Folding device and battery cell production apparatus

Abstract

The application relates to the field of battery manufacturing, in particular to a turnover device and a battery cell production equipment. The application discloses a turnover device, which comprises a turnover mechanism, a turnover plate of the turnover mechanism can rotate around a first axis, and a laminating mechanism downstream of the turnover mechanism, the laminating mechanism comprises a laminating platform. The turnover plate is configured to turn over 180 degrees to deliver two unit lengths of a material belt to the laminating platform. The application further discloses a battery cell production equipment comprising the turnover device. The turnover device has high laminating efficiency and can improve the production efficiency of laminated battery cells.

Description

Technical Field

[0001] This application relates to the field of battery manufacturing technology, and in particular to a folding device and cell production equipment. Background Technology

[0002] With the rapid development of the new energy field, the manufacturing process of power batteries is also constantly improving. Improving the production efficiency of power batteries is of great significance for reducing the production cost and cycle time of power batteries.

[0003] For stacked battery cells, electrode strips need to be cut into electrodes first, and then electrodes of different polarities are stacked with separators. However, the current common folding devices have low cell production efficiency, which indirectly increases the production cost and production cycle of power batteries. Summary of the Invention

[0004] This application discloses a folding device and a cell production equipment, which can improve the folding efficiency and the production efficiency of folded cells.

[0005] To achieve the above objectives, this application discloses a folding device for manufacturing laminated battery cells, comprising: a flipping mechanism including a flipping plate rotatable about a first axis; and a stacking mechanism located downstream of the flipping mechanism, including a stacking platform; wherein the flipping plate is configured to feed two unit lengths of material strip to the stacking platform every 180° of rotation.

[0006] Optionally, along a first direction, the flipping plate has a middle section and two ends, the first direction being perpendicular to the first axis, and the flipping mechanism further includes: two sets of end flipping components, respectively located at the two ends of the flipping plate; and a middle flipping component, located in the middle of the flipping plate, with the distance between the middle flipping component and each end flipping component along the first direction being a strip of material of one unit length.

[0007] Optionally, both the end flipping assembly and the intermediate flipping assembly include: a pair of pins, arranged opposite each other along the first axis, the pair of pins being able to extend and retract relative to each other in a direction parallel to the first axis.

[0008] Optionally, the flipping mechanism further includes a clamping assembly located in the middle of the flipping plate for clamping the material strip.

[0009] Optionally, the number of clamping components is two, and along the first direction, the two clamping components are respectively disposed on both sides of the intermediate flipping component.

[0010] Optionally, the flipping mechanism further includes: a first base, on which the flipping plate is rotatably mounted about the first axis; and a first drive assembly, mounted on the first base, for driving the flipping plate to rotate about the first axis.

[0011] Optionally, the stacking mechanism further includes: a second base; an intermediate plate mounted on the second base, wherein the stacking platform is slidably mounted on the intermediate plate along the second direction; and a second driving assembly mounted on the intermediate plate for driving the stacking platform to move along the second direction, wherein the second direction is perpendicular to the first axis.

[0012] Optionally, along the first direction, the stacking platform includes a first end and a second end, the intermediate plate is rotatably mounted on the second base about a second axis, the number of stacking platforms is at least two, the second ends of the at least two stacking platforms are located on sides close to each other, and the at least two stacking platforms are spaced apart on the intermediate plate around the second axis. The stacking mechanism further includes: a third driving component, mounted on the second base, for driving the intermediate plate to rotate about the second axis, the second axis being perpendicular to both the first axis and the first direction.

[0013] Optionally, the stacking mechanism further includes a pressing assembly mounted on the intermediate plate for pressing the stacked strips onto the stacking platform.

[0014] Optionally, along a first direction, the stacking platform includes a first end and a second end, the first direction being perpendicular to the first axis, and the tableting assembly having four components, wherein two of the tableting assemblies are located at the second end of the stacking platform, and the other two tableting assemblies are located between the first end and the second end, and are arranged opposite each other in a third direction, the third direction being parallel to the first axis.

