Research And Application of Fiber Bragg Grating Temperature Sensor For Energy Storage Battery In-situ Detection

Transcription

1 Research And Application of Fiber Bragg Grating Temperature Sensor For Energy Storage Battery In-situ Detection Chong Xu China Electric Power Research Institute

2 Outline Introduce of our Department Principle of the experiment Experiment details Summary of our works

3 Energy Storage and Electrotechnics Department Complete system of testing and R & D Different types Different packages Various testing BYD, Toshiba, HITACHI, ATL, GE, Altairnano External Characteristics Area Testing Technology Area Internal Characteristics Area Trial production Area

4 In-situ Detection Complex recession mechanism Different internal and external characteristics Different Manufacturer standards In-situ Detection Without damage Minimize interference More accurate and fast

5 Fiber Optic Sensor Anticorrosi on Easy to expand Simple structu re High preci sion Low loss Fast respon se

6 Fiber Bragg Grating Sensor FBG Structure: Passive filter device FBG Sensor Sensing principle FBG Reflection spectrum

7 Design Research on the Types and Scope of Multifunctional Fiber Analysis of In-situ Detection Requirements for Lithium Ion Batteries Small- Scale Anticorrosi on Reliab ility Geometry structure Determining the application of Fiber Bragg Grating sensor for In-situ detection Structure Design, Device Trial and Performance Analysis of FBG Sensor Obtain the multifunctional fiber sensor sample suitable of lithium ion batteries Coating materials In-situ Detection In-situ detection condition Feasibility Analysis of Battery Measurement by Multifunctional Fiber Design and Experimental Study on In-situ Detection Technology of Batteries In-situ detection method Evaluation of Optical Fiber Sensor in In-situ Detection

8 Design Glass Tube Stainless Tube Palladium recoat Plastic Tube Gold Problem Lack of adhesion Palladium Lack of adhesion Silver Lack of adhesion Sliver recoat Acrylate coat Glass Tube Stainless Tube Size Plastic Tube Rigidity, Reliability

9 Performance Evaluation Labview Calibration system Chamber: Setting ambient temperature Thermal Monitor: Calibrating temperature FBG Demodulator: Demodulating wavelength FBG Reflection spectrum

10 Performance Evaluation Glass Tube diameter of the glass tube is 0.5mm minimize the influences on the battery. Inside the cladding the front end is sealed Wavelenth(nm) Tempurature( ) Slope: 0.01nm/ Good Linearity Accuracy level:0.1 Range:20 ~70

11 Performance Evaluation Compared with Platinum resistance sensor Error less than 1% The response time is slower than original sensor, but is acceptable

12 Performance Evaluation Fixing method Easy to fix Fixing the FBG at the electrode Chemical reaction is active Battery sealability Packaging process Battery with FBG inside

13 Situ-detection system Situ-detection system: Charge/Discharge equipment FBG Sensor Thermal Monitor FBG Demodulator Computer(Labview) 4 Channel measurement achieved by Labview Charge/Discharge equipment for simulating the working status of batteries 2 Sensors for each battery

14 Charge/Discharge Experiment Voltage(V) Internal temperature Charge and dischage voltage External 19 temperature Time(S) Temperature( ) Voltage(V) Charge and dischage voltage Anode temperature Cathode temperature Time(s) Temperature periodically changed with the charge and discharge voltage Internal temperature is higher than external temperature periodically changed with the charge and discharge voltage Anode temperature is higher than Cathode temperature In-situ detection is feasible by FBG sensor

15 Stain measurement of battery surface To find the relationship between internal temperature and battery status, we put a strain sensor outside the battery Stain sensor for deformation measurement FBG sensor for outside temperature

16 Charge/Discharge Experiment Switch time of charge/discharge Temperature Strain Voltage Strain Surface strain changed with the internal temperature periodically The maximum value of deformation appears at Switch time of charge/discharge Focus on the Switch time of charge/discharge and set a reasonable security threshold

17 Summary To provide corrosion, different packaging and coating methods were tested and glass tube was the best choice. The glass tube packaging senor was evaluated, the accuracy level is 0.1, the range is 20 ~70, the response time is reasonable. Battery In-situ detection system is built and the In-situ detection is feasible by FBG sensor. The relationship about the anode/cathode temperature, internal/external temperature and charge/discharge voltage was defined. The relationship between the strain of battery surface and charge/discharge voltage was defined. Focus on the Switch time of charge/discharge and set a reasonable safety threshold.

18 Thank You!