Battery top cover assembly and battery

Abstract

The utility model provides a battery top cover assembly and a battery, and relates to the technical field of batteries. The battery top cover assembly comprises a top cover piece, an injection molding piece, a ceramic piece and a pole. The top cover piece is provided with a first surface and a second surface opposite to the first surface in the thickness direction of the top cover piece, the top cover piece is provided with a first mounting hole, and the first mounting hole penetrates through the first surface and the second surface. The pole penetrates through the first mounting hole, and at least part of the injection molding piece seals a first gap between the pole and the first mounting hole. The ceramic piece comprises a connecting ring and an abutting plate, the connecting ring is arranged at the first connecting end of the pole in a sleeving manner, and the connecting ring is connected with the first connecting end of the pole. The first end of the abutting plate is connected with the connecting ring, and the second end of the abutting plate abuts against the first surface of the top cover piece. The injection molding part can be formed in the ceramic part in an injection molding mode, sealing, insulation and connection of the pole and the top cover plate are achieved through the injection molding part, assembling is more convenient, and the sealing effect is better.

Description

Technical Field

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

[0002] The power battery on the market includes a top cover assembly, which includes at least one pole and a plain aluminum sheet. The plain aluminum sheet is provided with an opening for setting the pole. In order to ensure insulation and a sealed connection between the pole and the plain aluminum sheet, the top cover assembly also includes a sealing ring, upper plastic and lower plastic that are matched with the pole.

[0003] In the existing top cover assembly, the pole and the bare aluminum sheet are connected only by the upper plastic. Under high temperature environment or when subjected to longitudinal pressure, the upper plastic is prone to creep, resulting in a worse limiting effect of the upper plastic on the pole, thereby creating the risk of the pole sinking and causing poor use of the battery. Utility Model Content

[0004] The utility model aims to provide a battery top cover assembly and a battery, which can form an injection molded part in a ceramic part by injection molding, and utilize the injection molded part to achieve sealing, insulation and connection between the pole and the top cover plate, so that assembly is more convenient and the sealing effect is better.

[0005] The embodiment of the utility model is achieved as follows:

[0006] In a first aspect, the utility model provides a battery top cover assembly, including a top cover sheet, an injection molded part, a ceramic part and a pole;

[0007] The top cover sheet has a first surface and a second surface opposite to the first surface in the thickness direction, and the top cover sheet is provided with a first mounting hole, and the first mounting hole passes through the first surface and the second surface;

[0008] The pole is inserted into the first mounting hole, wherein the pole has a first connecting end;

[0009] At least a portion of the injection molded part seals a first gap between the pole and the first mounting hole;

[0010] The ceramic component includes a connecting ring and an abutment plate, wherein the connecting ring is sleeved on the first connecting end of the pole, and the connecting ring is connected to the first connecting end of the pole; the abutment plate has a first end and a second end opposite to the first end, the first end of the abutment plate is connected to the connecting ring, and the second end of the abutment plate abuts against the first surface of the top cover sheet.

[0011] In an optional embodiment, the inner wall of the connecting ring is provided with a first thread; and the first connecting end of the pole is provided with a second thread that is threadably matched with the first thread.

[0012] In an optional embodiment, a slot for plugging and cooperating with the second end of the abutment plate is formed inwardly on the first surface of the top cover plate.

[0013] In an optional embodiment, the second end of the abutment plate is provided with a first guide slope for guiding the second end of the abutment plate to be inserted into the slot; or, a second guide slope is provided at the notch of the slot to guide the second end of the abutment plate to be inserted into the slot.

[0014] In an optional embodiment, the abutment plate is cylindrical, and a portion of the injection molded part seals a second gap between the pole and the ceramic part, wherein the second gap is connected to the first gap.

[0015] In an optional embodiment, the connecting ring is provided with an injection hole for injecting injection molding raw material; the injection hole is communicated with the second gap.

