CN109808675B - Electric quantity control method and device for hybrid electric vehicle and vehicle control unit - Google Patents
Electric quantity control method and device for hybrid electric vehicle and vehicle control unit Download PDFInfo
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Abstract
The invention provides a method and a device for controlling electric quantity of a hybrid electric vehicle and a vehicle controller, wherein the control method is applied to the vehicle controller and comprises the following steps: receiving an electric quantity control instruction carrying a target subsection pure electric mileage value; judging whether the target segmented pure electric mileage value is a null value; if so, determining the optimal value of the efficiency of the current power system, and controlling the electric quantity of the power battery according to the optimal value of the efficiency of the current power system; if not, determining a target power battery electric quantity value according to the target segmented pure electric mileage value, and controlling the electric quantity of the power battery according to the target power battery electric quantity value. Based on the method disclosed by the invention, after the driver segments the driving task, the segmented pure electric mileage can be converted into the required electric quantity, so that the segmented adjustment or continuous adjustment of the pure electric mileage of the whole driving task is realized, the estimation accuracy of the pure electric mileage is improved, the electric energy loss is reduced, and the energy consumption is reduced.
Description
Technical Field
The invention relates to the technical field of hybrid electric vehicles, in particular to a method and a device for controlling electric quantity of a hybrid electric vehicle and a vehicle control unit.
Background
At present, the electric quantity management modes of the hybrid electric vehicle mainly include three modes, namely a "forced charging mode", an "electric quantity keeping mode" and an "intelligent mode/Auto mode", wherein the "forced charging mode" refers to increasing the current electric quantity of the power battery to a target value through continuous charging, the "electric quantity keeping mode" refers to maintaining the current electric quantity of the power battery through continuous charging, and the "intelligent mode/Auto mode" controls the electric quantity of the power battery according to the optimal efficiency of the power system of the whole vehicle, namely the highest power generation efficiency of an engine.
The driver can only select the electric quantity management mode according to the current electric quantity of the power battery displayed on the instrument, so that the pure electric mileage of the whole driving task is estimated before the driver selects the electric quantity management mode, and once the estimation is inaccurate, electric energy loss is easily caused, and the oil consumption is increased.
Disclosure of Invention
In view of the above, the invention provides a method and a device for controlling electric quantity of a hybrid electric vehicle and a vehicle controller, so as to solve the problem that electric energy loss is easily caused due to inaccurate estimation of pure electric mileage of a whole driving task by a driver. The technical scheme is as follows:
a method for controlling electric quantity of a hybrid electric vehicle is applied to a vehicle control unit and comprises the following steps:
receiving an electric quantity control instruction carrying a target subsection pure electric mileage value;
judging whether the target segmented pure electric mileage value is a null value;
if so, determining the optimal value of the efficiency of the power system of the current finished automobile, and controlling the electric quantity of the power battery according to the optimal value of the efficiency of the power system of the current finished automobile;
if not, determining a target power battery electric quantity value according to the target segmented pure electric mileage value, and controlling the electric quantity of the power battery according to the target power battery electric quantity value.
Preferably, the method further comprises the following steps:
and sending the target segmented pure electric mileage value to a meter for display.
Preferably, the determining the target power battery electric quantity value according to the target segmented pure electric mileage value includes:
determining a target power battery electric quantity value corresponding to a target subsection pure electric mileage value according to a preset mapping relation between the target subsection pure electric mileage and the target power battery electric quantity;
the power battery is subjected to power control according to the target power battery power value, and the method comprises the following steps:
determining a target power battery electric quantity allowable range according to the target power battery electric quantity value and a preset electric quantity allowable error range;
acquiring the current electric quantity value of a power battery in real time, and judging whether the current electric quantity value of the power battery is within the electric quantity allowable range of the target power battery;
and if not, charging the power battery according to the allowable range of the target power battery electric quantity, and returning to execute the step of collecting the current electric quantity value of the power battery in real time.
A hybrid vehicle electric quantity control device includes: the device comprises a receiving module, a judging module, a first power control module and a second power control module;
the receiving module is used for receiving an electric quantity control instruction carrying a target subsection pure electric mileage value;
the judging module is used for judging whether the target subsection pure electric mileage value is a null value; if yes, triggering the first power control module; if not, triggering the second power control module;
the first electric quantity control module is used for determining the optimal value of the efficiency of the power system of the whole vehicle at present and controlling the electric quantity of the power battery according to the optimal value of the efficiency of the power system of the whole vehicle at present;
and the second power control module is used for determining a target power battery power value according to the target segmented pure electric mileage value and controlling the power of the power battery according to the target power battery power value.
