29results about How to "Large flow area" patented technology

The application belongs to the technical field of batteries, and discloses a battery cover plate and a battery. The battery cover plate comprises a cover plate body and a pole module. The cover plate body comprises a mounting plate body, an extension plate body and a protection plate body. The two sides of the mounting plate body are provided with inclined extension plate bodies. The low end of the extension plate body is connected with the mounting plate body, and the high end is connected with the protection plate body which is parallel to the mounting plate body. The junction and the middle part of the mounting plate body and the extension plate body are provided with protection bosses. The installation part is formed between the adjacent protection bosses. The protection boss is a hollow boss structure. The pole module is insulatedly connected in the installation part and on the extension plate body. The part of the pole module which is located outside the cover plate body is lower than the protection plate body. By making the part outside the pole module lower than the protection plate body, the space outside is reduced to improve the battery module assembly rate, and the damage caused by knocking is avoided. The space inside the protection boss and below the extension plate body is utilized to increase the volume of the pole group to improve the battery capacity. The multi-pole structure effectively improves the overcurrent capacity.

The utility model discloses an aerobic tank structure for preventing suspended filler from floating upwards, which is characterized in that an overhaul well is arranged on the upper surface of an aerobic tank body, a frame intercepting net is vertically arranged at the overhaul well, the lower part of the frame intercepting net extends into the aerobic tank body, a connecting seat is arranged on one side of the lower part of the frame intercepting net, and the connecting seat is connected with one end of a hose; the device is reasonable in structure, gas in the tank body of the aerobic tank moves upwards through the interior of the frame intercepting net and is communicated with the outside atmosphere through the holes of the stainless steel cover plate, and therefore the problem that the air in the tank body of the aerobic tank cannot penetrate through the polyurethane filler, and the air in the tank body of the aerobic tank cannot penetrate through the hole of the stainless steel cover plate can be solved. And the arrangement and installation of the frame interception net and the hose do not need to adjust the configuration of other functional pipeline systems, that is, the original pipeline system is not specially limited, the installation is convenient and fast, and the problem of power consumption is solved.

The utility model relates to an oil-submerged pump and a motor connecting seat for the oil-submerged pump. The motor connecting base for the oil-submerged pump comprises a base body, a circuit channel and a plurality of oil way channels, and the circuit channel and the oil way channels are arranged in the base body. Wherein at the first end of the seat body, the plurality of oil way channels are arranged around the periphery of the circuit channel; and at the second end of the seat body, the plurality of oil way channels are converged at one position and are arranged in parallel and at intervals with the circuit channel. The motor connecting base can be suitable for a brand new pump pipe arrangement mode, the overflowing area of an oil way pipe can be effectively increased, the on-way resistance of oil flowing can be effectively reduced, the operation power of the oil-submerged pump can be reduced, the oil-submerged pump can output more oil under the same power consumption, and the circuit pipe can be conveniently maintained and checked.

The utility model discloses a kind of backflow-preventing self-closing check valve, including valve body, the inlet and outlet are opened in the valve body, buffering cavity and installation cavity are arranged in the valve body, the inlet is communicated with the buffering cavity, the outlet is communicated with the installation cavity, the buffering cavity is connected with installation cavity by passageway mouth, further include pressing plate and filter screen bucket, the pressing plate is set in the installation cavity, the pressing plate is used to block the passageway mouth, the filter screen bucket is set in the buffering cavity, the volume of the filter screen bucket is less than the volume of buffering cavity, the bucket mouth of the filter screen bucket is towards the passageway mouth, the bucket bottom and part of lateral wall of the filter screen bucket are medium flow channel.This kind of check valve has following beneficial effects: by adopting the bucket bottom and part of lateral wall of filter screen bucket can be as the passageway of medium flow, can increase flowing area, reduce the probability that foreign matter in medium blocks filter screen bucket, improve the reliability when filtering.

The utility model relates to the technical field of lithium ion batteries, in particular to a battery cover plate and a battery monomer. The battery cover plate comprises a pole, a cover plate body and a connecting piece, the pole comprises a first step part, a second step part, a third step part and a fourth step part of which the cross sectional areas are sequentially reduced; the second step part and the third step part penetrate through the through hole of the cover plate body, and the fourth step part is welded with the hole wall of the welding hole of the connecting piece; the cover plate body is limited between the first step part and the connecting piece; the cross sections of the first step part, the second step part, the third step part and the fourth step part are elliptical or waist-shaped; the cross section area of the fourth step part is not less than 6mm < 2 >. According to the battery cover plate and the battery monomer, the problems that the over-current requirement and the strength requirement cannot be met due to the fact that most of the pole columns of the existing battery cover plate are circular, and the performance of the battery is easily damaged due to riveting vibration due to the fact that the pole columns are connected with the riveting blocks in a riveting manner are solved.

