CN218694871U

CN218694871U - Ultrasonic welding head, ultrasonic welding equipment, battery pack and electric equipment

Info

Publication number: CN218694871U
Application number: CN202222849068.XU
Authority: CN
Inventors: 张宁辉; 赖宏基
Original assignee: Xiamen Hithium Energy Storage Technology Co Ltd
Current assignee: Xiamen Hithium Energy Storage Technology Co Ltd
Priority date: 2022-10-27
Filing date: 2022-10-27
Publication date: 2023-03-24
Anticipated expiration: 2032-10-27

Abstract

The utility model discloses an ultrasonic bonding tool, ultrasonic bonding equipment, battery package and consumer. The ultrasonic horn comprises: a working end face; and at least one welding tooth, the welding tooth is arranged on the working end face, the surface of the welding tooth is a curved surface, and the curvature of each point on the surface of the welding tooth is continuously changed along the direction far away from the working end face. According to the ultrasonic welding head, the situation that the surface shape of the welding tooth is suddenly changed to cause stress concentration is avoided through the configuration, and the service life of the welding tooth is prolonged.

Description

Ultrasonic welding head, ultrasonic welding equipment, battery pack and electric equipment

Technical Field

The utility model relates to a battery technology field, in particular to ultrasonic bonding tool, ultrasonic welding equipment, battery package and consumer.

Background

The single battery generally adopts a connecting sheet to connect the pole and the pole ear, and realizes the electric connection between the winding core and the outside of the battery shell. The connecting sheet is connected with the lug by ultrasonic welding, one side of the lug is connected with the connecting sheet, and the other side of the lug is opposite to the ultrasonic welding head. The ultrasonic welding head is provided with welding teeth, the welding teeth act on the lug to form a welding point on the lug, and the lug is connected with the connecting sheet at the welding point. However, the existing ultrasonic welding head is easy to generate stress concentration, so that the welding tooth is easy to fatigue fracture, and the service life of the welding tooth is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model discloses embodiment provides an ultrasonic bonding tool, ultrasonic bonding equipment, battery package and consumer.

The utility model discloses embodiment's an ultrasonic bonding tool includes:

a working end face; and

the welding teeth are arranged on the working end face, the surfaces of the welding teeth are curved surfaces, and the curvatures of all points on the surfaces of the welding teeth continuously change along the direction far away from the working end face.

According to the ultrasonic welding head, the situation that the surface shape of the welding tooth is suddenly changed to cause stress concentration is avoided through the configuration, and the service life of the welding tooth is prolonged.

In some embodiments, the working end face is provided with a plurality of welding teeth, and the plurality of welding teeth are arranged in an array.

Therefore, the welding area formed when the tab is welded with the connecting component is larger, and the connecting strength of the tab and the connecting component is improved.

In some embodiments, the working end face is provided with a plurality of welding teeth, and the plurality of welding teeth are uniformly distributed on the working end face.

Therefore, the uniformity of the connection strength between the tab and the connecting part can be ensured.

In some embodiments, the tip of the tooth is arcuate.

Therefore, when stress concentration is avoided, the situation that the top end of the welding tooth pierces the tab or pierces the tab and the connecting component is avoided, and the welding effect is guaranteed.

In some embodiments, the ultrasonic horn further comprises:

a connecting portion; and

the two working parts are respectively connected to two sides of the connecting part, which are opposite to each other, and one end, away from the connecting part, of each working part is provided with the working end face.

So, be equipped with two work portions, one of them work portion can be as reserve, can promote utmost point ear and adapting unit's welding efficiency.

The utility model discloses embodiment's an ultrasonic welding equipment includes the ultrasonic bonding tool of any above-mentioned embodiment.

According to the ultrasonic welding equipment, through the ultrasonic welding head, the condition that the stress concentration is caused due to the fact that the surface shape of the welding tooth is suddenly changed is avoided, and the service life of the welding tooth is prolonged.

In certain embodiments, the ultrasonic horn is removably mounted to the ultrasonic welding apparatus.

Therefore, the ultrasonic welding head is convenient to maintain.

