CN115441129A - Connecting piece, battery package and consumer - Google Patents
Connecting piece, battery package and consumer Download PDFInfo
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- CN115441129A CN115441129A CN202211148218.2A CN202211148218A CN115441129A CN 115441129 A CN115441129 A CN 115441129A CN 202211148218 A CN202211148218 A CN 202211148218A CN 115441129 A CN115441129 A CN 115441129A
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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
- H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
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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
- H01M50/531—Electrode connections inside a battery casing
- H01M50/536—Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by welding
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- Connection Of Batteries Or Terminals (AREA)
Abstract
The application discloses connecting piece, battery package and consumer relates to battery technical field. This connecting piece includes: the connecting piece comprises a first connecting part and a second connecting part connected with the first connecting part, wherein the first connecting part is provided with a plurality of first welding holes formed on a first surface of the connecting piece in the thickness direction, and the depth of each first welding hole is smaller than the thickness of the first connecting part; the first welding hole comprises a conical hole section, the large hole end of the conical hole section is located on the first surface in the thickness direction of the connecting piece, and the hole wall of the first welding hole is used for reflecting laser for multiple times during welding. In this application embodiment, treat the second face orientation of the thickness direction of connecting piece with first connecting portion welded electrode terminal, and then when carrying out laser penetration welding at the first face of the thickness direction of connecting piece, the perpendicular laser of shooting to first connecting portion can carry out multiple reflection at the pore wall in first welding hole to realize absorbing many times laser energy, thereby reduce the waste of laser energy, guarantee the welding effect simultaneously.
Description
Technical Field
The application relates to the technical field of batteries, in particular to a connecting piece, a battery pack and electric equipment.
Background
With the vigorous development of electronic products, the requirements on batteries are higher and higher in the use process. Among them, the battery generally includes a case, an electrode assembly, a cap plate assembly, and electrode terminals, and tabs of the electrode assembly are connected to the electrode terminals by connectors.
Among them, the welding effect between the connecting member and the electrode terminal determines the assembly yield of the battery, and therefore, how to optimize the connection between the connecting member and the electrode terminal to improve the assembly yield of the battery becomes a problem to be solved urgently.
Disclosure of Invention
A primary object of the present application is to provide a connecting member, a battery pack, and an electric device, which can optimize a welding effect with an electrode terminal.
In order to achieve the purpose of the application, the following technical scheme is adopted in the application:
according to an aspect of the present application, there is provided a connector, comprising:
a first connection portion and a second connection portion connected to the first connection portion;
the first connecting part is provided with a plurality of first welding holes formed on a first surface of the connecting part in the thickness direction, and the depth of each first welding hole is smaller than the thickness of the first connecting part;
the first welding hole comprises a conical hole section, the large hole end of the conical hole section is located on the first surface of the connecting piece in the thickness direction, and the hole wall of the first welding hole is used for reflecting laser for multiple times during welding.
In this application embodiment, with the second face towards electrode terminal of the thickness direction of connecting piece, and then when carrying out the laser penetration welding at the first face of the thickness direction of connecting piece, the perpendicular shooting can carry out multiple reflection at the pore wall in welding hole to the laser of the first connecting portion of perpendicular shooting to realize absorbing laser energy many times, thereby reduce and avoid laser energy's waste even, guarantee the welding effect simultaneously. In addition, after the laser energy is absorbed for a plurality of times, even if the laser reflecting out of the first welding hole exists, the safety risk of the welding equipment and even an operator is not brought. Moreover, due to the arrangement of the first welding holes, the thickness of the connecting piece at the first connecting part is reduced, so that the welding power is convenient to reduce, and the welding effect is ensured.
According to an embodiment of the application, the first welding hole further comprises an accommodating cavity section located on one side of the conical hole section far away from the first face and communicated with the conical hole section.
In the embodiment of the application, through the setting that holds the chamber section, when laser reachs and holds the chamber section, the laser energy of absorption laser of ability furthest even realizes that the laser energy of laser is absorbed by first connecting portion completely to improve the absorption effect of laser energy.
According to an embodiment of the application, the receiving cavity section is in the shape of a circular truncated cone or a segment of a sphere.
In the embodiment of the application, the accommodating cavity section is arranged to be in a circular truncated cone shape or a spherical segment shape, so that the process difficulty is reduced, and the machining efficiency of the connecting piece is improved.
According to an embodiment of the present application, the tapered bore section is a conical bore or a pyramid bore.
