Low-voltage intelligent charging implementation method, system, medium and equipment

Abstract

The invention discloses a low-voltage intelligent charging implementation method and system, a medium and equipment. The method comprises the steps that whether a vehicle battery meets charging conditions or not is judged; if the vehicle battery meets the charging condition, sequentially controlling a battery management unit to perform closing control on a main negative contactor corresponding to the negative electrode of the battery, and controlling a hybrid power control unit to perform closing control on a main positive contactor corresponding to the positive electrode of the battery; and detecting the sequential closing state of the main negative contactor and the main positive contactor, and controlling a voltage converter and a target power supply to charge the vehicle battery according to the charge state value of the vehicle battery. Based on the data processing flow, the charging function can be started in real time according to the SOC of the battery, and the situation that the storage battery is lack of electricity due to long-time parking of the whole vehicle is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle power supply, in particular to a low-voltage intelligent power supply implementation method, system, medium and equipment. BACKGROUND

[0002] With the rapid development of new energy vehicles, especially the popularity of hybrid and electric vehicles, battery management and battery control units play an increasingly important role in ensuring vehicle performance and battery life. Battery management and battery control units are mainly responsible for monitoring and controlling the charging and discharging process of the battery to ensure the normal operation and safety of the battery. The existing battery control unit mainly relies on the traditional power supply method, which usually completes the battery charging task through one-time charging. However, with the continuous progress of battery technology, especially the continuous increase of battery capacity, the traditional power supply method cannot fully meet the charging needs of the vehicle during driving, especially under long-time and high-intensity use conditions, the battery power may not be replenished in time, thereby affecting the vehicle's endurance and overall performance.

[0003] The existing power supply method mostly adopts manual or automatic power supply control, but these methods have some problems, including the inability to accurately adjust according to the real-time state of the battery, inconsistent charging speed, etc. In hybrid and electric vehicles, the change of battery charge state and energy recovery mechanism makes the battery charging strategy need to be more intelligent to ensure the efficiency of the charging process and the extension of the battery life. At the same time, under the national double carbon slogan, the proportion of electric vehicles and extended-range electric vehicles is increasing, and currently the vehicle exists for a long time. The battery is depleted, the car cannot be started, which brings trouble to the user and the experience is also very poor. Therefore, how to quickly and accurately realize low-voltage intelligent power supply when the vehicle battery is insufficient, has become a technical problem to be solved. SUMMARY

[0004] The present application provides a low-voltage intelligent power supply implementation method, system, medium and equipment, which can start the power supply function in real time according to the battery SOC, avoiding the depletion of the storage battery caused by the long-time parking of the whole vehicle. In a first aspect, a low-voltage intelligent power supply implementation method is provided, applied to a battery control unit, comprising: determining whether the vehicle battery meets the power supply condition; If the vehicle battery meets the power supply condition, sequentially control the battery management unit to control the main negative contactor corresponding to the negative electrode of the battery to close, and control the hybrid power control unit to control the main positive contactor corresponding to the positive electrode of the battery to close; detecting the sequential closing state of the main negative contactor and the main positive contactor, and controlling the voltage converter and the target power supply to supply power to the vehicle battery according to the charge state value of the vehicle battery.

[0005] In some embodiments, the determining whether the vehicle battery satisfies the battery charging condition comprises: When it is detected that the vehicle is in the dormant state and the voltage of the vehicle battery is less than or equal to a preset voltage threshold, it is determined that the vehicle battery satisfies the battery charging condition.

[0006] In some embodiments, if the vehicle battery satisfies the battery charging condition, the battery management unit is sequentially controlled to close the main negative contactor corresponding to the negative electrode of the battery, and the hybrid power control unit is sequentially controlled to close the main positive contactor corresponding to the positive electrode of the battery, comprising: If the vehicle battery satisfies the battery charging condition, the battery management unit and the hybrid power control unit are sequentially awakened; sending a main negative contactor closing instruction to the battery management unit and controlling the battery management unit to close the main negative contactor according to the main negative contactor closing instruction; obtaining main negative contactor closing feedback information sent by the battery management unit, sending a main positive contactor closing instruction to the hybrid power control unit according to the main negative contactor closing feedback information, and controlling the hybrid power control unit to close the main positive contactor according to the main positive contactor closing instruction.

