Positioning structure and battery top cover sheet

Abstract

The utility model discloses a positioning structure which comprises a lower insulating plate body, a through hole which is adapted to a pole part is formed on the lower insulating plate body, a first positioning convex part for positioning a pole convex ring is arranged on the lower surface of the lower insulating plate body, and a second positioning convex part for positioning a connecting lug is arranged on the lower surface of the lower insulating plate body on both sides of the through hole. The utility model also discloses a battery top cover sheet which comprises the above positioning structure. The utility model enables the connecting lug to be stably positioned relative to the lower insulating plate body, and ensures that the connecting lug will not be deformed or deviated during long-term use.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery technology, and in particular to a positioning structure and a battery top cover. Background Technology

[0002] Batteries are a crucial component of new energy vehicles, and currently, most new energy batteries use lithium-ion batteries. The terminals are a part of the battery, mainly consisting of the terminal portion and a terminal ring surrounding the terminal portion. The terminal ring usually has connecting ears for connecting the battery cells. The shape or structure of the connecting ears determines the connection between the terminal and the cell. Currently, connecting ears on the market are usually separate from the terminals, meaning they are connected by welding or riveting. However, this method easily leads to poor contact of the connecting ears, causing them to separate from the terminals over time. A structure with an integrated terminal and connecting ear has emerged on the market, overcoming the problems of separate connecting ears. However, it is prone to deformation or misalignment. Therefore, a positioning structure is urgently needed to position this integrated connecting ear. Utility Model Content

[0003] The purpose of this utility model is to design a positioning structure and a battery top cover to overcome the shortcomings of the above-mentioned technologies.

[0004] This utility model designs a positioning structure for positioning an electrode post. The electrode post includes an electrode post portion, an electrode post protrusion ring surrounding the outer periphery of the electrode post portion, and connecting ears distributed on opposite sides of the electrode post protrusion ring. It includes a lower insulating plate body. The lower insulating plate body has a through hole adapted to the electrode post portion. The lower surface of the lower insulating plate body has a first positioning protrusion for positioning the electrode post protrusion ring. The lower surface of the lower insulating plate body has a second positioning protrusion for positioning the connecting ears on both sides of the through hole.

[0005] Preferably, the first positioning protrusion is integrally connected to the lower insulating plate.

[0006] In a further optimization, the first positioning protrusion includes an arc-shaped surface that extends along the edge of the pole post protrusion and forms an adapted arc-shaped surface with the outer peripheral wall of the pole post protrusion, the arc-shaped surface being attached to and abutting against the outer peripheral wall of the pole post protrusion.

[0007] Further optimization involves an integral connection between the second positioning protrusion and the lower insulating plate.

[0008] Further optimization involves the connecting ear being rectangular, with one short side of the connecting ear connected to the pole post protrusion ring. The second positioning protrusion includes protrusion one, protrusion two, and protrusion three. Protrusion one and protrusion two respectively attach to and abut against the corresponding two long sides of the connecting ear, while protrusion three attaches to and abuts against one short side of the connecting ear.

[0009] Further optimization involves staggering the first and second protrusions along the width direction of the connecting ear.

[0010] Further optimization involves making the third protrusion an L-shaped protrusion. Of its two inward-facing sides, one side is attached to and supported on the bottom surface of the connecting ear, while the other side is attached to and abuts against the short side of the connecting ear.

[0011] Further optimization involves adjusting the height of the first and second positioning protrusions so that they are lower than the connecting ear.

[0012] This utility model also designs a battery top cover sheet, which includes a top cover assembly and the aforementioned positioning structure. The top cover assembly includes a top cover, a terminal post, an upper insulating component, and a guide protrusion. The top cover is fitted and connected to the upper surface of the lower insulating plate. The top cover has a mounting hole that penetrates the lower insulating plate. The terminal post is inserted into the mounting hole and its top extends out of the mounting hole. The upper insulating component is located above the mounting hole and is fitted and connected to the top cover. The guide protrusion is connected to the top of the terminal post. The terminal post portion passes through the through hole and the mounting hole from bottom to top. The terminal post protrusion abuts against the bottom surface of the lower insulating plate.

