CN115663410A - Tab flattening method - Google Patents
Tab flattening method Download PDFInfo
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- CN115663410A CN115663410A CN202211454199.6A CN202211454199A CN115663410A CN 115663410 A CN115663410 A CN 115663410A CN 202211454199 A CN202211454199 A CN 202211454199A CN 115663410 A CN115663410 A CN 115663410A
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Abstract
The invention relates to a pole lug flattening method, which comprises the following steps: the pole lug final-photographing assembly is used for flattening the pole lug of the reference electric core, the position of the reference electric core is set as reference position information, and the displacement driven by the first driving piece of the pole lug final-photographing assembly is set as first reference displacement; acquiring actual position information of the battery cell to be processed on the tab final shooting assembly; acquiring current cell offset information according to the actual position information and the reference position information; adjusting actual displacement driven by a first driving piece of the tab final shooting assembly according to the cell offset information and the first reference displacement; and controlling the corresponding first driving part to drive the pressing plate to beat the pole ear of the cell to be processed according to the actual displacement. The pole lug flattening method positions the actual position of the battery cell through the flattening camera positioning device, obtains the deviant of the battery cell in real time, corrects the extending distance of the two pressing plates according to the deviant of the battery cell, flattens the pole lug more accurately and improves the yield of the battery cell.
Description
Technical Field
The invention relates to the field of battery cell manufacturing, in particular to a tab flattening method.
Background
The battery cell production equipment winds the positive plate, the negative plate and the diaphragm in a laminated mode to form a battery cell, and the two ends of the battery cell are provided with extended tabs. After the winding of the battery core is completed, the tab needs to be bent towards the center of the circle of the end surface of the battery core until the tab is completely attached to the end surface of the battery core, and the process is called as the tab flattening. After the tabs are flattened, the battery cell is conveniently arranged in the shell.
The conventional tab flattening method is to directly act on a tab through a tab flattening device and press the tab towards the end surface of a battery cell. Since the cell is usually transported between the two leveling devices via a conveyor belt, its position is not strictly limited. When different electric cores skew, can lead to the utmost point ear to beat the uniformity of effect poor, electric core defective rate is high.
Disclosure of Invention
The invention aims to provide a tab flattening method, which can improve the tab flattening effect and improve the yield of a battery cell.
In order to achieve the above object, the tab flattening method of the present invention comprises:
the pole lug final-photographing assembly is used for flattening the pole lug of the reference electric core, the position of the reference electric core is set as reference position information, and the displacement driven by the first driving piece of the pole lug final-photographing assembly is set as first reference displacement;
acquiring actual position information of the battery cell to be processed on the tab final shooting assembly;
acquiring current cell offset information according to the actual position information and the reference position information;
adjusting actual displacement driven by a first driving piece of the tab final shooting assembly according to the cell offset information and the first reference displacement;
and controlling the corresponding first driving part to drive the pressing plate to beat the pole ear of the cell to be processed according to the actual displacement.
In one embodiment, the setting of the position of the reference cell as the reference position information includes: and acquiring the position information of the reference cell close to one end of the clapping camera positioning device at the tab final-shooting component as reference position information through a clapping camera positioning device.
In one embodiment, the acquiring actual position information of the to-be-processed battery cell in the tab final-shooting assembly includes: and acquiring the position information of the battery cell to be processed at one end of the pole lug final shooting assembly close to the flattening camera positioning device through a flattening camera positioning device as actual position information.
In one embodiment, the opposite surfaces of the pressure plates of the pole lug final shooting assembly are planes.
In one embodiment, the tab leveling method further includes, before the step of acquiring the actual position information of the battery cell to be processed in the tab final-photographing assembly:
and pretreating the lug of the battery cell to be treated through a lug pre-shooting assembly.
In one embodiment, the pre-processing the tab of the battery cell to be processed through a tab pre-photographing assembly includes:
the electrode lug pre-shooting assembly is used for pre-processing the electrode lug of the reference battery cell, and a pressure plate stress value of the electrode lug pre-shooting assembly is set as a reference pressure value;
the electrode lug pre-shooting assembly is used for pre-treating the electrode lugs of the battery cell to be treated, and the first driving pieces of the electrode lug pre-shooting assembly drive the pressing plates to be close to each other;
acquiring an actual pressure value of a pressure plate of the lug pre-shooting assembly;
when the actual pressure value reaches the reference pressure value, the first driving piece corresponding to the lug pre-shooting assembly stops driving the pressing plate to move, and the pressure is stabilized for a set time.
