Packaging machine and packaging process of flexible package lithium ion battery cell

Abstract

The invention belongs to lithium ion battery cell packaging equipment, and particularly relates to a packaging machine and a packaging process of a flexible package lithium ion battery cell. A packaging machine for flexible package lithium ion cells can directly cut off redundant packaging bags in the packaging machine and comprises a packaging machine body and a cutting mechanism, the cutting mechanism is arranged in the packaging machine body and located on the side face of a hot-pressing edge, and the cutting mechanism is arranged on the side face of the hot-pressing edge. The cutting mechanism comprises pressing rods, convex blocks, a third electric track, a cutter, a push rod and a first torsional spring, the pressing rods are rotationally connected to the lower portions of the front sides of the left wall and the right wall of the packaging machine body through shafts, the convex blocks are fixedly connected to the front ends of the shafts connected with the pressing rods, and the pressing rods and the convex blocks rotate synchronously; and a first torsional spring is arranged at the rotating joint of the pressing rod, and a third electric track is fixedly connected to the lower part of the front side of the placing plate. According to the packaging device, materials can be packaged through the containing plate and the hot press, after the materials are packaged, the materials leaking out of the containing plate are cut off through the cutter, and the working efficiency is improved.

Description

Technical Field

[0001] The present invention belongs to lithium-ion battery cell packaging equipment, and particularly relates to a packaging machine and a packaging process for soft-packaged lithium-ion battery cells. Background Art

[0002] With the increasing demand for miniaturization and portability of electronic devices, soft-packaged lithium-ion battery cells have been widely used due to their light weight, high energy density, and good safety. However, in the production process of soft-packaged lithium-ion battery cells, the packaging step is one of the key links to ensure the performance and safety of the battery cells. Traditional packaging processes usually include loading the battery cell components into an aluminum-plastic film and completing the packaging process through steps such as thermoforming, liquid injection, and sealing.

[0003] In the prior art, a common problem is that after the battery cell packaging is completed, it is often necessary to manually or semi-automatically cut off the excess packaging material (i.e., the excess packaging bag) to meet the size requirements and aesthetic standards of the final product. This operation method has the following disadvantages: Low efficiency: After the packaging of the battery cells is completed, the battery cells need to be taken out first and then the cutting operation is carried out, which not only increases additional operation steps but also reduces the operating efficiency of the overall production line.

[0004] Unstable quality: Since the cutting process is separated from the packaging process, it may lead to inaccurate cutting positions, affecting the consistency and appearance quality of the product.

[0005] Safety hazards: There may be a risk of misoperation during the manual cutting process. For example, the cutting tool may damage the battery cell structure or cause injury to personnel.

[0006] Increased cost: In order to ensure the cutting quality, enterprises often need to invest more human resources for monitoring and management, increasing the production cost.

[0007] Therefore, there is an urgent need to develop a packaging machine and a packaging process for soft-packaged lithium-ion battery cells that can directly cut off the excess packaging bag inside the packaging machine. Summary of the Invention

[0008] In order to overcome the above-mentioned disadvantages of the prior art, the present invention provides a packaging machine and a packaging process for soft-packaged lithium-ion battery cells that can directly cut off the excess packaging bag inside the packaging machine.

[0009] The technical implementation solution of the present invention is as follows: A packaging machine for soft-packaged lithium-ion battery cells includes a packaging machine body and a cutting mechanism. The cutting mechanism is arranged inside the packaging machine body, on the side of the hot pressing edge. The cutting mechanism includes a pressing rod, a convex block, a third electric track, a cutter, a push rod, and a first torsion spring. The lower front sides of the left and right walls of the packaging machine body are rotatably connected by shafts to the pressing rods. The front ends of the shafts connecting the pressing rods are fixedly connected to the convex blocks. The pressing rods and the convex blocks rotate synchronously. A first torsion spring is arranged at the rotation connection of the pressing rod. The lower front side of the first torsion spring placement plate is fixedly connected to the third electric track. A cutter is fixedly connected between the sliders of the third electric track. Push rods extending upward are connected to both the left and right sides of the cutter.

