CN108428946B - Diaphragm compensation method of winding machine - Google Patents

Diaphragm compensation method of winding machine Download PDF

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Publication number
CN108428946B
CN108428946B CN201810167802.XA CN201810167802A CN108428946B CN 108428946 B CN108428946 B CN 108428946B CN 201810167802 A CN201810167802 A CN 201810167802A CN 108428946 B CN108428946 B CN 108428946B
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station
diaphragm
roller
length
compensation
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CN108428946A (en
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严海宏
贺四清
姜小虎
曾令辉
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Shenzhen Yinghe Technology Co Ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

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Abstract

The invention discloses a diaphragm compensation method of a winding machine, which comprises the following steps: the device comprises an unwinding mechanism, a compensation mechanism and a station changing mechanism, wherein a diaphragm released by the unwinding mechanism is guided into the station changing mechanism through the compensation mechanism; when the station is changed, the compensation mechanism is synchronously adjusted, so that the compensation length of the diaphragm is dynamically adjusted; and the sum of the compensation length and the unreeling length of the unreeling mechanism releasing the diaphragm is consistent with the station changing length of the diaphragm required by the station changing mechanism in the station changing process. The method can accurately and effectively compensate the diaphragm length required by the station changing in the process of changing the station at a high speed, thereby eliminating the sudden change of the diaphragm speed caused by the high-speed station changing, effectively avoiding the phenomena of diaphragm jumping and dragging, improving the production stability of equipment and improving the production quality of the equipment.

Description

Diaphragm compensation method of winding machine
Technical Field
The invention relates to the technical field of novel batteries, in particular to a diaphragm compensation method of a winding machine.
Background
The quick development of lithium battery production has higher and higher dependence on the equipment, and the lithium battery winding machine is gradually favored by lithium ion battery cell manufacturers due to the advantages of wide application range, convenience in operation, low cost and the like. At present, due to the improvement of the efficiency of the equipment, the station changing time of the station changing mechanism needs to be reduced again, which requires the station changing mechanism to accelerate or decelerate to a specified speed in a shorter time, so that the speed of the diaphragm can be suddenly changed in the station changing process. In the prior art, a tension mechanism is usually used for keeping a certain tension of a diaphragm, but the method is difficult to perform unreeling and accurate synchronous control between the tension and a reeling station, particularly, as the production efficiency is improved, the time for changing the station is required to be shortened again, a single tension mechanism cannot meet the control of the diaphragm in the prior art, the diaphragm is easy to be pulled to cause belt breakage due to overlarge tension of the diaphragm, or the diaphragm is separated from a roller due to too small tension, and the deviation is generated in the axial direction of the roller, so that the diaphragm deviates; thereby affecting production stability and product quality.
Disclosure of Invention
In order to solve the problems, the invention provides a diaphragm compensation method of a winding machine, which can accurately and effectively compensate the length of a diaphragm required by a station change in the process of changing the station at a high speed, so that the sudden change of the speed of the diaphragm caused by the station change at the high speed is eliminated, the phenomena of diaphragm jumping and pulling are effectively avoided, the production stability of equipment is improved, and the production quality of the equipment is improved.
The invention provides a diaphragm compensation method of a winding machine, which comprises the following steps: the device comprises an unwinding mechanism, a compensation mechanism and a station changing mechanism, wherein a diaphragm released by the unwinding mechanism is guided into the station changing mechanism through the compensation mechanism; when the station is changed, the compensation mechanism is synchronously adjusted, so that the compensation length of the diaphragm is dynamically adjusted; and the sum of the compensation length and the unreeling length of the unreeling mechanism releasing the diaphragm is consistent with the station changing length of the diaphragm required by the station changing mechanism in the station changing process.
Preferably, the compensation mechanism comprises: the device comprises a transmission mechanism and a floating roller arranged on the transmission mechanism; the diaphragm released by the unreeling mechanism is guided into the station changing mechanism through the second fixed roller, the floating roller and the first fixed roller in sequence; when the station is changed, the transmission mechanism drives the floating roller to move, the compensation length of the diaphragm from the floating roller to the first fixed roller is dynamically adjusted, the sum of the compensation length and the unreeling length of the diaphragm released by the unreeling mechanism is equal to the station changing length of the diaphragm required by the station changing mechanism when the station is changed, and the following formula is met: Δ L ═ Δ C + S; and the delta L is the length of the station changing position of the diaphragm, the delta C is the compensation length of the diaphragm from the floating roller to the first fixed roller, and the S is the unreeling length of the unreeling mechanism for releasing the diaphragm.
