1608results about How to "Small size" patented technology

Disclosed is a wheel cylinder and a drum brake having the same, in which the number of position as well as other elements accompanied with the piston may be reduced, resulting in reduced manufacturing cost.

The utility model provides a pole, a top cover assembly, a battery monomer, a battery and a power utilization device, and relates to the technical field of batteries, the pole comprises at least one first connecting part and at least two second connecting parts, along a second direction, the first connecting part has a third surface; the at least two second connecting parts are used for being connected with the tabs, each second connecting part comprises a main body part and a first flanging part, each first flanging part is connected to one end face, in the second direction, of the corresponding main body part and extends towards the corresponding first connecting part, each first flanging part is connected with the corresponding first connecting part, and each first flanging part is provided with a fourth face in the second direction; and the fourth surface and the third surface are positioned on the same side in the height direction of the post terminal, are positioned on the same plane and form a second surface. Therefore, the processing of the pole is more convenient, and the size of the pole in the width direction can be reduced.

This invention discloses a spot-and-ring laser filler wire welding method, comprising the following steps: cleaning the surface and bevel of the welding plate, and fixing the welding plate on a welding fixture; using a circular spot and an annular spot as a composite heat source for narrow-gap multi-layer filler wire welding of the welding plate; adjusting the defocusing amount, setting the diameter of the circular spot, and setting the diameter of the annular spot; setting the power of the circular spot and the power of the annular spot; setting the welding speed and the wire feeding speed; starting the welding system to perform welding, selecting the number of welding passes until the welding plate completes the butt welding. This invention uses a circular spot and an annular spot as a composite heat source for narrow-gap multi-layer filler wire welding. The circular spot is used to melt the filler wire to perform laser filler wire welding, and the annular spot is used to heat the sidewalls, preventing sidewall melting defects. This can avoid sidewall incomplete fusion defects during narrow-gap welding of thick plates.

The utility model relates to a tool changing device and a machining system, the tool changing device comprises a pick-and-place mechanism, and the pick-and-place mechanism is used for picking and placing a cutter head or a cutter box; in the cutter position, the cutter obtained by the taking and placing mechanism is placed in the cutter position, and the new cutter box and the old cutter box are exchanged in the cutter position; and the cutterhead opening and closing mechanism is used for opening or closing the cutterheads at the cutterhead positions, when the cutterheads are opened, the cutter boxes can be taken out or put into the cutterheads, and when the cutterheads are closed, the cutter boxes in the cutterheads are fixed. The cutter box in the cutter head can be replaced on the cutter replacing device, efficient circulation of cutters is achieved, the number of used cutter heads is reduced, and cost is reduced.

The invention belongs to the technical field of bar production, and particularly relates to a production method of a steel bar for a heavy-load automobile half axle, and the steel bar comprises the following chemical components in percentage by mass: 0.39-0.42% of C, 0.25-0.35% of Si, 1.45-1.70% of Mn, less than or equal to 0.013% of P, less than or equal to 0.006% of S, less than or equal to 0.25% of Cr, less than or equal to 0.25% of Ni, 0.15-0.20% of Mo, 0.06-0.10% of V, less than or equal to 0.15% of Cu and the balance of Fe and inevitable impurities. The method has the advantages that high-performance, high-purity and low-cost production of the steel bar for the heavy-duty automobile half shaft is realized through green short-process production of'ecological electric furnace + LF + RH + continuous casting 'in combination with low-carbon component design and a controlled rolling and controlled cooling process. And macrostructures and non-metallic inclusions of the finished steel meet the requirements of high-end products.

The invention discloses a conjugated polymer film with electrical properties and tensile stability simultaneously improved, and a preparation method and application thereof, and belongs to the technical field of flexible electronic materials. The preparation method comprises the following steps: placing the conjugated polymer film in a solution formed by mixing an electrolyte and a dopant, and soaking for 30-60 seconds to complete ion exchange doping, thereby obtaining the conjugated polymer film with various carrier transport channels. The strategy of increasing the types of carrier transmission channels is adopted, and two main transmission channels of a crystal phase and an accumulation region are formed in the conjugated polymer film through an ion exchange doping method, so that the conjugated polymer film can maintain the electrical property at a high proportion under a stretching external field, and the electrical property of the conjugated polymer film is improved under the same stretching strain. And the tensile stability of the conductivity is far higher than that of a conjugated polymer film which only takes a crystal phase or an accumulation region as a carrier transmission channel.

