CN112749491B - Method, device and storage medium for estimating thickness of single body of winding type energy storage device - Google Patents
Method, device and storage medium for estimating thickness of single body of winding type energy storage device Download PDFInfo
- Publication number
- CN112749491B CN112749491B CN202110033464.2A CN202110033464A CN112749491B CN 112749491 B CN112749491 B CN 112749491B CN 202110033464 A CN202110033464 A CN 202110033464A CN 112749491 B CN112749491 B CN 112749491B
- Authority
- CN
- China
- Prior art keywords
- thickness
- winding
- reel
- wound
- diaphragm
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Secondary Cells (AREA)
- Computer Hardware Design (AREA)
- Evolutionary Computation (AREA)
- Geometry (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
Abstract
The invention relates to a method for estimating the thickness of a single body of a winding type energy storage device, which comprises the following steps: obtaining the size of a reel of a winding machine, and establishing an estimation model according to the size of the reel; determining the number of winding layers of the single body according to the estimation model; and determining the thickness of the monomer according to the thickness of the anode, the thickness of the cathode, the thickness of the diaphragm and the number of winding layers of the monomer. The winding type energy storage device can be universally applied to various soft packages, has universality, and can reduce a large amount of raw material cost such as an electrode or a diaphragm and the like through pre-evaluation, and meanwhile can reduce corresponding labor and time cost. The invention also discloses a device and a storage medium for estimating the thickness of the single body of the winding type energy storage device.
Description
Technical Field
The present disclosure relates to the field of energy storage devices, and more particularly, to a method and an apparatus for estimating a thickness of a single body of a wound energy storage device, and a storage medium.
Background
Compared with columnar and hard-shell energy storage devices, the soft-package energy storage device has the advantages of large volume energy density, good heat dissipation performance, low cost and the like, and gradually becomes a trend of future development. The soft package energy storage device is divided into a winding type and a laminated type. Compared with a laminated device, the winding type energy storage device has higher production efficiency and lower equipment cost and is convenient for batch production. When designing an energy storage device, the matching between the wound battery cell and the punching depth of the aluminum-plastic film at the rear end is very important, and the compatibility of equipment is directly determined.
In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art: in actual production, the thickness of the wound battery cell cannot be obtained only by the lengths of the positive electrode, the negative electrode and the diaphragm calculated according to design requirements, and incompatibility between the front end winding process and the size of the rear end battery cell in a pit can be caused; if it takes a lot of time and labor costs to calculate the corresponding cell thickness after winding different electrode lengths and separator lengths, a lot of raw material loss and a reduction in productivity may be caused.
Disclosure of Invention
The embodiment of the disclosure provides a method and a device for estimating the thickness of a single body of a winding type energy storage device and a storage medium, so as to solve the technical problem that the thickness of a wound battery cell cannot be obtained to a certain extent, which causes incompatibility in the front-end winding process and the size of a pit of a rear-end battery cell.
In a first aspect, a method for estimating a cell thickness of a wound energy storage device is provided, the method comprising: obtaining the size of a reel of a winding machine, and establishing an estimation model according to the size of the reel; determining the number of winding layers of the single body according to the estimation model; and determining the thickness of the monomer according to the thickness of the anode, the thickness of the cathode, the thickness of the diaphragm and the number of winding layers of the monomer.
With reference to the first aspect, in a first possible implementation manner of the first aspect, the determining the thickness of the monomer includes: and determining a first thickness and a second thickness of the single body after winding according to the degree of tightness of the single body winding, wherein the first thickness is greater than the second thickness.
With reference to the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the determining the thickness of the monomer further includes: and averaging the first thickness and the second thickness to obtain a third thickness, wherein the third thickness is the thickness of the monomer.
With reference to the first aspect, in a third possible implementation manner of the first aspect, the determining, according to the estimation model, the number of winding layers of the single body includes: determining the circumference of the reel according to the estimation model; and determining the number of winding layers according to the winding length and the circumference of the single electrode.
With reference to the first aspect or the third possible implementation manner of the first aspect, in a fourth possible implementation manner of the first aspect, the number of winding layers includes: the number of winding layers of the single positive electrode, the number of winding layers of the single negative electrode, and the number of winding layers of the single separator.
