CN112455248B - Control method and device of range extender - Google Patents
Control method and device of range extender Download PDFInfo
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- CN112455248B CN112455248B CN201910842328.0A CN201910842328A CN112455248B CN 112455248 B CN112455248 B CN 112455248B CN 201910842328 A CN201910842328 A CN 201910842328A CN 112455248 B CN112455248 B CN 112455248B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
- B60L50/61—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles
- B60L50/62—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles charged by low-power generators primarily intended to support the batteries, e.g. range extenders
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Abstract
The embodiment of the disclosure discloses a control method and a control device of a range extender, relates to the technical field of electric vehicles, and can solve the problem that the charging frequency of the existing electric vehicle needs to be improved in winter. The method provided by the embodiment of the disclosure comprises the steps of obtaining a maximum SOC (state of charge) reduction value which is caused by each driving and is expected under the starting of a range extender, a minimum SOC value allowed when a power battery is charged and the driving times required by a user; and determining the corresponding SOC value when the range extender is started under the condition that a preset driving condition is met according to the SOC maximum descending value, the minimum SOC value and the driving times, wherein the preset driving condition is that the vehicle can drive at least the driving times without charging. The embodiment of the disclosure is mainly applicable to a scene of realizing automatic control of the range extender in a low-temperature environment.
Description
Technical Field
The embodiment of the disclosure relates to the technical field of electric vehicles, in particular to a control method and device of a range extender.
Background
In order to improve the environment, a vehicle that converts electric energy into kinetic energy, i.e., an electric vehicle, has been invented. However, the electric vehicle has a relatively poor cruising ability compared to a common fuel vehicle. In order to reduce the charging times, people also invent an extended range electric vehicle, which can use an extended range device to generate electricity to charge a power battery and increase the endurance mileage. Specifically, a fixed SOC (state of charge) value is set as a starting condition of the range extender, that is, when the remaining capacity of the power battery reaches the SOC value, the range extender is started and then generates power to charge the power battery.
However, when entering cold winter, the temperature of the power battery is also low, and the chargeable power of the power battery is also reduced in order to ensure the service life of the power battery. In order to avoid the power battery from being overcharged, the generated power of the range extender is reduced along with the overcharging. Before the power battery reaches the proper temperature, when the generated power of the range extender is not enough to maintain the driving of the vehicle, the power battery is required to be discharged to the outside. Therefore, if the user drives the vehicle at a short distance and cannot supplement the electric quantity of the power battery by generating electricity through the range extender after the temperature of the power battery rises, the power battery needs to be discharged to the outside to maintain the driving of the vehicle in each driving, and the electric quantity of the power battery is reduced after each driving. In order to avoid the influence on the use of the vehicle due to the low electric quantity of the power battery, the charging frequency in winter needs to be increased by a user, so that the use difficulty of the vehicle is increased for the user who is inconvenient to charge.
Disclosure of Invention
In view of this, embodiments of the present disclosure provide a method and an apparatus for controlling a range extender, which aim to solve a problem that a charging frequency of an existing electric vehicle needs to be increased in winter.
The embodiment of the disclosure mainly provides the following technical scheme:
in a first aspect, an embodiment of the present disclosure provides a method for controlling a range extender, where the method includes:
acquiring a maximum SOC (state of charge) reduction value caused by one-time driving expected under the starting of a range extender, a minimum SOC value allowed when a power battery is charged and the driving times required by a user;
and determining the corresponding SOC value when the range extender is started under the condition that a preset driving condition is met according to the SOC maximum descending value, the minimum SOC value and the driving times, wherein the preset driving condition is that the vehicle can drive at least the driving times under the condition of not charging.
In some embodiments, before determining the corresponding SOC value at the time of starting the range extender when the preset running condition is satisfied according to the maximum SOC drop value, the minimum SOC value, and the number of running times, the method further includes:
acquiring user charging frequency;
judging whether the user charging frequency is smaller than a preset charging frequency threshold value or not;
according to the maximum SOC value, the minimum SOC value and the running times, the SOC value corresponding to the starting of the range extender is determined to comprise the following steps:
when the user charging frequency is smaller than the preset charging frequency threshold value, determining a corresponding SOC value when the range extender is started under the condition of meeting preset driving conditions according to the SOC maximum descending value, the minimum SOC value and the driving times.
In some embodiments, said obtaining a user charging frequency comprises:
acquiring the total charge amount of the power battery in N times of driving and the total power consumption of power consumption parts in N times of driving; the N is a positive integer, and the power consumption parts comprise parts in a vehicle except the power battery and the range extender;
taking a ratio of the total charge amount to the total power consumption as the user charging frequency.
