what's the frequency of the letter "i" in:
when there is two sets of batteries in the whole station, a set of runs, another set of exits running full-core relay. discharge i10 constant current, when the battery pack voltage drops to 1.8v × n, stop discharge. after (1 ~ 2) h, constant current limit charging – constant voltage charging – floating charge is used again with i10 current. repeated (2 ~ 3) times, the battery capacity can be recovered. if the battery pack has a total of 80 ℅ or more, the battery pack is less than 80 ℅ or more, and the replacement should be arranged.
(3) the counter-storage battery of the standby shelves is completed every 3 months.
5, the floating charge voltage value of the valve control battery should be corrected with the ambient temperature, the reference temperature is 25 ° c, the correction value is ± 1 ° c 3mv, that is, the temperature is 1 ° c per liter, the monomer voltage is 2v controlling battery floating charge voltage value should be reduced by 3mv, and vice versa should be increased by 3mv; the operating temperature of the valve-controlled battery should be maintained at 5 to 30 ° c, and the maximum should not exceed 35 ° c.
user
I found 41 "i"s in the provided passage.
assistant