CN105730249A - Braking energy recovery and distribution method for electric vehicle - Google Patents
Braking energy recovery and distribution method for electric vehicle Download PDFInfo
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- CN105730249A CN105730249A CN201610102095.7A CN201610102095A CN105730249A CN 105730249 A CN105730249 A CN 105730249A CN 201610102095 A CN201610102095 A CN 201610102095A CN 105730249 A CN105730249 A CN 105730249A
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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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- Power Engineering (AREA)
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- Mechanical Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention provides a braking energy recovery and distribution method for an electric vehicle. The vehicle comprises a motor, a motor controller and an electricity storage device, all of which are sequentially connected. Vehicle braking energy is recovered to the electricity storage device through the motor. The method includes the step that a certain parameter of the electricity storage device is detected, wherein a braking energy recovery proportion of the electricity storage device is changed along with the parameter of the electricity storage device. In order to overcome the common defects in braking energy recovery strategy design in the prior art, the braking energy recovery and distribution method is provided, the recovery proportion is adjusted along with the changes of the electric quantity of the electricity storage device used for recovering energy, and the recovery use ratio of the braking energy is increased.
Description
Technical field
The present invention relates to wagon control technology, especially the Brake energy recovery distribution method of electric vehicle.
Background technology
In electric automobile, one of most important parts are accumulator.The size of accumulator storage electricity determines the size of the course continuation mileage of vehicle.Current accumulator remains the bottleneck that Development of Electric Vehicles cannot be broken through, and electric automobile continual mileage still cannot meet people's needs.In order to solve in prior art the contradiction between accumulator Development Technology and people's demand, the method being developed various increase energy utilization efficiency, is typically wherein Brake energy recovery.Current Brake energy recovery strategy is prevalent among electric automobile and oil-electric vehicle, it is common practice to braking energy produced by car braking is all recycled to electrical storage device in car, such as accumulator.But battery technology still suffers from bottleneck at present, it is impossible to completing high-power high-current output input, energy regenerating effect is unobvious especially.Some hybrid vehicle is configured with power-type electrical storage device, such as super capacitor, it is possible to the big electric current input and output of instantaneous offer, but super capacitor finite capacity, if braking is frequently, will soon be filled.In recovery, for the research of Brake energy recovery in current technology, mostly concentrate on the calculating of energy, opportunity of recovery and how to increase organic efficiency.If able to Accurate Prediction braking energy reasonable distribution are recycled to the electric energy of electrical storage device, by the diversification utilization for later braking energy, braking energy is more efficiently utilized to provide technical foundation.
Summary of the invention
The present invention is directed to the common defects in Brake energy recovery strategy being designed in prior art, it is proposed to a kind of Brake energy recovery distribution method, along with scale is reclaimed in the electrical storage device electric quantity change adjustment being used for recovering energy, improve the recovery utilization rate of braking energy.
A kind of electric vehicle braking energy regenerating distribution method, described vehicle includes the motor, motor controller and the electrical storage device that are sequentially connected with；Vehicle braking energy is recycled to described electrical storage device by motor；The method includes: detect a certain parameter of described electrical storage device, and described electrical storage device reclaims braking energy ratio with this Parameters variation of electrical storage device.
Preferably in, described electrical storage device is power-type electrical storage device.It is ultracapacitor further.
As the preferred mode of one, the braking energy that described ultracapacitor once reclaims accounts for the ratio of this total braking energy and described ultracapacitor voltage negative correlation, and described parameter is the electricity of ultracapacitor or voltage or temperature.Reduce along with super capacitor electricity or voltage increase this ratio.Further ultracapacitor reclaims the ratio of braking energy and successively decreases with described ultracapacitor pressure-wire.
Or, described electrical storage device is energy type electrical storage device.It is accumulator further.
As the preferred mode of one, described accumulator once reclaims braking energy and accounts for the ratio of this total braking energy and described accumulator electric-quantity negative correlation, and described parameter is electricity or the temperature of accumulator.Reduce along with super capacitor electricity or voltage increase this ratio.The ratio of described Battery recycling braking energy is with described accumulator electric-quantity linear decrease.
Described motor is Dual winding electric motor.
Accompanying drawing explanation
Fig. 1 is the one of which electric vehicle model schematic that the present invention is based on.
