IO-Power Technology Co., Ltd
1F,No.100, Jinzhu Rd., North Dist., Hsinchu City 30053, Taiwan
勁電科技有限公司 台灣 新竹市北區金竹路 100 號 1 樓 Tel: +886-3-5429395 Fax: +886-3-5357297
http://www.io-power.com.tw
www.io-power.com.cn
e-mail:
Form No.：IOP-DOC-011-001 15 / 22 Retention Period：6Y
Note3: When designing the battery capacity for Solar-Energy DC UPS Power System, the designer
needs to think about 1. How many rainy days in a series; 2. How many rainy days can the solar
power system support the load devices in a series; 3. How long can the battery be fully charged..etc.
To solve the continuous rainy or cloudy days, the designer may add another 20% or 30% of the
battery capacity. The added capacity may not be charged in one day, but once the sun shows up in
the next day, the battery can still be fully charged.
Consideration for environmental characteristics
(for C-LiFePO4 Lithium Batteries)
Battery service life and service efficiency is influenced obviously by the factors below. Please take
the factors in consideration:
1.
Operating temperature: Lowest temperature shall be higher than -20°C, and highest
temperature shall be lower than 60°C.
2.
Discharge depth: Usually, the definition of full-charged battery state is at 95% capacity, @13.3V.
When its voltage is @11V, the power capacity is about 2.13% left. Long-Term discharging
deeply will speed up aging the batteries. Therefore, we suggest discharging 70%, and keeping
30% left, @ about 13V. It will obviously extend the battery service life.
3.
The charging and discharging current: The recommended charging current should be less than
0.5C. And the recommended discharging current should be less than 0.2C. It will fully show the
battery charging/discharging characteristics and performance. It can also extend the battery
service life and slow down the battery aging.
4.
Regularly re-charge the power: the self-discharging rate of C-LiFePO4 Lithium Batteries is
much less than other batteries. Remaining in high voltage can extend battery service life and
slow down battery aging.
