Battery cell welding equipment and battery cell welding method

Abstract

The invention discloses battery cell welding equipment and a battery cell welding method. The battery cell welding equipment comprises a base and a transfer mechanism, wherein the transfer mechanism is mounted on the base; the first welding unit is installed on the base and located on one side of the transfer mechanism, the first welding unit comprises a first carrying mechanism and a first welding mechanism, and the first welding mechanism is firstly used for photographing and detecting one end face of the battery cell and then used for welding one end face of the battery cell; and the second welding unit is installed on the base and located on the other side of the transfer mechanism, the second welding unit comprises a second carrying mechanism and a second welding mechanism, and the second welding mechanism is used for conducting photographing detection on the other end face of the battery cell and then used for welding the other end face of the battery cell. The first welding mechanism and the second welding mechanism are used for photographing and detecting the two end faces of the battery cell correspondingly and then welding the battery cell, the welding quality of the two end faces of the battery cell is improved, and the machining efficiency of the battery cell is improved.

Description

Technical Field

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

[0002] In response to the national "dual carbon" goal, automobiles have entered the new energy track, replacing engines with motors and fossil fuels with batteries. The power batteries of new energy vehicles are now composed of many battery cells, and the processing technology of battery cells is complicated. Especially when welding battery cells, in order to achieve the compaction and precise positioning of the battery cells and improve the efficiency and quality of welding, it is necessary to ensure that the welding area of ​​the battery shell is fixed and clamped for welding, select appropriate parameters, ensure that the weld is flat and smooth, without welding holes, explosions, leakage and other poor welding, and no burning of the pole insulation parts.

[0003] In the related technology, the CCD detector of the pre-welding CCD (Charge coupled Device) detection component and the welding head of the welding module move asynchronously. Due to mechanical positioning or cumulative errors of the motor encoder, welding trajectory deviation problems will occur, resulting in poor welding quality. In addition, the battery cell processing efficiency is low and the degree of automation is not high, requiring production personnel to frequently load and unload materials. Summary of the invention

[0004] 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 core welding device, wherein a first welding mechanism and a second welding mechanism respectively take photos of two end surfaces of the battery core for inspection before welding, thereby improving the welding quality of the battery core.

[0005] The invention also provides a battery core welding method.

[0006] According to the first aspect of the present invention, the battery cell welding equipment includes: a base, a transfer mechanism, the transfer mechanism is installed on the base; a first welding unit, the first welding unit is installed on the base and located on one side of the transfer mechanism, the first welding unit includes: a first conveying mechanism and a first welding mechanism, the first conveying mechanism is used to convey the battery cell from the first welding mechanism to the transfer mechanism, the first welding mechanism is first used to photograph and detect one end face of the battery cell and then to weld the one end face of the battery cell; a second welding unit, the second welding unit is installed on the base and located on the other side of the transfer mechanism, the second welding unit includes: a second conveying mechanism and a second welding mechanism, the second conveying mechanism is used to convey the battery cell from the transfer mechanism to the second welding mechanism, the second welding mechanism is first used to photograph and detect the other end face of the battery cell and then to weld the other end face of the battery cell.

[0007] According to the battery cell welding equipment of the embodiment of the present invention, the first welding mechanism and the second welding mechanism respectively take photos of the two end faces of the battery cell for inspection before welding, thereby improving the welding quality of the two end faces of the battery cell.

[0008] According to some embodiments of the present invention, the first welding mechanism and the second welding mechanism both include: a welding assembly and a camera assembly, the welding assembly can move in a horizontal direction, the camera assembly is fixed on the welding assembly, and the camera assembly moves synchronously with the welding assembly.

[0009] According to some embodiments of the present invention, the first welding unit includes: a loading mechanism, the loading mechanism is used to load the battery cell, and the first transporting mechanism is used to transport the battery cell from the loading mechanism to the first welding mechanism.

[0010] According to some embodiments of the present invention, the loading mechanism includes: at least four first columns and a plurality of first jaws, the plurality of jaws are respectively connected to at least four first columns, the plurality of first jaws are arranged in multiple layers along the height direction, and the first jaws in any layer are provided with at least four first jaws and are used to place the battery cells, so that the loading mechanism can place a plurality of the battery cells.

[0011] According to the battery core welding equipment of the embodiment of the present invention, the multiple layers of the first clamping jaws can place multiple battery cores, thereby improving the coordination efficiency between the feeding mechanism and the first transport mechanism, thereby improving the feeding efficiency.

