Charging control method, battery management system, and vehicle

Abstract

The embodiment of the present disclosure provides a charging control method, a battery management system and a vehicle, and relates to the technical field of vehicles, so as to at least solve the problems of charging failure, influence on charging efficiency, damage to hardware and the like caused by electrical overstress due to poor insulation or close proximity of high and low voltage wire harnesses of a charging pile in the related art. The battery management system comprises a wake-up module, a controller and a charging communication module. 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 disconnection signal after being woken up. The charging communication module is configured to send the disconnection signal to the charging pile. 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. The controller is further configured to control the electrical connection between the battery pack of the vehicle and the high-voltage power supply of the charging pile to be connected, and the high-voltage power supply is configured to charge the battery pack.

Description

Technical Field

[0001] This disclosure relates to, but is not limited to, the field of vehicle technology, and particularly to a charging control method, a battery management system, and a vehicle. Background Technology

[0002] With the rapid development of new energy vehicles, the application of power batteries in vehicles is becoming increasingly widespread. After the power battery is physically connected to the charging pile, the Battery Management System (BMS) is awakened by the charging pile's wake-up signal (e.g., the A+ signal) to achieve charging control and communication. However, when the charging pile has poor insulation or the high-voltage wiring harness is too close to the low-voltage wiring harness, a surge will be generated when charging the battery pack, causing electrical overstress (EOS) in the BMS's A+ wake-up circuit, resulting in charging failure. This not only affects charging efficiency but may also cause irreversible damage to the BMS hardware. Summary of the Invention

[0003] This disclosure provides a charging control method, a battery management system, and a vehicle to at least solve problems in the related art such as charging failure, reduced charging efficiency, and hardware damage caused by poor insulation of charging piles or excessively close high and low voltage wiring harnesses.

[0004] The technical solution of this disclosure embodiment is implemented as follows:

[0005] This disclosure provides a battery management system for use in a vehicle, including a wake-up module, a controller, and a charging communication module, wherein:

[0006] The wake-up module is used to wake up the controller based on the wake-up signal sent by the charging pile;

[0007] The controller is used to generate a disconnect signal after being woken up;

[0008] The charging communication module is used to send a disconnection signal to the charging pile; wherein, in response to the disconnection signal, the charging pile disconnects the electrical connection between the auxiliary power supply of the charging pile and the battery management system, and the auxiliary power supply is a low-voltage power supply.

[0009] The controller is also used to control the connection between the vehicle's battery pack and the high-voltage power supply of the charging station, so that the high-voltage power supply can charge the battery pack.

[0010] In this embodiment, the wake-up module first activates the controller in response to the wake-up signal from the charging pile to ensure normal charging and communication. Then, after activation, the controller generates and sends a disconnect signal to disconnect the charging pile's auxiliary power supply from the BMS, i.e., disconnecting the A+ wake-up circuit. This prevents the A+ wake-up circuit from being interfered with or coupled by high-voltage energy during subsequent high-voltage charging, preventing EOS (Electronic Outcome Detection) caused by poor insulation or excessive proximity of high and low voltage wiring harnesses, thereby reducing the possibility of charging failures and improving charging efficiency while also reducing the possibility of hardware damage. Finally, after disconnecting the A+ wake-up circuit, the controller controls the high-voltage power supply to connect to the battery pack to charge the battery pack using the high-voltage power supply, improving the safety and reliability of the charging process.

[0011] In some implementations, the battery management system further includes a system base chip and a self-test module. 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 woken up 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 a first target power source, which is a low-voltage power source. The system base chip is also used to synchronously wake up the controller after being woken up by the second wake-up module.

[0012] In this embodiment, on the one hand, by setting a first wake-up module and a second wake-up module to wake up the system base chip respectively, and using the system base chip to gradually wake up the controller, a phased and multi-level wake-up mechanism is realized, ensuring that the controller can still be reliably woken up even under different power states or complex environments, thereby enhancing the stability and adaptability of the system. On the other hand, by detecting the power status of the first target power supply through a self-test module, and activating the second wake-up module only when the first target power supply is not underpowered, the system base chip can be ensured to work stably, avoiding wake-up failure due to the first target power supply being underpowered, and further improving the security and robustness of the system.

[0013] In some implementations, 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.

[0014] In this embodiment, a second wake-up module is composed of two transistors. The second wake-up module enables the controllable wake-up of the system base chip based on the control signal issued by the controller. Specifically, the controller determines whether to activate the working state of the second transistor by controlling whether the first transistor is turned on or off. When the second transistor is turned on, it transfers the energy of the first target power supply to the system base chip and completes the wake-up of the system base chip. This effectively isolates high-voltage surges between the charging pile and the BMS caused by poor insulation or excessive proximity of high and low voltage wiring harnesses, thereby ensuring the safety and reliability of the vehicle during the charging process.

[0015] In some implementations, 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 non-depleted state.

[0016] In this embodiment, the second wake-up module is activated only when the first target power supply is not underpowered, thereby ensuring that the system base chip can work stably and avoiding wake-up failure due to the first target power supply being underpowered, thus further improving the system's security and robustness.

[0017] In some embodiments, the controller is further configured to control the battery pack to discharge and charge the first target power source 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 source is in a depleted state.

[0018] In this embodiment of the disclosure, when the first target power supply is detected to be in a low-power state, it is first replenished with power through the battery pack before continuing to execute the subsequent wake-up process. This ensures that even when the first target power supply is low on power, normal wake-up and charging operations can still be completed, thereby improving the fault tolerance of the system.

[0019] In some implementations, the self-test module is used to determine a first voltage based on a wake-up signal; if the first voltage is determined to be no greater than a second voltage provided by a first target power supply, the first power signal is used as the power signal; if the first voltage is determined to be greater than the second voltage, the second power signal is used as the power signal.

[0020] In this embodiment of the 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 the power supply is in a depleted state, thereby providing a reliable basis for the subsequent wake-up strategy and improving the judgment accuracy and the accuracy of the system response.

[0021] In some implementations, the self-test module includes a Zener diode and a comparator. The input terminal of the Zener diode is connected to a target power supply. The target power supply includes a second target power supply or an auxiliary power supply, wherein the second target power supply is a low-voltage power supply. The output terminal of the Zener diode is connected to the second input terminal of the comparator. The first input terminal of the comparator is connected to a first target power supply. The output terminal of the comparator is connected to a controller.

[0022] In this embodiment, a self-testing module consisting of a Zener diode and a comparator is set up to detect the first target power supply in real time, so as to accurately determine whether the first target power supply is in a deep power depletion state. When the first target power supply is in a deep power depletion state, the power replenishment process is automatically started, realizing an automated voltage detection and response mechanism, thereby improving the intelligence level and operating efficiency of the system.

[0023] In some embodiments, the battery management system further includes a self-test module. During the battery pack charging process, the controller is also used to control the second target power source to charge the first target power source when the power signal generated by the self-test module is a second power signal. The first target power source is a low-voltage power source, the second power signal indicates that the first target power source is in a depleted state, and the second target power source is a low-voltage power source.

[0024] In this embodiment of the disclosure, 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 activated to charge it when it is depleted, which ensures the power supply stability throughout the charging process and improves the overall system operating efficiency and safety.

[0025] In some implementations, the self-test module is 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 source; and to 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 source, the third voltage is not greater than the fourth voltage, and the first power signal indicates that the first target power source is in a non-depleted state.

[0026] In this embodiment of the 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 system's intelligence level.

[0027] This disclosure provides a charging control method applied in the controller of a vehicle's battery management system. The charging control method includes:

[0028] After the wake-up signal sent by the charging pile is activated, a disconnection signal is generated.

[0029] A disconnect signal is sent to the charging station; the charging station, in response to the disconnect signal, disconnects the electrical connection between its auxiliary power supply and the battery management system. The auxiliary power supply is a low-voltage power supply.

