Collector plate welding device based on red and blue light hybrid welding

Abstract

The utility model relates to the technical field of batteries, and provides a current collecting plate welding device based on red and blue light composite welding, which comprises a current collecting plate transferring assembly, a battery cell jacking assembly and a composite welding assembly which are arranged on a mounting frame, the collector plate transfer assembly comprises a first transfer part, the first transfer part is provided with a welding pressure plate, and a collector plate is adsorbed on the welding pressure plate; the battery cell jacking assembly comprises a clamping mechanism and a first driving mechanism, the first driving mechanism is connected with the clamping mechanism, and the first driving mechanism drives the clamping mechanism clamping the battery cell to move towards the direction of the welding pressure plate so that the battery cell can abut against the current collecting plate in a centering mode; the light emitting side of the composite welding assembly is arranged towards the welding pressure plate, so that the current collecting plate is welded at the end part of the battery cell. According to the embodiment of the utility model, the production efficiency of batteries can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery production, in particular to a current collecting plate welding device based on red and blue light composite welding. Background Art

[0002] With the popularity of electronic devices such as electric vehicles and smart phones, the demand for high-performance and high-safety full-tab batteries is growing. With its high energy density, long life and fast charging and discharging, full-tab batteries have become an important development direction in the field of new energy. In full-tab batteries, the collector plate is one of the key components, and its performance and quality directly affect the overall performance and safety of the battery.

[0003] The main function of the collector plate is to reliably connect the electrical properties of the battery cell to the positive or negative terminal of the battery to ensure that the current flows smoothly between the inside and outside of the battery. Therefore, the welding quality between the collector plate and the battery cell and terminal is very important. The existing collector plate welding device has poor stability and low welding accuracy, which affects production efficiency. Utility Model Content

[0004] The utility model provides a current collecting plate welding device based on red and blue light composite welding, which is used to solve the problems of poor stability and low welding precision of the current collecting plate welding device in the prior art, which affects the production efficiency.

[0005] The utility model provides a current collecting plate welding device based on red-blue light composite welding, comprising: a mounting frame; a current collecting plate transferring assembly, mounted on the mounting frame, the current collecting plate transferring assembly comprising a first transferring member, the first transferring member having a welding pressure plate, the welding pressure plate having the current collecting plate adsorbed thereon; a battery cell lifting assembly, mounted on the mounting frame, the battery cell lifting assembly comprising a clamping mechanism and a first driving mechanism, the first driving mechanism being connected to the clamping mechanism, the first driving mechanism driving the clamping mechanism holding the battery cell to move toward the direction of the welding pressure plate, so that the battery cell and the current collecting plate are aligned and abutted; a composite welding assembly, mounted on the mounting frame, the light emitting side of the composite welding assembly being arranged toward the welding pressure plate, so that the current collecting plate is welded to the end of the battery cell.

[0006] According to a current collecting plate welding device based on red-blue light composite welding provided by the utility model, the first transfer member includes: a turntable and a second driving mechanism, a plurality of welding pressure plates are arranged on the turntable, and the second driving mechanism is connected to the turntable.

[0007] According to a current collecting plate welding device based on red-blue light composite welding provided by the utility model, the current collecting plate transplanting assembly also includes: a second transfer member, the first end of the second transfer member is arranged close to the first transfer member and is located below the first transfer member; the second transfer member includes a moving plate, the top surface of the moving plate is provided with a positioning groove, and the current collecting plate is embedded in the positioning groove.

[0008] According to a current collecting plate welding device based on red-blue light composite welding provided by the utility model, the second transfer member also includes a third driving mechanism, and the third driving mechanism is connected to the moving plate to drive the moving plate to move along its own extension direction.

[0009] According to a current collecting plate welding device based on red-blue light composite welding provided by the utility model, the second transfer member also includes a lifting cylinder, which abuts against the movable plate, and the lifting cylinder drives the movable plate to move toward or away from the welding pressure plate.

[0010] According to a current collecting plate welding device based on red-blue light composite welding provided by the utility model, the second transfer member further includes a buffer member, and the buffer member is arranged on the lifting part of the lifting cylinder.

[0011] According to a current collecting plate welding device based on red-blue light composite welding provided by the utility model, the current collecting plate transplanting assembly also includes: a third transferring member, the third transferring member is arranged at the second end of the second transferring member, and is located above the second transferring member; the third transferring member includes a carrying plate and a fourth driving mechanism, the bottom of the carrying plate is provided with at least two adsorption parts, the adsorption part is provided with a limiting groove, and the current collecting plate is embedded in the limiting groove; the fourth driving mechanism is connected to the carrying plate, and the fourth driving mechanism drives the carrying plate to rotate around its own axis, and the limiting groove is placed directly above the positioning groove.

[0012] According to a current collecting plate welding device based on red-blue light composite welding provided by the utility model, the clamping mechanism includes a transmission member and two clamping plates, and the two clamping plates are respectively fixedly connected to one end of the transmission member; the first driving mechanism is connected to the other end of the transmission member.

[0013] According to a current collecting plate welding device based on red-blue light composite welding provided by the utility model, the first driving mechanism includes a lifting member, and the lifting member is arranged opposite to the transmission member; the transmission member includes a push rod and two hinged rods, the lifting member abuts against one end of the push rod, one end of the two hinged rods is respectively hinged to the other end of the push rod, the two clamping plates are respectively connected to the other ends of the two hinged rods, and a clamping space for clamping the battery cell is formed between the two clamping plates.

[0014] According to a collecting plate welding device based on red and blue light composite welding provided by the utility model, the composite welding assembly includes: a blue light laser protection component, an infrared laser protection component and an optical path composite protection component, the optical path composite protection component is arranged between the blue light laser protection component and the workpiece to be welded, and the optical path composite protection component is arranged between the infrared laser protection component and the workpiece to be welded; the light emitting side of the optical path composite protection component is arranged toward the welding pressure plate.

[0015] The current collecting plate welding device based on red-blue light composite welding provided by the utility model completes the positioning of the current collecting plate and the end of the battery cell by matching the current collecting plate transfer component and the battery cell lifting component, so that the end of the battery cell and the current collecting plate are aligned and abutted to form a state to be welded, with high precision and convenient for subsequent welding; further, the red-blue light composite welding component is used for welding, which has low cost, good welding effect and high efficiency, thereby improving the production efficiency of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a structural schematic diagram of a collector plate welding device based on red and blue light composite welding provided by the utility model;

[0018] Figure 2 It is a left view of the collector plate welding device based on red and blue light composite welding provided by the utility model;

[0019] Figure 3 It is a partial structural schematic diagram of a collector plate welding device based on red and blue light composite welding provided by the utility model;

[0020] Figure 4 It is a structural schematic diagram of the second transfer member provided by the utility model;

[0021] Figure 5 It is a partial structural schematic diagram of the clamping structure provided by the utility model;

[0022] Figure 6 It is a structural schematic diagram of the battery core lifting assembly provided by the utility model;

[0023] Figure 7 It is a schematic diagram of the composite welding assembly provided by the utility model;

[0024] Figure 8It is a schematic diagram of the process of the collector plate welding method based on red and blue light composite welding provided by the utility model;

[0025] Reference numerals:

[0026] 100. Mounting frame;

[0027] 200, current collecting plate transfer assembly; 210, first transfer member; 211, turntable; 212, second drive mechanism; 213, welding pressure plate; 220, second transfer member; 221, moving plate; 2211, positioning groove; 222, third drive mechanism; 223, lifting cylinder; 230, third transfer member; 231, bearing plate;

[0028] 300, battery cell lifting assembly; 310, clamping mechanism; 311, hinged rod; 312, ejector rod; 313, clamping plate; 314, roller; 315, tension spring;

[0029] 400, composite welding assembly; 410, collimated blue laser incident light; 420, collimated infrared laser incident light; 430, CCD camera; 440, blue laser protection component; 450, infrared laser protection component; 451, first birefringent prism; 452, magneto-optical material component with coil; 453, second birefringent prism; 461, laser transmission reflector; 462, infrared laser total reflector; 463, focusing lens;

[0030] 500. Loading device. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0033] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0035] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0036] The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are merely examples, and the purpose is not to limit the utility model. In addition, the utility model can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the applicability of other processes and / or the use of other materials.

[0037] Combine the following Figures 1 to 8 The utility model describes a current collecting plate welding device based on red and blue light composite welding.

