CN110588939A - Hybrid power battery device and hybrid power system - Google Patents
Hybrid power battery device and hybrid power system Download PDFInfo
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- CN110588939A CN110588939A CN201911037900.2A CN201911037900A CN110588939A CN 110588939 A CN110588939 A CN 110588939A CN 201911037900 A CN201911037900 A CN 201911037900A CN 110588939 A CN110588939 A CN 110588939A
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- 239000000446 fuel Substances 0.000 claims abstract description 59
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 52
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 52
- 230000002457 bidirectional effect Effects 0.000 claims description 7
- 238000010397 one-hybrid screening Methods 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 16
- 238000006243 chemical reaction Methods 0.000 description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 5
- 239000001257 hydrogen Substances 0.000 description 5
- 229910052739 hydrogen Inorganic materials 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
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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
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/40—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for controlling a combination of batteries and fuel cells
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H21/00—Use of propulsion power plant or units on vessels
- B63H21/12—Use of propulsion power plant or units on vessels the vessels being motor-driven
- B63H21/17—Use of propulsion power plant or units on vessels the vessels being motor-driven by electric motor
-
- 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
- B60L2200/00—Type of vehicles
- B60L2200/32—Waterborne vessels
-
- 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)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Ocean & Marine Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
The embodiment of the invention discloses a hybrid power battery device and a hybrid power system, which are used for providing main power for a ship, and the hybrid power battery device comprises: the fuel cell power supply system comprises a fuel cell power supply module, a lithium cell power supply module and a bus bar, wherein the fuel cell power supply module and the lithium cell power supply module are electrically connected through the bus bar. According to the technical scheme provided by the embodiment of the invention, the hybrid power battery device mixed with the fuel battery and the lithium battery is flexibly configured, so that the requirements of different types of ships on the main power source can be met.
Description
Technical Field
The embodiment of the invention relates to the technical field of ship power supplies, in particular to a hybrid power battery device and a hybrid power system.
Background
With the increasing consumption of traditional energy sources, the hydrogen fuel cell has the characteristics of no pollution, low noise and high efficiency, and has wide application in various power supply fields.
The prior art generally adopts a diesel engine, a steam turbine or a gas turbine as a main power source according to the tonnage and the application of the ship, and the diesel engine, the steam turbine and the gas turbine all adopt a combustion mode to generate energy, and the process is accompanied with the discharge of a large amount of pollutants, and the energy conversion efficiency is not high, so that the energy combination cannot be flexibly carried out according to the requirement of the ship.
Disclosure of Invention
The embodiment of the invention provides a hybrid power battery device and a hybrid power system, which are used for realizing flexible configuration of energy and meeting the requirements of different types of ships on a main power system.
In a first aspect, an embodiment of the present invention provides a hybrid battery device, configured to provide main power for a ship, including: the fuel cell power supply system comprises a fuel cell power supply module, a lithium cell power supply module and a bus bar, wherein the fuel cell power supply module and the lithium cell power supply module are electrically connected through the bus bar.
Optionally, the fuel cell power supply module includes a fuel cell and a first DC/DC converter, the fuel cell is electrically connected to an input terminal of the first DC/DC converter, and an output terminal of the first DC/DC converter is electrically connected to the bus bar;
the lithium battery power supply module comprises a lithium battery pack and a second DC/DC converter, the lithium battery pack is electrically connected with the input end of the second DC/DC converter, and the output end of the second DC/DC converter is electrically connected with the bus bar.
Optionally, the ratio of the output power of the fuel cell to the output power of the lithium battery is between 0.8 and 1.6.
Optionally, the first DC/DC converter is a unidirectional DC/DC converter, and the second DC/DC converter is a bidirectional DC/DC converter.
Optionally, the hybrid battery device further includes a first switch, and the first DC/DC converter is electrically connected to the bus bar through the first switch; and/or the hybrid battery device further includes a second switch through which the second DC/DC converter is electrically connected to the bus bar.
