1 Advanced Technology Reliable Quality Customer Satisfaction Copyright © CALB All Rights Reserved. 2012

2 Advanced Technology Reliable Quality Customer Satisfaction Copyright © CALB All Rights Reserved Topics 1Structure of metal shell battery 2Application and maintenance of metal shell battery

3 Advanced Technology Reliable Quality Customer Satisfaction Copyright © CALB All Rights Reserved Metal shell upgrade: ① The shell is made of Aluminum. Much lighter, and better heat dissipation performance than plastic shell. ② The shell was shaped by entire Aluminum board. ③ The Aluminum shell covered by blue plastic film, to improve insulation performance. Notice: Do not tear off the blue plastic film. Separator Positive terminal Negative terminal  Structure of metal shell battery

4 Advanced Technology Reliable Quality Customer Satisfaction Copyright © CALB All Rights Reserved  Structure of metal shell battery Safety valve upgrade: ① The new safety valve is designed completely sealed. No air or liquid can pass through. ② This valve has two films. The lower film is Aluminum. It will be break to release the internal pressure. The upper file is plastic, it could block the dust and liquid to protect the Aluminum film. Notice: Do not break the film. If the Aluminum film was broken, it can not be restored, this battery was invalidation.

5 Advanced Technology Reliable Quality Customer Satisfaction Copyright © CALB All Rights Reserved  Structure of metal shell battery Terminals upgrade: ① The positive terminal is made of Aluminum, the negative terminal is made of Copper. ② We plate Tin on the surface of copper to protect the negative terminal from oxidize. ③ The ring around the screw thread is used for automatic packing bus bar. ④ We put a steel threaded sleeve inside the terminals to improve the strength.

6 Advanced Technology Reliable Quality Customer Satisfaction Copyright © CALB All Rights Reserved  Structure of metal shell battery Plastic protector: ① The plastic protector is only design for metal shell battery. ② Plastic protector is made of PP. ③ The advantage of plastic protector. Integration modular packing method available Improve the insulation performance Enhance the heat dissipation performance Convenient wiring Notice: This protector is standard parts.

7 Advanced Technology Reliable Quality Customer Satisfaction Copyright © CALB All Rights Reserved  Structure of metal shell battery Ceramic separator: ① New ceramic separator is used to improve safety. ② Advantage of ceramic separator. Increase the strength, anti-penetration, High temperature performance, anti- deformation in high temperature Reduce the thickness, better electrical conductivity ③ Applied in CA series and metal shell series High temperature test Separator without ceramic Shrink Ceramic Separator Less shrink

8 Advanced Technology Reliable Quality Customer Satisfaction Copyright © CALB All Rights Reserved NumItemsSpecifiactionPS 1capacity72AH 2Min capacity72AH 3voltage2.5 – 3.65V 4IR≤ 1mΩ30%SOC 5Charging time Standard ～ 4 小时 Fast ～ 1 小时 6SOC platform SOC ： 10% - 90% 7Working Temp. Charging 0 ～ 45 ℃ Discharge -20 ～ 55 ℃ 8Weight1.9 ± 0.1Kg 9ShellAl  Structure of metal shell battery Specification of CAM72

9 Advanced Technology Reliable Quality Customer Satisfaction Copyright © CALB All Rights Reserved  Application and maintenance of metal shell battery Charge ① The maximum charging voltage is 3.65V. ② The maximum continuous charging rate is 1C.

10 Advanced Technology Reliable Quality Customer Satisfaction Copyright © CALB All Rights Reserved  Application and maintenance of metal shell battery Discharge ① The maximum discharging voltage is 2.5V. ② The maximum continuous discharging rate is 2C.

11 Advanced Technology Reliable Quality Customer Satisfaction Copyright © CALB All Rights Reserved SOC10%20%30%40%50%60%70%80%90%100% OCV  Application and maintenance of metal shell battery OCV vs SOC: ① The self discharge rate is less than 3% per month. ② The relationship between SOC and OCV is shown on the right.

12 Advanced Technology Reliable Quality Customer Satisfaction Copyright © CALB All Rights Reserved  Application and maintenance of metal shell battery Maintenance: ① The temperature should be 20 – 25 ℃ for storage. This is much better for the cell. ② New cell is deliver with 30%SOC, please check the voltage per month to avoid over discharge. ③ Please cycle the cells every half year once.

13 Advanced Technology Reliable Quality Customer Satisfaction Copyright © CALB All Rights Reserved IR OCV Capacity Capacity  Application and maintenance of metal shell battery Packing standard: There are three important factors for CALB to packing cells. ① Make the capacity of each cell very close to each other. ② Make the OCV of cells close to each other. ③ The internal resistance of each cell less than 1mΩ

14 Advanced Technology Reliable Quality Customer Satisfaction Copyright © CALB All Rights Reserved  Application and maintenance of metal shell battery Metal shell battery module design: ① install the plastic protector ② assemble the battery unit ③ assemble the cabinet ④ Pack the battery units ⑤ Test the power system

15 Advanced Technology Reliable Quality Customer Satisfaction Copyright © CALB All Rights Reserved  Application and maintenance of metal shell battery Emergency measurement: over charge metal shell battery equipped with explosion-proof safety valve, when battery overcharge, internal pressure will open the safety valve, produced a lot of smoke, at this time, should take measures as follow: ① immediately shut off the power supply system and the charger. ② Put on gas mask or wet towel to prevent breathing smoke. ③ Evacuate all the people from the danger area to airy place. ④ Cooling the ESS with dry ice fire extinguisher or Alkaline metal fire extinguisher. ⑤ Contact customer service

16 Advanced Technology Reliable Quality Customer Satisfaction Copyright © CALB All Rights Reserved Short-time over discharge will cause a little capacity lost. Recover measures should be taken as follows: ① charge the cells to 3V, using 0.1C current. ② then increase the current to 0.3C. ③ stop charge until 3.65V. ④ repeated 3 cycles. Long-time over discharge may cause internal short, as shown on the right. Using the repair measures above to check the cells, if the voltage can not get back to 3V, this battery will not be restore by charging.  Application and maintenance of metal shell battery Emergency measurement: over discharge

17 Advanced Technology Reliable Quality Customer Satisfaction Copyright © CALB All Rights Reserved ISO 9001 GB/T19001 CEUN38.3ROHS2006/66/EC UL & TUV certificate are in progress. Test Reports & Certificates  Application and maintenance of metal shell battery

18 Advanced Technology Reliable Quality Customer Satisfaction Copyright © CALB All Rights Reserved Thanks ！ CALB Add. No.69,Binhe Road, High Tech Zone, Luoyang, Henan, China Tel Fax