Vehicle power control method, electronic equipment and computer readable storage medium

Abstract

The invention discloses a vehicle power control method, electronic equipment and a computer readable storage medium. The method comprises the following steps: in response to a vehicle energy mode being a power priority mode, determining a first range extending power of a range extender under a preset audio limiting condition, a second range extending power of the range extender under a preset charging and discharging limiting condition and a to-be-extended range power generation power required by a vehicle according to obtained vehicle operation parameters; according to the first range extending power, the second range extending power and the to-be-extended range generating power, the initial range extending generating power of the range extender is determined; and carrying out attenuation processing on the initial range-extending power generation power according to the current under-voltage protection grade of the battery to obtain the target range-extending power generation power of the range extender. Therefore, the comfort of the vehicle is improved.

Description

Technical Field

[0001] The present invention relates to the field of vehicle control technology, and in particular to a vehicle power control method, electronic equipment and computer-readable storage medium. Background Art

[0002] With the development of new energy vehicles, it is becoming more and more common to use new energy as the power of vehicles. Among them, extended-range electric vehicles are vehicles that use batteries and range extenders to provide power. They combine the advantages of pure electric and internal combustion engines, which can not only increase the vehicle's cruising range, but also save energy and reduce emissions. At present, how to reasonably control the power generation of batteries and range extenders in extended-range electric vehicles is an important topic that needs to be studied in the field of vehicle control.

[0003] At present, the control method of extended-range electric vehicles is to control the power generation of the range extender based on the comparison result of the battery's SOC (State of Charge) and the preset charge threshold. However, this method only considers the charge pressure of the battery, and does not consider the noise and vibration caused by the start-up of the range extender, resulting in low vehicle comfort. Summary of the invention

[0004] The main technical problem solved by the present application is to provide a vehicle power control method, an electronic device and a computer-readable storage medium, which can improve vehicle comfort.

[0005] In order to solve the above technical problems, the present application provides a vehicle power control method.

[0006] In one embodiment, a vehicle power control method is applied to a vehicle, the vehicle including a range extender and a battery, the method including: in response to a vehicle energy mode being a power priority mode, determining a first range extender power of the range extender under a preset audio restriction condition, a second range extender power of the range extender under a preset charge and discharge restriction condition, and a range-extended power generation power required by the vehicle according to acquired vehicle operating parameters; determining an initial range-extended power generation power of the range extender according to the first range-extended power of the range extender under the preset audio restriction condition, the second range-extended power of the range extender under the preset charge and discharge restriction condition, and the range-extended power generation power required by the vehicle; and attenuating the initial range-extended power generation power according to a current undervoltage protection level of the battery to obtain a target range-extended power generation power of the range extender.

[0007] In one embodiment, the step of attenuating the initial extended-range power generation power according to the current undervoltage protection level of the battery to obtain the target extended-range power generation power of the range extender includes: determining a corresponding attenuation coefficient according to the current undervoltage protection level of the battery; and determining the product of the initial extended-range power generation power and the attenuation coefficient as the target extended-range power generation power of the range extender.

[0008] In one embodiment, the vehicle operating parameters include a vehicle operating speed, a vehicle pedal depth, charge data of the battery, an allowable discharge power of the battery, and temperature data of the battery; the step of determining a first range-extending power of the range extender under a preset audio restriction, a second range-extending power of the range extender under a preset charge and discharge restriction, and a range-extending power generation power required by the vehicle according to the acquired vehicle operating parameters includes: determining the first range-extending power of the range extender under the preset audio restriction according to the vehicle operating speed, the vehicle pedal depth, and the allowable discharge power of the battery; determining the second range-extending power of the range extender under the preset charge and discharge restriction according to the charge data of the battery and the temperature data of the battery; and determining the range-extending power generation power required by the vehicle according to the vehicle operating speed and the vehicle pedal depth.

[0009] In one embodiment, the step of determining the first extended-range power of the range extender under the preset audio restriction condition according to the vehicle running speed, the vehicle pedal depth and the allowable discharge power of the battery includes: determining a first limit power according to the vehicle running speed and the vehicle pedal depth; determining a second limit power from a first preset audio limit power mapping table according to the vehicle running speed, the preset audio limit power mapping table including a correspondence between the vehicle running speed and the limit power; determining a third limit power from a preset compensation power mapping table according to the allowable discharge power of the battery, the preset compensation power mapping table including a correspondence between the allowable discharge power and the compensation power; and determining the minimum value of the first limit power, the second limit power and the third limit power as the first extended-range power of the range extender under the preset audio restriction condition.

[0010] In one embodiment, the step of determining the first limit power according to the vehicle running speed and the vehicle pedal depth includes: obtaining a target audio limit power mapping table; determining an alternative limit power from the target audio limit power mapping table according to the vehicle running speed; determining a target incremental coefficient from a preset incremental coefficient table according to the vehicle pedal depth; and performing incremental processing on the alternative limit power according to the target incremental coefficient to obtain the first limit power.

[0011] In one embodiment, the step of obtaining a target audio limit power mapping table includes: obtaining a current altitude of the vehicle; determining a target result based on a first comparison result between the charge data of the battery and a first preset threshold, a second comparison result between the current altitude of the vehicle and a second preset threshold, and a third comparison result between the allowable discharge power of the battery and a third preset threshold, the target result including the first comparison result, the second comparison result, and the third comparison result; and determining the target audio limit power mapping table based on the target results.

[0012] In one embodiment, the step of determining the range-extended power generation power required by the vehicle according to the vehicle running speed and the vehicle pedal depth includes: determining the input torque in a preset torque mapping table according to the vehicle running speed and the vehicle pedal depth, the preset torque mapping table including the correspondence between the vehicle running speed and the vehicle pedal depth; and determining the sum of the power required by the range extender to output the input torque and the preset vehicle electrical equipment operating power as the range-extended power generation power required by the vehicle.

