BYD B-Box Pro2.5 User manual

B-Box Professional user manual
B-Box Pro 2.5~10.0
User Manual
V2.2_July, 2017
Copyright © BYD Company Limited. All rights reversed.
Without the written consent of BYD Company, no entity or individual shall extract, copy contents of the document. It is not allowed
to be translated under any conditions.

B-Box Professional user manual
Statement:
The product version update or any other changes to this manual is only allowed with BYD’s prior agreement. Unless otherwise
agreed, the document should be used for guidance only, all statement information and suggestions in this document do not constitute
any expression of contract or liability.
Please contact BYD directly, if you have any further questions.
BYDLithiumBatteryCompanyLimited
TEL: [phone]
FAX: [phone]

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1 GENERAL INFORMATION ................................................................................................................................................................................... 5
1.1 A BOUT THIS MANUAL .......................................................................................................................................................................................................5
1.2 T ARGET G ROUP .................................................................................................................................................................................................................5
1.3 I NTENDED USAGE ..............................................................................................................................................................................................................5
1.4 B-BOX AND B-P LUS DEFINITION ....................................................................................................................................................................................5
1.5 I DENTIFYING THE P RODUCT .............................................................................................................................................................................................5
2 SAFETY ........................................................................................................................................................................................................................ 7
2.1 S AFETY PRECAUTION ........................................................................................................................................................................................................7
2.2 S AFETY GUIDELINES FOR INSTALLATION ........................................................................................................................................................................9
3 TECHNICAL PARAMETERS ............................................................................................................................................................................... 10
4 TECHNICAL TERMS EXPLANATION ............................................................................................................................................................. 11
5 PRODUCT OVERVIEW ......................................................................................................................................................................................... 12
5.1 B-BOX S YSTEM B RIEF INTRODUCTION .......................................................................................................................................................................12
5.2 B-BOX CONFIGURATION TABLE ...................................................................................................................................................................................14
5.3 B-BOX S YSTEM DIAGRAM .............................................................................................................................................................................................14
5.4 G ENERAL INTRODUCTION OF BMU ..............................................................................................................................................................................15
5.5 G ENERAL INTRODUCTION OF B-P LUS 2.5 .....................................................................................................................................................................15
5.6 O PERATING ENVIRONMENT ............................................................................................................................................................................................18
5.7 B-P LUS 2.5 ADDRESS SWITCH INTRODUCTION .............................................................................................................................................................18
6 CLEANING AND MAINTENANCE .................................................................................................................................................................... 19
6.1 C LEANING ........................................................................................................................................................................................................................19
6.2 M AINTENANCE ................................................................................................................................................................................................................19
6.2.1 Recharge requirement with normal storage ........................................................................................................................................................19
6.2.2 Recharge requirement with over discharge storage ..........................................................................................................................................20

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7 RESOLVE SPECIAL SITUATION ....................................................................................................................................................................... 20
7.1 B ATTERY OVER DISCHARGED MAINTENANCE ..............................................................................................................................................................20
7.2 F ORCE M AJEURE .............................................................................................................................................................................................................20
8 B-BOX CONFIGURATION LIST WITH DIFFERENT INVERTER ............................................................................................................ 21
8.1 B-BOX CONFIGURATION LIST WITH SMA SUNNY ISLAND -O N /O FF GRID ................................................................................................................21
8.2 B-BOX CONFIGURATION LIST WITH GOODWE ES-O N /O FF GRID ..........................................................................................................................22
8.3 B-BOX CONFIGURATION LIST WITH GOODWE BP-O N GRID ..................................................................................................................................22
8.4 B-BOX CONFIGURATION LIST WITH V ICTRON M ULTIPLUS /M ULTIGRID -O N /O FF GRID .........................................................................................23
8.5 B-BOX CONFIGURATION LIST WITH S OLAX -O N GRID ................................................................................................................................................23
8.6 B-BOX CONFIGURATION LIST WITH V ICTRON Q UATTRO - O N /O FF GRID .................................................................................................................24
9 NORMAL ISSUES AND SOLUTIONS ................................................................................................................................................................ 25
9.1 N ORMAL ALARM DISPLAYED ON THE SRC OF SMA SUNNY ISLAND AND THE SOLUTION ......................................................................................25
9.2 N ORMAL ALARM DISPLAYED ON THE APP OF GOODWE AND THE SOLUTION .......................................................................................................26
9.3 N ORMAL ALARM DISPLAYED ON THE SCREEN OF S OLAX AND THE SOLUTION .........................................................................................................26
9.4 N ORMAL ALARM DISPLAY ON THE BMU OF B-BOX AND THE SOLUTION ...............................................................................................................27
9.5 N ORMAL ALARM DISPLAY ON B-P LUS 2.5 AND SOLUTION .........................................................................................................................................27
10 WARRANTY ........................................................................................................................................................................................................... 29
11 LOGIN IN AFTER SALES SERVICE WEB ..................................................................................................................................................... 29

