Battery case bottom welding device

Abstract

The utility model provides a battery case bottom welding device, which comprises a conveying belt, a bottom welding device, a bottom welding device, a bottom welding device, a bottom welding device, a bottom welding device, a bottom welding device and a bottom welding device, and is characterized in that the conveying belt is provided with a groove used for accommodating and conveying a battery to be welded; the rotating mechanism is used for rotating the battery with the bottom to be welded for at least one circle; the lifting mechanism is arranged on one side of the conveying belt; and the welding mechanism is arranged on the lifting mechanism, and the welding end of the welding mechanism can extend into the battery in a lifting mode, abuts against the bottom and rotates along with the battery so as to circumferentially weld the bottom of the battery and a battery shell. The battery bottom welding device is compact in structure, all parts work cooperatively, welding of the bottom of a battery is achieved, manpower is saved, and welding efficiency is improved.

Description

Technical Field

[0001] This disclosure relates to the field of power battery welding technology, and in particular to a battery casing bottom welding device. Background Technology

[0002] Currently, in addition to manual welding with a handheld welding gun, there are some welding equipment for welding the bottom plate of lithium battery casings. For example, there is a lithium battery casing bottom plate welding equipment with Chinese utility model patent publication number CN114346567A. This equipment integrates welding, grinding and marking functions, but it requires manual material changing or robotic arm loading to place the battery on the placement plate for each workpiece. It is suitable for small and medium-scale production, but the equipment has a complex structure, large size and large footprint. Utility Model Content

[0003] The purpose of this disclosure is to provide a battery casing bottom welding device to solve the aforementioned problems existing in the prior art.

[0004] To achieve the above objectives, the technical solutions adopted in the embodiments of this disclosure are as follows:

[0005] This disclosure provides a battery casing bottom welding device, the device comprising: a conveyor belt with a groove for accommodating and conveying a battery to be welded at its bottom; a rotating mechanism for rotating the battery to be welded at least one revolution; a lifting mechanism disposed on one side of the conveyor belt; and a welding mechanism disposed on the lifting mechanism, wherein the welding end of the welding mechanism can be raised and lowered to extend into the battery and abut against the bottom, and circumferentially welds the bottom of the battery to the battery casing as the battery rotates.

[0006] Optionally, the rotating mechanism is located at the welding position of the conveyor belt, and the welding mechanism is located above the welding position with the welding end facing the welding position. When the battery to be welded moves to the welding position, the rotating mechanism clamps the battery, the welding end penetrates into the welding area inside the battery, the rotating mechanism rotates the battery, and the welding end performs circumferential welding between the bottom of the battery and the battery casing.

[0007] Optionally, notches are provided on opposite sides of the central area of ​​the conveyor belt; the rotating mechanism includes: a driving wheel, disposed in one notch of the groove of the conveyor belt; and a driven wheel, retractably disposed in the other notch of the groove of the conveyor belt; when the battery to be welded moves between the driving and driven wheels, the driven wheel extends and abuts against the two sides of the battery with the driving wheel, so that the battery rotates with the wheel.

[0008] Optionally, the driven wheel is connected to a drive motor to drive the driven wheel to move into and out of the groove; the driven wheel includes two spaced sub-wheels, with the center line of the two sub-wheels facing the center of the main wheel.

[0009] Optionally, the conveyor belt includes: a welding section, which is equipped with the rotating mechanism and the welding mechanism for welding the battery at that position; an input section for receiving and conveying the battery to be welded at the bottom of the welding section; and an output section for receiving the battery welded by the welding section and outputting it.

[0010] Optionally, the conveyor belt further includes a transfer section, located near the welding section of the input section, for sequentially conveying the batteries to be welded at the bottom to the welding section.

[0011] Optionally, the transfer section includes: a connecting section disposed at the input section, dividing the input section into a first input section and a second input section, wherein the connecting section is perpendicularly connected to the first and second input sections respectively, so that the two input sections are parallelly misaligned; a first driving pusher disposed at the entrance of the connecting section, with a pushing direction perpendicular to the first input section, for pushing the battery with the bottom to be welded conveyed by the first input section to the exit of the connecting section; and a second driving pusher disposed at the exit of the connecting section, for pushing the battery with the bottom to be welded at the exit of the connecting section into the second input section.

[0012] Optionally, the lifting mechanism includes: a bracket with a vertical slide rail; a slider slidably mounted on the slide rail; a linear drive mechanism mounted on the bracket with its telescopic end connected to the slider; and an elastic compression mechanism mounted on one side of the slider and elastically connected to the welding mechanism on the other side.

[0013] Optionally, the elastic compression mechanism includes: a base, one side of which is disposed on the slider, and the other side of which is disposed on a guide rail, and the top of the base is provided with a lug facing the conveyor belt, the guide rail being used to slide and connect the groove of the welding mechanism body; an elastic element, with the lug and the welding mechanism respectively connected at both ends; when the battery to be welded moves to the rotating mechanism, the rotating mechanism clamps the battery, the linear drive mechanism drives the slider to move downward, the welding mechanism moves into the battery, the end of the welding needle abuts against the welding position at the bottom of the battery, the rotating mechanism rotates the battery circumferentially, the welding needle performs circumferential welding, and the end of the welding needle is kept abutting against the bottom of the battery under the pressure of the elastic element, thus completing the welding.

[0014] Optionally, the device further includes: a pushing mechanism, disposed at the inlet of the conveyor belt, used to push the battery to be welded to the welding position after the battery at the bottom of the conveyor belt enters the conveyor belt;

[0015] or

[0016] The device further includes a feeding mechanism for sequentially feeding batteries onto a conveyor belt to move the batteries toward the welding position.

[0017] The beneficial effects of the embodiments disclosed herein are:

[0018] The battery casing bottom welding device of this disclosure is suitable for mass welding of battery bottoms, has a high degree of automation, fast welding efficiency, reduces manual intervention in the welding process, and has a compact structure and small footprint. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a battery casing bottom welding device according to an embodiment of the present disclosure;

[0020] Figure 2 This is a top view of a battery casing bottom welding device according to an embodiment of the present disclosure.

[0021] In the picture,

[0022] 100. Conveyor belt; 110. Notch; 120. Welding section; 130. Input section; 131. Connecting section; 132. First driving pusher; 133. Second driving pusher; 140. Output section; 200. Rotating mechanism; 210. Driving wheel; 220. Driven wheel; 221. Sub-wheel; 300. Lifting mechanism; 310. Bracket; 311. Vertical slide rail; 320. Slider; 330. Linear drive mechanism; 340. Elastic compression mechanism; 341. Base; 342. Elastic element; 400. Welding mechanism; 410. Body; 420. Welding needle. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the embodiments of this disclosure will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the embodiments of this disclosure and are not intended to limit the embodiments of this disclosure.

[0024] like Figure 1 As shown in the present disclosure, an embodiment of a battery casing bottom welding device is provided. The device includes: a conveyor belt 100 with a groove for accommodating and conveying a battery to be welded at its bottom; a rotating mechanism 200 for rotating the battery to be welded at least one revolution; a lifting mechanism 300 disposed on one side of the conveyor belt 100; and a welding mechanism 400 disposed on the lifting mechanism 300, wherein the welding end of the welding mechanism 400 can be raised and lowered to extend into the battery and abut against the bottom, and circumferentially welds the bottom of the battery to the battery casing as the battery rotates.

[0025] The welding apparatus of this disclosure can be applied to the bottom welding of cylindrical lithium batteries, but is not limited thereto. Batteries to be welded are sequentially transported to a rotating mechanism via a conveyor belt, then through a lifting mechanism and a welding mechanism. After welding, they are sequentially output by the conveyor belt, achieving fully automated welding. This is suitable for large-scale automated mass production. The batteries on the conveyor belt can be directly transported from the previous process, or they can be manually or mechanically placed. The bottom of the battery to be welded is initially snapped into place with the outer casing, and then sealed after welding.

[0026] In this embodiment, the welding mechanism is positioned above the rotating mechanism, with the welding end specifically positioned above the welding position. The conveyor belt is a long strip structure with a U-shaped groove. The battery to be welded is placed in the U-shaped groove, with its bottom facing down and its opening facing up. The battery is placed on the conveyor belt and moves forward with it. There are notches on opposite sides of the central area of ​​the conveyor belt. The rotating mechanism is positioned at these notches and rotates the battery that has moved to the rotating mechanism position. Before rotation, the battery is clamped. The lifting mechanism moves the welding mechanism downwards, and the welding end extends into the battery, abutting against the bottom edge of the battery. The rotating mechanism rotates the battery while the welding end performs welding. After one full rotation, the bottom and outer casing are welded. The lifting mechanism raises the welding mechanism, the welding end moves out of the battery, and the rotating mechanism releases the welded battery. The welded battery moves to the next position, and the next battery to be welded moves to the welding position of the rotating mechanism. The components of the welding device in this embodiment can be electrically controlled, achieving fully automated welding, reducing human intervention, and improving welding efficiency. The bottom of the conveyor belt can be equipped with a conveyor track or other structure to achieve automatic battery transfer. Alternatively, the conveyor belt may not have a track. The specific structure of the conveyor belt can be set according to the actual situation.

[0027] like Figure 1 As shown, the rotating mechanism 200 is located at the welding position of the conveyor belt 100, and the welding mechanism 400 is located above the welding position with the welding end facing the welding position. When the battery to be welded moves to the welding position, the rotating mechanism 200 clamps the battery, the welding end penetrates into the welding area inside the battery, the rotating mechanism 200 rotates the battery, and the welding end performs circumferential welding between the bottom of the battery and the battery shell.

[0028] In this embodiment, the rotating mechanism is located at the welding position and is used to rotate the battery delivered to that position to achieve circumferential welding of the bottom of the battery and the outer casing. The welding process is completed automatically and can be done using metal welding.

[0029] like Figure 1As shown, the conveyor belt 100 has notches 110 on both sides of its central region; the rotating mechanism 200 includes: a driving wheel 210, which is disposed in the notch 110 on one side of the groove of the conveyor belt 100; and a driven wheel 220, which is retractably disposed in the notch 110 on the other side of the groove of the conveyor belt 100; when the battery to be welded moves between the driving and driven wheels 220, the driven wheel 220 extends and abuts against the two sides of the battery with the driving wheel 210, so that the battery rotates with the rotation of the wheel.

[0030] In this embodiment, the conveyor belt has a notch that divides it into two sections. Other structures, such as those with a driving pulley and a driven pulley, can replace this notch. The driving pulley is located outside the notch, and the driven pulley is retractably located in the other notch. When the driven pulley retracts, the battery can pass through the pulley mechanism. When the driven pulley rotates and extends into the groove, it can clamp the battery between the driving and driven pulleys. The driving pulley is connected to a motor, which will not be described in detail here.

[0031] like Figure 1 As shown, the driven wheel 220 is connected to a drive motor to drive the driven wheel 220 to move into and out of the groove; the driven wheel 220 includes two spaced sub-wheels 221, with the center line of the two sub-wheels 221 facing the center of the main wheel.

[0032] In this embodiment, two spaced sub-rollers are disposed on one side of a fixed plate, and one end of a drive rod is connected to the other side of the fixed plate. The other end of the drive rod is connected to a drive motor, allowing the sub-rollers to extend and retract. The sidewall of the drive roller can be flush with the inner sidewall of the conveyor belt to allow the battery to pass smoothly. When the driven roller extends into the groove, the two sub-rollers also serve to align the battery, holding it between the two sub-rollers. When the battery moves to the welding position, there will be a certain positional deviation. The two sub-rollers can correct the positional deviation of the battery. When the sub-rollers move towards the drive roller, they push the battery to abut against the drive roller, clamping the battery. When the drive roller rotates, the sub-rollers cooperate, and the battery will rotate along with it.

[0033] like Figure 2 As shown, the conveyor belt 100 includes: a welding section 120, which is provided with the rotating mechanism 200 and the welding mechanism 400 for welding the battery at that position; an input section 130 for receiving and conveying the battery to be welded to the bottom of the welding section 120; and an output section 140 for receiving the battery welded by the welding section 120 and outputting it.

[0034] In this embodiment, the notch in the output belt can divide the conveyor belt into an input section and an output section. The notch is located in the welding section. The input section can be set to automatically transfer batteries via the track. After the battery enters the input section, it is driven forward by the movement of the track. The battery enters the welding section, which is the welding position. Under the action of the rotation mechanism, the lifting mechanism and the welding mechanism, the welding is completed. Then, it moves to the output section under the push of the next battery.

[0035] like Figure 2 As shown, the conveyor belt 100 further includes a transfer section, which is located in the input section 130 near the welding section 120, for sequentially conveying the batteries to be welded at the bottom to the welding section 120.

[0036] It should be noted that the transfer section makes the input section non-linearly connected; it is divided into two parallel and staggered sections. The transfer section is close to the welding section to reduce deviations during long-distance transmission and improve the accuracy of the battery moving to the welding position. The input section can be equipped with a track for automatic battery transfer, while the welding end and output section can be without tracks, relying on external thrust to move the battery.

[0037] Specifically, such as Figure 2 As shown, the transfer section includes: a connecting section 131, disposed at the input section 130, dividing the input section 130 into a first input section and a second input section, wherein the connecting section 131 is perpendicularly connected to the first and second input sections respectively, so that the two input sections are parallelly misaligned; a first driving pusher 132, disposed at the entrance of the connecting section 131, with a pushing direction perpendicular to the first input section, used to push the battery with the bottom to be welded conveyed by the first input section to the outlet of the connecting section 131; and a second driving pusher 133, disposed at the outlet of the connecting section, used to push the battery with the bottom to be welded at the outlet of the connecting section 131 into the second input section.

[0038] In this embodiment, the connecting segment is located near the welding segment of the input segment, dividing the input segment into two ends: a first input segment and a second input segment. The two ends of the connecting segment are perpendicular to the first and second input segments, respectively. The inlet and outlet of the connecting segment are connected to the outlet of the first input segment and the inlet of the second input segment, respectively. The first input segment is equipped with a tracked automatic battery transfer mechanism, while the second input segment is not equipped with a track. The battery is moved towards the welding end by a first and a second driving pusher. The telescopic end of the first driving pusher is located on the inlet side of the connecting section. When the telescopic end of the first driving pusher retracts, it is located on the outlet side of the first input section, and the connecting section is connected to the first input section, facilitating the movement of the battery through the outlet of the first input section into the connecting section. When the telescopic end of the first driving pusher extends, it pushes the battery entering the first input section toward the outlet of the connecting section. The telescopic end of the second driving pusher is located on the outlet side of the connecting section. When the telescopic end of the second driving pusher retracts, it is located on the inlet side of the second input section, and the connecting section is connected to the second input section, facilitating the movement of the battery through the outlet of the connecting section into the second input section. When the telescopic end of the second driving pusher extends, it pushes the battery entering the connecting section toward the inlet of the second input section.

[0039] In this embodiment, the battery is transported entirely by a track, which can easily increase the movement deviation during the battery transport process. The design of the transition section reduces the deviation of the battery when it moves to the welding position, so as to more accurately deliver the battery to be welded at the welding position.

[0040] like Figure 1 As shown, the lifting mechanism 300 includes: a bracket 310 with a vertical slide rail 311; a slider 320 slidably mounted on the slide rail; a linear drive mechanism 330 mounted on the bracket 310 with its telescopic end connected to the slider 320; and an elastic compression mechanism 340 with one side mounted on the slider 320 and the other side elastically connected to the welding mechanism 400.

