CN108512423A - A kind of vehicle-mounted DCDC power supplys of high-efficiency high-power - Google Patents
A kind of vehicle-mounted DCDC power supplys of high-efficiency high-power Download PDFInfo
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- CN108512423A CN108512423A CN201810502133.7A CN201810502133A CN108512423A CN 108512423 A CN108512423 A CN 108512423A CN 201810502133 A CN201810502133 A CN 201810502133A CN 108512423 A CN108512423 A CN 108512423A
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- HEZMWWAKWCSUCB-PHDIDXHHSA-N (3R,4R)-3,4-dihydroxycyclohexa-1,5-diene-1-carboxylic acid Chemical compound O[C@@H]1C=CC(C(O)=O)=C[C@H]1O HEZMWWAKWCSUCB-PHDIDXHHSA-N 0.000 title claims abstract description 19
- 239000000446 fuel Substances 0.000 claims abstract description 42
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 18
- 239000011162 core material Substances 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims description 9
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 239000002159 nanocrystal Substances 0.000 claims description 3
- 239000002994 raw material Substances 0.000 abstract description 4
- 239000003990 capacitor Substances 0.000 description 7
- 239000001257 hydrogen Substances 0.000 description 5
- 229910052739 hydrogen Inorganic materials 0.000 description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 238000012356 Product development Methods 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 239000002707 nanocrystalline material Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1584—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel
-
- 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
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/30—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells
-
- 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
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
-
- 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
- H02M1/14—Arrangements for reducing ripples from dc input or output
-
- 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
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/30—The power source being a fuel cell
-
- 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
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1584—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel
- H02M3/1586—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel switched with a phase shift, i.e. interleaved
-
- 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
- Y02T10/72—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
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/40—Application of hydrogen technology to transportation, e.g. using fuel cells
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Dc-Dc Converters (AREA)
- Fuel Cell (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The vehicle-mounted DCDC power supplys of high-efficiency high-power of the present invention, the output cathode of on-vehicle fuel fuel cell is connected with first contactor, the first reactor in turn through fuse, the output negative pole of fuel cell is connected with second contactor, first reactor, second contactor output end be connected in parallel to the first capacitance, first capacitance is connected with filter through DC/DC translation circuits, and filter output cathode end is connected to load power battery through counnter attack diode；DC/DC translation circuits are primary boost circuits, the reverse interleaved double Boost topological structures for being connected in parallel setting and constituting of secondary boost circuits；The unstable low-voltage that fuel cell is exported, is converted to stable high voltage and is stored in power battery, and for equipment on vehicle and driving motor, power output is efficient, small in volume, and raw material loss is few, of low cost.
Description
Technical field
The present invention relates to a kind of vehicle-mounted DCDC power supplys of high-efficiency high-power.
Background technology
As problem of environmental pollution constantly highlights, traditional petroleum-based energy cannot be satisfied the dynamic of present auto industry already
Power demand, the fuel cell of superior performance are widely regarded as the optimal selection of the following electric automobile energy scheme；Fuel cell
It is a kind of power generator that will be present in fuel and be converted into electric energy with the chemical energy in oxidant, the fuel of hydrogen fuel cell
For hydrogen and oxygen, reaction product is only water, therefore hydrogen cell automobile has reached zero-emission, zero dirt truly
Dye.
