Power control method and system of vehicle and vehicle

Abstract

The embodiment of the invention provides a power control method and system of a vehicle and the vehicle. The power control method of the vehicle comprises the steps that the power range of a battery is obtained, and the available power range used for driving a motor is determined according to the power range; distributing an available power range into a first power range corresponding to a first motor and a second power range corresponding to a second motor according to a preset proportion, and controlling the first motor and the second motor to operate within the first power range and the second power range; and the first motor and / or the second motor are / is controlled in a first control mode and / or a second control mode, so that the situation of overpower of the battery or the situation of instantaneous overpower can be quickly controlled, the situation of over-discharge of the battery is prevented, meanwhile, the situation of excessive limitation can also be prevented, and the service life of the battery is prolonged. And the driving safety of the new energy automobile is ensured, and sufficient power performance is provided.

Description

Technical Field

[0001] The present invention relates to the field of control of vehicle equipment, and particularly to a power control method, system and vehicle for a vehicle. Background Art

[0002] With the development of new energy technologies, new energy vehicles have attracted more and more attention. Among them, power management in new energy vehicles has always been the focus of attention.

[0003] Since new energy vehicles can only obtain energy by discharging the battery and have no other energy supplement, it is generally required that the actual charge and discharge power of the battery does not exceed the current power range of the battery under normal operating conditions of new energy vehicles to prevent the occurrence of over-discharge of the battery. Therefore, it is necessary to limit and control the situation of over-power or possible over-power, so as to prevent the occurrence of over-charge and over-discharge of the battery, or even if over-discharge occurs, the battery can be protected through timely adjustment and control, preventing the shortening of the battery life or the occurrence of failures caused by over-discharge, thereby ensuring the charge and discharge performance of the battery and the safety of the new energy vehicle during driving. On the other hand, when limiting and controlling to prevent over-discharge of the battery, it cannot be overly restricted, otherwise it will affect the power performance and driving range of the new energy vehicle.

[0004] It should be noted that the above introduction of the technical background is only for the convenience of clearly and completely explaining the technical solution of the present invention and facilitating the understanding of those skilled in the art. It cannot be considered that the above technical solutions are well-known to those skilled in the art just because these solutions are described in the background art part of the present invention. Summary of the Invention

[0005] In order to solve at least one of the above-mentioned problems in the prior art, the present invention provides a power control method, system and vehicle for a vehicle, which can prevent the occurrence of battery over-power or can quickly control even if instantaneous battery over-power occurs, and at the same time can also prevent the occurrence of excessive restriction, ensuring the safety of the new energy vehicle during driving and providing sufficient power performance.

[0006] According to the first aspect of an embodiment of the present invention, a power control method for a vehicle is provided. The vehicle includes a first motor and a second motor, and the power control method for the vehicle includes:

[0007] Obtain the power range of the battery, and determine the available power range for driving the motor according to the power range;

[0008] Allocate the available power range according to a preset ratio into a first power range corresponding to the first motor and a second power range corresponding to the second motor, and control the first motor and the second motor to operate within the first power range and the second power range;

[0009] The power control method of the vehicle further includes:

[0010] Controlling the first motor and / or the second motor in a first control mode and / or a second control mode,

[0011] wherein,

[0012] In the first control mode, when the power range of the battery changes, calculate the difference in the change of the available power range, and distribute the difference in the change of the available power range to the first power range and the second power range according to a preset ratio;

[0013] In the second control mode, calculate the first parameter range corresponding to the first motor according to the first power range, calculate the second parameter range corresponding to the second motor according to the second power range, and when the first parameter of the first motor exceeds the first parameter range, and / or, the second parameter of the second motor exceeds the second parameter range, limit control is performed on the first parameter range and / or the second parameter range.

[0014] Furthermore, in the first control mode, by distributing the available power range and the exceeded or reduced part when the available power range changes to the power ranges of the two motors according to a ratio, the power ranges of the motors change in real time based on the power range of the battery, which can prevent the occurrence of over-power situations under normal circumstances, prevent the occurrence of over-discharge of the battery, and is beneficial to improving the service life of the battery. In the second control mode, when there is a situation where the instantaneous power of a certain motor is too large, since this kind of power-over phenomenon often occurs in a very short time, the second control mode is adopted to directly judge in the controller of the motor and lower the parameter range of the motor, so that the torque range of the corresponding motor is lowered, the response speed is extremely fast, the instantaneous over-power situation is adjusted in a timely manner, and the continuous occurrence of the instantaneous over-power phenomenon is prevented. Moreover, the adjustment of the parameter range of this motor will not affect the power range of the other motor, and independent adjustment between the motors can be achieved without over-limiting.

[0015] According to the second aspect of the embodiments of the present invention, the vehicle includes a vehicle controller, a first motor controller corresponding to the first motor, and a second motor controller corresponding to the second motor,

[0016] In the first control mode, the vehicle controller calculates a first torque range and a second torque range according to the changed first power range and the second power range, and sends the first torque range and the second torque range to the first motor controller and the second motor controller respectively; the first motor controller and the second motor controller respectively control the output torques of the first motor and the second motor to be within the first torque range and the second torque range;

[0017] And / or, in the second control mode, the vehicle controller sends the first parameter range and the second parameter range to the first motor controller and the second motor controller respectively. When the first motor controller and / or the second motor controller determines that the first parameter of the first motor exceeds the first parameter range, and / or the second parameter of the second motor exceeds the second parameter range, the first motor controller and / or the second motor controller respectively control to lower the first parameter range and / or the second parameter range, and obtain a third torque range of the output torque of the first motor and / or a fourth torque range of the output torque of the second motor based on the lowered first parameter range and / or the second parameter range. The first motor controller and the second motor controller respectively control the output torques of the first motor and / or the second motor to be within the third torque range and / or the fourth torque range.

[0018] Further, in the first control mode, the vehicle controller mainly adjusts the torque range of the motor in real time according to the change of the power range of the battery, so as to ensure that the overall power consumption is within the power range of the battery under normal circumstances, thereby preventing the occurrence of over-power situations under normal circumstances. In the second control mode, the motor controller mainly judges whether a certain motor has an instantaneous over-power situation. If so, the motor controller directly lowers the parameter range of the motor to lower the torque range, timely inhibits the continuous occurrence of the over-power situation, does not need to communicate with the vehicle controller, can respond quickly and control and adjust in time, and will not affect another motor, and can be adjusted in time when an instantaneous power is too large, preventing the continuous occurrence of the instantaneous over-power phenomenon.

