Battery cell winding method, device, apparatus, and storage medium

Abstract

The application relates to the automatic control field and discloses a battery cell winding method, a battery cell winding device, a battery cell winding equipment and a storage medium, which are used for improving the quality of battery cells. The battery cell winding method comprises the following steps: obtaining the winding needle number of a target winding needle, obtaining the associated information of a reference battery cell according to the winding needle number of the target winding needle, judging whether the tab offset of the reference battery cell is less than a threshold value, if not, determining the reference circumference of the target winding needle according to the reference position information of a target motor, the reference circumference being the circumference of the target winding needle when the reference battery cell is wound, determining the target circumference according to the tab offset of the reference battery cell and the reference circumference, the target circumference being the circumference of the target winding needle when the next battery cell is wound, adjusting the circumference of the target winding needle to the target circumference through the target motor, and winding the battery cell by using the target winding needle, and if yes, winding the battery cell by using the target winding needle.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of automatic control, in particular to a battery cell winding method, device, equipment and storage medium. BACKGROUND

[0002] Before winding the multi-tab battery cell, the copper foil or aluminum foil used as the tab is cut according to the set size to form a tab, the tab includes a plurality of tabs arranged at intervals, so that the center lines of the plurality of tabs of the same tab are as coincident as possible after winding, and when winding the multi-tab battery cell, the lower diaphragm, the anode tab, the upper diaphragm and the cathode tab are stacked and transmitted to the winding needle of the battery cell winding device, and winding is performed by the winding needle.

[0003] Due to the thickness fluctuation of the tab, the size cutting deviation and the like, the center lines of the tabs of the battery cell obtained after winding are offset, the alignment degree of the tabs of the battery cell cannot be controlled when the battery cell winding device winds the battery cell with the cut tab, and the quality of the battery cell is low. SUMMARY

[0004] The main purpose of the present application is to provide a battery cell winding method, device, equipment and storage medium, which is used to solve the problem that the alignment degree of the tabs of the battery cell cannot be controlled when the battery cell winding device winds the battery cell with the cut tab, and to improve the quality of the battery cell.

[0005] The first aspect of the present application provides a battery cell winding method, comprising: obtaining the winding needle number of a target winding needle, the target winding needle being a winding needle for next battery cell winding; obtaining the associated information of a reference battery cell according to the winding needle number of the target winding needle, the reference battery cell being a battery cell wound last time by the target winding needle, the associated information of the reference battery cell including the tab offset of the reference battery cell and the reference position information of a target motor when winding the reference battery cell, the target motor being a motor corresponding to the target winding needle; determining whether the tab offset of the reference battery cell is less than a threshold value, the tab offset being the distance value between the center line of the innermost target tab and the center line of the outermost target tab, the target tab being a positive tab or a negative tab; if not, determining the reference circumference of the target winding needle according to the reference position information of the target motor, the reference circumference being the circumference of the target winding needle when winding the reference battery cell; determining the target circumference according to the tab offset of the reference battery cell and the reference circumference, the target circumference being the circumference of the target winding needle when winding the next battery cell; adjusting the circumference of the target winding needle to the target circumference by the target motor, and winding the battery cell by the target winding needle; if yes, winding the battery cell by the target winding needle.

[0006] The second aspect of the present application provides an electric core winding device, comprising: a first obtaining module configured to obtain a winding needle number of a target winding needle, the target winding needle being a winding needle for next winding of an electric core; a second obtaining module configured to obtain associated information of a reference electric core according to the winding needle number of the target winding needle, the reference electric core being an electric core last wound by the target winding needle, the associated information of the reference electric core comprising a tab offset of the reference electric core and reference position information of a target motor when winding the reference electric core, the target motor being a motor corresponding to the target winding needle; a judging module configured to judge whether the tab offset of the reference electric core is less than a threshold value, the tab offset being a distance value between a center line of an innermost target tab and a center line of an outermost target tab, the target tab being a positive tab or a negative tab; a first determining module configured to determine reference circumference of the target winding needle according to the reference position information of the target motor if the judgment result is no; a second determining module configured to determine target circumference according to the tab offset of the reference electric core and the reference circumference, the target circumference being a circumference of the target winding needle when winding a next electric core; an adjusting winding module configured to adjust the circumference of the target winding needle to the target circumference by the target motor, and to perform electric core winding by using the target winding needle; and a winding module configured to perform electric core winding by using the target winding needle if the judgment result is yes.

[0007] The third aspect of the present application provides an electric core winding device, comprising: a plurality of winding needles, a plurality of motors, a memory and at least one processor, the memory storing instructions, the plurality of motors corresponding to the plurality of winding needles one by one; the at least one processor calling the instructions in the memory to enable the electric core winding device to perform the above-mentioned electric core winding method.

[0008] The fourth aspect of the present application provides a computer readable storage medium, the computer readable storage medium storing instructions, when running on a computer, enabling the computer to perform the above-mentioned electric core winding method.

