B
Bret Cahill
Guest
Some start ups are making claims that their battery is superior in
every aspect, i. e., cost, energy density, efficiency, etc., to every
other battery. From pacemakers to load leveling power plants their
technology will not only dominate the market but effectively eliminate
all other technology.
We can always be hopeful but these claims might not pan out, and, like
heat engines, a variety of situations will result in a variety of
solutions.
For example, the cost of power from a grid + battery situation like
EVs or "off the grid" or off peak solar/wind homes is 2/3rds battery
using the life time cycling cost of a battery. Trying to cut that
cost by increasing the efficiency by 10% while allowing the cost of
the battery to rise 20% won't be nearly as effective as cutting the
cost of the battery by half and taking a 20% hit in efficiency. Grid
+ battery situations could still be cost effective with an inefficient
battery if it was cheap enough as far as the lifetime number of
cycles.
In contrast, the cost of ICE + battery ( hybrids run entirely on fuel
is much less than 2/5ths battery and the situation is reversed.
Trying to cut that cost by cutting battery cost isn't going to be
nearly as effective as increasing efficiency.
In an ICE + battery situation true economy requires spending a lot of
money for a somewhat more efficient battery.
Another example is EVs require high energy density batteries. For an
off grid or off peak home neither energy nor power density are
significant factors. A battery wouldn't fill an apt. closet.
Therefor it would be cost effective to consider lower energy density
as well as lower efficiency in order to get a cheap battery/cycling
ratio.
The point is to cast as big a net as possible to get as many different
batteries as possible.
Bret Cahill
every aspect, i. e., cost, energy density, efficiency, etc., to every
other battery. From pacemakers to load leveling power plants their
technology will not only dominate the market but effectively eliminate
all other technology.
We can always be hopeful but these claims might not pan out, and, like
heat engines, a variety of situations will result in a variety of
solutions.
For example, the cost of power from a grid + battery situation like
EVs or "off the grid" or off peak solar/wind homes is 2/3rds battery
using the life time cycling cost of a battery. Trying to cut that
cost by increasing the efficiency by 10% while allowing the cost of
the battery to rise 20% won't be nearly as effective as cutting the
cost of the battery by half and taking a 20% hit in efficiency. Grid
+ battery situations could still be cost effective with an inefficient
battery if it was cheap enough as far as the lifetime number of
cycles.
In contrast, the cost of ICE + battery ( hybrids run entirely on fuel
is much less than 2/5ths battery and the situation is reversed.
Trying to cut that cost by cutting battery cost isn't going to be
nearly as effective as increasing efficiency.
In an ICE + battery situation true economy requires spending a lot of
money for a somewhat more efficient battery.
Another example is EVs require high energy density batteries. For an
off grid or off peak home neither energy nor power density are
significant factors. A battery wouldn't fill an apt. closet.
Therefor it would be cost effective to consider lower energy density
as well as lower efficiency in order to get a cheap battery/cycling
ratio.
The point is to cast as big a net as possible to get as many different
batteries as possible.
Bret Cahill