CN215988868U

CN215988868U - Controller of fuel cell power generation device

Info

Publication number: CN215988868U
Application number: CN202121918140.9U
Authority: CN
Inventors: 张聪; 孙佳; 吴骁
Original assignee: Wuhan Hydrogen Energy and Fuel Cell Industry Technology Research Institute Co Ltd
Current assignee: Wuhan Hydrogen Energy and Fuel Cell Industry Technology Research Institute Co Ltd
Priority date: 2021-08-16
Filing date: 2021-08-16
Publication date: 2022-03-08
Anticipated expiration: 2031-08-16

Abstract

The utility model discloses a controller of a fuel cell power generation device, which comprises a control chip, a plurality of analog input conditioning circuits, a plurality of analog output conditioning circuits, a plurality of switching value input conditioning circuits, a plurality of switching value output power driving circuits, a plurality of PWM output signal power driving circuits and a communication circuit, wherein the plurality of analog input conditioning circuits, the plurality of analog output conditioning circuits, the plurality of switching value input conditioning circuits, the plurality of switching value output power driving circuits, the plurality of PWM output signal power driving circuits and the communication circuit are all electrically connected with the control chip. The utility model solves the technical problem that the controller in the prior art can not completely meet the control requirement of the fuel cell power generation device.

Description

Controller of fuel cell power generation device

Technical Field

The utility model relates to the technical field of fuel cell power generation, in particular to a controller of a fuel cell power generation device.

Background

The control of a fuel cell power plant involves the measurement of numerous different physical quantities and the control of different actuators: the physical quantities mainly include pressure, temperature, flow, current, voltage, etc.; the executive device comprises an electromagnetic valve, a pressure regulating valve, a water pump, an air compressor, a hydrogen circulating pump, a throttle valve, a cooling fan, a strong current switch and the like; the various components must also cooperate with each other to optimize matching. Therefore, the fuel cell power plant requires a controller to manage the various components in the system.

The utility model patent No. 200580019686.8 discloses a control device and a control method for a fuel cell power generation device, which can realize that the fuel cell power generation device operates in a power generation command mode that minimizes the energy of a fuel cell system, but only discloses a control method, and does not disclose the specific structure of a controller.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to overcome the above technical deficiencies, and to provide a controller for a fuel cell power plant, which solves the technical problem that the controller in the prior art cannot completely meet the control requirements of the fuel cell power plant.

In order to achieve the technical purpose, the utility model adopts the following technical scheme:

a controller of a fuel cell power generation device comprises a control chip, a plurality of analog input conditioning circuits, a plurality of analog output conditioning circuits, a plurality of switching value input conditioning circuits, a plurality of switching value output power driving circuits, a plurality of PWM output signal power driving circuits and a communication circuit, wherein the plurality of analog input conditioning circuits, the plurality of analog output conditioning circuits, the plurality of switching value input conditioning circuits, the plurality of switching value output power driving circuits, the plurality of PWM output signal power driving circuits and the communication circuit are all electrically connected with the control chip,

the analog quantity input conditioning circuit is used for conditioning an input analog quantity signal and outputting the conditioned signal to the control chip;

the analog quantity output conditioning circuit is used for conditioning and outputting the signal output by the control chip;

the switching value input conditioning circuit is used for conditioning an input switching value signal and outputting the conditioned switching value signal to the control chip;

the switching value output power driving circuit is used for performing level conversion on the switching value signal output by the control chip and then outputting the switching value signal;

the PWM output signal power driving circuit is used for outputting a driving signal to a target component according to the PWM signal output by the control chip;

the communication circuit is used for communication.

Preferably, in the controller of the fuel cell power generation device, the control chip is a single chip microcomputer of the type MC9S12XEP100, the single chip microcomputer is connected with the plurality of analog input conditioning circuits, the plurality of analog output conditioning circuits, the plurality of switching value input conditioning circuits, the plurality of switching value output power driving circuits and the plurality of PWM output signal power driving circuits through an IO pin, and the single chip microcomputer is further connected with the communication circuit through a plurality of communication interfaces.

