CN202513629U - Capacitor charging-discharging control device for electric automobiles - Google Patents

Capacitor charging-discharging control device for electric automobiles Download PDF

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Publication number
CN202513629U
CN202513629U CN2012201250424U CN201220125042U CN202513629U CN 202513629 U CN202513629 U CN 202513629U CN 2012201250424 U CN2012201250424 U CN 2012201250424U CN 201220125042 U CN201220125042 U CN 201220125042U CN 202513629 U CN202513629 U CN 202513629U
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CN
China
Prior art keywords
directional
triple
super capacitor
current sensor
intersecting
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Expired - Lifetime
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CN2012201250424U
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Chinese (zh)
Inventor
李廷勇
徐长勤
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QINGDAO EASYTOUSE ELECTRONICS CO Ltd
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QINGDAO EASYTOUSE ELECTRONICS CO Ltd
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Priority to CN2012201250424U priority Critical patent/CN202513629U/en
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/70Energy storage systems for electromobility, e.g. batteries
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/80Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
    • Y02T10/92Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles

Abstract

The utility model belongs to the technical field of automobile energy-saving equipment, and relates to a capacitor charging-discharging control device for electric automobiles. The upper end of an ultra-capacitor module is connected with a current sensor in series, and then the lower end of the ultra-capacitor module and the current sensor are connected with a voltage sensor in parallel. A switch, a current sensor and a release resistor are connected in series, and then are connected with the voltage sensor in parallel. Core components of triple intersecting bi-directional direct current (DC)/DC convertor are six control switching tubes, each unit of triple intersecting bi-directional DC/DC works respectively in intersecting mode in the same period, and the working phase difference is 120 degrees. Units of the triple intersecting bi-directional DC/DC are integrated to form a circuit structure of the triple intersecting bi-directional DC/DC convertor, and a parallel-connection forward-direction boost output end of intersecting working of the circuit structure is connected with a filtering capacitor which is used for reducing output ripples. The voltage sensor detects the busbar voltage, the current sensor detects output current of the triple intersecting bi-directional DC/DC convertor, and therefore charging-discharging operation of the output ultra-capacitor module is controlled. The capacitor charging-discharging control device for electric automobiles is reasonable in circuit structure, safe and reliable to use, and long in service life.

