BYD Battery-Box Premium LV BMU User manual

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Battery-Box Premium LV BMU Instruction Manual
V 1.1
VALIDITY
This document is valid for the Battery-Box Premium LV BMU (Battery Management Unit) (“BMU”)
from firmware version 1.0.
INTENDED USE
BMU is applicable for the BYD Battery-Box Premium LV system(s) (LVS 3.8, LVS 7.7, LVS 11.5, LVS
15.4, LVS 19.2, LVS 23.0 and LVL 15.4) (“Battery-Box”), and works as a control unit for the
system(s).
PRODUCT DESCRIPTION
BMU is equipped with a WLAN interface as a standard. Special tools BYD developed could
communicate with BMU through it.
The WLAN name and code are on the label of BMU.
Assignment of Port B
No.
Assignment
1
485-A
2
485-B
3
Unused
4
CAN H
5
CAN L
6
Unused
7
Unused
8
Unused
A
B
C
D
A: RJ45 port for connection with
Battery-Box
B: RJ45 port for connection with an
inverter
C: Ethernet port
D: Stop button and status LED

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SCOPE OF DELIVERY
1×BMU
1×Instruction Manual
TECHNICAL DATA
Communication
Ethernet/CAN/RS 485
Input voltage*
40-60 V
Input current
200 mA
Weight
1 kg
Dimensions (L×W×H)
250 mm×122 mm×50 mm
Ambient temperature in operation
-10°C to 50°C
Relative humidity (non-condensing)
5% to 85%
Degree of protection (in accordance with IEC 60529)
IP21
*BMU is powered by Battery-Box through the network cable. No other power supply is needed.
MOUNTING
Install BMU on the wall or a rack. The recommended
expansion screw size is M4×12. The minimum distance
from the ground is 50 mm.
CONNECTION
1. The communication cable between BMU and an inverter cannot be longer than 10 meters.
And the cable should be CAT 5 shield or above.
2. Please make sure the correct pins are connected between BMU and an inverter.
3. The connection between BMU and Battery-Box should be the Straight-Through Wired Cable.
COMMISSIONING
1. Make sure an inverter, Battery-Box, and BMU are correctly connected.
2. Press the Start Button on Battery-Box for 3 seconds.

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LED STATUS
Flashing
white and
blue
alternatively
BMU and
Battery-Box are
initiating.
Glowing
white
Idle (Battery-Box
is neither
charging nor
discharging).
Flashing
white slowly
Battery-Box is
charging.
Flashing
white quickly
Battery-Box is
discharging.
Flashing
white and
glowing blue
Battery-Box is
discharging, and
the SOC of
Battery-Box is
below 15%.
Flashing
white and
blue
An error has
occurred. **
**1s white once then 1s blue several times are a circle, and also error codes. The definition of the
error codes could be found in Battery-Box Premium Operating Manual LVL or LVS.
UPDATING FIRMWARE
The firmware of BMU could only be updated when it operates with Battery-Box. Please refer to
the Operating Manual of Battery-Box for further information.
DISPOSAL
Dispose of BMU following the locally applicable disposal regulations for electronic waste.