[0019] According to the third aspect of the embodiments of the present invention, the preset ratio is the driving force distribution ratio of the first motor and the second motor.

[0020] Further, the power range is allocated based on the driving force distribution ratio of the two motors, so that the two motors can distribute power according to an ideal ratio, maximizing the power utilization and avoiding power waste. Moreover, the driving force distribution ratio can change based on the actual situation or settings of the vehicle. No matter how it changes, the power range of each motor is calculated based on the current driving force distribution ratio, so that the power distribution of the two motors conforms to the current ideal ratio.

[0021] According to the fourth aspect of the embodiments of the present invention, the first control method is implemented in the vehicle's vehicle controller, and / or the second control method is implemented in the motor controllers of the first motor and / or the second motor.

[0022] Further, in the first control method, it is mainly realized by the vehicle controller through judgment and control, which is applicable to the control adjustment when the power range of the normal battery changes, thereby preventing the occurrence of over-power situations under normal circumstances. In the second control method, it is mainly realized by the motor controller through judgment and control. Without communication with the vehicle controller, it can respond quickly and control and adjust in a timely manner, so that it can be adjusted in time when the instantaneous power is too large, preventing the continuous occurrence of instantaneous over-power phenomena. No matter what situation the vehicle is in, it can control the over-power situation, protect the battery, extend the service life of the battery and ensure the safety of the vehicle.

[0023] According to the fifth aspect of the embodiments of the present invention, the calculation of the first power range and the second power range, as well as the first parameter range and the second parameter range, is completed in the vehicle's vehicle controller.

[0024] Further, by calculating each range in the vehicle controller, various required data can be easily obtained, and the data can be fed back to different motor controllers through the vehicle controller.

[0025] According to the sixth aspect of the embodiments of the present invention, the first parameter is the first current output by the first motor, and the first parameter range is the first current range output by the first motor.

[0026] The second parameter is the second current output by the second motor, and the second parameter range is the second current range output by the second motor.

[0027] Further, by comparing the current of the motor with its range, it is possible to simply and quickly determine whether there is an instantaneous over-power situation on the motor side. Thus, by restricting and controlling the current range of the motor, the output torque of the motor can be quickly controlled, so as to timely adjust the situation of excessive instantaneous power, improve the safety of the vehicle, and moreover, the adjustment of the power range of a certain motor will not affect the power range of the other motor, and there will be no situation of excessive power restriction.

[0028] According to the seventh aspect of the embodiments of the present invention, in the second control mode, when the first current exceeds the first current range, the first current range is lowered;

[0029] and / or, when the second current exceeds the second current range, the second current range is lowered.

[0030] Further, by comparing the current of the motor with its range, it is possible to simply and quickly determine whether there is an instantaneous over-power situation. By lowering the current range of the motor on the side where the output current exceeds the current range, it can be simply completed on the motor side, and moreover, it will not affect the current range of the motor on the other side, preventing the situation of excessive restriction and being beneficial to providing sufficient power performance.

[0031] According to the eighth aspect of the embodiments of the present invention, in the second control mode,

[0032] According to the lowered first current range, a third torque range of the output torque of the first motor is obtained, and the output torque of the first motor is controlled within the third torque range,

[0033] and / or, according to the lowered second current range, a fourth torque range of the output torque of the second motor is obtained, and the output torque of the second motor is controlled within the fourth torque range.

[0034] Further, according to the lowered current range, the corresponding torque range is adjusted, so that the power consumption of the motor is lowered, thus ensuring that the overall power consumption is within the power range of the battery. Timely adjustment of the instantaneous over-power situation of the single-side motor avoids the continuous occurrence of the instantaneous over-power situation and ensures the safety of the vehicle.

[0035] According to the ninth aspect of the embodiments of the present invention, the vehicle includes a battery management system, and the power range of the battery is obtained from the battery management system.

[0036] Further, since the power range of the battery may vary differently based on the settings of the vehicle's battery management system and the power range of the battery also changes in real time based on the vehicle conditions, it is necessary to control the motor based on the real-time power range of the battery. By obtaining the power range of the battery from the battery management system, the power range of the battery can be obtained in real time to promptly respond to power changes, prevent the battery from exceeding its power limit, and is beneficial to extending the battery life.

[0037] According to a tenth aspect of an embodiment of the present invention, there is provided a power control system for a vehicle, including a vehicle controller, a first motor controller corresponding to a first motor, and a second motor controller corresponding to a second motor. The vehicle controller obtains the power range of the battery and determines an available power range for driving the motor according to the power range.

[0038] The vehicle controller distributes the available power range into a first power range corresponding to the first motor and a second power range corresponding to the second motor according to a preset ratio.

[0039] The first motor controller controls the first motor to operate within the first power range, and the second motor controller controls the second motor to operate within the second power range.

[0040] The power control system of the vehicle controls the first motor and / or the second motor in a first control mode and / or a second control mode.

[0041] In the first control mode, when the vehicle controller determines that the power range of the battery changes, it calculates the difference in the change of the available power range and distributes the difference in the change of the available power range into the first power range and the second power range respectively according to a preset ratio.

[0042] In the second control mode, the vehicle controller calculates a first parameter range corresponding to the first motor according to the first power range and calculates a second parameter range corresponding to the second motor according to the second power range. When the first motor controller and / or the second motor controller determines that the first parameter of the first motor exceeds the first parameter range and / or the second parameter of the second motor exceeds the second parameter range, the first motor controller and / or the second motor controller performs limit control on the first parameter range and / or the second parameter range.

[0043] Further, in the first control mode, by proportionally allocating the available power range and the excess or reduction part when the available power range changes to the power ranges of the two motors, and the power ranges of the motors change in real time based on the power range of the battery, it is possible to prevent the occurrence of over-power situations under normal circumstances and prevent the occurrence of battery over-discharge phenomena, thereby facilitating the improvement of the battery service life. In the second control mode, when there is a situation where the instantaneous power of a certain motor is too large, since this phenomenon of excessive power often occurs in a very short time, the second control mode is adopted. In the controller of this motor, it is directly judged and the parameter range of this motor is adjusted downward, so that the torque range of the corresponding motor is adjusted downward. The response speed is extremely fast, and the instantaneous over-power situation is timely adjusted to prevent the continuous occurrence of the instantaneous over-power phenomenon. Moreover, the adjustment of the power range of this motor will not affect the power range of the other motor, and independent adjustment between the motors can be achieved, without the situation of excessive restriction, ensuring sufficient power performance while adjusting the instantaneous over-power situation.

