CN203780329U - Series regenerative brake system for electric vehicle - Google Patents
Series regenerative brake system for electric vehicle Download PDFInfo
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- CN203780329U CN203780329U CN201420121252.5U CN201420121252U CN203780329U CN 203780329 U CN203780329 U CN 203780329U CN 201420121252 U CN201420121252 U CN 201420121252U CN 203780329 U CN203780329 U CN 203780329U
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- brake system
- brake
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Abstract
The utility model discloses a series regenerative brake system for an electric vehicle. A brake feedback control strategy for a vehicle control unit is carried out in the following way; maximum feedback torque is calculated by the vehicle control unit according to the vehicle speed obtained through the signal of a vehicle speed sensor, pedal depth is then calculated by the vehicle control unit according to a brake pedal sensor, and maximum usable feedback torque is obtained by synthesizing the usable power of a battery in the current state; a maximum usable feedback torque instruction is sent to a motor controller by the vehicle control unit, the command is executed by the motor controller, and an actual feedback torque instruction is sent to the vehicle control unit by the motor controller; the actual feedback torque is sent to the brake system by the vehicle control unit, and brake allocation is carried out by the brake system according to the actual feedback torque. Point brake force and mechanical brake force are reasonably allocated by the series regenerative brake system and a control method thereof according to the actual vehicle condition of the electric vehicle, and the power storage battery is protected to the greatest extent.
Description
Technical field
The utility model relates to electronlmobil regeneration system, refers in particular in electronlmobil moderating process, by the serial electric electrical automobile regeneration brake system of mechanical braking and the scientific and reasonable distribution of electric braking.
Background technology
Along with new forms of energy, up-to-date technology are applied in life, electronlmobil is paid attention to by people day by day, owing to being subject to the restriction of electrokinetic cell energy density, the course continuation mileage of electronlmobil is on the low side compared with traditional vehicle, 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.Present electronlmobil, especially electrobus mainly adopts parallel braking scheme, when mechanical braking is as car brakeing, directly on vehicle, increase electric braking, two kinds of brake system parallel operations, this mode is at the initial stage of electric vehicle development, due to its low price, control system is simple, and at the electric vehicle development initial stage, Hen Shou electronlmobil manufacturer welcomes.But this parallel system mainly contains following defect:
(1) Braking system power can not comprehensively judge, electric braking and mechanical braking (as gas braking) act on respectively on electronlmobil vehicle;
(2) when a kind of braking mode goes wrong (as damaged), the braking force that another kind of pattern cannot carry out it to lose makes up, and causes driving habit to change, and easily causes safety misadventure.
China Patent Publication No. CN103171444A, in open day on June 26th, 2013, name is called in the patent of invention of " elec. vehicle regeneration brake system " and discloses a kind of method and system for abrupt deceleration vehicle.Vehicle has at least one in electronic stability controlling system and Antilock brake system.Vehicle can also comprise and is suitable for applying regenerative braking torque so that the regenerative brake of vehicle slows.Vehicle may further include the pressure sensor that is suitable for the pressure in sensing hydraulic braking pipeline.Pressure sensor can be at least one the parts in electronic stability controlling system and Antilock brake system.Vehicle can also comprise the controller that is suitable for the pressure based on sensing at least and controls the regenerative braking torque of regenerative brake.Weak point is, the determination methods of this scheme Braking system power is still limited, can not make correct relative strategy according to actual conditions.
Utility model content
The purpose of this utility model is that to overcome in prior art the parallel braking scheme control policy of electronlmobil comparatively simple, lack the defect that braking force is control effectively, a kind of serial electric electrical automobile regeneration brake system is provided, can carries out reasonable distribution to electric braking force and machine made power flexibly by this system and control method thereof.
The purpose of this utility model is to be achieved by following technical proposals:
A kind of serial electric electrical automobile regeneration brake system, comprise entire car controller, accelerator pedal sensor, brake pedal sensor, car speed sensor, battery management system, brake system and electric machine controller, accelerator pedal sensor, brake pedal sensor and speed of a motor vehicle controller are connected with entire car controller, battery management system, brake system and electric machine controller are connected with entire car controller, brake system comprises mechanical braking structure and electric braking structure, mechanical braking structure and the series connection of electric braking structure.
