CN109808674B - Hybrid electric vehicle control method and device, vehicle control unit and vehicle - Google Patents
Hybrid electric vehicle control method and device, vehicle control unit and vehicle Download PDFInfo
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- CN109808674B CN109808674B CN201711137084.3A CN201711137084A CN109808674B CN 109808674 B CN109808674 B CN 109808674B CN 201711137084 A CN201711137084 A CN 201711137084A CN 109808674 B CN109808674 B CN 109808674B
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Abstract
The invention provides a hybrid electric vehicle control method and device, a vehicle control unit and a vehicle. The control method comprises the following steps: dividing the residual electric quantity into a plurality of residual electric quantity intervals, wherein each residual electric quantity interval corresponds to a control strategy; acquiring an energy consumption input parameter, and taking the energy consumption input parameter as a coefficient for adjusting the boundary range of the electric quantity interval; and acquiring the current residual capacity of the battery, judging the residual capacity interval in which the current residual capacity is positioned, and performing charge and discharge control on the battery according to a control strategy corresponding to the residual capacity interval. According to the control method, different residual capacity intervals are set in a detailed mode, and the boundaries of the residual capacity intervals are set according to the characteristics of the battery, so that the performance and energy management improvement space of the complex series-parallel hybrid power system is pursued to the utmost extent. And (4) combining the power consumption of the high-voltage battery, dynamically weighting and adjusting the boundary value of the residual power interval in a mode of predicting the power consumption of the component and the fault of the high-voltage battery, and using the use requirement of the congested road condition better.
Description
Technical Field
The invention relates to the field of automobile manufacturing, in particular to a hybrid electric vehicle control method and device, a vehicle control unit and an automobile.
Background
As a development trend of future automobiles, the cruising ability and fuel economy of a hybrid electric vehicle have been paid more and more attention by various manufacturers, and become important to research.
In the prior art. The state of charge of a battery of the hybrid electric vehicle is set and divided into a plurality of zones, and different charging and discharging strategies, namely different driving strategies, are executed in each zone.
However, the processing method is relatively extensive, the SOC is finely partitioned without combining road conditions, the engine is started to charge in advance under the condition of careful congestion, and the working states of the two motors are divided into work in combination with a hybrid system structure. Meanwhile, each subarea is in a fixed range, and subarea change cannot be carried out according to different road conditions, so that the method is better suitable for the current road conditions.
Disclosure of Invention
The invention provides a hybrid electric vehicle control method, a hybrid electric vehicle control device, a vehicle control unit and a vehicle, aiming at overcoming the technical problem that battery partition management cannot be carried out by distinguishing road conditions due to the fact that battery partition management of a hybrid electric vehicle is in a fixed electric quantity interval range in the prior art.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention provides a control method of a hybrid electric vehicle, which comprises the following steps:
dividing the residual electric quantity into a plurality of residual electric quantity intervals, wherein each residual electric quantity interval corresponds to a control strategy;
acquiring an energy consumption input parameter, and taking the energy consumption input parameter as a coefficient for adjusting the boundary range of the electric quantity interval;
and acquiring the current residual capacity of the battery, judging the residual capacity interval in which the current residual capacity is positioned, and performing charge and discharge control on the battery according to a control strategy corresponding to the residual capacity interval.
Further, in the control method of the hybrid vehicle, the dividing into a plurality of remaining power ranges includes:
the plurality of remaining power intervals include:
a first interval, a second interval, a third interval, a fourth interval and a fifth interval;
and the electric quantity from the first interval, the second interval, the third interval, the fourth interval to the fifth interval is decreased in sequence.