Preferably, in the controller of the fuel cell power generation device, the analog input conditioning circuit includes a first resistor, a second resistor, a third resistor, a fourth resistor, a first capacitor and a second capacitor, a power supply is connected to one end of the first resistor, one end of the second resistor, one end of the fourth resistor, one end of the first capacitor and the analog signal input terminal are connected to the other end of the first resistor, one end of the third resistor, one end of the second capacitor and an IO pin of the single chip microcomputer are connected to the other end of the second resistor, and the other end of the first capacitor, the other end of the fourth resistor, the other end of the third resistor and the other end of the second capacitor are grounded.

Preferably, in the controller of the fuel cell power generation device, the analog output conditioning circuit includes a digital-to-analog conversion chip, a first low-pass filter, an amplifier, and a second low-pass filter, an input end of the digital-to-analog conversion chip is connected to an IO pin of the single chip microcomputer, an analog signal output end of the digital-to-analog conversion chip is connected to an input end of the first low-pass filter, an output end of the first low-pass filter is connected to a non-inverting input end of the amplifier, an inverting input end of the amplifier is grounded, an output end of the amplifier is connected to an input end of the second low-pass filter, and an output end of the second low-pass filter is used for outputting a conditioned analog signal.

Preferably, in the controller of the fuel cell power generation device, the switching value input conditioning circuit includes a fifth resistor, a sixth resistor, a seventh resistor, a third capacitor, a fourth capacitor, and a first diode, one end of the fifth resistor is used for inputting a switching signal, the other end of the fifth resistor is connected to one end of the third capacitor, one end of the sixth resistor, and a cathode of the first diode, an anode of the first diode is connected to one end of the seventh resistor, one end of the fourth capacitor, and an IO pin of the single chip microcomputer, the other end of the third capacitor, the other end of the sixth resistor, and the other end of the fourth capacitor are all grounded, and the other end of the seventh resistor is connected to the power supply.

Preferably, in the controller of the fuel cell power generation apparatus, the switching value output power driving circuit includes a power driving chip, an input terminal of the power driving chip is connected to an IO pin of the single chip, and an output terminal of the power driving chip is used for outputting a signal.

Preferably, in the controller of the fuel cell power generation device, the PWM output signal power driving circuit includes a PWM driving chip, an input terminal of the PWM driving chip is connected to an IO pin of the single chip, and an output terminal of the PWM driving chip outputs a driving signal to the target component.

Preferably, in the controller of the fuel cell power generation device, the communication circuit includes a plurality of CAN communication circuits and a plurality of RS485 communication circuits, and the plurality of CAN communication circuits and the plurality of RS485 communication circuits are all connected to the single chip microcomputer.

Preferably, in the controller of the fuel cell power generation device, the CAN communication circuit includes a CAN communication chip, and the CAN communication chip is connected to the communication interface of the single chip microcomputer and is used for realizing the CAN communication between the single chip microcomputer and external equipment.

Preferably, in the controller of the fuel cell power generation device, the RS485 communication circuit includes an RS485 communication chip, and the RS485 communication chip is connected to the communication interface of the single chip microcomputer, so as to realize 485 communication between the single chip microcomputer and external equipment.

Compared with the prior art, the controller of the fuel cell power generation device provided by the utility model has the advantages that the analog input conditioning circuit can be randomly configured into a measuring current type signal, a measuring voltage type signal or a measuring resistance type signal by welding different resistors without redrawing a circuit board, the switching value output power driving circuit can directly drive an external electromagnetic valve without adding an electromagnetic valve driving part outside the controller, the PWM output signal power driving circuit can directly drive an external hydrogen regulating valve without adding a regulating valve driving part outside the controller, the control chip is used as a CPU to complete the data processing of the whole system, the characteristics of short measuring period and good measuring real-time property are realized, the controller can manage all parts in the system by comprehensively utilizing an integration technology, and the controller has the advantages of more adaptive signals, small volume, strong electromagnetic interference resistance and the like, High reliability.

Drawings

FIG. 1 is a block diagram of a controller of a fuel cell power plant according to a preferred embodiment of the present invention;

FIG. 2 is a schematic diagram of a preferred embodiment of the analog input conditioning circuit in the controller of the fuel cell power plant provided by the present invention;

FIG. 3 is a schematic diagram of a preferred embodiment of the analog output conditioning circuit in the controller of the fuel cell power plant provided by the present invention;

fig. 4 is a schematic diagram of a preferred embodiment of the switching value input conditioning circuit in the controller of the fuel cell power plant provided by the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

Referring to fig. 1, a controller of a fuel cell power generation apparatus according to an embodiment of the present invention includes a control chip 1, a plurality of analog input conditioning circuits 2, a plurality of analog output conditioning circuits 3, a plurality of switching input conditioning circuits 4, a plurality of switching output power driving circuits 5, a plurality of PWM output signal power driving circuits 6, and a communication circuit 7, where the plurality of analog input conditioning circuits 2, the plurality of analog output conditioning circuits 3, the plurality of switching input conditioning circuits 4, the plurality of switching output power driving circuits 5, the plurality of PWM output signal power driving circuits 6, and the communication circuit 7 are electrically connected to the control chip 1.

In this embodiment, the analog input conditioning circuit 2 is configured to condition an input analog signal and output the conditioned signal to the control chip 1, the analog input conditioning circuit 2 is configured to receive a signal output by an external sensor, and the conditioned signal can be configured into a current type, a voltage type, or a resistance type signal circuit according to the type of an output signal of the external sensor, and the control chip 1 can provide a power supply for the sensor. In this embodiment, the number of the analog input conditioning circuits 2 is 23, and the analog input conditioning circuits can receive analog signals sent by different sensors.

The analog output conditioning circuit 3 is configured to condition the signal output by the control chip 1 and output the conditioned signal, and specifically may perform digital-to-analog conversion, filtering, and amplification on the signal output by the control chip 1 and provide a signal to an external device, for example, control the rotation speed of a fan. In this embodiment, the number of the analog output conditioning circuits 3 is 4.

The switching value input conditioning circuit 4 is configured to condition an input switching value signal and output the conditioned signal to the control chip 1, specifically, is configured to filter the input switching value signal and output the filtered signal to the control chip 1, and may be configured to receive a switching value signal input by a device such as a solenoid valve. In this embodiment, the number of the switching value input conditioning circuits 4 is 8.

Switching value output power drive circuit 5 is used for right the switching value signal of control chip 1 output carries out output after the level switch, can play the cushioning effect through the level switch, isolated outside high frequency interference, can increase output signal's drive ability moreover, reduces control chip 1's burden, can be used to output switching value signal to equipment such as solenoid valve class. In this embodiment, the number of the switching value output power driving circuits 5 is 16.

The PWM output signal power driving circuit 6 is configured to output a driving signal to a target component according to the PWM signal output by the control chip 1, and may be configured to drive components such as a hydrogen regulating valve or components such as a variable frequency fan. In this embodiment, the number of the PWM output signal power driving circuits 6 is 7.

The communication circuit 7 is used for communication.

In the embodiment of the utility model, the analog input conditioning circuit 2 can be configured to measure current type, voltage type or resistance type signals at will by welding different resistors without redrawing a circuit board, the switching value output power driving circuit 5 can directly drive an external electromagnetic valve without adding an electromagnetic valve driving part outside a controller, the PWM output signal power driving circuit 6 can directly drive an external hydrogen regulating valve without adding an adjusting valve driving part outside the controller, the control chip 1 is used as a CPU to complete the data processing of the whole system, and the method has the characteristics of short measuring period and good measuring real-time property, comprehensively uses an integration technology, enables the controller to manage all parts in the system, further enables the controller to have the characteristics of more adapting signals, small volume, strong electromagnetic interference resistance and high reliability.

In a preferred embodiment, the control chip 1 is a single chip microcomputer of a type MC9S12XEP100, the single chip microcomputer is connected to the plurality of analog input conditioning circuits 2, the plurality of analog output conditioning circuits 3, the plurality of switching input conditioning circuits 4, the plurality of switching output power driving circuits 5, and the plurality of PWM output signal power driving circuits 6 through an IO pin, and the single chip microcomputer is further connected to the communication circuit 7 through a plurality of communication interfaces.

In this embodiment, the control chip is a model MC9S12XEP100 chip manufactured by the company missilcare. The single chip microcomputer can be called as a flagship product of a flying-chip 16-bit single chip microcomputer, and has very strong functions and performances. Based on an enhanced HCS12X CPU, the working frequency can reach 50 MHz. The flagship integrates a 1MB internal flash memory, a 64kB internal RAM, a 4kB EEPROM, a 16-channel 12-bit analog-to-digital converter and 91 universal I/O pins. The device is also provided with a plurality of peripheral devices, 8 SCI serial ports, 5 CAN interfaces, 3 SPI interfaces and 1 IIC interface, and the clock module is provided with two ECT interfaces and two TIM interfaces. The chip is also provided with an enhanced XGATE coprocessor to improve performance, and the running speed is twice of the main processor bus frequency. The peripheral circuit of the chip is simple, and the CPU can work only by a small amount of configuration.

In a preferred embodiment, referring to fig. 2, the analog input conditioning circuit 2 includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a first capacitor C1, and a second capacitor C2, one end of the first resistor R1 is connected to a power supply, the other end of the first resistor R1 is connected to one end of the second resistor R2, one end of the fourth resistor R4, one end of the first capacitor C1, and an analog signal input terminal, the other end of the second resistor R2 is connected to one end of the third resistor R3, one end of the second capacitor C2, and an IO pin of the single chip, and the other end of the first capacitor C1, the other end of the fourth resistor R4, the other end of the third resistor R3, and the other end of the second capacitor C2 are grounded.

In this embodiment, the analog input circuit 2 may be configured to be a current-type, voltage-type, or resistance-type signal circuit according to the type of the output signal of the external sensor, and the controller may provide a power supply for the sensor. When the current-mode acquisition circuit is configured, the first resistor R1 and the third resistor R3 are not welded, the fourth resistor R4 is used as a sampling resistor, and the second resistor R2 and the second capacitor C2 form a low-pass filter circuit; when the voltage type acquisition circuit is configured, the first resistor R1 and the fourth resistor R4 are not welded, the second resistor R2 and the third resistor R3 form a voltage division circuit, and the second resistor R2 and the second capacitor C2 form a low-pass filter circuit; when the circuit is configured into a resistance type acquisition circuit, the third resistor R3 and the fourth resistor R4 are not welded, and the second resistor R2 and the second capacitor C2 form a low-pass filter circuit.

In a preferred embodiment, referring to fig. 3, the analog output conditioning circuit 3 includes a digital-to-analog conversion chip 31, a first low-pass filter 32, an amplifier 33, and a second low-pass filter 34, an input end of the digital-to-analog conversion chip 31 is connected to an IO pin of the single chip microcomputer, an analog signal output end of the digital-to-analog conversion chip 31 is connected to an input end of the first low-pass filter 32, an output end of the first low-pass filter 32 is connected to a non-inverting input end of the amplifier 33, an inverting input end of the amplifier 33 is grounded, an output end of the amplifier 33 is connected to an input end of the second low-pass filter 34, and an output end of the second low-pass filter 34 is used for outputting a conditioned analog signal.

In this embodiment, the digital-to-analog conversion chip 31 is MCP4728 of MICROCHIP, which has 4 12-bit analog output channels, and uses IIC communication at a standard rate of 100kbps, and can perform output control on each channel independently, or on 4 channels simultaneously.

When the digital-to-analog conversion chip 31 outputs a signal, noise and unnecessary frequency components are generally superimposed. Therefore, the signal generated by the digital-to-analog conversion chip 31 enters a first low-pass filter 32 for initial filtering, is amplified by an amplifier 33, and is finally smoothed by a second low-pass filter 34 to provide a signal to the outside.

In a preferred embodiment, referring to fig. 4, the switching value input conditioning circuit 4 includes a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, a third capacitor C3, a fourth capacitor C4, and a first diode D1, one end of the fifth resistor R5 is used for inputting a switching signal, the other end of the fifth resistor R5 is connected to one end of the third capacitor C3, one end of the sixth resistor R6, and a negative electrode of the first diode D1, an anode of the first diode D1 is connected to one end of the seventh resistor R7, one end of the fourth capacitor C4, and one pin IO of the single chip microcomputer, the other end of the third capacitor C3, the other end of the sixth resistor R6, and the other end of the fourth capacitor C4 are all grounded, and the other end of the seventh resistor R7 is connected to a power supply.

In this embodiment, the external switch signal passes through a low-pass filter formed by the fifth resistor R5 and the third capacitor C3 to filter out high-frequency interference, and is divided by a voltage dividing circuit formed by the fifth resistor R5 and the sixth resistor R6, when a power ground (low level) is input, the first diode D1 is turned on, and a pin of the single chip receives a low level signal; when the input is a power supply (high level), the first diode D1 is cut off, and the pin of the single chip receives a high level signal.

In a preferred embodiment, the switching output power driving circuit 5 includes a power driving chip, an input terminal of the power driving chip is connected to an IO pin of the single chip, and an output terminal of the power driving chip is used for outputting a signal.

In this embodiment, the power driver chip is a BTS724G of Infineon, which has 4 switching channels, each of which can be controlled independently, the internal resistance of the single channel is as low as 90m Ω, the current is as high as 3.3A, and the on-off time is microsecond. And the peripheral configuration circuit is simple. In specific implementation, the digital signal output by the single chip microcomputer is not easy to be directly connected with the driving circuit, so that in the embodiment, a power driving chip is added in the middle to perform primary level conversion, so that a buffering effect can be achieved, and external high-frequency interference is isolated; secondly, the driving capability of the single-path output signal can be increased, and the burden of the singlechip is reduced. In a preferred embodiment, a resistor is added at the output end of the power driving chip, and the resistor can play a role of pulling down the resistor under the condition that the pin level of the single chip microcomputer is not fixed at the moment of power-on, so as to output a stable low-level signal to the outside.

In a preferred embodiment, the PWM output signal power driving circuit 6 includes a PWM driving chip, an input terminal of the PWM driving chip is connected to an IO pin of the single chip, and an output terminal of the PWM driving chip outputs a driving signal to the target component.

In the embodiment, two PWM driving chips can be adopted, one of the two PWM driving chips adopts BTS3028SDR of Infineon company, the chip is a single channel, has internal resistance of 28m omega, can reach a load current of 5A, and can directly drive components such as a hydrogen regulating valve and the like; the TLP521-4 adopting TOSHIBA company has 4 channels, each channel can be independently controlled, but the channel current is only 10mA, and the TLP is applied to occasions needing PWM signals and not needing driving capability, such as components of variable frequency fans and the like.

In a preferred embodiment, please continue to refer to fig. 1, the communication circuit 7 includes a plurality of CAN communication circuits 71 and a plurality of RS485 communication circuits 72, and the plurality of CAN communication circuits 71 and the plurality of RS485 communication circuits 72 are all connected to the single chip microcomputer. In this embodiment, the number of the CAN communication circuits 71 is 4, and the number of the RS485 communication circuits 72 is 1, and the CAN communication and the RS485 communication are respectively implemented.

In a preferred embodiment, the CAN communication circuit 71 includes a CAN communication chip, and the CAN communication chip is connected to the communication interface of the single chip microcomputer and is used for realizing CAN communication between the single chip microcomputer and external devices. In specific implementation, the CAN communication chip adopts a TJA1040T chip. The chip rate can reach 1Mbps at most, and the maximum extensible nodes are 110. Two capacitors are connected in parallel between the CANH pin and the CAHL pin and the ground, so that high-frequency interference on the bus can be filtered, and certain electromagnetic radiation resistance is achieved. In addition, a TVS tube is connected between the input ends of the two CAN buses and the ground, so that the device CAN play a role in protection when transient interference occurs between the two input ends and the ground, and has higher anti-interference performance.

In a preferred embodiment, the RS485 communication circuit 72 includes an RS485 communication chip, and the RS485 communication chip is connected to the communication interface of the single chip microcomputer, and is used to implement 485 communication between the single chip microcomputer and an external device. In specific implementation, the RS485 communication chip adopts a MAX485CSA chip. The chip has the highest speed up to 250kbps and the maximum expandable node number of 32. Two capacitors are connected in parallel between the 485A + and 485A-pins and the ground, so that high-frequency interference on the bus can be filtered, and certain electromagnetic radiation resistance is achieved. In addition, a TVS tube is connected between the input ends of the two 485 buses and the ground, so that the TVS tube can play a role in protection when transient interference occurs between the two input ends and the ground, and has higher anti-interference performance.

In summary, in the controller of the fuel cell power generation device provided by the present invention, the analog input conditioning circuit is configured to measure a current type, a voltage type or a resistance type signal by welding different resistors, without redrawing a circuit board, the switching output power driving circuit is configured to directly drive the external solenoid valve without adding a solenoid valve driving part outside the controller, the PWM output signal power driving circuit is configured to directly drive the external hydrogen regulating valve without adding a regulating valve driving part outside the controller, the control chip is used as a CPU to complete data processing of the entire system, and the controller has the characteristics of short measurement period and good measurement real-time High reliability.

