Top cover assembly and battery monomer

Abstract

The utility model discloses a top cover assembly and a battery monomer, the top cover assembly is used for the battery monomer and comprises a cover body, a first mounting hole, a second mounting hole and a top cover, the cover body is provided with a first mounting hole, and the first mounting hole penetrates through the cover body in the thickness direction of the cover body; the pole is arranged in the first mounting hole in a penetrating manner; the riveting block is arranged on the pole in a sleeving manner and connected with the pole, and the riveting block is positioned on one side, deviating from the pole group of the single battery, of the cover body; and the protection sheet covers one end, deviating from the pole group, of the pole column. According to the top cover assembly disclosed by the utility model, the end, deviating from the pole group, of the pole column is covered by the protective sheet, so that the pole column is prevented from being exposed in an external environment, and the oxidation of the pole column in a high-temperature baking process or a battery monomer use process is reduced, thereby reducing the influence of the oxidation of the pole column on the capacity and the service life of the battery monomer; and the reliability of the battery monomer applying the top cover assembly is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a top cover assembly and a battery monomer. Background Art

[0002] High temperature baking is an important step in the manufacturing process of battery cells, which is usually carried out after the battery cells are assembled. However, in the prior art, high temperature baking will accelerate the oxidation of the poles, thereby reducing the capacity and service life of the battery cells. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a top cover assembly, which reduces the oxidation of the pole during high-temperature baking or during the use of the battery cell, thereby alleviating the impact of the oxidation of the pole on the capacity and service life of the battery cell.

[0004] The utility model also provides a battery cell, which includes the above-mentioned top cover assembly.

[0005] According to the embodiment of the utility model, the top cover assembly is used for a battery cell and includes: a cover body, the cover body having a first mounting hole penetrating the cover body in the thickness direction of the cover body; a pole, the pole is inserted into the first mounting hole; a rivet block, the rivet block is sleeved on the pole and connected to the pole, the rivet block is located on the side of the cover body away from the pole group of the battery cell; and a protective sheet, the protective sheet covers the end of the pole away from the pole group.

[0006] According to the top cover assembly of the embodiment of the utility model, the cover body has a first mounting hole that penetrates the cover body in the thickness direction of the cover body, the pole is inserted into the first mounting hole, the rivet block is sleeved on the pole and connected to the pole, the rivet block is located on the side of the cover body away from the pole group of the battery cell, and the end of the pole away from the pole group is covered by a protective sheet to avoid exposure of the pole to the external environment, reduce oxidation of the pole during high-temperature baking or use of the battery cell, thereby reducing the influence of pole oxidation on the capacity and service life of the battery cell, and improving the reliability of the battery cell using the top cover assembly.

[0007] In some embodiments of the utility model, the rivet block has a mounting groove, the mounting groove is open at one end away from the pole group, the bottom wall of the mounting groove forms a second mounting hole arranged opposite to the first mounting hole, the pole is passed through the first mounting hole and the second mounting hole, and the protective sheet is located in the mounting groove and connected to the rivet block.

[0008] In some embodiments of the present invention, along the thickness direction of the cover body, the thickness of the mounting groove is H, the thickness of the protection sheet is h, and the following condition is satisfied: 0<h≤H.

[0009] In some embodiments of the present invention, in a cross section perpendicular to the thickness direction of the cover body, the protective sheet is circular with a diameter of a, the mounting groove is circular with a diameter of b, and the following condition is satisfied: a<b.

[0010] In some embodiments of the present invention, the protective sheet is a transparent piece.

[0011] In some embodiments of the present invention, the protective sheet is a PET piece.

[0012] In some embodiments of the present invention, it also includes: an upper plastic, which is arranged between the cover body and the rivet block, and has a third mounting hole arranged opposite to the first mounting hole; a lower plastic, which is arranged between the cover body and the pole group, and has a fourth mounting hole arranged opposite to the first mounting hole, and the pole is sequentially penetrated into the fourth mounting hole, the first mounting hole and the third mounting hole.

[0013] Some embodiments of the present invention further include: a sealing ring, which is sleeved on the outer peripheral wall of the pole and is located between the pole and the lower plastic and between the pole and the cover body.

[0014] In some embodiments of the present invention, the pole includes: a pole body, which is inserted into the first mounting hole and connected to the rivet block; and a bottom plate, which is located between the pole body and the pole group and connected to the pole body.

[0015] A battery cell according to an embodiment of the present invention includes the above-mentioned top cover assembly.

