A lithium battery electrode bag making machine

Abstract

The present invention discloses a lithium battery pole piece bag making machine, including a heat sealing platform, a cutting platform, a lower diaphragm material roller, a lower diaphragm conveying device, an upper diaphragm material roller, a fixing mechanism, a traction mechanism, a pressing mechanism, a heat sealing device, a traction device and a cutting device; the lower diaphragm conveying device is used to drive the lower diaphragm to pass through the heat sealing platform and the cutting platform in sequence; the fixing mechanism is used to receive the upper diaphragm led out from the upper diaphragm material roller, and fix the upper diaphragm and the lower diaphragm together; the part of the upper diaphragm located between the fixing mechanism and the upper diaphragm material roller is formed into a pasting section; the traction mechanism pulls the pasting section to the top of the heat sealing platform; the pressing mechanism is used to make the pasting section and the lower diaphragm fit together; the heat sealing device is used to make the upper diaphragm and the lower diaphragm heat-seal and bond; the cutting device is used to cut the upper diaphragm and the lower diaphragm to form a pole piece bag. The present invention realizes the supply of the upper diaphragm and the lower diaphragm through the cooperation of the lower diaphragm conveying device, the fixing mechanism, the traction mechanism and the pressing mechanism, thereby reducing the labor intensity.

Description

Technical Field

[0001] The invention relates to a bag making machine, in particular to a lithium battery pole piece bag making machine. Background Art

[0002] At present, when a bag making machine makes electrode bags for lithium battery electrodes, it is necessary to place the lower diaphragm at a heat sealing station, place the lithium battery electrode (except the electrode ear part) on the lower diaphragm, and then use the upper diaphragm to cover the lithium battery electrode. After that, the electrode bag is formed after heat sealing and cutting. However, in the above process, the upper and lower diaphragms are usually supplied and covered with lithium battery electrodes manually, which is labor-intensive. Summary of the invention

[0003] In order to overcome the shortcomings of the prior art, the purpose of the present invention is to provide a lithium battery electrode bag making machine, which realizes the supply of upper and lower diaphragms and covering of lithium battery electrodes through the cooperation of a lower diaphragm material roller, a lower diaphragm conveying device, an upper diaphragm material roller, a fixing mechanism, a traction mechanism and a pressing mechanism, thereby reducing labor intensity.

[0004] The purpose of the present invention is achieved by the following technical solutions:

[0005] A lithium battery pole piece bag making machine, comprising

[0006] Heat sealing platform; a heat sealing station is arranged on the heat sealing platform;

[0007] The heat sealing platform and the cutting platform are arranged in sequence along a first direction;

[0008] A lower diaphragm material roller; the lower diaphragm material roller is used for winding the lower diaphragm;

[0009] A lower diaphragm conveying device; the lower diaphragm conveying device is used to receive the lower diaphragm led out by the lower diaphragm material roller, drive the lower diaphragm to be conveyed in a horizontal state along the first direction and pass through the heat sealing station and the top of the cutting platform in sequence; the part where the lower diaphragm is conveyed in a horizontal state is formed as a horizontal section, and the part of the lower diaphragm facing the heat sealing station is used to place the lithium battery pole piece;

[0010] An upper diaphragm material roller; the upper diaphragm material roller is used for winding the upper diaphragm;

[0011] An upper diaphragm supply device; the upper diaphragm supply device includes a fixing mechanism, a traction mechanism and a pressing mechanism; the fixing mechanism is used to receive the upper diaphragm led out from the upper diaphragm material roller, fix the received upper diaphragm between the heat sealing station and the cutting platform and make the received upper diaphragm fit with the horizontal section; the portion of the upper diaphragm located between the fixing mechanism and the upper diaphragm material roller is formed as a covering section for covering the lithium battery electrode sheet; the traction mechanism is used to pull the covering section in a direction away from the cutting platform so as to pull the covering section to just above the heat sealing platform; the pressing mechanism is used to push the covering section on the side of the heat sealing station away from the cutting platform so as to make the covering section fit with the horizontal section;

[0012] Heat sealing device; the heat sealing device is used to heat seal and bond the upper diaphragm and the lower diaphragm along the edge of the lithium battery pole piece on the heat sealing station; the bonding portion between the upper diaphragm and the lower diaphragm is formed as a bonding portion;

[0013] A traction device; the traction device is used to pull the lower diaphragm to transport the bonding portion to the cutting platform;

[0014] Cutting device; the cutting device is used to cut the upper diaphragm and the lower diaphragm along the edge of the bonding portion to form a pole piece bag wrapped with a lithium battery pole piece.

