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4588results about "Wound/folded electrode electrodes" patented technology
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Lithium battery
PendingUS20250141047A1Small-sized cells cases/jacketsFinal product manufacturePositive currentElectric current flow
A lithium battery includes: a housing in which an accommodation space is formed; a core disposed in the accommodation space; a negative cover disposed at a first end of the housing; a positive cover disposed at a second end of the housing; a positive current collecting disk disposed on a side of the positive cover close to the core; and a support member disposed between the positive cover and the positive current collecting disk and abutting against the positive current collecting disk.
Owner:HUIZHOU EVE POWER CO LTD +1
Rechargeable battery and battery module
PendingUS20250253430A1Small-sized cells cases/jacketsFinal product manufactureMechanical engineeringHeat pipe
A rechargeable battery includes a wound-type electrode assembly, a heat pipe, a can, and a cap plate. The heat pipe is disposed inside of the electrode assembly at a distance from a wound center of the electrode assembly, and the heat pipe surrounds the wound center. The can includes an internal space in which the electrode assembly and the heat pipe are positioned. The cap plate is coupled to an end of an opening of the can to close and seal the can, the cap plate is connected heat pipe, and the cap plate is configured to provide dissipation of heat from the heat pipe.
Owner:SAMSUNG SDI CO LTD
Cylindrical secondary battery
PendingUS20250246770A1Small-sized cells cases/jacketsElectrode carriers/collectorsElectrical batteryMechanical engineering
A cylindrical secondary battery including an electrode assembly including a negative electrode plate and a positive electrode plate; a cylindrical can accommodating the electrode assembly and including a terminal hole in one side of the cylindrical can and an open inlet in another side of the cylindrical can; a terminal coupled to the cylindrical can through the terminal hole; and a negative electrode current collector in the cylindrical can and electrically connecting the cylindrical can to the negative electrode plate. The negative electrode current collector includes a notch groove or a cutting hole configured to be cut in response to an increase in pressure in the cylindrical can.
Owner:SAMSUNG SDI CO LTD
Current collecting plate and battery unit comprising current collecting plate
A current collecting plate for a negative electrode of a battery unit. The current collecting plate comprises: a main body part that forms a main body of the current collecting plate; a welding region that is arranged at the approximate center of the main body part; and a connecting part that connects the welding region to the main body part, wherein in addition to being connected to the connecting part, the welding region is separated from the main body part by a through opening.
Owner:TECHTRONIC CORDLESS GP
Battery, battery pack and vehicle including the same
PendingUS20250149646A1Engine sealsSmall-sized cells cases/jacketsBattery packElectrical and Electronics engineering
A battery includes an electrode assembly having a first uncoated portion and a second uncoated portion; a housing having an open portion formed at one side and configured to accommodate the electrode assembly through the open portion; a first current collector coupled with the first uncoated portion and located inside the housing; a cap configured to cover the open portion; and a spacer. The spacer includes a spacer portion interposed between the first current collector and the cap and configured to prevent movement of the electrode assembly, a gasket portion interposed between the housing and the cap and configured to seal the gap between the cap and the housing, and a connection portion configured to connect the spacer portion and the gasket portion and having a bending portion configured to switch an extension direction thereof between the spacer portion and the gasket portion.
Owner:LG ENERGY SOLUTION LTD
Cylindrical secondary battery
PendingUS20250246778A1Small-sized cells cases/jacketsCylindrical casing cells/batteryElectrical batteryElectrical connection
A cylindrical secondary battery includes an electrode assembly including a first electrode plate, a separator, and a second electrode plate; a case accommodating the electrode assembly and having a lower end that is open and electrically coupled to the second electrode plate; a first current collector plate between a top surface of the electrode assembly and the case and that is electrically connected to the first electrode plate; a terminal passing through a top surface of the case and including a lower end electrically and mechanically coupled to a top surface of the first current collector plate; and a cap plate configured to seal the lower end of the case. The terminal includes a lower terminal including a welding groove having a depth from a top surface of the terminal in a downward direction; and an upper terminal in the welding groove of the lower terminal.