Further, in the control method of the hybrid electric vehicle, the step of obtaining the current remaining power of the battery, determining the remaining power interval in which the current remaining power is located, and controlling charging and discharging of the battery according to the control strategy corresponding to the remaining power interval includes:
the current residual electric quantity of the battery is between the upper limit of the threshold value and the full state, the generator is controlled to stop generating electricity and the driving motor is controlled to brake, recover and charge, and the battery is prevented from being overcharged;
the current residual electric quantity of the battery is between a lower limit of a threshold value and an empty state, the battery is controlled to stop outputting power outwards, the over-discharge of the battery is avoided, and the generator is controlled to generate power with first power, wherein the first power is equal to the sum of the maximum powers of all electric appliances of the whole vehicle;
the current residual electric quantity of the battery is within a first interval, and the driving motor is controlled to consume the electric energy of the battery;
the current residual electric quantity of the battery is in a second interval, the engine is controlled to work in an economic interval, the engine is controlled to supply redundant torque to the generator to generate electricity, and the electric quantity of the battery is kept;
the current residual capacity of the battery is in a third interval, and the engine is controlled to keep running when a torque demand exists;
the current residual electric quantity of the battery is positioned in a fourth interval, the engine is controlled to drive the generator to charge with the maximum allowable power, and the torque requirement of the large throttle motor is limited;
and when the current residual capacity of the battery is in a fifth interval, reducing the output power of the driving motor to a second power, wherein the second power is equal to the sum of the engine power and the battery discharge power, and subtracting the power left by the sum of other power utilization components.
Further, in the control method of the hybrid electric vehicle, the step of obtaining the energy consumption input parameter and using the energy consumption input parameter as a coefficient for adjusting the boundary range of the electric quantity interval includes:
and accumulating and integrating the power consumption of the power consumption part and the output electric quantity of the battery to obtain the energy consumption input parameter.
Further, in the control method of the hybrid electric vehicle, the step of obtaining the current remaining power of the battery, determining the remaining power interval in which the current remaining power is located, and controlling charging and discharging of the battery according to the control strategy corresponding to the remaining power interval includes:
and setting a first calibration value in the residual electric quantity interval, and sequentially closing the electric devices according to the priority levels of the electric components when the current residual electric quantity of the battery is lower than the first calibration value.
The invention provides a hybrid vehicle control device, comprising:
the dividing module is used for dividing the residual electric quantity into a plurality of residual electric quantity intervals, and each residual electric quantity interval corresponds to a control strategy;
the adjusting module is used for acquiring an energy consumption input parameter and taking the energy consumption input parameter as a coefficient for adjusting the boundary range of the electric quantity interval;
and the processing module is used for acquiring the current residual electric quantity of the battery, judging the residual electric quantity interval in which the current residual electric quantity is positioned, and controlling charging and discharging of the battery according to a control strategy corresponding to the residual electric quantity interval.
Further, in the hybrid vehicle control device, the plurality of remaining power sections include:
a first interval, a second interval, a third interval, a fourth interval and a fifth interval;
and the electric quantity from the first interval, the second interval, the third interval, the fourth interval to the fifth interval is decreased in sequence.
Further, in the control device of the hybrid vehicle, the processing module is specifically configured to:
the current residual electric quantity of the battery is between the upper limit of the threshold value and the full state, the generator is controlled to stop generating electricity and the driving motor is controlled to brake, recover and charge, and the battery is prevented from being overcharged;
the current residual electric quantity of the battery is between a lower limit of a threshold value and an empty state, the battery is controlled to stop outputting power outwards, the over-discharge of the battery is avoided, and the generator is controlled to generate power with first power, wherein the first power is equal to the sum of the maximum powers of all electric appliances of the whole vehicle;
the current residual electric quantity of the battery is within a first interval, and the driving motor is controlled to consume the electric energy of the battery;
the current residual electric quantity of the battery is in a second interval, the engine is controlled to work in an economic interval, the engine is controlled to supply redundant torque to the generator to generate electricity, and the electric quantity of the battery is kept;
the current residual capacity of the battery is in a third interval, and the engine is controlled to keep running when a torque demand exists;
the current residual electric quantity of the battery is positioned in a fourth interval, the engine is controlled to drive the generator to charge with the maximum allowable power, and the torque requirement of the large throttle motor is limited;
and when the current residual capacity of the battery is in a fifth interval, reducing the output power of the driving motor to a second power, wherein the second power is equal to the sum of the engine power and the battery discharge power, and subtracting the power left by the sum of other power utilization components.