[0013] In one embodiment, after the step of attenuating the initial extended-range power generation power according to the current undervoltage protection level of the battery to obtain the target extended-range power generation power of the range extender, the method further includes: determining the sum of the available discharge power of the battery and the target extended-range power generation power as the alternative driving power of the vehicle; and determining the difference between the alternative driving power of the vehicle and a preset error threshold as the available driving power of the vehicle.

[0014] In order to solve the above technical problems, the present application provides an electronic device, including a memory and a processor, wherein the memory stores program instructions, and the processor retrieves the program instructions from the memory to execute the above vehicle power control method.

[0015] In order to solve the above technical problems, the present application provides a computer-readable storage medium, including: storing program data, and the program data is used to implement the above vehicle power control method when executed by a processor.

[0016] The beneficial effects of the present application are as follows: in response to the vehicle energy mode being the power priority mode, the first extended-range power of the range extender under the preset audio restriction condition, the second extended-range power of the range extender under the preset charge and discharge restriction condition, and the required extended-range power generation power of the vehicle are determined according to the acquired vehicle operating parameters; then the initial extended-range power generation power of the range extender is determined according to the first extended-range power, the second extended-range power, and the extended-range power generation power; then the initial extended-range power generation power is attenuated according to the current undervoltage protection level of the battery to obtain the target extended-range power generation power of the range extender. Thus, the initial extended-range power generation power of the range extender is determined under the audio restriction and the charge and discharge restriction, and then the initial extended-range power generation power is attenuated according to the current undervoltage protection level of the battery to obtain the target extended-range power generation power of the range extender, thereby limiting the audio generated by the noise and vibration of the start-up of the range extender and improving the comfort of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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 are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0018] Figure 1 is a flow chart of an exemplary embodiment of a vehicle power control method shown in the present application;

[0019] Figure 2 yes Figure 1 A flow chart of an exemplary embodiment of step S130 in the vehicle power control method is shown;

[0020] Figure 3 is a block diagram of a vehicle power control device shown in an exemplary embodiment of the present application;

[0021] Figure 4 It is a structural schematic diagram of an embodiment of an electronic device provided by the present application;

[0022] Figure 5 It is a structural schematic diagram of an embodiment of a computer-readable storage medium provided by the present application. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It will be appreciated that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only some but not all structures related to the present application are shown in the drawings. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the art without making creative work are within the scope of protection of the present application.

[0024] First of all, it should be noted that with the development of new energy vehicles, the use of new energy as the power of vehicles is becoming more and more common. Among them, extended-range electric vehicles are vehicles that use batteries and range extenders to provide power. They combine the advantages of pure electric and internal combustion engines, which can not only increase the vehicle's cruising range, but also save energy and reduce emissions. At present, how to reasonably control the power generation of batteries and range extenders in extended-range electric vehicles is an important topic that needs to be studied in the field of vehicle control.

[0025] At present, the control method of extended-range electric vehicles is to control the power generation of the range extender based on the comparison result of the battery's SOC (State of Charge) and the preset charge threshold. However, this method only considers the charge pressure of the battery, and does not consider the noise and vibration caused by the start-up of the range extender, resulting in low vehicle comfort.

[0026] Based on this, this embodiment provides a vehicle power control method, an electronic device, and a computer-readable storage medium. Figure 1 , Figure 1 It is a flow chart of an exemplary embodiment of a vehicle power control method shown in the present application.

[0027] The execution subject of a vehicle power control method may be a terminal device or a server or other processing device, wherein the terminal device may be a computer, a mobile device, a terminal, a computing device, a vehicle-mounted device, etc. The execution subject of the vehicle power control method may also be a vehicle power control device. In some possible implementations, the vehicle power control method may be implemented by a processor calling a computer-readable instruction stored in a memory.

[0028] A vehicle power control method is applied to a vehicle, the vehicle comprising a range extender and a battery. The range extender can generate electrical energy, and when the battery of the vehicle is insufficient, the range extender can charge the battery through an internal combustion engine or other energy sources, or supply the electrical energy to a motor through the battery.

[0029] Specifically, the vehicle power control method of this embodiment includes the following steps:

[0030] Step S110, in response to the vehicle energy mode being the power priority mode, determining a first range-extending power of the range extender under preset audio restriction conditions, a second range-extending power of the range extender under preset charge and discharge restriction conditions, and the required range-extending power generation required by the vehicle according to the acquired vehicle operating parameters.

[0031] Vehicle operating parameters refer to parameters collected during the operation of the vehicle. Vehicle operating parameters may also include vehicle operating speed, vehicle pedal depth, battery charge data, battery allowable discharge power and battery temperature data, etc. Vehicle operating parameters may also include the current altitude of the vehicle, and vehicle operating parameters may also include compressor power, heating equipment power, converter actual input voltage, converter actual input current, etc. Specifically, the vehicle power control device may collect vehicle operating parameters through sensors, wherein the sensors may include speed sensors, position sensors, state of charge (SOC) sensors, voltage sensors, current sensors and temperature sensors, etc. The vehicle power control device may also determine the received parameters as vehicle operating parameters by receiving parameters sent by the vehicle control unit (VCU, Vehicle Control Unit) of the vehicle. Among them, the electronic control unit is the processing center of the vehicle, which is used to process and store data from various sensors and actuators in the vehicle.

[0032] The vehicle energy mode refers to the mode in which the vehicle uses different types of energy to drive its operation. The vehicle energy mode can be selected by the vehicle control unit (VCU). The vehicle energy mode can be a power priority mode, which means that the vehicle uses the range extender to provide power first; the vehicle energy mode can also be a hybrid mode, which means that the vehicle uses both the range extender and the battery to provide power.

[0033] Specifically, the vehicle power control device obtains vehicle operating parameters, including multimedia energy mode, vehicle acceleration state, battery management system (BMS) fault level, range-extending system fault level, battery pre-undervoltage level, battery allowable charging power and battery allowable discharging power; in response to the multimedia energy mode being the power priority mode, the vehicle acceleration state being the non-accelerated state, the BMS battery management system fault level indicating no serious fault, the range-extending system fault level indicating no serious fault, and the battery pre-undervoltage level being the preset level, the vehicle energy mode is controlled according to the battery allowable charging power and battery allowable discharging power. Among them, the multimedia energy mode refers to the configuration mode of energy management and optimization in the vehicle ICU (Instrument Cluster Unit), and the multimedia energy mode may include power priority mode, transportation mode, etc.