Preferably, the method further comprises the following steps: a sending module;
and the transmitting module is used for transmitting the target segmented pure electric mileage value to a meter for displaying.
Preferably, the second power control module, configured to determine the target power battery power value according to the target segment pure electric mileage value, is specifically configured to:
determining a target power battery electric quantity value corresponding to a target subsection pure electric mileage value according to a preset mapping relation between the target subsection pure electric mileage and the target power battery electric quantity;
the second power control module is used for controlling the power of the power battery according to the target power battery power value, and is specifically used for:
determining a target power battery electric quantity allowable range according to the target power battery electric quantity value and a preset electric quantity allowable error range;
acquiring the current electric quantity value of a power battery in real time, and judging whether the current electric quantity value of the power battery is within the electric quantity allowable range of the target power battery;
and if not, charging the power battery according to the allowable range of the target power battery electric quantity, and returning to execute the step of collecting the current electric quantity value of the power battery in real time.
A vehicle control unit, comprising: a processor and a memory;
the memory is used for storing an operating program, codes or instructions of the electric quantity control method of the hybrid electric vehicle;
the processor is used for operating the operation programs, codes or instructions stored in the memory when the electric quantity control of the hybrid electric vehicle is carried out, wherein the programs, the codes or the instructions are used for:
receiving an electric quantity control instruction carrying a target subsection pure electric mileage value;
judging whether the target segmented pure electric mileage value is a null value;
if so, determining the optimal value of the efficiency of the power system of the current finished automobile, and controlling the electric quantity of the power battery according to the optimal value of the efficiency of the power system of the current finished automobile;
if not, determining a target power battery electric quantity value according to the target segmented pure electric mileage value, and controlling the electric quantity of the power battery according to the target power battery electric quantity value.
Compared with the prior art, the invention has the following beneficial effects:
the method, the device and the vehicle control unit are applied to the vehicle control unit, and can analyze the carried target segmented pure electric mileage value when receiving the electric quantity control instruction; if the current power battery is a null value, namely, the driver does not determine the pure electric mileage value of the current control, the electric quantity of the power battery is controlled according to the optimal efficiency of the whole vehicle; if the current power battery electric quantity value is not a null value, namely, the driver determines the pure electric mileage value of the current control, the target power battery electric quantity value corresponding to the target subsection pure electric mileage value is determined, and then the electric quantity control is carried out on the power battery according to the target power battery electric quantity value.
Based on the method disclosed by the invention, after the driver segments the driving task, the segmented pure electric mileage can be converted into the required electric quantity, so that the segmented adjustment or continuous adjustment of the pure electric mileage of the whole driving task is realized, the estimation accuracy of the pure electric mileage is improved, the electric energy loss is reduced, and the energy consumption is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a flowchart illustrating a method for controlling electric quantity of a hybrid electric vehicle according to an embodiment of the present invention;
FIG. 2 is a flowchart of a portion of a method for controlling electric quantity of a hybrid electric vehicle according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a hybrid electric vehicle power control apparatus according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a hybrid electric vehicle power control apparatus according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of the vehicle control unit according to the embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention provides a method for controlling electric quantity of a hybrid electric vehicle, which is applied to a vehicle control unit, wherein the flow chart of the method is shown in figure 1, and the method comprises the following steps:
s10, receiving an electric quantity control instruction carrying a target segmented pure electric mileage value;
in the process of executing step S10, the driver may set the full electric range by operating the segment, for example, the entire driving task is divided into four segments of 5 segments, 20km, 30km, 40km, and a null value, where the "null value" means that the driver does not determine the full electric range value of the current power control, and the three target segmented full electric range values of "20 km", "30 km", and "40 km" are not "null value" because they are determined values.
S20, judging whether the target segmented pure electric mileage value is a null value; if yes, go to step S30; if not, go to step S40;
s30, determining the optimal value of the efficiency of the power system of the whole vehicle at present, and controlling the electric quantity of the power battery according to the optimal value of the efficiency of the power system of the whole vehicle at present;
in the process of executing step S30, the efficiency of the entire vehicle power system refers to the comprehensive efficiency of the engine power generation, and the optimal value of the current efficiency of the entire vehicle power system is the highest value of the current engine power generation efficiency, and the power battery is charged with the highest value of the current engine power generation efficiency, that is, the "intelligent charging" mode is started.