[0009] In the technical scheme provided by the present application, the winding needle number of a target winding needle is obtained, the target winding needle is a winding needle for next winding of an electric core, the associated information of a reference electric core is obtained according to the winding needle number of the target winding needle, the reference electric core is an electric core last wound by the target winding needle, the associated information of the reference electric core includes a tab offset of the reference electric core and reference position information of a target motor when the reference electric core is wound, the target motor is a motor corresponding to the target winding needle, the reference circumference of the target winding needle is determined according to the reference position information of the target motor, the reference circumference is the circumference of the target winding needle when the reference electric core is wound, whether the tab offset of the reference electric core is greater than a threshold value is judged, the tab offset is the distance value between the center line of the innermost target tab and the center line of the outermost target tab, the target tab is a positive tab or a negative tab, if not, the target circumference is determined according to the tab offset of the reference electric core and the reference circumference, the target circumference is the circumference of the target winding needle when next electric core is wound, the circumference of the target winding needle is adjusted to the target circumference by the target motor, and the target winding needle is used for winding of the electric core, if yes, the target winding needle is used for winding of the electric core. In the embodiment of the present application, the associated information of the reference electric core last wound by the target winding needle is obtained, when the tab offset of the reference electric core in the associated information is less than the threshold value, it represents that the target winding needle matches the current electric core raw material, and the target winding needle does not need to be adjusted, when the tab offset of the reference electric core in the associated information is greater than or equal to the threshold value, it represents that the target winding needle does not match the cut electric core raw material, and the target winding needle is adjusted at this time, the winding efficiency of the electric core winding device is improved, when the target winding needle is adjusted, the target circumference of the target winding needle after adjustment is obtained according to the associated information, the target motor is controlled to move so that the circumference of the target winding needle is equal to the target circumference, and the target winding needle is used to wind the next electric core, so that the target winding needle can match the cut electric core raw material, the target winding needle is adjusted and controlled according to the associated information of the reference electric core last wound by the target winding needle, the difference caused by different winding needle structure parameters is avoided, the target winding needle can be more accurately adjusted, and the quality of the electric core is improved. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 A schematic view of the electric core winding device in which multiple winding needles are replaced in turn by the winding position;

[0011] Figure 2 A schematic view of the structure change of the motor driving winding needle to realize radius adjustment;

[0012] Figure 3 A schematic view of one embodiment of the electric core winding method in the embodiment of the present application;

[0013] Figure 4 A schematic view of another embodiment of the electric core winding method in the embodiment of the present application;

[0014] Figure 5 An embodiment schematic diagram of the battery cell winding device in the embodiment of the present application;

[0015] Figure 6 An embodiment schematic diagram of the battery cell winding device in the embodiment of the present application. DETAILED DESCRIPTION

[0016] The embodiment of the present application provides a battery cell winding method, device, equipment and storage medium, which are used for improving the quality of the battery cell.

[0017] The terms "first", "second", "third", "fourth" and the like in the description, claims, and drawings of the present application, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the use of these terms herein is to be construed to cover the embodiments of the application, unless otherwise indicated herein or understood by one of ordinary skill in the art. Furthermore, the terms "comprising", "having", "including", and the like, as can be used herein, are to be construed in an inclusive manner, as opposed to an exclusive -only -manner, unless otherwise indicated as used herein. It is noted that, as used in the specification and the appended claims, the singular forms "a", "an" and "the" include plural referents unless otherwise indicated.

[0018] It can be understood that the execution subject of the present application is a battery cell winding device, and can also be a battery cell winding equipment, which is not limited here. The embodiment of the present application takes the battery cell winding equipment as the execution subject for example.

[0019] First, the battery cell winding equipment is described. The battery cell winding equipment includes a plurality of winding needles, each winding needle is numbered, and the plurality of winding needles sequentially wind the battery cell, Figure 1 An embodiment schematic diagram of the plurality of winding needles sequentially replacing the winding position, Figure 1 Three winding needles are drawn, the lower diaphragm, the anode sheet, the upper diaphragm and the cathode sheet are transported to the target position, the three winding needles sequentially move to the target position to wind the battery cell, after the No. 1 winding needle winds the battery cell on the target position, the No. 1 winding needle leaves the target position to unload the wound battery cell, the No. 2 winding needle moves to the target position, after the No. 2 winding needle winds the battery cell on the target position, the No. 2 winding needle leaves the target position to unload the wound battery cell, the No. 3 winding needle moves to the target position, after the No. 3 winding needle winds the battery cell on the target position, the No. 3 winding needle leaves the target position to unload the wound battery cell, and then the No. 1 winding needle moves to the target position to wind the battery cell, and the cycle operation is repeated.

