Ultrasonic welding negative pressure positioning device and battery production line

Abstract

This utility model discloses an ultrasonic welding negative pressure positioning device and a battery production line, belonging to the field of battery technology. It includes an ultrasonic welding circulating fixture with a through groove, a negative pressure adsorption module, a vacuum generator, and connecting pipes. The ultrasonic welding circulating fixture is used to place an adapter plate. The negative pressure adsorption module includes a support base and a suction nozzle assembly fixed to the support base. The support base is installed in the through groove, and the suction nozzle assembly includes multiple arrayed suction nozzles. The vacuum generator is connected to the suction nozzles through the connecting pipes. The contact surface of the suction nozzles near the adapter plate is made of an elastic material. When the vacuum generator is activated, it provides negative pressure adsorption force to the suction nozzles, which are used to apply negative pressure adsorption to the adapter plate. This utility model achieves the technical effect of improving positioning accuracy and thus improving welding quality.

Description

Technical Field

[0001] This utility model belongs to the field of battery technology, and specifically relates to an ultrasonic welding negative pressure positioning device and a battery production line. Background Technology

[0002] In the manufacturing process of lithium batteries, ultrasonic welding is a crucial step in connecting the tabs and adapter pieces. The welding quality directly affects the battery's conductivity and overall safety. In ultrasonic welding, the positioning accuracy of the adapter piece is the core factor determining the welding quality. In existing technologies, adapter piece positioning typically relies on mechanical clamping or manual adjustment. When a rigid fixture applies a normal clamping force to fix the adapter piece, stress concentration easily occurs at the contact interface. When the adapter piece overlaps the step of the fixture, localized contact between the clamping mechanism and the thin-walled adapter piece can easily lead to plastic deformation of the material. Furthermore, during ultrasonic welding, high-frequency vibration energy is transmitted to the clamping mechanism through the fixture, causing micro-amplitude resonance in the clamping components. This can easily cause the adapter piece to shift relative to the tab, resulting in low positioning accuracy.

[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 low positioning accuracy, which is not conducive to improving welding quality.

[0005] To solve the above-mentioned technical problems, this utility model provides an ultrasonic welding negative pressure positioning device. The ultrasonic welding negative pressure positioning device includes an ultrasonic welding circulation fixture with a through groove, a negative pressure adsorption module, a vacuum generator, and connecting pipes. The ultrasonic welding circulation fixture is used to place the adapter plate. The negative pressure adsorption module includes a support base and a suction nozzle assembly fixed to the support base. The support base is installed in the through groove, and the suction nozzle assembly includes multiple arrayed suction nozzles. The vacuum generator is connected to the suction nozzles through the connecting pipes. The contact end face of the suction nozzle near the adapter plate is made of an elastic material. When the vacuum generator is activated, it provides negative pressure adsorption force to the suction nozzle, and the suction nozzle is used to apply negative pressure adsorption to the adapter plate.

[0006] Optionally, the ultrasonic welding negative pressure positioning device further includes a vacuum monitoring module, which includes a pressure sensor and a signal processing unit connected to the pressure sensor. The pressure sensor is installed on the connecting pipe and is used to detect the negative pressure value in the connecting pipe in real time.

[0007] Optionally, the ultrasonic welding negative pressure positioning device further includes a vacuum leakage alarm module, which is electrically connected to the signal processing unit. When the signal processing unit detects that the negative pressure value is lower than a set threshold, it triggers an audible and visual alarm on the vacuum leakage alarm module.

[0008] Optionally, the ultrasonic welding negative pressure positioning device further includes a positioning failure interception module, which is connected to the vacuum leakage alarm module. After receiving the alarm signal, the positioning failure interception module is used to trigger production line shutdown or defective product interception.

[0009] Optionally, the distance between the contact end face of the suction nozzle and the adapter plate ranges from 0.1 mm to 0.3 mm.

[0010] Optionally, the ultrasonic welding cycle fixture includes a fixture body and a placement groove disposed on the fixture body for placing the adapter piece. The placement groove includes two symmetrically distributed stepped areas and a connecting area connecting the two stepped areas. Two through grooves are arranged side by side in each stepped area.

[0011] Optionally, each of the stepped areas is provided with two spaced-apart through slots, and the two through slots are arranged symmetrically with respect to the center line of the connecting area.