[0015] Furthermore, the fixing mechanism includes a pressing plate and a first lifting drive structure; the pressing plate is located above the heat sealing platform and cooperates with the heat sealing platform to clamp the upper diaphragm; the first lifting drive structure is used to drive the pressing plate to rise and fall.

[0016] Furthermore, the traction mechanism includes a traction roller, a first mounting plate and a first driving mechanism. The traction roller is pivotally connected to the first mounting plate and is used to pull the upper diaphragm. The first driving mechanism is used to drive the first mounting plate to move in a second direction opposite to the first direction.

[0017] Furthermore, the lithium battery electrode bag making machine also includes a rotary drive mechanism, and the rotary drive mechanism is used to drive the upper diaphragm material roller to rotate.

[0018] Furthermore, the pressing mechanism is mounted on the first mounting plate and is arranged in sequence with the traction roller along the second direction.

[0019] Furthermore, the lamination mechanism includes a lamination roller and a second lifting drive structure; the lamination roller is installed on the first mounting plate and is used to push the upper diaphragm downward; the second lifting drive structure is installed on the first mounting plate and is used to drive the lamination roller to rise and fall.

[0020] Furthermore, the heat sealing device is installed on the first mounting plate and is located on the side of the pressing mechanism away from the traction roller; the heat sealing device includes a third lifting drive structure, a heat sealing member and a first heating component; the first heating component is used to heat the heat sealing member; the heat sealing member has a downwardly protruding heat pressing flange, and the trajectory shape of the heat pressing flange is the same as the edge shape of the lithium battery pole piece except its pole ear; the third lifting drive structure is used to drive the heat sealing member to rise and fall.

[0021] Furthermore, the traction device includes an upper traction plate, a lower traction plate, a second mounting plate, a separation and combination drive structure and a horizontal drive structure; the upper traction plate and the lower traction plate are arranged vertically and can be mounted on the second mounting plate close to or far away from each other; the upper traction plate and the lower traction plate are used to clamp the lower diaphragm together; the separation and combination drive structure is mounted on the second mounting plate and is used to drive the upper traction plate and the lower traction plate to move closer to or away from each other; the horizontal drive structure is used to drive the second mounting plate to move in the first direction.

[0022] Furthermore, a soft pad is provided on the cutting platform; the cutting device includes a cutter, a cutter driving structure and a second heating component; the second heating component is used to heat the cutter; the cutter is directly opposite to the top of the cutting platform, and the blade of the cutter is facing the cutting platform; the trajectory shape of the blade of the cutter is the same as the edge shape of the adhesive portion; the cutter driving structure is used to drive the cutter to approach or move away from the cutting platform.

[0023] Furthermore, the lithium battery electrode bag making machine also includes a third mounting plate; the cutting platform is mounted on the third mounting plate through a buffer spring; one end of the buffer spring is fixed to the lower surface of the cutting platform, and the other end of the buffer spring is fixed to the third mounting plate; the lithium battery electrode bag making machine also includes a guide structure, the guide structure includes a vertical guide rail fixed on the third mounting plate and a guide groove opened on the cutting platform, and the guide groove and the vertical guide rail are movably plug-in matched.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The present invention adopts a lower diaphragm material roller to wind the lower diaphragm, and a lower diaphragm conveying device drives the lower diaphragm of the lower diaphragm material roller to convey along the first direction, and makes the lower diaphragm pass through the heat sealing platform and the cutting platform in sequence; the lithium battery electrode piece is placed on the lower diaphragm; and then the upper diaphragm material roller is used to wind the upper diaphragm, and a fixing mechanism fixes the upper diaphragm led out by the upper diaphragm supply device on one side of the heat sealing station, and a traction mechanism pulls the covering section of the upper diaphragm to just above the heat sealing station, and then the covering section is bonded with the lower diaphragm under the action of the pressing mechanism. In this way, the supply of the upper diaphragm and the lower diaphragm is completed, and the upper diaphragm and the lithium battery electrode piece are laminated, which reduces the labor intensity compared with manual operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the lithium battery pole piece bag making machine of the present invention;

