CN108075651A - Vehicle-mounted charging device and system - Google Patents
Vehicle-mounted charging device and system Download PDFInfo
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- CN108075651A CN108075651A CN201711335487.9A CN201711335487A CN108075651A CN 108075651 A CN108075651 A CN 108075651A CN 201711335487 A CN201711335487 A CN 201711335487A CN 108075651 A CN108075651 A CN 108075651A
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- 230000002441 reversible effect Effects 0.000 claims description 14
- 239000000919 ceramic Substances 0.000 claims description 6
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- 238000012546 transfer Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 4
- 238000013461 design Methods 0.000 description 8
- 239000003990 capacitor Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 5
- 230000005611 electricity Effects 0.000 description 5
- 238000004146 energy storage Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
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- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
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Classifications
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- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
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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
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/20—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by converters located in the vehicle
-
- H02J7/022—
-
- 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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
-
- 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
- B60L2210/00—Converter types
- B60L2210/10—DC to DC converters
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/92—Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
Abstract
The present invention provides a kind of vehicle-mounted charging device and systems, are related to electric vehicle charging technique field, which includes：First electromagnetic interface filter, AC/DC converters, the first DC/DC converters, the second electromagnetic interface filter, the 2nd DC/DC converters and the 3rd electromagnetic interface filter；AC terminals connect the first DC source by the first electromagnetic interface filter, AC/DC converters, the first DC/DC converters and the second electromagnetic interface filter, and the second DC source is connected by the first electromagnetic interface filter, AC/DC converters, the 2nd DC/DC converters and the 3rd electromagnetic interface filter.Vehicle-mounted charging device provided by the invention and system can improve transfer efficiency, reduce cost, reduce volume.
Description
Technical field
The present invention relates to electric vehicle charging technique field, more particularly, to a kind of vehicle-mounted charging device and system.
Background technology
Electric vehicle is using vehicle power supply as power, and wheels travel is driven with motor.Electric vehicle is since its is energy saving, ring
It protects, noise is small etc., and advantages, prospect are had an optimistic view of extensively.At present there are two types of DC source on electric vehicle, a kind of DC source is driving
Motor provides electric power, such as power battery；Another DC source is vehicle mounted electrical apparatus, such as lamp, instrument, air-conditioning, water pump, refrigerator or electric meal
Pot etc. provides electric power, such as low tension battery；It is generally necessary to the alternating current of reception is converted into direct current by a vehicle-mounted charging device
It charges for both DC sources.
Fig. 1 is a kind of structure diagram of existing on-board charging system, as shown in Figure 1, AC (Alternating
Current, alternating current) terminal pass through by the first EMI (Electromagnetic Interference, electromagnetic interference) filter
The vehicle that device, AC/DC (Direct Current, direct current) converter, the first DC/DC converters and the second electromagnetic interface filter form
It carries charger and connects the first DC source (power battery), one end of the 4th electromagnetic interface filter is connected to the second electromagnetic interface filter and first
Between DC source, and pass through the 2nd DC/DC converters and the 3rd electromagnetic interface filter the second DC source of connection (low tension battery).Its
In, the 4th electromagnetic interface filter, the 2nd DC/DC converters and the 3rd electromagnetic interface filter constitute vehicle-mounted DC converters.Based on Fig. 1,
In the prior art, there are following two modes for low tension battery charging：(1) AC terminals are become by the first electromagnetic interface filter, AC/DC
Parallel operation, the first DC/DC converters, the second electromagnetic interface filter, the 4th electromagnetic interface filter, the 2nd DC/DC converters and the 3rd EMI filtering
Device be low tension battery charge namely AC terminals by Vehicular charger and vehicle-mounted DC converters be low tension battery charging；(2)
Power battery by the 4th electromagnetic interface filter, the 2nd DC/DC converters and the 3rd electromagnetic interface filter for low tension battery charge namely
Power battery is charged by vehicle-mounted DC converters for low tension battery.For mode (1), since the link that centre is passed through is more, because
The efficiency of this on-board charging system is low, of high cost, volume is big；For mode (2), since the voltage range of power battery compares
Extensively, such as between its high pressure and low pressure usually there is twice of difference namely need the 2nd DC/DC converters of a wide input range,
Therefore the efficiency of the 2nd DC/DC converters is low；Alternatively, the 2nd DC/DC converters are become by pre-adjustment converter+narrow input DC/DC
Parallel operation two-stage circuit realizes, therefore the control of the on-board charging system is complicated and efficiency is low, of high cost, volume is big.
