CN115347328A - Cylindrical battery switching structure, cylindrical battery and assembling method thereof - Google Patents
Cylindrical battery switching structure, cylindrical battery and assembling method thereof Download PDFInfo
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- CN115347328A CN115347328A CN202210898569.9A CN202210898569A CN115347328A CN 115347328 A CN115347328 A CN 115347328A CN 202210898569 A CN202210898569 A CN 202210898569A CN 115347328 A CN115347328 A CN 115347328A
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- 238000004804 winding Methods 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/503—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the shape of the interconnectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0404—Machines for assembling batteries
- H01M10/0409—Machines for assembling batteries for cells with wound electrodes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0422—Cells or battery with cylindrical casing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0431—Cells with wound or folded electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
- H01M50/148—Lids or covers characterised by their shape
- H01M50/152—Lids or covers characterised by their shape for cells having curved cross-section, e.g. round or elliptic
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/183—Sealing members
- H01M50/184—Sealing members characterised by their shape or structure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/183—Sealing members
- H01M50/186—Sealing members characterised by the disposition of the sealing members
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/514—Methods for interconnecting adjacent batteries or cells
- H01M50/516—Methods for interconnecting adjacent batteries or cells by welding, soldering or brazing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention belongs to the technical field of batteries, and particularly relates to a cylindrical battery switching structure, a cylindrical battery and an assembly method of the cylindrical battery switching structure, wherein the cylindrical battery switching structure comprises a cover body, a sealing element and a first current collecting component, and the cover body is provided with a first through hole; the sealing element covers the first through hole and is fixedly connected with the cover body; the first current collecting member is disposed at one side of the cap body; the first current collecting member includes a base and a projection, the base and the cover are abutted against each other, and the projection is used for electrically connecting with the first electrode lead. In the process of assembling the battery, the first current collecting component and the cover body are welded in advance to form a first welding assembly, the first current collecting component is provided with a convex part which is formed by bending towards the direction close to the electrode assembly, the cover body is correspondingly provided with a first through hole, the first current collecting component and a first electrode lead of the electrode assembly can be welded through the first through hole, the problem that the difficulty of laser welding of the current collecting component and the cover plate is high is solved, and the welding goodness is improved.
Description
Technical Field
The invention belongs to the technical field of batteries, and particularly relates to a cylindrical battery switching structure, a cylindrical battery and an assembly method of the cylindrical battery.
Background
At present, a cylindrical full-lug power battery mainly adopts a kneading plane lug, then a connecting sheet and the lug kneading plane are welded in a connecting mode to enable the lug to be connected with an adapter sheet, then a positive connecting sheet is welded with a positive pole, and a first adapter sheet is welded with the inner wall of a steel shell or a cover body.
However, the conventional first connecting piece and the inner wall of the steel shell are difficult to weld and have low welding goodness; the welding area of the first connecting piece may occupy a certain space at the negative electrode end in the shell, so that the space utilization rate in the battery cell is reduced, and the air tightness of the pier seal is poor if the welding area is at the pier seal sealing end.
In order to solve the above problems, some new solutions have been proposed, namely: the first switching piece is directly welded with the cover body in a laser mode, and therefore the welding device has the advantages of being small in occupied space, large in welding area, small in resistance and the like.
However, when the production process is adopted, the first connecting piece is welded with the cathode tab, then the cover body is welded with the steel shell seal, and finally the cover body is welded with the first connecting piece.
Disclosure of Invention
One of the objects of the present invention is: the utility model provides a cylinder battery switching structure to prior art's not enough to solve the present problem that the changeover plate and apron laser welding degree of difficulty are big.
In order to achieve the purpose, the invention adopts the following technical scheme: a cylindrical battery transfer structure comprises a cover body, a sealing element and a first current collecting component, wherein the cover body is provided with a first through hole penetrating through the thickness of the cover body; the sealing element covers the first through hole and is fixedly connected with the cover body; the first current collecting member is disposed at one side of the cap body; the first current collecting member comprises a base and a convex part formed by protruding the base part in a direction away from the cover, the base and the cover are abutted against each other, and the convex part is used for being electrically connected with the first electrode lead.
Further, in the axial direction of the lid body, a projection of the projection and a projection of the lid body do not overlap.
