Device for diagnosing valve failure of fuel cell system
US-2024347748-A1 · Oct 17, 2024 · US
Controller for estimating relative humidity and condensed water, and method for controlling condensed water drain using the same
US11264628B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11264628-B2 |
| Application number | US-201916537039-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 9, 2019 |
| Priority date | Dec 9, 2010 |
| Publication date | Mar 1, 2022 |
| Grant date | Mar 1, 2022 |
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- Title
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Abstract
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The present invention provides a relative humidity and condensed water estimator for a fuel cell and a method for controlling condensed water drain using the same. Here, the relative humidity and condensed water estimator is utilized in control of the fuel cell system involving control of anode condensed water drain by outputting at least two of signals comprising air-side relative humidity, hydrogen-side relative humidity, air-side instantaneous or cumulative condensed water, hydrogen-side instantaneous or cumulative condensed water, instantaneous and cumulative condensed water of the humidifier, membrane water contents, catalyst layer oxygen partial pressure, catalyst layer hydrogen partial pressure, stack or cell voltage, air-side catalyst layer relative humidity, hydrogen-side catalyst layer relative humidity, oxygen supercharging ratio, hydrogen supercharging ratio, residual water in a stack, and residual water in a humidifier.
First claim
Opening claim text (preview).
What is claimed is: 1. A method for controlling condensed water drain using a relative humidity and condensed water estimator for a fuel cell, the method comprising: calculating a residual amount of condensed water based on a water balance equation in an anode condensed water collector; determining as a warning stage of a condensed water level sensor if the residual amount of condensed water is equal to or smaller than 0, and a duration thereof is greater than a reference value (t5); determining as a failure of the condensed water level sensor if a calculated hydrogen utilization rate is smaller than a value obtained by subtracting a hydrogen utilization rate acceptable reference value from a normal hydrogen utilization rate map, or if a hydrogen leakage sensor is on and a duration of an on-state of the hydrogen leakage sensor is greater than a reference value (t6); and if the failure has been determined, performing a control of a condensed water drain valve based on an anode water trap (AWT) estimated value. 2. The method of claim 1 , wherein the residual amount of condensed water is calculated by the following equation: Residual condensed water [ kg ] = ∑ t = 0 t = ∞ [ AWT - ( Anode condensed water drain valve on ) × ( condensed water outflow per second ) ] × Δ t + Residual condensed water initial value . 3. The method of claim 1 , wherein the normal hydrogen utilization rate map utilizes a stack current-based hydrogen utilization rate test map, and the calculated hydrogen utilization rate is calculated by following equation: Calculated hydrogen utilization [ % ] = [ ∑ t = 0 t = T [ ( stack current × stack number × 0.002 ) ÷
Assignees
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Classifications
Humidity; Ambient humidity; Water content · CPC title
of fuel cell exhausts · CPC title
of the coolant · CPC title
Means for solving freezing problems · CPC title
Fuel cells · CPC title
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- What does patent US11264628B2 cover?
- The present invention provides a relative humidity and condensed water estimator for a fuel cell and a method for controlling condensed water drain using the same. Here, the relative humidity and condensed water estimator is utilized in control of the fuel cell system involving control of anode condensed water drain by outputting at least two of signals comprising air-side relative humidity, hy…
- Who is the assignee on this patent?
- Hyundai Motor Co Ltd, Kia Motors Corp
- What technology area does this patent fall under?
- Primary CPC classification H01M8/04156. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Mar 01 2022 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). 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).