Top cover structure and battery

Abstract

The utility model provides a top cover structure and a battery, and relates to the technical field of batteries. The utility model provides a cover plate structure, including pole, top cover body and adapter piece, the adapter piece is provided on the lower surface of top cover body, on the adapter piece is provided with the hollow cooperation groove, and the lower pole below the mounting hole is connected with the adapter piece, and the lower pole is cooperatively arranged in the hollow cooperation groove. Compared with a double-layer structure in which the lower pole is connected with the upper surface of the switching piece in the prior art, the hollow matching groove is formed in the switching piece, and the prior art is changed into a single-layer structure in which the lower pole is connected with the hollow matching groove of the switching piece, so that the occupied space in the battery is reduced, and the space utilization rate in the battery is improved; meanwhile, the hollow matching groove is formed in the adapter piece, so that the structure of the adapter piece is changed, the used material area of the adapter piece is reduced, and the manufacturing cost is reduced.

Description

Top cover structure and battery Technical Field

[0001] This utility model relates to the field of battery technology, and more specifically, to a top cover structure and a battery. Background Technology

[0002] In existing technology, a secondary battery includes at least a top cover, a battery cell, and an adapter plate. The top cover assembly includes at least a terminal post, and the battery cell includes at least a tab. The tab of the battery cell and the adapter plate are first connected by ultrasonic welding, and then the adapter plate is laser welded to the terminal post of the top cover assembly, thereby achieving the connection between the battery cell and the top cover. The lower terminal post of the top cover is a rectangular metal block, and the adapter plate is connected to this metal block by laser welding.

[0003] Among these, the lower electrode metal block occupies the internal volume of the battery cell, thus reducing the space utilization rate of the battery cell; at the same time, both the lower electrode and the adapter are made of metal materials, which are heavy and have high manufacturing costs. Summary of the Invention

[0004] The purpose of this utility model is to provide a top cover structure and a battery that can reduce the space occupied inside the battery and improve the space utilization rate inside the battery.

[0005] The embodiments of this utility model can be implemented as follows:

[0006] In a first aspect, this utility model provides a top cover structure, comprising:

[0007] The electrode post includes a lower electrode post and an electrode post plate connected together;

[0008] The top cover body has mounting holes, the lower pole passes through the mounting holes and is connected to the top cover body, and the pole plate is located on the upper surface of the top cover body.

[0009] An adapter piece is disposed on the lower surface of the top cover body. The adapter piece has a hollow mating groove. The lower pole located below the mounting hole is connected to the adapter piece, and the lower pole is mated in the hollow mating groove.

[0010] In an optional embodiment, the lower surface of the lower electrode post is flush with the lower surface of the adapter piece.

[0011] In an optional embodiment, the adapter includes a first body and a second body connected to each other. The first body is connected to the electrode tab, and the second body is connected to the lower electrode post. The second body is provided with a hollow mating groove, which is a hole-like structure.

[0012] In an optional embodiment, the adapter includes a first body and two second bodies connected to each other. The first body is connected to the tab, and the two second bodies are spaced apart. The two second bodies are located on the first side of the first body, and the two second bodies and the first side of the first body form the hollow mating groove.

[0013] In an optional embodiment, the adapter includes a first body and a second body connected to each other. The first body is connected to the electrode tab, and the second body is connected to the lower electrode post. The second body is disposed on a first side of the first body, and the hollow mating groove is located on the first side of the first body.

[0014] In an optional embodiment, the bottom of the lower pole post is provided with a groove, and the second body is fitted into the groove.

[0015] In an optional embodiment, the lower pole post includes at least a lower pole post with a cylindrical structure, a lower pole post with a cuboid structure, and a column with a polygonal cross-section.

[0016] In an optional embodiment, the top cover body includes a cover plate and a lower plastic, the lower plastic being disposed below the cover plate, and the mounting hole including a first mounting hole and a second mounting hole coaxially disposed, the first mounting hole being disposed on the cover plate, and the second mounting hole being disposed on the lower plastic.

