Detailed Description
Exemplary embodiments that embody features and advantages of the invention are described in detail below. It is to be understood that the invention is capable of other and different embodiments and its several details are capable of modification without departing from the scope of the invention, and that the description and drawings are to be regarded as illustrative in nature and not as restrictive.
In the following description of various exemplary embodiments of the invention, reference is made to the accompanying drawings, which form a part hereof, and in which are shown by way of illustration various exemplary structures, systems, and steps in which aspects of the invention may be practiced. It is to be understood that other specific arrangements of parts, structures, example devices, systems, and steps may be utilized and structural and functional modifications may be made without departing from the scope of the present invention. Moreover, although the terms "over," "between," "within," and the like may be used in this specification to describe various example features and elements of the invention, these terms are used herein for convenience only, e.g., in accordance with the orientation of the examples in the figures. A plurality of for at least two. Nothing in this specification should be construed as requiring a specific three dimensional orientation of structures to fall within the scope of the invention.
An embodiment of the present invention provides a battery, please refer to fig. 1 to fig. 6, the battery includes: a main body portion 10; the tab 20 is disposed on the main body 10, the tab 20 includes a first welding mark 21 and a second welding mark 22, and the second welding mark 22 covers at least a portion of the first welding mark 21.
The utility model discloses a battery is through being formed with first seal 21 and the second of welding on utmost point ear 20 and welds seal 22, and the second welds seal 22 and covers the first at least part that welds seal 21, when utmost point ear 20 welds with the apron subassembly promptly, has carried out twice welding to utmost point ear 20 to can control the welding energy better, prevent to cause the damage to utmost point ear 20.
Note that the second pad 22 covers at least a part of the first pad 21, that is, when the first pad 21 is formed by the first welding and then the second welding is performed, the second pad 22 can be formed on the first pad 21 by performing the second welding in the region of the first pad 21. Of course, embodiments are not excluded in which part of the second solder stamp 22 is located outside the first solder stamp 21.
In one embodiment, the first welding mark 21 may be formed by directly pre-welding the tab 20, that is, the tab 20 is pre-welded before the tab 20 and the cover plate assembly are welded, so that the metal sheets of the tab 20 are bonded together, and the structural strength of the tab 20 is improved to some extent, so that when the tab 20 and the cover plate assembly are welded, even though the welding energy is relatively large, the first welding mark 21 exists, and the second welding mark 22 is performed on the basis of the first welding mark 21, the first welding mark 21 enhances the strength of the tab 20, so that the probability of damage to the tab 20 is greatly reduced during the second welding.
In one embodiment, the first weld mark 21 may be a first weld mark formed by pre-welding the tab 20 and the cover plate assembly, i.e., a second weld mark 22 formed on the first weld mark 21, wherein the first weld mark is relatively low in welding energy, so that the respective metal sheets of the tab 20 are combined together, and the tab 20 and the cover plate assembly are connected with each other. Due to the existence of the first welding mark 21 and the second welding mark 22 performed on the basis of the first welding mark 21, even though the welding energy is relatively large, the first welding mark 21 enhances the strength of the tab 20, so that the probability of damage to the tab 20 during the second welding is greatly reduced.
In one embodiment, the first and second welding impressions 21 and 22 are formed in sequence, that is, in the process of forming the second welding impression 22, since the welding is performed in the first welding impression 21, even though the welding energy is relatively large, since the first welding impression 21 enhances the strength of the tab 20, damage to the tab 20 is prevented.
In one embodiment, the second weld impressions 22 are all located within the first weld impressions 21, i.e., damage to the tab 20 is minimally avoided. It should be noted that the second welding marks 22 are all located in the first welding marks 21, that is, after the first welding marks 21 are formed, a second welding is required to be performed, and a welding area required to ensure alignment of the second welding is located in the first welding marks 21, which is mainly represented herein as a welding area of the tab 20, regardless of a welding area of the cover plate assembly, that is, taking the tab 20 as a welding reference, and actually, the second welding marks 22 are formed when the tab 20 and the cover plate assembly are welded.
In one embodiment, the second welding mark 22 is located in the middle of the first welding mark 21, so as to ensure that the tab 20 is not damaged during the second welding.
It should be noted that the central portion is not particularly specified as the central position, but is relative to the circumferential outer edge of the first solder mark 21, that is, the second solder mark 22 does not intersect with the circumferential outer edge of the first solder mark 21, and then the second solder mark 22 is located in the central portion of the first solder mark 21.
In one embodiment, the second solder mark 22 is located at a central position of the first solder mark 21.
In one embodiment, the first solder mark 21 may be multi-deformable, such as rectangular, and correspondingly the second solder mark 22 may be multi-deformable, such as rectangular.
In one embodiment, the first solder mark 21 may be circular, oval, or irregular in shape, and correspondingly, the second solder mark 22 may be circular, oval, or irregular in shape. The specific shapes of the first solder mark 21 and the second solder mark 22 are not limited, and can be selected according to actual requirements.
