Control method and device of booster circuit in vehicle, processor and electronic equipment

Abstract

The invention discloses a control method and device for a booster circuit in a vehicle, a processor and electronic equipment. The method comprises the steps that in response to the situation that the vehicle and the power supply equipment are in a connection success state, a voltage signal of the power supply equipment is obtained, and the voltage signal is used for representing voltage corresponding to electric energy output by the power supply equipment to the vehicle; based on the voltage signal, a boost electric drive in a boost circuit of the vehicle is triggered, pre-charging operation is carried out on a boost capacitor in the boost circuit, and the voltage of the pre-charged boost capacitor is matched with the power supply equipment; in response to completion of pre-charging operation on the boost capacitor, controlling the boost circuit to perform charging operation on the energy storage equipment by using the electric energy; and in response to the completion of the charging operation on the energy storage device, the boost capacitor is subjected to a discharge operation by using the boost electric drive, and the discharged voltage of the boost capacitor is not matched with the power supply device. According to the invention, the technical problem of low control accuracy of the boost circuit in the vehicle is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle charging, in particular to a control method and device of a boost circuit in a vehicle, a processor and an electronic device. BACKGROUND

[0002] In the related art, a high-voltage platform (such as 800V or higher) is widely concerned as an important means to improve the charging efficiency and performance of a vehicle. However, the upgrade of the current charging infrastructure is not synchronized with the vehicle technology, and most direct current charging piles are still limited to an output voltage of 500V or 750V, which cannot directly meet the charging needs of the high-voltage platform vehicle. To solve the above voltage mismatch problem, the industry introduces a boost circuit as a transitional technology, which converts the lower voltage of the charging pile to the high voltage required by the vehicle battery system through the vehicle-mounted boost electric drive, thereby enhancing the charging compatibility.

[0003] However, the related control method of the boost circuit encounters challenges in actual application, especially the uncertainty of the charging pile voltage confirmation, which constitutes an obstacle to the accurate control of the boost circuit. The voltage information communication between the charging pile and the vehicle mainly relies on message exchange, and the above mechanism is not competent when facing voltage fluctuations or identification of the real output capability of the charging pile, thereby affecting the efficiency and reliability of the boost circuit. Therefore, there is still a technical problem of low control accuracy of the boost circuit in the vehicle.

[0004] At present, no effective solution has been proposed to solve the above technical problems. SUMMARY

[0005] The embodiments of the present application provide a control method and device of a boost circuit in a vehicle, a processor and an electronic device to at least solve the technical problem of low control accuracy of the boost circuit in the vehicle.

[0006] According to an aspect of the embodiments of the present application, a control method of a boost circuit in a vehicle is provided. The vehicle includes an energy storage device, and the method includes: in response to the connection between the vehicle and a power supply device being in a successful state, acquiring a voltage signal of the power supply device, wherein the voltage signal is used to represent the voltage corresponding to the electric energy output by the power supply device to the vehicle; based on the voltage signal, triggering a boost electric drive in the boost circuit of the vehicle to perform a pre-charging operation on a boost capacitor in the boost circuit, wherein the voltage of the pre-charged boost capacitor matches the power supply device; in response to completing the pre-charging operation on the boost capacitor, controlling the boost circuit to perform a charging operation on the energy storage device using the electric energy; and in response to completing the charging operation on the energy storage device, performing a discharge operation on the boost capacitor using the boost electric drive, wherein the voltage of the discharged boost capacitor does not match the power supply device.

[0007] Optionally, the voltage boosting circuit comprises a voltage boosting converter, the voltage boosting converter comprises a first voltage detection point, the voltage boosting converter comprises a first relay and a second relay, and the obtaining the voltage signal of the power supply device in response to the connection between the vehicle and the power supply device being in the successful connection state comprises: in response to the connection between the vehicle and the power supply device being in the successful connection state and the energy storage device triggering the charging request, performing a closing operation on the first relay and the second relay; and in response to the completion of the closing operation, the first relay and the second relay being in the closed state, and the voltage signal being obtained by the first voltage detection point.

[0008] Optionally, the voltage boosting circuit further comprises a direct current charging port, and the triggering the voltage boosting electric drive in the voltage boosting circuit and performing the pre-charging operation on the voltage boosting capacitor based on the voltage signal comprises: performing insulation detection on the direct current charging port to obtain a maximum insulation voltage of the direct current charging port; determining the maximum value of the maximum insulation voltage and the voltage signal as a target charging voltage of the voltage boosting capacitor; in response to the first relay and the second relay being in the closed state, controlling the voltage boosting electric drive to enter a voltage boosting pre-charging mode; and in the voltage boosting pre-charging mode, controlling the voltage boosting electric drive to perform the pre-charging operation on the voltage boosting capacitor. The method further comprises: in response to the voltage of the voltage boosting capacitor after the pre-charging operation being the target charging voltage, determining that the voltage of the voltage boosting capacitor matches the power supply device.

[0009] Optionally, the voltage boosting converter comprises a second voltage detection point, and the method further comprises: in response to the voltage of the voltage boosting capacitor obtained by the second voltage detection point reaching the target charging voltage and the voltage of the voltage boosting capacitor being in a stable voltage state, determining that the pre-charging operation on the voltage boosting capacitor is completed.

[0010] Optionally, the voltage boosting circuit comprises a voltage boosting converter, the voltage boosting converter comprises a first relay, a second relay and a second voltage detection point, and the performing the discharging operation on the voltage boosting capacitor by the voltage boosting electric drive in response to the completion of the charging operation on the energy storage device comprises: in response to the completion of the charging operation and the first relay and the second relay being in the closed state, controlling the second relay to perform an opening operation; in response to the completion of the opening operation and the second relay being in the open state, controlling the voltage boosting electric drive to enter a voltage boosting loop active discharging state; and in the voltage boosting loop active discharging state, performing the discharging operation on the voltage of the voltage boosting capacitor. The method further comprises: obtaining the voltage of the voltage boosting capacitor in the discharging operation process by the second voltage detection point; and in response to the voltage of the voltage boosting capacitor after the discharging operation being less than a target voltage threshold, determining that the voltage of the voltage boosting capacitor after the discharging operation does not match the power supply device.

[0011] Optionally, the method further comprises: in response to the voltage of the boost capacitor after performing the bleeding operation being less than the target voltage threshold, triggering a stop boost electric drive active discharge instruction, controlling the boost electric drive to exit the boost circuit active discharge state, and controlling the first relay to perform the opening operation; in response to the boost electric drive entering the boost circuit active discharge state for a target time length, and the voltage of the boost capacitor after performing the bleeding operation being greater than or equal to the target voltage threshold, controlling the first relay to perform the opening operation.

[0012] Optionally, the boost circuit comprises a first relay and a second relay, and the method further comprises: in response to an abnormality existing in the charging operation process, and the first relay and the second relay being in the closed state, controlling the second relay to perform the opening operation; in response to the second relay being in the open state after performing the opening operation, controlling the boost electric drive to enter the boost circuit active discharge state; in response to the boost electric drive entering the boost circuit active discharge state for a target time length, controlling the first relay to perform the opening operation.

[0013] Optionally, the boost circuit comprises a boost converter, and the boost converter comprises a second voltage detection point, and the method further comprises: in response to the boost electric drive being in the boost charging and heating mode, acquiring a voltage signal; in response to the voltage signal being in a stable state, and the voltage signal being the working voltage of the power supply device, controlling the boost electric drive to enter the boost charging mode; in the boost charging mode, acquiring the voltage of the boost capacitor through the second voltage detection point; in response to the voltage of the boost capacitor reaching a target charging voltage, and the voltage of the boost capacitor being in a stable state, performing boost charging on the energy storage device.

[0014] According to another aspect of the embodiments of the present application, a control device of a boost circuit in a vehicle is further provided. The device can comprise: an acquisition unit configured to acquire a voltage signal of a power supply device in response to a connection success state between the vehicle and the power supply device, wherein the voltage signal is used to represent a voltage corresponding to electric energy output by the power supply device to the vehicle; a first execution unit configured to trigger a boost electric drive in the boost circuit of the vehicle to perform a pre-charging operation on a boost capacitor in the boost circuit based on the voltage signal, wherein a voltage of the boost capacitor after pre-charging matches the power supply device; a control unit configured to control the boost circuit to perform a charging operation on an energy storage device using the electric energy in response to completing the pre-charging operation on the boost capacitor; and a second execution unit configured to perform a bleeding operation on the boost capacitor using the boost electric drive in response to completing the charging operation on the energy storage device, wherein a voltage of the boost capacitor after bleeding does not match the power supply device.

[0015] According to another aspect of the embodiments of the present application, a computer readable storage medium is further provided. The computer readable storage medium comprises a stored program, wherein the program, when executed, controls a device in which the computer readable storage medium is located to perform the above-mentioned method of the embodiments of the present application.

[0016] According to another aspect of the embodiments of the present application, a processor is also provided. The processor is configured to execute a program, wherein the program, when executed, implements the above method according to the embodiments of the present application.

[0017] According to another aspect of the embodiments of the present application, an electronic device is also provided. The electronic device comprises a memory and a processor. The memory stores a computer program, and the processor is configured to execute the computer program to implement the above method according to the embodiments of the present application.

[0018] According to another aspect of the embodiments of the present application, a computer program product is also provided. The computer program product comprises a computer program, and the computer program, when executed by a processor, implements the above method according to the embodiments of the present application.

[0019] According to another aspect of the embodiments of the present application, a vehicle is also provided. The vehicle comprises a memory and a processor. The memory stores an executable program, and the processor is configured to execute the program, wherein the program, when executed, implements the above method according to the embodiments of the present application.

