CN111130167A - Voltage conversion apparatus for hydrogen fuel cell - Google Patents
Voltage conversion apparatus for hydrogen fuel cell Download PDFInfo
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- CN111130167A CN111130167A CN201911183527.1A CN201911183527A CN111130167A CN 111130167 A CN111130167 A CN 111130167A CN 201911183527 A CN201911183527 A CN 201911183527A CN 111130167 A CN111130167 A CN 111130167A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
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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
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/70—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by fuel cells
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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
- B60L58/30—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
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- 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
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- 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)
Abstract
The invention discloses a voltage conversion device of a hydrogen fuel cell, which comprises an integration box and a circuit board positioned in the integration box, wherein the integration box is provided with a power interface, a communication interface, a high-voltage output interface and a low-voltage output interface; the circuit board is integrated with an internal power supply, a control device, a voltage boosting device and a voltage reducing device which are respectively in communication connection with the control device, and the internal power supply is respectively electrically connected with a power interface and the control device so as to supply power to the control device; the control device is also in communication connection with the communication interface; the input end of the boosting device is electrically connected with the power interface, and the output end of the boosting device is electrically connected with the high-voltage output interface; the input end of the voltage reduction device is connected with the power interface, and the output end of the voltage reduction device is electrically connected with the low-voltage output interface. The invention is beneficial to improving the integration level of the hydrogen fuel cell power supply system and reducing the peripheral circuits of the hydrogen fuel cell power supply system.
Description
Technical Field
The invention relates to the technical field of hydrogen fuel cells, in particular to voltage conversion equipment of a hydrogen fuel cell.
Background
As is well known, a hydrogen fuel cell is a clean energy source using hydrogen as fuel, and the hydrogen fuel cell is also one of the development directions of the clean energy source in the future.
The existing hydrogen fuel cell power supply system generally comprises a hydrogen fuel cell stack system, a boosting component, a voltage reducing component, a high-voltage control distribution box, a low-voltage control distribution box and a cell management system component. The electric energy generated by the hydrogen fuel electric pile enters the high-voltage adapter box after being boosted by the boosting component. The interior of the high-voltage adapter box is divided into two paths, one path enters a BMS (battery management system) and the other path enters a DCL (voltage reduction module) to be reduced into 24V to drive a stack cooling fan.
However, in the existing scheme, the voltage boosting component and the voltage reducing component are independent components, so that the hydrogen fuel cell power supply system has the problems of multiple connecting lines and large occupied space.
Disclosure of Invention
The invention mainly aims to provide a voltage conversion device of a hydrogen fuel cell, aiming at solving the technical problems of more connecting lines and large occupied space of the existing hydrogen fuel cell power supply system.
In order to achieve the above object, the present invention provides a voltage conversion device for a hydrogen fuel cell, the voltage conversion device includes an integrated box and a circuit board located inside the integrated box, the integrated box is provided with a power interface, a communication interface, a high voltage output interface and a low voltage output interface, and the power interface can be electrically connected with an output terminal of the hydrogen fuel cell; an internal power supply, a control device, and a voltage boosting device and a voltage reducing device which are respectively in communication connection with the control device are integrated on the circuit board, the input end of the internal power supply is electrically connected with the power interface, and the output end of the internal power supply is electrically connected with the control device so as to supply power to the control device; the control device is also in communication connection with the communication interface; the input end of the boosting device is electrically connected with the power interface, and the output end of the boosting device is electrically connected with the high-voltage output interface; the input end of the voltage reduction device is connected with the power interface, and the output end of the voltage reduction device is electrically connected with the low-voltage output interface.
Preferably, the voltage conversion device further comprises a positive contactor and a negative contactor arranged in the integrated box, the positive contactor and the negative contactor are further in communication connection with the control device, and the positive electrode of the power interface is respectively and electrically connected with the positive electrodes of the input ends of the internal power supply, the voltage boosting device and the voltage reducing device through the positive contactor; and the negative electrode of the power interface is respectively and electrically connected with the negative electrodes of the input ends of the internal power supply, the boosting device and the voltage reduction device through the negative electrode contactor.
Preferably, a pre-charging circuit which is in communication connection with the control device and used for protecting the anode contactor is further integrated on the circuit board, the input end of the pre-charging circuit is electrically connected with the input end of the anode contactor, and the output end of the pre-charging circuit is electrically connected with the output end of the anode contactor.
