Cover plate assembly and battery cell having same

Abstract

The utility model provides a cover plate assembly and a battery monomer with the cover plate assembly. The cover plate assembly comprises a cover plate and a cover plate, the lower insulating part is arranged on one side of the cover plate in the thickness direction, one of the lower insulating part and the cover plate is provided with a limiting block, the other one of the lower insulating part and the cover plate is provided with a limiting hole, and the limiting block protrudes in the thickness direction of the cover plate; and the limiting block is matched in the limiting hole so as to fix the lower insulating part and the cover plate. According to the cover plate assembly provided by the utility model, the lower insulating part and the cover plate are fixed through the matching of the limiting block and the limiting hole, so that the assembly of the cover plate assembly can be facilitated, meanwhile, the assembly time of the cover plate assembly and the shell can be saved, and the assembly efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery monomer assembly manufacturing, in particular to a cover plate component and a battery monomer having the same. Background Art

[0002] In the existing solution, when the battery cell is assembled with the cover plate assembly, the lower insulating member is easy to move relative to the cover plate, which makes the assembly of the cover plate assembly difficult and is not conducive to improving the assembly efficiency of the cover plate assembly. 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 proposes a cover plate assembly, which can improve the assembly efficiency of the cover plate assembly.

[0004] The utility model also provides a battery monomer having the cover plate assembly.

[0005] According to the cover plate assembly of the embodiment of the utility model, the cover plate assembly includes: a cover plate; a lower insulating member, wherein the lower insulating member is arranged on one side of the cover plate in the thickness direction, one of the lower insulating member and the cover plate is provided with a limit block and the other is provided with a limit hole, the limit block protrudes along the thickness direction of the cover plate, and the limit block is engaged in the limit hole to fix the lower insulating member to the cover plate.

[0006] According to the cover plate assembly of the utility model, the lower insulating member is fixed to the cover plate by the cooperation of the limit block and the limit hole, which can facilitate the assembly of the cover plate assembly. At the same time, it can also save the assembly time of the cover plate assembly and the shell and improve the assembly efficiency.

[0007] According to some embodiments of the present invention, the limiting hole is formed on the cover plate, and the limiting block is formed on the lower insulating member and protrudes toward the cover plate.

[0008] According to some optional embodiments of the present invention, in the thickness direction of the cover plate, the protruding height of the limiting block is smaller than the depth of the limiting hole.

[0009] According to some embodiments of the present invention, the cross-section of the limiting hole is polygonal, oblong or elliptical, and the cross-section of the limiting block is adapted to the cross-section of the limiting hole.

[0010] According to some embodiments of the utility model, a boss portion protruding toward the lower insulating member is provided on the cover plate, and an injection hole is formed on the cover plate. The injection hole penetrates the boss portion along the thickness direction of the cover plate, and the distance between the end surface of the boss portion facing one end of the lower insulating member and the side surface of the cover plate facing the lower insulating member is 0.4mm-1.5mm.

[0011] According to some optional embodiments of the present invention, a groove is provided on one side surface of the cover plate facing the lower insulating member, and the groove extends in a ring shape along the circumference of the boss portion.

[0012] According to some optional embodiments of the present invention, in the thickness direction of the cover plate, the depth of the groove is 0.1mm-0.5mm; and / or, in the radial direction of the injection hole, the width of the groove is 0.6mm-2mm.

[0013] According to some embodiments of the utility model, the cover plate assembly includes: a sealing pin, which is arranged in the injection hole and sealed with the peripheral wall of the injection hole, and in the axial direction of the injection hole, the abutment length between the sealing pin and the peripheral wall of the injection hole is 0.5mm-3mm.

[0014] According to some embodiments of the utility model, the lower insulating member is provided with an avoidance hole which passes through the lower insulating member along the thickness direction of the cover plate, the boss portion is located in the avoidance hole, and the lower insulating member is provided with a plurality of reinforcing ribs, the plurality of reinforcing ribs are located in the avoidance hole and extend along the circumference of the boss portion, and in the circumferential direction of the boss portion, both ends of the reinforcing ribs are connected to the peripheral wall of the avoidance hole.

[0015] A battery cell according to an embodiment of the second aspect of the utility model comprises: a housing and a cover plate assembly according to the first aspect of the utility model.

