Safety protection method and device for vehicle power supply system, vehicle and electronic equipment

Abstract

The invention relates to a safety protection method and device for a vehicle power supply system, a vehicle and electronic equipment, and relates to the technical field of vehicles. The method comprises the steps that under the condition that the output power of a bus is smaller than the load demand power, configuration information of an electricity load is obtained, and the configuration information shows the power consumption reduction amount and the user perception degree when the electricity load is reduced to a second power level from a first power level; the first power level and the second power level are any two of a plurality of power levels corresponding to the electricity load; calculating the vacancy power of the bus; adjusting the electricity load based on the vacant power, the power consumption reduction amount and the user perceptibility; wherein the adjusted output power is larger than or equal to the load demand power, the electricity load can be effectively adjusted, safe operation of a vehicle power supply system is guaranteed, and the user experience is improved.

Description

Technical Field

[0001] This application relates to the technical field of vehicles, and particularly to a safety protection method, device, vehicle and electronic device for a vehicle power supply system. Background Art

[0002] In the field of new energy vehicles, a direct current to direct current (DC-DC) converter can convert the high-voltage direct current output by a power battery into a low-voltage direct current that can be directly used by low-voltage loads, providing stable power support for various low-voltage loads in the vehicle, thereby ensuring the normal operation of each system of the vehicle.

[0003] However, under the actual operating conditions of the vehicle, it is difficult to accurately predict the operating conditions of low-voltage loads, and it may occur that the total demand power of the loads is greater than the output power of the DC-DC converter. When this situation occurs, the voltage at the output end of the DC-DC converter and the operating voltage of the low-voltage loads will fluctuate. If effective protection measures are not taken in time, it may affect the normal operation of the low-voltage loads, and further affect the stability and reliability of the entire vehicle power supply system.

[0004] Currently, traditional protection measures usually adopt a simple switch control logic, that is, turn off fixed low-voltage loads to ensure the normal operation of the DC-DC converter. However, this fixed low-voltage load shutdown strategy does not fully consider the actual usage needs and user experience of users. After turning off some low-voltage loads, it may have a greater impact on the normal use of vehicle functions by users, causing inconvenience to users during actual use and reducing the overall satisfaction of users with the vehicle. Summary of the Invention

[0005] One of the purposes of this application is to provide a safety protection method, device, vehicle and electronic device for a vehicle power supply system, which can effectively adjust the electrical loads, ensure the safe operation of the vehicle power supply system, and improve the user experience.

[0006] To achieve the above purpose, the technical solution adopted in this application is as follows: According to the first aspect provided by this application, a safety protection method for a vehicle power supply system is provided. The power supply system provides low-voltage power to electrical loads mounted on a bus. The method includes: in the case where the output power of the bus is less than the load demand power, obtaining the configuration information of the electrical loads, where the configuration information shows the power consumption reduction amount and user perception degree when the electrical loads are downgraded from a first power level to a second power level; the first power level and the second power level are any two of the multiple power levels corresponding to the electrical loads. Calculating the deficit power of the bus. Based on the deficit power, the power consumption reduction amount and the user perception degree, adjusting the electrical loads; where the adjusted output power is greater than or equal to the load demand power.

[0007] According to the above technical means, the present application can quantify the user's perception when the power level of the electrical load is lowered, and determine the power consumption reduction amount when the power level of the electrical load is lowered, providing a basis for subsequent adjustment of the electrical load. By calculating the deficit power of the bus, the load power that needs to be reduced can be clarified; then, combining multi-dimensional information such as the power consumption reduction amount, user perception, and deficit power of the bus, while taking into account the user's perception experience, the electrical load is adjusted so that the output power of the bus reaches balance with the load demand power, and then to ensure the safe and stable operation of the power supply system.

[0008] In a possible way, the above power supply system includes: a power battery and a DC-DC converter. The DC-DC converter is used to convert the high-voltage power provided by the power battery into low-voltage power, and the output end of the DC-DC converter is connected to the bus. On this basis, the determination process that the output power of the bus is less than the load demand power includes: when the voltage at the output end of the DC-DC converter is continuously less than the first preset voltage for the first preset time, it is determined that the output power of the bus is less than the load demand power. Wherein, the first preset voltage is the voltage at the output end of the DC-DC converter when the bus cannot supply power to the electrical load normally.

[0009] According to the above technical means, when the supply and demand are balanced, the output power of the bus is greater than or equal to the load demand power, and the voltage at the output end of the DC-DC converter will be maintained at a stable voltage value (i.e., the rated voltage). As the load demand gradually increases, the supply and demand balance is broken, and the voltage at the output end of the DC-DC converter will be gradually pulled down. When the voltage at the output end of the DC-DC converter is pulled down to a certain value (i.e., the first preset voltage), the normal power supply to the electrical load cannot be guaranteed. Therefore, in the present application, when it is recognized that the voltage at the output end of the DC-DC converter is continuously less than the first preset voltage for the first preset time, it can be determined that the output power of the bus is less than the load demand power. Wherein, the setting of the first preset time is to avoid the influence of the instantaneous voltage fluctuation at the output end of the DC-DC converter on the judgment.

[0010] In a possible way, the determination process that the output power of the bus is less than the load demand power further includes: when the actual current of the bus is continuously greater than the rated current of the DC-DC converter for the second preset time, it is determined that the output power of the bus is less than the load demand power.

[0011] According to the above technical means, when the supply and demand are balanced, the actual current of the bus is equal to the output current of the DC-DC converter, and the output current of the DC-DC converter is the rated current. As the load demand gradually increases, when the load demand is greater than the supply, the output voltage of the DC-DC converter will be pulled down. Since the rated power of the DC-DC converter is fixed, the output current of the DC-DC converter will be gradually increased. When the actual current of the bus is greater than the rated current of the DC-DC converter, normal power supply to the electrical load cannot be guaranteed. Therefore, in this application, when it is recognized that the actual current of the bus is greater than the rated current of the DC-DC converter for a second preset time continuously, it is determined that the output power of the bus is less than the load demand power. Among them, the setting of the second preset time is to avoid the influence of the instantaneous current fluctuation at the output end of the DC-DC converter on the judgment.

[0012] In a possible way, the above power supply system further includes a storage battery. When the output voltage of the DC-DC converter is less than the rated voltage of the DC-DC converter, the storage battery supplies low-voltage power to the bus. On this basis, the determination process of the output power of the bus being less than the load demand power further includes: when the output voltage of the storage battery is less than the second preset voltage for a third preset time continuously, it is determined that the output power of the bus is less than the load demand power, where the second preset voltage is the output voltage of the storage battery when the bus cannot supply power to the electrical load normally.

[0013] According to the above technical means, the storage battery and the DC-DC converter are connected in parallel to the bus. Theoretically, the output voltage of the storage battery is the same as the output voltage of the DC-DC converter. However, due to the line resistance in the line connecting the storage battery and the DC-DC converter, actually the output voltage of the storage battery will be slightly lower than the output voltage of the DC-DC converter. When the supply and demand are balanced, the output power of the bus is greater than or equal to the load demand power, and the output voltage of the storage battery will be maintained at a stable voltage value (i.e., the rated voltage). As the load demand gradually increases, the balance between supply and demand is broken, and the output voltage of the storage battery will be gradually pulled down. When the output voltage of the storage battery is pulled down to a certain value (i.e., the second preset voltage), normal power supply to the electrical load cannot be guaranteed. Therefore, in this application, when it is recognized that the output voltage of the storage battery is less than the second preset voltage for a third preset time continuously, it can be determined that the output power of the bus is less than the load demand power. Among them, the setting of the third preset time is to avoid the influence of the instantaneous voltage fluctuation at the output end of the storage battery on the judgment.

[0014] In a possible way, the determination process of the output power of the bus being less than the load demand power further includes: when the DC-DC converter fails, it is determined that the output power of the bus is less than the load demand power.

[0015] According to the above technical means, the output power of the bus in this application is approximately equal to the output power of the DC-DC converter. When the DC-DC converter fails, the output power of the bus is approximately 0, which is much less than the load demand power. Therefore, when the DC-DC converter fails, it can be determined that the output power of the bus is less than the load demand power.

[0016] In a possible way, calculating the deficit power of the bus includes: determining the difference between the load demand power and the rated power of the DC-DC converter as the deficit power.

[0017] In a possible way, the calculation process of the load demand power includes: classifying the electrical loads. Calculating the total rated power of each type of electrical load. Determining the equivalent electrical power of each type of electrical load as the product of the total rated power of each type of electrical load and the power coefficient of each type of electrical load. Determining the sum value of the equivalent electrical powers of each type of electrical load as the load demand power.

[0018] According to the above technical means, by introducing the power coefficient, this application can more truly reflect the power consumption situation of electrical loads during actual operation, avoid calculation deviations caused by simply adding the rated powers directly, improve the accuracy of calculating the load demand power, and provide reliable data support for subsequent adjustment of electrical loads.

[0019] In a possible way, adjusting the electrical loads based on the deficit power, power consumption reduction amount, and user perception includes: determining the driving state of the vehicle. Adjusting the electrical loads based on the driving state, deficit power, power consumption reduction amount, and user perception; where the driving state is driving or parking.

[0020] According to the above technical means, based on considering the deficit power, power consumption reduction amount, and user perception, and further combining the driving state of the vehicle, this application can adjust the non-essential electrical loads corresponding to the driving state or parking state, thereby ensuring the stable operation of the vehicle.

[0021] In a possible way, adjusting the electrical loads based on the driving state, deficit power, power consumption reduction amount, and user perception includes: determining the electrical loads that meet the first preset condition in the electrical loads as the candidate electrical loads; where the first preset condition is not being on the prohibited adjustment list corresponding to the driving state. Taking the total power consumption reduction amount of the candidate electrical loads after adjustment being greater than or equal to the deficit power and the total user perception of the candidate electrical loads after adjustment being the smallest as the goal, generating an adjustment plan for the candidate electrical loads. Adjusting the power levels of the candidate electrical loads based on the adjustment plan.

[0022] According to the above technical means, in the present application, by presetting a prohibited adjustment list, it is possible to avoid misadjusting key power-consuming loads corresponding to the driving state of the vehicle (such as power-consuming loads related to driving during the driving state). In addition, with the goal that the total power consumption reduction of the candidate power-consuming loads after adjustment is greater than or equal to the deficit power and the total user perception of the candidate power-consuming loads after adjustment is minimized, the adjustment plan can not only meet the deficit power requirement, but also preferentially adjust the power-consuming loads with low user perception, effectively guaranteeing the user experience.

[0023] According to a second aspect provided by the present application, there is provided a safety protection device for a vehicle power supply system. The power supply system can provide low-voltage power to power-consuming loads mounted on a bus. The device includes: an acquisition module, a calculation module, and an adjustment module.

[0024] The acquisition module is configured to, when the output power of the bus is less than the load demand power, acquire the configuration information of the power-consuming load, where the configuration information shows the power consumption reduction amount and user perception when the power-consuming load is downgraded from a first power level to a second power level; the first power level and the second power level are any two of the multiple power levels corresponding to the power-consuming load.

[0025] The calculation module is configured to calculate the deficit power of the bus.

[0026] The adjustment module is configured to adjust the power-consuming load based on the deficit power, the power consumption reduction amount, and the user perception; wherein the output power after adjustment is greater than or equal to the load demand power.

[0027] In a possible way, the above power supply system includes: a power battery and a DC-DC converter. The DC-DC converter is configured to convert the high-voltage power provided by the power battery into low-voltage power, and the output end of the DC-DC converter is connected to the bus. On this basis, the acquisition module further includes: a first determination subunit. The first determination subunit is configured to, when the output voltage of the DC-DC converter is continuously less than a first preset voltage for a first preset time, determine that the output power of the bus is less than the load demand power; wherein the first preset voltage is the output voltage of the DC-DC converter when the bus cannot supply power to the power-consuming load normally.

[0028] In a possible way, the first determination subunit is specifically configured to, when the actual current of the bus is continuously greater than the rated current of the DC-DC converter for a second preset time, determine that the output power of the bus is less than the load demand power.

[0029] In a possible way, the above power supply system further includes a storage battery. When the output voltage of the DC-DC converter is less than the rated voltage of the DC-DC converter, the storage battery supplies low-voltage power to supplement the bus. On this basis, the first determination subunit is specifically configured to determine that the output power of the bus is less than the load demand power when the output voltage of the storage battery is less than the second preset voltage for a third preset time continuously; wherein, the second preset voltage is the output voltage of the storage battery when the bus cannot supply power to the electrical load normally.

[0030] In a possible way, the first determination subunit is specifically configured to determine that the output power of the bus is less than the load demand power when the DC-DC converter fails.

[0031] In a possible way, the calculation module is specifically configured to determine the deficit power as the difference between the load demand power and the rated power of the DC-DC converter.

[0032] In a possible way, the calculation module further includes: a classification subunit, a calculation subunit, a second determination subunit, and a third determination subunit. Among them, the classification subunit is used to classify the electrical loads. The calculation subunit is used to calculate the total rated power of each type of electrical load. The second determination subunit is used to determine the equivalent electrical power of each type of electrical load as the product of the total rated power of each type of electrical load and the power factor of each type of electrical load. The third determination subunit is used to determine the sum value of the equivalent electrical powers of each type of electrical load as the load demand power.

[0033] In a possible way, the adjustment unit further includes: a fourth determination subunit and an adjustment subunit. Among them, the fourth determination subunit is used to determine the driving state of the vehicle. The adjustment subunit is used to adjust the electrical load based on the driving state, the deficit power, the power consumption reduction amount, and the user perception; wherein, the driving state is driving or parking.

[0034] In a possible way, the adjustment subunit is specifically configured to determine the electrical loads that meet the first preset condition in the electrical loads as the candidate electrical loads; wherein, the first preset condition is not being on the prohibited adjustment list corresponding to the driving state. Taking the total power consumption reduction amount of the candidate electrical loads after adjustment being greater than or equal to the deficit power and the total user perception of the candidate electrical loads after adjustment being the smallest as the goal, generate an adjustment plan for the candidate electrical loads. Based on the adjustment plan, adjust the power level of the candidate electrical loads.

[0035] According to the third aspect provided by the present application, a vehicle is provided. The vehicle uses the safety protection method of the vehicle power supply system in the above first aspect and any of its possible implementation manners for power supply protection.

[0036] According to a fourth aspect provided by the present application, there is provided an electronic device, including: a processor; a memory for storing instructions executable by the processor; wherein, the processor is configured to execute the instructions to implement the method according to the first aspect and any possible implementation manner thereof as described above.

[0037] According to a fifth aspect provided by the present application, there is provided a computer-readable storage medium, when the instructions in the computer-readable storage medium are executed by the processor of the electronic device, enabling the electronic device to execute the method according to the first aspect and any possible implementation manner thereof as described above.

[0038] According to a sixth aspect provided by the present application, there is provided a computer program product, the computer program product includes computer instructions, when the computer instructions run on the electronic device, enabling the electronic device to execute the method according to the first aspect and any possible implementation manner thereof as described above.

[0039] Therefore, the above technical features of the present application have the following beneficial effects: (1) It is possible to quantify the user's perception when the power level of the electrical load is lowered, and determine the power consumption reduction amount when the power level of the electrical load is lowered, providing a basis for subsequent adjustment of the electrical load. By calculating the deficit power of the bus, the load power that needs to be reduced can be clarified; then, combining multi-dimensional information such as the power consumption reduction amount, user perception, and deficit power of the bus, while taking into account the user's perception experience, the electrical load is adjusted so that the output power of the bus reaches balance with the load demand power, and further ensure the safe and stable operation of the power supply system.

[0040] (2) When the supply and demand are balanced, the output power of the bus is greater than or equal to the load demand power, and the output voltage of the DC-DC converter will be maintained at a stable voltage value (i.e., the rated voltage). As the load demand gradually increases, the supply and demand balance is broken, and the output voltage of the DC-DC converter will be gradually pulled down. When the output voltage of the DC-DC converter is pulled down to a certain value (i.e., the first preset voltage), it will not be possible to ensure the normal power supply to the electrical load. Therefore, in the present application, when it is recognized that the output voltage of the DC-DC converter is continuously less than the first preset voltage for the first preset time, it can be determined that the output power of the bus is less than the load demand power. Among them, the setting of the first preset time is to avoid the influence of instantaneous voltage fluctuations at the output end of the DC-DC converter on the judgment.

[0041] (3) By introducing the power factor, it can more truly reflect the power consumption situation of the electrical load during actual operation, avoid calculation deviations caused by simply adding the rated powers directly, improve the accuracy of calculating the load demand power, and provide reliable data support for subsequent adjustment of the electrical load.

[0042] (4) Based on considering the deficit power, the power consumption reduction amount, and the user perception, further combined with the driving state of the vehicle, the non-essential electrical loads corresponding to the driving state or the parking state can be adjusted, thereby ensuring the stable operation of the vehicle.

[0043] (5) By presetting a prohibited adjustment list, it is possible to avoid misadjusting the key electrical loads corresponding to the driving state of the vehicle (such as the electrical loads related to driving during the driving state). In addition, with the goal that the total power consumption reduction amount of the candidate electrical loads after adjustment is greater than or equal to the deficit power and the total user perception of the candidate electrical loads after adjustment is minimized, the adjustment scheme not only meets the deficit power requirement but also can preferentially adjust the electrical loads with low user perception, effectively ensuring the user experience. Description of the Drawings

[0044] Figure 1 It is an architecture diagram of a vehicle power supply system provided by an embodiment of the present application; Figure 2 It is a schematic flowchart of a safety protection method for a vehicle power supply system provided by an embodiment of the present application; Figure 3 It is a curve graph of the power consumption of a blower at different power levels provided by an embodiment of the present application; Figure 4 It is a schematic structural diagram of a safety protection device for a vehicle power supply system provided by an embodiment of the present application; Figure 5 It is a block diagram of an electronic device provided by an embodiment of the present application. Detailed Embodiments

[0045] In order to enable those of ordinary skill in the art to better understand the technical solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0046] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and do not necessarily need to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of the present application described here can be implemented in an order other than those illustrated or described here. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0047] In the embodiments of the present application, words such as "exemplary", "such as", or "for example" are used to represent examples, illustrations, or explanations. Any embodiment or design solution described as "exemplary", "such as", or "for example" in the embodiments of the present application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Rather, the use of words such as "exemplary", "such as", or "for example" is intended to present related concepts in a specific manner.

[0048] First, the related technologies involved in the present application are explained to facilitate the understanding of those skilled in the art.

[0049] In the field of new energy vehicles, the DC-DC converter plays a crucial role. It can convert the high-voltage direct current output by the power battery into low-voltage direct current that can be directly used by low-voltage loads, providing stable power support for various low-voltage loads in the vehicle, thereby ensuring the normal operation of each system of the vehicle.

