Battery cover plate assembly and battery

Abstract

The utility model discloses a battery cover plate assembly and a battery, the battery cover plate assembly comprises a cover plate, lower plastic cement and an end plate, the lower plastic cement is arranged on one side of the cover plate; the end plate is installed on the side, away from the cover plate, of the lower plastic, connecting columns are arranged on the surface, facing the end plate, of the lower plastic, and inserting grooves matched with the connecting columns in an inserted mode are formed in the end plate. According to the battery cover plate assembly disclosed by the embodiment of the utility model, the connecting column is arranged on the surface, facing the end plate, of the lower plastic, and the inserting groove matched with the connecting column in an inserting manner is formed in the end plate, so that the matching between the lower plastic and the end plate can be facilitated, the relative position of the lower plastic and the end plate is not easy to change after the lower plastic and the end plate are assembled, and the tab is not easy to damage; therefore, the battery is not easy to be in short circuit with the shell due to tearing of the tabs, and the safety is good.

Description

Technical Field

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

[0002] As lithium-ion battery technology becomes increasingly mature, lithium-ion batteries are widely used as power batteries in electric vehicles and energy storage fields, and the requirements for the performance and safety of lithium-ion batteries are increasing.

[0003] However, in the lithium-ion battery of the related art, the end plate is in contact with the lower plastic surface, and due to the assembly gap between the electrode group and the shell, it is easy to shift, thereby easily tearing the pole ear, and the torn pole ear is easy to overlap on the metal shell, thus causing safety problems. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a battery cover assembly, which can better protect the tabs and has good safety.

[0005] According to an embodiment of the utility model, the battery cover plate assembly includes: a cover plate; a lower plastic, wherein the lower plastic is installed on one side of the cover plate; and an end plate, wherein the end plate is installed on the side of the lower plastic away from the cover plate, wherein a connecting column is provided on the surface of the lower plastic facing the end plate, and a slot is provided on the end plate to be plugged into and cooperate with the connecting column.

[0006] According to the battery cover assembly of the embodiment of the utility model, a connecting column is arranged on the surface of the lower plastic facing the end plate, and a slot is arranged on the end plate to be plugged with the connecting column, which can facilitate the cooperation between the lower plastic and the end plate, and the relative position of the lower plastic and the end plate is not easy to change after assembly, which can make the pole ear not easy to be damaged, so that the battery is not easy to be short-circuited with the shell due to the tearing of the pole ear, and the safety is good.

[0007] In addition, the battery cover assembly according to the utility model may also have the following additional technical features:

[0008] In some embodiments of the present invention, a first anti-slip structure is provided on the connecting column, and / or a second anti-slip structure is provided on the slot.

[0009] In some embodiments of the present invention, the connecting column is a cylinder.

[0010] In some embodiments of the present invention, the end plate has a groove opening toward the lower plastic, and the lower plastic is located in the groove, wherein the cover plate abuts the end plate, and the outer periphery of the lower plastic abuts the inner wall of the groove.

[0011] In some embodiments of the present invention, a bottom wall of the groove is provided with an inserting column extending toward the lower plastic, and the inserting column has the slot therein.

[0012] In some embodiments of the present invention, the spacing distance L between the plug-in column and the lower plastic meets the following condition: 2mm≤L≤5mm.

[0013] In some embodiments of the present invention, two connecting posts are provided, and the two connecting posts are respectively located at two ends of the length direction of the lower plastic, and two slots are provided, and the two connecting posts correspond to the two slots one by one.

[0014] In some embodiments of the present invention, a guiding slope is provided at the end of the connecting column and / or the opening of the slot.

[0015] In some embodiments of the present invention, the lower plastic and the connecting column are an integrated part formed in one piece.

[0016] The utility model also provides a battery having the battery cover assembly of the above embodiment.

[0017] According to the battery of the embodiment of the utility model, by providing the battery cover assembly of the above embodiment, it can be beneficial to the cooperation between the lower plastic and the end plate, and the relative position of the lower plastic and the end plate is not easy to change after assembly, which can make the pole ear not easy to be damaged, so that the battery is not easy to short-circuit with the shell due to the tearing of the pole ear, and the safety is good.

[0018] 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

[0019] 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:

[0020] Figure 1 It is a structural schematic diagram of a battery cover assembly according to an embodiment of the utility model.

[0021] Figure 2 yes Figure 1 Sectional view along line AA.

[0022] Figure 3 It is an exploded view of a battery cover assembly according to an embodiment of the utility model.

[0023] Figure 4 It is a structural schematic diagram of the end plate of the battery cover assembly according to an embodiment of the utility model.

[0024] Figure 5 yes Figure 4 Sectional view along line BB.

[0025] Reference numerals:

[0026] Battery cover assembly 100,

[0027] Cover plate 1, pole 11,

[0028] Lower plastic 2, connecting column 21, first anti-slip structure 211,

[0029] End plate 3, plug-in column 30, slot 31, partition plate 32, and receiving groove 33. 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 only used to explain the present invention, and cannot be understood as limiting the present invention.

[0031] In the description of the present utility model, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions 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 direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. 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 "multiple" is two or more, unless otherwise clearly and specifically defined.

[0032] In the description of the present utility model, 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 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 utility model can be understood according to specific circumstances.

[0033] Reference below Figure 1-Figure 5 A battery cover assembly 100 according to an embodiment of the present invention is described.

[0034] like Figure 1-Figure 5 As shown, the battery cover assembly 100 according to the embodiment of the utility model includes a cover 1, a lower plastic 2 and an end plate 3, the lower plastic 2 is installed on one side of the cover 1, and the end plate 3 is installed on the side of the lower plastic 2 away from the cover 1, wherein a connecting column 21 is provided on the surface of the lower plastic 2 facing the end plate 3, and a slot 31 is provided on the end plate 3 to be plugged with the connecting column 21.

[0035] In a specific example, the battery includes a shell and an electrode assembly, the electrode assembly is installed in the shell, the shell includes a shell body and a battery cover assembly 100, and the battery cover assembly 100 is covered on the shell body to enclose the electrode assembly in the shell.

[0036] Furthermore, if Figure 1-Figure 5 As shown, the electrode assembly has a pole ear, and an avoidance hole allowing the pole ear to pass through is provided on the end plate 3. The pole ear can pass through the end plate 3 through the avoidance hole, and then the pole ear can be electrically connected to the pole 11 on the cover plate 1. Specifically, the end plate 3 has a groove with an opening toward the cover plate 1, and the excess pole ear can be folded and stored in the groove.

[0037] The lower surface of the lower plastic 2 has a connecting column 21 extending toward the end plate 3, and the connecting column 21 can be plugged into the slot 31. In addition, when the connecting column 21 moves along the slot wall of the slot 31, the cooperation between the lower plastic 2 and the end plate 3 can be better guided and positioned, so that the assembly of the lower plastic 2 and the end plate 3 is more compact. Moreover, after the lower plastic 2 and the end plate 3 are assembled, the relative position between the lower plastic 2 and the end plate 3 is not easy to change, and the lower plastic 2 is fixedly connected to the lower side of the cover plate 1, thereby, the position between the end plate 3 and the cover plate 1 can be better prevented from changing. In this way, after the pole ear is electrically connected to the pole 11 on the cover plate 1 and the excess pole ear is folded and stored in the end plate 3, the pole ear is not easily damaged, so that the battery is not easily short-circuited with the shell due to the tearing of the pole ear. Therefore, the battery cover plate assembly 100 using the new type of battery has good safety.

[0038] In addition, since the connecting column 21 is a column structure, the connecting column 21 is not easily damaged when mating with and disassembling the slot 31 , and can be repeatedly disassembled, thereby improving the reliability of the battery cover assembly 100 .

[0039] Therefore, according to the battery cover assembly 100 of the embodiment of the utility model, a connecting column 21 is provided on the surface of the lower plastic 2 facing the end plate 3, and a slot 31 is provided on the end plate 3 to be plugged with the connecting column 21, which can facilitate the cooperation between the lower plastic 2 and the end plate 3, and the relative position of the lower plastic 2 and the end plate 3 is not easy to change after assembly, which can make the pole ear not easy to be damaged, so that the battery is not easy to be short-circuited with the shell due to the tearing of the pole ear, and the safety is good.

[0040] In some embodiments of the present invention, Figure 1-Figure 5 As shown, a first anti-slip structure 211 is provided on the connecting column 21 , and / or a second anti-slip structure is provided on the slot 31 .

