CN203660004U - Square lithium-ion battery - Google Patents
Square lithium-ion battery Download PDFInfo
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- CN203660004U CN203660004U CN201320844577.1U CN201320844577U CN203660004U CN 203660004 U CN203660004 U CN 203660004U CN 201320844577 U CN201320844577 U CN 201320844577U CN 203660004 U CN203660004 U CN 203660004U
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- battery
- ion battery
- negative pole
- lithium ion
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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 discloses a square lithium-ion battery. The square lithium-ion battery comprises a positive pole and a negative pole which are arranged in an overlapping manner, wherein a diaphragm is clamped between the positive pole and the negative pole; insulating plates are fixedly welded at the head end and the tail end of the battery; the positive pole or the negative pole forms conductive connection with a battery shell by a collector or a negative terminal; electrolyte is contained in the diaphragm; the positive pole and the negative pole are respectively overlapped by 4 hours; one side of the collector and one side of the negative terminal are provided with anti-explosion safety devices which are in sealing connection with the battery shell by a sealing plate and the battery case; the anti-explosion safety device comprises an end cover with exhausting holes and a PTC (Positive Temperature Coefficient) element; and the quantity of the exhausting holes is 3-5. The square lithium-ion battery disclosed by the utility model has the advantages that the condition that the battery releases internal pressure and heat when meeting accidental events or emergent and unsafe factors is guaranteed, so that the safety of the battery is guaranteed and the accidents are avoided.
Description
Technical field
The utility model relates to lithium ion battery field, relates in particular to a kind of rectangular lithium ion battery.
Background technology
Accelerating transformation of the mode of economic development, under the economic development overall background that adjustment is optimized the economic structure, strategic new industry becomes the power of Future in China economic development just day by day, and lithium ion battery industry is the theme that current green low-carbon society advocates as energy-conserving and environment-protective and the core link that recycles.Minister of Science and Technology Wan Gang has provided the developing goal of New Energy Sources In China automobile: by 2012, in the automobile of domestic new production, 10% will be energy-conservation and new-energy automobile.Therefore, China's new-energy automobile in 2012 will reach the scale of producing 1400000 per year.If each vapour Vehicular dynamic battery is by 50,000 yuans of calculating, this can be the market of 70,000,000,000 scales.Lithium ion battery with its high voltage, high power capacity, have extended cycle life, the significant advantage such as security performance is good, become one of focus direction of high-energy battery research field in recent years.
Since nineteen ninety, Sony was by lithium ion battery commercialization, just progressively overcome through its shortcoming of the development of more than 20 years, performance is also more and more wide in continuous lifting application.At present, in the research field of lithium ion battery electrode material, its research direction one is to improve the chemical property of existing electrode material, so that the capacity of battery approaches its theoretical value, and obtains better cycle performance; The 2nd, research and develop new electrode materials to substitute existing electrode material, and make it obtain business-like application, after correlation technique obstacle is overcome, the more quantum jump application that lithium ion battery will obtain in performance also can be more wide.
Lithium ion battery can be divided into cylindrical battery, rectangular cell and button cell three major types type according to shape:
(1) column lithium ion battery: inside is takeup type utmost point group, plastic seal film carries out crimping with mechanical method and compresses to seal cap.Battery case cap is an assembly with multiple protection functions, includes the protection setting and the safety valve that overcharge, and wherein safety valve is mainly in the time of interior overtension and reach and automatically break and play the effect of protection;
(2) Fang Xing Li ion batteries: this section's battery is to be mainly applied in small-sized and slim power device, is representative mainly with the electrical appliance of cell phone type.Identical with Yuan Zhu Xing Li ion battery, lid is provided with safety valve and takeup type utmost point group, and different is that this battery has been realized the insulation between positive pole and housing, and it is metal-ceramic or metal material-glass that the positive terminal of this kind of battery adopts.
Rectangular lithium ion battery is all identical with column lithium ion battery in the technological process of producing, the different just sealing modes of two kinds of batteries: the compression sealing of what column lithium ion battery adopted is traditional edge-curled type, what rectangular lithium ion battery adopted is the welding method of laser type;
(3) fastening lithium ionic cell: similar with column lithium ion battery on composition, main member is also positive pole, negative pole barrier film, cover plate, electrolyte and sealing ring.
In the prior art, in the design of safeguard construction, conventional rectangular lithium ion battery safety problem is more outstanding, must adopt the mode of exitting more effectively, more rapidly, just can guarantee battery operated fail safe.And, can guarantee to run into incident at battery, or while meeting urgent unsafe factor, can effectively discharge cell internal pressure and heat, thereby guarantee the safety of battery, avoid occurring contingency.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, provides that a kind of volume is little, capacity is large, safe, the rectangular lithium ion battery that has extended cycle life.
For achieving the above object, the technical solution adopted in the utility model is:
A kind of rectangular lithium ion battery, it comprises the positive pole and the negative pole that overlap, between positive pole and negative pole, accompany barrier film, battery head and the tail two ends are welded and fixed insulation board, collector and the anodal one that forms, cathode terminal and negative pole form one, negative or positive electrode forms conduction by collector or cathode terminal with battery case and is connected, described barrier film inside comprises electrolyte, described barrier film is polypropylene/cellulose/polyethylene stratiform composite membrane, it is characterized in that: overlapping 4 layers respectively, described positive pole and negative pole, collector and cathode terminal one side are provided with anti-explosion safety device, anti-explosion safety device is tightly connected with battery container by sealing plate, anti-explosion safety device comprises the end cap and the PTC element that on it, are provided with steam vent, the quantity of described steam vent is 3-5.
In the another kind of lithium ion battery providing at the utility model, described positive pole comprises metal forming or wire netting, on it, scribble positive active material, described positive active material comprises cobalt acid lithium, lithium nickelate, LiMn2O4, or adopt transition metal to replace the some in above-mentioned composite oxides, described transition metal comprises manganese dioxide, vanadium pentoxide or iron sulfide.
In the another kind of lithium ion battery providing at the utility model, negative pole comprises metal forming or wire netting, scribbles negative electrode active material on it, and described negative electrode active material comprises the lithium intercalation compound of carbon based material, graphite, MCMB, lithium alloy and electronegative potential.
In the another kind of lithium ion battery providing at the utility model, being shaped as of described end cap is oval or square, described steam vent be shaped as ellipse, its focal length is 200-300 μ m.
Explosion-proof apparatus for breaking operation principle of the present utility model is to meet improper factor and while causing temperature anomaly to raise, the resistance of PTC element sharply increases when battery, and blocking-up electric current passes through, and simultaneously steam vent is discharged residual gas.
Technique effect of the present utility model is: adopted the common explosion-proof apparatus for breaking forming of PTC element and steam vent, this explosion-proof apparatus for breaking can guarantee to have the measure of prevent exploding after battery runs into incident.In the time that battery meets urgent unsafe factor, discharge interior pressure and heat, thereby guaranteed the safety of battery, avoid the accident of meeting accident.
Accompanying drawing explanation
Fig. 1 is structure cutaway view of the present utility model;
Fig. 2 is end cap enlarged drawing of the present utility model;
In figure, 1 is that positive pole, 2 is that negative pole, 3 is that barrier film, 4 is that insulation board, 5 is that collector, 6 is that cathode terminal, 7 is that shell, 8 is that PTC element, 9 is that steam vent, 10 is end cap.
Embodiment
Further illustrate the utility model below in conjunction with the drawings and specific embodiments.
The utility model as shown in Figure 1, a kind of rectangular lithium ion battery, it comprises the positive pole and the negative pole that overlap, between positive pole and negative pole, accompany barrier film, battery head and the tail two ends are welded and fixed insulation board, collector and the anodal one that forms, cathode terminal and negative pole form one, negative or positive electrode forms conduction by collector or cathode terminal with battery case and is connected, described barrier film inside comprises electrolyte, described barrier film is cellulose, polypropylene, polyethylene or their composite membrane, overlapping 4 layers respectively, described positive pole and negative pole, collector and cathode terminal one side are provided with anti-explosion safety device, anti-explosion safety device is tightly connected with battery container by sealing plate, anti-explosion safety device comprises the end cap and the PTC element that on it, are provided with steam vent.
End cap as shown in Figure 2, is ellipse, above has 4 oval steam vents, and the oval focal length of its steam vent is 250 μ m.
Above content is in conjunction with concrete preferred implementation further detailed description of the utility model, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, make without departing from the concept of the premise utility some substituting or obvious modification, and performance or purposes identical, all should be considered as belonging to protection range of the present utility model.
Claims (4)
1. a rectangular lithium ion battery, it comprises the positive pole (1) and the negative pole (2) that overlap, between anodal (1) and negative pole (2), accompany barrier film (3), battery head and the tail two ends are welded and fixed insulation slope (4), collector (5) and the anodal one that forms, cathode terminal (6) forms one with negative pole, negative or positive electrode forms conduction by collector or cathode terminal with battery case (7) and is connected, described barrier film inside comprises electrolyte, described barrier film is polypropylene/cellulose/polyethylene stratiform composite membrane, it is characterized in that: overlapping 4 layers respectively, described positive pole and negative pole, collector and cathode terminal one side are provided with anti-explosion safety device, anti-explosion safety device is tightly connected with battery container by sealing plate, anti-explosion safety device comprises PTC element (8) and on it, is provided with the end cap (10) of steam vent (9), the quantity of described steam vent is 3-5.
2. a kind of rectangular lithium ion battery according to claim 1, is characterized in that: described positive pole comprises metal forming or wire netting, scribbles positive active material on it.
3. a kind of rectangular lithium ion battery according to claim 1 and 2, is characterized in that: described negative pole comprises metal forming or wire netting, scribbles negative electrode active material on it.
4. a kind of rectangular lithium ion battery according to claim 1, is characterized in that: being shaped as of described end cap is oval or square, described steam vent be shaped as ellipse, its focal length is 200-300 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320844577.1U CN203660004U (en) | 2013-12-20 | 2013-12-20 | Square lithium-ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320844577.1U CN203660004U (en) | 2013-12-20 | 2013-12-20 | Square lithium-ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203660004U true CN203660004U (en) | 2014-06-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320844577.1U Expired - Fee Related CN203660004U (en) | 2013-12-20 | 2013-12-20 | Square lithium-ion battery |
Country Status (1)
| Country | Link |
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| CN (1) | CN203660004U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110299249A (en) * | 2019-06-11 | 2019-10-01 | 成都凹克新能源科技有限公司 | A kind of electrochemical energy storing device |
-
2013
- 2013-12-20 CN CN201320844577.1U patent/CN203660004U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110299249A (en) * | 2019-06-11 | 2019-10-01 | 成都凹克新能源科技有限公司 | A kind of electrochemical energy storing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140618 Termination date: 20161220 |
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| CF01 | Termination of patent right due to non-payment of annual fee |