[0020] In the embodiment of the present application, in response to the connection between the vehicle and the power supply device being in a successful connection state, the voltage signal of the power supply device is acquired, wherein the voltage signal is used to represent the voltage corresponding to the electric energy output by the power supply device to the vehicle; based on the voltage signal, the boost voltage in the boost circuit of the vehicle is triggered, and the pre-charging operation is performed on the boost capacitor in the boost circuit, wherein the voltage of the pre-charged boost capacitor matches the power supply device; in response to completing the pre-charging operation on the boost capacitor, the boost circuit is controlled to perform the charging operation on the energy storage device using the electric energy; and in response to completing the charging operation on the energy storage device, the boost capacitor is discharged using the boost voltage, wherein the voltage of the discharged boost capacitor does not match the power supply device. That is, in this embodiment, the voltage signal of the power supply device is actively acquired and analyzed at the first time when the vehicle and the power supply device are successfully connected, ensuring the accuracy of the charging pile voltage information. Subsequently, the pre-charging process of the boost capacitor is intelligently controlled by the boost voltage, the boost capacitor voltage is accurately matched with the output voltage of the charging pile, and the problem of low charging efficiency caused by voltage mismatch is eliminated. After the pre-charging is completed, the boost circuit can efficiently convert and transmit the electric energy to the energy storage device of the vehicle, realizing stable charging. More importantly, after the charging is completed, the boost capacitor is quickly and safely discharged through fine adjustment, avoiding the risk of residual high voltage, and greatly enhancing the overall safety and controllability of the boost circuit. In summary, the core technical scheme of the present application solves the technical problem of low control accuracy of the boost circuit in the vehicle through accurate voltage signal analysis and control strategy, promotes the maturity and development of high-voltage platform vehicle charging technology, solves the technical problem of low control accuracy of the boost circuit in the vehicle, and achieves the technical effect of improving the control accuracy of the boost circuit in the vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0021] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0022] Figure 1 is a flow chart of a control method of a boost circuit in a vehicle according to an embodiment of the present application;

[0023] Figure 2 is a schematic diagram of a boost circuit according to an embodiment of the present application;

[0024] Figure 3 is a boost charging power-on timing diagram according to an embodiment of the present application;

[0025] Figure 4 is a boost charging power-off timing diagram according to an embodiment of the present application;

[0026] Figure 5is a schematic view of a control device of a boost circuit in a vehicle according to an embodiment of the present application. DETAILED DESCRIPTION

[0027] In order to make the persons skilled in the art better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work should belong to the protection scope of the present application.

[0028] It should be noted that the terms "first", "second", and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or a chronological sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units need not be limited to only those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0029] According to an embodiment of the present application, an embodiment of a control method of a boost circuit in a vehicle is provided. It should be noted that the steps shown in the flowchart of the drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described herein can be executed in an order different from that shown herein.

[0030] Figure 1 is a flowchart of a control method of a boost circuit in a vehicle according to an embodiment of the present application, as shown in Figure 1 The method can include the following steps:

[0031] Step S102, in response to the connection between the vehicle and the power supply device being in a successful state, obtaining a voltage signal of the power supply device.

[0032] In the technical solution provided in the above step S102 of the present application, the vehicle includes an energy storage device. The voltage signal can be used to represent the voltage corresponding to the electric energy output by the power supply device to the vehicle.

[0033] Optionally, the power supply device can refer to an external device that provides charging power for a vehicle (e.g., an electric vehicle). The power supply device can refer to a charging pile (or pile end). The charging pile is a key component of the electric vehicle charging infrastructure, which can output power of different voltages and currents according to the charging needs of the vehicle. In the embodiments of the present application, the power supply device is not limited to the charging pile, and theoretically any device that can provide charging power for the vehicle can be regarded as the power supply device.

[0034] Optionally, the energy storage device can refer to the on-board battery system of the vehicle, which can be referred to as the power battery. The function of the energy storage device is to store power to facilitate the driving of the electric vehicle. The battery system is composed of multiple battery units and can adopt different chemical systems and energy densities. In the embodiments of the present application, the energy storage device specifically refers to the battery system inside the vehicle and is the main source of energy for the electric vehicle.

[0035] Optionally, the connection success state refers to the state in which the physical connection and electrical connection between the vehicle and the power supply device (e.g., the charging pile) are established, and the communication protocol between them has successfully handshake, and the power transmission can begin. In the electric vehicle charging scenario, the physical connection is completed by inserting the charging gun into the vehicle charging port, and the electrical connection and communication protocol handshake are achieved through the electrical signal and data message interaction of both parties.

[0036] Optionally, the voltage signal can refer to the information of the voltage size of the power output by the power supply device (charging pile). In the charging process, the voltage signal is one of the key data exchanged between the charging pile and the vehicle, which is used to guide the boost circuit to adjust its operation to match the output voltage of the charging pile. The voltage signal can be the voltage value directly output by the charging pile, or the voltage value measured by the vehicle through its voltage detection point (e.g., B terminal), which is used to verify whether the output voltage of the charging pile meets the expectation.

[0037] In this embodiment, if the vehicle and the power supply device are in the connection success state, the voltage signal of the power supply device can be obtained.

[0038] Optionally, in the process of judging that the vehicle and the power supply device are in a connection success state, the charging port of the vehicle physically contacts the charging gun of the power supply device (charging pile), ensuring the basic condition of electrical connection. The charging pile detects the connection state of the charging gun and the vehicle charging port, and judges whether the electrical connection is established by detecting whether the contacts of the charging gun correctly contact the corresponding contacts of the vehicle charging port. Once the physical connection is established, the charging pile and the vehicle start the handshake process of the communication protocol. This can involve exchanging initial messages between the two parties to confirm the compatibility of the communication format and protocol version. During the handshake process, the charging pile sends its charging capacity and parameters to the vehicle through messages, including the maximum output voltage, current, and possible charging mode. At the same time, the vehicle also reports its current state to the charging pile through messages, including the State of Charge (SOC) of the battery, the maximum acceptable charging voltage and current of the battery, and other information. The vehicle performs insulation monitoring to check whether the insulation state of the vehicle charging circuit meets the safety standards to ensure that no electrical accidents occur during charging.

[0039] Optionally, if all the above conditions are met, i.e. the physical, electrical, and communication connections are established, and both parties confirm the charging parameters and the state of the vehicle, it is considered that the vehicle and the power supply device are in a connection success state. At this time, the vehicle can obtain the voltage signal of the power supply device through the B-end voltage detection point to further confirm the actual output voltage of the charging pile.

[0040] Optionally, in the process of obtaining the voltage signal of the power supply device, after the connection success state is confirmed, the vehicle starts the B-end voltage detection point, which can monitor the voltage output by the charging pile in real time. The vehicle reads the voltage value output by the charging pile through the B-end voltage detection point, and the above voltage signal directly reflects the voltage of the charging pile output to the vehicle, providing an important basis for subsequent pre-charging of the boost capacitor and charging control. The vehicle controller analyzes the received voltage signal to ensure that the output voltage of the charging pile is consistent with the voltage capacity confirmed through the message previously, avoiding charging abnormalities caused by voltage mismatch. Once the accuracy of the voltage signal is confirmed, the vehicle will feed back this signal to the control module of the boost circuit as a trigger condition for performing pre-charging of the boost capacitor.

[0041] In the embodiments of the present application, the above method ensures that the connection state between the vehicle and the power supply device can be accurately judged before charging begins, and the voltage signal of the power supply device can be accurately obtained, providing accurate voltage information for pre-charging of the boost capacitor and charging control in the subsequent charging process, thereby improving the accuracy and safety of the entire charging process.

[0042] Step S104, based on the voltage signal, triggering the boost electric drive in the boost circuit of the vehicle to perform pre-charging operation on the boost capacitor in the boost circuit.

[0043] In the technical solution provided in the step S104 of the application, the voltage of the pre-charged boost capacitor matches the power supply device.

[0044] Optionally, the boost circuit can be a combination of power electronic devices. The basic function of the voltage circuit is to convert the voltage to a higher level through the transformation of the circuit when the input voltage is relatively low. In the application scenario of electric vehicle charging, the boost circuit is mainly used to convert the low-voltage direct current provided by the charging station (power supply device) into a voltage suitable for the high-voltage battery system of the vehicle to meet the charging needs of the high-voltage platform vehicle.

[0045] Optionally, the boost electric drive can also be referred to as a three-phase boost electric drive. The boost capacitor can be a key energy storage element in the boost converter of the boost circuit. The boost capacitor functions to store electrical energy during the boost process to stabilize the voltage and assist the boost electric drive in completing voltage conversion. Before charging begins, the boost capacitor is pre-charged to a level matching the output voltage of the power supply device to ensure that the voltage between the boost circuit and the power supply device is consistent, thereby improving charging efficiency and safety.

[0046] Optionally, the pre-charging operation can refer to a series of charging activities performed on the boost capacitor before the formal boost charging begins, with the purpose of raising the voltage of the boost capacitor to an ideal value matching the output voltage of the power supply device. The above process is controlled by the boost electric drive, which gradually raises the lower voltage of the charging pile to the capacity that the boost capacitor can withstand through the Buck circuit mode, thereby avoiding impact or damage to the circuit when high voltage is directly applied.

[0047] Optionally, the voltage of the boost capacitor can refer to the potential difference across the boost capacitor. In the pre-charging operation, the voltage of the boost capacitor gradually rises until it matches the output voltage of the power supply device (charging pile). The voltage establishment process of the boost capacitor is an important link in the entire boost charging control process, directly affecting whether the boost circuit can work smoothly and the efficiency and safety of the charging process. The voltage of the boost capacitor can be the voltage of the A-end voltage detection point.

[0048] In this embodiment, after obtaining the voltage signal of the power supply device, the boost electric drive in the boost circuit of the vehicle can be triggered based on the voltage signal to perform a pre-charging operation on the boost capacitor, so that the voltage of the pre-charged boost capacitor matches the power supply device.

[0049] Optionally, during the process of analyzing the voltage signal, the control system of the vehicle, such as the Battery Management System (BMS) or the Vehicle Control Unit (VCU), receives the voltage signal obtained from the power supply device or the B-point voltage detection point. In the above step, the voltage signal is converted into digital information for subsequent processing and control.

[0050] Optionally, during the process of determining the pre-charge target voltage, the control system compares the obtained voltage signal with the voltage requirement of the high-voltage system of the vehicle, and confirms the pre-charge target voltage, i.e., the voltage value that the boost capacitor needs to reach. The above target voltage should match the output voltage of the power supply device to ensure voltage consistency during the charging process.