[0041] Exemplarily, the connecting column 21 is provided with a first anti-slip structure 211; Exemplarily, the slot 31 is provided with a second anti-slip structure; Exemplarily, the connecting column 21 is provided with a first anti-slip structure 211, and at the same time, the slot 31 is provided with a second anti-slip structure. Through the first anti-slip structure 211 and the second anti-slip structure, the connection strength of the connecting column 21 and the slot 31 can be made higher after being plugged in and matched, so that the connection between the lower plastic 2 and the end plate 3 after assembly is more reliable.

[0042] Exemplarily, the first anti-skid structure 211 may be an anti-skid protrusion on the outer surface of the connecting column 21; Exemplarily, the second anti-skid structure may be an anti-skid protrusion on the inner wall of the groove. Of course, it can be understood that there are many anti-skid structures that can be used to prevent skidding and increase the connection strength between two detachable parts, and this application will not elaborate on them one by one.

[0043] Optionally, the connecting column 21 is a cylinder, which has a simple structure and is easy to manufacture, thereby reducing the manufacturing cost.

[0044] Exemplarily, the axial dimension of the connecting column 21 may be smaller than or equal to the groove depth of the groove.

[0045] Exemplarily, the groove depth H of the groove satisfies: 4 mm ≤ H ≤ 10 mm.

[0046] Exemplarily, the connecting column 21 is a cylinder, and the diameter D1 satisfies: 3mm≤D1. When the above conditions are met, the connecting column 21 has good structural strength, is not easily damaged, and can more reliably serve as a connecting structure between the lower plastic 2 and the end plate 3.

[0047] Exemplarily, the bottom wall of the groove is provided with a plug-in column 30 extending toward the lower plastic 2, and a slot 31 is provided in the plug-in column 30. The plug-in column 30 is a cylinder, and the diameter D2 of the plug-in column 30 satisfies: 6mm≤D2. By meeting the above conditions, a slot 31 that cooperates with the connecting column 21 can be better constructed in the plug-in column 30, and the plug-in column 30 has a simple structure and is easy to manufacture, which can reduce the manufacturing cost.

[0048] In some embodiments of the present invention, the end plate 3 and the plug-in column 30 are integrally injection-molded parts, which can improve the connection strength between the end plate 3 and the plug-in column 30, so that the lower plastic 2 can be more reliably fixedly connected to the end plate 3.

[0049] In some embodiments of the present invention, Figure 1-Figure 5 As shown, the end plate 3 has a groove opening toward the lower plastic 2, and the lower plastic 2 is located in the groove, wherein the cover plate 1 and the end plate 3 are abutted, and the outer peripheral edge of the lower plastic 2 is abutted against the inner wall of the groove, thereby, after the cover plate 1, the lower plastic 2 and the end plate 3 are matched, the relative positions of the three are relatively stable and not prone to misalignment, so that the pole ear that passes through the end plate 3 and is electrically connected to the pole 11 on the cover plate 1 is not easily damaged, and the battery is not easily short-circuited with the shell due to the tearing of the pole ear, and the safety is good.

[0050] In addition, the lower plastic 2 is completely inside the end plate 3, and the end plate 3 is in direct contact with the cover plate 1, which can better avoid the relative movement of the end plate 3 and the lower plastic 2 after cooperation. Therefore, the present application can better protect the tabs.

[0051] Furthermore, if Figure 1-Figure 5 As shown, the cover plate 1 is in direct contact with the end plate 3, which can improve the structural strength and flatness of the cover plate 1 and better fix the electrode assembly in the battery.

[0052] Optionally, the spacing distance L between the plug-in column 30 and the lower plastic 2 satisfies: 2mm≤L≤5mm, so that the plug-in column 30 can avoid interference with the lower plastic 2 while ensuring the connection strength between the connecting column 21 and the slot 31 .

[0053] like Figure 1-Figure 5 As shown, a partition 32 is provided in the groove, and the partition 32 is used to separate the groove into a plurality of sub-grooves. One of the grooves is a receiving groove 33 for receiving the folded pole ear. The partition 32 is used to separate the receiving groove 33 from other sub-grooves. There is a spacing between the partition 32 and the lower plastic 2, so that the pole ear can be better extended from the receiving groove 33. After the pole ear is extended from the receiving groove 33, it can be better electrically connected to the pole 11.

