CN203902310U - Parallel connection type regenerative braking system of electric automobile - Google Patents
Parallel connection type regenerative braking system of electric automobile Download PDFInfo
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- CN203902310U CN203902310U CN201420168499.2U CN201420168499U CN203902310U CN 203902310 U CN203902310 U CN 203902310U CN 201420168499 U CN201420168499 U CN 201420168499U CN 203902310 U CN203902310 U CN 203902310U
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Abstract
The utility model discloses a parallel connection type regenerative braking system of an electric automobile. The system comprises a center processing unit, an automobile speed sensor, an accelerating pedal position sensor, a braking pedal position sensor, a battery management system, a power battery, a motor controller and a motor, wherein the center processing unit is electrically connected with the automobile speed sensor, the accelerating pedal position sensor, the braking pedal position sensor, the battery management system and the motor controller; the battery management system is also electrically connected with the power battery; the motor controller is also electrically connected with the motor. When the system implements regenerative braking, the highest feedback power is limited according to a maximum power acceptable to an existing power battery; therefore the power battery is protected.
Description
Technical field
The utility model relates to electric vehicle engineering field, relates in particular to a kind of parallel electronlmobil regeneration brake system.
Background technology
Along with traditional energy growing tension, electronlmobil is paid attention to by people day by day, the development of electronlmobil more and more receives people's concern, be subject to the restriction of energy content of battery density, the course continuation mileage of electronlmobil is not high, and motor itself has the dual nature of the driving of can be used as and generating, utilize motor as electrical generator, in the situation that not needing to increase extra means, the kinetic transformation that vehicle is wasted in braking procedure is that electrical power storage is in power-supply system, can effectively improve energy utilization rate, increase course continuation mileage, save the energy.When calculating feedback moment of torsion, existing electronlmobil regeneration brake system do not have according to the SOP of electrokinetic cell (State ofPower, available output under battery current state) situation limits the highest feedback power, may cause battery to damage or life-span minimizing because feedback electric current is excessive, also may cause in some cases motor to damage.
China Patent Publication No. CN102501772, open day on June 20th, 2012, the name of utility model is called brake feedback control circuit and the method for electronlmobil, this application case discloses a kind of brake feedback control circuit and method of electronlmobil, it comprises controller, electrokinetic cell, motor and for controlling the first DC contactor and second DC contactor of the break-make of circuit between described electrokinetic cell and motor, one braking resistor and described motor parallel setting, described braking resistor is controlled the break-make of circuit between described braking resistor and described motor by one the 3rd DC contactor and a fuse.Its weak point is that this brake feedback control circuit does not consider that the SOP situation of electrokinetic cell limits the highest feedback power, may cause battery to damage or life-span minimizing because feedback electric current is excessive.
Summary of the invention
The purpose of this utility model is to overcome existing electronlmobil regeneration brake system according to the SOP situation of electrokinetic cell, the highest feedback power not to be limited; may be because the excessive technical matters that causes battery damage or life-span minimizing of feedback electric current; a kind of parallel electronlmobil regeneration brake system is provided; it is when carrying out regenerative brake; the maximum power that can accept according to current electrokinetic cell limits the highest feedback power, protection electrokinetic cell.
In order to address the above problem, the utility model is achieved by the following technical solutions:
A kind of parallel electronlmobil regeneration brake system of the present utility model, comprise central processing unit, car speed sensor, accelerator pedal position sensor, brake pedal position sensor, battery management system, electrokinetic cell, electric machine controller and motor, described central processing unit is electrically connected to car speed sensor, accelerator pedal position sensor, brake pedal position sensor, battery management system and electric machine controller respectively, described battery management system is also electrically connected to electrokinetic cell, and described electric machine controller is also electrically connected to motor.
In the technical program, car speed sensor detects current vehicle speed; Whether accelerator pedal position sensor detects acceleration pedal and is operated; Brake pedal position sensor detects the degree of depth that brake pedal is operated; Battery management system dynamics of management battery, and the maximum power information that current electrokinetic cell can be accepted sends to central processing unit; Motor controller controls machine operation.
When acceleration pedal unclamps, first central processing unit gathers speed information, when the speed of a motor vehicle is less than feedback restriction rotating speed V1, does not carry out regenerative brake; When the speed of a motor vehicle is more than or equal to feedback restriction rotating speed V1, carry out regenerative brake.
Enter after regenerative brake, whether central processing unit detects brake pedal and is operated.If brake pedal is operated, the maximum power P that the current electrokinetic cell that the depth S that the brake pedal that the current vehicle speed V that central processing unit detects according to car speed sensor, brake pedal position sensor detect is operated and battery management system send can be accepted
max1calculate the available feedback torque T 1 of current maximum; If brake pedal is not operated, the maximum power P that the current electrokinetic cell that the current vehicle speed V that central processing unit detects according to car speed sensor and battery management system send can be accepted
max1calculate and slide feedback torque T 2.
Central processing unit is by the available feedback torque T 1 of the maximum calculating or slide feedback torque T 2 and send to electric machine controller, motor controller controls motor is worked with given feedback moment of torsion, now motor is as electrical generator, by the kinetic transformation of brake loss be electric energy to power battery charging, guarantee that the charge power of electrokinetic cell is no more than the maximum power that current electrokinetic cell can be accepted.
As preferably, described central processing unit is also electrically connected to ABS system by communicating circuit.Enter after regenerative brake, when brake pedal is operated, if ABS system works now is not carried out regenerative brake, guarantee car brakeing safety.
As preferably, described central processing unit is electrically connected to battery management system and electric machine controller by CAN bus.
As preferably, described central processing unit is entire car controller.
As preferably, described a kind of parallel electronlmobil regeneration brake system also comprises that alarm module and detection regeneration brake system output to the current sensor of the charging current of electrokinetic cell, and described alarm module and current sensor are electrically connected to central processing unit respectively.The charging current of electrokinetic cell when current sensor detects regenerative brake, if current value is greater than the threshold value (feedback electric current is excessive) of setting, central processing unit controls alarm module sends warning, reminds chaufeur regeneration brake system to break down.
As preferably, described communicating circuit comprises resistance R 1, resistance R 2, resistance R 3, capacitor C 1, aerotron Q and photoelectrical coupler U1, the power supply of described ABS system is electrically connected to an input end of photoelectrical coupler U1 by resistance R 2, described ABS system is connected with the base stage of aerotron Q by resistance R 1, the collecting electrode of described aerotron Q is electrically connected to another input end of photoelectrical coupler U1, the grounded emitter of described aerotron Q, a mouth of described photoelectrical coupler U1 is electrically connected to the power supply of central processing unit, another mouth of described photoelectrical coupler U1 and resistance R 3 one end, capacitor C 1 one end and central processing unit are electrically connected to, described resistance R 3 other ends and capacitor C 1 other end ground connection.
When ABS system output high level, photoelectrical coupler U1 conducting, central processing unit receives high level signal; When ABS system output low level, not conducting of photoelectrical coupler U1, central processing unit receives low level signal.Photoelectrical coupler U1 plays photoelectricity buffer action, improves antijamming capability.
The beneficial effects of the utility model are: (1), when carrying out regenerative brake, the maximum power that can accept according to current electrokinetic cell limits the highest feedback power, protection electrokinetic cell.(2) according to the brake pedal degree of depth, regenerative brake is controlled, driver comfort is good.(3) increase ABS action message, guarantee the safety of car brakeing.
Accompanying drawing explanation
Fig. 1 is that a kind of circuit theory of the present utility model connects block diagram;
Fig. 2 is the schematic circuit diagram of communicating circuit of the present utility model.
In figure: 1, central processing unit, 2, car speed sensor, 3, accelerator pedal position sensor, 4, brake pedal position sensor, 5, battery management system, 6, electrokinetic cell, 7, electric machine controller, 8, motor, 9, ABS system, 10, communicating circuit, 11, alarm module, 12, current sensor.
The specific embodiment
Below by embodiment, and by reference to the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment: a kind of parallel electronlmobil regeneration brake system of the present embodiment, as shown in Figure 1, comprise central processing unit 1, car speed sensor 2, accelerator pedal position sensor 3, brake pedal position sensor 4, battery management system 5, electrokinetic cell 6, electric machine controller 7, motor 8, alarm module 11 and detection regeneration brake system output to the current sensor 12 of the charging current of electrokinetic cell 6, central processing unit 1 is by CAN bus and battery management system 5 and electric machine controller 7, central processing unit 1 is electrically connected to ABS system 9 by communicating circuit 10, central processing unit 1 also respectively with car speed sensor 2, accelerator pedal position sensor 3, brake pedal position sensor 4, alarm module 11 and current sensor 12 are electrically connected to, battery management system 5 is also electrically connected to electrokinetic cell 6, electric machine controller 7 is also electrically connected to motor 8, central processing unit 1 is entire car controller.
