Positioning device and welding equipment
By designing a positioning device including positioning parts, adjusting parts and driving mechanisms, the laser focus alignment problem caused by inconsistent height of the battery core fixture is solved, and the welding quality is improved.
Patent Information
- Application Number
- CN202420646178.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-29
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-03-29
AI Technical Summary
In the prior art, since the heights of the various fixtures on which the battery cells are placed are different, the focus of the laser cannot be accurately aligned with the connection between the pole ear and the top cover, resulting in poor welding quality of the weld.
A positioning device is designed, including a positioning member, an adjusting member and a driving mechanism. Through the coordination of the adjusting member and the driving mechanism, the synchronous lifting and lowering of the top cover and the pole ear are ensured, thereby ensuring that the laser focus is aligned with the connection between the pole ear and the top cover.
Effectively ensure that the laser focus is aligned with the connection between the electrode ear and the top cover, improve the welding quality, and make the weld welding more accurate and stable.
Smart Images
Figure CN222448811U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of battery welding, in particular to a positioning device and welding equipment. Background Art
[0002] In the related art, the manufacturing process of the battery is as follows: the positive electrode sheet and the negative electrode sheet are stacked or wound to form a battery cell, the battery cell is placed in a shell, the tabs and the top cover of the battery cell are welded, and finally the electrolyte is injected. Among them, the welding of the battery cell and the top cover can usually be performed by laser welding. When the laser is welding the tab and the top cover, it is necessary to focus the laser on the connection between the tab and the top cover, so as to achieve precise laser welding of the tab and the top cover, so that the welding quality of the weld is higher. In the prior art, since the heights of the various jigs for placing the battery cell are different, the focus of the laser cannot be accurately aligned with the connection between the tab and the top cover, so that the welding quality of the weld between the tab and the top cover is poor. Utility Model Content
[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a positioning device that can effectively ensure that the focus of the laser is aligned with the connection between the pole ear and the top cover.
[0004] The utility model also provides a welding device.
[0005] According to the first aspect of the present invention, the positioning device comprises:
[0006] A positioning member, provided with a receiving cavity, wherein the receiving cavity is used to receive the battery cell;
[0007] An adjusting member, the adjusting member is located at one side of the positioning member, the adjusting member is provided with a placement cavity, and the placement cavity is used to place the top cover;
[0008] A driving mechanism is connected to the adjusting member, and the driving mechanism is used to drive the adjusting member to rise and fall relative to the positioning member, the adjusting member drives the top cover to rise and fall, and the top cover drives the tab of the battery cell to rise and fall.
[0009] According to the positioning device of the embodiment of the utility model, at least the following beneficial effects are achieved: the battery cell is placed in the accommodating cavity, and the top cover is placed in the placement cavity. Specifically, the top cover is placed on one side of the battery cell, and the pole ear of the battery cell can abut against the top cover. After that, the adjusting member is driven to rise and fall relative to the positioning member by the driving mechanism. When the driving mechanism drives the adjusting member to rise and fall, the top cover will also rise and fall synchronously, thereby driving the pole ear to rise and fall, which can effectively ensure that the focus of the laser is aligned with the connection between the top cover and the pole ear. Specifically, the positioning device can effectively ensure that the focus of the laser is aligned with the connection between the pole ear and the top cover.
[0010] According to the positioning device of some embodiments of the present utility model, the driving mechanism includes a connecting member and a first driving member, two ends of the connecting member are respectively connected to the adjusting member and the first driving member, and the first driving member is used to drive the connecting member to rise and fall.
[0011] According to the positioning device of some embodiments of the present utility model, two connecting members are provided, and the two connecting members are respectively connected to two sides of the adjusting member.
[0012] According to the positioning device of some embodiments of the present utility model, the positioning device further includes a fixing mechanism, and the fixing mechanism is used to fix the battery core in the accommodating cavity.
[0013] According to the positioning device of some embodiments of the present invention, the fixing mechanism includes a fixing member and a rotating member, the rotating member is connected to the fixing member, the fixing member is used to abut the battery core, and the rotating member can rotate to drive the fixing member to rotate.
[0014] According to the positioning device of some embodiments of the present invention, the fixing mechanism further includes a second driving member, the second driving member is connected to the rotating member, and the second driving member is used to drive the rotating member to rise and fall relative to the positioning member.
[0015] According to the positioning device of some embodiments of the present invention, a buffer layer is provided on a side of the fixing member facing the bottom wall of the accommodating cavity.
[0016] According to the positioning device of some embodiments of the present invention, the positioning member includes a plurality of abutment blocks and a bottom plate, and the plurality of abutment blocks are all connected to the bottom plate, wherein the plurality of abutment blocks together surround and form the accommodating cavity.
[0017] According to the positioning device of some embodiments of the present utility model, the abutment block is provided with a guide surface, and the guide surface is used to guide the battery core.
[0018] The welding equipment according to the second aspect of the present invention comprises the positioning device described in any one of the first aspect embodiments.
[0019] The welding equipment according to the embodiment of the utility model has at least the following beneficial effects: the battery cell is placed in the accommodating cavity, and the top cover is placed in the placement cavity. Specifically, the top cover is placed on one side of the battery cell, and the pole ear of the battery cell can abut against the top cover. After that, the adjusting member is driven to rise and fall relative to the positioning member by the driving mechanism. After the driving mechanism drives the adjusting member to rise and fall, the top cover will also rise and fall synchronously, thereby driving the pole ear to rise and fall, which can effectively ensure that the focus of the laser is aligned with the connection between the top cover and the pole ear. Specifically, the positioning device can effectively ensure that the focus of the laser is aligned with the connection between the pole ear and the top cover. Furthermore, when welding the battery cell and the top cover, the welding equipment with the positioning device can effectively ensure that the focus of the laser is aligned with the connection between the top cover and the pole ear, so that the quality of welding the battery by the welding equipment is better.
[0020] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:
[0022] Figure 1 A schematic diagram of a positioning device according to a first embodiment of the present utility model;
[0023] Figure 2 for Figure 1 The enlarged schematic diagram of point A in the middle;
[0024] Figure 3 It is a schematic diagram of a positioning device according to a second embodiment of the present utility model.
[0025] Reference numerals:
[0026] Positioning device 100 , positioning member 200 , abutment block 210 , guide surface 211 , bottom plate 220 , accommodating cavity 230 , adjusting member 300 , placement cavity 310 , connecting member 400 , fixing member 500 , rotating member 600 , battery cell 700 , tab 800 , top cover 900 . DETAILED DESCRIPTION
[0027] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.
[0028] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0029] In the description of the present utility model, "several" means more than one, "many" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used to distinguish the technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.
[0030] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.
[0031] In the description of the utility model, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0032] In the related art, the manufacturing process of the battery is as follows: the positive electrode sheet and the negative electrode sheet are formed into a battery cell 700 by lamination or winding, the battery cell 700 is placed in a shell, the tab 800 and the top cover 900 of the battery cell 700 are welded, and finally the electrolyte is injected. Among them, the welding of the battery cell 700 and the top cover 900 can usually be performed by laser welding. When the laser is welded to the tab 800 and the top cover 900, it is necessary to make the focus of the laser be aligned with the connection between the tab 800 and the top cover 900, so as to achieve the precise welding of the tab 800 and the top cover 900 by the laser, so that the welding quality of the weld is high. In the prior art, since the heights of the various jigs for placing the battery cell 700 are different from each other (this is due to the deviation caused by the processing technology when processing the jig), the focus of the laser cannot be accurately aligned with the connection between the tab 800 and the top cover 900, so that the welding quality of the weld between the tab 800 and the top cover 900 is poor. Specifically, taking two jigs as an example, one of which is higher than the other, when the battery cell 700 and the top cover 900 are placed on a jig with a smaller height, the focus of the laser can be just aimed at the connection between the tab 800 and the top cover 900, which can make the quality of the weld formed after the laser welding of the tab 800 and the top cover 900 good; when the battery cell 700 and the top cover 900 are placed on a jig with a larger height, since the height of the jig is greater than the previous jig, the focus of the laser cannot be concentrated on the connection between the tab 800 and the top cover 900, and the focus of the laser is located below the tab 800 and the top cover 900. To this end, the present application proposes a positioning device 100.
