CN205752377U - Lithium rechargeable battery - Google Patents
Lithium rechargeable battery Download PDFInfo
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- CN205752377U CN205752377U CN201620601046.3U CN201620601046U CN205752377U CN 205752377 U CN205752377 U CN 205752377U CN 201620601046 U CN201620601046 U CN 201620601046U CN 205752377 U CN205752377 U CN 205752377U
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
This utility model relates to technical field of lithium batteries, particularly relate to lithium rechargeable battery, including anode pole piece, cathode pole piece and the isolating membrane being located between anode pole piece and cathode pole piece, anode pole piece includes plus plate current-collecting body, the positive electrode active material layer being coated on relative two surfaces of plus plate current-collecting body and is located at the positive pole ear of plus plate current-collecting body end, and cathode pole piece includes negative current collector, the negative electrode active material layer being coated on relative two surfaces of negative current collector and is located at the negative lug of negative current collector end；The width of plus plate current-collecting body is identical with the width of negative current collector, and the width of positive electrode active material layer is less than the width of negative electrode active material layer.Owing to all there is space between the both sides of the edge of anode pole piece and cathode pole piece and isolating membrane in this utility model, thus reduce and occur that metallic bur power pierces through the risk of isolating membrane, reduce the phenomenon that short circuit occurs between pole piece, and then the problem that the self discharge that is prevented effectively from lithium rechargeable battery is excessive.
Description
Technical field
This utility model relates to technical field of lithium batteries, particularly relates to lithium rechargeable battery.
Background technology
Lithium rechargeable battery is owing to it is safe and environment-friendly, energy density is high, do not have the excellent performances such as memory effect, quilt
It is widely used in the products such as mobile phone, number, electric automobile, benefits our life.Rapid along with these electricity consumption products
Development, also requires that lithium rechargeable battery must possess and has higher energy density, longer cycle period, safer electricity
The characteristics such as pond performance, lower energy loss, the battery product more particularly re-used after long-time storage, more it is intended to
Asking it to possess low-down self-discharge performance, the self-discharge phenomenon how reducing battery has become the heat of lithium power technology personnel research
Topic.
In the manufacture process of lithium rechargeable battery, the both positive and negative polarity pole piece of battery needs the mode cut through cutter to cut out
Be cut into the size of process requirements, and use pole piece that mechanical force the cuts out end face at metal foil edge to occur or
How or the longest or short metallic bur power, the direction of extension of these metallic bur powers presents erratic behavior, non-parallel to metal foil
The metallic bur power of in-plane the most likely pierces through the isolating membrane in the middle of both positive and negative polarity pole piece, causes both positive and negative polarity pole piece to occur that physics is micro-
Short circuit, this is the major reason causing self-discharge of battery excessive.The inside of this kind of current lithium rechargeable battery is positive and negative
The structure of pole pole piece superposition is substantially the structure of anode pole piece/isolating membrane/cathode pole piece, from the angle of electrochemical reaction, for
Avoiding negative pole edge analysis lithium occur and occur that Li dendrite pierces through the risk of barrier film short circuit further, the width of anode pole piece is general
Can be than the narrow width of cathode pole piece.Under the overlaying structure of existing this kind of anode pole piece/isolating membrane/cathode pole piece, the most just
There is metallic bur power in cathode pole piece both sides end face, and metallic bur power will be easy to pierce through the isolating membrane of centre and cause positive/negative plate thing
, there is self discharge problem, thus also brings energy loss and potential safety hazard in reason micro-short circuit.
In order to reduce the metallic bur power harmful effect to self-discharge of battery problem, settling mode currently mainly still passes through
Improvement pole piece cutting tool intensity and degree of accuracy are to reduce the fraction defective of metallic bur power, and thicken the isolation between both positive and negative polarity pole piece
Film, improves the puncture strength of isolating membrane.Even if being that the cutting tool of high intensity the most also can be inevitable
There is abrasion in ground, and pole piece still can be made to there is metallic bur power more or less.Same, it is constantly needed at lithium rechargeable battery
Improving today of energy density, the isolating membrane in the middle of both positive and negative polarity needs the most thinning, thicken isolating membrane in the middle of both positive and negative polarity without
Doubtful meeting greatly affects the energy density of battery.