The present disclosure relates to a continuous positive airway pressure, CPAP, system comprising: a flow generator including a blower that supplies breathable gas at pressure; a patient interface; and an air delivery conduit interconnecting the flow generator and the patient interface, the air delivery conduit including a conduit portion having an internal diameter of less than 19 mm.

This invention relates to the field of laser special light source technology, and provides a laser-driven white light source device, which includes a laser source, an optical system, a gas-loaded structure, and a high-voltage driving component. The laser source is suitable for providing a laser beam; the optical system is suitable for focusing the laser beam; the gas-loaded structure is located on the side of the optical system away from the laser source, and the center of the gas-loaded structure corresponds to the focusing area of ​​the laser beam; the high-voltage driving component is suitable for igniting plasma within the gas in the gas-loaded structure; wherein, the gas-loaded structure has a gas carrier incident surface and a gas carrier exit surface arranged opposite each other along the propagation path, and the curvature of the gas carrier incident surface and the gas carrier exit surface is constant in the direction perpendicular to the propagation path. This application can reduce the generation of aberrations, thereby reducing the size of the emitting point and resulting in better consistency of the emitting point; at the same time, the uniformity of white light output and the spectral radiance are also better.

The utility model relates to a kind of prepreg laying-up auxiliary devices, including material bearing assembly;The material bearing assembly includes cavity, the corner of the cavity is equipped with avoidance groove, the depth of the avoidance groove is same with the depth of the cavity;The inner wall of the cavity is equipped with at least one material taking groove and multiple limit grooves along its long side extension direction, the depth of the material taking groove is greater than the depth of the cavity;Multiple limit grooves are symmetrically set on the inner wall of the two sides of the cavity;The upper surface of the cavity is equipped with angle mark, and the angle mark includes at least one scale line for indicating the laying direction of prepreg.The prepreg laying-up auxiliary device of the application reduces the problems such as difficult to enter the mold and misplacement caused by size problem by controlling the size of laying-up blank;In addition, by matching the material cutting size with the cavity, the splicing gap or uneven lap phenomenon caused by artificial splicing is reduced, which is beneficial to size positioning when splicing prepreg.

The utility model discloses a kind of lifting rod structure and shower, the lifting function of bar can be realized, and product can be designed thinner. Among them, lifting rod structure includes wall seat, bar, limiting piece, elastic member and operating part;The wall seat is pre-fixed on mounting surface;The bar is along with the wall seat sliding fit along up-down direction;The limiting piece is along with the bar sliding fit in left-right direction, for when realizing the locking of up-down direction when abutting the wall seat;The elastic member is arranged in the bar and acts on the limiting piece, to make the limiting piece abut the wall seat;The operating part is parallelly arranged with the movement direction of the limiting piece, and telescopic cooperation is in the side of the bar;The operating part and the limiting piece linkage to realize user through the operating part drive the limiting piece and the wall seat separate.

The application provides a focusing motor and a camera module. The focusing motor comprises a fixed part, a moving part, a focusing assembly, a magnetic attraction sensing part, a guide part and a position sensor. The fixed part comprises a first support arm and a second support arm connected with each other, and a light passage hole formed between the first support arm and the second support arm. The moving part is arranged in the light passage hole and can move in a preset direction. The magnetic attraction sensing part is arranged in the moving part. The angle between the magnetization direction of the magnetic attraction sensing part and the first direction and the second direction perpendicular to the preset direction is an acute angle. The guide part is arranged on the first support arm and corresponds to the magnetic attraction sensing part. The position sensor is arranged on the second support arm and corresponds to the magnetic attraction sensing part. The position sensor can generate an induction force with the magnetic attraction sensing part, so that the position sensor can sense the moving position of the moving part. The focusing motor can significantly reduce the size of the focusing motor, and can guarantee the guiding stability and the position detection precision required by the automatic focusing function while realizing the miniaturization of the camera module.

