Diaphragm hot cutting device of lithium battery winding machine

Abstract

The utility model relates to a diaphragm hot cutting device of a lithium battery winding machine, which comprises a transverse moving mechanism and a moving plate, the transverse moving mechanism drives the moving plate to move back and forth, the moving plate is provided with a diaphragm pressing mechanism, a diaphragm hot melting mechanism and a diaphragm hot cutting mechanism, the diaphragm pressing mechanism is used for pressing a diaphragm, and the diaphragm hot melting mechanism is used for melting the diaphragm. When the diaphragm hot cutting device works, the diaphragm pressing mechanism firstly presses the diaphragm to prevent the diaphragm from moving, then the diaphragm hot cutting mechanism cuts off the diaphragm, the diaphragm hot melting mechanism heats and melts the cut-off diaphragm, and the diaphragm hot cutting mechanism cuts off the diaphragm to prevent the diaphragm from moving. And the molten diaphragm can be adhered to the core rod, so that the follow-up core rod battery core winding operation is ensured, the structural design is ingenious, and the working requirements are met.

Description

Technical Field

[0001] The utility model relates to the field of lithium batteries, and particularly to a diaphragm hot cutting device for a lithium battery winding machine. Background Art

[0002] At present, the diaphragm cutting methods of lithium battery winding machines on the market are usually divided into two types. One is hot cutting, and the other is cold cutting. The hot cutting method is to heat the resistance wire to a certain temperature, and then the mechanism drives the resistance wire forward to cut the diaphragm. The cold cutting method is that the mechanism directly drives a high-speed stainless steel cutter forward to cut the diaphragm (which is more common).

[0003] The above two cutting methods each have their own advantages and are applicable to traditional lithium battery winding. Also, due to the relatively small and easily deformed central holes of traditional battery cores, and usually not meeting the process requirements of the cores, maintaining the unchanged shape of the central hole of the core is important for the core. For example, the central hole of a cylindrical battery helps with exhaust, allowing the gas generated inside the battery to be discharged smoothly, thereby reducing the pressure inside the battery and preventing the battery from exploding violently. At the same time, this hole also promotes heat dissipation, better dissipating the heat generated when the battery is working. Another example is that by inserting a steel needle into the central hole of a cylindrical battery, the performance of the battery can be improved because the instability of the internal structure of the battery may lead to poor electrode contact, affecting the electrical conductivity and energy transmission efficiency of the battery.

[0004] Therefore, the applicant wants to develop a lithium battery winding machine. The main idea of this machine is to insert a mandrel into the central hole of the battery core to make it not easily deformed. Among them, in order to improve the overall automation degree of the equipment, it is also necessary to develop a cutting device suitable for the mandrel after cutting the diaphragm. Therefore, this solution came into being. Content of the Utility Model

[0005] The technical problem to be solved by the utility model is how to make a diaphragm hot cutting device in which the cut diaphragm can cooperate with the mandrel. The specific technical solution is as follows:

[0006] A diaphragm hot cutting device for a lithium battery winding machine, including a transverse movement mechanism and a moving plate. The transverse movement mechanism drives the moving plate to move back and forth. A diaphragm pressing mechanism, a diaphragm hot melting mechanism, and a diaphragm hot cutting mechanism are installed on the moving plate. The diaphragm pressing mechanism is used to press the diaphragm, the diaphragm hot cutting mechanism is used to cut the pressed diaphragm, and the diaphragm hot melting mechanism is used to heat and melt the cut diaphragm.

[0007] As a preferred embodiment of the present utility model, the diaphragm pressing mechanism includes a first seat body, a first connecting rod, a first roller seat, an upper diaphragm roller, a second seat body, a second connecting rod, a second roller seat, and a lower diaphragm roller. The first seat body is installed on the moving plate and is located in the upper part. The front of the first seat body is connected to the first connecting rod, and the front of the first connecting rod is connected to the first roller seat. The diaphragm roller is rotatably installed in the roller seat. The second seat body is installed on the moving plate and is located in the lower part. The front of the second seat body is connected to the second connecting rod, and the front of the second connecting rod is connected to the second roller seat. The lower diaphragm roller is rotatably installed in the second roller seat. The upper diaphragm roller is more forward than the lower diaphragm roller.

[0008] As a preferred embodiment of the present utility model, the diaphragm hot melting mechanism and the diaphragm hot cutting mechanism are located between the upper diaphragm roller and the lower diaphragm roller.

[0009] As a preferred embodiment of the present utility model, the diaphragm hot melting mechanism includes a hot melting cylinder, a hot melting moving block, a hot melting knife, and a guide rod. The hot melting cylinder is installed in the moving plate, and the hot melting cylinder drives the hot melting moving block to move back and forth. The hot melting knife is installed on the hot melting moving block, a heating rod is installed inside the hot melting knife, and a guide rod is installed behind the hot melting knife. The guide rod is slidably connected to the first seat body.

[0010] As a preferred embodiment of the present utility model, the diaphragm hot cutting mechanism includes a hot cutting cylinder, a hot cutting knife seat, and a hot cutting knife. The hot cutting cylinder drives the hot cutting knife seat to move back and forth. A heating rod is installed inside the hot cutting knife seat, and the hot cutting knife is installed in front of the hot cutting knife seat.

[0011] Beneficial effects: When the diaphragm hot cutting device of the present utility model is working, the diaphragm pressing mechanism first presses the diaphragm to prevent the diaphragm from shifting. Then, the diaphragm hot cutting mechanism cuts the diaphragm, and the diaphragm hot melting mechanism heats and melts the cut diaphragm. The melted diaphragm can be pasted onto the mandrel, thus ensuring the subsequent operation of winding the mandrel with the battery core. The structural design is ingenious and meets the working requirements. Description of the Drawings

[0012] Figure 1 is a perspective view of the present utility model;

[0013] Figure 2 is a perspective view of another angle of the present utility model;

[0014] Figure 3 is the front view of the present utility model;

[0015] Figure 4 is a schematic diagram of the working principle of the present utility model. Detailed Embodiments

[0016] The following further describes the detailed embodiments of the present utility model in conjunction with the drawings:

[0017] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the indicated position or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0018] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0019] As Figures 1 to 4 shown, a diaphragm hot cutting device of a lithium battery winding machine includes a transverse movement mechanism 1 and a moving plate 2. The transverse movement mechanism 1 drives the moving plate 2 to move back and forth. The transverse movement mechanism 1 is a servo motor cooperating with a lead screw nut transmission mechanism, which is a prior art. A diaphragm pressing mechanism, a diaphragm hot melting mechanism, and a diaphragm hot cutting mechanism are installed on the moving plate 2. The diaphragm pressing mechanism is used to press the diaphragm, the diaphragm hot cutting mechanism is used to cut the pressed diaphragm, and the diaphragm hot melting mechanism is used to heat and melt the cut diaphragm.

[0020] Specifically, the diaphragm pressing mechanism 3 includes a first seat body 31, a first connecting rod 32, a first roller seat 33, an upper diaphragm roller 34, a second seat body 35, a second connecting rod 36, a second roller seat 37, and a lower diaphragm roller 38. The first seat body 31 is installed on the moving plate 2 and is located at the upper part of the moving plate 2. The first connecting rod 32 is connected to the front of the first seat body 31, the first connecting rod 32 is connected to the front of the first roller seat 33, and the upper diaphragm roller 34 is rotatably installed in the first roller seat 33. The second seat body 35 is installed on the moving plate 1 and is located at the lower part of the moving plate 2. The second connecting rod 36 is connected to the front of the second seat body 31, the second connecting rod 36 is connected to the front of the second roller seat 37, and the lower diaphragm roller 38 is rotatably installed in the second roller seat 37. The upper diaphragm roller 34 is more forward than the lower diaphragm roller 38. When the transverse movement mechanism 1 drives the moving plate 2 to move forward, the upper diaphragm roller 34 presses the diaphragm at the winding needle, and the lower diaphragm roller 38 cooperates with the small roller to press the lower diaphragm. The diaphragm hot melting mechanism 4 and the diaphragm hot cutting mechanism 5 are between the upper diaphragm roller 34 and the lower diaphragm roller 38.

[0021] Specifically, the diaphragm hot melt mechanism includes a hot melt cylinder 41, a hot melt moving block 42, a hot melt knife 43, and a guide rod 44. The hot melt cylinder 41 is installed in the moving plate 2, and the hot melt cylinder 41 drives the hot melt moving block 42 to move forward and backward. The hot melt knife 43 is installed on the hot melt moving block 42, and a heating rod is installed inside the hot melt knife 43. A guide rod 44 is installed behind the hot melt knife 43. The guide rod 44 is slidably connected to the first seat body 31. The forward moving hot melt knife 43 will press the melted diaphragm onto the core rod, so that the diaphragm sticks to the core rod.

[0022] Specifically, the diaphragm hot cutting mechanism includes a hot cutting cylinder 51, a hot cutting knife seat 52 and a hot cutting knife 53. The hot cutting cylinder 51 drives the hot cutting knife seat 52 to move forward and backward. A heating rod is installed inside the hot cutting knife seat 52. The hot cutting knife 53 is installed in front of the hot cutting knife seat 52. The hot cutting cylinder 51 drives the hot cutting knife 53 to move forward to cut off the diaphragm. The upper diaphragm pressure roller 34, the hot melt knife 53, and the hot cutting knife 53 are distributed in sequence from top to bottom.

[0023] like Figure 4 As shown, the working principle of the utility model is as follows: first, the transverse movement mechanism 1 drives the movable plate 2 to move forward, and the movable plate 2 drives the first seat body 31 and the second seat body 35 to move forward, and the first seat body 31 and the second seat body 35 respectively drive the upper diaphragm pressing roller 34 and the lower diaphragm pressing roller 38 to move forward to press the upper and lower diaphragms, and then the hot cutting cylinder 51 drives the hot cutting knife 53 to move forward to cut off the diaphragm, and then the hot melting cylinder 41 drives the hot melting knife 43 to move forward, and the forward moving hot melting knife 43 will press the melted diaphragm onto the core rod, so that the diaphragm sticks to the core rod, and the upper diaphragm pressing roller 34 and the lower diaphragm pressing roller 38 move backward, and the battery cell begins to be wound and formed.

[0024] The above content is a further detailed description of the utility model in combination with specific preferred implementation methods. It cannot be determined that the specific implementation of the utility model is limited to these descriptions. For ordinary technicians in the technical field to which the utility model belongs, without departing from the concept of the utility model, they can also make several simple deductions or substitutions, which should be regarded as belonging to the protection scope of the utility model.

Claims

1. A diaphragm hot cutting device for a lithium battery winding machine, comprising a transverse movement mechanism and a movable plate, wherein the transverse movement mechanism drives the movable plate to move forward and backward, and is characterized in that: The movable plate is equipped with a diaphragm pressing mechanism, a diaphragm hot melting mechanism, and a diaphragm hot cutting mechanism. The diaphragm pressing mechanism is used to press the diaphragm, the diaphragm hot cutting mechanism is used to cut the pressed diaphragm, and the diaphragm hot melting mechanism is used to heat and melt the cut diaphragm.

2. The diaphragm hot cutting device of a lithium battery winding machine according to claim 1, characterized in that: The diaphragm pressing mechanism includes a first seat body, a first connecting rod, a first pressure roller seat, an upper diaphragm pressure roller, a second seat body, a second connecting rod, a second pressure roller seat, and a lower diaphragm pressure roller. The first seat body is installed on the movable plate and is located in the upper position. The front of the first seat body is connected to the first connecting rod, and the front of the first connecting rod is connected to the first pressure roller seat. The diaphragm pressure roller is rotatably installed in the pressure roller seat. The second seat body is installed on the movable plate and is located in the lower position. The front of the second seat body is connected to the second connecting rod, and the front of the second connecting rod is connected to the second pressure roller seat. The lower diaphragm pressure roller is rotatably installed in the second pressure roller seat, and the upper diaphragm pressure roller is closer to the front than the lower diaphragm pressure roller.

3. The diaphragm hot cutting device of a lithium battery winding machine according to claim 2, characterized in that: The diaphragm hot melting mechanism and the diaphragm hot cutting mechanism are between the upper diaphragm pressing roller and the lower diaphragm pressing roller.

4. A diaphragm hot cutting device for a lithium battery winding machine according to claim 2 or 3, characterized in that: The diaphragm hot melt mechanism includes a hot melt cylinder, a hot melt moving block, a hot melt knife, and a guide rod. The hot melt cylinder is installed in the moving plate, and the hot melt cylinder drives the hot melt moving block to move forward and backward. The hot melt knife is installed on the hot melt moving block, and a heating rod is installed inside the hot melt knife. A guide rod is installed behind the hot melt knife, and the guide rod is slidably connected to the first seat body.

5. A diaphragm hot cutting device for a lithium battery winding machine according to claim 2 or 3, characterized in that: The diaphragm hot cutting mechanism comprises a hot cutting cylinder, a hot cutting knife seat and a hot cutting knife. The hot cutting cylinder drives the hot cutting knife seat to move forward and backward. A heating rod is installed inside the hot cutting knife seat, and the hot cutting knife is installed in front of the hot cutting knife seat.

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