CN115763995A

CN115763995A - Battery cell lamination method, device, equipment and storage medium

Info

Publication number: CN115763995A
Application number: CN202211600249.7A
Authority: CN
Inventors: 张传祥
Original assignee: Chongqing Talent New Energy Co Ltd
Current assignee: Chongqing Talent New Energy Co Ltd
Priority date: 2022-12-12
Filing date: 2022-12-12
Publication date: 2023-03-07

Abstract

The application discloses a method, a device, equipment and a storage medium for laminating a battery cell, wherein the method comprises the steps of arranging a first pole piece on a first diaphragm, and acquiring a first image of the first diaphragm after the first pole piece is arranged; arranging a second diaphragm on the first pole piece, arranging a second pole piece on the second diaphragm, and acquiring a second image of the second diaphragm after the second pole piece is arranged; determining whether a poor position exists between the first pole piece and the second pole piece based on the first image and the second image; if not, arranging another first diaphragm on the second pole piece, and repeating the steps until the stacking of the preset number of layers is completed; if so, adjusting the position of the second pole piece so that the first pole piece and the second pole piece meet the position requirement; or replacing another second pole piece so that the first pole piece and the replaced second pole piece meet the position requirement. According to the scheme, whether the first pole piece and the second pole piece have poor positions or not can be detected in real time.

Description

Battery cell lamination method, device, equipment and storage medium

Technical Field

The invention relates to the technical field of battery preparation, in particular to a method, a device, equipment and a storage medium for laminating battery cores.

Background

During production of a battery, such as but not limited to a pouch battery, a positive plate and a negative plate of the battery are separated by a separator to prevent the positive plate and the negative plate from contacting with each other, so that internal short circuit of the battery is avoided.

In addition, in the orthographic projection of negative pole piece, the positive plate need be located the within range of negative pole piece, namely, the positive plate is less than the negative pole piece, and there is certain distance between positive plate to the negative pole piece corresponding limit, this is because, if the positive plate exceeds the scope of negative pole piece, in the charging process, the lithium ion in the positive pole can restore to lithium, and constantly pile up and form lithium dendrite in the position department that surpasss the negative pole piece, lithium dendrite probably pierces through the diaphragm between positive plate and negative pole piece, form the short circuit, then take place to catch fire, safety problems such as explosion.

In order to avoid the problems, manual sampling inspection is mostly adopted for produced batteries at present, a manual sampling inspection mode is adopted, on one hand, all batteries cannot be covered, another method needs to break and tear down the sampled and inspected batteries, waste of the batteries is caused, manual measurement is adopted after breaking and tearing down, and the measurement precision is poor.

Disclosure of Invention

The application expects to provide a battery electric core's lamination method, device, equipment and storage medium, confirm whether there is the position between first pole piece and the second pole piece bad in real time at least in the lamination process, and adjust the position of second pole piece when the position is bad, perhaps, change another second pole piece, in order to satisfy the position requirement, avoid after the battery preparation is accomplished, break to tear open the battery and detect whether there is the position between first pole piece and the second pole piece bad through the selective examination, and cause the extravagant and relatively poor problem of measurement accuracy to take place.

In a first aspect, the present invention provides a method for laminating battery cells, comprising the steps of:

arranging a first pole piece on a first diaphragm, and acquiring a first image of the first diaphragm after the first pole piece is arranged;

arranging a second diaphragm on the first pole piece, arranging a second pole piece on the second diaphragm, and acquiring a second image of the second diaphragm after the second pole piece is arranged;

determining whether a poor position exists between the first pole piece and the second pole piece based on the first image and the second image;

if not, arranging another first diaphragm on the second pole piece, and repeating the steps until the stacking of the preset number of layers is completed;

if so, adjusting the position of the second pole piece so that the first pole piece and the second pole piece meet the position requirement; or replacing another second pole piece so that the first pole piece and the replaced second pole piece meet the position requirement.

As an implementation manner, the determining whether there is a poor position between the first pole piece and the second pole piece based on the first image and the second image specifically includes:

the first image comprises first position information of the first pole piece; the second image comprises second position information of the second pole piece;

determining whether the distance between corresponding edges of the first pole piece and the second pole piece is within a first preset range or not based on the first position information and the second position information, if so, determining that no position failure exists between the first pole piece and the second pole piece; if not, a poor position exists between the first pole piece and the second pole piece.

comparing the first image and the second image with a pre-prepared standard image respectively, wherein the standard image comprises an image of a first pole piece and an image of a second pole piece, and the image of the first pole piece and the image of the second pole piece are located at accurate positions in the standard image;

respectively judging whether the coincidence degree of the image of the first pole piece in the first image and the image of the first pole piece in the standard image is greater than or equal to a coincidence degree threshold value or not, and whether the coincidence degree of the image of the second pole piece in the second image and the image of the second pole piece in the standard image is greater than or equal to the coincidence degree threshold value or not, if so, the position is accurate; otherwise, there is a poor position.

respectively carrying out image recognition on the first image and the second image so as to recognize a first distance between the corresponding boundaries of the first pole piece and the first diaphragm in the first image and a second distance between the corresponding boundaries of the second pole piece and the second diaphragm in the second image;

and judging whether the difference value of the first distance and the second distance is within a preset range, if so, determining that the position is accurate, and otherwise, determining that the position is poor.

As an implementation manner, the first image further includes third position information of the first diaphragm, and based on the first position information and the third position information, it is determined whether a distance between the first pole piece and a corresponding side of the first diaphragm is within a second predetermined range, and if so, no position defect exists between the first pole piece and the first diaphragm; if not, a poor position exists between the first pole piece and the first diaphragm.

As an implementation manner, the second image further includes fourth position information of the second diaphragm, and based on the second position information and the fourth position information, it is determined whether a distance between the second pole piece and a corresponding side of the second diaphragm is within a third predetermined range, and if so, no position defect exists between the second pole piece and the second diaphragm; if not, a poor position exists between the second pole piece and the second diaphragm.

As an implementation manner, determining whether the first pole piece size is qualified or not based on the first image;

if not, polishing the current first pole piece, and replacing another first pole piece;

if so, judging whether the position of the first pole piece relative to the first diaphragm is poor or not;

if yes, correcting the deviation of the first pole piece; and/or the presence of a gas in the atmosphere,

determining whether the second diode size is acceptable based on the second image;

if not, polishing the current second pole piece, and replacing another second pole piece;

if so, judging whether the position of the second pole piece relative to the second diaphragm is poor or not;

and if so, correcting the second pole piece.

As an implementation, each of the first membranes and each of the second membranes are part of a continuous membrane strip;

after the first diaphragm is laid on the lamination table, acquiring a third image of the first diaphragm on the lamination table, wherein the third image is used as a position reference image;

when a position defect exists between the first pole piece and the first diaphragm, determining that the position defect occurs in the first diaphragm and/or the first pole piece based on the reference image and the first image;

if the first pole piece has position deviation, adjusting the position of the first pole piece so that the first pole piece meets the position requirement; or replacing the other first pole piece so that the replaced first pole piece meets the position requirement;

and if the first diaphragm has position deviation, correcting the deviation of the diaphragm belt releasing mechanism so as to enable each diaphragm laid subsequently to meet the position requirement.

