CN115583164A

CN115583164A - Control method and device of extended range vehicle

Info

Publication number: CN115583164A
Application number: CN202211345772.XA
Authority: CN
Inventors: 田宇; 吴生玉; 张迪; 王月成; 石文杰
Original assignee: Hozon New Energy Automobile Co Ltd
Current assignee: Hozon New Energy Automobile Co Ltd
Priority date: 2022-10-31
Filing date: 2022-10-31
Publication date: 2023-01-10

Abstract

The application discloses a control method and device of a range-extended vehicle, relates to the technical field of vehicles and provides a solution for improving vehicle power in a low-temperature environment. The main technical scheme of the application is as follows: acquiring the current residual capacity of a vehicle battery; judging whether the current residual electric quantity is reduced to a preset initial electric quantity balance point or not; if the current residual electric quantity is not reduced to a preset initial electric quantity balance point, judging whether the environment temperature of the vehicle is smaller than or equal to a preset low-temperature threshold value or not; if the ambient temperature of the vehicle is less than or equal to a preset low-temperature threshold, determining a target residual electric quantity correspondingly required at the ambient temperature according to a preset target driving motor power corresponding to the vehicle; and controlling the charging of the vehicle by taking the target residual capacity as a demand so as to provide driving power for a driving motor of the vehicle.

Description

Control method and device of extended range vehicle

Technical Field

The present application relates to the field of vehicle technologies, and in particular, to a method and an apparatus for controlling a range-extended vehicle.

Background

The range extender generally refers to an electric vehicle component which can provide additional electric energy, so that the electric vehicle can increase the driving mileage. In the conventional control means, the generated power is judged by identifying the conditions of the charging capacity of a battery, the driving requirement of the whole vehicle, the vehicle speed of the vehicle, the residual battery capacity and the like in the driving process.

At present, under low temperature environment, if the customer uses similar driving modes such as electricelectric priority, can use vehicle residual capacity to extremely low level, the battery can also appear at low temperature even and does not accept the circumstances that the range extender charges, finally makes electric core be in under the low residual capacity circumstances of low temperature always, and discharge power is relatively poor, can be less than the demand of the complete performance of vehicle driving motor far away. Therefore, a solution for improving the power of the vehicle in a low temperature environment is urgently needed.

Disclosure of Invention

In view of the above, the present application provides a control method and apparatus for an extended range vehicle, so as to provide a solution for improving vehicle power in a low temperature environment.

The application mainly provides the following technical scheme:

a first aspect of the present application provides a control method of an extended range vehicle, the method including:

acquiring the current residual capacity of a vehicle battery;

judging whether the current residual electric quantity is reduced to a preset initial electric quantity balance point or not;

if the current residual electric quantity is not reduced to a preset initial electric quantity balance point, judging whether the environment temperature of the vehicle is smaller than or equal to a preset low-temperature threshold value or not;

if the ambient temperature of the vehicle is less than or equal to a preset low-temperature threshold, determining a target residual electric quantity correspondingly required at the ambient temperature according to a preset target driving motor power corresponding to the vehicle;

and controlling to charge the vehicle by taking the target residual capacity as a demand so as to provide driving power for a driving motor of the vehicle.

In some modified embodiments of the first aspect of the present application, the determining a target remaining capacity correspondingly required at the ambient temperature according to a preset rated power requirement of a driving motor corresponding to the vehicle includes:

subtracting the preset upper limit value of the discharging power of the range extender from the preset target driving motor power to obtain the target discharging power correspondingly required by the vehicle battery;

determining a battery core lower limit temperature value of a vehicle battery according to the environment temperature of the vehicle;

obtaining a target charging income curve corresponding to the lower limit temperature value of the electric core by searching a preset charging income curve corresponding to each of a plurality of preset electric core temperature values, wherein the target income curve comprises a mapping relation between different preset residual electric quantities reached by battery charging and preset discharging power of a corresponding provided battery;

and searching a target residual electric quantity which is required for realizing the corresponding target discharge power and is obtained by charging the battery from the target charging income curve according to the mapping relation.

In some modified embodiments of the first aspect of the present application, before the charging the vehicle with the target remaining capacity as the demand control to provide the driving power to the driving motor of the vehicle, the method further includes:

judging whether the target residual electric quantity is greater than or equal to the preset initial electric quantity balance point or not;

and if so, discarding the determined target residual electric quantity, and determining a new target residual electric quantity according to the electric quantity value corresponding to the preset initial electric quantity balance point so as to charge the vehicle.