[0007] In some embodiments, the detecting the sequential closing state of the main negative contactor and the main positive contactor comprises: recording a main negative closing completion timestamp corresponding to the main negative contactor closing feedback information, a main positive closing instruction sending timestamp corresponding to the main positive contactor closing instruction, and a closing action start time of the main positive contactor; When it is detected that the main negative closing completion timestamp is earlier than the main positive closing instruction sending timestamp, and the main negative closing completion timestamp is earlier than the closing action start time, the voltage converter and the target power source are controlled to charge the vehicle battery according to the state of charge value of the vehicle battery; Otherwise, a main positive contactor opening instruction is sent to the hybrid power control unit, and / or a main negative contactor opening instruction is sent to the battery management unit.

[0008] In some embodiments, the controlling the voltage converter and the target power source to charge the vehicle battery according to the state of charge value of the vehicle battery comprises: When it is detected that the state of charge value of the vehicle battery is greater than or equal to a first preset charge value, a first target charging voltage of the vehicle battery is set, and the voltage converter and the target power source are controlled to charge the vehicle battery according to the first target charging voltage; When it is detected that the state of charge value of the vehicle battery is less than or equal to the second preset charge value, a second target charging voltage of the vehicle battery is set, and the voltage converter and the target power supply are controlled to charge the vehicle battery according to the second target charging voltage; When it is detected that the state of charge value of the vehicle battery is less than the first preset charge value and greater than the second preset charge value, a third target charging voltage of the vehicle battery is set, and the voltage converter and the target power supply are controlled to charge the vehicle battery according to the third target charging voltage.

[0009] In some embodiments, the control of the voltage converter and the target power supply to charge the vehicle battery comprises: The voltage converter converts the input voltage of the target power supply into a target voltage, which is the first target charging voltage, or the second target charging voltage, or the third target charging voltage; The vehicle battery is charged according to the target voltage.

[0010] In some embodiments, after the determination of whether the vehicle battery meets the charging condition, the method further comprises: If the vehicle battery does not meet the charging condition, a prompt instruction is sent to the vehicle central control unit, so that the vehicle central control unit controls the vehicle to issue a prompt alarm information; or, If the vehicle battery does not meet the charging condition, a prompt instruction is sent to the vehicle central control unit, so that the vehicle central control unit issues a prompt information to a user communication terminal or a vehicle terminal or a cloud.

[0011] In a second aspect, a low-voltage intelligent charging system is provided, comprising: A charging condition determination module is configured to determine whether the vehicle battery meets the charging condition; A closing control module is in communication connection with the charging condition determination module, and is configured to control the hybrid power control unit and the battery management unit to close the main positive contactor and the main negative contactor corresponding to the positive and negative electrodes of the battery, respectively, if the vehicle battery meets the charging condition; and, A battery charging module is in communication connection with the closing control module, and is configured to obtain the closing state of the main positive contactor and the main negative contactor, and control the voltage converter and the target power supply to charge the vehicle battery according to the state of charge value of the vehicle battery.

[0012] In a third aspect, a computer readable storage medium is provided, which stores a computer program, and the computer program is executed by a processor to implement the low-voltage intelligent charging method as described above.

[0013] Fourthly, embodiments of the present invention provide an electronic device, including a storage medium, a processor, and a computer program stored in the storage medium and executable on the processor, wherein the processor, when executing the computer program, implements the low-voltage intelligent power replenishment method as described above.

[0014] Compared with existing technologies, the advantages of this invention are as follows: it can quickly and effectively replenish battery power while ensuring battery safety. By determining whether the vehicle battery meets the charging conditions, the charging process can be initiated when the battery power is low, avoiding performance loss caused by over-discharge. When the battery meets the charging conditions, this invention can sequentially control the battery management unit to close the main negative contactor corresponding to the battery negative terminal, while simultaneously controlling the hybrid power control unit to close the main positive contactor corresponding to the battery positive terminal. This precise control sequence ensures the safety of the battery charging process.

