Top cover, top cover module and battery cell

Abstract

This utility model relates to the field of battery technology, providing a top cover, a top cover module, and a battery cell. The top cover includes: a cover body and multiple sets of positioning components. The cover body has a pair of through holes for inserting terminals. Multiple sets of positioning components are disposed on the cover body, with each through hole and at least one long side of the cover body having a positioning component. Each positioning component includes: a positioning post and a protrusion. The protrusion is disposed adjacent to the long side of the cover body, and the positioning post is disposed between the through hole and the protrusion. The positioning post is used to insert into a connecting piece, and the protrusion is used to abut against the connecting piece. By providing the positioning post and protrusion on the cover body, the positioning post positions the connecting piece, and the protrusion supports the connecting piece, thereby shifting the center of gravity of the connecting piece upwards and preventing the portion of the connecting piece extending outside the cover body from tilting downwards. This ensures the contact area between the connecting piece and the terminal, thus guaranteeing the welding effect.

Description

Technical Field

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

[0002] In existing rectangular battery structure designs, the electrical connection between the terminal post and the tab is usually achieved using a metal connecting piece. The connecting piece needs to form a reliable electrical connection with the terminal post through a welding process. However, in actual production, it has been found that because the planar dimensions of the connecting piece exceed the edge of the top cover, the metal structure of its suspended portion will tilt downwards under the action of gravity. This causes a positional shift in the contact area between the connecting piece and the top cover, resulting in a reduction in the effective contact area between the welding surfaces and affecting the welding effect. Utility Model Content

[0003] This utility model provides a top cover, a top cover module, and a battery cell to solve the defect in the prior art where the suspended part of the connecting piece tilts downward under the action of gravity.

[0004] This utility model provides a top cover, comprising: a cover body having a pair of through holes for inserting an electrode post; and multiple positioning components disposed on the cover body, wherein each through hole is positioned between the positioning component and at least one long side of the cover body; each positioning component includes: a positioning post and a protrusion, wherein the protrusion is disposed adjacent to the long side of the cover body, the positioning post is disposed between the through hole and the protrusion, the positioning post is used to insert into a connecting piece, and the protrusion is used to abut against the connecting piece.

[0005] According to the present invention, the end face of the protrusion and the end face of the pole extending out of the through hole are located on the same plane.

[0006] According to the present invention, in a top cover module, the height of the positioning post is greater than the height of the protrusion.

[0007] This utility model also provides a top cover module, including: a top cover as described above; a pair of poles, each pole passing through a through hole; a plurality of connecting pieces, each connecting piece being connected to a set of positioning components, the connecting piece having a positioning hole, the positioning post of the positioning component passing through the positioning hole, the connecting piece abutting against the protrusion, and a portion of the connecting piece being welded to the pole.

[0008] According to the present invention, a top cover module includes a connecting piece comprising: a first body portion and a second body portion, wherein the first body portion is connected to the second body portion, the first body portion is provided with the positioning hole, a portion of the first body portion is used for welding connection with the pole post, and a portion of the first body portion abuts against the protrusion; the second body portion has a first position and a second position, wherein before the connecting piece is bent, the second body portion is in the first position and is located outside the cover body; after the connecting piece is bent, the second body portion is in the second position and is located on one side of the first body portion.

[0009] According to the top cover module provided by this utility model, the connecting piece further includes a third body portion, and the first body portion and the second body portion are connected through the third body portion; when the second body portion is in the first position, the third body portion is in a straight state, and when the second body portion is in the second position, the third body portion is in a bent state.

[0010] According to the present invention, a top cover module is provided in which the third body part is provided with a plurality of through slots along the length direction of the top cover, and the plurality of through slots are configured to form a folding part.

[0011] According to the present invention, a top cover module is provided in which the through grooves located at both ends of the third body part are connected to the ends of the third body part to form a notch.

[0012] According to the top cover module provided by this utility model, the connecting piece further includes a fourth body portion, which is connected to the second body portion; when the second body portion is in the second position, the fourth body portion is opposite to the cover body, and the fourth body portion is used to connect with the electrode tab.