[0030] The system connects the vehicle's battery pack to the high-voltage power supply of the charging station, which then charges the battery pack.

[0031] In this embodiment, the charging pile is first activated in response to its wake-up signal to ensure normal charging and communication. Then, after activation, a disconnection signal is generated and sent to disconnect the charging pile's auxiliary power supply from the BMS, i.e., disconnecting the A+ wake-up circuit. This prevents the A+ wake-up circuit from being interfered with or coupled by high-voltage energy during subsequent high-voltage charging, preventing EOS (Electronic Outcome Detection) caused by poor insulation or excessive proximity of high and low voltage wiring harnesses, thereby reducing the possibility of charging failures and improving charging efficiency while also reducing the possibility of hardware damage. Finally, after disconnecting the A+ wake-up circuit, the high-voltage power supply is connected to the battery pack to charge it, improving the safety and reliability of the charging process.

[0032] 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-depleted 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; the system base chip is used to wake up the controller.

[0033] In this embodiment, 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 not underpowered, the system base chip can be ensured to work stably, and wake-up failure due to the first target power supply being underpowered is avoided, thereby further improving the system's security and robustness.

[0034] In some implementations, when the power signal indicates that the first target power source is in a depleted state, the charging control method further includes: controlling the battery pack to discharge and charge the first target power source, and activating the second wake-up module after charging is completed.

[0035] In this embodiment of the disclosure, when the first target power supply is detected to be in a low-power state, it is first replenished with power through the battery pack before continuing to execute the subsequent wake-up process. This ensures that even when the first target power supply is low on power, normal wake-up and charging operations can still be completed, thereby improving the fault tolerance of the system.

[0036] In some embodiments, during the battery pack charging process, the charging control method further includes: controlling the second target power source to charge the first target power source when the power signal generated based on the second target power source is a second power signal; wherein the second power signal indicates that the first target power source is in a depleted state, and the second target power source is a low-voltage power source.

[0037] In this embodiment of the disclosure, 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 activated to charge it when it is depleted, which ensures the power supply stability throughout the charging process and improves the overall system operating efficiency and safety.

[0038] This disclosure provides a vehicle including any of the above-described battery management systems.

[0039] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0040] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the specification, serve to illustrate the technical solutions of this disclosure.

[0041] Figure 1 A schematic diagram of the composition structure of a battery management system provided in this embodiment of the present disclosure. Figure 1 ;

[0042] Figure 2 This is a schematic diagram of the composition structure of a charging system provided in an embodiment of the present disclosure;

[0043] Figure 3 A schematic diagram of the circuit structure of a self-test module provided in an embodiment of this disclosure;

[0044] Figure 4 A schematic diagram of the circuit structure of a second wake-up module provided in an embodiment of this disclosure;

[0045] Figure 5 A schematic diagram of the implementation process of a charging control method provided in this embodiment of the present disclosure. Figure 1 ;

[0046] Figure 6 A schematic diagram of the composition structure of a battery management system provided in this embodiment of the present disclosure. Figure 2 ;

[0047] Figure 7 A schematic diagram of the implementation process of a charging control method provided in this embodiment of the present disclosure. Figure 2 . Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of this disclosure clearer, the disclosure will be further described in detail below with reference to the accompanying drawings. The described embodiments should not be regarded as limitations on this disclosure. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0049] In the following description, references are made to “some embodiments,” which describe a subset of all possible embodiments. However, it is 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.

[0050] In the following description, the terms “first, second, third” are used merely to distinguish similar objects and do not represent a specific ordering of objects. It is understood that “first, second, third” may be interchanged in a specific order or sequence where permitted, so that the embodiments of this disclosure described herein can be implemented in an order other than that illustrated or described herein.

[0051] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used herein is for the purpose of describing embodiments of this disclosure only and is not intended to be limiting of this disclosure.

[0052] The application of new energy batteries in daily life and industry is becoming increasingly widespread. New energy batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in aerospace and other fields. With the continuous expansion of the application fields of power batteries, the market demand is also constantly increasing. A battery can be a single battery cell. A single battery cell is a basic unit that can realize the mutual conversion of chemical energy and electrical energy, and can be used to make battery modules or battery packs to supply power to electrical devices. A single battery cell can also be a rechargeable battery, which is a battery cell that can be reactivated by charging after discharge to continue its use. Single battery 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, etc. A battery can also be a single physical module comprising one or more battery cells to provide higher voltage and capacity. When there are multiple battery cells, they are connected in series, parallel, or mixed connections through a busbar. Electrode plates are the main components of a single battery cell, directly determining the battery's electrochemical performance and safety.

[0053] With the rapid development of new energy vehicles, the application of power batteries in vehicles is becoming increasingly widespread. Currently, the charging process for power batteries is mainly as follows:

[0054] (1) Physical connection: The charging pile is physically connected to the vehicle;

[0055] (2) Wake-up: After connecting to the BMS through the auxiliary power provided by the charging pile, the BMS is powered on and woken up (i.e., A+ wake-up).

[0056] (3) Charging handshake phase: The charging pile and BMS confirm the connection status and protocol compatibility through message exchange;

[0057] (4) Charging parameter configuration: charging current, charging voltage, charging mode (e.g., constant current mode, constant voltage mode), etc.;

[0058] (5) Charging phase: The power battery is charged by the power provided by the charging pile;

[0059] (6) Charging is complete.

[0060] Therefore, when the charging pile has poor insulation or the high-voltage and low-voltage wiring harnesses are too close together, high-voltage energy can easily enter the A+ wake-up circuit through coupling or crosstalk, causing surges and resulting in an EOS (Emergency Loss) in the A+ wake-up circuit, thus leading to charging failure. This not only affects charging efficiency but may also cause irreversible damage to the BMS hardware.

[0061] This disclosure provides a battery management system. First, a wake-up module activates the controller in response to a wake-up signal from a charging pile to ensure normal charging and communication. Then, after activation, the controller generates and sends a disconnect signal to disconnect the charging pile's auxiliary power supply from the BMS, i.e., disconnecting the A+ wake-up circuit. This prevents the A+ wake-up circuit from being interfered with or coupled by high-voltage energy during subsequent high-voltage charging, preventing EOS (Electronic Outcome Disruption) caused by poor insulation or excessive proximity of high and low voltage wiring harnesses, thereby reducing the possibility of charging failures and improving charging efficiency while also reducing the possibility of hardware damage. Finally, after disconnecting the A+ wake-up circuit, the controller controls the high-voltage power supply to connect to the battery pack, using the high-voltage power supply to charge the battery pack, thus improving the safety and reliability of the charging process.

[0062] The BMS provided in this disclosure includes at least a wake-up module, a controller, and a charging communication module. These three components work together to ensure the safety and reliability of the entire charging control process. The technical solutions in this disclosure will now be clearly and completely described with reference to the accompanying drawings.

[0063] Figure 1 A schematic diagram of the composition structure of a battery management system provided in this 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:

[0064] The wake-up module 11 is used to wake up the controller 12 based on the wake-up signal sent by the charging pile;

[0065] Controller 12 is used to generate a disconnect signal after being woken up;

[0066] The charging communication module 13 is used to send a disconnection signal to the charging pile; wherein, in response to the disconnection signal, the charging pile disconnects the electrical connection between the auxiliary power supply of the charging pile and the battery management system 221.

[0067] The controller 12 is also used to control the connection between the vehicle's battery pack and the high-voltage power supply of the charging pile, so that the high-voltage power supply can charge the battery pack.

[0068] Here, the wake-up module can be any suitable hardware module capable of performing this function. The main function of the wake-up module is to receive the wake-up signal from the charging pile and trigger the controller to start based on the wake-up signal.

[0069] The wake-up signal can be the A+ signal. The A+ signal is a crucial control signal used between the charging station and the vehicle to wake up the BMS. After the user plugs in the charging gun to complete the physical connection between the vehicle and the charging station, the auxiliary power supply inside the charging station powers 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 can provide 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.