Further, in the control device of the hybrid vehicle, the adjusting module is specifically configured to:
and accumulating and integrating the power consumption of the power consumption part and the output electric quantity of the battery to obtain the energy consumption input parameter.
Further, in the control device of a hybrid vehicle, the processing module is further configured to:
and setting a first calibration value in the residual electric quantity interval, and sequentially closing the electric devices according to the priority levels of the electric components when the current residual electric quantity of the battery is lower than the first calibration value.
The invention also provides a vehicle control unit which comprises the hybrid electric vehicle control device.
The invention also provides an automobile comprising the vehicle control unit.
The invention has the beneficial effects that: according to the control method, different residual capacity intervals are set in a detailed mode, and the boundaries of the residual capacity intervals are set according to the characteristics of the battery, so that the performance and energy management improvement space of the complex series-parallel hybrid power system is pursued to the utmost extent. And (4) combining the power consumption of the high-voltage battery, dynamically weighting and adjusting the boundary value of the residual power interval in a mode of predicting the power consumption of the component and the fault of the high-voltage battery, and using the use requirement of the congested road condition better.
Drawings
FIG. 1 is a flow chart illustrating a control method of a hybrid vehicle according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the system connection of the hybrid vehicle according to the embodiment of the invention;
FIG. 3 is a schematic diagram illustrating the division of the remaining power range in the control method of the hybrid vehicle according to the embodiment of the invention;
FIG. 4 is a schematic diagram illustrating a division of a remaining power interval in the control method of the hybrid vehicle according to the embodiment of the invention;
fig. 5 is a schematic view showing a principle of the zonal control in the hybrid vehicle control method according to the embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1, the present invention provides a control method of a hybrid vehicle, including: step 1, dividing the power into a plurality of remaining power intervals; step 2, acquiring an energy consumption input parameter, and using the energy consumption input parameter as a coefficient for adjusting the boundary range of the electric quantity interval; and 3, acquiring the current residual capacity of the battery, judging the residual capacity interval where the current residual capacity is positioned, and controlling charging and discharging of the battery according to a control strategy corresponding to the residual capacity interval.
Specifically, in the control method, in step 1, the vehicle control unit ECU divides the remaining electric quantity into a plurality of remaining electric quantity intervals, and the control strategies corresponding to each remaining electric quantity interval are different, so as to ensure that the hybrid electric vehicle is optimally controlled when the remaining electric quantity of the hybrid electric vehicle is in different remaining electric quantity intervals. And step 2 is the core of the control method, namely, the coefficient of the boundary range of the electric quantity interval is adjusted according to the energy consumption input parameter, and the boundary of the electric quantity interval is dynamically adjusted according to the real-time energy consumption of the hybrid electric vehicle, so that the residual electric quantity falls into a reasonable residual electric quantity interval, and the power consumption of the hybrid electric vehicle is ensured to be at an optimal level. And 3, judging the residual electric quantity interval of the adjustment boundary where the current residual electric quantity is positioned, and controlling the charge and discharge energy according to a control strategy corresponding to the residual electric quantity interval. According to the control method, different residual capacity intervals are set in a detailed mode, and the boundaries of the residual capacity intervals are set according to the characteristics of the battery, so that the performance and energy management improvement space of the complex series-parallel hybrid power system is pursued to the utmost extent. And (4) combining the power consumption of the high-voltage battery, dynamically weighting and adjusting the boundary value of the residual power interval in a mode of predicting the power consumption of the component and the fault of the high-voltage battery, and using the use requirement of the congested road condition better.
Referring to fig. 2, the energy source for the high voltage battery has three inputs: the external charging, the engine charges through the generator, and the driving motor is braked and recycled. And (3) discharging the high-voltage battery: drive motor, air conditioner, PTC, DCDC converter, loss of high voltage wiring harness, etc.
Generally, the residual capacity of the high-voltage battery should not be lower than the region between SOC2 and SOC1, when the bottom line of the battery over-discharge is imminent.
