CN204303938U - High safe dynamic lithium battery - Google Patents
High safe dynamic lithium battery Download PDFInfo
- Publication number
- CN204303938U CN204303938U CN201420841704.7U CN201420841704U CN204303938U CN 204303938 U CN204303938 U CN 204303938U CN 201420841704 U CN201420841704 U CN 201420841704U CN 204303938 U CN204303938 U CN 204303938U
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- Prior art keywords
- barrier film
- positive
- negative
- material layer
- ceramic
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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
The utility model discloses a kind of stable performance, the safe dynamic lithium battery of the height that power stage density is high.Comprise housing, core body, described core body is by comprising cobalt acid lithium, LiMn2O4, nickel cobalt lithium aluminate, the positive plate of LiFePO 4 or lithium vanadate material, comprise the negative plate of graphite or lithium titanate material, reel with Ceramic Composite barrier film and form, described Ceramic Composite barrier film comprises diaphragm body, described diaphragm body comprises barrier film basic unit, and the ceramic material layer be located in this barrier film basic unit, described barrier film basic unit comprises surface treated composite porous film material layer, and be located at the copolymer layer of the differentiated compound on this surface treated composite porous film material layer, described ceramic material layer comprises the ceramic material through nanometer process.
Description
Technical field
The utility model relates to a kind of lithium battery, particularly relates to a kind of high safe dynamic lithium battery.
Background technology
Along with lithium electricity is more and more widely used in every field, particularly at some special dimension electrical appliances, higher field is required to power density, volume energy density, security performance.At present, the capacity of the main still battery of key factor that restriction dynamic lithium battery is better applied and power, how improving the chargeable use capacity of lithium battery and power, the power stage density improving lithium battery, the safety and reliability that improves volume energy density, improve the use of battery, is the target of field of lithium development and pursuit.And the barrier film of existing dynamic lithium battery etc. is in battery charge and discharge process, even if organic counterdie melts, inorganic coating still can keep the integrality of barrier film, prevent the appearance of large area positive/negative short circuit phenomenon, the barrier film making this organic/inorganic compound can improve the security performance of powerful lithium battery to a greater extent.
Utility model content
The purpose of this utility model is the deficiency existed for prior art, provides a kind of high safe dynamic lithium battery.This electrokinetic cell use safety, reliable, capacity is large, and stable performance, power stage density is high.Its Ceramic Composite barrier film can improve the security performance of lithium-ion-power cell, improves the heat resistance etc. of lithium ion battery, and the consistency of battery pack during combination of monomers; This lithium battery stable performance, safety, reliable.
The technical solution of the utility model comprises housing, core body, described core body is by comprising cobalt acid lithium, LiMn2O4, nickel cobalt lithium aluminate, the positive plate of LiFePO 4 or lithium vanadate material, comprise the negative plate of graphite or lithium titanate material, reel with Ceramic Composite barrier film and form, described Ceramic Composite barrier film comprises diaphragm body, described diaphragm body comprises barrier film basic unit, and the ceramic material layer be located in this barrier film basic unit, described barrier film basic unit comprises surface treated composite porous film material layer, and be located at the copolymer layer of the differentiated compound on this surface treated composite porous film material layer, described ceramic material layer comprises the ceramic material through nanometer process.
Described Ceramic Composite barrier film comprises polyolefinic micro-porous film layer and is located at the metal oxide layer on this polyolefinic micro-porous film layer two sides respectively, and described core body is made up of positive plate, Ceramic Composite barrier film and negative plate along the axial direction stacked winding that is shifted toward one end successively that reels.
The positive and negative lug be connected with described positive and negative plate is respectively positive and negative board-like lug, described positive and negative board-like lug corresponds to the displacement position of positive and negative plate respectively wall from the two ends of core body contacts with whole of positive and negative plate and is welded to connect with sharp finish side, described positive and negative board-like lug is a U-shaped shape, and the positive and negative board-like lug in U type shape connects to wall whole the laser welding at the corresponding displacement position of positive and negative plate from its two ends correspondence respectively.
The power stage density of the utility model lithium battery is large, and volume energy density is large; Particularly adopt ceramic barrier film, can not potential safety hazard be there is when the inside that battery operated or external cause cause or external high temperature; In addition, use in board-like lug and respectively with positive/negative plate one or both sides whole laser welding, positive/negative plate can be avoided to draw the insecure problem of contact that position often occurs and the superheating phenomenon produced in welding position because electric current is excessive; And its shell structure can improve sealing property.
Ceramic Composite barrier film is with the barrier film of organic counterdie/inorganic coating compound, in battery charge and discharge process, even if organic counterdie melts, inorganic coating still can keep the integrality of barrier film, prevent the appearance of large area positive/negative short circuit phenomenon, lithium ion battery heat resistance can not only be improved, reduce the probability that lithium ion battery occurs as electrokinetic cell potential safety hazard; And lithium ion single battery with two side terminals can be improved, be beneficial to combinationally using of battery.
