Battery cell stacking device and battery cell production line

Abstract

The present invention provides a battery cell stacking device and a battery cell production line. The battery cell stacking device includes: a first conveying mechanism having a first material picking position; a second conveying mechanism having a second material picking position, the first and second material picking positions being spaced apart and arranged opposite each other in a first direction; a stacking table adapted to reciprocate between a first stacking station and a second stacking station along a first direction, the first stacking stations being arranged in pairs on opposite sides of the first material picking position in a second direction, and the second stacking stations being arranged in pairs on opposite sides of the second material picking position in a second direction; and a material picking assembly adapted to reciprocate between the first material picking position and the first stacking station and / or between the second material picking position and the second stacking station along a second direction, wherein the first direction and the second direction form an angle. The battery cell stacking device and battery cell production line can improve stacking efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of battery production, and in particular to a battery cell stacking device and a battery cell production line. Background Art

[0002] The basic structure of a lithium-ion battery includes a positive electrode sheet, a negative electrode sheet, and a separator between the positive and negative electrodes. Lamination is one of the ways to make a battery cell from the positive electrode sheet, the negative electrode sheet, and the separator.

[0003] Most of the existing stacking mechanisms use a stacking platform with a set of positive and negative electrode correction structures. The positive and negative electrode correction platforms are distributed on both sides of the stacking station. The upper manipulator moves back and forth left and right to alternately transfer the electrodes from the positive and negative electrode production logistics to the positive and negative electrode correction platforms, and finally transfers them to the stacking station for stacking.

[0004] In the stacking mechanism using the current stacking method, the horizontal movement stroke of the upper robot is relatively large during the stacking process. Generally, a multi-motor linear motor is used for reciprocating transport to shorten the stroke and increase the transport speed to meet the requirements, making it difficult to further improve the stacking efficiency. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defects of the prior art that the reciprocating material-taking robot has a large stroke and low stacking efficiency, thereby providing a battery cell stacking device and a battery cell production line with high stacking efficiency.

[0006] In order to solve the above problems, the present invention provides a battery cell stacking device, including: a first conveying mechanism, suitable for conveying the first electrode sheet to a first material picking position; a second conveying mechanism, suitable for conveying the second electrode sheet to a second material picking position, the first conveying mechanism and the second conveying mechanism respectively extend in the first direction and convey the first electrode sheet and the second electrode sheet towards each other, so that the first material picking position and the second material picking position are spaced apart from each other and arranged oppositely in the first direction; a stacking table, suitable for moving back and forth between the first stacking station and the second stacking station along the first direction, the first stacking station is arranged in pairs on opposite sides of the first material picking position in the second direction, and the second stacking station is arranged in pairs on opposite sides of the second material picking position in the second direction; a material picking assembly, suitable for moving back and forth between the first material picking position and the first stacking station and / or between the second material picking position and the second stacking station along the second direction; wherein, the first direction forms an angle with the second direction.

[0007] Optionally, there are two stacking platforms, and the two stacking platforms are relatively staggered in the second direction. The first material picking position and the second material picking position are both located between the two stacking platforms. The material picking assembly includes a first material picking mechanism and a second material picking mechanism. The first material picking mechanism and the second material picking mechanism are relatively arranged in the first direction, and the first material picking mechanism is arranged corresponding to the first conveying mechanism, and the second material picking mechanism is arranged corresponding to the second conveying mechanism.

[0008] Optionally, one or more stacking positions are provided on the stacking table, and the material picking assembly includes a plurality of manipulators, and the manipulators include vacuum adsorption plates.

[0009] Optionally, the lamination device further comprises: a diaphragm unwinding mechanism, suitable for laying a diaphragm on the first pole piece or the second pole piece on the lamination platform.

[0010] In order to solve the above problems, the present invention provides a battery cell production line, comprising: the above-mentioned battery cell stacking device.

[0011] Optionally, the battery cell production line also includes: a first electrode sheet rejection mechanism, which is arranged on the first conveying mechanism of the battery cell stacking device to remove waste from the first electrode sheet; and a second electrode sheet rejection mechanism, which is arranged on the second conveying mechanism of the battery cell stacking device to remove waste from the second electrode sheet.