In a second aspect, an embodiment of the present invention further provides a hybrid power system, where the hybrid power system includes at least one section of direct current bus and at least one hybrid power battery device provided in an embodiment of the present invention, an output end of the hybrid power battery device is electrically connected to the direct current bus, and each section of the direct current bus is provided with at least one hybrid power battery device;
when the hybrid power system comprises a plurality of sections of the direct current buses, the direct current buses of the sections are electrically connected through a switch module.
Optionally, the switch module includes a fuse and a disconnecting switch connected in series.
Optionally, the number of the hybrid battery devices included in the hybrid system is 2 to 8.
Optionally, the hybrid power system comprises an even number of hybrid power battery devices.
Optionally, when the hybrid system includes a plurality of segments of the dc bus, the number of the hybrid battery devices on each segment of the dc bus is equal.
According to the embodiment of the invention, the hybrid power battery device of the lithium battery and the fuel battery is adopted to provide a main power source for the ship, the hybrid power battery device comprises a fuel battery power supply module, a lithium battery power supply module and a bus bar, and the fuel battery is used as a power output power source, so that the conversion efficiency of energy sources can be improved; the lithium battery can be used as a power output power supply and a power absorption power supply, and the output ratio of energy sources can be reasonably configured. According to the technical scheme provided by the embodiment of the invention, the hybrid power battery device mixed with the fuel battery and the lithium battery is flexibly configured, so that the requirements of different types of ships on the main power source can be met.
Drawings
Fig. 1 is a block diagram of a hybrid battery device according to an embodiment of the present invention;
fig. 2 is a block diagram of another hybrid battery device according to an embodiment of the present invention;
FIG. 3 is a topology diagram of a hybrid powertrain system provided by an embodiment of the present invention;
FIG. 4 is a topology diagram of another hybrid powertrain system provided by an embodiment of the present invention;
FIG. 5 is a topology diagram of another hybrid powertrain system provided by an embodiment of the present invention;
FIG. 6 is a topology diagram of another hybrid powertrain system provided by an embodiment of the present invention;
FIG. 7 is a topology diagram of another hybrid powertrain system provided by an embodiment of the present invention;
fig. 8 is a topology diagram of another hybrid system according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a block diagram of a hybrid battery device 100 according to an embodiment of the present invention, where the hybrid battery device 100 is used for providing main power for a ship, and referring to fig. 1, the hybrid battery device 100 includes a fuel cell power supply module 10, a lithium battery power supply module 20, and a bus bar 30, and the fuel cell power supply module 10 and the lithium battery power supply module 20 are electrically connected through the bus bar 30.
Specifically, the fuel cell power supply module 10 is configured to output the electric energy generated by the fuel cell to the bus bar 30, wherein the fuel cell may be a hydrogen fuel cell; the lithium battery power supply module 20 is used for outputting the electric energy generated by the lithium battery to the bus bar 30, or storing the redundant electric energy on the bus bar 30. The bus bar 30 may be disposed on the distribution board, and the bus bar 30 is used to electrically connect the fuel cell power supply module 10 and the lithium battery power supply module 20 together, and transmit the electric energy generated by the fuel cell power supply module 10 and the lithium battery power supply module 20 to the bus bar to provide a main power source for a main power system of a ship, and the three components together form the hybrid power battery apparatus 100.
According to the technical scheme provided by the embodiment of the invention, the main power source is provided for the ship by adopting the hybrid power battery device of the lithium battery and the fuel battery, the hybrid power battery device comprises a fuel battery power supply module, a lithium battery power supply module and a busbar, and the fuel battery is used as a power output power source, so that the conversion efficiency of energy sources can be improved; the lithium battery can be used as a power output power supply and a power absorption power supply, and the output ratio of energy sources can be reasonably configured. According to the technical scheme provided by the embodiment of the invention, the hybrid power battery device mixed with the fuel battery and the lithium battery is flexibly configured, so that the requirements of different types of ships on the main power source can be met.
Fig. 2 is a block diagram of another hybrid battery device according to an embodiment of the present invention, and referring to fig. 2, on the basis of the above embodiment, a fuel cell power supply module 10 includes a fuel cell 101 and a first DC/DC converter 102, the fuel cell 101 is electrically connected to an input terminal of the first DC/DC converter 102, and an output terminal of the first DC/DC converter 102 is electrically connected to a bus bar 30;
the lithium battery power supply module 20 includes a lithium battery pack 201 and a second DC/DC converter 202, the lithium battery pack 201 is electrically connected to an input terminal of the second DC/DC converter 202, and an output terminal of the second DC/DC converter 202 is electrically connected to the bus bar 30.