[0020] Each winding needle corresponds to a motor, the winding needle is a structure variable assembly, the cell raw material such as pole piece and diaphragm is wound to obtain a cell with the axis of the cylinder as the center line, the cell formed by winding has one positive electrode lug and one negative electrode lug in each layer, the motor corresponding to the winding needle is arranged at one end of the winding needle, the motor can move in a direction parallel to the axis of the winding needle, the motor adjusts the radius of the winding needle by driving the structure change of the winding needle through linear motion, so that the purpose of adjusting the circumference of the winding needle is achieved, the radius of the winding needle is the distance from a point on the outer surface of the winding needle to the axis of the winding needle, Figure 2 The figure is a schematic diagram for the motor to drive the structure change of the winding needle to achieve radius adjustment, EF is the axis of the winding needle, ABCD is half of the cross-sectional structure of the winding needle, A, B, C and D are four points of movable connection, the motor is mechanically connected with the winding needle, when the motor moves linearly in a direction parallel to EF, the motor drives or pulls the structure of the winding needle, so that the included angle between the side surface of the winding needle and the axis changes, the distance between the surface of the winding needle and the axis also changes, that is, the radius changes, and the corresponding circumference also changes, for example, when the motor moves to the left to drive the structure of the winding needle, ∠BCF increases, the ABCD structure changes from the solid rhombus structure to the dashed rectangle structure, the distance between the point on the surface AB of the winding needle and the axis EF increases, the radius of the winding needle increases, and the circumference increases; when the motor moves to the right to pull the structure of the winding needle, ∠BCF decreases, the distance between the point on the surface AB of the winding needle and the axis EF decreases, the radius of the winding needle decreases, and the circumference decreases.

[0021] When the motor drives the winding needle, the distance between each point on the outer surface of the winding needle and the axis may change, at this time, the winding needle is expanded outward as a whole with the axis as the center, or the distance between part of the outer surface structure of the winding needle and the axis may change, at this time, part of the outer surface structure of the winding needle is expanded outward as a whole with the axis as the center, during winding, the expanded part of the structure also affects the length of each winding of the cell, the cross section of the cell can be circular, elliptical or approximately circular or elliptical, in addition to the structures mentioned above, the cell winding device also includes other structural members, and the specific structure is not limited herein.

[0022] It should be noted that the cell winding device also has other motors for other purposes, such as a motor for driving the rotation of the winding needle, in the embodiments of the present application, the motors not specially mentioned are motors for adjusting the radius / circumference of the winding needle.

[0023] For the convenience of understanding, the specific process of the embodiments of the present application is described below, please refer to Figure 3 One embodiment of the cell winding method in the embodiments of the present application includes the following steps.

[0024] 301, obtaining the winding needle number of a target winding needle, the target winding needle is a winding needle for next cell winding.

[0025] The plurality of winding pins are sequentially used for winding the battery cell, each winding pin in the battery cell winding device is numbered in advance, the winding pin numbers of the winding pins are different, the winding pin number is the identity information of the winding pin, and the battery cell winding device takes the winding pin next used for winding the battery cell as the target winding pin.

[0026] 302、According to the winding pin number of the target winding pin, the associated information of the reference battery cell is obtained, the reference battery cell is the battery cell last wound by the target winding pin, and the associated information of the reference battery cell includes the tab offset of the reference battery cell and the reference position information of the target motor when winding the reference battery cell, the target motor being the motor corresponding to the target winding pin.

[0027] The battery cell winding device takes the last battery cell wound by the target winding pin as the reference battery cell, and determines the motor corresponding to the target winding pin as the target motor, and obtains the tab offset of the reference battery cell and the reference position information of the target motor when winding the reference battery cell.

[0028] There are three ways to obtain the tab offset by the battery cell winding device, the first way is to take a photo of the cross section of the tab side of the reference battery cell after the winding of the reference battery cell is completed, detect the distance value between the outermost positive / negative tab and the center line of the innermost positive / negative tab, and take the distance value as the tab offset, the center line being the width center line of the tab; the second way is to detect the rotation angle of each positive / negative tab when it is transported to the target station by the sensor installed on the battery cell winding device when winding the reference battery cell, to obtain the actual tab angle sequence, to obtain the standard tab angle sequence corresponding to the standard battery cell, and to detect the distance value between the outermost positive / negative tab and the center line of the innermost positive / negative tab according to the comparison result of the actual tab angle sequence and the standard tab angle sequence, and to take the distance value as the tab offset; the third way is to obtain the tab offset of the reference battery cell measured by the artificial.

[0029] 303、Judge whether the tab offset of the reference battery cell is less than a threshold value, the tab offset being the distance value between the center line of the innermost target tab and the center line of the outermost target tab, the target tab being the positive tab or the negative tab.

[0030] Generally, the larger the interval between the tabs on the same tab sheet is, the more obvious the offset is, the innermost positive / negative tab and the outermost positive / negative tab in the reference battery cell are selected, the distance value between the center lines of the innermost positive / negative tab and the outermost positive / negative tab is determined as the tab offset of the reference battery cell, and the significant offset information is obtained.

[0031] Taking the center line of the innermost tab as the reference center line, if the center line of the outermost tab is on the left side of the reference center line, it is determined that the winding pin radius should be reduced, and the circumference of the winding pin should be reduced, and if the center line of the outermost tab is on the right side of the reference center line, it is determined that the winding pin radius should be increased, and the circumference of the winding pin should be increased.

[0032] The electrode core winding device judges whether the tab offset of the reference electrode core is less than a threshold value. When the tab offset is less than the threshold value, it is considered that the electrode core raw material matches the target winding needle, and the tab offset of the reference electrode core is controllable. When the tab offset is greater than or equal to the threshold value, it is considered that the electrode core raw material does not match the target winding needle, and the tab offset of the reference electrode core is uncontrollable.

[0033] 304, if not, the reference circumference of the target winding needle is determined according to the reference position information of the target motor, and the reference circumference is the circumference of the target winding needle when winding the reference electrode core.

[0034] Since the electrode core winding device adjusts the circumference of the winding needle by moving the motor along a direction parallel to the winding needle axis, the position information of the motor is related to the circumference of the winding needle. The position information of the motor includes the reference position of the motor and the moving distance of the motor. The reference position of the motor is the position of the motor when the electrode core winding device is installed. The moving distance of the motor is the difference between the actual position of the motor and the reference position when the corresponding winding needle of the motor winds the electrode core last time.

[0035] If the tab offset of the reference electrode core is greater than or equal to the threshold value, the electrode core winding device determines the winding needle circumference of the target winding needle when winding the reference electrode core according to the reference position information of the target motor, that is, the reference circumference.

[0036] 305, the target circumference is determined according to the tab offset of the reference electrode core and the reference circumference, and the target circumference is the circumference of the target winding needle when winding the next electrode core.

[0037] For the electrode core, the distance between any two tab center lines should be as small as possible, and the ideal case is that the distance between any two tab center lines is 0. The electrode core winding device determines the circumference adjustment value of the target winding needle according to the tab offset of the reference electrode core, and determines the target circumference of the target winding needle according to the reference circumference and the circumference adjustment value.

[0038] 306, the circumference of the target winding needle is adjusted to the target circumference by the target motor, and the target winding needle is used for electrode core winding.

[0039] Since the circumference of the target winding needle is related to the position of the target motor, the position of the target motor is adjusted according to the target circumference, until the circumference of the target winding needle is equal to the target circumference. The electrode core winding device moves the target winding needle to the target working position for electrode core winding, reduces the offset, improves the tab alignment, and improves the quality of the next electrode core winding.

[0040] 307, if yes, the target winding needle is used for electrode core winding.

[0041] If the tab offset of the reference electrode core is less than the threshold value, the electrode core winding device uses the target winding needle for electrode core winding.

[0042] Therefore, each winding needle is adjusted and controlled based on the last wound battery cell of itself to ensure that the winding needle can match the battery cell material. Figure 1 For example, the first winding needle is adjusted and controlled based on the last wound battery cell of the first winding needle, the second winding needle is adjusted and controlled based on the last wound battery cell of the second winding needle, and the third winding needle is adjusted and controlled based on the last wound battery cell of the third winding needle.

[0043] The battery cell winding device circulates the battery cell in the order of the first winding needle, the second winding needle, and the third winding needle. Starting from the second circulation, the working process of the battery cell winding device is as follows: the first winding needle is adjusted and controlled based on the last wound battery cell of the first winding needle, the first winding needle winds the battery cell, the second winding needle is adjusted and controlled based on the last wound battery cell of the second winding needle, the second winding needle winds the battery cell, the third winding needle is adjusted and controlled based on the last wound battery cell of the third winding needle, and the third winding needle winds the battery cell, and the process is repeated.

[0044] In the embodiment, the associated information of the reference battery cell wound last time by the target winding needle is obtained. When the tab offset of the reference battery cell in the associated information is less than a threshold value, it means that the target winding needle matches the current battery cell raw material, and the target winding needle does not need to be adjusted. When the tab offset of the reference battery cell in the associated information is greater than or equal to the threshold value, it means that the target winding needle does not match the cut battery cell raw material, and the target winding needle needs to be adjusted. The winding efficiency of the battery cell winding device is improved. When the target winding needle is adjusted, the target circumference of the target winding needle after adjustment is obtained according to the associated information, the target motor is controlled to move so that the circumference of the target winding needle is equal to the target circumference, and the next battery cell is wound by the target winding needle, so that the target winding needle can match the cut battery cell raw material. The target winding needle is adjusted and controlled according to the associated information of the reference battery cell wound last time by the target winding needle, the difference caused by different winding needle structure parameters is avoided, the target winding needle can be more accurately adjusted, and the quality of the battery cell is improved.

[0045] Please refer to Figure 4 Another embodiment of the battery cell winding method in the embodiment includes the following steps.

[0046] 401、Determine a plurality of circumference formulas corresponding to a plurality of winding needles, wherein the circumference formula indicates the corresponding relationship between the movement distance of the motor and the winding needle circumference of the winding needle.

[0047] The preset circumference of each winding needle in the plurality of winding needles is acquired by the battery cell winding equipment, the preset circumference is the initial circumference of the winding needle when the battery cell winding equipment is installed, the reference position of the motor corresponding to each winding needle is determined according to the preset circumference of each winding needle, the reference position is the position of the motor when the battery cell winding equipment is installed, the point intersecting with the winding needle on the moving route of the motor is taken as the origin, the direction from the origin to the motor is taken as the positive direction of the x-axis, and the coordinate information of the motor on the x-axis is taken as the position information of the motor, the difference between the actual position of the motor and the reference position is the moving distance of the motor, and the positive and negative of the moving distance of the motor represent the moving direction, when the moving distance of the motor is negative, the motor moves towards the winding needle, and when the moving distance of the motor is positive, the motor moves away from the winding needle.

