Composite Welding Device and Welding Method

Abstract

The present invention provides a composite welding device and a welding method. The composite welding device includes: a composite laser, a battery clamping mechanism, and a detection component; the battery clamping mechanism is used for clamping and driving the battery to be welded to rotate; the composite laser is disposed opposite to the battery to be welded, and the composite laser is used for sealing and shaping the welding portion of the battery to be welded with the composite laser beam emitted by it. The welding portion is the joint where the edge of the current collector plate fits against the inner wall of the battery case; the detection component is disposed on one side of the composite laser and is used for detecting the welded portion after welding. The battery clamping mechanism adjusts the angle of the battery to be welded in real time according to the detection data; during the process of the battery clamping mechanism driving the battery to be welded to rotate, the welding melt can flow into the weld along the inclination angle direction of the welding portion to fill the weld of the welding portion. The composite welding device provided by the present invention not only ensures the welding quality, improves the welding efficiency, but also improves the welding aesthetics.

Description

Technical Field

[0001] The present invention relates to the technical field of battery manufacturing equipment, and in particular, to a composite welding device and a welding method. Background Art

[0002] With the wide application of batteries, higher requirements are put forward for the production and manufacturing efficiency of batteries. During the process of battery production, it is necessary to weld the battery. In the prior art, in the rotary welding of cylindrical batteries, mainly a 1060nm fiber laser is used for oscillating welding to seal the steel shell. This welding method has the following defects: First, small holes and thermal deformation are likely to occur in the weld seam; Second, the overall width of the molten pool becomes wider, the heat input becomes larger, and there will be a greater thermal impact on the inner wall of the battery; Third, the welding appearance is not smooth, and the weld seam is relatively prominent. In summary, the existing battery shell sealing welding device and welding method will result in low welding quality, low welding efficiency and poor aesthetics of the battery. Summary of the Invention

[0003] The present invention provides a composite welding device and a welding method to solve the problem of poor welding quality in the existing battery sealing welding.

[0004] In a first aspect, the present invention provides a composite welding device, including: a composite laser, a battery clamping mechanism and a detection component;

[0005] The battery clamping mechanism is used to clamp and drive the battery to be welded to rotate;

[0006] The composite laser is disposed opposite to the battery to be welded, and the composite laser is used to perform sealing welding and shaping on the welding part of the battery to be welded with the composite laser beam emitted by it. The welding part is the joint where the edge of the current collector plate is attached to the inner wall of the battery case;

[0007] The detection component is disposed on one side of the composite laser and is used to detect the welded part after welding. The battery clamping mechanism adjusts the angle of the battery to be welded in real time according to the detection data;

[0008] Wherein, during the process that the battery clamping mechanism drives the battery to be welded to rotate, the welding molten liquid can flow into the weld seam along the inclination angle direction of the welding part to fill the weld seam of the welding part.

[0009] According to the composite welding device provided by the present invention, the battery clamping mechanism includes a base, a control motion component and a clamping component;

[0010] The control motion component is rotatably disposed on the base, the clamping component is connected to the control motion component, and the composite laser is disposed on the side of the clamping component away from the base;

[0011] Among them, the clamping assembly is used to clamp the battery to be welded; the control movement assembly is used to drive the clamping assembly to move so as to drive the battery to be welded to rotate.

[0012] According to the composite welding device provided by the present invention, the control movement assembly includes: an arc track, a moving member and a first driving member;

[0013] The arc track is arranged on the base, the moving member is adapted to the arc track, the first driving member is connected to the moving member, and under the action of the first driving member, the moving member can drive the battery to be welded to move along the extension direction of the arc track through the clamping assembly;

[0014] Among them, the radian of the arc track is 90°, and the rotation angle of the moving member along the arc track is from 0 to 90°.

[0015] According to the composite welding device provided by the present invention, the clamping assembly includes: a base, a chuck and a clamping member;

[0016] The base is connected to the moving member, the chuck is rotatably arranged on the base, the clamping member is arranged at one end of the chuck away from the base, and the clamping member is used to clamp the battery to be welded.