[0016] According to the battery cell of the utility model, a cover plate assembly of the first embodiment is provided, and the lower insulating member is fixed to the cover plate by the cooperation of the limit block and the limit hole, which can facilitate the assembly of the cover plate assembly. At the same time, it can also save the assembly time of the cover plate assembly and the shell, and improve the assembly efficiency.

[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] Figure 1 is a schematic diagram of a cover plate assembly according to the utility model;

[0019] Figure 2 is along Figure 1 Sectional view along line AA;

[0020] Figure 3 is along Figure 1 Sectional view along the midline BB;

[0021] Figure 4 yes Figure 1 A schematic diagram of an angle of the cover plate and the pole shown in FIG.

[0022] Figure 5 yes Figure 1 A schematic diagram of another angle of the cover plate and the pole shown in FIG.

[0023] Figure 6 yes Figure 1 A schematic diagram of an angle of the lower insulating member shown in ;

[0024] Figure 7 yes Figure 1 A schematic diagram of another angle of the lower insulator shown in FIG.

[0025] Reference numerals:

[0026] 100. Cover plate assembly;

[0027] 10. Cover plate; 11. Boss portion; 111. Liquid injection hole; 12. Groove; 13. Limiting hole;

[0028] 20. Lower insulating member; 21. Limiting block; 22. Avoidance hole; 23. Reinforcing rib;

[0029] 30. Pole. DETAILED DESCRIPTION

[0030] 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 intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0031] Please refer to the following Figure 1-Figure 7 A cover plate assembly 100 according to an embodiment of the present invention is described.

[0032] Reference Figure 1 , Figure 3 , Figure 5 and Figure 6 According to the cover plate assembly 100 of the embodiment of the utility model, the cover plate assembly 100 includes: a cover plate 10 and a lower insulating member 20. Specifically, the lower insulating member 20 is arranged on the cover plate 10 in the thickness direction (such as Figure 1 In the up and down direction shown) on one side (such as Figure 1In the figure, the lower side of the cover plate 10 is shown, one of the lower insulating member 20 and the cover plate 10 is provided with a limit block 21 and the other is provided with a limit hole 13, that is, the lower insulating member 20 can be provided with a limit block 21 and the cover plate 10 is provided with a limit hole 13, or the cover plate 10 can be provided with a limit block 21 and the lower insulating member 20 is provided with a limit hole 13, the limit block 21 protrudes along the thickness direction of the cover plate 10, and the limit block 21 is matched in the limit hole 13 to fix the lower insulating member 20 to the cover plate 10.

[0033] For example, Figure 1 , Figure 3 , Figure 5 and Figure 6 As shown, the lower insulating member 20 is arranged on the lower side of the cover plate 10, and the limiting block 21 extends into the limiting hole 13 to fix the lower insulating member 20 to the cover plate 10. Preferably, the cover plate 10 is a plain aluminum sheet, which can ensure the strength of the cover plate 10, and the lower insulating member 20 is a lower plastic, which can ensure the insulation effect of the lower insulating member 20.

[0034] The cover assembly 100 of the utility model fixes the lower insulating member 20 and the cover plate 10 by the cooperation of the limit block 21 and the limit hole 13. When the cover assembly 100 is assembled to the shell, the lower insulating member 20 can be effectively prevented from moving relative to the cover plate 10, thereby facilitating the assembly of the cover assembly 100. At the same time, the lower insulating member 20 and the cover plate 10 are fixed, and there is no need to adjust the relative position of the lower insulating member 20 and the cover plate 10, thereby saving the assembly time of the cover assembly 100 and the shell, and improving the assembly efficiency.

[0035] According to the cover plate assembly 100 of the embodiment of the utility model, the lower insulating member 20 is fixed to the cover plate 10 by the cooperation of the limit block 21 and the limit hole 13, which can facilitate the assembly of the cover plate assembly 100. At the same time, it can also save the assembly time of the cover plate assembly 100 and the shell, thereby improving the assembly efficiency.

[0036] According to some embodiments of the present invention, referring to Figure 1 , Figure 5 and Figure 6 The limiting hole 13 is formed on the cover plate 10, and the limiting block 21 is formed on the lower insulating member 20 and protrudes toward the cover plate 10. Therefore, the limiting hole 13 is provided on the cover plate 10, and the limiting block 21 is provided on the lower insulating member 20. This structural arrangement is reasonable and convenient for the matching of the limiting block 21 and the limiting hole 13.

[0037] For example, Figure 1 , Figure 5 and Figure 6 As shown, a limiting hole 13 is formed on the cover plate 10 , and the limiting hole 13 passes through the cover plate 10 in the up-down direction. A limiting block 21 protruding upward is formed on the upper surface of the lower insulating member 20 .

[0038] According to some optional embodiments of the present invention, referring to Figure 1 , Figure 5 and Figure 6 , in the thickness direction of the cover plate 10 (eg Figure 1 The protruding height of the stopper 21 is less than the depth of the stopper hole 13. Thus, the stopper 21 can be prevented from protruding to the surface of the cover plate 10, thereby facilitating the assembly of the cover plate assembly 100 and improving the aesthetics of the cover plate assembly 100.

[0039] For example, Figure 1 , Figure 5 and Figure 6 As shown, the depth of the limiting hole 13 is h1, the protruding height of the limiting block 21 is h2, and the depth h1 of the limiting hole 13 and the protruding height h2 of the limiting block 21 satisfy: h1≧h2+0.2mm.

[0040] According to some embodiments of the present invention, referring to Figure 1 , Figure 5 and Figure 6 The cross section of the limiting hole 13 is polygonal, oblong or elliptical. Therefore, the cross section of the limiting hole 13 can be in various forms, which can facilitate the arrangement of the limiting hole 13. The cross section of the limiting block 21 is adapted to the cross section of the limiting hole 13. In this way, the limiting block 21 can be prevented from rotating in the limiting hole 13, thereby achieving the fixation of the lower insulating member 20 and the cover plate assembly 100.

[0041] For example, Figure 1 , Figure 5 and Figure 6 As shown, the cross section of the limiting hole 13 can be triangular, rectangular or waist-shaped, and the cross section of the limiting block 21 is the same as the cross section of the limiting hole 13 .

[0042] According to some optional embodiments of the present invention, referring to Figure 1 , Figure 2 and Figure 5 The cover plate 10 is provided with a boss portion 11 protruding toward the lower insulating member 20, and a liquid injection hole 111 is formed on the cover plate 10. The liquid injection hole 111 is formed along the thickness direction of the cover plate 10 (such as Figure 2 The upper and lower directions shown in FIG. 1 ) pass through the boss portion 11, and one end of the boss portion 11 facing the lower insulating member 20 (as shown in FIG. Figure 2 The end surface of the boss portion 11 shown in the figure is connected to the side surface of the cover plate 10 facing the lower insulating member 20 (as shown in the figure). Figure 2 The spacing between the lower surface of the cover plate 10 shown is 0.4mm-1.5mm.

[0043] In this way, the boss portion 11 can provide a layout position for the injection hole 111, thereby facilitating the layout of the injection hole 111. At the same time, one end of the boss portion 11 protrudes from one side surface of the cover plate 10, so that the injection hole 111 can be closer to the interior of the shell, thereby facilitating the injection of liquid into the shell.

[0044] For example, Figure 1 , Figure 2 and Figure 5 As shown, Figure 2 Where a represents the distance between the end surface of the boss portion 11 facing the lower insulating member 20 and the side surface of the cover plate 10 facing the lower insulating member 20, and a can be: 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm or 1.5mm.

[0045] According to some optional embodiments of the present invention, referring to Figure 2 and Figure 5 The surface of the cover plate 10 facing the lower insulating member 20 (eg Figure 5 The lower surface of the cover plate 10 shown in the figure is provided with a groove 12, and the groove 12 extends in a ring shape along the circumference of the boss portion 11. Thus, the groove 12 separates the boss portion 11 from the surrounding of the boss portion 11, so that the molding of the boss portion 11 can be facilitated.

[0046] According to some optional embodiments of the present invention, referring to Figure 2 , Figure 4 and Figure 5 , in the thickness direction of the cover plate 10 (eg Figure 4 In the vertical direction of the cover plate 10 shown in FIG. 1 , the depth of the groove 12 is 0.1 mm to 0.5 mm. Thus, the molding of the boss portion 11 can be further facilitated.

[0047] For example, Figure 2 , Figure 4 and Figure 5 As shown, Figure 2 The b in the figure represents the depth of the groove 12, and b can be: 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm or 0.5 mm.

[0048] Furthermore, if Figure 2 , Figure 4 and Figure 5 As shown, the width of the groove 12 is 0.6 mm to 2 mm in the radial direction of the injection hole 111. Thus, the separation distance between the boss portion 11 and the surroundings of the boss portion 11 can be ensured, so that the molding of the boss portion 11 can be facilitated.

[0049] For example, Figure 2 , Figure 4 and Figure 5 As shown, Figure 2 Here, c represents the width of the groove 12, and c may be: 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm or 2 mm.

[0050] According to some embodiments of the present invention, referring to Figure 1 and Figure 2 The cover plate assembly 100 includes: a sealing pin, which is arranged in the injection hole 111 and is sealed to the peripheral wall of the injection hole 111, and is axially connected to the injection hole 111 (such as Figure 1 In the vertical direction of the injection hole 111 shown in FIG. 1 , the contact length between the sealing nail and the peripheral wall of the injection hole 111 is 0.5 mm to 3 mm. Thus, the sealing nail can close the injection hole 111, thereby preventing the liquid in the housing from flowing out of the injection hole 111. At the same time, the contact length between the sealing nail and the injection hole 111 is limited, which can ensure the sealing effect of the sealing nail on the injection hole 111.

[0051] For example, Figure 1 and Figure 2 As shown, the contact length between the sealing pin and the peripheral wall of the injection hole 111 can be: 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm or 3mm.

[0052] According to some embodiments of the present invention, referring to Figure 1 , Figure 5 and Figure 7 The lower insulating member 20 is provided with a thickness direction of the cover plate 10 (such as Figure 4 The cover plate 10 shown in the figure (in the up and down direction) passes through the avoidance hole 22 of the lower insulating member 20, and the boss portion 11 is located in the avoidance hole 22. Therefore, the avoidance hole 22 provides an avoidance position for the boss portion 11, which facilitates the boss portion 11 to pass through the lower insulating member 20.

[0053] Furthermore, if Figure 1 , Figure 5 and Figure 7 As shown, the lower insulating member 20 is provided with a plurality of reinforcing ribs 23, which are located in the avoidance hole 22 and extend along the circumference of the boss portion 11. In the circumferential direction of the boss portion 11, both ends of the reinforcing ribs 23 are connected to the peripheral wall of the avoidance hole 22. Thus, the reinforcing ribs 23 can strengthen the strength around the avoidance hole 22 of the lower insulating member 20, and when the cover plate 10 and the lower insulating member 20 are assembled, the deformation around the avoidance hole 22 can be effectively prevented. Furthermore, both ends of the reinforcing ribs 23 are connected to the hole wall of the avoidance hole 22, so that the connection strength between the reinforcing ribs 23 and the hole wall of the avoidance hole 22 can be ensured.

[0054] For example, Figure 1 , Figure 5 and Figure 7 As shown, the avoidance hole 22 passes through the lower insulating member 20 in the up-down direction, and a reinforcing rib 23 is provided around the avoidance hole 22 . Both ends of the reinforcing rib 23 are connected to the hole wall of the avoidance hole 22 . Four reinforcing ribs 23 are provided, and the four reinforcing ribs 23 form a diamond structure around the boss portion 11 .

[0055] According to some embodiments of the present invention, referring to Figure 1 and Figure 4 The cover plate assembly 100 includes: a pole 30, and the pole 30 is connected to the structure inside the shell, so that the battery cell can be charged and discharged through the pole 30 inside the battery cell.

[0056] According to the battery cell of the second embodiment of the utility model, Figure 1 and Figures, including: a shell and a cover plate assembly 100 of the first aspect of this embodiment.

[0057] According to the battery cell of the embodiment of the utility model, the cover plate assembly 100 of the above-mentioned first aspect embodiment is set, and the lower insulating member 20 and the cover plate 10 are fixed by the cooperation of the limit block 21 and the limit hole 13, which can facilitate the assembly of the cover plate assembly 100. At the same time, it can also save the assembly time of the cover plate assembly 100 and improve the assembly efficiency.

[0058] Reference below Figure 1-Figure 7 A battery cell according to an embodiment of the present invention is described.

[0059] According to the battery cell of the embodiment of the utility model, Figure 1 The battery cell includes: a shell and a cover plate assembly 100, and the cover plate assembly 100 is covered on one side of the shell.

[0060] The cover plate assembly 100 includes: a cover plate 10, a lower insulating member 20, a sealing nail and a pole 30. The lower insulating member 20 is arranged on the lower side of the cover plate 10, and a stopper 21 protruding upward is formed on the upper side surface of the lower insulating member 20. The lower insulating member 20 is provided with an avoidance hole 22 penetrating the lower insulating member 20 in the up-down direction, and the lower insulating member 20 is provided with four reinforcing ribs 23. The four reinforcing ribs 23 are located in the avoidance hole 22 and are arranged at intervals along the circumference of the avoidance hole 22, and both ends of the reinforcing ribs 23 are connected to the peripheral wall of the avoidance hole 22.

[0061] A limiting hole 13 is formed on the cover plate 10, and the limiting hole 13 penetrates the cover plate 10 in the up-down direction, and the cross section of the limiting hole 13 matches the cross section of the limiting block 21. A boss portion 11 protruding downward is formed on the lower side surface of the cover plate 10, and a liquid injection hole 111 penetrates the boss portion 11 in the up-down direction, and an annular groove 12 is provided around the boss portion 11. A sealing nail is arranged in the liquid injection hole 111 and is sealed and connected to the peripheral wall of the liquid injection hole 111, and the pole 30 is fixed on the cover plate 10.

[0062] When assembling the battery cell, first install the cover plate 10 on the upper side of the lower insulating member 20. Note that the limit block 21 fits in the limit hole 13 and the boss portion 11 extends into the avoidance hole 22. Then, assemble the cover plate assembly 100 with the shell. At this point, the assembly of the battery cell is completed.

[0063] The battery cell of the utility model is provided with the cover plate assembly 100 of the first embodiment mentioned above, and the lower insulating member 20 is fixed to the cover plate 10 by the cooperation of the limit block 21 and the limit hole 13, so that the assembly of the cover plate assembly 100 can be facilitated. At the same time, the assembly time of the cover plate assembly 100 and the shell can be saved, thereby improving the assembly efficiency.

[0064] In the description of the present invention, it should be understood 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 orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0065] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0066] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like 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, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0067] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. 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 representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0068] 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 cover plate assembly, characterized in that: include: Cover plate; A lower insulating member, wherein the lower insulating member is arranged on one side of the cover plate in the thickness direction, one of the lower insulating member and the cover plate is provided with a limit block and the other is provided with a limit hole, the limit block protrudes along the thickness direction of the cover plate, and the limit block is matched in the limit hole to fix the lower insulating member to the cover plate.

2. The cover plate assembly according to claim 1, characterized in that: The limiting hole is formed on the cover plate, and the limiting block is formed on the lower insulating member and protrudes toward the cover plate.

3. The cover plate assembly according to claim 2, characterized in that: In the thickness direction of the cover plate, the protruding height of the limiting block is smaller than the depth of the limiting hole.

4. The cover plate assembly according to claim 2, characterized in that: The cross section of the limiting hole is polygonal, oblong or elliptical, and the cross section of the limiting block is adapted to the cross section of the limiting hole.

5. The cover plate assembly according to claim 1, characterized in that: The cover plate is provided with a boss portion protruding toward the lower insulating member, and an injection hole is formed on the cover plate. The injection hole penetrates the boss portion along the thickness direction of the cover plate, and the spacing between the end surface of the boss portion facing one end of the lower insulating member and the side surface of the cover plate facing the lower insulating member is 0.4mm-1.5mm.

6. The cover plate assembly according to claim 5, characterized in that: A groove is provided on a surface of one side of the cover plate facing the lower insulating member, and the groove extends in a ring shape along the circumference of the boss portion.

7. The cover plate assembly according to claim 6, characterized in that: In the thickness direction of the cover plate, the depth of the groove is 0.1 mm-0.5 mm; and / or, In the radial direction of the injection hole, the width of the groove is 0.6mm-2mm.

8. The cover plate assembly according to claim 5, characterized in that: include: A sealing pin is arranged in the injection hole and is sealed with the peripheral wall of the injection hole. In the axial direction of the injection hole, the contact length between the sealing pin and the peripheral wall of the injection hole is 0.5mm-3mm.

9. The cover plate assembly according to claim 5, characterized in that: The lower insulating member is provided with an escape hole which penetrates the lower insulating member along the thickness direction of the cover plate, and the boss portion is located in the escape hole. The lower insulating member is provided with a plurality of reinforcing ribs, which are located in the avoidance hole and extend along the circumference of the boss portion. In the circumferential direction of the boss portion, both ends of the reinforcing ribs are connected to the peripheral wall of the avoidance hole.

10. A battery cell, characterized in that: include: A housing and a cover plate assembly according to any one of claims 1-9.

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