[0017] The lower electrode post passes through the first mounting hole and the second mounting hole in sequence and is sealed to the cover plate and the lower plastic, with the electrode post plate located on the upper surface of the cover plate.

[0018] In an optional implementation, the electrode comprises two, one of which is a positive electrode and the other is a negative electrode;

[0019] The top cover body is provided with two spaced-apart mounting holes, and the positive terminal and the negative terminal are respectively connected to the two mounting holes.

[0020] Secondly, this utility model provides a battery, including the top cover structure described in any of the foregoing embodiments.

[0021] The beneficial effects of the top cover structure and battery provided in this embodiment of the utility model include:

[0022] Compared to the existing double-layer structure where the lower electrode post and the upper surface of the adapter plate are connected, this application changes the existing technology to a single-layer structure where the lower electrode post and the adapter plate are connected by a hollow fitting groove in the adapter plate. This reduces the space occupied inside the battery and improves the space utilization rate inside the battery. At the same time, setting a hollow fitting groove on the adapter plate changes the structure of the adapter plate, reduces the material area used in the adapter plate, and reduces manufacturing costs. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 is a schematic diagram of the first structure of the top cover body provided in this embodiment;

[0025] Figure 2 is a schematic diagram of the first structure of the adapter plate provided in this embodiment;

[0026] Figure 3 is a schematic diagram of the first structure of the top cover structure provided in this embodiment;

[0027] Figure 4 is a schematic diagram of the second structure of the top cover body provided in this embodiment;

[0028] Figure 5 is a schematic diagram of the second structure of the adapter plate provided in this embodiment;

[0029] Figure 6 is a schematic diagram of the second structure of the top cover structure provided in this embodiment.

[0030] Icons: 100 - Cover plate structure; 110 - Pole post; 111 - Lower pole post; 112 - Groove; 120 - Top cover body; 121 - Cover plate; 122 - Lower plastic; 123 - Injection hole; 130 - Adapter piece; 131 - Hollow mating groove; 132 - First body; 133 - Second body. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0032] 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 claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0033] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0034] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0035] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0036] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0037] The following describes in detail the overall structure, working principle, and technical effects of the cover plate structure 100 provided by this utility model through embodiments and in conjunction with the accompanying drawings.

[0038] Please refer to Figures 3 and 6. The cover structure 100 provided by this utility model is applied to a battery. The battery can be a single battery cell or a secondary battery. The battery can be cylindrical, flat, cuboid, or other shapes.

[0039] This utility model proposes a battery, which includes a top cover structure, a shell, and bare cells; the bare cells are housed in the shell, the top cover structure is disposed at the open end of the shell, and the cover plate 121 of the top cover structure is welded and sealed to the shell.

[0040] Referring to Figures 3 and 6, this utility model proposes a cover plate structure 100, comprising:

[0041] The pole post 110 includes a lower pole post 111 and a pole post 110 plate connected together;

[0042] The top cover body 120 has mounting holes, the lower pole post 111 passes through the mounting holes and is connected to the top cover body 120, and the pole post 110 is limited to the upper surface of the top cover body 120.

[0043] The adapter piece 130 is disposed on the lower surface of the top cover body 120. The adapter piece 130 is provided with a hollow mating groove 131. The lower pole post 111 located below the mounting hole is connected to the adapter piece 130 and is mated in the hollow mating groove 131.

[0044] Understandably, compared to the prior art, this application changes the double-layer structure of the lower electrode post 111 and the upper surface of the adapter piece 130 in the prior art to a single-layer structure in which the lower electrode post 111 and the hollow mating groove 131 of the adapter piece 130 are connected by setting a hollow mating groove 131 in the adapter piece 130. This reduces the space occupied inside the battery and improves the space utilization rate inside the battery. At the same time, setting a hollow mating groove 131 on the adapter piece 130 changes the structure of the adapter piece 130, reduces the material area used in the adapter piece 130, and reduces manufacturing costs.

