Intelligent charging method and device for low-voltage battery, electronic equipment and storage medium

Abstract

The invention provides an intelligent charging method and device for a low-voltage battery, electronic equipment and a storage medium, and can be applied to the technical field of electric vehicles. The method is applied to a vehicle-mounted terminal TBOX, and comprises the following steps: under the condition that a vehicle is in a dormant state, monitoring the voltage of a low-voltage battery on the vehicle so as to collect the real-time voltage of the low-voltage battery; if the real-time voltage is smaller than the first dynamic threshold value, the low-voltage battery is charged; wherein the first dynamic threshold value is determined based on the initial voltage of the low-voltage battery when the vehicle enters the dormant state. According to the method, the dynamic threshold value is set, the voltage of the low-voltage battery is monitored in real time for charging, and the low-voltage battery can be effectively prevented from being lack of electricity.

Description

Technical Field

[0001] The present application relates to the technical field of electric vehicles, and in particular to a low-voltage battery intelligent power replenishment method, device, electronic device and storage medium. Background Art

[0002] The low-voltage battery of an electric vehicle is the power source used to start the vehicle and power the on-board electronic equipment. When the vehicle starts, the low-voltage battery is needed to control the high-voltage battery to supply power to electrical devices and appliances.

[0003] Low-voltage battery depletion refers to the state where the low-voltage battery is insufficient or exhausted, that is, the battery cannot provide sufficient power for the vehicle or on-board equipment. Therefore, in order to prevent the low-voltage battery from depleting, existing electric vehicles are generally equipped with low-voltage battery charging solutions.

[0004] However, the existing low-voltage battery charging solutions generally adopt a timed charging method, which has the problem of untimely charging. Summary of the invention

[0005] The present application provides a low-voltage battery intelligent charging method, device, electronic device and storage medium, which are used to solve the technical problem of untimely charging of existing low-voltage batteries.

[0006] According to the first aspect disclosed in the present application, the present application provides a low-voltage battery intelligent charging method, which is applied to a vehicle-mounted terminal TBOX, comprising:

[0007] When the vehicle is in a dormant state, monitoring the voltage of the low-voltage battery on the vehicle to collect the real-time voltage of the low-voltage battery;

[0008] If the real-time voltage is less than a first dynamic threshold, the low-voltage battery is recharged; wherein the first dynamic threshold is determined based on an initial voltage of the low-voltage battery when the vehicle enters a dormant state.

[0009] In a feasible implementation manner, the method further includes:

[0010] Periodically triggering a preset timer and determining whether the low-voltage battery is overcharged within the timing range of the timer;

[0011] If the low-voltage battery has not been recharged within the timing range of the timer, the low-voltage battery is recharged.

[0012] In a feasible implementation manner, before the low-voltage battery is recharged, the method further includes:

[0013] Based on the initial voltage, determine a second dynamic threshold; wherein, the second dynamic threshold is less than the first dynamic threshold;

[0014] If the real-time voltage is not greater than the second dynamic threshold, determine that the charging duration of the low-voltage battery is a first duration;

[0015] If the real-time voltage is greater than the second dynamic threshold and not greater than the first dynamic threshold, determine that the charging duration is a second duration;

[0016] If the real-time voltage is greater than the first dynamic threshold, determine that the charging duration is a third duration; wherein, the third duration, the second duration, and the first duration increase in sequence.

[0017] In a feasible implementation manner, the first dynamic threshold satisfies the following formula:

[0018] Vth1 = a·Vc

[0019] Wherein, Vth1 represents the first dynamic threshold, Vc represents the initial voltage, a represents a coefficient, and 0 < a < 1;

[0020] The second dynamic threshold satisfies the following formula:

[0021] Vth2 = b·Vc

[0022] Wherein, Vth2 represents the second dynamic threshold, b represents a coefficient, 0 < b < 1 and a > b.

[0023] In a feasible implementation manner, the method further includes:

[0024] After the continuous charging time of the low-voltage battery reaches a preset shortest charging duration, monitor whether the vehicle meets a preset charging termination condition;

[0025] If the vehicle meets any one of the charging termination conditions, stop charging the low-voltage battery;

[0026] Wherein, the charging termination conditions include:

[0027] The vehicle is in a wake-up state;

[0028] The vehicle triggers a maintenance signal or a charging signal;

[0029] The VBAT voltage of the vehicle is greater than a preset threshold and remains for a preset duration, and the output current of the DC controller of the vehicle is less than a preset threshold;

[0030] The state of charge (SOC) of the power battery on the vehicle is less than a preset safe charging value;

[0031] The maximum fault level of the vehicle's DCDC converter, power management system BMS or vehicle controller VCU is not less than a preset level;

[0032] The vehicle continues to lose feedback messages from the DCDC converter within a preset time period;

[0033] The continuous charging time of the low-voltage battery is greater than a preset maximum charging time.

[0034] In a feasible implementation manner, the method further includes:

[0035] Determining an exit condition satisfied by the vehicle, and generating abnormal reminder information based on the exit condition;

[0036] The abnormal reminder information is sent to the user terminal.

