Carbon-coated lithium-manganese dioxide battery canister mold

Abstract

The utility model belongs to lithium manganese dioxide primary battery carbon package production technical field discloses a kind of lithium manganese dioxide battery pot carbon package mould, including circular base, the positioning nail of axial protrusion is equipped in the centre of base top, the upper surface of base is equipped with large cylinder, the central through-hole is vertically provided in the centre of large cylinder, central through-hole is cylindrical, carbon package is placed in central through-hole, carbon package centre is equipped with cylindrical steel net, large cylinder is coaxially sleeved in the positioning nail outside of base and is detachably connected with base, the outer ring of base is equipped with the positioning block of protruding and is positioned to large cylinder, central through-hole is detachably equipped with solid long cylinder and solid short cylinder, solid long cylinder height is greater than solid short cylinder, large cylinder top is covered with gland, and cylindrical guide through-hole is equipped in the centre of gland;The utility model is pressed to carbon package and cylindrical steel net by solid long cylinder and solid short cylinder multiple even, so that carbon package density is balanced, and battery capacity and load capacity are improved.

Description

Technical Field

[0001] This utility model belongs to the field of lithium manganese dioxide primary battery carbon pack production technology, specifically relating to a lithium manganese dioxide battery can carbon pack mold. Background Technology

[0002] Lithium manganese dioxide primary batteries (non-rechargeable) are high-energy-density, long-life chemical power systems. Since their introduction in the 1970s, they have become one of the mainstream technologies for primary lithium batteries due to their excellent performance. Compared with other lithium batteries, lithium manganese cylindrical batteries have relatively lower material and manufacturing costs and excellent safety, so they are widely used in various fields. Consequently, the requirements for their performance (such as capacity and load) are becoming increasingly stringent.

[0003] Existing carbon pack molds mostly use a single cylindrical compactor to press the mixed carbon powder as a whole. This structure results in uneven pressure distribution during compaction, leading to a significantly higher density in the central region of the carbon pack compared to the edge regions. This density difference causes two key defects: first, insufficient utilization of active materials in the low-density areas, resulting in high battery capacity decay; second, the edge structure is prone to microcrack propagation during charging and discharging, causing localized lithium ion deposition and increased impedance, thus degrading the load capacity. Although some technical solutions attempt multi-layer segmented compaction, the complexity of the molds leads to extended production cycles, hindering the improvement of production efficiency. Therefore, there is an urgent need to develop a new type of mold that combines structural simplicity with gradient compaction efficiency to achieve balanced carbon pack density and simultaneously improve battery capacity and load capacity. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a carbon pack mold for lithium manganese dioxide battery cans, which has a simple structure, is easy to use, and effectively improves production efficiency, battery capacity and load capacity.

[0005] The technical solution adopted by this utility model is as follows: a carbon pack mold for a lithium manganese dioxide battery can, including a circular base, an axially protruding positioning pin at the center of the top of the base, a large cylinder on the upper surface of the base, a central through hole vertically opened in the center of the large cylinder, the central through hole being cylindrical, a carbon pack placed inside the central through hole, a cylindrical steel mesh at the center of the carbon pack, the large cylinder being coaxially sleeved outside the positioning pin of the base and detachably connected to the base, a protruding positioning block on the outer ring of the base for positioning the large cylinder, a solid long cylinder and a solid short cylinder detachably arranged inside the central through hole, the height of the solid long cylinder being equal to the height of the large cylinder, the height of the solid long cylinder being greater than that of the solid short cylinder, the height difference between the two being ≥50%, a pressure cap covering the top of the large cylinder, a cylindrical guide through hole at the center of the pressure cap, the diameter of the guide through hole being equal to the diameter of the solid long cylinder.

[0006] The positioning block is circular, and the difference between the inner diameter of the positioning block and the outer diameter of the large cylinder is ≤0.3mm.

[0007] The difference between the outer diameter of the tubular steel mesh and the diameter of the positioning pin is ≤0.3mm.

