Positioning welding device and assembly line

Abstract

The utility model provides a positioning welding device and an assembly line. The positioning welding device comprises a welding base, a positioning structure and a driving structure. And a positioning structure is arranged on the welding base. And the positioning structure is used for fixing the positions of the tabs and the adapter sheets. The driving structure is connected with the welding base and used for driving the welding base to act and enabling the welding base to have a preset action track. And a plurality of welding points can be arranged between the tabs and the switching sheets. When the welding base acts according to the action track, all the welding points can sequentially pass through the first point position. All the welding points are welded at the first point position, the battery cell does not need to be positioned for multiple times, the position of the battery cell does not need to be manually adjusted, and therefore the welding consistency of the multiple welding points is guaranteed, and the welding quality is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of positioning tooling, in particular to a positioning and welding device and an assembly line. BACKGROUND

[0002] The battery cell includes a positive electrode tab and a negative electrode tab. When two battery cells are welded, the positive electrode tabs of the two battery cells are welded together on one adapter piece, and the negative electrode tabs of the two battery cells are welded together on another adapter piece.

[0003] In related technologies, the battery cell needs to be positioned and released multiple times manually, which results in high operation difficulty and low welding efficiency. In addition, manual adjustment of the position of the battery cell has a certain impact on the consistency of welding, thereby affecting the welding quality. CONTENT OF THE UTILITY MODEL

[0004] The present application provides a positioning and welding device and an assembly line, which enables multiple welding of the battery cell after one positioning, eliminates the need for manual adjustment of the position of the battery cell and the adapter piece, and improves the welding efficiency and welding quality.

[0005] In a first aspect, the present application provides a positioning and welding device for welding a tab and an adapter piece, which includes a welding base, a positioning structure, and a driving structure. The welding base is provided with the positioning structure. The positioning structure is used to fix the position of the tab and the adapter piece. The driving structure is connected with the welding base and is used to drive the welding base to generate an action and make the welding base have a predetermined action track. The tab and the adapter piece can include multiple welding points. When the welding base acts according to the action track, all the welding points can pass through a first point in turn. All the welding points are welded at the first point.

[0006] The positioning and welding device provided by the first aspect can include a welding base, and the positioning structure provided on the welding base is used to fix the tab and the adapter piece. The driving structure connected with the welding base is used to drive the welding base to generate an action and make the welding base have a predetermined action track. When the welding base acts according to the action track, the multiple welding points between the tab and the adapter piece pass through a first point in turn and are welded at the first point. The battery cell does not need to be positioned multiple times, and the position of the battery cell does not need to be adjusted manually, thereby ensuring the consistency of welding of the multiple welding points and improving the welding quality.

[0007] In a possible design, the welding base can include a first face and a second face arranged oppositely. The positioning structure is arranged on the first face, and the driving structure is connected to the second face.

[0008] Based on the above description of the embodiments, the positioning structure and the driving structure are arranged on opposite sides, so that the positioning structure and the driving structure installation space are folded in the thickness direction of the welding base, reducing the volume of the positioning welding device.

[0009] In one possible design, the driving structure can include a first driving structure and a second driving structure. The first driving structure drives the welding base to move along the width direction of the battery cell. The second driving structure drives the welding base to move along the length direction of the battery cell.

[0010] In another possible design, the driving structure can include a first driving structure and a second driving structure. The first driving structure drives the welding base to rotate 180° along a first axis. The second driving structure drives the welding base to move along the length direction of the battery cell. The first surface is centrally symmetric. The first axis is arranged at the center of the first surface, and the first axis is perpendicular to the first surface.

[0011] Based on the above description of the two embodiments, the first driving structure is used to control the welding base to move along the width direction of the battery cell or rotate 180° along the first axis, and the second driving structure is used to control the welding base to move along the length direction of the battery cell, so that the plurality of welding points pass through the first point in turn and are welded at the first point. Without the need to position the battery cell multiple times and manually adjust the position of the battery cell, the consistency of the welding of the plurality of welding points is ensured, and the welding quality is improved.

[0012] In one possible design, a third driving structure is arranged on the welding base. The third driving structure drives the welding base to move along the width direction of the battery cell, and is used to weld the same tab multiple times along the width direction of the battery cell.

