CN106549453A - A kind of method that charging system former limit regulates and controls charging current - Google Patents
A kind of method that charging system former limit regulates and controls charging current Download PDFInfo
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- CN106549453A CN106549453A CN201611128960.1A CN201611128960A CN106549453A CN 106549453 A CN106549453 A CN 106549453A CN 201611128960 A CN201611128960 A CN 201611128960A CN 106549453 A CN106549453 A CN 106549453A
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- Prior art keywords
- signal
- primary current
- charging
- current
- voltage
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
Abstract
The invention discloses a kind of method that charging system former limit regulates and controls charging current, the method includes：Detection primary current, and generate the first signal being directly proportional to primary current；Step voltage before detection, and generate the secondary signal being directly proportional to front step voltage；The charging voltage of automobile batteries is obtained, and generates the 3rd signal being directly proportional to charging voltage；According to the first signal, secondary signal and the 3rd signal, Regulate signal is adjusted and is generated to primary current error to the switching tube drive module, the switching tube drive module drives the switching tube according to the Regulate signal.The method that charging system former limit disclosed by the invention regulates and controls charging current, the secondary signal being directly proportional to front step voltage by the first signal being directly proportional to primary current and the 3rd signal being directly proportional to charging voltage, primary current error is adjusted, the detection to charging current and feedback control simple and safe can be reliably achieved.
Description
Technical field
The present invention relates to power technique fields, more particularly to a kind of method that charging system former limit regulates and controls charging current.
Background technology
With the policy execution of 13 Planning Support emerging strategic industries, and GB《GB-T27930-2015 is electric
Communication protocol between the off-board conduction-type charger of electrical automobile and battery management system》Issue, electric automobile and its charging pile
Industry flourishes.
Charging technique is one of key technology of Development of Electric Vehicles.It is first to be rectified into directly the alternating current of AC network
Stream electricity, then through the links such as high frequency transformer isolated variable, filtering high-frequency rectifier, the direct current being converted into needed for set of cells charges
Output.Need between charging pile and battery management system, to carry out real-time information interaction in charging process, interactive content can be
The voltage of cell, temperature, total voltage and charging current, state-of-charge (State of Charge, SOC), health status
(State of Health, SOH) etc..Wherein charging current is to ensure that charging performance, battery life and reliable and secure important letter
Breath, will not only interact confirmation in charging process, be also performed to real-time detection and feedback control.
Prior art typically detects the scheme of electric current and feedback regulation using secondary, i.e., detect secondary using current sensor
The electric current of (i.e. the charged side of changer), current signal isolation is fed back to former limit by photoelectrical coupler, and (i.e. changer is inverse
Become side), then regulating error is carried out with required setting charging current value, control the charging current shape needed for changer runs on
State.In the program, current sensor detection is secondary charging current, it is necessary to which isolation feeds back to former limit and could realize that error regulates and controls；
Circuit complexity in scheme, high cost；And due to the service life of photoelectrical coupler it is shorter, and exist be dielectrically separated from what is punctured
Hidden danger, the reliability and safety for causing the program are had a greatly reduced quality.Therefore, how simply, reliably and securely to realize charging current
Detection and feedback control, be badly in need of solve technical problem.
The content of the invention
Present invention is primarily targeted at proposing a kind of method that charging system former limit regulates and controls charging current, it is intended to solve such as
What simply, reliably and securely realizes detection and the feedback control of charging current.
For achieving the above object, embodiment of the present invention first aspect provides a kind of charging system former limit regulation and control charging current
Method, the charging system include front level power supply, changer, transformator, output loop and the automobile batteries being sequentially connected, described
Changer includes switching tube and switching tube drive module；Methods described includes：
Detection primary current, and generate the first signal being directly proportional to primary current；
Step voltage before detection, and generate the secondary signal being directly proportional to front step voltage；
The charging voltage of automobile batteries is obtained, and generates the 3rd signal being directly proportional to charging voltage；
According to first signal, the secondary signal and the 3rd signal, primary current error is adjusted
And Regulate signal is generated to the switching tube drive module, the switching tube drive module is according to the Regulate signal drives
Switching tube.
With reference to the embodiment of the present invention in a first aspect, in the first implementation of the first aspect of the embodiment of the present invention,
It is described that primary current error is adjusted including：PID regulations are carried out to primary current error.
With reference to the embodiment of the present invention in a first aspect, in second implementation of the first aspect of the embodiment of the present invention,
It is described that primary current error is adjusted including：By neural network algorithm or wavelet function algorithm or fuzzy control
Algorithm is adjusted to primary current error.