[0015] Optionally, the intermediate plate is slidably mounted on the second base along the first axis, and the stacking mechanism further includes: a fourth driving component mounted on the second base for driving the intermediate plate to move along the first axis.

[0016] Optionally, along a first direction, the stacking platform includes a first end and a second end, the first direction being perpendicular to the first axis, and the stacking mechanism further includes a cutting component installed at the first end of the stacking platform for cutting the material strip.

[0017] Some embodiments of this application also propose a cell manufacturing apparatus, including the aforementioned folding device.

[0018] Compared with the prior art, the beneficial effects of this application are as follows:

[0019] The folding device in this application includes a flipping plate and a stacking platform. The flipping plate feeds two unit length strips to the stacking platform every 180°. The two unit length strips are stacked on the stacking platform, thereby achieving high stacking efficiency and improving the production efficiency of stacked cells. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the folding device provided in the embodiments of this application;

[0022] Figure 2 This is a schematic diagram of the flipping mechanism in the folding device provided in the embodiments of this application;

[0023] Figure 3 yes Figure 2 A magnified view of a section at point A in the middle;

[0024] Figure 4 This is a schematic diagram of the stacking mechanism provided in the embodiments of this application;

[0025] Figure 5 yes Figure 4 A magnified view of a section at point B in the middle;

[0026] Figure 6 yes Figure 4 A magnified view of a section at point C;

[0027] Figure 7 This is a schematic diagram of the material strip corresponding to the folding device provided in the embodiments of this application;

[0028] Figure 8 This is a schematic diagram showing the dimensions of the flipping mechanism in the folding device provided in the embodiments of this application;

[0029] Figures 9 to 13 These are all schematic diagrams illustrating the working principle of the folding device provided in the embodiments of this application;

[0030] Figure 14 This is a schematic diagram of the structure of the battery cell production equipment provided in the embodiments of this application.

[0031] Figure Descriptions: 100-Folding device; 110-Flipping mechanism; 111-First base; 112-Flipping plate; 1121-Middle section; 1122-End A; 1123-End B; 113-Intermediate flipping assembly; 1131-Ejector pin; 1132-Ejector pin drive; 114-First end flipping assembly; 115-Second end flipping assembly; 116-First drive assembly; 1161-First motor; 1162-Driving wheel; 1163-Driven wheel; 117-Clamping assembly; 1171-Clamping drive; 1172-Clamping finger; 120-Stacking mechanism; 121-Second base; 122-Stacking platform; 1221-First end; 1222-Second end; 1223-Avoidance groove; 123-Intermediate plate; 124-Second drive assembly; 1241-Second motor; 12 42-Gear; 1243-Rack; 125-Third drive assembly; 1261-First pressing assembly; 12611-Pressing claw; 12612-Pressing drive component; 1262-Second pressing assembly; 1263-Third pressing assembly; 1264-Fourth pressing assembly; 127-Connecting block; 128-Cutting assembly; 1281-Cutting blade; 1282-Cutting drive component; 200-Strip material; 210-Separator; 220-Positive electrode sheet; 230-Negative electrode sheet; 241-First gap; 242-Second gap; 300-Laminated cell; 400-Cell production equipment; 410-Separator unwinding mechanism; 420-First electrode sheet supply device; 430-Second electrode sheet supply device; X-First direction; Z-Second direction; Y-Third direction; P-First axis; Q-Second axis. Detailed Implementation

[0032] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0033] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0034] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0035] The folding device 100 of the embodiments of this application is used to manufacture laminated battery cells 300.

[0036] It is understandable that the laminated cell 300 is formed by folding the strip 200 in a Z-shape.