In the embodiment of the application, the conical hole is taken as an example, the conical hole section is set to be the conical hole, the hole wall area of the conical hole section can be increased, and therefore the reflection area of laser is increased, and the absorption area of laser energy is improved.
According to an embodiment of the present application, the hole wall of the conical hole section is convex or concave arc surface-shaped.
In the embodiment of the application, the hole wall of the conical hole section is arranged to be a convex arc surface or a concave arc surface, and compared with a conical hole, the hole diameter of the hole opening of the conical hole section can be reduced under the condition that the depth of the conical hole section is certain, so that a larger number of first welding holes can be formed on the first surface of the connecting piece in the thickness direction; the cavity volume of the conical hole section can be reduced, so that the material conveying amount during stamping is reduced, and the conical hole section is convenient to process.
According to an embodiment of the present application, a maximum included angle between a tangent line on the same plane as the center line of the first welding hole on the hole wall of the tapered hole section and the center line of the first welding hole is less than or equal to 30 degrees.
In this application embodiment, through the biggest contained angle of the tangent line on the pore wall of injecing the taper hole section and the central line of welding hole to guarantee that vertical incidence's laser can reflect 3 times at least at the pore wall of taper hole section, thereby realize the high-efficient absorption to laser energy.
According to an embodiment of the present application, the second connection portion has at least one recess formed in a first surface of the connection member in a thickness direction, and a depth of the recess is smaller than a thickness of the second connection portion.
In the embodiment of the application, the second connecting part is provided with the recess, so that the welding protection plate is limited, the welding efficiency of the second connecting part and the electrode assembly is improved, and the welding effect is ensured.
According to an embodiment of the present application, the second connection portion includes a first sub-connection portion and a second sub-connection portion;
the first sub-connection portion and the second sub-connection portion are located on two opposite sides of the first connection portion in a direction perpendicular to a thickness direction of the connection member, and the first sub-connection portion and/or the second sub-connection portion have the recess.
In the embodiments of the present application, the second connection part is provided as the first sub-connection part and the second sub-connection part, and the recess is provided in at least one of the first sub-connection part and the second sub-connection part, so that the connection member and the plurality of electrode assemblies can be welded, and the welding efficiency of the sub-connection part and the corresponding electrode assembly can be improved.
According to an embodiment of the present application, a depth of the first welding hole is less than or equal to 4/5 of a thickness of the first connection portion.
In this application embodiment, through the big or small relation of the degree of depth of injecing first welding hole and the thickness of first connecting portion to under the prerequisite of the self intensity of guaranteeing first connecting portion, improve the welding effect of first connecting portion.
According to an embodiment of the present application, the second connection portion has a plurality of second welding holes formed in a first surface of the connection member in a thickness direction, a depth of the second welding holes is smaller than a thickness of the second connection portion, and a shape of the second welding holes is the same as a shape of the first welding holes.
In the embodiment of the application, the second welding hole is formed in the second connecting part, so that ultrasonic energy is effectively absorbed when the second connecting part is welded with the electrode assembly, and the welding effect is improved.
According to another aspect of the present application, there is provided a battery including:
a housing having an opening;
an electrode assembly housed within the case;
a cover plate assembly closing the opening;
an electrode terminal disposed through the cap assembly; and
the connector as described in the above-mentioned aspect,
wherein a first face of the connecting member in a thickness direction faces the electrode assembly, a second face of the connecting member in the thickness direction faces the cap plate assembly, the first connecting portion is welded to the electrode terminal, and the second connecting portion is welded to the electrode assembly.
In the embodiment of the application, combine above-mentioned one aspect the connecting piece, when carrying out laser penetration welding, can reduce or even avoid the waste of laser energy to guaranteed the welding effect, and then improved the yield of battery assembly, the life of extension battery has improved the security that the battery used.
According to yet another aspect of the present application, there is provided a battery pack including at least one battery according to the above another aspect.
In the embodiment of the present application, in combination with the above, when the service life of the battery is prolonged and the safety of the battery in use is improved, the service life of the battery pack including the battery is correspondingly prolonged, and the safety of the battery in use is also correspondingly improved.
According to still another aspect of the present application, there is provided an electric device including the battery pack according to still another aspect.
In the embodiment of the present application, in combination with the above, when the service life of the battery pack is prolonged and the safety of use is improved, the service life of the electric equipment including the battery pack is correspondingly prolonged, and the safety of use is correspondingly improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The above and other features and advantages of the present application will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.