In some embodiments, obtaining a predicted maximum decrease in state of charge (SOC) for a trip at range extender start comprises:
acquiring an average power consumption interval with the highest frequency, the MAP (range extender) power generation, the target temperature and the heating time in the N driving processes; the N is a positive integer, the target temperature is the temperature of the power battery when the power generation power of the range extender is balanced with the power consumed by the vehicle, and the heating time is the heating time required by the power battery when the lowest temperature of the current area where the range extender is located reaches the target temperature;
calculating the generated energy of the range extender according to the generated power and the heating time of the MAP generated by the range extender at each temperature point between the lowest temperature and the target temperature;
calculating the maximum actual electric quantity consumed according to the maximum power consumption and the heating time in the average power consumption interval;
and determining the maximum SOC reduction value caused by one-time driving predicted under the starting of the range extender according to the power generation amount of the range extender and the maximum actual power consumption.
In some embodiments, obtaining the target temperature during N travels comprises:
and determining the target temperature of the power battery when the power generated by the range extender is balanced with the power consumed by the vehicle according to the average power consumption interval with the highest frequency, the average vehicle speed interval with the highest frequency, the power battery charging MAP and the range extender power generation MAP in the N driving processes.
In some embodiments, obtaining the warm-up time comprises, during the N travels:
and determining the heating time required by the power battery when the power battery reaches the target temperature from the lowest temperature according to the temperature difference value between the target temperature and the lowest temperature and the heating rate of the power battery.
In some embodiments, obtaining the maximum decrease value of the state of charge SOC caused by one driving predicted at the start of the range extender, the minimum SOC value allowed when charging the power battery, and the number of driving times required by the user includes:
when a first preset condition is met, acquiring a maximum SOC (state of charge) reduction value caused by one-time driving predicted by starting a range extender, a minimum SOC value allowed when a power battery is charged and the driving times required by a user;
the first preset condition comprises at least one of the following:
and receiving a starting instruction for automatically adjusting the starting mode of the range extender, and determining that the highest temperature of the day is smaller than a first preset temperature threshold.
In some embodiments, the method further comprises:
when a second preset condition is met, determining the SOC value corresponding to the starting of the range extender as a default SOC value;
the second preset condition comprises at least one of the following:
and receiving a closing instruction for automatically adjusting the starting mode of the range extender, and determining that the lowest temperature of the current day is greater than a second preset temperature threshold value.
In a second aspect, an embodiment of the present disclosure provides a control device of a range extender, the device including:
the system comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring a maximum SOC (state of charge) reduction value caused by one-time driving predicted by starting a range extender, a minimum SOC value allowed when a power battery is charged and the driving times required by a user;
and the determining unit is used for determining the corresponding SOC value when the range extender is started under the condition that a preset running condition is met according to the SOC maximum descending value, the SOC minimum descending value and the running times, wherein the preset running condition is that the vehicle can run at least the running times under the condition of not charging.
In some embodiments, the obtaining unit is further configured to obtain a user charging frequency before determining, according to the maximum SOC drop value, the minimum SOC value, and the number of times of driving, a corresponding SOC value when the range extender is started when a preset driving condition is met;
the device further comprises:
the judging unit is used for judging whether the user charging frequency is smaller than a preset charging frequency threshold value or not;
the determining unit is configured to determine, when the user charging frequency is smaller than the preset charging frequency threshold, a corresponding SOC value when the range extender is started when a preset driving condition is met according to the maximum SOC drop value, the minimum SOC value, and the driving frequency.
In some embodiments, the obtaining unit includes:
the first acquisition module is used for acquiring the total charging amount for the power battery in N times of driving and the total power consumption of power consumption parts in N times of driving; the N is a positive integer, and the power consumption parts comprise parts in a vehicle except the power battery and the range extender;
a first determination module to determine a ratio of the total charge to the total electricity consumption as the user charging frequency.
In some embodiments, the obtaining unit includes:
the second acquisition module is used for acquiring the average consumed power interval with the highest frequency, the range extender power generation MAP, the target temperature and the heating time in the N driving processes; the N is a positive integer, the target temperature is the temperature of the power battery when the power generation power of the range extender is balanced with the power consumed by the vehicle, and the heating time is the heating time required by the power battery when the lowest temperature of the current area where the range extender is located reaches the target temperature;
the first calculation module is used for calculating the power generation amount of the range extender according to the power generation power and the heating time of the MAP at each temperature point between the lowest temperature and the target temperature;
the second calculation module is used for calculating the maximum actual electric quantity consumed according to the maximum power consumption and the heating time in the average power consumption interval;
and the second determination module is used for determining the maximum SOC reduction value caused by one-time running predicted under the starting of the range extender according to the power generation amount of the range extender and the maximum actual power consumption.