[0037] In a feasible implementation manner, before the low-voltage battery is recharged, the method further includes:

[0038] Determining whether the vehicle meets a preset condition for entering the power replenishment mode;

[0039] If the vehicle meets all the entry conditions in the entry charging condition, charging the low-voltage battery;

[0040] The conditions for entering the power replenishment phase include:

[0041] The vehicle is in a dormant state;

[0042] The vehicle does not trigger a maintenance signal or a charging signal;

[0043] The SOC of the power battery on the vehicle is greater than a preset safe charging value;

[0044] The maximum fault level of the vehicle's DCDC converter, power management system BMS and vehicle controller VCU is less than a preset level;

[0045] The vehicle does not lose feedback messages from the DCDC converter, the power management system BMS and the vehicle controller VCU within a preset time period.

[0046] According to the second aspect disclosed in the present application, the present application provides a low-voltage battery intelligent charging device, which is applied to a vehicle-mounted terminal TBOX, including:

[0047] A voltage monitoring module, used to monitor the voltage of a low-voltage battery on the vehicle when the vehicle is in a dormant state, so as to collect the real-time voltage of the low-voltage battery;

[0048] A charging control module is used to charge the low-voltage battery if the real-time voltage is less than a first dynamic threshold; wherein the first dynamic threshold is determined based on the initial voltage of the low-voltage battery when the vehicle enters a dormant state.

[0049] According to a third aspect disclosed in the present application, the present application provides an electronic device, including a processor, and a memory communicatively connected to the processor;

[0050] The memory stores computer-executable instructions;

[0051] The processor executes the computer-executable instructions stored in the memory to implement the method according to any one of the first aspects.

[0052] According to the fourth aspect disclosed in the present application, the present application provides a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed, they are used to implement any method in the first aspect.

[0053] According to a fifth aspect disclosed in the present application, the present application provides a computer program product, including a computer program, and when the computer program is executed, it is used to implement any one of the methods in the first aspect.

[0054] Compared with the prior art, this application has the following beneficial effects:

[0055] The present application provides a low-voltage battery intelligent charging method, device, electronic device and storage medium, which sets a dynamic threshold by obtaining the power consumption of the low-voltage battery when the vehicle enters a dormant state, and continuously monitors the voltage of the low-voltage battery, so that the low-voltage battery can obtain real-time charging when its real-time voltage is lower than the dynamic threshold. In this way, the low-voltage battery can be charged in time using the real-time charging decision, effectively preventing the low-voltage battery from running out of power.

[0056] In addition, the use of dynamic thresholds for recharging decisions can also prevent the voltage sampling value from changing due to long-term use of the battery, which in turn makes it impossible to effectively compare the voltage of the low-voltage battery with the fixed threshold, resulting in the inability to trigger recharging and causing the low-voltage battery to be depleted. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0058] Figure 1 A schematic diagram of a low-voltage battery intelligent charging method provided in an embodiment of the present application;

[0059] Figure 2A schematic diagram of a process flow of another low-voltage battery intelligent charging method provided in an embodiment of the present application;

[0060] Figure 3 A schematic diagram of the structure of a low-voltage battery intelligent charging device provided in an embodiment of the present application;

[0061] Figure 4 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application.

[0062] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0063] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0064] The low-voltage battery of an electric vehicle is used to start the vehicle and power the onboard electronic equipment. When the vehicle is started, the low-voltage battery is needed to control the high-voltage battery to supply power to the electrical equipment and appliances. As electric vehicle technology becomes more mature, combined with the inevitable trend of networking, intelligence, and electrification, more and more controllers and accessories are added to the vehicle, resulting in an increasing static current consumption of the vehicle.

[0065] Low-voltage battery depletion refers to the state where the low-voltage battery is low or exhausted, that is, the battery cannot provide enough power for the vehicle or on-board equipment. When the low-voltage battery is depleted, it may not be able to provide enough power for the starter motor, causing the vehicle to fail to start. Low-voltage battery depletion can also affect the normal operation of on-board equipment, such as driving recorders, car networking communication equipment, etc. The failure of these devices to work properly may affect driving safety and driving experience.

[0066] Therefore, in order to prevent the low-voltage battery from running out of power, existing electric vehicles are generally equipped with intelligent charging solutions. The existing intelligent charging methods usually include the following steps:

[0067] 1. Regularly collect the voltage of the low-voltage battery and set the voltage threshold for replenishment;

[0068] 2. Compare the collected voltage with the set voltage threshold and vehicle status to decide whether to trigger intelligent charging;

[0069] 3. After the recharging conditions are met, the vehicle controller VCU usually issues a high-voltage command, and the power management system BMS and DC controller respond to implement the high-voltage process to charge the low-voltage battery.

[0070] Since this method sets a fixed voltage threshold and uses timed monitoring, the following problems occur:

[0071] 1. Regular power replenishment may result in untimely power replenishment;

[0072] 2. Set a fixed threshold. If the battery is used for a long time, the voltage sampling may be inaccurate, and the battery may not be replenished.

[0073] 3. Lack of troubleshooting mechanism.