[0044] According to the eleventh aspect of the embodiment of the present invention, in the first control mode, the vehicle controller calculates a first torque range and a second torque range according to the changed first power range and the second power range, and sends the first torque range and the second torque range to the first motor controller and the second motor controller respectively; the first motor controller and the second motor controller respectively control the output torques of the first motor and the second motor within the first torque range and the second torque range;

[0045] And / or, in the second control mode, the vehicle controller sends the first parameter range and the second parameter range to the first motor controller and the second motor controller respectively. When the first motor controller and / or the second motor controller determines that the first parameter of the first motor exceeds the first parameter range, and / or the second parameter of the second motor exceeds the second parameter range, the first motor controller and / or the second motor controller respectively control the downward adjustment of the first parameter range and / or the second parameter range, and obtain a third torque range of the output torque of the first motor and / or a fourth torque range of the output torque of the second motor based on the downward-adjusted first parameter range and / or the second parameter range. The first motor controller and the second motor controller respectively control the output torques of the first motor and / or the second motor within the third torque range and / or the fourth torque range.

[0046] Further, in the first control mode, the vehicle controller mainly adjusts the torque range of the motor in real time according to the change of the power range of the battery, so as to ensure that the overall power consumption is within the power range of the battery under normal circumstances, thereby preventing the occurrence of over-power situations under normal circumstances. In the second control mode, the motor controller mainly judges whether there is an instantaneous over-power situation in a certain motor. If so, it directly reduces the parameter range of the motor in the motor controller, thereby reducing the torque range, quickly suppressing the continuous occurrence of the over-power situation, without communicating with the vehicle controller, can respond quickly and control and adjust in time, and will not affect another motor, and can be adjusted in time when the instantaneous power is too large, preventing the continuous occurrence of the instantaneous over-power phenomenon.

[0047] According to the twelfth aspect of the embodiments of the present invention, the preset ratio is the driving force distribution ratio between the first motor and the second motor.

[0048] Further, the power range is allocated based on the driving force distribution ratio of the two motors, so that the two motors can distribute the power according to the ideal ratio, thereby maximizing the power utilization and preventing power waste. Moreover, the driving force distribution ratio can change based on the actual situation or settings of the vehicle. No matter how it changes, the power range of each motor is calculated based on the current driving force distribution ratio, so that the power distribution of the two motors conforms to the current ideal ratio.

[0049] According to the thirteenth aspect of the embodiments of the present invention, the first parameter is the first current output by the first motor, and the first parameter range is the first current range.

[0050] The second parameter is the second current output by the second motor, and the second parameter range is the second current range.

[0051] Further, by comparing the current of the motor with its current range, it can be simply and quickly judged whether there is an instantaneous over-power situation in the motor on this side. Thus, by restricting and controlling the current range of the motor, the output torque of the motor can be quickly controlled, so as to timely adjust the situation of excessive instantaneous power, improve the safety of the vehicle, and the adjustment of the power range of a certain motor will not affect the power range of another motor, and there will be no situation of excessive power limitation.

[0052] According to the fourteenth aspect of the embodiments of the present invention, when the first motor controller judges that the first current exceeds the first current range, the first current range is reduced;

[0053] And / or, when the second motor controller judges that the second current exceeds the second current range, the second current range is reduced.

[0054] Furthermore, by comparing the current of the motor with its range, it is possible to simply and quickly determine whether an instantaneous over-power situation has occurred. By adjusting down the current range of the motor on the side where the output current exceeds the current range, it will not affect the current range of the motor on the other side, preventing over-limitation and facilitating the provision of sufficient power performance.

[0055] According to the fifteenth aspect of the embodiments of the present invention, the power control system includes a battery management system, and the vehicle controller obtains the power range of the battery from the battery management system.

[0056] Furthermore, since the power range of the battery may vary differently based on the settings of the vehicle's battery management system and may also change in real time based on the vehicle's conditions, it is necessary to control the motor based on the real-time power range of the battery. By obtaining the power range of the battery from the battery management system, the power range of the battery can be obtained in real time to promptly respond to power changes, prevent battery over-power situations, and facilitate the extension of battery life.

[0057] According to the sixteenth aspect of the embodiments of the present invention, a vehicle is provided, and the vehicle includes the power control system of the vehicle described in any one of the embodiments from the ninth aspect to the fifteenth aspect.

[0058] One of the beneficial effects of the embodiments of the present invention is that by controlling the motor in two control modes, it is possible to prevent the occurrence of battery over-power situations under normal circumstances or quickly control them even if an instantaneous over-power situation occurs. At the same time, it can also prevent over-limitation, and ensure that the two motors maximize the utilization of battery power in an ideal ratio, ensuring the performance of the battery, the safety of vehicle driving, and providing sufficient power performance.

[0059] Referring to the following description and drawings, the embodiments of the present invention are disclosed in detail. It should be understood that the embodiments of the present invention are not limited in scope thereby. Within the spirit and terms of the appended claims, the embodiments of the present invention include many changes, modifications, and equivalents.

[0060] Features described and / or illustrated for one embodiment can be used in the same or similar manner in one or more other embodiments, combined with the features in other embodiments, or replace the features in other embodiments.

[0061] It should be emphasized that the terms "comprising / including / having" when used herein refer to the presence of features, whole units, or components, but do not exclude the presence or addition of one or more other features, whole units, or components. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] The above and other objects, features and advantages of the embodiments of the present invention will become more apparent from the following detailed description in conjunction with the accompanying drawings, in which:

[0063] Figure 1 is a flowchart of a power control method for a vehicle according to Embodiment 1 of the present invention;

[0064] Figure 2 is an explanatory diagram of implementing the power control method of Embodiment 1 of the present invention in a vehicle;

[0065] Figure 3 is a schematic block diagram of an embodiment of a power control system for a vehicle according to Embodiment 2 of the present invention;

[0066] Figure 4 is a schematic block diagram of a power control device for a vehicle according to an embodiment of the present invention. Detailed Embodiments

[0067] Referring to the accompanying drawings, through the following description, the foregoing and other features of the present invention will become apparent. In the description and drawings, specific embodiments of the present invention are specifically disclosed, which show some embodiments in which the principles of the present invention can be adopted. It should be understood that the present invention is not limited to the described embodiments, but includes all modifications, equivalents, and alternatives falling within the scope of the appended claims.

