CN207233865U - Electrode plates and lithium ion battery - Google Patents
Electrode plates and lithium ion battery Download PDFInfo
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- CN207233865U CN207233865U CN201721171332.1U CN201721171332U CN207233865U CN 207233865 U CN207233865 U CN 207233865U CN 201721171332 U CN201721171332 U CN 201721171332U CN 207233865 U CN207233865 U CN 207233865U
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- area
- electrode plates
- priming coat
- collector
- pole piece
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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
A kind of electrode plates and lithium ion battery are the utility model is related to, which includes：Collector, the collector include opposite first surface and second surface；Priming coat, is arranged on the first surface of collector, which includes submitting the first area for distribution and second area in a first direction, and basecoat material is coated with first area, and second area exposes the first surface of collector；Active material layer, is arranged on priming coat, and covers first area and second area.Electrode plates and lithium ion battery provided by the utility model reduce the increase of lithium ion battery internal resistance while can improving lithium ion battery security.
Description
Technical field
The utility model relates to battery technology field, more particularly to a kind of electrode plates and lithium ion battery.
Background technology
Lithium ion battery has the advantages that energy density is high as a kind of secondary cell, has extended cycle life.Lithium ion at present
The application of battery extend to electric automobile from consumer electronics products such as mobile phone, laptop, digital products, storage
The power battery fields such as energy power station.
The electrical property of lithium ion battery is one of performance that consumer pays special attention to.The raising lithium ion battery used at present
One important aspect of security is that basecoat material is coated on base material, these basecoat materials have preferable bond effect, can
To be firmly sticked on base material, base material is protected, improves the security performance of lithium ion battery.But these basecoat materials have compared with
Big impedance, the impedance of whole battery can be increased considerably when being coated between base material and active material, deteriorate lithium ion battery
Electrical property.
Utility model content
The utility model embodiment provides a kind of electrode plates and lithium ion battery, can improve lithium ion battery security
While reduce lithium ion battery internal resistance increase.
On the one hand the utility model embodiment provides a kind of electrode plates includes：Collector, the collector include opposite
First surface and second surface；Priming coat, is arranged on the first surface of collector, which is included in a first direction
Alternatively distributed first area and second area, are coated with basecoat material on first area, and the of second area exposure collector
One surface；Active material layer, is arranged on priming coat, and covers first area and second area.
On the electrode plates collector that the utility model embodiment provides primary coat is formed before active material layer is formed
Layer, and the structure of the priming coat is：Alternatively distributed first area and second area in a first direction, apply on first area
Basecoat material is covered with, second area exposes the structure of collector.Collector can be reduced using the priming coat with said structure
The area coverage of upper priming coat, so as to reduce battery core internal resistance, improves gram energy density of battery core, while avoids the positive and negative anodes of battery core
Contacting directly, in large area between collector, improves battery core security performance.In addition, in priming coat exposure collector the
Two regions, therefore the white space of uncoated basecoat material provides swelling stress Free up Memory to active material layer.
According to the one side of the utility model embodiment, electrode plates have predetermined length and width, first party
To the width for electrode plates, first area is in bar shaped, polygon, circle, subcircular.
According to the one side of the utility model embodiment, first area is in bar shaped and along the length direction of electrode plates
Extension, priming coat centre position is second area in a first direction, and the both sides of the second area are distributed with first area.
According to the one side of the utility model embodiment, first area is in bar shaped and along the length direction of electrode plates
Extension, priming coat includes three second areas in a first direction and two first areas alternate distribution.
According to the one side of the utility model embodiment, on first direction, in priming coat the width of second area it
With the 78%~300% of the sum of the width for first area.
According to the one side of the utility model embodiment, on first direction, in priming coat the width of second area it
With the 100%~150% of the sum of the width for first area.
According to the one side of the utility model embodiment, the thickness of second area is 3 μm~12 μm in priming coat.
According to the one side of the utility model embodiment, the surface of the remote priming coat of active material layer is plane.
According to the one side of the utility model embodiment, active material layer part corresponding with first area and afflux
Body contact is set.
On the other hand the utility model embodiment provides a kind of lithium ion battery, including cathode pole piece, cathode pole piece, every
From film and electrolyte.Cathode pole piece and/or anode pole piece include：Collector, including opposite first surface and second surface；Bottom
Coating, is arranged on the first surface of collector, which includes submitting the first area for distribution and the in a first direction
Two regions, basecoat material is coated with first area, and second area exposes the first surface of collector；Active material layer, is set
In on priming coat, and cover first area and second area.
The structure that the utility model embodiment provides lithium ion battery can be widely used in consumer electronics battery
And power battery, play an important roll to the security performance for improving above-mentioned battery, and the internal resistance of battery core will not be increased.
Brief description of the drawings
Imitated below with reference to the accompanying drawings to describe the exemplary feature, advantage and technology for implementing embodiment of the utility model
Fruit.
Fig. 1 is a kind of structure diagram for electrode plates that the utility model embodiment provides.
Fig. 2 is the structure diagram for another electrode plates that the utility model embodiment provides.
Embodiment
In order to become apparent from the purpose of utility model of the utility model, technical solution and advantageous effects, tie below
Embodiment is closed the utility model is further elaborated.It should be appreciated that the embodiment described in this specification is only
Merely to explain the utility model, be not intended to limit the utility model, the formula of embodiment, ratio etc. can adaptation to local conditions do
Go out selection and substantial effect is had no to result.
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, " some " be meant that one or one with
On；" multiple " are meant that two or more；The orientation or position relationship of the instruction such as term " on ", " under ", " interior ", " outer "
Based on orientation shown in the drawings or position relationship, to be for only for ease of description and simplifying description, rather than indicate or imply institute
The device or element of finger must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to herein
Limitation.
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 above-mentioned utility model content of the utility model is not intended to each disclosed implementation in description the utility model
Mode or every kind of implementation.It is described below to more particularly exemplify illustrative embodiments.Many places in entire chapter application,
Guidance is provided by a series of embodiments, these embodiments can use in a variety of combinations.In various embodiments, enumerate
Only as representative group, it should not be construed as exhaustive.
Electrode plates
A kind of first aspect also referring to Fig. 1 and Fig. 2 according to the utility model embodiment, there is provided electrode pole
Piece, including：Collector 11,21, including opposite first surface 111,211 and second surface 112,212；Priming coat 12,22, if
It is placed on the first surface 111,211 of collector 11,21, which is included in a first direction alternatively distributed the on X
One region 122,222 and second area 121,221, are coated with basecoat material on second area 121,221, first area 122,
222 expose the first surface 111,211 of collector 11,21；Active material layer 13,23, is arranged on priming coat 12,22, and
Cover first area 122,222 and second area 121,221.
Specifically, as a kind of example, as shown in Figure 1, electrode plates include collector 11, priming coat 12, active material
Layer 13, priming coat 12 be located on collector 11, and active material layer 13 is located on priming coat 12, and priming coat 12 includes one the
Two regions 121 and two first areas 122, the second area 121 coated with basecoat material are distributed in 11 first direction X of collector
On center, in a first direction on X, two first areas 122 be distributed in 121 both sides of second area.
The width H1 of said one second area 121 be the sum of the width of two first areas 122 (D1+D2) 78%~
300%, preferably 100%~150%.The thickness of second area 121 is 3 μm~12 μm in priming coat 12, first area 122
Thickness be 0 μm, in other words the first area 122 be not coated with basecoat material, afflux is exposed by the first area 122
The first surface 111 of body 11.Basecoat material contains glue and conductive agent, can be securely bonded to very much on collector 11.
It is understood that active material layer 13 is formed at 12 second area of priming coat, 121 surface and by the firstth area
On 11 first surface 111 of collector that domain 122 exposes, therefore active material layer 13 and 122 corresponding part of first area and collection
The contact of 11 first surface 111 of fluid is set, and the surface of the remote priming coat 12 of active material layer 13 is plane.In other words,
Active material layer 13 is the patterned surface with concaveconvex structure towards the surface of priming coat 12, and the surface away from priming coat 12 is
Smooth plane.
It is understood that electrode plates have predetermined length and width, first direction X is the width side of electrode plates
To.The length direction of electrode plates is the direction that electrode plates are curled into battery core.
Collector 11 is aluminium foil.
As another example, as shown in Fig. 2, electrode plates include collector 21, priming coat 22, active material layer 23,
Priming coat 22 is located on collector 21, and active material layer 23 is located on priming coat 22, and priming coat 22 includes three the secondth areas
Domain 221 and two first areas 222, in a first direction on X, three second areas 221 and two first areas 222 alternate
Distribution.It is understood that electrode plates have predetermined length and width, first direction X is the width of electrode plates.
The length direction of electrode plates is the direction that electrode plates are curled into battery core.
The sum of width of above three second area 221 (h1+h2+h3) is the sum of the width of two first areas 222 (d1
+ d2) 78%~300%, preferably 100%~150%.The thickness of second area 221 is 3 μm~12 μ in priming coat 22
M, the thickness of first area 222 is 0 μm, and in other words the first area 222 is not coated with basecoat material, passes through the first area
222 expose the first surface 211 of collector 21.
It is understood that the thickness of priming coat 22 is thinner, the impedance of electrode plates is smaller and in battery core cyclic process
Battery core DC impedance (Direct-Current Resistance, DCR) increase is fewer, so that the cyclical stability of battery core is more preferable,
Simultaneously because priming coat 22 is non-electroactive material, its content is fewer, and the energy density of battery core is higher.But priming coat 22
Thickness cannot be too small, otherwise can not play the protective effect to collector, can not play the role of safeguard protection.