The power system of the hybrid electric vehicle consists of an engine, a generator, a driving motor and a clutch, wherein the engine can charge the high-voltage battery through the generator, and the engine can be used for driving the vehicle after the clutch is combined; the driving motor drives the vehicle to run, and meanwhile, energy recovery charging is carried out on the high-voltage battery during braking or sliding. Because the whole structure has no special transmission, the engine cannot participate in driving when the vehicle speed is low, but the generator can be driven to generate power by separating the clutch.
From pure internal combustion engines, to series-parallel hybrid, the complexity of the system increases gradually. The interaction between the engine and a high-voltage system and between the high-voltage battery and the low-voltage battery is more and more. Energy management is carried out through high-voltage partition and subdivision working conditions, and a plurality of improvement spaces which are neglected before in the hybrid system are pursued to be extremely consistent.
Referring to fig. 3, further, the plurality of remaining power intervals include:
a first interval (between SOC 4-SOCx), a second interval (between SOC3-SOC 4), a third interval (between SOC2-SOC 3), a fourth interval (between SOC1-SOC 2), and a fifth interval (between SOCy-SOC 1);
and the electric quantity from the first interval, the second interval, the third interval, the fourth interval to the fifth interval is decreased in sequence. Therefore, the remaining power can fall into different remaining power intervals according to the remaining power.
Referring to fig. 5, specifically, the current remaining capacity of the battery is between the upper threshold and the full state (i.e. the remaining capacity is greater than SOCx), the generator is controlled to stop generating power, and the driving motor is controlled to brake and recover charging. When the residual electric quantity SOCx of the high-voltage battery is between 100 percent and 100 percent, the residual electric quantity is very high, the engine is not allowed to be charged through the generator, or the driving motor is braked and recycled, the risk of overcharging is avoided, because under the condition of road congestion, a plurality of small emergency braking working conditions exist during the running of the vehicle, and the instantaneous recycling current is larger at the moment.
The current residual capacity of the battery is between a lower threshold and a no-load state (namely the residual capacity is less than SOCy), the battery is controlled to stop outputting power outwards, and the generator is controlled to generate power with first power, wherein the first power is equal to the sum of the maximum powers of all electric appliances of the whole vehicle. If the electric quantity of the high-voltage battery is reduced to be below SOCy, the output power of the high-voltage battery is forbidden, over-discharge is avoided, the maximum power which can be used by all electric appliances (including a driving motor) of the vehicle is the generated power of the generator, and the rest part is used for charging the high-voltage battery.
The current remaining capacity of the battery is in a first interval (SOC 4-SOCx), and the driving motor is controlled to consume the electric energy of the battery. When the residual capacity is between SOC4-SOCx, the electric quantity is higher at this moment, and mainly work under the low-speed low-torque state under the jam state, and the high-voltage battery is mainly used for the electric quantity consumption at this moment, except that big throttle, the driver has the power demand, and the speed of a motor reaches a definite value, the engine does not start to do not pass through the generator after the engine starts and give high-voltage battery charging.
And the current residual capacity of the battery is in a second interval (between SOC3 and SOC4), the engine is controlled to work in an economic interval, the engine is controlled to supply the redundant torque to the generator for generating power, and the capacity of the battery is maintained. When the vehicle speed is larger than a certain value and the accelerator is larger than a certain value when the vehicle speed is remained between SOC3 and SOC4, the engine is started for driving, and the generator mainly has the function of adjusting the working point of the engine, so that the power which is not enough in the economic zone is used for the generator to charge the high-voltage battery, the engine is maintained to continuously work in the economic zone, and the high-voltage electric quantity is kept.
The current remaining capacity of the battery is in the third interval (between SOC2 and SOC 3), and the engine is controlled to keep running when torque is required. If the remaining capacity falls between SOC2 and SOC3, the generator is charged with as much power as possible, the engine can be properly moved away from the economy zone with a large driving demand, and part of the air conditioning functions, such as passenger compartment comfort, is limited.