[0034] Among them, the vehicle power control device controls the vehicle energy mode according to the allowable charging power and the allowable discharging power of the battery. Specifically, in response to the allowable charging power of the battery being greater than or equal to the first preset power, and the sum of the allowable charging power of the battery and the allowable discharging power of the battery being greater than or equal to the second preset power, the vehicle power control device determines whether the allowable charging power of the battery is less than the third preset power, and obtains a judgment result; in response to the judgment result indicating that the allowable charging power of the battery is less than the third preset power, the vehicle is controlled to be in power priority mode; in response to the judgment result indicating that the allowable charging power of the battery is greater than or equal to the third preset power, the vehicle is not controlled. Thus, by controlling the vehicle energy mode, the vehicle can be controlled to optimally allocate energy resources under different working conditions, reducing unnecessary energy consumption and power generation. Among them, the third preset power is greater than the first preset power. The allowable charging power of the battery can be the maximum charging power allowed by the battery, and the allowable discharging power of the battery can be the maximum discharging power allowed by the battery.

[0035] In one embodiment, the vehicle power control device performs a mode switching reminder operation in response to a judgment result indicating that the allowable charging power of the battery is less than a third preset power; in response to the vehicle energy mode being in the power priority mode, the allowable charging power of the battery is greater than or equal to the third preset power, or the mode switching reminder is eliminated within the first preset time period after the mode switching reminder operation. The mode switching reminder operation may be to send a preset reminder message to the vehicle dashboard and trigger an indicator light on the vehicle dashboard to light up. For example, the preset reminder message may be "The battery discharge capacity is weak, the peak power output is limited, and it is recommended to switch to the power priority mode", and the indicator light on the vehicle dashboard may be a Ready time meter. The first preset time period may be 10 seconds.

[0036] Further, in response to the allowable charging power of the battery being less than the first preset power, or the sum of the allowable charging power of the battery and the allowable discharging power of the battery being less than the second preset power, the vehicle power control device controls the vehicle to exit the power priority mode; and continues to obtain the allowable charging power and the allowable discharging power of the battery until the allowable charging power of the battery is greater than or equal to the first preset power and the sum of the allowable charging power of the battery and the allowable discharging power of the battery is greater than or equal to the second preset power within the second preset time period, then controls the vehicle to enter the power priority mode. The second preset time period may be 5 seconds.

[0037] The first extended-range power refers to the allowable power generation of the range extender under the preset audio restriction condition. The first extended-range power may be the maximum power generation of the range extender under the preset audio restriction condition. The preset audio restriction condition refers to the condition that meets the NVH (Noise Vibration Harshness) standard performance.

[0038] The second extended-range power refers to the allowable discharge power of the range extender under the preset charge and discharge limit conditions. The second extended-range power may be the maximum discharge power of the range extender under the preset charge and discharge limit conditions. The preset charge and discharge limit conditions refer to the conditions that meet the battery charging and discharging performance.

[0039] The range-extended power generation refers to the power generation required by the vehicle. Specifically, the vehicle power control device receives the input power and determines the input power as the range-extended power generation.

[0040] The vehicle power control device determines the first extended-range power of the range extender under the preset audio restriction condition, the second extended-range power of the range extender under the preset charge and discharge restriction condition, and the required extended-range power generation power of the vehicle according to the acquired vehicle operating parameters. Specifically, the vehicle power control device determines the first extended-range power from a preset first extended-range power mapping table, which includes the corresponding relationship between the vehicle operating parameters and the first extended-range power; the vehicle power control device determines the second extended-range power from a preset second extended-range power mapping table, which includes the corresponding relationship between the vehicle operating parameters and the second extended-range power; the vehicle power control device determines the to-be-extended-range power generation power from a preset third extended-range power mapping table, which includes the corresponding relationship between the vehicle operating parameters and the to-be-extended-range power generation power.

[0041] Step S120, determining the initial extended-range power of the range extender according to the first extended-range power of the range extender under the preset audio restriction condition, the second extended-range power of the range extender under the preset charge and discharge restriction condition, and the required extended-range power generation power of the vehicle.

[0042] The initial extended-range power generation power refers to the power generation power of the range extender under the preset audio limit conditions, the preset charge and discharge limit conditions and the power limit required by the vehicle.

[0043] As an example, the vehicle power control device determines the minimum value of the first extended-range power of the range extender under the preset audio restriction condition, the second extended-range power of the range extender under the preset charge and discharge restriction condition, and the required extended-range power generation power of the vehicle as the initial extended-range power generation power of the range extender. As another example, the vehicle power control device obtains the average value of the first extended-range power of the range extender under the preset audio restriction condition, the second extended-range power of the range extender under the preset charge and discharge restriction condition, and the required extended-range power generation power of the vehicle, and determines the average value as the initial extended-range power generation power of the range extender.

[0044] Step S130: attenuate the initial extended-range power generation power according to the current undervoltage protection level of the battery to obtain the target extended-range power generation power of the range extender.

[0045] The current undervoltage protection level refers to the current protection level for the battery voltage. The current undervoltage protection level can be level 1, level 2, level 3 or level 4.

[0046] Attenuation processing refers to the process of reducing the initial extended-range power generation power.

[0047] The target extended-range power generation refers to the power generation that the range extender actually needs to output.

[0048] The vehicle power control device attenuates the initial extended-range power generation according to the current undervoltage protection level of the battery to obtain the target extended-range power generation of the range extender. Specifically, the vehicle power device determines the target attenuation value from a preset attenuation value mapping table according to the current undervoltage protection level of the battery, and determines the difference between the initial extended-range power generation and the target attenuation value as the target extended-range power generation of the range extender.

