Terminal assembly, battery cover plate, battery and electric equipment

Abstract

The utility model discloses a terminal assembly, a battery cover plate, a battery and electric equipment, and the terminal assembly comprises a substrate which is provided with a mounting hole; the polar column is arranged in the mounting hole, and a part of the polar column extends out of the mounting hole; the ceramic ring is arranged in the mounting hole, the ceramic ring is arranged on the periphery of the pole in a sleeving manner, and a mounting gap is formed among the substrate, the pole and the ceramic ring; and the sealing element is an insulating material element, and the sealing element is arranged in the mounting gap. According to the terminal assembly provided by the utility model, the insulating sealing element is arranged in the mounting gap formed among the substrate, the pole and the ceramic ring, and the mounting gap is filled with the sealing element, so that the problem of electrolyte trapping is avoided, and the voltage abnormity of the battery cell shell is effectively prevented. Meanwhile, welding slag can be effectively prevented from entering the pole core, and thermal runaway of the battery core is prevented. According to the utility model, a sealing ring and an insulating ring in the prior art are omitted, the assembly of the terminal assembly is simplified, the number of parts is small, and the complexity of the assembly process is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery manufacturing, and more specifically, to a terminal assembly, a battery cover, a battery and an electrical device. Background Art

[0002] In the existing terminal structure, for example, the square secondary battery terminal structure, the ceramic ring, the pole and the fixed disc will have welding slag during the brazing process. Due to the design of the pole and the ceramic ring, it is difficult to clean them. Metal particles enter the pole core, which can easily cause an internal short circuit in the battery cell, and then cause thermal runaway of the battery cell.

[0003] The prior art sets a sealing ring to prevent metal particles from entering the pole core. However, the setting of the sealing ring will trap the electrolyte in the cavity formed by the sealing ring, the fixed disc, the ceramic ring, and the pole, thereby causing abnormal voltage in the battery shell. In addition, in order to improve the insulation between the pole, the fixed disc, and the substrate, the prior art sets an insulating ring, resulting in a large number of terminal structure parts and a complicated assembly process. Utility Model Content

[0004] One purpose of the utility model is to provide a new technical solution for a terminal assembly, a battery cover, a battery and an electrical device, which can at least solve the problems in the prior art that the voltage of the battery cell casing is easily abnormal, the number of parts is large, and the assembly process is complicated.

[0005] The first aspect of the utility model provides a terminal assembly, comprising: a substrate, wherein a mounting hole is provided on the substrate; a pole, wherein the pole is arranged in the mounting hole, and a portion of the pole extends out of the mounting hole; a ceramic ring, wherein the ceramic ring is arranged in the mounting hole, and the ceramic ring is sleeved on the periphery of the pole, and an installation gap is formed between the substrate, the pole and the ceramic ring; and a sealing member, wherein the sealing member is an insulating material member and is arranged in the installation gap.

[0006] Optionally, the seal is injection molded in the installation gap.

[0007] Optionally, the ceramic ring has a top surface and a bottom surface which are arranged opposite to each other along its axial direction, and the sealing member extends from the top surface of the ceramic ring to the bottom surface of the ceramic ring and is connected to the substrate.

[0008] Optionally, the top surface and the bottom surface of the ceramic ring respectively form recesses at portions close to the central axis of the pole, and a portion of the sealing member is disposed in the recesses.

[0009] Optionally, the terminal assembly further comprises: a fixing ring, the fixing ring being arranged on the bottom surface of the ceramic ring, and the sealing member filling an installation gap between the fixing ring and the pole.

[0010] Optionally, the terminal assembly also includes: a plastic part and a connecting piece, the plastic part is arranged at the bottom of the substrate, the connecting piece is located at the bottom of the plastic part, a portion of the connecting piece corresponds to the position of the fixing ring, the connecting piece and the fixing ring are connected through the sealing member, and a portion of the sealing member extends to the plastic part along the length direction of the substrate.

[0011] Optionally, a portion of the sealing member extends from the bottom surface of the fixing ring along the length direction of the substrate, and the sealing member fills an installation gap formed by the fixing ring and the substrate.