[0012] According to some embodiments of the present invention, the second welding unit includes: a material unloading mechanism, the material unloading mechanism is used to unload the battery cells, and the second transporting mechanism is used to transport the battery cells from the second welding mechanism to the material unloading mechanism.

[0013] According to some embodiments of the present invention, the unloading mechanism includes: at least four second columns and a plurality of second jaws, the plurality of jaws are respectively connected to at least four second columns, the plurality of jaws are arranged in multiple layers along the height direction, and the plurality of jaws in any layer are provided with at least four second jaws and are used for placing battery cells, so that the unloading mechanism can place a plurality of the battery cells.

[0014] According to the battery core welding equipment of the embodiment of the present invention, the multi-layer second clamping jaws can place multiple battery cores, thereby improving the coordination efficiency between the unloading mechanism and the second transport mechanism, thereby improving the unloading efficiency.

[0015] According to some embodiments of the present invention, the transfer mechanism includes: a support frame, a flexible member and a limit member, the support frame has a support surface for supporting the battery cell, the support surface is provided with a flexible member, the limit member is connected to the support frame and defines a accommodating space, and the accommodating space is used to accommodate the battery cell.

[0016] According to some embodiments of the present invention, the first welding unit includes: a first clamping mechanism, which cooperates with the first welding mechanism to clamp the battery core and rotate the battery core to weld one end surface of the battery core.

[0017] According to some embodiments of the present invention, the second welding unit includes: a second clamping mechanism, which cooperates with the second welding mechanism to clamp the battery cell and rotate the battery cell to weld the other end surface of the battery cell.

[0018] According to some embodiments of the present invention, the first clamping mechanism and the second clamping mechanism both include: a mounting base, a rotating platform and a clamping assembly, the rotating platform is hollow and rotatably connected to the mounting base; the clamping assembly is arranged on the rotating platform, and the clamping assembly includes: a front clamping assembly and a first side clamping assembly, the front clamping assembly is used to clamp the two top surfaces of the welding end of the battery cell, and the first side clamping assembly is used to clamp the two side surfaces of the welding end of the battery cell.

[0019] According to some embodiments of the present invention, the first welding unit includes: a first feeding mechanism, which is used to cooperate with the first conveying mechanism to enable the battery cell to reach a first welding position for welding one end face; the second welding unit includes: a second feeding mechanism, which is used to cooperate with the second conveying mechanism to enable the battery cell to reach a second welding position for welding another end face.

[0020] According to some embodiments of the present invention, the first feeding mechanism and the second feeding mechanism both include: a feeding platform and a limiting assembly, the feeding platform is used to support the battery cell and feed the battery cell to the first welding position or the second welding position, and the limiting assembly is connected to the feeding platform to limit the battery cell.

[0021] According to the battery cell welding method of the second aspect of the embodiment of the present invention, the battery cell welding equipment is used to weld the battery cell, and the battery cell welding method includes the following steps: a first conveying mechanism clamps the battery cell from the loading mechanism and sends it to the first welding position; the camera component of the first welding mechanism takes a photo to detect one end face of the battery cell, and adjusts the position of the welding component of the first welding mechanism according to the photo detection result; the welding component of the first welding mechanism welds one end face of the battery cell; the first conveying mechanism sends the battery cell to the transfer mechanism, and the second conveying mechanism clamps the battery cell from the transfer mechanism and sends it to the second welding position; the camera component of the second welding mechanism takes a photo to detect the other end face of the battery cell, and adjusts the position of the welding component of the second welding mechanism according to the photo detection result; the welding component of the second welding mechanism welds the other end face of the battery cell; the second conveying mechanism sends the welded battery cell to the unloading mechanism.

[0022] According to some embodiments of the present invention, the step of taking a photo and detecting one end face of the battery cell by the camera assembly of the first welding mechanism, and adjusting the position of the welding assembly of the first welding mechanism according to the photo detection result, and the step of taking a photo and detecting another end face of the battery cell by the camera assembly of the second welding mechanism, and adjusting the position of the welding assembly of the second welding mechanism according to the photo detection result both include: selecting an illumination light source and a focal length of the camera assembly; adjusting camera parameters of the camera assembly according to the site environment; acquiring an image acquired by the camera assembly, and acquiring an actual position according to the image; acquiring a reference position, comparing the actual position with the reference position, and obtaining compensation parameters; and adjusting the first welding mechanism to a first welding position to weld one end face of the battery cell, or adjusting the second welding mechanism to a second welding position to weld the other end face of the battery cell according to the compensation parameters.

