Vehicle power supply control method, device, equipment and storage medium

Abstract

The present application discloses a vehicle power supply control method, device, equipment and storage medium, which relates to the field of battery power supply technology. The method of the present application includes: obtaining the sentinel mode, vehicle refrigerator mode, vehicle operating mode and vehicle upgrade status identified by the vehicle controller; determining the power supply mode of the DC converter according to at least one of the sentinel mode, vehicle refrigerator mode, vehicle operating mode and vehicle upgrade status; and controlling the DC converter according to the power supply mode so that the DC converter supplies power through the power battery. The present application directly connects the battery pack and the low-voltage network of the vehicle through a DC converter and performs power supply control, thereby solving the problem of powering the low-voltage components of the vehicle when the vehicle is not on high voltage and does not wake up the other high-voltage controllers, reducing power supply energy consumption, improving the power supply efficiency of the vehicle, and reducing power supply failures.

Description

Technical Field

[0001] The present application relates to the technical field of battery power supply, and in particular to a vehicle power supply control method, device, equipment and storage medium. Background Art

[0002] With the development of intelligent new energy vehicles, energy consumption in low-voltage states has become increasingly prominent. This is especially true when the vehicle is in sentry mode, operating the onboard refrigerator, or uploading static data. Static power consumption increases significantly, and traditional power supply solutions are clearly insufficient. A common solution relies on a low-voltage battery for power, switching to the high-voltage system to recharge the battery when the battery is low. However, this frequent switching significantly shortens the low-voltage battery's service life and, in severe cases, can even cause vehicle failure due to the inability to access high voltage. Furthermore, frequent charge and discharge cycles not only increase maintenance costs but also reduce the user experience. Another traditional solution is to keep the entire vehicle's high-voltage system awake, using the DC-DC converter integrated in the OBC on the high-voltage side to continuously recharge the battery. However, this solution poses safety risks, as waking up the entire vehicle's high-voltage system also requires waking up all controllers, leading to a sharp increase in energy consumption. Furthermore, prolonged high-voltage wakeup can lead to other potential problems, such as reduced system stability and accelerated component aging.

[0003] Therefore, how to power the low-voltage components of the vehicle without supplying high voltage to the vehicle and waking up other high-voltage controllers is a problem that needs to be solved urgently. Summary of the Invention

[0004] The main purpose of this application is to provide a vehicle power supply control method, device, equipment and storage medium, aiming to solve the technical problem of powering the low-voltage components of the vehicle without supplying high voltage to the vehicle and waking up the remaining high-voltage controllers.

[0005] To achieve the above objectives, the present application proposes a vehicle power supply control method, which is applied to a vehicle power supply control system, the system comprising: a vehicle controller and a power distribution box connected to each other, a battery pack disposed in the power distribution box, and a DC converter and a power battery disposed in the battery pack;

[0006] The method comprises:

[0007] Obtain the sentry mode, vehicle refrigerator mode, vehicle working mode and vehicle upgrade status recognized by the vehicle controller;

[0008] determining a power supply mode of the DC converter according to at least one of the sentinel mode, the vehicle refrigerator mode, the vehicle operating mode, and the vehicle upgrade status;

[0009] The DC converter is controlled according to the power supply mode so that the DC converter is powered by the power battery.

[0010] In one embodiment, the step of determining the power supply mode of the DC converter according to at least one of the sentinel mode, the vehicle refrigerator mode, the vehicle operating mode, and the vehicle upgrade status includes:

[0011] When the sentinel mode or the vehicle refrigerator mode is in the on-state, determining that the power supply mode of the DC converter is the first power supply mode;

[0012] When the vehicle operating mode is the upper high-voltage operating mode, determining the power supply mode of the DC converter to be the second power supply mode;

[0013] When the whole vehicle upgrade state is a pre-upgrade state, the power supply mode of the DC converter is determined to be a third power supply mode.

[0014] In one embodiment, the step of controlling the DC converter according to the power supply mode includes:

[0015] When the power supply mode is the first power supply mode, obtaining the device operating status, battery power, and predicted energy consumption;

[0016] The DC converter is controlled according to the operating state of the device, the battery power and the predicted energy consumption.

[0017] In one embodiment, the step of controlling the DC converter according to the device operating state, the battery power, and the predicted energy consumption includes:

[0018] When the device is in a normal operating state and the battery power is greater than a preset start-up battery power threshold, turning on the DC converter and calculating the output voltage according to the predicted energy consumption;

[0019] The DC converter is controlled to perform voltage conversion according to the output voltage.

[0020] In one embodiment, the step of controlling the DC converter according to the power supply mode includes:

[0021] When the power supply mode is the second power supply mode, obtaining a vehicle speed and a vehicle tilt angle, and detecting whether a stabilization control signal or a collision signal is received;

[0022] The DC converter is turned on when any of the following conditions is met: receiving the stabilization control signal or the collision signal, the vehicle speed within a preset unit time is greater than or equal to a preset vehicle speed threshold, and the vehicle tilt angle is greater than a preset vehicle tilt angle.

[0023] In one embodiment, the step of controlling the DC converter according to the power supply mode includes:

[0024] When the power supply mode is the third power supply mode, obtaining the upgrade software size and the upgrade software quantity;

[0025] Obtaining an upgrade duration based on the upgrade software size and the upgrade software quantity;

[0026] When the upgrade time is greater than or equal to a preset upgrade time threshold, the DC converter is turned on.

