. The wake-up module's primary function is to receive a wake-up signal from the charging station and trigger the controller to start based on the wake-up signal. The process by which the wake-up module awakens the controller can be found in the aforementioned system embodiments.

[0133] The controller may be any suitable device capable of implementing the function, such as an MCU, etc. In some embodiments, the wake-up module may directly wake up the controller through the wake-up signal, or may indirectly wake up the controller through the wake-up signal.

[0134] The disconnect signal is a signal used to control the operation of the first switch module inside the charging pile, with the purpose of disconnecting the auxiliary power supply from the BMS. In implementation, the process of generating the disconnect signal by the controller can be referred to in the aforementioned system embodiment.

[0135] Step S52: Send a disconnect signal to the charging pile; wherein the charging pile is used to disconnect the electrical connection between the auxiliary power supply of the charging pile and the battery management system in response to the disconnect signal.

[0136] Here, the controller can send the disconnect signal directly to the charging pile, or indirectly through a charging communication module. The charging communication module refers to the hardware module in the BMS used to communicate with the charging pile. The charging communication module can communicate with the charging pile via any suitable bus. In implementation, the process of the controller sending the disconnect signal to the charging pile can be referred to in the aforementioned system embodiment.

[0137] Step S53: Control the battery pack of the vehicle to be electrically connected to the high-voltage power supply of the charging pile, so that the high-voltage power supply charges the battery pack.

[0138] Here, the high-voltage power supply refers to the DC power supply in the charging station that provides charging energy to the battery pack. The method for controlling the electrical connection between the battery pack and the high-voltage power supply can be any suitable method. In implementation, the process of controlling the electrical connection between the battery pack and the high-voltage power supply by the controller can be referred to in the aforementioned system embodiments.

[0139] In the embodiment of the present disclosure, the wake-up signal of the charging pile is first activated to ensure normal charging and communication in the future; then, after being activated, a disconnection signal is generated and sent to disconnect the charging pile from its auxiliary power supply and the BMS, that is, the A+ wake-up loop is disconnected, thereby avoiding the A+ wake-up loop from being interfered with or coupled by high-voltage energy during the subsequent high-voltage charging process, preventing EOS caused by poor insulation or close proximity of high and low voltage wiring harnesses, thereby reducing the possibility of charging failure, and improving charging efficiency while also reducing the possibility of hardware damage; finally, after disconnecting the A+ wake-up loop, the high-voltage power supply is controlled to be electrically connected to the battery pack, so as to use the high-voltage power supply to charge the battery pack, thereby improving the safety and reliability of the charging process.

[0140] In some embodiments, the charging control method further includes step S50, wherein: Step S50: When the power signal generated based on the wake-up signal is the first power signal, activate the second wake-up module of the battery management system; wherein the first power signal indicates that the first target power supply is in a non-power-deficient state; the second wake-up module is used to wake up the system basic chip of the battery management system; the system basic chip is used to wake up the controller.

[0141] Here, the power signal is generated by the self-test module based on the received wake-up signal and is used to reflect the current status of the first target power source. The self-test module is a hardware module that detects the internal status of the battery system (such as voltage, current, temperature, etc.) and generates corresponding signals for other modules to determine whether the system is in normal operation. The self-test module is a functional unit in the BMS that detects and determines the status of the internal or external power supply of the system. This self-test module is primarily responsible for detecting the voltage level of the first target power source to determine whether the first target power source is in a low-power state, thereby ensuring the stability of the power supply system before the BMS self-awakens.

[0142] The power signal may include but is not limited to a first power signal, a second power signal, etc. The process of the self-test module generating the power signal may refer to the aforementioned system embodiment.

