WANXIANG EV CO., LTD.WANXIANG EV CO., LTD. has studied polymer lithium-ion batteries for over five...

WANXIANG EV CO., LTD.WANXIANG EV CO., LTD.WANXIANG EV CO., LTD.

Battery Business DepartmentBattery Business DepartmentBattery Business Department

CatalogueCatalogueCatalogue

Introduction

Battery Specifications

Production System

Revolution of Lithium-ion Battery

Advantages of Polymer Lithium-ion Battery

Performance of Polymer Lithium-ion Battery

Safety Testing

Application Field

Development Planning

WanxiangWanxiangWanxiang Electric Vehicle Co., LtdElectric Vehicle Co., LtdElectric Vehicle Co., Ltd

Wanxiang Electric Vehicle Co., Ltd was

founded in 2002, and is a sub-company

controlled entirely by Wanxiang Group.

Wanxiang EV Co., Ltd focuses on

mastering clean-energy technology &

developing energy-saving and environm-

ent-protecting vehicle. According to the

development strategy of “battery-motor-electrical control-electrical vehicle”, Wanxiang

EV company has made outstanding achievements in the fields of high power polymer

l i t h i u m - i o n b a t t e r y , i n t e g r a t i o n m o t o r a s w e l l a s d r i v e - c o n t r o l

system, whole vehicle electronic \control system, automobile engineering

i n t e g r a t i o n t e c h n i q u e , t e s t - t r i a l p l a t f o r m a n d s o o n .

Shanghai Challenge Shanghai Challenge Shanghai Challenge BibendumBibendumBibendum

In the Shanghai Challenge Bibendum, Wanxiang

EV Company won the 4 A prize which awarded

b y i n t e r n a t i o n a l v e h i c l e a s s o c i a t i o n .

Now Wanxiang electric buses have been running

normally along the beach of the West Lake.

Company has studied polymer lithium-ion batteries for

over five years，and made a great progress on the research

of electrolyte, cathode material and security of polymer

lithium-ion battery (PLB). The battery won’t explode or

catch fire in extreme circumstances, such as crush,

penetration or short-circuit etc.. The products are certified

by National Authority, and the performance of the PLB

k e e p s o n t h e p r e m i e r .

EEE---BUSBUSBUS

The E-BUS has run 150,000 kilometers along the beach of the West Lake (Y9 Line).

CertificationCertificationCertification

Certification Certification Certification (CE)(CE)(CE)

Certification Certification Certification (UL)(UL)(UL)

Testing ReportTesting ReportTesting Report

Battery SpecificationsBattery SpecificationsBattery SpecificationsSpecification 25.9V/8Ah 37V/8Ah 37V/10Ah 48.1V/20Ah 48.1V/30Ah 48.1V/40Ah 48.1V/100Ah 66.6V/40Ah 38.4V/100Ah

Rated Capacity (Ah) 8 8 10 20 30 40 100 40 100

Nominal Voltage (V) 25.9 37.0 37.0 48.1 48.1 48.1 48.1 66.6 38.4

Charge Cut-off Voltage (V) ≤29.4 ≤42.0 ≤42.0 ≤54.6 ≤54.6 ≤54.6 ≤54.6 ≤75.6 ≤45.6

Discharge Cut-off Voltage (V) ≥21.0 ≥30.0 ≥30.0 ≥39.0 ≥39.0 ≥39.0 ≥39.0 ≥54.0 ≥30.0

