Soft package lithium battery heat sealing mechanism

Abstract

The utility model discloses a heat sealing mechanism for a soft package lithium battery, which belongs to the technical field of soft package lithium battery processing and comprises a bottom plate, a heat sealing strip is attached and fixed on the side surface of the bottom end of a lower connecting plate, a power supply electrically connected with the heat sealing strip is fixed at the top of a movable plate, and a support frame plate b is arranged at the top end of the bottom plate. The support frame plate b is internally provided with a rolling assembly for smoothing the aluminum foil of the soft package lithium battery, and one side of the support frame plate b is provided with a moving assembly; the rolling assembly in the support frame plate b is driven by the moving assembly to reciprocate above the soft package lithium battery, the surface of the soft package lithium battery is rolled and flattened by the rolling assembly, so that the surface of the soft package lithium battery is repeatedly rolled and flattened by matching of the rolling assembly and the moving assembly, air in the soft package lithium battery is exhausted, and the surface of the soft package lithium battery is flattened. Wrinkles on the surface of the aluminum foil layer are removed, a gap between the aluminum foil layer of the lithium battery and a battery cell is eliminated, and the problem that the soft package lithium battery is swelled after heat sealing is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of soft-pack lithium battery processing, in particular to a soft-pack lithium battery heat sealing mechanism. Background Art

[0002] Soft-pack lithium batteries have many advantages such as good safety performance, light weight, large capacity, low internal resistance, and flexible design, so they are widely used in mobile terminals, electric vehicles, wind power generation systems, etc. Cell heat sealing is an important link in the production process of soft-pack battery cells. It is to heat-seal the upper aluminum-plastic film / bare cell's tab / lower aluminum-plastic film to form the positive and negative terminals of the battery.

[0003] In the prior art, when a soft-pack lithium battery is top-sealed, the Cpp layer is melted by heating during packaging, and pressure is applied (sealing head pressing) at the same time to bond the two layers of packaging aluminum foil together to achieve the purpose of packaging. Before the heat-sealing mechanism contacts the packaging aluminum foil, because the packaging aluminum foil is wrapped around the outside of the battery cell, the packaging aluminum foil layer itself has a certain ductility. Before the battery cell wrapped with the aluminum foil layer is placed on the bottom of the heat-sealing mechanism, it is easy to cause some wrinkles on the surface of the aluminum foil layer. When the heat-sealing mechanism completely seals the aluminum foil layer, the wrinkled layer unfolds, resulting in a gap between the aluminum foil layer and the battery cell of the lithium battery, which easily causes the soft-pack lithium battery to bulge.

[0004] Therefore, it is necessary to provide a soft-pack lithium battery heat sealing mechanism to solve the above technical problems. Utility Model Content

[0005] The utility model aims to provide a heat-sealing mechanism for a soft-pack lithium battery, so as to solve the problem that in the above-mentioned background technology, the packaging aluminum foil is wrapped around the outside of the battery cell, and the packaging aluminum foil layer itself has a certain ductility, which easily causes some wrinkles on the surface of the aluminum foil layer. When the heat-sealing mechanism completely seals the aluminum foil layer, the wrinkled layer unfolds, resulting in a gap between the aluminum foil layer and the battery cell of the lithium battery, which easily causes the soft-pack lithium battery to bulge.

[0006] To achieve the above-mentioned purpose, the utility model solves the above-mentioned technical problems as follows: a soft-pack lithium battery heat sealing mechanism, comprising a bottom plate, a bracket plate is fixed on the top side surface of the bottom plate, an electric telescopic rod is fixed at the top center position of the bracket plate, a movable plate is fixed on the output end of the electric telescopic rod, a lower connecting plate is fixed on the bottom side surface of the movable plate, a heat sealing strip is fixed on the bottom side surface of the lower connecting plate, a power supply electrically connected to the heat sealing strip is fixed on the top of the movable plate, a bracket frame plate b is arranged on the top of the bottom plate, a rolling component for smoothing the aluminum foil of the soft-pack lithium battery is arranged in the bracket frame plate b, and a movable component is arranged on one side of the bracket frame plate b.