[0051] Optionally, during the process of controlling the relay state, before the pre-charge starts, the control system of the vehicle enables the S1 and S2 relays in the boost circuit to establish electrical connection between the power supply device and the boost capacitor, creating conditions for pre-charge operation. The vehicle control system issues an instruction to enable the boost electric drive to enter the pre-charge mode. In this mode, the boost electric drive starts charging the boost capacitor through the buck circuit, aiming to raise the voltage of the boost capacitor to a level matching the power supply device.

[0052] Optionally, during the process of monitoring the voltage of the boost capacitor, the control system of the vehicle continuously monitors the voltage at point A in the boost circuit, i.e., the real-time voltage of the boost capacitor. This is achieved through a voltage sensor to ensure accurate voltage control during the pre-charge process. During the pre-charge process, the control system dynamically adjusts the pre-charge strategy of the boost electric drive based on the voltage feedback of the boost capacitor, including adjusting the size of the pre-charge current and the length of the pre-charge time, to ensure that the voltage of the boost capacitor can smoothly and efficiently reach the target voltage matching the power supply device.

[0053] Optionally, when the voltage of the boost capacitor reaches the target voltage matching the power supply device through the pre-charge operation and stabilizes within a certain tolerance range, the control system can determine that the pre-charge operation is complete. After the pre-charge operation is complete, the vehicle control system enables the boost electric drive to switch from the pre-charge mode to the boost charging mode. At this time, the boost electric drive converts the electrical energy provided by the power supply device into high-voltage electrical energy through the corresponding circuit, and starts charging the high-voltage energy storage device of the vehicle.

[0054] In the embodiment of the present application, through the above method, it is ensured that the voltage of the boost capacitor can accurately match the output voltage of the power supply device during the charging process, thereby improving the charging efficiency, reducing the power loss during charging, and ensuring the safety and compatibility of the charging process. The above process embodies the important application of power electronic control technology in the charging scene of electric vehicles. Through fine voltage management and control strategy, the charging experience of high-voltage platform vehicles is significantly improved.

[0055] In step S106, in response to the completion of the pre-charging operation on the boost capacitor, the boost circuit is controlled to perform a charging operation on the energy storage device using electrical energy.

[0056] In the technical solution of step S106 of the present application, the charging operation can be a boost charging operation, which can be a boost circuit that starts to convert the electrical energy provided by the power supply device to a voltage level suitable for charging the vehicle high-voltage energy storage device. The above process begins with the completion of capacitor pre-charging, which means that the boost circuit is ready for efficient and safe energy conversion during the charging process.

[0057] In this embodiment, after triggering the boost electric drive to perform a pre-charging operation on the boost capacitor based on the voltage signal, the boost circuit can be controlled to perform a charging operation on the energy storage device using electrical energy.

[0058] Optionally, the vehicle control system checks the status of the boost capacitor to confirm whether the pre-charging operation has been completed, i.e., whether the voltage of the boost capacitor has been adjusted to the target voltage matching the output voltage of the power supply device (charging pile). When it is confirmed that the pre-charging operation is completed and the boost capacitor has reached the target voltage, the control system sends a mode switching instruction to the boost electric drive, instructing it to switch from the pre-charging mode to the boost charging mode.

[0059] Optionally, in response to the mode switching instruction, the boost electric drive activates the Boost circuit in the boost circuit to start performing a boost operation. The above operation converts the lower voltage provided by the power supply device to a voltage level suitable for charging the vehicle high-voltage energy storage device.

[0060] Optionally, the boost circuit starts to receive electrical energy from the power supply device and uses the converted high-voltage electrical energy to charge the vehicle's high-voltage energy storage device (such as a power battery). At this time, the electrical connection between the boost circuit and the high-voltage energy storage device is maintained by the relay S1.

[0061] Optionally, during the charging process, the vehicle control system continuously monitors the working state of the boost circuit and the charging state of the high-voltage energy storage device, including but not limited to voltage, current, temperature, etc. Based on the monitoring results, the control system can dynamically adjust the output parameters of the boost circuit, such as charging voltage and current, to ensure charging efficiency and safety, and avoid overcharging or overdischarging, etc.

[0062] Optionally, when the high-voltage energy storage device reaches a predetermined state of charge (such as a SOC requirement), the control system issues an instruction to terminate the boost charging operation, disconnects the relay S1, and ends the charging process. If any abnormal situation occurs during the charging process (such as overheating, overvoltage), the control system will immediately intervene, which may include stopping the boost power drive, disconnecting the S1 relay, starting the boost capacitor discharge, and other emergency measures to protect the vehicle system and personnel safety.

[0063] Step S108, in response to the completion of the charging operation on the energy storage device, the boost power drive is used to perform a discharge operation on the boost capacitor.

[0064] In the technical solution of step S108 of the present application, the voltage of the discharged boost capacitor is not matched with the power supply device.

[0065] Optionally, the discharge operation refers to the energy release process performed by the boost power drive on the boost capacitor after the completion of the charging operation. The purpose of the above-mentioned discharge operation is to reduce the voltage in the boost capacitor to a safe level or a voltage that is not matched with the battery system, ensuring the safety and stability of the vehicle electrical system.

[0066] Optionally, the boost capacitor will be pre-charged to a high-voltage state that matches the output voltage of the power supply device during the charging process, which helps the boost charging process to proceed smoothly. Once the charging operation is completed, the electrical energy stored in the boost capacitor needs to be safely released to avoid safety hazards such as electric shock risk, circuit damage, etc. caused by residual high-voltage electrical energy. At the same time, reducing the voltage of the boost capacitor to a state that is not matched with the power supply device can prevent the boost circuit from being started again in unexpected situations, further ensuring system safety.

[0067] Optionally, by enabling the boost power drive to enter an active discharge mode, the internal circuit (such as a discharge resistor or discharge circuit) is used to consume the electrical energy stored in the boost capacitor, so that its voltage is reduced to below a safe threshold, such as 60V or lower. The above-mentioned safe threshold is set according to electrical safety standards. The boost capacitor can also be naturally discharged through the built-in discharge resistor, but the active discharge operation can ensure a faster and more controllable voltage drop, especially in emergency disconnect charging, collision, and other conditions that require a quick response.

[0068] Optionally, after the completion of the charging operation, the vehicle control system continuously monitors the voltage of the boost capacitor. Once the voltage level is monitored, the boost power drive is enabled to perform a discharge operation to consume the electrical energy in the capacitor through a controlled discharge circuit or discharge resistor. The control system can continuously monitor the voltage drop process of the boost capacitor, and stop the discharge operation of the boost power drive when the voltage drops to a safe level or meets a specific condition (such as a voltage that is not matched with the power supply device).

[0069] In this embodiment, after the control boost circuit performs the charging operation on the energy storage device using electrical energy, the boost capacitor can be discharged using the boost electrical drive, so that the voltage of the discharged boost capacitor is not matched with the voltage of the power supply device.

[0070] Optionally, the control system of the vehicle continuously monitors the charging status of the high-voltage energy storage device (power battery), including SOC, voltage, temperature and other parameters. When it is detected that the charging operation of the energy storage device has been completed, i.e. the preset charging capacity or SOC threshold is reached, the control system prepares to perform the discharge operation.

[0071] Optionally, in response to the signal of the completion of the charging, the control system sends an instruction to the boost electrical drive, instructing it to switch from the boost charging mode to the discharge mode of the boost capacitor. To perform the discharge operation, the control system first disconnects the relay S1 in the boost circuit, cutting off the electrical connection between the boost capacitor and the high-voltage energy storage device, ensuring that the discharge operation does not affect the energy storage device. At the same time, it is confirmed whether the relay S2 has been disconnected, which is to ensure that the charging port is completely isolated from the outside world, avoiding interaction with the power supply device during the discharge process.

[0072] Optionally, the boost electrical drive enters an active discharge state, starting to consume the electrical energy stored in the boost capacitor through its internal discharge circuit or discharge resistor, so that its voltage drops. During the discharge operation, the vehicle control system continuously monitors the voltage drop of the boost capacitor to ensure that its voltage drop speed meets the safety and efficiency requirements.

[0073] Optionally, when the voltage of the boost capacitor drops to a level that is not matched with the voltage of the power supply device, usually below the safe voltage threshold (e.g. below 60V), the control system detects this state. Once the predetermined voltage level is reached, the control system sends an instruction to stop the active discharge state of the boost electrical drive, completing the discharge operation. It is confirmed that the voltage of the boost capacitor has been safely lowered and is not matched with the voltage of the power supply device, preventing the impact or other electrical problems caused by the voltage difference when attempting to charge next time. The completion of the discharge operation is recorded, including the voltage data before and after the discharge, the operation time, etc. These information can be used for future maintenance, fault diagnosis, and provide reference for subsequent charging process.

[0074] The above steps S102 to S108 of the application, in response to the connection between the vehicle and the power supply device being in a successful state, obtain the voltage signal of the power supply device, wherein the voltage signal is used to represent the voltage corresponding to the electric energy output by the power supply device to the vehicle; based on the voltage signal, trigger the boost voltage drive in the boost circuit of the vehicle to perform pre-charging operation on the boost capacitor in the boost circuit, wherein the voltage of the pre-charged boost capacitor matches the power supply device; in response to completing the pre-charging operation on the boost capacitor, control the boost circuit to perform charging operation on the energy storage device using the electric energy; in response to completing the charging operation on the energy storage device, perform discharge operation on the boost capacitor using the boost voltage drive, wherein the voltage of the discharged boost capacitor does not match the power supply device. That is, in this embodiment, the voltage signal of the power supply device is actively obtained and analyzed at the first time when the vehicle and the power supply device are successfully connected, to ensure the accuracy of the charging pile voltage information. Subsequently, the pre-charging process of the boost capacitor is intelligently controlled by the boost voltage drive, the boost capacitor voltage is accurately matched with the output voltage of the charging pile, and the problem of low charging efficiency caused by voltage mismatch is eliminated. After pre-charging, the boost circuit can efficiently convert and deliver electric energy to the energy storage device of the vehicle, achieving stable charging. More importantly, after charging is completed, the boost capacitor is quickly and safely discharged through fine adjustment, avoiding the risk of residual high voltage, and greatly enhancing the overall safety and controllability of the boost circuit. In summary, the core technical scheme of the application solves the technical problem of low control accuracy of the boost circuit in the vehicle through precise voltage signal analysis and control strategy, promotes the maturity and development of high-voltage platform vehicle charging technology, solves the technical problem of low control accuracy of the boost circuit in the vehicle, and achieves the technical effect of improving the control accuracy of the boost circuit in the vehicle.