In one embodiment, the pre-processing the tab of the battery cell to be processed through a tab pre-photographing assembly includes:
the lug pre-shooting assembly is used for pre-treating the lug of the reference battery cell, and the displacement driven by the first driving piece of the lug pre-shooting assembly is set as a second reference displacement;
the electrode lug pre-shooting assembly is used for pre-treating the electrode lug of the battery cell to be treated, and the first driving piece of the electrode lug pre-shooting assembly drives the pressing plate to move for second reference displacement.
In one embodiment, at least one pressing plate of the tab pre-photographing assembly is provided with a conical groove acting on the tab, and one end of the conical groove close to the battery cell is a large-diameter end, and the other end of the conical groove far away from the battery cell is a small-diameter end.
In one embodiment, the tab flattening method further includes, before the step of controlling the corresponding first driving member to drive the pressing plate according to the actual displacement to flatten the tab of the to-be-processed battery cell: the battery core to be processed is fixed through a clamping jaw assembly.
In one embodiment, the tab flattening method further includes, before the step of preprocessing the tab of the battery cell to be processed by using a tab preprocessing assembly: the battery core to be processed is fixed through a clamping jaw assembly.
In conclusion, the tab leveling method of the invention positions the actual position of the battery cell through the leveling camera positioning device, obtains the offset value of the battery cell in real time, corrects the extending distance of the two pressing plates according to the offset value of the battery cell, and levels the tab more accurately; set up utmost point ear before the utmost point ear is clapped the subassembly eventually, clap the utmost point ear of subassembly to electric core tip in advance through utmost point ear and buckle in advance, the effect of clapping that improves utmost point ear is clapped to the two-stage, improves the electric core yield.
Drawings
Fig. 1 is a structural view of an embodiment of a tab leveling device used in the tab leveling method according to the present invention;
fig. 2 is a schematic flow chart of an embodiment of a tab flattening method according to the present invention;
fig. 3 is a schematic diagram illustrating a pole lug final-photographing assembly for calibrating and leveling a to-be-processed battery cell according to a reference battery cell;
fig. 4 is a structural view of another embodiment of a tab leveling device used in the tab leveling method according to the present invention;
fig. 5 is a schematic flow chart of an embodiment of a pre-patting assembly of the tab in a constant pressure patting manner;
fig. 6 is a schematic flow chart of an embodiment of the tab pre-photographing assembly in a fixed-moment photographing manner;
fig. 7 is a structural view of a tab leveling device according to still another embodiment of the tab leveling method of the present invention;
in the figure: 10. a reference cell core; 20. a battery cell to be treated; 100. a pole lug final-shooting assembly; 110. pressing a plate; 111. a connecting plate; 120. a first driving member; 130. a drive arm; 131. installing a board surface; 140. mounting screws; 141. a gasket; 150. a base; 160. a side plate; 170. a second guide rail; 180. a pressure sensor; 190. a third guide rail; 200. a camera positioning device for panning; 210. a support; 220. a camera; 230. a light source; 240. an L-shaped mounting plate; 300. a lug pre-shooting assembly; 310. a tapered recess; 400. a jaw assembly; 410. a clamping jaw cylinder; 420. a clamping jaw; 430. a first mounting plate; 440. a second mounting plate; 450. a first guide rail; 460. a second driving member.
Detailed Description
The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.
The tab flattening method comprises the step of bending tabs at two ends of the battery cell towards the end face of the battery cell until the laminated tabs are attached to the end face of the battery cell. The tab flattening method is realized through a tab flattening device which is arranged above a conveyor belt for conveying the battery cell. In the specification, "reference cell" is defined as a design size of a cell as a reference for detecting a cell to be processed.
Fig. 1 is a schematic view of a tab leveling device according to an embodiment, fig. 2 is a schematic view of a flow of a tab leveling method using the tab leveling device, and fig. 3 is a schematic view of a tab final-time-taking assembly calibrating and leveling a to-be-processed battery cell according to a reference battery cell.