Since the output voltage of hydrogen fuel cell is low, fluctuation is larger, and output characteristics is relatively soft；If using fuel cell as
Electric vehicle directly drives power supply, it is necessary to the harder DC-DC converter of output characteristics is accessed after fuel cell, by fuel
Battery and the unified power supply of DC-DC converter composition power to vehicle；
The topological project of DC-DC converter in the prior art is broadly divided into isolated form DC/DC topological structures and non-isolation type
DC/DC topological structures, isolated form DC/DC topological circuits mainly have normal shock, flyback, recommend, bridge-type, LLC series resonances and its spread out
Raw topology etc., non-isolation type DC/DC topological circuits mainly have Buck/Boost, Cuk, Sepic and its derivative topology etc.；Isolated form
Converter topology component number is more, and occupied space is big, and installation operation is cumbersome, and the vehicle-mounted DC-DC converter of fuel cell
Power demand is larger, and power is generally higher than 30kW, and normal shock, flyback recommend class topological circuit 1kW power or less can only be suitble to electric
Source does not adapt to fuel-cell vehicle and carries power demand；The output voltage of fuel cell fluctuates also larger, surge area range
At tens volts between three or four hectovolts, bridge type topology efficiency in low-pressure high-power is too low, and it is vehicle-mounted can not to adapt to fuel cell
The demand of power supply；Although non-isolation type converter element device quantity is relatively fewer, occupied space is smaller, such as Boost type transformation
Device circuit is simple, and continuous input current is efficient, but its diode reverse recovery losses is larger, and system effectiveness is caused to reduce.
Invention content
The technical problem to be solved by the invention is to provide a kind of unstable low electricity that can export fuel cell
Pressure, is converted to stable high voltage and is stored in power battery, is mobile unit and driving motor supplies power, power output effect
Rate is high, small in volume, and raw material loss is few, the low-cost vehicle-mounted DCDC power supplys of high-efficiency high-power.
The vehicle-mounted DCDC power supplys of high-efficiency high-power of the present invention, including the on-vehicle fuel of energy can be stored and can be
The load power battery of mobile unit, driving motor supplies power, it is characterised in that：The output cathode of fuel cell is through fuse
It is connected with first contactor, the first reactor in turn, the output negative pole of fuel cell is connected with second contactor, first contactor
Be connected in parallel to preliminary filling electrical circuit between input terminal and output end, the first reactor, second contactor output end be connected in parallel
There are the first capacitance, the first capacitance to be connected with filter through DC/DC translation circuits, filter output cathode end connects through counnter attack diode
It is connected to load power battery；
DC/DC translation circuits are provided with several primary reactors being connected in parallel, and each primary reactor has been connected respectively
One primary IGBT rectification modules constitute several primary branches, and the output end of several primary branches is connected to primary output capacitance simultaneously
Constitute primary boost circuits；
DC/DC translation circuits are additionally provided with several secondary reactors being connected in parallel, and each secondary reactor is connected respectively
Once grade IGBT rectification modules constitute several secondary branches, and the output end of several secondary branches is connected to secondary output electricity simultaneously
Hold and constitutes secondary boost circuits；
Primary boost circuits, secondary boost circuits are reverse interleaved to be connected in parallel the double Boost topological structures of setting composition；
The input terminal of first primary reactor of several primary reactors is connected to input power anode, several primary IGBT
The positive grade end of output after rectification module is connected in parallel is connected to load one end, after several primary IGBT rectification modules are connected in parallel
Output bears grade end and is connected to power cathode；
The input terminal of first grade reactor of several secondary reactors is connected to input power cathode, several secondary IGBT rectifications
The positive grade end of output after wired in parallel connection is connected to positive pole, several secondary IGBT rectification modules be connected in parallel after output
Negative grade end is connected to the load other end；
The preliminary filling electrical circuit is the branch that third contactor and charging resistor are connected in series with composition；
The filter is LC filters, is made of the second reactor, the second capacitance being connected in parallel；
Several primary reactors, secondary reactor, primary IGBT rectification modules, secondary IGBT rectification modules quantity are >=4
Only；
Several primary reactors, secondary reactor core material be iron based nano crystal.