As shown in Figure 2, communicating circuit 10 comprises resistance R 1, resistance R 2, resistance R 3, capacitor C 1, aerotron Q and photoelectrical coupler U1, the power supply of ABS system 9 is electrically connected to an input end of photoelectrical coupler U1 by resistance R 2, ABS system 9 is connected with the base stage of aerotron Q by resistance R 1, the collecting electrode of aerotron Q is electrically connected to another input end of photoelectrical coupler U1, the grounded emitter of aerotron Q, a mouth of photoelectrical coupler U1 is electrically connected to the power supply of central processing unit 1, another mouth of photoelectrical coupler U1 and resistance R 3 one end, capacitor C 1 one end and central processing unit 1 are electrically connected to, resistance R 3 other ends and capacitor C 1 other end ground connection.
When ABS system 9 output high level, photoelectrical coupler U1 conducting, central processing unit 1 receives high level signal; When ABS system 9 output low level, not conducting of photoelectrical coupler U1, central processing unit 1 receives low level signal.Photoelectrical coupler U1 plays photoelectricity buffer action, improves antijamming capability.
Car speed sensor 2 detects current vehicle speed; Whether accelerator pedal position sensor 3 detects acceleration pedal and is operated; Brake pedal position sensor 4 detects the degree of depth that brake pedal is operated; Battery management system 5 dynamics of management batteries 6, and the maximum power information that current electrokinetic cell 6 can be accepted sends to central processing unit 1; Electric machine controller 7 is controlled motor 8 work.
When acceleration pedal unclamps, first central processing unit 1 gathers speed information, when the speed of a motor vehicle is less than feedback restriction rotating speed V1, does not carry out regenerative brake; When the speed of a motor vehicle is more than or equal to feedback restriction rotating speed V1, carry out regenerative brake.
Enter after regenerative brake, whether central processing unit 1 detects brake pedal and is operated.If brake pedal is operated, and not action of ABS system 9, the maximum power P that the current electrokinetic cell 6 that the depth S that the brake pedal that the current vehicle speed V that central processing unit 1 detects according to car speed sensor 2, brake pedal position sensor 4 detect is operated and battery management system 5 send can be accepted
max1calculate the available feedback torque T 1 of current maximum; If brake pedal is not operated, the maximum power P that the current electrokinetic cell 6 that the current vehicle speed V that central processing unit 1 detects according to car speed sensor 2 and battery management system 5 send can be accepted
max1calculate and slide feedback torque T 2.
Central processing unit 1 is by the available feedback torque T 1 of the maximum calculating or slide feedback torque T 2 and send to electric machine controller 7, electric machine controller 7 is controlled motor 8 and is worked with given feedback moment of torsion, now motor 8, as electrical generator, is that electric energy is to power battery charging by the kinetic transformation of brake loss.
The charging current of electrokinetic cell 6 when current sensor 12 detects regenerative brake, if current value is greater than the threshold value (feedback electric current is excessive) of setting, central processing unit 1 is controlled alarm module 11 and is sent warning, reminds chaufeur regeneration brake system to break down.
Calculating the available feedback torque T 1 of current maximum comprises the following steps:
First according to vehicle velocity V, calculate maximum feedback torque T
max1,
When V1≤V<V2, T
max1=K1 * (V-V1),
When V2≤V≤V3, T
max1t
max2,
When V>V3, T
max1k2 * P
max2/ V,
Wherein, K1, the K2 constant for setting, T
max2for the maximum feedback moment of torsion of motor of setting, P
max2for the maximum feedback power of motor of setting,
Then according to motor speed N and maximum feedback torque T
max1, calculate the maximum charge power P 1 under this speed of a motor vehicle, P1=T
max1* N/9550,
If P1≤P
max1, maximum available feedback torque T 1=K3 * T
max1,
If P1>P
max1, maximum available feedback torque T 1=K3 * K2 * P
max1/ V,
Wherein, K3=S/S1, S1 is the degree of depth that brake pedal is floored, P
max1the maximum power that can accept for current electrokinetic cell.