[0049] It can be seen that in response to the vehicle energy mode being the power priority mode, the first extended-range power of the range extender under the preset audio restriction condition, the second extended-range power of the range extender under the preset charge and discharge restriction condition, and the required extended-range power generation power of the vehicle are determined according to the acquired vehicle operating parameters; then the initial extended-range power generation power of the range extender is determined according to the first extended-range power, the second extended-range power, and the extended-range power generation power; then the initial extended-range power generation power is attenuated according to the current undervoltage protection level of the battery to obtain the target extended-range power generation power of the range extender. Thus, the initial extended-range power generation power of the range extender is determined under the audio restriction and the charge and discharge restriction, and then the initial extended-range power generation power is attenuated according to the current undervoltage protection level of the battery to obtain the target extended-range power generation power of the range extender, thereby limiting the audio generated by the noise and vibration of the range extender startup and improving the comfort of the vehicle.

[0050] Based on the above examples, please refer to Figure 2 , Figure 2 yes Figure 1The flowchart of an exemplary embodiment of step S130 in the vehicle power control method is shown. Specifically, in step S130, the initial extended-range power generation is attenuated according to the current undervoltage protection level of the battery, and the target extended-range power generation of the range extender is obtained, and the following steps are also included:

[0051] Step S210: determining the current undervoltage protection level of the battery according to the magnitude of the current pre-undervoltage signal of the battery.

[0052] The current pre-undervoltage signal refers to a voltage reduction power signal sent by the battery management system when the minimum cell voltage value of the battery pack is lower than a preset pre-undervoltage threshold.

[0053] The vehicle power control device determines the current undervoltage protection level of the battery according to the size of the current pre-undervoltage signal of the battery. Specifically, the vehicle power control device determines the current undervoltage protection level from a preset undervoltage protection level mapping table according to the size of the current pre-undervoltage signal of the battery, and the undervoltage protection level mapping table includes the correspondence between the pre-undervoltage signal and the undervoltage protection level. For example, in response to the current pre-undervoltage signal of the battery being 0 or the communication being lost, the vehicle power control device determines that the current undervoltage protection level of the battery is level one; in response to the current pre-undervoltage signal of the battery being 1, the vehicle power control device determines that the current undervoltage protection level of the battery is level two; in response to the current pre-undervoltage signal of the battery being 2, the vehicle power control device determines that the current undervoltage protection level of the battery is level three; in response to the current pre-undervoltage signal of the battery being 3, the vehicle power control device determines that the current undervoltage protection level of the battery is level four.

[0054] Please continue reading Figure 2 Step S130 performs attenuation processing on the initial extended-range power generation according to the current undervoltage protection level of the battery to obtain the target extended-range power generation of the range extender, including the following steps:

[0055] Step S220: determining a corresponding attenuation coefficient according to the current undervoltage protection level of the battery.

[0056] The attenuation coefficient refers to the value used to attenuate the power generated by the range extender.

[0057] The vehicle power control device determines the corresponding attenuation coefficient according to the current undervoltage protection level of the battery. Specifically, the vehicle power control device determines the attenuation coefficient from a preset attenuation coefficient mapping table according to the current undervoltage protection level of the battery, and the attenuation coefficient mapping table includes the corresponding relationship between the undervoltage protection level and the attenuation coefficient. For example, the vehicle power control device responds to the current undervoltage protection level of the battery being level 1, and the corresponding attenuation coefficient is ε1.

[0058] Step S230: determining the product of the initial extended-range power generation power and the attenuation coefficient as the target extended-range power generation power of the range extender.

[0059] The vehicle power control device determines the product of the initial extended-range power generation and the attenuation coefficient as the target extended-range power generation of the range extender. For example, the target extended-range power generation=initial extended-range power generation×attenuation coefficient.

[0060] The vehicle power control method further includes: in response to the undervoltage protection level of the battery at the last moment being a high level and the undervoltage protection level at the current moment being a low level, the current undervoltage protection level is determined as a high level within a third preset time period, and the last moment is before the current moment. The high level may be level three or level four, and the low level may be level one or level two. It should be noted that the battery undervoltage protection level increases or decreases step by step.

[0061] The vehicle power control method also includes: counting the number of times that the current pre-undervoltage signal is a preset signal value, and in response to the statistical number being greater than the preset statistical threshold, determining that the target extended-range power generation power of the range extender within the fourth preset time period is a preset power threshold. For example, if the current pre-undervoltage signal is 3 and the statistical number is greater than C1 times, then the target extended-range power generation power of the range extender within time T1 is determined to be C2. It should be noted that after determining that the target extended-range power generation power is the preset power threshold, the step of obtaining the target extended-range power generation power of the range extender is re-executed after the battery is powered on again.

[0062] It can be seen that the current undervoltage protection level of the battery is determined according to the size of the current pre-undervoltage signal of the battery, the corresponding attenuation coefficient is determined according to the current undervoltage protection level of the battery, and the product of the initial extended-range power generation and the attenuation coefficient is determined as the target extended-range power generation of the range extender. In this way, the attenuation of the initial extended-range power generation according to the undervoltage protection level of the battery is realized to avoid excessive power of the range extender to damage the battery.

[0063] In one embodiment, the vehicle operating parameters include the vehicle operating speed, the vehicle pedal depth, the charge data of the battery, the allowable discharge power of the battery and the temperature data of the battery. The temperature data of the battery may be the lowest cell temperature of the battery. The step of the vehicle power control device determining the first range-extending power of the range extender under the preset audio restriction condition, the second range-extending power of the range extender under the preset charge and discharge restriction condition and the required range-extending power generation power of the vehicle according to the acquired vehicle operating parameters includes: determining the first range-extending power of the range extender under the preset audio restriction condition according to the vehicle operating speed, the vehicle pedal depth and the allowable discharge power of the battery; determining the second range-extending power of the range extender under the preset charge and discharge restriction condition according to the charge data of the battery and the temperature data of the battery; determining the required range-extending power generation power of the vehicle according to the vehicle operating speed and the vehicle pedal depth.