The present application relates to the technical field of cooling device, and discloses an intelligent temperature control circulating cooling device for phase modulation camera, which is provided with a circulating water treatment box, when the temperature of the phase modulation camera is low, the circulating water treatment box sends the used cooling water to the cooling plate for secondary use, effectively improving the recycling of the cooling water, when the temperature of the phase modulation camera is high, the air temperature between the phase modulation camera and the cooling plate rises, the first flow groove expands by heat at this time, the second flow groove is driven to move by the lever mechanism when the first flow groove expands, the corrugated structure is in the elongated state at this time, the first flow groove and the second flow groove have the primary cooling water flowing in the inside, the flowing area of the primary cooling water is increased at this time, the flowing area of the secondary cooling water is reduced, which promotes the cooling device to cool the air faster, the cooled air cools the phase modulation camera, and the cooling device adjusts the cooling intensity in time according to the temperature change of the air around the phase modulation camera, realizing the precise distribution of the cooling water.

This utility model relates to the field of hydraulic machinery, specifically to a mechanical pump. A conical filter screen is located at the inlet, providing a large flow area and high interception efficiency, effectively blocking large particles of impurities in the water and preventing them from entering the pump body and causing damage or blockage. When water flows through the filter screen, impurities gradually accumulate on its surface. If not cleaned promptly, this leads to a slower flow rate and increased pressure within the mechanical pump. The microcontroller receives data from sensors, makes judgments, and controls an electric ball valve to open for flushing. Furthermore, the water flow from the flushing inlet drives a flushing turbine, which in turn drives a cleaning brush to clean the filter screen. This invention solves the problems of existing mechanical pumps being prone to clogging, requiring manual cleaning after clogging, which increases water flow resistance, reduces pump efficiency, and can even cause shutdowns.

The application discloses a side push cover plate device, which comprises the following parts: an outer plate structure connected with the outer plate of a ship body in the region; a guide groove cylinder connected with a side push cylinder; a box-shaped shell arranged on the inner side of the outer plate structure and the side of the guide groove cylinder; cover plate blades installed on the mouth of the guide groove cylinder and divided into several pieces according to the curved surface line type of the ship body in the region, which are completely attached to the curved surface line type of the ship body in the closed state and provide flow area for the side push in the open state; an executing mechanism installed on the reinforcing structure of the box-shaped shell, which effectively transmits torque and controls the opening and closing of the cover plate blades; and a locking mechanism installed on the support of the reinforcing structure of the box-shaped shell, which is one-to-one corresponding to the executing mechanism and controls the locking of the opening and closing state of the cover plate blades. The application provides the largest possible flow area for the side push and the largest efficiency of the side push when the side push is used, closes the cover plate to keep the curved surface line type of the ship body continuous and smooth, reduces the ship resistance, lowers the energy consumption of navigation and effectively suppresses the air bubbles at the mouth of the side push tunnel when the side push is not used.

The utility model relates to battery technology field, concretely relates to a battery device, and the battery device includes: first component and second component, welding assembly is arranged between first component and second component, and simultaneously connects first component and second component, welding assembly is provided with a plurality of welding parts in first component, and the difference h between the penetration of adjacent two welding parts has, the range of difference h is between 0.1mm < h < 1.0mm. This embodiment sets up a plurality of welding parts, compared with single area's welding part, can obviously improve the overcurrent area. Moreover, this embodiment carries out the differentiation adjustment to the penetration of adjacent two welding parts, can reduce the conduction efficiency of heat from the deep fusion area to the shallow fusion area, avoids the heat when welding too big, can obviously improve the welding quality and welding strength.

This invention discloses a welding method for current collectors in cylindrical batteries, relating to the field of new energy battery technology. The welding method involves: optimizing welding parameters based on a genetic algorithm to find the optimal combination of welding parameters, and then performing welding using the current combination of welding parameters; planning and setting the path during the welding process based on a path planning algorithm, allowing the current collector to move along a predetermined path during welding; forming a core by winding the positive and negative electrodes and the separator, with the separator separating the positive and negative electrodes to prevent short circuits; an upper tab is provided at the upper end of the core, and a lower tab is provided at the lower end of the core, which are then welded to the upper and lower current collectors. This invention effectively increases the current-carrying area after differentiation; it can still ensure a large effective current-carrying area while avoiding the inner and outer sides; and it can find the optimal combination of welding parameters for welding and find the best welding path for movement, bringing better application prospects.