[0033] Please refer to Figures 1 to 3In some embodiments, the positioning device 100 includes: a positioning member 200, an adjusting member 300 and a driving mechanism. The positioning member 200 is provided with a accommodating cavity 230, and the accommodating cavity 230 is used to accommodate the battery cell 700. The battery cell 700 includes a body and a tab 800, and the body is formed by winding or laminating a positive electrode sheet and a negative electrode sheet, and the tab 800 is connected to the body. The tab 800 forms a circuit inside the battery by drawing out current. It is the only way for current to flow from the inside of the battery to the outside, ensuring that the battery can supply power normally. Furthermore, the tab 800 extracts current specifically by connecting the top cover 900. The adjusting member 300 is located on one side of the positioning member 200, and the adjusting member 300 is provided with a placement cavity 310, and the placement cavity 310 is used to place the top cover 900. For example, the adjusting member 300 is located at the front end of the positioning member 200. In this case, the front end of the positioning member 200 may be provided with an opening, so as to facilitate the extension of the tab 800. After the tab 800 is extended, it can abut against the top cover 900. After the tab 800 abuts against the top cover 900, it needs to be laser welded and fixed. The adjusting member 300 may also be located at the rear end of the positioning member 200. In this case, the rear end of the positioning member 200 may be provided with an opening, so as to facilitate the extension of the tab 800. After the tab 800 is extended, it can abut against the top cover 900. After the tab 800 abuts against the top cover 900, it needs to be laser welded and fixed.
[0034] Please refer to Figure 2 , the driving mechanism is connected to the adjusting member 300, and the driving mechanism is used to drive the adjusting member 300 to rise and fall relative to the positioning member 200, and the adjusting member 300 drives the top cover 900 to rise and fall, and the top cover 900 drives the pole tab 800 of the battery cell 700 to rise and fall. Specifically, the battery cell 700 is placed in the accommodating cavity 230, and the top cover 900 is placed in the placement cavity 310. Specifically, the top cover 900 is placed on one side of the battery cell 700, and the pole tab 800 of the battery cell 700 can abut against the top cover 900. After that, the adjusting member 300 is driven to rise and fall relative to the positioning member 200 by the driving mechanism. After the driving mechanism drives the adjusting member 300 to rise and fall, the top cover 900 will also rise and fall synchronously, thereby driving the pole tab 800 to rise and fall, which can effectively ensure that the focus of the laser is aligned with the connection between the top cover 900 and the pole tab 800. Specifically, the positioning device 100 can effectively ensure that the focus of the laser is aligned with the connection between the pole tab 800 and the top cover 900.
[0035] It should be added that the function of the positioning device 100 will be further described below. Taking two positioning devices 100 as an example, the height of the positioning member 200 in one positioning device 100 is greater than the height of the positioning member 200 in the other positioning device 100. When the pole tab 800 and the top cover 900 are placed on the positioning member 200 with a smaller height, the focus of the laser can be just aligned with the connection between the pole tab 800 and the top cover 900, which can make the quality of the weld formed after the laser welding of the pole tab 800 and the top cover 900 good. In this case, there is no need to start the driving mechanism. When the pole tab 800 and the top cover 900 are placed on the positioning member 200 with a larger height, the focus of the laser is located below the pole tab 800 and the top cover 900, rather than at the connection between the pole tab 800 and the top cover 900. Therefore, in this case, the driving mechanism is required to drive the positioning member 200 to descend, so that the positioning member 200 drives the pole tab 800 and the top cover 900 to descend, so that the connection between the pole tab 800 and the top cover 900 is aligned with the focus of the laser. In this way, the positioning device 100 can effectively ensure that the focus of the laser is aligned with the connection between the tab 800 and the top cover 900 .
[0036] It should be added that the shape of the battery cell 700 can be a rectangle, and the shape of the top cover 900 can also be a rectangle, so the shape of the accommodating cavity 230 and the shape of the placement cavity 310 can both be rectangles. The number of the accommodating cavity 230 and the placement cavity 310 is not specifically limited, and the number of the accommodating cavity 230 and the placement cavity 310 can be two, three, or four, so that more battery cells 700 and top covers 900 can be placed.
[0037] Further, the specific structure of the driving mechanism is described below. Figure 2 In some embodiments, the driving mechanism includes a connecting member 400 and a first driving member, and the two ends of the connecting member 400 are respectively connected to the adjusting member 300 and the first driving member, and the first driving member is used to drive the connecting member 400 to rise and fall. Among them, the first driving member can be a motor or a cylinder. After the motor is connected to the connecting member 400, the motor can drive the connecting member 400 to rise and fall, so that the connecting member 400 drives the adjusting member 300 to rise and fall. The connecting member 400 can be connected to the adjusting member 300 by screws. The screw connection has the following advantages: 1. Easy installation and disassembly, that is, the connecting member 400 and the adjusting member 300 can be quickly connected together by screw connection, and the connecting member 400 and the adjusting member 300 can also be easily disassembled, which is convenient for maintenance and replacement. 2. High connection strength, that is, the screw connection increases the friction force by increasing the contact area, thereby ensuring the strength of the connection. This connection method is strong and has a long service life, which can make the adjusting member 300 and the connecting member 400 have a high connection strength. In addition, the first driving member may be disposed below the adjusting member 300 to drive the adjusting member 300 to rise and fall.
