CN105845968A - Safe battery and manufacturing method thereof - Google Patents
Safe battery and manufacturing method thereof Download PDFInfo
- Publication number
- CN105845968A CN105845968A CN201610237123.6A CN201610237123A CN105845968A CN 105845968 A CN105845968 A CN 105845968A CN 201610237123 A CN201610237123 A CN 201610237123A CN 105845968 A CN105845968 A CN 105845968A
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- Prior art keywords
- battery
- pole piece
- positive electrode
- negative
- ptc material
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/24—Alkaline accumulators
- H01M10/28—Construction or manufacture
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/24—Alkaline accumulators
- H01M10/30—Nickel accumulators
-
- 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
-
- 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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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Secondary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention relates to a safe battery and a manufacturing method thereof. The safe battery comprises a membrane, a positive pole piece and a negative pole piece, wherein the positive pole piece comprises a positive electrode material and a positive electrode current collector; the positive electrode material coats the positive electrode current collector; the negative pole piece comprises a negative electrode material and a negative electrode current collector; the negative electrode material coats the negative electrode current collector; and at least one of the positive electrode material and the negative electrode material is mixed with a PTC material. When a short circuit is formed between the positive pole piece and the negative pole piece due to extrusion or violent collision of the battery, the resistance value is rapidly improved to the maximum after the PTC material on the positive pole piece and/or the negative pole piece reaches the curie temperature since the internal temperature of the battery rises; and the internal resistance value of the battery is the maximum, so that the internal current of the battery is greatly reduced; explosion caused by internal overheat of the battery due to the short circuit is avoided; and the safety of the battery is greatly improved.
Description
Technical field
The present invention relates to cell art, particularly relate to safety battery and manufacture method thereof.
Background technology
In recent years, along with the development of new energy technology, and the requirement to environmental protection, the energy of all trades and professions is the most progressively converted to use electric energy to solve, and battery has obtained the quick development of large-scale application, such as, battery applications is on electric automobile, and electric automobile is then developed rapidly.But electric automobile industry also exists certain obstacle and bottleneck at present, essentially consists in the safety issue of battery.
Battery is typically made up of cover plate, housing, electrolyte and battery core etc..Battery core is assembled by the way of winding or lamination by barrier film, positive plate and negative plate.Positive and negative plate is after negative or positive electrode active material mixes with conductive agent and binding agent etc. respectively, and coating on a current collector, is made through operations such as drying, roll-ins.The electrode material electrochemical reaction activity used due to battery is higher, and containing the most inflammable organic solvent in electrolyte, and battery is in use susceptible to the battery short circuit that causes because of collision and extruding etc. and on fire or blast.
In order to improve the security of battery place circuit, add PTC (Positive Temperature Coefficient in circuit, positive temperature coefficient/semistor) it is a preferably solution, PTC is the semiconductor resistor that a kind of typical case has temperature sensitivity, when exceeding certain temperature (Curie temperature), its resistance value raises increasing in step evolution along with temperature.So, when circuit is short-circuited, owing to heat is very big, and then PTC temperature is made to rise and exceed uniform temperature, PTC resistance rises to greatly, so that electric current greatly reduces in circuit, be equivalent to circuit is blocked, so that circuit can disconnect in time when short circuit, guarantee safety, but above-mentioned this scheme existing defects, it is only capable of solving the temperature anomaly that short circuit or outside batteries fault cause, and cannot the generation effect when internal short-circuit of battery.It should be understood that, when battery applications is on electric automobile, when there is traffic accident, battery stands in the breach the collision that is squeezed, and inside battery produces short circuit due to extruding, and owing to PTC is arranged in circuit or outside batteries, the both positive and negative polarity that cannot cut off inside battery connects, and then because short circuit causes internal temperature of battery to steeply rise, set off an explosion, still there is potential safety hazard.