Utility model content
The purpose of this utility model is to provide a kind of lithium rechargeable battery, it is intended to solve the lithium ion two of prior art
Primary cell exist cause because positive/negative plate short circuit easily occurs self discharge excessive technical problem.
For achieving the above object, the technical solution of the utility model is: lithium rechargeable battery, including anode pole piece, bears
Pole pole piece and be located at the isolating membrane between described anode pole piece and described cathode pole piece, described anode pole piece includes anode collection
Body, the positive electrode active material layer being coated on relative two surfaces of described plus plate current-collecting body and be located at described plus plate current-collecting body end
The positive pole ear in portion, described cathode pole piece includes negative current collector, is coated on relative two surfaces of described negative current collector
Negative electrode active material layer and be located at the negative lug of described negative current collector end；The width of described plus plate current-collecting body is with described
The width of negative current collector is identical, and the width of described positive electrode active material layer is less than the width of described negative electrode active material layer.
Preferably, described positive electrode active material layer centrage in the width direction and described negative electrode active material layer are along width
The centrage in direction overlaps.
Preferably, the width of described positive electrode active material layer is less than the width of described plus plate current-collecting body, and described positive pole is lived
Property material layer width two edges and the two edges of described plus plate current-collecting body width between form positive pole edge sky paper tinsel；
The width of described negative electrode active material layer is less than the width of described negative current collector, and described negative electrode active material layer width
Two edges and the two edges of described negative current collector width between form negative pole edge sky paper tinsel.
Preferably, the width of the described negative pole edge sky paper tinsel that the width ratio of described positive pole edge sky paper tinsel is corresponding with its position
Greatly.
Preferably, the width of described positive pole edge sky paper tinsel is 0.1～5mm.
Preferably, the surface of described positive pole edge sky paper tinsel and the surface of described negative pole edge sky paper tinsel are coated with ceramic layer.
Preferably, the thickness of described ceramic layer is 1～20 μm.
Preferably, described ceramic layer is alumina ceramic layer or zirconia ceramic layer.
Preferably, described plus plate current-collecting body is aluminium foil, and described negative current collector is copper foil.
Preferably, the outside of described positive pole ear and the outside of described negative lug are all coated with insulation gummed paper.
The beneficial effects of the utility model: lithium rechargeable battery of the present utility model, plus plate current-collecting body and negative pole currect collecting
Relative two surfaces of body are respectively coated with certain thickness and the positive electrode active material layer of width and negative electrode active material layer, then just
The position of the both sides of the edge of pole pole piece width is thin relative to the centre position of anode pole piece width, in like manner, and negative pole pole
The position of the both sides of the edge of sheet width is thin relative to the centre position of cathode pole piece width, and positive/negative plate is through pulleying
Around or after being stacked into battery core, the direction that anode pole piece and cathode pole piece are perpendicular to plus plate current-collecting body and negative current collector has
Certain thickness positive electrode active material layer and negative electrode active material layer, positive electrode active material layer and negative electrode active material layer can be just
The centre position of pole pole piece and cathode pole piece produces support force, supports plus plate current-collecting body and the negative pole of cathode pole piece of anode pole piece
Collector is in parallel position so that all have one between position, both sides of the edge and the isolating membrane of anode pole piece and cathode pole piece
Fixed space, in the case, isolating membrane is difficult to be applied to anode pole piece and negative pole at the constraint active force of winding or heap poststack
On the both sides of the edge of pole piece, make the metallic bur power of anode pole piece both sides of the edge due to by the extraneous active force applied not very
Difficulty pierces through isolating membrane；Meanwhile, even if metallic bur power has pierced through isolating membrane under the effect of other irresistible power, also because of gold
Belong to the space distance existed between direction and the position, two edges of anode pole piece and cathode pole piece of burr and be just not readily accessible to
Pole pole piece or cathode pole piece, thus reduce and occur that metallic bur power pierces through the risk of isolating membrane, reduce metallic bur power and just bring
There is the phenomenon of physics micro-short circuit in pole pole piece and cathode pole piece, and then the self discharge being prevented effectively from lithium rechargeable battery is excessive
Problem.
