charging state.
The battery voltage is
greater than 58.4 V.
Cells are not consistent. The
capacity of some cells
deteriorates too fast or the
internal resistance of some
cells is too high.
recovered due to
protection against
abnormality
contact local
engineers to
rectify the fault.
The battery voltage is
less than 40V.
The minimum cell
voltage is less than
2.5V
The mains power failure has
lasted for a long time.
Cells are not consistent. The
capacity of some cells
deteriorates too fast or the
internal resistance of some
cells is too high.
Charge or dis-
charge high
temperature
protection
The maximum cell
temperature is greater
than 60
◦
C
The battery ambient
temperature is too high.
There are abnormal heat
sources around
Charge low
temperature
protection
The minimum cell
temperature is less
than 0
◦
C
The battery ambient
temperature is too low.
Discharge low
temperature
protection
The minimum cell
temperature is less
than
-20
◦
C
The battery ambient
temperature is too low.
By checking the above data and sending the data to the service personnel of our company,
the service personnel of our company will reply the corresponding solution after receiving
the data.
8 Battery recovery
Aluminum, copper, lithium, iron, and other metal materials are recovered from discarded
LiFePO4 batteries by advanced hydrometallurgical process, and the comprehensive recovery
efficiency can reach 80%. The specific process steps are as follows.
8.1 Recovery process and steps of cathode materials
Aluminum foil as collector is amphoteric metal. Firstly, it is dissolved in NaOH alkali solution
to make aluminum enter the solution in the form of NaAlO
2
. After filtration, the filtrate is
neutralized with sulfuric acid solution and precipitated to obtain Al (OH)
3
. When the pH
value is above 9.0, most of the aluminum precipitates, and the obtained Al (OH)
3
can reach
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