[0143] When the power signal generated by the self-test module matches the first power signal, the controller activates the second wake-up module, allowing it to wake up the SBC. Data communication exists between the self-test module and the controller. The power signal generated by the self-test module is transmitted to the controller, which then determines whether to allow the second wake-up module to activate based on the power signal. When the controller confirms that the first target power supply is in good condition, it activates the second wake-up module, which provides a safe wake-up of the SBC. The SBC is the core control unit in the BMS, responsible for managing basic power control, low-power operation, and wake-up events. The SBC typically features low-power modes, wake-up source management, and some basic communication capabilities. Before the controller is fully powered on, the SBC can take over some control tasks, thereby providing a preliminary wake-up of the BMS and preparing for subsequent controller power-up. The SBC's functionality improves system reliability and provides a backup wake-up mechanism if the external wake-up mechanism fails. The process for the controller activating the second wake-up module can be found in the aforementioned system embodiments.

[0144] In the embodiment of the present disclosure, by detecting the power status of the first target power supply and activating the second wake-up module only when the first target power supply is in a non-depleted state, it is ensured that the system basic chip can operate stably, avoiding wake-up failure caused by depletion of power in the first target power supply, and further improving the security and robustness of the system.

[0145] In some embodiments, when the power signal indicates that the first target power source is in a power-deficient state, the charging control method further includes step S54, wherein: Step S54: Control the battery pack to discharge to charge the first target power source, and activate the second wake-up module after charging is completed.

[0146] Here, when the voltage of the first target power supply is detected to be too low, it indicates that the first target power supply is in a deep power-down state. When the first target power supply is in a deep power-down state, the system relies on the battery pack to provide recharge energy to the first target power supply. In implementation, the process of the controller controlling the battery pack to charge the first target power supply and activate the second wake-up module can be seen in the aforementioned system embodiment.

[0147] In the embodiment of the present disclosure, when it is detected that the first target power supply is in a low-power state, it is first recharged by the battery pack and then the subsequent wake-up process is continued, ensuring that normal wake-up and charging operations can be completed even when the first target power supply is insufficient, thereby improving the system's fault tolerance.

[0148] In some embodiments, during the battery pack charging process, the charging control method further includes step S55, wherein: Step S55 : When the power signal generated based on the second target power source is a second power signal, control the second target power source to charge the first target power source; wherein the second power signal indicates that the first target power source is in a power-deficient state.

[0149] During the charging process, the status of the first target power source can also be monitored in real time. When the controller receives the second power level signal transmitted by the self-test module, it indicates that the first target power source is in a deep power-loss state and requires recharging. In implementation, the controller controls the second target power source to charge the first target power source, as described in the aforementioned system embodiment.

[0150] In the disclosed embodiment, the status of the first target power source is monitored in real time during the battery pack charging process, and the second target power source is started to charge it when it is low on power, thereby ensuring the power supply stability during the entire charging process and improving the operating efficiency and safety of the overall system.

[0151] The following describes the technical solution provided by the present disclosure in detail by taking the wake-up signal as the A+ signal.

[0152] In related technologies, poor insulation in charging piles or close proximity of high- and low-voltage wiring harnesses can easily cause high-voltage energy to enter the A+ wake-up circuit through coupling or crosstalk, triggering a surge and causing an EOS (Emergency Event) in the A+ wake-up circuit, leading to charging failures. This not only affects charging efficiency but can also cause irreversible damage to the BMS hardware.

[0153] An embodiment of the present disclosure provides a BMS, in which the wake-up module first activates the controller in response to the wake-up signal of the charging pile to ensure normal charging and communication in the future; then, after being activated, the controller generates and sends a disconnection signal to make the charging pile disconnect its auxiliary power supply from the BMS, that is, disconnect the A+ wake-up loop, thereby preventing the A+ wake-up loop from being interfered with or coupled by high-voltage energy during the subsequent high-voltage charging process, preventing EOS caused by poor insulation or close proximity of high and low voltage wiring harnesses, thereby reducing the possibility of charging failure, improving charging efficiency and reducing the possibility of hardware damage; finally, after disconnecting the A+ wake-up loop, the controller controls the high-voltage power supply to be electrically connected to the battery pack, so as to use the high-voltage power supply to charge the battery pack, thereby improving the safety and reliability of the charging process.

