Tab welding device

Abstract

The utility model belongs to the technical field of battery production, and discloses a tab welding device. The tab welding device comprises a bearing table, a welding platform and a flattening piece, the bearing table is used for supporting a battery cell body placed in the first direction, a battery cell tab is arranged at one end, in the second direction, of the battery cell body, and the first direction is perpendicular to the second direction; any one of the welding platform and the bearing platform can move in the first direction, so that the welding platform is close to or far away from the battery cell body; the flattening piece is arranged on the welding platform, the flattening piece and the battery cell tab are the same in height, and the flattening piece can move to the end of the battery cell tab from the root of the battery cell tab in the second direction so that the battery cell tab can be flattened. According to the tab welding device, the tab can be flattened before the welding procedure is started, so that the welding stability between the tab and the battery cell body is ensured, and the welding quality and the yield of the finally produced battery are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery production, in particular to a tab welding device. Background Art

[0002] As the driving energy source for new energy vehicles, the quality of power batteries directly impacts their service life. During the battery manufacturing process, the tabs of the power battery are welded to the busbars on both sides of the module. As a critical channel for battery current output, the quality of the welding directly affects the battery's performance and safety. Using traditional welding methods, this type of material is prone to cracking and deformation during the welding process, affecting battery quality.

[0003] Compared to batteries produced using traditional welding techniques, existing laser and ultrasonic welding methods offer higher energy density, faster welding speeds, and smaller heating zones. These methods are suitable for the production of power battery modules for new energy vehicles, which place high demands on welding deformation and precision. This significantly improves production efficiency while ensuring the quality and safety of battery products. During the welding process between the tabs and the busbars, the battery cell body with the busbars is often simply fixed, the tabs placed on the cell body, and then the welding process begins. At this point, the tabs may bend or wrinkle, resulting in uneven thickness between the tab and busbar weld layers. This can lead to poor welding quality and even battery detachment, resulting in a low yield rate for the resulting batteries.

[0004] Therefore, there is an urgent need to provide a new type of tab welding device to solve the above technical problems in the prior art. Utility Model Content

[0005] The purpose of the utility model is to provide a tab welding device, which can flatten the tab before starting the welding process, ensure the stability of the welding between the tab and the battery body, and improve the welding quality and the yield rate of the battery finally produced.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] The tab welding device includes a supporting platform, a welding platform and a flattening piece, wherein the supporting platform is used to support a battery cell body placed along a first direction, and a battery cell tab is provided at one end of the battery cell body along a second direction, and the first direction is perpendicular to the second direction; either the welding platform or the supporting platform can move along the first direction to make the welding platform approach or move away from the battery cell body; the flattening piece is provided on the welding platform, and the flattening piece has the same height as the battery cell tab, and the flattening piece can move from the root of the battery cell tab to the end of the battery cell tab along the second direction to flatten the battery cell tab.

[0008] Optionally, the welding platform is provided with a flattening assembly and a welding head, and both the flattening assembly and the welding head can be arranged facing the battery cell tab, and the flattening assembly can press and fix the battery cell tab along a third direction; the first direction, the second direction and the third direction are perpendicular to each other.

[0009] Optionally, the flattening assembly includes two pressing plates that can move closer to or farther away from each other along the third direction, and the pressing plates are provided with avoidance holes for avoiding the welding head.

[0010] Optionally, the welding platform is provided with a second driving member and a first slide rail extending along the second direction, the flattening assembly and the welding head are both installed on the welding bracket, the welding bracket is slidably connected to the first slide rail, and the welding bracket is connected to the output end of the second driving member.

[0011] Optionally, the welding bracket is further provided with a third driving member, and the flattening member is provided at the output end of the third driving member.

[0012] Optionally, the welding platform is provided with a welding seat facing the welding head, and the bottom of the battery cell tab can abut against the top of the welding seat.

[0013] Optionally, the welding bracket is further provided with a fourth driving member, and a dust removal device is provided at the output end of the fourth driving member, and the dust removal device can approach or move away from the welding head along the first direction.

[0014] Optionally, the welding bracket is further provided with a fifth driving member, and the welding head is connected to the output end of the fifth driving member so that the welding head can approach or move away from the battery cell tab along the third direction.

[0015] Optionally, the welding platform is slidably connected to a second slide rail extending along the first direction, and the welding platform is provided with a first driving member to enable the welding platform to move along the first direction to the position of the supporting platform.

[0016] Optionally, the bottom of the welding platform is connected to the output end of a lifting drive component, and the lifting drive component can drive the welding platform to rise and fall along the third direction.

