Welding device for lithium battery

Abstract

The invention discloses a welding device for a lithium battery, and relates to the technical field of lithium battery welding processing devices. The device comprises a welding table provided with a welding mechanism, and a conveying mechanism is arranged on one side of the welding table; the welding mechanism is provided with a laser welding head which moves left and right in the horizontal direction and moves up and down in the vertical direction. A fixed clamping plate and a movable clamping plate are arranged on the two sides of the upper surface of the welding table under the welding mechanism correspondingly. A push plate moving in the length direction perpendicular to the movable clamping plate in the horizontal direction is further arranged on the upper surface of the welding table. The welding mechanism is arranged on the welding table, and the fixed clamping plate and the movable clamping plate which are used for clamping and positioning the lithium battery placed on the welding table are arranged, so that the lithium battery is welded after being clamped and positioned during use, the welding quality is improved, and meanwhile, the welding efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of lithium battery welding processing equipment, and in particular relates to a welding device for lithium batteries. Background Art

[0002] The welding technology of lithium batteries is extremely important in the production process of lithium batteries, and its quality directly affects the performance and life of lithium batteries. The welding technology of lithium batteries specifically includes the welding of wires / leads and the connection of electrode sheets. Among them, the electrode sheets are mostly welded using spot welding technology. Existing lithium battery welding operations mostly use semi-automatic spot welding machines, and the electrode sheets are welded by manually holding the welding head. This operation requires the position of the electrode sheet to be located first. Otherwise, it is easy for human errors to cause the electrode sheet to shift after welding, thereby causing product damage and affecting quality. Summary of the invention

[0003] The purpose of the present invention is to provide a welding device for lithium batteries. By arranging a welding mechanism on a welding table, and arranging a fixed clamp and a movable clamp for clamping and positioning the lithium battery placed on the welding table, the lithium battery is clamped and positioned before welding during use, thereby solving the problems raised by the existing background technology.

[0004] In order to solve the above technical problems, the present invention is achieved through the following technical solutions: The present invention is a welding device for lithium batteries, comprising a welding table provided with a welding mechanism, and a conveying mechanism provided at one side of the welding table; the welding mechanism has a laser welding head which can move left and right in the horizontal direction and up and down in the vertical direction; a fixed clamp and a movable clamp are respectively provided on both sides of the upper surface of the welding table directly below the welding mechanism; a push plate which can move in the horizontal direction perpendicular to the length direction of the movable clamp is also provided on the upper surface of the welding table; when in use, the lithium battery to be welded is placed on the upper surface of the welding table, and then the movable clamp is used to drive the lithium battery located between the movable clamp and the fixed clamp to approach each other; a rectangular block electrode sheet is placed on the top of the lithium battery, and then the welding mechanism is controlled to weld, and after the welding is completed, the push plate is used to drive the welded lithium battery group to move to the conveying mechanism.

[0005] Furthermore, an equipment installation cavity is provided inside the welding table; a rectangular hole A is provided on the welding table located in the moving path of the movable splint, and a slider A is provided at the bottom end of the movable splint, which passes through the rectangular hole A and slides along the length direction of the rectangular hole A. The slider A is connected to a connecting plate located in the equipment installation cavity, and one side of the connecting plate is connected to a telescopic push rod; the telescopic push rod is installed on the top side surface of the equipment installation cavity through a U-shaped mounting frame.

[0006] Furthermore, a rectangular hole B is provided on the welding table located in the moving path of the push plate, and a rectangular hole C is provided at the end of the rectangular hole B, so that the push plate can be completely stored in the rectangular hole C when in use; a slider B is provided at the bottom end of the push plate, which passes through the rectangular hole B and slides along the length direction of the rectangular hole B; a ball screw transmission mechanism arranged along the length direction of the rectangular hole B is connected to the top side surface of the equipment installation cavity on both sides of the rectangular hole B through a U-shaped connecting frame, and a telescopic cylinder that can be telescoped in the vertical direction is installed on the movable seat of the ball screw transmission mechanism, and a base plate is connected to the end of the telescopic cylinder, and the base plate is connected to the slider B; the rectangular hole C and the matching are T-shaped; guide grooves are provided on both side walls of the rectangular hole B along its length direction, and guide sliders that cooperate with the guide grooves are provided on both sides of the slider B.

[0007] Furthermore, an inspection opening is provided at the bottom of the equipment installation cavity, and an inspection cover is provided on the inspection opening.

[0008] Furthermore, the inspection cover plate is provided with a flange on the peripheral side thereof and is placed on the outer side of the welding platform; and the inspection cover plate is provided with a connection structure which is matched and connected with the welding platform.