[0064] Among them, the step of the vehicle power control device determining the first extended-range power of the range extender under the preset audio restriction condition according to the vehicle running speed, the vehicle pedal depth and the allowable discharge power of the battery includes: determining the first limited power according to the vehicle running speed and the vehicle pedal depth; determining the second limited power from the first preset audio limited power mapping table according to the vehicle running speed, the preset audio limited power mapping table including the correspondence between the vehicle running speed and the limited power; determining the third limited power from the preset compensation power mapping table according to the allowable discharge power of the battery, the preset compensation power mapping table including the correspondence between the allowable discharge power and the compensation power; and determining the minimum value of the first limited power, the second limited power and the third limited power as the first extended-range power of the range extender under the preset audio restriction condition.

[0065] In one embodiment, the first preset audio limit power mapping table is a correspondence between the vehicle running speed and the limit power under the limitation of the NVH maximum limit line 5 . For example, Table 1 is an example table of the first preset audio limit power mapping table. As shown in Table 1, the vehicle speed is the vehicle running speed. When the vehicle speed is 0 km / h, the limit power corresponding to the vehicle speed is K1; when the vehicle speed is 5 km / h, the limit power corresponding to the vehicle speed is K2; when the vehicle speed is 10 km / h, the limit power corresponding to the vehicle speed is K3; when the vehicle speed is 15 km / h, the limit power corresponding to the vehicle speed is K4; when the vehicle speed is 20 km / h, the limit power corresponding to the vehicle speed is K5; when the vehicle speed is 25 km / h, the limit power corresponding to the vehicle speed is K6; when the vehicle speed is 30 km / h, the limit power corresponding to the vehicle speed is K7; when the vehicle speed is 35 km / h, the limit power corresponding to the vehicle speed is K8; when the vehicle speed is 40 km / h, the limit power corresponding to the vehicle speed is K9; when the vehicle speed is 175 km / h, the limit power corresponding to the vehicle speed is K36; when the vehicle speed is 180 km / h, the limit power corresponding to the vehicle speed is K37.

[0066] Vehicle speed (km / h) 0 5 10 15 20 25 30 35 Limit power(kw) K1 K2 K3 K4 K5 K6 K7 K8 Vehicle speed (km / h) 40 45 50 55 60 65 70 75 Limit power(kw) K9 K10 K11 K12 K13 K14 K15 K16 Vehicle speed (km / h) 80 85 90 95 100 105 110 115 Limit power(kw) K17 K18 K19 K20 K21 K22 K23 K24 Vehicle speed (km / h) 120 125 130 135 140 145 150 155 Limit power(kw) K25 K26 K27 K28 K29 K30 K31 K32 Vehicle speed (km / h) 160 165 170 175 180 / / / Limit power(kw) K33 K34 K35 K36 K37 / / /

[0067] Table 1

[0068] In one embodiment, the preset compensation power mapping table is the correspondence between the allowable discharge power of the battery and the compensation power of the range extender at normal temperature. The allowable discharge power may be the maximum discharge power allowed by the battery, and the compensation power may be the maximum compensation power allowed by the range extender. For example, Table 2 is an example table of the compensation power mapping table. As shown in Table 2, the maximum discharge power is 10KW, and the corresponding maximum compensation power is M1; the maximum discharge power is 95KW, and the corresponding maximum compensation power is M18; the maximum discharge power is 180KW, and the corresponding maximum compensation power is M35.

[0069] Maximum discharge power(KW) 10 15 20 25 30 35 40 Maximum compensation power(KW) M1 M2 M3 M4 M5 M6 M7 Maximum discharge power(KW) 45 50 55 60 65 70 75 Maximum compensation power(KW) M8 M9 M10 M11 M12 M13 M14 Maximum discharge power (KW) 80 85 90 95 100 105 110 Maximum compensation power(KW) M15 M16 M17 M18 M19 M20 M21 Maximum discharge power(KW) 115 120 125 130 135 140 145 Maximum compensation power(KW) M22 M23 M24 M25 M26 M27 M28 Maximum discharge power(KW) 150 155 160 165 170 175 180 Maximum compensation power(KW) M29 M30 M31 M32 M33 M34 M35

[0070] Table 2

[0071] The vehicle power control device determines the first limited power according to the vehicle running speed and the vehicle pedal depth. Specifically, the vehicle power control device obtains a target audio limited power mapping table; determines an alternative limited power from the target audio limited power mapping table according to the vehicle running speed; determines a target incremental coefficient from a preset incremental coefficient table according to the vehicle pedal depth; performs incremental processing on the alternative limited power according to the target incremental coefficient to obtain the first limited power. Thus, the alternative limited power is incrementally processed according to the vehicle pedal depth, ensuring that the engine speed does not change drastically when the vehicle pedal depth is low, and ensuring power followability when the vehicle pedal depth is high.

[0072] It should be noted that the target audio limit power mapping table includes the correspondence between vehicle running speed and limit power. The target audio limit mapping table and the preset audio limit power mapping table have the same correspondence between vehicle running speed and limit power, but the corresponding values ​​of vehicle running speed and limit power are different.

[0073] The vehicle power control device determines the target incremental coefficient from a preset incremental coefficient table according to the vehicle pedal depth. As an example, the vehicle power control device matches the corresponding incremental coefficient from the preset incremental coefficient table according to the vehicle pedal depth, and determines the matched incremental coefficient as the target incremental coefficient. As another example, the vehicle power control device matches the corresponding incremental coefficient from the preset incremental coefficient table according to the vehicle pedal depth; selects the maximum value between the vehicle pedal depth and the preset pedal depth threshold; obtains the first product term of the maximum value and the matched incremental coefficient, and determines the sum of the first product term and the preset incremental threshold as the target incremental coefficient. For example, the target incremental coefficient satisfies the following formula:

[0074] δ={[max(Y%,α%)-α%]*X}+Z

[0075] Wherein, δ represents the target increment coefficient, Y% represents the percentage coefficient of the vehicle pedal depth, α% represents the percentage coefficient of the preset pedal depth threshold, X represents the matching increment coefficient, and Z represents the preset increment threshold.

[0076] In one embodiment, the percentage coefficient of the preset pedal depth threshold may be 30%, the preset increment threshold may be 1, and the target increment coefficient δ={[max(Y%, 30%)-30%]*X}+1.