Accompanying drawing explanation
Fig. 1 is not coated with structural representation during ceramic layer for the lithium rechargeable battery that this utility model embodiment provides
Figure.
Fig. 2 is coated with structural representation during ceramic layer for the lithium rechargeable battery that this utility model embodiment provides.
Another structure when Fig. 3 is not coated with ceramic layer for the lithium rechargeable battery that this utility model embodiment provides is shown
It is intended to.
Fig. 4 is coated with another structural representation during ceramic layer for the lithium rechargeable battery that this utility model embodiment provides
Figure.
The positive pole limit of the two edges of the width that the lithium rechargeable battery that Fig. 5 provides for this utility model embodiment is coated with
The structural representation of the anode pole piece that edge sky paper tinsel width is identical.
The negative pole limit of the two edges of the width that the lithium rechargeable battery that Fig. 6 provides for this utility model embodiment is coated with
The structural representation of the cathode pole piece that edge sky paper tinsel width is identical.
The positive pole limit of the two edges of the width that the lithium rechargeable battery that Fig. 7 provides for this utility model embodiment is coated with
The structural representation of the anode pole piece that edge sky paper tinsel width differs.
The negative pole limit of the two edges of the width that the lithium rechargeable battery that Fig. 8 provides for this utility model embodiment is coated with
The structural representation of the cathode pole piece that edge sky paper tinsel width differs.
The positive pole limit of the two edges of the width that the lithium rechargeable battery that Fig. 9 provides for this utility model embodiment is coated with
Edge sky paper tinsel is coated with the structural representation of the anode pole piece of ceramic layer.
The negative pole of the two edges of the width that the lithium rechargeable battery that Figure 10 provides for this utility model embodiment is coated with
Edge sky paper tinsel is coated with the structural representation of the cathode pole piece of ceramic layer.
Reference includes:
10 anode pole piece 11 plus plate current-collecting body 12 positive electrode active material layers
13 positive pole ear 20 cathode pole piece 21 negative current collectors
22 negative electrode active material layer 23 negative lug 30 isolating membrane
40 ceramic layers 50 insulate gummed paper 111 positive pole edge sky paper tinsel
211 negative pole edge sky paper tinsels.
Detailed description of the invention
Of the present utility model embodiment is described below in detail, and the example of described embodiment is shown in the drawings, the most ad initio
Represent same or similar element to same or similar label eventually or there is the element of same or like function.Below by ginseng
It is exemplary for examining the embodiment that accompanying drawing 1～10 describes, it is intended to be used for explaining this utility model, and it is not intended that to this practicality
Novel restriction.
In description of the present utility model, it is to be understood that term " length ", " width ", " on ", D score, " front ",
Orientation or the position relationship of the instruction such as " afterwards ", "left", "right", " vertically ", " level ", " top ", " end " " interior ", " outward " are based on attached
Orientation shown in figure or position relationship, be for only for ease of description this utility model and simplify description rather than instruction or hint
The device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to this
The restriction of utility model.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance
Or the implicit quantity indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or
Implicitly include one or more this feature.In description of the present utility model, " multiple " are meant that two or two
Above, unless otherwise expressly limited specifically.
In this utility model, unless otherwise clearly defined and limited, term " install ", " being connected ", " connection ", " Gu
Fixed " etc. term should be interpreted broadly, connect for example, it may be fixing, it is also possible to be to removably connect, or integral；Can be
It is mechanically connected, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, can be two
The connection of element internal or the interaction relationship of two elements.For the ordinary skill in the art, can basis
Concrete condition understands above-mentioned term concrete meaning in this utility model.
