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CN108162765A - The method for recovering brake energy of electric vehicle - Google Patents

The method for recovering brake energy of electric vehicle Download PDF

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Publication number
CN108162765A
CN108162765A CN201711454516.3A CN201711454516A CN108162765A CN 108162765 A CN108162765 A CN 108162765A CN 201711454516 A CN201711454516 A CN 201711454516A CN 108162765 A CN108162765 A CN 108162765A
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China
Prior art keywords
brake
braking
sliding block
accumulator
hydraulic
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CN201711454516.3A
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Chinese (zh)
Inventor
朱海燕
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Individual
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Individual
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Priority to CN201711454516.3A priority Critical patent/CN108162765A/en
Publication of CN108162765A publication Critical patent/CN108162765A/en
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  • Electric Propulsion And Braking For Vehicles (AREA)
  • Braking Arrangements (AREA)
  • Braking Systems And Boosters (AREA)

Abstract

The invention discloses a kind of method for recovering brake energy of electric vehicle, this control system includes:Hydraulic brake mechanism and with the matched brake coordination component of the hydraulic brake mechanism;When braking, the brake coordination component is suitable for generating the direction of motion opposite effect power with piston in hydraulic brake mechanism, while the electric energy that wheel drive motors braking is generated charges to accumulator by a boost module;The present invention is mutually coordinated with hydraulic braking force using the plugging power of wheel drive motors M when braking, reduces hydraulic brake pressure;It charges simultaneously to accumulator E.The present invention using mechanical structure realize motor braking power and hydraulic braking force in a certain range continuously, carry out cooperation adjusting in real time, structure is relatively easy, cost is greatly reduced and functional reliability significantly improves.