[0070] The number of wake-up modules can 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 wakes up the controller initially through the A+ signal. Initial wake-up can be a state where the controller is powered on and runs quickly. The second wake-up module may refer to a self-wake-up module, which mainly wakes up the controller deeply through a first target power supply. Deep wake-up can be a state where the controller is fully operational. The first target power supply can be any suitable low-voltage power supply inside the BMS, such as a KL30 power supply. The KL30 power supply, also known as a constant power supply, is a lead-acid battery, which is used to provide the operating voltage for the BMS and some electronic control units of the vehicle. The voltage provided by the KL30 power supply is usually 12 volts (V), 24V, etc.

[0071] In some implementations, the wake-up module can directly wake up the controller via the wake-up signal, or indirectly wake up the controller via the wake-up signal. That is, the wake-up signal can first wake up other modules, and then the other modules can wake up the controller.

[0072] The wake-up module can be integrated into the BMS. The wake-up module detects external input signals to determine whether the controller needs to be woken up, so that the controller can start the entire charging process.

[0073] Understandably, in practical implementation, the wake-up module's recognition and response mechanism to the A+ signal is the first step in the entire charging control process and a prerequisite for ensuring smooth subsequent communication and operation. If the wake-up signal is not correctly recognized, the controller may fail to start normally, thereby affecting the stability and safety of the entire charging process.

[0074] The controller can be any suitable device capable of performing this function, such as a microcontroller unit (MCU). It can be understood that this controller refers to the main control unit of the BMS, which is responsible for generating various control commands and interacting with the charging pile through the charging communication module. In essence, a controller is an electronic control unit with data processing, logical judgment, and command execution functions.

[0075] A disconnect signal is a signal used to control the operation of the first switching module inside the charging pile, with the purpose of cutting off the connection between the auxiliary power supply and the BMS. The first switching module is used to close or open the A+ circuit, which can be formed by the auxiliary power supply, the BMS, and the first switching module. The first switching module includes at least one switch, which can be a relay, contactor, etc. In some embodiments, the first switching module may include, but is not limited to, at least one of a third relay K3, a fourth relay K4, etc., where 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, after the charging pile confirms a physical connection with the vehicle, it controls K3 and K4 to close, forming the A+ circuit, so as to wake up the controller through the A+ signal provided by the auxiliary power supply; when the controller is woken up, it sends a disconnect signal to the charging pile. Based on this disconnect signal, the charging pile controls K3 and K4 to open, thus disconnecting the A+ circuit and preventing energy from the subsequent high-voltage circuit from coupling into the A+ circuit through the low-voltage wiring harness, thereby avoiding EOS (Electronic Energy Loss) causing damage to the BMS.

[0076] In some implementations, before charging, once the controller determines that the lead-acid battery has sufficient charge and has completed the self-wake-up process, it automatically generates the 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 cutting off the A+ circuit. In some implementations, if a deep lead-acid battery is detected as discharged, the disconnect signal will be sent only after recharging is completed to ensure that all preprocessing steps are finished before proceeding with subsequent charging.

[0077] The charging communication module refers to the hardware module in the BMS used for communication with the charging pile. The charging communication module can communicate with the charging pile via any suitable bus, such as 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 implementations, the charging communication module can perform a handshake communication with the charging pile via the CAN bus, transmitting charging parameters, status information, and control commands. In some implementations, the charging communication module can also be used to monitor the operating status of the charging pile in real time, ensuring that the charging pile operates within a safe range.

[0078] During implementation, the charging communication module connects to the controller and transmits the disconnect signal received from the controller to the charging pile. In practice, the controller's generation and transmission of the disconnect signal is a core component of the entire charging control strategy. By actively disconnecting from the auxiliary power supply, the influence of the subsequent high-voltage circuit on the low-voltage circuit can be effectively isolated, thereby avoiding EOS (Electronic Outcome Detection) issues caused by poor insulation and improving the overall safety and stability of the charging system.

[0079] A high-voltage power supply refers to the DC power supply used in a charging station to provide charging energy to the battery pack, typically ranging from several hundred volts to several thousand volts. The high-voltage power supply has a large output power, sufficient to meet the fast charging needs of large-capacity battery packs. In the embodiments of this disclosure, the high-voltage power supply is only activated after the A+ circuit is disconnected to ensure the safety of the charging process. In some embodiments, the charging station delays activating the high-voltage power supply after receiving a disconnection signal to prevent instantaneous surges from damaging the BMS. In some embodiments, the high-voltage power supply in certain charging stations also has an intelligent adjustment function, dynamically adjusting the output voltage and current according to the battery pack's status to optimize charging efficiency.

[0080] The method of connecting the battery pack to the high-voltage power supply can be any suitable method.

[0081] In some implementations, a target switch can be closed to establish an electrical connection between the battery pack and the high-voltage power supply. This 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 open, the high-voltage power supply stops charging the battery pack. This target switch can be a relay, contactor, etc. In practice, the controller's control of the target switch's closure marks the formal entry of the charging process into the high-voltage charging phase. By appropriately controlling the timing of the target switch's on and off, charging efficiency can be ensured while minimizing interference with the battery management system and other low-voltage systems, thereby improving the safety and reliability of the entire charging process.

[0082] In some embodiments, the BMS also includes a target switch module. The target switch can be a switch within the target switch module. The target switch module refers to an electronic switching device in the BMS used to control the on / off state of the high-voltage circuit. The high-voltage circuit can consist of a high-voltage power supply, a battery pack, and the target switch module. The target switch module can include at least one switch, which can be a relay, contactor, etc. Under the control of the controller, the target switch module can close or open the high-voltage circuit to achieve power transfer between the battery pack and the charging station. In some embodiments, the target switch module can include, but is not limited to, at least one of a fifth relay K5, a sixth relay K6, etc., where 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 practice, after the controller confirms that the A+ circuit has been successfully disconnected and all pre-charging processes have been completed, the controller controls the switch in 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 can also disconnect the high-voltage circuit through the target switch module to prevent overcharging or other abnormal situations.

[0083] In some implementations, where the BMS includes a target switch module, the controller controls the switch in the target switch module to close, connecting the battery pack to the high-voltage power supply.

[0084] In some embodiments, the charging pile also includes a second switching module for closing or opening the high-voltage circuit. The high-voltage circuit can consist of a high-voltage power supply, a battery pack, and a second switching module, or it can consist of a high-voltage power supply, a battery pack, a second switching module, and a target switching module. The second switching module includes at least one switch, which can be a relay, contactor, etc. In some embodiments, the second switching module may include, but is not limited to, at least one of a first relay K1, a second relay K2, etc. K1 is used to connect the positive terminal of the high-voltage power supply to one end of K5, and the other end of K5 is connected to the positive terminal of the battery pack. K2 is used to connect the negative terminal of the high-voltage power supply to one end of K6, and the other end of K6 is connected to the negative terminal of the battery pack. In practice, when the charging pile and BMS confirm that the charging parameters are configured or after the BMS self-wakes up, the charging pile controls K1 and K2 to close, and the controller controls K5 and K6 to close, to form a high-voltage circuit. The charging pile then converts external high-voltage AC to high-voltage DC and supplies it to the battery pack for charging.

[0085] In some implementations, where the charging station includes a second switch module, the controller can also generate a connection signal and send the connection signal to the charging station via a charging communication module. The charging station is used to control the switch in the second switch module to close in response to the connection signal, thereby connecting the battery pack to the high-voltage power supply.

[0086] Understandably, before charging, the BMS and the charging station need to perform a charging handshake and configure charging parameters.

[0087] Figure 2 This is a schematic diagram of the composition structure of a charging system provided in an embodiment of the present disclosure, as shown below. 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, wherein:

[0088] 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 the A+ circuit and transmit the A+ signal to the battery management system 221.