As shown in fig. 1, in this embodiment, the tab leveling device includes a tab final-photographing assembly 100 and a leveling camera positioning device 200, which are arranged along the cell conveying direction. The tab final-shooting assembly 100 beats the tab flat towards the end face of the battery cell, the beat camera positioning device 200 acquires the position information of the battery cell at the position of the tab final-shooting assembly 100, and adjusts the beat action of the tab final-shooting assembly 100 according to the position information.
The tab final-photographing assembly 100 includes two pressing plates 110 disposed at both sides of the conveyor belt and disposed opposite to each other, and two first driving members 120 for driving the two pressing plates 110 to move relatively, respectively. The first driving member 120 is preferably an electric cylinder, and the driving end thereof is connected to the pressing plate 110 by a driving arm 130, and the driving arm 130 is fastened to the pressing plate 110 by a mounting screw 140. The first driving member 120 is disposed on a base 150, a side plate 160 is disposed on the base 150, and the driving arm 130 is slidably connected to the side plate 160 through a second guide rail 170. The extending direction of the second guide rail 170 is perpendicular to the conveying direction of the battery cells, and the second guide rail 170 is arranged to guide the movement of the pressing plate 110.
The opposite surfaces of the pressing plates 110 of the tab finishing assembly 100 are flat. The first driving element 120 drives the two pressing plates 110 to move relatively, and the plane of the two pressing plates 110 presses the tabs towards the end surface of the battery cell, so that the laminated tabs are attached to the end surface of the battery cell.
In order to detect the pressure between the pressure plate 110 and the tab, a pressure sensor 180 is further provided between the driving arm 130 and the pressure plate 110. The pressure sensor 180 is mounted as follows: one side of the driving arm 130 facing the pressure plate 110 is provided with a mounting groove, the pressure sensor 180 is disposed in the mounting groove, and a detection head of the pressure sensor 180 abuts against the pressure plate 110. The driving arm 130 has a mounting plate 131 parallel to the pressing plate 110, a mounting screw 140 penetrates the mounting plate 131 to connect the driving arm 130 and the pressing plate 110, and a gasket 141 is further disposed on the mounting screw 140 to perform a buffering function. A certain gap is also formed between the gasket 141 and the mounting plate surface 131, and is used for the extension and contraction of the detection head of the pressure sensor 180 and the detection of the pressure plate 110 on the tab.
The driving arm 130 is provided with a third guide rail 190, the extending direction of the third guide rail 190 is perpendicular to the conveying direction of the battery core, and the pressing plate 110 is slidably connected with the third guide rail 190 through a connecting plate 111. Due to the arrangement of the third guide rail 190, the pressure plate 110 moves along the third guide rail 190 when the pressure sensor 180 works, the pressure plate 110 is prevented from shaking, and the pole lug pressing effect is better.
The tab end tap assembly 100 is provided with a pressure sensor 180 to prevent damage to the tab/cell, and when the pressure reaches a set value, the pressing plate 110 is stopped to press to the cell. When the electric core is when its axial direction skew, that is the electric core is close to the clamp plate 110 of one side and when keeping away from the clamp plate 110 of opposite side, if the first driving piece 120 of both sides all stretches out preset length, then will contact and clap utmost point ear before stretching out preset length when the first driving piece 120 of one of them side, and the first driving piece 120 of opposite side still can not target in place the utmost point ear pressfitting after stretching out preset length, and this will influence the effect of clapping of utmost point ear.
In order to avoid the above phenomenon, the tab leveling device is provided with a leveling camera positioning device 200 at the downstream of the tab finishing assembly 100. The leveling camera positioning device 200 comprises a support 210, a camera 220 and a light source 230, wherein the camera 220 is arranged on one side of the conveyor belt through the support 210 and is used for acquiring the position information of the battery cell at the position of the tab final-shooting assembly 100; the light source 230 is used for supplementing light to the battery cell, so that the imaging of the camera 220 is clearer. The camera 220 and the light source 230 are both mounted on the bracket 210 through an L-shaped mounting plate 240, and the mounting positions can be adjusted to adapt to batteries with different lengths. The specific installation and adjustment modes are common and are not described in detail.
