Adapter and battery
By designing adapters with bosses, pressing the electrode ears and pre-tightening before welding, the problem of low welding efficiency between the adapter blades and the electrode ears is solved, and a more efficient welding process and better welding quality is achieved.
Patent Information
- Application Number
- CN202420320363.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-20
- Publication Date
- 2025-03-04
- Estimated Expiration
- 2034-02-20
AI Technical Summary
In the prior art, the welding efficiency between the adapter and the pole ear is low, and pre-welding is required before laser welding, which is complicated and inefficient.
An adapter is designed, including a base body and a boss, which is arranged on a side wall of the base body along its thickness direction, and is used to press the electrode ears so that it is pre-tightened before welding, thereby omitting the pre-welding step.
By omitting the pre-welding operation before welding the electrode and the adapter, the welding efficiency is significantly improved, and the gap between the electrode and the adapter is effectively reduced, thereby improving the welding quality and yield of the molded battery.
Smart Images
Figure CN222562915U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of battery production, in particular to an adapter and a battery. Background Art
[0002] In the battery, an adapter is usually used to connect the battery tab and the battery top cover (pole). Specifically, one side wall of the adapter along the thickness direction is welded to the battery top cover, and the other side wall is welded to the tab of the battery cell, so as to achieve normal transmission of current.
[0003] In the related art, the overall thickness of the adapter is uniform. When the adapter needs to be welded to the tab, the tab needs to be pre-welded before laser welding to ensure the welding strength and welding stability between the adapter and the tab because the welding surface of the adapter is relatively smooth. Therefore, the welding process between the tab and the adapter is complicated and the welding efficiency is low. Utility Model Content
[0004] The main purpose of the utility model is to provide an adapter and a battery, aiming to solve the technical problem of low welding efficiency between the adapter and the tab.
[0005] To achieve the above-mentioned purpose, the first embodiment of the utility model provides an adapter for connecting a battery tab and a top cover, the adapter comprising:
[0006] matrix;
[0007] A boss is provided on one side wall of the substrate along the thickness direction thereof, and the boss is used for welding the tab;
[0008] The boss is suitable for pressing the pole lug to deform the pole lug, so as to pre-tighten the pole lug before welding the pole lug.
[0009] In some embodiments, along the thickness direction, the base has a first thickness H1, and the boss has a second thickness H2, wherein H1:H2 is 0.25-4.
[0010] In some embodiments, the first thickness H1 is 0.5 mm to 2 mm, and the second thickness H2 is 0.5 mm to 3 mm.
[0011] In some embodiments, the plane of the substrate facing the boss is a projection plane, and along the thickness direction, the substrate forms a first orthographic projection S1 on the projection plane, and the boss forms a second orthographic projection S2 on the projection plane, wherein S1:S2 is 3-6.
[0012] In some embodiments, the area of the first orthographic projection S1 is 300 mm 2 ~810mm 2; The area of the second orthographic projection S2 is 60mm 2 ~250mm 2 .
[0013] In some embodiments, along a first direction, the cross-sectional area of the substrate along the thickness direction is uniformly arranged, and the first direction is perpendicular to the thickness direction.
[0014] In some embodiments, along the thickness direction, the boss has a first end close to the base and a second end away from the base, wherein a cross-sectional area of the first end along the first direction is greater than a cross-sectional area of the second end along the first direction.
[0015] In some embodiments, a cross-sectional area of the boss along the first direction increases non-uniformly from the first end to the second end.
[0016] In some embodiments, the adapter includes a plurality of bosses, and the bosses are spaced apart along the first direction.
[0017] A second embodiment of the present invention provides a battery, which includes the adapter as described in the above embodiment.
