CN205944236U - Battery sheet and contain lithium ion battery of this pole piece - Google Patents
Battery sheet and contain lithium ion battery of this pole piece Download PDFInfo
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- CN205944236U CN205944236U CN201620754785.6U CN201620754785U CN205944236U CN 205944236 U CN205944236 U CN 205944236U CN 201620754785 U CN201620754785 U CN 201620754785U CN 205944236 U CN205944236 U CN 205944236U
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- battery
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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
The utility model belongs to the technical field of lithium ion battery, concretely relates to battery sheet, including the mass flow body and coat in the diaphragm layer on collection fluidic surface, be provided with the breach on the diaphragm layer, the breach sets up the department of buckling when battery sheet convolutes. Additionally, the utility model provides a lithium ion battery who contains this battery sheet. Compared with the prior art, the utility model discloses the department of buckling when battery sheet convolutes is provided with the breach, when the length of battery or width direction receive extrusion or striking, most energy when the breach can regard as buffers to absorb or mitigate extrusion or striking, thereby to the destruction of electrode entity part when having reduced extrusion or striking, especially, can reduce the fracture possibility as collection fluidic metal foil, and then the risk of the inside short circuit that the battery caused because of extrusion or striking has been reduced, and the safety of the battery is greatly improved.
Description
Technical field
This utility model belongs to technical field of lithium ion and in particular to a kind of battery pole piece and the lithium comprising this pole piece
Ion battery.
Background technology
Secondary cell with commercial Li-ion battery as main flow has entered the movable living of masses comprehensively, in intelligent handss
On the products such as machine, panel computer, Intelligent worn device, substantially all adopt lithium ion battery as power supply.But with intelligent and portable
Being continuously increased and device miniaturization, lightening development trend of formula mobile device functionality integrated level, its energy to battery
The requirement more and more higher of density.
In order to improve the energy density of battery, membrane thicknesses have reduced to 10～below 12um, as plus plate current-collecting body
Aluminum (Al) paper tinsel and copper (Cu) paper tinsel of negative current collector be also reduced to 10～12um and 6～8um respectively.Although battery
Energy density has obtained certain raising, but in recent years, the consumer electronics with smart mobile phone and panel computer as representative is produced
Product and the light-weight electric instrument being represented with intelligent balance Che Wei, its when whole machine such as is subject to unexpected extruding, clashes at the mechanical damage,
Battery catches fire or the security incident exploded is seen in space in a newspaper frequently, and this threatens to the security of the lives and property of consumer,
Adversely affect also to the reputation of terminal brand business, also result in great economic loss simultaneously.
It is known that isolating membrane is thinner, its tension and anti-thorn intensity are lower, thus are easier by pole piece breakage or fracture
The burr producing punctures and causes internal short-circuit；Collector is thinner simultaneously, and its intensity is lower, when pole piece is squeezed or bends,
It is more easily broken off and produce breakage or fracture burr.Thus the higher battery of energy density, especially Large Copacity high-energy-density
Battery, its security performance, particularly machine security performance relatively can be poorer.
In view of this, it is necessory to provide a kind of battery pole piece and the lithium ion battery comprising this pole piece, to reduce pole piece
There is damaged or fracture probability, thus reducing the probability of internal short-circuit of battery, lifting the machine security of battery further
Performance.
Utility model content
One of the purpose of this utility model is：For the deficiency of present technology, and provide a kind of battery pole piece, in battery
When the mechanical damage such as surprisingly being extruded or clash into, this pole piece can keep its original integrity, thus reducing or avoiding pole piece
Fracture or damaged and the section producing and burr pierce through isolating membrane and cause the risk of batteries caught fire or blast.
To achieve these goals, this utility model adopts the following technical scheme that：
A kind of battery pole piece, including the membrane layer of collector and the surface being coated on described collector, described membrane layer
Upper setting is jagged, and described breach is arranged at bending place during battery pole piece winding.
