118results about How to "Extended escape time" patented technology

The invention provides a method for removing laser welding pores of a medium-thick D406A ultra-high-strength steel, and aims at solving the problem of pores of a medium-thick D406A ultra-high-strength steel plate in welding. The method comprises the following steps: grinding and cleaning a part to be welded; assembling; setting backing weld and filling weld process parameters; controlling the welding process parameters through a robot integration system; arcing through TIG (Tungsten Inert Gas Welding) electric arc; stabilizing the electric arc for 1 to 2 seconds; controlling a laser to emit laser; finally controlling a robot to drive a laser working head and a TIG welding gun to work together to finish the welding process. According to the method, different pore inhibiting measures are carried out for backing weld and filling weld.

The invention discloses phenolic glass steel which is prepared from the following components in parts by weight through pultrusion: 70-78 parts of glass fiber yarns, 4-8 parts of continuous glass fiber mats, 15-20 parts of phenolic resin, 0.6-1.1 parts of curing agent, 0.4-0.6 part of promoter and 0.4-0.6 part of iron trioxide, wherein the temperature of a pultrusion mould is 140-280 DEG C. The invention also discloses a subway evacuation platform made of the phenolic glass steel, and the subway evacuation platform includes a grid-type platform and a plate-type platform, wherein the cross section of the grid-type platform is T-shaped, and the countertop of the plate-type platform is a flat surface without a gap on the upper surface. The phenolic glass steel and the subway evacuation platform made of the same, provided by the invention, have the characteristics of light weight, easiness for installation and low production cost, and can meet the requirements for subway environments, namely, low heating value, no smoke or toxin, high strength and high ablation resistance.

The invention relates to the technical field of vehicle safety, and provides a method and a device for controlling a vehicle to automatically extinguish fire. The method disclosed by the invention comprises the following steps: detecting temperature and smoke concentration in a vehicle carriage; and judging whether the temperature value is beyond a first pre-set value and whether the smoke concentration is beyond a second pre-set value, if so, controlling a spray head in the carriage to begin to spray water, if not, judging whether the temperature value is beyond the first pre-set value, if so, sending out temperature super-standard alarm signals, if not, judging whether the smoke concentration is beyond the second pre-set value, if so, sending out smoke concentration super-standard alarm signals, and if not, detecting temperature and smoke concentration in the vehicle carriage again. When a fire happens in a vehicle, the fire behaviour in the vehicle can be controlled in time; the time for passengers to escape and the time for salvaging goods are prolonged; and simultaneously, fire can be extinguished.

The invention discloses a fireproof door. The fireproof door comprises a rectangular metal shell and further comprises a top plate, a bottom plate, a fireproof plate, a material box and a sealing plug, wherein the front face of the rectangular metal shell is provided with a discharging opening, and the top plate and the bottom plate are arranged at the top end and the bottom end of the metal shell; the fireproof plate, the material box and the sealing plug are arranged between the top plate and the bottom plate from rear to front. The material box is provided with a box opening connected with the discharging opening in a butt joint mode. The material box is filled with dry powder extinguishing agents. The box opening is provided with a packing film. The sealing plug blocks the box opening and the discharging opening. The fireproof door has a certain extinguishing function, the fireproof performance is improved, and the fire spread time is prolonged, so that people have more time to escape from the fire.

The invention discloses a safety door capable of automatically opening during fire and a method. The safety door comprises a door frame mounted on a wall and a door body movably connected with the door frame through a hinge, wherein an intelligent lock locked together with the door frame is mounted on the edge of the middle of the door body, an automatic opening mechanism is installed between thedoor body and the door frame, and an induction mechanism is mounted on the indoor surface of the door body. The automatic opening mechanism comprises a door head seat, a sliding seat, a motor, a leadscrew and a sliding plate, wherein the door head seat is fixed on the top surface, close to the door frame, of the door body through a screw. The safety door and the method have the beneficial effectsthat after any one of temperature, sound and smoke data exceeds a set threshold value, a processor controls the intelligent lock to open the door firstly, the processor controls a motor, the lead screw rotates to drive the sliding plate to horizontally slide leftwards on the sliding seat, in the process that the sliding plate horizontally slides leftwards on the sliding seat, a lantern ring of aconnecting rod rotates around a second rotating shaft, the connecting rod is pushed to rotate around a first rotating shaft, the door body is driven to be opened, the purpose of automatic door openingis completed, and the escape time is prolonged.