Accompanying drawing explanation
Fig. 1 is the structure of the core body of the high safe dynamic lithium battery of the utility model and positive and negative board-like lug thereof and corresponding positive/negative plate syndeton schematic diagram; Fig. 2 is high safe dynamic lithium battery shell structure schematic diagram; Fig. 3 is positive plate in another embodiment of the utility model and corresponding anode ear syndeton schematic diagram.Fig. 4 is the Ceramic Composite barrier film structural representation of high safe another embodiment of dynamic lithium battery of the utility model.
Embodiment
Now by embodiment, also the utility model is described in further detail by reference to the accompanying drawings.As Figure 1-4, the high safe dynamic lithium battery of the present embodiment comprises housing, core bodys etc., its core body forms square core body 7 toward core body one end displacement (dislocation) stacked winding from positive plate 1, Ceramic Composite barrier film 3 and negative plate 2 successively respectively one by one along winding axial direction.
The wall of just board-like lug 4 from whole of one end plate face with the dislocation position 1a of positive plate 1 end by square core body 7 one end contacts and is welded to connect with sharp finish side, and the wall of negative board-like lug 5 from whole of one end plate face with the dislocation position of negative plate 2 end by the relative other end of square core body 7 contacts and be welded to connect with sharp finish side.
The other end of positive and negative board-like lug 4,5 is outwards drawn by the insulation position of corresponding positive and negative electrode post 4a, 5a two end cover plate 8 of self stretch aluminum hull 6 respectively respectively.
Wall thickness is that the internal face of the stretching aluminum hull 6 of 0.1 ~ 0.5 millimeter is coated with insulating layer coating; The two end cover plate 8 internal face surrounding of stretching aluminum hull 6 is provided with step surface 10, and two end cover plate 8 forms lenticular sealing with the shell wall end face 9 of the respective end of stretching aluminum hull 6 by seal by its step surface 10.
The Ceramic Composite barrier film (diaphragm body) 3 of the present embodiment comprises barrier film basic unit and forms with the ceramic material layer 13 being located at this barrier film basic unit two sides; Barrier film basic unit by through ultraviolet expanding treatment, the polypropylene that stretches or polyethylene composite porous film material layer 11, and be sprayed at this through ultraviolet expanding treatment, the molecular weight on relative two sides of the polypropylene that stretches or polyethylene composite porous film material layer 11 is that the polyacrylate dispersion of 30 ~ 1,200,000 or the copolymer layer 12 of Kynoar macromolecular compound are made; Ceramic material layer is by ceramic material α-Al
2o
3with SiO
2make to carry out nanometer process after the mixing of the weight ratio of 65% ~ 96%:35% ~ 4%.
It makes especially by following process:
First respectively by ceramic material α-Al
2o
3with SiO
2carrying out nanometer process after above-mentioned weight ratio mixing and make ceramic material compound, is that polyacrylate dispersion or the Kynoar of 30 ~ 1,200,000 makes polymer ceramic adheres agent emulsion by molecular weight; By above-mentioned molecular weight be 30 ~ 1,200,000 polyacrylate dispersion or the Kynoar N-methylpyrrole macromolecule solvent that adds a certain amount of (being as the criterion to facilitate spraying) make high polymer binder emulsion, the polypropylene of stretching or polyethylene composite porous film material are carried out ultraviolet expanding treatment and make composite porous film material layer 11; After relative two surfaces of the composite porous film material layer 11 made are respectively with the above-mentioned high polymer binder emulsion made of the thickness of 0.3 ~ 0.5 micron coating, carry out dry process again, form the copolymer layer 12 of macromolecular compound in composite porous film material layer 11 two sides and then make diaphragm matrix; Undertaken being mixed and made into ceramic size by the solid content ratio of 80% ~ 96%:20% ~ 4% with the above-mentioned polymer ceramic adheres agent emulsion made after again the ceramic material compound made being carried out nanometer process, this ceramic size is carried out drying process with the thickness extrusion coated of 1 ~ 1.5 micron, shows (wall) face formation ceramic material layer 13 in diaphragm matrix two respectively behind the relative two sides of the above-mentioned diaphragm matrix made; The copolymer layer of this ceramic material layer be formed in barrier film basic unit and macromolecular compound is carried out to the disposal of stability of hot pressing compound in the temperature range of 40 DEG C ~ 60 DEG C, namely make diaphragm body.
In another embodiment of the present utility model, ceramic material α-Al
2o
3with SiO
2,weight ratio is that 75% ~ 89%:25% ~ 11% ratio mixes, ceramic material adhesive to be molecular weight be 60,80 or 1,000,000 polyacrylate dispersion or Kynoar, ceramic material after nanometer process is 70% ~ 86%:30% ~ 14% with the solid content ratio of polymer ceramic adheres agent emulsion, and it is 1.1,1,3 or 1.5 micron, every face that thickness is carried out in the painting of ceramic size; Its high polymer binder of the copolymer layer of macromolecular compound to be molecular weight be 40,80 or 1,200,000 polyacrylate dispersion or Kynoar, every face coating thickness of the emulsion of high polymer binder is 0.35,0.4 or 0.45 micron; Composite porous film material be through ultraviolet expanding treatment, the polyethylene of stretching of porosity 40%, 45% or 50% and the porous film material of polypropylene composite materials; The temperature of the ceramic material layer of barrier film basic unit and the copolymer layer of macromolecular compound being carried out to hot pressing compound is 45,52 or 58 DEG C; All the other structures and manufacture craft can with above-described embodiment roughly the same.
Lithium battery of the present utility model comprises positive plate, negative plate and barrier film winding and forms, and described barrier film is above-mentioned high safe ceramics composite isolated film of the present utility model.
In another embodiment of the utility model as shown in Figure 4, just board-like lug 4 is bending in being similar to U-shaped shape respectively, is similar to U-shaped just board-like lug 4 and is welded to connect with sharp finish side to two corresponding walls of the dislocation position 1a of positive plate 1 end by square core body 7 one end respectively from its two end plates face; Equally, be similar to U-shaped negative board-like lug to be welded to connect with sharp finish side relative to two corresponding walls at the dislocation position of the negative plate end of the other end to by core body from its two end plates face.
Be similar to U-shaped just board-like lug 4 to be connected with positive electricity pole 4a from its bend correspondence respectively, drawn from the two ends of housing by positive electricity pole 4a.The connection of negative board-like lug and just board-like lug roughly the same.
The utility model is again in an embodiment, its Ceramic Composite barrier film can by the polymer film of the micro-porous film material two sides modification of polyolefin (Polyolefin), and is coated with that to carry out on the relative two sides of polymer film of the micro-porous film material two sides modification of polyolefin (Polyolefin), thickness be that the metal oxide layer of 1 ~ 2 μm is formed.
Claims (3)
1. one kind high safe dynamic lithium battery, comprise housing, core body, it is characterized in that described core body is by comprising cobalt acid lithium, LiMn2O4, nickel cobalt lithium aluminate, the positive plate of LiFePO 4 or lithium vanadate material, comprise the negative plate of graphite or lithium titanate material, reel with Ceramic Composite barrier film and form, described Ceramic Composite barrier film comprises diaphragm body, described diaphragm body comprises barrier film basic unit, and the ceramic material layer be located in this barrier film basic unit, described barrier film basic unit comprises surface treated composite porous film material layer, and be located at the copolymer layer of the differentiated compound on this surface treated composite porous film material layer, described ceramic material layer comprises the ceramic material through nanometer process.
2. high safe dynamic lithium battery according to claim 1, it is characterized in that described Ceramic Composite barrier film comprises polyolefinic micro-porous film layer and is located at the metal oxide layer on this polyolefinic micro-porous film layer two sides respectively, described core body is made up of positive plate, Ceramic Composite barrier film and negative plate along the axial direction stacked winding that is shifted toward one end successively that reels.
3. high safe dynamic lithium battery according to claim 1, it is characterized in that the positive and negative lug be connected with described positive and negative plate is respectively positive and negative board-like lug, described positive and negative board-like lug corresponds to the displacement position of positive and negative plate respectively wall from the two ends of core body contacts with whole of positive and negative plate and is welded to connect with sharp finish side, described positive and negative board-like lug is a U-shaped shape, and the positive and negative board-like lug in U type shape connects to wall whole the laser welding at the corresponding displacement position of positive and negative plate from its two ends correspondence respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420841704.7U CN204303938U (en) | 2014-12-27 | 2014-12-27 | High safe dynamic lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420841704.7U CN204303938U (en) | 2014-12-27 | 2014-12-27 | High safe dynamic lithium battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204303938U true CN204303938U (en) | 2015-04-29 |
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ID=53109456
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420841704.7U Expired - Fee Related CN204303938U (en) | 2014-12-27 | 2014-12-27 | High safe dynamic lithium battery |
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|---|---|
| CN (1) | CN204303938U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108511785A (en) * | 2018-05-28 | 2018-09-07 | 名添科技（深圳）有限公司 | A kind of dynamic lithium battery of anti-bulge |
-
2014
- 2014-12-27 CN CN201420841704.7U patent/CN204303938U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108511785A (en) * | 2018-05-28 | 2018-09-07 | 名添科技（深圳）有限公司 | A kind of dynamic lithium battery of anti-bulge |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 336000 Yichun Economic Development Zone, Jiangxi Road, No. 21 Patentee after: Yichun Jinhui Chemical Limited by Share Ltd Address before: 336000 Yichun Economic Development Zone, Jiangxi Road, No. 21 Patentee before: YICHUN JINHUI NEW ENERGY MATERIALS CO., LTD. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150429 Termination date: 20191227 |