Welding printing structure, battery and electric equipment
By setting multiple spaced solder joints and empty solder areas in the soldering structure, the problem of insufficient welding tensile strength in small-sized battery designs is solved, thereby improving welding strength and stability.
Patent Information
- Application Number
- CN202423153819.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-19
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2034-12-19
AI Technical Summary
In existing technologies, the solder pattern cannot guarantee welding tensile strength when the size is reduced, which affects the welding strength and stability, especially in small-size battery designs.
The design employs a weld stamp structure, which includes multiple spaced weld points and an enclosed open weld area. The ratio and distance between the weld stamp and the open weld area are set to 0.7 < T/S < 1.7, and D2 > D1 to ensure welding tensile strength and structural strength.
It enhances welding tensile strength and stability, improves welding quality, and ensures the structural strength and adaptability of the battery.
Smart Images
Figure CN223693315U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to battery welding technical field especially relates to a welding mark structure, battery and electric equipment. BACKGROUND
[0002] Ultrasonic metal welding is a kind of solid-state welding through ultrasonic energy, is widely used in the welding of tab and current collector in lithium battery.In the ultrasonic welding process, workpiece can occur under the joint of intense friction under the joint of welding head normal force and high-frequency vibration, to realize the welding of same or different kinds of metal.In the related art, the welding mark structure is a part of overall arrangement, and the welding mark size needs to be adjusted according to specific application requirements, reducing the welding mark size can adapt to small size battery design, but also will greatly affect the joint strength of welding mark structure, leading to unable to guarantee the welding tension. SUMMARY
[0003] The utility model discloses a kind of welding mark structure, battery and electric equipment, to solve the technical problem that welding mark structure cannot guarantee welding tension.
[0004] To achieve the above object, the utility model first aspect embodiment proposes a kind of welding mark structure, for battery, the battery includes tab and current collector, the welding mark structure is used to connect the tab with the current collector, the welding mark structure includes:
[0005] Welding mark part, including multiple interval arrangement welding points, the welding mark part at least partially encloses empty welding area;The maximum distance of adjacent two welding points is D1, the minimum size of the empty welding area is D2, wherein D2>D1.
[0006] In some embodiments, the circumference of the welding mark part is T1, the circumference of the empty welding area is T2, as observed along the thickness direction of the welding mark part, the area of the welding mark part is S1, the area of the empty welding area is S2;Wherein, T=T1+T2, S=S1-S2, the welding mark part and the empty welding area satisfy: 0.7
[0007] In some embodiments, the empty welding area is located inside the welding mark part, the welding mark part is arranged around the empty welding area, as observed along the thickness direction of the welding mark part, the empty welding area is spaced from any side edge of the welding mark part located at the outer periphery.
[0008] In some embodiments, the empty welding area includes a first side edge, the welding mark part includes a second side edge located at the outer periphery, the first side edge and the second side edge at least partially coincide.
[0009] In some embodiments, the welding mark part encloses a plurality of the empty welding areas, and two adjacent empty welding areas are arranged at intervals; and, viewed in the thickness direction of the welding mark part, one of the empty welding areas is spaced apart from any side edge of the welding mark part located at the outer periphery; and the other empty welding area comprises a first side edge, and the welding mark part comprises a second side edge located at the outer periphery, and the first side edge at least partially overlaps the second side edge.
[0010] In some embodiments, a portion of the plurality of welding points are arranged at intervals in a first direction, and a portion of the plurality of welding points are arranged at intervals in a second direction, the second direction being perpendicular to the first direction and the thickness direction of the welding mark part.
[0011] In the first direction, the distance between two adjacent welding points is L1, and in the second direction, the distance between two adjacent welding points is L2; wherein L1 satisfies 0.2mm≤L1≤0.8mm, and L2 satisfies 0.2mm≤L2≤0.8mm.
[0012] In some embodiments, the welding mark part has a rectangular shape, and the welding mark part comprises a third side edge and a fourth side edge connected to each other, the third side edge and the fourth side edge are both located at the outer periphery of the welding mark part, the length of the third side edge is N1, wherein N1 satisfies N1≥2mm, and the length of the fourth side edge is N2, N2 satisfies N2≥3mm.
[0013] In some embodiments, the empty welding area has a rectangular shape; or, the empty welding area has a "C" shape; or, the empty welding area has a "cross" shape.
[0014] The second aspect of the utility model discloses a battery comprising the welding mark structure of the above embodiment.