Description

The method for recovering brake energy of electric vehicle
Technical field
The present invention relates to electric vehicle brake technical fields, and in particular to a kind of Brake energy recovery side of electric vehicle Method.
Background technology
Currently, with energy-saving and environment-friendly pay attention to day by day, the use of electric vehicle gradually increases.Braking system is that automobile extremely closes One of important system.Traditional automobile brake generally using brake fluid system, can not achieve energy regenerating, and brake Piece frictional dissipation is very fast.At present, the braking system of electric vehicle in addition to some are using traditional brake fluid system, is also adopted The braking system of (or mixing) is combined with hydraulic braking with electric braking, one of main purpose is to utilize wheel driving when braking Motor charges the battery, energy saving to realize the recycling of energy.Such as Publication No. CN1986272A, entitled The Chinese patent literature of " electric vehicle combines braking control system and control method " discloses one kind and is acquired by sensor Signal and microcontroller calculate, corresponding to control proportioning valve output hydraulic pressure brake force, to realize the combination of electric braking and hydraulic braking;Again Such as the Chinese patent literature of Publication No. CN101913352A, entitled " coordinated braking control method of electric vehicle ", Its there is still a need for calculated by signal acquisition and microcontroller and etc. to realize the cooperation of electric braking and hydraulic braking;For another example it is public The number of opening is CN102310850A, the Chinese patent of entitled " braking system of electric car that can carry out Brake energy recovery " Document, it is still desirable to based on calculating and control of the microcontroller for the control of core.
It is above-mentioned that integrated control is mostly utilized for the control mode of the electric braking of electric vehicle and hydraulic braking in the prior art Device (or similar single chip machine controlling circuit etc.) processed obtains according to preset control logic, according to the judgement of the signal of sensor The time of control, the mode of control actuator work, the times or frequency of control etc. parameter, however associated actuator is carried out Control, whole process needs include acquire signal, judgement, calculating, execution and etc., need the regular hour in the process Delay, it is impossible to adjust the size of conventional hydraulic brake force in real time according to the size of motor braking power in real time;Moreover, the prior art In control process be required for meeting certain condition actuator just controlled to act, controlled again when meeting next condition actuator into Row acts in next step, and control process is to be interrupted, is discontinuous;In addition, its Control system architecture is relative complex, the electricity used Sub- component is more, and cost is more expensive and functional reliability reduces.
Invention content
The object of the present invention is to provide a kind of method for recovering brake energy used for electric vehicle, to realize to electric vehicle brake The recycling of energy.
In order to solve the above technical problem, the present invention provides a kind of method for recovering brake energy used for electric vehicle, including When braking, by the generation of brake coordination component and the direction of motion opposite effect power of piston in hydraulic brake mechanism, and together When by wheel drive motors braking generate electric energy charged by a boost module to accumulator.
When preferably, in order to be further implemented in brake, start brake coordination component;The braking energy used for electric vehicle Recovery method further includes:Brake assemblies, the brake assemblies are interior to be equipped with travel switch K;When braking, travel switch K is triggered, with Generate the active force.
Preferably, the hydraulic brake mechanism includes the interior master cylinder for setting the piston, and the piston passes through piston rod It is connected with brake assemblies.
Preferably, in order to preferably make brake assemblies coordinate brake coordination component operation;The brake assemblies include:It is two-sided Rack slide;The brake coordination component includes:Single-side rack sliding block;The lower face of the two-sided rack sliding block passes through driving cog Wheel assembly coordinates with brake pedal, engages a brake coordination gear between end face and the lower face of single-side rack sliding block thereon, should Brake coordination gear is connected with the end of the piston rod;During brake, brake pedal controls double cog by driving gear component Sliding block drives the rotation of brake coordination gear, and the brake coordination gear is suitable for through piston rod drive hydraulic brake mechanism to vehicle Wheel hub generates braking;And the brake coordination component acts power by single-side rack sliding block to brake coordination gear.
Preferably, the active force is generated by simple, reliable circuit structure;The brake coordination component further includes, Electromagnetic induction device, the battery sensing device are controlled by the auxiliary switch in the travel switch K;The electromagnetic induction device is fitted In after travel switch K is triggered, it is electric that auxiliary switch controls electromagnetic induction device to obtain, to generate the active force.
Preferably, the electromagnetic induction device includes:Electromagnetic coil, the electromagnetic coil are suitable for obtaining electric pull-core;It is described Iron core is connected with single-side rack sliding block, is suitable for when electromagnetic coil obtains electric, drives single-side rack sliding block to brake coordination gear Generate the active force.
Preferably, the brake coordination component further includes charging circuit, which is suitable for, in brake, wheel being driven The electric energy that dynamic motor braking generates charges to accumulator.
Preferably, in order to avoid after auxiliary switch disconnects, accumulator also keeps wheel drive motors driving effect;Institute It states charging circuit and includes diode;The anode of the accumulator is connected with one end of electromagnetic coil, the other end of the battery coil Be connected with the cathode of the diode, the anode of the diode is connected with the output terminal of boost module, the boost module it is defeated Enter end with wheel drive motors one end to be connected, the cathode of the accumulator is connected with the other end of wheel drive motors;It is described auxiliary Helping switch, the both ends of the normally closed switch are connected to the anode of the input terminal of boost module, accumulator for normally closed switch.