The invention discloses a tunnel lighting warning system. The tunnel lighting warning system which is convenient to install and good in using effect aims at solving the problem that an existing tunnel lighting system is large in electricity consumption. The tunnel lighting warning system comprises a light reflecting ring; the light reflecting ring is composed of a plurality of light reflecting ring units, the light reflecting ring units comprise supports and light reflecting pieces, skirt edges are arranged on the supports, the supports are installed on the inner wall of a tunnel, the light reflecting pieces and the supports are connected, the light reflecting pieces are in V shapes, incident light is reflected to the road face in a better angle, and the lighting effect is improved. The skirt edges are arranged on the supports, and the light reflecting pieces and the skirt edges of the supports are connected; protruding hooks are arranged on the skirt edges, first holes are formed in the light reflecting pieces, the first holes are matched with the hooks, and installing is convenient. Compared with an existing tunnel lighting device, the tunnel lighting warning system has the advantages of being low in energy consumption and good in shining effect.

The invention discloses a fireproof door with a triple fireproof function. The fireproof door comprises a fire-resisting door frame and a main fireproof door body; water tanks are arranged at the twoends of the upper portion of the fire-resisting door frame, and firefighting spraying heads are mounted below the water tanks; door spindles are sequentially fixed to the inner side of the fire-resisting door frame, fireproof shells are arranged at the front end and the rear end of the main fireproof door body, rolling wheels are fixed to the upper end and the lower end of the interior of each fireproof shell, and sliding fire-resisting doors are arranged between the rolling wheels; and the sliding fire-resisting doors are stored in the fireproof shells, anti-collision protruding blocks are mounted on the outer surfaces of the fireproof shells, pulling handles are arranged on the outer sides of the sliding fire-resisting doors, and a fire-resisting plate is arranged in the main fireproof door body. According to the fireproof door with the triple fireproof function, a three-layer fireproof structure is formed by the mounted main fireproof door body and the fireproof shells at the frontend and the rear end of the main fireproof door body, erosion of the fire behavior on the main fireproof door body can be weakened under blocking of the fireproof shells, and thus the fire-resisting performance of the fireproof door with the triple fireproof function is improved.

The invention provides a ventilation and smoke discharge method for train fire in a subway section. A ventilation and smoke discharge system for fire of a subway tunnel is used for dealing with the fire. The ventilation and smoke discharge method comprises a first smoke discharge and air supply mode and a second smoke discharge and air supply mode; the subway tunnel comprises a first tunnel and asecond tunnel, air openings are separately formed in a junction between a section tunnel and a station tunnel of the first tunnel and a junction between a section tunnel and a station tunnel of the second tunnel, each air opening is connected with a smoke discharge air flue, and a fan and an air valve are arranged in each smoke discharge air flue; and the first smoke discharge and air supply modeis used in the circumstance that the head or tail of a train in the first tunnel catches fire, and the second smoke discharge and air supply mode is used in the circumstance that the middle of the train in the first tunnel catches fire. According to the method, the flowing direction of smoke is controlled in time by the smoke discharge air flues in the subway section tunnels when the train fire occurs in the subway section, smoke is discharged, air pressure in the tunnel is controlled, thus, poisonous smoke is not diffused to crowd, and subway safety is improved.

The invention discloses a construction method of an underground large water-flow mine emergency water sump. When in the multi-middle-segment exploitation of a mine, the middle segment at the bottommost part is locally exploited in advance through an open-stope method and a mined-out area is formed as the emergency water sump of the mine; when fragmentary and leftover orebodies under or beyond exploitation exist in a mineral deposit, a set of small production system is formed at a position below the lowest exploitation level by utilizing blind incline shaft or blind vertical shaft exploitation, and the orebodies at a boundary part or the fragmentary orebodies are mined out to leave the mined-out area as the emergency water sump. The capacity of the emergency water sump is designed according to the water permeation capacity of 8-10 hours, the highest elevation of the emergency water sump is below the lowest production level, an inlet thereof is communicated with a haulage roadway at the lowest mining level, a patio is arranged at the upper part of the emergency water pump, and the patio is communicated with a level and an air shaft at the upper middle segment. The emergency water sump not only can have remarkable effect for the emergency capability for water permeation accidents of a limited water source, but also strives for valuable self-rescue time for hours when disasters in the type of unlimited water sources, such as underground rivers, surface water sources, and the like of the mine occur.