Further preferably, the floating roller moves in a manner consistent with that of the station changing mechanism.
Preferably, the station changing mode of the station changing mechanism comprises a rotary mode, and the transmission mechanism drives the floating roller to do rotary motion.
The transmission mechanism drives the rotation angle of the floating roller and the rotation angular speed of the battery cell during station changing to meet the following formula:
ΔL＝ΔC+S；ΔL＝L′1-L1；ΔC＝L6-L′6；S＝vt；
Figure BDA0001584964720000022
Figure BDA0001584964720000024
wherein L is1Before the station is changed, the length from the first fixed roller to the diaphragm of the battery cell is increased; l'1After the station is changed, the length of the diaphragm from the first fixed roller to the battery cell is increased; l is6Before the compensation mechanism is adjusted, the length of the diaphragm between the first fixed roller and the floating roller is adjusted; l'6The length of the diaphragm between the first fixed roller and the floating roller is adjusted by the compensation mechanism; v is the unwinding speed of the unwinding mechanism, and t is the station changing time; r is1Is the radius of the cell core; r is2Is a first fixed roll radius; r1Rotating the radius for changing the station; l is3The center distance between the winding head and the first fixed roller; theta1Before changing station, L3And R1Angle therebetween α1The angle of rotation of the cell; r2The rotating radius of the floating roller; l is5The center distance between the first fixed roller and the rotation center of the floating roller; theta2Before adjustment for the compensating mechanism, L5And R2The included angle between them; r is3The radius of the first fixed roller; r is4Radius of the floating roll α2Is the angle of rotation of the dancer roll.
Or, preferably, the station changing mode of the station changing mechanism comprises a linear moving mode, and the transmission mechanism drives the floating roller to do linear moving motion.
The transmission mechanism drives the floating roller to move by a distance which satisfies the following formula with the distance of the battery cell moving when the station is changed:
ΔL＝ΔC+S；ΔL＝A′-A；ΔC＝A1-A′1；S＝vt；
Figure BDA0001584964720000032
Figure BDA0001584964720000033
Figure BDA0001584964720000034
Figure BDA0001584964720000035
Figure BDA0001584964720000036
wherein A is the length of a diaphragm from the first fixed roller to the battery cell before the station is changed; a'1After the station is changed, the length of the diaphragm from the first fixed roller to the battery cell is increased; a. the1Before the compensation mechanism is adjusted, the length of the diaphragm between the first fixed roller and the floating roller is adjusted; a'1The length of the diaphragm between the first fixed roller and the floating roller is adjusted by the compensation mechanism; v is the unwinding speed of the unwinding mechanism, and t is the station changing time; r is1Is the radius of the cell core; r is2The radius of the first fixed roller, the length of the diaphragm between the first fixed roller and the battery cell before station changing, the length of the diaphragm between the first fixed roller and the battery cell after station changing, β1An included angle between the movement track of the battery cell and a vertical line is formed; delta 1 is an included angle between the fixed roller, the cell connecting line and the vertical line; c is the moving distance of the battery cell; r is3The radius of the first fixed roller; r is4Is the radius of the floating roll; b is1Before the compensation mechanism is adjusted, the center distance between the first fixed roller and the floating roller; b is1β2Is the motion track and the vertical motion of the floating rollThe included angle between the straight lines; delta2The included angle between the central connecting line and the vertical line of the fixed roller and the floating roller; c1Is the moving distance of the floating roller.
Further preferably, the power unit and the transmission unit are connected, and the floating roller is arranged on the transmission unit. The power unit includes: a motor or a cylinder, and the transmission unit comprises a rocker arm. The motor or the cylinder is connected with the middle part or one end of the rocker arm, and the floating roller is arranged at the other end of the rocker arm.
The invention has the beneficial effects that: according to the invention, the compensation mechanism is arranged between the unwinding mechanism and the station changing mechanism, and the compensation mechanism is actively and synchronously adjusted when the station is changed, so that the compensation length of the diaphragm is dynamically adjusted, and the sum of the compensation length and the unwinding length of the diaphragm released by the unwinding mechanism is consistent with the station changing length of the diaphragm required by the station changing mechanism when the station is changed; thereby at the in-process that trades the station at a high speed, accurate and compensate the diaphragm length of trading the station demand effectively to eliminate the sudden change of the diaphragm speed because of the high-speed sudden change that trades the station and bring, the effectual diaphragm of avoiding beats and drags the phenomenon, has improved the production stability of equipment, has promoted the quality of equipment production.
Drawings
Fig. 1 is a mechanical structure diagram of a winding machine according to an embodiment of the present invention.
Fig. 2 is a schematic diagram illustrating the change of the diaphragm length during the rotation position change according to the embodiment of the present invention.
Fig. 3 is a schematic diagram of a variation compensation scheme for a rotary diaphragm according to an embodiment of the present invention.
Fig. 4 is a diagram illustrating a relationship between a rotation angle of a rotary diaphragm compensation floating roller and a rotation angle of a cell during rotary station change in an embodiment of the present invention.
Fig. 5 is a schematic diagram illustrating the change of the diaphragm length when the linear movable type station is changed according to the embodiment of the present invention.
Fig. 6 is a schematic diagram of a linear movable diaphragm compensation variation according to an embodiment of the present invention.
Fig. 7 is a diagram illustrating a relationship between a moving distance of the linearly movable diaphragm compensation floating roller and a moving distance of the battery cell during the linearly movable station changing operation according to the embodiment of the present invention.
Detailed Description
The present invention is described in further detail below with reference to specific embodiments and with reference to the attached drawings, it should be emphasized that the following description is only exemplary and is not intended to limit the scope and application of the present invention.
In the description of the present invention, it is to be understood that the terms "central", "longitudinal", "lateral", "upper", "lower", "vertical", "horizontal", "inner", "outer", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present 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 implicitly indicating 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 specifically defined otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
As shown in fig. 1, a winding machine includes a station changing mechanism 1, an unwinding mechanism 2, and a compensating mechanism. The compensation structure includes: a power unit, a transmission unit and a floating roller 4; the power unit can be a motor or a cylinder, the transmission unit comprises a rocker arm, the floating roller 4 is arranged at one end of the rocker arm, and the rocker arm is connected with the power unit, can be connected to the middle of the rocker arm and can also be connected to the other end of the rocker arm.
The unwinding mechanism 2 releases the diaphragm 3, the diaphragm 3 passes through the fixed roller 5 and the floating roller 4 to form a compensation area, and finally the compensation area is connected with the station changing mechanism 1. The station-changing mechanism has to contain two or more stations, and the diagram shows three stations: station I, station II and station III; the number of the fixed rollers 5 is two or more, three are shown; the floating roller 4 is at least one, and two or more than two.
The station changing mode of the station changing mechanism comprises a rotary mode or a linear moving mode, and a rotary table is shown in a rotary mode in figure 1. Station II is traded from station I to station 1 to the mechanism that trades, drives diaphragm 3, and unwinding mechanism 2 releases diaphragm 3 simultaneously, and because the high-speed station that trades is fast, diaphragm 3 receives the high-speed influence of trading the station, from accelerating to the in-process that slows down: during the acceleration section, the unreeling speed and the tension response speed are not matched, so that the diaphragm 3 is pulled, and the diaphragm is easy to break; even if the diaphragm 3 is not broken by pulling, the diaphragm 3 is in a high-speed moving state after being accelerated subsequently, the fixed roller 5 is driven by the diaphragm 3, the rotating speed of the fixed roller 5 is accelerated to a high-speed state, and at the moment, the speed is reduced; during the deceleration section, because unwinding mechanism 2 and tension response speed mismatch, lead to diaphragm 3 and decide roller 5 because inertia effect can continue the preshoot toward the moving direction, cause diaphragm 3 can release too much, tension inefficacy and lax, lead to diaphragm 3 to break away from and decide roller 5 to diaphragm 3 beats appears, causes diaphragm 3 at the skew of deciding roller 5's axial direction.
When the station is changed, the power unit in the compensation mechanism drives the rocker arm to perform rotary or linear movement, so that the floating roller is driven to perform rotary or linear movement, the distance between the floating roller 4 and the fixed roller 5 is changed, and the speed of the station changing mechanism 1 is matched; in the process of high-speed station changing, the floating roller 4 is controlled to be close to or far from the fixed roller 5, the diaphragm 3 is released or contracted, the length of the released diaphragm 3 is consistent with that of the diaphragm 3 required by the station changing, and the length compensation of the diaphragm 3 is realized.
