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

Abstract

The invention discloses a whole vehicle power supply control method, device and equipment and a storage medium, and relates to the technical field of battery power supply, and the method comprises the steps that a sentry mode, a vehicle-mounted refrigerator mode, a vehicle working mode and a whole vehicle upgrading state recognized by a whole vehicle controller are obtained; determining a power supply mode of the direct current converter according to at least one of the sentry mode, the vehicle-mounted refrigerator mode, the vehicle working mode and the whole vehicle upgrading state; and controlling the direct-current converter according to the power supply mode, so that the direct-current converter supplies power through the power battery. The direct-current converter is directly connected with the battery pack and the low-voltage network of the whole vehicle and performs power supply control, so that the problem of realizing power supply of each low-voltage part of the whole vehicle in the state that the vehicle is not high-voltage and other high-voltage controllers are not awakened is solved, the power supply energy consumption is reduced, the power supply efficiency of the whole vehicle is improved, and power supply faults are reduced.

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] In the development of new energy vehicles, the energy consumption of vehicles in low voltage state has become increasingly prominent, especially when the vehicle is in sentinel mode, the on-board refrigerator is running, static data is uploaded, etc., the static power consumption increases significantly, and the traditional power supply solution has obvious shortcomings. A common traditional solution is to rely on low-voltage batteries for power supply, and switch to the high-voltage system to recharge the battery when the power is insufficient. However, this frequent switching and recharging method greatly shortens the service life of the low-voltage battery, and in severe cases may even cause the vehicle to malfunction due to the inability to access high voltage. In addition, frequent charge and discharge cycles not only increase maintenance costs, but also reduce user experience. Another traditional solution is to keep the vehicle's high-voltage system in an awake state at all times, and use the DCDC converter integrated in the OBC on the outside of the high voltage to continuously recharge the battery. However, this solution has safety risks, because the high-voltage awakening of the whole vehicle means that all controllers are also awakened, resulting in a sharp increase in energy consumption. In addition, long-term high-voltage awakening may also cause other potential problems, such as reduced system stability and accelerated component aging.

[0003] Therefore, how to supply power to 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 the present 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-mentioned purpose, the present application proposes a vehicle power supply control method, which is applied to a vehicle power supply control system, wherein the system comprises: a vehicle controller and a power distribution box connected to each other, a battery pack provided in the power distribution box, and a DC converter and a power battery connected to each other 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 state;

[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 working mode, and the vehicle upgrade state 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 the vehicle speed and the vehicle tilt angle, and detecting whether a stability control signal or a collision signal is received;

[0022] The DC converter is turned on when any of the following conditions is met: the stability control signal or the collision signal is received, the vehicle speed within a preset unit time is greater than or equal to a preset vehicle speed threshold, and the vehicle inclination angle is greater than a preset vehicle inclination 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 the upgrade duration according to 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 working mode, and the vehicle upgrade state, 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 limiting voltage.

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

[0031] The data acquisition module is used to obtain the sentinel 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 operation mode, and the vehicle upgrade state;

[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 whole vehicle power supply control device, which includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, and the computer program is configured to implement the steps of the whole 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, and a computer program is stored on the storage medium. 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 on-board 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 on-board 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 a DC converter and performs power supply control, which solves the technical problem of realizing power supply to various 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, reduces power supply energy consumption, improves the power supply efficiency of the whole vehicle, and reduces 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 drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[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 the present 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 the present 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 schematic diagram of a flow chart provided for the 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 described 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 only used to explain the technical solutions of the present application and are not used 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, the car refrigerator mode, the vehicle working mode and the vehicle upgrade status recognized 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] In the development of new energy vehicles, the energy consumption of vehicles in low voltage state has become increasingly prominent, especially when the vehicle is in sentinel mode, the on-board refrigerator is running, static data is uploaded, etc., the static power consumption increases significantly, and the traditional power supply solution has obvious shortcomings. A common traditional solution is to rely on low-voltage batteries for power supply, and switch to the high-voltage system to recharge the battery when the power is insufficient. However, this frequent switching and recharging method greatly shortens the service life of the low-voltage battery, and in severe cases may even cause the vehicle to malfunction due to the inability to access high voltage. In addition, frequent charge and discharge cycles not only increase maintenance costs, but also reduce user experience. Another traditional solution is to keep the high-voltage system of the whole vehicle in an awake state at all times, and use the DCDC converter integrated in the OBC on the outside of the high voltage to continuously recharge the battery. However, this solution has safety hazards, because the high-voltage wake-up of the whole vehicle means that all controllers are also awakened, resulting in a sharp increase in energy consumption. In addition, long-term high-voltage wake-up may also cause other potential problems, such as reduced system stability and accelerated component aging. Therefore, how to realize the power supply of various low-voltage components of the whole vehicle without the vehicle being on high voltage and waking up the remaining high-voltage controllers is a problem that needs to be solved urgently.

[0051] The present application directly connects the battery pack and the low-voltage network of the whole vehicle through a DC converter and performs power supply control, thereby solving the technical problem of powering the low-voltage components of the whole vehicle without supplying high voltage to the vehicle and waking up the remaining high-voltage controllers, reducing power supply energy consumption, improving the power supply efficiency of the whole vehicle, and reducing 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 running functions, such as a tablet computer, a personal computer, a mobile phone, etc., or an electronic device that can realize the above-mentioned vehicle power supply control function, etc., and this embodiment does not specifically limit this. The following takes 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 a DC converter in a battery pack in an embodiment of a vehicle power supply control method of the present application. Figure 2 This is a schematic diagram of the connection of a DC converter in a low-voltage network in an embodiment of a vehicle power supply control method of the present application.

[0054] like Figure 1 As shown, HV+ and HV- refer to the positive and negative poles of the high-voltage circuit respectively, Positive Relay is a positive relay, Negative Relay is a negative relay, and Precharge Relay is a precharge circuit; the high-voltage end of DCDC (i.e., DC converter) is directly connected to the front end of the relay, and a fuse and a switch control device are set inside the DCDC; the low-voltage output end of DCDC 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 set at the BMS end; the other path of the low-voltage output end of DCDC is connected to the distribution box through the low-voltage connector of the battery pack, and the distribution box is connected to the low-voltage power supply network of the whole vehicle after the fuse is set, and is connected to the battery; the DCDC is connected to the CAN inside the BMS, and the BMS is connected to the CAN network of the whole vehicle. The BMS controls the DCDC according to the model recognized by the whole vehicle controller, such as whether to turn on the sentinel, whether to turn on the refrigerator, whether to upload static data, whether to recharge the low-voltage battery, etc.

[0055] It should be noted that the DCDC is wired between the relay and the current sensor in the pack, so it can work at any time without powering off when the DCDC is at high voltage; the DCDC low-voltage output is divided into two paths, one of which is directly connected to the BMS for power supply, and a fuse is set at the DCDC output port; the other is directly connected to the outside of the battery pack through the low-voltage connector of the whole vehicle; the BMS has two power supply paths, one is external (outside the battery pack) output, and the other is directly supplied by the DCDC in the battery pack. The circuits of the two power supply paths are equipped with anti-reverse diodes, that is, anti-reverse diodes are set in the positive circuit to limit the current direction. In addition, it should be noted that the shell of the DCDC is 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 sentinel mode, vehicle refrigerator mode, vehicle operation 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 working mode (such as upper high-voltage working mode, lower high-voltage working 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 CAN network). Sentinel mode and vehicle refrigerator mode are two specific power consumption modes when the vehicle is static. The vehicle working mode reflects the current voltage state of the vehicle, and the vehicle upgrade status indicates whether the vehicle is undergoing a software upgrade.

[0061] In addition, it should be noted that the sentry mode is a vehicle safety monitoring mode that can continuously monitor the vehicle's surroundings when the vehicle is stationary; the vehicle refrigerator is a device used to provide refrigeration or freezing functions inside the vehicle. The vehicle operating mode covers the current operating voltage status of the vehicle, such as upper high voltage state, lower high voltage state, etc. The vehicle upgrade status refers to whether the vehicle software (such as ECU, BMS and other software) is ready for remote upgrade.

[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 state.

[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 sentinel mode, the vehicle refrigerator mode, the vehicle working mode and the vehicle upgrade status. The power supply modes of DCDC include 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 low voltage system of the vehicle. Standby mode refers to the low power consumption state of DCDC when no working instructions are received. The working mode refers to the state in which DCDC outputs low voltage or high voltage according to the instructions of the vehicle controller. The 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 DCDC through the CAN network according to the current DCDC power supply mode to control the start and shut down of DCDC, the output of voltage and current, etc. After receiving the control instruction, DCDC obtains high voltage electricity from the power battery and converts it according to the instruction requirements, 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 DCDC needs to be in working mode to support the sentinel or car refrigerator, it will send a start instruction and voltage output requirement to DCDC. After receiving the instruction, DCDC obtains high voltage electricity from the power battery for conversion, and outputs the converted low voltage electricity to the sentinel or car refrigerator. When the vehicle controller determines that DCDC power supply is no longer needed, it will send a shutdown instruction to DCDC to stop low-voltage output and reduce energy consumption.

[0066] In addition, it should be noted that the control process of DCDC is realized through the communication between the vehicle controller and DCDC. The vehicle controller determines the power supply mode and output requirements of DCDC according to the actual needs of the vehicle and the preset strategy, and sends the control instructions to DCDC through the CAN network. DCDC performs corresponding operations according to the received instructions to meet the power needs of the vehicle.

[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 in static mode and the sentinel mode or the 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 according to the preset model to determine whether it is necessary to turn on the DCDC in the battery pack 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 the sentinel mode or the car refrigerator mode, the DCDC in the battery pack can stably and efficiently provide the required power through the current circuit settings, thereby meeting the energy consumption requirements of these modes and reducing the overall energy consumption of the vehicle.

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

[0071] Step S202: when the vehicle operation mode is the upper high voltage operation 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 real-time needs of the vehicle, 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 whole vehicle upgrade state is a pre-upgrade state, determining that the power supply mode of the DC converter is a third power supply mode.

[0074] It should be noted that when the vehicle needs to perform a vehicle 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 OTA upgrade, DCDC can provide stable power support to ensure the smooth progress of the upgrade process. For example, when the vehicle needs to perform a large-scale OTA upgrade, TBOX will evaluate the time and energy consumption required for the upgrade and issue instructions to the vehicle controller. After receiving the instruction, the vehicle controller will set the vehicle status to the pre-upgrade status, and issue an instruction 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 DCDC in the vehicle OTA upgrade state. In this mode, the output voltage and current and other parameters of DCDC 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, requiring the BMS to turn off 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 the preset waiting time and limit voltage.

[0078] It should be noted that in this step, when the system decides that it needs to wake up the DCDC to provide power, two key parameters will be obtained first: 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 is understandable that the design of the 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 the standby state. In this embodiment, the limiting voltage is 0V. It is understandable 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 DCDC and control DCDC to enter the standby state. In the standby state, the output voltage of DCDC will be limited to the preset limit voltage (0V), and DCDC will wait for the preset waiting time (3 minutes) to end. It can be understood that the design of the standby state is to ensure that DCDC is in a low-power, low-voltage state before formal operation.

[0081] In addition, it should be noted that the standby state of DCDC is not a completely shut down state, but a low power consumption, low voltage standby state. In this state, DCDC can still receive instructions from the system and make corresponding adjustments or switch working states according to the instructions. Such a design can ensure that DCDC can quickly and accurately enter the working state after receiving the working instructions, and provide a stable power supply for the vehicle.

[0082] This embodiment provides a method for controlling power supply of a whole vehicle, and the method of this embodiment includes: obtaining the sentinel mode, the on-board refrigerator mode, the vehicle working mode and the whole vehicle upgrade status recognized by the whole vehicle controller; determining the power supply mode of the DC converter according to at least one of the sentinel mode, the on-board 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, this embodiment directly connects the battery pack and the low-voltage network of the whole vehicle through the DC converter and performs power supply control, which solves the technical problem of realizing power supply of various 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, reduces power supply energy consumption, improves the power supply efficiency of the whole vehicle, 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-mentioned embodiment 1 can refer to the above introduction, and will not be repeated 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, obtaining the device operating status, battery power and predicted energy consumption.

[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 opening of the DC converter (DCDC) through the vehicle controller to determine whether these devices are in normal working state 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 sentinel mode, the system will obtain the operating status of the sentinel system to determine whether it is in normal working state, 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 sentinel 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 will control the DC converter (DCDC) through a preset control strategy based on the acquired device operating status, battery power, and predicted energy consumption. Specifically, when the device is in normal operation and the battery power is sufficient (for example, SOC ≥ 15%), the system will control the DC converter to start and convert the high-voltage power of the power battery into low-voltage power according to the predicted energy consumption, and supply it to the Sentinel system or car refrigerator and other devices.

[0088] In addition, it should be noted that the specific implementation of the control strategy may vary depending on factors such as vehicle type, device type, battery characteristics, etc. In addition, in order to optimize energy consumption and extend battery life, the system can also dynamically adjust the control strategy according to actual needs. For example, in sentinel mode, when the vehicle is stationary, the operating power consumption of the sentinel system can be appropriately reduced; when the car refrigerator is in use, the cooling power can be adjusted according to the temperature inside the refrigerator and the ambient temperature.

[0089] In a feasible implementation manner, the 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 control unit (VCU) detects that the devices related to the direct current converter (DCDC) (such as sentinel mode sensors, vehicle refrigerator compressors, etc.) are in normal working condition, it is judged that the equipment operation status of the system is normal 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 equipment. This voltage value is designed to meet the normal operation of the equipment while minimizing unnecessary energy consumption.

[0092] In addition, it should be noted that the predicted energy consumption refers to the power that the device may consume in the future, calculated by a preset model based on the device's operating mode and historical data. The preset battery power threshold is to protect the power battery and avoid over-discharging the battery by turning on DCDC when the power 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 command to turn on DCDC to the BMS through the CAN bus and specifies the output voltage value, the BMS will control the DCDC to perform voltage conversion according to the command. The DCDC converts the high-voltage DC power obtained from the power battery into low-voltage DC power and outputs it according to the output voltage value specified by the vehicle controller, so that the DCDC can power the load equipment running at this 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 stability 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 start a series of sensors and data acquisition modules to obtain the key parameters of the vehicle in real time. Specifically, the system will obtain the 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 working status of the vehicle stability control system (such as ESP) to detect whether the stability control signal is received, and detect whether a collision occurs and receives a collision signal through the collision sensor. It can be understood that the role of this step is to comprehensively collect vehicle status information and provide data support for subsequent judgments on whether the vehicle is in a severe working condition.

[0098] Step S302': when any of the following conditions is met: receiving the stability 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 inclination angle is greater than a preset vehicle inclination angle, the DC converter is turned on.

[0099] It should be noted that in this step, when the system detects that any of the following conditions are met, the DCDC start command will be triggered immediately: receiving a stability control signal, indicating that the vehicle is currently in a state that requires additional energy support to maintain stability; within a preset unit time (such as within 1 minute), the vehicle speed continues (30s) to be greater than or equal to the preset vehicle speed threshold (such as 120km / h), indicating that the vehicle is in a high-speed driving state; the vehicle tilt angle is greater than the preset vehicle tilt angle (such as 1°), indicating that the vehicle may be on a bumpy or uneven road condition. It can be understood that the role of this step is to ensure that when the vehicle faces severe working conditions or emergencies, DCDC can be turned on in time without waking up other high-voltage controllers to continuously supply power to the vehicle's low-voltage circuit. In addition, it should be noted that if within a preset unit time (such as within 1 minute), the vehicle speed continues (30s) to be less than or equal to the preset exit speed threshold (such as 80km / h), indicating that the vehicle has exited the high-speed driving state, the system will turn off 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 upgrade software size and the upgrade software quantity.

[0102] It should be noted that in this step, when the vehicle enters the third power supply mode (i.e., the mode of OTA upgrade of the whole vehicle), the system will obtain the size and quantity of the software to be upgraded through TBOX (telematics processing box) as the core component of communication and control. 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 determine 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 other vehicle functions being limited 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 number 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 a variety of factors, such as the size of the upgrade package, network transmission speed, etc., to obtain 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 a variety of 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, requesting the DC converter (DCDC) to be turned on. 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 can be understood 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 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 comprises:

[0109] The data acquisition module 10 is used to obtain the sentinel 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 operation mode, and the vehicle upgrade state;

[0111] The power supply control module 30 is used 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 by the present application adopts the vehicle power supply control method in the above embodiment, which can solve the technical problem of realizing power supply to various low-voltage components of the vehicle when the vehicle is not on high voltage and the remaining high-voltage controllers are not awakened. Compared with the prior art, the beneficial effects of the vehicle power supply control device provided by the present application are the same as the beneficial effects of the vehicle power supply control method provided by the above embodiment, and the other technical features in the vehicle power supply control device are the same as the features disclosed in the above embodiment method, which will not be repeated here.

[0113] The present application provides a whole vehicle power supply control device, the whole vehicle power supply control device includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable 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 whole 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 embodiment of the present application. The vehicle power supply control device in the embodiment 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), etc., and fixed terminals such as digital TVs, desktop computers, etc. Figure 6 The vehicle power supply control device shown is merely an example and should not bring any limitation to 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 processor, etc.), which can perform various appropriate actions and processes according to the program stored in the read-only memory (ROM: Read Only Memory) 1002 or the program loaded from the storage device 1003 to the random access memory (RAM: Random Access Memory) 1004. In RAM1004, various programs and data required for the operation of the vehicle power supply control device are also stored. The processing device 1001, ROM1002 and RAM1004 are connected to each other through 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: Liquid Crystal Display), 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 by wire 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 have all the systems shown. More or fewer systems can be implemented or provided instead.

[0116] In particular, according to the embodiments disclosed in the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments disclosed in the present application include a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a 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 through 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 by the present application adopts the vehicle power supply control method in the above embodiment, which can solve the technical problem of realizing the power supply of various low-voltage components of the vehicle when the vehicle is not on high voltage and the remaining high-voltage controllers are not awakened. Compared with the prior art, the beneficial effects of the vehicle power supply control device provided by the present application are the same as the beneficial effects of the vehicle power supply control method provided by the above embodiment, and the other technical features in the vehicle power supply control device are the same as the features disclosed in the method of the previous embodiment, which will not be repeated here.

[0118] It should be understood that the various parts disclosed in this application can be implemented by 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 is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0120] The present application provides a computer-readable storage medium having computer-readable program instructions (ie, 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 the present 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 of the above. 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 of the above. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in combination 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 of the above.

[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, the car refrigerator mode, the vehicle working mode and the 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 separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of 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., via the Internet using an Internet service provider).

[0125] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present application. In this regard, each square box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the 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 square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two square 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 square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0126] The modules involved in the embodiments described in this application may be implemented by software or hardware, wherein the name of the module does not constitute a limitation on the unit itself in some cases.

[0127] The readable storage medium provided by the present application is a computer-readable storage medium, which stores computer-readable program instructions (i.e., computer programs) for executing the above-mentioned vehicle power supply control method, and can realize the technical problem of power supply to various low-voltage components of the vehicle without the vehicle being on high voltage and waking up the remaining high-voltage controllers. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided by the present application are the same as the beneficial effects of the vehicle power supply control method provided by 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 by the present application can solve the technical problem of realizing power supply to various low-voltage components of the whole vehicle when the vehicle does not supply high voltage and does not wake up other high-voltage controllers. Compared with the prior art, the beneficial effects of the computer program product provided by the present application are the same as the beneficial effects of the whole vehicle power supply control method provided by the above embodiment, and will not be elaborated here.

[0130] The above descriptions are only some embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect applications 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, the system comprising: a vehicle controller and a power distribution box connected to each other, a battery pack arranged in the power distribution box, and a DC converter and a power battery connected to each other in the battery pack; 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 state; 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, characterized in that 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 working mode and the vehicle upgrade state comprises: 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 1, characterized in that The step of controlling the DC converter according to the power supply mode comprises: 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, characterized in that The step of controlling the DC converter according to the device operating state, 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 1, characterized in that The step of controlling the DC converter according to the power supply mode comprises: When the power supply mode is the second power supply mode, obtaining the vehicle speed and the vehicle tilt angle, and detecting whether a stability control signal or a collision signal is received; The DC converter is turned on when any of the following conditions is met: the stability control signal or the collision signal is received, the vehicle speed within a preset unit time is greater than or equal to a preset vehicle speed threshold, and the vehicle inclination angle is greater than a preset vehicle inclination angle.

6. The method according to claim 1, characterized in that The step of controlling the DC converter according to the power supply mode comprises: When the power supply mode is the third power supply mode, obtaining the upgrade software size and the upgrade software quantity; Obtaining the upgrade duration according to 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. The method according to any one of claims 1 to 6, characterized in that 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 working mode and the vehicle upgrade state, the step further includes: Upon receiving a DC converter wake-up instruction, obtaining a preset waiting time and a limit voltage; The DC converter is controlled to enter standby mode according to the preset waiting time and limit voltage.

8. A vehicle power supply control device, characterized in that: The device comprises: The data acquisition module is used to obtain the sentinel 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 the DC converter according to at least one of the sentinel mode, the vehicle refrigerator mode, the vehicle operation mode, and the vehicle upgrade state; 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.

9. A vehicle power supply control device, characterized in that: The device comprises: 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 as claimed in any one of claims 1 to 7.

10. 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 as described in any one of claims 1 to 7 are implemented.

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