All-tab battery connecting piece structure

Abstract

The utility model relates to the technical field of battery connecting pieces, in particular to a full-tab battery connecting piece structure which comprises a confluence plate, a connecting strip is fixedly connected to one end of the confluence plate, a connector is fixedly connected to one end, deviating from the confluence plate, of the connecting strip, two U-shaped welding grooves are formed in the confluence plate, and the edges of the U-shaped welding grooves are the edges of the welding grooves. The distance between the edge of the welding groove and the edge of the confluence disc is 2mm, the height of the back face of the U-shaped welding groove protruding out of the confluence disc is 1-2mm, a press-fit area used for being matched with press fit of a laser welding clamp is reserved in the middle of the confluence disc, a roll core is arranged at the bottom end of the confluence disc, and the protruding part of the U-shaped welding groove is welded to the rolling plane of the roll core. Due to the fact that the U-shaped welding groove protrudes out of the back face of the confluence plate by 1-2 mm, the U-shaped welding groove is tightly attached to the rolling core rolling plane, the confluence plate is tightly pressed on the rolling core rolling plane through the reserved pressing area and the laser welding clamp, it is guaranteed that laser welding of the confluence plate and the rolling core rolling plane is firm, and pseudo soldering is avoided.

Description

Technical Field

[0001] The utility model relates to a battery connecting piece, in particular to a full-ear battery connecting piece structure, belonging to the technical field of battery connecting pieces. Background Art

[0002] The full-tab cylindrical battery includes a winding core, a connecting piece, a shell and a cover plate structure. The connecting piece is a key component of the full-tab battery and is the bridge between the winding core and the cover plate. One end of the connecting piece is welded to the winding core and the other end is welded to the cover plate.

[0003] After the end face of the full-ear core is flattened, the outer circle of the end face is an arc surface and the inner circle is a flat surface. When the existing connecting piece is welded to the end face of the core, it is very easy to weld to the outer circle of the core, resulting in loose welding. The connection stability between the connecting piece and the core is poor, affecting the production quality of the battery. Utility Model Content

[0004] The purpose of the present utility model is to provide a full-ear battery connector structure in order to solve the above-mentioned problem. Since the U-shaped welding groove protrudes 1-2mm from the back of the busbar, the U-shaped welding groove will fit tightly with the kneading surface of the core. A pressing area for the laser welding fixture is reserved in the middle of the busbar. The laser welding fixture presses the busbar tightly on the kneading surface of the core to ensure that the laser welding of the busbar and the kneading surface of the core is firm, avoiding poor welding and explosion.

[0005] The utility model achieves the above-mentioned purpose through the following technical scheme: a full-ear battery connecting piece structure, including a busbar, one end of the busbar is fixedly connected to a connecting strip, the end of the connecting strip facing away from the busbar is fixedly connected to a connecting head, and two U-shaped welding grooves are provided on the busbar, the edge of the U-shaped welding groove is the edge of the welding groove, the distance between the edge of the welding groove and the edge of the busbar is 2mm, the back side of the U-shaped welding groove protrudes from the busbar by 1-2mm, and a pressing area is reserved in the middle of the busbar for cooperating with a laser welding fixture for pressing.

[0006] Preferably, a small hole is formed on the busbar, and a moon-shaped notch is formed at one end of the busbar away from the connecting strip.

[0007] Preferably, a U-shaped notch is provided on each side of the busbar, and the two U-shaped notches are symmetrically arranged.

[0008] Preferably, two arc-shaped notches are provided at one end of the busbar close to the connecting bar, and the two arc-shaped notches are symmetrically arranged.

[0009] Preferably, a first bending groove is provided at a connection between the busbar and the connecting strip, and a second bending groove is provided at a connection between the connecting strip and the connecting head.

[0010] Preferably, the connecting head is provided with two circular holes, and the connecting head is riveted to the cover plate through the circular holes.

[0011] Preferably, a plurality of welding points are provided inside the U-shaped welding groove, and the plurality of welding points are evenly distributed in the U-shaped welding groove.

[0012] Preferably, the busbar is welded to the winding core through a plurality of the welding points, and the winding core is installed inside the aluminum shell.

