Battery with micro-roller groove structure

Abstract

The utility model discloses a battery, especially relate to a battery with micro -rolling groove structure, including roll core, casing, positive pole current collector, negative pole current collector, fixed ring and cap, the inner chamber for accommodating roll core is provided to casing, and the inner wall of casing is provided with the protruding at least one end, positive pole current collector and negative pole current collector are fixed respectively in the both ends of roll core, and fixed ring sets up in the inner chamber of casing, and realizes axial positioning through protruding, and the side of cap is provided with sealing washer to fixed ring, and fixed ring and sealing washer structure form seal, the battery with micro -rolling groove structure disclosed by the utility model can avoid the situation that the roll groove is too deep and extrudes roll core to occur, and can guarantee sealing effect.

Description

Technical Field

[0001] This utility model relates to a battery, and more particularly to a battery with a micro-groove structure. Background Technology

[0002] Currently, most cylindrical batteries use a grooved sealing process; see appendix for details. Figure 1 The existing cylindrical battery 100 uses a groove 105 structure on the surface of the battery casing 101 to fix the internal core 102. Simultaneously, the groove 105 structure is used to compress the rubber ring 104 on the pressure cap 103, achieving a sealing effect at the opening. See appendix. Figure 2 The disadvantages of this sealing method are: the grooved sealing structure occupies a large amount of space inside the battery casing, resulting in a smaller core height and reduced cell capacity. Furthermore, the excessive deformation of the casing caused by the grooved structure can damage the surface plating, leading to nickel loss, and in severe cases, even casing breakage due to excessive deformation and stretching at the grooved area. Since the grooved structure also supports the rubber ring 104, simply reducing the depth of the groove 105 will reduce the contact area between the rubber ring 104 and the groove 105, hindering the compression of the rubber ring 104 and potentially causing leakage. Utility Model Content

[0003] In order to overcome the shortcomings of the existing technology, this utility model provides a battery with a micro-groove structure.

[0004] To achieve the above objectives, this utility model discloses a battery with a micro-groove structure, comprising: Core; A housing; the housing is provided with an inner cavity for accommodating a winding core, and at least one end of the inner wall of the housing is provided with a protrusion; A positive current collector and a negative current collector, which are respectively fixed to both ends of the winding core; A retaining ring; the retaining ring is disposed in the inner cavity of the housing and is axially positioned by a protrusion; A cap; a sealing ring is provided on the side of the cap facing the fixing ring, and the fixing ring and the sealing ring form a seal.

[0005] Preferably, the protrusion extends in a circumferential direction.

[0006] Preferably, the protrusion is formed by rolling the shell, forming a protrusion on the inner wall of the shell and a groove on the outer wall of the shell.

[0007] Preferably, the plane where the highest point of the protrusion in the first direction is located is defined as plane A, and the plane where the lowest point of the protrusion in the first direction is located is defined as plane B. The end of the core near the fixing ring is flush with plane A; plane A is the positioning plane of the fixing ring.

[0008] Preferably, the housing extends from the end near the protrusion to the end face of the cap.

[0009] Preferably, the sealing ring covers the entire lower surface of the cap and extends from the edge of the cap to the upper surface of the cap.

[0010] Preferably, the height of the fixing ring is defined as H, and the height of the positive current collector / negative current collector is defined as h, where H > h.

[0011] This utility model has the following technical effects: (1) In this device, the depth of the existing rolling groove is reduced, which reduces the space occupied inside the housing; at the same time, it avoids the loss of nickel caused by the extrusion of the core during rolling.

[0012] (2) The fixing ring can be made of stainless steel, iron ring, POM, nylon, PP and other materials that are resistant to electrolyte corrosion and relatively hard. The traditional sealing technology achieves sealing by squeezing the sealing ring into the groove to form a protrusion. The contact area between the sealing ring and the protrusion is small, which affects the sealing performance. This device introduces a fixing ring. The sealing ring and the fixing ring squeeze to achieve sealing, which increases the contact area when the sealing ring is compressed and ensures the sealing effect. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of an existing battery; Figure 2 for Figure 1 Structural sectional view; Figure 3 This is a schematic diagram of the structure of this utility model; Figure 4 This is an enlarged view of the structure of this utility model; Figure 5 This is a schematic diagram of the assembly of the fixing ring of the battery described in this utility model before it is encapsulated. Figure 6 This is a schematic diagram of the assembly of the battery in the encapsulation cavity and the fixing ring according to the present invention.

