Laser welding machine

Abstract

The utility model relates to the field of assembly of a battery cell and an electrode current disc, in particular to a laser welding machine, which comprises a body provided with a laser welding head, and is characterized by further comprising a positioning device, the positioning device comprises a device body, a first positioning piece and a second positioning piece, and the first positioning piece and the second positioning piece are connected with the device body through a detachable structure. According to the utility model, a new detachable structure is added, so that the purpose of replacing the positioning piece is achieved, the positioning piece is used as a jig for positioning the battery cell and the electrode flow disc, and can be matched with the battery cell and the electrode flow disc of other specifications after being replaced with different models, so that the basic matching problem is solved, and the production efficiency is improved. Welding between the battery cells and the electrode flow discs of different models is compatible, and the electrode flow discs and the battery cells of different models are smoothly welded.

Description

Technical Field

[0001] This utility model relates to the field of assembling battery cells and current collectors, and more particularly to laser welding machines. Background Technology

[0002] At the beginning and end of the battery cell, current collectors for the positive and negative electrodes are welded on, which is an assembly process that all battery cells must go through.

[0003] However, the iteration of battery cells has led to various different models, such as 18650, 18500, 14500, 26650, and 46800. These numbers include the size parameters of the battery cells. In the rapidly developing field of battery cells, the design of early welding equipment did not take into account the significant changes in the size parameters of the battery cells. Therefore, these welding equipment have compatibility issues with new battery cells, especially the most popular model recently, the 46800 battery cell. Basic positioning problems prevent the subsequent current collector welding process from being carried out in sequence. Utility Model Content

[0004] To address the aforementioned problems, this invention provides a laser welding machine that is suitable for different types of battery cells and current collectors, thus solving the problem of being unable to position and weld new battery cells.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: a laser welding machine, comprising a body, on which a laser welding head is provided, characterized in that it further comprises a positioning device, the positioning device comprising a device body and a first positioning member and a second positioning member connected to the device body via a detachable structure, the first positioning member and the second positioning member respectively fixing the battery cell and the current collector.

[0006] The beneficial effects of this utility model are:

[0007] This utility model adds a new detachable structure to achieve the purpose of replacing the positioning component. The positioning component serves as a fixture for positioning the battery cell and current collector. After changing to different models, it can fit other specifications of battery cells and current collectors, thus solving the basic fit problem and enabling welding between different models of battery cells and current collectors, allowing for the smooth welding of different models of current collectors and battery cells.

[0008] The aforementioned detachable structure includes a first detachable structure and a second detachable structure. The device body also includes a flipping assembly. The output end of the flipping assembly is a flipping table. The first detachable structure includes a first socket integrated on the flipping table and a connector connected to the first positioning member through the first socket. Specifically, the connector is a first pin. When replacing, the first pin can be removed to separate the first positioning member from the flipping table.

[0009] The second positioning component is a positioning fixture, which has a mounting groove for the battery cell to be fixed. The positioning fixture is fixed on the output end of the linear moving mechanism. Under the action of the linear moving mechanism, the battery cell moves towards the first positioning component.

[0010] The output end of the linear moving structure is a slider. The second detachable structure includes a second socket integrated on the positioning fixture and a second pin that passes through the second socket and is connected to the slider. The replacement method is to remove the second pin so that the positioning fixture is separated from the slider.

[0011] The first positioning component is a positioning plate that is recessed towards the middle. The positioning plate is driven by two methods: the flipping component and the positioning fixture is driven by the linear moving mechanism. This choice is made based on the premise that both need to be replaced. In other words, it is more convenient to disassemble the positioning plate and the positioning fixture by distributing them in different longitudinal positions. At the same time, the positioning plate will not occupy the longitudinal space above the battery cell under the action of the flipping component, and the laser beam can directly enter the current collector on the end of the battery cell with the simplest light path.

[0012] The flipping assembly includes a transmission mechanism and a flipping cylinder. The flipping cylinder is connected to the flipping table through the transmission mechanism. The positioning plate is set on the flipping table. The positioning plate and the flipping table are provided with welding ports that run through their upper and lower surfaces. At the same time, the surface of the positioning plate is provided with an adsorption port for adsorbing the current collector on the surface of the positioning plate. After the flipping table is flipped, the bottom surface of the flipping table faces upward, and the welding port on the bottom surface corresponds to the laser beam. The laser passes through the welding port and welds the current collector attached to the end of the battery cell.