As shown in fig. 2 and 3, the tab flattening method using the tab flattening device includes:
s1: setting reference position information X1 of a reference battery cell in the tab final-shooting assembly 100, and setting displacement driven by a first driving piece 120 of the tab final-shooting assembly 100 as first reference displacement X2 when the tab final-shooting assembly 100 beats a tab of the reference battery cell;
s2, transmitting the battery cell to be processed to the tab final-shooting assembly 100, and acquiring actual position information A1 of the battery cell to be processed in the tab final-shooting assembly 100;
s3: acquiring current cell offset information (A1-X1) according to the actual position information A1 and the reference position information X1;
s4, adjusting the actual displacement (X2-A1 + X1, X2+ A1-X1) driven by the first driving piece 120 of the tab final shooting assembly 100 according to the cell offset information (A1-X1) and the first reference displacement X2;
s5: and controlling the corresponding first driving part 120 to drive the pressing plate 110 to flatten the pole ear of the cell to be processed according to the actual displacement (X2-A1 + X1, X2+ A1-X1).
The camera 220 shoots position information of one end of the reference electrical core 10 and one end of the to-be-processed electrical core 20 close to the leveling camera positioning device 200, and the position information is respectively used as reference position information X1 and actual position information A1.
The tab flattening method provided by the invention can be used for calculating the deviation value of the battery cell in real time by acquiring the actual position of the battery cell to be processed in real time, and automatically correcting the actual displacement of the first driving part 120 according to the deviation value, so that the precision of tab flattening is improved by the closed-loop control method.
In order to reduce the defects of the tab folding and flattening and further improve the tab flattening effect, the tab flattening method further comprises the steps of performing before the step of acquiring the actual position information of the to-be-processed battery cell in the tab final-photographing assembly 100: the tab of the battery cell is preprocessed by a tab pre-shooting assembly 300.
As shown in fig. 4, the tab pre-beating assembly 300 and the tab final-beating assembly 100 have substantially the same structure, and the tab pre-beating assembly 300 also has the pressing plates 110 disposed on both sides of the conveyor belt and disposed opposite to each other and the first driving members 120 for driving the pressing plates 110 to move relatively. The difference is that a tapered groove 310 is formed in one side, close to the battery cell, of at least one pressing plate 110 of the tab pre-beating assembly 300. When one end/both ends of the battery cell have tabs to be flattened, the tapered groove 310 can pre-flatten the tabs.
In this embodiment, the two ends of the battery cell are both provided with tabs, and therefore, the surfaces of the two pressing plates 110 of the tab pre-shooting assembly 300, which are opposite to each other, are both provided with tapered grooves 310. The end of the conical groove 310 close to the battery core is a large-diameter end, and the end far away from the battery core is a small-diameter end. The battery core passes through the tab pre-shooting assembly 300, and the first driving member 120 drives the two pressing plates 110 to move relatively. The tab pre-beating assembly 300 gathers the free end of the tab towards the axis of the battery cell through the tapered groove 310, so that the tab of the battery cell after being acted by the tab pre-beating assembly 300 has a tendency of bending towards the axis of the battery cell. The pole ear is clapped through the two-stage clapping component, so that the clapping effect of the pole ear is improved.
The method for flattening the battery cell by the tab pre-photographing assembly 300 includes two methods: and (5) leveling at a fixed pressure and at a fixed distance. The constant pressure leveling refers to maintaining a set pressure when the pressure plate 110 is in contact with the tab, and the constant distance leveling refers to that the pressure plate 110 extends out of a set distance to be in contact with the tab. The two leveling modes can be realized by the tab leveling device of the embodiment.
