CN108512423B - High-efficient high-power vehicle-mounted DCDC power supply - Google Patents
High-efficient high-power vehicle-mounted DCDC power supply Download PDFInfo
- Publication number
- CN108512423B CN108512423B CN201810502133.7A CN201810502133A CN108512423B CN 108512423 B CN108512423 B CN 108512423B CN 201810502133 A CN201810502133 A CN 201810502133A CN 108512423 B CN108512423 B CN 108512423B
- Authority
- CN
- China
- Prior art keywords
- output
- primary
- power
- parallel
- power supply
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 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 20
- 239000000446 fuel Substances 0.000 claims abstract description 48
- 239000003990 capacitor Substances 0.000 claims abstract description 27
- 238000006243 chemical reaction Methods 0.000 claims abstract description 18
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 20
- 239000011162 core material Substances 0.000 claims description 12
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 239000002159 nanocrystal Substances 0.000 claims description 2
- 239000002994 raw material Substances 0.000 abstract description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 6
- 239000001257 hydrogen Substances 0.000 description 6
- 229910052739 hydrogen Inorganic materials 0.000 description 6
- 239000000047 product Substances 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 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
- 230000006698 induction Effects 0.000 description 3
- 239000002707 nanocrystalline material Substances 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- PMVSDNDAUGGCCE-TYYBGVCCSA-L Ferrous fumarate Chemical group [Fe+2].[O-]C(=O)\C=C\C([O-])=O PMVSDNDAUGGCCE-TYYBGVCCSA-L 0.000 description 1
- 238000012356 Product development Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000002955 isolation Methods 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
- 238000010248 power generation Methods 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)
- Fuel Cell (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Dc-Dc Converters (AREA)
Abstract
According to the high-efficiency high-power vehicle-mounted DCDC power supply, the output anode of a vehicle-mounted fuel cell is sequentially connected with a first contactor and a first reactor through a fuse, the output cathode of the fuel cell is connected with a second contactor, the output ends of the first reactor and the second contactor are connected with a first capacitor in parallel, the first capacitor is connected with a filter through a DC/DC conversion circuit, and the output anode of the filter is connected with a load power cell through an anti-reflection diode; the DC/DC conversion circuit is a double Boost topological structure formed by reversely staggered parallel connection of a primary Boost circuit and a secondary Boost circuit; the unstable low voltage output by the fuel cell is converted into stable high voltage to be stored in the power cell for on-board equipment and a driving motor, and the fuel cell has high power output efficiency, small volume, light weight, less raw material loss and low cost.
Description
Technical Field
The invention relates to a high-efficiency high-power vehicle-mounted DCDC power supply.
Background
With the continuous and prominent environmental pollution problem, the traditional petroleum energy source can not meet the power demand of the current automobile industry, and the fuel cell with excellent performance is widely regarded as the best choice of the energy source scheme of the future electric automobile; the fuel cell is a power generation device which directly converts chemical energy existing in fuel and oxidant into electric energy, the fuel of the hydrogen fuel cell is hydrogen and oxygen, and the reaction product of the hydrogen fuel cell is only water, so that the hydrogen fuel cell automobile achieves zero emission and zero pollution in a real sense.
Since the output voltage of the hydrogen fuel cell is low, the fluctuation is large, and the output characteristic is relatively soft; if the fuel cell is used as a direct driving power supply of the electric automobile, a DC-DC converter with harder output characteristics is connected after the fuel cell, and the fuel cell and the DC-DC converter form a unified power supply to supply power to the whole automobile;
the topology scheme of the DC-DC converter in the prior art is mainly divided into an isolated DC/DC topology structure and a non-isolated DC/DC topology structure, wherein the isolated DC/DC topology circuit mainly comprises forward, flyback, push-pull, bridge type, LLC series resonance, derivative topology thereof and the like, and the non-isolated DC/DC topology circuit mainly comprises Buck/Boost, cuk, sepic, derivative topology thereof and the like; the number of topological components of the isolation type converter is large, the occupied space is large, the installation operation is complicated, the power requirement of the fuel cell vehicle-mounted DC-DC converter is large, the power is generally larger than 30kW, and the forward, flyback and push-pull type topological circuit can only be suitable for power sources with power below 1kW and cannot be suitable for the power requirement of the fuel cell vehicle-mounted power source; the fluctuation of the output voltage of the fuel cell is larger, the fluctuation area ranges from tens of volts to three hundred volts, the bridge topology has low efficiency at low voltage and high power, and the bridge topology can not meet the requirement of the vehicle-mounted power supply of the fuel cell; the non-isolated converter has relatively small number of components, small occupied space, simple circuit, continuous input current and high efficiency, but has larger reverse recovery loss of the diode, thus reducing the efficiency of the system.