[0012] Optionally, the ceramic ring is brazed to the pole and the fixing ring respectively to form an integral structural member.

[0013] Optionally, the integral structural component is laser welded to the substrate, and the sealing component at least covers the welding mark between the integral structural component and the substrate.

[0014] A second aspect of the present invention provides a battery cover, comprising the terminal assembly described in the above embodiment.

[0015] A third aspect of the present invention provides a battery, comprising the battery cover described in the above embodiment.

[0016] A fourth aspect of the present invention provides an electrical device comprising the battery described in the above embodiment.

[0017] The terminal assembly of the utility model provides an insulating seal in the installation gap formed between the substrate, the pole and the ceramic ring. The installation gap is filled by the seal, so there is no problem of electrolyte entrapment, and the voltage abnormality of the battery shell is effectively prevented. At the same time, it can effectively prevent welding slag from entering the pole core and prevent thermal runaway of the battery core. The utility model eliminates the setting of the sealing ring and the insulating ring in the prior art by injection molding the seal, which greatly simplifies the assembly of the terminal assembly, reduces the number of parts, and reduces the complexity of the assembly process.

[0018] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0020] Figure 1 is a cross-sectional view of a terminal assembly according to an embodiment of the utility model;

[0021] Figure 2 It is a structural schematic diagram of a battery cover according to an embodiment of the utility model;

[0022] Figure 3 is a schematic structural diagram of a battery according to an embodiment of the utility model;

[0023] Figure 4 It is a partial cross-sectional view of a battery according to an embodiment of the utility model.

[0024] Reference numerals:

[0025] Terminal assembly 100;

[0026] substrate 10;

[0027] Pole 20;

[0028] Ceramic ring 30; recess 31;

[0029] Seal 40;

[0030] Plastic parts 50;

[0031] Connecting piece 60;

[0032] A fixing ring 70;

[0033] Battery cover 200;

[0034] Battery 300; aluminum shell 310; battery cell 320. DETAILED DESCRIPTION

[0035] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0036] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present invention, its application, or uses.

[0037] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0038] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0039] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0040] In the specification and claims of the utility model, if the term "first" or "second" is involved, it may explicitly or implicitly include one or more of the features. In the description of the utility model, unless otherwise specified, "multiple" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the related objects are in an "or" relationship.

[0041] 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, which are only for the convenience of describing the present invention and simplifying the description, and do 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 should not be understood as a limitation on the present invention.

[0042] 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" involved 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 an indirect connection 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 utility model can be understood according to specific circumstances.

[0043] The terminal assembly 100 according to the embodiment of the utility model is described in detail below with reference to the accompanying drawings.

[0044] like Figure 1 and Figure 4 As shown, the terminal assembly 100 according to the embodiment of the present invention includes a substrate 10 , a pole 20 , a ceramic ring 30 and a sealing member 40 .

[0045] Specifically, a mounting hole is provided on the substrate 10. The pole 20 is provided in the mounting hole, and a portion of the pole 20 extends out of the mounting hole. The ceramic ring 30 is provided in the mounting hole, and the ceramic ring 30 is sleeved on the periphery of the pole 20, and a mounting gap is formed between the substrate 10, the pole 20 and the ceramic ring 30. The sealing member 40 is an insulating material member, and the sealing member 40 is provided in the mounting gap.

[0046] In other words, see Figure 1 and Figure 4According to the embodiment of the utility model, the terminal assembly 100 is mainly composed of a substrate 10, a pole 20, a ceramic ring 30 and a seal 40. Among them, a mounting hole is provided on the substrate 10. The pole 20 is installed in the mounting hole, and a part of the pole 20 extends out of the mounting hole. The ceramic ring 30 is installed in the mounting hole, and the ceramic ring 30 is sleeved on the periphery of the pole 20. The top of the ceramic ring 30 can be connected to the pole 20. The top and bottom of the ceramic ring 30 can be understood as two opposite end faces of the ceramic ring 30 in the axial direction. The seal 40 can be made of insulating material to ensure that the seal 40 has insulating properties. An installation gap is formed between the substrate 10, the pole 20 and the ceramic ring 30, and the seal 40 is arranged in the installation gap formed between the substrate 10, the pole 20 and the ceramic ring 30. By providing an insulating seal 40 in the installation gap formed between the substrate 10, the pole 20 and the ceramic ring 30, the installation gap is filled by the seal 40, so that the problem of trapped electrolyte does not occur, and the voltage abnormality of the battery cell 320 shell is effectively prevented. At the same time, it can effectively prevent welding slag from entering the pole core and prevent the battery cell 320 from thermal runaway. In addition, by providing the seal 40, the utility model eliminates the provision of the sealing ring and the insulating ring in the prior art, greatly simplifying the assembly of the terminal assembly 100, reducing the number of parts, and reducing the complexity of the assembly process.