In some embodiments, the second obtaining module is configured to determine the target temperature of the power battery when the range extender generated power is balanced with the vehicle consumed power according to the average power consumption interval with the highest frequency, the average vehicle speed interval with the highest frequency, the power battery charging MAP, and the range extender generated power MAP during N driving processes.
In some embodiments, the second obtaining module is configured to determine, according to a temperature difference value between the target temperature and the minimum temperature and a heating rate of the power battery, a heating time required for the power battery to reach the target temperature from the minimum temperature.
In some embodiments, the obtaining unit is configured to obtain a maximum SOC reduction value due to one driving expected at the start of the range extender, a minimum SOC value allowed for charging the power battery, and a driving number required by a user, when a first preset condition is satisfied;
the first preset condition comprises at least one of the following:
and receiving a starting instruction for automatically adjusting the starting mode of the range extender, and determining that the highest temperature of the day is smaller than a first preset temperature threshold.
In some embodiments, the determining unit is configured to determine, as a default SOC value, an SOC value corresponding to the starting of the range extender when a second preset condition is satisfied;
the second preset condition comprises at least one of the following:
and receiving a closing instruction for automatically adjusting the starting mode of the range extender, and determining that the lowest temperature of the day is greater than a second preset temperature threshold.
In a third aspect, an embodiment of the present disclosure provides a storage medium, where the storage medium includes a stored program, and when the program runs, a device on which the storage medium is located is controlled to execute the control method of the range extender described in the first aspect.
In a fourth aspect, an embodiment of the present disclosure provides a control apparatus of a range extender, the apparatus including a storage medium; and one or more processors, the storage medium coupled with the processors, the processors configured to execute program instructions stored in the storage medium; the program instructions are executed to execute the control method of the range extender of the first aspect.
In a fifth aspect, embodiments of the present disclosure provide a vehicle comprising the apparatus of the fourth aspect.
By means of the technical scheme, compared with the SOC value corresponding to the fixed range extender in the prior art, the control method and the control device for the range extender provided by the embodiment of the disclosure can firstly acquire the maximum SOC drop value caused by one expected trip when the range extender is started, the minimum SOC value allowed when the power battery is charged and the number of running times required by a user, and then determine the SOC value corresponding to the range extender when the range extender is started according to the maximum SOC drop value, the minimum SOC value and the number of running times, so that when the range extender is started based on the determined SOC value, a vehicle can run the number of running times without charging without increasing the charging frequency.
The foregoing description is only an overview of the embodiments of the present disclosure, and in order to make the technical means of the embodiments of the present disclosure more clearly understood, the embodiments of the present disclosure may be implemented in accordance with the content of the description, and in order to make the foregoing and other objects, features, and advantages of the embodiments of the present disclosure more clearly understood, the following detailed description of the embodiments of the present disclosure is given.
Drawings
Various additional advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the embodiments of the disclosure. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 shows a flowchart of a control method of a range extender provided by an embodiment of the present disclosure;
fig. 2 is a flowchart illustrating another control method of a range extender provided by an embodiment of the disclosure;
fig. 3 is a block diagram illustrating a control apparatus of a range extender provided in an embodiment of the present disclosure;
fig. 4 shows a block diagram of another control device of a range extender provided in an embodiment of the present disclosure.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure 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.
In a first aspect, an embodiment of the present disclosure provides a method for controlling a range extender, where as shown in fig. 1, the method mainly includes:
101. the maximum SOC reduction value caused by one-time driving predicted under the starting of the range extender, the minimum SOC value allowed when the power battery is charged and the driving times required by a user are obtained.
In cold winter, when a user drives a vehicle at a short distance and cannot supplement the electric quantity of the power battery through power generation of the range extender after the temperature of the power battery rises, the power battery needs to be discharged outwards to maintain vehicle driving every time of driving, so that the electric quantity of the power battery is reduced after every driving, and further the charging frequency is improved. In order to reduce the charging frequency, the example of the disclosure needs to determine a maximum decrease value of the SOC caused by one driving expected under the starting of the range extender (i.e. a maximum decrease value of the power battery capacity caused by one driving is estimated), a minimum SOC value allowed when the power battery is charged (i.e. a remaining capacity when the power battery must be charged), and a driving number required by the user (i.e. in the case of charging, a driving number capable of driving, for example, when the user wants to drive twice a day without charging a week, the driving number required by the user is 14), and then execute step 102 according to these information.