[0074] In response to the above technical problems, the present application proposes a low-voltage battery intelligent charging method, which can effectively prevent the low-voltage battery from running out of power by setting a dynamic threshold and monitoring the low-voltage battery voltage in real time for charging.

[0075] The technical solution of the low-voltage battery intelligent charging method provided by the present application is described in detail below through specific embodiments. It should be noted that the following embodiments can exist alone or in combination with each other, and the same or similar contents may not be repeated in different embodiments.

[0076] It should be noted that the executor of the low-voltage battery intelligent charging method provided in the embodiment of the present application is the vehicle-mounted terminal TBOX, and accordingly, the low-voltage battery intelligent charging device is also arranged in the low-voltage battery charging.

[0077] Specifically, TBOX (Telematics Box, Internet of Vehicles system) is the core controller of vehicle informatization. It communicates with the entire vehicle through CAN and Ethernet to obtain real-time vehicle information, including real-time fuel consumption, engine water temperature, engine speed, vehicle mileage, current speed, battery voltage, etc.

[0078] By utilizing the on-board terminal TBOX to integrate all the intelligent charging on and off logic, rather than just a functional switch, it can ensure that other electronic control units ECU of the vehicle remain in a dormant state when charging is not required, effectively reducing the static power consumption of the entire vehicle.

[0079] Figure 1 A schematic diagram of a low-voltage battery intelligent charging method provided in an embodiment of the present application is provided. Figure 1 In some embodiments, the low-voltage battery intelligent charging method is applied to the vehicle-mounted terminal TBOX, and the process includes the following steps:

[0080] S101, when the vehicle is in a dormant state, monitoring the voltage of a low-voltage battery on the vehicle to collect the real-time voltage of the low-voltage battery.

[0081] If the vehicle is in normal working condition, the low-voltage battery may continue to discharge due to various loads, which will affect its charging effect. Charging in the dormant state of the vehicle can ensure that the low-voltage battery is charged in a relatively static state, which is conducive to the full charging and long-term protection of the low-voltage battery.

[0082] S102, if the real-time voltage is less than a first dynamic threshold, the low-voltage battery is recharged; wherein the first dynamic threshold is determined based on an initial voltage of the low-voltage battery when the vehicle enters a dormant state.

[0083] When the vehicle enters the dormant state, the initial voltage of the low-voltage battery on the vehicle is collected, and the first dynamic threshold is determined based on the initial voltage as the judgment condition for this power replenishment. Subsequently, when the real-time voltage of the low-voltage battery is less than the first dynamic threshold, the low-voltage battery is recharged.

[0084] Specifically, entering the dormant state refers to the state when the vehicle power gear is switched from ON to OFF and the DC controller of the vehicle stops working. Correspondingly, the vehicle is in the dormant state when the vehicle power gear is in OFF.

[0085] In this embodiment, a dynamic threshold is set by obtaining the power consumption of the low-voltage battery when the vehicle enters the dormant state, and the voltage of the low-voltage battery is continuously monitored, so that the low-voltage battery can be replenished in real time when its real-time voltage is lower than the dynamic threshold. In this way, the low-voltage battery can be replenished in time using the real-time replenishment decision, effectively preventing the low-voltage battery from running out of power.

[0086] In addition, the use of dynamic thresholds for recharging decisions can also prevent the voltage sampling value from changing due to long-term use of the battery, which in turn makes it impossible to effectively compare the voltage of the low-voltage battery with the fixed threshold, resulting in the inability to trigger recharging and causing the low-voltage battery to be depleted.

[0087] exist Figure 1 Based on the embodiment shown, the following Figure 2 , the technical solution of the above-mentioned low-voltage battery intelligent charging method is further introduced.

[0088] Figure 2 A flow chart of another low-voltage battery intelligent charging method provided in the embodiment of the present application is shown in FIG. Figure 2 In some embodiments, the process of the low-voltage battery intelligent charging method includes the following steps:

[0089] S201, when the vehicle enters a dormant state, collecting the initial voltage of the low-voltage battery on the vehicle.

[0090] When the vehicle enters the dormant state, the current initial voltage of the low-voltage battery on the vehicle is collected for use in determining the subsequent dynamic threshold.

[0091] S202: Determine a first dynamic threshold based on the initial voltage.

[0092] Wherein, the first dynamic threshold is determined based on the collected initial voltage.

[0093] S203, when the vehicle is in a dormant state, monitoring the voltage of the low-voltage battery on the vehicle to collect the real-time voltage of the low-voltage battery.

[0094] Among them, when the vehicle is in a dormant state, the voltage of the low-voltage battery on the vehicle is continuously monitored, and the real-time voltage of the low-voltage battery is collected.

[0095] Preferably, real-time acquisition of the real-time voltage of the low-voltage battery includes:

[0096] Step 1: Collect multiple voltage data to obtain a voltage set.

[0097] Step 2: Filter outliers in the voltage set.

[0098] Step 3, calculate the average value of multiple voltage data in the voltage set to obtain the real-time voltage.

[0099] Among them, through the above data processing method, the collected abnormal voltage data can be eliminated and a more accurate real-time voltage can be obtained, which is conducive to improving the accuracy of subsequent power replenishment judgment.