The present application relates to the technical field of flow distribution disc, and particularly relates to a high-pressure flow distribution disc three-section flow groove anti-cavitation structure, which comprises a flow distribution disc, the flow distribution disc comprises two centrally-symmetrically arranged large waist-shaped grooves, small waist-shaped grooves are symmetrically arranged on the two sides of the large waist-shaped grooves, the small waist-shaped grooves are arranged through the flow distribution disc, three-section flow grooves and a second single-section flow groove are respectively arranged at the two ends of the large waist-shaped grooves, and the two three-section flow grooves are centrally symmetrically arranged; the three-section flow groove comprises three triangular grooves which are completely identical in structure, the three triangular grooves are arranged at equal intervals, and one end of a same circular-arc groove is communicated with the end portions of the three triangular grooves, and the other end of the circular-arc groove is communicated with the large waist-shaped groove. The present application can increase the flow area, reduce the jet velocity, weaken the influence of wall shear force, thereby inhibit vortex production, further inhibit cavitation phenomenon of the flow distribution disc of the axial plunger pump under high-pressure working condition, reduce flow pressure pulsation and cavitation, and improve the efficiency and service life of the axial plunger pump.

This application provides a battery device, an electrical device, and an energy storage device, belonging to the field of batteries. The battery device includes a control unit and multiple battery cells. The control unit can control the opening and closing of a first switch and a second switch. The first switch connects the first and second terminals of different battery cells, and the second switch connects the first and second terminals of the same battery cell. By controlling the opening and closing of the first and second switches, the battery cells can switch between a first state and a second state. In the first state, the first electrode portion and the second electrode portion are connected in series; in the second state, the first electrode portion and the second electrode portion are electrically isolated. This allows for multiple electrical connection methods between the first and second electrode portions of each battery cell and the first and second electrode portions of another battery cell, thereby expanding the application scenarios of the battery device to a certain extent.

The utility model provides a spherical alloy anticorrosion grounding device, comprising a grounding main body, a leading-out assembly and a grounding wire, the grounding main body is a hollow spherical structure, the grounding main body is connected with the grounding wire through the leading-out assembly, a containing cavity of the grounding main body is filled with a conductive solution, and the lower part of the grounding main body is provided with a plurality of through holes. And the conductive solution is diffused to the external environment. The spherical grounding main body has a larger surface area, the contact area with soil is increased, the diffusion area is large, and the through-flow capability is high. In addition, the grounding main body is filled with a conductive solution, and the conductive solution is slowly released to surrounding soil through the through holes, so that the conductive performance of the soil is enhanced, and the grounding resistance is more effectively reduced. Moreover, the design of the leading-out assembly enables the grounding main body to be conveniently connected with a grounding wire, and provides more reliable grounding protection for equipment and personnel. The grounding device is especially suitable for being used in places requiring reliable grounding protection, such as an electric power system, rail transit, an airport, a communication base station and the like.

The invention discloses a turbine blade air film cooling hole pattern structure, a turbine blade and an engine. The opening of the air film hole outlet is larger than that of the air film hole inlet; the gas transmission channel is connected with the gas film hole inlet and the gas film hole outlet, and the gas transmission channel sequentially comprises a cylindrical section provided with the gas film hole inlet and a conical expansion section connected with the cylindrical section and provided with the gas film hole outlet in the flowing direction of fluid; the gas transmission channel comprises a cylindrical section and a conical expansion section arranged at the downstream of the cylindrical section; the conical expansion section comprises a first expansion part which is formed on the conical expansion section and has an elliptical arc section in section and a second expansion part which is formed on the conical expansion section and has a circular arc section in section. The hole pattern structure of the air film cooling hole of the turbine blade can enhance the adherence and the transverse diffusion capability of cooling airflow, so that the air film cooling efficiency within the working condition range of the high blowing ratio is remarkably improved.

The invention relates to the technical field of water conservancy and hydropower engineering, and discloses an in-hole directional blasting fracturing grouting grounding method which comprises the following steps: operating a drilling machine to form a drill hole; the multiple charging sections are connected in series through the non-charging sections to be assembled into the directional fracturing device; the directional fracturing device is lowered into the drill hole and is filled with stemming; detonating the detonating cord to drive the charging section to generate energy-gathered jet flow, and manufacturing directional fractures in the rock mass; after the hole cleaning operation is completed, the copper-plated flat steel is placed into the drilled hole; and a stop-grouting plug is installed, and a liquid resistance reducing agent is injected into the drill hole through the grouting pipeline. According to the method, directional energy gathering of blasting energy is achieved through the kerf rectangular hole, the integrity of the hole wall of the drill hole is protected, the three-dimensional fracture network which is communicated with one another is constructed through the modular structure, and the solidified resistance reducing agent forms a tree-root-shaped three-dimensional conductive structure. The grouting grounding range is enlarged, the soil resistivity characteristic is improved, and the problem that resistance reduction is difficult in a high-resistivity area is effectively solved.

The utility model discloses a unit curtain wall structure, and relates to the technical field of building curtain walls, the unit curtain wall structure comprises a plurality of curtain wall panels, vertical column profiles, vertical decorative columns and decorative pinch plates, and the curtain wall panels are arranged at intervals; the stand column sectional materials are arranged on the sides, facing the indoor space, of the curtain wall panels, the stand column sectional materials are arranged at the ends of the curtain wall panels, and the two stand column sectional materials arranged at the ends, facing each other, of every two adjacent curtain wall panels are arranged in a spaced mode. The vertical decorative column is arranged on the side, facing outdoors, of the curtain wall panel, and an air guide part is arranged on the side, facing the stand column profile, of the vertical decorative column; the decorative pinch plates are arranged on the two sides of the vertical decorative column, the two ends of each decorative pinch plate are connected with the vertical decorative column and the curtain wall panel respectively, and ventilation holes are formed in the decorative pinch plates. The gap between every two adjacent stand column sectional materials and the gap between the decorative buckle plate and the air guide part form an air channel, and the air channels communicate with the ventilation holes. According to the technical scheme, the problem that an existing curtain wall structure is poor in ventilation effect is solved.

The utility model discloses a kind of shell protection integrated bus duct with equipotential connection, for the equipotential protection of adjoining bus duct, including first bus duct, second bus duct and bus duct connector, two adjacent first bus duct and second bus duct between joint busbar are locked connection by bus duct connector;At least one ground connection is connected on the top side cover plate of first bus duct or and second bus duct, and the equipotential terminal for the ground safety of busbar power transmission loop between all adjacent bus ducts;At least one ground cable line for preventing current overload is connected on the equipotential terminal;Effectively increase the leakage current flow of shell and the safety of busbar power transmission loop ground, reduce the probability of single-phase ground leakage, effectively improve the efficiency of ground protection.

The application provides a flow distribution valve and a downhole power tool, the flow distribution valve comprising an upper joint, a piston, a spring and a lower joint, wherein the upper joint has an axially arranged first flow channel, the upper end of the upper joint is connected with an upstream drill string, and the lower end is fixedly and sealingly connected with the lower joint; the lower joint has an axially arranged second flow channel, the lower end of the lower joint is fixedly connected with a downstream device; the second flow channel comprises a first section and a second section; the piston and the spring are arranged in the first section, the lower end of the piston is in contact with the upper end of the spring, a central throttling hole is arranged on the piston, the central throttling hole can generate a throttling pressure difference to drive the piston to move downward to compress the spring; a flow distribution hole is arranged on the lower joint; the initial position of the piston closes the flow distribution hole; from top to bottom, the ratio of the flow distribution hole flow area to the piston downward distance increases. The downhole power tool comprises the flow distribution valve. The application has the advantages of meeting the small rated displacement requirement of a screw rod, increasing the circulating displacement, circulating the drill cuttings and the proppant out of the wellbore and the like.

This invention relates to the field of exhaust gas cooling technology and discloses a high-reliability exhaust gas recirculation cooler, comprising a shell and inlet and outlet main plates installed on both sides of the shell. A heat dissipation tube assembly is provided inside the shell, comprising several evenly spaced, dotted heat dissipation tubes. The inlet and outlet main plates have square holes equal in number to the dotted heat dissipation tubes. The top and bottom ends of the heat dissipation tube assembly do not have dotted heat dissipation tubes. A tube bundle fixing member is provided on the shell near the outer outlet to constrain the dotted heat dissipation tubes. The cross-section of the tube bundle fixing member is the same as the outer contour of the heat dissipation tube assembly, and the long and short sides of the outermost ring of dotted heat dissipation tubes are in close contact with the inner edge of the tube bundle fixing member. This invention provides a high-reliability exhaust gas recirculation cooler with high thermal shock resistance life, improved vibration resistance while ensuring heat exchange capacity and boiling resistance, resulting in high reliability.

The invention relates to the technical field of pedestal pans, and discloses a water-saving pedestal pan which comprises a flushing part, an accelerating part, a sewage discharging part and a sewage discharging pipe which are sequentially communicated, at least one flushing opening is formed in the rear portion of the flushing part, the width of a water sealing surface at the top of the sewage discharging part is gradually reduced from back to front, and / or at least one boss is arranged on the inner wall of the accelerating part. The slope portion of the boss can play a role in guiding water flow passing through the slope portion, force facing the pollution discharge portion is applied to the part of water flow, and part of water flow is directly guided to the pollution discharge portion, so that water flow rushing to the pollution discharge portion from top to bottom along the inner wall of the acceleration portion is formed under the interaction of the water flow and other water flow. And the part of water flow can generate direct larger impact force on the dirt floating on the water sealing surface and the dirt in the dirt discharge part, so that the dirt can be discharged more easily.

This application provides a battery and its assembly method, as well as an energy storage device. It includes an electrode assembly and a first end cap assembly. The electrode assembly includes a first and a second electrode core, and first and second tabs. The first tab is electrically connected to the first electrode core, and the second tab is electrically connected to the second electrode core. The first and second tabs are positioned opposite each other and spaced apart. The first end cap assembly includes a first end cap, a first electrode post, and a first connecting piece. The first electrode post is mounted on the first end cap. The first connecting piece includes a first electrode post connecting portion and first and second tab connecting portions. The first electrode post connecting portion is electrically connected to the first electrode post. The first and second tab connecting portions are respectively connected to both sides of the first electrode post connecting portion and extend in a direction away from the first end cap. The first tab connecting portion is electrically connected to the first tab, and the second tab connecting portion is electrically connected to the second tab. The technical solution of this application can avoid excessively long connection distances between the outer tabs and the connecting piece, and reduce the tab length.

The utility model relates to the technical field of raw material recovery, and discloses a raw material recovery device for carbon aerogel preparation, which comprises a cylinder body, one side of the top end of the cylinder body is fixedly connected with a material tank, one side of the top end of the cylinder body is fixedly communicated with a steam pipe, and the middle part of the top end of the cylinder body is fixedly provided with a speed reducing motor; the output end of the speed reduction motor penetrates through the inner wall of the barrel and is fixedly connected with a vertical shaft, stirring blades are fixedly connected to the middle and the bottom of the vertical shaft, a brushing assembly is installed on the surface of the vertical shaft, and a spiral pipe is fixedly connected to the inner wall of the material tank. The brushing assembly comprises two supporting rods, two grooves, two elastic pieces, two connecting rods and a brush. According to the utility model, steam is utilized to preheat a carbon aerogel raw material, heat in the steam can be utilized, more energy is saved, meanwhile, the heating efficiency during distillation is improved, and the inner wall of the recovery device is convenient to clean by utilizing the brushing assembly and the vibration motor.

The invention relates to a semiconductor chip with double-sided grooves and a manufacturing method thereof. Belongs to the technical field of power semiconductor devices. The problems that an existing single-groove chip is low in production efficiency, high in cost and limited in forward and reverse blocking voltage boosting are mainly solved. The device is mainly characterized in that the trenches are terminal double-sided trenches and are respectively and symmetrically arranged at P-N junction terminals of the N-type substrate, the anode P layer and the cathode P layer, and the inner surfaces of the trenches are provided with protective layers; and cathode P short-circuit points and cathode P + short-circuit points embedded in the cathode P short-circuit points are uniformly arranged in the cathode N + region, so that a low-resistance conductive current channel is formed. According to the invention, the design of a P-type punch-through ring structure is canceled, and the low-concentration P-type doping and high-concentration P + design is adopted, so that the short-circuit punch-through resistance can be reduced, the through-current capability and the blocking voltage of the chip can be improved, and the method is mainly used for manufacturing medium-voltage and high-voltage power semiconductor device chips.

