CN102208678A - Safe lithium ion battery - Google Patents
Safe lithium ion battery Download PDFInfo
- Publication number
- CN102208678A CN102208678A CN2011100973303A CN201110097330A CN102208678A CN 102208678 A CN102208678 A CN 102208678A CN 2011100973303 A CN2011100973303 A CN 2011100973303A CN 201110097330 A CN201110097330 A CN 201110097330A CN 102208678 A CN102208678 A CN 102208678A
- Authority
- CN
- China
- Prior art keywords
- lithium ion
- ion battery
- ptc
- current collector
- conductive film
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
Landscapes
- Secondary Cells (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention discloses a safe lithium ion battery, which comprises an anode system, a cathode system, a membrane spaced between an anode and a cathode, and an electrolyte system, wherein the anode system comprises an anode current collector and a membrane attached to the anode current collector and containing an anode active substance; the cathode system comprises a cathode current collector and a membrane attached to the cathode current collector and containing a cathode active substance; an organic conductive film is used as the current collector in one or both of the anode system and the cathode system; and a polymer matrix with positive temperature coefficient (PTC) thermistor property is adopted in the organic conductive film. The organic conductive film has the PTC thermistor property. The lithium ion battery can avoid the safety problems of battery combustion and even explosion and the like caused by over charge and battery temperature rise due to external short circuit.
Description
Technical field
The present invention relates to a kind of battery, particularly relate to a kind of have prevent because of overcharge, the lithium ion battery of the high security feature of burning that the improper use of external short circuit causes even blast.
Background technology
The employed electrolyte of current commercialization lithium ion battery is mainly organic electrolyte, because organic electrolyte is inflammable, uses the lithium ion battery of organic electrolyte to have potential safety hazard in use.The user is because not enough to lithium ion battery potential safety hazard understanding, the improper operating position that external short circuit often occurs, overcharges, then cause that lithium ion battery Yin Wendu raises and burns, even blast, not only cause huge personal injury to the user, and because the generation of this class individual case, lithium electricity business men has to recall the battery of having sold in a large number, bears enormous economic loss.
According to the technical merit of present variety classes lithium ion battery, in very long a period of time, the organic electrolyte lithium ion battery will be the leading of market.Be the safety problem that people such as prevent external short circuit, overcharge is caused for the improper use situation, industry has been done a lot of work.
Adding anti-overcharge additive in the electrolyte is one of more method of research.Its anti-overcharge principle has two classes; one class is a redox shuttle; another kind of is electropolymerization; can avoid overcharging, crossing and put of little electric current to a certain extent though prevent the adding of additive; limited for the effect under the overcharge conditions under the big current conditions, and the adding of anti-overcharge additive can cause harmful effects such as the decline, self discharge increase of reduction, the high rate performance of discharge capacity of the cell usually.
Also having a class effective method is to add the PTC element in the battery charging and discharging loop.As being connected self-healing fuse PTC (patent CN201466143U) between electric core negative pole and baffle; The built-in PTC of rectangular lithium ion battery monomer does negative pole drainage strip (CN2762362Y) with PTC; Lug adopts sheet metal and is arranged at the ptc layer (CN101887960A) on sheet metal surface; As for inside lithium ion cell, one lead-in wire directly or by lead is connected with the collector of the moon/anode of battery with PTC, and another goes between and draws with battery external that lead is connected or directly draw lead (CN2599767Y) as battery; Other most of patents all are located at the PTC element electric core outside.
The present invention is with one of plus plate current-collecting body and negative current collector or all with the good organic substance PTC conductive film replacement of conductive capability, the temperature that this design is responded to PTC is consistent with internal temperature of battery, eliminate the temperature difference, can make the PTC switch motion more rapidly effectively, because enlarging, the expansion space also make the PTC expanded by heating unrestricted simultaneously, can cut off in time that lithium ion battery overcharges, short circuit electric circuit, thereby avoid temperature to continue the safety problem that raises and cause.