[0045] In this embodiment, the cover plate structure 100 includes a pole post 110.

[0046] In this embodiment, referring to Figures 1 and 4, the pole post 110 includes a lower pole post 111 and a pole post 110 plate connected together, with the pole post 110 plate disposed on top of the lower pole post 111. The lower pole post 111 and the pole post 110 plate are integrally formed.

[0047] Optionally, the lower pole post 111 may include at least a cylindrical lower pole post 111, a cuboid lower pole post 111, and a column with a polygonal cross-section.

[0048] In this embodiment, there are two terminals 110, one of which is a positive terminal and the other is a negative terminal. The positive terminal is connected to the positive tab of the bare battery cell through an adapter piece 130, and the negative terminal is also connected to the negative tab of the bare battery cell through an adapter piece 130.

[0049] In this embodiment, the cover structure 100 includes a top cover body 120.

[0050] In this embodiment, referring to Figures 1 and 4, the top cover body 120 includes a cover plate 121 and a lower plastic 122. The lower plastic 122 is disposed below the cover plate 121. The mounting holes include a first mounting hole and a second mounting hole coaxially disposed. The first mounting hole is disposed on the cover plate 121, and the second mounting hole is disposed on the lower plastic 122. The lower electrode post 111 passes through the first mounting hole and the second mounting hole in sequence and is sealed and connected to the cover plate 121 and the lower plastic 122. The electrode post 110 is limited to the upper surface of the cover plate 121.

[0051] In this case, the cover plate 121 is welded to the open end of the shell, and the lower plastic 122 is supported between the bottom of the cover plate 121 and the bare battery cell.

[0052] The top cover body 120 is also provided with an injection hole 123 for injecting electrolyte.

[0053] In this embodiment, the top cover has two first mounting holes relative to the positive and negative terminals, and the lower plastic 122 also has two second mounting holes relative to the positive and negative terminals. The lower terminals 111 of both the positive and negative terminals pass through the first and second mounting holes sequentially and are sealed to the cover plate 121 and the lower plastic 122. The terminal 110 is confined to the upper surface of the cover plate 121.

[0054] Optionally, the top cover structure also includes an upper plastic, which is sleeved on the lower pole post 111 and sealed between the bottom of the pole post 110 plate and the upper surface of the cover plate 121.

[0055] In this embodiment, the top cover structure includes an adapter piece 130.

[0056] In this embodiment, referring to Figures 3 and 6, the adapter piece 130 is disposed on the lower surface of the top cover body 120. The adapter piece 130 is provided with a hollow mating groove 131. The lower pole post 111 located below the mounting hole is connected to the adapter piece 130. The lower pole post 111 is mated in the hollow mating groove 131, and the lower surface of the lower pole post 111 is flush with the lower surface of the adapter piece 130.

[0057] Understandably, the lower surface of the lower electrode post 111 is flush with the lower surface of the adapter piece 130, which can further improve the space utilization inside the battery.

[0058] In one embodiment, referring to Figures 1-3, the adapter piece 130 includes a first body 132 and a second body 133 connected to each other. The first body 132 is connected to the electrode tab, and the second body 133 is connected to the lower electrode post 111. A hollow mating groove 131 is provided on the second body 133. The hollow mating groove 131 has a hole-like structure.

[0059] Furthermore, the hollow mating groove 131 with the perforated structure is mated and connected to the lower pole post 111 with the cylindrical structure.

[0060] In one embodiment, the adapter piece 130 includes a first body 132 and two second bodies 133 connected to each other. The first body 132 is connected to the electrode tab, and the two second bodies 133 are spaced apart. The two second bodies 133 are located on the first side of the first body 132, and the two second bodies 133 and the first side of the first body 132 form a rectangular hollow mating groove 131.