Specifically, the fuel cell power supply module 10 may include a fuel cell 101 and a first DC/DC converter 102, where the fuel cell 101 may be a hydrogen fuel cell, and the hydrogen fuel cell is a power generation device that directly converts chemical energy of hydrogen and oxygen into electric energy, and has the characteristics of high conversion efficiency, no pollution, and low noise, and is suitable for use in a ship or other places with a small space. The first DC/DC converter 102 converts the voltage output from the fuel cell 101 into a voltage required by the main power system of the ship to meet the demand of the main power system. The lithium battery power supply module 20 may include a lithium battery pack 201 and a second DC/DC converter 202, where the lithium battery pack 201 may be charged or discharged, may flexibly adjust electric energy on the bus bar 30, and may store redundant electric energy according to a requirement of the main power system. The second DC/DC converter 202 may be a bidirectional DC/DC converter to enable bidirectional flow of energy between the lithium battery pack 201 and the bus bar 30.
Optionally, on the basis of the above embodiment, the first DC/DC converter is a unidirectional DC/DC converter, and the second DC/DC converter is a bidirectional DC/DC converter. Since the fuel cell 101 is a power generating device that cannot store electric energy, the direction of energy transmission thereof is not reversible, and only the unidirectional DC/DC converter is required to convert and transmit energy between the fuel cell 101 and the bus bar 30. The lithium battery pack 201 can release the stored electric energy, so that the bidirectional flow of the energy between the lithium battery pack 201 and the bus bar 30 is realized by arranging the bidirectional DC/DC converter, so that the utilization rate of the energy is improved.
Optionally, on the basis of the above embodiment, the hybrid battery device 100 further includes a first switch 40, and the first DC/DC converter 102 is electrically connected to the bus bar 30 through the first switch 40; and/or the hybrid battery device 100 further includes a second switch 50, and the second DC/DC converter 202 is electrically connected to the bus bar 30 through the second switch 50.
Specifically, by arranging the first switch 40 between the fuel cell power supply module 10 and the bus bar 30 and/or arranging the second switch 50 between the lithium battery power supply module 20 and the bus bar 30, the power supply mode of the hybrid power battery device 100 can be flexibly set according to the requirement of the main power system of the ship, so that the requirement of different types of ships on the main power source can be met, and the energy saving is facilitated. The first switch 40 may include 2 switches respectively disposed at the positive and negative output terminals of the first DC/DC converter, or 1 switch connected between the positive output terminal of the first DC/DC converter and the bus bar 30. The second switch 50 may be provided in the same manner as the first switch 40. The first switch 40 and the second switch 50 may be manual switches or automatic switches.
Furthermore, the ratio of the output power of the fuel cell to the output power of the lithium battery pack is between 0.8 and 1.6.
Specifically, the ratio of the output power of the fuel cell 101 to the output power of the lithium cell 201 in the hybrid battery device 100 is the core of the entire hybrid battery device 100, and the output power of the hybrid battery device 100 is affected not only by the power output characteristics of the fuel cell 101 but also by the charge/discharge rate and capacity of the lithium cell pack 201 and also by the load power of the ship as a whole. Through a large amount of experimental research and accumulation of experimental data, technicians find that when the ratio of the output power of the marine fuel cell 101 to the output power of the lithium battery pack 201 is 0.8-1.6, the maximum utilization of energy can be realized, and the optimal output performance is achieved.
By setting the ratio of the output power of the fuel cell 101 to the output power of the lithium battery pack 201 to be 0.8-1.6, the hybrid power battery device 100 provided by the embodiment of the invention has the following properties:
(1) the starting device has stable starting performance, and under the conditions that the loads are respectively 0%, 25%, 75% and 100% of rated power, the time interval of each starting is not more than 2min, and the correct starting can be realized for at least 10 times continuously.