[0013] This utility model also provides a battery cell, comprising: an electrode assembly having a plurality of tabs; and a top cover module as described above, wherein a connecting piece in the top cover module is connected to the tabs.

[0014] The top cover provided by this utility model has a positioning post and a protrusion on the cover body. The positioning post is used to position the installation position of the connecting piece, and the protrusion is used to support the connecting piece. This allows the center of gravity of the connecting piece to move upward, preventing the part of the connecting piece extending outside the cover body from tilting downward, ensuring the contact area between the connecting piece and the pole post, and thus ensuring the welding effect. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the top cover provided by this utility model.

[0017] Figure 2 This is a structural schematic diagram of the top cover module provided by this utility model.

[0018] Figure 3 This is a schematic diagram of the battery cell provided by this utility model.

[0019] Figure label:

[0020] 1. Cover; 11. Positioning post; 12. Protrusion; 2. Pole post; 3. Connecting piece; 31. First body part; 32. Second body part; 33. Third body part; 34. Fourth body part; 311. Positioning hole; 331. Through groove; 332. Notch; 341. Strip block; 4. Pole group; 5. Pole lug. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0022] The following is combined with Figures 1-3 This invention describes the top cover, top cover module, and battery cell.

[0023] like Figure 1 As shown, in an embodiment of this utility model, the top cover includes: a cover body 1 and multiple sets of positioning components. The cover body 1 has a pair of through holes for inserting the pole post 2. Multiple sets of positioning components are disposed on the cover body 1, with each through hole and at least one long side of the cover body 1 having a positioning component. The positioning component includes: a positioning post 11 and a protrusion 12. The protrusion 12 is disposed adjacent to the long side of the cover body 1, and the positioning post 11 is disposed between the through hole and the protrusion 12. The positioning post 11 is used to insert into the connecting piece 3 to position the installation position of the connecting piece 3, and the protrusion 12 is used to abut against the connecting piece 3 to support the connecting piece 3.

[0024] Specifically, at least one set of positioning components can be set next to each through hole. Before welding the connecting piece 3 to the pole post 2, the connecting piece 3 is first inserted into the positioning post 11. Part of the connecting piece 3 abuts against the protrusion 12. The protrusion 12 supports the connecting piece 3, so that the center of gravity of the connecting piece 3 is moved up to the part of the connecting piece 3 located on the cover 1, thereby preventing the part of the connecting piece 3 outside the cover 1 from tilting downward.

[0025] Optionally, each positioning component may contain one or more positioning posts 11. When there are multiple positioning posts 11, the connecting piece 3 cannot rotate relative to the positioning posts 11, thus improving the positioning accuracy of the connecting piece 3. Correspondingly, the number of protrusions 12 may also be one or more. When there is only one protrusion, the width and length of the protrusion 12 should be as large as possible to increase the contact area with the connecting piece 3.

[0026] Optionally, in an embodiment of the present invention, a set of positioning components is provided between each through hole and each long side of the cover 1. That is, in this embodiment, a set of positioning components is provided on both sides of each through hole so that the two connecting pieces 3 are simultaneously welded to one pole post 2.

[0027] The top cover provided in this embodiment of the utility model has a positioning post and a protrusion on the cover body. The positioning post is used to position the installation position of the connecting piece, and the protrusion is used to support the connecting piece. This allows the center of gravity of the connecting piece to move upward, preventing the part of the connecting piece extending outside the cover body from tilting downward, ensuring the contact area between the connecting piece and the pole post, and thus ensuring the welding effect.

[0028] In this embodiment of the invention, the end face of the protrusion 12 and the end face of the pole post 2 extending out of the through hole are located on the same plane. After the connecting piece 3 is connected to the positioning post 11, the connecting piece 3 fits against the protrusion 12 and the pole post 2, ensuring the contact area between the connecting piece 3 and the pole post 2.

[0029] Furthermore, in an embodiment of this utility model, the height of the positioning post 11 is greater than the height of the protrusion 12, so that after the connecting piece 3 is inserted into the positioning post 11, the positioning post 11 can extend beyond the connecting piece 3, preventing the connecting piece 3 from detaching from the positioning post 11 and ensuring the positioning accuracy of the positioning post 11.

