CN219419450U - Cover plate assembly, battery and electronic equipment - Google Patents

Cover plate assembly, battery and electronic equipment Download PDF

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Publication number
CN219419450U
CN219419450U CN202320765228.4U CN202320765228U CN219419450U CN 219419450 U CN219419450 U CN 219419450U CN 202320765228 U CN202320765228 U CN 202320765228U CN 219419450 U CN219419450 U CN 219419450U
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China
Prior art keywords
hole
cover plate
connecting part
assembly
inner connecting
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CN202320765228.4U
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Chinese (zh)
Inventor
车佩佩
陈虎
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Envision Power Technology Jiangsu Co Ltd
Envision Ruitai Power Technology Shanghai Co Ltd
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Envision Power Technology Jiangsu Co Ltd
Envision Ruitai Power Technology Shanghai Co Ltd
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Priority to CN202320765228.4U priority Critical patent/CN219419450U/en
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    • 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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  • Connection Of Batteries Or Terminals (AREA)

Abstract

The utility model relates to the field of batteries, and provides a cover plate assembly, a battery and electronic equipment, wherein the electronic equipment comprises the battery, the battery comprises the cover plate assembly, the cover plate assembly comprises a cover plate body and an electrode lead-out piece, the electrode lead-out piece comprises an outer conductive piece and an inner conductive piece, the inner conductive piece comprises a through part and a connecting plate, the through part penetrates through a cover plate through hole on the cover plate body, the connecting plate is electrically connected with a tab, the outer conductive piece comprises an outer connecting part and an inner connecting part which are fixedly connected, the outer connecting part is electrically connected with a connecting piece, the inner connecting part is electrically connected with the connecting plate through the through part, a first through hole is arranged on the inner connecting part, a second through hole is arranged on the outer connecting part, the inner connecting part is at least partially positioned in the second through hole, and the projection of the first through hole along the axial direction of the electrode lead-out piece is at least partially positioned in the projection of the second through hole. By arranging the inner connection portion at least partially within the second through hole, it is facilitated to reduce the size of the inner connection portion and thereby the material costs.