[0100] S204: If the real-time voltage is less than the first dynamic threshold, determine whether the vehicle meets the preset conditions for entering the power replenishment.

[0101] Among them, if the real-time voltage is less than the first dynamic threshold, it is further determined whether the vehicle meets the preset conditions for entering the power replenishment to ensure that the vehicle can normally replenish the low-voltage battery.

[0102] Among them, the conditions for entering the power replenishment include:

[0103] Entering condition 1, the vehicle is in dormant state.

[0104] Among them, when the vehicle is in a dormant state, that is, the vehicle is not driving or in use, the vehicle's electrical load will not affect the low-voltage battery, and the power battery can be used to recharge the low-voltage battery.

[0105] Entering condition 2, the vehicle does not trigger the maintenance signal and charging signal.

[0106] Among them, the vehicle did not trigger the maintenance signal and charging signal, indicating that the vehicle is operating normally, there is no fault or abnormality, and the vehicle is not in the charging state, and the low-voltage battery can be recharged.

[0107] Enter condition 3: the SOC of the vehicle's power battery is greater than the preset safe charging value.

[0108] Among them, the SOC (State of Charge, i.e. the battery's charging state, also known as the remaining power, which indicates the percentage of remaining power in the battery) of the power battery is greater than the safe charging value, indicating that the remaining power of the power battery can meet the charging needs of the low-voltage battery and the low-voltage battery can be charged.

[0109] Entering condition 4, the highest fault level of the vehicle's DCDC converter, power management system BMS and vehicle controller VCU is less than the preset level.

[0110] Among them, the highest fault level of the vehicle's DCDC converter, power management system BMS and vehicle controller VCU indicates the severity and impact scope of the fault. If it is less than the preset level, it means that the fault is not serious and the low-voltage battery can be recharged.

[0111] Specifically, the fault level is generally divided into three levels, including: level 1 fault (minor), level 2 fault (moderate), and level 3 fault (serious). For example, when the preset level is set to level 3, low-voltage battery recharging can only be performed when the highest fault levels of the vehicle's DCDC converter, power management system BMS, and vehicle controller VCU are all less than level 3.

[0112] Entering condition 5, the vehicle does not lose the feedback message from the DCDC converter, the power management system BMS and the vehicle controller VCU within the preset time period.

[0113] Among them, if the vehicle does not lose the feedback messages from the DCDC converter, power management system BMS and vehicle controller VCU within the preset time period, it means that the relevant equipment responsible for the charging operation feeds back information normally and operates normally, and the low-voltage battery can be charged.

[0114] Correspondingly, if the real-time voltage is not less than the first dynamic threshold, the low-voltage battery is not recharged.

[0115] S205: If the vehicle meets all the entry conditions in the charging condition, the low-voltage battery is charged.

[0116] Among them, only when the vehicle meets all the entry conditions in the above-mentioned charging conditions can it be ensured that the vehicle can normally charge the low-voltage battery, and the charging operation will be performed subsequently.

[0117] Preferably, before charging the low-voltage battery, it is also necessary to determine the charging duration of the low-voltage battery, specifically including:

[0118] Step 1: Determine the second dynamic threshold based on the initial voltage; wherein, the second dynamic threshold is less than the first dynamic threshold.

[0119] Among them, a second dynamic threshold smaller than the first dynamic threshold is further determined according to the initial voltage.

[0120] Step 2: If the real-time voltage is not greater than the second dynamic threshold, determine that the charging duration of the low-voltage battery is the first duration.

[0121] Specifically, the first duration is T1.

[0122] Step 3: If the real-time voltage is greater than the second dynamic threshold and not greater than the first dynamic threshold, determine that the charging duration is the second duration.

[0123] Specifically, the second duration is T2.

[0124] Step 4: If the real-time voltage is greater than the first dynamic threshold, determine that the charging duration is the third duration; wherein, the third duration, the second duration, and the first duration increase in sequence.

[0125] Specifically, the third duration is T3. And T3 < T2 < T1.

[0126] Among them, by judging the magnitude relationship between the real-time voltage and the dynamic threshold, the charging duration of the low-voltage battery is dynamically determined. The lower the voltage of the low-voltage battery, the longer the charging duration, so as to adapt to different charging scenarios.

[0127] Specifically, the first dynamic threshold satisfies the following formula:

[0128] Vth1 = a·Vc

[0129] Wherein, Vth1 represents the first dynamic threshold, Vc represents the initial voltage, a represents a coefficient, and 0 < a < 1;

[0130] The second dynamic threshold satisfies the following formula:

[0131] Vth2 = b·Vc

[0132] Wherein, Vth2 represents the second dynamic threshold, b represents a coefficient, 0 < b < 1 and a > b.

[0133] Preferably, the charging process of the low-voltage battery specifically includes:

[0134] Step 1, wake up the vehicle's DCDC converter, power management system BMS and vehicle controller VCU, and receive response messages from the DCDC converter, power management system BMS and vehicle controller VCU;

[0135] Step 2: If response messages are received from the DCDC converter, the power management system BMS and the vehicle controller VCU, a power replenishment request message is sent to the vehicle controller VCU, so that the vehicle controller VCU sends a high-voltage instruction to the power management system BMS, the DC controller and the DCDC converter after receiving the power replenishment request message; wherein the power replenishment request message carries the power replenishment duration, and the high-voltage instruction is used to instruct the vehicle's power management system BMS, the DC controller and the DCDC converter to execute the high-voltage process to charge the low-voltage battery.

