CN109888404A - A kind of novel laminated batteries and preparation method thereof - Google Patents
A kind of novel laminated batteries and preparation method thereof Download PDFInfo
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- CN109888404A CN109888404A CN201910176173.1A CN201910176173A CN109888404A CN 109888404 A CN109888404 A CN 109888404A CN 201910176173 A CN201910176173 A CN 201910176173A CN 109888404 A CN109888404 A CN 109888404A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 238000002955 isolation Methods 0.000 claims abstract description 46
- 239000012528 membrane Substances 0.000 claims abstract description 23
- 238000003466 welding Methods 0.000 claims description 23
- 210000005069 ears Anatomy 0.000 claims description 4
- 239000003792 electrolyte Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052744 lithium Inorganic materials 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 12
- 230000008569 process Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 229910001416 lithium ion Inorganic materials 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 238000004080 punching Methods 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 230000002146 bilateral effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000005868 electrolysis reaction Methods 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910017435 S2 In Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Connection Of Batteries Or Terminals (AREA)
Abstract
The present invention relates to technical field of lithium batteries, specifically a kind of novel laminated batteries and preparation method thereof, including battery, shell and connection sheet；Battery is arranged in shell, battery includes several positive plates, several negative electrode tabs and several isolation layers, positive plate includes positive diaphragm and positive pole ear, positive pole ear is connect with positive one group of opposite side of diaphragm, negative electrode tab includes cathode membrane and negative lug, and negative lug is connect with one group of opposite side of cathode membrane, and positive plate is successively staggeredly superimposed with negative electrode tab, positive pole ear and negative lug are in 90 ° of angles, and the gap location between adjacent positive plate and negative electrode tab is arranged in isolation layer；Connection sheet includes positive connection sheet and negative connection sheet, and positive connection sheet is connect with positive pole ear, and negative connection sheet is connect with negative lug.The present invention can reduce internal resistance temperature rise, promotes battery performance, prolongs the service life, and guarantees the series-parallel normal operation of Pack, improves the safety of battery, reduce cost, improves production efficiency.
Description
Technical field
The present invention relates to technical field of lithium batteries, in particular to a kind of novel laminated batteries and preparation method thereof.
Background technique
Commercial Li-ion manufacture craft is broadly divided into takeup type and stacked technique at present.Wherein, winding process is handle
Positive plate and negative electrode tab are separated with the mode of strip sheet with diaphragm, are laminated on and are wound together by circumference or oval mode, shape
At battery roll core.But since the battery of takeup type production it is very thick cannot to be made core, the energy of single battery is limited,
In addition takeup type structure is unfavorable for the quick admittance of lithium ion in pole piece bending place, limits the high rate charge-discharge of battery
Energy.
Laminated structure battery includes the anode pole piece of monolithic and intersects therewith stacking cathode pole piece, anode pole piece and negative
The use diaphragm of pole pole piece separates.That is, existing lamination process is positive and negative anodes to be cut into matrix, it is a piece of from bottom to top
Anode pole piece, a piece of cathode pole piece, it is intermediate to be stacked with diaphragm separation.Although existing laminated structure battery overcomes volume
The shortcomings that wound structure, has obtained very big improvement, but traditional lamination process in terms of monomer capacity and battery high rate performance, because
The cathode pole piece that is positive, which requires to cut into matrix, to be overlapped, and process increases, and the equipment and cost of labor of investment are excessively high, and
In stacked technique, four trimmings of positive and negative anodes matrix are all with membrane contacts, and the probability of pole piece cutting burr puncture diaphragm is significantly
Increase, influences the safety of battery.
In addition, the tab of battery is also critically important, the position of tab is divided into two kinds, a kind of unilateral side tab, positive and negative anodes tab
It is arranged in the same end；Another bilateral tab, the different one end of positive and negative anodes tab；Bilateral tab has apparent excellent than unilateral tab
Point: one side tab can be done sufficiently wide, and current density is bigger, so as to improve the high rate performance of battery；Another aspect pole
Ear is wide, and resistivity is low, and two sides tab makes electronics be more evenly distributed so that the internal resistance of cell reduce, temperature rise reduce and more
It is even, to improve battery performance.But both tabs are arranged during Pack is series-parallel, if any tab goes wrong,
It will affect the operation of entire Pack.
