WO2019113828A1

WO2019113828A1 - Method and apparatus for estimating remaining mileage of pure electric vehicle

Info

Publication number: WO2019113828A1
Application number: PCT/CN2017/115900
Authority: WO
Inventors: 刘斌
Original assignee: 深圳配天智能技术研究院有限公司
Priority date: 2017-12-13
Filing date: 2017-12-13
Publication date: 2019-06-20
Also published as: CN109302844A; CN109302844B

Abstract

A method for acquiring the remaining mileage of a pure electric vehicle. The method comprises: acquiring the remaining electric energy of a battery of a pure electric vehicle; collecting the maximum temperature, a discharge current, a health state parameter and an electricity consumption amount of the battery of the pure electric vehicle within a set unit of time, and a current voltage of the battery; according to the maximum temperature, the discharge current, the health state parameter and the electricity consumption amount of the battery within the set unit of time, the current voltage of the battery, and the speed of the pure electric vehicle within the set unit of time, determining an electric energy consumption value per unit of mileage of the pure electric vehicle within the set unit of time; and according to a ratio of the remaining electric energy of the battery to the electric energy consumption value per unit of mileage within the set unit of time, determining the remaining travelling distance of the pure electric vehicle. The method can improve the accuracy of acquiring the remaining mileage of a pure electric vehicle. Further disclosed are an electronic device (20), an apparatus (30) having a storage function, and an electric vehicle.

Description

Method and device for estimating remaining mileage of pure electric vehicles

[Technical Field]

The invention relates to the field of pure electric vehicles, in particular to a method and a device for acquiring the remaining mileage of a pure electric vehicle.

【Background technique】

The national EV863-standard regulations stipulate that the driving range of an electric vehicle refers to the mileage that the electric vehicle travels from the full state of the power battery to the end of the standard-specified test. The remaining mileage of the electric vehicle refers to the longest distance that the electric vehicle can still travel while maintaining the current driving mode under the current battery remaining capacity.

The accuracy of the remaining mileage calculation is one of the most concerned issues for electric vehicles, which directly leads to the mileage anxiety of the owner. Especially in the cold winter in the north, the situation of electric car brakes has occurred from time to time. It is obvious that it can travel for dozens of kilometers, but it can only be carried out after driving for more than ten kilometers or even several kilometers. A similar phenomenon occurs for electric vehicles that have been used for a while. Sometimes the remaining mileage jumps even when driving in complex conditions. These phenomena are related to the way the remaining mileage is calculated.

The calculation of the remaining mileage cannot be abandoned by the influence of external environmental factors, and the algorithm cannot be simply processed from the vehicle level. The power battery is the energy source of the electric car, which directly determines how far the electric car can run. The performance of the power battery in winter and summer is different. The distance that the electric car can travel is also different. The calculation of the remaining mileage cannot use the same calculation parameters. Otherwise, the remaining mileage of the meter and the actual remaining mileage will be huge. difference.

The electric mileage of the newly-built electric vehicle is different from that of the electric vehicle that has been used for a while, because the electric vehicle's power battery will age after using it for a period of time, the available energy will be reduced, and the corresponding driving range will be reduced, especially It is in the SOC (full name State of Charge, that is, the state of charge of the battery, also called the remaining power, which represents the ratio of the remaining capacity of the battery after being used for a period of time or for a long time, and the capacity of the fully charged state, expressed as a percentage. The value ranges from 0 to 100%. When SOC=0, it means that the battery is completely discharged. When SOC=100%, the battery is fully charged. When it is less than 20%, it will fall faster. At this point, we will have a similar experience in the use of mobile phones. Therefore, the calculation of the remaining mileage also needs to take into account the attenuation of the power battery during use.

In addition, the current method of calculating the remaining mileage is mostly based on the energy consumption per unit time from the start of driving to the current period. This calculation method does not consider the influence of the change of working conditions on the calculation of the remaining mileage. When traveling in different working conditions, the remaining mileage of the electric vehicle is different under the same SOC condition. This requires us to continuously adjust and calculate the remaining mileage calculation method under different working conditions. Ensure the accuracy of the remaining mileage calculation.

That is to say, the prior art has the following disadvantages: (1) The influence of external factors (such as temperature) on the remaining mileage is weakened. (2) Ignore the transient characteristics of the driving conditions of the car. (3) The effect of the attenuation of the battery during use on the battery life is not considered.

[Summary of the Invention]

The technical problem mainly solved by the present invention is to provide a method and a device for acquiring the remaining mileage of a pure electric vehicle, which can more accurately acquire the remaining mileage of the pure electric vehicle.

In order to solve the above technical problem, the first technical solution adopted by the present invention is to provide a method for acquiring the remaining mileage of a pure electric vehicle, the obtaining method comprising: acquiring remaining battery power of the pure electric vehicle; collecting the pure The maximum temperature, discharge current, health status parameter, power consumption amount and current voltage of the battery of the electric vehicle battery in the set unit time; according to the maximum temperature, discharge current, and health of the battery in the set unit time a state parameter, a power consumption amount, a current voltage of the battery, and a speed of the pure electric vehicle in a set unit time to determine a power consumption value of the unit mileage of the pure electric vehicle in the set unit time; The ratio of the remaining electrical energy of the battery and the electrical energy consumption value of the unit mileage in the set unit time determines the remaining driving distance of the pure electric vehicle.

In order to solve the above technical problem, the second technical solution adopted by the present invention is to provide an electronic device including a memory, a processor, and a memory stored on the memory and operable on the processor. A computer program, when the processor executes the program, implements a method for acquiring a remaining mileage of a pure electric vehicle according to any one of the inventions.

In order to solve the above technical problem, the third technical solution adopted by the present invention is to provide a A device having a storage function on which is stored a computer program capable of being executed to implement a method of acquiring the remaining mileage of the pure electric vehicle according to any one of the present inventions.

In order to solve the above technical problem, the fourth technical solution adopted by the present invention is to provide an electric vehicle including the above electronic device.

The beneficial effects of the present invention are: compared with the prior art, the beneficial effects of the present invention are: in the calculation process of the remaining mileage of the pure electric vehicle, taking into consideration factors such as temperature, battery health state SOH and the like affecting the power battery capacity, and adjusting The method of calculating the remaining mileage when driving under complex conditions, weighting the energy consumption per unit mileage in multiple time periods, so that the calculation of the remaining mileage is more accurate. The invention can improve the accuracy of the calculation of the remaining mileage of the pure electric vehicle.

[Description of the Drawings]

1 is a schematic flow chart of an embodiment of a method for acquiring a remaining mileage of a pure electric vehicle according to the present invention;

2 is a schematic structural view of an embodiment of an electronic device according to the present invention;

3 is a schematic structural view of an embodiment of a device having a storage function according to the present invention.

【Detailed ways】

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

Referring to FIG. 1, FIG. 1 is a schematic flow chart of an embodiment of a method for acquiring remaining mileage of a pure electric vehicle according to the present invention. As shown in FIG. 1, the method for obtaining the remaining mileage of the pure electric vehicle of the present invention is as follows:

101: Obtain the remaining battery power of the pure electric vehicle.

In the present embodiment, the electronic device acquires the remaining battery power of the pure electric vehicle. Among them, the electronic equipment is connected with a pure electric vehicle for collecting and processing various parameters of the pure electric vehicle.

In a specific embodiment, the electronic device includes a BMS and a VCU, and the BMS is a full name of a Battery Management System, that is, a battery management system, and the main function is to measure, evaluate, manage, protect, and alert the battery system; the VCU is called a Vehicle Control Unit, that is, The vehicle controller, by collecting the accelerator pedal signal, the brake pedal signal and other component signals, and making corresponding judgments, controls the actions of the lower component controllers to drive the car to run normally, and it plays the role of controlling the vehicle operation. . The electronic device is connected with a pure electric vehicle, and the electronic device obtains the current remaining power value of the pure electric vehicle battery, the normal driving residual power threshold value, the rated voltage and the nominal rated capacity, wherein the nominal rated capacity of the battery refers to the battery label The capacity value of the battery, the nominal rated capacity is the capacity measured under the experimental conditions specified by the standard, and this value is close to the factory rated capacity of the battery, but not necessarily equal. Determine the remaining battery power of the pure electric vehicle according to the current remaining battery value of the obtained battery, the threshold value of the normal running residual power, the rated voltage and the nominal rated capacity, the current remaining battery value of the battery, the threshold value of the normal running residual power, the rated voltage and The relationship between the nominal rated capacity and the remaining battery power of the pure electric vehicle satisfies the relationship of equation (3).

E _r =V _rated ×C _rated ×(SOC _current -SOC _end ) (3)

Where, _Er is the remaining battery power of the pure electric vehicle, V _rated is the rated voltage, C _rated is the nominal rated capacity, SOC _current is the current remaining power value, and SOC _end is the remaining power threshold. 102: Collect the maximum temperature, discharge current, health status parameter, power consumption amount and current voltage of the battery in the battery of the pure electric vehicle.

In a specific implementation, the unit time is set as a packet interaction period of a BMS and a VCU. In other embodiments, the set unit time may also be a packet exchange period of two, three or more BMSs and VCUs, which is not limited by the present invention.

Specifically, the electronic device acquires the power consumption amount in the set unit time, obtains the current voltage of the battery from the BMS and the VCU message, and collects the highest temperature, the discharge current, and the health of the battery of the pure electric vehicle in the set unit time. Status parameter.

103: Determine the pure electric vehicle in the set unit time according to the maximum temperature, the discharge current, the health state parameter, the power consumption amount and the current voltage of the battery in the set unit time, and the speed of the pure electric vehicle in the set unit time. The power consumption value of the internal unit mileage.

In a specific embodiment, determining the battery at the highest temperature and discharge current state Factory rated capacity; determine the current rated capacity of the battery according to the factory rated capacity and health status parameters; according to the battery's power consumption within the set unit time, the current rated capacity, the current voltage of the battery, and the pure electric vehicle at the set unit time The internal speed determines the power consumption value of the unit mileage of the pure electric vehicle in the set unit time. Among them, the factory rated capacity of the battery refers to the battery capacity measured at a specific temperature and a specific charge and discharge rate when the battery is shipped. At this time, the battery health state SOH is 100%; the SOH full name is State of Health, that is, the battery system. The state of health is defined as the ratio of the capacity discharged by the power battery from a full state to a cutoff voltage under a standard condition and its corresponding nominal capacity. The battery SOH at the time of shipment is 100%, and the national standard stipulates that the SOH is low. 80% power battery can not continue to be used in electric vehicles; the current rated capacity of the battery refers to the battery capacity measured under the current temperature and current charge and discharge rate conditions. At this time, the battery SOH is 80% to 100%. Therefore, it is necessary to consider the effect of battery attenuation on battery capacity.

Specifically, the truth value table of the factory rated capacity under different temperatures and different charge and discharge rates is set according to the life cycle data of the battery system, and the factory rated capacity of the battery system in the current state is confirmed by the highest single temperature of the battery system and the current current size; The current rated capacity of the battery is determined according to the factory rated capacity and the health state parameter, and the current rated capacity, the factory rated capacity, and the health state parameter satisfy the relationship as in the formula (1).

C=C ₀ ×SOH (1)

Where C is the current rated capacity, C ₀ is the factory rated capacity, and SOH is the health status parameter;

Obtain the driving distance of the pure electric vehicle in the set unit time; determine the pure according to the battery consumption in the set unit time, the current rated capacity, the current voltage of the battery, and the driving distance of the pure electric vehicle in the set unit time. The electric vehicle consumes the electric energy consumption value per unit time in the unit time, the battery consumption in the set unit time, the current rated capacity, the current voltage of the battery, and the driving distance of the pure electric vehicle in the set unit time. The relationship of formula (2),

among them,

It is the electric energy consumption value of the unit electric mileage of the pure electric vehicle in the set unit time, S is the driving distance of the pure electric vehicle in the set unit time, C is the current rated capacity, V is the current voltage of the battery, and ΔSOC is the battery setting. The amount of electricity consumed per unit of time.

104: Determine the remaining driving distance of the pure electric vehicle by using the ratio of the remaining energy of the battery and the electric energy consumption value of the unit mileage in the unit time.

In a specific embodiment, directly calculating the remaining energy E _{r of the} battery and setting the electric energy consumption value of the unit mileage per unit time

The ratio is the remaining travel distance of a pure electric vehicle.

In another specific embodiment, the remaining travel distance of the pure electric vehicle is determined by the ratio of the remaining energy of the battery and the weighted average of the two values of the power consumption value per unit time, wherein the two set unit times are The most recent time period of the current time. It should be noted that the present embodiment is exemplified by two sets of unit time. In other embodiments, the number of unit time sets may be two or more, two or more. The weight of the power consumption value in the unit time is different, which is not limited by the present invention.