[0012] Optionally, the first conveying mechanism and the second conveying mechanism both include: a first conveyor belt, suitable for adsorbing the first side of the electrode; a second conveyor belt, connected to the first conveyor belt, to adsorb the second side of the electrode, the first side being opposite to the second side; a third conveyor belt, connected to the second conveyor belt, to adsorb the first side of the electrode; wherein, the first electrode rejection mechanism is arranged on the second conveyor belt of the first conveying mechanism, the second electrode rejection mechanism is arranged on the second conveyor belt of the second conveying mechanism, the first material picking position is arranged on the third conveyor belt of the first conveying mechanism, and the second material picking position is arranged on the third conveyor belt of the second conveying mechanism.

[0013] Optionally, the battery cell production line also includes: a first electrode sheet cutting mechanism, suitable for cutting the first electrode sheet after the electrode tab is completed; a second electrode sheet cutting mechanism, suitable for cutting the second electrode sheet after the electrode tab is completed; wherein, the first electrode sheet cutting mechanism is arranged upstream of the feeding end of the first conveying mechanism, and the second electrode sheet cutting mechanism is arranged upstream of the feeding end of the second conveying mechanism.

[0014] Optionally, the first pole piece cutting mechanism and the second pole piece cutting mechanism both include laser cutting mechanisms.

[0015] Optionally, the battery cell production line also includes: a blanking assembly, suitable for unloading the battery cells on the stacking table of the battery cell stacking device; a battery cell correction assembly, including a hot pressing assembly, a battery cell separation assembly and a gluing assembly arranged in sequence; a blanking mechanism, suitable for transporting the battery cells that have completed hot pressing in the hot pressing assembly to the battery cell separation assembly for separation, and transporting the separated battery cells to the gluing assembly, and transporting the battery cells that have completed gluing to the blanking logistics line.

[0016] The present invention has the following advantages:

[0017] 1. By utilizing the technical solution of the present invention, a first stacking station is set corresponding to the first material picking position, and a second stacking station is set corresponding to the second material picking position. The stacking table of the stacking assembly moves back and forth between the first stacking station and the second stacking station. A reciprocating manipulator alternately grabs the first electrode at the first material picking position and grabs the second electrode at the second material picking position to load the electrode onto the stacking table on the corresponding stacking station, thereby shortening the movement stroke of the manipulator, simplifying the structure, and reducing the cost.

[0018] 2. By placing a set of conveying mechanisms in the middle, and two laminating assemblies on opposite sides of the conveying mechanisms, and the laminating tables of the laminating assemblies reciprocating, the laminating efficiency can be doubled. The set of conveying mechanisms includes a first conveying mechanism and a second conveying mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is a schematic top view of the structure of a battery cell stacking device according to one embodiment of the present invention;

[0021] Figure 2 A schematic top view of a simplified structure of a battery cell production line according to an embodiment of the present invention;

[0022] Figure 3 Schematic diagram of a top view of a battery cell production line according to an embodiment of the present invention;

[0023] Figure 4 The figure is a process flow chart of a battery cell production line according to an embodiment of the present invention.

[0024] Description of reference numerals:

[0025] 100, battery cell stacking device; 111, first material retrieving mechanism; 113, second material retrieving mechanism; 121, first stacking platform assembly; 123, second stacking platform assembly; 125, diaphragm unwinding mechanism; 1201, first stacking station; 1203, second stacking station; 1205, stacking platform; 131, first conveying mechanism; 1301, first material retrieving station; 133, second conveying mechanism; 1303, second material retrieving station; 1305, first conveyor belt; 1307, second conveyor belt; 151, first electrode sheet cutting mechanism; 153, second electrode sheet cutting mechanism; 161, first electrode sheet ear pole manufacturing mechanism; 163, second electrode sheet ear pole manufacturing mechanism; 171, first electrode sheet unwinding mechanism; 173, second electrode sheet unwinding mechanism; 181, unloading mechanism; 183, hot pressing assembly; 185, battery cell separation assembly; 187, gluing assembly; X, first direction; Y, second direction; 10, battery cell production line. DETAILED DESCRIPTION

