6055 results about "Top cap" patented technology

Disclosed is a magnetic building block, including a main housing, a top cover, a bottom cover, and magnets. The main housing is cuboid-shaped, the main housing is provided with a cavity, and an upper opening and a lower opening are formed on a pair of opposite faces of the main housing. The top cover is detachably connected to the upper opening, the bottom cover is detachably connected to the lower opening, and a mounting groove is formed on either of the top cover and the bottom cover. The magnet is arranged inside the mounting groove. Structural design of the main housing of the magnetic building block is simplified, the top cover and the bottom cover are detachably connected to the main housing in an inserted manner, and the magnets are uniformly arranged at the four right-angle corners of the top cover and the bottom cover.

The invention provides a top cover assembly, a battery and electric equipment. Comprising lower plastic and a supporting piece. The lower plastic comprises a lower plastic body and a central boss which are connected, the lower plastic body comprises a first surface and a second surface, the central boss protrudes relative to the second surface, and the central boss comprises a bottom surface and a first side surface connected between the bottom surface and the second surface; the lower plastic is provided with a mounting groove and a plurality of first exhaust holes formed at intervals, the mounting groove is located in the lower plastic body and the center boss, the first exhaust holes are located in the first side face and the bottom face, and at least one first exhaust hole communicates with the mounting groove; the supporting piece is positioned in the mounting groove and is supported between the lower plastic and the top cover; the mounting groove comprises a first side wall, a first air channel is formed between the first side wall and the supporting piece, the first air channel is communicated with the at least one first exhaust hole, and the size of the first air channel in the length direction of the lower plastic is gradually reduced in the direction from an opening of the mounting groove to the bottom wall. According to the technical scheme, the problem of difficulty in exhausting during thermal runaway of the battery cell can be solved.

The invention relates to the technical field of rotor pump machining, and discloses a rotor pump machining and welding device which comprises a base, a shell is fixedly connected to the periphery of the base, a top cover is fixedly connected to the top of the shell, a welding mechanical arm is movably installed at the bottom of the top cover, and a clamping and supporting mechanism is arranged at the top of the base. A feeding and discharging mechanism is arranged on the inner wall of the shell, a protection plate is slidably connected to the top of the base, a partition plate is fixedly connected to the top of the base, and additional assemblies are installed on the base and the partition plate and used for achieving additional effects except for basic functions of the base and the partition plate. The three clamping blocks are matched with one another and synchronously move in the radial direction through the guide grooves in the three clamping blocks, the axis of a workpiece can be automatically aligned with the axis of the main shaft without manual adjustment, the operation is simple, meanwhile, the effect of rapidly clamping the workpiece can be achieved, and the production efficiency is improved.

The invention provides a top cover assembly, a battery and an energy storage device. Comprising a top cover, lower plastic, a pole and a sealing ring, wherein the top cover is provided with a first hole; the lower plastic and the top cover are arranged in a stacked mode, the lower plastic is provided with a second hole and a groove, the second hole penetrates through the lower plastic in the thickness direction of the lower plastic and is coaxially arranged and communicated with the first hole, the inner wall of the second hole is matched with part of the surface, facing the lower plastic, of the top cover to form a first step structure, and an opening of the groove is located in the surface, deviating from the top cover, of the lower plastic. The groove is located on the periphery of the second hole and communicated with the second hole, and the side wall of the groove and the bottom wall of the groove are matched to form a second step structure; the pole penetrates through the first hole and the second hole; the sealing ring is arranged on the pole in a sleeving mode and located in the first hole, the second hole and the groove, the sealing ring located in the second hole abuts against the first step structure, and the sealing ring located in the groove abuts against the second step structure. According to the technical scheme, conduction of the top cover and the pole can be avoided, and the safety performance of the electrode assembly is guaranteed.

The invention discloses an ultra-thin high-energy-storage-density inductor which comprises a shell, a cover plate arranged on the upper portion of the shell, cooling fins fixedly installed in the cover plate, an inductor body arranged in the shell, a shell cover fixedly connected to the bottom of the cover plate and a connecting assembly arranged on one side of the shell. The connecting assembly comprises a dismounting and mounting mechanism arranged on the upper portion of the shell, a heat dissipation mechanism is arranged on the side portion of the shell, a damping mechanism is arranged in the shell, the top of a positioning block is fixedly connected with a cover plate, a clamping rod movably penetrates through a movable groove to be clamped with a clamping groove, one end of a second spring is fixedly connected with a movable block, and the other end of the second spring is fixedly connected with a clamping groove. The outer end of the connecting rod is movably connected with the shell. The problems that a top cover of an existing device is inconvenient to disassemble manually, so that the interior of an inductor is inconvenient to overhaul and locate manually, and subsequent use of the device is affected are solved.

