Charging control method and device for automobile low-voltage storage battery, vehicle and storage medium

Abstract

The invention relates to a charging control method and device for an automobile low-voltage storage battery, a vehicle and a storage medium, and the method comprises the steps: detecting the charge state of the automobile low-voltage storage battery under the condition that an automobile key power supply is in an off gear; judging whether the low-voltage storage battery of the automobile meets a preset charging condition or not according to the charge state; when the state of charge is lower than a first preset threshold value, a first-stage electricity supplementing signal is triggered to supplement electricity for the low-voltage storage battery of the automobile, when the state of charge is lower than a second preset threshold value, a second-stage electricity supplementing signal is triggered to link the high-voltage battery to supplement electricity for the low-voltage storage battery of the automobile, and when the state of charge is lower than a third preset threshold value, a third-stage electricity supplementing signal is triggered to link the high-voltage battery to supplement electricity for the low-voltage storage battery of the automobile; therefore, the electric load of the automobile is controlled, and the low-voltage storage battery of the automobile is charged emergently. Therefore, the problems that a grading response mechanism is lacked in the related technology, the power supplementing strategy and the power utilization load management cannot be dynamically adjusted according to the power shortage degree of the battery, and early warning cannot be timely sent to a user through a remote terminal are solved.

Description

Technical Field

[0001] This application relates to the technical field of low-voltage battery management systems for new energy vehicles, and in particular to a method, device, vehicle, and storage medium for charging control of low-voltage batteries in automobiles. Background Technology

[0002] Currently, with the continuous growth of the new energy vehicle market, low-voltage batteries frequently experience power depletion issues when vehicles are parked for extended periods or used improperly. This leads to serious functional problems such as the vehicle being unable to start normally, doors being unable to unlock, and anti-theft systems failing, causing strong complaints from users and becoming a key pain point affecting the user experience and brand reputation of new energy vehicles.

[0003] In related technologies, it is possible to monitor the low-voltage battery power in real time and realize intelligent charging closed-loop control through VCU (Vehicle Control Unit). Typically, the vehicle controller monitors the low-voltage battery based on its voltage or state of charge, and triggers charging logic when insufficient power is detected, converting the high-voltage power battery energy into low-voltage power to charge the small battery.

[0004] However, the relevant technologies lack a graded response mechanism, making it impossible to dynamically adjust the power replenishment strategy and power load management according to the degree of battery depletion. When power replenishment fails or the battery is severely depleted, it cannot issue timely warnings to users through remote terminals, which urgently needs to be improved. Summary of the Invention

[0005] This application provides a method, device, vehicle, and storage medium for controlling the charging of low-voltage automotive batteries, in order to solve the problems that frequently occur in related technologies, such as the problem of small battery depletion, which leads to the vehicle's inability to function properly and strong user complaints.

[0006] The first aspect of this application provides a method for controlling the charging of a low-voltage automotive battery, comprising the following steps: when the car key power is off, detecting the state of charge (SOC) of the low-voltage automotive battery; determining whether the low-voltage automotive battery meets preset charging conditions based on the SOC; if the low-voltage automotive battery meets the preset charging conditions, triggering a first-level charging signal when the SOC is below a first preset threshold to charge the low-voltage automotive battery, triggering a second-level charging signal when the SOC is below a second preset threshold to link the high-voltage battery to charge the low-voltage automotive battery, and triggering a third-level charging signal when the SOC is below a third preset threshold to control the vehicle's electrical load and provide emergency charging for the low-voltage automotive battery.

[0007] Optionally, in one embodiment of this application, after emergency charging of the vehicle's low-voltage battery, the method further includes: recording the number of charging failures when the vehicle's low-voltage battery meets preset charging failure conditions; and pushing a prompt message using a preset terminal when the number of charging failures reaches a preset number to alert the user to the abnormal state of the vehicle.

[0008] Optionally, in one embodiment of this application, after determining whether the low-voltage battery of the vehicle meets the preset charging conditions based on the state of charge, the method further includes: if the low-voltage battery of the vehicle does not meet the preset charging conditions, controlling the low-voltage battery of the vehicle to enter a dormant state and resetting the timer until the preset detection time is reached, and then re-detecting the state of charge of the low-voltage battery of the vehicle.

[0009] Optionally, in one embodiment of this application, triggering a first-level charging signal to charge the vehicle's low-voltage battery when the state of charge is lower than a first preset threshold includes: triggering the first-level charging signal when the state of charge of the vehicle's low-voltage battery is lower than the first preset threshold; and, in response to the first-level charging signal, charging the vehicle's low-voltage battery according to its current voltage state.

[0010] Optionally, in one embodiment of this application, triggering a secondary charging signal when the state of charge is lower than a second preset threshold, so as to link the high-voltage battery to charge the low-voltage battery of the vehicle, includes: when the state of charge of the low-voltage battery of the vehicle is lower than the second preset threshold, sending a high-voltage power-on request to the battery management system using the vehicle controller; and after receiving the high-voltage power-on request, starting the DC-DC converter to convert the electrical energy of the high-voltage battery into DC power that meets preset conditions, so as to charge the low-voltage battery of the vehicle.