[0068] The power control method, system, and vehicle of the embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0069] Embodiment 1

[0070] Embodiment 1 of the present invention provides a power control method for a vehicle. The power control method of Embodiment 1 of the present invention can be applied to a vehicle with multiple motors. For example, it can be used in a four-wheel drive vehicle. For the convenience of description, a dual-motor example is used below. For example, the first motor refers to the front-wheel drive motor, and the second motor refers to the rear-wheel drive motor, and vice versa.

[0071] Figure 1 is a flowchart of a power control method for a vehicle according to Embodiment 1 of the present invention.

[0072] As Figure 1 shown, the vehicle power control method 100 includes:

[0073] Step 101: Obtain the power range of the battery, and determine the available power range for driving the motor according to the power range;

[0074] Step 102: Allocate the available power range into a first power range corresponding to the first motor and a second power range corresponding to the second motor according to a preset ratio, and control the first motor and the second motor to operate within the first power range and the second power range;

[0075] Step 103: Control the first motor and / or the second motor in a first control mode and / or a second control mode. In the first control mode, when the power range of the battery changes, calculate the difference in the change of the available power range, and allocate the difference in the change of the available power range to the first power range and the second power range according to a preset ratio. In the second control mode, calculate a first parameter range corresponding to the first motor according to the first power range, and calculate a second parameter range corresponding to the second motor according to the second power range. When the first parameter of the first motor exceeds the first parameter range and / or the second parameter of the second motor exceeds the second parameter range, limit control is performed on the first parameter range and / or the second parameter range.

[0076] Thus, in the first control mode, by allocating the available power range and the excess or reduction part when the available power range changes to the power ranges of the two motors according to a ratio, the power ranges of the motors change in real time based on the power range of the battery, which can prevent the occurrence of over-power situations under normal circumstances and prevent the occurrence of battery over-discharge phenomena. In the second control mode, when there is a situation where the instantaneous power of a certain motor is too large, since this kind of power-over phenomenon often occurs in a very short time, the second control mode is adopted to directly judge in the controller of the motor and lower the parameter range of the motor, so that the torque range of the corresponding motor is lowered. The response speed is extremely fast, and the over-power situation is adjusted in a timely manner to prevent the continuous occurrence of instantaneous over-power phenomena. Moreover, the adjustment of the torque range of this motor will not affect the power range of the other motor, and independent adjustment between motors can be achieved without over-limitation. In addition, by controlling the motors in two control modes, it can prevent the occurrence of battery over-power situations under normal circumstances, or even if there is an instantaneous over-power situation, it can be quickly controlled, which is beneficial to the improvement of the battery service life. At the same time, it can also prevent the occurrence of over-limitation, ensuring the safety of vehicle driving and providing sufficient power performance.

[0077] In the embodiments of the present invention, the power can also be electrical energy, as long as it is a parameter that can reflect the power supply ability of the battery, and the embodiments of the present invention do not limit this. The power of the battery is not only used to drive the motor, but also used to supply power to other electronic devices or electronic components. The available power refers to the power that can be used to drive the motor. The range of the power or the available power can be a value, for example, 1000 watts (W), or it can be a range, for example, 800W to 1000W. The power range can include an upper power limit and a lower power limit. The change in the power range of the battery can be a change in the upper power limit, a change in the lower power limit, or both. The battery can also be a high-voltage battery, which is not limited here. The power range of the battery can be obtained through the battery management system. For example, the battery management system is inferred from the performance of the battery cells, or it can be obtained by looking up a pre-set Map table. The specific methods for obtaining the power range and the available power range of the battery can refer to the related technologies, and the embodiments of the present invention do not limit this. In this way, by obtaining the power range of the battery from the battery management system, the power range of the battery can be obtained in real time to timely respond to the change of power, prevent the battery from exceeding the power under normal circumstances, and is beneficial to extending the battery life.

[0078] In some embodiments, the preset ratio can be the driving force distribution ratio between the first motor and the second motor.

[0079] Thus, according to the driving force distribution ratio between the first motor and the second motor, the available power range is allocated to a first power range corresponding to the first motor and a second power range corresponding to the second motor. Based on the driving force distribution ratio of the two motors to allocate the power range, the two motors can be allocated in an ideal ratio, so that the power utilization is maximized and power waste is not caused.

[0080] For a multi-motor vehicle, the ratio of the driving forces of each motor can be preset. For example, the distribution ratio of the power performance of the front-wheel drive motor and the rear-wheel drive motor is 3:7, 4:6, etc. The driving force distribution ratio can be fixed or not fixed. For example, it can be set according to the driving mode of the vehicle or the road conditions, or it can be user-defined, etc. The embodiments of the present invention do not limit this. No matter how the driving force distribution ratio changes, calculate the power range of each motor according to the current driving force distribution ratio, so that the power distribution of the two motors conforms to the current ideal ratio.

[0081] For example, in step 102, the upper power limit of the available power range is, for example, 800 W, and the driving force distribution ratio of the first motor and the second motor is, for example, 4:6. Then, the upper power limit of the first power range corresponding to the first motor is 320 W, and the upper power limit of the second power range corresponding to the second motor is 480 W. For example, the upper limit of the available power range can be 250 kW, and the lower limit can be -80 kW. The upper and lower limits of the first power range and the second power range can be calculated respectively according to the driving force distribution ratio. When both the upper and lower limits of the available power range change, the difference between the changed upper and lower limits can be calculated, and this difference can be proportionally distributed to the upper and lower limits of the first power range and the second power range respectively.

[0082] In some embodiments, the first control method is implemented in the vehicle's vehicle control unit, and the second control method is implemented in the motor control unit of the first motor and / or the second motor. Additionally, the calculations of the first power range and the second power range, as well as the first parameter range and the second parameter range, are completed in the vehicle's vehicle control unit. The vehicle control unit can be a vehicle control unit, and depending on the vehicle settings, it can be any component such as a VCU, ICM, etc. that can achieve similar functions, and no limitation is made here.

[0083] In this way, in the first control method, it is mainly judged and controlled through the vehicle control unit, which is applicable to the control adjustment when the power range of the normal battery changes, thereby preventing the occurrence of over-power situations under normal circumstances. In the second control method, it is mainly judged and controlled through the motor control unit, without the need for communication with the vehicle control unit, and can quickly respond and timely control and adjust, so that it can be adjusted in time when the instantaneous power is too large, preventing the continuous occurrence of instantaneous over-power phenomena. Regardless of the situation of the vehicle, it can control over-power situations, protect the battery, improve the service life of the battery, and ensure the safety of the vehicle. Additionally, by calculating each range in the vehicle control unit, various required data can be easily obtained, improving the response speed of the vehicle.

