Power distribution method, device, vehicle and storage medium for electric vehicle

Abstract

An embodiment of the present application discloses a power distribution method, device, vehicle, and storage medium for an electric vehicle. Among them, the method includes: determining the current maximum discharge power of a high-voltage battery in the electric vehicle and the current actual consumption power of vehicle electrical functions; in the case where the current maximum discharge power does not satisfy the power distribution of the vehicle electrical functions according to the state of the current actual consumption power, determining the maximum consumption power of each electrical function at the next moment based on the current maximum discharge power and the priority of each electrical function in the vehicle electrical functions, where the priority is obtained based on the safety and comfort of the electrical function; controlling the actual consumption power of each electrical function at the next moment based on the maximum consumption power of each electrical function at the next moment.

Description

Technical Field

[0001] The present application relates to, but is not limited to, the field of new energy vehicles, and particularly relates to a power distribution method, device, vehicle and storage medium for an electric vehicle. Background Art

[0002] The power distribution of each function of an electric vehicle is related to both the driver's experience requirements and the overall vehicle safety management. Only focusing on the driver's experience requirements will affect the overall vehicle safety management, and conservative overall vehicle safety management is likely to ignore the driver's experience requirements. Therefore, a strategy is needed to optimize the balance between the driver's experience requirements and the overall vehicle safety management.

[0003] Current power distribution of electric vehicles gives more consideration to the overall vehicle safety management requirements, and the driver's experience requirements are placed at a very low priority. In the case where electric vehicles are increasingly focusing on the sense of experience, this traditional power distribution method obviously cannot meet the continuously improving experience requirements of users. Summary of the Invention

[0004] In view of this, embodiments of the present application at least provide a power distribution method, device, vehicle and storage medium for an electric vehicle.

[0005] The technical solution of the embodiments of the present application is implemented as follows:

[0006] In a first aspect, an embodiment of the present application provides a power distribution method for an electric vehicle, the method including: determining a current maximum discharge power of a high-voltage battery in the electric vehicle and a current actual consumption power of each vehicle electrical function; in a case where the current maximum discharge power does not satisfy power distribution of the vehicle electrical functions according to the current actual consumption power, determining a maximum consumption power of each electrical function at the next moment based on the current maximum discharge power and the priority of each electrical function in the vehicle electrical functions, where the priority is obtained based on the safety and comfort of the electrical function; and controlling the actual consumption power of each electrical function at the next moment based on the maximum consumption power of each electrical function at the next moment.

[0007] In a second aspect, an embodiment of the present application provides a power distribution device for an electric vehicle. The device includes: a first determination module configured to determine the current maximum discharge power of a high-voltage battery in the electric vehicle and the current actual power consumption of the vehicle's electrical functions; a second determination module configured to, when the current maximum discharge power does not meet the power distribution for the vehicle's electrical functions according to the current actual power consumption, determine the maximum power consumption of each electrical function at the next moment based on the current maximum discharge power and the priority of each electrical function in the vehicle's electrical functions, where the priority is obtained based on the safety and comfort of the electrical function; and a control module configured to control the actual power consumption of each electrical function at the next moment based on the maximum power consumption of each electrical function at the next moment.

[0008] In a third aspect, an embodiment of the present application provides a vehicle, including a memory and a processor. The memory stores a computer program that can run on the processor, and when the processor executes the program, it implements some or all of the steps in the above method.

[0009] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, it implements some or all of the steps in the above method.

[0010] In the embodiments of the present application, first, the current maximum discharge power of the high-voltage battery in the electric vehicle and the current actual power consumption of the vehicle's electrical functions are determined; second, when the current maximum discharge power does not meet the power distribution for the vehicle's electrical functions according to the current actual power consumption, the maximum power consumption of each electrical function at the next moment is determined based on the current maximum discharge power and the priority of each electrical function in the vehicle's electrical functions, where the priority is obtained based on the safety and comfort of the electrical function; and finally, the actual power consumption of each electrical function at the next moment is controlled based on the maximum power consumption of each electrical function at the next moment. It can be seen that when the current maximum discharge power does not meet the power distribution for the vehicle's electrical functions according to the current actual power consumption, the maximum power consumption of each electrical function at the next moment is determined based on the priority of the safety and comfort of the electrical function. Therefore, the distributed power can meet the user's experience needs as much as possible on the basis of meeting the safety requirements, achieving a balance between the user's experience needs and the vehicle's safety management.

[0011] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and do not limit the technical solutions of the present disclosure. Description of the Drawings

[0012] The accompanying drawings here are incorporated into the specification and constitute a part of this specification. These drawings illustrate embodiments consistent with the present application and, together with the specification, are used to explain the technical solutions of the present application.

[0013] Figure 1 It is a schematic diagram of the implementation process of a power distribution method for an electric vehicle provided by an embodiment of the present application;

[0014] Figure 2 It is a schematic diagram of the implementation process of another power distribution method for an electric vehicle provided by an embodiment of the present application;

[0015] Figure 3 It is a schematic diagram of the implementation process of a step S301 provided by an embodiment of the present application;

[0016] Figure 4A It is a schematic diagram of the implementation process of determining a comfort management function provided by an embodiment of the present application;

[0017] Figure 4B It is a schematic diagram of the implementation process of another determination of the comfort management function provided by an embodiment of the present application;

[0018] Figure 5 It is a schematic diagram of the implementation process of another power distribution method for an electric vehicle provided by an embodiment of the present application;

[0019] Figure 6 It is a schematic diagram of the composition structure of a power distribution device for an electric vehicle provided by an embodiment of the present application;

[0020] Figure 7 It is a schematic diagram of the hardware entity of a vehicle provided by an embodiment of the present application. Specific Embodiments

[0021] In order to make the objectives, technical solutions, and advantages of the present application clearer, the technical solutions of the present application will be further elaborated in detail below in conjunction with the accompanying drawings and embodiments. The described embodiments should not be regarded as limitations on the present application. All other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present application.

