CN205680731U - A kind of high safe lithium ion battery - Google Patents
A kind of high safe lithium ion battery Download PDFInfo
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- CN205680731U CN205680731U CN201521142092.3U CN201521142092U CN205680731U CN 205680731 U CN205680731 U CN 205680731U CN 201521142092 U CN201521142092 U CN 201521142092U CN 205680731 U CN205680731 U CN 205680731U
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Abstract
This utility model discloses a kind of high safe lithium ion battery, including core, core includes the positive plate of coiling and molding, negative plate and the barrier film between positive plate and negative plate, positive plate includes aluminium foil and the first pulp layer being coated on aluminium foil, first pulp layer includes compound LiMn2O4, compound LiMn2O4 is made up of lithium manganate particle and the MA AM oligomerisation nitride layer being coated on lithium manganate particle surface, and compound LiMn2O4 passes through adhesive bond on aluminium foil；Negative plate includes Copper Foil and the second pulp layer being coated on Copper Foil, second pulp layer includes Delanium, Delanium Surface coating has hard carbon layer, and the thickness of hard carbon layer is 10 ~ 20 nanometers, and Delanium Surface coating forms the second pulp layer by adhesive bond after having hard carbon layer on Copper Foil.This utility model can improve the stability of anode and the embedding lithium unit of negative pole on the premise of ensureing battery high-temperature behavior, high-energy-density, thus improves the safety in utilization of battery.
Description
Technical field
This utility model belongs to cell art, is specifically related to a kind of high safe lithium ion battery.
Background technology
Security performance is lithium ion battery, particularly lithium-ion-power cell focal issue of interest.Lithium ion battery
Compared with lithium metal secondary battery, it is greatly improved in terms of security performance, but yet suffers from many in actual applications
Hidden danger.Lithium ion battery with high energy density needs high output voltage and electrode lithium storage content.Current electrolysis liquid is mainly organic molten
Agent, it is difficult to bear the high voltage of more than 4.5 volts, easily decomposes and produces gas, cause battery flatulence, rupture or explode.Meanwhile, fill
Positive and negative pole material under electricity condition itself is the most active, and the positive electrode such as cobalt acid lithium etc holds under overcharge or heating status
Easily recurring structure caves in, and produces significant heat effect, and the lithiated graphite negative pole containing organic solvent also holds when ingress of air
Easy firing.Currently used lithium ion battery is mainly using graphite-based material as negative pole, and its intercalation potential is close to the analysis of lithium metal
Going out current potential, easily cause lithium metal when quick charge and separate out, often exist with Li dendrite or lithium powder state, the former can make battery
Internal short-circuit, the latter can accelerate electrolyte decomposition or burn with air contact.Especially for electric automobile (EV) and mixing
The power lithium-ion battery of power vehicle (HEV), its charging and discharging currents is big, and radiating condition is poor, causes internal temperature of battery to raise.
There are some researches prove: lithium ion battery likely reaches the high temperature (＞ 700 DEG C) making aluminum collector melt under conditions of abuse, from
And cause battery to occur smoldering, the situation such as Fire explosion or even injury to personnel.Therefore, in terms of lithium ion battery safety performance
Research, to the commercialized degree expanding lithium ion battery, it is ensured that during use, the safety of personnel is very important.
Utility model content
The purpose of this utility model is to provide a kind of high safe lithium ion battery, has good safety in utilization.
For reaching this purpose, this utility model by the following technical solutions:
Thering is provided a kind of high safe lithium ion battery, including core, described core includes the positive plate of coiling and molding, negative pole
Sheet and the barrier film between described positive plate and described negative plate, described positive plate includes aluminium foil and is coated on described aluminium foil
On the first pulp layer, described first pulp layer includes compound LiMn2O4, and described compound LiMn2O4 is by lithium manganate particle and cladding
MA-AM oligomerisation nitride layer composition in described lithium manganate particle surface, described compound LiMn2O4 passes through adhesive bond in described aluminum
On paper tinsel；Described negative plate includes Copper Foil and the second pulp layer being coated on described Copper Foil, and described second pulp layer includes artificial
Graphite, described Delanium Surface coating has hard carbon layer, the thickness of described hard carbon layer to be 10 ~ 20 nanometers, described Delanium table
Bread forms described second pulp layer by adhesive bond after being covered with hard carbon layer on described Copper Foil.
The beneficial effects of the utility model: this utility model has the mangaic acid of MA-AM oligomerisation nitride layer by using Surface coating
Lithium granule, as the main material of positive plate, can improve the steady of battery on the premise of ensureing battery high-temperature behavior, high-energy-density
Qualitative, and use the Delanium being coated with by hard carbon layer as the main material of negative plate, the embedding lithium unit of negative pole can be improved, just
The structure of pole piece and negative plate improves the safety in utilization that can improve battery.