Summary of the invention
Based on this, it is necessary the short circuit of the inside that battery causes owing to being squeezed and collide to be carried out open circuit for available circuit, the defect of the potential safety hazard thereby resulted in cannot be avoided, a kind of safety battery and manufacture method thereof are provided, can be when internal short-circuit of battery, to cutting off, and then it is prevented effectively from the security incident thereby resulted in.
A kind of safety battery, including: barrier film, anode pole piece and cathode pole piece, described anode pole piece includes positive electrode and plus plate current-collecting body, described positive electrode is coated on described plus plate current-collecting body, described cathode pole piece includes negative material and negative current collector, described negative material is coated on described negative current collector, described positive electrode and described negative material at least one be mixed with ptc material.
Further, described ptc material includes polymer, conductive agent, fire retardant and antioxidant；Described polymer is the mixture of one or more in glue, natural rubber, NBR, polyurethane, polyvinyl ester, polypropylene ester, polyether-ether-ketone, Merlon, Kynoar, PEO；Described conductive agent is the mixture of one or more in graphite, carbon black, carbon fiber, metal dust or fiber.
Further, in described positive electrode, the ptc material mass percent of mixing is 0.1%～90%.
Further, in described negative material, the ptc material mass percent of mixing is 0.1%～90%.
The manufacture method of a kind of safety battery, comprises the following steps:
Positive electrode, negative material and ptc material are worn into powdery respectively；
By positive electrode and the ptc material mixing of powdery of powdery, blend into anode sizing agent；
By negative material and the ptc material mixing of powdery of powdery, blend into cathode size；
Described anode sizing agent and described cathode size are respectively coated and are prepared as anode pole piece and cathode pole piece on a current collector；
Barrier film is placed between described anode pole piece and described cathode pole piece, is wound into battery core；
Described battery core is put in housing；
Electrolyte is injected in described housing；
Cover plate is arranged on housing encapsulation and forms battery.
Further, described ptc material includes polymer, conductive agent, fire retardant and antioxidant；Described polymer is the mixture of one or more in glue, natural rubber, NBR, polyurethane, polyvinyl ester, polypropylene ester, polyether-ether-ketone, Merlon, Kynoar, PEO；Described conductive agent is the mixture of one or more in graphite, carbon black, carbon fiber, metal dust or fiber.
Further, the fineness degree of the described ptc material of powdery is 50 mesh～500 mesh.
Above-mentioned safety battery and manufacture method thereof, when battery be squeezed or sharp impacts and cause between internal positive pole piece and cathode pole piece short-circuit time, owing to internal temperature of battery rises, the resistance after reaching Curie temperature of the ptc material on anode pole piece and/or cathode pole piece is caused to be promoted to rapidly greatly, make inside battery resistance very big, thus it being substantially reduced the electric current of inside battery, it is to avoid the inside battery caused due to short circuit is overheated and the blast that causes, substantially increases the security of battery.
Accompanying drawing explanation
Fig. 1 is the flow chart of the manufacture method of the safety battery of one embodiment of the invention.
Detailed description of the invention
For the ease of understanding the present invention, below with reference to relevant drawings, the present invention is described more fully.Accompanying drawing gives the better embodiment of the present invention.But, the present invention can realize in many different forms, however it is not limited to embodiments described herein.On the contrary, provide the purpose of these embodiments be make the disclosure is understood more thorough comprehensively.
It should be noted that be referred to as " being arranged at " another element when element, it can be directly on another element or can also there is element placed in the middle.When an element is considered as " connection " another element, and it can be directly to another element or may be simultaneously present centering elements.For illustrative purposes only, being not offered as is unique embodiment for term as used herein " vertical ", " level ", "left", "right" and similar statement.
Unless otherwise defined, all of technology used herein is identical with the implication that the those skilled in the art belonging to the present invention are generally understood that with scientific terminology.The term used the most in the description of the invention is intended merely to describe the purpose of specific embodiment, it is not intended that in limiting the present invention.Term as used herein " and/or " include the arbitrary and all of combination of one or more relevant Listed Items.
