CN118263479A - Fuel cell system and vehicle - Google Patents

Abstract

The invention discloses a fuel cell system and a vehicle, the system includes: a fuel cell controller, the rated voltage of the fuel cell controller being in a preset voltage range; the input end of the voltage conversion circuit is connected with a storage battery of the vehicle, the output end of the voltage conversion circuit is connected with the fuel cell controller, and the output voltage of the voltage conversion circuit is in a preset voltage range; the wake-up circuit is provided with a first input end which is used for being connected with a whole vehicle controller of a vehicle, a second input end of the wake-up circuit is connected with an output end of the voltage conversion circuit, and an output end of the wake-up circuit is connected with the fuel cell controller; the input end of the first power distribution circuit is connected with the output end of the storage battery; and the input end of the second power distribution circuit is connected with the output end of the voltage conversion circuit. The invention solves the technical problem of low universality of the fuel cell system.

Description

Fuel cell system and vehicle

Technical Field

The invention belongs to the technical field of batteries, and particularly relates to a fuel cell system and a vehicle.

Background

Whether to the passenger car or the commercial car, the design of fuel cell system can be carried out according to the battery, however the battery of passenger car is mostly 12v, and the battery of commercial car is mostly 24v, and then leads to the difference that each electrical equipment exists circuit structure and driving mode among the fuel cell system of different motorcycle types, and the fuel cell system of different motorcycle types can't be changed wantonly, need design different fuel cell system to different motorcycle types, this can increase the cost of enterprises, reduces enterprise competitiveness. Therefore, low versatility of the fuel cell system is a technical problem to be solved.

Disclosure of Invention

The embodiment of the invention provides a fuel cell system and a vehicle, which solve the technical problem of low universality of the fuel cell system.

In a first aspect, an embodiment of the present invention provides a fuel cell system, applied to a vehicle, including: a fuel cell controller, the rated voltage of the fuel cell controller being in a preset voltage range; the input end of the voltage conversion circuit is connected with the storage battery of the vehicle, the output end of the voltage conversion circuit is connected with the fuel cell controller, and the output voltage of the voltage conversion circuit is in the preset voltage range; the wake-up circuit is provided with a first input end which is used for being connected with a whole vehicle controller of the vehicle, a second input end of the wake-up circuit is connected with an output end of the voltage conversion circuit, and an output end of the wake-up circuit is connected with the fuel cell controller; the input end of the first power distribution circuit is connected with the output end of the storage battery; and the input end of the second power distribution circuit is connected with the output end of the voltage conversion circuit.

With reference to the first aspect of the present invention, in some embodiments, the voltage conversion circuit includes: the first end of the first fuse is connected with the positive electrode of the storage battery; the first input end of the DC/DC converter is connected with the second end of the first fuse, the second input end of the DC/DC converter is connected with the negative electrode of the storage battery, the first output end of the DC/DC converter is respectively connected with the input end of the second power distribution circuit, the second input end of the wake-up circuit and the normal electric end of the fuel cell controller, and the second output end of the DC/DC converter is respectively connected with the grounding end and the grounding wire of the fuel cell controller.

With reference to the first aspect of the present invention, in some embodiments, the voltage conversion circuit further includes: the first output end of the DC/DC converter is respectively connected with the input end of the second power distribution circuit, the second input end of the wake-up circuit and the normal electric end of the fuel cell controller through the filter, and the second output end of the DC/DC converter is respectively connected with the grounding end and the grounding wire of the fuel cell controller through the filter.

With reference to the first aspect of the present invention, in some embodiments, the wake-up circuit includes: the positive electrode of the anti-reflection diode is connected with the output end of the whole vehicle controller; the first end of the first resistor is connected with the negative electrode of the anti-reflection diode; the first end of the second resistor is connected with the second end of the first resistor; the grid electrode of the MOS tube is respectively connected with the first end of the second resistor and the second end of the first resistor, and the source electrode of the MOS tube is respectively connected with the second end of the second resistor and the ground wire; the first end of the third resistor is connected with the first end of the first resistor and the negative electrode of the anti-reflection diode respectively; the first end of the fourth resistor is connected with the first output end of the DC/DC converter; the control end of the first relay is connected with the drain electrode of the MOS tube, the first contact end of the first relay is connected with the positive electrode of the storage battery, and the second contact end of the first relay is respectively connected with the first end of the first fuse and the input end of the first power distribution circuit; the anode of the isolation optocoupler is connected with the second end of the third resistor, the cathode of the isolation optocoupler is respectively connected with the source electrode of the MOS tube, the second end of the second resistor and the grounding wire, the collector of the isolation optocoupler is connected with the second end of the fourth resistor, and the emitter of the isolation optocoupler is connected with the wake-up signal end of the fuel cell controller.

With reference to the first aspect of the present invention, in some embodiments, the wake-up circuit further includes: the positive electrode of the voltage stabilizing diode is respectively connected with the second end of the second resistor, the grounding wire and the source electrode of the MOS tube, and the negative electrode of the voltage stabilizing diode is respectively connected with the second end of the first resistor, the first end of the second resistor and the gate electrode of the MOS tube.

With reference to the first aspect of the present invention, in some embodiments, the first power distribution circuit includes: the input end of the first direct power supply and distribution sub-circuit is connected with the second contact end of the first relay, and the first direct power supply and distribution sub-circuit is provided with a fuse; the fuel cell controller comprises a first non-direct power supply and distribution sub-circuit, wherein the input end of the first non-direct power supply and distribution sub-circuit is connected with the second contact end of the first relay, the first non-direct power supply and distribution sub-circuit is provided with a fuse and a first group of relays, and each relay in the first group of relays is electrically connected with the fuel cell controller.

With reference to the first aspect of the present invention, in some embodiments, the second power distribution circuit includes: the input end of the second direct-current power supply and distribution sub-circuit is connected with the first output end of the DC/DC converter, and the second direct-current power supply and distribution sub-circuit is provided with a fuse; and the input end of the second non-direct power supply and distribution sub-circuit is connected with the first output end of the DC/DC converter, the second non-direct power supply and distribution sub-circuit is provided with a fuse and a second group of relays, and each relay in the second group of relays is electrically connected with the fuel cell controller.

With reference to the first aspect of the present invention, in some embodiments, the whole vehicle controller sends a wake-up signal for the fuel cell controller, so that the wake-up circuit wakes up the fuel cell controller, the voltage conversion circuit provides power for the fuel cell controller, and the first power distribution circuit and the second power distribution circuit supply power for electrical devices of the fuel cell system.

With reference to the first aspect of the present invention, in some embodiments, the method further includes: the first contact end of the second relay is connected with the positive electrode of the storage battery, the second contact end of the second relay is respectively connected with the input end of the first power distribution circuit and the input end of the voltage conversion circuit, and the control end of the second relay is connected with the fuel cell controller; after the fuel cell controller wakes up, the fuel cell controller controls the first contact end and the second contact end of the second relay to be closed.

In a second aspect, an embodiment of the present invention provides a vehicle including the fuel cell system of any one of the first aspects.

The one or more technical solutions provided by the embodiments of the present invention at least achieve the following technical effects or advantages:

The fuel cell system provided by the embodiment of the invention is applied to a vehicle, and comprises: a fuel cell controller, the rated voltage of the fuel cell controller being in a preset voltage range; the input end of the voltage conversion circuit is connected with a storage battery of the vehicle, the output end of the voltage conversion circuit is connected with the fuel cell controller, and the output voltage of the voltage conversion circuit is in a preset voltage range; the wake-up circuit is provided with a first input end which is used for being connected with a whole vehicle controller of a vehicle, a second input end of the wake-up circuit is connected with an output end of the voltage conversion circuit, and an output end of the wake-up circuit is connected with the fuel cell controller; the input end of the first power distribution circuit is connected with the output end of the storage battery; and the input end of the second power distribution circuit is connected with the output end of the voltage conversion circuit. For a passenger car, the storage battery is mostly 12v, the first power distribution circuit can supply power for high-power electrical equipment with rated voltage of 12v or low-power electrical equipment with rated voltage of 12v in the fuel cell system, the second power distribution circuit can supply power for low-power electrical equipment with rated voltage of 12v in the fuel cell system, and the power supply converted by the voltage conversion circuit can supply power for the fuel cell controller; for commercial vehicles, the storage battery is mostly 24v, the first power distribution circuit can supply power for high-power electrical equipment with rated voltage of 24v or low-power electrical equipment with rated voltage of 24v in the fuel cell system, the second power distribution circuit can supply power for low-power electrical equipment with rated voltage of 12v in the fuel cell system, and the power supply converted by the voltage conversion circuit can supply power for the fuel cell controller. Therefore, for different vehicle types, the storage battery can supply power for the fuel cell system, so that the universality of the fuel cell system is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a fuel cell system in accordance with an embodiment of the present invention;

Fig. 2 is a schematic connection diagram of a fuel cell system, a battery, and a vehicle controller according to an embodiment of the present invention.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The description as it relates to "first", "second", etc. in the present invention is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.

Fig. 1 is a schematic diagram of a fuel cell system in an embodiment of the invention. The fuel cell system may be applied to a vehicle, and referring to fig. 1, a fuel cell system according to an embodiment of the present invention includes: a fuel cell controller 10, the rated voltage of the fuel cell controller 10 being in a preset voltage range; the fuel cell system comprises a voltage conversion circuit 20, wherein the input end of the voltage conversion circuit 20 is connected with a storage battery 60 of the vehicle, the output end of the voltage conversion circuit 20 is connected with a fuel cell controller 10, and the output voltage of the voltage conversion circuit 20 is in a preset voltage range; the wake-up circuit 30, the wake-up circuit 30 has the first input end used for connecting with the whole vehicle controller 70 of the vehicle, the second input end of the wake-up circuit 30 is connected with output end of the voltage converting circuit 20, the output end of the wake-up circuit 30 is connected with the fuel cell controller 10; the first power distribution circuit 40, the input end of the first power distribution circuit 40 is connected with the output end of the storage battery 60; the input end of the second power distribution circuit 50 is connected to the output end of the voltage conversion circuit 20.

As for the connection relationship of the fuel cell controller 10, the voltage conversion circuit 20, the wake-up circuit 30, the first power distribution circuit 40, the second power distribution circuit 50, the battery 60, and the vehicle controller 70, reference may be made to fig. 2.

It should be noted that, the preset voltage range may include 0 to 72v, specifically, may be 12v, that is, the rated voltage of the fuel cell controller 10 is 12v, at this time, the fuel cell controller 10 and related elements thereof may be designed as an electrical platform with 12v, and the output voltage of the voltage conversion circuit 20 is 12v no matter the storage battery 60 is 12v or 24v, which ensures that a stable power supply is provided for the fuel cell controller 10. The fuel cell system may be a hydrogen fuel cell system.

In some embodiments, referring to fig. 1, the voltage conversion circuit 20 may include: the first fuse 210, the first end of the first fuse 210 is connected with the positive electrode of the battery 60; the first input terminal of the DC/DC converter 220 is connected to the second terminal of the first fuse 210, the second input terminal of the DC/DC converter 220 is connected to the negative electrode of the battery 60, the first output terminal of the DC/DC converter 220 is connected to the input terminal of the second power distribution circuit 50, the second input terminal of the wake-up circuit 30, and the normal electric terminal of the fuel cell controller 10, respectively, and the second output terminal of the DC/DC converter 220 is connected to the ground terminal and the ground line of the fuel cell controller 10, respectively.

It should be noted that if the circuit current is too large, damage to the DC/DC converter 220 or other components may be caused. Therefore, by providing the first fuse 210, damage to the DC/DC converter 220 due to excessive circuit current is prevented, and circuit safety is improved. Likewise, the output of the voltage conversion circuit 20 may be connected to the fuel cell controller 10 through a second fuse 240.

In some embodiments, referring to fig. 1, the voltage conversion circuit 20 may further include: the first output terminal of the DC/DC converter 220 is connected to the input terminal of the second power distribution circuit 50, the second input terminal of the wake-up circuit 30, and the constant electrical terminal of the fuel cell controller 10 through the filter 230, and the second output terminal of the DC/DC converter 220 is connected to the ground terminal and the ground line of the fuel cell controller 10 through the filter 230, respectively.

It should be noted that, the power supply converted by the DC/DC converter 220 filters the electrical signal through the filter 230, so that the electromagnetic interference problem of the fuel cell controller 10 can be effectively reduced, and the circuit stability is improved.

In some embodiments, referring to fig. 1, wake-up circuit 30 may include: the positive electrode of the anti-reflection diode 310 is connected with the output end of the whole vehicle controller 70; the first end of the first resistor 320 is connected with the cathode of the anti-reflection diode 310; the first end of the second resistor 330 is connected with the second end of the first resistor 320; the MOS tube 340, the grid electrode of the MOS tube 340 is respectively connected with the first end of the second resistor 330 and the second end of the first resistor 320, and the source electrode of the MOS tube 340 is respectively connected with the second end of the second resistor 330 and the ground wire; the first end of the third resistor 350 is connected with the first end of the first resistor 320 and the negative electrode of the anti-reflection diode 310 respectively; a fourth resistor 360, a first end of the fourth resistor 360 being connected to a first output end of the DC/DC converter 220; the control end of the first relay 370 is connected with the drain electrode of the MOS tube 340, the first contact end of the first relay 370 is connected with the anode of the storage battery 60, and the second contact end of the first relay 370 is respectively connected with the first end of the first fuse 210 and the input end of the first power distribution circuit 40; the anode of the isolation optocoupler 380 is connected with the second end of the third resistor 350, the cathode of the isolation optocoupler 380 is respectively connected with the source electrode of the MOS tube 340, the second end of the second resistor 330 and the ground wire, the collector of the isolation optocoupler 380 is connected with the second end of the fourth resistor 360, and the emitter of the isolation optocoupler 380 is connected with the wake-up signal end of the fuel cell controller 10.

Referring to fig. 1, the first relay 370 includes a first coil K1 and a first switch A1, a control terminal of the first relay 370 is located at the first coil K1, and a first contact terminal of the first relay 370 and a second contact terminal of the first relay 370 are located at the first switch A1.

It should be noted that, when the whole vehicle controller 70 sends out an electrical signal with the function of waking up the fuel cell controller 10, the electrical signal sequentially flows through the anti-reflection diode 310, the first resistor 320 and the second resistor 330, the MOS tube 340 is turned on due to the voltage division of the second resistor 330, the electrical signal of the drain electrode of the MOS tube 340 acts on the control end of the first relay 370, the first contact end and the second contact end of the first relay 370 are closed, and then the positive electrode of the storage battery 60 is connected with the first end of the first fuse 210 and the input end of the first power distribution circuit 40, respectively. Therefore, the storage battery 60 communicates with the voltage conversion circuit 20, and the power converted by the voltage conversion circuit 20 can be supplied to the fuel cell controller 10, while the storage battery 60 communicates with the first power distribution circuit 40, and the first power distribution circuit 40 can supply power to high-power electric devices or low-power electric devices in the fuel cell system. In addition, the electrical signal of the vehicle controller 70 also flows through the anode and the cathode of the isolation optocoupler 380 through the anti-reflection diode 310 and the third resistor 350, and meanwhile, the electrical signal of the power source converted by the voltage conversion circuit 20 flows to the collector of the isolation optocoupler 380 through the fourth resistor 360, so that the isolation optocoupler 380 works at this time, and the electrical signal of the power source converted by the voltage conversion circuit 20 sequentially flows to the wake-up signal end of the fuel cell controller 10 through the fourth resistor 360, the collector of the isolation optocoupler 380, and the emitter of the isolation optocoupler 380.

It should be noted that if the circuit current is too large, damage to the isolation optocoupler 380 may be caused, and at this time, by setting the third resistor 350 and the fourth resistor 360, the circuit current is prevented from being too large, that is, damage to the isolation optocoupler 380 is prevented, and the circuit safety is improved. In addition, the anti-reflection diode 310 ensures the correct flow direction of the circuit current, so that the damage of the whole vehicle controller 70 caused by excessive current is avoided, and the circuit safety is improved.

It should be noted that, the rated current of the anti-reflection diode 310 may be 2A, the resistance of the first resistor 320 may be 1k, the resistance of the second resistor 330 may be 10k, the resistance of the third resistor 350 may be 3k, the resistance of the fourth resistor 360 may be 2k, the rated current of the first relay 370 may be 10a, and the rated current of the mos transistor 340 may be 6A. The first relay 370 may be a solid relay of a wide voltage range or a relay designed to be pluggable, and may be replaced with a relay of a corresponding voltage according to the voltage of the battery 60.

In some embodiments, wake-up circuit 30 may further comprise: the positive electrode of the zener diode 390 is connected with the second end of the second resistor 330, the ground wire and the source electrode of the MOS tube 340 respectively, and the negative electrode of the zener diode 390 is connected with the second end of the first resistor 320, the first end of the second resistor 330 and the gate electrode of the MOS tube 340 respectively.

It should be noted that, the zener diode 390 may be a 15V zener diode 390, that is, it may be ensured that the voltage after the voltage division of the MOS transistor 340 is clamped to be 15V, so as to prevent the MOS transistor 340 from being broken down, and improve the circuit security.

In some embodiments, the first power distribution circuit 40 may include: the first direct current power supply and distribution sub-circuit 410, the input end of the first direct current power supply and distribution sub-circuit 410 is connected with the second contact end of the first relay 370, and the first direct current power supply and distribution sub-circuit 410 is provided with a fuse; the first non-direct power supply and distribution sub-circuit 420, the input terminal of the first non-direct power supply and distribution sub-circuit 420 is connected with the second contact terminal of the first relay 370, the first non-direct power supply and distribution sub-circuit 420 is provided with a fuse and a first set of relays, and each relay in the first set of relays is electrically connected with the fuel cell controller 10.

It should be noted that the first dc power supply and distribution sub-circuit 410 may supply power to an electrical device that allows the battery 60 to directly supply power, for example, an isolated low-voltage component or a high-voltage component of the CAN communication type. The first non-direct power distribution sub-circuit 420 may supply power to electrical devices that do not allow direct power to the battery 60, such as low voltage PTC or switching valve type elements, and the like, low voltage high power elements. Therefore, by providing the first direct power supply and distribution sub-circuit 410 and the first non-direct power supply and distribution sub-circuit 420, compatibility of circuit power supply is improved.

Referring to fig. 1, the first dc power distribution sub-circuit 410 may include 3 branch power distribution circuits, each of which is configured with one fuse, namely, a third fuse 4110, a fourth fuse 4120 and a fifth fuse 4130. The first non-direct current power distribution sub-circuit 420 may include 3 branch power distribution circuits, each of which is configured with a fuse, namely, a sixth fuse 4210, a seventh fuse 4220 and an eighth fuse 4230, and the first set of relays may include 3 branch power distribution circuits in which a third relay 4240, a fourth relay 4250 and a fifth relay 4260,3 are respectively disposed in the first non-direct current power distribution sub-circuit 420. In addition, since each relay in the first group of relays is electrically connected to the fuel cell controller 10, it is realized that the fuel cell controller 10 controls the on-off of the first non-direct power supply and distribution sub-circuit 420. The relay arrangement is shown in fig. 1, wherein the third relay 4240 includes a third coil K3 and a third switch A3, the fourth relay 4250 includes a fourth coil K4 and a fourth switch A4, the fifth relay 4260 includes a fifth coil K5 and a fifth switch A5, and the third coil K3, the fourth coil K4, and the fifth coil K5 are all connected to the low side driving port of the fuel cell controller 10.

In some embodiments, the second power distribution circuit 50 may include: the second direct-current power supply and distribution sub-circuit 510, an input end of the second direct-current power supply and distribution sub-circuit 510 is connected with a first output end of the DC/DC converter 220, and the second direct-current power supply and distribution sub-circuit 510 is provided with a fuse; the second non-direct power supply and distribution sub-circuit 520, an input terminal of the second non-direct power supply and distribution sub-circuit 520 is connected to the first output terminal of the DC/DC converter 220, the second non-direct power supply and distribution sub-circuit 520 is provided with a fuse and a second set of relays, and each relay in the second set of relays is electrically connected to the fuel cell controller 10.

It should be noted that the second direct-current power supply and distribution sub-circuit 510 may supply power to an electrical device that allows direct power supply of a converted power source, for example, an isolated low-voltage component or a high-voltage component of the CAN communication type. The second non-direct power distribution sub-circuit 520 may power electrical devices that do not allow direct power to be converted, such as, for example, on-off control type elements. Therefore, by providing the second direct power supply and distribution sub-circuit 510 and the second non-direct power supply and distribution sub-circuit 520, compatibility of circuit power supply is improved.

Referring to fig. 1, the second direct current power distribution sub-circuit 510 may include 3 branch power distribution circuits, each of which is configured with one fuse, namely, a ninth fuse 5110, a tenth fuse 5120, and an eleventh fuse 5130. The second non-direct current power distribution sub-circuit 520 may include 3 branch power distribution circuits, each of which is configured with one fuse, namely, a twelfth fuse 5210, a thirteenth fuse 5220 and a fourteenth fuse 5230, and the second set of relays may include 3 branch power distribution circuits in which a sixth relay 5240, a seventh relay 5250 and an eighth relay 5260,3 are respectively disposed in the second non-direct current power distribution sub-circuit 520. In addition, since each relay in the second group of relays is electrically connected to the fuel cell controller 10, it is realized that the fuel cell controller 10 controls the on-off of the second non-direct power supply and distribution sub-circuit 520. The relay arrangement is shown in fig. 1, wherein the sixth relay 5240 includes a sixth coil K6 and a sixth switch A6, the seventh relay 5250 includes a seventh coil K7 and a seventh switch A7, the eighth relay 5260 includes an eighth coil K8 and an eighth switch A8, and the sixth coil K6, the seventh coil K7, and the eighth coil K8 are all connected to the low-side driving port of the fuel cell controller 10.

Since each relay in the second set of relays is electrically connected to the fuel cell controller 10, the fuel cell controller 10 is configured to control the on/off of the second non-direct power supply/distribution sub-circuit 520.

The whole vehicle controller 70 sends out a wake-up signal for the fuel cell controller 10, so that the wake-up circuit 30 wakes up the fuel cell controller 10, the voltage conversion circuit 20 provides power to the fuel cell controller 10, and the first power distribution circuit 40 and the second power distribution circuit 50 provide power to the electrical devices of the fuel cell system.

In some embodiments, referring to fig. 1, the fuel cell system may further include: the first contact end of the second relay 80 is connected with the positive electrode of the storage battery 60, the second contact end of the second relay 80 is respectively connected with the input end of the first power distribution circuit 40 and the input end of the voltage conversion circuit 20, and the control end of the second relay 80 is connected with the fuel cell controller 10; after the fuel cell controller 10 wakes up, the fuel cell controller 10 controls the first contact terminal and the second contact terminal of the second relay 80 to be closed.

The second relay 80 includes a second coil K2 and a second switch A2, the control terminal of the second relay 80 is located at the second coil K2, the first contact terminal of the second relay 80 and the second contact terminal of the second relay 80 are located at the second switch A2, and the second coil K2 is connected to the low side driving port of the fuel cell controller 10.

It should be noted that, after the fuel cell controller 10 monitors the wake-up signal, the first contact end and the second contact end of the second relay 80 may be controlled to be closed, that is, the power supply of the storage battery 60 is powered on and interlocked, at this time, even if the wake-up signal of the whole vehicle controller 70 is disabled, the fuel cell controller 10 can ensure that the power supply of the storage battery 60 is normal. In addition, if the fuel cell controller 10 detects wake-up disablement, a time-lapse power-down procedure may be performed. Therefore, by providing the second relay 80, the normal operation of the fuel cell controller 10 is ensured, and the circuit stability is improved.

In some embodiments, referring to fig. 1, the fuel cell system may further include: the input end of the voltage conversion circuit 20 is connected with the storage battery 60 of the vehicle through the first connector 90, the input end of the first power distribution circuit 40 is connected with the output end of the storage battery 60 through the first connector 90, the wake-up circuit 30 is connected with the whole vehicle controller 70 of the vehicle through the first connector 90, the second connector 91 is arranged at the output end of the first power distribution circuit 40, the third connector 92 is arranged at the output end of the second power distribution circuit 50, and the fourth connector 93 is arranged at the output end of the voltage conversion circuit 20.

It should be noted that, the power source converted by the voltage conversion circuit 20 is an isolated power source, the fuel cell controller 10 uses the isolated power source to supply power, and directly drives the PWM driving element, the full-bridge driving element, and the half-bridge driving element, and meanwhile, signals of sensors such as a temperature sensor, a pressure sensor, a flow sensor, and the like are collected, so that the sensor signals are also isolated signals, the pressure sensor power source of the water path and the fuel high voltage power source are isolated, no breakdown risk exists, the fuel cell system leaves the factory for insulation detection, and the 1000V direct current withstand voltage test cannot be broken down. The fuel cell system has multiple CAN (Contro l l er Area Network, control area network) which are all isolated CAN and CAN communicate with the vehicle controller 70, low voltage components and high voltage components.

At present, a hydrogen fuel cell system is carried on a whole vehicle and needs to be matched with various vehicle types, a low-voltage platform is mainly provided with 12V (passenger vehicles), 24V (commercial vehicles), the parts of a fuel system on the market are also five-flower eight doors, high-voltage parts are mainly provided with 12V/DC350V (passenger vehicle voltage platform) and 24V/DC540V (commercial vehicle voltage platform), and sensors are respectively provided with three types of 5V,12V and 24V; actuators such as half-bridge driven proportional valves, full-bridge driven thermostats, back pressure valves, and the like often use 12V and 24V as driving power sources. The FCCU is used as a control core of the fuel system, if the fuel system is developed by a vehicle type in the early development stage, the voltage platform can lock the low-voltage platform of the BOP according to the voltage platform of the FCCU, so that the commercial vehicle and the passenger vehicle can not be compatible with the low-voltage platform; special equipment with low-pressure platforms of 48V,72V and the like, such as a forklift, are also arranged on the market, and a hydrogen fuel system is also carried, so that the problems are also faced; the hydrogen fuel system has the advantages that a special heat dissipation mode is adopted, the electrified electrode is directly cooled by the cooling liquid, the cooling liquid is electrified, the low-voltage sensor with low voltage of 12V or 5V on a cooling circuit has a withstand voltage of only 500VDC (national standard requirement), and the waterway sensor is frequently broken down and has high failure rate in the working process of the fuel cell; the fuel cell FCCU is a low-voltage component, and the inside of the fuel cell FCCU is electrically the negative electrode of the storage battery 60, namely a vehicle body shell, so that the electromagnetic compatibility problem is not easy to rectify.

It should be noted that, in the embodiment of the present invention, the voltage conversion circuit 20 has protection measures such as constant voltage current limiting function, overvoltage and undervoltage, overcurrent, short circuit, etc., so that the problem of system instability caused by voltage fluctuation of the power battery can be effectively prevented, and the voltage conversion circuit 20 can be designed into an isolation mode, so that the EMC interference problem can be effectively solved; the housing of the fuel cell system can be designed to be IP67 and IP6K9K protection class, connected to the outside via connectors. The circuit adopted by the embodiment of the invention is simple and reliable, has low cost, can realize compatibility of low-voltage platforms, is a platform product, and is suitable for batch products. The inside of the fuel cell system adopts a PCB board design, and the wake-up circuit 30, the DC/DC converter 220, and the power distribution circuit are integrated on one PCB board.

In the embodiment of the invention, for a passenger car, the storage battery is mostly 12v, the first power distribution circuit can supply power for high-power electrical equipment with rated voltage of 12v or low-power electrical equipment with rated voltage of 12v in the fuel cell system, the second power distribution circuit can supply power for low-power electrical equipment with rated voltage of 12v in the fuel cell system, and the power supply converted by the voltage conversion circuit can supply power for the fuel cell controller; for commercial vehicles, the storage battery is mostly 24v, the first power distribution circuit can supply power for high-power electrical equipment with rated voltage of 24v or low-power electrical equipment with rated voltage of 24v in the fuel cell system, the second power distribution circuit can supply power for low-power electrical equipment with rated voltage of 12v in the fuel cell system, and the power supply converted by the voltage conversion circuit can supply power for the fuel cell controller. Therefore, for different vehicle types, the storage battery can supply power for the fuel cell system, so that the universality of the fuel cell system is improved.

Based on the same inventive concept, an embodiment of the present invention provides a vehicle including the fuel cell system of any one of the above embodiments.

It should be appreciated that, in the embodiments of the present invention, further implementation details of the vehicle are described with reference to the foregoing fuel cell system, and are not repeated herein for brevity of description.

The above description is only an example of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims (10)

1. A fuel cell system for use in a vehicle, comprising:

A fuel cell controller, the rated voltage of the fuel cell controller being in a preset voltage range;

The input end of the voltage conversion circuit is connected with the storage battery of the vehicle, the output end of the voltage conversion circuit is connected with the fuel cell controller, and the output voltage of the voltage conversion circuit is in the preset voltage range;

The wake-up circuit is provided with a first input end which is used for being connected with a whole vehicle controller of the vehicle, a second input end of the wake-up circuit is connected with an output end of the voltage conversion circuit, and an output end of the wake-up circuit is connected with the fuel cell controller;

the input end of the first power distribution circuit is connected with the output end of the storage battery;

And the input end of the second power distribution circuit is connected with the output end of the voltage conversion circuit.

2. The fuel cell system according to claim 1, wherein the voltage conversion circuit includes:

The first end of the first fuse is connected with the positive electrode of the storage battery;

The first input end of the DC/DC converter is connected with the second end of the first fuse, the second input end of the DC/DC converter is connected with the negative electrode of the storage battery, the first output end of the DC/DC converter is respectively connected with the input end of the second power distribution circuit, the second input end of the wake-up circuit and the normal electric end of the fuel cell controller, and the second output end of the DC/DC converter is respectively connected with the grounding end and the grounding wire of the fuel cell controller.

3. The fuel cell system according to claim 2, wherein the voltage conversion circuit further comprises:

the first output end of the DC/DC converter is respectively connected with the input end of the second power distribution circuit, the second input end of the wake-up circuit and the normal electric end of the fuel cell controller through the filter, and the second output end of the DC/DC converter is respectively connected with the grounding end and the grounding wire of the fuel cell controller through the filter.

4. The fuel cell system according to claim 3, wherein the wake-up circuit includes:

The positive electrode of the anti-reflection diode is connected with the output end of the whole vehicle controller;

The first end of the first resistor is connected with the negative electrode of the anti-reflection diode;

the first end of the second resistor is connected with the second end of the first resistor;

The grid electrode of the MOS tube is respectively connected with the first end of the second resistor and the second end of the first resistor, and the source electrode of the MOS tube is respectively connected with the second end of the second resistor and the ground wire;

the first end of the third resistor is connected with the first end of the first resistor and the negative electrode of the anti-reflection diode respectively;

the first end of the fourth resistor is connected with the first output end of the DC/DC converter;

The control end of the first relay is connected with the drain electrode of the MOS tube, the first contact end of the first relay is connected with the positive electrode of the storage battery, and the second contact end of the first relay is respectively connected with the first end of the first fuse and the input end of the first power distribution circuit;

The anode of the isolation optocoupler is connected with the second end of the third resistor, the cathode of the isolation optocoupler is respectively connected with the source electrode of the MOS tube, the second end of the second resistor and the grounding wire, the collector of the isolation optocoupler is connected with the second end of the fourth resistor, and the emitter of the isolation optocoupler is connected with the wake-up signal end of the fuel cell controller.

5. The fuel cell system of claim 4, wherein the wake-up circuit further comprises:

The positive electrode of the voltage stabilizing diode is respectively connected with the second end of the second resistor, the grounding wire and the source electrode of the MOS tube, and the negative electrode of the voltage stabilizing diode is respectively connected with the second end of the first resistor, the first end of the second resistor and the gate electrode of the MOS tube.

6. The fuel cell system of claim 5, wherein the first power distribution circuit comprises:

The input end of the first direct power supply and distribution sub-circuit is connected with the second contact end of the first relay, and the first direct power supply and distribution sub-circuit is provided with a fuse;

The fuel cell controller comprises a first non-direct power supply and distribution sub-circuit, wherein the input end of the first non-direct power supply and distribution sub-circuit is connected with the second contact end of the first relay, the first non-direct power supply and distribution sub-circuit is provided with a fuse and a first group of relays, and each relay in the first group of relays is electrically connected with the fuel cell controller.

7. The fuel cell system of claim 6, wherein the second power distribution circuit comprises:

The input end of the second direct-current power supply and distribution sub-circuit is connected with the first output end of the DC/DC converter, and the second direct-current power supply and distribution sub-circuit is provided with a fuse;

And the input end of the second non-direct power supply and distribution sub-circuit is connected with the first output end of the DC/DC converter, the second non-direct power supply and distribution sub-circuit is provided with a fuse and a second group of relays, and each relay in the second group of relays is electrically connected with the fuel cell controller.

8. The fuel cell system according to claim 1, wherein,

The whole vehicle controller sends a wake-up signal aiming at the fuel cell controller, so that the wake-up circuit wakes up the fuel cell controller, the voltage conversion circuit provides power for the fuel cell controller, and the first power distribution circuit and the second power distribution circuit supply power for electrical equipment of the fuel cell system.

9. The fuel cell system according to any one of claims 1 to 8, characterized by further comprising:

The first contact end of the second relay is connected with the positive electrode of the storage battery, the second contact end of the second relay is respectively connected with the input end of the first power distribution circuit and the input end of the voltage conversion circuit, and the control end of the second relay is connected with the fuel cell controller;

After the fuel cell controller wakes up, the fuel cell controller controls the first contact end and the second contact end of the second relay to be closed.

10. A vehicle comprising the fuel cell system according to any one of claims 1 to 9.