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Fuel Cell System, Fuel Cell Vehicle, and Control Method for Fuel Cell System
US2016133965A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2016133965-A1 |
| Application number | US-201514936908-A |
| Country | US |
| Kind code | A1 |
| Filing date | Nov 10, 2015 |
| Priority date | Nov 12, 2014 |
| Publication date | May 12, 2016 |
| Grant date | — |
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- Title
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Abstract
Official abstract text for this publication.
A fuel cell system includes: a power supply circuit including a fuel cell and a secondary battery; an oxidant gas supply flow passage; a pump; and a control unit configured to drive the pump and dilute hydrogen retained in an cathode. The control unit is configured to stop supplying an oxidant gas to the cathode by stopping an operation of the pump such that dilution of the hydrogen retained in the cathode is stopped, while the fuel cell vehicle remains stationary after a starter switch of the fuel cell vehicle is switched from an off state to an on state, or while a load required of the power supply circuit remains smaller than a predetermined value after the starter switch of the fuel cell vehicle is switched from the off state to the on state.
First claim
Opening claim text (preview).
What is claimed is: 1 . A fuel cell system used in a fuel cell vehicle, comprising: a power supply circuit including a fuel cell and a secondary battery; an oxidant gas supply flow passage used to supply an oxidant gas to a cathode of the fuel cell; a pump that compresses the oxidant gas and supplies the compressed oxidant gas to the cathode, the pump being provided in the oxidant gas supply flow passage; and a control unit configured to drive the pump and dilute hydrogen retained in the cathode, wherein the control unit is configured to stop supplying the oxidant gas to the cathode by stopping an operation of the pump such that dilution of the hydrogen retained in the cathode is stopped, while the fuel cell vehicle remains stationary after a starter switch of the fuel cell vehicle is switched from an off state to an on state, or while a load required of the power supply circuit remains smaller than a predetermined value after the starter switch of the fuel cell vehicle is switched from the off state to the on state. 2 . The fuel cell system according to claim 1 , wherein the control unit is configured to supply the oxidant gas to the cathode such that the hydrogen retained in the cathode is diluted and discharged from the cathode, when a predetermined time elapses after the starter switch of the fuel cell vehicle is switched from the off state to the on state, even when the fuel cell vehicle has not yet started to travel. 3 . The fuel cell system according to claim 1 , wherein the control unit is configured to supply the oxidant gas to the cathode such that the hydrogen retained in the cathode is diluted and discharged from the cathode, when a load demand is issued to the power supply circuit after the starter switch of the fuel cell vehicle is switched from the off state to the on state, even when the fuel cell vehicle has not yet started to travel. 4 . A fuel cell vehicle characterized by comprising the fuel cell system according to claim 1 . 5 . A control method for a fuel cell system used in a fuel cell vehicle, the fuel cell system including: a power supply circuit including a fuel cell and a secondary battery; an oxidant gas supply flow passage used to supply an oxidant gas to a cathode of the fuel cell; a pump that compresses the oxidant gas and supplies the compressed oxidant gas to the cathode, the pump being provided in the oxidant gas supply flow passage; and a control unit configured to drive the pump and dilute hydrogen retained in the cathode, the control method comprising stopping supplying the oxidant gas to the cathode by stopping an operation of the pump such that dilution of the hydrogen retained in the cathode is stopped, while the fuel cell vehicle remains stationary after a starter switch of the fuel cell vehicle is switched from an off state to an on state, or while a load required of the power supply circuit remains smaller than a predetermined value after the starter switch of the fuel cell vehicle is switched from the off state to the on state.
Assignees
Inventors
Classifications
Operations & Transport · mapped topic
at auxiliary devices, e.g. reformer, compressor, burner · CPC title
Operations & Transport · mapped topic
Operations & Transport · mapped topic
Fuel cells in motive systems, e.g. vehicle, ship, plane · CPC title
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Frequently asked questions
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- What does patent US2016133965A1 cover?
- A fuel cell system includes: a power supply circuit including a fuel cell and a secondary battery; an oxidant gas supply flow passage; a pump; and a control unit configured to drive the pump and dilute hydrogen retained in an cathode. The control unit is configured to stop supplying an oxidant gas to the cathode by stopping an operation of the pump such that dilution of the hydrogen retained in…
- Who is the assignee on this patent?
- Toyota Motor Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification H01M8/04201. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Thu May 12 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).