[0048] The battery cell winding equipment collects a plurality of groups of data of the moving distance of each motor based on the reference position and the change of the circumference of the corresponding winding needle, and it is found through research that within a certain distance near the reference position, the moving distance of the motor and the circumference of the winding needle have an approximate linear relationship, based on this, effective data reflecting the linear relationship is screened out, the adjustment coefficient corresponding to each motor is determined according to the effective data in the plurality of groups of data, and the distance-circumference adjustment formula corresponding to each motor is determined according to the reference position of each motor and the adjustment coefficient corresponding to each motor, the distance-circumference adjustment formula of the motor is determined as the circumference formula of the winding needle, and the circumference formula is as follows:

[0049] y i =k i ×x i +b i

[0050] Wherein, i is the serial number of the winding needle, k i is the adjustment coefficient of the i th winding needle, x i is the moving distance of the i th winding needle, b i is the circumference of the i th winding needle when the motor corresponding to the i th winding needle is at the reference position, and y i is the circumference of the i th winding needle when the moving distance of the motor corresponding to the i th winding needle is x i .

[0051] The effective distance range of the motor movement is determined by the battery cell winding equipment according to the effective data, and when the moving distance of the motor is within the effective distance range, the corresponding relationship of the above circumference formula is met.

[0052] The volume of the battery cell is small, and the change range of the winding needle radius does not need to be too large, and in most scenarios, the moving distance of the motor and the change amount of the circumference of the winding needle meet the circumference formula, which simplifies the calculation process and improves the data processing efficiency.

[0053] 402, the winding needle number of the target winding needle is acquired, and the target winding needle is the winding needle for the next battery cell winding.

[0054] 403. Obtain the associated information of the reference battery cell according to the needle number of the target winding needle, the reference battery cell is the battery cell wound last time on the target winding needle, and the associated information of the reference battery cell includes the tab offset of the reference battery cell and the reference position information of the target motor during winding the reference battery cell, and the target motor is the motor corresponding to the target winding needle.

[0055] 404. Determine whether the tab offset of the reference battery cell is less than a threshold value, the tab offset is the distance value between the center line of the innermost target tab and the center line of the outermost target tab, and the target tab is a positive tab or a negative tab.

[0056] Steps 402-404 of the embodiment are the same as steps 301-303, and will not be described here.

[0057] 405. If not, determine the reference circumference of the target winding needle according to the reference position information of the target motor, and the reference circumference is the circumference of the target winding needle during winding the reference battery cell.

[0058] If not, the battery cell winding equipment calls the preset circumference formula corresponding to the target winding needle, the preset circumference formula indicates the corresponding relationship between the movement distance of the target motor and the circumference of the target winding needle, determines the reference movement distance of the target motor according to the reference position information of the target motor, and determines the winding needle circumference of the target winding needle during winding the reference battery cell according to the preset circumference formula corresponding to the target winding needle and the reference movement distance of the target motor, to obtain the reference circumference.

[0059] 406. Determine the tab layer difference corresponding to the tab offset.

[0060] The battery cell winding equipment determines the innermost target tab as the first layer target tab, identifies the layer number of the reference battery cell from inside to outside, and determines the tab layer difference corresponding to the tab offset as the layer number of the outermost target tab minus 1.

[0061] 407. Determine the winding needle circumference adjustment value of the target winding needle according to the tab offset and the tab layer difference.

[0062] When the angle of winding needle winding is infinitely small, the calculation formula of the winding length of the winding needle is:

[0063] s = l θ i → m0(θ × r)

[0064] Wherein, s is the winding length, the winding length refers to the length of the raw material wound on the surface of the winding needle, the raw material is a plurality of sheet layers of the lower separator, the anode sheet, the upper separator and the cathode sheet, θ is the angle of the winding needle turning, the angle of the winding needle turning is obtained by the motor driving the winding needle to rotate, the motor driving the winding needle to rotate and the motor controlling the change of the radius of the winding needle are different motors, and if the winding needle turns one circle, θ is 2π, and r is the winding radius corresponding to the angle θ of the winding needle turning.

[0065] Therefore, when the winding radius changes Δr, the change amount of the winding length is as follows:

[0066]

[0067] When the winding radius changes Δr, the change amount of the winding length is as follows:

[0068]

[0069] The change of the winding length of each layer is equivalent to the offset amount of the tab of each layer, and therefore the relationship between the relative offset amount of the tabs of each layer and the circumference of the winding needle is as follows:

[0070] Δd mn = (n-m) x ΔC

[0071] wherein Δd mn is the tab offset amount of the tab of the mth layer and the tab of the nth layer, and ΔC is the change amount of the circumference of the winding needle.

[0072] The winding needle length adjustment value of the reference battery cell is determined according to the tab offset amount of the reference battery cell and the relationship between the offset amount and the circumference of the winding needle, and the change amount of the circumference of the winding needle is the winding needle length adjustment value of the reference battery cell.

[0073] 408. Determine the target circumference of the target winding needle based on the winding needle length adjustment value and the reference circumference.

[0074] The winding needle length adjustment value and the reference circumference are used to determine the target circumference of the winding needle, and the alignment of the tabs can be improved after the winding needle is adjusted to the target circumference.

[0075] 409. Adjust the circumference of the target winding needle to the target circumference by the target motor, and use the target winding needle to wind the battery cell.