The utility model discloses embodiment's a battery includes:

a tab; and

and the connecting part is used for connecting the pole lug, and the joint of the pole lug and the connecting part is formed by welding by using the ultrasonic welding equipment of any one of the above embodiments.

The utility model discloses embodiment's a battery package includes above-mentioned embodiment's battery.

The utility model discloses embodiment's a consumer includes above-mentioned embodiment's battery package.

Among above-mentioned battery, battery package and consumer, by above-mentioned ultrasonic bonding equipment welding utmost point ear and adapting unit, thereby the solder joint that forms can avoid appearing the structure of shape sudden change in the solder joint and arouse stress concentration, guaranteed again that the solder joint surface has enough big area to be used for connecting utmost point ear and adapting unit, guarantees utmost point ear and adapting unit's joint strength, has prolonged battery, battery package and consumer's life.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic perspective view of an ultrasonic horn according to an embodiment of the present invention;

FIG. 2 is an enlarged view of portion A of FIG. 1;

fig. 3 is a schematic plan view of an ultrasonic horn according to an embodiment of the present invention;

FIG. 4 is an enlarged view of portion B of FIG. 3;

fig. 5 is a schematic view of a scene of an ultrasonic welding head welding battery according to an embodiment of the present invention;

fig. 6 is an enlarged view of a portion C in fig. 5.

Description of reference numerals:

the ultrasonic welding head-100, the working end face-12, the welding teeth-14, the lugs-16, the welding mark area-18, the welding spot-20, the connecting part-22, the working part-24, the battery core-26, the connecting sheet-28 and the battery-200.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected. Either mechanically or electrically. Either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the invention. In order to simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or reference letters in the various examples, which have been repeated for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or arrangements discussed. In addition, the present disclosure provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

In the related art, the ultrasonic welding head is generally in a pyramid shape or a frustum pyramid shape, and stress concentration occurs at abrupt shape changes (such as edges and sharp corners) of welding teeth in the pyramid shape or the frustum pyramid shape, so that the welding teeth are easy to fatigue fracture.

To solve the above problem, referring to fig. 1 to 4, an ultrasonic horn 100 according to an embodiment of the present invention includes a working end surface 12 and at least one welding tooth 14. The working end face 12 is configured to face the tab 16 when welded. The welding teeth 14 are provided on the working end face 12 and are configured to act on the tab 16. The surface of the tooth 14 is curved and the curvature of each point on the surface of the tooth 14 varies continuously in a direction away from the working end face 12.

The ultrasonic welding head 100 avoids the situation that the surface shape of the welding tooth 14 generates abrupt change to cause stress concentration through the configuration, and prolongs the service life of the welding tooth 14.

Further, compare with the tooth 14 that welds that the surface is the sphere (the camber of sphere is unchangeable), the utility model discloses an above-mentioned tooth 14 that welds that sets up has bigger surface area (weld under the same condition of tooth 14 volume), has promoted utmost point ear 16 and adapting unit's welding area, makes utmost point ear 16 and adapting unit's being connected more firm, has promoted battery 200's life. The connecting part can be a connecting sheet, an adapter, a pole or other parts.

In particular, the working end face 12 may be planar. In one embodiment, the surface of the tooth 14 may be a surface that is rotated about an axis by a sine function curve or a cosine function curve. It is understood that the surface of the tooth 14 may be other curved surfaces.

In one embodiment, the working end face 12 is provided with a welding tooth 14. In one embodiment, the working end face 12 is provided with a plurality of welding teeth 14. Plural may mean two or more than two.

The working end face 12 may face the tab 16 during welding. The welding teeth 14 may act on the tab 16.

In some embodiments, the working end surface 12 is provided with a plurality of welding teeth 14, and the plurality of welding teeth 14 are arranged in an array. Therefore, the welding mark area 18 formed when the tab 16 is welded with the connecting component is larger, and the connecting strength of the tab 16 and the connecting component is improved.

Specifically, referring to fig. 5 to 6, in the welding process, when the plurality of welding teeth 14 arranged in an array act on the tab 16, the welding teeth contact the surface of the tab 16, and a welding print area 18 is formed in the contact area of the surface of the tab 16, and the welding print area 18 is substantially the same as the welding tooth 14 area formed by the plurality of welding teeth 14 arranged in an array, so that the welding print area 18 where the tab 16 is connected with the connecting component is ensured to be larger, and the connection strength between the tab 16 and the connecting component is improved.