And the current remaining capacity of the battery is positioned in a fourth interval (between SOC1 and SOC 2), the engine is controlled to drive the generator to charge at the maximum allowable power, and the torque demand of the large throttle motor is limited. When the residual capacity of the high-voltage battery is reduced to be between SOC1 and SOC2, speed limitation is carried out at the moment, the engine is forced to drive the generator to charge with the maximum allowable power, meanwhile, the torque requirement of a large throttle motor is limited, and the phenomenon that the capacity of the high-voltage battery is sharply reduced to cause over-discharge or influence the normal work of a safety component is avoided.
And the current residual capacity of the battery is positioned in a fifth interval (between SOCy-SOC 1), and the output power of the driving motor is reduced to a second power, wherein the second power is equal to the power left by subtracting the sum of other electric components from the sum of the engine power and the battery discharging power. If the high-voltage battery capacity is continuously reduced to the range from SOCy to SOC1, the driver needs to be prompted, and the output power of the driving motor is gradually reduced to the sum of (power generation power + battery discharge power) and the power consumption of other power consumption parts.
The control area of the SOC is further widened by refining the partition and the set value of the remaining electric quantity interval and according to the mode of estimating the electric quantity consumed by each electric appliance within a certain time. The high-voltage electric energy utilization rate is improved, and the over-discharge risk of the high-voltage battery is reduced.
As another embodiment of the present invention, further, the adjusting the boundary of each remaining power interval includes:
the method comprises the following steps of obtaining energy consumption input parameters, and using the energy consumption input parameters as coefficients for adjusting the boundary range of the electric quantity interval: and accumulating and integrating the power consumption of the power consumption part and the output electric quantity of the battery to obtain the energy consumption input parameter.
The weighted energy consumption input parameters are used for the boundary values of the remaining energy interval, wherein the energy consumption input parameters are considered from the electricity consumption on one hand and the electricity output on the other hand.
Firstly, the vehicle control unit estimates whether the component works and works with large power, and accumulates the integral to obtain an estimated value, and estimates the electric quantity release demand at the next moment so as to make a relevant corresponding control strategy in advance.
Second, classification of high voltage battery faults gives reference to battery performance what limits the output power at what faults. For example, the maximum output power can only be one-half of the original maximum output power at a temperature exceeding 55 degrees, and may only be one-fourth of the original maximum output power or even lower at a temperature exceeding 65 degrees, thereby protecting the reasonable energy output of the battery.
Referring to fig. 4 and 5, under a congestion condition, an accelerator and a hard brake alternately act, a motor assists power under the accelerator, the brake is recovered, and an SOC change curve changes in a descending zigzag manner, whether the working point of an engine is increased or not is judged until the SOC is reduced to be lower than a certain value for min, and a generator is used for charging a battery, so that the SOC is reduced to a certain degree and then is processed. Considering that electricity driving is mainly used under the condition of congestion, the engine is started early to drive the generator to charge the high-voltage battery, the expression is to improve the boundary values (SOC1, SOC2, SOC3 and SOC4) of each remaining electricity quantity interval, and the output power of the high-voltage battery, namely the consumed power of electric components and a formula pre-estimated in advance are monitored, so that the boundary values are weighted and improved, the high-voltage battery enters the engine to generate electricity in advance, and the electric energy is stored and used for electricity consumption under the condition of congestion.
The boundary of the remaining power interval is adjusted, so that the SOC control space can be further widened. The hybrid driving is realized by charging as much as possible before entering the urban area and discharging more before entering the high-speed road section, and pure electricity is mainly used in the urban area. So as to avoid fuel consumption and emission loss caused by frequent starting and stopping of the engine for acceleration under the working condition of stop and go in urban areas, reduce emission in urban central areas and allow a short slightly higher or lower SOC state of the battery. The high-voltage battery capacity is achieved under the premise that the safety of the vehicle is guaranteed as far as possible under the condition of congested road conditions by carrying out classified management when the electric quantity is low or the battery fails.
Further, the step of obtaining the current remaining power of the battery, determining the remaining power interval in which the current remaining power is located, and controlling charging and discharging of the battery according to the control strategy corresponding to the remaining power interval includes:
and setting a first calibration value in the residual electric quantity interval, and sequentially closing the electric devices according to the priority levels of the electric components when the current residual electric quantity of the battery is lower than the first calibration value.
The high-voltage battery capacity is achieved under the premise that the safety of the vehicle is guaranteed as far as possible under the condition of congested road conditions by carrying out classified management when the electric quantity is low or the battery fails.
When the residual capacity of the high-voltage battery is lower than a certain value or the discharge power is lower than a certain value due to the fault of the high-voltage battery, and the power consumption requirements of all the electric devices (including the driving motor) cannot be met, the power consumption is limited in a grading mode or the electric devices are turned off.
When Lsoc (low-voltage battery residual capacity) is low, DCDC, defrosting and demisting are the first level related to safety; cooling the battery to a second stage; when the accelerator is stepped deeply, the power requirement of the motor is the third level; when Lsoc is high, the power demand of the DCDC is fourth level; the air conditioning requirement of the passenger cabin is the fifth level; when the accelerator is stepped on lightly, the power demand of the motor is the sixth level. According to classification, the high-voltage battery meets all electric devices step by step, the last-stage part which cannot meet the high-voltage battery is taken as a limit, and then the high-voltage battery is closed.
Corresponding to the method, the invention also provides a control device of the hybrid electric vehicle, which comprises the following steps:
the dividing module is used for dividing the residual electric quantity into a plurality of residual electric quantity intervals, and each residual electric quantity interval corresponds to a control strategy;
the adjusting module is used for acquiring an energy consumption input parameter and taking the energy consumption input parameter as a coefficient for adjusting the boundary range of the electric quantity interval;
and the processing module is used for acquiring the current residual electric quantity of the battery, judging the residual electric quantity interval in which the current residual electric quantity is positioned, and controlling charging and discharging of the battery according to a control strategy corresponding to the residual electric quantity interval.
Further, the plurality of remaining power intervals include:
a first interval, a second interval, a third interval, a fourth interval and a fifth interval;
and the electric quantity from the first interval, the second interval, the third interval, the fourth interval to the fifth interval is decreased in sequence.
Further, the processing module is specifically configured to:
the current residual electric quantity of the battery is between the upper limit of the threshold value and the full state, and the generator is controlled to stop generating electricity and the driving motor is controlled to brake, recover and charge;
the current residual electric quantity of the battery is between a lower limit of a threshold value and an empty state, the battery is controlled to stop outputting power outwards, and the generator is controlled to generate power with first power, wherein the first power is equal to the sum of the maximum powers of all electric appliances of the whole vehicle;
the current residual electric quantity of the battery is within a first interval, and the driving motor is controlled to consume the electric energy of the battery;
the current residual electric quantity of the battery is in a second interval, the engine is controlled to work in an economic interval, the engine is controlled to supply redundant torque to the generator to generate electricity, and the electric quantity of the battery is kept;
the current residual capacity of the battery is in a third interval, and the engine is controlled to keep running when a torque demand exists;
the current residual electric quantity of the battery is positioned in a fourth interval, the engine is controlled to drive the generator to charge with the maximum allowable power, and the torque requirement of the large throttle motor is limited;
and when the current residual capacity of the battery is in a fifth interval, reducing the output power of the driving motor to a second power, wherein the second power is equal to the sum of the engine power and the battery discharge power, and subtracting the power left by the sum of other power utilization components.
Further, the adjusting module is specifically configured to:
and accumulating and integrating the power consumption of the power consumption part and the output electric quantity of the battery to obtain the energy consumption input parameter.
Further, the processing module is further configured to:
and setting a first calibration value in the residual electric quantity interval, and sequentially closing the electric devices according to the priority levels of the electric components when the current residual electric quantity of the battery is lower than the first calibration value.
The invention also provides a vehicle control unit which comprises the hybrid electric vehicle control device.