Preferably, a discharging circuit which is in communication connection with the control device and is used for releasing residual electric energy of the hydrogen fuel cell system is further integrated on the circuit board, an input end of the discharging circuit is electrically connected with an output end of the positive contactor, and an output end of the discharging circuit is electrically connected with an input end of the negative contactor.
Preferably, the integrated box further comprises a cold water pipe arranged in the integrated box, and a water inlet connector and a water outlet connector which are respectively connected with two ends of the cold water pipe are correspondingly arranged on the integrated box.
Preferably, the cooling water system further comprises a first temperature sensor for detecting the temperature of the cooling liquid in the cold water pipe, and the first temperature sensor is in communication connection with the control device.
Preferably, the integrated box further comprises a second temperature sensor for detecting the temperature inside the integrated box, and the second temperature sensor is in communication connection with the control device.
Preferably, a first copper bar for transmitting voltage is arranged between the power interface and the voltage boosting device and between the power interface and the voltage reducing device respectively; and a second copper bar for transmitting voltage is arranged between the boosting device and the high-voltage output interface.
Preferably, the surface of the integration box is provided with a plurality of heat dissipation fins.
Preferably, the integrated box is further provided with a plurality of mounting seats, the mounting seats are arranged around the integrated box, and the mounting seats are provided with through holes for screws to pass through.
The invention has the beneficial effects that: according to the voltage conversion equipment of the hydrogen fuel cell, the control device, the voltage boosting device and the voltage reducing device are integrated in the integrated box, and the voltage boosting device and the voltage reducing device are respectively controlled to operate through one control device, so that the integration level of a hydrogen fuel cell power supply system is improved, peripheral circuits of the hydrogen fuel cell power supply system are reduced, and the structural design difficulty of the hydrogen fuel cell power supply system is reduced.
Drawings
Fig. 1 is a schematic structural view of an embodiment of a voltage conversion apparatus of a hydrogen fuel cell of the present invention;
fig. 2 is a logical relationship diagram of functional blocks of the voltage conversion apparatus of the hydrogen fuel cell of the invention;
fig. 3 is a schematic diagram of electrical connection relationships among the voltage boosting device, the voltage reducing device, the bleeder circuit, the pre-charge circuit, the positive contactor, and the negative contactor of the voltage conversion apparatus shown in fig. 2.
Detailed Description
In the following, the embodiments of the present invention will be described in detail with reference to the drawings in the following, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a voltage conversion device of a hydrogen fuel cell, which comprises an integration box 10 and a circuit board 20 positioned inside the integration box 10, wherein the integration box 10 is provided with a power interface 11, a communication interface 12, a high-voltage output interface 13 and a low-voltage output interface 14, and the power interface 11 can be electrically connected with the output end of the hydrogen fuel cell; an internal power supply 21, a control device 22, and a voltage boosting device 23 and a voltage dropping device 24 which are respectively in communication connection with the control device 22 are integrated on the circuit board 20, an input end of the internal power supply 21 is electrically connected with the power interface 11, and an output end of the internal power supply 21 is electrically connected with the control device 22 so as to supply power to the control device 22; the control device 22 is also electrically connected with the communication interface 12; the input end of the boosting device 23 is electrically connected with the power interface 11, and the output end of the boosting device 23 is electrically connected with the high-voltage output interface 13; the input end of the voltage reducing device 24 is connected with the power interface 11, and the output end of the voltage reducing device 24 is electrically connected with the low-voltage output interface 14.
In this embodiment, as shown in fig. 1, the size of the integration box 10 may be set according to actual conditions, and preferably, the integration box 10 is a rectangular box-shaped body, and the integration box 10 is preferably surrounded by an aluminum substrate. The integrated box 10 is provided with a power supply interface 11, a communication interface 121, a high-voltage output interface 13 and a low-voltage output interface 14, preferably all the interfaces are located on the same side surface of the periphery of the integrated box 10, the form of each interface can be the form of the existing matched type, and at the moment, each interface preferably adopts a waterproof joint. The power interface 11 is used for electrically connecting with the voltage output end of the fuel cell, and the part of the power interface 11 located inside the integrated box is divided into three parts, which respectively supply power to the voltage boosting device 23, the control device 22 and the voltage reducing device 24. The communication interface 12 is used for communication with an automobile computer or a fuel cell control system to facilitate information transmission between the voltage conversion device and an external component. The high voltage output interface 13 may be electrically connected to a power battery BMS (power battery management system) or a power plant to drive the vehicle. The low voltage interface 14 may be electrically connected to a low voltage power source within the fuel cell system for operation of the various low voltage components.