Disclosure of Invention
The invention aims to solve the technical problem of providing the high-efficiency high-power vehicle-mounted DCDC power supply which can convert unstable low voltage output by a fuel cell into stable high voltage and store the stable high voltage in a power cell to provide power for vehicle-mounted equipment and a driving motor, and has the advantages of high power output efficiency, small size, light weight, less raw material loss and low cost.
The invention relates to a high-efficiency high-power vehicle-mounted DCDC power supply, which comprises a vehicle-mounted fuel cell capable of storing energy and a load power cell capable of providing power for vehicle-mounted equipment and a driving motor, and is characterized in that: the output anode of the fuel cell is sequentially connected with a first contactor and a first reactor through a fuse, the output cathode of the fuel cell is connected with a second contactor, a pre-charging loop is connected in parallel between the input end and the output end of the first contactor, the output ends of the first reactor and the second contactor are connected with a first capacitor in parallel, the first capacitor is connected with a filter through a DC/DC conversion circuit, and the output anode of the filter is connected to a load power battery through an anti-reflection diode;
the DC/DC conversion circuit is provided with a plurality of primary reactors connected in parallel, each primary reactor is correspondingly connected with a primary IGBT rectifying module to form a plurality of primary branches, and the output ends of the plurality of primary branches are simultaneously connected to a primary output capacitor to form a primary boost circuit;
the DC/DC conversion circuit is also provided with a plurality of secondary reactors connected in parallel, each secondary reactor is correspondingly connected with a secondary IGBT rectifying module to form a plurality of secondary branches, and the output ends of the secondary branches are simultaneously connected to a secondary output capacitor to form a secondary boost circuit;
the primary Boost circuits and the secondary Boost circuits are connected in parallel in an inverted staggered manner to form a double Boost topological structure;
the input ends of the first primary reactors of the primary reactors are connected to the positive electrode of an input power supply, the output positive-stage ends of the primary IGBT rectifying modules connected in parallel are connected to one end of a load, and the output negative-stage ends of the primary IGBT rectifying modules connected in parallel are connected to the negative electrode of the power supply;
the input ends of the first secondary reactors of the secondary reactors are connected to the negative electrode of an input power supply, the output positive-stage ends of the secondary IGBT rectifying modules connected in parallel are connected to the positive electrode of the power supply, and the output negative-stage ends of the secondary IGBT rectifying modules connected in parallel are connected to the other end of the load;
the pre-charging loop is a branch circuit formed by connecting a third contactor and a charging resistor in series;
the filter is an LC filter and is composed of a second reactor and a second capacitor which are connected in parallel;
the number of the primary reactors, the secondary reactors, the primary IGBT rectifying modules and the secondary IGBT rectifying modules is more than or equal to 4;
the iron core materials of the primary reactors and the secondary reactors are iron-based nanocrystals.
