CN110364769A - A kind of winding battery core and battery - Google Patents
A kind of winding battery core and battery Download PDFInfo
- Publication number
- CN110364769A CN110364769A CN201910702278.6A CN201910702278A CN110364769A CN 110364769 A CN110364769 A CN 110364769A CN 201910702278 A CN201910702278 A CN 201910702278A CN 110364769 A CN110364769 A CN 110364769A
- Authority
- CN
- China
- Prior art keywords
- pole piece
- adhesive tape
- battery core
- rubberizing
- winding
- 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.)
- Pending
Links
- 238000004804 winding Methods 0.000 title claims abstract description 50
- 239000002390 adhesive tape Substances 0.000 claims abstract description 48
- 239000003292 glue Substances 0.000 claims description 28
- 238000000034 method Methods 0.000 claims description 19
- 238000005507 spraying Methods 0.000 claims description 7
- 229910052493 LiFePO4 Inorganic materials 0.000 claims description 3
- 229910002097 Lithium manganese(III,IV) oxide Inorganic materials 0.000 claims description 3
- 239000004642 Polyimide Substances 0.000 claims description 3
- PFYQFCKUASLJLL-UHFFFAOYSA-N [Co].[Ni].[Li] Chemical compound [Co].[Ni].[Li] PFYQFCKUASLJLL-UHFFFAOYSA-N 0.000 claims description 3
- OVAQODDUFGFVPR-UHFFFAOYSA-N lithium cobalt(2+) dioxido(dioxo)manganese Chemical compound [Li+].[Mn](=O)(=O)([O-])[O-].[Co+2] OVAQODDUFGFVPR-UHFFFAOYSA-N 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000012528 membrane Substances 0.000 claims description 3
- 229920001721 polyimide Polymers 0.000 claims description 3
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 3
- 239000004800 polyvinyl chloride Substances 0.000 claims description 3
- 150000005690 diesters Chemical class 0.000 claims 1
- KUCOHFSKRZZVRO-UHFFFAOYSA-N terephthalaldehyde Chemical compound O=CC1=CC=C(C=O)C=C1 KUCOHFSKRZZVRO-UHFFFAOYSA-N 0.000 claims 1
- 238000007731 hot pressing Methods 0.000 abstract description 8
- 229910052744 lithium Inorganic materials 0.000 abstract description 4
- 238000005336 cracking Methods 0.000 abstract description 3
- 238000001556 precipitation Methods 0.000 abstract description 2
- 238000005520 cutting process Methods 0.000 description 22
- 238000005096 rolling process Methods 0.000 description 8
- 238000004026 adhesive bonding Methods 0.000 description 5
- 230000001681 protective effect Effects 0.000 description 5
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 4
- 229910001416 lithium ion Inorganic materials 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 239000004411 aluminium Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- -1 polyethylene terephthalate Polymers 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000000693 micelle Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- KCTAWXVAICEBSD-UHFFFAOYSA-N prop-2-enoyloxy prop-2-eneperoxoate Chemical compound C=CC(=O)OOOC(=O)C=C KCTAWXVAICEBSD-UHFFFAOYSA-N 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
-
- 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
Abstract
The invention discloses a kind of winding battery core and battery, winding battery core includes: pole piece, the pole piece include positive plate and negative electrode tab；Diaphragm is set between the positive plate and the negative electrode tab；Adhesive tape is pasted on the surface of the positive plate, also, the tape-stripping is in the angular position of the positive plate.The adhesive tape also Pasting is in the surface of the negative electrode tab, and the tape-stripping is in the angular position of the negative electrode tab.The pole piece is wherein pasted with the adhesive tape on one side, alternatively, the two-sided of the pole piece pastes the adhesive tape.The present invention can effectively avoid security risk caused by the cracking occurred in pole piece hot pressing, prevent the precipitation of lithium metal by way of rubberizing, improve the security performance of winding battery core.
Description
Technical field
The present invention relates to lithium battery manufacturing technology fields, and in particular to a kind of electricity for winding battery core and include this battery core
Pond.
Background technique
Winding battery core mechanization degree is high at present, and speed is fast, and homogeneity is guaranteed, is conducive to be mass produced, and becomes dynamic
One of main assembling mode of power battery.Winding battery core includes a positive plate, and a negative electrode tab, two diaphragms, diaphragm is in
Between positive and negative anodes, then completed by up- coiler.Battery core needs to carry out hot pressing shaping after winding, so that battery layers and layer
Between gap it is smaller, increase pole piece flatness.Ternary battery mainly uses gluing diaphragm, and micelle melts when hot pressing, by core
Sizing.In hot pressing, since pressure is larger (2-10 tons), core inner ring since the extruding that is subject to is maximum, positive plate or
It is easy to appear be broken negative electrode tab, it is possible to lead to the loss of capacity, it is also possible to lead to anode leakage aluminium or cathode leakage
Copper.Since place curved after doubling can drop off, cathode most serious is filled if at this time cathode falls off in battery
During electric discharge, it is precipitated due to without negative electrode active material, causing the lithium ion in anode to be diffused into cathode herein, it is especially right
There is biggish security risk for ternary battery.And good solution there is no to this phenomenon in industry, only
Optimize relevant parameter in winding and hot pressing, mitigates this phenomenon.
Summary of the invention
The purpose of the invention is to overcome the deficiencies of existing technologies, pole piece hot pressing can effectively be avoided by providing one kind
Security risk caused by the cracking of middle appearance, the winding battery core for preventing lithium metal to be precipitated and battery.
In order to achieve the above object, the present invention provides a kind of winding battery core, include: pole piece, the pole piece include just
Pole piece and negative electrode tab；Diaphragm is set between the positive plate and the negative electrode tab；Adhesive tape is pasted on the positive plate
Surface, also, the tape-stripping is in the angular position of the positive plate.
Preferably, the adhesive tape is also pasted on the surface of the negative electrode tab, and it is pasted on the negative electrode tab
Angular position.
Preferably, the pole piece is wherein pasted with the adhesive tape on one side, alternatively, the two-sided of the pole piece pastes institute
The adhesive tape stated.
Preferably, being wound using winding apparatus to the battery core, the winding apparatus includes volume needle；To roll up needle
The intermediate point of the angular position of side is 0 point, and pole piece is wound to the other side of volume needle, take N as the circle number of winding, A0Enter for cathode
Piece position, C0Enter piece position for anode, D is volume needle perimeter, and Δ t is that positive plate in winding process, negative electrode tab and two layers of diaphragm are thick
The sum of degree；Wherein, the distance of the position of negative electrode tab first lap rubberizing to cathode sheet head is A respectively1=D/2-A0And A2=A1+
The distance that D/2, negative electrode tab N enclose position to the cathode sheet head of rubberizing is A respectively2N-1=A2N-2+ (D+ (N-1) the Δ He of t)/2
A2N=A2N-1+(D+(N-1)Δt)/2；The distance of position to the positive sheet head of positive plate first lap rubberizing is C respectively1=(D+
Δt)/2-C0And C2=C1+ (D+ Δ t)/2, the distance that positive plate N encloses position to the positive sheet head of rubberizing is C respectively2N-1
=C2N-2+ (D+N Δ t)/2, C2N=C2N-1+(D+NΔt)/2。
Preferably, the adhesive tape width and pole piece it is of same size, the length of the adhesive tape is 1-200mm.
Preferably, the adhesive tape with a thickness of 0.001-1mm.
Preferably, the length of tape on every circle pole piece is different, the length of the adhesive tape gradually increases with the every circle of volume one of pole piece
Length gradually shortens；Alternatively, the length of the adhesive tape is isometric on every circle pole piece.
Preferably, the material of the adhesive tape is one of polyethylene terephthalate, polyvinyl chloride, polyimides
Or any two or more combination, alternatively, the adhesive tape is the gel state glue of spraying.
The present invention also provides a kind of battery, which includes above-mentioned winding battery core.
Preferably, the just extremely nickle cobalt lithium manganate of the battery, LiFePO4 is any in nickel cobalt lithium aluminate or LiMn2O4
It is a kind of.
The utility model has the advantages that
(1) present invention can be avoided effectively caused by the cracking occurred in pole piece hot pressing by way of rubberizing
Security risk prevents the precipitation of lithium metal.
(2) positive plate and negative electrode tab surface carry out rubberizing or sprayed glues processing simultaneously, by positive and negative anodes pole piece corner position
Rubberizing is set, inner ring eliminates stress and avoids losing powder, outer ring disconnected band caused by preventing stress excessive.
(3) positive plate and negative electrode tab angular position rubberizing, the flexibility on the one hand increasing pole piece avoid the disconnected of pole piece
It splits, even if on the other hand there is fracture, adhesive tape can cover breaking part.
Detailed description of the invention
Fig. 1 is the schematic diagram of rubberizing or sprayed glues position in winding battery core of the invention；Wherein A0, C0It is negative respectively
Pole enters piece position, A with anode1、A2、A3、A4、A5For cathode rubberizing or sprayed glues position；C1、C2、C3、C4、C5For anode
Rubberizing or sprayed glues position.
Specific embodiment
Below in conjunction with drawings and examples, the following further describes the technical solution of the present invention.
In hot pressing, since the extruding being subject to is maximum, positive plate or negative electrode tab are easy to out battery roll core inner ring
The case where being now broken, it is possible to lead to the loss of capacity, it is also possible to lead to anode leakage aluminium or cathode leakage copper.In order to avoid this
Phenomenon, it may be considered that anode and negative terminal surface are subjected to rubberizing or sprayed glues are handled, positive and negative anodes pole piece angular position is pasted
Glue, inner ring eliminate stress and avoid losing powder, outer ring disconnected band caused by preventing stress excessive；The flexible of pole piece is on the one hand increased in this way
Property avoid the fracture of pole piece, even if on the other hand there is fracture, adhesive tape can cover breaking part, avoid in charge and discharge process
Middle lithium ion is precipitated and bring security risk.
As shown in Figure 1, winding battery core of the invention includes: positive plate 2, negative electrode tab 1 are set to the positive plate 2 and institute
State the diaphragm 3 between negative electrode tab 1, the adhesive tape for the angular position for being pasted on pole piece (shows the paste position A of adhesive tape in figure1~A5；
C1~C5).Angular position refers to the position bent when pole piece coiling.Adhesive tape single side has viscosity.
The tape-stripping is in the surface of positive plate 2, also, the tape-stripping turns in the positive plate 2
Angle Position avoids the lithium ion in charge and discharge process from being precipitated and bring security risk.
The adhesive tape can also be pasted on simultaneously the surface of negative electrode tab 1, and be pasted on the corner of the negative electrode tab 1
Position avoids cathode from leaking copper.Positive and negative anodes pole piece enters die-cutting process, in order to meet the degree of registration of winding, rubberizing after roll-in
Position should meet following rule.When positive and negative anodes pole piece carries out rubberizing respectively, the battery core is rolled up using winding apparatus
Around the winding apparatus includes volume needle.To the distance of cathode sheet head, (head of pole piece is extremely for the position of first lap cathode rubberizing
The length of rubberizing position) it is A respectively1=D/2-A0、A2=A1+D/2；Second circle is A3=A2+(D+Δt)/2、A4=A3+(D+Δ
t)/2；Reasoning can obtain, and the distance that cathode N encloses position to the cathode sheet head of rubberizing is A respectively2N-1=A2N-2+(D+(N-1)Δ
t)/2、A2N=A2N-1+(D+(N-1)Δt)/2.The distance of positive rubberizing position to the positive sheet head of first lap is C1=(D+
Δt)/2-C0、C2=C1+(D+Δt)/2；Second circle is C3=C2+(D+2Δt)/2、C4=C3+(D+2Δt)/2；Reasoning can
, the distance that anode N encloses position to the positive sheet head of rubberizing is C respectively2N-1=C2N-2+(D+NΔt)/2、C2N=C2N-1+
(D+N Δ t)/2, wherein N is the circle number of winding, A0Enter piece position, C for cathode0Enter piece position for anode, D is volume needle perimeter, Δ t
For the sum of positive plate, negative electrode tab and two layers of membrane thicknesses in winding process.In above-mentioned formula, to roll up the angular position of needle side
Intermediate point is 0 point, and pole piece is wound to the other side of volume needle.Pole piece head refers to the section start of pole piece.The head of pole piece is to rubberizing
The length of position refers to length when pole piece is not wound or pole piece trails between the head of pole piece and rubberizing position.The position of rubberizing
Set the location of the midpoint of adhesive tape when referring to rubberizing.In winding process, positive and negative anodes, which enter piece position, should meet A0And C0Design
Value, just can guarantee that the position of adhesive tape is accurate in this way.
In specific implementation process, in the surface rubberizing of pole piece, it can be one of face paste glue in pole piece, be also possible to
Two equal rubberizings in face.Rubberizing position is applicable in above-mentioned formula.Two equal rubberizings in face can be better protected from picking or disconnected band.
The length of the adhesive tape is 1-200mm, preferred length 4-10mm.
In specific implementation process, the length of tape on every circle pole piece can be different, for example, the length of the adhesive tape is with pole
The every circle of volume one of piece gradually increases or gradually shortens；Alternatively, the length of the adhesive tape is isometric on every circle pole piece.In Fig. 1, pole piece
Every volume one encloses, i.e., when the every circle of volume one of positive plate or the every volume one of negative electrode tab enclose, the length of adhesive tape gradually increases.
The adhesive tape with a thickness of 0.001-1mm, preferably with a thickness of 0.01-0.05mm.
The material of the adhesive tape is for one of polyethylene terephthalate, polyvinyl chloride, polyimides or arbitrarily
Two or more combinations allows lithium ion alternatively, the adhesive tape is the gel state glue of spraying, such as epoxy acrylate
Pass through.
Thickness in order to guarantee battery core is not exceeded, can be with anode pole piece rubberizing, cathode pole piece not rubberizing.
As needed, it can choose in all rubberizings of all circle numbers of whole pole piece or only in circle segment number rubberizing.For example,
The rubberizing of battery core outer ring, disconnected band caused by preventing stress excessive.
Winding battery core of the invention can be used for just extremely nickle cobalt lithium manganate, LiFePO4, nickel cobalt lithium aluminate or LiMn2O4
Deng battery in.
The completion of rubberizing process can be completed in laser die cutting, slitting, winding process, can also use individual equipment
Carry out rubberizing.
Embodiment 1
Battery core pole piece in the process of production and processing, needs to cut tab, and the tab after cutting also needs the hole Mark to identify,
A recess will be cut in tab top position in this way, the rolling step for arriving after giving provides identification marking.
Increase tape sticking device in former rolling step and carries out rubberizing.
A method of improve winding battery core security performance, including positive and negative anodes pole piece by after roll-in by primary slitting
Die-cutting machine carries out tab cutting, and hardware or laser die cutting machine are after having beaten the hole Mark, and by increased tape sticking device, equipment is drawn
Dynamic positive and negative anodes pole piece is mobile, in corresponding position rubberizing.Assuming that rolling up needle Zhou Changwei 250mm when battery design, anode enters piece position
For C0For 30mm, cathode enters piece position A0For 15mm, (i.e. positive and negative anodes pole piece head is along volume needle periphery to the angular position for rolling up needle side
Intermediate point distance), 160 μm of battery positive pole piece thickness, 110 μm of cathode pole piece thickness, 16 μm of membrane thicknesses, can calculate
Δ t=0.16mm+0.11mm+0.016mm*2=0.302mm out；Rubberizing position (the head of pole piece to rubberizing position of anode
Length) C1, C2, C3Respectively 95.151mm, 220.302mm, 345.604mm, the rubberizing position (head of pole piece to patch of cathode
The length of glue position) A1, A2, A3Respectively 110mm, 235mm, 360.151mm, other positions are calculated according to above-mentioned formula.
Anode pole piece rubberizing is completed by positive die-cutting machine respectively, and the position rubberizing distance Mark is respectively C1, C2,
C3....C2N；Cathode pole piece rubberizing is completed by cathode die-cutting machine, and the position rubberizing distance Mark is respectively A1, A2, A3....A2N,
The circle number of rubberizing, which can control by periodically manually opening or closing adhesive tape rubberizing mechanism, to be completed, and machine program reality can also be passed through
It now automatically controls, controls the quantity of rubberizing.Can by be die cut airborne device adjustment, select positive and negative electrodes in same when rubberizing, can also
Positive (cathode die-cutting machine does not increase adhesive tape rubberizing mechanism) is only pasted with selection, the width of rubberizing can be by drawing gluing mechanism to be adjusted.
Then pole piece enters the process of secondary slitting, slitting and after pasting adhesive tape, and positive and negative anodes pole piece enters rolling step in rolls respectively, complete
At the winding of battery core, the battery core for posting protective glue band is obtained.
Embodiment 2
A method of improve winding battery core security performance, including positive and negative anodes pole piece by after roll-in by primary slitting
Die-cutting machine carries out tab cutting, carries out second of slitting after tab cutting, increases tape sticking device in slitting, and equipment pulls just
Cathode pole piece is mobile, and in corresponding position rubberizing, the positive position rubberizing distance Mark is respectively C1, C2, C3....C2N；Cathode pole
Piece rubberizing is completed by cathode die-cutting machine, and the position rubberizing distance Mark is respectively A1, A2, A3....A2N, the circle number of rubberizing can control
System is completed by periodically manually opening or closing adhesive tape rubberizing mechanism, can also be realized and be automatically controlled by machine program, control
The quantity of rubberizing.Can by the adjustment of secondary slitting airborne device, select positive and negative electrodes in same when rubberizing, also can choose only patch just
The width of pole (the secondary banding machine of cathode does not increase adhesive tape rubberizing mechanism), rubberizing can be by drawing gluing mechanism to be adjusted.Positive and negative anodes pole
Piece enters rolling step in rolls respectively, completes the winding of battery core, obtains the battery core for posting protective glue band.
Embodiment 3
A method of improve winding battery core security performance, including positive and negative anodes pole piece by after roll-in by primary slitting
Die-cutting machine carries out tab cutting, and hardware or laser die cutting machine carry out secondary slitting after having beaten the hole Mark.Expect on the winder
During, by the adhesive tape rubberizing mechanism on up- coiler, positive rubberizing positional distance Mark is respectively C1, C2, C3....C2N；Cathode
Rubberizing positional distance Mark is respectively A1, A2, A3....A2N, the circle number of rubberizing can control by periodically manually opening or closing
Adhesive tape rubberizing mechanism is closed to complete, can also be realized and be automatically controlled by machine program, control the quantity of rubberizing.Up- coiler can be passed through
The adjustment of upper device, select positive and negative electrodes in same when rubberizing, also can choose only paste anode (up- coiler negative side does not increase glue plastering machine
Structure), the width of rubberizing can be by drawing gluing mechanism to be adjusted.The positive and negative anodes pole piece for posting protective glue enters the winding of up- coiler
Station is wound, and obtains the battery core for posting protective glue band.
Embodiment 4
A method of improve winding battery core security performance, including positive and negative anodes pole piece by after roll-in by primary slitting
Die-cutting machine carries out tab cutting, and hardware or laser die cutting machine carry out secondary slitting after having beaten the hole Mark.After secondary slitting,
Again by automatic adhesive sticking machine, rubberizing is carried out, positive rubberizing positional distance Mark is respectively C1, C2, C3....C2N；Cathode rubberizing away from
That from Mark is respectively A1, A2, A3....A2N, the circle number of rubberizing can control to be pasted automatically by periodically manually opening or closing
Glue machine is completed, and can also be realized and be automatically controlled by machine program, control the quantity of rubberizing.It can be by automatic adhesive sticking machine
The adjustment of device, rubberizing when selecting positive and negative electrodes in same, also can choose and only pastes positive (cathode does not pass through automatic adhesive sticking machine rubberizing), patch
The width of glue can be by drawing gluing mechanism to be adjusted.Positive and negative anodes pole piece entered rolling step in rolls respectively after pasting adhesive tape, complete
At the winding of battery core, the battery core for posting protective glue band is obtained.
Embodiment 5
A method of improve winding battery core security performance, including positive and negative anodes pole piece by after roll-in by primary slitting
Die-cutting machine carries out tab cutting, and hardware or laser die cutting machine carry out secondary slitting after having beaten the hole Mark.After secondary slitting,
Again by sprayed glues machine, spraying gel state glue is carried out, the process of spraying is completed in a closed structure, and with baking
Dry function, prevents the adhesion of glue, positive spraying position distance Mark is respectively C1, C2, C3....C2N；Cathode spray distance
Mark is respectively A1, A2, A3....A2N, the circle number of rubberizing can complete by periodically manually opening or closing sprayed glues machine,
It can also be realized and be automatically controlled by machine program, control the quantity of rubberizing.The width and speed of sprayed glues are adjustable,
It can control equipment selection anode spraying, cathode does not spray (cathode does not pass through sprayed glues machine).Positive and negative anodes pole after sprayed glues
Piece enters rolling step in rolls respectively, completes the winding of battery core, obtains the battery core for posting protection glue.
In conclusion the present invention by way of rubberizing, improves the security performance of winding battery core.
It is discussed in detail although the contents of the present invention have passed through above preferred embodiment, but it should be appreciated that above-mentioned
Description is not considered as limitation of the present invention.After those skilled in the art have read above content, for of the invention
A variety of modifications and substitutions all will be apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (10)
1. a kind of winding battery core, characterized by comprising:
Pole piece, the pole piece include positive plate and negative electrode tab；
Diaphragm is set between the positive plate and the negative electrode tab；
Adhesive tape is pasted on the surface of the positive plate, also, the tape-stripping is in the corner position of the positive plate
It sets.
2. winding battery core according to claim 1, which is characterized in that the adhesive tape is also pasted on the negative electrode tab
Surface, and it is pasted on the angular position of the negative electrode tab.
3. winding battery core according to claim 2, which is characterized in that the pole piece is wherein pasted with the glue on one side
Band, alternatively, the two-sided of the pole piece pastes the adhesive tape.
4. winding battery core according to claim 3, it is characterised in that:
The battery core is wound using winding apparatus, the winding apparatus includes volume needle；
With roll up needle side angular position intermediate point be 0 point, pole piece to volume needle the other side wind, with N be wind circle number,
A0Enter piece position, C for cathode0Enter piece position for anode, D is volume needle perimeter, and Δ t is positive plate, negative electrode tab and two in winding process
The sum of layer membrane thicknesses；Wherein,
The distance of position to the cathode sheet head of negative electrode tab first lap rubberizing is A respectively1=D/2-A0And A2=A1+ D/2, negative electrode tab
The distance that N encloses position to the cathode sheet head of rubberizing is A respectively2N-1=A2N-2+ ((N-1) Δ t)/2 D+ and A2N=A2N-1+(D+
(N-1)Δt)/2；
The distance of position to the positive sheet head of positive plate first lap rubberizing is C respectively1=(D+ Δ t)/2-C0And C2=C1+(D+
Δ t)/2, the distance that positive plate N encloses position to the positive sheet head of rubberizing is C respectively2N-1=C2N-2+ (D+N Δ t)/2, C2N
=C2N-1+(D+NΔt)/2。
5. winding battery core according to claim 1 or 2, which is characterized in that the width of the adhesive tape and the width of pole piece
Identical, the length of the adhesive tape is 1-200mm.
6. winding battery core according to claim 1 or 2, which is characterized in that the adhesive tape with a thickness of 0.001-1mm.
7. winding battery core according to claim 1 or 2, which is characterized in that the length of tape on every circle pole piece is different, described
The length of adhesive tape gradually increase with pole piece every volume one circle or gradually shorten；Alternatively, the length of the adhesive tape is in every circle pole piece
It is upper isometric.
8. winding battery core according to claim 1 or 2, which is characterized in that the material of the adhesive tape is poly- terephthaldehyde
One of sour second diester, polyvinyl chloride, polyimides or any two or more combination, alternatively, the adhesive tape is spraying
Gel state glue.
9. a kind of battery, which is characterized in that include winding battery core described in claim 1-8 any one.
10. battery according to claim 9, which is characterized in that the just extremely nickle cobalt lithium manganate of the battery, LiFePO4,
Any one in nickel cobalt lithium aluminate or LiMn2O4.
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| CN115020632A (en) * | 2022-08-10 | 2022-09-06 | 江苏时代新能源科技有限公司 | Positive pole piece and preparation method thereof, electrode assembly, battery monomer and battery |
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| CN114976478B (en) * | 2022-06-02 | 2023-07-28 | 湖北亿纬动力有限公司 | Parameter design method for preparing battery core of passenger car by single-sided gluing diaphragm and power battery |
| CN115020632A (en) * | 2022-08-10 | 2022-09-06 | 江苏时代新能源科技有限公司 | Positive pole piece and preparation method thereof, electrode assembly, battery monomer and battery |
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Application publication date: 20191022 |