Calculating is slided feedback torque T 2 and is comprised the following steps:
First according to vehicle velocity V, calculate maximum feedback torque T
max1,
When V1≤V<V2, T
max1=K1 * (V-V1),
When V2≤V≤V3, T
max1t
max2,
When V>V3, T
max1=K2 * P
max2/ V,
Wherein, K1, the K2 constant for setting, T
max2for the maximum feedback moment of torsion of motor of setting, P
max2for the maximum feedback power of motor of setting,
Then according to motor speed N and maximum feedback torque T
max1, calculate the maximum charge power P 2 under this speed of a motor vehicle, P2=K4 * T
max1* N/9550, the constant of K4 for setting,
If P2≤P
max1, slide feedback torque T 2=K4 * T
max1,
If P2>P
max1, slide feedback torque T 2=K4 * K2 * P
max1/ V.
Claims (4)
1. a parallel electronlmobil regeneration brake system, it is characterized in that: comprise central processing unit (1), car speed sensor (2), accelerator pedal position sensor (3), brake pedal position sensor (4), battery management system (5), electrokinetic cell (6), electric machine controller (7) and motor (8), described central processing unit (1) respectively with car speed sensor (2), accelerator pedal position sensor (3), brake pedal position sensor (4), battery management system (5) and electric machine controller (7) are electrically connected to, described battery management system (5) is also electrically connected to electrokinetic cell (6), described electric machine controller (7) is also electrically connected to motor (8), described central processing unit (1) is also electrically connected to ABS system (9) by communicating circuit (10), described central processing unit (1) is electrically connected to battery management system (5) and electric machine controller (7) by CAN bus.
2. a kind of parallel electronlmobil regeneration brake system according to claim 1, is characterized in that: described central processing unit (1) is entire car controller.
3. a kind of parallel electronlmobil regeneration brake system according to claim 1, it is characterized in that: also comprise alarm module (11) and detect the current sensor (12) that regeneration brake system outputs to the charging current of electrokinetic cell (6), described alarm module (11) and current sensor (12) are electrically connected to central processing unit (1) respectively.
4. a kind of parallel electronlmobil regeneration brake system according to claim 1, it is characterized in that: described communicating circuit (10) comprises resistance R 1, resistance R 2, resistance R 3, capacitor C 1, aerotron Q and photoelectrical coupler U1, the power supply of described ABS system (9) is electrically connected to an input end of photoelectrical coupler U1 by resistance R 2, described ABS system (9) is connected with the base stage of aerotron Q by resistance R 1, the collecting electrode of described aerotron Q is electrically connected to another input end of photoelectrical coupler U1, the grounded emitter of described aerotron Q, a mouth of described photoelectrical coupler U1 is electrically connected to the power supply of central processing unit (1), another mouth of described photoelectrical coupler U1 and resistance R 3 one end, capacitor C 1 one end and central processing unit (1) are electrically connected to, described resistance R 3 other ends and capacitor C 1 other end ground connection.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420168499.2U CN203902310U (en) | 2014-04-09 | 2014-04-09 | Parallel connection type regenerative braking system of electric automobile |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420168499.2U CN203902310U (en) | 2014-04-09 | 2014-04-09 | Parallel connection type regenerative braking system of electric automobile |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115195485A (en) * | 2022-09-13 | 2022-10-18 | 达芬骑动力科技(北京)有限公司 | Vehicle power recovery method and system and vehicle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115195485A (en) * | 2022-09-13 | 2022-10-18 | 达芬骑动力科技(北京)有限公司 | Vehicle power recovery method and system and vehicle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200409 Address after: 310000 No.42 Beitang Road, Xiaoshan District, Hangzhou City, Zhejiang Province Patentee after: Tens of thousands of Qingyuan intelligent motor car Co., Ltd Address before: 311215 No. two, No. 118, Xiaoshan economic and Technological Development Zone, Hangzhou, Zhejiang Co-patentee before: WANXIANG GROUP Co.,Ltd. Patentee before: WANGXIANG EV Co.,Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141029 Termination date: 20210409 |