The high-efficiency high-power vehicle-mounted DCDC power supply forms a DC-DC converter with a double Boost topological structure through the Boost topological circuits which are connected in parallel in a two-stage reverse staggered way, converts unstable low voltage output by the fuel cell into stable high voltage and stores the stable high voltage in the power cell for on-board equipment and a driving motor, and has the advantages of high power output efficiency, small volume, light weight, less raw material loss and low cost; the method has the specific beneficial effects that:
1. the input side of the double Boost topological structure is selected to be an LC filter, and the input ripple of the fuel cell system can be controlled within 2%;
2. the inductance of the DC-DC converter with the double Boost topological structure adopts a novel iron-based nanocrystalline material iron core, and has 2 to 3 times of working magnetic induction on the basis of lower loss when the inductance is lower than 50kHZ, the volume of the magnetic core can be reduced by more than one time, and the structural mode of a plurality of windings of one magnetic core is adopted, namely a plurality of coils are wound on the same iron core, so that the size and the weight of the whole reactor are reduced, the copper loss is reduced, and the development cost of products is saved;
3. the voltage value on the output filter capacitor of the DC-DC converter with the double Boost topological structure is as follows:the voltage value on the output filter capacitor is greatly reduced;
4. the ripple current on the front-end boost reactor is greatly reduced by adopting the parallel arrangement of the multi-channel IGBT modules; when the number of the IGBT modules connected in parallel reaches 4, the highest efficiency can reach more than 98%, and the efficiency of the traditional Boost circuit is only 90%;
5. the DC-DC converter with the double Boost topological structure can obtain higher voltage gain and is more suitable for a low-voltage input and high-voltage output system of the fuel cell;
6. the circuit structure is simple, the number of types of components is small, overhaul and maintenance are convenient, the core module adopts the IGBT module, the use requirement of high-power DC-DC power supply products above 20kw can be met, the capacity expansion capability is strong, and the power requirement of the fuel cell vehicle is met;
7. the circuit with the double Boost topology structure can be applied to other charge and discharge power supply systems as well.
Drawings
FIG. 1 is a schematic diagram of a system architecture of a high-efficiency high-power vehicle-mounted DCDC power supply according to an embodiment of the present invention;
FIG. 2 is a schematic circuit diagram of a DC/DC conversion part of a high-efficiency high-power vehicle-mounted DCDC power supply according to an embodiment of the invention;
fig. 3 is a simplified circuit schematic diagram of a DC/DC conversion portion of a high-efficiency high-power vehicle-mounted DCDC power supply according to an embodiment of the present invention.
Detailed Description
As shown in the figure, the high-efficiency high-power vehicle-mounted DCDC power supply comprises a vehicle-mounted fuel cell capable of storing energy and a load power cell capable of providing power for vehicle-mounted equipment and a driving motor, wherein the output anode of the fuel cell is sequentially connected with a first contactor KM1 and a first reactor L1 through a fuse FU1, the output cathode of the fuel cell is connected with a second contactor KM2, a pre-charging loop is connected in parallel between the input end and the output end of the first contactor KM1, the output ends of the first reactor L1 and the second contactor KM2 are connected with a first capacitor C1 in parallel, the first capacitor C1 is connected with a filter through a DC/DC conversion circuit, and the output anode end of the filter is connected to the load power cell through an anti-reflection diode VD 1;
the DC/DC conversion circuit is provided with a plurality of primary reactors connected in parallel, namely a first primary reactor L11 and a second primary reactor L12 … … Nth primary reactor L1N, each primary reactor is correspondingly connected with a primary IGBT rectifying module to form a plurality of primary branches, the first primary reactor L11 and the second primary reactor L12 … … Nth primary reactor L1N are correspondingly connected with the first primary IGBT rectifying module IGBT11 and the second primary IGBT rectifying module IGBT12 … … Nth primary IGBT rectifying module IGBT1N to form N primary branches, and the output ends of the N primary branches are simultaneously connected to a primary output capacitor C11 to form a primary boost circuit;
the DC/DC conversion circuit is further provided with a plurality of secondary reactors connected in parallel, namely a first secondary reactor L21 and a second secondary reactor L22 … … Nth secondary reactor L2N, each secondary reactor is correspondingly connected with a secondary IGBT rectifying module to form a plurality of secondary branches, the first secondary reactor L21 and the second secondary reactor L22 … … Nth secondary reactor L2N are correspondingly connected with the first secondary IGBT rectifying module IGBT21 and the second secondary IGBT rectifying module IGBT22 … … Nth secondary IGBT rectifying module IGBT2N to form N secondary branches, and the output ends of the N secondary branches are simultaneously connected to a secondary output capacitor C12 to form a secondary boost circuit;
the primary Boost circuits and the secondary Boost circuits are connected in an inverted staggered parallel manner to form a double Boost topological structure.