[0018] Compared with the prior art, the beneficial effects of the utility model are:
[0019] In the technical solution of the utility model, the adapter includes a base and a boss, and the boss is arranged on a side wall of the base along the thickness direction thereof, and the boss is used to weld the pole ear. In the prior art, the overall thickness of the adapter is uniform, that is, the adapter only includes the base, so the welding surface of the adapter is smooth, and in order to ensure the welding quality, the multi-layer pole ears need to be pre-welded before being welded with the base. In this solution, the adapter includes a base and a boss, and the boss can press the pole ear to deform the pole ear, that is, the pole ear can be pre-tightened before welding the pole ear and then directly welded, so this solution can omit the pre-welding operation of the pole ear before welding the pole ear and the adapter, effectively improving the welding efficiency. In addition, because the boss presses the pole ear, the gap between the pole ears in the multi-layer pole ears and the gap between the pole ears and the adapter can be effectively reduced, so that the pole ears are more closely fitted to the adapter, ensuring the welding quality of the pole ears and improving the yield rate of the formed battery. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.
[0021] Figure 1 It is a schematic diagram of the structure of a battery in an embodiment of the utility model; wherein the adapter is not shown;
[0022] Figure 2 is a cross-sectional schematic diagram of a battery in one embodiment of the utility model;
[0023] Figure 3 for Figure 2 A local enlarged schematic diagram of the middle A;
[0024] Figure 4 It is a schematic diagram of the structure of the adapter in one embodiment of the utility model; wherein the top surface of the boss is a plane and the two side surfaces are arc surfaces;
[0025] Figure 5 It is a side view of an adapter in one embodiment of the utility model, wherein the first end and the second end are shown;
[0026] Figure 6 It is a schematic diagram of the structure of the adapter in one embodiment of the utility model; wherein the top surface of the boss is a plane and the two side surfaces are arc surfaces plus inclined planes;
[0027] Figure 7 Schematic diagram of the structure of the adapter in one embodiment of the utility model; wherein the top surface of the boss is a semi-elliptical surface and the top surface is directly connected to the side wall of the base;
[0028] Figure 8 It is a schematic diagram of the structure of the adapter in one embodiment of the utility model; wherein the top surface of the boss is a plane and the four side surfaces are inclined planes;
[0029] Fig. 9 It is a schematic structural diagram of an adapter in an embodiment of the utility model; wherein the top surface of the boss is an arc surface and the top surface is directly connected to the side wall of the base.
[0030] Description of Figure Numbers:
[0031] Adapter 10;
[0032] Base body 100; Side wall 110;
[0033] Boss 200; first end 210; second end 220;
[0034] Battery 20;
[0035] Battery cell 201; tab 202; top cover 203; soldering element 204;
[0036] First direction X; thickness direction Y.
[0037] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0038] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0039] In the related art, the overall thickness of the adapter is uniform. When the adapter needs to be welded to the tab, the tab needs to be pre-welded before laser welding to ensure the welding strength and welding stability between the adapter and the tab because the welding surface of the adapter is relatively smooth. Therefore, the welding process between the tab and the adapter is complicated and the welding efficiency is low.
[0040] In view of this, the first embodiment of the present invention provides an adapter 10, which is used to connect the tab 202 and the top cover 203 of the battery 20. Figures 1 to 9 The adapter 10 according to the embodiment of the present application is introduced. Specifically, the adapter 10 includes a base 100 and a boss 200 .
[0041] Reference Figures 1 to 3 , the substrate 100 is used to connect the top cover 203 of the battery 20. Specifically, the substrate 100 can be connected to the pole of the battery 20. The outer contour of the substrate 100 can be set to a variety of shapes. In some embodiments, when the substrate 100 is used for a cylindrical battery 20, the outer contour of the substrate 100 can be set to a circular shape. In other embodiments, when the substrate 100 is used for a square battery 20, the outer contour of the substrate 100 can be set to a square shape. Some embodiments of the present application are described by taking the square substrate 100 as an example.