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1 General Information
1.1 About this manual
This user manual introduces the B-Box product information, user guidance, safety caution items and normal failure and actions. Users can
contact the after sales service center if any abnormal failure or urgent issues occur.
1.2 Target Group
This user manual is applied to the B-BOX 2.5, B-BOX 5.0, B-BOX 7.5, and B-BOX 10.0.
1.3 Intended usage
The B-BOX can be used in household energy storage applications, including on/off-grid system. The B-BOX works with different inverter
brands and the user should refer to the configuration list of approved inverter brands recommended by BYD.
1.4 B-BOX and B-Plus definition
BYD battery box productsB-Box2.5~B-Box10.0 are defined as below:
B-Box: Battery Box
B-Plus2.5: Battery unit with nominal capacity of 2.56KWh to be installed inside the cabinet as an energy storage module.
B-Box2.5: Battery nominal capacity is 2.56 KWh (Includes 1pcs B-Plus2.5)
B-Box 5.0: Battery nominal capacity is 5.12 KWh (Includes 2pcs of B-Plus2.5)
B-Box 7.5: Battery nominal capacity is 7.68 KWh (Includes 3pcs of B-Plus2.5)
B-Box 10.0: Battery nominal capacity is 10.24 KWh (Includes 4pcs of B-Plus2.5)
1.5 Identifying the Product
The type label describes the product identification information, which is attached to the product. For safe usage, the user m ust become familiar
with the information on the type label. The type label displays:

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Product Name:
Product Type/Nominal Capacity:
Nominal Voltage:
Max Current Discharge & Charge:
Ambient Temperature Range:

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2 Safety
2.1 Safety precaution
Warning, notice and caution
Users are kindly requested to use the battery which is supplied by BYD Lithium Battery Company Limited in strict accordance with the
datasheet and remarks included at the end of this document.
BYD Lithium Battery Co., Ltd. will not guarantee or accept liability for a product installed and operated not in accordance to the guidance manual
and resulting in an accident.
WARNING
Do not crush the battery and always dispose according to safety regulations (Do not dispose in fire or water).
Recharge battery at least every 6 months (when in storage).
Once discharged, recharge battery within 7 days.
Do not expose to temperatures above 55 ℃ and keep out of direct sunlight.
Ensure secure grounding. Do not reverse the front panel.
Do not short/reverse polarity or connect in series.
Disconnect from power and load before maintenance.
Only be operated by qualified professionals.
Store according to related standard.
Do not put one battery on top of another when unpackaged.
In the process of transportation and storage, the goods are not allowed to be stacked in layers or at a height greater than s pecified.
When increasing the battery capacity, users should first power off the battery and other power inputs.
B-BOX products can only be used in home energy storage applications, and their use is not allowed for life-sustaining medical devices and
automotive applications.

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NOTICE
Continuous operation of a damaged B-Box can lead to a dangerous situation that may cause serious injury due to electrical shock. B-Box can
only be operated when it is technically faultless and in an operationally safe state.
Regularly check the B-Box for visible damage making sure that all safety equipment is freely accessible at all times. If a B -Box is damaged,
do not touch it.
Please contact a BYD after sales service supplier if a significant event message displays on the LCD or APP of the inverter.
CAUTION
Li-ion battery inside. When disassembling the system, do not intentionally short the positive (+) and negative (-) terminals with metallic
objects.
All works on system and electrical connections must be carried out by qualified personnel only. B-Box provides an emergency switch to be
used for urgent situations.
A potentially hazardous circumstance such as excessive heat or electrolyte mist may occur due to incorrect operation, damage or abuse. If the
safety precautions and the warning messages described are not fully understood, or if you have any questions, please contact after sales service
for guidance. The safety section may not include all regulations for your region.
Personnel working with B-Box products must review applicable federal, state and local regulations as well as the industry standards regarding
this product.
When transporting the system packaged as a bundle, remove the battery from the cabinet and transport them separately .

