CN106784551A - The system of lithium ion battery service life in a kind of extension smart home - Google Patents
The system of lithium ion battery service life in a kind of extension smart home Download PDFInfo
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- CN106784551A CN106784551A CN201611213908.6A CN201611213908A CN106784551A CN 106784551 A CN106784551 A CN 106784551A CN 201611213908 A CN201611213908 A CN 201611213908A CN 106784551 A CN106784551 A CN 106784551A
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- electrolyte
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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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M10/4257—Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
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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
- H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
- H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
- H01M10/0566—Liquid materials
- H01M10/0567—Liquid materials characterised by the additives
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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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4285—Testing apparatus
-
- 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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/443—Methods for charging or discharging in response to temperature
-
- 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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
-
- 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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
-
- 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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- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
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- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Inorganic Chemistry (AREA)
- Secondary Cells (AREA)
Abstract
The present invention provides a kind of system for extending lithium ion battery service life in smart home, first cavity stores cyclic carbonate and film for additive, firm SEI films are formed in electrode surface, using the relatively low linear carbonate of the second cavity storage viscosity of isolation and the lithium salts of higher concentration, when barrier film melts under the first predetermined temperature, the electrolyte of the second cavity injects the first cavity, reduce the concentration of electrolyte in the first cavity, supplement electric conducting lithium salt, improve conductance, when the second electrolyte injects, electrode surface forms the SEI films of stabilization, isolation linear carbonate is contacted with electrode active material, avoid the decomposition of chain ester；It is electro-active that heavy current pulse charge and discharge is carried out under the high temperature conditions, so that the lithium salts for being partially depositing in electrode surface dissolves and enters electrolyte again, further reduce internal resistance, the flame-retardant additive that second electrolyte includes can improve battery stability under the high temperature conditions, ensure battery security in activation, improve battery.
Description
Technical field
The longevity is used the present invention relates to lithium ion battery in Smart Home technical field, more particularly to a kind of extension smart home
The system of life.
Background technology
Smart home (English：Smart home, home automation) have become the necessary of current people's life
Product, are increasingly widely applied in human lives, and the battery of smart home generally required and be arranged on for a long time in smart home,
And current battery and system can not meet demand of the smart home to battery life.
In view of this, nowadays it is in the urgent need to design lithium ion battery service life in a kind of new extension smart home
System, can extend the service life of battery.
The content of the invention
In order to solve above-mentioned problems of the prior art, the invention provides lithium ion in one kind extension smart home
The system of battery, inventor has found, because linear carbonate is easily decomposed in electrode surface, the influence life-span, therefore
In order to extend the service life of battery, battery electrolyte can alleviate electrolyte using cyclic carbonate as electrolyte solvent
The purpose of decomposition, but with the growth of service time of battery, cyclic ester in electrolyte can with the binding agent in electrode and
Macromolecular material polymerization in barrier film, causes electrolyte to reduce, and causes viscosity to increase, internal resistance of cell increase, so that electrode polarization
Seriously, so as to influence the life-span.And the electric conducting lithium salt in electrolyte is deposited in positive and negative polar decomghtion, in electrolyte for conductive
Lithium salts is reduced, and is also one of the reason for influenceing the life-span, therefore, a kind of lithium ion battery is applicant provided, wherein the first cavity
Storage cyclic carbonate and film for additive, so as to form firm SEI films in electrode surface, while using the second chamber of isolation
The body storage relatively low linear carbonate of viscosity, and higher concentration lithium salts, when barrier film melts under the first predetermined temperature, the
The electrolyte of two cavitys injects the first cavity, so as to reduce the concentration of electrolyte in the first cavity, and supplements electric conducting lithium salt, carries
High conductivity, and because when the second electrolyte injects, electrode surface has formd the SEI films of stabilization, has completely cut off chain
Carbonic ester is contacted with electrode active material, it is to avoid the decomposition of chain ester；Then heavy current pulse is carried out under the high temperature conditions to fill
Discharge activation so that the lithium salts for being partially depositing in electrode surface dissolves and enters electrolyte again, internal resistance is further reduced, while
The flame-retardant additive that two electrolyte include can improve battery stability under the high temperature conditions, it is ensured that the electricity in activation
Pond security, so as to improve the service life of battery.