The invention provides a top cover assembly, a battery monomer, a battery and a power utilization device, and relates to the technical field of batteries, the top cover assembly comprises a top cover sheet, a pole and a first insulating piece, the top cover sheet is provided with a first surface, a second surface and a first through hole, the pole comprises at least one first connecting part and at least two second connecting parts, the first connecting part is arranged on one side, provided with the first surface, of the top cover sheet and is used for being connected with an electric connecting piece, and the second connecting part is used for being connected with a tab; the first insulating part is fixedly connected to the pole and the top cover piece and comprises a first insulating part, a second insulating part and a third insulating part which are connected, the first insulating part is arranged on the side, with the second face, of the top cover piece, the second insulating part is arranged between the hole wall of the first through hole and the second connecting part of the pole, and the third insulating part is arranged on the side, with the first face, of the top cover piece; on a dummy plane perpendicular to the thickness direction of the top cover sheet, the orthographic projection of the first insulating part is overlapped with the orthographic projection of the top cover sheet.

The battery comprises a shell, a top cover assembly and a core bag, the top cover assembly is arranged at one end of the shell, a containing cavity is defined between the top cover assembly and the shell, the core bag is arranged in the containing cavity, the top cover assembly comprises a pole, a groove is formed in the end, facing the containing cavity, of the pole, the groove is provided with an inner wall, and a groove opening of the groove faces the core bag. The core package comprises a tab, and the free end of the tab is fixedly connected with the inner wall. The tabs are directly connected to the poles, and electrical connection between the core package and the poles is realized without using a switching piece, so that the structure is simplified, and the space utilization rate in the battery is improved. As the tabs are directly welded with the poles, only one welding procedure needs to be completed when the battery is assembled. Welding procedures are reduced, and assembling efficiency is improved. And moreover, the resistance of the whole battery can also be reduced due to the omission of an adapter sheet.

Ladders and ladder accessories for articulating ladders are mountable to an upper rung of the ladder and can remain attached to the upper rung while the ladder articulates between collapsed, straight, and step ladder configurations without binding or engaging other rungs. The accessories can be top caps configured to hold tools and parts while the user climbs and stands on the ladder. The accessories can be removed from the ladder without damage to the accessory or the ladder, thereby enabling retrofitting ladders with the accessory or moving the accessory to different rungs or positions on the same ladder. Some accessories can have more than one body portion, and a portion can therefore pivot relative to another portion to enlarge the working platform offered by the accessory and to provide additional surfaces for temporarily supporting the accessory parts on the ladder rungs.

The invention relates to the technical field of laser cutting, and provides a plate and pipe integrated laser cutting machine with an automatic adjusting tool, which comprises a workbench, a top cover arranged on the top of the workbench, a laser generator arranged on one side of the top cover, a driving assembly arranged in the workbench, and a self-adaptive assembly arranged on the workbench, an automatic feeding assembly is arranged on the top cover, a fourth arc-shaped groove is formed in the position, on one side of the self-adaption assembly, of the workbench, and a conveying mechanism is arranged at the position, at the bottom of the fourth arc-shaped groove, of the workbench. Efficient and stable clamping of a pipe is achieved through the self-adaption assembly, it is ensured that a fixing block is precisely separated and fits the shape of the pipe through cooperation of a V-shaped rod and a third spring, meanwhile, rolling wheels on a cylinder roll in the pipe conveying process to reduce friction, smooth movement of the pipe is ensured, and in addition, the fixing block, a gear and clamping teeth are driven by a motor to move stably. The three fixing block sets can be synchronously driven to rotate, and continuous and accurate cutting of the pipes is achieved.

A safety barrier system including a plurality of barrier assemblies, each barrier assembly having a barrier panel assembly including a rectangular barrier mesh supported by an upper edge binding member, a lower edge binding member, a pair of left stiffeners and a pair of right stiffeners wherein the pair of left stiffeners capture a left edge of the rectangular barrier mesh and the pair of right stiffeners capture a right edge of the rectangular barrier mesh. Each barrier assembly includes a barrier support pole having an upper pole end, a lower pole end opposite the upper pole end, the lower pole end engageable with a ground insert for allowing rotation of the barrier support pole and opposing first and second retention slots, each of the first and second retention slots extending from the upper pole end to the lower pole end, the first retention slot parallel to the second retention slot. Each barrier assembly includes a top cap for engaging the upper pole end and securing at least one of the pair of left stiffeners or the pair of right stiffeners in one of the first or second retention slot and a panel stop engaged with the first and second retention slot along a lower portion of the barrier support pole, the panel stop for supporting the lower edge binding member of the barrier panel assembly.