[0010] Optionally, the packaging machine body includes a cabinet, a first electric track, a placement plate, a second electric track, a hot press, and a limiting plate. The first electric tracks are symmetrically and fixedly connected to the bottom of the cabinet on the left and right. A placement plate is fixedly connected between the sliders at the top of the first electric tracks. The second electric tracks are vertically and fixedly connected to the upper parts of the left and right walls inside the cabinet. A hot press is fixedly connected between the sliders of the second electric tracks. The limiting plates are symmetrically and fixedly connected to the rear side of the top of the placement plate.

[0011] Optionally, it further includes a rack plate. Rack plates that engage with each other are arranged at the bottom edge of the hot press and the top edge of the placement plate.

[0012] Optionally, it further includes a blower. The blower is fixedly connected to the lower part of the rear wall of the cabinet.

[0013] Optionally, it further includes a side positioning mechanism. The side positioning mechanism is arranged on the placement plate and includes a motor, a lead screw, a moving plate, an arc-shaped pressing plate, and a second torsion spring. The motor is fixedly connected to the middle of the right side of the placement plate. The output shaft on the left side of the motor is connected to the lead screw. The left end of the lead screw is rotatably connected to the left part of the placement plate through a bearing seat. The left and right parts of the lead screw are threadedly connected to the moving plates. The moving plates are slidably connected to the placement plate. The arc-shaped pressing plate is rotatably connected to the top of the moving plate. A second torsion spring is arranged at the rotation connection of the arc-shaped pressing plate. The arc-shaped pressing plate inclines downward and inward, and the bottom of the arc-shaped pressing plate is an obtuse arc that bends upward.

[0014] Optionally, it further includes a collection mechanism. The collection mechanism is rotatably connected to the lower left corner of the front side of the cabinet and includes a collection frame and a third torsion spring. The collection frame is rotatably connected to the lower left corner of the front side of the cabinet. The collection frame is in front of the cutter, and a third torsion spring is arranged at the rotation connection of the collection frame.

[0015] Optionally, it further includes a rear positioning mechanism. The rear positioning mechanism is installed on the hot press and includes an electric wheel. An installation opening is provided in the front part of the hot press, and the electric wheel is installed in the installation opening. A rubber sleeve is sleeved on the outer surface of the electric wheel.

[0016] Optionally, it further includes a cleaning mechanism. The cleaning mechanism is provided on both the left and right walls inside the cabinet. The cleaning mechanism includes a vacuum cleaner. The vacuum cleaner is installed below both the left and right walls inside the cabinet, and the discharge port of the vacuum cleaner is above the collection box.

[0017] A packaging process for a soft-packaged lithium-ion battery cell includes the following steps: Step 1: Send out the placement plate through the first electric track for feeding. After feeding is completed, move the placement plate and the materials thereon to the packaging station through the first electric track. Step 2: Drive the hot press through the second electric track to package the materials. Step 3: Drive the cutting knife to move upward through the third electric track to cut off the waste materials. Step 4: Send out the materials packaged on the placement plate through the first electric track and perform material taking.

[0018] The present invention has the following advantages: Through the placement plate and the hot press, the present invention can perform packaging operations on the materials. After the materials are packaged, the materials leaking outside the placement plate are cut off by the cutting knife, improving work efficiency and maintaining product consistency at the same time; by the pressure rod, it can be pressed on both sides of the cutting trace, which can facilitate the cutting knife to cut the waste materials and improve the cutting accuracy, ensuring the beautiful appearance of the product. Description of the Drawings

[0019] Figure 1 It is a three-dimensional structure diagram of the present invention.

[0020] Figure 2 It is a three-dimensional structure diagram of the packaging machine body of the present invention.