[0037] like Figure 7 As shown, the strip 200 includes a diaphragm 210 and positive electrode plates 220 and negative electrode plates 230 alternately hot-pressed together on both sides of the diaphragm 210. Along the extension direction of the strip 200, there are gaps between adjacent positive electrode plates 220 and negative electrode plates 230. For example, there is a first gap 241 between the front side of a positive electrode plate 220 and an adjacent negative electrode plate 230, and a second gap 242 between the rear side of a positive electrode plate 220 and another adjacent negative electrode plate 230.

[0038] like Figure 1 As shown, the folding device 100 includes a flipping mechanism 110 and a stacking mechanism 120. The flipping mechanism 110 includes a flipping plate 112, the middle portion 1121 of which is rotatable about a first axis P. The stacking mechanism 120 is located downstream of the flipping mechanism 110 and includes a stacking platform 122. The flipping plate 112 is configured to feed two unit lengths of material strip 200 to the stacking platform 122 every 180° of rotation.

[0039] The folding device 100 of this application embodiment includes a flipping plate 112 and a stacking platform 122. The flipping plate 112 feeds two unit length strips 200 to the stacking platform 122 every 180° flip. The two unit length strips 200 are stacked on the stacking platform 122, thereby achieving higher stacking efficiency and improving the production efficiency of the stacked battery cell 300.

[0040] It is understandable that the unit length of strip 200 refers to the length L0 of the laminated cell 300.

[0041] In some embodiments of this application, the flipping mechanism 110 further includes a first base 111, and the middle portion 1121 of the flipping plate 112 is rotatably mounted on the first base 111 about a first axis P. The stacking mechanism 120 further includes a second base 121, and a stacking platform 122 is mounted on the second base 121. Along the first direction X, the stacking platform 122 includes a first end 1221 and a second end 1222. The first end 1221 is aligned with the middle portion 1121 of the flipping plate 112, and the second end 1222 is aligned with the end of the flipping plate 112. The first direction X is perpendicular to the first axis P. In other embodiments, the flipping plate 112 and the stacking platform 122 may also be mounted on the same base.

[0042] In some embodiments of this application, the first base 111 includes two frames spaced apart along a first axis P, and two flip plates 112, each flip plate 112 being rotatably mounted on the same side of the frame. Each flip plate 112 is driven by an independent drive assembly to achieve synchronous rotation of the two flip plates 112, which are configured to jointly convey the material belt 200. In other embodiments, only one flip plate 112 may be provided, and one flip plate 112 completes the conveying of the material belt 200.

[0043] In some embodiments of this application, along the first direction X, the flipping plate 112 has a middle portion 1121 and two ends. The flipping mechanism 110 also includes a set of intermediate flipping components 113 and two sets of end flipping components. The two sets of end flipping components are located at the two ends of the flipping plate 112 respectively. Along the first direction X, the distance from the intermediate flipping component 113 to each end flipping component is a strip 200 of one unit length. The first direction X is perpendicular to the first axis P.

[0044] like Figure 2 and Figure 3 As shown, specifically, the two ends are A end 1122 and B end 1123, and the two sets of end flipping components are the first end flipping component 114 and the second end flipping component 115. The first end flipping component 114 is located at A end 1122, the second end flipping component 115 is located at B end 1123, and the middle flipping component 113 is located in the middle 1121 of the flipping plate 112. The length of the two unit length material strips 200 is the distance between the first end flipping component 114 and the second end flipping component 115.

[0045] It is understood that A end 1122 and B end 1123 refer to the two ends of the flip plate 112 along the first direction X. The first end flip component 114 located at A end 1122 means that the first end flip component 114 is located in the area between A end 1122 and the middle part 1121 of the flip plate 112, and is set close to A end 1122. The second end flip component 115 located at B end 1123 means that the second end flip component 115 is located in the area between B end 1123 and the middle part 1121 of the flip plate 112.