[0017] According to the composite welding device provided by the present invention, the clamping assembly further includes a second driving member; the second driving member is connected to the chuck, and under the action of the second driving member, the chuck can drive the battery to be welded to rotate around the axis of the battery to be welded through the clamping member.

[0018] According to the composite welding device provided by the present invention, the composite welding device further includes an angle sensor and a controller;

[0019] The angle sensor is arranged on the base, and the angle sensor is used to sense the angle information of the battery to be welded;

[0020] The controller is electrically connected to the angle sensor, and the controller is used to control the operation of the first driving member and the second driving member according to the angle information of the battery to be welded, so as to adjust the rotation angle of the battery to be welded by the rotation of the moving member and the clamping assembly.

[0021] According to the composite welding device provided by the present invention, the composite welding device further includes a protective gas output member; the protective gas output member is connected to the welding head, and the protective gas output member is used to output protective gas to the weld of the battery to be welded.

[0022] Second aspect, the present invention further provides a welding method, based on the composite welding device described in the first aspect, including:

[0023] Clamp the battery to be welded on the battery clamping mechanism and adjust the inclination angle of the battery to be welded;

[0024] Use a composite laser beam to perform sealing welding and shaping on the welding part of the rotating battery to be welded;

[0025] Detect the welded part after welding and shaping, and the battery clamping mechanism adjusts the inclination angle of the battery to be welded in real time according to the detection data, so that the welding melt flows into the weld along the inclination angle direction of the welded part to fill the weld.

[0026] According to the welding method provided by the present invention, the detecting the welded part after welding and shaping specifically further includes: detecting the weld width of the welded part and the effect of the welding melt filling the weld;

[0027] The detection component collects image information of the end face of the battery to be welded. The welded part of the welded part has a first end close to the central axis of the battery to be welded and a second end far from the central axis of the battery to be welded; based on the image information, obtain a first distance value between the first end and the central axis and a second distance value between the second end and the central axis, and obtain a weld width value based on the difference between the first distance value and the second distance value.

[0028] According to the welding method provided by the present invention, while detecting the weld width of the welded part, it further includes: detecting the weld depth and welding quality of the welded part by a non-destructive testing method. If the welding quality of the welded part is not high, stop welding.

[0029] The composite welding device provided by the present invention is composed of a composite laser, a battery clamping mechanism, and a detection component. Among them, on the premise that the battery clamping mechanism clamps the battery to be welded, the composite laser is used to perform sealing welding and shaping on the joint where the edge of the current collector plate of the battery to be welded fits with the inner wall of the battery case. At the same time, the battery clamping mechanism can clamp and drive the battery to be welded to rotate according to actual needs, and obtain welds that meet the composite process requirements according to needs, so that the processing process parameters have more flexibility. Further, during the process of the battery clamping mechanism driving the battery to rotate, the detection component can detect the welded part after welding, and the battery clamping mechanism adjusts the angle of the battery to be welded in real time according to the detection data, enabling the battery clamping mechanism to adaptively adjust the angle of the battery to be welded, so that the penetration depth and width of the welded part are closer to the requirements of process production. Moreover, the welding molten liquid can flow into the weld along the inclined angle direction of the weld during the rotation process to fill the weld. Compared with the prior art, the composite welding device provided by the present invention can prevent the weld from generating fine holes and thermal deformation, can adjust the penetration depth and width of the weld to avoid causing a large thermal impact on the inner wall of the battery, and the welding appearance is smooth and the weld is more beautiful, that is, it not only guarantees the welding quality, improves the welding efficiency, but also improves the welding aesthetics.

[0030] Further, the welding method provided by the present invention, since it is implemented based on the above-mentioned composite welding device, therefore, it also has the same advantages as described above.