Owner:SAMSUNG SDI CO LTD
Secondary battery
PendingUS20250246667A1Small-sized cells cases/jacketsFinal product manufactureElectrical batteryBattery cell
A secondary battery includes an electrode assembly including a negative electrode plate including a negative electrode leading end uncoated portion, a positive electrode plate including a positive electrode leading end uncoated portion, and an anti-deformation portion attached to the positive electrode leading end uncoated portion, an end of the positive electrode leading end uncoated portion and an end of the anti-deformation portion being located ahead of an end of the negative electrode leading end uncoated portion, a case accommodating the electrode assembly, and electrically coupled to the negative electrode plate, and a cap assembly sealing the case.
Owner:SAMSUNG SDI CO LTD
Power tool control based on battery pack thermal characteristics
A power tool system includes a power tool, a sensor, and an electronic controller of the power tool. The power tool includes a power tool housing, a motor housed within the power tool housing, and a pack interface coupled to the power tool housing. The pack interface receives a power tool battery pack having a corresponding tool interface. The sensor senses an electrical parameter corresponding to a power tool battery pack coupled to the pack interface. The electronic controller of the power tool controls the power tool battery pack to discharge current; receives an output of the sensor when the power tool battery pack is controlled to discharge current; generates a temperature estimate by processing the output of the sensor using a thermal model stored on the memory; and generates a temperature warning signal in response to the temperature estimate exceeding a temperature threshold.
Owner:MILWAUKEE ELECTRIC TOOL CORP
Winding shaft, cell manufacturing apparatus, and cell manufacturing method
ActiveUS12355027B2Assembling battery machinesFinal product manufactureCell fabricationElectrical battery
Provided are a winding shaft, a cell manufacturing apparatus, and a cell manufacturing method. The winding shaft is used for winding plates and includes: a winding shaft body including a first winding surface; an adjustment member configured to be mounted to the winding shaft body and movable simultaneously in an axial direction of the winding shaft and in a radial direction of the winding shaft, where the adjustment member includes a second winding surface, and the first winding surface and the second winding surface are configured to wind the plates jointly; and an actuator configured to drive the adjustment member to move to change a relative position of the second winding surface with respect to the first winding surface, so as to change a winding circumference of the winding shaft. The winding shaft of the present application can reduce the possibility of or the amount of misalignment between the tabs.
Owner:JIANGSU CONTEMPORARY AMPEREX TECH LTD
Joining method
This method, for joining a collector plate and a winding electrode group 2 comprising a separator and electrode plate stacked and wound together, involves pressing a jig 32 against the ends of the electrode plates, which are arranged in the radial direction of the electrode group 2, displacing the jig 32 on a curved trajectory so as to bend the ends such that the amount of displacement towards the electrode group 2 gradually increases and the amount of displacement in the radial direction gradually deceases, and joining the bent ends and the electrode plates.
Owner:PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
Apparatus and method for manufacturing electrode assembly
PendingCN119905681AAssembling battery machinesSmall-sized cells cases/jacketsElectrical batteryIonic Channels
The invention provides an electrode assembly manufacturing device and method, the electrode assembly manufacturing device comprises a winding needle and a heating part, the winding needle is used for winding a pole piece and a separator and forming a winding structure, and the heating part is used for being inserted into the winding center of the winding structure and heating the winding structure. According to the manufacturing equipment, the heating component can heat the winding structure at the winding center of the winding structure, so that at least part of ion channels in the separator of the inner ring in the winding structure are fused and closed, shuttling of ions is blocked, lithium precipitation of the winding structure can be reduced, and the risk of lithium precipitation of the battery can be effectively reduced.
Owner:CONTEMPORARY AMPEREX TECHNOLOGY CO LTD
Electrode assembly, battery cell, battery and electrical device
PCT designated stage expiredWO2025152163A1Wound/folded electrode electrodesNon-aqueous electrolyte accumulator electrodesElectrical batteryBattery cell
Provided in the present application are an electrode assembly, a battery cell, a battery and an electrical device. The electrode assembly comprises a first electrode sheet and a second electrode sheet which have opposite polarities. The first electrode sheet comprises a first electrode sheet body, wherein the first electrode sheet body comprises a first current collecting body and first active material layers, the first current collecting body comprising two first surfaces opposite each other in the direction of thickness of the first current collecting body, and a first end face connecting the two first surfaces, and the first active material layers being arranged on the first surfaces. The electrode assembly further comprises an insulating member connected to the first electrode sheet body, wherein at least part of the insulating member is arranged on the outer side of the first end face in a first direction, the first direction being perpendicular to the direction of thickness. The insulating member can separate burrs on the first end face from the second electrode sheet, thereby reducing the risk of conduction between the burrs and the second electrode sheet and reducing the possibility of thermal runaway caused by a short circuit, improving the reliability of the battery cell.