[0017] Beneficial effects:

[0018] The tab welding device in the present invention uses a supporting platform to support and limit the battery cell body, and a battery cell tab is provided at one end of the battery cell body along the second direction. Then the welding platform drives the flattening piece to move along the first direction to move the flattening piece to the position of the battery cell tab, and the flattening piece moves from the root of the battery cell tab to the end of the battery cell tab, so that the battery cell tab is smoothed from the root to the end by the flattening piece. When the battery cell tab is subsequently welded to the battery cell body, the battery cell tab always remains flat without bending or wrinkling, thereby ensuring the stability of the welding between the tab and the battery cell body, improving the welding quality and the yield rate of the battery finally produced, and eliminating the need for secondary flattening and positioning, thereby improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is an axonometric diagram of a tab welding device provided in a specific embodiment of the present utility model;

[0020] Figure 2 yes Figure 1 A partial enlarged view of point A in the middle;

[0021] Figure 3 This is an axonometric view of the tab welding device provided by the specific embodiment of the utility model from another perspective;

[0022] Figure 4 This is an axonometric view from another perspective of the tab welding device provided in a specific embodiment of the present invention.

[0023] In the picture:

[0024] 10. Battery cell body; 11. Battery cell tab;

[0025] 100, welding platform; 110, welding bracket; 111, driving screw; 112, second slide rail; 113, first slide rail; 114, first driving member; 115, second driving member; 116, fifth driving member; 120, lifting driving member; 130, pressing plate; 131, avoidance hole; 140, welding head; 141, welding seat;

[0026] 201. Smoothing member; 202. Third driving member; 203. Fourth driving member; 204. Dust removal device. DETAILED DESCRIPTION

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0028] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0029] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0030] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0031] The first direction described in this embodiment is Figure 1 and Figure 4 The X direction is shown in the Figure 1 and Figure 4 The Y direction shown in the figure, the third direction is Figure 1 and Figure 4 In the Z direction shown in FIG, the X direction and the Y direction are two horizontal directions perpendicular to each other, the Z direction is a vertical direction, and the X direction, the Y direction and the Z direction are perpendicular to each other.

[0032] Please refer to Figure 1 and Figure 2In this embodiment, the tab welding device includes a supporting platform, a welding platform 100 and a flattening piece 201, the supporting platform is used to support the battery cell body 10 placed along the first direction, and the battery cell body 10 is provided with a battery cell tab 11 at one end along the second direction, and the first direction is perpendicular to the second direction; either the welding platform 100 or the supporting platform can move along the first direction to make the welding platform 100 approach or move away from the battery cell body 10; the flattening piece 201 is provided on the welding platform 100, and the flattening piece 201 has the same height as the battery cell tab 11, and the flattening piece 201 can move from the root of the battery cell tab 11 along the second direction to the end of the battery cell tab 11 to flatten the battery cell tab 11.

[0033] The tab welding device in this embodiment uses a supporting platform to support and limit the battery cell body 10. A battery cell tab 11 is provided at one end of the battery cell body 10 along the second direction. Then the welding platform 100 drives the flattening piece 201 to move along the first direction to move the flattening piece 201 to the position of the battery cell tab 11. The flattening piece 201 moves from the root of the battery cell tab 11 to the end of the battery cell tab 11, so that the battery cell tab 11 is smoothed from the root to the end by the flattening piece 201. When the battery cell tab 11 is subsequently welded to the battery cell body 10, the battery cell tab 11 always remains flat without bending or wrinkling, thereby ensuring the stability of the welding between the tab and the battery cell body 10, improving the welding quality and the yield rate of the battery finally produced, and eliminating the need for secondary flattening and positioning, thereby improving production efficiency.

[0034] Specifically, the flattening member 201 is a cylindrical rod-shaped object, which can flatten the cell tab 11 without damaging the surface of the cell tab 11 , thereby improving reliability.

[0035] Furthermore, the welding platform 100 is provided with a flattening assembly and a welding head 140. Both the flattening assembly and the welding head 140 can be positioned directly opposite the battery cell tab 11. The flattening assembly can compress and secure the battery cell tab 11 along a third direction; the first direction, the second direction, and the third direction are mutually perpendicular. After the flattening member 201 flattens the battery cell tab 11, the flattening assembly applies pressure to the battery cell tab 11 along the third direction to ensure that the battery cell tab 11 remains flat, allowing the welding head 140 to weld the battery cell tab 11 while facing the battery cell tab 11, further improving welding quality.

[0036] In this embodiment, the welding head 140 can be a laser welding head or an ultrasonic welding head, which is not specifically limited here.