The application relates to the field of assembly building technology and discloses an assembled sound insulation and shock absorption laminated floor slab, which comprises a pouring plate, the outer part of the pouring plate is provided with a cladding structure, the cladding structure comprises a main frame, a side stop, an upper stop rod and a connecting groove, the two upper stop rods are fixedly installed on the side stop, the upper stop rod can be detachably connected with the main frame and forms a box body structure to cladding the pouring plate, a connecting groove is arranged on one side of the main frame, and a protrusion is fixedly arranged on the other side of the main frame; and a cushion block assembly, the pouring plate is assembled with the main frame, the side stop and the upper stop rod at a construction site after being prefabricated in a factory, the modular design makes the components separable for transportation, the size and weight of a transportation unit are greatly reduced, the transportation cost and hoisting difficulty are reduced, the on-site assembly is flexible, the size deviation of the actual installation position can be fine-tuned, and the adaptability is high.

This application provides a vertical heat recovery coke oven waste heat exchange unit, waste heat utilization system, and method, using supercritical carbon dioxide as the heat exchange medium. The unit includes a main compressor, a regenerator assembly, a high-pressure turbine, a low-pressure turbine, a precooler, and a heat exchanger. The heat exchanger internally houses a high-temperature superheater, a high-temperature reheater, a low-temperature superheater, a low-temperature reheater, an air-cooled wall, and an economizer. The main compressor outlet is connected to the cold-side inlet of the regenerator assembly, and the cold-side outlet of the regenerator assembly is connected to the working fluid inlet of the heat exchanger. The working fluid flows sequentially through the economizer, the air-cooled wall, the low-temperature superheater, and the high-temperature superheater before entering the inlet of the high-pressure turbine. The high-pressure turbine outlet is connected to the inlet of the low-temperature reheater, the low-temperature reheater outlet is connected to the inlet of the high-temperature reheater, and the high-temperature reheater outlet is connected to the inlet of the low-pressure turbine. The low-pressure turbine outlet is sequentially connected to the hot side of the regenerator assembly, the precooler, and the main compressor inlet.

The application provides an automobile engine compartment drainage air intake system and a vehicle, and belongs to the technical field of automobile parts, wherein the automobile engine compartment drainage air intake system comprises a ventilation cover plate, an air chamber, a left drainage groove structure and a right drainage groove structure; the middle part of the top plate of the air chamber is concave downward, and an accommodation space extending along the length direction of the air chamber is formed between the top plate and the ventilation cover plate; the left drainage groove structure is arranged below the ventilation cover plate; the right drainage groove structure comprises a drainage groove body, the drainage groove body is arranged in the accommodation space, and the opening of the drainage groove body is communicated with the water inlet. The automobile engine compartment drainage air intake system provided by the application correspondingly sets the drainage groove structure as the left drainage groove structure and the right drainage groove structure; two drainage groove structures are used for drainage respectively, so that the drainage groove structure does not span the width direction of the vehicle body, the space occupation area of the drainage groove is smaller, the size of the engine compartment is reduced, the layout in the engine compartment is optimized, and the engine compartment maintenance is facilitated.

This invention belongs to the field of microwave communication technology, specifically relating to a PIFA antenna for 5G dual-band coverage. The invention includes a rectangular metal patch on a top surface, a substrate, and a metal ground plane stacked from top to bottom. A row of grounding vias is disposed through the substrate, and this array of grounding vias is located at the lower end of one side of the rectangular metal patch on the top surface. A coaxial feeding structure is disposed below the rectangular metal patch on the top surface. The antenna excites its fundamental mode TM through the coaxial feeding structure. 0.5,0 Mode and three higher-order modes TM 0.5,1 Pattern, TM 0.5,2 Pattern, and TM 0.5,3 The pattern includes a rectangular metal patch on the upper surface with a first slot along its vertical center line; the first slot has an opening on the side furthest from the grounding via for adjusting the TM. 0.5,1 Pattern and TM 0.5,3 The resonant frequency of the mode; a pair of second slits are orthogonally arranged on both sides of the first slit; the second slits are used to modulate the TM. 0.5,0 Pattern and TM 0.5,2 The resonant frequency of the mode. The antenna design proposed in this invention has advantages such as simple structure, relatively wide dual-band coverage, small size, and low profile.