As shown in fig. 5, a schematic flow chart of an embodiment of the method for patting a tab in a tab pre-patting assembly 300 according to the present invention, which performs pre-treatment on a tab of a to-be-treated electrical core in a constant-pressure patting manner, includes:
s11, the lug pre-shooting assembly 300 is used for pre-treating the lug of the reference battery cell, and the stress value of a pressure plate 110 of the lug pre-shooting assembly 300 is set as a reference pressure value P1;
s12, pre-treating the electrode lug of the to-be-treated battery cell by the electrode lug pre-shooting assembly 300, wherein the first driving piece 120 of the electrode lug pre-shooting assembly 300 drives the pressing plates 110 to mutually approach, and pre-bending the electrode lug of the to-be-treated battery cell towards the axis of the electrode lug;
s13, acquiring actual pressure values (P2 and P3) of a pressure plate of the lug pre-shooting assembly;
s14, when the actual pressure values (P2 and P3) do not reach the reference pressure value P1, the first driving piece 120 corresponding to the lug pre-shooting assembly 300 continues to drive the pressing plate 110 to move;
when the actual pressure values (P2, P3) reach the reference pressure value P1, the first driving element 120 corresponding to the tab pre-shooting assembly 300 stops driving the platen 110 to move, and the pressure is stabilized for a set time T.
In step S03, the actual pressure values P2 and P3 are compared with the reference pressure value P1, respectively. When the actual pressure value P2 reaches the reference pressure value P1, the first driving element 120 corresponding to the actual pressure value P2 of the tab pre-shooting assembly 300 stops driving the pressing plate 110 to move, otherwise, the driving is continued; when the actual pressure value P3 reaches the reference pressure value P1, the first driving element 120 corresponding to the actual pressure value P3 of the tab pre-shooting assembly 300 stops driving the pressing plate 110 to move, otherwise, the driving is continued.
As shown in fig. 6, a schematic flow chart of an embodiment of the method for patting a tab in a tab pre-patting assembly 300 for pre-processing a tab of a battery cell to be processed in a fixed-distance patting manner according to the present invention includes:
s11', the lug pre-shooting assembly 300 pre-processes the lug of the reference battery cell, and the displacement driven by the first driving piece 120 of the lug pre-shooting assembly 300 is set as a second reference displacement X3;
s12', the tab pre-shooting assembly 300 pre-processes the tab of the battery cell to be processed, and the first driving piece 120 of the tab pre-shooting assembly 300 drives the pressing plate 110 to move for a second reference displacement X3.
The above step S01' may also be performed by correcting the actual displacement driven by the first driving member 120 at the tab final photographing assembly 100, so as to pretreat the tab more accurately.
In order to avoid the electric core moving in the process of flattening the pole lug and further improve the effect of flattening the pole lug, the pole lug flattening method further comprises the following steps: before the operation of the tab pre-photographing assembly 300 and the tab final photographing assembly 100, the battery cell to be processed is fixed by a clamping jaw assembly 400.
The clamping jaw assembly 400 is disposed between the two pressing plates 110, can be driven to move up and down to approach or separate from the battery cell, and can also be driven to clamp or release the battery cell. The mounting of the jaw assembly 400 is not limited, and the mounting shown in fig. 7 is taken as an example: the clamping jaw assembly 400 comprises a clamping jaw cylinder 410, and two clamping jaws 420 connected with the driving end of the clamping jaw cylinder 410, wherein the two clamping jaws 420 are provided with arc surfaces abutted against the battery core. The arrangement of the arc surface can prevent the clamping jaw 420 from damaging the battery cell. The jaw cylinder 410 is mounted on the lower surface of a horizontally disposed first mounting plate 430. Opposite second mounting plates 440 are provided on both sides in the cell conveying direction, and the first mounting plates 430 are slidably mounted on the second mounting plates 440 via a plurality of first guide rails 450. The extending direction of the first guide rail 450 is arranged along the vertical direction, and a second driving member 460 is arranged on the side of the second mounting plate 440, the driving end of the second driving member 460 is connected with the first mounting plate 430, and the driving jaw assembly 400 slides along the first guide rail 450 to approach or depart from the battery cell.
In this embodiment, the electrode tabs at the two ends of the battery cell are made of the same material, and the borne reference pressure value is the same. When the material of the lugs at the two ends of the battery cell is different, the reference pressure values born by the corresponding lugs at the two ends are different, so that the reference pressure values are respectively determined to be P1 and P1 'according to the actual material of the lugs, and the actual pressure values (P2 and P3) of the pressing plate are respectively compared with the corresponding reference pressure values P1 and P1'. And in the process of flattening the pole lug, the clamping jaw assembly 400 fixes the battery cell, bears the pressure at two ends and avoids the battery cell from moving due to different pressure values at two ends.