[0011] Optionally, in one embodiment of this application, the step of triggering a three-level charging signal when the state of charge is lower than a third preset threshold to control the vehicle's electrical load and provide emergency charging for the vehicle's low-voltage battery includes: triggering the three-level charging signal when the state of charge of the low-voltage battery is lower than the third preset threshold to activate a three-level emergency charging mode; and based on the three-level emergency charging mode, restricting the vehicle from activating electrical loads that meet preset non-essential conditions to provide emergency charging for the vehicle's low-voltage battery, wherein the electrical loads that meet the preset non-essential conditions include at least one of ambient lighting, an electric tailgate, and a vehicle refrigerator.

[0012] Optionally, in one embodiment of this application, the method further includes: acquiring the charging start signal, the end control signal, the battery voltage status signal, the actual connection status of the relays, the operating status of the DC-DC converter, and the actual connection status of the main positive and main negative relays of the vehicle's low-voltage battery; and uploading the charging start signal, the end control signal, the battery voltage status signal, the actual connection status of the relays, the operating status of the DC-DC converter, and the actual connection status of the main positive and main negative relays to a remote platform to monitor the execution status of the vehicle's low-voltage battery during the charging process.

[0013] A second aspect of this application provides a charging control device for a low-voltage automotive battery, comprising: a detection module for detecting the state of charge (SOC) of the low-voltage automotive battery when the car key power is off; a judgment module for judging whether the low-voltage automotive battery meets preset charging conditions based on the SOC; and a charging control module for triggering a first-level charging signal to charge the low-voltage automotive battery when the SOC is below a first preset threshold, and triggering a second-level charging signal to charge the low-voltage automotive battery when the SOC is below a second preset threshold, thereby linking a high-voltage battery to charge the low-voltage automotive battery, and triggering a third-level charging signal to control the vehicle's electrical load and provide emergency charging for the low-voltage automotive battery when the SOC is below a third preset threshold.

[0014] Optionally, in one embodiment of this application, it further includes: a recording module, used to record the number of charging failures when the low-voltage battery of the vehicle meets the preset charging failure conditions after emergency charging is performed; and a prompting module, used to push prompting information to the user using a preset terminal when the number of charging failures reaches a preset number, so as to prompt the user of the abnormal status of the vehicle.

[0015] Optionally, in one embodiment of this application, it further includes: a re-detection module, used to control the low-voltage battery of the vehicle to enter a dormant state and restart the timing when the low-voltage battery of the vehicle does not meet the preset charging conditions after determining whether the low-voltage battery of the vehicle meets the preset charging conditions based on the state of charge, until the preset detection time is reached, and then re-detect the state of charge of the low-voltage battery of the vehicle.

[0016] Optionally, in one embodiment of this application, the power replenishment control module includes: a triggering unit, configured to trigger the first-level power replenishment signal when the state of charge of the vehicle's low-voltage battery is lower than the first preset threshold; and a first-level power replenishment unit, configured to replenish the vehicle's low-voltage battery according to the current voltage state of the vehicle's low-voltage battery in response to the first-level power replenishment signal.

[0017] Optionally, in one embodiment of this application, the power replenishment control module includes: a sending unit, configured to send a high-voltage power-on request to the battery management system via the vehicle controller when the state of charge of the vehicle's low-voltage battery is lower than the second preset threshold; and a secondary power replenishment unit, configured to, upon receiving the high-voltage power-on request, activate a DC-DC converter to convert the electrical energy of the high-voltage battery into DC power that meets preset conditions, so as to replenish the vehicle's low-voltage battery.

[0018] Optionally, in one embodiment of this application, the power replenishment control module includes: a starting unit, configured to trigger the trigger three-level power replenishment signal to activate a three-level emergency power replenishment mode when the state of charge of the low-voltage battery is lower than the third preset threshold; and a three-level power replenishment unit, configured to restrict the vehicle from starting electrical loads that meet preset non-essential conditions based on the three-level emergency power replenishment mode, so as to provide emergency power replenishment to the vehicle's low-voltage battery, wherein the electrical loads that meet the preset non-essential conditions include at least one of ambient lighting, electric tailgate, and vehicle refrigerator.

[0019] Optionally, in one embodiment of this application, it further includes: an acquisition module, used to acquire the charging start signal, the end control signal, the battery voltage status signal, the actual connection status of the relays, the operating status of the DC-DC converter, and the actual connection status of the main positive and main negative relays of the vehicle low-voltage battery; and a monitoring module, used to upload the charging start signal, the end control signal, the battery voltage status signal, the actual connection status of the relays, the operating status of the DC-DC converter, and the actual connection status of the main positive and main negative relays to a remote platform to monitor the execution status of the vehicle low-voltage battery during the charging process.

[0020] A third aspect of this application provides a vehicle, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the charging control method for a low-voltage automotive battery as described in the above embodiments.

