CN103427091A - Pole core, lithium ion battery, manufacturing method for the pole core and manufacturing method for the lithium ion battery - Google Patents
Pole core, lithium ion battery, manufacturing method for the pole core and manufacturing method for the lithium ion battery Download PDFInfo
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- CN103427091A CN103427091A CN2012101595053A CN201210159505A CN103427091A CN 103427091 A CN103427091 A CN 103427091A CN 2012101595053 A CN2012101595053 A CN 2012101595053A CN 201210159505 A CN201210159505 A CN 201210159505A CN 103427091 A CN103427091 A CN 103427091A
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention discloses a pole core of a lithium ion battery, the lithium ion battery, a manufacturing method for the pole core of the lithium ion battery and a manufacturing method for the lithium ion battery. The pole core of the lithium ion battery comprises an anode, a cathode and an isolating membrane. The isolating membrane is disposed between the anode and the cathode and used for isolating the anode and the cathode. The pole core is characterized in that the anode comprises an anode current collector and an anode active material, the anode current collector is provided with holes, the anode active material is filled in the holes of the anode current collector, the cathode comprises a cathode current collector and a cathode active material, the cathode current collector is provided with holes, and the cathode active material is filled in the holes of the cathode current collector. Accordingly, the thickness of a layer of the pole core in the lithium ion battery can be reduced in the case of maintaining the active compound content unchanged in each layer pole core of the battery, thus reducing the thickness of the whole battery in the end.
Description
Technical field
The present invention relates to technical field of electrochemistry, more specifically, the present invention relates to a kind of manufacture method of pole piece of pole piece, lithium ion battery, lithium ion battery of lithium ion battery and the manufacture method of lithium ion battery.
Background technology
Along with the development of computer technology and network technology, in recent years, the portable electric appts such as notebook, panel computer (PAD), mobile phone, multimedia player, PDA(Personal Digital Assistant) is universal all the more.In this process, lithium ion battery is high with its discharge voltage, energy density is large and the advantage of service life cycle length, becomes gradually the first-selected energy of these electronic equipments.
As a kind of electrochemical energy storing device, the core component of this lithium ion battery is the Battery Pole Core that contains electrochemical active material and usually have sandwich construction.In every one deck structure, described pole piece comprises: positive pole, negative pole and barrier film.Wherein, the utmost point that electrochemical potential is high is referred to as positive pole, also be referred to as anode, and the low utmost point of electrochemical potential is referred to as negative pole, also is referred to as negative electrode, and described barrier film is arranged between described positive pole and described negative pole, to play the effect of isolation.
In the prior art, this negative or positive electrode is made by following step: adhesive and conductive agent are dispersed in organic solution; By the negative or positive electrode active material is added in above-mentioned organic solution and makes slurry; And be coated on collector by this slurry and dry the collector be coated with after carrying out, usually, this collector is formed by metal forming.In the conventional negative or positive electrode prepared by as above technique, only have the both positive and negative polarity active material to be only the active material that the capacity to battery works, and metal forming and barrier film are all auxiliary member, to battery, be inert substance, can not produce on the capacity of battery any impact.
Current portable electric appts all requires its battery not only to want stand-by time long, and lighter and thinner.Yet, because be subject to the impact of manufacture craft and cycle life etc., in every one deck structure of Lithium-Ion Battery Core, the active material part can not be blocked up, not so, active material just easily comes off from collector, thereby causes not only can not improving battery capacity, can cause on the contrary volume lowering and life-span greatly to shorten.Therefore, if increase battery capacity, can not pass through to increase the thickness of active material in same layer, and can only realize by the total number of plies that increases Battery Pole Core.
Yet, certainly will cause like this thickness of lithium ion battery to increase and the weight increase, thereby further cause the portability of electronic equipment to descend, reduced user's experience.
Summary of the invention
In order to solve the problems of the technologies described above, according to an aspect of the present invention, a kind of pole piece of lithium ion battery is provided, described pole piece comprises: positive pole, negative pole and barrier film, described barrier film is arranged between described positive pole and described negative pole and for isolating described positive pole and described negative pole, it is characterized in that, described positive pole comprises: plus plate current-collecting body and positive electrode active materials, described plus plate current-collecting body has hole, described positive electrode active materials is filled in the hole of described plus plate current-collecting body, and described negative pole comprises: negative current collector and negative active core-shell material, described negative current collector has hole, described negative active core-shell material is filled in the hole of described negative current collector.
