Soft package battery edge folding device

Abstract

The utility model relates to the technical field of soft package battery preparation, and discloses a soft package battery edge folding device which is characterized by comprising an upper die, a bearing table and a lower punching die which are sequentially arranged from top to bottom, the upper die comprises a forming cylinder and a top core, a continuous channel is arranged in the forming cylinder from bottom to top and comprises a leading-in hole, a forming hole and a movable through hole, the top core comprises a top surface and a top rod, the top surface is accommodated in the forming hole, one end of the top rod is connected with the top surface, and the other end of the top rod movably penetrates through the movable through hole; the bearing table is used for placing a soft package battery to be subjected to edge folding; during edge folding operation, the lower punching die is used for pressing the soft package battery to be subjected to edge folding into the forming hole along the guide-in hole to complete edge folding operation, the ejector core is used for ejecting the soft package battery out of the forming hole after edge folding operation, and the device can improve the height consistency and edge sealing uniformity of the soft package battery after edge folding.

Description

Technical Field

[0001] The utility model relates to the technical field of soft-pack battery preparation, in particular to a soft-pack battery folding device. Background Art

[0002] In the manufacturing process of soft-pack batteries, the folding step after sealing is a crucial process node. Its core goal is to accurately shape the battery's external dimensions to ensure the airtightness of the battery package and the safety and reliability of the battery cell operation. The traditional folding process of soft-pack batteries is mainly carried out using a stamping die. Generally, a cavity matching the battery sealing contour is designed in the lower die. During the operation, the packaged soft-pack battery is first placed on the cavity, and then pressure is applied through the upper die to press the battery edge into the cavity to achieve folding.

[0003] However, it is found in actual production that after folding the edges using traditional stamping dies, the consistency of the overall height of the battery is difficult to effectively guarantee, and the height of batteries in different batches or within the same batch may fluctuate greatly, which poses a challenge to the modular combination of batteries or the integration of terminal products; secondly, the traditional mold folding process often leads to uneven and symmetrical edge sealing structure, that is, the edge sealing of the battery side wall may be uneven and not tightly fitted, which not only affects the appearance quality of the battery, but more seriously reduces the sealing efficiency of the battery and increases the risk of electrolyte leakage and invasion of foreign substances, which directly affects the service life and safety of the battery.

[0004] Therefore, it is necessary to develop a new technology or equipment that can improve the height consistency and edge sealing structure quality of soft-pack batteries after folding. Utility Model Content

[0005] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a soft-pack battery folding device.

[0006] The purpose of this utility model is achieved through the following technical solutions:

[0007] A soft-pack battery folding device comprises: an upper die, a bearing platform and a lower punch die arranged in sequence from top to bottom;

[0008] The upper mold includes a forming cylinder and a top core, wherein a continuous channel from bottom to top is provided in the forming cylinder, including an introduction hole, a forming hole and a movable through hole, and the top core includes a top surface and a top rod, wherein the top surface is accommodated in the forming hole, one end of the top rod is connected to the top surface, and the other end of the top rod can movably pass through the movable through hole;

[0009] The supporting platform is used to place the soft-pack batteries to be folded;

[0010] During the folding operation, the lower punch is used to press the soft-pack battery to be folded into the forming hole along the introduction hole to complete the folding operation. After the folding operation, the top core is used to eject the soft-pack battery from the forming hole.

[0011] In one embodiment, the upper mold further includes an elastic connecting member, and the top core is elastically connected to the forming cylinder via the elastic connecting member.

[0012] In one embodiment, the elastic connecting member includes a spring, a limit block and a locking screw. The spring is sleeved on the push rod. The end of the push rod away from the top surface is connected to the limit block through the locking screw. The two ends of the spring are respectively connected to the limit block and the forming cylinder.

[0013] In one embodiment, the introduction hole is in a bell-mouth shape.

[0014] In one embodiment, the edge of the opening end of the introduction hole is provided with a rounded chamfer.

[0015] In one embodiment, the diameter of the top surface is 0.1 mm to 0.5 mm smaller than that of the forming hole.

[0016] In one embodiment, a slot structure is provided on the outer side wall of the forming cylinder.