[0021] A fourth aspect of this application provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described method for charging a low-voltage automotive battery.

[0022] This embodiment of the application can periodically wake up the vehicle domain controller when the vehicle key is in the OFF position to detect the state of charge or voltage of the low-voltage battery. Based on a preset three-level threshold, it dynamically triggers different levels of charging strategies to specifically charge the vehicle's low-voltage battery. If charging fails, it prompts the user to go to a repair shop as soon as possible, ensuring vehicle safety. This highly intelligent system extends the lifespan of the low-voltage battery. Simultaneously, the system monitors the status and counts failures for each charging process. If three consecutive charging failures occur or the battery voltage is detected to be below a safety threshold (e.g., 11.5V), a warning message is pushed to the user's mobile app via the TBOX module, prompting the user to go to a repair shop for inspection. This solves the problems of related technologies lacking a graded response mechanism, being unable to dynamically adjust charging strategies and power load management according to the degree of battery depletion, and failing to promptly issue warnings to the user via a remote terminal when charging fails or the battery is severely depleted.

[0023] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0024] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein: Figure 1 This is a flowchart of a charging control method for a low-voltage automotive battery according to an embodiment of this application; Figure 2 This is a schematic diagram illustrating the principle of a charging control method for a low-voltage automotive battery according to an embodiment of this application. Figure 3 This is a schematic diagram of a charging control device for a low-voltage automotive battery according to an embodiment of this application; Figure 4 This is a structural schematic diagram of a vehicle provided according to an embodiment of this application. Detailed Implementation

[0025] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0026] The following description, with reference to the accompanying drawings, outlines a method, apparatus, vehicle, and storage medium for controlling the charging of a low-voltage automotive battery according to embodiments of this application. Addressing the issues mentioned in the background art, such as the lack of a tiered response mechanism, the inability to dynamically adjust charging strategies and power load management based on battery depletion levels, and the failure to promptly issue warnings to users via remote terminals in cases of charging failure or severe battery depletion, this application provides a method for controlling the charging of a low-voltage automotive battery. In this method, with the vehicle key in the OFF position, the vehicle domain controller is periodically activated to detect the state of charge or voltage of the low-voltage battery. Based on preset three-level thresholds, different levels of charging strategies are dynamically triggered to specifically charge the low-voltage battery. In cases of charging failure, a prompt is provided to visit a repair shop as soon as possible, ensuring vehicle safety. This method is highly intelligent and extends the lifespan of the low-voltage battery. Therefore, it solves the problems of related technologies, such as the lack of a tiered response mechanism, the inability to dynamically adjust charging strategies and power load management based on battery depletion levels, and the failure to promptly issue warnings to users via remote terminals in cases of charging failure or severe battery depletion.

[0027] Specifically, Figure 1 This is a schematic flowchart illustrating a method for controlling the charging of a low-voltage automotive battery, as provided in an embodiment of this application.

[0028] like Figure 1 As shown, the charging control method for the low-voltage battery of this vehicle includes the following steps: In step S101, with the car key power in the off position, the state of charge of the car's low-voltage battery is detected.

[0029] It is understood that the closed position in this application embodiment is the OFF position.

[0030] In actual implementation, this embodiment of the application can automatically detect the state of charge of the vehicle's low-voltage battery at regular intervals when the car key power is in the OFF position, thereby understanding the battery health status in real time.

[0031] In step S102, it is determined whether the vehicle's low-voltage battery meets the preset charging conditions based on its state of charge.

[0032] It is understood that the preset charging conditions in the embodiments of this application can be the conditions for whether or not to start charging control of the low-voltage battery of the vehicle.

[0033] In actual implementation, the embodiments of this application can determine whether the low-voltage battery of the vehicle meets the preset charging conditions based on the state of charge of the low-voltage battery. For example, when the vehicle is in the key-off position and the system is periodically woken up, the current state of charge or voltage value of the low-voltage battery is obtained, and a comprehensive judgment is made in combination with factors such as the charging function enable status, the availability of the high-voltage system and the time interval.

[0034] The embodiments of this application improve the targeting and effectiveness of power replenishment through the judgment method, avoid unnecessary energy consumption and system wake-up, thereby improving the user experience.

[0035] It should be noted that the preset power replenishment conditions can be set by those skilled in the art according to the actual situation, and no specific restrictions are imposed here.

[0036] Optionally, in one embodiment of this application, after determining whether the vehicle's low-voltage battery meets the preset charging conditions based on the state of charge, the method further includes: if the vehicle's low-voltage battery does not meet the preset charging conditions, controlling the vehicle's low-voltage battery to enter a dormant state and resetting the timer until the preset detection time is reached, and then re-detecting the state of charge of the vehicle's low-voltage battery.

[0037] It is understood that the preset detection time in the embodiments of this application can be 10 seconds.

