Fuel cell shutdown activation method, fuel cell engine and vehicle
By using a supercapacitor to activate the hydrogen pump when the fuel cell is shut down, the problem of online activation of the fuel cell in the existing technology requiring startup is solved, and fast and low-cost fuel cell activation is achieved, which improves the performance of the fuel cell stack and extends its service life.
CN116053525BActive Publication Date: 2025-09-12BEIJING SINOHYTEC
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Patent Information
- Application Number
- CN202310197839.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-03-03
- Publication Date
- 2025-09-12
- Estimated Expiration
- 2043-03-03
AI Technical Summary
Technical Problem
The existing fuel cell online activation solution requires starting the fuel cell, which cannot meet the needs of vehicle applications and has high activation costs.
Method used
A supercapacitor is used as an external constant current source. After the fuel cell is shut down, it is activated by a hydrogen pump. The supercapacitor is used to control the current density of the stack for activation, including the setting of the anode hydrogen pressure and flow and the maintenance of the current density to complete the activation of the fuel cell.
Benefits of technology
It achieves fast and low-cost fuel cell activation in the shutdown state, improves membrane wetting, activates catalyst activity, extends the storage time of the fuel cell stack, and reduces activation costs.
✦ Generated by Eureka AI based on patent content.
Abstract
The present invention provides a fuel cell shutdown activation method, a fuel cell engine, and a vehicle. In the fuel cell shutdown activation method, the fuel cell activation device includes a fuel cell system and a supercapacitor, the supercapacitor's negative electrode electrically connected to the fuel cell stack's cathode, and the supercapacitor's positive electrode electrically connected to the fuel cell stack's anode. The method comprises: after the fuel cell is shut down, setting the fuel cell system to a set state so that the fuel cell anode hydrogen pressure and flow rate reach set parameters; after reaching the set parameters, controlling the stack current density to maintain a set value via the supercapacitor; and when the set conditions are met, stopping the supercapacitor discharge to complete activation. By using the supercapacitor as an external constant current source, hydrogen pump activation is performed after the fuel cell system is shut down, resulting in a short activation time and low cost, making it easy to implement in vehicle applications.
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