The invention discloses multifunctional lead brick extrusion equipment with a replaceable mold, relates to the technical field of lead processing, and aims to solve the problems of production stagnation and economic loss caused by idle equipment due to long consumed time of the whole process when the mold is replaced in the prior art, the multifunctional lead brick extrusion equipment comprises a base, and the top of the base is fixedly connected with a plurality of guide frames; the outer wall of the guide frame is slidably connected with a pair of symmetrically arranged extrusion plates, the bottom of the extrusion plate on the lower side is fixedly connected with the top of the base, the top of the guide frame is fixedly connected with a top cover, and the bottom of the top cover is fixedly connected with a hydraulic rod; and the other end of the hydraulic rod is fixedly connected with the top of the extrusion plate on the upper side, a pair of piston cylinders are arranged on the top of the base, and corresponding molds are arranged on the opposite faces between the extrusion plates. The method has the advantage that the idle time of equipment caused by die replacement is greatly shortened.

The invention relates to a wind turbine nacelle (2, 40) configured for mounting on a wind turbine tower (3), the nacelle comprising a top cover comprising multiple cover elements (41, 42, 43, 44), of which at least one is a dome cover element (44) comprising a dome-shaped part (45); wherein said nacelle has a second configuration in which said dome-shaped part (45) protrudes upwards and a first configuration in which said dome-shaped part (45) protrudes downwards.

The invention provides an end cover assembly, an energy storage device and electric equipment. The end cover assembly comprises a top cover, the top cover is provided with a first surface and a second surface which are oppositely arranged, the top cover is further provided with a groove, and the groove is located in the second surface; and the lower plastic cement is arranged on the second surface side of the top cover, the lower plastic cement comprises a plastic cement body and a convex column, the convex column is convexly arranged on one side, facing the top cover, of the plastic cement body, and the convex column is accommodated in the groove and is connected with the top cover.

The container comprises a container body, top covers and a sealing structure, the container body comprises a top plate, a feeding port is formed in the top plate, the top covers are connected to the top plate in a pivoted mode, the top covers can be closed to the feeding port in an openable mode, the number of the top covers is at least two in the first direction, and the pivoting directions of all the top covers are the same. The top cover comprises a cover plate body and a frame structure arranged on the outer periphery of the cover plate body. The frame structure comprises two transverse parts arranged in the first direction and two longitudinal parts arranged in the second direction. Sealing lap joint between the top covers and the top plate is achieved through the transverse parts, sealing lap joint between the adjacent top covers is achieved through the longitudinal parts, a sealing waterproof area is formed, the sealing waterproof structure is simplified, water can be rapidly drained, rainwater is prevented from flowing into the box body along the joints of the adjacent top covers, goods are prevented from being affected with damp or damaged by water, and the service life of the box body is prolonged. And the sealing performance of the top cover is ensured.

The utility model discloses a pneumatic vacuum feeding machine, and relates to the field of feeding machines. The pneumatic vacuum feeding machine further comprises a mounting plate arranged in a top cover in the feeding machine body, and a plurality of penetrating openings are formed in the mounting plate circumferentially at equal intervals. The filter cartridge is rotationally connected to the position, close to the penetrating opening, of the lower end of the mounting plate, and filter holes are formed in the side wall and the bottom of the filter cartridge; the fan blade group is arranged in the filter cartridge, and the filter cartridge is rotationally connected with the mounting plate, so that when airflow passes through the filter cartridge, the filter cartridge can be driven by the fan blade group to rotate to generate centrifugal force, and then part of powder attached to the cartridge wall of the filter cartridge can be thrown away under the action of the centrifugal force; therefore, the smoothness that airflow penetrates through the filter cartridge to be discharged is guaranteed, the phenomenon that negative pressure suction of materials is affected due to the fact that filter holes of the filter cartridge are blocked is avoided, and the stability of vacuum feeding of the materials is effectively guaranteed.