S40, determining a target power battery electric quantity value according to the target segmented pure electric mileage value, and controlling the electric quantity of the power battery according to the target power battery electric quantity value;
in the process of executing the step S40, since the pure electric mileage is directly related to the electric quantity of the power battery, the essence of setting the segmented pure electric mileage is to set the electric quantity of the power battery, and therefore, the target electric quantity value corresponding to the target segmented pure electric mileage value can be determined through the preset mapping relationship between the target segmented pure electric mileage and the target electric quantity of the power battery, and then the electric quantity of the power battery is controlled according to the target electric quantity value, and when the current electric quantity of the power battery is lower than the target electric quantity value of the power battery, the engine is started to charge the power battery until the target electric quantity value of the power battery is reached and maintained.
In the specific implementation process, in the step S40, the process of "performing power control on the power battery according to the target power battery power value" may specifically adopt the following steps, and a flowchart of the method is shown in fig. 2:
s401, determining a target power battery electric quantity allowable range according to the target power battery electric quantity value and a preset electric quantity allowable error range;
in the process of executing step S401, the preset electric quantity allowable error range is: when the maximum value of the preset electric quantity allowable error is zero, the maximum value of the target power battery electric quantity allowable error can be calculated according to the following formula (1):
A＝a+b (1)
wherein A is the maximum allowable value of the electric quantity of the target power battery, a is the electric quantity value of the target power battery, and b is the maximum allowable error value of the preset electric quantity;
the allowable range of the target dynamic battery electric quantity is as follows: the target power battery electric quantity value reaches the target power battery electric quantity allowable maximum value.
S402, acquiring the current electric quantity value of the power battery in real time, and judging whether the current electric quantity value of the power battery is within the electric quantity allowable range of the target power battery; if not, go to step S403;
s403, charging the power battery according to the electric quantity allowable range of the target power battery, and returning to execute the step S402;
it should be noted that, if the current electric quantity value of the power battery is within the allowable range of the electric quantity of the target power battery, the power battery is not charged, and the step S402 is continuously executed;
the above steps S401 to S403 are only a preferred implementation manner of the "power control of the power battery according to the target power battery power value" process in step S40 disclosed in this embodiment of the present application, and the specific implementation manner of this process may be arbitrarily set according to its own requirements, and is not limited herein.
It should be further noted that the method for controlling electric quantity of a hybrid electric vehicle provided by the embodiment of the invention is convenient for a driver to view the selected target segment pure electric mileage, and can also send the target segment pure electric mileage value to the meter for displaying.
According to the electric quantity control method for the hybrid electric vehicle, provided by the embodiment of the invention, after a driver segments a driving task, the segmented pure electric mileage can be converted into the required electric quantity, so that the pure electric mileage of the whole driving task can be segmentally or continuously adjusted, the estimation accuracy of the pure electric mileage is improved, the electric energy loss is reduced, and the energy consumption is reduced.
Based on the method for controlling electric quantity of a hybrid electric vehicle provided in the foregoing embodiment, an embodiment of the present invention correspondingly provides an apparatus for executing the method for controlling electric quantity of a hybrid electric vehicle, and a schematic structural diagram of the apparatus is shown in fig. 3, where the apparatus includes: the power supply control system comprises a receiving module 10, a judging module 20, a first power control module 30 and a second power control module 40;
the receiving module 10 is used for receiving an electric quantity control instruction carrying a target segmented pure electric mileage value;
the judging module 20 is used for judging whether the target segmented pure electric mileage value is a null value; if yes, triggering the first charging determining module 30; if not, triggering a second determining and charging module 40;
the first electric quantity control module 30 is used for determining the optimal value of the efficiency of the power system of the whole vehicle at present and controlling the electric quantity of the power battery according to the optimal value of the efficiency of the power system of the whole vehicle at present;
and the second electric quantity control module 40 is used for determining a target power battery electric quantity value according to the target segmented pure electric mileage value and controlling the electric quantity of the power battery according to the target power battery electric quantity value.