[0046] Combination Figure 7 and Figure 8 Along the first direction X, the distance between the intermediate flipping component 113 and the first end flipping component 114 is L1, and the distance between the intermediate flipping component 113 and the second end flipping component 115 is L2, where L1 = L2 = L0. In the second direction Z, the first end flipping component 114 and the second end flipping component 115 abut against the material belt 200 from one side, and the intermediate flipping component 113 abuts against the material belt 200 from the other side. For example, when the second direction Z is vertical, the intermediate flipping component 113 abuts against the material belt 200 from above, and the first end flipping component 114 and the second end flipping component 115 abut against the material belt 200 from below.

[0047] In this manner, the intermediate flipping component 113 can be made to abut against either the first gap 241 or the second gap 242 each time.

[0048] The first end flipping component 114, the second end flipping component 115, and the middle flipping component 113 have the same structure.

[0049] like Figure 3 As shown, taking the intermediate flip assembly 113 as an example, the intermediate flip assembly 113 includes a pair of ejector pins 1131, which are arranged opposite each other along the first axis P. The pair of ejector pins 1131 can extend and retract relative to each other in a direction parallel to the first axis P. The intermediate flip assembly 113 includes two ejector pin drivers 1132, and each ejector pin 1131 is mounted on the execution end of the corresponding ejector pin driver 1132. The ejector pin driver 1132 drives the corresponding ejector pin 1131 to extend or retract along the first axis P.

[0050] A pair of ejector pins 1131 extend outwards to abut against the surface of the strip 200, folding the strip 200.

[0051] In some embodiments of this application, the flipping mechanism 110 further includes a clamping assembly 117 located at the center 1121 of the flipping plate 112 for clamping the strip 200.

[0052] The clamping assembly 117 includes a pair of clamping fingers 1172 disposed opposite to each other along the first axis P. Each clamping finger 1172 is mounted on the driving end of a corresponding clamping drive 1171. The clamping drive 1171 is mounted on the flip plate 112 and is used to drive the corresponding clamping finger 1172 to open or close along the second direction Z.

[0053] By setting the clamping component 117, the end of the material strip 200 can be clamped when the stacking begins, thereby realizing the automated stacking operation of the stacking device 100.

[0054] In some embodiments of this application, there are two clamping components 117, which are respectively disposed on both sides of the intermediate flipping component 113 along the first direction X.

[0055] The first end flipping component 114 and the second end flipping component 115 are respectively provided with a clamping component 117, which can flexibly select one of the end flipping components to abut against the initial segment of the material belt 200.

[0056] In other embodiments, only one clamping component 117 may be provided.

[0057] like Figure 2 As shown, in some embodiments of this application, the flipping mechanism 110 further includes a first driving component 116, which is mounted on the first base 111 and is used to drive the flipping plate 112 to rotate around the first axis P.

[0058] As an example, the first drive assembly 116 includes a first motor 1161, a drive wheel 1162, and a driven wheel 1163. The first motor 1161 is mounted on the first base 111, the driven wheel 1163 is mounted on the flip plate 112, the drive wheel 1162 is mounted on the output end of the first motor 1161, the drive wheel 1162 and the driven wheel 1163 are meshed together, and the flip plate 112 is driven to rotate around the first axis P by the first motor 1161.

[0059] like Figure 1 As shown, the stacking mechanism 120 is located downstream of the flipping mechanism 110 and is used to receive the material strip 200 conveyed by the flipping mechanism 110 and complete the stacking to form a stacked battery cell 300.

[0060] like Figure 1 and Figure 4 As shown, in some embodiments of this application, the surface of the stacking platform 122 also has a clearance groove 1223 for avoiding the gripping robot, so as to allow the robot to grip the stacked cells 300 for delivery to the next stage.