[0013] The aforementioned adsorption port uses negative pressure adsorption. The flipping table is fixed on the flipping shaft. At the same time, the flipping table and the flipping shaft are equipped with interconnected negative pressure channels. The negative pressure channels are also connected to the adsorption port on the positioning plate and to the output end of the negative pressure device outside the flipping shaft. Using negative pressure adsorption does not affect the contact between the current collector and the battery cell, ensuring the consistency of the current collector on the battery cell.

[0014] Another advantage of using a flip cylinder is that the power provided by the flip cylinder can press the collector plate firmly onto the battery cell without any gaps.

[0015] The device body includes a support plate, and a linear moving mechanism is set on the support plate. The support plate has a mounting base near the tilting shaft, and a stop switch is provided on the mounting base. A stop plate is provided on the tilting table. After the tilting shaft rotates to a certain extent, the stop plate will press against the stop switch. The stop switch sends a control signal to the host computer, and the host computer controls the tilting cylinder to stop working.

[0016] The transmission mechanism includes a driving rack and a driven gear. The driven gear is sleeved on the tilting shaft, and the driving rack is connected to the output end of the tilting cylinder. The driving rack meshes with the driven gear. The rack and pinion drive method has the characteristics of high precision and can accurately control the specific number of rotations of the tilting shaft. Attached Figure Description

[0017] Figure 1 This is a perspective view of the present invention.

[0018] Figure 2 yes Figure 1 Enlarged diagram of point A.

[0019] Figure 3 It is a 3D view of the rotating platform.

[0020] Figure 4 It is a three-dimensional drawing of the positioning fixture.

[0021] Figure 5 This is a 3D view of the positioning device.

[0022] Figure 6 This is a three-dimensional view of the positioning device from another perspective.

[0023] Figure 7 yes Figure 6 Enlarged diagram of point B. Detailed Implementation

[0024] like Figure 1-7 As shown, a laser welding machine includes a body 1, a laser welding head 2 on the body 1, and a positioning device. The positioning device includes the device body 1 and a first positioning member 3 and a second positioning member 4 connected to the device body 1 by a detachable structure. The first positioning member 3 and the second positioning member 4 fix the battery cell 5 and the current collector plate, respectively.

[0025] The beneficial effects of this utility model are:

[0026] This utility model adds a new detachable structure to achieve the purpose of replacing the positioning component. The positioning component serves as a fixture for positioning the battery cell 5 and the current collector. After changing to different models, it can fit other specifications of battery cell 5 and current collector, thus solving the basic fit problem and enabling welding between different models of battery cell 5 and current collector, and successfully welding different models of current collector and battery cell 5.

[0027] The aforementioned detachable structure includes a first detachable structure and a second detachable structure. The device body 1 also includes a flipping assembly 6. The output end of the flipping assembly 6 is a flipping table 61. The first detachable structure includes a first socket 62 integrated on the flipping table 61 and a connector connected to the first positioning member 3 through the first socket 62. Specifically, the connector is a first pin. When replacing, the first pin is removed, and the first positioning member 3 can be separated from the flipping table 61.

[0028] The second positioning component 4 is a positioning fixture. The positioning fixture is provided with a mounting groove 41 for the battery cell 5 to fix the battery cell 5. The positioning fixture is fixed on the output end of the linear moving mechanism 7. Under the action of the linear moving mechanism 7, the battery cell 5 moves towards the first positioning component 3.

[0029] The output end of the linear moving structure is a slider. The second detachable structure includes a second socket 42 integrated on the positioning fixture and a second pin that passes through the second socket 42 and is connected to the slider. The replacement method is to remove the second pin so that the positioning fixture is separated from the slider.

[0030] The first positioning component 3 is a positioning plate that is recessed towards the middle. The positioning plate is driven by the flipping component 6 and the positioning fixture is driven by the linear moving mechanism 7. The choice is made based on the premise that both need to be replaced. In other words, it is more convenient to disassemble the positioning plate and the positioning fixture by distributing them in different longitudinal positions. At the same time, the positioning plate will not occupy the longitudinal space above the battery cell 5 under the action of the flipping component 6, so the laser beam can directly enter the current collector on the end of the battery cell 5 with the simplest light path.

[0031] The flipping assembly 6 includes a flipping table 61, a transmission mechanism, and a flipping cylinder 63. The flipping cylinder 63 is connected to the flipping table 61 through the transmission mechanism. A positioning plate is set on the flipping table 61. The positioning plate and the flipping table 61 are provided with welding ports 64 that penetrate through their upper and lower surfaces. At the same time, the surface of the flipping table 61 is provided with an adsorption port 65 for adsorbing the current collector on the surface of the flipping table 61. After the flipping table 61 is flipped, the bottom surface of the flipping table 61 faces upward, and the welding port 64 on the bottom surface corresponds to the laser beam. The laser passes through the welding port 64 and welds the current collector attached to the end of the battery cell 5.

[0032] The aforementioned adsorption port 65 is a negative pressure adsorption. The flipping table 61 is fixed on the flipping shaft 66. At the same time, the flipping table 61 and the flipping shaft 66 are provided with interconnected negative pressure channels. The negative pressure channels are also connected to the adsorption port 65 on the positioning plate, and the negative pressure channels are connected to the output end of the negative pressure device outside the flipping shaft 66. Using negative pressure adsorption can not affect the contact between the current collector and the battery cell 5, ensuring the consistency of the current collector on the battery cell 5.

[0033] Another advantage of using the flipping mechanism is that the power provided by the flipping cylinder 63 can press the collector plate firmly onto the cell 5 without any gaps.

[0034] The device body 1 includes a support plate 100, and a linear moving mechanism 7 is mounted on the support plate 100. The support plate 100 has a mounting base 101 near the flipping shaft 66. The mounting base 101 is equipped with a stop switch 102, and the flipping table 61 is equipped with a stop plate 67. After the flipping shaft 66 rotates to a certain extent, the stop plate 67 will press against the stop switch 102. The stop switch 102 sends a control signal to the host computer, and the host computer controls the flipping cylinder 63 to stop working.

[0035] The transmission mechanism includes a driving rack 68 and a driven gear 69. The driven gear 69 is sleeved on the flip shaft 66. The driving rack 68 is connected to the output end of the flip cylinder 63, and the driving rack 68 meshes with the driven gear 69. The rack and pinion drive method has the characteristics of high precision and can accurately control the specific number of rotations of the flip shaft 66.

[0036] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A laser welding machine comprising a body, on which a laser welding head is arranged, characterized in that, The positioning device comprises a device body and first and second positioning members connected to the device body through detachable structures, the first and second positioning members respectively fixing the battery cell and the current collecting disc; the detachable structures comprise first and second detachable structures; the device body further comprises a turnover assembly, the output end of the turnover assembly being a turnover table, the first detachable structure comprising a first socket integrated on the turnover table and a connecting member connected to the first positioning member through the first socket; the turnover assembly comprises a transmission mechanism and a turnover cylinder, the turnover cylinder being connected to the turnover table through the transmission mechanism, a positioning plate being arranged on the turnover table, the positioning plate and the turnover table being provided with welding ports penetrating therethrough, and the positioning plate being provided with suction ports on the surface thereof for suction of the current collecting disc on the surface of the positioning plate, the bottom surface of the turnover table being upward after the turnover table is turned over, and the welding ports on the bottom surface corresponding to the laser beam.

2. A laser welding machine according to claim 1, characterised in that The linear movement mechanism is further provided, and the second positioning member is a positioning jig provided with an installation groove matched with the battery cell, the positioning jig being fixed to the output end of the linear movement mechanism.

3. A laser welding machine according to claim 2, wherein, The output end of the linear movement structure is a sliding block, and the second detachable structure comprises a second socket integrated on the positioning jig and a second pin shaft penetrating through the second socket and connected to the sliding block.

4. The laser welder of claim 1, wherein, The first positioning member is a positioning plate recessed toward the middle portion.

5. The laser welder of claim 1, wherein, The turnover shaft is further provided, the turnover table being fixed to the turnover shaft, the turnover table and the turnover shaft being provided with negative pressure flow channels in communication with each other, the negative pressure flow channels further communicating with the suction ports on the positioning plate, and the negative pressure flow channels being connected to the output end of a negative pressure device outside the turnover shaft.

6. A laser beam welding machine according to claim 5, characterized in that The device body is provided with a support plate, the linear movement mechanism being arranged on the support plate, the support plate being provided with a mounting base close to the turnover shaft, the mounting base being provided with a stop switch, and the turnover table being provided with a stop plate.

7. A laser beam welding machine according to claim 6, characterized in that The transmission mechanism comprises a driving rack and a driven gear, the driven gear being sleeved on the turnover shaft, the driving rack being connected to the output end of the turnover cylinder, and the driving rack being engaged with the driven gear.

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