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Topic Title: 787 Dreamliner Batteries
Topic Summary: Seeking references describing lithium ion cells, batteries, and cell balancing circuits
Created On: 31 January 2013 05:54 PM
Status: Read Only
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 31 January 2013 05:54 PM
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Joined: 31 January 2013

Neither Boeing, nor their battery supplier Yuasa, understand the proper care and feeding of a series connection of eight lithium ion cells. If either of them understood the problem, then this very expensive situation would not exist. It is time for engineers, not in the loop, to kibitz. Can any one give me good reference sources for the volt-ampere charge and discharge curves, with temperature as a parameter, for this chemistry?
Does anyone, independent of direct involvement, know if the system instruments individual cell voltages, or corrects cell-to-cell imbalances, in any way?
 05 February 2013 12:25 PM
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Joined: 06 November 2001

I believe that the manufacturers of batteries for electric cars have developed electronics to monitor and manage the stack of cells to optimise the recharging process for each individual cell in the stack such that charging of each cell ceases once it is optimally charged.


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