[0054] In some embodiments of the present invention, Figure 1-Figure 5As shown, two connecting posts 21 are provided, and the two connecting posts 21 are respectively located at the two ends of the length direction of the lower plastic 2, and two slots 31 are provided, and the two connecting posts 21 correspond to the two slots 31 one by one. Through the cooperation of the two connecting posts 21 and the two slots 31, the mutual limitation between the lower plastic 2 and the end plate 3 can be well achieved, and the connection strength between the lower plastic 2 and the end plate 3 can be effectively improved. Therefore, after the cover plate 1, the lower plastic 2 and the end plate 3 are matched, the relative position between the three is relatively stable and not easy to be misaligned, so that the pole ear that is inserted into the end plate 3 and electrically connected to the pole 11 on the cover plate 1 is not easy to be damaged, and the battery is not easy to be short-circuited with the shell due to the tearing of the pole ear, and the safety is good.

[0055] In some embodiments of the present invention, a guiding inclined surface is disposed at the end of the connecting column 21 and / or the opening of the slot 31 .

[0056] Exemplarily, the end of the connecting column 21 is provided with a guiding bevel; Exemplarily, the opening of the slot 31 is provided with a guiding bevel; Exemplarily, the end of the connecting column 21 and the opening of the slot 31 are both provided with guiding bevels. Providing the guiding bevels can make it easier for the connecting column 21 and the slot 31 to fit together, which can reduce the difficulty of assembly and improve the assembly efficiency.

[0057] In some embodiments of the present invention, the lower plastic 2 and the connecting column 21 are an integrated component formed in one piece.

[0058] Exemplarily, the lower plastic 2 and the connecting column 21 can be integrally formed by injection molding, which can improve the connection strength between the lower plastic 2 and the connecting column 21, so that the lower plastic 2 can be more reliably fixedly connected to the end plate 3.

[0059] Exemplarily, the connecting column 21 may also be made of other materials, such as metal parts. The connecting column 21 may be manufactured by the lower plastic 2 through an injection molding process and embedded in the lower plastic 2. Therefore, the connection strength between the connecting column 21 and the lower plastic 2 is better.

[0060] Exemplarily, the end plate 3 may be formed by injection molding of polypropylene or polyethylene.

[0061] The utility model also provides a battery having the battery cover assembly 100 of the above embodiment.

[0062] According to the battery of the embodiment of the utility model, by providing the battery cover assembly 100 of the above embodiment, it can be beneficial to the cooperation between the lower plastic 2 and the end plate 3, and the relative position of the lower plastic 2 and the end plate 3 is not easy to change after assembly, which can make the pole ear not easy to be damaged, so that the battery is not easy to be short-circuited with the shell due to the tearing of the pole ear, and the safety is good.

[0063] Other structures and operations of the battery cover assembly 100 and the battery according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

[0064] In the description of this specification, the description with reference to the terms "some embodiments", "optionally", "further" 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 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.

[0065] 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 battery cover assembly, characterized in that: include: Cover plate; A lower plastic, the lower plastic being installed on one side of the cover plate; The end plate is installed on the side of the lower plastic away from the cover plate, wherein the surface of the lower plastic facing the end plate is provided with a connecting column, and the end plate is provided with a slot that is plugged with the connecting column.

2. The battery cover assembly according to claim 1, characterized in that: The connecting column is provided with a first anti-slip structure, and / or the slot is provided with a second anti-slip structure.

3. The battery cover assembly according to claim 1, characterized in that: The connecting column is a cylinder.

4. The battery cover assembly according to claim 1, characterized in that: The end plate has a groove opening toward the lower plastic, and the lower plastic is located in the groove, wherein the cover plate abuts against the end plate, and the outer periphery of the lower plastic abuts against the inner wall of the groove.

5. The battery cover assembly according to claim 4, characterized in that: The bottom wall of the groove is provided with an inserting column extending toward the lower plastic, and the inserting column has the slot therein.

6. The battery cover assembly according to claim 5, characterized in that: The spacing distance L between the plug-in column and the lower plastic meets the following conditions: 2mm≤L≤5mm.

7. The battery cover assembly according to claim 1, characterized in that: There are two connecting posts, which are respectively located at two ends of the lower plastic in the length direction. There are two slots, which correspond to each other one by one.

8. The battery cover assembly according to claim 1, characterized in that: The end of the connecting column and / or the opening of the slot are provided with a guiding inclined surface.

9. The battery cover assembly according to claim 1, characterized in that: The lower plastic and the connecting column are an integrated part formed in one piece.

10. A battery, characterized in that: A battery cover assembly comprising any one of claims 1-9.

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