KPH series
KPH is intended for applications where there are requirements for relatively high voltage over short periods, usually less than 30 minutes.The program may have frequent or intermittent discharges.The voltage discharge range varies from 3.5C5 (A) to 7C5 (A).
Application:
-for railways - starting of locomotives,
-for mines - mining locomotives,
-for factories and institutions - starting diesel and electric generators ...
GENERAL INFORMATION, TERMS, DEFINITIONS
Accumulators-batteries for discharge from 3.5 C5 A to 7 C5 A type KPH
Features and benefits of Ni-Cd batteries
They are used as mobile and stationary batteries, mounted on portable boxes or on racks.
High resistance to mechanical loads.
High resistance to electric overcharging and deep discharge.
Minimal self-discharge.
Large number of charge and discharge cycles.
Operation in the temperature range from -40 to + 50 ° C.
There is a possibility of recycling the battery.
Quick and easy installation, easy maintenance and handling.
Low internal resistance.
The electrical characteristics of the battery are fully in accordance with the standard of the International Electrotechnical Commission IEC.
General data
IBG's open prismatic Ni-Cd batteries belong to the group of batteries with alkaline electrolyte.
The label "prismatic" tells us about the shape of the battery. According to the construction of the electrode, the battery belongs to the group of batteries with lamellar electrodes.
According to the convenience of the discharge mode, KPH type batteries belong to the group of batteries for discharge of currents 3.5-7 C5A.
Terms and definitions
The rated battery voltage (operating voltage) is 1.2 V.
In order to achieve the required higher voltage values of 1.2 V, the battery is regularly connected to the battery.
Nominal battery capacity is five hours capacity (C5).
The nominal capacity of the battery is 5-hour capacity (C5) at a temperature of 20 ± 5 ° C, expressed by the amount of electricity in ampere hours (Ah) and marked C5, Ah.
Normal (rated) charging and discharging current is: I = 0.2 C5 A.
Charging time with rated current is 7.5 - 8 hours, which ensures full charge.
The charge factor is: F = 150 – 160 % C5 Ah.
Rated current discharge time I= 0,2 C5A do 1,0 V/cell and lasts at least 5 hours.
The electrolyte in the battery is a solution of KOH (potassium hydroxide) in distilled water. Electrolyte density is1,2 ± 0,01 g/cm3.
CHARGING
Electrical characteristics of charging at temperature+20°C
Constant current charging
Charging current is: I = 0,2 C5A.
Charging time is7,5 – 8h.
Charging is also possible with currents from0,1do 0,5 C5A, but the charging time must meet the condition of full charge: F = 150 – 160% C5Ah.
Constant voltage charging (parallel connection to the consumer)
Recommended voltages for this type of charging range from 1.45 V to 1.55 V per battery.
The charging current at the end of charging (maintenance current) is about 0.04 C5 A.
Charging time is unlimited.
Charging according to "IU System"
The initial charging current is in the range of 0.1 to 0.5 C5A.
Constant current charging lasts up to a limit voltage of 1.50 V or 1.55 V per cell.
Continuation of charging at limited voltage with decreasing current lasts up to the value of the maintenance current: i = 0,04 C5A.
Charging time depends on the initial charging current.
Reinforced charging
Reinforced charging is applied before commissioning and after prolonged storage, or prolonged battery operation in difficult conditions.
The charging current is constant: I = 0,2 x C5A.
Charging time is from10 to 12 h.
The voltage per cell is initially1,35 V/cell, and finally1,75 V.
Increased charging can be repeated if the control detects a reduced battery capacity.
Maintenance replenishment
For longer storage and to maintain charge, the battery is recharged indefinitely: I = 0,5 do 2 mA/Ah.
The charging voltage is1,40 + 0,02 V/cell.
Recharge time is unlimited.