[0013] Based on the above description of the embodiments, the third driving structure controls the welding base to move along the width direction of the battery cell, and is used to weld the same tab multiple times along the width direction of the battery cell, thereby increasing the number of welding points between the tab and the adapter piece, ensuring the stability of the connection between the two battery cells, and improving the welding quality of the battery cell.

[0014] In one possible design, the positioning structure can include a first positioning structure and a second positioning structure. The first positioning structure and the second positioning structure are both arranged on the first surface. The first positioning structure is used to position the battery cell. The second positioning structure is used to position the adapter piece 3.

[0015] Based on the above description of the embodiments, the first positioning structure and the second positioning structure are arranged on the first surface and are used to position the battery cell and the adapter piece, respectively, so that the positions of the plurality of welding points are fixed, improving the accuracy of welding, and thereby improving the welding quality of the battery cell.

[0016] In a possible design, the first positioning structure and the second positioning structure are detachably connected on the first surface.

[0017] Based on the above description of the embodiments, the first positioning structure and the second positioning structure are detachably connected on the first surface, so that the positioning and welding device can be used for different models and sizes of the battery cell and the adapter sheet.

[0018] In a possible design, the driving structure is provided with a limiting device for limiting the moving displacement or the rotating degree of the welding base.

[0019] Based on the above description of the embodiments, the limiting device on the driving structure can be used to position a plurality of welding points at the first point and complete the welding of the welding points, the positioning of the welding points is accurate, the accuracy of the welding is improved, and thus the welding quality is ensured.

[0020] In a possible design, the driving structure can further include an adjusting device. The adjusting device is connected with the limiting device and is used to adjust the position of the limiting device, so that the limiting of the limiting device is more accurate.

[0021] Based on the above description of the embodiments, the adjusting device in the driving structure can make the positions of the plurality of welding points more accurate, and thus the welding quality of the battery cell is improved.

[0022] In a second aspect, the application provides an assembly line for assembling a battery, including a welding head, a welding base and the positioning and welding device according to any one of the above embodiments. The welding head and the welding base overlap in the projection direction of the battery thickness. The positioning and welding device is arranged between the welding head and the welding base in the battery thickness direction.

[0023] The assembly line provided in the above second aspect has the beneficial effects of the first aspect and the possible implementation manners of the first aspect, which will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are some embodiments of the application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0025] Figure 1 FIG. 1 is a structural schematic view of a positioning and welding device according to an embodiment of the application.

[0026] Figure 2 FIG. 2 is a view of the positioning and welding device in another direction. Figure 1 FIG. 3 is a view of the positioning and welding device in another direction.

[0027] Figure 3Fig. 1 is a structural schematic diagram of a welding base according to an embodiment of the present application.

[0028] Figure 4 Fig. 2 is a structural schematic diagram of a first positioning structure according to an embodiment of the present application.

[0029] Figure 5 Fig. 3 is a structural schematic diagram of a driving structure according to an embodiment of the present application.

[0030] Legend of reference signs:

[0031] 1 - positioning welding device; 11 - welding base; 111 - first face; 112 - second face; 121 - first positioning structure; 1211 - notch; 122 - second positioning structure; 14 - driving structure; 141 - first driving structure; 142 - second driving structure; 143 - third driving structure; 15 - limiting device; 151 - limiting block; 16 - adjusting device;

[0032] 2 - lug; 3 - adapter plate; 4 - welding head; 5 - welding seat;

[0033] X - first direction; Y - second direction. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings of the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application.

[0036] The terms "comprising" and "having", and any variations thereof, in the present specification and claims and the like, are intended to cover both the case where only the specified features are present and the case where additional features are also present. The word "a" or "an" does not exclude the presence of more than one.

[0037] Reference to "an embodiment" herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily all referring to a common embodiment, or an embodiment that is independent of all other embodiments. One of ordinary skill in the art will recognize that an implementation including "an embodiment" described herein can include one or more elements, and combinations of elements, from all of the embodiments described herein.

[0038] The term "and / or", merely describes association relationship of associated objects, and means that three relationships can exist, for example, A and / or B can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in the present application generally represents an "or" relationship between the front and rear associated objects.