[0015] Furthermore, this invention also features intelligent battery charging control. By real-time detection of the closing states of the main negative contactor and the main positive contactor, and by adjusting the charging strategy of the voltage converter and the target power source based on the vehicle battery's state of charge, precise control of the battery charging process is achieved. Therefore, this invention not only improves charging efficiency but also effectively extends battery life. Attached Figure Description

[0016] Figure 1 This is a schematic flowchart of an embodiment of a low-voltage intelligent power replenishment method according to the present invention; Figure 2 This is a schematic flowchart of another embodiment of the low-voltage intelligent power replenishment method of the present invention; Figure 3 This is a schematic flowchart of another embodiment of the low-voltage intelligent power replenishment method of the present invention; Figure 4 This is a schematic diagram of a low-voltage intelligent power replenishment system according to the present invention. Detailed Implementation

[0017] Referring now to specific embodiments of the invention, examples of which are illustrated in the accompanying drawings. Although the invention will be described in conjunction with specific embodiments, it will be understood that it is not intended to limit the invention to the described embodiments. Rather, it is intended to cover variations, modifications, and equivalents included within the spirit and scope of the invention as defined by the appended claims. It should be noted that the method steps described herein can be implemented by any functional block or functional arrangement, and any functional block or functional arrangement can be implemented as a physical entity or a logical entity, or a combination of both.

[0018] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] Note: The examples described below are merely specific examples and are not intended to limit the embodiments of the present invention to the specific steps, values, conditions, data, order, etc. Those skilled in the art can utilize the concept of the present invention to construct more embodiments not mentioned herein by reading this specification.

[0020] The following is an explanation of the vehicle-specific terms used in this invention: BCU: Body Control Unit, the central control unit, helps the various electronic systems of the vehicle work together and controls various functions of the vehicle body through sensors and actuators.

[0021] SOC: State of Charge, is the ratio between the current electrical energy stored in a battery and its maximum stored electrical energy, usually expressed as a percentage.

[0022] PCU: Power Control Unit, the battery control unit precisely controls the charging and discharging of the battery, monitors the battery status, and performs thermal management.

[0023] BMS: Battery Management System, which is responsible for managing and monitoring the performance of the battery pack.

[0024] HCM: Hybrid Control Module. The hybrid control module is typically found in hybrid electric vehicles and plug-in hybrid electric vehicles. It is responsible for controlling the coordination between the internal combustion engine and the electric motor.

[0025] DCDC: Direct Current to Direct Current. A converter is a type of power electronic device mainly used in systems such as electric vehicles and hybrid vehicles to convert the DC voltage of the battery into another DC voltage to meet the needs of different electrical systems.

[0026] Please see Figure 1 This invention provides a low-voltage intelligent power replenishment method, applied to a battery control unit. The method includes: Step S100, determine whether the vehicle battery meets the charging conditions, including: When the vehicle is detected to be in a dormant state and the vehicle battery voltage is less than or equal to a preset voltage threshold, it is determined that the vehicle battery meets the charging conditions.

[0027] Specifically, in this embodiment of the invention, when the vehicle is in sleep mode, the BCU (Body Central Control Unit) will periodically wake up to estimate the SOC (State of Charge) of the vehicle battery. When the battery SOC is too low, a low-voltage charging request needs to be initiated. At this time, the BCU network needs to wake up the PCU (Battery Control Unit). The PCU determines whether to activate the intelligent charging function based on the vehicle battery SOC, whether the vehicle is in sleep mode, whether there is a fault in the vehicle, and other factors.

[0028] If the activation conditions are not met, a fault reminder should be sent to the user (preferably an audible and visual alarm) to inform the user to apply high voltage to the vehicle to recharge the battery.