With reference to the fourth possible implementation manner of the first aspect, in a fifth possible implementation manner of the first aspect, the positive electrode thickness T of the single body is determined Is just A thickness T of the negative electrode Negative pole Thickness T of the diaphragm Diaphragm And the number of winding layers, determining the thickness T of the single body Monomer Comprising determining the thickness of said monomer by the formula: t is Monomer ＝T Winding of +T Is just ×n Is just +T Negative pole ×n Negative pole +T Diaphragm ×n Diaphragm
Wherein, T Winding of N is determined according to different winding tightness degrees of the single bodies Is just Is the number of winding layers of the positive electrode, n Negative pole Is the number of winding layers of the negative electrode, n Diaphragm The number of winding layers of the separator.
With reference to the first aspect, in a sixth possible implementation manner of the first aspect, the obtaining a reel size of a winding machine, and establishing an estimation model according to the reel size includes: obtaining the length 2a and the width 2b of the scroll and the included angle alpha of the two side surfaces of the end part of the scroll, and approximating the section of the scroll to be an ellipse O according to the length, the width and the included angle.
With reference to the sixth possible implementation manner of the first aspect, in a seventh possible implementation manner of the first aspect, determining the number of winding layers of the single body according to the estimation model includes calculating the number of winding layers n by using the following formula:
where T is the thickness of the electrode and b' is the minor semi-axis length of the ellipse.
In a second aspect, there is provided an apparatus for estimating the cell thickness of a wound energy storage device, comprising: the modeling module is used for acquiring the size of a reel of the winding machine and establishing an estimation model according to the size of the reel; the winding layer number acquisition module is used for determining the winding layer number of the single body according to the estimation model; and the monomer thickness obtaining module is used for determining the thickness of the monomer according to the thickness of the anode, the thickness of the cathode, the thickness of the diaphragm and the number of winding layers of the monomer.
In a third aspect, a storage medium is provided, the storage medium storing a computer program comprising program instructions which, when executed by a processor, cause the processor to carry out the aforementioned method for estimating the thickness of a cell of a wound energy storage device.
The method, the device and the storage medium for estimating the thickness of the single body of the winding type energy storage device provided by the embodiment of the disclosure can realize the following technical effects:
the winding type energy storage device can be universally applied to various soft packages, has universality, and can reduce a large amount of raw material cost such as an electrode or a diaphragm and the like through pre-evaluation, and meanwhile can reduce corresponding labor and time cost.
The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the accompanying drawings and not in limitation thereof, in which elements having the same reference numeral designations are shown as like elements and not in limitation thereof, and wherein:
fig. 1 is a schematic flow diagram of a method for estimating a cell thickness of a wound energy storage device according to an embodiment of the disclosure;
FIG. 2 is a cross-sectional view of a plane in which the axis of the spool having a greater length is located, as provided by an embodiment of the present disclosure;
FIG. 3 is a schematic illustration of modeling the spool profile of FIG. 2 provided by an embodiment of the disclosure;
FIG. 4 is another schematic illustration of modeling the spool profile of FIG. 2 provided by an embodiment of the present disclosure;
FIG. 5 is a schematic illustration of a cell electrode and separator wrap provided by an embodiment of the present disclosure;
FIG. 6 is another schematic illustration of a cell electrode and separator wrap provided by an embodiment of the present disclosure;
fig. 7 is a schematic diagram illustrating a comparison result between an estimated thickness of a wound battery cell and a measured battery cell thickness according to an embodiment of the present disclosure;
fig. 8 is an error between simulated and experimental values provided by embodiments of the present disclosure.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments provided in the present application without any inventive step are within the scope of protection of the present application.
It is obvious that the drawings in the following description are only examples or embodiments of the application, and that it is also possible for a person skilled in the art to apply the application to other similar contexts on the basis of these drawings without inventive effort. Moreover, it should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions must be made to achieve the developers' specific goals, such as compliance with system-related and business-related constraints, which may vary from one implementation to another.
Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the specification. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is to be expressly and implicitly understood by one of ordinary skill in the art that the embodiments described herein may be combined with other embodiments without conflict.
Unless defined otherwise, technical or scientific terms referred to herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which this application belongs. The use of the terms "a" and "an" and "the" and similar referents in the context of describing the invention (including a single reference) are to be construed in a non-limiting sense as indicating either the singular or the plural. The use of the terms "including," "comprising," "having," and any variations thereof herein, is meant to cover a non-exclusive inclusion; for example, a process, method, system, article, or apparatus that comprises a list of steps or modules (elements) is not limited to only those steps or elements but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Lithium ion battery and ultracapacitor system have obtained extensive attention and research as two kinds of most common energy storage component at present, and on this basis, in order to compromise lithium ion battery's great energy density and ultracapacitor system's great power density, on the basis of original two kinds of energy storage component, new energy storage device emerges gradually, if: lithium ion capacitors, hybrid capacitors, battery-type supercapacitors, and the like.