[0031] In addition to the technical problems solved by the present invention, the technical features of the technical solutions constituted, and the advantages brought by these technical features of the technical solutions described above, the other technical features of the present invention and the advantages brought by these technical features will be further described in conjunction with the accompanying drawings, or understood through the practice of the present invention. Description of the Drawings

[0032] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0033] Figure 1 It is a schematic structural diagram of the composite welding device provided by the embodiment of the present invention;

[0034] Figure 2 It is a partial enlarged schematic diagram of the welded part of the battery to be welded provided by the embodiment of the present invention;

[0035] Reference Signs:

[0036] 1: Composite laser; 2: Battery clamping mechanism; 21: Base; 22: Control motion component; 221: Arc track; 222: Moving part; 223: First driving part; 23: Clamping component; 231: Base; 232: Chuck; 233: Clamping part; 3: Battery to be welded. Detailed implementation manners

[0037] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings in the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without creative efforts shall fall within the protection scope of the present invention.

[0038] In the description of the present invention, it should be noted that the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0039] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" 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 internal communication of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0040] In the description of this specification, the descriptions with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0041] The embodiment of the present invention provides a composite welding device and its welding method to solve the problem of low battery welding efficiency in the prior art.

[0042] The following Figure 1 and Figure 2 describe the composite welding device and welding method provided by the embodiment of the present invention.

[0043] In a first aspect, as Figure 1 shown, the composite welding device provided by an embodiment of the present invention includes: a composite laser 1, a battery clamping mechanism 2, and a detection component.

[0044] The battery clamping mechanism 2 is used to clamp and drive the battery 3 to be welded to rotate.

[0045] The composite laser 1 is disposed opposite to the battery 3 to be welded. The composite laser 1 is used to perform sealing welding and shaping on the welding portion of the battery 3 to be welded with the composite laser beam emitted by it. The welding portion is the joint where the edge of the current collector plate fits against the inner wall of the battery case.

[0046] The detection component is disposed on one side of the composite laser 1 and is used to detect the welding portion after welding. The battery clamping mechanism 2 adjusts the angle of the battery 3 to be welded in real time according to the detection data.

[0047] Wherein, during the process of the battery clamping mechanism 2 driving the battery 3 to be welded to rotate, the welding melt can flow into the weld along the inclined angle direction of the welding portion to fill the weld of the welding portion.

[0048] Specifically, as Figure 1 shown, the composite welding device provided by an embodiment of the present invention is composed of four parts: a composite laser 1, a battery clamping mechanism 2, and a detection component. Among them, as Figure 2 shown, the composite laser 1 is used to output the composite laser beam to the welding position of the battery 3 to be welded, and perform sealing welding and shaping on the joint where the edge of the current collector plate of the battery 3 to be welded fits against the inner wall of the battery case. Among them, welding and shaping respectively correspond to the penetration depth and width of the weld at the welding position.

[0049] Among them, the composite laser 1 can be a composite of a semiconductor laser and a fiber laser. When the composite laser beam emitted by it needs to create the penetration depth and width of the weld, the 1060nm wavelength fiber laser is relied on to create the penetration depth, and the semiconductor wavelength laser is used for surface treatment. The two operations are synchronized to create a very wide welding position, making the molten pool present a nail shape, making the surface weld wider and the internal weld narrower, reducing welding pores and backside heat influence. In addition, compared with a single fiber laser, using the composite laser 1 for composite welding can effectively reduce the welding stress at the weld.

[0050] As Figure 1 shown, the battery clamping mechanism 2 is disposed opposite to the composite laser 1. The battery clamping mechanism 2 can clamp and drive the battery 3 to be welded to rotate according to actual needs. During the rotation process, the composite laser 1 is used to increase the penetration depth and width of the weld at the welding portion, that is, to obtain a weld that meets the composite process requirements according to needs, making the processing process parameters more flexible.

[0051] Furthermore, during the process of the battery clamping mechanism 2 driving the battery to rotate, the welding melt can flow into the weld seam along the inclination angle direction of the weld seam during rotation to fill the weld seam. Compared with the sealing welding process in the prior art, this setting method of the welding melt flowing into the weld seam in the present invention can make the appearance of the sealed part of the battery after welding smoother and flatter, and the appearance is more beautiful in silver-white color.

[0052] For example, driven by the battery clamping mechanism 2, the battery 3 to be welded is inclined at 45°, and the welding head of the composite laser 1 is inclined 30° from the vertical. At this time, the welding spot is enlarged and elongated, and most of the energy of the welding spot is concentrated on the negative current collector plate, and a small amount of energy melts the steel shell and the nickel-plated copper to form a good weld seam.

[0053] In addition, the detection component can detect the welding part of the battery 3 to be welded during the welding process, and rotate the battery clamping mechanism 2 according to the detection result, so that the battery clamping mechanism 2 can adaptively adjust the angle of the battery 3 to be welded, so that the penetration and width of the weld seam are closer to the requirements of the process production, and the welding melt can flow smoothly into the weld seam, thereby effectively reducing the possibility of scalding the diaphragm and damaging the battery core.

[0054] Compared with the prior art, the composite welding device provided by the embodiment of the present invention can prevent the weld seam from generating small holes and thermal deformation, can adjust the penetration and width of the weld seam to avoid a large thermal impact on the inner wall of the battery, and moreover, the welding appearance is smooth and the weld seam is more beautiful, that is, not only the welding quality is guaranteed, the welding efficiency is improved, but also the welding aesthetics is improved.

[0055] In an optional embodiment, the battery clamping mechanism 2 includes a base 21, a control motion assembly 22 and a clamping assembly 23.

[0056] The control motion assembly 22 is rotatably arranged on the base 21, the clamping assembly 23 is connected to the control motion assembly 22, and the welding head is arranged on the side of the clamping assembly 23 away from the base 21.

[0057] Among them, the clamping assembly 23 is used to clamp the battery 3 to be welded; the control motion assembly 22 is used to drive the clamping assembly 23 to move to drive the battery 3 to be welded to rotate.

[0058] Specifically, as Figure 1As shown, the battery clamping mechanism 3 is composed of a base 21, a control motion component 22 and a clamping component 23. The base 21 is located at the bottom of the device. The base 21 is of a U-shaped structure, forming an installation space for installing the control motion component 22. The control motion component 22 is rotatably installed in the installation space of the base 21. The clamping component 23 is installed on the side of the control motion component 22 facing the welding head. The clamping component 23 is used to clamp the battery 3 to be welded. The welding head is arranged corresponding to the clamping component 23. The welding head can exactly correspond to the welding part of the battery 3 to be welded clamped by the clamping component 23. During the process of the control motion component 22 driving the clamping component 23 to move, it drives the battery 3 to be welded to rotate, so as to create the penetration depth and width of the battery 3 to be welded, and also enable the welding molten liquid to flow into the weld seam to fill the weld seam.

[0059] In an alternative embodiment, the control motion component 22 includes: an arc track 221, a moving part 222 and a first driving part 223.

[0060] The arc track 221 is arranged on the base 21. The moving part 222 is adapted to the arc track 221. The first driving part 223 is connected to the moving part 222. Under the action of the first driving part 223, the moving part 222 can drive the battery 3 to be welded to move along the extension direction of the arc track 221 through the clamping component 23.

[0061] Among them, the radian of the arc track 221 is 90°, and the rotation angle of the moving part 222 along the arc track 221 is from 0 to 90°.

[0062] Specifically, as Figure 1 shown, in order to facilitate the rotation of the moving part 222, arc tracks 221 are arranged on both sides of the base 21. The moving part 222 can swing along the arc track 221 under the drive of the first driving part 223 to change the inclination angle of the moving part 222 and the clamping component 23, and further change the inclination angle of the battery 3 to be welded.

[0063] Among them, the first driving part 223 can be a motor.

[0064] As Figure 1 shown, the radian of the arc track 221 is 90°. Under the constraint of the arc track 221, the rotation angle of the moving part 222 is from 0 to 90°, and the specific angle can be set correspondingly according to actual needs.

