Closing-up tool and closing-up method for double-layer shell built-in battery

Abstract

The invention relates to a double-layer shell built-in battery closing tool and a closing method. The problems that an existing closed closing mold cannot reserve a fire transfer channel and lead output is prone to damage are solved. A charging barrel (3-2) is assembled on a base (3-1), an inner battery to be closed is placed, a core column (3-5) is pressed on a built-in cover plate (1-1), positive and negative electrode outgoing line output lines (1-4) are vertically attached to the periphery of the core column (3-5), a bending tool (3-3) is arranged on the core column (3-5) in a sleeving mode, an inclined angle (3-3-1) of the bending tool (3-3) is pressed on the outer wall of an inner shell (1-6), and the edge of the inner shell (1-6) is bent; and the bending tool (3-3) is taken down, the core column (3-5) is sleeved with the flat pressing tool (3-4), and the edge of the bent inner shell (1-6) is pressed to be flat (2-2-1). The structure of the battery bundle is reinforced and the output lead is fixed after the inner battery is closed up, the lead is protected from being damaged during closing up, and an ignition channel is reserved after closing up.

Description

Technical Field

[0001] This invention belongs to the field of pyrotechnic thermal battery technology, specifically relating to a double-layer shell internal battery sealing tool and sealing method. Background Technology

[0002] To adapt to the intelligent development of artillery-launched ammunition weapon systems, thermal batteries need to withstand high overload environments after activation and operate normally. Conventional thermal battery structures cannot meet this requirement. Therefore, a double-shell reinforced battery bundle design with an inner battery retraction structure is adopted. This design maintains a stable battery bundle structure after activation, ensuring normal output under high overload conditions. The design structure is shown in Figure A. During thermal battery assembly, the inner battery is pre-reinforced and inserted into the outer shell. The outer cover is then pressed into the outer shell and sealed by argon arc welding. The existing thermal battery retraction mold is shown in Figure B.

[0003] Existing sealing methods and molds are not suitable for sealing internal batteries, resulting in the following bottlenecks: 1. The internal battery's sealing design is for reinforcing the battery bundle structure, requiring the provision of a fire transmission channel and a channel for fixing the battery lead output. Existing sealing methods achieve airtight preservation of the thermal battery, resulting in a closed casing, which cannot be applied to the sealing of the internal battery.

[0004] 2. The existing sealing method aims to achieve airtight preservation of the thermal battery. The sealing mold's function is to cut and press the outer cover into the outer shell, making the cover flush with the shell opening. The inner battery pre-sealing is a structural design to reinforce the battery bundle, requiring the preservation of a fire transmission channel and a channel for fixing the battery bundle's lead output. Existing closed sealing molds cannot provide this fire transmission channel and lead output, making them prone to damage. Summary of the Invention

[0005] This invention provides a double-layer casing internal battery sealing tooling and method, solving the problems of existing closed sealing molds failing to reserve a ignition channel and easily damaging lead outputs. It achieves structural reinforcement of the battery bundle and fixation of the output leads after the internal battery is sealed, protects the leads from damage during sealing, and retains the ignition channel after sealing.

[0006] This invention is achieved through the following technical solutions: A double-layer casing battery packing tooling includes a base 3-1, a material cylinder 3-2, a bending tooling 3-3, a flat pressing tooling 3-4, and a core column 3-5; The bending fixture 3-3 and the flattening fixture 3-4 are annular cylindrical shapes. The lower end of the bending fixture 3-3 has an outwardly flared inclined angle 3-3-1. The flattening fixture 3-4 has a stepped hole that is smaller at the top and larger at the bottom. The diameter of the larger hole 3-4-1 at the bottom is equal to the outer diameter of the inner battery casing 1-6. The barrel 3-2 has a stepped hole that is smaller at the top and larger at the bottom. The diameter of the bending fixture 3-3 at its maximum inclined angle, the large hole 3-4-1 of the flattening fixture 3-4, and the diameter of the smaller hole at the bottom of the barrel 3-2 are all equal to the outer diameter of the inner battery casing 1-6. The outer diameters of the bending fixture 3-3 and the flat pressing fixture 3-4 are equal to the diameter of the large hole at the upper end of the barrel 3-2. The wall thickness of the annular column of the bending fixture 3-3 and the flat pressing fixture 3-4 is 2-2-2 the width of the pressing edge of the inner shell 1-6 of the inner battery. The outer diameter of the core column 3-5 is larger than the center hole of the inner cover plate 1-1 of the inner battery. A gap is reserved between the core column 3-5 and the center hole of the bending fixture 3-3 and the flat pressing fixture 3-4 for the output line 1-4 of the positive and negative leads of the battery bundle.

[0007] The material cylinder 3-2 and the base 3-1 are designed as separate units.

[0008] A method for closing the inner battery in a double-layer shell involves assembling a material cylinder 3-2 onto a base 3-1, placing the inner battery to be closed inside, pressing a core post 3-5 onto an inner cover plate 1-1, and vertically attaching positive and negative lead-out wires 1-4 around the core post 3-5. A bending fixture 3-3 is then fitted onto the core post 3-5, with the inclination angle 3-3-1 of the bending fixture 3-3 pressing against the outer wall of the inner shell 1-6, bending the edge of the inner shell 1-6. The bending fixture 3-3 is then removed, and a flattening fixture 3-4 is fitted onto the core post 3-5, applying pressure to flatten the bent edge of the inner shell 1-6 by 2-2-1.

[0009] Compared with existing technologies, the advantages of this invention are: 1. The inner shell 1-6 is bent and closed from its side edge, longitudinally fixing the battery bundle 1-7; the battery bundle 1-7 is assembled in the inner shell, and the battery bundle 1-7 is protected laterally by the inner shell. This achieves both lateral and longitudinal fixation of the battery bundle 1-7, enhancing the structural strength of the battery bundle 1-7.

[0010] 2. The inner battery pre-sealing fixture adopts a ring-shaped columnar structure. During sealing, the core post 3-5 is placed in the center of the ring-shaped column, protecting the integrity of the output lead insert assembly 1-5. The core post 3-5 presses on the inner cover plate 1-1. As the inner cover plate 1-1 moves down, the bending fixture 3-3 presses the edge of the inner shell to achieve an inward tilt at a certain angle 2-1-1. The battery bundle 1-7 is subjected to balanced force around its perimeter and edges.

[0011] 3. The base 3-1 and the barrel 3-2 are designed as separate parts. When the inner battery is pre-closed, pressure is applied to the inner shell 1-6. The inner shell 1-6 expands and deforms in all directions under pressure, and the gap between the inner battery and the barrel 3-2 becomes smaller. The barrel 3-2 and the base 3-1 are designed as separate parts. After closing, the base 3-1 can be taken out first, and the inner battery can be gently pushed out using the pre-pressure column.

[0012] 4. The inner cover plate 1-1 is a ring structure with an outer diameter that is the same as that of the battery bundle 1-7. The output lead 1-4 of the battery bundle 1-7 can be led out and fixed from the outside of the inner cover plate 1-1. The central hole of the inner cover plate 1-1 is used for ignition transmission after ignition. Attached Figure Description

[0013] Figure A. Overload thermal battery design structure diagram; Figure B is a structural diagram of the closing mold described in the background art; Figure 1 A schematic diagram showing the status of the internal batteries after the battery bundle is assembled. Figure 2 A schematic diagram showing the retracted state of the internal battery. Figure 2-1 The state of the internal battery after pre-compression by the bending fixture. Figure 2-2 Internal battery status after voltage equalization Figure 2-3 yes Figure 2-2 Enlarged view of a specific area; Figure 3 Schematic diagram of the internal battery sealing mold structure; in, Figure 3-1 Bending fixture 3-3 structural diagram; Figure 3-2 Structural diagram of the flat pressing tool 3-4. Detailed Implementation

[0014] Reference Figure 1 , Figure 2 The internal battery consists of an internal cover plate 1-1, an ignition strip 1-2, an ignition plate 1-3, positive and negative output leads 1-4, a insert assembly 1-5, an inner shell 1-6, and a battery bundle 1-7. The inner shell 1-6 is bent and closed from its side edge, longitudinally fixing the battery bundle 1-3; the battery bundle 1-3 is laterally protected by the inner shell 1-6. This achieves both lateral and longitudinal fixation of the battery bundle 1-3, enhancing its structural strength. Simultaneously, the output leads of the battery bundle 1-3 are pressed against the internal cover plate 1-1 along the edge of the inner shell 1-2, ensuring the leads of the battery bundle 1-3 are fixedly output from the inner shell 1-2. The internal cover plate 1-1 adopts a ring-shaped structure design, reliably ensuring the ignition channel (Figure A).

[0015] Reference Figure 3The inner battery pre-sealing fixture adopts a ring-shaped columnar structure. During sealing, the core column 3-5 is placed in the center of the ring-shaped column, protecting the integrity of the output lead insert assembly 1-5. The core column 3-5 presses against the inner cover plate 1-1. As the inner cover plate 1-1 moves downward, the bending die 3-3 presses the edge of the inner shell 1-6 to achieve an inward tilt at a certain angle 2-1-1. The flat pressing fixture 3-4 is fitted onto the core column 3-5, applying pressure to the bent edge of the inner shell 1-6, flattening it under the action of the flat pressing angle 3-4-1 2-2-1. The battery bundle 1-7 experiences balanced force at its center and edges. This inner battery pre-sealing die achieves the sealing mode of bending and wrapping the edge of the inner battery shell 1-6 around the ring-shaped inner cover plate 1-1.

[0016] Example: The inner battery (see Figure A) is pre-fixed and closed by folding down the upper edge of the inner casing 1-6 to secure the battery bundle 1-7. The battery bundle 1-7 is inserted into the inner casing 1-6 in sequence. The positive and negative output leads 1-4 are straightened and fixed in the middle of the insert 1-5. The inner cover 1-1 is placed into the inner casing, and the output leads 1-4 are pressed against the inner wall of the inner casing 1-6 by the inner cover 1-1. A closing fixture is used (see...). Figure 3 The inner housing 1-6 is bent along its edge onto the annular inner cover 1-1, while the battery bundle 1-7 output lead is also bent along the edge of the inner housing 1-6 onto the inner cover 1-1, thus fixing the battery bundle 1-7 lead 1-4 out of the inner housing 1-6. The inner cover 1-1 adopts an annular structure design, reliably ensuring the ignition channel (see Figure A). The inner housing 1-6, to achieve the upper edge bending, can be made of high-quality carbon structural thin steel plate.