As an implementation manner, the determining of the poor position occurs in the first diaphragm and/or the first pole piece, specifically:

performing difference calculation on the boundary of the first pole piece in the first image and the boundary of the position reference image, judging whether the difference value is within a first preset difference value range, and if not, determining that poor position occurs in the first pole piece; and/or the presence of a gas in the gas,

and calculating the difference between the boundary of the first diaphragm and the boundary of the position reference image, judging whether the difference value is within a second preset difference value range, and if not, generating the position defect in the first diaphragm.

when a position defect exists between the second pole piece and the second diaphragm, determining that the position defect occurs in the second diaphragm and/or the second pole piece based on the reference image and the second image;

if the second pole piece has position deviation, adjusting the position of the second pole piece so that the second pole piece meets the position requirement; or replacing another second pole piece so that the replaced second pole piece meets the position requirement;

and if the second diaphragm has position deviation, correcting the deviation of the diaphragm belt releasing mechanism so as to enable each diaphragm laid subsequently to meet the position requirement.

And as an implementation mode, acquiring the offset state of the diaphragm belt in the conveying process when each diaphragm is laid in real time, and correcting the deviation of the belt releasing mechanism of the diaphragm belt in real time when the offset is greater than a preset value so as to enable the currently laid diaphragm to meet the position requirement.

As an implementable manner, the first predetermined range is 0.7mm-1.3mm.

As an implementable manner, the second predetermined range is 0 mm-am; wherein A is the width difference between the first diaphragm and the first pole piece.

As an implementable manner, the third predetermined range is 0mm-Bmm; wherein B is the width difference between the second diaphragm and the second pole piece.

As an implementation manner, the first pole piece is transferred to the first diaphragm through a pole piece grabbing mechanism, and in the process of acquiring the first image, the grabbing state of the first diaphragm is maintained until the position of the first pole piece is judged to be correct based on the first image; or the position of the first pole piece is judged to be poor based on the first image, and after the position is adjusted to be correct by the pole piece grabbing mechanism, the pole piece grabbing mechanism releases the first pole piece and presses the first pole piece on the first diaphragm; and/or the presence of a gas in the atmosphere,

transferring the second pole piece to the second diaphragm through a pole piece grabbing mechanism, and maintaining the grabbing state of the second diaphragm in the process of acquiring the second image until the position of the second pole piece is judged to be correct based on the second image; or the position of the second pole piece is judged to be poor based on the second image, and after the position is adjusted to be correct through the pole piece grabbing mechanism, the pole piece grabbing mechanism releases the second pole piece and presses the second pole piece on the second diaphragm.

In a second aspect, the present invention provides a lamination apparatus for battery cells, comprising:

the pole piece grabbing mechanism is used for arranging the first pole piece on the first diaphragm and arranging the second pole piece on the second diaphragm;

an image acquisition unit for acquiring a first image of the first diaphragm after the first pole piece is arranged and a second image of the second diaphragm after the second pole piece is arranged;

the control unit is used for determining whether a poor position exists between the first pole piece and the second pole piece or not based on the first image and the second image;

if not, controlling the pole piece grabbing mechanism to continue stacking the rest first pole pieces and the rest second pole pieces until the stacking of the preset number of layers is completed;

if so, controlling the pole piece grabbing mechanism to adjust the position of the second pole piece so that the first pole piece and the second pole piece meet the position requirement; or, another second pole piece is replaced, so that the first pole piece and the replaced second pole piece meet the position requirement.

The lamination device for a battery cell provided in each example of the present invention is used to implement the above lamination method for a battery cell, and the working principle and effect of the lamination device for a battery cell may refer to the above method example, which is not described herein again.

As an implementation manner, the control unit is configured to determine whether there is a poor position between the first pole piece and the second pole piece based on the first image and the second image, specifically:

respectively judging whether the contact ratio of the image of the first pole piece in the first image and the image of the first pole piece in the standard image is greater than or equal to a contact ratio threshold value or not, and whether the contact ratio of the image of the second pole piece in the second image and the image of the second pole piece in the standard image is greater than or equal to the contact ratio threshold value or not, if so, the position is accurate; otherwise, there is a poor position.

image recognition is performed on the first image and the second image respectively to identify a first distance between 5 first pole pieces in the first image and a boundary corresponding to the first diaphragm, and a second pole piece in the second image and the boundary corresponding to the first diaphragm

A second distance between corresponding boundaries of the second diaphragm;

As an implementation, the first image further includes third position information of the first diaphragm; 0 the control unit further configured to determine the position based on the first position information and the third position information

Whether the distance between the first pole piece and the corresponding edge of the first diaphragm is within a second preset range or not, if so, no position defect exists between the first pole piece and the first diaphragm; if not, a poor position exists between the first pole piece and the first diaphragm.

As an implementation, the second image further includes fourth position information of the second diaphragm; 5 the control unit is further configured to determine the position based on the second position information and the fourth position information

Whether the distance between the corresponding edges of the second pole piece and the second diaphragm is within a third preset range or not, and if so, no position defect exists between the second pole piece and the second diaphragm; and if not, determining that the position between the second pole piece and the second diaphragm is poor.

As an implementation manner, the control unit is further configured to determine whether the first 0 pole piece size is qualified based on the first image;

if not, controlling the pole piece grabbing mechanism to throw the current first pole piece, and replacing the other first pole piece;

if so, controlling the pole piece grabbing mechanism to correct the deviation of the first pole piece; and/or, 5 determining whether the second pole piece size is qualified based on the second image;

if not, controlling the pole piece grabbing mechanism to throw the current second pole piece, and replacing the other second pole piece;

if yes, the pole piece grabbing mechanism is controlled to correct the deviation of the second pole piece.

0 as an implementable manner, each of the first membranes and each of the second membranes are each in a continuous strip of membranes

A part (c);

the image acquisition unit is further configured to acquire a third image of the first diaphragm on the lamination stage after the first diaphragm is laid on the lamination stage, and the third image is used as a position reference image;

the control unit is further used for determining that the poor position occurs in the first diaphragm and/or the first pole piece based on the reference image and the first image when the poor position exists between the first pole piece and the first diaphragm;

if the first pole piece has position deviation, controlling the pole piece grabbing mechanism to adjust the position of the first pole piece so that the first pole piece meets the position requirement; or replacing the other first pole piece so that the replaced first pole piece meets the position requirement;

and if the first diaphragm has position deviation, controlling a belt releasing mechanism of the diaphragm belt to correct the deviation so as to enable each diaphragm laid subsequently to meet the position requirement.