As one kind improvement of battery pole piece described in the utility model, the area of described breach is successively passed from inside to outside
Increase.It is known that increasing with battery pole piece Winding Layer, bending place during battery pole piece winding forms the angle of circular arc
Also increasing, therefore, when only the area of breach being also provided with to get over great talent enough to buffer its suffered extruding or collision
Energy, and then play protection battery pole piece effect.In addition, it is necessary to explanation, the area of breach should not be too small, otherwise rises
Less than cushioning effect, and the area of breach is also unsuitable excessive, and breach area is crossed conference and reduced the overall energy density of battery.
As one kind improvement of battery pole piece described in the utility model, described diaphragm and described collector are provided with
Breach.Diaphragm and collector are both provided with its buffering effect of breach more so that battery pole piece is being squeezed or is clashing into simultaneously
Pole piece integrity can preferably be kept during Deng mechanical damage.But arrange on a current collector simultaneously jagged also can produce certain
Negative effect, for example it can increase the resistance of collector, reduces its conductive capability, and processing and making process is complex etc..
As one kind improvement of battery pole piece described in the utility model, the quantity of described breach is than or equal to battery pole
The Winding Layer of piece.Battery pole piece passes through winding and forms battery core, and Winding Layer is decided according to the actual requirements.Usually, every layer extremely
It is provided with a breach less.
As one kind improvement of battery pole piece described in the utility model, the area of described breach is identical.Formed after winding
Cell thickness less, namely Winding Layer is less, and the area of breach may be configured as identical.
As one kind improvement of battery pole piece described in the utility model, the shape of described breach includes triangle, polygon
Shape, circular and oval.Certainly, the shape of breach can change according to actual needs and arbitrarily.
One of the beneficial effects of the utility model are：This utility model provide a kind of battery pole piece, including collector with
And it is coated on the membrane layer on the surface of described collector, described membrane layer is arranged jagged, described breach is arranged at battery pole
Bending place during piece winding.Bending place setting when battery pole piece winds is jagged, when the length of battery or width are subject to
To when extruding or shock, breach can absorb as relief area or relax most of energy when extruding or clashing into, thus decreasing
Destroying it is particularly possible to the fracture reducing the metal foil as collector may to electrode entity part when extruding or shock
Property, and then reduce battery because of the risk of extruding or the internal short-circuit clashing into and causing, substantially increase the safety of battery.
Another object of the present utility model is：For the deficiencies in the prior art, and one kind is provided to comprise above-mentioned battery pole
The lithium ion battery of piece, this lithium ion battery has higher safety when mechanical abuse test or mechanical destruction surprisingly occur
Reliability.
To achieve these goals, this utility model employs the following technical solutions：
A kind of lithium ion battery, including anode pole piece, cathode pole piece, barrier film and electrolyte, described anode pole piece is this reality
With new described battery pole piece.Arrange jagged on anode pole piece, can effectively slow down the machinery such as extruding or the collision in the external world broken
Badly so that lithium ion battery has higher security reliability.It should be noted that why this utility model is not individually negative
On the pole piece of pole, setting breach is because that positive active material in the anode pole piece when arranging jagged on negative pole is discharged
Lithium ion will not have corresponding negative active core-shell material to react on cathode pole piece, then will have the lithium ion partly dissociating
Produce, that is, analysis lithium phenomenon can be produced, the Li dendrite that lithium generation analysed by battery can puncture isolating membrane, inside battery can be led to occur
Short circuit, and then bring battery core tympanites, the problems such as cycle life decay is fast, even there is blast on fire etc. in more serious.
As one kind improvement of lithium ion battery described in the utility model, described anode pole piece and described cathode pole piece are equal
For battery pole piece described in the utility model.That is, being both provided with breach on anode pole piece and cathode pole piece, in this regard, needing
It is noted that the breach on cathode pole piece must be not more than the breach on anode pole piece, otherwise when cathode pole piece does not correspond to
Negative active core-shell material and anode pole piece on negative material when reacting, analysis lithium phenomenon can be produced and produce Li dendrite and puncture isolation
Film, leads to battery short circuit, affects battery safety.