[0037] Optionally, the flattening assembly includes two pressing plates 130 that can move toward or away from each other along the third direction. The pressing plates 130 are provided with avoidance holes 131, which are used to avoid the welding head 140. Specifically, the pressing plates 130 are driven by a driving cylinder or a driving motor, so that the two pressing plates 130 are moved toward each other to press the battery cell tab 11, while the welding head 140 passes through the avoidance holes 131 to weld the battery cell tab 11 without affecting the welding process.

[0038] like Figure 1 and Figure 3 As shown, the welding platform 100 is provided with a second driving member 115 and a first slide rail 113 extending along the second direction. The flattening assembly and the welding head 140 are both mounted on a welding bracket 110. The welding bracket 110 is slidably connected to the first slide rail 113, and the welding bracket 110 is connected to the output end of the second driving member 115. The first slide rail 113 supports and guides the welding bracket 110, ensuring that the welding bracket 110 drives the welding head 140 and the flattening assembly to smoothly approach the battery cell tab 11, and compress, fix and weld the battery cell tab 11, thereby improving production quality.

[0039] Further, return to reference Figure 2 The welding bracket 110 is further provided with a third driving member 202, and the flattening member 201 is disposed at the output end of the third driving member 202. The third driving member 202 drives the flattening member 201 to move in the second direction, thereby moving from the base to the end of the battery cell tab 11, flattening the battery cell tab 11 and improving welding quality. The third driving member 202 is a driving cylinder that can smoothly drive the flattening member 201. It also has a simple structure, reliable operation, a long service life, and is easy to maintain.

[0040] In this embodiment, the welding platform 100 is provided with a welding seat 141 facing the welding head 140, and the bottom of the battery cell tab 11 can abut against the top of the welding seat 141. In this embodiment, ultrasonic welding is adopted to weld the battery cell tab 11. The welding head 140 is the component that ultimately outputs ultrasonic energy to the workpiece during the welding operation. It is connected to the workpiece and transmits ultrasonic vibration energy to the workpiece. The material of the ultrasonic welding head 140 is usually titanium alloy, aluminum alloy and steel. When the operation requires, the welding head 140 can be processed according to the situation, such as high carbon steel embedding, chrome plating or anodizing. The function of the welding seat 141 is to fix and support the battery cell tab 11 to ensure the stability of the welding.

[0041] Optionally, the welding bracket 110 is further provided with a fourth driving member 203, and a dust removal device 204 is provided at the output end of the fourth driving member 203. The dust removal device 204 can move closer to or away from the welding head 140 along the first direction. In this embodiment, after welding is completed, the dust removal device 204 can purge the welding point between the battery cell tab 11 and the battery cell body 10 to ensure the cleanliness of the welding area and the welding quality; at the same time, after the battery cell body 10 is removed after welding, the welding seat 141 and the pressure plate 130 can be purged to ensure the cleanliness of the welding station of the tab welding device, without affecting the welding quality of the next battery cell body 10, thereby improving the welding quality of the product.

[0042] The dust removal device 204 described here is an air knife, which has better blowing and dust removal effects and will not be described in detail here.

[0043] like Figure 3 and Figure 4 As shown, the welding bracket 110 is further provided with a fifth driving member 116. The welding head 140 is connected to the output end of the fifth driving member 116 so as to move the welding head 140 toward or away from the battery cell tab 11 along the third direction. When the welding head 140 is positioned directly opposite the battery cell tab 11, the fourth driving member 203 can drive the welding head 140 to move downward along the third direction so that the welding head 140 approaches and eventually passes through the avoidance hole 131 and abuts against the upper surface of the battery cell tab 11, thereby welding the battery cell tab 11.

[0044] Optionally, the welding platform 100 is slidably connected to a second slide rail 112 extending along a first direction, and the welding platform 100 is provided with a first drive member 114 to enable the welding platform 100 to move along the first direction to the position of the support platform. In this embodiment, the first drive member 114 and the second drive member 115 are both drive motors. The first drive member 114 is connected to the welding platform 100 via a drive screw 111, and the second drive member 115 is connected to the welding bracket 110 via a drive screw 111, so that the welding bracket 110 moves along the first direction and the second direction respectively, and moves in coordination to the position of the battery cell body 10, thereby ensuring that the welding head 140 and the flattening member 201 can face the battery cell tab 11, thereby flattening the battery cell tab 11 and further improving the welding quality.

[0045] Furthermore, the bottom of the welding platform 100 is connected to the output end of the jacking drive 120, and the jacking drive 120 can drive the welding platform 100 to rise and fall along the third direction. Since the battery cell body 10 and the battery cell tab 11 have different sizes and specifications, it is necessary not only to adjust the position of the welding bracket 110 along the first direction and the second direction, but also to adjust the height position of the welding platform 100 along the third direction, so that the welding seat 141 and the welding head 140 can always face the battery cell tab 11 to perform the welding process of the battery cell tab 11. This is not only applicable to battery cell bodies 10 and battery cell tabs 11 of different sizes, thereby improving the scope of application, but also can improve the support of the welding seat 141 for the battery cell tab 11, thereby improving the welding quality.