[0061] like Figure 4As shown, in some embodiments of this application, the stacking mechanism 120 further includes an intermediate plate 123 and a second drive assembly 124. The intermediate plate 123 is mounted on the second base 121, and the stacking platform 122 is slidably mounted on the intermediate plate 123 along the second direction Z; the second drive assembly 124 is mounted on the intermediate plate 123 and is used to drive the stacking platform 122 to move along the second direction Z, wherein the second direction Z, the first axis P, and the first direction X are arranged perpendicularly to each other.

[0062] Specifically, the second direction Z is the vertical direction; in other embodiments, the second direction Z may also be other directions.

[0063] like Figure 4 As shown, as an example, the second drive assembly 124 includes a second motor 1241, a gear 1242, and a rack 1243. The second motor 1241 is mounted on the intermediate plate 123, the gear 1242 is mounted on the output end of the second motor 1241, and the rack 1243 is mounted on the lamination platform 122 along the second direction Z. The gear 1242 and the rack 1243 are meshed together to enable the second motor 1241 to drive the lamination platform 122 to move along the second direction Z.

[0064] The second drive component 124 can drive the stacking platform 122 to move along the second direction Z, and can continuously reduce the height of the stacking platform 122 during the stacking process, so that the height of the flipping mechanism 110 matches the height of the multi-layer strips 200 stacked on the stacking platform 122.

[0065] like Figure 4 As shown, in some embodiments of this application, the intermediate plate 123 is rotatably mounted on the second base 121 about the second axis Q. There are at least two stacking platforms 122, with their second ends 1222 located on adjacent sides. These at least two stacking platforms 122 are spaced apart on the intermediate plate 123 around the second axis Q. The stacking mechanism 120 also includes a third drive assembly 125, mounted on the second base 121, for driving the intermediate plate 123 to rotate about the second axis Q. The second axis Q is perpendicular to both the first axis P and the first direction X.

[0066] As one example, there are two stacking platforms 122, which are arranged opposite each other along a first direction X, with their second ends 1222 located on the side closest to each other. Alternatively, there are four stacking platforms 122, which are spaced apart around a second axis Q, with the second end 1222 of each stacking platform 122 located on the side closest to the second axis Q.

[0067] With this arrangement, the stacking mechanism 120 has multiple stacking platforms 122. After a stacking platform 122 is stacked to form a stacked cell 300, it can switch to the next empty stacking platform 122 and remove the stacked cell 300 that has been stacked at the same time, thereby shortening the production cycle of the flipping device 100 and improving the stacking efficiency of the flipping device 100.

[0068] In other embodiments, multiple flipping mechanisms 110 may be provided, with each flipping mechanism 110 corresponding to a stacking platform 122 to achieve simultaneous flipping to form multiple stacked cells 300.

[0069] In some embodiments of this application, the stacking mechanism 120 further includes a pressing assembly mounted on the intermediate plate 123 for pressing the stacked strips 200 onto the stacking platform 122.

[0070] The tableting assembly is used to press the strip 200 onto the stacking platform 122 along the second direction Z. The number of tableting assemblies can be one or more. The tableting assemblies can be arranged relative to each other or side by side in a certain direction.

[0071] By setting up a pressing assembly, the multi-layer strips 200 that have been stacked on the stacking platform 122 can be pressed tightly onto the stacking platform 122, thereby improving the stacking quality of the flipping device 100.

[0072] like Figure 5 and Figure 6 As shown, in some embodiments of this application, there are four tablet pressing assemblies, two of which are located at the second end 1222 of the stacking platform 122, and the other two are located between the first end 1221 and the second end 1222, and are arranged opposite to each other in the third direction Y. The first direction X, the second direction Z and the third direction Y are arranged perpendicularly to each other.

[0073] It is easy to understand that the third direction Y and the first axis P are set parallel.

[0074] Multiple tableting components can be used to press the multi-layer strip 200 approximately evenly around the tableting platform 122.