In addition, imines class lithium salts as LiTFSI, is compared LiPF
6, have higher thermal stability (350 ℃ of decomposition), facile hydrolysis does not have fine compatibility with graphite cathode, can form Low ESR and stable SEI film, but it has corrosivity to the Al collector, thereby does not generally use.Thunder is stepped on the alternative aluminium foil of use graphite foil such as Marc Jozkow of new forms of energy company and is done collector, substitutes LiPF with the amine lithium salts
6, battery high-temperature behavior and cycle performance all greatly improve.The present invention uses the organic PTC conductive film to do plus plate current-collecting body, does not have the corrosion of Al collector, can use LiTFSI as electrolyte lithium salt, and this is another obtained big benefit of the present invention.Use electroconductive organic film to do collector, also help the burr that produces when reducing the pole piece cutting, and be difficult for falling material, also help improving battery security and cyclicity.
Summary of the invention
Technical problem to be solved by this invention provide a kind of have prevent to overcharge, the caused burning of improper use of external short circuit even the safety-type lithium ion battery of explosion safety problem.
In order to solve the problems of the technologies described above, safety-type lithium ion battery provided by the invention, comprise anodal system, the negative pole system and be interval in positive pole and negative pole between barrier film and electrolyte system, anodal system comprises plus plate current-collecting body and attached to the diaphragm that contains positive active material on the plus plate current-collecting body, the negative pole system comprises negative current collector and attached to the diaphragm that contains negative electrode active material on the negative current collector, one of described anodal system and negative pole system or all adopt the organic substance conductive film as collector, and described organic substance conductive film adopts the polymeric matrix with PTC thermistor characteristic.
The polymeric matrix of the described PTC of having thermistor characteristic is one or more the mixture in silica gel, natural rubber, Nitrile Rubber, polyurethane, polyvinyl ester, polypropylene ester, polyether-ether-ketone, Merlon, Kynoar, the poly(ethylene oxide); Conductive filler is one or more the mixture in graphite, carbon black, carbon fiber, the metal dust, and the content of conductive filler is 20-80wt.%.
Described organic substance conductive film is a polypropylene PTC conductive film, and its PTC switch temperature is 165-176 ℃; When the plus plate current-collecting body, conductive filler or conductive coating are electric conductor with one or more the mixture in Al, carbon black, carbon fiber, the graphite; When the negative current collector, conductive filler or conductive coating are electric conductor with one or more the mixture in Cu, carbon black, carbon fiber, the graphite, and electric conductor content is 40-60wt.%.
Described plus plate current-collecting body adopts the conducting polypropylene film with PTC effect, conductive filler is one or more in graphite, carbon black, the carbon fiber, used electrolyte solvent is at least two kinds a mixture among EC, PC, EMC, DMC, the DEC, and electrolyte lithium salt adopts LiN (SO
2CF
3)
2(LiTFSI), LiN (SO
2C
2F
5)
2(LiBETI), LiN (SO
2F
2) (LiFSI), LiCF
3SO
3In at least a and derivative, lithium salt 0.6-1.2mol/L.
Adopt the safety-type lithium ion battery of technique scheme; polymeric matrix has PTC thermistor characteristic; when temperature was elevated to uniform temperature (Curie temperature), its resistance was step evolution with increasing of temperature and increases, thereby played the protective effect when too high of battery overcurrent or temperature.And use electroconductive organic film to do collector, also help the burr that produces when reducing the pole piece cutting, and be difficult for falling material.The plus plate current-collecting body that proposes based on the present invention when one or more in adopting carbon black, graphite, carbon fiber are done conductive filler, can be used LiTFSI etc. and exist the electrolyte lithium salt of corrosion to substitute LiPF to traditional Al collector
6Compare traditional LiPF
6Electrolyte has higher thermal stability, and facile hydrolysis not, does not produce HF, thereby has improved the fail safe and the cyclicity of battery.
Embodiment
The invention is further illustrated by the following examples, and the present invention is not limited only to described embodiment.
Embodiment 1:
According to specification requirement, to use the thick polypropylene PTC conductive film of 40 μ m and make plus plate current-collecting body, conductive filler is a carbon black, content is 45wt.%, adopts business-like LiMn
2O
4Do positive electrode active materials, anodal batching is by active material: carbon black: the weight ratio of bonding agent=80: 12: 8 is carried out mixed slurry, evenly is coated on the polyethylene film, dries in 80 ℃ of vacuum tanks and makes electrode.Adopt business-like Delanium to do negative pole, cathode blending is by active material: carbon black: the weight ratio of bonding agent=86: 8: 6 is carried out mixed slurry, evenly apply with thickness be on the thick Copper Foil collector of 15 μ m, dry at 120 ℃ and make electrode.Then these two kinds of electrodes are cut according to specification, matched group is dressed up 18650 batteries, and the barrier film that is adopted is commercial lithium ion battery separator, and electrolyte is 1MLiPF
6/ (EC+EMC+DMC) solution.In the 2.2-4.0V voltage range, work.Discharging current 1C capacity is 1.8Ah.By the GB/T18287-2000 testing standard to battery overcharge, cross put, short-circuit test, when case temperature was elevated to 150 ℃, circuit was protected.