Specific scheme is as follows：
A kind of system of lithium ion battery service life in extension smart home, the system includes lithium ion battery, temperature inspection
Device, temperature control modules, charge-discharge modules, battery detecting module and control module are surveyed, the lithium ion battery includes housing, shell
Body includes two mutually isolated cavitys 1 and cavity 2, wherein lithium-ion electric core is provided with the cavity 1, and the first electrolysis
Liquid, the solvent of first electrolyte is cyclic carbonate and/or its derivative, and first electrolyte includes the first addition
Agent, first additive is film for additive；The second electrolyte is provided with cavity 2, the solvent of second electrolyte is
Linear carbonate and/or its derivative, second electrolyte include Second addition, and Second addition is flame-retardant additive；
Electric conducting lithium salt concentration in first electrolyte is less than the electric conducting lithium salt concentration in second electrolyte；The He of the cavity 1
Isolated by being arranged on the dividing plate of enclosure interior between cavity 2, the dividing plate is by hot melt material that heat fusion joint is the first predetermined temperature
Material composition, its described first electrolyte of isolation and the second electrolyte；Characterized in that, when the temperature detector detect lithium from
When the temperature of sub- battery is higher than the second predetermined temperature, second predetermined temperature is less than the first predetermined temperature, the control module
Stop power supply of the battery to smart home, and start charge-discharge modules, lithium ion battery is carried out with the first scheduled current
Pulse discharge and recharge, first scheduled current is more than 1C, and temperature control modules make battery temperature continue to rise, and is kept
More than the first predetermined temperature；Start battery detecting module, the internal resistance of cell is detected, when the internal resistance of cell no longer declines in the scheduled time
When, stopping the pulse discharge and recharge, battery temperature is adjusted to environment temperature by the temperature control modules, and control module recovers electricity
Power supply of the pond to smart home.
Further, the cyclic carbonate includes ethyl carbonate, propyl carbonate, butyl carbonate.
Further, the film for additive includes vinylene carbonate, polypropylene carbonate alkene ester, glycol sulfite.
Further, the linear carbonate includes dimethyl carbonate, methyl ethyl carbonate, diethyl carbonate.
Further, the fire retardant includes di(2-ethylhexyl)phosphate benzene toluene ester, methyl-phosphoric acid dimethyl ester and its derivative.
Further, wherein second predetermined temperature is 45-55 degrees Celsius, first predetermined temperature is taken the photograph for 55-70
Family name's degree.
The present invention has the advantages that：
（1）Electrolyte in first cavity of battery including cyclic carbonate and film for additive, kept away using the initial stage in battery
Exempt from the decomposition of solvent, advantageously form the SEI films of stabilization；
（2）After the internal resistance of cell rises, temperature is raised when battery operated, the second electrolyte is injected the first cavity, reduces battery
Internal resistance, simultaneously because SEI films have been formed, it is to avoid the decomposition of linear carbonate.
（3）By activation at high temperature, electrode is activated, pulse current promotes the lithium salts that electrode surface is deposited molten
Solution, reduces the internal resistance of battery.
（4）The addition of fire retardant, improves the high-temperature stability of battery, it is ensured that the safety of activation is carried out.
（5）High-density polyethylene framework fills the dividing plate of low density polyethylene (LDPE), can be kept below the first predetermined temperature
Enough mechanical strengths, while after low density polyethylene (LDPE) melts, ensure that the permeability of electrolyte.
Specific embodiment
The present invention will be described in more detail by specific embodiment below, but protection scope of the present invention is not received
It is limited to these embodiments.