[0075] like Figure 5 and Figure 6 As shown, specifically, the four tableting assemblies are a first tableting assembly 1261, a second tableting assembly 1262, a third tableting assembly 1263, and a fourth tableting assembly 1264. The first tableting assembly 1261 and the second tableting assembly 1262 are both located at the second end 1222 of the stacking platform 122 and are arranged side by side along the third direction Y; the third tableting assembly 1263 and the fourth tableting assembly 1264 are both located between the first end 1221 and the second end 1222 and are arranged opposite each other along the third direction Y.

[0076] The four tablet compression components have basically the same structure and operating principle.

[0077] like Figure 5 As shown, taking the first tableting assembly 1261 as an example, the first tableting assembly 1261 includes a tableting claw 12611 and a tableting drive 12612. The tableting drive 12612 is mounted on the intermediate plate 123, and the tableting claw 12611 is mounted on the execution end of the tableting drive 12612. The tableting drive 12612 is used to drive the tableting claw 12611 to move in the second direction Z and the first direction X, so that the tableting claw 12611 has a pressing position that presses the material strip 200 from the second direction Z and an avoidance position that fully exposes the stacked cells 300 on the stacking platform 122 so as to facilitate their unloading.

[0078] Furthermore, the first tableting assembly 1261 and the third tableting assembly 1263 are configured to operate synchronously, and the second tableting assembly 1262 and the fourth tableting assembly 1264 are configured to operate synchronously. By sequentially and alternately pressing the material strip 200 from the diagonal, the force on the material strip 200 can be evenly applied, reducing the degree of damage to the material strip 200 during the pressing process.

[0079] like Figure 4 As shown, in some embodiments of this application, the stacking mechanism 120 further includes a fourth driving component (not shown in the figure), the intermediate plate 123 is slidably mounted on the second base 121 along the first axis P, and the fourth driving component is mounted on the second base 121 for driving the intermediate plate 123 to move along the first axis P.

[0080] Specifically, the stacking mechanism 120 also includes a connecting block 127, which is slidably mounted on the second base 121 along the first axis P, and the intermediate plate 123 is mounted on the connecting block 127.

[0081] With this arrangement, the position of the stacking platform 122 along the first axis P can be precisely adjusted so that the stacking platform 122 is aligned with the position of the flipping plate 112 along the first axis P.

[0082] like Figure 6 As shown, in some embodiments of this application, the stacking mechanism 120 further includes a cutting component 128, which is installed at the first end 1221 of the stacking platform 122 for cutting the strip 200.

[0083] The cutting assembly 128 includes a cutting blade 1281 and a cutting drive 1282. The cutting drive 1282 is mounted on the intermediate plate 123, and the cutting blade 1281 is mounted on the execution end of the cutting drive 1282. The cutting drive 1282 is used to drive the cutting blade 1281 to cut the strip 200 from one side of the strip 200 along the second direction Z to remove defective segments or complete the stacking of a stacked cell 300.

[0084] The aforementioned stacking platform 122 has multiple implementations, and each stacking platform 122 has a cutting component 128 at its first end 1221.

[0085] like Figure 14 As shown, some embodiments of this application also propose a cell manufacturing equipment 400, including a folding device 100.

[0086] Specifically, the battery cell production equipment 400 includes a diaphragm unwinding mechanism 410, a first electrode supply device 420, a second electrode supply device 430, and a folding device 100. The diaphragm unwinding mechanism 410 unwinds the diaphragm 210. The first electrode supply device 420 and the second electrode supply device 430 are sequentially arranged downstream of the diaphragm unwinding mechanism 410. One of the first electrode supply device 420 and the second electrode supply device 430 provides a positive electrode 220 and heat-presses it onto one side of the diaphragm 210; the other provides a negative electrode 230 and heat-presses it onto the other side of the diaphragm 210 to form a strip 200. The folding device 100 is located downstream of the first electrode supply device 420 and the second electrode supply device 430, and is used to receive the strip 200 and fold two unit lengths of the strip 200 in each cycle to form a laminated battery cell 300.

