Technology and Operations  
This forum is for discussing technological & operational matters pertaining to U-boats. 
Go to: Forum List•Message List•New Topic•Search•Log In•Print View
Re: re charging batteries
Posted by: SnakeDoc ()
Date: May 11, 2013 12:41PM

Hi,

the standard charging procedure was charging with constant current of value 1650 A, till the cell voltage achieve 2,4 V. Then the current was gradually reduced (in about hour) to 415 A (to maintain constant voltage). Then charging was completed.
I know, that starting from 2,2 V per cell to the end of charing took about 3,5 h. By extrapolating this data down to maximum discharge voltage (~1,8 V per cell), I would say, that charging of the depleted battery would take about 8 hours with maximum current 1650 A (that means running single generator at 450 RPM).
There was "fast charging" option possible - by doubling the current, which shortened charging time by about 1/3.

--
Regards
Maciek


[www.tvre.org]

Options: Reply•Quote


Subject Written By Posted
re charging batteries laboe 05/10/2013 08:58PM
Re: re charging batteries BHenderson 05/11/2013 08:50AM
Re: re charging batteries laboe 05/11/2013 11:46AM
Re: re charging batteries BHenderson 05/12/2013 03:41AM
Re: re charging batteries SnakeDoc 05/12/2013 09:21AM
Re: re charging batteries SnakeDoc 05/12/2013 12:55PM
Re: re charging batteries SnakeDoc 05/11/2013 12:41PM
Re: re charging batteries laboe 05/11/2013 02:12PM
Re: re charging batteries SnakeDoc 05/11/2013 02:28PM
Re: re charging batteries laboe 05/11/2013 04:03PM


Go to: Forum List•Message List•Search•Log In
Your Name: 
Your Email: 
Subject: 
Spam prevention:
Please, enter the code that you see below in the input field. This is for blocking bots that try to post this form automatically.
 **      **  **     **  ********  ********         ** 
 **  **  **  **     **  **        **     **        ** 
 **  **  **  **     **  **        **     **        ** 
 **  **  **  **     **  ******    ********         ** 
 **  **  **  **     **  **        **     **  **    ** 
 **  **  **  **     **  **        **     **  **    ** 
  ***  ***    *******   ********  ********    ******