The invention also provides an automobile comprising the vehicle control unit.
In embodiments of the present invention, modules may be implemented in software for execution by various types of processors. An adjustment module may comprise, for instance, one or more physical or logical blocks of computer instructions which may, for instance, be structured as an object, procedure, or function. Nevertheless, the executables of an identified module need not be physically located together, but may comprise disparate instructions stored in different bits which, when joined logically together, comprise the module and achieve the stated purpose for the module.
Indeed, the adjustment module may be a single instruction, or many instructions, and may even be distributed over several different code segments, among different programs, and across several memory devices. Likewise, operational data may be identified within the modules and may be embodied in any suitable form and organized within any suitable type of data structure. The operational data may be collected as a single data set, or may be distributed over different locations including over different storage devices, and may exist, at least partially, merely as electronic signals on a system or network.
When a module can be implemented by software, considering the level of existing hardware technology, a module implemented by software may build a corresponding hardware circuit to implement a corresponding function, without considering cost, and the hardware circuit may include a conventional Very Large Scale Integration (VLSI) circuit or a gate array and an existing semiconductor such as a logic chip, a transistor, or other discrete components. A module may also be implemented in programmable hardware devices such as field programmable gate arrays, programmable array logic, programmable logic devices or the like.
While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the following claims.
Claims (8)
1. A control method for a hybrid vehicle, characterized by comprising:
dividing the residual electric quantity into a plurality of residual electric quantity intervals, wherein each residual electric quantity interval corresponds to a control strategy;
wherein the plurality of remaining power intervals include: a first interval, a second interval, a third interval, a fourth interval and a fifth interval; the electric quantity in the first interval, the second interval, the third interval, the fourth interval and the fifth interval is decreased in sequence;
acquiring an energy consumption input parameter, and taking the energy consumption input parameter as a coefficient for adjusting the boundary range of the electric quantity interval;
acquiring the current residual capacity of the battery, and judging the residual capacity interval of the current residual capacity;
if the current residual electric quantity of the battery is between the upper limit of the threshold value and the full state, controlling the generator to stop generating electricity and driving the motor to brake and recycle the charge, and avoiding the overcharge of the battery;
if the current residual electric quantity of the battery is below a lower threshold value and in a no-load state, controlling the battery to stop outputting power outwards, avoiding over-discharge of the battery, and controlling a generator to generate power with first power, wherein the first power is equal to the sum of the maximum powers of all electric appliances of the whole vehicle;
if the current residual electric quantity of the battery is within a first interval, controlling a driving motor to consume the electric energy of the battery;
if the current residual electric quantity of the battery is in a second interval, controlling the engine to work in an economic interval, controlling the engine to supply redundant torque to the generator to generate power, and keeping the electric quantity of the battery;
if the current residual capacity of the battery is in a third interval, controlling the engine to keep running when torque is required;
if the current residual electric quantity of the battery is in a fourth interval, controlling an engine to drive a generator to charge with maximum allowable power, and limiting the torque requirement of a large throttle motor;
and if the current residual capacity of the battery is in a fifth interval, reducing the output power of the driving motor to a second power, wherein the second power is equal to the sum of the engine power and the battery discharge power, and subtracting the power left by the sum of other power utilization components.
2. The hybrid electric vehicle control method according to claim 1, wherein the step of obtaining the energy consumption input parameter and using the energy consumption input parameter as a coefficient for adjusting the boundary range of the electric quantity interval comprises:
and accumulating and integrating the power consumption of the power consumption part and the output electric quantity of the battery to obtain the energy consumption input parameter.
3. The control method of the hybrid electric vehicle according to claim 1, wherein the step of obtaining the current remaining power of the battery and determining the remaining power interval in which the current remaining power is located includes:
and setting a first calibration value in the residual electric quantity interval, and sequentially closing the electric devices according to the priority levels of the electric components when the current residual electric quantity of the battery is lower than the first calibration value.
4. A hybrid vehicle control device characterized by comprising:
the dividing module is used for dividing the residual electric quantity into a plurality of residual electric quantity intervals, and each residual electric quantity interval corresponds to a control strategy;
wherein the plurality of remaining power intervals include: a first interval, a second interval, a third interval, a fourth interval and a fifth interval; the electric quantity in the first interval, the second interval, the third interval, the fourth interval and the fifth interval is decreased in sequence;
the adjusting module is used for acquiring an energy consumption input parameter and taking the energy consumption input parameter as a coefficient for adjusting the boundary range of the electric quantity interval;
the judging module is used for acquiring the current residual electric quantity of the battery and judging the residual electric quantity interval in which the current residual electric quantity is positioned;
the first processing module is used for controlling the generator to stop generating power and driving the motor to brake, recover and charge if the current residual electric quantity of the battery is between the upper limit of the threshold value and the full-charge state, so that the battery is prevented from being overcharged;
the second processing module is used for controlling the battery to stop outputting power outwards to avoid over-discharge of the battery and controlling the generator to generate power with first power if the current residual electric quantity of the battery is between the lower limit of a threshold value and an empty state, wherein the first power is equal to the sum of the maximum powers of all electric appliances of the whole vehicle;
the third processing module is used for controlling the driving motor to consume the electric energy of the battery if the current residual electric quantity of the battery is within the first interval;
the fourth processing module is used for controlling the engine to work in an economic interval and controlling the engine to supply redundant torque to the generator to generate power and keep the electric quantity of the battery if the current residual electric quantity of the battery is in a second interval;
the fifth processing module is used for controlling the engine to keep running when torque is required if the current residual electric quantity of the battery is in a third interval;
the sixth processing module is used for controlling the engine to drive the generator to charge with the maximum allowable power and limiting the torque requirement of the large throttle motor if the current residual electric quantity of the battery is within a fourth interval;
and the seventh processing module is used for reducing the output power of the driving motor to a second power if the current residual electric quantity of the battery is positioned in a fifth interval, wherein the second power is equal to the sum of the engine power and the battery discharging power and is the power obtained by subtracting the sum of other power utilization components.
5. The hybrid vehicle control device according to claim 4, wherein the adjustment module is specifically configured to:
and accumulating and integrating the power consumption of the power consumption part and the output electric quantity of the battery to obtain the energy consumption input parameter.
6. The hybrid vehicle control apparatus according to claim 4, wherein the determination module is further configured to:
and setting a first calibration value in the residual electric quantity interval, and sequentially closing the electric devices according to the priority levels of the electric components when the current residual electric quantity of the battery is lower than the first calibration value.
7. A vehicle control unit, characterized by comprising the hybrid vehicle control device according to any one of claims 4 to 6.
8. An automobile, characterized by comprising the vehicle control unit according to claim 7.
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| CN111016878B (en) * | 2019-12-05 | 2021-06-11 | 浙江吉利汽车研究院有限公司 | Single-motor hybrid power system power battery electric quantity balance management system and method |
| CN113135096A (en) * | 2020-01-17 | 2021-07-20 | 北京配天技术有限公司 | Electric vehicle energy management control method and system and computer storage medium |
| CN113734142A (en) * | 2020-05-29 | 2021-12-03 | 比亚迪股份有限公司 | Hybrid vehicle, control method thereof, vehicle control unit and storage medium |
| CN112699551A (en) * | 2020-12-28 | 2021-04-23 | 长城汽车股份有限公司 | High-voltage battery charging method and device, storage medium and electronic equipment |
| CN112622646A (en) * | 2021-01-04 | 2021-04-09 | 中车青岛四方车辆研究所有限公司 | Whole vehicle control method suitable for bow net current collection system and bow net current collection system |
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| CN101284532B (en) * | 2007-12-28 | 2012-03-28 | 奇瑞汽车股份有限公司 | Control method of battery charge state SOC for hybrid electric vehicle |
| JP4697247B2 (en) * | 2008-03-03 | 2011-06-08 | 日産自動車株式会社 | Hybrid vehicle |
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