5results about How to "Reduce hydrogen concentration" patented technology

This invention relates to the field of hydrogen embrittlement resistant workpieces, and provides a workpiece utilizing pores to resist hydrogen embrittlement and its preparation method. The preparation method includes a workpiece forming step: forming the workpiece and making the surface and / or interior of the workpiece have pores that act as hydrogen traps. The surface and / or interior of the workpiece have pores that act as hydrogen traps. The workpiece and its preparation method provided by this invention utilize pores to resist hydrogen embrittlement, by pre-setting pores within the workpiece as hydrogen traps. The pores that exist inside the workpiece beforehand have a higher binding energy with hydrogen, so hydrogen will preferentially diffuse into the internal pores during diffusion, thereby reducing the hydrogen concentration inside the workpiece and effectively alleviating hydrogen embrittlement. It does not require the addition of specific microalloying elements to improve the material's resistance to hydrogen embrittlement, and it does not need to consider the compatibility of the added elements with the material matrix, thus not being limited to one or a few fixed materials, greatly reducing application costs and having broad promotion and application value.

The invention discloses a gasified hydrogen recovery and pressure relief coupling system for liquid hydrogen storage. The secondary heat exchanger and the primary heat exchanger are respectively provided with a cold side inlet, a cold side outlet, a hot side inlet and a hot side outlet; a hydrogen and air inlet and a tail gas outlet are formed in the auxiliary power device; a hydrogen and diluent gas inlet and a mixed gas outlet are formed in the mixed gas cylinder; a first liquid hydrogen pump in the liquid hydrogen storage tank is connected with the power device through a first one-way valve; a gas hydrogen outlet of the liquid hydrogen storage tank is connected with a hydrogen inlet of the mixed gas cylinder and an inlet of the hydrogen compressor, an outlet of the hydrogen compressor is connected with a cold side inlet of the secondary heat exchanger, and a cold side outlet of the secondary heat exchanger is connected with a hydrogen inlet of the auxiliary power device. An outlet of the air compressor is connected with a cold side inlet of the primary heat exchanger, and a cold side outlet of the primary heat exchanger is connected with an air inlet of the auxiliary power device. According to the liquid hydrogen storage tank, the situation that evaporation gas hydrogen in the liquid hydrogen storage tank is directly discharged to cause aircraft energy waste can be avoided, and meanwhile redundant evaporation gas hydrogen can be safely and reliably discharged to the external environment.

A hydrogen generator with hydrogen leakage self-aware function comprises an electrolytic module, an integrated passageway device, a condensate filter, a humidification cup, a housing, an internal hydrogen sensing component, and a monitoring device. The electrolytic module is configured to electrolyze an electrolyzed water to generate a gas comprising hydrogen. The integrated passageway device comprises gas inlet passageway and a gas outlet passageway. The condensate filter is configured for filtering the gas comprising hydrogen. The humidification cup is configured for humidifying the gas comprising hydrogen. The gas comprising hydrogen flows through the condensate filter and the humidification cup by the way of the integrated passageway device. The internal hydrogen sensing component is configured in the housing for sensing the hydrogen concentration in the housing to generate an internal sensing result. The monitoring device is coupled to the internal hydrogen sensing component. The monitoring device controls the operation of the hydrogen generator according to the internal sensing result to avoid the hydrogen generator from the problem caused by hydrogen.

This invention belongs to the field of automotive manufacturing technology and discloses a hydrogen engine and its control method, as well as a vehicle. The engine includes a crankcase ventilation system, a hydrogen scavenging system, and an ECU. An air filter is installed in the engine intake pipe. The crankcase injection pipe is connected to the engine intake pipe and the crankcase. Both a low-load outlet branch and a high-load outlet branch are connected in parallel to the crankcase outlet pipe and the engine intake pipe. A vacuum pump is installed on the high-load outlet branch. Hydrogen concentration sensors are respectively installed in the crankcase, on the crankcase outlet pipe, and on the intake manifold. A scavenging pipe is equipped with a scavenging pump and is connected to the hydrogen rail and the intake manifold. The low-load outlet branch is connected to the scavenging pipe. The crankcase ventilation system and the hydrogen scavenging system are electrically connected to the ECU. This invention monitors the engine hydrogen concentration. The vacuum pump delivers hydrogen from the crankcase and pipes into the cylinders for combustion. When the engine is stopped, it effectively scavenges and burns the hydrogen in the hydrogen rail, improving engine safety.

The application discloses a hydrogen removal unit for a battery, a preparation method of the hydrogen removal unit and an aluminum shell battery, and relates to the technical field of sodium battery safety. The hydrogen removal unit is used for being integrated on the inner side of a battery cover plate pressure relief valve. In a normal state, trace hydrogen is adsorbed by a physical adsorption material in a physical adsorption section. When thermal runaway occurs, the hydrogen is forced to flow through an irreversible catalytic hydrogenation reaction of a chemical hydrogen fixation section by using the heat and pressure of high-temperature gas, so that the hydrogen concentration is greatly reduced, and then the battery cell is discharged, thereby reducing the risk of combustion and explosion of the outflow gas from the source.