Ultrasonic welding tool

Abstract

The present invention belongs to the technical field of battery production equipment, specifically an ultrasonic welding tool, including a three-dimensional stage and a battery cell jig, the three-dimensional stage including a first azimuth stage, a second azimuth stage, and a third azimuth stage, wherein the first azimuth stage is mounted on a workbench and is provided with a first moving mechanism for controlling the reciprocating translation of the first azimuth stage in a first azimuth; the second azimuth stage is mounted above the first azimuth stage and is provided with a second moving mechanism for controlling the reciprocating translation of the second azimuth stage in a second azimuth; a limiting mechanism is provided on the top of the third azimuth stage, and the battery cell jig is mounted on the third azimuth stage via the limiting mechanism. In the present invention, the three-dimensional stage includes a horizontal motion mechanism and a vertical motion mechanism. The three-dimensional movement enables the battery cell jig on the three-dimensional stage to move independently in three-dimensional space, forming a multi-dimensional movement to meet the requirements of ultrasonic welding, thereby improving the welding quality of the battery cell.

Description

Technical Field

[0001] The invention belongs to the technical field of battery production equipment, and in particular relates to an ultrasonic welding tool. Background Art

[0002] The main core components of aluminum shell batteries include battery cells, aluminum shells, cover plates, electrolytes, connectors, PET films, tapes, etc. The importance of the performance and safety of the battery cells is self-evident, and the quality of battery cell assembly directly determines the battery safety, electrical performance (capacity, energy, internal resistance, etc.) and electrochemical reactions. The assembly method of the battery cells is mainly directly affected by the quality of electrode assembly, ultrasonic welding quality, laser welding quality and the quality of related raw materials.

[0003] Compared with the quality of ultrasonic welding, the ultrasonic welding machines for lithium battery cells are basically imported ultrasonic welding machines. At present, domestic ultrasonic welding machines are also gradually rising, but in terms of performance, quality and safety, the imported ultrasonic welding machines are obviously better than domestic ultrasonic welding machines. However, both domestic and imported ultrasonic welding machines are single-machine semi-automatic equipment, including the ultrasonic welding equipment on the automatic line, which are assembled as single-machine equipment. The quality of battery cell welding is mainly determined by ultrasonic welding machines and ultrasonic welding fixtures. On the other hand, ultrasonic welding machines are mainly determined by transducers and generators. Relatively speaking, lithium batteries have a history of more than ten years of development, and ultrasonic welding machines have gradually become stable. However, the quality of welding fixtures directly determines the battery cell products and quality. For battery cells welded with aluminum shell batteries, the method of ultrasonic fixtures is particularly important. Problems such as cold welding, over-welding, fracture, and broken welds after welding play a key role.

[0004] However, in the existing battery cell assembly process, a single battery cell is usually welded directly to the cover plate connecting piece, or a single battery cell is divided into two or more battery cells and welded to the connecting piece respectively (the so-called butterfly welding). Due to the current industry development, the requirements for gram capacity, cruising mileage, cycle period, life, battery pack energy ratio and safety are getting higher and higher. In order to meet the above requirements as much as possible, the battery cell energy has been increased. However, as the battery cell energy increases, the number of battery layers increases. As the number of layers increases, a single battery cell cannot be ultrasonically welded at one time. Therefore, the battery cell is divided into two or more cells and then welded together. Ultrasonic welding machines and ultrasonic jigs play an extremely critical role in the quality of battery cell production. Summary of the Invention

