CN102122728A - Method for winding cylindrical lithium-iron disulfide battery core - Google Patents
Method for winding cylindrical lithium-iron disulfide battery core Download PDFInfo
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- CN102122728A CN102122728A CN2011100312847A CN201110031284A CN102122728A CN 102122728 A CN102122728 A CN 102122728A CN 2011100312847 A CN2011100312847 A CN 2011100312847A CN 201110031284 A CN201110031284 A CN 201110031284A CN 102122728 A CN102122728 A CN 102122728A
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Abstract
The invention provides a method for winding a cylindrical lithium-iron disulfide battery core, comprising the steps of: putting a double-layer diaphragm into a winding pin, wherein a cathode structure is clamped between the double-layer diaphragm, the one end without a cathode lug of the cathode structure serves as a winding beginning end of the cathode structure and the beginning end of the cathode structure is located behind the beginning end of the double-layer diaphragm; pre-winding the double-layer diaphragm; placing an anode structure at the innermost side of the double-layer diaphragm and winding the anode structure and the double-layer diaphragm together, wherein the one end without an anode lug of the anode structure serves as a winding beginning end of the anode structure and the beginning end of the cathode structure is located behind the anode lug; winding the cathode structure and the anode structure as well as the double-layer diaphragm together; and successively winding the anode structure and the cathode structure, wherein the tail end of the anode structure is located in front of the cathode lug and the winding of the double-layer diaphragm is not completed prior to that of the cathode structure. By means of the method, an internal short circuit caused by piercing the diaphragm by the anode and cathode lugs can be avoided and the damage of the battery can be prevented.
Description
Technical field
The present invention relates to technical field of chemical power, particularly a kind of electric core winding method that is used for cylindrical battery of lithium-iron disulphide.
Background technology
Battery of lithium-iron disulphide is owing to have energy density height, voltage height, in light weight, advantage such as self discharge is little, operating temperature range is wide, the life-span is long, being the ideal source of electronic installation miniaturization ands such as video camera, mobile phone, notebook computer machine Portable Measurement Instrument, also is the first-selected power supply of the light-duty high-energy power battery of following used for electric vehicle.
At present, the electric core that cylindrical battery of lithium-iron disulphide both domestic and external manufacturer produces is generally convoluted lithium battery, the manufacturing process of this electricity core is as follows: at first, positive active material is coated on the anodal conductive base, then positive pole is dried, roll-in, cut to handle and obtain anode pole piece; Then, select the lithium metal of specific dimensions or its to close ribbon of gold foil as cathode pole piece; Then, positive pole ear is connected on the anode pole piece to form positive electrode structure, negative lug is connected on the cathode pole piece to form negative pole structure; At last, send into winding apparatus after the top alignment with positive electrode structure, negative pole structure and double-deck barrier film, form electric core to reel.
Yet positive pole ear and negative lug are generally the rectangle laminated structure of being made by metal material.Because hardness of metal materials is bigger, the edge of its rectangle sheet is easy to pierce through barrier film, and the also perverse probably barrier film of wearing of burr that produces when positive pole ear and negative lug are soldered to anode pole piece and cathode pole piece, barrier film is pierced positive electrode structure and the negative pole structure conducting that is positioned at make in the barrier film both sides, causes internal short-circuit of battery.Internal short-circuit of battery can damage battery, causes battery to use, and also may produce danger when serious.
Therefore, need a kind of electric core winding method that is used for cylindrical battery of lithium-iron disulphide, to address the above problem.
Summary of the invention
Introduced the notion of a series of reduced forms in the summary of the invention part, this will further describe in the embodiment part.Summary of the invention part of the present invention does not also mean that key feature and the essential features that will attempt to limit technical scheme required for protection, does not more mean that the protection range of attempting to determine technical scheme required for protection.
In order to solve prior art problems, the invention provides a kind of electric core winding method that is used for cylindrical battery of lithium-iron disulphide, described electric core comprises positive electrode structure, negative pole structure and be clipped in barrier film between described positive electrode structure and the described negative pole structure, described positive electrode structure comprises anode pole piece and is arranged on the positive pole ear of described anode pole piece one end, described negative pole structure comprises cathode pole piece and is arranged on the negative lug of described cathode pole piece one end, described method comprises: a) the described barrier film of bilayer is sent into the volume pin, accompany described negative pole structure between the double-deck described barrier film, the top that an end that is not provided with described negative lug of described negative pole structure is reeled as described negative pole structure, and the top of described negative pole structure is positioned at after the top of double-deck described barrier film; B) the described barrier film of bilayer is carried out pre-wound; C) described positive electrode structure is placed on the most inboard of double-deck described barrier film, and described positive electrode structure is reeled with the described barrier film of bilayer, the top that an end that is provided with described positive pole ear of described positive electrode structure is reeled as described positive electrode structure, the top of described negative pole structure is positioned at after the described positive pole ear; D) described negative pole structure is reeled with described positive electrode structure and double-deck described barrier film; E) make described positive electrode structure, described negative pole structure finish coiling successively, wherein, the end of described positive electrode structure is positioned at before the described negative lug, and double-deck described barrier film is not finished coiling prior to described negative pole structure.
Preferably, the distance between the top of the top of described negative pole structure and double-deck described barrier film is no less than 20mm.
Preferably, the pre-wound size of double-deck described barrier film is no less than 10mm.
Preferably, the pre-wound of double-deck described barrier film is of a size of 22-30mm.
Preferably, the pre-wound of double-deck described barrier film is of a size of 10-15mm.
Preferably, described c) positive electrode structure described in the step is with the described barrier film of the bilayer predetermined length of reeling, and described predetermined length is 10-20mm.
Preferably, described predetermined length is 12-15mm.
Preferably, described predetermined length is 10-12mm.
Preferably, after described positive electrode structure was reeled end, negative pole structure continued to reel, so that described negative pole structure wraps up described positive electrode structure fully.
Preferably, described negative pole structure is finished coiling prior to the described barrier film of bilayer.
Preferably, after described negative pole structure was reeled end, double-deck described barrier film continued coiling 1-3 circle.
Preferably, described method also is included in to reel and finishes double-deck described barrier film is clung in the back with adhesive plaster end.
Preferably, described b) step also is included in after described pre-wound finishes, and applies tension force at the end of the described barrier film of bilayer.
The present invention also provides a kind of electric core that is used for cylindrical battery of lithium-iron disulphide, and described electric core adopts aforesaid electric core winding method to make.
The present invention also carries a kind of cylindrical battery of lithium-iron disulphide, and described cylindrical battery of lithium-iron disulphide comprises aforesaid electric core.
Employing can avoid effectively according to electric core winding method of the present invention because near the barrier film positive pole ear and/or the negative lug is pierced positive electrode structure that is positioned at the barrier film both sides and the negative pole structure conducting that causes, cause internal short-circuit, can prevent that therefore battery from damaging, improving the useful life and the yields of battery.In addition, adopt the discharge performance of the battery of lithium-iron disulphide for preparing according to electric core winding method of the present invention superior.
Description of drawings
Following accompanying drawing of the present invention is used to understand the present invention at this as a part of the present invention.Embodiments of the invention and description thereof have been shown in the accompanying drawing, have been used for explaining principle of the present invention.In the accompanying drawings,
Fig. 1 is the schematic diagram of volume pin;
Fig. 2 is the flow chart according to electric core winding method of the present invention;
Fig. 3 A is the schematic diagram according to the phase I in the electric core winding flow process of one aspect of the invention;
Fig. 3 B is the schematic diagram according to second stage in the electric core winding flow process of one aspect of the invention;
Fig. 3 C is the schematic diagram according to the phase III in the electric core winding flow process of one aspect of the invention;
Fig. 4 is the schematic diagram according to the electric core winding method of a preferred embodiment of the invention.
Embodiment
In the following description, a large amount of concrete details have been provided so that more thorough understanding of the invention is provided.Yet, it will be apparent to one skilled in the art that the present invention can need not one or more these details and implemented.In other example,, be not described for technical characterictics more well known in the art for fear of obscuring with the present invention.
According to the electric core winding method that is used for cylindrical battery of lithium-iron disulphide of the present invention, introduce volume pin of the present invention here earlier for convenience of description, the volume pin is one of most important parts in the winding apparatus.
Fig. 1 is the schematic diagram of volume pin.As shown in Figure 1, volume pin 100 comprises columned main body 101 and shank 102, and wherein an end of main body 101 is fixed on the shank 102.Main body 101 is provided with the slit of axially running through entire body 101 103 along main body 101, and slit 103 is with main body 101 separated into two parts 101a and 101b.The size in slit 103 narrows down gradually from an end to the end near shank 102 away from shank 102, that is to say that slit 103 is narrower at the end near shank 102, and at the end broad away from shank 102.Slit 103 mainly is to be used for reeling beginning as charging aperture, with the fixed electrode material, and after electric core winding is finished the electric core of winding is removed from volume pin 101.The main body 101 of volume pin 100 can be formed by high duty metal or alloy material, for example, alloy material can be molybdenum-zinc-magnesium-copper-zircaloy, zinc-magnesium-copper-zircaloy, chromium-zirconium-cobalt alloy, chromium-zirconium-cobalt-ferroalloy, chromium-zirconium-cobalt-titanium alloy, chromium-zirconium-cobalt-iron-titanium alloy etc.The diameter of main body 101 can be 1.5-4.5mm.
Below in conjunction with Fig. 2,3A-3C and Fig. 4 electric core winding method of the present invention is described.The electricity core comprises positive electrode structure, negative pole structure and is clipped in barrier film between positive electrode structure and the negative pole structure.Wherein, the manufacture method of positive electrode structure and negative pole structure can be this area method commonly used, for example, applies by FeS on metal forming
2, the positive active material formed of electric conducting material and binding agent, and through oven dry, roll-in, cut to handle and obtain anode pole piece, and an end that positive pole ear is connected to anode pole piece is to form positive electrode structure.As cathode pole piece, and an end that negative lug is connected to cathode pole piece is to form negative pole structure with lithium metal.With high-purity PE film or PE/PP composite membrane as barrier film.
Fig. 2 is the flow chart according to electric core winding method of the present invention.
In step 201, double-deck barrier film is sent into the volume pin, accompany negative pole structure between the double-deck barrier film, the top that an end that is not provided with negative lug of negative pole structure is reeled as negative pole structure, and the top of negative pole structure is positioned at after the top of double-deck barrier film.In practical operation, the volume pin is fixed, two-layer barrier film moves, and two-layer barrier film is fixed, and the volume pin moves finishes coiling.Preferably, the distance between the top of negative pole structure and the top of double-deck barrier film is no less than 20mm, finishes after the pre-wound to guarantee double-deck barrier film, and the top of negative pole structure does not begin to reel yet.Adopting the advanced method of double-deck barrier film, mainly is that tensile strength height and material are thin because the pliability of PP barrier film or PP/PE barrier film is good, therefore can control the coiling pulling force by double-deck barrier film.Clamp the easy deformation negative pole structure in the middle of the double-deck barrier film, can the anticathode structure play location and protective effect.Therefore in addition, compare with the mode of other coiling battery battery core, negative pole structure of the present invention need not to fix with adhesive tape sticking, has simplified processing step, has eliminated when battery operated adhesive tape to the influence of electric core.
In step 202, double-deck barrier film is carried out pre-wound.After an end of double-deck barrier film enters the slit of rolling up on the pin, only double-deck barrier film is carried out pre-wound earlier, and the pre-wound size must not be less than 10mm.Concrete pre-wound size can be selected according to the battery size and the producer's needs.Be understandable that the pre-wound size is unsuitable long, on the one hand, the long meeting of pre-wound size causes the waste of diaphragm material, increases cost; On the other hand, because the finite capacity of battery steel shell, the pre-wound size is long can to increase its occupied volume, reduces the content of active principle, and then influences battery capacity.For instance, when coiling obtained the electric core of AA type battery, the pre-wound size of double-deck barrier film can be 22-30mm.When coiling obtained the electric core of AAA type battery, the pre-wound size of double-deck barrier film can be 10-15mm.Owing to when subsequently double-deck barrier film being reeled, need make double-deck barrier film tensioning, therefore, earlier double-deck barrier film be carried out pre-wound in order not allow double-deck barrier film come off from the volume pin.Preferably, after pre-wound finishes, apply tension force at the end of double-deck barrier film, so that the coiling of electric core.
Fig. 3 A is the schematic diagram according to the phase I in the electric core winding flow process of one aspect of the invention.As shown in Figure 3, make an end of double-deck barrier film 302 enter the slit of rolling up on the pin 301,, play location and protective effect with anticathode structure 303 at double-deck barrier film 302 sandwich negative pole structures 303.For negative pole structure 303 entirely being clamped between the double-deck barrier film 302, can before entering volume pin 301, double-deck barrier film 302 finish described clamping step.After pre-wound is finished, apply tension force at the end of double-deck barrier film 302, the direction among Fig. 3 shown in the arrow A is the direction that applies tension force.
In step 203, positive electrode structure is placed on the most inboard of double-deck barrier film, and positive electrode structure is reeled with double-deck barrier film, and the top that an end that is provided with positive pole ear of positive electrode structure is reeled as positive electrode structure, the top of negative pole structure is positioned at after the positive pole ear.Described double-deck barrier film the most inboard is near a side of volume pin in the both sides of double-deck barrier film in the winding process.Because positive pole ear is made by metal material, and is fine strip shape, and the material of barrier film and anode pole piece is softer, therefore, the positive pole ear that is positioned at top can be so that be wound into cylindricly at first, and after coiling was finished, the core of electric core still kept original shape.The top of negative pole structure is positioned at after the positive pole ear, can avoid adding the top of positive electrode structure and positive pole ear when being soldered to anode pole piece because of positive pole ear, produce positive electrode structure out-of-flatness, even the burr that produces may cause internal short-circuit of battery by the perverse barrier film of wearing when the welding positive pole ear.Positive electrode structure is with the double-deck barrier film predetermined length of reeling, and wherein, described predetermined length can be 10-20mm, and the producer can select predetermined length according to the different model of battery.For instance, when coiling obtained the electric core of AA type battery, this predetermined length can be 12-15mm.When coiling obtained the electric core of AAA type battery, this predetermined length can be 10-12mm.
Fig. 3 B is the schematic diagram according to second stage in the electric core winding flow process of one aspect of the invention.Shown in Fig. 3 B, the top of positive electrode structure 305 begins to reel prior to the top of negative pole structure 303, and positive electrode structure 305 is introduced into volume pin 301, pierces through double-deck barrier film 302 to prevent the positive pole ear 306 that is arranged on positive electrode structure 305 tops, causes internal short-circuit of battery.After positive electrode structure 305 was wound up into predetermined length, negative pole structure 303 began to reel under double-deck barrier film 302 is carried secretly.
In step 204, make the top of negative pole structure enter the position of reeling, and negative pole structure is reeled with positive electrode structure and double-deck barrier film.Behind positive electrode structure coiling predetermined length, negative pole structure enters the position of reeling under the protection of double-deck barrier film begins to reel.
In step 205, make positive electrode structure, negative pole structure finish coiling successively, wherein, described negative pole structure comprises cathode pole piece and is arranged on the negative lug of the end of this cathode pole piece, the end of positive electrode structure is positioned at before the negative lug, and double-deck barrier film is not finished coiling prior to negative pole structure.
Preferably, after positive electrode structure was reeled end, negative pole structure continued to reel, so that negative pole structure wraps up positive electrode structure fully.Cao Zuo main purpose is like this: allow the anodal structural positive active material of outermost layer that electrochemical reaction can fully take place, to improve the utilance of positive active material; Because cathode pole piece is made by lithium metal, negative pole structure wraps up positive electrode structure fully can prevent that cathode pole piece is consumed and is connected with the negative lug disconnection in the battery use, causes battery unavailable; Because the outmost turns of negative pole structure is welded with negative lug, negative lug may produce the negative pole structure surface irregularity after being soldered to negative pole structure, even burr, positive electrode structure has been reeled prior to negative pole structure can prevent from perversely to wear double-deck barrier film and cause internal short-circuit of battery; Because of battery steel shell is external negative pole, outmost turns is that negative pole can be avoided negative lug to stab out double-deck barrier film like this and is electrically connected with battery steel shell, causes internal short-circuit of battery after electric core is packed battery steel shell into.More preferably, negative pole structure continues coiling 1 circle after positive electrode structure is reeled end, is wrapped up by the multilayer negative pole structure to avoid positive electrode structure, and then prevents to cause the waste of negative pole structure.
Preferably, negative pole structure is finished coiling prior to double-deck barrier film.More preferably, make double-deck barrier film continue coiling 1-3 circle after negative pole structure is reeled and finished.Preferably, cling double-deck barrier film end in the end back of reeling with adhesive plaster, to form electric core.After the positive and negative electrode structure was reeled electric core fully, double-deck barrier film continued coiling 1-40mm according to the battery sizes needs.For instance, when coiling obtained the electric core of AA type battery, the length that double-deck barrier film continues to reel can be 7-20mm.When coiling obtained the electric core of AAA type battery, the length that double-deck barrier film continues to reel can be 5-20mm.
Fig. 3 C is for being in the schematic diagram of phase III according to the electric core winding flow process of one aspect of the invention.Shown in Fig. 3 C, when winding process closes to an end, the remainder of positive electrode structure 305, negative pole structure 303 and double-deck barrier film 302 is: the residue length of positive electrode structure 305 is the shortest, and the residue length of double-deck barrier film 302 is the longest, and the residue length of negative pole structure 303 is placed in the middle.The part that negative pole structure 303 grows than positive electrode structure 305 will make the end back negative pole structure 303 of reeling can wrap up positive electrode structure 305 fully.The part that double-deck barrier film 302 grows than negative pole structure 303 will make double-deck barrier film 302 after negative pole structure 303 finishes to reel, and can continue coiling 1-3 circle around volume pin 301.
In step 206, after electric core winding is finished, will roll up pin along the main body of volume pin to the direction of shank and from electric core, extract out.Because the slit on the volume pin of the present invention is wide outside and narrow inside, therefore, can need not other step and just can extract out along the direction shown in the arrow B among Fig. 3 C, the electric core that making reels finishes breaks away from volume pin 301.
The top and the terminal order that enters the volume pin of positive electrode structure, negative pole structure and double-deck barrier film will be described below.Fig. 4 is the schematic diagram according to the electric core winding method of a preferred embodiment of the invention.As shown in Figure 4, two-layer barrier film 402 and the negative pole structure 403 carried secretly are between the two sent into the volume pin, positive electrode structure 405 is arranged in the side of the both sides of the double-deck barrier film 402 of winding process near the volume pin.Should be noted in the discussion above that double-deck barrier film is introduced into the volume pin and carries out pre-wound, the top positive electrode structure 405 that has a positive pole ear 406 enters the volume pin then, and last negative pole structure 403 enters the volume pin under the protection of double-deck barrier film 402.Reel when finishing, positive electrode structure is finished coiling at first, then is that the negative pole structure 403 that end has a negative lug 404 is finished coiling, and what finish coiling at last is double-deck barrier film, and finishes the back and cling double-deck barrier film end with adhesive plaster reeling, to form electric core.
The present invention also provides a kind of electric core that is used for cylindrical battery of lithium-iron disulphide, and this electricity core is to adopt in the above-mentioned electric core winding method any one to make.
The present invention also provides a kind of cylindrical battery of lithium-iron disulphide, the above-mentioned electric core of this cylindrical battery of lithium-iron disulphide.
Preparation example 1
With FeS
2Powder is made positive active material with stirring after conductive agent, adhesive glue are mixed, and this positive active material is coated on the anode pole piece, then anode pole piece is dried, roll-in, cut processing, obtaining length is 285mm, width is 41mm, thickness is 0.17-0.19mm, and quality is the anode pole piece of 6.2-6.5g.With length is 310mm, and width is 39mm, and thickness is 0.15-0.17mm, and quality is that the paper tinsel band of pure metal lithium of 0.9-1.0g is as cathode pole piece.Then, end with positive pole ear and negative lug is connected to positive electrode structure of formation and negative pole structure on anode pole piece and the cathode pole piece respectively, adopt method of the present invention that positive electrode structure, negative pole structure and double-deck barrier film (Celgard2400 barrier film) are wound on again and form electric core together, wherein, the coiling number of turns is the 11.5-12 circle, and effective contact area of positive electrode structure and negative pole structure is 225-230cm
2Then, positive pole ear and negative lug are connected respectively to anodal loam cake assembly and battery steel shell.At last, electric core is put into battery steel shell, inject organic electrolyte, the pre-arcing of carrying out after sealing, cleaning to a certain degree obtains AA type battery of lithium-iron disulphide.
Preparation example 2
Adopt the method identical to prepare AAA type battery of lithium-iron disulphide with preparation example 1.Difference is: the length of anode pole piece is 140mm, and width is 36mm, and thickness is 0.17-0.19mm, and quality is 2.65-3.0g.The length of cathode pole piece is 160mm, and width is 34mm, and thickness is 0.15-0.17mm, and quality is 0.6-0.65g.The coiling number of turns is the 7-7.5 circle, and effective contact area of positive electrode structure and negative pole structure is 95-105cm
2
Preparation example 1 and the parameter that preparation example 2 is adopted see Table 1.
Table 1
| ? | The AA type | The AAA type |
| Anode pole piece weight/gram | 6.2-6.5 | 2.65-3.0 |
| Cathode pole piece weight/gram | 0.9-1.0 | 0.6-0.65 |
| Anode pole piece size/mm 2 | 285×41 | 140×36 |
| Cathode pole piece size/mm 2 | 310×39 | 160×34 |
| Anode pole piece thickness/mm | 0.17-0.19 | 0.17-0.19 |
| Cathode pole piece thickness/mm | 0.15-0.17 | 0.15-0.17 |
| Effective contact area/the cm of both positive and negative polarity pole piece 2 | 225-230 | 95-105 |
| The coiling number of turns | 11.5-12 | 7-7.5 |
| Average cell internal resistance/m Ω | 110 | 210 |
AA type battery of lithium-iron disulphide and existing AA type battery of lithium-iron disulphide to preparation example 1 preparation carries out the discharge performance test respectively.The photoflash lamp of the main simulation of this discharge performance test digital camera uses and the photo projection, its test process is as follows: at first with 1.5 watts discharge power discharge 2 seconds (the simulation photoflash lamp uses), discharge 28 seconds (the simulation photo is pressed the fast processing and the storage of photo behind the door) with 0.65 watt discharge power then, so just finish discharge cycles one time.Repeat this discharge cycles 10 times (promptly continuing discharge in 5 minutes, dormancy 55 minutes) in 1 hour continuously, till discharge voltage drops to 1.05V.The AA type battery of lithium-iron disulphide of preparation example 1 preparation can be realized discharge cycles 610 times; Existing AA type battery of lithium-iron disulphide can be realized discharge cycles 460 times.
Similarly, AAA type battery of lithium-iron disulphide and the existing AAA type battery of lithium-iron disulphide that respectively preparation example 2 is prepared carries out the discharge performance test.Its test process is as follows: at first discharged 2 seconds with 0.9 watt discharge power, discharged 28 seconds with 0.39 watt discharge power then, so just finish discharge cycles one time.Repeat this discharge cycles 10 times in 1 hour continuously, till discharge voltage drops to 1.05V.The AAA type battery of lithium-iron disulphide of preparation example 2 preparations can be realized discharge cycles 400 times; Existing AAA type battery of lithium-iron disulphide can be realized discharge cycles 310 times.
Employing can avoid effectively according to electric core winding method of the present invention because near the barrier film positive pole ear and/or the negative lug is pierced positive electrode structure that is positioned at the barrier film both sides and the negative pole structure conducting that causes, cause internal short-circuit, can prevent that therefore battery from damaging, improving the useful life and the yields of battery.In addition, adopt the discharge performance of the battery of lithium-iron disulphide for preparing according to electric core winding method of the present invention superior.
The present invention is illustrated by the foregoing description, but should be understood that, the foregoing description just is used for for example and illustrative purposes, but not is intended to the present invention is limited in the described scope of embodiments.It will be appreciated by persons skilled in the art that in addition the present invention is not limited to the foregoing description, can also make more kinds of variants and modifications according to instruction of the present invention, these variants and modifications all drop in the present invention's scope required for protection.Protection scope of the present invention is defined by the appended claims and equivalent scope thereof.
Claims (15)
1. electric core winding method that is used for cylindrical battery of lithium-iron disulphide, described electric core comprises positive electrode structure, negative pole structure and is clipped in barrier film between described positive electrode structure and the described negative pole structure, described positive electrode structure comprises anode pole piece and is arranged on the positive pole ear of described anode pole piece one end, described negative pole structure comprises cathode pole piece and is arranged on the negative lug of described cathode pole piece one end, and described method comprises:
A) the described barrier film of bilayer is sent into the volume pin, accompany described negative pole structure between the double-deck described barrier film, the top that an end that is not provided with described negative lug of described negative pole structure is reeled as described negative pole structure, and the top of described negative pole structure is positioned at after the top of double-deck described barrier film;
B) the described barrier film of bilayer is carried out pre-wound;
C) described positive electrode structure is placed on the most inboard of double-deck described barrier film, and described positive electrode structure is reeled with the described barrier film of bilayer, the top that an end that is provided with described positive pole ear of described positive electrode structure is reeled as described positive electrode structure, the top of described negative pole structure is positioned at after the described positive pole ear;
D) described negative pole structure is reeled with described positive electrode structure and double-deck described barrier film;
E) make described positive electrode structure, described negative pole structure finish coiling successively, wherein, the end of described positive electrode structure is positioned at before the described negative lug, and double-deck described barrier film is not finished coiling prior to described negative pole structure.
2. electric core winding method as claimed in claim 1 is characterized in that, the distance between the top of described negative pole structure and the top of double-deck described barrier film is no less than 20mm.
3. electric core winding method as claimed in claim 1 is characterized in that, the pre-wound size of double-deck described barrier film is no less than 10mm.
4. electric core winding method as claimed in claim 3 is characterized in that the pre-wound of double-deck described barrier film is of a size of 22-30mm.
5. electric core winding method as claimed in claim 3 is characterized in that the pre-wound of double-deck described barrier film is of a size of 10-15mm.
6. electric core winding method as claimed in claim 1 is characterized in that, described c) positive electrode structure described in the step is with the described barrier film of the bilayer predetermined length of reeling, and described predetermined length is 10-20mm.
7. electric core winding method as claimed in claim 6 is characterized in that, described predetermined length is 12-15mm.
8. electric core winding method as claimed in claim 6 is characterized in that, described predetermined length is 10-12mm.
9. electric core winding method as claimed in claim 1 is characterized in that, after described positive electrode structure was reeled end, described negative pole structure continued to reel, so that described negative pole structure wraps up described positive electrode structure fully.
10. electric core winding method as claimed in claim 1 is characterized in that, described negative pole structure is finished coiling prior to the described barrier film of bilayer.
11. electric core winding method as claimed in claim 10 is characterized in that, after described negative pole structure was reeled end, double-deck described barrier film continued coiling 1-3 circle.
12. electric core winding method as claimed in claim 1 is characterized in that, described method also is included in to reel and finishes double-deck described barrier film is clung in the back with adhesive plaster end.
13. electric core winding method as claimed in claim 1 is characterized in that, described b) step also is included in after described pre-wound finishes, and applies tension force at the end of the described barrier film of bilayer.
14. an electric core that is used for cylindrical battery of lithium-iron disulphide is characterized in that, each described electric core winding method makes among the described electric core employing claim 1-13.
15. a cylindrical battery of lithium-iron disulphide is characterized in that, described cylindrical battery of lithium-iron disulphide comprises the described electric core of claim 14.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100312847A CN102122728A (en) | 2011-01-28 | 2011-01-28 | Method for winding cylindrical lithium-iron disulfide battery core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2011100312847A CN102122728A (en) | 2011-01-28 | 2011-01-28 | Method for winding cylindrical lithium-iron disulfide battery core |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103296316A (en) * | 2013-06-09 | 2013-09-11 | 深圳市吉阳自动化科技有限公司 | Battery winding machine and winding needle mechanism thereof |
| CN103545471A (en) * | 2013-10-15 | 2014-01-29 | 东莞超霸电池有限公司 | Battery anode-cathode diaphragm, and preparation method and applications thereof |
| CN106602150A (en) * | 2017-01-17 | 2017-04-26 | 无锡先导智能装备股份有限公司 | Winding device for manufacturing winding element and winding method of winding element |
| 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 |
| CN109830738A (en) * | 2019-03-29 | 2019-05-31 | 无锡先导智能装备股份有限公司 | Cell winding device |
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| CN101485032A (en) * | 2006-05-15 | 2009-07-15 | 株式会社Lg化学 | Double winding-typed electrode assembly |
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| CN103296316A (en) * | 2013-06-09 | 2013-09-11 | 深圳市吉阳自动化科技有限公司 | Battery winding machine and winding needle mechanism thereof |
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| CN103545471A (en) * | 2013-10-15 | 2014-01-29 | 东莞超霸电池有限公司 | Battery anode-cathode diaphragm, and preparation method and applications thereof |
| CN103545471B (en) * | 2013-10-15 | 2016-01-13 | 东莞超霸电池有限公司 | A kind of battery plus-negative plate barrier film, preparation method and application |
| CN106602150A (en) * | 2017-01-17 | 2017-04-26 | 无锡先导智能装备股份有限公司 | Winding device for manufacturing winding element and winding method of winding element |
| CN106602150B (en) * | 2017-01-17 | 2023-09-01 | 无锡先导智能装备股份有限公司 | Winding device and winding method for manufacturing lithium battery winding element |
| 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 |
| CN109830738A (en) * | 2019-03-29 | 2019-05-31 | 无锡先导智能装备股份有限公司 | Cell winding device |
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Application publication date: 20110713 |