[0026] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0027] Exemplary battery cell stacking device

[0028] like Figure 1 As shown, the battery cell stacking device 100 includes: a first conveying mechanism 131, a second conveying mechanism 133, a stacking table 1205 and a material picking assembly, the first conveying mechanism 131 is suitable for conveying the first electrode sheet to the first material picking position 1301, the second conveying mechanism 133 is suitable for conveying the second electrode sheet to the second material picking position 1303, the first conveying mechanism 131 and the second conveying mechanism 133 extend in the first direction X respectively and convey the first electrode sheet and the second electrode sheet towards each other, so that the first material picking position 1301 and the second material picking position 1303 are spaced apart from each other in the first direction X and are arranged opposite to each other. The laminating table 1205 is adapted to reciprocate along a first direction X between the first laminating station 1201 and the second laminating station 1203. The first laminating station 1201 is opposite the first material retrieving station 1301 in a second direction Y, and the second laminating station 1203 is opposite the second material retrieving station 1303 in the second direction Y. The retrieving assembly is adapted to reciprocate along the second direction Y between the first material retrieving station 1301 and the first laminating station 1201 and / or between the second material retrieving station 1303 and the second laminating station 1203. The first direction X and the second direction Y form an angle, preferably a right angle, between the first and second directions Y.

[0029] The above-mentioned lamination device includes a conveying mechanism to convey the electrode sheet to the material collection position. The conveying mechanism includes a first conveying mechanism 131 and a second conveying mechanism 133, the first conveying mechanism 131 is used to convey the first electrode sheet, and the second conveying mechanism 133 is used to convey the second electrode sheet. The first conveying mechanism 131 and the second conveying mechanism 133 are arranged opposite to each other in the first direction X, and the direction in which the first conveying mechanism 131 conveys the first electrode sheet is opposite to the direction in which the second conveying mechanism 133 conveys the second electrode sheet. Among them, the first conveying mechanism 131 can complete the deviation correction of the first electrode sheet during the transportation of the first electrode sheet, or the first conveying mechanism 131 can correct the deviation of the first electrode sheet after conveying the first electrode sheet to the first material collection position 1301, so that the first electrode sheet located at the first material collection position 1301 can wait to be collected. Similarly, the second conveying mechanism 133 can complete the correction of the second electrode sheet during the transportation of the second electrode sheet, or the second conveying mechanism 133 can correct the second electrode sheet after conveying the second electrode sheet to the second material collection position 1303, so that the second electrode sheet located at the second material collection position 1303 can wait to be collected.

[0030] The first material picking station 1301 and the second material picking station 1303 are arranged relative to each other, making the overall structure more compact. The stacking table 1205 can be slidably connected to the transverse guide rail to achieve reciprocating movement. The stacking table 1205 is used to stack the first and second electrode sheets in sequence. When the stacking table 1205 moves along the first direction X to the first stacking station 1201, the material picking assembly can grab the first electrode sheet from the first material picking station 1301 corresponding to the first stacking station 1201 and place it on the first stacking station 1201. Similarly, when the stacking table 1205 moves along the first direction X to the second stacking station 1203, the material picking assembly can grab the second electrode sheet from the second material picking station 1303 corresponding to the second stacking station 1203 and place it on the second stacking station 1203. In this way, by alternately feeding the first and second electrode sheets to the stacking table 1205 running to the first stacking station 1201, the battery cell stacking can be completed.

[0031] Since the first stacking station 1201 is opposite to the first material picking station 1301, and the second stacking station 1203 is opposite to the second material picking station 1303, the material picking component moves back and forth in a straight line in the second direction Y to the first material picking station 1301 and the first stacking station 1201, and / or the material picking component moves back and forth in a straight line in the second direction Y to the second material picking station 1303 and the second stacking station 1203. Therefore, the material picking and unloading stroke of the material picking component is short, thereby improving the stacking efficiency of the battery cell.