(2) The voltage output performance is stabilized when the load is increased steadily, the load is increased by 5% load each time in sequence from 0% of rated power, the load time interval is increased by 2min each time until the load is increased to 100%, and the voltage output by the hybrid power battery device 100 meets the requirement of changing within the range of +/-5% rated voltage.
(3) The voltage output performance is stabilized when the load is reduced stably, the load is reduced by 5% from 100% of rated power in sequence, the load is reduced by 2min at each time, until the load is reduced to 0%, and the voltage output by the hybrid power battery device 100 is changed within the range of +/-5% of rated voltage.
(4) And the voltage stabilizing circuit has the performance of stabilizing voltage output when the load is suddenly increased. The load is increased to 60% from 0.5s of the rated power, the load is increased to 70% from 0.5s of the rated power, the load is increased to 80% from 0.5s of the rated power, the load is increased to 90% from 0.5s of the rated power, the load is increased to 100% from 0.5s of the rated power, the voltage output by the hybrid battery device 100 meets the requirements that the change rate of the transient voltage is not more than-15% at minimum, is not more than + 20% at maximum, and the stabilization time is not more than 1.5 s.
(5) And has stable voltage output performance when the load is suddenly reduced. The load is reduced to 40% within 0.5s from 100% of the rated power, the load is reduced to 30% within 0.5s from 90% of the rated power, the load is reduced to 20% within 0.5s from 80% of the rated power, the load is reduced to 10% within 0.5s from 70% of the rated power, the load is reduced to 0% within 0.5s from 60% of the rated power, the voltage output by the hybrid battery device 100 meets the condition that the change rate of the transient voltage is not more than-15% at least, is not more than + 20% at most, and the stabilization time is not more than 1.5 s.
(6) The hybrid power battery device 100 has overload performance, and can stably run for at least 15min when the load is 110% of rated power.
According to the technical scheme provided by the embodiment of the invention, the main power source is provided for the ship by adopting the hybrid power battery device of the lithium battery and the fuel battery, the hybrid power battery device comprises a fuel battery power supply module, a lithium battery power supply module and a busbar, and the fuel battery is used as a power output power source, so that the conversion efficiency of energy sources can be improved; the lithium battery can be used as a power output power supply and a power absorption power supply, can reasonably configure the output ratio of energy sources, and can realize the performance of outputting stable voltage under the conditions of stable increase or decrease of loads, sudden load change and overload. According to the technical scheme provided by the embodiment of the invention, the hybrid power battery device mixed with the fuel battery and the lithium battery is flexibly configured, so that the requirements of different types of ships on the main power source can be met, and the stable main power source is provided for the ships.
Further, an embodiment of the present invention further provides a hybrid power system, where the hybrid power system includes at least one section of direct current bus and at least one hybrid power battery device provided in the above embodiment, an output end of the hybrid power battery device is electrically connected to the direct current bus, and each section of direct current bus is provided with at least one hybrid power battery device;
when the hybrid power system comprises a plurality of sections of direct current buses, the direct current buses are electrically connected through the switch module.
Specifically, the hybrid power system is used for providing main power for the ship, can be formed by randomly combining a plurality of hybrid power battery devices, and can flexibly adapt to ships with different tonnages by arranging a plurality of sections of direct current buses so as to meet the requirements of different types of ships on power sources. The multiple dc buses may be electrically connected through a switch module, for example, the switch module may include a fuse and a disconnector connected in series.
Optionally, the hybrid system comprises 2-8 hybrid battery devices.
Specifically, according to experimental research of technicians in the present application, it is found that the hybrid battery devices can be combined in any combination theoretically according to the requirements of ship power loads, but under the condition of considering the complexity of a power system, through a large amount of test data expressions, the hybrid battery devices provided by 8 groups of the above embodiments are combined at most, and the hybrid battery devices are combined at least by 2 groups.
Optionally, when the hybrid power system includes multiple segments of dc buses, the number of hybrid battery devices on each segment of dc bus is equal.
Specifically, the embodiment of the invention can be provided with a plurality of sections of direct current buses, the direct current buses can be electrically connected by adopting the switch module, and the switch module can comprise a fuse wire and an isolating switch. In order to meet the symmetry requirement of the power source, the number of the hybrid battery devices on each section of the bus is equal, so that the hybrid power system comprises an even number of hybrid battery devices, namely, the power source is configured in a combination manner of 2 groups, 4 groups, 6 groups and 8 groups.