The input ends of the first primary reactors of the primary reactors are connected to the positive electrode of an input power supply U1, the output positive-stage ends of the primary IGBT rectifying modules connected in parallel are connected to one end of a load, and the output negative-stage ends of the primary IGBT rectifying modules connected in parallel are connected to the negative electrode of the power supply U1;
the input ends of the first secondary reactors of the secondary reactors are connected to the negative electrode of an input power supply U1, the output positive-stage ends of the secondary IGBT rectifying modules connected in parallel are connected to the positive electrode of the power supply U1, and the output negative-stage ends of the secondary IGBT rectifying modules connected in parallel are connected to the other end of the load.
The pre-charging loop is a branch circuit formed by connecting a third contactor KM3 and a charging resistor R1 in series;
the filter is an LC filter and is composed of a second reactor L2 and a second capacitor C2 which are connected in parallel;
the number of the primary reactors, the secondary reactors, the primary IGBT rectifying modules and the secondary IGBT rectifying modules is more than or equal to 4;
iron core materials of the primary reactors and the secondary reactors are iron-based nanocrystalline.
The high-efficiency high-power vehicle-mounted DCDC power supply forms a DC-DC converter with a double Boost topological structure through the Boost topological circuits which are connected in parallel in a two-stage reverse staggered way, converts unstable low voltage output by the fuel cell into stable high voltage and stores the stable high voltage in the power cell for on-board equipment and a driving motor, and has the advantages of high power output efficiency, small volume, light weight, less raw material loss and low cost; the method has the specific beneficial effects that:
1. the input side of the double Boost topological structure is selected to be an LC filter, and the input ripple of the fuel cell system can be controlled within 2%;
2. the inductance of the DC-DC converter with the double Boost topological structure adopts a novel iron-based nanocrystalline material iron core, and has 2 to 3 times of working magnetic induction on the basis of lower loss when the inductance is lower than 50kHZ, the volume of the magnetic core can be reduced by more than one time, and the structural mode of a plurality of windings of one magnetic core is adopted, namely a plurality of coils are wound on the same iron core, so that the size and the weight of the whole reactor are reduced, the copper loss is reduced, and the development cost of products is saved;
3. the voltage value on the output filter capacitor of the DC-DC converter with the double Boost topological structure is as follows:the voltage value on the output filter capacitor is greatly reduced;
4. the ripple current on the front-end boost reactor is greatly reduced by adopting the parallel arrangement of the multi-channel IGBT modules; when the number of the IGBT modules connected in parallel reaches 4, the highest efficiency can reach more than 98%, and the efficiency of the traditional Boost circuit is only 90%;
5. the DC-DC converter with the double Boost topological structure can obtain higher voltage gain and is more suitable for a low-voltage input and high-voltage output system of the fuel cell;
6. the circuit structure is simple, the number of types of components is small, overhaul and maintenance are convenient, the core module adopts the IGBT module, the use requirement of high-power DC-DC power supply products above 20kw can be met, the capacity expansion capability is strong, and the power requirement of the fuel cell vehicle is met;
7. the circuit with the double Boost topology structure can be applied to other charge and discharge power supply systems as well.
The specific technical scheme is as follows: the high-power conversion power supply with high efficiency, low voltage, wide-range input and high voltage stable output solves the problems of large volume and low efficiency of the DCDC conversion power supply of the electric automobile.
Because the power requirement of the fuel cell vehicle-mounted DC-DC converter is large and is generally more than 30kW, topology circuits suitable for power supplies below 1kW, such as forward and flyback, push-pull and the like, cannot meet the existing power requirement; because the output voltage of a fuel cell fluctuates greatly, typically from tens of volts to three-four hundred volts, bridge topologies are too inefficient and unsuitable at low voltages and high power; the Boost converter is widely applied in the field of vehicle-mounted DCDC converters due to the characteristics of simple circuit, continuous input current, high efficiency and the like, but has larger diode reverse recovery loss, so that the system efficiency is reduced.