[0089] After the wake-up module of the battery management system 221 wakes up the controller based on the A+ signal, the controller sends a disconnection signal to the charging pile 21 through the charging communication module.

[0090] The off-board charger controller 215 controls K3 and K4 in the first switch module 214 to disconnect, thereby disconnecting the A+ circuit;

[0091] The charging pile 21 and the battery management system 221 confirm the connection status through the CC signal. 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.

[0092] The charging pile 21 and the battery management system 221 confirm the connection charging parameters via the S+ signal;

[0093] After confirming the charging parameters, the off-board charger controller 215 controls the K1 and K2 in the second switch module 213 to close, and the battery management system 221 controls the K5 and K6 in the target switch module 223 to close, so as to establish a high-voltage circuit.

[0094] The AC-DC converter 212 converts external AC power into DC power and transmits DC power to charge the battery pack 222 via a DC+ signal.

[0095] After charging is completed, the off-board charger controller 215 controls K1 and K2 in the second switch module 213 to disconnect, and the battery management system 221 controls K5 and K6 in the target switch module 223 to disconnect, so as to disconnect the high voltage circuit.

[0096] In this embodiment, the wake-up module first activates the controller in response to the wake-up signal from the charging pile to ensure normal charging and communication. Then, after activation, the controller generates and sends a disconnect signal to disconnect the charging pile's auxiliary power supply from the BMS, i.e., disconnecting the A+ wake-up circuit. This prevents the A+ wake-up circuit from being interfered with or coupled by high-voltage energy during subsequent high-voltage charging, preventing EOS (Electronic Outcome Detection) caused by poor insulation or excessive proximity of high and low voltage wiring harnesses, thereby reducing the possibility of charging failures and improving charging efficiency while also reducing the possibility of hardware damage. Finally, after disconnecting the A+ wake-up circuit, the controller controls the high-voltage power supply to connect to the battery pack to charge the battery pack using the high-voltage power supply, improving the safety and reliability of the charging process.

[0097] In some implementations, the battery management system further includes a system base chip and a self-test module. 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 woken up 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 a first target power source. The system base chip is also used to synchronously wake up the controller after being woken up by the second wake-up module.

[0098] Here, the first wake-up module can refer to the A+ wake-up module, which mainly uses the A+ signal to initially wake up the controller.

[0099] The System Basis Chip (SBC) is a low-power control chip responsible for managing system startup and basic function control. In this disclosure, the SBC, as one of the core control units of the BMS, plays a crucial role in the system wake-up process by connecting other modules to enable controller wake-up. 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 this initial operating phase, the SBC primarily performs power management and clock initialization. The SBC provides support for subsequent controller wake-up, preventing delayed wake-up from affecting the stability of the entire charging process.

[0100] 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. Upon receiving the command, the controller enters the initial running state. During the initial running phase, the controller can load only the most basic program modules, thereby reducing power consumption and accelerating response speed. This initial wake-up by the SBC ensures stable operation of the controller in subsequent operations and allows it to respond promptly to commands from the charging pile or other modules. This initial wake-up method improves the overall system's responsiveness and reliability.

[0101] The first and second wake-up modules are responsible for different wake-up paths. The first wake-up module is mainly responsible for powering on the SBC via an external wake-up signal (such as the A+ signal), and then powering on the controller via the SBC to initially wake up the controller. The second wake-up module wakes up the SBC via an internal first target power supply, and then wakes up the controller via the SBC, thereby ensuring the stability and redundancy of the system.

[0102] When the charging pile sends an A+ signal, the A+ signal is transmitted to the vehicle's BMS terminal through the charging harness. Upon receiving the A+ signal, the first wake-up module converts it into a wake-up command recognizable by the SBC. Due to its low power consumption and high response speed, the SBC can quickly enter the working state and begin executing the initial wake-up process. In some implementations, the SBC initializes some key registers and interfaces during the initial wake-up process, preparing for the subsequent full wake-up of the controller. The SBC's initial wake-up process not only reduces the overall wake-up time but also reduces energy waste caused by long waiting times.

[0103] As an intermediate wake-up node, the SBC acts as a bridge in this stage. The SBC not only receives and processes wake-up signals but also sends wake-up prompts to the controller, enabling it to quickly enter operational status. Furthermore, the SBC monitors the quality of the wake-up signal, such as voltage stability and signal integrity, ensuring a safe and reliable wake-up process. For example, in the event of fluctuations or interruptions in the A+ signal, the SBC can delay waking the controller, avoiding false triggering or incomplete wake-up behavior.

[0104] A self-test module is a hardware module used to detect the internal state of the battery system (such as voltage, current, and temperature) and generate corresponding signals for other modules to determine whether the system is in normal working condition. The self-test module is a functional unit in the BMS (Battery Management System) used to detect and judge the state of the internal or external power supply. This self-test module is mainly responsible for detecting the voltage level of the first target power supply, thereby determining whether the first target power supply is in a depleted state, and thus ensuring the stability of the power supply system before the BMS self-wakes up.

[0105] 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 state of deep power depletion. If the first target power supply is insufficient, the system may experience power instability during subsequent operations, affecting the normal operation of the BMS. By detecting the status of the first target power supply in real time through the self-test module, the system can ensure sufficient power supply before formal operation. This detection method can effectively avoid the BMS malfunctioning due to insufficient power of the first target power supply, thereby improving the stability and security of the entire system.

[0106] The power signal is generated by the self-test module based on the received wake-up signal, reflecting 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 a first power signal and a second power signal, the current state of the first target power source can be determined more accurately. This allows the control system to decide whether to initiate a charging process or adjust the charging strategy, ultimately improving the accuracy and safety of the control system's response to battery status.

[0107] The first power signal is a specific type of power signal used to characterize that the first target power source is in a non-depleted state (or not depleted state), that is, the voltage of the first target power source is within the normal range and has sufficient power supply capacity.

[0108] The second power signal is a specific type of power signal used to indicate that the first target power supply is in a depleted state. This means the voltage of the first target power supply is below a preset voltage threshold, which can be 10V, 8V, etc., and can be configured according to actual needs. A depleted state refers to the voltage of the first target power supply being below the system's set safe operating limit. When the voltage of the first target power supply is below the system's set safe operating limit, the first target power supply is insufficient to support the stable operation of the BMS, and other power supply methods are needed to supplement energy. For example, a high-voltage battery pack can supplement the first target power supply through a DC-DC converter.

[0109] During implementation, upon receiving the A+ signal, the self-test module begins detecting the voltage of the first target power supply. Based on whether the voltage of the first target power supply is higher than a reference voltage, it generates a power signal indicating the state of the first target power supply. This reference voltage is generated based on the A+ signal. This power signal can be a digital signal, which, after being acquired by the controller, is used to determine whether to proceed to subsequent operation steps. Alternatively, the power signal can be an analog signal, processed into a digital signal by other modules before being transmitted to the controller. These other modules can be any suitable module capable of converting analog signals to digital signals.

[0110] The second wake-up module, which can refer to a self-wake-up module, primarily uses the first target power supply to deeply wake up the controller. The second wake-up module is another wake-up mechanism activated by the controller after initial operation. Its function is to further wake up the SBC, allowing it to enter a deeper level of operation. The controller determines 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, ensuring the safety of the entire wake-up process. Through intelligent control of the second wake-up module, the system can respond flexibly 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 ratio.

[0111] After being activated by the controller, the second wake-up module will re-wake up the SBC based on the first target power supply. At this time, the SBC will enter a fully operational state and synchronously wake up the controller, which will then restore all its functions. This dual-layer wake-up mechanism can effectively avoid single points of failure and improve the system's fault tolerance and stability.

[0112] The first target power source refers to a stable low-voltage power source that is preferentially used in the charging system, such as the KL30 power supply. The first target power source is independent of the auxiliary power provided by the charging pile and offers higher stability and safety. In some implementations, the second wake-up module needs to be activated before the SBC can be woken up. In practice, the second wake-up module is activated when the controller receives a first power signal indicating that the first target power source is not depleted.