[0077] In one embodiment, the preset incremental coefficient table includes the correspondence between the vehicle pedal depth and the incremental coefficient. For example, Table 3 is an example table of the preset incremental coefficient table. As shown in Table 3, the vehicle pedal depth is 0%, and the corresponding incremental coefficient is X1; the vehicle pedal depth is 50%, and the corresponding incremental coefficient is X6; the vehicle pedal depth is 100%, and the corresponding incremental coefficient is X11.

[0078] Vehicle pedal depth 0％ 10％ 20％ 30％ 40％ 50％ Incremental factor X1 X2 X3 X4 X5 X6 Vehicle pedal depth 60％ 70％ 80％ 90％ 100％ / Incremental factor X7 X8 X9 X10 X11 /

[0079] Table 3

[0080] The vehicle power control device performs an incremental process on the alternative limit power according to the target incremental coefficient to obtain a first limit power. Specifically, the vehicle power control device determines the product of the target incremental coefficient and the alternative limit power as the first limit power. For example, e=a*δ, where e represents the first limit power, a represents the alternative limit power, and δ represents the target incremental coefficient.

[0081] The vehicle power control device obtains a target audio limiting power mapping table. Specifically, the vehicle power control device obtains the current altitude of the vehicle; determines a target result based on a first comparison result between the battery charge data and a first preset threshold, a second comparison result between the current altitude of the vehicle and a second preset threshold, and a third comparison result between the battery's allowable discharge power and a third preset threshold, wherein the target result includes the first comparison result, the second comparison result, and the third comparison result; and determines a target audio limiting power mapping table based on the target result.

[0082] The vehicle power control device determines the target audio limiting power mapping table according to the target result. Specifically, in response to the comparison result indicating that the battery charge data is greater than the first preset threshold, the preset altitude of the vehicle is less than or equal to the second preset threshold, and the maximum discharge power of the battery is greater than or equal to the third preset threshold, the vehicle power control device determines the second preset audio limiting power mapping table as the target audio limiting power mapping table; in response to the comparison result indicating that the battery charge data is less than or equal to the first preset threshold, the preset altitude of the vehicle is greater than the second preset threshold, or the maximum discharge power of the battery is less than the third preset threshold, the vehicle power control device determines the third preset audio limiting power mapping table as the target audio limiting power mapping table.

[0083] In one embodiment, the second preset audio limited power mapping table is a correspondence between the vehicle running speed and the limited power under the limitation of the NVH maximum limit line 0. For example, Table 4 is an example table of the second preset audio limited power mapping table. As shown in Table 4, the vehicle speed is the vehicle running speed. The vehicle speed is 5 km / h, and the corresponding limited power is A2; the vehicle speed is 85 km / h, and the corresponding limited power is A18; the vehicle speed is 175 km / h, and the corresponding limited power is A36; the vehicle speed is 180 km / h, and the corresponding limited power is A37.

[0084] Vehicle speed (km / h) 0 5 10 15 20 25 30 35 Limit power(kw) A1 A2 A3 A4 A5 A6 A7 A8 Vehicle speed (km / h) 40 45 50 55 60 65 70 75 Limit power(kw) A9 A10 A11 A12 A13 A14 A15 A16 Vehicle speed (km / h) 80 85 90 95 100 105 110 115 Limit power(kw) A17 A18 A19 A20 A21 A22 A23 A24 Vehicle speed (km / h) 120 125 130 135 140 145 150 155 Limit power(kw) A25 A26 A27 A28 A29 A30 A31 A32 Vehicle speed (km / h) 160 165 170 175 180 / / / Limit power(kw) A33 A34 A35 A36 A37 / / /

[0085] Table 4

[0086] In one embodiment, the third preset audio limited power mapping table is a correspondence between the vehicle running speed and the limited power under the limitation of the NVH maximum limit line 4. For example, Table 5 is an example table of the third preset audio limited power mapping table. As shown in Table 5, the vehicle speed is the vehicle running speed. The vehicle speed is 5 km / h, and the corresponding limited power is J2; the vehicle speed is 85 km / h, and the corresponding limited power is J18; the vehicle speed is 180 km / h, and the corresponding limited power is J37.

[0087] Vehicle speed (km / h) 0 5 10 15 20 25 30 35 Limit power(kw) J1 J2 J3 J4 J5 J6 J7 J8 Vehicle speed (km / h) 40 45 50 55 60 65 70 75 Limit power(kw) J9 J10 J11 J12 J13 J14 J15 J16 Vehicle speed (km / h) 80 85 90 95 100 105 110 115 Limit power(kw) J17 J18 J19 J20 J21 J22 J23 J24 Vehicle speed (km / h) 120 125 130 135 140 145 150 155 Limit power(kw) J25 J26 J27 J28 J29 J30 J31 J32 Vehicle speed (km / h) 160 165 170 175 180 / / / Limit power(kw) J33 J34 J35 J36 J37 / / /

[0088] Table 5

[0089] The vehicle power control device determines the minimum value among the first limit power, the second limit power and the third limit power as the first extended-range power of the range extender under the preset audio limit condition. For example, N1=min[e, k, m], where N1 represents the first extended-range power, e represents the first limit power, k represents the second limit power, and m represents the third limit power.

[0090] The vehicle power control device determines the second extended-range power of the range extender under the preset charge and discharge limit conditions according to the charge data of the battery and the temperature data of the battery. Specifically, the vehicle power control device determines the second extended-range power from a preset power mapping table under charge and discharge limit according to the charge data of the battery and the temperature data of the battery. Thus, the second extended-range power is determined by the power mapping table under charge and discharge limit, thereby determining the appropriate second extended-range power of the range extender according to the actual charge and discharge capacity of the battery, thereby preventing the battery from being overcharged or over-discharged.