[0027] Figure 2 It is a schematic structural diagram of the upper diaphragm supply device, the heat sealing device and the cutting device of the present invention;

[0028] Figure 3 It is a structural schematic diagram of the upper diaphragm supply device of the present invention;

[0029] Figure 4 It is a structural schematic diagram of the fixing mechanism of the present invention;

[0030] Figure 5 It is a schematic diagram of the structure of the traction mechanism, the pressing mechanism and the heat sealing device of the present invention;

[0031] Figure 6 It is a schematic structural diagram of the heat sealing device of the present invention;

[0032] Figure 7 It is a structural schematic diagram of the traction device of the present invention;

[0033] Figure 8 It is a schematic diagram of the structure of the cutting device and the cutting platform of the present invention;

[0034] In the figure: 10, heat sealing platform; 11, heat sealing station; 20, cutting platform; 30, lower diaphragm material roller; 40, lower diaphragm conveying device; 50, upper diaphragm material roller; 60, upper diaphragm supply device; 61, fixing mechanism; 611, pressing plate; 612, first lifting drive structure; 62, traction roller; 63, first mounting plate; 64, first drive mechanism; 65, pressing mechanism; 651, pressing roller; 652, second lifting drive structure; 70, heat sealing device; 71, third lifting drive structure; 7 2. heat sealing member; 721. hot pressing flange; 73. first heating assembly; 80. traction device; 81. upper traction plate; 82. lower traction plate; 83. second mounting plate; 84. horizontal drive structure; 90. cutting device; 91. cutter; 911. cutter blade; 92. cutter drive structure; 93. second heating assembly; 100. third mounting plate; 120. buffer spring; 130. vertical guide rail; 140. upper diaphragm; 141. covering section; 150. lower diaphragm; 151. horizontal section. DETAILED DESCRIPTION

[0035] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0036] like Figure 1-3 The lithium battery electrode bag making machine shown in the figure comprises a heat sealing platform 10, a cutting platform 20, a lower diaphragm material roller 30, a lower diaphragm conveying device 40, an upper diaphragm material roller 50, an upper diaphragm supply device 60, a heat sealing device 70, a traction device 80 and a cutting device 90; the heat sealing platform 10 and the cutting platform 20 are arranged along a first direction (such as Figure 1The lower diaphragm material roller 30 is used to wind the lower diaphragm 150; the lower diaphragm conveying device 40 is used to receive the lower diaphragm 150 led by the lower diaphragm material roller 30, drive the lower diaphragm 150 to be conveyed in a horizontal state along the first direction and pass over the heat sealing platform 10 and the cutting platform 20 in sequence; the portion where the lower diaphragm 150 is conveyed in a horizontal state is formed as a horizontal section 151, and the portion of the lower diaphragm 150 facing the heat sealing station 11 is used to place The upper diaphragm material roller 50 is used to wind the upper diaphragm 140; the upper diaphragm supply device 60 includes a fixing mechanism 61, a traction mechanism and a pressing mechanism 65; the fixing mechanism 61 is used to receive the upper diaphragm 140 drawn from the upper diaphragm material roller 50, fix the received upper diaphragm 140 between the heat sealing station 11 and the cutting platform 20, and make the received upper diaphragm 140 fit with the horizontal section 151; the upper diaphragm 140 is located between the fixing mechanism 61 and the upper diaphragm material roller The portion between the heat sealing station 11 and the horizontal section 151 is formed as a covering section 141 for covering the lithium battery pole piece; the traction mechanism is used to pull the covering section 141 in a direction away from the cutting platform 20, so as to pull the covering section 141 to the top of the heat sealing platform 10; the pressing mechanism 65 is used to push the covering section 141 on the side of the heat sealing station 11 away from the cutting platform 20, so that the covering section 141 is in contact with the horizontal section 151; the heat sealing device 70 is used to press the covering section 141 along the edge of the lithium battery pole piece on the heat sealing station 11. The upper diaphragm 140 and the lower diaphragm 150 are heat-sealed and bonded together; the portion where the upper diaphragm 140 and the lower diaphragm 150 are bonded forms a bonding portion, and the shape of the bonding portion is the same as the shape of the lithium battery electrode (except for its electrode ear portion); the traction device 80 is used to pull the lower diaphragm 150 to transport the bonding portion to the cutting platform 20; the cutting device 90 is used to cut the upper diaphragm 140 and the lower diaphragm 150 along the edge of the bonding portion to form a electrode bag wrapped with a lithium battery electrode.