The vehicle-mounted DCDC power supplys of high-efficiency high-power of the present invention pass through the reverse interleaved Boost topology electricity being connected in parallel of two-stage
Road constitutes the DC-DC converter of double Boost topological structures, and the unstable low-voltage that fuel cell is exported is converted to stabilization
High voltage be stored in power battery, for equipment on vehicle and driving motor, power output is efficient, small in volume,
Raw material loss is few, of low cost；Specifically have the beneficial effect that：
1. pair Boost topological structure input sides select LC filters, the input ripple of fuel cell system can control 2% with
It is interior；
2. the inductance of the DC-DC converter of pair Boost topological structures use new iron-based nanocrystalline material iron core, less than
When 50kHZ, one times or more can be reduced, is adopted with 2 to 3 times of work magnetic strength, core volume on the basis of with more low-loss
With the tactic pattern of the multiple windings of magnetic core, i.e., multiple coils are wound on the same iron core, reduce whole reactor size
And weight, copper loss is reduced, product development cost is saved；
3. the voltage value on the DC-DC converter output filter capacitor of pair Boost topological structures is：, greatly reduce the voltage value on output filter capacitor；
4. substantially reducing the ripple current on the boost reactors of front end using the setting of multichannel IGBT module parallel；In IGBT moulds
When block number of parallel reaches 4, efficiency reaches as high as 98% or more, and traditional Boost circuit efficiency only has 90%；
5. the DC-DC converter of pair Boost topological structures can get higher voltage gain, it is more suitable for the low electricity of fuel cell
Pressure input, high voltage output system；
6. circuit structure is simple, component number of species are few, and repair and maintenance is convenient, and nucleus module uses IGBT module, Neng Goushi
20kw or more high power D C-DC power supply product use demands are answered, dilatation ability is strong, meets the power demand of fuel-cell vehicle；
7. the circuit of pair Boost topological structures is similarly applied to other charge and discharge power-supply systems.
Description of the drawings
Fig. 1 is the system structure diagram of the vehicle-mounted DCDC power supplys of high-efficiency high-power of the embodiment of the present invention；
Fig. 2 is the DC/DC conversion section circuit diagrams of the vehicle-mounted DCDC power supplys of high-efficiency high-power of the embodiment of the present invention；
Fig. 3 is that the DC/DC conversion sections of the vehicle-mounted DCDC power supplys of high-efficiency high-power of the embodiment of the present invention simplify circuit diagram.
Specific implementation mode
As shown, a kind of vehicle-mounted DCDC power supplys of the big work(of high efficiency, including can store energy on-vehicle fuel and
Can be mobile unit, driving motor supplies power load power battery, the output cathode of fuel cell through fuse FU1 according to
Secondary to be connected with first contactor KM1, the first reactor L1, the output negative pole of fuel cell is connected with second contactor KM2, and first
It is connected in parallel to preliminary filling electrical circuit between contactor KM1 input terminals and output end, the first reactor L1, second contactor KM2
Output end is connected in parallel to the first capacitance C1, the first capacitance C1 and is connected with filter through DC/DC translation circuits, and filter exports just
Extremely load power battery is connected to through counnter attack diode VD1；
DC/DC translation circuits are provided with several primary reactors being connected in parallel, the respectively first primary reactor L11, second
Primary reactor L12 ... N primary reactor L1N, each primary reactor have been connected respectively a primary IGBT rectifications
Several primary branches of module composition, the first primary reactor L11, the second primary reactor L12 ... N primary reactors L1N
It is primary to be connected respectively the first primary IGBT rectification modules IGBT11, the second primary IGBT rectification module IGBT12 ... N
IGBT rectification modules IGBT1N constitutes N item primary branches, and the output end of N item primary branches is connected to primary output capacitance simultaneously
C11 constitutes primary boost circuits；
DC/DC translation circuits are additionally provided with several secondary reactors being connected in parallel, respectively first grade reactor L21,
Secondary stage reactor L22 ... n-th grade reactors L2N, it is whole that each secondary reactor is connected respectively once grade IGBT
Flow module constitutes several secondary branches, first grade reactor L21, second subprime reactor L22 ... n-th grade reactors
L2N is connected respectively first grade IGBT rectification modules IGBT21, second subprime IGBT rectification module IGBT22 ... n-ths
Grade IGBT rectification modules IGBT2N constitutes N item secondary branches, and the output end of N item secondary branches is connected to secondary output capacitance simultaneously
C12 constitutes secondary boost circuits；
Primary boost circuits, secondary boost circuits are reverse interleaved to be connected in parallel the double Boost topological structures of setting composition.