[0075] The above method of this embodiment will be further introduced below.

[0076] As an optional embodiment, the boost circuit includes a boost converter, the boost converter includes a first voltage detection point, the boost converter includes a first relay and a second relay, and step S102 of obtaining the voltage signal of the power supply device in response to the connection between the vehicle and the power supply device being in a successful state includes: in response to the connection between the vehicle and the power supply device being in a successful state and the energy storage device triggering a charging request, performing closing operation on the first relay and the second relay; and in response to completing the closing operation, the first relay and the second relay are in a closed state, the first voltage detection point is used to obtain the voltage signal.

[0077] In this embodiment, the boost converter can be a power electronic device in the boost circuit, and the main function of the boost converter is to convert the input lower DC voltage into a higher DC voltage output, which is suitable for the charging demand of high-voltage power supply system of electric vehicles, etc. The boost converter can be a first relay, a second relay, a boost capacitor, and a first voltage detection point.

[0078] Optionally, the first voltage detection point (which can be voltage detection point B) can be a designated position on the boost converter, and the first voltage detection point can be used to monitor the input voltage or the voltage of a node in the boost circuit in real time. During the boost charging process, the actual output voltage of the power supply device (charging pile) is confirmed to ensure that it matches the voltage requirement of the vehicle high-voltage system, thereby improving the charging efficiency and safety.

[0079] Optionally, the relay can be an electronic control device in the boost converter, which uses a smaller current or voltage to control a larger current or voltage circuit to realize signal transmission and conversion, thereby realizing remote control, automatic control, etc. The functions of the first relay (S1) and the second relay (S2) are to connect or disconnect the circuit between the boost converter and the power supply device and the high-voltage energy storage device, thereby ensuring the smooth progress of the charging process and the safety of the disconnection process.

[0080] Optionally, the closing operation can refer to the process of converting the relay in the electronic circuit from the open state (i.e., the non-conductive state) to the closed state (i.e., the conductive state). In the boost charging system, the closing operation means that the contacts of the first relay (S1) and the second relay (S2) are in contact to form a complete circuit so that the current can pass through. The closed state can refer to the relay or switch in the circuit being in the conductive state, allowing the current to flow freely between its contacts. In the boost charging system, when the first relay (S1) and the second relay (S2) are in the closed state, the circuit between the boost converter and the power supply device and the high-voltage energy storage device forms a closed loop, and the charging process can be started or continued.

[0081] Optionally, during the process of obtaining the voltage signal of the power supply device, if the vehicle and the power supply device are in a connected successful state, and the energy storage device triggers a charging request, the closing operation can be performed on the first relay and the second relay. After the closing operation is completed and the first relay and the second relay are in the closed state, the voltage signal can be obtained by using the first voltage detection point.

[0082] Optionally, the vehicle system continuously monitors the connection status of the vehicle and the power supply device (such as a charging pile), and confirms whether it is in a successful connection state. At the same time, it is detected whether the high-voltage energy storage device (power battery) sends a charging request, which is a necessary condition for starting the boost charging process. In response to the successful connection state and the charging request, the control system sends a command to close the first relay (S1) and the second relay (S2) to establish a complete boost circuit. Ensure that the S1 and S2 relays are attracted to form a circuit path from the power supply device to the boost converter and then to the high-voltage energy storage device, preparing for the boost charging process.

[0083] Optionally, after the S1 and S2 relays are closed, the voltage signal of the power supply device is monitored in real time through the first voltage detection point (point B). The obtained voltage signal is used to confirm the actual output voltage of the power supply device, which is a key step in the charging process, ensuring that the power supply voltage matches the voltage requirements of the vehicle high-voltage system.

[0084] In the embodiment of the present application, through the closing operation and voltage signal acquisition, the system can dynamically adapt to the voltage output of different power supply devices, even if the power supply voltage is lower than the requirements of the vehicle high-voltage system, it can be effectively adjusted through the boost converter, to ensure the smooth progress of the charging process. The closing operation and voltage signal monitoring provide necessary safety control points for subsequent boost capacitor pre-charging and boost charging. After the charging is completed, the system can quickly disconnect the S1 and S2 relays, and start the voltage discharge of the boost capacitor, to ensure the safety of the charging interface and the vehicle electrical system. Real-time voltage monitoring of the first voltage detection point (point B) can help the system accurately judge the actual capacity of the power supply device, avoid the loss of charging efficiency caused by voltage mismatch, and thus realize a more efficient charging process. By precisely controlling the state of S1 and S2 relays, the stability and controllability during the charging process are ensured, and problems caused by electrical faults or misoperations are reduced.

[0085] As an optional embodiment, the boost circuit further includes a direct current charging port, and the step S104 includes: based on the voltage signal, triggering a boost electric drive in the boost circuit to perform a pre-charging operation on a boost capacitor in the boost circuit, including: performing insulation detection on the direct current charging port to obtain a maximum insulation voltage of the direct current charging port; determining the maximum value of the maximum insulation voltage and the voltage signal as a target charging voltage of the boost capacitor; in response to the first relay and the second relay being in a closed state, controlling the boost electric drive to enter a boost pre-charging mode; in the boost pre-charging mode, controlling the boost electric drive to perform the pre-charging operation on the boost capacitor; and the method further includes: in response to the voltage of the boost capacitor after performing the pre-charging operation being the target charging voltage, determining that the voltage of the boost capacitor matches the power supply device.

[0086] In this embodiment, the DC charging port can be a physical interface on the electric vehicle for receiving DC power from an external power supply device for charging. The DC charging port can include multiple electrical connection points to support the transmission of current and communication signals. In addition to providing an electrical energy input path, the DC charging port also has an insulation detection function that can verify the electrical isolation of the charging circuit and its connection to the vehicle body before charging begins, ensuring electrical safety during the charging process.

[0087] Optionally, the maximum insulation voltage can refer to the maximum voltage value measured when the DC charging port performs insulation detection with the vehicle body. The above detection can be initiated by the power supply device during the charging handshake phase to evaluate the insulation performance of the charging interface. The determination of the maximum insulation voltage helps to determine whether the charging port can safely withstand the charging voltage about to be performed, and is a key indicator to ensure electrical safety during the charging process. Insulation detection can infer the insulation performance of the charging circuit by injecting a small amount of voltage into the circuit and measuring the leakage, thereby determining whether it is safe to perform large current charging.

[0088] Optionally, the target charging voltage is determined based on the actual output voltage of the power supply device and the maximum insulation voltage of the DC charging port, and is used to determine the voltage value of the boost capacitor in the vehicle's boost circuit during pre-charging. The target charging voltage is the larger of the power supply voltage signal and the maximum insulation voltage, ensuring that the boost capacitor can provide sufficient voltage support during the charging process, while not exceeding the safe bearing range of the charging port. Reasonable setting of the target charging voltage can optimize charging efficiency, reduce energy loss during charging, and provide additional protection against electrical accidents caused by excessive voltage.

[0089] Optionally, the boost pre-charge mode is a working mode of the boost power driver. The purpose of the boost pre-charge mode is to pre-charge the voltage of the boost capacitor to the target charging voltage before formal charging, creating suitable starting conditions for the subsequent boost charging process. In the boost pre-charge mode, the boost power driver controls the internal circuit (such as the Buck circuit) to extract power from the power battery or the power supply device, gradually increasing the voltage of the boost capacitor until the target charging voltage is reached. The boost pre-charge mode can effectively prevent current surges caused by mismatch between the voltage of the boost capacitor and the voltage of the power supply at the moment the charging begins, protecting the circuit components from damage. In addition, pre-charging to the target charging voltage can ensure smooth operation of the boost circuit during the boost charging process, improving charging efficiency.

[0090] Optionally, during the pre-charging operation of the boost capacitor, insulation detection can be performed on the DC charging port to obtain the maximum insulation voltage. The maximum value of the insulation voltage and the voltage signal can be determined as the target charging voltage of the boost capacitor. After the first relay and the second relay are both in the closed state, the boost electric drive can be controlled to enter the boost pre-charging mode. In the boost pre-charging mode, the boost electric drive can be controlled to perform the pre-charging operation on the boost capacitor, so that the voltage of the boost capacitor after the pre-charging operation is the target charging voltage.

[0091] Optionally, after the vehicle is successfully connected with the power supply device (such as a charging pile), insulation detection can be automatically performed on the DC charging port, which is usually a standard safety check initiated by the power supply device. The electrical isolation performance of the charging port is detected to ensure that there is no risk of leakage or short circuit between the charging port and the vehicle body during the charging process. The maximum insulation voltage of the DC charging port is obtained, and the above-mentioned maximum insulation voltage reflects the highest voltage that the charging port can safely withstand.

[0092] Optionally, the voltage signal of the power supply device and the maximum insulation voltage of the DC charging port are compared, and the larger one is selected as the target charging voltage of the boost capacitor. The target charging voltage is set to match the actual output capability of the power supply device, while also ensuring that it does not exceed the safe voltage threshold of the charging port. The above-mentioned setting can improve the charging efficiency while ensuring electrical safety and avoiding circuit damage or safety risks caused by voltage overload.

[0093] Optionally, during the control of the boost electric drive to enter the boost pre-charging mode, if it is confirmed that the first relay (S1) and the second relay (S2) are in the closed state, i.e., the boost circuit has been connected, the system enables the boost electric drive to enter the boost pre-charging mode. In the pre-charging mode, the boost electric drive gradually raises the voltage of the boost capacitor to the target charging voltage as the starting condition for boost charging. Through the pre-charging operation, the current shock caused by voltage mismatch when boost charging starts can be avoided, protecting the circuit and the capacitor from damage, while ensuring the smooth progress of the charging process.