The DC-DC converter with the double Boost reverse staggered parallel topological structure is designed on the basis of the Boost topology, and unstable low voltage output by the fuel cell is converted into stable high voltage which is stored in the power cell for on-board equipment and a driving motor; the output positive electrode of the fuel cell is connected with a fuse FU1, then is connected with a positive electrode contactor KM1, the output negative electrode of the fuel cell is connected with a contactor KM2, the output end of the KM1 is connected with a reactor L1, the output end of the L1 and the output end of the KM2 are connected with a capacitor C1 in parallel, a precharge circuit is connected between the input end and the output end of the KM1 in parallel, a branch circuit of the contactor KM3 and a charging resistor R1 is connected in series, then the branch circuit passes through a DC/DC conversion circuit, the output positive electrode is connected with an anti-reflection diode VD1 through a filter formed by L2 and C2, and then is connected with a load power battery. FU1 performs short-circuit protection and overload protection in the circuit; l1 and C1 form an LC filter, and the main function of the LC filter is to reduce input ripple, and the main function of L2 and C2 is to reduce output ripple; the VD1 is used for preventing current from flowing backward and preventing the power battery from transmitting power to the fuel battery.
The DC/DC conversion part comprises the following specific technical scheme:
the reactor L11, L12 … … L1N, the IGBT module 11, the module 12 … … module 1N and the output capacitor C11 form a boost circuit with 1N branches connected in parallel. The input end of the reactor L11 is connected with the positive electrode of an input power supply, the positive electrode of the parallel output of the modules 11 and 12 … … N is connected with one end of a load, and the negative electrode of the parallel output of the modules 11 and 12 … … N is connected with the negative electrode of the input power supply; the reactor L21, L22 … … L2N, the IGBT module 21, the module 22 … … module 2N and the output capacitor C12 form a boost circuit with 1N branches connected in parallel. The input end of the reactor L21 is connected with the negative electrode of an input power supply, the positive electrode of the parallel output of the modules 21 and 22 … … N is connected with the positive electrode of the input power supply, and the negative electrode of the parallel output of the modules 21 and 22 … … N is connected with the other end of the input load. Thus, the 2-way boost circuit forms an inverted staggered parallel topology structure.
The IGBT module has small driving power and reduced saturation voltage, and is very suitable for being applied to the fields of variable current systems with the direct current voltage of 600V and above, such as alternating current motors, frequency converters, switching power supplies, lighting circuits, traction transmission and the like; the heat radiator has the characteristics of energy conservation, convenience in installation and maintenance, stable heat dissipation and the like.
Key innovation points are as follows:
the inverted staggered parallel double Boost topology is suitable for hydrogen fuel cell DC-DC converters and other fuel cell systems.
Deducing the advantages of the technical scheme by an inference mode:
1. in order to protect the performance of the battery, the fuel cell system often has great requirements on input ripple, the input ripple is generally required to be controlled within 2 percent, and the LC filter is selected on the input side in the topological structure of the reverse staggered parallel double Boost in the technical scheme, so that the problem can be effectively solved by selecting proper parameters.
2. According to the topological structure of the topological reverse staggered parallel double Boost, the inductance of the Boost conversion part adopts a novel iron-based nanocrystalline material iron core, and when the inductance is lower than 50kHZ, the inductance has 2 to 3 times of working magnetic induction on the basis of lower loss, and the volume of the magnetic core can be reduced by more than one time; by adopting the structural mode of a plurality of windings of one magnetic core, a plurality of coils are wound on one iron core, so that the size and weight of the whole reactor can be reduced, copper loss is reduced, and the product development cost is reduced.
The output end of the DC-DC converter is connected with a vehicle-mounted power battery, the rated voltage of the vehicle-mounted power battery is about 600V, and the fluctuation range can reach 750V at maximum, because the voltage value is too high, the selection difficulty of an output filter capacitor is increased; the topology of the technical scheme is an inverted staggered parallel double Boost topological structure, and the voltage value on the output filter capacitor is as follows:the voltage value on the output filter capacitor is greatly reduced.
4. According to the topological circuit, a scheme of parallel connection of multiple IGBT is adopted, so that ripple current on the front-end boost reactor is greatly reduced. When the number of the IGBT modules connected in parallel reaches 4, the highest efficiency can reach more than 98%, and the efficiency of the traditional Boost circuit is only 90%.
5. Compared with the traditional Boost circuit, the topology circuit can obtain higher voltage gain, and is more suitable for a low-voltage input and high-voltage output system of the fuel cell.
6. The novel topology scheme has the advantages of simple circuit, less device demand and convenient maintenance, the core module adopts the IGBT, can be used for high-power DC-DC power supply products with the power of more than 20kw, has strong capacity expansion capability, and meets the power demand of the fuel cell vehicle.