[0032] Furthermore, there are two stacking platforms 1205, and the two stacking platforms 1205 are relatively staggered in the second direction Y. The first material picking position 1301 and the second material picking position 1303 are both located between the two stacking platforms 1205. The material picking assembly includes a first material picking mechanism 111 and a second material picking mechanism 113. The first material picking mechanism 111 and the second material picking mechanism 113 are relatively arranged in the first direction X, and the first material picking mechanism 111 is arranged corresponding to the first conveying mechanism 131, and the second material picking mechanism 113 is arranged corresponding to the second conveying mechanism 133.

[0033] The above-mentioned stacking device includes a first stacking assembly 121 and a second stacking assembly 123. The structures and compositions of the first stacking assembly 121 and the second stacking assembly 123 are the same. The first stacking assembly 121 and the second stacking assembly 123 both include a stacking platform 1205, a first stacking station 1201 and a second stacking station 1203. The first stacking assembly 121 and the second stacking assembly 123 are arranged relative to each other in the second direction Y. The first conveying mechanism 131 and the second conveying mechanism 133 are both arranged between the first stacking assembly 121 and the second stacking assembly 123. The first material picking mechanism 111 and the second material picking mechanism 113 both include a frame. The frame of the first material picking mechanism 111 spans the first conveying mechanism 131 in the second direction Y, and the second material picking mechanism 113 spans the second conveying mechanism 133 in the second direction Y. The manipulator of the first material picking mechanism 111 can pick up the first electrode sheet from the first material picking position 1301 of the first conveying mechanism 131, and move linearly along the second direction Y to the first electrode sheet on the lamination table 1205 moved to the first lamination station 1201. Similarly, the manipulator of the second material picking mechanism 113 can pick up the second electrode sheet from the second material picking position 1303 of the second conveying mechanism 133, and move linearly along the second direction Y to the second electrode sheet on the lamination table 1205 moved to the second lamination station 1203. Since each lamination table 1205 can be stacked to form a battery cell, the stacking efficiency of the battery cell is further improved.

[0034] Furthermore, one or more stacking positions are provided on the stacking table 1205, and the material taking component includes multiple manipulators, and the manipulators include vacuum adsorption plates.

[0035] The above-mentioned vacuum adsorption plate can be used to grab the electrode or put down the electrode. Each stacking position can perform stacking operations on one battery cell. When multiple stacking positions are set on the stacking table 1205, the stacking efficiency can be further improved. Therefore, if the manipulator is required to be able to synchronously grab the same number of first electrode pieces or second electrode pieces as the number of stacking positions, the number of first electrode pieces and second electrode pieces placed at the first material picking position 1301 and the second material picking position 1303 also needs to correspond. For example, if there are two stacking positions, each manipulator needs to include at least two picking parts, and the first material picking position 1301 needs to have two first electrode pieces, and the second material picking position 1303 needs to have two second electrode pieces.

[0036] Furthermore, the lamination device 100 further includes: a diaphragm unwinding mechanism 125 , which is suitable for laying a diaphragm on the first pole piece or the second pole piece on the lamination platform 1205 .

[0037] The separator unwinding mechanism 125 is used to unwind the separator. The first electrode sheet and the second electrode sheet are respectively a positive electrode sheet and a negative electrode sheet. The positive electrode sheet can also be called a cathode sheet, and the negative electrode sheet can also be called an anode sheet.

[0038] The first conveying mechanism 131 can also correct the deviation of the first electrode sheet. By placing the first material extraction position 1301 on the first conveying mechanism 131, the first conveying mechanism 131 can correct the deviation of the first electrode sheet at the first extraction position 1301 without the need for a separate mechanism, further improving the feeding efficiency of the first electrode sheet. Similarly, the second conveying mechanism 133 can correct the deviation of the second electrode sheet. By placing the second material extraction position 1303 on the second conveying mechanism 133, the second conveying mechanism 133 can correct the deviation of the second electrode sheet at the second extraction position 1303 without the need for a separate mechanism, further improving the feeding efficiency of the second electrode sheet. As a result, the stacking efficiency is ultimately further improved.

[0039] Exemplary battery cell production line

[0040] like Figure 2 As shown, a battery cell production line includes: the above-mentioned battery cell stacking device.