[0038] The current collecting plate welding device based on red and blue light composite welding provided by the embodiment of the utility model includes: a mounting frame 100, a current collecting plate transfer assembly 200, a battery cell lifting assembly 300 and a composite welding assembly 400. The current collecting plate transfer assembly 200 is mounted on the mounting frame 100, and the current collecting plate transfer assembly 200 includes a first transfer member 210, and the first transfer member 210 has a welding pressure plate 213, and the welding pressure plate 213 adsorbs the current collecting plate. The battery cell lifting assembly 300 is mounted on the mounting frame 100, and the battery cell lifting assembly 300 includes a clamping mechanism 310 and a first driving mechanism, and the first driving mechanism is connected to the clamping mechanism 310, and the first driving mechanism drives the clamping mechanism 310 holding the battery cell to move toward the direction of the welding pressure plate 213, so that the battery cell and the current collecting plate are aligned and abutted. The composite welding assembly 400 is mounted on the mounting frame 100 , and the light-emitting side of the composite welding assembly 400 is arranged toward the welding pressure plate 213 , so that the collecting plate is welded to the end of the battery cell.

[0039] like Figure 1 and Figure 2 As shown, a welding station is provided on the mounting frame 100, and a welding pressure plate 213 is provided on the first transfer member 210, and the welding pressure plate 213 is used to adsorb the current collecting plate; the battery cell lifting assembly 300 is located below the welding station, and is used to drive the battery cell to move to the bottom of the welding pressure plate 213, abut against the current collecting plate, and weld the welding points between the battery cell and the current collecting plate through the composite welding assembly 400.

[0040] Specifically, the battery cell lifting assembly 300 includes a clamping mechanism 310 and a first driving mechanism. The clamping mechanism 310 is used to clamp the battery cell. The clamping mechanism 310 is connected to the driving end of the first driving mechanism. The first driving structure drives the clamping mechanism 310 to drive the battery cell to move in the direction toward the welding pressure plate 213 until the end of the battery cell is aligned and abutted against the collecting plate, thereby completing the docking of the collecting plate and the battery cell.

[0041] Furthermore, a composite welding assembly 400 is also installed on the mounting frame 100. The composite welding assembly 400 can combine blue light and infrared laser. The light emitting side of the composite welding assembly 400 is arranged toward the welding pressure plate 213. The composite welding assembly 400 can emit light toward the welding point of the collector plate and the battery cell, thereby achieving welding. Compared with the prior art that uses a single laser for welding, the embodiment of the utility model uses a red and blue light composite welding assembly 400 for welding, which is low in cost and high in welding efficiency.

[0042] The current collecting plate welding device based on red-blue light composite welding provided by the embodiment of the utility model completes the positioning of the current collecting plate and the end of the battery cell by matching the current collecting plate transfer assembly 200 and the battery cell lifting assembly 300, so that the end of the battery cell and the current collecting plate are aligned and abutted to form a state to be welded, with high precision and convenient for subsequent welding; further, the red-blue light composite welding assembly 400 is used for welding, which has low cost, good welding effect and high efficiency, thereby improving the production efficiency of the battery.

[0043] The first transfer assembly provided in the embodiment of the utility model comprises a turntable 211 and a second driving mechanism 212 . A plurality of welding pressure plates 213 are disposed on the turntable 211 . The second driving mechanism 212 is connected to the turntable 211 .

[0044] A plurality of welding pressure plates 213 are provided on the turntable 211, and the plurality of welding pressure plates are arranged at intervals along the circumference of the turntable 211. The second driving mechanism 212 is connected to the turntable 211, and is used to drive the turntable 211 to rotate around the axis of the turntable 211, so that the corresponding welding pressure plate 213 rotates to the welding station for welding. After welding is completed, the second driving mechanism 212 drives the turntable 211 to continue rotating, so that the next welding pressure plate 213 moves to the welding station for welding. This structure can perform welding sustainably and improve welding efficiency.

[0045] In one embodiment, Figure 3 As shown, four welding pressure plates 213 are provided on the turntable 211, each welding pressure plate 213 has two welding parts, and the second driving mechanism 212 drives the turntable 211 to rotate, so that one of the welding pressure plates 213 is placed in the welding station for welding. During the welding process, the other three welding pressure plates 213 can adsorb the collecting plate according to actual conditions, so that each welding pressure plate 213 has an adsorbed collecting plate, and welding can be performed when the corresponding welding pressure plate 213 is rotated to the welding station, thereby saving time and improving efficiency.

[0046] The collecting plate transfer assembly 200 provided in the embodiment of the utility model also includes: a second transfer member 220, the first end of the second transfer member 220 is arranged close to the first transfer member 210, and is located below the first transfer member 210; the second transfer member 220 includes a movable plate 221, and the top surface of the movable plate 221 is provided with a positioning groove 2211, and the current collecting plate is embedded in the positioning groove 2211, and the positioning groove 2211 is arranged along the extension direction of the movable plate 221.

[0047] Specifically, a positioning groove 2211 is provided on the top surface of the movable plate 221 for accommodating the current collecting plate, and the positioning groove 2211 can limit the position of the current collecting plate to achieve the positioning of the current collecting plate; further, the first end of the movable plate 221 is arranged close to the first transfer member 210 (turntable 211) and can be moved to the bottom of the turntable 211. When the welding pressure plate 213 rotates to the top of the movable plate 221, the welding pressure plate 213 adsorbs the current collecting plate in the positioning groove 2211 on the movable plate 221.

[0048] Furthermore, the second transfer member 220 also includes a third driving mechanism 222, which is connected to the movable plate 221, and drives the movable plate 221 to move along its own extension direction so that the positioning groove 2211 on the movable plate 221 is located directly below the turntable 211, so as to facilitate the welding pressure plate 213 to adsorb the collecting plate in the positioning groove 2211.

[0049] The second transfer member 220 in the embodiment of the present utility model further includes a lifting cylinder 223. Figure 4 As shown, when the moving plate 221 moves to the bottom of the welding plate 213, the lifting cylinder 223 moves in a direction perpendicular to the moving plate 221, toward or away from the moving plate 221. When abutting against the moving plate 221, the moving plate 221 is driven to move toward the welding plate 213, reducing the distance between the moving plate 221 and the welding plate 213, which helps the welding plate 213 to absorb and move the current collecting plate in the upper positioning groove 2211, saving time and improving efficiency.

[0050] The lifting part of the lifting cylinder 223 is provided with a buffer, such as a spring, to avoid contact between the cylinder and the moving plate 221 and avoid hard collision. Further, the bottom of the moving plate 221 is provided with an avoidance hole so that the buffer is in direct contact with the current collecting plate, and the lifting cylinder 223 directly drives the current collecting plate to move toward the direction close to the welding pressure plate 213.

[0051] The collecting plate transplanting and positioning assembly provided by the embodiment of the utility model also includes: a third transferring member 230, which is arranged at the second end of the second transferring member 220 and is located above the second transferring member 220; the third transferring member 230 includes a supporting plate 231 and a fourth driving mechanism, and at least two adsorption parts are provided at the bottom of the supporting plate 231, and the adsorption parts are provided with limiting grooves, and the collecting plate is embedded in the limiting grooves; the fourth driving mechanism is connected to the supporting plate 231, and the fourth driving mechanism drives the supporting plate 231 to rotate around its own axis, and the limiting groove is placed directly above the positioning groove 2211.

[0052] like Figure 1As shown, two adsorption parts are provided at the bottom of the carrier plate 231, and the two adsorption parts are arranged oppositely, one of the adsorption parts adsorbs the current collecting disk of the loading device 500, and the fourth driving mechanism drives the carrier plate 231 to rotate 180 degrees around its own axis, and the carrier plate 231 adsorbed with the current collecting disk rotates to the top of the second transfer member 220, that is, the adsorption part corresponds to the positioning groove 2211 on the movable plate 221, and the current collecting disk is placed in the positioning groove 2211; one end of the carrier plate 231 is used for loading, and the other end is used for unloading, which can effectively save time. In the embodiment of the utility model, the position of the adsorption part on the carrier plate 231 is not specifically limited, and the fourth driving mechanism can drive the carrier plate 231 to rotate according to actual conditions, so that the adsorption part corresponds to the positioning groove 2211 on the movable plate 221.