As an implementation manner, the control unit is configured to determine that the poor position occurs in the first diaphragm and/or the first pole piece, specifically:

the boundary of the first pole piece in the first image is subtracted from the boundary of the position reference image, whether the difference value is within a first preset difference value range is judged, and if not, poor position occurs in the first pole piece; and/or the presence of a gas in the gas,

and calculating the difference between the boundary of the first diaphragm and the boundary of the position reference image, judging whether the difference value is within a second preset difference value range, and if not, determining that the position failure occurs in the first diaphragm.

the control unit is further used for determining that the position failure occurs in the second diaphragm and/or the second pole piece based on the reference image and the second image when the position failure exists between the second pole piece and the second diaphragm;

if the second pole piece has position deviation, controlling the pole piece grabbing mechanism to adjust the position of the second pole piece so that the second pole piece meets the position requirement; or, another second pole piece is replaced, so that the replaced second pole piece meets the position requirement;

and if the second diaphragm has position deviation, controlling a belt releasing mechanism of the diaphragm belt to correct the deviation so as to enable each diaphragm laid subsequently to meet the position requirement.

As an implementation manner, the diaphragm deviation detection sensor is used for acquiring the deviation state of the diaphragm belt in the conveying process when the diaphragms are laid in real time;

and the control unit is also used for controlling the belt releasing mechanism of the diaphragm belt to carry out real-time deviation correction when the offset is greater than a preset value, so that the currently laid diaphragm meets the position requirement.

In a third aspect, the present invention provides a terminal device, including: one or more processors; a memory for storing one or more programs; the one or more programs, when executed by the one or more processors, cause the one or more processors to perform the methods as described above.

In a fourth aspect, the invention provides a computer-readable storage medium having stored thereon a computer program for implementing the method as described above.

According to the scheme, in the lamination process, the first image and the second image are obtained in real time, whether the position between the first pole piece and the second pole piece is poor is determined based on the first image and the second image, the position of the second pole piece is adjusted when the position is poor, or the other second pole piece is replaced, the position requirements are met by the first pole piece and the second pole piece, the selective inspection of the battery in a breaking and dismantling mode is not needed after the battery is manufactured, therefore, the problem that the battery is wasted and the measuring accuracy is poor due to the fact that the battery is detected whether the position between the first pole piece and the second pole piece is poor by breaking and dismantling the battery through the selective inspection after the battery is manufactured is avoided.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:

FIG. 1 is a schematic view of a lamination apparatus provided by an embodiment of the present invention;

fig. 2 is a top view of a battery cell provided in an embodiment of the invention;

fig. 3 is a flowchart of a method for stacking battery cells according to an embodiment of the present invention;

fig. 4 is a schematic block diagram of a lamination device of a battery cell according to an embodiment of the present invention;

fig. 5 is a schematic diagram of a terminal device according to an embodiment of the present invention.

Detailed Description

The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.

It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

The method of laminating the battery cells of the present invention may be carried out by the laminating apparatus described below. As shown in fig. 1, the lamination device includes a lamination table 1, wherein the left and right sides of the lamination table 1 are respectively provided with a pole piece placing table 2 and a pole piece placing table 3, each pole piece placing table 2 and 3 corresponds to one

manipulator

6 and 7, which can be used as a pole piece grabbing mechanism, and the

manipulators

6 and 7 are used for transferring pole pieces placed on the pole piece placing tables 2 and 3 to the lamination table 1 for lamination operation of the battery cells. The lamination table 1 is provided with a tape releasing mechanism 8, and a whole roll of diaphragm tape 81 is arranged in the tape releasing mechanism 8 for arranging the diaphragm tape 81 between the adjacent pole pieces. A Charge-coupled Device (CCD) camera 9 may be provided at a position corresponding to the lamination stage 1, and may serve as an image acquisition unit for photographing an object placed on the lamination stage 1. The installation position of the CCD camera 9 is not limited here, as long as the object placed on the lamination stage 1 can be photographed.

Wherein, two pole pieces are arranged on the

platforms

2 and 3, one of which is provided with a positive pole piece, and the other is provided with a negative pole piece. Generally, the pole piece placing tables 2 and 3 can adjust the positions of the pole pieces placed on the pole piece placing tables to ensure that the positions of the pole pieces are in a relatively accurate state before the pole pieces are grabbed by the

mechanical arms

6 and 7, so that lamination errors are reduced.

The manipulator can adopt any existing manipulator with any structure, is not limited uniquely here, and only needs to be provided with a vacuum chuck, can adsorb the pole piece and release the pole piece to a preset position.

In the example of fig. 1, the

robot arms

6, 7 can slide in the left-right direction, and the vacuum cups 61, 71 thereof can move up and down.

When the lamination device is used for lamination, at least the lower part of the tape placing mechanism 8 (for example, the lower part is a film laying mechanism) translates left and right, in other examples, the tape placing mechanism 8 may translate left and right integrally, so as to lay a section of membrane tape 81 on the lamination table 1, for example, but not limited to, firstly, moving from left to right (the same reverse direction is used, and the description is omitted), and lay a section of membrane tape 81 on the lamination table 1 (for convenience of description, the section of membrane tape 81 may be referred to as a first membrane 10, and of course, in other examples, may be referred to as a second membrane 11); then, the left hand robot 6 sucks one pole piece (for example, but not limited to, the pole piece on the left hand pole piece placement stage may be referred to as a first pole piece 4) from the left hand pole piece placement stage 2 and moves right to the first diaphragm 10, then the vacuum chuck 61 of the left hand robot 6 carries the first pole piece 4 to move down to stack the first pole piece 4 on the first diaphragm 10, and then the left hand robot 6 resets to the left hand pole piece placement stage 2 to suck another first pole piece 4 to prepare for stacking the first pole piece 4 next time; meanwhile, the tape placing mechanism 8 moves at least the lower portion from right to left again, and lays another piece of diaphragm tape 81 on the first pole piece 4 (for convenience of description, this piece of diaphragm tape 81 may be referred to as a second diaphragm 11, and of course, in other examples, it may also be referred to as a first diaphragm 10), whereupon the manipulator 7 on the right adsorbs one pole piece from the pole piece placement stage 3 on the right (for example, but not limited to, the pole piece on the pole piece placement stage 3 on the right may be referred to as a second pole piece 5), and moves to the left onto the second diaphragm 11, then the vacuum chuck tape 71 of the manipulator 7 moves downward along with the second pole piece 5 to stack the second pole piece 5 onto the second diaphragm 11, and then the manipulator 7 on the right resets to the pole piece placement stage 3 on the right to adsorb another second pole piece 5, and prepares for stacking the second pole piece 5 next time. Repeating the above process, reciprocating the tape releasing mechanism 8 to move the diaphragm tape 81 in a zigzag manner at least from the lower part to the left and right, so as to lay the corresponding diaphragm between the first pole piece 4 and the second pole piece 5 until the first pole piece 4 and the second pole piece 5 with the preset number of layers are stacked, thereby completing the lamination process of the battery cell.

In order to clearly show the laminated relationship of the first pole piece 4, the second pole piece 5, the first diaphragm 10 and the second diaphragm 11 and the zigzag displacement of the diaphragm tape 81 forming the first diaphragm 10 and the second diaphragm 11, in fig. 1, a gap is drawn between any adjacent two of the first pole piece 4, the second pole piece 5, the first diaphragm 10 and the second diaphragm 11, and in an actual product, any adjacent two are closely attached together.