[0023] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1 is a schematic structural diagram of a direction of an electric core welding device according to an embodiment of the first aspect of the present invention; Figure 2 is a structural schematic diagram of another direction of the electric core welding device according to the embodiment of the first aspect of the present invention; Figure 3 The process of the battery core welding method according to the second embodiment of the present invention is Figure 1 ; Figure 4The process of the battery core welding method according to the second embodiment of the present invention is Figure 2 ; Figure 5 The process of the battery core welding method according to the second embodiment of the present invention is Figure 3 .

[0025] Reference numerals: 100. Battery core welding equipment; 10. Base; 11. Transfer mechanism; 20. First welding unit; 21. First transport mechanism; 22. First welding mechanism; 23. Loading mechanism; 24. First clamping mechanism; 30. Second welding unit; 31. Second transport mechanism; 32. Second welding mechanism; 33. Unloading mechanism; 34. Second clamping mechanism. DETAILED DESCRIPTION

[0026] Embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Embodiments of the present invention are described in detail below.

[0027] Reference below Figure 1-Figure 5 The electric core welding device 100 according to the embodiment of the present invention is described, and an electric core welding method used for the electric core welding device 100 is also proposed.

[0028] Combination Figure 1-Figure 2 As shown, the battery core welding equipment 100 includes: a base 10, a transfer mechanism 11, a first welding unit 20 and a second welding unit 30. The transfer mechanism 11, the first welding unit 20 and the second welding unit 30 are all arranged on the base 10. The transfer mechanism 11 is located between the first welding unit 20 and the second welding unit 30. The first welding unit 20 is used to weld one end face of the battery core. After the first welding unit 20 completes welding one end face of the battery core, the battery core is placed in the transfer mechanism 11. The second welding unit 30 takes material from the transfer mechanism 11, and the second welding unit 30 welds the other end face of the battery core.

[0029] The first welding unit 20 is located on one side of the transfer mechanism 11, and the first welding unit 20 includes: a first conveying mechanism 21 and a first welding mechanism 22. The first conveying mechanism 21 is used to convey the battery cell from the first welding mechanism 22 to the transfer mechanism 11, and the first welding mechanism 22 is first used to photograph and detect one end face of the battery cell and then to weld one end face of the battery cell.

[0030] Before welding, the first welding mechanism 22 takes a photo of the welding edge of one end face of the battery cell. After the photo inspection, the first welding mechanism 22 welds the four welding edges of one end face of the battery cell to ensure the accuracy of the welding trajectory. The first welding mechanism 22 is provided with a structure for taking photos to ensure the welding quality.

[0031] After the first welding mechanism 22 completes welding one end surface of the battery cell, the first transport mechanism 21 transports the battery cell to the transfer mechanism 11 .

[0032] The second welding unit 30 is located on the other side of the transfer mechanism 11, and the second welding unit 30 includes: a second transport mechanism 31 and a second welding mechanism 32. The second transport mechanism 31 is used to transport the battery cell from the transfer mechanism 11 to the second welding mechanism 32. The second welding mechanism 32 is first used to take pictures and detect the other end face of the battery cell and then used to weld the other end face of the battery cell.

[0033] After the second transporting mechanism 31 picks up the material from the transfer mechanism 11 and transports the battery cell to the second welding mechanism 32, the second welding mechanism 32 first takes a photo of the welding edge of the other end face of the battery cell. After the photo inspection, the first welding mechanism 22 welds the four welding edges of the other end face of the battery cell to ensure the accuracy of the welding trajectory. The first welding mechanism 22 is provided with a structure for taking photos to ensure the welding quality.

[0034] Therefore, the first welding mechanism 22 and the second welding mechanism 32 respectively take photos and inspect the two end surfaces of the battery cell before welding, thereby improving the welding quality of the two end surfaces of the battery cell.

[0035] In some embodiments, the first welding mechanism 22 and the second welding mechanism 32 both include: a welding assembly and a camera assembly, the welding assembly can move in the horizontal direction, the camera assembly is fixed on the welding assembly, and the camera assembly moves synchronously with the welding assembly. Specifically, the first welding mechanism 22 is provided with a welding assembly and a camera assembly, after the first transporting mechanism 21 takes the material, after the battery cell is transported to the first welding mechanism 22, the camera assembly takes a photo of the welding edge of one end face of the battery cell for detection, and the welding assembly welds the welding edge of the battery cell according to the information of the welding position obtained by the camera assembly until the welding of one end face of the battery cell is completed. The camera assembly moves synchronously with the welding assembly to reduce the error caused by calculation, improve the accuracy of welding, and improve the welding quality.