[0050] Under the actual operating conditions of new energy vehicles, the operating state of low-voltage loads is uncertain, and its operating conditions are difficult to accurately predict, which may lead to a situation where the total demand power of the load is greater than the output power of the DC-DC converter. When this situation occurs, the voltage at the output end of the DC-DC converter and the operating voltage of the low-voltage load will fluctuate. If effective protection measures are not taken in a timely manner, it may affect the normal operation of the DC-DC converter and the low-voltage load, and further affect the stability and reliability of the entire vehicle power supply system.

[0051] Currently, traditional power supply system protection measures usually adopt simple switch control logic, that is, to turn off fixed low-voltage loads. This fixed low-voltage load shutdown strategy does not fully consider the actual usage needs and user experience of users. After turning off some low-voltage loads, it may have a greater impact on the normal use of vehicle functions by users, causing inconvenience to users during actual use and reducing the overall satisfaction of users with the vehicle.

[0052] To solve the above technical problems, an embodiment of the present application provides a safety protection method for a vehicle power supply system, which can filter out the instantaneous voltage fluctuations at the output end of the DC-DC converter by setting the judgment condition for a continuous first preset time, and avoid mis-triggering the power deficit judgment. In addition, when the supply and demand are balanced, that is, the output power of the bus is greater than or equal to the load demand power, the output voltage of the DC-DC converter will be maintained at a stable voltage value (i.e., the rated voltage). As the demand gradually increases, the balance between supply and demand is broken, and the output voltage of the DC-DC converter will be gradually pulled down. When the output voltage of the DC-DC converter is pulled down to a certain value (i.e., the first preset voltage), the normal power supply to the electrical load cannot be guaranteed. Therefore, by judging whether the output voltage of the DC-DC converter is less than the first preset voltage, it is possible to accurately identify whether the output power of the bus is less than the load demand power.

[0053] Next, the technical solutions in the embodiments of the present application will be described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments.

[0054] The safety protection method for the vehicle power supply system provided by the embodiment of the present application can be applied to vehicles. Vehicles can also be referred to as transportation means (vehicle), mobile carriers (mobile carrier), electric vehicles (electric vehicle, EV), hybrid electric vehicles (hybrid electric vehicle, HEV), plug-in hybrid electric vehicles (plug-in hybrid electric vehicle, PHEV), fuel cell vehicles (fuel cell vehicle, FCV), autonomous vehicles (autonomous vehicle), intelligent and connected vehicles (intelligent and connected vehicle, ICV), driverless vehicles (driverless vehicle), etc.

[0055] In the embodiment of the present application, the vehicle can be a sedan, a sport utility vehicle (SUV), a truck, an electric vehicle, a motorcycle, a tricycle, a special vehicle (such as an ambulance, a fire truck, a police car, etc.), a driverless taxi, an intelligent and connected bus, an autonomous logistics vehicle, an electric truck, etc. In addition, this method is also applicable to various special vehicles, such as agricultural vehicles, mining vehicles, forestry vehicles, airport vehicles, port vehicles, etc. The present application does not make specific limitations in this regard.

[0056] Figure 1 It is an architecture diagram of a vehicle power supply system provided by an embodiment of the present application. As Figure 1As shown in the figure, the system architecture includes: a vehicle control unit (VCU) 101, an electrical load 102, a DC-DC converter 103, a power battery 104, and a storage battery 105 deployed in a vehicle 100.

[0057] Optionally, Figure 1 a communication connection can be established between the VCU 101 and the electrical load 102, the DC-DC converter 103, the power battery 104, and the storage battery 105 in . A communication connection can be established between the DC-DC converter 103 and the electrical load 102. A communication connection can be established between the storage battery 105 and the electrical load 102. A communication connection can be established between the DC-DC converter 103 and the storage battery 105. A communication connection can be established between the power battery 104 and the DC-DC converter 103 and the storage battery 105.

[0058] Among them, the DC-DC converter 103 can be used to convert the high-voltage power provided by the power battery 104 into low-voltage power and supply the low-voltage power to the electrical load 102 mounted on the bus. The storage battery 105 can be used to supply the low-voltage power to the electrical load 102 mounted on the bus. The VCU 101 can be used to control the DC-DC converter 103 or the storage battery 105 to supply the low-voltage power to the electrical load 102.

[0059] In the embodiment of the present application, when the output power of the bus (i.e., the output power of the DC-DC converter 103) is less than the load demand power, the VCU 101 can obtain the configuration information of the electrical load 102, where the configuration information includes the power consumption reduction amount and the user perception degree when the electrical load 102 is downgraded from the first power level to the second power level. After that, the VCU 101 can calculate the deficit power of the bus and adjust the electrical load 102 based on the deficit power, the power consumption reduction amount, and the user perception degree.

[0060] The above-mentioned user perception degree when the electrical load 102 is downgraded from the first power level to the second power level is used to measure the user discomfort degree when the electrical load 102 is downgraded from the first power level to the second power level, and it is a value determined according to experience.

[0061] For example, the air conditioner itself has 8 wind speeds, and the 8 wind speeds respectively correspond to 8 power levels of the blower inside the air conditioner. Reducing the power level of the blower will cause the wind speed of the air conditioner to decrease, and it is very easy for users to perceive the change in wind speed during driving. If the power level of the blower is reduced from the power level corresponding to the 8th wind speed to the power level corresponding to the 7th wind speed, the wind speed adjustment amount is relatively small and the user perception is relatively small. If the power level of the blower is reduced from the power level corresponding to the 8th wind speed to the power level corresponding to the 3rd wind speed, the wind speed adjustment amount is relatively large and the user perception is relatively large. And the 8th wind speed is the ideal air conditioner wind speed for users. The greater the user perception, the stronger the degree of violating the user's will, and the higher the user discomfort level.

[0062] Another example: The driving state of the vehicle is driving or parking. The power consumption requirements (perception) for the same electrical load 102 are different under different driving states. When the driving state of the vehicle is parking, the user's dependence on the air conditioner outside the vehicle decreases, and the change amount of the user perception corresponding to reducing the power level of the blower is lower than that when the driving state of the vehicle is driving; similarly, the vehicle electrical load 102 can be an external power discharge manager used to connect external electrical appliances (such as induction cookers) outside the vehicle. Limiting the power level of the external power discharge manager can reduce the power consumption of the external electrical appliances. When the driving state of the vehicle is parking, the user's dependence on the external electrical appliances outside the vehicle increases, and the change amount of the user perception corresponding to reducing the power consumption of the external electrical appliances is higher than that when the driving state of the vehicle is driving.