[0039] The orientation words appearing in the following description are the directions shown in the drawings, and are not limited to the specific structure of the application. For example, in the description of the application, the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application.

[0040] In addition, the expressions of the indicating directions for describing the operation and structure of each component of the embodiments, such as X direction, Y direction and Z direction, are not absolute but relative, and although these indications are appropriate when each component is in the position shown in the drawings, these directions should be interpreted differently to correspond to the changes when these positions change.

[0041] In addition, the terms "first", "second", and the like in the specification and claims of the application or the above drawings are used to distinguish different objects, and are not used to describe a particular order, and can explicitly or implicitly include one or more of the features.

[0042] In the description of the application, unless otherwise specified, the meaning of "a plurality of" is two or more (including two), and similarly, "a plurality of groups" means two or more groups (including two groups).

[0043] In the description of the present application, it should be noted that unless specifically stated and limited otherwise, the terms "mounting", "connecting", "connection" should be understood broadly, for example, the "connection" or "connection" of the mechanical structure can mean physical connection, for example, the physical connection can be fixed connection, for example, fixed connection by screws, bolts or other fixing parts; the physical connection can also be detachable connection, for example, mutual clamping or clamping connection; the physical connection can also be integrally connected, for example, welding, bonding or integrally formed connection. The "connection" or "connection" of the circuit structure can mean electrical connection or signal connection in addition to physical connection, for example, it can be direct connection, that is, physical connection, or indirect connection through at least one intermediate element, as long as the circuit is connected, it can also be the connection between the two elements; signal connection can be signal connection through circuit or signal connection through media medium, for example, radio wave. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0044] Batteries are used to provide electrical energy for various electrical devices and applications. For example, power batteries of electric vehicles are usually composed of multiple cells to meet the voltage and capacity requirements of the vehicle.

[0045] Therefore, the assembly steps of the battery can include welding of the cells and the cells.

[0046] Specifically, the cell includes a positive tab and a negative tab. When the two cells are welded, the positive tabs of the two cells are welded together on one adapter tab, and the negative tabs of the two cells are welded together on another adapter tab.

[0047] In the related art, the positive tab and the negative tab of one cell are arranged at the same end of the cell along the length direction of the cell. Moreover, the positive tab and the negative tab are arranged on the end surface of the cell along the width direction of the cell. Therefore, welding the two cells using a welding device includes the following steps:

[0048] Step one: first positioning one of the cells and the adapter tab, so that the positive tab / negative tab of the cell and the adapter tab are aligned with the welding device, facilitating the welding device to complete the first welding.

[0049] Step two: release the first positioning.

[0050] Step three: second positioning the other cell and the adapter tab, so that the positive tab / negative tab of the cell and the adapter tab are aligned with the welding device, facilitating the welding device to complete the second welding.

[0051] Step four: release the second positioning.

[0052] Step 5: Manually move the position of one of the battery cells and perform a third positioning of the battery cell and the adapter plate, so that the negative / positive tab of the battery cell, the adapter plate and the welding device are aligned, so that the welding device can complete the third welding.

[0053] Step Six: Deactivate the third positioning mentioned above.

[0054] Step 7: Manually move the position of another battery cell and perform a fourth positioning of the battery cell and adapter plate to align the negative / positive tabs of the battery cell, the adapter plate, and the welding device, so that the welding device can complete the fourth welding.

[0055] Therefore, it is evident that the relevant technologies require multiple positioning and depositioning of the battery cells, resulting in high operational difficulty and low welding efficiency. Furthermore, the need for manual adjustment of the battery cell position in these technologies affects the consistency of the welding process, thereby impacting the welding quality.

[0056] Based on this, this application provides a positioning welding device and production line. Through the positioning and driving structures, the battery cell can be welded multiple times after a single positioning, eliminating the need for manual adjustment of the battery cell and adapter plate positions, thus improving welding efficiency and welding quality. The following describes... Figures 1-5 Provide a detailed description.

