CN207353383U - Collector, electrode plates and lithium ion battery - Google Patents
Collector, electrode plates and lithium ion battery Download PDFInfo
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- CN207353383U CN207353383U CN201721501127.7U CN201721501127U CN207353383U CN 207353383 U CN207353383 U CN 207353383U CN 201721501127 U CN201721501127 U CN 201721501127U CN 207353383 U CN207353383 U CN 207353383U
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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
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Abstract
It the utility model is related to collector, electrode plates and lithium ion battery.The collector includes：Metal foil, the metal foil includes opposite first surface and second surface, first surface and second surface at least one include alternatively distributed first area and second area, first area is by the corrosion area of metal foil corrosionization processing formation, the area of first area accounts for the 33%~75% of the sum of first area and second area area, multiple holes are distributed with first area, and average pore size is 3 μm~20 μm；Priming coat, is formed at first surface and second surface at least one.Collector, electrode plates and lithium ion battery provided by the utility model can effectively and stably suppress battery core thermal runaway, improve battery core security performance, while have good electric property concurrently.
Description
Technical field
The utility model belongs to battery technology field, more particularly to a kind of collector, electrode plates and lithium ion battery.
Background technology
With the extensive use of lithium ion battery, its security performance is one of performance that consumer pays special attention to, also right and wrong
Normal scabrous problem.At present, the new process used in terms of lithium ion battery safety performance is coating protection on a current collector
Material protects collector, while can increase short-circuit resistance using the protected material bed of material, reduces short-circuit power, suppresses heat and loses
Control, so as to improve the security performance of lithium ion battery.
However, it is above-mentioned between collector and active material layer set the protected material bed of material technical solution, simply compared with
Extruding, shock, the probability that inside lithium ion cell short circuit is caused when being pierced through by sharp objects are reduced in big degree, however it remains
Cause the risk of battery core thermal runaway.
Utility model content
The utility model embodiment provides a kind of collector, electrode plates and lithium ion battery, can significantly increase bottom
Safeguard protection effect of the coating to collector, when extruding, hit, being pierced through by sharp objects, collector will not be with opposite electrode
Contact, so as to reduce battery core short circuit thermal, effectively and stably suppresses battery core thermal runaway, and improving lithium ion battery security
Good electric property is had concurrently while energy.
On the one hand the utility model embodiment provides a kind of collector, including：Metal foil, the metal foil include opposite
First surface and second surface, first surface and second surface at least one include alternatively distributed first area and the secondth area
Domain, first area are that the corrosion area of metal foil corrosionization processing formation, the area of first area are accounted for first area and second
Multiple holes are distributed with the 33%~75% of the sum of region area, first area, and average pore size is 3 μm~20 μm；Priming coat, forms
In first surface and second surface at least one.
The collector that the utility model embodiment provides, forms more in the progress local corrosion processing of the surface of metal foil
Pore structure region, on the one hand, so that the elongation of metal foil reduces, can reduce because sharp objects puncture the hair of battery formation
Thorn, and cause the elongation of surface priming coat to be more than the elongation of metal foil, when stretching, will not expose metal foil；The opposing party
Face, basecoat material can be penetrated into loose structure during primary coat so that have more preferable cohesive force between metal foil and priming coat；
Therefore, priming coat can preferably protect metal foil.By controlling the extent of corrosion and area of porous zone, make metal foil
Elongation, and the roughness of porous zone, average pore diameter, hole density, control in predetermined scope, electricity made of it
In core, the burr that drift bolt process is formed substantially reduces, and priming coat significantly increases the cohesive force of metal foil, so that priming coat
Play the role of safeguard protection to metal foil, metal foil will not opposite to that electrode contact, improve battery core short circuit thermal, heat production is notable
Reduce, so as to effectively and stably suppress battery core thermal runaway, 100% is tested by drift bolt.At the same time lithium ion can be ensured
The electric property of battery.
According to the one side of the utility model embodiment, the width of first area and second area in metal foil
On be alternately distributed.