[0084] Figure 2 It is an explanatory diagram of implementing the power control method of Embodiment 1 of the present invention in a vehicle.

[0085] As Figure 2 shown, the vehicle of the embodiment of the present invention can include a first motor (DU 1) 201, a second motor (DU 2) 202, a vehicle control unit (ICM) 203, a first motor control unit (DU1 ECU) 204 corresponding to the first motor 201, and a second motor control unit (DU1 ECU) 205 corresponding to the second motor 202. The first control method is implemented in the vehicle control unit 203, and the second control method is implemented in the first motor control unit 204 and / or the second motor control unit 205.

[0086] As Figure 2 shown, the vehicle controller 203 obtains the power range 210 of the battery, such as the real-time power range of the battery, and determines the available power range 211 for driving the motor according to the power range 210. Since the power of the battery is not only used to drive the motor but also to supply power to other auxiliary machines, when determining the available power range 211, it is necessary to subtract the auxiliary machine load margin 221 from the power range 210 of the battery.

[0087] The vehicle controller 203 distributes the available power range 211 into a first power range 213 corresponding to the first motor 201 and a second power range 214 corresponding to the second motor 202 according to the driving force distribution ratio 212 of the first motor 201 and the second motor 202; the first motor controller 204 controls the first motor 201 to operate within the range of the first power range 213, and the second motor controller 205 controls the second motor 202 to operate within the range of the second power range 214.

[0088] In this way, by distributing the available power range to the power ranges of the two motors according to the driving force distribution ratio, it can be ensured that the two motors can operate according to the ideal distribution ratio, so as to maximize the power utilization and avoid power waste.

[0089] For example, as Figure 2 shown, in the first control mode, the vehicle controller 203 calculates a first torque range 215 and a second torque range 216 according to the first power range 213 and the second power range 214, and sends the first torque range 215 and the second torque range 216 to the first motor controller 204 and the second motor controller 205 respectively. The first motor controller 204 and the second motor controller 205 control the first motor 201 and the second motor 202 respectively according to the first torque range 215 and the second torque range 216.

[0090] In addition, in the first control mode, the vehicle controller 203 also determines the change in the power range of the battery. If the power range 210 of the battery changes, the vehicle controller 203 can also calculate the difference in the change of the available power range 211. According to the driving force distribution ratio 212 of the first motor 201 and the second motor 202, the difference in the change of the available power range 211 is respectively allocated to the first power range 213 and the second power range 214. Furthermore, the adjusted first torque range 215 corresponding to the first motor 201 can be calculated according to the adjusted first power range 213, the adjusted second torque range 216 corresponding to the second motor 202 can be calculated according to the second power range 214, and the adjusted first torque range 215 and the second torque range 216 are respectively sent to the first motor controller 204 and the second motor controller 205. The first motor controller 204 and the second motor controller 205 can respectively control the output torques of the first motor 201 and the second motor 202 within the adjusted first torque range 215 and the second torque range 216, so that the two motors operate within the adjusted torque range, thereby avoiding the occurrence of over-power in normal situations.

[0091] In this way, by allocating the exceeded or reduced part of the battery power range change to the power ranges of the two motors according to the driving force distribution ratio, it can be ensured that the two motors after adjustment can still operate according to the ideal distribution ratio.

[0092] In some embodiments, as Figure 2 shown, the first motor 201 and the second motor 202 can also be controlled according to the second control mode.

[0093] For example, the first parameter can be the first current output by the first motor 201, and the first parameter range can be the first current range 217, that is, the first current range 217 is the range of the first current. The second parameter can be the second current output by the second motor 202, and the second parameter range can be the second current range 218, that is, the second current range 218 is the range of the second current.

[0094] In the second control mode, the first motor controller 204 can determine whether the first current of the first motor 201 exceeds the first current range 217, and the second motor controller 205 can determine whether the second current of the second motor 202 exceeds the second current range 218. When the first motor controller 204 determines that the first current of the first motor 201 exceeds the first current range 217, the first current range 217 is lowered, and based on the lowered first current range 217, a third torque range 219 of the output torque of the first motor 201 is obtained, and the output torque of the first motor 201 is controlled within the third torque range 219; or when the second motor controller 205 determines that the second current of the second motor 202 exceeds the second current range 218, the second current range 218 is lowered, and based on the lowered second current range 218, a fourth torque range 220 of the output torque of the second motor 202 is obtained, and the output torque of the second motor 202 is controlled within the fourth torque range 220.

[0095] In the embodiment of the present invention, the control of the first motor 201 by the first motor controller 204 and the control of the second motor 202 by the second motor controller 205 are independent of each other. The control of the two motors can be carried out separately or simultaneously. That is to say, the second control mode can control only the motor on one side that exceeds the parameter range without affecting the motor on the other side, so that the situation of excessive restriction will not occur. While controlling in a timely manner when instantaneous over-power occurs, the power operation of the other motor will not be affected, thus ensuring the dynamic performance of the vehicle.

[0096] In this way, in the second control mode, the motor controller determines whether there is an instantaneous over-power situation for a certain motor. If so, the torque range of the motor is directly lowered by the motor controller to timely suppress the continuous occurrence of the instantaneous over-power situation. There is no need to communicate with the vehicle controller, and it can respond quickly and control and adjust in a timely manner. Moreover, it will not affect the other motor, and can be adjusted in a timely manner when the instantaneous power is too large to prevent the continuous occurrence of the over-power phenomenon. In addition, by lowering the current range of the motor on the side where the output current exceeds the current range, the current range of the motor on the other side will not be affected, preventing the situation of excessive restriction and being beneficial to providing sufficient dynamic performance.

[0097] In addition, adjusting the corresponding torque range according to the lowered current range can quickly reduce the power consumption of the motor on that side, improve the instantaneous over-power situation, and ensure the safety of the overall operation.

[0098] In the embodiments of the present invention, the first control method may also be referred to as the "constant control method", and the second control method may also be referred to as the "instantaneous control method". The first control method and the second control method are independent of each other and can control the motor separately or simultaneously. The embodiments of the present invention do not limit this.

[0099] In an actual scenario, the battery power management during normal vehicle driving is usually carried out in the vehicle's vehicle controller. However, during normal vehicle driving, sudden situations may occur, such as skidding, sharp turning, etc. Such sudden situations may cause the instantaneous power of a single-side motor to be too large. This situation of excessive power generally only occurs for a very short time, such as within 1 second. If a conventional control method is used, in the vehicle controller, the power range value of the battery needs to be lowered before the power range and torque range of the motor can be finally lowered in the motor controller. However, there is a response time from the adjustment of the vehicle controller to the adjustment of the motor controller. It is possible that the situation of excessive instantaneous power has ended, but the torque range of the motor has not yet decreased, so timely adjustment cannot be obtained.

