CN110126672A - The Poewr control method and its device and vehicle of vehicle - Google Patents
The Poewr control method and its device and vehicle of vehicle Download PDFInfo
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- CN110126672A CN110126672A CN201910251942.XA CN201910251942A CN110126672A CN 110126672 A CN110126672 A CN 110126672A CN 201910251942 A CN201910251942 A CN 201910251942A CN 110126672 A CN110126672 A CN 110126672A
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 230000009467 reduction Effects 0.000 claims description 13
- 238000011084 recovery Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Classifications
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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
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
- B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
-
- 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
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/42—Drive Train control parameters related to electric machines
-
- 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
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/54—Drive Train control parameters related to batteries
- B60L2240/547—Voltage
-
- 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
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/54—Drive Train control parameters related to batteries
- B60L2240/549—Current
-
- 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
-
- 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
- Y02T10/72—Electric energy management in electromobility
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention discloses a kind of Poewr control method of vehicle, device and vehicles, wherein method includes: to obtain the current actual discharge power of vehicle and current available discharge power；According to the actual discharge power and the size with discharge power, judge whether to limit the actual discharge power of the vehicle；If so, can be compared with discharge power with the maximum of discharge power and/or the vehicle to the actual discharge power with described, and according to comparison result, reduces the available discharge power of the vehicle or reduce the driving power of motor.In this way, by way of taking the available discharge power for reducing vehicle or reducing the driving power of motor, the actual discharge power of vehicle is limited, can avoid the actual discharge power of vehicle as far as possible is more than that maximum can use discharge power, and then reduce the probability that vehicle emergent power transfinites.
Description
Technical field
The present invention relates to automobile technical field more particularly to a kind of Poewr control methods of vehicle, device and vehicle.
Background technique
Currently, various energy-saving and environment-friendly new-energy automobiles continue to bring out, especially electric car and hybrid vehicle is got over
More be concerned by people and favor, this is main be have benefited from new energy, new material, high-performance microprocessor technology and
The progress and breakthrough of great-capacity power battery technology, so that people have new understanding to electric car and hybrid vehicle.
New-energy automobile is in actually driving, due to being limited by Motor Capability, cell potential etc., it usually needs drive to it
Torque carries out a series of limit value processing, to guarantee that the driving power of automobile is no more than the driving power that system allows.Currently, common
Mode be the maximum permissible torque of motor is obtained by the external characteristics of motor, and according to by battery maximum allowable driving power
The torque being calculated carries out limit value to the driving torque of motor.However, this mode due to computational accuracy bring error or
There is actual discharge power more than the available normal range (NR) of system, so as to cause electricity with leading to greater probability in calculation etc.
There is the problems such as over-discharge in pond, this will cause security risk to battery and motor even traffic safety, and lasting power transfinites
Situation can also cause the system failure.
Summary of the invention
The Poewr control method, device and vehicle for being designed to provide a kind of vehicle of the embodiment of the present invention solve existing
There is the problem of actual discharge power is more than system available normal range (NR) with having the easy greater probability of vehicle.
In order to achieve the above object, the embodiment of the present invention provides a kind of Poewr control method of vehicle, comprising:
Obtain the current actual discharge power of vehicle and current available discharge power；
According to the actual discharge power and the size with discharge power, judge whether the reality to the vehicle
Discharge power is limited；
If so, can be put with the maximum of discharge power and/or the vehicle is available to the actual discharge power with described
Electrical power is compared, and according to comparison result, is reduced the available discharge power of the vehicle or reduced the driving function of motor
Rate.
Optionally, described according to the actual discharge power and the size with discharge power, judge whether to institute
The actual discharge power for stating vehicle is limited, comprising:
Whether the difference that the actual discharge power can be subtracted described in judgement with discharge power is less than preset threshold；
Wherein, the case where the difference that can subtract the actual discharge power with discharge power is less than preset threshold
Under, judgement limits the actual discharge power of the vehicle.
Optionally, it is described to the actual discharge power and it is described can with the maximum of discharge power and/or the vehicle
It is compared with discharge power, and according to comparison result, reduces the available discharge power of the vehicle or reduce the drive of motor
Dynamic power, comprising:
The actual discharge power can be compared with the maximum of the vehicle with discharge power；
In the case where the actual discharge power, which is less than or equal to the maximum, to use discharge power, the vehicle is reduced
Available discharge power；
In the case where the actual discharge power, which is greater than the maximum, to use discharge power, the driving function of motor is reduced
Rate.
Optionally, it is described to the actual discharge power and it is described can with the maximum of discharge power and/or the vehicle
It is compared with discharge power, and according to comparison result, reduces the available discharge power of the vehicle or reduce the drive of motor
Dynamic power, comprising:
The actual discharge power can be compared with described with discharge power；
In the case where the actual discharge power can use discharge power less than or equal to described in, by the available of the vehicle
Discharge power reduces the first performance number；
In the case where the actual discharge power can use discharge power greater than described in, by the available electric discharge function of the vehicle
Rate reduces the second performance number, wherein second performance number is greater than first performance number.