The input terminal of first primary reactor of several primary reactors is connected to the anode of input power U1, several primary
The positive grade end of output after IGBT rectification modules are connected in parallel is connected to load one end, and several primary IGBT rectification modules are connected in parallel
The cathode that grade end is connected to power supply U1 is born in output afterwards；
The input terminal of first grade reactor of several secondary reactors is connected to the cathode of input power U1, several secondary IGBT
The positive grade end of output after rectification module is connected in parallel is connected to the anode of power supply U1, and several secondary IGBT rectification modules are connected in parallel
Output afterwards bears grade end and is connected to the load other end.
Preliminary filling electrical circuit is the branch that third contactor KM3 and charging resistor R1 is connected in series with composition；
Filter is LC filters, is made of the second reactor L2, the second capacitance C2 being connected in parallel；
Several primary reactors, secondary reactor, primary IGBT rectification modules, secondary IGBT rectification modules quantity is equal >=and 4；
Several primary reactors, secondary reactor core material be iron based nano crystal.
The vehicle-mounted DCDC power supplys of high-efficiency high-power of the present invention pass through the reverse interleaved Boost topology electricity being connected in parallel of two-stage
Road constitutes the DC-DC converter of double Boost topological structures, and the unstable low-voltage that fuel cell is exported is converted to stabilization
High voltage be stored in power battery, for equipment on vehicle and driving motor, power output is efficient, small in volume,
Raw material loss is few, of low cost；Specifically have the beneficial effect that：
1. pair Boost topological structure input sides select LC filters, the input ripple of fuel cell system can control 2% with
It is interior；
2. the inductance of the DC-DC converter of pair Boost topological structures use new iron-based nanocrystalline material iron core, less than
When 50kHZ, one times or more can be reduced, is adopted with 2 to 3 times of work magnetic strength, core volume on the basis of with more low-loss
With the tactic pattern of the multiple windings of magnetic core, i.e., multiple coils are wound on the same iron core, reduce whole reactor size
And weight, copper loss is reduced, product development cost is saved；
3. the voltage value on the DC-DC converter output filter capacitor of pair Boost topological structures is：, greatly reduce the voltage value on output filter capacitor；
4. substantially reducing the ripple current on the boost reactors of front end using the setting of multichannel IGBT module parallel；In IGBT moulds
When block number of parallel reaches 4, efficiency reaches as high as 98% or more, and traditional Boost circuit efficiency only has 90%；
5. the DC-DC converter of pair Boost topological structures can get higher voltage gain, it is more suitable for the low electricity of fuel cell
Pressure input, high voltage output system；
6. circuit structure is simple, component number of species are few, and repair and maintenance is convenient, and nucleus module uses IGBT module, Neng Goushi
20kw or more high power D C-DC power supply product use demands are answered, dilatation ability is strong, meets the power demand of fuel-cell vehicle；
7. the circuit of pair Boost topological structures is similarly applied to other charge and discharge power-supply systems.
Specific technical solution：The high-power transformation of output is stablized in a kind of efficient low-voltage wide scope input, high voltage
Power supply, solution electric vehicle DCDC converting power source volumes are big, the low problem of efficiency.