[0036] Specifically, the second welding mechanism 32 is provided with a welding assembly and a camera assembly. After the second transport mechanism 31 takes the material and transports the battery cell to the second welding mechanism 32, the camera assembly takes a photo of the welding edge of the other end face of the battery cell for inspection. The welding assembly welds the welding edge of the battery cell according to the welding position information obtained by the camera assembly until the welding of the other end face of the battery cell is completed. The camera assembly moves synchronously with the welding assembly to reduce the error caused by calculation, improve the accuracy of welding, and enhance the welding quality.

[0037] During the movement of the first welding mechanism 22 and the second welding mechanism 32 , the camera assembly and the welding assembly move synchronously, the system stability is high, the welding track deviation problem caused by mechanical positioning or motor encoder cumulative error is reduced, and the welding quality of the battery core welding equipment 100 is improved.

[0038] like Figure 1 and Figure 2 As shown, the first welding unit 20 includes: a loading mechanism 23, the loading mechanism 23 is used to load the battery cell, and the first transport mechanism 21 is used to transport the battery cell from the loading mechanism 23 to the first welding mechanism 22. After the first transport mechanism 21 clamps the battery cell from the loading mechanism 23, it transports the battery cell to the first welding mechanism 22 to weld one end surface of the battery cell.

[0039] Further, the loading mechanism 23 includes: at least four first columns and a plurality of first clamps, the plurality of first clamps are respectively connected to the at least four first columns, the plurality of first clamps are arranged in multiple layers along the height direction, and at least four first clamps are arranged in any layer and used to clamp the battery cells, so that the loading mechanism 23 can clamp multiple battery cells. Specifically, the loading mechanism 23 is connected to the base 10, the spacing between the at least four first columns is selected according to the length of different battery cell models, the height of the first column can be selected according to the thickness of different battery cell models, the plurality of first clamps are fixed on the first columns, the plurality of first clamps on any one of the first columns are arranged at intervals along the height direction, and the plurality of first clamps on at least four first columns are arranged in multiple layers, the second clamps on any layer include at least four second clamps, and the second clamps on any layer can be used to place the battery cells, so that the loading mechanism 23 can place multiple battery cells, improve the coordination efficiency between the loading mechanism 23 and the first transport mechanism 21, and improve the processing efficiency.

[0040] Specifically, in one embodiment of the present invention, there may be four first columns, and eight first clamps may be arranged at intervals on any first column, so that the loading mechanism 23 can place eight battery cells, ensuring the coordination efficiency between the loading mechanism 23 and the first transport mechanism 21 to improve the processing efficiency.

[0041] The second welding unit 30 includes a material unloading mechanism 33 for unloading cells, and a second transport mechanism 31 for transporting cells from the second welding mechanism 32 to the material unloading mechanism 33. The second transport mechanism 31 can transport cells welded by the second welding mechanism 32 to the material unloading mechanism 33.

[0042] Furthermore, the unloading mechanism 33 includes: at least four second columns and a plurality of second clamps, the plurality of second clamps are respectively connected to the at least four second columns, the plurality of second clamps are arranged in multiple layers along the height direction, and at least four second clamps are arranged in any layer and used to clamp the battery cells, so that the unloading mechanism 33 can place multiple battery cells. Specifically, the unloading mechanism 33 is connected to the base 10, the spacing between the at least four second columns is selected according to the length of different battery cell models, the height of the second column can be selected according to the thickness of different battery cell models, the plurality of second clamps are fixed on the second columns, and the plurality of second clamps on any second column are arranged at intervals along the height direction, and the plurality of second clamps on at least four second columns are arranged in multiple layers, so that the unloading mechanism 33 can place multiple battery cells, improve the coordination efficiency between the unloading mechanism 33 and the second transport mechanism 31, and improve the processing efficiency.

[0043] Specifically, in one embodiment of the present invention, there may be four second columns, and eight second clamps may be arranged at intervals on any second column, so that the unloading mechanism 33 can place eight battery cells, ensuring the coordination efficiency between the unloading mechanism 33 and the second transport mechanism 31 to improve processing efficiency.

[0044] The transfer mechanism 11 includes: a support frame, a flexible member and a limit member. The support frame has a support surface for supporting the battery cell, and a flexible member is arranged on the support surface. The limit member is connected to the support frame and defines a storage space, and the storage space is used to accommodate the battery cell. In other words, the support frame is fixed by angle irons through bolts to ensure the structural stability of the support frame. The flexible member covers the upper surface of the support frame. When the battery cell is placed on the transfer mechanism 11, the flexible member can reduce shock and prevent damage to the battery cell, and prevent the aluminum shell surface of the battery cell from being scratched. The limit member is arranged on the support frame, and the limit member can define the placement position of the battery cell and determine the preset transfer position of the battery cell on the transfer mechanism 11.

