CN105789525A - Optical fiber sensor embedded type battery diaphragm and usage thereof - Google Patents
Optical fiber sensor embedded type battery diaphragm and usage thereof Download PDFInfo
- Publication number
- CN105789525A CN105789525A CN201610328230.XA CN201610328230A CN105789525A CN 105789525 A CN105789525 A CN 105789525A CN 201610328230 A CN201610328230 A CN 201610328230A CN 105789525 A CN105789525 A CN 105789525A
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- battery
- optical fiber
- optical sensor
- barrier film
- fibre
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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
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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
- H01M10/4235—Safety or regulating additives or arrangements in electrodes, separators or electrolyte
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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
Abstract
The invention provides an optical fiber sensor embedded type battery diaphragm which comprises a battery diaphragm and a sensing sensitizing optical fiber structure embedded into the battery diaphragm, wherein the sensing sensitizing optical fiber structure comprises a plurality of optical fiber sensors. According to the optical fiber sensor embedded type battery diaphragm provided by the invention, the optical fiber sensor is embedded into the battery diaphragm and the temperature in the battery and the expansion of the shell can be monitored, so that the understanding and management for the state of the battery can be enhanced.
Description
Technical field
The present invention relates to the optical fiber sensing technology application in cell safety field, particularly relate to optical fiber sensing technology application in battery diaphragm.
Background technology
Electric automobile, with its unique advantage such as environmental protection, energy-saving and emission-reduction, becomes the important channel solving environmental pollution and energy crisis two large problems.Battery is as the power resources of electric automobile, and use safety and the development prospect of electric automobile are significant by its performance, therefore, it is achieved the monitoring in real time of cell operating status is most important.Traditional cell safety monitoring is concentrated mainly in the change of battery bulk temperature and deformation, and the short circuit of inside battery, overcharge and will cause the expansion of the overheated of inside battery and housing with material degeneration, the monitoring of battery core internal temperature and case swells is become a difficult problem urgently to be resolved hurrily.
In the structure of lithium battery, barrier film is one of crucial interior layer assembly, and barrier film is between positive pole and negative pole, and Main Function is to be separated by both positive and negative polarity active substance, it is prevented that the two poles of the earth are short circuit because of contact, additionally has the function that electrolyte ion can be made to pass through.The performance of barrier film determines the interfacial structure of battery, internal resistance etc., directly affects the characteristics such as the capacity of battery, circulation and security performance, and the combination property improving battery is had important effect by the barrier film of excellent performance.In view of the position at barrier film place, it is directly subjected to the effect of internal temperature of battery change and case swells.Therefore, battery diaphragm carry out sensing enhanced sensitivity can be sensitive diaphragm imparting inside battery safety monitoring new function.
Optical fiber has that volume is little, light weight, passive, the feature of pressure, corrosion-resistant and electromagnetism interference.Along with the development of optical fiber sensing technology, Fibre Optical Sensor is in the application scenarios that some are special, such as Oil/Gas Pipe, nuclear power station, Oil Tank etc., possesses obvious advantage.Fibre Optical Sensor is applied to the reliable fashion being designed to realize barrier film security performance monitoring function of battery diaphragm.
Summary of the invention
It is an object of the invention to provide a kind of Fibre Optical Sensor embedded battery barrier film, it is intended to for solving the problem that internal temperature of battery and case swells cannot be monitored by existing cell safety monitoring technology.
The present invention is achieved in that
The present invention provides a kind of Fibre Optical Sensor embedded battery barrier film, it is characterised in that including: battery diaphragm and the sensing enhanced sensitivity optical fiber structure embedded in described battery diaphragm, described sensing enhanced sensitivity optical fiber structure includes multiple Fibre Optical Sensor.
Further, described battery diaphragm has two-layer, and described sensing enhanced sensitivity optical fiber structure is embedded between described two-layer battery diaphragm.
Further, solidified by polythene material between described sensing enhanced sensitivity optical fiber structure and described two-layer battery diaphragm.
Further, described Fibre Optical Sensor is the online sensor of all-fiber.