[0057] Firstly, such as Figures 1-3 As shown, this application provides a positioning welding device 1 for welding an electrode tab 2 and an adapter piece 3. The positioning welding device 1 includes a welding base 11, a positioning structure, and a driving structure 14. The positioning structure is provided on the welding base 11. The positioning structure is used to fix the positions of the electrode tab 2 and the adapter piece 3. The driving structure 14 is connected to the welding base 11 and is used to drive the welding base 11 to generate movement and to give the welding base 11 a predetermined movement trajectory. Multiple welding points may be included between the electrode tab 2 and the adapter piece 3. When the welding base 11 moves according to the movement trajectory, all welding points can sequentially pass through a first point. All welding points are welded at the first point.

[0058] Both battery cells may include a positive tab 2 and a negative tab 2. For ease of distinction, the tab 2 in one battery cell will be referred to as the first positive tab 2 and the first negative tab 2, and the tab 2 in the other battery cell will be referred to as the second positive tab 2 and the second negative tab 2. When soldering the two battery cells, the first positive tab 2 and the second positive tab 2 need to be soldered together through the first adapter plate 3, and the first negative tab 2 and the second negative tab 2 need to be soldered together through the second adapter plate 3.

[0059] Combination Figure 1 and Figure 3As can be seen, the two battery cells are placed opposite to each other when being welded, and thus the first positive tab 2 and the second positive tab 2 are welded at different positions on the first adapter tab 3 respectively, and two welding points are formed when being welded. Similarly, the first negative tab 2 and the second negative tab 2 are welded at different positions on the second adapter tab 3 respectively, and two welding points are formed when being welded. Thus, when the two battery cells are welded, there are at least four welding points between the tabs 2 and the adapter tabs 3.

[0060] Since the position of the welding head 4 is fixed, the positions of the above four welding points need to be moved so that the above four welding points correspond to the position of the welding head 4 in turn, so that the welding head 4 can weld the above four welding points in turn. Therefore, a structure is needed to drive the above four welding points to move. The welding head 4 is a common device used for welding on the assembly line, which is generally fixed at a certain position on the assembly line.

[0061] Obviously, the basic condition for the movement of the above four welding points is that the tabs 2 and the adapter tabs 3 move together. Therefore, the positions of the tabs 2 and the adapter tabs 3 need to be relatively fixed first, so that the tabs 2 and the adapter tabs 3 can move together. Based on this, the tabs 2 and the adapter tabs 3 can be fixed on the welding base 11 through a positioning structure, and at this time, driving the welding base 11 can make the tabs 2 and the adapter tabs 3 move together.

[0062] Based on the above, the application can design a driving structure connected with the welding base 11, so that the driving structure drives the welding base 11 to move, thereby realizing the movement of the above four welding points.

[0063] Further, the movement trajectory of the welding base 11 can be preset so that the four welding points can pass through the first point in turn. All the welding points are welded at the first point. Specifically, the position of the first point can be the projection position of the welding head 4 on the welding base 11.

[0064] Based on the above description, the operator can preset the movement trajectory of the welding base 11 to make the welding head 4 weld the four welding points in turn, realize four times of welding of the two battery cells, and does not need to position the battery cells multiple times and manually adjust the position of the battery cells, thereby ensuring the consistency of the four times of welding and improving the welding quality.

[0065] The movement can include linear movement or rotation movement along an axis, which is not limited specifically here. Correspondingly, the movement trajectory can include a linear movement trajectory or a rotation trajectory along an axis, which is not limited specifically here.

[0066] In summary, the positioning welding device 1 provided by the first aspect of the present application can include a welding base 11, a positioning structure arranged on the welding base 11 for fixing the tab 2 and the adapter plate 3. A driving structure connected to the welding base 11 is used to drive the welding base 11 to move and make the welding base 11 have a predetermined movement track. When the welding base 11 moves according to the movement track, the plurality of welding points between the tab 2 and the adapter plate 3 pass through the first point position one by one and are welded at the first point position. Therefore, the plurality of welding points do not need to be positioned multiple times, and the position of the battery does not need to be manually adjusted, thereby ensuring the consistency of the welding of the plurality of welding points and improving the welding quality.

[0067] Further, in some embodiments, as shown in Figure 2 The welding base 11 can include a first face 111 and a second face 112 arranged oppositely. The positioning structure is arranged on the first face 111, and the driving structure 14 is connected to the second face 112.