When the mode of changing the station is the carousel rotation type, and adopt servo motor control floating roll 4 to rotate around a certain fulcrum, according to the rotation type change of diaphragm length schematic diagram when changing the station that fig. 2 shows, can know:
before station changing:
Figure BDA0001584964720000051
Figure BDA0001584964720000052
Figure BDA0001584964720000061
after the station is changed:
Figure BDA0001584964720000062
Figure BDA0001584964720000063
from this, the membrane length after the change of station can be derived:
Figure BDA0001584964720000064
according to the formula (3) and the formula (6), the change length of the diaphragm after the station change is obtained as follows:
ΔL＝L′1-L1formula (7)
Wherein L is1Before the station is changed, the length from a fixed roller connected with the station changing mechanism to a diaphragm of the battery cell is increased; r is1Is the radius of the cell core; r is2The radius of a fixed roller connected with a station changing mechanism; l is2Before the station is changed, the middle distance between a fixed roller connected with the station changing mechanism and the battery cell is set; r1Rotating the radius for changing the station; l is3The center distance between a fixed roller connected with the station changing mechanism and a winding head is used; theta1Before changing station, L3And R1Between themAn angle; l'1α length of diaphragm from fixed roller connected with the station-changing mechanism to battery cell after station-changing1The angle of rotation of the cell; and the delta L is the station changing length of the diaphragm required in station changing.
From the schematic diagram of the rotary diaphragm compensation variation shown in fig. 3, it can be seen that:
before compensation:
Figure BDA0001584964720000065
Figure BDA0001584964720000067
after compensation:
Figure BDA0001584964720000068
Figure BDA0001584964720000069
Figure BDA00015849647200000610
from equations (10) and (13), the compensated diaphragm variation length is derived as:
ΔC＝L6-L′6formula (14)
Wherein L is6Before the compensation mechanism is adjusted, the length of a diaphragm between a fixed roller and a floating roller which are connected with the floating roller is adjusted; l is4Before compensation, the center distance between the fixed roller and the floating roller connected with the floating roller; r is3The radius of a fixed roller connected with a floating roller; r is4Is the radius of the floating roll; r2The rotating radius of the floating roller; l is5The center distance between the rotating centers of the fixed roller and the floating roller which are connected with the floating roller; theta2Before adjustment for the compensating mechanism, L5And R2The included angle between them; l'6The length of the diaphragm between the fixed roller and the floating roller which are connected with the floating roller after being adjusted by the compensation mechanism; l'4α center distance between fixed roller and floating roller connected with floating roller after compensation2Is the angle of rotation of the dancer roll.
In summary, since the unwinding speed is constant, the total length of the released membrane during the whole station changing process is as follows:
formula (15) where S is vt
V is the unwinding speed of the unwinding mechanism, and t is the station changing time.
Thus, the change in diaphragm length required to change stations is made equal to the length of the diaphragm released upon compensation, given the overall equation:
Δ L ═ Δ C + S formula (16)
Substituting the above formula into formula 16 for conversion to obtain a relationship diagram of the rotation angle of the rotary diaphragm compensation floating roller and the rotation angle of the cell during rotary station changing, as shown in fig. 4, the abscissa of the diagram is the rotation angle α of the cell at the station changing position1The ordinate is the rotating angle α of the floating roller driven by the diaphragm compensation motor2，α1And α2In a cosine-like function relationship. Accelerating the station change from 0, keeping the unwinding speed constant, wherein the diaphragm required by the station change is not enough to consume the unwound diaphragm, and the diaphragm is cached by the compensation mechanism; when the station changing speed reaches a certain value, the diaphragm required by station changing is matched with the unreeling diaphragm, and the diaphragm is cached to the maximum value by the compensation mechanism; when the station changing speed continues to increase to the maximum value, the diaphragm required by station changing is more than the unreeling diaphragm, at the moment, the compensation mechanism releases the diaphragm and slowly restores to the original position, which is shown as a curve section below a point 0 of a vertical coordinate in the figure; when the station is changed to start to decelerate, the needed diaphragm is more than the unreeling diaphragm, so the compensating mechanism still releases the diaphragm at the time; when the work station is decelerated to a certain value, the diaphragm required by the work station is matched with the unreeling diaphragm, and the compensating mechanism releases the diaphragm to the maximum value; the work station is continuously decelerated to stop, the diaphragm required by the work station is less than the unreeling diaphragm, at the moment, the diaphragm is cached by the compensation mechanism, namely, the diaphragm slowly returns to the original point, which is shown as a vertical coordinate in the figureThe upper curve segment at point 0. Before the station is prepared to be changed, the diaphragm compensation motor is started to be synchronous with the cam of the station changing motor, and when the station changing motor starts to perform station changing action, the diaphragm compensation motor controls the floating roller to actively move to a corresponding position according to the track of the cam. And when the station changing action is completed, the function of the synchronous cam is closed. Because the angle is equal to the product of the angular velocity and the time, when the work station is changed, no matter how much the velocity is during acceleration and deceleration, namely how the angular velocity changes, at a certain moment of the work station change, the product of the angular velocity and the time (the rotating angle) is constant, and the rotating angle of the corresponding compensating mechanism is also constant; in the whole process of changing the station, a cosine-like function curve as shown in fig. 4 is formed. From the station of trading to the end of trading the station, according to the difference of station number, its total angle of rotation is different, if: when three stations are available, the total rotation angle of each station changing is 120 degrees; if there are six stations, the total angle of rotation for each station change is 60 °. No matter how the total rotating angle changes, the rotating angle of the diaphragm compensation floating roller and the rotating angle of the station changing mechanism cell are both shown in fig. 4 in the station changing process. The curve exhibits periodicity as the change of stations is repeated.
When the station changing mode is linear movement and the servo motor is adopted to control the floating roller 4 to linearly move, according to the schematic diagram of the change of the length of the diaphragm during the linear movement of the station changing shown in fig. 5, it can be known that:
before station changing:
after the station is changed:
Figure BDA0001584964720000082
therefore, after the station is changed, the length of the diaphragm is changed into:
Δ L ═ A' -A formula (22)
Wherein A is the length from a fixed roller connected with the station changing mechanism to a diaphragm of the battery cell before the station changing; r is1Is the radius of the cell core; r is2The radius of a fixed roller connected with a station changing mechanism; b is the center distance between a fixed roller connected with the station changing mechanism and the battery cell before the station changing; a'1The length from the fixed roller connected with the station changing mechanism to the diaphragm of the battery cell after station changing, B' the center distance between the fixed roller connected with the station changing mechanism and the battery cell after station changing, β1An included angle between the movement track of the battery cell and a vertical line is formed; delta1The included angle between the connecting line of the fixed roller and the battery cell and the vertical line is set; c is the moving distance of the battery cell; and the delta L is the station changing length of the diaphragm required in station changing.
According to the schematic diagram of the compensation change of the linear movable diaphragm in fig. 6, the following can be known:
before compensation:
Figure BDA0001584964720000091
after compensation:
Figure BDA0001584964720000092
Figure BDA0001584964720000093
then, after deriving the compensation, the diaphragm length variation is:
ΔC＝A1-A′1formula (26)
Wherein A is1Before the compensation mechanism is adjusted, the length of a diaphragm between a fixed roller and a floating roller which are connected with the compensation mechanism is adjusted; b is1Before the compensation mechanism is adjusted, the center distance between a fixed roller and a floating roller which are connected with the compensation mechanism is adjusted; r is3The radius of a fixed roller connected with the compensating mechanism; r is4Is the radius of the floating roll; a'1After the compensation mechanism is adjusted, the length of the diaphragm between the fixed roller and the floating roller which are connected with the compensation mechanism; b'1A fixed roller and a fixed roller which are connected with the compensating mechanism after the compensating mechanism is adjustedCenter distance of floating roll β2The included angle between the motion track of the floating roll and the vertical line is formed; delta2Is the included angle between the central connecting line of the fixed roller and the floating roller connected with the compensating mechanism and the vertical line C1Is the moving distance of the floating roller.