[0063] It should be noted that the structure illustrated in the embodiments of the present application does not constitute a limitation on the vehicle 100. It may include more or fewer components than those shown, or combine certain components, or split certain components, or different component arrangements. The illustrated components can be implemented in hardware, software, or a combination of software and hardware.

[0064] For ease of understanding, the following specifically introduces the safety protection method for the vehicle power supply system provided by the present application in conjunction with the accompanying drawings.

[0065] Figure 2 It is a schematic flow chart of a safety protection method for a vehicle power supply system provided by an embodiment of the present application. As Figure 2 shown, the method includes: S201. When the output power of the bus is less than the load demand power, obtain the configuration information of the electrical load.

[0066] Among them, the configuration information shows the power consumption reduction amount and user perception when the electrical load is adjusted from the first power level to the second power level. The greater the reduction of the power level, the greater the corresponding power consumption reduction amount and the higher the user perception.

[0067] The first power level and the second power level are any two of multiple power levels corresponding to electrical loads. The higher the power level, the greater the power consumption of the electrical load.

[0068] In some embodiments, configuration information of each electrical load is stored in the vehicle. When it is determined that the output power of the bus is less than the total required power of the vehicle's electrical loads (which can also be referred to as low-voltage loads), the vehicle can obtain the power consumption reduction amount and user perception when each electrical load is downgraded from the first power level to the second power level.

[0069] In one example, taking the blower as an example, Figure 3 shows the power consumption of the blower at different power levels. Figure 3 The horizontal axis represents the power level, and the vertical axis represents the power consumption, with the unit of watt (W). As Figure 3 shown, the power levels corresponding to the blower can include level 1 - level 8. Among them, when the power level is 8, the blower has the highest gear and the largest power consumption (300W). When the power level is 1, the blower has the lowest gear and the smallest power consumption (0W).

[0070] In one example, combining the above Figure 3 , Table 1 shows the configuration information of the blower, that is, the power consumption reduction amount and user perception when the blower is downgraded from power level 8 to levels 7 - 1 respectively. For example, when the power level of the blower is downgraded from 8 to 7, the power consumption reduction amount is 90W, and the user perception is 1.

[0071] Table 1 Configuration Information of Blower

[0072] S202. Calculate the deficit power of the bus.

[0073] In some embodiments, the vehicle can determine the load required power and determine the difference between the load required power and the rated power of the DC - DC converter as the deficit power of the bus. The calculation method of the load required power can refer to the introduction in the following embodiments and will not be elaborated here.

[0074] Exemplarily, the deficit power of the bus satisfies the following formula 1.

[0075] (Formula 1).

[0076] Wherein, represents the deficit power, represents the load required power, represents the rated power of the DC - DC converter.

[0077] S203. Adjust the electrical load based on the deficit power, power consumption reduction amount, and user perception.

[0078] Among them, the adjusted output power is greater than or equal to the load demand power.

[0079] In some embodiments, with the constraint that the output power of the adjusted bus is greater than or equal to the load demand power, when the power demand is met, the vehicle can preferentially lower the electrical loads with a large power consumption reduction and low user perception to minimize the impact on the user experience.

[0080] Based on the above technical solutions, the user's perception when the power level of the electrical load is lowered can be quantified, and the power consumption reduction amount when the power level of the electrical load is lowered can be determined, providing a basis for subsequent adjustment of the electrical load. By calculating the deficit power of the bus, the load power that needs to be reduced can be clarified; then, combining multi-dimensional information such as the power consumption reduction amount, user perception, and the deficit power of the bus, the electrical load is adjusted while taking into account the user's perception experience, so that the output power of the bus reaches balance with the load demand power, and further ensure the safe and stable operation of the power supply system.

[0081] In an alternative implementation, the power supply system provided by the embodiments of the present application may include: a power battery, a DC-DC converter, and a storage battery. Among them, the DC-DC converter can be used to convert the high-voltage power provided by the power battery into low-voltage power, and the output end of the DC-DC converter is connected to the bus. The storage battery is used to supplement and provide low-voltage power to the bus when the output voltage of the DC-DC converter is less than the rated voltage of the DC-DC converter. On this basis, in the above S201, the determination process that the output power of the bus is less than the load demand power may include: In some embodiments, when the output voltage of the DC-DC converter is less than the first preset voltage for a first preset time continuously, the vehicle can determine that the output power of the bus is less than the load demand power.

[0082] Among them, the first preset voltage is the output voltage of the DC-DC converter when the bus cannot supply power to the electrical load normally.

[0083] Optionally, the first preset voltage and the first preset time can be determined according to the actual situation. For example, the first preset voltage can be 12.7 volts (V), and the first preset time can be 5 minutes (min), 6 min, etc., which are not limited thereto.

[0084] Exemplarily, if the output voltage of the DC-DC converter continuously remains less than 12.7 V within 5 min continuously, it can be determined that the output power of the bus is less than the load demand power.

[0085] In some other embodiments, when the output terminal voltage of the storage battery is continuously less than the second preset voltage for a third preset time, the vehicle can determine that the output power of the bus is less than the load demand power.

[0086] Wherein, the second preset voltage is the output terminal voltage of the storage battery when the bus cannot supply power to the electrical load normally.

[0087] Optionally, the storage battery may include one or more low-voltage batteries with specifications such as 12V, 24V, 48V, etc., such as lead-acid batteries, lithium batteries, sodium-ion batteries, etc. There is no limitation on this.

[0088] Optionally, the second preset voltage and the third preset time can be determined according to the actual situation. For example, the second preset voltage can be between 11.7V and 12V, and the third preset time can be 5min, 6min, etc. There is no limitation on this.

[0089] Exemplarily, taking the second preset voltage as 12V as an example, if the output terminal voltage of the storage battery is continuously less than 12V within 5 minutes, it can be determined that the output power of the bus is less than the load demand power.

[0090] In some other embodiments, when the actual current of the bus is continuously greater than the rated current of the DC-DC converter for a second preset time, the vehicle can determine that the output power of the bus is less than the load demand power.

[0091] Wherein, the rated current of the DC-DC converter is determined based on the rated power and rated voltage of the DC-DC converter. The rated power of the DC-DC converter can be determined according to the actual situation. For example, the rated power of the DC-DC converter can be between 2.5 kilowatts (kW) and 4 (kW). There is no limitation on this.

[0092] Exemplarily, the rated current of the DC-DC converter satisfies the following formula 2.