Charge Current ≤0.5C ≤0.5C ≤0.5C ≤0.5C ≤0.5C ≤0.5C ≤0.5C ≤0.5C ≤0.5C

Work Current 0.5C 0.5C 0.5C 0.5C 0.5C 0.5C 0.5C 0.5C 0.5C

Maximum Discharge Current 2C 2C 2C 2C 2C 2C 2C 2C 2C

Weight (kg)(Not Including Casing) 1.8 2.5 3.1 7.6 11.5 15.2

Weight (kg)(Including Casing) 2.3 3.2 3.8 9.5 13.5 17.3 58 34 54

Internal Resistance (mΩ) ≤50 ≤50 ≤50 ≤50 ≤50 ≤50 ≤50 ≤50 ≤50

Length 245 235 260 245 245 245

Width 85 95 95 150 150 150

Thickness 60 65 80 120 170 240

Length 275 275 275 540 490 295

Width 160 160 160 330 160 160

Thickness 165 215 285 300 320 840

Application Field EB EB EB EM EM EM Industrial Power Source EV EV（LiFePO4）

Dimensions (mm)(Including Casing)

Dimensions (mm)(Not Including

Casing)

Note：（1）66.6V40Ah indicates one module. The module consists of 18PCS LiMn2O4 cells in series and one BMS（LECU，Local Electric Control System）. The whole EV&HEV power source consists of a number of modules in series or in parallel and BMS（CECU，Central Electric Control System）.（2）38.4V100Ah indicates one module. The module consists of 12PCS LiFePO4 cells in series and one BMS（LECU，Local Electric Control System）. The whole EV&HEV power source consists of a number of modules in series or in parallel and BMS（CECU，Central Electric Control System）.

DeviceDeviceDevice＆＆＆TechnologyTechnologyTechnology




Historical Technical Revolution of LithiumHistorical Technical Revolution of LithiumHistorical Technical Revolution of Lithium---ion Batteryion Batteryion Battery

The first generation: lithium battery (The former of

lithium-ion battery)

The second generation: liquid lithium-ion battery

The third generation: polymer lithium-ion battery 。

Technical Superiority of Polymer LithiumTechnical Superiority of Polymer LithiumTechnical Superiority of Polymer Lithium---ion Batteryion Batteryion Battery

Ni- Cd

Ni- MH

Li- ion LIPB

Incredible SafetyIncredible SafetyIncredible Safety

1. No exploding or catching fire

2. No leakage of liquid electrolyte

3. Design flexibility

4. High energy density

5. Environment protection, no memory effect

Internal structure of polymer lithiumInternal structure of polymer lithiumInternal structure of polymer lithium---ion batteryion batteryion battery

Polymer lithium-ion batteries adopt

s t acked s t ruc ture and ge l po lymer

electrolytes, which are in favor of the

development of thin batteries with design

f lexibi l i ty. The use of gel polymer

electrolytes enables fabrication of safe

batteries, which won’t explode or catch fire

in extreme circumstances, such as crush,

penetration or short-circuit etc.. So

polyester-aluminum pouch as the package of

battery can contribute to the improvement of

e n e r g y d e n s i t y .

Charge and Discharge Mechanism of Charge and Discharge Mechanism of Charge and Discharge Mechanism of Polymer LithiumPolymer LithiumPolymer Lithium---ion Batteryion Batteryion Battery

In polymer lithium-ion batteries,

liquid electrolytes are replaced by gel

polymer electrolytes. The gel polymer

electrolytes not only have good ionic

conductivity, but also can act as

separator in polymer battery. The

electrodes of polymer lithium-ion

battery are basically the same as

liquid lithium-ion battery, so the

working principles of them are similar.

Figure1 is the charging and discharging principle of polymer lithium-ion battery. During

the process of charge and discharge, lithium ions intercalate into and de-intercalate from the

electrodes through the gel polymer electrolytes. And then the battery converts chemical

e n e r g y i n t o e l e c t r i c e n e r g y .

Positive MaterialsPositive MaterialsPositive Materials

Spinel lithium manganese oxide has been investigated extensively as a

promising positive material for polymer lithium-ion battery because of the

following advantages: (1) abundance and low cost; (2) environment

protection; (3) good safety and overcharge resistance. The cycle performance

at room temperature and elevated temperature has been improved

e x t e n s i v e l y b y m o d i f y i n g t h e sp ine l L i -Mn-O compound .