The invention relates to the technical field of security protection devices and particularly relates to an anti-theft door and an anti-theft door system. The anti-theft door comprises a door frame, a door body and a door lock, which are connected in sequence, and further comprises an air spring, wherein one end of the air spring is connected with the door frame and the other end of the air spring is connected with the door body; the door lock is internally provided with a controller; and the door body and / or the door frame are / is provided with an air spring storing cabin. The anti-theft door system comprises the anti-theft door. With the adoption of the anti-theft door and the anti-theft door system, provided by the invention, the use comfort and automation of the intelligent anti-theft door are improved; and when emergency conditions including earthquakes and fire disasters and the like occur, the anti-theft door can be automatically opened, a life channel is opened for escaping and precious escaping time is increased.

The invention relates to a long channel firefighting system, which is applied in the long channel provided with an air inlet and an air outlet . The invention comprises a first water spray curtain device, a second water spray curtain device, and at least a third water spray curtain device, wherein the first water spray curtain device is arranged at top part of the wind inlet, the second water spray curtain device is arranged at top part of the air outlet , the third water spray curtain device is arranged at top part of the long channel between the air inlet and the air outlet so as to divide the long channel into a plurality of firefighting areas. The purpose of the invention is to prolong escape time when disaster happens, and reduce the influence of thick smoke on persons.

The invention relates to the technical field of batteries, and discloses a power battery which comprises a battery cell and a battery box, the battery box is provided with an accommodating cavity, the battery box comprises a lower box body and an upper box body, the upper box body covers the lower box body, and the battery cell is fixed on the lower box body so as to be positioned in the accommodating cavity. A first pressure relief channel and a second pressure relief channel which are communicated with each other are arranged on the lower box body, the lower box body comprises a bottom plate and a side beam arranged in the circumferential direction of the bottom plate, the first pressure relief channel is arranged on the bottom plate, the second pressure relief channel is arranged in the side beam and can be communicated with the outside, the battery cell is arranged on the bottom plate, and the pressure relief valve is arranged towards the first pressure relief channel. When thermal runaway of the battery cell occurs, harmful substances can be directly sprayed into the first pressure relief channel and discharged out of the battery box through the second pressure relief channel, so that the spreading speed of thermal diffusion in the battery box is reduced, and the safety performance of the battery system is improved. The invention further discloses a vehicle which comprises the power battery, and harmful substances can be discharged in time when the battery cell is in thermal runaway.

The invention relates to the technical field of fire-fighting equipment, and discloses a fire resisting shutter capable of controlling slip speed and stopping falling at any time. The fire resisting shutter comprises a shutter box, wherein a rotating shaft is movably connected to the interior of the shutter box, the outer side of the rotating shaft is fixedly connected with a winding drum, a shutter is arranged on the outer side of the winding drum, the outer side of the rotating shaft and located on the right side of the winding drum is fixedly connected with a driving gear, the inner right wall of the shutter box is fixedly connected with a control box, and the left side of the control box is movably connected with a linkage shaft. Under the condition of power failure and fire, a brake is pulled apart after a fuse release device is blown, the self weight of the fire resisting shutter is reduced, a fixed rod and a centrifugal block are driven to rotate through the power generated whenthe fire resisting shutter descends, when the centrifugal block rotates, the centrifugal block is influenced by centrifugal force, so that a friction plate on the centrifugal block is in contact withthe inner wall of the control box, when the descending speed of the fire resisting shutter is accelerated, the rotating speed of the linkage shaft is accelerated, the centrifugal force of the centrifugal block is increased, and the contact friction between the friction plate and the inner wall of the control box is increased.

The invention discloses a fireproof door. The fireproof door comprises a rectangle metal casing provided with a discharging port in front and is characterized by further comprising a top plate, a base plate, a fire-resisting plate, a material box and sealing plugs, wherein the top plate and the base plate are arranged at the top end and the bottom end of the metal casing, and the fire-resisting plate, the material box and the sealing plugs are arranged between the top plate and the base plate from back to front. The material box is provided with a box port in butted joint with the discharging port, a dry powder extinguishing agent is filled inside the material box, and an encapsulation film is arranged at the position of the box opening. The sealing plugs are plugged into the box port and the discharging port. The fireproof door has the advantages of improving the fireproof performance, having a certain fire extinguishing function, prolonging fire propagation time and increasing time for people escape.

The invention discloses a compressed oxygen self-rescuer for an underground coal mine. The compressed oxygen self-rescuer comprises a self-rescuer body, wherein an oxygen storage cavity is formed in the side wall of the self-rescuer body; an air bag is fixedly connected to the upper end of the self-rescuer body; a respirator communicating with the interior of the air bag is installed at the upperend of the air bag; a water storage tank is formed in the side wall of the self-rescuer body; a first circular groove is formed in the side wall of the self-rescuer body; an air inlet pipe communicates between the first circular groove and the oxygen storage cavity; an air outlet pipe communicates between the first circular groove and the air bag; and a control valve is installed in an air outlet.According to the compressed oxygen self-rescuer, water flows into an exhaust pipe to be fully combined with smoke and then is discharged, the concentration of smoke nearby an escape person wearing the self-rescuer can be greatly reduced, the escape person can clearly see the nearby road condition and the fire condition, and therefore the survival possibility of the escape person is increased; mist water is sprayed to the body of a wearer to replace water loss in the human body, the escape person can be prevented from being dehydrated and died, and therefore the self-rescue performance of thedevice is improved.

The invention relates to an internal supporting and heat dissipation device for welding of a thin-walled half pipe and a using method of the internal supporting and heat dissipation device. The internal supporting and heat dissipation device comprises an upper base plate, a lower base plate, a screw sleeve, a first rotating screw and a second rotating screw, wherein the two ends of the screw sleeve are connected with the first rotating screw and the second rotating screw in a threaded mode correspondingly; and the screw sleeve, the first rotating screw and the second rotating screw are located between the upper base plate and the lower base plate, the upper base plate is supported by the first rotating screw, and the lower base plate is supported by the second rotating screw. By adoption of the internal supporting and heat dissipation device for welding of the thin-walled half pipe and the using method of the internal supporting and heat dissipation device, the welding quality of the thin-walled half pipe is greatly improved.

The invention relates to the technical field of vehicles, and discloses a power battery, a thermal diffusion protection method of the power battery and a vehicle. The power battery comprises a shell and a module assembly arranged in the shell, the shell comprises an upper cover and a bottom plate which are buckled with each other, the module assembly comprises a plurality of modules which are electrically connected with each other, an explosion-proof valve is arranged on the upper cover or the bottom plate, the power battery further comprises a fireproof assembly, an exhaust passage and an insulating assembly, and the fireproof assembly is arranged between the module assembly and the upper cover; an exhaust passage communicated with the explosion-proof valve is formed between the edge of the module assembly and the inner side wall of the shell; the insulating assembly is arranged between two adjacent modules. The fireproof assembly can be used for preventing gas from breaking through the upper cover during thermal runaway; the exhaust assembly is used for guiding the gas, so that the gas flows out of the power battery through the exhaust assembly and the explosion-proof valve; meanwhile, the insulating assembly arranged between the two adjacent modules can effectively improve chain reactions such as high-voltage short circuit and the like in the module assembly when the power battery is in thermal runaway.

The invention discloses an expansion and sealing type movable fireproof door. The expansion and sealing type movable fireproof door comprises a fireproof door frame, a connection hinge and a fireproofmain bracket body, wherein the inner side of the fireproof door frame is provided with a fireproof door sheet, the left side of the fireproof door sheet is provided with the connection hinge, the fireproof door sheet is connected with the fireproof door frame through the connection hinge, the fireproof door sheet is provided with a lock, a sealing ring is arranged between the fireproof door sheetand the fireproof door frame, the inner side of the fireproof door sheet is provided with an insulated door sheet, a vertical rod is provided with a third board body, and the third board body is located in a fireproof auxiliary bracket body. The expansion and sealing type movable fireproof door has the advantages that after high-temperature combustion is carried out, the fireproof door sheet, a fireproof door frame framework, the fireproof main bracket body and the fireproof auxiliary bracket body which are made from a stainless material still provide a good protective capacity, so that a burned penetration phenomenon is avoided, thereby preventing the situations of fire spreading and flue gas leakage, and the escape time can be prolonged for related personnel, thereby improving the escape probability of the related personnel.

The invention discloses a fireproof door with triple protection functions. The fireproof door comprises a fireproof door frame and a main fireproof door. Water tanks are arranged at the two ends of the upper portion of the fireproof door frame, fire-fighting spraying heads are mounted below the water tanks; door shafts are sequentially fixed on the inner side of the fireproof door frame; fireproofshells are arranged at the front end and the rear end of the main fireproof door; rollers are fixed to the upper end and the lower end of the interior of each fireproof shell, a push-pull fire-retardant door is arranged between the rollers, the push-pull fire-retardant door is arranged in each fireproof shell, an anti-collision lug is arranged on the outer surface of each fireproof shell, a handle is arranged on the outer side of each push-pull fire-retardant door, and a flame-retardant plate is arranged in the main fireproof door. The main fireproof door installed on the fireproof door withtriple protection functions and the fireproof shells at the front end and the rear end of the main fireproof door form a three-layer fireproof structure, fire can that causes damage to the main fireproof door is weakened under blocking of the fireproof shells, and therefore the fire retardance of the fireproof door with triple protection functions is improved.

The invention relates to a fire extinguishing system for fire-fighting engineering. The fire extinguishing system comprises water curtain walls which are arranged on the two sides of the vertical direction of a fire fighting access in the length direction of the fire fighting access correspondingly, wherein the interiors of the water curtain walls are hollow; water curtain devices are arranged inthe water curtain walls and comprise overflow boxes, water pumps and first water pipes; the overflow boxes are arranged above the interiors of the water curtain walls in the length direction of the fire fighting access; a first overflow opening communicated with the interior of the water curtain wall is formed in the upper end of the overflow box in the length direction of the overflow box; and the water pumps are arranged below the interiors of the water curtain walls and communicated with the overflow boxes through the first water pipes. The fire extinguishing system has the effects that thespreading speed of fire from the outside to the inside of the fire fighting access is reduced, and the escape time of escape personnel is prolonged.

The invention discloses a geological disaster early warning method, which comprises the steps that 1, a server generates dangerous area early warning information through a disaster prediction model according to geological real-time monitoring early warning data, historical disaster data and disaster prediction data, and pushes the dangerous area early warning information to an early warning processing platform installed on a mobile terminal; 2, position information of the corresponding mobile terminal is analyzed; 3, the position information is compared with the dangerous area early warning information; and if the mobile terminal is located in a dangerous area, alarm information is pushed to the mobile terminal to prompt the user to check, and meanwhile, the early warning processing platform stops pushing the alarm information to the mobile terminal after the user leaves the dangerous area according to the optimal evacuation information planned for the user to leave the dangerous area,and the early warning is ended. The method has the advantages of being timely in early warning information release, short in response time, simple in operation and the like, and the problem that a lot of public resources are wasted due to group sending of early warning information is avoided.

The invention belongs to the automobile safety field, in particular to a seat safety ejection device for automobiles, which comprises an automobile chassis, a positioning square hole, a first slidinggroove, a fixing block, an eighth sliding groove, a clamping block, a stopper, an ejection mechanism, wherein a positioning square hole penetrating between an upper end face and a lower end face of the automobile chassis is provided; a first sliding groove is formed on the inner wall of the positioning square hole close to the side of the vehicle head; the ejection mechanism is installed on the chassis of the automobile. The ejection mechanism in the invention is hard drive, the reaction time of the hard drive is rapid compared with the drive controlled by the sensor and the control system inthe automobile, and the time provided to the driver for escape is prolonged, and the success rate of escape is greatly improved. When the front of the vehicle is impacted by high speed, the ejection mechanism ejects the person from the cab through the skylight, so that the person will not be seriously injured due to the squeeze deformation of the vehicle, thereby avoiding the irreversible casualties caused by the secondary injury, and furthermore, the public resources are saved to the maximum extent.

The invention provides a rocket launcher fire extinguishing bomb launching device used for unmanned aerial vehicle fire extinguishment. Two layers of rocket launcher hanging brackets are arranged and are fixed on an undercarriage through clamping blocks respectively. Each rocket launcher is hung on a launching guide rail located on the lower surface of each rocket launcher hanging bracket. The undercarriage is of an integrated framework structure. The undercarriage is composed of a hanging bracket and a pair of supporting frames. The supporting frames are fixed at the two sides of the lower surface of the hanging bracket. In the square hanging bracket, the lower surface of an upper edge frame and the lower surface of a lower edge frame are mounting surfaces of the rocket launcher hanging brackets. The pair of supporting frames can be formed through welding round hollow aluminum pipes. The supporting frames are fixed at the two sides of the lower surface of the hanging bracket in an external splayed shape. The rocket launcher fire extinguishing bomb launching device is located at the bottom of a cover plate of an unmanned aerial vehicle and is mounted on a lower bottom plate of the unmanned aerial vehicle; the rocket launcher fire extinguishing bomb launching device carries a rocket launcher aerosol fire extinguishing bomb for put out fire of a fire scene of a high-rise building, and the combustion speed can be effectively delayed so that relatively long escaping time is won for people.

