Your SlideShare is downloading. ×
Evlib2009forum7
Evlib2009forum7
Evlib2009forum7
Evlib2009forum7
Evlib2009forum7
Evlib2009forum7
Evlib2009forum7
Evlib2009forum7
Evlib2009forum7
Evlib2009forum7
Evlib2009forum7
Evlib2009forum7
Evlib2009forum7
Evlib2009forum7
Evlib2009forum7
Evlib2009forum7
Evlib2009forum7
Evlib2009forum7
Evlib2009forum7
Evlib2009forum7
Upcoming SlideShare
Loading in...5
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×
Saving this for later? Get the SlideShare app to save on your phone or tablet. Read anywhere, anytime – even offline.
Text the download link to your phone
Standard text messaging rates apply

Evlib2009forum7

532

Published on

presentations of EV/LIB Forum held in China 2009, totally 8 parts.

presentations of EV/LIB Forum held in China 2009, totally 8 parts.

Published in: Technology
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total Views
532
On Slideshare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
6
Comments
0
Likes
0
Embeds 0
No embeds

Report content
Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
No notes for slide

Transcript

  • 1. Background-Key Materials Challenges Safety The number one concern for passenger vehicles Availability Meet a wide temperature range of -30 to 60 Durability Cycle and calendar life must allow for 10~15 years of battery operation Cost Batteries for EV with large batteries require low cost Cathode Chemistry in Lishen KPI of Cathode Materials Voltage Capacity / Cycle Life Cost Safety Range/V (mAh/g) LiMn2O4 3.0-4.2 100 120 Good Low Better LiFePO4 2.0-3.6 130 150 Excellent Low Excellent NCM 2.5-4.2 150 Better High Good NCA 2.5-4.2 150 Better High Good ‡At least four different cathode chemistries are being considered in power battery ‡NCA and NCM are the choices for high energy density ‡LFP shows the lowest energy density due to low voltage and low material density
  • 2. Safety of Cathode Material DSC of LiNi1/3Co1/3Mn1/3O2 LiMn2O4 LiFePO4 and Electrolyte at 4.3V ‡Most cathode materials exhibit a strong exothermal reaction with the electrolyte in the charged state which can lead to a thermal runaway of the battery ‡LFP is completely stable and allows the development of an intrinsically safe cell Study on LiFePO4 in Lishen—Basic Performance Energy Type Power Type Items A B C D E F G H Surface area (m2/g) 9 11 16 10 14 18 15 14 Tapped density (g/cm3) 0.8 1.0 0.9 1.1 1.0 1.0 1.0 0.6 Particle size ( m) (D10) 2.2 1.5 0.6 1.1 0.8 0.75 0.2 0.2 (D50) 5.4 3.4 2.3 4.2 4.5 5.1 0.8 0.6 (D90) 9.1 5.9 11.2 10.3 12.2 16.6 4.8 5.0 Moisture (ppm) 420 800 300 500 1100 100 410 700 Discharge capacity (mAh/ 148 150 145 148 145 143 143 152 g) Processability Hard Hard Hard Hard OK OK Hard Harder
  • 3. Study on LiFePO4 in Lishen—SEM A B C D Study on LiFePO4 in Lishen—SEM E F G H
  • 4. Study on LiFePO4 in Lishen—Discharge Performance Discharge Performance: A E B C D F Study on LiFePO4 in Lishen—Cycle Life Cycle Life( According to cycle life trend line): B C A E D
  • 5. Study on LiFePO4 in Lishen—Discharge Performance Discharge Performance: G E Study on LiFePO4 in Lishen—Safety performance No Hot Oven Nail Penetration No Explosion 150 /10min Nail: 3- 8mm, Explosion No Fire Speed:10-40mm/s No Fire No No Explosion Over Safety & Abuse Over Explosion No Fire Discharge Testing Charge No Fire 1C/10V No No Explosion Crush Short Circuit Explosion No Fire No Fire All the Materials are Safe!