In some modified embodiments of the first aspect of the present application, if it is detected that the battery cell temperature decreases to be less than or equal to the preset low temperature threshold, the method further includes:

judging whether the current residual capacity is greater than a first preset residual capacity threshold value or not in the discharging process of a vehicle battery;

if so, controlling the upper limit value of the generated power of the range extender to be equal to the sum of the upper limit value of the charging power of the battery cell of the vehicle and the power consumed by the vehicle accessories;

and controlling the driving motor to provide driving power according to the upper limit value of the generated power of the driving motor.

In some variations of the first aspect of the present application, the method further comprises:

in the discharging process of a vehicle battery, if the current residual capacity is not greater than the first preset residual capacity threshold value, judging whether the current residual capacity is greater than a second preset residual capacity threshold value, wherein the second preset residual capacity threshold value is smaller than the first preset residual capacity threshold value;

if so, controlling the upper limit value of the generating power of the range extender to be equal to the sum of the upper limit value of the charging power of the battery cell of the vehicle and the consumed power of the vehicle accessories, and obtaining the target generating power corresponding to the range extender;

controlling the self electric power upper limit value of the driving motor to be reduced to reach the same value as the target generated power as the current remaining capacity is gradually reduced.

in the discharging process of the vehicle battery, if the current residual capacity is not greater than the second preset residual capacity threshold value, controlling the upper limit value of the generated power of the range extender to be equal to the target generated power;

and controlling the driving motor to enable the upper limit value of the generated power of the driving motor to be equal to the target generated power.

A second aspect of the present application provides a control apparatus of an extended range vehicle, the apparatus including:

an acquisition unit for acquiring a current remaining capacity of a vehicle battery;

the judging unit is used for judging whether the current residual electric quantity is reduced to a preset initial electric quantity balance point or not;

the judging unit is further configured to judge whether the ambient temperature of the vehicle is less than or equal to a preset low-temperature threshold value if the current remaining power is not reduced to a preset initial power balance point;

the determining unit is used for determining a target residual electric quantity correspondingly required at the ambient temperature according to a preset target driving motor power corresponding to the vehicle if the ambient temperature of the vehicle is less than or equal to a preset low-temperature threshold;

and the first control unit is used for controlling charging of the vehicle by taking the target residual capacity as a demand so as to provide driving power for a driving motor of the vehicle.

In some modified embodiments of the second aspect of the present application, the determining unit 303 includes:

the first acquisition module is used for subtracting the preset upper limit value of the discharging power of the range extender from the preset target driving motor power to obtain the target discharging power correspondingly required by the vehicle battery;

the determining module is used for determining a battery cell lower limit temperature value of the vehicle battery according to the environment temperature of the vehicle;

the second acquisition module is used for acquiring a target charging income curve corresponding to the lower limit temperature value of the electric core by searching a preset charging income curve corresponding to each of a plurality of preset electric core temperature values, wherein the target income curve comprises a mapping relation between different preset residual electric quantities obtained by charging the battery and preset discharging power of the corresponding battery;

and the searching module is used for searching the target residual electric quantity which is required by the battery charging corresponding to the target discharging power from the target charging income curve according to the mapping relation.

In some modified embodiments of the second aspect of the present application, before the charging the vehicle with the target remaining capacity as the demand control to provide driving power to a drive motor of the vehicle, the apparatus further includes:

the judging unit is further configured to judge whether the target remaining power is greater than or equal to the preset initial power balance point;

a discarding unit configured to discard the determined required target remaining power if it is determined that the target remaining power is greater than or equal to the preset initial power balance point;

the determining unit is further configured to determine a new target remaining electric quantity according to the electric quantity value corresponding to the preset initial electric quantity balance point, so as to charge the vehicle.

In some modified embodiments of the second aspect of the present application, if it is detected that the battery cell temperature decreases to less than or equal to the preset low temperature threshold, the apparatus further includes:

the judging unit is also used for judging whether the current residual capacity is greater than a first preset residual capacity threshold value or not in the discharging process of the vehicle battery;

the second control unit is used for controlling the upper limit value of the generated power of the range extender to be equal to the sum of the upper limit value of the charging power of the battery cell of the vehicle battery and the power consumed by vehicle accessories if the current residual capacity is determined to be larger than a first preset residual capacity threshold;

and the third control unit is used for controlling the driving motor to provide driving power according to the upper limit value of the generated power of the driving motor.

