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A control system and control method for fuel battery

A fuel cell and control system technology, applied in the direction of fuel cell control, fuel cell, fuel cell additives, etc., can solve the problems of implementing complex functions and increasing the cost of PEM fuel cell controllers, and achieve cost reduction, simplified structure and control Algorithms, the effect of extending the service life

Active Publication Date: 2008-03-19
BYD CO LTD
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Problems solved by technology

The control system ensures that the fuel cell has high performance at each power point, but the closed-loop control method makes it difficult to establish the mathematical model of the PEM fuel cell control system and complicates the composition of the PEM fuel cell control system, and a large number of fuzzy control systems are used. , neural network identification and other modern control theories to build an ideal PEM fuel cell control system, and the sub-actuators of each parameter work together to realize complex functions, which also greatly increases the cost of the PEM fuel cell controller

Method used

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  • A control system and control method for fuel battery
  • A control system and control method for fuel battery
  • A control system and control method for fuel battery

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specific Embodiment 1

[0034] Specific Embodiment 1. Based on the above-mentioned research results, the control system of this embodiment is shown in Figure 2. It includes a fuel cell control unit 101 composed of a microprocessor, a storage unit 102 for storing operating parameters, and a temperature control implementation Mechanism 103, humidity control actuator 104, pressure control actuator 105, flow control actuator 106, measurement unit 108 and power adjustment unit. When the fuel cell is inspected as a finished product, the output characteristics of the fuel cell are divided into several continuous power intervals, and each power interval (that is, the maximum value and minimum value of the interval power) and the preferred power corresponding to the power interval The power point and the setting values ​​of a series of main working parameters of the control system corresponding to the preferred power point are stored in the storage unit of the control system. Usually, the working parameters in...

specific Embodiment 2

[0057] The second embodiment is different from the first embodiment in that the power adjustment unit can also be realized through the solution shown in FIG. 5 .

[0058] The power conditioning unit includes an additional load 209 and an additional load management module 210 , and the additional load 209 is connected in series in the loop composed of the fuel cell 107 and the load 111 to play a role of power consumption. The control unit 101 compares the set optimal power point value with the system load power, and outputs a control signal to the additional load management module 210, so that the additional load management module 210 controls the additional load 209 to reduce the power when the power required by the load is greater than the optimal power point. Consumption, when the power required by the load is less than the preferred power point, control the additional load 209 to increase power consumption, so that the fuel cell 107 works at the set preferred power point.

...

Embodiment 2

[0064] Embodiment 2 further reduces the cost of the fuel cell control system while sacrificing a certain fuel cell power generation efficiency but ensuring the stable operation of the fuel cell.

[0065] The specific embodiment above describes a composition method of a proton exchange membrane fuel cell control system that includes data storage units segmented according to the power level. In actual use, because the size of the fuel cell discharge power can also be characterized by the size of the fuel cell discharge current or the size of the discharge voltage or the impedance of the fuel cell, the present invention can also be characterized by the size of the current, the size of the voltage or the size of the impedance. Carry out segmentation, monitor the corresponding electrical characteristics of the load, and build a segmented fuel cell control system that stabilizes the fuel cell at a certain discharge current point, discharge voltage point, or impedance point.

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Abstract

The invention provides a fuel cell control system which comprises a control unit, at least one parameter control actuator mechanism used to output working parameters of a controlled fuel cell, a measurement unit, a storage unit and a regulating unit. The measurement unit is adapted to connect with a load and monitor the input electricity behavior of the load. The storage unit stores each output electricity behavior of the fuel cell, an optimal electrical behavior of each output electricity behavior and a first working parameter corresponding to the optimal electrical behavior. The control unit is connected with the measurement unit, the storage unit, the parameter control actuator mechanism and the regulating unit individually. The control unit responds the output of the measurement unit, determines the optimal electrical behavior and the first working parameter, controls the fuel cell to work upon the optimal electrical behavior, and outputs control signals to the parameter control actuator mechanism according to the first working parameter. The invention simplifies the control system and control algorithm of the fuel cells, reduces the cost, and ensures the power generation property of the fuel cells.

Description

【Technical field】 [0001] The invention relates to a fuel cell control system, in particular to a proton exchange membrane fuel cell control system, which is used to control the fuel cell operating parameters to ensure the power generation performance of the fuel cell. 【Background technique】 [0002] A fuel cell is a device that generates electricity from a fuel and an oxidant, and can achieve high power generation efficiency. In the fuel cell system, with the polymer electrolyte membrane as the center, an anode (ANODE) ​​and a cathode (CATHODE) are arranged on both sides. Hydrogen as a fuel undergoes an electrochemical reduction reaction at the anode, and oxygen as an oxidant undergoes an electrochemical reduction reaction at the cathode. Oxidation reactions, where electrical energy is generated by movement of generated electrons. [0003] Taking a typical proton exchange membrane fuel cell (PEM fuel cell) as an example, hydrogen is used as fuel. In the anode reaction, hydr...

Claims

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Application Information

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IPC IPC(8): H01M8/00H01M8/10H01M8/04H01M8/04298H01M8/1004
CPCY02E60/521Y02E60/50
Inventor 张振赵志强董俊卿
Owner BYD CO LTD
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