Preferably, the iron core sleeve is set in a hollow shell, and the electromagnetic coil is set around on the hollow shell periphery; One end of the iron core is connected by connecting rod with single-side rack sliding block, and the other end passes through compressed spring in the hollow shell With the inner wall of end resilient engagement of the hollow shell;The iron core carries a pair of of magnetic pole, this is suitable in electromagnetic coil magnetic pole It is electric after, make iron core to compressed spring direction move.
The invention has the advantages that the method for recovering brake energy used for electric vehicle of (1) present invention, can ensure two In the case that the braking resultant force of person meets automobile brake requirement, the rate of recovery of braking energy in braking process can be improved but also subtracted The loss of small conventional brake friction plate.(2) method for recovering brake energy used for electric vehicle of the invention, using mechanical structure reality Existing motor braking power and hydraulic braking force in a certain range continuously, carry out cooperation adjusting, mechanical structure phase in real time Simple, cost is greatly reduced and functional reliability significantly improves.(3) present invention can effectively improve vehicle by boost module Wheel drive motor is to the charge efficiency of accumulator.
Description of the drawings
The present invention is further described with reference to the accompanying drawings and examples.
Fig. 1 shows the structure diagram of the method for recovering brake energy used for electric vehicle of the present invention.
Fig. 2 shows the structural representations of second of embodiment of the brake energy recovering system used for electric vehicle of the present invention Figure.
In figure:Wheel hub 1;
Hydraulic brake mechanism 2, brake block 21, wheel cylinder 22, master cylinder 23, piston 24;
Brake assemblies 3, brake pedal 31, the first transfer gear 32, the second transfer gear 33, brake coordination gear 34, first is solid Determine guide rail 35, the two-sided rack sliding block 36, travel switch K;
Brake coordination component 4, second fixes guide rail 41, single-side rack sliding block 42, connecting rod 43, iron core 44, hollow shell 45, electricity Magnetic coil 46, compressed spring 47;
Wheel drive motors M, accumulator E, diode VD.
Specific embodiment
In conjunction with the accompanying drawings, the present invention is further explained in detail.These attached drawings are simplified schematic diagram, only with Illustration illustrates the basic structure of the present invention, therefore it only shows composition related to the present invention.
Embodiment 1
Fig. 1 shows the structure diagram of the method for recovering brake energy used for electric vehicle of the present invention.
As shown in Figure 1, a kind of method for recovering brake energy used for electric vehicle of the present invention, including:When braking, braking association Component 4 is adjusted to generate the direction of motion opposite effect power with piston 24 in hydraulic brake mechanism 2, and simultaneously by wheel drive motors The electric energy that M brakings generate charges to accumulator by a boost module.
Wherein, boost chip may be used to realize in the boost module, such as, but not limited to mc34063, ICL7660; The DC source boost module for example disclosed in patent document CN203933389U can also be used.
Specifically, the method for recovering brake energy used for electric vehicle further includes:Brake assemblies 3, in the brake assemblies 3 Equipped with travel switch K;When braking, travel switch K is triggered, to generate the active force.
The hydraulic brake mechanism 2 includes the interior master cylinder 23 for setting the piston 24, and the piston 24 passes through piston rod It is connected with brake assemblies 3.
As a kind of optional embodiment of this hydraulic brake mechanism, the hydraulic brake mechanism 2 further includes:It sets respectively In brake block 21 and wheel cylinder 22 on each wheel hub 1;The piston 24 generates hydraulic pressure (brake fluid pressure in master cylinder 23 Power), the hydraulic conduction to wheel cylinder 22 generates corresponding hydraulic braking force and acts on wheel hub 1 by brake block 21, to realize Brake.
The brake assemblies 3 include:The two-sided rack sliding block 36;The brake coordination component 4 includes:Single-side rack sliding block 42;The lower face of the two-sided rack sliding block 36 is coordinated by driving gear component and brake pedal 31, thereon end face and single side A brake coordination gear 34 is engaged between the lower face of rack slide 42, the end of the brake coordination gear 34 and the piston rod It is connected.Specifically, the two-sided rack sliding block 36 is mounted on the first fixation guide rail 35 and the first fixation guide rail 35 can be relied on to slide;With And single-side rack sliding block 42 is movably disposed on the second fixation guide rail 41, suitable for being slided on the second fixation guide rail 41.
When braking, brake pedal 31 controls the two-sided rack sliding block 36 to drive brake coordination gear by driving gear component 34 rotations, and the brake coordination gear 34 is suitable for hydraulic brake mechanism 2 being driven to generate braking to wheel hub 1 by piston rod;With And the brake coordination component 4 generates the active force by single-side rack sliding block 42 to brake coordination gear 34.
Wherein driving gear component includes:First, second transfer gear 33, first transfer gear 32 and brake pedal 31 are connected, and the braking instruction of brake pedal 31 passes sequentially through the first transfer gear 32, the second transfer gear 33, the two-sided rack sliding block 36 pass to brake coordination gear 34, and then move with piston 24, so as to generate hydraulic pressure in master cylinder 23, complete brake system It is dynamic.At the same time, since travel switch K is triggered, the active force acting in opposition that brake coordination component 4 generates is in brake coordination Gear 34 forces the hydraulic pressure value in master cylinder suitably to reduce, and reduces by the consumed kinetic energy that brakes, and the kinetic energy is driven by wheel Dynamic motor M brakings are converted into electric energy to store.
The brake coordination component 4 further includes, electromagnetic induction device, and the battery sensing device is by the travel switch K Auxiliary switch control;The electromagnetic induction device is suitable for after travel switch K is triggered, auxiliary switch control electromagnetic induction device Must be electric, to generate the active force.
The specific embodiment of the electromagnetic induction device includes:Electromagnetic coil 46, the electromagnetic coil 46 are suitable for obtaining electric suction Close iron core 44;The iron core 44 is connected with single-side rack sliding block 42, is suitable for, when electromagnetic coil 46 obtains electric, driving single-side rack Sliding block 42 generates the active force to brake coordination gear 34.