In some variations of the second aspect of the present application, the apparatus further comprises:

the judging unit is further configured to judge whether the current remaining power is greater than a second preset remaining power threshold value in a discharging process of a vehicle battery, if the current remaining power is not greater than the first preset remaining power threshold value, where the second preset remaining power threshold value is smaller than the first preset remaining power threshold value;

the fourth control unit is used for controlling the upper limit value of the generating power of the range extender to be equal to the sum of the upper limit value of the charging power of the battery cell of the vehicle and the power consumed by the vehicle accessories if the current residual capacity is determined to be larger than a second preset residual capacity threshold value, so as to obtain the target generating power corresponding to the range extender;

and a fifth control unit configured to control the self electric power upper limit value of the drive motor to be reduced to be equal to the target generated power as the current remaining amount is gradually reduced.

the sixth control unit is used for controlling the upper limit value of the generated power of the range extender to be equal to the target generated power if the current residual capacity is not greater than the second preset residual capacity threshold value in the discharging process of the vehicle battery;

and the seventh control unit is used for controlling the driving motor to enable the upper limit value of the generated power of the driving motor to be equal to the target generated power.

A third aspect of the present application provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements a control method of an extended range vehicle as described above.

The present application provides, in a fourth aspect, an electronic device comprising: the system comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor executes the computer program to realize the control method of the extended range vehicle.

By means of the technical scheme, the technical scheme provided by the application at least has the following advantages:

the application provides a control method and a control device for a range-extended vehicle, and the method and the device are used for further judging whether the vehicle is in a preset low-temperature environment or not when the current residual electric quantity of the vehicle is determined to be reduced to a preset initial electric quantity balance point, and if so, immediately determining the required target residual electric quantity at the environment temperature according to the preset target driving motor power corresponding to the vehicle, so that the target residual electric quantity is timely controlled to be used as a demand to charge the vehicle, and the driving power is provided for the driving motor of the vehicle. The scheme provided by the application can effectively avoid the situation that the vehicle is continuously in the low-temperature low-residual-power condition, and further avoid the situation that the range extender cannot be charged due to the low temperature of the battery cell. Compared with the prior art, the technical problem that performance requirements of a vehicle driving motor are difficult to meet due to the fact that the vehicle is in the low-temperature low-residual-energy condition is solved, the scheme provided by the application can be suitable for different environment temperatures, the target residual energy required by the environment temperature can be determined according to the preset target driving motor power, the battery is charged, driving power is provided for the driving motor of the vehicle, and the performance requirements of the vehicle driving motor are fully met.

The above description is only an overview of the technical solutions of the present application, and the present application may be implemented in accordance with the content of the description in order to make the technical means of the present application more clearly understood, and the following detailed description of the present application is given in order to make the above and other objects, features, and advantages of the present application more clearly understandable.

Drawings

Fig. 1 is a flowchart of a control method for an extended range vehicle according to an embodiment of the present disclosure;

fig. 2 is a flowchart of another control method for an extended range vehicle according to an embodiment of the present disclosure;

fig. 3 is a schematic diagram of an exemplary preset charging benefit curve according to an embodiment of the present application;

fig. 4 is a block diagram illustrating a control apparatus of an extended range vehicle according to an embodiment of the present disclosure;

fig. 5 is a block diagram of a control device of another extended range vehicle according to an embodiment of the present disclosure.

Detailed Description

Exemplary embodiments of the present application will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

The embodiment of the present application provides a method for controlling an extended range vehicle, as shown in fig. 1, the following steps are provided for the embodiment of the present application:

101. the current remaining capacity of the vehicle battery is acquired.

The scheme provided by the embodiment of the application is suitable for a vehicle running application scene or a vehicle parking application scene, and the core of the scheme provided by the embodiment of the application is as follows: according to the low-temperature environment of the vehicle and the current residual capacity, the power requirement of a certain preset target driving motor is further judged to be met, and the adaptive target residual capacity is needed to meet the power requirement of the driving motor.

102. And judging whether the current residual electric quantity is reduced to a preset initial electric quantity balance point.

The preset initial electric quantity balance point is obtained according to a large amount of historical experimental data. Because the charging scene that this application embodiment provided does not utilize electric automobile's the charging of filling electric pile to carry out, but relies on electric automobile's self-charging function, consequently must consider other many factors such as oil consumption.