In some embodiments, the working end surface 12 is provided with a plurality of welding teeth 14, and the plurality of welding teeth 14 are evenly distributed on the working end surface 12. In this way, the uniformity of the connection strength of the tab 16 to the connection member can be ensured.

Specifically, in the welding process, when the plurality of welding teeth 14 act on the tab 16, the welding teeth are in surface contact with the tab 16, and a welding mark area 18 is formed in a contact area on the surface of the tab 16, and as the plurality of welding teeth 14 are uniformly distributed on the working end surface 12, welding points 20 formed by the plurality of welding teeth 14 are also uniformly distributed in the welding mark area 18, so that the uniformity of the connection strength between the tab 16 and the connecting component is ensured, and the phenomenon that part of the welding points 20 fall off due to the non-uniform connection strength is avoided.

In some embodiments, the tip of the tooth 14 is arcuate. Therefore, stress concentration is avoided, and meanwhile the top ends of the welding teeth 14 are prevented from piercing the pole lugs or piercing the pole lugs and the connecting parts, and the welding effect is guaranteed.

Specifically, the tip of the welding tooth 14, which has the curvature of each point on the surface of the welding tooth 14 continuously changing and is in the shape of an arc, can avoid stress concentration at the tip of the welding tooth 14, and prolong the service life of the welding head. When the welding spots 20 are formed, the bottoms of the welding spots 20 formed at the tips of the arc-shaped welding teeth 14 are correspondingly arc-shaped, so that the connection between the tabs and the connecting parts is prevented from being broken due to the stress concentration at the bottoms of the welding spots 20.

Compared with the top ends of the welding teeth 14 with edges and corners, the top ends of the arc-shaped welding teeth 14 cannot or are not easy to pierce the tabs or pierce the tabs and the connecting parts during welding, and the welding effect is ensured.

In certain embodiments, referring to fig. 1 and 3, ultrasonic horn 100 further includes a joining section 22 and two working sections 24. Two working parts 24 are respectively connected to two opposite sides of the connecting part 22, and one end of each working part 24, which is far away from the connecting part 22, is provided with a working end surface 12. In this way, two working portions 24 are provided, and one of the working portions 24 is used as a backup, which can improve the welding efficiency of the tab 16 and the connection member.

Specifically, two working portions 24 are provided on opposite sides of the connecting portion 22, and when the tab 16 and the connecting member are welded, one of the working portions 24 is placed on the outer side of the portion to be welded of the battery 200, and the tab 16 of each battery 200 is opposite to the working end surface 12 on the working portion 24, so that the welding teeth 14 are in contact with the tab 16. After the relative positions of ultrasonic horn 100 and battery 200 are fixed, the welding operation can be performed. When the working part 24 which is performing the welding operation is abnormal and the welding cannot be continued, the ultrasonic welding head 100 can be turned over, the working part 24 on the other side is used for continuing welding the tab 16, so that the ultrasonic welding head 100 does not need to be replaced, and the welding efficiency of the tab 16 and the connecting part is improved.

The ultrasonic welding apparatus according to an embodiment of the present invention includes the ultrasonic horn 100 according to any one of the above embodiments.

The ultrasonic welding equipment avoids the situation that the surface shape of the welding tooth 14 generates sudden change to cause stress concentration through the configured ultrasonic welding head 100, and prolongs the service life of the welding tooth 14.

Specifically, in one embodiment, ultrasonic horn 100 may be coupled to other components of an ultrasonic welding apparatus via coupling 22.

In certain embodiments, the ultrasonic horn 100 is removably mounted to an ultrasonic welding apparatus. In this manner, maintenance of the ultrasonic horn 100 is facilitated. Specifically, in one example, the ultrasonic horn 100 may be mounted on the ultrasonic welding apparatus by bolts. However, the ultrasonic horn 100 is not limited to being mounted on the ultrasonic welding apparatus by bolts, and may be mounted on the ultrasonic welding apparatus by other detachable means.