With reference to the embodiment of the present invention in a first aspect, in the third implementation of the first aspect of the embodiment of the present invention,
Calculated according to below equation (Ip、△Ip), then PID regulations are carried out to primary current error：
Wherein,For need charging current,For the primary current for needing, IpFor primary current, △ IpFor primary current
Error, conversion efficiencies of the η for charging system prime to rear class, K1For primary current amplification coefficient, RsFor current sensor ratio system
Number；K2For prime voltage amplification coefficient, K3For charging voltage amplification coefficient, S1For the first signal, S2For secondary signal, S3For the 3rd
Signal.
Automobile batteries charging system provided in an embodiment of the present invention and its control method, by what is be directly proportional to primary current
Secondary signal and the 3rd signal being directly proportional to charging voltage that first signal is directly proportional to front step voltage, to primary current
Error is adjusted, and simple and safe can be reliably achieved the detection to charging current and feedback control；Relative to prior art
For, secondary current detection and process circuit are eliminated, is eliminated and the safety that feedback device is brought is isolated by photoelectrical coupler etc.
Risk.
Description of the drawings
Charging system structural representations of the Fig. 1 for the embodiment of the present invention；
Charging system PID adjustment structure schematic diagrams of the Fig. 2 for the embodiment of the present invention；
Method flow schematic diagrams of the Fig. 3 for the charging system former limit regulation and control charging current of the embodiment of the present invention.
The realization of the object of the invention, functional characteristics and advantage will be described further in conjunction with the embodiments referring to the drawings.
Specific embodiment
It should be appreciated that specific embodiment described herein is not intended to limit the present invention only to explain the present invention.
Each embodiment of the invention is realized referring now to Description of Drawings.In follow-up description, using for representing
, only for being conducive to the explanation of the present invention, itself is not special for the suffix of such as " module ", " part " or " unit " of element
Fixed meaning.
Charging system structural representations of the Fig. 1 for the embodiment of the present invention, the charging system include the prime electricity being sequentially connected
Source 1, changer 2, transformator 3, output loop 4 and automobile batteries 5.
In the present embodiment, front level power supply 1 is DC source, for providing direct current input for changer 2.Front level power supply 1
Can be the DC source or other DC sources after commercial power rectification, be not limited thereto.
Changer 2 includes switching tube Q1 and Q2, and switching tube Q1 and Q2 composition semi-bridge inversion switching tube circuit is opened by conducting
Pipe Q1 and Q2 are closed, will can be exported to transformator 3 after the DC source inversion of front level power supply 1.Further, switching tube Q1 and
The two ends of semi-bridge inversion switching tube circuit of Q2 compositions can be in parallel with capacitance group, the capacitance group include the electric capacity Cs1 that connects with
Cs2, the electric capacity Cs1 and Cs2 of series connection is mainly for the protection of switching tube Q1 and Q2.It should be noted that the electric capacity in capacitance group,
In other embodiment, can be in parallel or series-parallel system.Also, it should be noted that changer 2 to be not limited to Fig. 1 this kind of
Form, such as changer 2 can be full-bridge inverting switching tube circuit etc..
In the present embodiment, switching tube includes but is not limited to mos field effect transistor, insulated gate pair
Bipolar transistor.
Transformator 3 is high frequency transformer, using magnetic principles transmission energy, can effectively reduce the volume of charging system.Become
Alternating current power supply after 2 inversion of changer can be converted to pulse voltage by depressor 3, and export to output loop 4.
In the present embodiment, output loop 4 may include commutating circuit and filter circuit.Output loop 4 can will be transformator 3 defeated
The pulse voltage for going out is converted into DC voltage, after link after filtering, filter into smooth direct current electric current and enter automobile batteries.
Refer again to shown in Fig. 1, in the present embodiment, charging system also includes primary current detection module 21, prime electricity
Pressure detection module 22, voltage feedback module 23, adjustment module 24 and switching tube drive module 25；Switching tube drive module 25 is used for
Switching tube Q1 and Q2 in driving transducer 2.
Primary current detection module 21, for detecting primary current, and generates the first signal being directly proportional to primary current
To adjustment module 24.
In the present embodiment, primary current detection module 21 may include current sensor RsWith current filtering amplifying return circuit.
Current sensor, for detecting primary current Ip。
Current filtering amplifying return circuit, for the primary current I detected to current sensorpAmplification is filtered, and it is raw
Into with primary current IpThe first signal being directly proportional is to adjustment module 24.