In summary, since the unwinding speed is constant, the total length of the released membrane is unwound in the whole station changing process:
formula (15) where S is vt
V is the unwinding speed of the unwinding mechanism, and t is the station changing time;
thus, the change in diaphragm length required to change stations is made equal to the length of the diaphragm released upon compensation, given the overall equation:
Δ L ═ Δ C + S formula (16)
Substituting the above formula into formula 16 for conversion to obtain a relationship diagram between the moving distance of the linearly movable diaphragm compensation floating roller and the moving distance of the battery cell during linearly movable station changing, as shown in fig. 7, the abscissa is the moving distance C of the station changing battery cell, and the ordinate is the moving distance C of the diaphragm compensation motor driving the floating roller1C and C1In a relation of similar power function. Accelerating the station change from 0, keeping the unwinding speed constant, wherein the diaphragm required by the station change is not enough to consume the unwound diaphragm, and the diaphragm is cached by the compensation mechanism; when the station changing speed reaches a certain value, the diaphragm required by station changing is matched with the unreeling diaphragm, and the diaphragm is cached to the maximum value by the compensation mechanism; when the station changing speed continues to increase to the maximum value, the diaphragm required by station changing is more than the unreeling diaphragm, at the moment, the compensation mechanism releases the diaphragm and slowly restores to the original position, which is shown as a curve section below a point 0 of a vertical coordinate in the figure; when the station is changed to start to decelerate, the needed diaphragm is more than the unreeling diaphragm, so the compensating mechanism still releases the diaphragm at the time; when the work station is decelerated to a certain value, the diaphragm required by the work station is matched with the unreeling diaphragm, and the compensating mechanism releases the diaphragm to the maximum value; the work station is continuously decelerated to stop, the diaphragm required by the work station is less than the unreeling diaphragm, at the moment, the compensation mechanism caches the diaphragm, namely, the diaphragm slowly returns to the original point, which is represented as a curve section above a vertical coordinate 0 point in the figure. Before preparing to change stations, the start-up partitionThe film compensation motor is synchronous with a cam of the station changing motor, and when the station changing motor starts to perform station changing action, the diaphragm compensation motor controls the floating roller to actively move to a corresponding position according to the track of the cam. And when the station changing action is completed, the function of the synchronous cam is closed. The graph shown in fig. 7 appears periodic as the station change is repeated.
Through the mode, when the station is changed, the compensation mechanism is started, the cam of the diaphragm compensation motor is synchronous with the cam of the station changing motor, when the station changing motor performs station changing action, the compensation length of the diaphragm is dynamically adjusted, the sum of the compensation length and the unwinding length of the diaphragm released by the unwinding mechanism is actively consistent with the station changing length of the diaphragm required when the station is changed, so that the diaphragm length required by the station is accurately and effectively compensated, passive compensation is avoided by only utilizing a mechanical structure in the prior art, sudden change of the speed of the diaphragm caused by high-speed station changing is eliminated, the phenomena of diaphragm jumping and pulling are effectively avoided, the production stability of equipment is improved, and the production quality of the equipment is improved.
The foregoing is a more detailed description of the invention in connection with specific/preferred embodiments and is not intended to limit the practice of the invention to those descriptions. It will be apparent to those skilled in the art that various substitutions and modifications can be made to the described embodiments without departing from the spirit of the invention, and these substitutions and modifications should be considered to fall within the scope of the invention.

Claims (4)

1. A method for compensating a diaphragm of a winding machine, comprising: the device comprises an unwinding mechanism, a compensation mechanism and a station changing mechanism, wherein a diaphragm released by the unwinding mechanism is guided into the station changing mechanism through the compensation mechanism; when the station is changed, the compensation mechanism is synchronously adjusted, the distance between the compensation mechanism and the station changing mechanism is changed, and the speed of the compensation mechanism is matched with that of the station changing mechanism, so that the compensation length of the diaphragm is dynamically adjusted; the sum of the compensation length and the unreeling length of the unreeling mechanism releasing the diaphragm is consistent with the station changing length of the diaphragm required by the station changing mechanism in the station changing process;
the compensation mechanism includes: the device comprises a transmission mechanism and a floating roller arranged on the transmission mechanism; the diaphragm released by the unreeling mechanism sequentially passes through the second fixed roller, the floating roller and the first fixed roller and then is guided into the station changing mechanism; when the station is changed, the transmission mechanism drives the floating roller to move, the compensation length of the diaphragm from the floating roller to the first fixed roller is dynamically adjusted, the sum of the compensation length and the unreeling length of the diaphragm released by the unreeling mechanism is equal to the station changing length of the diaphragm required by the station changing mechanism when the station is changed, and the following formula is met:
ΔL＝ΔC+S；
wherein, Δ L is the length of the diaphragm changing station required during station changing, Δ C is the compensation length of the diaphragm from the floating roller to the first fixed roller, and S is the unwinding length of the unwinding mechanism releasing the diaphragm;
the moving mode of the floating roller is consistent with that of the station changing mechanism; the station changing mode of the station changing mechanism comprises a rotary mode and a linear moving mode, and the transmission mechanism drives the floating roller to do rotary motion or linear moving motion;
the transmission mechanism drives the rotation angle of the floating roller and the rotation angular speed of the battery cell during station changing to meet the following formula:
ΔL＝ΔC+S；ΔL＝L′1-L1；ΔC＝L6-L′6；S＝vt；
Figure FDA0002269990920000011
Figure FDA0002269990920000013
Figure FDA0002269990920000014
wherein L is1Before the station is changed, the length from a first fixed roller directly connected with the station changing mechanism to a diaphragm of the battery cell is increased; l'1After the station is changed, the length from a first fixed roller directly connected with the station changing mechanism to a diaphragm of the battery cell is increased; l is6Before the compensation mechanism is adjusted, the length of a diaphragm between a first fixed roller directly connected with a floating roller and the floating roller is adjusted; l'6The length of the diaphragm between the first fixed roller directly connected with the floating roller and the floating roller is adjusted by the compensation mechanism; v is the unwinding speed of the unwinding mechanism, and t is the station changing time;
r1is the radius of the cell core; r is2The radius of a first fixed roller directly connected with the station changing mechanism; r1Rotating the radius for changing the station; l is3The center distance between a first fixed roller directly connected with the station changing mechanism and a winding head is used; theta1Before changing station, L3And R1Angle therebetween α1The angle of rotation of the cell;
R2the rotating radius of the floating roller; l is5The center distance between the first fixed roller directly connected with the floating roller and the rotation center of the floating roller; theta2Before adjustment for the compensating mechanism, L5And R2The included angle between them; r is3The radius of the first fixed roller directly connected with the floating roller; r is4Radius of the floating roll α2The rotating angle of the floating roller is the rotating angle of the floating roller;
or the like, or, alternatively,
the transmission mechanism drives the floating roller to move by a distance which satisfies the following formula with the distance of the cell moving when the station is changed:
ΔL＝ΔC+S；ΔL＝A′-A；ΔC＝A1-A′1；S＝vt；
Figure FDA0002269990920000021
Figure FDA0002269990920000022
Figure FDA0002269990920000023
Figure FDA0002269990920000024
Figure FDA0002269990920000025
Figure FDA0002269990920000026
wherein A is the length from a first fixed roller directly connected with the station changing mechanism to a diaphragm of the battery cell before the station changing mechanism; a' is the length from a first fixed roller directly connected with the station changing mechanism to a diaphragm of the battery cell after the station is changed; a. the1Before the compensation mechanism is adjusted, the length of a diaphragm between a first fixed roller directly connected with a floating roller and the floating roller is adjusted; a'1The length of the diaphragm between the first fixed roller directly connected with the floating roller and the floating roller is adjusted by the compensation mechanism; v is the unwinding speed of the unwinding mechanism, and t is the station changing time;
r1is the radius of the cell core; r is2The radius of a first fixed roller connected with a station changing mechanism, the center distance between the first fixed roller directly connected with the station changing mechanism and the battery cell before the station changing, the center distance between the first fixed roller directly connected with the station changing mechanism and the battery cell after the station changing, β1An included angle between the movement track of the battery cell and a vertical line is formed; delta1The included angle between the connecting line of the first fixed roller and the electric core which are directly connected with the station changing position and the vertical line is formed; c is the moving distance of the battery cell;
r3the radius of a first fixed roller connected with the floating roller; r is4Is the radius of the floating roll; b is1Before the compensation mechanism is adjusted, the center distance between a first fixed roller directly connected with the floating roller and the floating roller is adjusted; b'1β center distance between the first fixed roller and the floating roller directly connected with the floating roller after being adjusted by the compensation mechanism2The included angle between the motion track of the floating roll and the vertical line is formed; delta2The included angle between the center connecting line of the first fixed roller and the floating roller which are directly connected with the floating roller and the vertical line is formed; c1Is the moving distance of the floating roller.
2. The method of claim 1, wherein the transmission mechanism comprises: the power unit is connected with the transmission unit, and the floating roller is arranged on the transmission unit.
3. The method of claim 2, wherein the power unit comprises: a motor or a cylinder, and the transmission unit comprises a rocker arm.
4. A method according to claim 3, wherein the motor or cylinder is connected to the middle or one end of the rocker arm and the dancer is provided at the other end of the rocker arm.
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