Description

Cover plate assembly, battery and electronic equipment
Technical Field
The utility model relates to the field of batteries, in particular to a cover plate assembly, a battery and electronic equipment.
Background
At present, in a square-shell battery, a pole is generally arranged into a pole part and a connecting part, the pole part extends out of a through hole in a cover plate body, the connecting part is positioned at one side of the cover plate body, which is close to an electrode assembly, the connecting part is electrically connected with a pole lug led out of the electrode assembly, the pole is electrically connected with a connecting sheet, and the pole part and the connecting part are generally arranged into a solid structure, so that the pole is large in material consumption and high in cost.
Disclosure of Invention
The utility model aims to overcome the defects of large pole material consumption and high cost in the prior art and provides a cover plate assembly, a battery and electronic equipment.
The utility model solves the technical problems by the following technical scheme:
a cover plate assembly, comprising:
the cover plate body is provided with a through cover plate through hole;
the electrode lead-out piece comprises an outer conductive piece and an inner conductive piece, the inner conductive piece comprises a through part and a connecting plate, at least part of the through part is penetrated through the cover plate through hole, and the connecting plate is positioned on one side of the cover plate body, facing the electrode assembly;
the connecting plate comprises a first connecting part, a transitional connecting part and a second connecting part which are sequentially connected, wherein the first connecting part is connected with the through part, the second connecting part is used for being electrically connected with a tab led out by the electrode assembly, the outer conductive part comprises an outer connecting part and an inner connecting part which are fixedly connected, the outer connecting part is used for being electrically connected with the connecting sheet, the inner connecting part is electrically connected with the inner conductive part, a first through hole is formed in the inner connecting part, a second through hole is formed in the outer connecting part, and the inner connecting part is at least partially positioned in the second through hole;
The projection of the first through hole along the axial direction of the electrode lead-out part is at least partially positioned in the second through hole.
In the technical scheme, the inner connecting part is at least partially positioned in the second through hole of the outer connecting part, so that on one hand, the size of the inner connecting part is convenient to reduce, the raw material consumption of the inner connecting part is reduced, and the raw material cost of the inner connecting part and the weight of the cover plate component are reduced; in the two aspects, the contact area of the inner connecting part and the outer connecting part can be increased, so that the reliability of the connection of the inner connecting part and the outer connecting part is improved; in three aspects, the tool is conveniently inserted from the second through hole, and the outer connecting part and the inner connecting part are connected, or the inner connecting part and the inner conductive piece are connected. The projection of the first through hole in the inner connecting part along the axial direction of the electrode lead-out part is at least partially positioned in the projection of the second through hole in the outer connecting part, so that on one hand, the size of the inner connecting part is further reduced; on the other hand, the contact area of the inner connecting part and the outer connecting part is convenient to be further increased, and the reliability and the overcurrent capacity of the fixed connection between the inner connecting part and the outer connecting part are improved.
Preferably, the material of the inner connecting portion and the material of the outer connecting portion are two different metal materials, and the material of the inner connecting portion and the material of the inner conductive member are the same metal material.
In the technical scheme, the same metal has good welding performance and good electric conduction performance, and two different parts are made of the same metal material, so that on one hand, the two parts are convenient to weld; on the other hand, the electric conduction performance of the two parts is convenient to improve, and the overcurrent capacity is ensured so as to improve the reliability of electric connection. The outer connecting portion is electrically connected with the connecting piece outside the cover plate assembly, the inner connecting portion is electrically connected with the electrode lugs through the inner conductive piece, the outer connecting portion is made of one metal material, the inner connecting portion is made of another metal material, so that the cover plate assembly is suitable for the condition that the connecting piece and the electrode lugs are made of two different metal materials, the outer connecting portion and the connecting piece are made of the same metal material, and the inner connecting portion, the inner conductive piece and the electrode lugs are made of the same metal material, so that the reliability of the electric connection of the cover plate assembly and the cover plate assembly is improved.
Preferably, the inner connecting portion and the outer connecting portion are integrally provided, and the inner connecting portion and the outer connecting portion form a fixed connection by welding.
In this technical scheme, through interior connecting portion and outer connecting portion body setting, be convenient for separately process interior connecting portion and outer connecting portion to the material that gets rid of when being convenient for reduce processing interior connecting portion and outer connecting portion, and then reduce the raw and other materials cost of interior connecting portion and outer connecting portion. The inner connecting part and the outer connecting part form fixed connection in a welding mode, and the fixed connection is reliable and stable, so that the electric connection of the inner connecting part and the outer connecting part is reliable. The welding may be brazing, ultrasonic welding, resistance welding, or the like.
Preferably, the inner connecting portion and the outer connecting portion are integrally provided, the inner connecting portion and the outer connecting portion are fixedly connected through mutually matched clamping structures, and at least part of the inner connecting portion and the outer connecting portion are fixedly connected at the contact surface through welding.
In the technical scheme, the inner connecting part and the outer connecting part are fixedly connected through the clamping structure, so that on one hand, the connecting mode is simple and reliable; on the other hand, the structure of the outer conductive member can be made compact. After the inner connecting part and the outer connecting part are clamped and fixed, the contact surfaces of the inner connecting part and the outer connecting part are welded, so that the reliability of the fixed connection of the inner connecting part and the outer connecting part can be further improved, the stability of overcurrent between the inner connecting part and the outer connecting part is improved, and the reliability of the electric connection of the inner connecting part and the outer connecting part is improved.
Preferably, the second through hole comprises a through hole part and a counter bore part, the counter bore part is positioned at one side of the outer connecting part far away from the electrode assembly, the middle part of the counter bore part is provided with the through hole part and forms a step with the through hole part, at least part of the inner connecting part is contacted with one side of the counter bore part near the electrode assembly, and at least part of the through hole part extends into the first through hole and is fixedly connected with the inner connecting part.
In the technical scheme, the through hole part is arranged at the counter bore part, so that a step is formed between the counter bore part and the through hole part. The inner connecting part is contacted with one side of the counter bore part, which is close to the electrode assembly, namely the inner connecting part is arranged at the step part and contacted with the step surface of the step, so that on one hand, the contact area of the inner connecting part and the outer connecting part can be increased, and the connection reliability of the outer connecting part and the inner connecting part is improved; on the other hand, the step can play a supporting role on the inner connecting part, and the reliability of connection between the outer connecting part and the inner connecting part is further improved. In addition, the tool is convenient to extend into the counter bore part to connect the outer connecting part and the inner connecting part, and the convenience of assembling the cover plate assembly is improved.
Preferably, the cross section of the inner connecting part along the axial direction of the electrode lead-out piece is L-shaped;
the inner connecting part is contacted with the side wall of the through hole part;
or, the inner connecting portion is in contact with the side wall of the counter bore portion.
In the technical scheme, the inner connecting part is L-shaped, the inner connecting part is contacted with one side of the counter bore part, which is close to the electrode assembly, and the side wall of the through hole part, or the inner connecting part is contacted with one side of the counter bore part, which is close to the electrode assembly, and the side wall of the counter bore part, so that the inner connecting part and the outer connecting part form two-sided contact, on one hand, the contact area of the inner connecting part and the outer connecting part can be increased, and the connection reliability of the inner connecting part and the outer connecting part is improved; on the other hand, the inner connecting portion and the outer connecting portion are in multi-face contact, so that the outer connecting portion can support the inner connecting portion more reliably. In addition, when the inner connecting part is in contact with one side of the counter bore part, which is close to the electrode assembly, and the side wall of the through hole part, if the outer connecting part is in welded connection with the inner connecting part, the welding depth can be increased, and the connection reliability of the inner connecting part and the outer connecting part is further improved.
Preferably, the cross section of the inner connecting part along the axial direction of the electrode lead-out piece is Z-shaped, and the inner connecting part is contacted with the side wall of the through hole part and the side wall of the counter bore part.