According to the one side of the utility model embodiment, first area and second area are in bar shaped and along metal foil
Length direction extension；The centre position of first surface and/or second surface in the width direction is first area, this first
The both sides in region are distributed with second area；Alternatively, first surface and/or second surface include three the in the width direction
One region and two second areas alternate distribution.
According to the sum of the one side of the utility model embodiment, width of first area for second area width it
The 78%~300% of sum.
According to the one side of the utility model embodiment, the surface roughness of first area is 3 μm~10 μm.
According to the one side of the utility model embodiment, the hole density of first area is 100 hole/cm2~200
Hole/cm2。
According to the one side of the utility model embodiment, the ratio of the thickness of first area and the thickness of second area
For 25%~80%, the thickness of first area is 3 μm~12 μm.
According to the one side of the utility model embodiment, priming coat is formed on first area and/or second area,
The thickness of priming coat is 6 μm~9 μm.
On the other hand the utility model embodiment provides a kind of electrode plates, which includes being cascading
Collector and active material layer, wherein, collector be above-mentioned offer collector.
The another aspect of the utility model embodiment provides a kind of lithium ion battery, including：Cathode sheet, anode pole piece,
Isolation film and electrolyte, wherein, cathode sheet and/or the electrode plates that anode pole piece is above-mentioned offer.
Brief description of the drawings
, below will be in the utility model embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment
Required attached drawing is briefly described, it should be apparent that, drawings described below is only the one of the utility model
A little embodiments, for those of ordinary skill in the art, without creative efforts, can also be according to these
Attached drawing obtains other attached drawings.
Fig. 1 is a kind of structure diagram for collector that the utility model embodiment provides.
Fig. 2 is the structure diagram for another collector that the utility model embodiment provides.
Fig. 3 is a kind of structure diagram for electrode plates that the utility model embodiment provides.
Embodiment
In order to become apparent from the goal of the invention of the utility model, technical solution and advantageous effects, below in conjunction with reality
Example is applied the utility model is further elaborated.It should be appreciated that the embodiment described in this specification is only
In order to explain the utility model, it is not intended to limit the utility model.
For simplicity, some number ranges are only expressly disclosed herein.However, any lower limit can be with any upper limit group
Close the scope for being formed and being not known and recording；And any lower limit can form the scope for being not known and recording with other lower values, together
Any upper limit of sample can combine the scope to be formed and not yet explicitly recorded with any other upper limit.In addition, recorded although being not known, still
Each point or single number between endpoints of ranges are included in the range of this.Thus, each point or single number can be used as certainly
The lower limit or the upper limit of body, which combine with any other point or single number or combine to be formed with other lower limits or the upper limit, not yet explicitly to be recorded
Scope.
In description herein, it is necessary to explanation, unless otherwise indicated, " multiple " be meant that two or two with
On；Term " first " " second " should not be construed as the restriction to the utility model merely to the convenience of statement；Term " on ",
" under ", " interior ", the orientation of the instruction such as " outer " or position relationship be based on orientation shown in the drawings or position relationship, merely to just
In description and simplify description, rather than indicate or imply that signified device or element there must be specific orientation, with specific
Azimuth configuration and operation, therefore it is not intended that limitation to this paper.
In the description of the utility model, it is also necessary to explanation, unless otherwise clearly defined and limited, term " peace
Dress ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integratedly
Connection；It can be directly connected, can also be indirectly connected by intermediary.For the ordinary skill in the art,
Visual concrete condition understands concrete meaning of the above-mentioned term in the utility model.
The foregoing invention content of the utility model is not intended to each disclosed embodiment in description the utility model
Or every kind of implementation.It is described below to more particularly exemplify illustrative embodiments.Many places in entire chapter application, pass through
A series of embodiments provide guidance, these embodiments can use in a variety of combinations.In various embodiments, enumerate and only make
For representative group, it should not be construed as exhaustive.