[0030] like Figure 2 As shown, this embodiment of the present invention also provides a top cover module, including: a top cover, a pair of poles 2, and a plurality of connecting pieces 3. The cover body 1 of the top cover has a pair of through holes, and each pole 2 passes through one through hole. Each connecting piece 3 is connected to a set of positioning components of the top cover. The connecting piece 3 has a positioning hole 311, and the positioning post 11 of the positioning component passes through the positioning hole 311. The connecting piece 3 abuts against the protrusion 12, and a portion of the connecting piece 3 is welded to the pole 2.

[0031] Specifically, the positioning post 11 of the positioning component is used to position the connecting piece 3. Before the connecting piece 3 is bent, part of the connecting piece 3 abuts against the protrusion 12 of the positioning component, and the remaining part extends outside the cover 1. The protrusion 12 supports the connecting piece 3, thereby shifting the center of gravity of the connecting piece 3 to the part of the connecting piece 3 located on the cover 1, so that the part of the connecting piece 3 extending outside the cover 1 will no longer tilt downward, ensuring the contact area between the connecting piece 3 and the pole post 2, and improving the welding quality.

[0032] The top cover module provided in this embodiment of the utility model has a positioning component on the cover body. The positioning post is used to position the installation position of the connecting piece, and the protrusion is used to support the connecting piece. This allows the center of gravity of the connecting piece to move, preventing the part of the connecting piece extending outside the cover body from tilting downwards, ensuring the contact area between the connecting piece and the pole post, and thus ensuring the welding effect.

[0033] like Figure 2 As shown, in an embodiment of this utility model, the connecting piece 3 includes a first body portion 31 and a second body portion 32. The first body portion 31 is connected to the second body portion 32. The first body portion 31 is provided with a positioning hole 311. A portion of the first body portion 31 is used for welding to the pole post 2, and the remaining portion of the first body portion 31 abuts against the protrusion 12. The second body portion 32 has a first position and a second position. Before the connecting piece 3 is bent, the second body portion 32 is in the first position, located outside the cover 1. After the connecting piece 3 is bent, the second body portion 32 is in the second position, located on one side of the first body portion 31.

[0034] Specifically, before the connecting piece 3 is bent, it is a flat plate; after the connecting piece 3 is bent, it is bent into two plates, which are arranged opposite to each other. In the embodiment of this utility model, each pole post 2 is welded to two first body parts 31, and the two connecting pieces 3 are symmetrically arranged about the center line of the pole post 2 as the axis of symmetry.

[0035] Furthermore, the connecting piece 3 also includes a third body portion 33, through which the first body portion 31 and the second body portion 32 are connected. When the second body portion 32 is in the first position, the third body portion 33 is in a straight state; when the second body portion 32 is in the second position, the third body portion 33 is in a bent state.

[0036] Specifically, by bending the third body portion 33, the second body portion 32 can be positioned opposite the first body portion 31. To facilitate bending of the third body portion 33, the third body portion 33 is provided with multiple through slots 331 along the length direction of the cover 1, and the multiple through slots 331 constitute a folding portion. Providing multiple through slots 331 can reduce the strength of the third body portion 33 when bent.

[0037] Furthermore, such as Figure 2 As shown, the through grooves 331 located at both ends of the third body part 33 are connected to the ends of the third body part 33 to form notches 332, so as to facilitate the bending and deformation of the third body part 33.

[0038] like Figure 2 As shown, in an embodiment of this utility model, the connecting piece 3 further includes a fourth body portion 34, which is connected to the second body portion 32. When the second body portion 32 is in the first position, both the fourth body portion 34 and the second body portion 32 are located outside the cover 1; when the second body portion 32 is in the second position, the second body portion 32 is disposed opposite to the first body portion 31, and the fourth body portion 34 is disposed opposite to the surface of the cover 1, wherein the fourth body portion 34 is used to connect with the tab 5.