[0022] In the following description, reference is made to "some embodiments", which describe a subset of all possible embodiments. However, it can be understood that "some embodiments" can be the same subset or different subsets of all possible embodiments and can be combined with each other without conflict.

[0023] The terms "first / second / third" involved herein are only used to distinguish similar objects and do not represent a specific order for the objects. Understandably, "first / second / third" can be interchanged with a specific order or sequence when allowed, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used herein are for the purpose of describing this application only and are not intended to limit this application.

[0025] Embodiments of the present application provide a power distribution method for an electric vehicle, as Figure 1 shown, the method includes the following steps S101 to step S103:

[0026] Step S101: Determine the current maximum discharge power of the high-voltage battery in the electric vehicle and the current actual consumption power of the vehicle's power-consuming functions.

[0027] Here, the high-voltage battery is used to provide power for the high-voltage operation of the vehicle.

[0028] The vehicle's power-consuming functions refer to all power-consuming functions in the current state of the vehicle.

[0029] The current maximum discharge power of the high-voltage battery in the electric vehicle and the current actual consumption power of the vehicle's power-consuming functions can be obtained through the battery management system.

[0030] Step S102: In the case where the current maximum discharge power does not satisfy the power distribution of the vehicle's power-consuming functions according to the current actual consumption power, based on the current maximum discharge power and the priority of each power-consuming function in the vehicle's power-consuming functions, determine the maximum consumption power of each power-consuming function at the next moment, where the priority is obtained based on the safety and comfort of the power-consuming function.

[0031] Generally, the battery will reserve a part of the safety reserve power during the discharge process, such as 10% of the power, etc., to protect the battery life. When the difference between the current maximum discharge power and the current actual consumption power of the vehicle's power-consuming functions is less than the safety reserve power, it is considered that the current maximum discharge power does not satisfy the power distribution of the vehicle's power-consuming functions according to the current actual consumption power, that is, the current power distribution state needs to be adjusted.

[0032] Here, the vehicle's power consumption functions may include a safety management function and a comfort management function. Since the priority is obtained based on the safety and comfort of the power consumption functions, in some embodiments, the priority of the safety management function may be higher than that of the comfort management function. During implementation, according to the current maximum discharge power, the power for the safety management function can be preferentially satisfied, and then the power for the comfort management function. For example, taking the current maximum discharge power as the maximum consumption power of the safety management function, and then based on the current actual consumption power of the safety management function, taking the difference between the current maximum discharge power and the current actual consumption power of the safety management function as the maximum consumption power of the comfort management function, so as to satisfy the user's experience needs as much as possible on the basis of meeting the safety requirements.

[0033] Step S103: Based on the maximum consumption power of each power consumption function at the next moment, control the actual consumption power of each power consumption function at the next moment.

[0034] During implementation, the maximum consumption power of each power consumption function at the next moment can be sent to the corresponding function controller through the Controller Area Network, and the corresponding function controller controls its power consumption so that it does not exceed the allocated maximum consumption power.

[0035] In the embodiments of the present application, first, determine the current maximum discharge power of the high-voltage battery in the electric vehicle and the current actual consumption power of the vehicle's power consumption functions; second, when the current maximum discharge power does not meet the power distribution of the vehicle's power consumption functions according to the current actual consumption power state, based on the current maximum discharge power and the priority of each power consumption function in the vehicle's power consumption functions, determine the maximum consumption power of each power consumption function at the next moment, where the priority is obtained based on the safety and comfort of the power consumption functions; finally, based on the maximum consumption power of each power consumption function at the next moment, control the actual consumption power of each power consumption function at the next moment. It can be seen that when the current maximum discharge power does not meet the power distribution of the vehicle's power consumption functions according to the current actual consumption power state, the maximum consumption power of each power consumption function at the next moment is determined based on the priority of the safety and comfort of the power consumption functions. Therefore, the allocated power can satisfy the user's experience needs as much as possible on the basis of meeting the safety requirements, achieving a balance between the user experience needs and the vehicle safety management.

[0036] In some embodiments, as Figure 2 shown, the method further includes the following steps S201 to S204:

[0037] Step S201: When the current maximum discharge power satisfies the power distribution of the vehicle's electricity-using functions according to the state of the current actual consumption power, for each electricity-using function in the vehicle's electricity-using functions, determine the consumed power in the current change duration and the consumed power in the previous preset duration.

[0038] Here, the current maximum discharge power satisfies the power distribution of the vehicle's electricity-using functions according to the state of the current actual consumption power, that is, the power distribution can continue according to the state of the current actual consumption power.

[0039] The current change duration refers to the current time step, such as Delta T. The previous preset duration refers to the preset duration before the current moment. In some embodiments, the previous preset duration can be greater than the current change duration. During implementation, a time window T before the current moment can be selected first filter , then the previous preset duration can be T filter -Delta T; in some embodiments, the previous preset duration can also be T filter , and the embodiments of the present application do not limit the setting method of the previous preset duration.

[0040] Step S202: Determine the total duration by adding the change duration and the preset duration.

[0041] Step S203: Based on the consumed power in the current change duration, the consumed power in the previous preset duration, and the total duration, determine the consumed power in the next change duration.

[0042] In some embodiments, the sliding average algorithm can be used to obtain the consumed power in the next change duration. The method for determining the consumed power in the next change duration can be seen in the following formula:

[0043]

[0044] Among them, P next is the consumed power in the next change duration, Wcur is the consumed power in the current change duration, Tfilter-Delta T is the previous preset duration, Tfilter is the total duration; Pold is the consumed power in the previous preset duration.

[0045] Step S204: Determine the maximum consumed power of the corresponding electricity-using function as the consumed power in the next change duration.

[0046] In the embodiments of the present application, when the current maximum discharge power satisfies the power distribution of the vehicle's electricity-using functions according to the state of the current actual consumption power, the sliding average algorithm is used to obtain the consumed power in the next change duration, which can eliminate the influence of the accidental power mutation at the moment of function turning on and off.