[0094] Optionally, in the boost pre-charging mode, the boost electric drive is controlled to perform the pre-charging operation on the boost capacitor to make its voltage reach the target charging voltage. After the pre-charging operation is successful, the voltage of the boost capacitor matches the output voltage of the power supply device, providing a smooth and safe starting point for the subsequent boost charging process, optimizing the charging efficiency and safety.

[0095] Optionally, the voltage of the boost capacitor after the pre-charging operation is monitored to confirm whether the target charging voltage has been reached. The voltage of the boost capacitor is ensured to match the power supply device, laying a foundation for the smooth progress of the boost charging process. After the voltage matching is confirmed, the boost charging can be smoothly started, avoiding low charging efficiency or electrical safety problems caused by voltage mismatch.

[0096] As an optional embodiment, the boost converter comprises a second voltage detection point, and the method further comprises: determining that the pre-charging operation on the boost capacitor is completed in response to the voltage of the boost capacitor obtained by the second voltage detection point reaching the target charging voltage and the voltage of the boost capacitor being in a stable voltage state.

[0097] In this embodiment, the second voltage detection point can be voltage detection point A. The second voltage detection point can be another key voltage monitoring point in the boost converter and can be used to directly monitor the voltage across the boost capacitor. The second voltage detection point is located near the boost capacitor and can provide real-time and accurate capacitor voltage information. The main function of voltage detection point A is to monitor the voltage state of the boost capacitor in real time during the boost pre-charging and boost charging processes. The reading of voltage detection point A is an important basis for the control system to determine whether the boost capacitor pre-charging is completed and whether the voltage is stable, and is directly related to the safety and efficiency of the subsequent charging process.

[0098] Optionally, the stable voltage state can refer to the voltage across the boost capacitor reaching the target charging voltage, experiencing fluctuations for a period of time, and finally remaining in a constant or slightly fluctuating range without large fluctuations. In the boost charging system, the stable voltage state is a key to ensuring charging safety and efficiency. It indicates that the boost capacitor has been successfully pre-charged to the target voltage, and the charging system has reached an equilibrium point and can continuously supply stable voltage to provide reliable power supply for subsequent boost charging or vehicle operation. The determination of the stable voltage state is usually based on the continuous monitoring of voltage detection point A. The control system sets a time threshold for voltage stability and a voltage fluctuation amplitude threshold. When the voltage of the boost capacitor is maintained near the target voltage for a certain period of time and the fluctuation does not exceed the allowed range, it is determined that the stable voltage state is reached.

[0099] Optionally, if the voltage of the boost capacitor reaches the target charging voltage and the voltage of the boost capacitor is in a stable voltage state (stable state), it can be determined that the pre-charging operation on the boost capacitor is completed.

[0100] Optionally, during the boost capacitor pre-charging operation, the control system (usually the vehicle controller) continuously monitors the voltage state across the boost capacitor through the second voltage detection point (voltage detection point A). The key points are to monitor whether the voltage reaches the preset target charging voltage and whether the voltage remains in a stable state.

[0101] Optionally, when the voltage of the boost capacitor is monitored to be close to or equal to the target charging voltage, the next determination step can be entered. Ensuring that the boost capacitor has been pre-charged to the required voltage level provides the necessary conditions for the next step of boost charging. Even if the voltage has reached the target charging voltage, the system needs to further determine whether the voltage is in a stable state. This means that the voltage not only reaches the target value, but also fluctuates around this value without much fluctuation, meeting the standard of a stable voltage state. The control system can set a certain voltage fluctuation range and a stable time threshold. Only when the voltage fluctuates around the target charging voltage within the allowed range and continuously maintains this state for more than a preset time, can the voltage be considered stable.

[0102] Optionally, once it is confirmed that the voltage of the boost capacitor reaches the target charging voltage and the voltage is in a stable state, the vehicle control unit will determine that the pre-charging operation is completed. This marks that the boost capacitor is ready for the next step of boost charging, ensuring smooth start of the boost charging process, while avoiding the current impact and circuit damage that may be caused by unstable voltage.

[0103] Optionally, after the pre-charging operation is confirmed to be completed, the switch is switched to the boost charging preparation phase, which may involve controlling the boost electric drive to switch from the pre-charging mode to the boost charging mode. At this time, the voltage of the boost capacitor matches the output voltage of the power supply device, providing a stable voltage basis for subsequent high-voltage charging.

[0104] As an optional embodiment, the boost circuit includes a boost converter, the boost converter includes a first relay, a second relay, and a second voltage detection point, and step S108, in response to the completion of the charging operation of the energy storage device, the boost capacitor is executed by the boost electric drive. The discharge operation includes: in response to the completion of the charging operation and the first relay and the second relay being in a closed state, controlling the second relay to perform an opening operation; in response to the completion of the opening operation, the second relay is in an open state, and the boost electric drive is controlled to enter a boost loop active discharge state; in the boost loop active discharge state, the voltage of the boost capacitor is discharged; the method further comprises: acquiring the voltage of the boost capacitor during the discharge operation by the second voltage detection point; in response to the voltage of the boost capacitor after the discharge operation being less than the target voltage threshold, it is determined that the voltage of the boost capacitor after the discharge operation is not matched with the power supply device.

[0105] In this embodiment, the disconnection operation can refer to the process of placing one or both of the originally closed first relay (S1) and second relay (S2) in the boost circuit into a disconnected state, specifically in the context of the embodiment of the present application, it refers to controlling the second relay (S2) to perform the disconnection action. After the charging operation of the energy storage device is completed, in order to ensure electrical safety and meet the needs of subsequent operations, it is necessary to disconnect some key nodes in the circuit to quickly reduce the voltage in the charging interface and the circuit to a safe level. By disconnecting the second relay (S2), the direct connection between the boost capacitor and the external power supply device is cut off, prompting the voltage discharge process to start. The disconnection operation can quickly and effectively cut off the charging circuit, prevent high-voltage current from flowing to unsafe paths in the event of an emergency or at the end of charging, and reduce electrical safety hazards.

[0106] Optionally, the boost loop active discharge state can refer to a state in which, in the boost converter, by controlling the boost electric drive (which can be an inverter or other power converter), the electrical energy stored in the boost capacitor is discharged in a controlled manner, reducing the capacitor voltage below a safe threshold. The design of the active discharge state is to ensure that the residual energy in the boost circuit is consumed or transferred in a timely and safe manner after charging is completed or in an emergency, avoiding the risk of electric shock or other electrical safety problems caused by residual high voltage. After entering the boost loop active discharge state, the boost electric drive reduces the voltage of the boost capacitor to below the target voltage threshold through specific circuit operations (such as short-circuit discharge or conversion of electrical energy into heat energy consumption). This process is monitored by the vehicle controller, and once the target is reached, the active discharge state will be closed to avoid over-discharge.

[0107] Optionally, the target voltage threshold refers to a pre-set upper limit of voltage in an electrical system to ensure the safety of operating personnel or to meet regulatory requirements. In the embodiment of the present application, the above-mentioned target voltage threshold can be set to 60V. The setting of the target voltage threshold is based on electrical safety standards and human body electric shock protection considerations. In many electrical applications, 60V is widely regarded as a relatively safe voltage level for human contact. When the voltage of the boost capacitor is reduced to below 60V by active discharge, i.e. below the target voltage threshold, it can be confirmed that the voltage in the boost circuit has been reduced to a safe level, making subsequent operations (such as plugging in and out of the charging gun, vehicle maintenance, etc.) more safe and reliable, while also meeting the requirements of relevant electrical safety regulations.

[0108] Optionally, the whole process of voltage discharge is monitored by the second voltage detection point (voltage detection point A). The voltage of the boost capacitor is ensured to be reduced as expected, and at the same time, abnormal situations are monitored. The voltage of the boost capacitor is continuously monitored until the voltage drops below the target voltage threshold. The target voltage threshold is assumed to be 60V, and when the voltage of the boost capacitor is lower than 60V, the system confirms that the voltage discharge operation has been completed. The target voltage threshold is set to ensure electrical safety, and once this threshold is reached, it can be confirmed that the voltage in the charging related circuit has been reduced to a safe level, avoiding the risk of electric shock or other electrical safety risks.

[0109] Optionally, after confirming that the S2 relay has been disconnected, the system controls the boost electric drive to enter the active discharge state of the boost circuit. The purpose of the active discharge state is to release the high-voltage electrical energy stored in the boost capacitor in a controlled manner, preventing high voltage from remaining at the charging port and ensuring safety. The boost electric drive converts the energy in the boost capacitor into other forms (such as heat energy) through internal circuits, thereby achieving a rapid drop in voltage. In the active discharge state of the boost electric drive, the system continues to perform the voltage discharge operation of the boost capacitor. The voltage of the boost capacitor gradually decreases until it reaches a safety threshold, i.e. the target voltage threshold.

[0110] Optionally, during the entire voltage discharge process, the second voltage detection point (voltage detection point A) continuously monitors the voltage change of the boost capacitor. Ensure that the voltage of the boost capacitor can be reduced as expected, while monitoring for abnormal situations. The voltage of the boost capacitor is continuously monitored until the voltage drops below the target voltage threshold. The target voltage threshold is assumed to be 60V, and when the voltage of the boost capacitor is lower than 60V, the system confirms that the voltage discharge operation has been completed. The target voltage threshold is set to ensure electrical safety, and once this threshold is reached, it can be confirmed that the voltage in the charging related circuit has been reduced to a safe level, avoiding the risk of electric shock or other electrical safety risks.

[0111] Optionally, when the voltage of the boost capacitor drops below the target voltage threshold, it is determined that this voltage state does not match the output voltage of the power supply device. The above confirmation step is necessary because it indicates that the boost circuit has actively reduced the voltage to a safe level and no longer maintains a high voltage connection with the power supply device, creating safe conditions for subsequent operations (such as safely unplugging the charging gun, vehicle maintenance, etc.).