For convenience of description, the multiple segments of dc buses may be referred to as a first segment of dc bus, a second segment of dc bus … … and an nth segment of dc bus, respectively.
Optionally, fig. 3 is a topology diagram of a hybrid system according to an embodiment of the present invention, and with reference to fig. 3, the hybrid system includes two segments of dc buses and two sets of hybrid battery devices 100, where each segment of dc bus is connected to one set of hybrid battery device 100, and the two segments of dc buses are electrically connected through a switch module 70.
Specifically, the switch module 70 includes a fuse 71 and a disconnector 72 connected in series, and the first-stage dc bus 1 and the second-stage dc bus 2 are respectively electrically connected to a set of hybrid battery devices 100, and this combination method may be applied to a main power source of a ship with a tonnage of less than 1 kiloton. The output ends of the first section of direct current bus 1 and the second section of direct current bus 2 can be connected with different loads, for example, the loads can be propellers, double-winding motors or daily lighting equipment, and the like, wherein the supply voltage of the daily lighting equipment needs to be reduced through an isolation transformer.
Optionally, fig. 4 is a topology diagram of another hybrid system provided by an embodiment of the present invention, and referring to fig. 4, on the basis of the above embodiment, the hybrid system includes two segments of direct current buses and four groups of hybrid battery devices 100, two groups of hybrid battery devices 100 are respectively connected to each segment of direct current bus, and the two segments of direct current buses are electrically connected through a switch module 70.
Specifically, the output ends of the first section of direct current bus 1 and the second section of direct current bus 2 can be respectively connected with different loads, each section of direct current bus is electrically connected with two groups of hybrid power battery devices 100, the two sections of direct current buses are electrically connected through a switch module 70, and the switch module comprises a fuse 71 and a disconnecting switch 72 which are connected in series, so that the reliability of the hybrid power system is improved. When a load connected with the first section of direct current bus 1 needs large power, the second section of direct current bus 2 and the first section of direct current bus 1 can jointly supply power to the load to provide enough main power, so that compared with the prior art, the technical scheme provided by the embodiment of the invention can flexibly configure the hybrid power system by properly adding or reducing the hybrid power battery devices 100 and setting the output power proportion of each hybrid power battery device 100 so as to meet the requirements of different types of ships on power sources.
Optionally, fig. 5 is a topology diagram of another hybrid system according to an embodiment of the present invention, and with reference to fig. 5, the hybrid system includes two segments of dc buses and six groups of hybrid battery devices 100, where each segment of dc bus is connected to three groups of hybrid battery devices 100, and the two segments of dc buses are electrically connected through a switch module 70. This combination has the same advantages as the hybrid system provided by the above embodiment, and will not be described in detail here.
Optionally, fig. 6 is a topology diagram of another hybrid system according to an embodiment of the present invention, and with reference to fig. 6, the hybrid system includes two segments of dc buses and eight groups of hybrid battery devices 100, where each segment of dc bus is connected to four groups of hybrid battery devices 100, and the two segments of dc buses are electrically connected through a switch module 70. This combination has the same advantages as the hybrid system provided by the above embodiment, and will not be described in detail here.
Optionally, fig. 7 is a topology diagram of another hybrid system according to an embodiment of the present invention, and with reference to fig. 7, the hybrid system includes three segments of dc buses and six groups of hybrid battery devices 100, where each segment of dc bus is respectively connected to two groups of hybrid battery devices 100, and the three segments of dc buses are electrically connected through a switch module 70.