[0047] In some embodiments, the vehicle power consumption functions include a safety management function. The implementation of step S102, "Based on the current maximum discharge power and the priority of each power consumption function in the vehicle power consumption functions, determine the maximum consumption power of each power consumption function at the next moment," includes the following steps S301:

[0048] Step S301: Determine the current maximum discharge power as the maximum consumption power of the safety management function at the next moment;

[0049] That is, all the current maximum discharge power can be used for the consumption of the safety management function at the next moment to prioritize the power consumption of the safety management function and ensure the safe driving of the vehicle.

[0050] In some embodiments, the vehicle power consumption functions include a safety management function and a comfort management function, and the priority of the safety management function is higher than that of the comfort management function. The implementation of step S102, "Based on the current maximum discharge power and the priority of each power consumption function in the vehicle power consumption functions, determine the maximum consumption power of each power consumption function at the next moment," includes the following steps S302 and S303:

[0051] Step S302: Determine the current actual consumption power of the safety management function;

[0052] Step S303: Determine the first difference between the current maximum discharge power and the current actual consumption power of the safety management function as the maximum consumption power of the comfort management function at the next moment.

[0053] That is, first, estimate the actual consumption power of the safety management function at the next moment through the current actual consumption power of the safety management function, and then subtract the current actual consumption power of the safety management function from the current maximum discharge power to obtain the maximum consumption power of the comfort management function at the next moment, so as to maximize the power consumption of the comfort management function on the basis of ensuring the safety management function.

[0054] In some embodiments, as Figure 3 shown, the safety management function includes: a DC converter function and a safety thermal management function. Then, the implementation of step S301, "Determine the current maximum discharge power as the maximum consumption power of the safety management function at the next moment," includes the following steps S3011 to S3013:

[0055] Step S3011: Determine the current maximum discharge power as the maximum consumption power of the DC converter function at the next moment;

[0056] Here, the safety thermal management function includes functions such as defogging and defrosting. Since the DC converter function is used to convert the current into the required current magnitude for component use, the power of the DC converter function needs to be ensured first. Therefore, the current maximum discharge power is determined as the maximum consumption power of the DC converter function at the next moment to meet the requirements of the DC converter function as much as possible.

[0057] Step S3012: Determine the current actual consumption power of the DC converter function;

[0058] Step S3013: Determine the second difference between the current maximum discharge power and the current actual consumption power of the DC converter function as the maximum consumption power of the safety thermal management function at the next moment.

[0059] Here, the current actual consumption power of the DC converter function is used to estimate the actual consumption power of the DC converter function at the next moment. The current maximum discharge power is subtracted from the current actual consumption power of the DC converter function to obtain the second difference, which is used as the maximum consumption power of the safety thermal management function at the next moment to achieve using the current maximum discharge power as the maximum consumption power of the safety management function at the next moment. At the same time, within the safety management function, according to the priority, the important part that needs to be satisfied first is satisfied first, and then the secondary part is satisfied, so as to realize the power distribution of the vehicle internal safety management function according to the priority.

[0060] In some embodiments, the comfort management function includes a driving function and a comfort thermal management function. The implementation of step S303 "Determine the first difference between the current maximum discharge power and the current actual consumption power of the safety management function as the maximum consumption power of the comfort management function at the next moment" includes the following steps S3031 and S3032:

[0061] Step S3031: Based on the first difference between the current maximum discharge power and the current actual consumption power of the safety management function, determine the power distribution state;

[0062] Here, the driving function includes a motor driving function. The comfort thermal management function includes: air conditioning cooling and heating functions, seat heating functions, etc. The power distribution state includes two states: the first difference can simultaneously meet the minimum requirements of each power-consuming function in the comfort management function and the first difference cannot simultaneously meet the minimum requirements of each power-consuming function in the comfort management function.

[0063] In some embodiments, the power distribution state can be determined according to the magnitude of the first difference. For example, if the first difference is less than a threshold value, such as 5% of the battery power, it indicates that the power distribution state is such that the first difference cannot simultaneously meet the minimum requirements of each power-consuming function in the comfort management function. At this time, the battery power is too low to simultaneously meet the minimum requirements of each power-consuming function. If the first difference is greater than or equal to the threshold value, it indicates that the power distribution state is such that the first difference can simultaneously meet the minimum requirements of each power-consuming function in the comfort management function, and each power-consuming function can be in an operating state.

[0064] Step S3032: When the power distribution state indicates that the first difference can simultaneously meet the minimum requirements of each power-consuming function in the comfort management function, based on the acquired ambient temperature and the vehicle acceleration, respectively determine the maximum power consumption of the driving function and the comfort thermal management function at the next moment.

[0065] Here, if the ambient temperature is low and the acceleration is high, or the ambient temperature is high and the acceleration is low, the comfort requirements of the user should be satisfied first, and then the driving requirements. If the ambient temperature is high and the acceleration is high, or the ambient temperature is low and the acceleration is low, the driving requirements should be satisfied first, and then the comfort requirements of the user. Therefore, the maximum power consumption of the driving function and the comfort thermal management function at the next moment can be determined according to the ambient temperature and the vehicle acceleration.

[0066] In some embodiments, as Figure 4A shown, the implementation of step S3032 can include the following steps S401 to S404:

[0067] Step S401: Acquire the ambient temperature and the vehicle acceleration;

[0068] Here, the ambient temperature can be acquired by a temperature sensor; the vehicle acceleration can be acquired by an acceleration sensor.

[0069] Step S402: Based on the ambient temperature and the vehicle acceleration, determine a correction coefficient for the maximum power consumption;

[0070] Here, the correction coefficient is used to adjust the distribution ratio of the maximum power consumption of the driving function and the comfort thermal management function at the next moment in the first difference. The correction coefficient is a value between 0 and 1.

[0071] When the temperature is low and the acceleration is low, the higher the correction coefficient, the more power allowed by the driving function. At this time, the driving demand is the main consideration with user comfort as a supplement; when the temperature is low and the acceleration is high, the lower the correction coefficient, the more power allowed by the comfort thermal management function. At this time, user comfort is the main consideration with the driving demand as a supplement, because it will be very cold at low temperatures if the power of the comfort thermal management function is insufficient at high speeds. When the temperature is high and the acceleration is low, the lower the correction coefficient, the more power allowed by the comfort thermal management function. At this time, user comfort is the main consideration with the driving demand as a supplement, because it will be very hot at high temperatures if the power of the comfort thermal management is insufficient; when the temperature is high and the acceleration is high, the higher the correction coefficient, the more power allowed by the driving function. At this time, the driving demand is the main consideration with user comfort as a supplement.

[0072] In some embodiments, a relationship table between the ambient temperature, vehicle acceleration, and correction coefficient can be established. Then, the implementation of step S402 can obtain the correction coefficient by looking up the table based on the obtained ambient temperature and vehicle acceleration.

[0073] Step S403: Determine the product of the correction coefficient of the maximum power consumption and the first difference as the maximum power consumption of the driving function at the next moment;

[0074] That is, the maximum power consumption of the driving function at the next moment = correction coefficient * first difference.

[0075] Step S404: Determine the difference between the first difference and the maximum power consumption of the driving function at the next moment as the maximum power consumption of the comfort thermal management function at the next moment.

[0076] That is, the maximum power consumption of the comfort thermal management function at the next moment = first difference - correction coefficient * first difference = (1 - correction coefficient) * first difference.

[0077] In the embodiments of the present application, the ambient temperature and vehicle acceleration are used to determine the distribution ratio of the maximum power consumption of the driving function and the comfort thermal management function at the next moment in the first difference, that is, the correction coefficient, so as to simultaneously consider comfort and vehicle speed.

[0078] In some embodiments, as Figure 4B shown, in the case where the power distribution state indicates that the first difference cannot simultaneously meet the minimum requirements of each power-consuming function in the comfort management function, the method further includes the following steps S501 to S503:

[0079] Step S501: Determine the first difference as the maximum power consumption of the driving function at the next moment;

[0080] That is, when the first difference cannot simultaneously meet the minimum requirements of each power-consuming function in the comfort management function, the driving function is preferentially satisfied so that the driver can drive the vehicle to a nearby charging station for charging at low power. Therefore, the first difference is determined as the maximum power consumption of the driving function at the next moment.

[0081] Step S502: Determine the current actual power consumption of the driving function;

[0082] Step S503: Determine the third difference between the first difference and the current actual power consumption of the driving function as the maximum power consumption of the comfort thermal management function at the next moment.

[0083] That is, the actual power consumption of the driving function at the next moment is predicted through the current actual power consumption of the driving function, and the remaining part of the first difference except the current actual power consumption of the driving function is used as the maximum power consumption of the comfort thermal management function at the next moment.

[0084] In the embodiment of the present application, when the first difference cannot simultaneously meet the minimum requirements of each power-consuming function in the comfort management function, the first difference is determined as the maximum power consumption of the driving function at the next moment to preferentially satisfy the driving function and then satisfy the comfort thermal function, so that the driver can drive the vehicle to a nearby charging station for charging at low power.

[0085] The source of the total power consumption of the electric vehicle is the discharge power of the high-voltage battery, and the goal of power distribution is how to efficiently and reasonably distribute the discharge power of the high-voltage battery. The power distribution method provided by the embodiment of the present application includes two stages: a prediction stage (that is, the case where the current maximum discharge power satisfies the power distribution of the vehicle's power-consuming functions according to the current actual power consumption state) and a rule stage (that is, the case where the current maximum discharge power does not satisfy the power distribution of the vehicle's power-consuming functions according to the current actual power consumption state). Among them, the power distribution in the prediction stage adopts a prediction-based method, which can not only fully meet the needs of the driver experience but also meet the needs of the vehicle's safety management; the distribution in the rule stage considers the priority of the vehicle's power-consuming functions.

[0086] Prediction stage: Use the current function power consumption and the total power consumed in the past period of time to predict the power consumption in the next period of time, and send this predicted power as the maximum allowable power (that is, the above-mentioned maximum power consumption) of the function to the corresponding function controller. In this stage, the power distribution of the function does not need to perform a rule-based priority judgment first, so that both the comfort needs of the driver and the driving needs of the driver can be immediately met, and the safety management needs of the vehicle can also be ensured.

[0087] Rule stage: The vehicle's electrical functions are divided into driver experience demand functions (i.e., the above-mentioned comfort management functions) (including: comfort thermal management functions and drive functions) and vehicle safety management functions (i.e., the above-mentioned safety management functions) (including: DCDC DC converter functions and safety thermal management functions); The power distribution in the rule stage is carried out according to the following priorities: The vehicle safety management function has a higher priority than the driver experience demand function; that is, the vehicle's electrical power is first used for the vehicle safety management function, and the remaining part is allocated to the experience demand function.

[0088] The technical solutions adopted are as follows:

[0089] 1. Calculate the sum of the power consumption of the current vehicle electrical functions, including driver experience demand functions and vehicle safety management functions:

[0090] Driver experience demand functions include:

[0091] (A) Comfort thermal management functions: air conditioning cooling and heating; seat heating;

[0092] (B) Drive functions: motor drive;

[0093] Vehicle safety management functions include:

[0094] (A) DCDC DC converter functions;

[0095] (B) Safety thermal management functions (defrosting; defogging);

[0096] 2. Calculate the power reserve value in the distribution stage

[0097] The power reserve value in the distribution stage = the maximum discharge power of the high-voltage battery minus the sum of the power consumption of the vehicle electrical functions (i.e., the current actual power consumption of the above-mentioned vehicle electrical functions);

[0098] 3. Judgment in the distribution stage

[0099] If the power reserve value in the distribution stage is greater than or equal to the safety reserve value in the distribution stage (software parameters can be adjusted), it is determined to enter the prediction stage.

