Cover plate for cylindrical battery

Abstract

The utility model discloses a cover plate for a cylindrical battery, which comprises a cover plate main body, the outer wall of the cover plate main body is movably sleeved with an outer sleeve, the outer wall of the cover plate main body is provided with external threads close to the bottom end, and the outer walls of the left and right curved surfaces of the cover plate main body are provided with driven blocks extending into the outer sleeve. A stroke groove is formed in the contact position of the inner wall of the outer sleeve and the driven block, and multiple sets of restraining blocks are fixed to the outer walls of the front curved surface and the rear curved surface of the cover plate body. According to the utility model, the cover plate and the cylindrical battery shell are aligned through the external threads, so that the cover plate main body and the cylindrical battery shell are in a coaxial state, and then the battery shell and the curved surface outer wall of the outer sleeve are welded, so that the integrity of welding sealing is ensured; and when an external object is in contact with the pole on the cover plate main body, the constraint block can extrude the elastic sheet to sink downwards, so that buffering elastic protection is achieved, and the cover plate main body is prevented from sinking downwards and deforming.

Description

Technical Field

[0001] This utility model relates to the field of battery cover technology, specifically a cover for cylindrical batteries. Background Technology

[0002] Cylindrical batteries hold an important position in the market due to their high versatility, mature manufacturing process, and stable performance. The positive and negative terminals of a cylindrical battery are typically located at both ends of the battery casing, and both terminals are connected to a core inside the casing to enable the charging and discharging function of the cylindrical battery.

[0003] Cylindrical batteries mainly consist of components such as a casing, a cover plate, a core, a negative current collector, and a positive current collector. The bottom of the casing is open, and the cover plate is located at the bottom of the casing to close the bottom opening. The core, the negative current collector, and the positive current collector are all installed inside the casing.

[0004] Typically, the cover plate and the housing need to be welded together for fixation. Since both the cover plate and the housing are circular in shape, they are prone to misalignment, causing them to be out of sync. This can lead to issues such as incomplete welding or over-welding during the welding process, which seriously affects the quality of production. Therefore, a cover plate for cylindrical batteries is proposed. Utility Model Content

[0005] Therefore, the purpose of this utility model is to provide a cover plate for cylindrical batteries to solve the technical problems mentioned in the background.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a cover plate for a cylindrical battery, comprising a cover plate body, an outer sleeve movably fitted onto the outer wall of the cover plate body, an external thread being provided on the outer wall of the cover plate body near the bottom end, driven blocks extending into the outer sleeve being provided on the left and right curved outer walls of the cover plate body, a travel groove being provided at the contact position between the inner wall of the outer sleeve and the driven block, a plurality of constraint blocks being fixed at the positions of the front and rear curved outer walls of the cover plate body, an arc groove being provided at the contact position between the inner wall of the outer sleeve and the constraint block, and elastic sheets being fitted on the lower inner wall of the arc groove at the lower bottom end of the constraint block.

[0007] As a preferred technical solution for a cover plate for a cylindrical battery according to this utility model, the bottom end of the elastic sheet is fixed to the inner wall of the arc groove.

[0008] As a preferred technical solution for a cover plate for a cylindrical battery according to this utility model, the top end of the outer sleeve is fixed with a ring piece, and the top end of the cover plate body is fixed with a ring strip that contacts the inner wall of the curved surface of the ring piece.

[0009] As a preferred technical solution for a cover plate for a cylindrical battery according to this utility model, the lower half of the outer diameter of the outer sleeve is equal to the inner diameter of the cylindrical battery casing.

[0010] As a preferred technical solution for a cover plate for a cylindrical battery according to this utility model, the upper half outer diameter of the outer sleeve is equal to the outer diameter of the cylindrical battery casing.

[0011] As a preferred technical solution for a cover plate for a cylindrical battery according to this utility model, the bottom end of the cover plate body is provided with an installation groove, a connecting column is fixed longitudinally in the installation groove, and a current collector is movably sleeved on the outer wall of the connecting column.

[0012] In summary, the present invention has the following main advantages:

[0013] This utility model uses external threads to align the cover plate and the cylindrical battery casing with a standard, so that the cover plate body and the cylindrical battery casing are in a coaxial state. Then, the curved outer wall of the battery casing and the outer sleeve are welded to ensure the integrity of the weld seal. When an external object comes into contact with the pole on the cover plate body, the constraint block will squeeze the elastic sheet downward and indent it, which will play a buffering and elastic protection role and prevent the cover plate body from deforming downward. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a bottom view of the structure of this utility model;

[0016] Figure 3 This is a bottom view of the outer casing of this utility model;

[0017] Figure 4 This is a structural diagram of the outer jacket and ring plate of this utility model;

[0018] Figure 5 This is a structural diagram of the cover plate of this utility model.

[0019] In the diagram: 100, cover plate body; 101, mounting groove; 102, ring bar;

[0020] 110. Outer sleeve; 111. External thread; 112. Stroke groove; 113. Arc groove; 114. Elastic plate; 115. Ring plate; 120. Collector plate; 130. Connecting post; 140. Constraint block; 150. Driven block. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0022] The embodiments of this utility model will be described below based on its overall structure.

[0023] like Figures 1 to 5 As shown, this utility model provides a cover plate for a cylindrical battery, including a cover plate body 100, an outer sleeve 110 movably sleeved on the outer wall of the cover plate body 100, an external thread 111 near the bottom of the outer wall of the cover plate body 100, driven blocks 150 extending into the outer sleeve 110 on the left and right curved outer walls of the cover plate body 100, a stroke groove 112 at the contact position between the inner wall of the outer sleeve 110 and the driven block 150, a plurality of constraint blocks 140 fixed at the front and rear curved outer walls of the cover plate body 100, an arc groove 113 at the contact position between the inner wall of the outer sleeve 110 and the constraint block 140, and elastic sheets 114 are fitted on the lower inner wall of the arc groove 113 at the lower bottom end of the constraint block 140.