[0038] For further information, please refer to Figure 2 In some embodiments, two connecting members 400 are provided, and the two connecting members 400 are respectively connected to the two sides of the adjusting member 300. The two connecting members 400 can be respectively connected to the opposite sides of the adjusting member 300, which can make the connecting member 400 stably connected to the adjusting member 300, so that when the connecting member 400 is driven to move by the first driving member, the connecting member 400 can stably drive the adjusting member 300 to move.
[0039] Further, it is conceivable that after the battery cell 700 is placed in the accommodating cavity 230, if the battery cell 700 is not fixed, when the adjusting member 300 drives the tab 800 and the top cover 900 to rise and fall, the tab 800 may drive the battery cell 700 to move, which may cause damage to the battery cell 700. Therefore, the battery cell 700 can be fixed by a fixing mechanism to effectively prevent the battery cell 700 from moving. Specifically, in some embodiments, the positioning device 100 further includes a fixing mechanism, which is used to fix the battery cell 700 in the accommodating cavity 230.
[0040] Further, the specific structure of the fixing mechanism is described below. Figure 2 In some embodiments, the fixing mechanism includes a fixing member 500 and a rotating member 600, the rotating member 600 is connected to the fixing member 500, the fixing member 500 is used to abut the battery cell 700, and the rotating member 600 can rotate to drive the fixing member 500 to rotate. Specifically, the accommodating cavity 230 has an opening, and the battery cell 700 can be placed in the accommodating cavity 230 from the opening. Among them, the fixing member 500 can abut on the surface of the battery cell 700 with the largest area. When placing the battery cell 700, the rotating member 600 can drive the fixing member 500 to rotate so that the fixing member 500 is not located above the accommodating cavity 230, which can facilitate the placement of the battery cell 700 in the accommodating cavity 230. After the battery cell 700 is placed in the accommodating cavity 230, the rotating member 600 can drive the fixing member 500 to rotate, so that the fixing member 500 rotates above the battery cell 700 and abuts on the surface of the battery cell 700 to fix the battery cell 700. It should be noted that the shape of the fixing member 500 can be semicircular, or the shape of the fixing member 500 can be fan-shaped. When the shape of the fixing member 500 is fan-shaped, the angle at which the rotating member 600 rotates the fixing member 500 is 90 degrees. The rotating member 600 can be a motor, and the motor is connected to the fixing member 500. The rotation of the motor can drive the fixing member 500 to rotate. In addition, the rotation of the rotating member 600 can be achieved by the motor, that is, the motor is connected to one end of the rotating member 600, and the other end of the rotating member 600 is connected to the fixing member 500. After the motor rotates, the rotating member 600 is driven to rotate, thereby driving the fixing member 500 to rotate.
[0041] Furthermore, the specific structure of the fixing mechanism is further described below. In some embodiments, the fixing mechanism also includes a second driving member, which is connected to the rotating member 600, and the second driving member is used to drive the rotating member 600 to rise and fall relative to the positioning member 200. Specifically, the second driving member can be a motor or a cylinder. When the second driving member drives the rotating member 600 to rise, the rotating member 600 and the fixing member 500 rise together, which can make the fixing member 500 leave the surface of the battery cell 700, thereby releasing the fixation of the battery cell 700. When the second driving member drives the rotating member 600 to descend, the rotating member 600 and the fixing member 500 descend together, which can make the fixing member 500 abut against the surface of the battery cell 700, thereby fixing the battery cell 700.
[0042] Furthermore, in order to protect the battery cell 700 from being damaged by the fixing member 500, a buffer layer may be provided on the fixing member 500. Specifically, in some embodiments, a buffer layer is provided on the side of the fixing member 500 facing the bottom wall of the accommodating cavity 230. That is, a buffer layer is provided on the side of the fixing member 500 facing the battery cell 700. The material of the buffer layer may be polyethylene foam plastic, which has the characteristics of low density, good flexibility, high recovery rate, etc. The material of the buffer layer may also be silicone, which has the characteristics of long service life.
