CN112092681B - Energy input and output monitoring device for hydrogen fuel cell power system - Google Patents

Energy input and output monitoring device for hydrogen fuel cell power system Download PDF

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Publication number
CN112092681B
CN112092681B CN202011242480.4A CN202011242480A CN112092681B CN 112092681 B CN112092681 B CN 112092681B CN 202011242480 A CN202011242480 A CN 202011242480A CN 112092681 B CN112092681 B CN 112092681B
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contactor
fuel cell
connecting end
array
power system
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CN112092681A (en
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王文伟
张新永
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Shenzhen Automotive Research Institute of Beijing University of Technology
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Shenzhen Automotive Research Institute of Beijing University of Technology
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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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2210/00—Converter types
    • B60L2210/10—DC to DC converters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—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

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Fuel Cell (AREA)

Abstract

An energy input and output monitoring device for a hydrogen fuel cell power system comprises a contactor array, an array switch controller and a contactor working state detection device. The contactor array comprises a first contactor and a second contactor, the first contactor is connected between a positive input end of the DC/DC converter and a positive connecting end of the fuel cell stack, the second contactor is connected between a negative input end of the DC/DC converter and a negative connecting end of the fuel cell stack, the contactor working state detection device is used for monitoring electric signals of a first connecting end and a second connecting end of each contactor and contact point temperature of the contactors, and when the electric signals of the first connecting end and the second connecting end are larger than a preset value or the contact point temperature is larger than a preset value, an abnormal working electric signal is sent to the array switch controller to control the contactors to be disconnected. The reliability and safety of the hydrogen fuel cell power system are improved due to the monitoring of the connecting contactors of the DC/DC converter and the fuel cell stack.

Description

Energy input and output monitoring device for hydrogen fuel cell power system
Technical Field
The invention relates to the technical field of hydrogen fuel cell automobiles, in particular to an energy input and output monitoring device for a hydrogen fuel cell power system.
Background
Energy conservation and emission reduction are always the basic principles for optimizing and using an automobile energy structure, the technology of the traditional internal combustion engine is developed for over one hundred years, the internal combustion engine gradually exits from a historical stage under the limitation of the cycle efficiency and the increasing strictness of the environmental protection standard. The power chemical battery (ternary lithium battery) has the problems of energy density and service life of trade-off, and the hydrogen fuel driving technology begins to become the development trend of efficient clean energy in the future. A hydrogen fuel cell is a power generation device that directly converts chemical energy of hydrogen and oxygen into electrical energy. The basic principle is the reverse reaction of electrolyzed water, hydrogen and oxygen are supplied to the anode and cathode respectively, and after the hydrogen diffuses out through the anode and reacts with the electrolyte, electrons are released to reach the cathode through an external load. The power generation efficiency of the fuel cell can reach more than 50%, which is determined by the conversion property of the fuel cell, and the chemical energy is directly converted into the electric energy without intermediate conversion of the thermal energy and the mechanical energy (a generator). However, the fuel cell vehicle has many core components related to control, such as a main motor for driving wheels, a motor driver, a DC/DC, a high voltage distribution box, an insulation detector, and the like. However, the hydrogen fuel cell system has a complex circuit, a low circuit integration level, a large number of matching interfaces of the whole vehicle and a large structure. In addition, the controller technology of the whole vehicle is not mature, and the high-voltage power distribution unit is easy to damage due to improper control, so that the whole battery system is in failure or damage. Design and control schemes of a hydrogen fuel cell system and related components are more, part of research and development is focused on design and control of the hydrogen fuel cell, structural design and power output control of the fuel cell are related, part of research and development is focused on power distribution connection and use methods of a power bus, and the comprehensive safety detection aspect is less, for example, the aspects of high-voltage power distribution real-time insulation detection and loop detection of a finished automobile are less, so that a method capable of managing and controlling energy safety use of the finished automobile through a vehicle controller is required to be designed.
Disclosure of Invention
The invention mainly solves the technical problem of how to realize the management and control of the safe use of the energy of the whole hydrogen fuel cell automobile.
According to a first aspect, an embodiment provides an energy input output monitoring device for a hydrogen fuel cell power system, comprising a contactor array, an array switch controller and a contactor working state detection device;
the contactor array comprises at least two contactors, and each contactor comprises a first connecting end, a second connecting end and a control connecting end; the control connection end of each contactor is connected with the array switch controller and is used for receiving a connection control electrical signal sent by the array switch controller to connect the first connection end and the second connection end or receiving a disconnection control electrical signal sent by the array switch controller to disconnect the first connection end and the second connection end;
the contactor array comprises a first contactor and a second contactor;
the first connecting end of the first contactor is used for being connected with the positive connecting end of a DC/DC converter of the hydrogen fuel cell power system, and the second connecting end of the first contactor is used for being connected with the positive connecting end of a fuel cell stack of the hydrogen fuel cell power system;
the first connecting end of the second contactor is used for being connected with the negative input end of the DC/DC converter of the hydrogen fuel cell power system, and the second connecting end of the second contactor is used for being connected with the negative connecting end of the fuel cell stack of the hydrogen fuel cell power system;
the contactor working state detection device is connected with the array switch controller and is used for monitoring electric signals of a first connecting end and a second connecting end of each contactor and the contact point temperature of the contactor;
when the first connecting end and the second connecting end of the contactor are connected and the difference of electric signals connected with the first connecting end and the second connecting end of the contactor is greater than a preset value, sending a working abnormal electric signal to the array switch controller so that the array switch controller can respond to the working abnormal electric signal to send a disconnection control electric signal to the contactor;
or when the temperature of the contact point of the contactor is greater than a preset value, sending a working abnormal electrical signal to the array switch controller, so that the array switch controller responds to the working abnormal electrical signal to send a disconnection control electrical signal to the contactor.
In one embodiment, the system further comprises a real-time insulation detection circuit for monitoring electrical signals of the first connection end and the second connection end of each contactor in the contactor array, and when the contactor leaks electricity, the real-time insulation detection circuit sends an electricity leakage signal to the array switch controller, so that the array switch controller sends an opening control electrical signal to the leaked contactor.
In one embodiment, the hydrogen fuel cell power system further comprises an electrical signal sampling device connected to the array switch controller, and configured to sample electrical signals at the first connection end and the second connection end of each contactor according to a preset period to obtain electrical signal sampling data, and send the electrical signal sampling data to the array switch controller, so as to monitor and display energy input and output of the hydrogen fuel cell power system.
In one embodiment, the contactor array further comprises a third contactor and a fourth contactor;
the first connecting end of the third contactor is used for being connected with the positive output end of a DC/DC converter of the hydrogen fuel cell power system, and the second connecting end of the third contactor is used for being connected with the positive input end of a power cell charging and discharging circuit of the hydrogen fuel cell power system;
and the first connecting end of the fourth contactor is used for being connected with the negative output end of the DC/DC converter of the hydrogen fuel cell power system, and the second connecting end of the fourth contactor is used for being connected with the negative input end of the power cell charging and discharging circuit of the hydrogen fuel cell power system.
In one embodiment, the contactor array further comprises a fifth contactor and a sixth contactor;
the first connecting end of the fifth contactor is used for being connected with the positive output end of a DC/DC converter of the hydrogen fuel cell power system, and the second connecting end of the fifth contactor is used for being connected with the positive connecting end of an air compressor controller of the hydrogen fuel cell power system;
and the first connecting end of the sixth contactor is used for being connected with the negative output end of the DC/DC converter of the hydrogen fuel cell power system, and the second connecting end of the sixth contactor is used for being connected with the positive connecting end of the air compressor controller of the hydrogen fuel cell power system.
In one embodiment, the contactor array further comprises a seventh contactor and an eighth contactor;
the first connecting end of the seventh contactor is used for being connected with the positive output end of the DC/DC converter of the hydrogen fuel cell power system, and the second connecting end of the seventh contactor is used for being connected with the positive connecting end of the main motor controller of the hydrogen fuel cell power system;
and the first connecting end of the eighth contactor is used for being connected with the negative output end of the DC/DC converter of the hydrogen fuel cell power system, and the second connecting end of the eighth contactor is used for being connected with the positive connecting end of the main motor controller of the hydrogen fuel cell power system.
In one embodiment, the system further comprises a high-voltage loop full-state detection device, connected to the array switch controller, for monitoring electrical signals at a positive input end and a positive output end of a DC/DC converter of the hydrogen fuel cell power system; and when the electric signals of the positive input end and the positive output end of the DC/DC converter are not in a preset range, sending a high-voltage loop abnormal electric signal to the array switch controller, and responding to the high-voltage loop abnormal electric signal by the array switch controller to send a high-voltage loop abnormal prompt message.
In one embodiment, the contactor array is an integral modular contactor array.
In one embodiment, the connectors connected to the first and second connection terminals of each contactor of the contactor array are unified universal connectors.
In one embodiment, the contactors of the contactor array are dc contactors.
According to the energy input/output monitoring apparatus for a hydrogen fuel cell power system of the above embodiment, since the connection contactors of the DC/DC converter and the fuel cell stack of the hydrogen fuel cell power system are monitored, the reliability and safety of the hydrogen fuel cell power system are improved.
Drawings
Fig. 1 is a schematic structural connection diagram of an energy input and output monitoring apparatus according to an embodiment.
Detailed Description
The present invention will be described in further detail with reference to the following detailed description and accompanying drawings. Wherein like elements in different embodiments are numbered with like associated elements. In the following description, numerous details are set forth in order to provide a better understanding of the present application. However, those skilled in the art will readily recognize that some of the features may be omitted or replaced with other elements, materials, methods in different instances. In some instances, certain operations related to the present application have not been shown or described in detail in order to avoid obscuring the core of the present application from excessive description, and it is not necessary for those skilled in the art to describe these operations in detail, so that they may be fully understood from the description in the specification and the general knowledge in the art.
Furthermore, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments. Also, the various steps or actions in the method descriptions may be transposed or transposed in order, as will be apparent to one of ordinary skill in the art. Thus, the various sequences in the specification and drawings are for the purpose of describing certain embodiments only and are not intended to imply a required sequence unless otherwise indicated where such sequence must be followed.
The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings).
In the development process of fuel cell automobiles, part of key materials and core parts still depend on import, and the safe and healthy development of the fuel cell industry is restricted. A high-voltage power distribution unit in a power system serves as a core component, and the problems that power connection is single, switching is simple, structural design is large, layout is scattered, power distribution safety monitoring is weak and the like exist in the prior art. The integrated power system has the problems of single power flow switching, poor reliability, short service life and the like, and influences the service life of a galvanic pile and the safety and reliability of the whole vehicle. The application mainly inspects and analyzes the current situations of low integration level, low reliability and poor safety of high-voltage power distribution in the current fuel cell power system. A new high-voltage power distribution design method of a hydrogen fuel cell power system is provided in the aspects of structure, detection, control and the like, so that the reliability and the safety of the whole fuel cell automobile are improved.
In the embodiment of the application, an energy input and output monitoring device for a hydrogen fuel cell power system is disclosed, which comprises a contactor array, an array switch controller and a contactor working state detection device. The contactor array comprises a first contactor and a second contactor, the first contactor is connected between a positive input end of the DC/DC converter and a positive connecting end of the fuel cell stack, the second contactor is connected between a negative input end of the DC/DC converter and a negative connecting end of the fuel cell stack, the contactor working state detection device is used for monitoring electric signals of a first connecting end and a second connecting end of each contactor and contact point temperature of the contactors, and when the electric signals of the first connecting end and the second connecting end are larger than a preset value or the contact point temperature is larger than a preset value, an abnormal working electric signal is sent to the array switch controller to control the contactors to be disconnected. The reliability and safety of the hydrogen fuel cell power system are improved due to the monitoring of the connecting contactors of the DC/DC converter and the fuel cell stack.
The first embodiment is as follows:
referring to fig. 1, a schematic structural connection diagram of an energy input and output monitoring apparatus in an embodiment is shown, the energy input and output monitoring apparatus includes a contactor array 20, an array switch controller 10, and a contactor operating state detection apparatus 30. The contactor array 20 includes at least two contactors, each of which includes a first connection end, a second connection end and a control connection end, and the control connection end of each contactor is connected to the array switch controller 10 for receiving a connection control electrical signal sent by the array switch controller to connect the first connection end and the second connection end, or for receiving a disconnection control electrical signal sent by the array switch controller to disconnect the first connection end and the second connection end. The contactor array 20 includes a first contactor having a first connection terminal for connection with the positive input terminal of the DC/DC converter 70 of the hydrogen fuel cell power system and a second contactor having a second connection terminal for connection with the positive connection terminal of the fuel cell stack 60 of the hydrogen fuel cell power system. The first connection end of the second contactor is used for being connected with the negative input end of the DC/DC converter 70 of the hydrogen fuel cell power system, and the second connection end of the second contactor is used for being connected with the negative connection end of the fuel cell stack 60 of the hydrogen fuel cell power system. The contactor operation state detecting device 30 is connected to the array switch controller 10, and is configured to monitor electrical signals at the first connection terminal and the second connection terminal of each contactor and a contact point temperature of the contactor. When the first connection end and the second connection end of the contactor are connected and the difference of the electrical signals connected with the first connection end and the second connection end of the contactor is greater than a preset value, an abnormal working electrical signal is sent to the array switch controller 10, so that the array switch controller 10 sends a disconnection control electrical signal to the contactor in response to the abnormal working electrical signal. Or, when the temperature of the contact point of the contactor is greater than a preset value, sending a work abnormal electrical signal to the array switch controller 10, so that the array switch controller 10 sends a disconnection control electrical signal to the contactor in response to the work abnormal electrical signal, and the contactor disconnects the first connection end and the second connection end in response to the disconnection control electrical signal.
In one embodiment, the energy input/output monitoring apparatus further includes a real-time insulation detection circuit 40 for monitoring electrical signals of the first connection terminal and the second connection terminal of each contactor in the contactor array 20, and sending a leakage signal to the array switch controller 10 when the contactor leaks electricity, so that the array switch controller 10 sends an opening control electrical signal to the leaked contactor, and the leaked contactor responds to the opening control electrical signal to open the first connection terminal and the second connection terminal.
In an embodiment, the energy input and output monitoring device further includes an electrical signal sampling device 50 connected to the array switch controller 10, and configured to sample the electrical signals at the first connection end and the second connection end of each contactor according to a preset period to obtain electrical signal sampling data, and send the electrical signal sampling data to the array switch controller 10, so as to monitor and display the energy input and output of the hydrogen fuel cell power system. In one embodiment, the array switch controller 10 forwards the electrical signal sampling data to a monitoring device of the hydrogen fuel cell power system for real-time display of the operating status of each contactor in the energy input output monitoring device. Such as the open or closed state of the contactor, the values of the electrical signals at the first and second connection terminals of the contactor, and the temperature values at the contact points of the contactor.
In an embodiment, the contactor array 20 further includes a third contactor and a fourth contactor, a first connection end of the third contactor is used for being connected with a positive output end of a DC/DC converter of the hydrogen fuel cell power system, a second connection end of the third contactor is used for being connected with a positive input end of a power cell charging and discharging circuit of the hydrogen fuel cell power system, a first connection end of the fourth contactor is used for being connected with a negative output end of the DC/DC converter of the hydrogen fuel cell power system, and a second connection end of the fourth contactor is used for being connected with a negative input end of the power cell charging and discharging circuit of the hydrogen fuel cell power system. And the second connecting end of the third contactor and the second connecting end of the fourth contactor are used as power cell connecting ends of the contactor array and are used for connecting power cells of a hydrogen fuel cell power system.
In one embodiment, the contactor array further includes a fifth contactor and a sixth contactor, a first connection end of the fifth contactor is used for being connected with a positive output end of a DC/DC converter of the hydrogen fuel cell power system, and a second connection end of the fifth contactor is used for being connected with a positive connection end of an air compressor controller of the hydrogen fuel cell power system. And a first connecting end of the sixth contactor is used for being connected with a negative output end of a DC/DC converter of the hydrogen fuel cell power system, and a second connecting end of the sixth contactor is used for being connected with a positive connecting end of an air compressor controller of the hydrogen fuel cell power system. And the second connecting end of the fifth contactor and the second connecting end of the sixth contactor are used as the connecting ends of the air compressor controllers of the contactor arrays and are used for connecting the air compressor controllers of the hydrogen fuel cell power system.
In one embodiment, the contactor array further comprises a seventh contactor and an eighth contactor, the first connection terminal of the seventh contactor is used for connecting with the positive output terminal of the DC/DC converter of the hydrogen fuel cell power system, and the second connection terminal of the seventh contactor is used for connecting with the positive connection terminal of the main motor controller of the hydrogen fuel cell power system. And the first connecting end of the eighth contactor is used for being connected with the negative output end of the DC/DC converter of the hydrogen fuel cell power system, and the second connecting end of the eighth contactor is used for being connected with the positive connecting end of the main motor controller of the hydrogen fuel cell power system. And the second connecting end of the seventh contactor and the second connecting end of the eighth contactor are used as the main motor controller connecting ends of the contactor array and are used for being connected with a main motor controller of the hydrogen fuel cell power system.
In one embodiment, the contactor array further includes a ninth contactor and a tenth contactor, the first connection end of the ninth contactor is used for connecting with the positive output end of the DC/DC converter of the hydrogen fuel cell power system, and the first connection end of the tenth contactor is used for connecting with the negative output end of the DC/DC converter of the hydrogen fuel cell power system. And the second connecting end of the ninth contactor and the second connecting end of the tenth contactor are used as the output connecting ends of the DC/DC converter of the contactor array and are used for connecting a load externally to the DC/DC converter.
In one embodiment, the energy input/output monitoring apparatus further includes a high-voltage loop full-state detection device 80, connected to the array switch controller 10, for monitoring electrical signals at the positive input terminal and the positive output terminal of the DC/DC converter 70 of the hydrogen fuel cell power system, and when the electrical signals at the positive input terminal and the positive output terminal of the DC/DC converter 70 are not within a preset range, sending an abnormal electrical signal of the high-voltage loop to the array switch controller 10, and the array switch controller 10 sending an abnormal prompt message of the high-voltage loop in response to the abnormal electrical signal of the high-voltage loop. In one embodiment, the contactor array 20 is a unitary modular contactor array. In one embodiment, the connectors connected to the first and second terminals of each contact of the contact array 20 are unified universal connectors. In one embodiment, the contactors of the contactor array are dc contactors.
In the embodiment of the application, the energy input and output monitoring device comprises a contactor array, an array switch controller and a contactor working state detection device. The contactor array comprises a first contactor and a second contactor, the first contactor is connected between a positive input end of the DC/DC converter and a positive connecting end of the fuel cell stack, the second contactor is connected between a negative input end of the DC/DC converter and a negative connecting end of the fuel cell stack, the contactor working state detection device is used for monitoring electric signals of a first connecting end and a second connecting end of each contactor and contact point temperature of the contactors, and when the electric signals of the first connecting end and the second connecting end are larger than a preset value or the contact point temperature is larger than a preset value, an abnormal working electric signal is sent to the array switch controller to control the contactors to be disconnected. The reliability and safety of the hydrogen fuel cell power system are improved due to the monitoring of the connecting contactors of the DC/DC converter and the fuel cell stack. The energy input and output monitoring device in the embodiment of the application is related to the reliability and safety of the operation of the hydrogen fuel cell power system, technical research and innovation are realized in design, compared with the prior art and topology, the safe operation design method is more comprehensive in consideration, and multiple paths of configuration are designed in a contactor array, so that the implementation is easier and more flexible.
In one embodiment, the contactor array is designed by adopting a modular three-dimensional copper bar. In the contactor array, the electric connection ends of the contactors and the contactors are connected in a copper bar mode. For example, the second connection end of the ninth contactor and the second connection end of the tenth contactor are used as the output connection end of the DC/DC converter of the contactor array and used for externally connecting loads to the DC/DC converter, when a plurality of externally connected loads are needed, the first connection ends of the plurality of contactors are needed to be connected in parallel to realize electrical connection, the electrical connection ends of the contactors and the contactors are connected in a copper bar mode, and connection is realized inside the contactor array, so that the stability of the electrical connection ends between the contactors is better, and the probability of potential safety hazards caused by poor contact in production of the connection ends of the contactors is reduced. In one embodiment, the contactor array adopts a multi-path bidirectional parallel connection with the input and output ends of each power device such as a DC/DC converter, a fuel cell stack, a power cell, an air compressor controller and a main motor controller in the hydrogen fuel cell power system, and each power device is connected to the contactor array, so that the energy input and output monitoring device can conveniently and uniformly monitor and control the connection end of each power device of the hydrogen fuel cell power system, and the array switch controller can realize the flexible switching control of the contactors in the contactor array, therefore, all energy transmission and consumption among the devices in the hydrogen fuel cell power system pass through the contactor array, and the energy monitoring of the whole hydrogen fuel cell power system can be realized only by monitoring electric signals flowing through each contactor in the contactor array, so that the energy management and the energy output input control of the hydrogen fuel cell power system are more accurate, More rapid, and safer and more convenient daily maintenance and repair.
In one embodiment, the contactor array further comprises a working environment monitoring device and a working environment regulating and controlling device, the working environment monitoring device is used for monitoring the temperature, the humidity and the dust concentration of the contactor working environment of the contactor array, and the working environment monitoring device comprises a temperature monitoring device, a humidity detection device and a dust concentration monitoring device. The working environment regulating and controlling device is used for regulating the temperature, the humidity and the dust concentration to return to the range of the preset threshold value when the temperature, the humidity and the dust concentration of the working environment of the contactor exceed the preset threshold value. In one embodiment, the working environment control device comprises a dust collector, and the dust collector is provided with a moisture absorption device. In one embodiment, the working environment regulating device comprises a temperature regulating device, a humidity regulating device and a dust concentration regulating device. In one embodiment, the operating environment monitoring device is further configured to monitor a pressure value of the operating environment of the contactors of the contactor array, and when the pressure value is lower than a preset pressure threshold value, adjust a value of current flowing through each contactor in the contactor array to reduce output and/or input power of each power device of the hydrogen fuel cell power system, thereby maintaining safety and reliability of the contactor array. In one embodiment, the working environment monitoring device comprises a barometer and a comparator, wherein the barometer is used for monitoring a pressure value, and the comparator is used for comparing the monitored pressure value with a preset pressure threshold value and outputting a low-pressure monitoring signal to the hydrogen fuel cell power system when the monitored pressure value is smaller than the preset pressure threshold value, so that the hydrogen fuel cell power system responds to the low-pressure monitoring signal to reduce the output and/or input power of each power device. In this application embodiment, because all electricity connecting ends of hydrogen fuel cell power system all pass through the contactor array, therefore the job stabilization nature of contactor array directly influences hydrogen fuel cell power system's stability, based on the integrative advantage of contactor array integration, carry out operational environment's control and management to the contactor array and be favorable to hydrogen fuel cell power system safety and stability's operation.
In one embodiment, the contactor array can be switched to connect the power devices of the hydrogen fuel cell power system, for example, the power battery and the output end of the DC/DC converter can be connected in parallel to output to the load, the output end of the DC/DC converter can be simultaneously output to the power battery and the load, or the output end of the DC/DC converter can be independently output to the load. The flexible switching control is a reliable guarantee of high reliability and high safety operation of the energy input and output monitoring device, the control mode can realize the functions of high-voltage loop full-state detection, contactor working state detection, contactor adhesion state and connection point temperature detection, real-time insulation detection, voltage and current sampling of power equipment and the like through the high-voltage loop full-state detection device, the contactor working state detection device, the real-time insulation detection circuit and the electric signal sampling device, the energy input and output monitoring device can perform measures such as contactor switching, capacity control, protection and warning according to the actual requirement of power flow direction while detecting the working state in real time, finally the flexible switching control of the hydrogen fuel cell power system is realized, and the high reliability and high safety operation of high-voltage power distribution of the hydrogen fuel cell power system are ensured.
The present invention has been described in terms of specific examples, which are provided to aid understanding of the invention and are not intended to be limiting. For a person skilled in the art to which the invention pertains, several simple deductions, modifications or substitutions may be made according to the idea of the invention.

Claims (10)

1. An energy input and output monitoring device for a hydrogen fuel cell power system is characterized by comprising a contactor array, an array switch controller and a contactor working state detection device;
the contactor array comprises at least two contactors, and each contactor comprises a first connecting end, a second connecting end and a control connecting end; the control connection end of each contactor is connected with the array switch controller and is used for receiving a connection control electrical signal sent by the array switch controller to connect the first connection end and the second connection end or receiving a disconnection control electrical signal sent by the array switch controller to disconnect the first connection end and the second connection end;
the contactor array comprises a first contactor and a second contactor;
the first connecting end of the first contactor is used for being connected with the positive connecting end of a DC/DC converter of the hydrogen fuel cell power system, and the second connecting end of the first contactor is used for being connected with the positive connecting end of a fuel cell stack of the hydrogen fuel cell power system;
the first connecting end of the second contactor is used for being connected with the negative input end of the DC/DC converter of the hydrogen fuel cell power system, and the second connecting end of the second contactor is used for being connected with the negative connecting end of the fuel cell stack of the hydrogen fuel cell power system;
the contactor working state detection device is connected with the array switch controller and is used for monitoring the electric signal of the first connecting end, the electric signal of the second connecting end and the temperature of a contact point of each contactor;
when one contactor in the contactor array is conducted and the difference of electric signals connected with a first connecting end and a second connecting end of the conducted contactor is larger than a preset value, sending a working abnormal electric signal to the array switch controller so that the array switch controller can respond to the working abnormal electric signal to send a disconnection control electric signal to the conducted contactor;
or when the temperature of the contact point of one contactor in the contactor array is greater than a preset value, sending an abnormal working electrical signal to the array switch controller, so that the array switch controller responds to the abnormal working electrical signal to send an opening control electrical signal to the contactor.
2. The energy input output monitoring device according to claim 1, further comprising a real-time insulation detection circuit for monitoring electrical signals at the first connection terminal and the second connection terminal of each of the contactors in the contactor array, and sending a leakage signal to the array switch controller when the contactor is leaked for the array switch controller to send an opening control electrical signal to the leaked contactor.
3. The energy input/output monitoring device according to claim 1, further comprising an electrical signal sampling device connected to the array switch controller for sampling the electrical signal at the first connection end and the second connection end of each contactor according to a predetermined period to obtain electrical signal sampling data, and sending the electrical signal sampling data to the array switch controller for monitoring and displaying the energy input/output of the hydrogen fuel cell power system.
4. The energy input output monitoring device of claim 1, wherein the contactor array further comprises a third contactor and a fourth contactor;
the first connecting end of the third contactor is used for being connected with the positive output end of a DC/DC converter of the hydrogen fuel cell power system, and the second connecting end of the third contactor is used for being connected with the positive input end of a power cell charging and discharging circuit of the hydrogen fuel cell power system;
and the first connecting end of the fourth contactor is used for being connected with the negative output end of the DC/DC converter of the hydrogen fuel cell power system, and the second connecting end of the fourth contactor is used for being connected with the negative input end of the power cell charging and discharging circuit of the hydrogen fuel cell power system.
5. The energy input output monitoring device according to claim 4, wherein the contactor array further comprises a fifth contactor and a sixth contactor;
the first connecting end of the fifth contactor is used for being connected with the positive output end of a DC/DC converter of the hydrogen fuel cell power system, and the second connecting end of the fifth contactor is used for being connected with the positive connecting end of an air compressor controller of the hydrogen fuel cell power system;
and the first connecting end of the sixth contactor is used for being connected with the negative output end of the DC/DC converter of the hydrogen fuel cell power system, and the second connecting end of the sixth contactor is used for being connected with the positive connecting end of the air compressor controller of the hydrogen fuel cell power system.
6. The energy input output monitoring device according to claim 5, wherein the contactor array further comprises a seventh contactor and an eighth contactor;
the first connecting end of the seventh contactor is used for being connected with the positive output end of the DC/DC converter of the hydrogen fuel cell power system, and the second connecting end of the seventh contactor is used for being connected with the positive connecting end of the main motor controller of the hydrogen fuel cell power system;
and the first connecting end of the eighth contactor is used for being connected with the negative output end of the DC/DC converter of the hydrogen fuel cell power system, and the second connecting end of the eighth contactor is used for being connected with the positive connecting end of the main motor controller of the hydrogen fuel cell power system.
7. The energy input output monitoring device according to any one of claims 4 to 6, further comprising a high-voltage loop full-state detection device connected to the array switch controller for monitoring electrical signals at a positive input terminal and a positive output terminal of a DC/DC converter of the hydrogen fuel cell power system; and when the electric signals of the positive input end and the positive output end of the DC/DC converter are not in a preset range, sending a high-voltage loop abnormal electric signal to the array switch controller, and responding to the high-voltage loop abnormal electric signal by the array switch controller to send a high-voltage loop abnormal prompt message.
8. The energy input output monitoring device of claim 1, wherein the contactor array is a unitary modular contactor array.
9. The energy input output monitoring device according to claim 1, wherein the connection members connected to the first connection terminal and the second connection terminal of each contactor of the contactor array are unified universal connection members.
10. The energy input output monitoring device according to claim 1, wherein the contactors of the contactor array are direct current contactors.
CN202011242480.4A 2020-11-10 2020-11-10 Energy input and output monitoring device for hydrogen fuel cell power system Active CN112092681B (en)

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IT1230984B (en) * 1989-07-05 1991-11-08 Giuseppe Bianchi HIGH DENSITY ELECTRIC ACCUMULATOR FOR POINT LOADS.
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CN102013503B (en) * 2010-11-04 2012-09-05 北京万瑞讯通科技有限公司 Fuel cell standby power supply control system and control method thereof
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