As shown in fig. 2, an internal power supply 21, a control device 22, a voltage step-up device 23, and a voltage step-down device 24 are integrated on a circuit board 20, and the respective components can be arranged by using an existing device. Because the voltage of the output voltage of the fuel cell is generally 100-250V, the voltage output by the fuel cell needs to be transformed and then output to the control device for use, the internal power supply 21 is used for providing a stable low-voltage direct-current power supply for the control device 22 to operate, at this time, the input end of the internal power supply 21 is electrically connected with the power supply interface 11, the output end of the internal power supply 21 is electrically connected with the power supply interface of the control device 22, and the internal power supply 21 can select a power supply with a corresponding specification according to actual requirements. Of course, the control device 22 may be powered by the step-down device 24 outputting a low voltage to power the control device 22. The control device 22 may be implemented by a conventional control chip, such as a vehicle-grade 32-bit single chip computer (supporting floating point operation). The connection between the control device 22 and the communication interface 12 is preferably a CAN bus. When present step-up part and step-down part all regard as independent part, need encapsulate it respectively to be connected with other parts through many cables, need set up control chip in step-up part and step-down part simultaneously, with the step-up and step-down of control voltage. In the embodiment, the voltage boosting device 23 and the voltage reducing device 24 are integrated in the integrated box 10 for uniform packaging, so that the packaging number and the occupied space of the voltage boosting device 23 and the voltage reducing device 24 are reduced, and the structure of the voltage conversion equipment is more compact. The control device 22 may be disposed between the voltage boosting device 23 and the voltage dropping device 24 to implement a control function, and control the voltage boosting device 23 to boost the voltage input by the power supply to the voltage required by the power battery, and control the voltage dropping device 24 to drop the voltage, so as to be used by the low-voltage components of the hydrogen fuel system, such as the heat dissipation system of the fuel battery, reduce the peripheral circuits of the voltage conversion system, and reduce the difficulty of the structural design. The step-up device 23 and the step-down device 24 may be small transformers, the voltage value of the output voltage of the step-up device 23 is stabilized at about 537V, and the voltage value of the output voltage of the step-down device 24 is stabilized at about 24V.
According to the technical scheme, the control device 22, the boosting device 23 and the voltage reducing device 24 are integrated in the integrated box 10, and the same control device 22 is adopted to respectively control the boosting device 23 and the voltage reducing device 24 to operate, so that the integration level of a hydrogen fuel cell power supply system is improved, and the occupied area is reduced. Meanwhile, by integrating the control device 22, the voltage boosting device 23 and the voltage reducing device 24 into the integrated box 10, the peripheral lines of the hydrogen fuel cell power supply system can be saved, and the structural design difficulty of the hydrogen fuel cell power supply system can be reduced.
In a preferred embodiment, in order to control the power supply circuit of the power interface 11, a positive contactor 27 and a negative contactor 28 are further included in the integrated box 10, and the positive contactor 27 and the negative contactor 28 are further connected to the control device 22 in a communication manner. Wherein, the positive pole of the power interface 11 is electrically connected with the positive poles of the input ends of the internal power supply 21, the voltage boosting device 22 and the voltage reducing device 23 respectively through the positive pole contactor 27; the negative electrode of the power source interface 11 is electrically connected to the negative electrodes of the input terminals of the internal power source 21, the voltage step-up device 22, and the voltage step-down device 23, respectively, via a negative electrode contactor 28. Therefore, the control device 22 can control the opening and closing of the positive contactor 27 and the negative contactor 28 respectively, so as to realize the on-off of the power supply circuit of the power interface 11.
In a preferred embodiment, as shown in fig. 2 and 3, a pre-charge circuit 25 is further integrated on the circuit board 20, the pre-charge circuit 25 is communicatively connected to the control device 22, an input terminal of the pre-charge circuit 25 is electrically connected to an input terminal of the positive contactor 27, and an output terminal of the pre-charge circuit 25 is electrically connected to an output terminal of the positive contactor 27. Preferably, the pre-charging circuit 25 includes a pre-charging resistor and a pre-charging relay, an input terminal of the pre-charging resistor is electrically connected to an output terminal of the positive contactor 27, an output terminal of the pre-charging resistor is electrically connected to an output terminal of the positive contactor 27, the pre-charging relay is connected to the pre-charging resistor in series, and the pre-charging relay is further in communication connection with the control device 22, so that the control device 22 can control the on/off of the pre-charging relay conveniently, and the on/off of the pre-charging circuit 25 is. In this embodiment, when an FCU (hydrogen fuel cell stack control system module) needs to be contacted, the control device sends a precharge relay closing instruction to the precharge relay to close the precharge relay, and notifies the FCU after the precharge relay is closed, and the control device sends an anode contactor closing instruction after receiving a corresponding signal sent by the FCU to control the anode contactor to be closed, so that voltages at two ends of contacts of the anode contactor are maintained, and the contacts are prevented from being damaged due to sparks.