[0017] In one embodiment, a limiting through hole is provided on the supporting platform, the body of the soft-pack battery to be folded is accommodated in the limiting through hole, and the sealed edge of the soft-pack battery to be folded is abutted against the open end of the limiting through hole.

[0018] In one embodiment, the soft-pack battery folding device also includes a rotating feeding mechanism, which includes a first rotating driving member, a turntable and a plurality of the supporting platforms, wherein the plurality of the supporting platforms are evenly distributed on the turntable, and the first rotating driving member drives the turntable to rotate in a horizontal direction so that the plurality of the supporting platforms sequentially drive the soft-pack batteries to be folded to move to the working area of ​​the upper die and the lower punch for folding operations.

[0019] In one embodiment, the soft-pack battery folding device also includes a rotating material picking mechanism, which includes a second rotating drive member, a material picking arm and a material picking box. The material picking box is arranged on the material picking arm. The second rotating drive member drives the material picking arm to rotate in a horizontal direction so that the material picking box can collect the soft-pack battery ejected from the upper mold after the folding operation.

[0020] Compared with the prior art, the utility model has at least the following advantages:

[0021] The utility model provides a soft-pack battery folding device. By arranging an upper die, a bearing platform and a lower punch die, during the folding operation, the design of the introduction hole ensures that the battery can smoothly enter the forming hole, and the forming hole is responsible for completing the folding operation of the battery. The top surface plays a limiting role in the height direction of the soft-pack battery. The movable top core enables the battery to be easily and non-destructively ejected from the forming hole after the folding operation. Through the soft-pack battery folding device, the height consistency and folding uniformity of the soft-pack battery after folding can be improved, thereby improving the battery quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 This is a schematic structural diagram of a soft-pack battery folding device according to one embodiment of the utility model;

[0024] Figure 2 This is a schematic diagram of the upper mold structure of a soft-pack battery folding device according to one embodiment of the utility model;

[0025] Figure 3 It is a schematic structural diagram of a soft-pack battery folding device according to one embodiment of the utility model.

[0026] The numbers in the figure are: 10, soft-pack battery folding device; 100, upper mold; 110, forming cylinder; 111, introduction hole; 1111, circular chamfer; 112, forming hole; 113, movable through hole; 114, slot structure; 120, top core; 121, top surface; 122, ejector; 130, elastic connector; 131, spring; 132, limit block; 133, locking screw; 200, bearing platform; 210, limit through hole; 300, lower punch; 400, folding drive device; 500, rotary feeding mechanism; 510, first rotary driving member; 520, turntable; 600, rotary material picking mechanism; 610, second rotary driving member; 620, material picking arm; 630, material picking box; 20, soft-pack battery; 700, battery body; 800, edge sealing. DETAILED DESCRIPTION

[0027] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively with reference to the relevant drawings. The drawings provide preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly and comprehensively understood.

[0028] See also Figure 1 A soft-pack battery folding device (10) comprises: an upper die (100), a supporting platform (200) and a lower punch (300) arranged in sequence from top to bottom; the upper die (100) comprises a forming cylinder (110) and a top core (120); a continuous channel from bottom to top is arranged in the forming cylinder (110), comprising an introduction hole (111), a forming hole (112) and a movable through hole (113); the top core (120) comprises a top surface (121) and a top rod (122); the top surface (121) is accommodated in the forming hole In (112), one end of the push rod (122) is connected to the top surface (121), and the other end of the push rod (122) can be movably passed through the movable through hole (113); the supporting platform (200) is used to place the soft-pack battery (20) to be folded; during the folding operation, the lower punch (300) is used to press the soft-pack battery (20) to be folded along the introduction hole (111) into the forming hole (112) to complete the folding operation; after the folding operation, the top core (120) is used to eject the soft-pack battery (20) from the forming hole (112).