[0009] Furthermore, the connection structure includes an operating rod rotatably mounted on the inspection cover, one end of the operating rod extends into the equipment installation cavity, and the end is connected to a block hooked on the bottom side of the equipment installation cavity, a groove is provided on the side of the block close to the bottom side of the equipment installation cavity, a movable column is connected to the groove through a spring, and a spherical structure is provided at the end of the movable column.

[0010] Furthermore, the welding mechanism includes a gantry fixed on the upper surface of the welding table, a linear module A is arranged on one side of the top of the gantry, a mounting plate is installed on the slider of the linear module A, a guide rail arranged in the vertical direction is installed on the mounting plate, and a driven slider is arranged on the guide rail; pulleys A and B are respectively arranged at two ends on one side of the guide rail, a transmission belt is arranged between the pulleys A and B, a connecting block is connected to the transmission belt, and a motor with an output shaft passing through the mounting plate and controlling the rotation of the pulley A is installed on the mounting plate; it also includes a movable base with one side connected to the connecting block and the driven slider, one side of the movable base is connected to the vertical plate, the bottom end of the vertical plate is connected to the horizontal plate, and laser welding heads are respectively installed on both ends of the horizontal plate; the vertical plate and the horizontal plate are matched to form a T shape.

[0011] Furthermore, the laser welding head includes a laser welding head body, at least two elastic telescopic rods are arranged around the laser welding head body, and positioning clamping rings are arranged at the ends of the elastic telescopic rods, and the light emitted by the laser welding head body passes through the positioning clamping rings.

[0012] The present invention has the following beneficial effects: The present invention provides a welding mechanism on a welding table, and provides a fixed clamp and a movable clamp for clamping and positioning a lithium battery placed on the welding table. In actual use, the lithium battery is clamped and positioned before welding, which not only improves the welding quality but also increases the welding efficiency.

[0013] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0015] Figure 1 It is a schematic diagram of the structure of the welding device of the present invention; Figure 2 for Figure 1 A partial enlarged view of the middle part; Figure 3 for Figure 1 A partial enlarged view of point C in the middle; Figure 4 for Figure 1 Main view; Figure 5 for Figure 4 Sectional view at the middle BB; Figure 6 for Figure 5 A partial enlarged view of point B in the middle; Figure 7 It is a schematic diagram of the connection structure of the present invention. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0018] See also Figure 1 , 4 -5, the present invention is a welding device for lithium batteries, including a welding table 1 supported by supporting legs, the welding table 1 is provided with a welding mechanism 2 and a positioning component for clamping and fixing the lithium battery 100 placed on the welding table 1. When in use, the lithium battery 100 is placed on the welding table 1, the lithium battery 100 is clamped and positioned by the positioning component, and then an electrode sheet 200 is placed on the top of the lithium battery 100, and then the welding mechanism 2 is started to weld the electrode sheet 200.

[0019] Specifically, Figure 6 The welding mechanism 2 has two laser welding heads that can move left and right in the horizontal direction and up and down in the vertical direction; and the positioning assembly includes a fixed clamping plate 11 and a movable clamping plate 12 respectively arranged on both sides of the upper surface of the welding table 1 directly below the welding mechanism 2, and after the welding is completed, it is convenient to transport the welded lithium battery pack, and a conveying mechanism 3 is arranged on one side of the welding table 1; and the upper surface of the welding table 1 is also provided with a push plate 13 that moves in the horizontal direction perpendicular to the length direction of the movable clamping plate 12.

[0020] Based on the above arrangement, when in use, the lithium battery 100 to be welded is placed on the upper surface of the welding table 1, and then the movable clamp 12 is used to drive the lithium battery 100 located between the movable clamp 12 and the fixed clamp 11 to move closer to each other; a rectangular block-shaped electrode sheet 200 is placed on the top of the lithium battery 100, and then the welding mechanism 2 is controlled to weld. After the welding is completed, the push plate 13 is used to drive the welded lithium battery group to move to the conveying mechanism 3.

[0021] like Figure 6 In order to conveniently control the movable splint 12 to move toward or away from the fixed splint 11, thereby clamping the multiple lithium batteries 100 located between the fixed splint 11 and the movable splint 12 together, the present invention is provided with an equipment installation cavity 4 inside the welding table 1, and a rectangular hole A101 is opened on the welding table 1 located in the moving path of the movable splint 12, and a slider A121 is provided at the bottom end of the movable splint 12, which passes through the rectangular hole A101 and slides along the length direction of the rectangular hole A101. The slider A121 is connected to a connecting plate 19 located in the equipment installation cavity 4, and one side of the connecting plate 19 is connected to a telescopic push rod 18; the telescopic push rod 18 is installed on the top side surface of the equipment installation cavity 4 through a U-shaped mounting frame. When in use, the movable splint 12 is driven to move by controlling the telescopic movement of the telescopic push rod 18.