[0029] See also Figure 2 As shown, in step S200, if the vehicle battery meets the charging conditions, the battery management unit sequentially controls the closing control of the main negative contactor corresponding to the negative terminal of the battery, and controls the hybrid power control unit to close the closing control of the main positive contactor corresponding to the positive terminal of the battery, including: Step S210: If the vehicle battery meets the charging conditions, the battery management unit and the hybrid power control unit are woken up sequentially. Step S220: Send a main negative contactor closing command to the battery management unit, and control the battery management unit to close the main negative contactor according to the main negative contactor closing command; Step S230: Obtain the main negative contactor closure feedback information sent by the battery management unit, send the main positive contactor closure command to the hybrid power control unit according to the main negative contactor closure feedback information, and control the hybrid power control unit to close the main positive contactor according to the main positive contactor closure command.

[0030] Specifically, in this embodiment of the invention, if the vehicle battery meets the charging conditions, the PCU should perform a high-voltage operation. The PCU sequentially wakes up the high-voltage related devices such as the BMS battery management unit and the HCM hybrid power control unit. The PCU sends a main negative contactor closing command. After receiving the command, the BMS battery management unit executes the action of closing the main negative contactor and feeds back the closing feedback information of the main negative contactor to the PCU, i.e., closing success / closing failure / no action feedback information. If the main negative contactor fails to close successfully, including feedback of closing failure or no feedback after timeout, the PCU prohibits sending the main positive contactor closing command to the HCM and triggers a fault alarm. The PCU sends the main positive contactor closing command to the HCM according to the main negative contactor closing feedback information. Upon receiving the PCU's main positive closing command, the HCM executes the action of closing the main positive contactor and feeds back the actual status of the main positive contactor to the PCU. When the PCU receives that both the main positive and main negative contactors are in a closed state, the PCU enables the DC-DC voltage converter to charge the low-voltage battery through the target power high-voltage battery.

[0031] Step S300: Detect the sequential closing state of the main negative contactor and the main positive contactor, and control the voltage converter and the target power supply to replenish the vehicle battery according to the charge state value of the vehicle battery.

[0032] See also Figure 3 As shown, detecting the sequential closing state of the main negative contactor and the main positive contactor includes: Step S310: Record the main negative contactor closing completion timestamp corresponding to the main negative contactor closing feedback information, the main positive contactor closing instruction sending timestamp corresponding to the main positive contactor closing instruction, and the main positive contactor closing action start time; Step S320: When it is detected that the main negative closure completion timestamp is earlier than the main positive closure command sending timestamp, and the main negative closure completion timestamp is earlier than the closure action start time, the voltage converter and the target power supply are controlled to replenish the vehicle battery according to the charge state value of the vehicle battery. Step S330, otherwise, send a main positive contactor disconnect command to the hybrid power control unit, and / or send a main negative contactor disconnect command to the battery management unit.

[0033] Specifically, in this embodiment of the invention, during the process of the PCU battery control unit controlling the hybrid power control unit and the battery management unit to respectively control the closing of the main positive contactor and the main negative contactor corresponding to the positive and negative terminals of the battery, it is necessary to record the main negative contactor closing feedback information corresponding to the main negative contactor closing completion timestamp, the main positive contactor closing instruction sending timestamp corresponding to the main positive contactor closing instruction, the main positive contactor closing action start time, and perform sequence compliance verification. Verification Dimension 1: The closing completion time of the main negative contactor is earlier than the closing command sending time of the main positive contactor. That is, the closing completion timestamp of the main negative contactor is earlier than the closing command sending timestamp of the main positive contactor. Therefore, by comparing the timestamps, it is ensured that the main negative contactor has been stably closed before the main positive command is sent.

[0034] Verification Dimension 2: The closing action of the main positive contactor was not initiated before the closing of the main negative contactor was completed. That is, by comparing the start time of the main positive contactor action with the closing completion time of the main negative contactor through the feedback of HCM, the closing completion timestamp of the main negative contactor is earlier than the closing action start time of the main positive contactor.

[0035] If any verification dimension fails, the closing sequence is deemed to be in violation. The PCU immediately sends a main positive contactor disconnect command to the HCM hybrid power control unit and / or sends a main negative contactor disconnect command to the battery management unit (BMS), and simultaneously triggers a fault alarm message.

