CN112260920B - A network topology of a hydrogen fuel cell system - Google Patents
A network topology of a hydrogen fuel cell system Download PDFInfo
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- CN112260920B CN112260920B CN202011521766.6A CN202011521766A CN112260920B CN 112260920 B CN112260920 B CN 112260920B CN 202011521766 A CN202011521766 A CN 202011521766A CN 112260920 B CN112260920 B CN 112260920B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/40006—Architecture of a communication node
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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
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
- B60L3/0053—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to 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
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L2012/40208—Bus networks characterized by the use of a particular bus standard
- H04L2012/40215—Controller Area Network CAN
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L2012/40267—Bus for use in transportation systems
- H04L2012/40273—Bus for use in transportation systems the transportation system being a vehicle
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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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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Abstract
本发明公开了氢燃料电池系统网络拓扑结构，涉及氢燃料电池系统、CAN信息通讯领域和信息处理领域，该系统包括氢燃料电池控制单元FCU、电压采集模块CVM、氢气循环泵、水循环泵、升压DC、高压配电箱、空气压缩系统ACS、水加热器、整车控制器VCU和整车OBD口；其中设计CAN1为氢燃料电池系统第一内网，CAN2为氢燃料电池系统第二内网，CAN3为氢燃料电池系统对接整车网络；本发明的有益效果是：增加氢燃料电池系统网络拓扑结构的稳定性和可靠性，同时增强氢燃料电池系统网络拓扑结构的通讯响应速率。
The invention discloses a network topology structure of a hydrogen fuel cell system, and relates to a hydrogen fuel cell system, the field of CAN information communication and the field of information processing. The system includes a hydrogen fuel cell control unit FCU, a voltage acquisition module CVM, a hydrogen circulation pump, a water circulation pump, a Voltage DC, high voltage distribution box, air compression system ACS, water heater, vehicle controller VCU and vehicle OBD port; CAN1 is designed as the first internal network of the hydrogen fuel cell system, CAN2 is the second internal network of the hydrogen fuel cell system CAN3 is the hydrogen fuel cell system docking the vehicle network; the beneficial effects of the present invention are: increase the stability and reliability of the hydrogen fuel cell system network topology structure, and simultaneously enhance the communication response rate of the hydrogen fuel cell system network topology structure.
Description
Technical Field
The invention relates to a hydrogen fuel cell system, the field of CAN information communication and the field of information processing, in particular to a network topology structure of the hydrogen fuel cell system.
Background
With the increasing heat of hydrogen energy, the development and design of hydrogen fuel cell systems are more and more concerned, and in the development and design of hydrogen fuel cell systems, the design of the network architecture of the hydrogen fuel cell system becomes an important content, and the efficient and reasonable network topology architecture system of the hydrogen fuel cell system is helpful to ensure the stability and reliability of the hydrogen fuel cell system.
However, the network topology of the existing hydrogen fuel cell system does not well design a high-efficiency and stable communication network system according to the uniqueness requirement of the subsystem network in the system, and the network topology structure of the traditional hydrogen fuel cell system adopts a gateway controller to interface with the entire vehicle network, which easily causes communication delay and reduces the reliability and stability of communication. Therefore, the communication delay, reliability and stability caused by the network topology structure are not high, which is a technical problem to be solved urgently.
Disclosure of Invention
In view of the above technical problems, the present invention is directed to provide a network topology structure of a hydrogen fuel cell system, so as to solve the problems of communication delay, low reliability and low stability caused by the conventional network topology structure.
The technical scheme provided by the invention is as follows: a hydrogen fuel cell system network topology, the hydrogen fuel cell system network topology comprising: the system comprises a hydrogen fuel cell control unit FCU, a first communication network, a second communication network, a third communication network, subsystems of the hydrogen fuel cell, a voltage acquisition module CVM, a finished automobile OBD port and a finished automobile controller VCU;
the hydrogen fuel cell control unit FCU is connected with each subsystem of the hydrogen fuel cell through the first communication network and the second communication network respectively to form a first intranet of a hydrogen fuel cell system and a second intranet of the hydrogen fuel cell system;
the FCU acquires and acquires the state information of each subsystem of the hydrogen fuel cell through the first communication network and the second communication network, and sends control information to each subsystem of the hydrogen fuel cell.
The hydrogen fuel cell control unit FCU is also connected with the whole vehicle OBD port and the whole vehicle controller VCU through the third communication network respectively to form a hydrogen fuel cell system to be connected with a whole vehicle network;
and the hydrogen fuel cell control unit FCU respectively sends the state information of each subsystem to a VCU of the whole vehicle controller and an OBD port of the whole vehicle through the third communication network, and acquires control information of the whole vehicle through the third communication network, so that the internal communication of the hydrogen fuel cell system and the network communication of the hydrogen fuel cell system for butting the whole vehicle are realized.
Further, each subsystem of the hydrogen fuel cell comprises: the system comprises a voltage acquisition module CVM, a hydrogen circulating pump, a water circulating pump, a boosting DC, a high-voltage distribution box, an air compression system ACS and a water heater.
Further, a network end of the voltage acquisition module CVM is independently connected to a second communication network port of the hydrogen fuel cell control unit FCU to form a second intranet of the hydrogen fuel cell system; because the voltage acquisition module CVM needs to directly acquire the voltage information of the hydrogen fuel cell, the power response of the hydrogen fuel cell is frequent, the voltage acquisition module CVM becomes an electromagnetic interference source, and the voltage acquisition module CVM is easily interfered by an EMC (electro magnetic compatibility) of the hydrogen fuel cell, the voltage acquisition module CVM and a FCU (hydrogen fuel cell control unit) independently form a network, the influence of the CVM communication on other subsystems is easily isolated, and meanwhile, the special processing is conveniently performed on a second intranet of the hydrogen fuel cell system.
Further, a CAN shielding harness is designed in the second intranet of the hydrogen fuel cell system, and two ends of the CAN shielding harness are respectively connected to a ground wire of the voltage acquisition module CVM and a ground wire of the hydrogen fuel cell control unit FCU; namely, the shielding layer is subjected to double-end grounding treatment, so that external interference signals and interference signals brought by the hydrogen fuel cell are shielded.
Furthermore, other subsystems of the hydrogen fuel cell system are connected into a first intranet of the hydrogen fuel cell system, so that the hydrogen fuel cell control unit FCU can collect and control the subsystems conveniently, and the functions of the hydrogen fuel cell system are realized.
Further, connecting a VCU (vehicle control unit) and an OBD (on-board diagnostics) port of the vehicle with a third communication port of the FCU (hydrogen fuel cell control unit) to jointly establish a hydrogen fuel cell system to be connected with a vehicle network; the gateway forwarding link is reduced, the network communication speed of the hydrogen fuel cell system is improved, and the response time is shortened.
Furthermore, the first communication network, the second communication network and the third communication network transmit signals through two communication network lines, namely a CAN-L line and a CAN-H line.
Further, the first communication network port of the hydrogen fuel cell control unit FCU and the communication network port of the radiator fan are respectively provided with a terminal resistor.
Further, the second communication network port of the FCU and the CVM communication network port of the voltage acquisition module are respectively provided with a terminal resistor.
Further, a third communication network port of the FCU and a communication network port of the VCU of the vehicle control unit are respectively provided with a terminal resistor.
Further, the resistance value of the termination resistor is 120 ohms.
Further, the hydrogen fuel cell unit controller FCU sends the related information of the first intranet and the second intranet of the hydrogen fuel cell system to the hydrogen fuel cell system butt joint whole vehicle network, and information interaction of the hydrogen fuel cell system intranet network information sent to the hydrogen fuel cell system butt joint whole vehicle network is achieved.
Further, the hydrogen fuel cell controller FCU directly obtains control information of the vehicle controller VCU by interfacing with the vehicle network through the hydrogen fuel cell system.
The invention has the beneficial effects that: the invention designs a more efficient and reasonable network topology structure of the hydrogen fuel cell system, solves and improves the problem that a subsystem network is easy to collapse due to external interference, and is beneficial to improving the stability and reliability of the hydrogen fuel cell system.
Drawings
FIG. 1 is a schematic diagram of the network topology of a hydrogen fuel cell system of the present invention;
fig. 2 is a high-low voltage architecture diagram of a hydrogen fuel cell system of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
The network topology architecture system of the hydrogen fuel cell system is more efficient and reasonable, the network communication rate of the hydrogen fuel cell system is improved, the response time is shortened, the problem that a subsystem network is easy to collapse due to external interference is solved and improved, and the stability and the reliability of the hydrogen fuel cell system are improved. The technical scheme adopted by the specific embodiment of the invention is as follows:
referring to fig. 1, fig. 1 is a schematic diagram of a network topology structure of a hydrogen fuel cell system according to the present invention, and the present invention provides a network architecture topology design scheme: a network topology for a hydrogen fuel cell system.
The invention discloses a network topology structure of a hydrogen fuel cell system, which comprises: the system comprises a hydrogen fuel cell control unit FCU 40, a first communication network, a second communication network, a third communication network, subsystems of a hydrogen fuel cell, a vehicle OBD port 20 and a vehicle control unit VCU 30;
the hydrogen fuel cell control unit FCU 40 is connected to each subsystem of the hydrogen fuel cell through a first communication network and a second communication network, respectively, to form a first intranet 70 of the hydrogen fuel cell system and a second intranet 80 of the hydrogen fuel cell system;
the FCU 40 acquires and acquires the state information of each subsystem of the hydrogen fuel cell through a first communication network and a second communication network, and sends control information to each subsystem of the hydrogen fuel cell.
The hydrogen fuel cell control unit FCU 40 is also connected with the vehicle OBD port 20 and the vehicle controller VCU 30 through a third communication network respectively to form a hydrogen fuel cell system which is connected with a vehicle network;
the hydrogen fuel cell control unit FCU 40 sends the relevant information in the first intranet 70 and the second intranet 80 to the vehicle controller VCU 30 and the vehicle OBD port 20 through the third communication network, respectively, and obtains the vehicle control information through the third communication network, so as to realize the internal communication of the hydrogen fuel cell system and the network communication of the hydrogen fuel cell system to the vehicle.
In fig. 1, the network topology of the hydrogen fuel cell system is mainly divided into three networks, i.e., a first intranet 70 of the hydrogen fuel cell system, a second intranet 80 of the hydrogen fuel cell system, and the hydrogen fuel cell system is connected to the entire vehicle network 60.
Wherein, the hydrogen fuel cell system first intranet 70 is led out of the CAN communication network by the hydrogen fuel cell control unit FCU 40 through a first set of CAN-L lines and CAN-H lines (first communication network); the hydrogen fuel cell system second intranet 80 is a hydrogen fuel cell control unit FCU 40 led out of the CAN communication network through a second set of CAN-L lines and CAN-H lines (second communication network); the hydrogen fuel cell system is connected with the whole vehicle network 60, and the hydrogen fuel cell control unit FCU 40 is led out of the CAN communication network through a third set of CAN-L lines and CAN-H lines (a third communication network).
CAN-L communication pins and CAN-H communication pins are arranged in the hydrogen circulating pump 41, the water circulating pump 42, the boosting DC 43, the high-voltage distribution box 44, the air compression system ACS 45 and the water heater 46, and the CAN-L communication pins are electrically connected with a CAN-L of a first communication network of the hydrogen fuel cell control unit FCU 40 through CAN-L lines.
The voltage acquisition module CVM 10 is provided with a CAN-L communication pin and a CAN-H communication pin, and the CAN-L communication pin is electrically connected with a CAN-L of the second communication network of the hydrogen fuel cell control unit FCU 40 through a CAN-L line.
CAN-L communication pins and CAN-H communication pins are arranged in the VCU 30 of the finished vehicle controller and the OBD port 20 of the finished vehicle, and the CAN-L communication pins are electrically connected with the third communication network CAN-L of the hydrogen fuel cell control unit FCU 40 through CAN-L lines.
Two terminal resistors are designed in the first intranet 70 of the hydrogen fuel cell system, and are respectively designed on the first communication network of the hydrogen fuel cell control unit FCU 40 and the water heater 46.
Two terminal resistors are designed in the second intranet 80 of the hydrogen fuel cell system, and are respectively designed on the second communication network of the hydrogen fuel cell control unit FCU 40 and the voltage acquisition module CVM 10.
Because the voltage acquisition module CVM 10 needs to directly acquire the voltage information of the hydrogen fuel cell, and the power response of the hydrogen fuel cell is frequent, so that the voltage acquisition module CVM 10 becomes an electromagnetic interference source, and the voltage acquisition module CVM 10 is easily interfered by an EMC (electro magnetic compatibility) of the hydrogen fuel cell, the voltage acquisition module CVM 10 and the hydrogen fuel cell control unit FCU 40 independently form a network, the influence of the communication of the voltage acquisition module CVM 10 on other subsystems is easily isolated, and meanwhile, the special processing is conveniently performed on the second intranet 80 of the hydrogen fuel cell system. The special treatment comprises the following steps: a shielding layer (shielding harness) is added outside the second inner mesh 80 of the hydrogen fuel cell system, and double-end grounding processing is performed on the shielding layer of the second inner mesh 80 of the hydrogen fuel cell system, so that external interference signals and interference signals brought by the hydrogen fuel cell are shielded, and electrostatic shielding of the second inner mesh 80 is realized.
Two terminal resistors are required to be designed in the network 60 for connecting the hydrogen fuel cell system to the vehicle, wherein one terminal resistor is designed on the communication network of the VCU 30 of the vehicle controller, and the second terminal resistor is designed on the third communication network of the FCU 40 of the hydrogen fuel cell control unit.
For the hydrogen fuel cell system to be connected with the whole vehicle network 60, the traditional gateway controller is cancelled, because the gateway forwards information, the communication speed can be slowed down to a certain extent, and the response time is prolonged; the hydrogen fuel cell system is used as a power response and safety device, and needs to respond power and send self state information in time so that an external controller can make relevant control and response. Therefore, the gateway forwarding link is reduced, the network communication speed of the hydrogen fuel cell system is improved, and the response time is shortened.
The reason for increasing the network termination resistance in each of the three networks is: eliminating signal reflections in communication cables, there are two reasons for signal reflections during communication: impedance discontinuity and impedance mismatch. Impedance discontinuities where a signal suddenly encounters little or no cable impedance at the end of a transmission line causes a reflection of the signal. The principle of this signal reflection is similar to the reflection of light from one medium into another.
In order to eliminate this reflection, a termination resistor of the same magnitude as the characteristic impedance of the cable must be connected across the end of the cable to make the impedance of the cable continuous. Since the transmission of signals over the cable is bidirectional, a termination resistor of the same size can be connected across the other end of the communication cable.
Another cause of signal reflection is impedance mismatch between the data transceiver and the transmission cable. The reflection caused by the reason is mainly reflected in that the whole network data is disordered when the communication line is in an idle mode.
In order to improve the topological capability of a network node, two ends of a CAN bus need to be connected with 120 omega terminal resistors for suppressing reflection, the terminal resistors play a very important role in matching bus impedance, and if the resistors are neglected, the anti-interference performance and reliability of digital communication are greatly reduced, and even communication cannot be performed.
Referring to fig. 2, fig. 2 is a high-low voltage architecture diagram of the hydrogen fuel cell system of the present invention, and the whole hydrogen fuel cell system operates as follows:
the hydrogen circulation pump 41, the water circulation pump 42, the boost DC 43, the high voltage distribution box 44, the air compression system ACS 45, and the water heater 46 respectively provide their own information, including: hydrogen circulation pump state information 6, water circulation pump 1, boost DC state information 4, high voltage distribution box state information 7, air compression system state information 8 and water heater state information 5 are sent to a first intranet 70 of the hydrogen fuel cell system, and simultaneously, the hydrogen fuel cell controller FCU 40 acquires these subsystem state information and sends the internal control information of the hydrogen fuel system to each subsystem through the first intranet 70 of the hydrogen fuel cell system, and each subsystem component executes corresponding operation according to the control information.
The voltage acquisition module CVM sends the hydrogen fuel cell state information 3 to the second intranet 80 of the hydrogen fuel cell system, and the hydrogen fuel cell controller FCU acquires these information from the second intranet 80 of the hydrogen fuel cell system.
The hydrogen fuel cell controller FCU transmits hydrogen fuel cell system state information 9 to the vehicle OBD port and the vehicle controller VCU through hydrogen fuel cell system docking vehicle network 60 with information obtained from the first intranet 70 of the hydrogen fuel cell system and the second intranet 80 of the hydrogen fuel cell system, and simultaneously the hydrogen fuel cell controller FCU obtains vehicle OBD vehicle network information 11 and control information 10 of the vehicle controller VCU from hydrogen fuel cell system docking vehicle network 60.
Finally, stable and reliable communication between the internal network and the external network of the hydrogen fuel cell system is realized, and the hydrogen fuel cell system can be directly implanted into the communication network of the whole hydrogen fuel automobile.
The invention has the beneficial effects that: the invention designs a more efficient and reasonable network topology structure of the hydrogen fuel cell system, solves and improves the problem that a subsystem network is easy to collapse due to external interference, and is beneficial to improving the stability and reliability of the hydrogen fuel cell system.
In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.
The features of the embodiments and embodiments described herein above may be combined with each other without conflict.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. A hydrogen fuel cell system network topology, comprising: the system comprises a hydrogen fuel cell control unit FCU, a first communication network, a second communication network, a third communication network, subsystems of a hydrogen fuel cell, a finished automobile OBD port and a finished automobile controller VCU;
the hydrogen fuel cell control unit FCU is connected with each subsystem of the hydrogen fuel cell through the first communication network and the second communication network respectively to form a first intranet of a hydrogen fuel cell system and a second intranet of the hydrogen fuel cell system;
each subsystem of the hydrogen fuel cell comprises: the system comprises a voltage acquisition module CVM, a hydrogen circulating pump, a water circulating pump, a boosting DC, a high-voltage distribution box, an air compression system ACS and a water heater;
the hydrogen fuel cell control unit FCU is respectively connected with the hydrogen circulating pump, the water circulating pump, the boosting DC, the high-voltage distribution box, the air compression system ACS and the water heater through the first communication network to form a first intranet of the hydrogen fuel cell system;
the hydrogen fuel cell control unit FCU is connected with the voltage acquisition module CVM through the second communication network to form a second intranet of the hydrogen fuel cell system;
the FCU acquires and acquires state information of each subsystem of the hydrogen fuel cell through the first communication network and the second communication network, and sends control information to each subsystem of the hydrogen fuel cell;
the hydrogen fuel cell control unit FCU is also connected with the whole vehicle OBD port and the whole vehicle controller VCU through the third communication network respectively to form a hydrogen fuel cell system to be connected with a whole vehicle network;
the hydrogen fuel cell control unit FCU sends the state information of each subsystem of the hydrogen fuel cell to a VCU of the whole vehicle controller and an OBD port of the whole vehicle respectively through the third communication network, and obtains control information of the whole vehicle through the third communication network, so that internal communication of a hydrogen fuel cell system and network communication of the hydrogen fuel cell system for butting the whole vehicle are realized.
2. The network topology of hydrogen fuel cell system according to claim 1, wherein a CAN shielding harness is designed in the second intranet of hydrogen fuel cell system, and two ends of the CAN shielding harness are respectively connected to the ground line of the voltage acquisition module CVM and the ground line of the hydrogen fuel cell control unit FCU.
3. The network topology of claim 1, wherein the first communication network, the second communication network, and the third communication network are all configured to transmit signals via two communication network lines.
4. The network topology of a hydrogen fuel cell system according to claim 1, wherein said first communication network port and said communication network port of said hydrogen fuel cell control unit FCU are respectively provided with a terminal resistor.
5. The network topology of a hydrogen fuel cell system according to claim 1, wherein said second communication network port of said hydrogen fuel cell control unit FCU and said CVM communication network port of said voltage acquisition module are respectively provided with a terminal resistor.
6. The network topology of claim 1, wherein said hydrogen fuel cell control unit FCU third communication network port and said vehicle control unit VCU communication network port are configured with termination resistors, respectively.
7. A hydrogen fuel cell system network topology according to any of the claims 4-6, characterized in that the termination resistor has a value of 120 ohms.
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