<s>
Depth	B-Algorithm
of	I-Algorithm
discharge	I-Algorithm
(	O
DoD	O
)	O
is	O
an	O
important	O
parameter	O
appearing	O
in	O
the	O
context	O
of	O
rechargeable	B-Architecture
battery	I-Architecture
operation	O
.	O
</s>
<s>
The	O
depth	B-Algorithm
of	I-Algorithm
discharge	I-Algorithm
is	O
defined	O
as	O
:	O
</s>
<s>
"	O
Charged	O
"	O
does	O
not	O
necessarily	O
refer	O
to	O
fully	O
or	O
100%	O
charged	O
,	O
but	O
rather	O
to	O
the	O
state	B-Algorithm
of	I-Algorithm
charge	I-Algorithm
(	O
SoC	O
)	O
,	O
where	O
the	O
battery	B-Application
charger	I-Application
stops	O
charging	O
,	O
which	O
is	O
achieved	O
by	O
different	O
techniques	O
.	O
</s>
<s>
For	O
fully	O
charged	O
batteries	O
,	O
the	O
depth	B-Algorithm
of	I-Algorithm
discharge	I-Algorithm
is	O
connected	O
to	O
the	O
state	B-Algorithm
of	I-Algorithm
charge	I-Algorithm
by	O
the	O
simple	O
formula	O
.	O
</s>
<s>
The	O
depth	B-Algorithm
of	I-Algorithm
discharge	I-Algorithm
then	O
is	O
the	O
complement	O
of	O
state	B-Algorithm
of	I-Algorithm
charge	I-Algorithm
:	O
as	O
one	O
increases	O
,	O
the	O
other	O
decreases	O
.	O
</s>
<s>
The	O
depth	B-Algorithm
of	I-Algorithm
discharge	I-Algorithm
can	O
therefore	O
(	O
1	O
)	O
refer	O
to	O
the	O
size	O
of	O
the	O
range	O
usually	O
used	O
for	O
discharge	O
or	O
(	O
2	O
)	O
the	O
current	O
amount	O
of	O
charge	O
or	O
fraction	O
of	O
the	O
capacity	O
removed	O
from	O
the	O
battery	O
.	O
</s>
<s>
During	O
their	O
use	O
,	O
secondary	B-Architecture
batteries	I-Architecture
are	O
repeatedly	O
charged	O
and	O
discharged	O
within	O
a	O
certain	O
range	O
of	O
state	B-Algorithm
of	I-Algorithm
charge	I-Algorithm
.	O
</s>
<s>
For	O
many	O
battery	B-Algorithm
types	I-Algorithm
,	O
it	O
is	O
beneficial	O
or	O
even	O
mandatory	O
for	O
safety	O
reasons	O
,	O
to	O
not	O
encounter	O
overcharging	O
and/or	O
deep	O
discharge	O
.	O
</s>
<s>
To	O
prevent	O
adverse	O
effects	O
,	O
a	O
battery	B-Algorithm
management	I-Algorithm
system	I-Algorithm
or	O
battery	B-Application
charger	I-Application
may	O
keep	O
the	O
battery	O
from	O
extreme	O
levels	O
regarding	O
SoC	O
,	O
thereby	O
limiting	O
the	O
SoC	O
to	O
a	O
reduced	O
range	O
between	O
0%	O
and	O
100%	O
and	O
decreasing	O
depth	B-Algorithm
of	I-Algorithm
discharge	I-Algorithm
below	O
100%	O
(	O
see	O
example	O
below	O
)	O
.	O
</s>
<s>
For	O
almost	O
all	O
known	O
rechargeable	B-Architecture
battery	I-Architecture
technologies	O
,	O
such	O
as	O
lead-acid	B-Device
batteries	I-Device
of	O
all	O
kinds	O
like	O
AGM	O
,	O
there	O
is	O
a	O
correlation	O
between	O
the	O
depth	B-Algorithm
of	I-Algorithm
discharge	I-Algorithm
and	O
the	O
cycle	B-Algorithm
life	I-Algorithm
of	O
the	O
battery	O
.	O
</s>
<s>
For	O
batteries	O
,	O
for	O
example	O
,	O
the	O
state	B-Algorithm
of	I-Algorithm
charge	I-Algorithm
is	O
often	O
limited	O
to	O
the	O
range	O
between	O
15%	O
and	O
85%	O
to	O
greatly	O
increase	O
their	O
cycle	B-Algorithm
life	I-Algorithm
,	O
resulting	O
in	O
a	O
DoD	O
of	O
70%	O
.	O
</s>
<s>
While	O
the	O
state	B-Algorithm
of	I-Algorithm
charge	I-Algorithm
is	O
usually	O
expressed	O
using	O
percentage	O
points	O
(	O
0%	O
=	O
empty	O
;	O
100%	O
=	O
full	O
)	O
,	O
depth	B-Algorithm
of	I-Algorithm
discharge	I-Algorithm
is	O
either	O
expressed	O
using	O
units	O
of	O
Ah	O
(	O
e.g.	O
</s>
<s>
Thus	O
it	O
is	O
possible	O
for	O
the	O
depth	B-Algorithm
of	I-Algorithm
discharge	I-Algorithm
value	O
to	O
exceed	O
the	O
nominal	O
value	O
(	O
e.g.	O
,	O
55Ah	O
for	O
a	O
50Ah	O
battery	O
,	O
or	O
110%	O
)	O
.	O
</s>
<s>
Using	O
definition	O
(	O
2	O
)	O
,	O
the	O
depth	B-Algorithm
of	I-Algorithm
discharge	I-Algorithm
of	O
a	O
charged	O
90Ah	O
battery	O
is	O
discharged	O
for	O
20	O
minutes	O
at	O
a	O
constant	O
current	O
of	O
50A	O
is	O
calculated	O
by	O
:	O
</s>