[0136] S206, periodically triggering a preset timer, and determining whether the low-voltage battery is overcharged within the timing range of the timer.

[0137] Wherein, by means of periodically triggering a timer, it is regularly detected whether real-time power replenishment is triggered within the timing range of the timer to replenish the power of the low-voltage battery.

[0138] Specifically, whether the low-voltage battery has been recharged can be determined by detecting whether a recharge request message has been sent within the timing range of the timer. If the vehicle-mounted terminal TBOX has not sent a recharge request message to the vehicle controller VCU within the timing range of the timer, the low-voltage battery has not been recharged within the timing range of the timer.

[0139] Specifically, the timing range of the timer is set to 1 hour, then every 1 hour, the vehicle terminal TBOX will determine whether the low-voltage battery has been recharged within 1 hour.

[0140] S207: If the low-voltage battery has not been recharged within the timing range of the timer, it is determined whether the vehicle meets the preset conditions for entering the recharging state.

[0141] Among them, if the low-voltage battery has not been recharged within the timing range of the timer, it is necessary to further determine whether the vehicle meets the preset conditions for entering the recharging mode to trigger the subsequent scheduled recharging.

[0142] Correspondingly, if the low-voltage battery has been recharged within the preset period of the timer, it is no longer determined whether the vehicle meets the preset conditions for entering the recharge mode.

[0143] S208: If the vehicle meets all the entry conditions in the charging condition, the low-voltage battery is charged.

[0144] Among them, if the vehicle meets all the entry conditions in the entry power replenishment conditions, the scheduled power replenishment is triggered to replenish the low-voltage battery.

[0145] Through the power replenishment strategy of real-time power replenishment as the main and scheduled power replenishment as the auxiliary, scheduled power replenishment can avoid dynamic threshold decision failures caused by changes in the environment and hardware, and further prevent low-voltage batteries from running out of power by triggering scheduled power replenishment.

[0146] S209, after the continuous charging time of the low-voltage battery reaches a preset minimum charging time, monitoring whether the vehicle meets a preset exit charging condition.

[0147] Among them, after the high-voltage battery is recharged, the continuous recharging time of the low-voltage battery reaches the preset minimum recharging time, and then the vehicle is monitored to see whether it meets the preset exit recharging conditions. The purpose is to avoid frequent entry or exit of recharging in a short period of time, minimize the number of charge and discharge times of the power battery, and extend the battery life.

[0148] S210: If the vehicle meets any of the conditions for exiting the power replenishment, the power replenishment for the low-voltage battery is stopped.

[0149] Among them, if the vehicle meets any of the exit conditions for exiting the power replenishment, it indicates that an abnormal condition has occurred in the vehicle. At this time, it is necessary to stop replenishing the low-voltage battery.

[0150] Among them, the conditions for exiting power replenishment include:

[0151] Exit condition 1: the vehicle is in the awake state.

[0152] Among them, when the vehicle is in the awakening working state, the low-voltage battery may continue to discharge due to various loads, which will affect its charging effect. At this time, it is necessary to stop charging the low-voltage battery.

[0153] Specifically, the awake state refers to the vehicle power gear being in the ON gear state.

[0154] Exit condition 2: the vehicle triggers a maintenance signal or a charging signal.

[0155] Among them, the vehicle triggers a maintenance signal or a charging signal, indicating that the vehicle has a fault or an abnormal condition, or the vehicle is also in a charging state and it is necessary to stop recharging the low-voltage battery.

[0156] Exit condition 3: the VBAT voltage of the vehicle is greater than a preset threshold and remains for a preset time, and the output current of the DC controller of the vehicle is less than a preset threshold.

[0157] Among them, the vehicle's VBAT voltage is greater than the preset threshold and maintained for a preset time, and the output current of the vehicle's DC controller is less than the preset threshold, indicating that the vehicle may have a battery system problem, a DC controller problem or a circuit system problem, and it is necessary to stop recharging the low-voltage battery.

[0158] Exit condition 4: the SOC of the power battery on the vehicle is less than the preset safe charging value.

[0159] Among them, it indicates that the remaining power of the power battery is too small to meet the charging needs of the low-voltage battery, and it is necessary to stop charging the low-voltage battery.

[0160] Exit condition 5: the highest fault level of the vehicle's DCDC converter, power management system BMS or vehicle controller VCU is not less than the preset level.

[0161] Among them, if it is not less than the preset level, it indicates that the fault of the DCDC converter, power management system BMS and vehicle controller VCU is serious, and it is necessary to stop recharging the low-voltage battery.

[0162] Exit condition 6: the vehicle continues to lose the feedback message from the DCDC converter within a preset time period.

[0163] Among them, if the vehicle continues to lose the feedback message of the DCDC converter within a preset time period, it indicates that the DCDC converter is abnormal and it is necessary to stop charging the low-voltage battery.