[0012] Optionally, the contact end face is located within the corresponding stepped area, and the contact end face is directly opposite the adapter piece.

[0013] Optionally, the elastic material includes flexible silicone.

[0014] According to another aspect of the present invention, the present invention also provides a battery production line, the battery production line including the ultrasonic welding negative pressure positioning device described above.

[0015] Beneficial effects:

[0016] This invention provides an ultrasonic welding negative pressure positioning device. An adapter plate is placed on an ultrasonic welding circulating fixture. A support base for the negative pressure adsorption module is installed within a through groove of the ultrasonic welding circulating fixture. A suction nozzle assembly is fixed to the support base and includes multiple arrayed suction nozzles. A vacuum generator is connected to the suction nozzles via connecting pipes. The contact surfaces between the suction nozzles and the adapter plate are made of an elastic material. When the vacuum generator is activated, it provides negative pressure adsorption force to the suction nozzles, which then apply negative pressure adsorption to the adapter plate. Thus, when the adapter plate is placed on the ultrasonic welding circulating fixture, when the vacuum generator is activated, the air path formed by the connecting pipes conducts a negative pressure adsorption force on the contact surfaces of the suction nozzles near the adapter plate, generating a uniform adsorption force field through the arrayed suction nozzles. Simultaneously, the elastic material contact surfaces can deform under pressure, allowing each suction nozzle to form a multi-point adaptive sealing contact with the adapter plate surface. At this point, the adapter plate is fixed to the ultrasonic welding cyclic fixture by a uniformly distributed negative pressure adsorption force. Furthermore, the deformation compensation function of the elastic material eliminates localized stress concentrations caused by traditional rigid contact. Through a dynamically balanced adsorption force distribution, more precise positioning and constraint of the adapter plate are achieved, providing stable spatial positioning for subsequent ultrasonic welding. This results in improved positioning accuracy and, consequently, improved welding quality. 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 structural schematic diagram of an ultrasonic welding negative pressure positioning device provided in an embodiment of the present invention.

[0019] Figure 2 This is a schematic diagram of the structure of an ultrasonic welding circulating fixture in an ultrasonic welding negative pressure positioning device provided for an embodiment of the present invention.

[0020] Figure 3 This is a schematic diagram of the vacuum generator and connecting pipeline in an ultrasonic welding negative pressure positioning device provided for an embodiment of this utility model.

[0021] Figure 4 This is a structural block diagram of a vacuum monitoring module in an ultrasonic welding negative pressure positioning device provided for an embodiment of the present invention.

[0022] Figure 5This is a structural block diagram of a vacuum leakage alarm module and a positioning failure interception module in an ultrasonic welding negative pressure positioning device provided for an embodiment of this utility model. Detailed Implementation

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] This utility model provides an ultrasonic welding negative pressure positioning device according to Embodiment 1. Please refer to [link to related documentation]. Figures 1 to 5 As shown, Figure 1 This is a schematic diagram of the structure of an ultrasonic welding negative pressure positioning device provided in an embodiment of this utility model. Figure 2 This is a schematic diagram of the structure of the ultrasonic welding circulating fixture 1 in an ultrasonic welding negative pressure positioning device provided in this embodiment of the utility model. Figure 3 This is a schematic diagram of the vacuum generator 3 and connecting pipe 31 in an ultrasonic welding negative pressure positioning device according to an embodiment of this utility model. Figure 4 This is a structural block diagram of the vacuum monitoring module 4 in an ultrasonic welding negative pressure positioning device provided in this embodiment of the utility model. Figure 5 This is a structural block diagram of the vacuum leakage alarm module 5 and the positioning failure interception module 6 in an ultrasonic welding negative pressure positioning device provided in this embodiment of the present invention. The ultrasonic welding negative pressure positioning device provided in this embodiment of the present invention includes an ultrasonic welding circulating fixture 1, a negative pressure adsorption module 2, a vacuum generator 3, and a connecting pipe 31. The ultrasonic welding circulating fixture 1 has a through groove 11 for placing an adapter plate. The negative pressure adsorption module 2 includes a support base 21 and a suction nozzle assembly 22. The suction nozzle assembly 22 is fixed on the support base 21, which is installed in the through groove 11. The suction nozzle assembly 22 includes multiple arrayed suction nozzles 221. The vacuum generator 3 is interconnected with the suction nozzles 221 through the connecting pipe 31. The contact end face of the suction nozzle 221 near the adapter plate is made of an elastic material. When the vacuum generator 3 is activated, it provides negative pressure adsorption force to the suction nozzles 221, which are used to apply negative pressure adsorption to the adapter plate.

[0029] The shape of the through groove 11 matches the shape of the negative pressure adsorption module 2, and the interior of the through groove 11 has space for placing the negative pressure adsorption module 2. In the negative pressure adsorption module 2, the support base 21 provides support and fixation for multiple arrayed nozzles 221. Each nozzle 221 can be provided with an independent air passage. An air distribution cavity can be integrated inside the support base 21. The air distribution cavity is connected to each nozzle 221 and is also connected to the connecting pipe 31.

[0030] In this embodiment, the adapter plate is placed on the ultrasonic welding circulating fixture 1. The support base 21 of the negative pressure adsorption module 2 is installed in the through groove 11 of the ultrasonic welding circulating fixture 1. The suction nozzle assembly 22 is fixed on the support base 21. The suction nozzle assembly 22 includes multiple arrayed suction nozzles 221. The vacuum generator 3 is interconnected with the suction nozzles 221 through the connecting pipe 31. The contact end face of the suction nozzle 221 that contacts the adapter plate is made of elastic material. When the vacuum generator 3 is activated, it provides negative pressure adsorption force to the suction nozzles 221, which are used to apply negative pressure adsorption to the adapter plate. Thus, when the adapter plate is placed on the ultrasonic welding circulating fixture 1, when the vacuum generator 3 is activated, the air path formed by the connecting pipe 31 conducts a negative pressure adsorption force on the contact end face of the suction nozzle 221 near the adapter plate, generating a uniform adsorption force field through the arrayed suction nozzles 221. Simultaneously, the contact surface of the elastic material can also undergo deformation compensation under pressure, allowing each suction nozzle 221 to form a multi-point adaptive sealing contact with the surface of the adapter plate. At this time, the adapter plate is fixed to the ultrasonic welding circulating fixture 1 under the action of a uniformly distributed negative pressure adsorption force. Furthermore, the deformation compensation function of the elastic material can eliminate the local stress concentration caused by traditional rigid contact. Through the dynamically balanced adsorption force distribution, more precise positioning constraints are achieved on the adapter plate, providing stable spatial positioning for subsequent ultrasonic welding. This achieves the technical effect of improving positioning accuracy and thus improving welding quality.

[0031] As one embodiment, the ultrasonic welding negative pressure positioning device provided in Embodiment 1 of this utility model further includes a vacuum monitoring module 4. The vacuum monitoring module 4 includes a pressure sensor 41 and a signal processing unit 42. The signal processing unit 42 is connected to the pressure sensor 41. The pressure sensor 41 is installed on the connecting pipe 31 and is used to detect the negative pressure value in the connecting pipe 31 in real time. Those skilled in the art will understand that the specific structure of the pressure sensor 41 and the signal processing unit 42 in the ultrasonic welding negative pressure positioning device provided in Embodiment 1 of this utility model is not limited. It is only necessary to realize that the pressure sensor 41 detects the negative pressure value in the connecting pipe 31 in real time, and the signal processing unit 42 compares the negative pressure value detected by the pressure sensor 41 with a set threshold. For example, the pressure sensor 41 can be a digital pressure sensor 41. The pressure sensor 41 is used to detect the negative pressure value in the connecting pipe 31 in real time. The pressure sensor 41 is connected to the signal processing unit 42 through a bus. The pressure sensor 41 detects the negative pressure value of the pipe at a certain sampling rate. The microcontroller of the signal processing unit 42 has a built-in preset algorithm. When the detected negative pressure value is within the normal working range, it is determined to be a normal adsorption state. Otherwise, it is determined to be an abnormal adsorption state. For example, when the detected negative pressure value is lower than the normal working range, it is determined to be a vacuum leakage state.

[0032] In some embodiments, the ultrasonic welding negative pressure positioning device provided in Embodiment 1 of this utility model further includes a vacuum leakage alarm module 5. The vacuum leakage alarm module 5 is electrically connected to the signal processing unit 42. When the signal processing unit 42 detects that the negative pressure value is lower than a set threshold, it triggers an audible and visual alarm on the vacuum leakage alarm module 5. Those skilled in the art will understand that the specific structure of the vacuum leakage alarm module 5 in the ultrasonic welding negative pressure positioning device provided in Embodiment 1 of this utility model is not limited. It is only necessary to ensure that when the vacuum monitoring module 4 determines that a vacuum leakage state has occurred, the vacuum leakage alarm module 5 will issue an audible and visual alarm, such as flashing the red warning light of the vacuum leakage alarm module 5 and emitting an alarm sound from the buzzer. By providing timely feedback on abnormal states of the adsorption system, it is possible to prevent imbalances in the adsorption force field caused by blockage of the local suction nozzle 221 or rupture of the pipeline.

[0033] In some embodiments, the ultrasonic welding negative pressure positioning device provided in Embodiment 1 of this utility model further includes a positioning failure interception module 6. The positioning failure interception module 6 is connected to the vacuum leakage alarm module 5. After receiving an alarm signal, the positioning failure interception module 6 is used to trigger production line shutdown or defective product interception. Those skilled in the art will understand that the specific structure of the failure interception module in the ultrasonic welding negative pressure positioning device provided in Embodiment 1 of this utility model is not limited. It is only necessary that when the vacuum leakage alarm module 5 issues an audible and visual alarm, the positioning failure interception module 6 can trigger production line shutdown or defective product interception. For example, the positioning failure interception module 6 may include a PLC controller. When the vacuum leakage alarm module 5 issues an audible and visual alarm, the positioning failure interception module 6 will send an emergency stop command to the production line conveyor to cut off the power supply. Alternatively, a pneumatic pusher located on the production line can be activated to move the current fixture into an isolation station, effectively preventing welding process abnormalities caused by adsorption failure.

[0034] In some embodiments, the distance between the contact end face of the suction nozzle 221 and the adapter plate ranges from 0.1 mm to 0.3 mm. The contact end face of the suction nozzle 221 refers to the side of the suction nozzle 221 that is close to the adapter plate. Assuming that the distance between the contact end face and the adapter plate is H, then 0.1 mm ≤ H ≤ 0.3 mm. This ensures that the elastic material generates effective deformation under negative pressure and avoids the attenuation of adsorption force caused by excessive distance.

[0035] In some embodiments, the ultrasonic welding cyclic fixture 1 includes a fixture body 12 and a placement groove 13. The placement groove 13 is disposed on the fixture body 12 and is used to place the adapter piece. The placement groove 13 includes symmetrically distributed connecting areas 132 and two stepped areas 131. The connecting areas 132 are interconnected with the two stepped areas 131. Two through grooves 11 are arranged side by side in each stepped area 131. The interior of the placement groove 13 has space for placing the adapter piece.

[0036] In some embodiments, each stepped area 131 has two spaced-apart through slots 11 inside, and the two through slots 11 are arranged symmetrically with respect to the center line of the connecting area 132, such as... Figure 2 As shown, the center line of the connecting area 132 refers to the center line from left to right at the center of the connecting area 132. The two through slots 11 are arranged symmetrically with respect to the center line of the connecting area 132, which can achieve a uniform adsorption force field and improve the stability of the welding process.

[0037] In some embodiments, the contact end face is located inside the corresponding step area 131, and the contact end face is directly opposite the adapter plate. The contact end face can also be spherical, so that the negative pressure action line of each suction nozzle 221 passes through the geometric center of the thickness direction of the adapter plate, which can eliminate the deflection torque caused by asymmetric adsorption and achieve a dynamic balance of adsorption force distribution.

[0038] In some implementations, the elastic material includes flexible silicone material, which can generate a certain elastic deformation under negative pressure, which is beneficial for forming a gradual contact seal during the adsorption process.

[0039] To provide a detailed description of the battery production line provided by this utility model, the above embodiment 1 provides a detailed description of an ultrasonic welding negative pressure positioning device. Based on the same utility model concept, this application also provides a battery production line, as detailed in embodiment 2.

[0040] Embodiment 2 of this utility model provides a battery production line, which includes the above-mentioned ultrasonic welding negative pressure positioning device.