In one embodiment, the first welding mark 21 occupies at least a portion of the tab 20, and the first welding mark 21 is formed by pre-welding the tab 20, i.e., the tab 20 is pre-treated by welding before the tab 20 is connected to the cover plate assembly, so that the plurality of metal sheets forming the tab 20 are reliably connected.
Specifically, the tab 20 includes a metal sheet, and in the related art, when the tab 20 and the cover plate assembly are welded, a plurality of metal sheets are pressed together, but since a fixed connection is not formed between adjacent metal sheets, when the tab 20 and the cover plate assembly are welded, the metal sheets are damaged due to large energy. In the embodiment, the metal sheets are pre-welded, so that the adjacent metal sheets are stably connected, and the strength of the tab 20 is enhanced.
In one embodiment, the first and second solder impressions 21, 22 are both laser solder impressions; or, the first welding impression 21 and the second welding impression 22 are both ultrasonic welding impressions; or, the first welding stamp 21 is an ultrasonic welding stamp, and the second welding stamp 22 is a laser welding stamp; alternatively, the first solder mark 21 is a laser solder mark and the second solder mark 22 is an ultrasonic solder mark.
Specifically, the first welding forms the first welding mark 21, the second welding forms the second welding mark 22, and the first welding mode may be any one of ultrasonic welding and laser welding. Correspondingly, the second welding mode can adopt any one of ultrasonic welding and laser welding, so long as the stability of connection can be ensured, and the tab 20 cannot be damaged when the first welding is carried out.
In one embodiment, the number of the first welding impressions 21 is at least two, and the adjacent first welding impressions 21 are spaced apart, that is, at least two first welding impressions 21 are formed by separate welding when performing the pre-welding. The number of the second welding imprints 22 may be one or at least two, that is, the second welding imprints 22 may correspond to the first welding imprints 21 one by one, or may be less than the first welding imprints 21, that is, a part of the first welding imprints 21 does not cover the second welding imprints 22.
In one embodiment, the battery further comprises: the insulating layer, the at least part setting of insulating layer is on utmost point ear 20, the one end of insulating layer docks with the one end that first welding seal 21 is close to main part 10 mutually, the insulating layer extends along the direction of keeping away from first welding seal 21 to make the other end and the first interval setting of welding seal 21 of insulating layer, thereby make the insulating layer can not cover first welding seal 21, with this assurance when carrying out the welding of second time, can not make the insulating layer directly form welded partly, thereby avoided the insulating layer to influence welded connection's the condition appearance.
In one embodiment, as shown in fig. 3 and 6, the insulation layers include a first insulation layer 50 and a second insulation layer 60, and the first insulation layer 50 and the second insulation layer 60 are respectively located at both sides of the tab 20 for preventing electrical connection between the tab 20 and other components.
Specifically, the first insulating layer 50 is located outside the tab 20, one end of the first insulating layer 50 is in contact with the first welding mark 21, and the other end of the first insulating layer 50 is located on the main body 10, that is, the first insulating layer 50 covers the main body 10. Of course, embodiments are not excluded in which the first insulating layer 50 does not cover the main body portion 10.
Specifically, one end of the second insulating layer 60 is abutted to the first solder mark 21, and the other end of the second insulating layer 60 is located on the main body portion 10, that is, the second insulating layer 60 covers a portion of the main body portion 10. Of course, embodiments are not excluded in which the second insulating layer 60 does not cover the main body portion 10.
In one embodiment, the insulating layer may be an insulating tape.
In one embodiment, as shown in fig. 3, the battery further includes a cap plate assembly including: and the pole 30, the pole 30 and the tab 20 are welded to form the second welding print 22. The pole 30 of the battery is arranged opposite to the tab 20, that is, the tab 20 is in an ejection mode, and at the moment, the connection between the pole 30 and the tab 20 is directly realized through a welding mode.
It should be noted that, the pole 30 and the tab 20 are directly welded, so that an adapter sheet in the related technology is omitted, the material cost is reduced, and the process is simplified.
In one embodiment, as shown in fig. 3, the body portions 10 are arranged in pairs, and tabs 20 are connected to both of the body portions 10 in the pair; the pole 30 connects two adjacent tabs 20, so that the two tabs 20 of the two main bodies 10 are led out through one pole 30.
In one embodiment, the battery comprises a main body 10, two tabs 20 connected to two ends of the main body 10, and two poles 30 respectively connected to the two tabs 20, wherein the two tabs 20 are respectively connected to the two poles 30.
In one embodiment, the battery is composed of two main bodies 10, two pairs of tabs 20 connected to both ends of the main bodies 10, and two poles 30 respectively connected to the two pairs of tabs 20, and the two poles 30 are respectively connected to the two pairs of tabs 20.