Illustratively, the preset initial charge balance point is set to 50% of the remaining charge, which functions as: and measuring the charging income condition. For example: for the power provided for the driving motor, besides the power provided by the range extender discharging, for the power provided by the battery discharging, as the battery is charged so that the residual capacity of the battery is increased, the discharging power provided by the battery is gradually increased, but the increasing coefficient is gradually gentle; for example, when the remaining capacity of the battery reaches 50%, even if the battery is recharged, the discharge power that the battery can provide increases but gradually becomes gentle, and then the recharging is performed more, and in fact, the profit is sharply reduced in consideration of various factors such as fuel consumption, and the economical efficiency is also deteriorated.

By taking the above into consideration, with the solution provided in the embodiment of the present application, it is actually ensured that the vehicle has a remaining capacity not higher than the preset initial capacity balance point every time of charging, so that the power consumption, economy, and the like are also most suitable in terms of cost performance.

In addition, it should be noted that, for different vehicles, the power required for fully developing the performance of the driving motor in a low-temperature environment is different, that is, the target discharge power to be provided is different, and for the same vehicle, the driving motor may be set to correspond to different power requirements in a low-temperature environment. However, regardless of the power demand, when the vehicle has a remaining capacity that is reduced to a preset initial capacity balance point, the vehicle is equivalent to being able to satisfy these various power demands at the maximum cost performance in a low-temperature environment.

103. And if the current residual electric quantity is not reduced to the preset initial electric quantity balance point, judging whether the environment temperature of the vehicle is less than or equal to a preset low-temperature threshold value.

For example, the embodiments of the present application provide that the preset low temperature threshold is "zero degrees".

104. And if the environment temperature of the vehicle is judged to be less than or equal to the preset low-temperature threshold, determining the target residual electric quantity correspondingly required at the environment temperature according to the preset target driving motor power corresponding to the vehicle.

105. And controlling the charging of the vehicle by taking the target residual capacity as a demand so as to provide driving power for a driving motor of the vehicle.

In the embodiment of the present application, in conjunction with steps 103-105, after the preset initial charge balance point is determined, for example, the remaining charge is 50%, that is, the vehicle is charged to the remaining charge of 50%, which can satisfy the requirement of the driving motor to fully exert power in the low temperature environment. But for each vehicle, the remaining charge (i.e., say 50%) that the vehicle ensures for charging is determined with a uniform criterion (i.e., initial charge balance point), which is also unnecessary for some vehicles, and if all are so operated, the charging operation is rather made less flexible and the charging yield is not necessarily optimal.

Accordingly, when the current remaining capacity is judged not to be reduced to the preset initial capacity balance point and the vehicle is judged to be in a low-temperature environment (such as below zero), the target remaining capacity required by the vehicle is further determined according to the preset target driving motor power corresponding to each different vehicle. If the required target residual electric quantity is smaller than the preset initial electric quantity balance point, the smaller residual electric quantity meeting the requirement can be obtained at lower charging cost so as to meet the requirement of fully exerting power of the driving motor; however, if the required target remaining capacity is greater than or equal to the preset initial capacity balance point, the required target remaining capacity should be discarded, and the required remaining capacity is charged according to the preset initial capacity balance point, so as to avoid consuming unnecessary charging cost.

Therefore, the method is suitable for the preset target driving motor power corresponding to different vehicles, or further, different preset target driving motor powers can be correspondingly set for the same vehicle. The method and the device can determine the adaptive required target residual electric quantity, realize flexible charging of the vehicle, and meet the requirement of fully playing the performance of the vehicle driving motor under the condition of considering the charging benefit.

In the embodiment of the present application, when it is determined that the current remaining power of the vehicle is reduced to the preset initial power balance point, it is further determined whether the vehicle is in the preset low-temperature environment, and if so, the target remaining power required at the environmental temperature is immediately determined according to the power of the preset target driving motor corresponding to the vehicle, so that the target remaining power is timely controlled to be charged to the vehicle as a demand, and the driving power is provided to the driving motor of the vehicle. The scheme provided by the application can effectively avoid the situation that the vehicle is continuously in the low-temperature low-residual-energy condition, and further effectively avoid the situation that the range extender cannot be charged due to the low temperature of the battery core. Compared with the prior art, the technical problem that performance requirements of a vehicle driving motor are difficult to meet due to the fact that the vehicle is at a low temperature and low in residual capacity is solved, the scheme provided by the embodiment of the application can be suitable for different environment temperatures, the target residual capacity required by the environment temperature can be determined according to the preset target driving motor power, the battery is guaranteed to be charged, driving power is provided for the driving motor of the vehicle, and the performance requirements of the vehicle driving motor are fully met.