Configuration intelligent domestic system, the system includes lithium ion battery, temperature detector, temperature control modules, charge and discharge
Electric module, battery detecting module and control module, the lithium ion battery include housing, and housing includes two mutually isolated chambers
Body 1 and cavity 2, wherein being provided with lithium-ion electric core in the cavity 1, the positive electrode of the battery core is LiMn2O4, and negative pole is
Native graphite, and the first electrolyte, the solvent of first electrolyte is cyclic carbonate and/or its derivative, described the
One electrolyte includes the first additive, and first additive is film for additive；The second electrolyte, institute are provided with cavity 2
The solvent of the second electrolyte is stated for linear carbonate and/or its derivative, second electrolyte includes Second addition, second
Additive is flame-retardant additive；Electric conducting lithium salt concentration in first electrolyte is less than the conductive lithium in second electrolyte
Salinity；Isolated by being arranged on the dividing plate of enclosure interior between the cavity 1 and cavity 2, the dividing plate is the by heat fusion joint
The hot melt material composition of one predetermined temperature, its described first electrolyte of isolation and the second electrolyte；Characterized in that, working as the temperature
When the temperature that degree detector detects lithium ion battery is higher than the second predetermined temperature, second predetermined temperature makes a reservation for less than first
Temperature, the control module stops power supply of the battery to smart home, and starts charge-discharge modules, with the first scheduled current
Enter horizontal pulse discharge and recharge to lithium ion battery, first scheduled current is more than 1C, and temperature control modules make battery temperature
Degree continues to rise, and is maintained at more than first predetermined temperature；Start battery detecting module, detect the internal resistance of cell, work as the scheduled time
When the interior internal resistance of cell no longer declines, stop the pulse discharge and recharge, battery temperature is adjusted to environment by the temperature control modules
Temperature, control module recovers power supply of the battery to smart home.
Embodiment 1
The cyclic carbonate is ethyl carbonate, and the film for additive is vinylene carbonate, and the linear carbonate is carbon
Dimethyl phthalate, the fire retardant is di(2-ethylhexyl)phosphate benzene toluene ester, and second predetermined temperature is 45 degrees Celsius, the first pre- constant temperature
It is 60 degrees Celsius to spend, and the pulse current is 1.5C, and the discharge and recharge time is respectively 0.1s, is spaced 1s.
Embodiment 2
The cyclic carbonate is propyl carbonate, and the film for additive is glycol sulfite, and the linear carbonate is carbon
Sour methyl ethyl ester, the fire retardant is methyl-phosphoric acid dimethyl ester, and second predetermined temperature is 55 degrees Celsius, the first pre- constant temperature
It is 70 degrees Celsius to spend, and the electric current of the pulse is 5C, and the discharge and recharge time is respectively 0.1s, is spaced 1s.
More than 500 times, the life-span improves more than 30% to the cycle life of the lithium ion battery of embodiment 1 and 2.
Although present disclosure is discussed in detail by above preferred embodiment, but it would be recognized that above-mentioned
Description be not considered as limitation of the present invention.After those skilled in the art have read the above, for the present invention
Various modifications and substitutions all will be apparent.Therefore, protection scope of the present invention should be limited by appended claim
It is fixed.
Claims (7)
1. it is a kind of extend smart home in lithium ion battery service life system, the system include lithium ion battery, temperature
Detector, temperature control modules, charge-discharge modules, battery detecting module and control module, the lithium ion battery include housing,
Housing includes two mutually isolated cavitys 1 and cavity 2, wherein lithium-ion electric core is provided with the cavity 1, and the first electricity
Solution liquid, the solvent of first electrolyte is cyclic carbonate and/or its derivative, and first electrolyte includes the first addition
Agent, first additive is film for additive；The second electrolyte is provided with cavity 2, the solvent of second electrolyte is
Linear carbonate and/or its derivative, second electrolyte include Second addition, and Second addition is flame-retardant additive；
Electric conducting lithium salt concentration in first electrolyte is less than the electric conducting lithium salt concentration in second electrolyte；The He of the cavity 1
Isolated by being arranged on the dividing plate of enclosure interior between cavity 2, the dividing plate is by hot melt material that heat fusion joint is the first predetermined temperature
Material composition, its described first electrolyte of isolation and the second electrolyte；Characterized in that, when the temperature detector detect lithium from
When the temperature of sub- battery is higher than the second predetermined temperature, second predetermined temperature is less than the first predetermined temperature, the control module
Stop power supply of the battery to smart home, and start charge-discharge modules, lithium ion battery is carried out with the first scheduled current
Pulse discharge and recharge, first scheduled current is more than 1C, and temperature control modules make battery temperature continue to rise, and is kept
More than the first predetermined temperature；Start battery detecting module, the internal resistance of cell is detected, when the internal resistance of cell no longer declines in the scheduled time
When, stopping the pulse discharge and recharge, battery temperature is adjusted to environment temperature by the temperature control modules, and control module recovers electricity
Power supply of the pond to smart home.
2. the system as claimed in claim 1, the cyclic carbonate includes ethyl carbonate, propyl carbonate, butyl carbonate.
3. the system as claimed in claim 1, the film for additive includes vinylene carbonate, polypropylene carbonate alkene ester, sulfurous
Sour ethyl.
4. the system as claimed in claim 1, the linear carbonate includes dimethyl carbonate, methyl ethyl carbonate, carbonic acid diethyl
Ester.
5. the system as claimed in claim 1, the fire retardant includes di(2-ethylhexyl)phosphate benzene toluene ester, methyl-phosphoric acid dimethyl ester and its spreads out
It is biological.
6. the system as claimed in claim 1, wherein second predetermined temperature is 45-55 degrees Celsius, the first pre- constant temperature
Spend is 55-70 degrees Celsius.
7. the system as claimed in claim 1, wherein the dividing plate includes high density polyethylene (HDPE) and low density polyethylene (LDPE), wherein high
Density polyethylene is perforated membrane framework, and low density polyethylene (LDPE) is filled in the hole of the high density polyethylene (HDPE), wherein described low
The fusing point of density polyethylene is the first predetermined temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611213908.6A CN106784551A (en) | 2016-12-26 | 2016-12-26 | The system of lithium ion battery service life in a kind of extension smart home |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611213908.6A CN106784551A (en) | 2016-12-26 | 2016-12-26 | The system of lithium ion battery service life in a kind of extension smart home |
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| CN201611213908.6A Pending CN106784551A (en) | 2016-12-26 | 2016-12-26 | The system of lithium ion battery service life in a kind of extension smart home |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109473717A (en) * | 2017-09-08 | 2019-03-15 | 张家港市国泰华荣化工新材料有限公司 | A kind of electrolyte and the high nickel-based battery of high voltage suitable for the high nickel power battery of high voltage |
| CN109616603A (en) * | 2018-12-05 | 2019-04-12 | 清华大学深圳研究生院 | Diaphragm, diaphragm preparation method and application diaphragm device |
| CN109755680A (en) * | 2018-12-19 | 2019-05-14 | 龙能科技(宁夏)有限责任公司 | The chemical synthesizing method of soft package power lithium ion battery |
-
2016
- 2016-12-26 CN CN201611213908.6A patent/CN106784551A/en active Pending
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109473717A (en) * | 2017-09-08 | 2019-03-15 | 张家港市国泰华荣化工新材料有限公司 | A kind of electrolyte and the high nickel-based battery of high voltage suitable for the high nickel power battery of high voltage |
| CN109473717B (en) * | 2017-09-08 | 2021-09-14 | 张家港市国泰华荣化工新材料有限公司 | Electrolyte suitable for high-voltage high-nickel power battery and high-voltage high-nickel power battery |
| CN109616603A (en) * | 2018-12-05 | 2019-04-12 | 清华大学深圳研究生院 | Diaphragm, diaphragm preparation method and application diaphragm device |
| CN109755680A (en) * | 2018-12-19 | 2019-05-14 | 龙能科技(宁夏)有限责任公司 | The chemical synthesizing method of soft package power lithium ion battery |
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