  • 6. Anode Chemistry in Lishen Properties of anode materials Item MCMB HC SC LTO Structure SEM KPI of anode materials Particle size Capacity Tap Density/ Advantage Disadvantage D50/( m) /(mAh/g) (g/cc) Graphite Low cost; Low temp.; 8.104 300 1.3 (MCMB) High capacity Rapid charge Energy; Initial Hard High Power; 9.146 430 0.9 Longevity Efficiency; low Carbon tap density Low energy Soft 11.216 360 0.8 Low cost; Longevity density; low tap Carbon density High Power; Longevity Low energy Li4Ti5O4 9.7 150 1.2 density Low Temp.; Safety
  • 7. Charge curves of anode materials No SEI forming, which can improve the low temp. electron Anode electrode Potential (V) conductivity. the voltage Vs. Li is 1.5V, which can effectively avoid Hard carbon has the excellent the creating of the lithium specific capacity, and the charge dendrites. and discharge curve shows good gradient, which is propitious to estimate the SOC of the battery . 1.5V Vs Li LTO Hard Carbon The properties of soft carbon Soft Carbon is between hard carbon and artificial graphite. Graphite 0.1V Vs Li Charge Capacity (mAh) Electrochemical performances—rated discharge Because of the intrinsic properties, hard carbon is benefit to be discharged at large current. The hard carbon displays the higher voltage than soft carbon and MCMB at high rate discharge.
  • 8. Electrochemical performances—rated charge LTO shows excellent high rate charging property, which is better than HC and SC, and the high rate charging capacity of the MCMB is the least. Time of charging to 90%SOC (10C) Anode Time/min MCMB 12.8 HC 7.3 SC 5.4 LTO 5.6 Electrochemical performances—cycle life
  • 9. Low temperature performance Conclusions Batteries are the primary barrier in making electric-drive vehicles possible. Li-ion batteries can best meet the electric-drive challenge; LiFePO4 is an intrinsically safe system with good cycle life. At present LiFePO4 platform is one of the best choice for EV/HEV application in Lishen; MCMB and hard carbon are used in Lishen present EV/ HEV cell products; Li4Ti5O12 has higher rate charge ability (at low Temp. vs. AG) , so it seems that Li4Ti5O12 is the best choice for next generation HEV application; Raw material is one of the key premise for good battery, but the electrode process is a big challenge for battery maker due to the property of LiFePO4. Lishen has sound base and enough manufacture experience to penetrate the EV market.
  • 10. Thank You!
  • 11. '! ! !( #( #% $! % ## !! !##
  • 12. #! ! - !#!( !
  • 13. #! #! !#( * (%.#!+% /+ '! !( #! ) !+ , %) % #! #! #! !# %
  • 14. ! # ! ! ! #
  • 15. #
  • 16. $
  • 17. $ ( *,(+)/ * # $
  • 18. Solar Wind $
  • 19. %$* ! %$) %$( %$' %$ %$ % %$ %$ % % %$ %$ %$' ! ' ! !
  • 20. $ +/( * )-( * , ),( , )/(
  • 21. !
  • 22. $ !
  • 23. % . .
  • 24. $ +/*
  • 25. )(2 !
  • 26. %
  • 27. ,%,
  • 28. $ ,*(( $ ,((2 !
  • 29. %
  • 30. % % ## % (
  • 31. #
  • 32. $!
  • 33. #
  • 34. $!
  • 35. #
  • 36. $!
  • 37. ) #) % % ')') ° # '*) °
  • 38. # # * 2 3 4 5 (*( ° '*!*- 1
  • 39. $ .(* # # # # % 1 2 3 4 5
  • 40. $ $ %
  • 41. ( (''$)''
  • 42. )
  • 43. !
  • 44. (1st cycle rate: C/20, other cycles: C/5) ( -, !
  • 45. % ( $
  • 46. % % % $ % $ %
  • 47. '
  • 48. /$ /- ).,,0*
  • 49. %
  • 50. !

×