[0100] If the power reserve value in the distribution stage is less than the safety reserve value in the distribution stage (software parameters can be adjusted), it is determined to enter the rule stage.

[0101] 4. Power distribution in the prediction stage

[0102] The driver experience demand functions and vehicle safety management functions respectively calculate their predicted powers according to the following moving average algorithm, and use the obtained predicted powers as the maximum allowable use powers for the relevant functions, and send them to the corresponding function controllers through the controller area network. The corresponding function controllers control their power consumption to make it not exceed the allocated maximum allowable use power.

[0103] Example: Prediction of the maximum allowable power consumption of the DCDC DC converter function:

[0104]

[0105] where P next : Predicted power consumption after the next Delta T time (i.e., the power consumption within the next change duration mentioned above), unit: watt (W);

[0106] Wcur: Actual electrical energy consumed after the current Delta T time (i.e., the power consumption within the previous change duration mentioned above), unit: watt-second (WS);

[0107] Pold: Power consumption after the previous Tfilter - Delta T time (i.e., the power consumption within the previous preset duration mentioned above), unit: W;

[0108] Tfilter: Time window (i.e., the total duration mentioned above);

[0109] Delta T: Time step (i.e., the change duration mentioned above).

[0110] This algorithm can predict the power consumption in the next time period in real time and eliminate the influence of accidental factors on power distribution. The same algorithm is used for predicting the maximum allowable power consumption of the remaining driver experience demand functions and vehicle safety management functions.

[0111] 5. Power distribution in the rule stage:

[0112] The driver experience demand functions and vehicle safety management functions calculate the maximum allowable power consumption of the relevant functions according to the following algorithms respectively, and send them to the corresponding function controllers through the controller area network. The corresponding function controllers control their power consumption to make it not exceed the allocated maximum allowable power consumption.

[0113] (1) The power of the vehicle safety management function is distributed as follows:

[0114] (A) The maximum allowable power consumption of the DCDC DC converter function = the maximum discharge power of the current high-voltage battery;

[0115] (B) The maximum allowable power consumption of the safety thermal management function = the maximum discharge power of the current high-voltage battery minus the actual power consumption of the DCDC DC converter function (i.e., the current actual power consumption of the DC converter function);

[0116] (2) Calculate the power reserve value in the rule stage

[0117] Power reserve value in the rule stage (i.e., the first difference above) = maximum discharge power of the current high-voltage battery minus the actual power consumption of the vehicle safety management function (i.e., the current actual power consumption of the safety management function);

[0118] (3) Rule stage determination

[0119] When the power reserve value in the rule stage is greater than or equal to the safety reserve value in the rule stage (software parameters can be adjusted), enter the correction factor allocation stage (i.e., the above power distribution state indicates the situation where the first difference can simultaneously meet the minimum requirements of each power-consuming function in the comfort management function);

[0120] When the power reserve value in the rule stage is less than the safety reserve value in the rule stage (software parameters can be adjusted), enter the priority allocation stage (i.e., the above power distribution state indicates the situation where the first difference cannot simultaneously meet the minimum requirements of each power-consuming function in the comfort management function);

[0121] (4) Correction factor allocation stage

[0122] For the drive function and the comfort thermal management function in the driving experience demand function, power is distributed according to the correction factor, and the correction factor is obtained by looking up the table based on the ambient temperature and the vehicle longitudinal acceleration (maximum 1; minimum 0).

[0123] (A) Maximum allowable power of the drive function = correction factor multiplied by the power reserve value in the rule stage;

[0124] (B) Maximum allowable power of the comfort thermal management function = (1 - correction factor) multiplied by the power reserve value in the rule stage.

[0125] When it is low temperature and the acceleration is low, the higher the correction factor, the more drive allowable power (driver comfort is secondary and drive demand is primary); when it is low temperature and the acceleration is high, the lower the correction factor, the more comfort thermal management allowable power (driver comfort is primary and drive demand is secondary; because when the comfort thermal management power is insufficient at high speed, it is very cold at low temperature). When it is high temperature and the acceleration is low, the lower the correction factor, the more comfort thermal management allowable power (driver comfort is primary and drive demand is secondary, if the comfort thermal management power is insufficient, it is very hot at high temperature); when it is high temperature and the acceleration is high, the higher the correction factor, the more drive function allowable power (driver comfort is secondary and drive demand is primary).

[0126] (5) Priority allocation stage

[0127] (A) Maximum allowable power of the drive function = power reserve value in the rule stage;

[0128] (B) Maximum allowable power of the comfort thermal management function = power reserve value in the rule stage minus the actual power consumption of the drive function;

[0129] Fully satisfy the driving requirements first, and allocate the remaining part to the comfort requirements; ensure that the driver can drive the vehicle to a nearby charging station at low power.

[0130] Advantages of the embodiments of the present application:

[0131] 1. Divide the power distribution of the electric vehicle into a prediction stage and a rule stage. In the prediction stage, the power distribution does not need to perform a rule-based priority judgment first, so that both the driver's comfort requirements and the driver's driving requirements can be immediately satisfied, and the safety management requirements of the whole vehicle can also be ensured.

[0132] 2. Further divide the power distribution in the rule stage into a correction coefficient distribution stage and a priority distribution stage; in the correction coefficient distribution stage, the power requirements of the driving function and the comfort thermal management function can be taken into account, and the driving experience of the whole vehicle at low power can be improved.

[0133] 3. Introduce the moving average algorithm into the power distribution of electric vehicles, so that the power distribution in the prediction stage can take into account the driver experience requirement function and the safety management function of the whole vehicle, and can eliminate the influence of accidental power mutations at the moment of function turning on and off.

[0134] As Figure 5 shown, the embodiments of the present application also provide a power distribution method, which includes the following steps S601 to step S612:

[0135] Step S601: Calculate the power reserve value in the distribution stage;

[0136] The power reserve value in the distribution stage = the maximum discharge power of the high-voltage battery minus the sum of the power consumptions of the whole vehicle's electrical functions.

[0137] Step S602: Whether the power reserve value in the distribution stage is greater than the safety reserve value in the distribution stage. If so, execute step S603; if not, execute step S605;

[0138] Step S603: Enter the prediction stage;

[0139] Step S604: Use the moving average algorithm to calculate the maximum allowable use power of the following functions:

[0140] 1. Comfort thermal management function;

[0141] 2. Driving function;

[0142] 3. DCDC DC converter function;

[0143] 4. Safety thermal management function.

[0144] Step S605: Enter the rule stage;

[0145] Step S606: Maximum allowable power of the vehicle safety management function:

[0146] 1. The maximum allowable power of the DCDC DC converter function = the maximum discharge power of the current high-voltage battery;

[0147] 2. The maximum allowable power of the safety thermal management function = the maximum discharge power of the current high-voltage battery minus the actual power consumption of the DCDC DC converter function.

[0148] Step S607: Calculate the power reserve value in the rule phase;

[0149] Step S608: Whether the power reserve value in the rule phase is greater than or equal to the safety reserve value in the rule phase; if so, execute Step S609, if not, execute Step S611;

[0150] Step S609: Enter the correction factor allocation phase;

[0151] Step S610: Maximum allowable power of the driving experience function:

[0152] 1. The maximum allowable power of the driving function = the correction factor multiplied by the power reserve value in the rule phase;

[0153] 2. The maximum allowable power of the comfort thermal management function = (1 - the correction factor) multiplied by the power reserve value in the rule phase.

[0154] Step S611: Enter the priority allocation phase;

[0155] Step S612: Maximum allowable power of the driving experience function:

[0156] 1. The maximum allowable power of the driving function = the power reserve value in the rule phase;

[0157] 2. The maximum allowable power of the comfort thermal management function = the power reserve value in the rule phase minus the actual power consumption of the driving function.

[0158] Based on the foregoing embodiments, an embodiment of the present application provides a data processing device, which includes each unit included and each module included in each unit, and can be implemented by a processor in a computer device; of course, it can also be implemented by specific logic circuits; in the implementation process, the processor can be a central processing unit (CPU), a microprocessor unit (MPU), a digital signal processor (DSP), or a field programmable gate array (FPGA), etc.

[0159] Figure 6 The following is a schematic diagram of the composition structure of a power distribution device for an electric vehicle provided by an embodiment of the present application. As Figure 6 shown, the power distribution device 600 of the electric vehicle includes: a first determination module 610, a second determination module 620, and a control module 630, where:

[0160] The first determination module 610 is configured to determine the current maximum discharge power of the high-voltage battery in the electric vehicle and the current actual consumption power of the vehicle's electricity-consuming functions.

[0161] The second determination module 620 is configured to, when the current maximum discharge power does not satisfy the power distribution of the vehicle's electricity-consuming functions according to the state of the current actual consumption power, determine the maximum consumption power of each electricity-consuming function at the next moment based on the current maximum discharge power and the priority of each electricity-consuming function in the vehicle's electricity-consuming functions, where the priority is obtained based on the safety and comfort of the electricity-consuming function.

[0162] The control module 630 is configured to control the actual consumption power of each electricity-consuming function at the next moment based on the maximum consumption power of each electricity-consuming function at the next moment.

[0163] In some embodiments, the device further includes: a third determination module, configured to, when the current maximum discharge power satisfies the power distribution of the vehicle's electricity-consuming functions according to the state of the current actual consumption power, determine the power consumption within the current change duration and the power consumption within the previous preset duration for each electricity-consuming function in the vehicle's electricity-consuming functions; a fourth determination module, configured to determine the sum of the change duration and the preset duration as the total duration; a fifth determination module, configured to determine the consumption power within the next change duration based on the power consumption within the current change duration, the power consumption within the previous preset duration, and the total duration; a sixth determination module, configured to determine the consumption power within the next change duration as the maximum consumption power of the corresponding electricity-consuming function.

[0164] In some embodiments, the vehicle's electricity-consuming functions include a safety management function, and the second determination module is further configured to determine the current maximum discharge power as the maximum consumption power of the safety management function at the next moment; and / or, the vehicle's electricity-consuming functions include a safety management function and a comfort management function, and the priority of the safety management function is higher than the priority of the comfort management function. The second determination module is further configured to determine the current actual consumption power of the safety management function; and determine the first difference between the current maximum discharge power and the current actual consumption power of the safety management function as the maximum consumption power of the comfort management function at the next moment.

[0165] In some embodiments, the security management function includes: a DC converter function and a security thermal management function. The second determination module includes: a first determination sub-module, configured to determine the current maximum discharge power as the maximum power consumption of the DC converter function at the next moment; a second determination sub-module, configured to determine the current actual power consumption of the DC converter function; a third determination sub-module, configured to determine the second difference between the current maximum discharge power and the current actual power consumption of the DC converter function as the maximum power consumption of the security thermal management function at the next moment.

[0166] In some embodiments, the comfort management function includes a driving function and a comfort thermal management function. The second determination module includes: a fourth determination sub-module, configured to determine a power distribution state based on the first difference between the current maximum discharge power and the current actual power consumption of the security management function; a fifth determination sub-module, configured to, when the power distribution state indicates that the first difference can simultaneously meet the minimum requirements of each power-consuming function in the comfort management function, determine the maximum power consumption of the driving function and the comfort thermal management function at the next moment respectively based on the obtained ambient temperature and the acceleration of the vehicle.

[0167] In some embodiments, the fifth determination sub-module includes: an acquisition unit, configured to acquire the ambient temperature and the acceleration of the vehicle; a first determination unit, configured to determine a correction coefficient of the maximum power consumption based on the ambient temperature and the acceleration of the vehicle; a second determination unit, configured to determine the product of the correction coefficient of the maximum power consumption and the first difference as the maximum power consumption of the driving function at the next moment; a third determination unit, configured to determine the difference between the first difference and the maximum power consumption of the driving function at the next moment as the maximum power consumption of the comfort thermal management function at the next moment.

[0168] In some embodiments, when the power distribution state indicates that the first difference cannot simultaneously meet the minimum requirements of each power-consuming function in the comfort management function, the device further includes:

[0169] A seventh determination module, configured to determine the first difference as the maximum power consumption of the driving function at the next moment; an eighth determination module, configured to determine the current actual power consumption of the driving function; a ninth determination module, configured to determine the third difference between the first difference and the current actual power consumption of the driving function as the maximum power consumption of the comfort thermal management function at the next moment.

[0170] The description of the above device embodiments is similar to that of the above method embodiments and has similar beneficial effects to those of the method embodiments. In some embodiments, the functions or modules included in the device provided by the embodiments of the present disclosure can be used to execute the methods described in the above method embodiments. For technical details not disclosed in the device embodiments of the present application, please refer to the description of the method embodiments of the present application for understanding.

[0171] It should be noted that in the embodiments of the present application, if the above power distribution method for electric vehicles is implemented in the form of software function modules and sold or used as an independent product, it can also be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the embodiments of the present application, in essence, or the part that contributes to the related technology, can be embodied in the form of a software product. The software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the methods described in the various embodiments of the present application. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROMs), magnetic disks, or optical discs that can store program codes. In this way, the embodiments of the present application are not limited to any specific hardware, software, or firmware, or any combination of hardware, software, and firmware.

[0172] The embodiments of the present application provide a vehicle, including a memory and a processor. The memory stores a computer program that can run on the processor, and when the processor executes the program, some or all of the steps in the above method are implemented.

[0173] The embodiments of the present application provide a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, some or all of the steps in the above method are implemented. The computer-readable storage medium can be transient or non-transient.

[0174] The embodiments of the present application provide a computer program, including computer-readable code. When the computer-readable code runs in a computer device, the processor in the computer device executes to implement some or all of the steps in the above method.

[0175] An embodiment of the present application provides a computer program product, which includes a non-transitory computer-readable storage medium storing a computer program. When the computer program is read and executed by a computer, some or all of the steps in the above method are implemented. The computer program product can be specifically implemented in a manner of hardware, software, or a combination thereof. In some embodiments, the computer program product is specifically embodied as a computer storage medium. In other embodiments, the computer program product is specifically embodied as a software product, such as a Software Development Kit (SDK), etc.

[0176] It should be noted here that: the descriptions of the above embodiments tend to emphasize the differences between the embodiments, and their similarities can be referred to each other. The descriptions of the above embodiments of the device, storage medium, computer program, and computer program product are similar to the descriptions of the above method embodiments and have similar beneficial effects to the method embodiments. For the technical details not disclosed in the embodiments of the device, storage medium, computer program, and computer program product of the present application, please refer to the descriptions of the method embodiments of the present application for understanding.

[0177] It should be noted that Figure 7 is a schematic diagram of the hardware entity of a vehicle provided by an embodiment of the present application. As Figure 7 shown, the hardware entity of the vehicle 700 includes: a processor 701, a communication interface 702, and a memory 703, where:

[0178] The processor 701 generally controls the overall operation of the vehicle 700.

[0179] The communication interface 702 can enable the vehicle to communicate with other terminals or servers through a network.

[0180] The memory 703 is configured to store instructions and applications executable by the processor 701, and can also cache data to be processed or already processed by the processor 701 and each module in the vehicle 700 (for example, image data, audio data, voice communication data, and video communication data), and can be implemented by flash memory (FLASH) or random access memory (Random Access Memory, RAM). Data transmission can be performed between the processor 701, the communication interface 702, and the memory 703 through a bus 704.

[0181] It should be understood that the "one embodiment" or "an embodiment" mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, the "in one embodiment" or "in an embodiment" that appears throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. It should be understood that in various embodiments of the present application, the size of the serial numbers of the above steps / processes does not mean the sequence of execution. The execution sequence of each step / process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present application. The serial numbers of the embodiments of the present application above are only for description and do not represent the advantages or disadvantages of the embodiments.

[0182] It should be noted that in this article, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the element.

[0183] In several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined, or can be integrated into another system, or some features can be ignored, or not executed. In addition, the coupling, direct coupling or communication connection between the components shown or discussed with each other can be through some interfaces. The indirect coupling or communication connection of devices or units can be electrical, mechanical or other forms.

[0184] The units described above as separate components may or may not be physically separated, and the components shown as units may or may not be physical units; they can be located in one place or distributed to multiple network units; some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0185] In addition, each functional unit in the embodiments of the present application can be all integrated in a processing unit, or each unit can be separately used as a unit, or two or more units can be integrated in one unit; the above integrated units can be implemented in the form of hardware, or in the form of hardware plus software functional units.

[0186] Those of ordinary skill in the art can understand that all or part of the steps of implementing the above method embodiments can be completed by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it performs the steps including those of the above method embodiments; and the aforementioned storage medium includes: removable storage devices, read-only memory (ROM), magnetic disks, or optical discs, etc., various media that can store program codes.

[0187] Alternatively, if the above integrated units of the present application are implemented in the form of software functional modules and sold or used as independent products, they can also be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present application, in essence, or the part that contributes to the related technology can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the methods described in the various embodiments of the present application. And the aforementioned storage medium includes: removable storage devices, ROM, magnetic disks, or optical discs, etc., various media that can store program codes.

[0188] As described above, only the implementation manners of the present application are provided, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or substitutions, which should all be covered by the protection scope of the present application.