As shown in Figures 1 to 10, this utility model embodiment provide lithium rechargeable battery, including anode pole piece 10,
Cathode pole piece 20 and be located at the isolating membrane 30 between described anode pole piece 10 and described cathode pole piece 20, described anode pole piece 10
The positive electrode active material layer 12 that including plus plate current-collecting body 11, is coated on relative two surfaces of described plus plate current-collecting body 11 and setting
In the positive pole ear 13 of described plus plate current-collecting body 11 end, described cathode pole piece 20 include negative current collector 21, be coated on described
Negative electrode active material layer 22 on relative two surfaces of negative current collector 21 and be located at the negative of described negative current collector 21 end
Pole lug 23；The width H1 of described plus plate current-collecting body 11 is identical with the width H2 of described negative current collector 21, described positive-active
The width h1 of material layer 12 is less than the width h2 of described negative electrode active material layer 22.
Concrete, the lithium rechargeable battery of this utility model embodiment, plus plate current-collecting body 11 and negative current collector 21
Relative two surfaces are respectively coated with positive electrode active material layer 12 and the negative electrode active material layer 22 of certain thickness and width, then just
The position of the both sides of the edge of pole pole piece 10 width is thin relative to the centre position of anode pole piece 10 width, in like manner, negative
The position of the both sides of the edge of pole pole piece 20 width is thin relative to the centre position of cathode pole piece 20 width, positive/negative plate
After winding or being stacked into battery core, it is perpendicular to plus plate current-collecting body 11 and negative pole currect collecting at anode pole piece 10 and cathode pole piece 20
There is on the direction of body 21 certain thickness positive electrode active material layer 12 and negative electrode active material layer 22, positive electrode active material layer 12
Support force can be produced in the centre position of anode pole piece 10 and cathode pole piece 20 with negative electrode active material layer 22, support anode pole piece
The plus plate current-collecting body 11 of 10 is in parallel position with the negative current collector 21 of cathode pole piece 20 so that anode pole piece 10 and negative pole
All there is certain space between position, both sides of the edge and the isolating membrane 30 of pole piece 20, in the case, isolating membrane 30 is at winding
Or the constraint active force of heap poststack is difficult to be applied on the both sides of the edge of anode pole piece 10 and cathode pole piece 20, make anode pole piece 10
The metallic bur power of both sides of the edge is not owing to being difficult to pierce through isolating membrane 30 by the extraneous active force applied；Meanwhile, though golden
Belong to burr and under the effect of other irresistible power, pierce through isolating membrane 30, also because of direction and the anode pole piece of metallic bur power
Between 10 and the position, two edges of cathode pole piece 20 exist space distance and be not readily accessible to anode pole piece 10 or negative pole pole
Sheet 20, thus reduce and occur that metallic bur power pierces through the risk of isolating membrane 30, the anode pole piece 10 that minimizing metallic bur power brings is with negative
There is the phenomenon of physics micro-short circuit in pole pole piece 20, and then the problem that the self discharge that is prevented effectively from lithium rechargeable battery is excessive, fall
Low-yield loss ratio.
Shown in Fig. 1, in the present embodiment, described positive electrode active material layer 12 centrage in the width direction is negative with described
Pole active material layer 22 centrage in the width direction overlaps.Concrete, by positive electrode active material layer 12 and negative electrode active
Material layer 22 alignment is arranged, and is so able to ensure that the lithium ion that anode pole piece 10 produces transfers to, on cathode pole piece 20, have completely
The lithium ion that effect avoids anode pole piece 10 to produce precipitate into negative current collector 21 and is not coated with the position of negative electrode active material layer 22
On, such that it is able to be prevented effectively from generation Li dendrite and pierce through isolating membrane 30, prevent physics micro-short circuit and cause lithium ion two
The self discharge of primary cell is excessive.