In one embodiment, the two tabs 20 of the main body portion 10 are respectively formed with two first weld marks 21 by ultrasonic welding, as shown in fig. 1. A first insulating layer 50 is provided on the tab 20, wherein one end of the first insulating layer 50 is in abutment with the first weld 21 and the other end of the first insulating layer 50 is located on the main body 10, as shown in fig. 2. After the two body portions 10 are butted, the electrode post 30 and the tab 20 are joined by laser welding, and a second weld mark 22 is formed in the middle of the first weld mark 21, as shown in fig. 3.
In one embodiment, as shown in fig. 6, the battery further includes a cap plate assembly including: and the connecting part 40, wherein the connecting part 40 is welded with the tab 20 to form a second welding mark 22. The pole of the battery needs to be connected with the pole ear 20 through the connecting part 40, that is, the pole ear 20 is in a side-out mode, and at this time, the connecting part 40 is directly connected with the pole ear 20 through a welding mode.
In one embodiment, as shown in fig. 6, the body portions 10 are arranged in pairs, and tabs 20 are connected to both of the body portions 10 in the pair; wherein the connecting portion 40 connects two adjacent tabs 20, so that the two tabs 20 of the two main body portions 10 are connected to the pole through one connecting portion 40.
In one embodiment, the battery comprises a main body 10, two tabs 20 connected to two ends of the main body 10, and two connecting portions 40 respectively connecting the two tabs 20, wherein the two tabs 20 are respectively connected to two poles 30.
In one embodiment, the battery is composed of two main body parts 10, two pairs of tabs 20 connected to both ends of the main body parts 10, and two connection parts 40 respectively connecting the two pairs of tabs 20, the two connection parts 40 respectively connecting the two pairs of tabs 20.
In one embodiment, the two tabs 20 of the main body portion 10 are respectively formed with at least two first weld marks 21 by ultrasonic welding, as shown in fig. 4. A first insulating layer 50 is provided on the tab 20, wherein one end of the first insulating layer 50 is in abutment with the first weld 21 and the other end of the first insulating layer 50 is located on the main body 10, as shown in fig. 2. After the two body portions 10 are butted, the connection portion 40 is connected to the tab 20 by laser welding, and a second weld mark 22 is formed at the middle of the first weld mark 21, as shown in fig. 3. In this embodiment, at least two first welding imprints 21 are provided on each tab 20, and the first welding imprints 21 are not all welded for the second time, so that the first welding imprints 21 that do not need to be welded for the second time can be covered by the first insulating layer 50.
An embodiment of the present invention further provides a battery manufacturing method, including: pre-welding the tab 20 on the main body 10 to form a first weld mark 21 on the tab 20; welding the pole 30 of the cover plate assembly with the pole lug 20 to form a second welding print 22 on the pole lug 20, and enabling the second welding print 22 to cover at least part of the first welding print 21; or, the connection portion 40 of the cap plate assembly is welded with the tab 20 to form the second weld mark 22 on the tab 20 such that the second weld mark 22 covers at least a portion of the first weld mark 21.
The utility model discloses a battery manufacturing method of embodiment is through welding in advance formation first welding seal 21 to utmost point ear 20 to weld apron subassembly and utmost point ear 20 on first welding seal 21, formed second welding seal 22, carried out welding twice to utmost point ear 20 promptly, thereby can control the welding energy better, prevent to cause the damage to utmost point ear 20.
In one embodiment, after the first welding trace 21 is formed, a first insulating layer 50 is formed on the tab 20, one end of the first insulating layer 50 is abutted against the first welding trace 21, and the other end of the first insulating layer 50 is positioned on the main body portion 10.
In one embodiment, the first weld forms a first weld impression 21 and the second weld forms a second weld impression 22, and the first weld can be any one of ultrasonic welding and laser welding. Correspondingly, the second welding mode can adopt any one of ultrasonic welding and laser welding, so long as the stability of connection can be ensured, and the tab 20 cannot be damaged when the first welding is carried out.
In one embodiment, a battery manufacturing method is used to form the battery described above.
In one embodiment, as shown in fig. 1 to 3, the first weld impression 21 is formed on the tab 20 of the body portion 10 by ultrasonic welding. A first insulating layer 50 is provided on the tab 20, one end of the first insulating layer 50 is in contact with the first weld 21, and the other end of the first insulating layer 50 is positioned on the main body 10. After the two main bodies 10 are butted, the electrode post 30 and the tab 20 are joined by laser welding, and a second weld mark 22 is formed in the middle of the first weld mark 21. And (5) performing shell packaging after welding is completed.
In one embodiment, as shown in fig. 4 to 6, the first weld impression 21 is formed on the tab 20 of the body portion 10 by ultrasonic welding. A first insulating layer 50 is provided on the tab 20, one end of the first insulating layer 50 is in contact with the first weld 21, and the other end of the first insulating layer 50 is positioned on the main body 10. After the two body portions 10 are butted, the connection portion 40 and the tab 20 are connected by laser welding, and a second weld mark 22 is formed at the middle of the first weld mark 21. And (5) performing shell packaging after welding is completed.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. The present invention is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and exemplary embodiments be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.