FIG. 1 is a schematic top view of a connector shown in accordance with an exemplary embodiment.
Fig. 2 is a schematic cross-sectional view of a first connection portion according to an exemplary embodiment.
Fig. 3 is a schematic cross-sectional structure diagram of another first connection portion according to an exemplary embodiment.
FIG. 4 is a schematic diagram illustrating a first weld aperture according to an exemplary embodiment.
FIG. 5 is a schematic diagram illustrating another first weld hole configuration according to an exemplary embodiment.
FIG. 6 is a schematic diagram illustrating a further first weld hole configuration according to an exemplary embodiment.
Fig. 7 is a schematic cross-sectional structure diagram of still another first connection portion according to an exemplary embodiment.
FIG. 8 is a schematic diagram illustrating a further first weld hole configuration according to an exemplary embodiment.
Fig. 9 is a schematic cross-sectional view illustrating still another first connection portion according to an exemplary embodiment.
FIG. 10 is a schematic diagram illustrating a further configuration of a first weld aperture according to an exemplary embodiment.
FIG. 11 is a schematic diagram illustrating a top view of another connector according to an exemplary embodiment.
FIG. 12 is a schematic diagram of an axial side configuration of yet another connector, according to an exemplary embodiment.
Fig. 13 is a schematic cross-sectional view illustrating still another first connection portion according to an exemplary embodiment.
FIG. 14 is a schematic diagram illustrating yet another first weld aperture according to an exemplary embodiment.
Fig. 15 is a schematic diagram illustrating a structure of a battery according to an exemplary embodiment.
Wherein the reference numerals are as follows:
100. a battery;
10. a housing; 20. an electrode assembly; 30. a cover plate assembly; 40. a connecting member; 50. an electrode terminal;
41. a first connection portion; 42. a second connecting portion; 43. a first welding hole; 44. a groove; 45. a second weld hole;
421. a first sub-connection portion; 422. a second sub-connection portion; 423. recessing;
431. a tapered bore section; 432. a cavity section is received.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed description will be omitted.
In the related art, the connecting member and the electrode terminal are welded by laser penetration welding. When laser penetration welding is carried out, the connecting piece is a metal piece, and the reflecting capacity of the connecting piece to laser is strong, so that the laser energy absorbed by the connecting piece is less, the waste of the laser energy is caused, the welding effect is influenced, and the probability of false welding is increased; in addition, the reflected laser light may also pose a safety risk to the welding equipment and even the operator.
The present embodiment provides a connector 40. As shown in fig. 1 and 2, the connecting member 40 includes: a first connection portion 41 and a second connection portion 42 connected to the first connection portion 41, the first connection portion 41 having a plurality of first welding holes 43 formed on a first surface of the connector 40 in a thickness direction, a depth of the first welding holes 43 being smaller than a thickness of the first connection portion 41; the first welding hole 43 includes a tapered hole section 431, a large hole end of the tapered hole section 431 is located on a first surface in the thickness direction of the connecting member 40, and a hole wall of the first welding hole 43 is used for reflecting the laser light multiple times during welding.
In the embodiment of the present application, the second surface of the connecting member 40 in the thickness direction is used to face the electrode terminal 50, and when the first surface of the connecting member 40 in the thickness direction is subjected to laser penetration welding, the laser perpendicularly emitted to the first connecting portion 41 can be reflected multiple times on the hole wall of the first welding hole 43, so that multiple absorption of laser energy is realized, and the welding effect is ensured; under the condition of absorbing the laser energy for many times, the waste of the laser energy is reduced and even avoided, so that the welding power can be reduced on the premise of ensuring the welding effect; in addition, even if the laser light reflected out of the first welding hole 43 exists after the first connecting portion 41 absorbs the laser energy a plurality of times, there is no safety risk to the welding equipment or even the operator.
The large aperture end of the tapered aperture section 431 is located on the first surface of the connecting member 40 in the thickness direction, that is, when the tapered aperture section 431 is observed on the first surface of the connecting member 40 in the thickness direction, the tapered aperture section 431 is in an inverted shape.
In some embodiments, as shown in fig. 3, a first surface of the connection member 40 in the thickness direction is formed with a groove 44 at the first connection portion 41, and a groove bottom of the groove 44 is formed with a plurality of first welding holes 43.