[0039] like Figure 3 As shown, this embodiment of the utility model also provides a battery cell, including: a top cover module, an electrode group 4, and multiple electrode tabs 5. The electrode group 4 is provided with multiple electrode tabs 5, and the connecting piece 3 in the top cover module is welded to the electrode tabs 5.

[0040] Specifically, when the top cover module is welded to the tab 5, the second body part 32 of the connecting piece 3 is in the second position. At this time, the fourth body part 34 of the connecting piece 3 is welded to the tab 5, and the second body part 32 of the connecting piece 3 is fitted to the pole group 4.

[0041] The battery cell provided in this embodiment of the utility model, by setting a top cover module, avoids the part of the connecting piece extending outside the cover body from tilting downward, ensuring the contact area between the connecting piece and the electrode post, thereby ensuring the welding effect.

[0042] Furthermore, such as Figure 2 As shown, one end of the fourth body portion 34 of the connecting piece 3 extends from the end face towards the second body portion 32 to form a strip-shaped groove, thereby giving the tail of the fourth body portion 34 two strip-shaped blocks 341. In an embodiment of this utility model, each strip-shaped block 341 is connected to a tab 5, thus each fourth body portion 34 is provided with a pair of tabs 5. One side of each tab 5 is connected to the pole group 4, and the other side is a free side, so that there is a gap between the tab 5 and the pole group 4. The free sides of the pair of tabs 5 are arranged adjacent to each other, and each strip-shaped block 341 of the fourth body portion 34 is inserted into the gap formed by the tab 5 and the pole group 4. Then, the tab 5 and the strip-shaped block 341 are welded together.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A top cover, characterized in that, include: A cover body, wherein the cover body is provided with a pair of through holes for inserting an electrode post; Multiple positioning components are disposed on the cover, and each of the through holes is provided with a positioning component between it and at least one long side of the cover; The positioning component includes a positioning post and a protrusion. The protrusion is disposed adjacent to the long side of the cover. The positioning post is disposed between the through hole and the protrusion. The positioning post is used to insert into the connecting piece, and the protrusion is used to abut against the connecting piece.

2. The top cover according to claim 1, characterized in that, The end face of the protrusion and the end face of the pole extending out of the through hole are located on the same plane.

3. The top cover according to claim 1, characterized in that, The height of the positioning post is greater than the height of the protrusion.

4. A top cover module, characterized in that, include: Top cover as described in any one of claims 1-3; A pair of pole posts, each pole post passing through one of the through holes; Multiple connecting pieces, each connecting piece being connected to a set of positioning components, each connecting piece having a positioning hole, the positioning post of the positioning component passing through the positioning hole, the connecting piece abutting against the protrusion, and a portion of the connecting piece being welded to the pole post.

5. The top cover module according to claim 4, characterized in that, The connecting piece includes: a first body part and a second body part, the first body part is connected to the second body part, the first body part is provided with the positioning hole, a portion of the first body part is used for welding connection with the pole post, and a portion of the first body part abuts against the protrusion. The second body portion has a first position and a second position. Before the connecting piece is bent, the second body portion is in the first position and is located on the outside of the cover. After the connecting piece is bent, the second body portion is in the second position, and the second body portion is located on one side of the first body portion.

6. The top cover module according to claim 5, characterized in that, The connecting piece further includes a third body portion, through which the first body portion and the second body portion are connected; when the second body portion is in the first position, the third body portion is in a straight state, and when the second body portion is in the second position, the third body portion is in a bent state.

7. The top cover module according to claim 6, characterized in that, The third body portion is provided with multiple through slots along the length of the top cover, and the multiple through slots are configured to form a folded portion.

8. The top cover module according to claim 7, characterized in that, The through slots located at both ends of the third body portion are connected to the ends of the third body portion, forming notches.

9. The top cover module according to claim 5, characterized in that, The connecting piece further includes a fourth body portion, which is connected to the second body portion; When the second body portion is in the second position, the fourth body portion is opposite to the cover and is used to connect with the electrode tab.

10. A battery cell, characterized in that, include: A pole group, wherein the pole group is provided with multiple pole tabs; The top cover module according to any one of claims 4-9, wherein the connecting piece in the top cover module is connected to the electrode tab.

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