BYD B-Box H series User manual

B-BOX-H User Manual
B-Box H 6.4~11.5
User Manual
Rev.1.0_Aug.2017

B-BOX-H User Manual
Copyright © BYD Company Limited. All rights reserved.
Without BYD’s prior written permission, no entity and individual shall extract or copy part or all of the
content of this document or disseminate it in any form.
Statement:
The content of this Manual may be adjusted due to the update of product version or other reason only
when it is notified by BYD. Unless otherwise agreed, this document is only used as the guidance for
use, and all statements, information and suggestions in this document don’t constitute any explicit or
implied guarantee.
If you have any question, please contact us through the after-sales service website.
BYD Co., Ltd.
Tel.: [phone]
Fax: [phone]

Page 3
Contents
1 Overview.....................................................................................................................................................4
1.1 About this Manual ....................................................................................................................................... 4
1.2 Target Products........................................................................................................................................... 4
1.3 Usage........................................................................................................................................................... 4
1.4 B-Box HV Definitions .................................................................................................................................. 4
1.5 Product Identification .................................................................................................................................. 4
2 Safety Precautions .................................................................................................................................... 5
2.1 Safety Precautions...................................................................................................................................... 5
2.2 Safety Guideline for Installation ................................................................................................................. 6
3 Product Introduction ................................................................................................................................. 7
3.1 Introduction to B-Box HV System............................................................................................................... 7
3.2 B-Box HV Definitions .................................................................................................................................. 8
3.3 B-Box HV Configuration List....................................................................................................................... 8
3.4 B-Box HV System Diagram........................................................................................................................ 9
3.5 BCU Introduction......................................................................................................................................... 9
3.6 B-Plus-H Introduction................................................................................................................................ 11
4 Electrical Properties of B-Box HV System............................................................................................. 12
5 Cleaning and Maintenance...................................................................................................................... 14
5.1 Cleaning..................................................................................................................................................... 14
5.2 Storage and Maintenance ........................................................................................................................ 14
6 Disposal of Special Situations................................................................................................................ 14
6.1 Maintenance of battery Over-discharge................................................................................................... 14
6.2 Force Majeure........................................................................................................................................... 14
7 Configuration List of B-Box HV with Different Inverters...................................................................... 14
7.1 B-Box HV Configuration List with SMA Sunny Island –On grid.............................................................. 14
7.2 B-Box HV Configuration List with KOSTAL–On grid............................................................................... 14
8 Common Problems and Solutions ......................................................................................................... 15
9 Warranty................................................................................................................................................... 22

Page 4
1Overview
1.1 About this Manual
This Manual introduces B-Box H series product’s information, guidance for use, safety precautions and
common faults and troubleshooting. In the event of any abnormal fault or emergency, the user may contact
our after-sales service center.
1.2 Target Products
This Manual applies to B-Box H series products.
1.3 Usage
B-Box H applies to the household energy storage field. When B-Box H is connected to different inverters, the
user should use it with the designated inverter model by referring to the configuration list.
1.4 B-Box H series products Definitions
B-Box H: High-voltage household energy storage battery system.
B-Plus-H: Battery module. Battery module provides the energy, and sends the information about the cell
voltage and cell temperature in the battery module to the upper-layer BCU. The nominal capacity of battery is
1.28kwh.
BCU: The battery management and control part, which is connected to the battery module underneath and to
the inverter or BMU above.
1.5 Product Identification
The label describes the product identification attached on the product. For the safe usage, the user must
understand the content of the label.
The content of label contains:
Product Name：
Model No：
Nominal Voltage:
Capacity:
Output power:
Operating temperature：

Page 5
2Safety Precautions
2.1 Safety Precautions
Warning Caution Reminding
The user should use BYD batteries in strict accordance with the User Manual and related documents;
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
Please don’t crush the battery, and always dispose it according to the safety regulations (please don’t dispose
it in fire or water);
The battery shall be charged at least every six months during storage;
The battery shall be stored at the ambient temperature within -10~50℃;
The battery shall work at the ambient temperature within -10~50℃;
The battery shall avoid being exposed to direct sunlight;
Ensure reliable grounding;
Reverse connection of positive and negative terminals is not allowed;
Before maintenance and when adding batteries, switch off the battery system and power off the inverter;
To avoid danger, DO NOT remove the BCU module when the system is in operation.
Maintenance must be carried out by qualified personnel;
Store according to requirements in user manual.
The number of stack-up layers of the batteries with packaging during the transportation and storage shall not
be more than seven;
B-Box H can be used only in the household energy application, and is not allowed to be used inother industries,
such as the medical equipment and automotive application.
Caution
Continuous operation of a damaged B-Box H will lead to a dangerous situation that may cause serious injury
due to electrical shock., and B-Box H only can be operated when it is technically faultless and in an
operationally safe state.
Regularly check the B-Box H for visible damage, making sure that all safety equipment is freely accessible at
all times. If B-Box H is damaged, don’t touch it. Please contact BYD after-sales service provider if a significant
event message is displayed on the product or the inverter APP

Page 6
Warning
When operating the system, avoid touching the battery terminal with any metal objects or human body. All
work relating to electrical connections of the system shall be carried out by qualified personnel only.
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.
Installation and maintenance personnel must operate according to applicable federal, state and local
regulations as well as the industry standards regarding this product.
2.2 Safety Guideline for Installation
Warning
When install the system, avoid touching the battery terminal with any metal objects or human body.
All operations of B-Box H relating to electrical connection must be carried out by qualified personnel only.
B-Box H provides a safe source of electric energy when operated 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; Installation and maintenance personnel
must operate according to applicable federal, state and local regulations as well as the industry standards
regarding this product
Installation personnel may not wear metal accessories, etc. in order to avoid short circuit and personal
injury.
Warning
During loading, unloading and handling of the product, be cautious, and avoid accidents of product damage
and personal injury due to the falling of product.

Page 7
3Product Introduction
3.1 Introduction to B-Box H System
This product is a high-voltage DC battery system, with the operating voltage range within 200~500V. It is
applied to the household energy storage field and works together with high-voltage inverter, to realize the
energy storage and release. Each set of battery of the system supports the serial connection of 5~9 battery
modules, and parallel connection of 2~5 sets of battery systems.
Product overview
Major Components:
Outside View
B-Plus-H BCU BASE

Page 8
3.2 B-Box H Definitions
No.
Name
Definition
1
B-Plus-H
Battery module, consisting of battery pack (containing sixteen cells connected in
series), BIC and structural shell. It is the minimal maintenance unit of the system.
2
BCU
Battery management and control part, which contains BCU and charge-discharge
relay, and connected to the battery modules underneath and to the inverter or
BMU above.
3
Base
The base of the whole system.
4
BIC
Battery detection unit, which is used to detect the voltage, temperature and other
parameters of each cell in one battery module, and realizes communication with
BCU.
5
B-Box H
The whole product, containing 5-9 battery modules, one BCU module, a base and
other accessories.
3.3 B-Box HV Configuration List
No.
Name
Configuration
Energy (kWh)
Voltage
BCU
B-Plus-H
Base
1
B-Box H 6.4
1
5
1
6.4
200-282
2
B-Box H 7.7
1
6
1
7.68
240-338
3
B-Box H 9.0
1
7
1
8.96
280-395
4
B-Box H 10.2
1
8
1
10.24
320-451
5
B-Box H 11.5
1
9
1
11.52
360-500

Page 9
3.4 B-Box H System Diagram
System Diagram
3.5 BCU Introduction
The battery management and control part, which contains BCU and charge-discharge relay, and connected
to the battery modules underneath and to the inverter or BMU above.
3.5.1 BCU interface introduction [Left side]
Position
Designation
Left side terminals
A
Ethernet
B
CAN (Inverter)
C
Grounded
D
P-
E
P+