Negative MaterialsNegative MaterialsNegative Materials

Negative materials have special advantages in structure and morphology: (1) spherical structure with high pile-density is available for compact filling and the improvement of energy density. (2) small specific surface area improves safety and reduces the irreversible capacity loss resulted from the formation of SEI layer during the initial charge/discharge cycle. (3) layered graphitic structure is in favor of reversible intercalation/deintercalation of lithium ions. (4) special sphere and stable inner structure permit high rate charge and discharge.

Polymer Electrolyte MembranesPolymer Electrolyte MembranesPolymer Electrolyte Membranes

Figure. SEM images of polymer electrolyte membrane

The gel polymer electrolytes not only have good ionic conductivity, but also can

act as separator in polymer battery. The liquid electrolyte and lithium salt are

absorbed sufficiently, which can ensure the inner gel system and safety of battery.

Electrochemical performance of polymer lithium-ion battery

0 50 100 150 200 250 300 3500

2000

4000

6000

8000

10000

12000

14000

16000

180000 50 100 150 200 250 300 350

Cycle Number/N

Disc

harg

e C

apac

ity/m

Ah

0

10

20

30

40

50

60

70

80

90

100

110

Rated Capacity:15000mAhCharge:0.5C to 4.2V(CC/CV) End Current:0.05CDischarge:0.5C to 3.0V

Capacity R

atio(%vs.15654m

Ah)

1、Cycle performance at room temperature

Cycle performance of 15Ah high energy densitypolymer Li-ion battery at room temperature (25±5℃)

0 100 200 300 400 500 6000

2000

4000

6000

8000

10000

12000

14000

16000

0 100 200 300 400 500 600

Rated Capacity:15000mAhCharge:1C to 4.2V(CC/CV) End Current:0.1CDischarge:2C to 3.0V

Cycle Number/ND

isch

arge

Cap

acity

/mA

h0

10

20

30

40

50

60

70

80

90

100 Capacity R

atio(%vs.15562m

Ah)

Cycle performance of 15Ah high rate polymer Li-ion battery at room temperature (25±5℃)

Charge PerformanceCharge PerformanceCharge Performance

0 50 100 150 200 250

3.2

3.4

3.6

3.8

4.0

4.2

0 50 100 150 200 250

C0.3C=15220mAhC

3C=14120mAh

C3C

/C0.3C

=92.8%

Vol

tage

/ V

Charge time/ min

0.3 C 0.5 C 1 C 2 C 3 C

2、Charge Performance

High rate charge performance of 15Ah high energy

density polymer Li-ion battery

at room temperature (25±5℃)

0 2000 4000 6000 8000 10000 12000

3200

3400

3600

3800

4000

4200

0 2000 4000 6000 8000 10000 12000

Charge Time / s

C0.3C=8711C5.0C=8581C5.0C/C0.3C=98.51%

Vol

tage

/mV

0.3C 1.0C 2.0C 3.0C 4.0C 5.0C

High rate charge performance of 15Ah high rate

polymer Li-ion battery

at room temperature (25±5℃)

Rated discharge performanceRated discharge performanceRated discharge performance

-2 0 2 4 6 8 10 12 14 16 18

3.0

3.2

3.4

3.6

3.8

4.0

4.2

Vol

tage

/ V

Discharge Capacity / Ah

0.3 C 0.5 C 1 C 2 C 3 C

3、 Discharge performance

High rate discharge performance of 15Ah high energy

density polymer Li-ion battery as a function of C rate.

-2000 0 2000 4000 6000 8000 10000 12000 14000 16000

3000

3200

3400

3600

3800

4000

4200

Vol

tage

/ mV

Discharge Capacity/ mAh

0.3C 2.0C 4.0C 6.0C 8.0C 10.0C 11.0C 12.0C 13.0C

High rate discharge performance of 15Ah high rate

polymer Li-ion battery as a function of C rate.