Specifically, the combined method can be used in a main power system with a ship tonnage of more than 1 kiloton and less than 8 kilotons, the output ends of the first section of direct current bus 1, the second section of direct current bus 2 and the third section of direct current bus 3 can be respectively connected with different loads, each section of direct current bus is electrically connected with two groups of hybrid power battery devices 100, when the load connected with the first section of direct current bus 1 needs larger power, the second section of direct current bus 2 and the first section of direct current bus 1 can jointly supply power to the load, or the three sections of direct current buses jointly supply power to the load, so as to provide enough main power. Certainly, each section of the direct current bus does not need to be in a state of providing main power for the ship, for example, the third section of the direct current bus 3 may be in a hot standby state, and when the ship needs large main power, the hybrid power battery device 100 electrically connected with the third section of the direct current bus 3 may be in an operating state by closing the switch module 70 between the second section of the direct current bus 2 and the third section of the direct current bus 3, so as to provide sufficient power for the hybrid power system, and such a combination mode is favorable for improving the reliability of the hybrid power system.
Optionally, fig. 8 is a topology diagram of another hybrid system according to an embodiment of the present invention, and with reference to fig. 8 on the basis of the above embodiment, the hybrid system includes four segments of dc buses and eight groups of hybrid battery devices 100, where each segment of dc bus is connected to two groups of hybrid battery devices 100, and the four segments of dc buses are electrically connected through a switch module 70. The combination mode is suitable for ships with tonnage of 8-12 kilotons, and can provide larger main power for the ships.
According to the embodiment of the invention, the hybrid power battery device of the lithium battery and the fuel battery is adopted to provide a main power source for the ship, the hybrid power battery device comprises a fuel battery power supply module, a lithium battery power supply module and a bus bar, and the fuel battery is used as a power output power source, so that the conversion efficiency of energy sources can be improved; the lithium battery can be used as a power output power supply and a power absorption power supply, can reasonably configure the output ratio of energy sources, and can realize the performance of outputting stable voltage under the conditions of stable increase or decrease of loads, sudden load change and overload. According to the technical scheme provided by the embodiment of the invention, different hybrid power systems are formed by flexibly configuring the hybrid power battery devices mixed with the fuel batteries and the lithium batteries, and the hybrid power systems can be flexibly configured by properly increasing or reducing the hybrid power battery devices and setting the output power ratio of each hybrid power battery device so as to meet the requirements of different types of ships on the main power source.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A hybrid battery device for providing primary power to a marine vessel, comprising: the fuel cell power supply system comprises a fuel cell power supply module, a lithium cell power supply module and a bus bar, wherein the fuel cell power supply module and the lithium cell power supply module are electrically connected through the bus bar.
2. The hybrid battery device according to claim 1, wherein the fuel cell power module includes a fuel cell and a first DC/DC converter, the fuel cell being electrically connected to an input terminal of the first DC/DC converter, an output terminal of the first DC/DC converter being electrically connected to the bus bar;
the lithium battery power supply module comprises a lithium battery pack and a second DC/DC converter, the lithium battery pack is electrically connected with the input end of the second DC/DC converter, and the output end of the second DC/DC converter is electrically connected with the bus bar.
3. The hybrid battery device according to claim 2, wherein the ratio of the output power of the fuel cell to the output power of the lithium battery pack is between 0.8 and 1.6.
4. The hybrid battery device according to claim 2, wherein the first DC/DC converter is a unidirectional DC/DC converter, and the second DC/DC converter is a bidirectional DC/DC converter.
5. The hybrid battery device according to claim 2, further comprising a first switch through which the first DC/DC converter is electrically connected to the bus bar; and/or the hybrid battery device further includes a second switch through which the second DC/DC converter is electrically connected to the bus bar.
6. A hybrid power system, characterized in that the hybrid power system comprises at least one section of direct current bus and at least one hybrid power battery device according to any one of claims 1 to 5, the output end of the hybrid power battery device is electrically connected with the direct current bus, and each section of the direct current bus is provided with at least one hybrid power battery device;
when the hybrid power system comprises a plurality of sections of the direct current buses, the direct current buses of the sections are electrically connected through a switch module.
7. The hybrid system of claim 6, wherein the switch module includes a fuse and a disconnect switch in series.
8. The hybrid system according to claim 6, characterized in that the hybrid system includes the hybrid battery device in a number of 2-8.
9. The hybrid system according to claim 8, characterized in that the hybrid system includes an even number of the hybrid battery devices.
10. The hybrid system of claim 6, wherein when the hybrid system includes a plurality of sections of the dc bus, the number of hybrid battery devices on each section of the dc bus is equal.
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