Corner pressing device of soft package lithium battery

Abstract

The utility model provides a corner pressing device of a soft package lithium battery. The corner pressing device comprises a workbench, a rack, a corner pressing mechanism, a limiting part I for positioning a side sealing part of the soft package lithium battery, a limiting part II for positioning the edge of an unsealed area of the soft package lithium battery, and a limiting plate for positioning the bottom of the soft package lithium battery, the first limiting component and the second limiting component are oppositely arranged on the workbench and are adjustably connected with the workbench. The limiting plate is adjustably connected with the workbench, and the space among the first limiting component, the second limiting component and the limiting plate serves as a positioning station of the soft package lithium battery; the corner pressing mechanism is arranged on the rack, and the side portion of the limiting plate serves as a corner pressing station of the corner pressing mechanism. The corner pressing device disclosed by the utility model can be used for carrying out corner pressing treatment on the aluminum-plastic composite film close to the corner of the battery cell in the non-edge-sealed area, and effectively preventing the aluminum-plastic composite film close to the corner of the battery cell in the non-edge-sealed area from being cracked and damaged due to bending before a secondary packaging process, so that the performance of the soft-packaged lithium battery is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of battery manufacturing, and more specifically to an angle pressing device for a soft-pack lithium battery. Background Art

[0002] At present, the battery cells and electrolytes of soft-pack lithium batteries are generally packaged with aluminum-plastic composite films. During the packaging process, the battery cells are first placed in the punched holes of the aluminum-plastic composite film, and the aluminum-plastic composite film is folded in half for top and side sealing, leaving an air bag edge for injecting electrolyte. After the electrolyte is injected, formation is carried out. The gas generated during the formation process and the overflowing electrolyte will run into the air bag. After formation, the air bag edge is trimmed and repackaged to prevent the electrolyte from being exposed.

[0003] After the aluminum-plastic composite film is folded in half for top and side sealing and then in the secondary packaging process, it is also necessary to go through the processes of impedance measurement, electrolyte injection, pre-vacuuming, formation and voltage measurement. Since the air bag edge has not been sealed, the area where the battery cell and the unsealed area meet has a certain height difference and becomes the support point for bending. The corner of the unsealed area near the battery cell will become an easy bending area. If it is bent many times, it is easy to cause fatigue of the aluminum-plastic composite film at the corner of the unsealed area near the battery cell and produce cracks and damage. Once cracks and damage occur, water vapor can enter the battery and react with lithium hexafluorophosphate to produce gas, causing battery cell inflation, voltage reduction, capacity reduction, and even electrolyte leakage, thereby affecting the performance of the soft-pack lithium battery. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings and deficiencies in the prior art and to provide a corner pressing device for a soft-pack lithium battery. The corner pressing device can perform corner pressing on the aluminum-plastic composite film at the corner of the unsealed area close to the battery cell, and effectively prevent the aluminum-plastic composite film at the corner of the unsealed area close to the battery cell from being cracked or damaged due to bending before the secondary packaging process, thereby ensuring the performance of the soft-pack lithium battery.

[0005] In order to achieve the above-mentioned purpose, the utility model is implemented through the following technical solutions: a corner pressing device for a soft-pack lithium battery, characterized in that it includes a workbench, a frame, a corner pressing mechanism, a limiting component 1 for positioning the side seal of the soft-pack lithium battery, a limiting component 2 for positioning the edge of the unsealed area of ​​the soft-pack lithium battery, and a limiting plate for positioning the bottom of the soft-pack lithium battery; the limiting component 1 and the limiting component 2 are arranged on the workbench opposite to each other, and are adjustably connected to the workbench respectively; the limiting plate is adjustably connected to the workbench, and the limiting component 1, the limiting component 2 and the limiting plate serve as a positioning station for the soft-pack lithium battery; the corner pressing mechanism is arranged on the frame, and the side of the limiting plate serves as the corner pressing station of the corner pressing mechanism, and the corner position of the soft-pack lithium battery positioned at the positioning station is located at the corner pressing station, and the corner position is the corner position of the unsealed area close to the battery cell.

[0006] In the above scheme, the angle pressing mechanism of the utility model performs angle pressing on the aluminum-plastic composite film at the corner of the soft-pack lithium battery positioned on the positioning station. Since there is no height difference between the area where the angle is pressed and the area connected to the unsealed edge area, the area is not easy to bend. In this way, before the secondary packaging process of the soft-pack lithium battery, the aluminum-plastic composite film at the corner of the unsealed edge area close to the battery cell can be effectively prevented from being cracked and damaged due to bending, thereby ensuring the performance of the soft-pack lithium battery. In addition, the limiting component 1, the limiting component 2 and the limiting plate are all adjustably connected to the workbench, so that the positioning station of the soft-pack lithium battery between the three can be adjusted according to the specifications of the soft-pack lithium battery, thereby improving the practicality and versatility of the angle pressing device.