Optionally, it is described to the actual discharge power and it is described can with the maximum of discharge power and/or the vehicle
It is compared with discharge power, and according to comparison result, reduces the available discharge power of the vehicle or reduce the drive of motor
Dynamic power, comprising:
The actual discharge power can be carried out with described with the maximum of discharge power and the vehicle with discharge power
Compare；
In the case where the actual discharge power can use discharge power less than or equal to described in, by the available of the vehicle
Discharge power reduces third performance number；
Discharge power can be used described in being greater than in the actual discharge power, and be less than or equal to the maximum to use electric discharge function
In the case where rate, the available discharge power of the vehicle is reduced into the 4th performance number, wherein the 4th performance number is greater than described
Third performance number；
In the case where the actual discharge power, which is greater than the maximum, to use discharge power, the driving function of motor is reduced
Rate.
Optionally, the driving power for reducing motor, comprising:
The driving power of motor is reduced into the 5th performance number, wherein the 5th performance number is equal to the actual discharge function
Rate, which subtracts the maximum, can use the difference of discharge power.
Optionally, after the driving power for reducing motor, the method also includes:
According to the driving power of motor after reduction power, maximum allowable driving torque is calculated；
According to the maximum allowable driving torque, the driving torque of limiting motor, to limit the actual discharge of the vehicle
Power.
Optionally, described to judge whether after limiting the actual discharge power of the vehicle, the method is also wrapped
It includes:
Determining to be not required to limit the actual discharge power of the vehicle, and it is described can be less than with discharge power it is described
In the case that maximum can be with discharge power, increase the available discharge power of the vehicle, wherein available after the vehicle increase
Discharge power, which is no more than the maximum, can use discharge power.
The embodiment of the present invention also provides a kind of power control device of vehicle, comprising:
Module is obtained, for obtaining the current actual discharge power of vehicle and current available discharge power；
Judgment module, for according to the actual discharge power and the size with discharge power, judging whether pair
The actual discharge power of the vehicle is limited；
Power control module is used for if so, to the actual discharge power and described using discharge power and/or described
The maximum of vehicle can be compared with discharge power, and according to comparison result, reduce the vehicle available discharge power or
Reduce the driving power of motor.
Optionally, the judgment module is used to judge the difference that the actual discharge power can be subtracted with discharge power
Whether preset threshold is less than；
Wherein, the case where the difference that can subtract the actual discharge power with discharge power is less than preset threshold
Under, judgement limits the actual discharge power of the vehicle.
Optionally, the power control module includes:
First comparing unit can be compared for the maximum to the actual discharge power and the vehicle with discharge power
Compared with；
First power control unit can use discharge power for being less than or equal to the maximum in the actual discharge power
In the case where, reduce the available discharge power of the vehicle；
Second power control unit, for being greater than the case where maximum can use discharge power in the actual discharge power
Under, reduce the driving power of motor.
Optionally, the power control module includes:
Second comparing unit, for that can be compared with discharge power to the actual discharge power with described；
Third power control unit, for being less than or equal to the feelings that can use discharge power in the actual discharge power
Under condition, the available discharge power of the vehicle is reduced into the first performance number；
4th power control unit, in the case where being used to that discharge power can be used greater than described in the actual discharge power,
The available discharge power of the vehicle is reduced into the second performance number, wherein second performance number is greater than first performance number.
Optionally, the power control module includes:
Third comparing unit, for the actual discharge power and the maximum with discharge power and the vehicle
It can be compared with discharge power；
5th power control unit, for being less than or equal to the feelings that can use discharge power in the actual discharge power
Under condition, the available discharge power of the vehicle is reduced into third performance number；
6th power control unit, for the actual discharge power be greater than it is described can use discharge power, and be less than or
In the case where can be with discharge power equal to the maximum, the available discharge power of the vehicle be reduced into the 4th performance number, wherein
4th performance number is greater than the third performance number；
7th power control unit, for being greater than the case where maximum can use discharge power in the actual discharge power
Under, reduce the driving power of motor.
Optionally, the power control module, which is used to be greater than the maximum in the actual discharge power, can use discharge power
In the case where, the driving power of motor is reduced into the 5th performance number, wherein the 5th performance number is equal to the actual discharge function
Rate, which subtracts the maximum, can use the difference of discharge power.
Optionally, the power control module further include:
Computing unit calculates maximum allowable driving torque for the driving power according to motor after reduction power；
Limiting unit, for according to the maximum allowable driving torque, the driving torque of limiting motor, to limit the vehicle
Actual discharge power.
Optionally, described device further include:
Recovery module, for determining to be not required to limit the actual discharge power of the vehicle, and it is described can be with putting
In the case that electrical power can be with discharge power less than the maximum, increase the available discharge power of the vehicle, wherein the vehicle
Increase after available discharge power be no more than the maximum can use discharge power.
The embodiment of the present invention also provides a kind of vehicle, the power control dress including vehicle provided by the embodiment of the present invention
It sets.
In the embodiment of the present invention, by obtaining the current actual discharge power of vehicle and current available discharge power, and
According to the size of acquired actual discharge power and available discharge power, judge whether to carry out the actual discharge power of vehicle
Limitation, when determining to need to limit the actual discharge power of vehicle, further according to actual discharge power and available electric discharge
It is that the maximum of power and/or vehicle can be compared with discharge power as a result, take the available discharge power for reducing vehicle or
The mode for reducing the driving power of motor, limits the actual discharge power of vehicle, to avoid actually putting for vehicle as far as possible
Electrical power is more than that maximum can use discharge power, and then reduce the probability that vehicle emergent power transfinites.