[0015] The third aspect of the utility model discloses a power device comprising the battery of the above embodiment, and the battery is used for supplying power to the power device.
[0016] Compared with the prior art, the utility model has the beneficial effects including:
[0017] In the technical scheme of the utility model, the welding mark structure includes a welding mark part. The welding mark part includes a plurality of welding points arranged at intervals. In the prior art, the welding mark structure is arranged as a whole, and the welding mark size needs to be adjusted according to specific application requirements. Reducing the welding mark size can adapt to small-size battery design, but will greatly affect the joint strength of the welding mark structure, resulting in the inability to guarantee the welding tension. The welding mark part of the present scheme at least partially encloses a blank welding area, that is, the welding mark part of the present scheme can be separated into a plurality of welding areas connected to each other by the blank welding area. Compared with the scheme in which the existing welding mark structure is arranged as a whole welding area, the present scheme can effectively increase the welding tension of the welding mark structure, improve the stability of welding, and guarantee the structural strength of the battery as a whole. Further, the maximum distance between two adjacent welding points in the welding mark part is D1, and the minimum size of the blank welding area is D2, wherein D2>D1, that is, the welding tension of the welding mark structure can be guaranteed. BRIEF DESCRIPTION OF DRAWINGS
[0018] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to the structures shown in these drawings without creative labor for those skilled in the art.
[0019] Figure 1 It is a schematic view of the welding mark structure in an embodiment of the utility model. The welding mark part, the blank welding area, the first side, the second side, the third side, the fourth side and the tab are shown.
[0020] Figure 2 It is a schematic view of the welding mark structure in an embodiment of the utility model. Figure 1 It is a local enlarged schematic view of A in the middle. A plurality of welding points arranged at intervals are shown.
[0021] Figure 3 It is a schematic view of the welding mark structure in an embodiment of the utility model. The blank welding area is spaced from any side of the welding mark part located at the outer periphery.
[0022] Figure 4 It is a schematic view of the welding mark structure in an embodiment of the utility model. The first side of the blank welding area at least partially coincides with the second side of the welding mark part.
[0023] BRIEF DESCRIPTION OF DRAWINGS
[0024] The welding mark structure 10;
[0025] The welding mark part 100; the welding point 110; the second side 120; the third side 130; the fourth side 140;
[0026] Empty welding area 200; first side edge 210;
[0027] Tab 20;
[0028] First direction X; second direction Y; thickness direction Z.
[0029] The realization, functional features and advantages of the utility model will be further described with reference to the drawings in combination with embodiments. DETAILED DESCRIPTION
[0030] The technical solutions in the embodiments of the utility model will be apparently and completely described in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.
[0031] Ultrasonic metal welding is a solid-state welding achieved through ultrasonic energy, which is widely applied to the welding of tabs and current collectors in lithium batteries. In the ultrasonic welding process, workpieces can be subjected to intense friction to form joints under the joint action of normal force of a welding head and high-frequency vibration, so as to realize the welding of same or different kinds of metals. In the related art, the welding mark structure is a part arranged as a whole, and the welding mark size needs to be adjusted according to specific application requirements. Reducing the welding mark size can adapt to the design of small-size batteries, but will greatly affect the joint strength of the welding mark structure, resulting in the inability to guarantee the welding tension.
[0032] In view of this, the utility model discloses a first aspect embodiment to propose a kind of welding mark structure 10, the welding mark structure 10 has good welding tension.It can be understood that welding mark structure 10 is used in battery. Battery includes tab 20 and current collector. Welding mark structure 10 is used to connect tab 20 and current collector. Tab 20 is metal terminal in battery, can conduct the current generated in electrode to external load or charging equipment. Current collector can collect and distribute current to tab 20. It needs to be explained that current collector can be aluminum foil or copper foil. Below Figures 1 to 4 Welding mark structure 10 of the embodiment of the application will be introduced. Specifically, welding mark structure 10 includes welding mark part 100.
[0033] With reference to Figure 1 And Figure 2 Welding mark part 100 includes a plurality of interval arranged welding points 110. It needs to be explained that the interval between adjacent two welding points 110 can be uniform interval in some embodiments. In other embodiments, the interval between adjacent two welding points 110 can also be non-uniform interval. The interval between adjacent two welding points 110 is taken as an example to be described in the embodiment of the application. It can be understood that welding mark part 100 is the structure formed after ultrasonic welding.