In summary, there are transfer efficiency is low, of high cost and bulky problem for existing on-board charging system.
The content of the invention
In view of this, it is an object of the invention to provide a kind of vehicle-mounted charging device and system, to improve transfer efficiency, drop
Low cost reduces volume.
In a first aspect, an embodiment of the present invention provides a kind of vehicle-mounted charging device, including：First electromagnetic interface filter, AC/DC
Converter, the first DC/DC converters, the second electromagnetic interface filter, the 2nd DC/DC converters and the 3rd electromagnetic interface filter；
For connecting AC terminals, the other end of first electromagnetic interface filter connects institute for one end of first electromagnetic interface filter
The exchange end of AC/DC converters is stated, the first of DC terminal connection the first DC/DC converters of the AC/DC converters is straight
End is flowed, the second DC terminal of the first DC/DC converters connects one end of second electromagnetic interface filter, the 2nd EMI filters
The other end of ripple device is for the first DC source of connection；
First DC terminal of the 2nd DC/DC converters connects the DC terminal and described the of the AC/DC converters
First DC terminal of one DC/DC converters, the second DC terminal of the 2nd DC/DC converters connect the 3rd EMI filtering
One end of device, the other end of the 3rd electromagnetic interface filter is for the second DC source of connection.
With reference to first aspect, an embodiment of the present invention provides the first possible embodiment of first aspect, wherein, institute
The first DC terminal for stating the 2nd DC/DC converters receives the middle dc voltage that the DC terminal of the AC/DC converters exports, institute
The range of voltage values of middle dc voltage is stated as the 95% of the rated output voltage of the AC/DC converters to the rated output
Between the 105% of voltage.
With reference to first aspect, an embodiment of the present invention provides second of possible embodiment of first aspect, wherein, institute
The first DC terminal for stating the 2nd DC/DC converters receives the middle dc voltage that the DC terminal of the AC/DC converters exports, institute
The maximum voltage value for stating middle dc voltage is 1.08 to 1.12 times of its minimum voltage value.
With reference to first aspect, an embodiment of the present invention provides the third possible embodiment of first aspect, wherein, institute
The both ends for stating the DC terminal of AC/DC converters are connected with capacitance, and middle dc voltage is exported by the capacitance；The capacitance
Capacitance is for F grades of ten μ or less than F grades of ten μ.
The third possible embodiment with reference to first aspect, an embodiment of the present invention provides the 4th kind of first aspect
Possible embodiment, wherein, the capacitance includes thin-film electro perhaps ceramic condenser.
With reference to first aspect, an embodiment of the present invention provides the 5th kind of possible embodiment of first aspect, wherein, institute
The first DC terminal for stating the 2nd DC/DC converters is directly connected to the DC terminal of the AC/DC converters and the first DC/DC
First DC terminal of converter.
Second aspect, the embodiment of the present invention also provide a kind of on-board charging system, including such as above-mentioned first aspect and its appoint
A kind of vehicle-mounted charging device described in possible embodiment, further includes the first DC source and the second DC source；
First DC source is connected with second electromagnetic interface filter, and second DC source is filtered with the 3rd EMI
Device connects.
With reference to second aspect, an embodiment of the present invention provides the first possible embodiment of second aspect, wherein, institute
It states on-board charging system and further includes control unit, described control unit connects the vehicle-mounted charging device；
Described control unit is used to control the exchange that the AC/DC converters will be received by first electromagnetic interface filter
Voltage conversion is middle dc voltage, and controls the 2nd DC/DC converters that the middle dc voltage is converted to second
DC voltage charges for second DC source.
