Poly battery when the lowest price in recent years, the official website of China's investment in infrastructure continues to increase, the railway construction is one of the key infrastructure. Sealed lead-acid batteries in the railway locomotives are used mainly as starting power, is now the old-fashioned anti-acid battery replacement for proof sealed lead-acid batteries, the current demand for batteries with a great railroad. Poly battery when detailed product performance parameters: discharge (1) battery should not be discharged below a predetermined termination voltage, otherwise it will lead to over-discharge, and repeated over-discharge will result in capacity is difficult to recover, in order to achieve the best efficiency, discharge between should 0.05-3C, discharge voltage as shown in Table 1 (Table 1) the discharge current and discharge voltage and discharge current (A) the discharge termination voltage (V / monomers) (A) <0.1C 1.90 (A) < 0.2C 1.80 0.2C <(A) <0.5C 1.70 0.5 <(A) <1.0C 1.60 1C <(A) <2C 1.50 3C <(A) 1.30 (2) the relationship between the discharge capacity ◆ discharge capacity and discharge current, Figure 1 is FM, JFM series battery at different discharge rates conditions discharged capacity, can be seen from the figure, the larger the discharge rate, the smaller the battery capacity that can be discharged. ◆ Temperature affects the role of the battery capacity is subject temperature, low temperature (below 15 ℃, 5 ℉.) Will reduce the effective capacity, high temperatures (above 122 ℉ .50 ℃) will lead to thermal runaway and damage the battery Charging (1) float (limit voltage controlled current) use: float voltage 2.25V ~ 2.30V / monomer, shall not exceed the maximum current 0.25C10, battery float adjusted current less than 2mA /AH.(25℃) . Refer to Table (2). (Table 2) charging method and charging time charging method Charging time (h) the ambient temperature (℃) 6-125-35 constant voltage charging charging 6-12 (2) recycling (ie, stop charging, put the electricity that charge): charging voltage 2.4 V / monomer, the maximum charging current is not greater than 0.25C10 (3) battery temperature compensation in the range of 5 ~ 35 ℃, do not have to be compensated charging voltage, when the temperature is below 5 ℃ or higher. When at 35 ℃, recommended charging voltage to make appropriate adjustments, to adjust the standard floating dry 3mv / ℃ / monomer, when dry recycled 4mv / ℃ / monomer (temperature 25 ℃ as reference). (3) overcharge the battery is fully charged and then charge it is called over-charging, over-charging will shorten the duration of battery life. In recent years, the life of our investment in infrastructure continues to increase, the railway construction is one of the key infrastructure. Sealed lead-acid batteries in the railway locomotives are used mainly as starting power, is now the old-fashioned anti-acid battery replacement for proof sealed lead-acid batteries, the current demand for batteries with a great railroad.