[0087] The working principle of the folding device 100 in this embodiment is as follows:

[0088] like Figure 9 As shown, the device is initialized by feeding the material strip 200 into the flipping mechanism 110 along the first direction X, and aligning the B end 1123 of the flipping plate 112 with the second end 1222 of the stacking platform 122.

[0089] Step 1: The clamping assembly 117 corresponding to end A 1122 of the flip plate 112 clamps the end of the strip 200, and a pair of pins of the first end flip assembly 114 extend to press against the first gap 241 of the strip 200 from below.

[0090] like Figure 10As shown, in the second step: the first drive assembly 116 drives the flipping plate 112 to rotate 180° around the first axis P toward the stacking platform 122. The A end 1122 is aligned with the second end 1222 of the stacking platform 122. The first end flipping assembly 114 moves from the left to the right and is located above the material strip 200. The material strip 200 is brought onto the stacking platform 122. The first pressing assembly 1261 and the third pressing assembly 1263 simultaneously press the material strip 200. At the same time, the second end flipping assembly 115 of the B end 1123 reaches the position before the first end flipping assembly 114. After its pair of ejector pins are in place, they extend and press the material strip 200 from below.

[0091] Step 3: The pair of ejector pins of the first end flipping assembly 114 of end A 1122 retract to avoid the stacking mechanism 120. The second drive assembly 124 drives the stacking platform 122 to descend one unit height H along the second direction Z. At this time, the pair of ejector pins of the middle flipping assembly 113 extend out and press against the second gap 242 of the material strip 200 from the upper side of the material strip 200.

[0092] like Figure 11 As shown, in the fourth step: the flipping plate 112 continues to rotate 180°, and end A 1122 moves from the right side to the left side again. At the same time, the second end flipping component 115 of end B 1123 presses against the second gap 242 of the material strip 200 from the bottom side and moves from the left side to the right side, driving the two unit length L material strips 200 to the stacking platform 122 again. At this time, the second tableting component 1262 and the fourth tableting component 1264 press the material strip 200, the first tableting component 1261 and the third tableting component 1263 retract, and the second end flipping component 115 and the middle flipping component 113 retract.

[0093] Step 5: The second drive assembly 124 drives the stacking platform 122 to descend another unit height H, the middle flipping assembly 113 extends and blocks the next second gap 242 from the top, and then repeats the action of step 4 until the stacked strip 200 on the stacking platform 122 reaches the specified number of layers.

[0094] like Figure 12 As shown, in step six: the second pressing assembly 1262, the third pressing assembly 1263 and the fourth pressing assembly 1264 simultaneously press the material strip 200, and the cutting blade 1281 of the cutting assembly 128 moves upward to cut the material strip 200 from the electrode gap, thus completing the stacking operation of a stacked cell 300.

[0095] Step 7: The flip plate 112 flips 90° to achieve a vertically extended avoidance position. The fourth drive assembly (not shown in the figure) drives the middle plate 123 to be pushed outward along the first axis P. The third drive assembly 125 drives the middle plate 123 to rotate around the second axis Q to switch another stacking platform 122 to dock with the flipping mechanism 110.

[0096] like Figure 13 As shown, in step eight: the intermediate plate 123 and the flip plate 112 are both reset, and the next stacking operation of the battery cell 300 is carried out. The previously completed stacked battery cell 300 can be taken out by the robot and transferred to the next stage.

[0097] Using the folding device 100 of this application embodiment to produce stacked cells 300 can realize fully automated stacking operations and has high production efficiency.