Specifically, the electronic device obtains the electric energy consumption value of the unit mileage in the first set unit time and the second set unit time by the pure electric vehicle; in the first set unit time and the second setting on the pure electric vehicle The energy consumption value of the unit mileage per unit time is weighted and calculated, and the weighted average value of the electric energy consumption value is obtained; the remaining driving distance of the pure electric vehicle is determined by the ratio of the remaining energy of the battery and the weighted average value of the electric energy consumption value, the remaining battery power, pure The electric energy consumption value of the electric vehicle in the first set unit time, the electric energy consumption value of the pure electric vehicle in the second set unit time, and the remaining driving distance of the pure electric vehicle satisfy the formula (4). Relationship,

among them,

It is the electric energy consumption value of the unit mileage of the pure electric vehicle in the first set unit time.

It is the electric energy consumption value of the unit mileage of the pure electric vehicle in the second set unit time, and λ is the weighting coefficient.

Further, when the power consumption value of the unit mileage in the two set unit time is within the predetermined range, it is considered that the road condition in the current period is relatively stable, and the power consumption value in the set unit time far from the current time is determined. Can not be considered. When two units are set in unit time When the difference of the electric energy consumption value of the mileage exceeds the predetermined range, it is considered that the current driving condition is unstable, and at this time, different λ values are selected according to the degree of exceeding. The greater the degree of excess, the greater the proportion of the energy consumption per unit of mileage in the set unit time that is closer to the current time. For example, the predetermined range is 5%, and the first set unit time is closer to the current time. When the difference between the power consumption values of the unit mileage in the two set unit time is the power consumption value of the unit mileage in the first set unit time. At 4%, the power consumption value of the unit mileage in the two set unit time is within 5% of the predetermined range. It is considered that the road condition in the current period is relatively stable, and the value of λ is 1, that is, the calculation method is the same at this time. There is only one calculation method for setting the time unit; when the difference between the electric energy consumption value of the unit mileage in the two set unit time exceeds 5% of the electric energy consumption value per unit mileage in the first set unit time, the predetermined range is exceeded. It is considered that the current road condition is unstable for a period of time. The power consumption value of the unit mileage in the two set unit time needs to be considered. The value of λ is based on the excess degree. The greater the degree of exceeding, the unit within the set time unit that is closer to the current time. The power consumption value is taken as a large proportion.

Different from the prior art, the beneficial effects of the present invention are: in the calculation process of the remaining mileage of the pure electric vehicle, taking into consideration factors such as temperature, battery health state SOH and the like affecting the power battery capacity, and adjusting when driving under complicated working conditions The remaining mileage calculation method weights the energy consumption per unit mileage in multiple time periods, so that the calculation of the remaining mileage is more accurate. The invention can improve the accuracy of the calculation of the remaining mileage of the pure electric vehicle.

Referring to FIG. 2, FIG. 2 is a schematic structural diagram of an embodiment of an electronic device according to the present invention. As shown in FIG. 2, the electronic device 20 of the present embodiment includes a communication circuit 23, a memory 21, and a processor 22 for communicating with other terminals. The memory 21 is for storing a computer program executed by the processor 22 and The intermediate data generated when the computer program is executed; when the processor 22 executes the computer program, the method for acquiring the remaining mileage of the pure electric vehicle according to any of the above aspects of the present invention is realized.

In the present embodiment, the processor 22 acquires the remaining battery power of the pure electric vehicle. Among them, the electronic device 20 is connected to a pure electric vehicle.

In a specific embodiment, the electronic device 20 is connected to a pure electric vehicle, the electronic device 20 includes a BMS and a VCU, and the BMS is a full name of a Battery Management System, that is, a battery management system, and the main function is to measure, evaluate, manage, and protect the battery system. with Warning; VCU full name Vehicle Control Unit, that is, the vehicle controller, by collecting the accelerator pedal signal, brake pedal signal and other component signals, and making corresponding judgments, control the action of each component controller of the lower layer to drive the car to run normally. It plays a role in controlling the operation of the vehicle. The processor 22 obtains the current remaining power value, the normal running residual power threshold, the rated voltage, and the nominal rated capacity of the pure electric vehicle battery through the communication circuit 23, wherein the nominal rated capacity of the battery refers to the battery indicated on the battery label. The capacity value, nominal rated capacity is the capacity measured under the experimental conditions specified by the standard. This value is close to the factory rated capacity of the battery, but not necessarily equal. Determine the remaining battery power of the pure electric vehicle according to the current remaining battery value of the obtained battery, the threshold value of the normal running residual power, the rated voltage and the nominal rated capacity, the current remaining battery value of the battery, the threshold value of the normal running residual power, the rated voltage and The relationship between the nominal rated capacity and the remaining battery power of the pure electric vehicle satisfies the relationship of equation (3).

