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How to speed up the Li-ion charging process and reduce heat dissipation?

Denny
As the preferred power supply for high-performance portable devices, Li-ion battery has many issues need our consideration, such as the charging speed and heat dissipation when charging. So how can we speed up the charging process and reduce the heat dissipation?

  • If I remember well, recently scientists in USA have invented a compound, which reduces the charging time of a Li-Ion battery by ten-fold. In other words, they invented a new content of the battery.

    I guess it will take some time till it becomes a product.

     

    Regarding the existing batteries, I would be careful. Lithium is capricious. It loves fire. Perhaps changing voltage, or charging frequency may speed the process up, and cool the battery. You need to experiment.
    Become a scientist.

  • I'd read "high performance device" as "short product lifetime".  Current Li-ion batteries do not have a consistant performance during their lifetime, and the change in temperature during charging means that you have to use a lot of intelligence in the charging system to detect when charging is finished. If you increase the charge rate, the conversion efficiency and the internal resistance would have to be significantly reduced otherwise you'd be looking at the charred remains of the battery. I wait to hear precisely what they have come up with, and how far they have changed the chemistry.

  • Having read the press release from Sony, I eagerly await to see if they have specifically solved the low cycle life and fast charging issues, they say they have. It sounds like the new electrode materials have done this, and possibly they will have the algorithums for charging controls available. We wait to see the products in action.

  • in reply to M0DCD
    how far they have changed the chemistry

    I do not quote any particular report. I write from memory of what I heard.

    I heard that their invention is not the "active" compound - the one which stores the power.

    Their invention is the filling - the virtual internal "wiring".

    This fillage facilitates passage of ions. It acts like a good lubricant.

    Otherwise the chemistry is not changed.

    The scientists, whom I mentioned, are in USA. Not at Sony apparently. Their development is new - just of the past summer (June-July, 2009). So, it had no time yet to reach any manufacturing company.