Further, for a more detailed explanation, the embodiment of the present application provides another control method for an extended range vehicle, as shown in fig. 2, the following specific steps are provided for the embodiment of the present application:

201. the current remaining capacity of the vehicle battery is acquired.

202. And judging whether the current residual electric quantity is reduced to a preset initial electric quantity balance point.

In the embodiment of the present application, for the explanation of the steps 201 to 202, refer to steps 101 to 102, which are not described herein again.

203. And if the current residual electric quantity is not reduced to the preset initial electric quantity balance point, judging whether the environment temperature of the vehicle is less than or equal to a preset low-temperature threshold value.

204. And if the environmental temperature of the vehicle is judged to be less than or equal to the preset low-temperature threshold, determining the target residual capacity correspondingly required at the environmental temperature according to the preset target driving motor power corresponding to the vehicle.

In the embodiment of the present application, the present step may be refined to include the following steps:

firstly, subtracting a preset discharging power upper limit value of a range extender from a preset target driving motor power to obtain a target discharging power correspondingly required by a vehicle battery;

and secondly, determining a battery cell lower limit temperature value of the vehicle battery according to the environment temperature of the vehicle.

Moreover, through looking for a plurality of preset charging income curves corresponding to the preset electric core temperature values, acquiring a target charging income curve corresponding to the electric core lower limit temperature value, wherein the target income curve comprises different preset residual capacities reached by battery charging and a mapping relation between preset discharging powers of the corresponding batteries.

And finally, searching the target residual electric quantity which is required for realizing the corresponding target discharge power and is obtained by charging the battery from the target charging income curve according to the mapping relation.

In the embodiment of the present application, a schematic diagram of a preset charging profit curve is illustrated as shown in fig. 3, and the preset charging curve indicates: under a certain low-temperature environment, obtaining a mapping relation between the residual electric quantity obtained by charging and the target discharge power corresponding to the vehicle battery; as shown in fig. 3, each curve corresponds to a low temperature environment (e.g., -5 degrees, -10 degrees, -15 degrees, etc.), and based on the curves, it can be found that the remaining power is at most 50% of the location, and each curve is smooth (i.e., the charging yield corresponding to the location of 50% is reduced sharply), and actually, the location of 50% is the preset initial power balance point referred to in the embodiment of the present application.

Further analyzing fig. 3, it is exemplified that the target discharge power is "80kw" (i.e., the vertical coordinate in fig. 3 corresponds to the horizontal straight line of the position of "80 kw"), i.e., the preset target drive motor power of the vehicle drive motor, as shown in fig. 3, when the vertical coordinate is selected as "80kw", the intersections with the respective curves may be selected to be different corresponding to different curves (i.e., in different low-temperature environments), and the intersection on each curve is the target remaining capacity required to adapt to the low-temperature environment.

Further, the embodiments of the present application provide the following preferred embodiments: judging whether the target residual electric quantity is greater than or equal to a preset initial electric quantity balance point or not; and if so, taking the electric quantity value corresponding to the preset initial electric quantity balance point as the target residual electric quantity.

For example, still referring to fig. 3 for analysis, for the curve (-30 degrees), if there is no cross point in the graph, the required remaining capacity is determined based on the preset initial capacity balancing point, so as to avoid charging yield too low and unnecessary charging cost.

205. And charging the vehicle by taking the target residual capacity as a demand so as to provide driving power for a driving motor of the vehicle.

In the embodiment of the present application, the above steps 201 to 205 are control strategies for charging the vehicle in a low-temperature environment. Further, in order to prevent overcharge and prevent a vehicle from falling down in a low residual capacity condition in a low temperature environment, the following steps are provided in the embodiments of the present application for explanation.

206. If the battery core temperature is detected to be smaller than or equal to the preset low-temperature threshold, judging whether the current residual capacity is larger than a first preset residual capacity threshold or not in the discharging process of the vehicle battery.