[0014] In the diagram, 100. Existing cylindrical battery; 101. Battery casing; 102. Internal winding core; 103. Cover; 104. Rubber ring; 105. Groove; 200. Core; 210. Housing; 211. Protrusion; 212. Groove; 220. Positive current collector; 230. Negative current collector; 240. Retaining ring; 250. Cap; 251. Sealing ring; Detailed Implementation

[0015] The principles and features of this utility model are described below with reference to the embodiments; the examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0016] Example 1 A battery with a micro-groove structure includes a core 200, a casing 210, a positive current collector 220, a negative current collector 230, a retaining ring 240, and a cap 250.

[0017] The housing 210 is cylindrical and has an inner cavity for accommodating the core 200. The two ends of the housing 210 are the positive and negative ends, respectively. At least one end of the inner wall of the housing 210 has a protrusion 211; specifically, in this embodiment, the protrusion 211 is located on the inner wall of the housing 210 near the positive end. The positive current collector 220 and the negative current collector 230 are respectively placed at both ends of the core 200 and distributed within the inner cavity of the housing 210 along with the core 200. The positive current collector 220 and the negative current collector 230 are fixed to the core 200 by laser welding. The protrusion 211 is formed by rolling the housing 210; at the rolling point of the housing 210, a groove 212 is formed on the outer wall of the housing 210, and a protrusion 211 is formed on the inner wall of the housing 210. The cross-section of protrusion 211 is nearly semi-circular. For ease of explanation, the axial direction of housing 210 is defined as the first direction. The plane where the highest point of protrusion 211 is located in the first direction is plane A, and the plane where the lowest point of protrusion 211 is located in the first direction is plane B. The plane of core 200 near the positive end is flush with plane A, and the plane of core 200 near the positive end is covered with high-temperature adhesive tape. The width of the tape on the positive end plane is greater than the width of the retaining ring 240. Protrusion 211 extends circumferentially. Retaining ring 240 is disposed inside housing 210 and is axially positioned by protrusion 211, i.e., the bottom surface of retaining ring 240 is flush with plane A, and then fixed to the inner wall of housing 210 by welding. A sealing ring 251 is provided on the side of cap 250 facing retaining ring 240. The sealing ring 251 covers the entire lower surface of cap 250 and extends from the edge of cap 250 to the top of cap 250. When the cap 250 is fixed to the housing 210, the sealing ring 251 is pressed onto the fixing ring 240 to form a seal.

[0018] Example 2 Compared with Embodiment 1, the difference in this embodiment lies in the specific definition of the height of the fixing ring 240. The height of the fixing ring 240 is defined as H, and the height of the positive current collector 220 / negative current collector 230 is defined as h, where H > h.

[0019] By limiting the height of the positive current collector 220 or the negative current collector 230, it is possible to prevent the sealing ring 251 from preferentially contacting the positive current collector 220 or the negative current collector 230 during installation, thus affecting the sealing performance.

[0020] This patent does not limit the shape of the positive current collector or the negative current collector; the positive current collector and the negative current collector can be any existing form of positive current collector and negative current collector.

[0021] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A battery with a micro-groove structure, characterized in that, include: Core (200); Housing (210); the housing (210) is provided with an inner cavity for receiving a core (200), and at least one end of the inner wall of the housing (210) is provided with a protrusion (211). A positive current collector (220) and a negative current collector (230) are respectively fixed to both ends of the winding core (200); Fixing ring (240); The fixing ring (240) is disposed in the inner cavity of the housing (210) and is axially positioned by a protrusion (211); Cap (250); a sealing ring (251) is provided on the side of the cap (250) facing the fixing ring (240), and the fixing ring (240) and the sealing ring (251) form a seal.

2. The battery with a micro-groove structure according to claim 1, characterized in that, The protrusion (211) extends in a circle along the circumference.

3. The battery with a micro-groove structure according to claim 1, characterized in that, The protrusion (211) is formed by rolling the shell (210), forming a protrusion (211) on the inner wall of the shell (210) and a groove (212) on the outer wall of the shell (210).

4. The battery with a micro-groove structure according to claim 1, characterized in that, The plane at the highest point of the protrusion (211) in the first direction is defined as plane A, and the plane at the lowest point of the protrusion (211) in the first direction is defined as plane B. The end of the core (200) near the fixing ring (240) is flush with plane A; plane A is the positioning plane of the fixing ring (240).

5. The battery with a micro-groove structure according to claim 1, characterized in that, The housing (210) extends from one end near the protrusion (211) to the end face of the cap (250).

6. The battery with a micro-groove structure according to claim 1, characterized in that, The sealing ring (251) covers the entire lower surface of the cap (250) and extends from the edge of the cap (250) to the upper surface of the cap (250).

7. The battery with a micro-groove structure according to claim 1, characterized in that, The height of the fixed ring (240) is defined as H, and the height of the positive current collector (220) / negative current collector (230) is defined as h, where H > h.

Images