[0164] Exit condition 7: the continuous charging time of the low-voltage battery is greater than the preset maximum charging time.

[0165] Among them, the continuous charging time of the low-voltage battery is greater than the preset maximum charging time, indicating that the charging time is abnormal and the low-voltage battery needs to be stopped.

[0166] Preferably, the process of stopping charging the low-voltage battery specifically includes:

[0167] A stop power supply message is sent to the vehicle controller VCU, so that after receiving the stop power supply message, the vehicle controller VCU sends a low-voltage instruction to the power management system BMS, DC controller and DCDC converter; wherein the low-voltage instruction is used to instruct the vehicle's power management system BMS, DC controller and DCDC converter to execute the low-voltage process to stop charging the low-voltage battery.

[0168] S211, determining the exit conditions satisfied by the vehicle, and generating abnormal reminder information based on the exit conditions.

[0169] Among them, when the vehicle meets the conditions for exiting the power replenishment, the specific exit conditions that are met are determined, and abnormal reminder information is generated based on the conditional content of the exit conditions.

[0170] Specifically, some examples of abnormal power replenishment reminder information are shown in Table 1.

[0171] Table 1 Example of abnormal power supply reminder information

[0172]

[0173] S212, sending abnormal reminder information to the user terminal.

[0174] Among them, the generated abnormal reminder information is sent to the user terminal, and the fault situation is promptly informed to the user to facilitate the customer to perform maintenance and repairs, thereby improving the user experience.

[0175] S213, if the vehicle does not meet all the exit conditions in the exit charging condition, the low-voltage battery is continuously charged until the continuous charging time of the low-voltage battery is equal to the charging time, and then the low-voltage battery is stopped from being charged.

[0176] Among them, if the vehicle does not meet all the exit conditions in the exit charging conditions, and the vehicle status is normal, the charging time will continue to charge the low-voltage battery until the continuous charging time of the low-voltage battery is equal to the charging time, then stop charging the low-voltage battery and complete the charging operation of the low-voltage battery.

[0177] In this embodiment, by setting relevant conditions for entering and exiting the charging process, as well as abnormality reminders, the safety of low-voltage battery charging is further guaranteed.

[0178] Figure 3 This is a schematic diagram of a low-voltage battery intelligent charging device provided in an embodiment of the present application. Figure 3 The low-voltage battery intelligent charging device includes various functional modules for implementing the aforementioned low-voltage battery intelligent charging method, and any functional module can be implemented by software and / or hardware.

[0179] In some embodiments, the low-voltage battery intelligent charging device 300 includes a voltage monitoring module 301 and a charging control module 302. Among them:

[0180] The voltage monitoring module 301 is used to monitor the voltage of the low-voltage battery on the vehicle when the vehicle is in a dormant state, so as to collect the real-time voltage of the low-voltage battery;

[0181] The charging control module 302 is used to charge the low-voltage battery if the real-time voltage is less than a first dynamic threshold value; wherein the first dynamic threshold value is determined based on the initial voltage of the low-voltage battery when the vehicle enters a dormant state.

[0182] In some embodiments, the power replenishment control module 302 is further configured to:

[0183] Periodically trigger a preset timer and determine whether the low-voltage battery has been charged during the timing range of the timer;

[0184] If the low-voltage battery has not been charged during the timing range of the timer, charge the low-voltage battery.

[0185] In some embodiments, before charging the low-voltage battery, the charging control module 302 is further specifically configured to:

[0186] Based on the initial voltage, determine a second dynamic threshold; wherein, the second dynamic threshold is less than the first dynamic threshold;

[0187] If the real-time voltage is not greater than the second dynamic threshold, determine that the charging duration of the low-voltage battery is the first duration;

[0188] If the real-time voltage is greater than the second dynamic threshold and not greater than the first dynamic threshold, determine that the charging duration is the second duration;

[0189] If the real-time voltage is greater than the first dynamic threshold, determine that the charging duration is the third duration; wherein, the third duration, the second duration, and the first duration increase in sequence.

[0190] In some embodiments, the first dynamic threshold satisfies the following formula:

[0191] Vth1 = a·Vc

[0192] Wherein, Vth1 represents the first dynamic threshold, Vc represents the initial voltage, a represents a coefficient, and 0 < a < 1;

[0193] The second dynamic threshold satisfies the following formula:

[0194] Vth2 = b·Vc

[0195] Wherein, Vth2 represents the second dynamic threshold, b represents a coefficient, 0 < b < 1 and a > b.

[0196] In some embodiments, the charging control module 302 is further specifically configured to:

[0197] After the continuous charging time of the low-voltage battery reaches the preset shortest charging duration, monitor whether the vehicle meets the preset charging exit condition;

[0198] If the vehicle meets any one of the charging exit conditions, stop charging the low-voltage battery;

[0199] Among them, the charging exit conditions include:

[0200] The vehicle is in a wake-up state;

[0201] The vehicle triggers a maintenance signal or a charging signal;

[0202] The VBAT voltage of the vehicle is greater than a preset threshold and remains for a preset time, and the output current of the DC controller of the vehicle is less than a preset threshold;

[0203] The SOC of the vehicle's power battery is less than the preset safe charging value;

[0204] The maximum fault level of the vehicle's DCDC converter, power management system BMS or vehicle controller VCU is not less than the preset level;

[0205] The vehicle continues to lose feedback messages from the DCDC converter within a preset time period;

[0206] The continuous charging time of the low-voltage battery is greater than the preset maximum charging time.