Description

A kind of used for electric vehicle capacitor charge and discharge control device
Technical field:
The utility model belongs to the vehicle energy saving equipment technical field, and the environment-friendly type drive controlling formula super capacitor regenerating braking energy that relates to a kind of used for electric vehicle reclaims and utilize system, particularly a kind of used for electric vehicle capacitor charge and discharge control device.
Background technology:
Traditional electric automobile causes the continuous variation of its power demand curves easily in frequent starting, climbing and braking procedure, all the more so under the operating mode of urban road.Usually, the peak power of a high performance electric automobile can reach 16: 1 with the ratio of average power, but the characteristics of these peak powers are that the duration is generally all shorter, and the energy of demand is not high.For pure electric automobile, this just means or vehicle dynamic quality is not enough, or will often bear big peak current on the voltage bus, and this can damage the life-span of battery undoubtedly; If but used the bigger super capacitor of power ratio, when instantaneous power demands is big, peak power would be provided by super capacitor; And when feedback braking, absorb peak power; Just can alleviate pressure, thereby can increase starting, the power output of system when quickening, and can reclaim powerful braking energy efficiently battery; Can also improve the useful life of storage battery, improve its discharge performance.
At present, one of key factor of restriction electric automobile wide popularization and application is that its continuation of the journey mileage is short, and how making full use of the electric automobile regenerating braking energy is energy savings and the key that improves electric automobile continuation of the journey mileage.Regeneration brake system on the domestic traditional electric automobile all is when car brakeing; Make machine operation in generating operation mode; Kinetic energy or gravitional force is converted into electric energy is out-of-control directly to feed back in the storage battery, is used by the storage battery heavy-current discharge again during starting.The major defect of this technical scheme can make the big continually electric current charge and discharge of storage battery when being frequent braking of vehicle and starting, because super-charge super-discharge causes certain loss to battery, influences the life-span of battery; In addition, battery is as unique power supply of electric motor car, and when vehicle quickened or climbs, battery is understood heavy-current discharge, and was unfavorable to the life-span of battery.Super capacitor is a kind of novel energy-storing device that Recent study develops, and the capacitance of this super capacitor is far longer than common electric capacity, can reach several thousand even tens thousand of farad at present, all has shaped article to use both at home and abroad; Moreover the energy storage effect of super capacitor is promoted the use of in subway train, the also granted at home related patent U.S. Patent No. of the applicant.Different with subway is; The single carrier that subway train only stores as regenerating braking energy with super capacitor; And the carrier of energy storage is two kinds during the electric automobile regenerative braking of this programme, and promptly storage battery and super capacitor play the braking energy absorption simultaneously, and super capacitor has characteristics such as dynamic response is good, power density is big, the life-span is long; Be suitable for the instantaneous high-power occasion that discharges and recharges, just and during charge in batteries dynamic response poor, require characteristics such as constant current constant voltage to form complementation; So, inquire into that a kind of to utilize super capacitor to store the energy of electric automobile in braking procedure and utilize effectively again be very promising technical scheme.
Summary of the invention:
The goal of the invention of the utility model is to overcome the shortcoming that prior art exists; Seek to design a kind of electric automobile that is applied to; Utilize the super capacitor store electrical energy and discharge electric energy; Realize the control technology scheme of effectively storage and discharge power supply, its device adopts modern power electronics technology principle and combination of devices to form, and can be assemblied in realization energy-storage economical effect on the traditional electric automobile.
To achieve these goals; The utility model is to the defective and the deficiency of being carried out the technology existence of regenerating braking energy recovery separately by storage battery; Design and provide a kind of electric automobile super electric capacity regenerating braking energy stocking system; On the basis that storage battery stores the electric automobile regenerating braking energy, increase by one group of carrier that stores as regenerating braking energy with the super capacitor module, super capacitor module and charge-discharge control system thereof and storage battery form energy and supply with and store complementary; Storage battery provides electric automobile to move required most of energy with average power at ordinary times; When damped condition; The electric automobile regenerative braking is stored in the super capacitor through charging-discharging controller with the peak power feedback energy, and when vehicle launch, acceleration and climbing, the super capacitor charging-discharging controller discharges the form of energy stored in the super capacitor module with the big electric current of moment high-energy; Parallelly connectedly with storage battery supply power, with the demand that satisfies the electric automobile starting and quicken to motor in electric automobile.
The capacitor charging/discharging controling circuit structure that the utility model relates to comprises super capacitor module Cn (wherein n and m are the positive integer greater than 2), six current sensor SA1-SA6, voltage sensor SV1 and SV2, release resistance R n, K switch M1, filter capacitor C0 and one group of triple staggered bi-directional (DC/DC) DC converters that n * m super capacitor connection in series-parallel forms; Behind the upper end series current transducer SA1 of super capacitor module Cn with the lower end and be connected with voltage sensor SV1; K switch M1 connects back parallelly connected with voltage sensor SV1 with current sensor SA6 and release resistance R n; The core parts of triple staggered bi-directional DC/DC converters are 6 control switch pipes (IGBT) S1-S6, wherein first heavily for control switch pipe (IGBT) S1 and S2 tie point be connected to voltage sensor SV1 after inductance L 1, the current sensor SA3 of series connection are connected on composition; Second heavily forms for control switch pipe S3 is connected to voltage sensor SV1 upper end with S4 tie point and the inductance L of connecting 2, current sensor SA4 hyphen; The triple for control switch pipe S5 and S6 tie point be connected to voltage sensor SV1 after inductance L 3, the current sensor SA5 of series connection are connected on composition; The staggered respectively work in of each heavy unit of triple staggered bi-directional DC/DC with one-period, the work phase difference is 120 degree; S1 and S2 are operated in the 0-120 degree; S3 and S4 are operated in the 120-240 degree, and S5 and S6 are operated in the 240-360 degree, the triple staggered bi-directional DC/DC converter circuit structures of synthetic composition; The parallelly connected forward of its staggered work output that boosts is connected to filter capacitor C0, is used to reduce output ripple; Voltage sensor SV2 detects busbar voltage, and current sensor SA2 detects triple staggered bi-directional DC/DC converter output currents, with the operation that discharges and recharges of control output super capacitor module Cn.
The utility model with the DC/DC converter design of super capacitor charging-discharging controller in discontinuous conducting (DCM) pattern; The inductance value of the inductance coil that converter is used reduces; Its cost is to have increased current ripples, adopts multipleization cross structure then to reduce current ripples, quasi-complement this deficiency; And the purpose that it increases dynamic response, the realization that helps braking, starting peak regulating function have been reached.