In the technical scheme, the inner connecting part is Z-shaped, the side walls of the inner connecting part and the counter bore part, one side of the counter bore part close to the electrode assembly and the side wall of the through hole part are contacted, so that the inner connecting part and the outer connecting part form three-surface contact, on one hand, the contact area of the inner connecting part and the outer connecting part can be increased, and the connection reliability of the inner connecting part and the outer connecting part is improved; in the two aspects, when the inner connecting part and the outer connecting part are connected by welding, the welding depth can be increased, and the reliability of the connection between the inner connecting part and the outer connecting part is further improved; in three aspects, the inner connecting part and the outer connecting part are in multi-surface contact, so that the outer connecting part can support the inner connecting part more reliably.
Preferably, an inner conductive member recess is formed in a side of the penetration portion facing the electrode assembly, and a hermetic sealing chamber is defined by the cover body, the case of the battery, and an inner surface of the inner conductive member recess.
In the technical scheme, the concave part of the inner conductive part is arranged, so that the weight of the inner conductive part is convenient to reduce; on the other hand, the inner conduction is convenient to adopt stamping forming. The inner conductor is formed by stamping, so that on one hand, the manufacturing is simple and convenient; on the other hand, it is convenient to reduce or avoid the material removal of the inner conductive member, thereby reducing the raw material cost of the inner conductive member. The gas generating space of the battery cell is used for containing gas generated in the working process of the battery cell, so that the structural deformation of related structures in the battery caused by the gas pressure effect after the gas generation of the battery cell is reduced; a closed sealing cavity is defined between the concave part of the inner conductive part and the shell as well as between the concave part of the inner conductive part and the cover plate body, when the sealing cavity comprises the gas generating space of the battery core, the concave part of the inner conductive part is beneficial to expanding the communication area of the gas generating space, and on one hand, the deformation amount in the working process of the battery can be reduced; on the other hand, the size of the deformation space reserved for the cell gas generation can be reduced, so that the battery or the electronic device on which the battery is mounted is compact.
Preferably, the projection of the inner connecting portion along the axial direction of the electrode lead-out member is located in the outer connecting portion;
and/or the projection of the inner connecting part along the axial direction of the electrode lead-out piece is positioned in the cover plate through hole.
In the technical scheme, the projection of the inner connecting part is positioned in the projection of the outer connecting part, so that the radial dimension of the inner connecting part is prevented from being larger than that of the outer connecting part, the inner connecting part is conveniently covered by the outer connecting part, and on one hand, the sealing performance of sealing the outer conductive piece is conveniently improved; on the other hand, the radial dimension of the inner connecting part is convenient to reduce, so that the material consumption of the inner connecting part is reduced, and the material cost of the inner connecting part is reduced. The projection of the inner connecting part is positioned in the projection of the through hole of the cover plate, so that on one hand, the radial dimension of the inner connecting part is conveniently reduced to reduce the material cost; on the other hand, the cover plate assembly is convenient to compact.
Preferably, the cover plate assembly further comprises a seal surrounding the through portion, at least part of the seal being compressed between the connection plate and the cover plate body;
and/or the cover plate assembly further comprises a support member, at least part of which is located between the cover plate body and the outer conductive member.
In the technical scheme, the sealing element is arranged, and sealing between the cover plate body and the connecting plate is realized through compressing the sealing element. By providing the support member, on the one hand, the support member is used for supporting the outer conductive member; on the other hand, for isolation of the outer conductive member and the cover plate body, thereby achieving insulation.
Preferably, the height difference from the side of the through part far away from the connecting plate to the side of the connecting plate abutting against the sealing member is H1, and H1 is more than or equal to 0.3mm and less than or equal to 4mm;
and/or, a support protrusion is arranged on one side of the support facing the electrode assembly, and at least part of the support protrusion is positioned between the outer wall of the through part and the inner wall of the cover plate through hole.
In the technical scheme, the range of H1 is between 0.3 and 4mm, so that the inconvenience of mounting the sealing element and the cover plate body due to too small H1 can be avoided, and the problem that the cover plate assembly is not compact due to too large size along the axial direction of the electrode lead-out element due to too large H1 can be avoided. The convex part of the supporting piece extends into the through hole of the cover plate, on one hand, the isolation between the through hole of the cover plate of the cover body and the through part is realized, and therefore, the insulation is realized; on the other hand, the isolation between the external conductive piece and the cover plate body has better insulation effect.
Preferably, a side of the support facing the electrode assembly has a support protrusion, at least a portion of the support protrusion being located between an outer wall of the through-portion and an inner wall of the cap through-hole, the support protrusion and the seal abutting within the cap through-hole;
and/or, one side of the sealing member, which is far away from the electrode assembly, is provided with a sealing member convex part, at least part of the sealing member convex part is positioned between the outer wall of the through part and the inner wall of the cover plate through hole, and the sealing member convex part is abutted against the supporting member.
In this technical scheme, set up sealing member convex part and/or support piece convex part, realize the butt of backup pad and sealing member for the isolation effect of outer electrically conductive piece and apron body is better, makes the isolation effect of the through-hole of the apron through-hole of interior electrically conductive piece and apron body better. Further, the support piece and the sealing piece are abutted in the cover plate through hole, and the cover plate through hole and the through part can prevent the support piece and the sealing piece from being abutted and falling off, so that isolation is reliable.
Preferably, a side of the cap body away from the electrode assembly has a cap groove, and the support member and the outer conductive member are disposed in the cap groove.
In the technical scheme, the cover plate groove is formed, the supporting piece and the outer conductive piece are arranged in the cover plate groove, on one hand, the cover plate groove can be used as a positioning mark of the supporting piece and the outer conductive piece, and the assembly of the cover plate assembly is facilitated; on the other hand, the dimension of the cover plate assembly along the axial direction of the electrode lead-out piece is convenient to reduce, so that the cover plate assembly is compact in structure.
Preferably, the depth of the cover plate groove is H2, and H2 is more than or equal to 0.05mm and less than or equal to 1.5mm;
and/or the inner contour of the cover plate groove is a non-circular contour, and the outer contour of the supporting piece is matched with the inner contour of the cover plate groove.
In the technical scheme, the depth of the cover plate groove is between 0.05mm and 1.5mm, so that inconvenient processing caused by too shallow depth of the cover plate groove can be avoided, and structural strength can be prevented from being influenced by too deep depth of the cover plate groove. The outline of the cover plate groove is a non-circular outline, and the support piece and the electrode lead-out piece can be prevented from rotating relative to the cover plate body, so that the connection falling caused by the rotation of the electrode lead-out piece is avoided, and the reliability of the cover plate assembly is improved.
Preferably, an anti-rotation structure matched with each other is arranged between the outer conductive piece and the supporting piece.
In this technical scheme, through setting up anti-rotation structure between outer conductive piece and support piece to avoid rotation each other between support piece and the outer conductive piece, thereby avoid electrode lead-out piece to rotate relative support piece or apron body and lead to connecting droing, improve the reliability of apron subassembly.
Preferably, a side of the through part remote from the electrode assembly has a through part protrusion passing through and engaged with the first through hole.
In this technical scheme, through-hole portion convex part block is in first through-hole for through-hole portion and interior connection of connecting the portion more reliably, make the electricity that forms between through-hole portion and the outer electrically conductive piece connect more reliably. The through part convex part penetrates through and is clamped at the first through hole, and the projection of the first through hole along the axial direction of the electrode lead-out piece is at least partially positioned in the second through hole, so that a tool can conveniently extend into the first through hole from the second through hole to connect the through part convex part and the inner connecting part.
Preferably, the through part convex part and the inner connecting part form a fixed connection at the first through hole by welding.
In the technical scheme, the through part convex part and the inner connecting part form a fixed connection which can not shake through welding, so that the electric connection between the through part and the outer conductive piece is more reliable.
Preferably, along the axial direction of the electrode lead-out piece, the thickness of the matching area of the inner connecting part and the through part is T, and T is more than or equal to 0.3mm and less than or equal to 2mm;
and/or the first through hole is a circular through hole, and the diameter is D, and D is more than or equal to 3mm and less than or equal to 12mm.
In the technical scheme, T is between 0.3mm and 2mm, so that the problem that the cover plate assembly is not compact in the axial direction of the electrode lead-out piece due to overlarge internal T can be avoided, and the problem that the internal connecting part and the external connecting part are inconvenient to connect due to overlarge T can be avoided; when the first through hole is a circular through hole, the diameter is between 3 and 12mm, and the problem that the cover plate assembly is not compact in structure due to the fact that the diameter of the first through hole is too large can be avoided. T is between 0.3mm and 2mm, and D is between 3 and 12mm, so that the contact area between the inner wall of the first through hole and the through part can be ensured, and the reliability of connection is improved.