Because the power demand of the vehicle-mounted DC-DC converter of fuel cell is big, generally all in 30kW or more, so normal shock, instead
Swash, the topological circuit for recommending this kind of suitable 1kW or less power supplys can not meet existing power demand；Because fuel cell is defeated
It is very big to go out voltage fluctuation, usually can from tens volts to three or four hectovolt, bridge type topology efficiency in low-pressure high-power is too low, also not
It is suitble to；Boost type converter is since its circuit is simple, continuous input current, it is efficient the features such as On-Board Vehicle DC/DC Converter lead
Domain is widely applied, but its diode reverse recovery losses are larger, and system effectiveness is caused to reduce.
The DC-DC converter that double Boost reverse interleaved topological structures in parallel are designed on the basis of Boost topologys, will
The unstable low-voltage of fuel cell output, is converted to stable high voltage and is stored in power battery, for equipment on vehicle and
Driving motor is used；The output cathode of fuel cell meets fuse FU1, then connects a positive contactor KM1, the output of fuel cell
Cathode meets contactor KM2, and the output end parallel connection one of the output end and KM2 of reactor a L1, L1 is accessed in the output end of KM1
Capacitance C1, a preliminary filling electrical circuit in parallel between the input terminal and output end of KM1, contactor KM3 and charging resistor R1 series connection
Branch, then using DC/DC translation circuits, output first passes through L2, the filter that C2 is constituted, and output cathode connects a counnter attack
Diode VD1, then connect load power battery.FU1 does short-circuit protection and overload protection in the line；L1, C1 constitute LC filters,
Main function is to reduce input ripple;L2, C2 main function are to reduce output ripple；The effect of VD1 is to prevent electric current from pouring in down a chimney, and is prevented
Stopping power battery is transmitted electricity to fuel cell.
DC/DC conversion section specific technical solutions：
By reactor L11, L12 ... L1N, IGBT module 11, module 12 ... module 1N and output capacitance C11 constitute 1 N
The boost circuits of branch circuit parallel connection.Reactor L11 input termination input powers are positive, after module 11,12 ... 1N Parallel opertations
Anode connects load one end, and the cathode after module 11,12 ... 1N Parallel opertations connects input power cathode；By reactor L21,
L22 ... L2N, IGBT module 21, module 22 ... module 2N and output capacitance C12 constitute the boost of 1 N branch circuit parallel connection
Circuit.Reactor L21 inputs terminate input power cathode, and the anode after module 21,22 ... 2N Parallel opertations connects input power
Anode, the cathode after module 21,22 ... 2N Parallel opertations connect the input load other end.Such 2 road boost circuits constitute reversed
Crisscross parallel topological structure.
IGBT module driving power is small and saturation pressure reduces, and is highly suitable to be applied for the change that DC voltage is 600V or more
The fields such as streaming system such as alternating current generator, frequency converter, Switching Power Supply, lighting circuit, Traction Drive；With energy saving, installation and maintenance side
Just the features such as, heat dissipation is stablized.
Key innovations：
Reverse interleaved double Boost topological structures in parallel are suitable for hydrogen fuel cell DC-DC converter, are also applied for other fuel electricity
Cell system.
The advantages of the technical program being derived with inference mode：
1. fuel cell system in order to protect the performance of battery, often has prodigious requirement to input ripple, general to require control
Within 2%, the input side in reverse interleaved double Boost topological structures in parallel of opening up of the technical program selects LC filters, selection to close
Suitable parameter, can effective solution this problem.
2. the technical program opens up reverse interleaved double Boost topological structures in parallel, the inductance of Boost conversion sections uses
New iron-based nanocrystalline material iron core, when less than 50kHZ, with 2 to 3 times of work magnetic on the basis of with more low-loss
Sense, core volume can be small one times or more；Using a this tactic pattern of the multiple windings of magnetic core, multiple coils are exactly wound on one
On a iron core, entire reactor size and weight can be reduced in this way, reduce copper loss, reduce product development cost.
