Battery cell tab ultrasonic welding device

Abstract

The utility model provides a battery cell tab ultrasonic welding device which is used for welding a tab of a battery cell, the battery cell comprises a battery cell main body and the tab arranged on one side of the battery cell main body, and the battery cell tab ultrasonic welding device comprises a supporting piece, a pressing piece and an ultrasonic welding head; a tab containing area is arranged at the position, corresponding to the tab, of the supporting piece, the pressing piece is detachably arranged on the tab containing area, a positioning hole is formed in the position, corresponding to the tab, of the pressing piece, and the ultrasonic welding head can penetrate through the positioning hole and abut against the tab; according to the utility model, the plurality of tabs are pre-pressed through the pressing piece, and the tabs of the battery cell form a fixed shape under the pressure action of the pressing piece, so that the consistency of the shapes of the tabs is ensured; the ultrasonic equipment controls the ultrasonic welding head to move downwards, the ultrasonic welding head penetrates through the positioning holes to weld partial areas of the tabs, welding marks are formed on the surfaces of the tabs, the welding stress of the tabs is effectively improved, the welding positions of the tabs are unified, and then the stability and consistency of products are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery welding technical field, concretely relates to a kind of battery cell tab ultrasonic welding device. BACKGROUND

[0002] Tab ultrasonic welding is a kind of efficient, environmental protection and accurate welding technology, plays a vital role in battery manufacturing, especially in battery cell production.The existing tab ultrasonic tool does not pre-press tab shape, forming relies on ultrasonic device ultrasonic welding head stress to reach set value to control, and it is difficult to guarantee the consistency of tab shape;Therefore, how to overcome the above-mentioned technical problems and defects become the key problem to be solved. SUMMARY

[0003] In view of the problem that the existing tab ultrasonic tool does not pre-press tab shape, and it is difficult to guarantee the consistency of tab shape, the utility model provides a kind of battery cell tab ultrasonic welding device.

[0004] The utility model solves the technical scheme adopted by the above technical problems as follows:

[0005] The utility model provides a kind of battery cell tab ultrasonic welding device for the tab welding of battery cell, the battery cell includes battery cell main body and the tab of the one side of battery cell main body, and it includes: support piece, pressure joint and ultrasonic welding head;

[0006] The support piece is provided with tab accommodating area in the position corresponding to the tab, the pressure joint is detachably arranged on the tab accommodating area, the pressure joint is provided with positioning hole in the position corresponding to the tab, and the ultrasonic welding head can pass through the positioning hole and abut against the tab.

[0007] Optionally, the support piece includes first surface, step surface and second surface, the second surface is arranged protruding from the first surface, and the first surface and the second surface are connected by the step surface transition;

[0008] The battery cell main body is arranged on the first surface, part of the tab region extends to the second surface, and the pressure joint is arranged on the second surface.

[0009] Optionally, the step surface is inclined surface or arc surface.

[0010] Optionally, the both ends of the step surface are provided with limiting stage, the upper surface of the limiting stage is higher than the step surface, and the limiting stage and the step surface form a gap, and the gap is used for the tab to extend from the first surface to the second surface.

[0011] Optionally, a plurality of guide posts are further included, a plurality of guide post through holes are arranged on the compression fitting and penetrating through both sides of the compression fitting, a guide post hole is arranged on the second surface corresponding to the position of the guide post through hole, and a plurality of guide posts are connected to the corresponding guide post holes by penetrating through a plurality of guide post through holes.

[0012] Optionally, a plurality of adjusting bolts are further included, a plurality of bolt through holes are arranged on the compression fitting, and a plurality of adjusting bolts are threadedly connected to the corresponding bolt through holes.

[0013] Optionally, the tab includes a positive tab and a negative tab, the positive tab and the negative tab are arranged on the same side of the battery cell body, a positioning hole is arranged on the compression fitting corresponding to the position of the positive tab and the negative tab, and two ultrasonic welding heads are arranged, and the two ultrasonic welding heads penetrate through the corresponding positioning holes and weld the positive tab and the negative tab, respectively, when working.

[0014] Optionally, a positioning structure is further included, and the positioning structure is arranged on the side of the first surface away from the step surface, and is used for positioning the battery cell body on the support.

[0015] Optionally, the positioning structure includes a horizontal limiting block and a vertical limiting block, one end of the vertical limiting block is connected to one end of the horizontal limiting block, and the other end of the vertical limiting block extends along the length direction perpendicular to the horizontal limiting block; the positioning structure is provided with two, the horizontal limiting blocks of the two positioning structures are arranged in parallel, and the vertical limiting blocks of the two positioning structures are located on the same straight line.