The invention relates to the technical field of batteries, and provides a top cover assembly, a battery cell and a battery pack, the top cover assembly comprises a top cover body, a pole and an explosion-proof valve; a first through hole and a second through hole which penetrate through the top cover body are formed in the top cover body, and the first through hole and the second through hole are arranged at an interval in the length direction of the top cover body; in the area where the second through hole is located, the top cover body is bent to form a boss protruding towards one side. The second through hole is a countersink hole and comprises a countersink part and a through hole part which are coaxially arranged, and the countersink part is communicated with the outer side of the boss; the pole penetrates through the first through hole and is electrically connected with the tab of the battery cell; the anti-explosion valve is installed on the inner wall of the through hole part. According to the invention, the mechanical strength of the battery cell can be improved, the heat dissipation efficiency of the battery cell is improved, the use temperature of the battery cell is controlled, and the anti-explosion valve is mounted on the inner wall of the through hole part in a settling manner, so that the pole and the anti-explosion valve are effectively protected, and the safety performance of the battery cell is improved.

The invention provides a cover plate assembly and a battery cell. The cover plate assembly comprises a top cover sheet, a fixing ring, an anti-explosion valve, a sealing element and a pressing ring, the top cover piece is provided with an anti-explosion hole penetrating in the first direction, and the inner wall of the anti-explosion hole is provided with a first limiting step. The fixing ring is fixedly connected with the top cover piece, an assembly space communicated with the explosion-proof hole is formed between the fixing ring and the top cover piece, and a notch which is sunken inwards in the radial direction of the fixing ring is formed in the inner edge of the fixing ring; the anti-explosion valve is positioned in the anti-explosion hole and is pressed on the first limiting step; the sealing element is positioned in the anti-explosion hole and is pressed on the anti-explosion valve; the outer edge of the pressing ring is provided with a stopping body extending outwards in the radial direction of the pressing ring. When the backstop body directly faces the notch in the first direction, the pressing ring can pass through the fixing ring; and when the stopping body and the notch are staggered, the fixing ring stops the pressing ring, so that the pressing ring is clamped in the assembly space. The problem that the explosion-proof valve of the battery cell cannot be disassembled after being assembled in the prior art is solved.

The invention relates to the technical field of cell terminal assemblies, and discloses a modular terminal assembly and top cover assembly.The modular terminal assembly and top cover assembly comprises an assembly ring, an injection molding insulating part and a pole which are connected into a whole, the assembly ring is sequentially provided with an annular connecting part, a transition part and a supporting part from bottom to top, and the injection molding insulating part is arranged between the assembly ring and the pole in an injection molding mode; the injection molding insulating part upwards bypasses the supporting part and is glued at the outer side position of the transition part; a plurality of first notches are formed in the inner side of the supporting part in the circumferential direction. A pole flange is arranged at the bottom end of the pole; the outer diameter of the pole flange is greater than the inner diameter of the supporting part; according to the modularized terminal assembly structure, a pole riveting connection mode is canceled, and the prefabricated terminal assembly and the assembling groove are directly subjected to laser welding, so that the installation process is simplified. In addition, an upper pressing plate is omitted in the modularized terminal assembly structure, the problem that the number of parts is too large at present is solved, and the cross section overcurrent capacity is improved.

The present application relates to a top cover assembly (100), a battery cell, a battery, and an assembly method for a top cover assembly. The top cover assembly (100) comprises: a cover plate (10) and a lower insulating member (40), the cover plate (10) having least two terminal holes (11), the cover plate (10) comprising a first surface (101) and a second surface (102), and the lower insulating member (40) being arranged on the second surface (102); at least two terminals (20) and at least two sealing rings (30), the terminals (20) corresponding to the terminal holes (11) on a one-to-one basis, each terminal (20) comprising a main body (21) and an annular flange portion (22) arranged at one end of the main body (21), each main body (21) being sleeved with a sealing ring (30) and inserted into the corresponding terminal hole (11), and each flange portion (22) being sealed and pressed against the first surface (101) of the cover plate (10) by means of the sealing ring (30); and at least two limiting members (50), each of which is insulated and isolated between the corresponding main body (21) and terminal hole (11) and is configured to enable the corresponding terminal (20) and terminal hole (11) to be relatively fixed.

