Pole piece positioning device, winding mechanism and sheet manufacturing and winding integrated machine

Abstract

The utility model provides a kind of pole piece positioning device, for the winding mechanism of lithium battery manufacturing, pole piece positioning device includes bottom plate, driving mechanism, positioning assembly and adjusting part, bottom plate is fixedly opposite with adjusting part, driving mechanism is installed in bottom plate, the driving end of driving mechanism is connected with positioning assembly, positioning assembly is equipped with bearing surface, bearing surface is used to place pole piece, adjusting part is equipped in the side of bearing surface;Driving mechanism can drive the positioning assembly that has carried pole piece to move towards the direction close to adjusting part, the edge of pole piece and the side of adjusting part contact after completing the positioning of pole piece;When the pole piece after positioning enters next process, driving mechanism drives positioning assembly to move towards the direction away from adjusting part to reset.The pole piece positioning device of the utility model can position the pole piece made by tablet-making part, to provide pole piece for winding part, its structure is simple, and cost is low.The utility model is also related to a kind of winding mechanism and tablet-making winding integrated machine.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery manufacturing technology, and in particular to an electrode positioning device, a winding mechanism, and an integrated electrode winding machine. Background Technology

[0002] Lithium-ion batteries are a new generation of high-performance, green, and high-energy batteries, and have become one of the key areas of high-tech development. Lithium-ion batteries have the following characteristics: high voltage, high capacity, low power consumption, no memory effect, no pollution, small size, low internal resistance, low self-discharge, and high cycle life. In recent years, the lithium-ion battery manufacturing industry has developed rapidly, and the requirements for the process quality of battery core manufacturing have been continuously increasing.

[0003] The manufacturing of lithium-ion batteries involves two parts: electrode preparation and winding. The electrode preparation part rolls electrode sheets into individual positive and negative electrodes. The winding part uses a winding needle mechanism to wind the positive and negative electrodes and a separator to form a battery cell. However, existing integrated electrode preparation and winding machines cut the electrodes after winding. The cutting position varies depending on the electrode length, resulting in a floating cutting mechanism that is complex and expensive. Therefore, there is a need for a simple, low-cost connection device to link the electrode preparation and winding parts, enabling automated connection without the need for a floating cutting mechanism. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide an electrode positioning device, which is located between the electrode forming part and the winding part. It can position the electrode produced by the electrode forming part to provide an electrode for the winding part. It has a simple structure and low cost.

[0005] This utility model provides an electrode positioning device for a winding mechanism in lithium battery manufacturing. It includes a base plate, a drive mechanism, a positioning component, and an adjusting component. The base plate and the adjusting component are fixed relative to each other. The drive mechanism is mounted on the base plate, and its drive end is connected to the positioning component. The positioning component has a bearing surface for placing the electrode. The adjusting component is located on one side of the bearing surface. The drive mechanism can drive the positioning component, which carries the electrode, to move closer to the adjusting component. The electrode is positioned after its edge contacts the side of the adjusting component. When the positioned electrode enters the next process, the drive mechanism drives the positioning component to move away from the adjusting component to reset it.

[0006] In one embodiment, the positioning component includes a positioning plate, the bearing surface is disposed on the positioning plate, and at least one first clearance groove is provided on the side of the positioning plate near the adjusting member. The first clearance groove is disposed along the driving direction of the driving mechanism, and at least one of the adjusting members is correspondingly inserted into the first clearance groove. When the positioning plate is driven, the adjusting member avoids the movement of the positioning plate by means of the first clearance groove.

[0007] In one embodiment, at least one of the adjusting members has its upper end connected to a fixed plate. The electrode positioning device includes an adjusting assembly, which includes an adjusting screw. One end of the adjusting screw is connected to the base plate, and the other end of the adjusting screw is threadedly connected to an adjusting member. Rotating the adjusting screw can cause the adjusting member to move along the length direction of the adjusting member to adjust the width of the bearing surface.

[0008] The lower end of at least one of the adjusting members is connected to a fixed plate; the electrode positioning device includes an adjusting assembly, the adjusting assembly includes an adjusting screw, one end of the adjusting screw is connected to the base plate, and the other end of the adjusting screw is threadedly connected to the fixed plate. Rotating the adjusting screw can cause the fixed plate to drive the adjusting member to move along the length direction of the adjusting screw, so as to adjust the width of the bearing surface.

[0009] In one embodiment, the positioning component includes a positioning plate and a connecting plate, the bearing surface is disposed on the positioning plate, one end of the connecting plate is connected to the positioning plate, and the other end of the connecting plate is connected to the driving end of the driving mechanism.