The above embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.
Claims (10)
1. A pole lug flattening method is characterized by comprising the following steps:
the pole lug final-photographing assembly is used for flatly photographing the pole lugs of the reference battery cell, setting the position of the reference battery cell as reference position information, and setting the displacement driven by a first driving piece of the pole lug final-photographing assembly as first reference displacement;
acquiring actual position information of the battery cell to be processed on the tab final shooting assembly;
acquiring current cell offset information according to the actual position information and the reference position information;
adjusting actual displacement driven by a first driving piece of the tab final shooting assembly according to the cell offset information and the first reference displacement;
and controlling the corresponding first driving piece to drive the pressing plate to flatten the pole lug of the cell to be processed according to the actual displacement.
2. The tab flattening method according to claim 1, wherein the setting of the reference cell position as reference position information includes: and acquiring the position information of the reference cell close to one end of the clapping camera positioning device at the tab final-shooting component as reference position information through a clapping camera positioning device.
3. The method for flattening the tab of claim 1, wherein the acquiring the actual position information of the to-be-processed battery cell in the tab final-photographing assembly comprises: and acquiring the position information of the battery cell to be processed at one end of the pole lug final shooting assembly close to the flattening camera positioning device through a flattening camera positioning device as actual position information.
4. The tab flattening method as claimed in claim 1, wherein the opposite surfaces of the pressing plates of the tab finishing assembly are flat.
5. The tab flattening method according to claim 1, further comprising, before the step of obtaining the actual position information of the battery cell to be processed in the tab final-photographing assembly:
and pretreating the lug of the battery cell to be treated through a lug pre-shooting assembly.
6. The method for flattening the tabs as claimed in claim 5, wherein the pre-processing the tabs of the battery cell to be processed through a tab pre-photographing assembly comprises:
the lug pre-shooting assembly is used for pre-treating the lug of the reference battery cell and setting a pressure plate stress value of the lug pre-shooting assembly as a reference pressure value;
the electrode lug pre-shooting assembly is used for pre-treating the electrode lugs of the battery cell to be treated, and the first driving pieces of the electrode lug pre-shooting assembly drive the pressing plates to be close to each other;
acquiring an actual pressure value of a pressure plate of the lug pre-shooting assembly;
when the actual pressure value reaches the reference pressure value, the first driving piece corresponding to the lug pre-shooting assembly stops driving the pressing plate to move, and the pressure is stabilized for a set time.
7. The method for flattening the tabs as claimed in claim 5, wherein the pre-processing the tabs of the battery cell to be processed through a tab pre-photographing assembly comprises:
the tab pre-shooting assembly is used for pre-processing tabs of the reference battery cell, and the displacement driven by the first driving piece of the tab pre-shooting assembly is set as a second reference displacement;
the electrode lug pre-shooting assembly is used for pre-treating the electrode lug of the battery cell to be treated, and the first driving piece of the electrode lug pre-shooting assembly drives the pressing plate to move for second reference displacement.
8. The method as claimed in claim 5, wherein at least one pressing plate of the tab pre-beating assembly has a tapered groove acting on the tab, and the tapered groove has a large diameter end at the end close to the cell and a small diameter end at the end far from the cell.
9. The tab flattening method according to claim 1, wherein the tab flattening method further comprises, before the step of flattening the tab of the battery cell to be processed by controlling the corresponding first driving member to drive the pressing plate according to the actual displacement: the battery core to be processed is fixed through a clamping jaw assembly.
10. The tab flattening method according to claim 5, further comprising, before the step of pretreating the tab of the cell to be treated by a tab pretreating assembly: the battery core to be processed is fixed through a clamping jaw assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211454199.6A CN115663410A (en) | 2022-11-21 | 2022-11-21 | Tab flattening method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211454199.6A CN115663410A (en) | 2022-11-21 | 2022-11-21 | Tab flattening method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115663410A true CN115663410A (en) | 2023-01-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211454199.6A Pending CN115663410A (en) | 2022-11-21 | 2022-11-21 | Tab flattening method |
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| Country | Link |
|---|---|
| CN (1) | CN115663410A (en) |
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- 2022-11-21 CN CN202211454199.6A patent/CN115663410A/en active Pending
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