[0038] In actual implementation, if the vehicle detects that the battery status does not meet the preset charging conditions when the key power is OFF, it can go into sleep mode and restart the timer until the next detection time is met, and then re-detect the state of charge of the vehicle's low-voltage battery. For example, if the vehicle detects that the battery is not fully charged, it can re-detect the state of charge of the vehicle's low-voltage battery after the detection time reaches 10 seconds.

[0039] The embodiments of this application can control the low-voltage battery of the vehicle to enter sleep mode and reset the timing, so as to ensure that the status of the low-voltage battery is periodically detected and necessary recharged without affecting the power consumption of the vehicle during sleep mode, thereby avoiding the problem of power failure caused by long-term parking.

[0040] In step S103, if the vehicle's low-voltage battery meets the preset charging conditions, a first-level charging signal is triggered when the state of charge is lower than the first preset threshold to charge the vehicle's low-voltage battery. When the state of charge is lower than the second preset threshold, a second-level charging signal is triggered to link the high-voltage battery to charge the vehicle's low-voltage battery. When the state of charge is lower than the third preset threshold, a third-level charging signal is triggered to control the vehicle's electrical load and provide emergency charging for the vehicle's low-voltage battery.

[0041] It is understood that the first preset threshold in the embodiments of this application can be 20%, the second preset threshold can be 15%, and the third preset threshold can be 10%.

[0042] In this embodiment, when the vehicle's low-voltage battery meets the preset charging conditions, a three-level protection mechanism can be activated. When the state of charge is less than 20%, a first-level charging signal is triggered to charge the vehicle's low-voltage battery. When the state of charge is less than 15%, a second-level charging signal is triggered to link the high-voltage battery and, with the permission of the BMS (Battery Management System), charge the vehicle's low-voltage battery. When the state of charge is less than 10%, an emergency mode is activated, triggering a third-level charging signal to control the vehicle's electrical load and provide emergency charging for the vehicle's low-voltage battery.

[0043] The embodiments of this application can dynamically trigger different levels of power replenishment strategies based on preset three-level thresholds, and specifically replenish the low-voltage battery of the car, thereby improving the intelligence of the car and enhancing the user experience.

[0044] Optionally, in one embodiment of this application, when the state of charge of the vehicle is lower than a first preset threshold, a first-level charging signal is triggered to charge the vehicle's low-voltage battery, including: triggering a first-level charging signal when the state of charge of the vehicle's low-voltage battery is lower than the first preset threshold; and in response to the first-level charging signal, charging the vehicle's low-voltage battery according to the current voltage state of the vehicle's low-voltage battery.

[0045] In this embodiment, when the state of charge of the vehicle's low-voltage battery is lower than a first preset threshold, a first-level charging signal is triggered. In response to the first-level charging signal, the system does not immediately activate the high-voltage battery. Instead, based on the current voltage state of the low-voltage battery, it performs trickle charging with a small current through the standby power supply path of the vehicle converter or the residual energy management circuit. Alternatively, when conditions are met, it briefly wakes up part of the low-voltage power network to perform charging, thereby charging the vehicle's low-voltage battery according to its current voltage state.

[0046] The embodiments of this application can avoid unnecessary activation of high-voltage systems, reduce static power consumption, and improve system reliability by intelligent hierarchical power replenishment and dynamic selection of power replenishment strategies.

[0047] Optionally, in one embodiment of this application, when the state of charge is lower than a second preset threshold, a secondary power replenishment signal is triggered to link the high-voltage battery to replenish the vehicle's low-voltage battery. This includes: when the state of charge of the vehicle's low-voltage battery is lower than the second preset threshold, sending a high-voltage power-on request to the battery management system using the vehicle controller; and upon receiving the high-voltage power-on request, starting the DC-DC converter to convert the electrical energy of the high-voltage battery into DC power that meets preset conditions to replenish the vehicle's low-voltage battery.

[0048] It is understood that the DC-DC converter in the embodiments of this application is a DC-DC converter.

[0049] In actual implementation, when the state of charge of the low-voltage battery of the vehicle is lower than the second preset threshold, the vehicle controller sends a high-voltage power-on request to the battery management system. After receiving the high-voltage power-on request, the high-voltage connection is controlled, the DC-DC converter works, and the battery is recharged for a period of time. That is, the DC-DC converter is started to convert the electrical energy of the high-voltage battery into DC power that meets the preset conditions to recharge the low-voltage battery of the vehicle.

[0050] The embodiments of this application can activate the high-voltage system to actively replenish power when the low-voltage battery is severely depleted, further improving the user experience and ensuring high system safety.

[0051] Optionally, in one embodiment of this application, when the state of charge is lower than a third preset threshold, a three-level charging signal is triggered to control the vehicle's electrical load and provide emergency charging for the vehicle's low-voltage battery. This includes: triggering a three-level charging signal when the state of charge of the low-voltage battery is lower than the third preset threshold to activate a three-level emergency charging mode; and, based on the three-level emergency charging mode, restricting the vehicle from starting electrical loads that meet preset non-essential conditions to provide emergency charging for the vehicle's low-voltage battery. The electrical loads that meet the preset non-essential conditions include at least one of ambient lighting, an electric tailgate, and a vehicle refrigerator.