[0021] Figure 3 It is a three-dimensional structure diagram of the cutting mechanism of the present invention.

[0022] Figure 4 It is a position diagram of the side positioning mechanism of the present invention.

[0023] Figure 5 It is a three-dimensional structure diagram of the side positioning mechanism of the present invention.

[0024] Figure 6 It is a three-dimensional structure diagram of the moving plate, the arc-shaped pressing plate and the second torsion spring of the present invention.

[0025] Figure 7 It is a three-dimensional structure diagram of the rear positioning mechanism of the present invention.

[0026] Figure 8 It is a three-dimensional structure diagram of the collection mechanism and the cleaning mechanism of the present invention.

[0027] The markings of each component in the attached drawings are as follows: 1: encapsulation machine body, 101: cabinet, 102: first electric track, 103: placement board, 104: second electric track, 105: hot press, 106: rack board, 107: limiting board, 108: fan, 2: cutting mechanism, 201: pressing rod, 202: bump, 203: third electric track, 204: cutter, 205: push rod, 206: first torsion spring, 3: side positioning mechanism, 301: motor, 302: lead screw, 303: moving board, 304: arc-shaped pressing plate, 305: second torsion spring, 4: collection mechanism, 401: collection box, 402: third torsion spring, 5: rear positioning mechanism, 501: installation port, 502: electric wheel, 6: cleaning mechanism, 601: vacuum cleaner, 602: discharge port. Detailed implementation manners

[0028] To make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the attached drawings. It is hereby declared that the orientation terms such as up, down, left, right, front, rear, inner, and outer that appear or will appear in the text of the present invention are only based on the attached drawings of the present invention, and they do not specifically limit the present invention.

[0029] Embodiment: An encapsulation machine for soft-packaged lithium-ion battery cells, as Figures 1 - 3 shown, includes an encapsulation machine body 1 and a cutting mechanism 2. The cutting mechanism 2 is arranged inside the encapsulation machine body 1 and is on the side at the edge of hot pressing.

[0030] As Figure 1 and 2As shown in the figure, the encapsulation machine body 1 includes a cabinet 101, a first electric track 102, a placement plate 103, a second electric track 104, a hot press 105, a rack plate 106, a limit plate 107 and a blower 108. The bottom inside the cabinet 101 is symmetrically and fixedly connected to the first electric track 102 by bolts on the left and right. A placement plate 103 is fixedly connected between the sliders at the top of the first electric track 102 by bolts. After the battery cell assembly is loaded into the aluminum-plastic film, it is placed on the placement plate 103. The first electric track 102 can drive the objects on the placement plate 103 for feeding and discharging. The upper parts of the left and right walls inside the cabinet 101 are vertically and fixedly connected to the second electric track 104 by bolts. A hot press 105 is fixedly connected between the sliders of the second electric track 104 by bolts. The second electric track 104 can drive the hot press 105 to move vertically for hot pressing. A rack plate 106 that engages with each other is provided between the bottom edge of the hot press 105 and the top edge of the placement plate 103. During the hot pressing process, due to the special structure of the rack plate 106, wrinkles can be formed at the edge of the hot pressing, so that the edge of the heat seal can be better sealed. Limit plates 107 are symmetrically and fixedly connected to the rear side of the top of the placement plate 103 on the left and right. After the material is placed, the edge of the material contacts the limit plate 107, and at this time the material placement is completed. The blower 108 is fixedly connected to the lower part of the rear wall of the cabinet 101 by bolts. After the material is hot pressed, the blower 108 can quickly cool the hot pressed part of the material when it works.