Embodiment 2:
According to specification requirement, to use the thick polypropylene PTC conductive film of 40 μ m and make negative current collector, conductive filler is Cu, content is 45wt%.The both positive and negative polarity formulation for coating material is identical with embodiment 1, and anode sizing agent evenly is coated on the aluminum foil current collector of 25 μ m, dries at 120 ℃ and makes electrode.Cathode size evenly is coated on the polyethylene film, and electrode is made in oven dry in 80 ℃ of vacuum drying chambers.All the other make 18650 batteries with embodiment 1, and discharging current 1C capacity is 1.9Ah, by the GB/T18287-2000 testing standard to battery overcharge, cross put, short-circuit test, when case temperature was elevated to about 150 ℃, circuit was protected.
Embodiment 3:
According to specification requirement, to use the thick polypropylene PTC of 50 μ m conductive film and do the both positive and negative polarity collector, the plus plate current-collecting body conductive filler adopts carbon black, and negative pole adopts Cu, and content is 50%.The both positive and negative polarity prescription is identical with embodiment 1, and electrode is made in oven dry in 80 ℃ of vacuum drying chambers.All the other make 18650 batteries with embodiment one, and discharging current 1C capacity is 1.7Ah, by the GB/T18287-2000 testing standard to battery overcharge, cross put, short-circuit test, when case temperature was elevated to about 150 ℃, circuit was protected.
Embodiment 4:
According to specification requirement, to use the thick polypropylene PTC conductive film of 40 μ m and make plus plate current-collecting body, conductive filler is a carbon black, and content is 50wt.%, and electrolyte is 1MLiTFSI/ (EC+EMC+DMC) solution, and all the other make 18650 batteries with embodiment 1.Discharging current 1C capacity is 1.8Ah.By the GB/T18287-2000 testing standard to battery overcharge, cross put, short-circuit test, when case temperature was elevated to 150, circuit was protected.With employing LiPF
6Electrolyte battery compare, the 1C cycle performance is greatly improved, with 80% by capacity be standard, cycle-index is brought up to 850 times by 450 times.
Claims (4)
1. safety-type lithium ion battery, comprise anodal system, the negative pole system and be interval in positive pole and negative pole between barrier film and electrolyte system, anodal system comprises plus plate current-collecting body and attached to the diaphragm that contains positive active material on the plus plate current-collecting body, the negative pole system comprises negative current collector and attached to the diaphragm that contains negative electrode active material on the negative current collector, it is characterized in that: one of described anodal system and negative pole system or all adopt the organic substance conductive film as collector, and described organic substance conductive film adopts the polymeric matrix with PTC thermistor characteristic.
2. safety-type lithium ion battery according to claim 1 is characterized in that: the polymeric matrix of the described PTC of having thermistor characteristic is one or more the mixture in silica gel, natural rubber, Nitrile Rubber, polyurethane, polyvinyl ester, polypropylene ester, polyether-ether-ketone, Merlon, Kynoar, the poly(ethylene oxide); Conductive filler is one or more the mixture in graphite, carbon black, carbon fiber, metal dust or the fiber, and the content of conductive filler is 20-80wt.%.
3. safety-type lithium ion battery according to claim 2 is characterized in that: described organic substance conductive film is a polypropylene PT C conductive film, and its PTC switch temperature is 165-176 ℃; When the plus plate current-collecting body, conductive filler or conductive coating are electric conductor with one or more the mixture in Al, carbon black, carbon fiber, the graphite; When the negative current collector, conductive filler or conductive coating are electric conductor with one or more the mixture in Cu, carbon black, carbon fiber, the graphite, and electric conductor content is 40-60wt.%.
4. safety-type lithium ion battery according to claim 1, it is characterized in that: described plus plate current-collecting body adopts the conducting polypropylene film with PTC effect, conductive filler is one or more in graphite, carbon black, the carbon fiber, used electrolyte solvent is at least two kinds a mixture among EC, PC, EMC, DMC, the DEC, and electrolyte lithium salt adopts LiN (SO
2CF
3)
2(LiTFSI), LiN (SO
2C
2F
5)
2(LiBETI) LiN (SO
2F
2) (LiFSI), LiCF
3SO
3In at least a and derivative, lithium salt 0.6-1.2mol/L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100973303A CN102208678A (en) | 2011-04-19 | 2011-04-19 | Safe lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100973303A CN102208678A (en) | 2011-04-19 | 2011-04-19 | Safe lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102208678A true CN102208678A (en) | 2011-10-05 |
Family
ID=44697396
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100973303A Pending CN102208678A (en) | 2011-04-19 | 2011-04-19 | Safe lithium ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102208678A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102683745A (en) * | 2012-03-01 | 2012-09-19 | 华瑞(新乡)化工有限公司 | Method for preparing electrolyte of novel 5V lithium ion battery |
| CN103872401A (en) * | 2014-04-02 | 2014-06-18 | 联想(北京)有限公司 | Battery and electronic device |
| CN104409681A (en) * | 2014-11-19 | 2015-03-11 | 上海航天电源技术有限责任公司 | Preparation method of lithium ion battery pole piece containing PTC coating |
| CN105810950A (en) * | 2014-12-30 | 2016-07-27 | 苏州宝时得电动工具有限公司 | Battery |
| CN105845968A (en) * | 2016-04-15 | 2016-08-10 | 惠州市聚鼎电子有限公司 | Safe battery and manufacturing method thereof |
| CN106558676A (en) * | 2017-01-17 | 2017-04-05 | 上海长园维安电子线路保护有限公司 | Lithium battery collector with defencive function |
| CN107565137A (en) * | 2017-07-03 | 2018-01-09 | 北京卫蓝新能源科技有限公司 | A kind of collector and pole piece, solid state battery containing the collector |
| CN107666014A (en) * | 2016-07-28 | 2018-02-06 | 万向二三股份公司 | A kind of safety-type soft package lithium ion cell polar ear |
| CN107768597A (en) * | 2017-10-10 | 2018-03-06 | 珠海格力电器股份有限公司 | A kind of battery pole piece and preparation method thereof, battery |
| CN109244513A (en) * | 2017-07-10 | 2019-01-18 | 现代自动车株式会社 | Fuel cell and preparation method thereof |
| US10950912B2 (en) | 2017-06-14 | 2021-03-16 | Milwaukee Electric Tool Corporation | Arrangements for inhibiting intrusion into battery pack electrical components |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5843592A (en) * | 1996-10-23 | 1998-12-01 | Valence Technology, Inc. | Current collector for lithium ion electrochemical cell |
| CN1406401A (en) * | 2000-12-28 | 2003-03-26 | 松下电器产业株式会社 | Nonaqueous electrolytic secondary battery |
-
2011
- 2011-04-19 CN CN2011100973303A patent/CN102208678A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5843592A (en) * | 1996-10-23 | 1998-12-01 | Valence Technology, Inc. | Current collector for lithium ion electrochemical cell |
| CN1406401A (en) * | 2000-12-28 | 2003-03-26 | 松下电器产业株式会社 | Nonaqueous electrolytic secondary battery |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102683745A (en) * | 2012-03-01 | 2012-09-19 | 华瑞(新乡)化工有限公司 | Method for preparing electrolyte of novel 5V lithium ion battery |
| CN103872401A (en) * | 2014-04-02 | 2014-06-18 | 联想(北京)有限公司 | Battery and electronic device |
| CN104409681A (en) * | 2014-11-19 | 2015-03-11 | 上海航天电源技术有限责任公司 | Preparation method of lithium ion battery pole piece containing PTC coating |
| CN105810950A (en) * | 2014-12-30 | 2016-07-27 | 苏州宝时得电动工具有限公司 | Battery |
| CN105845968A (en) * | 2016-04-15 | 2016-08-10 | 惠州市聚鼎电子有限公司 | Safe battery and manufacturing method thereof |
| CN107666014A (en) * | 2016-07-28 | 2018-02-06 | 万向二三股份公司 | A kind of safety-type soft package lithium ion cell polar ear |
| CN106558676A (en) * | 2017-01-17 | 2017-04-05 | 上海长园维安电子线路保护有限公司 | Lithium battery collector with defencive function |
| US11916203B2 (en) | 2017-06-14 | 2024-02-27 | Milwaukee Electric Tool Corporation | Arrangements for inhibiting intrusion into battery pack electrical components |
| US11923514B2 (en) | 2017-06-14 | 2024-03-05 | Milwaukee Electric Tool Corporation | Arrangements for inhibiting intrusion into battery pack electrical components |
| US11777151B2 (en) | 2017-06-14 | 2023-10-03 | Milwaukee Electric Tool Corporation | Arrangements for inhibiting intrusion into battery pack electrical components |
| US10950912B2 (en) | 2017-06-14 | 2021-03-16 | Milwaukee Electric Tool Corporation | Arrangements for inhibiting intrusion into battery pack electrical components |
| US11031651B2 (en) | 2017-06-14 | 2021-06-08 | Milwaukee Electric Tool Corporation | Arrangements for inhibiting intrusion into battery pack electrical components |
| CN107565137A (en) * | 2017-07-03 | 2018-01-09 | 北京卫蓝新能源科技有限公司 | A kind of collector and pole piece, solid state battery containing the collector |
| CN109244513B (en) * | 2017-07-10 | 2022-07-15 | 现代自动车株式会社 | Fuel cell and method for producing the same |
| CN109244513A (en) * | 2017-07-10 | 2019-01-18 | 现代自动车株式会社 | Fuel cell and preparation method thereof |
| CN107768597B (en) * | 2017-10-10 | 2023-10-20 | 珠海格力电器股份有限公司 | Battery pole piece, preparation method thereof and battery |
| CN107768597A (en) * | 2017-10-10 | 2018-03-06 | 珠海格力电器股份有限公司 | A kind of battery pole piece and preparation method thereof, battery |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102208678A (en) | Safe lithium ion battery | |
| CN203218375U (en) | Lithium ion battery pole piece and lithium ion battery | |
| CN109585921B (en) | Lithium ion battery non-aqueous electrolyte and lithium ion battery | |
| CN102709589A (en) | Lithium ion battery and electrolyte thereof | |
| CN104538650A (en) | Modified lithium/carbon fluoride battery | |
| KR20140039208A (en) | High capacitance lithium ion battery containing metallic conducting materials | |
| Zhang et al. | Poly (3-butylthiophene)-based positive-temperature-coefficient electrodes for safer lithium-ion batteries | |
| CN105470515A (en) | Positive electrode of safe lithium-ion power battery and lithium-ion battery comprising positive electrode | |
| WO2019080258A1 (en) | Lithium secondary battery electrolyte and lithium secondary battery thereof | |
| CN105514521A (en) | Lithium ion battery with temperature regulation function | |
| CN109088033B (en) | High-safety high-energy long-cycle lithium iron phosphate 18650 lithium battery and preparation method thereof | |
| CN110808403B (en) | Overcharge-preventing lithium ion battery | |
| CN101740758A (en) | Preparation method of vulcanized conducting polymer composite anode for lithium ion battery | |
| CN114024034A (en) | Battery with a battery cell | |
| WO2016029379A1 (en) | Fluorine-substituted propylene carbonate-based electrolyte and lithium-ion battery | |
| CN110931871A (en) | High-temperature-resistant electrolyte adaptive to silicon-carbon negative electrode material for lithium ion battery | |
| CN102544578A (en) | Lithium ion battery capable of improving comprehensive performance | |
| CA3133860A1 (en) | A solid-liquid battery comprising a lithium negative electrode and electrolyte solutions | |
| CN105932207B (en) | Lithium ion battery is reversible to overcharge protection gelatin polymer composite diaphragm and preparation method thereof | |
| CN113422111A (en) | Electrolyte and lithium ion battery containing same | |
| CN105513827B (en) | A kind of (LMO NCM AC)/(LTO AC) hybrid battery capacitance electrode material and electrode slice | |
| CN102769148A (en) | High-power lithium ion battery electrolyte | |
| CN105336942A (en) | Fully-sealed Li-ion storage battery based on ternary cathode material and preparation method of fully-sealed Li-ion storage battery | |
| CN105449143A (en) | Lithium ion battery coating diaphragm and preparation method therefor | |
| KR102529941B1 (en) | Liquid Electrolytes For Na Secondary Batteries And Na Secondary Batteries Comprising The Same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20111005 |