Owner:CONTEMPORARY AMPEREX TECHNOLOGY CO LTD
Battery monomer, preparation method of battery monomer, battery and power utilization device thereof
ActiveCN119833858AWound/folded electrode electrodesPropulsion by batteries/cellsElectrical batteryStructural engineering
The invention discloses a battery monomer, a preparation method of the battery monomer, a battery and a power utilization device of the battery monomer, and the battery monomer comprises a shell which comprises a first wall; the pole is arranged on the first wall, a connecting hole penetrating through the pole is formed in the pole, at least part of the inner peripheral wall of the connecting hole forms a first inclined plane, and the first inclined plane is obliquely arranged relative to the axis of the connecting hole; the electrode assembly comprises an active substance coating part and a tab, the active substance coating part is arranged in the shell, the tab is electrically connected with the active substance coating part, and at least part of the tab extends into the connecting hole and is connected with the first inclined surface. According to the battery monomer disclosed by the invention, the connecting hole penetrating through the pole column is formed in the pole column, at least part of the inner wall of the connecting hole forms the first inclined surface, and at least part of the tab extends into the connecting hole and is fixedly connected with the first inclined surface, so that the tab occupies less space in the battery monomer, and the weight of the tab and the pole column is reduced; therefore, the energy density of the single battery can be well improved.
Owner:CONTEMPORARY AMPEREX TECHNOLOGY CO LTD
Button cell
A rechargeable battery includes: a case receiving an electrode assembly and including an opening; a cap assembly including a cap plate coupled to the case to cover the opening, and a terminal plate thermally fused to the cap plate by a thermal-fusion member, the thermal-fusion member electrically insulating the cap plate and the terminal plate from each other; and a sealing part attached to and located on a side of the thermal-fusion member, a side surface of the terminal plate, and an outer surface of the cap plate.
Owner:SAMSUNG SDI CO LTD
Electrode assembly, battery and electric equipment
PendingCN119852655AFinal product manufactureWound/folded electrode electrodesElectrical batteryEar region
The invention provides an electrode assembly, a battery and electric equipment, and relates to the technical field of batteries. The electrode assembly includes a wound body. The winding body comprises a wound pole piece, and the pole piece comprises a pole piece body, a tab area and a transition area. The pole piece body is coated with an active substance, and the pole piece body is connected with the tab region through the transition region. And the tab region comprises a plurality of tabs which are arranged at intervals along the winding circumferential direction. The tab area comprises a first section and a second section, one end of the first section is connected with one end, far away from the pole piece body, of the transition area, the second section is connected with one end, far away from the transition area, of the first section, the first section is bent towards the direction far away from the winding center along the leveling direction of the tab area towards the pole piece body, and the second section is bent towards the direction of the winding center. In the leveling process of the tabs, the first section and the second section can be regularly leveled to the pole piece body according to the bending direction, so that the problem that metal chips are generated due to rubbing is effectively avoided, and the distribution rule of the tabs is improved.
Owner:HUIZHOU EVE POWER CO LTD
Rectangular secondary battery
ActiveUS12308394B2Cell seperators/membranes/diaphragms/spacersFinal product manufactureStructural engineeringMechanical engineering
A rectangular secondary battery is provided with: a rectangular exterior body having an opening, a bottom part, a first lateral wall, a second lateral wall, a third lateral wall, and a fourth lateral wall; a sealing plate for sealing the opening; and a flat wound electrode body obtained by winding a positive electrode plate and a negative electrode plate with a separator therebetween, wherein a plurality of the flat wound electrode bodies are arranged in the rectangular exterior body. The flat wound electrode bodies each have: a flat region formed at the center, a first bent region having a bent outer surface and being formed on one end side of the flat region; and a second bent region having a bent outer surface and being formed on the other end side of the flat region.
