Likbez - Batteries. Practices.

               From practice

KSA-7G


   I just took off curves of the charge / discharge
battery, but the information somewhere
zateryalas.Ya did it at different currents, and
so you can say about a very high efficiency
Lithium, with almost no losses on the small currents.
Maybe the best that the article was published tighten
nulsya - I had more experience.

   Some modern phones
(Though now outdated - MOTOROLA C330) conditions
stalled the batteries without protection scheme.
They are usually more compact and easier to mind
They depart from thin wire with mini connector
emom.Takie set not just by a
dnyuyu telephone cover and inside - under the hood
(To an ordinary consumer is not reached), and
secure the cover screws (designed to replace
Service Center). Possibly under the hood
and the sensor is, for the control of
battery.

   Built-in control circuit / protection
differ threshold, as well as
logic. Interestingly, the majority of schemes
thresholds are set to "round" levels (2.4,
2.3, 4, 4.3, 4.4, 2.5, and others - volts), and
on them, even the tester can be calibrated at
measurements at low currents (tens of mA). There
differences, but rarely. Thresholds are kept
very stable, measure the differential
ing scheme in Polevikov (judging by the fact that
energy management scheme is not consumed,
even near the thresholds). Control exclude
flax trigger (switching), the rate
is very high, but the response to relieve
limited (a fraction of a second after dos
tizheniya threshold) capacity. True, the budget
and even some cheap container may not
not byt.Polevye bidirectional switches are
quality. Low threshold for unlocking and
very low operating soprotivlenie.Po
you would think that the fall mainly on
key, but really just on the accumulator
oscillator, and the key there is almost no sweat poter.I
pu on a tin strip welded to the Comte
cta battery, slightly less than
way!

   Blunder - rely on
internal protection circuitry and external hem
tions the power source to charge directly!
Power Dissipation key because of its mini-
atyurizatsii - small and often avtokommutatsiya
in charge of a powerful source model
Jette ruin and key, and (then) battery
and possibly the source. With the load easier
but it seems situatsiya.V any case, large
continuous current - amps - and short
powerful pulses damage the battery,
degrading its svoystva.I so tough eq
spluatatsiya, some not quite serviceable
sotikah and improper charging may Snee
to reap its lifetime. Feel
lnost to overcurrent is due
sensitivity to the environment peregrevu.Vnutri
polarization of any heating due to losses of
noticeably affect the state, because the take
Heat nowhere, a lightweight body (thin con
dyaschie plate) warms up quickly.

   Ion batteries can not be the totally
Tew discharge, unlike other batteries
and аккумуляторов.Нелинейность and dependence
characteristics of the charge density will cause
La manufacturers to provide protection against
Recycle and overdischarge, although internal
resistance with little change. But
its increasing importance, with a powerful current in
beginning of charge, can gradually destroy the
battery. Therefore, the ideal charge ak
kumulyator average current - a 5-hour mode
at a voltage on it from 3.5, while
lower value of the EMF using a small
shoy talk - better in proportion to increasing
schy and less than 100 mA. At the end of charge current
also should be reduced to 100 mA to a
graze more energy. Indeed, because of losses
EDS is less than the cut-off, but
reduce the current below 20 mA is also pointless
because of possible leaks and tightening of
zaryada.Kstati process, leakage may not be
(Not worn battery, high quality)
and then it really can be charged
to the cut-off. But because of the shallow character
characteristics of charge time to turn off
may vary!

   Here are some "specific" measurements, in
are all more or less rounded, and
results in V, mA, m (minutes), mAh, J.

   For the convenience of recounts, in spite of the pa
znye measurement principles (in various situations
s), first is the absolute time
take measurements, then measured voltage
(Prosazheno load), then specify the integral
tear of time until the next measurement (line
below), the average current during this interval (if
not generalized), and then charge at the interval and
amount of energy during this interval. So
way, you can choose from a number of measurements ka
Coy or time period or range of
changes the voltage / current and count on
how much for it changed the charge and energy
energy, summing the last column in you
Brann range of measurements.



     (Continued in next article)