[0024] The bottom end of the cover plate body 100 is provided with an installation groove 101, and a connecting column 130 is fixed longitudinally in the installation groove 101. A collection plate 120 is movably sleeved on the outer wall of the connecting column 130.

[0025] The cylindrical battery casing has an internal thread that matches the external thread 111 pre-drilled in the port. When the cover plate and the cylindrical battery casing are docked, an external force is applied to the cover plate body 100 to rotate. Under the constraint of the stroke groove 112, the driven block 150 will drive the outer sleeve 110 to rotate synchronously. At this time, the outer sleeve 110 of the outer wall will rotate into the battery casing, so that the cover plate body 100 and the cylindrical battery casing are in a coaxial state. Then, the curved outer walls of the battery casing and the outer sleeve are welded to ensure the integrity of the weld seal.

[0026] Furthermore, when an external object comes into contact with the terminal post on the cover body 100, the cover body 100 will descend linearly within the outer sleeve 110. At this time, the constraint block 140 will squeeze the elastic sheet 114 downwards, providing buffering and elastic protection to prevent the cover body 100 from deforming downwards. Meanwhile, the connecting post 130 will move downwards within the current collector 120, preventing the current collector 120 from being squeezed or deformed, thus ensuring the normal use of the cylindrical battery.

[0027] Please refer to this carefully. Figure 3 and Figure 4 The bottom end of the elastic sheet 114 is fixed to the lower inner wall of the arc groove 113.

[0028] When the blocking and restraining block 140 is lowered, it can deform by indenting downwards, so that the cover plate body 100 can be provided with a certain elastic protection when subjected to external force.

[0029] Please refer to this carefully. Figure 1 and Figure 4The top of the outer jacket 110 is fixed with a ring piece 115, and the top of the cover plate body 100 is fixed with a ring strip 102 that contacts the inner wall of the curved surface of the ring piece 115.

[0030] The ring plate 115 and the ring bar 102 work together to block the gap between the cover body 100 and the outer sleeve 110, preventing external dust and moisture from directly intruding.

[0031] Please refer to this carefully. Figure 1 The lower half of the outer diameter of the outer sleeve 110 is equal to the inner diameter of the cylindrical battery casing, and the upper half of the outer diameter of the outer sleeve 110 is equal to the outer diameter of the cylindrical battery casing.

[0032] Ensure that the outer sleeve 110 is fitted onto the end of the cylindrical battery casing, so that the two are coaxial, and ensure the weld is sealed.

[0033] In use, the cylindrical battery casing has an internal thread that matches the external thread 111 pre-drilled at the port. When the cover plate and the cylindrical battery casing are docked, an external force of rotation is applied to the cover plate body 100. Under the constraint of the stroke groove 112, the driven block 150 will drive the outer sleeve 110 to rotate synchronously. At this time, the outer sleeve 110 of the outer wall will rotate into the battery casing, so that the cover plate body 100 and the cylindrical battery casing are in a coaxial state. Then, the curved outer wall of the battery casing and the outer sleeve is welded to ensure the integrity of the weld seal.

[0034] Furthermore, when an external object comes into contact with the terminal post on the cover body 100, the cover body 100 will descend linearly within the outer sleeve 110. At this time, the constraint block 140 will squeeze the elastic sheet 114 downwards, providing buffering and elastic protection to prevent the cover body 100 from deforming downwards. Meanwhile, the connecting post 130 will move downwards within the current collector 120, preventing the current collector 120 from being squeezed or deformed, thus ensuring the normal use of the cylindrical battery.

[0035] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A cover plate for a cylindrical battery, comprising a cover plate body (100), characterized in that: The outer wall of the cover plate body (100) is movably fitted with an outer sleeve (110). The outer wall of the cover plate body (100) near the bottom end is provided with an external thread (111). The left and right curved outer walls of the cover plate body (100) are provided with driven blocks (150) extending into the outer sleeve (110). The inner wall of the outer sleeve (110) is provided with a stroke groove (112) at the contact position with the driven block (150). Multiple sets of constraint blocks (140) are fixed at the front and rear curved outer walls of the cover plate body (100). The inner wall of the outer sleeve (110) is provided with an arc groove (113) at the contact position with the constraint block (140). The lower inner wall of the arc groove (113) is equipped with an elastic sheet (114) at the lower bottom end of the constraint block (140).

2. A cover plate for a cylindrical battery according to claim 1, characterized in that: The bottom end of the elastic sheet (114) is fixed to the lower inner wall of the arc groove (113).

3. A cover plate for a cylindrical battery according to claim 1, characterized in that: The top end of the outer jacket (110) is fixed with a ring piece (115), and the top end of the cover plate body (100) is fixed with a ring strip (102) that contacts the inner wall of the curved surface of the ring piece (115).

4. A cover plate for a cylindrical battery according to claim 1, characterized in that: The lower half of the outer diameter of the outer casing (110) is equal to the inner diameter of the cylindrical battery casing.

5. A cover plate for a cylindrical battery according to claim 1, characterized in that: The upper half of the outer diameter of the outer jacket (110) is equal to the outer diameter of the cylindrical battery casing.

6. A cover plate for a cylindrical battery according to claim 1, characterized in that: The bottom end of the cover plate body (100) is provided with an installation groove (101), and a connecting column (130) is fixed longitudinally in the installation groove (101). A collection plate (120) is movably sleeved on the outer wall of the connecting column (130).

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