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10

This manual only covers Constant voltage (CV) charging 
because CV charging is the preferred method. Every 
effort should be made to charge Hawker® VRLA AGM 
batteries with constant voltage. If constant current 
charging is the only available option, please contact 
EnerSys Technical Support for guidance. 

Charging should be performed in the battery work 
shop where the ambient temperature is maintained 
between 20ºC and 30ºC. The battery/re-blocking kit 
can be charged outside this temperature window if a 
temperature compensated charger is used.

Charge the battery / re-blocking kit at a constant voltage 
of 29.0 volts for an assembled 24V battery or 14.5 volts 
for individual monoblocs with a charger capable of 
delivering a minimum of 10 amps. Charge time depends 
on the rated capacity of the battery and the maximum 
current available from the charger.

The higher the available current the faster the battery will 
recharge, typical duration values are shown in Figure 4.

Figure 4 - Constant Potential Charging Times

9.

  CHARGING PROCEDURE

10.

   ROUTINE MAINTENANCE

  (Refer to Battery Maintenance Flowchart Appendix C)

10.1  

Visually inspect the 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 is securely fitted prior to charging.

10.2  

Measure and record the OCV using a calibrated  digital multi-meter.

10.2.1  

If the OCV measures greater than 25.5 volts, test the battery in the “as found” condition and continue 

 

  with step 10.3.

10.2.2  

If the OCV measures greater than 20.0 volts but less than 25.5 volts, charge the battery per Section 

 

  9.0 and continue with step 10.3.

10.2.3  

If the OCV measures 20.0 volts or less refer to deep discharge decovery document number 9602-6298 

 

   (which is available from EnerSys Technical Support), as the battery is considered to be in a deeply 

discharged state.

10.3  

Perform a capacity test per Section 12.

10.3.1  

If the result of the capacity test is greater than 80% (48 minutes), continue with step 10.4.

10.3.2  

If the result of the capacity test is 80% or less, recharge battery per section 9.

10.3.2.1  

Repeat the capacity test as per section 12.

10.3.2.1.1  

If the battery fails to make 80% capacity after two (2) capacity tests reject the battery per Section 13.

Battery Capacity

Charge Duration (hours)

@ 10 A

@ 20 A

@ 30 A

18 ampere-hour

4

3

2

25 ampere-hour

6

5

4

37 ampere-hour

8

7

6

40 ampere-hour

8

7

6

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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