[0046] The following is a detailed description of the working process of the tab welding device: before welding is started, the first driving member 114 moves the platform to the required position along the second slide rail 112 according to the model of the battery cell body 10, and then the carrier drives the battery cell body 10 to move to the front of the tab welding device along the logistics line, and the second driving member 115 and the jacking driving member 120 are started to make the welding bracket 110 move forward along the first slide rail 113 until the flattening member 201 is located at the position of the battery cell tab 11; the third driving member 202 is started to retract the flattening member 201 to flatten the battery cell tab 11, so that the upper and lower clamps are close to each other and clamp the battery cell tab 11, and the jacking driving member 120 is started to make the welding platform 100 and the welding seat 141 rise. The fifth driving member 116 drives the welding head 140 to descend, and the welding head 140 and the welding seat 141 contact the battery cell tab 11 at the same time for welding; after welding is completed, the lifting driving member 120 and the fifth driving member 116 make the welding head 140 and the welding seat 141 rise and retract respectively, and the two clamps also move away from each other, and the first driving member 114 and the second driving member 115 drive the welding platform 100 and the welding bracket 110 to start, so that the tab welding device returns to its original position with the slide rail; at the same time, if the tab welding device has not started the welding process, the fourth driving member 203 is started at this time to extend the dust removal device 204 to the position of the welding head 140 and the welding seat 141 for dust removal, and after each mechanism completes the action, all mechanisms return to their initial state.

[0047] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Tab welding device, characterized in that: include: A supporting platform, the supporting platform is used to support a battery cell body (10) placed along a first direction, a battery cell tab (11) is provided at one end of the battery cell body (10) along a second direction, the first direction being perpendicular to the second direction; a welding platform (100), wherein either the welding platform (100) or the supporting platform is capable of moving along the first direction so that the welding platform (100) is moved closer to or farther from the battery cell body (10); A flattening piece (201), the flattening piece (201) is arranged on the welding platform (100), the flattening piece (201) is at the same height as the battery cell tab (11), and the flattening piece (201) can move from the root of the battery cell tab (11) to the end of the battery cell tab (11) along the second direction to flatten the battery cell tab (11).

2. The tab welding device according to claim 1, characterized in that: The welding platform (100) is provided with a flattening assembly and a welding head (140), both of which can be arranged facing the battery cell tab (11), and the flattening assembly can press and fix the battery cell tab (11) along a third direction; the first direction, the second direction, and the third direction are perpendicular to each other.

3. The tab welding device according to claim 2, characterized in that: The flattening assembly comprises two pressing plates (130) capable of moving closer to or farther from each other along the third direction, and the pressing plates (130) are provided with avoidance holes (131) for avoiding the welding head (140).

4. The tab welding device according to claim 3, characterized in that: The welding platform (100) is provided with a welding seat (141) facing the welding head (140), and the bottom of the battery cell tab (11) can abut against the top of the welding seat (141).

5. The tab welding device according to claim 3, characterized in that: The welding platform (100) is provided with a second driving member (115) and a first slide rail (113) extending along the second direction; the flattening assembly and the welding head (140) are both mounted on a welding bracket (110); the welding bracket (110) is slidably connected to the first slide rail (113); and the welding bracket (110) is connected to the output end of the second driving member (115).

6. The tab welding device according to claim 5, characterized in that: The welding bracket (110) is further provided with a third driving member (202), and the flattening member (201) is provided at the output end of the third driving member (202).

7. The tab welding device according to claim 5, characterized in that: The welding bracket (110) is further provided with a fourth driving member (203), and an output end of the fourth driving member (203) is provided with a dust removal device (204), and the dust removal device (204) can approach or move away from the welding head (140) along the first direction.

8. The tab welding device according to claim 5, characterized in that: The welding bracket (110) is further provided with a fifth driving member (116), and the welding head (140) is connected to the output end of the fifth driving member (116) so that the welding head (140) moves closer to or farther from the battery cell tab (11) along the third direction.

9. The tab welding device according to any one of claims 1 to 8, characterized in that: The welding platform (100) is slidably connected to a second slide rail (112) extending along a first direction, and the welding platform (100) is provided with a first driving member (114) so ​​as to enable the welding platform (100) to move along the first direction to the position of the supporting platform.

10. The tab welding device according to claim 9, characterized in that: The bottom of the welding platform (100) is connected to the output end of a lifting drive component (120), and the lifting drive component (120) can drive the welding platform (100) to rise and fall along a third direction.

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