Both the traditional lithium ion battery and the supercapacitor as well as the novel energy storage device are designed by a material system and a structure aiming at improving the energy density and the power density, at present, the material system of the energy storage device is basically stable, the mass production difficulty of pioneering materials is high, and the possibility of improving the mass energy density or the volume energy density from the material perspective is not high, so that the method for effectively improving the energy density of the energy storage device by designing the structure of the energy storage device is provided.
Fig. 1 is a schematic flow chart diagram of a method for estimating a cell thickness of a wound energy storage device according to an embodiment of the present disclosure. As shown in fig. 1, an embodiment of the present disclosure provides a method for estimating a cell thickness of a wound energy storage device, the method including: step S1: obtaining the size of a reel of a winding machine, and establishing an estimation model according to the size of the reel; step S2: determining the number of winding layers of the single body according to the estimation model; and step S3: and determining the thickness of the monomer according to the thickness of the anode, the thickness of the cathode, the thickness of the diaphragm and the number of winding layers of the monomer.
The method for estimating the thickness of the single body of the winding type energy storage device provided by the embodiment of the disclosure can realize the following technical effects: the winding type energy storage device can be universally applied to various soft packages, has universality, and can reduce a large amount of raw material cost such as an electrode or a diaphragm and the like through pre-evaluation, and meanwhile can reduce corresponding labor and time cost.
In some embodiments, obtaining spool dimensions of a winding machine and building an estimation model based on the spool dimensions includes: the length 2a and the width 2b of the reel and the included angle alpha of two side surfaces of the end part of the reel are obtained, and the section of the reel is approximate to an ellipse O according to the length, the width and the included angle. FIG. 2 is a cross-sectional view of a plane in which the axis of the spool having a greater length is located, according to an embodiment of the present disclosure. As shown in fig. 2, obtaining the reel size of the winding machine includes: the length of the obtained reel is 2a, the width of the reel is 2b, and the included angle of two side surfaces of the end part of the reel is alpha. Fig. 2 is a cross-sectional view of a reel provided in an embodiment of the present disclosure, which may be approximately elliptical O. FIG. 3 is a schematic diagram of modeling the spool profile of FIG. 2 provided by an embodiment of the present disclosure. As shown in fig. 3, the inflection points a, B, C, D, E, and F of the cross-sectional surface shown in fig. 2 are taken as end points, an estimation model is established to obtain a hexagonal ABCDEF, and a rectangular coordinate system is established with the direction of the axis with the longer length as the abscissa, the direction of the axis with the shorter length as the ordinate, and the origin as O. As can be taken from fig. 2 and 3, the hexagon ABCDEF is approximated as an ellipse O, where OA and OD are the major half length a, OH is half the spool width b, angle BAF = α, the major axis length of the ellipse is the spool length 2a, and the minor axis length of the ellipse is 2b'.
FIG. 4 is another schematic illustration of modeling the spool profile of FIG. 2 provided by an embodiment of the present disclosure. In some embodiments, the short semi-axial length of the ellipse is obtained from the length and width of the reel and the included angle between the two sides of the end of the reel, and the short semi-axial length b' of the ellipse is calculated by the following formula:
as shown in fig. 4, a perpendicular to OA passing through point B intersects OA at point G, GB = OH = B,
the coordinates of the point B can be obtained
From standard equations of ellipses
The relation between the short semi-axis length B' of the ellipse and the width B of the reel can be obtained by substituting the coordinates of the point B into the standard equation of the ellipse.