Prime voltage detection module 22, for detecting front step voltage Vd, and generate and front step voltage VdThe second letter being directly proportional
Number give adjustment module 24；
Voltage feedback module 23, for obtaining charging voltage V of automobile batterieso, and generate and charging voltage VoIt is directly proportional
3rd signal is to adjustment module 24；
Adjustment module is adjusted and is given birth to primary current error according to the first signal, secondary signal and the 3rd signal
Into Regulate signal to switching tube drive module 25, switching tube drive module 25 is according to Regulate signal driving switch pipe Q1 and Q2.
With reference to Fig. 3, Fig. 3 is that a kind of charging system former limit regulation and control based on shown in Fig. 1 that the embodiment of the present invention is proposed are charged
The method of electric current, the method comprising the steps of：
101st, primary current is detected, and generates the first signal being directly proportional to primary current.
In the present embodiment, primary current I can be detected by current sensorp.Current filtering amplifying return circuit pair can be passed through
The primary current I that current sensor is detectedpAmplification is filtered, and is generated and primary current IpThe first signal being directly proportional
102nd, step voltage before detecting, and generate the secondary signal being directly proportional to front step voltage.
In the present embodiment, front step voltage V can be detected by prime voltage detection module 22d, and generate and front step voltage Vd
The secondary signal being directly proportional
103rd, the charging voltage of automobile batteries is obtained, and generates the 3rd signal being directly proportional to charging voltage.
In the present embodiment, charging voltage V of automobile batteries can be obtained by voltage feedback module 23o, and generate and fill
Piezoelectric voltage VoThe 3rd signal being directly proportional
104th, according to the first signal, secondary signal and the 3rd signal, tune is adjusted and is generated to primary current error
Section signal gives switching tube drive module, and switching tube drive module is according to Regulate signal driving switch pipe.
In the present embodiment, can be by adjustment module according to the first signal, secondary signal and the 3rd signal, to former limit electricity
Stream error is adjusted and generates Regulate signal to switching tube drive module 25, and switching tube drive module 25 is driven according to Regulate signal
Dynamic switching tube Q1 and Q2.
In the present embodiment, primary current error is adjusted including：PID regulations are carried out to primary current error.
Specifically, refer to shown in Fig. 2：
Current sensor RsAccess in primary circuit, the primary current I which detectspAfter current filtering amplifying return circuit,
Output and primary current IpThe signal S being directly proportional1(wherein, S1=K1·Rs·Ip) to adjustment module.Prime voltage detection module
Step voltage V before detectiond, export and VdThe signal S of direct ratio2(wherein, S2=K2·Vd) to adjustment module.Voltage feedback module is obtained
Charging voltage V of automobile batterieso, export and charging voltage VoFeedback signal S being directly proportional3(wherein, S3=K3·Vo) also give
Adjustment module.Adjustment module carries out following computing according to above three signal：
Assume that required charging current isCharging voltage (i.e. the voltage of automobile batteries) is Vo, then output be
Po：
Assume that required primary current isIf front step voltage is Vd, then the power P of charging system prime/For：
Known charge system prime to the conversion efficiency of rear class be η, then P/With PoRelation be：
Pi=PO/ η (formula 3)
By formula formula 1- formula 3, can draw：
Again because signal S1、S2、S3Respectively：
Wherein：K1For primary current amplification coefficient, RsFor current sensor proportionality coefficient；K2For prime voltage amplification coefficient,
K3For charging voltage amplification coefficient.
Primary current required for formula formula 4 and formula 5 are obtainedThe primary current I for detectingpMiss with primary current
Difference △ IpRespectively：
Adjustment module according to formula formula 6, calculate (Ip、△Ip), then to primary current error delta IpCarry out PID (ratios
Example-Integrated Derivative) adjust and generate Regulate signal and driven according to Regulate signal to switching tube drive module, switching tube drive module
Dynamic switching tube, you can to primary current real-time feedback control, so as to realize indirectly the regulation and control to charging current.
In the present embodiment, primary current error is adjusted may also include：By neural network algorithm or small echo
Function algorithm or FUZZY ALGORITHMS FOR CONTROL are adjusted to primary current error.
The method that charging system former limit provided in an embodiment of the present invention regulates and controls charging current, by being directly proportional to primary current
The secondary signal that is directly proportional to front step voltage of the first signal and the 3rd signal being directly proportional to charging voltage, to former limit electricity
Stream error is adjusted, and simple and safe can be reliably achieved the detection to charging current and feedback control；Relative to existing skill
For art, secondary current detection and process circuit are eliminated, is eliminated and the peace that feedback device is brought is isolated by photoelectrical coupler etc.
Full blast danger.
It should be noted that herein, term " including ", "comprising" or its any other variant are intended to non-row
His property is included, so that a series of process, method, article or device including key elements not only include those key elements, and
And also include other key elements being not expressly set out, or also include for this process, method, article or device institute inherently
Key element.In the absence of more restrictions, the key element for being limited by sentence "including a ...", it is not excluded that including being somebody's turn to do
Also there is other identical element in the process of key element, method, article or device.
The preferred embodiments of the present invention are these are only, the scope of the claims of the present invention is not thereby limited, it is every using this
Equivalent structure or equivalent flow conversion that bright description and accompanying drawing content are made, or directly or indirectly it is used in other related skills
Art field, is included within the scope of the present invention.
Claims (4)
1. a kind of method that charging system former limit regulates and controls charging current, front level power supply that the charging system includes being sequentially connected,
Changer, transformator, output loop and automobile batteries, the changer include switching tube and switching tube drive module；Its feature
It is that methods described includes：
Detection primary current, and generate the first signal being directly proportional to primary current；
Step voltage before detection, and generate the secondary signal being directly proportional to front step voltage；
The charging voltage of automobile batteries is obtained, and generates the 3rd signal being directly proportional to charging voltage；
According to first signal, the secondary signal and the 3rd signal, primary current error is adjusted and is given birth to
The switch is driven according to the Regulate signal to the switching tube drive module, the switching tube drive module into Regulate signal
Pipe.
2. the method that a kind of charging system former limit according to claim 1 regulates and controls charging current, it is characterised in that described right
Primary current error is adjusted including：PID regulations are carried out to primary current error.
3. the method that a kind of charging system former limit according to claim 1 regulates and controls charging current, it is characterised in that described right
Primary current error is adjusted including：By neural network algorithm or wavelet function algorithm or FUZZY ALGORITHMS FOR CONTROL pair
Primary current error is adjusted.
4. the method that a kind of charging system former limit according to claim 2 regulates and controls charging current, it is characterised in that according to
Lower formula is calculatedPID regulations are carried out to primary current error again：
Wherein,For need charging current,For the primary current for needing, IpFor primary current, △ IpMiss for primary current
Difference, conversion efficiencies of the η for charging system prime to rear class, K1For primary current amplification coefficient, RsFor current sensor ratio system
Number；K2For prime voltage amplification coefficient, K3For charging voltage amplification coefficient, S1For the first signal, S2For secondary signal, S3For the 3rd
Signal.
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| CN201611128960.1A CN106549453A (en) | 2016-12-09 | 2016-12-09 | A kind of method that charging system former limit regulates and controls charging current |
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| CN201611128960.1A CN106549453A (en) | 2016-12-09 | 2016-12-09 | A kind of method that charging system former limit regulates and controls charging current |
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| CN103904760A (en) * | 2014-03-25 | 2014-07-02 | 奇瑞汽车股份有限公司 | Electric vehicle vehicle-mounted charge control system and control method thereof |
| CN104184326A (en) * | 2013-05-21 | 2014-12-03 | 丰田自动车株式会社 | Power conversion apparatus and power conversion method |
| CN104682710A (en) * | 2013-11-27 | 2015-06-03 | 丰田自动车株式会社 | Power conversion apparatus and power conversion method |
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2016
- 2016-12-09 CN CN201611128960.1A patent/CN106549453A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1764036A (en) * | 2004-10-20 | 2006-04-26 | 台达电子工业股份有限公司 | Charging circuit and uninterrupted power supply system using the same |
| CN102055358A (en) * | 2009-11-05 | 2011-05-11 | 凹凸电子（武汉）有限公司 | Power converter, charging method and charging system |
| CN104184326A (en) * | 2013-05-21 | 2014-12-03 | 丰田自动车株式会社 | Power conversion apparatus and power conversion method |
| CN104682710A (en) * | 2013-11-27 | 2015-06-03 | 丰田自动车株式会社 | Power conversion apparatus and power conversion method |
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Address after: 518000 room 1306, Press Plaza, Shennan Avenue, Futian District, Shenzhen, Guangdong Applicant after: ANKE ROBOT CO.,LTD. Address before: 518054 room 1306, Press Plaza, Shennan Avenue, Futian District, Shenzhen, Guangdong Applicant before: ANKE SMART CITY TECHNOLOGY (PRC) Co.,Ltd. |
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Effective date of registration: 20180906 Address after: 518000 Shenzhen, Guangdong Guangming New District Guangming Street Wan Dai Heng hi tech Industrial Park 5, 5 floor. Applicant after: SHENZHEN ZHONGZHI KECHUANG ROBOT Co.,Ltd. Address before: 518000 room 1306, Press Plaza, Shennan Avenue, Futian District, Shenzhen, Guangdong Applicant before: ANKE ROBOT CO.,LTD. |
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Application publication date: 20170329 |