Owner:SANYO ELECTRIC CO LTD
Non-aqueous electrolyte secondary battery
A non-aqueous electrolyte secondary battery comprises: an electrode body obtained by winding a negative electrode (12) in which a negative electrode mixture layer (32) is formed on a negative electrode core body (30) and a positive electrode, with a separator therebetween; and a non-aqueous electrolyte. The non-aqueous electrolyte secondary battery is characterized in that: the negative electrode (12) has, at the winding direction inner-end side of the electrode body, a non-facing part (12a) which does not face the positive electrode with the separator therebetween; the non-facing part (12a) has a mixture non-facing part (12c) in which the negative electrode mixture layer (32) is formed on at least one surface of the negative electrode core body (30), from the winding direction outer end of the non-facing part (12a) and toward the winding direction inner side; and the average value of a mixture surface distance which is between the mixture non-facing part (12c) and the negative electrode (12e) positioned one turn outward of the mixture non-facing part (12c) is not less than 90 µm.
Owner:PANASONIC ENERGY CO LTD
Casing device and assembling method of battery and battery assembling system
The invention discloses a shell entering device and an assembling method of a battery and a battery assembling system. The shell entering device comprises a rack, a bearing mechanism and a shell assembling mechanism, the bearing mechanism is arranged on the rack and is used for bearing the bottom cover and the electrode assembly supported above the bottom cover; the shell loading mechanism is arranged on the rack and comprises a shell fixing mechanism and a tab part guiding mechanism, the shell fixing mechanism is used for fixing a shell, and the tab part guiding mechanism and the shell fixing mechanism can be close to or far away from the bearing mechanism; the shell fixing mechanism is configured to enable the shell to be arranged on the outer side of the electrode assembly in a sleeving mode through the opening end when the shell fixing mechanism moves close to the bearing mechanism. And the tab part guide mechanism is configured to guide the tab part to penetrate out of the accommodating cavity from the through hole when the shell sleeves the electrode assembly. Through the mode, the tab part smoothly extends out of the shell, so that the electrode assembly can be accurately put into the shell, the preparation difficulty of the battery is reduced, and the assembly efficiency and the yield of the battery are improved.
Owner:CONTEMPORARY AMPEREX TECHNOLOGY CO LTD
Pole piece compounding device, naked battery cell winding equipment and naked battery cell winding method
PendingCN119725346AElectrode rolling/calenderingAssembling battery machinesElectrical batteryPole piece
The invention belongs to the technical field of battery manufacturing, and particularly relates to a pole piece compounding device, naked battery cell winding equipment and a naked battery cell winding method. The pole piece compounding device comprises a first compounding roller assembly, a second compounding roller assembly and a third compounding roller assembly, the first compounding roller assembly comprises a first compounding roller and a second compounding roller, the first compounding roller and the second compounding roller are arranged oppositely, and the first compounding roller and the second compounding roller are used for sequentially compounding a first diaphragm, a first pole piece and a second diaphragm together in a stacked mode; and the side edge diaphragm composite assembly is used for compounding the part, exceeding the side edge of the first pole piece, of the first diaphragm with the part, exceeding the side edge of the first pole piece, of the second diaphragm. The technical scheme provided by the embodiment of the invention aims to solve the problem that the first diaphragm, the first pole piece, the second diaphragm and the second pole piece are easy to fold in the winding process of preparing the naked battery cell, so that the first pole piece and the second pole piece are overlapped.
Owner:CONTEMPORARY AMPEREX TECHNOLOGY CO LTD
Cover plate assembly, battery and electric equipment
PendingCN119864611AWound/folded electrode electrodesCell component detailsElectrical batteryElectric equipment
The invention provides a cover plate assembly, a battery and electric equipment. The cover plate assembly comprises a terminal and a body, the body comprises a first connecting part and a second connecting part, the first connecting part is connected with the terminal, the second connecting part is connected to the side, away from the terminal, of the first connecting part, and an explosion-proof structure is formed at the joint of the first connecting part and the second connecting part. According to the cover plate assembly, when the battery is subjected to thermal runaway, the terminal can be separated from the collector plate of the battery, so that the battery can be powered off, the situation that the thermal runaway is aggravated due to the fact that the battery is still discharged when being subjected to thermal runaway can be avoided, and the safety of the battery is improved.
