Temperature control method and system for fuel cell stack

By combining feedforward control and PID fuzzy control, the target temperature of the fuel cell stack is determined using the volt-ampere characteristic curve, and the heat dissipation and heating equipment are dynamically adjusted, which solves the problem of difficult to balance the temperature control accuracy and response time in the prior art, and achieves a more stable temperature control effect.

CN119725632APending Publication Date: 2025-03-28ENERGY RES INST OF SHANDONG ACAD OF SCI
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Patent Information

Application Number
CN202411647185.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-18
Publication Date
2025-03-28

AI Technical Summary

Technical Problem

The existing fuel cell temperature control process is difficult to balance between control accuracy and system response, resulting in large temperature fluctuations and affecting battery performance.

Method used

The method of combining feedforward control and PID fuzzy control is adopted to determine the target temperature of the stack through the volt-ampere characteristic curve, and the working status of the heat dissipation equipment and heating equipment is dynamically adjusted according to the temperature difference of the inlet and outlet of the coolant to achieve adaptive temperature control.

Benefits of technology

It effectively shortens the system response time, reduces control errors, avoids large temperature fluctuations, and improves the flexibility, energy saving and reliability of the system.

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Abstract

The invention relates to a temperature control method and system for a fuel cell stack, and the method comprises the steps: determining corresponding stack target temperatures under different current values according to a volt-ampere characteristic curve of a controlled stack, and taking the stack target temperatures as corresponding starting temperatures Tref; after the controlled galvanic pile is started, heating and circulating equipment is controlled to enable the pile outlet temperature Tout to rise to the galvanic pile starting temperature Tref according to the size relation between the cooling liquid pile outlet temperature Tout and the starting temperature Tref under the corresponding current; if the current pile outlet temperature Tout is between the starting temperature Tref and the pile inlet temperature Tin, continuing to judge whether the pile inlet and outlet temperature difference is within a set range; otherwise, controlling the working states of heat dissipation equipment and circulation equipment in the cooling liquid circulation loop, and carrying out heat dissipation on the controlled galvanic pile at the maximum power; if the in-pile and out-pile temperature difference is within a set range, maintaining the current state of the electric pile; and if not, controlling the working states of a heat dissipation device and a circulation device in the cooling liquid circulation loop through feedforward control and PID control, so that the temperature difference in and out of the reactor is recovered to a set range.
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