Sheet stacking jig
The positioning pins that swing at asynchronous frequency assist the thin-sheet stacking fixture to solve the problem of difficult positioning of thin and light products, and achieve precise stacking and equipment simplification.
Patent Information
- Application Number
- CN202422600573.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-28
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-10-28
AI Technical Summary
Existing positioning pin methods are prone to stacking failures when stacking thin sheets due to product misalignment or insufficient static friction, especially in thin and light products where precise positioning is difficult to achieve.
The stacking of sheets is assisted by causing the positioning pins to oscillate at an asynchronous frequency. The vibration frequency and amplitude of the positioning pins are controlled by a vibration device to ensure that the sheets slide smoothly into the bottom of the positioning pins and are stacked accurately.
It enables precise stacking without the need for complex positioning equipment and high costs, is applicable to various thin films, and reduces equipment size and development costs.
Smart Images
Figure CN223488483U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a stacking fixture, and more particularly to a sheet stacking fixture in which the positioning pins have different vibration frequencies to assist in stacking. Background Technology
[0002] Stacking processes are used in many fields, such as printed circuit board (PCB) manufacturing and lithium batteries. In PCBs, stacking allows for three-dimensional vertical stacking of circuit layouts, improving overall performance and the complexity of circuit design. In lithium batteries, individual cells are stacked and then electrically connected with conductive links of appropriate polarities to significantly increase overall energy density.
[0003] Traditional stacking techniques typically employ Automated Optical Inspection (AOI) or other positioning equipment to ensure stacking accuracy. These devices are expensive and require significant space to install. Alternatively, physical or structural positioning methods are used, utilizing jigs or other auxiliary fixtures to improve accuracy. The most common method is using locating pins, which are inserted into positioning holes on the product to allow for smooth stacking. These locating pins also enhance accuracy.
[0004] However, as existing products become thinner and lighter, the aforementioned method of stacking using positioning pins will face considerable difficulties. This method relies primarily on the weight of the products themselves, with the positioning pins sliding in naturally by gravity through the positioning holes. However, as products become thinner or lighter, even slight misalignment of the positioning pins or minor errors in the product's hole positions can easily cause the products to get stuck on the positioning pins. Furthermore, even if the position of the positioning pins and the precision of the positioning holes are within tolerance, the product's own weight may be too light to overcome the static friction between the positioning holes and the positioning pins, making successful stacking impossible.
[0005] Based on the shortcomings of the prior art, this utility model proposes a sheet stacking fixture to effectively solve the above problems. Utility Model Content
[0006] The main purpose of this utility model is to provide a sheet stacking fixture that assists in sheet stacking by causing the positioning pins to oscillate at an asynchronous frequency. This not only eliminates the need for complex positioning and calibration equipment such as automatic optical inspection, but also allows for application without limiting the thickness and weight of the sheets, achieving accurate positioning and stacking, and reducing development costs and equipment size.
[0007] This utility model proposes a sheet stacking fixture, comprising: a fixed plate; at least two positioning pins disposed on the fixed plate, thereby allowing at least two sheets to be stacked on a bearing surface of the fixed plate, the sheets having a stacking surface and at least two through holes penetrating the stacking surface and corresponding to the positioning pins respectively; and at least two vibration devices respectively mounted on the bottom of the positioning pins, the vibration devices causing the positioning pins to oscillate at least two of them at an asynchronous frequency, so that the normal vector of the stacking surface of the sheet fitted onto the positioning pins through the through holes tends to be parallel to a major axis direction of the positioning pins, causing the sheet to slide relative to the positioning pins and be stacked on the bearing surface of the fixed plate.
[0008] Preferably, the fixing plate has a front side and a back side, the front side serving as the bearing surface, and the positioning pins passing through the fixing plate from the back side and protruding from the front side for stacking the sheets.
[0009] Preferably, the vibration devices are mounted on the back of the fixed plate and contact the locating pins.
[0010] Preferably, the mounting plate has multiple legs.
[0011] Preferably, these vibration devices cause the positioning pins to generate different vibration frequencies.
[0012] Preferably, the vibration frequency of these vibration devices is below 20 kHz.
[0013] Preferably, these vibration devices can control different vibration sequences.
[0014] Preferably, these vibration devices can control different vibration amplitudes.
[0015] Preferably, the sheet is a battery cell.
[0016] Preferably, when there are two locating pins, the two locating pins are arranged diagonally relative to the sheet.
[0017] Preferably, the weight of the sheet is less than the static friction between the perforation and the locating pin.
[0018] The following detailed description through specific embodiments will make it easier to understand the purpose, technical content, features and effects achieved by this utility model. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the sheet stacking fixture of this utility model.
[0020] Figure 2 This is a schematic diagram of the combination of the sheet stacking fixture and the sheet of this utility model.
[0021] Figures 3A-3C This is a schematic diagram illustrating an embodiment of the thin sheet stacking fixture of this utility model, where the thin sheet is a battery cell.
[0022] Figure 4A This is a schematic diagram illustrating an embodiment of the thin sheet stacking fixture of this utility model, where the thin sheet is a battery cell.
[0023] Figure 4B This utility model is a sheet stacking fixture. Figure 4A A schematic diagram of the cross section along AA.
[0024] Figure 5 This is a schematic diagram illustrating the action of combining the sheet stacking fixture with the sheet according to this utility model.
[0025] Figures 6A-6B This is a schematic diagram illustrating the function of the vibration device in the sheet stacking fixture of this utility model.
[0026] Figure 7 A schematic diagram showing the addition of a buffer damping pad to the sheet stacking fixture of this utility model.
[0027] Figure 8 This is a schematic diagram of the thin sheet stacking fixture and the thin sheet combined in this utility model.
[0028] Figure Labels
[0029] 10 Fixing Plate
[0030] 101 Front
[0031] 102 Back
[0032] 11. Locating pin fixing hole
[0033] 12-foot post fixing holes
[0034] 13 Buffer Damping Pads
[0035] 20 positioning pins
[0036] 21 Bottom
[0037] 30 Vibration device
[0038] 40 foot posts
[0039] 50 thin slices
[0040] 501 Front
[0041] 502 Back
[0042] 51. Perforation
[0043] 71 Positive current collector layer
[0044] 711 Positive Electrode Conduction Region
[0045] 712 Positive electrode active material coating area
[0046] 713 First Border Area
[0047] 72 Negative electrode current collector layer
[0048] 721 Negative Electrode Conduction Region
[0049] 722 Negative electrode active material coating area
[0050] 723 Second Border Area
[0051] 73 Positive Electrode Active Materials
[0052] 74. Negative Electrode Active Materials
[0053] 75 Isolation Layer
[0054] 76 Joint frame
[0055] 77 Invalid Region
[0056] 84a Positive electrode bonding frame adhesive area
[0057] 84b Negative electrode bonding frame adhesive area
[0058] L Long axis Detailed Implementation
[0059] To make the advantages, spirit, and features of this utility model more readily apparent, detailed descriptions and discussions will follow with reference to the embodiments and accompanying drawings. It should be noted that these embodiments are merely representative examples of this utility model and are not intended to limit the scope of the invention. The purpose of providing these embodiments is solely to make the disclosure of this utility model more thorough and easier to understand.
[0060] The terminology used in the various embodiments disclosed herein is for the purpose of describing particular embodiments only and is not intended to limit the various embodiments disclosed herein. Unless explicitly indicated otherwise, the singular forms used also include the plural forms. Unless otherwise specified, all terms used in this specification (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which the various embodiments disclosed herein pertain. The foregoing terms (such as those defined in a general dictionary) are to be interpreted as having the same meaning as in the context of the same technical field and are not to be interpreted as having an idealized or overly formal meaning unless explicitly defined in the various embodiments disclosed herein.