[0005] The purpose of the present invention is to provide an ultrasonic welding tool, which includes a bracket with a three-dimensional adjustment function. Through adjustment in three directions, the top battery cell fixture can be accurately moved in a three-dimensional airdrop, so that the welder can weld in multiple directions, thereby improving the welding quality.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an ultrasonic welding tool, comprising a three-dimensional stage and a battery cell fixture, characterized in that: the three-dimensional stage comprises a first orientation stage, a second orientation stage and a third orientation stage, wherein the first orientation stage is installed on the workbench, and a first moving mechanism is provided to control the reciprocating translation of the first orientation stage in the first orientation; the second orientation stage is installed above the first orientation stage, and a second moving mechanism is provided to control the reciprocating translation of the second orientation stage in the second orientation; the third orientation stage is arranged above the second orientation stage, and a third moving mechanism is provided to control the reciprocating translation of the third orientation stage in the third orientation; the first orientation, the second orientation and the third orientation constitute a three-dimensional rectangular coordinate system; a limiting mechanism is provided on the top of the third orientation stage, and the battery cell fixture is installed on the third orientation stage through the limiting mechanism.

[0007] In the above technical solution, the three-dimensional platform includes a horizontal motion mechanism and a vertical motion mechanism. The three-dimensional movement enables the battery cell fixture on the three-dimensional platform to move independently in the three-dimensional space, forming multi-dimensional movement to meet the ultrasonic welding requirements, thereby improving the welding quality of the battery cell.

[0008] Preferably, the limiting mechanism is a positioning block disposed on the top surface of the third positioning platform. The positioning block forms a limiting area that cooperates with the battery jig, thereby eliminating the need for fixings to secure the battery jig, thereby facilitating movement. The three-dimensional platform is provided with a welder position recessed toward the interior of the three-dimensional platform on the side facing the welding machine, and the welder position is located below the welder work area of the battery jig. The welder can be moved to the welder position and face the welder work area. The recessed welder position occupies the internal space of the three-dimensional platform, which helps to reduce the space occupied by the entire device. At the same time, it allows the entire battery jig to be completely located on the third positioning platform, which rationally utilizes space while ensuring the stability of the battery jig.

[0009] Preferably, the first orientation and the third orientation are horizontal orientations, and the second orientation is vertical orientation; the first moving mechanism includes a first track and a lower slider arranged at the bottom of the first orientation platform, and the lower slider movably engages the first track; the third moving mechanism includes a second track and an upper slider arranged at the bottom of the third orientation platform, and the upper slider movably engages the second track; the second moving mechanism includes a lifting stud assembly arranged perpendicular to the first orientation platform, the lower part of the lifting stud assembly is installed on the first orientation platform, and the upper part is movably connected to the second orientation platform; a guide column is vertically arranged on the back of the second orientation platform, and the guide column passes through the first orientation platform.

[0010] Preferably, the first moving mechanism also includes two first positioning bolt groups, which are respectively arranged at the front and rear of the first track, and the bolts in the first positioning bolt group can touch the first orientation platform and position the first orientation platform; the second moving mechanism also includes two second positioning bolt groups arranged on the second orientation platform, and a limit member arranged on the third orientation platform, the positioning bolts of the second positioning bolt group are arranged opposite each other and the limit member extends downward to between the two positioning bolts; a support stud is longitudinally arranged on the first orientation platform, and the lower part of the support stud is threadedly connected to the stud rack arranged on the first orientation platform, and the upper end touches the second orientation platform.

[0011] Preferably, the battery cell jig includes a base and a cover hinged to the top of the base, the cover can be opened or closed on the base, the welder working area of the battery cell jig is located in the middle of the battery cell jig, including a welder avoidance area arranged in the middle of the cover; two battery cell slots are symmetrically arranged on the base, two electrode plate slots are arranged between the two battery cell slots, and the welder avoidance area is located above the welder position; after the battery cell is placed in the battery cell slot, the electrode plates of the two battery cells are in contact in the electrode plate slot.

[0012] Preferably, the base includes a bottom plate and an upper seat plate, the cover plate includes an upper cover plate and a lower inner cover plate, and the seat plate and the inner cover plate are insulated, and the cell slots and plate slots are arranged on the seat plate.

[0013] Preferably, a lock hook and a lock body are provided on the base and the cover. After the cover is closed, the lock hook and the lock body can be locked with each other, and a handle is provided on the front of the cover to facilitate the rapid movement of the entire fixture.