[0010] In one embodiment, the adjustment assembly further includes at least two guide rods and at least two bearings. At least two of the adjustment members or the fixing plate are provided with shaft holes. Each bearing is disposed in each shaft hole. One end of each guide rod is connected to the base plate, and the other end of each guide rod passes through each bearing.

[0011] In one embodiment, the adjustment assembly further includes at least two sets of first sliding members, the two sets of first sliding members being respectively disposed on both sides of the adjustment screw, and each first sliding member being connected between the positioning plate of the positioning assembly and the base plate.

[0012] In one embodiment, the first sliding member includes a first slide rail and a first slider, the first slider being slidably connected to the first slide rail, the first slide rail being fixedly connected to the base plate, and the positioning plate being connected to the first slider.

[0013] In one embodiment, the electrode positioning device further includes a base and at least two sets of second sliding members. The adjustment component is connected to the base, and the two sets of second sliding members are spaced apart. Each second sliding member is connected between the base plate and the base, and the base plate can move on the base via the second sliding members.

[0014] This utility model also relates to a winding system, including a panel and the aforementioned electrode positioning device, wherein the base of the electrode positioning device is fixedly connected to the panel.

[0015] This utility model also relates to a film making and winding integrated machine, including a film making system and the winding system described above.

[0016] The electrode positioning device of this utility model fixes the driving mechanism on the adjustment component. The driving end of the driving mechanism is connected to the positioning component. The positioning component is provided with a bearing surface. The driving mechanism drives the positioning component to move towards or away from the adjustment component to position the electrode on the bearing surface. Its structure is simple. The electrode positioning device realizes the automatic positioning of the electrode, improves the work efficiency, and saves the time of lithium battery sheet winding. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the electrode positioning device according to the first embodiment of this utility model.

[0019] Figure 2 This is a schematic diagram of the structure of the electrode positioning device according to the first embodiment of the present invention, after the driving mechanism drives the positioning component to move.

[0020] Figure 3 This is a structural schematic diagram of the electrode positioning device according to the first embodiment of this utility model from another perspective.

[0021] Figure 4 This is a partially disassembled structural diagram of the electrode positioning device according to the first embodiment of this utility model.

[0022] Figure 5 This is a partial structural schematic diagram of the winding mechanism according to the first embodiment of this utility model.

[0023] Figure 6 This is a partially disassembled structural diagram of the electrode positioning device according to the second embodiment of this utility model.

[0024] Reference numerals: Electrode positioning device - 10; First clearance groove - 101; Shaft hole - 102; Groove - 103; Second clearance groove - 104; Base - 11; Adjustment assembly - 12; Adjustment plate - 121; Base plate - 122; First surface - 1221; Second surface - 1222; First side - 1223; First fixing part - 1224; Second fixing part - 1225; Adjusting component - 123; Adjusting screw - 124; Guide rod - 126; First sliding component - 128; First slider - 1281; First slide rail - 1282; Drive mechanism - 13; Positioning assembly - 14; Bearing surface - 14a; Positioning plate - 141; Connecting plate - 142; Second sliding component - 15; Second slider - 151; Second slide rail - 152; Panel - 21; Guide plate assembly - 22; Connecting rod - 23. Detailed Implementation

[0025] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of this utility model. Based on the description of this utility model, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this utility model.

[0026] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0027] The terms “upper,” “lower,” “left,” “right,” “front,” “back,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of description and simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] The terms “first,” “second,” “third,” etc., are used merely to distinguish elements with similar properties, not to indicate or imply relative importance or a specific order.

[0029] The terms “include,” “comprising,” or any other variation thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.

[0030] The integrated sheet-making and winding machine is a key core equipment in lithium battery manufacturing. It integrates the sheet-making and winding processes into one machine. Therefore, the integrated sheet-making and winding machine includes a sheet-making mechanism and a winding mechanism. The sheet-making mechanism includes (1) unwinding: receiving the rolled positive electrode sheet, negative electrode sheet and separator from the previous process (coating, rolling, slitting); (2) tension control: accurately controlling the tension of the electrode sheet and separator to ensure that the material is flat, wrinkle-free and free from stretching deformation, which is crucial for the accuracy of subsequent winding; (3) correction: using sensors (such as CCD vision system) to correct deviations. Real-time detection of the edge position of the electrode and separator, and automatic adjustment to ensure that they are always aligned and do not deviate: (4) Electrode tab welding or adhesive application: welding or applying conductive electrode tabs (battery lead-out terminals) to the positive and negative electrode sheets; (5) Adhesive application / termination tape application: applying tape to fix the start and end positions of the winding; (6) Electrode dust removal: removing dust particles from the surface of the electrode sheets to prevent internal short circuits; (7) Electrode cutting / punching: precisely cutting the continuous electrode sheets to the designed length (for square battery winding), or punching them into specific shapes (such as cylindrical batteries sometimes being cut to a specific width). The winding mechanism includes an electrode positioning device 10, the base 11 of which is fixedly connected to the panel 21. The electrode positioning device 10 is used to position the electrode sheets to achieve consistent positioning of each electrode sheet. The positioned electrode sheets are transported to the next process by a secondary material feeding device. One or two electrode positioning devices 10 can be set.

[0031] First Embodiment

[0032] like Figures 1 to 4 As shown, the electrode positioning device 10 includes a base plate 122, a drive mechanism 13, a positioning component 14, and an adjusting member 123. The base plate 122 and the adjusting member 123 are fixed relative to each other. The drive mechanism 13 is mounted on the base plate 122, and its drive end is connected to the positioning component 14. The positioning component 14 has a bearing surface 14a for placing the electrode. The width of the bearing surface 14a can be adjusted by adjusting the adjusting member 123 to accommodate electrode positioning of different widths. The drive mechanism 13 can drive the positioning component 14, which carries the electrode, to move towards the adjusting member 123. The electrode is positioned after its edge contacts the side of the adjusting member. When the positioned electrode enters the next process, the drive mechanism 13 drives the positioning component 14 to move away from the adjusting member 123 to reset it. In this embodiment, the drive mechanism 13 is preferably a drive cylinder or a drive hydraulic cylinder, or a linear reciprocating mechanism, as long as it can drive the positioning component 14 to move linearly.

[0033] The electrode positioning device 10 of this utility model has a drive mechanism 13 mounted on a base plate 122. The drive end of the drive mechanism 13 is connected to the positioning component 14. The positioning component 14 is provided with a bearing surface 14a. The drive mechanism 13 drives the positioning component 14 to move towards or away from the adjusting member 123 to position the electrode on the bearing surface 14a. Its structure is simple. The electrode positioning device 10 realizes automatic positioning of the electrode, improves work efficiency, and saves the time of lithium battery sheet winding.

[0034] Preferably, the positioning component 14 includes a positioning plate 141, a bearing surface 14a is disposed on the positioning plate 141, and at least one first clearance groove 101 is provided on the side of the positioning plate 141 near the adjusting member 123. The first clearance groove 101 is disposed along the driving direction of the driving mechanism 13, and at least one adjusting member 123 is correspondingly inserted into the first clearance groove 101. When the positioning plate 141 is driven, the adjusting member 123 avoids the movement of the positioning plate 141 by means of the first clearance groove 101, so as to avoid interference between the adjusting member 123 and the positioning plate 141 when it moves.

[0035] Preferably, the positioning assembly 14 further includes a connecting plate 142. The positioning plate 141 and the connecting plate 142 are arranged perpendicularly. One end of the connecting plate 142 is connected to the positioning plate 141, that is, the positioning plate 141 and the connecting plate 142 are fixedly connected by screws or bolts. The other end of the connecting plate 142 is connected to the driving end of the driving mechanism 13, preferably by bolts or bolts. When the driving end of the driving mechanism 13 drives the connecting plate 142 to move, the connecting plate 142 drives the positioning plate 141 to move towards or away from the adjusting member 123 to position the electrode on the bearing surface 14a. In this embodiment, the drive mechanism 13 is fixedly connected to the base plate 122 by screws or bolts. The base plate 122 includes a first surface 1221 and a second surface 1222 disposed opposite to each other. The first surface 1221 is disposed on the side of the base plate 122 near the positioning plate 141, and the second surface 1222 is disposed on the side of the base plate 122 near the base 11. The drive mechanism 13 is disposed on the second surface 1222. The base plate 122 also includes a first side surface 1223 disposed on the side of the base plate 122 near the adjusting member 123. The first side surface 1223 is provided with a groove 103, and the connecting plate 142 is disposed in the groove 103. When the drive end of the drive mechanism 13 drives the connecting plate 142 to move, the connecting plate 142 moves in the groove 103. The groove 103 provides clearance space for the connecting plate 142 to avoid interference between the connecting plate 142 and the base plate 122 when the connecting plate 142 moves.

[0036] Preferably, at least one adjusting member 123 has its upper end connected to a fixed plate 121. The electrode positioning device includes an adjusting assembly 12, which includes an adjusting screw 124. One end of the adjusting screw 124 is connected to the base plate 122, and the other end is threadedly connected to an adjusting member 123. Rotating the adjusting screw 124 allows the adjusting member 123 to move along its length to adjust the width of the bearing surface 14a. In other embodiments, two or three adjusting screws 124 may be provided as needed, but this is not a limitation.