[0100] Therefore, in the embodiments of the present invention, the battery power control is divided into a first control method and a second control method. The first control method is applicable to the control of preventing over-power when the power range of the battery changes, and the second control method is applicable to the control corresponding to instantaneous over-power in the case of excessive instantaneous power of a single-side motor. In this way, by controlling the motor through the first control method and the second control method, different application scenarios can be adapted. It can not only prevent the occurrence of over-power in normal situations, but also perform timely control and adjustment in the case of excessive instantaneous power, ensuring battery performance and vehicle safety while preventing excessive limitation and providing sufficient power performance. For the second control method, the judgment is implemented in the controller on the corresponding motor side. When the actual current value of the motor exceeds its current range value, control needs to be restricted. And under the second control method, directly judging in the motor controller and adjusting the current range value can directly cause the torque range value of the motor to decrease. The response speed is very fast and can be completed quickly, and timely adjustment can be made for the excessive power occurring instantaneously. In addition, the instantaneous control only occurs on the corresponding motor side and will not affect the torque range value of the other motor.

[0101] In this way, under the first control method, the torque range value of the motor is regulated in real time based on the real-time power range value of the battery, which can prevent the occurrence of over-power in normal situations and prevent the occurrence of over-discharge of the battery; under the second control method, when an instantaneous over-power situation occurs in one side motor, only the judgment is made in the motor controller of that motor and only the torque range of that motor is restricted and controlled. The response speed is fast and there will be no situation of excessive limitation, preventing the battery from over-discharging and ensuring the service life of the battery.

[0102] As can be seen from the above embodiments, by controlling the motor in two control modes, it is possible to prevent the battery from exceeding its power under normal circumstances, or even if the instantaneous power of one-sided motor exceeds the limit, it can be quickly controlled. At the same time, it can also prevent the situation of excessive limitation, and ensure that the two motors maximize the utilization of battery power according to the ideal ratio, guarantee the performance and service life of the battery, the safety of vehicle driving, and provide sufficient power performance.

[0103] Embodiment 2

[0104] Embodiment 2 of the present invention provides a power control system for a vehicle. Figure 3 It is a schematic block diagram of an implementation manner of the power control system for the vehicle according to Embodiment 2 of the present invention.

[0105] As Figure 3 shown, the power control system 300 includes a vehicle controller 301, a first motor controller 302, and a second motor controller 303. Among them, the first motor controller 302 controls the first motor of the vehicle, and the second motor controller 303 controls the second motor of the vehicle.

[0106] In at least one embodiment, the vehicle controller 301 obtains the power range of the battery, and determines the available power range for driving the motor according to the power range;

[0107] The vehicle controller 301 distributes the available power range to a first power range corresponding to the first motor and a second power range corresponding to the second motor according to a preset ratio;

[0108] The first motor controller 302 controls the first motor to operate within the range of the first power range, and the second motor controller 303 controls the second motor to operate within the range of the second power range.

[0109] In addition, the power control system 300 also controls the first motor and / or the second motor in a first control mode and / or a second control mode;

[0110] In the first control mode, when the vehicle controller 301 determines that the power range of the battery changes, it calculates the difference in the change of the available power range, and distributes the difference in the change of the available power range to the first power range and the second power range according to a preset ratio respectively;

[0111] In the second control mode, the vehicle controller 301 calculates the first parameter range corresponding to the first motor according to the first power range, and calculates the second parameter range corresponding to the second motor according to the second power range. When the first motor controller 302 and / or the second motor controller 303 determines that the first parameter of the first motor exceeds the first parameter range, and / or the second parameter of the second motor exceeds the second parameter range, the first motor controller 302 and / or the second motor controller 303 performs limit control on the first parameter range and / or the second parameter range.

[0112] In this way, in the first control mode, by proportionally distributing the available power range and the exceeded or reduced part when the available power range changes to the power ranges of the two motors, the power ranges of the motors change in real time based on the power range of the battery, which can prevent the occurrence of over-power situations under normal circumstances and prevent the occurrence of battery over-discharge phenomena. In the second control mode, when the instantaneous power of a certain motor is too large, since this kind of power-over phenomenon often occurs in a very short time, the second control mode is adopted to directly judge in the controller of the motor and lower the parameter range of the motor, so that the torque range of the corresponding motor is lowered, and the response speed is extremely fast. Timely adjustment of the over-power situation can prevent the continuous occurrence of instantaneous over-power phenomena, and the adjustment of the torque range of this motor will not affect the power range of the other motor, and independent adjustment between motors can be achieved without over-limitation.

[0113] In at least one embodiment, in the first control mode, the vehicle controller 301 calculates the first torque range and the second torque range according to the changed first power range and the second power range, and sends the first torque range and the second torque range to the first motor controller 302 and the second motor controller 303 respectively; the first motor controller 302 and the second motor controller 303 respectively control the output torques of the first motor and the second motor within the first torque range and the second torque range;

[0114] And / or, in the second control mode, the vehicle controller 301 sends the first parameter range and the second parameter range to the first motor controller 302 and the second motor controller 303 respectively. When the first motor controller 302 and / or the second motor controller 303 determines that the first parameter of the first motor exceeds the first parameter range, and / or the second parameter of the second motor exceeds the second parameter range, the first motor controller 302 and / or the second motor controller 303 respectively controls the downward adjustment of the first parameter range and / or the second parameter range, and based on the downward-adjusted first parameter range and / or the second parameter range, obtains the third torque range of the output torque of the first motor and / or the fourth torque range of the output torque of the second motor. The first motor controller 302 and the second motor controller 303 respectively control the output torque of the first motor and / or the second motor to be within the third torque range and / or the fourth torque range.

[0115] In this way, in the first control mode, the vehicle controller mainly adjusts the torque range of the motor in real time according to the change of the power range of the battery, so as to ensure that the overall power consumption is within the power range of the battery under normal circumstances, thereby preventing the occurrence of over-power situations under normal circumstances. In the second control mode, the motor controller mainly judges whether there is an instantaneous over-power situation for a certain motor. If so, it directly reduces the torque range of the motor in the motor controller to timely suppress the continuous occurrence of the instantaneous over-power situation, without communicating with the vehicle controller, can respond quickly and control and adjust in time, and will not affect another motor, preventing excessive restriction and providing sufficient power performance.

[0116] In at least one embodiment, the preset ratio is the driving force distribution ratio of the first motor and the second motor.

[0117] In this way, the power range is allocated based on the driving force distribution ratio of the two motors, so that the two motors can be allocated according to an ideal ratio, thereby maximizing the power utilization and preventing power waste. Moreover, the driving force distribution ratio can change based on the actual situation or settings of the vehicle. No matter how it changes, the power range of each motor is calculated based on the current driving force distribution ratio, so that the power distribution of the two motors conforms to the current ideal ratio.

[0118] In at least one embodiment, the first parameter is the first current output by the first motor, the first parameter range is the first current range, the second parameter is the second current output by the second motor, and the second parameter range is the second current range.

[0119] In this way, by comparing the current of the motor with its current range, it is possible to simply and quickly determine whether there is an instantaneous over-power situation on the motor side. Thus, by controlling the output current of the motor, the output torque of the motor can be quickly controlled, so that timely adjustment can be made for the situation of excessive instantaneous power, improving the safety of the vehicle. Moreover, the adjustment of the current range of one side motor will not affect the power range of the other motor, and there will be no situation of excessive power limitation.

[0120] In at least one embodiment, when the first motor controller 302 determines that the first current exceeds the first current range, the first current range is lowered.

[0121] And / or, when the second motor controller 303 determines that the second current exceeds the second current range, the second current range is lowered.

[0122] In this way, by comparing the current of the motor with its current range, it is possible to simply and quickly determine whether there is an instantaneous over-power situation. By lowering the current range of the motor on the side where the output current exceeds the current range, it will not affect the current range of the other motor, preventing the situation of excessive limitation, which is beneficial to providing sufficient power performance.

[0123] In at least one embodiment, the power control system 300 includes a battery management system 304, and the vehicle controller 301 obtains the power range of the battery from the battery management system 304.

[0124] In this way, since the power range of the battery may change differently based on the settings of the vehicle's battery management system, and the power range of the battery will also change in real time based on the vehicle's situation, it is necessary to control the motor based on the real-time power range of the battery. By obtaining the power range of the battery from the battery management system, the power range of the battery can be obtained in real time to timely respond to power changes, preventing the situation of battery over-power, which is beneficial to extending the battery life.

[0125] For the functions of the power control system 300 in the embodiments of the present invention, reference can also be made to the description in Embodiment 1, and the repeated content will not be specifically described again.

[0126] Embodiment 2 of the present invention also provides a power control device for a vehicle. Figure 4 It is a schematic block diagram of the power control device for a vehicle in the embodiments of the present invention. As Figure 4 shown, the control device 400 may include a processor 410 and a memory 420; the memory 420 is coupled to the processor 410. It should be noted that this figure is exemplary; other types of structures can also be used to supplement or replace this structure to implement telecommunication functions or other functions.

[0127] In one embodiment, the processor 410 may be configured to: obtain the power range of the battery, determine the available power range for driving the motor according to the power range; allocate the available power range to a first power range corresponding to the first motor and a second power range corresponding to the second motor according to a preset ratio, and control the first motor and the second motor to operate within the first power range and the second power range; control the first motor and / or the second motor in a first control mode and / or a second control mode, wherein, in the first control mode, when the power range of the battery changes, calculate the difference in the change of the available power range, and allocate the difference in the change of the available power range to the first power range and the second power range according to a preset ratio; in the second control mode, calculate a first parameter range corresponding to the first motor according to the first power range, calculate a second parameter range corresponding to the second motor according to the second power range, and when the first parameter of the first motor exceeds the first parameter range, and / or, the second parameter of the second motor exceeds the second parameter range, perform limit control on the first parameter range and / or the second parameter range.

[0128] In the embodiment of the present invention, the implementation of the functions of the processor 410 may refer to the description of the relevant steps of the vehicle power control method in Embodiment 1, and will not be repeated here.

[0129] The processor 410 is sometimes also referred to as a controller or an operation control, and may include a microprocessor or other processor devices and / or logic devices. The processor 410 receives inputs and controls the operations of the various components of the control device 400. In addition, the processor 410 may also be the overall vehicle controller 301, the first motor controller 302, and the second motor controller 303 of the power control system 300 in Embodiment 2, to implement the function of managing the power of the battery. The processor 410 may be integrated or distributed, and the embodiment of the present invention does not limit this.

[0130] The memory 420 may be, for example, one or more of a buffer, a flash memory, a hard drive, a removable medium, a volatile memory, a non-volatile memory, or other suitable devices. It can store various data, and can also store programs for executing relevant information. And the processor 410 can execute the programs stored in the memory 420 to implement information storage or processing, etc. The functions of other components are similar to those in the prior art and will not be elaborated here. The components of the control device 400 can be implemented by dedicated hardware, firmware, software, or a combination thereof without departing from the scope of the present invention.

[0131] In addition, as Figure 4 shown, the control device 400 may further include: a communication module 430. It should be noted that the control device 400 does not necessarily have to include Figure 4 all the components shown inFigure 4 For components not shown, reference may be made to the related art.

[0132] As can be seen from the above embodiments, by controlling the motor in two control modes, it is possible to prevent the occurrence of battery over-power or to quickly control it even if it occurs, and at the same time prevent over-limitation, and ensure that the two motors maximize the utilization of battery power in an ideal ratio, ensuring the performance of the battery, the safety of vehicle driving, and providing sufficient power performance.

[0133] Embodiment 3

[0134] Embodiment 3 of the present invention provides a vehicle, which includes the power control system of the vehicle described in Embodiment 2. The functions of the power control system of this vehicle can be referred to the description in Embodiment 2, and repeated content will not be specifically described.

[0135] As can be seen from the above embodiments, by controlling the motor in two control modes, it is possible to prevent the occurrence of battery over-power or to quickly control it even if an instantaneous over-power occurs, and at the same time prevent over-limitation, and ensure that the two motors maximize the utilization of battery power in an ideal ratio, ensuring the performance and service life of the battery, the safety of vehicle driving, and providing sufficient power performance.

[0136] The embodiments of the present invention have been described in detail above with reference to the drawings, indicating the ways in which the principles of the present invention can be adopted. However, it should be understood that the implementation of the present invention is not limited to the above embodiments, and also includes all changes, modifications, and equivalents that do not depart from the scope of the gist of the present invention.