[0068] Through the description of the above embodiments, the positioning structure and the driving structure 14 are arranged on opposite faces, so that the installation space of the positioning structure and the driving structure 14 is folded in the thickness direction of the welding base 11, thereby reducing the volume of the positioning welding device 1.

[0069] Further, taking the four-time welding of two batteries as an example, the four welding points of the four-time welding can include a first welding point and a second welding point respectively located on the positive tabs 2 of the two batteries, and a third welding point and a fourth welding point respectively located on the negative tabs 2 of the two batteries. In combination with Figure 1 It can be seen that the positive tab 2 and the negative tab 2 of the battery are arranged along a first direction X. The two batteries are arranged along a second direction Y. The first direction X is the width direction of the battery, and the second direction Y is the length direction of the battery. Therefore, it can be seen that the first welding point and the second welding point are arranged along the second direction Y, the first welding point and the third welding point are arranged along the first direction X, the third welding point and the fourth welding point are arranged along the second direction Y, and the second welding point and the fourth welding point are arranged along the first direction X.

[0070] Based on this, the driving structure can include a first driving structure 141 and a second driving structure 142. The first driving structure 141 and the second driving structure 142 operate independently of each other, and the first driving structure 141 and the second driving structure 142 in combination can make the movement track of the welding base 11 include four coordinate points. When the welding base 11 is located at the first coordinate point, the first welding point is located at the first point position, so that the battery completes the first welding through the welding seat 5 and the welding head 4. Similarly, when the welding base 11 is located at the second coordinate point / third coordinate point / fourth coordinate point, the second welding point / third welding point / fourth welding point is located at the first point position, so that the battery completes the second welding / third welding / fourth welding through the welding seat 5 and the welding head 4.

[0071] Specifically, the combination of the first drive structure 141 and the second drive structure 142 can include the following two schemes:

[0072] Option 1: The first driving structure 141 drives the welding base 11 to move along the first direction X. The second driving structure 142 drives the welding base 11 to move along the second direction Y.

[0073] Both the first drive structure 141 and the second drive structure 142 may include a fixed part and an actuating part.

[0074] Specifically, the welding base 11 is connected to the fixed part, which is slidably connected to the moving part. The moving part provides power. This power can be provided by a cylinder or a servo motor. When the cylinder provides power, the displacement generated by the sliding of the fixed part is shorter. When the servo motor provides power, the displacement generated by the sliding of the fixed part is longer.

[0075] Generally, the distance between the positive tab 2 and the negative tab 2 on the same side of the battery cell is greater than the distance between the positive tab 2 and the negative tab 2 of the two battery cells during welding. Therefore, the displacement of the welding base 11 along the first direction X is greater than the displacement of the welding base 11 along the second direction Y. Thus, the first drive structure 141 can be driven by a servo motor, and the second drive structure 142 can be driven by a cylinder, enabling the battery cell to successfully complete four welding operations. It should be noted that the second drive mechanism can also be driven by a servo motor.

[0076] Option 2: The driving structure may include a first driving structure 141 and a second driving structure 142. The first driving structure 141 drives the welding base 11 to rotate 180° along a first axis. The second driving structure 142 drives the welding base 11 to move along a second direction Y. The first surface 111 has a centrally symmetrical shape. The first axis is located at the center of the first surface 111 and is perpendicular to the first surface 111.

[0077] The first driving structure 141 can be a structural block connected to both ends of the welding base 11 along the first direction X. Specifically, the structural block can be block-shaped, strip-shaped, or handle-shaped, etc. Figure 1 As shown, the first drive structure 141 is handle-shaped, which makes it easy for the operator to grip, so that the welding base 11 can rotate smoothly along the first axis.

[0078] The second drive structure 142 may include a fixed part and an actuating part.

[0079] Specifically, the welding base 11 is connected with a fixed part, and the fixed part is slidingly connected on a moving part. The moving part is used to provide power. The power can be provided by a cylinder or a servo motor. When the cylinder provides power, the displacement of the sliding of the fixed part is short. When the servo motor provides power, the displacement of the sliding of the fixed part is long.

[0080] Further, the two battery cells are symmetrically arranged along the first direction X on both sides of the first axis. That is, the positive and negative tabs 2 between the two battery cells are symmetrically arranged along the first direction X on both sides of the first axis.