Detailed description of the invention
Fig. 1 is a kind of flow chart of the Poewr control method of vehicle provided in an embodiment of the present invention；
Fig. 2 is a kind of example schematic of the Poewr control method of vehicle provided in an embodiment of the present invention；
Fig. 3 is a kind of structural schematic diagram of the power control device of vehicle provided in an embodiment of the present invention；
Fig. 4 is a kind of structural representation of the power control module of the power control device of vehicle provided in an embodiment of the present invention
Figure；
Fig. 5 is that the structure of the power control module of the power control device of another vehicle provided in an embodiment of the present invention is shown
It is intended to；
Fig. 6 is that the structure of the power control module of the power control device of another vehicle provided in an embodiment of the present invention is shown
It is intended to；
Fig. 7 is that the structure of the power control module of the power control device of another vehicle provided in an embodiment of the present invention is shown
It is intended to；
Fig. 8 is the structural schematic diagram of the power control device of another vehicle provided in an embodiment of the present invention.
Specific embodiment
To keep the technical problem to be solved in the present invention, technical solution and advantage clearer, below in conjunction with attached drawing and tool
Body embodiment is described in detail.
It is a kind of flow chart for the Poewr control method that the embodiment of the present invention provides vehicle referring to Fig. 1, Fig. 1, such as Fig. 1 institute
Show, comprising the following steps:
Step 101 obtains the current actual discharge power of vehicle and current available discharge power.
Above-mentioned actual discharge power can be the vehicle current actual discharge power P of battery in operationreal, can basis
Battery current voltage U and electric current I is calculated, i.e. Preal=U × I.
The currently available discharge power P of the battery that above-mentioned available discharge power can be vehiclemaxlim, initial value is equal to
The maximum of vehicle can use discharge power Pmax, it is described can be changed with the practical operation situation of vehicle with discharge power, such as with vehicle
Actual discharge power increase and reduce.
The current actual discharge power of above-mentioned acquisition vehicle and current available discharge power, can be real-time monitoring vehicle
The current available discharge power of current actual discharge power and reading vehicle, is also possible to obtain a train every the set time
Current actual discharge power and current available discharge power, such as obtained once every 1 minute.
Step 102, according to the actual discharge power and the size with discharge power, judge whether to the vehicle
Actual discharge power limited.
It, can be according to the big of the current actual discharge power of the vehicle of acquisition and available discharge power in the step
It is small, to determine whether need the actual discharge power of the vehicle is limited, i.e., judgement currently whether meet to vehicle into
The condition of row power limit.Specifically, it can be by comparing the actual discharge power and described big with discharge power
Small or difference, to determine whether needing to limit the actual discharge power of the vehicle.
In the case where determining to need to limit the actual discharge power of the vehicle, step 103 is executed；Determining
It does not need in the case where limiting the actual discharge power of the vehicle, then shows at the actual discharge power of current vehicle
In normal range (NR), can not the actual discharge power to vehicle do any restrictions processing.
For example, showing that the vehicle is current when the actual discharge power can use discharge power more than or equal to described in
Actual discharge power it is excessive, i.e., will be more than or already exceed the maximum available discharge power of system, thus can be determined that for need
Will the actual discharge power to the vehicle limit；In another example the actual discharge can be subtracted with discharge power when described
When the difference of power is less than certain value, show the current actual discharge power of the vehicle relatively current available electric discharge function
Rate, if the actual discharge power of the vehicle continues to increase, it is likely that the case where emergent power transfinites, and when it is described can be with putting
When electrical power subtracts the difference of the actual discharge power less than zero, show to have had already appeared the case where power transfinites, therefore, this
When be also judged to needing to limit the actual discharge power of the vehicle.
Optionally, the step 102 includes:
Whether the difference that the actual discharge power can be subtracted described in judgement with discharge power is less than preset threshold；
Wherein, the case where the difference that can subtract the actual discharge power with discharge power is less than preset threshold
Under, judgement limits the actual discharge power of the vehicle.
The case where emergent power does not transfinite to be further ensured that the actual discharge power of vehicle, can preset a difference
Be worth threshold value, after obtaining the current actual discharge power of the vehicle and current available discharge power, just to it is described can be with putting
The difference that electrical power subtracts the actual discharge power is compared with the difference threshold, to judge currently whether need to described
The actual discharge power of vehicle is limited.
Specifically, when the difference that can subtract the actual discharge power with discharge power is less than preset difference
When threshold value, show that the current actual discharge power of the vehicle is closer to available discharge power, if the reality of the vehicle
Discharge power continue to increase then there is the possibility that transfinites or the current actual discharge power of the vehicle already exceed it is described can
With discharge power, can determine that at this time to need to limit the actual discharge power of the vehicle；When described with electric discharge function
When the difference that rate subtracts the actual discharge power is greater than or equal to preset difference threshold, show that the vehicle is current
Actual discharge power is smaller, the possibility not transfinited, and is can determine that at this time as that wouldn't need the actual discharge power to the vehicle
It is limited.