[0022] Similarly, in order to facilitate the control of the push plate 13 to move away from or close to the fixed clamping plate 11 during use, Figure 3 and 6In the present invention, a rectangular hole B102 is provided on the welding table 1 located in the moving path of the push plate 13, and a rectangular hole C104 is provided at the end of the rectangular hole B102. The push plate 13 can be completely stored in the rectangular hole C104 when in use; a slider B14 is provided at the bottom end of the push plate 13, which penetrates the rectangular hole B102 and slides along the length direction of the rectangular hole B102; a ball screw transmission mechanism 16 arranged along the length direction of the rectangular hole B102 is connected to the top side surface of the equipment installation cavity 4 located on both sides of the rectangular hole B102 through a U-shaped connecting frame 15, and a telescopic cylinder 17 that can be telescoped in the vertical direction is installed on the movable seat of the ball screw transmission mechanism 16, and a base plate 142 is connected to the end of the telescopic cylinder 17, and the base plate 142 is connected to the slider B14; the rectangular hole C104 and the matching are T-shaped; the rectangular Both side walls of the hole B102 are provided with guide grooves 103 along the length direction thereof, and both sides of the slider B14 are provided with guide sliders 141 cooperating with the guide grooves 103. Then, when in use, the transmission motor on the ball screw transmission mechanism 16 is controlled to rotate, thereby driving the movable seat to move along the length direction of the screw, thereby realizing the control of the push plate 13 to move toward the side away from or close to the fixed clamping plate 11; it can be known that after the push plate 13 is controlled to complete a unloading operation, it is necessary to control the re-introduction of multiple lithium batteries 100 under the welding mechanism 2. At this time, it is necessary to control the push plate 13 to move to the position of the rectangular hole C104, and at the same time control the telescopic cylinder 17 to contract and drive the control push plate 13 to be stored in the rectangular hole C104. At this time, it is convenient to control the lithium battery 100 to slide along the upper surface of the welding table 1.

[0023] In one possible embodiment, an inspection opening 104 is provided at the bottom of the equipment installation cavity 4, and an inspection cover 5 is provided on the inspection opening 104; and a flange 51 is provided on the peripheral side of the inspection cover 5 and is placed on the outer side of the welding table 1; and a connecting structure 52 is provided on the inspection cover 5 and is connected to the welding table 1.

[0024] In order to facilitate the installation and removal of the inspection cover 5, Figure 7 The connection structure 52 includes an operating rod 521 rotatably mounted on the inspection cover 5, one end of the operating rod 521 extends into the equipment installation cavity 4, and the end is connected to a block 522 hooked on the bottom side of the equipment installation cavity 4, a groove 523 is provided on the side of the block 522 close to the bottom side of the equipment installation cavity 4, a movable column 525 is connected in the groove 523 via a spring 524, and a spherical structure 526 is provided at the end of the movable column 525.

[0025] In a possible implementation, Figure 2The provided welding mechanism 2 includes a gantry 20 fixed on the upper surface of the welding table 1, a linear module A21 is arranged on one side of the top of the gantry 20, a mounting plate 22 is installed on the slider of the linear module A21, a guide rail 24 arranged in the vertical direction is installed on the mounting plate 22, and a driven slider is arranged on the guide rail 24; pulleys A231 and B232 are respectively arranged at both ends of one side of the guide rail 24, a transmission belt 233 is arranged between the pulleys A231 and B232, a connecting block is connected to the transmission belt 233, and an output shaft is installed on the mounting plate 22 to penetrate the mounting plate 22 , and controls the motor 23 for rotating the pulley A231; also includes a movable base 25 whose one side is connected to the connecting block and the driven slider, one side of the movable base 25 is connected to the vertical plate 26, the bottom end of the vertical plate 26 is connected to the horizontal plate 27, and laser welding heads are respectively installed at both ends of the horizontal plate 27; the vertical plate 26 and the horizontal plate 27 cooperate to form a T shape; the laser welding head includes a laser welding head body, at least two elastic telescopic rods 28 are arranged on the periphery of the laser welding head body, and a positioning clamping ring 29 is arranged at the end of the elastic telescopic rod 28, and the light emitted by the laser welding head body passes through the positioning clamping ring 29.

[0026] In the present invention, the conveying mechanism 3 can be a belt conveyor, a chain plate conveyor or other conveying mechanisms with a conveying plane.

[0027] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does 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.

[0028] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A welding device for lithium batteries, characterized in that: It comprises a welding table (1) provided with a welding mechanism (2), and a conveying mechanism (3) provided on one side of the welding table (1); The welding mechanism (2) comprises a laser welding head which can move left and right in the horizontal direction and can move up and down in the vertical direction; A fixed clamping plate (11) and a movable clamping plate (12) are respectively arranged on both sides of the upper surface of the welding platform (1) located directly below the welding mechanism (2); The upper surface of the welding table (1) is also provided with a push plate (13) which moves in the horizontal direction along the length direction of the vertical movable clamping plate (12); When in use, the lithium battery (100) to be welded is placed on the upper surface of the welding table (1), and then the movable clamping plate (12) is used to drive the lithium battery (100) located between the movable clamping plate (12) and the fixed clamping plate (11) to move closer to each other; a rectangular block electrode sheet (200) is placed on the top of the lithium battery (100), and then the welding mechanism (2) is controlled to weld. After the welding is completed, the push plate (13) is used to drive the welded lithium battery group to move to the conveying mechanism (3).