[0081] At this time, when the first welding point is located at the first point, the welding base 11 is rotated by 180° along the first axis, the positions of the first welding point and the fourth welding point are exchanged, the fourth welding point is moved to the first point and the welding is completed.

[0082] Further, the positive and negative tabs 2 on the same side of the battery cell are symmetrically arranged along the second direction Y on both sides of the first axis.

[0083] At this time, when the first welding point is located at the first point, the welding base 11 moves along the second direction Y, so that the third welding point moves to the first point and the welding is completed. When the fourth welding point is located at the first point, the welding base 11 moves along the second direction Y, so that the second welding point moves to the first point and the welding is completed. Based on this, the first driving structure 141 and the second driving structure 142 can be combined to make the four welding points in the two battery cells successfully complete the welding.

[0084] In summary, the first driving structure 141 is used to control the welding base to move along the first direction X or rotate by 180° along the first axis, and the second driving structure 142 is used to control the welding base to move along the second direction Y, so that the plurality of welding points pass through the first point in turn and are welded at the first point. Without the need to position the battery cell multiple times and manually adjust the position of the battery cell, the consistency of the welding of the plurality of welding points is ensured, and the welding quality is improved.

[0085] Further, in order to further improve the welding quality of the battery cell, the present application also makes the following improvements:

[0086] In some embodiments, as shown in Figure 1 The welding base 11 is provided with a third driving structure 143. The third driving structure 143 drives the welding base 11 to move along the first direction X, and is used to weld the same tab 2 along the first direction X multiple times.

[0087] Among them, the third driving structure 143, for example, when the first welding point is completed, drives the welding base 11 to move along the first direction X, so that the point on one side of the first welding point is located at the first point position, and the welding base 5 and the welding head 4 are welded at the above position.

[0088] Based on the above, it can be seen that there can be two welding points between a tab 2 and an adapter piece 3, which ensures connection stability and improves welding quality.

[0089] Similarly, each of the four tabs 2 on the two cells can have two welding points with the adapter piece 3. In other words, there can be eight welding points between the cells and the adapter piece 3, which further improves the welding quality of the cells.

[0090] The third drive structure 143 may include a fixed part and an actuating part.

[0091] Specifically, the welding base 11 is connected to the fixed part, which is slidably connected to the moving part. The moving part provides power. This power can be provided by a cylinder or a servo motor. When the cylinder provides power, the displacement generated by the sliding of the fixed part is shorter. When the servo motor provides power, the displacement generated by the sliding of the fixed part is longer.

[0092] Furthermore, based on the description of the above embodiments, when the first drive structure 141 is used to control the welding chassis to move along the first direction X, the third drive structure 143 can be combined with the first drive structure 141 into a single drive structure.

[0093] In summary, the third drive structure 143 controls the welding chassis to move along the first direction X, and is used to perform multiple welding on the same tab 2 along the first direction X. This increases the number of welding points between the tab 2 and the adapter piece 3, ensures the stability of the connection between the two cells, and thus improves the welding quality of the cells.

[0094] Furthermore, in some embodiments, such as Figure 3 As shown, the positioning structure may include a first positioning structure 121 and a second positioning structure 122. Both the first positioning structure 121 and the second positioning structure 122 are disposed on the first surface 111. The first positioning structure 121 is used to position the battery cell. The second positioning structure 122 is used to position the adapter piece 3.

[0095] The first positioning structure 121 may include multiple stops for omnidirectional positioning of the battery cell, preventing the battery cell from shifting position, thereby ensuring accurate welding position and improving welding quality.

[0096] Furthermore, such as Figure 4 As shown, a notch 1211 is provided on the side of the stop block away from the welding base 11. This facilitates the placement and removal of the battery cell.

[0097] The second positioning structure 122 can include a plurality of structural blocks for full-directional positioning of the adapter sheet 3 to prevent the position of the adapter sheet 3 from deviating, thereby ensuring accurate welding position and improving welding quality.

[0098] In summary, the first positioning structure 121 and the second positioning structure 122 are arranged on the first surface 111 to position the battery cell and the adapter sheet 3, respectively, so that the positions of the plurality of welding points are fixed, improving the accuracy of welding and thereby improving the welding quality of the battery cell.

