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Fuel cell coolant temperature control method, system and controller thereof

A cooling liquid temperature, fuel cell technology, applied in the direction of fuel cells, fuel cell additives, fuel cell heat exchange, etc., can solve the problems of slow fan startup response speed, control deviation, slow response speed, etc., to shorten the closed-loop control time , The effect of reducing fan loss and reducing control deviation

Pending Publication Date: 2022-05-06
DONGFANG ELECTRIC (CHENGDU) HYDROGEN FUEL CELL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing fuel cell control technology mainly performs closed-loop control for the temperature of the fuel cell, and corrects the control output through the ambient temperature. The disadvantages are slow response speed, slow response speed of fan startup, long reaction time of temperature control, and easy oscillation of temperature closed-loop control. Phenomenon; part of the control technology uses the ambient temperature and heat production power to calculate the cooling air volume, so as to control the temperature. The same target temperature has control deviation; in summary, temperature fluctuations and deviations will affect the water and heat balance inside the fuel cell, thereby affecting the performance, stability and life of the fuel cell

Method used

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  • Fuel cell coolant temperature control method, system and controller thereof
  • Fuel cell coolant temperature control method, system and controller thereof

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Embodiment 1

[0033] This embodiment provides a method for controlling the temperature of the fuel cell coolant, setting the corresponding temperature difference setting value according to different dispatching currents, and starting the fan control strategy; ) Calculate the initial duty cycle of the fan. On the basis of the initial duty cycle of the fan, the closed-loop control is used to obtain the duty cycle of the fan, which shortens the closed-loop control time and reduces the control deviation; Work within the maximum efficiency range to reduce fan loss and avoid noise caused by large fan duty ratios; during fan switching, consider the fan startup delay, and calculate the duty cycle according to the original number of fans before reaching the fan delay. After the fan is delayed, the duty cycle is calculated according to the number of new fans to prevent the temperature overshoot caused by the fan startup delay.

[0034] like figure 1 As shown, the fuel cell cooling liquid temperature...

Embodiment 2

[0044] This embodiment provides a fuel cell coolant temperature controller, including:

[0045] The acquisition module is used to collect the real-time temperature value of the fuel cell stack coolant outlet, the output current and output voltage of the stack, and collect the ambient temperature; find the target value temperature of the coolant outlet, the temperature difference setting value and the initial number of fans according to the scheduling current ;

[0046] The judging module is used to judge whether the difference between the target temperature value of the coolant outlet and the real-time temperature value of the coolant outlet is less than the set value of the temperature difference, if it is greater than or equal to the set value of the temperature difference, then transfer to the acquisition module; Then start the fan control strategy and go to the computing module;

[0047] The calculation module is used to calculate the heat production power of the stack ac...

Embodiment 3

[0052] This embodiment is based on the controller provided in Embodiment 2:

[0053] This embodiment provides a fuel cell coolant temperature control system, such as figure 2 As shown, it includes a fuel cell 1, a water pump 2, a supplementary water tank 3, m radiators 4, m·n fans 5, a controller 6, an ambient temperature sensor 7, a coolant temperature sensor 8, a current sensor 9 and a voltage sensor 10 , where m, n≥2, the fuel cell 1 is connected to the radiator 4 through pipelines, and the radiators 4 dissipate heat in parallel. Each radiator 4 has n groups of fans 5 on it, and the radiator 4 is connected to the water pump 2 through pipelines , the outlet of the water pump 2 is connected with the inlet of the fuel cell 1 to form a whole cooling circuit; the ambient temperature sensor 7 is installed near the air inlet of the fan 5, the coolant temperature sensor 8 is installed at the coolant outlet of the fuel cell 1, and the current sensor 9 and the voltage sensor 10 are ...

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Abstract

The invention discloses a fuel cell cooling liquid temperature control method and system and a controller thereof, and the temperature control method comprises the steps: collecting the real-time temperature value and other data of a fuel cell stack cooling liquid outlet, and searching the target value temperature of the cooling liquid outlet, a temperature difference set value and the number of initial fans according to a scheduling current; whether the difference between the cooling liquid outlet target temperature value and the real-time temperature value is smaller than a temperature difference set value or not is judged, if yes, a fan control strategy is started, the fan duty ratio is calculated, then whether the fan duty ratio is larger than or equal to the minimum set duty ratio and smaller than or equal to the maximum set duty ratio or not is judged, and if yes, the fan duty ratio is directly output to control the fan rotating speed; if the duty ratio is smaller than the minimum set duty ratio, the number of fans is reduced, and the fan duty ratio is calculated for controlling the fan rotating speed; and if the duty ratio is larger than the maximum set duty ratio, the number of the fans is increased, and the fan duty ratio is calculated for controlling the fan rotating speed by considering the fan starting delay. The invention can meet the requirements of fuel cell efficiency and service life.

Description

technical field [0001] The present invention relates to the technical field of fuel cells, and in particular, to a method, a system and a controller for controlling the temperature of a cooling liquid of a fuel cell. Background technique [0002] For different membrane electrodes, fuel cells need to select appropriate temperature operating points at different current scheduling points, and improve the performance, stability and life of fuel cells through refined hydrothermal management. The existing fuel cell control technology mainly performs closed-loop control for the temperature of the fuel cell, and corrects the control output according to the ambient temperature. The disadvantages are that the response speed is slow, the response speed of the fan startup is slow, the temperature control reaction time is long, and the temperature closed-loop control is prone to oscillations, etc. phenomenon; part of the control technology uses the ambient temperature and heat production...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/04537H01M8/04014H01M8/04029H01M8/04701
CPCH01M8/04723H01M8/04014H01M8/04029H01M8/04552H01M8/04582
Inventor 唐刚练勇余漆胡军谢光有
Owner DONGFANG ELECTRIC (CHENGDU) HYDROGEN FUEL CELL TECH CO LTD
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