2. A welding device for lithium batteries according to claim 1, characterized in that: The welding table (1) is provided with a device installation cavity (4) inside; A rectangular hole A (101) is provided on the welding table (1) located in the moving path of the movable clamping plate (12); a slider A (121) is provided at the bottom end of the movable clamping plate (12) and passes through the rectangular hole A (101) and slides along the length direction of the rectangular hole A (101); the slider A (121) is connected to a connecting plate (19) located in the equipment installation cavity (4); one side of the connecting plate (19) is connected to the telescopic push rod (18); The telescopic push rod (18) is mounted on the top side of the equipment installation cavity (4) via a U-shaped mounting frame.

3. A welding device for lithium batteries according to claim 1, characterized in that: A rectangular hole B (102) is provided on the welding table (1) located in the moving path of the push plate (13), and a rectangular hole C (104) is provided at the end of the rectangular hole B (102). The push plate (13) can be completely stored in the rectangular hole C (104) when in use; The bottom end of the push plate (13) is provided with a slider B (14) penetrating the rectangular hole B (102) and sliding along the length direction of the rectangular hole B (102); The top side surfaces of the equipment installation cavity (4) located on both sides of the rectangular hole B (102) are connected to a ball screw transmission mechanism (16) arranged along the length direction of the rectangular hole B (102) via a U-shaped connection frame (15); a telescopic cylinder (17) that can be telescoped in a vertical direction is installed on a movable seat of the ball screw transmission mechanism (16); the end of the telescopic cylinder (17) is connected to a base plate (142); and the base plate (142) is connected to the slider B (14); The rectangular hole C (104) and the fitting are in a T-shape; Both side walls of the rectangular hole B (102) are provided with guide slots (103) along the length direction thereof, and both sides of the slider B (14) are provided with guide sliders (141) that cooperate with the guide slots (103).

4. A welding device for lithium batteries according to claim 2, characterized in that: An inspection opening (104) is provided at the bottom of the equipment installation cavity (4), and an inspection cover plate (5) is provided on the inspection opening (104).

5. A welding device for lithium batteries according to claim 4, characterized in that: The inspection cover plate (5) is provided with a flange (51) on the circumference thereof and rests on the outer side of the welding platform (1); The inspection cover plate (5) is provided with a connection structure (52) which cooperates with the welding platform (1).

6. A welding device for lithium batteries according to claim 5, characterized in that: The connection structure (52) comprises an operating rod (521) rotatably mounted on the inspection cover (5); one end of the operating rod (521) extends into the equipment installation cavity (4), and the end is connected to a clamping block (522) hooked on the bottom side of the equipment installation cavity (4); a groove (523) is provided on a side of the clamping block (522) close to the bottom side of the equipment installation cavity (4); a movable column (525) is connected to the groove (523) via a spring (524); and a spherical structure (526) is provided at the end of the movable column (525).

7. A welding device for lithium batteries according to claim 1, characterized in that: The welding mechanism (2) comprises a gantry (20) fixed on the upper surface of the welding table (1), a linear module A (21) is arranged on one side of the top of the gantry (20), a mounting plate (22) is installed on the slider of the linear module A (21), a guide rail (24) arranged in a vertical direction is installed on the mounting plate (22), and a driven slider is arranged on the guide rail (24); A pulley A (231) and a pulley B (232) are respectively arranged at two ends of one side of the guide rail (24); a transmission belt (233) is arranged between the pulley A (231) and the pulley B (232); a connecting block is connected to the transmission belt (233); and a motor (23) is installed on the mounting plate (22), the output shaft of which passes through the mounting plate (22) and controls the rotation of the pulley A (231); It also includes a movable base (25) whose one side is connected to the connecting block and the driven slider, one side of the movable base (25) is connected to the vertical plate (26), the bottom end of the vertical plate (26) is connected to the horizontal plate (27), and both ends of the horizontal plate (27) are respectively installed with laser welding heads; The vertical plate (26) and the horizontal plate (27) cooperate to form a T-shape.

8. A welding device for lithium batteries according to claim 7, characterized in that: The laser welding head comprises a laser welding head body, at least two elastic telescopic rods (28) are arranged around the laser welding head body, and positioning clamping rings (29) are arranged at the ends of the elastic telescopic rods (28), and light emitted by the laser welding head body passes through the positioning clamping rings (29).

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