[0017] The internal battery closing fixture design provided in this embodiment consists of a base 3-1, a material cylinder 3-2, a bending fixture 3-3, a flat pressing fixture 3-4, and a core column 3-5. The material cylinder 3-2, bending fixture 3-3, and flat pressing fixture 3-4 are annular cylindrical shapes, while the core column 3-5 is a cylindrical body. The material cylinder 3-2 is assembled onto the base 3-1, and the internal battery to be closed is placed inside. Figure 1 Press the core post 3-5 onto the inner cover plate 1-1, and vertically attach the positive and negative lead-out wires 1-4 around the core post 3-5. Place the bending fixture 3-3 onto the core post 3-5, with the inclination angle 3-3-1 of the bending fixture 3-3 pressing against the outer wall of the inner shell 1-6, bending the edge of the inner shell 1-6 by 2-1-1; remove the bending fixture 3-3, and place the flattening fixture 3-4 onto the core post 3-5, applying pressure to flatten the bent edge of the inner shell 1-6 by 2-2-1.

[0018] The outer diameter of the annular columnar shape of bending fixture 3-3 and flat pressing fixture 3-4 is designed to match the inner diameter of the barrel 3-2. The wall thickness of the annular columnar shape of bending fixture 3-3 and flat pressing fixture 3-4 is 2-2-2 times the width of the pressing edge of the inner shell 1-6. The outer diameter of the core column 3-5 is larger than the center hole of the inner cover plate 1-1. The space between the core column 3-5 and bending fixture 3-3 and flat pressing fixture 3-4 is reserved for the output lines 1-4 of the positive and negative leads of the battery bundle.

[0019] After pre-compression by bending fixture 3-3, the inner battery state 2-1 is achieved by bending the edge of the inner shell at a certain angle 2-1-1, and bending the edge of the inner shell 1-6 inward 2-1-1, while simultaneously fixing the height of the battery bundle 1-7 and ensuring the tightness of the battery bundle 1-7. After pre-compression by flat pressing fixture 3-4, the inner battery state 2-2 is achieved by pressing the bent edge of the inner shell 1-6 onto the inner cover plate 1-1, thus achieving longitudinal fixation of the battery bundle 1-7.

Claims

1. A tooling for sealing a battery inside a double-layered casing, characterized in that: The components include a base (3-1), a barrel (3-2), a bending fixture (3-3), a flat pressing fixture (3-4), and a core (3-5). The bending fixture (3-3) and the flat pressing fixture (3-4) are annular cylindrical. The lower end of the bending fixture (3-3) has an outwardly flared inclined angle (3-3-1). The flat pressing fixture (3-4) has a stepped hole that is smaller at the top and larger at the bottom. The diameter of the larger hole (3-4-1) at the bottom is equal to the outer diameter of the inner casing (1-6) of the battery. The barrel (3-2) has a stepped hole that is smaller at the top and larger at the bottom. The diameter at the maximum inclined angle of the bending fixture (3-3), the large hole (3-4-1) of the flat pressing fixture (3-4), and the barrel (3-5) are all within the same diameter range. 3-2) The diameter of the small holes at the bottom is equal to the outer diameter of the inner shell of the battery (1-6). The outer diameter of the bending fixture (3-3) and the flat pressing fixture (3-4) is equal to the diameter of the large hole at the top of the barrel (3-2). The wall thickness of the annular column of the bending fixture (3-3) and the flat pressing fixture (3-4) is equal to the width of the pressing edge of the inner shell of the battery (1-6) (2-2-2). The outer diameter of the core column (3-5) is larger than the center hole of the inner cover plate (1-1) of the battery. The gap between the core column (3-5) and the center hole of the bending fixture (3-3) and the flat pressing fixture (3-4) is reserved for the output line (1-4) of the positive and negative leads of the battery bundle.

2. The double-layer casing battery packing fixture according to claim 1, characterized in that: The barrel (3-2) and the base (3-1) are designed as separate parts.

3. A method for sealing a battery inside a double-layered casing, characterized in that: Using the tooling described in claim 1 or 2, specifically: assemble the barrel (3-2) onto the base (3-1), place the inner battery to be closed into it, press the core column (3-5) onto the inner cover plate (1-1), and vertically attach the positive and negative lead-out wires (1-4) around the core column (3-5). Place the bending tooling (3-3) onto the core column (3-5), and press the inclination angle (3-3-1) of the bending tooling (3-3) onto the outer wall of the inner shell (1-6), bending the edge of the inner shell (1-6). Remove the bending tooling (3-3), place the flat pressing tooling (3-4) onto the core column (3-5), and apply pressure to flatten the bent edge of the inner shell (1-6) (2-2-1).

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