Zhu Hai Coslight Battery Co., Ltd

2017/03/21

Coslight Li-ion Pouch Power Cell Solution

Contents Coslight profile Coslight Li-ion pouch power cell solution

Li-ion pouch cell for power tool Li-ion pouch cell for EV

Coslight future R&D strategy on power cell

Coslight Confidential

About Coslight

HARBIN Headquarter

ZHUHAI Polymer

Established: 1987Year of Li-ion Business: 1998Major Business:

-Li-ion &Polymer Cell and Battery,-Lead Acid Battery, -EV &HEV, Backup Power System & Solution (Li-ion based) Register Capital: $USD 120mil2016 Revenue(Pouch): $USD 368milLand Area: Over 700,000m2

Building Area: Over 550,000m2

Employee: Over 15,000HK Stock Market: 1999, Code:1043

Coslight Confidential4

Coslight manufacture layout

Coslight Manufacture Base Layout

Delhi IndiaLand Area:100,000m3Staff numbers: 280

Zhuhai ChinaLand Area:160,000m3Staff numbers: 7,000

Shenzhen ChinaLand Area:80,000m3Staff numbers: 1,150

Tianjin ChinaLand Area:66,000m3Staff numbers: 350

Shenyang ChinaLand Area:110,000m3Staff numbers: 720

Headquarter HarbinLand Area:490,000m3Staff numbers: 5,200

5

Coslight Factory Information & Milestone

2016: Worldwide Top5 Li-ion pouch cell vendor Total capacity is over 5 billion Wh/year

2015: Enter China 1st batch “Vehicle Power Battery Company and Product List”

2007: Set up factory for Polymer Cell in Zhuhai(Zhuhai Coslight).

2006: Independent research and development LFP power cell.

2000: Start prismatic Li-ion cell production (Harbin Coslight)

1998: Started to Develop LIB

• Harbin Coslight

• Zhuhai Coslight

>1,000 R&D>15,000 Staffs

CE 2.5GWh/yrPower 2.5GWh/yr

>1,000,000 m2

Coslight Li-ion pouch cell capacity plan Zhuhai Coslight No.1 Industrial Park

Zhuhai Coslight No.2 Industrial Zone(Finished in 2018)

2.5

3.5

4.5

0.51

3

0

1

2

3

4

5

2016 2018 2020

Capa

city

(GW

h)

Coslight Li-ion pouch cell capacity plan

CE

Power

2020 2018 2017Coslight Confidential

Coslight Li-ion pouch cell developing strategy

8

Coslight pouch power tool cell- SpecificationNo Item Specification

1 Cell dimension 5.5*50*75mm (max Thickness*Width*Height)

2 Standard discharge cap Typical 2400mAh(min 2350mAh), Charge: 0.5C(1.2A),4.2V,0.05C(120mA) cut-off, Discharge: 0.2(480mA),2.5V cut-off, 1C=2400mA

3 Nominal voltage 3.6V

4 Impedance <15mΩ

5 Cell weight 40.0g max

6 Energy density 210Wh/kg, 430Wh/l

7 Standard charge cccv, 1.2A, 4.2V,120mA cut-off

8 Max charge cccv, 7.2A, 4.2V, 120mA cut-off (15~45oC)

9 Max continuous discharge 30A(@ RT)

10 Operating temperature（Surface temperature）

Charge: 0~50℃(recommended recharge release <45℃）

Discharge： -20 to 80℃(recommended re-dicharge release <60℃）

11 Storage temperature（Recovery 90% after storage） 1.5year -30~25℃, 3months -30~45℃, 1month -30~60℃

9

Coslight power tool cell- rate charge & discharge @RT

Charge rate CC ratio Charge time Temp. rise

3C 83.6% 33min 2oC

5C 82.5% 26min 5oC

8C 76.3% 22min 9oC

10C 72.6% 21min 12oC

13C 66.7% 20min 18oC

Discharge rate Capacity ratio Temp. rise

3C 94.3% 1oC

5C 91.4% 5oC

8C 90.2% 9oC

10C 88.1% 12oC

13C 86.6% 16oC

10

No Li-plating @ 0degC 1.0C, 5degC 3.0C , 25degC 5C 20CLS• 0degC 1.0C/0.5C 20T

• 5degC 3.0C/1.0C 20T

• 25degC 5.0C/1.0C 20T

Coslight power tool cell- Li-plating check

11

Minimal voltage at the beginning of -10oC 7C discharge is >3.0VCoslight power tool cell- -10oC discharge

No Minimal Voltage Discharge Time -10℃ 7C 3.0V RT 0.5C 3.0V Ratio1# 3.196V 375s 1714mAh 2381mAh 72%2# 3.185V 365s 1667mAh 2392mAh 70%

12

Coslight power tool cell- Cycle life

No. 1C/4C 3C/5C 0.5C/12.5C

500 cycles1# 103.63% 97.36% 108.56%

2# 104.33% 97.11% 107.77%

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Coslight pouch EV cell- SpecificationNo Item Specification

1 Cell dimension 6.3*174*238mm (max Thickness*Width*Height)

2 Standard discharge cap Typical 29.6Ah(min 29Ah), Charge: 0.5C,4.2V,0.05C cut-off, Discharge: 0.5C, 2.7V cut-off, 1C=29Ah

3 Rated discharge capacity Min 26.1Ah, Charge: 0.5C, 4.2V, cccv 0.05C cut-off, Discharge: 5C,2.7V cut-off

4 Nominal voltage 3.7V

5 Impedance <1.2mΩ

6 Cell weight 521g max

7 Energy density 215Wh/kg, 412Wh/l

8 Standard charge cccv, 0.5C, 4.2V, 0.05C cut-off

9 Max charge cccv, 2C, 4.2V, 0.05C cut-off

10 Max continuous discharge 5C

11 Operating temperature（Surface temperature）

Charge: 0~45℃

Discharge： -20 to 60℃

12 Storage temperature（Recovery 80% after storage） 7 year -30~25℃, 3 year -30~45℃, 1.5 year -30~60℃

14

Coslight EV cell- rate charge & discharge @RT

Charge rate CC ratio Charge time Temp. rise

0.2C 98.9% 5h18min 0.61oC

0.5C 96.4% 2h11min 1.2oC

1C 92.6% 1h13min 2.0oC

2C 86.6% 45min 6.1oC

3C 82.8% 36min 12.4oC

Discharge rate Capacity ratio Temp. rise

0.5C 100% ~0oC

1C 97.6% 2.0oC

3C 94.7% 12oC

5C 90.4% 24oC

15

Coslight EV cell- charge capability Continuous charge window @ different temp. Max pulse charge current @ 50%SOC.

-30°C -20°C -10°C 0°C 10°C 20°C 35°C 45°C 55°C

Continuous charge current N/A 0.05C 0.1C 0.3C 1.0C 2.0C 3.0C 3.0C 2.0C

20s Charge Current @50%SOC 0.2 C 0.5 C 1 C 3 C 4 C 6 C 9 C 10C 11 C

6.0C

5.0C4.0C

3.0C

2.0C

1.0C

0.5C

0.3C

0.2C

0.1C

0.05C

-30°C -20°C -10°C 0°C 10°C 20°C 35°C 45°C 55°C

OK

16

-30°C -20°C -10°C 0°C 10°C 20°C 35°C 45°C 55°C20s Discharge Current @

50% SOC 2C 4C 7C 8C 10C 10C 14C 15C 17C

Temperature Test Condition Power Value (W)

25℃

50%SOC,10s, 2.5VCut off 1200

20%SOC,10s, 2.5VCut off 900

-30℃

50%SOC,10s, 2.3VCut off 105

20%SOC,10s, 2.3VCut off 65

Max pulse discharge current @ 50%SOC.Coslight EV cell- discharge capability

Coslight EV cell- Cycle life

Model 25℃1C/1C cycle number Remain capacity

CA60G4P0-29Ah 2500 ~84%

NCA+SiFurther improvement onenergy density, safety, powerdensity and cycle life

By 2020, gravimetric energy density reaches 300Wh/kg, cycle life is over 2000 .

Solid electrolyte

2016 2020 2025

PEO base SPE is under developing, cycle life is ~500 cycles

By 2025 with new polymer cycle life could reach 2000, gravimetric energy density > 400Wh/kg

As the power source of EV, Lithium-ion battery will take the leading role at least up to 2025. And by 2020, gravimetric energy density will reach 300Wh/kg compared with present ~230Wh/kg.

Coslight power cell future R&D strategy

Li-SAt present, Li-S system cycle life

is ~200 cycles

By 2028, Li-S system cycle life may reach 1500, gravimetric energy density > 500Wh/kg,

Solid polymer electrolyte battery introduction

19Coslight Confidential

Roll-to-roll manufacturing

Cu foil

Al foil

Solid polymer electrolyteLithium metal

High ED

High security

Flexibility

22.5

33.5

44.5

PEO LFP NCA LCOVolta

ge (V

)

Narrow electrochemical window

Obvious oxidationabove 4V

Ioni

c co

nduc

tivity

(s/c

m)

Temperature (°C)Low ionic conductivity

PEO

Merits Demerits

Coslight work on polymer solid-state battery

Design capacity: 480 mAh

Predicted life: 80%@500cycles

Nail test: No fire, no explosion

LFP/SPE/Li pouch sample cell

20Coslight Confidential

Nail test

Solid battery Liquid LIB

60

70

80

90

100

110

20

40

60

80

100

120

0 100 200 300 400 500 600

Coul

ombi

c Eff

icie

ncy

(%)

Capa

city

ratio

(%)

cycle numbers

Cycling testing at 60 °C, 0.5C/0.5CCapacity ratio Coulombic Efficiency

Strategies to improve the performance

21Coslight Confidential

LithiumSPE

Cu foil

NCM+SPEAl foil

Lithium + Passive filmSPE + Frame substrate

Cu foil

NCM+SPEAl foil

Cathode coating

Impr

ovem

ent

Passive film on lithiumAdd frame substrate in SPE

Thinner Lithium

Thicker cathode electrode Thinner SPE layer Higher energy density

Higher mechanical strength

Lower interface impedanceLithium dendrite inhibition

New polymer electrolyte Wider electrochemical window

Merits of Li-S battery

22Coslight Confidential

High capacityElemental prices (Feb, 2017)

Element Price US$/t) Price ratio Website

Sulfur 120 1 http://www.sunsirs.com

Cobalt 6000 50 http://www.lme.com/Nickel 11000 92 http://www.lme.com/

Low cost

High abundance High energy density

2500 2800

4201400

Gravimetric energydensity (Wh/kg)

Volumetric energydensity (Wh/L)

Li-S battery Li-ion battery (NCM/Graphite)

Coslight work on Li-S battery

23Coslight Confidential

1.6

2.1

2.6

0 400 800 1200

Volta

ge (V

)

Capacity (mA h/g)

Charge-discharge profile

406080

100

0 100 200

Capa

city

rete

nsio

n (%

)

Cycle number

25℃ 0.5C Cycling capability

C/S cathode: ~76 wt.% S content Specific capacity (coin cell): ~1200 mAh/g Cycling test (coin cell): ~200 cycles@80%

Technical direction: (1) Low-cost & large-scale C/S composite;(2) Novel high-performance binder material.

24

Summary

• Coslight plans Li-ion pouch cell developing strategy based on CE, EV and PT

application;

• Coslight Li-ion pouch PT and EV battery of present generation shows

promising performance;

• Coslight future R&D strategy is based on NCA+Si, Solid-EL and Li-S system.

Zhuhai Coslight Battery Co., Ltd.No.209 Zhufeng Way,Xinqing Science and Technology ParkDoumen District,Zhuhai 519180,P.R.ChinaTel:+86-6199909Fax:+86-6199910www.cncoslight.com

THANKS

Coslight Confidential

Contacts info:Sales VP: 林文德/Eric Lin eric@cncoslight.comR&D : 李涛/Tony Li litao@coslight-zh.com