Low temperature performance

4、 Low temperature performance

0 2000 4000 6000 8000 10000 12000 14000 16000

3000

3200

3400

3600

3800

4000

4200

Vol

tage

/mV

Discharge Capacity/mAh

Discharge curve of 15Ah polymer Li-ion battery as a function of temperature. 1)25℃；2)-20℃

Battery Pack Discharge PerformanceBattery Pack Discharge PerformanceBattery Pack Discharge Performance

0 10 20 30 40 50 60

3000

3200

3400

3600

3800

4000

4200

37V15Ah the 22th discharge curveDischarge Current:15A

Cel

l Vol

tage

/ mV

Discharge Time/ minute

0 10 20 30 40 50 60

30

32

34

36

38

40

42

Bat

tery

Pac

k V

olta

ge/ V

Discharge Time/ minute

1、 Battery Pack Discharge Performance

Lithium Iron Phosphate Battery Lithium Iron Phosphate Battery Lithium Iron Phosphate Battery （（（LiFePOLiFePOLiFePO444）））

1、Cycle performance at room temperature

Cycle performance of high energy density LiFePO4 polymer Li-ion battery at room temperature (25±5℃)

0 100 200 300 400 500 6000

2000

4000

6000

8000

10000

12000

14000

Cap

acity

/ Ah

Number/ N

Rate Capacity:15000mAhCharge:0.5C to 4.2V(CC/CV), End Current:0.05CDischarge:0.5C to 2.0V

635Cycles 94.4% 635Cycles 94.2%

Lithium Iron Phosphate Battery Lithium Iron Phosphate Battery Lithium Iron Phosphate Battery （（（LiFePOLiFePOLiFePO444）））

-20 0 20 40 60 80 100 120 1402.2

2.4

2.6

2.8

3.0

3.2

3.4

3.6

3.8

4.0

4.2-20 0 20 40 60 80 100 120 140

Vol

tage

/ V

Charge Time/ min

0.5C

2、Charge/Discharge Performance

Charge/Discharge performance of high energy density

LiFePO4 polymer Li-ion battery at room temperature (25±5℃)

-10 0 10 20 30 40 50 60 70 80 90 100 1101.8

2.0

2.2

2.4

2.6

2.8

3.0

3.2

3.4

3.6

0.5C 1.0C

Vol

tage

/ V

Capacity/ Ah

3、 Discharge performance

High rate discharge performance of high rate LiFePO4

polymer Li-ion battery as a function of C rate.

Lithium Iron Phosphate Battery Lithium Iron Phosphate Battery Lithium Iron Phosphate Battery （（（LiFePO4LiFePO4LiFePO4）））

0 2000 4000 6000 8000 10000 12000 14000 160001800

2000

2200

2400

2600

2800

3000

3200

3400

3600

3800

4000

Vol

tage

/ mV

Capacity/ mAh

1C 99.6% 2C 99.6% 3C 99.4% 4C 99.3% 5C 99.3% 6C 99.0% 7C 98.2% 8C 96.0% 9C 92.6% 10C 86.8%

4、 Battery Pack Charge Performance

Charge performance of high energy density

LiFePO4 polymer Li-ion battery pack

Lithium Iron Phosphate BatteryLithium Iron Phosphate BatteryLithium Iron Phosphate Battery（（（LiFePO4LiFePO4LiFePO4）））

0 50 100 150 200 250 300 35038

40

42

44

46

48

50

52

54 13S15Ah LiFePO4 Battery PackCharge at 3A by Charger

Vol

tage

/v

Time/min0 50 100 150 200 250 300 350 400

3000

3200

3400

3600

3800

4000

4200

4400

13S20Ah LiFePO4 3A Charge

Vol

tage

/mv

Time/min

1 2 3 4 5 6 7 8 9 10 11 12 13

Charge performance of various cell in high

energy density LiFePO4 polymer Li-ion battery pack

0 20 40 60 80 100 120 140

26

28

30

32

34

36

38

40

42

44

46

13S15Ah LiFePO4 0.5C Discharge

Vol

tage

/V

Time/min

Lithium Iron Phosphate BatteryLithium Iron Phosphate BatteryLithium Iron Phosphate Battery（（（LiFePO4LiFePO4LiFePO4）））

5、 Battery Pack Discharge Performance

-10 0 10 20 30 40 50 60 70

26

28

30

32

34

36

38

40

42

44

46

13S15Ah LiFePO4 1C DischargeV

olta

ge/V

Time/min

Discharge performance of high energy density LiFePO4 polymer Li-ion battery pack

LiMnLiMnLiMn222OOO444Safety Testing Safety Testing Safety Testing －－－ CrushCrushCrush

Before Crush Crushing

LiMnLiMnLiMn222OOO444Safety Testing Safety Testing Safety Testing －－－ CrushCrushCrush

After Crush

LiMnLiMnLiMn222OOO444Safety Testing Safety Testing Safety Testing －－－ PenetrationPenetrationPenetration

Before Penetration Penetrating


After Penetration


Before Penetration Penetrating


After Penetration

LiMnLiMnLiMn222OOO444Safety Testing Safety Testing Safety Testing －－－ ShortShortShort---circuit Testcircuit Testcircuit Test

Before Short-circuit Test Short-circuit Test

After Short-circuit Test

LiMnLiMnLiMn222OOO444Safety Testing Safety Testing Safety Testing －－－ ShortShortShort---circuit Testcircuit Testcircuit Test

LiMnLiMnLiMn222OOO444Safety Testing Safety Testing Safety Testing －－－ Overcharge Test

Before Overcharge Test Overcharge Testing

LiMnLiMnLiMn222OOO444Safety Testing Safety Testing Safety Testing －－－ Overcharge Test

Overcharge Testing Test Monitoring

LiMnLiMnLiMn222OOO444Safety Testing Safety Testing Safety Testing －－－Heating

Heating Test Heating Test Monitoring

LiMnLiMnLiMn222OOO444Safety Testing Safety Testing Safety Testing －－－ Temperature Cycling

Temperature Cycling Test

Voltage and Resistance of Battery After Temperature Cycling Test

LiMnLiMnLiMn222OOO444Safety Testing Safety Testing Safety Testing －－－ Temperature Cycling

LiFePOLiFePOLiFePO444Safety Testing Safety Testing Safety Testing －－－ Penetration

LiFePOLiFePOLiFePO444Safety Testing Safety Testing Safety Testing －－－ CrushCrushCrush

LiFePOLiFePOLiFePO444Safety Testing Safety Testing Safety Testing －－－ OverchargeOverchargeOvercharge

LiFePOLiFePOLiFePO444Safety Testing Safety Testing Safety Testing －－－ Crush

Crush Test by National Authority Institute （201 Institute）

Test ConclusionTest ConclusionTest Conclusion

The wanxiang polymer lithium battery won’t explode or catch

fire in extreme circumstances, such as crush, penetration or short-

circuit etc.

Application FieldApplication FieldApplication Field

Polymer lithium-ion battery is more superiority than liquid lithium-ion battery

in safety performance, so governments chiefly choose polymer lithium-ion battery

as power battery. After key technical breakthrough, research a system solution with

stability and high efficiency for polymer lithium-ion battery. It is widely used in

portable electric tools, electric bicycles, Communication base station, electricVehicles etc .