Collector 11 is aluminium foil.
It is understood that active material layer 23 is formed at 22 second area of priming coat, 221 surface and by the firstth area
On 21 first surface 211 of collector that domain 222 exposes, therefore active material layer 23 and 222 corresponding part of first area and collection
The contact of 21 first surface 211 of fluid is set, and the surface of the remote priming coat 22 of active material layer 23 is plane.In other words,
Active material layer 23 is the patterned surface with concaveconvex structure towards the surface of priming coat 22, and the surface away from priming coat 22 is
Smooth plane.
Lithium ion battery
According to the second aspect of the utility model embodiment, there is provided a kind of lithium ion battery, including：Cathode pole piece,
Anode pole piece, isolation film and electrolyte.Anode pole piece and/or cathode pole piece are the electrode that the above embodiment first aspect provides
Pole piece.
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.
Anode pole piece
Anode pole piece is using electrode plates as described in Figure 1.
Cathode pole piece
By negative active core-shell material, conductive agent, binding agent according to certain mass percent, stirring is equal in deionized water
It is even, dual coating (copper thickness is 10 μm) is carried out in copper foil surface, by process systems such as drying, roll-in, cutting, tab weldings
It is standby to obtain cathode pole piece.
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.With PE/PP/PE more than tri- layers
Hole polymer thin film is as isolation film.
The preparation of lithium ion battery
By anode pole piece, cathode pole piece, PP isolation films are 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
Anode pole piece width is 80mm, thickness 60um
Anode pole piece uses the electrode plates shown in Fig. 1, wherein, the thickness of priming coat is 6um, priming coat second area
Width H1 is 40mm.
Embodiment 2
Anode pole piece width is 80mm, thickness 60um
The anode pole piece of the present embodiment and the essentially identical difference of anode pole piece of embodiment 1 are：Priming coat second
The width H1 in region is 60mm.
Embodiment 3
Anode pole piece width is 80mm, thickness 60um
The anode pole piece of the embodiment and the essentially identical difference of anode pole piece of embodiment 1 are：Priming coat second
The width H1 in region is 35mm.
Embodiment 4
Anode pole piece width is 80mm, thickness 60um
The anode pole piece of the present embodiment and the essentially identical difference of anode pole piece of embodiment 1 are：The thickness of priming coat
Spend for 12um.
Embodiment 5
Anode pole piece width is 80mm, thickness 60um
The anode pole piece of the embodiment and the essentially identical difference of anode pole piece of embodiment 1 are：The thickness of priming coat
Spend for 3um.
Comparative example 1
Anode pole piece width is 80mm, thickness 60um
The anode pole piece of the present embodiment and the essentially identical difference of anode pole piece of embodiment 1 are：It is whole in aluminium foil
Priming coat is formed on surface.
Part of detecting
Anode pole piece, isolation film, cathode pole piece are sequentially wound to obtain naked battery core.Qualified naked battery core is led to
Tab welding is crossed on head cover, is completed into shell, baking.158Ah lithium ion batteries are obtained after the processes such as fluid injection, encapsulation again.
The performance test of lithium ion battery：
At 45 DEG C, lithium ion battery is stood 10min by (1)；(2) it is permanent with 75A electric currents constant-current charge to 4.3V, 4.3V again
Pressure charges to 0.05C cut-offs；(3) 10min is stood；(4) ended with 150A electric currents constant-current discharge to 3.0V；(5) 10min is stood.
The testing procedure of repetitive cycling above-mentioned (2) to (5) decays to 80% until discharge capacity.Test result is shown in Table 1.
Table 1, cycle performance of battery data
As shown in table 1, battery core is can be seen that using setting figure on collector from the result of embodiment 1 to 5 and comparative example 1
The scheme of the priming coat of case sets the scheme of priming coat relative to battery core using collector whole surface, and the period of battery core is equal
Be improved, and the initial DC impedance of battery core also have reduction, cyclic discharge capacity decay to 80% after DC impedance increase
It is the phenomenon for having occurred reducing.
Although the present utility model has been described by reference to the preferred embodiments, but the model of the utility model is not being departed from
In the case of enclosing, various improvement can be carried out to it and component therein can be replaced with equivalent.Especially, as long as not depositing
In structural conflict, items technical characteristic mentioned in the various embodiments can be combined in any way.The utility model
It is not limited to specific embodiment disclosed herein, but all technical solutions including falling within the scope of the appended claims.