It should be noted that when the vehicle is in a low-temperature environment, the ambient low temperature and the battery cell temperature are not necessarily consistent, for example: when the vehicle is powered on, the temperature of the battery cell is heated up in the running process of the vehicle, but if the vehicle is parked without driving the vehicle later (namely, the vehicle is powered off), the temperature of the battery cell is finally reduced to be consistent with the ambient temperature due to the low temperature of the external environment. Accordingly, in order to control the vehicle more accurately, the scheme of "preventing overcharge or preventing groveling" provided in the embodiments of the present application is triggered to start based on the battery cell temperature being equal to or lower than the preset low temperature threshold. Also, if the battery cell temperature is less than or equal to the preset low temperature threshold, step 206 and the following steps are performed, but if the battery cell temperature is greater than the preset low temperature threshold, then step 206 and the following steps need not be performed, and for example, the preset low temperature threshold may be "zero degrees".

It should be further noted that, since the entire battery pack is composed of a plurality of battery cells, the parameter data of the entire battery pack includes the highest battery cell temperature, the lowest battery cell temperature, and the average battery cell temperature, and in order to describe the vehicle control scheme provided in the embodiments of the present application more accurately, the "battery cell temperature" in the embodiments of the present application refers to the lowest battery cell temperature in the battery pack.

In the embodiment of the application, three charging scenarios are further refined by using the first preset remaining power threshold and the second preset remaining power threshold, and it should be noted that the three charging scenarios are all in a low-temperature environment, such as below zero degrees.

Exemplarily, assuming that the first preset remaining capacity value is 20% and the second preset remaining capacity value is 5%, three charging scenarios are obtained: the residual capacity is more than 20%; the residual capacity is between 5% and 20%; the remaining capacity is below 5%, wherein the value boundary can be further defined as which charging scenario to classify according to the actual demand, and no special limitation is required herein.

207a, if the current residual capacity is judged to be larger than a first preset residual capacity threshold value, controlling the upper limit value of the generated power of the range extender to be equal to the sum of the upper limit value of the charging power of the battery cell of the vehicle and the consumed power of the vehicle accessories, and controlling the driving motor to provide driving power by the upper limit value of the generated power of the driving motor.

In this embodiment of the present application, in an application scenario where "the remaining power is greater than 20%", the remaining power is still sufficient, so the driving motor is controlled to provide driving power at the upper limit of the generated power of the driving motor, but since the battery cell charging power may decrease in a low-temperature environment, the upper limit of the generated power of the range extender is controlled to be equal to the sum of the upper limit of the battery cell charging power of the vehicle battery and the power consumed by the vehicle accessory, so as to charge the battery, so as to avoid overcharging.

207b, in the discharging process of the vehicle battery, if the current residual capacity is not larger than a first preset residual capacity threshold, judging whether the current residual capacity is larger than a second preset residual capacity threshold, wherein the second preset residual capacity threshold is smaller than the first preset residual capacity threshold.

208bc, if the current residual capacity is judged to be larger than the second preset residual capacity threshold value, controlling the upper limit value of the generating power of the range extender to be equal to the sum of the upper limit value of the charging power of the battery cell of the vehicle and the consumed power of the vehicle accessories, and obtaining the target generating power corresponding to the range extender.

209bc, the self electric power upper limit value of the control drive motor is reduced to reach the same value with the target generated power along with the gradual reduction of the current residual capacity.

In this embodiment of the application, the steps 207b, 208bc and 209bc are application scenarios such as "the remaining capacity is between 5% and 20% (for example, including the boundary)", the remaining capacity is insufficient, so that the electric power of the driving motor needs to be linearly reduced along with the reduction of the remaining capacity, and the electric power needs to be reduced to be not more than the power generated by the range extender, so as to avoid that the driving motor consumes too fast power and gradually lacks power, which leads to the vehicle lying down in the pit.

208bd, and in the discharging process of the vehicle battery, if the current residual capacity is not larger than a second preset residual capacity threshold value, controlling the upper limit value of the generated power of the range extender to be equal to the target generated power.

209bd, the drive motor is controlled to have its own generated power upper limit value equal to the target generated power.

In this embodiment of the application, this step 208bd and 209bd are for if "the residual capacity is at the application scene below 5%", and the electric quantity residual is serious not enough, so direct control increases journey ware generated power upper limit value and equals target generated power, prevent overcharging, to the battery loss, and control driving motor and equal to target generated power with self generated power upper limit value, need reduce to being not more than increase journey ware generated power, in order to avoid driving motor power consumptive too fast, power is not enough gradually, lead to the vehicle to lie prone.