Further, the seal includes a welded portion and an extension portion formed by projecting the welded portion in a direction close to the first current collecting member, the extension portion being received in the first through hole.
Further, the first through hole is located in the middle of the cover body, and the ratio of the aperture of the first through hole to the diameter of the cover body is 35% -80%.
Further, the thickness of the welding part is 0.2 mm-0.4 mm, and the thickness of the cover body is 0.4 mm-0.8 mm.
Furthermore, the welding part is provided with an annular sinking platform, and the depth of the annular sinking platform is 0.2-1 mm.
Further, an annular weak area is arranged on the sealing element and used for pressure relief.
The second purpose of the invention is: there is provided a cylindrical battery including: the cylindrical battery switching structure comprises a shell, an electrode assembly, a pole, a second current collecting component and the cylindrical battery switching structure, wherein the shell is of a cylindrical structure with an open opening at one end; the electrode assembly is arranged in the shell, and a first electrode lead and a second electrode lead are respectively led out from two ends of the electrode assembly; the pole is arranged at one end of the shell, which is far away from the open hole; the second current collecting component is electrically connected with the second electrode lead, and one end of the pole penetrates through the shell and is connected with the second current collecting component; the cover body is arranged at the open opening and is hermetically connected with the shell, and the first current collecting component is electrically connected with the first electrode lead.
Further, still include first insulating part, first insulating part is used for sealing the clearance between utmost point post and the casing.
Further, the electrode assembly further comprises a second insulating part, wherein an abutting part is formed on one end part of the second insulating part facing the electrode assembly and protruding outwards along the thickness direction of the second insulating part, and the abutting part is used for abutting against the electrode assembly.
Furthermore, the abutting portion is surrounded by an accommodating cavity, and the second current collecting member is arranged in the accommodating cavity.
The third purpose of the invention is that: there is provided a method of assembling a cylindrical battery, comprising the steps of:
welding the cover and the first current collecting member to form a first welded assembly;
a second electrode lead and the second current collecting member are welded; a first electrode lead welded to a first current collecting member in the first weld assembly;
the electrode assembly is placed in the case;
the second current collecting component is welded with the pole in an ultrasonic torque mode;
the cover body and the shell in the first welding assembly are sealed through laser welding;
injecting electrolyte into the first through hole of the cover body;
the sealing element covers the first through hole, and the sealing element is welded with the cover body.
The invention has the beneficial effects that: a cylindrical battery transfer structure comprises a cover body, a sealing element and a first current collecting component, wherein the cover body is provided with a first through hole penetrating through the thickness of the cover body; the sealing element covers the first through hole and is fixedly connected with the cover body; the first current collecting member is disposed at one side of the cap body; the first current collecting member comprises a base and a convex part formed by protruding the base part in the direction away from the cover, the base and the cover are abutted against each other, and the projection of the convex part and the projection of the cover do not overlap in the axial direction of the cover. The invention provides a cylindrical battery switching structure, wherein a first current collecting component and a cover body are welded in advance to form a first welding assembly in the battery assembling process, a convex part which is formed by bending towards the direction close to an electrode assembly is arranged on the first current collecting component, a first through hole is arranged in the area of the cover body corresponding to the convex part, and the first current collecting component and a first electrode lead of the electrode assembly can be welded through the first through hole, so that the welding difficulty of the first current collecting component is reduced, and the problem of insufficient welding of the first current collecting component and the first electrode lead during welding is avoided.
Drawings
Features, advantages and technical effects of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.
Fig. 1 is a schematic structural view of a vehicle in embodiment 1 of the invention;
fig. 2 is one of the schematic structural views of a cylindrical battery in example 1 of the present invention;
fig. 3 is a second schematic structural view of a cylindrical battery in embodiment 1 of the invention;
FIG. 4 is a left side view of FIG. 2;
FIG. 5 is a right side view of FIG. 2;
fig. 6 is a schematic structural view of a cover in embodiment 1 of the present invention;
FIG. 7 is one of the schematic structural views of a sealing member in example 1 of the present invention;
FIG. 8 is a second schematic structural view of a sealing member in example 1 of the present invention;
fig. 9 is a schematic structural view of a first current collecting member in embodiment 1 of the invention;
fig. 10 is a schematic structural view of a first insulating member in embodiment 1 of the present invention.