Accompanying drawing explanation
Fig. 1 is positive plate and the structural representation of anode ear of this utility model embodiment.
Fig. 2 is negative plate and the structural representation of negative electrode lug of this utility model embodiment.
Fig. 3 is the structural representation of the barrier film of this utility model embodiment.
Fig. 4 is the structural representation of the core of this utility model embodiment.
Fig. 5 is the structural representation after the safe lithium ion battery heat-sealing of this utility model embodiment.
In Fig. 1 ~ 5:
100-core；110-positive plate；111-aluminium foil；112-the first pulp layer；120-negative plate；121-Copper Foil；122-
Second pulp layer；130-barrier film；131-basement membrane；132-copolymer layer；140-anode ear；150-negative electrode lug；160-stop adhesive；
200-housing.
Detailed description of the invention
Below in conjunction with the accompanying drawings 1 ~ 5 and further illustrate the technical solution of the utility model by specific embodiment.
In this utility model, term " first ", " second " are only used for describing purpose, and it is not intended that indicate or hint phase
To importance or the implicit quantity indicating indicated technical characteristic.Thus, define " first ", " second " feature permissible
Express or implicitly include one or more this feature.
In description of the present utility model, unless otherwise clearly defined and limited, term " connects ", " fixing " should do extensively
Reason and good sense solution, connects for example, it may be fixing, it is also possible to be to removably connect, or integral；Can be to be mechanically connected, it is also possible to
It it is electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, can be two components interior connection or
The interaction relationship of two parts.For the ordinary skill in the art, above-mentioned term can be understood with concrete condition
Concrete meaning in this utility model.
As shown in Fig. 1 ~ 5, embodiment of the present utility model provides a kind of high safe lithium ion battery, including core 100,
Core 100 include the positive plate 110 of coiling and molding, negative plate 120 and between positive plate 110 and negative plate 120 every
Film 130, positive plate 110 includes aluminium foil 111 and the first pulp layer 112 being coated on aluminium foil 111, and the first pulp layer 112 includes
Compound LiMn2O4, compound LiMn2O4 is made up of lithium manganate particle and the MA-AM oligomerisation nitride layer being coated on lithium manganate particle surface, multiple
Closing LiMn2O4 by adhesive bond on aluminium foil 111, negative plate 120 includes Copper Foil 121 and be coated on Copper Foil 121 second
Pulp layer 122, the second pulp layer 122 includes that Delanium, Delanium Surface coating have hard carbon layer, and the thickness of hard carbon layer is 10
~ 20 nanometers, Delanium Surface coating forms the second pulp layer 122 by adhesive bond after having hard carbon layer on Copper Foil 121.
The present embodiment, by using Surface coating to have the lithium manganate particle main material as positive plate 110 of MA-AM oligomerisation nitride layer, is being protected
Can improve the stability of battery on the premise of card battery high-temperature behavior, high-energy-density, and use by hard carbon layer be coated with artificial
Graphite, as the main material of negative plate 120, can improve the embedding lithium unit of negative pole, and the structure of positive plate 110 and negative plate 120 changes
Enter the safety in utilization that can improve battery.
In the present embodiment, after the first pulp layer 112 is placed in baking oven baking, MA-AM oligomerisation nitride layer content wherein
Being 3 ~ 8%, the content of lithium manganate particle is 90 ~ 94%.
In the present embodiment, after the second pulp layer 122 is placed in baking oven baking, the surface coated hard carbon layer of Delanium
Content is 10 ~ 20%.
Preferably, as it is shown on figure 3, barrier film 130 includes basement membrane 131 and the copolymer of the side being coated on basement membrane 131
Layer 132.Use this barrier film 130 can increase the bonding stability of positive plate 110 and negative plate 120, can guarantee that again battery simultaneously
Serviceability unaffected.
Specifically, copolymer layer 132 is PVDF-HFP/SiO2Copolymer layer, wherein the content of PVDF be 60.0% ~
The content of 80.0%, HFP is 18.0% ~ 25.0%, SiO2Content be 5.0% ~ 10.0%.PVDF-HFP/SiO2Copolymer layer coats
On basement membrane 131, can guarantee that the liquid electrolyte that inside battery does not dissociate, reduce because of the flammable and easy decomposability of electrolyte
The security risk caused.
In the present embodiment, barrier film 130 is provided with the side of copolymer layer 132 and is connected with negative plate 120, and barrier film 130 is carried on the back
It is connected with positive plate 110 from the side of copolymer layer 132.
Specifically, the thickness of basement membrane 131 is 12 microns.