Preferably, the first through hole is a circular through hole;
or, the first through hole is a non-circular through hole.
In this technical scheme, first through-hole is non-circular through-hole, can prevent that through-part convex part from rotating relative first through-hole to avoid interior conductive part rotation to lead to connecting droing, improve the reliability of apron subassembly.
A battery, preferably comprising:
a housing;
the cover plate assembly according to any one of the above technical schemes, wherein the cover plate assembly is covered on the shell and is jointly limited with the shell to form a containing cavity;
and the battery cell is accommodated in the accommodating cavity and is connected with an electrode assembly.
An electronic device comprising the battery.
The utility model has the positive progress effects that:
by arranging the inner connecting part at least partially positioned in the second through hole of the outer connecting part, on one hand, the size of the inner connecting part is convenient to reduce, so that the raw material consumption of the inner connecting part is reduced, and the raw material cost of the inner connecting part and the weight of the cover plate component are reduced; in the two aspects, the contact area of the inner connecting part and the outer connecting part can be increased, so that the reliability of the connection of the inner connecting part and the outer connecting part is improved; in three aspects, the tool is conveniently inserted from the second through hole, and the outer connecting part and the inner connecting part are connected, or the inner connecting part and the inner conductive piece are connected. The projection of the first through hole on the inner connecting part along the axial direction of the electrode lead-out part is at least partially positioned in the projection of the second through hole in the outer connecting part, so that on one hand, the size of the inner connecting part is further reduced; on the other hand, the contact area of the inner connecting part and the outer connecting part is convenient to be further increased, and the reliability and the overcurrent capacity of the fixed connection between the inner connecting part and the outer connecting part are improved.
Drawings
FIG. 1 is a schematic structural diagram of a cover plate assembly according to an embodiment 1 of the present utility model;
FIG. 2 is a schematic structural diagram of a cover plate assembly according to embodiment 1 of the present utility model;
FIG. 3 is a schematic view of an exploded structure of a cover plate assembly according to embodiment 1 of the present utility model;
FIG. 4 is a schematic cross-sectional view of a cover plate assembly according to embodiment 1 of the present utility model;
fig. 5 is an enlarged view of a portion a in fig. 4;
fig. 6 is a schematic structural view of the outer conductive member and the supporting member according to embodiment 1 of the present utility model;
fig. 7 is a schematic structural view of an external connection part according to embodiment 1 of the present utility model;
fig. 8 is a schematic structural diagram of an inner conductive member according to embodiment 1 of the present utility model;
fig. 9 is a schematic structural view of a connection board according to embodiment 1 of the present utility model;
FIG. 10 is a schematic view of the structure of the connecting portion of embodiment 2 of the present utility model;
fig. 11 is a schematic structural view of an external connection portion according to embodiment 2 of the present utility model;
FIG. 12 is a sectional view showing a partial structure of a cover plate assembly of embodiment 2 of the present utility model;
fig. 13 is a schematic structural view of an inner connecting portion in embodiment 3 of the present utility model;
fig. 14 is a schematic structural view of an external connection portion according to embodiment 3 of the present utility model;
FIG. 15 is a sectional view showing a partial structure of a cover plate assembly of embodiment 3 of the present utility model;
FIG. 16 is a schematic view showing the structure of an interconnecting piece according to embodiment 4 of the present utility model;
fig. 17 is a schematic structural view of an external connection portion according to embodiment 4 of the present utility model;
Fig. 18 is a sectional view showing a partial structure of a cap plate assembly of embodiment 4 of the present utility model.
Reference numerals illustrate:
a cover plate assembly 1000;
an electrode lead 100;
an outer conductive member 1;
an inner connecting portion 11, a first through hole 12, a first extending portion 13, a second extending portion 14, a third extending portion 15;
the outer connecting part 21, the second through hole 22, the counter bore part 23, the through hole part 24 and the clamping groove 25;
an inner conductor 3, a through portion 31, a connection plate 32, a first connection portion 33, a transition connection portion 34, a second connection portion 35, a through portion convex portion 36, and an inner conductor concave portion 37;
a cover body 200, a cover through hole 201 and a cover groove 202;
a support 300, a support protrusion 301;
a seal 400;
lower plastic 500;
an electrode assembly 2000;
an axial direction H of the electrode lead;
a height difference H1 from one side of the through part away from the connecting plate to one side of the connecting plate, which is abutted with the sealing element;
depth H2 of the cover plate groove;
the thickness of the inner connecting part along the axial direction of the electrode lead-out piece is T;
diameter D of the first through hole.
Detailed Description
The present utility model will now be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments are shown.
The dashed lines in the drawings are auxiliary lines for facilitating understanding of the positions of the components, the boundaries between the components, or the dimensioning, and do not represent the actual structures of the components;
The radial direction may be used to refer to the direction of a circular structure or a non-circular structure, the radial direction of which refers to the direction perpendicular to the axial direction H of the electrode lead 100;
"at least part XXX", "XXX at least part" means the same meaning, as "at least part of the support" means "at least part of the support"; similarly, "all XXX" and "XXX all" are intended to have the same meaning;
between two values, including endpoints, such as between 1 and 2, including 1 and 2;
a side close to, toward, or away from the electrode assembly 2000 means a side close to, toward, or away from the electrode assembly 2000 in the height direction of the electrode lead 100, i.e., toward;
in embodiments 1 to 4, the axial direction and the vertical direction of the electrode lead 100 are parallel; in other embodiments, the axial direction of the electrode lead 100 may not be parallel to the vertical direction;
the weight of the parts of the cover plate assembly 1000 is reduced, so that the weight of the whole battery is reduced; on the other hand, the weight ratio of the battery core in the battery can be improved, and the quality energy density of the battery is improved;
the contact area between the two parts is increased, and when the two parts are fixedly connected, the reliability of the fixed connection of the two parts is increased conveniently; when two parts are electrically connected, the overcurrent capacity is conveniently improved, so that the reliability of the electrical connection is improved.
Example 1
The embodiment provides an electronic device, which includes a battery, the battery includes a housing, a cover plate assembly 1000, and a battery cell, wherein the cover plate assembly 1000 is covered on the housing, and defines a containing cavity together with the housing, the battery cell is contained in the containing cavity, and the battery cell is connected with an electrode assembly 2000.
Electronic devices include, but are not limited to: notebook computers, pen-input computers, mobile computers, electronic book players, portable telephones, portable fax machines, portable copiers, portable printers, headsets, video recorders, liquid crystal televisions, hand-held cleaners, portable CD-players, mini-compact discs, transceivers, electronic notebooks, calculators, memory cards, portable audio recorders, radios, stand-by power supplies, motors, automobiles, motorcycles, mopeds, bicycles, lighting fixtures, toys, game machines, watches, electric tools, flashlights, cameras, household large-sized storage batteries, energy storage or sodium ion capacitors, and the like.
Fig. 1 to fig. 9 are schematic structural diagrams of a cover assembly 1000 according to embodiment 1 of the present utility model. Other structures of the battery besides the cap plate assembly 1000 are disclosed in the prior art in a large number of documents, and reference is made to the prior art in particular.
As shown in fig. 1 to 5, the cap assembly 1000 includes a cap body 200 and an electrode lead 100; the cover plate body 200 is provided with a cover plate through hole 201 penetrating through; the electrode lead 100 includes:
the inner conductive member 3, the inner conductive member 3 includes a through portion 31 and a connection plate 32, a part of the through portion 31 is penetrated through the cover plate through hole 201, the connection plate 32 is located at one side of the cover plate body 200 facing the electrode assembly 2000, the connection plate 32 includes a first connection portion 33, a transition connection portion 34 and a second connection portion 35 which are sequentially connected, the first connection portion 33 is connected with the through portion 31, and the second connection portion 35 is used for electrically connecting with a tab led out from the electrode assembly 2000;
the outer conductive member 1, the outer conductive member 1 includes fixedly connected outer connecting portion 21 and inner connecting portion 11, outer connecting portion 21 is used for being connected with the connection piece electricity, inner connecting portion 11 and through-hole 31 electricity are connected, be equipped with first through-hole 12 on the inner connecting portion 11, be equipped with second through-hole 22 on the outer connecting portion 21, inner connecting portion 11 is located second through-hole 22, and the projection of first through-hole 12 along the axial direction of electrode lead-out 100 is located second through-hole 22.
By the inner connecting part 11 being positioned in the second through hole 22 of the outer connecting part 21, on one hand, the size of the inner connecting part 11 is convenient to be reduced, so that the raw material consumption of the inner connecting part 11 is reduced, and the raw material cost of the inner connecting part 11 and the weight of the cover plate assembly 1000 are reduced; in both aspects, the contact area of the inner connection part 11 and the outer connection part 21 can be increased, thereby improving the reliability of the connection of the inner connection part 11 and the outer connection part 21; in three aspects, it is convenient for a tool to extend from the second through hole 22 to connect the outer connecting portion 21 and the inner connecting portion 11, or to connect the inner connecting portion 11 and the inner conductive member 3. The projection of the first through hole 12 on the inner connecting portion 11 in the axial direction of the electrode lead-out member 100 is located within the projection of the second through hole 22 on the outer connecting portion 21, on the one hand, so that the size of the inner connecting portion 11 is further reduced; on the other hand, it is convenient to further increase the contact area of the inner connection portion 11 and the outer connection portion 21, and to improve the reliability and overcurrent capability of the fixed connection between the inner connection portion 11 and the outer connection portion 21. In other embodiments, some or all of the inner connecting portion 11 may be located within the second through hole 22.
In the present embodiment, the inner connection part 11 and the outer connection part 21 are provided separately, so that the inner connection part 11 and the outer connection part 21 are conveniently processed separately, thereby facilitating the reduction of the material removed when the inner connection part 11 and the outer connection part 21 are processed, and further reducing the raw material cost of the outer connection part 21 of the inner connection part 11.
Specifically, the material of the outer connection portion 21 is aluminum, and the material of the inner connection portion 11 and the inner conductive member 3 is copper. The outer connecting portion 21 is electrically connected with the connecting piece outside the cover plate assembly 1000, the inner connecting portion 11 is electrically connected with the electrode lugs through the inner conductive piece 3, the outer connecting portion 21 is made of one metal material, the inner connecting portion 11 is made of another metal material, so that the cover plate assembly 1000 is suitable for the condition that the connecting piece and the electrode lugs are made of two different metal materials, the outer connecting portion 21 and the connecting piece are made of the same metal material, and the inner connecting portion 11, the inner conductive piece 3 and the electrode lugs are made of the same metal material, so that the reliability of the electric connection of the cover plate assembly 1000 and the outer structure is improved. The same kind of metal has good welding performance and good electric conduction performance, the inner connecting part 11 and the inner conductive piece 3 are made of the same kind of metal material, on one hand, the inner connecting part 11 and the through part 31 of the inner conductive piece 3 are convenient to be welded to form electric connection, on the other hand, the electric conduction performance of the inner connecting part 11 and the through part 31 is convenient to be improved, the overcurrent capacity is ensured, and the reliability of electric connection is improved.
In other embodiments, when the tab and the connecting piece are made of the same metal material, the outer connecting portion 21, the inner connecting portion 11, and the inner conductive member 3 may be made of the same metal material as the connecting piece. In other embodiments, when the tab and the connecting piece are made of different metal materials, the inner connecting portion 11 and the outer connecting portion 21 may be made of the same metal material, and in this case, the inner connecting portion 11 and the through portion 31 may be made of the same metal material, or the through portion 31 and the connecting plate 32 may be made of different metal materials.
In this embodiment, the inner connecting portion 11 and the outer connecting portion 21 form a fixed connection by welding, and the fixed connection is reliable and stable, so that the electrical connection between the two is reliable. The welding may be brazing, ultrasonic welding, resistance welding, or the like.
Specifically, as shown in fig. 5 and 8, the inner conductive member 3 has a through-part protrusion 36 on the side away from the electrode assembly 2000, and the through-part protrusion 36 passes through and engages with the first through hole 12 to form a fixed connection with the inner conductive member 11, so that the connection is simple and reliable, and the electrical connection between the through-part 31 and the outer conductive member 1 is reliable. Specifically, in the present embodiment, the through-portion convex portion 36 and the inner connecting portion 11 form a fixed connection at the first through hole 12 by welding. The welding may be brazing, laser welding, friction stir welding, or the like. The through-part protrusion 36 and the inner connecting part 11 form a fixed connection that is not wobblable by welding, so that the electrical connection between the through-part 31 and the outer conductive member 1 is more reliable.
As shown in fig. 5, the side of the inner conductive member 3 facing the electrode assembly 2000 is provided with an inner conductive member recess 37, and the provision of the inner conductive member recess 37 can serve to reduce weight and raw material costs as compared to a solid structure. Fig. 8 is a schematic structural view of the inner conductive member 3, and fig. 9 is a schematic structural view of the connection plate 32 provided to show the rough boundaries between the first connection portion 33, the transition connection portion 34, and the second connection portion 35 in the connection plate 32. In the present embodiment, the through portion 31 of the inner conductive member 3 and the connection plate 32 are integrally formed, and are formed by press forming using a plate material. In the present embodiment, the inner conductive concave portion and the through portion convex portion 36 are simultaneously provided, so that the inner conductive member 3 is convenient to be punched and formed, on the one hand, compared with machining, casting, or the like, the inner conductive member 3 is more convenient to be manufactured by punching and forming, and the processing cost is low; in two aspects, the raw materials required to be removed for stamping forming are few or are not required to be removed, and the cost of the raw materials is low. In other embodiments, the through portion 31 may not be provided with the through portion convex portion 36, and the inner conductive member 3 may not be provided with the inner conductive member concave portion 37; in other embodiments, the inner conductor concave portion 37 may not be provided when the through portion convex portion 36 is provided, and the through portion convex portion 36 may not be provided when the inner conductor concave portion 37 is provided.
Further, the cover body 200, the housing of the battery, and the inner surface of the inner conductive member recess 37 together define a hermetically sealed cavity. The gas generating space of the battery cell is used for containing gas generated in the working process of the battery cell, so that the structural deformation of related structures in the battery caused by the gas pressure effect after the gas generation of the battery cell is reduced; a sealed cavity is defined between the inner conductive piece concave part 37 and the shell and cover plate body 200, when the sealed cavity comprises the gas generating space of the battery core, the inner conductive piece concave part 37 is beneficial to enlarging the communication area of the gas generating space, and on one hand, the deformation amount in the working process of the battery can be reduced; on the other hand, the size of the deformation space reserved for the cell gas generation can be reduced, so that the battery or the electronic device on which the battery is mounted is compact.
As shown in fig. 6 and 7, the second through hole 22 includes a through hole portion 24 and a countersink portion 23, the countersink portion 23 is located at a side of the outer connecting portion 21 far away from the electrode assembly 2000, the through hole portion 24 is disposed at a middle portion of the countersink portion 23, the through hole portion 24 and the countersink portion 23 form a step, the inner connecting portion 11 is in a circular ring shape, the inner connecting portion 11 contacts with a side wall of the countersink portion 23, a side of the countersink portion 23 near the electrode assembly 2000, and welding is performed at a contact surface of the outer connecting portion 21 and the inner connecting portion 11 to be fixed, as shown in fig. 5, a portion of the through portion 31 extends into the first through hole 12 to be fixedly connected with the inner connecting portion 11.
The through-hole portion 24 is provided at the counter-hole portion 23 such that a step is formed between the counter-hole portion 23 and the through-hole portion 24. By providing the inner connection part 11 in contact with the side of the countersink region 23 near the electrode assembly 2000, i.e., the inner connection part 11 is provided at the step and in contact with the step surface of the step, on the one hand, the contact area of the inner connection part 11 and the outer connection part 21 can be increased, thereby improving the reliability of the connection between the outer connection part 21 and the inner connection part 11; on the other hand, the side of the countersink region 23, which is close to the electrode assembly 2000, can support the inner connecting portion 11, so that the reliability of the connection between the outer connecting portion 21 and the inner connecting portion 11 is further improved; in the present embodiment, the axial direction and the vertical direction of the electrode lead-out member 100 are parallel, and the inner connecting portion 11 can always be kept in contact with the side of the countersink region 23 near the electrode assembly 2000 by gravity, so that the connection between the outer connecting portion 21 and the inner connecting portion 11 is more reliable. In addition, it is convenient for the tool to extend into the countersink region 23 to connect the outer connecting portion 21 and the inner connecting portion 11.
The contact between the inner connecting portion 11 and the side wall of the countersink region 23 can further increase the connecting area of the outer connecting portion 21 and the inner connecting portion 11, thereby improving the reliability of the connection between the outer connecting portion 21 and the inner connecting portion 11 and the overcurrent capability.
In other embodiments, the relative positions, connection positions of the inner connection portion 11 and the outer connection portion 21 may be different from the present embodiment.
In other embodiments, a recess may be formed on a side of the inner connection part away from the electrode assembly 2000, and a protrusion may be formed on a side of the outer connection part 21 close to the electrode assembly 2000, and the recess and the protrusion are engaged with each other to form a locking structure, so that the inner connection part 11 and the outer connection part 21 form a fixed connection. In other embodiments, a recess may be provided on the outer connecting portion 21, a protrusion may be provided on the inner connecting portion 11, and a locking structure may be formed by locking and matching the recess and the protrusion with each other, so that the inner connecting portion 11 and the outer connecting portion 21 form a fixed connection. In other embodiments, other components may be provided in addition to the inner and outer connection portions 11 and 21 to achieve the snap-fit engagement of the inner and outer connection portions 11 and 21. When the inner connection portion 11 and the outer connection portion 21 are fixedly connected by the snap-fit structure, there is an advantage in that the connection manner is simple and reliable, and the structure of the outer conductive member 1 can be made compact.
As shown in fig. 5 and 6, in the present embodiment, the projection of the inner connecting portion 11 along the axial direction of the electrode lead-out member 100 is located in the outer connecting portion 21, so that the radial dimension of the inner connecting portion 11 can be prevented from being larger than the radial dimension of the outer connecting portion 21, so that the outer connecting portion 21 can cover the inner connecting portion 11, and on one hand, the sealing performance of sealing the outer conductive member 1 can be improved; on the other hand, it is convenient to reduce the radial dimension of the inner connecting portion 11, thereby reducing the material consumption of the inner connecting portion 11 and reducing the material cost of the inner connecting portion 11. In other embodiments, it may be that part or all of the projection of the inner connecting portion 11 in the axial direction of the electrode lead 100 is located within the outer connecting portion 21.
As shown in fig. 5, the projection of the inner connecting portion 11 in the axial direction of the electrode lead-out member 100 is located within the projection of the cap plate through-hole 201, on the one hand, facilitating the reduction of the radial dimension of the inner connecting portion 11 to reduce the material cost; on the other hand, the cover plate assembly 1000 is convenient to be compact. In other embodiments, part or all of the internal connection 11 may be located in the projection of the cover plate through hole 201.
In other embodiments, at least part of the projection of the inner connecting portion 11 in the axial direction of the electrode lead-out member 100 is located in the outer connecting portion 21, and the projection of the inner connecting portion 11 in the axial direction of the electrode lead-out member 100 is located in the cap plate through-hole 201, and both of these two solutions may be adopted at the same time or only one of them may be adopted.
As shown in fig. 3 and 5, the cover assembly 1000 further includes a sealing member 400 surrounding the through portion 31, the sealing member 400 is compressed between the connection plate 32 and the cover body 200, and sealing between the cover body 200 and the connection plate 32 is achieved by compressing the sealing member 400, so that sealing effect between the cover body 200 and the connection plate 32 is good. As shown in fig. 8, the height difference from the side of the through portion 31 away from the connection plate 32 to the side of the connection plate 32 abutting the seal 400 is H1, h1=4mm, and it is possible to avoid inconvenience in mounting the seal 400 and the cap plate body 200 due to too small H1, and it is possible to avoid that the cap plate assembly 1000 is not compact due to too large H1 in the axial direction of the electrode lead-out 100. In other embodiments, h1=0.3 mm may be possible, h1=2 mm may be possible. In other embodiments, H1 is 0.3 mm.ltoreq.H2 is 4mm, H1 is less than 0.3mm, and H1 is more than 4mm. In other embodiments, it may be that part or all of the seal 400 is compressed between the web 32 and the cover plate body 200.
In the present embodiment, H1 is greater than the height of the seal 400 in the initial state, so that other components are arranged in the range corresponding to H1. In other embodiments, H1 may be less than the height of seal 400 in the initial state.
As shown in fig. 3 and 5, the cover assembly 1000 further includes a support 300, and a portion of the support 300 is located between the cover body 200 and the outer conductive member 1; the support 300 is provided for supporting the outer conductive member 1 on the one hand; on the other hand, for isolation of the outer conductive member 1 and the cap plate body 200, thereby achieving insulation.
As shown in fig. 5 and 6, the support 300 has a support protrusion 301 on a side facing the electrode assembly 2000, and the support protrusion 301 is located between an outer wall of the through-portion 31 and an inner wall of the cap through-hole 201. The supporting member convex portion 301 extends into the cover plate through hole 201 to isolate the cover plate through hole 201 and the through portion 31 of the cover body, so that the through portion 31 and the cover plate through hole 201 are insulated. The support protrusion 301 extends into the cap through hole 201, so that the insulation between the outer conductive member 1 and the cap body 200 can be made better. The supporting piece 300 and the sealing piece 400 are abutted in the cover plate through hole 201 by arranging the supporting piece convex part 301, so that on one hand, the through part 31 of the inner conductive piece 3 and the cover plate through hole 201 can be isolated, and the functions of insulation and sealing are achieved; on the other hand, the cover plate through-hole 201 and the through-portion 31 can function to prevent the support 300 and the seal 400 from coming off in abutment, so that the isolation is reliable.
In other embodiments, a protrusion of the sealing member 400 may be provided on a side of the sealing member 400 remote from the electrode assembly 2000 such that at least a portion of the protrusion of the sealing member 400 is located between the outer wall of the through-portion 31 and the inner wall of the cap plate through-hole 201, and such that the protrusion of the sealing member 400 abuts against the supporting member 300 to achieve abutment of the supporting plate and the sealing member 400. In other embodiments, the seal 400 boss and the support boss 301 may be provided simultaneously to achieve abutment of the seal 400 and the support 300 within the cover plate through hole 201. In other embodiments, the sealing member 400 protruding portion may not be provided, the supporting member protruding portion 301 may not be provided, insulation of the cover through hole 201 and the through portion 31 may be achieved by providing other insulating members, and insulation of the cover through hole 201 and the through portion 31 may be achieved by providing a safety gap between the cover through hole 201 and the through portion 31.
As shown in fig. 3 and 5, a cover groove 202 is formed on one side of the cover body 200 away from the electrode assembly 2000, and the supporting member 300 and the outer conductive member 1 are disposed in the cover groove 202, so that on one hand, the cover groove 202 can be used as a positioning mark for the supporting member 300 and the outer conductive member 1, and the cover assembly 1000 is convenient to assemble; on the other hand, it is convenient to reduce the size of the cap plate assembly 1000 in the axial direction of the electrode lead 100, so that the cap plate assembly 1000 is compact. In other embodiments, the cover recess 202 may not be provided. Specifically, the depth of the cover plate groove 202 is H2, and h2=0.5 mm in this embodiment. In other embodiments, h2=0.05 mm may be possible, h2=1.5 mm may be possible. In other embodiments, H2 may be 0.05 mm.ltoreq.H2.ltoreq.1.5 mm, H2 < 0.05mm, H2 > 1.5mm. The depth of the cover plate groove 202 is between 0.05mm and 1.5mm, so that the inconvenient processing caused by too shallow depth of the cover plate groove 202 can be avoided, and the influence of too deep depth of the cover plate groove 202 on the structural strength can be avoided.
As shown in fig. 3, the inner contour of the cover groove 202 is square, the outer contour of the support 300 is also square, and the outer contour of the support 300 and the inner contour of the cover groove 202 are matched with each other. The cover plate groove 202 adopts a square non-circular outline, so that on one hand, the cover plate assembly 1000 can be conveniently positioned when assembled; on the other hand, the support 300 and the electrode lead 100 can be prevented from rotating relative to the cap body 200, thereby preventing the electrode lead 100 from rotating to cause connection drop and improving the reliability of the cap assembly 1000. In other embodiments, the inner contour of the cover plate groove 202 may also be triangular, pentagonal, or other polygonal shapes, or elliptical, or other non-circular contours for rotation and positioning. In other embodiments, the inner profile of the cover plate groove 202 may be rounded. In other embodiments, 0.05 mm.ltoreq.H2.ltoreq.1.5 mm, the inner contour of the cover plate groove 202 adopts a non-circular contour, and the two technical schemes can be adopted simultaneously or only any one of the two technical schemes can be adopted.
As shown in fig. 5 and 6, in the present embodiment, the thickness of the fitting region between the inner connection portion 11 and the through portion 31 in the axial direction of the electrode lead 100 is T, t=1 mm. In other embodiments, t=0.3 mm, t=0.5 mm, t=1.5 mm, t=2 mm; in other embodiments, T.ltoreq.2 mm may be 0.3 mm.ltoreq.T.ltoreq.2 mm, T < 0.3mm may be T > 2mm; when the thickness of the inner connecting portion 11 is between 0.3mm and 2mm, the structure of the cover plate assembly 1000 along the axial direction of the electrode lead-out member 100 is not compact due to the overlarge T can be avoided, the inconvenience of connecting the inner connecting portion 11 with the outer connecting portion 21 due to the overlarge T can be avoided, the contact area between the inner wall of the first through hole 12 and the through portion 31 can be ensured, and the reliability of connection is improved; when T is between 0.5mm and 1.5mm, the effect is better.
As shown in fig. 6, in the present embodiment, the first through hole 12 is a circular through hole with a diameter D, d=4mm. In other embodiments, d=3 mm, d=5 mm, d=10 mm, d=12 mm; in other embodiments, D may be 3 mm.ltoreq.D.ltoreq.12 mm, D < 3mm, D > 12mm; when the diameter of the inner connecting portion 11 is between 3mm and 12mm, the contact area of the inner wall of the first through hole 12 and the through portion 31 can be ensured, thereby improving the reliability of connection; the effect is better when the diameter of the inner connecting portion 11 is between 5mm and 10 mm. In other embodiments, the first through hole 12 may be a non-circular through hole, so as to prevent the through part protrusion 36 from rotating relative to the first through hole 12, thereby preventing the inner conductive member 3 from rotating to cause the connection to fall off, and improving the reliability of the cover plate assembly 1000.
In other embodiments, T is more than or equal to 0.3mm and less than or equal to 2mm, D is more than or equal to 3mm and less than or equal to 12mm, and the two technical schemes can be adopted simultaneously or only one of the two technical schemes can be adopted.
As shown in fig. 3 and 5, the cap assembly 1000 further includes a lower plastic 500, and the lower plastic 500 is made of plastic for insulation and sealing of the cap body 200 on the side facing the electrode assembly 2000. The materials of the sealing member 400 and the supporting member 300 in this embodiment are plastic, which has insulation and sealing effects. In other embodiments, the materials of the seal 400 and the support 300 may be different from the present embodiment.
Example 2
Fig. 10-12 are schematic partial structures of a cover assembly 1000 according to embodiment 2 of the present utility model.
As shown in fig. 11 and 12, the second through hole 22 includes a through hole portion 24 and a countersink portion 23, the countersink portion 23 is located on a side of the outer connection portion 21 away from the electrode assembly 2000, the through hole portion 24 is provided in a middle portion of the countersink portion 23, and the through hole portion 24 and the countersink portion 23 form a step.
As shown in fig. 10 and 12, the inner connecting portion 11 has an L-shaped cross section in the axial direction of the electrode lead 100, and specifically, the inner connecting portion 11 has a first extending portion 13 and a second extending portion 14, the first extending portion 13 extending in the radial direction of the inner connecting portion 11, and the second extending portion 14 extending from a side of the first extending portion 13 away from the first through hole 12 toward a side away from the electrode assembly 2000 in the axial direction of the electrode lead 100.
As shown in fig. 12, the inner connecting portion 11 is disposed at the countersink region 23, the side of the second extension portion 14 of the inner connecting portion 11, which is far from the first through hole 12, is in contact with the side wall of the countersink region 23, and the side of the first extension portion 13, which is close to the electrode assembly 2000, is in contact with the side of the countersink region 23, which is close to the electrode assembly 2000, so that the inner connecting portion 11 and the outer connecting portion 21 are in two-sided contact, on the one hand, the contact area of the inner connecting portion 11 and the outer connecting portion 21 can be increased, and the reliability of the connection of the inner connecting portion 11 and the outer connecting portion 21 can be improved; on the other hand, the side of the countersink region 23 of the outer connecting portion 21 adjacent to the electrode assembly 2000 and the first extension 13 are in contact to support the inner connecting portion 11, and the side wall of the countersink region 23 is in contact with the second extension 14 of the inner connecting portion 11 to make the support of the inner connecting portion 11 by the outer connecting portion 21 more reliable.
As shown in fig. 11, a clamping groove 25 is formed on one side of the outer conductive member 1, which is close to the electrode assembly 2000; the support 300 is provided with a clamping block, the clamping block and the clamping groove 25 are mutually clamped to form an anti-rotation structure, so that the support 300 and the outer conductive member 1 are prevented from rotating mutually, the electrode lead-out member 100 is prevented from being connected and falling off due to the rotation of the support 300 or the cover plate body 200 relatively, and the reliability of the cover plate assembly 1000 is improved. In other embodiments, a clamping block may be provided on the outer conductive member 1, and a clamping groove 25 is provided on the supporting member 300, and the clamping block and the clamping groove 25 are clamped with each other to form an anti-rotation structure. In other embodiments, the mating contours of the support 300 and the outer conductor 1 may be configured to be non-circular to form an anti-rotation structure; or by additional components and the outer conductive member 1, the support member 300.
Other structures of this embodiment refer to embodiment 1 and other embodiments.
Example 3
Fig. 13-15 are schematic partial structures of a cover assembly 1000 according to embodiment 3 of the present utility model.
As shown in fig. 14 and 15, the second through hole 22 includes a through hole portion 24 and a countersink portion 23, the countersink portion 23 is located on a side of the outer connection portion 21 away from the electrode assembly 2000, the through hole portion 24 is provided in a middle portion of the countersink portion 23, and the through hole portion 24 and the countersink portion 23 form a step.
As shown in fig. 13 and 15, the cross section of the inner connecting portion 11 along the axial direction of the electrode lead 100 is L-shaped; specifically, the inner connecting portion 11 has a first extending portion 13 and a second extending portion 14, the first extending portion 13 extending in the radial direction of the inner connecting portion 11, the second extending portion 14 extending from a side of the first extending portion 13 near the first through hole 12 toward a side near the electrode assembly 2000 in the axial direction of the electrode lead 100.
As shown in fig. 15, the inner connecting portion 11 is disposed at the through hole portion 24, is hung upside down on the countersink hole portion 23, and the side of the second extending portion 14 of the inner connecting portion 11, which is away from the first through hole 12, is in contact with the side wall of the through hole portion 24, and the side of the first extending portion 13, which is close to the electrode assembly 2000, is in contact with the side of the countersink hole portion 23, which is close to the electrode assembly 2000, so that the inner connecting portion 11 and the outer connecting portion 21 are in two-sided contact, on the one hand, the contact area of the inner connecting portion 11 and the outer connecting portion 21 can be increased, thereby improving the reliability of the connection of the inner connecting portion 11 and the outer connecting portion 21; on the other hand, the side of the countersink region 23 of the outer connecting portion 21, which is close to the electrode assembly 2000, is in contact with the first extension portion 13 to form a support for the inner connecting portion 11, and the side wall of the through hole 24 is in contact with the second extension portion 14 of the inner connecting portion 11 to make the support of the inner connecting portion 11 by the outer connecting portion 21 more reliable. In addition, when the outer connecting portion 21 and the inner connecting portion 11 are welded, the depth of weldability can be increased, and the reliability of the connection between the inner connecting portion 11 and the outer connecting portion 21 can be further improved.
As shown in fig. 15, the side of the first extension portion 13 of the inner connecting portion 11, which is far from the first through hole 12, is abutted against the side wall of the countersink region 23, so that the contact surface between the inner connecting portion 11 and the outer connecting portion 21 is increased, three-sided contact is formed, the contact area between the inner connecting portion 11 and the outer connecting portion 21 can be further increased, and the reliability of the electrical connection between the inner connecting portion 11 and the outer connecting portion 21 can be improved.
Other structures of this embodiment refer to embodiment 1 and other embodiments.
Example 4
Fig. 16-18 are schematic partial structures of a cover assembly 1000 according to embodiment 4 of the present utility model.
As shown in fig. 17 and 18, the second through hole 22 includes a through hole portion 24 and a countersink portion 23, the countersink portion 23 is located on a side of the outer connection portion 21 away from the electrode assembly 2000, the through hole portion 24 is provided in a middle portion of the countersink portion 23, and the through hole portion 24 and the countersink portion 23 form a step.
As shown in fig. 16 and 18, the cross section of the inner connecting portion 11 along the axial direction of the electrode lead 100 is Z-shaped; specifically, the inner connecting portion 11 has a first extending portion 13, a second extending portion 14, and a third extending portion 15, the first extending portion 13 extending in the radial direction of the inner connecting portion 11, the second extending portion 14 extending from a side of the first extending portion 13 remote from the first through hole 12 toward a side remote from the electrode assembly 2000 in the axial direction of the electrode lead 100, and the third extending portion 15 extending from a side of the first extending portion 13 near the first through hole 12 toward a side near the electrode assembly 2000 in the axial direction of the electrode lead 100.
As shown in fig. 18, the inner connecting portion 11 is provided at the second through hole 22, the side of the third extension portion 15 of the inner connecting portion 11, which is far from the first through hole, is in contact with the side wall of the through hole portion 24, the side of the first extension portion 13, which is near to the electrode assembly 2000, is in contact with the side of the counter bore portion 23, which is near to the electrode assembly 2000, and the side of the second extension portion 14, which is far from the first through hole 12, is in contact with the side wall of the counter bore portion 23, so that the inner connecting portion 11 and the outer connecting portion 21 form three-sided contact, and on the one hand, the contact area of the inner connecting portion 11 and the outer connecting portion 21 can be increased, thereby improving the reliability of the connection of the inner connecting portion 11 and the outer connecting portion 21; on the other hand, the contact of the side of the countersink region 23 of the outer connecting portion 21, which is close to the electrode assembly 2000, with the first extension portion 13 can form a support for the inner connecting portion 11, and the contact of the side wall of the through hole 24 with the third extension portion 15 of the inner connecting portion 11, and the contact of the side wall of the countersink region 23 with the second extension portion 14 of the inner connecting portion 11 can make the support of the inner connecting portion 11 by the outer connecting portion 21 more reliable. In addition, when the outer connecting portion 21 and the inner connecting portion 11 are welded, the depth of weldability can be increased, and the reliability of the connection between the inner connecting portion 11 and the outer connecting portion 21 can be further improved.
Other structures of this embodiment refer to embodiment 1 and other embodiments.
While specific embodiments of the utility model have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and the scope of the utility model is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the principles and spirit of the utility model, but such changes and modifications fall within the scope of the utility model.

Claims (21)

1. A cover plate assembly, comprising:
the cover plate body is provided with a through cover plate through hole;
the electrode lead-out piece comprises an outer conductive piece and an inner conductive piece, the inner conductive piece comprises a through part and a connecting plate, at least part of the through part is penetrated through the cover plate through hole, and the connecting plate is positioned on one side of the cover plate body, facing the electrode assembly;
the connecting plate comprises a first connecting part, a transitional connecting part and a second connecting part which are sequentially connected, wherein the first connecting part is connected with the through part, the second connecting part is used for being electrically connected with a tab led out by the electrode assembly, the outer conductive part comprises an outer connecting part and an inner connecting part which are fixedly connected, the outer connecting part is used for being electrically connected with the connecting sheet, the inner connecting part is electrically connected with the inner conductive part, a first through hole is formed in the inner connecting part, a second through hole is formed in the outer connecting part, and the inner connecting part is at least partially positioned in the second through hole;
The projection of the first through hole along the axial direction of the electrode lead-out piece is at least partially positioned in the second through hole.
2. The cover plate assembly of claim 1, wherein the material of the inner connection portion and the outer connection portion are two different metal materials, and the material of the inner connection portion and the inner conductive member are the same metal material.
3. The cover plate assembly according to claim 1 or 2, wherein the inner connection portion and the outer connection portion are integrally provided, and the inner connection portion and the outer connection portion are fixedly connected by welding.
4. The cover plate assembly of claim 1, wherein the inner and outer connecting portions are integrally provided, the inner and outer connecting portions being fixedly connected by cooperating snap-fit formations, at least a portion of the inner and outer connecting portions being fixedly connected at the interface by welding.
5. The cover plate assembly of claim 1, wherein the second through hole comprises a through hole portion and a countersink portion, the countersink portion is located on a side of the outer connection portion away from the electrode assembly, the through hole portion is provided in the middle of the countersink portion and forms a step with the through hole portion, at least a portion of the inner connection portion is in contact with a side of the countersink portion near the electrode assembly, and at least a portion of the through portion extends into the first through hole and is fixedly connected with the inner connection portion.
6. The cover plate assembly of claim 5, wherein the cross section of the inner connecting portion along the axial direction of the electrode lead-out member is L-shaped;
the inner connecting part is contacted with the side wall of the through hole part;
or, the inner connecting portion is in contact with the side wall of the counter bore portion.
7. The cover plate assembly of claim 5, wherein the cross section of the inner connecting portion along the axial direction of the electrode lead-out member is Z-shaped, and the inner connecting portion is in contact with the side wall of the through hole portion and the side wall of the countersink portion.
8. The cap plate assembly according to claim 1, wherein the through portion is provided with an inner conductive member recess on a side facing the electrode assembly, and the cap plate body, the case of the battery and the inner surface of the inner conductive member recess define a hermetically sealed cavity together.
9. The cover plate assembly of claim 1, wherein a projection of the inner connection portion along an axial direction of the electrode lead is located within the outer connection portion;
and/or the projection of the inner connecting part along the axial direction of the electrode lead-out piece is positioned in the cover plate through hole.
10. The cover assembly of claim 1, further comprising a seal surrounding the through-portion, at least a portion of the seal being compressed between the web and the cover body;
And/or the cover plate assembly further comprises a support member, at least part of which is located between the cover plate body and the outer conductive member.
11. The cover plate assembly of claim 10, wherein a height difference from a side of the through portion remote from the connection plate to a side of the connection plate abutting the seal is H1,0.3mm ∈h1 ∈4mm;
and/or, a support protrusion is arranged on one side of the support facing the electrode assembly, and at least part of the support protrusion is positioned between the outer wall of the through part and the inner wall of the cover plate through hole.
12. The cap plate assembly according to claim 10, wherein a side of the support facing the electrode assembly has a support protrusion, at least a portion of the support protrusion being located between an outer wall of the through portion and an inner wall of the cap plate through hole, the support protrusion and the seal abutting within the cap plate through hole;
and/or, one side of the sealing member, which is far away from the electrode assembly, is provided with a sealing member convex part, at least part of the sealing member convex part is positioned between the outer wall of the through part and the inner wall of the cover plate through hole, and the sealing member convex part is abutted against the supporting member.
13. The cap plate assembly of claim 10, wherein a side of the cap plate body remote from the electrode assembly has a cap plate groove, and the support member and the outer conductive member are disposed in the cap plate groove.
14. The cover plate assembly of claim 13 wherein the cover plate groove has a depth H2,0.05mm < H2 < 1.5mm;
and/or the inner contour of the cover plate groove is a non-circular contour, and the outer contour of the supporting piece is matched with the inner contour of the cover plate groove.
15. The cover assembly of claim 10, wherein cooperating anti-rotation structures are provided between the outer conductive member and the support member.
16. The cap plate assembly of claim 1, wherein a side of the through-part remote from the electrode assembly has a through-part protrusion passing through and engaged at the first through-hole.
17. The cover plate assembly of claim 16, wherein the through-part protrusion and the inner connection part form a fixed connection at the first through-hole by welding.
18. The cover plate assembly according to any one of claims 1, 4, 5, 16, wherein a thickness of the inner connecting portion and the through portion fitting region is T,0.3mm ∈t ∈2mm in an axial direction of the electrode lead-out member;
And/or the first through hole is a circular through hole, and the diameter is D, and D is more than or equal to 3mm and less than or equal to 12mm.
19. The cover plate assembly of claim 1 or 16, wherein the first through hole is a circular through hole;
or, the first through hole is a non-circular through hole.
20. A battery, characterized in that it comprises:
a housing;
the cover assembly of any one of claims 1-19, being disposed over the housing and defining with the housing a receiving cavity;
and the battery cell is accommodated in the accommodating cavity and is connected with an electrode assembly.
21. An electronic device comprising the battery of claim 20.
CN202320765228.4U 2023-04-07 2023-04-07 Cover plate assembly, battery and electronic equipment Active CN219419450U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202320765228.4U CN219419450U (en) 2023-04-07 2023-04-07 Cover plate assembly, battery and electronic equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202320765228.4U CN219419450U (en) 2023-04-07 2023-04-07 Cover plate assembly, battery and electronic equipment

Publications (1)

Publication Number Publication Date
CN219419450U true CN219419450U (en) 2023-07-25

Family

ID=87239347

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202320765228.4U Active CN219419450U (en) 2023-04-07 2023-04-07 Cover plate assembly, battery and electronic equipment

Country Status (1)

Country Link
CN (1) CN219419450U (en)

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