[0014] Preferably, a pressure plate made of insulating material is movably arranged between the two battery cell slots, a welding hole is provided on the pressure plate facing the electrode slot, and a pressure plate strip is provided on the cover plate. After the cover plate is closed, the pressure plate strip presses the pressure plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0016] Figure 1 It is a schematic diagram of the right side planar structure of an embodiment of the present invention.

[0017] Figure 2 Schematic diagram of the rear planar structure of an embodiment of the present invention.

[0018] Figure 3 2 is a schematic diagram of the rear three-dimensional structure of an embodiment of the present invention.

[0019] Figure 4 for Figure 1Schematic diagram of the installation structure of the battery cell fixture.

[0020] Figure 5 for Figure 1 Schematic diagram of the front three-dimensional structure of the middle adjustment platform.

[0021] Figure 6 for Figure 1 Schematic diagram of the cell fixture in the open state.

[0022] Figure 7 for Figure 6 Schematic diagram of the split structure of the central isolation board.

[0023] In the figure, the workbench 1, the guide column 2, the support stud 3, the stud rack 4, the lower slider 5, the lifting stud assembly 6, the first positioning platform 7, the first positioning bolt group 8, the first track 9, the linear bearing 10, the upper slider 11, the second positioning bolt group 12, the second positioning platform 13, the limiter 14, the buffer block 15, the positioning block 16, the battery fixture 17, the third positioning platform 18, the second track 19, the welding machine position 20, the upper cover 171, the inner cover 172, the seat plate 173, the battery cell slot 174, the bottom plate 175, the hinge 176, the pressure plate 177, the pressure plate strip 178, the matching groove 179, the finger groove 180, the matching block 181, the welding hole 182, the pressure plate groove 183, the plate groove 184, the lock hook 185, the lock body 186, and the welding machine avoidance area 187. DETAILED DESCRIPTION

[0024] The following will describe the implementation methods of the present application in detail with reference to the accompanying drawings and examples, so that the implementation process of how the present application applies technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0025] See also Figure 1-7 The present invention provides an ultrasonic welding tool. The ultrasonic welding tool includes a three-dimensional platform and a battery fixture, wherein the three-dimensional platform includes a first orientation platform 7, a second orientation platform 13, and a third orientation platform 18. The first orientation platform 7 is installed on a workbench 1 and is provided with a first moving mechanism for controlling the reciprocating translation of the first orientation platform 7 in a first orientation; the second orientation platform 13 is installed above the first orientation platform 7 and is provided with a second moving mechanism for controlling the reciprocating translation of the second orientation platform 13 in a second orientation; the third orientation platform 18 is installed above the second orientation platform 13 and is provided with a third moving mechanism for controlling the reciprocating translation of the third orientation platform 18 in a third orientation; the first orientation, the second orientation, and the third orientation constitute a three-dimensional rectangular coordinate system; the top of the third orientation platform 18 is surrounded by a positioning block 16 to form a rectangular limiting area, and the battery fixture is located in the limiting area and positioned.

[0026] In the above technical solution, the three-dimensional platform includes a horizontal motion mechanism and a vertical motion mechanism. The three-dimensional movement enables the battery cell fixture on the three-dimensional platform to move independently in the three-dimensional space, forming multi-dimensional movement to meet the ultrasonic welding requirements, thereby improving the welding quality of the battery cell.

[0027] by Figure 1 The orientation shown is a right side view of the embodiment.

[0028] The front of the 3D gantry is equipped with a welder station 20 recessed into the gantry. This station is located below the welder workspace of the battery jig. A welder in front of the gantry can be moved to the station 20, facing the workspace. The recessed station 20 occupies space within the gantry, minimizing the overall footprint of the device. This allows the entire battery jig to rest entirely on the third positioning platform 18, effectively utilizing space while ensuring the jig's stability.

