Dyness B3 ESS B4870 User manual

B3 ESS Unit
User Manual

B3 ESS Unit User Manual
I
Content
Statement of Law .....................................................................................................................................1
Safety Precautions.................................................................................................................................... 2
Preface...................................................................................................................................................... 3
1 Introduction.......................................................................................................................................... 4
1.1 Brief Introduction..........................................................................................................................4
1.2 Product Properties........................................................................................................................4
1.3 Product identity definition............................................................................................................4
2 Product Specification............................................................................................................................6
2.1 Size and Weight ............................................................................................................................6
2.2 Performance Parameter ...............................................................................................................6
2.3 Interface Definition....................................................................................................................... 6
2.3.1 DIP switch definition and description ....................................................................................7
2.4Battery Management System(BMS) ...........................................................................................10
2.4.1 Voltage Protection ..............................................................................................................10
2.4.2 Current Protection ..............................................................................................................10
2.4.3 Temperature Protection .....................................................................................................10
2.4.4 Other Protection ................................................................................................................. 11
3 Installation and Configuration ............................................................................................................12
3.1 Ready for installation..................................................................................................................12
3.1.1 Environmental requirements ..............................................................................................12
3.1.2 Tools and data.....................................................................................................................12
3.1.3 Technical preparation .........................................................................................................13
3.1.4 Unpacking inspection..........................................................................................................13
3.1.5 Engineering coordination....................................................................................................13
3.2 Equipment installation................................................................................................................14
3.2.1 Installation preparation .......................................................................................................15
3.2.2 Mechanical installation ........................................................................................................15
3.2.3 Electrical installation ...........................................................................................................16
4 Use, maintenance and troubleshooting .............................................................................................18
4.1 Battery system usage and operation instructions ......................................................................18
4.2Alarm description and processing...............................................................................................18
4.3Analysis and treatment of common faults..................................................................................19

B3 ESS Unit User Manual
1
Statement of Law
Copyright of this document belongs to Jiangsu Daqin New Energy Technology Co., Ltd.
No part of this documentation maybe excerpted, reproduced, translated,
annotated or duplicated in any form or by any means without the prior
written permission of Jiangsu Daqin New Energy Technology Co., Ltd. All Rights Reserved.
This product complies with the design requirements of environmental protection and personal
safety. The storage, use and disposal of the products shall be carried out in accordance with the
product manual, relevant contract or relevant laws and regulations.
Customer can check the related information on the website of Jiangsu Daqin New Energy
Technology Co., Ltd when the product or technology is updated. Web URL：
http://www.dyness.net/
Please note that the product can be modified without prior notice.
Revision History
Revision NO. Revision Date Revision Reason
1.0 2019.04.24 First Published
1.1 2019.06.24
1. System adds DIP switch
2. Renamed B4874 to B3
1.2 2019.07.29 Update the cable specification
修订历史产品版本

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Safety Precautions
Warning
Please do not put the battery into water or fire, in case of explosion or any other situation
that might endanger your life.
Please connect wires properly while installation, do not reverse connect.
To avoid short circuit, please do not connect positive and negative poles with conductor
(Wires for instance).
Please do not stab, hit, trample or strike the battery in any other way.
Please shut off the power completely when removing the device or reconnecting wires during
the daily use or it could cause the danger of electric shock.
Please use dry powder extinguisher to put out the flame when encountering a fire hazard,
liquid extinguisher could result in the risk of secondary disaster.
For your safety, please do not arbitrarily dismantle any component in any circumstances
unless a specialist or an authorized one from our company, device breakdown due to
improper operation will not be covered under warranty.
Caution
We have strict inspection to ensure the quality when products are shipped out, however,
please contact us if case bulging or another abnormal phenomenon.
For your safety, device shall be ground connected properly before normal use.
To assure the proper use please make sure parameters among the relevant device are
compatible.
Please do not mixed-use batteries from different manufacturers, different types and models,
as well as old and new together.
Ambient and storage method could impact the life span and product reliability, please
consider the operation environment abundantly to make sure device works in proper
condition.
For long-term storage, the battery should be recharged once every 6 months, and the amount
of electric charge shall exceed 80% of the rated capacity.
Please charge the battery in 18 hours after it discharges fully and starts over-discharging
protection.
Formula of theoretical standby time: T=C/I (T is standby time, C is battery capacity, I is total
current of all loads).

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Preface
Manual declaration
The B3 lithium iron phosphate battery energy storage system can provide energy storage
solutions for photovoltaic power generation users through parallel combination. During the day,
the excess power of photovoltaic power generation can be stored in the battery. At night or
when needed, the stored electrical energy can be used to supply power to the electrical
equipment, which can improve the efficiency of photovoltaic power generation, peak load
shifting, and emergency power backup.
This user manual details the basic structure, parameters, basic procedures and methods of
installation and operation and maintenance of the equipment.