[0013] Preferably, the same top cover has two mounting holes, each mounting hole containing a pole post, an upper insulating component, a conductive protrusion, and a positioning structure, and the pole post is formed into a positive and a negative pole post depending on the different materials of the pole post.

[0014] The technical advantage of this utility model is that the pole includes a pole part and a pole protrusion ring disposed around the pole part. The pole protrusion ring is provided with an integral connecting ear. Two connecting ears are distributed on opposite sides of the pole protrusion ring and are offset. When the pole is installed on the top cover, the pole protrusion ring is fitted onto the lower insulating plate. A certain gap is formed between the connecting ear and the lower insulator. The bottom surface of the lower insulator is provided with a second positioning protrusion and a second positioning protrusion along the edge of the connecting ear and the pole protrusion ring, respectively. This allows the connecting ear to be stably positioned relative to the lower insulating plate, ensuring that the connecting ear will not deform or shift during long-term use. Attached Figure Description

[0015] Figure 1 This is a bottom structural diagram of the insulating plate in this utility model;

[0016] Figure 2 This is a bottom structural diagram of the overall structure of this utility model;

[0017] Figure 3 This is one of the overall structural cross-sectional views of this utility model;

[0018] Figure 4 This is an exploded view of the overall structure of this utility model from a bottom-up perspective;

[0019] Figure 5 This is an exploded view of the overall structure of this utility model from a top perspective;

[0020] Figure 6 This is the second sectional view of the overall structure of this utility model.

[0021] In the diagram: 1. Pole post; 2. Pole post protrusion ring; 3. Connecting ear; 4. Lower insulating plate; 5. Through hole; 6. First positioning protrusion; 61. Arc-shaped surface; 7. Second positioning protrusion; 71. Protrusion one; 72. Protrusion two; 73. Protrusion three; 8. Gap; 9. Top cover; 91. Mounting hole; 10. Upper insulating component; 11. Conductor protrusion; 12. Sealing ring. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0023] This utility model provides a positioning structure for positioning an electrode post. The electrode post includes an electrode post portion 1, an electrode post protrusion ring 2, and connecting ears 3. The electrode post protrusion ring 2 is arranged around the outer periphery of the electrode post portion 1, and the two connecting ears 3 are distributed on opposite sides of the electrode post protrusion ring 2 and extend out from the electrode post protrusion ring 2, that is, the connecting ears 3 and the electrode post protrusion ring 2 are integrated.

[0024] The positioning structure includes a lower insulating plate 4, on which a through hole 5 adapted to the pole post 1 is provided. The lower surface of the lower insulating plate 4 is provided with a first positioning protrusion 6 for positioning the pole post protrusion ring 2. The lower surface of the lower insulating plate 4 is provided with a second positioning protrusion 7 on both sides of the through hole 5 for positioning the connecting ear 3. The first positioning protrusion 6 and the second positioning protrusion 7 are respectively positioned by the pole post protrusion ring 2 and the connecting ear 3, so that the pole post and the lower insulating plate can be stably connected.

[0025] Furthermore, the first positioning protrusion 6 is integrally connected with the lower insulating plate 4, that is, the first positioning protrusion 6 extends out from the lower insulating plate 4.

[0026] Furthermore, the first positioning protrusion 6 is a protruding strip structure that extends along the edge of the pole post protrusion ring 2 and is adapted to the outer peripheral wall of the pole post protrusion ring 2. Since the cross-section of the outer peripheral wall of the pole post protrusion ring 2 is circular, the surface of the protruding strip structure facing the pole post protrusion ring 2 is an arc-shaped surface 61. The arc-shaped surface 61 fits against and abuts against the outer peripheral wall of the pole post protrusion ring 2, thereby positioning the pole post protrusion ring 2 so that the pole post protrusion ring 2 and the lower insulating plate 4 are positioned. It should be noted that the two connecting ears 3 extend in the same direction and are offset relative to the radial direction of the pole post protrusion ring 2 at their connection points. That is, the two connecting ears 3 extend from the pole post protrusion ring 2. From a top view, the connection points of the connecting ears 3 and the pole post protrusion ring 2 are not located at the radial ends of the pole post protrusion ring 2, but are slightly offset and not on the same diameter. The two connecting ears 3 extend in the same direction, thus forming a rectangular sheet structure. The upper surface of the connecting ears 3 is a horizontal plane, that is, the surface of the connecting ears 3 facing the pole post 1 is a horizontal plane. Therefore, the two connecting ears 3 divide the outer peripheral wall of the pole post protrusion ring 2 into two arc-shaped parts of different lengths. Therefore, there are also two convex structures, which are correspondingly attached to and abut against the two arc-shaped parts of different lengths of the connecting ears 3 to ensure the stability of the pole post protrusion ring 2.