[0037] On the basis of the above structure, when using the present lithium battery electrode bag making machine, after the lower diaphragm 150 is conveyed to the heat sealing platform 10, the lithium battery electrode is placed at the position where the lower diaphragm 150 is opposite to the heat sealing station 11, and then the upper diaphragm 140 led out from the upper diaphragm material roller 50 is fixed on one side of the heat sealing station 11 by the fixing mechanism 61 and fits the horizontal section 151 of the lower diaphragm 150, and the covering section 141 of the upper diaphragm 140 is pulled to the top of the heat sealing platform 10 under the action of the traction mechanism, and then the pressing mechanism 65 is cooperated to make the covering section 141 fit the horizontal section 151 on the other side of the heat sealing platform 10, thereby, the two ends of the covering section 141 are respectively fitted with the two sides of the horizontal section 151 located at the heat sealing station 11, and the covering section 141 is fitted with the lithium battery electrode on the lower diaphragm 150; and then the heat sealing device 70, the traction device 80 and the cutting device 90 are cooperated to complete the bag making.

[0038] like Figure 4As shown, specifically, the above-mentioned fixing mechanism 61 includes a pressing plate 611 and a first lifting drive structure 612; the pressing plate 611 is located above the heat sealing platform 10, and cooperates with the heat sealing platform 10 to clamp the upper diaphragm 140; the first lifting drive structure 612 is used to drive the pressing plate 611 to rise and fall; in this way, the upper diaphragm 140 and the lower diaphragm 150 both pass through between the heat sealing platform 10 and the pressing plate 611, and the first lifting drive structure 612 drives the pressing plate 611 to move downward, and then the heat sealing platform 10 and the pressing plate 611 can cooperate to fix the upper diaphragm 140 and the lower diaphragm 150 to fit together.

[0039] like Figure 5 As shown, further, the traction mechanism includes a traction roller 62, a first mounting plate 63 and a first driving mechanism 64. The traction roller 62 is pivotally connected to the first mounting plate 63 and is used to traction the upper diaphragm 140; the first driving mechanism 64 is used to drive the first mounting plate 63 to move in a second direction opposite to the first direction (such as Figure 1 In other words, the traction roller 62 is located between the fixing mechanism 61 and the upper diaphragm material roller 50, and is located on one side of the covering section 141; when the first driving mechanism 64 is used to drive the first mounting plate 63 to move along the second direction, the traction roller 62 moves along the second direction with the first mounting plate 63, so that the upper diaphragm 140 is pulled to the top of the heat sealing station 11 by the pulling of the traction roller 62. The traction by the traction roller 62 and the pivot connection of the traction roller 62 can reduce the friction with the upper diaphragm 140 and avoid damage to the upper diaphragm 140.

[0040] The first driving mechanism 64 may adopt a structure in which an existing linear motor, a cylinder, a lead screw and a lead screw nut cooperate.