In this way, whether being less than default threshold by the difference that can subtract the actual discharge power described in judgement with discharge power
Value, to determine whether the actual discharge power to the vehicle limits, can guarantee timely and accurately to judge vehicle
Power transfinite may situation, and then power limit measure can be taken in time to avoid or eliminate power overrun condition.
Step 103 can put the actual discharge power with described with the maximum of discharge power and/or the vehicle is available
Electrical power is compared, and according to comparison result, is reduced the available discharge power of the vehicle or reduced the driving function of motor
Rate.
In the case where determination limits the actual discharge power of the vehicle, further can actually be put to described
Electrical power can be compared with described with discharge power, and/or available to the maximum of the actual discharge power and the vehicle
Discharge power is compared, and then according to comparison result, is taken the available discharge power for reducing the vehicle or is reduced motor
The mode of driving power limited come the actual discharge power to the vehicle.
For example, according to the actual discharge power and the size comparing result with discharge power, different amplitudes
Discharge power can be used described in reduction, to limit the driving torque of vehicle；Or according to the actual discharge power and the maximum
The size comparing result that discharge power can be used reduces the available discharge power of the vehicle or reduces the driving power of motor,
The driving torque of vehicle is limited in various degree；Or it can also be according to the actual discharge power and the electric discharge function
The size comparing result of rate and the actual discharge power and the maximum can use the size comparing result of discharge power, no
Discharge power can be used described in amplitude reducing, or reduces the driving power of motor, limit vehicle in various degree step by step
Driving torque, and then achieve the purpose that limit vehicle actual discharge power.
Optionally, the step 103 includes:
The actual discharge power can be compared with the maximum of the vehicle with discharge power；
In the case where the actual discharge power, which is less than or equal to the maximum, to use discharge power, the vehicle is reduced
Available discharge power；
In the case where the actual discharge power, which is greater than the maximum, to use discharge power, the driving function of motor is reduced
Rate.
It, can be to institute in the case where determination limits the actual discharge power of vehicle in the first embodiment
Stating actual discharge power can be compared with the maximum of the vehicle with discharge power, when the actual discharge power is less than or waits
When the maximum can use discharge power, shows the vehicle currently also non-emergent power overrun condition, can only reduce at this time
The available discharge power of the vehicle；When the actual discharge power, which is greater than the maximum, to use discharge power, show described
The current emergent power overrun condition of vehicle, can reduce the driving power of motor at this time, be turned round with quickly limiting the driving of vehicle
Square.In this way, being taken by the way that according to the actual discharge power and the maximum different size relationship between discharge power can be used
It reduces the available discharge power of vehicle or reduces the mode of the driving power of motor, the driving of vehicle can be limited to some extent
Torque, and then achieve the purpose that the actual discharge power for limiting vehicle.
Wherein, the available discharge power for reducing the vehicle can be the mode taken and gradually reduced, as will be described
The available discharge power of vehicle once reduces Δ P1, until by the actual discharge power limit of vehicle in the normal range (NR) not transfinited
Within；The driving power for reducing motor, which can be the reduction actual discharge power and the maximum, can use discharge power
Difference reduces the part transfinited, the actual discharge power of the vehicle is rapidly reduced to the normal range (NR) not transfinited
Within.
Optionally, the step 103 includes:
The actual discharge power can be compared with described with discharge power；
In the case where the actual discharge power can use discharge power less than or equal to described in, by the available of the vehicle
Discharge power reduces the first performance number；
In the case where the actual discharge power can use discharge power greater than described in, by the available electric discharge function of the vehicle
Rate reduces the second performance number, wherein second performance number is greater than first performance number.
It, can be to institute in the case where determination limits the actual discharge power of vehicle in second of embodiment
Stating actual discharge power can be compared with described with discharge power, when the actual discharge power can be used less than or equal to described
When discharge power, show the vehicle currently also non-emergent power overrun condition, can slightly reduce the vehicle at this time can
With discharge power, the available discharge power of vehicle reduces the first performance number Δ P1 as will be described；When the actual discharge power is big
In it is described use discharge power when, show the vehicle currently and will occur or emergent power overrun condition, can add at this time
The amplitude of the available discharge power of the vehicle is reduced greatly, and the available discharge power of vehicle reduces the second performance number Δ as will be described
P2, wherein the second performance number Δ P2 is greater than the first performance number Δ P1.In this way, by according to the actual discharge function
Rate and the different size relationship between discharge power, reduce the available discharge power of vehicle with taking different amplitudes,
The driving torque of vehicle can be limited to some extent, and then achieve the purpose that the actual discharge power for limiting vehicle.
Wherein, the available discharge power by the vehicle reduces the first performance number Δ P1 and described by the vehicle
The second performance number Δ P2 can be reduced with discharge power to be also possible to take the mode gradually reduced, such as in the actual discharge power
Less than or equal to described in the case where discharge power, the available discharge power of the vehicle is once reduced into Δ P1, if institute
State actual discharge power persistently increase above it is described can use discharge power, then the available discharge power of the vehicle is once dropped
Low delta p 2, until by the actual discharge power limit of vehicle within the normal range (NR) not transfinited.