E _r =V _rated ×C _rated ×(SOC _current -SOC _end ) (3)

Where, _Er is the remaining battery power of the pure electric vehicle, V _rated is the rated voltage, C _rated is the nominal rated capacity, SOC _current is the current remaining power value, and SOC _end is the remaining power threshold.

Specifically, the processor 22 acquires the power consumption amount in the set unit time through the communication circuit 23, obtains the current voltage of the battery from the BMS and VCU messages, and collects the highest temperature of the battery of the pure electric vehicle in the set unit time. , discharge current, health status parameters.

In a specific embodiment, the processor 22 determines the factory rated capacity of the battery in the highest temperature and discharge current state; determines the current rated capacity of the battery according to the factory rated capacity and the health state parameter; according to the battery in the set unit time The power consumption, the current rated capacity, the current voltage of the battery, and the speed of the pure electric vehicle in the set unit time determine the power consumption value of the unit mileage of the pure electric vehicle in the set unit time. value. Among them, the factory rated capacity of the battery refers to the battery capacity measured at a specific temperature and a specific charge and discharge rate when the battery is shipped. At this time, the battery health state SOH is 100%; the SOH full name is State of Health, that is, the battery system. The state of health is defined as the discharge of the power battery from a full state to a cutoff voltage at a certain rate under standard conditions. The ratio of the discharged capacity to its corresponding nominal capacity, the battery SOH at the factory is 100%, the national standard stipulates that the SOH is lower than 80%, the power battery cannot continue to be used on the electric vehicle; the current rated capacity of the battery refers to the battery The battery capacity measured under the current temperature and current charge and discharge rate conditions, the battery SOH at this time is between 80% and 100%, so it is necessary to consider the influence of battery attenuation on the battery capacity.

Specifically, the processor 22 sets a truth table of the factory rated capacity at different temperatures and different charge and discharge rates according to the life cycle data of the battery system, stores the truth table in the memory 21, and the processor 22 passes the highest single cell of the battery system. The temperature and current current size confirm the factory rated capacity of the battery system in the current state; determine the current rated capacity of the battery according to the factory rated capacity and health status parameters, the current rated capacity, the factory rated capacity and the health status parameter satisfy the relationship as in formula (1) ,

C=C ₀ ×SOH (1)

Among them, C is the current rated capacity, C ₀ is the factory rated capacity, SOH is the health status parameter; and the driving distance of the pure electric vehicle in the set unit time is obtained.

The processor 22 obtains the driving distance of the pure electric vehicle in the set unit time; according to the power consumption of the battery in the set unit time, the current rated capacity, the current voltage of the battery, and the driving of the pure electric vehicle in the set unit time The distance determines the power consumption value of the unit electric mileage of the pure electric vehicle in the set unit time, the power consumption of the battery in the set unit time, the current rated capacity, the current voltage of the battery, and the driving of the pure electric vehicle in the set unit time. The distance satisfies the relationship as in formula (2).

among them,

In a specific embodiment, the processor 22 directly calculates the remaining energy E _{r of the} battery and the power consumption value of the unit mileage in the set unit time.

The ratio is the remaining travel distance of a pure electric vehicle.

In another specific embodiment, the processor 22 passes the remaining battery power and two The ratio of the weighted average of the electric energy consumption values per unit time is determined to determine the remaining travel distance of the pure electric vehicle, wherein the two set unit times are the time periods closest to the current time. It should be noted that the present embodiment is exemplified by two sets of unit time. In other embodiments, the number of unit time sets may be two or more, two or more. The weight of the power consumption value in the unit time is different, which is not limited by the present invention.