[0027] Furthermore, the second positioning protrusion 7 is integrally connected with the lower insulating plate 4, that is, the second positioning protrusion 7 extends out from the lower insulating plate 4.

[0028] Furthermore, the connecting ear 3 is rectangular, and one of its short sides is connected to the pole post protrusion ring 2. The second positioning protrusion 7 includes protrusion 1 71, protrusion 2 72 and protrusion 3 73. Protrusion 1 71 and protrusion 2 72 respectively attach to and abut against the corresponding two long sides of the connecting ear 3, and protrusion 3 73 attaches to and abuts against one short side of the connecting ear 3. All three protrusions are convex strip structures and are straight like the sides of the connecting ear 3, so that the three protrusions can attach to and abut against the sides of the connecting ear 3, thereby positioning the connecting ear 3.

[0029] Furthermore, protrusion 1 71 and protrusion 2 72 are staggered along the width direction of the connecting ear 3. Since the connecting ear 3 in this embodiment is rectangular, there is only one protrusion 1 71 and one protrusion 2 72. They are staggered relative to the two long sides of the connecting ear 3, which makes the positioning of the connecting ear 3 more stable.

[0030] Furthermore, the protrusion 3 73 is an L-shaped protrusion. One of its two inward-facing sides is attached to and supported on the bottom surface of the connecting ear 3, while the other side is attached to and abuts against the short side of the connecting ear 3. Since the connection between the connecting ear 3 and the pole post protrusion 2 is a stepped surface, when the pole post protrusion 2 is attached to the bottom surface of the lower insulating plate 4, the connecting ear 3 and the bottom surface of the lower insulating plate 4 are not attached. This design is to avoid melting the lower insulating plate 4 at high temperature when welding the connecting ear 3 to the battery cell. Therefore, a certain gap 8 is left between the connecting ear 3 and the bottom surface of the lower insulating plate 4, that is, the connecting ear 3 is suspended. The L-shaped protrusion can support the connecting ear 3, so that the connecting ear 3 can be fixed without contact with the lower insulating plate 4.

[0031] Furthermore, the gap 8 between the connecting ear 3 and the bottom surface of the lower insulating plate 4 is typically 0.2 mm.

[0032] Furthermore, the height of the first positioning protrusion 6 and the second positioning protrusion 7 is lower than that of the connecting ear 3, so that the two positioning protrusions will not interfere with the connecting ear 3.

[0033] This utility model discloses a battery top cover sheet, which includes a top cover assembly and the aforementioned positioning structure. The top cover assembly includes a top cover 9, a terminal post, an upper insulating member 10, and a guide protrusion 11. The top cover 9 is attached to the upper surface of the lower insulating plate 4. The top cover 9 has a mounting hole 91 that penetrates the lower insulating plate 4. The terminal post is inserted into the mounting hole 91 and its top extends out of the mounting hole 91. A sealing ring 12 is provided between the terminal post and the top cover 9. The upper insulating member 10 is located above the mounting hole 91 and is attached to the top cover 9. The guide protrusion 11 is connected to the top of the terminal post by welding. The terminal post portion 1 of the terminal post passes through the through hole 5 and the mounting hole 91 from bottom to top. The terminal post protrusion ring 2 abuts against the bottom surface of the lower insulating plate 4, thereby forming a complete battery top cover sheet 9.