[0037] Preferably, the base plate 122 is fixedly connected to a first fixing part 1224, and one end of the adjusting screw 124 is rotatably disposed in the first fixing part 1224. When the adjusting screw 124 is rotated, since the adjusting member 123 is threadedly connected to the adjusting screw 124, the adjusting member 123 can move along the length direction of the adjusting screw 124. The adjusting member 123 determines the width of the bearing surface 14a. Therefore, by rotating the adjusting screw 124, the width of the bearing surface 14a can be adjusted to adapt to the width requirements of different electrode sheets.

[0038] Preferably, the adjusting assembly 12 includes at least two sets of first sliding members 128. The two sets of first sliding members 128 are spaced apart along the length of the base plate 122. The two sets of first sliding members 128 are respectively disposed on both sides of the adjusting screw 124. Each first sliding member 128 is connected between the positioning plate 141 of the positioning assembly 14 and the base plate 122. Specifically, one set of first sliding members 128 includes a first slide rail 1282 and a first slider 1281. The first slider 1281 is slidably connected to the first slide rail 1282. The first slide rail 1282 is fixedly connected to the base plate 122. The fixed connection is preferably made by screws or bolts. The positioning plate 141 is connected to the first slider 1281. When the driving mechanism 13 drives the connecting plate 142 and the positioning plate 141 to move, the positioning plate 141 can move along the length of the first slide rail 1282. The cooperation between the first slider 1281 and the first slide rail 1282 makes the movement of the positioning plate 141 smoother and reduces the resistance and friction during sliding.

[0039] Preferably, the adjusting assembly 12 further includes at least two guide rods 126 and at least two bearings. At least two adjusting members 123 are provided with shaft holes 102, and each bearing is disposed within its respective shaft hole 102. One end of each guide rod 126 is connected to the base plate 122, and the other end of each guide rod 126 passes through its respective bearing. The base plate 122 is provided with two second fixing parts 1225, which are fixedly connected to the side of the base plate 122 away from the fixing plate 121. The two second fixing parts 1225 are spaced apart. One end of each guide rod 126 is fixedly connected to a second fixing part 1225. When the adjusting screw 124 is rotated to move the adjusting member 123 along the length of the adjusting screw 124, the guide rod 126 provides guidance to prevent deviation of the adjusting member 123 during movement.

[0040] Preferably, the electrode positioning device 10 further includes a base 11 and at least two sets of second sliding members 15, which are spaced apart. Each second sliding member 15 is connected between the base plate 122 and the base 11, and the base plate 122 can move on the base 11 via the second sliding members 15. Specifically, each set of second sliding members 15 includes a second slider 151 and a second slide rail 152. The second slide rail 152 is slidably connected to the second slider 151, which is fixedly connected to the base plate 122. The second slide rail 152 is fixedly connected to the base 11. When the base plate 122 moves, the cooperation between the second slider 151 and the second slide rail 152 can reduce the friction generated when the base plate 122 moves. In addition, the second sliding member 15 can also provide guidance for the movement of the base plate 122. The base plate 122 can be moved manually, or the winding mechanism is equipped with a guide plate assembly 22. The guide plate assembly 22 is connected to the base plate 122 through a connecting rod 23. The guide plate assembly 22 is provided with a guide surface, which is used to transport the electrode after it has been positioned by the electrode positioning device 10. When the guide plate assembly 22 moves, the base plate 122 and the driving mechanism 13 and positioning assembly 14 on the base plate 122 move together with the guide plate assembly 22.

[0041] Second Embodiment

[0042] like Figure 6 As shown, the electrode positioning device in this embodiment is structurally similar to the electrode positioning device in the first embodiment, except that the structure of the adjusting member 123 is different.

[0043] Specifically, at least one adjusting member 123 has its lower end connected to a fixed plate 121. The electrode positioning device includes an adjusting assembly 12, which includes an adjusting screw 124. One end of the adjusting screw 124 is connected to the base plate 122, and the other end is threadedly connected to the fixed plate 121. Rotating the adjusting screw 124 causes the fixed plate 121 to move the adjusting member 123 along the length of the adjusting screw 124, thereby adjusting the width of the bearing surface 14a. In other embodiments, two or three adjusting screws 124 may be provided as needed, but this is not a limitation.

[0044] Preferably, the adjustment assembly 12 further includes at least two guide rods 126 and at least two bearings. The fixing plate 121 is provided with shaft holes 102, and each bearing is disposed in each shaft hole 102. One end of each guide rod 126 is connected to the base plate 122, and the other end of each guide rod 126 passes through each bearing.