[0036] If the verification is successful, the entire vehicle is allowed to be powered on at high voltage.

[0037] The method of controlling the voltage converter and the target power source to replenish the vehicle battery based on the state of charge value of the vehicle battery includes: When the detected state of charge value of the vehicle battery is greater than or equal to the first preset charge value, the first target charging voltage of the vehicle battery is set, and the voltage converter and the target power supply are controlled to replenish the vehicle battery according to the first target charging voltage. When the detected state of charge value of the vehicle battery is less than or equal to the second preset charge value, the second target charging voltage of the vehicle battery is set, and the voltage converter and the target power supply are controlled to replenish the vehicle battery according to the second target charging voltage. When the detected state of charge value of the vehicle battery is less than the first preset charge value but greater than the second preset charge value, a third target charging voltage for the vehicle battery is set, and the voltage converter and the target power supply are controlled to replenish the vehicle battery according to the third target charging voltage.

[0038] Specifically, in this embodiment of the invention, SOC represents the ratio of the battery's current remaining capacity to its maximum capacity. Based on different SOC values, the PCU battery control unit adjusts the charging voltage to ensure efficient and safe battery charging.

[0039] When the state of charge (SOC) of a low-voltage battery is greater than or equal to a first preset charge value, the battery charging voltage will be set to a specific value – a first target charging voltage. For example, when the battery has a high charge level, the charging voltage may be lower to avoid overcharging.

[0040] When the SOC of the low-voltage battery is less than or equal to the second preset charge value, the charging voltage will be adjusted to another calibrated value - the second target charging voltage. This value is usually higher, with the aim of increasing the battery charge as quickly as possible and avoiding the battery charge being too low, which would affect the normal operation of the vehicle.

[0041] When the detected state of charge value of the vehicle battery is less than the first preset charge value but greater than the second preset charge value, the third target charging voltage of the vehicle battery is set. In other words, the charging voltage of the battery will not change within this range, thereby maintaining the stability of the charging process.

[0042] Therefore, by monitoring the SOC value of the low-voltage battery in real time, the charging voltage is intelligently adjusted. When the battery charge is high, the charging voltage is low; when the battery charge is low, the charging voltage is high; and when the battery charge is within a certain range, the charging voltage remains constant. This method effectively ensures battery charging efficiency, extends battery life, and adapts to different voltage systems, namely 12V and 24V.

[0043] Optionally, the control voltage converter and the target power source replenish the vehicle battery, including: The control voltage converter converts the input voltage of the target power supply into a target voltage, which is either the first target charging voltage, the second target charging voltage, or the third target charging voltage. The vehicle battery is recharged according to the target voltage.

[0044] Optionally, after determining whether the vehicle battery meets the charging conditions, the process includes: If the vehicle battery does not meet the charging requirements, a prompt command is sent to the vehicle's central control unit, which then controls the vehicle to issue a warning alarm; or, If the vehicle battery does not meet the charging requirements, a prompt command is sent to the vehicle central control unit, which then sends a prompt message to the user communication terminal, the vehicle terminal, or the cloud.

[0045] In summary, this invention provides a low-voltage intelligent charging method that can quickly and effectively replenish battery power while ensuring battery safety. By determining whether the vehicle battery meets the charging conditions, the charging process can be initiated when the battery power is low, avoiding performance loss caused by over-discharge. When the battery meets the charging conditions, this invention can sequentially control the battery management unit to close the main negative contactor corresponding to the battery's negative terminal, while simultaneously controlling the hybrid power control unit to close the main positive contactor corresponding to the battery's positive terminal. This precise control sequence ensures the safety of the battery charging process.

[0046] Furthermore, this invention features intelligent battery charging control. By real-time detection of the closing states of the main negative and main positive contactors and adjusting the charging strategy between the voltage converter and the target power source based on the vehicle battery's state of charge, precise control of the battery charging process is achieved. Therefore, this invention not only improves charging efficiency but also effectively extends battery life. This method provides vehicles with a more intelligent, efficient, and reliable charging solution, enhancing the driving experience and the level of intelligent battery management.