[0027] In one embodiment, after the step of determining the power supply mode of the DC converter according to at least one of the sentinel mode, the vehicle refrigerator mode, the vehicle operating mode, and the vehicle upgrade status, the step further includes:

[0028] Upon receiving a DC converter wake-up instruction, obtaining a preset waiting time and a limit voltage;

[0029] The DC converter is controlled to enter standby mode according to the preset waiting time and limit voltage.

[0030] In addition, to achieve the above objectives, the present application also proposes a vehicle power supply control device, the device comprising:

[0031] The data acquisition module is used to obtain the sentry mode, vehicle refrigerator mode, vehicle working mode and vehicle upgrade status recognized by the vehicle controller;

[0032] a power supply mode determination module, configured to determine a power supply mode of the DC converter according to at least one of the sentinel mode, the vehicle refrigerator mode, the vehicle operating mode, and the vehicle upgrade status;

[0033] A power supply control module is used to control the DC converter according to the power supply mode so that the DC converter is powered by the power battery.

[0034] In addition, to achieve the above-mentioned purpose, the present application also proposes a vehicle power supply control device, which includes: a memory, a processor, and a computer program stored on the memory and runnable on the processor, and the computer program is configured to implement the steps of the vehicle power supply control method as described above.

[0035] In addition, to achieve the above-mentioned purpose, the present application also proposes a storage medium, which is a computer-readable storage medium. A computer program is stored on the storage medium, and when the computer program is executed by the processor, the steps of the vehicle power supply control method described above are implemented.

[0036] In addition, to achieve the above-mentioned purpose, the present application also provides a computer program product, which includes a computer program, and when the computer program is executed by a processor, it implements the steps of the vehicle power supply control method as described above.

[0037] The present application provides a method for controlling power supply of a whole vehicle, and the method of the present application includes: obtaining the sentinel mode, the onboard refrigerator mode, the vehicle working mode and the whole vehicle upgrade status identified by the whole vehicle controller; determining the power supply mode of the DC converter according to at least one of the sentinel mode, the onboard refrigerator mode, the vehicle working mode and the whole vehicle upgrade status; controlling the DC converter according to the power supply mode so that the DC converter supplies power through the power battery. In summary, the present application directly connects the battery pack and the low-voltage network of the whole vehicle through the DC converter and performs power supply control, thereby solving the technical problem of realizing power supply to the low-voltage components of the whole vehicle when the vehicle does not supply high voltage and does not wake up the other high-voltage controllers, reducing power supply energy consumption, improving the power supply efficiency of the whole vehicle, and reducing power supply failures. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] 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.

[0039] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0040] Figure 1 This is a wiring diagram of a DC converter in a battery pack in an embodiment of a vehicle power supply control method of this application;

[0041] Figure 2 This is a wiring diagram of a DC converter in a low-voltage network in an embodiment of a vehicle power supply control method of this application;

[0042] Figure 3 A schematic diagram of a flow chart of the first embodiment of the vehicle power supply control method of the present application;

[0043] Figure 4 A flow chart illustrating a second embodiment of the vehicle power supply control method of the present application;

[0044] Figure 5 This is a schematic diagram of the module structure of the vehicle power supply control device according to an embodiment of the present application;

[0045] Figure 6This is a schematic diagram of the device structure of the hardware operating environment involved in the vehicle power supply control method in the embodiment of the present application.

[0046] The purpose, features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0047] It should be understood that the specific embodiments described herein are merely used to explain the technical solutions of the present application and are not intended to limit the present application.

[0048] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0049] The main solution of the embodiment of the present application is: obtaining the sentinel mode, car refrigerator mode, vehicle working mode and vehicle upgrade status identified by the vehicle controller; determining the power supply mode of the DC converter according to at least one of the sentinel mode, the car refrigerator mode, the vehicle working mode and the vehicle upgrade status; controlling the DC converter according to the power supply mode so that the DC converter is powered by the power battery.

[0050] With the development of intelligent new energy vehicles, energy consumption in low-voltage states has become increasingly prominent. This is especially true when the vehicle is in sentry mode, operating the onboard refrigerator, or uploading static data. Static power consumption increases significantly, and traditional power supply solutions are clearly insufficient. A common solution relies on a low-voltage battery for power, switching to the high-voltage system to recharge the battery when the battery is low. However, this frequent switching significantly shortens the low-voltage battery's service life and, in severe cases, can even cause vehicle failure due to the inability to access high voltage. Furthermore, frequent charge and discharge cycles not only increase maintenance costs but also reduce user experience. Another traditional solution is to keep the entire vehicle's high-voltage system awake, using the DC-DC converter integrated in the OBC on the high-voltage side to continuously recharge the battery. However, this solution poses safety risks, as waking up the entire vehicle's high-voltage system also requires waking up all controllers, leading to a sharp increase in energy consumption. Furthermore, prolonged high-voltage wakeup can lead to other potential problems, such as reduced system stability and accelerated component aging. Therefore, how to power all low-voltage components in a vehicle without waking up the high-voltage system and other high-voltage controllers is an urgent problem that needs to be solved.

[0051] This application directly connects the battery pack and the low-voltage network of the entire vehicle through a DC converter and controls the power supply, solving the technical problem of powering the low-voltage components of the entire vehicle without supplying high voltage to the vehicle and waking up the remaining high-voltage controllers. It reduces power supply energy consumption, improves the power supply efficiency of the entire vehicle, and reduces power supply failures.