The utility model relates to the technical field of batteries, and provides a connecting assembly, a battery module, a battery pack and electric equipment, a connecting row comprises a first connecting row and a second connecting row, the first connecting row is provided with a connecting end face and a first pre-tightening position, the second connecting row is provided with a second pre-tightening position, and the second connecting row is suitable for abutting against the connecting end face; the first connecting row is further connected with a limiting part, the limiting part is located on the side, back to the connecting end face, of the first connecting row, and when the second connecting row abuts against the end face, back to the connecting end face, of the first connecting row, the limiting part is suitable for preventing the first pre-tightening position from being aligned with the second pre-tightening position. Dislocation welding of the connecting bar can be effectively prevented, and the phenomenon of pseudo soldering is not prone to occurring when the connecting bar is welded.

The utility model relates to battery technical field discloses the electric core cover plate subassembly, electric core and battery package, wherein the electric core cover plate subassembly, include: cover plate body, pole body and pole bottom plate, cover plate body is seted up and is installed the hole, pole body is inserted in the installed hole and extends to the first surface of cover plate body at least, the cross section of pole body is track and field runway shape, the size of pole body along cover plate body length direction is L1, the size of pole body along cover plate body width direction is W1, satisfy L1>W1, pole bottom plate is connected with one end of pole body and is located in the second surface opposite with the first surface of cover plate body, the size of pole bottom plate along cover plate body width direction is W2, satisfy 0.25<=W1 / W2<=0.5. The utility model discloses the pole body of track and field runway shape can ensure the overcurrent capacity, and through the processing size of pole bottom plate and pole body, can ensure the processing quality of pole body.

The application discloses a variable-speed filter device, which comprises a filter tank body, a water distribution plate arranged horizontally in the filter tank body, a water collecting area below the water distribution plate, a water inlet baffle and a backwashing baffle arranged vertically from the upper portion of the water distribution plate to the top of the filter tank body, a double-ring type variable-speed water distributor arranged between the water inlet baffle and the backwashing baffle, a graded pad layer arranged above the water distribution plate between the water inlet baffle and the backwashing baffle, and graded filter material arranged in the graded pad layer; a water inlet is arranged on the upper portion of one side of the filter tank body, a backwashing side flushing port is arranged on the backwashing baffle; a water inlet electric adjusting mechanism is arranged at the water inlet and used for controlling water inlet and reverse side flushing. The variable-speed filter device is more reasonable in design of filter water inlet and backwashing filter speed, more stable in water outlet, and better in cleaning and backwashing effect.

The utility model relates to the technical field of mining machinery, and discloses a transmission body structure for a mine sewage pump, which comprises a main body, six liquid flow channels are annularly distributed and uniformly arranged in the main body, and a precise sealing groove is arranged on the front side of the main body. And six high-precision inner straight openings are annularly distributed and uniformly formed in the middle of the rear side of the main body. According to the mine sewage pump transmission body structure, the flow channel in the mine sewage pump transmission body structure adopts the multi-section type spiral flow channel design, the scheme that the flow channel is gradually enlarged from the liquid inlet to the liquid outlet is adopted, it is guaranteed that the speed of fluid is gradually reduced in the flowing process, kinetic energy loss is reduced, the overflowing area is increased, the overflowing capacity is improved, and the blocking risk is reduced; and the follow-up machining matching surface is formed through integral precision casting, so that the production difficulty is reduced, the production efficiency is improved, and the production cost is reduced.

The application provides a cover plate structure, a battery, a battery pack and an electric device. The cover plate structure comprises a cover plate body outer connecting piece and a cap. The cover plate body is formed with a through hole. The outer connecting piece is provided with a supporting wall. The supporting wall is formed with a connecting channel communicated with the through hole. The cap is connected to the outer connecting piece. The outer connecting piece is located between the cover plate body and the cap. Part of the structure of the cap extends towards the supporting wall. A connecting space communicated with the connecting channel is formed between part of the structure of the cap and the supporting wall. The cover plate structure can improve the safety performance of the battery and the capacity of the battery.

The utility model discloses a kind of high-capacity strong magnetic fishing tools, including upper joint and lower joint, the upper joint and lower joint between being provided with magnet frame, the magnet frame two ends are respectively provided with magnet frame chuck;The magnet frame is uniformly distributed with a plurality of sector-shaped clamping grooves on circumference, recess is opened in the magnet frame chuck with sector-shaped clamping groove adaptation, V-shaped flow guide groove is arranged between adjacent sector-shaped clamping groove;Fan form magnet structure is formed 360 ° strong magnetic field, can better improve adsorption effect, improve milling efficiency;Adopt clamping groove type design, magnet installation is simpler, need not additional fastener to be fixed, and falling risk is lower, and sector-shaped clamping groove has certain protective effect to magnet;Magnet piece design, maintenance replacement cost is low.