With reference to second aspect, an embodiment of the present invention provides second of possible embodiment of second aspect, wherein, institute
It states on-board charging system and further includes control unit, described control unit connects the vehicle-mounted charging device；First DC/DC becomes
Parallel operation is reversible transducer；
Described control unit is used to control the first direct current that the first DC/DC converters export first DC source
Voltage conversion is middle dc voltage, and controls the 2nd DC/DC converters that the middle dc voltage is converted to second
DC voltage charges for second DC source.
With reference to second aspect, an embodiment of the present invention provides the third possible embodiment of second aspect, wherein, institute
It states on-board charging system and further includes control unit, described control unit connects the vehicle-mounted charging device；2nd DC/DC becomes
Parallel operation is reversible transducer；
Described control unit is used to control the second direct current that the 2nd DC/DC converters export second DC source
Voltage conversion is middle dc voltage, and controls the first DC/DC converters that the middle dc voltage is converted to first
DC voltage charges for first DC source.
With reference to the third possible embodiment of second aspect, an embodiment of the present invention provides the 4th kind of second aspect
Possible embodiment, wherein, the AC/DC converters are reversible transducer；
Described control unit is additionally operable to control the AC/DC converters that the middle dc voltage is converted to alternating voltage
It powers for AC terminals.
With reference to the third or the 4th kind of possible embodiment of second aspect, an embodiment of the present invention provides second aspects
The 5th kind of possible embodiment, wherein, the first DC/DC converters be reversible transducer；
Described control unit is used to control the first direct current that the first DC/DC converters export first DC source
Voltage conversion is middle dc voltage, and controls the 2nd DC/DC converters that the middle dc voltage is converted to second
DC voltage charges for second DC source.
The embodiment of the present invention brings the advantageous effect of one below：
In the embodiment of the present invention, vehicle-mounted charging device includes：First electromagnetic interface filter, AC/DC converters, the first DC/DC become
Parallel operation, the second electromagnetic interface filter, the 2nd DC/DC converters and the 3rd electromagnetic interface filter；AC terminals pass through the first electromagnetic interface filter, AC/
DC converters, the first DC/DC converters and the second electromagnetic interface filter connect the first DC source, pass through the first electromagnetic interface filter, AC/DC
Converter, the 2nd DC/DC converters and the 3rd electromagnetic interface filter connect the second DC source.Since the DC terminal of AC/DC converters is defeated
The DC voltage gone out is relatively stablized, therefore compared with the prior art, and the 2nd DC/DC converters in the present embodiment only need one narrow defeated
The 2nd DC/DC converters entered, and only need level-one that its function can be realized.Compared with the two-stage circuit of the prior art, this implementation
2nd DC/DC converters of example reduce level-one pre-adjustment converter, therefore simple in structure, efficient, at low cost and small；Phase
For the wide input DC/DC converters of the prior art, the 2nd DC/DC converters of the narrow input of the present embodiment, the circle of transformer
Resistance to pressure request than designing relatively optimization, switch tube is low, therefore the performance meeting of switching tube is more preferable, cost is lower, easily complete defeated
Enter scope and full-load range reaches high efficiency, design is simple；Compared with the prior art, the input terminal of the 2nd DC/DC converters
The 4th electromagnetic interface filter is not required, therefore can further reduce volume, reduce cost, improve efficiency.
Other features and advantages of the present invention will illustrate in the following description, also, partly become from specification
It obtains it is clear that being understood by implementing the present invention.The purpose of the present invention and other advantages are in specification, claims
And specifically noted structure is realized and obtained in attached drawing.
For the above objects, features and advantages of the present invention is enable to be clearer and more comprehensible, preferred embodiment cited below particularly, and coordinate
Appended attached drawing, is described in detail below.
Description of the drawings
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution of the prior art
Embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, in describing below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is a kind of structure diagram of existing on-board charging system；
Fig. 2 is the structure diagram of on-board charging system provided in this embodiment；
Fig. 3 be on-board charging system provided in this embodiment charge mode in AC terminals be low tension battery charge show
It is intended to；
Fig. 4 be on-board charging system provided in this embodiment driving mode in power battery be what low tension battery charged
Schematic diagram；
Fig. 5 is that the contingency mode mesolow accumulator of on-board charging system provided in this embodiment is power battery charging
Schematic diagram；
Fig. 6 is that the discharge mode mesolow accumulator of on-board charging system provided in this embodiment is showing for AC terminal charges
It is intended to；
Fig. 7 is the connection diagram of the DC terminal capacitance of AC/DC converters in on-board charging system provided in this embodiment.
Icon：
100- vehicle-mounted charging devices；The first electromagnetic interface filters of 101-；102-AC/DC converters；The first DC/DC of 103- are converted
Device；The second electromagnetic interface filters of 104-；The 2nd DC/DC converters of 105-；The 3rd electromagnetic interface filters of 106-；The first DC sources of 200-；
The second DC sources of 300-；400- control units.
Specific embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with attached drawing to the present invention
Technical solution be clearly and completely described, it is clear that described embodiment be part of the embodiment of the present invention rather than
Whole embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Lower all other embodiments obtained, belong to the scope of protection of the invention.
There are transfer efficiency is low, of high cost and bulky problem for current existing on-board charging system.Based on this, this
A kind of vehicle-mounted charging device and system that inventive embodiments provide can improve transfer efficiency, reduce cost, reduce volume.
As shown in Fig. 2, on-board charging system includes vehicle-mounted charging device 100, the first DC source 200 and the second DC source
300, vehicle-mounted charging device 100 includes：First electromagnetic interface filter 101, AC/DC converters 102, the first DC/DC converters 103,
Two electromagnetic interface filters 104, the 2nd DC/DC converters 105 and the 3rd electromagnetic interface filter 106；It uses one end of first electromagnetic interface filter 101
In connection AC terminals, the exchange end of the other end connection AC/DC converters 102 of the first electromagnetic interface filter 101, AC/DC converters
102 DC terminal connects the first DC terminal of the first DC/DC converters 103, the second DC terminal of the first DC/DC converters 103
One end of the second electromagnetic interface filter 104 is connected, the other end of the second electromagnetic interface filter 104 is for the first DC source 200 of connection；Second
The DC terminals of the first DC terminal connection AC/DC converters 102 of DC/DC converters 105 and the first DC/DC converters 103
First DC terminal, the second DC terminal of the 2nd DC/DC converters 105 connect one end of the 3rd electromagnetic interface filter 106, the 3rd EMI filters
The other end of ripple device 106 is for the second DC source 300 of connection.
Next it is power battery with the first DC source 200, the second DC source 300 is specific to be carried out exemplified by low tension battery
Illustrate, certain first DC source, 200 and second DC source 300 can also be other types of energy-storage travelling wave tube, be not limited thereto.
As shown in Fig. 2, compared with prior art, the first DC terminal of the 2nd DC/DC converters 105 is connected to AC/DC changes
The DC terminal of parallel operation 102, to receive the DC voltage of the output of AC/DC converters 102；In some embodiments, the 2nd DC/DC becomes
First DC terminal of parallel operation 105 be directly connected to AC/DC converters 102 DC terminal and the first DC/DC converters 103 first
DC terminal, to receive the DC voltage of the output of AC/DC converters 102, the DC voltage that AC/DC converters 102 export is more steady
It is fixed.In some possible embodiments, the range of voltage values of the middle dc voltage V0 of AC/DC converters output becomes for AC/DC
Between the 95% to 105% of the rated output voltage of parallel operation or the maximum voltage value V02 of middle dc voltage V0 is minimum for its
1.08 to 1.12 times of voltage value V01.Such as：For 220V power grids, the rated output voltage of AC/DC converters is 400V, then
The fluctuation range of middle dc voltage V0 is 380V to 420V or V02=1.1V01.
And in the prior art, the first DC terminal of the 2nd DC/DC converters connects the first DC source, such as power battery.It is dynamic
The range of voltage values of power battery is the 70% to 130% of the rated output voltage of power battery, such as currently used power battery
Voltage range be respectively high pressures of the 70V to 150V, 100V to 180V, 180V to 320V, 240V to 450V namely power battery
About 1.8 times to 2.2 times or so of its low pressure.Because its input voltage range is wider, it usually needs a pre-adjustment converter
And one narrow input DC/DC converters two-stage circuit or a width input DC/DC converters.