[0016] In an optional embodiment, it also includes an insulating member, which is attached to the second surface of the top cover sheet; the insulating member is provided with a second mounting hole connected to the first mounting hole, and the pole is passed through the second mounting hole; the injection molded part partially seals the third gap between the pole and the second mounting hole, wherein the third gap is connected to the second gap.

[0017] In an optional embodiment, the surface of the top cover sheet in contact with the injection molded part and / or the surface of the pole in contact with the injection molded part are both rough surfaces; nanopores are formed on the rough surfaces, and part of the injection molded part is embedded in the nanopores.

[0018] In an optional embodiment, the first mounting hole includes a first hole section and a second hole section which are sequentially connected along a direction from the first surface to the second surface, a radial dimension of the first hole is larger than a radial dimension of the second hole section, and a connecting groove is provided at the bottom of the hole of the first hole section, wherein a cross-section of the connecting groove is one or a combination of an inverted T-shaped structure, a triangular structure, and a threaded hole structure.

[0019] In a second aspect, this embodiment further provides a battery, comprising a housing, a battery cell, and a top cover assembly as described in any of the above optional embodiments;

[0020] The battery cell is installed in the shell, the top cover assembly is installed on the shell, and the battery cell is electrically connected to the pole.

[0021] The beneficial effects of a battery top cover assembly and a battery provided by the embodiment of the utility model include:

[0022] The present application arranges the ceramic part on the outside of the pole and connects the ceramic part to the pole, so that the pole and the top cover plate can be fixed more conveniently. The ceramic part is arranged between the pole and the first connection hole, so that the injection molded part can be used to achieve sealing, insulation and connection between the pole and the top cover plate, which makes assembly more convenient and has a better sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A partial cross-sectional schematic diagram of a top cover assembly provided in an embodiment of the utility model.

[0025] icon:

[0026] 100-top cover assembly;

[0027] 110 - top cover plate; 111 - first mounting hole; 113 - slot; 115 - connection slot;

[0028] 130 - insulating member; 131 - second mounting hole;

[0029] 150-Injection molded parts;

[0030] 170 - ceramic part; 173 - first guide slope; 175 - injection hole;

[0031] 190-Pole. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0035] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply 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, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0036] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0037] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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.

[0038] Example

[0039] This embodiment provides a battery, which can be used as a power source for electric vehicles, electric tools, etc.

[0040] Please refer to Figure 1 In this embodiment, the battery includes a shell, a battery cell and a top cover assembly 100. The battery cell is installed in the shell, and the top cover assembly 100 is installed at the opening of the shell to close the opening. The battery cell is electrically connected to the pole 190 of the top cover assembly 100.

[0041] In this embodiment, the top cover assembly 100 includes a top cover sheet 110, an injection molded part 150, a ceramic part 170 and a pole 190. The top cover sheet 110 has a first surface and a second surface opposite to the first surface in its thickness direction, and the top cover sheet 110 is provided with a first mounting hole 111, and the first mounting hole 111 passes through the first surface and the second surface. The pole 190 is arranged in the first mounting hole 111, wherein the pole 190 has a first connecting end. At least part of the injection molded part 150 seals the first gap between the pole 190 and the first mounting hole 111. The ceramic part 170 includes a connecting ring and an abutting plate, the connecting ring is sleeved on the first connecting end of the pole 190, and the connecting ring is connected to the first connecting end of the pole 190; the abutting plate has a first end and a second end opposite to the first end, the first end of the abutting plate is connected to the connecting ring, and the second end of the abutting plate abuts against the first surface of the top cover sheet 110.

[0042] In this embodiment, the ceramic part 170 is arranged outside the pole 190 and connected to the pole 190, so that the pole 190 and the top cover plate 110 can be fixed more conveniently. It is arranged between the pole 190 and the first connection hole, so that the injection molded part 150 can be used to achieve sealing, insulation and connection between the pole 190 and the top cover plate, which is more convenient to assemble and has a better sealing effect. Since ceramic has good insulation, the ceramic part 170 is selected in this embodiment to connect and fix the pole 190 to achieve better connection.

