CN102903960A - Device and method for manufacturing lithium ion battery winding spacing - Google Patents
Device and method for manufacturing lithium ion battery winding spacing Download PDFInfo
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- CN102903960A CN102903960A CN2012103532699A CN201210353269A CN102903960A CN 102903960 A CN102903960 A CN 102903960A CN 2012103532699 A CN2012103532699 A CN 2012103532699A CN 201210353269 A CN201210353269 A CN 201210353269A CN 102903960 A CN102903960 A CN 102903960A
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- 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
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- 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
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- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The invention belongs to the technical field of lithium ion battery manufacture, and in particular relates to a device for manufacturing lithium ion battery winding spacing. The device comprises pole piece driving wheels, a diaphragm driving wheel, a winding machine, a PLC controller, an encoder, a transducer and a coating machine. The PLC controller is electrically connected with the encoder, the transducer and the coating machine respectively; the encoder is connected with the pole piece driving wheels, the diaphragm driving wheel, the winding machine and the coating machine; and the coating machine is provided with a coating head and a control system. Compared with the prior art, the encoder and the transducer are used to collect data of transport speed and displacement of the pole pieces, and feedback the data to the PLC controller; and the PLC controller controls the coating machine to coat corners of the pole pieces, so as to achieve precise coating on the pole pieces, and obtain a coating layer with precisely controlled position, shape, size and thickness. In addition, the device can conduct automatic coating on the pole pieces to greatly improve production efficiency.
Description
Technical field
The invention belongs to technical field of lithium-ion battery, relate in particular to a kind of apparatus and method of making lithium ion battery coiling gap.
Background technology
Along with the development of modern society, the mobile devices such as video camera, notebook computer, digital camera, portable DVD player and mobile phone have had more and more widely and to have used, and therefore, these mobile devices are also increasing to the demand as the battery of its power supply.And the advantage such as lithium ion battery has that energy density height, long service life, self discharge coefficient are little, size (length, width and thickness) flexible design and environmental protection has become the optimal power supply of mobile device.
Lithium ion battery has two kinds of production technologies: lamination process and winding process.Winding process is owing to have that production technology is simple, winding efficiency is high, self discharge is little and the security performance advantages of higher, adopted by most of lithium ion battery production firm.Adopt the lithium ion battery of winding process preparation to comprise pole piece group and the pack case with winding-structure.Wherein, as shown in Figure 1, the pole piece group by positive plate 21, negative plate 23 and be interval in positive plate 21 and negative plate 23 between barrier film 22 according to necessarily stacking sequential volume around forming.
But the pole piece group of this winding process preparation has closely winding-structure; Negative material sharply expands in charging process, and the both sides of negative plate are all fettered closely by adjacent positive plate; There are larger stress in this expansion and constraint so that battery core is inner, thereby have caused the distortion of battery.
The distortion of expanding and causing owing to negative pole in order to solve battery, we have been proposed in the solution of the manual carbon coating vinyl acetate in corner of pole piece, thereby between positive plate 21 and negative plate 23, make the coiling gap, when fluid injection in battery, ethylene carbonate is dissolved in the electrolyte, just reserve the expansion space to negative plate, thereby eliminated the internal stress of battery, solved the problem of battery distortion.But the method production efficiency is low, and coat position, shape, size and thickness control accuracy are poor, can't use in actual production.
In view of this, necessaryly provide a kind of and make the device in lithium ion battery coiling gap and use this device to make the method in lithium ion battery coiling gap, adopt this device and the method greatly to enhance productivity, and the position of the coat that obtains, shape, size and thickness can both be precisely controlled, the final problem on deformation that well solves battery.
Summary of the invention
One of purpose of the present invention is: for the deficiencies in the prior art, and provide a kind of device of making lithium ion battery coiling gap, adopt this device greatly to enhance productivity, and the position of the coat that obtains, shape, size and thickness can both be precisely controlled, the final problem on deformation that well solves battery.
In order to achieve the above object, the present invention adopts following technical scheme: a kind of device of making lithium ion battery coiling gap, comprise pole piece drive, barrier film drive and up-coiler, also comprise PLC controller, encoder, transducer and coating machine, described PLC controller is electrically connected with encoder, transducer and coating machine respectively, described encoder is connected with coating machine with described pole piece drive, barrier film drive, up-coiler respectively, and described coating machine is provided with application head and control system.
As a kind of improvement that the present invention makes the device in lithium ion battery coiling gap, directly over the pole piece before described application head is positioned at and reels.
As a kind of improvement that the present invention makes the device in lithium ion battery coiling gap, described application head is positioned at the outside of the corner of pole piece when reeling.