[0041] The battery cell production line 10 adopts the battery cell stacking device 100 to improve the efficiency of preparing battery cells in the battery cell production line.

[0042] Further, if Figure 2 and Figure 3 As shown, the battery cell stacking device 100 also includes: a first electrode sheet rejection mechanism and a second electrode sheet rejection mechanism. The first electrode sheet rejection mechanism is arranged on the first conveying mechanism 131 of the battery cell stacking device 100 to reject waste in the first electrode sheet; the second electrode sheet rejection mechanism is arranged on the second conveying mechanism 133 of the battery cell stacking device 100 to reject waste in the second electrode sheet.

[0043] The above-mentioned first electrode rejection mechanism removes the waste on the first conveying mechanism 131, and the second electrode rejection mechanism removes the waste on the second conveying mechanism 133, which can ensure that the first electrode entering the first material extraction position 1301 and the second electrode entering the second material extraction position 1303 are both qualified products, further improving the feeding efficiency, and ultimately improving the production efficiency of the battery cell.

[0044] Furthermore, both the first conveying mechanism 131 and the second conveying mechanism 133 include: a first conveyor belt 1305, a second conveyor belt 1307, and a third conveyor belt 1309. The first conveyor belt 1305 is suitable for adsorbing the first side of the electrode. The second conveyor belt 1307 is connected to the first conveyor belt 1305 to adsorb the second side of the electrode, with the first side and the second side facing each other. The third conveyor belt 1309 is connected to the second conveyor belt 1307 to adsorb the first side of the electrode. Among them, the first electrode rejection mechanism is provided on the second conveyor belt 1307 of the first conveying mechanism 131, and the second electrode rejection mechanism is provided on the second conveyor belt 1307 of the second conveying mechanism 133. The first material extraction position 1301 is provided on the third conveyor belt 1309 of the first conveying mechanism 131, and the second material extraction position 1303 is provided on the third conveyor belt 1309 of the second conveying mechanism 133.

[0045] The first conveyor belt 1305, the second conveyor belt 1307, and the third conveyor belt 1309 all include vacuum belts to absorb the first and second electrode sheets. By arranging the first and second electrode sheet rejection mechanisms on the corresponding second conveyor belt 1307, the first and second electrode sheets entering the third conveyor belt 1309 can all be qualified.

[0046] Furthermore, if Figure 2 and Figure 3 As shown, the battery cell production line also includes: a first electrode sheet cutting mechanism 151 and a second electrode sheet cutting mechanism 153. The first electrode sheet cutting mechanism 151 is suitable for cutting the first electrode sheet after the electrode tab is produced, and the second electrode sheet cutting mechanism 153 is suitable for cutting the second electrode sheet after the electrode tab is produced. The first electrode sheet cutting mechanism 151 is arranged above the feeding end of the first conveying mechanism 131, and the second electrode sheet cutting mechanism 153 is arranged above the feeding end of the second conveying mechanism 133. The first electrode sheet cutting mechanism 151 and the second electrode sheet cutting mechanism 153 can be laser cutting mechanisms or metal die cutting mechanisms.

[0047] The above-mentioned battery cell production line also includes a first electrode sheet unwinding mechanism 171, a second electrode sheet unwinding mechanism 173, a first electrode tab manufacturing mechanism 161, a second electrode tab manufacturing mechanism 163, a first electrode sheet cutting mechanism 151 and a second electrode sheet cutting mechanism 153. The first electrode sheet is unwound by the first electrode sheet unwinding mechanism 171, and the first electrode tab manufacturing mechanism 161 manufactures electrode tabs for the first electrode sheet that is continuously unwound. After the electrode tabs are manufactured, the first electrode sheet can be cut into the first electrode sheet by the first electrode sheet cutting mechanism 151 to enter the first conveying mechanism 131 for conveying the first electrode sheet. Similarly, the first electrode sheet is unwound by the second electrode sheet unwinding mechanism 173, and the second electrode tab manufacturing mechanism 163 manufactures electrode tabs for the second electrode sheet that is continuously unwound. After the electrode tabs are manufactured, the second electrode sheet can be cut into the second electrode sheet by the second electrode sheet cutting mechanism 153 to enter the second conveying mechanism 133 for conveying the first electrode sheet. Continuously unwinding, manufacturing and cutting the electrode sheets further improves efficiency.

