US 12,460,307 B2
Off-grid electrolysis control method and device thereof independent of grid
Qiang Yan, Halethorpe, MD (US)
Assigned to Micro Hydrogen Inc., Oakland, MD (US)
Filed by Micro Hydrogen Inc., Oakland, MD (US)
Filed on Oct. 3, 2022, as Appl. No. 17/959,296.
Application 17/959,296 is a continuation of application No. PCT/CN2021/000042, filed on Mar. 15, 2021.
Prior Publication US 2023/0043491 A1, Feb. 9, 2023
Int. Cl. C25B 9/65 (2021.01); C25B 1/04 (2021.01); C25B 9/70 (2021.01); C25B 15/02 (2021.01)
CPC C25B 9/65 (2021.01) [C25B 1/04 (2013.01); C25B 9/70 (2021.01); C25B 15/02 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A device for electrolysis, comprising
a power supply for supplying power to electrolysis, wherein the power supply is a fluctuating power supply, wherein the fluctuating power supply is characterized by a minimum cut-in voltage with a corresponding minimum cut-in current and a corresponding power,
an electrolyzer system, wherein the electrolyzer system comprises a basic electrolyzer and a number of controllable parallel electrolyzers, the basic electrolyzer comprises a group of basic electrodes connected in series and a number of controllable series electrodes, each of the controllable parallel electrolyzers comprises the same number of the basic electrodes connected in series and the same number of the controllable series electrodes as the basic electrolyzer, and each of the electrodes is preset with a reference voltage and a corresponding base reference current and a maximum reference current,
a controller, wherein the controller detects the voltage and current of the electrolyzer system and the fluctuating power supply, controls each of the controllable series electrodes being connected or cutting out in series, and controls each of the controllable parallel electrolyzers being connected or cutting out in parallel according to power fluctuation,
wherein the number of the basic electrodes in the basic electrolyzer is set according to the minimum cut-in voltage of the fluctuating power supply and the reference voltage of the electrodes,
a size of the basic electrolyzer is set according to a ratio of the minimum cut-in current of the fluctuating power supply Ii over the basic reference current of the basic electrodes and the controllable series electrodes Ib as Ii/Ib, and
each of the controllable series electrodes is connected to or cut off from the basic electrolyzer by the controller in response to voltage change in the fluctuating power supply of the power source to maintain working voltage in the electrodes at about the same as the reference voltage, and
each of the controllable parallel electrolyzers is connected in parallel to or cut off from the electrolyzer system by the controller when working current in the electrodes exceeds the maximum reference current.