The invention discloses a myriawatt-level laser double-beam welding method for inhibiting a welding liquid column and splashing, and belongs to the technical field of laser processing. The technical problem that a large welding liquid column is prone to be formed and is evolved to welding splashing according to an existing myriawatt-level high-power laser in a non-penetration welding mode is solved. According to the method, two double-beam lasers which are arranged front and back in the welding direction and are different in light spot size and laser power are adopted for metal material welding, the rear laser beam is large in power and small in light spot diameter and is used for penetration fusion welding, and the front laser beam is small in power and large in light spot diameter and is used for melting base metal shallow metal to form a front molten pool, which is in Communication with a rear molten pool formed through the rear laser beam, during welding, through the mode that part of metal surges of the rear molten pool are guided to enter the front molten pool, the pressure of liquid metal on the front edge of a keyhole of the rear light beam is reduced, a longitudinal liquid column is prevented from growing and being evolved to splashing, and good surface forming of myriawatt-level high-power laser welding is achieved.

The invention provides a water-permeation-proof outburst-proof buffer device. The device comprises a fixing mechanism, a buffering door curtain and a triggering mechanism, the fixing mechanism is fixed to the top end of a roadway, the buffering door curtain is installed on the fixing mechanism, the buffering door curtain is rolled from the bottom end to the top end and is fixed through the fixingmechanism, the triggering mechanism is connected with the fixing mechanism, and the triggering mechanism is fixed to the top end of the roadway; and the buffering door curtain comprises a plurality ofcurtain bodies, a pocket is arranged at the lower portion of each curtain body, and the length of each curtain body is larger than the height of the roadway. The problem that an outburst prevention air door is far away and cannot respond quickly is solved, the protection performance is improved, and the escape time is prolonged.

The invention discloses an automatic unlocking door opening system for fire. The automatic unlocking door opening system comprises a lock catch body embedded in a door frame and a controller embeddedin a wall, wherein the lock catch body comprises a lock catch plate and a plurality of lock groove boxes; a plurality of lock holes are formed in the positions, corresponding to the lock groove boxes,of the lock catch plate; a piston plate is installed in each lock groove box in a sealed and sliding manner; an ejection column is installed on the side, close to the corresponding lock hole, of eachpiston plate; and a spring wire is installed on the side, away from the corresponding lock hole, of each piston plate. According to the automatic unlocking door opening system, fire heat is transmitted to thermal expansion liquid through a heat conduction plate so that the thermal expansion liquid can expand, the piston plates and the ejection columns are pushed to move towards the lock holes through drainage of guide pipes so that lock tongues can be pushed out of the lock groove boxes to be unlocked, and the automatic unlocking function for fire is achieved; and in addition, the ejection columns enter the lock holes so that an alarm circuit can be connected to give out alarm sounds to disperse surrounding personnel, an effective rescue channel is provided for firefighters, and the rescue time is saved.

The invention discloses a novel grouping structure of large cylindrical battery cells. The novel grouping structure comprises a plurality of battery cells, and a battery cell group consisting of an upper bracket and a lower bracket at two ends of the battery cells; the middle parts of the upper bracket and the lower bracket are respectively provided with a plurality of filling columns and glue pouring columns which are matched with each other; the filling columns are provided with gaskets for interfering the movement of the circumferential battery cells; glue filling holes matched with the filling columns are formed in the centers of the glue filling columns; glue is arranged in the glue filling holes; busbars are arranged at the two ends of the battery cell group; and a heat conduction pad, a heating film and a heat preservation pad are sequentially arranged on the outer sides of the busbars. The invention provides a novel grouping structure of large cylindrical battery cells, which can improve the welding tear resistance of an aluminum tab of the large cylindrical battery cell, balance the heating area of a single battery cell and ensure the temperature rise consistency.

The invention provides an application of mannose as a hydrogen escape retardant, and also provides hydrogen-rich water containing mannose as the hydrogen escape retardant. Mannose is added into hydrogen-rich water, hydrogen-rich water with hydrogen escape inhibited to a certain extent is obtained, and a new technical approach for solving the problem of short shelf life of the hydrogen-rich water is expected to be provided.