Further, described Fibre Optical Sensor is Bragg optical-fiber grating sensor.
Further, described sensing enhanced sensitivity optical fiber structure is simple optical fiber, and described simple optical fiber is inscribed the Bragg optical-fiber grating sensor that multiple wavelength is different.
Further, when being applied in the set of cells comprising multiple battery, fibre delay line is set between each battery.
Further, within the length of described fibre delay line is limited in 20m.
Further, described sensing enhanced sensitivity optical fiber structure comprises multiple row optical fiber, and each column optical fiber is inscribed multiple Fibre Optical Sensor respectively.
Further, can be used for inside battery is carried out safety monitoring, the parameter of monitoring is the temperature of inside battery or stress or pH value or electrolyte ion concentration.
The method have the advantages that
1, Fibre Optical Sensor is embedded in battery diaphragm by the Fibre Optical Sensor embedded battery barrier film of the present invention, it is possible to the temperature of inside battery and the expansion of housing are monitored, thus enhancing the understanding to battery status and management.
2, Fibre Optical Sensor has the characteristics such as light weight, volume be little, corrosion-resistant and high temperature resistant, this also makes described Fibre Optical Sensor embedded battery barrier film not have notable difference compared to conventional batteries barrier film in quality and volume, also ensure that its universality in tradition lithium battery applications and safety.
3, the characteristic that optical fiber sensing technology is passive ensure that the independence of inside battery safety monitoring, and the cell safety based on described Fibre Optical Sensor embedded battery barrier film is monitored and will not the duty of battery self be impacted.
4, the Fibre Optical Sensor arrangement being embedded on battery diaphragm is flexible, it is possible to configure according to practical application request and in conjunction with suitable multiplex technique and demodulation modes.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of Fibre Optical Sensor embedded battery barrier film of the present invention；
Fig. 2 is the exploded view of Fibre Optical Sensor embedded battery barrier film of the present invention.
In figure: the upper barrier film of 1-, 2-lower diaphragm plate, 3-senses enhanced sensitivity optical fiber structure, 4-Fibre Optical Sensor.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, all other embodiments that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of protection of the invention.
Such as Fig. 1 and Fig. 2, the embodiment of the present invention provides a kind of Fibre Optical Sensor embedded battery barrier film, it is applied to lithium battery interior so that inside battery is carried out safety monitoring, including: traditional battery diaphragm and the sensing enhanced sensitivity optical fiber structure 3 embedded in described battery diaphragm, described sensing enhanced sensitivity optical fiber structure 3 includes multiple Fibre Optical Sensor 4.
Such as Fig. 2, described in the present embodiment, battery diaphragm has two-layer, and including upper barrier film 1 and lower diaphragm plate 2, the material of described upper barrier film 1 and described lower diaphragm plate 2 may select polyethylene or microporous polypropylene membrane, in other embodiments, described battery diaphragm can also be more than monolayer or two-layer.Described sensing enhanced sensitivity optical fiber structure 3 adopts standard single-mode fiber, overall diameter is 256 microns, cladding diameter is 125 microns, core diameter is 8 microns, described sensing enhanced sensitivity optical fiber structure 3 includes multiple Fibre Optical Sensor 4, and it is embedded between described upper barrier film 1 and described lower diaphragm plate 2, solidified by materials such as polyethylene.The embedding of described sensing enhanced sensitivity optical fiber structure 3 will increase the thickness of conventional batteries barrier film to a certain extent, but the size of battery is not caused large effect.Meanwhile, corrosion-resistant, the heat-resisting ability of optical fiber also ensure that its compatibility in electrolyte solution and job stability.
For simplifying described sensing enhanced sensitivity optical fiber structure 3, described sensing enhanced sensitivity optical fiber structure 3 is made to have the ability of light conduction and external environment perception concurrently, described Fibre Optical Sensor 4 may select the online sensor of all-fiber, as based on the fibre-optical microstructure sensor of multiple-mode interfence mechanism, long-period fiber grating sensor and Bragg optical-fiber grating sensor etc., by rational demodulation configurations, it may be achieved the real-time perception to many reference amounts changes such as internal temperature of battery, stress, pH value, electrolyte ion concentration.