As a kind of preferred version, accelerator pedal sensor, brake pedal sensor and speed of a motor vehicle controller are connected with entire car controller by rigid line.
As a kind of preferred version, battery management system, brake system and electric machine controller are connected with entire car controller by CAN bus.
A kind of serial electric electrical automobile regeneration brake system control method, based on serial electric electrical automobile regeneration brake system, comprises the following steps:
Step 1, whether accelerator pedal sensor detects acceleration pedal and unclamps, if acceleration pedal unclamps, jumps to step 2, if acceleration pedal does not unclamp, accelerator pedal sensor continues to detect;
Acceleration pedal unclamps, and shows that electronlmobil enters deceleration regime, and automobile prepares to enter braking mode.
Step 2, car speed sensor detects the speed of a motor vehicle, if the speed of a motor vehicle is more than or equal to feedback restriction rotating speed V1, jumps to step 3, if the speed of a motor vehicle is less than feedback restriction rotating speed V1, does not carry out regenerative brake;
In the time that the speed of a motor vehicle is less than feedback restriction rotating speed V1, consider for occupant's traveling comfort, do not carry out regenerative brake, brake system only utilizes machine made power to brake.
Step 3, brake pedal sensor detects that chaufeur steps on after brake pedal, and entire car controller carries out feedback braking control policy, and feedback braking control policy comprises 3 sub-steps:
Sub-step 1, the speed of a motor vehicle that entire car controller draws according to car speed sensor signal, calculates maximum feedback moment of torsion, and entire car controller calculates the pedal degree of depth according to brake pedal sensor again, draws maximum available feedback moment of torsion;
Maximum feedback moment of torsion is theoretic maxim, and the brake pedal degree of depth is darker, and maximum available feedback moment of torsion approaches maximum feedback moment of torsion.
Sub-step 2, available maximum feedback torque command is sent to electric machine controller by entire car controller, and electric machine controller executive command also sends to entire car controller by actual feedback torque command;
Sub-step 3, actual feedback moment of torsion is sent to brake system by entire car controller, and brake system is carried out brakig force distribution according to actual feedback moment of torsion.Wherein electric braking force part is the braking force that actual feedback moment of torsion produces, the braking force that all the other required braking forces produce for mechanical braking.
As a kind of preferred version, step 3 does not also comprise when brake pedal sensor detects chaufeur steps on brake pedal, jumps to step 4;
Step 4, entire car controller slides feedback control policy, slides feedback control policy and comprises 4 sub-steps:
Sub-step 4, the speed of a motor vehicle that entire car controller draws according to car speed sensor signal, calculates maximum feedback moment of torsion, more maximum feedback moment of torsion is weighted to correction, draws and slides feedback moment of torsion;
Weighting is modified to a preset parameter, maximum feedback moment of torsion and a fixed ratio that slides feedback moment of torsion.
Sub-step 5, entire car controller will slide feedback torque command and issue electric machine controller, and electric machine controller executive command also sends to entire car controller by the actual feedback torque command that slides;
Sub-step 6, if entire car controller receives brake pedal sensor or accelerator pedal sensor signal, exits and slides feedback control policy.When brake pedal sensor receives that after the signal that automobile brakes, brake system is according to the actual feedback torque distribution electric braking force that slides, the braking force that all the other required braking forces produce for mechanical braking.
As a kind of preferred version, maximum feedback moment of torsion is: in the time that the speed of a motor vehicle is between feedback restriction rotating speed V1 and setting speed V2, the numerical value of maximum feedback moment of torsion is linear increasing along with the increase of rotating speed, when the speed of a motor vehicle at setting speed V2 between setting speed V3 time, maximum feedback moment of torsion is constant, in the time that the speed of a motor vehicle is greater than setting speed V3, maximum feedback moment of torsion reduces along with the increase of rotating speed.
