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ページを印刷するLithium BLUE – TROUBLESHOOTING
URGENCY
HIGH:
Action immediately
PRODUCTS CONCERNED
Discover Lithium BLUE Series
POSSIBLE SYMPTOMS
Refer to the latest version of the Manual https://assets.discoverbattery.com/documents/dl_blue/opm-dl-blue-manual.pdf.
Bluetooth will not connect:
Usually this is an issue on the connection device, rarely is there ever an issue with the battery bluetooth module.
Steps to resolve this issue:
•
Reset apps on connecting device (sometimes they can be running in background).
•
Check that no other devices are connected to the battery, one battery can only connect to one device each time.
•
Perform a BMS power reset (remove top cover/BMS, disconnect from battery, reconnect, and reinstall).
Charging issues / over voltage protection fault:
Generic lithium settings of many chargers on the market are too high.
•
Many manufacturers have moved to higher charge voltage settings. Discover charge specifications are based in
the interest of cell health and longevity.
a. Over voltage protection is triggered at >3.65V/cell; charger output may fluctuate and trigger protection even at
slightly lower settings.
•
Refer to the Manual for protections (section 2.4) and charge settings (section 7.4).
Discharge issues / low voltage protection fault:
•
Low voltage protection (2.5V/cell) should not be used as cut-off as it is the last line of defense.
•
Set low voltage cut-off at 3.0V/cell.
Storage / dead battery issues:
•
Failure to monitor the battery charge status can result in the battery becoming over-discharged and damaging cells
beyond recovery (affecting battery life expectancy and performance or becoming non-functioning).
•
Fully charge the batteries prior to storage.
•
Battery terminals should be disconnected. Many devices don't have a physical switch that disconnects power, but
rather shut down electronically. Parasitic power draws accelerate draining the battery.
•
Refer to the Manual section 11.
•
Batteries that have not been maintained and are left to over discharge need to be removed from service.
BMS Charge/Discharge control circuit damage:
The power electronics on the BMS can be sensitive to excessive ripple (usually a load such as a microwave) and
undersized wires. When either charge/discharge or both circuits are damaged, the battery will not allow either
charge/discharge or both.
•
To identify this, the battery will not be in fault or protection mode, but with a load the voltage gradually drops as if
there is a fault when attempt to discharge.
CUSTOMER SERVICE BULLETIN
MEDIUM:
Action by next possible occasion
MODEL
PART NUMBER
DLB-G24-12V
900-0046
DLB-G24-24V
900-0047
DLB-G24-36V
900-0048
Battery Voltage
Over Voltage Protection
12V
24V
36V
Battery Voltage
12V
24V
36V
CSB Number
Date
LOW:
Action if necessary
MODEL
DLB-GC12-12V
DLB-GC12-24V
>14.6V
>29.2V
>43.8V
Low Voltage Cut-off
12.0V
24.0V
36.0V
855-0015 Rev A
MAY 15 2023
GENERAL:
General Information
PART NUMBER
900-0049
900-0050
Page 1 of 2
F orm: 880-0015 Rev A