[0045] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. An electrode positioning device for a winding mechanism in lithium battery manufacturing, characterized in that, The device includes a base plate (122), a drive mechanism (13), a positioning component (14), and an adjusting component (123). The base plate (122) and the adjusting component (123) are fixed relative to each other. The drive mechanism (13) is mounted on the base plate (122). The drive end of the drive mechanism (13) is connected to the positioning component (14). The positioning component (14) has a bearing surface (14a) for placing the electrode sheet. The adjusting component (123) is located on one side of the bearing surface. The drive mechanism (13) can drive the positioning component (14) carrying the electrode sheet to move towards the adjusting component (123). After the edge of the electrode sheet contacts the side of the adjusting component (123), the electrode sheet is positioned. When the positioned electrode sheet enters the next process, the drive mechanism (13) drives the positioning component (14) to move away from the adjusting component (123) to reset.

2. The electrode positioning device as described in claim 1, characterized in that, The positioning component (14) includes a positioning plate (141), and the bearing surface (14a) is disposed on the positioning plate (141). At least one first clearance groove (101) is provided on the side of the positioning plate (141) near the adjusting member (123). The first clearance groove (101) is disposed along the driving direction of the driving mechanism (13). At least one adjusting member (123) is correspondingly inserted into the first clearance groove (101). When the positioning plate (141) is driven, the adjusting member (123) avoids the movement of the positioning plate (141) by means of the first clearance groove (101).

3. The electrode positioning device as described in claim 2, characterized in that, At least one of the adjusting members (123) is connected to a fixed plate (121) at its upper end. The electrode positioning device also includes an adjusting assembly (12). The adjusting assembly (12) includes an adjusting screw (124). One end of the adjusting screw (124) is connected to the base plate (122), and the other end of the adjusting screw (124) is threadedly connected to one of the adjusting members (123). Rotating the adjusting screw (124) can cause the adjusting member (123) to move along the length direction of the adjusting screw (124) to adjust the bearing width of the bearing surface (14a). A fixed plate (121) is connected to the lower end of at least one of the adjusting members (123); the electrode positioning device further includes an adjusting assembly (12), the adjusting assembly (12) includes an adjusting screw (124), one end of the adjusting screw (124) is connected to the base plate (122), and the other end of the adjusting screw (124) is threadedly connected to the fixed plate (121). Rotating the adjusting screw (124) can cause the fixed plate (121) to drive the adjusting member (123) to move along the length direction of the adjusting screw (124) to adjust the bearing width of the bearing surface (14a).

4. The electrode positioning device as described in claim 1, characterized in that, The positioning component (14) includes a positioning plate (141) and a connecting plate (142). The bearing surface (14a) is provided on the positioning plate (141). One end of the connecting plate (142) is connected to the positioning plate (141), and the other end of the connecting plate (142) is connected to the driving end of the driving mechanism (13).

5. The electrode positioning device as described in claim 3, characterized in that, The adjustment assembly (12) further includes at least two guide rods (126) and at least two bearings. At least two of the adjustment components (123) or the fixing plate (121) are provided with shaft holes (102). Each bearing is disposed in each shaft hole (102). One end of each guide rod (126) is connected to the base plate (122), and the other end of each guide rod (126) passes through each bearing.

6. The electrode positioning device as described in claim 3, characterized in that, The adjustment assembly (12) further includes at least two sets of first sliding members (128), the two sets of first sliding members (128) are respectively disposed on both sides of the adjustment screw (124), and each first sliding member (128) is connected between the positioning plate (141) of the positioning assembly (14) and the base plate (122).

7. The electrode positioning device as described in claim 6, characterized in that, The first sliding member (128) includes a first slide rail (1282) and a first slider (1281). The first slider (1281) is slidably connected to the first slide rail (1282). The first slide rail (1282) is fixedly connected to the base plate (122). The positioning plate (141) is connected to the first slider (1281).

8. The electrode positioning device as described in claim 3, characterized in that, The electrode positioning device (10) further includes a base (11) and at least two sets of second sliding members (15). The adjustment component (12) is connected to the base (11). The two sets of second sliding members (15) are spaced apart. Each second sliding member (15) is connected between the base plate (122) and the base (11). The base plate (122) can move on the base (11) through the second sliding members (15).

9. A winding mechanism, characterized in that, Includes a panel (21) and an electrode positioning device (10) according to any one of claims 1 to 8, wherein the base (11) of the electrode positioning device (10) is fixedly connected to the panel (21).

10. A film-making and winding integrated machine, characterized in that, It includes a film-making mechanism and a winding mechanism as described in claim 9.

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