In this way, by the arrangement of the groove 44, the thickness of the first connection portion 41 can be further reduced on the basis of the first welding hole 43, so that the welding effect of the first connection portion 41 and the electrode terminal 50 can be ensured, and the welding power and the cost can be further reduced.
In the embodiment of the present application, the plurality of first welding holes 43 can be spaced and closely distributed at the first connecting portion 41, so that the thickness of the first connecting portion 41 can be reduced as a whole, thereby facilitating the reduction of welding power and simultaneously ensuring the welding effect.
Wherein the hole depth of the first welding hole 43 is smaller than the thickness of the first connection portion 41, and for the case where the first connection portion 41 has the groove 44, the hole depth of the first welding hole 43 is smaller than the thickness of the first connection portion 41 at the groove 44 (i.e., the distance between the groove bottom of the groove 44 and the second face in the thickness direction of the connection member 40). The hole depth of the first welding hole 43 may be determined according to the material of the connecting member 40, as long as the overall strength of the connecting member 40 can be ensured while avoiding welding through the first connecting portion 41 when welding in the first welding hole 43. Illustratively, the hole depth of the first welding hole 43 is less than or equal to 4/5 of the thickness of the first connection portion 41.
In some embodiments, the tapered bore section 431 is a conical bore or a pyramidal bore. Illustratively, as shown in fig. 2, the tapered bore section 431 is a conical bore, i.e., the first welding bore 43 is an inverted conical bore.
Wherein the apex angle of the tip of the tapered bore section 431 is less than or equal to 60 degrees. Exemplarily, taking a conical hole as an example, an included angle between a generatrix of the conical hole and a central line is less than or equal to 30 degrees; taking a quadrangular pyramid hole as an example, the included angle between two opposite side walls is less than or equal to 60 degrees. Of course, the apex angle of the tip of the tapered bore section 431 may also be slightly greater than 60 degrees, as long as multiple reflections of the laser light on the bore wall of the tapered bore section 431, which is incident perpendicularly, can be achieved, which is not limited in the embodiment of the present application.
For example, the conical hole section 431 is taken as a conical hole, and as shown in fig. 4, an included angle θ 1 between a generatrix of the conical hole and a central line is equal to 30 degrees, at this time, laser vertically incident on the hole wall of the conical hole section 431 can be reflected for 3 times, so that laser energy can be effectively absorbed for 3 times; as shown in fig. 5, an included angle θ 2 between a generatrix of the conical hole and the central line is approximately equal to 20 degrees, and at this time, the laser vertically incident on the hole wall of the conical hole section 431 can be reflected for 4 times, so that the laser energy can be effectively absorbed for 4 times; as shown in fig. 6, an included angle θ 3 between a generatrix and a central line of the conical hole is approximately equal to 9.5 degrees, and at this time, the laser light perpendicularly incident on the hole wall of the conical hole section 431 can be reflected for 9 times, so that the laser energy can be effectively absorbed for 9 times.
In some embodiments, as shown in fig. 7 and 8, the hole wall of the tapered hole section 431 has a concave arc shape. In this way, in a case where the depth of the tapered hole section 431 is constant with respect to the conical hole or the pyramid hole, the hole diameter of the hole opening of the tapered hole section 431 can be reduced, thereby facilitating formation of a larger number of first welding holes 43 on the first surface in the thickness direction of the connecting member 40; the cavity volume of the tapered hole section 431 can be reduced, so that the material conveying amount during stamping is reduced, and the tapered hole section 431 can be conveniently machined.
In other embodiments, as shown in fig. 9 and 10, the aperture wall of the tapered aperture section 431 has a convex arcuate surface shape. In this way, in the case where the depth of the tapered hole section 431 is constant, the hole diameter of the hole of the tapered hole section 431 can be reduced, thereby facilitating formation of a greater number of first welding holes 43 on the first surface in the thickness direction of the connecting member 40; the cavity volume of the tapered hole section 431 can be reduced, so that the material conveying amount during stamping is reduced, and the processing of the tapered hole section 431 is facilitated.
Optionally, for the above-mentioned hole wall of the tapered hole section 431 being in an inward-concave arc surface shape and the hole wall being in an outward-convex arc surface shape, a maximum included angle between a tangent line on the same plane as the center line of the first welding hole 43 on the hole wall of the tapered hole section 431 and the center line of the first welding hole 43 is less than or equal to 30 degrees. Of course, the maximum included angle between the tangent line on the same plane as the center line of the first welding hole 43 on the hole wall of the tapered hole section 431 and the center line of the first welding hole 43 may also be slightly greater than 30 degrees, as long as it is ensured that the laser vertically incident on the hole wall of the tapered hole section 431 can be reflected for multiple times, which is not limited in the embodiment of the present application.