[0112] As an optional embodiment, the method further comprises: in response to the voltage of the boost capacitor after performing the bleed operation being less than the target voltage threshold, triggering a stop boost active discharge instruction, controlling the boost electric drive to exit the boost circuit active discharge state, and controlling the first relay to perform the disconnection operation; in response to the boost electric drive entering the boost circuit active discharge state for a target duration, and the voltage of the boost capacitor after performing the bleed operation being greater than or equal to the target voltage threshold, controlling the first relay to perform the disconnection operation.

[0113] In this embodiment, the stop boost active discharge instruction can be a control signal sent by the vehicle controller, instructing the boost electric drive to exit the boost circuit active discharge state and terminate the voltage bleed operation on the boost capacitor. When it is monitored that the voltage of the boost capacitor has dropped below the target voltage threshold, i.e. below 60V in this scenario, the vehicle controller will trigger this instruction. This ensures that the system can stop the active discharge state in time after reaching a safe voltage level, preventing excessive voltage drop or unnecessary energy waste, and also providing conditions for the next operation (such as disconnecting the first relay S1). Through precise voltage monitoring and control logic, the safety and efficiency of the electrical system are ensured, avoiding the risk of capacitor damage or functional failure caused by excessive discharge.

[0114] Optionally, the target duration can refer to the maximum time set for the boost electric drive to perform the active discharge operation after entering the boost circuit active discharge state. In this scenario, the target duration is set to 2 seconds. The setting of the target duration is based on a comprehensive consideration of the voltage bleed speed of the boost capacitor and the safety of the circuit. The above target duration can be a protection mechanism to ensure that the active discharge operation is completed within a limited time, avoiding circuit failure that may be caused by indefinite discharge. If the voltage of the boost capacitor has not dropped below the target voltage threshold within the target duration (e.g. 2 seconds), i.e. the voltage is still greater than or equal to 60V, the system will execute the instruction to control the first relay (S1) to disconnect, forcibly stopping the high-voltage current path in the circuit. This indicates that even if the boost electric drive fails to bleed the voltage to a safe level within the expected time, the system can still ensure electrical safety by disconnecting S1. The setting of the target duration needs to consider the parameters of the boost capacitor, the discharge efficiency of the boost electric drive, and the requirements of specific electrical safety standards, to ensure that the established safety target can be achieved in various situations.

[0115] Optionally, the whole vehicle controller continuously monitors the voltage of the boost capacitor after the discharge operation. Once it finds that the voltage has dropped below the target voltage threshold (e.g. 60V), it takes immediate action. A stop boost electric drive active discharge command is triggered, which causes the boost electric drive to exit the boost circuit active discharge state and controls the first relay (S1) to perform a disconnection operation. The above response ensures that the system automatically stops the active discharge process after reaching a safe voltage level, preventing unnecessary energy loss in the circuit, and also to avoid any potential circuit damage or safety risks caused by excessive discharge. Through precise voltage monitoring and immediate control feedback, the system can efficiently and safely manage the voltage level of the boost circuit, ensuring the safety of users and maintenance personnel, while reducing energy waste.

[0116] Optionally, when the boost electric drive enters the boost circuit active discharge state, the system simultaneously monitors the duration of the above state until a preset target time length (e.g. 2 seconds) is reached. If the voltage of the boost capacitor is still greater than or equal to the target voltage threshold (60V) at the end of the target time length, the system will take further measures. The first relay (S1) is controlled to perform a disconnection operation, which immediately cuts off the high-voltage connection between the charging interface and the vehicle main circuit, even if the boost electric drive fails to reduce the voltage of the boost capacitor below a safe level within the specified time. The above decision-making mechanism is part of the system's safety strategy, aiming to immediately reduce electrical risks through hard-wired disconnection, even if the active discharge process does not complete as expected. The above settings enhance the safety and reliability of the system, ensuring that in any situation, the system can quickly take action to reduce the safety risks in a high-voltage environment.

[0117] In the embodiments of the present application, by monitoring the voltage and discharge time, double protection of electrical safety in the high-voltage charging system is achieved. In normal circumstances, the boost electric drive's active discharge capability is relied on to reduce the voltage of the boost capacitor to a safe level, while in abnormal or emergency situations, the set target time length and the forced disconnection of the first relay S1 ensure that the system can respond in the shortest time and cut off the high-voltage circuit, thereby maximizing the safety of the electrical system and the safety of the operator. This control logic reflects the deep consideration and meticulous management of safety in modern electric vehicle charging systems, and is an indispensable safety mechanism for high-voltage platform technology.

[0118] As an optional embodiment, the voltage boosting circuit includes a first relay and a second relay, and the method further comprises: in response to an abnormality existing in the charging operation process and the first relay and the second relay being in a closed state, controlling the second relay to perform an opening operation; in response to the second relay being in an open state after the opening operation is completed, controlling the voltage boosting electric drive to enter a voltage boosting loop active discharge state; and in response to a duration of the voltage boosting electric drive entering the voltage boosting loop active discharge state reaching a target duration, controlling the first relay to perform an opening operation.

[0119] In this embodiment, during the charging operation process, if any type of abnormal condition is detected, such as sudden disconnection of the charging gun, vehicle collision event, etc., the vehicle controller will immediately intervene. The vehicle controller first confirms whether the first relay (S1) and the second relay (S2) are both in a closed state, which is a prerequisite to ensure that the current circuit is still connected to the external power supply device. Once it is confirmed that S1 and S2 are both closed, the vehicle controller will quickly control the second relay (S2) to perform an opening operation to disconnect the voltage boosting capacitor from the charging facility, which is to immediately reduce the voltage at the charging port to prevent possible electrical hazards.

[0120] Optionally, after the second relay (S2) completes the opening operation and is in an open state, the vehicle controller controls the voltage boosting electric drive to enter a voltage boosting loop active discharge state. The active discharge state is started to further reduce the voltage stored in the voltage boosting capacitor, ensuring that even if the connection of the charging facility has been disconnected, the residual voltage in the voltage boosting circuit can be quickly reduced to a safe level. After the voltage boosting electric drive enters the discharge state, the electrical energy stored in the voltage boosting capacitor is consumed in a controlled manner, such as by converting the electrical energy into heat energy through an internal resistance, or by releasing the electrical energy to the outside of the system through other circuit paths.

[0121] Optionally, the duration of the voltage boosting electric drive in the active discharge state is monitored, and once the duration reaches a preset target duration (e.g., 2 seconds), the system controls the first relay (S1) to perform an opening operation. The target duration is usually based on the discharge capacity of the circuit and safety standards, aiming to ensure that in an emergency, the electrical system can complete all necessary safety measures within a limited time. By setting the target duration, even if the active discharge process fails to reduce the voltage to a safe level within the specified time, the system can immediately disconnect the voltage boosting circuit from the vehicle main loop by opening the S1 relay, further ensuring electrical safety and personnel safety.

[0122] As an optional embodiment, the boost circuit includes a boost converter, and the boost converter includes a second voltage detection point. The method further includes: in response to the boost electric drive being in the boost charging and heating mode, obtaining a voltage signal; in response to the voltage signal being in a stable state and the voltage signal being the operating voltage of the power supply device, controlling the boost electric drive to enter the boost charging mode; in the boost charging mode, obtaining the voltage of the boost capacitor through the second voltage detection point; and in response to the voltage of the boost capacitor reaching a target charging voltage and the voltage of the boost capacitor being in a stable state, performing boost charging on the energy storage device.

[0123] In this embodiment, in the boost charging and heating mode, the boost electric drive is in an operating state, but the main purpose is to maintain the battery temperature through the electrothermal effect rather than direct charging. At this time, the system still needs to monitor the circuit state to ensure that various parameters meet the safety and efficiency standards. Through the second voltage detection point (point A), the boost converter continuously obtains a voltage signal, which reflects the current voltage state of the boost capacitor. The voltage signal is monitored to confirm whether the voltage of the boost capacitor is stable and meets the preset conditions for subsequent entry into the charging mode.

[0124] Optionally, it is checked whether the obtained voltage signal is in a stable state, and it is confirmed whether the stable voltage is equal to the operating voltage of the power supply device. If the monitored voltage signal meets both conditions, i.e., it is stable and equal to the operating voltage of the power supply device, the vehicle controller will control the boost electric drive to switch from the boost charging and heating mode to the boost charging mode. The above condition judgment mechanism ensures smooth transition from the heating mode to the charging mode, avoiding low charging efficiency or safety problems caused by unstable voltage or mismatch with the voltage of the power supply device.

[0125] Optionally, in the boost charging mode, the second voltage detection point (point A) continues to work and real-time obtains the voltage data of the boost capacitor. The voltage of the boost capacitor is continuously monitored to ensure that it always matches the target charging voltage and is in a stable state during the boost charging process, so as to maintain high charging efficiency.

[0126] Optionally, it is judged whether the voltage of the boost capacitor has reached the target charging voltage and whether the voltage state is stable. When both conditions are met, the system will perform boost charging on the energy storage device (such as a power battery) and transmit the high-voltage electrical energy in the boost capacitor to the battery through the boost converter for charging. The selection of the target charging voltage needs to match the maximum output voltage of the power supply device and the charging voltage specification of the battery to ensure the effectiveness and safety of the charging process.

[0127] In the embodiments of the present application, the above method can ensure that the conversion from the boost charging and heating mode to the boost charging mode is both safe and efficient. In the heating mode, by monitoring the voltage signal of the boost capacitor, it is confirmed that it is in a stable state and equal to the working voltage of the power supply device, which is the precondition for switching to the charging mode. Once the voltage signal meets the condition, the system immediately responds and controls the boost electric drive to enter the charging state, optimizing the start stage of the charging process. In the charging mode, the voltage of the boost circuit is continuously monitored to ensure that the voltage of the boost capacitor is stable and reaches the target charging voltage, which is an important guarantee for effective charging. When the voltage of the boost capacitor reaches the target charging voltage and is stable, the system performs boost charging on the energy storage device, fully utilizes the advantages of high-voltage charging, and provides fast and efficient charging service.

[0128] The technical solutions of the embodiments of the present application will be illustrated below in conjunction with preferred embodiments.