[0016] Optionally, the surface of the vertical limiting block is in abutment with the side of the battery cell body away from the tab, the surface of the limiting table is in abutment with the side of the battery cell body close to the tab, and the surfaces of the two horizontal limiting blocks are in abutment with the two ends of the battery cell body, respectively.

[0017] Optionally, a plurality of fixing bolts are further included, a plurality of step through holes are arranged on the positioning structure and penetrating through both sides of the positioning structure, a threaded mounting hole is arranged on the first surface corresponding to the position of the step through hole, and a plurality of fixing bolts are threadedly connected to the corresponding threaded mounting holes by penetrating through a plurality of step through holes.

[0018] According to the electric core tab ultrasonic welding device, the electric core is placed on the supporting piece, the pressing piece is arranged on the side of the electric core body close to the tab, the pressing piece pre-presses the plurality of tab pieces, the electric core tab forms a fixed shape under the pressure of the pressing piece, the consistency of the tab shape is guaranteed, the ultrasonic welding head is controlled to move downward by the ultrasonic equipment, the tab part region is fused through the positioning hole, the welding mark is formed on the tab surface, and the electric core is transferred to the next process after the ultrasonic welding is completed; the electric core tab ultrasonic welding device has perfect tool function, the tab forming shape is accurate through the pressure of the pressing piece, the tab part region is fused through the positioning hole by the ultrasonic welding head, the welding stress of the tab is effectively improved, the welding position of the tab is unified, and the stability and consistency of the product are improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will be briefly introduced the drawings needed to be used in the description of the embodiments of the utility model, obviously, the drawings in the following description only some embodiments of the utility model, for those skilled in the art, under the premise of not paying the creative labor, other drawings can also be obtained according to these drawings.

[0020] Figure 1 It is the structural schematic diagram of the electric core tab ultrasonic welding device provided by an embodiment of the utility model;

[0021] Figure 2 It is the explosion schematic diagram of the electric core tab ultrasonic welding device provided by an embodiment of the utility model;

[0022] Figure 3 It is the structural schematic diagram of the supporting piece in the electric core tab ultrasonic welding device provided by an embodiment of the utility model;

[0023] Figure 4 It is the structural schematic diagram of the electric core in the electric core tab ultrasonic welding device provided by an embodiment of the utility model;

[0024] The reference signs in the drawings of the specification are as follows:

[0025] 1-supporting piece;11-tab containing area;12-first surface;121-threaded mounting hole;13-step surface;14-second surface;141-guide column hole;15-limiting table;151-notch;2-positioning structure;21-horizontal limiting block;22-vertical limiting block;23-step through hole;3-pressing piece;31-positioning hole;32-guide column via hole;33-bolt via hole;4-ultrasonic welding head;5-fixing bolt;6-guide column;7-adjusting bolt;8-electric core;81-electric core body;82-tab;821-positive tab;822-negative tab;83-welding mark. DETAILED DESCRIPTION

[0026] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model clearer and more apparent, the utility model will be further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model and not to limit the utility model.

[0027] In the description of the utility model, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "radial", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as a limitation on the utility model. In the description of the utility model, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0028] In the description of the utility model, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connection" and "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0029] As shown in FIG. 1, in an embodiment, the utility model provides an ultrasonic welding device for the electrode lug of the battery cell, which is used for welding the electrode lug 82 of the battery cell 8, the battery cell 8 comprises a battery cell body 81 and an electrode lug 82 arranged on one side of the battery cell body 81, and the ultrasonic welding device for the electrode lug of the battery cell comprises a supporting piece 1, a pressing piece 3 and an ultrasonic welding head 4. Figures 1-2 The supporting piece 1 is provided with an electrode lug accommodating area 11 corresponding to the position of the electrode lug 82, the pressing piece 3 is detachably arranged on the electrode lug accommodating area 11, the pressing piece 3 is provided with a positioning hole 31 corresponding to the position of the electrode lug 82, and the ultrasonic welding head 4 can pass through the positioning hole 31 and abut against the electrode lug 82.

[0030] Specifically, the supporting piece 1 is in the shape of a cuboid, the battery cell 8 is placed on the surface of the supporting piece 1, one side of the battery cell 8 is provided with the electrode lug 82, and the electrode lug 82 is formed by a plurality of electrode lug 82 pieces stacked.