As a kind of optional embodiment of electromagnetic induction device, the iron core 44 is sheathed in a hollow shell 45, institute Electromagnetic coil 46 is stated to be set around on 45 periphery of hollow shell;It is slided by connecting rod 43 and single-side rack one end of the iron core 44 Block 42 is connected, and the other end passes through the inner wall of end of compressed spring 47 and the hollow shell 45 elasticity in the hollow shell 45 Cooperation;The iron core 44 carries a pair of of magnetic pole, this magnetic pole is suitable for electromagnetic coil 46 it is electric after, make iron core 44 to compressed spring 47 directions are moved, while the active force for acting in brake coordination gear 34 (with stepping on brake step on by opposition After plate 31, the active force that brake coordination gear 34 is passed to by the two-sided rack sliding block 36 is opposite).
As another optional embodiment of electromagnetic induction device, the iron core 44 is sheathed in a hollow shell 45, And positioned at the side of electromagnetic coil 46.
The brake coordination component 4 further includes charging circuit, which is suitable in brake, by wheel drive motors The electric energy that M brakings generate charges to accumulator E.
Specific embodiment:The charging circuit includes diode VD;The anode of the accumulator E and electromagnetic coil 46 One end be connected, the other end of the battery coil is connected with the cathode of the diode VD, the anode of diode VD and boosting The output terminal of module is connected, and the input terminal of the boost module is connected with wheel drive motors M one end, and the accumulator E's is negative Pole is connected with the other end of wheel drive motors M;The auxiliary switch is normally closed switch, and the both ends of the normally closed switch connect respectively The anode of input terminal, accumulator E in boost module.
The characteristics of by the one-way of diode VD, can effectively avoid accumulator E from continuing to lead to after normally closed switch opening Electromagnetic coil 46 is crossed to discharge to wheel drive motors M;And by the boost module, it can effectively improve charging effect Rate.
The operation principle of method for recovering brake energy used for electric vehicle of the present invention is:
During electric automobile during traveling, when driver does not touch on the brake pedal 31, auxiliary switch (normally closed switch) is closed, will be through It crosses electromagnetic coil 46 to be short-circuited, accumulator E supplies electric drive running car to wheel drive motors M;Iron core 44 is by compression bullet at this time 47 bullet of spring is to the side of hollow shell 45;
When driver steps on brake pedal 31, the braking instruction of brake pedal 31 passes sequentially through the first transfer gear 32, second Transfer gear 33, the two-sided rack sliding block 36 pass to brake coordination gear 34, and then are moved with piston 24, so that master cylinder Hydraulic pressure is generated in 23, completes skidding;Meanwhile auxiliary switch is opened, wheel drive motors M generates brake force and passes through charging Circuit charges to accumulator E, and charging current generates magnetic field when passing through electromagnetic coil 46 so that iron core 44 overcomes compressed spring 47 Elastic force moves right, and iron core 44 drives single-side rack sliding block 42 to move right by connecting rod 43 so that brake coordination gear 34 It rotates backward, 34 counter-rotating belts piston 24 of brake coordination gear moves right, so as to reduce the hydraulic pressure in master cylinder 23 (brake fluid pressure).
When driver steps on brake pedal 31, the brake force of vehicle is consequently exerted at brake force (the hydraulic pressure system on wheel hub 1 Motivation structure 2 generate hydraulic braking force) and wheel drive motors M generation brake force resultant force;When speed is faster, then wheel drives The stalling current generated in dynamic motor M is bigger, and motor braking power is bigger, and the suction that electromagnetic coil 46 generates is bigger, iron The displacement that core 44 moves is bigger, and for the oil pressure in master cylinder 23 with regard to smaller, hydraulic braking force is smaller, so as to work as automobile high-speed During braking, increase motor braking power, reduction by the conventional friction brake force of hydraulic braking, rub so as to reduce in conventional brake The abrasion of piece, while improve the rate of recovery of the wheel drive motors M to braking energy.
Optionally, in electric automobile during traveling, if brake coordination component 4 breaks down or accumulator E is in full power state When, wheel drive motors M charges and/or generates brake force without normal direction accumulator E, and electric vehicle is by hydraulic brake mechanism 2 at this time It is braked using conventional hydraulic mode of braking, ensures traffic safety.
Following table is the method for recovering brake energy used for electric vehicle of conventional hydraulic mode of braking and the present invention under each speed Braking distance test result.
From the table it is found that the method for recovering brake energy used for electric vehicle of the present invention was generated with conventional hydraulic mode of braking Braking effect is essentially identical, and therefore, the present invention is realized meets the situation of automobile brake requirement in the braking resultant force for ensureing the two Under, the rate of recovery of braking energy in braking process can be improved but also reduce the loss of conventional brake friction plate.
The brake energy recovering system used for electric vehicle of the present invention, makes electric braking force and hydraulic braking force by mechanical structure It is continuously adjusted in real time in a certain range, controller in the prior art is omitted or single chip circuit calculates control and sentences Disconnected process, thus it coordinates the timeliness of braking more preferably.
Embodiment 2
Fig. 2 shows the structure diagrams of second of embodiment of brake energy recovering system used for electric vehicle.
As shown in Fig. 2, the single-side rack sliding block in the brake coordination component can also be driven by leading screw and be moved left and right To replace electromagnetic induction device, concrete scheme includes:
The leading screw is driven by motor, which is controlled by a MCU module, and the MCU module is acquired by Hall sensor The current value that wheel drive motors M brakings generate adjusts the displacement of single-side rack sliding block to control Motor torque.
Using above-mentioned desirable embodiment according to the present invention as enlightenment, by above-mentioned description, relevant staff is complete Various changes and amendments can be carried out without departing from the scope of the technological thought of the present invention' entirely.The technology of this invention Property range is not limited to the content on specification, it is necessary to determine its technical scope according to right.