[0091] The charge data of the battery is the state of charge value of the battery, and the temperature data of the battery is the lowest cell temperature of the battery. The preset power mapping table under charge and discharge restrictions includes the correspondence between charge data, temperature data and discharge power. For example, Table 6 and Table 7 are example tables of power mapping tables under charge and discharge restrictions. As shown in Table 6 and Table 7, the temperature data is 0, the charge data is -35, and the corresponding discharge power is D1; ​​the temperature data is 60, the charge data is -35, and the corresponding discharge power is D7; the temperature data is 80, the charge data is -25, and the corresponding discharge power is D48.

[0092]

[0093] Table 6

[0094]

[0095] Table 7

[0096] The vehicle power control device determines the range-extended power generation power required by the vehicle according to the vehicle running speed and the vehicle pedal depth. Specifically, the input torque is determined in a preset torque mapping table according to the vehicle running speed and the vehicle pedal depth, and the preset torque mapping table includes the corresponding relationship between the vehicle running speed and the vehicle pedal depth; the sum of the power required by the range extender to output the input torque and the preset vehicle electrical equipment operating power is determined as the range-extended power generation power required by the vehicle.

[0097] Before the vehicle power control device determines the sum of the power required for the range extender to output the input torque and the preset vehicle electrical equipment operating power as the required power generation power for the vehicle to be extended, the device also includes: obtaining a second product term of the input torque and the actual speed of the rear drive motor; obtaining a first ratio of the second product term to the efficiency of the rear drive motor; and determining the power required for the range extender to output the input torque by a second ratio between the first ratio after unit conversion and the battery efficiency.

[0098] In one embodiment, the power required for the range extender to output the input torque satisfies the following formula:

[0099] p 输出 =L 输入 ×V 后驱动 / b / R 后驱动 / R 电池

[0100] Among them, p 输出 Characterizes the power required for the range extender to output the input torque; L 输入 Characterizes input torque, V 后驱动Indicates the actual speed of the rear drive motor. The actual speed of the rear drive motor can be RMCU (Regional Microcontroller Unit) The actual speed of the rear drive motor, the rear drive motor refers to the rear wheel drive motor of the vehicle; b represents the unit conversion coefficient, b can be 9550; R 后驱动 Characterizes the efficiency of the rear drive motor, the efficiency of the rear drive motor is obtained according to the input voltage of the motor, for example, the corresponding rear drive motor efficiency is determined from a preset motor efficiency mapping table according to the input voltage, and the preset motor efficiency mapping table includes the corresponding relationship between the input voltage and the rear drive motor efficiency; R 电池 Characterize the battery efficiency, for example, battery efficiency = (battery charging energy / battery discharging energy) × 100%.

[0101] Before the vehicle power control device determines the sum of the power required for the range extender to output the input torque and the preset vehicle electrical equipment operating power as the vehicle required power generation power to be extended, the method also includes: respectively obtaining the compressor power, the heating device power and the converter power; and determining the sum of the compressor power, the heating device power and the converter power as the preset vehicle electrical equipment operating power.

[0102] The compressor power may be a CCM (Compressor Control Module) compressor power. For example, the vehicle power control device may output the compressor power through the CCM. The heating device power may be a PTC (Positive Temperature Coefficient) heating component power. The converter power may be a DC-DC (DC-to-DC converter) converter power. For example, the vehicle power control device may determine the converter power as the product of the actual converter input voltage and the actual converter input current.

[0103] After the vehicle power control device performs attenuation processing on the initial extended-range power generation power according to the current undervoltage protection level of the battery to obtain the target extended-range power generation power of the range extender, the vehicle power control device also includes: determining the sum of the available discharge power of the battery and the target extended-range power generation power as the alternative driving power of the vehicle; and determining the difference between the alternative driving power of the vehicle and a preset error threshold as the available driving power of the vehicle.

[0104] The vehicle power control device determines the sum of the compressor power, the heating device power and the converter power as the first value; and determines the difference between the allowable discharge power of the battery and the first value as the available discharge power of the battery. For example, the available discharge power of the battery = the allowable discharge power of the battery - [compressor power + heating device power + converter power], and the converter power = the actual input voltage of the converter * the actual input current of the converter.

[0105] Figure 3 FIG. 1 is a block diagram of a vehicle power control device according to an exemplary embodiment of the present application. Figure 3 As shown, the exemplary vehicle power control device 300 includes: an acquisition module 310, a power limiting module 320 and a power attenuation module 330. Specifically:

[0106] The acquisition module 310 is used to determine, in response to the vehicle energy mode being the power priority mode, a first extended-range power of the range extender under a preset audio restriction condition, a second extended-range power of the range extender under a preset charge and discharge restriction condition, and the required extended-range power generation power of the vehicle according to the acquired vehicle operating parameters.

[0107] The power limiting module 320 is used to determine the initial extended-range power of the range extender according to the first extended-range power of the range extender under the preset audio limiting condition, the second extended-range power of the range extender under the preset charging and discharging limiting condition, and the required extended-range power generation power of the vehicle.

[0108] The power attenuation module 330 is used to attenuate the initial extended-range power generation power according to the current undervoltage protection level of the battery to obtain the target extended-range power generation power of the range extender.

[0109] In this exemplary vehicle power control device, in response to the vehicle energy mode being the power priority mode, the first extended-range power of the range extender under the preset audio restriction condition, the second extended-range power of the range extender under the preset charge and discharge restriction condition, and the required extended-range power generation power of the vehicle are determined according to the acquired vehicle operating parameters; then the initial extended-range power generation power of the range extender is determined according to the first extended-range power, the second extended-range power, and the extended-range power generation power; then the initial extended-range power generation power is attenuated according to the current undervoltage protection level of the battery to obtain the target extended-range power generation power of the range extender. Thus, the initial extended-range power generation power of the range extender is determined under the audio restriction and the charge and discharge restriction, and then the initial extended-range power generation power is attenuated according to the current undervoltage protection level of the battery to obtain the target extended-range power generation power of the range extender, so that the audio generated by the noise and vibration of the start-up of the range extender can be limited, and the comfort of the vehicle can be improved.

[0110] The functions of each module can be found in the vehicle power control method embodiment, which will not be described in detail here.