[0076] The preset circumference formula of the target winding needle is called, the target movement distance of the target motor is determined according to the target circumference and the preset circumference formula, the target position of the target motor is determined according to the target movement distance of the target motor, the target motor is controlled to move to the target position, so that the circumference of the target winding needle is equal to the target circumference, and the adjusted target winding needle is used to wind the battery cell.

[0077] It is mentioned above that when the motor moves within the effective distance range, the motor moving distance is approximately linearly related to the winding needle circumference, if the movement according to the target motor moving distance exceeds the effective distance range, the target motor moves to the critical point of the effective distance range, the battery winding equipment calculates the temporary circumference of the target winding needle at the critical point, calculates the circumference difference value between the temporary circumference and the target circumference, if the difference value is less than the difference value threshold, the target motor is stopped at the critical point and the target winding needle is used for battery winding, if the difference value is greater than or equal to the difference value threshold, the additional moving distance of the target motor is determined based on half of the circumference difference value and the circumference formula, and the movement is continued for the additional moving distance in the same direction and then stopped, and the target winding needle is used for battery winding. In this way, the tab alignment degree can be improved to a certain extent, and the adjustment out of control caused by the invalidation of the preset circumference formula due to the exceeding of the effective distance range can be avoided.

[0078] 410, if yes, the target winding needle is used for battery winding.

[0079] The step 410 of the embodiment is the same as the step 307, and will not be described here again.

[0080] 411, the target battery winding information sequence corresponding to the winding needle number is updated, and the associated information of the battery wound by the target winding needle is stored in the target battery winding information sequence.

[0081] The battery winding equipment establishes a battery winding information sequence based on each winding needle number, the associated information of the battery wound by the winding needle corresponding to the winding needle number is stored in the battery winding information sequence, and the associated information of the battery includes the tab offset of the battery and the position information of the corresponding motor when the battery is wound.

[0082] In the embodiment of the application, the associated information of the reference battery wound by the target winding needle last time is obtained, when the tab offset of the reference battery in the associated information is less than the threshold value, it represents that the target winding needle matches the current battery raw material, and it is not necessary to adjust the target winding needle, when the tab offset of the reference battery in the associated information is greater than or equal to the threshold value, it represents that the target winding needle does not match the cut battery raw material, and the target winding needle is adjusted at this time, the target circumference of the target winding needle after adjustment is obtained according to the associated information, the target motor is controlled to move so that the circumference of the target winding needle is equal to the target circumference, and the next battery is wound by the target winding needle, so that the target winding needle can match the cut battery raw material, the target winding needle is adjusted and controlled according to the associated information of the reference battery wound by the target winding needle last time, the difference caused by different winding needle structure parameters is avoided, the target winding needle can be adjusted more accurately, and the quality of the battery is improved.

[0083] The battery winding method in the embodiment of the application is described above, and the battery winding device in the embodiment of the application is described below, please refer toFigure 5 In an embodiment of the present application, an embodiment of the cell winding device comprises:

[0084] The first obtaining module 501 is configured to obtain a winding needle number of a target winding needle, the target winding needle being a winding needle for winding a cell next time;

[0085] The second obtaining module 502 is configured to obtain associated information of a reference cell according to the winding needle number of the target winding needle, the reference cell being a cell wound last time by the target winding needle, the associated information of the reference cell comprising a tab offset of the reference cell and reference position information of a target motor when winding the reference cell, the target motor being a motor corresponding to the target winding needle;

[0086] The judging module 503 is configured to judge whether the tab offset of the reference cell is less than a threshold value, the tab offset being a distance value between a center line of an innermost target tab and a center line of an outermost target tab, the target tab being a positive tab or a negative tab;

[0087] The first determining module 504 is configured to, if no, determine a reference circumference of the target winding needle according to the reference position information of the target motor, the reference circumference being a circumference of the target winding needle when winding the reference cell;

[0088] The second determining module 505 is configured to determine a target circumference according to the tab offset of the reference cell and the reference circumference, the target circumference being a circumference of the target winding needle when winding a next cell;

[0089] The adjusting winding module 506 is configured to adjust the circumference of the target winding needle to the target circumference by the target motor, and to wind a cell by using the target winding needle;

[0090] The winding module 507 is configured to, if yes, wind a cell by using the target winding needle.

[0091] Optionally, the first determining module 504 is specifically configured to:

[0092] If no, a preset circumference formula corresponding to the target winding needle is called, the preset circumference formula indicating a corresponding relationship between a moving distance of the target motor and a circumference of the target winding needle; a reference moving distance of the target motor is determined according to the reference position information of the target motor; a winding needle circumference of the target winding needle when winding the reference cell is determined according to the preset circumference formula and the reference moving distance of the target motor, to obtain a reference circumference.

[0093] Optionally, the second determining module 505 is specifically configured to:

[0094] determine a difference in the number of layers of the tab corresponding to the tab offset; determine a winding length adjustment value of the target winding needle according to the tab offset and the difference in the number of layers of the tab; and determine a target length of the target winding needle based on the winding length adjustment value and the reference length.

[0095] Optionally, the adjusting winding module 506 is specifically configured to:

[0096] Optionally, the adjusting winding module 506 is specifically configured to:

[0097] Optionally, the battery cell winding device further comprises an updating module 508 configured to update a target battery cell winding information sequence corresponding to the winding needle number, the target battery cell winding information sequence storing the associated information corresponding to the battery cell wound by the target winding needle.

[0098] Optionally, the battery cell winding device further comprises a third determining module 509 configured to determine a plurality of length formulas corresponding to the plurality of winding needles, the length formula indicating a corresponding relationship between the movement distance of the motor and the winding length of the winding needle.

[0099] Optionally, the third determining module 509 is specifically configured to:

[0100] Optionally, the third determining module 509 is specifically configured to:

[0101] In the embodiment of the present application, the associated information of the reference battery cell last wound by the target winding needle is acquired, when the tab offset of the reference battery cell in the associated information is less than the threshold value, it represents that the target winding needle matches the current battery cell raw material, and the target winding needle does not need to be adjusted, when the tab offset of the reference battery cell in the associated information is greater than or equal to the threshold value, it represents that the target winding needle does not match the cut battery cell raw material, and the target winding needle is adjusted at this time, the winding efficiency of the battery cell winding device is improved, when the target winding needle is adjusted, the target circumference of the target winding needle after adjustment is obtained according to the associated information, the target motor is controlled to move so that the circumference of the target winding needle is equal to the target circumference, and the next battery cell is wound by the target winding needle, so that the target winding needle can match the cut battery cell raw material, the target winding needle is adjusted and controlled according to the associated information of the reference battery cell last wound by the target winding needle, the difference caused by different winding needle structure parameters is avoided, the target winding needle can be more accurately adjusted, and the quality of the battery cell is improved.

[0102] The above Figure 5 The battery cell winding device in the embodiment of the present application is described in detail from the perspective of a modular functional entity, and the battery cell winding device in the embodiment of the present application is described in detail from the perspective of hardware processing.

[0103] Referring to Figure 6 As shown in the figure, the battery cell winding device includes a processor 600 and a memory 601, the memory 601 stores machine executable instructions capable of being executed by the processor 600, and the processor 600 executes the machine executable instructions to realize the above-mentioned battery cell winding method.

[0104] Further, Figure 6 As shown in the figure, the battery cell winding device further includes a bus 602, a communication interface 603, a plurality of winding needles 604 and a plurality of motors 605, and the processor 600, the communication interface 603 and the memory 601 are connected through the bus 602.

[0105] The memory 601 can include a high-speed random access memory (RAM), and can also include a non-volatile memory, for example, at least one disk memory. The communication connection between the system network element and at least one other network element is realized through at least one communication interface 603 (which can be wired or wireless), and the Internet, a wide area network, a local area network, a metropolitan area network, etc. can be used. The bus 602 can be an ISA bus, a PCI bus or an EISA bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For the convenience of representation, Figure 6 Only one bidirectional arrow is used in the figure, but it does not mean that there is only one bus or one type of bus.

[0106] The processor 600 can be an integrated circuit chip having a processing capability of signals. In the implementation process, each step of the above method can be completed by the integrated logic circuit of hardware in the processor 600 or the instruction in the form of software. The processor 600 described above can be a general processor, including a central processing unit (CPU), a network processor (NP), etc.; can also be a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component. Each method, step and logic block diagram disclosed in the embodiments of the present disclosure can be implemented or executed. The general processor can be a microprocessor or the processor can also be any conventional processor. The steps of the method disclosed in combination with the embodiments of the present disclosure can be directly embodied as a hardware code processor for execution, or a combination of hardware and software modules in the code processor for execution. The software module can be located in a random access memory, a flash memory, a read only memory, a programmable read only memory or an electrically erasable programmable memory, a register, etc. The storage medium in the art. The storage medium is located in the memory 601, and the processor 600 reads the information in the memory 601, and combines the hardware to complete the method steps of the above embodiments.

[0107] The present application also provides a computer readable storage medium, which can be a non-volatile computer readable storage medium, and can also be a volatile computer readable storage medium, and the computer readable storage medium has instructions stored therein, and when the instructions are run on a computer, the computer executes the steps of the cell winding method.

[0108] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the above described system, device and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

[0109] The integrated unit, if implemented in the form of a software function unit and sold or used as an independent product, can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application or the entire or part of the technical solutions that essentially contribute to the prior art can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in the various embodiments of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various media that can store program codes.

[0110] The above-described embodiments are merely used to illustrate the technical solutions of the present application, rather than limit the same; even though the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that modifications can still be made to the technical solutions recorded in the foregoing embodiments, or equivalent replacements can be made to some of the technical features; and these modifications or replacements do not cause the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A cell winding method applied to a cell winding apparatus, the cell winding apparatus comprising a plurality of winding pins and a plurality of motors corresponding one-to-one to the plurality of winding pins, characterized by, The cell winding method comprises: obtaining a winding needle number of a target winding needle, the target winding needle being a winding needle for next cell winding; obtaining associated information of a reference cell according to the winding needle number of the target winding needle, the reference cell being a cell last wound by the target winding needle, the associated information of the reference cell comprising a tab offset of the reference cell and reference position information of a target motor when the reference cell is wound, the target motor being a motor corresponding to the target winding needle; determining whether the tab offset of the reference cell is less than a threshold value, the tab offset being a distance value between a center line of an innermost target tab and a center line of an outermost target tab, the target tab being a positive tab or a negative tab; if not, determining a reference circumference of the target winding needle according to the reference position information of the target motor, the reference circumference being a circumference of the target winding needle when the reference cell is wound; determining a target circumference according to the tab offset of the reference cell and the reference circumference, the target circumference being a circumference of the target winding needle when next cell is wound; adjusting the circumference of the target winding needle to the target circumference by the target motor, and winding the cell by the target winding needle; if yes, winding the cell by the target winding needle.

2. The cell winding method according to claim 1, characterized by, The if not, determining the reference circumference of the target winding needle according to the reference position information of the target motor, comprises: if not, calling a preset circumference formula corresponding to the target winding needle, the preset circumference formula indicating a corresponding relationship between a moving distance of the target motor and the circumference of the target winding needle; determining a reference moving distance of the target motor according to the reference position information of the target motor; determining the winding needle circumference of the target winding needle when the reference cell is wound according to the preset circumference formula and the reference moving distance of the target motor, to obtain the reference circumference.

3. The cell winding method according to claim 1, characterized by, The determining the target circumference according to the tab offset of the reference cell and the reference circumference, comprises: determining a tab layer difference corresponding to the tab offset; determining a winding needle circumference adjustment value of the target winding needle according to the tab offset and the tab layer difference; determining the target circumference of the target winding needle based on the winding needle circumference adjustment value and the reference circumference.

4. The cell winding method according to claim 1, characterized by, The adjusting the circumference of the target winding needle to the target circumference by the target motor, and winding the cell by the target winding needle, comprises: calling a preset circumference formula of the target winding needle; determining a target moving distance of the target motor according to the target circumference and the preset circumference formula; determining a target position of the target motor according to the target moving distance of the target motor; controlling the target motor to move to the target position, so that the circumference of the target winding needle is equal to the target circumference; winding the cell by the adjusted target winding needle.

5. The cell winding method according to claim 1, characterized by, After the winding the cell by the target winding needle, further comprising: updating a target cell winding information sequence corresponding to the winding needle number, the target cell winding information sequence storing associated information corresponding to the cell wound by the target winding needle.

6. The cell winding method according to any one of claims 1 to 5, characterized by, Before the obtaining the winding needle number of the target winding needle, further comprising: Determine a plurality of perimeter formulas corresponding to the plurality of winding pins, the perimeter formulas indicating a corresponding relationship between a movement distance of the motor and a winding pin perimeter of the winding pin.

7. The cell winding method according to claim 6, wherein The determining the plurality of perimeter formulas corresponding to the plurality of winding pins comprises: Obtaining a preset perimeter of each winding pin in the plurality of winding pins; Determining a reference position of each motor corresponding to each winding pin according to the preset perimeter of each winding pin; Collecting a plurality of groups of data of a movement distance and a corresponding winding pin perimeter change when each motor moves based on the reference position; Determining an adjustment coefficient corresponding to each motor according to the plurality of groups of data corresponding to each motor; Determining a distance-perimeter adjustment formula corresponding to each motor according to the reference position of each motor and the adjustment coefficient corresponding to each motor; Determining the distance-perimeter adjustment formula as the perimeter formula of the winding pin.

8. An electrode core winding device characterized by comprising: The winding device comprises: A first obtaining module configured to obtain a winding pin number of a target winding pin, the target winding pin being a winding pin for winding a next battery cell; A second obtaining module configured to obtain associated information of a reference battery cell according to the winding pin number of the target winding pin, the reference battery cell being a battery cell last wound by the target winding pin, the associated information of the reference battery cell comprising a tab offset of the reference battery cell and reference position information of a target motor when winding the reference battery cell, the target motor being a motor corresponding to the target winding pin; A judging module configured to judge whether the tab offset of the reference battery cell is less than a threshold value, the tab offset being a distance value between a center line of an innermost target tab and a center line of an outermost target tab, the target tab being a positive tab or a negative tab; A first determining module configured to, if not, determine a reference perimeter of the target winding pin according to the reference position information of the target motor, the reference perimeter being a perimeter of the target winding pin when winding the reference battery cell; A second determining module configured to determine a target perimeter according to the tab offset of the reference battery cell and the reference perimeter, the target perimeter being a perimeter of the target winding pin when winding a next battery cell; An adjustment winding module configured to adjust the perimeter of the target winding pin to the target perimeter by the target motor, and to wind a battery cell by using the target winding pin; A winding module configured to, if yes, wind a battery cell by using the target winding pin.

9. An electrode core winding apparatus characterized by comprising: The battery cell winding device comprises a plurality of winding pins, a plurality of motors, a memory and at least one processor, the memory storing instructions, and the plurality of motors correspond to the plurality of winding pins one by one. The at least one processor invokes the instructions in the memory, so that the battery cell winding device performs the battery cell winding method in any one of claims 1-7.

10. A computer-readable storage medium having stored thereon instructions, the computer-readable storage medium comprising: The instructions are executed by the processor to implement the battery cell winding method in any one of claims 1-7.

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