[0048] Furthermore, the first pole piece cutting mechanism 151 and the second pole piece cutting mechanism 153 are preferably laser cutting mechanisms.

[0049] Cutting the first pole piece or the second pole piece by the laser cutting mechanism can improve cutting efficiency and cutting quality.

[0050] like Figure 3As shown, the negative electrode material roll is continuously unwound by the second electrode sheet unwinding mechanism 173, and the second electrode tab forming mechanism 163 continuously prepares the electrode tabs. After the electrode tabs are prepared on the continuous electrode sheet, the electrode sheet is cut into individual second electrode sheets by the second electrode sheet cutting mechanism 153. The prepared single second electrode sheets are continuously conveyed by the first conveyor belt 1305. The first conveyor belt 1305 is a forward belt. On the first conveyor belt 1305, the second electrode sheets are variable in pitch. After being conveyed on the forward belt, the second electrode sheets are connected to the second conveyor belt 1307 for conveyance. The second conveyor belt 1307 is a reverse belt, and the third conveyor belt 1309 is a forward belt. The second electrode sheets are inspected for back surface defects and rejected as NG on the reverse belt. After being conveyed by the second conveyor belt 1307, the second electrode sheets are transferred to the third conveyor belt 1309 and then conveyed to the second material removal position 1303. At the same time, after being continuously unwound by the first electrode sheet unwinding mechanism 171, the positive electrode material roll is continuously prepared into electrode tabs by the first electrode tab forming mechanism 161. After the electrode tabs are prepared on the continuous electrode sheet, the first electrode sheet is cut into individual first electrode sheets by the first electrode sheet cutting mechanism 151. The prepared single first electrode sheet is continuously conveyed by the first conveyor belt 1305 of the first conveying mechanism 131. On the first conveyor belt 1305, the first electrode sheets are subjected to a variable pitch operation. After being conveyed on the first conveyor belt 1305, the first electrode sheet is connected to the second conveyor belt 1307 for conveyance. The first electrode sheet is inspected for reverse defects and the electrode sheet is rejected as NG on the second conveyor belt 1307. After being conveyed by the second conveyor belt 1307, the first electrode sheet is transferred to the third conveyor belt 1309 and then conveyed to the first material retrieving position 1301.

[0051] The first electrode is grabbed by the robot arm of the first material picking mechanism 111 and placed on the stacking table 1205 of the first stacking station 1201. The second electrode is grabbed by the robot arm of the second material picking mechanism 113 and placed on the stacking table 1205 of the second stacking station 1203. The stacking tables 1205 on both sides can perform stacking and material picking actions synchronously. When the stacking table 1205 performs reciprocating stacking motion in the conveying direction of the electrode, that is, the first direction, the diaphragm unwinding mechanism 125 also performs reciprocating folding of the diaphragm along the first direction X synchronously. The reciprocating stacking improves the efficiency of stacking.

[0052] In addition, the first material picking mechanism 111 and the second material picking mechanism 113 are not only suitable for two material separation belts, two stacking tables 1205 and two sets of diaphragm unwinding mechanisms, but the stacking method can be applicable to three, four and even N sets of mechanisms.

[0053] Furthermore, if Figure 3As shown, the battery cell production line also includes: a blanking assembly and a battery cell correction assembly. The blanking assembly is suitable for unloading the battery cells on the stacking table 1205 of the battery cell stacking device and conveying the battery cells to the battery cell correction assembly station. The battery cell correction assembly includes a hot pressing assembly 183, a battery cell separation assembly 185, a gluing assembly 187 and a blanking mechanism 181 arranged in sequence. The blanking mechanism 181 is suitable for transporting the battery cells that have completed hot pressing in the hot pressing assembly 183 to the battery cell separation assembly 185 for separation, and transporting the separated battery cells to the gluing assembly 187, and transporting the glued battery cells to the blanking logistics line.