Shown in Fig. 1,3 and Fig. 5～8, in the present embodiment, the width h1 of described positive electrode active material layer 12 is less than described
The width H1 of plus plate current-collecting body 11, and the two edges of described positive electrode active material layer 12 width and described plus plate current-collecting body 11
Positive pole edge sky paper tinsel 111 is formed between the two edges of width；The width h2 of described negative electrode active material layer 22 is less than described
The width H2 of negative current collector 21, and the two edges of described negative electrode active material layer 22 width and described negative current collector 21
Negative pole edge sky paper tinsel 211 is formed between the two edges of width.Concrete, positive pole edge sky paper tinsel 111 and negative pole edge sky paper tinsel
211 positions are corresponding, so, are not coated with active matter owing to having on positive pole edge sky paper tinsel 111 and negative pole edge sky paper tinsel 211
Matter layer, then certain space can be formed between positive pole edge sky paper tinsel 111 and negative pole edge sky paper tinsel 211, the existence in this space
Isolating membrane 30 is made to be difficult to be applied to anode pole piece 10 and the two of cathode pole piece 20 under the constraint active force of winding or heap poststack
On lateral edges, make the metallic bur power of anode pole piece 10 both sides of the edge owing to not being difficult to pierce through by the extraneous active force applied
Isolating membrane 30, goes out such that it is able to reduce anode pole piece 10 and the cathode pole piece 20 brought because metallic bur power pierces through isolating membrane 30
The phenomenon of existing physics micro-short circuit, and then the problem that the self discharge that is prevented effectively from lithium rechargeable battery is excessive.
May insure that align it addition, form positive pole edge sky paper tinsel 111 on the two edges of the width of anode pole piece 10
When pole pole piece 10 carries out cutting (cutting of width), it is the positive pole edge of anode pole piece 10 both sides in the position that cutting die cuts
Empty paper tinsel 111, fails to switch to the positive electrode active material layer 12 of anode pole piece 10, can avoid anode pole piece 10 anode pole piece after cutting
There is dusting problems in the edge of 10, thus reduces the dust granules on the surface of anode pole piece 10, reduces dust granules at lithium ion
The inside of secondary cell is pierced through the short circuit phenomenon after isolating membrane 30 and is occurred；In like manner, on the both sides of width of cathode pole piece 20
Form negative pole edge sky paper tinsel 211 on edge and may insure that when anticathode pole piece 20 carries out cutting (cutting of width), at cutting die
The position cut is the negative pole edge sky paper tinsel 211 of cathode pole piece 20 both sides, fails to switch to the negative electrode active material of cathode pole piece 20
Layer 22, can avoid cathode pole piece 20 edge of cathode pole piece 20 after cutting dusting problems occur, thus reduce cathode pole piece 20
The dust granules on surface, reduce dust granules short circuit phenomenon after isolating membrane 30 is pierced through in the inside of lithium rechargeable battery and go out
Existing.
In the present embodiment, need it is further noted that the two edges of positive electrode active material layer 12 width and positive pole
The width h3 of the positive pole edge sky paper tinsel 111 on the both sides formed between the two edges of collector 11 width can be identical width
Degree (refering to Fig. 5), it is also possible to be different width (refering to Fig. 7)；In like manner, the two edges of negative electrode active material layer 22 width
And the width h4 of the negative pole edge sky paper tinsel 211 on the both sides formed between the two edges of negative current collector 21 width can be phase
Same width (refering to Fig. 6), it is also possible to be different width (refering to Fig. 8)；But the width h4 of negative pole edge sky paper tinsel 211 and position
The width h3 of corresponding positive pole edge sky paper tinsel 111 is narrow (refering to Fig. 1) all the time.
Shown in Fig. 1, in the present embodiment, the width h3 of described positive pole edge sky paper tinsel 111 is than the institute corresponding with its position
The width h4 stating negative pole edge sky paper tinsel 211 is big.Concrete, the width h3 of positive pole edge sky paper tinsel 111 is than negative pole edge sky paper tinsel 211
Width h4 may insure that greatly the width H1 of the positive electrode active material layer 12 on plus plate current-collecting body 11 is than bearing on negative current collector 21
The width H2 of pole active material layer 22 is little, this ensure that the lithium ion energy of positive electrode active material layer 12 output of anode pole piece 10
It is enough by the timely and effective reception of negative electrode active material layer 22 of cathode pole piece 20, it is to avoid because cathode pole piece 20 receives anode pole piece 10
Output lithium ion not in time cause analysis lithium and produce Li dendrite, such that it is able to avoid because have Li dendrite generation and to every
Cause from film 30 and puncture.