[0129] At present, in the background of the acceleration of electric vehicles, high-voltage platform technology (800V, 1000V system) has become the clear development direction of the industry because it can significantly improve the charging efficiency and shorten the energy supplement time. Compared with the traditional 400V system, the 800V platform not only raises the working voltage of the power battery to a higher range, but also puts forward new requirements for the voltage resistance level of the vehicle-mounted electric drive system, thermal management and other components.

[0130] However, the upgrading speed of the charging infrastructure lags far behind the iteration of the whole vehicle technology. The output voltage of the mainstream direct current fast charging pile on the market is generally limited to 500V or 750V level due to the early design standard, and cannot directly meet the charging needs of high-voltage vehicles through the traditional direct current charging method. This voltage mismatch problem not only restricts the release of the charging performance of high-voltage vehicles, but also causes the gap between the actual experience of users and the theoretical fast charging capacity. In order to bridge this key gap, the industry is introducing a boost circuit as a transitional technical solution. At present, three-phase drive electric drive is generally used for direct current to direct current boost conversion, which converts the low voltage platform voltage output by the charging pile into a high voltage platform voltage to supplement the power battery. Thus, without relying on the comprehensive transformation of the charging pile, the supplement compatibility of the high-voltage platform vehicle is improved.

[0131] The embodiments of the present application will be further introduced below.

[0132] Figure 2 is a schematic diagram of a boost circuit according to the embodiments of the present application, like Figure 2As shown, the boost circuit can include a power battery, a boost motor, a boost converter and a DC charging port. The power battery can include K1 relay, K2 relay. The boost converter can include S1 relay, S2 relay, boost capacitor, voltage detection point A and voltage detection point B. In the technical background of the above boost charging, it is necessary to isolate the high-voltage loop into two loops, and there are mature voltage establishment, discharge and safety protection strategies for the main loop of the high-voltage platform. But for the boost loop side, it is still in exploration. In order to better realize the boost charging function and at the same time meet the requirements of relevant mandatory regulations. The simplified boost circuit is composed of a power battery, a three-phase boost motor, a boost converter and a DC charging port. Among them, the power battery is a high-voltage platform power battery with a maximum voltage greater than 750V, which cannot be charged by a 750V / 400V DC charging pile on the market; the boost motor has driving ability, boost capacitor charging ability through buck circuit, power battery boost charging ability through corresponding circuit, main loop active discharge ability and boost loop active discharge ability, and also has boost charging power calculation and request ability. The boost converter has boost capacitor, A and B two voltage detection points (such as Figure 1 ), passive discharge resistor, voltage stabilization circuit and voltage detection circuit (not shown in the figure). K1, K2, K3, K4, S1 and S2 are high-voltage relays.

[0133] Optionally, when the DC charging gun is connected, the pile end and the vehicle end only interact through messages, which may cause inaccurate charging voltage confirmation. Voltage detection point B can monitor the pile end output voltage in real time, providing a redundant option for charging voltage confirmation. Before the DC charging starts, the boost capacitor in the boost converter needs to be pre-charged to the target charging voltage by the motor, which is used to match with the charging pile, so as to make the boost charging proceed smoothly. After the boost charging is completed, the voltage in the boost capacitor needs to be discharged by the motor to ensure the safety of electricity use. In the case of unexpected disconnection of the charging gun, fault stop charging, collision and other conditions that require emergency shutdown of the charging port high-voltage loop, S2 can quickly cut off the boost circuit and external connection.

[0134] Figure 3 is a boost charging power-up timing diagram according to an embodiment of the present application, as Figure 3As shown, when the DC charging pile is inserted and the battery has a charging request, the high-voltage system needs to first complete the main loop power-on. After the main loop power-on is completed, the boost converter is enabled to close the voltage detection loop to continuously monitor the voltage at point B. During the handshake process between the charging pile and the vehicle, the charging pile will perform insulation monitoring on the DC charging port. Generally, the insulation monitoring voltage is the maximum output voltage of the pile end. At this time, the vehicle needs to record the maximum insulation voltage value monitored this time. During the handshake process between the charging pile and the vehicle, the charging pile will also send the charging pile output voltage capability to the vehicle through a message. The vehicle controller compares the detected maximum insulation voltage value with the charging capability provided by the charging pile, and selects the larger value as the charging target voltage this time. The vehicle enters the charging start flow, and during this period, the boost converter needs to continuously detect the voltage at point A and report it to the vehicle controller. The vehicle controller enables the S1 and S2 relays in the boost converter. After confirming that the S1 and S2 relays are attracted, the boost electric drive is enabled to enter the boost pre-charging mode, and boost pre-charging is performed. The boost pre-charging target value is the charging target voltage this time. The vehicle controller detects that the boost converter A point voltage reaches the target value and is in a stable state, and determines that the boost pre-charging is completed. The boost electric drive is enabled to enter the boost charging mode, and when the charging pile and the boost converter are matched, the boost DC charging begins.

[0135] Figure 4 is a boost charging power-off timing diagram according to an embodiment of the application, as shown in Figure 4 When the boost DC charging is completed or the boost DC charging is abnormally disconnected, at this time, S1 and S2 are in the attracted state, and the boost capacitor voltage matches the charging pile voltage. When the pile end enters the disconnect relay flow, the vehicle end vehicle controller synchronously enables the S2 relay in the boost power distribution box to ensure that the charging port voltage quickly decreases to below 60V. After the S2 disconnect relay is enabled, the boost electric drive is enabled to enter the boost loop active discharge state, and the vehicle controller monitors the boost converter A point voltage to stop the boost electric drive active discharge command when the boost converter A point voltage decreases to 60V or below, and enables the S1 relay in the boost converter. If the boost capacitor voltage has not decreased to 60V after the boost electric drive enters the boost loop active discharge state for 2s, the vehicle controller directly controls the S1 relay to be disconnected, stops the active discharge, and enables the boost loop active discharge timeout fault code to be recorded at the same time. When the boost charging is performed, sudden disconnection of the charging gun, vehicle collision, and other unexpected working conditions occur, the vehicle controller identifies the unexpected working condition to enable the S2 relay to be disconnected, thereby ensuring that the charging port voltage is quickly cut off. At the same time, the electric drive is enabled to perform boost measurement active discharge for 2s, and the S1 relay is disconnected after 2s, thereby completing the boost loop power-off.

[0136] Optionally, when the boost DC charging heating ends, at this time the main circuit is powered on, S1 and S2 are in a closed state, the boost circuit is powered on, and the boost electric drive is in a boost charging heating mode (voltage mode). During the jump process, the BMS needs to continuously request the charging pile to output voltage, but does not output current, so as to maintain the boost capacitor voltage stable at the working voltage. The vehicle enables the boost electric drive to enter the boost charging mode (current mode), the vehicle controller detects that the boost converter A point voltage reaches the target value and is in a stable state, sends a boost charging permission, and performs boost charging.

[0137] Optionally, for the above three working conditions, the embodiment of the application proposes a vehicle strategy: by controlling the relays, the boost electric drive charges and discharges the boost capacitor, the charging compatibility problem of high-voltage vehicles is solved, and the user's electrical safety is improved.

[0138] In the embodiment of the application, when the DC charging pile is inserted and the battery has a charging request, the boost converter needs to close the voltage detection loop to continuously monitor the B point voltage. During the handshake process between the charging pile and the vehicle, the charging pile will perform insulation monitoring on the DC charging port. Generally, the insulation monitoring voltage is the maximum output voltage of the pile end. At this time, the vehicle needs to record the maximum value of the insulation voltage monitored this time. During the handshake process between the charging pile and the vehicle, the charging pile also sends the charging pile output voltage capability to the vehicle through a message. The vehicle controller compares and detects the maximum insulation voltage and the charging capability provided by the charging pile, and selects the larger value as the charging target voltage this time.

[0139] Boost capacitor voltage establishment: the vehicle enters the charging start flow, during which the boost converter needs to continuously detect the A point voltage and report it to the vehicle controller. The vehicle controller enables the S1 and S2 relays in the boost converter to be attracted. After confirming that the S1 and S2 relays are attracted, the boost electric drive is enabled to enter the boost pre-charging mode, pre-charged, and the boost pre-charging target value is the charging target voltage this time. The vehicle controller detects that the boost converter A point voltage reaches the target value and is in a stable state, and determines that the boost pre-charging is completed. The boost electric drive is enabled to enter the boost charging mode, and when the charging pile and the boost converter are matched, the boost DC charging is started.

[0140] Boost capacitor voltage bleeder: when the DC charging is finished, at this time S1, S2 are in the attraction state, the boost capacitor voltage matches the charging pile voltage. When the pile end enters the disconnection relay process, the vehicle end controller synchronously enables the disconnection of S2 relay in the boost power distribution box, ensuring that the charging port voltage quickly decreases to below 60V. After S2 relay is disconnected, the boost electric drive enters the boost loop active discharge state, and the vehicle controller monitors the boost converter A point voltage to decrease to 60V or below, and stops the boost electric drive active discharge command, and enables the disconnection of S1 relay in the boost converter. If the boost capacitor voltage has not decreased to 60V after the boost electric drive enters the boost loop active discharge state for 2s, the vehicle controller directly controls the disconnection of S1 relay, stops the active discharge, and enables the recording of the boost loop active discharge timeout fault code.

[0141] When the boost charging is performed, unexpected working conditions such as sudden disconnection of the charging gun, vehicle collision, etc. occur, the vehicle controller recognizes the unexpected working condition to enable the disconnection of S2 relay, ensuring that the charging port voltage is quickly cut off. At the same time, the electric drive is enabled to perform boost measurement active discharge for 2s, and S1 relay is disconnected after 2s, completing the boost loop power-down.

[0142] According to the embodiments of the present application, a control device for a boost circuit in a vehicle is also provided. It should be noted that the control device for the boost circuit in the vehicle can be used to execute the control method for the boost circuit in the vehicle in the above embodiments.

[0143] Figure 5 FIG. 1 is a schematic diagram of a control device for a boost circuit in a vehicle according to an embodiment of the present application, as shown in the figure, the control device 500 for the boost circuit in the vehicle can include: an acquisition unit 502, a first execution unit 504, a control unit 506 and a second execution unit 508. Figure 5

[0144] The acquisition unit 502 is configured to acquire a voltage signal of the power supply device in response to the connection between the vehicle and the power supply device being in a successful connection state.