The speed of a motor vehicle is in the time that feedback limits between rotating speed V1 and setting speed V2; maximum feedback moment of torsion is linear increasing along with the increase of rotating speed; and the speed of a motor vehicle at setting speed V2 between setting speed V3 time; maximum feedback moment of torsion is constant; reason is the maximum feedback moment of torsion that has reached available, and when the speed of a motor vehicle is greater than setting speed V3, maximum feedback moment of torsion reduces along with the increase of rotating speed; reason is in order to protect power accumulator, and the peak power of regenerative brake is limited.
As a kind of preferred version, the speed of a motor vehicle that sub-step 1 draws according to car speed sensor signal for entire car controller, calculate maximum feedback moment of torsion, entire car controller calculates the pedal degree of depth according to brake pedal sensor again, available power state under the current state of comprehensive battery, draws maximum available feedback moment of torsion.Battery management system can provide battery available power state, and the available feedback moment of torsion of maximum is revised, and has further protected power accumulator.
As a kind of preferred version, the speed of a motor vehicle that sub-step 4 draws according to car speed sensor signal for entire car controller, calculates maximum feedback moment of torsion, more maximum feedback moment of torsion is weighted to correction, available power state under the current state of comprehensive battery, draws and slides feedback moment of torsion.
The beneficial effects of the utility model are that serial electric electrical automobile regeneration brake system can carry out reasonable distribution to a braking force and machine made power according to the actual vehicle condition of electronlmobil, and has protected to greatest extent power accumulator.The utility model is simple in structure, and tactic is strong, is easy to realize.
Brief description of the drawings
Fig. 1 is a kind of circuit theory connection diagram of the present utility model;
Fig. 2 is a kind of diagram of circuit of the present utility model;
Fig. 3 is the particular flow sheet that Fig. 2 entire car controller carries out feedback braking control policy;
Fig. 4 be brake pedal sensor when not detecting brake pedal and stepping on entire car controller carry out the particular flow sheet of feedback braking control policy.
Wherein: 1, accelerator pedal sensor, 2, brake pedal sensor, 3, car speed sensor, 4, battery management system, 5, electrokinetic cell, 6, brake system, 7, motor, 8, electric machine controller, 9, entire car controller.
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model is further described.
Embodiment 1: a kind of serial electric electrical automobile regeneration brake system, its circuit theory connection diagram as shown in Figure 1, comprise entire car controller 9, accelerator pedal sensor 1, brake pedal sensor 2, car speed sensor 3, battery management system 4, brake system 6 and electric machine controller 8, accelerator pedal sensor, brake pedal sensor and speed of a motor vehicle controller are connected with entire car controller by rigid line, and battery management system, brake system and electric machine controller are connected with entire car controller by CAN bus.Battery management system is for dynamics of management battery 5, and electric machine controller is used for controlling motor 7.Brake system comprises mechanical braking structure and electric braking structure, mechanical braking structure and the series connection of electric braking structure.
The control method of serial electric electrical automobile regeneration brake system, its diagram of circuit as shown in Figure 2, comprises the following steps:
Step 1, whether accelerator pedal sensor detects acceleration pedal and unclamps, if acceleration pedal unclamps, jumps to step 2, if acceleration pedal does not unclamp, accelerator pedal sensor continues to detect;
Step 2, car speed sensor detects the speed of a motor vehicle, if the speed of a motor vehicle is more than or equal to feedback restriction rotating speed V1, jumps to step 3, if the speed of a motor vehicle is less than feedback restriction rotating speed V1, does not carry out regenerative brake;
Step 3, brake pedal sensor detects that chaufeur steps on after brake pedal, and entire car controller carries out feedback braking control policy, and feedback braking control policy comprises 3 sub-steps, as shown in Figure 3:
Sub-step 1, the speed of a motor vehicle that entire car controller draws according to car speed sensor signal, calculates maximum feedback moment of torsion, and entire car controller calculates the pedal degree of depth according to brake pedal sensor again, available power state under the current state of comprehensive battery, draws maximum available feedback moment of torsion;
Sub-step 2, available maximum feedback torque command is sent to electric machine controller by entire car controller, and electric machine controller executive command also sends to entire car controller by actual feedback torque command;
Sub-step 3, actual feedback moment of torsion is sent to brake system by entire car controller, and brake system is carried out brakig force distribution according to actual feedback moment of torsion.