Optionally, the step 103 includes:
The actual discharge power can be carried out with described with the maximum of discharge power and the vehicle with discharge power
Compare；
In the case where the actual discharge power can use discharge power less than or equal to described in, by the available of the vehicle
Discharge power reduces third performance number；
Discharge power can be used described in being greater than in the actual discharge power, and be less than or equal to the maximum to use electric discharge function
In the case where rate, the available discharge power of the vehicle is reduced into the 4th performance number, wherein the 4th performance number is greater than described
Third performance number；
In the case where the actual discharge power, which is greater than the maximum, to use discharge power, the driving function of motor is reduced
Rate.
It, can be to institute in the case where determination limits the actual discharge power of vehicle in the third embodiment
Stating actual discharge power can be compared with described with discharge power, and available to the actual discharge power and the maximum
Discharge power is compared.Specifically, first the actual discharge power can be compared with described with discharge power,
In the case that the actual discharge power can be with discharge power greater than described in, then can to the actual discharge power and the maximum
It is compared, first the actual discharge power can also be compared with the maximum with discharge power with discharge power,
The actual discharge power be less than the maximum can use discharge power in the case where, then to the actual discharge power with it is described
It can be compared with discharge power.
In the embodiment, when the actual discharge power can use discharge power less than or equal to described in, show described
The current also non-emergent power overrun condition of vehicle, can reduce the available discharge power of the vehicle, slightly at this time to slow down vehicle
Driving torque increase tendency, as will be described vehicle available discharge power reduce third performance number Δ P3；When the reality
Border discharge power be greater than it is described can use discharge power, and when being less than or equal to the maximum and can use discharge power, show the vehicle
A possibility that power transfinites is larger, can increase the amplitude for reducing the available discharge power of the vehicle, at this time with further
Slowing down the increase tendency of the driving torque of vehicle, the available discharge power of vehicle reduces the 4th performance number Δ P4 as will be described,
In, the 4th performance number Δ P4 is greater than the third performance number Δ P3；When the actual discharge power can greater than the maximum
When with discharge power, shows the vehicle currently emergent power overrun condition, the driving power of motor can be reduced at this time, with
The quickly driving torque of limitation vehicle.
It should be noted that the third performance number Δ P3 may be the same or different with aforementioned first performance number Δ P1,
The first performance number Δ P1 as described in being slightly larger than the third performance number Δ P3 or be slightly smaller than；The 4th performance number Δ P4 with
Aforementioned second performance number Δ P2 may be the same or different, and such as the 4th performance number Δ P4 can be slightly larger than or be slightly smaller than
The second performance number Δ P2.
In this way, by the way that according to the actual discharge power discharge power can be used with discharge power and the maximum with described
Between different size relationship, reduce with taking different amplitudes vehicle available discharge power or reduce motor driving power,
So as to limit the driving torque of vehicle in various degree step by step, and then reach the actual discharge for gently limiting vehicle
The purpose of power.
Optionally, the driving power for reducing motor, comprising:
The driving power of motor is reduced into the 5th performance number, wherein the 5th performance number is equal to the actual discharge function
Rate, which subtracts the maximum, can use the difference of discharge power.
In above embodiment, the driving power for reducing motor, can be preferably by the driving power P of motordrvDrop
Low 5th performance number Δ P5, the 5th performance number Δ P5 are equal to the actual discharge power PrealMaximum can be used is subtracted to put
Electrical power PmaxDifference, i.e. Δ P5=Preal-Pmax, Pdrv'=Pdrv-(Preal-Pmax)。
In this way, can go out in the vehicle when the actual discharge power, which is greater than the maximum, to use discharge power
In the case that existing power transfinites, directly the driving power reduction actual discharge power of the motor of the vehicle is subtracted described
Maximum can use the difference of discharge power, carry out limit value with the driving torque quickly to the vehicle, make actually putting for the vehicle
Electrical power be quickly reduced to be less than the maximum can be within the normal range (NR) of discharge power, to reach prevention vehicle power
The phenomenon that transfiniting.
Optionally, after the driving power for reducing motor, the method also includes:
According to the driving power of motor after reduction power, maximum allowable driving torque is calculated；
According to the maximum allowable driving torque, the driving torque of limiting motor, to limit the actual discharge of the vehicle
Power.
It, can be according to the available driving function of motor after reduction after the driving power for reducing motor in the embodiment
Rate calculates the maximum allowable driving torque of the vehicle, such as according to the relation formula of power and torque, calculates described maximum allowable
Driving torque.It then can be according to the maximum allowable driving torque, the driving torque of limiting motor, specifically, the vehicle
Torque processing module can be with the maximum allowable driving torque of the quick response after limit value, so that the driving of motor be turned round
Square is limited in no more than within the scope of the maximum allowable driving torque, and then reaches the actual discharge function for limiting the vehicle
The purpose of rate.
Optionally, after the step 102, the method also includes:
Determining to be not required to limit the actual discharge power of the vehicle, and it is described can be less than with discharge power it is described
In the case that maximum can be with discharge power, increase the available discharge power of the vehicle, wherein available after the vehicle increase
Discharge power, which is no more than the maximum, can use discharge power.
In the embodiment, determining to be not required to limit the actual discharge power of the vehicle, it is such as described can be with putting
When the difference that electrical power subtracts the actual discharge power is greater than preset threshold, if described can be less than the maximum with discharge power
Discharge power can be used, then can increase the available discharge power of the vehicle, that is, restore the available discharge power of the vehicle, is had
Body, it can be the mode taken and be stepped up, the available discharge power of vehicle once increases Δ P5 as will be described, until by institute
The available discharge power for stating vehicle restores that discharge power can be used to the maximum.
In this way, when vehicle is in safer operating status, it can be by the available amplifying power of the vehicle gradually
Restore that discharge power can be used to the maximum, so that the subsequent actual discharge that can more precisely judge whether to the vehicle
Power is limited, and also be can reach and is maximally utilized to the battery of the vehicle.
Below with reference to Fig. 2, the specific embodiment of the embodiment of the present invention is illustrated by way of example:
Step 201, the voltage U and electric current I that vehicle battery-end can be acquired first, and obtain the available discharge power of battery
PmaxlimDischarge power P can be used with maximummax, wherein when initialization, the available discharge power P of vehiclemaxlimIt is available equal to maximum
Discharge power Pmax, that is, P when initializingmaxlim=Pmax。
Step 202, voltage U and electric current I according to acquisition, calculate the actual discharge power P of battery-endreal, wherein Preal
=U × I.
Step 203, judgement can use discharge power PmaxlimSubtract actual discharge power PrealDifference whether be less than default threshold
Value P1 and be greater than 0, that is, judge 0 < Pmaxlim-PrealWhether < P1 is true.
In the step, if 0 < Pmaxlim-Preal< P1, thens follow the steps 204.
Step 204 can use discharge power PmaxlimReduce Δ P1, i.e. Pmaxlim'=Pmaxlim-ΔP1。
If step 205, Pmaxlim-Preal>=P1 can then use discharge power PmaxlimGradually restore that electric discharge can be used to maximum
Power Pmax。
After step 206, step 204, if actual discharge power PrealContinue to increase, then judges actual discharge power again
PrealWhether available discharge power P is greater thanmaxlimAnd discharge power P can be used less than maximummax, that is, judge Pmaxlim<Preal<PmaxIt is
No establishment.
In the step, if Pmaxlim<Preal<Pmax, then follow the steps 207；If Preal<Pmaxlim, then return step 203 into
Row judgement.
Step 207 can use discharge power PmaxlimReduce Δ P2, i.e. Pmaxlim'=PmaxlimΔ P2, wherein Δ P2 > Δ
P1。
After step 208, step 207, if actual discharge power PrealContinue to increase, then judges actual discharge power again
PrealDischarge power P can be used by whether being greater than maximummax, that is, judge Preal>PmaxIt is whether true.
In the step, if Preal>Pmax, then follow the steps 209；If Preal<Pmax, then return step 206 and judged.
Step 209, the driving power P by motordrvReduce actual discharge power PrealDischarge power can be used by subtracting maximum
PmaxDifference, i.e. Pdrv'=Pdrv-(Preal-Pmax).It step 209 and then returns to step 208 and is judged.
The Poewr control method of vehicle in the embodiment of the present invention, by obtaining the current actual discharge power of vehicle and working as
Preceding available discharge power, and according to the size of acquired actual discharge power and available discharge power, judge whether to vehicle
Actual discharge power limited, determine need to limit the actual discharge power of vehicle when, further according to reality
The maximum of border discharge power and available discharge power and/or vehicle can be compared with discharge power as a result, taking reduction vehicle
Available discharge power or reduce motor driving power mode, the actual discharge power of vehicle is limited, with
Avoid as far as possible vehicle actual discharge power be more than maximum can with discharge power, and then reduce vehicle emergent power transfinite it is general
Rate.
It is a kind of structural schematic diagram for the power control device that the embodiment of the present invention provides vehicle, such as Fig. 3 referring to Fig. 3, Fig. 3
Shown, the power control device 300 of vehicle includes:
Module 301 is obtained, for obtaining the current actual discharge power of vehicle and current available discharge power；
Judgment module 302, for judging whether according to the actual discharge power and the size with discharge power
The actual discharge power of the vehicle is limited；
Power control module 303, be used for if so, to the actual discharge power and it is described with discharge power and/or
The maximum of the vehicle can be compared with discharge power, and according to comparison result, reduce the available discharge power of the vehicle
Or reduce the driving power of motor.
Optionally, judgment module 302 is used to judge the difference that the actual discharge power can be subtracted with discharge power
Whether preset threshold is less than；
Wherein, the case where the difference that can subtract the actual discharge power with discharge power is less than preset threshold
Under, judgement limits the actual discharge power of the vehicle.
Optionally, as shown in figure 4, power control module 303 includes:
First comparing unit 3031, for the maximum to the actual discharge power and the vehicle can with discharge power into
Row compares；
First power control unit 3032 can use electric discharge for being less than or equal to the maximum in the actual discharge power
In the case where power, the available discharge power of the vehicle is reduced；
Second power control unit 3033 can use discharge power for being greater than the maximum in the actual discharge power
In the case of, reduce the driving power of motor.
Optionally, as shown in figure 5, power control module 303 includes:
Second comparing unit 3034, for that can be compared with discharge power to the actual discharge power with described；
Third power control unit 3035, for discharge power can be used less than or equal to described in the actual discharge power
In the case where, the available discharge power of the vehicle is reduced into the first performance number；
4th power control unit 3036, for being greater than described the case where can using discharge power in the actual discharge power
Under, the available discharge power of the vehicle is reduced into the second performance number, wherein second performance number is greater than first power
Value.
Optionally, as shown in fig. 6, power control module 303 includes:
Third comparing unit 3037, for the actual discharge power and described with discharge power and the vehicle
Maximum can be compared with discharge power；
5th power control unit 3038, for discharge power can be used less than or equal to described in the actual discharge power
In the case where, the available discharge power of the vehicle is reduced into third performance number；
6th power control unit 3039, for discharge power can be used greater than described in the actual discharge power, and it is small
In or be equal to the maximum and the available discharge power of the vehicle can be reduced into the 4th performance number in the case where discharge power,
Wherein, the 4th performance number is greater than the third performance number；
7th power control unit 3040 can use discharge power for being greater than the maximum in the actual discharge power
In the case of, reduce the driving power of motor.
Optionally, power control module 303, which is used to be greater than the maximum in the actual discharge power, can use discharge power
In the case where, the driving power of motor is reduced into the 5th performance number, wherein the 5th performance number is equal to the actual discharge function
Rate, which subtracts the maximum, can use the difference of discharge power.
Optionally, as shown in fig. 7, power control module 303 further include:
Computing unit 3041 calculates maximum allowable driving torque for the driving power according to motor after reduction power；
Limiting unit 3042, for according to the maximum allowable driving torque, the driving torque of limiting motor, to limit
State the actual discharge power of vehicle.
Optionally, as shown in figure 8, the power control device 300 of vehicle further include:
Recovery module 305 for determining to be not required to limit the actual discharge power of the vehicle, and described is used
In the case that discharge power can be with discharge power less than the maximum, increase the available discharge power of the vehicle, wherein described
Available discharge power after vehicle increases can use discharge power no more than the maximum.
The power control device 300 of vehicle can be realized each process in the embodiment of the method for Fig. 1 and Fig. 2, to avoid
It repeats, which is not described herein again.
The power control device of vehicle in the embodiment of the present invention is by obtaining the current actual discharge power of vehicle and working as
Preceding available discharge power, and according to the size of acquired actual discharge power and available discharge power, judge whether to vehicle
Actual discharge power limited, determine need to limit the actual discharge power of vehicle when, further according to reality
The maximum of border discharge power and available discharge power and/or vehicle can be compared with discharge power as a result, taking reduction vehicle
Available discharge power or reduce motor driving power mode, the actual discharge power of vehicle is limited, with
Avoid as far as possible vehicle actual discharge power be more than maximum can with discharge power, and then reduce vehicle emergent power transfinite it is general
Rate.
The embodiment of the present invention also provides a kind of vehicle, the power control dress including vehicle described in any one of Fig. 3 to Fig. 8
Set, in the present embodiment, the vehicle can reach with Fig. 3 to the identical beneficial effect of embodiment shown in Fig. 8, to avoid repeating,
Which is not described herein again.
The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, without departing from the principles of the present invention, several improvements and modifications can also be made, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (17)
1. a kind of Poewr control method of vehicle characterized by comprising
Obtain the current actual discharge power of vehicle and current available discharge power；
According to the actual discharge power and the size with discharge power, judge whether the actual discharge to the vehicle
Power is limited；
If so, electric discharge function can be used with the maximum of discharge power and/or the vehicle with described to the actual discharge power
Rate is compared, and according to comparison result, is reduced the available discharge power of the vehicle or reduced the driving power of motor.
2. the method according to claim 1, wherein it is described according to the actual discharge power and it is described can be with putting
The size of electrical power judges whether to limit the actual discharge power of the vehicle, comprising:
Whether the difference that the actual discharge power can be subtracted described in judgement with discharge power is less than preset threshold；
Wherein, in the case where the difference that can subtract the actual discharge power with discharge power is less than preset threshold, sentence
It is fixed that the actual discharge power of the vehicle is limited.
3. the method according to claim 1, wherein described discharge to the actual discharge power with described use
The maximum of power and/or the vehicle can be compared with discharge power, and according to comparison result, reduce the available of the vehicle
Discharge power or the driving power for reducing motor, comprising:
The actual discharge power can be compared with the maximum of the vehicle with discharge power；
In the case where the actual discharge power, which is less than or equal to the maximum, to use discharge power, reduce the vehicle can
Use discharge power；
In the case where the actual discharge power, which is greater than the maximum, to use discharge power, the driving power of motor is reduced.
4. the method according to claim 1, wherein described discharge to the actual discharge power with described use
The maximum of power and/or the vehicle can be compared with discharge power, and according to comparison result, reduce the available of the vehicle
Discharge power or the driving power for reducing motor, comprising:
The actual discharge power can be compared with described with discharge power；
In the case where the actual discharge power can use discharge power less than or equal to described in, by the available electric discharge of the vehicle
Power reduces the first performance number；
In the case where the actual discharge power can use discharge power greater than described in, the available discharge power of the vehicle is dropped
Low second performance number, wherein second performance number is greater than first performance number.
5. the method according to claim 1, wherein described discharge to the actual discharge power with described use
The maximum of power and/or the vehicle can be compared with discharge power, and according to comparison result, reduce the available of the vehicle
Discharge power or the driving power for reducing motor, comprising:
The actual discharge power can be compared with described with the maximum of discharge power and the vehicle with discharge power；
In the case where the actual discharge power can use discharge power less than or equal to described in, by the available electric discharge of the vehicle
Power reduces third performance number；
Discharge power can be used described in being greater than in the actual discharge power, and be less than or equal to the maximum to use discharge power
In the case of, the available discharge power of the vehicle is reduced into the 4th performance number, wherein the 4th performance number is greater than the third
Performance number；
In the case where the actual discharge power, which is greater than the maximum, to use discharge power, the driving power of motor is reduced.
6. the method according to claim 3 or 5, which is characterized in that the driving power for reducing motor, comprising:
The driving power of motor is reduced into the 5th performance number, wherein the 5th performance number is equal to the actual discharge power and subtracts
Go the maximum that can use the difference of discharge power.
7. the method according to claim 3 or 5, which is characterized in that after the driving power for reducing motor, the side
Method further include:
According to the driving power of motor after reduction power, maximum allowable driving torque is calculated；
According to the maximum allowable driving torque, the driving torque of limiting motor, to limit the actual discharge power of the vehicle.
8. method according to any one of claims 1 to 5, which is characterized in that the reality judged whether to the vehicle
After border discharge power is limited, the method also includes:
Determine be not required to limit the actual discharge power of the vehicle, and it is described can with discharge power be less than the maximum
In the case where can be with discharge power, increase the available discharge power of the vehicle, wherein the available electric discharge after the vehicle increase
Power, which is no more than the maximum, can use discharge power.
9. a kind of power control device of vehicle characterized by comprising
Module is obtained, for obtaining the current actual discharge power of vehicle and current available discharge power；
Judgment module, for judging whether to described according to the actual discharge power and the size with discharge power
The actual discharge power of vehicle is limited；
Power control module is used for if so, to the actual discharge power and discharge power and/or the vehicle
Maximum can be compared with discharge power, and according to comparison result, reduce available discharge power or the reduction of the vehicle
The driving power of motor.
10. device according to claim 9, which is characterized in that the judgment module described can use electric discharge function for judging
Whether the difference that rate subtracts the actual discharge power is less than preset threshold；
Wherein, in the case where the difference that can subtract the actual discharge power with discharge power is less than preset threshold, sentence
It is fixed that the actual discharge power of the vehicle is limited.
11. device according to claim 9, which is characterized in that the power control module includes:
First comparing unit, for that can be compared with discharge power to the actual discharge power with the maximum of the vehicle；
First power control unit can use the feelings of discharge power for being less than or equal to the maximum in the actual discharge power
Under condition, the available discharge power of the vehicle is reduced；
Second power control unit is used in the case where the actual discharge power, which is greater than the maximum, to use discharge power,
Reduce the driving power of motor.
12. device according to claim 9, which is characterized in that the power control module includes:
Second comparing unit, for that can be compared with discharge power to the actual discharge power with described；
Third power control unit, for being less than or equal to described the case where can using discharge power in the actual discharge power
Under, the available discharge power of the vehicle is reduced into the first performance number；
4th power control unit, in the case where being used to that discharge power can be used greater than described in the actual discharge power, by institute
The available discharge power for stating vehicle reduces the second performance number, wherein second performance number is greater than first performance number.
13. device according to claim 9, which is characterized in that the power control module includes:
Third comparing unit, for the actual discharge power to can be used with described with the maximum of discharge power and the vehicle
Discharge power is compared；
5th power control unit, for being less than or equal to described the case where can using discharge power in the actual discharge power
Under, the available discharge power of the vehicle is reduced into third performance number；
6th power control unit for that can use discharge power greater than described in the actual discharge power, and is less than or equal to
In the case that the maximum can be with discharge power, the available discharge power of the vehicle is reduced into the 4th performance number, wherein described
4th performance number is greater than the third performance number；
7th power control unit is used in the case where the actual discharge power, which is greater than the maximum, to use discharge power,
Reduce the driving power of motor.
14. device according to claim 11 or 13, which is characterized in that the power control module is used in the reality
In the case that discharge power can be with discharge power greater than the maximum, the driving power of motor is reduced into the 5th performance number, wherein
5th performance number, which subtracts the maximum equal to the actual discharge power, can use the difference of discharge power.
15. device according to claim 11 or 13, which is characterized in that the power control module further include:
Computing unit calculates maximum allowable driving torque for the driving power according to motor after reduction power；
Limiting unit, for according to the maximum allowable driving torque, the driving torque of limiting motor, to limit the vehicle
Actual discharge power.
16. the device according to any one of claim 9 to 13, which is characterized in that described device further include:
Recovery module, for determining to be not required to limit the actual discharge power of the vehicle, and the electric discharge function
In the case that rate can be with discharge power less than the maximum, increase the available discharge power of the vehicle, wherein the vehicle increases
Available discharge power after big, which is no more than the maximum, can use discharge power.
17. a kind of vehicle, which is characterized in that the power control device including vehicle described in any one of claim 9 to 16.
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