CN105789525B - Fibre optical sensor embedded battery diaphragm and application thereof - Google Patents
Fibre optical sensor embedded battery diaphragm and application thereof Download PDFInfo
- Publication number
- CN105789525B CN105789525B CN201610328230.XA CN201610328230A CN105789525B CN 105789525 B CN105789525 B CN 105789525B CN 201610328230 A CN201610328230 A CN 201610328230A CN 105789525 B CN105789525 B CN 105789525B
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- battery diaphragm
- optical fiber
- optical sensor
- fibre optical
- battery
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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
-
- 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
-
- 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 & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Secondary Cells (AREA)
Abstract
The present invention provides a kind of fibre optical sensor embedded battery diaphragm, including：Sensing enhanced sensitivity optical fiber structure in battery diaphragm and the embedded battery diaphragm, the sensing enhanced sensitivity optical fiber structure include multiple fibre optical sensors.Fibre optical sensor is embedded into battery diaphragm by the fibre optical sensor embedded battery diaphragm of the present invention, the temperature of inside battery and the expansion of housing can be monitored, so as to enhance the understanding and management to battery status.
Description
Technical field
The present invention relates to optical fiber sensing technology in the application in cell safety field more particularly to optical fiber sensing technology in battery
Application in diaphragm.
Background technology
Electric vehicle is become with unique advantages such as its environmentally protective, energy-saving and emission-reduction and is solved environmental pollution and energy crisis two
The important channel of big problem.Power resources of the battery as electric vehicle, performance is to the safe to use of electric vehicle and hair
Exhibition prospect is of great significance, and therefore, realizes that the monitoring in real time to cell operating status is most important.Traditional cell safety prison
Survey is concentrated mainly in the variation of battery bulk temperature and deformation, and the short circuit of inside battery, is overcharged and will be caused with material degeneration
The overheat of inside battery and the expansion of housing become difficulty urgently to be resolved hurrily to the monitoring of battery core internal temperature and case swells
Topic.
In the structure of lithium battery, diaphragm is one of crucial interior layer assembly, and diaphragm is between anode and cathode, mainly
Effect is to separate positive and negative anodes active material, prevents the two poles of the earth short-circuit due to contact, and electrolyte ion can be led to by additionally having
The function of crossing.The performance of diaphragm determines the interfacial structure of battery, internal resistance etc., directly affects capacity, cycle and the peace of battery
The characteristics such as full performance, the diaphragm haveing excellent performance play an important role the comprehensive performance for improving battery.In view of where diaphragm
Position is directly acted on by internal temperature of battery variation and case swells.Therefore, battery diaphragm carry out sensing enhanced sensitivity can
The new function of inside battery safety monitoring is assigned for sensitive diaphragm.
Optical fiber has the characteristics of small, light weight, passive, pressure-resistant, corrosion-resistant and electromagnetism interference.With Fibre Optical Sensor
The development of technology, fibre optical sensor is in some special application scenarios, such as Oil/Gas Pipe, nuclear power station, Oil Tank, has apparent
Advantage.Fibre optical sensor is applied to one that is designed to realize diaphragm security performance monitoring function of battery diaphragm reliably
Mode.
Invention content
The purpose of the present invention is to provide a kind of fibre optical sensor embedded battery diaphragms, it is intended to for solving existing electricity
The problem of pond safety monitoring technology can not be monitored internal temperature of battery and case swells.
The invention is realized in this way：
The present invention provides a kind of fibre optical sensor embedded battery diaphragm, which is characterized in that including：Battery diaphragm and insertion
Sensing enhanced sensitivity optical fiber structure in the battery diaphragm, the sensing enhanced sensitivity optical fiber structure include multiple fibre optical sensors.
Further, the battery diaphragm has two layers, and the sensing enhanced sensitivity optical fiber structure is embedded in two layers of battery
Between diaphragm.
Further, consolidated between the sensing enhanced sensitivity optical fiber structure and two layers of battery diaphragm by polythene material
Change.
Further, the fibre optical sensor is the online sensor of all -fiber.
Further, the fibre optical sensor is Bragg optical-fiber grating sensor.
Further, the sensing enhanced sensitivity optical fiber structure is simple optical fiber, and multiple wavelength are inscribed not on the simple optical fiber
Same Bragg optical-fiber grating sensor.
Further, when in applied to the battery pack comprising multiple batteries, optical fiber delay is set between each battery
Line.
Further, the length of the fibre delay line is limited within 20m.
Further, the sensing enhanced sensitivity optical fiber structure includes multiple row optical fiber, and multiple optical fiber are inscribed respectively on each column optical fiber
Sensor.
Further, available for carrying out safety monitoring to inside battery, the parameter of monitoring for inside battery temperature or
Stress either pH value or electrolyte ion concentration.