[0099] In some embodiments, the first positioning structure 121 and the second positioning structure 122 are detachably connected to the first surface 111.

[0100] The detachable connection can include, but is not limited to, threaded connection, buckle connection, pin connection, key connection, etc.

[0101] The stop blocks in the first positioning structure 121 are detachably connected to the welding base 11, so that the stop blocks can be replaced at different connection positions, and the position and size of the positioning frame composed of a plurality of stop blocks can be changed to adapt to battery cells of different models and sizes, making the positioning and welding device 1 versatile.

[0102] The structural blocks in the second positioning structure 122 are detachably connected to the welding base 11, so that the structural blocks can be replaced at different connection positions, and the position and size of the positioning frame composed of a plurality of structural blocks can be changed to adapt to adapter sheets 3 of different models and sizes, making the positioning and welding device 1 versatile.

[0103] According to the above description of the embodiments, the first positioning structure 121 and the second positioning structure 122 are detachably connected to the first surface 111, so that the positioning and welding device 1 can be used for battery cells and adapter sheets 3 of different models and sizes.

[0104] In some embodiments, as shown in Figure 5 A limiting device 15 is arranged on the driving structure to limit the movement displacement or rotation degree of the welding base 11.

[0105] The first limiting device 15 is arranged on the first driving structure 141.

[0106] When the first driving structure 141 includes a fixed part and a moving part, the first limiting device 15 can include two limiting blocks 151. One of the limiting blocks 151 is arranged on the fixed part, and the other limiting block 151 is arranged on the moving part. The fixed part slides relative to the moving part until the two limiting blocks 151 abut each other, so that the sliding of the fixed part is stopped. As can be seen, the first limiting device 15 can make the action trajectory of the fixed part include a starting position and an ending position.

[0107] Specifically, when the fixed part of the first driving structure 141 is located at the starting position, the first welding point or the third welding point is located at the first point. When the fixed part of the first driving structure 141 is located at the ending position, the second welding point or the fourth welding point is located at the first point.

[0108] When the first driving structure 141 comprises a structure block connected at both ends of the welding base 11 along the first direction X, the first limiting device 15 can be a stopper arranged on the rotating track of the welding base 11. When the welding base 11 rotates to 180°, it abuts against the stopper, so that the welding base 11 stops rotating. Thus, the first limiting device 15 can make the welding base 11 comprise a starting position and an ending position.

[0109] Specifically, when the welding base 11 is located at the starting position, the first welding point or the third welding point is located at the first point. When the welding base 11 is located at the ending position, the fourth welding point or the second welding point is located at the first point.

[0110] The second driving structure 142 is arranged with a second limiting device 15. The second driving structure 142 comprises a fixed part and a moving part. The second limiting device 15 can comprise two limiting blocks 151. One of the limiting blocks 151 is arranged on the fixed part, and the other limiting block 151 is arranged on the moving part. The fixed part slides relative to the moving part until the two limiting blocks 151 abut against each other, so that the fixed part stops sliding. Thus, the second limiting device 15 can make the action track of the fixed part comprise a starting position and an ending position.

[0111] Specifically, when the fixed part of the second driving structure 142 is located at the starting position, the first welding point or the second welding point is located at the first point. When the fixed part of the second driving structure 142 is located at the ending position, the third welding point or the fourth welding point is located at the first point.

[0112] The third driving structure 143 is arranged with a third limiting device 15. The third driving structure 143 comprises a fixed part and a moving part. The third limiting device 15 can comprise two limiting blocks 151. One of the limiting blocks 151 is arranged on the fixed part, and the other limiting block 151 is arranged on the moving part. The fixed part slides relative to the moving part until the two limiting blocks 151 abut against each other, so that the fixed part stops sliding. Thus, the third limiting device 15 can make the action track of the fixed part comprise a starting position and an ending position.

[0113] Specifically, when the fixing part of the third drive structure 143 is in the starting position, the first welding point, the second welding point, the third welding point, or the fourth welding point is located at the first point. When the fixing part of the second drive structure 142 is in the ending position, a point on one side of the first welding point, the second welding point, the third welding point, or the fourth welding point is located at the first point.