[0031] The ultrasonic welding head 4 is installed on an ultrasonic device; the positioning hole 31 is used for the ultrasonic welding head 4 to pass through and weld the electrode lug 82;

[0032] ​

[0033] In the working state, the battery cell 8 is placed on the support 1, the pressing member 3 is arranged in the tab accommodating area 11, the pressing member 3 pre-presses the plurality of tab 82 pieces, the tab 82 of the battery cell 8 forms a fixed shape under the pressure of the pressing member 3, and the consistency of the shape of the tab 82 is ensured; the ultrasonic device controls the ultrasonic welding head 4 to move downward, penetrates the positioning hole 31, and melts the tab 82 in the partial area, forms a welding mark 83 on the surface of the tab 82, and the battery cell 8 completes the ultrasonic welding and enters the next process.

[0034] The battery cell tab ultrasonic welding device of the application can make the tab 82 form an accurate shape under the pressure of the pressing member 3, ensure the consistency of the shape of the tab 82, set the positioning hole 31 on the pressing member 3, and make the ultrasonic welding head 4 penetrate the positioning hole 31 to melt the tab 82 in the partial area, effectively improve the welding stress of the tab 82, unify the welding position of the tab 82, and further improve the stability and consistency of the welding of the tab 82; the pressing member 3 of the application can realize the pressing function of the tab 82 and the welding function of the tab 82 by the ultrasonic welding head 4 at the same time, and the battery cell tab ultrasonic welding device of the application has the advantages of simple structure and perfect tool function.

[0035] As shown in the drawings, Figures 1-3 In an embodiment, the support 1 includes a first surface 12, a stepped surface 13, and a second surface 14, the second surface 14 is arranged protruding from the first surface 12, and the first surface 12 and the second surface 14 are connected by the stepped surface 13.

[0036] The battery cell body 81 is arranged on the first surface 12, and the partial area of the tab 82 extends to the second surface 14, and the pressing member 3 is arranged on the second surface 14.

[0037] Specifically, the battery cell body 81 is arranged on the first surface 12, the side of the battery cell body 81 away from the tab 82 abuts against the positioning structure 2, and the side of the battery cell body 81 close to the tab 82 abuts against the stepped surface 13, so as to position and limit the battery cell 8 and avoid the movement of the battery cell 8.

[0038] The second surface 14 is arranged protruding from the first surface 12, and the tab accommodating area 11 is arranged on the second surface 14, so that the tab 82 extends to the tab accommodating area 11 of the second surface 14, the tab 82 forms an accurate shape under the pressure of the pressing member 3, and the stability and consistency of the product are improved.

[0039] As shown in the drawings, Figures 2-3 In an embodiment, the stepped surface 13 is an inclined surface or an arc surface.

[0040] In a preferred embodiment, the stepped surface 13 is an arc surface, which can not only make the lower surface of the tab 82 of the battery cell 8 compressively deform, but also completely avoid the breakage of the root of the tab 82 and affect the electrical conductivity and welding performance of the tab 82.

[0041] As Figures 2-3 shown, in an embodiment, the two ends of the stepped surface 13 are provided with limiting tables 15, the upper surfaces of the limiting tables 15 are higher than the stepped surface 13, and a gap 151 is formed between the two limiting tables 15 and the stepped surface 13, which is used for the tab 82 to extend from the first surface 12 to the second surface 14.

[0042] Specifically, the length of the gap 151 is greater than or equal to the sum of the length of the two adjacent tabs 82 and the distance between the two adjacent tabs 82, so that the two tabs 82 can both extend to the second surface 14; at the same time, the length of the gap 151 is less than the length of the battery cell 8, and the side of the battery cell main body 81 close to the tab 82 abuts against the limiting table 15, so as to position and limit the battery cell 8 through the limiting table 15, avoiding the movement of the battery cell 8.

[0043] Further, the edges of the limiting tables 15 at the two ends of the gap 151 are rounded, so as to avoid damaging the tab 82 when contacting the tab 82.

[0044] As Figures 1-2 shown, in an embodiment, a plurality of guide columns 6 are further included, the pressing member 3 is provided with a plurality of guide column through holes 32 penetrating through both sides of the pressing member 3, the second surface 14 is provided with a guide column hole 141 corresponding to the position of each guide column through hole 32, and the plurality of guide columns 6 are connected with the corresponding guide column holes 141 by penetrating through the plurality of guide column through holes 32.

[0045] Specifically, the guide column 6 includes a first cylindrical segment and a second cylindrical segment, one end of the first cylindrical segment is connected with one end of the second cylindrical segment, and the diameter of the first cylindrical segment is greater than the diameter of the second cylindrical segment; the diameter of the guide column through hole 32 is greater than the diameter of the guide column hole 141, and in use, the first cylindrical segment is embedded in the guide column through hole 32, and the second cylindrical segment is embedded in the guide column hole 141, thereby positioning the pressing member 3.

