Battery welding equipment

Abstract

The present invention discloses a battery welding device, comprising: a machine base, a welding fixture, a welding mechanism, and a rotation drive mechanism. The welding fixture is arranged on the machine base, and includes a clamping mechanism and a cover shell positioning structure. The clamping mechanism is provided with a workpiece clamping position, and the clamping mechanism is arranged on the machine base so as to rotate about a first axis, and the first axis is arranged in a left-right direction. The cover shell positioning structure is arranged on the machine base so as to rotate about the first axis, and the cover shell positioning structure is provided with a cover shell positioning hole along the first axis. The cover shell positioning structure is movably arranged on the machine base in the left-right direction so as to enable the workpiece clamping position to enter or exit the cover shell positioning hole. The cover shell positioning structure and the clamping mechanism can rotate synchronously, and the side wall of the cover shell positioning hole is provided with a pre-welding through hole. In the above-mentioned battery welding device, the battery pre-welding step and the full-circumference welding step are performed within a single welding fixture, thereby improving production efficiency and product consistency.

Description

Technical Field

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

[0002] The outer shell of existing cylindrical batteries includes a cylindrical shell and a cover. The cylindrical shell is provided with a receiving hole, and the cover is connected to the cylindrical shell and seals the receiving hole. When producing cylindrical batteries, the cylindrical shell and the cover need to be assembled together and then welded. The welding is divided into two steps: pre-welding and full-circumference welding. Existing battery welding equipment integrates pre-welding and full-circumference welding on a single device. Cylindrical batteries need to be pre-welded on a pre-welding tool to first position the cylindrical shell and the cover. The cylindrical battery is then disassembled and loaded into the full-circumference welding tool for full-circumference welding. The cylindrical battery needs to be transferred between the pre-welding and full-circumference welding steps, which affects production efficiency and product consistency. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a battery welding device in which the battery pre-welding step and the full-circumference welding step are performed in one welding tool.

[0004] According to an embodiment of the present invention, the battery welding equipment includes: a machine base, a welding fixture, a welding mechanism, and a rotation drive mechanism. The welding fixture is arranged on the machine base, and the welding fixture includes a clamping mechanism and a cover shell positioning structure. The clamping mechanism is provided with a workpiece clamping position, and the clamping mechanism is arranged on the machine base to rotate around a first axis, and the first axis is arranged in the left-right direction; the cover shell positioning structure is arranged on the machine base to rotate around the first axis, and the cover shell positioning structure is provided with a cover shell positioning hole along the first axis. The cover shell positioning structure is movably arranged on the machine base in the left-right direction so that the workpiece clamping position can enter or leave the cover shell positioning hole, the cover shell positioning structure and the clamping mechanism can rotate synchronously, and the side wall of the cover shell positioning hole is provided with a pre-welding through hole; the welding mechanism is arranged on the machine base, and the welding mechanism is provided with a welding head, and the welding head can be opposite to the workpiece clamping position; the rotation drive mechanism is arranged on the machine base and is used to drive the clamping mechanism to rotate.

[0005] According to the battery welding equipment of the embodiment of the present invention, there are at least the following beneficial effects: during the production of the equipment, the battery to be welded is placed in the workpiece clamping position of the clamping mechanism of the welding fixture, the clamping mechanism clamps the battery's column shell and cover body, and then the cover shell positioning structure of the welding fixture moves toward the battery until the end of the battery close to the cover body enters the cover shell positioning hole, and the hole side wall of the cover shell positioning hole is sleeved with the battery cover body and column shell located at the workpiece clamping position, thereby forming an aligned positioning, and then the rotation drive mechanism drives the clamping mechanism and the cover shell positioning structure to rotate synchronously, and the welding head of the welding mechanism pre-welds the connection between the cover body and the column shell through the pre-welding through hole. After the pre-welding is completed, the cover shell positioning structure moves away from the battery until the battery is separated from the cover shell positioning hole. At this time, the welding head can perform full-circumference welding on the connection between the battery cover body and the column shell; after the battery welding is completed, the clamping mechanism is released and the battery can be removed. In the above-mentioned battery welding equipment, the battery pre-welding step and the full-circumference welding step are performed in one welding fixture, thereby improving production efficiency and product consistency.

[0006] According to some embodiments of the present invention, the clamping mechanism includes a bottom top pressure shaft and a cover top pressure shaft, the welding tool is provided with an opening and closing drive assembly, the bottom top pressure shaft and the cover top pressure shaft are rotatably arranged on the machine base around the first axis, the bottom top pressure shaft and the cover top pressure shaft are opposite to each other on the left and right and form the workpiece clamping position, the cover top pressure shaft and / or the bottom top pressure shaft are movably arranged in the left and right directions relative to the machine base, the opening and closing drive assembly is provided on the machine base and can drive the bottom top pressure shaft and the cover top pressure shaft to approach and move away from each other.

[0007] According to some embodiments of the present invention, the pre-welding through holes are arranged radially along the first axis.

[0008] According to some embodiments of the present invention, at least two pre-welding through holes are provided and are evenly distributed around the first axis.

[0009] According to some embodiments of the present invention, the welding tooling further includes a bottom positioning structure, which is rotatably arranged on the machine base around the first axis, and the bottom positioning structure is provided with a bottom positioning hole along the first axis, and the bottom positioning hole is opposite to the cover shell positioning hole on the left and right and is respectively located on the left and right sides of the workpiece clamping position, and the bottom positioning structure can rotate synchronously with the clamping mechanism.

[0010] According to some embodiments of the present invention, the bottom positioning structure is movably arranged relative to the machine base along the left-right direction so that the workpiece clamping position can enter or leave the bottom positioning hole.

[0011] According to some embodiments of the present invention, the cover top pressure shaft is movably arranged relative to the machine base along the left and right directions, and the opening and closing drive assembly includes a first movable seat, a second movable seat, a first driver and a second driver. The first movable seat is movably arranged on the machine base along the left and right directions, the first driver is arranged on the machine base and is used to drive the first movable seat to move, the cover top pressure shaft is arranged on the machine base through the first movable seat, the second movable seat is movably arranged on the first movable seat along the left and right directions, the second driver is arranged on the first movable seat and is used to drive the second movable seat to move, and the cover shell positioning structure is arranged on the machine base through the second movable seat.

[0012] According to some embodiments of the present invention, the bottom and top pressure shafts are movably arranged relative to the machine base along the left and right directions, the opening and closing drive assembly includes a third moving seat, a fourth moving seat, a third driver and a fourth driver, the third moving seat is movably arranged on the machine base along the left and right directions, the third driver is arranged on the machine base and is used to drive the third moving seat to move, the bottom and top pressure shafts are arranged on the machine base through the third moving seat, the fourth moving seat is movably arranged on the third moving seat along the left and right directions, the fourth driver is arranged on the third moving seat and is used to drive the fourth moving seat to move, and the bottom positioning structure is arranged on the machine base through the fourth moving seat.

[0013] According to some embodiments of the present invention, the first movable seat includes a main body, an elastic member and a buffer seat, the cover top pressure shaft is rotatably connected to the buffer seat, the buffer seat is slidably arranged on the main body along the left and right directions, the main body is movably arranged on the machine base along the left and right directions, the elastic member is arranged between the buffer seat and the main body, and the two ends of the elastic member are respectively in contact with the buffer seat and the main body.

[0014] According to some embodiments of the present invention, the battery welding equipment further includes a welding control component, which is used to control the opening and closing of the welding head of the welding mechanism during pre-welding; the welding head is a laser welding head; the welding control component includes a turntable, a photoelectric switch and a controller, the turntable is arranged on the cover shell positioning structure and rotates synchronously with the cover shell positioning structure, the turntable is provided with a light-through hole, the photoelectric switch is arranged on the machine base, the photoelectric switch has a light-emitting part and a light-sensitive part, the light-emitting part and the light-sensitive part are respectively located on opposite sides of the turntable and are arranged toward the turntable, the turntable can be rotated until the light-through hole is located between the light-emitting part and the light-sensitive part, and the photoelectric switch is electrically connected to the welding mechanism through the controller.

[0015] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0017] Figure 1 This is a three-dimensional schematic diagram of the battery welding equipment during pre-welding according to an embodiment of the present invention;

[0018] Figure 2 for Figure 1 A cross-sectional schematic diagram in the AA direction;

[0019] Figure 3 for Figure 2 A partial enlarged schematic diagram of the battery welding equipment at point B during pre-welding;

[0020] Figure 4 for Figure 2 A partial enlarged schematic diagram of the battery welding equipment at point B during full-circle welding;

[0021] Figure 5 An exploded schematic diagram of a partial structure of a welding tool according to an embodiment of the present invention;

[0022] Figure 6 A three-dimensional schematic diagram of a cover casing positioning structure according to an embodiment of the present invention;

[0023] Figure 7 Schematic diagram of the loading and unloading mechanism according to an embodiment of the present invention;

[0024] Figure 8 The present invention provides a method and steps for using the battery welding equipment according to an embodiment of the present invention.

[0025] Reference numerals:

[0026] Battery 10;

[0027] Machine base 100;

[0028] Welding fixture 200, workpiece clamping position 201, clamping mechanism 210, bottom top pressure shaft 211, cover top pressure shaft 212, cover shell positioning structure 220, cover shell positioning hole 221, pre-welding through hole 222, opening and closing drive assembly 230, first movable seat 231, body 2311, elastic member 2312, buffer seat 2313, second movable seat 232, first driver 233, second driver 234, third movable seat 235, fourth movable seat 236, third driver 237, fourth driver 238, bottom positioning structure 240, bottom positioning hole 241;

[0029] Welding mechanism 300, welding head 310;

[0030] Rotation drive mechanism 400;

[0031] Welding control assembly 500;

[0032] Loading and unloading mechanism 600, clamping seat 610, clamping block 620, loading and unloading drive assembly 630, slide bar 631, return spring 632, connecting rod 633;

[0033] Material receiving box 700;

[0034] First axis L. DETAILED DESCRIPTION

[0035] The following describes embodiments of the present invention in detail. 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 only to explain the present invention and are not to be construed as limiting the present invention.

[0036] In the description of the present invention, it should be understood that descriptions involving orientation, such as the orientation or positional relationship indicated by up, down, etc., are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0037] In the description of the present invention, "a plurality" refers to more than two. The use of "first" or "second" is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of the indicated technical features, or implicitly indicating the order of the indicated technical features.

[0038] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0039] Reference Figures 1 to 8, which is a battery welding device according to an embodiment of the present invention, includes a base 100, a welding fixture 200, a welding mechanism 300 and a rotation drive mechanism 400. The welding fixture 200 is arranged on the base 100, and the welding fixture 200 includes a clamping mechanism 210 and a cover shell positioning structure 220. The clamping mechanism 210 is provided with a workpiece clamping position 201. The clamping mechanism 210 is rotatably arranged on the base 100 around a first axis, and the first axis is arranged along the left and right directions; the cover shell positioning structure 220 is rotatably arranged on the base 100 around the first axis, and the cover shell positioning structure 220 is provided with a cover shell positioning hole 221 along the first axis, and the cover shell positioning structure 220 is arranged along the left and right directions. It is movably arranged on the machine base 100 in the right direction so that the workpiece clamping position 201 can enter or leave the cover shell positioning hole 221. The cover positioning structure and the clamping mechanism 210 can rotate synchronously. The side wall of the cover shell positioning hole 221 is provided with a pre-welding through hole 222; the welding mechanism 300 is arranged on the machine base 100, and the welding mechanism 300 is provided with a welding head 310, which can be opposite to the workpiece clamping position 201; the rotation drive mechanism 400 is arranged on the machine base 100 and is used to drive the clamping mechanism 210 to rotate.

[0040] During equipment production, the battery to be welded is placed in the workpiece clamping position 201 of the clamping mechanism 210 of the welding fixture 200. The clamping mechanism 210 clamps the column shell and cover body of the battery, and then the cover shell positioning structure 220 of the welding fixture 200 moves toward the battery until the end of the battery close to the cover body enters the cover shell positioning hole 221. The side wall of the cover shell positioning hole 221 is sleeved on the cover body and column shell of the battery located at the workpiece clamping position 201, thereby forming an alignment positioning. Then the rotating drive mechanism 400 drives the clamping mechanism 210 and the cover shell positioning structure 220 to rotate synchronously, and the welding head 310 of the welding mechanism 300 pre-welds the connection between the cover body and the column shell through the pre-welding through hole 222. After the pre-welding is completed, the cover shell positioning structure 220 moves away from the battery until the battery is disengaged from the cover shell positioning hole 221. At this time, the welding head 310 can perform full-circle welding on the connection between the battery cover body and the column shell; after the battery welding is completed, the clamping mechanism 210 is released and the battery can be removed. In the above-mentioned battery welding equipment, the battery pre-welding step and the full-circumference welding step are performed in one welding tool 200, thereby improving production efficiency and product consistency.

[0041] Specifically, pre-welding can be understood as performing a certain number of spaced spot welds at a circle of connection between the battery cover and the column shell.

[0042] In an embodiment, the clamping mechanism 210 includes a bottom top pressure shaft 211 and a cover top pressure shaft 212. The welding tool 200 is provided with an opening and closing drive assembly 230. The bottom top pressure shaft 211 and the cover top pressure shaft 212 are rotatably arranged on the machine base 100 around a first axis. The bottom top pressure shaft 211 and the cover top pressure shaft 212 are opposite to each other and form a workpiece clamping position 201. The cover top pressure shaft 212 and / or the bottom top pressure shaft 211 are movable relative to the machine base 100 in the left and right directions. The opening and closing drive assembly 230 is provided on the machine base 100 and can drive the bottom top pressure shaft 211 and the cover top pressure shaft 212 to move closer to and away from each other. When the opening and closing drive assembly 230 drives the bottom top pressure shaft 211 and the cover top pressure shaft 212 to move closer to each other, the battery can be clamped, wherein the bottom top pressure shaft 211 abuts the bottom of the battery's column shell, and the cover top pressure shaft 212 abuts the battery's cover body. The battery can be released when the opening and closing driving assembly 230 drives the bottom top pressing shaft 211 and the cover top pressing shaft 212 to move away from each other. The above-mentioned clamping mechanism 210 has a simple structure, is easy to use, and is not likely to block the periphery of the battery.

[0043] It is understood that as long as one of the top pressure shaft 212 and the bottom pressure shaft 211 can move left and right, the two can move closer to or away from each other to clamp or release the battery. In this embodiment, both the top pressure shaft 212 and the bottom pressure shaft 211 can move left and right, thereby improving production convenience.

[0044] It is conceivable that the clamping mechanism 210 can also include two mutually hinged clamping arms, which can clamp or release the battery, and the clamping arms can rotate around the first axis relative to the base 100, thereby rotating the battery. In this case, the welding tool 200 also includes a cylinder, which is arranged on the base. The cylinder rod of the cylinder is pivotally connected to the clamping arm and drives the clamping arm to rotate to clamp or release the battery.

[0045] In this embodiment, the pre-welding through-hole 222 is arranged radially along the first axis to facilitate pre-welding of the welding head 310 of the welding mechanism 300 at the connection between the cylindrical shell and the cover of the battery. In this case, the welding head 310 is also oriented radially toward the first axis. It is conceivable that the pre-welding through-hole 222 can also be inclined radially relative to the first axis, in which case the direction of the welding head 310 is also changed accordingly.

[0046] In an embodiment, four pre-welding through-holes 222 are provided and evenly distributed around the first axis. Four pre-welding through-holes 222 are provided and evenly distributed around the first axis. When the end of the battery closest to the cover is located within the cover shell positioning hole 221, the welding head 310 can pass through the four pre-welding through-holes 222 and perform pre-welding in four directions around the battery circumference in sequence, so that the column shell and the cover body are relatively firmly bonded after pre-welding, and the cover body is not easily separated from the column shell. It is conceivable that the number of pre-welding through-holes 222 can also be other numbers, such as one, two, three, or more than four, and those skilled in the art can configure it according to actual production needs.

[0047] In an embodiment, the cover shell positioning hole 221 includes a hole side wall and a hole bottom wall, and the cover top pressure shaft 212 is provided through the cover shell positioning hole 221, and there is a gap between the outer periphery of the cover top pressure shaft 212 and the hole side wall of the cover shell positioning hole 221. In the above structure, the hole side wall of the cover shell positioning hole 221 can be aligned with the column shell and the cover body of the battery. When the hole bottom wall of the cover shell positioning hole 221 and the cover top pressure shaft 212 are in contact with the cover body of the battery, it is convenient for the battery, the cover top pressure shaft 212 and the cover shell positioning structure 220 to rotate synchronously. The structure is simple and easy to implement. It is conceivable that the outer periphery of the cover top pressure shaft 212 can also be in contact with the hole wall of the cover shell positioning hole 221. In this case, the cover shell positioning hole 221 is a straight hole arranged along the first axis.

[0048] In an embodiment, the welding fixture 200 further includes a bottom positioning structure 240, which is rotatably mounted on the base 100 about a first axis. The bottom positioning structure 240 is provided with a bottom positioning hole 241 along the first axis. The bottom positioning hole 241 is positioned opposite the cover housing positioning hole 221 and is located on the left and right sides of the workpiece clamping position 201, respectively. The bottom positioning structure 240 can rotate synchronously with the clamping mechanism 210. The bottom positioning structure 240 is provided with a bottom positioning hole 241. The sidewall of the bottom positioning hole 241 can be used to position the outer periphery of the end of the battery away from the cover, thereby more accurately positioning the battery and improving the welding accuracy of the battery housing.

[0049] In this embodiment, the bottom positioning structure 240 is movable in the left-right direction relative to the base 100 to enable the workpiece clamping portion 201 to enter or exit the bottom positioning hole 241. When the workpiece clamping portion 201 enters the bottom positioning hole 241, the bottom end of the battery can be better positioned; when the workpiece clamping portion 201 exits the bottom positioning hole 241, other mechanisms can be used to clamp the periphery of the battery to facilitate loading and unloading the battery from the welding fixture 200.

[0050] Specifically, the opening and closing drive assembly 230 also controls the left and right movement of the cover housing positioning structure 220 and the bottom positioning structure 240. It is conceivable that the clamping mechanism 210 can also be manually controlled to clamp or release the battery; the cover housing positioning structure 220 and the bottom positioning structure 240 can also be manually controlled to move left and right.

[0051] Specifically, the rotation drive mechanism 400 comprises a motor and a belt drive structure, which drives the clamping mechanism 210, the cover housing positioning structure 220, and the bottom positioning structure 240 for rotation via the belt drive structure. It is conceivable that the rotation drive mechanism 400 could also comprise a motor and a reduction gear set, with the motor driving the clamping mechanism 210, the cover housing positioning structure 220, and the bottom positioning structure 240 for rotation via the reduction gear set. In the mechanical field, there are numerous ways to drive components to rotate using motors, and those skilled in the art can configure specific configurations based on actual needs. It is conceivable that the rotation drive mechanism 400 could also employ a device that outputs rotational power, such as an internal combustion engine.

[0052] Specifically, the bottom positioning structure 240 is a bottom positioning shaft, and the bottom top pressure shaft 211 is passed through the bottom positioning shaft. The cover shell positioning structure 220 is a cover shell positioning shaft, and the cover top pressure shaft 212 is a cover top pressure shaft 212, and the cover top pressure shaft 212 is passed through the cover shell positioning shaft.

[0053] Specifically, there are many specific implementation methods for making the cover shell positioning structure 220, the clamping mechanism 210 and the bottom positioning structure 240 rotate synchronously, that is, making the bottom positioning structure 240 and the bottom top pressure shaft 211, the cover shell positioning structure 220 and the cover top pressure shaft 212 rotate synchronously. For example: when the bottom positioning structure 240, the bottom top pressure shaft 211, the cover shell positioning structure 220 and the cover top pressure shaft 212 all abut against the battery, the rotation driver directly drives the bottom positioning structure 240 to rotate, the bottom positioning structure 240 abuts against the battery to drive the battery to rotate, and the battery drives the bottom top pressure shaft 211, the cover top pressure shaft 212 and the cover shell positioning structure 220 to rotate synchronously through the abutment; or the rotation driver drives the bottom positioning structure 240 to rotate through the abutment. The belt transmission drives the bottom positioning structure 240 and the cover shell positioning structure 220 to rotate respectively, and a slider groove is set between the bottom positioning structure 240 and the bottom top pressure shaft 211, and the direction of the groove is along the first axis direction, and a slider groove is set between the cover shell positioning structure 220 and the cover top pressure shaft 212, and the direction of the groove is along the first axis direction to achieve synchronous rotation; or the rotation drive drives the bottom positioning structure 240, the bottom top pressure shaft 211, the cover shell positioning structure 220 and the cover top pressure shaft 212 to rotate synchronously through the belt transmission; in the mechanical field, there are many ways for the rotation drive to drive the four components to rotate synchronously, and those skilled in the art can make specific configurations according to actual needs.

[0054] It is conceivable that the bottom positioning structure 240 and the cover shell positioning structure 220 can both be cylindrical blocks or other shapes, with a bottom positioning hole 241 defined in the bottom positioning structure 240 and a cover shell positioning hole 221 defined in the cover shell positioning structure 220 .

[0055] In this embodiment, the bottom positioning hole 241 includes sidewalls and a bottom wall, with a gap between the outer periphery of the bottom top pressure shaft 211 and the sidewalls of the bottom positioning hole 241. With this structure, the sidewalls of the bottom positioning hole 241 can limit the outer periphery of the battery's cylindrical shell. When the bottom wall of the bottom positioning hole 241 and the bottom top pressure shaft 211 jointly contact the bottom end of the battery, the battery, the bottom top pressure shaft 211, and the bottom positioning structure 240 can be rotated synchronously. This structure is simple and easy to implement.

[0056] In the embodiment, the cover top pressure shaft 212 is movably arranged in the left-right direction relative to the base 100, the opening and closing drive assembly 230 includes a first movable base 231, a second movable base 232, a first driver 233 and a second driver 234, the first movable base 231 is movably arranged in the left-right direction on the base 100, the first driver 233 is arranged in the base 100 and is used to drive the first movable base 231 to move, the cover top pressure shaft 212 is arranged in the base 100 through the first movable base 231, the second movable base 232 is movably arranged in the left-right direction on the first movable base 231, the second driver 234 is arranged in the first movable base 231 and is used to drive the second movable base 232 to move, and the cover shell positioning structure 220 is arranged in the base 100 through the second movable base 232. The above structure can drive the cover top pressure shaft 212 and the cover shell positioning structure 220 to move in the left-right direction relative to the base 100, thereby facilitating the welding and loading and unloading of batteries. Specifically, the first driver 233 and the second driver 234 are both cylinders. The cylinder rod of the first driver 233 is connected to the first movable base 231, and the cylinder rod of the second driver 234 is connected to the second movable base 232. The first movable base 231 is slidably mounted on the machine base 100 by means of a slide rail and a slider, and the second movable base 232 is slidably mounted on the first movable base 231 by means of a slide rail and a slider. It is conceivable that the first driver 233 and the second driver 234 can also be linear motors or other mechanisms that output linear power; the first movable base 231 can also be slidably mounted on the machine base 100 by means of guide columns and guide sleeves, and the second movable base 232 can also be slidably mounted on the machine base 100 by means of guide columns and guide sleeves.

[0057] Specifically, the first movable seat 231 is provided with a first rotation hole, and the cover top pressure shaft 212 is rotatably set in the first rotation hole; the second movable seat 232 is provided with a second rotation hole, and the cover shell positioning structure 220 is rotatably set in the second rotation hole.

[0058] It is conceivable that the opening and closing drive assembly 230 can also drive the cover top pressure shaft 212 and the cover shell positioning structure 220 to move left and right through other structures. For example, the opening and closing drive assembly 230 includes a first movable seat 231, a second movable seat 232, a first driver 233 and a second driver 234. The first movable seat 231 is set on the machine base 100 by rolling along the left and right directions through rollers. The first driver 233 is set on the machine base 100 and is used to drive the first movable seat 231 to move. The cover shell positioning structure 220 is set on the machine base 100 through the first movable seat 231. The second movable seat 232 is set on the first movable seat 231 by rolling along the left and right directions through rollers. The second driver 234 is set on the first movable seat 231 and is used to drive the second movable seat 232 to move. The cover top pressure shaft 212 is set on the machine base 100 through the second movable seat 232. Or the opening and closing drive assembly 230 includes a first movable seat 231, a second movable seat 232, a first driver 233 and a second driver 234. The first driver 233 and the second driver 234 are both set on the machine base 100. The first movable seat 231 and the second movable seat 232 are both slidably set on the machine base 100 along the left and right directions by means of slide rail sliders. The first driver 233 drives the first movable seat 231 to move left and right, and the second driver 234 drives the second movable seat 232 to move left and right. The cover top pressure shaft 212 is rotatably set on the first movable seat 231, and the cover shell positioning structure 220 is rotatably set on the second movable seat 232.

[0059] In the embodiment, the bottom and top pressure shafts 211 are movably disposed in the left-right direction relative to the base 100. The opening and closing drive assembly 230 includes a third movable base 235, a fourth movable base 236, a third driver 237, and a fourth driver 238. The third movable base 235 is movably disposed in the left-right direction on the base 100. The third driver 237 is disposed on the base 100 and is used to drive the third movable base 235 to move. The bottom and top pressure shafts 211 are disposed on the base 100 via the third movable base 235. The fourth movable base 236 is movably disposed in the left-right direction on the third movable base 235. The fourth driver 238 is disposed on the third movable base 235 and is used to drive the fourth movable base 236 to move. The bottom positioning structure 240 is disposed on the base 100 via the fourth movable base 236. The above structure can drive the bottom and top pressure shafts 211 and the bottom positioning structure 240 to move in the left-right direction relative to the base 100, thereby facilitating battery welding and loading and unloading. Specifically, the third driver 237 and the fourth driver 238 are both cylinders. The cylinder rod of the third driver 237 is connected to the third movable base 235, and the cylinder rod of the fourth driver 238 is connected to the fourth movable base 236. The third movable base 235 is slidably mounted on the machine base 100 by means of a slide rail and a slider, and the fourth movable base 236 is slidably mounted on the third movable base 235 by means of a slide rail and a slider. It is conceivable that the third driver 237 and the fourth driver 238 can also be linear motors or other mechanisms that output linear power; the third movable base 235 can also be slidably mounted on the machine base 100 by means of guide columns and guide sleeves, and the fourth movable base 236 can also be slidably mounted on the machine base 100 by means of guide columns and guide sleeves.