[0029] It should be noted that the soft-pack battery folding device also includes a folding drive device (400), which is used to drive the upper die (100) and the lower punch die (300) to move up and down. During the operation of the soft-pack battery folding device (10), the various components work together to complete the folding of the battery. The following is a description of the specific actions of the device in the folding operation:

[0030] Step 1: A soft-pack battery (20) to be folded is placed on the carrier (200), and the upper die (100), the carrier (200) and the lower punch (300) are aligned and arranged in sequence from top to bottom under the drive of an external driving device;

[0031] Step 2: The folding drive device (400) is started, and the upper mold (100) moves downward until it is aligned with the carrier platform (200), and then the folding drive device (400) drives the lower punch (300) to start rising, so that the lower punch (300) gradually approaches the soft-pack battery (20) on the carrier platform (200). During this process, the lower punch (300) is aligned with the end surface of the battery body (700) and is ready to be pushed into the forming cylinder (110) of the upper mold (100);

[0032] Step 3: The battery is pushed by the lower punch (300) and smoothly enters the forming hole (112) along the introduction hole (111) until the end surface of the battery body (700) abuts against the top surface (121) of the top core (120). During the pushing process, the battery sealing edge (800) is folded under the shape and pressure of the forming hole. The shape and size of the forming hole (112) are precisely designed to ensure that the battery sealing edge (800) can be evenly and tightly attached to the side wall of the battery body (700);

[0033] Step 4: After the folding operation is completed, the top core (120) starts to move. The top rod (122) pushes the top surface (121) under the action of the driving device to push the formed soft-pack battery (20) out of the forming hole (112), so that the soft-pack battery (20) falls into the receiving device.

[0034] In the whole process, the precise matching of the upper die (100), the carrier (200) and the lower punch (300) is the key to ensure the quality and efficiency of the folding. The top surface (121), as a part of the top core (120), is closely matched with the forming hole (112) during the folding operation. When the soft-pack battery (20) is pressed into the forming hole (112) for folding, the top surface (121) and the end surface of the battery body (700) abut against each other to play a limiting role, preventing the soft-pack battery (20) from being over-pressed, thereby ensuring that the depth of each folding operation is consistent. By accurately controlling the distance from the top surface (121) to the opening end of the forming hole (112), it can be ensured that each soft-pack battery (20) has the same height after folding, thereby improving the height consistency of the soft-pack battery (20) after the folding operation. At the same time, the design of the introduction hole (111) ensures uniform introduction of the battery before entering the forming hole (112), which helps the soft-pack battery (20) maintain a stable posture during the folding process and reduces the position deviation of the battery when entering the forming hole (112), thereby making the edge sealing more uniform, which not only improves the appearance quality of the soft-pack battery (20), but also helps to improve the sealing and performance of the soft-pack battery (20).

[0035] See also Figure 1 and Figure 2 Furthermore, the upper mold (100) further includes an elastic connecting member (130), and the top core (120) is elastically connected to the forming cylinder (110) via the elastic connecting member (130).

[0036] It should be noted that, after the top core (120) pushes the battery out of the forming hole (112), due to the elastic effect of the elastic connector (130), it will exert a reverse force on the top core (120) to return it to its initial position. This design not only improves production efficiency, because no manual or additional mechanical device is required to reset the top core (120), but also increases the reliability and durability of the equipment. In addition, the elastic connector (130) can also play a buffering role, reducing the impact of the top core (120) on the forming cylinder (110) during the resetting process, thereby extending the service life of the equipment.

[0037] See also Figure 1 Furthermore, the elastic connecting member (130) includes a spring (131), a limit block (132) and a locking screw (133). The spring (131) is sleeved on the top rod (122). One end of the top rod (122) away from the top surface (121) is connected to the limit block (132) through the locking screw (133). The two ends of the spring (131) are respectively connected to the limit block (132) and the forming cylinder (110).

[0038] It should be noted that the two ends of the spring (131) are respectively connected to the limit block (132) and the forming cylinder (110), forming a complete elastic system. When the push rod (122) pushes the battery out of the forming hole (112), the spring (131) will be compressed; and when the push rod (122) is reset, the spring (131) will reset and help the push rod (122) accurately return to the initial position. Through the coordinated action of the spring (131), the limit block (132) and the locking screw (133), the automatic reset and precise control of the push rod (122) are achieved.

[0039] See also Figure 1 Furthermore, the introduction hole (111) is in a bell-mouth shape.

[0040] It should be noted that the introduction hole (111) of the trumpet-shaped shape is characterized by being larger at one end and then gradually narrowing to a size that matches the formed hole (112). The trumpet-shaped shape can more effectively guide the battery into the formed hole (112) because it provides a gradually shrinking path, which helps to align and position the battery with the formed hole (112). At the same time, due to the larger opening of the trumpet-shaped shape, even if the position of the soft-pack battery (20) is slightly deviated during insertion, it can be gradually corrected through the guidance of the trumpet-shaped shape and successfully enter the formed hole (112). Therefore, the trumpet-shaped shape can achieve a more uniform distribution of sealing pressure, avoid sudden pressure changes, and thus ensure the uniformity of the folding edge.

[0041] See also Figure 2 Furthermore, a circular chamfer (1111) is provided at the edge of the opening end of the introduction hole (111).

[0042] It should be noted that the rounded chamfer (1111) can significantly reduce the stress concentration phenomenon at the edge of the introduction hole (111). During the battery packaging process, the sharp part of the edge is often a high-incidence area of ​​stress concentration, which may cause tearing or damage to the edge sealing material. By providing a rounded chamfer (1111), these stresses can be effectively dispersed, improving the uniformity and reliability of the edge sealing.

[0043] Furthermore, the diameter of the top surface (121) is 0.1 mm to 0.5 mm smaller than that of the forming hole (112).

[0044] It should be noted that the diameter of the top surface (121) needs to be slightly smaller than the diameter of the forming hole (112) so that the top core (120) can move up and down smoothly in the forming hole (112) to reduce friction and wear between each other. While reducing friction, the diameter of the top surface (121) must be as large as possible. Increasing the area of ​​the top surface (121) can increase the contact surface between the top core (120) and the battery, making the packaging pressure more evenly distributed on the battery surface, helping to reduce stress concentration and avoid excessive or excessive local pressure during folding and ejection operations, thereby improving the stability and durability of the battery packaging quality and improving production efficiency.

[0045] See also Figure 1 and Figure 2 Furthermore, a slot structure (114) is provided on the outer side wall of the forming cylinder (110).

[0046] It should be noted that the main function of the slot structure (114) is to fix the forming cylinder (110) to ensure its stability and accuracy during operation. This slot design can be matched with an external fixing device (for example, the upper mold (100) needs to be installed on an external driving device) so that the forming cylinder (110) can be firmly maintained in the desired position after installation and will not move or misalign due to vibration or force during operation.

[0047] See also Figure 1 and Figure 3 Furthermore, a limiting through hole (210) is provided on the supporting platform (200), the body of the soft-pack battery (20) to be folded is accommodated in the limiting through hole (210), and the sealed edge of the soft-pack battery (20) to be folded is abutted against the open end of the limiting through hole (210).

[0048] It should be noted that the diameter of the limiting through hole (210) is slightly larger than the diameter of the body of the soft-pack battery (20). When the soft-pack battery (20) to be folded is placed on the supporting platform (200), its body can be just accommodated in the limiting through hole (210), and the sealing edge (800) of the soft-pack battery (20) to be folded will be against the open end of the limiting through hole (210). The design of the limiting through hole (210) provides a stable support and positioning for the battery, and can ensure the movement stability of the soft-pack battery (20) when the supporting platform (200) and the upper mold (100) and the lower punch (300) are aligned, thereby improving the position accuracy of the soft-pack battery (20) during the folding operation.

[0049] See also Figure 3 Furthermore, the soft-pack battery folding device (10) also includes a rotating feeding mechanism (500), the rotating feeding mechanism (500) includes a first rotating driving member (510), a turntable (520) and a plurality of supporting platforms (200), the plurality of supporting platforms (200) are evenly distributed on the turntable (520), and the first rotating driving member (510) drives the turntable (520) to rotate in a horizontal direction, so that the plurality of supporting platforms (200) sequentially drive the soft-pack batteries (20) to be folded to move to the working area of ​​the upper die (100) and the lower punch die (300) for folding operations.