[0043] In this embodiment, the inner wall of the connecting ring is provided with a first thread; the first connecting end of the pole 190 is provided with a second thread that is threadably matched with the first thread.

[0044] In this embodiment, a first thread is provided on the inner wall of the connecting ring, and a second thread is provided on the first connecting end of the pole 190 , so that the ceramic component 170 can be conveniently assembled on the pole 190 through thread matching.

[0045] In this embodiment, a first surface of the top cover sheet 110 is concavely formed with a slot 113 which is plugged and matched with the second end of the abutment plate.

[0046] In this embodiment, the slot 113 is provided to achieve bottom limiting and sealing of the ceramic component 170 .

[0047] In this embodiment, the second end of the abutting plate is provided with a first guiding inclined surface 173 for guiding the second end of the abutting plate to be inserted into the slot 113 .

[0048] In this embodiment, the first guiding inclined surface 173 is provided to facilitate assembly.

[0049] Of course, in some embodiments of the present application, a second guiding slope is also provided at the notch of the slot 113 to guide the second end of the abutment plate to be inserted into the slot 113. The second guiding slope is used to guide the second end so that the bottom end of the ceramic piece 170 is assembled in the slot 113.

[0050] In this embodiment, the abutting plate is cylindrical, and a portion of the injection molded part 150 seals a second gap between the pole 190 and the ceramic part 170 , wherein the second gap is connected to the first gap.

[0051] In this embodiment, the injection molded part 150 is used to seal the second gap between the pole 190 and the cylindrical abutting plate, which can achieve better sealing and improve the stability of the installation of the pole 190 .

[0052] In this embodiment, the connection ring is provided with an injection hole 175 for injecting injection molding material; the injection hole 175 is communicated with the second gap.

[0053] In this embodiment, an injection hole 175 is provided on the connecting ring, so that the injection molded part 150 can be directly injection molded in the first gap and the second gap, which makes the molding of the injection molded part 150 more convenient.

[0054] In this embodiment, the battery top cover assembly 100 also includes an insulating member 130, which is attached to the second surface of the top cover sheet 110; the insulating member 130 is provided with a second mounting hole 131 connected to the first mounting hole 111, and the pole 190 is passed through the second mounting hole 131; the injection molded part 150 partially seals the third gap between the pole 190 and the second mounting hole 131, wherein the third gap is connected to the second gap.

[0055] In this embodiment, the insulation between the pole 190 and the second surface can be better achieved by providing the insulating member 130. The injection molded member 150 is simultaneously injection molded in the third gap, which can further improve the sealing performance.

[0056] In this embodiment, the surface of the top cover sheet 110 that contacts the injection molded part 150 and / or the surface of the pole 190 that contacts the injection molded part 150 are both rough surfaces; nanopores are formed on the rough surfaces, and part of the injection molded part 150 is embedded in the nanopores.

[0057] In this embodiment, the rough surface and nanopores are provided, so that the bonding strength between the injection molded part 150 and the top cover sheet 110 can be improved.

[0058] In this embodiment, the first mounting hole 111 includes a first hole section and a second hole section which are connected in sequence along the direction from the first surface to the second surface, the radial dimension of the first hole is larger than the radial dimension of the second hole section, and a connecting groove 115 is provided at the bottom of the first hole section, wherein the cross-section of the connecting groove 115 is one or a combination of an inverted T-shaped structure, a triangular structure, and a threaded hole structure.

[0059] The above arrangement in this embodiment can enhance the bonding strength of the injection molded part 150 so that the bonding between the two is more secure.