Further, as an implementation of the method shown in fig. 1 and fig. 2, the embodiment of the present application provides a control device for an extended range vehicle. The embodiment of the apparatus corresponds to the embodiment of the method, and for convenience of reading, details in the embodiment of the apparatus are not repeated one by one, but it should be clear that the apparatus in the embodiment can correspondingly implement all the contents in the embodiment of the method. The device is applied to satisfy the performance requirement of the vehicle driving motor, and specifically as shown in fig. 4, the device comprises:

an acquisition unit 301 configured to acquire a current remaining power of a vehicle battery;

a determining unit 302, configured to determine whether the current remaining power is reduced to a preset initial power balance point;

the determining unit 302 is further configured to determine whether the ambient temperature of the vehicle is less than or equal to a preset low-temperature threshold value if the current remaining power is not reduced to a preset initial power balance point;

a determining unit 303, configured to determine, according to a preset target driving motor power corresponding to the vehicle, a target remaining power required at the ambient temperature if the ambient temperature of the vehicle is less than or equal to a preset low-temperature threshold;

a first control unit 304, configured to control charging to the vehicle with the target remaining capacity as a demand to provide driving power to a driving motor of the vehicle.

Further, as shown in fig. 5, the determining unit 303 includes:

the first obtaining module 3031 is configured to subtract a preset upper limit value of discharge power of the range extender from a preset target drive motor power to obtain a target discharge power required by the vehicle battery correspondingly;

the determining module 3032 is configured to determine a lower limit temperature value of a battery cell of the vehicle battery according to the temperature of the environment where the vehicle is located;

a second obtaining module 3033, configured to obtain a target charging revenue curve corresponding to the lower limit temperature value of the electrical core by searching for a preset charging revenue curve corresponding to each of a plurality of preset electrical core temperature values, where the target revenue curve includes a mapping relationship between different preset remaining electric quantities obtained by charging the battery and preset discharge powers of the battery correspondingly provided;

a searching module 3034, configured to search, according to the mapping relationship, a target remaining electric quantity, which is obtained by battery charging required to achieve the target discharge power, from the target charging income curve.

Further, as shown in fig. 5, before the charging the vehicle with the target remaining capacity as the demand control to provide the driving power to the driving motor of the vehicle, the apparatus further includes:

the determining unit 302 is further configured to determine whether the target remaining power is greater than or equal to the preset initial power balance point;

a discarding unit 305, configured to discard the determined required target remaining power if it is determined that the target remaining power is greater than or equal to the preset initial power balance point;

the determining unit 303 is further configured to determine a new target remaining power according to the electric quantity value corresponding to the preset initial electric quantity balance point, so as to charge the vehicle.

Further, as shown in fig. 5, if it is detected that the temperature of the battery cell is reduced to be less than or equal to the preset low temperature threshold, the apparatus further includes:

the determining unit 302 is further configured to determine whether the current remaining power is greater than a first preset remaining power threshold in a discharging process of a vehicle battery;

the second control unit 306 is configured to control the upper limit of the generated power of the range extender to be equal to the sum of the upper limit of the charging power of the battery cell of the vehicle battery and the power consumed by the vehicle accessory if it is determined that the current remaining power is greater than the first preset remaining power threshold;

and a third control unit 307, configured to control the driving motor to provide driving power according to the upper limit of the generated power of the driving motor.

Further, as shown in fig. 5, the apparatus further includes:

the determining unit 302 is further configured to determine whether the current remaining power is greater than a second preset remaining power threshold in a discharging process of a vehicle battery, if the current remaining power is not greater than the first preset remaining power threshold, where the second preset remaining power threshold is smaller than the first preset remaining power threshold;

a fourth control unit 308, configured to control the upper limit of the power generation power of the range extender to be equal to the sum of the upper limit of the charging power of the battery cell of the vehicle and the power consumption of the vehicle accessory if it is determined that the current remaining power is greater than a second preset remaining power threshold, so as to obtain a target power generation power corresponding to the range extender;

a fifth control unit 309 configured to control the self electric power upper limit value of the drive motor to decrease to reach the same value as the target generated power as the current remaining amount gradually decreases.

Further, as shown in fig. 5, the apparatus further includes:

a sixth control unit 310, configured to, in a discharging process of a vehicle battery, control an upper limit value of generated power of a range extender to be equal to the target generated power if the current remaining power is not greater than the second preset remaining power threshold;

a seventh control unit 311 for controlling the driving motor to make the upper limit value of the generated power of the driving motor equal to the target generated power.