[0041] In order to ensure that the upper diaphragm 140 is in a tensioned state during the process of pulling the upper diaphragm 140, and thus the upper diaphragm 140 is evenly covered on the lithium battery electrode, preferably, the lithium battery electrode bag making machine also includes a rotary drive mechanism, which is used to drive the upper diaphragm material roller 50 to rotate; in this way, the covering section 141 is firstly put in a tensioned state, and then the speed at which the upper diaphragm material roller 50 is driven to rotate by the rotary drive mechanism can be controlled according to the driving speed of the first drive mechanism 64, and then the speed at which the upper diaphragm material roller 50 releases the upper diaphragm 140 can be controlled, so that the release length of the upper diaphragm 140 per unit time and the distance moved by the upper diaphragm 140 are kept relatively consistent, thereby ensuring that the covering section 141 is in a tensioned state.

[0042] like Figure 5As shown, preferably, the laminating mechanism 65 is installed on the first mounting plate 63, so that the laminating roller 651 and the traction roller 62 share the first driving mechanism 64, and there is no need to set up an additional power mechanism, thereby saving energy; furthermore, the laminating mechanism 65 and the traction roller 62 are arranged in sequence along the second direction, which can ensure that when the traction roller 62 pulls the covering section 141 to the heat sealing station 11, the laminating roller 651 can be above the covering section 141, thereby ensuring smooth traction and laminating operations.

[0043] like Figure 2-3 and Figure 5 As shown, specifically, the laminating mechanism 65 includes a laminating roller 651 and a second lifting drive structure 652; the laminating roller 651 is installed on the first mounting plate 63 and is used to push the upper diaphragm 140 downward; the second lifting drive structure 652 is installed on the first mounting plate 63 and is used to drive the laminating roller 651 to rise and fall; at this time, the fixing mechanism 61 will fit the received upper diaphragm 140 with one side of the lower diaphragm 150, and at the same time, the laminating roller 651 moves with the first mounting plate 63 to the other side of the hot pressing station (that is, the laminating roller 651 is as shown in FIG. Figure 2 Move the position shown to Figure 3 The pressing roller 651 is then driven by the second lifting drive structure 652 to move downward to push the covering section 141, and the covering section 141 of the upper diaphragm 140 is fitted with the lower diaphragm 150, thereby achieving the fitting of the covering section 141 with the lithium battery electrode located on the lower diaphragm 150.

[0044] like Figure 5-6As shown, further, the heat sealing device 70 is installed on the first mounting plate 63 and is located on the side of the pressing mechanism 65 away from the traction roller 62; therefore, after the upper diaphragm 140 is attached to the lithium battery pole piece, the heat sealing operation can be smoothly implemented; specifically, the heat sealing device 70 includes a third lifting drive structure 71, a heat sealing member 72 and a first heating assembly 73; the first heating assembly 73 is used to heat the heat sealing member 72; the heat sealing member 72 can be a heat sealing seat, a heat sealing shell, etc., and the heat sealing member 72 has a downwardly protruding heat pressing flange 721, and the trajectory shape of the heat pressing flange 721 is the same as the edge shape of the lithium battery pole piece except for its pole ear, and the shape size of the heat pressing flange 721 is larger than the size of the edge shape of the pole piece, so as to achieve the heat pressing flange 7 21 matching cover is arranged outside the lithium battery pole piece; the third lifting drive structure 71 is used to drive the heat sealing member 72 to rise and fall; when in use, the first driving mechanism 64 drives the first mounting plate 63 to move, and makes the heat pressing flange 721 face the lithium battery pole piece, and the first heating component 73 heats the heat sealing member 72. Therefore, the heat pressing flange 721 is heated and heated, and cooperates with the third lifting drive structure 71 to drive the heat sealing member 72 to move toward the heat sealing station 11. Then, the heat pressing flange 721 fits with the upper diaphragm 140, and under the action of the third lifting drive structure 71, the lower diaphragm 150 is squeezed downward. At this time, the hot melting of the heat pressing flange 721 is realized at one time to bond the upper diaphragm 140 and the lower diaphragm 150 along the edge of the lithium battery pole piece, saving bonding time.

[0045] like Figure 7 As shown, the traction device 80 includes an upper traction plate 81, a lower traction plate 82, a second mounting plate 83, a separation and combination driving structure and a horizontal driving structure 84; the upper traction plate 81 and the lower traction plate 82 are arranged vertically and can be mounted on the second mounting plate 83 close to or far away from each other; the upper traction plate 81 and the lower traction plate 82 cooperate to clamp the lower diaphragm 150; the separation and combination driving structure is mounted on the second mounting plate 83, and is used to drive the upper traction plate 81 and the lower traction plate 82 to move closer to or away from each other; the horizontal driving structure 84 is used to drive the second mounting plate 83 to move in the first direction.

[0046] On the basis of the above structure, when in use, the lower diaphragm 150 passes between the upper traction plate 81 and the lower traction plate 82. When it is necessary to pull the lower diaphragm 150, the split-and-combined driving structure is used to drive the upper traction plate 81 and the lower traction plate 82 to approach each other to clamp the lower diaphragm 150. Then the horizontal driving structure 84 drives the second mounting plate 83 to move in the first direction. The second mounting plate 83 links the upper traction plate 81 and the lower traction plate 82 to move in the first direction. Under the clamping of the upper traction plate 81 and the lower traction plate 82, the lower diaphragm 150 is pulled to move in the first direction. In actual application, the upper traction plate 81 and the lower traction plate 82 can be arranged between the heat sealing platform 10 and the cutting platform 20. At this time, the lower diaphragm 150 has not been cut by the cutting device 90, but has a larger contact area with the upper traction plate 81 and the lower traction plate 82, thereby increasing the friction area and making the traction of the traction device 80 more stable.

[0047] The above-mentioned upper traction plate 81 and lower traction plate 82 can be arranged in the following ways: Method 1: both the upper traction plate 81 and the lower traction plate 82 can move up and down, and accordingly, the separation and combination driving structure includes two cylinders that respectively drive the upper traction plate 81 and the lower traction plate 82 to move vertically; Method 2: the upper traction plate 81 is fixedly installed, and the lower traction plate 82 is movably installed, and accordingly, the separation and combination driving structure includes a cylinder that drives the lower traction plate 82 to move vertically; Method 3: the lower traction plate 82 is fixedly installed, and the upper traction plate 81 is movably installed, and accordingly, the separation and combination driving structure includes a cylinder that drives the upper traction plate 81 to move vertically.

[0048] The above-mentioned horizontal driving structure 84 can adopt the structure of the existing linear motor, cylinder, lead screw and lead screw nut.

[0049] like Figure 8 As shown, further, a soft pad is provided on the cutting platform 20, and the soft pad can be made of high temperature resistant material, which can be a high temperature resistant rubber pad, a silicone pad, etc.; the cutting device 90 includes a cutter 91, a cutter driving structure 92 and a second heating component 93; the second heating component 93 is used to heat the cutter 91; the cutter 91 is directly above the cutting platform 20, and the blade 911 of the cutter is facing the cutting platform 20; the trajectory shape of the blade 911 of the cutter is the same as the edge shape of the bonding part, and the trajectory shape size of the blade 911 of the cutter is larger than the edge shape size of the bonding part, so as to ensure that the cutter 91 is matched with the cover arranged outside the bonding part; the cutter driving structure 92 is used to drive the cutter 91 to approach or move away from the cutting platform 20.

[0050] On the basis of the above structure, when in use, the second heating component 93 heats the cutter 91, and the cutter driving structure 92 drives the cutter 91 to move toward the cutting platform 20, and makes the cutter blade 911 continue to move downward after hitting the upper diaphragm 140. At this time, the cutter blade 911 sinks into the soft cushion. In this way, under the thermal cutting of the cutter blade 911, the upper diaphragm 140 and the lower diaphragm 150 are cut off at one time along the edge of the bonding part.