[0008] The gap between the solid long cylinder and the solid short cylinder and the guide hole and the center hole is ≤0.1mm.

[0009] The ratio of the height of the solid long cylinder to the height of the solid short cylinder is (5-8):1.

[0010] The ratio of the diameter of the central through hole of the large cylinder to the diameter of the positioning pin is (2.5-3.5):1.

[0011] The beneficial effects of this utility model are as follows:

[0012] This utility model has a simple structure and is easy to use. By repeatedly and evenly pressing the carbon pack and the cylindrical steel mesh with solid long cylinders and solid short cylinders, the carbon pack density is balanced, thereby improving the battery capacity and load capacity. Attached Figure Description

[0013] Figure 1 A structural diagram of the base, large cylinder, carbon pack, and pressure cap;

[0014] Figure 2 A structural diagram showing the base, large cylinder, carbon pack, pressure cap, and solid elongated cylinder;

[0015] Figure 3 This is a structural diagram of the large cylinder, carbon pack, pressure cap, and solid elongated cylinder after removing the base;

[0016] Figure 4 A schematic diagram of a structure in which a cylindrical steel mesh is placed inside a carbon bag;

[0017] Figure 5 This is a schematic diagram of a solid short cylinder pressing a carbon package.

[0018] Figure 6 This is a schematic diagram of the structure of the carbon pack after it has been pressed and removed.

[0019] The markings in the diagram are: 1. Base; 11. Positioning block; 12. Positioning pin; 2. Large cylinder; 21. Central through hole; 3. Solid long cylinder; 4. Solid short cylinder; 5. Pressure cap; 51. Guide through hole; 6. Carbon bag; 61. Tubular steel mesh. Detailed Implementation

[0020] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0021] like Figure 1-6As shown, a carbon pack mold for a lithium manganese dioxide battery can includes a circular base 1. A positioning pin 12 with an axially protruding center is located at the top of the base 1. A large cylinder 2 is located on the upper surface of the base 1. A central through hole 21 is vertically opened at the center of the large cylinder 2. The central through hole 21 is cylindrical, and a carbon pack 6 is placed inside the central through hole 21. A cylindrical steel mesh 61 is located at the center of the carbon pack 6. The difference between the outer diameter of the cylindrical steel mesh 61 and the diameter of the positioning pin 12 is 0.3 mm. The large cylinder 2 is coaxially sleeved around the positioning pin 12 of the base 1 and detachably connected to the base 1. The ratio of the diameter of the central through hole 21 of the large cylinder 2 to the diameter of the positioning pin 12 is 3:1. A protruding cylindrical positioning block is provided on the outer ring of the base 1. 11 positioning blocks 11 are used to position the large cylinder 2. The difference between the inner diameter of the positioning block 11 and the outer diameter of the large cylinder 2 is 0.3 mm. A solid long cylinder 3 and a solid short cylinder 4 are detachably provided in the central through hole 21. The height of the solid long cylinder 3 is equal to the height of the large cylinder 2, and the height of the solid long cylinder 3 is greater than that of the solid short cylinder 4. The height ratio of the solid long cylinder 3 to the solid short cylinder 4 is 7:1. A pressure cap 5 is placed on the top of the large cylinder 2. A cylindrical guide through hole 51 is provided in the center of the pressure cap 5. The diameter of the guide through hole 51 is equal to the diameter of the solid long cylinder 3. The gap between the solid long cylinder 3 and the solid short cylinder 4 and the guide through hole 51 and the central through hole 21 is ≤0.1 mm.