[0052] In this embodiment, when the state of charge of the low-voltage battery is lower than a third preset threshold, a three-level replenishment signal is triggered to activate a three-level emergency replenishment mode. This mode restricts the starting of electrical loads such as ambient lights, electric tailgate, and car refrigerator, thereby providing emergency replenishment to the low-voltage battery. In extreme low-voltage conditions, this prioritizes the power supply to critical vehicle functions such as remote unlocking, anti-theft system, and low-voltage control system, preventing the low-voltage battery voltage from failing to wake up the vehicle system and providing time and energy reserves for subsequent user intervention or automatic replenishment.

[0053] Optionally, in one embodiment of this application, after emergency charging of the vehicle's low-voltage battery, the method further includes: recording the number of charging failures when the vehicle's low-voltage battery meets preset charging failure conditions; and pushing a prompt message using a preset terminal when the number of charging failures reaches a preset number to alert the user to the abnormal state of the vehicle.

[0054] It is understood that the preset charging failure condition in the embodiments of this application can be the condition for the vehicle charging failure; the number of charging failures can be, but is not limited to, 3 times.

[0055] In actual implementation, this application embodiment can, when the ignition key is in the OFF position, if the vehicle fails to charge or completes a normal charge, and there are no other functions requiring high-voltage connection, the vehicle will enter sleep mode. During the continuous OFF state, if a charge fails, a count is entered; the count is reset when the vehicle is powered on and off. If a vehicle fails to charge three times consecutively during the continuous OFF state, the function is suppressed until the vehicle is powered on and off again. During the charge process, if other functions requiring high-voltage connection occur, the current charge function ends until the charge conditions are met again, exceeding a certain value, at which point charge can be charged again. During the continuous OFF state, if a vehicle fails to charge three times consecutively, the app will notify the owner to go to a repair shop for inspection as soon as possible.

[0056] This application embodiment can prompt the user to go to a repair shop as soon as possible after a charging failure, ensuring vehicle safety, demonstrating high intelligence, and extending the service life of the low-voltage battery.

[0057] Optionally, in one embodiment of this application, the method further includes: acquiring the charging start signal, the end control signal, the battery voltage status signal, the actual connection status of the relays, the operating status of the DC-DC converter, and the actual connection status of the main positive and main negative relays of the vehicle's low-voltage battery; and uploading the charging start signal, the end control signal, the battery voltage status signal, the actual connection status of the relays, the operating status of the DC-DC converter, and the actual connection status of the main positive and main negative relays to a remote platform to monitor the execution status of the vehicle's low-voltage battery during the charging process.

[0058] It is understandable that, such as Figure 2 As shown, the embodiments of this application include CEM: Body Domain Controller, VCU: Vehicle Controller, BMS: Battery Management Controller, CMDC: On-board Charger DC-DC Converter Assembly, TBOX: Wireless Communication Module, and MCU: Electric Drive Controller.

[0059] In actual implementation, this application embodiment can report status and provide APP reminders. After the function is enabled, during the charging function activation period, the control signals for the start and end of intelligent charging, the battery voltage status signal, the actual connection status of the relay, the working status of the DC-DC converter, and the actual connection status of the main positive and main negative relays are uploaded in real time to monitor the execution status of the vehicle's low-voltage battery during the charging process and trigger user warnings in abnormal situations to avoid safety risks caused by control failure.

[0060] Next, the working principle of the proposed method for charging a low-voltage automotive battery will be explained using specific embodiments.

[0061] I. Enable Function Prerequisites: The feature is disabled (number of failures = 3). Trigger action: Key power OFF-ON; Action executed: Function enabled (failure count reset to zero; during OFF mode, CEM will automatically wake up every 1 hour to perform detection; function enabled).

[0062] II. Function Activation Prerequisites: Key power ON-OFF for 1 hour || Key power OFF & DC-DC working - off for 1 hour; Trigger action: Detect battery voltage; Action 1: When the battery voltage is ≥12.5V, the charging function is not executed, and the battery goes into hibernation if there are no other wake-up events; after hibernation for 1 hour, the battery voltage is automatically woken up to check whether the charging conditions are met. Action 2: When the battery voltage is <12.5V & SOC>10%, the high voltage is connected. After 15 seconds of sending a request signal, the battery voltage status is judged. If the threshold is met, the charging is considered successful. The timer starts for 2 hours and the battery voltage is continuously monitored.

[0063] III. Function Interruption and Recovery Prerequisite: Power-charging function is activated; Triggering actions: Vehicle enters fast or slow charging mode || Key power OFF-ON || Vehicle receives remote power-on request; Action performed: Power replenishment completed.

[0064] IV. Exiting and Closing Functions Normal exit prerequisite: Power replenishment function is activated; Triggered action: The timer reaches 2 hours after successful power replenishment; Action executed: Power supply completed, high voltage disconnected, vehicle enters sleep mode; Function shutdown trigger action: When the key is continuously OFF, the consecutive failure count reaches 3 times; Action performed: Function disabled.

[0065] The fault handling strategy includes: I. Prerequisites: The test shows that the power replenishment conditions are met. Trigger action: High voltage or DC-DC fault detected, unable to activate intelligent power replenishment; Actions performed: 1. After the power replenishment is completed, the failure count is incremented by 1, the vehicle goes into sleep mode, and after 1 hour of sleep mode, it will automatically wake up to check the battery voltage. The failure count will be 3. The vehicle will be in 0FF mode, and no further self-wake-up checks will occur during this period. 2. If the number of failures is 3, the counter will be reset to zero when the key power is OFF-ON.

[0066] II. Prerequisites: The charging function is activated and the timer has not reached 2 hours. Trigger action: The battery voltage is detected to be <13V for a period of time (2s); Actions performed: Upon completion of power replenishment, increment the failure count by 1, put the vehicle into sleep mode, and wake up after 1 hour to check the battery voltage. If the failure count is 3, the self-wake-up check will not occur again during the OFF position. If the failure count is 3, turn the key power OFF-ON and reset the count to zero.

[0067] III. Prerequisites: The charging function is activated and the timer is set to 2 hours. Trigger action: Battery voltage <13V detected; Actions executed: After the power replenishment is completed, the failure count is incremented by 1, the vehicle goes into sleep mode, and after 1 hour of sleep mode, it will automatically wake up to check the battery voltage. The failure count will be 3. During the OFF position, no further self-wake-up checks will occur. When the failure count is 3, the key power is switched from OFF to ON, and the count is reset to zero.

[0068] Status reporting & App reminders When the function is enabled, the prerequisite for function activation is that the power replenishment function is active. The actions performed include real-time uploading of control signals for the start and end of intelligent power replenishment, battery voltage status signals, actual relay connection status, DC-DC working status, and actual connection status of the main positive and main negative relays. The prerequisite for reporting abnormal charging status is that the key power is OFF. The trigger action is 3 consecutive charging failures. When the charging is activated, if the battery voltage is less than 11.5V, the action is: the APP notifies the user that the vehicle status is abnormal and to go to the repair station for inspection as soon as possible.

[0069] The low-voltage battery charging control method for automobiles proposed in this application involves periodically waking up the vehicle domain controller when the vehicle key is in the OFF position to detect the state of charge or voltage of the low-voltage battery. Based on preset three-level thresholds, different levels of charging strategies are dynamically triggered to specifically charge the low-voltage battery. If charging fails, the system prompts the user to visit a repair shop as soon as possible, ensuring vehicle safety. This highly intelligent method extends the lifespan of the low-voltage battery. Therefore, it solves the problems of related technologies lacking a graded response mechanism, failing to dynamically adjust charging strategies and power load management according to the battery's degree of depletion, and failing to promptly issue warnings to users via remote terminals when charging fails or the battery is severely depleted.

[0070] Next, referring to the accompanying drawings, a charging control device for automotive low-voltage batteries according to an embodiment of this application is described.

[0071] Figure 3 This is a schematic diagram of the structure of the charging control device for a low-voltage automotive battery according to an embodiment of this application.

[0072] like Figure 3 As shown, the low-voltage battery charging control device 10 for automobiles includes: a detection module 100, a judgment module 200, and a charging control module 300.

[0073] Specifically, the detection module 100 is used to detect the state of charge of the car's low-voltage battery when the car key power is off.

[0074] The judgment module 200 is used to determine whether the low-voltage battery of the vehicle meets the preset charging conditions based on the state of charge.

[0075] The charging control module 300 is used to trigger a first-level charging signal to charge the low-voltage battery of the vehicle when the state of charge is lower than a first preset threshold, provided that the low-voltage battery of the vehicle meets the preset charging conditions; to trigger a second-level charging signal to charge the low-voltage battery of the vehicle when the state of charge is lower than a second preset threshold; and to trigger a third-level charging signal to control the electrical load of the vehicle and provide emergency charging for the low-voltage battery of the vehicle when the state of charge is lower than a third preset threshold.

[0076] Optionally, in one embodiment of this application, the charging control device 10 for the low-voltage battery of the vehicle further includes a recording module and a prompting module.

[0077] The recording module is used to record the number of times the low-voltage battery of a vehicle fails to be charged after emergency charging, when the low-voltage battery meets the preset charging failure conditions.

[0078] The notification module is used to push notification information to the user via a preset terminal when the number of failed charging attempts reaches a preset number, so as to notify the user of the abnormal status of the vehicle.

[0079] Optionally, in one embodiment of this application, the charging control device 10 for the low-voltage battery of the vehicle further includes a re-detection module.

[0080] The re-detection module is used to control the low-voltage battery to go into sleep mode and restart the timer when the low-voltage battery does not meet the preset charging conditions after determining whether the low-voltage battery meets the preset charging conditions based on the state of charge. The timer continues until the preset detection time is reached, at which point the state of charge of the low-voltage battery is re-detected.

[0081] Optionally, in one embodiment of this application, the power replenishment control module 300 includes a triggering unit and a first-level power replenishment unit.

[0082] The triggering unit is used to trigger a first-level charging signal when the state of charge of the vehicle's low-voltage battery is lower than a first preset threshold.

[0083] The primary charging unit is used to charge the vehicle's low-voltage battery in response to the primary charging signal, based on the current voltage state of the vehicle's low-voltage battery.

[0084] Optionally, in one embodiment of this application, the power replenishment control module 300 includes: a transmitting unit and a secondary power replenishment unit.

[0085] The sending unit is used to send a high-voltage power-on request to the battery management system using the vehicle controller when the state of charge of the low-voltage battery of the vehicle is lower than a second preset threshold.

[0086] The secondary power replenishment unit is used to activate the DC-DC converter to convert the electrical energy of the high-voltage battery into DC power that meets preset conditions after receiving a high-voltage power-on request, so as to replenish the low-voltage battery of the vehicle.

[0087] Optionally, in one embodiment of this application, the power replenishment control module 300 includes: a startup unit and a three-level power replenishment unit.

[0088] The starting unit is used to trigger a three-level power replenishment signal to start the three-level emergency power replenishment mode when the state of charge of the low-voltage battery is lower than the third preset threshold.

[0089] The three-level power replenishment unit is used to limit the electrical loads that meet preset non-essential conditions when starting the vehicle based on the three-level emergency power replenishment mode, so as to provide emergency power replenishment for the vehicle's low-voltage battery. The electrical loads that meet the preset non-essential conditions include at least one of ambient lights, electric tailgate and vehicle refrigerator.

[0090] Optionally, in one embodiment of this application, the charging control device 10 for the low-voltage battery of the vehicle further includes an acquisition module and a monitoring module.

[0091] The acquisition module is used to acquire the charging start signal, the end control signal, the battery voltage status signal, the actual connection status of the relays, the working status of the DC-DC converter, and the actual connection status of the main positive and main negative relays of the vehicle's low-voltage battery.

[0092] The monitoring module is used to upload the charging start signal, the end control signal, the battery voltage status signal, the actual connection status of the relays, the working status of the DC-DC converter, and the actual connection status of the main positive and main negative relays to the remote platform in order to monitor the execution status of the vehicle's low-voltage battery during the charging process.

[0093] It should be noted that the explanation of the above-described embodiment of the charging control method for automotive low-voltage batteries also applies to the charging control device for automotive low-voltage batteries in this embodiment, and will not be repeated here.

[0094] The low-voltage battery charging control device for automobiles proposed in this application periodically wakes up the vehicle domain controller when the vehicle key is in the OFF position to detect the state of charge or voltage of the low-voltage battery. Based on preset three-level thresholds, it dynamically triggers different levels of charging strategies to specifically charge the low-voltage battery. If charging fails, it prompts the user to go to a repair shop as soon as possible, ensuring vehicle safety. This highly intelligent device extends the lifespan of the low-voltage battery. Therefore, it solves the problems of related technologies lacking a graded response mechanism, failing to dynamically adjust charging strategies and power load management according to the degree of battery depletion, and failing to promptly issue warnings to users via remote terminals when charging fails or the battery is severely depleted.

[0095] Figure 4 A schematic diagram of the structure of a vehicle provided in an embodiment of this application. The vehicle may include: The memory 401, the processor 402, and the computer program stored on the memory 401 and capable of running on the processor 402.

[0096] When the processor 402 executes the program, it implements the battery charging control method for automobile low-voltage batteries provided in the above embodiments.

[0097] Furthermore, the vehicle also includes: Communication interface 403 is used for communication between memory 401 and processor 402.

[0098] The memory 401 is used to store computer programs that can run on the processor 402.

[0099] Memory 401 may include high-speed RAM memory, and may also include non-volatile memory, such as at least one disk storage device.

[0100] If the memory 401, processor 402, and communication interface 403 are implemented independently, then the communication interface 403, memory 401, and processor 402 can be interconnected via a bus to complete communication between them. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized into address buses, data buses, control buses, etc. For ease of representation, Figure 4 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0101] Optionally, in a specific implementation, if the memory 401, processor 402, and communication interface 403 are integrated on a single chip, then the memory 401, processor 402, and communication interface 403 can communicate with each other through an internal interface.

[0102] Processor 402 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of this application.

[0103] This embodiment also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described method for charging a low-voltage automotive battery.

[0104] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0105] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "N" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0106] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or N executable instructions for implementing custom logic functions or processes, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as should be understood by those skilled in the art to which embodiments of this application pertain.

[0107] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Alternatively, the computer-readable medium may be paper or other suitable media on which the program can be printed, since the program can be obtained electronically by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory.

[0108] It should be understood that the various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, the N steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0109] Those skilled in the art will understand that all or part of the steps of the methods in the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, the program includes one or a combination of the steps of the method embodiments.

[0110] Furthermore, the functional units in the various embodiments of this application can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into a module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.

[0111] The storage medium mentioned above can be a read-only memory, a disk, or an optical disk, etc. Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application.

Claims

1. A method for controlling the charging of a low-voltage automotive battery, characterized in that, Includes the following steps: With the car key power off, check the state of charge of the car's low-voltage battery. Determine whether the vehicle's low-voltage battery meets the preset charging conditions based on the state of charge. If the vehicle's low-voltage battery meets the preset charging conditions, a first-level charging signal is triggered when the state of charge is lower than a first preset threshold to charge the vehicle's low-voltage battery. When the state of charge is lower than a second preset threshold, a second-level charging signal is triggered to link the high-voltage battery to charge the vehicle's low-voltage battery. When the state of charge is lower than a third preset threshold, a third-level charging signal is triggered to control the vehicle's electrical load and provide emergency charging for the vehicle's low-voltage battery.

2. The method according to claim 1, characterized in that, After providing emergency power to the vehicle's low-voltage battery, the process also includes: When the vehicle's low-voltage battery meets the preset charging failure conditions, the number of charging failures is recorded. When the number of failed charging attempts reaches a preset number, a notification message will be pushed to the user via a preset terminal to indicate the abnormal status of the vehicle.

3. The method according to claim 1, characterized in that, After determining whether the vehicle's low-voltage battery meets the preset charging conditions based on the state of charge, the process further includes: If the vehicle's low-voltage battery does not meet the preset charging conditions, the vehicle's low-voltage battery is put into sleep mode, and the timer is restarted until the preset detection time is reached, at which point the state of charge of the vehicle's low-voltage battery is re-detected.

4. The method according to claim 1, characterized in that, The step of triggering a first-level charging signal to charge the vehicle's low-voltage battery when the state of charge is below a first preset threshold includes: When the state of charge of the vehicle's low-voltage battery is lower than the first preset threshold, the first-level charging signal is triggered. In response to the first-level charging signal, the vehicle low-voltage battery is charged according to its current voltage state.

5. The method according to claim 1, characterized in that, When the state of charge is lower than a second preset threshold, a secondary charging signal is triggered to link the high-voltage battery to charge the vehicle's low-voltage battery, including: When the state of charge of the vehicle's low-voltage battery is lower than the second preset threshold, the vehicle controller sends a high-voltage power-on request to the battery management system. Upon receiving the high-voltage power-on request, the DC-DC converter is activated to convert the electrical energy of the high-voltage battery into DC power that meets preset conditions, in order to replenish the low-voltage battery of the vehicle.

6. The method according to claim 1, characterized in that, When the state of charge is below a third preset threshold, a three-level replenishment signal is triggered to control the vehicle's electrical load and provide emergency replenishment to the vehicle's low-voltage battery, including: When the state of charge of the low-voltage battery is lower than the third preset threshold, the triggering of the three-level emergency power replenishment signal is activated to start the three-level emergency power replenishment mode. Based on the three-level emergency power replenishment mode, the starting of electrical loads that meet preset non-essential conditions is restricted in order to provide emergency power replenishment to the vehicle's low-voltage battery. The electrical loads that meet the preset non-essential conditions include at least one of ambient lighting, electric tailgate, and vehicle refrigerator.

7. The method according to claim 1, characterized in that, Also includes: Acquire the charging start signal, end control signal, battery voltage status signal, actual relay connection status, DC-DC converter operating status, and actual connection status of the main positive and main negative relays of the vehicle's low-voltage battery; The charging start signal, the end control signal, the battery voltage status signal, the actual connection status of the relay, the working status of the DC-DC converter, and the actual connection status of the main positive and main negative relays are uploaded to a remote platform to monitor the execution status of the vehicle's low-voltage battery during the charging process.

8. A charging control device for a low-voltage automotive battery, characterized in that, include: The detection module is used to detect the state of charge of the car's low-voltage battery when the car key power is off. The judgment module is used to determine whether the vehicle low-voltage battery meets the preset charging conditions based on the state of charge. The power replenishment control module is used to trigger a first-level power replenishment signal to replenish the low-voltage battery of the vehicle when the state of charge is lower than a first preset threshold, provided that the low-voltage battery of the vehicle meets the preset power replenishment conditions; to trigger a second-level power replenishment signal to link the high-voltage battery to replenish the low-voltage battery of the vehicle when the state of charge is lower than a second preset threshold; and to trigger a third-level power replenishment signal to control the electrical load of the vehicle and provide emergency power replenishment to the low-voltage battery of the vehicle when the state of charge is lower than a third preset threshold.

9. A vehicle, characterized in that, include: A memory, a processor, and a computer program stored in the memory and executable on the processor, the processor executing the program to implement the charging control method for a low-voltage automotive battery as described in any one of claims 1-7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, The program is executed by the processor to implement the method for charging a low-voltage automotive battery as described in any one of claims 1-7.

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