Battery cover plate assembly, cylindrical battery and battery module

Abstract

A battery cover plate assembly, a cylindrical battery and a battery module, by setting a first pole and a second pole at one end of the cover plate body, and the first pole includes an insulating column fixed on the cover plate body and a connecting column arranged in the center of the insulating column, the connecting column passes through the insulating column and is connected with the battery cell inside the cover plate body, and the outer end surface of the connecting column and the outer end surface of the second pole are flush; when assembling, the first pole and the second pole are fixed tightly with the corresponding bus bar, when the bus bar is connected with the connecting column and the second pole respectively through the corresponding fixed screw, it can be connected and grouped conveniently and quickly, and the first pole and the second pole are flush, which ensures the depth of the threaded hole on the cover plate body, avoids the falling phenomenon after using the fixed bolt, avoids the virtual welding phenomenon during welding and fixation, and ensures the welding firmness.

Description

Technical Field

[0001] This utility model belongs to the field of battery technology, and specifically relates to a battery cover assembly, a cylindrical battery, and a battery module. Background Technology

[0002] In the assembly process, battery packs or battery modules need to be connected in series and parallel by welding one busbar at the top and another busbar at the bottom to form a battery pack or battery module.

[0003] In the same-side busbar scheme, two busbars are arranged on the same side to improve integration and reduce processing steps. However, due to the height difference between the top surface of the cover plate and the pole on the cover plate, incomplete welding and weak welding may occur during the same-side busbar process.

[0004] Furthermore, in the technical approach of using bolts for simple assembly, the existing cover plate body is relatively thin, the depth of the threaded holes on the cover plate body is insufficient, and it is easy for it to fall off after being connected with bolts.

[0005] Utility model announcement CN219892283U discloses a battery cover assembly, a cylindrical battery and battery module assembly, and a cylindrical battery and battery module. The key technical features include a cover and terminals. The terminals are fixedly mounted on the cover, and a mounting hole is provided at the centerline of the terminal. A hot-melt plastic column is fixedly installed inside the mounting hole, extending beyond the top surface of the terminal. The hot-melt column passes through a connection hole on the busbar and is used to fix the terminal to the busbar via hot-melt welding. The main function is to use the hot-melt column to deform and cool the battery cover assembly, thereby pressing and fixing the busbar and terminals, achieving a rapid connection between the busbar and terminals.

[0006] The utility model disclosed in announcement number CN223193888U discloses a cylindrical battery cover, a single battery cell, and an electrical device. The key technical points of the cylindrical battery cover include a cover body, which includes a top cover and a bottom cover. The top cover is located above the bottom cover. The top cover is a plate structure made of aluminum and is used for welding with the busbar. The bottom cover is a plate structure made of steel and is used for welding with the battery casing of the single battery cell. The surface of the battery cover is made of aluminum, which has the same melting point as the busbar when welding, thus improving the yield of welding between the cylindrical battery cover and the busbar. However, there is still a height difference between the top surface of the cover body and the terminal post on the cover body, which can still cause incomplete welding.

[0007] Therefore, improvements are still needed to the results of the cylindrical battery cover. Summary of the Invention

[0008] The purpose of this utility model is to address the shortcomings of the prior art by providing a battery cover assembly, a cylindrical battery, and a battery module, thereby improving the firmness of the contact between the busbar and the terminal post and thus enhancing the product's durability.

[0009] To solve the above technical problems, the technical solution adopted by this utility model is as follows: A battery cover assembly includes a cover body and terminals, wherein the terminals protrude from the cover body and include a first terminal and a second terminal. The first electrode post includes an insulating post fixed to the cover plate body and a connecting post disposed at the core of the insulating post, and the connecting post passes through the insulating post and is connected to the battery cell located inside the cover plate body. The outer end face of the connecting column and the outer end face of the second pole column are arranged flush with each other. During assembly, the first and second poles are tightly attached to the corresponding busbars.

[0010] The core of both the connecting post and the second pole post has threaded holes for connecting to the busbar. The busbar is connected to the connecting post and the second pole post by corresponding fixing screws.

[0011] The first and second poles are welded and fixed to the corresponding busbars.

[0012] The height of the protruding cover plate body of the pole post is 1~4mm.

[0013] A cylindrical battery includes a casing, a battery cell, and a battery cover assembly. The battery cell is disposed inside the casing, the battery cover assembly is disposed at one end of the casing, and the cover body is fixedly connected to the casing. The terminals are electrically connected to the tabs at the ends of the battery cells.

[0014] A battery module comprising multiple cylindrical batteries.

[0015] The beneficial effects of this utility model are: (1) The battery cover assembly, cylindrical battery and battery module are provided with a first pole and a second pole protruding from one end of the cover body. The first pole includes an insulating pole fixed on the cover body and a connecting pole located in the core of the insulating pole. The connecting pole passes through the insulating pole and is connected to the battery cell located inside the cover body. The outer end face of the connecting pole and the outer end face of the second pole are flush. During assembly, the first pole and the second pole are tightly fixed to the corresponding busbar. When the busbar is connected to the connecting pole and the second pole by the corresponding fixing screws, it can be easily and quickly connected and assembled. The first pole and the second pole are flush, ensuring the depth of the threaded hole on the cover body and avoiding the phenomenon of falling off after the fixing bolt is used for connection.