[0154] Figure 6 A schematic diagram of the structure of a battery management system provided in an embodiment of the present disclosure Figure 2 ,like Figure 6As shown, the battery management system 221 includes a wake-up module, an MCU 12 (corresponding to the aforementioned controller), a charging CAN module 131 (corresponding to the aforementioned charging communication module), a KL30 self-test module 14 (corresponding to the aforementioned self-test module), and an SBC 15. The wake-up module includes an A+ wake-up module 111 (corresponding to the aforementioned first wake-up module) and a self-wake-up module 112 (corresponding to the aforementioned second wake-up module), wherein: The A+ wakeup module 111 wakes up the SBC 15 based on the A+ signal, so as to preliminarily wake up the MCU 12 through the SBC 15; The KL30 self-test module 14 generates a reference voltage (corresponding to the aforementioned first voltage) based on the A+ signal, and generates a power signal based on the reference voltage and the voltage provided by KL30; When the power signal is the first power signal, the MCU 12 activates the self-wake-up module 112 ; The self-wake-up module 112 wakes up the SBC 15 to synchronously wake up the MCU 12 via the SBC 15; After MCU12 is awakened, a disconnect signal is generated; The charging CAN module 131 transmits the disconnection signal to the charging pile through the CAN interface.

[0155] Figure 7 A schematic diagram of the implementation process of a charging control method provided in an embodiment of the present disclosure Figure 2 ,like Figure 7 As shown, the charging control method includes steps S701 to S711, wherein: Step S701: Physical connection completed; Here, the gun is inserted to complete the physical connection between the charging pile and the entire vehicle.

[0156] Step S702: low voltage auxiliary power-on; Here, the internal relay of the charging pile is closed, the low-voltage auxiliary power supply is powered on, and the A+ signal is output.

[0157] Step S703, KL30 self-test; Here, after the charging pile is connected to the vehicle plug and the low-voltage auxiliary power-up is completed, the BMS controls the KL30 to perform a self-check. By detecting the KL30 voltage, it is determined whether the KL30 is sufficiently charged. If the voltage is normal or slightly depleted, it proceeds directly to the next step. If it is deeply depleted, the power battery pack will supplement the KL30 with a small amount of power through DCDC, and then proceed to the next step.

[0158] Step S704: Determine whether KL30 is deeply depleted. If so, proceed to step S705; if not, proceed to step S706. Step S705: The power battery pack provides a small amount of power to the KL30 via DCDC; Step S706: Charging handshake; Step S707: configuring charging parameters; Step S708: MCU enables KL30 self-wake-up; Here, after the low-voltage auxiliary power is applied, the A+ wake-up signal is activated. At this time, the MCU is always awakened by the auxiliary power supply inside the charging pile. After the charging parameters are configured and before the high voltage is applied to the charging pile, the MCU wakes itself up through the self-wake-up module.

[0159] Step S709: The charging CAN module sends a signal to the charging pile to cut off the A+ circuit.

[0160] After the MCU wakes up, it sends a command to the charging station via the charging CAN module to disconnect the relay of the low-voltage auxiliary power supply, thereby severing the low-voltage circuit. The charging station then switches to high voltage. At this point, even if the charging station has poor insulation, the energy from the high-voltage circuit cannot couple to the A+ circuit, causing EOS in the A+ circuit.

[0161] Step S710: Charging stage.

[0162] Here, the power level of the lead-acid battery can be detected in real time. If it is in a low-power state, the lead-acid battery will be replenished while charging the high-voltage battery pack; Step S711: Charging ends.