Therefore compared with the prior art, the 2nd DC/DC converters of a narrow input are only needed in the present embodiment, and only need level-one
Its function can be realized.Compared with the two-stage circuit of the prior art, the 2nd DC/DC converters reduction level-one of the present embodiment is presetting
Whole converter, thus it is simple in structure, efficient, at low cost and small；Compared with the wide input DC/DC conversion of the prior art
Device, the 2nd DC/DC converters of the narrow input of the present embodiment, the turn ratio design relatively optimization of transformer, the pressure-resistant of switch tube will
Ask low, therefore the performance meeting of switching tube is more preferable, cost is lower, easily reaches high efficiency in full input range and full-load range,
Therefore design simple；Compared with the prior art, the 4th electromagnetic interface filter is not required in the input terminal of the 2nd DC/DC converters, therefore can
Further reduce volume, reduce cost, improve efficiency.
In view of on-board charging system AC/DC converters DC terminal there are a large amount of quadergies, and cause a large amount of lines
Ripple, therefore the DC terminal of AC/DC converters need to usually connect the larger electrolytic capacitor of a capacitance, such as hundred μ F ranks in the prior art
Or the capacitance of bigger is as energy storage and filter element.But electrolytic capacitor is bulky, heat resistance is poor, the service life is also shorter, and
On-board charging system is typically mounted in vehicle, and maintenance is relatively difficult, therefore often causes entire vehicle due to electrolytic capacitor damages
Charging system is carried to scrap.And the first DC terminal of the 2nd DC/DC converters of the on-board charging system in the present embodiment is connected to
The capacitance both ends of the DC terminal of AC/DC converters, the 2nd DC/DC converters can absorb the nothing of the DC terminal of AC/DC converters
Function amount, therefore the both ends of the DC terminal of AC/DC converters need to only connect the smaller capacitance of a capacitance, usual ten μ F ranks or more
Small capacitance, such as thin-film electro perhaps ceramic condenser, you can realize the function of the electrolytic capacitor of large capacity in the prior art.Due to thin
Membrane capacitance or ceramic condenser are high compared with electrochemical capacitor life length, reliability, and the demand of low capacity can use the capacitance of smaller size smaller,
Therefore the volume of on-board charging system can also be reduced while the service life for improving on-board charging system.
In some possible embodiments, as shown in figure 3, on-board charging system further includes control unit 400, control unit
The 400 above-mentioned vehicle-mounted charging devices 100 of connection, control unit 400 can control vehicle-mounted charging device 100 be operated in charge mode,
Driving mode, discharge mode, contingency mode or compensation model etc..
As shown in figure 3, in charge mode, when AC terminals charge for low tension battery, control unit 400 controls AC/DC
The alternating current received by the first electromagnetic interface filter 101 is converted to middle dc voltage V0 by converter 102, and controls second
Middle dc voltage V0 is converted to the second DC voltage V2 and charged for low tension battery by DC/DC converters 105.With the prior art
It compares, the first DC/DC converters, the second electromagnetic interface filter, the work of the 4th electromagnetic interface filter is not required, the link of process is few, efficiency
Height, and the 2nd DC/DC transducer effciencies are high, at low cost, small, design is simple.
In one embodiment, the first DC/DC converters 103 are reversible transducer, i.e. the first DC/DC converters 103 can both incite somebody to action
Middle dc voltage V0 is converted to the first DC voltage V1, also can the first DC voltage V1 be converted to middle dc voltage V0.
As shown in figure 4, in driving mode, when charging for low tension battery, control unit 400 controls the first DC/DC converters 103 will
First DC voltage V1 of power battery output is converted to middle dc voltage V0, and controls the 2nd DC/DC converters 105 by
Between DC voltage V0 be converted to the second DC voltage V2 for low tension battery charge.With vehicle-mounted DC converters phase of the prior art
Than the 2nd DC/DC converters 105 are efficient, at low cost, small, and design is simple.