The invention has the advantages that：
1st, fibre optical sensor is embedded into battery diaphragm by fibre optical sensor embedded battery diaphragm of the invention, can be right
The temperature of inside battery and the expansion of housing are monitored, so as to enhance the understanding and management to battery status.
2nd, fibre optical sensor has the characteristics such as light weight, small, corrosion-resistant and high temperature resistant, this is but also the optical fiber passes
Sensor embedded battery diaphragm does not have notable difference compared to conventional batteries diaphragm in quality and volume, also ensures that it is being passed
Universality and safety in lithium battery applications of uniting.
3rd, the passive characteristic of optical fiber sensing technology ensure that the independence of inside battery safety monitoring, be passed based on the optical fiber
The cell safety monitoring of sensor embedded battery diaphragm will not impact the working condition of battery itself.
4th, the fibre optical sensor arrangement being embedded on battery diaphragm is flexible, according to practical application request and can combine
Appropriate multiplexing technology and demodulation modes is configured.
Description of the drawings
Fig. 1 is the schematic diagram of fibre optical sensor embedded battery diaphragm of the present invention；
Fig. 2 is the exploded view of fibre optical sensor embedded battery diaphragm of the present invention.
In figure：1- upper diaphragms, 2- lower diaphragm plates, 3- sensing enhanced sensitivity optical fiber structures, 4- fibre optical sensors.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained all other without making creative work
Embodiment shall fall within the protection scope of the present invention.
Such as Fig. 1 and Fig. 2, the embodiment of the present invention provides a kind of fibre optical sensor embedded battery diaphragm, is applied to lithium electricity
To carry out safety monitoring to inside battery inside pond, including：Sensing in traditional battery diaphragm and the embedded battery diaphragm
Enhanced sensitivity optical fiber structure 3, the sensing enhanced sensitivity optical fiber structure 3 include multiple fibre optical sensors 4.
Such as Fig. 2, battery diaphragm described in the present embodiment has two layers, including upper diaphragm 1 and lower diaphragm plate 2, the upper diaphragm 1
Polyethylene or microporous polypropylene membrane may be selected with the material of the lower diaphragm plate 2, in other embodiments, the battery diaphragm also may be used
To be individual layer or more than two layers.The sensing enhanced sensitivity optical fiber structure 3 is using standard single-mode fiber, and overall diameter is 256 microns, packet
A diameter of 125 microns of layer, core diameter are 8 microns, and the sensing enhanced sensitivity optical fiber structure 3 includes multiple fibre optical sensors 4, and embedding
Enter between the upper diaphragm 1 and the lower diaphragm plate 2, pass through the material solidifications such as polyethylene.The sensing enhanced sensitivity optical fiber structure 3
It is embedded to increase the thickness of conventional batteries diaphragm to a certain extent, but large effect is not caused to the size of battery.Meanwhile
Corrosion-resistant, the heat-resisting ability of optical fiber also ensure its compatibility and job stability in electrolyte solution.
For the simplification sensing enhanced sensitivity optical fiber structure 3 so that the sensing enhanced sensitivity optical fiber structure 3 has both light conduction and the external world
The online sensor of all -fiber, such as light based on multiple-mode interfence mechanism may be selected in the ability of environment sensing, the fibre optical sensor 4
Fine Microstructure Sensor, long-period fiber grating sensor and Bragg optical-fiber grating sensor etc., by reasonably demodulating
Configuration is, it can be achieved that the real-time perception changed to many reference amounts 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 one
Kind of frequency of use highest, the most wide fibre optical sensor of application range, can according to the temperature change of external environment or be subject to should
Become and change its reflecting light wavelength.We can drift about this absolute magnitude by measuring its reflection wavelength and realize to inside battery
The perception of temperature and stress variation.
Such as Fig. 1, the configuration of the sensing enhanced sensitivity optical fiber structure 3 depends on the safety monitoring demand in practical application.This reality
It applies and enhanced sensitivity optical fiber structure 3 is sensed in example using simple optical fiber, the upper diaphragm 1 and the lower diaphragm plate 2 are embedded according to array
Between, specially described sensing enhanced sensitivity optical fiber structure 3 includes four row optical fiber, and three fibre optical sensors are inscribed respectively on each column optical fiber
4, therefore, 12 fibre optical sensors 4 are embedded between the upper diaphragm 1 and the lower diaphragm plate 2 altogether.To distinguish in same battery
Each fibre optical sensor 4, we introduce wavelength-division multiplex technique, that is, 12 inscribed fibre optical sensor 4 have it is different
Center reflection wavelength；Correspondingly, when the temperature change in battery, the reflection wavelength of the fibre optical sensor 4 will drift about,
Wavelength signals are handled eventually by the demodulating equipment of central office, obtain the thermo parameters method of inside battery.In other realities
It applies in example, the quantity of the fibre optical sensor 4 can adjust, and determined, realized to inside a certain battery core by monitoring intensive demand
Carry out the safety monitoring of multiple spot.Meanwhile it to avoid the crosstalk between each fibre optical sensor 4, needs reasonably to reserve wavelength
Interval, this is related to monitoring system expection measurement dynamic range.