[0042] Reference Figure 3 and Figure 4 The boss 200 is used to weld the tab 202 on the battery cell 201. The specific location of the boss 200 is described below. The boss 200 is disposed on a side wall 110 of the substrate 100 along the thickness direction Y. It is understood that the boss 200 can be disposed on a side wall 110 of the substrate 100 along the thickness direction Y away from the top cover 203 of the battery 20, so as to Figure 3 The orientation in is used as a reference, that is, when the upper side wall 110 of the base 100 is used to weld the top cover 203 of the battery 20, the boss 200 can be arranged on the lower side wall 110 of the base 100.
[0043] It should be noted that in some embodiments, the boss 200 can be arranged integrally with the base 100. In other embodiments, the boss 200 can also be arranged separately from the base 100, that is, the boss 200 can be connected to the base 100 after being formed separately. Some embodiments of the present application are described by taking the boss 200 and the base 100 as an example.
[0044] The boss 200 is used to press the tab 202 to deform the tab 202, that is, the tab 202 can be pre-tightened before the boss 200 is welded to the tab 202, and the pre-welding process between the two is omitted to ensure the welding quality. It can be understood that a press-fitting tool can be used to press the tab 202 to the boss 200, and the specific structure of the press-fitting tool can be determined according to the actual situation. It should be noted that the boss 200 can be arranged in a solid manner, that is, it can avoid the situation where the boss 200 is burned through and separated from the substrate 100 when the boss 200 is welded to the tab 202, and effectively improve the connection strength between the boss 200 and the substrate 100.
[0045] In the technical solution of the present utility model, the adapter 10 includes a base 100 and a boss 200. The boss 200 is arranged on a side wall 110 of the base 100 along the thickness direction Y thereof, and the boss 200 is used for welding the pole ear 202. In the prior art, the overall thickness of the adapter is uniform, that is, the adapter only includes the base, so the welding surface of the adapter is smooth, and in order to ensure the welding quality, the multi-layer pole ears need to be pre-welded before being welded to the base. In this solution, the adapter 10 includes a base 100 and a boss 200. The boss 200 can press the pole ear 202 to deform the pole ear 202, that is, the pole ear 202 can be pre-tightened before welding the pole ear 202 and then directly welded. Therefore, this solution can omit the pre-welding operation of the pole ear before welding the pole ear 202 to the adapter 10, effectively improving the welding efficiency. Furthermore, since the boss 200 presses the tab 202 , the gap between the tab 202 and the adapter 10 can be effectively reduced, so that the tab 202 fits the adapter 10 , thereby ensuring the welding quality of the tab 202 and improving the yield rate of the molded battery 20 .
[0046] The relative thickness ratio between the substrate 100 and the boss 200 is introduced below. In some embodiments, along the thickness direction Y, the substrate 100 has a first thickness H1, and the boss 200 has a second thickness H2. Among them, H1:H2 is 0.25-4. Exemplarily, H1:H2 can be 0.25, 0.6, 0.7, 1.3, 2.2, 3.4 or 4. In this solution, the substrate 100 and the boss 200 adopt the above-mentioned thickness ratio relationship. On the one hand, it can ensure the pre-tightening effect of the boss 200 on the tab 202 and ensure the welding quality. On the other hand, it can also save its raw materials and reduce processing costs.
[0047] The following specifically introduces the thickness range of the substrate 100. In some embodiments, the first thickness H1 is 0.5 mm to 2 mm. For example, the first thickness H1 can be 0.5 mm, 0.75 mm, 1.5 mm, 1.75 mm, 1.9 mm or 2 mm.
[0048] The following specifically introduces the thickness range of the boss 200. The second thickness H2 is 0.5mm to 3mm. Exemplarily, the second thickness H2 can be 0.5mm, 1.0mm, 1.3mm, 1.5mm, 2.0mm, 2.5mm, 2.7mm or 3mm, etc. In this solution, the adapter 10 adopts the above-mentioned thickness range, which can not only ensure the welding quality between the adapter 10 and the tab 202 and the top cover 203, but also ensure the current transmission effect and improve the quality of the battery 20.
[0049] In order to facilitate the description and understanding of the proportion of the boss 200 on the substrate 100 along the thickness direction Y, a projection plane is defined. The plane of the substrate 100 facing the boss 200 is set as the projection plane. In some embodiments, along the thickness direction Y, the substrate 100 forms a first orthographic projection S1 on the projection plane. The boss 200 forms a second orthographic projection S2 on the projection plane. Among them, S1:S2 is 3 to 6. Exemplarily, S1:S2 can be 3, 3.2, 3.5, 3.8, 4, 4.4, 5, 5.2 or 6. In this solution, the boss 200 and the substrate 100 of the adapter 10 adopt the above-mentioned ratio range, that is, it can adapt to various specifications and types of battery 20 structures, ensure the welding quality between the various parts, and improve the yield rate of the battery 20.
[0050] The specific size setting of the substrate 100 is described below. Specifically, in some embodiments, the area of the first orthographic projection S1 is 300 mm 2 ~810mm 2 For example, the area of the first orthographic projection S1 may be 300 mm 2 、350mm 2 、460mm 2 、600mm 2 、780mm 2 or 810mm 2 wait.
[0051] The specific size setting of the boss 200 is described below. Specifically, the area of the second orthographic projection S2 is 60 mm 2 ~250mm 2 For example, the area of the second orthographic projection S2 may be 60 mm 2 , 100mm 2 、145mm 2 、180mm 2 , 240mm 2or 250mm 2 In this solution, by making the boss 200 and the base 100 have the above-mentioned size ratio, it can adapt to batteries 20 of various specifications and types, ensure the welding quality between various parts, and improve the yield rate of the battery 20.
[0052] Reference Figures 4 to 9 In order to facilitate the description and understanding of the thickness dimension setting of the substrate 100, a first direction X is defined, and the first direction X is perpendicular to the thickness direction Y. Figure 4 The first direction X may be a horizontal left-right direction, a horizontal front-back direction, or a horizontal inclined direction. Some embodiments of the present application are described by taking the first direction X pointing to the left-right direction as an example. In some embodiments, along the first direction X, the cross-sectional area of the substrate 100 along its thickness direction Y is uniformly arranged. In this solution, the substrate 100 adopts the above arrangement to ensure the welding strength between it and the top cover 203, and can reduce its own processing difficulty and reduce production costs.
[0053] Reference Figures 4 to 9 , the specific configuration of the boss 200 is described below. In some embodiments, along the thickness direction Y, the boss 200 has a first end 210 close to the substrate 100 and a second end 220 away from the substrate 100. Figure 5 The first end 210 of the boss 200 is the lower end, and the second end 220 is the upper end. In this solution, the cross-sectional area of the first end 210 of the boss 200 along the first direction X is greater than the cross-sectional area of the second end 220 along the first direction X, so that when the tab 202 is pressed onto the boss 200, the deformation effect of the tab 202 can be guaranteed, so that the tab 202 fits tightly to the adapter 10, the welding quality of the tab 202 and the adapter 10 is guaranteed, and the yield rate of the battery 20 is improved. It should be noted that the specific structural shape of the boss 200 can be determined according to actual conditions.
[0054] Reference Figure 5 In some embodiments, the cross-sectional area of the boss 200 along the first direction X increases non-uniformly from the first end 210 to the second end 220. Figure 8 In other embodiments, the cross-sectional area of the boss 200 along the first direction X may also increase uniformly from the first end 210 to the second end 220. Specifically, the cross-sectional area of the boss 200 along the first direction X may increase uniformly linearly or nonlinearly. The specific configuration of the boss 200 may be determined according to actual conditions. Some embodiments of the present application are described by taking the cross-sectional area of the boss 200 along the first direction X as an example of uniform increase.