[0113] There is a clear collaborative relationship between the first and second wake-up modules. The first wake-up module is responsible for waking up the SBC via the A+ signal from the charging pile, thus initially waking up the controller through the SBC. The second wake-up module, on the other hand, wakes up the controller via the vehicle's own primary target power source, ensuring that the controller is awakened. The SBC plays a crucial role in both wake-up paths, receiving the wake-up signal and coordinating the subsequent wake-up process of the controller, ensuring the continuity and efficiency of the entire wake-up process.

[0114] In some implementations, since the first wake-up module has already woken up the controller, the BMS can perform charging handshake and charging parameter configuration with the charging pile during the operation of the second wake-up module. In other implementations, the BMS can perform charging handshake and charging parameter configuration with the charging pile after the second wake-up module wakes up the controller.

[0115] In implementation, after the vehicle is connected to the charging station and the physical connection is completed, the charging station first provides auxiliary power, activating the A+ signal. At this time, the BMS receives the A+ signal and begins its self-test process. Specifically, the self-test module generates a reference voltage based on the A+ signal and checks whether the voltage of the first target power source is greater than the reference voltage. If so, it generates a first charge signal, indicating that the lead-acid battery is fully charged. Subsequently, the controller activates the second wake-up module based on the first charge signal, which in turn wakes up the SBC, thereby waking up the controller via the SBC. It can be understood that the self-test performed by the self-test module based on the wake-up signal and the wake-up performed by the first wake-up module based on the wake-up signal are performed synchronously.

[0116] In this embodiment, on the one hand, by setting a first wake-up module and a second wake-up module to wake up the system base chip respectively, and using the system base chip to gradually wake up the controller, a phased and multi-level wake-up mechanism is realized, ensuring that the controller can still be reliably woken up even under different power states or complex environments, thereby enhancing the stability and adaptability of the system. On the other hand, by detecting the power status of the first target power supply through a self-test module, and activating the second wake-up module only when the first target power supply is not underpowered, the system base chip can be ensured to work stably, avoiding wake-up failure due to the first target power supply being underpowered, and further improving the security and robustness of the system.

[0117] In some implementations, the self-test module includes a Zener diode and a comparator. The input terminal of the Zener diode is connected to a target power supply. The target power supply may include a second target power supply or an auxiliary power supply. The output terminal of the Zener diode is connected to the second input terminal of the comparator. The first input terminal of the comparator is connected to a first target power supply. The output terminal of the comparator is connected to a controller.

[0118] Here, a Zener diode is an electronic component used to stabilize the voltage output. The function of a Zener diode is to convert the input voltage into a stable reference voltage output for use by subsequent circuits. The input terminal of the Zener diode is connected to the target power supply. By using a Zener diode, it can provide a stable reference voltage, which can be used in the subsequent comparator's judgment process, thus providing a basis for judgment. This ensures that the system can still obtain reliable comparison results even when the power supply voltage fluctuates, thereby effectively improving the system's stability.

[0119] The target power supply can be dynamically configured according to the charging process. For example, during the wake-up phase, the target power supply can be the auxiliary power supply of the charging pile; after the A+ circuit is disconnected, the target power supply can be the secondary target power supply inside the BMS. The secondary target power supply is a low-voltage power supply.

[0120] A comparator is an analog circuit device used to compare the magnitudes of two input signals. The output of a Zener diode serves as the second input of the comparator, providing a fixed reference voltage. The other input of the comparator is connected to a first target power supply. The comparator compares the first input voltage with the second input voltage to determine their relationship and outputs a high or low level signal for subsequent logic processing.

[0121] 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 Zener diode to determine whether the first target power supply is in a deeply depleted 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 insufficient and a charging mechanism needs to be activated. By setting the connection method between the comparator and the first target power supply, a wake-up operation can be avoided when the first target power supply is too low, preventing system abnormalities or false triggers due to insufficient power, thereby improving the controllability and safety of the entire charging process.

[0122] 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. The controller then determines whether to perform a power replenishment operation or other control strategies based on the received signal. This comparator-controller connection enables an automated voltage detection and response mechanism, thereby improving the system's intelligence and operational efficiency.

[0123] Figure 3 This is a schematic diagram of the circuit structure of a self-test module provided in an embodiment of the present disclosure, as shown below. Figure 3 As shown, the self-test module includes a Zener diode 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:

[0124] U1 can be a three-terminal programmable Zener diode. 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 KL30 is considered to be deeply depleted if it is less than 10V. In implementation, VCC can be the low-voltage power supply of the charging pile during the wake-up phase and the second target power supply inside the BMS during the charging phase. During the wake-up phase, the output voltage of U1 is the first voltage. In subsequent charging nodes, the output voltage of U1 is used as the third voltage.

[0125] U9 determines whether KL30 is in a deep-discharge state by comparing the output voltage of U1 with the voltage provided by KL30. The output of U9 can be connected to a controller or other modules. It is understood that when U9 outputs a high level, it indicates that KL30 is not in a discharged state; when U9 outputs a low level, it indicates that KL30 is in a deep-discharge state, in which case a power-up operation is required.

[0126] In this embodiment, a self-testing module consisting of a Zener diode and a comparator is set up to detect the first target power supply in real time, so as to accurately determine whether the first target power supply is in a deep power depletion state. When the first target power supply is in a deep power depletion state, the power replenishment process is automatically started, realizing an automated voltage detection and response mechanism, thereby improving the intelligence level and operating efficiency of the system.

[0127] In some implementations, the self-test module is further configured to determine a first voltage based on a wake-up signal; if the first voltage is determined to be no greater than a second voltage provided by a first target power supply, the first power signal is used as the power signal; if the first voltage is determined to be greater than the second voltage, the second power signal is used as the power signal.

[0128] Here, the first voltage may not exceed 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, this 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 depleted state.

[0129] 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 low-power state.

[0130] In practical applications, after the charging pile is physically connected to the vehicle, the auxiliary power supply of the charging pile is powered on, the wake-up signal is activated, and then the self-test module begins to detect the voltage of the first target power supply (i.e., the second voltage). If the detected voltage is higher than the first 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. The generation of the first power signal means that the BMS can rely on the first target power supply for normal wake-up and communication operations without needing to activate the high-voltage power replenishment mechanism. The generation of the first power signal helps reduce unnecessary energy consumption and simplifies the control process. By comparing the relationship between the first voltage and the second voltage, the availability of the first target power supply can be quickly determined to decide whether further measures are needed, thereby improving its intelligence level and operational efficiency.

[0131] During implementation, by acquiring the second voltage, the system can achieve real-time monitoring of the power status of the first target power source, providing a data basis for the subsequent generation of power signals and ensuring that the battery management system can still operate safely under low power conditions.

[0132] When the detected first voltage is significantly higher than the second voltage, it indicates that the first target power supply is in a low-power 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 a power replenishment mechanism. The system uses a DC-DC module to perform low-power charging from the high-voltage battery to the first target power supply to restore its basic power supply capacity. The introduction of the second power signal allows the system to automatically adjust its strategy under low power conditions, avoiding the problem of the BMS failing to wake up properly due to insufficient first target power, thus ensuring the continuity and stability of the entire charging process.

[0133] In this embodiment of the 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 depleted state, thereby providing a reliable basis for the subsequent wake-up strategy and improving the judgment accuracy and the accuracy of the system response.

[0134] In some implementations, 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 non-depleted state.

[0135] Here, the power signal can be generated by the self-test module based on the received wake-up signal. The power signal reflects the current state of the first target power supply. The power signal may include, but is not limited to, a first power signal, a second power signal, etc. In implementation, the generation of this power signal and the process by which the controller activates the second wake-up module can be found in the foregoing.