In some embodiments, when estimating the number of winding layers of the single body, the winding of the electrode and the separator on the reel can be simplified. According to the estimation model, the first circle of electrode and diaphragm winding is wound along the perimeter of an ellipse O, then the wound battery cores all take the O as the center of the ellipse to form a series of concentric ellipses, and the first circle of electrode and diaphragm winding along the perimeter C of a reel 1 In order to realize the purpose,
C 1 ＝2×π×b′+4×(a-b′)
according to C 1 The calculation formula (2) can obtain that the circumference of the n-th turn wound on the reel is C n ，
C n ＝2×π×b′ n +4×(a n -b′ n )
Wherein, a n Is the intercept on the abscissa, b 'of the ellipse corresponding to the winding n-th circle' n For winding the ellipse corresponding to the n-th turn on the ordinateAnd (3) an upper intercept. Can be obtained as n ＝a+n×T，b′ n = b' + n × T, T being the thickness of the electrode, and including the foil and the electrode material layers on both sides. The circumference of the cell wound in each winding layer can be expressed as:
C 1 ＝2×π×b′+4×(a-b′)
C 2 ＝2×π×(b′+T)+4×(a+n×T-b′-n×T)
＝2×π×(b′+T)+4×(a-b′)
C 3 ＝2×π×(b′+2×T)+4×(a-b′)
C 4 ＝2×π×(b′+3×T)+4×(a-b′)
…
according to C 1 、C 2 、C 3 And C 4 And can be obtained by analogy,
C n ＝2×π×[b′+(n-1)×T]+4×(a-b′)
the total length L of the electrode and separator wound n turns along the reel is,
the formula is arranged to obtain:
π×T×n 2 +[2×π×b′+4×(a-b′)-π×T]×n-L＝0
and then obtaining the number n of winding layers:
in some embodiments, the total length L of the single positive winding is taken Is just Total length L of single negative electrode winding Negative pole And total length L of winding of the single separator Diaphragm . The total length of the single anode and single cathode windings can be obtained according to the energy design of the energy storage device and the parameters of the electrodes. The winding length of the single separator may be determined according to the fact that the winding length of the separator is 1.25 times the winding length of the negative electrode. Those skilled in the art can determine the monomer according to the actual design requirementsTotal length of winding of the electrode, negative electrode and separator.
In some embodiments, determining the number of winding layers of the single body according to an estimation model comprises: determining the circumference C of the reel according to the estimation model; the number of winding layers is determined according to the winding length and the circumference C of the electrode of the single body.
In some embodiments, determining the number of winding layers of the cells according to an estimation model comprises calculating the number of winding layers n by the following formula:
where T is the thickness of the electrode and b' is the minor semi-axis length of the ellipse.
In some embodiments, the number of layers wound includes: the number of winding layers of the single positive electrode, the number of winding layers of the single negative electrode, and the number of winding layers of the single separator. Mixing L with Is just 、L Negative pole And L Diaphragm Substituting the formula into the formula for calculating the winding layer number n, and calculating the winding layer number n of the single anode Is just for The number n of winding layers of the single negative electrode Negative pole And the number n of winding layers of the single separator Diaphragm 。
In some embodiments, the thickness of the anode T depends on the monomer Is just A thickness T of the negative electrode Negative pole Thickness T of the diaphragm Diaphragm And the number of winding layers, determining the thickness T of the single body Monomer Comprising determining the thickness of the monomer by the formula:
T monomer ＝T Winding of +T Is just ×n Is just +T Negative pole ×n Negative pole +T Diaphragm ×n Diaphragm
Wherein, T Winding of Determined according to the different winding tightness of the single bodies, n Is just for Is the number of winding layers of the positive electrode, n Negative pole Number of layers wound as a negative electrode, n Diaphragm The number of wound layers of the separator. The person skilled in the art can determine different winding tightness degrees of the single body according to actual production needs or design requirements, and further determine T Winding of 。
In some embodiments, determining the thickness of the monomer comprises: and determining a first thickness and a second thickness of the wound single body according to the degree of tightness of the single body winding, wherein the first thickness is smaller than the second thickness. The first thickness may be a minimum of the thickness of the monolith and the second thickness may be a maximum of the thickness of the monolith. Fig. 5 is a schematic diagram of a cell electrode and separator wrap provided by an embodiment of the present disclosure. Fig. 6 is another schematic diagram of a cell electrode and separator wrap provided by an embodiment of the present disclosure. As shown in fig. 5 and fig. 6, fig. 5 is a schematic diagram of a loose battery cell after winding, and the thickness T of the wound single body can be obtained according to fig. 5 Loosening ，T Loosening Can be calculated by the following formula,