Claims (10)
1. a kind of electrode plates, it is characterised in that the electrode plates include：
Collector, including opposite first surface and second surface；
Priming coat, is arranged on the first surface of the collector, which includes submitting in a first direction for distribution
First area and second area, basecoat material is coated with the first area, the second area exposes the collector
The first surface；
Active material layer, is arranged on the priming coat, and covers the first area and second area.
2. electrode plates according to claim 1, it is characterised in that the electrode plates have predetermined length and width
Degree, the first direction are the width of the electrode plates, and the first area is in bar shaped, polygon, circle, nearly circle
Shape.
3. electrode plates according to claim 2, it is characterised in that the first area is in bar shaped and along electrode plates
Length direction extends, and the priming coat centre position is the second area in said first direction, and the two of the second area
Side is distributed with the first area.
4. electrode plates according to claim 2, it is characterised in that the first area is in bar shaped and along electrode plates
Length direction extends, and the priming coat includes three second areas in said first direction and two first areas are mutually handed over
For distribution.
5. the electrode plates according to claim 3 or 4, it is characterised in that on the first direction, institute in the priming coat
State the 78%~300% of the sum of the width that the sum of width of second area is the first area.
6. the electrode plates according to claim 3 or 4, it is characterised in that on the first direction, institute in the priming coat
State the 100%~150% of the sum of the width that the sum of width of second area is the first area.
7. the electrode plates according to claim 3 or 4, it is characterised in that the thickness of second area described in the priming coat
Spend for 3 μm~12 μm.
8. electrode plates according to claim 1, it is characterised in that the remote priming coat of the active material layer
Surface is plane.
9. electrode plates according to claim 1, it is characterised in that the active material layer is corresponding with the first area
Part contact setting with the collector.
A kind of 10. lithium ion battery, it is characterised in that including：Anode pole piece, cathode pole piece, isolation film and electrolyte, wherein institute
State anode pole piece and/or cathode pole piece is electrode plates as described in claim 1 to 9 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721171332.1U CN207233865U (en) | 2017-09-13 | 2017-09-13 | Electrode plates and lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721171332.1U CN207233865U (en) | 2017-09-13 | 2017-09-13 | Electrode plates and lithium ion battery |
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| Publication Number | Publication Date |
|---|---|
| CN207233865U true CN207233865U (en) | 2018-04-13 |
Family
ID=61861911
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721171332.1U Active CN207233865U (en) | 2017-09-13 | 2017-09-13 | Electrode plates and lithium ion battery |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110233239A (en) * | 2019-07-15 | 2019-09-13 | 珠海格力电器股份有限公司 | Battery electrode, battery, battery pack, electric vehicle and electric appliance |
| 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 |
| CN113394375A (en) * | 2021-06-15 | 2021-09-14 | 宁德新能源科技有限公司 | Electrochemical device and electronic device |
| CN114122312A (en) * | 2020-08-31 | 2022-03-01 | 宁德新能源科技有限公司 | Pole piece, electrochemical device and electronic device |
| CN114220942A (en) * | 2021-12-10 | 2022-03-22 | Oppo广东移动通信有限公司 | Battery and battery pole piece thereof |
| WO2024051291A1 (en) * | 2022-09-08 | 2024-03-14 | 珠海冠宇电池股份有限公司 | Electrode sheet and battery |
-
2017
- 2017-09-13 CN CN201721171332.1U patent/CN207233865U/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110233239A (en) * | 2019-07-15 | 2019-09-13 | 珠海格力电器股份有限公司 | Battery electrode, battery, battery pack, electric vehicle and electric appliance |
| 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 |
| CN114122312A (en) * | 2020-08-31 | 2022-03-01 | 宁德新能源科技有限公司 | Pole piece, electrochemical device and electronic device |
| WO2022041194A1 (en) * | 2020-08-31 | 2022-03-03 | 宁德新能源科技有限公司 | Electrode plate, electrochemical apparatus, and electronic apparatus |
| CN113394375A (en) * | 2021-06-15 | 2021-09-14 | 宁德新能源科技有限公司 | Electrochemical device and electronic device |
| WO2022262612A1 (en) * | 2021-06-15 | 2022-12-22 | 宁德新能源科技有限公司 | Electrochemical apparatus and electronic apparatus |
| JP2023534339A (en) * | 2021-06-15 | 2023-08-09 | 寧徳新能源科技有限公司 | electrochemical and electronic devices |
| CN114220942A (en) * | 2021-12-10 | 2022-03-22 | Oppo广东移动通信有限公司 | Battery and battery pole piece thereof |
| CN114220942B (en) * | 2021-12-10 | 2024-04-05 | Oppo广东移动通信有限公司 | Battery and battery pole piece thereof |
| WO2024051291A1 (en) * | 2022-09-08 | 2024-03-14 | 珠海冠宇电池股份有限公司 | Electrode sheet and battery |
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