[0061] Please refer to the sheet stacking fixture disclosed in this utility model. Figure 1 It includes a fixing plate 10, at least two positioning pins 20, at least two vibration devices 30 and multiple feet 40. The fixing plate 10 has a front 101 and an opposite back 102. Its shape is mainly determined by the product to be used. It is shown in the figure as the most common rectangle. In actual application, it can be changed according to the needs. The four corners of the fixing plate 10 have feet fixing holes 12 for the corresponding feet 40 to pass through and lock. Thus, the fixing plate 10 can be supported by the feet 40.
[0062] In addition, the fixing plate 10 has multiple positioning pin fixing holes 11 at appropriate positions, the number of which corresponds to the number of positioning pins 20. As mentioned earlier, the number of positioning pin fixing holes 11 can also be adjusted as needed. Taking the rectangular fixing plate 10 shown in the figure as an example, it can be designed with four positioning pin fixing holes 11. If the positioning effect is achieved with the minimum number, the number of positioning pins 20 is at least two, and it is best to set them diagonally. Similarly, in actual applications, it can be changed according to the requirements. The front end of the positioning pin 20 has a guide bevel, which makes it easy for stacked products to slide in from the front end. The rear end has a bottom 21 with a larger cross-section, so that the positioning pin 20 can be inserted into the positioning pin fixing hole 11 from one side of the back 102 of the fixing plate 10. That is, the front end of the positioning pin 20 is inserted into the positioning pin fixing hole 11 from the back 102 of the fixing plate 10 until the bottom 21 of the rear end of the positioning pin 20 is locked into the back 102 of the fixing plate 10. Each positioning pin 20 is equipped with a corresponding vibration device 30 on its bottom 21. In other words, the vibration device 30 is installed on the back side 102 of the fixing plate 10. The vibration device 30 can generate vibration to drive the corresponding positioning pin 20 to generate corresponding vibration. Generally speaking, the vibration device 30 is commonly an eccentric motor. In practice, different devices can be replaced according to the needs, as long as they can make the positioning pin 20 vibrate. The preferred vibration frequency is below 20 kHz.
[0063] For practical applications, please refer to Figure 2A sheet stacking fixture is used to stack sheets, which can be various sheet-like structures that require stacking, such as those used in printed circuit board (PCB) manufacturing and (semi)solid-state lithium batteries. The following description uses sheet 50 as an example. Sheet 50 has a front side 501 and a back side 502. As shown in the figure, sheets 50 are stacked sequentially with their back side 502 facing down. Therefore, the back side 502 serves as the stacking surface of sheet 50, and sheet 50 is stacked on the front side 101 of the fixing plate 10. Thus, the front side 101 of the fixing plate 10 serves as its bearing surface. Sheet 50 has at least two through holes 51 that penetrate the stacking surface (back side 502) to the front side 501, and their positions correspond to the positioning pins 20. The positioning pins 20 can pass through the through holes 51 to stack sheet 50 onto the bearing surface (front side 101) of the fixing plate 10. The number of through holes 51 is at least equal to the number of positioning pins 20. The thin sheet 50 of this utility model is mainly defined as the thin sheet 50 itself being unable to overcome the static friction between the perforation 51 and the positioning pin 20 due to its own weight.
[0064] The location of the through-hole 51 in the sheet 50 must not affect the actual operation of the product. For example, if it is a printed circuit board, the through-hole 51 needs to be located in a non-circuit area. In addition, holes for fixing that are commonly found on printed circuit boards can also be used directly. On the other hand, if it is applied to a battery, taking a battery cell as an example of sheet 50, please refer to [link to relevant documentation]. Figure 3C It includes a positive electrode current collector layer 71 and a negative electrode current collector layer 72. The positive electrode active material 73, the insulating layer 75, and the negative electrode active material 74 are sequentially sandwiched between the positive electrode current collector layer 71 and the negative electrode current collector layer 72. The surrounding area is then enclosed and sealed by a bonding frame 76. Please refer to the following for further details. Figure 3A The positive electrode current collector layer 71 is roughly square and thin, with one end (the left side shown in the figure) extending outward to form a positive electrode discharge region 711. The middle part is a positive electrode active material coating region 712 for coating the positive electrode active material 73. The positive electrode active material coating region 712 is surrounded by a positive electrode bonding frame adhesion region 84a. The remaining area of the positive electrode current collector layer 71 after deducting the positive electrode active material coating region 712, the positive electrode bonding frame adhesion region 84a, and the positive electrode discharge region 711 is the first border region 713. The aforementioned isolation layer 75 can be a polymer isolation film, a polymer isolation film with oxide particles coated on its surface, a solid electrolyte, or a combination of the above types. The solid electrolyte here can be an inorganic solid electrolyte, a polymer solid electrolyte, or a polymer composite electrolyte, wherein the inorganic solid electrolyte can be an oxide type or a sulfide type, etc.