Wherein the reference numerals are as follows:
1. a cover body; 1a, the axial direction of the cover body; 11. a first through hole; 2. a seal member; 21. a weld; 22. an extension portion; 3. a first current collecting member; 31. a base; 32. a convex portion; 4. a housing; 5. an electrode assembly; 6. a pole column; 7. a second current collecting member; 8. a first insulating member; 81. a first insulating portion; 82. a connecting portion; 83. a second insulating section; 9. a second insulating member; 91. an abutting portion;
h1, the depth of the annular sinking platform; d1, the thickness of the welding part;
100. a vehicle; 101. a battery.
Detailed Description
As used in the specification and in the claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, and a person skilled in the art can solve the technical problem within a certain error range to substantially achieve the technical effect.
In the description of the application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "horizontal", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present application, unless explicitly stated or limited otherwise, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more; the terms "connected," "secured," and the like are to be construed broadly and encompass, for example, a fixed connection, a removable connection, an integral connection, or an electrical connection; "connected" may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
The present invention will be described in further detail with reference to fig. 1 to 10, but the present invention is not limited thereto.
Example 1
Referring to fig. 2, this embodiment 1 provides a cylindrical battery including a case 4, an electrode assembly 5, and a lid 1 attached to the case 4.
The electrode assembly 5 in embodiment 1 of the present invention is formed into a main body by winding a first pole piece, a second pole piece, and a separator, which is an insulator between the first pole piece and the second pole piece, together around a winding axis. The first pole piece can be a positive pole piece or a negative pole piece; correspondingly, the second pole piece is a negative pole piece or a positive pole piece, and the electrode assembly 5 has two opposite end portions in the axial direction of the case 4, and the two end portions respectively lead out the first electrode lead and the second electrode lead. In embodiment 1, the first electrode lead is a positive electrode tab or a negative electrode tab, and equivalently, the second electrode lead is a negative electrode tab or a positive electrode tab, that is, the polarities of the first electrode lead and the second electrode lead are always opposite.
The housing 4 in embodiment 1 of the present invention is hollow and has a cylindrical structure with an open opening, and the cover 1 is disposed in the open opening and connected to the housing 4 by a laser welding process.
Referring to fig. 2, a first current collecting member 3 is provided on one side of the cap body 1 in embodiment 1 of the present invention.
The inventors have found that, although laser welding of the first current collecting member 3 and the lid body 1 has advantages of small space occupation, large welding area, small resistance, etc., the current welding process is to put the electrode assembly 5 into a case, then weld the first current collecting member 3 and a tab, then seal-weld the lid body 1 and the steel case, and finally weld the lid body 1 and the first current collecting member 3 by laser penetration welding. Although the process has certain advantages, in the actual production and manufacturing process of the battery, the process difficulty is high in specific application, and the risk of poor welding or welding through is easy to occur.
The inventors have analyzed that, in the actual production process, in order to ensure that the strength of the lid body 1 meets the production requirements, the thickness of the lid body 1 is often thicker than that of the first current collecting member 3, and therefore, when the electrode assembly 5 is placed in the case 4, the lid body 1 and the first current collecting member 3 are welded together by laser welding from the lid body 1 side, which easily causes a risk of poor welding or penetration.
Based on this, first current collecting member 3 and cap 1 in embodiment 1 of the invention are welded in advance to form a first welded assembly, that is, first current collecting member 3 and cap 1 are welded in advance to form a first welded part before electrode assembly 5 is placed inside case 4, so that first current collecting member 3 and cap 1 can be welded from the side of first current collecting member 3, avoiding the risk of poor welding or welding through first current collecting member 3.
In order to ensure that the connection mode can be adopted in the production and manufacturing process of the battery, the embodiment 1 of the invention further improves the cylindrical battery, and specifically comprises the following steps:
in embodiment 1 of the present invention, the cap body 1 is provided at the middle thereof with a first through hole 11 penetrating the thickness thereof, and in embodiment 1, the diameter of the first through hole 11 is 35% to 80% of the diameter of the cap body 1, and the first through hole 11 is sealed by a sealing member 2, so that the case 4 and the cap body 1 form a closed space for accommodating the electrode assembly 5.