In the present embodiment, the width h3 of described positive pole edge sky paper tinsel 111 is 0.1～5mm.Concrete, positive pole edge is empty
Paper tinsel 111 is limited in the width range of 0.1～5mm, both can effectively guarantee can to coat on plus plate current-collecting body 11 sufficiently wide
Positive electrode active material layer 12, it is also possible to avoid positive pole pole because of the existence of the positive pole edge sky paper tinsel 111 in having this width range
The metallic bur power that the two edges of sheet 10 produce pierces through isolating membrane 30 and causes the phenomenon of physics micro-short circuit to occur, such that it is able to effectively
The self discharge of reduction lithium rechargeable battery, reasonable in design, practical.Certainly, by the width of positive pole edge sky paper tinsel 111
In the range of h3 is set in 0.1～5mm, then the width h4 of negative pole edge sky paper tinsel 211 is less than the width h3 of positive pole edge sky paper tinsel 111
?.More specifically, the width h3 of positive pole edge sky paper tinsel 111 can be 0.1mm, 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm,
3mm, 3.5mm, 4mm, 4.5mm or 5mm.Preferably, the width h3 of positive pole edge sky paper tinsel 111 be 0.1mm, 0.5mm, 1mm,
1.5mm or 2mm.Wherein, the width h3 of the positive pole edge sky paper tinsel 111 that sky paper tinsel 211 in negative pole edge is corresponding with position wants all the time
Narrow, say, that the width h3 of positive pole edge sky paper tinsel 111 is 0.1mm, 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm,
When 3.5mm, 4mm, 4.5mm or 5mm, the width h3 of the positive pole edge sky paper tinsel 111 that negative pole edge sky paper tinsel 211 is corresponding with position is
Narrow, the most accordingly less than 0.1mm, 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm or 5mm
Value.
Shown in Fig. 2,4 and Fig. 9～10, in the present embodiment, the surface of described positive pole edge sky paper tinsel 111 and described negative pole
The surface of edge sky paper tinsel 211 is coated with ceramic layer 40.Concrete, arranging of ceramic layer 40 can reduce anode pole piece further
10 or cathode pole piece 20 on metallic bur power pierce through the risk of isolating membrane 30, even if anode pole piece 10 or cathode pole piece 20
The metallic bur power of both sides has pierced through isolating membrane 30, and what metallic bur power first touched is the surface being coated on positive pole edge sky paper tinsel 111
Or the ceramic layer 40 on the surface of negative pole edge sky paper tinsel 211, ceramic layer 40 can completely cut off electric connection, it is to avoid is short-circuited,
Such that it is able to be effectively reduced metallic bur power to pierce through isolating membrane 30 and the big phenomenon of the self discharge of lithium rechargeable battery that causes.
In the present embodiment, the thickness of described ceramic layer 40 is 1～20 μm.Concrete, the thickness of ceramic layer 40 is set as 1～20 μm models
In enclosing, can avoid affecting anode pole piece 10 and the lamination of cathode pole piece 20 because the thickness of ceramic layer 40 is excessive, also will not
Metallic bur power contact positive pole edge sky paper tinsel 111 and negative pole edge sky paper tinsel 211 cannot be stoped because the thickness of ceramic layer 40 is too small；
More specifically, 1 μm, 2 μm, 3 μm, 4 μm, 5 μm, 6 μm, 7 μm, 8 μm, 9 μm, 10 μm, 11 μm, 12 μm, 13 μm, 14 μm, 15 μm, 16
μm, 17 μm, 18 μm, 19 μm or 20 μm；Preferably, the thickness of ceramic layer 40 be 2 μm, 3 μm, 4 μm, 5 μm, 6 μm, 7 μm, 8 μm,
9 μm or 10 μm.
In the present embodiment, described ceramic layer 40 is alumina ceramic layer or zirconia ceramic layer.Concrete, use oxidation
Aluminum or zirconium oxide make ceramic layer 40 as the material of ceramic layer 40 and are easily achieved and are coated onto positive pole edge sky paper tinsel 111
On surface and on the surface of negative pole edge sky paper tinsel 211, so can be convenient for producing, promote the life to lithium rechargeable battery
Produce efficiency.Meanwhile, aluminium oxide or zirconia material are produced ceramic layer 40 hardness is high and good insulating, it is possible to prevent metal
Burr pierces through, and then it can be avoided that the physics micro-short circuit phenomenon caused because metallic bur power pierces through isolating membrane 30 occurs.
Wherein, after ceramic layer 40 can be by making coating liquid by aluminium oxide or zirconium oxide, with spraying, brush or soak
The mode of painting etc. is coated in surface and the surface of negative pole edge sky paper tinsel 211 of positive pole edge sky paper tinsel 111, the most not only may insure that
Ceramic layer 40 in the surface-coated of the surface of positive pole edge sky paper tinsel 111 and negative pole edge sky paper tinsel 211, it is also possible to guarantee coating
The stability that ceramic layer 40 is attached to the surface of positive pole edge sky paper tinsel 111 and the surface of negative pole edge sky paper tinsel 211 is the best.This reality
Executing in example, described plus plate current-collecting body 11 is aluminium foil, and described negative current collector 21 is copper foil.Concrete, use aluminium foil to make
For plus plate current-collecting body 11 and use copper foil to be primarily due to the good conductivity of aluminium foil and copper foil as negative current collector 21,
Be conducive to boning, easily at the surface-coated active material layer of aluminium foil and copper foil；Meanwhile, aluminium foil and copper foil
Price is relatively low, and so may insure that and reduces the cost that lithium rechargeable battery makes.
Shown in Fig. 1～2 and Fig. 5～10, in the present embodiment, the outside of described positive pole ear 13 and described negative lug
The outside of 23 is all coated with insulation gummed paper 50.Concrete, insulation gummed paper 50 preferably employs resistant to elevated temperatures insulation gummed paper 50, high temperature resistant
Insulation gummed paper 50 can avoid that positive pole ear 13 and negative lug 23 are current concentrated during discharge and recharge may be brought
High temperature problem；It addition, the gold that insulation gummed paper 50 both can occur in welding process with clad anode lug 13 and negative lug 23
Belong to burr, it is also possible to the metallic bur power that clad anode pole piece 10 and cathode pole piece 20 produce during cutting so that metal kernel
Thorn is among the parcel protection of insulation gummed paper 50, it is to avoid the phenomenon of physics micro-short circuit occur because of the existence of this metallic bur power
Occur.
In the present embodiment, the position of the anode pole piece 10 that afterbody at cathode pole piece 20 is corresponding has been sticked insulation gummed paper, this
Even if sample may insure that in the case of the afterbody of anode pole piece 10 and cathode pole piece 20 occurs that metallic bur power pierces through isolating membrane 30
Also the problem not havinging short circuit.
Understanding this utility model in sum is to have above-described good characteristic, is made it on using, promotes
The usefulness that do not has in conventional art and there is practicality, become the product of a great practical value.
The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, all at this
Any amendment, equivalent or the improvement etc. made within the thought of utility model and principle, should be included in this utility model
Protection domain within.
Claims (10)
1. lithium rechargeable battery, including anode pole piece, cathode pole piece and be located at described anode pole piece and described cathode pole piece
Between isolating membrane, it is characterised in that: described anode pole piece includes plus plate current-collecting body, is coated on the relative of described plus plate current-collecting body
Positive electrode active material layer on two surfaces and be located at the positive pole ear of described plus plate current-collecting body end, described cathode pole piece includes
Negative current collector, the negative electrode active material layer being coated on relative two surfaces of described negative current collector and be located at described negative pole
The negative lug of collector end；The width of described plus plate current-collecting body is identical with the width of described negative current collector, described positive pole
The width of active material layer is less than the width of described negative electrode active material layer.
Lithium rechargeable battery the most according to claim 1, it is characterised in that: described positive electrode active material layer is along width side
To centrage overlap with described negative electrode active material layer centrage in the width direction.
Lithium rechargeable battery the most according to claim 1, it is characterised in that: the width of described positive electrode active material layer is little
In the width of described plus plate current-collecting body, and the two edges of described positive electrode active material layer width and described plus plate current-collecting body width
Positive pole edge sky paper tinsel is formed between the two edges in degree direction；The width of described negative electrode active material layer is less than described negative current collector
Width, and the two edges of the two edges of described negative electrode active material layer width and described negative current collector width it
Between form negative pole edge sky paper tinsel.
Lithium rechargeable battery the most according to claim 3, it is characterised in that: the width ratio of described positive pole edge sky paper tinsel with
The width of the described negative pole edge sky paper tinsel that its position is corresponding is big.
Lithium rechargeable battery the most according to claim 3, it is characterised in that: the width of described positive pole edge sky paper tinsel is
0.1～5mm.
Lithium rechargeable battery the most according to claim 3, it is characterised in that: the surface of described positive pole edge sky paper tinsel and institute
The surface stating negative pole edge sky paper tinsel is coated with ceramic layer.
Lithium rechargeable battery the most according to claim 6, it is characterised in that: the thickness of described ceramic layer is 1～20 μm.
Lithium rechargeable battery the most according to claim 6, it is characterised in that: described ceramic layer be alumina ceramic layer or
Person's zirconia ceramic layer.
9. according to the lithium rechargeable battery described in any one of claim 1～8, it is characterised in that: described plus plate current-collecting body is
Aluminium foil, described negative current collector is copper foil.
10. according to the lithium rechargeable battery described in any one of claim 1～8, it is characterised in that: outside described positive pole ear
The outside of portion and described negative lug is all coated with insulation gummed paper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620601046.3U CN205752377U (en) | 2016-06-20 | 2016-06-20 | Lithium rechargeable battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620601046.3U CN205752377U (en) | 2016-06-20 | 2016-06-20 | Lithium rechargeable battery |
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| CN205752377U true CN205752377U (en) | 2016-11-30 |
Family
ID=57386493
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| CN201620601046.3U Active CN205752377U (en) | 2016-06-20 | 2016-06-20 | Lithium rechargeable battery |
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| Country | Link |
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| CN (1) | CN205752377U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110635106A (en) * | 2019-10-23 | 2019-12-31 | 珠海格力电器股份有限公司 | Pole piece, lithium ion battery and manufacturing method of pole piece |
| CN114361721A (en) * | 2021-12-28 | 2022-04-15 | 江苏海基新能源股份有限公司 | Laminated lithium ion battery core package and preparation method thereof |
| WO2022188400A1 (en) * | 2021-03-12 | 2022-09-15 | 横店集团东磁股份有限公司 | Cylindrical lithium ion battery and manufacturing method therefor |
| CN115606020A (en) * | 2021-02-04 | 2023-01-13 | 宁德时代新能源科技股份有限公司（Cn） | Electrode assembly, manufacturing method and manufacturing system thereof, battery cell and battery |
-
2016
- 2016-06-20 CN CN201620601046.3U patent/CN205752377U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110635106A (en) * | 2019-10-23 | 2019-12-31 | 珠海格力电器股份有限公司 | Pole piece, lithium ion battery and manufacturing method of pole piece |
| CN115606020A (en) * | 2021-02-04 | 2023-01-13 | 宁德时代新能源科技股份有限公司（Cn） | Electrode assembly, manufacturing method and manufacturing system thereof, battery cell and battery |
| CN115606020B (en) * | 2021-02-04 | 2023-12-12 | 宁德时代新能源科技股份有限公司 | Electrode assembly, manufacturing method and manufacturing system thereof, battery cell and battery |
| WO2022188400A1 (en) * | 2021-03-12 | 2022-09-15 | 横店集团东磁股份有限公司 | Cylindrical lithium ion battery and manufacturing method therefor |
| CN114361721A (en) * | 2021-12-28 | 2022-04-15 | 江苏海基新能源股份有限公司 | Laminated lithium ion battery core package and preparation method thereof |
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