[0136] In this embodiment, the second wake-up module is activated only when the first target power supply is not underpowered, thereby ensuring that the system base chip can work stably and avoiding wake-up failure due to the first target power supply being underpowered, thus further improving the system's security and robustness.

[0137] In some embodiments, the controller is further configured to control the battery pack to discharge and charge the first target power source 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 source is in a depleted state.

[0138] Here, when the voltage of the first target power source is detected to be too low, it indicates that the first target power source is in a state of deep discharge. When the first target power source is in a state of deep discharge, the system relies on the battery pack to provide supplemental power to the first target power source.

[0139] The process of the battery pack discharging to charge the primary target power source typically achieves efficient energy conversion through a DC-DC converter circuit. The DC-DC converter transforms the high-voltage battery's DC voltage into a low-voltage DC voltage suitable for charging the primary target power source, ensuring a stable and safe charging process. Furthermore, since the battery pack itself provides the energy for charging the primary target power source, this process does not rely on a charging station, eliminating the risk of electrical interference or malfunctions that may arise from an external power source.

[0140] After charging is complete, the controller activates the second wake-up module to wake up the SBC to supply power to the controller, thus completing the BMS system's self-wake-up. This method not only enhances the system's autonomy but also strengthens the robustness and security of the entire charging control strategy. For implementation details on how the controller activates the second wake-up module, please refer to the aforementioned content.

[0141] To ensure charging safety and reduce the possibility of EOS (Effective Loss of Power) during the recharging process, when the first target power source is in a depleted state, a small-scale recharging operation can be performed on it first, followed by the subsequent wake-up operation. By recharging the first target power source, it is ensured that it is not in a depleted state, meaning that the first target power source can provide sufficient voltage.

[0142] During implementation, firstly, the self-test module determines whether the first target power source 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 the first target power source through the DCDC circuit; after the first target power source is replenished, the BMS system is re-wake up through the second wake-up module, thereby ensuring the continuity and safety of the charging process.

[0143] In this embodiment of the disclosure, when the first target power supply is detected to be in a low-power state, it is first replenished with power through the battery pack before continuing to execute the subsequent wake-up process. This ensures that even when the first target power supply is low on power, normal wake-up and charging operations can still be completed, thereby improving the fault tolerance of the system.

[0144] In some implementations, 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.

[0145] Here, the first transistor and the second transistor are the core electronic components constituting the second wake-up module, used for signal control and transmission, respectively. The first transistor typically acts as a switching device, with the controller providing a control signal to turn it on or off. The first and second transistors can be of any suitable type, such as PMOS or NMOS. The first and second transistors can be of the same or different types.

[0146] The first terminal of the first transistor receives a control signal from the controller, and the first transistor determines whether to turn its conduction state on or off based on the control signal.

[0147] The third terminal of the first transistor is grounded to ensure that the first transistor is in the off state when the controller does not send a control signal to it.

[0148] The second terminal of the first transistor is connected to the first terminal of the second transistor, forming a signal transmission path. This connection method allows the controller to indirectly control the operating state of the second transistor by controlling the conduction state of the first transistor.

[0149] The second transistor is responsible for introducing the first target power supply to the SBC's wake-up port, thereby waking up the controller.

[0150] The second terminal of the second transistor is connected to the first target power supply, while the third terminal is connected to the power supply pin of the SBC.

[0151] In implementation, when the first transistor is activated and turned on by the controller, the second transistor is also turned on. The first target power supply then supplies power to the SBC through the second transistor, thereby completing the SBC wake-up operation. This method achieves safe and controllable wake-up of the controller, effectively avoiding the EOS problem that may occur in traditional wake-up methods, and improving the overall stability and security of the system.

[0152] Figure 4 This is a schematic diagram of the circuit structure of a second wake-up module provided in an embodiment of the present disclosure, such as... 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:

[0153] When the A+ signal is enabled, the MCU sends a high-level signal through 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 supply power to the controller, thus realizing BMS self-wake-up.

[0154] In this embodiment, a second wake-up module is formed by using two transistors. The second wake-up module enables controllable wake-up of the SBC based on the control signal issued by the controller. Specifically, the controller determines whether to activate the second transistor by controlling whether the first transistor is turned on or off. When the second transistor is turned on, it transfers the energy of the first target power supply to the SBC and completes the wake-up of the SBC. This effectively isolates high-voltage surges between the charging pile and the BMS caused by poor insulation or excessive proximity of high and low voltage wiring harnesses, thereby ensuring the safety and reliability of the vehicle during the charging process.

[0155] In some embodiments, during the charging process, the self-test module is further configured to, if it is determined that the third voltage is not greater than the second voltage provided by the first target power source, use the first power signal as the power signal, wherein the third voltage is determined by the fourth voltage provided by the second target power source; if it is determined that the third voltage is greater than the second voltage, use the second power signal as the power signal; the controller is further configured to, if the power signal generated by the self-test module is the second power signal, control the second target power source to charge the first target power source.

[0156] Here, the third voltage is no greater than the fourth voltage. In practice, this third voltage is the minimum voltage standard that the first target power supply should reach under normal operating conditions. The third voltage can be used to determine whether the first target power supply is in a state of underpowerment.

[0157] The self-test module compares two voltages to determine which type of power signal to generate. When the third voltage is less than or equal to the second voltage, the first target power source is considered to have sufficient power, and the self-test module generates a first power signal indicating that the first target power source is in a normal state and no additional intervention is required. Conversely, when the third voltage is higher than the second voltage, it indicates that the first target power source is depleted, and the self-test module generates a second power signal, prompting the BMS to recharge the first target power source. The introduction of the self-test module not only improves the system's safety but also enhances the controllability and stability of the charging process.

[0158] In practical applications, the self-test module can be integrated into the BMS or deployed as a standalone functional module. For example, during charging, the self-test module can periodically or in real-time detect the voltage status of the first target power source and determine whether to initiate the charging process based on the detection results. If the first target power source is deeply depleted, the battery pack will replenish the first target power source to ensure the smooth progress of the charging process.

[0159] 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 cut off the A+ circuit, thereby effectively isolating the high-voltage circuit and preventing high-voltage energy from coupling to the A+ circuit through the low-voltage wiring harness, ensuring the safe operation of the entire system.

[0160] 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 supply is in a deep power depletion state and needs to be recharged.

[0161] The secondary target power source refers to the energy source used to provide temporary charging support for the primary target power source. The 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 the high-voltage DC power into low-voltage DC power suitable for charging the primary target power source, thus improving the system's independence and safety. Alternatively, the secondary target power source can be other suitable power sources within the BMS that can provide a stable low voltage.

[0162] The primary target power source refers to the device or component being charged by the secondary target power source. The primary target power source plays a crucial role during vehicle startup and in low-power states; therefore, its charge status needs to be monitored and maintained during the charging process.

[0163] In practice, when the A+ circuit is disconnected for high-voltage charging, the entire process can be as follows: the controller reads the power signal and determines the voltage status of the first target power source. When the voltage of the first target power source is detected to be low, the controller triggers the second target power source to replenish the first target power source. This method improves the autonomy and stability of the entire charging system and enhances the charging adaptability of new energy vehicles in complex environments.

[0164] In this embodiment of the disclosure, during the battery pack charging process, the status of the first target power supply is monitored in real time by a 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 system's intelligence level; and when the first target power supply is depleted, the second target power supply is started to charge it, ensuring the power supply stability throughout the charging process and improving the overall system's operating efficiency and safety.

[0165] Based on the above embodiments, this disclosure also provides a charging control method, which can be executed by the controller of the vehicle's BMS. Figure 5 A schematic diagram of the implementation process of a charging control method provided in this embodiment of the present disclosure. Figure 1 ,like Figure 5 As shown, the charging control method includes steps S51 to S53, wherein:

[0166] Step S51: After the wake-up signal sent by the charging pile is activated, a disconnection signal is generated.

[0167] Here, the controller can be woken up by a wake-up module. The wake-up module can be any suitable hardware module capable of performing this function. The main function of the wake-up module is to receive a wake-up signal from the charging pile and trigger the controller's startup based on that signal. The process of the wake-up module waking up the controller can be found in the aforementioned system embodiment.

[0168] The controller can be any suitable device capable of performing this function, such as an MCU. In some implementations, the wake-up module can directly wake up the controller via the wake-up signal, or indirectly wake up the controller via the wake-up signal.

[0169] A disconnect signal is a signal used to control the operation of the first switching module inside the charging pile, with the purpose of cutting off the connection between the auxiliary power supply and the BMS. In implementation, the process by which the controller generates the disconnect signal can be found in the aforementioned system embodiment.

[0170] Step S52: Send a disconnect signal to the charging pile; wherein, in response to the disconnect signal, the charging pile disconnects the electrical connection between the auxiliary power supply of the charging pile and the battery management system.

[0171] Here, the controller can send a disconnect signal directly to the charging pile, or indirectly through the charging communication module. The charging communication module refers to the hardware module in the BMS used for communication 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 a disconnect signal to the charging pile can be found in the aforementioned system embodiment.

[0172] Step S53: Connect the vehicle's battery pack to the high-voltage power supply of the charging station, and the high-voltage power supply charges the battery pack.

[0173] Here, the high-voltage power supply refers to the DC power supply in the charging pile used to provide 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 the controller controlling the electrical connection between the battery pack and the high-voltage power supply can be found in the aforementioned system embodiment.

[0174] In this embodiment, the charging pile is first activated in response to its wake-up signal to ensure normal charging and communication. Then, after activation, a disconnection signal is generated and sent to disconnect the charging pile's auxiliary power supply from the BMS, i.e., disconnecting the A+ wake-up circuit. This prevents the A+ wake-up circuit from being interfered with or coupled by high-voltage energy during subsequent high-voltage charging, preventing EOS (Electronic Outcome Detection) caused by poor insulation or excessive proximity of high and low voltage wiring harnesses, thereby reducing the possibility of charging failures and improving charging efficiency while also reducing the possibility of hardware damage. Finally, after disconnecting the A+ wake-up circuit, the high-voltage power supply is connected to the battery pack to charge it, improving the safety and reliability of the charging process.

[0175] In some embodiments, the charging control method further includes step S50, wherein:

[0176] 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-depleted state; the second wake-up module is used to wake up the system base chip of the battery management system; the system base chip is used to wake up the controller.

[0177] Here, the power signal is generated by the self-test module based on the received wake-up signal, reflecting the current state of the first target power supply. The self-test module is a hardware module used to detect the internal state of the battery system (such as voltage, current, temperature, etc.) and generate corresponding signals for other modules to determine whether the system is in normal working condition. The self-test module is a functional unit in the BMS, used to detect and judge the state of the internal or external power supply. This self-test module is mainly responsible for detecting the voltage level of the first target power supply, thereby determining whether the first target power supply is in a depleted state, and thus ensuring the stability of the power supply system before the BMS wakes up.

[0178] The power signal may include, but is not limited to, a first power signal, a second power signal, etc. The process by which this self-test module generates the power signal can be found in the aforementioned system embodiment.

[0179] When the power signal generated by the self-test module is the first power signal, the controller will activate the second wake-up module 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 determines whether to allow the second wake-up module to start based on the power signal generated by the self-test module. When the controller confirms that the first target power status is good, it will activate the second wake-up module, which achieves a safe wake-up of the SBC. The SBC is the core control unit in the BMS used to manage basic power control, low-power operation, and wake-up events. The SBC typically has low-power mode, 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 achieving initial wake-up of the BMS and preparing for subsequent controller power-up. The functions of the SBC improve system reliability, and the SBC can also provide a backup wake-up mechanism in case the external wake-up mechanism fails. In implementation, the process of the controller activating the second wake-up module can be found in the aforementioned system embodiment.

[0180] In this embodiment, 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 not underpowered, the system base chip can be ensured to work stably, and wake-up failure due to the first target power supply being underpowered is avoided, thereby further improving the system's security and robustness.

[0181] In some embodiments, when the power signal indicates that the first target power source is in a depleted state, the charging control method further includes step S54, wherein:

[0182] Step S54: Control the battery pack to discharge and charge the first target power source, and activate the second wake-up module after charging is completed.

[0183] 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 state of deep discharge. When the first target power supply is in a state of deep discharge, the system relies on the battery pack to provide replenishment 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 activating the second wake-up module can be referred to the aforementioned system embodiment.

[0184] In this embodiment of the disclosure, when the first target power supply is detected to be in a low-power state, it is first replenished with power through the battery pack before continuing to execute the subsequent wake-up process. This ensures that even when the first target power supply is low on power, normal wake-up and charging operations can still be completed, thereby improving the fault tolerance of the system.

[0185] In some embodiments, during the battery pack charging process, the charging control method further includes step S55, wherein:

[0186] Step S55: When the power signal generated based on the second target power source is the 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 depleted state.

[0187] Here, the status of the first target power source can also be monitored in real time during the charging process. When the controller receives the second power signal from the self-test module, it indicates that the first target power source is in a deep depletion state and needs to be recharged. In implementation, the process of the controller controlling the second target power source to charge the first target power source is described in the aforementioned system embodiment.

[0188] In this embodiment of the disclosure, 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 activated to charge it when it is depleted, which ensures the power supply stability throughout the charging process and improves the overall system operating efficiency and safety.

[0189] The following uses the wake-up signal A+ to illustrate the technical solution provided in this disclosure.

[0190] In related technologies, when the insulation of the charging pile is poor or the high- and low-voltage wiring harnesses are too close together, high-voltage energy can easily enter the A+ wake-up circuit through coupling or crosstalk, causing surges and resulting in an EOS (Emergency Loss) in the A+ wake-up circuit, thus leading to charging failure. This not only affects charging efficiency but may also cause irreversible damage to the BMS hardware.

[0191] This disclosure provides a Battery Management System (BMS). First, a wake-up module activates the controller in response to the wake-up signal from the charging pile to ensure normal charging and communication. Then, after activation, the controller generates and sends a disconnect signal, causing the charging pile to disconnect its auxiliary power supply from the BMS, i.e., disconnecting the A+ wake-up circuit. This prevents the A+ wake-up circuit from being interfered with or coupled by high-voltage energy during subsequent high-voltage charging, preventing EOS (Electronic Outcome Detection) caused by poor insulation or excessive proximity of high and low voltage wiring harnesses, thereby reducing the possibility of charging failures and improving charging efficiency while also reducing the possibility of hardware damage. Finally, after disconnecting the A+ wake-up circuit, the controller controls the high-voltage power supply to connect to the battery pack, so as to use the high-voltage power supply to charge the battery pack, improving the safety and reliability of the charging process.

[0192] Figure 6 A schematic diagram of the composition structure of a battery management system provided in this 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:

[0193] The A+ wake-up module 111 wakes up the SBC15 based on the A+ signal, so as to initially wake up the MCU12 through the SBC15;

[0194] 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 the KL30.

[0195] When the power signal is the first power signal, MCU12 activates the self-wake-up module 112;

[0196] The self-wake-up module 112 wakes up the SBC15 so that the MCU12 can be woken up synchronously through the SBC15;

[0197] After the MCU12 is woken up, it generates a disconnect signal;

[0198] The charging CAN module 131 transmits a disconnection signal to the charging pile via the CAN interface.

[0199] Figure 7 A schematic diagram of the implementation process of a charging control method provided in this embodiment of the present disclosure. Figure 2 ,like Figure 7 As shown, the charging control method includes steps S701 to S711, wherein:

[0200] Step S701: Physical connection completed;

[0201] Here, the charging gun completes the physical connection between the charging station and the vehicle.

[0202] Step S702: Low-voltage auxiliary power-on;

[0203] Here, the internal relay of the charging pile closes, the low-voltage auxiliary power supply is powered on, and the A+ signal is output.

[0204] Step S703, KL30 self-test;

[0205] Here, after the charging pile is connected to the vehicle's charging port and the low-voltage auxiliary power is applied, the BMS controls the KL30 to perform a self-test. By detecting the KL30 voltage, it determines whether the KL30 has sufficient power. If the voltage is normal or slightly depleted, it proceeds directly to the next step. If it is deeply depleted, the power battery pack provides a small amount of charge to the KL30 through the DC-DC converter before proceeding to the next step.

[0206] Step S704: Determine if KL30 is deeply depleted. If yes, proceed to step S705; otherwise, proceed to step S706.

[0207] Step S705: The power battery pack provides a small amount of charge to the KL30 via DC-DC converter;

[0208] Step S706, Charging handshake;

[0209] Step S707: Configure charging parameters;

[0210] Step S708: Enable KL30 self-wake-up on the MCU;

[0211] Here, after the low-voltage auxiliary power is applied, the A+ wake-up signal is activated, and the MCU is always woken up by the internal auxiliary power supply of the charging pile. After the charging parameters are configured, before the high voltage is applied to the charging pile, the MCU wakes up automatically through the self-wake-up module.

[0212] Step S709: The charging CAN module sends a signal to the charging pile to cut off the A+ circuit.

[0213] Here, after the MCU wakes up, it sends a command to the charging pile via the charging CAN module to disconnect the relay of the low-voltage auxiliary power supply, thereby cutting off the low-voltage circuit. Then, when the charging pile is connected to high voltage again, even if the charging pile has poor insulation, the energy from the high-voltage circuit cannot couple to the A+ circuit, preventing an EOS (Effect of Loss) in the A+ circuit.

[0214] Step S710, charging stage.

[0215] Here, the lead-acid battery power can be monitored in real time. If it is in a low-power state, the lead-acid battery will be replenished with power while the high-voltage battery pack is being charged.

[0216] Step S711: Charging complete.

[0217] It should be noted that, in the embodiments of this disclosure, if the above methods are implemented as software functional modules and sold or used as independent products, they can also be stored in a computer-readable storage medium. Based on this understanding, the technical solutions of the embodiments of this disclosure, or the parts that contribute to related technologies, can be embodied in the form of a software product. This software product is stored in a storage medium and includes several instructions to cause an electronic device (which may be a personal computer, server, or network device, etc.) to execute all or part of the methods described in the various embodiments of this disclosure. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), magnetic disks, or optical disks. Thus, the embodiments of this disclosure are not limited to any specific hardware and software combination.

[0218] This disclosure also provides a vehicle including any of the above-described battery management systems.

[0219] It should be noted that the description of the vehicle embodiments above is similar to the description of the system embodiments above, and has similar beneficial effects as the system embodiments. For technical details not disclosed in the vehicle embodiments of this disclosure, please refer to the description of the system embodiments of this disclosure for understanding.

[0220] It should be understood that the phrase "one embodiment" or "an embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of this disclosure. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. It should be understood that in the various embodiments of this disclosure, the sequence numbers of the above-described processes do not imply a sequential order of execution; the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this disclosure. The sequence numbers of the above-described embodiments 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 "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0221] 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 units is only a logical functional division, and in actual implementation, there may be other division methods, such as: multiple units or components can be combined, or integrated into another system, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the components shown or discussed may be through some interfaces, and the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms. The units described above as separate components may or may not be physically separated, 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 can be selected to achieve the purpose of this embodiment according to actual needs. In addition, all functional units in the embodiments of this disclosure may be integrated into one processing unit, or each unit may be a separate unit, or two or more units may be integrated into one unit; the integrated unit may be implemented in hardware or in the form of hardware plus software functional units.

[0222] The above description is merely an embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A battery management system, characterized in that, Applied in vehicles, it includes a wake-up module, a controller, and a charging communication module, wherein: The wake-up module is used to wake up the controller based on the wake-up signal sent by the charging pile; The controller is configured to generate a disconnect signal upon being woken up; The charging communication module is used to send 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, and the auxiliary power supply is a low-voltage power supply; The controller is also used to control the battery pack of the vehicle to be connected to the high-voltage power supply of the charging pile, and the high-voltage power supply charges the battery pack; 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 the wake-up signal; The system base chip is used to initially wake up the controller after being woken up 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 configured 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 a first target power supply, wherein 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 woken up by the second wake-up module.

2. The battery management system according to claim 1, characterized in that, The second wake-up module includes a first transistor and a second transistor, wherein: The first terminal 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 terminal of the first transistor is grounded; The second terminal of the second transistor is connected to the first target power supply; The third terminal of the second transistor is connected to the system base chip.

3. The battery management system according to claim 1, 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 non-depleted state.

4. The battery management system according to claim 1, characterized in that, The controller is further configured to control the battery pack to discharge and charge the first target power source when the power signal is the 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 source is in a depleted state.

5. The battery management system according to claim 1, characterized in that, The self-test module is used to determine a first voltage based on the wake-up signal; if 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; if the first voltage is greater than the second voltage, the second power signal is used as the power signal.

6. The battery management system according to any one of claims 1 to 5, characterized in that, The self-test module includes a Zener diode and a comparator, wherein: The input terminal of the Zener diode is connected to the target power supply, which includes a second target power supply or the auxiliary power supply, wherein the second target power supply is a low-voltage power supply. The output terminal of the Zener diode is connected to the second input terminal of the comparator; The first input terminal of the comparator is connected to the first target power supply; The output of the comparator is connected to the controller.

7. The battery management system according to claim 1, characterized in that, During the charging process of the battery pack, The controller is further configured to control the second target power source to charge the first target power source when the power signal generated by the self-test module is the second power signal; wherein the second power signal indicates that the first target power source is in a depleted state, and the second target power source is a low-voltage power source.

8. The battery management system according to claim 7, characterized in that, The self-test module is used to take 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 source; and to take 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 source, the third voltage is not greater than the fourth voltage, and the first power signal indicates that the first target power source is in a non-depleted state.

9. A charging control method, characterized in that, In the controller of a battery management system applied to a vehicle, the battery management system further includes a wake-up module, a system base chip, and a self-test module. The wake-up module includes a first wake-up module and a second wake-up module. The charging control method includes: After being awakened by the wake-up signal sent by the charging pile, a disconnection signal is generated. The controller is first initially awakened by the system base chip after it is awakened by the first wake-up module, and then synchronously awakened by the system base chip after it is awakened by the second wake-up module. The first wake-up module wakes up the system base chip based on the wake-up signal. The second wake-up module is activated by the controller based on a power signal before waking up the system base chip. The power signal is generated by the self-test module based on the wake-up signal. The second wake-up module wakes up the system base chip based on a first target power supply, which is a low-voltage power supply. The disconnect signal is sent to the charging pile; wherein, in response to the disconnect signal, the charging pile disconnects the electrical connection between the auxiliary power supply of the charging pile and the battery management system, and the auxiliary power supply is a low-voltage power supply; The system connects the vehicle's battery pack to the high-voltage power supply of the charging station, and the high-voltage power supply charges the battery pack.

10. The charging control method according to claim 9, characterized in that, 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-depleted state.

11. The charging control method according to claim 10, characterized in that, When the power signal indicates that the first target power source is in a depleted state, the charging control method further includes: The battery pack is controlled to discharge and charge the first target power source, and the second wake-up module is activated after charging is completed.

12. The charging control method according to any one of claims 9 to 11, 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 source is the second power signal, the second target power source is controlled to charge the first target power source; wherein, the second power signal indicates that the first target power source is in a depleted state, and the second target power source is a low-voltage power source.

13. A vehicle, characterized in that, The battery management system includes any one of claims 1 to 8.

Images