[0207] In some embodiments, the power replenishment control module 302 is further configured to:

[0208] Determine the exit conditions satisfied by the vehicle and generate abnormal reminder information based on the exit conditions;

[0209] Send abnormal reminder information to the user terminal.

[0210] In some embodiments, before recharging the low-voltage battery, the recharging control module 302 is further configured to:

[0211] Determine whether the vehicle meets the preset conditions for entering the power replenishment mode;

[0212] If the vehicle meets all the entry conditions in the charging conditions, the low-voltage battery is charged;

[0213] Among them, the conditions for entering the power replenishment include:

[0214] The vehicle is in dormant mode;

[0215] The vehicle does not trigger the maintenance signal and charging signal;

[0216] The SOC of the vehicle's power battery is greater than the preset safe charging value;

[0217] The maximum fault level of the vehicle's DCDC converter, power management system BMS and vehicle controller VCU is less than the preset level;

[0218] The vehicle does not lose feedback messages from the DCDC converter, power management system BMS and vehicle controller VCU within the preset time period.

[0219] The low-voltage battery intelligent charging device 300 provided in the embodiment of the present application is used to execute the technical solution provided in the aforementioned low-voltage battery intelligent charging method embodiment. Its implementation principle and technical effect are similar to those in the aforementioned method embodiment and will not be repeated here.

[0220] It should be noted that it should be understood that the division of the various modules of the above device is only a division of logical functions. In actual implementation, they can be fully or partially integrated into one physical entity, or they can be physically separated. And these modules can all be implemented in the form of software called by processing elements, or all in the form of hardware, or some modules can be implemented in the form of software called by processing elements, and some modules can be implemented in the form of hardware. For example, the power replenishment control module 302 can be a separately established processing element, or it can be integrated in a chip of the above device. In addition, it can also be stored in the memory of the above device in the form of program code, and called and executed by a processing element of the above device. The implementation of other modules is similar. In addition, these modules can be fully or partially integrated together, or they can be implemented independently. The processing element here can be an integrated circuit with signal processing capabilities. In the implementation process, each step of the above method or each module above can be completed by an integrated logic circuit of hardware in the processor element or instructions in software form.

[0221] Figure 4 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application, see Figure 4 The electronic device 400 includes a processor 401 and a memory 402 communicatively connected to the processor 401;

[0222] Memory 402 stores computer executable instructions;

[0223] The processor 401 executes the computer execution instructions stored in the memory 402 to implement the technical solution of the aforementioned low-voltage battery intelligent charging method.

[0224] In the above-mentioned electronic device 400, the memory 402 and the processor 401 are electrically connected directly or indirectly to realize data transmission or interaction. For example, these elements can be electrically connected to each other through one or more communication buses or signal lines, such as through a bus. 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. The bus can be divided into an address bus, a data bus, a control bus, etc., but it does not mean that there is only one bus or one type of bus. The memory 402 stores computer execution instructions for implementing the above-mentioned low-voltage battery intelligent charging method, including at least one software function module that can be stored in the memory 402 in the form of software or firmware. The processor 401 executes various functional applications and data processing by running the software programs and modules stored in the memory 402.

[0225] The memory 402 includes at least one type of readable storage medium, including but not limited to random access memory (RAM), read only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), and electrically erasable read-only memory (EEPROM). The memory 402 is used to store programs, and the processor 401 executes the programs after receiving the execution instruction. Furthermore, the software programs and modules in the above-mentioned memory 402 may also include an operating system, which may include various software components and / or drivers for managing system tasks (such as memory management, storage device control, power management, etc.), and may communicate with various hardware or software components to provide an operating environment for other software components.

[0226] The processor 401 may be an integrated circuit chip having the ability to process signals. The above-mentioned processor 401 may be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), a digital signal processor (DSP), an application-specific integrated circuit (ASIC), etc. The disclosed methods, steps and logic block diagrams in the embodiments of the present application may be implemented or executed. The general-purpose processor may be a microprocessor, or the processor 401 may be any conventional processor, etc.

[0227] The electronic device 400 is used to execute the technical solution provided by the aforementioned low-voltage battery intelligent charging method embodiment. Its implementation principle and technical effect are similar to those in the aforementioned method embodiment and will not be repeated here.

[0228] An embodiment of the present application also provides a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed, they are used to implement the technical solution of the aforementioned low-voltage battery intelligent charging method.

[0229] The computer-readable storage medium mentioned above can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk. The computer-readable storage medium can be any available medium that can be accessed by a general or special-purpose computer.

[0230] An exemplary readable storage medium is coupled to a processor so that the processor can read information from the readable storage medium and write information to the readable storage medium. Of course, the readable storage medium can also be a component of the processor. The processor and the readable storage medium can be located in an application specific integrated circuit (Application Specific Integrated Circuits, abbreviated as: ASIC). Of course, the processor and the readable storage medium can also exist as discrete components in the control device of the low-voltage battery intelligent charging device.