One of the first pole piece 4 and the second pole piece 5 is a positive pole piece, and the other is a negative pole piece. In this invention example, the first pole piece 4 is taken as a negative pole piece, and the second pole piece 5 is taken as a positive pole piece; otherwise, the same reason is not described herein.

In the lamination process, as shown in fig. 2, in order to prevent the positive plate (the second pole piece 5 in this example) from exceeding the range of the negative plate (the first pole piece 4 in this example), so that lithium ions in the positive electrode can be reduced into lithium and continuously accumulated at a position exceeding the negative plate to form lithium dendrites during the charging process of the subsequent battery, the lithium dendrites may pierce through a separator between the positive plate and the negative plate to form a short circuit, and safety problems such as ignition, explosion and the like may occur; the invention adopts the following method for laminating battery cores.

Specifically, referring to at least fig. 3, the method for stacking battery cells provided by the present invention includes the following steps:

s1: a first pole piece 4 is arranged on a first membrane 10 and a first image of the first membrane 10 is acquired after arranging the first pole piece 4.

For example, the first pole piece 4 is transferred to the first diaphragm by a manipulator 6 as a pole piece gripping mechanism, and a gripping state of the first diaphragm 4 is maintained during the process of acquiring the first image by a CCD camera 9 as an image acquisition unit until the first pole piece 4 is judged to be correctly positioned based on the first image; or the position of the first pole piece 4 is judged to be bad based on the first image, and after the position is adjusted to be correct by the pole piece grabbing mechanism, the pole piece grabbing mechanism releases the first pole piece 4 and presses the first pole piece 4 on the first diaphragm 10.

For the determination of the position defect, the following description can be referred to.

Specifically, the manipulator 6 places the first pole piece 4 on the first diaphragm 10, and the CCD camera 9 takes a picture to obtain a first image of the first diaphragm 10 after the first pole piece 4 is placed, that is, the first image includes both the image of the first pole piece 4 and the image of the first diaphragm 10.

When shooting is carried out through the CCD camera 9, the vacuum chuck 61 of the manipulator 6 can be in a state without pressure release, that is, the manipulator 6 does not release the first pole piece 4 to the first diaphragm 10, and is in a state of maintaining the first pole piece 4 in a grabbing state, so that position fine adjustment of the first pole piece 4 is facilitated when poor position is determined in the follow-up process, and after the position fine adjustment is proper, the vacuum chuck 61 of the manipulator 6 is further pressure released to release the first pole piece 4 and press the first pole piece 4 on the first diaphragm 10.

S2: a second membrane 11 is arranged on the first pole piece 4, and a second pole piece 5 is arranged on the second membrane 11, and a second image of the second membrane 11 is acquired after the second pole piece 5 is arranged.

After a piece of the first pole piece 4 is stacked, the tape placing mechanism 8 translates at least the lower part left and right, and in other examples, a length of the diaphragm tape 81 is laid on the first pole piece 4, and the diaphragm tape 81 laid on the first pole piece 4 can be called as a second diaphragm 11.

Transferring the second pole piece 5 to the second diaphragm 11 through a pole piece grabbing mechanism, and maintaining the grabbing state of the second diaphragm 11 in the process of acquiring the second image until the position of the second pole piece 5 is judged to be correct based on the second image; or the position of the second pole piece 5 is judged to be bad based on the second image, and after the position is adjusted to be correct by the pole piece grabbing mechanism, the pole piece grabbing mechanism releases the second pole piece 5 and presses the second pole piece 5 on the second diaphragm 11

Specifically, the second pole piece 5 is placed on the second diaphragm 11 by another manipulator 7, and the CCD camera 9 takes a picture to obtain a second image of the second diaphragm 11 after the second pole piece 5 is placed, that is, the second image includes both the image of the second pole piece 5 and the image of the second diaphragm 11.

When shooting is performed through the CCD camera 9, the vacuum chuck 71 of the manipulator 7 may be in a state where no pressure is released, that is, the manipulator 7 does not release the second pole piece 5 onto the second diaphragm 11, and is in a state where the second pole piece 5 is held in a grasping state, so that it is beneficial to perform position fine adjustment on the second pole piece 5 when poor position is determined in the subsequent process, and after the position fine adjustment is appropriate, the vacuum chuck 71 of the manipulator 7 releases the pressure again to release the second pole piece 5 and press the second pole piece 5 onto the second diaphragm 11.

S3: determining whether there is a poor position between the first pole piece 4 and the second pole piece 5 based on the first image and the second image;

the first image and the second image may be compared with a standard image prepared in advance to determine whether there is a poor position between the first pole piece 4 and the second pole piece 5.

The standard image referred to herein may refer to an image of the first pole piece 4 and the second pole piece 5, and the first pole piece 4 and the second pole piece 5 are located at accurate positions in the standard image. Whether a poor position exists between the first pole piece 4 and the second pole piece 5 can be judged according to the coincidence degree of the images of the first pole piece 4 and the second pole piece 5 in the first image and the second image and the images of the first pole piece 4 and the second pole piece 5 in the standard image, if the coincidence degree is high, for example, greater than or equal to a coincidence degree threshold value, the value can be determined according to the actual situation, the position is accurate, and otherwise, the position is poor.

Of course, the boundaries of the first pole piece 4 and the first diaphragm 10 in the first image and the boundaries of the second pole piece 5 and the second diaphragm 11 in the second image may be respectively identified by means of image identification, and the first distance between the boundaries corresponding to the first pole piece 4 and the first diaphragm 10 and the second distance between the boundaries corresponding to the second pole piece 5 and the second diaphragm 11 may be determined according to the actual distance represented by one pixel, which is calibrated in advance, and the first distance and the second distance may also be determined according to a camera coordinate system, an image coordinate system and the like of the CCD camera 9, where they are not uniquely defined. For example, but not limited to, if the distance difference between the two is within a predetermined range, the position is accurate, otherwise, the position is poor.

S4: if not, another first diaphragm 10 is arranged on the second pole piece 5, and the steps are repeated until the stacking of the preset number of layers is completed;

s5: if yes, adjusting the position of the second pole piece 5, so that the first pole piece 4 and the second pole piece 5 meet the position requirement; or, another second pole piece 5 is replaced, so that the first pole piece 4 and the replaced second pole piece 5 meet the position requirement.

When the position is poor, the position of the second pole piece 5 can be adjusted by a manipulator, and after the position of the second pole piece 5 is accurate, the second pole piece 5 is released onto the second diaphragm 11, so that the first pole piece 4 and the second pole piece 5 meet the position requirement.

In some cases, the position deviation of the second pole piece 5 is too large and exceeds the range of position adjustment that can be performed by the manipulator 7, at this time, the manipulator 7 performs the piece polishing process on the second pole piece 5, and another second pole piece 5 is replaced, so that the first pole piece 4 and the replaced second pole piece 5 meet the position requirement.

In the process, the manipulator 7 can be reset to eliminate movement accumulated errors caused by repeated movement of the manipulator 7, so that the accuracy of the placement of the corresponding pole piece position is improved.