T loosening of the loose material ＝T Winding of +T Is just ×n Is just +T Negative pole ×n Negative pole +T Diaphragm ×n Diaphragm
＝T Reel shaft +T Is just ×n Is just +T Negative pole ×n Negative pole +T Diaphragm ×n Diaphragm
＝2×b+T Is just for ×n Is just for +T Negative pole ×n Negative pole +T Diaphragm ×n Diaphragm
FIG. 6 is a schematic diagram of a relatively compact cell after winding, and the thickness T of the wound cell can be obtained according to FIG. 6 Compact ，T Compact Can be calculated by the following formula Compact ＝T Loosening -2×b+2×b′-2×b＝2×(b′-b)+T Is just for ×n Is just +T Negative pole ×n Negative pole +T Diaphragm ×n Diaphragm 。
In some embodiments, determining the thickness of the monomer further comprises: averaging the first thickness and the second thickness to obtain a third thickness, wherein the third thickness is the thickness T of the monomer Monomer . In the course of implementing embodiments of the present disclosure, T may be Loosening of the loose material As a value of the first thickness, T Compact As the value of the second thickness, other T determined by those skilled in the art according to the winding condition of the monomer can be used Winding of As a value of the first thickness or the second thickness. To obtain rolled-up unitsThickness of
The embodiment of the present disclosure also provides an apparatus for estimating a thickness of a single body of a wound energy storage device, including: the modeling module is used for acquiring the size of a reel of the winding machine and establishing an estimation model according to the size of the reel; the winding layer number obtaining module is used for determining the winding layer number of the single body according to the estimation model; and the monomer thickness acquisition module is used for determining the thickness of the monomer according to the thickness of the anode, the thickness of the cathode, the thickness of the diaphragm and the number of winding layers of the monomer.
It should be noted that the above modules may be functional modules or program modules, and may be implemented by software or hardware. For a module implemented by hardware, the modules may be located in the same processor; or the modules can be respectively positioned in different processors in any combination.
The embodiment of the present disclosure also provides an apparatus for estimating a thickness of a wound energy storage device, including: a processor, a memory and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the aforementioned method for estimating a thickness of a wound energy storage device.
Embodiments of the present disclosure also provide a storage medium storing a computer program comprising program instructions which, when executed by a processor, cause the processor to carry out the aforementioned method for estimating a thickness of a wound energy storage device.
Fig. 7 is a diagram illustrating a comparison result between an estimated thickness of a wound cell and a measured cell thickness provided by an embodiment of the present disclosure. For the positive electrode, the negative electrode and the diaphragm of different lengths wound by the winding machine, by adopting the method, the device or the storage medium for estimating the thickness of the wound energy storage device monomer provided by the embodiment of the disclosure, the estimated thickness of the wound battery cell and the actually measured battery cell thickness are compared to obtain a result, as shown in fig. 7, the abscissa in fig. 7 is the experiment number, the ordinate is the battery cell thickness, the square point in the figure represents the simulation value, the circular point represents the experiment value, and according to the curve in fig. 7, the experiment value and the simulation value are almost coincident, which indicates that the method, the device or the storage medium has stronger accuracy for estimating the thickness of the wound battery cell. Fig. 8 is an error between simulated and experimental values provided by embodiments of the present disclosure. As shown in fig. 8, the abscissa in fig. 8 is the experiment number, the ordinate is the deviation between the simulated value and the experimental value, the deviation range between the experimental value and the simulated value is 0.16% to 0.17% according to fig. 8, the simulation accuracy reaches about 99%, and the method has a strong guiding significance for production evaluation of a production line, product design and compatibility evaluation of processes in front and rear sections of the production line.
The embodiment of the disclosure starts from a winding process, and realizes calculation of the number of winding layers and the final winding thickness of a formed monomer according to the monomer parameters by reasonably establishing a mathematical estimation model, and verifies the accuracy of the model through experiments, thereby providing early technical support for the monomer design of a battery or capacitor manufacturer, and avoiding waste of raw materials and increase of labor cost.
The foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in other forms, so that those skilled in the art may apply the above-described modifications and variations to the disclosed embodiments without departing from the spirit of the present invention.