[0031] As Figure 3 shown, the cutting mechanism 2 includes a pressure rod 201, a convex block 202, a third electric track 203, a cutter 204, a push rod 205 and a first torsion spring 206. The lower parts of the front sides of the left and right walls of the cabinet 101 are rotatably connected to the pressure rod 201 by shafts. Fixed rods are connected to the front ends of the shafts connecting the pressure rod 201 with convex blocks 202. The pressure rod 201 and the convex block 202 rotate synchronously. A first torsion spring 206 is provided at the rotation connection of the pressure rod 201. The lower part of the front side of the placement plate 103 is fixedly connected to the third electric track 203 by bolts. A cutter 204 is fixedly connected between the sliders of the third electric track 203. Push rods 205 extending upward are connected to both the left and right sides of the cutter 204. When the placement plate 103 is inside the cabinet 101 for encapsulation work, the push rod 205 is below the convex block 202, and the third electric track 203 can drive the cutter 204 to move vertically for cutting.

[0032] As Figures 4 - 6As shown in the figure, it further includes a side positioning mechanism 3. The side positioning mechanism 3 is arranged on the placing plate 103. The side positioning mechanism 3 includes a motor 301, a lead screw 302, a moving plate 303, an arc-shaped pressing plate 304 and a second torsion spring 305. The middle part on the right side of the placing plate 103 is fixedly connected with the motor 301 by bolts. The output shaft on the left side of the motor 301 is connected with the lead screw 302 through a coupling. The left end of the lead screw 302 is rotationally connected with the left part of the placing plate 103 through a bearing seat. Both the left part and the right part of the lead screw 302 are threadedly connected with a moving plate 303. The moving plate 303 is slidably connected with the placing plate 103. The top of the moving plate 303 is rotationally connected with an arc-shaped pressing plate 304. A second torsion spring 305 is arranged at the rotational connection of the arc-shaped pressing plate 304. The arc-shaped pressing plate 304 inclines downward to the inside. The bottom of the arc-shaped pressing plate 304 is an obtuse arc that bends upward. After the material enters the cabinet 101, controlling the motor 301 to rotate can drive the moving plate 303 and the devices thereon to close inward or separate outward. By the moving plate 303 closing inward, the materials placed on the top of the placing plate 103 are moved closer to the middle for positioning. At the same time, because the bottom of the arc-shaped pressing plate 304 is an obtuse arc that bends upward, when the placing plate 103 moves inward and is blocked by a hard limit, the arc-shaped pressing plate 304 will directly cross the edge of the material and press on the top of the material, so that the material will not be damaged. After the material is heat-sealed, under the action of the motor 301, the moving plate 303 moves outward to reset.

[0033] As Figure 8 shown in the figure, it further includes a collection mechanism 4. The collection mechanism 4 is rotationally connected to the lower left corner of the front side of the cabinet 101. The collection mechanism 4 includes a collection frame 401 and a third torsion spring 402. The collection frame 401 is rotationally connected to the lower left corner of the front side of the cabinet 101. The collection frame 401 is in front of the cutting knife 204. A third torsion spring 402 is arranged at the rotational connection of the collection frame 401. After the cutting knife 204 cuts off the excess waste material, the waste material falls into the collection frame 401.

[0034] As Figure 7 shown in the figure, it further includes a rear positioning mechanism 5. The rear positioning mechanism 5 is installed on the hot press 105. The rear positioning mechanism 5 includes an electric wheel 502. An installation opening 501 is formed in the front part of the hot press 105. The electric wheel 502 is installed in the installation opening 501. A rubber sleeve is sleeved on the outer surface of the electric wheel 502. By rotating the electric wheel 502, the material on the placing plate 103 can be pushed backward.

[0035] As Figure 8As shown in the figure, it further includes a cleaning mechanism 6. The cleaning mechanism 6 is provided on both the left and right walls inside the cabinet 101. The cleaning mechanism 6 includes a vacuum cleaner 601. The vacuum cleaner 601 is installed below both the left and right walls inside the cabinet 101. The discharge port 602 of the vacuum cleaner 601 is above the collection box 401. Before the encapsulation operation, the vacuum cleaner 601 is controlled to start working, which can absorb the impurities on the surface of the material, facilitating the subsequent encapsulation operation.

[0036] When the device needs to be used, first, the first electric track 102 drives the placement plate 103 to move forward and send out. The placement plate 103 pushes the collection box 401 to rotate outward, and the third torsion spring 402 deforms. Then, the material is placed on the placement plate 103. Subsequently, the first electric track 102 drives the placement plate 103 and the material thereon to move inward to the encapsulation station. At this time, the third torsion spring 402 resets, driving the collection box 401 to rotate inward and reset. At this time, the second electric track 104 is controlled to drive the hot press 105 to move downward for the encapsulation operation of the material. At the same time, the electric wheel 502 is also controlled to rotate. When the electric wheel 502 contacts the material, it pushes the material to move backward. After the rear side of the material fits against the limit plate 107, the material stops moving. Subsequently, the hot press 105 performs the encapsulation operation. After the material is encapsulated, the second electric track 104 is controlled to drive the hot press 105 to move upward and reset. At this time, the third electric track 203 is controlled to drive the cutting knife 204 to move upward to cut off the material leaking outside the placement plate 103. And when the cutting knife 204 moves upward, it drives the push rod 205 to move upward. When the push rod 205 moves upward and contacts the convex block 202, it pushes the convex block 202 to rotate upward, causing the pressing rod 201 to move downward and press on both sides of the cutting mark. The first torsion spring 206 deforms. The pressing rod 201 presses on both sides of the cutting mark, which can facilitate the cutting knife 204 to cut the waste material. The cut material falls into the collection box 401. Subsequently, the third electric track 203 drives the cutting knife 204 to move downward and reset, and the first torsion spring 206 resets, driving the convex block 202 and the pressing rod 201 to reset and no longer press the material. Then, the first electric track 102 is controlled again to push out the encapsulated material and perform the picking operation. Subsequently, the above operations are repeated to encapsulate the remaining materials. After the encapsulation work is completed, the device is controlled to stop working.

[0037] An encapsulation process for soft-packaged lithium-ion battery cells includes the following steps: Step 1: The placement plate 103 is sent out through the first electric track 102 for feeding. After feeding, the placement plate 103 and the material thereon are moved to the encapsulation station through the first electric track 102. Step 2: The second electric track 104 drives the hot press 105 to encapsulate the material. Step 3: The third electric track 203 drives the cutting knife 204 to move upward to cut off the waste material. Step 4: Send out the materials encapsulated on the placement plate 103 through the first electric track 102 and pick up the materials.

[0038] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes may be made therein without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An encapsulation machine for a soft-packaged lithium-ion battery cell, comprising an encapsulation machine body (1) and a cutting mechanism (2). The cutting mechanism (2) is arranged inside the encapsulation machine body (1), and the cutting mechanism (2) is located on the side of the hot pressing edge. It is characterized in that: The cutting mechanism (2) includes a pressure rod (201), a convex block (202), a third electric rail (203), a cutter (204), a push rod (205) and a first torsion spring (206). The lower parts of the front sides of the left and right walls of the encapsulation machine body (1) are rotatably connected by shafts to the pressure rods (201). The front ends of the shafts connecting the pressure rods (201) are fixedly connected to the convex blocks (202) by rods. The pressure rods (201) and the convex blocks (202) rotate synchronously. A first torsion spring (206) is arranged at the rotation connection of the pressure rod (201). The lower part of the front side of the placement plate (103) is fixedly connected to a third electric rail (203). A cutter (204) is fixedly connected between the sliders of the third electric rail (203). Push rods (205) extending upward are connected to both the left and right sides of the cutter (204).

2. The encapsulation machine for a soft-packaged lithium-ion battery cell according to claim 1, wherein: The encapsulation machine body (1) includes a cabinet (101), a first electric rail (102), a placement plate (103), a second electric rail (104), a hot press (105) and a limiting plate (107). The first electric rails (102) are symmetrically and fixedly connected to the left and right of the inner bottom of the cabinet (101). A placement plate (103) is fixedly connected between the sliders at the top of the first electric rails (102). The second electric rails (104) are vertically and fixedly connected to the upper parts of the left and right walls inside the cabinet (101). A hot press (105) is fixedly connected between the sliders of the second electric rails (104). Limiting plates (107) are symmetrically and fixedly connected to the rear side of the top of the placement plate (103).

3. The encapsulation machine for a soft-packaged lithium-ion battery cell according to claim 2, characterized in that: It further includes a rack plate (106). Rack plates (106) which engage with each other are arranged between the bottom edge of the hot press (105) and the top edge of the placement plate (103).

4. A packaging machine for a soft-packaged lithium-ion battery cell according to claim 2, characterized in that: It further includes a blower (108). The blower (108) is fixedly connected to the lower part of the rear wall of the cabinet (101).

5. The encapsulation machine for a soft-packaged lithium-ion battery cell according to claim 2, wherein: It further includes a side positioning mechanism (3). A side positioning mechanism (3) is arranged on the placement plate (103). The side positioning mechanism (3) includes a motor (301), a lead screw (302), a moving plate (303), an arc-shaped pressing plate (304) and a second torsion spring (305). The motor (301) is fixedly connected to the middle part of the right side of the placement plate (103). The output shaft on the left side of the motor (301) is connected to the lead screw (302). The left end of the lead screw (302) is rotatably connected to the left part of the placement plate (103) through a bearing block. Moving plates (303) are threadedly connected to both the left and right parts of the lead screw (302). The moving plates (303) are slidably connected to the placement plate (103). The arc-shaped pressing plate (304) is rotatably connected to the top of the moving plate (303). A second torsion spring (305) is arranged at the rotation connection of the arc-shaped pressing plate (304). The arc-shaped pressing plate (304) inclines downward to the inside, and the bottom of the arc-shaped pressing plate (304) is an obtuse arc that bends upward.

6. The encapsulation machine for a soft-packaged lithium-ion battery cell according to claim 5, characterized in that: It further includes a collection mechanism (4). The lower left corner of the front side of the cabinet (101) is rotatably connected to the collection mechanism (4). The collection mechanism (4) includes a collection frame (401) and a third torsion spring (402). The lower left corner of the front side of the cabinet (101) is rotatably connected to the collection frame (401). The collection frame (401) is located in front of the cutting knife (204). A third torsion spring (402) is arranged at the rotation connection of the collection frame (401).

7. The encapsulation machine for a soft-packaged lithium-ion battery cell according to claim 6, characterized in that: It further includes a rear positioning mechanism (5). The rear positioning mechanism (5) is installed on the hot press (105). The rear positioning mechanism (5) includes an electric wheel (502). An installation opening (501) is formed in the front part of the hot press (105). The electric wheel (502) is installed in the installation opening (501). A rubber sleeve is sleeved on the outer surface of the electric wheel (502).

8. A packaging machine for soft-packaged lithium-ion battery cells according to claim 7, characterized in that: It further includes a cleaning mechanism (6). The cleaning mechanism (6) is arranged on both the left and right walls inside the cabinet (101). The cleaning mechanism (6) includes a vacuum cleaner (601). The vacuum cleaner (601) is installed below both the left and right walls inside the cabinet (101). The discharge port (602) of the vacuum cleaner (601) is above the collection frame (401).

9. A packaging process for soft-packaged lithium-ion battery cells, comprising the following steps: Step 1: Send out the placement plate (103) through the first electric track (102) for feeding. After the feeding is completed, move the placement plate (103) and the materials thereon to the packaging station through the first electric track (102). Step 2: Drive the hot press (105) to package the materials through the second electric track (104). Step 3: Drive the cutting knife (204) to move upward through the third electric track (203) to cut off the waste materials. Step 4: Send out the materials packaged on the placement plate (103) through the first electric track (102) and take the materials.

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