More specifically, in embodiment 1, the first current collecting member 3 includes a base portion 31 and a projection 32 formed by partially projecting the base portion 31 in a direction away from the lid 1, the base portion 31 and the lid 1 abut against each other, a projection of the projection 32 and a projection of the lid 1 do not overlap in the thickness direction 1a of the lid, and the end surface of the projection 32 and the first electrode lead are welded together by laser penetration welding.
In order to ensure the welding goodness between the convex portion 32 and the first electrode lead, the projection of the convex portion 32 and the projection of the cover 1 do not overlap, that is, the convex portion 32 is disposed corresponding to the first through hole 11 of the cover 1, in this embodiment 1, the first through hole 11 is located at the middle position of the cover 1, the aperture of the first through hole 11 is 35% to 80% of the diameter of the cover 1, and more preferably, the ratio of the aperture of the first through hole 11 to the diameter of the cover 1 is selected from 0.5, 0.6, 0.7 and 0.8. Design like this, when actually welding, can be in the same place convex part 32 and first electrode lead welding through first through-hole 11 for laser can pierce through the thickness of convex part 32, avoids taking place the rosin joint, has improved the welding goodness.
In embodiment 1, it is considered that the first current collecting member 3 and the first electrode lead have a sufficient welding area, since the end surface of the protrusion 32 is used for welding with the first electrode lead, the welding area is determined by the end surface area of the protrusion 32, in order to avoid laser cold welding, the protrusion 32 needs to be welded on the end surface of the first electrode lead through the first through hole during welding, therefore, the ratio of the aperture of the first through hole 11 to the diameter of the lid 1 is set to be 0.6, by such a design, the aperture of the first through hole 11 can be made sufficiently large, and the end surface area of the protrusion 32 can meet the welding requirement, so that the protrusion 32 corresponding to the first through hole 11 can be welded on one side of the first electrode lead through the first through hole 11, and meanwhile, the rigidity strength of the end surface of the battery is ensured, so that the end surface of the battery is not easily deformed under external force impact.
Further, as shown in fig. 2 and 8, the seal member 2 includes a welded portion 21 and an extending portion 22 formed by partially projecting the welded portion 21 in a direction approaching the first collecting member 3, the extending portion 22 being accommodated in the first through hole 11. More specifically, the welding part is provided with the annular platform that sinks, the degree of depth H1 that the platform that sinks of annular is 0.2mm ~ 1mm, from this, make the periphery of welding part 21 be formed with the annular mesa, the annular mesa surrounds the periphery at extension 22, when first welding subassembly assembles with casing 4, with the annular mesa butt on the terminal surface of lid 1, make sealing member 2 can overlap joint on lid 1 terminal surface, then welding part 21 and lid 1 fixed connection with sealing member 2 through the laser welding mode, adopt this kind of overlap joint welding's mode, not only can avoid sealing member 2 to drop the inside risk of entering battery when the external force strikes, but also strengthened the fastness of connection of sealing member 2 and lid 1.
In this embodiment 1, be provided with the recess in the one side that sealing member 2 dorsad first mass flow component 3, recess and first through-hole 11 correspond the setting, can be etched with explosion-proof nick in the recess for sealing member 2 surface has weak region, and when battery inside atmospheric pressure reached upper limit atmospheric pressure value, this weak regional blasting was formed with the pressure release mouth, so that inside gas or the liquid of battery discharged through this pressure release mouth, avoids the battery to explode.
In embodiment 1, the thickness D1 of the welded portion 21 is 0.2mm to 0.4mm, and the thickness of the lid 1 is 0.4mm to 0.8mm. By adopting the design, the welding part 21 and the cover body 1 can be welded together by adopting laser penetration welding from the side of the welding part 21, and the welding goodness rate is improved.
In the present embodiment 1, the extension portion 22 is cylindrical, and the diameter of the extension portion 22 is smaller than or equal to the aperture of the first through hole 11. By the design, when the air pressure in the battery reaches the upper limit air pressure, the extension part 22 can be timely exploded to form a pressure relief opening, so that the gas or liquid in the battery can be conveniently discharged, and the battery is prevented from exploding.
In the embodiment 1, the end of the housing 4 away from the open end is provided with a mounting hole which penetrates through the thickness of the end wall of the housing 4, the pole 6 is partially inserted into the mounting hole, and one end of the pole 6 penetrates through the mounting hole and is fixedly connected with the second current collecting member 7.