[0029] Specifically, the first orientation and the third orientation are respectively forward and backward and left and right, and the second orientation is upward and downward. The first moving mechanism includes a first track 9 pointing forward and backward and a lower slider 5 arranged at the bottom of the first orientation platform 7, and the lower slider 5 is movably engaged with the first track 9; the third moving mechanism includes a second track 19 pointing left and right, and an upper slider 11 arranged at the bottom of the third orientation platform 18, and the upper slider 11 is movably engaged with the second track 19. In addition, buffer blocks 15 are arranged at both ends of the second track 19 to prevent the upper slider 11 from derailing; the second moving mechanism includes a lifting stud assembly 6 arranged perpendicular to the first orientation platform 7, the lower part of the lifting stud assembly 6 is installed on the first orientation platform 7, and the upper part is movably connected to the second orientation platform 13; a guide column 2 is vertically arranged at the four corners of the back of the second orientation platform 13, and the guide column 2 passes through the linear bearing 10 arranged on the first orientation platform 7.

[0030] To ensure the precise positioning of each orientation platform, the first moving mechanism also includes two first positioning bolt groups 8, which are respectively arranged in front and behind the first rail 9. The bolts in the first positioning bolt group 8 can touch the first orientation platform 7 and position the first orientation platform 7; the second moving mechanism also includes two second positioning bolt groups 12 arranged on the second orientation platform 13, and a limit member 14 arranged on the third orientation platform 18. The positioning bolts of the second positioning bolt group 12 are arranged opposite each other and the limit member 14 extends downward to between the two positioning bolts; a support stud 3 is longitudinally arranged on the first orientation platform 7, and the lower part of the support stud 3 is threadedly connected to the stud rack 4 arranged on the first orientation platform 7, and the upper end touches the second orientation platform 13.

[0031] The battery cell fixture used in this embodiment has a butterfly structure, consisting of a base and a cover. The rear ends of the two are hinged via a hinge 176. A lock body 186 and a lock hook 185 are provided at the front of the base and cover, respectively. A handle is provided on the cover. To ensure a precise fit between the two, a mating block 181 is provided on the edge of the cover, and a corresponding mating groove 179 is provided on the edge of the base. Specifically, the base includes a bottom plate 175 and an upper seat plate 173. The cover includes an upper cover plate 171 and a lower inner cover plate 172. The seat plate 173 and inner cover plate 172 are insulated. The welding machine working area of the battery cell jig is located in the middle of the battery cell jig, including a welding machine avoidance area 187 set in the middle of the cover plate. In addition, two battery cell slots 174 are symmetrically set on the base plate 173, and two electrode plate slots 184 are set between the two battery cell slots 174. The welding machine avoidance area 187 is located above the welding machine position 20. After the battery cell is placed in the battery cell slot 174, the electrode plates of the two battery cells contact in the electrode plate slot 184. In addition, a pressure plate slot 183 is set in the area where the battery cell slot 174 is located, and a pressure plate 177 is movably set in the pressure plate slot 183. The pressure plate 177 is provided with a welding hole 182 that is opposite to the electrode plate slot 184. To ensure the stability of the pressure plate 177, a pressure plate strip 178 is set on the cover plate. After the cover plate is closed, the pressure plate strip 178 presses the pressure plate 177 tightly.

[0032] For example, certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of the components as the criteria for distinction. For example, "including" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve the technical problem within a certain error range and basically achieve the technical effect.

[0033] It should be noted that the terms "include," "comprises," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a product or system comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such product or system. In the absence of further limitations, an element defined by the phrase "comprising a..." does not exclude the presence of other identical elements in the product or system comprising the element.

[0034] The foregoing description shows and describes several preferred embodiments of the present invention. However, as previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. Rather, the present invention can be used in various other combinations, modifications, and environments and can be modified within the scope of the inventive concept described herein by the teachings above or by techniques or knowledge in the relevant art. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention are intended to be within the scope of the appended claims.