[0055] The number of bosses 200 on the base 100 is introduced below. In some embodiments, the adapter 10 includes a plurality of bosses 200, and the bosses 200 are arranged at intervals along the first direction X. By providing a plurality of bosses 200, the present solution can further enhance the pre-tightening effect of the adapter 10 on the tab 202, thereby ensuring the stability of the connection between the tab 202 and the adapter 10. It can be understood that the intervals between the bosses 200 can be uniform intervals or non-uniform intervals. In other embodiments, the adapter 10 can also be provided with only a single boss 200. The specific number of bosses 200 can be determined according to actual conditions. Some of the present application will be described by taking the provision of a single boss 200 as an example.
[0056] The second embodiment of the utility model proposes a battery 20, which includes an adapter 10 as described in the above embodiment. The battery 20 in this solution can omit the pre-welding operation of the pole tab 202 before welding the pole tab 202 to the adapter 10, effectively improving the welding efficiency. In addition, since the boss 200 can press the pole tab 202, the gap between the pole tab 202 and the adapter 10 can be effectively reduced, so that the pole tab 202 fits the adapter 10, the welding quality of the pole tab 202 is guaranteed, and the yield rate of the formed battery 20 is improved.
[0057] It should be noted that in some embodiments, a flux 204 may be provided on the side of the tab 202 of the battery 20 that is away from the adapter 10. Specifically, the flux 204 may be provided in a sheet shape. By providing the flux 204, the present solution can further improve the welding effect between the tab 202 and the adapter 10, thereby ensuring the quality of the battery 20.
[0058] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.
[0059] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or", "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.
[0060] The above are only preferred embodiments of the present invention, and do not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the present invention.
Claims
1. An adapter (10) for connecting a tab (202) and a top cover (203) of a battery (20), characterized in that: The adapter (10) comprises: A substrate (100); A boss (200) is provided on a side wall (110) of the base (100) along the thickness direction thereof, and the boss (200) is used for welding the tab (202); The boss (200) is suitable for pressing the pole lug (202) to deform the pole lug (202), so as to pre-tighten the pole lug (202) before welding the pole lug (202).
2. The adapter (10) according to claim 1, characterized in that: Along the thickness direction, the base (100) has a first thickness H1, and the boss (200) has a second thickness H2, wherein H1:H2 is 0.25-4.
3. The adapter (10) according to claim 2, characterized in that: The first thickness H1 is 0.5 mm to 2 mm, and the second thickness H2 is 0.5 mm to 3 mm.
4. The adapter (10) according to claim 1, characterized in that: The plane of the base (100) facing the boss (200) is a projection plane, and along the thickness direction, the base (100) forms a first orthographic projection S1 on the projection plane, and the boss (200) forms a second orthographic projection S2 on the projection plane, wherein S1:S2 is 3 to 6.
5. The adapter (10) according to claim 4, characterized in that: The area of the first orthographic projection S1 is 300 mm 2 ~810mm 2 ; The area of the second orthographic projection S2 is 60mm 2 ~250mm 2 .
6. The adapter (10) according to claim 1, characterized in that: Along a first direction, the cross-sectional area of the substrate (100) along the thickness direction is uniformly arranged, and the first direction is perpendicular to the thickness direction.
7. The adapter (10) according to claim 6, characterized in that: Along the thickness direction, the boss (200) has a first end (210) close to the base (100) and a second end (220) away from the base (100), wherein the cross-sectional area of the first end (210) along the first direction is greater than the cross-sectional area of the second end (220) along the first direction.
8. The adapter (10) according to claim 7, characterized in that: From the first end (210) to the second end (220), the cross-sectional area of the boss (200) along the first direction increases non-uniformly.
9. The adapter (10) according to claim 7, characterized in that: The adapter (10) comprises a plurality of bosses (200), and each of the bosses (200) is arranged at intervals along a first direction.
10. A battery (20), characterized in that: It comprises the adapter (10) as claimed in any one of claims 1 to 9.