The application provides an optical camera lens, comprising a lens barrel, a first lens to a sixth lens, a first spacing element located on the image side of the first lens and in contact with the image side surface of the first lens, a second spacing element located on the image side of the second lens and in contact with the image side surface of the second lens, a third spacing element located on the image side of the third lens and in contact with the image side surface of the third lens, a fourth spacing element located on the image side of the fourth lens and in contact with the image side surface of the fourth lens, and a fifth spacing element located on the image side of the fifth lens and in contact with the image side surface of the fifth lens; the maximum field angle of the optical camera lens is greater than 110 degrees; the outer diameter D5s of the object side surface of the fifth spacing element, the inner diameter d5s of the object side surface of the fifth spacing element, the effective focal length f of the optical camera lens, and the maximum field angle FOV of the optical camera lens satisfy the following relationship: (D5s+d5s) / [f*tan(FOV / 2)]<2.0. The application solves the problem of poor edge imaging quality of the optical camera lens in the prior art.

This utility model relates to the field of fluid control technology, and in particular to a fluid distribution device and a pneumatic comfort system. The fluid distribution device includes an air seat, a first air valve, and a second air valve. The air seat has an inlet channel, an inflation channel, a deflation channel, and a connecting channel, all of which are fluidly connected to the connecting channel. The first air valve is located on the air seat and controls the opening and closing of the inlet channel and the connecting channel. The second air valve is located on the air seat and controls the opening and closing of the deflation channel and the connecting channel. Through this method, during inflation, the airflow can be rapidly supplied to the gas-using equipment sequentially through the inlet channel, the connecting channel, and the inflation channel. During deflation, the gas flows rapidly from the inflation channel through the connecting channel and the deflation channel, eliminating the need for the gas to flow through the gap between the valve core and the valve body. This shortens the inflation and deflation path, enables high-flow inflation and deflation, and improves inflation and deflation efficiency.

This disclosure provides an ultrasonic transducer assembly, a single-element ultrasonic transducer, and an ultrasonic testing device. The ultrasonic transducer assembly includes a first matching layer, a second matching layer, a piezoelectric material layer, and a conductive backing layer stacked sequentially from top to bottom. The first matching layer is made of a non-conductive material, and the second matching layer is made of a conductive material. The upper surface of the first matching layer is the ultrasonic signal emitting surface, and signal electrodes are disposed on the side of the second matching layer. This disclosure directly leads out the signal electrodes from the side of the second matching layer. Compared with the traditional method of leading electrodes from the front of the emitting surface, the side electrode method avoids occupying the emitting surface, effectively expands the sound wave emitting area, and improves the transducer performance. At the same time, since the side operating space is relatively large, it avoids the problem of low product yield caused by limited operating space, and the side electrode method makes the upper surface of the product flatter and the dimensions more accurate.

This application discloses a wire bridge, an electrical control device, and HVAC equipment. The wire bridge is applied to the electrical control device, which has mating holes. The wire bridge includes a main body and a connecting part. A wire channel is formed within the main body, through which connecting wires are arranged in an orderly manner, making the wiring inside the electrical control box neater and helping to reduce improper contact between connecting wires and components of various circuit modules. The connecting part is connected to the side of the main body opposite to the opening of the wire channel. The connecting part is used to insert into the mating hole to fix the wire bridge inside the electrical control device. This facilitates the installation and replacement of the wire bridge and helps to reduce the size of the wire bridge along the width direction of the wire channel. In the electrical control device of this application, the wire bridge is installed in the electrical control box through the connecting part. The position of the wire bridge is independent of the circuit modules inside the electrical control box. When maintenance or replacement of circuit modules is required, there is no need to disassemble the wire bridge, effectively improving the maintainability and assembly convenience of the electrical control device.

The present disclosure relates to a fine bubble generation unit. More particularly, the present disclosure relates to a fine bubble generation unit, which is configured to enlarge the area of friction or collision of a fluid flowing inside a container or cause the fluid, while passing through the inside space of the container, to flow at different velocities in neighboring sections, so as to significantly improve, by a simple configuration, the generation capability and the sterilization power of fine bubbles having the micrometer or nanometer size.

The application provides an earphone shell assembly and an earphone. The earphone shell assembly comprises a first shell and a second shell. The first shell has a first interfacing surface, and the second shell has a second interfacing surface. Part of the first shell is recessed from the first interfacing surface along a first direction to form a step. Part of the second shell is protruded from the second interfacing surface along the first direction to form a protrusion. The protrusion is inserted into the step. The surface of the step along the first direction is recessed to form a glue storage groove. The earphone shell assembly provided by the application can be used for storing adhesive, can increase the amount of adhesive on the surface of the step along the first direction, is beneficial to improving the sealing effect after assembly, is beneficial to the forming of the step and the protrusion, reduces the wall thickness of the first shell and the second shell at the sealing position, and is further beneficial to reducing the size of the entire earphone.

This utility model discloses a car door assembly and a vehicle, relating to the field of vehicle component technology. The car door assembly of this utility model includes a sheet metal part, a mounting part, and a sealing part. The mounting part is connected to the sheet metal part and includes a first snap-fit ​​portion. The sealing part is used to abut against the door glass and includes a second snap-fit ​​portion connected to the first snap-fit ​​portion, allowing the sealing part to be detachably connected to the mounting part. By using the mounting part for connection, the sealing part is avoided from being directly connected to the sheet metal part, thus eliminating the need for a complex mounting structure on the sheet metal part, reducing the width requirements of the sheet metal part, effectively reducing the overall width of the sheet metal part, further promoting the narrowing design of the B-pillar of the car door, and improving the interior space and vehicle aesthetics.

The utility model relates to the field of vehicle-mounted auxiliary driving lamps, in particular to a novel optical structure of a vehicle-mounted auxiliary driving lamp with ultra-long range and side illumination, which comprises a lamp rear shell, a light-gathering light source plate fixing screw is connected inside the lamp rear shell through threads, and a light-gathering light source plate is arranged on the surface of the light-gathering light source plate fixing screw. The surface of the lamp rear shell is connected with a light source driving plate fixing screw through threads, and a light source driving plate is arranged on the surface of the light source driving plate fixing screw. Light rays are changed into parallel light spots through the convex lens, the effect of ultra-long-distance illumination can be achieved, the direct illuminating lamp is further provided with four floodlight cups, meanwhile, the requirement for short-distance large-angle and large-range illumination can be met, a set of LEDs are further arranged on the side face, light is reflected to the side front portion of a vehicle through the reflection cups on the side face, and therefore the effect of ultra-long-distance illumination is achieved. Therefore, the lighting range is wider, multiple lighting modes and multiple functions of one lamp are achieved, the overall size of the lamp is greatly reduced, and the fitting range of the lamp is enlarged.

The utility model relates to a fuel cell stacking tool. The device comprises a stacking bottom plate, a positioning assembly, an air tightness test plate, an adjusting knob, an adjusting platform and a crossbeam; the positioning assembly is composed of a positioning embracing column and a positioning rod; the stacking bottom plate is provided with the positioning embracing column, the positioning embracing column is connected with the positioning rod, and the positioning rod is connected with the crossbeam; the air tightness test plate is fixed on the stacking bottom plate through the positioning embracing column; one side of the positioning embracing column is provided with the adjusting platform, the adjusting platform is provided with the adjusting knob for adjusting the backward or forward movement of the positioning embracing column; the positioning embracing column and the stacking bottom plate are provided with the adjusting knob for adjusting the inclination direction of the positioning embracing column. In the utility model, each component is modularly designed, convenient to disassemble and assemble, and can be compatible with the size change of the small range of the electric pile and the stacking requirement of different numbers of sheets, thereby achieving the effect of saving time and labor in the research and development stage.

The application discloses a high-temperature and high-pressure combustion chamber spectrum characteristic transmission device based on a special optical fiber probe head, which comprises an optical fiber probe head, a light guide optical fiber, a light emitting characteristic analysis device and a cooling liquid pump; the optical fiber probe head comprises high-transmittance optical glass, a metal cooling sleeve and an optical flange; the high-transmittance optical glass can transmit ultraviolet-visible light with a wavelength of 100-760 nm; the metal cooling sleeve comprises a cylindrical sleeve and a connecting cap; the cylindrical sleeve is coaxially arranged on the outer periphery of the high-transmittance optical glass and is sealingly arranged in a probe head mounting hole; the light guide optical fiber can collect the ultraviolet-visible light transmitted through the high-transmittance optical glass and is connected with the light emitting characteristic analysis device; and the cylindrical sleeve and the connecting cap are both provided with cooling channels connected with the cooling liquid pump. The application can analyze the chemical reaction light emitting characteristics in the high-temperature and high-pressure combustion chamber in real time, is especially suitable for monitoring the spontaneous radiation characteristics of OH*, CH* and C2* groups generated in the combustion process, and thus can determine the reaction region and the reaction heat release.

The utility model discloses a one-way valve part, flow path switching subassembly, heat exchanger, air conditioning system and air conditioner, one-way valve part includes: one-way valve, first pipe section and second pipe section. One-way valve includes first casing, second casing and valve core, and first casing and second casing are directly welded and are connected and are limited to one-way flow channel, is equipped with the export on first casing, is equipped with the import on second casing, and the valve core is located in one-way flow channel, and one-way valve is by import to export one-way conduction, first pipe section one end is connected in the export place, and first pipe section is connected with first casing through first soldering material and is welded, and second pipe section one end is connected in the import place, and second pipe section is connected with second casing through second soldering material and is welded. According to the one-way valve part of the utility model, the quality and the yield of one-way valve part are high, and production efficiency is high and cost is low.

The utility model relates to the technical field of connector, specifically relates to a socket connector and battery pack. The battery pack includes battery pack casing and the socket connector fixed on the side wall of battery pack casing, and the socket connector includes socket casing and shield cover, and the socket casing has the installation surface and the plug-in cavity, and the plug-in cavity is equipped with the plug-in convex part, and the plug-in convex part is equipped with the plug-in terminal, and the shield cover includes the main cylinder of sleeveing in the plug-in convex part, and the one end of main cylinder is equipped with the everted edge near the bottom of plug-in cavity, and the end of everted edge is equipped with the shield wear -out part away from main cylinder, and the socket casing is equipped with the shield through -hole through plug-in cavity and installation surface, and the shield wear -out part is arranged in the shield through -hole and the tail end of shield wear -out part is equipped with the shield contact part, and the installation surface is equipped with the sealing structure in the periphery of shield wear -out part. The shield cover of step structure can reduce the size of socket connector, and avoid occupying too much space.

The application belongs to the technical field of peripheral nerve surgery instruments and amputation postoperative complication prevention, and discloses a device for collecting and preparing autologous peripheral nerve adventitia during amputation and a use method thereof. In view of the problems of poor neuroma prevention effect, complicated operation, existence of rejection risk of materials and lack of standardized collecting and preparing instruments for autologous nerve adventitia in the prior art, the application comprises a partitioned tray base and matched adventitia strippers, a miniature negative pressure flattening module, a color mark cutting template group, a transfer forceps and a broken end sealing auxiliary ring clamp. The adventitia strippers integrate the functions of nerve clamping, longitudinal incision and annular stripping, can be adapted to nerves with diameters of 3-15 mm, realize lossless collection of adventitia and standardized patch preparation. The whole process operation of the application only needs 15-20 minutes, has no immune rejection of autologous waste nerve adventitia, and can effectively prevent neuroma formation and phantom limb pain.

A kind of measuring tool for fan rotor blade tip end face profile, including bottom plate, vertical support block is provided with in the top surface of bottom plate one end, the other end is provided with arc block;Vertical support block is provided with mounting bracket for clamping tenon of blade to be measured on it, after clamping, make the vertical state of corresponding engine axis of blade to be measured;The end face of arc block away from support block is set as arc surface;One end of arc block is provided with opposite table column, and one side of opposite table column is set as opposite table arc surface;The axis of arc surface, opposite table arc surface and the arc surface of the theoretical profile of blade tip of blade to be measured coincide with engine axis;Slidingly configured with slider on the arc surface of arc block, the top of slider is provided with table frame;Dial gauge is provided on the top of table frame, and the dial of dial gauge is towards the blade tip of blade to be measured.Slider slides on the arc surface of arc block, so by reading the indicated number of dial gauge, the processing size of blade tip full arc surface can be obtained.

This application provides a battery cell and a battery pack, relating to the field of battery technology. The battery cell includes: a housing, an explosion-proof valve disposed within the housing, and an electrode assembly, a first insulating layer, an insulating film, and multiple support structures disposed within the housing. The first insulating layer is connected to the side of the electrode assembly near the explosion-proof valve. The insulating film encloses the electrode assembly and the first insulating layer. A first vent hole penetrating along a first direction is provided on the side of the insulating film near the explosion-proof valve. The first insulating layer, the first vent hole, and the explosion-proof valve are arranged opposite to each other along the first direction. Multiple support structures are located between the insulating film and the housing along the first direction, with adjacent support structures spaced apart. The support structures and the first vent hole are spaced apart along a second direction, and the explosion-proof valve and the support structures are spaced apart along the second direction. Based on the above structural design, the safety of the battery cell is improved.