Claims (7)
1. A method for estimating cell thickness of a wound energy storage device, comprising:
obtaining the size of a reel of a winding machine, and establishing an estimation model according to the size of the reel, wherein the estimation model comprises the following steps: acquiring the length 2a and the width 2b of the reel and an included angle alpha of two side surfaces of the end part of the reel, and approximating the section of the reel to be an ellipse O according to the length, the width and the included angle;
determining the number of winding layers of the single body according to the estimation model, wherein the first circle of winding of the electrode and the diaphragm is wound along the perimeter of an ellipse O according to the estimation model, then all the wound battery cores take the O as the center of the ellipse to form a series of concentric ellipses, and the perimeter C of the first circle of winding of the electrode and the diaphragm along a scroll is 1 Comprises the following steps:
C 1 ＝2×π×b′+4×(a-b′)
wherein b' is the minor semi-axis length of the ellipse;
according to C 1 To obtain the circumference C of the n-th turn wound on the reel n Comprises the following steps:
C n ＝2×π×b′ n +4×(a n -b′ n )
wherein, a n Is the intercept on the abscissa, b 'of the ellipse corresponding to the winding n-th circle' n The intercept on the ordinate of the ellipse corresponding to the nth winding is wound to obtain a n ＝a+n×T，b′ n = b' + n × T, T being the thickness of the electrode and including the foil and the electrode material layers on both sides; the circumference of the core wound in each winding layer is represented as:
C 1 ＝2×π×b′+4×(a-b′)
C 2 ＝2×π×(b′+T)+4×(a+n×T-b′-n×T)
＝2×π×(b′+T)+4×(a-b′)
C 3 ＝2×π×(b′+2×T)+4×(a-b′)
C 4 ＝2×π×(b′+3×T)+4×(a-b′)
according to C 1 、C 2 、C 3 And C 4 By analogy, we obtain:
C n ＝2×π×[b′+(n-1)×T]+4×(a-b′)
the total length L of the electrode and separator wound n turns along the reel is:
the formula is arranged to obtain:
π×T×n 2 +[2×π×b′+4×(a-b′)-π×T]×n-L＝0
and further obtaining the number n of winding layers:
and determining the thickness of the single body according to the thickness of the anode, the thickness of the cathode, the thickness of the diaphragm and the number of the winding layers of the single body.
2. The method of claim 1, wherein determining the thickness of the monomer comprises: and determining a first thickness and a second thickness of the single body after winding according to the degree of tightness of the single body winding, wherein the first thickness is greater than the second thickness.
3. The method of claim 2, wherein determining the thickness of the monomer further comprises: and averaging the first thickness and the second thickness to obtain a third thickness, wherein the third thickness is the thickness of the monomer.
4. The method of claim 1, wherein the number of winding layers comprises: the number of winding layers of the single positive electrode, the number of winding layers of the single negative electrode, and the number of winding layers of the single separator.
5. The method of claim 4, wherein the positive electrode thickness T is determined by the monomer Is just A thickness T of the negative electrode Negative pole Thickness T of the diaphragm Diaphragm And the number of winding layers, determining the thickness T of the single body Monomer Comprising determining the thickness of said monomer by the formula:
T monomer ＝T Winding of +T Is just ×n Is just +T Negative pole ×n Negative pole +T Diaphragm ×n Diaphragm
Wherein, T Winding of N is determined according to different winding tightness degrees of the single bodies Is just for Is the number of winding layers of the positive electrode, n Negative pole Is the number of winding layers of the negative electrode, n Diaphragm The number of layers of the membrane to be wound is set.