[0051] Furthermore, in order to prevent the upper diaphragm 140 and the lower diaphragm 150 from retracting when the cutter 91 cuts the upper diaphragm 140 and the lower diaphragm 150, a tensioning structure may be provided, and the tensioning structure and the traction device 80 respectively fix the lower diaphragm 150 on both sides of the cutting platform 20. The tensioning structure may be a clamp, a manipulator, etc.

[0052] Furthermore, the lithium battery pole piece bag making machine also includes a third mounting plate 100; the cutting platform 20 is mounted on the third mounting plate 100 by a buffer spring 120; one end of the buffer spring 120 is fixed to the lower surface of the cutting platform 20, and the other end of the buffer spring 120 is fixed to the third mounting plate 100; in this way, the buffer spring 120 can play a buffering role, which can prevent the cutter 91 from being strongly impacted with the cutting platform 20 when the cutter driving structure 92 drives the cutter 91 to descend too fast, thereby causing damage to the cutter 91 or the cutting platform 20; further, the lithium battery pole piece bag making machine also includes a guide structure, which includes a vertical guide rail 130 fixed on the third mounting plate 100 and a guide groove provided on the cutting platform 20, and the guide groove and the vertical guide rail 130 are movably plugged in cooperation; in this way, the movement direction of the cutting platform 20 is guided by the cooperation of the guide structure, and when the buffer spring 120 is used to install the cutting platform 20, the cutting platform 20 is prevented from shaking left and right, thereby affecting the accuracy of cutting.

[0053] It should be noted that the first lifting drive structure 612, the second lifting drive structure 652, the third lifting drive structure 71, and the horizontal drive structure 84 can all adopt the existing structure of linear motors, cylinders, screws and screw nuts.

[0054] The above-mentioned lower diaphragm conveying device 40 can adopt the following structure. The lower diaphragm conveying device 40 includes a winding roller, a rotating motor and multiple guide rollers. The multiple guide rollers are arranged on opposite sides of the heat sealing platform 10 and opposite sides of the cutting platform 20. The top end surface of the guide roller, the upper surface of the heat sealing platform 10 and the upper surface of the cutting platform 20 are all flush. The guide roller is used to receive the lower diaphragm 150 led out from the lower diaphragm material roller 30; the winding roller is used to receive the lower diaphragm 150 led out from the guide roller located on the side of the cutting platform 20 away from the heat sealing platform 10, and the rotating motor drives the winding roller to rotate.

[0055] The first heating component 73 and the second heating component 93 mentioned above can both adopt existing heating wires, heating tubes, etc.

