CN102544577A - Special-shaped lithium ion battery and manufacturing method therefor - Google Patents
Special-shaped lithium ion battery and manufacturing method therefor Download PDFInfo
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Abstract
The invention belongs to the technical field of lithium ion batteries and particularly relates to a special-shaped lithium ion battery. The special-shaped lithium ion battery comprises a positive plate, a negative plate, a diaphragm and an encapsulation film, wherein a positive plate punched hole is formed in the positive plate; a negative plate punched hole is formed in the negative plate; a diaphragm punched hole is formed in the diaphragm; the positive plate, the negative plate and the diaphragm are manufactured into a battery core by a winding or laminating process; and centers of the positive plate punched hole, the negative plate punched hole and the diaphragm punched hole are on the same straight line to form a communicated notch. Compared with the prior art, the special-shaped lithium ion battery has the advantages of increasing electrolyte absorption channels due to the holes, promoting electrolyte absorption by the plates, improving electrolyte infiltration on the plates and improving cycling performance of the lithium ion battery. The special-shaped lithium ion battery solves the problem that the traditional lithium ion battery cannot meet the requirement of special-shaped electronic products on the power supply. In addition, the invention also discloses a method for manufacturing the special-shaped lithium ion battery.
Description
Technical field
The invention belongs to technical field of lithium ion, specifically, the present invention relates to a kind of special-shaped lithium ion battery and manufacturing approach thereof.
Background technology
Lithium ion battery has obtained at aspects such as mobile device (like MP3, mobile phone, notebook computer), electric automobile, military and space using widely owing to have energy density height, environmental protection and advantage such as have extended cycle life.
Along with the fast development of electronic technology, market competition also is growing more intense.The quality of electronic product is more and more lighter, and thickness is also more and more thinner, and this energy density to battery has proposed increasingly high requirement.In addition, because the raising of development of electronic technology and raw material production technology, the useful life of electronic product is also more and more longer, so also increasingly high for the requirement of the cycle life of lithium ion battery.Improve the useful life of lithium ion battery, not only can reduce the use cost of battery, also can reduce the scrappage of lithium ion battery simultaneously, can really accomplish environmental protection.
Be generally 300 and be recycled to 500 circulations the useful life of tradition lithium ion battery, and the function of use of current electronic product is more and more, and quickening causes in use discharging; Especially concerning current smart mobile phone and Notebook Battery; If the program of operation is more, filled once electricity at least in one day, like this; For traditional lithium ion battery, its corresponding electronic product useful life is the 1 year time to a year and a half basically.Improve terminal use's use cost so greatly, also be unfavorable for environmental protection simultaneously.
The principal element that influences lithium ion battery cycle life has: both positive and negative polarity active material kind, and electrolyte type and electrolyte uptake, working procedure parameter (like the compacted density size) discharges and recharges condition, lithium ion battery environment for use etc.When the both positive and negative polarity active material, discharge and recharge after condition and environment for use confirm, the factor that influences lithium ion battery cycle life mainly is the uptake of electrolyte.One of the factor that influences the electrolyte uptake is the electrolyte groundwater increment, and another one is the compacted density of positive/negative plate.The size of compacted density influences the porosity of pole piece, and then influences the absorption of pole piece to electrolyte.And lithium ion battery in use, because the reason of side reaction, electrolyte can be consumed in anodal and negative terminal surface; Cause the electrolyte content of inside lithium ion cell to reduce; Side reaction simultaneously makes the interface impedance of battery increase, so lithium ion battery cycle life can decay, particularly consumes the later stage at electrolyte; Impedance meeting increase is faster, and the cycle life decay is also accelerated.
Traditional lithium ion battery is to realize long circulation life through the compacted density that reduces both positive and negative polarity; The benefit of doing like this is to increase the porosity of pole piece through reducing compacted density; Increase the uptake of pole piece, guarantee that inside lithium ion cell has enough electrolyte to increase cycle life electrolyte content.But it is low excessively to work as the both positive and negative polarity compacted density; Then can cause in the intergranular contact variation, particularly lithium ion battery use the pole piece internal impact more to worsen between particle and contact, make that negative terminal surface is analysed lithium when charging; High rate performance variation during discharge, it is poorer to make that also the battery circulation becomes.And in actual production process, because the influence of equipment precision and technology controlling and process level is on the low side like coating weight; The equipment pressure of colding pressing diminishes, and possibly cause the compacted density of part pole piece on the low side, thereby causes battery circulation variation; Even cause battery to analyse lithium, and then influence cell safety.
In addition, in order to improve the electronic product competitiveness, the part consumption electronic product changes to heteromorphosis, and the profile of electronic product is also more and more diversified now.The bluetooth earphone of banana-shaped for example, circular MP3, circular mobile phone, the electronics watch of toroidal, the square electronic clock of embedded transparent circular electronic console etc.Mostly traditional lithium ion battery shape is cuboid or cylinder; Generally speaking; In order to satisfy the needs of special-shaped electronic product, when a traditionally shaped energy content of battery density can not satisfy the electronic product requirement, cell designer all can be according to the overall dimension of electronic product; The battery that designs corresponding size in the proper site of this electronic product carries out parallel connection, in the hope of satisfying the requirement that discharges and recharges of this shape product.And for this kind electronic product, the consequence of selecting a plurality of battery parallel waies for use is directly to cause electronic product inner space utilance seriously to descend, and has particularly increased the product grouping process, and this will cause the battery production cost to improve greatly.So be necessary to provide a kind of new lithium ion battery manufacture method to satisfy the demand of above-mentioned special shape battery.
In view of this, necessary a kind of special-shaped lithium ion battery and manufacturing approach thereof with long circulation life be provided.
Summary of the invention
One of the object of the invention is: to the deficiency of prior art, and a kind of special-shaped lithium ion battery with long circulation life is provided.
In order to achieve the above object, the present invention adopts following technical scheme:
A kind of special-shaped lithium ion battery; Comprise positive plate, negative plate, barrier film and encapsulating film, offer the positive plate punching on the described positive plate, offer the negative plate punching on the negative plate; Offer the barrier film punching on the barrier film; With positive plate, barrier film and negative plate through reeling or after lamination technology processed electric core, the center of positive plate punching, negative plate punching and barrier film punching was all dropped on same the straight line, forms the breach that is communicated with.
With respect to prior art; Special-shaped lithium ion battery of the present invention has promoted the absorption of pole piece to electrolyte because the existence of punching has increased the passage that electrolyte absorbs, and has improved the infiltration of electrolyte to pole piece; The internal resistance of battery obviously reduces, and has improved the cycle performance of lithium ion battery.
As a kind of improvement of the present invention's abnormity lithium ion battery, said positive plate punching, negative plate punching and barrier film punching are opened in the central area or the marginal zone of electric core respectively.
As a kind of improvement of the present invention's abnormity lithium ion battery, circular, square, the triangle or trapezoidal of being shaped as of said positive plate punching, negative plate punching and barrier film punching.
As a kind of improvement of the present invention's abnormity lithium ion battery, said encapsulating film is provided with the encapsulating film punching, and the center of said encapsulating film punching and electric core punching is dropped on same the straight line.
A kind of improvement as the present invention's abnormity lithium ion battery; The diameter of positive plate punching, negative plate punching, barrier film punching and encapsulating film punching or the length of side are more than or equal to 0.1 μ m; But be less than the width of pole piece, do not rupture and can normally reel to guarantee pole piece.
Another object of the present invention is to provide a kind of manufacturing approach of special-shaped lithium ion battery, may further comprise the steps:
S1 offering positive plate punching and negative plate punching respectively through stirring, be coated with, cold pressing and divide on positive plate that cutting process makes and the negative plate, offers the barrier film punching on barrier film;
S2 processes electric core with the positive plate that offers punching respectively, negative plate and barrier film through coiling or lamination technology, and the center of positive plate punching, negative plate punching and barrier film punching is all dropped on same the straight line, forms the electric core punching that is communicated with;
S3, the electric core that will have punching is put into encapsulating film, and fluid injection encapsulates, changes into, makes special-shaped lithium ion battery behind the capacity.
Certainly, before preparation, calculate the used positive plate of lithium ion battery, negative plate and diaphragm size according to capacity requirement; During punching, need require to carry out according to the result of accurate Calculation and battery size die-cut, to punch out the punching size and dimension that needs.