Owner:HUIZHOU EVE POWER CO LTD +1
Apparatus and method for making coils, preferably for an electrochemical cell intended for battery production
PendingUS20260100402A1Assembling battery machinesFinal product manufactureElectrical batteryMechanical engineering
Owner:GD SPA
Cylindrical battery, and battery pack and vehicle including the same
PendingUS20250239743A1Small-sized cells cases/jacketsCell electrodesElectrical batteryMechanical engineering
A cylindrical battery, which includes an electrode assembly including a first electrode tab and a second electrode tab; a battery housing configured to accommodate the electrode assembly through an open portion and connected to the first electrode tab; a first current collecting plate having a support portion disposed on the electrode assembly, at least one first tab coupling portion extending from the support portion, and at least one housing coupling portion extending from an end of the first tab coupling portion; a second current collecting plate having a rim portion disposed on the electrode assembly, a second tab coupling portion extending inwardly from the rim portion, and a terminal coupling portion spaced apart from the second tab coupling portion; a cap plate configured to seal the open portion; and a battery terminal coupled with the terminal coupling portion.
Owner:LG ENERGY SOLUTION LTD
Electrode assembly, battery cell, battery and electric device
PendingCN120357159AWound/folded electrode electrodesNon-aqueous electrolyte accumulator electrodesElectrical batteryPole piece
The invention provides an electrode assembly, a battery monomer, a battery and a power utilization device. The electrode assembly comprises a first pole piece and a second pole piece which are opposite in polarity. The first pole piece comprises a first pole piece main body, the first pole piece main body comprises a first current collecting main body and a first active material layer, the first current collecting main body comprises two first surfaces which are oppositely arranged along the thickness direction of the first current collecting main body and a first end surface which is connected with the two first surfaces, and the first active material layer is arranged on the first surfaces. The electrode assembly further comprises an insulating part connected to the first pole piece body, at least part of the insulating part is arranged on the outer side of the first end face in the first direction, and the first direction is perpendicular to the thickness direction. The insulating part can separate the burrs on the first end face from the second pole piece, so that the risk of conduction between the burrs and the second pole piece is reduced, the possibility of thermal runaway caused by short circuit is reduced, and the reliability of the single battery is improved.
Owner:CONTEMPORARY AMPEREX TECHNOLOGY CO LTD
Apparatus and Method for Making a Coil, Preferably for an Electrochemical Cell Intended for the Production of Batteries
PendingUS20250158102A1Assembling battery machinesFinal product manufactureControl theoryMechanical engineering
Owner:GD SPA
Aluminum shell cylindrical battery structure for liquid injection at pole terminal
The utility model relates to the technical field of cylindrical batteries, in particular to an aluminum shell cylindrical battery structure with liquid injected at a pole end. Comprising a shell, a roll core is arranged in the shell, the top of the roll core is a negative electrode end, the bottom of the roll core is a positive electrode end, the positive electrode end comprises a cover plate, the edge of the cover plate and the bottom of the shell are subjected to laser welding, the bottom of the cover plate and a positive electrode lug of the roll core are subjected to laser welding, and an anti-explosion valve is arranged in the middle of the cover plate; and a liquid injection hole for injecting liquid is formed between the negative collector plate and the stud. The structure of the positive electrode end is simplified, the cost of structural parts is greatly reduced, and meanwhile, the internal space of the battery cell is fully utilized; compared with the prior art, a conventional bottom liquid injection mode is changed into a top liquid injection mode, so that the turning frequency of the cylindrical battery is reduced, the process is simplified, the equipment investment cost is reduced, the sealing nail is arranged in the liquid injection hole of the stud after the liquid injection is finished, the top end of the sealing nail and the stud are subjected to laser welding, and the sealing and electric connection reliability is effectively ensured.
Owner:YANTAI LIHUA ELECTRIC POWER TECHNOLOGY CO LTD
Tab protection interlayer, full-tab battery cell and cylindrical battery with shell electrode
The invention discloses a tab protection interlayer, a full-tab battery cell and a cylindrical battery with a shell electrode, a non-adhesive area and an adhesive area are arranged on the tab protection interlayer, so that the non-adhesive area is attached to a tab but is not adhered to the tab, and the adhesive area is adhered to a small part of tab root area and is adhered to the end part of a roll core main body at the same time; the probability that the full tab is pulled by the adhesive tape to rebound is reduced to a great extent. When the full tab is kneaded, the interlayer can be pressed towards the center direction of the roll core to form a bending structure, so that the area of an extruded area of the interlayer is reduced, and the interlayer can be adhered to a small part of area of the root part of the tab and an adhesive area on the roll core main body by virtue of the bending structure, so that the roll sleeve and wrinkles are effectively prevented from being extruded by a shell. And the interlayer can also form an elastic sealing ring structure between the shell and the roll core main body, so that the electrolyte is prevented from leaking to the negative electrode end of the cylindrical battery with the positive electrode shell by combining the adhesion sealing effect of the adhesive glue of the interlayer, and the short circuit between the tab and the shell is avoided.