[0007] As a further solution of the utility model, the rolling assembly includes a bracket frame plate a arranged inside the bracket frame plate b, and the two ends of the bracket frame plate a are rotatably connected with smoothing rollers, and the top center position of the bracket frame plate b is threadedly connected with a threaded rod, and the bottom end of the threaded rod is rotatably connected to the top center position of the bracket frame plate a, and two symmetrically distributed protrusions a are fixed at both ends of the bracket frame plate a, and the two ends of the bracket frame plate b are provided with sliding grooves that are slidably adapted to the protrusions a.

[0008] As a further solution of the utility model, a joint plate is fixed to the top end of the threaded rod, a protrusion b is fixed to the side of the joint plate, and a plurality of protrusions b are provided and distributed in a ring shape.

[0009] As a further solution of the present invention, the moving assembly includes two symmetrically distributed fixed plates fixed on the top side of the base plate, and the two fixed plates are connected to a screw rod for rotation together. A servo motor connected to one end of the screw rod is fixed on the top of the base plate, and a screw nut is threaded on the screw rod. A connecting rod is fixed on the outer wall of one end of the bracket frame plate b, and the end of the connecting rod away from the bracket frame plate b is fixed to the outer surface of the screw nut, a guide plate a is fixed to the bottom end of the screw nut, and a guide slide seat slidably adapted to the guide plate a is fixed on the top side of the base plate.

[0010] As a further solution of the utility model, a sliding seat is fixed on the top side surface of the base plate and is located on the side of the bracket frame plate b away from the screw nut. A guide groove is opened in the sliding seat along the length of the screw. A guide plate b that slides in cooperation with the guide groove is fixed on the end of the bracket frame plate b away from the connecting rod.

[0011] As a further solution of the utility model, a placement groove is provided on the top side surface of the bottom plate and is located directly below the heat sealing strip.

[0012] As a further solution of the utility model, a ball is rollingly connected to the side surface of the guide plate b that is slidably matched with the guide groove.

[0013] Compared with the prior art, the beneficial effects of the utility model are: the surface of the soft-pack lithium battery is repeatedly rolled and smoothed by the cooperation of the rolling component and the moving component, thereby effectively improving the sufficiency of air exhaust, exhausting the air inside the soft-pack lithium battery, removing the wrinkles on the surface of the aluminum foil layer, eliminating the gap between the aluminum foil layer and the battery cell of the lithium battery, and avoiding the problem of bulging of the soft-pack lithium battery after heat sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0015] Figure 1 It is a three-dimensional diagram of the overall structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the local structure of the placement slot of the utility model;

[0017] Figure 3 It is a schematic diagram of the three-dimensional structure of the rolling assembly of the utility model;

[0018] Figure 4 This is a front view structural diagram of the rolling assembly of the utility model;

[0019] Figure 5 It is a schematic diagram of the structure of the movable plate, the lower connecting plate and the heat sealing strip of the utility model.

[0020] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0021] 1. Rolling assembly; 101. Smoothing roller; 102. Bracket frame plate a; 103. Threaded rod; 104. Connector plate; 105. Slide groove; 106. Bump a; 2. Moving assembly; 201. Screw nut; 202. Guide plate a; 203. Connecting rod; 204. Guide slide; 205. Fixed plate; 206. Screw; 3. Bracket frame plate b; 4. Bracket plate; 5. Moving plate; 6. Electric telescopic rod; 7. Power supply; 8. Placement slot; 9. Lower connecting plate; 10. Heat sealing strip; 11. Bottom plate; 12. Servo motor; 13. Slide; 14. Guide groove; 15. Guide plate b; 16. Ball bearing; 17. Bump b. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the embodiments.