Above-mentioned scheme, in the in-process of lamination, real-time first image and the second image of acquireing, and based on first image and second image, confirm whether there is the position between first pole piece 4 and the second pole piece 5 bad, and adjust the position of second pole piece 5 when the position is bad, perhaps, change another second pole piece 5, satisfy the position requirement with first pole piece 4 and second pole piece 5, need not to carry out the selective examination of broken mode of tearing open again to the battery after the battery preparation is accomplished, therefore, avoided after the battery preparation is accomplished, break to tear open the battery through the selective examination and detect whether there is the position bad between first pole piece 4 and the second pole piece 5, and cause the extravagant and relatively poor problem of measurement accuracy of battery to take place.

As an implementation manner, the determining whether there is a poor position between the first pole piece 4 and the second pole piece 5 based on the first image and the second image specifically includes:

the first image comprises first position information of the first pole piece 4; the second image comprises second position information of the second pole piece 5.

Determining whether the distance between the corresponding sides of the first pole piece 4 and the second pole piece 5 is within a first preset range or not based on the first position information and the second position information, if so, determining that no poor position exists between the first pole piece 4 and the second pole piece 5; if not, a poor position exists between the first pole piece 4 and the second pole piece 5.

For example, but not limited to, the CCD camera 9 may be calibrated in advance to determine the distance represented by one pixel in the image captured by the CCD camera. Then, after the first image and the second image are obtained by the CCD camera 9, the first image and the second image are respectively subjected to image recognition, and the boundaries of the first pole piece 4 and the second pole piece 5 are recognized.

In the identification, the first pole piece 4 and the second pole piece 5 can be identified by adopting a pre-trained image identification model. Because the first pole piece 4 and the second pole piece 5 have different colors, the boundary between the first pole piece 4 and the second pole piece 5 can be identified by the difference of the pixel gray levels.

Since the CCD camera 9 is calibrated before use, the distance represented by each pixel in the image thereof is known, and after the boundary between the first pole piece 4 and the second pole piece 5 is identified, which pixels are also determined in the boundary, the first position information of the first pole piece 4 can be known by these pixels; the second image comprises second position information of the second pole piece 5; wherein, the first position information here can refer to the coordinate values of each point of the boundary of the first pole piece 4; the second position information may refer to coordinate values of points on the boundary of the second pole piece 5.

The difference is obtained between the first position information and the second position information, whether the distance between the corresponding edges of the first pole piece 4 and the second pole piece 5 is within a first preset range or not is determined according to the difference, and if yes, no poor position exists between the first pole piece 4 and the second pole piece 5; if not, a poor position exists between the first pole piece 4 and the second pole piece 5.

In addition to determining whether there is a poor position between the first pole piece 4 and the second pole piece 5, in order to prevent the first pole piece 4 and the second pole piece 5 from contacting and causing a short circuit, it is further required to determine whether there is a poor position between the first diaphragm 10 and the first pole piece 4 and whether there is a poor position between the second diaphragm 11 and the second pole piece 5; so as to ensure that the corresponding diaphragm can completely cover the corresponding pole piece, and ensure that the adjacent pole pieces keep good insulation.

As an implementation manner, in addition to determining whether there is a poor position between the first pole piece 4 and the second pole piece 5 and whether there is a poor position between the first diaphragm 10 and the first pole piece 4, it is further required to determine whether the first pole piece and the second pole piece are qualified in size each time one first pole piece and one second pole piece is placed, so as to avoid scrapping of the battery due to placing the first pole piece and the second pole piece which are unqualified in size, and determine whether there is a poor position relative to the corresponding first diaphragm and the corresponding second diaphragm under the condition that the first pole piece and the second pole piece are qualified in size.

Specifically, based on the first image, determining whether the first pole piece size is qualified;

for example, but not limited to, the size of the first pole piece may be determined by means of image recognition, and the identified size of the first pole piece is compared with a predetermined standard size, and if the size of the first pole piece is consistent with the predetermined standard size, the first pole piece is qualified, otherwise, the first pole piece is not qualified.

If not, the current first pole piece is polished, and the other first pole piece is replaced.

If the size of the current first pole piece is not qualified, the current first pole piece is abandoned, another first pole piece is replaced, and the steps are repeated after the first pole piece is replaced to determine whether the replaced first pole piece is qualified.

If so, judging whether the position of the first pole piece relative to the first diaphragm is bad.

And when the position of the first pole piece relative to the first diaphragm is poor, rectifying the deviation of the first pole piece, and then performing the subsequent stacking step of the second diaphragm after rectifying the deviation. The method for determining whether the position of the first pole piece relative to the first diaphragm is poor is described below. And/or the presence of a gas in the gas,

determining whether the second diode size is acceptable based on the second image.

For example, but not limited to, the size of the second pole piece may be determined by means of image recognition, and the identified size of the second pole piece is compared with a predetermined standard size, and if the size of the second pole piece is consistent with the predetermined standard size, the second pole piece is qualified, otherwise, the second pole piece is not qualified.

And if not, polishing the current second pole piece, and replacing the other second pole piece.

If the current second pole piece is unqualified in size, the second pole piece is discarded and replaced by another second pole piece, and the steps are repeated after the second pole piece is replaced to determine whether the replaced second pole piece is qualified.

and when the position of the second pole piece relative to the second diaphragm is poor, rectifying the deviation of the second pole piece. The method of determining whether the position of the second pole piece with respect to the second diaphragm is poor is described below.

Specifically, it is determined whether a position defect exists between the first diaphragm 10 and the first pole piece 4, in such a manner that the first image further includes third position information of the first diaphragm 10, and based on the first position information and the third position information, it is determined whether a distance between the first pole piece 4 and a corresponding side of the first diaphragm 10 is within a second predetermined range, and if so, no position defect exists between the first pole piece 4 and the first diaphragm 10; if not, a poor position exists between the first pole piece 4 and the first diaphragm 10.

Specifically, it is determined whether a position defect exists between the second film and the second pole piece 5, in such a manner that the second image further includes fourth position information of the second diaphragm 11, and based on the second position information and the fourth position information, it is determined whether a distance between the second pole piece 5 and a corresponding side of the second diaphragm 11 is within a third predetermined range, and if yes, there is no position defect between the second pole piece 5 and the second diaphragm 11; if not, a position failure exists between the second pole piece 5 and the second diaphragm 11.

The method for determining the third location information and the fourth location information may be the same as the method for determining the first location information and the second location information, and is not repeated herein.

As an implementation, each of the first membranes 10 and each of the second membranes 11 is a portion of a continuous membrane strip 81;

after the first diaphragm 10 is laid on the lamination table 1, acquiring a third image of the first diaphragm 10 on the lamination table 1, wherein the third image is used as a position reference image;

when there is a positional defect between the first pole piece 4 and the first diaphragm 10, it is determined that the positional defect occurs in the first diaphragm 10 and/or the first pole piece 4 based on the reference image and the first image.