[0047] See also Figure 4 As shown, this embodiment of the invention also provides a low-voltage intelligent power replenishment system, including: The charging condition judgment module is used to determine whether the vehicle battery meets the charging conditions; A closing control module, communicatively connected to the charging condition judgment module, is used to control the hybrid power control unit and the battery management unit to respectively close the main positive contactor and the main negative contactor corresponding to the positive and negative terminals of the battery if the vehicle battery meets the charging conditions; and, The battery charging module is communicatively connected to the closing control module. It is used to obtain the closing status of the main positive contactor and the main negative contactor, and control the voltage converter and the target power supply to charge the vehicle battery according to the charge state value of the vehicle battery.

[0048] In summary, the main advantages of this invention are as follows: 1. Prevent the battery from draining and failing to start the vehicle if the vehicle is left unattended for an extended period.

[0049] 2. Intelligent control of charging voltage extends battery life.

[0050] 3. Even if the low-voltage intelligent charging cannot be activated, the user will be reminded that the battery power is low and to power on the battery immediately to charge it.

[0051] Specifically, this embodiment corresponds one-to-one with the above method embodiments. The functions of each module have been described in detail in the corresponding method embodiments, so they will not be repeated here.

[0052] Based on the same inventive concept, embodiments of this application also provide a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements all or part of the method steps of the above method.

[0053] The present invention can implement all or part of the processes in the above methods, or it can be accomplished by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when the computer program is executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable medium can include: any entity or device capable of carrying computer program code, recording media, USB flash drives, portable hard drives, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media, etc. It should be noted that the content contained in the computer-readable medium can be appropriately added or removed according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, the computer-readable medium does not include electrical carrier signals and telecommunication signals.

[0054] Based on the same inventive concept, embodiments of this application also provide an electronic device, including a memory and a processor. The memory stores a computer program that runs on the processor. When the processor executes the computer program, it implements all or part of the method steps described above.

[0055] The processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor can be a microprocessor or any conventional processor. The processor is the control center of the computer device, connecting all parts of the computer device through various interfaces and lines.

[0056] Memory can be used to store computer programs and / or modules. The processor performs various functions of the computer device by running or executing the computer programs and / or modules stored in the memory, and by accessing data stored in the memory. Memory can primarily include a program storage area and a data storage area. The program storage area can store the operating system and at least one application program required for a function (e.g., sound playback, image playback, etc.); the data storage area can store data created based on the use of the mobile phone (e.g., audio data, video data, etc.). Furthermore, memory can include high-speed random access memory, and can also include non-volatile memory, such as hard disks, RAM, plug-in hard disks, SmartMedia Cards (SMC), Secure Digital (SD) cards, Flash Cards, at least one disk storage device, flash memory device, or other volatile solid-state storage devices.

[0057] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, servers, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage and optical storage) containing computer-usable program code.

[0058] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), servers, and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0059] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0060] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0061] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A low-voltage intelligent power replenishment method, applied to a battery control unit, characterized in that, include: Determine if the vehicle battery meets the conditions for charging. If the vehicle battery meets the charging conditions, the sequential control battery management unit will close the main negative contactor corresponding to the negative terminal of the battery, and control the hybrid power control unit to close the main positive contactor corresponding to the positive terminal of the battery. The sequential closing status of the main negative contactor and the main positive contactor is detected, and the voltage converter and the target power supply are controlled to replenish the vehicle battery according to the charge state value of the vehicle battery.

2. The low-voltage intelligent power replenishment method as described in claim 1, characterized in that, The determination of whether the vehicle battery meets the charging conditions includes: When the vehicle is detected to be in a dormant state and the vehicle battery voltage is less than or equal to a preset voltage threshold, it is determined that the vehicle battery meets the charging conditions.

3. The low-voltage intelligent power replenishment method as described in claim 1, characterized in that, If the vehicle battery meets the charging conditions, the sequential control battery management unit closes the main negative contactor corresponding to the battery negative terminal, and controls the hybrid power control unit to close the main positive contactor corresponding to the battery positive terminal, including: If the vehicle battery meets the charging requirements, the battery management unit and the hybrid power control unit will be woken up sequentially. Send a main negative contactor closing command to the battery management unit, and control the battery management unit to close the main negative contactor according to the main negative contactor closing command; The system obtains the main negative contactor closure feedback information sent by the battery management unit, sends the main positive contactor closure command to the hybrid power control unit according to the main negative contactor closure feedback information, and controls the hybrid power control unit to close the main positive contactor according to the main positive contactor closure command.

4. The low-voltage intelligent power replenishment method as described in claim 3, characterized in that, The detection of the sequential closing status of the main negative contactor and the main positive contactor includes: Record the main negative contactor closing feedback information corresponding to the main negative closing completion timestamp, the main positive contactor closing instruction sending timestamp corresponding to the main positive contactor closing instruction, and the main positive contactor closing action start time; When it is detected that the main negative closure completion timestamp is earlier than the main positive closure command sending timestamp, and the main negative closure completion timestamp is earlier than the closure action start time, the voltage converter and the target power supply are controlled to replenish the vehicle battery according to the vehicle battery's state of charge value; Otherwise, a main positive contactor disconnect command is sent to the hybrid power control unit, and / or a main negative contactor disconnect command is sent to the battery management unit.

5. The low-voltage intelligent power replenishment method as described in claim 1, characterized in that, The method of controlling the voltage converter and the target power source to replenish the vehicle battery based on the state of charge value of the vehicle battery includes: When the detected state of charge value of the vehicle battery is greater than or equal to the first preset charge value, the first target charging voltage of the vehicle battery is set, and the voltage converter and the target power supply are controlled to replenish the vehicle battery according to the first target charging voltage. When the detected state of charge value of the vehicle battery is less than or equal to the second preset charge value, the second target charging voltage of the vehicle battery is set, and the voltage converter and the target power supply are controlled to replenish the vehicle battery according to the second target charging voltage. When the detected state of charge value of the vehicle battery is less than the first preset charge value but greater than the second preset charge value, a third target charging voltage for the vehicle battery is set, and the voltage converter and the target power supply are controlled to replenish the vehicle battery according to the third target charging voltage.

6. The low-voltage intelligent power replenishment method as described in claim 5, characterized in that, The control voltage converter and the target power source replenish the vehicle battery, including: The control voltage converter converts the input voltage of the target power supply into a target voltage, which is either the first target charging voltage, the second target charging voltage, or the third target charging voltage. The vehicle battery is recharged according to the target voltage.

7. The low-voltage intelligent power replenishment method as described in claim 1, characterized in that, After determining whether the vehicle battery meets the conditions for charging, the following steps are included: If the vehicle battery does not meet the charging requirements, a prompt command is sent to the vehicle's central control unit, which then controls the vehicle to issue a warning alarm; or, If the vehicle battery does not meet the charging requirements, a prompt command is sent to the vehicle central control unit, which then sends a prompt message to the user communication terminal, the vehicle terminal, or the cloud.

8. A low-voltage intelligent power replenishment system, characterized in that, include: The charging condition judgment module is used to determine whether the vehicle battery meets the charging conditions; The closing control module is communicatively connected to the charging condition judgment module. If the vehicle battery meets the charging conditions, it controls the hybrid power control unit and the battery management unit to close the main positive contactor and the main negative contactor corresponding to the positive and negative terminals of the battery, respectively. as well as, The battery charging module is communicatively connected to the closing control module. It is used to obtain the closing status of the main positive contactor and the main negative contactor, and control the voltage converter and the target power supply to charge the vehicle battery according to the charge state value of the vehicle battery.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the low-voltage intelligent power replenishment method as described in any one of claims 1 to 7.

10. An electronic device comprising a storage medium, a processor, and a computer program stored in the storage medium and executable on the processor, characterized in that, When the processor runs the computer program, it implements the low-voltage intelligent power replenishment method as described in any one of claims 1 to 7.

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