2 vagm technique specification

2VAGM Technique Specification

2VAGM Technique specification

ZTE Confidential Proprietary © 2009 ZTE Corporation. All rights reserved. I

Product Type Technical Description

Version Date Author Approved By Remarks

V1.00 2009-11-12 Liu Yong Hu Jian Not open to the Third Party

© 2009 ZTE Corporation. All rights reserved.

ZTE CONFIDENTIAL: This document contains proprietary information of ZTE and is not to be disclosed or used without the prior written permission of ZTE.

Due to update and improvement of ZTE products and technologies, information in this document is subjected to change without notice.


II © 2009 ZTE Corporation. All rights reserved. ZTE Confidential Proprietary

TABLE OF CONTENTS

1 Battery Model, Technical Parameters Table ............................................................ 1

2 Technical Features of 2V AGM Battery .................................................................... 1 2.1 Operating Principle ...................................................................................................... 1 2.1.1 Chemistry Reaction during Charge and Discharge ..................................................... 1 2.1.2 Chemistry Reaction of the Final Charging Stage ........................................................ 2 2.2 Charging Characteristics ............................................................................................. 3 2.3 Discharging Characteristics ......................................................................................... 4 2.4 Life ............................................................................................................................... 6 2.5 Certification .................................................................................................................. 7


ZTE Confidential Proprietary © 2009 ZTE Corporation. All rights reserved. III

FIGURES

Figure 1 Curves between charge voltage, current, volume and time at different discharge depth .............................................................................................................................. 3

Figure 2 Discharging characteristics curves in different discharge rate at 20℃ .......................... 4 Figure 3 Relationship curve between capacity and temperature ................................................. 5 Figure 4 Relationship curves between remaining capacity and temperature .............................. 5 Figure 5 Relationship curve between OCV and discharge depth ................................................ 6 Figure 6 Fig.2-6 Relationship curve between float service life and temperature ......................... 6

TABLES

Table 1 Storage time, recharging voltage, current and time ....................................................... 4


ZTE Confidential Proprietary © 2009 ZTE Corporation. All rights reserved. 1

1 Battery Model, Technical Parameters Table

Model Rated Voltage

Rated Capacity

C10, 25℃,

Terminal Voltage1.8V Dimension(mm)

Weight (Kg) C10, 25℃,

1.8V Current(A)

Capacity(Ah)

Length Width Height Total Height

2V200AH 2 200 20 200 170~181 90~ 110 328~346 350~365 13~13.2

2V300AH 2 300 30 300 170~181 124~150 328~346 350~365 18.3~19

2V400AH 2 400 40 400 181~210 158~175 330~346 350~365 24~26.5

2V500AH 2 500 50 500 191~240 175~181 330~346 350~365 29.2~30

2V600AH 2 600 60 600 225~300 175~181 330~346 350~365 35~35.8

2V800AH 2 800 80 800 303~410 175~181 330~346 351~365 48~51

2V1000H 2 1000 100 1000 370~475 175~181 328~346 350~365 58.7~59

2V1600H 2 1600 160 1600 363~403 318~354 339~369 349~388 98~98.8

2V2000H 2 2000 200 2000 385~490 350~363 339~369 349~388 120~123

2V3000H 2 3000 300 3000 568~709 350~363 337~369 349~388 180~181

2 Technical Features of 2V AGM Battery

2.1 Operating Principle

2.1.1 Chemistry Reaction during Charge and Discharge

The chemistry reaction during charge and discharge of sealed VRLA batteries is as follows:

Negative reaction:

Pb+HSO-4 PbSO4+H +2e

discharge

charge

Positive reaction:

PbO2+3H +HSO-4+2e

discharge

chargePbSO4+2H2O


2 © 2009 ZTE Corporation. All rights reserved. ZTE Confidential Proprietary

Battery reaction:

Pb+PbO2+2H +2HSO-4

discharge

charge2PbSO4+2H2O

We can get conclusion from the above reactions:

Discharging: PbO2 in positive plate reacts with sponginess Pb in negative plates and H2SO4 in electrolyte. This reaction generates PbSO4, and the density of H2SO4 decreased.

Charging: PbSO4 is deoxidized to PbO2 and Pb. The density of H2SO4 increased.

2.1.2 Chemistry Reaction of the Final Charging Stage

1 At the end of charging, the voltage of battery is up to a certain value, and the positive pole will give off O2, because of dissolution of water. The reaction is:

2 The generated O2 is transferred to the negative pole through the separators, and then reacts with Pb.

3 PbO is alkalescence oxide, which reacts with H2SO4 immediately and generates PbSO4.

4 PbSO4 is transformed into sponginess Pb via charging.

5 The reaction at the negative plate is:

During charging, the water wasted on positive plate will be supplemented by the water produced on negative plate, so there is no need to add water, which makes battery easy to be maintained.



2.2 Charging Characteristics

Float and equalization charging range:

Float charging: (2.23~2.27)V/cell

Equalization charging: (2.30~2.35)V/cell

Maximum charging current:

Float charging: 0.20C10 A

Equalization charging: 0.20C10 A

Charging characteristics curves:

Charging characteristics curves of 2V AGM battery at different discharge depth:

Figure 1 Curves between charge voltage, current, volume and time at different discharge depth

Charging temperature compensation:

When the temperature is over 25℃, the float or equalization charging voltage will decrease 3mV when the temperature goes up by 1℃, and the float or equalization charging voltage will increase 3mV when the temperature goes down by 1℃.

Storage time, recharging voltage, current, time table:



Table 1 Storage time, recharging voltage, current and time

Storage Time (Month)

Recharging Voltage(V) Recharging Current(A)

Recharging Time(h)

Remarks

1 2.30 0.1C10 1~10h, the exact time according to the condition of exiting equalizing charge, the battery storage time is generally no more than 6months

3 2.30 0.1C10

6 2.30 0.1C10

9 2.30 0.1C10

12 2.30 0.1C10

2.3 Discharging Characteristics

Rated capacity: Under condition of ambient temperature 25℃, discharging with I10

until the terminal voltage is down to 1.8V, the discharging capacity is rated capacity.

Discharging characteristics curves: The discharge curves of 2V AGM battery at different discharge rate are shown in Figure2.

Figure 2 Discharging characteristics curves in different discharge rate at 20℃

Relationship curve between discharging capacity and temperature:



Figure 3 Relationship curve between capacity and temperature

The general principle is: at the condition of 25℃, AGM battery’s effective capacity would decrease 8% when the temperature drops per 10℃. Therefore, it is necessary to consider the influence incurred by the temperature of working condition when calculating the effective capacity.

Self-discharge characteristics: The capacity could remain above 90% after storage

3 months at 25℃.

Relationship curves between remaining capacity and temperature:

Figure 4 Relationship curves between remaining capacity and temperature



Relationship curve between open circuit voltage and discharge depth:

Figure 5 Relationship curve between OCV and discharge depth

2.4 Life

Designed cycle life of battery: 15years

Float charging usage life of battery: 10years

Relationship curve between battery float charging usage life and temperature:

Figure 6 Fig.2-6 Relationship curve between float service life and temperature



2.5 Certification

ISO9001-2000, ISO14001 Certification

TLC Certificate

UL Certification

CE Certification

2 vagm technique specification

Technology