Claims

1. A power control method for a vehicle, the vehicle including a first motor and a second motor, characterized in that, The power control method of the vehicle includes: Obtain the power range of the battery, and determine the available power range for driving the motor according to the power range; Allocate the available power range into a first power range corresponding to the first motor and a second power range corresponding to the second motor according to a preset ratio, and control the first motor and the second motor to operate within the first power range and the second power range respectively; The power control method of the vehicle further includes: Control the first motor and / or the second motor in a first control mode and / or a second control mode, wherein, In the first control mode, when the power range of the battery changes, calculate the difference in the change of the available power range, and allocate the difference in the change of the available power range to the first power range and the second power range respectively according to a preset ratio; In the second control mode, calculate a first parameter range corresponding to the first motor according to the first power range, calculate a second parameter range corresponding to the second motor according to the second power range, and when the first parameter of the first motor exceeds the first parameter range, and / or, the second parameter of the second motor exceeds the second parameter range, perform limit control on the first parameter range and / or the second parameter range.

2. The power control method of the vehicle according to claim 1, characterized in that, The vehicle includes a vehicle controller, a first motor controller corresponding to the first motor, and a second motor controller corresponding to the second motor, In the first control mode, the vehicle controller calculates a first torque range and a second torque range according to the changed first power range and second power range, and sends the first torque range and the second torque range to the first motor controller and the second motor controller respectively; The first motor controller and the second motor controller respectively control the output torques of the first motor and the second motor within the first torque range and the second torque range, and / or, in the second control mode, the vehicle controller sends the first parameter range and the second parameter range to the first motor controller and the second motor controller respectively. When the first motor controller and / or the second motor controller determines that the first parameter of the first motor exceeds the first parameter range, and / or, the second parameter of the second motor exceeds the second parameter range, the first motor controller and / or the second motor controller respectively control to lower the first parameter range and / or the second parameter range, and obtain a third torque range of the output torque of the first motor and / or a fourth torque range of the output torque of the second motor based on the lowered first parameter range and / or the second parameter range. The first motor controller and / or the second motor controller respectively control the output torques of the first motor and / or the second motor within the third torque range and / or the fourth torque range.

3. The power control method for a vehicle according to claim 1 or 2, characterized in that the preset ratio is the driving force distribution ratio between the first motor and the second motor.

4. The power control method for a vehicle according to claim 1 or 2, characterized in that the first control mode is implemented in the vehicle's vehicle control unit, and / or the second control mode is implemented in the motor control unit of the first motor and / or the second motor.

5. The power control method for a vehicle according to claim 1 or 2, characterized in that the calculation of the first power range, the second power range, the first parameter range, and the second parameter range is completed in the vehicle's vehicle control unit.

6. The power control method for a vehicle according to claim 1 or 2, characterized in that the first parameter is the first current output by the first motor, and the first parameter range is the first current range, the second parameter is the second current output by the second motor, and the second parameter range is the second current range.

7. The power control method for a vehicle according to claim 6, characterized in that in the second control mode, when the first current exceeds the first current range, the first current range is lowered; and / or when the second current exceeds the second current range, the second current range is lowered.

8. The power control method for a vehicle according to claim 7, characterized in that in the second control mode, a third torque range of the output torque of the first motor is obtained according to the lowered first current range, and the output torque of the first motor is controlled within the third torque range, and / or a fourth torque range of the output torque of the second motor is obtained according to the lowered second current range, and the output torque of the second motor is controlled within the fourth torque range.

9. The power control method for a vehicle according to claim 1, characterized in that the vehicle includes a battery management system, and the power range of the battery is obtained from the battery management system.

10. A power control system for a vehicle, comprising a vehicle control unit, a first motor control unit corresponding to a first motor, and a second motor control unit corresponding to a second motor, characterized in that the vehicle control unit obtains the power range of the battery and determines the available power range for driving the motor according to the power range; the vehicle control unit distributes the available power range according to a preset ratio into a first power range corresponding to the first motor and a second power range corresponding to the second motor; the first motor control unit controls the first motor to operate within the first power range, and the second motor control unit controls the second motor to operate within the second power range; the power control system of the vehicle controls the first motor and / or the second motor in a first control mode and / or a second control mode; In the first control mode, when the vehicle controller determines a change in the power range of the battery, it calculates the difference in the change of the available power range and distributes the difference in the change of the available power range to the first power range and the second power range respectively according to a preset ratio. In the second control mode, the vehicle controller calculates a first parameter range corresponding to the first motor according to the first power range and calculates a second parameter range corresponding to the second motor according to the second power range. When the first motor controller and / or the second motor controller determines that the first parameter of the first motor exceeds the first parameter range and / or the second parameter of the second motor exceeds the second parameter range, the first motor controller and / or the second motor controller performs limit control on the first parameter range and / or the second parameter range.

11. The power control system for a vehicle according to claim 10, wherein In the first control mode, the vehicle controller calculates a first torque range and a second torque range according to the changed first power range and the second power range, and sends the first torque range and the second torque range to the first motor controller and the second motor controller respectively. The first motor controller and the second motor controller respectively control the output torques of the first motor and the second motor to be within the first torque range and the second torque range. And / or, in the second control mode, the vehicle controller sends the first parameter range and the second parameter range to the first motor controller and the second motor controller respectively. When the first motor controller and / or the second motor controller determines that the first parameter of the first motor exceeds the first parameter range and / or the second parameter of the second motor exceeds the second parameter range, the first motor controller and / or the second motor controller respectively controls the first parameter range and / or the second parameter range to be decreased, and obtains a third torque range of the output torque of the first motor and / or a fourth torque range of the output torque of the second motor based on the decreased first parameter range and / or the second parameter range. The first motor controller and / or the second motor controller respectively control the output torques of the first motor and / or the second motor to be within the third torque range and / or the fourth torque range.

12. The power control system for a vehicle according to claim 10 or 11, wherein The preset ratio is the driving force distribution ratio of the first motor and the second motor.

13. The power control system for a vehicle according to claim 10 or 11, wherein The first parameter is the first current output by the first motor, and the first parameter range is the first current range. The second parameter is the second current output by the second motor, and the second parameter range is the second current range.

14. The power control system for a vehicle according to claim 13, wherein When the first motor controller determines that the first current exceeds the first current range, the first current range is lowered; and / or, when the second motor controller determines that the second current exceeds the second current range, the second current range is lowered.

15. The power control system of a vehicle according to claim 10 or 11, wherein the power control system of the vehicle includes a battery management system, and the vehicle controller obtains the power range of the battery from the battery management system.

16. A vehicle, characterized in that, The vehicle includes the power control system of the vehicle according to any one of claims 10 to 15.

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