In another embodiment, the 2nd DC/DC converters 105 are reversible transducer, i.e. the 2nd DC/DC converters 105 both may be used
Middle dc voltage V0 is converted into the second DC voltage V2, also the second DC voltage V2 can be converted to middle dc voltage
V0.As shown in figure 5, in contingency mode, when low tension battery is to power battery charging, control unit 400 controls the 2nd DC/DC
Second DC voltage V2 is converted to the first DC voltage V0 by converter 105, and controls the first DC/DC converters 103 by centre
DC voltage V0 is converted to the first DC voltage V1 as power battery charging.Compared with prior art, the 2nd DC/DC converters
105 is efficient, at low cost, small, and design is simple.It should be noted that under this operating mode, the first DC/DC converters 103
Can be reversible transducer or uni-directional converter.When the first DC/DC converters 103 are simultaneously reversible transducer, travelling
In pattern, when power battery charges for low tension battery, control unit 400 controls the first DC/DC converters 103 by power battery
First DC voltage V1 of output is converted to middle dc voltage V0, and controls the 2nd DC/DC converters 105 by intermediate dc electricity
Pressure V0 is converted to the second DC voltage V2 and charges for low tension battery.
In another embodiment, AC/DC converters 102 are reversible transducer, and AC/DC converters 102 both can be by alternating voltage
Middle dc voltage V0 is converted to, also middle dc voltage V0 can be converted to alternating voltage；2nd DC/DC converters 105 are
Middle dc voltage V0 can be both converted to the second DC voltage V2 by reversible transducer, i.e. the 2nd DC/DC converters 105, also may be used
Second DC voltage V2 is converted into middle dc voltage V0.As shown in fig. 6, in discharge mode, low tension battery is whole to AC
During the power supply of end, control unit 400 controls the 2nd DC/DC converters 105 that second DC voltage V2 is converted to middle dc voltage
V0, and control AC/DC converters 102 that middle dc voltage V0 is converted to alternating voltage and power for AC terminals.With the prior art
It compares, saves the 4th electromagnetic interface filter, the second electromagnetic interface filter and the first DC/DC converters, the link of process is few, efficient,
And the 2nd DC/DC transducer effciencies it is high, at low cost, small, design is simple.It should be noted that first under this operating mode
DC/DC converters 103 can be reversible transducer or uni-directional converter.When the first DC/DC converters 103 are two-way changing
During device, in driving mode, when power battery charges for low tension battery, control unit 400 controls the first DC/DC converters
First DC voltage V1 of power battery output is converted to middle dc voltage V0 by 103, and controls the 2nd DC/DC converters
Middle dc voltage V0 is converted to the second DC voltage V2 by 105 to charge for low tension battery.
In another embodiment, when above-mentioned on-board charging system is operated in compensation model, the control of control unit 400 second
DC/DC converters 105 work, to absorb the quadergy of the DC terminal of AC/DC converters 102, therefore as shown in Figure 7 (in figure
The first electromagnetic interface filter is not shown), the both ends of the DC terminal of AC/DC converters 102 need to only connect the smaller capacitance C of a capacitance.It is logical
Normal ten μ F ranks or smaller capacitance, such as thin-film electro perhaps ceramic condenser, you can realize the electrolysis electricity of large capacity in the prior art
The function of appearance.Since thin-film electro perhaps ceramic condenser is long compared with electrochemical capacitor life, reliability is high, and the demand of low capacity can be used
The capacitance of smaller size smaller, therefore the volume of on-board charging system can also be reduced while the service life of raising on-board charging system.
On-board charging system provided in this embodiment can also be operated in other patterns, and such as in charge mode, AC terminals are
During power battery charging, control unit control AC/DC converters will be received by the first electromagnetic interface filter during alternating current is converted to
Between DC voltage V0, and control the first DC/DC converters that middle dc voltage V0 is converted to the first DC voltage V1 for power
Battery charges.
For another example in charge mode, when AC terminals charge simultaneously for power battery and low tension battery, control unit control
AC/DC converters will be received alternating current by the first electromagnetic interface filter and be converted to middle dc voltage V0, and control the first DC/
Middle dc voltage V0 is converted to the first DC voltage V1 as power battery charging by DC converters, and controls the 2nd DC/ simultaneously
Middle dc voltage V0 is converted to the second DC voltage V2 and charged for low tension battery by DC converters.