[0060] Specifically, the third movable seat 235 is provided with a third rotating hole, and the bottom top pressure shaft 211 is rotatably provided in the third rotating hole; the fourth movable seat 236 is provided with a fourth rotating hole, and the bottom positioning structure 240 is rotatably provided in the fourth rotating hole.

[0061] It is conceivable that the opening and closing drive assembly 230 can also drive the bottom and top pressure shafts 211 and the bottom positioning structure 240 to move left and right through other structures. For example, the opening and closing drive assembly 230 includes a third movable seat 235, a fourth movable seat 236, a third driver 237 and a fourth driver 238. The third movable seat 235 is set on the machine base 100 by rolling along the left and right directions through rollers. The third driver 237 is set on the machine base 100 and is used to drive the third movable seat 235 to move. The bottom positioning structure 240 is set on the machine base 100 through the third movable seat 235. The fourth movable seat 236 is set on the third movable seat 235 by rolling along the left and right directions through rollers. The fourth driver 238 is set on the third movable seat 235 and is used to drive the fourth movable seat 236 to move. The bottom and top pressure shaft 211 is set on the machine base 100 through the fourth movable seat 236. Or the opening and closing drive assembly 230 includes a third movable seat 235, a fourth movable seat 236, a third driver 237 and a fourth driver 238. The third driver 237 and the fourth driver 238 are both set on the machine base 100. The third movable seat 235 and the fourth movable seat 236 are both slidably set on the machine base 100 along the left and right directions by means of slide rail sliders. The third driver 237 drives the third movable seat 235 to move left and right, and the fourth driver 238 drives the fourth movable seat 236 to move left and right. The bottom and top pressure shafts 211 are rotatably set on the third movable seat 235, and the bottom positioning structure 240 is rotatably set on the fourth movable seat 236.

[0062] Specifically, the first movable seat 231 includes a main body 2311, an elastic member 2312 and a buffer seat 2313. The cover top pressure shaft 212 is rotatably connected to the buffer seat 2313. The buffer seat 2313 is slidably arranged on the main body 2311 in the left-right direction. The main body 2311 is movably arranged on the base 100 in the left-right direction. The elastic member 2312 is arranged between the buffer seat 2313 and the main body 2311. The two ends of the elastic member 2312 are respectively in contact with the buffer seat 2313 and the main body 2311. Specifically, the main body 2311 is slidably arranged on the base 100 by means of a slider rail. The buffer seat 2313 is slidably arranged on the main body 2311 by means of a sliding fit between a guide column and a guide groove. The elastic member 2312 is a spring. The above structure enables the cover top pressure shaft 212 to apply appropriate top pressure to the battery, avoiding excessive top pressure that damages the battery, or excessive top pressure that causes the battery to loosen and fall. It is conceivable that the buffer seat 2313 can be slidably connected to the main body 2311 by means of a slide rail slider, and the main body 2311 can be slidably connected to the machine base 100 by means of a guide column and guide sleeve. The elastic member 2312 can use a gas spring or a low-power cylinder to realize the elastic function.

[0063] In the embodiment, the welding mechanism 300 is a laser welding mechanism 300, which facilitates pre-welding through the pre-welding through-hole 222. It is conceivable that the welding mechanism 300 can also be other welding mechanisms 300, such as a brazing mechanism, a resistance welding mechanism, etc.

[0064] In the embodiment, a loading and unloading mechanism 600 is further included, which is used to clamp or release the workpiece. The loading and unloading mechanism 600 is provided so that the loading and unloading of the battery can be automated, further improving production efficiency.

[0065] In an embodiment, the loading and unloading mechanism 600 includes a clamping seat 610, two clamping blocks 620 and an loading and unloading drive assembly 630. The clamping blocks 620 are radially slidably arranged on the clamping seat 610 along the first axis. The two clamping blocks 620 are arranged relative to each other. The loading and unloading drive assembly 630 is used to drive the clamping blocks 620 to move closer to and away from each other. When the loading and unloading drive assembly 630 drives the two clamping blocks 620 to move closer to each other, the battery can be clamped; when the loading and unloading drive assembly 630 drives the two clamping blocks 620 to move away from each other, the battery is released. Specifically, the clamping blocks 620 can be slidably arranged on the clamping seat 610 by means of a slide rail or a guide column and guide sleeve. It can be understood that the clamping seat 610 can be slidably arranged on the clamping seat 610 by means of a guide column and guide sleeve.