The maximum SOC drop value may be calculated according to a historical driving record, specifically referring to the detailed description of step 201. The minimum SOC value is a minimum SOC value allowed for charging a power battery set for the vehicle by a technician according to an actual situation before the vehicle leaves a factory. The driving times required by the user are calculated according to the historical driving records, that is, the average driving times of the user in a preset time period (such as one week) are counted according to the historical driving records, and the average driving times are taken as the driving times required by the user.
102. And determining the corresponding SOC value when the range extender starts under the condition of meeting the preset running condition according to the SOC maximum descending value, the minimum SOC value and the running times.
Wherein the preset running condition is that the vehicle can be caused to run at least the running number of times without being charged. For example, when the corresponding SOC value at the time of starting the range extender is equal to or more than the number of travel times, the SOC maximum drop value + the minimum SOC value, the vehicle can be caused to travel at least the number of travel times without being charged. That is, when the range extender starts to be started from the SOC value calculated by the formula, after the user drives the vehicle for the number of times, the SOC value in the power battery is at most reduced to the minimum SOC value, and the whole process does not need to be charged, so that the driving requirement of the user for the number of times is met.
Compared with the SOC value corresponding to the starting of the fixed range extender in the prior art, the control method of the range extender provided by the embodiment of the disclosure can firstly acquire the maximum SOC drop value caused by one trip expected under the starting of the range extender, the minimum SOC value allowed when the power battery is charged and the running times required by a user, and then determine the SOC value corresponding to the starting of the range extender according to the maximum SOC drop value, the minimum SOC value and the running times, so that when the range extender is started based on the determined SOC value, the vehicle can run the running times without charging without increasing the charging frequency.
In a second aspect, according to the foregoing method embodiment, another embodiment of the present disclosure further provides a method for controlling a range extender, as shown in fig. 2, the method mainly includes:
201. the method comprises the steps of obtaining a user charging frequency, a maximum SOC (state of charge) reduction value caused by one-time driving predicted by starting a range extender, a minimum SOC value allowed when a power battery is charged and the driving times required by a user.
The specific calculation method of the user charging frequency comprises the following steps: acquiring the total charge amount of the power battery in N times of driving and the total power consumption of power consumption parts in N times of driving; the N is a positive integer, and the power consumption parts comprise parts in a vehicle except the power battery and the range extender; taking a ratio of the total charge amount to the total electricity consumption as the user charging frequency.
Specifically, when the situation that the state of the power battery jumps from the non-charging state to the charging state is detected, the residual capacity (starting capacity) of the power battery is recorded, when the situation that the state of the power battery jumps from the charging state to the non-charging state is detected, the residual capacity (ending capacity) of the power battery is recorded, the ending capacity of the power battery is subtracted from the starting capacity to obtain single-time charging capacity, and the total charging capacity is obtained by accumulating N single-time charging capacities. When the vehicle Control state enters a starting state, starting integrating the power of each part (except a power battery and a range extender) such as a driving motor and an Electronic Control Unit (ECU) on the basis of time until the vehicle Control state is in a stopping state, and obtaining the power consumption of each part; and summing the power consumption of all parts to obtain the total power consumption of the power-consuming parts in single driving, and accumulating the N total power consumption of single driving to obtain the total power consumption of N times of driving.
The specific calculation process of the maximum SOC drop value is as follows:
(a) and acquiring the average consumed power interval with the highest frequency, the range extender power generation MAP, the target temperature and the heating time in the N driving processes.
The heating time is the heating time required by the power battery when the lowest temperature of the current area where the range extender is located reaches the target temperature.
In the process of obtaining N driving times, the specific implementation manner of the average power consumption interval with the highest frequency may be: counting the running time, the running distance and the running energy consumption of each time in the N running processes; calculating the average speed of each running according to the running duration and the running distance, and determining the average speed interval with the highest frequency according to the average speed interval to which the average speed of each running belongs; and calculating the average energy consumption of each driving according to the driving distance and the driving energy consumption, determining the average energy consumption interval with the highest frequency according to the average energy consumption interval to which the average energy consumption of each driving belongs, and determining the average power consumption interval with the highest frequency according to the average vehicle speed interval with the highest frequency and the average energy consumption interval with the highest frequency.
The average vehicle speed of each running is the running distance/the running duration, and the preset average vehicle speed interval can comprise 30-40 km/h, 40-50 km/h … … 110-120 km/h and the like. The average energy consumption of each driving is the driving energy consumption/driving distance, and the preset average energy consumption interval can comprise 10-12 Kwh/100km, 12-14 Kwh/100km … … 28-30 Kwh/100 km. The average power consumption interval with the highest frequency is the average vehicle speed interval with the highest frequency and the average energy consumption interval with the highest frequency, and the average power consumption interval with the highest frequency is represented by an interval symbol, namely [ the minimum value in the average vehicle speed interval with the highest frequency is the minimum value in the average energy consumption interval with the highest frequency, and the maximum value in the average vehicle speed interval with the highest frequency is the maximum value in the average energy consumption interval with the highest frequency ].
The specific calculation method of the target temperature comprises the following steps: and determining the target temperature of the power battery when the power generated by the range extender is balanced with the power consumed by the vehicle according to the average power consumption interval with the highest frequency, the average vehicle speed interval with the highest frequency, the power battery charging MAP and the range extender power generation MAP in the N driving processes.
According to the average consumed power interval and the average vehicle speed interval, relevant power and temperature can be searched from the battery charging MAP and the range extender generating MAP, and the temperature when the range extender generating power is equal to the vehicle consumed power can be obtained.
In addition, the battery charging MAP and the range extender generating MAP are known quantities inside the software and can be obtained through experiments and simulation, wherein the battery charging MAP is a MAP or a table and the like comprising mapping relations among a plurality of parameters such as vehicle speed, power consumption, temperature and the like, and the range extender generating MAP is a MAP or a table and the like comprising mapping relations among a plurality of parameters such as vehicle speed, power generation, temperature and the like.
The specific calculation method of the heating time comprises the following steps: and determining the heating time required by the power battery when the minimum temperature reaches the target temperature according to the temperature difference value between the target temperature and the minimum temperature of the current area where the range extender is located and the heating rate of the power battery.
The heating time is the temperature difference value/battery heating rate, and the battery heating rate is the known quantity in the software and can be obtained by experiments and simulation.
(b) And calculating the power generation amount of the range extender according to the power generation power and the heating time of the MAP at each temperature point between the minimum temperature and the target temperature.
And integrating the generated power corresponding to the lowest temperature based on time, and stopping integrating until the generated power corresponding to the target temperature to obtain the generated energy of the range extender.
(c) And calculating the maximum actual consumed electric quantity according to the maximum consumed power and the heating time in the average consumed power interval.
(d) And determining the maximum SOC reduction value caused by one-time running predicted under the starting of the range extender according to the generated energy of the range extender and the maximum actual consumed electric quantity.
The maximum SOC reduction value caused by one-time driving predicted under the starting of the range extender is equal to the maximum actual electric quantity consumed-the electric quantity generated by the range extender.
202. Judging whether the user charging frequency is smaller than a preset charging frequency threshold value or not; if the charging frequency is less than the preset charging frequency threshold, executing step 203; otherwise, step 204 is performed.
When the charging frequency of the user is smaller than the preset charging frequency threshold, the charging frequency of the user for charging the vehicle is low, the vehicle is not charged frequently due to inconvenience and the like, and in order to enable the user to drive for a long time under the condition of less charging as much as possible and meet the basic driving requirement of the user, the corresponding SOC value of the range extender during starting can be adjusted; when the charging frequency of the user is greater than or equal to the preset charging frequency threshold, the charging frequency of the user for charging the vehicle is high, when the electric quantity of the power battery is low, the user can charge the vehicle by himself to meet the next driving requirement, and therefore the SOC value corresponding to the range extender when being started does not need to be adjusted, and the SOC value can be directly set as the default SOC value.
203. And determining the corresponding SOC value when the range extender starts under the condition of meeting the preset running condition according to the SOC maximum descending value, the minimum SOC value and the running times.
Wherein the preset running condition is that the vehicle can be caused to run at least the running number of times without being charged.
204. And determining the corresponding SOC value when the range extender is started as a default SOC value.
According to the control method of the range extender, when the charging frequency of a user is low, the SOC value corresponding to the starting of the range extender is determined according to the maximum SOC drop value, the minimum SOC value and the running frequency, so that when the range extender is started based on the determined SOC value, the vehicle can run for the running frequency under the condition of no charging without increasing the charging frequency, and when the charging frequency of the user is high, the driving of the vehicle is not influenced due to frequent charging of the user, so that the SOC value corresponding to the starting of the range extender is directly determined as the default SOC value, system resources are not consumed, and the SOC value is calculated by spending time.