[0054] After the above-mentioned battery cells are stacked, the unloading and picking part of the unloading assembly unloads the battery cells from the negative electrode loading position of the stacking table 1205, and the unloading assembly 181 transports the removed battery cells to the hot pressing assembly 183 for hot pressing of the battery cells and then separates the battery cells. Among them, the unloading assembly 181 can also transport the hot-pressed battery cells to the battery cell separation assembly 185 through the unloading and picking part of the unloading mechanism 189 for battery cell separation. After the battery cell separation assembly 185 separates the battery cells, the unloading and picking part of the unloading mechanism 189 takes out the battery cells and transports them to the gluing assembly 187 for battery cell side glue and QR code tape. After the battery cells are affixed with side glue and QR code tape, the unloading and picking part of the unloading mechanism 189 unloads the battery cells onto the unloading logistics line.

[0055] like Figure 4 As shown, the positive electrode can also be called the cathode sheet, and the negative electrode sheet can also be called the anode sheet.

[0056] After the cathode sheet is unwound, it enters the tail material detection, belt splicing platform, air knife dust removal, pole piece iron removal, rocker tension control, tension detection, pole piece overall correction, pole piece laser ear making, and pole piece laser cutting processes in sequence. After the pole piece laser cutting, the cathode sheet undergoes NG removal and pole piece correction. The cathode sheet that has completed pole piece correction enters the material picking mechanism for pole piece linear material separation, and then enters the corresponding stacking table 1205 for stacking.

[0057] Similarly, after the anode is unwound, it enters the tail material detection, belt splicing platform, wind knife dust removal, pole piece iron removal, rocker tension control, tension detection, pole piece overall correction, pole piece laser ear making, and pole piece laser cutting processes in sequence. After the pole piece laser cutting, the anode piece is subjected to NG removal and pole piece correction. The anode piece that has completed the pole piece correction enters the material picking mechanism for pole piece linear material separation, and then enters the corresponding stacking table 1205 for stacking.

[0058] After the stacking is completed, the battery cell is formed. The battery cell goes through the processes of battery cell cutting, battery cell hot pressing, battery cell separation, and completion of gluing and battery cell cutting in the gluing assembly, thus completing the preparation of the battery cell.

[0059] According to the above description, this application has the following advantages:

[0060] 1. A synchronous alternating loading arrangement is achieved by changing the positions of the linearly movable material taking component and the linearly movable stacking table 1205 between the first material taking position 1301, the second material taking position 1303, the first stacking station 1201 and the second stacking station 1203, thereby simplifying the material taking and stacking actions and greatly improving the production efficiency and quality.

[0061] 2. The whole machine has a simplified structure, small footprint, low cost and high efficiency;

[0062] 3. Multiple electrodes can be stacked at the same time, and the battery cell separation mechanism is used to ensure the quality of battery cell stacking, greatly improving production efficiency.

[0063] 4. The whole machine stacking process is mature and the whole process can be closed-loop controlled, which improves the quality of the battery cells.