Claims (1)

1. a kind of method for recovering brake energy used for electric vehicle, which is characterized in that
When braking, by brake coordination component generate with hydraulic brake mechanism in piston direction of motion opposite effect power, And the electric energy that wheel drive motors braking generates charges to accumulator by a boost module simultaneously;
The electric vehicle includes:Brake assemblies, the brake assemblies are interior to be equipped with travel switch K;
When braking, travel switch K is triggered, to generate the active force;The hydraulic brake mechanism sets the piston in including Master cylinder, the piston is connected by piston rod with brake assemblies;
The brake assemblies include:The two-sided rack sliding block;The brake coordination component includes:Single-side rack sliding block;
The lower face of the two-sided rack sliding block is coordinated by driving gear component and brake pedal, thereon end face and single-side rack A brake coordination gear is engaged between the lower face of sliding block, which is connected with the end of the piston rod;
During brake, brake pedal controls the two-sided rack sliding block that brake coordination gear is driven to rotate by driving gear component, and should Brake coordination gear is suitable for hydraulic brake mechanism being driven to generate braking to wheel hub by piston rod;And the brake coordination group Part acts power by single-side rack sliding block to brake coordination gear;
The single-side rack sliding block is driven by leading screw to move left and right, and leading screw is driven by motor, and the motor is by a MCU module Control, the current value that the MCU module is generated by Hall sensor collecting vehicle wheel drive motor braking to control Motor torque, And then adjust the displacement of single-side rack sliding block;
The brake coordination component further includes charging circuit, which is suitable for, in brake, wheel drive motors being braked The electric energy of generation charges to accumulator;
The charging circuit includes diode;
The anode of the accumulator is connected with one end of electromagnetic coil, the cathode of the other end of the battery coil and the diode It is connected, the anode of the diode is connected with the output terminal of boost module, the input terminal and wheel drive motors of the boost module One end is connected, and the cathode of the accumulator is connected with the other end of wheel drive motors;
The auxiliary switch is normally closed switch, and the both ends of the normally closed switch are connected to the input terminal of boost module, accumulator Anode.
CN201711454516.3A 2014-12-30 2014-12-30 The method for recovering brake energy of electric vehicle Withdrawn CN108162765A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711454516.3A CN108162765A (en) 2014-12-30 2014-12-30 The method for recovering brake energy of electric vehicle

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CN201410844011.8A CN104859461B (en) 2014-12-30 2014-12-30 Method for recovering brake energy used for electric vehicle
CN201711454516.3A CN108162765A (en) 2014-12-30 2014-12-30 The method for recovering brake energy of electric vehicle

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CN109291800A (en) * 2018-09-28 2019-02-01 上汽通用五菱汽车股份有限公司 The braking equipment and electric car of electric car
CN110077238A (en) * 2019-04-22 2019-08-02 大连理工大学 A method of improving the braking energy of electric automobiles rate of recovery

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CN106183835B (en) * 2016-07-13 2019-02-12 纳恩博(北京)科技有限公司 A kind of vehicle electric energy recovery method, device and electric vehicle
CN108621698B (en) * 2018-06-13 2024-07-05 南京三方化工设备监理有限公司 Slope resistance adjusting device
CN108840204B (en) * 2018-08-04 2023-09-19 安徽理工大学 Energy recovery assembly for mine hoist during braking

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Publication number Priority date Publication date Assignee Title
CN109291800A (en) * 2018-09-28 2019-02-01 上汽通用五菱汽车股份有限公司 The braking equipment and electric car of electric car
CN110077238A (en) * 2019-04-22 2019-08-02 大连理工大学 A method of improving the braking energy of electric automobiles rate of recovery

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CN108032736A (en) 2018-05-15
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Application publication date: 20180615

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