In some embodiments, since the SOC value of the range extender at the time of starting needs to be adjusted automatically, system resources are consumed for calculation, and the vehicle itself is consumed, an automatic adjustment range extender starting mode button may be provided on the vehicle, so that a user may determine whether to start or stop the mode. In addition, when the temperature is low, the vehicle may need to be driven to run through the discharge of the power battery due to the low power generation of the range extender, and when the temperature is proper, the situation is not always caused, so that the automatic adjustment mode can be started when the temperature is relatively low. In order to implement the above functions, the specific implementation conditions of the step "obtaining the maximum decrease value of the state of charge SOC caused by one-time driving predicted when the range extender is started, the minimum SOC value allowed when the power battery is charged, and the driving times required by the user" may be: when a first preset condition is met, acquiring a maximum SOC (state of charge) reduction value caused by one-time driving predicted by starting a range extender, a minimum SOC value allowed when a power battery is charged and the driving times required by a user; the first preset condition comprises at least one of the following: and receiving a starting instruction for automatically adjusting the starting mode of the range extender, and determining that the highest temperature of the current day is less than a first preset temperature threshold. When a second preset condition is met, determining the SOC value corresponding to the starting of the range extender as a default SOC value; the second preset condition comprises at least one of the following: and receiving a closing instruction for automatically adjusting the starting mode of the range extender, and determining that the lowest temperature of the current day is greater than a second preset temperature threshold value.
If the user drives in winter for the first time and no historical driving behavior data exist, the user selects to start the starting mode of the automatic adjustment range extender, the corresponding SOC point value when the range extender is started is kept as the default SOC value, and after the user is charged for at least M times (such as 5 times), the corresponding SOC point value when the range extender is started is updated according to the data statistical result.
In a third aspect, according to the above method embodiment, another embodiment of the present disclosure further provides a control device of a range extender, as shown in fig. 3, the device includes:
an obtaining unit 31, configured to obtain a maximum decrease value of the state of charge SOC due to one driving expected when the range extender is started, a minimum SOC value allowed when the power battery is charged, and a driving frequency required by a user;
a determining unit 32, configured to determine, according to the maximum SOC drop value, the minimum SOC value, and the number of driving times, an SOC value corresponding to when the range extender is activated when a preset driving condition is satisfied, where the preset driving condition is that the vehicle can be driven at least the number of driving times without charging.
In some embodiments, the obtaining unit 31 is further configured to obtain a user charging frequency before determining, according to the maximum SOC drop value, the minimum SOC value, and the number of driving times, a corresponding SOC value when the range extender is started when a preset driving condition is met;
as shown in fig. 4, the apparatus further includes:
a determining unit 33, configured to determine whether the user charging frequency is smaller than a preset charging frequency threshold;
the determining unit 32 is configured to determine, when the user charging frequency is smaller than the preset charging frequency threshold, an SOC value corresponding to the range extender when the range extender is started under the condition that a preset driving condition is met according to the maximum SOC drop value, the minimum SOC value, and the driving frequency.
In some embodiments, as shown in fig. 4, the obtaining unit 31 includes:
a first obtaining module 311, configured to obtain a total amount of charge to the power battery in N travels and a total power consumption of power consuming components in the N travels; the N is a positive integer, and the power consumption parts comprise parts in a vehicle except the power battery and the range extender;
a first determining module 312, configured to determine a ratio of the total charging amount to the total power consumption as the user charging frequency.
In some embodiments, as shown in fig. 4, the obtaining unit 31 includes:
the second obtaining module 313 is used for obtaining the average consumed power interval with the highest frequency, the range extender power generation MAP, the target temperature and the heating time in the N driving processes; the N is a positive integer, the target temperature is the temperature of the power battery when the power generation power of the range extender is balanced with the power consumed by the vehicle, and the heating time is the heating time required by the power battery when the lowest temperature of the current area where the range extender is located reaches the target temperature;
a first calculating module 314, configured to calculate a power generation amount of the range extender according to the power generation power and the heating time of the range extender power generation MAP at each temperature point between the minimum temperature and the target temperature;
a second calculating module 315, configured to calculate a maximum actual electric quantity consumed according to the maximum consumed power and the heating time in the average consumed power interval;
a second determining module 316, configured to determine a maximum SOC decrease value caused by a driving expected under the starting of the range extender according to the power generation amount of the range extender and the maximum actual power consumption.
In some embodiments, the second obtaining module 313 is configured to determine the target temperature of the power battery when the range extender generated power is balanced with the vehicle consumed power according to the most frequent average consumed power interval, the most frequent average vehicle speed interval, the power battery charging MAP, and the range extender generated power MAP during N driving.
In some embodiments, the second obtaining module is configured to determine, according to a temperature difference value between the target temperature and the minimum temperature and a heating rate of the power battery, a heating time required for the power battery to reach the target temperature from the minimum temperature.
In some embodiments, the obtaining unit 31 is configured to obtain, when a first preset condition is met, a maximum decrease value of the state of charge SOC caused by one driving predicted at the start of the range extender, a minimum SOC value allowed when charging the power battery, and a driving number required by a user;
the first preset condition comprises at least one of the following:
and receiving a starting instruction for automatically adjusting the starting mode of the range extender, and determining that the highest temperature of the current day is less than a first preset temperature threshold.