[0046] As Figures 1-2 shown, in an embodiment, a plurality of adjusting bolts 7 are further included, and the pressing member 3 is provided with a plurality of bolt through holes 33, and the plurality of adjusting bolts 7 are threadedly connected with the plurality of bolt through holes 33, respectively.

[0047] Specifically, the adjusting bolt 7 is threadedly connected with the bolt through hole 33, so that the adjusting bolt 7 and the pressing member 3 form an integral whole, thereby facilitating the on-site operator to move and place the pressing member 3.

[0048] As Figure 2 and Figure 4As shown, in an embodiment, the tab 82 includes a positive tab 821 and a negative tab 822, both of which are arranged on the same side of the cell body 81, and the pressing member 3 is provided with positioning holes 31 corresponding to the positions of the positive tab 821 and the negative tab 822, and the ultrasonic welding head 4 is provided with two, which penetrate through the corresponding positioning holes 31 to weld the positive tab 821 and the negative tab 822 respectively when working.

[0049] Specifically, the positive tab 821 and the negative tab 822 are arranged on the same side of the cell 8, the positive tab 821 includes a plurality of positive tab 821 pieces stacked, and the negative tab 822 includes a plurality of negative tab 822 pieces stacked, the pressing member 3 is provided with positioning holes 31 corresponding to the positions of the positive tab 821 and the negative tab 822, and the ultrasonic welding head 4 is provided with two, which penetrate through the corresponding positioning holes 31 to weld the positive tab 821 and the negative tab 822 respectively when working.

[0050] The cell 8 tab 82 ultrasonic welding device of the present application has a simple structure and perfect tool function, and can simultaneously complete ultrasonic welding of the positive tab 821 and the negative tab 822 in the same ultrasonic welding device, thereby improving the tab 82 welding efficiency.

[0051] As shown in the drawings, Figures 1-2 In an embodiment, the positioning structure 2 is arranged on the side of the first surface 12 away from the step surface 13, and is used for positioning the cell body 81 on the support 1.

[0052] Specifically, the positioning structure 2 is arranged on the side of the first surface 12 away from the step surface 13, and the side of the cell body 81 away from the tab 82 abuts against the positioning structure 2, so as to limit the position of the cell body 81 on the support 1, and the cell 8 is accurately positioned by the positioning structure 2.

[0053] As shown in the drawings, Figure 2 In an embodiment, the positioning structure 2 includes a horizontal limiting block 21 and a vertical limiting block 22, one end of the vertical limiting block 22 is connected to one end of the horizontal limiting block 21, and the other end of the vertical limiting block 22 extends along the length direction of the vertical horizontal limiting block 21; the positioning structure 2 is provided with two, the horizontal limiting blocks 21 of the two positioning structures 2 are arranged in parallel, and the vertical limiting blocks 22 of the two positioning structures 2 are located on the same straight line.

[0054] Specifically, the positioning structure 2 is L-shaped, thereby positioning and limiting the two corners of the electrode group 8 away from the tabs 82, to avoid movement of the electrode group 8.

[0055] As shown in the drawings, Figure 1 In an embodiment, one side of the electrode group body 81 away from the tabs 82 abuts against the surface of the vertical limiting block 22, and the other side of the electrode group body 81 close to the tabs 82 abuts against the surface of the limiting platform 15; the two ends of the electrode group body 81 respectively abut against the surfaces of the two horizontal limiting blocks 21.

[0056] Specifically, along the length direction of the electrode group 8, one side of the electrode group 8 away from the tabs 82 abuts against the vertical limiting blocks 22 of the two positioning structures 2; the two ends of the electrode group 8 respectively abut against the horizontal limiting blocks 21 of the two positioning structures 2; thereby positioning and limiting one side of the electrode group 8 away from the tabs 82 and the two ends of the electrode group 8 by the positioning structure 2, to avoid movement of the electrode group 8.

[0057] As shown in the drawings, Figures 1-2 In an embodiment, a plurality of fixing bolts 5 are further included, the positioning structure 2 is provided with a plurality of stepped through holes 23 penetrating through both sides of the positioning structure 2, the first surface 12 is provided with a threaded mounting hole 121 corresponding to the position of each stepped through hole 23, and the plurality of fixing bolts 5 are respectively screwed into the plurality of stepped through holes 23 and the corresponding threaded mounting holes 121.

[0058] Specifically, the fixing bolt 5 is provided with six, and each positioning structure 2 is provided with three stepped through holes 23 penetrating through both sides of the positioning structure 2, the stepped through holes 23 are respectively arranged on the vertical limiting block 22, the horizontal limiting block 21 and the corner of the positioning structure 2, thereby fixing and connecting the positioning structure 2 and the support 1 by the fixing bolt 5.

[0059] Further, a plurality of groups of threaded mounting holes 121 are arranged on the first surface 12, each group of threaded mounting holes 121 is arranged corresponding to the position of the stepped through hole 23; in use, the stepped through hole 23 on the positioning structure 2 is fixedly connected with different groups of threaded mounting holes 121 on the first surface 12, thereby fixing the electrode group 8 with different lengths and / or widths.

[0060] The above merely describes the preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An ultrasonic welding device for battery cell tabs, used for welding tabs to battery cells, the battery cell comprising a battery cell body and tabs disposed on one side of the battery cell body, characterized in that: include: Support components, pressing components, and ultrasonic welding heads; The support member has an electrode receiving area corresponding to the position of the electrode tab. The pressing member is detachably disposed on the electrode receiving area. The pressing member has a positioning hole corresponding to the position of the electrode tab. The ultrasonic welding head can pass through the positioning hole and abut against the electrode tab.

2. The ultrasonic welding device for battery cell tabs according to claim 1, characterized in that: The support member includes a first surface, a stepped surface, and a second surface, wherein the second surface protrudes from the first surface, and the first surface and the second surface are connected by the stepped surface. The main body of the battery cell is disposed on the first surface, a portion of the electrode extends to the second surface, and the pressing component is disposed on the second surface.

3. The ultrasonic welding device for battery cell tabs according to claim 2, characterized in that: The step surface is an inclined surface or a curved surface.

4. The ultrasonic welding device for battery cell tabs according to claim 2, characterized in that: The stepped surface is provided with limiting platforms at both ends. The upper surface of the limiting platforms is higher than the stepped surface. A gap is formed between the two limiting platforms and the stepped surface. The gap is used to allow the electrode tab to extend from the first surface to the second surface.

5. The ultrasonic welding device for battery cell tabs according to claim 2, characterized in that: It also includes multiple guide posts. The pressing component is provided with multiple guide post through holes that penetrate both sides of the pressing component. The second surface is provided with guide post holes at the positions corresponding to the guide post through holes. The multiple guide posts are respectively connected to the corresponding guide post holes through the multiple guide post through holes.

6. The ultrasonic welding device for battery cell tabs according to claim 1, characterized in that: It also includes multiple adjusting bolts, and the pressing component is provided with multiple bolt through holes, and the multiple adjusting bolts are respectively threadedly connected to the multiple bolt through holes.

7. The ultrasonic welding device for battery cell tabs according to claim 1, characterized in that: The electrode tabs include a positive electrode tab and a negative electrode tab, both of which are located on the same side of the battery cell body. The pressing component has positioning holes corresponding to the positions of the positive and negative electrode tabs. Two ultrasonic welding heads are provided, and when the two ultrasonic welding heads are working, they pass through the corresponding positioning holes to weld the positive and negative electrode tabs respectively.

8. The ultrasonic welding device for battery cell tabs according to claim 4, characterized in that: It also includes a positioning structure, which is disposed on the side of the first surface away from the stepped surface, for positioning the battery cell body on the support.

9. The ultrasonic welding device for battery cell tabs according to claim 8, characterized in that: Each positioning structure includes a horizontal limiting block and a vertical limiting block. One end of the vertical limiting block is connected to one end of the horizontal limiting block, and the other end of the vertical limiting block extends along the length direction perpendicular to the horizontal limiting block. There are two positioning structures, and the horizontal limiting blocks of the two positioning structures are arranged in parallel, and the vertical limiting blocks of the two positioning structures are located on the same straight line.

10. The ultrasonic welding device for battery cell tabs according to claim 9, characterized in that: The side of the battery cell body away from the tab abuts against the surface of the vertical limiting block, and the side of the battery cell body closer to the tab abuts against the surface of the limiting platform; the two ends of the battery cell body abut against the surfaces of the two horizontal limiting blocks respectively.

11. The ultrasonic welding device for battery cell tabs according to claim 8, characterized in that: It also includes multiple fixing bolts. The positioning structure is provided with multiple stepped through holes that penetrate both sides of the positioning structure. The first surface is provided with threaded mounting holes at the positions corresponding to the stepped through holes. The multiple fixing bolts respectively penetrate the multiple stepped through holes and are threadedly connected to the corresponding threaded mounting holes.

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