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2.2 Safety guidelines for installation
CAUTION
Li-ion battery (energy storage unit) inside. When assembling the system, do not intentionally make a short connection between the positive (+)
and negative (-) terminals of the battery box with a metallic object.
All works on the B-Box and electrical connections must be carried out by qualified personnel only.
B-Box provides a safe source of electrical energy when operated as intended and as designed.
Potentially hazardous circumstances such as excessive heat or electrolyte mist may occur under improper operating conditions, damage,
misuse and abuse.
The following safety precautions and the warning messages described in this section must be observed. If any of the following precautions are
not fully understood, or if you have any questions, contact customer service for guidance. The Safety Section may not include all regulations
for your region; personnel working with B-Boxes must review applicable federal, state and local regulations as well as the industry standards
regarding this product.
Installation personnel cannot wear watches, etc., to avoid short circuit and accidental damage.
CAUTION
Due to the heavy weight of BYD B-Box 2.5~10.0, please use strong packaging and safety protection equipment during transportation, to
ensure safety and avoid accidental damage.

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3 Technical parameters
When B-BOX works in different temperatures, the charge and discharge current will be adjusted automatically. For detailed parameter settings,
please refer to the table below:
Parameter setting of charge current in various temperature
Protect temp./Resume temp.(℃)
Normal current(A)
-7~2
0.06C*N
2~12
0.12C*N
12~50
0.7C*N
Remarks:
1. Effective time is 2mins when changing from one temperature range to another.
2. N=B-Plus2.5 battery quantity
B-Box Pro2.5
B-Box Pro5.0
B-Box Pro7.5
B-Box Pro10.0
Battery Type
Lithium Iron phosphate battery
Battery module
B-Plus2.5
Nominal Battery Energy
2.56
5.12
7.68
10.24
Max output power(KW)
2.56
5.12
7.68
10.24
Usable battery energy(KWh)(100% DOD, 0.5C charge
&discharge at @+25℃)(KWh)
2.56
5.12
7.68
10.24
Nominal voltage(V)
51.2
Operating Voltage Range(V)
43.2~56.4
Ambient Temperature Range(℃)
-10~+50
Communication
RS485/CAN
Cabinet Net Dimension(W*D*H mm)(Without ground feet)
600* 510* 883
Net Weight(Kg)
79
113
146
180
IP level
IP20

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Discharge current control with temperature
Protect temp./Resume temp.(℃)
Normal current(A)
-20~50/(-15-50)
0.7~1C*N
Remarks:
1. N= B-Plus2.5 battery quantity
4 Technical terms explanation
No.
Terms
comment
1
Discharge
Battery output power for load
2
Charge
Battery power supply(such as DC charger)
3
Full charged
Battery had been full charged, SOC is 100%.
4
Idle
Battery is on status of neither charge nor discharge and has not been fully charged.
5
Shutdown mode
Power off
6
SOC
State of Charge
7
SW
Software
8
HW
Hardware
9
Battery voltage
The voltage between B+/B-
10
Pack voltage
The voltage between P+/P-
11
Cell voltage
Single cell voltage
12
Failure
Battery or BMS are broken, and unit needs replacement
13
Alarm
Battery will stop charging or discharging immediately
14
Protect
Battery stops charging or discharging (e.g. cell is overvoltage). Operation can resume at
a later stage.
15
Over discharged
Battery module or batteries overvoltage, need to be recharged timely

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5 Product overview
5.1 B-BOX System Brief introduction
B-Box is the short name for battery box, the energy storage part in the electric power system of a household, and the B-box carries BYD’s
lithium batteries offering excellent performance. There are 1/2/3/4 pcs batteries modules in each box, and the box supports p arallel connection
to expand capacity from 2.5KWh to 80KWh, which can meet various capacity requirement for customers.
External drawing

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Internal drawing
Structure dimension drawing

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5.2 B-BOX configuration table
No.
Component
Name
Description
1
Cabinet
B-Box Cabinet
The cabinet is used to accommodate the B-Plus 2.5 modules and
provide DC output (It can take max 4pcs B-Plus 2.5)
2
Battery
B-Plus2.5
Battery module with 51.2V 50Ah, BYD’s P/N is: U3A1-50P-A.
3
BMU
BMU
Battery management unit. Provides communication with external
equipment.
5.3 B-BOX System diagram
System diagram