The output end of 3.DC-DC converters connects vehicle mounted dynamic battery, and general vehicle mounted dynamic battery rated voltage is on the left sides 600V
The right side, fluctuation range maximum is up to 750V, because voltage value is too high, increases the selection difficulty of output filter capacitor；This technology side
Case opens up reverse interleaved double Boost topological structures in parallel, and the voltage value on output filter capacitor is：, greatly reduce the voltage value on output filter capacitor.
4. the topological circuit substantially reduces the ripple on the boost reactors of front end using the scheme of multichannel IGBT parallel connections
Electric current.When IGBT module parallel number reaches 4, efficiency highest, up to 98% or more, and traditional Boost circuit efficiency only has
90%。
5. compared with traditional Boost circuit, which can get higher voltage gain, be more suitable for fuel cell
Low-voltage inputs, high voltage output system.
6. the New Topological scheme, circuit is simple, and device requirement amount is few, easy to maintain, and nucleus module uses IGBT, can use
In 20kw or more high power D C-DC power supply products, dilatation ability is strong, meets the power demand of fuel-cell vehicle.
7. the New Topological scheme is a two-way topology, it is similarly applied to other charge and discharge power-supply systems.
Claims (6)
1. a kind of vehicle-mounted DCDC power supplys of high-efficiency high-power, including the on-vehicle fuel of energy can be stored and can be set to be vehicle-mounted
Standby, driving motor supplies power load power battery, it is characterised in that：The output cathode of fuel cell connects successively through fuse
It is connected to first contactor, the first reactor, the output negative pole of fuel cell is connected with second contactor, first contactor input terminal
Be connected in parallel to preliminary filling electrical circuit between output end, the first reactor, second contactor output end be connected in parallel to first
Capacitance, the first capacitance are connected with filter through DC/DC translation circuits, and filter output cathode end is connected to negative through counnter attack diode
Carry power battery；
DC/DC translation circuits are provided with several primary reactors being connected in parallel, and each primary reactor has been connected respectively
One primary IGBT rectification modules constitute several primary branches, and the output end of several primary branches is connected to primary output capacitance simultaneously
Constitute primary boost circuits；
DC/DC translation circuits are additionally provided with several secondary reactors being connected in parallel, and each secondary reactor is connected respectively
Once grade IGBT rectification modules constitute several secondary branches, and the output end of several secondary branches is connected to secondary output electricity simultaneously
Hold and constitutes secondary boost circuits；
Primary boost circuits, secondary boost circuits are reverse interleaved to be connected in parallel the double Boost topological structures of setting composition.
2. the vehicle-mounted DCDC power supplys of high-efficiency high-power according to claim 1, it is characterised in that：Several primary reactors
The input terminal of first primary reactor is connected to input power anode, several primary IGBT rectification modules be connected in parallel after output
Positive grade end is being connected to load one end, and the output after several primary IGBT rectification modules are connected in parallel bears grade end and is connected to power supply and bears
Pole；
The input terminal of first grade reactor of several secondary reactors is connected to input power cathode, several secondary IGBT rectifications
The positive grade end of output after wired in parallel connection is connected to positive pole, several secondary IGBT rectification modules be connected in parallel after output
Negative grade end is connected to the load other end.
3. the vehicle-mounted DCDC power supplys of high-efficiency high-power according to claim 1, it is characterised in that：The preliminary filling electrical circuit is third
Contactor and charging resistor are connected in series with the branch of composition.
4. the vehicle-mounted DCDC power supplys of high-efficiency high-power according to claim 1, it is characterised in that：The filter filters for LC
Device is made of the second reactor, the second capacitance being connected in parallel.
5. the vehicle-mounted DCDC power supplys of high-efficiency high-power according to claim 1, it is characterised in that：Several primary reactors,
Secondary reactor, primary IGBT rectification modules, secondary IGBT rectification modules quantity >=4.
6. the vehicle-mounted DCDC power supplys of high-efficiency high-power according to claim 1, it is characterised in that：Several primary reactors,
The core material of secondary reactor is iron based nano crystal.
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