[0047] According to one embodiment of the utility model, the seal 40 is injection molded in the installation gap. By injection molding the insulating seal 40 in the installation gap formed between the substrate 10, the pole 20 and the ceramic ring 30, the installation gap is filled with the seal 40, and the problem of trapped electrolyte will not occur, effectively preventing the voltage abnormality of the battery cell 320 shell. At the same time, it can effectively prevent welding slag from entering the pole core and prevent the battery cell 320 from thermal runaway. In addition, the utility model eliminates the setting of the sealing ring and the insulating ring in the prior art by injection molding the seal 40, which greatly simplifies the assembly of the terminal assembly 100, reduces the number of parts, and reduces the complexity of the assembly process.

[0048] Compared with the prior art, by injection molding an insulating seal 40 in the installation gap formed between the substrate 10, the pole 20 and the ceramic ring 30, the substrate 10, the pole 20 and the ceramic ring 30 are formed into a stable whole, and the setting of the sealing ring and the insulating ring is eliminated. The injection molding process is simple and ensures better installation stability of the terminal assembly 100 as a whole. Of course, for those skilled in the art, the principle of the injection molding process is understandable and can be implemented, and it will not be repeated in detail in the present utility model.

[0049] Therefore, according to the terminal assembly 100 of the embodiment of the utility model, by injection molding the insulating seal 40 in the installation gap formed between the substrate 10, the pole 20 and the ceramic ring 30, the installation gap is filled by the seal 40, and the problem of trapped electrolyte will not occur, effectively preventing the voltage abnormality of the battery cell 320 shell. At the same time, it can effectively prevent welding slag from entering the pole core and prevent the battery cell 320 from thermal runaway. The utility model eliminates the setting of the sealing ring and the insulating ring in the prior art by injection molding the seal 40, greatly simplifies the assembly of the terminal assembly 100, reduces the number of parts, and reduces the complexity of the assembly process.

[0050] According to an embodiment of the present invention, the ceramic ring 30 has a top surface and a bottom surface arranged opposite to each other along its axial direction, and the sealing member 40 extends from the top surface of the ceramic ring 30 to the bottom surface of the ceramic ring 30 and is connected to the substrate 10. In other words, Figure 1 and Figure 4 As shown, the ceramic ring 30 has a top surface and a bottom surface arranged oppositely along its axial direction. The seal 40 can be injection molded on the top surface of the ceramic ring 30 and extend to the bottom surface of the ceramic ring 30, effectively filling between the ceramic ring 30 and the pole 20, solving the problem of trapped electrolyte, effectively preventing the voltage abnormality of the battery cell 320 shell, and at the same time preventing welding slag from entering the pole core, preventing thermal runaway of the battery cell 320. And because the seal 40 is an insulating material, the setting of the insulating ring can be eliminated, reducing the parts of the terminal assembly 100 and reducing the complexity of the assembly process.

[0051] According to an embodiment of the utility model, the top and bottom surfaces of the ceramic ring 30 respectively form recesses 31 at the portions close to the central axis of the pole 20, and a portion of the seal 40 is disposed in the recesses 31. That is, the ceramic ring 30 has recesses 31 at the portions close to the central axis of the pole 20 at the two opposite end surfaces (top and bottom) in the axial direction, and a portion of the seal 40 is disposed in the recesses 31. By providing the recesses 31 on the top and bottom surfaces of the ceramic ring 30, it is convenient for the seal 40 to be formed by injection molding in the terminal assembly 100.