7. The novel topology scheme is a bidirectional topology and can be applied to other charge and discharge power supply systems.
Claims (6)
1. The utility model provides a high-efficient high-power on-vehicle DCDC power, includes the on-vehicle fuel cell that can store energy and can provide the load power battery of power for on-vehicle equipment, driving motor, its characterized in that: the output anode of the fuel cell is sequentially connected with a first contactor and a first reactor through a fuse, the output cathode of the fuel cell is connected with a second contactor, a pre-charging loop is connected in parallel between the input end and the output end of the first contactor, the output ends of the first reactor and the second contactor are connected with a first capacitor in parallel, the first capacitor is connected with a filter through a DC/DC conversion circuit, and the output anode of the filter is connected to a load power battery through an anti-reflection diode;
the DC/DC conversion circuit is provided with a plurality of primary reactors connected in parallel, each primary reactor is correspondingly connected with a primary IGBT rectifying module to form a plurality of primary branches, and the output ends of the plurality of primary branches are simultaneously connected to a primary output capacitor to form a primary boost circuit;
the DC/DC conversion circuit is also provided with a plurality of secondary reactors connected in parallel, each secondary reactor is correspondingly connected with a secondary IGBT rectifying module to form a plurality of secondary branches, and the output ends of the secondary branches are simultaneously connected to a secondary output capacitor to form a secondary boost circuit;
the primary Boost circuits and the secondary Boost circuits are connected in an inverted staggered parallel manner to form a double Boost topological structure.
2. The efficient high-power on-board DCDC power supply of claim 1, wherein: the input ends of the first primary reactors of the primary reactors are connected to the positive electrode of an input power supply, the output positive-stage ends of the primary IGBT rectifying modules connected in parallel are connected to one end of a load, and the output negative-stage ends of the primary IGBT rectifying modules connected in parallel are connected to the negative electrode of the power supply;
the input ends of the first secondary reactors of the secondary reactors are connected to the negative electrode of an input power supply, the output positive ends of the secondary IGBT rectifying modules connected in parallel are connected to the positive electrode of the power supply, and the output negative ends of the secondary IGBT rectifying modules connected in parallel are connected to the other end of the load.
3. The efficient high-power on-board DCDC power supply of claim 1, wherein: the pre-charging loop is a branch circuit formed by connecting a third contactor and a charging resistor in series.
4. The efficient high-power on-board DCDC power supply of claim 1, wherein: the filter is an LC filter and is composed of a second reactor and a second capacitor which are connected in parallel.
5. The efficient high-power on-board DCDC power supply of claim 1, wherein: the number of the primary reactors, the secondary reactors, the primary IGBT rectifying modules and the secondary IGBT rectifying modules is more than or equal to 4.
6. The efficient high-power on-board DCDC power supply of claim 1, wherein: the iron core materials of the primary reactors and the secondary reactors are iron-based nanocrystals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810502133.7A CN108512423B (en) | 2018-05-23 | 2018-05-23 | High-efficient high-power vehicle-mounted DCDC power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810502133.7A CN108512423B (en) | 2018-05-23 | 2018-05-23 | High-efficient high-power vehicle-mounted DCDC power supply |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108512423A CN108512423A (en) | 2018-09-07 |
| CN108512423B true CN108512423B (en) | 2023-11-10 |
Family
ID=63401060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810502133.7A Active CN108512423B (en) | 2018-05-23 | 2018-05-23 | High-efficient high-power vehicle-mounted DCDC power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108512423B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110682810A (en) * | 2019-09-29 | 2020-01-14 | 深圳威迈斯新能源股份有限公司 | Single-three phase compatible high-efficiency vehicle-mounted bidirectional charger |