Claims

1. An ultrasonic welding tool, comprising a three-dimensional stand and a battery fixture, characterized in that: The three-dimensional platform includes a first orientation platform, a second orientation platform and a third orientation platform, wherein the first orientation platform is installed on the workbench and is provided with a first moving mechanism for controlling the reciprocating translation of the first orientation platform in the first orientation; the second orientation platform is installed above the first orientation platform and is provided with a second moving mechanism for controlling the reciprocating translation of the second orientation platform in the second orientation; the third orientation platform is installed above the second orientation platform and is provided with a third moving mechanism for controlling the reciprocating translation of the third orientation platform in the third orientation; the first orientation, the second orientation and the third orientation constitute a three-dimensional rectangular coordinate system; a limiting mechanism is provided on the top of the third orientation platform, and the battery cell fixture is mounted on the third orientation platform through the limiting mechanism; The battery cell jig includes a base and a cover hinged to the base, the cover can be opened or closed on the base, the welder working area of the battery cell jig is located in the middle of the battery cell jig, including a welder avoidance area provided in the middle of the cover; two battery cell slots are symmetrically provided on the base, two electrode plate slots are provided between the two battery cell slots, and the welder avoidance area is located above the welder position; after the battery cell is placed in the battery cell slot, the electrode plates of the two battery cells contact in the electrode plate slot; The base includes a bottom plate and an upper seat plate, the cover includes an upper cover plate and a lower inner cover plate, and the seat plate and the inner cover plate are insulated, and the cell slots and plate slots are arranged on the seat plate; A pressing plate made of insulating material is movably arranged between the two battery cell slots, and a welding hole is provided on the pressing plate that is directly opposite to the plate slot. A pressing plate strip is provided on the cover plate. When the cover plate is closed, the pressing plate strip presses the pressing plate tightly. A pressure plate groove is set in the area where the battery cell groove is located, and a pressure plate is movably set in the pressure plate groove. A welding hole is set on the pressure plate facing the electrode groove. A pressure plate strip is set on the cover plate. When the cover plate is closed, the pressure plate strip presses the pressure plate tightly.

2. The ultrasonic welding tool according to claim 1, characterized in that: The limiting mechanism is a positioning block arranged on the top surface of the third positioning platform, and the positioning block encloses a limiting area that cooperates with the battery fixture; the three-dimensional platform is provided with a welding machine position recessed toward the inside of the three-dimensional platform on the side facing the welding machine, and the welding machine position is located below the welding machine working area of the battery fixture, and the welder can be moved to the welding machine position and face the welding machine working area.

3. The ultrasonic welding tool according to claim 1, characterized in that: The first orientation and the third orientation are horizontal orientations, and the second orientation is vertical orientation; the first moving mechanism includes a first track and a lower slider disposed at the bottom of the first orientation platform, and the lower slider movably engages with the first track; The third moving mechanism includes a second track and an upper slider disposed at the bottom of the third positioning platform, and the upper slider movably engages with the second track; The second moving mechanism includes a lifting stud assembly arranged perpendicular to the first azimuth platform, the lower part of the lifting stud assembly is installed on the first azimuth platform, and the upper part is movably connected to the second azimuth platform; a guide column is vertically arranged on the back of the second azimuth platform, and the guide column passes through the first azimuth platform.

4. The ultrasonic welding tool according to claim 3, characterized in that: The first moving mechanism also includes two first positioning bolt groups, which are respectively arranged at the front and rear of the first track, and the bolts in the first positioning bolt group can touch the first orientation platform and position the first orientation platform; the second moving mechanism also includes two second positioning bolt groups arranged on the second orientation platform, and a limit member arranged on the third orientation platform, the positioning bolts of the second positioning bolt group are arranged opposite each other and the limit member extends downward to between the two positioning bolts; a support stud is longitudinally arranged on the first orientation platform, the lower part of the support stud is threadedly connected to the stud rack arranged on the first orientation platform, and the upper end touches the second orientation platform.

5. The ultrasonic welding tool according to claim 1, characterized in that: A lock hook and a lock body are arranged on the base and the cover plate. After the cover plate is closed, the lock hook and the lock body can be locked with each other, and a handle is arranged on the front of the cover plate.

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