Specifically, the processor 22 acquires the electric energy consumption value of the unit electric mileage of the pure electric vehicle in the first set unit time and the second set unit time; the first set unit time and the second setting of the pure electric vehicle The energy consumption value of the unit mileage per unit time is weighted and calculated, and the weighted average value of the electric energy consumption value is obtained; the remaining driving distance of the pure electric vehicle is determined by the ratio of the remaining energy of the battery and the weighted average value of the electric energy consumption value, the remaining battery power, pure The electric energy consumption value of the electric vehicle in the first set unit time, the electric energy consumption value of the pure electric vehicle in the second set unit time, and the remaining driving distance of the pure electric vehicle satisfy the formula (4). Relationship,

among them,

Further, when the power consumption value of the unit mileage in the two set unit time is within the predetermined range, it is considered that the road condition in the current period is relatively stable, and the power consumption value in the set unit time far from the current time is determined. Can not be considered. When the difference between the electric energy consumption values of the unit mileage in the two set unit time exceeds the predetermined range, it is considered that the current driving condition is unstable. At this time, according to the degree of exceeding, different λ values are selected. The greater the degree of excess, the greater the proportion of the energy consumption per unit of mileage in the set unit time that is closer to the current time. For example, the predetermined range is 5%, and the first set unit time is closer to the current time. When the difference between the power consumption values of the unit mileage in the two set unit time is the power consumption value of the unit mileage in the first set unit time. At 4%, the power consumption value of the unit mileage in the two set unit time is within 5% of the predetermined range. If the road condition is stable during the current period, the value of λ is 1, that is, the calculation method at this time. The formula is the same as the calculation method of only one set time unit; when the difference between the power consumption value of the unit mileage in the two set unit time exceeds 5% of the electric energy consumption value of the unit mileage in the first set unit time, the reservation is exceeded. The range is considered to be unstable in the current period of time. The energy consumption values of the unit mileage in the two set units of time need to be considered. λ is based on the degree of excess. The greater the degree of excess, the set time is closer to the current time. The power consumption value in the unit is taken as a large proportion.

The electronic device of the present invention can be used in an electric vehicle.

Please refer to FIG. 3. FIG. 3 is a schematic structural diagram of an apparatus having a storage function according to the present invention. The device 30 having the storage function stores at least one program or instruction 31 for implementing any of the above methods. In one embodiment, the device having the storage function may be a storage chip in the terminal, a hard disk, or other removable storage or storage tool such as a mobile hard disk or a flash memory, an optical disk, or the like, or a server or the like.

The above is only the embodiment of the present invention, and is not intended to limit the scope of the invention, and the equivalent structure or equivalent process transformations made by the description of the invention and the drawings are directly or indirectly applied to other related technologies. The fields are all included in the scope of patent protection of the present invention.

Claims

A method for obtaining a remaining mileage of a pure electric vehicle, characterized in that the obtaining method comprises:

Obtaining the remaining battery power of the pure electric vehicle;

Collecting a maximum temperature, a discharge current, a health state parameter, a power consumption amount, and a current voltage of the battery of the battery of the pure electric vehicle in a set unit time;

Determining the pure electric motor according to a maximum temperature, a discharge current, a health state parameter, a power consumption amount, a current voltage of the battery, and a speed of the pure electric vehicle in a set unit time of the battery within a set unit time. The electric energy consumption value of the vehicle in the set unit time in the set unit time;

The remaining travel distance of the pure electric vehicle is determined by the ratio of the remaining electrical energy of the battery and the electrical energy consumption value of the unit mileage within the set unit time.
The acquisition method according to claim 1, wherein the maximum temperature, a discharge current, a health state parameter, a power consumption amount, and a current voltage of the battery according to the battery in a set unit time and the The step of determining the electric energy consumption value of the unit electric mileage of the pure electric vehicle in the set unit time by the speed of the pure electric vehicle in the set unit time includes:

Determining a factory rated capacity of the battery at the highest temperature and the discharge current state;

Determining a current rated capacity of the battery according to the factory rated capacity and the health state parameter, the current rated capacity, the factory rated capacity, and the health state parameter satisfying a relationship as described in formula (1),

C=C 0 ×SOH (1)

Wherein C is the current rated capacity, C 0 is the factory rated capacity, and SOH is the health state parameter;

Determining, according to the amount of power consumption of the battery in the set unit time, the current rated capacity, the current voltage of the battery, and the speed of the pure electric vehicle in the set unit time, the pure electric vehicle is in the Set the power consumption value of the unit mileage per unit time.
The acquisition method according to claim 2, wherein the amount of power consumption according to the battery in a set unit time, the current rated capacity, a current voltage of the battery, and the pure electric vehicle are The step of determining the speed of the unit time to determine the power consumption value of the unit mileage of the pure electric vehicle in the set unit time specifically includes:

Obtaining a driving distance of the pure electric vehicle in a set unit time;

According to the amount of power consumption of the battery in a set unit time, the current rated capacity, the The current voltage of the battery and the driving distance of the pure electric vehicle in the set unit time determine the electric energy consumption value of the unit electric mileage of the pure electric vehicle in the set unit time, the battery is within the set unit time The power consumption amount, the current rated capacity, the current voltage of the battery, and the travel distance of the pure electric vehicle in the set unit time satisfy a relationship as described in the formula (2),

among them,
Is the electric energy consumption value of the pure electric vehicle in the unit time of the set unit time, S is the driving distance of the pure electric vehicle in the set unit time, C is the current rated capacity, and V is the The current voltage of the battery, ΔSOC, is the amount of power consumed by the battery within a set unit time.
The method of claim 1 , wherein the step of acquiring the remaining battery power of the pure electric vehicle comprises:

Obtaining a current remaining power value of the battery, a normal running residual power threshold, a rated voltage, and a nominal rated capacity;

Determining the remaining battery power of the pure electric vehicle according to the obtained current remaining power value of the battery, the normal running residual power threshold, the rated voltage, and the nominal rated capacity, the current remaining power value of the battery, and the remaining running power of the battery The relationship between the critical value, the rated voltage and the nominal rated capacity, and the remaining battery power of the pure electric vehicle satisfy the relationship as described in the formula (3),

E r =V rated ×C rated ×(SOC current -SOC end ) (3)

Wherein, Er is the battery residual energy of the pure electric vehicle, V rated is the rated voltage, C rated is the nominal rated capacity, SOC current is the current remaining power value, and SOC end is the remaining power Threshold value.
The obtaining method according to claim 1, wherein the step of determining the remaining driving distance of the pure electric vehicle by using the ratio of the remaining electrical energy of the battery and the electric energy consumption value of the unit mileage in the set unit time comprises:

The remaining travel distance of the pure electric vehicle is determined by the ratio of the remaining electrical energy of the battery and the weighted average of the at least two set electrical energy consumption values per unit time.
The obtaining method according to claim 5, wherein the remaining driving distance of the pure electric vehicle is determined by a ratio of a remaining electric energy of the battery and a weighted average value of electric energy consumption values of at least two set unit time periods The steps specifically include:

Obtaining the pure electric vehicle in the first set unit time and the second set unit time unit The electrical energy consumption value of the process;

Performing a weighted calculation on the electric energy consumption value of the pure electric vehicle in the first set unit time and the second set unit time, and obtaining a weighted average value of the electric energy consumption value;

Determining a remaining travel distance of the pure electric vehicle by using a ratio of a residual electric energy of the battery and a weighted average value of the electric energy consumption value, the remaining electric energy of the battery, and the unit mileage of the pure electric vehicle in the first set unit time The electric energy consumption value, the electric energy consumption value of the unit mileage of the pure electric vehicle in the second set unit time, and the remaining travel distance of the pure electric vehicle satisfy the relationship as shown in the formula (4).

among them,
Is the electric energy consumption value of the unit mileage of the pure electric vehicle in the first set unit time,
It is the electric energy consumption value of the unit mileage of the pure electric vehicle in the second set unit time, and λ is a weighting coefficient.
The acquiring method according to claim 1, wherein the setting unit time comprises a message interaction period of at least one battery management system and a vehicle controller.
The obtaining method according to claim 1, wherein the collecting the maximum temperature, the discharging current, the health state parameter, the power consumption amount, and the current state of the battery of the battery of the pure electric vehicle in a set unit time The steps of the voltage specifically include:

Obtaining the amount of power consumption in the set unit time;

Obtaining a current voltage of the battery from a message of the battery management system and the vehicle controller;

The maximum temperature, discharge current, and health state parameters of the battery of the pure electric vehicle are set in a unit time.
An electronic device, comprising: a memory, a processor, and a computer program stored on the memory and operable on the processor, the processor implementing the program when executing the program A method for obtaining a remaining mileage of a pure electric vehicle according to any one of claims 1-8.
A device having a storage function, on which a computer program is stored, characterized in that the computer program can be executed to implement a method for acquiring the remaining mileage of the electric vehicle of any one of claims 1-8.
An electric vehicle, characterized in that the electric vehicle comprises the electronic device of claim 9.