The utility model discloses a battery 200 of embodiment includes utmost point ear 16 and adapting unit, and adapting unit connects utmost point ear 16, and adapting unit and utmost point ear 16's connection is the ultrasonic welding equipment welding formation that utilizes above-mentioned embodiment.

In the battery 200, the tab 16 and the connecting part are welded by the ultrasonic welding equipment, the formed welding point 20 can avoid stress concentration caused by a shape mutation structure in the welding point 20, the surface of the welding point 20 is ensured to have a large enough area for connecting the tab 16 and the connecting part, the connection strength of the tab 16 and the connecting part is ensured, and the service life of the battery 200 is prolonged.

Specifically, the battery includes a cell 26, a housing (not shown), and an end cap assembly (not shown). The battery 200 may include a single or a plurality of cells 26.

The top of the battery cell 26 is connected with two tabs 16, one tab may be a positive tab, and the other tab may be a negative tab. For example, the positive tab may be located on the left side of the top of cell 26 and the negative tab may be located on the right side of the top of cell 26.

The cell 26 may be housed within a housing, the housing being open-topped. The end cover assembly covers the top opening of the housing. The end cap assembly comprises a connecting piece 28 and a pole, and the connecting piece 28 is connected with the pole lug 16 and the pole. The connecting pieces 28 and the tabs 16 are welded and connected by the ultrasonic welding equipment. In the illustrated embodiment, the connecting piece 28 may serve as a connecting member.

The embodiment of the present invention provides a battery pack including the battery 200 of the above embodiment.

In the battery pack, the tab 16 and the connecting part are welded by the ultrasonic welding equipment, the formed welding point 20 can avoid stress concentration caused by a shape mutation structure in the welding point 20, the surface of the welding point 20 is ensured to have a large enough area for connecting the tab 16 and the connecting part, the connection strength of the tab 16 and the connecting part is ensured, and the service life of the battery 200 is prolonged.

Specifically, the battery pack may include one or more batteries 200. The plurality of cells 200 are electrically connected in series, parallel, or series-parallel. Plural may mean two or more than two.

In the electric equipment, the tab 16 and the connecting part are welded by the ultrasonic welding equipment, the formed welding point 20 can avoid stress concentration caused by a shape mutation structure in the welding point 20, the surface of the welding point 20 is ensured to have a large enough area for connecting the tab 16 and the connecting part, the connecting strength of the tab 16 and the connecting part is ensured, and the service life of the electric equipment is prolonged.

Specifically, the powered device may include one or more battery packs, and the plurality of battery packs may be electrically connected in series, parallel, or series-parallel.

The powered devices include, but are not limited to, energy storage devices and vehicles. The energy storage equipment can be the energy storage container, and the energy storage container includes the box and sets up the battery cluster in the box, and the battery cluster includes cluster frame and a plurality of battery package, and a plurality of battery packages are installed on the cluster frame. The energy storage device may also be a domestic energy storage cabinet.

The battery pack can be applied to a vehicle as a power battery pack. Vehicles include, but are not limited to, electric vehicles, hybrid vehicles, extended range electric vehicles, and the like.

In the description of the present specification, reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "example", "specific example", or "some examples" 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 present invention. In this specification, schematic representations of the above terms 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.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An ultrasonic horn, comprising:

a working end face; and

2. The ultrasonic horn of claim 1 wherein the working end face has a plurality of the welding teeth arranged in an array.

3. An ultrasonic horn according to claim 1 wherein the working end face is provided with a plurality of the welding teeth, the plurality of welding teeth being evenly distributed over the working end face.

4. The ultrasonic horn of claim 1 wherein the tips of the teeth are arcuate.

5. The ultrasonic horn of claim 1, further comprising:

a connecting portion; and

6. An ultrasonic welding apparatus comprising an ultrasonic horn according to any one of claims 1 to 5.

7. The ultrasonic welding apparatus of claim 6, wherein the ultrasonic horn is removably mounted to the ultrasonic welding apparatus.

8. A battery, comprising:

a tab; and

a connecting member for connecting the tabs, wherein the joint of the tabs and the connecting member is formed by welding with the ultrasonic welding device of claim 6 or 7.

9. A battery pack comprising the battery of claim 8.

10. An electric device comprising the battery pack according to claim 9.