[0034] Referring to Figure 1 The welding mark part 100 at least partially encloses the non-welding area 200, and the specific enclosing angle of the welding mark part 100 can be determined according to actual conditions. It should be noted that the non-welding area 200 is an area that is not subjected to ultrasonic welding. Since the welding mark part 100 can enclose the non-welding area 200, the non-welding area 200 can block the welding mark part 100 into multiple parts connected to each other.
[0035] The specific relative arrangement of the non-welding area 200 and the welding mark part 100 will be described below. The maximum distance between two adjacent welding points 110 in the welding mark part 100 is D1. It should be noted that the maximum distance between two adjacent welding points 110 can be the maximum center distance between two adjacent welding points 110. The minimum size of the non-welding area 200 is D2. Among them, the welding mark part 100 and the non-welding area 200 satisfy D2>D1.
[0036] In the technical scheme of the present application, the welding mark structure 10 comprises a welding mark part 100. The welding mark part 100 comprises a plurality of welding points 110 arranged at intervals. In the prior art, the welding mark structure is arranged as a whole, and the welding mark size needs to be adjusted according to the specific application requirements. Reducing the welding mark size can adapt to the design of small size battery, but it will also greatly affect the joint strength of the welding mark structure, resulting in the inability to guarantee the welding tension. The welding mark part 100 of the present application at least partially encloses the non-welding area 200, i.e. the welding mark part 100 of the present application can be separated by the non-welding area 200 into multiple welding areas connected to each other. When the size of the welding mark structure 10 is constant, compared with the prior art welding mark structure arranged as a whole, the present application can effectively increase the welding tension of the welding mark structure 10, improve the stability of welding, and guarantee the structural strength of the battery as a whole. Further, the maximum distance between two adjacent welding points 110 in the welding mark part 100 is D1, and the minimum size of the non-welding area 200 is D2, wherein D2>D1, i.e. the present application can guarantee the welding tension of the welding mark structure 10.
[0037] The relative arrangement of the welding mark part 100 and the non-welding area 200 will be described below. In some embodiments, the circumference of the welding mark part 100 is T1. It can be understood that the outer contour of the welding mark part 100 can be a regular figure or a irregular figure, which can be determined according to actual conditions. The outer contour of the non-welding area 200 can be the same as or different from that of the welding mark part 100. The circumference of the non-welding area 200 is T2. And, as viewed along the thickness direction Z of the welding mark part 100, referring to Figure 1The orientation is observed along the front-rear direction. The area of the welding portion 100 is S1, and the area of the empty welding area 200 is S2. Wherein, T = T1 + T2, S = S1 - S2. It should be noted that the welding portion 100 and the empty welding area 200 satisfy: 0.7 < T / S < 1.7. Exemplarily, T / S can be 0.72, 0.8, 0.95, 1.2, 1.34, 1.4, 1.59 or 1.68, etc. The welding structure 10 of the present solution adopts the above setting, that is, the proportion of the welding portion 100 and the empty welding area 200 is ensured to be within a reasonable range, which can provide sufficient welding area and will not excessively affect the strength and stability of the welding structure 10.
[0038] Referring to Figure 3 , the relative arrangement positions of the welding portion 100 and the empty welding area 200 are introduced below. In some embodiments, the empty welding area 200 can be located inside the welding portion 100, and the welding portion 100 can be arranged around the empty welding area 200. And, observed along the thickness direction Z of the welding portion 100, the empty welding area 200 is spaced apart from any side edge of the welding portion 100 located at the outer periphery. In other words, the empty welding area 200 can be in an embedded type.
[0039] Referring to Figure 4 , the relative arrangement positions of the welding portion 100 and the empty welding area 200 are introduced below. In some embodiments, the empty welding area 200 includes a first side edge 210. Referring to Figure 4 The orientation, the first side edge 210 can be a side edge (shown by a dashed line) of the empty welding area 200 located at the right side. The welding portion 100 includes a second side edge 120 located at the outer periphery, which can be a side edge of the welding portion 100 at the right side. Wherein, the first side edge 210 and the second side edge 120 at least partially coincide. In other words, the empty welding area 200 can be in a notched type.
[0040] Referring to Figure 1 , the relative arrangement positions of the welding portion 100 and the empty welding area 200 are introduced below. In some embodiments, the welding portion 100 encloses a plurality of empty welding areas 200, and the specific number of empty welding areas 200 can be determined according to actual conditions. The embodiments of the present application are described by taking two empty welding areas 200 as an example. Adjacent two empty welding areas 200 can be spaced apart. Observed along the thickness direction Z of the welding portion 100, one of the empty welding areas 200 is spaced apart from any side edge of the welding portion 100 located at the outer periphery, referring to Figure 1 The orientation, that is, the first empty welding area 200 located at the upper side is spaced apart from any side edge of the welding portion 100 located at the outer periphery, that is, the first empty welding area 200 can be in an embedded type. The other empty welding area 200 includes a first side edge 210, referring to Figure 1The orientation, i.e. the second empty soldering area 200 located at the lower side, comprises a first side edge 210. The soldering pad 100 comprises a second side edge 120 located at the outer periphery. The first side edge 210 can at least partially coincide with the second side edge 120, i.e. the second empty soldering area 200 can be in the form of a notch.
[0041] With reference to Figure 2 , the specific arrangement of the plurality of soldering points 110 will be described below. In some embodiments, a portion of the plurality of soldering points 110 can be arranged at intervals along a first direction X. A portion of the plurality of soldering points 110 can be arranged at intervals along a second direction Y. It should be noted that the second direction Y is perpendicular to the first direction X and the thickness direction Z of the soldering pad 100. With reference to Figure 2 The orientation, the first direction X can point to the left-right direction, the second direction Y can point to the up-down direction, and the thickness direction Z of the soldering pad 100 can point to the front-back direction. It can be understood that along the first direction X, the interval between two adjacent soldering points 110 can be uniform. Along the second direction Y, the interval between two adjacent soldering points 110 can be uniform.
[0042] With reference to Figure 2 , along the first direction X, the distance between two adjacent soldering points 110 is L1. It should be noted that the distance between two adjacent soldering points 110 can be the center distance of the two soldering points 110. Along the second direction Y, the distance between two adjacent soldering points 110 is L2. Wherein, L1 satisfies: 0.2mm≤L1≤0.8mm. Exemplarily, L1 can be 0.2mm, 0.34mm, 0.5mm, 0.68mm, 0.75mm or 0.8mm. L2 satisfies: 0.2mm≤L2≤0.8mm. Exemplarily, L2 can be 0.2mm, 0.24mm, 0.35mm, 0.4mm, 0.55mm, 0.63mm, 0.72mm or 0.8mm. It should be noted that L1 can be the same as L2, or can be different, which can be determined according to actual conditions. The soldering points 110 of the present scheme adopt the above-mentioned arrangement, which can improve the uniformity and stability of the soldering structure 10, and can avoid excessive density or sparseness between the soldering points 110, thereby ensuring the welding quality.
[0043] With reference to Figure 1 , the specific size of the soldering pad 100 will be described below. In some embodiments, the outer contour of the soldering pad 100 can be in the form of a rectangle. The soldering pad 100 comprises a third side edge 130 and a fourth side edge 140, which are arranged in connection with each other. And the third side edge 130 and the fourth side edge 140 are both located at the outer periphery of the soldering pad 100. With reference to Figure 1The third side 130 can be a side of the lower side of the soldering part 100, and the fourth side 140 can be a side of the left side of the soldering part 100. The length of the third side 130 is N1, and N1 satisfies N1≥2 mm. For example, N1 can be 2 mm, 2.5 mm, 3 mm, or 4 mm, etc. The length of the fourth side 140 is N2, and N2 satisfies N2≥3 mm. N2 can be 3 mm, 3.5 mm, 4 mm, 4.4 mm, or 5 mm, etc. The above-mentioned arrangement can improve the uniformity and stability of the soldering structure 10.
[0044] With reference to Figures 1 to 4 The specific shape of the empty soldering area 200 will be described below. In some embodiments, the shape of the empty soldering area 200 can be a rectangle. In other embodiments, the shape of the empty soldering area 200 can be a "C" shape or an "S" shape. In other embodiments, the shape of the empty soldering area 200 can be a "cross" shape. The specific shape of the empty soldering area 200 can be determined according to actual conditions. The above-mentioned arrangement of the empty soldering area 200 can improve the adaptability and flexibility of the soldering structure 10 to adapt to different types of battery structures and ensure the welding quality.
[0045] It should be noted that in some embodiments, ultrasonic welding can be used to process the soldering structure 10 by using a welding head and a welding seat. The welding head can be provided with a plurality of welding teeth, and the specific structure of the welding head and the welding teeth can be determined according to actual needs.
[0046] The second aspect of the utility model discloses a battery, and the battery comprises the soldering structure 10 of the above-mentioned embodiments. The battery is taken as a lithium battery as an example for description. The above-mentioned arrangement can effectively increase the welding tension of the soldering structure 10, improve the stability of welding, and ensure the structural strength of the battery as a whole.
[0047] The third aspect of the utility model discloses a power utilization equipment, and the power utilization equipment comprises the battery of the above-mentioned embodiments. The battery is used for power supply of the power utilization equipment. It can be understood that the power utilization equipment can be a mobile phone, a tablet computer, a notebook computer, a battery toy, a power tool or an electric vehicle, and the specific application can be determined according to actual conditions. The battery of the above-mentioned arrangement can ensure the stability and reliability of the operation of the power utilization equipment.
[0048] It should be noted that if the embodiments of the utility model have directionality indication (such as up, down, left, right, front, back, etc.), the directionality indication is only used to explain the relative position relationship, movement condition, etc. between components in a certain specific posture, if the specific posture changes, the directionality indication also changes accordingly. When the direction reference is introduced in the specific embodiment, if the direction is not specially limited as one-way, the direction can be one-way or bidirectional (two parallel and opposite directions), and whether it is one-way or bidirectional is based on the realization of ordinary skilled personnel in the art. When the direction reference is bidirectional, it is considered that two different embodiments in parallel are introduced.
[0049] In addition, if the embodiments of the utility model have descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In addition, if "and / or", "and / or", or "and / or" appears throughout the text, it means that the three parallel schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B simultaneously satisfy the scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled personnel in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the scope of protection required by the utility model.
[0050] The above is only the preferred embodiment of the utility model, and does not limit the patent range of the utility model, any equivalent structural transformation made by the utility model specification and the drawings, or direct / indirect application in other related technical fields based on the utility model concept of the utility model is included in the patent protection range of the utility model.
Claims
1. A weld structure for a battery, the battery comprising a tab and a current collector, the weld structure for connecting the tab and the current collector, characterized by, The soldering structure comprises: a soldering part comprising a plurality of soldering points arranged at intervals, the soldering part at least partially enclosing a non-soldering area; the maximum distance between two adjacent soldering points is D1, and the minimum size of the non-soldering area is D2, wherein D2>D1.
2. The soldering structure of claim 1, wherein the circumference of the soldering part is T1, the circumference of the non-soldering area is T2, the area of the soldering part is S1, and the area of the non-soldering area is S2, as viewed along the thickness direction of the soldering part; wherein T=T1+T2, S=S1-S2, and the soldering part and the non-soldering area satisfy 0.7 3. The soldering structure of claim 1, wherein the non-soldering area is located inside the soldering part, and the soldering part is arranged around the non-soldering area; as viewed along the thickness direction of the soldering part, the non-soldering area is spaced apart from any side of the soldering part located at the outer periphery.
4. The soldering structure of claim 1, wherein the non-soldering area comprises a first side, and the soldering part comprises a second side located at the outer periphery, and the first side at least partially overlaps the second side.
5. The soldering structure of claim 1, wherein the soldering part encloses a plurality of non-soldering areas, and two adjacent non-soldering areas are arranged at intervals; and as viewed along the thickness direction of the soldering part, one of the non-soldering areas is spaced apart from any side of the soldering part located at the outer periphery, and another of the non-soldering areas comprises a first side, and the soldering part comprises a second side located at the outer periphery, and the first side at least partially overlaps the second side.
6. The soldering structure of claim 1, wherein a portion of the plurality of soldering points are arranged at intervals along a first direction, and a portion of the plurality of soldering points are arranged at intervals along a second direction, and the second direction is perpendicular to the first direction and the thickness direction of the soldering part; along the first direction, the distance between two adjacent soldering points is L1, and along the second direction, the distance between two adjacent soldering points is L2; wherein L1 satisfies 0.2mm≤L1≤0.8mm, and L2 satisfies 0.2mm≤L2≤0.8mm.
7. The soldering structure of claim 1, wherein the soldering part has a rectangular shape, and the soldering part comprises a third side and a fourth side connected to each other, and the third side and the fourth side are both located at the outer periphery of the soldering part, and the length of the third side is N1, wherein N1 satisfies N1≥2mm, and the length of the fourth side is N2, and N2 satisfies N2≥3mm.
8. The soldering structure of claim 1, wherein the non-soldering area has a rectangular shape; or, the non-soldering area has a "C" shape; or, the non-soldering area has a "cross" shape.
9. A battery characterized by The soldering structure of any one of claims 1-8.
10. An electrical device, characterized by The battery of claim 9, wherein the battery is used to supply power to the power-consuming device.