[0041] This utility model provides a battery production line. An adapter plate is placed on an ultrasonic welding circulating fixture 1. A support 21 for a negative pressure adsorption module 2 is installed in a through groove 11 of the ultrasonic welding circulating fixture 1. A suction nozzle assembly 22 is fixed on the support 21 and includes multiple arrayed suction nozzles 221. A vacuum generator 3 is connected to the suction nozzles 221 via a connecting pipe 31. The contact surfaces of the suction nozzles 221 and the adapter plate are made of an elastic material. When the vacuum generator 3 is activated, it provides negative pressure adsorption force to the suction nozzles 221, which are used to apply negative pressure adsorption to the adapter plate. Thus, when the adapter plate is placed on the ultrasonic welding circulating fixture 1, and the vacuum generator 3 is activated, the air path formed by the connecting pipe 31 conducts a negative pressure adsorption force on the contact surfaces of the suction nozzles 221 near the adapter plate, generating a uniform adsorption force field through the arrayed suction nozzles 221. Simultaneously, the contact surface of the elastic material can also undergo deformation compensation under pressure, allowing each suction nozzle 221 to form a multi-point adaptive sealing contact with the surface of the adapter plate. At this time, the adapter plate is fixed to the ultrasonic welding circulating fixture 1 under the action of a uniformly distributed negative pressure adsorption force. Furthermore, the deformation compensation function of the elastic material can eliminate the local stress concentration caused by traditional rigid contact. Through the dynamically balanced adsorption force distribution, more precise positioning constraints are achieved on the adapter plate, providing stable spatial positioning for subsequent ultrasonic welding. This achieves the technical effect of improving positioning accuracy and thus improving welding quality.

[0042] 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. An ultrasonic welding negative pressure positioning device, characterized by, The ultrasonic welding negative pressure positioning device includes an ultrasonic welding circulating fixture with a through groove, a negative pressure adsorption module, a vacuum generator, and connecting pipes. The ultrasonic welding circulating fixture is used to place the adapter plate. The negative pressure adsorption module includes a support base and a suction nozzle assembly fixed to the support base. The support base is installed in the through groove, and the suction nozzle assembly includes multiple arrayed suction nozzles. The vacuum generator is connected to the suction nozzles through the connecting pipes. The contact end face of the suction nozzle near the adapter plate is made of an elastic material. When the vacuum generator is activated, it provides negative pressure adsorption force to the suction nozzle, which is used to apply negative pressure adsorption to the adapter plate.

2. The ultrasonic welding negative pressure positioning device of claim 1, wherein, The ultrasonic welding negative pressure positioning device also includes a vacuum monitoring module, which includes a pressure sensor and a signal processing unit connected to the pressure sensor. The pressure sensor is installed on the connecting pipe and is used to detect the negative pressure value in the connecting pipe in real time.

3. The ultrasonic welding negative pressure positioning device according to claim 2, characterized in that, The ultrasonic welding negative pressure positioning device also includes a vacuum leakage alarm module, which is electrically connected to the signal processing unit. When the signal processing unit detects that the negative pressure value is lower than a set threshold, it triggers an audible and visual alarm on the vacuum leakage alarm module.

4. The ultrasonic welding negative pressure positioning device according to claim 3, characterized in that, The ultrasonic welding negative pressure positioning device also includes a positioning failure interception module, which is connected to the vacuum leakage alarm module. After receiving the alarm signal, the positioning failure interception module is used to trigger production line shutdown or defective product interception.

5. The ultrasonic welding negative pressure positioning device according to claim 1, characterized in that, The distance between the contact end face of the suction nozzle and the adapter plate ranges from 0.1 mm to 0.3 mm.

6. The ultrasonic welding negative pressure positioning device according to claim 1, characterized in that, The ultrasonic welding cycle fixture includes a fixture body and a placement groove disposed on the fixture body for placing the adapter piece. The placement groove includes two symmetrically distributed stepped areas and a connecting area connecting the two stepped areas. Two through grooves are arranged side by side in each stepped area.

7. The ultrasonic welding negative pressure positioning device according to claim 6, characterized in that, Each of the stepped areas is provided with two through slots arranged at intervals, and the two through slots are arranged symmetrically with respect to the center line of the connecting area.

8. The ultrasonic welding negative pressure positioning device according to claim 6, characterized in that, The contact end face is located within the corresponding stepped area, and the contact end face is directly opposite the adapter piece.

9. The ultrasonic welding negative pressure positioning device according to claim 1, characterized in that, The elastic material includes flexible silicone.

10. A battery production line, characterized in that, The battery production line includes the ultrasonic welding negative pressure positioning device as described in any one of claims 1 to 9.

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