[0016] (2) When the first pole and the second pole are fixed to the corresponding busbar by welding, the first pole and the second pole are flush and protruding, and the busbar can be closely attached to the first pole and the second pole to avoid the phenomenon of false welding, ensure the welding firmness, and also avoid the phenomenon of falling off during vibration, and the product is durable. Attached Figure Description

[0017] Figure 1 This is a perspective view of the present invention; Figure 2 This is a top view of the present invention; Figure 3 This is a cross-sectional view of the battery cover assembly; Figure 4 This is a schematic diagram of the structure of the present invention using a threaded connection; Figure 5 This is a schematic diagram of the structure of the present invention using a threaded connection; Detailed Implementation

[0018] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0019] This utility model provides a battery cover assembly, a cylindrical battery, and a battery module, such as... Figures 1 to 5 As shown.

[0020] A battery cover assembly includes a cover body 1 and terminals. The terminals protrude from the cover body 1 and include a first terminal 2 and a second terminal 3. The first terminal 2 includes an insulating post 21 fixed to the cover body 1 and a connecting post 22 disposed at the center of the insulating post 21. The connecting post 22 passes through the insulating post 21 and connects to a battery cell located inside the cover body 1. The outer end face of the connecting post 22 and the outer end face of the second terminal 3 are flush. During assembly, the first terminal 2 and the second terminal 3 are tightly fixed to their respective busbars. The busbars correspondingly include a first busbar 5 and a second busbar 6.

[0021] To facilitate quick connection, the core of the connecting post 22 and the second pole post 3 can be provided with threaded holes 7 for connection with the busbar. The busbar is connected to the connecting post 22 and the second pole post 3 by corresponding fixing screws 4, which facilitates quick connection and assembly. The first pole post 2 and the second pole post 3 are arranged flush to ensure the depth of the threaded holes on the cover plate body and avoid the phenomenon of falling off after the connection is made with fixing bolts.

[0022] In addition, the first pole 2 and the second pole 3 can also be fixed to the corresponding busbar by welding. Since the first pole and the second pole are arranged at the same level, the busbar can be closely attached to the first pole and the second pole, avoiding the phenomenon of incomplete welding and ensuring a firm weld.

[0023] In this embodiment, the height of the pole post protruding from the cover plate body can be set to 1~4mm.

[0024] A cylindrical battery includes a casing, a battery cell, and a battery cover assembly. The battery cell is disposed inside the casing, the battery cover assembly is disposed at one end of the casing, and the cover body is fixedly connected to the casing. The terminals are electrically connected to the tabs at the ends of the battery cells.

[0025] A battery module includes multiple cylindrical batteries stacked together. The cylindrical batteries use the aforementioned battery cover assembly. When multiple cylindrical batteries are connected in series and parallel, they can be tightly attached to the first and second terminals via a busbar to prevent poor soldering. The welding is firm and can also prevent detachment during vibration, resulting in a durable product.

[0026] Both the connecting post and the second pole post have threaded holes for connecting to the busbar. The busbar is connected to the connecting post and the second pole post by corresponding fixing screws, which can be used to quickly connect and assemble them.

[0027] If this patent uses terms such as "first" and "second" to define components, those skilled in the art should know that the use of "first" and "second" is merely for the convenience of describing this utility model and simplifying the description, and the above terms have no special meaning.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

[0029] In the description of this utility model, it should be understood that the terms "front", "rear", "left", "right", "center", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to facilitate the description of this utility model and simplify 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. Therefore, they should not be construed as limiting the scope of protection of this utility model.

Claims

1. A battery cover assembly, comprising a cover body and terminal posts, characterized in that: The pole post protrudes from the cover plate body and includes a first pole post and a second pole post; The first electrode post includes an insulating post fixed to the cover plate body and a connecting post disposed at the core of the insulating post, and the connecting post passes through the insulating post and is connected to the battery cell located inside the cover plate body. The outer end face of the connecting column and the outer end face of the second pole column are arranged flush with each other. During assembly, the first and second poles are tightly attached to the corresponding busbars.

2. The battery cover assembly according to claim 1, characterized in that: The core of both the connecting post and the second pole post has threaded holes for connecting to the busbar. The busbar is connected to the connecting post and the second pole post by corresponding fixing screws.

3. The battery cover assembly according to claim 1, characterized in that: The first and second poles are welded and fixed to the corresponding busbars.

4. A battery cover assembly according to claim 1, characterized in that: The height of the protruding cover plate body of the pole post is 1~4mm.

5. A cylindrical battery, characterized in that: The battery includes a housing, a battery cell, and a battery cover assembly as described in any one of claims 1 to 4, characterized in that: the battery cell is disposed inside the housing, the battery cover assembly is disposed at one end of the housing, and the cover body is fixedly connected to the housing, and the terminal post is electrically connected to the tab at the end of the battery cell.

6. A battery module, characterized in that: It includes multiple cylindrical batteries as described in claim 5.

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