The utility model relates to the technical field of batteries, and discloses a top cover assembly and a battery. The top cover assembly comprises a cover group assembly and a top cover assembly, the cover group assembly comprises a cover plate and a pole, the cover plate is connected with the opening of the shell, a first through hole is formed in the cover plate, one end of the pole is positioned on the inner side of the cover plate and is electrically connected with the tab of the battery cell, and the other end of the pole extends out of the outer side of the cover plate from the first through hole; the top cover assembly comprises a first connecting piece, a PTC and a top cover body which are sequentially connected in the direction away from the shell, and the first connecting piece is located above the cover plate and electrically connected with the pole. By adopting the arrangement mode, the top cover assembly can be connected with the opening of the shell by adopting a full-sealing structure, so that the battery has good sealing performance; by integrating the PTC, the over-current protection function in the assembling process of the top cover assembly can be achieved, and therefore the safety and reliability of the assembling process of the top cover assembly are guaranteed.

The utility model discloses a hydropower station volute pressure maintaining pouring monitoring and early warning device which comprises a volute pressure maintaining pouring assembly, and a monitoring and early warning assembly is arranged on the peripheral side of a volute top cover piece and located on the outer wall of a volute body. The monitoring and early warning assembly comprises a top cover outer sleeve ring arranged on the peripheral side of the volute top cover part in a sleeving mode, a movable arc-shaped mounting plate with the arc-shaped movement adjusting position on the outer wall of the volute body and a sliding block support slidably installed on the outer wall of the movable arc-shaped mounting plate. A first displacement sensor for monitoring displacement of the volute body after concrete pouring is arranged on the outer wall of the sliding block support, and second displacement sensors for monitoring the displacement condition of the seat ring piece are arranged on the inner walls of the upper side and the lower side of the seat ring piece correspondingly. A stress protection adjusting assembly used for resetting and adjusting the displaced volute body is further arranged outside the peripheral side of the volute body, and the terminal of the stress protection adjusting assembly is used for applying force to push the volute body to reset.

The ladder safety device may comprise a top cap cover and a top step guard. The ladder safety device may be a safety device configured for use on a step ladder. The top cap cover may be operable to cover a top cap of the step ladder and may be adapted to prevent a worker from stepping onto the top cap. The top step guard may be operable to block access to a top step of the step ladder and may be adapted to prevent the worker from stepping onto the top step. The top cap cover may be configured to hold tools and supplies. The top cap cover and the top step guard may be retained on the step ladder by a plurality of straps.

The heat dissipation top cover structure comprises a top cover plate, the two ends of the top cover plate are provided with a positive pole and a negative pole, the bottom end of the top cover plate is provided with lower plastic, and the heat dissipation top cover structure is characterized in that connecting pieces are arranged between the positive pole and the lower plastic and between the negative pole and the lower plastic, and the positive pole and the negative pole are connected with the connecting pieces. Heat conduction ceramic is arranged between the top cover plate and the lower plastic and located on the inner side of the connecting piece, one end of the heat conduction ceramic is connected with the connecting piece, and the top end of the heat conduction ceramic is connected with the top cover plate. The heat-conducting ceramic is arranged between the top cover sheet and the lower plastic, so that the heat-conducting ceramic is in contact with the connecting sheet and the top cover plate, heat on the connecting sheet is conveniently transferred to the top cover sheet through the heat-conducting ceramic, the problem that heat in the battery cell is isolated and cannot be released is solved, the safety of the battery cell is improved, and potential safety hazards are reduced.

The invention discloses an adjusting valve with a flow limiting buffer structure, and relates to the technical field of valves, the adjusting valve comprises a valve body, the top of the valve body is fixedly connected with a top cover, the top of the valve body is fixedly connected with a bottom cover, the top of the top cover is slidably connected with a valve rod in a penetrating mode, and the bottom end of the valve rod is fixedly connected with a conical valve element; the inner wall of the valve body is fixedly connected with a partition plate, and a conical through hole matched with the conical valve element is formed in the partition plate. Impurities adhering to the outer surface of the conical valve element and the inner wall of the conical through hole can be automatically cleaned in the use process of the adjusting valve, normal use of the adjusting valve is prevented from being affected, when the material pressure is increased, the pressure can be buffered through the arranged flow limiting buffering mechanism, flowing of materials can be adjusted and limited, and the service life of the adjusting valve is prolonged. Therefore, fine control over the fluid flow is achieved, and impact and vibration caused by too high flow speed are avoided.

The utility model relates to water supply equipment, and relates to the technical field of household appliances. According to the support, the support comprises a base, a top cover and a back plate, the top cover and the base are arranged in a spaced mode, the back plate is connected with the base and the top cover, a water outlet is formed in the top cover, and a bearing face used for bearing a water container is arranged on the base. The bearing surface is arranged to enable the top of the water container to be obliquely arranged towards the back plate relative to the bottom of the water container; the water level detection assembly is arranged on the back plate and close to the top end of the water container, and the water level detection assembly is used for detecting the water level in the water container. The refrigerator has the beneficial effects that the water level detection assembly is arranged to achieve detection of the water amount in the water container, and then the phenomenon that water flows around in the refrigerator can be improved.

The invention relates to the technical field of cable or wire installation, and discloses a bus duct, which comprises a shell, a heat dissipation plate and a conductor, and is characterized in that the shell comprises a top cover part, a partition plate part and a base part, the partition plate part is provided with a heat dissipation cavity penetrating through the upper side and the lower side of the partition plate part, the top cover part is provided with a first through hole, and the base part is provided with a second through hole; rainwater can pass through the first through hole and the second through hole; the heat dissipation plates are arranged on the two sides of the partition plate part, and two containing cavities are formed between the heat dissipation plates and the shell. The number of the conductors is four, the four conductors are divided into two groups and penetrate through the two containing cavities in a one-to-one correspondence mode, the two conductors in each group are the first conductor and the second conductor respectively, one side of the first conductor is attached to the heat dissipation plate, and one side of the second conductor is attached to the outer wall of the partition plate part; the shell further comprises grounding parts which are arranged at the two ends of the partition plate part and located between the two sets of conductors. The heat dissipation function of the bus duct can be improved, the use effect of the bus duct is ensured, and the bus duct is prevented from being damaged by rainwater.

The utility model provides a top cover subassembly, battery cell and battery pack, the top cover subassembly includes cover plate, pole post plate and sealant, the cover plate is equipped with the through hole, the through hole is used for intercommunication with the inside of battery cell, pole post plate is installed on the cover plate and covers the through hole, and the pole post plate is equipped with the first glue overflow groove at the position corresponding to the through hole, the notch of the first glue overflow groove faces towards the through hole, and the sealant is arranged in the first glue overflow groove. The sealing glue is clamped between the cover plate and the pole column plate, and the first glue overflowing groove is partially filled with the sealing glue. According to the top cover assembly provided by the utility model, the technical problem that the sealant in the existing top cover assembly is easy to overflow through the through hole in the cover plate can be solved.

A platform assembly is provided with at least one foldable and deployable handle. The handle can be operated to a storage position lying between upper and lower surfaces of the upper platform of the assembly. When deployed, the handle can provide a handhold, top cap, and other features to users who are on the upper platform or who are climbing onto the upper platform. Leg assemblies of the platform can be operable between folded and deployed states, and feet of the leg assemblies can be deployed to widen the stance of the platform or folded to reduce the overall width and volumetric envelope within which the platform resides.

The invention discloses a concrete depth performance detection method, and relates to the technical field of concrete performance detection.The device comprises a shell, a top cover, a combined pressurizing mechanism, a combined supporting mechanism, a water inlet pipe, a camera, a controller and a high-pressure water supply device; the method comprises a compressive strength test mode, a permeability resistance test mode and a test piece permeability detection mode after different pressure loads. Through the design, observation and research on permeability change of the test piece after loading can be realized, and data reference is provided for actual engineering. Meanwhile, the device disclosed by the invention can be used for carrying out compressive strength test and permeability resistance test, so that the applicability of the device is effectively improved, the application range is widened, and convenience is provided for in-depth research of concrete performance.

The utility model relates to the technical field of batteries, in particular to a top cover assembly, a battery monomer and a battery assembly. The top cover assembly comprises an insulating sheet, a top cover sheet, a negative electrode assembly and a positive electrode assembly, the insulating sheet comprises a first through hole and a second through hole, the top cover sheet comprises a negative electrode part corresponding to the first through hole, a positive electrode part corresponding to the second through hole and a remaining main body part, and the negative electrode assembly is installed on the negative electrode part; the positive electrode part comprises at least one convex part which protrudes towards the direction far away from the insulating sheet relative to the main body part, and the convex part forms the positive electrode assembly; the end surface of one end, far away from the insulating sheet, of the convex part is flush with the end surface of one end, far away from the insulating sheet, of the negative electrode assembly; and the outer convex part and the main body part are integrally formed. The outer convex part formed by stamping the top cover plate is used as the positive electrode, and a sealing ring, a positive electrode terminal, positive electrode upper plastic and other parts in a conventional structure are omitted, so that the cost is greatly reduced.