A strong sealing lithium battery steel shell structure
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ANHUI MINGXING NEW ENERGY TECHNOLOGY CO LTD
- Filing Date
- 2025-08-18
- Publication Date
- 2026-08-07
AI Technical Summary
[0003]现有锂电池钢壳顶端开口的密封，一般采用焊接配合密封环完成锂电池钢壳顶端开口的密封，由于锂电池的发热和内部有机溶剂的腐蚀，密封圈可能会受到损坏，从而影响锂电池钢壳顶端开口的密封效果
[0014]该改进型锂电池钢壳使用时，可通过钢筒顶部的形变配合套环和盖帽，形成环形波浪状的卡合结构，以极大增强钢筒顶端与盖帽之间的连接强度，并通过钢筒与盖帽对密封垫的挤压，形成多重密封阻隔结构，以极大增强钢筒顶部与盖帽之间的密封强度，盖帽与盖帽之间的连接强度较强，且锂电池钢壳顶端开口密封效果较好。
Smart Images
Figure CN224609961U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of lithium battery steel shells, and specifically to a highly sealed lithium battery steel shell structure. Background Technology
[0002] Lithium batteries are rechargeable batteries that primarily store and release electrical energy by the movement of lithium ions between the positive and negative electrodes. The steel casing of a lithium battery is an important component, and its top is usually sealed with a welded cap.
[0003] The sealing of the top opening of the existing lithium battery steel casing is generally achieved by welding and using a sealing ring. However, due to the heat generated by the lithium battery and the corrosion of internal organic solvents, the sealing ring may be damaged, thus affecting the sealing effect of the top opening of the lithium battery steel casing. Utility Model Content
[0004] Therefore, the technical problem to be solved by this utility model is to provide a highly sealed lithium battery steel shell structure, which can greatly enhance the connection strength between the steel cylinder and the cap, and the sealing strength of the opening at the top of the lithium battery steel shell is relatively strong.
[0005] To solve the above problems, this utility model provides a highly sealed lithium battery steel shell structure, including: a steel cylinder, the top opening of which is provided with a cap, and the cap is I-shaped, and the outer peripheral wall of the middle part of the cap is wavy.
[0006] A sealing gasket is fixedly installed on the outer peripheral wall of the middle part of the cap. A collar is sleeved on the outer peripheral side of the sealing gasket, and the inner ring wall of the collar is in contact with the outer wall of the sealing gasket.
[0007] The conductive mechanism, located inside the cap, is used to connect the positive electrode of the lithium battery to the outside.
[0008] Preferably, the outer ring edges on both the upper and lower sides of the collar are fixedly connected to the outer wall of the steel cylinder, and the top end of the steel cylinder is fixedly connected to the cap.
[0009] Preferably, the collar is divided into two semi-circular arc-shaped plates, and both ends of the two arc-shaped plates are fixed by welding.
[0010] Preferably, the conductive mechanism includes a mounting hole located at the axial center of the cap, through which a conductive rod is inserted. A soft pad is provided in the bottom opening of the mounting hole, and the top side of the soft pad is fixedly connected to the inner wall of the mounting hole. The bottom side of the soft pad is in contact with the conductive rod.
[0011] Preferably, a conductive sheet is fixedly installed at the top of the cap, and a conductive block is fixedly inserted inside the conductive sheet, and the conductive block and the conductive rod are integrally cast together.
[0012] Preferably, the conductive rod is threaded to the inner wall of the mounting hole, and a hexagonal hole is provided on the bottom side of the conductive rod.
[0013] This utility model has the following beneficial effects:
[0014] When this improved lithium battery steel casing is used, the deformation of the top of the steel cylinder, combined with the collar and cap, forms a ring-shaped interlocking structure, which greatly enhances the connection strength between the top of the steel cylinder and the cap. The compression of the sealing gasket by the steel cylinder and the cap forms a multi-layer sealing barrier structure, which greatly enhances the sealing strength between the top of the steel cylinder and the cap. The connection strength between the caps is strong, and the sealing effect of the opening at the top of the lithium battery steel casing is good. Attached Figure Description
[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0016] Figure 1 This is a perspective view of the overall structure of this utility model;
[0017] Figure 2 This is a front view of the internal structure of part of the steel shell and cap of this utility model;
[0018] Figure 3 This is a perspective view of the collar of this utility model;
[0019] Figure 4 This is a perspective view of the conductive rod and conductive disk of this utility model after being inverted.
[0020] The reference numerals in the attached figures are as follows:
[0021] 1. Steel cylinder; 2. Cap; 3. Sealing gasket; 4. Collar; 41. Arc plate; 5. Conductive mechanism; 51. Mounting hole; 52. Conductive rod; 53. Soft pad; 54. Conductive sheet; 55. Conductive block; 56. Hexagonal hole. Detailed Implementation
[0022] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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.
[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0024] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0025] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.
[0026] See also Figure 1 and Figure 2 As shown, according to an embodiment of the present invention, a strongly sealed lithium battery steel shell structure is provided, including: a steel cylinder 1, the top opening of which is provided with a cap 2, and the cap 2 is I-shaped, and the outer peripheral wall of the middle part of the cap 2 is wavy.