[0053] The third transfer member 230 and the first transfer member 210 in the embodiment of the utility model are respectively arranged at the two ends of the second transfer member 220, and are both located above the second transfer member 220. Specifically, an adsorption portion is provided at the bottom of the carrier plate 231, and the adsorption portion is provided with a limiting groove, which is used to carry the current collecting disc, limit the position of the current collecting disc, and realize primary positioning. The fourth driving mechanism drives the carrier plate 231 carrying the current collecting disc to rotate, and the limiting groove is placed just above the second end of the moving plate 221, and the limiting groove corresponds to the positioning groove 2211, and the current collecting disc on the carrier plate 231 is placed in the limiting groove of the moving plate 221, so as to realize secondary positioning of the current collecting disc. The third driving mechanism 222 is connected to the moving plate 221, driving the moving plate 221 to move along its own extension direction. The moving plate 221 is placed directly below the turntable 211, and the positioning groove 2211 corresponds to the welding plate 213; the lifting cylinder 223 drives the moving plate 221 and / or the current collecting plate to move toward the welding plate 213, reducing the distance between the current collecting plate and the welding plate 213, which helps the welding plate 213 to adsorb the current collecting plate. The second driving mechanism 212 drives the turntable 211 to rotate so that the welding plate 213 adsorbed with the current collecting plate rotates to the welding station. The first driving mechanism drives the clamping mechanism 310 holding the battery cell to move toward the welding plate 213 until the end of the battery cell is aligned with the current collecting plate, completing the movement of the current collecting plate and the battery cell, and using the composite welding assembly 400 to weld the current collecting plate and the battery cell to be welded. The collecting plate welding device based on red-blue light composite welding provided by the embodiment of the utility model moves the collecting plate to the welding station via the third transfer member 230, the second transfer member 220 and the first transfer member 210. After three movements and positioning, the collecting plate is placed at the welding station with high precision and good stability.

[0054] like Figure 5 and Figure 6As shown, the clamping mechanism 310 provided in the embodiment of the utility model includes a transmission member and two clamping plates 313, the two clamping plates 313 are respectively fixedly connected to one end of the transmission member; the first driving mechanism is connected to the other end of the transmission member. The embodiment of the utility model can drive the two clamping plates 313 to open and close through the first driving mechanism to firmly clamp the battery cell, with high positioning and clamping accuracy, which can meet higher process requirements.

[0055] The first driving mechanism includes a lifting member, which is arranged opposite to the transmission member; the transmission member includes a push rod 312 and two hinged rods 311, the lifting member abuts against one end of the push rod 312, one end of the two hinged rods 311 is respectively hinged to the other end of the push rod 312, two clamping plates 313 are respectively connected to the other ends of the two hinged rods 311, and a clamping space for clamping the battery cell is formed between the two clamping plates 313. The battery cell is installed in the clamping space, and the two sides of the battery cell are respectively abutted against the two clamping plates 313. The lifting member can be set as a cylinder with a vertical stroke, which is used to lift the push rod 312. The push rod 312 further drives the hinged rod 311 while moving. The hinged rod 311 contracts or opens to open or close the two clamping plates 313, so that the battery cell can be firmly clamped in the clamping space.

[0056] In an optional embodiment, the utility model adopts a "three-point positioning" method to clamp the battery cell, which can achieve a more ideal clamping effect and greatly improve the problem of unstable clamping and affecting production effect that is prevalent in the field. Specifically, on the basis of the above technical solution, a group of rollers 314 is provided on one clamping plate 313, and two groups of rollers 314 are provided on the other clamping plate 313. Through the three groups of rollers 314 at different positions installed on the clamping plate 313, the cylindrical battery cell is firmly positioned by point contact. It should be noted that each group of rollers 314 includes two rollers 314 arranged in sequence in the vertical direction, so that a good and stable clamping effect can be achieved for the cylindrical battery. Of course, each group can have one or more rollers 314, and the utility model does not limit this. It should also be noted that the rollers 314 are in rolling contact with the side walls of the battery cell, and their friction is smaller, so it is not easy to damage the battery cell during the clamping process, affecting the quality of the battery cell.

[0057] Furthermore, the opening and closing effect of the clamping plate 313 is crucial for the processing of the battery core. In order to obtain a stable and smooth opening and closing effect, the mutual coordination and connection between the structures are made more efficient and easy. The clamping mechanism 310 provided in the embodiment of the utility model also includes a mounting plate slidably connected to the mounting frame 100, and the clamping mechanism 310 is slidably connected to the mounting plate.

[0058] Specifically, the clamping mechanism 310 also includes a first slide rail and a second slide rail spaced apart on the mounting plate, the first slide rail extends in a first direction, two clamping plates 313 are respectively slidably connected to the first slide rail, the second slide rail extends in a second direction, the top rod 312 is slidably connected to the second slide rail, and the first direction is perpendicular to the second direction. In the technical solution provided in this embodiment, the first direction is a horizontal direction, the second direction is a vertical direction, the top rod 312 slides in a vertical direction through the second slide rail, and the two clamping plates 313 slide in a horizontal direction through the first slide rail. It should be noted that under the driving action of the lifting member, the top rod 312 moves in a vertical direction, and the two clamping plates 313 hinged thereto have a relatively close or relatively far movable stroke to clamp or release the battery cell. It should be noted that in actual application, in order to meet the needs of the battery cell process, the first direction and the second direction can also adopt directions other than the horizontal and vertical directions.

[0059] As before, for the clamping of the battery cell, the "three-point positioning" method can be used to improve the clamping accuracy, so that the side wall of the battery cell is in stable contact with the clamping plate 313. In addition, in order to achieve a good clamping effect, a moderate clamping force is also indispensable. Specifically, in the technical solution provided by the utility model, the clamping mechanism 310 also includes two tension springs 315, and the two ends of each tension spring 315 are respectively connected to each clamping plate 313, and the two tension springs 315 are arranged in parallel and are centrally symmetrically distributed. In this way, the two tension springs 315 are respectively connected to the clamping plates 313, so that the clamping plates 313 tightly clamp the battery cell in the initial state due to the elastic force of the tension springs 315, and the clamping plates 313 are driven to open through the driving action of the lifting member.

[0060] It should be noted that the clamping effect should be moderate, and too much is as bad as too little. In the production process, the clamping plate 313 often clamps the battery cell too tightly, causing damage to the battery cell. In view of this, the utility model adds a limiting mechanism, that is, a screw hole is provided on one clamping plate 313, and a limiting block is provided on one side of the other clamping plate 313. The clamping mechanism 310 also includes a screw rod passing through the screw hole. When each clamping plate 313 clamps the battery cell, the screw rod abuts against the limiting block, so that the movable stroke of the clamping plate 313 is fixed. In general, the screw rod can be adjusted to match the clamping distance between the two clamping plates 313 with the diameter of the battery cell, effectively avoiding the problem of damaging the battery cell. In addition, by adjusting the screw rod, the use requirements of battery cells of different sizes can also be met.

[0061] The composite welding assembly 400 provided in the embodiment of the utility model includes: a blue light laser protection component 440, an infrared laser protection component 450 and an optical path composite protection component. The optical path composite protection component is arranged between the blue light laser protection component 440 and the workpiece to be welded, and the optical path composite protection component is arranged between the infrared laser protection component 450 and the workpiece to be welded; the light emitting side of the optical path composite protection component is arranged toward the welding pressure plate 213.

[0062] like Figure 7 As shown, the collimated blue laser incident light 410 and the collimated infrared laser incident light 420 pass through the blue laser protection component 440 and the infrared laser protection component 450 respectively, and then the blue laser passes through the optical path composite protection component in turn and reaches the surface of the weld for composite to achieve welding.

[0063] The blue laser protection element 440 and the infrared laser protection element 450 both include a first birefringent prism 451, a second birefringent prism 453 and a magneto-optical rotatory material element 452 with a coil, wherein the magneto-optical rotatory material element 452 with a coil is located between the first birefringent prism 451 and the second birefringent prism 453. The first birefringent prism 451 includes an isosceles trapezoidal birefringent prism, a parallelogram birefringent prism and a right-angled triangle birefringent prism, wherein the parallelogram birefringent prism is located between the isosceles trapezoidal birefringent prism and the right-angled triangle birefringent prism. The second birefringent prism 453 includes two right-angled triangle birefringent prisms and a parallelogram birefringent prism, wherein the parallelogram birefringent prism is located between the two right-angled triangle birefringent prisms. In addition, one side of the isosceles trapezoidal birefringent prism and the right-angled triangle birefringent prism in the first birefringent prism 451 is coated with a reflective film, and the other side is coated with an anti-reflection film; both sides of the parallelogram birefringent prism are coated with an anti-reflection film. The second birefringent prism 453 has a unique anti-reflection film. The birefringent prism can be made of crystal material, and the refractive prisms of different sizes are bonded with gum.

[0064] For materials with high reflectivity such as copper, the laser incident on the copper surface will be reflected. The reflected light is also divided into two mutually perpendicular light beams by the second birefringent prism 453. After passing through the optically active material with a coil and the first birefringent prism 451, the two light beams can be returned along the original path separately and cannot be combined into one laser beam, thereby preventing the laser from being damaged.

[0065] The optical path composite includes: a laser transmission reflector 461, an infrared laser total reflector 462 and a focusing lens 463. The laser transmission reflector 461 is located between the blue laser protection component and the focusing lens 463, and the infrared laser total reflector 462 is located between the laser transmission reflector 461 and the infrared laser protection component 450. The laser transmission reflector 461 adopts a dichroic mirror, which can transmit blue light and reflect infrared laser.

[0066] Specifically, the collimated blue laser incident light 410 and the collimated infrared laser incident light 420 pass through the blue laser protection component 440 and the infrared laser protection component 450 respectively, and then the blue laser passes through the laser transmission reflector 461 and the focusing lens 463 in turn to reach the surface of the welding workpiece, and the infrared laser passes through the infrared laser total reflection mirror 462, the laser transmission reflector 461 and the focusing lens 463 in turn to reach the surface of the welding workpiece. The two lights pass through the focusing lens 463 to ensure that the focal positions are at the same height.

[0067] The composite welding assembly 400 of the embodiment of the utility model also includes a CCD camera 430, which includes a reflector, and the output end of the reflector is arranged toward the incident end of the blue light laser protection component 440, which is used to observe the morphology and welding trajectory of the welding point between the collecting plate and the battery cell, and the welding trajectory positioning can also be achieved through the CCD camera 430.

[0068] Based on the current collecting plate welding device based on red and blue light composite welding in any of the above embodiments, Figure 8 As shown, an embodiment of the utility model also provides a current collecting plate welding method based on red-blue light composite welding, including: step 100, controlling the current collecting plate transfer assembly carrying the current collecting plate to move to the target position; wherein the current collecting plate transfer assembly includes: a first transfer member, a second transfer member and a third transfer member, the first transfer member and the third transfer member are respectively at the two ends of the second transfer member, and are respectively located above the second transfer member.

[0069] Controlling the current collecting plate transfer assembly carrying the current collecting plate to move to a target position includes: controlling the third transfer member to rotate around the first axis, the third transfer member is placed directly above the second end of the second transfer member, so as to place the current collecting plate on the second transfer member; controlling the second transfer member to move along the second axis, the first end of the second transfer member is located directly below the first transfer member, so that the first transfer member adsorbs the current collecting plate on the second transfer member; the second axis is perpendicular to the first axis; controlling the third transfer member to rotate around the third axis, the welding pressure plate of the third transfer member is placed at the target position; the third axis is parallel to the first axis.

[0070] Step 200, control the cell lifting assembly holding the cell to move to the target position, and align the end of the cell with the collecting plate; step 300, control the composite welding assembly to perform composite welding toward the abutment between the cell and the collecting plate.

[0071] Specifically, the third transfer member is arranged near the loading device, and the third transfer member is used to carry the current collecting plate. The third transfer member is driven to rotate around the first axis, and one end carrying the current collecting plate is rotated to the top of the second transfer member, and corresponds to the second transfer member one by one. The third transfer member places the current collecting plate on the second transfer member; wherein the first axis is perpendicular to the vertical direction. The second transfer member is driven to move along the second axis, and the second axis is perpendicular to the first axis. The second axis moves to the bottom of the first transfer member, and corresponds to the welding pressure plate on the first transfer member one by one; at the same time, the second transfer member is driven to move in a direction perpendicular to the second axis (parallel to the first axis), and the second transfer member is driven to move in a direction close to the first transfer member, shortening the distance between the current collecting plate and the first transfer member, which helps the first transfer member to adsorb the current collecting plate, saving time, and improving efficiency.

[0072] Furthermore, the first transfer member is driven to rotate along a third axis, which is parallel to the first axis, so that the first transfer member is rotated to the welding station; at the same time, the battery cell lifting assembly holding the battery cell is driven to move toward the direction close to the current collecting plate until the end of the battery cell is aligned and abutted against the current collecting plate, and the composite welding assembly is controlled to perform composite welding toward the position to be welded where the battery cell and the current collecting plate abut.

[0073] The collector plate welding method based on red and blue light composite welding provided by the embodiment of the utility model has good stability and high welding precision, can effectively save transfer time and improve production efficiency.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A collector plate welding device based on red and blue light composite welding, characterized in that: include: Mounting frame; A current collecting plate transfer assembly is installed on the mounting frame, the current collecting plate transfer assembly comprises a first transfer member, the first transfer member has a welding pressure plate, and the welding pressure plate adsorbs the current collecting plate; A battery cell lifting assembly is installed on the mounting frame, the battery cell lifting assembly includes a clamping mechanism and a first driving mechanism, the first driving mechanism is connected to the clamping mechanism, and the first driving mechanism drives the clamping mechanism holding the battery cell to move toward the welding pressure plate, so that the battery cell is aligned with the current collecting plate; A composite welding assembly is mounted on a mounting frame, and a light-emitting side of the composite welding assembly is arranged toward the welding pressure plate, so that the collecting plate is welded to the end of the battery cell.

2. The collector plate welding device based on red and blue light composite welding according to claim 1 is characterized in that: The first transfer member includes: a turntable and a second driving mechanism, a plurality of welding pressure plates are arranged on the turntable, and the second driving mechanism is connected to the turntable.

3. The collector plate welding device based on red and blue light composite welding according to claim 2 is characterized in that: The collecting plate transplanting assembly further includes: a second transporting member, wherein a first end of the second transporting member is disposed close to the first transporting member and is located below the first transporting member; The second transfer member comprises a moving plate, a top surface of the moving plate is provided with a positioning groove, and the current collecting plate is embedded in the positioning groove.

4. The current collecting plate welding device based on red and blue light composite welding according to claim 3 is characterized in that: The second transfer member further includes a third driving mechanism, which is connected to the moving plate and drives the moving plate to move along its own extension direction.

5. The collector plate welding device based on red and blue light composite welding according to claim 3 is characterized in that: The second transfer member further includes a lifting cylinder, the lifting cylinder abuts against the movable plate, and the lifting cylinder drives the movable plate to move toward or away from the welding pressure plate.

6. The current collecting plate welding device based on red and blue light composite welding according to claim 5 is characterized in that: The second transfer member further includes a buffer member, and the buffer member is arranged on the lifting part of the lifting cylinder.

7. The collector plate welding device based on red and blue light composite welding according to claim 3 is characterized in that: The collecting plate transplanting assembly further includes: a third transporting member, the third transporting member being disposed at the second end of the second transporting member and being located above the second transporting member; The third transfer member comprises a carrying plate and a fourth driving mechanism, the bottom of the carrying plate is provided with at least two adsorption parts, the adsorption parts are provided with limiting grooves, and the current collecting plate is embedded in the limiting grooves; The fourth driving mechanism is connected to the carrying plate, and the fourth driving mechanism drives the carrying plate to rotate around its own axis. The limiting groove is placed directly above the positioning groove.

8. The current collecting plate welding device based on red and blue light composite welding according to claim 1 is characterized in that: The clamping mechanism comprises a transmission member and two clamping plates, wherein the two clamping plates are respectively fixedly connected to one end of the transmission member; and the first driving mechanism is connected to the other end of the transmission member.

9. The current collecting plate welding device based on red and blue light composite welding according to claim 8 is characterized in that: The first driving mechanism comprises a lifting member, and the lifting member is arranged opposite to the transmission member; The transmission member includes a push rod and two hinged rods. The lift member abuts against one end of the push rod. One end of the two hinged rods is respectively hinged to the other end of the push rod. The two clamping plates are respectively connected to the other ends of the two hinged rods. A clamping space for clamping the battery cell is formed between the two clamping plates.

10. The current collecting plate welding device based on red and blue light composite welding according to claim 1 is characterized in that: The composite welding assembly includes: a blue light laser protection component, an infrared laser protection component and an optical path composite protection component. The optical path composite protection component is arranged between the blue light laser protection component and the workpiece to be welded, and the optical path composite protection component is arranged between the infrared laser protection component and the workpiece to be welded; the light emitting side of the optical path composite protection component is arranged toward the welding pressure plate.

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