Collector
Also referring to Fig. 1 and Fig. 2, according to the first aspect of the utility model embodiment, there is provided a kind of collector,
Including：Metal foil 11, the metal foil 11 include opposite first surface 111 and second surface 112, and first surface 111 includes handing over
First area 121 and second area 122 for distribution, first area 121 are by the corrosion of 11 corrosion processing formation of metal foil
Region, the area of first area 121 account for the 33%~75% of the sum of 122 area of first area 121 and second area, first area
121 are distributed with multiple holes, and average pore size is 3 μm~20 μm；Priming coat 12, is formed on first surface 111, and covers the firstth area
Domain 121 and second area 122.
Specifically, as a kind of example, as shown in Figure 1, collector includes metal foil 11, priming coat 12.
Metal foil 11 has predetermined length and width, and the length direction of metal foil 11 is the electrode plates that will be made of it
Curl into the direction of battery core.The first surface 111 of metal foil 11 includes 121 He of first area on its width X
Two second areas 122, and in the direction of the width, first area 121 are located at the center of first surface 111, two second
Region 122 is distributed in the both sides of first area 121, and first area 121 and second area 122 are in bar shaped and along metal foil 1
Length direction extends, wherein, first area 121 is by the corrosion area of 11 corrosion processing formation of metal foil, second area 122
For non-corrosive region.
The width W1 of said one first area 121 be the sum of the width of two second areas 122 (V1+V2) 78%~
300%, preferably 100%~150%.The thickness D2 of first area 121 is 3 μm~12 μm, the thickness with second area 122
The ratio of D1 is 25%~80%.Multiple holes are distributed with first area 121, and average pore size is 3 μm~20 μm, hole density 100
A hole/cm2~200 hole/cm2, the surface roughness of first area is 3 μm~10 μm.
Priming coat 12 is formed on the first surface 111 of metal foil 11, and covers first area 121 and second area 122.
The thickness of priming coat 12 is 6 μm~9 μm, it can be organic matter coating, can be securely bonded to very much in metal foil 11.Can be with
Understand, being also an option that property of priming coat is formed on the position corresponding with first area or second area of metal foil.
Metal foil 11 is aluminium foil.
As another example, as shown in Fig. 2, collector includes metal foil 11, priming coat 12.
Metal foil 11 has predetermined length and width, and the length direction of metal foil 11 is the electrode plates that will be made of it
Curl into the direction of battery core.The first surface 111 of metal foil 11 on its width X include three first areas 121 and
Two second areas 122, and on width X, three porous zones 121 and two non-multi bore regions 122 alternate point
Cloth, first area 121 and second area 122 extend in bar shaped and along the length direction of metal foil 1, wherein, first area 111
For by the corrosion area of 11 corrosion processing formation of metal foil, second area 112 is non-corrosive region.
The sum of width of above three first area 121 (W1+W2+W3) is the sum of the width of two second areas 122 (V1
+ V2) 78%~300%, preferably 100%~150%.The thickness D2 of first area 121 is 3 μm~12 μm, with second
The ratio of the thickness D1 in region 122 is 25%~80%.Multiple holes are distributed with first area 121, and average pore size is 3 μm~20 μ
M, hole density is 100 hole/cm2~200 hole/cm2, the surface roughness of first area 121 is 3 μm~10 μm.
Priming coat 2 is formed on the first surface 111 of metal foil 1, and covers first area 121 and second area 122.Bottom
The thickness of coating 12 is 6 μm~9 μm, it can be organic matter coating, can be securely bonded to very much in metal foil 1.It can manage
Solution, being also an option that property of priming coat are formed on the position corresponding with first area or second area of metal foil.
Metal foil 11 is aluminium foil.
The collector that the utility model embodiment provides, carries out local corrosion processing on the surface of metal foil 11 and is formed
Loose structure region, on the one hand, so that the elongation of metal foil 11 reduces, can reduce because sharp objects puncture battery formation
Burr, and cause the elongation of surface priming coat 12 to be more than the elongation of metal foil 11, when stretching, will not expose metal foil 11；
On the other hand, basecoat material can be penetrated into loose structure during primary coat so that had more between metal foil 11 and priming coat 12
Good cohesive force；Therefore, priming coat 12 can preferably protect metal foil 11.By the extent of corrosion in control corrosion rate region and
Area, makes the elongation of metal foil 11, and the surface roughness of corrosion area, average pore diameter, hole density, controls predetermined
In the range of, with its manufactured battery core, the burr that drift bolt process is formed substantially reduces, bonding of the priming coat 12 to metal foil 11
Power significantly increases, so that priming coat 12 plays the role of metal foil 11 safeguard protection, metal foil 11 will not opposite to that electricity
Pole contacts, and improves battery core short circuit thermal, and heat production substantially reduces, so as to effectively and stably suppress battery core thermal runaway, 100% passes through
Drift bolt is tested.At the same time the electric property of lithium ion battery can be ensured.
The manufacture method of collector
According to the second aspect of the utility model embodiment, there is provided a kind of manufacture method of collector, including：
S1, prepares corrosive aluminum foil, including：S101, by aluminium foil surface subregion covering protection film, to exposed region into
Row polishing pretreatment；S102, hair engaging aperture corrosion is carried out to the aluminium foil of pretreatment, and hair engaging aperture corrosive liquid is the sulfuric acid solution of 0.5mol/L,
Temperature is 35 DEG C~45 DEG C, time 6h；S103, then reaming corrosion is carried out, reaming corrosive liquid is the salpeter solution of 1mol/L, warm
Spend for 35 DEG C~45 DEG C, time 12h；S104, cleaning 2 times is carried out using the ethanol that purity is 100%；S105, at 80 DEG C
Dry 12h, obtains corrosive aluminum foil.S2, the protective film covered on corrosive aluminum foil is torn, by basecoat material coated on corrosion aluminium
On paper tinsel, drying, forms priming coat.
Electrode plates
Also referring to Fig. 3, according to the third aspect of the utility model embodiment, there is provided a kind of electrode plates, bag
Include the collector being cascading and active material layer.Collector includes：Metal foil 11, the metal foil 11 include opposite
First surface 111 and second surface 112, first surface 111 includes alternatively distributed first area 121 and second area 122,
First area 121 is that the corrosion area of 11 corrosion processing formation of metal foil, the area of first area 121 are accounted for first area
121 and the 33%~75% of the sum of 122 area of second area, first area 121 is distributed with multiple holes, average pore size for 3 μm~
20μm；Priming coat 12, is formed on first surface 111, and covers first area 121 and second area 122.Active material
Layer 13 is formed on priming coat 12.
Specifically, as a kind of example, as shown in figure 3, electrode plates include metal foil 11, priming coat 12, active material
Material layer 13.It is understood that metal foil 11 has predetermined length and width, the length direction of metal foil 11 is that will use it
The electrode plates of making curl into the direction of battery core.The first surface 111 of metal foil 11 includes one on its width X
First area 121 and two second areas 122, and in the direction of the width, first area 121 is located at the center of first surface 111
Position, two second areas 122 are distributed in the both sides of first area 121, and first area 121 and second area 122 are in bar shaped
And extend along the length direction of metal foil 1, wherein, first area 111 is by the corrosion region of 11 corrosion processing formation of metal foil
Domain, second area 112 are non-corrosive region.
The width W1 of said one first area 121 be the sum of the width of two second areas 122 (V1+V2) 78%~
300%, preferably 100%~150%.The thickness D2 of first area 121 is 3 μm~12 μm, the thickness with second area 122
The ratio of D1 is 25%~80%.Multiple holes are distributed with first area 121, and average pore size is 3 μm~20 μm, hole density 100
A hole/cm2~200 hole/cm2, the surface roughness of first area is 3 μm~10 μm.
It is understood that on width X, metal foil can also be set to include three first areas and two
Second area alternates distribution, and first area is corrosion area, and second area is non-corrosive region.
Priming coat 12 is formed on the first surface 111 of metal foil 11, and covers first area 121 and second area 122.
The thickness of priming coat 12 is 6 μm~9 μm, it can be organic matter coating, can be securely bonded to very much in metal foil 11.Can be with
Understand, being also an option that property of priming coat is formed on the position corresponding with first area or second area of metal foil.
