Bag opening mechanism of liquid injection machine

Abstract

The utility model discloses a liquid injection machine bag opening mechanism which comprises a bearing frame, a bearing plate is installed on the bearing frame through a lead screw module, a guide rod is arranged on the surface of the bearing plate in a penetrating mode, one end of the guide rod is in threaded connection with a limiting block, and a pressing plate is installed at the other end of the guide rod. And a spring is arranged between the pressing plate and the bearing plate and located on the outer side of the guide rod in a sleeving mode, an air suction cavity is formed in the pressing plate, a vacuum pump is installed on the bearing frame, an air suction pipe is installed at the air inlet end of the vacuum pump and communicates with the air suction cavity, and an air suction valve is installed on the air suction pipe. According to the bag opening mechanism, the guide rod, the limiting block and the spring are matched for use, so that the bag opening mechanism plays a role in buffering in the process of opening an opening of a battery cell air bag of a lithium battery and keeping the battery cell of the lithium battery in an opening state, and meanwhile, the stress is more uniform when a plurality of suction cups are in contact with the battery cell air bag of the lithium battery; the device is high in practicability and worthy of popularization.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery production equipment, in particular to a bag opening mechanism of a liquid filling machine. Background Art

[0002] Lithium batteries have become the preferred voltage device for consumer electronic products due to their high voltage, high energy density, high efficiency, environmental protection and long service life. The production scale of lithium batteries is constantly expanding, and their application areas are constantly expanding to electric vehicles, power tools, solar photovoltaic power generation systems, application lighting, portable mobile power supplies, mobile communication base stations and other fields. In the production process of lithium batteries, especially soft-pack lithium batteries, it is necessary to inject electrolyte into the battery cell. The existing electrolyte injection process mostly uses vacuum injection, which is used for the injection of electrolyte of lithium batteries including soft-pack lithium batteries. During the injection process, the air bag opening of the lithium battery cell needs to be opened and the lithium battery cell needs to be kept in an open state, and the electrolyte is injected into the lithium battery cell in an open state.

[0003] The existing technology has the following problems:

[0004] After extensive searching, it was found that Chinese Patent Publication No.: CN209626312U discloses a lithium battery vacuum liquid injection device, including a vacuum liquid injection mechanism and an air bag pulling mechanism; the air bag pulling mechanism is used to open or clamp the opening of the lithium battery cell air bag; the vacuum liquid injection mechanism is used to inject liquid into the lithium battery cell air bag whose opening is opened by the air bag pulling mechanism. The lithium battery vacuum liquid injection device of the utility model has a simple structure and is easy to operate; moreover, by respectively arranging diaphragm valves at the liquid injection inlet and the liquid injection outlet of the liquid injection cup, the liquid injection amount and the liquid injection speed can be accurately controlled by the pressure difference between the two diaphragm valves, thereby effectively improving the liquid injection effect; at the same time, by arranging a liquid receiving box between the vacuum liquid injection mechanism and the air bag pulling mechanism, the hanging liquid on the liquid injection needle can be recovered to improve the cleanliness of the working environment, and improve the liquid injection quality of the lithium battery cell electrolyte, thereby improving the production quality of the lithium battery.

[0005] However, there are still some problems that need to be improved in the actual use of the above patent. The most obvious one is that when the air bag pulling mechanism opens the lithium battery cell air bag, the suction cup is unevenly stressed, which affects the opening effect of the lithium battery cell air bag.

[0006] Therefore, we proposed a bag opening mechanism for a liquid filling machine to solve the above-mentioned drawbacks. Utility Model Content

[0007] The utility model aims to provide a bag opening mechanism for a liquid filling machine in order to solve the shortcomings in the prior art.

[0008] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: the bag opening mechanism of the liquid filling machine includes a carrying frame, a carrying plate is installed on the carrying frame through a screw module, and a guide rod is arranged through the surface of the carrying plate, and one end of the guide rod is threadedly connected to a limiting block, a pressure plate is installed on the other end of the guide rod, and a spring is sleeved on the outside of the guide rod between the pressure plate and the carrying plate, an air suction chamber is opened inside the pressure plate, a vacuum pump is installed on the carrying frame, and an air suction pipe is installed at the air inlet end of the vacuum pump, and the air suction pipe is connected with the air suction chamber, an air suction valve is installed on the air suction pipe, an exhaust pipe is connected to the exhaust chamber, and an exhaust valve is installed on the exhaust pipe, a first connecting pipe is installed on the surface of the pressure plate, and the first connecting pipe is connected with the air suction chamber, the other end of the first connecting pipe is connected to the second connecting pipe through a quick connector, and a suction cup is installed on the other end of the second connecting pipe.

[0009] Preferably, the second connecting pipe and the air extraction pipe are both made of telescopic hoses.

[0010] Preferably, a plurality of suction cups are provided, and the plurality of suction cups are distributed on the surface of the pressing plate in a rectangular array.

[0011] Preferably, both the air extraction valve and the air exhaust valve are solenoid valves.

[0012] Preferably, a control panel is installed on the support frame, and the control panel is electrically connected to the vacuum pump, the lead screw module, the air extraction valve and the exhaust valve through wires.

[0013] Preferably, two carrying plates are provided, and the movement directions of the two carrying plates are opposite.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. In the utility model, the guide rod, the limit block and the spring are used in coordination with each other, so that the bag opening mechanism plays a buffering role in opening the air bag of the lithium battery cell and keeping the lithium battery cell in an open state. At the same time, when a plurality of suction cups contact the air bag of the lithium battery cell, the force is more uniform, the utility model has strong practicality and is worthy of promotion.

[0016] 2. The utility model is provided with a quick connector, which facilitates the rapid disassembly and assembly of the suction cup, and is beneficial for the replacement and maintenance of the suction cup. It is highly practical and worthy of promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 This is a structural schematic diagram of the bag opening mechanism of the liquid filling machine proposed by the utility model;

[0019] Figure 2 for Figure 1 Schematic diagram of the local structure;

[0020] Figure 3 It is a stereoscopic diagram of the first connecting pipe, the quick connector, the second connecting pipe and the suction cup.

[0021] Legend:

[0022] 1. Carrying frame; 2. Screw module; 3. Carrying plate; 4. Vacuum pump; 5. Exhaust pipe; 6. Exhaust valve; 7. Pressing plate; 8. Exhaust chamber; 9. First connecting pipe; 10. Quick connector; 11. Second connecting pipe; 12. Suction cup; 13. Exhaust pipe; 14. Exhaust valve; 15. Guide rod; 16. Limit block; 17. Spring; 18. Control panel. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] In the description of the present utility model, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model; the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance; in addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a communication between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0025] Please refer to Figure 1-3 The bag opening mechanism of the liquid filling machine includes a carrier frame 1, a carrier plate 3 is installed on the carrier frame 1 through a screw module 2, and a guide rod 15 is arranged on the surface of the carrier plate 3, and one end of the guide rod 15 is threadedly connected to a limit block 16, a pressing plate 7 is installed on the other end of the guide rod 15, and a spring 17 is sleeved on the outer side of the guide rod 15 between the pressing plate 7 and the carrier plate 3, and an air extraction cavity 8 is opened inside the pressing plate 7, a vacuum pump 4 is installed on the carrier frame 1, and an air extraction pipe 5 is installed at the air inlet end of the vacuum pump 4, and the air extraction pipe 5 is connected with the air extraction cavity 8, an air extraction valve 6 is installed on the air extraction pipe 5, and the air extraction cavity 8 is connected with an exhaust pipe 13, and an exhaust valve 14 is installed on the exhaust pipe 13, a first connecting pipe 9 is installed on the surface of the pressing plate 7, and the first connecting pipe 9 is connected with the air extraction cavity 8, the other end of the first connecting pipe 9 is connected with the second connecting pipe 11 through a quick connector 10, and the other end of the second connecting pipe 11 is installed with a suction cup 12, When in use, refer to a lithium battery vacuum injection device disclosed in Chinese Patent Publication No.: CN209626312U, which utilizes two sets of lead screw modules 2 to drive the two supporting plates 3 to move in opposite directions, and ensure that the suction cup 12 is in contact with the battery cell air bag of the lithium battery, and then the vacuum pump 4 works to extract the air in the suction cup 12 to form a vacuum. At this time, the suction cup 12 can firmly hold the battery cell air bag of the lithium battery, and then the two sets of lead screw modules 2 drive the two supporting plates 3 to reset, and pull the battery cell air bag of the lithium battery open, so that the suction cup 12 plays a buffering role in opening the battery cell air bag of the lithium battery and keeping the battery cell of the lithium battery in an open state. At the same time, when several suction cups 12 are in contact with the battery cell air bag of the lithium battery, the force is more uniform, the practicability is strong, and it is worth promoting. Secondly, the setting of the quick connector 10 facilitates the rapid disassembly and assembly of the suction cup 12, which is conducive to the replacement and maintenance of the suction cup 12, and it is highly practical and worth promoting.

[0026] In this embodiment, the second connecting pipe 11 and the air extraction pipe 5 are both made of telescopic hoses.

[0027] Specifically, the opening effect of the air bag of the lithium battery cell is ensured.

[0028] In this embodiment, a plurality of suction cups 12 are provided, and the plurality of suction cups 12 are distributed on the surface of the pressing plate 7 in a rectangular array.

[0029] Specifically, the opening effect and efficiency of the lithium battery cell air bag are improved, and the stability is stronger.

[0030] In this embodiment, both the air extraction valve 6 and the exhaust valve 14 are electromagnetic valves.

[0031] Specifically, it can meet the requirements of vacuum bag opening and material discharge.

[0032] In this embodiment: a control panel 18 is installed on the support frame 1, and the control panel 18 is electrically connected to the vacuum pump 4, the lead screw module 2, the exhaust valve 6 and the exhaust valve 14 through wires.

[0033] Specifically, it is a common circuit connection structure, which will not be described in detail here.

[0034] In this embodiment, two carrying plates 3 are provided, and the movement directions of the two carrying plates 3 are opposite.

[0035] Specifically, two groups of bag opening mechanisms can be driven simultaneously to perform reverse movements to open the air bags of lithium battery cells.

[0036] In this embodiment: the controller is an existing structure, and the control circuit can be implemented by simple programming by technicians in this field. It belongs to the common knowledge in this field. It is only used without modification, so the control method and circuit connection are not described in detail.

[0037] Working principle: When in use, refer to a lithium battery vacuum injection device disclosed in Chinese Patent Publication No.: CN209626312U, which uses two sets of screw modules 2 to drive the two supporting plates 3 to move in opposite directions, and ensure that the suction cup 12 is in contact with the battery cell air bag of the lithium battery, and then the vacuum pump 4 works to extract the air in the suction cup 12 to form a vacuum. At this time, the suction cup 12 can firmly hold the battery cell air bag of the lithium battery, and then the two sets of screw modules 2 drive the two supporting plates 3 to reset, and pull the battery cell air bag of the lithium battery apart, so that the suction cup 12 plays a buffering role in opening the battery cell air bag of the lithium battery and keeping the lithium battery in an open state. At the same time, when several suction cups 12 are in contact with the battery cell air bag of the lithium battery, the force is more uniform, which is practical and worthy of promotion. Secondly, the setting of the quick connector 10 facilitates the rapid disassembly and assembly of the suction cup 12, which is conducive to the replacement and maintenance of the suction cup 12, and is practical and worthy of promotion.

[0038] It should be noted that the model specifications of the vacuum pump 4, the screw module 2, the exhaust valve 6 and the exhaust valve 14 need to be selected and determined according to the actual specifications of the device, and the specific selection calculation method adopts the existing technology in this field, so it will not be described in detail.

[0039] The power supply and principles of the vacuum pump 4, the screw module 2, the exhaust valve 6 and the exhaust valve 14 are clear to those skilled in the art and will not be described in detail here.

[0040] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A bag opening mechanism for a liquid filling machine, comprising a carrier frame (1), characterized in that: A bearing plate (3) is mounted on the bearing frame (1) via a lead screw module (2), and a guide rod (15) is provided on the surface of the bearing plate (3), and one end of the guide rod (15) is threadedly connected to a limit block (16), a pressing plate (7) is mounted on the other end of the guide rod (15), and a spring (17) is sleeved on the outer side of the guide rod (15) between the pressing plate (7) and the bearing plate (3), an air extraction chamber (8) is provided inside the pressing plate (7), a vacuum pump (4) is mounted on the bearing frame (1), and an air inlet end of the vacuum pump (4) is mounted with an air pump (8). An air pipe (5) is provided, and the air extraction pipe (5) is connected to an air extraction chamber (8); an air extraction valve (6) is installed on the air extraction pipe (5); an exhaust pipe (13) is connected to the air extraction chamber (8); an exhaust valve (14) is installed on the exhaust pipe (13); a first connecting pipe (9) is installed on the surface of the pressure plate (7); the first connecting pipe (9) is connected to the air extraction chamber (8); the other end of the first connecting pipe (9) is connected to a second connecting pipe (11) via a quick connector (10); and a suction cup (12) is installed on the other end of the second connecting pipe (11).

2. The bag opening mechanism of the liquid filling machine according to claim 1, characterized in that: The second connecting pipe (11) and the air extraction pipe (5) are both made of telescopic hoses.

3. The bag opening mechanism of the liquid filling machine according to claim 1, characterized in that: A plurality of suction cups (12) are provided, and the plurality of suction cups (12) are distributed in a rectangular array on the surface of the pressing plate (7).

4. The bag opening mechanism of the liquid filling machine according to claim 1, characterized in that: The air extraction valve (6) and the air exhaust valve (14) are both electromagnetic valves.

5. The bag opening mechanism of the liquid filling machine according to claim 1, characterized in that: A control panel (18) is installed on the carrier frame (1), and the control panel (18) is electrically connected to the vacuum pump (4), the lead screw module (2), the air extraction valve (6) and the exhaust valve (14) through wires.

6. The bag opening mechanism of the liquid filling machine according to claim 1, characterized in that: Two carrying plates (3) are provided, and the movement directions of the two carrying plates (3) are opposite.

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