[0163] It should be noted that in the embodiments of the present disclosure, if the above method is implemented in the form of a software function module and sold or used as an independent product, it can also be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiments of the present disclosure, or the part that contributes to the relevant technology, can be embodied in the form of a software product. The software product is stored in a storage medium and includes a number of instructions for enabling an electronic device (which can be a personal computer, server, or network device, etc.) to execute all or part of the methods described in each embodiment of the present disclosure. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a magnetic disk, or an optical disk. In this way, the embodiments of the present disclosure are not limited to any specific combination of hardware and software.

[0164] The present disclosure also provides a vehicle, comprising any of the above-mentioned battery management systems.

[0165] It should be noted that the description of the vehicle embodiment above is similar to the description of the system embodiment above, and has similar beneficial effects as the system embodiment. For technical details not disclosed in the vehicle embodiment of the present disclosure, please refer to the description of the system embodiment of the present disclosure for understanding.

[0166] It should be understood that references to "one embodiment" or "an embodiment" throughout this specification mean that specific features, structures, or characteristics associated with the embodiment are included in at least one embodiment of the present disclosure. Therefore, the appearance of "in one embodiment" or "in an embodiment" throughout this specification does not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. It should be understood that in the various embodiments of the present disclosure, the order of execution of the above-mentioned processes does not necessarily indicate a precedence in execution. The execution order of each process should be determined by its function and inherent logic and should not constitute any limitation on the implementation of the embodiments of the present disclosure. The above-mentioned numbers of the embodiments of the present disclosure are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments. It should be noted that, in this document, the terms "comprise," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus comprising a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. Without further limitation, the phrase "comprises an..." does not preclude the presence of other identical elements in the process, method, article, or apparatus comprising such elements.

[0167] In the several embodiments provided in this disclosure, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are merely illustrative. For example, the division of the units described is merely a logical functional division. In actual implementation, other division methods may be used, such as: multiple units or components can be combined, or integrated into another system, or some features can be ignored or not implemented. In addition, the coupling, direct coupling, or communication connection between the components shown or discussed can be through some interfaces, and the indirect coupling or communication connection between the devices or units can be electrical, mechanical, or other forms. The units described above as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; they may be located in one place or distributed across multiple network units; some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment. In addition, the functional units in the embodiments of this disclosure may be all integrated into a single processing unit, each unit may be a separate unit, or two or more units may be integrated into a single unit; the integrated units may be implemented in the form of hardware or hardware plus software functional units.

[0168] The above is only an embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any technician familiar with the technical field can easily think of changes or replacements within the technical scope disclosed in the present disclosure, and they should all be covered by the protection scope of the present disclosure.

Claims

1. A battery management system, characterized in that: Applied in vehicles, including a wake-up module, a controller, and a charging communication module, among which: The wake-up module is configured to wake up the controller based on a wake-up signal sent by the charging pile; The controller is configured to generate a disconnect signal after being awakened; The charging communication module is configured to send the disconnection signal to the charging pile; wherein the charging pile is configured to disconnect the electrical connection between the auxiliary power supply of the charging pile and the battery management system in response to the disconnection signal, wherein the auxiliary power supply is a low-voltage power supply; The controller is further used to control the battery pack of the vehicle to be electrically connected to the high-voltage power supply of the charging pile, and the high-voltage power supply charges the battery pack.

2. The battery management system according to claim 1, characterized in that: The battery management system further includes a system basic chip and a self-test module, and the wake-up module includes a first wake-up module and a second wake-up module, wherein: The first wake-up module is configured to wake up the system basis chip based on the wake-up signal; The system basis chip is configured to initially wake up the controller after being awakened by the first awakening module; The self-test module is configured to generate a power signal based on the wake-up signal; The controller is further configured to activate the second wake-up module based on the power signal; The second wake-up module is configured to wake up the system basis chip based on a first target power supply, where the first target power supply is a low-voltage power supply; The system basis chip is further configured to synchronously wake up the controller after being awakened by the second awakening module.

3. The battery management system according to claim 2, characterized in that: The second wake-up module includes a first transistor and a second transistor, wherein: The first end of the first transistor is connected to the controller; The second end of the first triode is connected to the first end of the second triode; The third terminal of the first transistor is grounded; The second end of the second transistor is connected to the first target power supply; The third end of the second transistor is connected to the system basis chip.

4. The battery management system according to claim 2, characterized in that: The controller is further configured to activate the second wake-up module when the power signal is a first power signal; wherein the first power signal indicates that the first target power supply is in a full power state.

5. The battery management system according to claim 2, characterized in that: The controller is further configured to control the battery pack to discharge and charge the first target power supply when the power signal is a second power signal, and to activate the second wake-up module after charging is completed; wherein the second power signal indicates that the first target power supply is in a power-deficient state.

6. The battery management system according to claim 2, characterized in that: The self-test module is used to determine a first voltage based on the wake-up signal; when it is determined that the first voltage is not greater than the second voltage provided by the first target power supply, use the first power signal as the power signal; when it is determined that the first voltage is greater than the second voltage, use the second power signal as the power signal.

7. The battery management system according to any one of claims 2 to 6, characterized in that: The self-test module includes a voltage regulator and a comparator, wherein: The input end of the voltage regulator is connected to a target power supply, wherein the target power supply includes a second target power supply or the auxiliary power supply, and the second target power supply is a low-voltage power supply; The output end of the voltage regulator tube is connected to the second input end of the comparator; The first input terminal of the comparator is connected to the first target power supply; The output end of the comparator is connected to the controller.

8. The battery management system according to claim 1, characterized in that: The battery management system also includes a self-test module, which is used during the charging process of the battery pack. The controller is further configured to control the second target power supply to charge the first target power supply when the power signal generated by the self-test module is a second power signal; wherein the first target power supply is a low-voltage power supply, the second power signal indicates that the first target power supply is in a power-deficient state, and the second target power supply is a low-voltage power supply.

9. The battery management system according to claim 8, characterized in that: The self-test module is configured to use the first power signal as the power signal when it is determined that the third voltage is not greater than the second voltage provided by the first target power supply; and use the second power signal as the power signal when it is determined that the third voltage is greater than the second voltage; wherein the third voltage is determined by the fourth voltage provided by the second target power supply, the third voltage is not greater than the fourth voltage, and the first power signal indicates that the first target power supply is in a non-power-deficient state.

10. A charging control method, characterized in that: In a controller of a battery management system for a vehicle, the charging control method includes: After being awakened by the wake-up signal sent by the charging pile, a disconnect signal is generated; Sending the disconnection signal to the charging pile; wherein the charging pile is used to disconnect the electrical connection between the auxiliary power supply of the charging pile and the battery management system in response to the disconnection signal, wherein the auxiliary power supply is a low-voltage power supply; The battery pack of the vehicle is controlled to be electrically connected to the high-voltage power supply of the charging pile, and the high-voltage power supply charges the battery pack.

11. The charging control method according to claim 10, wherein: The charging control method further includes: When the power signal generated based on the wake-up signal is a first power signal, the second wake-up module of the battery management system is activated; wherein, the first power signal indicates that the first target power supply is in a non-power-deficient state, and the first target power supply is a low-voltage power supply; the second wake-up module is used to wake up the system basic chip of the battery management system; the system basic chip is used to wake up the controller.

12. The charging control method according to claim 11, wherein: When the power signal indicates that the first target power source is in a power-deficient state, the charging control method further includes: The battery pack is controlled to discharge to charge the first target power source, and the second wake-up module is activated after the charging is completed.

13. The charging control method according to any one of claims 10 to 12, characterized in that: During the charging process of the battery pack, the charging control method further includes: When the power signal generated based on the second target power supply is a second power signal, the second target power supply is controlled to charge the first target power supply; wherein the second power signal indicates that the first target power supply is in a power-deficient state and the second target power supply is a low-voltage power supply.

14. A vehicle, characterized in that: A battery management system comprising the battery management system according to any one of claims 1 to 9.

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