Winding device with tabletting mechanism

Abstract

The invention discloses a winding device with a tabletting mechanism, which can be used for laminating pole pieces in a better fit manner when a diaphragm is wound in battery preparation. The pole piece winding device comprises a piece pressing assembly for pressing stacked pole pieces, a rail assembly for limiting the piece pressing assembly to move along a rail and a winding needle assembly which is located in the center of the piece pressing assembly and provides winding power, the rail assembly comprises a barrel-shaped rail column, and the outer surface of the rail column is provided with four layers of ring-groove-shaped rail grooves which are concaved inwards and distributed up and down; a pressing piece in the pressing piece assembly is driven by a rotating wheel to slide along a rail groove, and the rail groove fluctuates at the position where the pressing piece needs to be pressed down. And the shape of the track groove is accurately designed, so that the pressing sheet is matched for winding and can be pressed to the winding needle timely, and the pressing sheet moves stably and is high in precision.

Description

Technical Field

[0001] The invention relates to a component for making a wound battery, in particular to a winding device for winding a diaphragm and stacking pole pieces after a winding needle is fixed. Background Art

[0002] As a common battery manufacturing process, the existing technology of wound battery is relatively mature and has been widely used in many fields. The main advantages of wound battery are: high efficiency, simple process and low cost.

[0003] The technical principle of winding batteries is mainly to wind the positive electrode sheet, separator and negative electrode sheet in a certain order through a fixed winding needle and extrude them into a cylindrical or square shape. The size of the electrode sheet and the number of windings are determined by the design capacity of the battery. After winding, the battery cell will go through processes such as pre-pressing and gluing to finally form a finished battery.

[0004] Winding equipment is one of the core equipment in wound battery manufacturing. Its performance directly affects the winding quality and production efficiency of the battery cell. At present, there are many types of winding equipment on the market, such as automatic winding machines, semi-automatic winding machines, etc.

[0005] The present invention mainly designs the winding needle in the winding device and the winding assembly part used for stacking pole pieces. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a winding device with a sheet pressing mechanism, so that the battery preparation device can stack the pole pieces more closely when winding the diaphragm.

[0007] In order to solve the above technical problems, the winding device with a pressing mechanism of the present invention includes a pressing assembly for pressing the superimposed pole pieces, a track assembly for limiting the movement of the pressing assembly along the track, and a winding needle assembly located at the center of the pressing assembly and providing winding power. The pressing assembly includes four pressing pieces, and a rotating wheel connecting the pressing pieces and driving the pressing pieces to move; the track assembly includes a cylindrical track column, and the outer surface of the track column is provided with an annular track groove which is concave inward and distributed in four layers up and down; a groove column is provided at the lower part of the pressing piece, and a protrusion is provided at the bottom end of the groove column, which can be located in the track groove and slide along the track groove; the shape of the track groove is undulating.

[0008] The winding device with a sheet pressing mechanism described in the present invention has a rotating wheel in the shape of a circular wheel, including an outer ring fixing ring and an inner ring gear wheel, the gear wheel can rotate around the axis; the sheet pressing includes a block-shaped fixing part fixed to the bottom surface of the gear wheel and extending downward, and a long strip presser foot penetrating the gear wheel and movable up and down, a slide rail sliding in the vertical direction is provided on the side wall of the fixing part, the upper end of the groove column is sleeved outside the slide rail and slides along the slide rail, and the middle part of the groove column and the bottom end of the presser foot are connected by a lever; the shaft of the lever is fixed to the side of the bottom end of the fixing part close to the presser foot.

[0009] The winding device with a pressing mechanism described in the present invention has a columnar presser foot lifting column at the lower part of the presser foot, the bottom end of the presser foot lifting column is connected to one end of the lever, the top end of the presser foot lifting column is axially connected to a forward and backward moving column, the top end of the forward and backward moving column is axially connected to an elastic pressing part for pressing onto the pole piece, and the forward and backward moving column is located above the gear wheel.

[0010] The winding device with a sheet pressing mechanism described in the present invention has an inverted L-shaped fixing piece fixed on the upper surface of the gear wheel, and the L-shaped horizontal side above the L-shaped fixing piece is provided with a horizontal positioning groove extending in the horizontal direction and in the shape of a through groove, and a cam is provided on the top side of the front and rear movable column so as to be movable within the range limited by the horizontal positioning groove.

[0011] The winding device with a sheet pressing mechanism described in the present invention comprises a winding needle assembly including a long cylindrical main shaft, a motor connected to the bottom end of the main shaft, and a winding needle connected to the top end of the main shaft, wherein the winding needle is sheet-shaped; a rotating wheel and a track assembly are sleeved outside the main shaft, and the sheet pressing is pressed on the winding needle.