[0045] Among them, the flexible part can be silicone, or it can be rubber, latex, ACF metamaterial, polyurethane foam, EVA material, etc.

[0046] like Figure 1 and Figure 2As shown, the first welding unit 20 includes: a first clamping mechanism 24, which cooperates with the first welding mechanism 22 to clamp the battery cell and rotate the battery cell to weld one end face of the battery cell. Specifically, the first clamping mechanism 24 can clamp the battery cell and clamp and fix the battery cell from the feeding end to facilitate the first welding mechanism 22 to weld one end face of the battery cell. The first clamping mechanism 24 can also rotate the battery cell to adjust the welding position of the battery cell to weld four welding edges of one end face of the battery cell.

[0047] The second welding unit 30 includes: a second clamping mechanism 34, which cooperates with the second welding mechanism 32 to clamp the battery cell and rotate the battery cell to weld the other end face of the battery cell. Specifically, the second clamping mechanism 34 can clamp the battery cell and clamp and fix the battery cell from the feeding end to facilitate the second welding mechanism 32 to weld the other end face of the battery cell. The second clamping mechanism 34 can also rotate the battery cell to adjust the welding position of the battery cell to weld the four welding edges of the other end face of the battery cell.

[0048] Furthermore, the first clamping mechanism 24 and the second clamping mechanism 34 both include: a mounting base, a rotating platform and a clamping assembly, wherein the rotating platform is hollow and rotatably connected to the mounting base. The rotating platform is rotatably connected to the mounting base, the rotating platform is hollow, and the clamping assembly is arranged on the rotating platform so that the battery cell enters the center of the rotating platform and remains stable under the clamping of the clamping assembly, so as to facilitate the first welding mechanism 22 and the second welding mechanism 32 to weld the battery cell; the rotating platform is electrically connected to the rotating motor, and the rotating platform rotates under the drive of the rotating motor, so as to facilitate the welding of the four sides of the end face of the battery cell.

[0049] The clamping assembly includes: a front clamping assembly and a first side clamping assembly, the front clamping assembly is used to clamp the two top surfaces of the welding end of the battery core, and the first side clamping assembly is used to clamp the two side surfaces of the welding end of the battery core.

[0050] The front clamping assembly includes: a front positioning block, a front clamping block and a front clamping cylinder. The front clamping cylinder is transmission-connected to the front clamping block and is used to drive the front clamping block to move so as to clamp the two front sides of the battery cell with the front positioning block.

[0051] The first side clamping assembly includes: a first side positioning block, a first side clamping block and a first side clamping cylinder. The first side clamping cylinder is transmission-connected to the first side clamping block and is used to drive the first side clamping block to move so as to clamp the two sides of the welding end of the battery cell with the first side positioning block.

[0052] The first clamping mechanism 24 and the second clamping mechanism 34 both include: a first end face mating assembly, the first end face mating assembly includes: a first end face clamping block and a first end face opening clamping cylinder, the first end face opening clamping cylinder is transmission-connected to the first end face clamping block, and is used to drive the first end face clamping block to move so that the first end face clamping block abuts against the end face of the welding end of the battery cell.

[0053] According to some embodiments of the present invention, the first welding unit 20 includes: a first feeding mechanism, which is used to cooperate with the first transporting mechanism 21 to enable the battery cell to reach the first welding position. After the first transporting mechanism 21 takes the material from the loading mechanism 23, it transports the battery cell to the first feeding mechanism, and the first feeding mechanism transports the battery cell to the first clamping mechanism 24. The first feeding mechanism cooperates with the first clamping mechanism 24 to enable the battery cell to reach the first welding position. After the camera assembly of the first welding mechanism 22 takes a picture of the battery cell, the welding assembly welds the end face of the battery cell.

[0054] The second welding unit 30 includes: a second feeding mechanism, which is used to cooperate with the second transport mechanism 31 to make the battery cell reach the second welding position. After the second transport mechanism 31 takes the material from the loading mechanism 23, it transports the battery cell to the second feeding mechanism, and the second feeding mechanism transports the battery cell to the second clamping mechanism 34. The second feeding mechanism cooperates with the second clamping mechanism 34 to make the battery cell reach the second welding position. After the camera assembly of the second welding mechanism 32 takes a picture of the battery cell, the welding assembly welds the end face of the battery cell.

[0055] The first feeding mechanism and the second feeding mechanism both include: a feeding platform and a limiting assembly, and the feeding platform is used to support the battery cell and feed the battery cell to the first welding position or the second welding position.