[0013] The beneficial effects of the utility model are as follows: a connecting strip is fixedly connected to one end of the busbar, a connecting head is fixedly connected to the end of the connecting strip facing away from the busbar, two U-shaped welding grooves are provided on the busbar, the edge of the U-shaped welding groove is the edge of the welding groove, the distance between the edge of the welding groove and the edge of the busbar is 2mm, the back side of the U-shaped welding groove protrudes from the busbar by 1-2mm, a pressing area for cooperating with a laser welding fixture is reserved in the middle of the busbar, a winding core is provided at the bottom end of the busbar, and the protruding part of the U-shaped welding groove is welded to the kneading surface of the winding core; since the U-shaped welding groove protrudes from the back side of the busbar by 1-2mm, the U-shaped welding groove will fit tightly with the kneading surface of the winding core, and the laser welding fixture will press the busbar tightly onto the kneading surface of the winding core through the reserved pressing area, thereby ensuring that the laser welding of the busbar and the kneading surface of the winding core is firm and avoiding poor welding and explosion. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the connection structure between the busbar and the U-shaped welding groove of the utility model;

[0016] Figure 3 This is a schematic diagram of the connection structure between the connecting piece and the connecting head of the utility model;

[0017] Figure 4 It is a schematic diagram of the connection structure between the winding core and the aluminum shell of the utility model.

[0018] In the figure: 1. busbar; 2. connecting strip; 3. connector; 4. round hole; 5. moon-shaped notch; 6. U-shaped welding groove; 7. welding groove edge; 8. arc-shaped notch; 9. U-shaped notch; 10. first bending groove; 11. second bending groove; 12. pressing area; 13. small hole; 14. welding point; 15. winding core; 16. aluminum shell; 17. cover plate. DETAILED DESCRIPTION

[0019] 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 in 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.

[0020] See also Figure 1-4 As shown, a full-ear battery connecting piece structure includes a busbar 1, characterized in that: a connecting strip 2 is fixedly connected to one end of the busbar 1, and a connecting head 3 is fixedly connected to the end of the connecting strip 2 facing away from the busbar 1, and two U-shaped welding grooves 6 are provided on the busbar 1, and the edge of the U-shaped welding groove 6 is a welding groove edge 7, and the distance between the welding groove edge 7 and the edge of the busbar 1 is 2mm, and the back of the U-shaped welding groove 6 protrudes from the busbar 1 by 1-2mm, and a pressing area 12 for cooperating with a laser welding fixture is reserved in the middle of the busbar 1, and a winding core 15 is provided at the bottom end of the busbar 1, and the protruding part of the U-shaped welding groove 6 is flatly welded to the winding core 15.

[0021] As a technical optimization solution of the utility model, a small hole 13 is opened on the busbar 1, and a moon-shaped notch 5 is provided at the end of the busbar 1 away from the connecting strip 2; a U-shaped notch 9 is provided on each side of the busbar 1, and the two U-shaped notches 9 are symmetrically arranged, which is conducive to electrolyte seepage and improves injection efficiency.

[0022] As a technical optimization solution of the utility model, two arc-shaped notches 8 are provided at one end of the busbar 1 close to the connecting bar 2, and the two arc-shaped notches 8 are symmetrically arranged; a first bending groove 10 is provided at the connection between the busbar 1 and the connecting bar 2, and a second bending groove 11 is provided at the connection between the connecting bar 2 and the connecting head 3, so as to facilitate automatic bending of the connecting bar 2 and the connecting head 3 by equipment and improve production efficiency.

[0023] As a technical optimization solution of the present invention, two circular holes 4 are provided on the connecting head 3 , and the connecting head 3 is riveted to the cover plate 17 through the circular holes 4 , so as to facilitate the installation of the cover plate 17 .

[0024] As a technical optimization solution of the utility model, a plurality of welding points 14 are provided inside the U-shaped welding groove 6, and the plurality of welding points 14 are evenly distributed inside the U-shaped welding groove 6; the busbar 1 is welded to the kneaded surface of the winding core 15 through the plurality of welding points 14, and the winding core 15 is installed inside the aluminum shell 16, so as to facilitate the installation of the assembled busbar 1 and the winding core 15 inside the aluminum shell 16.