[0098] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A folding device (100) for manufacturing laminated battery cells (300), characterized in that, include: The flipping mechanism (110) includes a flipping plate (112) that is rotatable about a first axis; The stacking mechanism (120), located downstream of the flipping mechanism (110), includes a stacking platform (122). The flip plate (112) is configured to feed two unit lengths of strip to the stacking platform (122) every 180° rotation; Along a first direction, the flipping plate (112) has a middle portion (1121) and two ends, the first direction being perpendicular to the first axis, and the flipping mechanism (110) further includes: Two sets of end-flipping components are respectively located at the two ends of the flipping plate (112); The intermediate flipping assembly (113) is located in the middle (1121) of the flipping plate (112). Along the first direction, the distance between the intermediate flipping assembly (113) and each of the end flipping assemblies is a strip of material of one unit length. A clamping assembly (117), located in the middle (1121) of the flip plate (112), is used to clamp the end of the strip (200) when stacking begins; The two sets of end flipping components are used to abut against the material strip (200) from one side in the second direction, and the middle flipping component (113) is used to abut against the material strip (200) from the other side in the second direction.

2. The folding device (100) according to claim 1, characterized in that, Both the end flipping assembly and the intermediate flipping assembly (113) include: A pair of ejector pins (1131) are arranged opposite each other along the first axis, and the pair of ejector pins (1131) are capable of extending and retracting relative to each other in a direction parallel to the first axis.

3. The folding device (100) according to claim 1, characterized in that, The number of clamping components (117) is two, and along the first direction, the two clamping components (117) are respectively disposed on both sides of the intermediate flipping component (113).

4. The folding device (100) according to claim 1, characterized in that, The flipping mechanism (110) also includes: The first base (111) is on which the flip plate (112) is rotatably mounted about the first axis. A first drive assembly (116) is mounted on the first base (111) for driving the flip plate (112) to rotate around the first axis.

5. The folding device (100) according to claim 1, characterized in that, The stacking mechanism (120) further includes: Second base (121); An intermediate plate (123) is mounted on the second base (121), and the stacking platform (122) is slidably mounted on the intermediate plate (123) along the second direction. The second drive assembly (124), mounted on the intermediate plate (123), is used to drive the stacking platform (122) to move along the second direction, which is perpendicular to the first axis.

6. The folding device (100) according to claim 5, characterized in that, Along a first direction, the stacking platform (122) includes a first end (1221) and a second end (1222), the intermediate plate (123) is rotatably mounted on the second base (121) about a second axis, the number of stacking platforms (122) is at least two, the second ends (1222) of at least two stacking platforms (122) are located on mutually close sides, and at least two stacking platforms (122) are spaced apart on the intermediate plate (123) about the second axis, the stacking mechanism (120) further includes: The third drive assembly (125) is mounted on the second base (121) and is used to drive the intermediate plate (123) to rotate around the second axis, which is perpendicular to the first axis and the first direction.

7. The folding device (100) according to claim 5, characterized in that, The stacking mechanism further includes: A tableting assembly, mounted on the intermediate plate (123), is used to press the stacked strips (200) onto the tableting platform (122).

8. The folding device (100) according to claim 7, characterized in that, Along a first direction, the stacking platform (122) includes a first end (1221) and a second end (1222), the first direction being perpendicular to the first axis. The tablet pressing assembly has four components, two of which are located at the second end (1222) of the stacking platform (122), and the other two are located between the first end (1221) and the second end (1222), and are arranged opposite each other in a third direction, the third direction being parallel to the first axis.

9. The folding device (100) according to claim 5, characterized in that, The intermediate plate (123) is slidably mounted on the second base (121) along the first axis, and the stacking mechanism (120) further includes: A fourth drive assembly, mounted on the second base (121), is used to drive the intermediate plate (123) to move along the first axis.

10. The folding device (100) according to claim 1, characterized in that, Along a first direction, the stacking platform (122) includes a first end (1221) and a second end (1222), the first direction being perpendicular to the first axis, and the stacking mechanism (120) further includes: A cutting assembly (128) is installed at the first end (1221) of the stacking platform (122) for cutting the strip (200).

11. A battery cell manufacturing equipment, characterized in that, Includes the folding device (100) as described in any one of claims 1-10.

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