[0022] When using this lithium manganese dioxide battery can carbon pack mold, such as Figure 1 As shown, the large cylinder 2 is placed on the base 1, and the large cylinder 2 is fixed by the positioning block 11. The positioning pin 12 is set in the central through hole 21. The carbon pack 6 is placed in the central through hole 21, and the pressure cap 5 is closed on the top of the large cylinder 2. Figure 2 As shown, insert the solid elongated cylinder 3 into the guide hole 51, press the solid elongated cylinder 3 downwards, so that the solid elongated cylinder 3 enters the central through hole 21 to squeeze the carbon pack 6 until the top of the solid elongated cylinder 3 is flush with the top of the pressure cap 5; as shown Figure 3 As shown, invert the assembled mold so that the pressure cap 5 is at the bottom, and pull out the base 1. After pulling out the base 1, a gap will be created in the middle of the carbon pack 6, which is shaped like the positioning pin 12; Figure 4 As shown, the rolled-up cylindrical steel mesh 61 is placed into the gap shaped like the positioning pin 12 in the middle of the carbon bag 6; as shown... Figure 5 As shown, a solid short cylinder 4 is inserted into the central through hole 21 from the end of the large cylinder 2 where the carbon pack 6 is located, and the carbon pack 6 and the cylindrical steel mesh 61 are pressed until the top of the solid short cylinder 4 is flush with the top of the large cylinder 2; as shown Figure 6As shown, the mold is flipped over, and the pressure cap 5 at the top of the large cylinder 2 is installed at the bottom of the large cylinder 2. The protruding solid long cylinder 3 is pressed down, and the solid short cylinder 4 and carbon pack 6 are squeezed out from the large cylinder 2 to obtain the prepared carbon pack 6. This utility model has a simple structure and is easy to use. Through the solid long cylinder 3 and solid short cylinder 4, the carbon pack 6 and the cylindrical steel mesh 61 are pressed evenly multiple times, so that the density of the carbon pack 6 is balanced, which improves the battery capacity and load capacity.

Claims

1. A carbon pack mold for a lithium manganese dioxide battery can, comprising a circular base (1), characterized in that: The base (1) has an axially protruding positioning pin (12) at the top center. The upper surface of the base (1) has a large cylinder (2). The large cylinder (2) has a vertically opened central through hole (21) at its center. The central through hole (21) is cylindrical. A carbon pack (6) is placed inside the central through hole (21). A cylindrical steel mesh (61) is provided in the center of the carbon pack (6). The large cylinder (2) is coaxially sleeved on the outside of the positioning pin (12) of the base (1) and is detachably connected to the base (1). The outer ring of the base (1) has a protruding positioning pin. Block (11) positions the large cylinder (2). A solid long cylinder (3) and a solid short cylinder (4) are detachably provided in the central through hole (21). The height of the solid long cylinder (3) is equal to the height of the large cylinder (2). The height of the solid long cylinder (3) is greater than that of the solid short cylinder (4). The height difference between the two is ≥50%. A pressure cap (5) is closed on the top of the large cylinder (2). A cylindrical guide through hole (51) is provided in the center of the pressure cap (5). The diameter of the guide through hole (51) is equal to the diameter of the solid long cylinder (3).

2. The lithium manganese dioxide battery can carbon pack mold according to claim 1, characterized in that: The positioning block (11) is annular, and the difference between the inner diameter of the positioning block (11) and the outer diameter of the large cylinder (2) is ≤0.3mm.

3. The lithium manganese dioxide battery can carbon pack mold according to claim 1, characterized in that: The difference between the outer diameter of the tubular steel mesh (61) and the diameter of the positioning pin (12) is ≤0.3mm.

4. The lithium manganese dioxide battery can carbon pack mold according to claim 1, characterized in that: The gap between the solid long cylinder (3) and the solid short cylinder (4) and the guide through hole (51) and the center through hole (21) is ≤0.1mm.

5. The lithium manganese dioxide battery can carbon pack mold according to claim 1, characterized in that: The ratio of the height of the solid long cylinder (3) to the height of the solid short cylinder (4) is (5-8):

1.

6. The lithium manganese dioxide battery can carbon pack mold according to claim 1, characterized in that: The ratio of the diameter of the central through hole (21) of the large cylinder (2) to the diameter of the positioning pin (12) is (2.5-3.5):1.

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