Valve device on aluminum-plastic film of soft package lithium battery

Abstract

The utility model relates to soft package lithium cell technical field, concretely is a kind of soft package lithium cell aluminium plastic film upper valve device, it mainly includes: bottom plate;Heating component;Downward pressing component and positioning component.The position of aluminium plastic film left and right is positioned by adjusting the position of side positioning block, the position of head and material table can be adjusted according to actual process requirement, improve the versatility of device, can adapt to the production demand of multiple varieties, small batch, and when there is deviation in aluminium plastic film and exhaust valve position, effective compensation can be carried out, guarantee the welding precision, and through the length of limit screw extension guide rod mounting plate and limit plate cooperation, the downward stroke of cylinder can be controlled, reach the downward degree of control head, and then the downward pressure degree and contact depth of head can be flexibly adjusted according to material characteristics, valve body thickness and process requirement, guarantee the best welding effect.

Description

Technical Field

[0001] This utility model relates to the field of soft-pack lithium battery technology, specifically to a valve device for an aluminum-plastic film on a soft-pack lithium battery. Background Technology

[0002] During the formation process of pouch lithium batteries, gases generated from the decomposition of water and electrolyte reactions can cause the sealed aluminum-plastic film to expand in volume. If these gases are not released in time, the aluminum-plastic film can deform or even rupture. To prevent this, a one-way valve needs to be welded to the gas pocket on the aluminum-plastic film to release the gases generated inside the battery in real time during the formation process, thus ensuring that the aluminum-plastic film of the battery cell does not deform due to gas generation.

[0003] Different models of soft-pack lithium batteries or different designs of aluminum-plastic film airbags may have different positions. This requires the upper valve device to be able to flexibly adjust the relative position between the end cap (heat-sealing actuator) and the material platform (positioning platform supporting the aluminum-plastic film) to ensure precise alignment of the exhaust valve and the aluminum-plastic film airbag area. However, existing devices typically use a fixed structure design, and the relative position of the end cap and the material platform cannot be adjusted according to actual process requirements. This results in poor device versatility, making it difficult to adapt to the needs of multi-variety, small-batch production, or to effectively address deviations in the positions of the aluminum-plastic film and the exhaust valve. Compensation affects welding accuracy; during the heat sealing process, the pressure and contact depth (i.e., end cap stroke) applied by the end cap to the aluminum-plastic film and the exhaust valve are key parameters affecting welding quality. Insufficient pressure or inadequate contact will lead to weak welding and poor sealing; excessive pressure or excessive contact may cause over-melting, damage or even perforation of the aluminum-plastic film. However, existing devices usually adopt a fixed stroke design, which cannot flexibly adjust the downward pressure and contact depth of the end cap according to material characteristics, valve body thickness and process requirements, resulting in a lack of controllability in the welding process and difficulty in achieving the best welding effect. Utility Model Content

[0004] The purpose of this invention is to provide a valve device for an aluminum-plastic film on a soft-pack lithium battery to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A valve device for an aluminum-plastic film on a soft-pack lithium battery, comprising an aluminum-plastic film and a valve, including: Base plate; Heating components, mounted on the base plate, are used to fuse the valve to the aluminum-plastic film; The pressing component is mounted on the base plate, and the heating component is mounted on the pressing component. The pressing component is used to drive the heating component to move. Positioning components, mounted on the base plate, are used for positioning valves and / or aluminum-plastic diaphragms.

[0006] Preferably, the pressing component includes a side plate, which is installed on both sides of the top of the base plate. A cylinder mounting plate is installed on the top of the side plate, and a driving component is provided on the cylinder mounting plate. The driving component passes through the cylinder mounting plate, and the bottom of the driving component is connected to a head mounting plate. The driving component is used to drive the head mounting plate to move up and down. The heating component is provided on the head mounting plate.

[0007] Preferably, the driving component includes a cylinder, which is fixed to the top of the cylinder mounting plate with the output end of the cylinder facing upward. A guide rod mounting plate is connected to the top of the cylinder, and connectors are provided on both sides of the bottom of the guide rod mounting plate. The connectors pass through the cylinder mounting plate and are connected to the end cap mounting plate.

[0008] Preferably, the connecting component includes a linear bearing that passes through and is fixed to the cylinder mounting plate. The linear bearing is hollow, and a guide rod is slidably disposed inside the linear bearing. The top of the guide rod is connected to the guide rod mounting plate, and the bottom of the guide rod is connected to the end cap mounting plate.

[0009] Preferably, a limit plate is fixedly installed on the cylinder, and the output end of the cylinder passes through the limit plate.

[0010] Preferably, a limiting screw is provided on the guide rod mounting plate, and the limiting screw is screwed to the guide rod mounting plate.

[0011] Preferably, the heating component includes a heat insulation block, which is fixed to the bottom of the end cap mounting plate. The bottom of the heat insulation block is connected to the end cap, and a heating ring is installed on the surface of the end cap.

[0012] Preferably, the positioning component includes a material platform mounting plate, which is disposed on the top of the base plate, and a material platform is provided at the top of the material platform mounting plate for placing the valve.

[0013] Preferably, a rear positioning stop bar is installed on the top of the material platform, and the rear positioning stop bar has an "L" shaped structure.

[0014] Preferably, a side positioning block is slidably disposed above the rear positioning stop bar.

[0015] Compared with the prior art, the beneficial effects of this utility model are: This invention allows for front-to-back adjustment of the material platform mounting plate via threaded hole four, and left-to-right adjustment of the material platform via waist hole two, ensuring that the center of through hole one is coaxial with the center of the end cap. The position of the rear positioning stop bar can be adjusted front-to-back via slot one, thus adjusting the front-to-back position of the aluminum-plastic film. The left-to-right position of the aluminum-plastic film is positioned by adjusting the position of the side positioning block. The positions of the end cap and the material platform can be adjusted according to actual process requirements, improving the versatility of the device and adapting to the needs of multi-variety, small-batch production. It can also effectively compensate for deviations in the positions of the aluminum-plastic film and the exhaust valve, ensuring welding accuracy. Furthermore, the length of the guide rod mounting plate extended by the limit screw, in conjunction with the limit plate, controls the downward stroke of the cylinder, thereby controlling the degree of pressure applied to the end cap. This allows for flexible adjustment of the downward pressure and contact depth of the end cap based on material characteristics, valve body thickness, and process requirements, ensuring optimal welding results. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the pressing component; Figure 3 This is a schematic diagram of the structure of the insulation block and the end cap; Figure 4 This is a schematic diagram of the three-dimensional structure of the base plate and the material platform; Figure 5 This is a schematic diagram of the explosion of the aluminum-plastic membrane and the valve. Figure 6 This is a schematic diagram of the aluminum-plastic membrane and valve.

[0017] In the diagram: 1. Base plate; 1-1. Countersunk hole one; 1-2. Threaded hole one; 2. Side plate; 2-1. Threaded hole two; 2-2. Threaded hole three; 3. Material platform mounting plate; 3-1. Waist hole one; 3-2. Threaded hole four; 4. Material platform; 4-1. Waist hole two; 4-2. Through hole one; 4-3. Threaded hole five; 4-4. Threaded hole six; 5. Rear positioning stop; 5-1. Groove one; 6. Side positioning block; 6-1. Groove two; 6-2. Threaded hole seven; 7. Cylinder mounting plate; 7-1. Through hole two; 7-2. Threaded hole eight; 7-3 1. Through hole three; 8. Guide rod mounting plate; 8-1. Edge hole; 8-2. Threaded hole nine; 8-3. Center hole; 9. Guide rod; 10. Linear bearing; 11. Limiting plate; 12. Limiting screw; 13. Cylinder; 14. End cap mounting plate; 14-1. Countersunk hole two; 14-2. Threaded hole ten; 15. Heat insulation block; 15-1. Mounting through hole; 15-2. Connecting through hole; 16. End cap; 16-1. Threaded hole eleven; 16-2. Inspection hole; 17. Aluminum-plastic film; 18. Valve; 18-1. Cylindrical; 18-2. Ring. Detailed Implementation

[0018] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0019] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0020] like Figures 1-4 As shown, this application provides a valve device on an aluminum-plastic film for a soft-pack lithium battery, involving an aluminum-plastic film 17 and a valve 18, including: a base plate 1; a heating component disposed on the base plate 1 for welding the valve 18 to the aluminum-plastic film 17; a pressing component disposed on the base plate 1, and the heating component is disposed on the pressing component, the pressing component being used to drive the heating component to move; and a positioning component disposed on the base plate 1 for positioning the valve 18 and / or the aluminum-plastic film 17.

[0021] Specifically, such as Figure 2 As shown, the pressing component includes a side plate 2, which is installed on both sides of the top of the base plate 1. A cylinder mounting plate 7 is installed on the top of the side plate 2. A driving component is provided on the cylinder mounting plate 7. The driving component passes through the cylinder mounting plate 7 and the bottom of the driving component is connected to the end plate mounting plate 14. The driving component is used to drive the end plate mounting plate 14 to move up and down. The heating component is provided on the end plate mounting plate 14.

[0022] The base plate 1 has a countersunk hole 1-1, and the side plate 2 has a threaded hole 2-1 at the position corresponding to the countersunk hole 1-1. The side plate 2 is installed on the base plate 1 by screws passing through the threaded hole 2-1 and the countersunk hole 1-1. The top of the side plate 2 has a threaded hole 3-2-2, and the cylinder mounting plate 7 has a through hole 7-1 at the position corresponding to the threaded hole 3-2-2. The cylinder mounting plate 7 is installed on the side plate 2 by screws passing through the threaded hole 3-2-2 and the through hole 7-1.

[0023] Specifically, such as Figure 2 As shown, the driving component includes a cylinder 13, which is fixed on the top of the cylinder mounting plate 7, with the output end of the cylinder 13 facing upward. A guide rod mounting plate 8 is connected to the top of the cylinder 13, and connectors are provided on both sides of the bottom of the guide rod mounting plate 8. The connectors pass through the cylinder mounting plate 7 and are connected to the end cap mounting plate 14.

[0024] The cylinder mounting plate 7 has a threaded hole 8-2 for fixing the cylinder 13, and the guide rod mounting plate 8 has a central hole 8-3 for fixing the output end of the cylinder 13 into the central hole 8-3.

[0025] Specifically, such as Figure 2 As shown, the connecting component includes a linear bearing 10, which passes through the cylinder mounting plate 7 and is fixed on the cylinder mounting plate 7. The linear bearing 10 is hollow, and a guide rod 9 is slidably arranged inside the linear bearing 10. The top of the guide rod 9 is connected to the guide rod mounting plate 8, and the bottom of the guide rod 9 is connected to the end cap mounting plate 14.

[0026] The cylinder mounting plate 7 has a through hole 3 7-3. The linear bearing 10 is provided with a flange. The linear bearing 10 passes through the through hole 3 7-3 and is fixed to the cylinder mounting plate 7 by the flange. The guide rod mounting plate 8 has an edge hole 8-1 at the position corresponding to the guide rod 9. The top end of the guide rod 9 is fixed in the edge hole 8-1. The end cap mounting plate 14 has a countersunk hole 2 14-1. The bottom end of the guide rod 9 is fixed in the countersunk hole 2 14-1.

[0027] Specifically, such as Figure 2 As shown, a limit plate 11 is fixedly installed on the cylinder 13, and the output end of the cylinder 13 passes through the limit plate 11; a limit screw 12 is provided on the guide rod mounting plate 8, and the limit screw 12 is screwed to the guide rod mounting plate 8.

[0028] The guide rod mounting plate 8 has a threaded hole 9-2. The limit screw 12 is screwed into the threaded hole 9-2. By extending the limit screw 12 out of the guide rod mounting plate 8 and cooperating with the limit plate 11, the downward stroke of the cylinder 13 can be controlled, thereby controlling the downward pressure of the end cap 16.

[0029] Specifically, such as Figures 2-3 As shown, the heating component includes a heat insulation block 15, which is fixed to the bottom of the end cap mounting plate 14. The bottom of the heat insulation block 15 is connected to an end cap 16, and a heating ring is installed on the surface of the end cap 16.

[0030] The heat insulation block 15 has a mounting through hole 15-1, and the end cap 16 has a threaded hole 16-1. The end cap 16 is fixed to the bottom of the heat insulation block 15 by screws passing through the mounting through hole 15-1 and the threaded hole 16-1. The end cap mounting plate 14 has a threaded hole 14-2, and the heat insulation block 15 has a connecting through hole 15-2 at the position corresponding to the threaded hole 14-2. The heat insulation block 15 is installed onto the end cap mounting plate 14 by screws passing through the threaded hole 14-2 and the connecting through hole 15-2. The end cap 16 has a detection hole 16-2 for installing a temperature detection device.

[0031] The heat insulation block 15 is made of imported synthetic stone or Teflon and other high-temperature resistant heat insulation materials, which can effectively isolate the heat generated by the end cap 16, avoid the life reduction of the limit plate 11 and cylinder 13 due to high temperature, and also effectively prevent heat loss and personnel burn risk caused by heat diffusion to the whole equipment.

[0032] Specifically, such as Figures 4-6 As shown, the positioning component includes a material platform mounting plate 3, which is set on the top of the base plate 1. A material platform 4 is set on the top of the material platform mounting plate 3, which is used to place the valve 18. A rear positioning stop bar 5 is installed on the top of the material platform 4. The rear positioning stop bar 5 has an "L" shaped structure. A side positioning block 6 is slidably set above the rear positioning stop bar 5.

[0033] The base plate 1 has a threaded hole 1-2. The platform mounting plate 3 has a slotted hole 3-1. The platform mounting plate 3 is installed on the base plate 1 by screws passing through the slotted hole 3-1 and the threaded hole 1-2. The platform mounting plate 3 also has a threaded hole 4-2. The platform 4 has a slotted hole 4-1. The platform 4 is installed on the platform mounting plate 3 by screws passing through the slotted hole 4-1 and the threaded hole 4-2. The platform 4 has a through hole 4-2 for placing the valve 18. The platform 4 has a threaded hole 4-3. A set screw is screwed into the threaded hole 4-3. The level of the material platform 4 can be adjusted. The material platform 4 is also provided with a threaded hole 4-4. The rear positioning stop 5 is provided with a slot 5-1. The rear positioning stop 5 is installed on the material platform 4 by passing a screw through the slot 5-1 and the threaded hole 4-4. The side positioning block 6 is provided with a slot 6-1. The side positioning block 6 is secured to the rear positioning stop 5 by passing a screw through the slot 6-1. The side positioning block 6 is provided with a threaded hole 6-2. The side positioning block 6 can be fixed by passing a screw through the threaded hole 6-2. The valve 18 is composed of a cylinder 18-1 and a ring 18-2.

[0034] The specific details of this plan are as follows: Place valve 18 in through hole 4-2, then adjust the set screw in threaded hole 4-3 to ensure the material platform 4 is level. Next, place aluminum-plastic film 17 on the material platform 4. The rear positioning stop 5 positions the front and rear sides of aluminum-plastic film 17. Adjusting the position of the side positioning block 6 on the rear positioning stop 5 positions the left and right sides of aluminum-plastic film 17. After positioning, start cylinder 13. Cylinder 13 will move guide rod mounting plate 8 downwards. Guide rod mounting plate 8, through guide rod 9, will move end cap mounting plate 14 downwards. End cap mounting plate 14, through heat insulation block 15, will move end cap 16 downwards. The heating ring on the surface of end cap 16 heats end cap 16 until end cap 16 contacts aluminum-plastic film 17 and valve 18, fusing aluminum-plastic film 17 and ring 18-2 together. The position of material platform mounting plate 3 can be adjusted forward and backward through threaded hole 3-2, and the position of material platform 4 can be adjusted through waist hole 4-1. The left and right adjustments ensure that the center of the through hole 4-2 is coaxial with the center of the end cap 16. The position of the rear positioning stop 5 can be adjusted forward and backward through the slot 5-1 to adjust the forward and backward position of the aluminum-plastic film 17. The left and right positions of the aluminum-plastic film 17 can be positioned by adjusting the position of the side positioning block 6. The positions of the end cap 16 and the material table 4 can be adjusted according to actual process requirements, improving the versatility of the device and adapting to the production needs of multiple varieties and small batches. It can also effectively compensate for deviations in the positions of the aluminum-plastic film and the exhaust valve, ensuring welding accuracy. Furthermore, by extending the guide rod mounting plate 8 through the limit screw 12 and cooperating with the limit plate 11, the downward stroke of the cylinder 13 can be controlled to control the downward pressure of the end cap 16. Thus, the downward pressure and contact depth of the end cap can be flexibly adjusted according to material characteristics, valve body thickness, and process requirements, ensuring the best welding effect.

[0035] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary; within the framework of this invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of this invention as described above, which are not provided in the details for the sake of brevity.

[0036] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A valve device on an aluminum-plastic film for a soft-pack lithium battery, comprising an aluminum-plastic film (17) and a valve (18), characterized in that, include: Base plate (1); A heating element is disposed on the base plate (1) for welding the valve (18) to the aluminum-plastic film (17); A pressing component is disposed on the base plate (1), and the heating component is disposed on the pressing component. The pressing component is used to drive the heating component to move. A positioning component is provided on the base plate (1) for positioning the valve (18) and / or the aluminum-plastic membrane (17).

2. The valve device for an aluminum-plastic film upper part of a soft-pack lithium battery according to claim 1, characterized in that, The pressing component includes a side plate (2), which is installed on both sides of the top of the bottom plate (1). A cylinder mounting plate (7) is installed on the top of the side plate (2). A driving component is provided on the cylinder mounting plate (7). The driving component passes through the cylinder mounting plate (7), and the bottom of the driving component is connected to a head mounting plate (14). The driving component is used to drive the head mounting plate (14) to move up and down. The heating component is provided on the head mounting plate (14).

3. The valve device for an aluminum-plastic film on a soft-pack lithium battery according to claim 2, characterized in that, The driving component includes a cylinder (13), which is fixed to the top of the cylinder mounting plate (7) with the output end of the cylinder (13) facing upward. A guide rod mounting plate (8) is connected to the top of the cylinder (13), and connectors are provided on both sides of the bottom of the guide rod mounting plate (8). The connectors pass through the cylinder mounting plate (7) and are connected to the end cap mounting plate (14).

4. The valve device for an aluminum-plastic film upper part of a soft-pack lithium battery according to claim 3, characterized in that, The connecting component includes a linear bearing (10), which passes through the cylinder mounting plate (7) and is fixed on the cylinder mounting plate (7). The linear bearing (10) is hollow, and a guide rod (9) is slidably disposed inside the linear bearing (10). The top of the guide rod (9) is connected to the guide rod mounting plate (8), and the bottom of the guide rod (9) is connected to the end cap mounting plate (14).

5. The valve device for an aluminum-plastic film upper part of a soft-pack lithium battery according to claim 4, characterized in that, A limiting plate (11) is fixedly installed on the cylinder (13), and the output end of the cylinder (13) passes through the limiting plate (11).

6. The valve device for an aluminum-plastic film upper part of a soft-pack lithium battery according to claim 5, characterized in that, A limiting screw (12) is provided on the guide rod mounting plate (8), and the limiting screw (12) is screwed to the guide rod mounting plate (8).

7. The valve device for an aluminum-plastic film on a soft-pack lithium battery according to claim 6, characterized in that, The heating component includes a heat insulation block (15), which is fixed to the bottom of the end cap mounting plate (14). The bottom of the heat insulation block (15) is connected to an end cap (16), and a heating ring is installed on the surface of the end cap (16).

8. The valve device for an aluminum-plastic film upper part of a soft-pack lithium battery according to claim 1, characterized in that, The positioning component includes a material platform mounting plate (3), which is located on the top of the base plate (1). A material platform (4) is provided at the top of the material platform mounting plate (3), and the material platform (4) is used to place the valve (18).

9. The valve device for an aluminum-plastic film upper part of a soft-pack lithium battery according to claim 8, characterized in that, The top of the material platform (4) is equipped with a rear positioning baffle (5), which is an "L" shaped structure.

10. The valve device for an aluminum-plastic film upper part of a soft-pack lithium battery according to claim 9, characterized in that, A side positioning block (6) is slidably disposed above the rear positioning stop (5).

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