[0043] For further information, please refer to Figure 2 In some embodiments, the positioning member 200 includes a plurality of abutment blocks 210 and a bottom plate 220, wherein the plurality of abutment blocks 210 are connected to the bottom plate 220, wherein the plurality of abutment blocks 210 are collectively surrounded to form a receiving cavity 230. The plurality of abutment blocks 210 can be connected to the bottom plate 220 by bolt connection, which can facilitate disassembly and assembly. The method of installing the plurality of abutment blocks 210 on the bottom plate 220 can also facilitate the staff to adjust the size of the receiving cavity 230 so that the receiving cavity 230 can adapt to battery cells 700 of different sizes.
[0044] For further information, please refer to Figure 2 In some embodiments, the abutment block 210 is provided with a guide surface 211, and the guide surface 211 is used to guide the battery cell 700. Specifically, the guide surface 211 may be an inclined surface, and the battery cell 700 may be slowly placed into the accommodation cavity 230 along the inclined surface. The design of the guide surface 211 may facilitate the placement of the battery cell 700 into the accommodation cavity 230.
[0045] In some embodiments, the welding device includes the positioning device 100 of any one of the above embodiments. The battery cell 700 is placed in the accommodating cavity 230, and the top cover 900 is placed in the placement cavity 310. Specifically, the top cover 900 is placed on one side of the battery cell 700, and the tab 800 of the battery cell 700 can be abutted against the top cover 900. After that, the adjusting member 300 is driven to rise and fall relative to the positioning member 200 by the driving mechanism. After the driving mechanism drives the adjusting member 300 to rise and fall, the top cover 900 will also rise and fall synchronously, thereby driving the tab 800 to rise and fall, which can effectively ensure that the focus of the laser is aligned with the connection between the top cover 900 and the tab 800. Specifically, the positioning device 100 can effectively ensure that the focus of the laser is aligned with the connection between the tab 800 and the top cover 900. Further, when the welding device with the positioning device 100 welds the battery cell 700 and the top cover 900, it can effectively ensure that the focus of the laser is aligned with the connection between the top cover 900 and the tab 800, so that the welding quality of the welding battery by the welding device is better.
[0046] The embodiments of the utility model are described in detail above in conjunction with the accompanying drawings, but the utility model is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the purpose of the utility model. In addition, the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.
Claims
1. A positioning device, characterized in that: include: A positioning member, provided with a receiving cavity, wherein the receiving cavity is used to receive the battery cell; An adjusting member, the adjusting member is located at one side of the positioning member, the adjusting member is provided with a placement cavity, and the placement cavity is used to place the top cover; A driving mechanism is connected to the adjusting member, and the driving mechanism is used to drive the adjusting member to rise and fall relative to the positioning member, the adjusting member drives the top cover to rise and fall, and the top cover drives the tab of the battery cell to rise and fall.
2. The positioning device according to claim 1, characterized in that: The driving mechanism comprises a connecting member and a first driving member. Two ends of the connecting member are respectively connected to the adjusting member and the first driving member. The first driving member is used to drive the connecting member to rise and fall.
3. The positioning device according to claim 2, characterized in that: The connecting members are provided with two, and the two connecting members are respectively connected to the two sides of the adjusting member.
4. The positioning device according to claim 1, characterized in that: The positioning device also includes a fixing mechanism, and the fixing mechanism is used to fix the battery core in the accommodating cavity.
5. The positioning device according to claim 4, characterized in that: The fixing mechanism comprises a fixing member and a rotating member, wherein the rotating member is connected to the fixing member, the fixing member is used to abut against the battery core, and the rotating member can rotate to drive the fixing member to rotate.
6. The positioning device according to claim 5, characterized in that: The fixing mechanism further includes a second driving member, which is connected to the rotating member and is used to drive the rotating member to rise and fall relative to the positioning member.
7. The positioning device according to claim 5, characterized in that: A buffer layer is arranged on one side of the fixing member facing the bottom wall of the accommodating cavity.
8. The positioning device according to claim 1, characterized in that: The positioning member includes a plurality of abutment blocks and a bottom plate, wherein the plurality of abutment blocks are all connected to the bottom plate, wherein the plurality of abutment blocks together surround and form the accommodating cavity.
9. The positioning device according to claim 8, characterized in that: The abutment block is provided with a guide surface, and the guide surface is used for guiding the battery core.
10. Welding equipment, characterized in that Comprising a positioning device as claimed in any one of claims 1 to 9.