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7

5.3   

STATE OF CHARGE

The open circuit voltage of the battery prior to service can be used as an approximate guide to the state of charge of 
the battery. Figure 3 shows the relationship between open-circuit voltage and the state of charge of a new battery after 
24 hours or more after recharge.

Note!

 

That state of charge is not the same as available capacity. A battery at end-of-life and fully charged will show  

an OCV of 26.0V approximately but have an available capacity of 80% of rated capacity.

6.

 STORAGE

The battery/re-blocking kit should be stored, fully 
charged, in a cool dry place, ideally below 25°C. The 
battery/re- blocking kit charge retention will be reduced 
and possible performance degradation will occur if it is 
subjected to long-term exposure well in excess of this 
temperature. 

The battery/re- blocking kit has a maximum inspection-
free storage life of two (2) years, if stored at or below 
20°C, after which a boost charge should be administered 
in accordance with paragraph 9. However, it is advisable 
to conduct an inspection and open circuit voltage check 
after 12 months and top-up charge in accordance with 
paragraph 9 if necessary.

The battery/re-blocking kit may be stored up to five (5) 
years without degradation of performance provided that 
an inspection and open circuit voltage check is conducted 
every 12 months. When stored in temperatures in excess 
of 25°C the battery/re-blocking kit should be inspected 
every 6 months, and top-up charged in accordance with 
paragraph 9 should the open circuit voltage fall below 
25.5 volts for an assembled battery or 12.75 volts for 
individual monoblocs. 

Should the battery be returned to storage following in 
service use, it must be fully recharged in accordance 
with paragraph 9 and if possible packed in original 
packaging.

Figure 3 - Open circuit voltage as a function of state of charge

23.6 

23.8 

24.0 

24.2 

24.4 

24.6 

24.8 

25.0 

25.2 

25.4 

25.6 

25.8 

26.0 

10 

20 

30 

40 

50 

60 

70 

80 

90 

100 

110 

Open Circuit 

Voltage (OCV), V 

 State of Charge (SOC), % 

Open Circuit Voltage (OCV) as a Function of State of Charge (SOC)

for 24 Volt Aviation Batteries  

Содержание HAWKER 9250-0083

Страница 1: ...AEROSPACE Sealed Lead Acid Batteries Aircraft Battery Maintenance Manual UK Sealed Lead Acid Batteries Aircraft Battery Maintenance Manual UK...

Страница 2: ...TANT Please read this manual immediately on receipt of the battery ies before unpacking and installing Failure to comply with these instructions will render any warranties null and void to the extent...

Страница 3: ...SPECTION 9 8 2 VOLTAGE CHECKS 9 9 CHARGING PROCEDURE 10 10 ROUTINE MAINTENANCE 10 11 SERVICE PERIOD 11 12 CAPACITY TEST 11 13 REJECTION PROCEDURE 12 14 DEEP DISCHARGE RECOVERY 12 15 UNSCHEDULED REMOVA...

Страница 4: ...id distilled water or alkali to the battery The Hawker 24 volt aircraft battery covered by this maintenance manual consist of two 12 volt valve regulated monoblocs connected in series enclosed in a po...

Страница 5: ...ately Clothing contaminated by acid should be washed in water Electrolyte is highly corrosive In the normal operation of this battery contact with acid isn t possible If the cell containers are damage...

Страница 6: ...ampere discharge for 1 hour down to a battery voltage of 20 volts By conventional definition the battery is deemed airworthy if it delivers its rated capacity for 48 minutes down to a voltage of 20 vo...

Страница 7: ...administered in accordance with paragraph 9 However it is advisable to conduct an inspection and open circuit voltage check after 12 months and top up charge in accordance with paragraph 9 if necessar...

Страница 8: ...rity Nominal battery voltage and number of cells Rated capacity Safety instructions where applicable Warning Short circuit currents will exceed 2000 amps all tools must be insulated Care must be taken...

Страница 9: ...ttery can be issued for service 8 2 4 If the OCV is equal to or less than 25 3 volts but greater than 20 0 volts the battery needs to be charged 8 2 4 1 Charge the battery in accordance with paragraph...

Страница 10: ...he exterior of the battery casing for signs of damage and cracks Examine the battery terminal for signs of damage corrosion and water dirt ingress clean as necessary Always ensure that the battery lid...

Страница 11: ...one hour rate and measuring the time required in minutes to reach the cut off voltage Discharge the battery at the appropriate constant current value found in Figure 5 at 20 2 C to an end voltage of 2...

Страница 12: ...y in accordance with paragraph 9 and notify EnerSys or your distributor of failure If the battery has an OCV of less than 20 volts it is considered to have been abused Over discharging the battery to...

Страница 13: ...lass 8 Proper Shipping Name BATTERIES WET NON SPILLABLE electric storage Packing Group ADR not assigned Label required Corrosive ADR RID New and spent batteries are exempt from all ADR RID special pro...

Страница 14: ...ashers and metal strip laminations from the rear monobloc terminals e Remove and discard the nuts and washers from the front terminals and lift off the laminations Note Do not remove the front laminat...

Страница 15: ...ne maintenance or unscheduled maintenance vii Date of battery returned to storage viii Date of any failures ix Date of any returns to manufacturer x OCV prior to any discharge Dispose of the battery i...

Страница 16: ...V Elcon None 38 0 9750E0640 9750E0654 25Ah 24V Elcon None 27 0 9750E0645 25Ah 24V Elcon 1 27 0 9750E0647 9750E0652 25Ah 24V Elcon 1 27 0 9750E0650 25Ah 24V Spade None 27 0 9750E0658 25Ah 24V Canon 1 2...

Страница 17: ...e as per paragraph 13 0 Issue Battery Reject battery Charge battery as per paragraph 9 0 Charge battery as per paragraph 9 0 Charge battery as per paragraph 9 0 25 5 Volts 25 3 25 5 Volts 25 3 Volts 2...

Страница 18: ...attery as per paragraph 9 0 48 minutes Second time 48 minutes First time 48 minutes Capacity test as per paragraph 12 0 Stand for 4 hours Follow Rejection procedure as per paragraph 13 0 Reject batter...

Страница 19: ...19 Intentionally Left Blank...

Страница 20: ...n support your requirements through our vast network of approved maintenance distributors EnerSys EMEA EnerSys EMEA EH Europe GmbH EH Europe GmbH L wenstrasse 32 L wenstrasse 32 8001 Z rich 8001 Z ric...

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