[0111] In order to implement the vehicle power control method of the above embodiment, the present application proposes another electronic device, for details, please refer to Figure 4 , Figure 4 It is a structural schematic diagram of an embodiment of an electronic device provided by the present application.

[0112] The electronic device 400 includes a memory 401 and a processor 402 , wherein the memory 401 and the processor 402 are coupled.

[0113] The memory 401 is used to store program data, and the processor 402 is used to execute the program data to implement the vehicle power control method of the above embodiment.

[0114] In this embodiment, the processor 402 may also be referred to as a CPU (Central Processing Unit). The processor 402 may be an integrated circuit chip having signal processing capabilities. The processor 402 may also be a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component. A general-purpose processor may be a microprocessor or the processor 402 may also be any conventional processor, etc.

[0115] The present application also provides a computer-readable storage medium, such as Figure 5 As shown, the computer-readable storage medium 500 is used to store program data 501. When the program data 501 is executed by the processor, it is used to implement the vehicle power control method in the method embodiment of the present application.

[0116] The method involved in the embodiment of the vehicle power control method of the present application, when implemented in the form of a software functional unit and sold or used as an independent product, can be stored in a device, such as a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially 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, and the computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor (processor) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0117] The above description is only an implementation method of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A vehicle power control method, characterized in that: The vehicle power control method is applied to a vehicle, the vehicle comprising a range extender and a battery, and the method comprises: In response to the vehicle energy mode being the power priority mode, determining, according to the acquired vehicle operating parameters, a first range-extending power of the range extender under a preset audio restriction condition, a second range-extending power of the range extender under a preset charge and discharge restriction condition, and a required range-extending power generation power of the vehicle; Determine the initial extended-range power generation power of the range extender according to the first extended-range power of the range extender under the preset audio restriction condition, the second extended-range power of the range extender under the preset charge and discharge restriction condition, and the required extended-range power generation power of the vehicle; The initial extended-range power generation power is attenuated according to the current undervoltage protection level of the battery to obtain the target extended-range power generation power of the range extender.

2. The method according to claim 1, characterized in that The step of performing attenuation processing on the initial extended-range power generation power according to the current undervoltage protection level of the battery to obtain the target extended-range power generation power of the range extender comprises: Determining a corresponding attenuation coefficient according to a current undervoltage protection level of the battery; The product of the initial extended-range power generation power and the attenuation coefficient is determined as the target extended-range power generation power of the range extender.

3. The method according to claim 1, characterized in that The vehicle operation parameters include vehicle operation speed, vehicle pedal depth, charge data of the battery, allowable discharge power of the battery and temperature data of the battery; The step of determining, according to the acquired vehicle operating parameters, a first range-extending power of the range extender under a preset audio restriction condition, a second range-extending power of the range extender under a preset charge and discharge restriction condition, and the range-extending power generation power required by the vehicle comprises: determining a first extended-range power of the range extender under the preset audio restriction condition according to the vehicle running speed, the vehicle pedal depth and the allowable discharge power of the battery; determining a second extended-range power of the range extender under the preset charge and discharge restriction conditions according to the charge data of the battery and the temperature data of the battery; The range-extended power generation power required by the vehicle is determined according to the vehicle running speed and the vehicle pedal depth.

4. The method according to claim 3, characterized in that The step of determining the first extended-range power of the range extender under the preset audio restriction condition according to the vehicle running speed, the vehicle pedal depth and the allowable discharge power of the battery comprises: Determining a first limited power according to the vehicle running speed and the vehicle pedal depth; Determining a second limited power from a first preset audio limited power mapping table according to the vehicle running speed, wherein the preset audio limited power mapping table includes a correspondence between the vehicle running speed and the limited power; Determine a third limit power from a preset compensation power mapping table according to the allowable discharge power of the battery, wherein the preset compensation power mapping table includes a correspondence between the allowable discharge power and the compensation power; A minimum value among the first limit power, the second limit power and the third limit power is determined as a first extended-range power of the range extender under the preset audio limit condition.

5. The method according to claim 4, characterized in that The step of determining the first limited power according to the vehicle running speed and the vehicle pedal depth comprises: Get the target audio limit power mapping table; determining an alternative limit power from the target audio limit power mapping table according to the vehicle running speed; Determining a target incremental coefficient from a preset incremental coefficient table according to the vehicle pedal depth; The candidate limit power is incremented according to the target increment coefficient to obtain a first limit power.

6. The method according to claim 5, characterized in that The step of obtaining the target audio limit power mapping table comprises: Get the current altitude of the vehicle; Determine a target result according to a first comparison result between the charge data of the battery and a first preset threshold, a second comparison result between the current altitude of the vehicle and a second preset threshold, and a third comparison result between the allowable discharge power of the battery and a third preset threshold, wherein the target result includes the first comparison result, the second comparison result, and the third comparison result; The target audio limiting power mapping table is determined according to the target result.

7. The method according to claim 3, characterized in that The step of determining the range-extended power generation power required by the vehicle according to the vehicle running speed and the vehicle pedal depth comprises: Determining an input torque in a preset torque mapping table according to the vehicle running speed and the vehicle pedal depth, wherein the preset torque mapping table includes a corresponding relationship between the vehicle running speed and the vehicle pedal depth; The sum of the power required by the range extender to output the input torque and the preset operating power of the vehicle electrical equipment is determined as the required range-extended generated power of the vehicle.

8. The method according to claim 1, characterized in that After the step of performing attenuation processing on the initial extended-range power generation power according to the current undervoltage protection level of the battery to obtain the target extended-range power generation power of the range extender, the method further includes: determining a sum of the available discharge power of the battery and the target extended-range power generation power as an alternative driving power of the vehicle; A difference between the candidate driving power of the vehicle and a preset error threshold is determined as the driving available power of the vehicle.

9. An electronic device, characterized in that: include: A memory and a processor, wherein the memory stores program instructions, and the processor retrieves the program instructions from the memory to execute the method according to any one of claims 1 to 8.

10. A computer-readable storage medium, characterized in that: include: Program data is stored, and when the program data is executed by a processor, it is used to implement the method according to any one of claims 1 to 8.

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