[0064] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be configured, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0065] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0066] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0067] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A battery cell stacking device, characterized in that: include: A first conveying mechanism (131) adapted to convey the first electrode piece to a first material taking position (1301); A second conveying mechanism (133) is adapted to convey the second electrode piece to a second material taking position (1303), wherein the first conveying mechanism (131) and the second conveying mechanism (133) respectively extend in a first direction (X) and convey the first electrode piece and the second electrode piece toward each other, so that the first material taking position (1301) and the second material taking position (1303) are spaced apart from each other and arranged opposite to each other in the first direction (X); a laminating platform (1205) adapted to reciprocate between a first laminating station (1201) and a second laminating station (1203) along the first direction (X); two laminating platforms (1205) are provided, and the two laminating platforms (1205) are relatively staggered in the second direction (Y); the first laminating stations (1201) are arranged in pairs on opposite sides of the first material taking station (1301) in the second direction (Y); the second laminating stations (1203) are arranged in pairs on opposite sides of the second material taking station (1303) in the second direction (Y); and the first material taking station (1301) and the second material taking station are both located between the two laminating platforms (1205); A diaphragm unwinding mechanism (125) is suitable for laying a diaphragm on the first pole piece or the second pole piece on the lamination platform (1205), and the diaphragm unwinding mechanism (125) synchronously follows the lamination platform (1205) to perform a reciprocating diaphragm folding action along the first direction X; A material taking component is adapted to reciprocate along the second direction (Y) between the first material taking position (1301) and the first lamination station (1201) and / or between the second material taking position (1303) and the second lamination station (1203), wherein the material taking component comprises a first material taking mechanism (111) and a second material taking mechanism (113), wherein the first material taking mechanism (111) and the second material taking mechanism (113) are arranged relative to each other in the first direction (X), and the first material taking mechanism (111) corresponds to the first conveying mechanism ( 131), the second material-picking mechanism (113) is arranged corresponding to the second conveying mechanism (133), the first material-picking mechanism (111) crosses the first conveying mechanism (131) in the second direction Y and moves to the lamination table (1205) on the first lamination station (1201) to place the first pole piece, and the second material-picking mechanism (113) crosses the second conveying mechanism (133) in the second direction Y and moves to the lamination table (1205) on the second lamination station (1203) to place the second pole piece; Wherein, the first direction (X) and the second direction (Y) form a right angle.

2. The lamination device according to claim 1, characterized in that The stacking platform (1205) is provided with one or more stacking positions, and the material taking component includes a plurality of manipulators, and the manipulators include vacuum adsorption plates.

3. A battery cell production line, characterized in that: include: The battery cell stacking device according to any one of claims 1 to 2.

4. The battery cell production line according to claim 3, characterized in that: Also includes: A first pole piece rejecting mechanism is provided on the first conveying mechanism (131) of the battery cell stacking device (100) to reject waste products in the first pole piece; The second pole piece rejecting mechanism is provided on the second conveying mechanism (133) of the battery cell stacking device (100) to reject waste products in the second pole piece.

5. The battery cell production line according to claim 4, characterized in that: The first conveying mechanism (131) and the second conveying mechanism (133) both include: A first conveyor belt (1305) adapted to absorb the first side surface of the electrode; A second conveyor belt (1307) is connected to the first conveyor belt (1305) to absorb the second side surface of the electrode, the first side surface being opposite to the second side surface; A third conveyor belt (1309) is connected to the second conveyor belt (1307) to absorb the first side surface of the electrode; Wherein, the first electrode rejection mechanism is arranged on the second conveyor belt (1307) of the first conveying mechanism (131), the second electrode rejection mechanism is arranged on the second conveyor belt (1307) of the second conveying mechanism (133), the first material collection position (1301) is arranged on the third conveyor belt (1309) of the first conveying mechanism (131), and the second material collection position (1303) is arranged on the third conveyor belt (1309) of the second conveying mechanism (133).

6. The battery cell production line according to claim 5, characterized in that: Also includes: A first pole piece cutting mechanism (151) is suitable for cutting the first pole piece after the pole tab is manufactured; A second pole piece cutting mechanism (153) is suitable for cutting the second pole piece after the pole tab is manufactured; The first electrode piece cutting mechanism (151) is arranged upstream of the feeding end of the first conveying mechanism (131), and the second electrode piece cutting mechanism (153) is arranged upstream of the feeding end of the second conveying mechanism (133).

7. The battery cell production line according to claim 6, characterized in that: The first pole piece cutting mechanism (151) and the second pole piece cutting mechanism (153) both comprise laser cutting mechanisms.

8. The battery cell production line according to any one of claims 4 to 7, characterized in that: Also includes: a blanking assembly, adapted to blank the battery cells on the stacking table (1205) of the battery cell stacking device (100); A battery core correction assembly comprises a hot pressing assembly (183), a battery core separation assembly (185) and a glue sticking assembly (187) which are arranged in sequence; The unloading mechanism (181) is suitable for transporting the battery cells that have completed hot pressing in the hot pressing component (183) to the battery cell separation component (185) for separation, transporting the separated battery cells to the gluing component (187), and transporting the glued battery cells to the unloading logistics line.

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