Fibre Optical Sensor 4 in the present embodiment is preferably Bragg optical-fiber grating sensor.Bragg grating is that a kind of use frequency is the highest, and the Fibre Optical Sensor that range of application is the widest, it can change its reflecting light wavelength according to the variations in temperature of external environment or strains experienced.We can realize the perception to internal temperature of battery and STRESS VARIATION by measuring its reflection wavelength this absolute magnitude of drifting about.
Such as Fig. 1, the safety monitoring demand in practical application is depended in the configuration of described sensing enhanced sensitivity optical fiber structure 3.The present embodiment senses enhanced sensitivity optical fiber structure 3 and adopts simple optical fiber, it is embedded between described upper barrier film 1 and described lower diaphragm plate 2 according to array, it is specially described sensing enhanced sensitivity optical fiber structure 3 and comprises four row optical fiber, each column optical fiber is inscribed three Fibre Optical Sensors 4 respectively, therefore, 12 Fibre Optical Sensors 4 it are embedded with between described upper barrier film 1 and described lower diaphragm plate 2 altogether.For distinguishing each Fibre Optical Sensor 4 in same battery, we introduce wavelength-division multiplex technique, and 12 Fibre Optical Sensors 4 namely inscribed have different center reflection wavelength；Accordingly, when variations in temperature in battery, the reflection wavelength of described Fibre Optical Sensor 4 will drift about, and wavelength signals is processed by the demodulating equipment eventually through central office, obtains the thermo parameters method of inside battery.In other embodiments, the quantity of described Fibre Optical Sensor 4 can adjust, and is determined by monitoring intensive demand, it is achieved to the safety monitoring carrying out multiple spot inside a certain battery core.Meanwhile, for avoiding the crosstalk between each Fibre Optical Sensor 4, it is necessary to reasonably reserve wavelength interval, this is relevant with monitoring system expection measurement dynamic range.
When described Fibre Optical Sensor embedded battery diaphragm application is in the set of cells comprising multiple battery, for simplifying the inside battery Safety monitoring system based on Fibre Optical Sensor embedded battery barrier film, battery diaphragm in different batteries is adopted identical configuration by us, and the sensing enhanced sensitivity optical fiber structure 3 namely embedded has universality.Needing each battery diaphragm in different batteries is made a distinction, we realize time-division multiplex technology by introducing fibre delay line between each battery, within the length of described fibre delay line is limited in 20m simultaneously.The real-time monitoring of the inside battery safety based on Fibre Optical Sensor embedded battery barrier film is realized in combination with rational demodulation techniques.Demodulating through central office, it is possible to obtain the distribution of the temperature field in battery or stress field, when temperature is too high or stress is excessive, when drifting beyond warning value of reflection wavelength, central office will directly communicate with set of cells control centre, implement protective measure.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all within the spirit and principles in the present invention, any amendment of making, equivalent replacement, improvement etc., should be included within protection scope of the present invention.
Claims (10)
1. a Fibre Optical Sensor embedded battery barrier film, it is characterised in that including: battery diaphragm and the sensing enhanced sensitivity optical fiber structure embedded in described battery diaphragm, described sensing enhanced sensitivity optical fiber structure includes multiple Fibre Optical Sensor.
2. Fibre Optical Sensor embedded battery barrier film as claimed in claim 1, it is characterised in that: described battery diaphragm has two-layer, and described sensing enhanced sensitivity optical fiber structure is embedded between described two-layer battery diaphragm.
3. Fibre Optical Sensor embedded battery barrier film as claimed in claim 2, it is characterised in that: solidified by polythene material between described sensing enhanced sensitivity optical fiber structure and described two-layer battery diaphragm.
4. Fibre Optical Sensor embedded battery barrier film as claimed in claim 1, it is characterised in that: described Fibre Optical Sensor is the online sensor of all-fiber.