Maximum feedback moment of torsion is: in the time that the speed of a motor vehicle is between feedback restriction rotating speed V1 and setting speed V2, the numerical value of maximum feedback moment of torsion is linear increasing along with the increase of rotating speed, when the speed of a motor vehicle at setting speed V2 between setting speed V3 time, maximum feedback moment of torsion is constant, in the time that the speed of a motor vehicle is greater than setting speed V3, maximum feedback moment of torsion reduces along with the increase of rotating speed.
Embodiment 2, a kind of serial electric electrical automobile regeneration brake system, its structure is identical with embodiment 1, and control method difference from Example 1 is, and step 3 does not also comprise when brake pedal sensor detects chaufeur steps on brake pedal, jumps to step 4;
Step 4, entire car controller slides feedback control policy, slides feedback control policy specifically as shown in Figure 4, comprises 4 sub-steps:
Sub-step 4, the speed of a motor vehicle that entire car controller draws according to car speed sensor signal, calculates maximum feedback moment of torsion, more maximum feedback moment of torsion is weighted to correction, and the available power state under the current state of comprehensive battery, draws and slides feedback moment of torsion;
Sub-step 5, entire car controller will slide feedback torque command and issue electric machine controller, and electric machine controller executive command also sends to entire car controller by the actual feedback torque command that slides;
Sub-step 6, if entire car controller receives brake pedal sensor or accelerator pedal sensor signal, exits and slides feedback control policy.
Claims (4)
1. a serial electric electrical automobile regeneration brake system, it is characterized in that, comprise entire car controller, accelerator pedal sensor, brake pedal sensor, car speed sensor, brake system and electric machine controller, accelerator pedal sensor, brake pedal sensor and speed of a motor vehicle controller are connected with entire car controller, brake system is connected with entire car controller with electric machine controller, brake system comprises mechanical braking structure and electric braking structure, mechanical braking structure and the series connection of electric braking structure.
2. a kind of serial electric electrical automobile regeneration brake system according to claim 1, is characterized in that, also comprise battery management system, battery management system is connected with entire car controller.
3. a kind of serial electric electrical automobile regeneration brake system according to claim 1 and 2, is characterized in that, accelerator pedal sensor, brake pedal sensor and speed of a motor vehicle controller are connected with entire car controller by rigid line.
4. a kind of serial electric electrical automobile regeneration brake system according to claim 1 and 2, is characterized in that, battery management system, brake system and electric machine controller are connected with entire car controller by CAN bus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420121252.5U CN203780329U (en) | 2014-03-18 | 2014-03-18 | Series regenerative brake system for electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420121252.5U CN203780329U (en) | 2014-03-18 | 2014-03-18 | Series regenerative brake system for electric vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203780329U true CN203780329U (en) | 2014-08-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420121252.5U Expired - Fee Related CN203780329U (en) | 2014-03-18 | 2014-03-18 | Series regenerative brake system for electric vehicle |
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| CN (1) | CN203780329U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104802647A (en) * | 2014-03-18 | 2015-07-29 | 万向电动汽车有限公司 | Tandem type regenerating braking system for electric automobile and control method thereof |
| CN105480115A (en) * | 2015-11-24 | 2016-04-13 | 华晨汽车集团控股有限公司 | Torque control method capable of preventing electric automobile from generating pedal locking phenomenon |
-
2014
- 2014-03-18 CN CN201420121252.5U patent/CN203780329U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104802647A (en) * | 2014-03-18 | 2015-07-29 | 万向电动汽车有限公司 | Tandem type regenerating braking system for electric automobile and control method thereof |
| CN105480115A (en) * | 2015-11-24 | 2016-04-13 | 华晨汽车集团控股有限公司 | Torque control method capable of preventing electric automobile from generating pedal locking phenomenon |
| CN105480115B (en) * | 2015-11-24 | 2017-11-03 | 华晨汽车集团控股有限公司 | One kind prevents electric automobile from the torque control method of " dead pedal phenomenon " occur |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140820 Termination date: 20200318 |
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| CF01 | Termination of patent right due to non-payment of annual fee |