A kind of improvement as the present invention makes the device in lithium ion battery coiling gap is loaded with applicator in the described coating machine.
As a kind of improvement that the present invention makes the device in lithium ion battery coiling gap, described applicator is ethylene carbonate or dry ice.
With respect to prior art, the present invention utilizes the PLC controller, encoder, transducer and coating machine, collect the data such as the tape running speed of pole piece and tape transport displacement by encoder and transducer, and with data feedback to the PLC controller, the PLC controller is then controlled coating machine the corner of pole piece is applied, thereby realize the accurate coating to pole piece, the position of the coat that obtains, shape, size and thickness can both be precisely controlled, and adopt this device that pole piece is applied automatically, to replace manual coating of the prior art, can greatly enhance productivity.
Another object of the present invention is to provide a kind of method that adopts said apparatus to make lithium ion battery coiling gap, may further comprise the steps: the first step, the battery design parameter is manually inputted in the PLC controller, simultaneously shape and the size of coat are inputted in the control system of coating machine; Second step, PLC controller be according to the angle position of calculation of parameter pole piece of input, the beginning operating winding, and the PLC controller information of own coding device and transducer of collecting simultaneously, and calculate pole piece with respect to the tape transport displacement of lug; The 3rd step, when the corner of pole piece walk to bring to application head under or (comprise two kinds of situations here: for the pole piece before reeling, in the time of under its corner walks to bring to application head during the outside; And for the pole piece that is in the winding process, then be when application head is positioned at the corner of pole piece, preferably, the coating direction of application head is consistent with the Width of pole piece, make application head can be coated with the corner of full pole piece), the PLC controller sends instruction to coating machine, and application head begins to apply applicator according to predetermined shape and size, obtains coat.
As a kind of improvement that the present invention makes the method in lithium ion battery coiling gap, described pole piece comprises positive plate and negative plate.
As a kind of improvement that the present invention makes the method in lithium ion battery coiling gap, the described battery design parameter of the first step be lug from the first corner apart from a, negative plate thickness t
1, the positive plate thickness t
2, membrane thicknesses t
3, battery core width b and coat thickness c.
As a kind of improvement that the present invention makes the method in lithium ion battery coiling gap, described PLC controller calculates angle position according to following design conditions and formula: the first angle position a
1=a; The 2nd angle position a
2=a
1+ b+ (t
1+ t
2+ 2*t
3+ c); N angle position a
n=(a
1+ a
2+ ...+a
N-1)+(a
n-1)+(t
1+ t
2+ 2*t
3+ c).
As a kind of improvement that the present invention makes the method in lithium ion battery coiling gap, the thickness of described coat is 10 ~ 500um.
With respect to prior art, method of the present invention adopts the PLC controller to calculate the angle position of pole piece, adopt the shape of coating machine control coat, thickness and size, and the data such as the tape running speed of employing encoder and transducer collection pole piece and tape transport displacement, and with data feedback to the PLC controller, the PLC controller is then controlled coating machine the corner of pole piece is applied, thereby realize the accurate coating to pole piece, the position of the coat that obtains, shape, size and thickness can both be precisely controlled, and adopt the method that pole piece is applied automatically, to replace manual coating of the prior art, can greatly enhance productivity.
In a word, the present invention is by accurately locating and accurately applying, in the situation that guarantees battery performance, made efficiently the coiling gap, negative pole when this gap charges for battery expands provides the space, has discharged the battery core internal stress, thereby has effectively solved the problem on deformation of battery.
Description of drawings
Below in conjunction with specification drawings and specific embodiments, invention and useful technique effect thereof are elaborated.
Fig. 1 is the rotation angle position structural representation of the pole piece group of prior art winding process preparation.
Fig. 2 is a kind of structural representation that the present invention makes the device in lithium ion battery coiling gap.
Fig. 3 is the another kind of structural representation that the present invention makes the device in lithium ion battery coiling gap.
Fig. 4 is the rotation angle position structural representation of the pole piece group of employing method preparation of the present invention.
Fig. 5 is the rotation angle position structural representation after the pole piece group of employing method preparation of the present invention is assembled into battery.
Embodiment
The invention provides a kind of device of making lithium ion battery coiling gap.
Embodiment 1: see also Fig. 2, the device in the manufacturing lithium ion battery coiling gap that present embodiment provides, comprise pole piece drive 1, barrier film drive 2 and up-coiler 3, also comprise PLC controller 4, encoder 5, transducer 6 and coating machine 7, PLC controller 4 is electrically connected with encoder 5, transducer 6 and coating machine 7 respectively, encoder 5 is connected with coating machine with pole piece drive 1, barrier film drive 2, up-coiler 3 respectively and is connected, and coating machine 7 is provided with application head 8 and control system.Wherein, encoder 5 is high-precision encoder 5.
Wherein, directly over the pole piece before application head 8 is positioned at and reels.Be loaded with applicator in the coating machine 7.Applicator is ethylene carbonate or dry ice.Wherein, ethylene carbonate itself is exactly a kind of constituent in the used in battery electrolyte, it at room temperature just can be solidified into solid-state, and when being placed on the electrode group of winding in the packaging bag and after injecting electrolyte, ethylene carbonate can dissolve in the electrolyte, therefore can not impact battery fully, can also form gap (as shown in Figure 5) simultaneously between positive plate 11 and negative plate 12, to hold the expansion of negative pole, solve the problem on deformation of battery.And dry ice distils easily, when battery changes into, behind the aerogenesis, degasification, the gas that dry ice sublimation becomes will be discharged from, thereby forms gap (as shown in Figure 5) between positive plate 11 and negative plate 12, to hold the expansion of negative pole, solves the problem on deformation of battery.
Embodiment 2: see also Fig. 3, the device in the manufacturing lithium ion battery coiling gap that present embodiment provides, comprise pole piece drive 1, barrier film drive 2 and up-coiler 3, also comprise PLC controller 4, encoder 5, transducer 6 and coating machine 7, PLC controller 4 is electrically connected with encoder 5, transducer 6 and coating machine 7 respectively, encoder 5 is connected with coating machine with pole piece drive 1, barrier film drive 2, up-coiler 3 respectively and is connected, and coating machine 7 is provided with application head 8 and control system.Wherein, encoder 5 is high-precision encoder 5.
Wherein, application head 8 is positioned at the side of the corner of the pole piece when reeling.Be loaded with applicator in the coating machine 7.Applicator is ethylene carbonate or dry ice.
The present invention also provides a kind of method of making lithium ion battery coiling gap.
Embodiment 1: the first step, with lug from the first corner apart from a, negative plate thickness t
1, the positive plate thickness t
2, membrane thicknesses t
3, the battery design parameters such as battery core width b and coat 14 thickness c manually input in the PLC controller 4, in the control system with the shape of coat 14 and size input coating machine 7, wherein, coat 14 thickness c are 10 ~ 500um simultaneously.
Second step, PLC controller 4 calculates angle position according to the parameter of input according to following design conditions and formula: the first angle position a
1=a; The 2nd angle position a
2=a
1+ b+ (t
1+ t
2+ 2*t
3+ c); N angle position a
n=(a
1+ a
2+ ...+a
N-1)+(a
n-1)+(t
1+ t
2+ 2*t
3+ c).Start pole piece drive 1, barrier film drive 2 and up-coiler 3, the beginning operating winding, PLC controller 4 information of own coding device 5 and transducer 6 of collecting simultaneously, and calculate pole piece with respect to the tape transport displacement of lug.
The 3rd step, when the corner of pole piece walk to bring to application head 8 under (as shown in Figure 2, certainly, if application head 8 and transducer 6 be not when co-located, the distance that needs compensation application head 8 and transducer 6) time, PLC controller 4 sends instruction to coating machine 7, and application head 8 beginnings apply applicator according to predetermined shape and size, obtain coat 14.Encoder 5 gathers the velocity information of pole piece drive 1, barrier film drive 2 and up-coiler 3 simultaneously, the collect information of own coding device 5 of 7 of coating machines, and the real-time tape running speed of calculating pole piece, coating machine 7 is regulated coating speed and applicator flow according to this speed, thereby guarantee that pole piece coat 14 in non-at the uniform velocity tape transport situation also has consistent shape, size and thickness, to reach high-precision control.Along with the carrying out of tape transport and the operation of up-coiler 3, positive plate 11, negative plate 12 and barrier film 13 are wound into the pole piece group, and the rotation angle position structural representation of the pole piece group of preparation as shown in Figure 4.The coating method of coating machine 7 can be that the modes such as glue, inkjet printing, transfer coated or extrusion coated are dripped in air spraying, brushing, air pressure.
When applicator is ethylene carbonate, ethylene carbonate at room temperature just can solidify soon, and because ethylene carbonate itself is exactly a kind of constituent in the used in battery electrolyte, when being placed on the electrode group of winding in the packaging bag and after injecting electrolyte, ethylene carbonate can dissolve in the electrolyte, therefore can not impact battery fully, simultaneously can also between positive plate 11 and negative plate 12, form gap (as shown in Figure 5), to hold the expansion of negative pole, solve the problem on deformation of battery.And dry ice distils easily, when battery changes into, behind the aerogenesis, degasification, the gas that dry ice sublimation becomes will be discharged from, thereby forms gap (as shown in Figure 5) between positive plate 11 and negative plate 12, to hold the expansion of negative pole, solves the problem on deformation of battery.
Need to prove that coat 14 can be arranged at each corner of pole piece continuously, also can be that the gap is coated on some corner of pole piece at random.
Method of the present invention is according to battery core design parameter accurate Calculation pole piece corner, thereby and guaranteed the accuracy of coat 14 spraying positions by the tape transport displacement of high-precision encoder 5 accurate Calculation pole pieces; In addition, coating machine 7 is collected the signal of high-precision encoder 5 and is calculated the real-time tape running speed of pole piece, automatically regulates accordingly spray parameters, thereby has guaranteed the consistency of shape, size and the thickness of coat 14.In addition, this method is carried out spray treatment to pole piece in the pole piece tape transport, does not delay the operating winding of pole piece, thereby has guaranteed production efficiency.Coat 14 can be dissolved in the electrolyte or after changing into degasification after fluid injection and remove, thereby at positive plate 11 and negative plate 12 leaving gaps, negative pole when charging for battery expands provides the space, with release battery core internal stress, thereby has effectively solved the battery problem on deformation.
Embodiment 2: the applicator of present embodiment is take ethylene carbonate as example, in the enough situation in the space, volume pin place of up-coiler 3, also can (volume pin place) carry out the coating of applicator when reeling.See also Fig. 3, present embodiment may further comprise the steps: the first step, with lug from the first corner apart from a, negative plate thickness t
1, the positive plate thickness t
2, membrane thicknesses t
3, the battery design parameters such as battery core width b and coat 14 thickness c manually input in the PLC controller 4, in the control system with the shape of coat 14 and size input coating machine 7, wherein, coat 14 thickness c are 10 ~ 500um simultaneously.
Second step, PLC controller 4 calculates angle position according to the parameter of input according to following design conditions and formula:
The first angle position a
1=a; The 2nd angle position a
2=a
1+ b+ (t
1+ t
2+ 2*t
3+ c); N angle position a
n=(a
1+ a
2+ ...+a
N-1)+(a
n-1)+(t
1+ t
2+ 2*t
3+ c).Start pole piece drive 1, barrier film drive 2 and up-coiler 3, the beginning operating winding.
The 3rd step, encoder 5 gathers pole piece drive 1, the speed data of barrier film drive 2 and up-coiler 3, the collect information of own coding device 5 of 7 of coating machines, by transducer 6 and encoder 5 pole piece is sent to PLC controller 4 with respect to the rotation information of walking information and up-coiler 3 of lug, when the corner of up-coiler 3 just forwards application head 8 position to, PLC controller 4 sends instruction to coating machine 7, application head 8 applies applicator to the battery core corner, coating machine 7 information of own coding device 5 of collecting simultaneously, and the real-time tape running speed of calculating pole piece, coating machine 7 is regulated coating speed and applicator flow according to this speed, thereby guarantee that pole piece coat 14 in non-at the uniform velocity tape transport situation has consistent shape, size and thickness, ethylene carbonate (EC) coat 14 solidifies rapidly and is involved in subsequently, thereby EC props up outer field pole piece come (as shown in Figure 4) between positive plate 1 and negative plate 2 as the filler pad, along with the carrying out of reeling, positive plate 11, negative plate 12 and the barrier film 13 last pole piece groups that form.EC is dissolved in the electrolyte after the fluid injection, thereby has made coiling gap (as shown in Figure 5), and the negative pole when charging for battery expands provides the space, with release battery core internal stress, thereby has effectively solved the battery problem on deformation.Therefore the method in lithium ion battery manufacturing coiling of the present invention gap also can (volume pin place) be carried out when reeling.
Need to prove, although this specification only describes the applicator in the present invention's design as an example of EC and dry ice example, but those skilled in the art is according to the announcement of this specification, also can adopt other materials (distil, decompose, be dissolve or swell in electrolyte, and do not affect the material of battery performance).In addition, do not get rid of and adopt similar method that barrier film is carried out coating processing, make the method that the coiling gap solves distortion.
The according to the above description announcement of book and instruction, those skilled in the art in the invention can also carry out suitable change and modification to above-mentioned execution mode.Therefore, the embodiment that discloses and describe above the present invention is not limited to also should fall in the protection range of claim of the present invention modifications and changes more of the present invention.In addition, although used some specific terms in this specification, these terms do not consist of any restriction to the present invention just for convenience of description.
Claims (10)
1. device of making lithium ion battery coiling gap, comprise pole piece drive, barrier film drive and up-coiler, it is characterized in that: also comprise PLC controller, encoder, transducer and coating machine, described PLC controller is electrically connected with encoder, transducer and coating machine respectively, described encoder is connected with coating machine with described pole piece drive, barrier film drive, up-coiler respectively, and described coating machine is provided with application head and control system.
2. the device in manufacturing lithium ion battery coiling according to claim 1 gap is characterized in that: described application head be positioned at pole piece before reeling directly over.
3. the device in manufacturing lithium ion battery coiling according to claim 1 gap, it is characterized in that: described application head is positioned at the outside of the corner of pole piece when reeling.
4. the device in manufacturing lithium ion battery coiling according to claim 1 gap is characterized in that: be loaded with applicator in the described coating machine.
5. the device in manufacturing lithium ion battery coiling according to claim 4 gap, it is characterized in that: described applicator is ethylene carbonate or dry ice.
6. one kind is adopted each device of claim 1 to 5 to make the method in lithium ion battery coiling gap, it is characterized in that, may further comprise the steps:
The first step is manually inputted the battery design parameter in the PLC controller, simultaneously shape and the size of coat is inputted in the control system of coating machine;
Second step, PLC controller be according to the angle position of calculation of parameter pole piece of input, the beginning operating winding, and the PLC controller information of own coding device and transducer of collecting simultaneously, and calculate pole piece with respect to the tape transport displacement of lug;
The 3rd step, when the corner of pole piece walk to bring to application head under or during the outside, the PLC controller sends instruction to coating machine, application head begins to apply applicator according to predetermined shape and size, obtains coat.
7. the method in manufacturing lithium ion battery coiling according to claim 6 gap, it is characterized in that: described pole piece comprises positive plate and negative plate.
8. the method in manufacturing lithium ion battery coiling according to claim 7 gap is characterized in that: the described battery design parameter of the first step be lug from the first corner apart from a, negative plate thickness t
1, the positive plate thickness t
2, membrane thicknesses t
3, battery core width b and coat thickness c.
9. the method in manufacturing lithium ion battery coiling according to claim 8 gap, it is characterized in that: described PLC controller calculates angle position according to following design conditions and formula:
The first angle position a
1=a;
The 2nd angle position a
2=a
1+ b+ (t
1+ t
2+ 2*t
3+ c);
N angle position a
n=(a
1+ a
2+ ...+a
N-1)+(a
n-1)+(t
1+ t
2+ 2*t
3+ c).
10. the method in manufacturing lithium ion battery coiling according to claim 6 gap, it is characterized in that: the thickness of described coat is 10 ~ 500um.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210353269.9A CN102903960B (en) | 2012-09-21 | 2012-09-21 | A kind of apparatus and method of manufacturing lithium ion battery coiling gap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210353269.9A CN102903960B (en) | 2012-09-21 | 2012-09-21 | A kind of apparatus and method of manufacturing lithium ion battery coiling gap |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102903960A true CN102903960A (en) | 2013-01-30 |
| CN102903960B CN102903960B (en) | 2016-05-18 |
Family
ID=47576099
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|---|---|---|---|
| CN201210353269.9A Active CN102903960B (en) | 2012-09-21 | 2012-09-21 | A kind of apparatus and method of manufacturing lithium ion battery coiling gap |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107394097A (en) * | 2017-07-14 | 2017-11-24 | 江苏春兰清洁能源研究院有限公司 | A kind of pinpoint method in multi pole ears winding type lithium ion battery pole ear position |
| CN112913047A (en) * | 2018-10-24 | 2021-06-04 | 武藏能源解决方案有限公司 | Electrode manufacturing apparatus and electrode manufacturing method |
| CN113381080A (en) * | 2021-06-15 | 2021-09-10 | 广东国光电子有限公司 | Manufacturing method of battery roll core and battery roll core |
| WO2022252774A1 (en) * | 2021-06-01 | 2022-12-08 | 江苏时代新能源科技有限公司 | Cell fabrication device and method, battery, and electrical apparatus |
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| CN107394097A (en) * | 2017-07-14 | 2017-11-24 | 江苏春兰清洁能源研究院有限公司 | A kind of pinpoint method in multi pole ears winding type lithium ion battery pole ear position |
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| CN113381080B (en) * | 2021-06-15 | 2022-06-10 | 广东国光电子有限公司 | Manufacturing method of battery roll core and battery roll core |
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| CN102903960B (en) | 2016-05-18 |
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