Page 10
3.5.2 BCU interface introduction [Right side]
3.5.3 BCU Functional Interfaces Definition
No.
Interface Name
Description
1
P+
The system positive terminal, connected to the inverter positive
terminal for battery
2
P-
The system negative terminal, connected to the inverter
negative terminal for battery
3
GND
Grounding terminal, connected to the ground.
4
Ethernet
Connected to the Ethernet, to complete the functions of
communication and remote program update.
5
Inverter
communication
Containing RS485, CAN, and enable signals, outputting 13V
power.
6
System switch
The main switch of system, which can be operated manually
and has the short circuit protection fun.
Position
Designation
Right side terminals
A
Air switch waterproof cover
B
System Air switch

Page 11
3.6 B-Plus-H Introduction
The electrical parameter design of battery module is as follows:
Product Model
B-Plus-H
Nominal voltage [V]
51.2
Capacity [Ah]
25
Stored energy [kWh]
1.28
Charge mode
Constant-voltage limited-current
Max. charge current
1C
Max. discharge current
Continuous at 1C, Peak at 2C, 5mins.
Operating temperature
-10℃~+50℃
Storage temperature
-10-50℃(<3 months, SOC: 20%-60%)
-10-30℃(<12 months, SOC: 20%-60%)

Page 12
4Electrical Properties of B-BOX HSystem
No.
Item
Description
1
Charge mode
Constant-voltage limited-current
2
Max. charge current
0.8C
3
Peak discharge current
2C, 5min
4
Max. discharge current
1C
5
Voltage detection accuracy of a single
battery
5mV
6
Temperature detection accuracy
2℃
7
Current detection accuracy
1%
8
SOC calculation accuracy
5%
9
SOH calculation accuracy
5%
10
Balancing mode
Passive balancing
11
Inverter interface
CAN/RS485: The communication line of battery and
inverter
POWER: The power output wire, 13V; the maximum
output power is 3W.
12
IP rating
IP55
13
Operating temperature
-10℃-- 50℃
14
Storage humidity
Less than or equal to 80%
15
Storage temperature
-10℃~ 45℃(<3 months, SOC: 20%-60%)
-10℃~ 40℃(<12 months, SOC: 20%-60%)

Page 13
a. Normally, the charge limited current is determined by the ambient temperature
No.
Temperature
Current
1
Less than -10℃
0
2
-10℃~0℃
0.2C
3
0℃~10℃
0.5C
4
10℃~50℃
0.8C
5
Greater than 50℃
0
b. Normally, the discharge limited current is determined by the ambient temperature
No.
Temperature
Current
1
Less than -20℃
0
2
-20~40℃
2C; if the actual discharge current is greater than 1.2C over 5min,
the discharge limited current will be renewed to 1C. 2 hours later, it
will be recovered to 2C discharge limited current.
3
40~50℃
0.5C
4
Greater than 50℃
0

Page 14
5Cleaning and Maintenance
5.1 Cleaning
When it is necessary to clean the shell of B-Box H, please remove the dirt with a soft dry brush or vacuum
cleaner.
Don’t use the liquids such as the solvent, abrasive materials or corrosive liquids to clean the shell.
5.2 Storage and Maintenance
As the battery capacity is 30% before transportation, the module needs maintenance after long-time storage.
At the maintenance, first fully discharge the battery with 0.1C current, and then charge the battery to 30% with
0.1C current. Please refer to the table below for details:
The number of Maintenance Times
Temperature
Charging interval (Months)
25℃
18
35℃
12
45℃
6
6Disposal of Special Situations
6.1 Maintenance of battery Over-discharge
If battery is over-discharged or rainy days continue, the battery may provide limited energy, and the user shall
pay attention to the battery’s backup time.
6.2 Force Majeure
Disastrous accidents, including thunder and lightning, flood, earthquake, fire, etc. may bring about
unpredictable destruction to the whole system.
7Configuration List of B-Box H with Different Inverters
7.1 B-Box H Configuration List with SMA Sunny Boy Storage
1 Phase on Grid
Inverter Type
B-Plus-H
BCU
SBS 2.5
5-9
1
7.2 B-Box H Configuration List with KOSTAL PIKO
3 Phase on Grid
Inverter Type
B-Plus-H
BCU
PIKO 6.0/8.0/10 BA
5-9
1
Cleaning:
When you need to clean B-Box H, please shut down the system first.

Page 15
8Common Problems and Solutions
Note:
1. The inverter may respond according to the alarms uploaded by the battery.
2. When something might endanger the battery system happens, the battery system will take appropriate
protective measures, such as disconnecting the charge-discharge relays or opening the system switch; if the
battery system automatically opens the system switch, please contact our Technical Support.
(The alarms generated by the battery system can be uploaded to the inverter, or be viewed on the webpage
of battery system.)
8.1 Alarms Uploaded to the Inverter
No.
Alarm Name
Causes of Alarm
Solutions
1
Warning-Battery High
Voltage
The cell voltage is too high.
Normal alarm, no further action
required
2
Alarm-Battery High Voltage
The cell voltage is too high.
Normal alarm, no further action
required
3
Warning-Battery Low
Voltage
The cell voltage is too low.
Normal alarm, no further action
required
4
Alarm-Battery Low Voltage
The cell voltage is too low.
Normal alarm, no further action
required
5
Warning-Battery Low Temp
The cell temperature is too
low.
Normal alarm, no further action
required
6
Alarm-Battery Low Temp
The cell temperature is too
low.
Normal alarm, no further action
required
7
Warning-Battery High Temp
The cell temperature is too
high.
Normal alarm, no further action
required
8
Alarm-Battery High Temp
The cell temperature is too
high.
Normal alarm, no further action
required
9
Warning-Battery High
Current Discharge
The discharge current is too
high.
Normal alarm, no further action
required
10
Alarm-Battery High Current
Discharge
The discharge current is too
high.
Normal alarm, no further action
required
11
Warning-Battery High
Current Charge
The charge current is too high.
Normal alarm, no further action
required
12
Alarm-Battery High Current
Charge
The charge current is too high.
Normal alarm, no further action
required
13
Warning-BMS internal
Communication error
Normal alarm, no further action
required
14
Alarm-BMS internal
Internal fault of battery system.
Contact the Technical Support.
15
Alarm-Precharge fault
Internal fault of battery system.
Contact the Technical Support.

Page 16
8.2 Alarms Viewed by Logging in the Webpage
No.
Alarm Name
Causes of Alarm
Solutions
1
BatteryCommErr
Communication error of BCU and
BIC.
Contact the Technical
Support.
2
MonitorCommErr
Internal fault of battery system.
Contact the Technical
Support.
3
BatteryPhaseErr
Internal fault of battery system.
Contact the Technical
Support.
4
BreakLineErr
Internal fault of battery system.
Contact the Technical
Support.
5
Discharge_OC1
The discharge current is too high.
Normal alarm, no further
action required
6
Discharge_OC2
The discharge current is too high.
Normal alarm, no further
action required
7
Discharge_OC3
The discharge current is too high.
Normal alarm, no further
action required
8
Discharge_OC4
The discharge current is too high.
Normal alarm, no further
action required
9
Cell_UV1
The cell voltage is too low.
Normal alarm, no further
action required
10
Cell_UV2
The cell voltage is too low.
Normal alarm, no further
action required
11
Cell_UV3
The cell voltage is too low.
Contact the Technical
Support.
12
Discharge_OT1
The cell temperature is too high.
Normal alarm, no further
action required
13
Discharge_OT2
The cell temperature is too high.
Normal alarm, no further
action required
14
Discharge_OT3
The cell temperature is too high.
Contact the Technical
Support.
15
Charge_OC1
The charge current is too high.
Normal alarm, no further
action required
16
Charge_OC2
The charge current is too high.
Normal alarm, no further
action required
17
Charge_OC3
The charge current is too high.
Normal alarm, no further
action required
18
Charge_OC4
The charge current is too high.
Normal alarm, no further
action required
19
Cell_OV1
The cell voltage is too high.
Normal alarm, no further
action required
20
Cell_OV2
The cell voltage is too high.
Normal alarm, no further
action required.

Page 17
21
Cell_OV3
The cell voltage is too high.
Contact the Technical
Support.
22
Charge_OT1
The cell temperature is too high.
Normal alarm, no further
action required
23
Charge_OT2
The cell temperature is too high.
Normal alarm, no further
action required
24
Charge_OT3
The cell temperature is too high.
Normal alarm, no further
action required
25
Charge_UT1
The cell temperature is too low.
Normal alarm, no further
action required
26
Charge_UT2
The cell temperature is too low.
Normal alarm, no further
action required
27
Cell_OT
The cell temperature is too high.
Contact the Technical
Support.
28
SeqStartTimeout
Internal fault of battery system.
Contact the Technical
Support.
29
Battery Diff
Internal fault of battery system.
Contact the Technical
Support.
30
BCUStart
Restart
If it occurs frequently,
please contact the
Technical Support.
31
BatteryLock
The cell voltage is too low.
Contact the Technical
Support.
32
ZeroResetErr
Internal fault of battery system.
Contact the Technical
Support.
33
ZeroResetFault
Internal fault of battery system.
Contact the Technical
Support.
34
BIC_AddrCalc
Battery address matching
Normal alarm, no further
action required
35
ChargeFault
Internal fault of battery system.
Contact the Technical
Support.
36
DischargeFault
Internal fault of battery system.
Contact the Technical
Support.
37
BatteryBreak
Internal fault of battery system.
Contact the Technical
Support.
38
HardwareFault
Internal fault of battery system.
Contact the Technical
Support.
39
PrechargeFault
Internal fault of battery system.
Contact the Technical
Support.
40
DCBusFault
DC Bus short connected
Contact the Technical
Support.
41
UpdateSuccess
Update succeed
Normal alarm, no further
action required
42
UpdateFail
Update fail
Contact the Technical
Support
43
SystemRestart
System restart
Normal alarm, no further
action required

Page 18
44
BMUProcCommErr
Internal fault of battery system.
Contact the Technical
Support
8.3 Log in the webpage
Enter correct IP address in the browser (IE, Google or Mozilla Firebox browsers are recommended), and then
enter the account number and password to log in (the login ID: user; password: user).
i. WIFI connection
First, connect the computer to the system’s WIFI (name: BYD+ product serial number without the first 3
numbers (for example: product serial number is BYD100171708-00001, then WIFI name is BYD171708-
00001, password: 123456789); then enter the IP: 192.168.5.1 in the browser, and enter the account
number and password to log in.
ii. LAN connection
Connect the battery system and the computer in the same LAN through a router, get the system’s IP
address on the router web page, then enter the system’s IP address or its host name (e.g. BYD171708-
00001) in the browser, and enter the account number and password to log in.
iii. Direct connection with network cable
Directly connect the computer to the network interface of battery system with the network cable, set the
computer’s IP address to put the computer and the system on the same network segment, enter the IP:
192.168.6.1 in the browser, and enter the account number and password to log in.
The interface after successful login is shown below:
Some basic information like serial number, IP address will be displayed on the interface.

Page 19
Click the ‘Statistic Information’ on the left, the user can view the total charging and discharging energy, and
the charging and discharging history.
Click the “Current Alarm” on the left, the user can view the current alarm of the system.

Page 20
Click the “History Alarm” on the left, the user can review the history alarm of the system.
Click the “Run Data” on the left, the user can view the run data of the system, including battery voltage, current
and temperature etc.