<s>
A	O
smart	O
battery	O
or	O
a	O
smart	O
battery	B-Algorithm
pack	I-Algorithm
is	O
a	O
rechargeable	B-Architecture
battery	I-Architecture
pack	I-Algorithm
with	O
a	O
built-in	O
battery	B-Algorithm
management	I-Algorithm
system	I-Algorithm
(	O
BMS	O
)	O
,	O
usually	O
designed	O
for	O
use	O
in	O
a	O
portable	B-Device
computer	I-Device
such	O
as	O
a	O
laptop	B-Device
.	O
</s>
<s>
BMS	O
interface	O
examples	O
are	O
:	O
SMBus	B-Algorithm
,	O
PMBus	B-Algorithm
,	O
EIA-232	O
,	O
EIA-485	O
,	O
and	O
Local	O
Interconnect	B-General_Concept
Network	O
.	O
</s>
<s>
Externally	O
,	O
a	O
smart	O
battery	O
can	O
communicate	O
with	O
a	O
smart	B-Algorithm
battery	I-Algorithm
charger	I-Algorithm
and	O
a	O
"	O
smart	O
energy	O
user	O
"	O
via	O
the	O
bus	O
interface	O
.	O
</s>
<s>
There	O
are	O
standard	O
specifications	O
for	O
smart	O
batteries	O
:	O
Smart	B-Algorithm
Battery	I-Algorithm
System	I-Algorithm
,	O
and	O
many	O
ad-hoc	O
specifications	O
.	O
</s>
<s>
A	O
smart	B-Algorithm
battery	I-Algorithm
charger	I-Algorithm
is	O
mainly	O
a	O
switch	O
mode	O
power	O
supply	O
(	O
also	O
known	O
as	O
high	O
frequency	O
charger	O
)	O
that	O
has	O
the	O
ability	O
to	O
communicate	O
with	O
a	O
smart	O
battery	B-Algorithm
pack	I-Algorithm
's	O
battery	B-Algorithm
management	I-Algorithm
system	I-Algorithm
(	O
BMS	O
)	O
in	O
order	O
to	O
control	O
and	O
monitor	O
the	O
charging	O
process	O
.	O
</s>
<s>
This	O
communication	O
may	O
be	O
by	O
a	O
standard	O
bus	O
such	O
as	O
CAN	B-Protocol
bus	I-Protocol
in	O
automobiles	O
or	O
System	B-Algorithm
Management	I-Algorithm
Bus	I-Algorithm
(	O
SMBus	B-Algorithm
)	O
in	O
computers	O
.	O
</s>
<s>
Besides	O
the	O
usual	O
plus	O
(	O
positive	O
)	O
and	O
minus	O
(	O
negative	O
)	O
terminals	O
,	O
a	O
smart	B-Algorithm
battery	I-Algorithm
charger	I-Algorithm
also	O
has	O
multiple	O
terminals	O
to	O
connect	O
to	O
the	O
smart	O
battery	B-Algorithm
pack	I-Algorithm
's	O
BMS	O
.	O
</s>
<s>
The	O
Smart	B-Algorithm
Battery	I-Algorithm
System	I-Algorithm
standard	O
is	O
commonly	O
used	O
to	O
define	O
this	O
connection	O
,	O
which	O
includes	O
the	O
data	B-General_Concept
bus	I-General_Concept
and	O
the	O
communications	O
protocol	O
between	O
the	O
charger	O
and	O
battery	O
.	O
</s>
<s>
Microchip	O
Technology	O
provides	O
an	O
application	O
note	O
for	O
a	O
smart	B-Algorithm
battery	I-Algorithm
charger	I-Algorithm
based	O
on	O
the	O
PIC16C73	O
.	O
</s>
