4results about How to "Prevent passage" patented technology

The utility model provides a battery safety valve and a lead-acid storage battery, and belongs to the technical field of storage battery safety valves, the battery safety valve comprises a valve seat, an exhaust valve body is arranged in the valve seat, and a gas channel is arranged in the exhaust valve body; convex ribs are arranged on the inner wall surface of the peripheral wall part; the rubber cap is arranged at the air outlet end of the exhaust valve body in a sleeving mode, the top cover part is located at a port of the air outlet end of the exhaust valve body, the peripheral wall part surrounds the exhaust valve body, the protruding ribs make linear contact with the outer wall face of the exhaust valve body, and a gap is reserved between the inner wall face of the peripheral wall part and the outer wall face of the exhaust valve body. The safety valve has the beneficial effects that the inner wall surface of the rubber cap and the outer wall surface of the exhaust valve body are attached and sealed in a linear contact manner, so that the contact area between the rubber cap and the exhaust valve body is reduced, the safety valve is easier to open when the internal pressure of a battery is increased, and the sensitivity of the safety valve is improved; and the difference value between the opening threshold value and the closing threshold value is reduced.

The utility model discloses an anti-leakage double-layer water inlet pipe assembly, which relates to the technical field of water pipes and comprises an inner hose, one end of the inner hose is connected with a water outlet connector, the other end of the inner hose is connected with a water inlet connector, the water outlet connector and the water inlet connector are respectively provided with a butt-joint threaded cap, and the outer side of the inner hose is sleeved with an outer corrugated pipe. A one-way valve assembly is arranged in the water inlet connector and comprises a one-way valve body fixedly installed in the water inlet connector, a holder is fixedly installed at one end of the one-way valve body, a positioning shaft is installed on the holder in a sliding mode, the positioning shaft is sleeved with a reset spring, and a sealing plug is fixedly installed at the tail end of the positioning shaft. A blocking mechanism is mounted on one side of the one-way valve assembly, and a mounting groove is formed in the outer wall of the one-way valve body According to the anti-leakage double-layer water inlet pipe assembly, through cooperative use of the one-way valve assembly and the plugging mechanism, tap water can be prevented from passing through the inner hose when a pipeline is broken, and waste of water resources is reduced.

The application discloses an overcharge-preventing electrolyte additive and application thereof in a sodium ion battery, and relates to the technical field of sodium ion batteries. The specific steps comprise the following steps: a conventional electrolyte with a sodium salt concentration of 0.7-1.4 M is prepared, two or more than two of electrolytes EC, PC and EMC are selected and prepared, and the prepared electrolyte is named as a basic electrolyte; different concentrations of overcharge-preventing electrolyte additives A and additives B are added into the basic electrolyte as electrolyte additives, and sodium ion battery electrolytes containing different concentrations of additives are prepared. The method effectively improves the safety and electrochemical performance of the sodium ion battery.

The present disclosure relates to an oil filtering material, a preparation method and application thereof, and the raw materials of the oil filtering material include, in terms of mass percentage, 30-60% of water-absorbing material, 30-60% of thermoplastic elastomer material, 5-10% of compatibilizer and 1-5% of inorganic filler. The preparation method includes: mixing a certain proportion of the water-absorbing material, the thermoplastic elastomer material, the compatibilizer and the inorganic filler to obtain a mixture; plasticizing the mixture to obtain a melt; vulcanizing the melt to obtain a vulcanizate; crushing the vulcanizate to obtain a water-absorbing swelling material; uniformly laying the water-absorbing swelling material on a porous material and performing hot-pressing compounding to obtain the oil filtering material. The oil filtering material, the preparation method and application thereof have low cost, simple preparation process, and can improve the filtering effect of oil, especially vehicle ethanol gasoline, and prolong the service life of the oil filtering material.