Preferably, in one embodiment, described positive electrode active materials can be coated in the side that described plus plate current-collecting body closes on described barrier film, a side that makes described positive electrode active materials close on described barrier film from described plus plate current-collecting body is filled into the hole of described plus plate current-collecting body, and described negative active core-shell material can be coated in the side that described negative current collector closes on described barrier film, a side that makes described negative active core-shell material close on described barrier film from described negative current collector is filled into the hole of described negative current collector.
Preferably, in one embodiment, described plus plate current-collecting body and described negative current collector can form by porous material.
Preferably, in one embodiment, described porous material can be aluminium-celmet.
In addition, according to a further aspect in the invention, a kind of lithium ion battery is provided, described lithium ion battery comprises: housing, pole piece and electrolyte, described housing is for holding hermetically described pole piece and described electrolyte, described pole piece comprises: positive pole, negative pole and barrier film, described barrier film is arranged between described positive pole and described negative pole and for isolating described positive pole and described negative pole, it is characterized in that, described positive pole comprises: plus plate current-collecting body and positive electrode active materials, described plus plate current-collecting body has hole, described positive electrode active materials is filled in the hole of described plus plate current-collecting body, and described negative pole comprises: negative current collector and negative active core-shell material, described negative current collector has hole, described negative active core-shell material is filled in the hole of described negative current collector.
According to another aspect of the invention, provide a kind of manufacture method of pole piece of lithium ion battery, it is characterized in that, described manufacture method comprises: form the plus plate current-collecting body with hole and the negative current collector with hole; By in the hole that positive electrode active materials is filled into to described plus plate current-collecting body, forming positive pole; By in the hole that negative active core-shell material is filled into to described negative current collector, forming negative pole; And between described positive pole and described negative pole, arrange for isolating the barrier film of described positive pole and described negative pole.
According to another aspect of the invention, a kind of manufacture method of lithium ion battery is provided, it is characterized in that, described manufacture method comprises: have the plus plate current-collecting body in hole and positive electrode active materials be filled in the hole of described plus plate current-collecting body by formation, forming positive pole; There is the negative current collector in hole and negative active core-shell material be filled in the hole of described negative current collector by formation, forming negative pole; Positive pole, barrier film and negative pole are reeled and formed pole piece; Described pole piece is placed in housing; To the housing filling electrolyte; And described housing is sealed.
Compared with prior art, employing is according to the pole piece of lithium ion battery of the present invention, due to active material fully is filled in the collector of porous, so on the one hand, can in the situation that in remaining on every layer activity substance content constant, reduce the thickness of battery one deck pole piece; On the other hand, can be in the situation that keep pole piece thickness constant, increase significantly wherein the content of the active material that the capacity to battery works.
And, owing to adopting porous mass to realize the both positive and negative polarity collector in the pole piece according to lithium ion battery of the present invention, so the quality of this collector is for example, more than the quality of traditional collector (, Copper Foil and aluminium foil) light.
In addition, due in the pole piece according to lithium ion battery of the present invention by the active material partial fusion in collector, cause active material to be combined with collector tightr, and be not easy to come off, so compared with prior art, the present invention not only can not affect the life-span of battery, but also will be conducive to the raising of battery life, thereby has fully met the requirement of consumer electronics product to battery.
Other features and advantages of the present invention will be set forth in the following description, and, partly from specification, become apparent, or understand by implementing the present invention.Purpose of the present invention and other advantages can realize and obtain by specifically noted structure in specification, claims and accompanying drawing.
The accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms the part of specification, for explaining the present invention, is not construed as limiting the invention together with embodiments of the present invention.In the accompanying drawings:
Fig. 1 illustrates the structure of one deck pole piece in lithium ion battery of the prior art.
Fig. 2 illustrates the structure according to one deck pole piece in lithium ion battery of the present invention.