| CN110829818A (en) * | 2019-11-18 | 2020-02-21 | 广东美的暖通设备有限公司 | Power supply circuit, control method and device of power supply circuit and air conditioner |
| CN111055689B (en) * | 2020-01-14 | 2023-08-18 | 中车资阳机车有限公司 | Control method for double-branch precharge circuit of pure electric rail locomotive |
| CN113036723A (en) * | 2021-03-30 | 2021-06-25 | 国网河北省电力有限公司雄安新区供电公司 | DC-DC converter and overcurrent protection circuit thereof |
| CN113459812A (en) * | 2021-07-09 | 2021-10-01 | 山东元齐新动力科技有限公司 | Pre-charging device, power battery and pre-charging method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101252290A (en) * | 2008-03-31 | 2008-08-27 | 江苏双登集团有限公司 | Wind power variable pitch UPS system based on super capacitor and control method thereof |
| CN106329914A (en) * | 2015-06-15 | 2017-01-11 | 伊顿公司 | Interleaved parallel DC-DC converter and control method thereof |
| CN208241575U (en) * | 2018-05-23 | 2018-12-14 | 威腾电气集团股份有限公司 | A kind of vehicle-mounted DCDC power supply of high-efficiency high-power |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6349265B2 (en) * | 2015-01-28 | 2018-06-27 | オムロン株式会社 | Bidirectional DC-DC converter, power conditioner, and distributed power supply system |
-
2018
- 2018-05-23 CN CN201810502133.7A patent/CN108512423B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101252290A (en) * | 2008-03-31 | 2008-08-27 | 江苏双登集团有限公司 | Wind power variable pitch UPS system based on super capacitor and control method thereof |
| CN106329914A (en) * | 2015-06-15 | 2017-01-11 | 伊顿公司 | Interleaved parallel DC-DC converter and control method thereof |
| CN208241575U (en) * | 2018-05-23 | 2018-12-14 | 威腾电气集团股份有限公司 | A kind of vehicle-mounted DCDC power supply of high-efficiency high-power |
Non-Patent Citations (1)
| Title |
|---|
| 基于双Boost电路的独立光伏发电系统研究;张飞;刘雅;李洁;孔浩;张玉杰;;电源技术(第05期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108512423A (en) | 2018-09-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108512423B (en) | High-efficient high-power vehicle-mounted DCDC power supply | |
| CN102624234B (en) | A kind of full-bridge three-port direct current converter and control method thereof | |
| CN206211844U (en) | The new two-way DC/DC converters of crisscross parallel | |
| CN208241575U (en) | A kind of vehicle-mounted DCDC power supply of high-efficiency high-power | |
| CN102882370A (en) | Bidirectional two-input BUCK direct-current converter and power distribution method thereof | |
| CN102832809A (en) | Inductance regulating switch capacitor-type passive clamping soft switching high-gain boost-type converter | |
| CN101976953A (en) | Isolated bidirectional DC-DC converter realized by coupling inductor | |
| CN102035382A (en) | Single-magnetic core three-port direct current (DC) converters | |
| CN201797441U (en) | Soft switching insulated bi-directional DC/DC converter with coupling inductor | |
| CN103312168A (en) | Bidirectional double-input ZETA direct-current converter and power distribution method thereof | |
| CN103337961B (en) | A kind of high-voltage variable is than the control method of two-way DC converter | |
| Rezaii et al. | Design and experimental study of a high voltage gain bidirectional dc-dc converter for electrical vehicle application | |
| CN111342664A (en) | Integrated DC-DC converter and control method thereof | |
| CN112968603B (en) | Wide-transformation-ratio transformerless buck-boost converter | |
| CN106655771A (en) | Power supply converter suitable for coach powered by hydrogen proton membrane fuel cell | |
| CN201797440U (en) | Coupling inductance realizing isolated bidirectional direct current-direct current converter | |
| CN111786555B (en) | Zero-ripple high-gain DC-DC converter based on novel boosting unit | |
| CN103490635B (en) | A kind of modified model H bridge buck-boost DC converter and control method thereof | |
| CN102545637B (en) | Buck-boost secondary side regulation three-port direct current converter | |
| CN203608084U (en) | Four-switch boost-buck converter with low ripple | |
| CN102035393A (en) | Four-switch tube three-port converter | |
| CN103312154B (en) | A kind of tandem multi input coupling inductance buck-boost converter | |
| CN115566899A (en) | Bidirectional direct current converter, lithium battery formation system and control method | |
| CN102570836B (en) | Boosting type secondary winding adjustment three-port direct-current converter | |
| CN108768169A (en) | A kind of fuel cell double coupling alternating expression booster converters and its control method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |