Hot melting welding device

Abstract

The utility model discloses a hot melting welding device, which belongs to the technical field of battery manufacturing, and comprises a hot pressing welding mechanism, a driver and a heating assembly, the hot pressing welding mechanism comprises a support frame, a heating return pipe connected with the support frame, and a hot pressing head with a limiting groove, the limiting groove is matched with a sealing nail, and the heating return pipe is connected with the heating assembly. An insulating layer is arranged on the hot pressing head, and the heating return pipe is located between the hot pressing head and the supporting frame. The driver is connected with the supporting frame and drives the supporting frame to drive the heating return pipe and the hot pressing head connected with the heating return pipe to move in a reciprocating mode in the direction close to the top cover; the heating assembly is connected with the heating return pipe, and the heating assembly is used for supplying heat to the heating return pipe and transferring the heat to the hot pressing head through the heating return pipe. According to the utility model, the technical effects of reducing the welding time and improving the welding yield are achieved.

Description

Technical Field

[0001] This utility model belongs to the field of battery manufacturing technology, and specifically relates to a hot melt welding device. Background Technology

[0002] Top cover sealing stud welding technology is widely used in battery manufacturing. The sealing stud welding system needs to adapt to various working environments and meet the application requirements of different scenarios. In the existing technology, laser welding trajectory scheme is usually adopted. The welding trajectory is adjusted by image to achieve precise welding operation. However, the laser welding process is complicated, time-consuming, and expensive. It is easy to cause unevenness on the welded surface and can also produce pinholes, increasing the scrap rate of the top cover.

[0003] Therefore, it is necessary to provide a new technical solution to solve the above-mentioned technical problems. Utility Model Content

[0004] The technical problem to be solved by this utility model is the problem of long time consumption and low yield.

[0005] To solve the above-mentioned technical problems, this utility model provides a hot melt welding device, which includes a hot press welding mechanism, a driver, and a heating component. The hot press welding mechanism includes a support frame, a heating return pipe connected to the support frame, and a hot press head with a limiting groove. The limiting groove matches a sealing nail. An insulating layer is provided on the hot press head. The heating return pipe is located between the hot press head and the support frame. The driver is connected to the support frame and drives the support frame to move the heating return pipe and the hot press head connected to the heating return pipe reciprocally towards the top cover. The heating component is connected to the heating return pipe and supplies heat to the heating return pipe and transfers heat to the hot press head through the heating return pipe.

[0006] Optionally, the support frame includes a fixing block and a support arm, the fixing block being connected to the driver; one end of the support arm being connected to the fixing block, and the other end of the support arm being connected to the heating return pipe.

[0007] Optionally, the hot press welding mechanism further includes a mesh radiator sleeved outside the heating return pipe, the mesh radiator being connected to the heating return pipe, and the heating return pipe transferring heat to the mesh radiator.

[0008] Optionally, the hot press welding mechanism further includes a temperature sensor and a PLC controller. The temperature sensor is disposed on the mesh heat sink. The PLC controller is connected to the temperature sensor and the heating component respectively, so as to collect the temperature information of the heating return pipe through the temperature sensor and transmit it to the PLC controller. The PLC controller controls the heating component to turn on or off.

[0009] Optionally, the heating assembly includes a resistance electric heater.

[0010] Optionally, the driver includes a motor and a push rod connected to the motor. The push rod is connected to the support frame so that the motor drives the push rod to move the support frame reciprocally toward the top cover.

[0011] Optionally, the hot press head includes a first end connected to the heating return pipe and a second end near the top cover. The second end includes a pressing surface and an opening disposed on the pressing surface, and the limiting groove extends from the opening in a direction near the first end.

[0012] Optionally, the second end tapers towards the top cover, the pressing surface is parallel to the top cover, and the top cover is made of metal.

[0013] Optionally, the heating return pipe is cylindrical, the limiting groove is cylindrical, the central axis of the heating return pipe is parallel to the central axis of the limiting groove, and the central axis of the limiting groove is parallel to the direction in which the driver drives the support frame to reciprocate.

[0014] Optionally, the sealing pin includes a top cap and a rod-shaped portion connected to the top cap, the rod-shaped portion being embedded in the limiting groove.

[0015] Beneficial effects:

[0016] This invention provides a thermomelting welding device. A heating return pipe of a thermocompression welding mechanism is connected to a support frame. The limiting groove of the thermocompression head matches the sealing pin. An insulating layer is provided on the thermocompression head. The heating return pipe is located between the thermocompression head and the support frame. A driver is connected to the support frame of the thermocompression welding mechanism. The driver drives the support frame to move the heating return pipe and the thermocompression head connected to the heating return pipe reciprocally towards the top cover. A heating component is connected to the heating return pipe and supplies heat to the heating return pipe, which in turn transfers heat to the thermocompression head. Thus, by supplying heat to the heating return pipe through the heating component and transferring heat to the thermocompression head, the support frame, driven by the driver, moves the heating return pipe and the thermocompression head towards the top cover. During this movement, heating and applying pressure to the sealing pin on the top cover causes plastic deformation of the top cover, simultaneously breaking the oxide layer at the welding interface of the top cover. This allows the sealing pin to be fixed to the top cover by thermocompression welding, reducing the time required for strong welding and improving the welding yield. This achieves the technical effect of reducing welding time and improving welding yield. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of a hot melt welding device provided for an embodiment of the present utility model.

[0019] Figure 2 This is a schematic diagram of the structure of a sealing nail in a hot melt welding device provided for an embodiment of the present utility model.

[0020] Figure 3 This is a schematic diagram of the sealing nail and top cover in a hot melt welding device provided for an embodiment of the present utility model.

[0021] Figure 4 This is a structural block diagram of a PLC controller, temperature sensor, driver, and heating component in a hot melt welding device provided for an embodiment of the present utility model. Detailed Implementation

[0022] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0023] To enable those skilled in the art to better understand the solutions of this application, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0024] In the embodiments of this application, "at least one" refers to one or more; "multiple" refers to two or more. In the description of this application, the terms "first," "second," "third," etc., are used only for the purpose of distinguishing descriptions and should not be construed as indicating or implying relative importance, nor should they be construed as indicating or implying order.

[0025] In this specification, references such as "one embodiment" or "some embodiments" mean that one or more embodiments of this application include the specific features, structures, or characteristics described in connection with that embodiment. Therefore, the terms "comprising," "including," "having," and variations thereof in this specification all mean "including but not limited to," unless otherwise specifically emphasized. It should be noted that in the embodiments of this application, "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone.

[0026] It should be noted that, in the embodiments of this utility model, when a component is referred to as being "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. When a component is considered to be "set on" another component, it can be directly set on the other component or there may be an intervening component. Furthermore, in the embodiments of this application, "connection" can also be understood as an electrical connection; the connection between two electrical components can be a direct or indirect connection between the two electrical components. For example, the connection between A and B can be a direct connection between A and B, or an indirect connection between A and B through one or more other electrical components. The terms "vertical," "horizontal," "left," "right," and similar expressions used in the embodiments of this utility model are for illustrative purposes only and are not intended to limit the utility model.

[0027] This utility model provides a hot melt welding device, please refer to [link to relevant documentation]. Figures 1 to 4 As shown, Figure 1 This is a schematic diagram of the structure of a hot melt welding device provided in an embodiment of the present invention. Figure 2This is a schematic diagram of the structure of a sealing nail in a thermomelting welding device provided in an embodiment of this utility model. Figure 3 This is a schematic diagram of the sealing nail and top cover in a hot melt welding device according to an embodiment of the present invention. Figure 4 This is a structural block diagram of a PLC controller, temperature sensor, driver, and heating component in a hot melt welding device according to an embodiment of the present invention. The hot melt welding device provided in this embodiment includes a hot press welding mechanism, a driver 2, and a heating component 3. The hot press welding mechanism includes a support frame 11, a heating return pipe 12, and a hot press head 13. The heating return pipe 12 is connected to the support frame 11. The hot press head 13 has a limiting groove 14, which matches a sealing pin 4. An insulating layer 15 is provided on the hot press head 13. The heating return pipe 12 is located between the hot press head 13 and the support frame 11. The driver 2 is connected to the support frame 11 and drives the support frame 11 to reciprocate the heating return pipe 12 and the hot press head 13 connected to the heating return pipe 12 towards the top cover 5. The heating component 3 is connected to the heating return pipe 12 and supplies heat to the heating return pipe 12, and transfers heat to the hot press head 13 through the heating return pipe 12.

[0028] The support frame 11 provides support for the heating return pipe 12 and the hot press head 13. The heating return pipe 12 is located between the hot press head 13 and the support frame 11, forming an effective heat transfer path. An insulating layer 15 on the hot press head 13 ensures operational safety and improves the durability of the equipment. During welding, the driver 2 drives the support frame 11 to reciprocate the heating return pipe 12 and the hot press head 13 connected to it towards the top cover 5. This reciprocating motion ensures welding uniformity and improves welding efficiency. The top cover 5 can be mounted on the aluminum shell 51.

[0029] During the movement, the hot press head 13 comes into close contact with the sealing pin 4 located on the top cover 5. Since the hot press head 13 has reached a suitable welding temperature and has a limiting groove 14 that matches the sealing pin 4, it can precisely heat and pressurize the sealing pin 4. The heating and pressurizing action causes plastic deformation of the top cover 5, simultaneously breaking down the oxide layer at the welding interface of the top cover 5, resulting in a strong bond between the sealing pin 4 and the top cover 5. This significantly reduces the time required for a strong weld and improves the weld yield.

[0030] In this embodiment, the heating return pipe 12 of the hot press welding mechanism is connected to the support frame 11. The limiting groove 14 of the hot press head 13 matches the sealing nail 4. An insulating layer 15 is provided on the hot press head 13, which wraps around the outer surface of the hot press head 13. The insulating layer 15 can be made of insulating material. The heating return pipe 12 is located between the hot press head 13 and the support frame 11. The driver 2 is connected to the support frame 11 of the hot press welding mechanism. The driver 2 drives the support frame 11 to move the heating return pipe 12 and the hot press head 13 connected to the heating return pipe 12 back and forth toward the top cover 5. The heating component 3 is connected to the heating return pipe 12. The heating component 3 is used to supply heat to the heating return pipe 12 and transfer heat to the hot press head 13 through the heating return pipe 12. Heat is supplied to the heating return pipe 12 via the heating component 3, which then transfers the heat to the hot press head 13. Driven by the driver 2, the support frame 11 moves the heating return pipe 12 and the hot press head 13 connected to it closer to the top cover 5. During this movement, the sealing pins 4 on the top cover 5 are heated and pressurized, causing plastic deformation of the top cover 5 and breaking the oxide layer at the welding interface. This allows the sealing pins 4 to be fixed to the top cover 5 by hot press welding, reducing the time required for a strong weld and improving the welding yield. This achieves the technical effect of reducing welding time and improving welding yield.

[0031] In one embodiment, the support frame 11 includes a fixed block 111 and a support arm 112. The fixed block 111 is connected to the driver 2, one end of the support arm 112 is connected to the fixed block 111, and the other end of the support arm 112 is connected to the heating return pipe 12. The fixed block 111 is directly connected to the driver 2 to ensure effective power transmission. One end of the support arm 112 is firmly connected to the fixed block 111, and the other end is connected to the heating return pipe 12, which can support the heating return pipe 12 and the hot press head 13 connected to it. Driven by the driver 2, the support frame 11 moves as a whole, causing the heating return pipe 12 and the hot press head 13 to reciprocate towards the top cover 5. Heat is supplied to the heating return pipe 12 through the heating component 3, and the heating return pipe 12 then transfers the heat to the hot press head 13, so that the hot press head 13 can effectively heat and pressurize the sealing nail 4 on the top cover 5 to achieve hot press welding.

[0032] In some embodiments, the thermoforming welding mechanism further includes a mesh radiator 16, which is sleeved outside the heating return pipe 12 and connected to it. The heating return pipe 12 transfers heat to the mesh radiator 16. Those skilled in the art will understand that the specific structure of the mesh radiator 16 in the thermoforming welding device provided in this embodiment is not limited. It is sufficient that the mesh radiator 16, when sleeved outside the heating return pipe 12 and tightly connected to it, effectively expands the heat dissipation area and improves safety during heating.

[0033] In some embodiments, the hot press welding mechanism further includes a temperature sensor 17 and a PLC controller 18. The temperature sensor 17 is mounted on the mesh heat sink 16. The PLC controller 18 is connected to both the temperature sensor 17 and the heating component 3. The temperature sensor 17 collects temperature information of the heating return pipe 12 and transmits it to the PLC controller 18. The PLC controller 18 controls the heating component 3 to turn on or off. For example, if the temperature sensor 17 collects a temperature value of A for the heating return pipe 12 and the preset maximum temperature threshold is B, when the PLC controller 18 receives A, it will compare A with B. If A ≥ B, the PLC controller 18 will control the heating component 3 to turn off, such as by opening the switch of the heating component 3. If A < B, the PLC controller 18 will control the heating component 3 to turn on, such as by closing the switch of the heating component 3. Temperature sensor 17 monitors the temperature of heating return pipe 12 in real time and transmits it to PLC controller 18. PLC controller 18 then controls the heating component 3 to turn on or off according to the preset steps, ensuring precise heat control during welding, avoiding overheating or overcooling, and improving welding accuracy and stability.

[0034] In some embodiments, the heating assembly 3 includes a resistance electric heater, which supplies heat to the heating return pipe 12, ensuring a stable heat supply and rapid response. This not only improves welding efficiency but also makes the welding process more stable and controllable. Alternatively, the heating assembly 3 may include a resistance wire connected to a solenoid valve control switch, which in turn is connected to a PLC controller 18. The resistance wire is connected to the heating return pipe 12, and the heat from the resistance wire is transferred to the heating return pipe 12. The PLC controller 18 can control the on / off state of the solenoid valve control switch, thus controlling whether the heating return pipe 12 heats up or not.

[0035] In some embodiments, the driver 2 includes a motor and a push rod. The push rod is connected to the motor and to the support frame 11. For example, a mounting hole 1111 is provided on the fixing block 111. After bolts pass through the mounting hole 1111 and the push rod, the fixing block 111 and the push rod are fixedly connected, so that the motor drives the push rod to move the support frame 11 reciprocally towards the top cover 5. The motor may include a stepper motor, in which case the push rod is the drive rod of the stepper motor, and the stepper motor can drive the drive rod to extend or retract. Alternatively, the motor may include a cylinder, in which case the push rod is the drive rod of the cylinder, and the cylinder can drive the drive rod to extend or retract. The push rod is directly connected to the support frame 11. Driven by the motor, the push rod can drive the support frame 11 and its heating return pipe 12 and hot pressure head 13 to move reciprocally, ensuring the precise positioning and rapid response of the hot pressure head 13 during the welding process, making the welding operation more flexible and efficient. The precise control of the driver 2 also makes the welding process more stable.

[0036] In some embodiments, the hot press head 13 includes a first end 131 and a second end 132. The first end 131 is connected to the heating return pipe 12, and the second end 132 is close to the top cover 5. The second end 132 includes a pressing surface 1321 and an opening 1322. The opening 1322 is disposed on the pressing surface 1321, and a limiting groove 14 extends from the opening 1322 in a direction close to the first end 131. The pressing surface 1321 of the second end 132 is flat and smooth, designed for close contact with the top cover 5 to ensure uniform heat and pressure transfer during the welding process. An opening 1322 is provided on the pressing surface 1321, and the limiting groove 14 extends from the opening 1322 in a direction close to the first end 131. The shape of the limiting groove 14 matches the sealing nail 4, enabling precise fixation and guidance of the sealing nail 4. This ensures that the sealing nail 4 is accurately placed on the top cover 5 during the welding process, which not only improves the welding accuracy but also helps to reduce welding time.

[0037] In some embodiments, the second end 132 tapers towards the top cover 5, and the pressing surface 1321 is parallel to the top cover 5, which is made of metal. The taper of the second end 132 towards the top cover 5 allows the hot press head 13 to insert more smoothly when it contacts the top cover 5, reducing friction and resistance. The parallelism between the pressing surface 1321 and the top cover 5 ensures uniform heating and pressurization during the welding process. The metal material used for the top cover 5 provides good thermal conductivity and plasticity, making the welding process more efficient and stable.

[0038] In some embodiments, the heating return pipe 12 is cylindrical, and the limiting groove 14 is cylindrical. The central axis of the heating return pipe 12 is parallel to the central axis of the limiting groove 14, and the central axis of the limiting groove 14 is parallel to the direction of reciprocating movement of the drive 2 driving the support frame 11. That is, the central axis of the limiting groove 14 extends in a direction parallel to the direction of reciprocating movement of the support frame 11. The cylindrical shape of the heating return pipe 12 allows heat to be evenly transferred along its length. The cylindrical shape of the limiting groove 14 matches the shape of the heating return pipe 12, ensuring stable heat transfer and precise control of the welding process. The parallelism between the central axis of the heating return pipe 12 and the central axis of the limiting groove 14 allows heat and pressure during the welding process to be evenly applied to the sealing nail 4 and the top cover 5 in the same direction. At the same time, the parallelism between the central axis of the limiting groove 14 and the direction of reciprocating movement of the drive 2 driving the support frame 11 ensures precise alignment and stable movement during the welding process, improving the accuracy and stability of the welding.

[0039] In some embodiments, the sealing nail 4 includes a top cap 41 and a rod-shaped portion 42, which is connected to the top cap 41 and embedded in the limiting groove 14. The rod-shaped portion 42 matches the limiting groove 14, allowing for precise insertion into the groove. This not only ensures the stability and accuracy of the sealing nail 4 during welding but also makes the welding process more controllable and efficient. During welding, the heat transferred by the heating return pipe 12 is evenly applied to the sealing nail 4 and the top cap 5 through the hot press head 13, causing the top cap 5 to undergo plastic deformation and simultaneously breaking down the oxide layer at the welding interface, thus achieving a strong weld between the sealing nail 4 and the top cap 5.

[0040] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A hot melt welding apparatus, characterized in that, The hot-melt welding device includes a hot-press welding mechanism, a driver, and a heating assembly. The hot-press welding mechanism includes a support frame, a heating return pipe connected to the support frame, and a hot press head with a limiting groove that matches a sealing pin. An insulating layer is provided on the hot press head, and the heating return pipe is located between the hot press head and the support frame. The driver is connected to the support frame and drives the support frame to move the heating return pipe and the hot press head connected to the heating return pipe reciprocally toward the top cover. The heating assembly is connected to the heating return pipe and supplies heat to the heating return pipe and transfers heat to the hot press head through the heating return pipe.

2. The hot melt welding apparatus according to claim 1, characterized in that, The support frame includes a fixed block and a support arm. The fixed block is connected to the driver. One end of the support arm is connected to the fixed block, and the other end of the support arm is connected to the heating return pipe.

3. The hot melt welding apparatus according to claim 1, characterized in that, The hot-press welding mechanism also includes A mesh radiator is fitted outside the heating return pipe, and the mesh radiator is connected to the heating return pipe, through which the heating return pipe transfers heat to the mesh radiator.

4. The hot melt welding apparatus according to claim 3, characterized in that, The hot press welding mechanism also includes a temperature sensor and a PLC controller. The temperature sensor is installed on the mesh heat sink. The PLC controller is connected to the temperature sensor and the heating component respectively, so as to collect the temperature information of the heating return pipe through the temperature sensor and send it to the PLC controller. The PLC controller controls the heating component to turn on or off.

5. The hot melt welding apparatus according to claim 3, characterized in that, The heating assembly includes a resistance electric heater.

6. The hot melt welding apparatus according to claim 1, characterized in that, The driver includes a motor and a push rod connected to the motor. The push rod is connected to the support frame so that the motor drives the push rod to move the support frame reciprocally toward the top cover.

7. The hot melt welding apparatus according to claim 1, characterized in that, The hot press head includes a first end connected to the heating return pipe and a second end near the top cover. The second end includes a pressing surface and an opening disposed on the pressing surface. The limiting groove extends from the opening in a direction close to the first end.

8. The hot melt welding apparatus according to claim 7, characterized in that, The second end tapers towards the top cover, and the pressing surface is parallel to the top cover, which is made of metal.

9. The hot melt welding apparatus according to claim 1, characterized in that, The heating return pipe is cylindrical, the limiting groove is cylindrical, the central axis of the heating return pipe is parallel to the central axis of the limiting groove, and the central axis of the limiting groove is parallel to the direction in which the driver drives the support frame to reciprocate.

10. The hot melt welding apparatus according to claim 1, characterized in that, The sealing pin includes a top cap and a rod-shaped portion connected to the top cap, the rod-shaped portion being embedded in the limiting groove.

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