[0012] The winding device with a tablet pressing mechanism described in the present invention drives the tablet pressing to move in the track groove on the track column by rotating the tablet pressing assembly. The shape of the track groove is precisely designed so that the tablet pressing can cooperate with the winding and can be pressed toward the winding needle in a timely manner. The movement of the tablet pressing is stable and accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0014] Figure 1 It is a bottom perspective view of the winding device with the tablet pressing mechanism according to the present invention.

[0015] Figure 2 It is a top perspective view of the winding device with the tablet pressing mechanism described in the present invention.

[0016] Figure 3 It is a three-dimensional structural diagram of the tablet.

[0017] Figure 4 This is a three-dimensional structural diagram of the presser foot.

[0018] Figure 5 This is a structural diagram of the fixings. DETAILED DESCRIPTION

[0019] like Figures 1 to 5 The winding device with a sheet pressing mechanism of the present invention comprises a sheet pressing assembly 1 for pressing the superimposed pole pieces during the winding process, a track assembly 2 for limiting the sheet pressing assembly 1 to move along a track, and a winding needle assembly 3 located at the center of the sheet pressing assembly 1 and providing winding power.

[0020] like Figure 1As shown, the winding device with a pressing mechanism of the present invention is a component installed on a battery preparation device, wherein the most important thing is the cooperation between the pressing assembly 1 and the track assembly 2, so that the pressing assembly 11 can ensure that the pole piece and the diaphragm are closely fitted and aligned, ensuring that the pressing assembly 11 moves stably and with high precision.

[0021] The winding needle assembly 3 includes a long cylindrical main shaft 31, a motor connected to the bottom end of the main shaft 31, and a winding needle 32 connected to the top end of the main shaft 31. The winding needle 32 is sheet-shaped and used to wind the diaphragm. The motor provides power for the main shaft 31 to rotate around the axis.

[0022] like Figure 1 and Figure 2 As shown, the track assembly 2 includes a barrel-shaped track column 21 sleeved outside the main shaft 31 and a track follower wheel 22 located at the bottom of the track column 21. The track column 21 is barrel-shaped, and the track follower wheel 22 is disc-shaped and sleeved outside the main shaft 31 at one end close to the motor. A bearing is provided between the track column 21 and the track follower wheel 22, and a bearing is also provided between the track follower wheel 22 and the main shaft 31; the outer surface of the track column 21 is provided with an inwardly concave annular groove, which is distributed in four layers up and down, and cooperates with four pressing sheets 11 to form a track groove 211.

[0023] The pressing plate assembly 1 includes four pressing plates 11 , which can be pressed on two in front of the winding needle 32 and two behind it, and a rotating wheel 12 connected to the pressing plates 11 and driving the pressing plates 11 to move.

[0024] The rotating wheel 12 is a circular wheel, with the main shaft 31 as the axis, and is sleeved outside the main shaft 31, away from the motor; the rotating wheel 12 includes an outer fixed ring 121 and an inner gear wheel 122. A bearing is connected between the fixed ring 121 and the gear wheel 122, and a circle of gears 1221 is arranged outside the gear wheel 122, and the gear wheel 122 can be rotated by the gears 1221. The gear wheel 122 is connected to the track follower wheel 22 through two rods 123, so that the track follower wheel 22 rotates with the gear wheel 122.

[0025] like Figure 3 As shown, the pressing sheet 11 includes a block-shaped fixing member 111 fixed to the bottom surface of the gear wheel 122 and extending downward, and a long strip-shaped presser foot 112 penetrating the gear wheel 122 and movable up and down. A slide rail 1111 that can slide along the axis direction of the main shaft 31 is provided on the side wall of the fixing member 111. The slide rail 1111 is connected to a columnar slot column 1112. The middle part of the slot column 1112 and the bottom end of the presser foot 112 are connected by a lever 113 (as shown in FIG. Figure 3 As shown); the shaft of the lever 113 is fixed to one side of the bottom end of the fixing member 111 close to the presser foot 112.

[0026] The upper end of the slot column 1112 is sleeved on the outside of the slide rail 1111 and slides along the slide rail 1111. The lower end is provided with a protrusion located in the track groove 211. As the gear wheel 122 rotates, the bottom end of the slot column 1112 is driven to move in the track groove 211. When it reaches the part where the track groove 211 is not horizontal, the slot column 1112 moves up and down along the slide rail 1111, and drives the presser foot 112 to move up and down through the lever 113.

[0027] like Figure 4 As shown, the lower part of the presser foot 112 is a columnar presser foot lifting column 1121, and the bottom end of the presser foot lifting column 1121 is connected to one end of the lever 113 (as shown in FIG. Figure 3 As shown), the top end of the presser foot lifting column 1121 is axially connected to a front-and-rear moving column 1122, and the top end of the front-and-rear moving column 1122 is axially connected to an elastic pressing portion 1123 for pressing onto the pole piece.

[0028] The presser foot lifting column 1121 penetrates the gear wheel 122, and the front-to-back moving column 1122 is located on the gear wheel 122 and connected to the L-shaped fixing piece 114 fixed on the upper surface of the gear wheel 122; the L-shaped fixing piece 114 is an inverted L-shape, and the upper L-shaped horizontal side is provided with a horizontal positioning groove 1141 extending horizontally and in a through groove shape, and the top side of the front-to-back moving column 1122 is provided with a cam that can move within the range limited by the horizontal positioning groove 1141. The presser foot lifting column 1121 is driven by the lever 113 to move up and down, thereby driving the front-to-back moving column 1122 to move forward and backward in the horizontal positioning groove 1141, and then the elastic pressing part 1123 is pressed on the pole piece or away from the pole piece.

[0029] The four track grooves 21 are designed to bend when the four presser feet 112 need to be pressed during the winding process. The pressing time of the four presser feet 112 is determined by a track column 21, which saves power and ensures strict coordination, achieving the purpose of stable movement and high precision.

[0030] For the convenience of describing the up and down positioning directions, this patent application may be used horizontally in applications.

Claims

1. A winding device with a sheet pressing mechanism, comprising a sheet pressing assembly (1) for pressing stacked pole pieces, a track assembly (2) for limiting the sheet pressing assembly (1) to move along a track, and a winding needle assembly (3) located at the center of the sheet pressing assembly (1) and providing winding power, the sheet pressing assembly (1) comprising four sheet pressing pieces (11), and a rotating wheel (12) connected to the sheet pressing pieces (11) and driving the sheet pressing pieces (11) to move; characterized in that: The track assembly (2) comprises a cylindrical track column (21), the outer surface of the track column (21) being provided with an annular track groove (211) which is inwardly recessed and has four layers distributed up and down; a groove column (1112) is provided at the lower part of the pressing sheet (11), a protrusion is provided at the bottom end of the groove column (1112), and can be located in the track groove (211) and slide along the track groove (211); the shape of the track groove (211) is undulating.

2. The winding device with a sheet pressing mechanism according to claim 1, characterized in that: The rotating wheel (12) is in the shape of a circular wheel, comprising an outer fixed ring (121) and an inner gear wheel (122), and the gear wheel (122) can rotate around an axis; the pressing plate (11) comprises a block-shaped fixing member (111) fixed to the bottom surface of the gear wheel (122) and extending downward, and a long strip-shaped presser foot (112) penetrating the gear wheel (122) and movable up and down, a slide rail (1111) sliding in a vertical direction is provided on the side wall of the fixing member (111), the upper end of the groove column (1112) is sleeved outside the slide rail (1111) and slides along the slide rail (1111), and the middle part of the groove column (1112) and the bottom end of the presser foot (112) are connected by a lever (113); the shaft of the lever (113) is fixed to the bottom end of the fixing member (111) near the presser foot (112) on one side.

3. The winding device with a sheet pressing mechanism according to claim 2, characterized in that: The lower part of the presser foot (112) is a columnar presser foot lifting column (1121), the bottom end of the presser foot lifting column (1121) is connected to one end of the lever (113), the top end of the presser foot lifting column (1121) is axially connected to a front-and-rear moving column (1122), the top end of the front-and-rear moving column (1122) is axially connected to an elastic pressing portion (1123) for pressing onto the pole piece, and the front-and-rear moving column (1122) is located above the gear wheel (122).

4. The winding device with a sheet pressing mechanism according to claim 3, characterized in that: An inverted L-shaped L-shaped fixing piece (114) is fixed on the upper surface of the gear wheel (122); a horizontal positioning groove (1141) extending in the horizontal direction and in the shape of a through groove is provided on the L-shaped horizontal side of the upper side of the L-shaped fixing piece (114); a cam is provided on the top side of the front-rear movable column (1122) so as to be movable within the range limited by the horizontal positioning groove (1141).

5. The winding device with a sheet pressing mechanism according to claim 1, characterized in that: The winding needle assembly (3) comprises a long cylindrical main shaft (31), a motor connected to the bottom end of the main shaft (31), and a winding needle (32) connected to the top end of the main shaft (31), wherein the winding needle (32) is in the form of a sheet; the rotating wheel (12) and the track assembly (2) are sleeved outside the main shaft (31), and the pressing sheet (11) is pressed onto the winding needle (32).

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