CN112339569A - New energy vehicle braking energy recovery control method - Google Patents
New energy vehicle braking energy recovery control method Download PDFInfo
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- CN112339569A CN112339569A CN202011286134.6A CN202011286134A CN112339569A CN 112339569 A CN112339569 A CN 112339569A CN 202011286134 A CN202011286134 A CN 202011286134A CN 112339569 A CN112339569 A CN 112339569A
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- Prior art keywords
- braking energy
- energy recovery
- braking
- vehicle speed
- vehicle
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
Abstract
The invention discloses a method for recovering and controlling braking energy of a new energy vehicle, which comprises the following steps: when the VCU receives a braking signal, firstly judging whether the ABS is started; if yes, not starting the recovery of the braking energy; if the vehicle speed is less than 30km/h, starting braking energy recovery and controlling the magnitude of the recovered charging current to be I1; if the vehicle speed is more than or equal to 30km/h and less than 60km/h, starting braking energy recovery and controlling the magnitude of the recovered charging current to be I2; if the vehicle speed is more than 60km/h, braking energy recovery is started and the magnitude of the recovered charging current is controlled to be I3. By adopting the technical scheme, the invention adopts the serial braking energy recovery and the step recovery strength to achieve the purposes of shortening the development period and reducing the development cost.
Description
Technical Field
The invention belongs to the technical field of a braking energy recovery system of a new energy commercial vehicle, and particularly relates to a control strategy related to an ABS system. More specifically, the invention relates to a braking energy recovery control method for a new energy vehicle.
Background
The endurance mileage of the new energy vehicle is an important index for evaluating the performance of the new energy vehicle, and when the new energy vehicle is in a sliding working condition and a braking working condition, sliding energy recovery and braking energy recovery are carried out so as to increase the endurance mileage of the whole vehicle. The quality of the recovery strategy directly influences the energy recovery and the development cost of the whole vehicle.
In the prior art, the braking energy recovery of the new energy passenger vehicle mostly adopts a parallel braking energy recovery strategy, namely the energy recovery function is not quitted when the ABS works, and the energy is continuously recovered so as to improve the energy recovery rate. The control strategy requires accurate calibration of the ABS system and the energy recovery system, so as to prevent the situation that the driving wheels are locked to drag and slide due to overlarge braking force and disturbance of normal adjustment of the ABS system caused by the transmission of the anti-drag torque generated by the motor in the power generation mode to the driving wheels because the braking energy recovery function is continuously started during emergency braking.
In the existing system adopting the parallel type energy recovery strategy, an equal proportion braking energy recovery strategy is often adopted, namely a pedal depth sensor is arranged on a braking pedal, and corresponding energy recovery intensity is matched according to the stepping depth of the braking pedal, so that the method is easy to realize and the development cost is relatively low. But the product needs to be accurately calibrated during development, the calibration period is long, and the development cost is high. However, commercial vehicles often require relatively short development periods and relatively low development costs, and the parallel energy recovery strategy is not suitable.
Therefore, designing a braking energy recovery and ABS control strategy suitable for new energy commercial vehicles is an urgent problem to be solved in the technical field.
Disclosure of Invention
The invention provides a method for recovering and controlling the braking energy of a new energy vehicle, and aims to shorten the development period and reduce the development cost.
In order to achieve the purpose, the invention adopts the technical scheme that:
the invention discloses a method for recovering and controlling braking energy of a new energy vehicle, which comprises the following steps:
starting braking;
when the VCU receives a braking signal, firstly judging whether the ABS is started; if yes, not starting the recovery of the braking energy; if not, reading a vehicle speed signal;
if the vehicle speed is less than 30km/h, starting braking energy recovery and controlling the magnitude of the recovered charging current to be I1; if the vehicle speed is more than or equal to 30km/h, continuously reading a vehicle speed signal;
if the vehicle speed is more than or equal to 30km/h and less than 60km/h, starting braking energy recovery and controlling the magnitude of the recovered charging current to be I2;
if the vehicle speed is more than 60km/h, braking energy recovery is started and the magnitude of the recovered charging current is controlled to be I3.
In the process of the control method, as long as the VCU detects that the ABS is started, the braking energy recovery function is rapidly quitted. From the moment the ABS is started, the time from the moment the braking energy recovery function is completely exited is not more than 70 ms.
Said I1＜I2＜I3。
According to the technical scheme, the serial braking energy recovery is adopted, and the step recovery strength is adopted, so that the purposes of shortening the development period and reducing the development cost are achieved.
Drawings
FIG. 1 is a schematic view of a stepped recovery process of braking energy according to the present invention.
Detailed Description
The following detailed description of the embodiments of the present invention will be given in order to provide those skilled in the art with a more complete, accurate and thorough understanding of the inventive concept and technical solutions of the present invention.
Fig. 1 shows a flowchart of a method for controlling braking energy recovery of a new energy vehicle. The invention relates to a new energy commercial vehicle braking energy recovery system and an ABS system related control strategy, belonging to the technical field of vehicle power control.
In order to solve the problems and overcome the defects of the prior art and achieve the purposes of shortening the development period and reducing the development cost, the invention adopts the technical scheme that:
as shown in fig. 1, the braking energy recovery control method for the new energy vehicle of the invention comprises the following steps:
starting braking;
when a VCU (vehicle control unit) receives a braking signal, firstly judging whether ABS (anti-lock braking) is started or not; if yes, not starting the recovery of the braking energy; if not, reading a vehicle speed signal;
if the vehicle speed is less than 30km/h, starting braking energy recovery and controlling the magnitude of the recovered charging current to be I1; if the vehicle speed is more than or equal to 30km/h, continuously reading a vehicle speed signal;
if the vehicle speed is more than or equal to 30km/h and less than 60km/h, starting braking energy recovery and controlling the magnitude of the recovered charging current to be I2;
if the vehicle speed is more than 60km/h, braking energy recovery is started and the magnitude of the recovered charging current is controlled to be I3.
The invention adopts a tandem type braking energy recovery strategy, namely, the braking energy recovery function is quitted when ABS (anti-lock braking) is started; and strictly controlling the delay time for the brake energy recovery function to exit when the ABS is started so as to prevent the ABS regulation effect from being influenced due to overlong energy recovery delay time. The invention gives a delay time suggestion value;
and a step recovery strategy is adopted during braking energy recovery, namely different vehicle speed sections are matched with different recovery strengths (namely different recovery charging current sizes are controlled).
Referring to fig. 1, when a VCU (vehicle control unit) receives a braking signal, it is first determined whether the ABS is started, and if it is detected that the ABS is started, the braking energy is not recovered in the braking process, so as to prevent interference with the ABS adjustment effect; if the ABS is detected not to be started, reading a vehicle speed signal, and if the vehicle speed is less than 30km/h, starting braking energy recovery and controlling the magnitude of the recovered charging current to be I1; if the vehicle speed is more than 30km/h and less than 60m/h, starting braking energy recovery and controlling the magnitude of the recovered charging current to be I2; and if the vehicle speed is more than 60m/h, braking energy recovery is started, and the magnitude of the recovered charging current is controlled to be I3.
In the process of the control method, as long as the VCU detects that the ABS is started, the braking energy recovery function is rapidly quitted. From the moment the ABS is started, the time from the moment the braking energy recovery function is completely exited is not more than 70 ms.
Said I1＜I2＜I3。
During energy recovery, if the VCU detects that the ABS is started, the braking energy recovery function is rapidly quitted. For a new energy commercial vehicle, the time period from the moment when the ABS is started to the moment when the braking energy recovery function is completely quitted is not more than 70ms, otherwise the ABS regulation effect, especially the low adhesion coefficient road surface regulation effect of the ABS, is influenced.
The step recovery strategy of the braking energy is only one indication, and the specific vehicle type is refined and calibrated according to the whole parameters of the actual vehicle type so as to achieve the optimal control effect. In the actual development process, only the most appropriate recovered charging current is needed to be calibrated to match the corresponding speed per hour, so that the development period is greatly shortened, and the development cost is reduced.
According to the actual vehicle test result, the recovery rate of the vehicle adopting the step recovery strategy of the braking energy basically reaches the recovery rate of the braking energy of the same vehicle type adopting the parallel recovery strategy.
The invention has been described above with reference to the accompanying drawings, it is obvious that the invention is not limited to the specific implementation in the above-described manner, and it is within the scope of the invention to apply the inventive concept and solution to other applications without substantial modification.
Claims (4)
1. A braking energy recovery control method of a new energy vehicle is characterized by comprising the following steps: the control method comprises the following steps:
starting braking;
when the VCU receives a braking signal, firstly judging whether the ABS is started; if yes, not starting the recovery of the braking energy; if not, reading a vehicle speed signal;
if the vehicle speed is less than 30km/h, starting braking energy recovery and controlling the magnitude of the recovered charging current to be I1; if the vehicle speed is more than or equal to 30km/h, continuously reading a vehicle speed signal;
if the vehicle speed is more than or equal to 30km/h and less than 60km/h, starting braking energy recovery and controlling the magnitude of the recovered charging current to be I2;
if the vehicle speed is more than 60km/h, braking energy recovery is started and the magnitude of the recovered charging current is controlled to be I3.
2. The new energy vehicle braking energy recovery control method of claim 1, characterized in that: in the process of the control method, as long as the VCU detects that the ABS is started, the braking energy recovery function is rapidly quitted.
3. The new energy vehicle braking energy recovery control method of claim 2, characterized in that: from the moment the ABS is started, the time from the moment the braking energy recovery function is completely exited is not more than 70 ms.
4. The new energy vehicle braking energy recovery control method of claim 1, characterized in that: said I1＜I2＜I3。
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011286134.6A CN112339569A (en) | 2020-11-17 | 2020-11-17 | New energy vehicle braking energy recovery control method |
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| CN202011286134.6A CN112339569A (en) | 2020-11-17 | 2020-11-17 | New energy vehicle braking energy recovery control method |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20080037342A (en) * | 2006-10-26 | 2008-04-30 | 현대자동차주식회사 | Method for control regenerative braking of electric vehicle |
| US20100268408A1 (en) * | 2009-04-20 | 2010-10-21 | Fuji Jukogyo Kabushiki Kaisha | Control apparatus for electric vehicle |
| CN104590037A (en) * | 2014-12-16 | 2015-05-06 | 北京新能源汽车股份有限公司 | Energy feedback control method for full electric vehicle |
| CN104802645A (en) * | 2014-04-09 | 2015-07-29 | 万向电动汽车有限公司 | Parallel type electric vehicle regeneration brake system and control method thereof |
| CN105083026A (en) * | 2015-08-21 | 2015-11-25 | 奇瑞汽车股份有限公司 | Control method and apparatus of charging current |
| CN105644536A (en) * | 2016-04-11 | 2016-06-08 | 芜湖伯特利汽车安全系统股份有限公司 | Braking energy recovery system and control method based on system |
| CN106627171A (en) * | 2017-01-12 | 2017-05-10 | 重庆长安汽车股份有限公司 | Torque recycling control method and control system of pure electric vehicle |
| CN109808502A (en) * | 2017-11-22 | 2019-05-28 | 比亚迪股份有限公司 | A kind of energy feedback withdrawal control method suitable for pure electric vehicle |
| CN109968990A (en) * | 2017-12-28 | 2019-07-05 | 郑州宇通客车股份有限公司 | A kind of regenerating brake control method and device |
-
2020
- 2020-11-17 CN CN202011286134.6A patent/CN112339569A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20080037342A (en) * | 2006-10-26 | 2008-04-30 | 현대자동차주식회사 | Method for control regenerative braking of electric vehicle |
| US20100268408A1 (en) * | 2009-04-20 | 2010-10-21 | Fuji Jukogyo Kabushiki Kaisha | Control apparatus for electric vehicle |
| CN104802645A (en) * | 2014-04-09 | 2015-07-29 | 万向电动汽车有限公司 | Parallel type electric vehicle regeneration brake system and control method thereof |
| CN104590037A (en) * | 2014-12-16 | 2015-05-06 | 北京新能源汽车股份有限公司 | Energy feedback control method for full electric vehicle |
| CN105083026A (en) * | 2015-08-21 | 2015-11-25 | 奇瑞汽车股份有限公司 | Control method and apparatus of charging current |
| CN105644536A (en) * | 2016-04-11 | 2016-06-08 | 芜湖伯特利汽车安全系统股份有限公司 | Braking energy recovery system and control method based on system |
| CN106627171A (en) * | 2017-01-12 | 2017-05-10 | 重庆长安汽车股份有限公司 | Torque recycling control method and control system of pure electric vehicle |
| CN109808502A (en) * | 2017-11-22 | 2019-05-28 | 比亚迪股份有限公司 | A kind of energy feedback withdrawal control method suitable for pure electric vehicle |
| CN109968990A (en) * | 2017-12-28 | 2019-07-05 | 郑州宇通客车股份有限公司 | A kind of regenerating brake control method and device |
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