[0056] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A lithium battery pole piece bag making machine, characterized in that: include Heat sealing platform; a heat sealing station is arranged on the heat sealing platform; The heat sealing platform and the cutting platform are arranged in sequence along a first direction; A lower diaphragm material roller; the lower diaphragm material roller is used for winding the lower diaphragm; A lower diaphragm conveying device; the lower diaphragm conveying device is used to receive the lower diaphragm led out by the lower diaphragm material roller, drive the lower diaphragm to be conveyed in a horizontal state along the first direction and pass through the heat sealing station and the top of the cutting platform in sequence; The portion where the lower diaphragm is transported in a horizontal state forms a horizontal section, and the portion of the lower diaphragm facing the heat sealing station is used for placing the lithium battery pole piece; An upper diaphragm material roller; the upper diaphragm material roller is used for winding the upper diaphragm; An upper diaphragm supply device; the upper diaphragm supply device comprises a fixing mechanism, a traction mechanism and a pressing mechanism; the fixing mechanism is used to receive the upper diaphragm drawn from the upper diaphragm material roller, fix the received upper diaphragm between the heat sealing station and the cutting platform, and make the received upper diaphragm fit with the horizontal section; The portion of the upper diaphragm located between the fixing mechanism and the upper diaphragm material roller is formed as a covering section for covering the lithium battery pole piece; the traction mechanism is used to pull the covering section in a direction away from the cutting platform, so as to pull the covering section to the top of the heat sealing platform; the pressing mechanism is used to push the covering section on the side of the heat sealing station away from the cutting platform, so as to make the covering section fit with the horizontal section; Heat sealing device; The heat sealing device is used to heat-seal and bond the upper diaphragm and the lower diaphragm along the edge of the lithium battery pole piece on the heat sealing station; the bonding portion between the upper diaphragm and the lower diaphragm is formed as a bonding portion; A traction device; the traction device is used to pull the lower diaphragm to transport the bonding portion to the cutting platform; Cutting device; The cutting device is used to cut the upper diaphragm and the lower diaphragm along the edge of the bonding portion to form a pole piece bag wrapped with a lithium battery pole piece; The fixing mechanism includes a pressing plate and a first lifting drive structure; the pressing plate is located above the heat sealing platform and cooperates with the heat sealing platform to clamp the upper diaphragm; the first lifting drive structure is used to drive the pressing plate to rise and fall; The traction mechanism comprises a traction roller, a first mounting plate and a first driving mechanism, wherein the traction roller is pivotally connected to the first mounting plate and is used to pull the upper diaphragm; the first driving mechanism is used to drive the first mounting plate to move in a second direction opposite to the first direction; The pressing mechanism is mounted on the first mounting plate and is arranged in sequence with the traction roller along the second direction; The laminating mechanism includes a laminating roller and a second lifting drive structure; the laminating roller is mounted on the first mounting plate and is used to push the upper diaphragm downward; the second lifting drive structure is mounted on the first mounting plate and is used to drive the laminating roller to rise and fall.

2. The lithium battery pole piece bag making machine according to claim 1, characterized in that: The lithium battery pole piece bag making machine also includes a rotary drive mechanism, and the rotary drive mechanism is used to drive the upper diaphragm material roller to rotate.

3. The lithium battery pole piece bag making machine according to claim 1, characterized in that: The heat sealing device is installed on the first mounting plate and is located on the side of the pressing mechanism away from the traction roller; the heat sealing device includes a third lifting drive structure, a heat sealing member and a first heating assembly; the first heating assembly is used to heat the heat sealing member; the heat sealing member has a downwardly protruding heat pressing flange, and the trajectory shape of the heat pressing flange is the same as the edge shape of the lithium battery pole piece except its pole ear; the third lifting drive structure is used to drive the heat sealing member to rise and fall.

4. The lithium battery pole piece bag making machine according to claim 1, characterized in that: The traction device includes an upper traction plate, a lower traction plate, a second mounting plate, a separation and combination driving structure and a horizontal driving structure; the upper traction plate and the lower traction plate are arranged vertically and can be mounted on the second mounting plate close to or far away from each other; the upper traction plate and the lower traction plate are used to clamp the lower diaphragm together; the separation and combination driving structure is mounted on the second mounting plate and is used to drive the upper traction plate and the lower traction plate to move closer to or away from each other; the horizontal driving structure is used to drive the second mounting plate to move in the first direction.

5. The lithium battery pole piece bag making machine according to claim 1, characterized in that: The cutting platform is provided with a soft cushion; the cutting device comprises a cutter, a cutter driving structure and a second heating component; the second heating component is used to heat the cutter; The cutter is directly opposite to the cutting platform, and the blade of the cutter faces the cutting platform; the track shape of the blade of the cutter is the same as the edge shape of the bonding portion; The cutter driving structure is used to drive the cutter to approach or move away from the cutting platform.

6. The lithium battery pole piece bag making machine according to claim 5, characterized in that: The lithium battery electrode bag making machine also includes a third mounting plate; the cutting platform is mounted on the third mounting plate via a buffer spring; one end of the buffer spring is fixed to the lower surface of the cutting platform, and the other end of the buffer spring is fixed to the third mounting plate; the lithium battery electrode bag making machine also includes a guide structure, the guide structure includes a vertical guide rail fixed to the third mounting plate and a guide groove provided on the cutting platform, the guide groove and the vertical guide rail being movably plug-in compatible.

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