More specifically, the second current collecting member 7 and the second electrode lead are electrically connected, and the second current collecting member 7 is welded to one end surface of the electrode post 6, so that electric power of the electrode assembly 5 can be extracted to the outside of the case 4.
In this embodiment 1, in order to ensure insulation between the pole 6 and the housing 4, a gap between the housing 4 and the pole 6 is filled with the first insulating member 8 partially.
The first insulating member 8 includes a first insulating portion 81, a connecting portion 82, and a second insulating portion 83, where the first insulating portion 81 and the second insulating portion 83 are respectively disposed at two ends of the connecting portion 82 to form an i-shaped structure. Connecting portion 82 is used for sealing the clearance between utmost point post 6 and the casing 4, encloses between first insulating portion 81, connecting portion 82 and the second insulating portion 83 to establish and is formed with an annular joint portion, and annular joint portion mutually supports with casing 4 to make first insulating part 8 joint on the terminal surface of casing 4.
In the embodiment 1, the pole 6 and the connecting portion 82 are connected by interference fit.
In order to prevent the second current collecting member 7 from moving and communicating with the case 4 by an external force, in the present embodiment 1, a second insulating member 9 is further provided between the second current collecting member 7 and the case 4.
In the assembly or use process of the conventional battery, a certain moving space exists between two end faces of the electrode assembly 5 and the housing 4, so that the electrode assembly 5 is easy to move back and forth in the housing 4, and when the electrode assembly 5 moves in the housing 4 towards one end of the terminal 6, a first electrode lead led out from the other end of the electrode assembly 5 is easy to fall off from the first current collecting member 3, and further, the cold joint of the battery is caused. In order to prevent this problem, the second insulator 9 in this embodiment 1 is formed with an abutting portion 91 projecting outward in the thickness direction thereof, one end of the abutting portion 91 abuts on the electrode assembly 5, the abutting portion 91 is surrounded by a housing chamber, and the second current collecting member 7 is disposed in the housing chamber. The abutting part 91 abuts against one end face of the electrode assembly 5, so that the electrode assembly 5 can be limited, the electrode assembly 5 is limited in the battery cavity of the shell 4, the electrode assembly 5 is prevented from moving in the battery cavity, and the stability and the reliability of the battery are ensured.
The cylindrical battery provided in embodiment 1 is suitable for various electric devices using batteries.
The powered device may be a vehicle 100, a cell phone, a portable device, a laptop computer, a boat, a spacecraft, a motorized toy, a power tool, and the like. The vehicle 100 may be a fuel vehicle, a gas vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or a range-extended vehicle, etc.; spacecraft include aircraft, rockets, space shuttles, and spacecraft, among others; the electric toys include stationary or mobile electric toys, such as game machines, electric car toys, electric ship toys, electric airplane toys, and the like; the electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools, and electric tools for railways, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, electric impact drills, concrete vibrators, and electric planers. The embodiment of the present application does not specifically limit the above-mentioned electric devices.
For convenience of description, the following embodiments will be described by taking an electric device as the vehicle 100.
For example, as shown in fig. 1, which is a schematic structural diagram of a vehicle 100 according to an embodiment of the present disclosure, the vehicle 100 may be a fuel-oil vehicle, a gas vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid electric vehicle, or an extended range vehicle. The vehicle 100 may be provided with a motor, a controller and a battery 101 inside, and the controller is used to control the battery 101 to supply power to the motor. For example, the battery 101 may be provided at the bottom or the head or tail of the vehicle 100. The battery 101 may be used for powering the vehicle 100, for example, the battery 101 may be used as an operating power source of the vehicle 100 for circuitry of the vehicle 100, for example, for power requirements for operation during start-up, navigation, and operation of the vehicle 100. In another embodiment of the present application, the battery 101 may be used not only as an operating power source of the vehicle 100, but also as a driving power source of the vehicle 100, instead of or in part replacing fuel or natural gas to provide driving power for the vehicle 100.
Example 2
This embodiment 2 provides an assembling method of a cylindrical battery, and the cylindrical battery in this embodiment 2 is the cylindrical battery in the above embodiment 1, and includes the following steps:
s1, winding a first pole piece, a second pole piece and a diaphragm to form an electrode assembly 5;
s2, respectively flattening the first electrode lead and the second electrode lead positioned at the two ends of the electrode assembly 5;
s3, welding the lid 1 and the first current collecting member 3 to form a first welded assembly;
s4, welding a second electrode lead and a second current collecting member 7; the first electrode lead is welded to the first current collecting member 3 in the first welding module;
s5, placing the electrode assembly 5 into the shell 4;
s6, ultrasonically welding the second current collecting member with the pole;
s7, sealing the cover body 1 and the shell 4 in the first welding assembly through laser welding;
s8, injecting an electrolyte into the first through hole 11 of the cover body 1;
and S9, the sealing element 2 covers the first through hole 11, and the sealing element 2 and the cover body 1 are welded to form a second welding assembly.
Example 3
Embodiment 3 provides an assembling method of a cylindrical battery, and the cylindrical battery in embodiment 3 is the cylindrical battery in embodiment 1, and includes the following steps:
s1, respectively die-cutting a plurality of first electrode leads and a plurality of second electrode leads from a first pole piece and a second pole piece;
s2, winding the first pole piece, the second pole piece and the diaphragm to form an electrode assembly 5, and respectively flattening the plurality of first electrode leads and the plurality of second electrode leads;
s3, the lid 1 and the first current collecting member 3 are welded to form a first welded assembly;
s4, welding a second electrode lead and a second current collecting member 7; the first electrode lead is welded to the first current collecting member 3 in the first welding module;
s5, placing the electrode assembly 5 into the shell 4;
s6, ultrasonically welding the second current collecting member with the pole;
s7, sealing the cover body 1 and the shell 4 in the first welding assembly through laser welding;
s8, injecting electrolyte into the first through hole 11 of the cover body 1;
and S9, the sealing element 2 covers the first through hole 11, and the sealing element 2 and the cover body 1 are welded to form a second welding assembly.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should understand that the embodiments as a whole may be combined as appropriate to form other embodiments understood by those skilled in the art.
Variations and modifications to the above-described embodiments may also occur to those skilled in the art, which fall within the scope of the invention as disclosed and taught herein. Therefore, the present invention is not limited to the above-mentioned embodiments, and any obvious modifications, substitutions or alterations based on the present invention will fall within the protection scope of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (12)
1. The utility model provides a cylinder battery switching structure which characterized in that: comprises that
The cover comprises a cover body (1), wherein the cover body (1) is provided with a first through hole (11) penetrating through the thickness of the cover body;
the sealing element (2) covers the first through hole (11) and is fixedly connected with the cover body (1);
a first current collecting member (3), the first current collecting member (3) being provided on one side of the lid body (1);
the first current collecting component (3) comprises a base portion (31) and a convex portion (32) formed by protruding from the base portion (31) in the direction away from the cover body (1), the base portion (31) and the cover body (1) are abutted to each other, and the convex portion (32) is used for being electrically connected with a first electrode lead.
2. The cylindrical battery adapting structure according to claim 1, wherein: in the axial direction of the lid (1), the projection of the projection (32) and the projection of the lid (1) do not overlap.
3. The cylindrical battery adapting structure according to claim 1, wherein: the sealing piece (2) comprises a welding part (21) and an extending part (22) which is formed by protruding from the welding part (21) to the direction close to the first current collecting component (3), and the extending part (22) is accommodated in the first through hole (11).
4. The cylindrical battery adapting structure according to claim 1, wherein: the first through hole (11) is positioned in the middle of the cover body (1), and the ratio of the aperture of the first through hole (11) to the diameter of the cover body (1) is 35-80%.
5. A cylindrical battery adapting structure according to claim 3, wherein: the thickness of the welding part (21) is 0.2 mm-0.4 mm, and the thickness of the cover body (1) is 0.4 mm-0.8 mm.
6. A cylindrical battery transfer structure as defined in claim 3, wherein: the welding part (21) is provided with an annular sinking platform, and the depth of the annular sinking platform is 0.2-1 mm.
7. The cylindrical battery adapting structure according to claim 1, wherein: an annular weak area is arranged on the sealing element and used for pressure relief.