In some embodiments, the determining unit 32 is configured to determine, when a second preset condition is met, a corresponding SOC value when the range extender is started as a default SOC value;
the second preset condition comprises at least one of the following:
and receiving a closing instruction for automatically adjusting the starting mode of the range extender, and determining that the lowest temperature of the day is greater than a second preset temperature threshold.
Compared with the SOC value corresponding to the starting of a fixed range extender in the prior art, the control device of the range extender provided by the embodiment of the disclosure can firstly acquire the maximum SOC drop value caused by one trip expected under the starting of the range extender, the minimum SOC value allowed when the power battery is charged and the running times required by a user, and then determine the SOC value corresponding to the starting of the range extender according to the maximum SOC drop value, the minimum SOC value and the running times, so that when the range extender is started based on the determined SOC value, the vehicle can run the running times without charging without increasing the charging frequency.
The control device of the range extender provided in the embodiment of the third aspect may be configured to execute the control method of the range extender provided in the embodiments of the first and second aspects, and the related meanings and specific implementations may refer to the related descriptions in the embodiments of the first and second aspects, and will not be described in detail here.
In a fourth aspect, another embodiment of the present disclosure further provides a storage medium, where the storage medium includes a stored program, and when the program runs, a device on which the storage medium is located is controlled to execute the control method of the range extender according to the first aspect or the second aspect.
In a fifth aspect, another embodiment of the present disclosure further provides a control device of a range extender, the device including a storage medium; and one or more processors, the storage medium coupled with the processors, the processors configured to execute program instructions stored in the storage medium; when the program instructions run, the control method of the range extender in the first aspect and the second aspect is executed.
In a sixth aspect, another embodiment of the disclosure also provides a vehicle comprising the apparatus of the fifth aspect.
As will be appreciated by one of skill in the art, embodiments of the present disclosure may be provided as a method, system, or computer program product. Accordingly, embodiments of the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present disclosure 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 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 disclosure. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams 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.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In a typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include forms of volatile memory in a computer readable medium, Random Access Memory (RAM) and/or non-volatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). The memory is an example of a computer-readable medium.
Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement 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 phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.
As will be appreciated by one of skill in the art, embodiments of the present disclosure may be provided as a method, system, or computer program product. Accordingly, embodiments of the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present disclosure 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 (13)
1. A method of controlling a range extender, the method comprising:
acquiring a maximum SOC (state of charge) reduction value caused by one-time driving predicted by starting a range extender, a minimum SOC value allowed when a power battery is charged and the driving times required by a user;
determining a corresponding SOC value when the range extender is started under the condition that a preset driving condition is met according to the SOC maximum descending value, the minimum SOC value and the driving times, wherein the preset driving condition is that a vehicle can drive at least the driving times under the condition of not charging;
before determining the corresponding SOC value when the range extender starts under the condition that the preset driving condition is met according to the SOC maximum descending value, the minimum SOC value and the driving times, the method further comprises the following steps:
acquiring user charging frequency;
judging whether the user charging frequency is smaller than a preset charging frequency threshold value or not;
and determining that the SOC value corresponding to the starting of the range extender comprises the following steps of:
when the user charging frequency is smaller than the preset charging frequency threshold value, determining a corresponding SOC value when the range extender is started under the condition of meeting preset driving conditions according to the SOC maximum descending value, the minimum SOC value and the driving times.
2. The method of claim 1, wherein the obtaining a user charging frequency comprises:
acquiring the total charge amount of the power battery in N times of driving and the total power consumption of power consumption parts in N times of driving; the N is a positive integer, and the power consumption parts comprise parts in a vehicle except the power battery and the range extender;
taking a ratio of the total charge amount to the total power consumption as the user charging frequency.
3. The method of claim 1, wherein obtaining a predicted maximum decrease in state of charge (SOC) for a trip at range extender start comprises:
acquiring an average power consumption interval with the highest frequency, the MAP (range extender) power generation, the target temperature and the heating time in the N driving processes; the N is a positive integer, the target temperature is the temperature of the power battery when the power generation power of the range extender is balanced with the power consumed by the vehicle, and the heating time is the heating time required by the power battery when the lowest temperature of the current area where the range extender is located reaches the target temperature;
calculating the generated energy of the range extender according to the generated power and the heating time of the MAP generated by the range extender at each temperature point between the lowest temperature and the target temperature;
calculating the maximum actual electric quantity consumed according to the maximum power consumption and the heating time in the average power consumption interval;
and determining the maximum SOC reduction value caused by one-time running predicted under the starting of the range extender according to the generated energy of the range extender and the maximum actual consumed electric quantity.
4. The method of claim 3, wherein obtaining the target temperature during the N travels comprises:
and determining the target temperature of the power battery when the power generated by the range extender is balanced with the power consumed by the vehicle according to the average power consumption interval with the highest frequency, the average vehicle speed interval with the highest frequency, the power battery charging MAP and the range extender power generation MAP in the N driving processes.
5. The method of claim 4, wherein obtaining the warm-up time during the N travels comprises:
and determining the heating time required by the power battery when the minimum temperature reaches the target temperature according to the temperature difference value between the target temperature and the minimum temperature and the heating rate of the power battery.
6. The method of any one of claims 1-5, wherein obtaining a maximum decrease in state of charge (SOC) value due to a trip expected at range extender start, a minimum SOC value allowed when charging a power battery, and a number of trips requested by a user comprises:
when a first preset condition is met, acquiring a maximum SOC reduction value caused by one-time driving predicted by starting a range extender, a minimum SOC value allowed when a power battery is charged and the driving times required by a user;
the first preset condition comprises at least one of the following:
and receiving a starting instruction for automatically adjusting the starting mode of the range extender, and determining that the highest temperature of the current day is less than a first preset temperature threshold.
7. The method of claim 6, further comprising:
when a second preset condition is met, determining the SOC value corresponding to the starting of the range extender as a default SOC value;
the second preset condition comprises at least one of the following:
and receiving a closing instruction for automatically adjusting the starting mode of the range extender, and determining that the lowest temperature of the day is greater than a second preset temperature threshold.
8. A control device of a range extender, characterized in that the device comprises:
the acquisition unit is used for acquiring a maximum SOC (state of charge) reduction value caused by one-time driving predicted under the starting of the range extender, a minimum SOC value allowed when the power battery is charged and the driving times required by a user;
a determining unit, configured to determine, according to the maximum SOC drop value, the minimum SOC value, and the number of driving times, an SOC value corresponding to when the range extender is started when a preset driving condition is satisfied, where the preset driving condition is that the vehicle can be driven at least the number of driving times without being charged;
the acquiring unit is further configured to acquire a user charging frequency before determining a corresponding SOC value when the range extender is started under a condition that a preset driving condition is met according to the maximum SOC drop value, the minimum SOC value and the driving frequency;
the device further comprises:
the judging unit is used for judging whether the user charging frequency is smaller than a preset charging frequency threshold value or not;
the determining unit is used for determining a corresponding SOC value when the range extender is started under the condition that a preset running condition is met when the user charging frequency is smaller than the preset charging frequency threshold value, wherein the preset running condition is that the vehicle can run at least the running times without charging.
9. The apparatus of claim 8, wherein the obtaining unit comprises:
the second acquisition module is used for acquiring the average consumed power interval with the highest frequency, the range extender power generation MAP, the target temperature and the heating time in the N driving processes; the N is a positive integer, the target temperature is the temperature of the power battery when the power generation power of the range extender is balanced with the power consumed by the vehicle, and the heating time is the heating time required by the power battery when the lowest temperature of the current area where the range extender is located reaches the target temperature;
the first calculation module is used for calculating the power generation amount of the range extender according to the power generation power and the heating time of the MAP at each temperature point between the lowest temperature and the target temperature;
the second calculation module is used for calculating the maximum actual electric quantity consumed according to the maximum power consumption and the heating time in the average power consumption interval;
and the second determination module is used for determining the maximum SOC reduction value caused by one-time driving predicted under the starting of the range extender according to the power generation amount of the range extender and the maximum actual power consumption.
10. The apparatus according to any one of claims 8 to 9, wherein the acquiring unit is configured to acquire a maximum decrease value of the SOC caused by one trip expected at the start of the range extender, a minimum SOC value allowed when charging the power battery, and a number of trips required by a user, when a first preset condition is satisfied;
the first preset condition comprises at least one of the following:
and receiving a starting instruction for automatically adjusting the starting mode of the range extender, and determining that the highest temperature of the day is smaller than a first preset temperature threshold.
11. A storage medium, characterized in that the storage medium includes a stored program, wherein when the program is executed, a device in which the storage medium is located is controlled to execute the control method of the range extender of any one of claims 1 to 7.
12. A control device of a range extender, characterized in that the device comprises a storage medium; and one or more processors, the storage medium coupled with the processors, the processors configured to execute program instructions stored in the storage medium; the program instructions when executed perform the control method of the range extender of any one of claims 1 to 7.
13. A vehicle characterized in that it comprises the device of claim 12.
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