[0065] In an alternative embodiment, the clamping component 23 includes: a base 231, a chuck 232 and a clamping member 233.

[0066] The base 231 is connected to the moving part 222, the chuck 232 is rotatably arranged on the base 231, and the clamping part 233 is arranged at one end of the chuck 232 away from the base 231. The clamping part 233 is used to clamp the battery 3 to be welded.

[0067] Further, there are multiple clamping parts 233. The multiple clamping parts 233 are arranged at intervals along the circumferential direction of the chuck 232 and can move along the radial direction of the chuck 232.

[0068] Specifically, as Figure 1 shown, the base 231 is connected to the top of the moving part 222. The chuck 232 is rotatably connected to the base 231. The chuck 232 is also provided with the clamping part 233. The number of the clamping parts 233 is multiple. As Figure 1 shown, for example, the number of the clamping parts 233 is 3. The 3 clamping parts 233 are arranged along the circumferential direction of the chuck 232. In other embodiments, the clamping part 233 can also be set to other numbers. The specific number is not limited and can be set according to actual needs. The clamping part 233 can move along the radial direction of the chuck 232 to clamp and release the battery 3 to be welded.

[0069] The chuck 232 can rotate along the circumferential direction as needed to drive the battery 3 to be welded to rotate along the circumferential direction according to actual welding needs, so as to change the penetration depth and weld width, make the weld seam in the shape of a nail, and facilitate the welding melt to flow into the weld seam during the rotation process.

[0070] In an alternative embodiment, in order to further improve the automation degree of the circumferential rotation of the base 231, the clamping assembly 23 further includes a second driving part, and the second driving part can be a motor.

[0071] The second driving part is connected to the chuck 232. Under the action of the second driving part, the chuck 232 can drive the battery 3 to be welded to rotate around the axis of the battery 3 to be welded through the clamping part 233.

[0072] In an alternative embodiment, the composite welding device further includes an angle sensor and a controller.

[0073] The angle sensor is arranged on the base 21, and the angle sensor is used to sense the angle information of the battery 3 to be welded.

[0074] The controller is electrically connected to the angle sensor. The controller is used to control the operation of the first driving part 223 and the second driving part according to the welding detection effect of the battery 3 to be welded, so as to adjust the rotation angle of the battery 3 to be welded by the rotation of the moving part 222 and the clamping assembly 23.

[0075] Specifically, in order to better grasp the welding state in real time, an angle sensor and a controller are further provided in the composite welding device provided by the embodiment of the present invention. According to the detection result of the detection component on the welding situation, the angle sensor can sense the angle information of the battery 3 to be welded in real time; further, the controller controls the tilt angle of the moving member 222 and the rotation angle of the clamping component according to the angle information, so that the weld position meets the actual process requirements.

[0076] In an alternative embodiment, the composite welding device further includes a shielding gas output member; the shielding gas output member is connected to the welding head, and the shielding gas output member is used to output shielding gas to the weld of the battery 3 to be welded.

[0077] Specifically, during welding, the surface of the battery 3 to be welded can use the shielding gas output member to perform side blowing on the weld. The side blowing gas can be about 45° to the cylindrical surface. The rotation direction of the outer shell of the battery 3 to be welded is opposite to the gas flow direction. In this way, on the one hand, it can cool the weld to prevent thermal influence on the shell, and on the other hand, it can further prevent the welding melt from flowing out of the weld. The reverse gas flow can help the welding melt to flow into the weld completely.

[0078] In a second aspect, the embodiment of the present invention further provides a welding method, based on the composite welding device in the first aspect, including:

[0079] Clamp the battery 3 to be welded on the battery clamping mechanism 2 and adjust the tilt angle of the battery 3 to be welded.

[0080] Use a composite laser beam to perform sealing welding and shaping on the welding part of the rotating battery 3 to be welded.

[0081] Detect the welded part after welding and shaping. The battery clamping mechanism 2 adjusts the tilt angle of the battery 3 to be welded in real time according to the detection data, so that the welding melt flows into the weld along the tilt angle direction of the welded part to fill the weld.

[0082] Further, detecting the welded part after welding and shaping specifically further includes: detecting the weld width of the welded part and the effect of the welding melt filling the weld;

[0083] The detection component collects the image information of the end face of the battery 3 to be welded. The welded part of the welded part has a first end close to the central axis of the battery 3 to be welded and a second end far from the central axis of the battery to be welded; based on the image information, a first distance value between the first end and the central axis and a second distance value between the second end and the central axis are obtained, and the weld width value is obtained based on the difference between the first distance value and the second distance value.

[0084] While detecting the weld width of the welded part, it further includes: detecting the weld penetration and welding quality of the welded part by non-destructive testing. If the welding quality of the welded part is not high, stop welding.

[0085] In an alternative embodiment, the welding effect of the battery 3 to be welded can be judged by a vision detection device. As an alternative embodiment, the vision detection device may include a vision camera and an image processing system; the vision camera is arranged corresponding to the welding position, and the image processing system is electrically connected to the vision camera; the vision camera can acquire real-time images at the welding position, and the image processing system judges whether the current collector plate at the welding position is successfully welded to the inner wall surface of the housing, detects its fusion width, whether there is welding melt flowing out, etc. based on these real-time images. According to this information, the welding effect of the current collector plate and the housing can be judged. The inclination angle of the battery 3 to be welded is adjusted in real time according to the welding effect.

[0086] It can be understood that during the welding process, the acquisition end of the vision camera is arranged parallel and at intervals with the end face of the battery 3 to be welded, and the vision camera acquires the image information of the end face of the battery 3 to be welded in real time. The welded part formed at the welding position protrudes from the end face of the battery 3 to be welded. The welded part is defined as the area covered by the weld along the radial direction of the battery 3 to be welded. Along the radial direction of the battery 3 to be welded, the welded part has a first end close to the central axis of the battery 3 to be welded and a second end far from the central axis of the battery 3 to be welded. The image processing system extracts the features in the image information, calculates the first distance value between the first end of the welded part and the central axis of the battery 3 to be welded and the second distance value between the second end of the welded part and the central axis of the battery 3 to be welded. The fusion width value can be obtained from the difference between the first distance value and the second distance value, and this fusion width value is defined as the real-time fusion width value. The inclination angle of the battery 3 to be welded is defined as the angle of the central axis of the battery 3 to be welded relative to the horizontal plane. According to the comparison result between the real-time fusion width value and the preset fusion width value, the inclination angle of the battery 3 to be welded is adjusted in real time. For example, if the real-time fusion width value is less than the preset fusion width value, the angle of the central axis of the battery 3 to be welded relative to the horizontal plane is increased; if the real-time fusion width value is greater than the preset fusion width value, the angle of the central axis of the battery 3 to be welded relative to the horizontal plane is decreased.

[0087] Of course, only examples are given here. In actual operation, it can also be directly judged by human eye vision according to the photographed image, and non-destructive testing can also be used to detect the penetration depth and welding quality at the welding position. If the welding quality is not high, the welding process can be stopped immediately. The non-destructive testing methods here can be X-ray testing, ultrasonic testing, magnetic particle testing, etc. The specific non-destructive testing method is not limited and can be selected according to actual needs.

[0088] Since the above welding method is implemented based on the composite welding device, it also has the technical effects of the composite welding device, that is, the welding method provided by the embodiments of the present invention can prevent the weld from generating small holes and thermal deformation, can adjust the penetration and width of the weld to avoid causing a large thermal impact on the inner wall of the battery, and moreover, the welding appearance is smooth and the weld is more beautiful, that is, it not only ensures the welding quality, improves the welding efficiency, but also improves the welding aesthetics.

[0089] The device embodiments described above are only illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art can understand and implement it without creative efforts.