[0052] It should be noted that the execution subject of this embodiment can be a vehicle power supply control system, or a computing service device with data processing, network communication, and program execution functions, such as a tablet computer, personal computer, mobile phone, etc., or an electronic device capable of implementing the above-mentioned vehicle power supply control functions, etc. This embodiment is not specifically limited to this. The following uses the vehicle power supply control system as an example to illustrate this embodiment and the following embodiments.

[0053] Reference Figure 1 and Figure 2 , Figure 1 This is a wiring diagram of the DC converter in the battery pack in one embodiment of the vehicle power supply control method of this application. Figure 2 This is a schematic diagram of the connection of the DC converter in the low-voltage network in one embodiment of the vehicle power supply control method of this application.

[0054] like Figure 1 As shown in the figure, HV+ and HV- refer to the positive and negative poles of the high-voltage circuit, respectively. Positive Relay is the positive relay, Negative Relay is the negative relay, and Precharge Relay is the precharge circuit. The high-voltage end of the DC-DC converter (DC-DC converter) is directly connected to the front end of the relay, and the DC-DC converter is equipped with a fuse and switch control device. The DC-DC converter's low-voltage output is divided into two paths. One path is directly connected to the BMS end in the battery pack, and an anti-reverse diode is installed at the BMS end. The other path of the DC-CDC low-voltage output is connected to the power distribution box through the battery pack's low-voltage connector. The power distribution box is equipped with a fuse and then connected to the vehicle's low-voltage power supply network and the battery. The DC-CDC is connected to the BMS's internal CAN network, and the BMS is connected to the vehicle's CAN network. The BMS controls the DC-CDC based on the model recognized by the vehicle controller, for example, whether to enable the sentry, whether to open the refrigerator, whether to upload static data, and whether to recharge the low-voltage battery.

[0055] It's important to note that the DC-DC converter is wired inside the pack between the relay and the current sensor, allowing it to operate at high voltage without powering down. The DC-DC converter's low-voltage output is split into two paths: one directly connected to the BMS for power and insulated at the DCDC output port; the other connected directly to the outside of the battery pack via the vehicle's low-voltage connector. The BMS has two power supply paths: one external (outside the battery pack) and one directly supplied by the DC-DC converter inside the battery pack. Both power supply paths are equipped with reverse-bias diodes, specifically in the positive circuit to limit current flow. The DC-DC converter's housing is also grounded.

[0056] like Figure 2As shown, it should be noted that the external output circuit of the DCDC (i.e. DC converter) in the battery pack is connected to the vehicle distribution box, which can supply power to the vehicle load and replenish the low-voltage battery; the BMS communication control line is connected to the vehicle controller to receive instructions from the vehicle controller; other loads of the vehicle, such as sentinels, on-board refrigerators, etc., all draw power from the vehicle distribution box and have network communication with the vehicle controller.

[0057] Based on this, the embodiment of the present application provides a vehicle power supply control method, referring to Figure 3 , Figure 3 This is a flow chart of the first embodiment of the vehicle power supply control method of the present application.

[0058] In this embodiment, the vehicle power supply control method includes steps S10 to S30:

[0059] Step S10: Acquire the sentry mode, vehicle refrigerator mode, vehicle operating mode and vehicle upgrade status recognized by the vehicle controller.

[0060] It should be noted that in this step, the vehicle controller will obtain the sentinel mode, vehicle refrigerator mode, the vehicle's current operating mode (such as upper high-voltage operating mode, lower high-voltage operating mode, etc.) and the vehicle's upgrade status (such as OTA pre-upgrade status, upgrading status, and complete upgrade status, etc.) in real time through the vehicle network (such as the CAN network). Sentinel mode and vehicle refrigerator mode are two specific power consumption modes when the vehicle is static. The vehicle operating mode reflects the vehicle's current voltage state, and the vehicle upgrade status indicates whether the vehicle is undergoing a software upgrade.

[0061] Additionally, it should be noted that Sentry Mode is a vehicle safety monitoring mode that continuously monitors the vehicle's surroundings while the vehicle is stationary. A car refrigerator is a device used to provide refrigeration or freezing functions within the vehicle. The vehicle operating mode covers the current operating voltage state of the vehicle, such as upper high voltage or lower high voltage. The vehicle upgrade status refers to whether the vehicle software (such as the ECU and BMS) is ready for remote upgrades.

[0062] Step S20: determining a power supply mode of the DC converter according to at least one of the sentinel mode, the vehicle refrigerator mode, the vehicle operating mode, and the vehicle upgrade status.

[0063] It should be noted that in this step, the vehicle controller will determine the power supply mode of DCDC through a preset strategy based on the information obtained about the sentry mode, vehicle refrigerator mode, vehicle working mode and vehicle upgrade status. The power supply mode of DCDC includes working mode, standby mode and OTA power supply mode, etc. In addition, it should be noted that DCDC is the abbreviation of DC converter, which can convert the high voltage electricity of the power battery into the low voltage electricity required by the vehicle's low voltage system. Standby mode refers to the low power consumption state of DCDC when it does not receive a working instruction. Working mode refers to the state in which DCDC outputs low voltage or high voltage according to the instructions of the vehicle controller. OTA power supply mode refers to the state of specific voltage and current output provided by DCDC in supporting the vehicle OTA upgrade process.

[0064] Step S30: controlling the DC converter according to the power supply mode so that the DC converter is powered by the power battery.

[0065] It should be noted that in this step, the vehicle controller will send control instructions to the DCDC through the CAN network based on the current DCDC power supply mode to control the start and stop of the DCDC, the output of voltage and current, etc. After receiving the control instructions, the DCDC obtains high-voltage electricity from the power battery and converts it according to the instructions, and then outputs low-voltage electricity to power the vehicle's low-voltage system or specific load components. For example, when the vehicle controller determines that the DCDC needs to be in working mode to support the Sentinel or the car refrigerator, it will send a start-up instruction and voltage output requirements to the DCDC. After receiving the instruction, the DCDC obtains high-voltage electricity from the power battery and converts it, and outputs the converted low-voltage electricity to the Sentinel or the car refrigerator. When the vehicle controller determines that the DCDC power supply is no longer needed, it will send a shutdown instruction to the DCDC to stop the low-voltage output and reduce energy consumption.

[0066] It's also important to note that the DC-DC control process is implemented through communication between the vehicle controller and the DC-DC. The vehicle controller determines the DC-DC power supply mode and output requirements based on the vehicle's actual needs and pre-set policies, and sends control commands to the DC-DC via the CAN network. The DC-DC then responds accordingly to meet the vehicle's power needs.

[0067] In a feasible implementation manner, the step S20 specifically includes:

[0068] Step S201: when the sentinel mode or the vehicle refrigerator mode is in the on state, determining that the power supply mode of the DC converter is the first power supply mode.

[0069] It should be noted that in this step, when the vehicle is stationary and Sentry Mode or Car Refrigerator Mode is activated, the vehicle controller will first obtain the status information of these two modes through the vehicle network. Subsequently, the vehicle controller will calculate based on the preset model to determine whether the DCDC in the battery pack needs to be turned on and determine its power supply mode to be the first power supply mode. The main function of this step is to ensure that during the operation of Sentry Mode or Car Refrigerator Mode, the DCDC in the battery pack can stably and efficiently provide the required power through the current circuit configuration, thereby meeting the energy consumption requirements of these modes while reducing the overall energy consumption of the vehicle.

[0070] Additionally, it should be noted that the first power supply mode refers to the power output mode provided by the DCDC under specific operating conditions (such as when a high-voltage load device such as a Sentinel or car refrigerator is turned on). In this mode, the DCDC's output parameters, such as voltage and current, are precisely controlled based on the actual needs of the Sentinel mode and the car refrigerator.

[0071] Step S202: When the vehicle operating mode is the upper high voltage operating mode, determining that the power supply mode of the DC converter is the second power supply mode.

[0072] It should be noted that in this step, when the vehicle enters the upper high-voltage working mode (i.e., the vehicle engine is started and the high-voltage system starts working), the vehicle controller will determine whether the current power supply mode is the second power supply mode based on the vehicle's real-time status information, such as vehicle speed, acceleration, etc., and the battery status information provided by the BMS. The main function of this step is to ensure that during the vehicle's upper high-voltage operation, the DCDC can continue to provide low-voltage power support according to the vehicle's real-time needs, while ensuring the safety and stability of the battery pack. In addition, it should be noted that the second power supply mode refers to the power output mode provided by the DCDC in the vehicle's upper high-voltage working mode. In this mode, parameters such as the output voltage and current of the DCDC are continuously controlled according to the real-time needs of the vehicle.

[0073] Step S203: When the vehicle upgrade state is the pre-upgrade state, determining that the power supply mode of the DC converter is the third power supply mode.

[0074] It should be noted that when the vehicle needs to undergo a vehicle-wide OTA upgrade, TBOX will determine that the power supply mode of DCDC is the third power supply mode. The main function of this step is to ensure that during the vehicle-wide OTA upgrade, DCDC can provide stable power support to ensure the smooth progress of the upgrade process. For example, when the vehicle needs to undergo a large-scale OTA upgrade, TBOX will evaluate the time and energy consumption required for the upgrade and send instructions to the vehicle controller. After receiving the instructions, the vehicle controller will set the vehicle status to the pre-upgrade status and send instructions to the BMS, requiring the BMS to start the DCDC in the battery pack and set its power supply mode to the third power supply mode. In this mode, DCDC will output an appropriate voltage value based on the upgrade requirement information provided by TBOX to support the OTA upgrade of the vehicle. At the same time, the BMS will continue to monitor the status of the battery pack and the working status of DCDC to ensure the safety and stability of the entire upgrade process.

[0075] In addition, it should be noted that the third power supply mode refers to the power output mode provided by the DCDC during the vehicle OTA upgrade state. In this mode, the DCDC output voltage and current and other parameters are continuously controlled according to the actual needs of the OTA upgrade. In addition, after the vehicle OTA upgrade is completed, the vehicle controller will issue a command to the BMS, requesting the BMS to shut down the DCDC and release the third power supply mode.

[0076] In a feasible implementation manner, after step S20, steps A10 to A20 are further included:

[0077] Step A10: upon receiving the DC converter wake-up instruction, obtaining a preset waiting time and a limit voltage.

[0078] It should be noted that in this step, when the system decides that the DCDC needs to be woken up to provide power, it will first obtain two key parameters: the preset waiting time and the limiting voltage. The preset waiting time refers to the time interval between receiving the wake-up command and the DCDC officially starting to work. In this embodiment, the preset waiting time is 3 minutes. It can be understood that the design of this waiting time is to ensure the stability of the vehicle system and avoid voltage fluctuations or system instability that may be caused by starting the DCDC immediately after receiving the command. The limiting voltage refers to the voltage value output by the DCDC in standby mode. In this embodiment, the limiting voltage is 0V. It can be understood that this design is to prevent unnecessary energy consumption or impact on the battery or other vehicle systems during the DCDC standby period. In addition, it should be noted that the preset waiting time can be calibrated according to factors such as specific usage scenarios to ensure optimal system performance and energy consumption performance.

[0079] Step A20: Control the DC converter to enter standby mode according to the preset waiting time and limited voltage.

[0080] It should be noted that in this step, after the system obtains the preset waiting time and limit voltage, it will send these parameters to the DCDC and control the DCDC to enter the standby state. In the standby state, the output voltage of the DCDC will be limited to the preset limit voltage (0V), and the DCDC will wait for the preset waiting time (3 minutes) to end. It can be understood that the design of this standby state is to ensure that the DCDC is in a low-power, low-voltage state before officially working.

[0081] It's also important to note that the DCDC's standby state isn't a completely shut-down state, but rather a low-power, low-voltage standby state. In this state, the DCDC can still receive commands from the system and adjust or switch operating states accordingly. This design ensures that the DCDC can quickly and accurately enter operation upon receiving operating commands, providing a stable power supply for the vehicle.

[0082] This embodiment provides a method for controlling power supply for a vehicle. The method includes: obtaining a sentinel mode, a vehicle refrigerator mode, a vehicle operating mode, and a vehicle upgrade status identified by a vehicle controller; determining a power supply mode of the DC converter based on at least one of the sentinel mode, the vehicle refrigerator mode, the vehicle operating mode, and the vehicle upgrade status; and controlling the DC converter based on the power supply mode so that the DC converter supplies power through the power battery. In summary, this embodiment directly connects the battery pack and the vehicle's low-voltage network through a DC converter and controls power supply, thereby solving the technical problem of powering the vehicle's low-voltage components without activating high voltage and waking up other high-voltage controllers. This reduces power supply energy consumption, improves vehicle power supply efficiency, and reduces power supply failures.

[0083] Based on the first embodiment of the present application, in the second embodiment of the present application, the same or similar contents as those in the above embodiment 1 can be referred to the above introduction and will not be described in detail later. Figure 4 , Figure 4 This is a flow chart of the second embodiment of the vehicle power supply control method of the present application, wherein step S30 specifically includes:

[0084] Step S301: When the power supply mode is the first power supply mode, the device operating status, battery power and predicted energy consumption are obtained.

[0085] It should be noted that in this step, when the vehicle is in the first power supply mode, the system will obtain the device status related to the start of the DC converter (DCDC) through the vehicle controller to determine whether these devices are in normal working condition or whether there is a fault state that cannot operate. At the same time, the system also needs to read the power of the power battery (SOC, State of Charge) and the energy consumption predicted based on the current load in real time. The predicted energy consumption is mainly calculated based on the current operating status and operating time of the equipment and the historical experimental data of the equipment in the operating state. For example, when the vehicle is in sentry mode, the system will obtain the operating status of the sentry system to determine whether it is in normal working condition, such as whether the camera is working properly, whether the sensor is fault-free, etc. At the same time, the system will also read the remaining power of the power battery and calculate the predicted energy consumption based on the operating power consumption and expected operating time of the sentry mode.

[0086] Step S302: controlling the DC converter according to the device operating state, the battery power, and the predicted energy consumption.

[0087] It should be noted that in this step, the system controls the DC-DC converter (DCDC) using a preset control strategy based on the device's operating status, battery charge, and predicted energy consumption. Specifically, when the device is in normal operation and the battery charge is sufficient (for example, SOC ≥ 15%), the system controls the DC-DC converter to start and convert the high-voltage power of the power battery into low-voltage power based on the predicted energy consumption, which is then supplied to devices such as the Sentinel system or the car refrigerator.

[0088] It's also important to note that the specific implementation of the control strategy may vary depending on factors such as vehicle type, device type, and battery characteristics. Furthermore, to optimize energy consumption and extend battery life, the system can dynamically adjust the control strategy based on actual needs. For example, in Sentry mode, when the vehicle is stationary, the Sentry system's operating power consumption can be appropriately reduced; when the vehicle's refrigerator is in use, the cooling power can be adjusted based on the temperature inside the refrigerator and the ambient temperature.

[0089] In a feasible implementation manner, step 302 specifically includes:

[0090] Step B10: When the device is in a normal operating state and the battery power is greater than a preset start-up battery power threshold, the DC converter is turned on and the output voltage is calculated according to the predicted energy consumption.

[0091] It should be noted that when the vehicle controller (VCU) detects that the devices related to the DC converter (DCDC) (such as sentry mode sensors, on-board refrigerator compressors, etc.) are in normal working condition, it is judged that the system equipment is operating normally at this time. At the same time, the vehicle controller reads the current power of the power battery (SOC) and compares it with the preset battery power threshold (such as SOC ≥ 15%). If the current power is greater than or equal to the threshold, the conditions for turning on DCDC are met. After the above conditions are met, the vehicle controller calculates the voltage value that the DCDC needs to output based on the predicted energy consumption of the current device. This voltage value is designed to meet the normal operation of the equipment while minimizing unnecessary energy consumption.

[0092] It's important to note that predicted energy consumption refers to the estimated energy consumption of a device over the next period of time, calculated using a preset model based on the device's operating mode and historical data. The preset battery threshold is designed to protect the power battery, preventing over-discharge caused by activating the DC-DC function when the battery is too low.

[0093] Step B20: controlling the DC converter to perform voltage conversion according to the output voltage.

[0094] It should be noted that when the vehicle controller sends a DCDC start-up command to the BMS via the CAN bus and specifies an output voltage value, the BMS controls the DCDC to perform voltage conversion according to this command. The DCDC converts the high-voltage DC power obtained from the power battery into low-voltage DC power and outputs it at the output voltage value specified by the vehicle controller, so that the DCDC can power the load equipment running at that time.

[0095] In a feasible implementation manner, the step 30 further includes steps S301' to S302':

[0096] Step S301 ′: when the power supply mode is the second power supply mode, obtaining the vehicle speed and the vehicle tilt angle, and detecting whether a stabilization control signal or a collision signal is received.

[0097] It should be noted that when the vehicle is in the second power supply mode, the system will first activate a series of sensors and data acquisition modules to obtain key vehicle parameters in real time. Specifically, the system will obtain current vehicle speed information through the vehicle speed sensor; calculate the vehicle's tilt angle through devices such as body posture sensors or acceleration sensors; at the same time, the system will also monitor the operating status of the vehicle stability control system (such as ESP) to detect whether it has received stability control signals, and detect whether a collision has occurred and received a collision signal through the collision sensor. It can be understood that the purpose of this step is to comprehensively collect vehicle status information and provide data support for subsequent judgments on whether the vehicle is in adverse working conditions.

[0098] Step S302 ′: turning on the DC converter when any of the following conditions is met: receiving the stabilization control signal or the collision signal, the vehicle speed within a preset unit time being greater than or equal to a preset vehicle speed threshold, and the vehicle tilt angle being greater than a preset vehicle tilt angle.

[0099] It should be noted that in this step, the DCDC activation command is immediately triggered when the system detects any of the following conditions: Receiving a stability control signal, indicating that the vehicle is currently in a state requiring additional energy support to maintain stability; The vehicle speed is continuously (for 30 seconds) greater than or equal to a preset speed threshold (e.g., 120 km / h) within a preset unit time (e.g., within 1 minute), indicating that the vehicle is in a high-speed driving state; The vehicle tilt angle is greater than a preset vehicle tilt angle (e.g., 1°), indicating that the vehicle may be on a bumpy or uneven road. It is understood that the purpose of this step is to ensure that the DCDC can be activated in a timely manner without waking up other high-voltage controllers when the vehicle faces adverse operating conditions or emergencies, thereby continuously supplying power to the vehicle's low-voltage circuit. Furthermore, it should be noted that if the vehicle speed is continuously (for 30 seconds) less than or equal to a preset exit speed threshold (e.g., 80 km / h) within a preset unit time (e.g., within 1 minute), indicating that the vehicle has exited the high-speed driving state, the system will deactivate the DCDC.

[0100] In a feasible implementation manner, the step 30 further includes steps S301″ to S303″:

[0101] Step S301": when the power supply mode is the third power supply mode, obtaining the size and quantity of the upgrade software.

[0102] It should be noted that in this step, when the vehicle enters the third power supply mode (i.e., the mode for OTA upgrade of the entire vehicle), the system will use TBOX (telematics box) as the core component of communication and control to obtain the size and quantity of the software to be upgraded. This step is completed through communication between TBOX and the server, and the server will provide detailed information about the required upgrade software, including the size of each software and the total number of software. The purpose of obtaining this information is to evaluate the time and energy consumption required for the entire OTA process, so as to decide whether it is necessary to start the DC converter (DCDC) to assist in power supply. The purpose of this step is to ensure that the vehicle has sufficient power support during the OTA process to avoid OTA failure or limitation of other vehicle functions due to insufficient power. In addition, it should be noted that the "upgrade software size" and "upgrade software quantity" here refer to the size and quantity of software files that need to be upgraded OTA, which directly determine the time required for OTA upgrade.

[0103] Step S302": Obtain the upgrade duration according to the upgrade software size and the upgrade software quantity.

[0104] It should be noted that in this step, the system will calculate the estimated time required for the entire OTA upgrade process, that is, the upgrade duration, based on the size and quantity of the upgrade software obtained in the previous step, as well as the current status of the vehicle (such as network speed). It is understandable that this step is completed through a preset built-in strategy, which takes into account multiple factors, such as the size of the upgrade package, network transmission speed, etc., to derive a relatively accurate prediction of the upgrade duration. In addition, it should be noted that the upgrade duration refers to the total time required from the start of the OTA upgrade to the completion of all upgrade steps. It is a predicted value and will vary depending on various factors.

[0105] Step S303": when the upgrade time is greater than or equal to a preset upgrade time threshold, turning on the DC converter.

[0106] It should be noted that in this step, if the upgrade duration calculated by the system is greater than or equal to the preset upgrade duration threshold (the threshold can be set according to actual conditions, such as 10 minutes), the TBOX will send an instruction to the battery management module through the vehicle controller to turn on the DC converter (DCDC). The function of DCDC is to convert the high voltage electricity of the power battery into low voltage electricity for use by the vehicle's low voltage system. During the OTA upgrade process, turning on DCDC can provide additional power support to ensure that the vehicle has enough power to complete the entire OTA process. It is understandable that the role of this step is to improve the success rate of OTA upgrades and avoid upgrade failures due to insufficient power.

[0107] In this embodiment, the system obtains relevant parameters (device status, battery power, predicted energy consumption, vehicle speed, vehicle tilt angle, stability control signal, collision signal, upgrade software size and quantity, etc.) under different power supply modes (sentinel, car refrigerator and other high-voltage load conditions, harsh working conditions, whole vehicle OTA conditions) and controls the opening and closing of the DC converter (DCDC) according to preset conditions, thereby meeting the power supply requirements under different working conditions.

[0108] This application also provides a vehicle power supply control device, please refer to Figure 5 , the vehicle power supply control device includes:

[0109] The data acquisition module 10 is used to obtain the sentry mode, vehicle refrigerator mode, vehicle working mode and vehicle upgrade status recognized by the vehicle controller;

[0110] a power supply mode determination module 20, configured to determine a power supply mode of the DC converter according to at least one of the sentinel mode, the vehicle refrigerator mode, the vehicle operating mode, and the vehicle upgrade state;

[0111] The power supply control module 30 is configured to control the DC converter according to the power supply mode so that the DC converter is powered by the power battery.

[0112] The vehicle power supply control device provided in this application, which utilizes the vehicle power supply control method described in the aforementioned embodiment, can address the technical problem of providing power to the vehicle's low-voltage components without energizing the vehicle's high voltage controllers and waking up the remaining high-voltage controllers. Compared to the prior art, the beneficial effects of the vehicle power supply control device provided in this application are the same as those of the vehicle power supply control method described in the aforementioned embodiment. Other technical features of the vehicle power supply control device are the same as those disclosed in the aforementioned embodiment and are not further elaborated here.

[0113] The present application provides a vehicle power supply control device, which includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the vehicle power supply control method in the above-mentioned embodiment one.

[0114] Reference below Figure 6 , which shows a schematic diagram of the structure of a vehicle power supply control device suitable for implementing the embodiments of the present application. The vehicle power supply control device in the embodiments of the present application includes, but is not limited to, mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), and fixed terminals such as digital TVs and desktop computers. Figure 6 The vehicle power supply control device shown is merely an example and should not impose any limitations on the functions and scope of use of the embodiments of the present application.

[0115] like Figure 6As shown, the vehicle power supply control device may include a processing device 1001 (such as a central processing unit, a graphics processing unit, etc.), which can perform various appropriate actions and processes according to the program stored in the read-only memory (ROM) 1002 or the program loaded from the storage device 1003 to the random access memory (RAM) 1004. Various programs and data required for the operation of the vehicle power supply control device are also stored in the RAM 1004. The processing device 1001, ROM 1002 and RAM 1004 are connected to each other via a bus 1005. The input / output (I / O) interface 1006 is also connected to the bus. Generally, the following systems can be connected to the I / O interface 1006: an input device 1007 including, for example, a touch screen, a touchpad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; an output device 1008 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; a storage device 1003 including, for example, a magnetic tape, a hard disk, etc.; and a communication device 1009. The communication device 1009 can allow the vehicle power supply control device to communicate with other devices wirelessly or wired to exchange data. Although the figure shows a vehicle power supply control device with various systems, it should be understood that it is not required to implement or include all of the systems shown. More or fewer systems may be implemented or included instead.

[0116] In particular, according to the embodiments disclosed in the present application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, the embodiments disclosed in the present application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program comprising program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network via a communication device, or installed from a storage device 1003, or installed from a ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiment disclosed in the present application are executed.

[0117] The vehicle power supply control device provided in this application, which utilizes the vehicle power supply control method described in the aforementioned embodiment, can solve the technical problem of providing power to the vehicle's low-voltage components without energizing the vehicle's high voltage and waking up the remaining high-voltage controllers. Compared to the prior art, the beneficial effects of the vehicle power supply control device provided in this application are the same as those of the vehicle power supply control method described in the aforementioned embodiment. Other technical features of the vehicle power supply control device are the same as those disclosed in the aforementioned embodiment and are not further elaborated upon here.

[0118] It should be understood that the various parts disclosed in this application can be implemented using hardware, software, firmware, or a combination thereof. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0119] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

[0120] The present application provides a computer-readable storage medium having computer-readable program instructions (i.e., computer programs) stored thereon, and the computer-readable program instructions are used to execute the vehicle power supply control method in the above-mentioned embodiment.

[0121] The computer-readable storage medium provided in this application may be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, systems or devices, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In this embodiment, the computer-readable storage medium may be any tangible medium that contains or stores a program that can be used by or in conjunction with an instruction execution system, system or device. The program code contained on the computer-readable storage medium may be transmitted using any appropriate medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination thereof.

[0122] The above-mentioned computer-readable storage medium may be included in the vehicle power supply control device; or it may exist independently without being assembled into the vehicle power supply control device.

[0123] The above-mentioned computer-readable storage medium carries one or more programs. When the above-mentioned one or more programs are executed by the vehicle power supply control device, the vehicle power supply control device: obtains the sentinel mode, car refrigerator mode, vehicle working mode and vehicle upgrade status identified by the vehicle controller; determines the power supply mode of the DC converter according to at least one of the sentinel mode, the car refrigerator mode, the vehicle working mode and the vehicle upgrade status; controls the DC converter according to the power supply mode so that the DC converter is powered by the power battery.

[0124] Computer program code for performing the operations of the present application may be written in one or more programming languages, or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a stand-alone software package, partially on the user's computer and partially on a remote computer, or entirely on the remote computer or server. In cases involving a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., through the Internet using an Internet service provider).

[0125] The flow charts and block diagrams in the accompanying drawings illustrate the possible architecture, functions and operations of the systems, methods and computer program products according to various embodiments of the present application. In this regard, each box in the flow chart or block diagram can represent a module, program segment or a part of code, and the module, program segment or a part of code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order than that marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flow chart, and the combination of the boxes in the block diagram and / or flow chart can be implemented by a dedicated hardware-based system that performs the specified function or operation, or can be implemented by a combination of dedicated hardware and computer instructions.

[0126] The modules described in the embodiments of the present application may be implemented in software or hardware, wherein the name of a module does not necessarily limit the unit itself.

[0127] The readable storage medium provided in this application is a computer-readable storage medium, which stores computer-readable program instructions (i.e., a computer program) for executing the above-mentioned vehicle power supply control method. It can achieve the technical problem of powering the low-voltage components of the vehicle without the vehicle being on high voltage and without waking up the remaining high-voltage controllers. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided in this application are the same as the beneficial effects of the vehicle power supply control method provided in the above-mentioned embodiment, and will not be repeated here.

[0128] The present application also provides a computer program product, including a computer program, which implements the steps of the above-mentioned vehicle power supply control method when executed by a processor.

[0129] The computer program product provided in this application solves the technical problem of providing power to all low-voltage components in a vehicle without energizing the vehicle's high voltage and waking up other high-voltage controllers. Compared to the prior art, the beneficial effects of the computer program product provided in this application are the same as those of the vehicle power supply control method provided in the aforementioned embodiment, and are not further elaborated here.

[0130] The above description is only part of the embodiments of the present application and does not limit the patent scope of the present application. All equivalent structural transformations made by using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect application in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A vehicle power supply control method, characterized in that: The method is applied to a vehicle power supply control system, which includes: an interconnected vehicle controller, a power distribution box, and a battery pack, wherein the battery pack is provided with an interconnected DC converter and a power battery; the high-voltage end of the DC converter is directly connected to the front end of a relay of a high-voltage circuit, and a fuse and a switch control device are provided inside the DC converter; the low-voltage output end of the DC converter is divided into two paths, one of which is directly connected to the BMS end in the battery pack, and an anti-reverse diode is provided at the BMS end; the other path of the low-voltage output end of the DC converter is connected to the power distribution box through a low-voltage connector of the battery pack, and is connected to the low-voltage power supply network of the vehicle after being provided with a fuse by the power distribution box, and is connected to the battery; The method comprises: Obtain the sentry mode, vehicle refrigerator mode, vehicle working mode and vehicle upgrade status recognized by the vehicle controller; determining a power supply mode of the DC converter according to at least one of the sentinel mode, the vehicle refrigerator mode, the vehicle operating mode, and the vehicle upgrade status; Upon receiving a DC converter wake-up instruction, obtaining a preset waiting time and a limit voltage; Controlling the DC converter to enter standby mode according to the preset waiting time and the limiting voltage; The DC converter is controlled according to the power supply mode so that the DC converter is powered by the power battery.

2. The method according to claim 1, wherein The step of determining the power supply mode of the DC converter according to at least one of the sentinel mode, the vehicle refrigerator mode, the vehicle operating mode, and the vehicle upgrade state includes: When the sentinel mode or the vehicle refrigerator mode is in the on-state, determining that the power supply mode of the DC converter is the first power supply mode; When the vehicle operating mode is the upper high-voltage operating mode, determining the power supply mode of the DC converter to be the second power supply mode; When the whole vehicle upgrade state is a pre-upgrade state, the power supply mode of the DC converter is determined to be a third power supply mode.

3. The method according to claim 2, wherein The step of controlling the DC converter according to the power supply mode includes: When the power supply mode is the first power supply mode, obtaining the device operating status, battery power, and predicted energy consumption; The DC converter is controlled according to the operating state of the device, the battery power and the predicted energy consumption.

4. The method according to claim 3, wherein The step of controlling the DC converter according to the operating state of the device, the battery power and the predicted energy consumption includes: When the device is in a normal operating state and the battery power is greater than a preset start-up battery power threshold, turning on the DC converter and calculating the output voltage according to the predicted energy consumption; The DC converter is controlled to perform voltage conversion according to the output voltage.

5. The method according to claim 2, wherein The step of controlling the DC converter according to the power supply mode includes: When the power supply mode is the second power supply mode, obtaining a vehicle speed and a vehicle tilt angle, and detecting whether a stabilization control signal or a collision signal is received; The DC converter is turned on when any of the following conditions is met: receiving the stabilization control signal or the collision signal, the vehicle speed within a preset unit time is greater than or equal to a preset vehicle speed threshold, and the vehicle tilt angle is greater than a preset vehicle tilt angle.

6. The method according to claim 2, wherein The step of controlling the DC converter according to the power supply mode includes: When the power supply mode is the third power supply mode, obtaining the upgrade software size and the upgrade software quantity; Obtaining an upgrade duration based on the upgrade software size and the upgrade software quantity; When the upgrade time is greater than or equal to a preset upgrade time threshold, the DC converter is turned on.

7. A vehicle power supply control device, characterized in that: The vehicle power supply control device is applied to the vehicle power supply control method according to any one of claims 1 to 6, and the device includes: The data acquisition module is used to obtain the sentry mode, vehicle refrigerator mode, vehicle working mode and vehicle upgrade status recognized by the vehicle controller; a power supply mode determination module, configured to determine a power supply mode of a DC converter according to at least one of the sentinel mode, the vehicle refrigerator mode, the vehicle operating mode, and the vehicle upgrade status; The power supply control module is used to obtain a preset waiting time and a limit voltage when receiving a DC converter wake-up instruction; control the DC converter to standby according to the preset waiting time and the limit voltage; and control the DC converter according to the power supply mode so that the DC converter is powered by the power battery.

8. A vehicle power supply control device, characterized in that: The device includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program is configured to implement the steps of the vehicle power supply control method according to any one of claims 1 to 6.

9. A storage medium, characterized in that: The storage medium is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, the steps of the vehicle power supply control method according to any one of claims 1 to 6 are implemented.

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