[0052] According to an embodiment of the present invention, the terminal assembly 100 further includes a fixing ring 70 , which is disposed on the bottom surface of the ceramic ring 30 , and a sealing member 40 fills the installation gap between the fixing ring 70 and the pole 20 .

[0053] In other words, Figure 1 and Figure 4As shown, the terminal assembly 100 also includes a fixing ring 70, which is installed on the bottom surface of the ceramic ring 30. The seal 40 can fill the installation gap between the fixing ring 70 and the pole 20, and effectively isolate the ceramic ring 30, the fixing ring 70 and the pole 20, thereby solving the problem of trapped electrolyte, effectively preventing abnormal voltage in the outer shell of the battery cell 320, and preventing welding slag from entering the interior of the pole core, thereby preventing thermal runaway of the battery cell 320.

[0054] According to one embodiment of the utility model, Figure 1 and Figure 4 As shown, the terminal assembly 100 also includes: a plastic part 50 and a connecting piece 60, the plastic part 50 is arranged at the bottom of the substrate 10, the connecting piece 60 is located at the bottom of the plastic part 50, a portion of the connecting piece 60 corresponds to the position of the fixing ring 70, the connecting piece 60 and the fixing ring 70 are connected by a sealing member 40, and a portion of the sealing member 40 extends to the plastic part 50 along the length direction of the substrate 100.

[0055] That is to say, Figure 1 and Figure 4 As shown, the terminal assembly 100 also includes a plastic part 50 and a connecting piece 60, wherein the plastic part 50 is arranged at the bottom of the substrate 10, and the connecting piece 60 is arranged at the bottom of the plastic part 50. And a part of the connecting piece 60 corresponds to the position of the fixing ring 70. The connecting piece 60 and the fixing ring 70 can be connected by a sealing member 40, and a part of the sealing member 40 extends to the plastic part 50 along the length direction of the substrate 100. Thereby further filling the installation gap between the connecting piece 60 and the fixing ring 70, solving the problem of trapped electrolyte, effectively preventing the voltage abnormality of the outer shell of the battery cell 320, and preventing welding slag from entering the pole core, preventing the battery cell 320 from thermal runaway.

[0056] like Figure 1 and Figure 4 As shown, during the assembly process of the terminal assembly 100 of the present invention, the ceramic ring 30 is connected to the pole 20 and the fixing ring 70 by brazing to form a whole, and then connected to the substrate 10 by laser welding. Then, the seal 40 is made by injection molding, and the seal 40 can cover the welding mark between the fixing ring 70 and the substrate 10. Finally, the plastic part 50 and the connecting piece 60 are assembled, and the connecting piece 60 and the pole 20 are connected by laser welding to complete the assembly of the terminal assembly 100.

[0057] According to an embodiment of the present invention, a portion of the sealing member 40 extends from the bottom surface of the fixing ring 70 along the length direction of the substrate 10 , and the sealing member 40 fills the installation gap formed by the fixing ring 70 and the substrate 10 .

[0058] In other words, Figure 1 and Figure 4As shown, during the injection molding process of the seal 40, a portion of the seal 40 can extend from the bottom surface of the fixing ring 70 along the length direction of the substrate 10, ensuring that the seal 40 can fill the installation gap formed by the fixing ring 70 and the substrate 10, effectively isolating the ceramic ring 30, the fixing ring 70 and the pole 20, solving the problem of trapped electrolyte, effectively preventing the voltage abnormality of the battery cell 320 shell, and at the same time preventing welding slag from entering the pole core, preventing the battery cell 320 from thermal runaway. It should be noted that the top surface and the bottom surface of the fixing ring 70 are two opposite end surfaces in the axial direction of the fixing ring 70, the top surface of the fixing ring 70 faces the ceramic ring 30, and the bottom surface of the fixing ring 70 faces away from the ceramic ring 30.

[0059] In the present utility model, if Figure 1 and Figure 4 As shown, the specific shape of the seal 40 after injection molding is roughly a columnar structure, and the radial dimension of the end of the seal 40 facing the top of the pole 20 is smaller than the radial dimension of the end facing away from the top of the pole 20, ensuring that the seal 40 can fill the installation gap formed by the fixing ring 70 and the substrate 10, and effectively isolate the ceramic ring 30, the fixing ring 70 and the pole 20. Of course, the specific shape and specific size of the seal 40 can be specifically set according to the shape and size of the installation gap formed by the ceramic ring 30, the fixing ring 70 and the pole 20 during the installation process, and will not be described in detail in the present utility model.

[0060] According to an embodiment of the utility model, the ceramic ring 30 is brazed to the pole 20 and the fixing ring 70 respectively to form an integral structural member. That is, during the assembly process of the terminal assembly 100, the ceramic ring 30 can be brazed to the pole 20 and the fixing ring 70 respectively, and the ceramic ring 30, the pole 20 and the fixing ring 70 are brazed to form an integral structural member, thereby improving the stability of the assembly of the terminal assembly 100.

[0061] According to one embodiment of the present invention, the integral structural member is laser welded to the substrate 10, and the sealing member 40 at least covers the welding mark between the integral structural member and the substrate 10. In other words, Figure 1 and Figure 4As shown, after the ceramic ring 30 can be brazed with the pole 20 and the fixing ring 70 to form an integral structure, it can be connected to the substrate 10 by laser welding, and the seal 40 at least covers the welding mark between the integral structure and the substrate 10. By injection molding the seal 40 in the installation gap formed between the substrate 10, the pole 20, the ceramic ring 30 and the fixing ring 70, the problem of trapped electrolyte is solved, and the voltage abnormality of the battery cell 320 shell is effectively prevented. At the same time, it can also prevent welding slag from entering the pole core and prevent the battery cell 320 from thermal runaway. And because the seal 40 is an insulating material, the setting of the insulating ring can be eliminated, reducing the parts of the terminal assembly 100 and reducing the complexity of the assembly process.

[0062] Of course, for those skilled in the art, other structures and working principles of the terminal assembly 100 are understandable and achievable, and will not be described in detail in the present invention.

[0063] In summary, according to the terminal assembly 100 of the embodiment of the utility model, the insulating seal 40 is injection molded in the installation gap formed between the substrate 10, the pole 20, the ceramic ring 30 and the fixing ring 70, and the installation gap is filled by the seal 40, so that the problem of trapped electrolyte will not occur, and the voltage abnormality of the battery cell 320 shell can be effectively prevented. At the same time, it can effectively prevent welding slag from entering the interior of the pole core and prevent the battery cell 320 from thermal runaway. The utility model eliminates the setting of the sealing ring and the insulating ring in the prior art by injection molding the seal 40, which greatly simplifies the assembly of the terminal assembly 100, reduces the number of parts, and reduces the complexity of the assembly process.

[0064] According to the second aspect of the embodiment of the present utility model, Figure 2 As shown, a battery cover plate 200 is provided, and the battery cover plate 200 can be a square secondary battery cover plate, and the battery cover plate 200 includes the terminal assembly 100 in the above embodiment. Since the terminal assembly 100 according to the embodiment of the utility model has the above technical effects, the battery cover plate 200 according to the embodiment of the utility model should also have corresponding technical effects, that is, the battery cover plate 200 of the utility model adopts the terminal assembly 100, and there will be no problem of trapped electrolyte, which effectively prevents the voltage abnormality of the outer shell of the battery cell 320. At the same time, it can effectively prevent welding slag from entering the interior of the pole core and prevent the battery cell 320 from thermal runaway. The battery cover plate 200 of the utility model, through the injection molding seal 40, cancels the setting of the sealing ring and the insulating ring in the prior art, greatly simplifies the assembly of the battery cover plate 200, has fewer parts, and reduces the complexity of the assembly process.

[0065] Of course, for those skilled in the art, other structures and working principles of the battery cover 200 are understandable and achievable, and will not be described in detail in the present invention.

[0066] According to the third aspect of the utility model, Figure 3 and Figure 4 As shown, a battery 300 is provided, which can be a square secondary battery. The battery 300 of the utility model includes the battery cover 200 in the above embodiment. Since the battery cover 200 according to the embodiment of the utility model has the above technical effects, the battery 300 according to the embodiment of the utility model should also have the corresponding technical effects, that is, the battery 300 of the utility model will not have the problem of trapped electrolyte by adopting the battery cover 200, and effectively prevent the voltage abnormality of the outer shell of the battery cell 320. At the same time, it can effectively prevent welding slag from entering the interior of the pole core and prevent the battery cell 320 from thermal runaway. The battery 300 of the utility model, by injection molding the seal 40 in the terminal assembly 100, cancels the setting of the sealing ring and the insulating ring in the prior art, greatly simplifies the assembly of the battery 300, has fewer parts, and reduces the complexity of the assembly process.

[0067] Of course, for those skilled in the art, other structures of the battery 300 (eg, the battery cell 320 , the aluminum shell 310 , etc.) and its working principles are understandable and achievable, and will not be described in detail in the present invention.

[0068] According to the fourth aspect of the embodiment of the utility model, an electric device is provided, comprising the battery 300 in the above embodiment. Since the battery 300 according to the embodiment of the utility model has the above technical effects, the electric device according to the embodiment of the utility model should also have the corresponding technical effects, that is, the electric device of the utility model will not have the problem of trapped electrolyte by adopting the battery 300, and effectively prevent the voltage abnormality of the outer shell of the battery cell 320. At the same time, it can effectively prevent welding slag from entering the pole core and prevent the battery cell 320 from thermal runaway. The electric device of the utility model has few parts and is easy to assemble.

[0069] Of course, for those skilled in the art, other structures and working principles of the electrical equipment are understandable and achievable, and will not be described in detail in the present utility model.

[0070] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A terminal assembly, characterized in that: include: A base plate, wherein a mounting hole is provided on the base plate; A pole, the pole is arranged in the mounting hole, and a part of the pole extends out of the mounting hole; A ceramic ring, wherein the ceramic ring is arranged in the mounting hole and the ceramic ring is sleeved around the pole, and a mounting gap is formed between the substrate, the pole and the ceramic ring; A sealing member is an insulating material member and is arranged in the installation gap.

2. The terminal assembly according to claim 1, characterized in that: The sealing element is injection molded in the installation gap.

3. The terminal assembly according to claim 1, characterized in that: The ceramic ring has a top surface and a bottom surface which are arranged opposite to each other along its axial direction. The sealing member extends from the top surface of the ceramic ring to the bottom surface of the ceramic ring and is connected to the substrate.

4. The terminal assembly according to claim 1, characterized in that: The top surface and the bottom surface of the ceramic ring respectively form recessed parts at the parts close to the central axis of the pole, and a part of the sealing member is arranged in the recessed parts.

5. The terminal assembly according to claim 1, characterized in that: Also includes: A fixing ring is arranged on the bottom surface of the ceramic ring, and the sealing member fills the installation gap between the fixing ring and the pole.

6. The terminal assembly according to claim 5, characterized in that: Also includes: A plastic part and a connecting piece, wherein the plastic part is arranged at the bottom of the substrate, the connecting piece is located at the bottom of the plastic part, a part of the connecting piece corresponds to the position of the fixing ring, the connecting piece and the fixing ring are connected through the sealing member, and a part of the sealing member extends to the plastic part along the length direction of the substrate.

7. The terminal assembly according to claim 5, characterized in that: A portion of the sealing member extends from the bottom surface of the fixing ring along the length direction of the substrate, and the sealing member fills an installation gap formed by the fixing ring and the substrate.

8. The terminal assembly according to claim 5, characterized in that: The ceramic ring is brazed and connected to the pole and the fixing ring respectively to form an integral structural member.

9. The terminal assembly according to claim 8, characterized in that: The integral structural component is laser welded to the substrate, and the sealing component at least covers the welding mark between the integral structural component and the substrate.

10. A battery cover, characterized in that: The terminal assembly comprises the terminal assembly described in any one of claims 1 to 9.

11. A battery, characterized in that: Including the battery cover plate as claimed in claim 10.

12. An electrical equipment, characterized in that: Comprising the battery of claim 11.

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