[0090] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or equivalently replace some of the technical features. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A composite welding device, characterized in that, it includes: a composite laser, a battery clamping mechanism and a detection component; the battery clamping mechanism is used for clamping and driving the battery to be welded to rotate; the composite laser is disposed opposite to the battery to be welded, and the composite laser is used for sealing and shaping the welding part of the battery to be welded with the composite laser beam emitted by it, and the welding part is the joint where the edge of the current collector plate fits with the inner wall of the battery case; the detection component is disposed on one side of the composite laser for detecting the welded part after welding, and the battery clamping mechanism adjusts the angle of the battery to be welded in real time according to the detection data; wherein, during the process that the battery clamping mechanism drives the battery to be welded to rotate, the welding melt can flow into the weld along the inclination angle direction of the welding part to fill the weld of the welding part.

2. The composite welding device according to claim 1, characterized in that, the battery clamping mechanism includes a base, a control motion component and a clamping component; the control motion component is rotatably disposed on the base, the clamping component is connected to the control motion component, and the composite laser is disposed on the side of the clamping component away from the base; wherein, the clamping component is used for clamping the battery to be welded; the control motion component is used for driving the clamping component to move so as to drive the battery to be welded to rotate.

3. The composite welding device according to claim 2, characterized in that, the control motion component includes: an arc track, a moving part and a first driving part; the arc track is disposed on the base, the moving part is adapted to the arc track, the first driving part is connected to the moving part, and under the action of the first driving part, the moving part can drive the battery to be welded to move along the extension direction of the arc track through the clamping component; wherein, the radian of the arc track is 90°, and the rotation angle of the moving part along the arc track is 0 to 90°.

4. The composite welding device according to claim 3, characterized in that, the clamping component includes: a base, a chuck and a clamping part; the base is connected to the moving part, the chuck is rotatably disposed on the base, the clamping part is disposed at one end of the chuck away from the base, and the clamping part is used for clamping the battery to be welded.

5. The composite welding device according to claim 4, characterized in that, the clamping component further includes a second driving part; the second driving part is connected to the chuck, and under the action of the second driving part, the chuck can drive the battery to be welded to rotate around the axis of the battery to be welded through the clamping part.

6. The composite welding device according to claim 5, characterized in that, the composite welding device further includes an angle sensor and a controller; the angle sensor is disposed on the base, and the angle sensor is used for sensing the angle information of the battery to be welded; The controller is electrically connected to the angle sensor, and the controller is configured to control the operation of the first driving member and the second driving member according to the welding detection effect of the battery to be welded, so as to adjust the rotation angle of the battery to be welded by the rotation of the moving member and the clamping assembly.

7. The composite welding device according to claim 1, wherein, the composite welding device further includes a protective gas output member; the protective gas output member is connected to the welding head, and the protective gas output member is configured to output protective gas to the weld of the battery to be welded.

8. A welding method, based on the composite welding device according to any one of claims 1 to 7, wherein, it includes: clamping the battery to be welded on the battery clamping mechanism and adjusting the inclination angle of the battery to be welded; performing sealing welding and shaping on the welding part of the rotating battery to be welded by a composite laser beam; detecting the welded part after welding and shaping, and the battery clamping mechanism adjusts the inclination angle of the battery to be welded in real time according to the detection data, so that the welding melt flows into the weld along the inclination angle direction of the welded part to fill the weld.

9. The welding method according to claim 8, wherein, the detecting the welded part after welding and shaping specifically further includes: detecting the weld width of the welded part and the effect of the welding melt filling the weld; the detecting assembly collects image information of the end face of the battery to be welded, and the welded part of the welded part has a first end close to the central axis of the battery to be welded and a second end far from the central axis of the battery to be welded; based on the image information, a first distance value between the first end and the central axis and a second distance value between the second end and the central axis are obtained, and a weld width value is obtained based on the difference between the first distance value and the second distance value.

10. The welding method according to claim 9, wherein, while detecting the weld width of the welded part, it further includes: detecting the weld depth and welding quality of the welded part by a non-destructive testing method, and if the welding quality of the welded part is not high, stop welding.

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