Fig. 2 is the relation between power-type electrical storage device energy regenerating ratio A and electrical storage device voltage Uc of the present invention.
Fig. 3 is the relation between energy type electrical storage device energy regenerating ratio B and electrical storage device electricity SOC of the present invention.
Fig. 4 is based on the method for recovering brake energy flow chart of the present invention.
Detailed description of the invention
Below, the accompanying drawing with reference to the part forming this specification illustrates in greater detail embodiments of the present invention.In all of the figs same or similar part added same reference marker and omit the description.
The electric vehicle that the present invention is based on, it may be possible to there is power-type electrical storage device or the electric vehicle of energy type electrical storage device, it is also possible to refer to the electric vehicle with power-type charge storage unit and the mixing use of energy type charge storage unit.It is the typical model of the motor that the present invention relates to as shown in Figure 1.Vehicle has motor, connects wheel and is used for driving vehicle to travel；Motor controller, is connected to motor, so that motor to be controlled, drives vehicle and control motor to reverse to reclaim vehicle braking energy including controlling motor rotating forward；Electrical storage device, is connected to motor controller, provides electric energy for motor rotation, or by Brake energy recovery to electrical storage device during car braking；Electrical storage device manager BMS/CMS, is connected with electrical storage device and electrical storage device detecting device, monitoring electrical storage device electricity, temperature, electric current etc.；Entire car controller, with motor controller, electrical storage device manager BMS/CMS communication connection, coordination car load electric energy input and output, overall control vehicle running state.
In the present invention, indication power-type electrical storage device refers to such as super capacitor, power-type accumulator etc., with high power density for feature, is mainly used in transient high power input, output；Energy type electrical storage device, with high-energy-density for feature, is mainly used in high-energy output, it is provided that lasting electric energy supply.Motor refers to for driving vehicle to travel, convert electrical energy into mechanical workable device, with generator operation simultaneously when motor possesses car braking, by Brake energy recovery to the electrical storage device being attached thereto.
Energy regenerating distribution method provided by the invention discussed in detail below.
First, electric vehicle braking energy regenerating distribution method provided by the invention, vehicle includes motor and the power-type electrical storage device being connected with motor, refers in particular to super capacitor.In concrete case study on implementation, motor is connected with super capacitor by motor controller.When motor provides driving force, motor controller obtaining electric energy from super capacitor, supply motor changes into mechanical energy；When car braking, motor controller controls motor reversion, works with generator forms, braking mechanical energy is recycled to super capacitor.This method is different from traditional super capacitor that is all recycled to by braking energy till super capacitor electricity is full, but by controlling the energy regenerating ratio of super capacitor, in a planned way utilizes and recover energy, protect super capacitor simultaneously.Described energy regenerating ratio refers to and reclaims braking energy according to certain ratio, rather than all reclaim, this ratio is recovery ratio, it is possible to the accounting being with once braking gross energy, it is also possible to be the ratio of the energy that other retracting device with its assignment system energy reclaims.
Specifically, by being arranged at the detecting device on ultracapacitor, detect super capacitor parameter, such as voltage or temperature, determine the ratio reclaiming braking energy according to the voltage detected or temperature.When above-mentioned parameter is temperature, it is possible to arrange temperature more high, the ratio of recovery is more little, it is possible to while recovering energy, and protects ultracapacitor better.The embodiment being above-mentioned parameter with voltage is described below in detail.
As a kind of energy method of salary distribution, when car braking is set, it is recycled to super capacitor energy proportion, this ratio A and super capacitor electricity negative correlation.Owing to super capacitor electricity is directly proportional to super-capacitor voltage, so ratio A can also with super-capacitor voltage Uc negative correlation.Namely super-capacitor voltage Uc is more high, reclaims ratio A more little, and the energy being recycled to super capacitor is more few.For the irretrievable energy of super capacitor, it is possible to reclaim for other electrical storage device in car or consume or directly abandon, in order to avoid super capacitor reclaims excessively causes waste, even damage super capacitor.