The two-way DC/DC converter of triple alternating expressions that the utility model adopts is based on the two-way DC/DC topological structure of typical half bridge formula; Three basic half-bridge conductings are spent the time successively or wrong 1/3 cycle, and identical at each cycle ON time, so also wrong 1/3 cycle mutually successively of inductive current, reduce the ripple of total current then.
The utility model compared with prior art has the following advantages: the one, by super capacitor store electricity motor-car regenerative braking feedback energy; Avoid the adverse effect of frequent charge and discharge to electric car power supply; Because super capacitor useful life, the life-span of electric vehicle power sources system was improved greater than storage battery; The 2nd, when vehicle quickened and climb, super capacitor assisted main power source to motor peak energy to be provided, and the discharging current of storage battery is descended, thereby the life-span of storage battery is improved; The 3rd, the super capacitor power density is big, dynamic response good, and the discharging current that vehicle can be very big when quickening is assisted the main power source power supply, and the acceleration performance of electric automobile is improved; The 4th, do not need former control system of electric automobile is changed on principle and structure, the operative sensor output signal used former control system connects charging-discharging controller, can improve by technical application.
Description of drawings:
The charging-discharging controller circuit structure theory diagram that Fig. 1 relates to for the utility model.
Triple staggered bi-directional transformer configuration principle schematic that Fig. 2 relates to for the utility model.
Fig. 3 realizes discharging and recharging the workflow schematic block diagram of control for the utility model.
Fig. 4 is the agent structure schematic block diagram of the utility model controlled device.
Embodiment:
Below through embodiment and combine accompanying drawing to be described further.
Embodiment:
Present embodiment comprises storage battery 1, driving governor 2, motor 3, super capacitor charging-discharging controller 4, super capacitor module 5 and cable bus 6, and each parts is communicated with the formation energy accumulating device by the mutual electrical information of electrical principles; Cn is the super capacitor module, and SA1~SA6 is a current sensor, and SV1~SV2 is a voltage sensor, and Rn overcomes the big defective of current ripples for releasing ability resistance through multiple inverter configuration, has obtained the good characteristics of power density high dynamic response.Rn is as absorption resistance when the super capacitor module completely charges, and Rn releases ability resistance when the super capacitor module need be safeguarded; The output voltage stabilization of regulating the super capacitor module through outer voltage PI during driving governor work is in loading range; Improve the peak regulation stability; PI adjusting through to every phase current is charged to super capacitor with controlled manner, improves the dynamic property of system, has reduced ripple and has avoided the infringement to the super capacitor module; Each elementary cell converter has independently pulse width modulation (PWM) generating module, whole converter paralysis when avoiding certain unit to break down; Ux is the super capacitor module initial busbar voltage of discharging, and Ucx is a super capacitor module minimum voltage, and Us is the super capacitor module initial busbar voltage of charging, and Ucs is the ceiling voltage of super capacitor module; Each super capacitor module all is furnished with pressure module, voltage detection module, temperature detecting module; And have a CAN bus communication interface; The super capacitor charging-discharging controller is patrolled and examined the voltage and the temperature of each module in real time, when excess temperature, overvoltage occurring, reports to the police and protects.
Present embodiment is set up the super capacitor storage device of regenerating brake energy on former Control of Drive for EV system-based; This device is that main body constitutes by super capacitor module and charging-discharging controller thereof, and triple staggered bi-directional DC/DC converters and auxiliary inductance thereof and current sensor are formed the main body of super capacitor charging-discharging controller; The super capacitor module is added some groups of parallel connections the equal pressing system of resistance and is formed module again, referring to Fig. 5 by one group of the monomer series-connected one-tenth of several super capacitors; Confirm every group of super capacitor monomer number of connecting according to the rated voltage of motor, how many energy of storage disposes the group number of parallelly connected super capacitor as required; In charging-discharging controller, be provided with control circuit board and bidirectional, dc (DC/DC) converter; Control circuit board is connected with main power voltage transducer, mains current transducer, electric moter voltage transducer, motor current sensor, super capacitor voltage sensor, super capacitor current sensor, gas pedal drive potential device and brake pedal stopping potential device through interface circuit; Two-way, step-up/step-down circuit that triple staggered boost of bidirectional, dc (DC/DC) converter using and buck circuit are formed, as shown in Figure 4; Control circuit board is provided with microprocessor, and microprocessor adopts DSP, gathers voltage and current signal, accelerator pedal and brake pedal signal through filter circuit; The pwm signal of DSP output is through the action of photoelectric isolating device and each power device of driving governor circuit control bidirectional, dc (DC/DC) converter; Filter circuit adopts the filter circuit of typically being built by operational amplifier; Photoelectric isolating circuit is realized by optocoupler; The required various level of super capacitor charging-discharging controller are provided through common DC/DC Switching Power Supply by power taking on the storage battery of main power source.
Present embodiment is discontinuous conducting (DCM) pattern with bidirectional, dc (DC/DC) converter design of super capacitor charging-discharging controller; Because of the little current ripples that increased of the used inductance value of converter; Adopt multiple inverter configuration to reduce current ripples; And increased its dynamic response capability, help braking, starting the realization of peak regulating function.
The two-way DC/DC converter of triple alternating expressions that present embodiment adopts is based on the two-way DC/DC topological structure of typical half bridge formula; The half-bridge ON time successively or wrong 1/3 cycle, and is and identical at each cycle ON time, and inductive current is wrong 1/3 cycle mutually successively, to reduce the total current ripple.
When the super capacitor module of present embodiment discharges; When being electric automobile starting, accelerating mode is the forward booste operation; This moment, half-bridge control switch pipe S2, S4 and S6 were in the copped wave state down, were main switch, and last half-bridge control switch pipe S1, S3 and S5 are respectively with complementary with half-bridge control switch pipe under the arm; Be auxiliary switch, the super capacitor energy stored flows to the automobile voltage bus through boosting; During the charging of super capacitor module; Be that the regenerative braking operating mode is reverse brownout operation; Half-bridge switch control valve S1, S3 and S5 are in the copped wave state on this moment, are main switch, following half-bridge switch control valve S2, S4 and S6 and complementary with half-bridge switch control valve on the arm respectively; Be auxiliary switch, this moment, regenerating braking energy flowed to super capacitor for its charging through step-down; For each elementary cell dynamic response of making triple staggered bi-directional reconfiguration devices good; Add the current inner loop negative feedback respectively; Each elementary cell converter of control has independently pulse width modulation (PWM) module after proportional integral (PI) is regulated, and a shared outer voltage guarantees the monolithic stability of system.