In summary, the present application provides a method and an apparatus for controlling a range-extended vehicle, where the method further determines whether the vehicle is in a preset low-temperature environment when it is determined that the current remaining power of the vehicle is less than a preset initial power balance point, and if so, immediately determines a target remaining power required at the environment temperature according to a preset target driving motor power, so as to timely control charging of the vehicle according to the target remaining power to provide driving power for a driving motor of the vehicle. The scheme provided by the application can effectively avoid the situation that the vehicle is continuously in the low-temperature low-residual-power condition, and further avoid the situation that the range extender cannot be charged due to the low temperature of the battery cell. The technical problem of be difficult to effectively be in under the low residual capacity condition of low temperature and lead to being difficult to satisfy vehicle driving motor performance demand at the vehicle is solved, the scheme that this application provided can be applicable to different ambient temperature, and can be according to predetermineeing target driving motor power, confirm to be applicable to the required target residual capacity of this ambient temperature, and ensure to charge to the battery in time, then ensured to provide driving power to the driving motor of vehicle, in order to satisfy vehicle driving motor performance demand, and on this basis, this application embodiment still provides the scheme that prevents to charge under the low residual capacity condition of low temperature and overcharge, the vehicle is lain prone.

The control of the extended range vehicle provided by the embodiment of the application comprises a processor and a memory, and the acquisition unit and the judgment unit _、 The determining unit, the first control unit and the like are stored in the memory as program units, and the processor executes the program units stored in the memory to realize corresponding functions.

The processor comprises a kernel, and the kernel calls the corresponding program unit from the memory. The kernel can be provided with one or more than one, and the solution for improving the vehicle power in a low-temperature environment is provided by adjusting the kernel parameters.

An embodiment of the application provides a computer-readable storage medium, on which a computer program is stored, which, when executed by a processor, implements the control method of an extended range vehicle as described above.

An embodiment of the present application provides an electronic device, including: the system comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor executes the computer program to realize the control method of the extended range vehicle.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

In a typical configuration, a device includes one or more processors (CPUs), memory, and a bus. The device may also include input/output interfaces, network interfaces, and the like.

The memory may include volatile memory in a computer readable medium, random Access Memory (RAM) and/or nonvolatile memory such as Read Only Memory (ROM) or flash memory (flash RAM), and the memory includes at least one memory chip. The memory is an example of a computer-readable medium.

Computer-readable media, including both permanent and non-permanent, removable and non-removable media, may implement the information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.

It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional identical elements in the process, method, article, or apparatus comprising the element.

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and so forth) having computer-usable program code embodied therein.

The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A control method of an extended range vehicle, characterized by comprising:

acquiring the current residual capacity of a vehicle battery;

and controlling the charging of the vehicle by taking the target residual capacity as a demand so as to provide driving power for a driving motor of the vehicle.

2. The method according to claim 1, wherein the determining a target remaining capacity corresponding to the required ambient temperature according to a preset rated power demand of the driving motor corresponding to the vehicle comprises:

3. The method according to claim 1, wherein before the charging the vehicle with the target remaining amount as the demand control to provide driving power to a drive motor of the vehicle, the method further comprises:

4. The method of any one of claims 1 to 3, wherein if it is detected that the battery cell temperature decreases to less than or equal to the preset low temperature threshold, the method further comprises:

and controlling the driving motor to provide driving power by the upper limit value of the self generated power.

5. The method of claim 4, further comprising:

if so, controlling the upper limit value of the generated power of the range extender to be equal to the sum of the upper limit value of the charging power of the battery cell of the vehicle and the consumed power of the vehicle accessories, and obtaining the target generated power corresponding to the range extender;

6. The method of claim 5, further comprising:

7. A control device of an extended range vehicle, characterized by comprising:

and the first control unit is used for charging the vehicle by taking the target residual capacity as demand control so as to provide driving power for a driving motor of the vehicle.

8. The apparatus of claim 7, wherein the determining unit comprises:

the second acquisition module is used for acquiring a target charging income curve corresponding to the lower limit temperature value of the battery cell by searching a preset charging income curve corresponding to each of a plurality of preset battery cell temperature values, wherein the target income curve comprises a mapping relation between different preset residual electric quantities reached by battery charging and preset discharging power of a corresponding battery;

9. A computer-readable storage medium, characterized in that a computer program is stored thereon, which computer program, when being executed by a processor, realizes the control method of the extended range vehicle according to any one of claims 1 to 6.

10. An electronic device, comprising: memory, a processor and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing a method of controlling an extended range vehicle as claimed in any one of claims 1 to 6.