The electric quantity control device of the hybrid electric vehicle shown in fig. 4 further includes: a sending module 50;
and the sending module 50 is used for sending the target segmented pure electric mileage value to the instrument for displaying.
Optionally, the second power control module 40 is configured to determine a target power battery power value according to the target segmented pure electric mileage value, and specifically configured to:
determining a target power battery electric quantity value corresponding to the target segmented pure electric mileage value according to a preset mapping relation between the target segmented pure electric mileage and the target power battery electric quantity;
the second power control module 40 is configured to charge the power battery according to the target power battery power value, and is specifically configured to:
determining a target power battery electric quantity allowable range according to the target power battery electric quantity value and a preset electric quantity allowable error range;
acquiring the current electric quantity value of the power battery in real time, and judging whether the current electric quantity value of the power battery is within the electric quantity allowable range of the target power battery;
and if not, charging the power battery according to the electric quantity allowable range of the target power battery, and returning to execute the step of collecting the current electric quantity value of the power battery in real time.
The electric quantity control device of the hybrid electric vehicle provided by the embodiment of the invention can realize that the pure electric mileage of the whole driving task can be adjusted in a segmented or continuous mode, improve the estimation accuracy of the pure electric mileage and reduce the electric energy loss, thereby reducing the energy consumption.
Based on the hybrid electric vehicle electric quantity control method and the hybrid electric vehicle electric quantity control device provided by the above embodiments, an embodiment of the present invention further provides a vehicle control unit, a schematic structural diagram of which is shown in fig. 5, and the vehicle control unit includes: a processor 60 and a memory 70;
a memory 60 for storing an operating program, code or instructions of the hybrid vehicle electric quantity control method;
a processor 70 for executing the operating program, code or instructions stored in the memory 60 when performing hybrid vehicle charge control, wherein the program, code or instructions are for:
receiving an electric quantity control instruction carrying a target subsection pure electric mileage value;
judging whether the target segmented pure electric mileage value is a null value;
if so, determining the optimal value of the efficiency of the power system of the current finished automobile, and controlling the electric quantity of the power battery according to the optimal value of the efficiency of the power system of the current finished automobile;
if not, determining a target power battery electric quantity value according to the target segmented pure electric mileage value, and controlling the electric quantity of the power battery according to the target power battery electric quantity value.
When the processor 70 is to perform the operations related to the hybrid electric vehicle power control method disclosed in the embodiment of the present application, the process of the hybrid electric vehicle power control method disclosed in the embodiment of the present application can be completed by calling and executing the operation program, code or instructions stored in the memory 60. For a specific process, reference may be made to corresponding portions in the foregoing embodiments of the present application, which are not described herein again.
The vehicle control unit provided by the embodiment of the invention can realize segmented adjustment or continuous adjustment of the pure electric mileage of the whole driving task, improve the estimation accuracy of the pure electric mileage and reduce the electric energy loss, thereby reducing the energy consumption.
The method, the device and the vehicle control unit for controlling the electric quantity of the hybrid electric vehicle provided by the invention are described in detail, a specific example is applied in the description to explain the principle and the implementation mode of the invention, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
It should be noted that, in the present specification, the embodiments are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, 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 or 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 a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (5)
1. A method for controlling electric quantity of a hybrid electric vehicle is characterized by being applied to a vehicle control unit and comprising the following steps:
receiving an electric quantity control instruction carrying a target subsection pure electric mileage value;
judging whether the target segmented pure electric mileage value is a null value;
if so, determining the optimal value of the efficiency of the power system of the current finished automobile, and controlling the electric quantity of the power battery according to the optimal value of the efficiency of the power system of the current finished automobile;
if not, determining a target power battery electric quantity value according to the target segmented pure electric mileage value, and controlling the electric quantity of the power battery according to the target power battery electric quantity value;
wherein, the determining the target power battery electric quantity value according to the target segmented pure electric mileage value comprises the following steps:
determining a target power battery electric quantity value corresponding to a target subsection pure electric mileage value according to a preset mapping relation between the target subsection pure electric mileage and the target power battery electric quantity;
the power battery is subjected to power control according to the target power battery power value, and the method comprises the following steps:
determining a target power battery electric quantity allowable range according to the target power battery electric quantity value and a preset electric quantity allowable error range;
acquiring the current electric quantity value of a power battery in real time, and judging whether the current electric quantity value of the power battery is within the electric quantity allowable range of the target power battery;
and if not, charging the power battery according to the allowable range of the target power battery electric quantity, and returning to execute the step of collecting the current electric quantity value of the power battery in real time.
2. The method of claim 1, further comprising:
and sending the target segmented pure electric mileage value to a meter for display.
3. A hybrid electric vehicle electric quantity control device is characterized by comprising: the device comprises a receiving module, a judging module, a first power control module and a second power control module;
the receiving module is used for receiving an electric quantity control instruction carrying a target subsection pure electric mileage value;
the judging module is used for judging whether the target subsection pure electric mileage value is a null value; if yes, triggering the first power control module; if not, triggering the second power control module;
the first electric quantity control module is used for determining the optimal value of the efficiency of the power system of the whole vehicle at present and controlling the electric quantity of the power battery according to the optimal value of the efficiency of the power system of the whole vehicle at present;
the second power control module is used for determining a target power battery power value according to the target segmented pure electric mileage value and controlling the power of the power battery according to the target power battery power value;
the second power control module for determining the target power battery power value according to the target segmented pure electric mileage value is specifically configured to:
determining a target power battery electric quantity value corresponding to a target subsection pure electric mileage value according to a preset mapping relation between the target subsection pure electric mileage and the target power battery electric quantity;
the second power control module is used for controlling the power of the power battery according to the target power battery power value, and is specifically used for:
determining a target power battery electric quantity allowable range according to the target power battery electric quantity value and a preset electric quantity allowable error range;
acquiring the current electric quantity value of a power battery in real time, and judging whether the current electric quantity value of the power battery is within the electric quantity allowable range of the target power battery;
and if not, charging the power battery according to the allowable range of the target power battery electric quantity, and returning to execute the step of collecting the current electric quantity value of the power battery in real time.
4. The apparatus of claim 3, further comprising: a sending module;
and the transmitting module is used for transmitting the target segmented pure electric mileage value to a meter for displaying.
5. A vehicle control unit, comprising: a processor and a memory;
the memory is used for storing an operating program, codes or instructions of the electric quantity control method of the hybrid electric vehicle;
the processor is used for operating the operation programs, codes or instructions stored in the memory when the electric quantity control of the hybrid electric vehicle is carried out, wherein the programs, the codes or the instructions are used for:
receiving an electric quantity control instruction carrying a target subsection pure electric mileage value;
judging whether the target segmented pure electric mileage value is a null value;
if so, determining the optimal value of the efficiency of the power system of the current finished automobile, and controlling the electric quantity of the power battery according to the optimal value of the efficiency of the power system of the current finished automobile;
if not, determining a target power battery electric quantity value according to the target segmented pure electric mileage value, and controlling the electric quantity of the power battery according to the target power battery electric quantity value;
wherein, the determining the target power battery electric quantity value according to the target segmented pure electric mileage value comprises the following steps:
determining a target power battery electric quantity value corresponding to a target subsection pure electric mileage value according to a preset mapping relation between the target subsection pure electric mileage and the target power battery electric quantity;
the power battery is subjected to power control according to the target power battery power value, and the method comprises the following steps:
determining a target power battery electric quantity allowable range according to the target power battery electric quantity value and a preset electric quantity allowable error range;
acquiring the current electric quantity value of a power battery in real time, and judging whether the current electric quantity value of the power battery is within the electric quantity allowable range of the target power battery;
and if not, charging the power battery according to the allowable range of the target power battery electric quantity, and returning to execute the step of collecting the current electric quantity value of the power battery in real time.
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| CN102303541B (en) * | 2011-06-20 | 2013-01-09 | 安徽安凯汽车股份有限公司 | Management method for electric quantity of storage battery for extended range type electric automobile |
| CN103707878B (en) * | 2013-05-10 | 2017-02-08 | 上海埃士工业科技有限公司 | Route planning based hybrid control method and system |
| CN106143475B (en) * | 2015-03-25 | 2019-01-11 | 比亚迪股份有限公司 | Hybrid vehicle and its drive control method and apparatus |
| CN105128853A (en) * | 2015-09-02 | 2015-12-09 | 华晨汽车集团控股有限公司 | System used for calculating driving mileage of extended-range hybrid power automobile |
| CN106476643A (en) * | 2016-10-25 | 2017-03-08 | 湖南大学 | A kind of electricity Trajectory Planning System of stroke-increasing electric automobile and control method |
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