Claims

1. A power distribution method for an electric vehicle, characterized in that, Including: Determine the current maximum discharge power of the high-voltage battery in the electric vehicle and the current actual consumption power of the vehicle's electricity-consuming functions; In the case where the current maximum discharge power does not satisfy the power distribution of the vehicle's electricity-consuming functions according to the current actual consumption power, based on the current maximum discharge power and the priority of each electricity-consuming function in the vehicle's electricity-consuming functions, determine the maximum consumption power of each electricity-consuming function at the next moment, where the priority is obtained based on the safety and comfort of the electricity-consuming function; In the case where the current maximum discharge power satisfies the power distribution of the vehicle's electricity-consuming functions according to the current actual consumption power, for each electricity-consuming function in the vehicle's electricity-consuming functions, determine the power consumption within the current change duration and the power consumption within the previous preset duration; Determine the sum of the change duration and the preset duration as the total duration; Determine the sum of the power consumption within the current change duration and the power consumption within the previous preset duration as the target power consumption; where the power consumption within the previous preset duration is the product of the power consumption within the previous preset duration and the previous preset duration; Determine the quotient of the target power consumption and the total duration as the power consumption within the next change duration; Determine the power consumption within the next change duration as the maximum consumption power of the corresponding electricity-consuming function; Based on the maximum consumption power of each electricity-consuming function at the next moment, control the actual consumption power of each electricity-consuming function at the next moment.

2. The method according to claim 1, characterized in that, The vehicle's electricity-consuming functions include a safety management function. The determining the maximum consumption power of each electricity-consuming function at the next moment based on the current maximum discharge power and the priority of each electricity-consuming function in the vehicle's electricity-consuming functions includes: determining the current maximum discharge power as the maximum consumption power of the safety management function at the next moment; and / or, The vehicle's electricity-consuming functions include a safety management function and a comfort management function, and the priority of the safety management function is higher than the priority of the comfort management function. The determining the maximum consumption power of each electricity-consuming function at the next moment based on the current maximum discharge power and the priority of each electricity-consuming function in the vehicle's electricity-consuming functions includes: determining the current actual consumption power of the safety management function; determining the first difference between the current maximum discharge power and the current actual consumption power of the safety management function as the maximum consumption power of the comfort management function at the next moment.

3. The method according to claim 2, characterized in that, The safety management function includes a DC converter function and a safety thermal management function. The determining the current maximum discharge power as the maximum consumption power of the safety management function at the next moment includes: Determining the current maximum discharge power as the maximum consumption power of the DC converter function at the next moment; Determining the current actual consumption power of the DC converter function; Determining the second difference between the current maximum discharge power and the current actual consumption power of the DC converter function as the maximum consumption power of the safety thermal management function at the next moment.

4. The method according to claim 2, characterized in that, The comfort management function includes: a driving function and a comfort thermal management function. Determining the first difference between the current maximum discharge power and the current actual power consumption of the safety management function as the maximum power consumption of the comfort management function at the next moment includes: Based on the first difference between the current maximum discharge power and the current actual power consumption of the safety management function, determining the power distribution state; When the power distribution state indicates that the first difference can simultaneously meet the minimum requirements of each power-consuming function in the comfort management function, based on the obtained ambient temperature and the vehicle acceleration, respectively determining the maximum power consumption of the driving function and the comfort thermal management function at the next moment.

5. The method according to claim 4, characterized in that, The respectively determining the maximum power consumption of the driving function and the comfort thermal management function at the next moment based on the obtained ambient temperature and the vehicle acceleration includes: Obtaining the ambient temperature and the vehicle acceleration; Based on the ambient temperature and the vehicle acceleration, determining a correction coefficient for the maximum power consumption; Determining the product of the correction coefficient for the maximum power consumption and the first difference as the maximum power consumption of the driving function at the next moment; Determining the difference between the first difference and the maximum power consumption of the driving function at the next moment as the maximum power consumption of the comfort thermal management function at the next moment.

6. The method according to claim 4, characterized in that, When the power distribution state indicates that the first difference cannot simultaneously meet the minimum requirements of each power-consuming function in the comfort management function, it further includes: Determining the first difference as the maximum power consumption of the driving function at the next moment; Determining the current actual power consumption of the driving function; Determining the third difference between the first difference and the current actual power consumption of the driving function as the maximum power consumption of the comfort thermal management function at the next moment.

7. A power distribution device for an electric vehicle, characterized in that, It includes: A first determination module, configured to determine the current maximum discharge power of the high-voltage battery in the electric vehicle and the current actual power consumption of the vehicle's power-consuming functions; A second determination module, configured to, when the current maximum discharge power does not meet the power distribution state of the vehicle's power-consuming functions according to the current actual power consumption, based on the current maximum discharge power and the priority of each power-consuming function in the vehicle's power-consuming functions, determine the maximum power consumption of each power-consuming function at the next moment, where the priority is obtained based on the safety and comfort of the power-consuming function; A third determination module, configured to, when the current maximum discharge power meets the power distribution state of the vehicle's power-consuming functions according to the current actual power consumption, for each power-consuming function in the vehicle's power-consuming functions, determine the power consumption within the current change duration and the power consumption within the previous preset duration; A fourth determination module, configured to determine the sum of the change duration and the preset duration as the total duration; A fifth determination module, configured to determine the sum of the power consumption within the current change duration and the power consumption within the previous preset duration as the target power consumption; wherein, the power consumption within the previous preset duration is the product of the power consumption within the previous preset duration and the previous preset duration; and determine the quotient of the target power consumption and the total duration as the power consumption within the next change duration; A sixth determination module, configured to determine the power consumption within the next change duration as the maximum power consumption of the corresponding power consumption function; A control module, configured to control the actual power consumption of each power consumption function at the next moment based on the maximum power consumption of each power consumption function at the next moment.

8. A vehicle, comprising a memory and a processor, the memory storing a computer program that can run on the processor, characterized in that, When the processor executes the program, the steps in the method according to any one of claims 1 to 6 are implemented.

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

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