In a preferred embodiment, as shown in fig. 2 and 3, a bleed circuit 26 is further integrated on circuit board 20, and bleed circuit 26 is communicatively connected to control device 22, and an input of bleed circuit 26 is electrically connected to an output of positive contactor 27, and an output of bleed circuit 26 is electrically connected to an input of negative contactor 28. Preferably, the bleed circuit 26 includes a bleed resistor and a bleed relay, an input end of the bleed resistor is electrically connected to an output end of the positive contactor 27, an output end of the bleed resistor is electrically connected to an input end of the negative contactor 28, the bleed relay is connected in series with the bleed resistor, and the bleed relay is further in communication connection with the control device 22. In this embodiment, the bleeder circuit 26 is integrated on the circuit board 20, so as to prevent the damage to the proton exchange membrane caused by the continuous reaction of the residual hydrogen and oxygen in the hydrogen fuel cell system to generate electric energy and the release of the electric energy after the hydrogen fuel cell system stops outputting in the voltage conversion device, and the bleeder circuit 26 can consume the electric energy generated by the continuous reaction of the residual hydrogen and oxygen, so that the hydrogen and oxygen are consumed completely.
In a preferred embodiment, as shown in fig. 1, the integrated box 10 has a water inlet connector 15 and a water outlet connector 16, and the water inlet connector 15 and the water outlet connector 16 can be common water pipe connectors, and in this case, the water inlet connector 15 and the water outlet connector 16 are preferably located on the same side of the integrated box 10 in the circumferential direction, so as to facilitate the communication between the water inlet connector 15 and the water outlet connector 16 and the external coolant storage device, respectively. Preferably, the water inlet connector 15 and the water outlet connector 16 are both communicated with a cooling system of the automobile. The voltage conversion apparatus further includes a cold water pipe 30 located in the integrated box 10, and both ends of the cold water pipe 30 are respectively communicated with the water inlet joint 15 and the water outlet joint 16, thereby facilitating the circulation of cooling water in the cold water pipe 30. In order to increase the cooling efficiency of the cold water pipe 30, cooling fins may be further disposed on the surface of the cold water pipe 30, so as to increase the heat absorption area and increase the heat dissipation efficiency. Of course, the surface of the cold water pipe 30 may be concave-convex, that is, the surface of the cold water pipe 30 has a plurality of protrusions and depressions. The cold water pipe 30 may be arranged to flow through all the heat sinks, and the heat of the system power chip is maintained within a temperature range that can be tolerated by the device by taking away the heat of the heat sinks. In the present embodiment, the cooling liquid is circulated in the cold water pipe 30, so that the heat generated by each component in the unified box 10 is conveniently discharged along with the cooling liquid, so that the temperature inside the unified box 10 is maintained at the preset temperature.
In a preferred embodiment, in order to facilitate cooling of the interior of the integrated box 10, a first temperature sensor for detecting the temperature of the cooling liquid inside the cold water pipe 30 is further included, and the first temperature sensor is further connected to the control device 22 in a communication manner, so as to facilitate transmission of the detected data to the control device 22. The first temperature sensor is a contact sensor, and the first temperature sensor is located in the integrated box 10 and connected with the cold water pipe 30, so that the temperature of the cooling water can be conveniently detected. When the control device 22 determines that the temperature value detected by the first temperature sensor exceeds the threshold value, a corresponding signal is sent to the external cooling water delivery device, so that the external cooling water delivery device increases the flow rate of the cooling water in the cold water pipe 30 or decreases the temperature of the cooling water output by the external cooling water delivery device. Of course, the number of the first temperature sensors may also be two, one of the first temperature sensors is disposed at the water inlet of the cold water pipe 30, and the other one of the first temperature sensors is disposed at the water outlet of the cold water pipe 30, so as to detect the heat dissipation performance of the cold water pipe 30 by using the temperature difference detected by the two first temperature sensors.
In a preferred embodiment, to facilitate cooling of the interior of the cassette 10, a second temperature sensor is further included for the circuit board of the cassette 10, and the second temperature sensor is also in communication with the control device 22 to facilitate transmission of the detected data to the control device 22. The second temperature sensor is a non-contact sensor, and the location of the second temperature sensor is preferably in the area of the heat generating components in the integrated box 10, such as the vicinity of the voltage boosting device 23, the voltage reducing device 24 and the control device 22, i.e. the second temperature sensor can be integrated on the circuit board 20 or can be separately provided. When the control device 22 determines that the second temperature sensor detects that the temperature value inside the integration box 10 exceeds the threshold value, a corresponding signal is sent to the external cooling water delivery device, so that the external cooling water delivery device increases the flow rate of the cooling water in the cold water pipe 30 or decreases the temperature of the cooling water output by the external cooling water delivery device. Of course, in order to accurately detect the temperature of each heat generating component region, it is preferable that the number of the second temperature sensors is three, and the second temperature sensors are respectively arranged near the voltage boosting device 23, the voltage reducing device 24 and the control device 22, so that the temperature in each component region can be conveniently detected to avoid the phenomenon that a single component is overheated.
In a preferred embodiment, a first copper bar for transmitting voltage is arranged between the power interface 11 and the voltage boosting device 23 and the voltage reducing device 24 respectively; a second copper bar for transmitting voltage is arranged between the boosting device 23 and the high-voltage output interface 13. Because there are many high-voltage circuits in the integrated box 10 with a high integration level, if a cable is used for circuit connection, the cable is prone to rub with surrounding structures in the running process of a vehicle, so that the insulating layer of the cable is damaged, and great potential safety hazards are caused to voltage conversion equipment. In this embodiment, the assembly process of the integrated box 10 is simplified by adopting the copper bar wiring, so that the circuit wiring inside the integrated box 10 is more organized and clear, and the integrated box is attractive and convenient to maintain. Because the copper bar itself has higher intensity for the voltage circuit of the voltage boosting device 23 and the voltage reducing device 24 in the integrated box 10 is in a three-dimensional fixed type, even under the condition of large vibration, the three-dimensional fixed type structure can still ensure that safe electric gaps exist between the close copper bars, and the safety performance of the system is further improved.
In a preferred embodiment, in order to further increase the heat dissipation performance of the voltage conversion device, a plurality of heat dissipation fins are disposed on the surface of the integrated box 10, so as to increase the heat dissipation area and increase the heat dissipation performance of the integrated box 10. The heat dissipation fins may be arranged in the form of elongated plates and uniformly arranged on the upper surface of the integration box 10, and the distance between two adjacent heat dissipation fins may be arranged according to actual conditions.
In a preferred embodiment, as shown in FIG. 1, to facilitate mounting of the compact 10 to a vehicle, a plurality of mounting blocks 40 are included. The number of the mounting seats 40 is preferably four, and each is uniformly arranged around the circumference of the integration box 10. Wherein the mounting seat 40 is provided with a through hole 41 so as to facilitate the connection of a fixing screw passing through the through hole 41 with the automobile, thereby fixing the voltage conversion apparatus on the automobile. The fixing manner of the mounting seat 40 and the integrated box 10 is preferably detachable, such as by screw connection, but of course, the mounting seat 40 may also be directly fixed on the integrated box 10 by welding.
The above description is only a part of or preferred embodiments of the present invention, and neither the text nor the drawings should be construed as limiting the scope of the present invention, and all equivalent structural changes, which are made by using the contents of the present specification and the drawings, or any other related technical fields, are included in the scope of the present invention.
Claims (10)
1. The voltage conversion equipment of the hydrogen fuel cell is characterized by comprising an integration box and a circuit board positioned in the integration box, wherein the integration box is provided with a power interface, a communication interface, a high-voltage output interface and a low-voltage output interface, and the power interface can be electrically connected with the output end of the hydrogen fuel cell; an internal power supply, a control device, and a voltage boosting device and a voltage reducing device which are respectively in communication connection with the control device are integrated on the circuit board, the input end of the internal power supply is electrically connected with the power interface, and the output end of the internal power supply is electrically connected with the control device so as to supply power to the control device; the control device is also in communication connection with the communication interface; the input end of the boosting device is electrically connected with the power interface, and the output end of the boosting device is electrically connected with the high-voltage output interface; the input end of the voltage reduction device is connected with the power interface, and the output end of the voltage reduction device is electrically connected with the low-voltage output interface.
2. The voltage conversion apparatus according to claim 1, further comprising a positive contactor and a negative contactor disposed in the integrated box, and the positive contactor and the negative contactor are further communicatively connected to the control device, wherein the positive electrode of the power interface is electrically connected to the positive electrodes of the input terminals of the internal power supply, the voltage boosting device, and the voltage reducing device through the positive contactor; and the negative electrode of the power interface is respectively and electrically connected with the negative electrodes of the input ends of the internal power supply, the boosting device and the voltage reduction device through the negative electrode contactor.
3. The voltage conversion apparatus according to claim 2, wherein a pre-charging circuit is integrated on the circuit board and is in communication with the control device for protecting the positive contactor, wherein an input terminal of the pre-charging circuit is electrically connected to an input terminal of the positive contactor, and an output terminal of the pre-charging circuit is electrically connected to an output terminal of the positive contactor.
4. The voltage conversion apparatus of claim 2, wherein a bleed circuit is integrated on the circuit board and is in communication with the control device for releasing residual electrical energy from the hydrogen fuel cell system, wherein an input of the bleed circuit is electrically connected to the output of the positive contactor, and an output of the bleed circuit is electrically connected to the input of the negative contactor.
5. The voltage conversion device according to claim 1, further comprising a cold water pipe disposed in the integrated box, wherein the integrated box is correspondingly provided with a water inlet joint and a water outlet joint respectively connected to two ends of the cold water pipe.
6. The voltage conversion apparatus of claim 5, further comprising a first temperature sensor for detecting a temperature of cooling fluid within the cold water pipe, the first temperature sensor communicatively coupled to the control device.
7. The voltage conversion apparatus according to claim 1, further comprising a second temperature sensor for detecting the temperature inside the integration box, the second temperature sensor being communicatively connected to the control device.
8. The voltage conversion device according to claim 1, wherein a first copper bar for transmitting voltage is arranged between the power interface and the voltage boosting means and between the power interface and the voltage dropping means; and a second copper bar for transmitting voltage is arranged between the boosting device and the high-voltage output interface.
9. The voltage conversion device according to claim 1, wherein a surface of the integration box is provided with a plurality of heat dissipation fins.
10. The voltage conversion apparatus according to claim 1, wherein a plurality of mounting seats are further provided on the integration box, the plurality of mounting seats are arranged around the integration box, and the mounting seats have through holes for screws to pass through.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911183527.1A CN111130167A (en) | 2019-11-27 | 2019-11-27 | Voltage conversion apparatus for hydrogen fuel cell |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911183527.1A CN111130167A (en) | 2019-11-27 | 2019-11-27 | Voltage conversion apparatus for hydrogen fuel cell |
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| CN111130167A true CN111130167A (en) | 2020-05-08 |
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| CN201911183527.1A Pending CN111130167A (en) | 2019-11-27 | 2019-11-27 | Voltage conversion apparatus for hydrogen fuel cell |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106019168A (en) * | 2016-05-10 | 2016-10-12 | 清华大学 | Testing system for DC-DC converter of fuel cell vehicle |
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| CN209505505U (en) * | 2019-01-28 | 2019-10-18 | 安徽明天氢能科技股份有限公司 | A kind of fuel cell car high-voltaghe compartment |
| CN209545436U (en) * | 2019-01-09 | 2019-10-25 | 郑州宇通客车股份有限公司 | A kind of integral type fuel battery DC/DC converting means, system and vehicle |
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| CN106019168A (en) * | 2016-05-10 | 2016-10-12 | 清华大学 | Testing system for DC-DC converter of fuel cell vehicle |
| CN108859801A (en) * | 2017-04-24 | 2018-11-23 | 丰田自动车株式会社 | Fuel cell system |
| CN110098424A (en) * | 2018-01-29 | 2019-08-06 | 郑州宇通客车股份有限公司 | A kind of fuel cell high pressure integrating device, system and automobile |
| US20190288315A1 (en) * | 2018-03-14 | 2019-09-19 | Hyundai Motor Company | Method of shutting down operation of fuel cell vehicle |
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| CN209545436U (en) * | 2019-01-09 | 2019-10-25 | 郑州宇通客车股份有限公司 | A kind of integral type fuel battery DC/DC converting means, system and vehicle |
| CN209505505U (en) * | 2019-01-28 | 2019-10-18 | 安徽明天氢能科技股份有限公司 | A kind of fuel cell car high-voltaghe compartment |
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Application publication date: 20200508 |