As a kind of improvement of the manufacturing approach of the present invention abnormity lithium ion battery, before the electric core that will have punching is put into encapsulating film, on encapsulating film, offer the encapsulating film punching earlier among the S3, the center of encapsulating film punching and electric core punching is dropped on same the straight line.Because encapsulate the die-cut encapsulating film in back earlier; Solved the problem of the encapsulating film contraposition after die-cut like this; Process efficiency and the rate of finished products of making lithium ion battery have been improved; Improve the leakage problem to cause because the contraposition of die-cut position is uneven or because the uneven problem of scrapping that causes of encapsulating film contraposition up and down, the reduction manufacturing cost.
A kind of improvement as the manufacturing approach of the present invention abnormity lithium ion battery; Before painting process, on plus plate current-collecting body and negative current collector, offer positive plate punching and negative plate punching among the S1 respectively; And then be coated with, cold pressing and divide cutting process, die-cut collector is coated with again earlier, passes through cold pressing process then; Such process flow can cover die-cut collector burr with diaphragm, causes pole piece burrs on edges problem so improved direct die-cut pole piece.In addition,, cold pressing, can improve the problem of the pole piece edge dry linting that causes because of direct die-cut pole piece like this, improve the utilance of pole piece because die-cut collector is coated with again earlier.The internal short-circuit problem that the inside battery of also having avoided simultaneously causing because of the pole piece dry linting possibly occur has lowered the safe fire risk and the too fast risk of voltage decline of battery, has improved the security feature and the operating characteristic of this kind lithium ion battery.
As a kind of improvement of the manufacturing approach of the present invention abnormity lithium ion battery, circular, square, the triangle or trapezoidal of being shaped as of the punching of positive plate described in the S1, negative plate punching and barrier film punching.
As a kind of improvement of the manufacturing approach of the present invention abnormity lithium ion battery, the diameter of positive plate punching, negative plate punching, barrier film punching and encapsulating film punching or the length of side are more than or equal to 0.1 μ m.
With respect to prior art; The manufacturing approach of lithium ion battery of the present invention has solved traditional lithium ion battery can not satisfy the problem of special shape electronic product to the demand of power supply, and the position of particularly placing battery has protruding perhaps part to need the electronic product of hollow out.Adopt lithium ion battery of the present invention, solved because electronic product profile irregular (like local crowning) and the problem of a plurality of batteries parallel connections of the needs that cause.Under the prerequisite that satisfies the electronic product capacity, the present invention has significantly reduced the production quantity of lithium ion battery, has improved the production efficiency of lithium ion battery.From the process efficiency angle, the present invention reduces number of batteries because substitute a plurality of batteries with a battery, has improved the efficient that packaging process, electrolyte pour into operation, has cancelled the grouping operation of battery, has improved formation device and volume test usage ratio of equipment.So adopt the cost of manufacture of lithium ion battery of the present invention to reduce greatly, for the extensive use of lithium ion battery provides strong assurance.Simultaneously also strong condition is provided, can have satisfied the daily life needs of people more widely electronic product for the variation of electronic product shape.In addition, adopt lithium ion battery of the present invention, because there are concave design or hollow out design in the part, this lithium ion battery matches with the electronic product profile to the depression or the hollow out position of correspondence, also can play the effect of self-contained battery.Place battery and perhaps rock, can play the not impaired effect of protection battery corner angle, reduce internal short-circuit appears in battery because of the corner is squeezed probability at the electronic product internal displacement.
Description of drawings
Below in conjunction with accompanying drawing and embodiment, the present invention and useful technique effect thereof are carried out detailed explanation, wherein:
Fig. 1 is the special-shaped lithium ion battery sketch map of cylinder type hollow out for the present invention is middle;
Fig. 2 is provided with the special-shaped lithium ion battery sketch map of rectangular indentation for limit of the present invention;
Fig. 3 is provided with the special-shaped lithium ion battery sketch map of arc notch for angle of the present invention;
Fig. 4 is the special-shaped lithium ion battery sketch map of local dent of the present invention.
Embodiment
Comparative Examples (traditional lithium ion battery)
The preparation of positive plate: with LiCoO
2(cobalt acid lithium), superconduction carbon (Super-P), Kynoar (PVDF) add the middle mixing of N-methyl pyrrolidone (NMP) according to mass ratio and stir at 95.0: 2.5: 2.5; Obtain having the slurry of certain flowability; Then the gained slurry is coated in the two sides of the thick metal aluminum foil of 16um, is dried into pole piece with certain pliability.Then through colding pressing, itemize, the positive pole ear of processing with the thick aluminium flake of 0.4mm again is connected on the aluminium foil and makes positive plate.
The preparation of negative plate: with graphite, superconduction carbon (Super-P), carboxymethyl cellulose (CMC), butadiene-styrene rubber (SBR) according to mass ratio 95.5: 1.5:: add at 1.5: 1.5 and to mix in the solvent deionized water and stir; Obtain having the slurry of certain flowability; Again above-mentioned slurry is coated in the two sides of the thick metal copper foil of 12um, is dried into pole piece with certain flexibility.Then through colding pressing, itemize (promptly positive/negative plate being cut out, cut into the size of required size), the negative lug of processing with the thick copper sheet of 0.4mm again makes negative plate after being connected on the Copper Foil.
Barrier film adopts polypropylene (PP)-polyethylene (PE)-three layers of laminated film of polypropylene PP.
Process electric core to the positive plate of making, negative plate and barrier film through lamination or winding process, then electric core is packed in the encapsulating film, after the heat-seal, in battery, inject electrolyte, with lithium hexafluoro phosphate (LiPF
6) be lithium salts, the ethylene carbonate with 20%, 30% methyl ethyl carbonate and 50% dimethyl carbonate are solvent, and wherein, the concentration of lithium hexafluoro phosphate is 1M, and through changing into, technologies such as ageing make finished product electricity core again.
Embodiment 1
What at first need explain a bit is before the preparation, to calculate the used positive plate of lithium ion battery, negative plate and diaphragm size according to capacity requirement;
During punching, need require to carry out according to result of calculation and battery size die-cut, to punch out the punching size and dimension that needs.
Positive plate preparation: with LiCoO
2(cobalt acid lithium), superconduction carbon (Super-P), Kynoar (PVDF) add the middle mixing of N-methyl pyrrolidone (NMP) according to mass ratio and stir at 95.0: 2.5: 2.5; Obtain having the slurry of certain flowability; Then the gained slurry is coated in the two sides of the thick metal aluminum foil of 16um, is dried into pole piece with certain pliability.Cold pressing then, itemize, behind the itemize punching is carried out in corresponding electric each layer of core of pole piece position, obtain the positive plate punching, the hole be shaped as circle, bore dia is 15mm, will be connected on the aluminium foil with the positive pole ear that the thick aluminium flake of 0.4mm is processed and make positive plate.
Negative plate preparation: with graphite, superconduction carbon (Super-P), carboxymethyl cellulose (CMC), butadiene-styrene rubber (SBR) according to mass ratio according to mass ratio 95.5: 1.5:: add at 1.5: 1.5 and to mix in the deionized waters and stir; Obtain having the slurry of certain flowability; Again above-mentioned slurry is coated in the two sides of the thick metal copper foil of 12um, is dried into pole piece with certain flexibility.Cold pressing then, itemize (promptly to cut out, cut into the size of required size through negative plate); Carry out punching in corresponding electric each layer of core of pole piece position then; Obtain the negative plate punching, the hole be shaped as circle, bore dia is 13mm; After will being connected on the Copper Foil with the negative lug that the thick copper sheet of 0.4mm is processed again, make negative plate.
Barrier film preparation: barrier film can adopt polypropylene (PP)-polyethylene (PE)-three layers of laminated film of polypropylene (PP), and punching is carried out in corresponding electric each layer of core position, obtains the barrier film punching, the hole be shaped as circle, bore dia is 10mm.
The encapsulating film preparation: encapsulating film adopts aluminum-plastic composite membrane, and its structure is nylon-aluminium foil-polypropylene from outside to inside.Up and down punching of encapsulating film obtains the encapsulating film punching, the hole be shaped as circle, bore dia is 7mm.
The center of the punching of above positive plate, negative plate, barrier film, encapsulating film all on same center line, with guarantee after encapsulation porose center overlap.
Process electric core to the positive plate of making, negative plate and barrier film through lamination or coiling, electric core is packed into carry out packaging process in the battery packages shell then, after the heat-seal, in battery, inject electrolyte, with lithium hexafluoro phosphate (LiPF
6) be lithium salts, the ethylene carbonate with 20%, 30% methyl ethyl carbonate and 50% dimethyl carbonate are solvent, and wherein, the concentration of lithium hexafluoro phosphate is 1M, and through changing into, technologies such as ageing make finished product electricity core again., as shown in Figure 1 in the middle of the lithium ion battery that makes for the cylinder type hollow out.
For this lithium ion battery that is provided with engraved structure, when encapsulating again; Except carrying out closedtop and side seal, the position of middle hollow out also will encapsulate.
Embodiment 2
Be with embodiment 1 difference, before coating, on plus plate current-collecting body and negative current collector, offer punching earlier; And then carry out follow-up coating, cold pressing and itemize operation; The punching of both positive and negative polarity, barrier film be shaped as rectangle, the length of rectangle is 10mm, wide is 5mm.Not punching of encapsulating film, other operations have rectangular indentation with embodiment 1 on the lithium-ion electric pool side that makes, and be as shown in Figure 2.
Embodiment 3
Be with embodiment 2 differences, type of the being shaped as arc of positive plate punching, negative plate punching, barrier film punching, not punching of encapsulating film, other operations have arc notch with embodiment 2 on the angle of the lithium ion battery that makes, and are as shown in Figure 3.
Embodiment 4
Be that with embodiment 1 difference the positive plate punching hole diameter is 1mm, the negative plate punching hole diameter is 0.5mm, not punching of barrier film, and not punching of encapsulating film, other operations are with embodiment 1, and the lithium ion battery that makes has the structure of local dent, and is as shown in Figure 4.
Embodiment 5
Be that with embodiment 1 difference the punching on the encapsulating film is carried out die-cut obtaining after encapsulation, other operations are with embodiment 1.
Need to prove that except the listed shape of the foregoing description, the shape of punching can also be the figure of similar round, rectangle, triangle, closed arbitrarily or non-closure such as trapezoidal;
The lithium ion battery of Comparative Examples and embodiment 1 to 5 is carried out the internal resistance test, shown in the result be shown in table 1.
Lithium ion battery to Comparative Examples and embodiment 1 to 5 carries out the test of 0.5C discharge capacity, and the gained result is shown in table 2.
Lithium ion battery to Comparative Examples and embodiment 1 to 5 carries out normal temperature (23 ℃) loop test, record cycle-index, and calculated capacity conservation rate, and the gained result is shown in table 3.
The lithium ion battery of Comparative Examples and embodiment 1 to 5 is placed on deposit 60 days in 60 ℃ the environment after, the voltage of test lithium ion battery, the result is shown in table 4.
Table 1 lithium ion battery internal resistance data
| Internal resistance (milliohm) | Comparative Examples | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 |
| Sample 1 | 60 | ?58 | 58 | ?60 | ?58 | ?60 |
| Sample 2 | 65 | ?60 | 59 | ?58 | ?58 | ?59 |
| Sample 3 | 64 | ?60 | 58 | ?58 | ?59 | ?58 |
| Sample 4 | 66 | ?59 | 60 | ?60 | ?60 | ?59 |
| Sample 5 | 59 | ?58 | 59 | ?59 | ?59 | ?58 |
| Mean value | 62.8 | ?59 | 58.8 | ?59 | ?58.8 | ?58.8 |
Table 2 lithium ion battery 0.5C discharge capacity data
| Capacity (mAh) | Comparative Examples | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 |
| Sample 1 | 1000 | 1005 | 1003 | 1002 | 1005 | 1000 |
| Sample 2 | 990 | 1004 | 1005 | 1004 | 1001 | 1004 |
| Sample 3 | 998 | 1003 | 1006 | 1006 | 1000 | 1005 |
| Sample 4 | 1004 | 1004 | 1003 | 1001 | 1002 | 1000 |
| Sample 5 | 995 | 1000 | 1002 | 1000 | 1005 | 1000 |
| Mean value | 997.4 | 1003.2 | 1003.8 | 1002.6 | 1002.6 | 1001.8 |
Table 3 normal temperature loop-around data
| The test sequence number | Circulating temperature ℃ | The charge/discharge multiplying power | The charge and discharge cycles number of times | Capability retention |
| Comparative Examples | 23 | 1C/1C | 600 | 75.3％ |
| Embodiment 1 | 23 | 1C/1C | 600 | 88.1％ |
| Embodiment 2 | 23 | 1C/1C | 600 | 87.4％ |
| Embodiment 3 | 23 | 1C/1C | 600 | 87.8％ |
| Embodiment 4 | 23 | 1C/1C | 600 | 85.6％ |
| Embodiment 5 | 23 | 1C/1C | 600 | 85.3％ |
Voltage after 60 ℃ in table 4 was deposited in following 60 days keeps data
Can find out referring to table 1, table 2, table 3 and table 4; Lithium ion battery of the present invention has promoted the absorption of pole piece to electrolyte because increased the passage that electrolyte absorbs, and has improved the infiltration of electrolyte to pole piece; The internal resistance of battery obviously reduces, and consistency is greatly improved.The discharge capacity consistency of battery 0.5C has clear improvement, and the capacity of battery increases.Because electrolyte improves the infiltration of pole piece, so the lithium ion battery that utilizes the present invention to make has clear improvement on cycle performance.Normal temperature 1C discharges and recharges, and through 600 circulation back capability retentions 85.3～88.1%, exceeds 10% than the capability retention of traditional lithium ion battery, has improved the useful life of lithium ion battery greatly, has reduced terminal use's use cost.From the data that table 4 lithium ion battery high temperature is deposited, can find out; Lithium ion battery of the present invention aspect the voltage maintenance with traditional secondary battery indifference almost, can guarantee that the present invention still has the low advantage of traditional lithium ion battery pressure drop under the situation of alteration of form.
Need to prove that according to the announcement and the elaboration of above-mentioned specification, those skilled in the art in the invention can also change and revise above-mentioned execution mode.Therefore, the embodiment that discloses and describe above the present invention is not limited to also should be in the protection range of claim of the present invention to equivalent modifications more of the present invention and change.In addition, although used some specific terms in this specification, these terms are explanation for ease just, the present invention is not constituted any restriction.
Claims (10)
1. special-shaped lithium ion battery; Comprise positive plate, negative plate, barrier film and encapsulating film, it is characterized in that: offer the positive plate punching on the described positive plate, offer the negative plate punching on the negative plate; Offer the barrier film punching on the barrier film; With positive plate, barrier film and negative plate through reeling or after lamination technology processed electric core, the center of positive plate punching, negative plate punching and barrier film punching was all dropped on same the straight line, forms the breach that is communicated with.
2. special-shaped lithium ion battery according to claim 1 is characterized in that: said positive plate punching, negative plate punching and barrier film punching are opened in the central area or the marginal zone of electric core respectively.
3. special-shaped lithium ion battery according to claim 1 is characterized in that: circular, square, the triangle or trapezoidal of being shaped as of said positive plate punching, negative plate punching and barrier film punching.
4. special-shaped lithium ion battery according to claim 1 is characterized in that: said encapsulating film is provided with the encapsulating film punching, and the center of said encapsulating film punching and electric core punching is dropped on same the straight line.
5. special-shaped lithium ion battery according to claim 4 is characterized in that: the diameter of positive plate punching, negative plate punching, barrier film punching and encapsulating film punching or the length of side are more than or equal to 0.1 μ m.
6. the manufacturing approach of a special-shaped lithium ion battery is characterized in that, may further comprise the steps:
S1 offering positive plate punching and negative plate punching respectively through stirring, be coated with, cold pressing and divide on positive plate that cutting process makes and the negative plate, offers the barrier film punching on barrier film;
S2 processes electric core with the positive plate that offers punching respectively, negative plate and barrier film through coiling or lamination technology, and the center of positive plate punching, negative plate punching and barrier film punching is all dropped on same the straight line, forms the electric core punching that is communicated with;
S3, the electric core that will have punching is put into encapsulating film, and fluid injection encapsulates, changes into, makes special-shaped lithium ion battery behind the capacity.
7. the manufacturing approach of special-shaped lithium ion battery according to claim 6; It is characterized in that: among the S3 before the electric core that will have punching is put into encapsulating film; Earlier on encapsulating film, offer the encapsulating film punching, the center of encapsulating film punching and electric core punching is dropped on same the straight line.
8. the manufacturing approach of special-shaped lithium ion battery according to claim 6; It is characterized in that: on plus plate current-collecting body and negative current collector, offer positive plate punching and negative plate punching respectively before the painting process among the S1, and then be coated with, cold pressing and divide cutting process.
9. the manufacturing approach of special-shaped lithium ion battery according to claim 6 is characterized in that: circular, square, the triangle or trapezoidal of being shaped as of the punching of positive plate described in the S1, negative plate punching and barrier film punching.
10. the manufacturing approach of special-shaped lithium ion battery according to claim 7, it is characterized in that: the diameter of positive plate punching, negative plate punching, barrier film punching and encapsulating film punching or the length of side are more than or equal to 0.1 μ m.
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| CN108270028A (en) * | 2018-01-08 | 2018-07-10 | 广州鹏辉能源科技股份有限公司 | Annular battery core and preparation method and application, annular battery and preparation method and application, annular battery assembly and application |
| CN108493395A (en) * | 2018-03-22 | 2018-09-04 | 天津市捷威动力工业有限公司 | One kind having pore electrod structure soft bag lithium ionic cell |
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| CN109659493A (en) * | 2018-12-26 | 2019-04-19 | 国联汽车动力电池研究院有限责任公司 | It is a kind of comprising solid electrolyte, low porosity cathode and application the cathode lithium battery |
| CN111244392A (en) * | 2020-01-22 | 2020-06-05 | 苏州易来科得科技有限公司 | Thick electrode plate capable of improving lithium ion transport capacity and preparation method thereof |
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| WO2022205922A1 (en) * | 2021-03-30 | 2022-10-06 | 天津力神电池股份有限公司 | Soft-pack lithium-ion battery having high energy density |
| CN116231103A (en) * | 2023-03-03 | 2023-06-06 | 深圳市神通天下科技有限公司 | Laminated lithium ion battery and preparation method thereof |
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| CN104659384A (en) * | 2013-11-18 | 2015-05-27 | 中国电子科技集团公司第十八研究所 | Preparation method of large-capacity power-type lithium-ferrous disulfide (Li-FeS2) battery pack |
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| CN108270028A (en) * | 2018-01-08 | 2018-07-10 | 广州鹏辉能源科技股份有限公司 | Annular battery core and preparation method and application, annular battery and preparation method and application, annular battery assembly and application |
| CN108493395A (en) * | 2018-03-22 | 2018-09-04 | 天津市捷威动力工业有限公司 | One kind having pore electrod structure soft bag lithium ionic cell |
| CN109167015A (en) * | 2018-08-23 | 2019-01-08 | 河南创力新能源科技股份有限公司 | A kind of accumulator plate and the polar plate group using the pole plate |
| CN109286037A (en) * | 2018-11-23 | 2019-01-29 | 曙鹏科技（深圳）有限公司 | A kind of soft bag lithium ionic cell and its manufacture craft |
| CN109659493A (en) * | 2018-12-26 | 2019-04-19 | 国联汽车动力电池研究院有限责任公司 | It is a kind of comprising solid electrolyte, low porosity cathode and application the cathode lithium battery |
| CN111244392A (en) * | 2020-01-22 | 2020-06-05 | 苏州易来科得科技有限公司 | Thick electrode plate capable of improving lithium ion transport capacity and preparation method thereof |
| WO2021147409A1 (en) * | 2020-01-22 | 2021-07-29 | 苏州易来科得科技有限公司 | Thick electrode component and manufacturing method for thick electrode tabs |
| WO2022205922A1 (en) * | 2021-03-30 | 2022-10-06 | 天津力神电池股份有限公司 | Soft-pack lithium-ion battery having high energy density |
| CN113422113A (en) * | 2021-06-04 | 2021-09-21 | 深圳赛骄阳能源科技股份有限公司 | Method for manufacturing special-shaped lithium ion battery |
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