[0034] Furthermore, the same top cover 9 is provided with two mounting holes 91. Each mounting hole 91 is provided with a pole, an upper insulating component 10, a conductive protrusion 11 and a positioning structure. Positive and negative poles are formed according to the different materials of the pole. That is, in this embodiment, the poles are divided into positive and negative poles according to the different materials of the connection structure. When the pole material is aluminum, the pole is the positive pole. When the pole material is copper, the pole is the negative pole.

[0035] This utility model is not limited to the above-described preferred embodiments. Anyone can derive other forms of products under the guidance of this utility model. However, regardless of any changes made in their shape or structure, any technical solution that is the same as or similar to this application falls within the protection scope of this utility model.

Claims

1. A positioning structure for positioning an electrode post, the electrode post comprising an electrode post portion (1), an electrode post protrusion ring (2) surrounding the outer periphery of the electrode post portion (1), and connecting ears (3) distributed on opposite sides of the electrode post protrusion ring (2), characterized in that, It includes a lower insulating plate (4), on which a through hole (5) adapted to the pole post (1) is provided. The lower surface of the lower insulating plate (4) is provided with a first positioning protrusion (6) for positioning the pole post protrusion ring (2). The lower surface of the lower insulating plate (4) is provided with a second positioning protrusion (7) for positioning the connecting ear (3) on both sides of the through hole (5).

2. The positioning structure according to claim 1, characterized in that, The first positioning protrusion (6) is integrally connected to the lower insulating plate (4).

3. The positioning structure according to claim 2, characterized in that, The first positioning protrusion (6) includes an arc-shaped surface (61) extending along the edge of the pole post protrusion (2) and forming a fit with the outer peripheral wall of the pole post protrusion (2), the arc-shaped surface (61) fitting and abutting against the outer peripheral wall of the pole post protrusion (2).

4. A positioning structure according to claim 2, characterized in that, The second positioning protrusion (7) is integrally connected to the lower insulating plate (4).

5. A positioning structure according to claim 4, characterized in that, The connecting ear (3) is rectangular. One of the short sides of the connecting ear (3) is connected to the pole post protrusion (2). The second positioning protrusion (7) includes a first protrusion (71), a second protrusion (72) and a third protrusion (73). The first protrusion (71) and the second protrusion (72) are respectively attached to and abut against the corresponding two long sides of the connecting ear (3), and the third protrusion (73) is attached to and abut against one short side of the connecting ear (3).

6. A positioning structure according to claim 5, characterized in that, The protrusions 1 (71) and 2 (72) are staggered along the width direction of the connecting ear (3).

7. A positioning structure according to claim 6, characterized in that, The protrusion 3 (73) is an L-shaped protrusion. One of its two inward-facing sides is attached to and supported on the bottom surface of the connecting ear (3), while the other side is attached to and abuts against the short side of the connecting ear (3).

8. A positioning structure according to claim 7, characterized in that, The height of the first positioning protrusion (6) and the second positioning protrusion (7) is lower than that of the connecting ear (3).

9. A battery top cover sheet, characterized in that, The device includes a top cover assembly and a positioning structure as described in any one of claims 1 to 8. The top cover assembly includes a top cover (9), a pole post, an upper insulating member (10), and a guide protrusion (11). The top cover (9) is fitted to the upper surface of the lower insulating plate (4). The top cover (9) has a mounting hole (91) that penetrates the lower insulating plate (4). The pole post is inserted into the mounting hole (91) and its top extends out of the mounting hole (91). The upper insulating member (10) is located above the mounting hole (91) and fitted to the top cover (9). The guide protrusion (11) is connected above the pole post. The pole post portion (1) of the pole post passes through the through hole (5) and the mounting hole (91) from bottom to top. The pole post protrusion ring (2) abuts against the bottom surface of the lower insulating plate (4).

10. A battery top cover sheet according to claim 9, characterized in that, Two mounting holes (91) are provided on the same top cover (9). Each mounting hole (91) contains a pole post, an upper insulating part (10), a conductive protrusion (11) and a positioning structure, and positive and negative pole posts are formed according to different materials of the pole post.

Images