[0016] According to the battery cell of the embodiment of the utility model, a top cover assembly is provided, and a first mounting hole is provided on the cover body which penetrates the cover body in the thickness direction of the cover body, and the pole is inserted into the first mounting hole, and a rivet block is sleeved on the pole and connected to the pole, and the rivet block is located on the side of the cover body which is away from the pole group of the battery cell, and a protective sheet is used to cover the end of the pole away from the pole group to avoid exposure of the pole to the external environment, reduce oxidation of the pole during high-temperature baking or during use of the battery cell, thereby slowing down the influence of oxidation of the pole on the capacity and service life of the battery cell, and improving the reliability of the battery cell.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 is a three-dimensional diagram of a top cover assembly according to an embodiment of the utility model;

[0020] Figure 2 is an exploded view of a top cover assembly according to an embodiment of the utility model;

[0021] Figure 3 is a top view of a top cover assembly according to an embodiment of the utility model;

[0022] Figure 4 is along Figure 3 Sectional view of the mid-CC line;

[0023] Figure 5 yes Figure 4 Enlarged view of point D in the middle.

[0024] Reference numerals:

[0025] 100. Top cover assembly;

[0026] 1. Cover body; 11. First mounting hole;

[0027] 2. Pole; 21. Pole body; 22. Bottom plate;

[0028] 3. Riveting block; 31. Mounting slot; 32. Second mounting hole;

[0029] 4. Protective sheet;

[0030] 5. Put on plastic; 51. The third mounting hole;

[0031] 6. Lower plastic; 61. Fourth mounting hole;

[0032] 7. Sealing ring. DETAILED DESCRIPTION

[0033] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0034] In the description of the present utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] The top cover assembly 100 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0037] like Figure 1-Figure 5 As shown, the top cover assembly 100 according to the embodiment of the present invention is used for a battery cell, and the top cover assembly 100 includes a cover body 1, a pole 2, a riveting block 3 and a protective sheet 4.

[0038] The cover body 1 has a thickness direction (such as Figure 1 and Figure 5 The first mounting hole 11 of the cover body 1 is penetrated in the first mounting hole 11, the pole 2 is inserted into the first mounting hole 11, the rivet block 3 is sleeved on the pole 2 and connected to the pole 2, and the rivet block 3 is located on the side of the cover body 1 away from the pole group of the battery cell.

[0039] It can be understood that the pole 2 can connect the internal and external circuits of the battery, and transmit the current inside the battery to the outside of the battery. The pole 2 is inserted into the first mounting hole 11 and connected to the riveted block 3, and the internal current of the battery cell can be connected to the external riveted block 3 through the pole 2, so that the riveted block 3 plays a guiding role. At the same time, the assembly of the cover body 1, the pole 2 and the riveted block 3 is realized by inserting the pole 2 into the first mounting hole 11 and connecting to the riveted block 3.

[0040] Since the end of the pole 2 away from the pole group is exposed to the external environment after the top cover assembly 100 is assembled, the protective sheet 4 is provided to cover the end of the pole 2 away from the pole group to avoid the pole 2 from being exposed to the external environment, and the oxidation of the pole 2 during high-temperature baking or the use of the battery cell is reduced, thereby alleviating the impact of the oxidation of the pole 2 on the capacity and service life of the battery cell, and improving the reliability of the battery cell using the top cover assembly 100.

[0041] Optionally, the cover body 1 is a plain aluminum sheet.

[0042] Furthermore, the pole 2 is a copper piece. Therefore, the protective sheet 4 slows down the oxidation of the pole 2, causing the oxidized part of the pole 2 to turn red and black, thereby improving the aesthetics of the battery cell.

[0043] According to the top cover assembly 100 of the embodiment of the utility model, the cover body 1 has a first mounting hole 11 that penetrates the cover body 1 in the thickness direction of the cover body 1, the pole 2 is inserted into the first mounting hole 11, the rivet block 3 is sleeved on the pole 2 and connected to the pole 2, the rivet block 3 is located on the side of the cover body 1 that is away from the pole group of the battery cell, and the end of the pole 2 that is away from the pole group is covered by the protective sheet 4 to avoid the pole 2 from being exposed to the external environment, reduce the oxidation of the pole 2 during high-temperature baking or the use of the battery cell, thereby reducing the influence of the oxidation of the pole 2 on the capacity and service life of the battery cell, and improve the reliability of the battery cell using the top cover assembly 100.

[0044] In some embodiments of the present invention, Figure 5 As shown, the riveting block 3 has a mounting groove 31, the end of the mounting groove 31 away from the pole group is open, the bottom wall of the mounting groove 31 forms a second mounting hole 32 arranged opposite to the first mounting hole 11, the pole 2 is inserted into the first mounting hole 11 and the second mounting hole 32, and the protective sheet 4 is located in the mounting groove 31 and connected to the riveting block 3.

[0045] Therefore, the protective sheet 4 is located in the installation groove 31 and connected to the rivet block 3, so that the protective sheet 4 isolates the pole 2 from contact with oxygen, thereby effectively avoiding the influence of oxidation of the pole 2 on the capacity and service life of the battery cell, and further improving the reliability of the battery cell using the top cover assembly 100. The protective sheet 4 is located in the installation groove 31 and connected to the rivet block 3, and its stability and firmness are guaranteed while realizing the connection of the protective sheet 4, further ensuring that the protective sheet 4 can isolate the pole 2 from contact with oxygen.

[0046] At the same time, a second mounting hole 32 arranged opposite to the first mounting hole 11 is formed through the bottom wall of the mounting groove 31, and the pole 2 is inserted into the first mounting hole 11 and the second mounting hole 32, which facilitates the connection between the pole 2 and the riveting block 3, further improving the reliability of the top cover assembly 100.

[0047] In some embodiments of the present invention, Figure 5 As shown, along the thickness direction of the cover body 1, the thickness of the mounting groove 31 is H, the thickness of the protective sheet 4 is h, and they satisfy: 0<h≤H. It can be understood that when h<H is satisfied, the surface of the protective sheet 4 that is away from the pole group is located below the surface of the cover body 1 that is away from the pole group, and when h=H is satisfied, the surface of the protective sheet 4 that is away from the pole group is located flush with the surface of the cover body 1 that is away from the pole group, thereby further improving the reliability of the top cover assembly 100 through such an arrangement.

[0048] In some embodiments of the present invention, Figure 3 As shown, in a cross section perpendicular to the thickness direction of the cover body 1, the protective sheet 4 is circular with a diameter of a, the mounting groove 31 is circular with a diameter of b, and satisfies: a<b. Thus, by such a setting, the protective sheet 4 can be located in the mounting groove 31 and connected to the riveting block 3, thereby ensuring the reliability of the top cover assembly 100 and reducing the difficulty of assembly.

[0049] Furthermore, the outer edge of the protection sheet 4 is bonded and connected to the mounting groove 31. Thus, the protection sheet 4 is connected to the mounting groove 31 through such an arrangement, and the difficulty of assembly is reduced.

[0050] In some embodiments of the utility model, the protective sheet 4 is a transparent piece. Therefore, in the process of assembling the protective sheet 4 by the top cover assembly 100 through the CCD (Charge Coupled Device) camera, the protective sheet 4 is a transparent piece, which facilitates the positioning of the protective sheet 4, so that the protective sheet 4 effectively isolates the pole 2 from oxygen and reduces the difficulty of assembly.

[0051] In some embodiments of the present invention, the protective sheet 4 is a PET (polyethylene glycolterephthalate) piece. Thus, the protective sheet 4 has a certain high temperature resistance through such a configuration, so that the stability of the protective sheet 4 can be ensured during the high temperature baking of the battery cell, thereby ensuring that the protective sheet 4 effectively isolates the pole 2 from oxygen.

[0052] In some embodiments of the present invention, Figure 2 and Figure 5 As shown, the top cover assembly 100 further includes an upper plastic 5 and a lower plastic 6. The upper plastic 5 is disposed between the cover body 1 and the riveting block 3, and has a third mounting hole 51 disposed opposite to the first mounting hole 11; the lower plastic 6 is disposed between the cover body 1 and the pole group, and has a fourth mounting hole 61 disposed opposite to the first mounting hole 11; the pole 2 is sequentially penetrated in the fourth mounting hole 61, the first mounting hole 11 and the third mounting hole 51.

[0053] Thus, the reliability of the battery cell is ensured by the insulation effect of the upper plastic 5 and the lower plastic 6. At the same time, the upper plastic 5 enhances the sealing between the cover body 1 and the riveting block 3, and the lower plastic 6 enhances the sealing between the electrode group and the top cover assembly 100, thereby preventing external dust, moisture and other impurities from entering the interior of the battery cell from the top cover assembly 100, ensuring the safety and stability of the battery cell.