[0027] The sealing gasket 3 is fixedly installed on the outer peripheral wall of the middle part of the cap 2. The outer peripheral side of the sealing gasket 3 is fitted with a collar 4, and the inner ring wall of the collar 4 is in contact with the outer wall of the sealing gasket 3.
[0028] The conductive mechanism 5, located inside the cap 2, is used for the connection between the positive electrode of the lithium battery and the outside.
[0029] In this embodiment, when the improved lithium battery steel shell is used, the installation of the conductive mechanism 5 inside the cap 2 and the connection between the conductive mechanism 5 and the lithium battery body are first completed. Then, the lithium battery body is inserted into the steel cylinder 1. Subsequently, the cap 2 is inserted into the top opening of the steel cylinder 1. Then, the collar 4 is put on the top of the steel cylinder 1 so that the top of the steel shell is deformed by the collar 4 and tightly fitted with the sealing gasket 3 to form a multi-layer sealing barrier structure to seal the gap between the cap 2 and the steel shell.
[0030] When this improved lithium battery steel shell is used, the deformation of the top of the steel cylinder 1, combined with the collar 4 and the cap 2, forms a ring-shaped interlocking structure, which greatly enhances the connection strength between the top of the steel cylinder 1 and the cap 2. The compression of the sealing gasket 3 by the steel cylinder 1 and the cap 2 forms a multi-layer sealing barrier structure, which greatly enhances the sealing strength between the top of the steel cylinder 1 and the cap 2. The connection strength between the caps 2 is relatively strong, and the sealing effect of the opening at the top of the lithium battery steel shell is good.
[0031] In a further preferred embodiment of this utility model, such as Figure 1 and Figure 2 As shown, the outer ring edges on both the upper and lower sides of the collar 4 are fixedly connected to the outer wall of the steel cylinder 1, and the top of the steel cylinder 1 is fixedly connected to the cap 2.
[0032] In this embodiment, please refer to Figure 1 and Figure 2 As shown, the I-shaped structure of the cap 2 and the collar 4 cooperate to form a ring-shaped clamping and engaging structure, which further enhances the connection strength between the steel shell and the cap 2.
[0033] The top of the steel cylinder 1 and the cap 2 are connected by welding, which further enhances the sealing strength of the connection between the steel cylinder 1 and the cap 2.
[0034] In a further preferred embodiment of this utility model, such as Figure 1 and Figure 2 As shown, the collar 4 is divided into two semi-circular arc-shaped plates 41, and both ends of the two arc-shaped plates 41 are fixed by welding.
[0035] In this embodiment, please refer to Figure 1 , Figure 2 and Figure 3 As shown, when installing the collar 4, the existing hydraulic push structure is used to drive the two arc plates 41 to move towards each other on the outer periphery of the cap 2. The arc plates 41, together with the cap 2, clamp the top wall of the steel cylinder 1, causing the top of the steel cylinder 1 to bend and deform in a corresponding shape. This results in the top of the steel cylinder 1 forming a ring-shaped wave structure that fits tightly against the sealing gasket 3. Finally, the ends of the two arc plates 41 are welded together to complete the installation of the collar 4. The assembly of the lithium battery steel shell is relatively convenient.
[0036] In a further preferred embodiment of this utility model, such as Figure 1 , Figure 2 and Figure 4 As shown, the conductive mechanism 5 includes a mounting hole 51, which is opened at the axial position of the cap 2, and a conductive rod 52 is inserted inside it. A soft pad 53 is provided in the bottom opening of the mounting hole 51, and the top side of the soft pad 53 is fixedly connected to the inner wall of the mounting hole 51, and the bottom side of the soft pad 53 is in contact with the conductive rod 52.
[0037] In this embodiment, (please refer to...) Figure 2 and Figure 3 As shown, conductive rod 52 is T-shaped. Please refer to... Figure 1 , Figure 2 and Figure 4 As shown, by pressing the soft pad 53 with the conductive rod 52, a sealing structure with a relatively large thickness can be formed, and the sealing strength between the conductive rod 52 and the inner wall of the mounting hole 51 is relatively strong.
[0038] The lithium battery body is electrically connected to the conductive rod 52 via existing connecting wires or connecting plates.
[0039] In a further preferred embodiment of this utility model, such as Figure 2 and Figure 4 As shown, a conductive sheet 54 is fixedly installed at the top of the cap 2, and a conductive block 55 is fixedly inserted inside the conductive sheet 54. The conductive block 55 and the conductive rod 52 are integrally cast together.
[0040] In this embodiment, (the conductive block 55 and the conductive sheet 54 are fixedly connected by welding, and the conductive sheet 54 and the cap 2 are fixedly connected by welding). Please refer to... Figure 2 and Figure 4 As shown, the conductive rod 52, conductive sheet 54 and conductive block 55 cooperate with each other to form an I-shaped locking structure that abuts against and locks against the cap 2, thereby making the connection between the conductive rod 52 and the cap 2 more stable.