LithiumLithiumLithium---ion Battery for Eion Battery for Eion Battery for E---BikeBikeBike

Number Item Specification Remarks

1 Rated Capacity/Ah 8

2 Nominal Voltage/V 25.9

3 Charge Cut-off Voltage/V ≤29.4

4 Discharge Cut-off Voltage/V ≥21.0

5 Charge Current/A ≤0.5C

6 Work Current/A 0.5C

7 Maximum Discharge Current/A 2C

8 Weight（Not Including Casing）/kg 1.8

9 Weight（Including Casing）/kg 2.3

10 Internal Resistance/ mΩ ≤50

11 Dimensions（Not Including Casing）/mm 245×85×60

12 Dimensions（Including Casing）/mm

13 Application Field EB

Cathode Material:LiMn2O4

LithiumLithiumLithium---ion Battery for Electric Motorcycleion Battery for Electric Motorcycleion Battery for Electric Motorcycle

Specification Remarks

48.1V20Ah 48.1V30Ah 48.1V40Ah

1 Rated Capacity/Ah 20 30 40

2 Nominal Voltage/V 48.1 48.1 48.1

3 Charge Cut-off Voltage/V ≤54.6 ≤54.6 ≤54.6

4 Discharge Cut-off Voltage/V ≥39.0 ≥39.0 ≥39.0

5 Charge Current/A ≤0.5C ≤0.5C ≤0.5C

6 Work Current/A 0.5C 0.5C 0.5C

7 Maximum Discharge Current/A 2C 2C 2C

8 Weight（Not Including Casing）/kg 7.6 11.5 15.2

9 Weight（Including Casing）/kg 9.5 13.5 17.3

10 Internal Resistance/ mΩ ≤50 ≤50 ≤50

11 Dimensions（Not Including Casing）/mm 245×150×120 245×150×170 245×150×240

12 Dimensions（Including Casing）/mm 275×160×165 275×160×215 275×160×285

13 Application Field EM EM EM


Number Item

LithiumLithiumLithium---ion Battery for Backup Power Source for Vehiclesion Battery for Backup Power Source for Vehiclesion Battery for Backup Power Source for Vehicles









8 Weight（Not Including Casing）/kg

9 Weight（Including Casing）/kg 32.6


11 Dimensions（Not Including Casing）/mm

12 Dimensions（Including Casing）/mm 430×195×350

13 Application Field Back UpPower Source


LithiumLithiumLithium---ion Battery for Backup Power Source for Vehiclesion Battery for Backup Power Source for Vehiclesion Battery for Backup Power Source for Vehicles










9 Weight（Including Casing）/kg 58




13 Application Field Back Up Power Source


LithiumLithiumLithium---ion Battery for Electric Vehiclesion Battery for Electric Vehiclesion Battery for Electric Vehicles














13 Application Field EV


Note：66.6V40Ah indicates one module. The module consists of 18PCS LiMn2O4 cells in series and one BMS（LECU，Local Electric Control System）. The whole EV&HEV power source consists of a number of modules in series or in parallel and BMS（CECU，C e n t r a l E l e c t r i c C o n t r o l S y s t e m ） .















13 Application Field EV

Cathode Material:LiFePO4

Note：38.4V100Ah indicates one module. The module consists of 12PCS LiFePO4 cells in series and one BMS（LECU，Local Electric Control System）. The whole EV&HEV power source consists of a number of modules in series or in parallel and BMS（CECU，C e n t r a l E l e c t r i c C o n t r o l S y s t e m ） .


SpecificationNumber Item

38.4V3000Ah 48V300Ah

1 Rated Capacity/Ah 300 300

2 Nominal Voltage/V 38.4 48

3 Charge Cut-off Voltage/V ≤45.6 ≤57.0

4 Discharge Cut-off Voltage/V ≥30.0 ≥37.5

5 Charge Current/A ≤0.5C ≤0.5C

6 Work Current/A 0.5C 0.5C

7 Maximum Discharge Current/A 2C 2C


9 Weight（Including Casing）/kg 195 235

10 Internal Resistance/ mΩ ≤50 ≤50


12 Dimensions（Including Casing）/mm 705×975×335 825×975×335

13 Application Field EV EV

Cathode Material:LiFePO4

Remarks


LithiumLithiumLithium---ion Battery for Electric Busion Battery for Electric Busion Battery for Electric Bus

ThatThatThat’’’s All!s All!s All!

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Date post:	19-Apr-2018
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