[0054] In some embodiments of the present invention, Figure 2 and Figure 5 As shown, the top cover assembly 100 further includes a sealing ring 7, which is sleeved on the outer peripheral wall of the pole 2 and is located between the pole 2 and the lower plastic 6 and between the pole 2 and the cover body 1. Thus, the sealing between the pole 2 and the lower plastic 6 and between the pole 2 and the cover body 1 is further strengthened by the sealing ring 7, so as to further seal the interior of the battery cell, prevent leakage from the interior of the battery cell, and extend the service life of the battery.

[0055] In some embodiments of the present invention, Figure 2 As shown, the pole 2 includes a pole body 21 and a bottom plate 22, the pole body 21 is inserted into the first mounting hole 11 and connected to the riveting block 3, and the bottom plate 22 is located between the pole body 21 and the pole group and connected to the pole body 21. It can be understood that the bottom plate 22 is connected to the pole group to achieve indirect connection between the pole body 21 and the pole group, so that the internal current of the battery cell is transmitted to the external riveting block 3 through the pole 2, so that the riveting block 3 plays a role in guiding current and improving the reliability of the battery cell.

[0056] The battery cell of the embodiment of the present utility model is described below.

[0057] The battery cell according to the embodiment of the present invention includes a top cover assembly 100 .

[0058] According to the battery cell of the embodiment of the utility model, a top cover assembly 100 is provided, and a first mounting hole 11 is provided on the cover body 1, which penetrates the cover body 1 in the thickness direction of the cover body 1, and the pole 2 is inserted into the first mounting hole 11. The rivet block 3 is sleeved on the pole 2 and connected to the pole 2. The rivet block 3 is located on the side of the cover body 1 away from the pole group of the battery cell, and the end of the pole 2 away from the pole group is covered by the protective sheet 4 to avoid the pole 2 from being exposed to the external environment, reduce the oxidation of the pole 2 during high-temperature baking or during the use of the battery cell, thereby slowing down the influence of the oxidation of the pole 2 on the capacity and service life of the battery cell, and improving the reliability of the battery cell.

[0059] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0060] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A top cover assembly for a battery cell, characterized in that: include: A cover body, wherein the cover body has a first mounting hole penetrating the cover body in a thickness direction of the cover body; A pole, the pole being inserted into the first mounting hole; A riveting block, which is sleeved on the pole and connected to the pole, and is located on a side of the cover body away from the pole group of the battery cell; A protective sheet covers an end of the pole away from the pole group.

2. The top cover assembly according to claim 1, characterized in that: The rivet block has a mounting groove, which is open at one end away from the pole group, and the bottom wall of the mounting groove forms a second mounting hole arranged opposite to the first mounting hole. The pole is inserted into the first mounting hole and the second mounting hole, and the protective sheet is located in the mounting groove and connected to the rivet block.

3. The top cover assembly according to claim 2, characterized in that: Along the thickness direction of the cover body, the thickness of the mounting groove is H, the thickness of the protection sheet is h, and the following relationship is satisfied: 0<h≤H.

4. The top cover assembly according to claim 2, characterized in that: In a cross section perpendicular to the thickness direction of the cover body, the protective sheet is circular with a diameter of a, the mounting groove is circular with a diameter of b, and the following relationship is satisfied: a<b.

5. The top cover assembly according to claim 1, characterized in that: The protective sheet is a transparent piece.

6. The top cover assembly according to claim 1, characterized in that: The protective sheet is a PET piece.

7. The top cover assembly according to claim 1, characterized in that: Also includes: An upper plastic, the upper plastic being arranged between the cover body and the riveting block, the upper plastic having a third mounting hole arranged opposite to the first mounting hole; The lower plastic is arranged between the cover body and the pole group, and the lower plastic has a fourth mounting hole arranged opposite to the first mounting hole, and the pole is sequentially penetrated into the fourth mounting hole, the first mounting hole and the third mounting hole.

8. The top cover assembly according to claim 7, characterized in that: Also includes: A sealing ring is sleeved on the outer peripheral wall of the pole and is located between the pole and the lower plastic and between the pole and the cover body.

9. The top cover assembly according to claim 1, characterized in that: The pole comprises: A pole body, the pole body is inserted into the first mounting hole and connected to the riveting block; A bottom plate is located between the pole body and the pole group and is connected to the pole body.

10. A battery cell, characterized in that: Comprising a top cover assembly according to any one of claims 1-9.

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