[0007] The limiting component 1 and the limiting component 2 are flush with the edge of the workbench close to the limiting plate.

[0008] The first limiting component and the second limiting component are adjustably connected to the workbench along a horizontal direction respectively, and the horizontal direction is the length direction of the workbench.

[0009] The limiting component 1 and the limiting component 2 have the same structure and both include a limiting plate and a fastening assembly; the limiting plate has an adjusting long hole at the beginning, and after the limiting plate is adjusted in position in the horizontal direction, the fastening assembly is passed through the adjusting long hole to lock the limiting plate.

[0010] The limiting plate is adjustably connected to the side of the workbench along a vertical direction, and the vertical direction is the width direction of the workbench.

[0011] The angle pressing device also includes an adjusting screw and a locking nut; the adjusting screw is arranged on the side of the workbench, and the limit plate is passed through the adjusting screw. After the limit plate is adjusted in the vertical direction, it is locked by the locking nut.

[0012] The angle pressing mechanism includes a driving component, a connecting seat, a pressing plate and a pressing block assembly; the pressing plate is detachably connected to the side of the workbench and is located on the side of the limiting plate; the pressing block assembly is detachably connected to the connecting seat and is located above the pressing plate; the driving component is arranged on the frame and connected to the connecting seat to drive the pressing block assembly on the connecting seat to descend so as to press the corner of the soft-pack lithium battery.

[0013] The pressing block assembly includes a connecting block and a pressing block arranged on the connecting block; the connecting block is detachably connected to the connecting seat; the end of the pressing block and the end of the pressing plate are both provided with a missing corner position, and the space between the pressing block and the pressing plate serves as a pressing corner position. The design of the missing corner position of the utility model can effectively prevent the pressing block from pressing the battery cell, thereby protecting the battery cell.

[0014] The angle pressing mechanism also includes a guide rod for guiding; the guide rod is arranged on the frame, and the connecting block is passed through the guide rod.

[0015] The workbench includes a platform, a base and an adjustment component; the adjustment component includes a screw, the base is provided with a screw hole, the screw passes through the platform and is connected with the screw hole to achieve an adjustable connection between the platform and the base; the screw is passed through a buffer spring. The platform of the utility model can also adjust the height according to actual needs.

[0016] The angle pressing device of the soft-pack lithium battery of the utility model works as follows: the position of the limiting component 1, the limiting component 2 and the limiting plate are adjusted according to the size of the soft-pack lithium battery, and the soft-pack lithium battery is positioned at the positioning station. The limiting component 1 limits the side seal of the soft-pack lithium battery, and the limiting component 2 limits the edge of the unsealed edge area of ​​the soft-pack lithium battery. The soft-pack lithium battery is moved so that its bottom is against the limiting plate. At this time, the corner of the soft-pack lithium battery is located at the angle pressing station. The control driving component drives the pressing block assembly on the connecting seat to descend, and the pressing block performs angle pressing on the corner of the soft-pack lithium battery at the angle pressing station.

[0017] Compared with the prior art, the utility model has the following advantages and beneficial effects: the corner pressing device of the soft-pack lithium battery of the utility model can perform corner pressing treatment on the aluminum-plastic composite film at the corner of the unsealed area close to the battery cell, and effectively prevent the aluminum-plastic composite film at the corner of the unsealed area close to the battery cell from being cracked or damaged due to bending before the secondary packaging process, thereby ensuring the performance of the soft-pack lithium battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the angle pressing device of the soft-pack lithium battery of the utility model Figure 1 ;

[0019] Figure 2 This is a schematic diagram of the angle pressing device of the soft-pack lithium battery of the utility model Figure 2 ;

[0020] Figure 3 It is a side schematic diagram of the angle pressing device of the soft-pack lithium battery of the utility model;

[0021] Figure 4 It is a schematic diagram of the soft-pack lithium battery of the utility model;

[0022] Among them, 1 is a frame, 2 is a soft-pack lithium battery, 2.1 is a side seal, 2.2 is an unsealed edge area, 2.3 is a bottom, 2.4 is a battery cell, 2.5 is a corner position, 3 is a limiting component one, 4 is a limiting component two, 5 is a limiting plate, 6 is a workbench, 6.1 is a platform, 6.2 is a base, 6.3 is a screw, 6.4 is a buffer spring, 7 is a limiting plate, 7.1 is an adjusting long hole, 8 is a limiting screw, 9 is a limiting nut, 10 is an adjusting screw, 11 is a locking nut, 12 is a driving component, 13 is a connecting seat, 14 is a pressure plate, 15 is a connecting block, 16 is a pressure block, 17 is a missing corner position, and 18 is a guide rod. DETAILED DESCRIPTION

[0023] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific implementations.

