49results about How to "Stop the explosion" patented technology

The invention discloses a thermal insulation cotton and a preparation method thereof, and a battery module using the thermal insulation cotton, wherein the thermal insulation cotton contains a thermalinsulation material and a fire-retardant material, and can be placed between single cells in a battery module. The preparation method of the thermal insulation cotton comprises: mixing a thermal insulation material and a fire-retardant material, adding the obtained mixture to a solvent, adding a proper amount of a binder, stirring to obtain a mixed slurry, and carrying out pressing molding on theslurry to obtain the thermal insulation cotton. Compared to the thermal insulation cotton in the prior art, the thermal insulation cotton of the present invention contains the thermal insulation material and the fire-retardant material so as to simultaneously provide effects of effective thermal insulation and flame retardancy. According to the present invention, the preparation method has advantages of simple steps, low cost and easy mass production; and the thermal insulation cotton can be used in battery modules, can effectively inhibit the spread of the thermal runaway of the battery, canprevent the battery module from catching fire and explosion, and can remarkably improve the safety performance of the battery module.

The invention discloses a lithium ion battery positive plate. The lithium ion battery positive plate comprises a positive current collector and a positive active substance layer distributed on the positive current collector, wherein a heat insulation layer is distributed on the positive active substance layer; the heat insulation layer comprises small hollow heat insulation grains and a binding agent; the ratio of the hollow volumes of the small hollow heat insulation grains to the volumes of the small hollow heat insulation grains is 0.3-0.7. Furthermore, the invention further discloses a lithium ion battery adopting the lithium ion battery positive plate. The lithium ion battery has the ideal safety; when the lithium ion battery has inner short circuit or is overcharged, the small hollow heat insulation grains in the heat insulation layer of the positive plate can effectively prevent heat from being transmitted to the positive plate and causing thermal runaway of the positive plate, and prevent the lithium ion battery from being combusted or exploded.

The invention discloses a composite material battery box, which comprises a lower shell and an upper cover, wherein the lower shell is of a sandwich structure and comprises an outer shell, a reinforcing support and an inner shell which are bonded into a whole through a structural adhesive, a cooling water path layer is laid on the inner bottom surface of the lower shell, a plurality of battery packs are fixed on the cooling water path layer, and two adjacent battery packs are provide with a mica sheet therebetween; the upper cover is formed by compounding multiple layers of materials, the middle layer of the upper cover is a filling material layer, the upper surface and the lower surface of the filling material layer are laminated with a fiber material layer, and the filling material layerand the fiber material layer are adhered and fixed through foamed polyurethane sprayed on the fiber material layer. According to the technical scheme of the invention, the battery box formed by adopting the composite material of various different materials has the advantages of easy forming, good corrosion resistance, good insulation, high temperature resistance, heat insulation, flame retardance, explosion prevention and the like, improves the safety performance of the battery packs, improves the endurance mileage and the stability of the endurance mileage, reduces the mileage anxiety, and is excellent in shock absorption and noise reduction performance.

The invention relates to a fireproof valve capable of realizing automatic and quick close in case of failed electronic installations. The fireproof valve comprises a valve body, a valve core, a valve cover, a valve rod and a valve bracket, wherein the valve core is arranged in the valve body, the top end of the valve core and the valve rod are coaxially fixed together, the valve cover is coaxially arranged on the valve body, the valve bracket is coaxially arranged on the valve cover, an ESFR quick response system is horizontally arranged on the side wall of the valve bracket, the front end of the ESFR quick response system is embedded into the side wall of the valve rod, a closed spring is sleeved on the valve rod in the valve bracket, the side wall at the upper end of the valve rod is provided with a coupling pin hole movably connected with a return mechanism of the valve rod, and the return mechanism of the valve rod is coaxially arranged on the valve bracket. In case of fire accidents, the fireproof valve can realize automatic close, so that the leakage of oil products is quickly cut off; and the valve has the characteristics of high accuracy, high stability, flexible assembly and disassembly, convenient use and the like, and when the valve is arranged on an oil pipeline, the violent spread of fire can be effectively prevented, and the explosive accidents are also avoided.

The invention provides an initiation safety device which comprises a perforation initiation safety device body, an explosion-transferring channel, an anti-explosion piston and an elastic device, wherein the explosion-transferring channel is arranged in the perforation initiation safety device body; the anti-explosion piston is arranged in the perforation initiation safety device body in a movable mode and switches connection and disconnection of the explosion-transferring channel; the elastic device is arranged in the perforation initiation safety device body and is connected with the anti-explosion piston; the moving direction of the anti-explosion piston is not the same as the direction of the explosion-transferring channel. The initiation safety device replaces a safety interlayer gun used in a traditional oil pipe perforation process, construction is simple, perforation cost is saved, the security coefficient is high, and the on-site construction effective rate is high.