Illustratively, the hole wall of the taper hole section 431 is a concave arc-shaped structure, and as shown in fig. 8, an included angle θ 4 between a tangent line, which is located on the same plane as the center line of the first welding hole 43 at the tip end, on the hole wall of the taper hole section 431 and the center line of the first welding hole 43 is the largest and is equal to 30 degrees, and at this time, for the laser vertically incident at the bottommost part of the taper hole section 431, 3 reflections of the laser can be achieved. And for the laser incident on the hole wall at the shallower position of the conical hole section 431, the number of reflection times is more, so that the effect of effectively absorbing the laser energy is achieved.
Continuing with the example, the hole wall of the tapered hole section 431 is a convex arc-shaped structure, and as shown in fig. 10, an included angle θ 5 between a tangent line of the hole wall of the tapered hole section 431 at the same plane as the center line of the first welding hole 43 at the hole opening and the center line of the first welding hole 43 is the largest and equal to 30 degrees, and for the laser vertically incident on the hole wall at the hole opening of the tapered hole section 431, 3 reflections of the laser can be achieved. And for the laser incident on the hole wall deeper in the tapered hole section 431, the number of reflection times is more, so that the effect of effectively absorbing the laser energy is achieved.
For the above-mentioned case that the hole wall of the tapered hole section 431 is concave arc surface and the hole wall is convex arc surface, compared with the case that the hole wall is convex arc surface, the case that the hole wall is concave arc surface can increase the cavity volume of the tapered hole section 431, so that the thickness of the connecting piece 40 at the first connecting part 41 can be reduced to increase the welding effect and reduce the welding power; compared with the case that the hole wall is in the shape of an inwards concave cambered surface, the hole wall is in the shape of an outwards convex cambered surface, so that the cavity volume of the conical hole section 431 can be reduced, the overall strength of the connecting piece 40 is improved, the material conveying amount during stamping is reduced, and the conical hole section 431 can be conveniently machined.
In some embodiments, as shown in fig. 11, the second connection part 42 has a plurality of second welding holes 45 formed at a second surface of the connection member 40 in a thickness direction, and a depth of the second welding holes 45 is smaller than a thickness of the second connection part 42.
The specific structure of the second welding hole 45 is the same as the specific structure of the first welding hole 43, and the detailed description thereof is omitted in this embodiment of the application.
Like this, with the first face of the thickness direction of connecting piece 40 towards electrode subassembly 20, and then when the second face of the thickness direction of connecting piece 40 carries out laser penetration welding, the ultrasonic wave of vertical shot to second connecting portion 42 can carry out multiple reflection at the pore wall of second welding hole 45 to the realization absorbs ultrasonic energy many times, thereby reduces or even avoids ultrasonic energy's waste, guarantees the welding effect simultaneously.
In some embodiments, as shown in fig. 12, the second connection part 42 has at least one recess 423 formed at a first surface of the connection member 40 in a thickness direction, and a depth of the recess 423 is less than a thickness of the second connection part 42.
Wherein the recesses 423 are used for limit welding of the protection sheet so as to achieve the positioning of the welding of the protection sheet, thereby facilitating the improvement of the welding efficiency of the second connection portion 42 with the tabs of the electrode assembly 20 while ensuring the welding effect. The specific shape of the recess 423 may refer to a welding protection sheet, which is not limited in the embodiments of the present application.
The tabs of the electrode assembly 20 may be located at the second side of the second connection part 42 while the welding protection sheet is confined in the recesses 423, at which time ultrasonic penetration welding is performed on the welding protection sheet to accomplish welding of the second connection part 42 and the tabs of the electrode assembly 20; of course, the tabs of the electrode assembly 20 may be located at the first side of the second connection part 42, and the welding of the second connection part 42 and the tabs of the electrode assembly 20 is performed by performing the ultrasonic penetration welding at the second side of the second connection part 42.
In some embodiments, as shown in fig. 11 or 12, the second connection portion 42 includes a first sub-connection portion 421 and a second sub-connection portion 422, and the first sub-connection portion 421 and the second sub-connection portion 422 are located on opposite sides of the first connection portion 41 in a direction perpendicular to a thickness direction of the connection member 40. In this way, the tabs of the different electrode assemblies 20 can be welded separately through the first and second sub-connection parts 421 and 422, thereby increasing the capacity of the battery 100.