[0041] In a further preferred embodiment of this utility model, such as Figure 1 , Figure 2 and Figure 4 As shown, the conductive rod 52 is threaded to the inner wall of the mounting hole 51, and a hexagonal hole 56 is provided on the bottom side of the conductive rod 52.
[0042] In this embodiment, please refer to Figure 1 , Figure 2 and Figure 4As shown, when assembling the conductive mechanism 5 and the cap 2, the conductive sheet 54 is first welded to the corresponding position on the top of the cap 2. Then, a hex wrench is inserted into the hexagonal hole 56. Subsequently, the conductive rod 52 is rotated by the hex wrench and screwed into the mounting hole 51. The soft pad 53 is squeezed with a strong force against the inner wall of the mounting hole 51, thereby deforming the soft pad 53 to form a surface that is completely in contact with the inner wall of the mounting hole 51 and the conductive rod 52. The sealing effect between the conductive rod 52 and the inner wall of the mounting hole 51 is good.
[0043] It should be noted that, due to the pushing action of the soft pad 53 on the conductive rod 52 after deformation, the external thread of the conductive rod 52 is tightly fitted with the thread on the inner wall of the mounting hole 51 to form a multi-seal structure, which further enhances the sealing strength between the conductive rod 52 and the inner wall of the mounting hole 51.
[0044] During the process of screwing the conductive rod 52 into the mounting hole 51, the conductive block 55 is pushed into the conductive sheet 54 together. After the conductive rod 52 completes the compression of the soft pad 53, the conductive block 55 and the conductive sheet 54 are connected and fixed by welding, so that the conductive rod 52, the conductive block 55 and the conductive sheet 54 are connected to form a whole.
[0045] Working principle: When using this improved lithium battery steel shell, first screw the conductive rod 52 into the mounting hole 51, and complete the welding between the conductive sheet 54 and the cap 2 and between the conductive sheet 54 and the conductive block 55, so as to form a multi-layer sealing barrier structure between the conductive rod 52 and the inner wall of the mounting hole 51, and complete the stable sealing of the gap between the conductive rod 52 and the cap 2.
[0046] The conductive rod 52 is connected to the lithium battery body via a connecting wire or conductive sheet 54. The lithium battery body is inserted into the steel cylinder 1 and the cap 2 is inserted into the top opening of the steel cylinder 1. Then, two arc-shaped plates 41 are fitted onto the outer periphery of the cap 2 using the existing hydraulic pushing structure, and the two arc-shaped plates 41 are spliced together. Finally, the two arc-shaped plates 41 are welded and fixed. With the help of the sealing gasket 3, a multi-layer sealing barrier structure is formed between the top opening of the steel cylinder 1 and the cap 2 to stably seal the gap between the inner wall of the top opening of the steel cylinder 1 and the cap 2. Finally, the top of the steel cylinder 1 and the cap 2 are welded together to further enhance the sealing strength of the top opening of the steel cylinder 1.
[0047] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.
[0048] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model. The above are only preferred embodiments of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.
Claims
1. A highly sealed lithium battery steel shell structure, characterized in that, include: A steel cylinder (1) has a cap (2) inside its top opening, and the cap (2) is I-shaped. The outer peripheral wall of the middle part of the cap (2) is wavy. A sealing gasket (3) is fixedly installed on the outer peripheral wall of the middle part of the cap (2). A collar (4) is sleeved on the outer peripheral side of the sealing gasket (3), and the inner ring wall of the collar (4) is in contact with the outer wall of the sealing gasket (3). The conductive mechanism (5), which is located inside the cap (2), is used for the connection between the positive electrode of the lithium battery and the outside.
2. The strongly sealed lithium battery steel shell structure according to claim 1, characterized in that: The outer ring edges on both the upper and lower sides of the collar (4) are fixedly connected to the outer wall of the steel cylinder (1), and the top of the steel cylinder (1) is fixedly connected to the cap (2).
3. The strongly sealed lithium battery steel shell structure according to claim 2, characterized in that: The collar (4) is divided into two semi-circular arc plates (41), and both ends of the two arc plates (41) are fixed by welding.
4. The strongly sealed lithium battery steel shell structure according to claim 3, characterized in that: The conductive mechanism (5) includes a mounting hole (51) located at the axial center of the cap (2), through which a conductive rod (52) is inserted. A soft pad (53) is provided in the bottom opening of the mounting hole (51), and the top side of the soft pad (53) is fixedly connected to the inner wall of the mounting hole (51). The bottom side of the soft pad (53) is in contact with the conductive rod (52).
5. The strongly sealed lithium battery steel shell structure according to claim 4, characterized in that: The top of the cap (2) is fixedly equipped with a conductive sheet (54), and a conductive block (55) is fixedly inserted inside the conductive sheet (54). The conductive block (55) and the conductive rod (52) are integrally cast together.
6. The strongly sealed lithium battery steel shell structure according to claim 5, characterized in that: The conductive rod (52) is threaded to the inner wall of the mounting hole (51), and a hexagonal hole (56) is provided on the bottom side of the conductive rod (52).