When a position failure occurs, for example, but not limited to, the boundary of the first pole piece 4 in the first image is subtracted from the boundary of the position reference image, and whether the difference is within a first predetermined difference range is determined, if not, the position failure occurs in the first pole piece 4, that is, the boundary of the first pole piece 4 is subtracted from the boundary of the position reference image, so as to determine whether the position of the first pole piece 4 is failed (that is, whether the position has a deviation) according to the difference.

Or, the boundary of the first diaphragm 10 and the boundary of the position reference image may be subtracted to determine whether the difference is within a second predetermined difference range, and if not, the position defect occurs in the first diaphragm 10, that is, the boundary of the first diaphragm 10 and the boundary of the position reference image are subtracted to determine whether the position of the first diaphragm 10 is defective according to the difference.

Various numerical values and numerical ranges herein, such as a first predetermined range of differences. The second predetermined difference range, etc. may be determined as a practical matter.

If the first pole piece 4 has a position deviation, adjusting the position of the first pole piece 4 to enable the first pole piece 4 to meet the position requirement; or, another first pole piece 4 is replaced, so that the replaced first pole piece 4 meets the position requirement;

if the first diaphragm 10 has a position deviation, the deviation of the belt releasing mechanism 8 of the diaphragm belt 81 is corrected, so that each diaphragm laid subsequently meets the position requirement.

As a practical matter, each of the first membranes 10 and each of the second membranes 11 is a portion of a continuous membrane strip 81;

determining that a position defect occurs in the second diaphragm 11 and/or the second pole piece 5 based on the reference image and the second image when a position defect exists between the second pole piece 5 and the second diaphragm 11;

if the second pole piece 5 has a position deviation, adjusting the position of the second pole piece 5 so that the second pole piece 5 meets the position requirement; or, another second pole piece 5 is replaced, so that the replaced second pole piece 5 meets the position requirement;

if the second diaphragm 11 has a position deviation, the tape releasing mechanism 8 of the diaphragm tape 81 is corrected so that each diaphragm laid subsequently meets the position requirement.

As an implementation manner, the deviation state of the diaphragm belt 81 in the conveying process when each diaphragm is laid is obtained in real time, and when the deviation amount is greater than a preset value, the belt releasing mechanism 8 of the diaphragm belt 81 is corrected in real time, so that the currently laid diaphragm meets the position requirement.

In order to prevent the membrane tape 81 from deviating during the transportation process, a sensor may be provided in the tape feeding mechanism 8 to detect the position of the membrane tape 81 in real time. For example, a correlation sensor as a diaphragm deviation detection sensor may be disposed at an edge position of the diaphragm tape 81, and if the correlation sensor is blocked, that is, the deviation amount is greater than a predetermined value, during the transportation of the diaphragm tape 81, the position deviation of the diaphragm tape 81 is described, and the deviation of the diaphragm tape 81 may be corrected by a deviation correction mechanism in the tape unwinding mechanism 8.

As an implementable manner, the first predetermined range is 0.7mm to 1.3mm.

As an implementation, the second predetermined range is 0 mm-am; where a is the width difference between the first membrane 10 and the first pole piece 4.

As an implementable manner, the third predetermined range is 0mm-Bmm; where B is a width difference between the second diaphragm 11 and the second pole piece 5.

The method for laminating the battery cells according to the invention, as shown in fig. 1 to 3, is described in the following by way of example in one of the specific implementations, which should not be construed as the only limitation of the invention.

In this example, the first pole piece 4 is a negative pole piece, and the width of the negative pole piece is 97.5mm; the second pole piece 5 is a positive pole piece, and the width of the second pole piece is 95.5mm; the width of the membrane tape 81 is 100mm.

The negative electrode plate is placed on the left electrode plate placing table 6, and the positive electrode plate is placed on the right electrode plate placing table 7.

After lamination starts, at least the lower part of the belt placing mechanism 8 translates from left to right to lay a section of diaphragm belt 81 on the lamination table 1, wherein the section of diaphragm belt 81 can be called as a first diaphragm 10, then a CCD camera 9 shoots and obtains a third image of the first diaphragm 10 on the lamination table 1, and the third image is used as a position reference image and is used as a reference for position accuracy judgment of subsequent pole pieces and diaphragms.

Left manipulator 6 snatchs a slice negative pole piece from left pole piece placing table 2 to right movement moves on moving the negative pole piece to first diaphragm 10, at this moment, shoots through above-mentioned CCD camera 9 to obtain the first image of first diaphragm 10 behind the negative pole piece that has set up, when shooing through CCD camera 9, manipulator 6's vacuum chuck 61 can be in the state of not relieving pressure, also the manipulator 6 does not release the negative pole piece on first diaphragm 10. After determining that the position between the negative plate and the first diaphragm 10 is good according to the first image, the vacuum chuck 61 of the manipulator 6 releases the pressure to release the negative plate and press the negative plate on the first diaphragm 10, otherwise, the manipulator 6 adjusts the position of the negative plate. Wherein the first image further includes third position information of the first diaphragm 10, and based on the first position information and the third position information, it is determined whether the distance between the negative electrode sheet and the corresponding side of the first diaphragm 10 is within a second predetermined range, where the second predetermined range may be 0mm to 2.5mm, and may preferably be 0.5mm to 2mm, and if so, no position failure exists between the first electrode sheet 4 and the first diaphragm 10; if not, a position failure exists between the first pole piece 4 and the first diaphragm 10.

After the negative pole pieces are placed in place, at least the lower portion of the band releasing mechanism 8 translates from right to left to lay a section of diaphragm band 81 on the negative pole pieces, the section of diaphragm band 81 can be called as a second diaphragm 11, then the right manipulator 7 grabs a positive pole piece from the right pole piece placing table 3 and moves left to move the positive pole piece to the second diaphragm 11, at the moment, the CCD camera 9 shoots to obtain a second image of the second diaphragm 11 after the positive pole piece is arranged, when the CCD camera 9 shoots, a vacuum chuck of the manipulator 7 can be in a state without pressure release, namely the manipulator 7 does not release the positive pole piece to the second diaphragm 11. After the position between the positive plate and the second diaphragm 11 is determined to be good and the positions of the positive plate and the negative plate are determined to be good according to the second image, the vacuum chuck 71 of the manipulator 7 releases the pressure to release the positive plate and press the positive plate on the second diaphragm 11, otherwise, the manipulator 7 adjusts the position of the positive plate. The second image further includes fourth position information of the second diaphragm 11, and based on the second position information and the fourth position information, it is determined whether the distance between the positive electrode sheet and the corresponding side of the second diaphragm 11 is within a third predetermined range, where the third predetermined range may be 0mm to 4.5mm, and may preferably be 1.5mm to 3mm, and if so, no position defect exists between the positive electrode sheet and the second diaphragm 11; if not, a position failure exists between the positive electrode plate and the second separator 11. In addition, whether the distance between the corresponding edges of the positive pole piece and the negative pole piece is within a first preset range is determined according to the first position information and the second position information, the first preset range can be 0.7mm-1.3mm, and if yes, no position failure exists between the first pole piece 4 and the second pole piece 5; if not, a poor position exists between the first pole piece 4 and the second pole piece 5.