Of the present utility model another advantage is that：This utility model provides a kind of lithium comprising above-mentioned battery pole piece
Ion battery, its battery pole piece is arranged jagged, when battery length or width are squeezed or clash into, pole piece breach
Absorb energy when extruding or shock as relief area and keep the integrity of pole piece, reduce extruding or clash into the broken ring to pole piece
Effect, and then reduce battery because of the risk of interior short and on fire blast, improve the security reliability of battery.
Brief description
Fig. 1 is the structural representation of the battery pole piece in this utility model embodiment 1.
Fig. 2 is the structural representation of the lithium ion battery in this utility model embodiment 1.
Fig. 3 is the structural representation of the battery pole piece in this utility model embodiment 2.
Fig. 4 is the structural representation of the lithium ion battery in this utility model embodiment 2.
Fig. 5 is the structural representation of the battery pole piece in this utility model embodiment 3.
Fig. 6 is the structural representation of the lithium ion battery in this utility model embodiment 3.
Wherein, 1- collector, 2- membrane layer, 3- breach, 4- lug.
Specific embodiment
With reference to specific embodiment and Figure of description, this utility model is described in further detail, but this
The embodiment of utility model is not limited to this.
Embodiment 1
As shown in figure 1, a kind of battery pole piece, including the membrane layer 2 of collector 1 and the surface being coated on collector 1, film
Jagged 3 are arranged, breach 3 is arranged at bending place during battery pole piece winding, Winding Layer is 5 layers, the number of breach 3 on lamella 2
Amount is set to 9, and the shape of breach 3 is disposed as rectangle, and the area of breach 3 is successively incremented by winding outer layer by winding internal layer.
Lug 4 is welded on the collector 1 of battery pole piece.
As shown in Fig. 2 with the battery pole piece in the present embodiment as anode pole piece, by itself and cathode pole piece and membrane winding
Form battery core and inject electrolyte encapsulation formation lithium ion battery.
Embodiment 2
As shown in figure 3, the battery pole piece of the present embodiment is as different from Example 1：All set on membrane layer 2 and collector 1
It is equipped with breach 3, Winding Layer is 8 layers, the quantity of breach 3 is 15, and breach 4 is shaped to triangle, the area of breach 3
Successively it is incremented by from inside to outside.
As shown in figure 4, the lithium ion battery of the present embodiment is as different from Example 1：Anode pole piece and cathode pole piece are equal
For the battery pole piece in the present embodiment.
Other same as Example 1, repeat no more here.
Embodiment 3
As shown in figure 5, the battery pole piece of the present embodiment is as different from Example 1：Winding Layer is 3 layers, breach 3 quantity
For 3, breach 3 is shaped to circle, and the area of breach 3 is identical.
As shown in fig. 6, the lithium ion battery of the present embodiment is as different from Example 1：Anode pole piece and cathode pole piece are equal
For the battery pole piece in the present embodiment.
Other same as Example 1, repeat no more here.
Comparative example 1～3
From unlike embodiment 1～3：Battery pole piece non-notch in comparative example 1～3.
Other identical with embodiment 1～3 respectively, repeat no more here.
Experimental result
Respectively the lithium ion battery in embodiment 1～3 and comparative example 1～3 is carried out with extruding test and weight impact test,
The safety of detection battery.(extruding test：The battery that will be filled with electricity is put in one plane, grants squeezing of 13KN by oil hydraulic cylinder
Pressure, extrudes battery along battery length (direction that lug stretches out), once squeeze pressure reaches maximum or battery deformation is more than
When 50%, stop extruding, battery is not on fire, does not explode and passes through.)
Test experiments result is as shown in table 1.
Table 1 battery security test experiments result
As can be seen from the above table, the lithium ion battery in embodiment 1～3 extruding test in not on fire, do not explode, and
Lithium ion battery in comparative example 1～3 had both occurred on fire in extruding test test and had exploded.As can be seen here, this practicality
It is provided with variously-shaped breach, it can be squeezed in battery or hit on new diaphragm/membrane piece+collector in battery pole piece
Effective cushioning effect is played, it is to avoid the fracture of collector foil, thus avoiding battery because of internal short-circuit when the mechanical damage such as hitting
There is on fire or blast, improve the security performance of battery.
The announcement of book and inspiration according to the above description, this utility model those skilled in the art can also be to above-mentioned reality
The mode of applying is changed and is changed.Therefore, this utility model is not limited to above-mentioned specific embodiment, every this area skill
The done any conspicuously improved, replacement on the basis of this utility model of art personnel or modification belong to this practicality newly
The protection domain of type.Although additionally, employing some specific terms in this specification, these terms are intended merely to conveniently say
Bright.
Claims (8)
1. a kind of battery pole piece, the membrane layer including collector and the surface being coated on described collector it is characterised in that：Institute
State arrange on membrane layer jagged, described breach be arranged at battery pole piece winding when bending place.
2. battery pole piece according to claim 1 it is characterised in that：The area of described breach is outer to winding by winding internal layer
Layer is successively incremented by.
3. battery pole piece according to claim 1 it is characterised in that：It is provided with described membrane layer and described collector
Breach.
4. battery pole piece according to claim 1 it is characterised in that：The quantity of described breach is than or equal to battery pole piece
Winding Layer.
5. battery pole piece according to claim 1 it is characterised in that：The area of described breach is identical.
6. battery pole piece according to claim 1 it is characterised in that：The shape of described breach include triangle, polygon,
Circular and oval.
7. a kind of lithium ion battery, including anode pole piece, cathode pole piece, barrier film and electrolyte it is characterised in that：Described positive pole pole
Piece is the battery pole piece described in any one of claim 1 to 6.
8. lithium ion battery according to claim 7 it is characterised in that：Described anode pole piece and described cathode pole piece are
Battery pole piece described in any one of claim 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620754785.6U CN205944236U (en) | 2016-07-18 | 2016-07-18 | Battery sheet and contain lithium ion battery of this pole piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620754785.6U CN205944236U (en) | 2016-07-18 | 2016-07-18 | Battery sheet and contain lithium ion battery of this pole piece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205944236U true CN205944236U (en) | 2017-02-08 |
Family
ID=57928302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620754785.6U Active CN205944236U (en) | 2016-07-18 | 2016-07-18 | Battery sheet and contain lithium ion battery of this pole piece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205944236U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111261824A (en) * | 2020-01-22 | 2020-06-09 | 深圳吉阳智能科技有限公司 | Lug forming method and lug |
| WO2021027602A1 (en) * | 2019-08-09 | 2021-02-18 | 宁德时代新能源科技股份有限公司 | Electrode assembly, secondary battery, and apparatus using battery |
| CN113644277A (en) * | 2021-08-09 | 2021-11-12 | 宁德新能源科技有限公司 | Electrochemical device and electricity utilization device |
| CN114335425A (en) * | 2022-01-12 | 2022-04-12 | 三一技术装备有限公司 | Pole piece, diaphragm, lamination, battery core manufacturing process and battery |
| CN114641885A (en) * | 2021-06-25 | 2022-06-17 | 宁德新能源科技有限公司 | Winding type lithium ion battery and electronic device |
-
2016
- 2016-07-18 CN CN201620754785.6U patent/CN205944236U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021027602A1 (en) * | 2019-08-09 | 2021-02-18 | 宁德时代新能源科技股份有限公司 | Electrode assembly, secondary battery, and apparatus using battery |
| CN111261824A (en) * | 2020-01-22 | 2020-06-09 | 深圳吉阳智能科技有限公司 | Lug forming method and lug |
| CN114641885A (en) * | 2021-06-25 | 2022-06-17 | 宁德新能源科技有限公司 | Winding type lithium ion battery and electronic device |
| CN113644277A (en) * | 2021-08-09 | 2021-11-12 | 宁德新能源科技有限公司 | Electrochemical device and electricity utilization device |
| CN113644277B (en) * | 2021-08-09 | 2022-10-14 | 宁德新能源科技有限公司 | Electrochemical device and electricity utilization device |
| CN114335425A (en) * | 2022-01-12 | 2022-04-12 | 三一技术装备有限公司 | Pole piece, diaphragm, lamination, battery core manufacturing process and battery |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |