CN109849678A - A kind of electric car regenerative braking safety control - Google Patents
A kind of electric car regenerative braking safety control Download PDFInfo
- Publication number
- CN109849678A CN109849678A CN201910075574.8A CN201910075574A CN109849678A CN 109849678 A CN109849678 A CN 109849678A CN 201910075574 A CN201910075574 A CN 201910075574A CN 109849678 A CN109849678 A CN 109849678A
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- Prior art keywords
- regenerative braking
- electric car
- braking safety
- module
- safety control
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
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- Electric Propulsion And Braking For Vehicles (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a kind of electric car regenerative braking safety controls, including rectification module to obtain direct current signal for driving motor feed three-phase alternating current to be carried out rectification processing；Detection module judges whether driving motor is in feed condition for detecting to direct current signal；10G CPU Control Unit for receiving the detection signal of detection module input, and exports control signal；Power consumption module, receives the control signal of 10G CPU Control Unit, and consumes feed electric energy.Present invention can ensure that vehicle feeds braking function in long descending section, using driving motor, mitigate the load of braking system, guarantees the driving safety of vehicle, and extra electric quantity consumption can be maintained busbar voltage in safe range.
Description
Technical field
The invention belongs to electric vehicle engineering field, more particularly to a kind of electric car regenerative braking is controlled safely
Device processed.
Background technique
When long descending section is run, speed can be getting faster vehicle due to the effect of inertia, and need to touch on the brake deceleration, such as
Fruit conventional truck, touch on the brake traveling for a long time, can cause brake failure because brake strip temperature increases, can draw when serious
Send out major accident；In pure electric automobile, the feed of driving motor can use to play certain braking action, but when dynamic
When power battery can not absorb driving motor extra feed electric energy, power battery can be damaged instead, influences its service life, seriously
When will lead to power battery and overcharge；Part pure electric automobile is by VCU or MCU program setting at present, when power battery monomer electricity
It is pressed onto up to after certain value, VCU sends commands to MCU and stops feed, can protect power battery in this way, but without utilizing driving electricity
Machine presents braking function, while this mode does not mitigate the load of braking system.
It needs to touch on the brake for a long time after closing driving motor braking and sliding feeding function in long descending section, and compares
It steps on heavier under feed braking, keeps the laminating degree of brake strip tighter, fever and abrasion are more serious, still remain brake and lose
Spirit and security risk.
Therefore, how a kind of electric car regenerative braking safety control is provided becomes those skilled in the art and need
It solves the problems, such as.
Summary of the invention
In view of this, the present invention provides a kind of electric car regenerative braking safety controls, it is ensured that vehicle exists
Long descending section feeds braking function using driving motor, mitigates the load of braking system, guarantee the driving safety of vehicle, and
Extra electric quantity consumption can be maintained busbar voltage in safe range.
To achieve the goals above, the present invention adopts the following technical scheme:
A kind of electric car regenerative braking safety control, comprising:
Rectification module obtains direct current signal for driving motor feed three-phase alternating current to be carried out rectification processing；
Detection module judges whether driving motor is in feed condition for detecting to direct current signal；
10G CPU Control Unit for receiving the detection signal of detection module input, and exports control signal；
Power consumption module, receives the control signal of 10G CPU Control Unit, and consumes feed electric energy.
Preferably, the 10G CPU Control Unit is connected with battery management system by CAN, and the battery management system is for examining
Survey the busbar voltage of power battery.Battery management system detects that the busbar voltage of power battery is increased to the second level and determines voltage
When, signal is delivered to 10G CPU Control Unit, 10G CPU Control Unit controls the work of power consumption module to consume feed electric energy.
Preferably, the 10G CPU Control Unit is connected by CAN with electric machine controller and entire car controller.When power battery
When busbar voltage is increased to second level judgement voltage, motor control is given in the CAN order that 10G CPU Control Unit sends request reduction feed current
Device and entire car controller processed.
Preferably, the electric machine controller includes IGBT, and described one end IGBT is connected with the power battery, and the other end is logical
Resistance R1 is crossed to be connected with driving motor.The setting of IGBT reduces the power of electric machine controller, improves the spirit of electric machine controller
Sensitivity, and pressure drop is low, is conducive to the service life for improving electric machine controller.
Preferably, the anode of the power consumption module is connect with the anode of the power battery, the cathode of the power consumption module
It is connect with the cathode of the power battery.
Preferably, the power consumption module includes resistance R, diode V and switching tube VT, the resistance R and the diode V
After parallel connection, one end is connected with the cathode of the power battery, and the other end is connected with the cathode of the switching tube VT, the switching tube
The anode of VT is connected with the anode of the power battery.When the busbar voltage of power battery, which is increased to the second level, determines voltage,
Switching tube VT conducting, by resistance R by extra feed power consumption.
Preferably, be also connected in turn between the driving motor and the rectifier first filter, PFC boost module,
Resonant switch.By first filter, PFC boost module, resonant switch and rectifier, the friendship that can will be flowed out from driving motor
Galvanic electricity circulation turns to DC current, and can give power battery charging.
Preferably, second filter is connected between the rectifier and the detection module.The interference of clutter is avoided, is protected
The accuracy of detection module detection is demonstrate,proved.
It preferably, further include accessory power supply, the accessory power supply is 10G CPU Control Unit power supply.Can be by accessory power supply
10G CPU Control Unit provides electric energy, guarantees that 10G CPU Control Unit works normally.
The beneficial effects of the present invention are:
Present invention can ensure that vehicle feeds braking function in long descending section, using driving motor, mitigate braking system
Load, guarantee the driving safety of vehicle, and extra electric quantity consumption can be maintained busbar voltage in safe range；CPU
Control panel passes through CAN in real time and communicates with entire car controller and electric machine controller, in time leads to the feed electric energy that driving motor generates
It crosses power consumption module and absorbs consumption.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 attached drawing is structural block diagram of the invention.
Fig. 2 attached drawing is circuit diagram of the invention.
Fig. 3 attached drawing is the circuit diagram of rectifier.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Attached drawing 1-3 is please referred to, the present invention provides a kind of electric car regenerative braking safety controls, comprising:
Rectification module obtains direct current signal for driving motor feed three-phase alternating current to be carried out rectification processing；
Detection module judges whether driving motor is in feed condition for detecting to direct current signal；
10G CPU Control Unit for receiving the detection signal of detection module input, and exports control signal；
Power consumption module, receives the control signal of 10G CPU Control Unit, and consumes feed electric energy.
In another embodiment, 10G CPU Control Unit is connected with battery management system by CAN, and battery management system is used for
Detect the busbar voltage of power battery.Battery management system detects that the busbar voltage of power battery is increased to the second level and determines electricity
When pressure, signal is delivered to 10G CPU Control Unit, 10G CPU Control Unit controls the work of power consumption module to consume feed electric energy.
In another embodiment, 10G CPU Control Unit is connected by CAN with electric machine controller and entire car controller.Work as power
The busbar voltage of battery be increased to the second level determine voltage when, 10G CPU Control Unit send request reduce feed current CAN order to
Electric machine controller and entire car controller.
In another embodiment, electric machine controller includes IGBT, and the one end IGBT is connected with power battery, and the other end passes through
Resistance R1 is connected with driving motor.The setting of IGBT reduces the power of electric machine controller, improves the sensitive of electric machine controller
Degree, and pressure drop is low, is conducive to the service life for improving electric machine controller.
In another embodiment, power consumption module anode with power battery anode connect, the cathode of power consumption module and
The cathode of power battery connects.
In another embodiment, power consumption module includes resistance R, diode V and switching tube VT, and resistance R and diode V are simultaneously
After connection, one end is connected with the cathode of power battery, and the other end is connected with the cathode of switching tube VT, the anode and power of switching tube VT
The anode of battery is connected.When the busbar voltage of power battery, which is increased to the second level, determines voltage, switching tube VT conducting passes through electricity
R is hindered by extra feed power consumption.
In another embodiment, first filter, PFC boost mould are also connected between driving motor and rectifier in turn
Block, resonant switch.By first filter, PFC boost module, resonant switch and rectifier, can will be flowed out from driving motor
Alternating current be converted into DC current, and power battery charging can be given.
In another embodiment, second filter is connected between rectifier and detection module.The interference of clutter is avoided,
It ensure that the accuracy of detection module detection.
It in another embodiment, further include accessory power supply, accessory power supply is 10G CPU Control Unit power supply.Pass through accessory power supply
Electric energy can be provided for 10G CPU Control Unit, guarantee that 10G CPU Control Unit works normally.
For vehicle in braking, driving motor is in feed condition, and electric current is flowed out from driving motor at this time, by U/V/W tri-
Phase line is to rectification module, and the rectified module converter of alternating current is DC current, and DC current is by the processing such as resonator, filter
After transmit a signal to detection module and battery management system, now feed current direction is set to negative, if detecting, electric current is negative,
Then it is believed that braking feed at this time, according to the communication with battery management system, decide whether to beat according to power battery state
Switching tube VT is opened, if power battery is in full power state, opens switching tube VT, electric current is consumed by resistance R, reaches safeguard protection
Effect.
Present invention can ensure that vehicle feeds braking function in long descending section, using driving motor, mitigate braking system
Load, guarantee the driving safety of vehicle, and extra electric quantity consumption can be maintained busbar voltage in safe range；CPU
Control panel passes through CAN in real time and communicates with entire car controller and electric machine controller, in time leads to the feed electric energy that driving motor generates
It crosses power consumption module and absorbs consumption.
Vehicle will cause in long descending section once power battery can not absorb driving motor braking, slide feed electric energy
Busbar voltage further rises, when busbar voltage, which is increased to the second level, determines voltage, by reading CAN communication data and electricity
Pressure determines that 10G CPU Control Unit controls the conducting of power consumption module, by extra electric quantity consumption, while sending the CAN that request reduces feed current
It orders to entire car controller and electric machine controller, so that power battery be protected to be driven motor feed impact, also avoids simultaneously
Power battery overcharge causes the problem of damage.
The present invention when driving motor is constantly in feed condition, protects power in the full electricity of power cell of vehicle and long descending
Battery is driven the impact of motor feed and overcharge causes to damage；Vehicle is in emergency braking condition, driving motor feed current
And voltage is big, weakens voltge surge and absorbs electric current；In addition, the present invention passes through 10G CPU Control Unit and entire car controller and motor control
Device real time communication processed, at the same by setting busbar voltage threshold values come start-up resistor disappear braking, slide the extra electric energy of consumption feed.
To power battery protection problem when the present invention solves driving motor feedback braking；This invention also solves long descendings
Section feed brakes the problem that cooperates with braking system；In addition, the present invention is due to used that part is common, low-cost, institute
There is the features such as price is low, small in size, easy for installation, portable good with the present invention.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.For device disclosed in embodiment
For, since it is corresponded to the methods disclosed in the examples, so being described relatively simple, related place is said referring to method part
It is bright.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (9)
1. a kind of electric car regenerative braking safety control characterized by comprising
Rectification module obtains direct current signal for driving motor feed three-phase alternating current to be carried out rectification processing；
Detection module judges whether driving motor is in feed condition for detecting to direct current signal；
10G CPU Control Unit for receiving the detection signal of detection module input, and exports control signal；
Power consumption module, receives the control signal of 10G CPU Control Unit, and consumes feed electric energy.
2. a kind of electric car regenerative braking safety control according to claim 2, which is characterized in that the CPU
Control panel is connected with battery management system by CAN, and the battery management system is used to detect the busbar voltage of power battery.
3. a kind of electric car regenerative braking safety control according to claim 1 or 2, which is characterized in that described
10G CPU Control Unit is connected by CAN with electric machine controller and entire car controller.
4. a kind of electric car regenerative braking safety control according to claim 3, which is characterized in that the motor
Controller includes IGBT, and described one end IGBT is connected with the power battery, and the other end is connected by resistance R1 with driving motor.
5. a kind of electric car regenerative braking safety control according to claim 1, which is characterized in that the power consumption
The anode of module is connect with the anode of the power battery, and the cathode of the power consumption module and the cathode of the power battery connect
It connects.
6. a kind of electric car regenerative braking safety control according to claim 5, which is characterized in that the power consumption
Module includes resistance R, diode V and switching tube VT, after the resistance R is in parallel with the diode V, one end and the power electric
The cathode in pond is connected, and the other end is connected with the cathode of the switching tube VT, anode and the power battery of the switching tube VT
Anode be connected.
7. a kind of electric car regenerative braking safety control according to claim 1, which is characterized in that the driving
Also it is connected with first filter, PFC boost module, resonant switch between motor and the rectifier in turn.
8. a kind of electric car regenerative braking safety control according to claim 1 or claim 7, which is characterized in that described
Second filter is connected between rectifier and the detection module.
9. a kind of electric car regenerative braking safety control according to claim 1, which is characterized in that further include auxiliary
Power supply is helped, the accessory power supply is 10G CPU Control Unit power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910075574.8A CN109849678A (en) | 2019-01-25 | 2019-01-25 | A kind of electric car regenerative braking safety control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910075574.8A CN109849678A (en) | 2019-01-25 | 2019-01-25 | A kind of electric car regenerative braking safety control |
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| CN109849678A true CN109849678A (en) | 2019-06-07 |
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| CN201910075574.8A Pending CN109849678A (en) | 2019-01-25 | 2019-01-25 | A kind of electric car regenerative braking safety control |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113479071A (en) * | 2021-07-09 | 2021-10-08 | 华人运通(江苏)技术有限公司 | Electric vehicle slope sliding prevention control system and method |
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| CN113479071A (en) * | 2021-07-09 | 2021-10-08 | 华人运通(江苏)技术有限公司 | Electric vehicle slope sliding prevention control system and method |
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