6. An apparatus for estimating the cell thickness of a wound energy storage device, comprising:
the modeling module is used for acquiring the size of a reel of the winding machine and establishing an estimation model according to the size of the reel; obtaining the size of a reel of a winding machine, and establishing an estimation model according to the size of the reel, wherein the estimation model comprises the following steps: acquiring the length 2a and the width 2b of the reel and an included angle alpha of two side surfaces of the end part of the reel, and approximating the section of the reel to be an ellipse O according to the length, the width and the included angle;
the winding layer number obtaining module is used for determining the winding layer number of the single body according to the estimation model; determining the number of winding layers of the single body according to the estimation model, wherein the first circle of winding of the electrode and the diaphragm is wound along the perimeter of an ellipse O according to the estimation model, then all the wound battery cores take the O as the center of the ellipse to form a series of concentric ellipses, and the perimeter C of the first circle of winding of the electrode and the diaphragm along a scroll is 1 Comprises the following steps:
C 1 ＝2×π×b′+4×(a-b′)
wherein b' is the minor semi-axis length of the ellipse;
according to C 1 To obtain the circumference C of the n-th turn wound on the reel n Comprises the following steps:
C n ＝2×π×b′ n +4×(a n -b′ n )
wherein, a n Is the intercept on the abscissa, b 'of the ellipse corresponding to the winding n-th circle' n The intercept on the ordinate of the ellipse corresponding to the nth winding is wound to obtain a n ＝a+n×T，b′ n = b' + n × T, T being the thickness of the electrode and including a foil and electrode material layers on both sides; the circumference of the cell wound in each winding layer is represented as:
C 1 ＝2×π×b′+4×(a-b′)
C 2 ＝2×π×(b′+T)+4×(a+n×T-b′-n×T)
＝2×π×(b′+T)+4×(a-b′)
C 3 ＝2×π×(b′+2×T)+4×(a-b′)
C 4 ＝2×π×(b′+3×T)+4×(a-b′)
according to C 1 、C 2 、C 3 And C 4 By analogy, we obtain:
C n ＝2×π×[b′+(n-1)×T]+4×(a-b′)
the total length L of the electrode and separator wound n turns along the reel is:
the formula is arranged to obtain:
π×T×n 2 +[2×π×b′+4×(a-b′)-π×T]×n-L＝0
and then obtaining the number n of winding layers:
and the monomer thickness obtaining module is used for determining the thickness of the monomer according to the thickness of the anode, the thickness of the cathode, the thickness of the diaphragm and the number of winding layers of the monomer.
7. A storage medium characterized in that it stores a computer program comprising program instructions which, when executed by a processor, cause the processor to carry out the method for estimating the cell thickness of a wound energy storage device according to any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110033464.2A CN112749491B (en) | 2021-01-11 | 2021-01-11 | Method, device and storage medium for estimating thickness of single body of winding type energy storage device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110033464.2A CN112749491B (en) | 2021-01-11 | 2021-01-11 | Method, device and storage medium for estimating thickness of single body of winding type energy storage device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112749491A CN112749491A (en) | 2021-05-04 |
| CN112749491B true CN112749491B (en) | 2023-03-03 |
Family
ID=75650706
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110033464.2A Active CN112749491B (en) | 2021-01-11 | 2021-01-11 | Method, device and storage medium for estimating thickness of single body of winding type energy storage device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112749491B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115064755B (en) * | 2022-08-16 | 2022-11-25 | 江苏时代新能源科技有限公司 | Winding method and winding system |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102820489A (en) * | 2012-08-28 | 2012-12-12 | 深圳市美拜电子有限公司 | Manufacturing method of winding needle, manufacturing method of lithium ion battery and lithium ion battery |
| CN202905885U (en) * | 2012-04-16 | 2013-04-24 | 宁德新能源科技有限公司 | Quadrate lithium ion battery having coiled structure |
| CN103863889A (en) * | 2012-12-12 | 2014-06-18 | 日立金属株式会社 | Wire winding device and wire winding method |
| CN105540348A (en) * | 2016-02-19 | 2016-05-04 | 成都宏明电子股份有限公司 | Oval reel for producing wound capacitor unit core and wound capacitor unit core |
| CN205397719U (en) * | 2016-02-19 | 2016-07-27 | 成都宏明电子股份有限公司 | A oval spool and wound capacitor unit core for producing wound capacitor unit core |
| CN105865392A (en) * | 2016-05-25 | 2016-08-17 | 北京新能源汽车股份有限公司 | Measuring device for measuring thickness change of soft package power battery |
