Abstract: A method and device of controlling a drain valve of a fuel cell, a controller, a fuel cell system, and a medium is disclosed. The method includes (i) acquiring a permeate water mass flow rate from a cathode to an anode of the fuel cell system and a separation efficiency of a water-gas separator in the fuel cell system, (ii) determining a water mass flow rate level of water passing through a hydrogen circulating pump based on a drive current of the hydrogen circulating pump in the fuel cell system, (iii) determining a circulating water mass flow rate passing through the hydrogen circulating pump based on the permeate water mass flow rate, the separation efficiency, and the water mass flow rate level, and (iv) controlling the drain valve in the fuel cell system based on the circulating water mass flow rate.

Abstract: A system for a real time programming of a battery agnostic Battery Management System (BMS) including a processor of a BMS programming server node connected to a controller over a network and configured to host a machine learning (ML) module and a memory on which are stored machine-readable instructions that when executed by the processor, cause the processor to: receive sensory data from a sensor array attached to a battery module having a BMS coupled to the controller; parse the sensory data to derive a plurality of features; query a local BMS database to retrieve local historical BMS data collected from the battery module; generate a feature vector based on the plurality of features and the historical BMS data; and provide the feature vector to the ML module for generating a predictive model configured to output a BMS programming parameter for re-programming of the BMS.

Abstract: A method for controlling a fuel cell system includes (i) performing a low-temperature start-up process of the fuel cell system, (ii) monitoring internal resistance of a fuel cell stack in the fuel cell system, and (iii) determining that the low-temperature start-up process of the fuel cell system is abnormal based on the appearance of an inflection point in the internal resistance of the monitored fuel cell stack.

Abstract: A backlit touch button assembly includes a circuit board, one or more light sources, a reflecting plate, and a marked strip. The light sources are positioned on the circuit board. The reflecting plate and the marked strip are attached to opposite sides of the circuit board. The reflecting plate defines one or more optical grooves receiving the light sources. Each optical groove has a reflecting portion. The circuit board defines one or more through holes adjacent to the light sources and corresponding to the reflecting portion of the optical grooves. The reflecting portion has a first reflecting surface, a second reflecting surface, and a third reflecting surface. The first reflecting surface and the third reflecting surface meet the second reflecting surface, respectively, at an angle.

Abstract: An exemplary display device includes a display panel and a rotating apparatus. The rotating apparatus includes a first spindle assembly, a conveyor connecting to the first spindle assembly, and a second spindle assembly. The first spindle assembly includes a first spindle configured to synchronously rotate with rotation of the display panel. The second spindle assembly includes a second spindle meshed with the first spindle, and is configured to be able to rotate and simultaneously rise or fall along the connecting assembly.

Abstract: An exemplary display device includes a display panel and a rotating apparatus. The rotating apparatus includes a first spindle assembly, a conveyor connecting to the first spindle assembly, and a second spindle assembly. The first spindle assembly includes a first spindle configured to synchronously rotate with rotation of the display panel. The second spindle assembly includes a second spindle meshed with the first spindle, and is configured to be able to rotate and simultaneously rise or fall along the connecting assembly.