[0093] (Formula 2).

[0094] Wherein, represents the rated current of the DC-DC converter, represents the rated power of the DC-DC converter, represents the rated voltage of the DC-DC converter.

[0095] Optionally, the second preset time can be determined according to the actual situation. For example, the second preset time can be 5min, 6min, etc. There is no limitation on this.

[0096] Exemplarily, if the actual current of the bus is continuously less than , it can be determined that the output power of the bus is less than the load demand power.

[0097] In some other embodiments, in the case of a DC-DC converter failure, the vehicle can determine that the output power of the bus is less than the load demand power.

[0098] Based on the above technical solutions, by setting multiple judgment conditions such as continuous preset time, preset voltage, DC-DC converter rated current or fault status, etc., the accuracy of power deficit (i.e., whether the output power of the bus is less than the load demand power) judgment can be ensured, and it can also provide a basis for subsequent power consumption load adjustment strategies.

[0099] In an alternative embodiment, in S202 above, the calculation process of the load demand power may include: the vehicle can classify the power consumption loads and calculate the total rated power of each type of power consumption load. Then, the vehicle can determine the equivalent power consumption of each type of power consumption load as the product of the total rated power of each type of power consumption load and the power coefficient of each type of power consumption load. Finally, the vehicle can determine the sum value of the equivalent power consumption of each type of power consumption load as the load demand power.

[0100] Optionally, the types of power consumption loads may include power domain types, chassis platform types, collision types, thermal management system types, vehicle control domain types, intelligent driving domain types, etc., which are not limited herein.

[0101] In one example, as shown in Table 2, the power domain types include power consumption loads A1 - An, such as air suspension, etc., which are not limited herein. The chassis platform types include power consumption loads B1 - Bn, such as electric power steering controllers, etc., which are not limited herein. The collision types include power consumption loads C1 - Cn, such as airbag control units, etc., which are not limited herein. The thermal management system types include power consumption loads D1 - Dn, such as air conditioning control units, battery cooling controllers, etc., which are not limited herein. The vehicle control domain types include power consumption loads E1 - En, such as lighting control modules, seat control modules, etc., which are not limited herein. The intelligent driving domain types include power consumption loads F1 - Fn, such as cameras, radars, etc., which are not limited herein.

[0102] Among them, the rated power of power consumption load A1 is a1, the rated power of power consumption load An is an, and the rated powers of other types of power consumption loads can refer to Table 2 and will not be elaborated herein.

[0103] Table 2 Classification of power consumption loads and rated powers of each power consumption load

[0104] In one example, Table 3 shows the power factor of each type of electrical load. Among them, the power factor of each type of electrical load is determined based on the ambient temperature, slope, and vehicle operating scenario in the calibration test.

[0105] Table 3 Power Factor of Each Type of Electrical Load

[0106] Exemplarily, in combination with the above content, the load demand power satisfies the following formula 3.

[0107] (Formula 3).

[0108] Among them, an represents the total rated power of the electrical loads in the power domain category, represents the total rated power of the electrical loads in the chassis platform category, represents the total rated power of the electrical loads in the collision category, represents the total rated power of the electrical loads in the thermal management system category, represents the total rated power of the electrical loads in the vehicle control domain category, represents the total rated power of the electrical loads in the intelligent driving domain category.

[0109] Based on the above technical solution, by introducing the power factor, it is possible to more realistically reflect the power consumption of electrical loads during actual operation, avoid calculation errors caused by simply adding the rated powers directly, improve the accuracy of calculating the load demand power, and provide reliable data support for subsequent adjustment of electrical loads.

[0110] In an optional implementation manner, the above S203 may specifically include: The vehicle can determine the driving state of the vehicle and adjust the electrical load based on the driving state, deficit power, power consumption reduction amount, and user perception.

[0111] Among them, the driving state is driving or parking. The driving state refers to the state where the vehicle is in dynamic operation, that is, the vehicle moves on the road by driving the wheels with the engine. The parking state refers to the state where the vehicle is fixed in place after stopping driving to prevent it from sliding or moving through specific operations, such as pulling up the handbrake (mechanical handbrake) or pressing the electronic parking button (electronic handbrake) to lock the four-wheel braking system to prevent the vehicle from rolling back.

[0112] In some embodiments, the vehicle may determine the electrical loads that meet the first preset condition among the electrical loads as candidate electrical loads, and then generate an adjustment plan for the candidate electrical loads with the goal that the total power consumption reduction of the adjusted candidate electrical loads is greater than or equal to the deficit power (hereinafter referred to as the first constraint condition), and the total user perception of the adjusted candidate electrical loads is minimized. Finally, the vehicle may adjust the power levels of the candidate electrical loads based on the adjustment plan.

[0113] Among them, the first preset condition is the prohibited adjustment list corresponding to the non-driving state. For example, the prohibited adjustment list corresponding to the driving state may include the engine control unit, the battery management system, the sensor system, etc., and the prohibited adjustment list corresponding to parking may include the battery management system, the charging interface control unit, etc., which is not limited herein.

[0114] Exemplarily, the first constraint condition satisfies the following formulas 4 and 5, and the total user perception of the candidate electrical loads satisfies the following formula 6.

[0115] (Formula 4).

[0116] (Formula 5).

[0117] Among them, represents the number of candidate electrical loads, represents the current power level, represents the power level to be lowered to, represents the th electrical load at the power level power consumption, represents the th electrical load at the power level power consumption, represents the th electrical load from the power level lowered to the power level power consumption reduction, represents the th electrical load corresponding indication variable, , represents the deficit power.

[0118] E = (Formula 6) 。

[0119] Among them, represents the th electrical load from the power level lowered to the power level The user perception degree of , and E represents the total user perception degree of the candidate electrical loads to be selected.

[0120] Based on the above technical solution, by presetting the prohibited adjustment list, it is possible to avoid misadjusting the key electrical loads corresponding to the driving state of the vehicle (such as the electrical loads related to driving during the driving state). In addition, with the goal that the total power consumption reduction of the candidate electrical loads after adjustment is greater than or equal to the power shortage and the total user perception degree of the candidate electrical loads after adjustment is minimized, the adjustment plan not only meets the power shortage requirement but also can preferentially adjust the electrical loads with low user perception, effectively guaranteeing the user experience.

[0121] Figure 4 It is a schematic structural diagram of a safety protection device for a vehicle power supply system provided by an embodiment of the present application, as Figure 4 shown. The safety protection device of the vehicle power supply system includes: an acquisition module 401, a calculation module 402, and an adjustment module 403.

[0122] The acquisition module 401 is configured to obtain the configuration information of the electrical load when the output power of the bus is less than the load demand power, where the configuration information shows the power consumption reduction amount and the user perception degree when the electrical load is adjusted from the first power level to the second power level; the first power level and the second power level are any two of the multiple power levels corresponding to the electrical load.

[0123] The calculation module 402 is configured to calculate the power shortage of the bus.

[0124] The adjustment module 403 is configured to adjust the electrical load based on the power shortage, the power consumption reduction amount, and the user perception degree; where the output power after adjustment is greater than or equal to the load demand power.

[0125] In a possible way, the above power supply system includes: a power battery and a DC-DC converter. The DC-DC converter is configured to convert the high-voltage power provided by the power battery into low-voltage power, and the output end of the DC-DC converter is connected to the bus. On this basis, the acquisition module 401 further includes: a first determination sub-module. The first determination sub-module is configured to determine that the output power of the bus is less than the load demand power when the voltage at the output end of the DC-DC converter is continuously less than the first preset voltage for the first preset time; where the first preset voltage is the voltage at the output end of the DC-DC converter when the bus cannot supply power to the electrical load normally.

[0126] In a possible way, the first determination sub-module is specifically configured to determine that the output power of the bus is less than the load demand power when the actual current of the bus is continuously greater than the rated current of the DC-DC converter for the second preset time.

[0127] In a possible way, the above power supply system further includes a storage battery. When the output voltage of the DC-DC converter is less than the rated voltage of the DC-DC converter, the storage battery supplies low-voltage power to supplement the bus. On this basis, the first determination sub-module is specifically configured to determine that the output power of the bus is less than the load demand power when the output voltage of the storage battery is continuously less than a second preset voltage for a third preset time; wherein, the second preset voltage is the output voltage of the storage battery when the bus cannot supply power to the electrical load normally.

[0128] In a possible way, the first determination sub-module is specifically configured to determine that the output power of the bus is less than the load demand power when the DC-DC converter fails.

[0129] In a possible way, the calculation module 402 is specifically configured to determine the difference between the load demand power and the rated power of the DC-DC converter as the deficit power.

[0130] In a possible way, the calculation module 402 further includes: a classification sub-module, a calculation sub-module, a second determination sub-module, and a third determination sub-module. Among them, the classification sub-module is used to classify the electrical loads. The calculation sub-module is used to calculate the total rated power of each type of electrical load. The second determination sub-module is used to determine the product of the total rated power of each type of electrical load and the power factor of each type of electrical load as the equivalent electrical power of each type of electrical load. The third determination sub-module is used to determine the sum value of the equivalent electrical powers of each type of electrical load as the load demand power.

[0131] In a possible way, the adjustment module 403 further includes: a fourth determination sub-module and an adjustment sub-module. Among them, the fourth determination sub-module is used to determine the driving state of the vehicle. The adjustment sub-module is used to adjust the electrical load based on the driving state, the deficit power, the power consumption reduction amount, and the user perception; wherein, the driving state is driving or parking.

[0132] In a possible way, the adjustment sub-module is specifically configured to determine the electrical loads that meet the first preset condition in the electrical loads as the candidate electrical loads; wherein, the first preset condition is not in the prohibited adjustment list corresponding to the driving state. Taking the total power consumption reduction amount of the adjusted candidate electrical loads being greater than or equal to the deficit power and the total user perception of the adjusted candidate electrical loads being the smallest as the goal, generate an adjustment plan for the candidate electrical loads. Based on the adjustment plan, adjust the power level of the candidate electrical loads.

[0133] Figure 5 This is a block diagram of an electronic device provided by an embodiment of the present application. As Figure 5 shown, the electronic device includes but is not limited to: a processor 501 and a memory 502.

[0134] Among them, the above-mentioned memory 502 is used to store executable instructions of the above-mentioned processor 501. It can be understood that the above-mentioned processor 501 is configured to execute instructions to implement the battery charging method in the above-mentioned embodiments.

[0135] It should be noted that those skilled in the art can understand that Figure 5 the structure of the electronic device shown in does not constitute a limitation on the electronic device. The electronic device may include more or fewer components than Figure 5 shown, or combine some components, or have different component arrangements.

[0136] The processor 501 is the control center of the electronic device, connecting various parts of the entire electronic device through various interfaces and lines. By running or executing software programs and / or modules stored in the memory 502, and calling data stored in the memory 502, it executes various functions of the electronic device and processes data, thereby monitoring the electronic device as a whole. The processor 501 may include one or more processing units. Optionally, the processor 501 may integrate an application processor and a modem processor. Among them, the application processor mainly processes the operating system, user interface, application programs, etc., and the modem processor mainly processes wireless communication. It can be understood that the above-mentioned modem processor may not be integrated into the processor 501 either.

[0137] The memory 502 can be used to store software programs and various data. The memory 502 mainly includes a program storage area and a data storage area. Among them, the program storage area can store the operating system, application programs required by at least one functional module (such as a determination unit, a processing unit, etc.), etc. In addition, the memory 502 may include high-speed random access memory, and may also include non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage devices.

[0138] In an exemplary embodiment, there is also provided a computer-readable storage medium including instructions, such as the memory 502 including instructions. The above-mentioned instructions can be executed by the processor 501 of the electronic device to implement the method in the above-mentioned embodiments.

[0139] In actual implementation, Figure 4 the functions of the acquisition module 401, the calculation module 402, and the adjustment module 403 in can all be Figure 5 implemented by the processor 501 in calling the computer program stored in the memory 502. The specific execution process can refer to the description of the method part in the above embodiments, and will not be elaborated here.

[0140] Optionally, the computer-readable storage medium may be a non-transitory computer-readable storage medium. For example, the non-transitory computer-readable storage medium may be a read-only memory (ROM), a random access memory (RAM), a CD-ROM, magnetic tape, a floppy disk, and an optical data storage device, etc.

[0141] In an exemplary embodiment, the embodiments of the present application further provide a computer program product including one or more instructions, and the one or more instructions may be executed by a processor 501 of an electronic device to complete the method in the above embodiments.

[0142] It should be noted that when the instructions in the above computer-readable storage medium or the one or more instructions in the computer program product are executed by the processor of the electronic device, the various processes of the above method embodiments are implemented, and the same technical effects as the above method can be achieved. To avoid repetition, it will not be elaborated here.

[0143] Through the description of the above embodiments, those skilled in the art can clearly understand that for the convenience and simplicity of description, only the division of the above functional modules is used as an example. In actual applications, the above functions can be allocated to different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above.

[0144] In several embodiments provided by the present application, it should be understood that the disclosed device and method can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of modules or units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point, the displayed or discussed coupling or direct coupling or communication connection between each other may be through some interfaces. The indirect coupling or communication connection of the device or unit may be in an electrical, mechanical or other form.

[0145] The units described as separate components may or may not be physically separated. The components displayed as units may be a physical unit or multiple physical units, that is, they may be located in one place, or may be distributed to multiple different places. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0146] In addition, in each embodiment of the present application, each functional unit can be integrated into a processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

[0147] When the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on such an understanding, the technical solution of the embodiments of the present application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. The software product is stored in a storage medium and includes several instructions for causing a device (which can be a single-chip microcomputer, a chip, etc.) or a processor to execute all or part of the steps of the methods of the various embodiments of the present application. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, ROM, RAM, magnetic disks, or optical discs that can store program codes.

[0148] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A safety protection method for a vehicle power supply system, the power supply system providing low-voltage power to electrical loads mounted on a bus; characterized in that, The method includes: When the output power of the bus is less than the load demand power, obtaining the configuration information of the electrical load, where the configuration information shows the power consumption reduction amount and user perception when the electrical load is down-regulated from the first power level to the second power level; the first power level and the second power level are any two of the multiple power levels corresponding to the electrical load; Calculating the deficit power of the bus; Based on the deficit power, the power consumption reduction amount, and the user perception, adjusting the electrical load; where after adjustment, the output power is greater than or equal to the load demand power.

2. The safety protection method for a vehicle power supply system according to claim 1, characterized in that, The power supply system includes: a power battery and a DC-DC converter; the DC-DC converter is used to convert the high-voltage power provided by the power battery into low-voltage power; the output end of the DC-DC converter is connected to the bus; The determination process for the output power of the bus being less than the load demand power includes: When the output voltage of the DC-DC converter is continuously less than the first preset voltage for a first preset time, determining that the output power of the bus is less than the load demand power; Wherein, the first preset voltage is the output voltage of the DC-DC converter when the bus cannot supply power to the electrical load normally.

3. The safety protection method of the vehicle power supply system according to claim 2, characterized in that The determination process for the output power of the bus being less than the load demand power further includes: When the actual current of the bus is continuously greater than the rated current of the DC-DC converter for a second preset time, determining that the output power of the bus is less than the load demand power.

4. The safety protection method for a vehicle power supply system according to claim 2, wherein The power supply system further includes a storage battery; the storage battery supplies supplementary low-voltage power to the bus when the output voltage of the DC-DC converter is less than the rated voltage of the DC-DC converter; The determination process for the output power of the bus being less than the load demand power further includes: When the output voltage of the storage battery is continuously less than the second preset voltage for a third preset time, determining that the output power of the bus is less than the load demand power; Wherein, the second preset voltage is the output voltage of the storage battery when the bus cannot supply power to the electrical load normally.

5. The safety protection method for a vehicle power supply system according to any one of claims 2-4, characterized in that, The determination process for the output power of the bus being less than the load demand power further includes: When the DC-DC converter fails, determining that the output power of the bus is less than the load demand power.

6. The safety protection method for a vehicle power supply system according to claim 1, characterized in that, The calculation of the deficit power of the bus includes: Taking the difference between the load demand power and the rated power of the DC-DC converter as the deficit power.

7. The safety protection method for a vehicle power supply system according to claim 1 or 6, characterized in that The calculation process of the load demand power includes: Classifying the electrical load; Calculating the total rated power of each type of electrical load; Taking the product of the total rated power of each type of electrical load and the power factor of each type of electrical load as the equivalent power consumption of each type of electrical load; Taking the sum value of the equivalent power consumption of each type of electrical load as the load demand power.

8. The safety protection method for a vehicle power supply system according to claim 1, characterized in that, The adjustment of the electrical load based on the deficit power, the power consumption reduction amount, and the user perception includes: Determining the driving state of the vehicle; Adjust the electrical load based on the driving state, the deficit power, the power consumption reduction amount, and the user perception; wherein the driving state is driving or parking.

9. The safety protection method for a vehicle power supply system according to claim 8, wherein The adjusting of the electrical load based on the driving state, the deficit power, the power consumption reduction amount, and the user perception includes: Determine the electrical loads that meet the first preset condition in the electrical load as candidate electrical loads; wherein the first preset condition is not being on the prohibited adjustment list corresponding to the driving state; Generate an adjustment plan for the candidate electrical loads with the goal that the total power consumption reduction amount of the candidate electrical loads after adjustment is greater than or equal to the deficit power and the total user perception of the candidate electrical loads after adjustment is minimized; Adjust the power levels of the candidate electrical loads based on the adjustment plan.

10. A safety protection device for a vehicle power supply system, the power supply system providing low-voltage power to electrical loads mounted on a bus; characterized in that, The device includes: An acquisition module, configured to acquire the configuration information of the electrical load when the output power of the bus is less than the load demand power, wherein the configuration information shows the power consumption reduction amount and the user perception when the electrical load is adjusted from the first power level to the second power level; the first power level and the second power level are any two of the multiple power levels corresponding to the electrical load; A calculation module, configured to calculate the deficit power of the bus; An adjustment module, configured to adjust the electrical load based on the deficit power, the power consumption reduction amount, and the user perception; wherein the output power after adjustment is greater than or equal to the load demand power.

11. A vehicle, characterized in that, The vehicle is powered and protected by using the safety protection method of the vehicle power supply system according to any one of claims 1-9.

12. An electronic device, characterized in that, It includes: A processor; A memory for storing instructions executable by the processor; Wherein, the processor is configured to execute the instructions to implement the safety protection method of the vehicle power supply system according to any one of claims 1-9.

13. A computer-readable storage medium, characterized in that, When the computer-executable instructions stored in the computer-readable storage medium are executed by the processor of the processing device, the processing device can execute the safety protection method of the vehicle power supply system according to any one of claims 1-9.

14. A computer program product, characterized in that, The computer program product includes the computer program, and the computer program is suitable for being loaded and executed by the processor to implement the safety protection method of the vehicle power supply system according to any one of claims 1-9.

Images