5. Fibre Optical Sensor embedded battery barrier film as claimed in claim 4, it is characterised in that: described Fibre Optical Sensor is Bragg optical-fiber grating sensor.
6. Fibre Optical Sensor embedded battery barrier film as claimed in claim 5, it is characterised in that: described sensing enhanced sensitivity optical fiber structure is simple optical fiber, and described simple optical fiber is inscribed the Bragg optical-fiber grating sensor that multiple wavelength is different.
7. Fibre Optical Sensor embedded battery barrier film as claimed in claim 1, it is characterised in that: when being applied in the set of cells comprising multiple battery, fibre delay line is set between each battery.
8. Fibre Optical Sensor embedded battery barrier film as claimed in claim 7, it is characterised in that: within the length of described fibre delay line is limited in 20m.
9. Fibre Optical Sensor embedded battery barrier film as claimed in claim 1, it is characterised in that: described sensing enhanced sensitivity optical fiber structure comprises multiple row optical fiber, and each column optical fiber is inscribed multiple Fibre Optical Sensor respectively.
10. the purposes of Fibre Optical Sensor embedded battery barrier film as claimed in any one of claims 1-9 wherein, it is characterized in that: for inside battery is carried out safety monitoring, the parameter of monitoring is the temperature of inside battery or stress or pH value or electrolyte ion concentration.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610328230.XA CN105789525B (en) | 2016-05-18 | 2016-05-18 | Fibre optical sensor embedded battery diaphragm and application thereof |
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| CN201610328230.XA CN105789525B (en) | 2016-05-18 | 2016-05-18 | Fibre optical sensor embedded battery diaphragm and application thereof |
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| CN105789525B CN105789525B (en) | 2018-06-26 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107340478A (en) * | 2017-06-13 | 2017-11-10 | 江苏银基烯碳能源科技有限公司 | A kind of temperature and strain acquisition system |
| CN108511830A (en) * | 2017-02-27 | 2018-09-07 | 湖南妙盛汽车电源有限公司 | A kind of lithium battery |
| CN108511783A (en) * | 2017-02-27 | 2018-09-07 | 湖南妙盛汽车电源有限公司 | A kind of lithium battery |
| DE102018100986A1 (en) * | 2018-01-17 | 2019-07-18 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Galvanic cell |
| CN110308403A (en) * | 2019-07-03 | 2019-10-08 | 中国民用航空飞行学院 | The detection of power lithium-ion battery multi-parameter and acquisition method |
| CN112762806A (en) * | 2020-12-23 | 2021-05-07 | 北京国电光宇机电设备有限公司 | Wisdom lithium cell of health degree self-test |
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| CN203620870U (en) * | 2013-12-06 | 2014-06-04 | 珠海市广浩捷精密机械有限公司 | Environment-friendly high-precision lithium ion battery diaphragm coater |
| CN104541387A (en) * | 2012-08-10 | 2015-04-22 | 巴特勒纪念研究院 | Optical monitoring of battery health |
| CN205657107U (en) * | 2016-05-18 | 2016-10-19 | 小牛动力（武汉）新能源技术有限公司 | Embedded battery separator of optical fiber sensor |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108511830A (en) * | 2017-02-27 | 2018-09-07 | 湖南妙盛汽车电源有限公司 | A kind of lithium battery |
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| CN107340478A (en) * | 2017-06-13 | 2017-11-10 | 江苏银基烯碳能源科技有限公司 | A kind of temperature and strain acquisition system |
| DE102018100986A1 (en) * | 2018-01-17 | 2019-07-18 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Galvanic cell |
| DE102018100986B4 (en) | 2018-01-17 | 2022-08-11 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Galvanic cell |
| CN110308403A (en) * | 2019-07-03 | 2019-10-08 | 中国民用航空飞行学院 | The detection of power lithium-ion battery multi-parameter and acquisition method |
| CN112762806A (en) * | 2020-12-23 | 2021-05-07 | 北京国电光宇机电设备有限公司 | Wisdom lithium cell of health degree self-test |
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| Publication number | Publication date |
|---|---|
| CN105789525B (en) | 2018-06-26 |
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