Further, it is possible to be arranged to recovery ratio A linearly successively decrease relation with super-capacitor voltage Uc, its relation is as shown in Figure 2.It is specially, according to practical situation, minimum and ceiling voltage Uc1, the Uc2 that can reach when super capacitor energy regenerating is set, maximum ratio and minimum scale A1, A2 of the energy regenerating of correspondence are set, by (A1, Uc1) and (A2, Uc2) line segment of determining be the recovery ratio of super capacitor.Linear decrease relation is simplest negative correlativing relation between ratio A and super-capacitor voltage Uc.More complicated data acquisition and processing (DAP) can also be passed through, when gathering different super-capacitor voltage Uc, it is best suited for the ratio A that super capacitor reclaims, obtain organizing voltage (Uc1, Uc2, Uc3 ...) and ratio (A1, A2, A3 ...) more, obtain super capacitor by the mode of matching and reclaim ratio A.Super-capacitor voltage Uc can be formed by the method and reclaim the relation of ratio A, forming data base or tables of data, obtaining, by the mode tabled look-up, the recovery ratio A that ultracapacitor voltage is corresponding when execution ultracapacitor recovers energy task.
As the electric vehicle using this method, being provided with motor and connected motor controller, motor controller connects ultracapacitor, and motor controller is connected to entire car controller.Arranging detecting device on ultracapacitor, this detecting device can detect super-capacitor voltage, temperature etc..Super capacitor detecting device is connected with super capacitance management device or entire car controller.During brake, entire car controller receives brake signal, and first whether detection supercapacitor temperature meets recovering condition, if temperature is too high does not meet recovering condition, then abandons utilizing ultracapacitor to recover energy；If supercapacitor temperature meets recovering condition, obtain ultracapacitor electricity by detecting device, according to the recovery ratio A in implant controller (entire car controller or super capacitance management device), carry out energy regenerating.Causing that ultracapacitor voltage Uc is continually changing along with ultracapacitor recovers energy, the detection of above-mentioned supercapacitor temperature and voltage should be in real time or carry out according to certain frequency, accurately to determine recovery ratio A.
For the recovery of electric vehicle braking energy, the present invention provides another kind of method, and vehicle includes motor and the energy type electrical storage device being connected with motor, refers in particular to accumulator (accumulator).In concrete case study on implementation, motor is connected with accumulator by motor controller.When motor provides driving force, motor controller obtaining electric energy from accumulator, supply motor changes into mechanical energy；When car braking, motor controller controls motor reversion, works with generator forms, braking mechanical energy is recycled to accumulator.This method is different from traditional accumulator that is all recycled to by braking energy till accumulator electric-quantity is full, but by controlling the energy regenerating ratio of accumulator, in a planned way utilizes and recover energy, protect accumulator simultaneously.
As a kind of energy method of salary distribution, when car braking is set, it is recycled to storage battery energy ratio, this ratio B and accumulator electric-quantity SOC negative correlation.Namely accumulator SOC is more high, reclaims ratio more little, and the energy being recycled to accumulator is more few.For the irretrievable energy of accumulator, it is possible to reclaim for other electrical storage device in car or consume or directly abandon, in order to avoid super capacitor reclaims excessively causes waste, even damage super capacitor.
The relation further, it is possible to recovery ratio setting one-tenth and accumulator SOC are linearly successively decreased, such as Fig. 3.It is specially, according to practical situation, minimum and the highest electricity SOC1, the SOC2 that can reach when storage battery energy reclaims are set, maximum ratio and minimum scale B1, B2 of the energy regenerating of correspondence are set, by (B1, SOC1) and (B2, SOC2) line segment of determining be the recovery ratio of accumulator.Linear decrease relation is simplest negative correlativing relation between ratio B and accumulator electric-quantity SOC.More complicated data acquisition and processing (DAP) can also be passed through, when gathering different accumulator electric-quantity SOC, it is best suited for the ratio B of Battery recycling, obtain organizing voltage (SOC1, SOC2, SOC3 ...) and ratio (B1, B2, B3 ...) more, obtain Battery recycling ratio B by the mode of matching.
As the electric vehicle using this method, being provided with motor and connected motor controller, motor controller connects accumulator, and motor controller is connected to entire car controller.Arranging detecting device in accumulator, this detecting device can detect accumulator electric-quantity SOC, temperature etc..Detecting device for storage battery is connected with battery management device BMS or entire car controller.During brake, entire car controller receives brake signal, and first whether detection battery temp meets recovering condition, if temperature is too high does not meet recovering condition, then abandons utilizing Battery recycling energy；If battery temp meets recovering condition, obtain accumulator device electricity by detecting device, according to the recovery ratio B in implant controller (entire car controller or battery management device BMS), carry out energy regenerating.Causing that accumulator device electricity SOC is continually changing along with accumulator device recovers energy, the detection of above-mentioned battery temp and voltage should be in real time or carry out according to certain frequency, accurately to determine recovery ratio B.
The output of motor during braking can be rationally set, make electrical storage device reclaim braking energy reasonably to reclaim ratio.Wherein, Dual winding electric motor can reasonably arrange the power distribution of two windings, even makes the electrical storage device relevant from two windings reclaim braking energy with different recovery ratios respectively.
Claims (10)
1. an electric vehicle braking energy regenerating distribution method, described vehicle includes the motor, motor controller and the electrical storage device that are sequentially connected with；Vehicle braking energy is recycled to described electrical storage device by motor；The method includes: detect a certain parameter of described electrical storage device, and described electrical storage device reclaims braking energy ratio with this Parameters variation of electrical storage device.
2. electric vehicle braking energy regenerating distribution method according to claim 1, it is characterised in that described electrical storage device is power-type electrical storage device.
3. electric vehicle braking energy regenerating distribution method according to claim 2, it is characterised in that described electrical storage device is ultracapacitor, described parameter is the electricity of ultracapacitor or voltage or temperature.
4. Brake energy recovery distribution method according to claim 3, it is characterised in that the braking energy that described ultracapacitor once reclaims accounts for the ratio of this total braking energy and described ultracapacitor voltage negative correlation.
5. Brake energy recovery distribution method according to claim 4, it is characterised in that ultracapacitor reclaims the ratio of braking energy and successively decreases with described ultracapacitor pressure-wire.
6. electric vehicle braking energy regenerating distribution method according to claim 1, it is characterised in that described electrical storage device is energy type electrical storage device.
7. electric vehicle braking energy regenerating distribution method according to claim 6, it is characterised in that described electrical storage device is accumulator, described parameter is electricity or the temperature of accumulator.
8. electric vehicle braking energy regenerating distribution method according to claim 7, it is characterised in that the braking energy that described accumulator once reclaims accounts for the ratio of this total braking energy and described accumulator electric-quantity negative correlation.
9. Brake energy recovery distribution method according to claim 8, it is characterised in that the ratio of described Battery recycling braking energy is with described accumulator electric-quantity linear decrease.
10. Brake energy recovery distribution method according to claims 1 to 9, it is characterised in that described motor is Dual winding electric motor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610102095.7A CN105730249A (en) | 2016-02-25 | 2016-02-25 | Braking energy recovery and distribution method for electric vehicle |
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| CN201610102095.7A CN105730249A (en) | 2016-02-25 | 2016-02-25 | Braking energy recovery and distribution method for electric vehicle |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018119914A1 (en) * | 2016-12-29 | 2018-07-05 | 深圳配天智能技术研究院有限公司 | Brake energy feedback method and feedback system for electric vehicle, and vehicle |
| CN114148177A (en) * | 2020-09-04 | 2022-03-08 | 广汽埃安新能源汽车有限公司 | Automatic adjustment method and device for charging cut-off point |
-
2016
- 2016-02-25 CN CN201610102095.7A patent/CN105730249A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018119914A1 (en) * | 2016-12-29 | 2018-07-05 | 深圳配天智能技术研究院有限公司 | Brake energy feedback method and feedback system for electric vehicle, and vehicle |
| CN109311398A (en) * | 2016-12-29 | 2019-02-05 | 深圳配天智能技术研究院有限公司 | Braking energy feedback method, feedback system and the vehicle of electric vehicle |
| CN114148177A (en) * | 2020-09-04 | 2022-03-08 | 广汽埃安新能源汽车有限公司 | Automatic adjustment method and device for charging cut-off point |
| CN114148177B (en) * | 2020-09-04 | 2024-01-23 | 广汽埃安新能源汽车有限公司 | Automatic adjustment method and device for charging cut-off point |
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Application publication date: 20160706 |