As shown in fig. 11 or 12, the end portions of the first sub-connecting portion 421 and the second sub-connecting portion 422 extend out of the first connecting portion 41. As such, the regions of the first and second sub-connection parts 421 and 422 to which the tabs are welded may be located at portions protruding beyond the first connection part 41 to increase the distance from the first connection part 41, thereby reducing the situation of assembly interference.
In the case where the second connection portion 42 has the second welding hole 45, a plurality of second welding holes 45 are formed on the second surface of the connection member 40 in the thickness direction at the first sub-connection portion 421 and/or the second sub-connection portion 422. Illustratively, as shown in fig. 11, the second face of the connection member 40 in the thickness direction is formed with a plurality of second welding holes 45 at the first and second sub-connection portions 421 and 422 to simultaneously secure the welding effect of the first and second sub-connection portions 421 and 422 and the plurality of electrode assemblies 20.
In the case where the second connection portion 42 has the recess 423, the recess 423 is formed on the first surface of the connection member 40 in the thickness direction at the first sub-connection portion 421 and/or the second sub-connection portion 422. Illustratively, as shown in fig. 12, a first surface of the connection member 40 in a thickness direction is formed with recesses 423 at the first and second sub-connection parts 421 and 422 to simultaneously secure a welding effect of the connection member 40 with the plurality of electrode assemblies 20.
In some embodiments, as shown in fig. 13 and 14, the first welding hole 43 further includes a receiving cavity section 432 located on a side of the tapered hole section 431 away from the first face of the connecting member 40 and communicating with the tapered hole section 431. So, through the setting that holds chamber section 432, when laser reachd and hold chamber section 432, the laser energy of absorption laser of ability furthest, the laser energy of realization laser is absorbed by first connecting portion 41 completely even to effectively promote the absorption efficiency of laser energy, improve the welding effect.
Wherein, the accommodating cavity section 432 is in a shape of a circular truncated cone or a segment of a sphere. Of course, the receiving cavity section 432 may have other shapes as long as the laser can be limited to the receiving cavity section 432 to the maximum extent, which is not limited in the embodiment of the present application. Illustratively, as shown in fig. 14, the receiving cavity section 432 is frustoconical.
When the first welding hole 43 includes the inverted taper hole section 431 and the accommodating cavity section 432 communicating with the taper hole section 431, in order to facilitate the processing of the first welding hole 43, the connecting member 40 is formed by sequentially stacking a plurality of metal sheets, and the metal sheets are processed correspondingly before the metal sheets are sequentially stacked.
Illustratively, the first welding hole 43 includes an inverted conical hole and a truncated cone-shaped receiving cavity communicating with the conical hole, and the connecting member 40 may include three layers of metal sheets having the same size and shape, where one layer of metal sheet is processed to form a truncated cone-shaped through hole, and one layer of metal sheet is processed to form a conical hole, and then the two processed metal sheets and the unprocessed metal sheet are stacked.
The metal sheet with the circular truncated cone-shaped through hole is positioned between an unprocessed metal sheet and the metal sheet with the conical hole, and the large-diameter end of the circular truncated cone shape and the small-diameter end of the conical hole face the unprocessed metal sheet.
The present embodiment provides a battery 100. As shown in fig. 15, the battery 100 includes a case 10, an electrode assembly 20, a cap plate assembly 30, and an electrode terminal 50, and the connection member 40 according to the above-described embodiment, the case 10 having an opening, the electrode assembly 20 being received in the case 10, the cap plate assembly 30 closing the opening of the case 10, and the electrode terminal 50 being disposed through the cap plate assembly 30. The first surface of the connection member 40 in the thickness direction faces the electrode assembly 20, the second surface of the connection member 40 in the thickness direction faces the cap assembly 30, the first connection part 41 is welded to the electrode terminal 50, and the second connection part 42 is welded to the electrode assembly 20.
In combination with the above-mentioned connecting piece 40, because the first welding hole 43 is arranged on the first connecting portion 41, when laser penetration welding is performed, waste of laser energy can be reduced or even avoided, so that a welding effect is ensured, the yield of assembly of the battery 100 is improved, the service life of the battery 100 is prolonged, and the use safety of the battery 100 is improved.