Fig. 3 illustrates the structure according to lithium ion battery of the present invention.
Fig. 4 illustrates the manufacture method according to the pole piece of lithium ion battery of the present invention.
Fig. 5 illustrates the manufacture method according to the pole piece of lithium ion battery of the present invention.
Embodiment
Describe in detail with reference to the accompanying drawings according to each embodiment of the present invention.Here, it should be noted that in the accompanying drawings, identical Reference numeral is given and basically had part identical or similar structures and function, and will omit being repeated in this description about them.
Below, the pole piece of lithium ion battery of the prior art is described with reference to Fig. 1.
Fig. 1 illustrates the structure of one deck pole piece 100 in lithium ion battery of the prior art.
As described in the background technology part, in the prior art, the capacity that increases lithium ion battery is the conflict body with the weight that reduces it and its thickness of minimizing.
For example, the lithium ion battery that the capacity of take is 3.3 millimeters (mm) as 3700 MAHs (mAh), thickness is example, comprises the Battery Pole Core that generally at least has 13 layers of structure in its inside, and wherein the structure of every one deck pole piece is as illustrated in Fig. 1.
Referring to Fig. 1, the pole piece 100 of this battery comprises: as the aluminium foil 101 of plus plate current-collecting body, its thickness is approximately 0.015mm; Positive electrode active materials 103, its thickness is approximately 0.090mm; The first barrier film 105, for positive electrode active materials 103 and negative active core-shell material 107 are separated, its thickness is approximately 0.016mm; Negative active core-shell material 107, its thickness is approximately 0.095mm; As the Copper Foil 109 of negative current collector, its thickness is approximately 0.010mm; And second barrier film 111, for the negative current collector 109 by this layer and the plus plate current-collecting body in lower one deck, separating, its thickness is approximately 0.016mm.
As can be seen here, every layer of gross thickness of Battery Pole Core 100 is about:
0.015+0.090+0.016+0.095+0.010+0.016=0.242mm。
Yet, wherein only have both positive and negative polarity active material 103 and 107 to be only active material, could the capacity of battery be worked, and as aluminium foil 101, Copper Foil 109 and barrier film 105 and 111 be all auxiliary member, to battery, be inert substance.
Therefore, in one deck Battery Pole Core that is 0.242mm in gross thickness, the thickness of active material only is about:
0.090+0.095=0.185mm，
That is, the occupied effective thickness of active material only is about:
0.185/0.242=76.4%。
As described as the background technology part, in the prior art, if increase the capacity of battery, can only increase the number of plies of battery, and can not increase the thickness of active material in same layer, in same layer, the thickness maximum of active material can only be 0.185mm.Otherwise, when the thickness of active material exceeds 0.185mm, this negative or positive electrode active material easily breaks away from from the negative or positive electrode collector, cause battery to damage or performance degradation.
Simultaneously, if battery needs loss of weight or subtracts thick attenuation,, in traditional structure, can only reduce the amount of active material, this just causes battery capacity greatly to reduce, and effective thick end further reduces.
Yet, current consumer electronics product (such as, notebook computer etc.) all require battery not only to want stand-by time long, and also lighter and thinner.Yet known by above-mentioned analysis, in the prior art, aluminium foil, Copper Foil etc. all can't attenuation, if the battery attenuation, can only reduce the thickness of active material, certainly will have a strong impact on like this capacity of battery.And active material also can't be very little, otherwise battery will lose the meaning existed as power supply energy.
For this problem, the inventor has proposed following conception, utilizes advanced porous material to substitute traditional Copper Foil and the aluminium foil collector as battery, and adopts novel manufacturing process, and redesign is different from the new construction of conventional batteries.
Hereinafter, with reference to Fig. 2, the pole piece according to lithium ion battery of the present invention is described.
Fig. 2 illustrates the structure according to one deck pole piece 200 in lithium ion battery of the present invention.
As illustrated in Figure 2, according to the pole piece 200 of battery of the present invention, comprise: positive pole 210, negative pole 230 and barrier film.
Described anodal 210 comprise: plus plate current-collecting body 201 and positive electrode active materials 203.Wherein, described plus plate current-collecting body 201 has hole, and described positive electrode active materials 203 is filled in the hole of described plus plate current-collecting body 201.
Described negative pole 230 comprises: negative current collector 209 and negative active core-shell material 207.Wherein, described negative current collector 209 has hole, and described negative active core-shell material 207 is filled in the hole of described negative current collector 209.
Described barrier film is the first barrier film 205, this first barrier film 205 be arranged in described anodal 210 and described negative pole 230 between and for isolating described anodal 210 and described negative pole 230.
In addition, according to the pole piece 200 of battery of the present invention, also comprise: the second barrier film 211, this second barrier film 211 is arranged between the negative current collector 209 and the plus plate current-collecting body in lower one deck in this layer, and for they are separated.
Fig. 1 and 2 is known in contrast, in the present invention, by porous material, substitutes traditional Copper Foil and aluminium foil forms described plus plate current-collecting body 201 and described negative current collector 209.
And, forming during whole anodal 210, positive electrode active materials 203 is coated in to the side that described plus plate current-collecting body 201 closes on described the first barrier film 205, and a side that makes described positive electrode active materials 203 to close on described the first barrier film 205 from described plus plate current-collecting body 201 is filled into the hole of described plus plate current-collecting body 201.
In like manner, forming during whole anodal 210, negative active core-shell material 207 is coated in to the side that described negative current collector 209 closes on described the first barrier film 205, and a side that makes described negative active core-shell material 207 to close on described the first barrier film 205 from described negative current collector 209 is filled into the hole of described negative current collector 209.
Thereby, in the present invention, positive electrode active materials 203 and negative active core-shell material 207 are no longer only to be coated on the surface of a side of described the first barrier film 205 of closing on of plus plate current-collecting body 201 and negative current collector 209, but further be filled in plus plate current-collecting body 201 and negative current collector 209, and preferably among them, distribute equably, steady to guarantee, reliable power supply performance.
As can be seen here, adopt the pole piece according to lithium ion battery of the present invention, due to active material fully is filled in the collector of porous, so on the one hand, can in the situation that in remaining on every layer activity substance content constant, reduce the thickness of battery one deck pole piece.The test data of experiment shows: compared with prior art, in the present invention, the thickness of one deck battery at least reduces by 40%, and conduct is by 13 layers of battery formed equally, and the integral thickness of this battery is much smaller than 3mm.On the other hand, can be in the situation that keep pole piece thickness constant, increase significantly wherein the content of the active material that the capacity to battery works.
And, owing to adopting porous mass to realize the both positive and negative polarity collector in the pole piece according to lithium ion battery of the present invention, so the quality of this collector is light more than the quality of traditional collector (Copper Foil and aluminium foil).According to measuring and calculating, in traditional structure as shown in Figure 1, the quality of Copper Foil and aluminium foil is about 13g, account for 20% of battery gross mass, and in structure of the present invention as shown in Figure 2, the quality of the collector of employing porous mass is lower than 3g, and the ratio that accounts for the battery gross mass will be reduced to below 5%, and and then make the battery gross mass also will reduce more than 20%.
In addition, due in the pole piece according to lithium ion battery of the present invention by the active material partial fusion in collector, cause active material to be combined with collector tightr, and be not easy to come off, so compared with prior art, the present invention not only can not affect the life-span of battery, but also will be conducive to the raising of battery life, thereby has fully met the requirement of consumer electronics product to battery.
Particularly, in one example, according to porous material of the present invention, can be the Celmet porous material.This Celmet is a kind of porous type metal that is derived from nickel or nichrome.It removes the techniques such as plastic foam and is made by foamed plastics conductive coating, nickel plating, heat treatment, possess highly porous (volume ratio of hole in whole material reaches as high as 98%) that outclass non-woven metal fabric, foam metal.Simultaneously, it also has three dimensional network structure, is full of interconnection, open, spherical micropore.In addition, it also is very easy to carry out processing in shape by modes such as cutting, punching presses.
According to these characteristics of Celmet, the inventor is used for it to arrange in pairs or groups a kind of active material with the collection of carrying out electric current and maintains, and is used as plus plate current-collecting body 201 and negative current collector 209 in lithium ion battery according to the present invention.
More preferably, in another example, this porous material can be " Aluminum-Celmet(writes again Al-Celmet, or aluminium-Celmet) " porous material.Except the porousness advantage that possesses Celmet, this Al-Celmet also has the characteristics such as extremely-low density (only have nickel 1/3rd), superelevation conductivity (resistance less than nickel half) and superelevation corrosion resistance, thereby, more suitable it is used in lithium ion or other battery that need to frequently discharge and recharge.
Hereinafter, with reference to Fig. 3, describe according to lithium ion battery of the present invention.
Fig. 3 illustrates the structure according to lithium ion battery of the present invention.
As illustrated as Fig. 3, lithium ion battery according to the present invention comprises: housing 301, pole piece 303 and electrolyte (not shown).
Described housing 301 is for holding hermetically described pole piece 303 and described electrolyte.
Described pole piece 303 comprises: positive pole, negative pole and barrier film, positive pole, barrier film and negative pole are wound and form this pole piece with sandwich construction.One deck structure of this pole piece has been carried out detailed explanation with reference to figure 2 hereinbefore, and thereby the descriptions thereof are omitted at this.
In addition, according to lithium ion battery of the present invention, can also comprise: positive terminal 305 and negative terminal 307, be connected with negative pole with the positive pole in described pole piece 303 respectively, and be connected for the electronic equipment with outside, to this electronic equipment, to provide supply of electric power.
Hereinafter, with reference to Fig. 4, the manufacture method according to the pole piece of lithium ion battery of the present invention is described.
Fig. 4 illustrates the manufacture method according to the pole piece of lithium ion battery of the present invention.Particularly, described manufacture method comprises:
In step S401, form the plus plate current-collecting body with hole and the negative current collector with hole.
Particularly, for example adopt Celmet porous material or Al-Celmet to form described plus plate current-collecting body and described negative current collector.
In step S402, by the hole that positive electrode active materials is filled into to described plus plate current-collecting body, forming positive pole.
Particularly, described positive electrode active materials is coated in to the side that described plus plate current-collecting body closes on described barrier film, a side that makes described positive electrode active materials close on described barrier film from described plus plate current-collecting body is filled into the hole of described plus plate current-collecting body.
In step S403, by the hole that negative active core-shell material is filled into to described negative current collector, forming negative pole.
Particularly, described negative active core-shell material is coated in to the side that described negative current collector closes on described barrier film, a side that makes described negative active core-shell material close on described barrier film from described negative current collector is filled into the hole of described negative current collector.
In step S404, between described positive pole and described negative pole, arrange for isolating the barrier film of described positive pole and described negative pole.
Particularly, between both positive and negative polarity, fully isolate, to prevent from causing due to any short circuit of generation the damage of battery or even whole electronic equipment.
Hereinafter, with reference to Fig. 5, the manufacture method according to lithium ion battery of the present invention is described.
Fig. 5 illustrates the manufacture method according to the pole piece of lithium ion battery of the present invention.Particularly, described manufacture method comprises:
In step S501, there is the plus plate current-collecting body in hole and positive electrode active materials be filled in the hole of described plus plate current-collecting body by formation, form positive pole.
In step S502, there is the negative current collector in hole and negative active core-shell material be filled in the hole of described negative current collector by formation, form negative pole.
This step S501 and S502 have carried out detailed explanation with reference to figure 1-4 hereinbefore, and thereby the descriptions thereof are omitted at this.
In step S503, positive pole, barrier film and negative pole are reeled and formed pole piece.
Particularly, according to the needed battery capacity of electronic equipment and the battery size limited, above-mentioned tabular both positive and negative polarity is reeled, the pole piece that there is multilayer (for example, 13 layers) structure with formation.
In step S504, described pole piece is placed in housing.
Particularly, the pole piece of the formation of for example reeling in step S503 is placed on the core of housing, so that housing plays the effect of protection and sealing to this pole piece and other fillers.
In step S505, to the housing filling electrolyte.
Particularly, according to pole piece of the present invention, can together with liquid electrolyte, use.Preferably use any electronics and ion conductive material with electrochemical stability, be used as this liquid electrolyte.
In step S506, described housing is sealed.
Particularly, finally, after completing above-mentioned operations, described object is sealed, thereby produced according to battery of the present invention, with for various electronic equipments.
As can be seen here, employing, according to the manufacture method of the pole piece of lithium ion battery of the present invention and the manufacture method of lithium ion battery, can design according to demand battery structure, technique and each several part and form; According to this, design to calculate and the various components of early-stage preparations; Prepare or purchase satisfactory special porous mass, preparing the cell active materials slurry, and carrying out the preparation of other auxiliaries; Thereby complete the special process preparation according to the illustrated above-mentioned steps of Fig. 5, to produce the frivolous high capacity cell of finished product.
Describe each embodiment of the present invention in the above in detail.Yet, it should be appreciated by those skilled in the art that without departing from the principles and spirit of the present invention, can carry out various modifications to these embodiment, combination or sub-portfolio, and such modification should fall within the scope of the present invention.
Claims (16)
1. the pole piece of a lithium ion battery, described pole piece comprises: anodal, negative pole and barrier film, described barrier film is arranged between described positive pole and described negative pole and, for isolating described positive pole and described negative pole, it is characterized in that,
Described positive pole comprises: plus plate current-collecting body and positive electrode active materials, and described plus plate current-collecting body has hole, and described positive electrode active materials is filled in the hole of described plus plate current-collecting body, and
Described negative pole comprises: negative current collector and negative active core-shell material, and described negative current collector has hole, and described negative active core-shell material is filled in the hole of described negative current collector.
2. according to the pole piece of claim 1, it is characterized in that,
Described positive electrode active materials is coated in the side that described plus plate current-collecting body closes on described barrier film, and a side that makes described positive electrode active materials close on described barrier film from described plus plate current-collecting body is filled into the hole of described plus plate current-collecting body, and
Described negative active core-shell material is coated in the side that described negative current collector closes on described barrier film, and a side that makes described negative active core-shell material close on described barrier film from described negative current collector is filled into the hole of described negative current collector.
3. according to the pole piece of claim 1, it is characterized in that, described plus plate current-collecting body and described negative current collector form by porous material.
4. according to the pole piece of claim 3, it is characterized in that, described porous material is aluminium-celmet.
5. a lithium ion battery, described lithium ion battery comprises: housing, pole piece and electrolyte, described housing is for holding hermetically described pole piece and described electrolyte, described pole piece comprises: positive pole, negative pole and barrier film, described barrier film is arranged between described positive pole and described negative pole and for isolating described positive pole and described negative pole, it is characterized in that
Described positive pole comprises: plus plate current-collecting body and positive electrode active materials, and described plus plate current-collecting body has hole, and described positive electrode active materials is filled in the hole of described plus plate current-collecting body, and
Described negative pole comprises: negative current collector and negative active core-shell material, and described negative current collector has hole, and described negative active core-shell material is filled in the hole of described negative current collector.
6. according to the lithium ion battery of claim 5, it is characterized in that,
Described positive electrode active materials is coated in the side that described plus plate current-collecting body closes on described barrier film, and a side that makes described positive electrode active materials close on described barrier film from described plus plate current-collecting body is filled into the hole of described plus plate current-collecting body, and
Described negative active core-shell material is coated in the side that described negative current collector closes on described barrier film, and a side that makes described negative active core-shell material close on described barrier film from described negative current collector is filled into the hole of described negative current collector.
7. according to the lithium ion battery of claim 5, it is characterized in that, described plus plate current-collecting body and described negative current collector form by porous material.
8. according to the lithium ion battery of claim 7, it is characterized in that, described porous material is aluminium-celmet.
9. the manufacture method of the pole piece of a lithium ion battery, is characterized in that, described manufacture method comprises:
Formation has the plus plate current-collecting body in hole and has the negative current collector in hole;
By in the hole that positive electrode active materials is filled into to described plus plate current-collecting body, forming positive pole;
By in the hole that negative active core-shell material is filled into to described negative current collector, forming negative pole; And
Between described positive pole and described negative pole, arrange for isolating the barrier film of described positive pole and described negative pole.
10. according to the manufacture method of claim 9, it is characterized in that,
Step in the described hole that positive electrode active materials is filled into to described plus plate current-collecting body comprises:
Described positive electrode active materials is coated in to the side that described plus plate current-collecting body closes on described barrier film, and a side that makes described positive electrode active materials close on described barrier film from described plus plate current-collecting body is filled into the hole of described plus plate current-collecting body, and
Step in the described hole that negative active core-shell material is filled into to described negative current collector comprises:
Described negative active core-shell material is coated in to the side that described negative current collector closes on described barrier film, and a side that makes described negative active core-shell material close on described barrier film from described negative current collector is filled into the hole of described negative current collector.
11. the manufacture method according to claim 9, is characterized in that, the plus plate current-collecting body that described formation has hole comprises with the step with the negative current collector in hole:
Form described plus plate current-collecting body and described negative current collector by porous material.
12. the manufacture method according to claim 11, is characterized in that, described porous material is aluminium-celmet.
13. the manufacture method of a lithium ion battery, is characterized in that, described manufacture method comprises:
There is the plus plate current-collecting body in hole and positive electrode active materials be filled in the hole of described plus plate current-collecting body by formation, forming positive pole;
There is the negative current collector in hole and negative active core-shell material be filled in the hole of described negative current collector by formation, forming negative pole;
Positive pole, barrier film and negative pole are reeled and formed pole piece;
Described pole piece is placed in housing;
To the housing filling electrolyte; And
Described housing is sealed.
14. the manufacture method according to claim 13, is characterized in that,
Step in the described hole that positive electrode active materials is filled into to described plus plate current-collecting body comprises:
Described positive electrode active materials is coated in to the side that described plus plate current-collecting body closes on described barrier film, and a side that makes described positive electrode active materials close on described barrier film from described plus plate current-collecting body is filled into the hole of described plus plate current-collecting body, and
Step in the described hole that negative active core-shell material is filled into to described negative current collector comprises:
Described negative active core-shell material is coated in to the side that described negative current collector closes on described barrier film, and a side that makes described negative active core-shell material close on described barrier film from described negative current collector is filled into the hole of described negative current collector.
15. the manufacture method according to claim 13, is characterized in that,
The step that described formation has the plus plate current-collecting body in hole comprises:
Form described plus plate current-collecting body by porous material, and
The step that described formation has the negative current collector in hole comprises:
Form described negative current collector by porous material.
16. the manufacture method according to claim 15, is characterized in that, described porous material is aluminium-celmet.
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| CN2012101595053A CN103427091A (en) | 2012-05-21 | 2012-05-21 | Pole core, lithium ion battery, manufacturing method for the pole core and manufacturing method for the lithium ion battery |
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| CN2012101595053A CN103427091A (en) | 2012-05-21 | 2012-05-21 | Pole core, lithium ion battery, manufacturing method for the pole core and manufacturing method for the lithium ion battery |
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| CN105406128A (en) * | 2014-08-26 | 2016-03-16 | 联想(北京)有限公司 | Battery and electronic device |
| CN109952669A (en) * | 2017-04-06 | 2019-06-28 | 株式会社Lg化学 | The manufacturing method of lithium secondary battery |
| CN114144904A (en) * | 2020-05-14 | 2022-03-04 | 株式会社Lg新能源 | Electrode assembly having enhanced safety and lithium secondary battery comprising the same |
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| CN201741765U (en) * | 2010-06-30 | 2011-02-09 | 南京双登科技发展研究院有限公司 | Battery cell of power-type lithium ion battery |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105406128A (en) * | 2014-08-26 | 2016-03-16 | 联想(北京)有限公司 | Battery and electronic device |
| CN109952669A (en) * | 2017-04-06 | 2019-06-28 | 株式会社Lg化学 | The manufacturing method of lithium secondary battery |
| CN114144904A (en) * | 2020-05-14 | 2022-03-04 | 株式会社Lg新能源 | Electrode assembly having enhanced safety and lithium secondary battery comprising the same |
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