Owner:XIAOGAN CORNEX NEW ENERGY INNOVATION TECHNOLOGY CO LTD
Electrochemical device and electric equipment
PendingCN119698725ASmall-sized cells cases/jacketsLarge-sized flat cells/batteriesStructural engineeringElectrochemistry
The invention discloses an electrochemical device and electric equipment. The electrochemical device comprises a shell, an electrode assembly and a bonding piece, the shell comprises a first side wall, the electrode assembly is arranged in the shell and comprises a first side face adjacent to the first side wall, and the first side face comprises a second area, a first area and a third area which are sequentially arranged in the first direction. The bonding member is located between the case and the electrode assembly. The bonding piece comprises a first side and a second side which are opposite, the first side comprises a first bonding area bonded with the first side wall, and the second side comprises a second bonding area bonded with the second area, a third bonding area bonded with the third area and a first non-bonding area located between the second bonding area and the third bonding area. In the second direction, the projection of the first bonding area is overlapped with the first non-bonding area, and the second direction is the direction in which the first side wall is opposite to the first side face. The first non-bonding area of the bonding piece is not bonded with the first side surface, so that the risk that the electrode assembly is damaged is reduced.
Owner:DONGGUAN AMPEREX TECH
Cylindrical battery design method based on Archimedes spiral formula
The invention discloses a cylindrical battery design method based on an Archimedes spiral formula, which comprises the following steps of: calculating the number of winding turns of a positive electrode, a negative electrode and two layers of diaphragms at one time through the Archimedes spiral formula; and establishing a relation curve of the number of winding turns, the winding radiuses and the winding curves xy of the four groups of assemblies on the battery simulation diagram, obtaining xy coordinate values of the corresponding winding curves of the four groups of assemblies, and completing the winding design of the cylindrical battery. After the positive electrode, the negative electrode and the diaphragm are wound, the diameter of the winding core is certainly and completely consistent with the preset diameter, and the situation that the winding core cannot enter a shell is avoided. Moreover, the method can directly simulate the cross section condition of the wound roll core in an excl table, can more visually judge the diameter of the wound roll core, the wrapping condition of a negative electrode to a positive electrode and other information, and provides great convenience for the design of the roll core.
Owner:CHINA AUTOMOTIVE BATTERY RES INST CO LTD +2
Electrode assembly, battery cell, battery and electric device
PendingCN119852547AFinal product manufactureWound/folded electrode electrodesElectrical batteryElectrical devices
The invention is applicable to the field of batteries, and provides an electrode assembly, a battery monomer, a battery and a power utilization device, the electrode assembly comprises a first pole piece and a diaphragm, the diaphragm comprises two diaphragm layers formed by folding, and the two diaphragm layers respectively cover two opposite ends of the first pole piece along the thickness direction; each diaphragm layer is provided with a first edge part exceeding the end part of the first pole piece along the width direction of the first pole piece, the first edge parts are opposite to the folding ends of the diaphragms, and the first edge parts of the two diaphragm layers are connected with each other to form a first joint part. According to the electrode assembly provided by the embodiment of the invention, the problem of short circuit of the adjacent pole pieces caused by turnover of the diaphragm can be solved.
Owner:CONTEMPORARY AMPEREX TECHNOLOGY CO LTD
Battery cell, battery, electric apparatus, and energy storage apparatus
PendingUS20250391964A1Small-sized cells cases/jacketsWound/folded electrode electrodesElectrical batteryStructural engineering
A battery cell includes a housing and an electrode assembly, where the electrode assembly is accommodated within the housing, the housing is cylindrical, a height of the housing is H1, and a radius of the housing is R1. The housing includes a first end wall, a second end wall, and a side wall, where the first end wall and the second end wall are oppositely disposed along a height direction of the housing, and the side wall connects the first end wall and the second end wall. A sum of thicknesses of the first end wall and the second end wall is a, and a thickness of the side wall is b, satisfying: (R1−b)2*(H1−a) / (R12*H1)≥96%.
Owner:CONTEMPORARY AMPEREX TECHNOLOGY CO LTD