[0056] The limiting assembly is connected to the feeding platform to limit the position of the battery cell. The limiting assembly includes: a second side clamping assembly and a second end face matching assembly, the second side clamping assembly is arranged on one side of the side of the non-welding end of the battery cell and is used to limit the side of the battery cell; the first end face limiting assembly is arranged on one side of the end face of the non-welding end of the battery cell and is used to limit the end face of the battery cell.

[0057] The second side clamping assembly includes: a second side positioning block, a second side clamping block and a side clamping cylinder. The second side positioning block is fixedly connected to the feeding platform. The second side clamping block and the second side clamping cylinder are transmission connected to the second side clamping block and are used to drive the second side clamping block to move so as to clamp the two top surfaces of the battery cell with the second side positioning block.

[0058] The second end face matching assembly includes: a second end face clamping block and a second end face opening clamping cylinder, the second end face opening clamping cylinder is transmission-connected to the second end face clamping block, and is used to drive the second end face clamping block to move so that the second end face clamping block abuts against the end face of the non-welding end of the battery cell.

[0059] like Figure 3 As shown, according to the battery core welding method of the second embodiment of the present invention, the battery core is welded by using the battery core welding device 100, and the battery core welding method comprises the following steps: S1: The first transport mechanism 21 grabs the battery cell from the loading mechanism 23 and delivers it to the first welding position.

[0060] After the first transport mechanism 21 clamps the battery cell from the loading mechanism 23, it transports the battery cell to the first feeding mechanism, and the first feeding mechanism delivers the battery cell to the first clamping mechanism 24. The clamping assembly of the first clamping mechanism 24 clamps the battery cell to ensure that the battery cell is in the first welding position.

[0061] When the battery cell is in the first welding position, one end surface of the battery cell corresponds to the first welding mechanism 22 , so that the first welding mechanism 22 can weld one end surface of the battery cell.

[0062] S2: The camera assembly of the first welding mechanism 22 takes a photo to detect one end surface of the battery cell, and adjusts the position of the welding assembly of the first welding mechanism 22 according to the photo detection result.

[0063] After the camera assembly of the first welding mechanism 22 takes a picture of one end surface of the battery cell for inspection, the controller drives the welding assembly of the first welding mechanism 22 to move so that the welding assembly is aligned with the welding edge of one end surface of the battery cell.

[0064] S3: The welding assembly of the first welding mechanism 22 welds one end surface of the battery cell.

[0065] The welding components of the first welding mechanism 22 can respectively weld the four short sides of one end surface of the battery cell.

[0066] S4: the first transport mechanism 21 delivers the battery cell to the transfer mechanism 11, and the second transport mechanism 31 grabs the battery cell from the transfer mechanism 11 and delivers it to the second welding position.

[0067] After the second transport mechanism 31 clamps the battery cell from the transfer mechanism 11, it transports the battery cell to the second feeding mechanism, and the second feeding mechanism delivers the battery cell to the second clamping mechanism 34. The clamping assembly of the second clamping mechanism 34 clamps the battery cell to ensure that the battery cell is in the second welding position.

[0068] When the battery cell is in the second welding position, the other end surface of the battery cell corresponds to the second welding mechanism 32 , so that the second welding mechanism 32 can weld the other end surface of the battery cell.

[0069] S5: The camera assembly of the second welding mechanism 32 takes a photo to detect the other end surface of the battery cell, and adjusts the position of the welding assembly of the second welding mechanism 32 according to the photo detection result.

[0070] After the camera assembly of the second welding mechanism 32 takes photos of the other end surface of the battery cell for inspection, the controller drives the welding assembly of the second welding mechanism 32 to move so that the welding assembly is aligned with the welding edge of the other end surface of the battery cell.

[0071] S6: the welding assembly of the second welding mechanism 32 welds the other end surface of the battery cell; the second transport mechanism 31 delivers the welded battery cell to the unloading mechanism 33 .

[0072] The welding assembly of the second welding mechanism 32 can weld the four short sides of the other end surface of the battery cell respectively. After welding is completed, the second transport mechanism 31 delivers the welded battery cell to the unloading mechanism 33, thereby completing the welding of the two end surfaces of one battery cell.

[0073] like Figure 4 As shown, the camera assembly of the first welding mechanism 22 takes a photo to detect one end face of the battery cell, and the steps of adjusting the position of the welding assembly of the first welding mechanism 22 according to the photo detection result include: S201: Select the illumination source and the focal length of the camera assembly. Before determining the camera shooting position, the illumination source and the focal length of the camera assembly need to be selected.

