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]

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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

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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：

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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

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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.

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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

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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

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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+

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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