For another example in discharge mode, when power battery is powered for AC terminals, control unit controls the first DC/DC converters will
First DC voltage V1 is converted to middle dc voltage V0, and controls AC/DC converters that middle dc voltage V0 is converted to friendship
Galvanic electricity pressure is powered for AC terminals.
For another example in discharge mode, when power battery is powered simultaneously for AC terminals and low tension battery, control unit control
First DC voltage V1 is converted to middle dc voltage V0 by the first DC/DC converters, and controls AC/DC converters will be intermediate straight
Galvanic electricity pressure V0 is converted to alternating voltage and powers for AC terminals, while the 2nd DC/DC converters is controlled to turn middle dc voltage V0
The second DC voltage V2 is changed to charge for low tension battery.
For another example in contingency mode, when low tension battery is powered simultaneously for AC terminals and power battery, control unit control
Second DC voltage V2 is converted to middle dc voltage V0 by the 2nd DC/DC converters, and controls AC/DC converters will be intermediate straight
Galvanic electricity pressure V0 is converted to alternating voltage and powers for AC terminals, while the first DC/DC converters is controlled to turn middle dc voltage V0
The first DC voltage V1 is changed to as power battery charging.
In above-mentioned operating mode, the 4th electromagnetic interface filter is not required and the 2nd DC/DC converters only need the narrow input of level-one
Converter can be realized, therefore on-board charging system provided in this embodiment is efficient, at low cost, small, and design is simple.
In the description of the embodiment of the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " company
Connect " it should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected or be integrally connected；It can be machine
Tool is connected or is electrically connected；It can be directly connected, can also be indirectly connected by intermediary, can be two members
Connection inside part.For the ordinary skill in the art, can above-mentioned term be understood in the present invention with concrete condition
Concrete meaning.
In the description of the present invention, it is necessary to explanation, term " " center ", " on ", " under ", "left", "right", " vertical ",
The orientation or position relationship of the instructions such as " level ", " interior ", " outer " be based on orientation shown in the drawings or position relationship, merely to
Convenient for the description present invention and simplify description rather than instruction or imply signified device or element must have specific orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.In addition, term " first ", " second ",
" the 3rd " is only used for description purpose, and it is not intended that instruction or hint relative importance.
In all examples being illustrated and described herein, any occurrence should be construed as merely illustrative, without
It is as limitation, therefore, other examples of exemplary embodiment can have different values.
Finally it should be noted that：Embodiment described above is only the specific embodiment of the present invention, to illustrate the present invention
Technical solution, rather than its limitations, protection scope of the present invention is not limited thereto, although with reference to the foregoing embodiments to this hair
It is bright to be described in detail, it will be understood by those of ordinary skill in the art that：Any one skilled in the art
In the technical scope disclosed by the present invention, can still modify to the technical solution recorded in previous embodiment or can be light
It is readily conceivable that variation or equivalent substitution is carried out to which part technical characteristic；And these modifications, variation or replacement, do not make
The essence of appropriate technical solution departs from the spirit and scope of technical solution of the embodiment of the present invention, should all cover the protection in the present invention
Within the scope of.Therefore, protection scope of the present invention described should be subject to the protection scope in claims.
Claims (12)
1. a kind of vehicle-mounted charging device, which is characterized in that including：First electromagnetic interface filter, AC/DC converters, the first DC/DC become
Parallel operation, the second electromagnetic interface filter, the 2nd DC/DC converters and the 3rd electromagnetic interface filter；
One end of first electromagnetic interface filter is for connecting AC terminals, described in the other end connection of first electromagnetic interface filter
The exchange end of AC/DC converters, the DC terminal of the AC/DC converters connect the first direct current of the first DC/DC converters
End, the second DC terminal of the first DC/DC converters connect one end of second electromagnetic interface filter, the 2nd EMI filtering
The other end of device is for the first DC source of connection；
First DC terminal of the 2nd DC/DC converters connects the DC terminal of the AC/DC converters and the first DC/
First DC terminal of DC converters, the second DC terminal of the 2nd DC/DC converters connect the one of the 3rd electromagnetic interface filter
End, the other end of the 3rd electromagnetic interface filter is for the second DC source of connection.
2. vehicle-mounted charging device according to claim 1, which is characterized in that the first of the 2nd DC/DC converters is straight
Flow the middle dc voltage that end receives the DC terminal output of the AC/DC converters, the voltage value model of the middle dc voltage
95% of the rated output voltage for the AC/DC converters is enclosed between the 105% of the rated output voltage.
3. vehicle-mounted charging device according to claim 1, which is characterized in that the first of the 2nd DC/DC converters is straight
Flow the middle dc voltage that end receives the DC terminal output of the AC/DC converters, the ceiling voltage of the middle dc voltage
It is worth for 1.08 to 1.12 times of its minimum voltage value.
4. vehicle-mounted charging device according to claim 1, which is characterized in that the two of the DC terminal of the AC/DC converters
End is connected with capacitance, and middle dc voltage is exported by the capacitance；The capacitance of the capacitance is for F grades of ten μ or less than F grades of ten μ.
5. vehicle-mounted charging device according to claim 4, which is characterized in that the capacitance includes thin-film electro perhaps ceramic electrical
Hold.
6. vehicle-mounted charging device according to claim 1, which is characterized in that the first of the 2nd DC/DC converters is straight
Stream end is directly connected to the DC terminal of the AC/DC converters and the first DC terminal of the first DC/DC converters.
7. a kind of on-board charging system, which is characterized in that including the vehicle-mounted charge as any one of the claims 1-6
Device further includes the first DC source and the second DC source；
First DC source is connected with second electromagnetic interface filter, and second DC source connects with the 3rd electromagnetic interface filter
It connects.
8. on-board charging system according to claim 7, which is characterized in that it is single that the on-board charging system further includes control
Member, described control unit connect the vehicle-mounted charging device；
Described control unit is used to control the alternating voltage that the AC/DC converters will be received by first electromagnetic interface filter
Middle dc voltage is converted to, and controls the 2nd DC/DC converters that the middle dc voltage is converted to the second direct current
Voltage charges for second DC source.
9. on-board charging system according to claim 7, which is characterized in that it is single that the on-board charging system further includes control
Member, described control unit connect the vehicle-mounted charging device；The first DC/DC converters are reversible transducer；
Described control unit is used to control the first DC voltage that the first DC/DC converters export first DC source
Middle dc voltage is converted to, and controls the 2nd DC/DC converters that the middle dc voltage is converted to the second direct current
Voltage charges for second DC source.
10. on-board charging system according to claim 7, which is characterized in that the on-board charging system further includes control
Unit, described control unit connect the vehicle-mounted charging device；The 2nd DC/DC converters are reversible transducer；
Described control unit is used to control the second DC voltage that the 2nd DC/DC converters export second DC source
Middle dc voltage is converted to, and controls the first DC/DC converters that the middle dc voltage is converted to the first direct current
Voltage charges for first DC source.
11. on-board charging system according to claim 10, which is characterized in that the AC/DC converters are two-way changing
Device；
Described control unit is additionally operable to control the AC/DC converters that the middle dc voltage is converted to alternating voltage for AC
Terminal is powered.
12. the on-board charging system according to claim 10 or 11, which is characterized in that the first DC/DC converters are
Reversible transducer；
Described control unit is used to control the first DC voltage that the first DC/DC converters export first DC source
Middle dc voltage is converted to, and controls the 2nd DC/DC converters that the middle dc voltage is converted to the second direct current
Voltage charges for second DC source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711335487.9A CN108075651A (en) | 2017-12-13 | 2017-12-13 | Vehicle-mounted charging device and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711335487.9A CN108075651A (en) | 2017-12-13 | 2017-12-13 | Vehicle-mounted charging device and system |
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| CN108075651A true CN108075651A (en) | 2018-05-25 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711335487.9A Pending CN108075651A (en) | 2017-12-13 | 2017-12-13 | Vehicle-mounted charging device and system |
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| CN112572192A (en) * | 2019-09-29 | 2021-03-30 | 比亚迪股份有限公司 | Vehicle-mounted charging system and vehicle with same |
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