[0024] Example

[0025] like Figures 1 to 4 As shown, the angle pressing device of the soft-pack lithium battery of the utility model comprises a workbench 6, a frame 1, an angle pressing mechanism, a limiting component 13 for positioning the side seal 2.1 of the soft-pack lithium battery 2, a limiting component 24 for positioning the edge of the unsealed area 2.2 of the soft-pack lithium battery, and a limiting plate 5 for positioning the bottom 2.3 of the soft-pack lithium battery, wherein the limiting component 13 and the limiting component 24 are arranged on the workbench 6 relatively, and are adjustably connected to the workbench 6 respectively, and the limiting plate 5 is adjustably connected to the workbench 6, and the limiting component 13, the limiting component 24 and the limiting plate 5 are used as the positioning position of the soft-pack lithium battery 2, the angle pressing mechanism is arranged on the frame 1, and the side of the limiting plate 5 is used as the angle pressing position of the angle pressing mechanism, and the corner position 2.5 of the soft-pack lithium battery 2 positioned at the positioning position is located at the angle pressing position, and the corner position 2.5 is the corner position of the unsealed area 2.2 close to the battery cell 2.4.

[0026] Specifically, the limiting component 1 3 and the limiting component 2 4 are flush with the edge of the workbench 6 near the limiting plate 5, and the limiting component 1 3 and the limiting component 2 4 are respectively adjustably connected to the workbench 6 in the horizontal direction, and the horizontal direction is the length direction of the workbench 6. In addition, the limiting component 1 3 and the limiting component 2 4 have the same structure, both including a limiting plate 7, a limiting screw 8 and a limiting nut 9. The limiting plate 7 has an adjustment long hole 7.1 at the beginning. After the limiting plate 7 is adjusted in the horizontal direction, the limiting screw 8 is inserted through the limiting nut 9 and the adjustment long hole 7.1 to lock the limiting plate 7.

[0027] The limit plate 5 of the utility model is adjustably connected to the side of the workbench 6 along the vertical direction, and the vertical direction is the width direction of the workbench 6. The angle pressing device also includes an adjusting screw 10 and a locking nut 11, wherein the adjusting screw 10 is arranged on the side of the workbench 6, and the limit plate 5 is passed through the adjusting screw 10. After the limit plate 5 is adjusted in the vertical direction, it is locked by the locking nut 11.

[0028] The angle pressing mechanism of the utility model includes a driving component 12, a connecting seat 13, a pressing plate 14 and a pressing block assembly, wherein the pressing plate 14 is detachably connected to the side of the workbench 1 and is located on the side of the limit plate 5, the pressing block assembly is detachably connected to the connecting seat 13 and is located above the pressing plate 14, and the driving component 12 is arranged on the frame 1 and connected to the connecting seat 13, so as to drive the pressing block assembly on the connecting seat 13 to descend to press the corner position 2.5 of the soft-pack lithium battery 2. The pressing block assembly includes a connecting block 15 and a pressing block 16 arranged on the connecting block 15, wherein the connecting block 15 is detachably connected to the connecting seat 13, and the end of the pressing block 16 and the end of the pressing plate 14 are both provided with a missing corner position 17, and the space between the pressing block 16 and the pressing plate 14 serves as an angle pressing station. The design of the missing corner position 17 of the utility model can effectively prevent the pressing block 16 from pressing the battery cell 2.4, thereby protecting the battery cell 2.4. The angle pressing mechanism further comprises a guide rod 18 for guiding. The guide rod 18 is arranged on the frame 1 , and the connecting block 15 is passed through the guide rod 18 .

[0029] The workbench 6 of the utility model comprises a platform 6.1, a base 6.2 and an adjustment component, wherein the adjustment component comprises a screw 6.3, the base 6.2 is provided with a screw hole, the screw 6.3 passes through the platform 6.1 and is connected with the screw hole to realize an adjustable connection between the platform 6.1 and the base 6.2, and in addition, a buffer spring 6.4 is passed through the screw 6.3. The platform 6.1 of the utility model can also be adjusted in height according to actual needs.

[0030] The angle pressing device of the soft-pack lithium battery of the utility model works as follows: the position of the limiting component 1 3, the limiting component 2 4 and the limiting plate 5 are adjusted according to the size of the soft-pack lithium battery 2, and the soft-pack lithium battery 2 is positioned at the positioning station. The limiting component 1 3 limits the side seal 2.1 of the soft-pack lithium battery 2, and the limiting component 2 4 limits the edge of the unsealed edge area 2.2 of the soft-pack lithium battery 2. The soft-pack lithium battery 2 is moved so that its bottom 2.3 is attached to the limiting plate 5. At this time, the corner 2.5 of the soft-pack lithium battery 2 is located at the angle pressing station. The control driving component 12 drives the pressing block assembly on the connecting seat 13 to descend, and the pressing block 16 performs angle pressing on the corner 2.5 of the soft-pack lithium battery 2 at the angle pressing station.

[0031] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited by the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principle of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A corner pressing device for a soft-pack lithium battery, characterized in that: It includes a workbench, a frame, a pressing angle mechanism, a limiting component 1 for positioning the side seal of a soft-pack lithium battery, a limiting component 2 for positioning the edge of an unsealed area of ​​the soft-pack lithium battery, and a limiting plate for positioning the bottom of the soft-pack lithium battery; the limiting component 1 and the limiting component 2 are arranged on the workbench opposite to each other, and are adjustably connected to the workbench respectively; the limiting plate is adjustably connected to the workbench, and the limiting component 1, the limiting component 2 and the limiting plate serve as positioning positions for the soft-pack lithium battery; the pressing angle mechanism is arranged on the frame, and the side of the limiting plate serves as the pressing angle position of the pressing angle mechanism, and the corner position of the soft-pack lithium battery positioned at the positioning position is located at the pressing angle position, and the corner position is the corner position of the unsealed area close to the battery cell.

2. The angle pressing device for a soft-pack lithium battery according to claim 1, characterized in that: The limiting component 1 and the limiting component 2 are flush with the edge of the workbench close to the limiting plate.

3. The angle pressing device for a soft-pack lithium battery according to claim 1, characterized in that: The first limiting component and the second limiting component are adjustably connected to the workbench along a horizontal direction respectively, and the horizontal direction is the length direction of the workbench.

4. The angle pressing device for a soft-pack lithium battery according to claim 3, characterized in that: The limiting component 1 and the limiting component 2 have the same structure and both include a limiting plate and a fastening assembly; the limiting plate has an adjusting long hole at the beginning, and after the limiting plate is adjusted in position in the horizontal direction, the fastening assembly is passed through the adjusting long hole to lock the limiting plate.

5. The angle pressing device for a soft-pack lithium battery according to claim 1, characterized in that: The limiting plate is adjustably connected to the side of the workbench along a vertical direction, and the vertical direction is the width direction of the workbench.

6. The angle pressing device for a soft-pack lithium battery according to claim 5, characterized in that: The angle pressing device also includes an adjusting screw and a locking nut; the adjusting screw is arranged on the side of the workbench, and the limit plate is passed through the adjusting screw. After the limit plate is adjusted in the vertical direction, it is locked by the locking nut.

7. The angle pressing device for a soft-pack lithium battery according to claim 1, characterized in that: The angle pressing mechanism includes a driving component, a connecting seat, a pressing plate and a pressing block assembly; the pressing plate is detachably connected to the side of the workbench and is located on the side of the limiting plate; the pressing block assembly is detachably connected to the connecting seat and is located above the pressing plate; the driving component is arranged on the frame and connected to the connecting seat to drive the pressing block assembly on the connecting seat to descend so as to press the corner of the soft-pack lithium battery.

8. The angle pressing device for a soft-pack lithium battery according to claim 7, characterized in that: The pressing block assembly comprises a connecting block and a pressing block arranged on the connecting block; the connecting block is detachably connected to the connecting seat; the end of the pressing block and the end of the pressing plate are both provided with a missing corner position, and the area between the pressing block and the pressing plate serves as a corner pressing station.

9. The angle pressing device for a soft-pack lithium battery according to claim 7, characterized in that: The angle pressing mechanism also includes a guide rod for guiding; the guide rod is arranged on the frame, and the connecting block is passed through the guide rod.

10. The angle pressing device for a soft-pack lithium battery according to claim 1, characterized in that: The workbench includes a platform, a base and an adjustment component; the adjustment component includes a screw, the base is provided with a screw hole, the screw passes through the platform and is connected with the screw hole to realize an adjustable connection between the platform and the base; a buffer spring is passed through the screw.

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