8. A cylindrical battery, comprising:
the shell (4), the said shell (4) has open-ended tubular structure in one end;
the electrode assembly (5), the electrode assembly (5) is arranged in the shell (4), and a first electrode lead and a second electrode lead are respectively led out from two ends of the electrode assembly (5);
the pole post (6), wherein the pole post (6) is arranged at one end of the shell (4) far away from the open hole;
the second current collecting component (7), the second current collecting component (7) is electrically connected with the second electrode lead, and one end of the pole (6) penetrates through the shell (4) and is connected with the second current collecting component (7);
the cylindrical battery transit structure according to any one of claims 1 to 7, wherein a lid body (1) is provided at the open opening and hermetically connected with the case (4), and a first current collecting member (3) is electrically connected with the first electrode lead.
9. A cylindrical battery according to claim 8, wherein: the pole piece is characterized by further comprising a first insulating piece (8), wherein the first insulating piece (8) is used for sealing a gap between the pole piece (6) and the shell (4).
10. A cylindrical battery according to claim 8, wherein: the electrode assembly is characterized by further comprising a second insulating piece (9), wherein an abutting part (91) is formed in a mode that one end part, facing the electrode assembly (5), of the second insulating piece (9) protrudes outwards along the thickness direction of the second insulating piece (9), and the abutting part (91) is used for abutting against the electrode assembly (5).
11. A cylindrical battery according to claim 10, comprising: the abutting portion (91) is surrounded to form an accommodating cavity, and the second current collecting component (7) is arranged in the accommodating cavity.
12. A method of assembling a cylindrical battery according to any one of claims 8 to 11, comprising the steps of:
the cover body (1) and the first current collecting member (3) are welded to form a first welded assembly;
the second electrode lead and the second current collecting component (7) are welded; the first electrode lead is welded with a first current collecting member (3) in the first welding assembly;
the electrode assembly (5) is placed in the shell (4);
the second current collecting member (7) is welded with the pole (6) in an ultrasonic torque mode;
the cover body (1) and the shell body (4) in the first welding assembly are sealed through laser welding;
injecting electrolyte into the first through hole (11) of the cover body (1);
a sealing member (2) covers the first through hole (11), and the sealing member (2) and the lid body (1) are welded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210898569.9A CN115347328B (en) | 2022-07-28 | 2022-07-28 | Cylindrical battery switching structure, cylindrical battery and assembly method of cylindrical battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210898569.9A CN115347328B (en) | 2022-07-28 | 2022-07-28 | Cylindrical battery switching structure, cylindrical battery and assembly method of cylindrical battery |
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| CN115347328A true CN115347328A (en) | 2022-11-15 |
| CN115347328B CN115347328B (en) | 2024-03-15 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2024133409A1 (en) * | 2022-12-23 | 2024-06-27 | Northvolt Ab | Secondary cell |
| WO2024133384A1 (en) * | 2022-12-23 | 2024-06-27 | Northvolt Ab | Secondary cell |
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| JP2000323114A (en) * | 1999-05-12 | 2000-11-24 | At Battery:Kk | Sealed battery |
| JP2016225014A (en) * | 2015-05-27 | 2016-12-28 | 日立オートモティブシステムズ株式会社 | Cylindrical secondary battery |
| CN114725628A (en) * | 2022-04-21 | 2022-07-08 | 远景动力技术(江苏)有限公司 | Battery assembly and battery manufacturing method |
| CN217062293U (en) * | 2022-01-25 | 2022-07-26 | 云山新能源材料技术(深圳)有限公司 | Cylindrical battery |
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| JP2000323114A (en) * | 1999-05-12 | 2000-11-24 | At Battery:Kk | Sealed battery |
| JP2016225014A (en) * | 2015-05-27 | 2016-12-28 | 日立オートモティブシステムズ株式会社 | Cylindrical secondary battery |
| CN217062293U (en) * | 2022-01-25 | 2022-07-26 | 云山新能源材料技术(深圳)有限公司 | Cylindrical battery |
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| WO2024133409A1 (en) * | 2022-12-23 | 2024-06-27 | Northvolt Ab | Secondary cell |
| WO2024133384A1 (en) * | 2022-12-23 | 2024-06-27 | Northvolt Ab | Secondary cell |
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|---|---|
| CN115347328B (en) | 2024-03-15 |
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