[0061] Furthermore, the rectangular hollow fitting groove 131 is fitted and connected to the lower pole post 111 of the cuboid structure.

[0062] In one embodiment, referring to Figures 4-6, the adapter piece 130 includes a first body 132 and a second body 133 connected to each other. The first body 132 is connected to the electrode tab, and the second body 133 is connected to the lower electrode post 111. The second body 133 is disposed on the first side of the first body 132, and the hollow mating groove 131 is located on the first side of the first body 132.

[0063] Furthermore, the bottom of the lower pole post 111 is provided with a groove 112, and the second body 133 is fitted into the groove 112.

[0064] If the groove 112 has a "C" shaped structure, then the lower pole post 111 can be a cuboid structure that is compatible with the "C" shaped structure.

[0065] In summary, the cover plate structure 100 provided in this embodiment of the present invention, compared with the double-layer structure in the prior art where the lower electrode post 111 and the upper surface of the adapter piece 130 are connected, is a single-layer structure in which the lower electrode post 111 and the adapter piece 130 are connected by a hollow mating groove 131 provided in the adapter piece 130. This reduces the space occupied inside the battery and improves the space utilization rate inside the battery. At the same time, the hollow mating groove 131 provided on the adapter piece 130 changes the structure of the adapter piece 130, reduces the material area used in the adapter piece 130, and reduces manufacturing costs.

[0066] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A top cover structure, characterized in that, include: The electrode post includes a lower electrode post and an electrode post plate connected together; a top cover body has a mounting hole, through which the lower electrode post passes and is connected to the top cover body, and the electrode post plate is located on the upper surface of the top cover body; an adapter piece is disposed on the lower surface of the top cover body, and has a hollow mating groove, through which the lower electrode post located below the mounting hole is connected to the adapter piece, and the lower electrode post is mated within the hollow mating groove.

2. The top cover structure according to claim 1, characterized in that, The lower surface of the lower electrode post is flush with the lower surface of the adapter plate.

3. The top cover structure according to claim 1, characterized in that, The adapter plate includes a first body and a second body connected to each other. The first body is connected to the electrode tab, and the second body is connected to the lower electrode post. The second body is provided with a hollow mating groove, which is a hole-like structure.

4. The top cover structure according to claim 1, characterized in that, The adapter plate includes a first body and two second bodies connected to each other. The first body is connected to the electrode tab, and the two second bodies are spaced apart. The two second bodies are located on the first side of the first body, and the two second bodies and the first side of the first body form the hollow mating groove.

5. The top cover structure according to claim 1, characterized in that, The adapter plate includes a first body and a second body connected to each other. The first body is connected to the electrode tab, and the second body is connected to the lower electrode post. The second body is disposed on the first side of the first body, and the hollow mating groove is located on the first side of the first body.

6. The top cover structure according to claim 5, characterized in that, The bottom of the lower pole post is provided with a groove, and the second body is fitted into the groove.

7. The top cover structure according to claim 1, characterized in that, The lower pole includes at least a lower pole with a cylindrical structure, a lower pole with a cuboid structure, and a column with a polygonal cross-section.

8. The top cover structure according to claim 1, characterized in that, The top cover body includes a cover plate and a lower plastic part, the lower plastic part being disposed below the cover plate. The mounting holes include a first mounting hole and a second mounting hole coaxially disposed, the first mounting hole being disposed on the cover plate and the second mounting hole being disposed on the lower plastic part. The lower electrode post passes through the first mounting hole and the second mounting hole in sequence and is sealed and connected to the cover plate and the lower plastic part. The electrode post plate is limited to the upper surface of the cover plate.

9. The top cover structure according to claim 1, characterized in that, The electrode includes two, one of which is a positive electrode and the other is a negative electrode; the top cover body is provided with two spaced-apart mounting holes, and the positive electrode and the negative electrode are respectively connected to the two mounting holes.

10. A battery, characterized in that, Includes the top cover structure as described in any one of claims 1-9.

Images