[0074] S202: Adjust camera parameters of the camera component.

[0075] The parameters include: exposure parameter, gain parameter and image brightness.

[0076] S203: Acquire the image acquired by the camera component, and acquire the actual position according to the image.

[0077] By using the size ratio of the image, the pixel points after the image is converted into a digital signal are converted with the actual length size by a proportional coefficient to obtain the actual size, so as to obtain the actual position of the end face of the battery cell.

[0078] S204: Acquire a reference position, compare the actual position with the reference position, and obtain compensation parameters.

[0079] The reference position is information pre-stored in the controller. The controller includes: an image information processing component, which compares the actual position determined by the image collected by the camera with the reference position to obtain a compensation parameter, that is, the difference between the actual position and the reference position.

[0080] S205: adjusting the first welding mechanism 22 to a first welding position according to the compensation parameter, and welding one end surface of the battery cell.

[0081] like Figure 5As shown, the camera assembly of the second welding mechanism 32 takes a photo to detect the other end surface of the battery cell, and the steps of adjusting the position of the welding assembly of the second welding mechanism 32 according to the photo detection result include: S501: Select the illumination source and the focal length of the camera assembly.

[0082] S502: Adjusting camera parameters of the camera assembly according to the on-site environment.

[0083] The parameters include: exposure parameter, gain parameter and image brightness.

[0084] S503: Acquire the image acquired by the camera component, and acquire the actual position according to the image.

[0085] By using the size ratio of the image, the pixel points after the image is converted into a digital signal are converted with the actual length size by a proportional coefficient to obtain the actual size, so as to obtain the actual position of the end face of the battery cell.

[0086] S504: Acquire a reference position, compare the actual position with the reference position, and obtain compensation parameters.

[0087] The reference position is information pre-stored in the controller. The controller includes: an image information processing component, which compares the actual position determined by the image collected by the camera with the reference position to obtain a compensation parameter, that is, the difference between the actual position and the reference position.

[0088] S505: adjusting the second welding mechanism 32 to a second welding position according to the compensation parameter, and welding the other end surface of the battery cell.

[0089] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0090] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0091] Although the 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 present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery core welding device, characterized in that: include: Base (10); A transfer mechanism (11), wherein the transfer mechanism (11) is mounted on the base (10); a first welding unit (20), the first welding unit (20) being mounted on the base (10) and located on one side of the transfer mechanism (11), the first welding unit (20) comprising: a first transport mechanism (21) and a first welding mechanism (22), the first transport mechanism (21) being used to transport the battery cell from the first welding mechanism (22) to the transfer mechanism (11), the first welding mechanism (22) being used to first take a photograph of an end face of the battery cell for inspection and then to weld an end face of the battery cell; A second welding unit (30), the second welding unit (30) is mounted on the base (10) and is located on the other side of the transfer mechanism (11), the second welding unit (30) comprises: a second transport mechanism (31) and a second welding mechanism (32), the second transport mechanism (31) is used to transport the battery cell from the transfer mechanism (11) to the second welding mechanism (32), the second welding mechanism (32) is first used to photograph and detect the other end face of the battery cell and then used to weld the other end face of the battery cell.

2. The electric core welding equipment according to claim 1, characterized in that: The first welding mechanism (22) and the second welding mechanism (32) both comprise: a welding assembly and a camera assembly, the welding assembly being movable in a horizontal direction, the camera assembly being fixed on the welding assembly, and the camera assembly and the welding assembly moving synchronously.

3. The electric core welding equipment according to claim 1, characterized in that: The first welding unit (20) comprises a loading mechanism (23), the loading mechanism (23) being used to load the battery cell, and the first transport mechanism (21) being used to transport the battery cell from the loading mechanism (23) to the first welding mechanism (22).

4. The electric core welding equipment according to claim 3, characterized in that: The loading mechanism (23) comprises: at least four first columns and a plurality of first clamps, the plurality of first clamps are respectively connected to the at least four first columns, the plurality of first clamps are arranged in multiple layers along the height direction, and the first clamps in any layer are provided with at least four first clamps and are used to place the battery cells, so that the loading mechanism (23) can place a plurality of the battery cells.

5. The electric core welding equipment according to claim 1, characterized in that: The second welding unit (30) comprises a material unloading mechanism (33), the material unloading mechanism (33) being used to unload battery cells, and the second transport mechanism (31) being used to transport the battery cells from the second welding mechanism (32) to the material unloading mechanism (33).