[0023] See also Figure 1-5The utility model provides a soft-pack lithium battery heat sealing mechanism, including a bottom plate 11, a bracket plate 4 is fixed on the top side of the bottom plate 11, an electric telescopic rod 6 is fixed at the top center of the bracket plate 4, a movable plate 5 is fixed on the output end of the electric telescopic rod 6, a lower connecting plate 9 is fixed on the bottom side of the movable plate 5, a heat sealing strip 10 is fixed on the bottom side of the lower connecting plate 9, a power supply 7 electrically connected to the heat sealing strip 10 is fixed on the top of the movable plate 5, a bracket frame plate b3 is arranged on the top of the bottom plate 11, a rolling component 1 for smoothing the aluminum foil of the soft-pack lithium battery is arranged in the bracket frame plate b3, and a moving component 2 is arranged on one side of the bracket frame plate b3; when in use, the soft-pack lithium battery is placed on the top surface of the bottom plate 11, the servo motor 12 is started to work, the servo motor 12 drives the moving component 2 to work, and the moving component 2 drives the bracket frame The rolling component 1 in the plate b3 moves back and forth above the soft-pack lithium battery, and the rolling component 1 rolls and smoothes the surface of the soft-pack lithium battery, so that the rolling component 1 and the moving component 2 cooperate to repeatedly roll and smooth the surface of the soft-pack lithium battery, effectively improving the sufficiency of air exhaust, exhausting the air inside the soft-pack lithium battery, removing wrinkles on the surface of the aluminum foil layer, eliminating the gap between the aluminum foil layer and the battery cell of the lithium battery, and avoiding the problem of bulging of the soft-pack lithium battery after heat sealing. Then, the electric telescopic rod 6 is started to work, and the output end of the electric telescopic rod 6 extends to drive the moving plate 5 to move downward, and the power supply 7 heats the heat sealing strip 10. The heat sealing strip 10 can be made of iron-chromium alloy. The moving plate 5 drives the heated heat sealing strip 10 at the bottom of the lower connecting plate 9 to descend to the side positions around the aluminum foil of the soft-pack lithium battery, and the aluminum foil package is pressed and heat-sealed by the heated heat sealing strip 10.

[0024] Further Figure 2 , Figure 3 and Figure 4As shown, it is worth specifically explaining that the rolling assembly 1 includes a bracket frame plate a102 arranged inside the bracket frame plate b3, and the two ends of the bracket frame plate a102 are rotatably connected with a smoothing roller 101, and the top center position of the bracket frame plate b3 is threadedly connected with a threaded rod 103, and the bottom end of the threaded rod 103 is rotatably connected with the top center position of the bracket frame plate a102, and two symmetrically distributed protrusions a106 are fixed at both ends of the bracket frame plate a102, and the two ends of the bracket frame plate b3 are provided with a slide groove 105 that is slidably adapted to the protrusion a106; when smoothing the surface of the soft-pack lithium battery, First, by rotating the threaded rod 103, the slide groove 105 limits and guides the protrusion a106, so that the rotating threaded rod 103 drives the bracket frame a102 to move, and the position of the smoothing roller 101 is adjusted by the moving bracket frame a102, so that the smoothing roller 101 contacts the surface of the soft-pack lithium battery, so that the surface of the soft-pack lithium battery is rolled and smoothed by the moving smoothing roller 101, the air inside the soft-pack lithium battery is discharged, the wrinkles on the surface of the aluminum foil layer are removed, and the gap between the aluminum foil layer and the battery cell of the lithium battery is eliminated, so as to avoid the problem of bulging of the soft-pack lithium battery after heat sealing.

[0025] Further as Figure 3 As shown, it is worth explaining in detail that a joint plate 104 is fixed to the top of the threaded rod 103, and a protrusion b17 is fixed on the side of the joint plate 104. There are multiple protrusions b17 and the multiple protrusions b17 are distributed in a ring shape; the threaded rod 103 is driven to rotate by rotating the joint plate 104, which is convenient for operation.

[0026] Further as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, it is worth explaining in detail that the moving assembly 2 includes two symmetrically distributed fixing plates 205 fixed on the top side of the bottom plate 11, and the two fixing plates 205 are connected to a screw rod 206 for common rotation, a servo motor 12 connected to one end of the screw rod 206 is fixed on the top of the bottom plate 11, a screw nut 201 is threadedly matched on the screw rod 206, a connecting rod 203 is fixed on the outer wall of one end of the bracket frame plate b3, and the end of the connecting rod 203 away from the bracket frame plate b3 is fixed to the outer surface of the screw nut 201, and a guide plate a202 is fixed to the bottom end of the screw nut 201, and the bottom A guide slide 204 that is slidably adapted to the guide plate a202 is fixed on the top side of the plate 11; during specific operation, the servo motor 12 is started to work, and the output end of the servo motor 12 drives the screw 206 to rotate, and the guide plate a202 is guided and limited by the guide slide 204, so that the screw 206 drives the screw nut 201 to move back and forth, and the screw nut 201 drives the bracket frame plate b3 and the rolling assembly 1 inside the bracket frame plate b3 to move back and forth through the connecting rod 203, thereby realizing reciprocating rolling and smoothing of the surface of the soft-pack lithium battery to remove air.

[0027] The scheme has the following working process: placing the soft-pack lithium battery on the top surface of the bottom plate 11, first rotating the threaded rod 103, and at the same time, the slide groove 105 limits and guides the protrusion a106, so that the rotating threaded rod 103 drives the bracket frame a102 to move, and the position of the smoothing roller 101 is adjusted by the moving bracket frame a102, so that the smoothing roller 101 contacts the surface of the soft-pack lithium battery, and the servo motor 12 is started to work, and the output end of the servo motor 12 drives the screw rod 206 to rotate, and the guide plate a202 is guided and limited by the guide slide 204, so that the screw rod 206 drives the screw nut 201 to reciprocate, and the screw nut 201 is connected to the connecting rod 203. The bracket frame b3 and the smoothing roller 101 inside the bracket frame b3 are driven to move back and forth, so that the surface of the soft-pack lithium battery is reciprocated and rolled and smoothed by the smoothing roller 101, the air inside the soft-pack lithium battery is discharged, the wrinkles on the surface of the aluminum foil layer are removed, and the gap between the aluminum foil layer and the battery cell of the lithium battery is eliminated, and then the electric telescopic rod 6 is started to work, and the output end of the electric telescopic rod 6 is extended to drive the movable plate 5 to move downward, and the power supply 7 heats the heat sealing strip 10. The heat sealing strip 10 can be made of iron-chromium alloy. The movable plate 5 drives the heated heat sealing strip 10 at the bottom of the lower connecting plate 9 to descend to the side positions around the aluminum foil of the soft-pack lithium battery, and the aluminum foil package is pressed and heat-sealed by the heated heat sealing strip 10.

[0028] Further Figure 2 and Figure 4 As shown, it is worth specifically explaining that a slide seat 13 is fixed on the top side surface of the bottom plate 11 and is located on the side of the bracket frame plate b3 away from the screw nut 201. A guide groove 14 is opened in the slide seat 13 along the length of the screw 206, and a guide plate b15 is fixed to the end of the bracket frame plate b3 away from the connecting rod 203 and is slidably matched with the guide groove 14; during specific operation, when the bracket frame plate b3 moves, the bracket frame plate b3 drives the guide plate b15 to slide in the guide groove 14, so that the end of the bracket frame plate b3 away from the connecting rod 203 is guided and limited by the cooperation of the guide plate b15 and the guide groove 14, thereby improving the stability of the bracket frame plate b3 and the rolling assembly 1 during movement, thereby improving the effect of the rolling assembly 1 on rolling and smoothing the surface of the soft-pack lithium battery.

[0029] Further Figure 1 and Figure 2 As shown, it is worth specifically explaining that a placement groove 8 is provided on the top side surface of the bottom plate 11 and is located directly below the heat sealing strip 10; during specific operation, the soft-pack lithium battery is placed in the placement groove 8, so that the soft-pack lithium battery is limited by the placement groove 8, thereby improving the accuracy of the heat sealing strip 10 in heat-sealing the side of the soft-pack lithium battery.

[0030] Further Figure 4As shown, it is worth explaining in detail that a ball 16 is rollingly connected on the side of the guide plate b15 that slides with the guide groove 14; during specific operation, the friction force of the guide plate b15 when sliding in the guide groove 14 is effectively reduced by the provided ball 16.

[0031] In summary: the rolling component 1 and the moving component 2 cooperate to repeatedly roll and smooth the surface of the soft-pack lithium battery, thereby effectively improving the adequacy of air exhaust, exhausting the air inside the soft-pack lithium battery, removing the wrinkles on the surface of the aluminum foil layer, eliminating the gap between the aluminum foil layer and the battery cell of the lithium battery, and avoiding the problem of bulging of the soft-pack lithium battery after heat sealing. The guide plate b15 and the guide groove 14 cooperate to guide and limit the end of the bracket frame plate b3 away from the connecting rod 203, thereby improving the stability of the bracket frame plate b3 and the rolling component 1 when moving, thereby improving the effect of the rolling component 1 on rolling and smoothing the surface of the soft-pack lithium battery. By placing the soft-pack lithium battery in the placement groove 8, the soft-pack lithium battery is limited by the placement groove 8, and the accuracy of the heat sealing package of the side of the soft-pack lithium battery by the heat sealing strip 10 is improved. The friction of the guide plate b15 when sliding in the guide groove 14 is effectively reduced by the provided ball 16.

[0032] The electric telescopic rod 6 and the servo motor 12 can be purchased on the market. The electric telescopic rod 6 and the servo motor 12 are equipped with a power supply, which is a mature technology in this field and has been fully disclosed, so they are not repeated in the specification.

Claims

1. A soft-pack lithium battery heat sealing mechanism, comprising a bottom plate, characterized in that: A bracket plate is fixed on the top side surface of the bottom plate, an electric telescopic rod is fixed at the top center position of the bracket plate, a movable plate is fixed on the output end of the electric telescopic rod, a lower connecting plate is fixed on the bottom side surface of the movable plate, a heat sealing strip is fixed on the bottom side surface of the lower connecting plate, a power supply electrically connected to the heat sealing strip is fixed on the top of the movable plate, a bracket frame plate b is arranged on the top of the bottom plate, a rolling component for smoothing the aluminum foil of the soft-pack lithium battery is arranged in the bracket frame plate b, and a movable component is arranged on one side of the bracket frame plate b.

2. The heat sealing mechanism for soft-pack lithium batteries according to claim 1, characterized in that: The rolling assembly includes a bracket frame plate a arranged inside a bracket frame plate b, both ends of the bracket frame plate a are rotatably connected with smoothing rollers, a threaded rod is threadedly connected to the top center position of the bracket frame plate b, the bottom end of the threaded rod is rotatably connected to the top center position of the bracket frame plate a, two symmetrically distributed protrusions a are fixed at both ends of the bracket frame plate a, and sliding grooves that are slidably adapted to the protrusions a are opened at both ends of the bracket frame plate b.

3. The heat sealing mechanism for soft-pack lithium batteries according to claim 2, characterized in that: A joint plate is fixed to the top of the threaded rod, and a convex block b is fixed to the side of the joint plate. A plurality of convex blocks b are provided and the plurality of convex blocks b are distributed in a ring shape.

4. The heat sealing mechanism for soft-pack lithium batteries according to claim 1, characterized in that: The moving assembly includes two symmetrically distributed fixed plates fixed on the top side of the base plate, and a screw rod is connected to the two fixed plates for common rotation. A servo motor connected to one end of the screw rod is fixed on the top of the base plate, and a screw nut is threaded on the screw rod. A connecting rod is fixed on the outer wall of one end of the bracket frame plate b, and the end of the connecting rod away from the bracket frame plate b is fixed to the outer surface of the screw nut, a guide plate a is fixed to the bottom end of the screw nut, and a guide slide seat slidably adapted to the guide plate a is fixed on the top side of the base plate.

5. The heat sealing mechanism for soft-pack lithium batteries according to claim 4, characterized in that: A slide seat is fixed on the top side of the bottom plate and is located on the side of the bracket frame plate b away from the screw nut. A guide groove is opened in the slide seat along the length of the screw. A guide plate b that slides with the guide groove is fixed on the end of the bracket frame plate b away from the connecting rod.

6. The heat sealing mechanism for soft-pack lithium batteries according to claim 4, characterized in that: A placement groove is provided on the top side surface of the bottom plate and is located just below the heat sealing strip.

7. The heat sealing mechanism for soft-pack lithium batteries according to claim 5, characterized in that: A ball is rollingly connected on the side surface of the guide plate b that is slidably matched with the guide groove.

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