[0050] It should be noted that the soft-pack battery folding device (10) realizes an automated and efficient battery feeding process by introducing a rotating feeding mechanism (500), which significantly improves production efficiency because it allows continuous and automated battery feeding and reduces the need for manual intervention.

[0051] See also Figure 3 Furthermore, the soft-pack battery folding device (10) also includes a rotating material picking mechanism (600), the rotating material picking mechanism (600) includes a second rotating driving member (610), a material picking arm (620) and a material picking box (630), the material picking box (630) is arranged on the material picking arm (620), and the second rotating driving member (610) drives the material picking arm (620) to rotate in a horizontal direction, so that after the folding operation, the material picking box (630) can collect the soft-pack batteries (20) ejected from the upper mold (100).

[0052] It should be noted that, through precise rotation control and positioning, the rotary material taking mechanism (600) can collect finished batteries in time after each folding operation cycle, which provides convenience for the next round of folding operation and reduces the risk of battery damage or confusion caused by human operation errors. The rotary material taking mechanism (600) not only improves the automation level of the production line and reduces manual intervention through automation and precise control, but also ensures the efficiency and accuracy of battery collection.

[0053] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A soft pack battery folding device, characterized in that: include: An upper die, a bearing platform and a lower punch die are arranged in sequence from top to bottom; The upper mold includes a forming cylinder and a top core, wherein a continuous channel from bottom to top is provided in the forming cylinder, including an introduction hole, a forming hole and a movable through hole, and the top core includes a top surface and a top rod, wherein the top surface is accommodated in the forming hole, one end of the top rod is connected to the top surface, and the other end of the top rod can movably pass through the movable through hole; The supporting platform is used to place the soft-pack batteries to be folded; During the folding operation, the lower punch is used to press the soft-pack battery to be folded into the forming hole along the introduction hole to complete the folding operation. After the folding operation, the top core is used to eject the soft-pack battery from the forming hole.

2. The soft pack battery folding device according to claim 1, characterized in that: The upper mold also includes an elastic connecting piece, and the top core is elastically connected to the forming cylinder through the elastic connecting piece.

3. The soft pack battery folding device according to claim 2, characterized in that: The elastic connecting member includes a spring, a limit block and a locking screw. The spring is sleeved on the push rod. The end of the push rod away from the top surface is connected to the limit block through the locking screw. The two ends of the spring are respectively connected to the limit block and the forming cylinder.

4. The soft pack battery folding device according to claim 1, characterized in that: The introduction hole is in a trumpet shape.

5. The soft pack battery folding device according to claim 4, characterized in that: The edge of the opening end of the introduction hole is provided with a circular chamfer.

6. The soft pack battery folding device according to claim 1, characterized in that: The diameter of the top surface is 0.1 mm to 0.5 mm smaller than that of the forming hole.

7. The soft pack battery folding device according to claim 1, characterized in that: The outer side wall of the forming cylinder is provided with a slot structure.

8. The soft pack battery folding device according to claim 1, characterized in that: The supporting platform is provided with a limiting through hole, the body of the soft-pack battery to be folded is accommodated in the limiting through hole, and the sealed edge of the soft-pack battery to be folded is abutted against the open end of the limiting through hole.

9. The soft pack battery folding device according to claim 8, characterized in that: The soft-pack battery folding device also includes a rotating feeding mechanism, which includes a first rotating driving member, a turntable and a plurality of the supporting platforms, wherein the plurality of the supporting platforms are evenly distributed on the turntable, and the first rotating driving member drives the turntable to rotate in a horizontal direction so that the plurality of the supporting platforms sequentially drive the soft-pack batteries to be folded to move to the working area of ​​the upper die and the lower punch for folding operations.

10. The soft pack battery folding device according to claim 1, characterized in that: The soft-pack battery folding device also includes a rotating material picking mechanism, which includes a second rotating drive member, a material picking arm and a material picking box. The material picking box is arranged on the material picking arm. The second rotating drive member drives the material picking arm to rotate in a horizontal direction so that the material picking box can collect the soft-pack battery ejected from the upper mold after the folding operation.

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