An explosion-proof device of flammable gas is prepared for setting air inlet pipe air outlet pipe, top seal cover, bottom seal cover and filtering screen in tank body; and using water as isolation means to have backfire problem avoided effectively.

The invention discloses a transformer fire-protection device applied to a chemical industry park. The device comprises a flat ground, wherein a foundation pit is formed in the upper end face of the flat ground; a protective steel box is placed at the position, below the foundation pit, in the flat ground; a movable base is movably disposed on the upper end face of the protective steel box; a transformer assembly is fixedly installed on the movable base; four protecting bushes are symmetrically and fixedly installed on the bottom of the protective steel box; guide pillars are movably installedin the protecting bushes and upper end parts of the guide pillars are welded with the movable base; and an air cylinder is erected at the middle part of the bottom of the protective steel box in an erected manner. The transformer fire-protection device applied to the chemical industry park disclosed by the invention has the beneficial effects that the movable base is driven by power of the air cylinder to descend and enter the protective steel box; a transformer on the ground is moved downwards into the protective steel box; a sealing cover is closed automatically; the transformer is sealed; fire spreading and explosion caused by fire disasters are prevented; and the device is applicable to different working conditions and brings better use prospect.

The invention discloses a high temperature failure rubber for manufacturing a battery explosion-proof ball. Based on EPDM rubber, multiple additives are added, wherein the additives comprise 0.2-0.5% of carbon black, 0.01-0.10% of paraffinic oil, 0.01-0.10% of stearic acid, 0.10-0.30 of sulphur, 0.01-0.10% of peroxide vulcanizing agent, 0.4-1.0% of promoter and 0.4-1.0% of anti-aging agent. The rubber material can lose efficacy at high temperature and reduce the pressure of a cover cap, thereby achieving the effect of discharging the gas in the battery and further avoiding the explosion of the battery.

The invention discloses a spiral plate-type heat tube flame arrester. The spiral plate-type heat tube flame arrester comprises a fireproof shell and a heat tube, wherein the fireproof shell is in a cylindrical shape, the bottom of the fireproof shell is provided with a base, and the top of the fireproof shell is provided with a cover body; and a spiral plate is arranged in the fireproof shell, thespiral plate is formed by connecting and winding a first metal plate and a second metal plate, a metal box body is formed on a welded part of the first metal plate and the second metal plate, the wound part of the first metal plate is wound outwardly surrounding the metal box body, the wound part of the second metal plate is encircled around the first metal plate by adopting the metal box body asthe center, and a first spiral runner and a second spiral runner are formed between the wound part of the first metal plate and the wound part of the second metal plate. The spiral plate is arrangedin the fireproof shell to form the spiral runner, so that the fireproof space is increased, the wall effect produced by the structural change of a multilayer channel is sufficiently used for sharply reducing the free radicals of the combustion, and the explosion is effectively prevented.

The invention provides a diaphragm for a secondary battery, a preparation method of the diaphragm and the secondary battery. The diaphragm comprises a base film and a flame-retardant layer coated on at least one surface of the base film, the flame-retardant layer is composed of a polyvinylidene fluoride-hexafluoropropylene binder and a flame-retardant capsule, and the flame-retardant capsule is of a core-shell structure with a flame retardant as an inner core and polymethyl methacrylate as an outer shell. Compared with the prior art, according to the diaphragm provided by the invention, when the battery is subjected to thermal runaway, the PMMA shell is broken and can release the flame retardant, the flame retardant can capture combustion free radicals and can effectively prevent thermal runaway and explosion of the battery, and the PMMA shell is adopted, so that better bonding force can be provided for the diaphragm and a pole piece; the problem that the cycle life of the battery is difficult to guarantee while the thermal runaway of the secondary battery is blocked at present is solved.

The invention discloses a battery box for coping with battery fire. The battery box comprises a shell, a battery cavity is formed in the shell, a battery is arranged in the battery cavity, the batteryis provided with a battery positive electrode and a battery negative electrode which are used for charging and discharging, and the battery box is further provided with a connecting device. The connecting device is used for connecting the battery with other external interfaces through the battery positive electrode and the battery negative electrode, the connecting device is provided with a triggering device and a cooling device, and when the battery is subjected to thermal runaway reaction, generated gas can start the triggering device. The cooling device cools the interior of the battery cavity when the triggering device is started. After the battery is subjected to thermal runaway, the external connection of the lithium battery can be disconnected, and gas and heat generated by the thermal runaway of the lithium battery can be taken away.