[0231] An embodiment of the present application also provides a computer program product, including a computer program, which, when executed, is used to implement the technical solution of the aforementioned low-voltage battery intelligent charging method.

[0232] In the above embodiments, those skilled in the art will appreciate that the implementation of the above method embodiments can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function according to the embodiment of the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website site, a computer, a server or a data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless network, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server or a data center that includes one or more available media integrated. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (eg, a solid state disk (SSD)).

[0233] In the above embodiments, the description of each embodiment has its own emphasis. For the part not described in detail in a certain embodiment, please refer to the relevant description of other embodiments. The technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0234] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the invention disclosed herein. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present application are indicated by the appended claims.

[0235] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A low-voltage battery intelligent charging method, characterized in that: Applied to the in-vehicle terminal TBOX, including: When the vehicle is in the sleep state, monitor the voltage of the low-voltage battery on the vehicle to collect the real-time voltage of the low-voltage battery; If the real-time voltage is less than the first dynamic threshold, charge the low-voltage battery; wherein, the first dynamic threshold is determined based on the initial voltage of the low-voltage battery when the vehicle enters the sleep state.

2. The method according to claim 1, characterized in that The method further includes: Periodically trigger a preset timer, and determine whether the low-voltage battery has been charged within the timing range of the timer; If the low-voltage battery has not been charged within the timing range of the timer, charge the low-voltage battery.

3. The method according to any one of claims 1 to 2, characterized in that: Before charging the low-voltage battery, the method further includes: Based on the initial voltage, determine a second dynamic threshold; wherein, the second dynamic threshold is less than the first dynamic threshold; If the real-time voltage is not greater than the second dynamic threshold, determine that the charging duration of the low-voltage battery is the first duration; If the real-time voltage is greater than the second dynamic threshold and not greater than the first dynamic threshold, determine that the charging duration is the second duration; If the real-time voltage is greater than the first dynamic threshold, determine that the charging duration is the third duration; wherein, the third duration, the second duration, and the first duration increase in sequence.

4. The method according to claim 3, characterized in that The first dynamic threshold satisfies the following formula: Vth1 = a·Vc Wherein, Vth1 represents the first dynamic threshold, Vc represents the initial voltage, a represents a coefficient, and 0 < a < 1; The second dynamic threshold satisfies the following formula: Vth2 = b·Vc Wherein, Vth2 represents the second dynamic threshold, b represents a coefficient, 0 < b < 1 and a > b.

5. The method according to any one of claims 1-2, characterized in that: The method further includes: After the continuous charging time of the low-voltage battery reaches the preset shortest charging duration, monitor whether the vehicle meets the preset exit charging conditions; If the vehicle meets any one of the exit conditions in the exit charging conditions, stop charging the low-voltage battery; Wherein, the exit charging conditions include: The vehicle is in the wake-up state; The vehicle triggers a maintenance signal or a charging signal; The VBAT voltage of the vehicle is greater than the preset threshold and remains for the preset duration, and the output current of the DC controller of the vehicle is less than the preset threshold; The SOC of the power battery on the vehicle is less than the preset safe charging value; The highest fault level of the DCDC converter, the battery management system BMS or the vehicle controller VCU on the vehicle is not less than the preset level; The vehicle continuously loses the feedback message of the DCDC converter within the preset time period; The continuous charging time of the low-voltage battery is greater than the preset longest charging duration.

6. The method according to claim 5, characterized in that The method further includes: Determine the exit conditions met by the vehicle, and generate an exception reminder message based on the exit conditions; Send the exception reminder message to the user terminal.

7. The method according to any one of claims 1-2, characterized in that: Before charging the low-voltage battery, the method further includes: Judge whether the vehicle meets the preset entry charging conditions; If the vehicle meets all the entry conditions in the entry charging conditions, charge the low-voltage battery. The conditions for entering the power replenishment phase include: The vehicle is in a dormant state; The vehicle does not trigger a maintenance signal or a charging signal; The SOC of the power battery on the vehicle is greater than a preset safe charging value; The maximum fault level of the vehicle's DCDC converter, power management system BMS and vehicle controller VCU is less than a preset level; The vehicle does not lose feedback messages from the DCDC converter, the power management system BMS and the vehicle controller VCU within a preset time period.

8. A low-voltage battery intelligent charging device, characterized in that: Applied to vehicle-mounted terminal TBOX, including: A voltage monitoring module, used to monitor the voltage of a low-voltage battery on the vehicle when the vehicle is in a dormant state, so as to collect the real-time voltage of the low-voltage battery; A charging control module is used to charge the low-voltage battery if the real-time voltage is less than a first dynamic threshold; wherein the first dynamic threshold is determined based on the initial voltage of the low-voltage battery when the vehicle enters a dormant state.

9. An electronic device, characterized in that: comprising a processor, and a memory communicatively connected to the processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory to implement the method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, which, when executed, are used to implement the method according to any one of claims 1 to 7.

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