It needs to research and develop a kind of lithium ion battery now, guarantees more broader tabs, output more polyelectron, and electronics
It is more evenly distributed, and then reduces internal resistance temperature rise, and keep interface temperature more consistent, to promote battery performance, extend and use the longevity
Life；It can be operated normally so that Pack is under any tab goes wrong, while burr is less.Process is more succinct, operates simpler
Single, cost is lower.
Summary of the invention
In view of the above problems in the prior art, it the purpose of the present invention is to provide a kind of preparation method of laminated batteries, adopts
It is equipped with positive and negative tab with four end of battery, can reduce internal resistance temperature rise, battery performance is promoted, prolongs the service life, is guaranteed
Pack series-parallel normal operation, while reducing punching process and reducing the probability that burr pierces through diaphragm, improve the safety of battery
Property, cost is reduced, production efficiency is improved.
To solve the above-mentioned problems, the present invention provides a kind of novel laminated batteries, including battery, shell and connection sheet；
The battery is arranged in the shell, the battery include several positive plates, several negative electrode tabs and several every
Exhausted layer, the positive plate include positive diaphragm and two positive pole ears, two positive pole ears respectively with the positive diaphragm
The connection of one group of opposite side, the negative electrode tab include cathode membrane and two negative lugs, two negative lugs respectively with it is described
One group of opposite side connection of cathode membrane, the positive plate are successively staggeredly superimposed with the negative electrode tab, and the positive pole ear is born with described
Pole tab is interlaced, and the gap location between the adjacent positive plate and the negative electrode tab is arranged in the isolation layer；It is described
Connection sheet includes positive connection sheet and negative connection sheet, and the positive connection sheet is connect with the positive pole ear, the negative connection sheet and institute
State negative lug connection.
Further, each positive chip size is identical, and each cathode chip size is identical, each isolation layer
Size is identical.
Further, the length and width of the isolation layer is greater than the length and width of the negative electrode tab, the negative electrode tab
Length and width be greater than the positive plate length and width.
Further, the positive diaphragm and the cathode membrane are coated on both sides structure.
It further, is in 90 ° of angles between the positive pole ear and the negative lug.
Further, the isolation layer is diaphragm or solid-state electrolyte layer.
Another aspect of the present invention protects the preparation method of novel laminated batteries described in one kind, which is characterized in that including
Steps are as follows: S1: preparing several positive plates being sized, negative electrode tab and isolation layer；S2: by the positive plate, negative electrode tab and
Isolation layer is overlapped from bottom to top according to the sequence of a negative electrode tab, an isolation layer, a positive plate, an isolation layer, make it is described just
The positive pole ear of pole piece and the negative lug of the negative electrode tab are interlaced, form the isolation layer and encase the negative electrode tab
Cathode membrane, the cathode membrane of the negative electrode tab encase the positive plate positive diaphragm battery；S3: by positive connection sheet
It is welded to connect with the positive pole ear, negative connection sheet and the negative lug is welded to connect, the welding region of battery is formed；
S4: the heat-seal housing outside the welding region of the battery.
It further, is in 90 ° of angles between the positive pole ear of the positive plate and the negative lug of the negative electrode tab.
Further, the positive plate and the negative electrode tab are independent laminated structure.
Further, several described positive plates form continuous band-shaped structure, have first between two neighboring positive plate
Broken line, several negative electrode tabs form continuous band-shaped structure, have the second broken line between two neighboring negative electrode tab；The step S2
In, by the way that the positive plate is superimposed to the isolation layer along first folding line, by along second folding line
The negative electrode tab is superimposed to the isolation layer.
Due to above-mentioned technical proposal, the invention has the following advantages:
1) novel laminated batteries and preparation method thereof of the invention, four end of battery are equipped with positive and negative tab, can reduce
Internal resistance temperature rise promotes battery performance, prolongs the service life, and guarantees the series-parallel normal operation of Pack.
2) novel laminated batteries and preparation method thereof of the invention reduce the probability that burr pierces through diaphragm, improve battery
Safety, while punching process is reduced, cost is reduced, production efficiency is improved.
Detailed description of the invention
It, below will be to required in embodiment or description of the prior art in order to illustrate more clearly of technical solution of the present invention
The attached drawing used is briefly described.It should be evident that drawings in the following description are only some embodiments of the invention, it is right
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings
Its attached drawing.
Fig. 1 is the structural schematic diagram of the novel battery provided in an embodiment of the present invention；
Fig. 2 is the structural schematic diagram of the positive plate provided in an embodiment of the present invention；
Fig. 3 is the structural schematic diagram of the negative electrode tab provided in an embodiment of the present invention；
Fig. 4 is the flow chart of the preparation method of laminated batteries provided in an embodiment of the present invention；
Fig. 5 is the schematic diagram of step S2 provided by Embodiment 2 of the present invention.
In figure: 1- battery, 11- positive plate, 12- negative electrode tab, 13- isolation layer, 111- anode diaphragm, 112- anode pole
Ear, 121- cathode membrane, 122- negative lug, 2- shell, 3- connection sheet, the positive connection sheet of 31-, the negative connection sheet of 32-.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art without making creative work it is obtained it is all its
His embodiment, shall fall within the protection scope of the present invention.
" one embodiment " or " embodiment " referred to herein, which refers to, may be included at least one implementation of the invention
A particular feature, structure, or characteristic.In the description of the present invention, it is to be understood that, term " on ", "lower", "left", "right",
The orientation or positional relationship of the instructions such as "top", "bottom" is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of retouching
It states the present invention and simplifies description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific
Orientation construction and operation, therefore be not considered as limiting the invention.In addition, term " first ", " second " are only used for retouching
Purpose is stated, relative importance is not understood to indicate or imply or implicitly indicates the quantity of indicated technical characteristic.By
This defines " first ", the feature of " second " can be expressed or what is implied includes one or more of the features.Moreover,
Term " first ", " second " etc. are to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It answers
The data that the understanding uses in this way are interchangeable under appropriate circumstances, so that the embodiment of the present invention described herein can be to remove
Sequence other than those of illustrating or describe herein is implemented.
Embodiment one
The present embodiment one provides a kind of novel laminated batteries, including battery 1, shell 2 and connection sheet 3.
In conjunction with shown in Fig. 1, Fig. 2 and Fig. 3, the battery 1 is arranged in the shell 2, and the battery 1 includes several
A positive plate 11, several negative electrode tabs 12 and several isolation layers 13；Each positive plate 11 is including positive diaphragm 111 and just
Pole tab 112, the positive pole ear 112 and 111 a pair of side connection of the positive diaphragm；Each negative electrode tab 12 includes cathode
Diaphragm 121 and negative lug 122, the negative lug 122 and 121 a pair of side connection of cathode membrane.
Specifically, each 11 size of the positive plate is identical, and each 12 size of negative electrode tab is identical, each isolation
13 size of layer are identical, and the length and width of the isolation layer 13 is greater than the length and width of the negative electrode tab 12, the negative electrode tab
12 length and width is greater than the length and width of the positive plate 11.
Specifically, the positive diaphragm 111 and the cathode membrane 121 are coated on both sides structure.
In conjunction with shown in Fig. 1, Fig. 2 and Fig. 3, the positive plate 11 is successively staggeredly superimposed with the negative electrode tab 12, described in guarantee
Positive pole ear 112 and the negative lug 122 are in 90 ° of angles, between the adjacent positive plate 11 and the negative electrode tab 12
Gap location be equipped with the isolation layer 13, the isolation layer 13 by way of person's hot pressing with the positive plate 11 and the negative electrode tab
12 connections, and then it is prepared into the battery 1, it can guarantee during Pack is series-parallel, if any tab goes wrong, and
The operation of entire Pack is not influenced.
Specifically, the isolation layer 13 is diaphragm or solid-state electrolyte layer.
As shown in Figure 1, the connection sheet 3 include positive connection sheet 31 and negative connection sheet 32, the positive connection sheet 31 with it is described
Positive pole ear 112 is connected by ultrasonic welding mode, forms welding region, the negative connection sheet 32 and the negative lug 122
It is connected by ultrasonic welding mode, forms welding region, the shell 2 is sealed outside the welding region.
Specifically, the connection sheet 3 increases more electronics and electronics is more evenly distributed, in turn for expanding tab
The internal resistance of cell reduce, temperature rise reduce and more evenly, keep interface temperature more consistent, improve battery performance；The shell 2 uses aluminium
Plastic film material.
The present embodiment one provides a kind of novel laminated batteries, and four end of battery is equipped with positive and negative tab, so that more
Electronics and electronics is more evenly distributed, and then the internal resistance of cell reduces, temperature rise reduce and more evenly, keep interface temperature more consistent,
Battery performance is improved, while being guaranteed during Pack is series-parallel, if any tab goes wrong, without influencing entire Pack's
Operation.
Embodiment two
In conjunction with shown in Fig. 4 and Fig. 5, the present embodiment two provides a kind of preparation side for being used to prepare above-mentioned novel laminated batteries
Method includes the following steps: S1: preparing several positive plates being sized, negative electrode tab and isolation layer；S2: it by the positive plate, bears
Pole piece and isolation layer are overlapped from bottom to top according to the sequence of a negative electrode tab, an isolation layer, a positive plate, an isolation layer, are made
The positive pole ear of the positive plate and the negative lug of the negative electrode tab are interlaced, form the isolation layer and encase the cathode
The cathode membrane of piece, the cathode membrane of the negative electrode tab encase the battery of the positive diaphragm of the positive plate；S3: it will just connect
Piece and the positive pole ear are welded to connect, and negative connection sheet and the negative lug are welded to connect, the welding section of battery is formed
Domain；S4: the heat-seal housing outside the welding region of the battery.
Specifically, several described positive plates and the negative electrode tab are continuous structure, the positive plate of continuous structure
On positive pole ear and pole diaphragm be distributed in interval, between the negative lug and pole diaphragm in the negative electrode tab of continuous structure are in
It has a rest distribution.
It specifically, is in 90 ° of angles between the positive pole ear of the positive plate and the negative lug of the negative electrode tab.
Specifically, several described positive plates form continuous band-shaped structure, have the first folding between two neighboring positive plate
Line, several negative electrode tabs form continuous band-shaped structure, have the second broken line between two neighboring negative electrode tab；In the step S2,
By the way that the positive plate is superimposed to the isolation layer along first folding line, by along second folding line by institute
It states negative electrode tab and is superimposed to the isolation layer, circuit sequentially and be prepared into the cathode membrane that the isolation layer encases the negative electrode tab, institute
State negative electrode tab cathode membrane encase the positive plate positive diaphragm battery；One group of opposite side of the battery is equipped with just
Another group of opposite side of pole tab, the battery is equipped with negative lug.
Further, the positive connection sheet of the positive pole ear connects to form welding region by ultrasonic welding, the cathode pole
Ear connect to form welding region with negative connection sheet by ultrasonic welding, the heat-seal housing outside welding region, and the shell heat-sealing is appointed
It anticipates behind three sides, after injecting chemical electrolysis liquid, then seals the last one side, form battery pack.
The present embodiment two provides a kind of preparation method of novel laminated batteries, can reduce cross cutting number, reduces burr
The probability for piercing through diaphragm, improves the safety of battery, while reducing punching process, reduces cost, improves production efficiency, and make
Standby four end of battery is equipped with positive and negative tab, so that more electronics and electronics is more evenly distributed, and then the internal resistance of cell reduces,
Temperature rise reduces and more evenly, keeps interface temperature more consistent, improves battery performance, while guaranteeing during Pack is series-parallel,
Operation if any tab goes wrong, without influencing entire Pack.
Embodiment three
As shown in figure 4, the present embodiment three provides another preparation method for being used to prepare above-mentioned novel laminated batteries, packet
It includes following steps: S1: preparing several positive plates being sized, negative electrode tab and isolation layer；S2: by the positive plate, negative electrode tab
It is overlapped, makes described from bottom to top according to the sequence of a negative electrode tab, an isolation layer, a positive plate, an isolation layer with isolation layer
The positive pole ear of positive plate and the negative lug of the negative electrode tab are interlaced, form the isolation layer and encase the negative electrode tab
Cathode membrane, the cathode membrane of the negative electrode tab encase the battery battery of the positive diaphragm of the positive plate；S3: will just connect
Contact pin and the positive pole ear are welded to connect, and negative connection sheet and the negative lug are welded to connect, the welding of battery is formed
Region；S4: the heat-seal housing outside the welding region of the battery.
It specifically, is in 90 ° of angles between the positive pole ear of the positive plate and the negative lug of the negative electrode tab.
Specifically, the positive plate and the negative electrode tab are independent laminated structure, in the negative electrode tab covering it is described every
Exhausted layer covers the positive plate on the isolation layer, circuits sequentially and be prepared into the cathode that the isolation layer encases the negative electrode tab
Diaphragm, the cathode membrane of the negative electrode tab encase the battery of the positive diaphragm of the positive plate, and one group pair of the battery
Side is equipped with positive pole ear, and another group of opposite side of the battery is equipped with negative lug.
Further, the positive connection sheet of the positive pole ear connects to form welding region by ultrasonic welding, the cathode pole
Ear connect to form welding region with negative connection sheet by ultrasonic welding, the heat-seal housing outside welding region, and the shell heat-sealing is appointed
It anticipates behind three sides, after injecting chemical electrolysis liquid, then seals the last one side, form battery pack.
The present embodiment three and the difference of embodiment two are that several positive plates and negative electrode tab are absolute construction, reduction pair
Step is rolled over, it is easy to operate, while the probability that burr pierces through diaphragm can be reduced, improve the safety of battery；And the electricity prepared
Chi Siduan is equipped with positive and negative tab, so that electronics more transmits, electronics is more evenly distributed, and then the internal resistance of cell reduces, temperature rise
It reduces and more evenly, keeps interface temperature more consistent, improve battery performance, while guaranteeing during Pack is series-parallel, if appointing
One tab goes wrong, the operation without influencing entire Pack.
Above description sufficiently discloses a specific embodiment of the invention.It should be pointed out that being familiar with the field
Range of any change that technical staff does a specific embodiment of the invention all without departing from claims of the present invention.
Correspondingly, the scope of the claims of the invention is also not limited only to previous embodiment.
Claims (10)
1. a kind of novel laminated batteries, which is characterized in that including battery (1), shell (2) and connection sheet (3)；
The battery (1) setting in the shell (2), the battery (1) include several positive plates (11), several
Negative electrode tab (12) and several isolation layers (13), the positive plate (11) include positive diaphragm (111) and two positive pole ears
(112), two positive pole ears (112) connect with described positive (111) one groups of opposite side of diaphragm respectively, the negative electrode tab (12)
Including cathode membrane (121) and two negative lugs (122), two negative lugs (122) respectively with the cathode membrane
(121) one groups of opposite side connections, are in 90 ° of angles, the anode between the positive pole ear (112) and the negative lug (122)
Piece (11) is successively staggeredly superimposed with the negative electrode tab (12), and the positive pole ear (112) and the negative lug (122) are mutually handed over
The gap location between the adjacent positive plate (11) and the negative electrode tab (12) is arranged in mistake, the isolation layer (13)；
The connection sheet (3) includes positive connection sheet (31) and negative connection sheet (32), the positive connection sheet (31) and the positive pole
Ear (112) connection, the negative connection sheet (32) connect with the negative lug (122).
2. a kind of novel laminated batteries according to claim 1, which is characterized in that each positive plate (11) size phase
Together, each negative electrode tab (12) size is identical, and each isolation layer (13) size is identical.
3. a kind of novel laminated batteries according to claim 2, which is characterized in that the length and width of the isolation layer (13)
Degree is greater than the length and width of the negative electrode tab (12), and the length and width of the negative electrode tab (12) is greater than the positive plate (11)
Length and width.
4. a kind of novel laminated batteries according to claim 1, which is characterized in that the anode diaphragm (111) and described
Cathode membrane (121) is coated on both sides structure.
5. a kind of novel laminated batteries according to claim 1, which is characterized in that the positive pole ear (112) with it is described
It is in 90 ° of angles between negative lug (122).
6. a kind of novel laminated batteries according to claim 1, which is characterized in that the isolation layer (13) is for diaphragm or admittedly
State electrolyte layer.
7. a kind of preparation method of the novel laminated batteries as described in any one of claim 1-6, which is characterized in that including
Steps are as follows:
S1: prepare several positive plates being sized, negative electrode tab and isolation layer；
S2: by the positive plate, the negative electrode tab and the isolation layer according to a negative electrode tab, an isolation layer, a positive plate, one every
The sequence of exhausted layer is overlapped from bottom to top, hands over the positive pole ear of the positive plate and the negative lug of the negative electrode tab mutually
Mistake, forms that the isolation layer encases the cathode membrane of the negative electrode tab, the cathode membrane of the negative electrode tab encases the positive plate
Positive diaphragm battery；
S3: positive connection sheet and the positive pole ear are welded to connect, and negative connection sheet and the negative lug are welded to connect, and are formed
The welding region of battery；
S4: the heat-seal housing outside the welding region of the battery.
8. preparation method according to claim 7, which is characterized in that the positive pole ear of the positive plate and the negative electrode tab
Negative lug between be in 90 ° of angles.
9. preparation method according to claim 7, which is characterized in that the positive plate and the negative electrode tab are individual sheets
Shape structure.
10. preparation method according to claim 7, which is characterized in that several described positive plates form continuous band-shaped knot
Structure, has the first broken line between two neighboring positive plate, several negative electrode tabs form continuous band-shaped structure, two neighboring negative electrode tab
Between have the second broken line；
In the step S2, by the way that the positive plate is superimposed to the isolation layer along first folding line, by along institute
It states the second folding line and the negative electrode tab is superimposed to the isolation layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910176173.1A CN109888404A (en) | 2019-03-08 | 2019-03-08 | A kind of novel laminated batteries and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910176173.1A CN109888404A (en) | 2019-03-08 | 2019-03-08 | A kind of novel laminated batteries and preparation method thereof |
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| CN109888404A true CN109888404A (en) | 2019-06-14 |
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| CN201910176173.1A Pending CN109888404A (en) | 2019-03-08 | 2019-03-08 | A kind of novel laminated batteries and preparation method thereof |
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| CN114024042A (en) * | 2021-10-20 | 2022-02-08 | 惠州锂威新能源科技有限公司 | Preparation method of multi-tab lithium battery |
| CN114597598A (en) * | 2022-02-22 | 2022-06-07 | 岚图汽车科技有限公司 | Power battery and vehicle |
| CN116053605A (en) * | 2022-11-21 | 2023-05-02 | 江苏正力新能电池技术有限公司 | Battery cell, battery cell preparation method and lithium battery |
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| CN104900905A (en) * | 2015-06-03 | 2015-09-09 | 深圳市迪凯特电池科技有限公司 | Laminated lithium ion battery and production process thereof |
Cited By (4)
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| CN114024042A (en) * | 2021-10-20 | 2022-02-08 | 惠州锂威新能源科技有限公司 | Preparation method of multi-tab lithium battery |
| CN114597598A (en) * | 2022-02-22 | 2022-06-07 | 岚图汽车科技有限公司 | Power battery and vehicle |
| CN116053605A (en) * | 2022-11-21 | 2023-05-02 | 江苏正力新能电池技术有限公司 | Battery cell, battery cell preparation method and lithium battery |
| CN116053605B (en) * | 2022-11-21 | 2024-03-12 | 江苏正力新能电池技术有限公司 | Battery cell, battery cell preparation method and lithium battery |
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