The embodiment of the present application also provides a battery pack including at least one battery 100 according to the above embodiment. As described above, in the case where the service life of the battery 100 is prolonged and the safety of the use of the battery 100 is improved, the service life of the battery pack including the battery 100 is prolonged and the safety of the use is improved.
The embodiment of the application also provides electric equipment which can be energy storage equipment, a vehicle and the like. The electric equipment comprises the battery pack according to the above embodiment. As described above, in the case where the service life of the battery pack is prolonged and the safety of use is improved, the service life of the electric device including the battery pack is prolonged and the safety of use is improved.
In the application examples, 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 unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "connected" may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the examples of the application can be understood by those skilled in the art according to specific situations.
In the description of the embodiments of the present application, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the embodiments of the present application and simplifying the description, but do not indicate or imply that the referred devices or units must have a specific direction, be configured and operated in a specific orientation, and thus, should not be construed as limiting the embodiments of the present application.
In the description herein, reference to the term "one embodiment," "some embodiments," "a specific embodiment," or the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application embodiment. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the application example, and is not intended to limit the application example, and various modifications and changes may be made to the application example by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the applied embodiment shall be included in the protection scope of the applied embodiment.
Claims (13)
1. A connector, characterized in that the connector comprises a first connection portion and a second connection portion connected to the first connection portion;
the first connecting part is provided with a plurality of first welding holes formed on a first surface of the connecting part in the thickness direction, and the depth of each first welding hole is smaller than the thickness of the first connecting part;
the first welding hole comprises a conical hole section, the large hole end of the conical hole section is located on the first surface of the connecting piece in the thickness direction, and the hole wall of the first welding hole is used for reflecting laser for multiple times during welding.
2. The connector of claim 1, wherein the first weld bore further comprises a receiving cavity segment located on a side of the tapered bore segment remote from the first face and in communication with the tapered bore segment.
3. A connection piece according to claim 2, wherein said receiving cavity section is frustoconical or bulbous.
4. The fitting according to claim 1, wherein said tapered bore section is a conical bore or a pyramidal bore.
5. The connector according to claim 1, wherein the hole wall of the tapered hole section is convex or concave.
6. The connector according to claim 5, wherein the maximum included angle between the tangent line of the wall of the tapered bore section, which is located on the same plane as the centerline of the first welding bore, and the centerline of the first welding bore is less than or equal to 30 degrees.
7. A joiner according to any one of claims 1 to 6, wherein said second joiner has at least one recess formed in a first face in the thickness direction of said joiner, said recess having a depth less than the thickness of said second joiner.
8. The connector according to claim 7, wherein the second connection portion includes a first sub-connection portion and a second sub-connection portion;
the first sub-connecting portion and the second sub-connecting portion are located on two opposite sides of the first connecting portion in a direction perpendicular to a thickness direction of the connecting piece, and the first sub-connecting portion and/or the second sub-connecting portion are provided with the recess.
9. The connector according to any one of claims 1 to 6, wherein the depth of the first welding hole is less than or equal to 4/5 of the thickness of the first connection part.
10. The connector according to any one of claims 1 to 6, wherein the second connection part has a plurality of second welding holes formed in a first surface in a thickness direction of the connector, the second welding holes having a depth smaller than a thickness of the second connection part, and a shape of the second welding holes being the same as a shape of the first welding holes.
11. A battery, comprising:
a housing having an opening;
an electrode assembly housed within the case;
a cover plate assembly closing the opening;
an electrode terminal disposed through the cap assembly; and
the connector of any one of the preceding claims 1-10,
wherein a first face of the connecting member in a thickness direction faces the electrode assembly, a second face of the connecting member in the thickness direction faces the cap plate assembly, the first connecting portion is welded to the electrode terminal, and the second connecting portion is welded to the electrode assembly.
12. A battery pack, comprising at least one battery according to claim 11.
13. An electric device, characterized in that it comprises a battery pack according to claim 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211148218.2A CN115441129A (en) | 2022-09-20 | 2022-09-20 | Connecting piece, battery package and consumer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211148218.2A CN115441129A (en) | 2022-09-20 | 2022-09-20 | Connecting piece, battery package and consumer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115441129A true CN115441129A (en) | 2022-12-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211148218.2A Pending CN115441129A (en) | 2022-09-20 | 2022-09-20 | Connecting piece, battery package and consumer |
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| Country | Link |
|---|---|
| CN (1) | CN115441129A (en) |
Cited By (1)
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