[0025] When the utility model is in use, during welding, the back side of the busbar 1 is fitted together with the kneading surface of the winding core 15. Since the U-shaped welding groove 6 protrudes 1-2mm from the back side of the busbar 1, the U-shaped welding groove 6 will be closely fitted with the kneading surface of the winding core 15. A pressing area 12 of the laser welding fixture is reserved in the middle of the busbar 1. The laser welding fixture presses the busbar 1 tightly on the kneading surface of the winding core 15 to ensure that the laser welding of the busbar 1 and the kneading surface of the winding core 15 is firm, avoiding poor welding and explosion. The edge 7 of the welding groove is 2mm away from the edge of the busbar 1. The laser welding points 14 will be distributed in the U-shaped welding groove 6 to avoid welding the welding points 14 with the outer arc surface of the kneading surface of the winding core 15, avoiding empty welding and poor welding. The flow plate 1 is provided with a small hole 13, the bottom of the collection plate 1 adopts a moon-shaped notch 5, and the two sides are designed with U-shaped notches 9, which are conducive to the electrolyte infiltration and improve the injection efficiency. The arc notch 8, the first bending groove 10 and the second bending groove 11 facilitate the automatic bending of the connecting strip 2 and the connecting head 3 by equipment to improve production efficiency. A circular hole 4 is designed on the connecting head 3 for riveting the connecting head 3 and the cover plate 17. After the cover plate 17 is installed, the collection plate 1 is welded to the winding core 15, and then the winding core 15 is loaded into the aluminum shell 16, completing the installation of the winding core 15 and the cover plate 17, and then the connecting strip 2 and the connecting head 3 are bent through the first bending groove 10 and the second bending groove 11, and the cover plate 17 is installed on the aluminum shell 16.

[0026] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0027] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A full-tab battery connecting piece structure, comprising a busbar (1), characterized in that: One end of the busbar (1) is fixedly connected to a connecting strip (2), and one end of the connecting strip (2) facing away from the busbar (1) is fixedly connected to a connecting head (3). The busbar (1) is provided with two U-shaped welding grooves (6), the edge of the U-shaped welding groove (6) is a welding groove edge (7), the distance between the welding groove edge (7) and the edge of the busbar (1) is 2 mm, the back of the U-shaped welding groove (6) protrudes from the busbar (1) by 1-2 mm, a pressing area (12) for cooperating with a laser welding fixture for pressing is reserved in the middle of the busbar (1), a winding core (15) is provided at the bottom end of the busbar (1), and the protruding part of the U-shaped welding groove (6) is flatly welded to the winding core (15).

2. A full-tab battery connector structure according to claim 1, characterized in that: The busbar (1) is provided with a small hole (13), and the end of the busbar (1) facing away from the connecting strip (2) is provided with a moon-shaped notch (5).

3. The full-tab battery connector structure according to claim 1, characterized in that: A U-shaped notch (9) is respectively provided on both sides of the busbar (1), and the two U-shaped notches (9) are symmetrically arranged.

4. The full-tab battery connector structure according to claim 1, characterized in that: Two arc-shaped notches (8) are provided at one end of the busbar (1) close to the connecting bar (2), and the two arc-shaped notches (8) are symmetrically arranged.

5. The full-tab battery connector structure according to claim 1, characterized in that: A first bending groove (10) is provided at the connection between the busbar (1) and the connecting strip (2), and a second bending groove (11) is provided at the connection between the connecting strip (2) and the connecting head (3).

6. The full-tab battery connector structure according to claim 1, characterized in that: The connecting head (3) is provided with two circular holes (4), and the connecting head (3) is riveted to the cover plate (17) through the circular holes (4).

7. The full-tab battery connector structure according to claim 1, characterized in that: A plurality of welding points (14) are arranged inside the U-shaped welding groove (6), and the plurality of welding points (14) are evenly distributed inside the U-shaped welding groove (6).

8. The full-tab battery connector structure according to claim 7, characterized in that: The busbar (1) is welded to a winding core (15) via a plurality of welding points (14); the winding core (15) is installed inside an aluminum shell (16).

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