Under the condition that no position defects exist, the steps of stacking the first diaphragm 10, the negative pole piece, the second diaphragm 11 and the positive pole piece are repeated until the stacking of the preset number of layers is completed; the separator tape 81 is cut after the stacking is completed to perform the next cell stacking.

In the stacking process, in order to prevent the deviation of the membrane tape 81 during the transfer process, a sensor may be provided in the tape feeding mechanism 8 to detect the position of the membrane tape 81 in real time. For example, a correlation sensor may be provided at the edge position of the diaphragm tape 81, and if the correlation sensor is blocked, that is, the offset amount is greater than a predetermined value during the transportation of the diaphragm tape 81, the positional offset of the diaphragm tape 81 is described, and the diaphragm tape 81 may be corrected by the correction mechanism in the tape placing mechanism 8.

In a second aspect, as shown in fig. 4, the present invention provides a lamination device for battery cells, including:

if so, controlling the pole piece grabbing mechanism to adjust the position of the second pole piece so that the first pole piece and the second pole piece meet the position requirement; or replacing another second pole piece so that the first pole piece and the replaced second pole piece meet the position requirement.

The lamination device for a battery cell provided in each example of the present invention is used to implement the lamination method for a battery cell, and the working principle and effect of the lamination device for a battery cell may refer to the above method example, which is not described herein again.

respectively judging whether the coincidence degree of the image of the first pole piece in the first image and the image of the image 5 of the first pole piece in the standard image is greater than or equal to a coincidence degree threshold value, and judging whether the image of the second pole piece in the second image and the image of the second pole piece in the standard image are greater than or equal to a coincidence degree threshold value

Whether the contact ratio of the image of the second pole piece in the standard image is greater than or equal to the contact ratio threshold value or not is judged, and if yes, the position is accurate; otherwise, there is a bad position.

As an implementation manner, the control unit is configured to determine whether there is a poor position between the first pole piece and the second pole piece based on the first image and the second image, specifically: 0 respectively performing image recognition on the first image and the second image to recognize the first image

A first distance between corresponding boundaries of the first pole piece and the first diaphragm, and a second distance between corresponding boundaries of the second pole piece and the second diaphragm in the second image;

5 as an implementation, the first image further includes third position information of the first diaphragm;

the control unit is further configured to determine whether a distance between the first pole piece and a corresponding side of the first diaphragm is within a second predetermined range based on the first position information and the third position information, and if so, no position defect exists between the first pole piece and the first diaphragm; if not, a poor position exists between the first pole piece and the first diaphragm.

0 as an implementable way, the second image further includes fourth positional information of the second diaphragm;

the control unit is further configured to determine whether a distance between the second pole piece and a corresponding side of the second diaphragm is within a third predetermined range based on the second position information and the fourth position information, and if so, no position defect exists between the second pole piece and the second diaphragm; and if not, determining that the position between the second pole piece and the second diaphragm is poor.

5 as an implementation manner, the control unit is further configured to determine the first image based on the first image

Whether the size of the pole piece is qualified or not;

if 0, controlling the pole piece grabbing mechanism to correct the deviation of the first pole piece; and/or the presence of a gas in the gas,

determining whether the second diode size is qualified based on the second image;

the boundary of the first pole piece in the first image is subtracted from the boundary of the position reference image, whether the difference value is within a first preset difference value range is judged, and if not, poor position occurs in the first pole piece; and/or the presence of a gas in the atmosphere,

the image acquisition unit is further configured to acquire a third image of the first diaphragm on the lamination stage after the first diaphragm is laid on the lamination stage, where the third image is used as a position reference image;

and if the second diaphragm has position deviation, controlling a diaphragm belt releasing mechanism of the diaphragm belt to correct the deviation so as to enable each subsequently laid diaphragm to meet the position requirement.

and the control unit is also used for controlling the belt releasing mechanism of the diaphragm belt to perform real-time deviation correction when the offset is greater than a preset value, so that the currently laid diaphragm meets the position requirement.

In a third aspect, the present invention provides a terminal device, including: one or more processors; a memory for storing one or more programs; the one or more programs, when executed by the one or more processors, cause the one or more processors to perform the method of stacking battery cells as described above.

As shown in fig. 5, the terminal device 500 includes a Central Processing Unit (CPU) 501 that can perform various appropriate actions and processes in accordance with a program stored in a Read Only Memory (ROM) 502 or a program loaded from a storage section 508 into a Random Access Memory (RAM) 503. In the RAM 503, various programs and data necessary for the operation of the system 500 are also stored. The CPU 501, ROM 502, and RAM 503 are connected to each other through a bus 504. An input/output (I/O) interface 505 is also connected to bus 504.

The following components are connected to the I/O interface 505: an input section 506 including a keyboard (which may be a virtual keyboard) and the like; an output portion 507 including a display such as a Cathode Ray Tube (CRT), a Liquid Crystal Display (LCD), and the like, and a speaker; a storage portion 508 including a hard disk and the like; and a communication section 509 including a network interface card such as a LAN card, a modem, or the like. The communication section 509 performs communication processing via a network such as the internet. The driver 510 is also connected to the I/O interface 505 as necessary. A removable medium 511 such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, or the like is mounted on the drive 510 as necessary, so that a computer program read out therefrom is mounted into the storage section 508 as necessary.

In particular, the processes described by the above methods may be implemented as computer software programs, according to embodiments of the present disclosure. For example, embodiments of the present disclosure include a method of stacking battery cells including a computer program tangibly embodied on a machine-readable medium, the method of stacking battery cells including program code for performing the method. In such an embodiment, the computer program may be downloaded and installed from a network through the communication section 509, and/or installed from the removable medium 511.

The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.

The units or modules described in the embodiments of the present application may be implemented by software or hardware. The described units or modules may also be provided in a processor.

In a fourth aspect, the present application further provides a computer-readable storage medium, which may be the computer-readable storage medium included in the foregoing apparatus in the foregoing embodiment; or it may be a separate computer readable storage medium not incorporated into the device. The computer readable storage medium stores one or more programs for use by one or more processors in performing the lamination method for battery cells described herein.

It will be understood that any reference above to the orientation or positional relationship of the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc., is based on the orientation or positional relationship shown in the drawings, which is done for convenience in describing the invention and to simplify the description, and is not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and is not to be construed as limiting the invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by those skilled in the art that the scope of the invention herein disclosed is not limited to the particular combination of features described above, but also encompasses other arrangements formed by any combination of the above features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims

1. A method of laminating battery cells, comprising the steps of:

2. The method for laminating a battery cell according to claim 1, wherein the determining whether there is a poor position between the first pole piece and the second pole piece based on the first image and the second image is specifically:

3. The method for laminating a battery cell according to claim 1, wherein the determining whether there is a poor position between the first pole piece and the second pole piece based on the first image and the second image is specifically:

4. The method for laminating a battery cell according to claim 1, wherein the determining whether there is a poor position between the first pole piece and the second pole piece based on the first image and the second image is specifically:

5. The method for laminating battery cells according to claim 2, wherein the first image further includes third position information of the first diaphragm, and based on the first position information and the third position information, it is determined whether a distance between corresponding edges of the first pole piece and the first diaphragm is within a second predetermined range, and if so, no position defect exists between the first pole piece and the first diaphragm; if not, a poor position exists between the first pole piece and the first diaphragm.

6. The method for laminating the battery cells according to claim 2, wherein the second image further includes fourth position information of the second diaphragm, and based on the second position information and the fourth position information, it is determined whether a distance between corresponding edges of the second pole piece and the second diaphragm is within a third predetermined range, and if so, no position failure exists between the second pole piece and the second diaphragm; and if not, determining that the position between the second pole piece and the second diaphragm is poor.

7. The method of stacking battery cells of claim 5 or 6,

determining whether the first pole piece size is qualified based on the first image;

if so, correcting the deviation of the first pole piece; and/or the presence of a gas in the atmosphere,

and if so, correcting the second pole piece.

8. The method of laminating a battery cell of claim 5, wherein each of the first membranes and each of the second membranes are a portion of a continuous strip of membranes;

9. The method of laminating battery cells of claim 8,

the determined position failure occurs in the first diaphragm and/or the first pole piece, specifically:

10. The method of laminating a battery cell of claim 6, wherein each of the first membranes and each of the second membranes are a portion of a continuous strip of membranes;

11. The method of stacking battery cells according to any of claims 8 to 10, wherein the deviation state of the separator tape during the transportation process when each separator is laid is obtained in real time, and when the deviation amount is greater than a predetermined value, the tape releasing mechanism of the separator tape is corrected in real time, so that the currently laid separator meets the position requirement.

12. The method of stacking battery cells of any of claims 2, 5, 6, and 8-10, wherein the first predetermined range is 0.7mm-1.3mm.

13. The method of laminating a battery cell according to claim 5, wherein the second predetermined range is 0 mm-am; wherein A is the width difference between the first diaphragm and the first pole piece.

14. The method of laminating battery cells according to claim 6, wherein the third predetermined range is 0mm-Bmm; and B is the width difference between the second diaphragm and the second pole piece.

15. The method of stacking battery cells of any of claims 1 to 6, 8 to 10, 13 and 14,

transferring the first pole piece to the first diaphragm through a pole piece grabbing mechanism, and maintaining a grabbing state of the first diaphragm in the process of acquiring the first image until the position of the first pole piece is judged to be correct based on the first image; or the position of the first pole piece is judged to be poor based on the first image, and after the position is adjusted to be correct by the pole piece grabbing mechanism, the pole piece grabbing mechanism releases the first pole piece and presses the first pole piece on the first diaphragm; and/or the presence of a gas in the atmosphere,

16. A lamination stack arrangement for battery cells, comprising:

the control unit is used for determining whether a position defect exists between the first pole piece and the second pole piece or not based on the first image and the second image;

17. The stacking apparatus for battery cells according to claim 16, wherein the control unit is configured to determine, based on the first image and the second image, whether there is a poor position between the first pole piece and the second pole piece, specifically:

determining whether the distance between corresponding edges of the first pole piece and the second pole piece is within a first preset range or not based on the first position information and the second position information, if so, determining that no poor position exists between the first pole piece and the second pole piece; if not, a poor position exists between the first pole piece and the second pole piece.

18. The stacking apparatus for battery cells according to claim 16, wherein the control unit is configured to determine, based on the first image and the second image, whether there is a poor position between the first pole piece and the second pole piece, specifically:

19. The battery cell lamination device according to claim 16, wherein the control unit is configured to determine whether there is a poor position between the first pole piece and the second pole piece based on the first image and the second image, and specifically:

respectively performing image recognition on the first image and the second image to recognize a first distance between boundaries corresponding to a first pole piece and a first diaphragm in the first image and a second distance between boundaries corresponding to a second pole piece and a second diaphragm in the second image;

20. The lamination assembly of battery cells of claim 17, wherein the first image further includes third position information of the first membrane;

21. The lamination assembly of battery cells according to claim 17, wherein the second image further comprises fourth position information of the second separator;

the control unit is further configured to determine whether a distance between the second pole piece and a corresponding side of the second diaphragm is within a third predetermined range based on the second position information and the fourth position information, and if so, no position defect exists between the second pole piece and the second diaphragm; if not, a poor position exists between the second pole piece and the second diaphragm 5.

22. The lamination assembly of battery cells according to claim 20 or 21, wherein the control unit is further configured to determine whether the first pole piece size is acceptable based on the first image;

if so, judging whether the position of the first pole piece relative to the first diaphragm is poor;

if so, controlling the pole piece grabbing mechanism to correct the deviation of the first pole piece; and/or the presence of a gas in the atmosphere,

determining whether the second diode size is acceptable based on the second image; if not, controlling the pole piece grabbing mechanism to throw the current second pole piece, and replacing the other second pole piece;

if yes, judging whether the position of the second pole piece relative to the second diaphragm is poor;

if yes, controlling the pole piece grabbing mechanism to correct the deviation of the second pole piece.

23. The lamination assembly of battery cells according to claim 20, wherein each of the first membranes and each of the second membranes is a portion of a continuous strip of membranes;

the image acquisition unit is further configured to acquire a third image of the first 0 th diaphragm on the lamination stage after the first diaphragm is laid on the lamination stage, and the third image is used as a position reference image;

if the first pole piece has position deviation, controlling the pole piece grabbing mechanism to adjust the position of the first pole piece 5 so that the first pole piece meets the position requirement; or replacing the other first pole piece so that the replaced first pole piece meets the position requirement;

and if the first diaphragm has position deviation, controlling a diaphragm belt releasing mechanism of the diaphragm belt to correct the deviation so as to enable each subsequently laid diaphragm to meet the position requirement.

24. The battery cell lamination apparatus of claim 23, wherein the control 0 unit is configured to determine that a position failure occurs in the first separator and/or the first pole piece, and specifically is:

the boundary of the first pole piece in the first image is subtracted from the boundary of the position reference image, whether the difference value is within a first preset difference value range is judged, and if not, poor position occurs in the first pole piece; and/or, performing difference calculation on the boundary of the first diaphragm and the boundary of the position reference image, judging whether the difference value is within a second preset difference value range, and if not, determining that the position failure occurs in the first diaphragm.

25. The lamination assembly of battery cells according to claim 21, wherein each of the first membranes and each of the second membranes is a portion of a continuous strip of membranes;

26. The lamination assembly of battery cells of any one of claims 23-25,

the diaphragm deviation detection sensor is used for acquiring the deviation state of the diaphragm belt in the conveying process when each diaphragm is laid in real time;

27. A terminal device, characterized in that the device comprises: one or more processors; a memory for storing one or more programs; the one or more programs, when executed by the one or more processors, cause the one or more processors to perform the method recited by any of claims 1-15.

28. A computer-readable storage medium, characterized in that a computer program is stored thereon for implementing the method of any one of claims 1 to 15.