[0114] In summary, the limiting device 15 on the drive structure can be used to position multiple welding points at the first point and complete the welding of the welding points. The accurate positioning of the welding points improves the accuracy of welding, thereby ensuring the welding quality.

[0115] Furthermore, in some embodiments, such as Figure 5 As shown, the drive structure may also include an adjustment device 16. The adjustment device 16 is connected to the limiting device 15 and is used to adjust the position of the limiting device 15 so that the limiting device 15 is more accurate.

[0116] When the limiting structure is the limiting block 151 mentioned in the above embodiment, the adjusting device 16 can be a fine-tuning nut that abuts against the limiting block 151 to adjust the position of the limiting block 151, so that the position of the first welding point, the second welding point, the third welding point or the fourth welding point corresponds more accurately with the first point, thereby improving the welding quality of the above welding points.

[0117] According to the description of the above embodiments, the adjustment device 16 in the drive structure can make the position of multiple welding points more accurate, thereby improving the welding quality of the battery cell.

[0118] An assembly line for assembling batteries includes a welding head, a welding seat, and a positioning welding device as described in any of the above embodiments. The projections of the welding head and the welding seat overlap in a first direction, wherein the first direction is the thickness direction of the battery. The positioning welding device is disposed between the welding head and the welding seat along the first direction.

[0119] Those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of this application and form different embodiments. For example, in the claims, any of the claimed embodiments can be used in any combination.

[0120] The above examples are only used to illustrate the technical solutions of the present application, but not to limit the same; although the present application has been described in detail with reference to the foregoing examples, it should be understood by those of ordinary skill in the art that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A positioning and welding device for welding the tab of two battery cells on a tabbing sheet, characterized in that, The application relates to a positioning and welding device for welding tabs of a battery cell. The positioning and welding device comprises a welding base, a positioning structure and a driving structure. The positioning structure is arranged on the welding base. The positioning structure is used for fixing the positions of the tabs and the adapter pieces. The driving structure is connected with the welding base and is used for driving the welding base to generate actions and make the welding base have a predetermined action track. The tabs and the adapter pieces can comprise a plurality of welding points. When the welding base moves according to the action track, all the welding points pass through a first point in turn. All the welding points are welded at the first point.

2. The positioning welding device according to claim 1, characterized in that The welding base can comprise oppositely arranged first and second surfaces. The positioning structure is arranged on the first surface, and the driving structure is connected to the second surface.

3. The positioning welding device according to claim 2, characterized in that The driving structure can comprise first and second driving structures. The first driving structure drives the welding base to move along the width direction of the battery cell. The second driving structure drives the welding base to move along the length direction of the battery cell.

4. The positioning welding apparatus according to claim 2, wherein The driving structure can comprise first and second driving structures. The first driving structure drives the welding base to rotate 180 degrees along a first axis. The second driving structure drives the welding base to move along the length direction of the battery cell. The first surface is a centrally symmetrical shape. The first axis is arranged at the center of the first surface, and the first axis is perpendicular to the first surface.

5. Positioning welding device according to claim 3 or 4, characterized in that The welding base is provided with a third driving structure. The third driving structure drives the welding base to move along the width direction of the battery cell, and is used for welding the same tab multiple times along the width direction of the battery cell.

6. The positioning welding apparatus according to claim 5, wherein The positioning structure comprises first and second positioning structures. The first and second positioning structures are arranged on the first surface. The first positioning structure is used for positioning the battery cell. The second positioning structure is used for positioning the adapter pieces.

7. The positioning and welding apparatus of claim 6, wherein, The first and second positioning structures are detachably connected to the first surface.

8. The positioning welding apparatus according to claim 1, wherein The driving structure is provided with a limiting device for limiting the moving displacement or rotating degree of the welding base.

9. The positioning welding device according to claim 8, characterized in that The driving structure can further comprise an adjusting device. The adjusting device is connected with the limiting device and is used for adjusting the position of the limiting device.

10. An assembly line for assembling a battery, characterized in that The application relates to a positioning and welding device for welding tabs of a battery cell. The welding head and the welding seat are overlapped in the projection direction of the battery thickness. The positioning and welding device is arranged between the welding head and the welding seat along the battery thickness direction.

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