Active material layer 13 is formed on priming coat 12.
In some alternative embodiments, metal foil 11 is aluminium foil.
Lithium ion battery
According to the fourth aspect of the utility model embodiment, there is provided a kind of lithium ion battery, including：Cathode sheet,
Anode pole piece, isolation film and electrolyte.Cathode sheet and/or anode pole piece are the electrode that the above embodiment third aspect provides
Pole piece.
The solvent of electrolyte includes the dilute ester of ethylene, propene carbonate, dimethyl carbonate, diethyl carbonate and methyl ethyl carbonate
Ester is one or more of, and solute includes LiPF6、LiBF4、LiBOB、LiAsF6、Li(CF3SO2)2N、LiCF3SO3、LiClO4Middle one kind
It is or several.
Isolation film is selected from includes polyethylene, polypropylene, non-woven fabrics, poly- fibre with electrochemical stability and chemical stability
Tie up the film of one or more materials in material.
Embodiment
Following embodiments more particularly describe the utility model disclosure, these being only intended to illustrate property of embodiment
Illustrate, because various modifications and variations are carried out in the utility model scope of the disclosure is for a person skilled in the art
Significantly.Unless otherwise stated, all parts, percentage and the ratio reported in following embodiments are by weight meter, and
And all reagents for being used in embodiment are all commercially available and can be used directly without further processing.
Cathode current collector
Cathode sheet is using collector as described in Figure 1.
Cathode sheet
Cathode sheet is using electrode plates as described in Figure 3.
Anode pole piece
By active material of positive electrode, conductive agent, binding agent according to certain mass percent, stirring is equal in deionized water
It is even, dual coating (copper foil uses fixed width 80mm, and thickness is 6 μm) is carried out in copper foil surface, by drying, roll-in, cutting, lug
Anode pole piece is prepared in the processes such as welding.
Electrolyte and isolation film composition
Electrolyte includes organic solvent and lithium salts, and organic solvent is diethyl carbonate, methyl ethyl carbonate, ethylene carbonate
Mixture, the volume ratio of three kinds of organic solvents is 1:1:1, lithium salts LiPF6, concentration 1mol/L.
Isolation film is used as using tri- layers of porous polymer films of PE/PP/PE.
The preparation of lithium ion battery
By cathode sheet, anode pole piece, isolation film is wound into battery core, packaged with aluminum plastic film.By vacuum bakeout, note
The lithium ion batteries made of process such as liquid, chemical conversion aging.
Embodiment 1
Cathode sheet uses the collector shown in Fig. 1, wherein：Metal foil is aluminium foil, and aluminium foil fixed width 80mm, thickness is 12 μ
The width W1 of m, first area namely corrosion area is 35mm, and thickness D2 is 6 μm, and the average pore size of first area is 6 μm, Kong Mi
Spend for 100 hole/cm2, surface roughness be 4 μm；The thickness of priming coat is 6 μm.
Embodiment 2
Change the width of first area namely corrosion area in aluminium foil first surface on the basis of embodiment 1, will corrode
The width in region is adjusted to 45mm from 35mm, and the width of two second areas is then corresponding respectively to reduce 5mm, other manufacturing specifications with
Embodiment 1 is consistent.
Embodiment 3
Increase the extent of corrosion of first area namely corrosion area in aluminium foil first surface on the basis of embodiment 1, will
The hole density of corrosion area is from 100 hole/cm2Increase to 200 hole/cm2, other manufacturing specifications are consistent with embodiment 1.
Comparative example 1
Aluminium foil surface directly forms priming coat, then formed and lived on priming coat without corrosion treatment on aluminium foil surface
Property material layer, other manufacturing specifications are consistent with embodiment 1.
Part of detecting
Cathode sheet, isolation film, anode pole piece are placed in order, isolation film is among anode and cathode and plays isolation
Effect, and wind and obtain naked battery core.Qualified naked battery core is completed into shell, baking by tab welding on head cover.Again by note
Lithium ion battery is obtained after the processes such as liquid, encapsulation.
The drift bolt test of lithium ion battery：
By lithium ion battery, fully charged and upper two panels steel clamp tool is with fixation at 25 DEG C, with the sharp steel nail of a diameter of 3mm
Lithium ion battery is penetrated with the thickness direction of the speed of 80mm/s along lithium ion battery, stops 60min, sees whether to smolder or rises
Fire, and detect the temperature on battery core surface.It the results are shown in Table 1.
The loop test of lithium ion battery：
The battery made in embodiment and comparative example is subjected to loop test, is carried out at 25 DEG C with the electric current of 1C (150A)
Charge and discharge cycles are tested, and test capacity decays to 80% cycle-index.It the results are shown in Table 1.
1 battery performance test result of table
In comparative example 1, the cohesive force between priming coat and aluminium foil is 100N/m.In embodiment 1, between priming coat and aluminium foil
Cohesive force be 150N/m., it is apparent that the technical solution of the utility model causes the bonding between priming coat and aluminium foil
Power significantly increases, and priming coat can play the role of aluminium foil more preferable safeguard protection.Aluminium foil surface is not carried out in comparative example 1 rotten
The battery core that the cathode sheet that erosion processing makes is made, has occurred burning of fighting in the test of battery drift bolt, can not have been tested by drift bolt；
Its battery core internal resistance is 0.90m Ω, and circulating battery number is 1000 times.And in embodiment 1, carry out local corrosion shape in aluminium foil surface
The battery core made into loose structure, the cathode sheet made by the aluminium foil, is effectively and stably tested by drift bolt, drift bolt process
The burr of middle formation substantially reduces, and battery core surface temperature is 50 DEG C~60 DEG C after drift bolt, is significantly reduced, and illustrates battery core short circuit production
Heat substantially reduces, and battery safety improves.In embodiment 1, battery core internal resistance is 1.05m Ω, is increased relative to comparative example 1
16.7%；Circulating battery number is 1200 times, and cycle performance improves 20% relative to comparative example 1.In addition, in embodiment 1 simply
Carry out corrosion treatment to the regional area of aluminium foil before basecoat material is coated, process and easy to operate, subsequent production is easily real
Apply.
In embodiment 2, the cohesive force between priming coat and aluminium foil is 180N/m., it is apparent that the face of corrosion area
Product increase so that the cohesive force increase between priming coat and aluminium foil, priming coat can play aluminium foil more preferable safeguard protection and make
With.The battery core obtained in example 2 is effectively and stably tested by drift bolt, and compared with Example 1, increases corrosion area
Width, when battery drift bolt is through the probability bigger of corrosion area, and the burr formed during drift bolt is less, battery core table after drift bolt
Face temperature is lower, is 40 DEG C~50 DEG C.In embodiment 2, battery core internal resistance is 1.15m Ω, increases by 27.8% relative to comparative example 1；
Circulating battery number is 1100 times, and 10% is improved relative to comparative example 1.But compared with Example 1, embodiment 2 is produced
Battery core internal resistance is larger, and electrical property is accordingly poor, and corrosion area is widened and makes aluminium foil elongation relatively low, is easy to cause aluminium foil broken belt,
The excellent rate of processing and fabricating is relatively low.
In embodiment 3, the cohesive force between priming coat and aluminium foil is 200N/m., it is apparent that the hole of corrosion area
Density increase so that the cohesive force increase between priming coat and aluminium foil, priming coat can play aluminium foil more preferable safeguard protection
Effect.The battery core obtained in embodiment 3 is effectively and stably tested by drift bolt, and compared with Example 1, increases corrosion region
The hole density in domain, the burr formed during battery drift bolt is less, and battery core surface temperature is lower after drift bolt, is 40 DEG C~50 DEG C.
In embodiment 3, battery core internal resistance is 1.20m Ω, increases by 33.3% relative to comparative example 1；Circulating battery number is 1000 times, and right
Ratio 1 is suitable.But the battery core internal resistance that compared with Example 1, embodiment 2 is produced is larger, and electrical property is accordingly poor, and corrosion region
Domain hole density increase makes the elongation of aluminium foil relatively low, is easy to cause aluminium foil broken belt, and the excellent rate of processing and fabricating is relatively low.
The above, is only specific embodiment of the present utility model, but the scope of protection of the utility model is not limited to
In this, any one skilled in the art can readily occur in various in the technical scope that the utility model discloses
Equivalent modifications or substitutions, these modifications or substitutions should be covered within the scope of the utility model.Therefore, this practicality
New protection domain should be subject to scope of the claims.
Claims (10)
1. a kind of collector, it is characterised in that the collector includes：
Metal foil, including opposite first surface and second surface, the first surface and second surface at least one include hand over
First area and second area for distribution, the first area are by the corrosion region of the metal foil corrosionization processing formation
Domain, the area of the first area account for the 33%~75% of the sum of the first area and second area area, firstth area
Multiple holes are distributed with domain, and the average pore size in the multiple hole is 3 μm~20 μm；
Priming coat, is formed at the first surface and second surface at least one.
2. collector according to claim 1, it is characterised in that the first area and second area are in the metal foil
Width on be alternately distributed.
3. collector according to claim 2, it is characterised in that the first area and the second area are in bar shaped
And extend along the length direction of the metal foil；
The centre position of the first surface and/or the second surface in the width direction is the first area, this
The both sides in one region are distributed with the second area；Alternatively,
The first surface and/or the second surface include three first areas and two second areas in the width direction
Alternate distribution.
4. collector according to claim 3, it is characterised in that the sum of width of the first area is secondth area
The 78%~300% of the sum of the width in domain.
5. collector according to claim 1, it is characterised in that the surface roughness of the first area is 3 μm~10 μ
m。
6. collector according to claim 1, it is characterised in that the hole density of the first area is 100 hole/cm2~
200 hole/cm2。
7. collector according to claim 1, it is characterised in that the thickness of the first area and the thickness of second area
Ratio be 25%~80%, the thickness of the first area is 3 μm~12 μm.
8. collector according to claim 1, it is characterised in that the priming coat be formed at the first area and/or
On second area, the thickness of the priming coat is 6 μm~9 μm.
9. a kind of electrode plates, it is characterised in that the electrode plates include collector and the active matter material being cascading
The bed of material, wherein, the collector is the collector as described in claim 1 to 8 any one.
A kind of 10. lithium ion battery, it is characterised in that including：Cathode sheet, anode pole piece, isolation film and electrolyte, described the moon
Pole pole piece and/or anode pole piece are electrode plates as claimed in claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721501127.7U CN207353383U (en) | 2017-11-10 | 2017-11-10 | Collector, electrode plates and lithium ion battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721501127.7U CN207353383U (en) | 2017-11-10 | 2017-11-10 | Collector, electrode plates and lithium ion battery |
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| CN207353383U true CN207353383U (en) | 2018-05-11 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109119681A (en) * | 2018-09-14 | 2019-01-01 | 中航锂电技术研究院有限公司 | A kind of highly secure lithium ion battery |
| WO2020008285A1 (en) * | 2018-07-03 | 2020-01-09 | International Business Machines Corporation | Rechargeable lithium-ion battery with an anode structure containing a porous region |
| CN112789752A (en) * | 2020-09-23 | 2021-05-11 | 宁德新能源科技有限公司 | Composite current collector, electrode plate and electrochemical device |
| CN113036086A (en) * | 2019-12-24 | 2021-06-25 | 广州方邦电子股份有限公司 | Preparation method of battery pole piece, battery pole piece and lithium battery |
| CN113330601A (en) * | 2020-08-31 | 2021-08-31 | 宁德新能源科技有限公司 | Pole piece, electrochemical device and electronic device |
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| CN113036086A (en) * | 2019-12-24 | 2021-06-25 | 广州方邦电子股份有限公司 | Preparation method of battery pole piece, battery pole piece and lithium battery |
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