The above-described embodiments of the present invention should not be construed as limiting the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A controller of a fuel cell power generation device is characterized by comprising a control chip, a plurality of analog input conditioning circuits, a plurality of analog output conditioning circuits, a plurality of switching input conditioning circuits, a plurality of switching output power driving circuits, a plurality of PWM output signal power driving circuits and a communication circuit, wherein the plurality of analog input conditioning circuits, the plurality of analog output conditioning circuits, the plurality of switching input conditioning circuits, the plurality of switching output power driving circuits, the plurality of PWM output signal power driving circuits and the communication circuit are all electrically connected with the control chip,

the communication circuit is used for communication.

2. The controller of the fuel cell power plant according to claim 1, wherein the control chip is a single chip microcomputer of MC9S12XEP100 type, the single chip microcomputer is connected to the plurality of analog input conditioning circuits, the plurality of analog output conditioning circuits, the plurality of switching value input conditioning circuits, the plurality of switching value output power driving circuits, and the plurality of PWM output signal power driving circuits through an IO pin, and the single chip microcomputer is further connected to the communication circuit through a plurality of communication interfaces.

3. The controller of the fuel cell power plant according to claim 2, wherein the analog input conditioning circuit includes a first resistor, a second resistor, a third resistor, a fourth resistor, a first capacitor and a second capacitor, one end of the first resistor is connected to the power supply, the other end of the first resistor is connected to one end of the second resistor, one end of the fourth resistor, one end of the first capacitor and the analog signal input terminal, the other end of the second resistor is connected to one end of the third resistor, one end of the second capacitor and one IO pin of the single chip, and the other end of the first capacitor, the other end of the fourth resistor, the other end of the third resistor and the other end of the second capacitor are grounded.

4. The controller of the fuel cell power plant according to claim 2, wherein the analog output conditioning circuit includes a digital-to-analog conversion chip, a first low pass filter, an amplifier and a second low pass filter, an input terminal of the digital-to-analog conversion chip is connected to an IO pin of the single chip microcomputer, an analog signal output terminal of the digital-to-analog conversion chip is connected to an input terminal of the first low pass filter, an output terminal of the first low pass filter is connected to a non-inverting input terminal of the amplifier, an inverting input terminal of the amplifier is grounded, an output terminal of the amplifier is connected to an input terminal of the second low pass filter, and an output terminal of the second low pass filter is used for outputting the conditioned analog signal.

5. The controller for a fuel cell power plant according to claim 2, wherein the switching value input conditioning circuit includes a fifth resistor, a sixth resistor, a seventh resistor, a third capacitor, a fourth capacitor, and a first diode, one end of the fifth resistor is used for inputting a switching signal, the other end of the fifth resistor is connected to one end of the third capacitor, one end of the sixth resistor, and a cathode of the first diode, an anode of the first diode is connected to one end of the seventh resistor, one end of the fourth capacitor, and an IO pin of the single chip, the other end of the third capacitor, the other end of the sixth resistor, and the other end of the fourth capacitor are all grounded, and the other end of the seventh resistor is connected to the power supply.

6. The controller for a fuel cell power plant according to claim 2, wherein the switching value output power driving circuit comprises a power driving chip, an input terminal of the power driving chip is connected to an IO pin of the single chip, and an output terminal of the power driving chip is configured to output a signal.

7. The controller for a fuel cell power plant according to claim 2, wherein the PWM output signal power driver circuit comprises a PWM driver chip, an input terminal of the PWM driver chip is connected to an IO pin of the single-chip microcomputer, and an output terminal of the PWM driver chip outputs the driving signal to the target component.

8. The controller for a fuel cell power plant according to claim 2, wherein the communication circuit includes a plurality of CAN communication circuits and a plurality of RS485 communication circuits, and the plurality of CAN communication circuits and the plurality of RS485 communication circuits are connected to the single chip microcomputer.

9. The controller for a fuel cell power plant according to claim 8, wherein the CAN communication circuit includes a CAN communication chip, and the CAN communication chip is connected to the communication interface of the single chip microcomputer, for realizing CAN communication between the single chip microcomputer and an external device.

10. The controller of the fuel cell power plant according to claim 8, wherein the RS485 communication circuit comprises an RS485 communication chip, and the RS485 communication chip is connected with the communication interface of the single chip microcomputer, so as to realize 485 communication between the single chip microcomputer and external equipment.