CN214254480U

CN214254480U - 30kW hydrogen fuel cell stack control system

Info

Publication number: CN214254480U
Application number: CN202021667232.XU
Authority: CN
Inventors: 张运枝; 程万里
Original assignee: Nanjing Liangzhiyuan Power Technology Co ltd
Current assignee: Hangzhou runhydrogen Technology Co.,Ltd.
Priority date: 2020-08-12
Filing date: 2020-08-12
Publication date: 2021-09-21
Anticipated expiration: 2030-08-12

Abstract

The utility model discloses a 30kW hydrogen fuel cell pile control system, including fuel galvanic pile unit, galvanic pile system control module, DC-DC module, power output protection unit, water cooling circuit, hydrogen return circuit, air circuit. By optimally configuring the components for controlling the 30kW hydrogen fuel cell stack, the system realizes safe operation of the system, prevents accidents and prolongs the service life of the 30kW hydrogen fuel cell stack control system.

Description

30kW hydrogen fuel cell stack control system

Technical Field

The utility model belongs to new forms of energy power supply field specifically is 30kW hydrogen fuel cell stack control system.

Background

The fuel cell is a device for obtaining electric energy by converting chemical energy of hydrogen and oxygen into electric energy, and compared with the traditional fuel conversion electric energy mode, the fuel cell is not limited by Carnot cycle, the theoretical electric energy conversion efficiency can reach 80%, and the efficiency is higher. The proton exchange membrane fuel cell stack product using hydrogen as fuel is water, has no pollution discharge and relatively lower working time noise, and is an energy source direction with high prospect.

The 30kW hydrogen fuel cell stack control system comprises a fuel cell stack, a control module, a hydrogen loop, an air loop and a water loop, wherein all parts work cooperatively to realize the operation of the fuel cell stack system.

Disclosure of Invention

The utility model discloses a purpose is 30kW hydrogen fuel cell stack control system, provides and uses safety and improvement life.

The utility model adopts the implementation scheme that; a30 kW hydrogen fuel electric pile system comprises a fuel electric pile, a control module, a hydrogen loop, an air loop, a water loop, a power output protection module and a DC-DC module. The water loop is used for controlling the temperature of the fuel electric pile and is also used for adjusting the temperature of air supplied by an air compressor of the air loop. The safety control loop is used for controlling power output and detecting hydrogen leakage. The control module is used for controlling the fuel cell stack, the hydrogen loop, the air loop, the water loop, the power output protection module and the DC-DC module to work.

The hydrogen loop comprises a hydrogen cylinder, a pressure reducing valve, an air inlet valve, a proportional valve, a hydrogen channel of the fuel galvanic pile, a circulating pump and an exhaust valve, wherein the circulating pump is connected with the fuel galvanic pile in parallel, the flow direction of the hydrogen is opposite, the hydrogen flows to the direction of the exhaust valve through the fuel galvanic pile sequentially by the hydrogen cylinder, and part of the hydrogen returns to the fuel galvanic pile through the circulating pump at the inlet of the exhaust valve.

The air circuit comprises an air compressor, an intercooler, a humidifier and an air channel of the fuel cell stack, air is sucked into the system by the air compressor, is cooled by the intercooler and humidified by the humidifier, and then enters the fuel cell stack, and after reaction, water which is a reaction product is taken to enter the humidifier, so that the air entering the cell stack is humidified and heated, and then is discharged out of the system.

The water loop comprises a water pump, a radiator, a filter, an expansion water tank, a deionizer, a tee joint and a water channel of the fuel cell stack. Wherein, the water pump of flowing through, the radiator, the cooling of air compressor machine air is realized to the water of intercooler, and expansion tank realizes the regulation to water pressure in the water return circuit, and the regulation to the temperature in water return circuit is realized to the water of the water passageway of radiator, water pump, tee bend, fuel cell stack of flowing through.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of a hydrogen loop of a 30kW hydrogen fuel cell stack control system according to the present invention.

Fig. 2 is a schematic structural diagram of an embodiment of an air circuit of a 30kW hydrogen fuel cell stack control system according to the present invention.

Fig. 3 is a schematic structural diagram of an embodiment of a water loop of a 30kW hydrogen fuel cell stack control system according to the present invention.

Fig. 4 is a schematic structural diagram of an embodiment of a power output protection circuit of a 30kW hydrogen fuel cell stack control system according to the present invention.

Fig. 5 is an embodiment of a sensor set of a 30kW hydrogen fuel cell stack control system according to the present invention.

Detailed Description

The structure of the present invention will be further described with reference to the accompanying drawings.

As shown in fig. 1, the hydrogen circuit includes a pressure reducing valve K1, an intake valve K2, a proportional valve K3, a fuel cell stack H, an exhaust valve K4, and a circulation pump M1. The hydrogen enters an H fuel inlet of the fuel cell stack after sequentially passing through a pressure reducing valve K1, an air inlet valve K2 and a proportional valve K3, flows out of an H fuel outlet of the fuel cell stack, and returns to the H fuel inlet of the fuel cell stack through a circulating pump M1 or is discharged out of the system through an exhaust valve K4.

As shown in fig. 2, the air circuit includes an air compressor M2, an intercooler L1, a humidifier L2, and a fuel cell stack H. The air is compressed by an air compressor M2, enters a humidifier L2 after passing through an intercooler L1, flows into an air inlet of the fuel cell stack H, flows out of an air outlet of the fuel cell stack H, and flows out of the system after passing through a humidifier L2.

As shown in fig. 3, the water circuit includes a water cooling circuit passing through a water pump M3, a radiator T1, an intercooler L1, a heating circuit passing through a fuel cell stack H, a water pump M3, a three-way valve K5, a filter L3, a constant pressure circuit passing through the fuel cell stack H, a water pump M3, a radiator T1, a three-way valve K5, a heat dissipation circuit of a filter L3, a water pump M3, an expansion tank F1, and a deionizer L4. In the water cooling loop, water flows out of the intercooler L1, flows into the water pump M3, passes through the radiator T1, and returns to the intercooler L1. In the heating loop, water flows out from a cooling liquid outlet of the fuel cell stack H, flows into a water pump M3, passes through a tee joint K5, passes through a filter L3, and flows into the fuel cell stack H from the cooling liquid outlet of the fuel cell stack H. In the heat dissipation loop, water flows out from a cooling liquid outlet of the fuel cell stack H, flows into a water pump M3, flows into a three-way valve K5 after passing through a radiator T1, and flows into a cooling liquid inlet of the fuel cell stack H after passing through a filter L3. In the constant pressure loop, water flows out of the water pump, is divided into two paths after passing through the expansion water tank, one path directly returns to the water pump, and the other path returns to the water pump M3 after passing through the deionizer L4, the filter L3 and the fuel cell stack H.

As shown in fig. 4, the power output protection module includes a diode D1 connected to the positive electrode of the H power output port of the fuel cell stack, a relay S2 connected to the cathode of the diode, a discharging resistor R1 connected to the relay S2, the discharging resistor R1 connected to the negative electrode of the H power output port of the fuel cell stack, a relay S1 connected to the cathode of the diode D1, a relay S1 connected to the positive electrode of the input port of the DC-DC module D, a relay S3 connected to the positive electrode of the input port of the DC-DC module D, a bleeder R2 connected to the relay S3, and a bleeder R2 connected to the negative electrode of the input port D of the DC-DC module.

As shown in fig. 5, the sensor module of the control module includes a pressure sensor G1 located in the hydrogen channel before the fuel cell stack H, a pressure sensor G5 located in the hydrogen channel after the fuel cell stack, a pressure sensor G8 located at the inlet of the air channel fuel cell stack, a temperature and humidity sensor G3, a temperature sensor G2 located at the inlet of the water channel fuel cell stack H, a temperature sensor G4 located at the outlet of the water channel fuel cell stack H, a current sensor G6 and a voltage sensor G7 located at the power outlet of the fuel cell stack, and a hydrogen sensor located inside the system.

The safety control method of the 30kW hydrogen fuel cell system comprises the following specific implementation methods; the system control module obtains the specific operation state and the upper computer command in the system and carries out normal shutdown and emergency shutdown on the system.

Normal shutdown of the system; the system control module closes K2, K3, M1, and closes after K is turned on for 40.2 seconds. Reducing the power of M3 to 10%, reducing T1 to 10%, keeping S1 closed, keeping S2, cutting off S3, adjusting the D input end to be in a constant voltage mode until hydrogen inside the pile is exhausted, and closing all modules.

A system emergency shutdown condition; and the system control module closes K2, K3 and M1, closes the system control module for a plurality of times after opening K40.2 seconds until the pressure of hydrogen in the galvanic pile is reduced to 0.05bar, closes K4, M3 and T1, cuts off S1, closes S2 and S3 until the hydrogen in the galvanic pile is exhausted, and closes all the modules.

Claims

1. A30 kW hydrogen fuel cell stack control system comprises a fuel cell stack unit, a cell stack system control module, a DC-DC module, a power output protection unit, a water cooling loop, a hydrogen loop and an air loop;

the fuel cell system is characterized in that the electric pile system control module is used for controlling a fuel cell unit, an electric pile protection unit, a water cooling loop, a hydrogen loop, an air loop and a DC-DC module;

the air circuit humidifies air by reaction product water;

the DC-DC module and the power output protection unit jointly protect the electric pile system.

2. The 30kW hydrogen fuel cell stack control system of claim 1, wherein the stack system control module comprises an upper computer interaction module, a sensor module and a control module, and the upper computer interaction module realizes the interaction between an upper computer and the stack system in a CAN communication mode; the sensor module is a sensor arranged on the water cooling loop, the hydrogen loop, the air loop and the power output loop; the control module comprises electric driving components on each loop and the pile protection unit.

3. The 30kW hydrogen fuel cell stack control system of claim 1, wherein the positive input end of the DC-DC module is connected to the cathode of a diode D1 through a relay S1, and the anode of the diode D1 is connected to the power outlet of the fuel cell stack unit.

4. The 30kW hydrogen fuel cell stack control system as set forth in claim 1, wherein the power output protection unit includes a discharge resistor connected to the cathode of the diode D1 through a relay S2, a hydrogen leakage sensing unit, and a relay S1 for disconnecting the load.

5. The 30kW hydrogen fuel cell stack control system of claim 1 wherein the power output protection unit includes a bleeder connected to the DC-DC positive input via a relay S3.

6. The 30kW hydrogen fuel cell stack control system as set forth in claim 1, wherein the hydrogen circuit includes a high-pressure hydrogen cylinder, a pressure reducing valve, an intake valve, a proportional valve, a hydrogen passage of the fuel cell stack unit, a circulation pump and an exhaust valve which are connected in series.

7. The 30kW hydrogen fuel cell stack control system as set forth in claim 1, wherein the air circuit includes an air passage of a frequency converter, an air compressor, an intercooler, a humidifier, a fuel cell stack unit connected in sequence; the humidifier humidifies air discharged from the fuel cell stack unit by moisture.

8. The 30kW hydrogen fuel cell stack control system according to claim 1, wherein the water cooling circuit comprises an intercooler, a three-way valve, a water pump, a filter, a radiator, a deionizer, an expansion tank, and comprises a first passage and a second passage, wherein coolant in the first passage enters a water inlet of the water pump through a water outlet of the fuel cell stack unit, and is connected to the water inlet of the fuel cell stack unit through the filter after passing through the three-way valve from a water outlet of the water pump; meanwhile, the cooling liquid enters a water pump from a water outlet of the intercooler, enters the radiator from a water outlet of the water pump, and returns to the intercooler from a water outlet of the radiator; in the second passage, the cooling liquid flows out of a water outlet of the fuel electric pile unit, flows into the radiator after passing through the water pump, and then flows into the fuel electric pile unit after passing through the three-way valve; the cooling liquid in the intercooler flows into the water pump and then returns to the intercooler after passing through the radiator; the inlet of the expansion water tank is connected with the water outlet of the water pump, and the two outlets are connected with the water inlet and the water outlet of the fuel electric pile unit.