[0060] In summary, the battery top cover assembly 100 and the battery provided by the embodiment of the utility model have the following beneficial effects:

[0061] In this embodiment, the ceramic part 170 is covered on the outside of the injection molded part 150, and the ceramic part 170 is connected to the pole 190, the injection molded part and the top cover plate 110, so as to enclose a cavity, and the injection molded part 150 is formed by injection molding into the cavity, so that the injection molded part 150 is formed on the outer periphery of the pole 190 to achieve a sealed and insulated connection between the pole 190 and the top cover plate 110. In this way, the injection molded part 150 is used to achieve sealing, insulation and connection between the pole 190 and the top cover plate, which makes assembly more convenient and has a better sealing effect.

[0062] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A battery top cover assembly, characterized in that: It comprises a top cover sheet (110), an injection molded part (150), a ceramic part (170) and a pole (190); The top cover sheet (110) has a first surface and a second surface opposite to the first surface in the thickness direction thereof, and the top cover sheet (110) is provided with a first mounting hole (111), and the first mounting hole (111) passes through the first surface and the second surface; The pole (190) is inserted into the first mounting hole (111), wherein the pole (190) has a first connection end; At least a portion of the injection molded part (150) seals a first gap between the pole (190) and the first mounting hole (111); The ceramic component (170) comprises a connecting ring and an abutment plate, wherein the connecting ring is sleeved on the first connecting end of the pole (190), and the connecting ring is connected to the first connecting end of the pole (190); the abutment plate has a first end and a second end opposite to the first end, the first end of the abutment plate is connected to the connecting ring, and the second end of the abutment plate abuts against the first surface of the top cover sheet (110).

2. The battery top cover assembly according to claim 1, characterized in that: The inner wall of the connecting ring is provided with a first thread; the first connecting end of the pole (190) is provided with a second thread that is threadably matched with the first thread.

3. The battery top cover assembly according to claim 1, characterized in that: The first surface of the top cover sheet (110) is concavely formed with a slot (113) that is plugged and matched with the second end of the abutment plate.

4. The battery top cover assembly according to claim 3, characterized in that: The second end of the abutment plate is provided with a first guiding inclined surface (173) for guiding the second end of the abutment plate to be inserted into the slot (113); or, a second guiding inclined surface is provided at the notch of the slot (113) for guiding the second end of the abutment plate to be inserted into the slot (113).

5. The battery top cover assembly according to any one of claims 1 to 4, characterized in that: The abutment plate is cylindrical, and a portion of the injection molded part (150) seals a second gap between the pole (190) and the ceramic part (170), wherein the second gap is connected to the first gap.

6. The battery top cover assembly according to claim 5, characterized in that: The connecting ring is provided with an injection hole (175) for injecting injection molding raw materials; the injection hole (175) is communicated with the second gap.

7. The battery top cover assembly according to claim 5, characterized in that: The battery top cover assembly further comprises an insulating member (130), wherein the insulating member (130) is attached to the second surface of the top cover sheet (110); the insulating member (130) is provided with a second mounting hole (131) connected to the first mounting hole (111), and the pole (190) is passed through the second mounting hole (131); a portion of the injection molded part (150) seals a third gap between the pole (190) and the second mounting hole (131), wherein the third gap is connected to the second gap.

8. The battery top cover assembly according to claim 7, characterized in that: The surface of the top cover sheet (110) used to contact the injection molded part (150) and / or the surface of the pole (190) used to contact the injection molded part (150) are both rough surfaces; The rough surface is formed with nanopores, and a portion of the injection molded part (150) is embedded in the nanopores.

9. The battery top cover assembly according to claim 1, characterized in that: The first mounting hole (111) comprises a first hole section and a second hole section which are sequentially connected along a direction from the first surface to the second surface, the radial dimension of the first hole is larger than the radial dimension of the second hole section, and a connecting groove (115) is provided at the bottom of the hole of the first hole section, wherein the cross section of the connecting groove (115) is one or a combination of an inverted T-shaped structure, a triangular structure, and a threaded hole structure.

10. A battery, characterized in that: Comprising a housing, a battery cell and a top cover assembly as described in any one of claims 1 to 9; The battery cell is installed in the shell, the top cover assembly is installed on the shell, and the battery cell is electrically connected to the pole (190).

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