[0145] The first execution unit 504 is configured to trigger a boost electric drive in the boost circuit of the vehicle to perform a pre-charging operation on a boost capacitor in the boost circuit based on the voltage signal.

[0146] The control unit 506 is configured to control the boost circuit to perform a charging operation on the energy storage device using electrical energy in response to completing the pre-charging operation on the boost capacitor.

[0147] The second execution unit 508 is configured to perform a bleeder operation on the boost capacitor using the boost electric drive in response to completing the charging operation on the energy storage device.

[0148] ​In the embodiment of the present application, the voltage signal of the power supply device is acquired by the acquisition unit 502 in response to the connection between the vehicle and the power supply device being in a successful connection state. The pre-charge operation on the boost capacitor in the boost circuit of the vehicle is performed by the first execution unit 504 based on the voltage signal. The control unit 506 controls the boost circuit to perform the charging operation on the energy storage device with the electrical energy in response to the completion of the pre-charge operation on the boost capacitor. The second execution unit 508 performs the discharge operation on the boost capacitor with the boost electric drive in response to the completion of the charging operation on the energy storage device, thereby solving the technical problem of low control accuracy of the boost circuit in the vehicle and achieving the technical effect of improving the control accuracy of the boost circuit in the vehicle.

[0149] According to the embodiment of the present application, a computer readable storage medium is also provided, which includes a stored program, wherein the program executes the above-mentioned method in the embodiment of the present application.

[0150] According to the embodiment of the present application, a processor is also provided, which is used to run a program, wherein the program runs to execute the above-mentioned method in the embodiment of the present application.

[0151] According to another aspect of the embodiment of the present application, an electronic device is also provided. The electronic device includes a memory and a processor, the memory stores a computer program, and the processor is configured to run the computer program to execute the above-mentioned method in the embodiment of the present application.

[0152] According to another aspect of the embodiment of the present application, a computer program product is also provided. The computer program product includes a computer program, which, when executed by a processor, implements the above-mentioned method in the embodiment of the present application.

[0153] According to another aspect of the embodiment of the present application, a vehicle is also provided. The vehicle includes a memory and a processor. The memory stores an executable program, and the processor is configured to run the program, which, when running, implements the above-mentioned method in the embodiment of the present application.

[0154] In the above-mentioned embodiments of the present application, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0155] In several embodiments provided in the present application, it should be understood that the disclosed technology can be implemented by other means. Among them, the above-mentioned device embodiments are only schematic, for example, the division of the units can be a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the displayed or discussed each other can be through some interface, indirect coupling or communication connection between units or modules, which can be electrical or other forms.

[0156] The units described as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, that is, they can be located in one place, or they can be distributed to multiple units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiment.

[0157] In addition, each functional unit in each embodiment of the present application can be integrated into a processing unit, or each unit can exist physically, or two or more units can be integrated into one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit.

[0158] The integrated unit, if realized in the form of a software functional unit and sold or used as an independent product, can be stored in a computer-readable storage medium. Based on this understanding, the technical solutions of the present application essentially or the part of the prior art that contributes to the technical solutions or all or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, including a plurality of instructions for causing a computer device (which can be a personal computer, a server or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: a U disk, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk or an optical disk, and various media that can store program codes.

[0159] The above is only the preferred embodiment of the present application. It should be noted that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should be considered as the protection scope of the present application.

Claims

1. A control method for a boost circuit in a vehicle, characterized in that, The vehicle includes an energy storage device, and the method includes: In response to a successful connection between the vehicle and the power supply equipment, the voltage signal of the power supply equipment is acquired, wherein the voltage signal is used to represent the voltage corresponding to the electrical energy output by the power supply equipment to the vehicle; Based on the voltage signal, the boost drive in the boost circuit of the vehicle is triggered to perform a pre-charge operation on the boost capacitor in the boost circuit, wherein the voltage of the pre-charged boost capacitor is matched with the power supply equipment; In response to the completion of the pre-charge operation on the boost capacitor, the boost circuit is controlled to perform a charging operation on the energy storage device using the electrical energy. In response to the completion of the charging operation on the energy storage device, the boost capacitor is discharged using the boost electric drive, wherein the voltage of the boost capacitor after discharge is not matched with that of the power supply device.

2. The method according to claim 1, characterized in that, The boost circuit includes a boost converter, the boost converter includes a first voltage detection point, and the boost converter includes a first relay and a second relay. In response to a successful connection between the vehicle and the power supply equipment, it acquires the voltage signal from the power supply equipment, including: In response to the successful connection between the vehicle and the power supply equipment, and the energy storage device triggering a charging request, a closing operation is performed on the first relay and the second relay. In response to the completion of the closing operation, the first relay and the second relay are in a closed state, and the voltage signal is acquired using the first voltage detection point.

3. The method according to claim 2, characterized in that, The boost circuit also includes a DC charging port. Based on the voltage signal, the boost drive in the boost circuit is triggered to perform a pre-charge operation on the boost capacitor in the boost circuit, including: Insulation testing is performed on the DC charging port to obtain the maximum insulation voltage of the DC charging port; The maximum value of the insulation voltage and the voltage signal is determined as the target charging voltage of the boost capacitor; In response to the first relay and the second relay being in the closed state, the boost electric drive is controlled to enter the boost pre-charge mode; In the boost pre-charge mode, the boost electric drive is controlled to perform the pre-charge operation on the boost capacitor; The method further includes: In response to the voltage of the boost capacitor after performing the pre-charge operation being the target charging voltage, it is determined that the voltage of the boost capacitor matches the power supply device.

4. The method according to claim 3, characterized in that, The boost converter includes a second voltage detection point, and the method further includes: In response to the voltage of the boost capacitor obtained at the second voltage detection point reaching the target charging voltage and the voltage of the boost capacitor being in a stable voltage state, it is determined that the pre-charging operation has been completed for the boost capacitor.

5. The method according to claim 1, characterized in that, The boost circuit includes a boost converter, which includes a first relay, a second relay, and a second voltage detection point. In response to performing the charging operation on the energy storage device, the boost electric drive performs a discharge operation on the boost capacitor, including: In response to the completion of the charging operation and the fact that the first relay and the second relay are in the closed state, the second relay is controlled to perform an opening operation; In response to the completion of the disconnection operation, the second relay is in the disconnected state, controlling the boost electric drive to enter the boost circuit active discharge state; In the active discharge state of the boost circuit, the discharge operation is performed on the voltage of the boost capacitor; The method further includes: obtaining the voltage of the boost capacitor during the discharge operation through the second voltage detection point; In response to the voltage of the boost capacitor after the discharge operation being performed being less than a target voltage threshold, it is determined that the voltage of the boost capacitor after the discharge operation is not matched with the power supply device.

6. The method according to claim 5, characterized in that, The method further includes: In response to the voltage of the boost capacitor being less than the target voltage threshold after the discharge operation is performed, a stop boost drive active discharge command is triggered, the boost drive is controlled to exit the active discharge state of the boost circuit, and the first relay is controlled to perform the disconnect operation; In response to the duration during which the boost electric drive enters the active discharge state of the boost circuit, reaching the target duration, and the voltage of the boost capacitor after the discharge operation being performed being greater than or equal to the target voltage threshold, the first relay is controlled to perform the disconnection operation.

7. The method according to any one of claims 1 to 6, characterized in that, The boost circuit includes a first relay and a second relay, and the method further includes: In response to an abnormality in the charging operation process, and with the first and second relays in a closed state, the second relay is controlled to perform a disconnection operation; In response to the completion of the disconnection operation, the second relay is in the disconnected state, controlling the boost electric drive to enter the boost circuit active discharge state; In response to the duration during which the boost electric drive enters the active discharge state of the boost circuit, and the target duration is reached, the first relay is controlled to perform the disconnection operation.

8. The method according to claim 1, characterized in that, The boost circuit includes a boost converter, the boost converter includes a second voltage detection point, and the method further includes: In response to the boost electric drive being in boost charging and heating mode, the voltage signal is acquired; In response to the voltage signal being in a stable state, and the voltage signal being the operating voltage of the power supply equipment, the boost electric drive is controlled to enter the boost charging mode; In the boost charging mode, the voltage of the boost capacitor is obtained through the second voltage detection point; In response to the voltage of the boost capacitor reaching the target charging voltage and the voltage of the boost capacitor being in a stable state, the energy storage device is boost-charged.

9. A control device for a boost circuit in a vehicle, characterized in that, The device includes: The acquisition unit is configured to acquire a voltage signal of the power supply device in response to a successful connection between the vehicle and the power supply device, wherein the voltage signal represents the voltage corresponding to the electrical energy output by the power supply device to the vehicle; The first execution unit is configured to trigger the boost electric drive in the boost circuit of the vehicle based on the voltage signal to perform a pre-charge operation on the boost capacitor in the boost circuit, wherein the voltage of the boost capacitor after pre-charging is matched with the power supply equipment. A control unit is configured to control the boost circuit to perform a charging operation on the energy storage device using the electrical energy in response to the completion of the pre-charging operation on the boost capacitor. The second execution unit is configured to perform the charging operation on the energy storage device by using the boost electric drive to perform a discharge operation on the boost capacitor, wherein the voltage of the boost capacitor after discharge is not matched with the power supply device.

10. A processor, characterized in that, The processor is used to run a program, wherein the program, when running, performs the method according to any one of claims 1 to 8.

11. An electronic device, characterized in that, The method includes a memory and a processor, wherein the memory stores a computer program and the processor is configured to run the computer program to perform the method according to any one of claims 1 to 8.

12. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored program, wherein, when the program is executed, it controls the device on which the computer-readable storage medium is located to perform the method according to any one of claims 1 to 8.

13. A computer program product, characterized in that, The computer program product includes a computer program that, when executed by a processor, implements the method described in any one of claims 1 to 8.

14. A vehicle, characterized in that, include: Memory, which stores executable programs; A processor for running the program, wherein the program, when running, performs the method according to any one of claims 1 to 8.

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