[0041] The linear drive mechanism in this embodiment can be driven by a cylinder, which is mounted on the top wall of the support. The telescopic end passes through the top wall and is connected to the slider to drive the slider to slide along the slide rail. An elastic compression mechanism connects the slider and the elastic welding mechanism. The welding mechanism is equipped with a welding needle. When welding is required, the linear drive mechanism drives the slider downwards, which in turn drives the elastic compression mechanism downwards. Under elastic pressure, the welding mechanism allows the welding needle to penetrate deep into the bottom of the battery to be welded and abut against it. During welding, as the battery rotates circumferentially, circumferential welding is achieved between the battery bottom and the outer casing. During welding, the metal needle is consumed, but under the elastic pressure of the elastic compression mechanism, the tip of the welding needle remains in contact with the bottom of the battery.

[0042] like Figure 1As shown, the elastic compression mechanism 340 includes: a base 341, one side of which is disposed on the slider 320, and the other side of which is disposed on a guide rail. The top of the base 341 has a lug facing the conveyor belt 100. The guide rail is used to connect to the groove of the welding mechanism 400 body. An elastic element 342 has its two ends connected to the lug and the welding mechanism 400, respectively. When the battery to be welded moves to the rotating mechanism 200, the rotating mechanism 200 clamps the battery. The linear drive mechanism 330 drives the slider 320 downwards, and the welding mechanism 400 moves into the battery. The end of the welding needle 420 abuts against the welding position at the bottom of the battery. The rotating mechanism 200 rotates the battery circumferentially, and the welding needle 420 performs welding. Under the pressure of the elastic element 342, the end of the welding needle 420 remains in contact with the bottom of the battery, completing the welding. After the welding needle 420 is consumed, it can be replaced according to the actual situation. The length of the welding needle 420, the lifting mechanism 300, and the pressure of the elastic element 342 ensure that at least one battery bottom is welded at a time.

[0043] In this embodiment, the welding mechanism includes a body 410 and a welding needle 420. A groove is provided on one side of the body, and the groove is slidably connected to a guide rail. The elastic element can be a compression spring. A guide post can be provided on the lug of the base. One end of the elastic element is connected to the lug of the base and sleeved on the outside of the guide post. Two lugs can be provided, located on opposite sides of the bottom wall. Both ends of the elastic element are connected to the welding mechanism. The welding mechanism can be a metal electric welding system. After energizing, the end of the welding needle abuts against the edge of the battery bottom where it connects to the bottom of the casing, i.e., the welding position, for welding. During the welding process, the welding needle, as welding material, will gradually be consumed and shortened, but under the pressure of the elastic element, the end of the welding needle remains in contact with the bottom of the battery, completing the welding.

[0044] The device further includes a pushing mechanism, which is located at the entrance of the conveyor belt and is used to push the battery to the welding position after the battery to be welded enters the conveyor belt.

[0045] Alternatively, the device may further include a feeding mechanism for sequentially feeding batteries onto a conveyor belt to move the batteries toward the welding position.

[0046] The pushing mechanism and feeding mechanism of this embodiment can be set according to actual conditions to improve welding efficiency.

[0047] The above description is only a preferred embodiment of the present disclosure. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present disclosure, and these improvements and modifications should also be considered within the protection scope of the present disclosure.

Claims

1. A battery casing bottom welding device, characterized in that, The device includes: The conveyor belt (100) is provided with grooves for receiving and conveying the battery to be welded at the bottom; A rotating mechanism (200) is used to rotate the battery at the bottom to be welded at least once; A lifting mechanism (300) is disposed on one side of the conveyor belt (100); A welding mechanism (400) is provided on the lifting mechanism (300). The welding end of the welding mechanism (400) can be raised and lowered to extend into the battery and abut against the bottom. As the battery rotates, it welds the bottom of the battery and the battery casing in a circumferential manner.

2. The apparatus according to claim 1, characterized in that, The rotating mechanism (200) is located at the welding position of the conveyor belt (100), and the welding mechanism (400) is located above the welding position with the welding end facing the welding position; When the battery at the bottom to be welded is moved to the welding position, the rotating mechanism (200) clamps the battery, the welding end penetrates into the welding area inside the battery, the rotating mechanism (200) rotates the battery, and the welding end performs circumferential welding between the bottom of the battery and the battery casing.