The invention relates to a mobile phone explosion proof device. The mobile phone explosion proof device comprises an indication lamp, a buzzer and a charging interface; the indication lamp is connected with a rack; the indication lamp is arranged at the upper left corner of the rack; the upper right corner of the rack is provided with the buzzer; the left side of the rack is provided with a fence B; the right side of the rack is provided with a fence A; the bottom end surface of the rack is provided with a fence C; the front surface of the rack is provided with a sensor and a heat absorbing block; the indication lamp, the buzzer, the sensor and the charging interface are connected with a controller; the sensor is a temperature sensor; and a through hole is formed in the left end surface and the right end surface of the heat absorbing block respectively. The mobile phone explosion proof device of the invention has advantages of high safety factor, stable performance, simple structure, convenient operation, low cost and excellent effects.

The invention discloses a ceramic diaphragm and a preparation method thereof, and a lithium ion battery. The method comprises steps that (1) ball milling of alumina ceramics is performed to obtain alumina ceramic powder; (2), mixing binder with organic solvent and polytetraethylene-pyridine is performed to obtain glue solution; (3), mixing the said alumina ceramic powder with the glue solution isperformed to obtain slurry; and (4), the slurry is applied to at least a part of a base film, and the ceramic diaphragm is obtained after drying. The method is advantaged in that the method can prepare the ceramic diaphragm with high air permeability and good thermal stability, the ceramic diaphragm can capture Mn2+ ions, the Mn2+ ions are applied to in a lithium ion battery, deposition of dissolved manganese on a negative electrode can be effectively reduced, and thereby safety performance and cycle performance of the lithium ion battery are improved.

The fire extinguishing device comprises a main conveying pipeline and a main controller, the main conveying pipeline is externally connected with a high-pressure fire extinguishing agent supply source, the tail end of the main conveying pipeline is connected with a plurality of groups of spraying pipes, each group of spraying pipes is provided with a plurality of nozzles, and each group of spraying pipes is provided with a valve. And the signal output end of the main controller is connected with the valve controller and the pressure reducing valve controller. The battery module has the beneficial effects that the after-combustion risk is extremely low, and heat radiation to surrounding batteries is reduced by absorbing heat of the thermal runaway battery, so that heat spreading in the battery module is prevented, and explosion is prevented.

The invention discloses a fireproof and explosion-proof power cable and a preparation method thereof, and relates to the technical field of power cables. The fireproof and explosion-proof power cable comprises a cable core, an outer insulating layer wrapping the cable core, an inner sheath longitudinally wrapping the outer insulating layer, a high-temperature belting layer wrapping the inner sheath, and an outer sheath extruding the high-temperature belting layer, wherein the cable core comprises a plurality of conductors and an inner insulating layer wrapping the conductors; each conductor is formed by twisting and pressing a plurality of copper wires; the inner insulating layer is formed by wrapping and drying an inorganic fire-resistant synthetic mica tape; and a gap in the cable core is filled with an inorganic fireproof filling material. The product provided by the invention has the advantages of fire prevention, bulletproof, static explosion resistance, high-strength impact resistance, cutting resistance, corrosion resistance, radiation protection and the like, and the potential safety hazard of the cable in various military and major civil engineering is greatly reduced.

The invention discloses an integrated hollow shaft phosphating and detection method based on a new energy automobile, and relates to the technical field of hollow shaft phosphating and detection. A fixed frame is lifted through a first telescopic rod and a first clamping jaw, a movable plate is moved in an insulating shell, a discharging chamber and a static chamber through a movable sliding rod,volatile gas in a phosphating pool can be prevented from being inhaled by an operator, a hollow shaft reacts in the phosphating pool to give out hydrogen, an exhaust fan sucks out the hydrogen in theinsulating shell, the hydrogen is compressed, collected and prevented from exploding when encountering high temperature in the insulating shell, the phosphating risk of the hollow shaft is reduced, anoutput shaft of a motor drives a first gear, a chain and a second gear to make the hollow shaft in a second clamping jaw to rotate, and the hollow shaft is in full contact with the interiors of the phosphating pool, a first solution bin, a second solution bin and a third solution bin, so that surface phosphating and detection of the hollow shaft react.