As shown in Figure 4, core 100 is terminated the edge of winding and is fixed by stop adhesive 160, i.e. positive plate 110, barrier film
130 and negative plate 120 terminate winding edge fixed by the stop adhesive of a strip, to prevent core 100 from occurring
Loose winding phenomenon, is avoided that again the serviceability affecting battery simultaneously.
As it is shown in figure 5, core 100 is coated with aluminum plastic film housing 200.Aluminum plastic film housing 200 includes nylon from outside to inside
Layer, aluminium lamination and CPP thin layer.Nylon layer is in outermost layer, and in order to prevent battery case from scratching, middle aluminium lamination is plastic-aluminum molding
Layer, is possible to prevent outside air and moisture to enter into inside battery；Innermost layer is CPP thin layer, in light light tone, is mainly used in electricity
The heat-seal in pond.
The high safe lithium ion battery of the present embodiment is additionally provided with electrolyte, electrolyte is added with additive
DMMP, to improve the heat stability of electrolyte, the content of the additive DMMP in electrolyte is 4 ~ 8%.
Above content is only preferred embodiment of the present utility model, for those of ordinary skill in the art, according to this reality
By novel thought, the most all will change, this specification content should not be construed as
To restriction of the present utility model.
Claims (7)
1. a high safe lithium ion battery, it is characterised in that include that core, described core include the positive pole of coiling and molding
Sheet, negative plate and the barrier film between described positive plate and described negative plate, described positive plate includes aluminium foil and is coated on
The first pulp layer on described aluminium foil, described first pulp layer includes compound LiMn2O4, and described compound LiMn2O4 is by LiMn2O4
Grain and the MA-AM oligomerisation nitride layer composition being coated on described lithium manganate particle surface, described compound LiMn2O4 passes through adhesive bond
On described aluminium foil；Described negative plate includes Copper Foil and the second pulp layer being coated on described Copper Foil, described second pulp layer
Including Delanium, described Delanium Surface coating has hard carbon layer, the thickness of described hard carbon layer to be 10 ~ 20 nanometers, described people
Make and on described Copper Foil, form described second pulp layer by adhesive bond after Graphite Coating has hard carbon layer.
High safe lithium ion battery the most according to claim 1, it is characterised in that described barrier film includes basement membrane and coating
Copolymer layer in a side of described basement membrane.
High safe lithium ion battery the most according to claim 2, it is characterised in that described copolymer layer is PVDF-
HFP/SiO2Copolymer layer.
High safe lithium ion battery the most according to claim 3, it is characterised in that described barrier film is provided with described copolymerization
The side of nitride layer is connected with described negative plate, and described barrier film deviates from the side of described copolymer layer and is connected with described positive plate.
High safe lithium ion battery the most according to claim 2, it is characterised in that the thickness of described basement membrane is 12 micro-
Rice.
6. according to the high safe lithium ion battery described in any one of claim 1 to 5, it is characterised in that described core terminates
The edge of winding is fixed by stop adhesive respectively.
7. according to the high safe lithium ion battery described in any one of claim 1 to 5, it is characterised in that described core outsourcing
It is covered with aluminum plastic film housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521142092.3U CN205680731U (en) | 2015-12-31 | 2015-12-31 | A kind of high safe lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521142092.3U CN205680731U (en) | 2015-12-31 | 2015-12-31 | A kind of high safe lithium ion battery |
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| Publication Number | Publication Date |
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| CN205680731U true CN205680731U (en) | 2016-11-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201521142092.3U Active CN205680731U (en) | 2015-12-31 | 2015-12-31 | A kind of high safe lithium ion battery |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109817886A (en) * | 2018-12-29 | 2019-05-28 | 深圳市卓能新能源股份有限公司 | Battery cathode sheet and preparation method thereof and lithium ion battery |
| CN111524713A (en) * | 2020-04-23 | 2020-08-11 | 西南科技大学 | Cylindrical lithium ion capacitor and preparation method thereof |
-
2015
- 2015-12-31 CN CN201521142092.3U patent/CN205680731U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109817886A (en) * | 2018-12-29 | 2019-05-28 | 深圳市卓能新能源股份有限公司 | Battery cathode sheet and preparation method thereof and lithium ion battery |
| CN111524713A (en) * | 2020-04-23 | 2020-08-11 | 西南科技大学 | Cylindrical lithium ion capacitor and preparation method thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: Room 101-501, Plant 9, Phase 1, No. 6, Xinhua Avenue, Chenjiang Street, Zhongkai High-tech Zone, Huizhou City, Guangdong Province, 516000 Patentee after: Huizhou Nuowei New Energy Co.,Ltd. Address before: Building 4, Fengfa Industrial Park, Wulian Village, Fenggang Town, Dongguan City, Guangdong Province, 523690 Patentee before: DONGGUAN NOVEL BATTERY TECHNOLOGY CO.,LTD. |
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| CP03 | Change of name, title or address |