Self-breathing fuel cell temperature control method based on multiple internal models

A temperature control method and fuel cell technology, applied in the direction of fuel cell control, fuel cells, fuel cell additives, etc., can solve problems such as failure to guarantee the output performance and life of the stack, failure to achieve temperature follow-up control, and fuel cell oxygen starvation , to achieve good dynamic tracking performance, good control effect, and temperature control to avoid the effect

CN113161587AActive Publication Date: 2021-07-23绍兴学森能源科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2021-07-23

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Abstract

The invention discloses a self-breathing fuel cell temperature control method based on multiple internal models. The method considers the nonlinear characteristics of a fuel cell system, adopts a system nominal model combination under multiple working conditions to obtain a global nominal model, and can realize a good control effect under all working conditions. Meanwhile, accurate temperature following control of the self-breathing fuel cell is achieved, sufficient supply of air needed by reaction of the fuel cell is guaranteed, high steady-state precision and good dynamic tracking performance are achieved, it can be guaranteed that the fuel cell works in a good working state under all current working conditions, good output performance and longer service life are achieved, the rapidity, accuracy and robustness of the control effect are guaranteed by reasonably designing a control strategy, and internal and external disturbance is fully inhibited.
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Description

technical field

[0001] The invention relates to the technical field of fuel cell system control, in particular to a self-breathing fuel cell temperature control method based on multiple internal models. Background technique

[0002] Proton exchange membrane fuel cell is a kind of electrochemical power generation device. According to different cooling methods, it is mainly divided into air-cooled and water-cooled fuel cells. Air-cooled fuel cells have a simpler structure and are suitable for some applications with relatively low power requirements, also known as self-breathing fuel cells. In order to ensure better performance, generally self-breathing fuel cells are equipped with cooling fans. By using cooling fans, the functions of air supply and stack cooling are combined, and an open cathode flow channel is designed to cause The air flow can take away the excess heat generated by the stack, realize effective cooling of the stack, and at the same time realize sufficient ai...

Examples

Embodiment Construction

[0043] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0044] Such as figure 1 A kind of self-breathing fuel cell temperature control method based on multiple internal models shown, comprises the following steps,

[0045] Step 1: By using the M-sequence identification method, such as figure 2 As shown, under each selected working condition, the fan speed n is identified from the test data k to the fuel cell stack temperature T st,k mapping relationship The description formula is,

[0046]

[0047] ΔT st,k =T st -T st,k

[0048] Δn k =n-n k

[0049] In the formula, N is the number of selected working conditions (k=1,...,N), T st,k , n k are the stack temperature and fan speed at the equilibrium point of each working condition, respectively.

[0050]Step 2: Combine the nominal m...