| CN205985231U (en) * | 2016-08-16 | 2017-02-22 | 惠州亿纬锂能股份有限公司 | Core structure of lithium ion battery |
| CN107293807A (en) * | 2016-04-11 | 2017-10-24 | Ckd株式会社 | Coiler device |
| CN108172883A (en) * | 2017-12-20 | 2018-06-15 | 惠州亿纬锂能股份有限公司 | A kind of computational methods, device, equipment and the storage medium of battery roll core parameter |
| CN110391393A (en) * | 2019-06-06 | 2019-10-29 | 上海德朗能动力电池有限公司 | A kind of takeup type cylindrical lithium battery electrode |
| CN110911762A (en) * | 2019-10-30 | 2020-03-24 | 郑州比克电池有限公司 | Method for preventing winding wrinkles of lithium battery cell |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1787272A (en) * | 2004-12-08 | 2006-06-14 | 天津力神电池股份有限公司 | Coiled type polymer lithium ion battery and mfg. method thereof |
| CN109390639A (en) * | 2018-09-03 | 2019-02-26 | 中车青岛四方车辆研究所有限公司 | Pregnant solution type accumulation energy type nickel-metal hydride battery and its application on rail vehicle auxiliary power supply system |
| CN109902372B (en) * | 2019-02-20 | 2023-04-18 | 重庆长安汽车股份有限公司 | Battery roll core simulation method based on finite element analysis |
-
2021
- 2021-01-11 CN CN202110033464.2A patent/CN112749491B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202905885U (en) * | 2012-04-16 | 2013-04-24 | 宁德新能源科技有限公司 | Quadrate lithium ion battery having coiled structure |
| CN102820489A (en) * | 2012-08-28 | 2012-12-12 | 深圳市美拜电子有限公司 | Manufacturing method of winding needle, manufacturing method of lithium ion battery and lithium ion battery |
| CN103863889A (en) * | 2012-12-12 | 2014-06-18 | 日立金属株式会社 | Wire winding device and wire winding method |
| CN105540348A (en) * | 2016-02-19 | 2016-05-04 | 成都宏明电子股份有限公司 | Oval reel for producing wound capacitor unit core and wound capacitor unit core |
| CN205397719U (en) * | 2016-02-19 | 2016-07-27 | 成都宏明电子股份有限公司 | A oval spool and wound capacitor unit core for producing wound capacitor unit core |
| CN107293807A (en) * | 2016-04-11 | 2017-10-24 | Ckd株式会社 | Coiler device |
| CN105865392A (en) * | 2016-05-25 | 2016-08-17 | 北京新能源汽车股份有限公司 | Measuring device for measuring thickness change of soft package power battery |
| CN205985231U (en) * | 2016-08-16 | 2017-02-22 | 惠州亿纬锂能股份有限公司 | Core structure of lithium ion battery |
| CN108172883A (en) * | 2017-12-20 | 2018-06-15 | 惠州亿纬锂能股份有限公司 | A kind of computational methods, device, equipment and the storage medium of battery roll core parameter |
| CN110391393A (en) * | 2019-06-06 | 2019-10-29 | 上海德朗能动力电池有限公司 | A kind of takeup type cylindrical lithium battery electrode |
| CN110911762A (en) * | 2019-10-30 | 2020-03-24 | 郑州比克电池有限公司 | Method for preventing winding wrinkles of lithium battery cell |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112749491A (en) | 2021-05-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107394097B (en) | Method for accurately positioning tab positions of multi-tab winding type lithium ion battery | |
| CN112749491B (en) | Method, device and storage medium for estimating thickness of single body of winding type energy storage device | |
| WO2010124635A1 (en) | Lithium-ion power battery | |
| CN105609882B (en) | Energy storage device with internal multi-core stacked layers | |
| WO2013010473A1 (en) | Method of winding cell of lithium ion battery | |
| CN109980230A (en) | Takeup type battery core and electrochemical appliance | |
| CN103050676A (en) | Lithium-ion power battery and quick charging electric automobile with same | |
| US20230207969A1 (en) | Lithium-ion cell, battery and power device | |
| CN103296315B (en) | Wound lithium ion battery | |
| JP2011076785A (en) | Rectangular lithium secondary battery | |
| CN103259050B (en) | A kind of wound lithium-ion battery | |
| CN211858829U (en) | Reference electrode and three-electrode battery | |
| CN106571443A (en) | Battery pole piece rolling device and battery pole piece | |
| CN209389151U (en) | Square lithium ion battery structure with optimized inner space | |
| CN102820489B (en) | Manufacturing method of winding needle, manufacturing method of lithium ion battery and lithium ion battery | |
| CN113644329A (en) | Reference electrode, three-electrode battery and manufacturing method thereof | |
| CN218039281U (en) | Negative plate and battery | |
| CN212659580U (en) | Battery cell for preventing external short circuit of lithium ion battery | |
| CN112290130B (en) | Spherical polymer lithium battery and manufacturing method thereof | |
| CN113192764A (en) | Preparation method and preparation device of high-sealing lithium ion capacitor | |
| CN105322235A (en) | Spirally wound lithium-ion battery | |
| CN212907800U (en) | Pole piece and lithium ion battery | |
| CN217035723U (en) | Wave-shaped lithium battery | |
| CN217903248U (en) | Battery with a battery cell | |
| JP5775195B2 (en) | Square lithium secondary battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |