CN105857088A - Electric vehicle and method and system for recycling its braking energy - Google Patents
Electric vehicle and method and system for recycling its braking energy Download PDFInfo
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- CN105857088A CN105857088A CN201610471947.XA CN201610471947A CN105857088A CN 105857088 A CN105857088 A CN 105857088A CN 201610471947 A CN201610471947 A CN 201610471947A CN 105857088 A CN105857088 A CN 105857088A
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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
- B60L7/00—Electrodynamic brake systems for vehicles in general
- B60L7/10—Dynamic electric regenerative braking
- B60L7/18—Controlling the braking effect
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Abstract
The invention discloses an electric vehicle and method and system for recycling its braking energy. The method comprises the following steps: when the electric vehicle is braked, acquiring a brake pedal opening signal of the electric vehicle and a current speed of the electric vehicle; acquiring a first recycle torque value of the electric vehicle according to the brake pedal opening signal and the current speed; acquiring a current maximum recyclable torque value of the electric vehicle, and using a less one of the first recycle torque value and the current maximum recyclable torque value as a second recycle torque valve; and recycling braking energy of the electric vehicle according to the second recycle torque value. By acquiring the recycle torque value of the electric vehicle according to the brake pedal opening signal and the current vehicle speed, it is possible to improve driving comfort and improve vehicular economy, braking performance, safety and the like.
Description
Technical field
The present invention relates to automobile technical field, particularly to a kind of electric automobile and method for recovering brake energy, system.
Background technology
Generally, during electric vehicle brake, braking energy can be reclaimed.
In correlation technique, use the Brake energy recovery strategy shown in Fig. 1 that the braking energy of electric automobile is reclaimed, but
It is that this strategy has the disadvantage in that
If 1 degree of depth feedback torque value demarcate excessive, then vehicle in run at a low speed under operating mode, driver expects slightly to slow down
When gently stepping on brake pedal, motor, by braking torque bigger for response, now easily causes vehicle deceleration relatively big, drives sensation
Irregularity, is unfavorable for the comfortableness of vehicle；
If 2 degree of depth feedback torque values are demarcated too small, then vehicle is under high speed driving cycle, and vehicle needs brake hard,
Easily cause brake force not enough, and energy recovery rate is the highest, is unfavorable for braking and the economy of vehicle；
3, different due to the Brake energy recovery torque curve of different gears, therefore the vehicle braking ability when different gear is not
With (E shelves braking ability is more preferable).Likely driver is after a certain gear of long-time use is driven, and is accustomed to its brake feel,
And when it is switched to another gear, the actual braking ability of vehicle and driver expect deviation, always bring potential safety hazard.
Summary of the invention
It is contemplated that one of technical problem solved the most to a certain extent in correlation technique.
To this end, the first of the present invention purpose is to propose the method for recovering brake energy of a kind of electric automobile, the method according to
Brake pedal opening amount signal and current vehicle speed obtain the recovery torque value of electric automobile, are possible not only to improve driver comfort, and
And the economy of vehicle, braking and safety etc. can be improved.
Second object of the present invention is to propose the brake energy recovering system of a kind of electric automobile.
Third object of the present invention is to propose a kind of electric automobile.
For achieving the above object, first aspect present invention embodiment proposes the method for recovering brake energy of a kind of electric automobile,
Comprise the following steps: when described electric automobile is in on-position, obtain the brake pedal opening amount signal of described electric automobile,
And obtain the current vehicle speed of described electric automobile；Described electricity is obtained according to described brake pedal opening amount signal and described current vehicle speed
First recovery torque value of electrical automobile；Obtain the current maximum allowable recovery torque value of described electric automobile, and by described first
Reclaim the second recovery moment of torsion as described electric automobile of the smaller value in torque value and described current maximum allowable recovery torque value
Value；And according to described second recovery torque value, described electric automobile is braked energy regenerating.
The method for recovering brake energy of electric automobile according to embodiments of the present invention, when electric automobile is in on-position, obtains
The brake pedal opening amount signal of power taking electrical automobile, and obtain the current vehicle speed of electric automobile, and believe according to brake pedal aperture
Number and current vehicle speed obtain electric automobile first recovery torque value, then, obtain electric automobile current maximum allowable recovery
Torque value, and reclaim the smaller value in torque value and current maximum allowable recovery torque value using first as the second of electric automobile
Reclaim torque value, finally, reclaim torque value according to second and electric automobile is braked energy regenerating, thus be possible not only to change
Kind driver comfort, and the economy of vehicle, braking and safety etc. can be improved.