As shown in Figure 1, it is the safety battery of a preferred embodiment of the present invention, including: barrier film, anode pole piece and cathode pole piece, described anode pole piece includes positive electrode and plus plate current-collecting body, described positive electrode is coated on described plus plate current-collecting body, described cathode pole piece includes that negative material and negative current collector, described negative material are coated on described negative current collector, described positive electrode and described negative material at least one be mixed with ptc material.Such as, described positive electrode is mixed with ptc material, and such as, described negative material is mixed with ptc material, and such as, described positive electrode and described negative material are all mixed with ptc material.
Wherein, described ptc material includes polymer, conductive agent, fire retardant and antioxidant；Described polymer is the mixture of one or more in glue, natural rubber, NBR, polyurethane, polyvinyl ester, polypropylene ester, polyether-ether-ketone, Merlon, Kynoar, PEO；Described conductive agent is the mixture of one or more in graphite, carbon black, carbon fiber, metal dust or fiber；Described positive electrode is LiFePO 4 or the tertiary cathode material by band LiFePO 4；Described negative material is graphite and the one of which of Graphene or two kinds；Described plus plate current-collecting body is aluminium foil, and described negative current collector is Copper Foil.
When battery be squeezed or sharp impacts and cause between internal positive pole piece and cathode pole piece short-circuit time, owing to internal temperature of battery rises, the resistance after reaching Curie temperature of the ptc material on anode pole piece and/or cathode pole piece is caused to be promoted to rapidly greatly, make inside battery resistance very big, thus it is substantially reduced the electric current of inside battery, the blast avoiding the inside battery caused due to short circuit overheated and to cause, substantially increases the security of battery.Even if it is noted that now the resistance of ptc material is very big, but inside battery still has weak current to pass through, therefore battery remains to maintain Curie temperature and fluctuates, the electric current of inside battery is the most persistently blocked by ptc material, so, before inside battery fault is not got rid of, battery is then always maintained at blocking state, so, being prevented effectively from after temperature reduces, battery recovery turns on, and then short circuit is occurred again and causes battery explosion so that improve the security of battery further.
It should be understood that, the Curie temperature of ptc material can be modulated according to the ratio between polymer, conductive agent, fire retardant and antioxidant, so, battery then, in different use conditions or different use environment, has security feature, such as, when Curie temperature is relatively low, battery i.e. cuts off in relatively low temperature or in the moment of short circuit, and when distance temperature is higher, then battery a period of time after the high temperature of relative valency or short circuit cuts off.
Therefore, in the present invention, ptc material comprises each component of following mass fraction: 65 parts～75 parts of polymer, conductive agent 30 parts～35 parts, fire retardant 10.5 parts～11.5 parts and 2.5 parts～3.5 parts of oxidant.
So that the barrier effect of ptc material is more preferably, further, in described positive electrode, the ptc material mass percent of mixing is 0.1%～90%, and further, in described negative material, the ptc material mass percent of mixing is 0.1%～90%.
As it is shown in figure 1, the present invention also provides for the manufacture method of a kind of safety battery, comprise the following steps:
Step S100, wears into powdery respectively by positive electrode, negative material and ptc material.
Specifically, positive electrode, negative material and ptc material being worn into granularity respectively is 50 mesh～the powder of 500 mesh, it is preferable that positive electrode, negative material and ptc material are worn into powder that granularity is 200 mesh respectively.
Step S200, by positive electrode and the ptc material mixing of powdery of powdery, blends into anode sizing agent.
Step S300, by negative material and the ptc material mixing of powdery of powdery, blends into cathode size.
Step S400, is respectively coated described anode sizing agent and described cathode size and is prepared as anode pole piece and cathode pole piece on a current collector.
Step S500, is placed in barrier film between described anode pole piece and described cathode pole piece, is wound into battery core.
Step S600, puts into described battery core in housing.
Step S700, injects electrolyte in described housing.
Step S800, is arranged on cover plate on housing encapsulation and forms battery.
The specific embodiment of the present invention be presented herein below:
Embodiment 1
Soft Roll polymer battery, after mixing containing other positive electrodes that the ptc material that mass percent is 10% and mass percent are 90%, add stirring in solvent and form anode sizing agent, it is coated on plus plate current-collecting body and is prepared as anode pole piece, after mixing containing other negative materials that the ptc material that mass percent is 10% and mass percent are 90%, add stirring in solvent and form cathode size, being coated on negative current collector and be prepared as cathode pole piece, anode pole piece, cathode pole piece and membrane coil are coiled into battery core and are encapsulated in housing.At normal temperatures, being 3A by the electric current of battery, when the temperature of battery rises to 80 DEG C, the electric current passed through is decreased to 0.1A, and the resistance of Soft Roll polymer battery rises to 40 ohm.
Embodiment 2
Cylinder type lithium battery, after mixing containing other positive electrodes that the ptc material that mass percent is 5% and mass percent are 95%, add stirring in solvent and form anode sizing agent, it is coated on plus plate current-collecting body and is prepared as anode pole piece, after mixing containing other negative materials that the ptc material that mass percent is 5% and mass percent are 95%, add stirring in solvent and form cathode size, being coated on negative current collector and be prepared as cathode pole piece, anode pole piece, cathode pole piece and membrane coil are coiled into battery core and are encapsulated in housing.At normal temperatures, being 3A by the electric current of battery, when the temperature of battery rises to 85 DEG C, the electric current passed through is decreased to 0.1A, and the resistance of cylinder type lithium battery rises to 40 ohm.
Embodiment 3
Ni-MH battery, after mixing containing other positive electrodes that the ptc material that mass percent is 5% and mass percent are 95%, add stirring in solvent and form anode sizing agent, it is coated on plus plate current-collecting body and is prepared as anode pole piece, after mixing containing other negative materials that the ptc material that mass percent is 5% and mass percent are 95%, add stirring in solvent and form cathode size, being coated on negative current collector and be prepared as cathode pole piece, anode pole piece, cathode pole piece and membrane coil are coiled into battery core and are encapsulated in housing.At normal temperatures, being 2.6A by the electric current of battery, when the temperature of battery rises to 85 DEG C, the electric current passed through is decreased to 0.1A, and the resistance of Ni-MH battery rises to 20 ohm.
Each technical characteristic of embodiment described above can combine arbitrarily, for making description succinct, the all possible combination of each technical characteristic in above-described embodiment is not all described, but, as long as the combination of these technical characteristics does not exist contradiction, all it is considered to be the scope that this specification is recorded.
Embodiment described above only have expressed the several embodiments of the present invention, and it describes more concrete and detailed, but can not therefore be construed as limiting the scope of the patent.It should be pointed out that, for the person of ordinary skill of the art, without departing from the inventive concept of the premise, it is also possible to make some deformation and improvement, these broadly fall into protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (7)
1. a safety battery, it is characterised in that including: barrier film, anode pole piece and cathode pole piece, described
Anode pole piece includes that positive electrode and plus plate current-collecting body, described positive electrode are coated on described plus plate current-collecting body,
Described cathode pole piece includes that negative material and negative current collector, described negative material coat described negative pole currect collecting
On body, described positive electrode and described negative material at least one be mixed with ptc material.
Safety battery the most according to claim 1, it is characterised in that described ptc material includes polymerization
Thing, conductive agent, fire retardant and antioxidant；Described polymer is glue, natural rubber, NBR, poly-ammonia
In ester, polyvinyl ester, polypropylene ester, polyether-ether-ketone, Merlon, Kynoar, PEO
The mixture of one or more；Described conductive agent is graphite, carbon black, carbon fiber, metal dust or fiber
In the mixture of one or more.
Safety battery the most according to claim 1, it is characterised in that mixing in described positive electrode
Ptc material mass percent is 0.1%～90%.
Safety battery the most according to claim 1, it is characterised in that mixing in described negative material
Ptc material mass percent is 0.1%～90%.
5. the manufacture method of a safety battery, it is characterised in that comprise the following steps:
Positive electrode, negative material and ptc material are worn into powdery respectively；
By positive electrode and the ptc material mixing of powdery of powdery, blend into anode sizing agent；
By negative material and the ptc material mixing of powdery of powdery, blend into cathode size；
Described anode sizing agent and described cathode size are respectively coated and are prepared as anode pole piece on a current collector and bear
Pole pole piece；
Barrier film is placed between described anode pole piece and described cathode pole piece, is wound into battery core；
Described battery core is put in housing；
Electrolyte is injected in described housing；
Cover plate is arranged on housing encapsulation and forms battery.
The manufacture method of safety battery the most according to claim 5, it is characterised in that described PTC material
Material includes polymer, conductive agent, fire retardant and antioxidant；Described polymer is glue, natural rubber, fourth
Nitrile glue, polyurethane, polyvinyl ester, polypropylene ester, polyether-ether-ketone, Merlon, Kynoar, poly-
The mixture of one or more in oxirane；Described conductive agent is graphite, carbon black, carbon fiber, metal
The mixture of one or more in powder or fiber.
The manufacture method of safety battery the most according to claim 5, it is characterised in that powdery described
The fineness degree of ptc material is 50 mesh～500 mesh.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610237123.6A CN105845968A (en) | 2016-04-15 | 2016-04-15 | Safe battery and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610237123.6A CN105845968A (en) | 2016-04-15 | 2016-04-15 | Safe battery and manufacturing method thereof |
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| Publication Number | Publication Date |
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| CN105845968A true CN105845968A (en) | 2016-08-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610237123.6A Pending CN105845968A (en) | 2016-04-15 | 2016-04-15 | Safe battery and manufacturing method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112993207A (en) * | 2021-02-08 | 2021-06-18 | 深圳得能能源科技有限公司 | Safety battery |
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|---|---|---|---|---|
| CN1606183A (en) * | 2003-10-10 | 2005-04-13 | Lg电线有限公司 | Lithium secondary battery having ptc powder and manufacturing method thereof |
| CN1905250A (en) * | 2006-08-10 | 2007-01-31 | 武汉大学 | Granular electrode composite material with positive temp coefficient and preparing process thereof |
| CN102208678A (en) * | 2011-04-19 | 2011-10-05 | 中南大学 | Safe lithium ion battery |
| CN103022458A (en) * | 2012-12-25 | 2013-04-03 | 天津市捷威动力工业有限公司 | Lithium ion cathode material with high security and lithium ion battery employing same |
| CN103194161A (en) * | 2012-01-10 | 2013-07-10 | 万向电动汽车有限公司 | Positive temperature coefficient (PTC) material used for heat safety protection of lithium ion battery, and application thereof |
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2016
- 2016-04-15 CN CN201610237123.6A patent/CN105845968A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1606183A (en) * | 2003-10-10 | 2005-04-13 | Lg电线有限公司 | Lithium secondary battery having ptc powder and manufacturing method thereof |
| CN1905250A (en) * | 2006-08-10 | 2007-01-31 | 武汉大学 | Granular electrode composite material with positive temp coefficient and preparing process thereof |
| CN102208678A (en) * | 2011-04-19 | 2011-10-05 | 中南大学 | Safe lithium ion battery |
| CN103194161A (en) * | 2012-01-10 | 2013-07-10 | 万向电动汽车有限公司 | Positive temperature coefficient (PTC) material used for heat safety protection of lithium ion battery, and application thereof |
| CN103022458A (en) * | 2012-12-25 | 2013-04-03 | 天津市捷威动力工业有限公司 | Lithium ion cathode material with high security and lithium ion battery employing same |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112993207A (en) * | 2021-02-08 | 2021-06-18 | 深圳得能能源科技有限公司 | Safety battery |
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Application publication date: 20160810 |