[0065] Similarly, such as Figure 3BAs shown, the negative electrode current collector layer 72 corresponds to the positive electrode current collector layer 71 and is also roughly square and thin. One end (the right side shown in the figure) extends and protrudes to form a negative electrode electrical discharge region 721, while the middle part is a negative electrode active material coating region 722 for coating with negative electrode active material 74. The negative electrode active material coating region 722 is surrounded by a negative electrode bonding frame adhesive region 84b. The remaining area of the negative electrode current collector layer 72 after deducting the negative electrode active material coating region 722, the negative electrode bonding frame adhesive region 84b and the negative electrode electrical discharge region 721 is defined as the second border region 723 in this utility model.
[0066] For the positive electrode current collector layer 71 and the negative electrode current collector layer 72, the locations of the positive electrode active material 73 and the negative electrode active material 74, together with the surrounding bonding frame 76, and the positive electrode electrical discharge region 711 and the negative electrode electrical discharge region 721, are called the effective regions. In contrast, the outer first frame region 713 and the second frame region 723 are the ineffective regions 77 of the battery cell (see...). Figure 4A , 4B In order not to affect the normal operation of the battery cells, when the battery cells are stacked as thin sheets 50, the perforations 51 are opened in the ineffective area 77, so that the battery cells can also be stacked using the thin sheet stacking fixture of this utility model.
[0067] Please refer to the following section. Figure 5 The sheet 50 is inserted into the positioning pin 20 through its perforation 51, with its back side 502 facing down as the stacking surface. If the weight of the sheet 50 is less than the static friction between the perforation 51 and the positioning pin 20, the sheet 50 will get stuck and cannot slide smoothly into the bottom of the positioning pin 20. This could be due to the sheet 50 being too light, too thin, or dimensional tolerances (including the sheet 50 itself, the position and size of its perforation 51, the position and size of the positioning pin 20, etc.), or even a slight misalignment of the positioning pin 20. Therefore, during the insertion of the sheet 50 into the positioning pin 20, the vibration device 30 continuously operates, causing the corresponding positioning pin 20 to swing, allowing the sheet 50 to slide more smoothly into the bottom.
[0068] like Figure 6A As shown, due to the various factors mentioned above, the normal vector of the stacked surface (back side 502) of the sheet 50 (as indicated by the arrow in the figure) will form an angle with the major axis L of the positioning pin 20. In this case, the sheet 50 will find it difficult to overcome the static friction between the perforation 51 and the positioning pin 20 by its own weight, meaning the sheet 50 will be stuck in this position. At this time, through the continuous action of the vibration device 30, the normal vector of the stacked surface (back side 502) of the sheet 50, which is fitted onto the positioning pin 20 through the perforation 51, can be made to tend towards the direction parallel to the major axis L of the positioning pin 20. Figure 6BAs shown, this causes the sheet 50 to slide relative to the positioning pin 20.
[0069] Please refer to the following for further details. Figure 2 , Figure 5 Since each locating pin 20 may experience the aforementioned situation, if the vibration device 30 causes the locating pins 20 to swing synchronously, it may cause the perforations 51 (four corners) of the sheet 50 to swing synchronously, reducing its effectiveness in overcoming the static friction between the perforations 51 and the locating pins 20. Therefore, it is preferable that at least two of the vibration devices 30 cause the locating pins 20 to swing asynchronously, to avoid all locating pins 20 swinging uniformly and reducing their effectiveness. Asynchronous swing can be achieved by using different vibration frequencies or amplitudes provided by the vibration devices 30, or by controlling the timing of their vibrations differently. Additionally, if we consider that the vibration device 30 may cause the fixing plate 10 to vibrate, thereby interfering with the swinging of other locating pins 20, please refer to [link to relevant documentation]. Figure 7 A buffer damping pad 13 can be added between the positioning pin fixing hole 11 and the positioning pin 20. By absorbing the swing of the positioning pin 20 acting on the fixing plate 10, the vibration device 30 can only swing for its corresponding positioning pin 20 without affecting the stability of the fixing plate 10 or disrupting the asynchronous swing of other positioning pins 20.
[0070] Please refer to the following section. Figure 8 As mentioned above, by sequentially inserting the positioning pins 20 through the perforations 51 of the sheet 50, and with the action of the vibration device 30 during the stacking process, the sheet 50 is sequentially stacked on the fixing plate 10. Although the aforementioned vibration device 30 can be applied to sheet 50 whose own weight is less than the static friction between the perforation 51 and the positioning pin 20, it can also be applied to any other stacked sheet 50, and its form is not limited.
[0071] In summary, this utility model proposes a sheet stacking fixture suitable for high-precision sheet stacking, such as for the manufacturing of printed circuit boards (PCBs), lithium batteries, or related stacked products. During the process of the sheet being fitted onto the positioning pins through perforations, at least two positioning pins continuously oscillate asynchronously, overcoming the static friction between the perforations and the positioning pins, allowing the sheet to smoothly slide into the bottom of the positioning pins and be sequentially stacked on a fixed plate. Therefore, the use of precision alignment instruments such as automatic optical inspection in existing technologies can be eliminated, reducing development costs and minimizing equipment size.
[0072] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the scope of implementation of the present utility model. The protection scope of the present utility model is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to the present utility model within its substance and protection scope, and such modifications or equivalent substitutions should also be considered to fall within the protection scope of the present utility model.
Claims
1. A sheet stacking fixture, characterized in that, Includes: One fixed plate; At least two locating pins are provided on the fixing plate, thereby allowing at least two sheets to be stacked on a bearing surface of the fixing plate. The sheets have a stacking surface and at least two through holes that penetrate the stacking surface and correspond to the locating pins respectively. as well as At least two vibration devices are respectively installed at the bottom of the locating pins. The vibration devices cause the locating pins to oscillate at least two of them at an asynchronous frequency, so that the normal vector of the stacked surface of the sheet sleeved on the locating pins through the perforations tends to be parallel to a major axis of the locating pins, so that the sheet slides relative to the locating pins and is stacked on the bearing surface of the fixed plate.
2. The sheet stacking fixture according to claim 1, characterized in that, The fixing plate has a front side and a back side, the front side serving as the bearing surface, and the positioning pins passing through the fixing plate from the back side and protruding from the front side for stacking the sheets.
3. The sheet stacking fixture according to claim 1, characterized in that, These vibration devices are mounted on the back of the fixed plate and contact the locating pins.
4. The sheet stacking fixture according to claim 1, characterized in that, The mounting plate has multiple legs.
5. The sheet stacking fixture according to claim 1, characterized in that, These vibration devices cause the positioning pins to generate different vibration frequencies.
6. The sheet stacking fixture according to claim 5, characterized in that, The vibration frequency of these vibrating devices is below 20 kHz.
7. The sheet stacking fixture according to claim 1, characterized in that, These vibration devices can control different vibration sequences.
8. The sheet stacking fixture according to claim 1, characterized in that, These vibration devices can control different vibration amplitudes.
9. The sheet stacking fixture according to claim 1, characterized in that, The thin sheet is the battery cell.
10. The sheet stacking fixture according to claim 1, characterized in that, When there are two locating pins, the two locating pins are arranged diagonally relative to the sheet.
11. The sheet stacking fixture according to claim 1, characterized in that, The weight of the thin sheet is less than the static friction between the perforation and the locating pin.