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5.4 General introduction of BMU
BMU is the battery management unit installed in the cabinet; its function is to manage the battery’s charge and discharge, co llect information
from the battery and report to the inverter..
Main function:
 CAN / RS485 communication with inverter
 RS485 communicate with battery/BMS
 Dry contact terminal
 Other Communication interface for maintenance
 Charge and discharge management
5.5 General introduction of B-Plus 2.5
B-Plus is the commercial name of BYD’s U3A1-50P-A backup battery with 51.2V & 50Ah which is designed for energy storage applications.
The B-Plus 2.5 is an integrated battery which consists of shell, BMS and cells.
⑩

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B-Plus 2.5 overview
Display and communication interface
Display and
communicate interface
GND: Grounded
terminal
P-: Negative terminal (DC+)
P+: Positive terminal (DC-)
l

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Display and communication interface
No.
Interface
Mark
Function

SOC LED
SOC
Indicates State of capacity of battery

RUN LED
RUN
Indicates the Plus is running status

ERR LED
ERR ADDR
Indicates error status

ALM LED
Alarm
Indicates alarm status

RJ45 terminal
RS485
Communication ports

Address
ADDR
When parallel connection, need setting address.

Alarm relay output
1.2.3.4
Not used

Test terminal
B- B+
Measures battery voltage when testing.

ON/OFF
ON/OFF
Activates battery when no external powers add on battery.

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5.6 Operating environment
Operating environment parameters
No.
Item
Requirement
Unit
Remark
Min.
Typical
Max.
1
Discharging temperature
-10
25
50
℃
2
Charging temperature
-10
25
50
℃
3
Relative humidity
5
95
%
4
Absolute humidity
0.26
25
g/m3
5
Elevation
-
2000
-
m
6
IP level
20
5.7 B-Plus 2.5 address switch introduction
After finished the battery installation, installer should setup battery address through the “ADDR” switch.
“ADDR” switch introduction:
Function: Communication between battery and BMU. The BMU will communicate with external equipment when using CAN
communication.
Each DIP switch definition:
There are 6 bit switches, keeping it down means “0”, turn up the switch to “ON” means “1”.
Address: 000000 Address:100000
For example: when two batteries are in use, “ADDR”setting shows:

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No.1 battery address: 100000 No.2 battery address: 010000
Please refer to the configuration list in Appendex1.
Note: Make sure of the highest address of BMS connecting to the BMU when communicating with the inverter.
6 Cleaning and maintenance
6.1 Cleaning
The B-BOX system is recommended to be cleaned periodically. If the enclosure is in a dirty condition, please use a soft and dry brush or a
vacuum to remove the dirt.
Do not use liquids such as solvents, abrasives or corrosive liquids in the enclosures.
6.2 Maintenance
6.2.1 Recharge requirement with normal storage
The B-BOX should be installed in a position with a temperature range of -10
℃～ +50 ℃ and where the humidity is less than 80%.The
load-bearing of the battery’s packaging is less than 300Kg, so stacking more than 7 modules is not recommended..
When the battery stored for a long time, need a regular maintenance according to the following tab le. Charge battery with current of 0.5C
(25A) for 1 hour when maintenance.
Storage parameters under different storage conditions-1
Storage environment temperature
Relative humidity of storage environment
Storage time
SOC
Below -20℃
/
Avoid
/
-20~25℃
5%~70%
≤12 months
30%≤SOC≤60%
CAUTION:
When users need to clean the B-BOX, please switch off the system firstly.

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25~35℃
5%~70%
≤6months
30%≤SOC≤60%
35~45℃
5%~70%
≤3months
30%≤SOC≤60%
Above 45℃
/
Avoid
/
6.2.2 Recharge requirement with over discharge storage
If module is over-discharged during storage, the module will be damaged after several days if the module has not been charged in time.
Storage parameters under different storage conditions-2
Storage environment temperature
Storage time
-20~25℃
≤15 days
25~45℃
≤7 days
7 Resolve special situation
7.1 Battery over discharged maintenance
In the case of power cuts, continuous rainy days etc., the battery may over-discharge. It will still provide limited energy, but users should pay
attention to the backup time of the battery.
7.2 Force Majeure
Catastrophic accidents, including lightning, floods, earthquakes, fires and other natural disasters, can bring unpredictable damage to the whole
system.