[0066] In an embodiment, the loading and unloading drive assembly 630 includes a cylinder, a slide bar 631, a return spring 632, and two connecting rods 633. The cylinder is arranged on the machine base 100, and the slide bar 631 is arranged to slide in the left and right directions on the clamping seat 610. One end of the connecting rod 633 is pivotally connected to the slide bar 631, and the other end is pivotally connected to the clamping block 620. The cylinder drives the slide bar 631 to move to the right, and the two ends of the return spring 632 respectively abut against the slide bar 631 and the clamping seat 610 to drive the slide bar 631 to move to the left. When the slide bar 631 moves left and right, the two clamping blocks 620 are driven closer to and away from each other through the two connecting rods 633. It is conceivable that the loading and unloading drive assembly 630 can also use two cylinders, which are respectively connected to the two clamping blocks 620, and the cylinders directly drive the clamping blocks 620 to move.

[0067] It is conceivable that the loading and unloading mechanism 600 may also be other structures, such as a three-axis manipulator.

[0068] Specifically, the battery welding equipment also includes a welding control assembly 500, which is used to control the opening and closing of the welding head 310 of the welding mechanism 300 during pre-welding. The welding head 310 is a laser welding head. The welding control assembly 500 includes a turntable, a photoelectric switch, and a controller. The turntable is disposed on the cover positioning structure 220 and rotates synchronously with the cover positioning structure. The turntable has a light hole. The photoelectric switch is disposed on the machine base 100. The photoelectric switch has a light-emitting portion and a light-sensing portion. The light-emitting portion and the light-sensing portion are respectively located on opposite sides of the turntable and are disposed toward the turntable. The turntable can be rotated until the light hole is located between the light-emitting portion and the light-sensing portion. The photoelectric switch is electrically connected to the welding mechanism 300 through the controller. The light hole corresponds to the pre-welding through hole 222. The light-emitting portion emits light toward the turntable. When the turntable rotates until the light hole is located between the light-emitting portion and the light-sensing portion, the light emitted by the light-emitting portion passes through the light hole and enters the light-sensing portion. At this time, the photoelectric switch controls the welding mechanism 300 to start welding. When the notch of the rotating disk is removed, welding stops. The above structure realizes the control of the light emission of the welding head 310 during pre-welding, and the control method is ingenious.

[0069] Specifically, the controller may be a PLC, a control host or a control circuit, etc.

[0070] Specifically, it also includes a material receiving box 700, which is arranged below the loading and unloading mechanism 600. When the battery welding is completed, the loading and unloading mechanism 600 can clamp and remove the battery, and then the loading and unloading mechanism 600 is released, and the battery falls into the material receiving box 700 below.

[0071] In this embodiment, a method for using the battery welding device is also provided, comprising the following steps:

[0072] S1: Place the battery at the workpiece clamping position 201, and use the opening and closing drive assembly 230 to drive the bottom top pressure shaft 211 and the cover top pressure shaft 212 of the clamping mechanism 210 to move closer to each other and clamp the battery;

[0073] S2: Move the cover positioning structure 220 and the bottom positioning structure 240 toward the battery so that the end of the battery close to the cover enters the cover positioning hole 221 and the end of the battery away from the cover enters the bottom positioning hole 241;

[0074] S3: Use the rotation drive mechanism 400 to drive the cover shell positioning structure 220, the bottom positioning structure 240, the clamping mechanism 210 and the battery to rotate synchronously, and the welding head 310 of the welding mechanism 300 pre-welds the connection between the column shell and the cover body of the battery through the welding through hole;

[0075] S4: Move the cover shell positioning structure 220 away from the battery to fully expose the connection between the battery column shell and the cover body, and the welding head 310 of the welding mechanism 300 performs full-circumference welding on the connection between the battery column shell and the cover body;

[0076] S5: Turn off the rotation drive mechanism 400, use the opening and closing drive assembly 230 to drive the bottom top pressure shaft 211 and the cover top pressure shaft 212 of the clamping mechanism 210 to move away from each other to release the battery, and then take out the welded battery.

[0077] The above-mentioned method of use has good welding accuracy and does not require replacement of the welding tool 200.

[0078] Specifically, the loading and unloading mechanism 600 first clamps the periphery of the battery. After the clamping mechanism 210 clamps the battery, the loading and unloading mechanism 600 releases the battery. Before the clamping mechanism 210 releases the battery, the loading and unloading mechanism 600 re-clamps the welded battery, and then the clamping mechanism 210 releases the battery.

[0079] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative uses of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0080] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A battery welding device, characterized in that: include: Machine base (100); A welding tool (200) is provided on the machine base (100), and the welding tool (200) comprises a clamping mechanism (210) and a cover shell positioning structure (220). The clamping mechanism (210) is provided with a workpiece clamping position (201). The clamping mechanism (210) is rotatably provided on the machine base (100) around a first axis, and the first axis is provided in a left-right direction. The cover shell positioning structure (220) is rotatably provided on the machine base (100) around the first axis. The cover shell positioning structure (220) is provided with a cover shell positioning hole (221) along the first axis direction, the cover shell positioning structure (220) is movably provided on the machine base (100) along the left-right direction so that the workpiece clamping position (201) can enter or leave the cover shell positioning hole (221), the cover shell positioning structure (220) and the clamping mechanism (210) can rotate synchronously, and a pre-welded through hole (222) is provided on the side wall of the cover shell positioning hole (221); A welding mechanism (300) is provided on the machine base (100), wherein the welding mechanism (300) is provided with a welding head (310), and the welding head (310) can be opposite to the workpiece clamping position (201); A rotation drive mechanism (400) is provided on the machine base (100) and is used to drive the clamping mechanism (210) to rotate; The clamping mechanism (210) includes a bottom top pressure shaft (211) and a cover top pressure shaft (212); the welding tool (200) is provided with an opening and closing drive assembly (230); the bottom top pressure shaft (211) and the cover top pressure shaft (212) are rotatably arranged on the machine base (100) around the first axis; the bottom top pressure shaft (211) and the cover top pressure shaft (212) are opposite to each other on the left and right and form the workpiece clamping position (201); the cover top pressure shaft (212) and / or the bottom top pressure shaft (211) are movably arranged in the left and right directions relative to the machine base (100); the opening and closing drive assembly (230) is provided on the machine base (100) and can drive the bottom top pressure shaft (211) and the cover top pressure shaft (212) to move closer to and away from each other; A loading and unloading mechanism (600) for clamping or releasing a workpiece; A material receiving box (700) is arranged below the loading and unloading mechanism (600); The welding tool (200) further includes a bottom positioning structure (240), the bottom positioning structure (240) being rotatably arranged on the machine base (100) around the first axis, the bottom positioning structure (240) being provided with a bottom positioning hole (241) along the first axis, the bottom positioning hole (241) being opposite to the cover shell positioning hole (221) on the left and right sides and respectively located on the left and right sides of the workpiece clamping position (201), and the bottom positioning structure (240) being capable of rotating synchronously with the clamping mechanism (210).

2. The battery welding equipment according to claim 1, characterized in that: The pre-welding through hole (222) is arranged along the radial direction of the first axis.

3. The battery welding equipment according to claim 2, characterized in that: At least two pre-welding through holes (222) are provided and are evenly distributed around the first axis.

4. The battery welding equipment according to claim 1, characterized in that: The bottom positioning structure (240) is movably arranged in the left-right direction relative to the machine base (100) so that the workpiece clamping position (201) can enter or leave the bottom positioning hole (241).

5. The battery welding equipment according to claim 1, characterized in that: The cover top pressure shaft (212) is movably arranged in the left-right direction relative to the machine base (100); the opening and closing drive assembly (230) includes a first movable seat (231), a second movable seat (232), a first driver (233) and a second driver (234); the first movable seat (231) is movably arranged on the machine base (100) in the left-right direction; the first driver (233) is arranged on the machine base (100) and is used to drive the first movable seat (231) to move; the cover top pressure shaft (212) is arranged on the machine base (100) through the first movable seat (231); the second movable seat (232) is movably arranged on the first movable seat (231) in the left-right direction; the second driver (234) is arranged on the first movable seat (231) and is used to drive the second movable seat (232) to move; and the cover shell positioning structure (220) is arranged on the machine base (100) through the second movable seat (232).

6. The battery welding equipment according to claim 1, characterized in that: The bottom and top pressure shafts (211) are movably arranged in the left and right directions relative to the machine base (100), and the opening and closing drive assembly (230) includes a third moving seat (235), a fourth moving seat (236), a third driver (237) and a fourth driver (238). The third moving seat (235) is movably arranged in the left and right directions on the machine base (100), and the third driver (237) is arranged on the machine base (100) and is used to drive the third moving seat (235). 5) action, the bottom top pressure shaft (211) is set on the machine base (100) through the third movable seat (235), the fourth movable seat (236) is movably set on the third movable seat (235) along the left and right directions, the fourth driver (238) is set on the third movable seat (235) and is used to drive the fourth movable seat (236) to move, and the bottom positioning structure (240) is set on the machine base (100) through the fourth movable seat (236).

7. The battery welding equipment according to claim 5, characterized in that: The first movable seat (231) includes a main body (2311), an elastic member (2312) and a buffer seat (2313); the cover top pressure shaft (212) is rotatably connected to the buffer seat (2313); the buffer seat (2313) is slidably arranged on the main body (2311) along the left and right directions; the main body (2311) is movably arranged on the machine base (100) along the left and right directions; the elastic member (2312) is arranged between the buffer seat (2313) and the main body (2311); and the two ends of the elastic member (2312) are respectively in contact with the buffer seat (2313) and the main body (2311).

8. The battery welding equipment according to claim 1, characterized in that: The battery welding device further comprises a welding control assembly (500), the welding control assembly (500) being used for controlling the opening and closing of the welding head (310) of the welding mechanism (300) during pre-welding; the welding head (310) is a laser welding head; the welding control assembly (500) comprises a turntable, a photoelectric switch and a controller, the turntable being arranged on the cover shell positioning structure (220) and rotating synchronously with the cover shell positioning structure (220), the turntable being provided with a light-through hole, the photoelectric switch being arranged on the machine base (100), the photoelectric switch having a light-emitting portion and a light-sensitive portion, the light-emitting portion and the light-sensitive portion being respectively located on opposite sides of the turntable and arranged toward the turntable, the turntable being capable of rotating until the light-through hole is located between the light-emitting portion and the light-sensitive portion, and the photoelectric switch being electrically connected to the welding mechanism (300) via the controller.

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