According to one embodiment of present invention, lookup table mode is used according to described brake pedal opening amount signal and described current vehicle speed
Obtain described first and reclaim torque value.
According to one embodiment of present invention, the current maximum allowable recovery torque value of the described electric automobile of described acquisition, including:
Obtain the current maximum allowable charge power of the electrokinetic cell of described electric automobile, and obtain working as of motor in described electric automobile
Front rotating speed；Current rotating speed according to described current maximum allowable charge power and described motor calculates described the most maximum allowable time
Receive torque value.
According to one embodiment of present invention, the method for recovering brake energy of above-mentioned electric automobile, also include: judge whether
Receive the unlatching signal of the ABS (Antilock Brake System, anti-blocking brake system) of described electric automobile；As
Fruit judges to receive the unlatching signal of described ABS, then reclaim torque value by described second and set to 0.
For achieving the above object, the brake energy recovering system of a kind of electric automobile that second aspect present invention embodiment proposes,
Including: brake pedal aperture acquisition module, for obtaining the brake pedal opening amount signal of described electric automobile；Speed obtains mould
Block, for obtaining the current vehicle speed of described electric automobile；Control module, described control module is opened with described brake pedal respectively
Degree acquisition module is connected with described speed acquisition module, for when described electric automobile is in on-position, according to described system
Dynamic pedal opening signal and described current vehicle speed obtain the first recovery torque value of described electric automobile, and by described electric automobile
Current maximum allowable recovery torque value, and obtain described first and reclaim torque value and described current maximum allowable recovery moment of torsion
Smaller value in value is as the second recovery torque value of described electric automobile, and reclaims torque value to described electricity according to described second
Electrical automobile is braked energy regenerating.
The brake energy recovering system of electric automobile according to embodiments of the present invention, when electric automobile is in on-position, system
Dynamic pedal aperture acquisition module obtains the brake pedal opening amount signal of electric automobile, and speed acquisition module obtains working as of electric automobile
Front speed, control module obtains the first recovery torque value of electric automobile according to brake pedal opening amount signal and current vehicle speed, and
Obtain the current maximum allowable recovery torque value of electric automobile, and reclaim torque value and current maximum allowable recovery torsion by first
Smaller value in square value, as the second recovery torque value of electric automobile, finally, reclaims torque value to electric automobile according to second
It is braked energy regenerating, thus is possible not only to improve driver comfort, and the economy of vehicle, braking can be improved
And safety etc..
According to one embodiment of present invention, described control module is according to described brake pedal opening amount signal and described current vehicle speed
Use lookup table mode to obtain described first and reclaim torque value.
According to one embodiment of present invention, the brake energy recovering system of above-mentioned electric automobile, also include: power obtains
Module, for obtaining the current maximum allowable charge power of the electrokinetic cell of described electric automobile；Rotating speed acquisition module, is used for
Obtaining the current rotating speed of motor in described electric automobile, wherein, described control module is according to described current maximum allowable charging merit
The current rotating speed of rate and described motor calculates described current maximum allowable recovery torque value.
According to one embodiment of present invention, described control module, it is additionally operable to: judge whether to receive described electric automobile
The unlatching signal of anti-blocking brake system ABS, and reclaim described second when judging the unlatching signal receiving described ABS
Torque value sets to 0.
Additionally, embodiments of the invention also proposed a kind of electric automobile, it includes that the braking energy of above-mentioned electric automobile returns
Receipts system.
The electric automobile of the embodiment of the present invention, by the brake energy recovering system of above-mentioned electric automobile, it is possible to according to braking
Pedal opening signal and current vehicle speed obtain the recovery torque value of electric automobile, thus are possible not only to improve driver comfort, and
And the economy of vehicle, braking and safety etc. can be improved.
Accompanying drawing explanation
Fig. 1 is the Brake energy recovery strategy of electric automobile in correlation technique；
Fig. 2 is the flow chart of the method for recovering brake energy of electric automobile according to embodiments of the present invention；
Fig. 3 is the flow chart of the method for recovering brake energy of electric automobile according to an embodiment of the invention；And
Fig. 4 is the block diagram of the brake energy recovering system of electric automobile according to an embodiment of the invention.
Detailed description of the invention
Embodiments of the invention are described below in detail, and the example of described embodiment is shown in the drawings, the most identical
Or similar label represents same or similar element or has the element of same or like function.Retouch below with reference to accompanying drawing
The embodiment stated is exemplary, it is intended to is used for explaining the present invention, and is not considered as limiting the invention.
Below with reference to the accompanying drawings electric automobile and method for recovering brake energy, the system of the embodiment of the present invention are described.
Fig. 2 is the flow chart of the method for recovering brake energy of electric automobile according to embodiments of the present invention.As in figure 2 it is shown, should
The method for recovering brake energy of electric automobile comprises the following steps:
S1, when electric automobile is in on-position, obtains the brake pedal opening amount signal of electric automobile, and obtains electronic vapour
The current vehicle speed of car.
Specifically, a jaw opening sensor, the exportable current brake pedal of this jaw opening sensor can be installed at brake pedal additional
Opening amount signal.Under vehicle running state, Real-time Collection brake pedal opening amount signal, if brake pedal opening amount signal is more than
0, then may determine that electric automobile is currently at on-position.When electric automobile is in on-position, record brake pedal is opened
Degree signal, and obtain the current vehicle speed of electric automobile.
S2, obtains the first recovery torque value of electric automobile according to brake pedal opening amount signal and current vehicle speed.
In one embodiment of the invention, lookup table mode is used to obtain first according to brake pedal opening amount signal and current vehicle speed
Reclaim torque value.
Specifically, can in advance brake pedal opening amount signal, speed and recovery torque value be stored in table form
In electric automobile, the parameter list of different automobile type configuration is different.When electric automobile is in on-position, the braking that will obtain
Pedal opening signal and current vehicle speed are tabled look-up as input parameter, to obtain the first recovery torque value of electric automobile.
S3, obtains the current maximum allowable recovery torque value of electric automobile, and reclaims torque value and the most maximum allowable by first
Reclaim the second recovery torque value as electric automobile of the smaller value in torque value.
It is understood that for ensureing that brake feel is expected consistent with driver, usual brake force and the throw line of brake pedal
Property corresponding, i.e. the stroke of brake pedal is the biggest, and the braking torque of motor is the biggest.Further, since under high-speed working condition, human body pair
The sensitivity of acceleration change is relatively low, and therefore speed is the highest, and the braking torque of motor is the biggest.So, general trend is: system
Dynamic pedal aperture is the biggest, reclaims torque value the biggest；Speed is the biggest, reclaims torque value the biggest.Further, torque value is reclaimed
Span is 0～the current maximum allowable recovery torque value of this car.Therefore, also need to obtain the most maximum allowable of electric automobile
Reclaim torque value, and reclaim the smaller value in torque value and current maximum allowable recovery torque value using first as electric automobile
Second reclaims torque value.
According to one embodiment of present invention, obtain the current maximum allowable recovery torque value of electric automobile, including: obtain electricity
The current maximum allowable charge power of the electrokinetic cell of electrical automobile, and obtain the current rotating speed of motor in electric automobile；According to working as
The current rotating speed of front maximum allowable charge power and motor calculates current maximum allowable recovery torque value, wherein, current maximum fair
Permitted to reclaim the current rotating speed of torque value=current maximum allowable charge power * 9550/ motor.
S4, reclaims torque value according to second and electric automobile is braked energy regenerating.
Specifically, the second recovery torque value obtained is sent to electric machine controller, sends generating state instruction to electricity simultaneously
Machine controller, so that electric machine controller reclaims torque value control motor according to second is in generating state, it is achieved electric automobile
Brake energy recovery.
In actual applications, electric automobile generally has anti-blocking brake system ABS, and ABS is when automobile brake, automatically
The size of control brake brake force, so that wheel is not by locking, is in the sliding state of limit rolling, it is ensured that wheel is attached with ground
Put forth effort at maximum.
Therefore, in one embodiment of the invention, the method for recovering brake energy of above-mentioned electric automobile also includes: judge
Whether receive the unlatching signal of the ABS of electric automobile；If it is determined that receive the unlatching signal of ABS, then reclaim second
Torque value sets to 0.
It is to say, when ABS is not actuated, that reclaims in torque value and current maximum allowable recovery torque value by first is less
It is worth the second recovery torque value as electric automobile, electric automobile is braked energy regenerating；When ABS starts, then
Two recovery torque values are directly 0, unaffected to ensure the performance of ABS.
In order to make those skilled in the art more clearly understand, the present invention, Fig. 3 are the electronic vapour according to one concrete example of the present invention
The flow chart of the method for recovering brake energy of car.
As it is shown on figure 3, in vehicle travel process, Real-time Collection brake pedal opening amount signal, current vehicle speed, the startup of ABS
Signal, the current rotating speed of motor, the current maximum allowable charge power etc. of electrokinetic cell, and judge brake pedal opening amount signal
Whether more than 0.If it is, be judged as damped condition, now pass through to look into according to brake pedal opening amount signal and current vehicle speed
Table obtains the first recovery torque value.Then, according to current rotating speed and the current maximum allowable charge power of electrokinetic cell of motor
Calculate the current maximum recovery torque value that allows, and take the first recovery torque value and the current smaller value allowing maximum recovery torque value
Torque value is reclaimed as second.Finally, it is judged that whether ABS starts, if ABS starts, then the second recovery torque value is 0,
The most it is not braked energy regenerating；If ABS is not actuated, then sends generating state instruction to electric machine controller, send simultaneously
Second reclaims torque value, to realize motor braking energy regenerating.Thus brake pedal aperture and current vehicle speed are combined with reality
Time regulation reclaim torque value, it is ensured that under vehicle low speed damped condition smooth-going sensation, the economy under high speed damped condition and system
Dynamic property, and the safety etc. of vehicle.
In sum, the method for recovering brake energy of electric automobile according to embodiments of the present invention, it is in braking at electric automobile
During state, the brake pedal opening amount signal of acquisition electric automobile, and obtain the current vehicle speed of electric automobile, and according to braking
Pedal opening signal and current vehicle speed obtain the first recovery torque value of electric automobile, then, obtain electric automobile current
The big recovery torque value that allows, and reclaim the smaller value in torque value and current maximum allowable recovery torque value using first as electronic
Second recovery torque value of automobile, finally, reclaims torque value according to second and electric automobile is braked energy regenerating, thus
It is possible not only to improve driver comfort, and the economy of vehicle, braking and safety etc. can be improved.
Fig. 4 is the block diagram of the brake energy recovering system of electric automobile according to an embodiment of the invention.As shown in Figure 4,
The brake energy recovering system of this electric automobile includes: brake pedal aperture acquisition module 10, speed acquisition module 20 and control
Molding block 30.
Wherein, brake pedal aperture acquisition module 10 is for obtaining the brake pedal opening amount signal of electric automobile.Speed obtains mould
Block 20 is for obtaining the current vehicle speed of electric automobile.Control module 30 respectively with brake pedal aperture acquisition module 10 and speed
Acquisition module 20 is connected, and for when electric automobile is in on-position, obtains according to brake pedal opening amount signal and current vehicle speed
First recovery torque value of power taking electrical automobile, and by the current maximum allowable recovery torque value of electric automobile, and obtain first
Reclaim the second recovery torque value as electric automobile of the smaller value in torque value and current maximum allowable recovery torque value, and root
Reclaim torque value according to second and electric automobile is braked energy regenerating.
Specifically, brake pedal aperture acquisition module 10 can be jaw opening sensor, is installed at brake pedal, and this aperture passes
Sensor detects brake pedal aperture in real time, and exports brake pedal opening amount signal.Under vehicle running state, control module 30
Real-time Collection brake pedal opening amount signal, if brake pedal opening amount signal is more than 0, then may determine that electric automobile is currently located
In on-position.When electric automobile is in on-position, control module 30 record braking pedal opening signal, and pass through car
Speed acquisition module 20 obtains the current vehicle speed of electric automobile.Then, control module 30 according to brake pedal opening amount signal and is worked as
Front speed obtains the first recovery torque value of electric automobile.
In one embodiment of the invention, control module 30 uses, according to brake pedal opening amount signal and current vehicle speed, the side of tabling look-up
Formula obtains the first recovery torque value.
Specifically, can in advance brake pedal opening amount signal, speed and recovery torque value be stored in table form
In control module 30, the parameter list of different automobile type configuration is different.When electric automobile is in on-position, control module
Brake pedal opening amount signal and the current vehicle speed of acquisition are tabled look-up, to obtain the first of electric automobile by 30 as input parameter
Reclaim torque value.
It is understood that for ensureing that brake feel is expected consistent with driver, usual brake force and the throw line of brake pedal
Property corresponding, i.e. the stroke of brake pedal is the biggest, and the braking torque of motor is the biggest.Further, since under high-speed working condition, human body pair
The sensitivity of acceleration change is relatively low, and therefore speed is the highest, and the braking torque of motor is the biggest.So, general trend is: system
Dynamic pedal aperture is the biggest, reclaims torque value the biggest；Speed is the biggest, reclaims torque value the biggest.Further, torque value is reclaimed
Span is 0～the current maximum allowable recovery torque value of this car.Therefore, also need to obtain the most maximum allowable of electric automobile
Reclaim torque value, and reclaim the smaller value in torque value and current maximum allowable recovery torque value using first as electric automobile
Second reclaims torque value.
I.e., in one embodiment of the invention, the brake energy recovering system of above-mentioned electric automobile, also include: power
Acquisition module 40 and rotating speed acquisition module 50, wherein, power acquisition module 40 is for obtaining the electrokinetic cell of electric automobile
Current maximum allowable charge power；Rotating speed acquisition module 50 is for obtaining the current rotating speed of motor, control module in electric automobile
30 calculate current maximum allowable recovery torque value according to the current rotating speed of current maximum allowable charge power and motor, wherein, when
The current rotating speed of front maximum allowable recovery torque value=current maximum allowable charge power * 9550/ motor.
Finally, the second recovery torque value obtained is sent to electric machine controller by control module 30, sends generating state simultaneously and refers to
Order is to electric machine controller, so that electric machine controller reclaims torque value control motor according to second is in generating state, it is achieved electronic
The Brake energy recovery of automobile.
In actual applications, electric automobile generally has anti-blocking brake system ABS, and ABS is when automobile brake, automatically
The size of control brake brake force, so that wheel is not by locking, is in the sliding state of limit rolling, it is ensured that wheel is attached with ground
Put forth effort at maximum.
Therefore, in one embodiment of the invention, control module 30 is additionally operable to judge whether to receive the antilock of electric automobile
The unlatching signal of dead brakes ABS, and when judging the unlatching signal receiving ABS, the second recovery torque value is set to 0.
It is to say, when ABS is not actuated, that reclaims in torque value and current maximum allowable recovery torque value by first is less
It is worth the second recovery torque value as electric automobile, electric automobile is braked energy regenerating；When ABS starts, then
Two recovery torque values are directly 0, unaffected to ensure the performance of ABS.Specifically it is referred to shown in Fig. 3, the most no longer
Describe in detail.
The brake energy recovering system of electric automobile according to embodiments of the present invention, when electric automobile is in on-position, system
Dynamic pedal aperture acquisition module obtains the brake pedal opening amount signal of electric automobile, and speed acquisition module obtains working as of electric automobile
Front speed, control module obtains the first recovery torque value of electric automobile according to brake pedal opening amount signal and current vehicle speed, and
Obtain the current maximum allowable recovery torque value of electric automobile, and reclaim torque value and current maximum allowable recovery torsion by first
Smaller value in square value, as the second recovery torque value of electric automobile, finally, reclaims torque value to electric automobile according to second
It is braked energy regenerating, thus is possible not only to improve driver comfort, and the economy of vehicle, braking can be improved
And safety etc..
Additionally, embodiments of the invention also proposed a kind of electric automobile, it includes that the braking energy of above-mentioned electric automobile returns
Receipts system.
The electric automobile of the embodiment of the present invention, by the brake energy recovering system of above-mentioned electric automobile, it is possible to according to braking
Pedal opening signal and current vehicle speed obtain the recovery torque value of electric automobile, thus are possible not only to improve driver comfort, and
And the economy of vehicle, braking and safety etc. can be improved.
In describing the invention, it is to be understood that term " first ", " second " are only used for describing purpose, and can not
It is interpreted as instruction or hint relative importance or the implicit quantity indicating indicated technical characteristic.Thus, define " the
One ", the feature of " second " can express or implicitly include at least one this feature.In describing the invention, " multiple "
It is meant that at least two, such as two, three etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, term " install ", " being connected ", " connection ", " fixing "
Should be interpreted broadly Deng term, connect for example, it may be fixing, it is also possible to be to removably connect, or integral；Can be
It is mechanically connected, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, can be two
The connection of individual element internal or the interaction relationship of two elements, unless otherwise clear and definite restriction.Common for this area
For technical staff, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " specifically show
Example " or the description of " some examples " etc. means to combine this embodiment or example describes specific features, structure, material or
Feature is contained at least one embodiment or the example of the present invention.In this manual, the schematic representation to above-mentioned term
Necessarily it is directed to identical embodiment or example.And, the specific features of description, structure, material or feature are permissible
One or more embodiment in office or example combine in an appropriate manner.Additionally, in the case of the most conflicting, ability
The feature of the different embodiments described in this specification or example and different embodiment or example can be entered by the technical staff in territory
Row combines and combination.
Although above it has been shown and described that embodiments of the invention, it is to be understood that above-described embodiment is exemplary,
Being not considered as limiting the invention, those of ordinary skill in the art within the scope of the invention can be to above-described embodiment
It is changed, revises, replaces and modification.
Claims (9)
1. the method for recovering brake energy of an electric automobile, it is characterised in that comprise the following steps:
When described electric automobile is in on-position, obtains the brake pedal opening amount signal of described electric automobile, and obtain institute
State the current vehicle speed of electric automobile；
The first recovery torque value of described electric automobile is obtained according to described brake pedal opening amount signal and described current vehicle speed；
Obtain the current maximum allowable recovery torque value of described electric automobile, and reclaim described first torque value and described currently
Smaller value in maximum allowable recovery torque value is as the second recovery torque value of described electric automobile；And
Reclaim torque value according to described second and described electric automobile is braked energy regenerating.
2. the method for recovering brake energy of electric automobile as claimed in claim 1, it is characterised in that step on according to described braking
Plate opening amount signal and described current vehicle speed use lookup table mode to obtain described first and reclaim torque value.
3. the method for recovering brake energy of electric automobile as claimed in claim 1, it is characterised in that the described electricity of described acquisition
The current maximum allowable recovery torque value of electrical automobile, including:
Obtain the current maximum allowable charge power of the electrokinetic cell of described electric automobile, and obtain motor in described electric automobile
Current rotating speed；
Current rotating speed according to described current maximum allowable charge power and described motor calculates described current maximum allowable recovery and turns round
Square value.
4. the method for recovering brake energy of the electric automobile as according to any one of claim 1-3, it is characterised in that also wrap
Include:
Judge whether to receive the unlatching signal of the anti-blocking brake system ABS of described electric automobile；
If it is determined that receive the unlatching signal of described ABS, then reclaim torque value by described second and set to 0.
5. the brake energy recovering system of an electric automobile, it is characterised in that including:
Brake pedal aperture acquisition module, for obtaining the brake pedal opening amount signal of described electric automobile；
Speed acquisition module, for obtaining the current vehicle speed of described electric automobile；
Control module, described control module is connected with described brake pedal aperture acquisition module and described speed acquisition module respectively,
For when described electric automobile is in on-position, obtain institute according to described brake pedal opening amount signal and described current vehicle speed
State the first recovery torque value of electric automobile, and by the current maximum allowable recovery torque value of described electric automobile, and obtain
Described first reclaims the smaller value in torque value and described current maximum allowable recovery torque value as the second of described electric automobile
Reclaim torque value, and according to described second recovery torque value, described electric automobile is braked energy regenerating.
6. the brake energy recovering system of electric automobile as claimed in claim 5, it is characterised in that described control module root
Use lookup table mode to obtain described first according to described brake pedal opening amount signal and described current vehicle speed and reclaim torque value.
7. the brake energy recovering system of electric automobile as claimed in claim 5, it is characterised in that also include:
Power acquisition module, for obtaining the current maximum allowable charge power of the electrokinetic cell of described electric automobile；
Rotating speed acquisition module, for obtaining the current rotating speed of motor in described electric automobile, wherein,
Described control module according to the current rotating speed of described current maximum allowable charge power and described motor calculate described
Big permission reclaims torque value.
8. the brake energy recovering system of the electric automobile as according to any one of claim 5-7, it is characterised in that described
Control module, is additionally operable to:
Judge whether to receive the unlatching signal of the anti-blocking brake system ABS of described electric automobile, and receive institute in judgement
Reclaim torque value by described second when stating the unlatching signal of ABS to set to 0.
9. an electric automobile, it is characterised in that include the braking of electric automobile as according to any one of claim 5-8
Energy-recuperation system.
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| CN201610471947.XA CN105857088A (en) | 2016-06-24 | 2016-06-24 | Electric vehicle and method and system for recycling its braking energy |
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| CN201610471947.XA CN105857088A (en) | 2016-06-24 | 2016-06-24 | Electric vehicle and method and system for recycling its braking energy |
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