When the fibre optical sensor embedded battery diaphragm is applied in the battery pack comprising multiple batteries, to simplify base
In the inside battery Safety monitoring system of fibre optical sensor embedded battery diaphragm, we adopt the battery diaphragm in different batteries
With identical configuration, i.e. embedded sensing enhanced sensitivity optical fiber structure 3 has universality.It simultaneously need to be to each battery in different batteries
Diaphragm distinguishes, we realize time-division multiplex technology by introducing fibre delay line between each battery, and the optical fiber prolongs
The length of slow line is limited within 20m.In combination with rational demodulation techniques realize based on fibre optical sensor embedded battery every
The real-time monitoring of the inside battery safety of film.It is demodulated through central office, the temperature field in battery or point of stress field can be obtained
Cloth, when temperature is excessively high or stress is excessive, when drifting beyond warning value of reflection wavelength, central office will be directly the same as in battery pack control
The heart communicates, and implements safeguard measure.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
With within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention god.
Claims (9)
1. a kind of fibre optical sensor embedded battery diaphragm, which is characterized in that including：Battery diaphragm and the embedded battery diaphragm
In sensing enhanced sensitivity optical fiber structure, the sensing enhanced sensitivity optical fiber structure includes multiple fibre optical sensors, the sensing enhanced sensitivity optical fiber
Structure is simple optical fiber, and the different fibre optical sensor of multiple wavelength is inscribed on the simple optical fiber.
2. fibre optical sensor embedded battery diaphragm as described in claim 1, it is characterised in that：The battery diaphragm has two
Layer, the sensing enhanced sensitivity optical fiber structure are embedded between two layers of battery diaphragm,.
3. fibre optical sensor embedded battery diaphragm as claimed in claim 2, it is characterised in that：The sensing enhanced sensitivity optical fiber knot
Cured between structure and two layers of battery diaphragm by polythene material.
4. fibre optical sensor embedded battery diaphragm as described in claim 1, it is characterised in that：The fibre optical sensor is complete
The online sensor of optical fiber.
5. fibre optical sensor embedded battery diaphragm as claimed in claim 4, it is characterised in that：The fibre optical sensor is cloth
Glug fiber-optic grating sensor.
6. fibre optical sensor embedded battery diaphragm as described in claim 1, it is characterised in that：When applied to including multiple electricity
When in the battery pack in pond, fibre delay line is set between each battery.
7. fibre optical sensor embedded battery diaphragm as claimed in claim 6, it is characterised in that：The length of the fibre delay line
Degree is limited within 20m.
8. fibre optical sensor embedded battery diaphragm as described in claim 1, it is characterised in that：The sensing enhanced sensitivity optical fiber knot
Structure includes multiple row optical fiber, and multiple fibre optical sensors are inscribed respectively on each column optical fiber.
9. the purposes of the fibre optical sensor embedded battery diaphragm as described in any one of claim 1-8, it is characterised in that：With
In carrying out safety monitoring to inside battery, temperature either stress or the pH value or electrolyte of the parameter of monitoring for inside battery
Ion concentration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610328230.XA CN105789525B (en) | 2016-05-18 | 2016-05-18 | Fibre optical sensor embedded battery diaphragm and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610328230.XA CN105789525B (en) | 2016-05-18 | 2016-05-18 | Fibre optical sensor embedded battery diaphragm and application thereof |
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| CN105789525A CN105789525A (en) | 2016-07-20 |
| CN105789525B true CN105789525B (en) | 2018-06-26 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| 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 |
| 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 |
| CN115360406A (en) * | 2022-08-19 | 2022-11-18 | 同济大学 | Optical fiber distributed lithium battery and manufacturing process thereof |
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| KR20120075236A (en) * | 2010-12-28 | 2012-07-06 | 주식회사 포스코 | Fuelcell stack and temperature measuring method thereof |
| 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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Patent Citations (4)
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| KR20120075236A (en) * | 2010-12-28 | 2012-07-06 | 주식회사 포스코 | Fuelcell stack and temperature measuring method thereof |
| CN104541387A (en) * | 2012-08-10 | 2015-04-22 | 巴特勒纪念研究院 | Optical monitoring of battery health |
| 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 |
| 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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| CN105789525A (en) | 2016-07-20 |
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