Claims (1)

1. used for electric vehicle capacitor charge and discharge control device; It is characterized in that circuit structure comprises the super capacitor module Cn that n * m super capacitor connection in series-parallel forms; Wherein n and m are the positive integer greater than 2, six current sensor SA1-SA6, voltage sensor SV1 and SV2, release resistance R n, K switch M1, filter capacitor C0 and one group of triple staggered bi-directional DC converter; Behind the upper end series current transducer SA1 of super capacitor module Cn with the lower end and be connected with voltage sensor SV1; K switch M1 connects back parallelly connected with voltage sensor SV1 with current sensor SA6 and release resistance R n; The core parts of triple staggered bi-directional DC/DC converters are 6 control switch pipe S1-S6, wherein first heavily for control switch pipe S1 and S2 tie point be connected to voltage sensor SV1 after inductance L 1, the current sensor SA3 of series connection are connected on composition; Second heavily forms for control switch pipe S3 is connected to voltage sensor SV1 upper end with S4 tie point and the inductance L of connecting 2, current sensor SA4 hyphen; The triple for control switch pipe S5 and S6 tie point be connected to voltage sensor SV1 after inductance L 3, the current sensor SA5 of series connection are connected on composition; The staggered respectively work in of each heavy unit of triple staggered bi-directional DC/DC with one-period, the work phase difference is 120 degree; S1 and S2 are operated in the 0-120 degree, and S3 and S4 are operated in the 120-240 degree, and S5 and S6 are operated in the 240-360 degree, synthetic form triple staggered bi-directional DC/DC converter circuit structures, and the parallelly connected forward of its staggered work output that boosts is connected to filter capacitor C0; Voltage sensor SV2 detects busbar voltage, and current sensor SA2 detects triple staggered bi-directional DC/DC converter output currents.
CN2012201250424U 2012-03-29 2012-03-29 Capacitor charging-discharging control device for electric automobiles Expired - Lifetime CN202513629U (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102624056A (en) * 2012-03-29 2012-08-01 青岛易特优电子有限公司 Charge-discharge control device for electric automobile capacitor
CN103253143A (en) * 2013-05-16 2013-08-21 哈尔滨理工大学 Instantaneous power control and energy storage method of electric automobile regenerative braking
CN103647500A (en) * 2013-12-31 2014-03-19 哈尔滨工业大学 Motor speed-regulation system energy-saving controller based on super-capacitor energy storage and control method
CN106154167A (en) * 2015-05-15 2016-11-23 硕天科技股份有限公司 There is the battery sensor of addressing mode and sense mode

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102624056A (en) * 2012-03-29 2012-08-01 青岛易特优电子有限公司 Charge-discharge control device for electric automobile capacitor
CN103253143A (en) * 2013-05-16 2013-08-21 哈尔滨理工大学 Instantaneous power control and energy storage method of electric automobile regenerative braking
CN103647500A (en) * 2013-12-31 2014-03-19 哈尔滨工业大学 Motor speed-regulation system energy-saving controller based on super-capacitor energy storage and control method
CN106154167A (en) * 2015-05-15 2016-11-23 硕天科技股份有限公司 There is the battery sensor of addressing mode and sense mode
CN106154167B (en) * 2015-05-15 2018-11-02 硕天科技股份有限公司 Battery sensor with addressing mode and sense mode

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Granted publication date: 20121031