6. The electric core welding equipment according to claim 5, characterized in that: The unloading mechanism (33) comprises: at least four second columns and a plurality of second clamps, the plurality of clamps being respectively connected to the at least four second columns, the plurality of second clamps being arranged in multiple layers along the height direction, and any one layer of the second clamps being provided with at least four second clamps and being used for placing battery cells, so that the unloading mechanism (33) can place a plurality of the battery cells.

7. The electric core welding equipment according to any one of claims 1 to 6, characterized in that: The transfer mechanism (11) comprises: a support frame, a flexible member and a limiting member, the support frame having a support surface for supporting the battery cell, the supporting surface being provided with a flexible member, the limiting member being connected to the support frame and defining a receiving space, the receiving space being used to receive the battery cell.

8. The electric core welding equipment according to any one of claims 1 to 6, characterized in that: The first welding unit (20) comprises a first clamping mechanism (24), the first clamping mechanism (24) cooperating with the first welding mechanism (22) and being used to clamp the battery core and rotate the battery core so as to weld an end face of the battery core.

9. The electric core welding equipment according to claim 8, characterized in that: The second welding unit (30) comprises: a second clamping mechanism (34), the second clamping mechanism (34) cooperating with the second welding mechanism and used for clamping the battery core and rotating the battery core to weld the other end face of the battery core.

10. The electric core welding equipment according to claim 9, characterized in that: The first clamping mechanism (24) and the second clamping mechanism (34) both comprise: a mounting base, a rotating platform and a clamping assembly, wherein the rotating platform is hollow and rotatably connected to the mounting base; the clamping assembly is arranged on the rotating platform, and comprises: a front clamping assembly and a first side clamping assembly, wherein the front clamping assembly is used to clamp the two top surfaces of the welding end of the battery cell, and the first side clamping assembly is used to clamp the two side surfaces of the welding end of the battery cell.

11. The electric core welding equipment according to any one of claims 1 to 6, characterized in that: The first welding unit (20) comprises: a first feeding mechanism, the first feeding mechanism being used to cooperate with the first transport mechanism (21) so as to enable the battery cell to reach a first welding position for welding an end face; The second welding unit (30) comprises: a second feeding mechanism, the second feeding mechanism being used to cooperate with the second transport mechanism (31) so as to enable the battery core to reach a second welding position for welding another end face.

12. The electric core welding equipment according to claim 11, characterized in that: The first feeding mechanism and the second feeding mechanism both include: a feeding platform and a limiting assembly, the feeding platform is used to support the battery cell and feed the battery cell to the first welding position or the second welding position, and the limiting assembly is connected to the feeding platform to limit the battery cell.

13. A battery core welding method, characterized in that: A battery cell is welded using the battery cell welding device (100) as claimed in any one of claims 1 to 12, wherein the battery cell welding method comprises the following steps: The first transport mechanism (21) clamps the battery cell from the loading mechanism (23) and transports it to the first welding position; The camera assembly of the first welding mechanism (22) takes a photograph of an end face of the battery cell for detection, and adjusts the position of the welding assembly of the first welding mechanism (22) according to the result of the photograph detection; The welding assembly of the first welding mechanism (22) welds one end surface of the battery cell; The first transport mechanism (21) transports the battery cell to the transfer mechanism (11), and the second transport mechanism clamps the battery cell from the transfer mechanism (11) and transports it to the second welding position; The camera assembly of the second welding mechanism (32) takes a photograph of the other end surface of the battery cell for detection, and adjusts the position of the welding assembly of the second welding mechanism (32) according to the result of the photograph detection; The welding assembly of the second welding mechanism (32) welds the other end surface of the battery core; The second transport mechanism (31) transports the welded battery core to the unloading mechanism (33).

14. The battery core welding method according to claim 13, characterized in that: The camera assembly of the first welding mechanism (22) takes a photograph of one end face of the battery cell for detection, and adjusts the position of the welding assembly of the first welding mechanism (22) according to the photograph detection result, and the camera assembly of the second welding mechanism (32) takes a photograph of another end face of the battery cell for detection, and adjusts the position of the welding assembly of the second welding mechanism (32) according to the photograph detection result, both of which include: Select the illumination source and focal length of the camera assembly; Adjust camera parameters of camera components; Acquire an image acquired by the camera assembly, and acquire an actual position according to the image; Acquire a reference position, compare the actual position with the reference position, and obtain a compensation parameter; According to the compensation parameter, the first welding mechanism (22) is adjusted to a first welding position to weld one end face of the battery cell, or the second welding mechanism (32) is adjusted to a second welding position to weld the other end face of the battery cell.

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