3. The apparatus according to claim 1, characterized in that, The conveyor belt (100) has notches (110) on both sides opposite to each other in the central region; the rotating mechanism (200) includes: An active rotating wheel (210) is disposed in a notch (110) on one side of the groove of the conveyor belt (100); The driven wheel (220) is retractably disposed in the notch (110) on the other side of the groove of the conveyor belt (100); When the battery at the bottom to be welded moves between the main and driven rotating wheels (220), the driven rotating wheel (220) extends out and abuts against the two sides of the battery with the main rotating wheel (210), so that the battery rotates with the rotating wheel.

4. The apparatus according to claim 3, characterized in that, The driven wheel (220) is connected to a drive motor to drive the driven wheel (220) to move into and out of the groove; The driven wheel (220) includes two spaced sub-wheels (221), with the center line of the two sub-wheels (221) facing the center of the main wheel.

5. The apparatus according to any one of claims 1 to 4, characterized in that, The transmission belt (100) includes: A welding section (120) is provided with the rotating mechanism (200) and the welding mechanism (400) for welding the battery in that position; The input section (130) is used to receive and feed the battery to be welded to the welding section (120); The output section (140) is used to receive and output the battery after it has been welded by the welding section (120).

6. The apparatus according to claim 5, characterized in that, The conveyor belt (100) further includes a transfer section, located near the welding section (120) of the input section (130), for sequentially conveying the batteries to be welded at the bottom to the welding section (120).

7. The apparatus according to claim 6, characterized in that, The transit segment includes: A connecting segment (131) is provided on the input segment (130) to divide the input segment (130) into a first input segment and a second input segment. The connecting segment (131) is perpendicularly connected to the first and second input segments respectively, so that the two input segments are parallelly misaligned. A first driving pusher (132) is disposed at the inlet of the connecting section (131) and the pushing direction is perpendicular to the first input section. It is used to push the battery at the bottom to be welded, which is conveyed by the first input section, to the outlet of the connecting section (131). The second drive pusher (133) is disposed at the outlet of the connecting section and is used to push the battery at the bottom to be welded at the outlet of the connecting section (131) into the second input section.

8. The apparatus according to any one of claims 1 to 4, characterized in that, The lifting mechanism (300) includes: a bracket (310) and a vertical slide rail (311); A slider (320) is slidably disposed on the slide rail; A linear drive mechanism (330) is mounted on a bracket (310), and its telescopic end is connected to the slider (320); An elastic compression mechanism (340) is disposed on one side of the slider (320) and elastically connected to the welding mechanism (400) on the other side.

9. The apparatus according to claim 8, characterized in that, The elastic compression mechanism (340) includes: The base (341) has a side disposed on the slider (320) and a guide rail disposed on the other side. The top of the base (341) is provided with a lug facing the conveyor belt (100). The guide rail is used to slide and connect the groove of the welding mechanism body (410). The elastic element (342) is connected to lugs and welding mechanism (400) at both ends respectively; When the battery at the bottom to be welded moves to the rotating mechanism (200), the rotating mechanism (200) clamps the battery, the linear drive mechanism (330) drives the slider (320) to move downward, and the welding mechanism (400) moves into the battery accordingly. The end of the welding needle (420) abuts against the bottom welding position of the battery. The rotating mechanism (200) rotates the battery circumferentially, and the welding needle (420) performs circumferential welding. Under the pressure of the elastic element (342), the end of the welding needle (420) is kept abutting against the bottom of the battery, and the welding is completed.

10. The apparatus according to any one of claims 1 to 4, characterized in that, The device further includes: The pushing mechanism is located at the entrance of the conveyor belt (100). After the battery to be welded enters the conveyor belt (100), it is used to push the battery to the welding position. or The device further includes: The feeding mechanism is used to sequentially feed batteries onto the conveyor belt (100) to push the batteries toward the welding position.

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