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1 Introduction
1.1 Brief Introduction
B3 lithium iron phosphate battery system is a standard battery system unit, customers can
choose a certain number of B3 according to their needs, by connecting parallel to form a
larger capacity battery pack, to meet the user's long-term power supply needs. The product
is especially suitable for applications with high operating temperatures, limited installation
space, long power backup time and long service life.
1.2 Product Properties
B3 energy storage product’s anode materials are lithium iron phosphate, battery cells are
managed effectively by BMS with better performance, the system’s features as below:
Comply with European ROHS, Certified SGS, employ non-toxic, non-pollution
environment-friendly battery.
Anode materials are lithium iron phosphate (LiFePO4), safer with longer life span.
Carries battery management system with better performance, possesses protection
function like over-discharge, over-charge, over-current, abnormal temperature.
Self-management on charging and discharging, Single core balancing function.
Intelligent design configures integrated inspection module, with 3 remote functions
(remote-measuring, remote-communicating and remote-controlling).
Flexible configurations allow parallel of multi battery for longer standby time.
Self-ventilation with lower system noise.
Less battery self-discharge, then recharging period can be up to 10 months during the
storage.
No memory effect so that battery can be charged and discharged shallowly.
With wide range of temperature for working environment, -20oC ~ +55 oC, circulation
span and discharging performance are well under high temperature.
Less volume, lighter weight.
1.3 Product identity definition
Figure1-1 Battery Energy Storage System nameplate
Battery voltage is higher than safe voltage, direct contact
with electric shock hazard.

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Be careful with your actions and be aware of the dangers.
Read the user manual before using.
The scrapped battery cannot be put into the garbage can
and must be professionally recycled.
After the battery life is terminated, the battery can
continue to be used after it recycled by the professional
recycling organization and do not discard it at will.
This
battery product meets European directive
requirements.
This battery product passed the TUV certification test.
Dangerous goods warning label on the top of the battery
module

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2 Product Specification
2.1 Size and Weight
Table 2-1 B3 Device size
Product Nominal
Voltage
Nominal
Capacity Dimension Weight
B3 DC48V70Ah 480×380×130mm ≈30kg
B3 DC48V 74Ah 480×380×130mm ≈31kg
B3 DC48V 75Ah 480×380×130mm ≈31kg
2.2 Performance Parameter
Table 2-2 B3 performance parameter
Item B3 Parameter value B3 Parameter value B3 Parameter value
Nominal Voltage(V) 48 48 48
Work Voltage Range(V) 42~54.75 42~54.75 42~54.75
Nominal Capacity(Ah) 70 74 75
Nominal Energy(kWh) 3.36 3.55 3.6
Nominal Power(kW) 1.0 1.06 1.08
Max Power(kW) 2.4 2.4 2.4
3S Peak Power(kW) 2.64 2.64 2.64
3S Peak Current(A) 55 55 55
Charging Current(A) 35 37 37.5
Discharge Current(A) 35 37 37.5
2.3 Interface Definition
This section elaborates on interface functions of the front interface of the device.
Figure2-1 The sketch of interface.
Table 2-3 Interface Definition
1
4
3
2
5
6
7
8
10
9
11

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Item Name Definition
1 Power switch
OFF/ON,
must be in the "ON" state when in use
2
Ground
connection point
Shell ground connection
3 Positive socket Battery output positive or parallel positive line
4Negative socket Battery output negative or parallel negative line
5
SW (battery
wake/sleep
switch)
When the "OFF/ON" switch button is in the ON state, press
and hold this button for 3 seconds to put the battery into the
power-on or sleep state.
6 SOC
The number of green lights on shows the remaining battery
power. See Table 2-3 for details.
7 ALM
Red light flashing when an alarm occurs, red light always on
during protection status. After the condition of trigger
protection is released, it can be automatically closed.
8 RUN
Green light flashing during standby and charging mode.
Green light always on when discharging.
9 CAN/485
Communication cascade port, support CAN/ RS485
communication (factory default CAN communication)
10 DRY CONTACT /
11 ADD DIP switch
2.3.1 DIP switch definition and description
Table 2-4 Interface Definition
DIP switch position (host communication protocol and baud rate selection)
#1 #2 #3 #4
Baud rate selection
ON OFF
CAN: 250K,485: 115200 CAN: 500K,485: 9600
DIP switch description:
When the battery pack is connected in parallel, the host can communicate with the slave
through the CAN interface. The host summarizes the information of the entire battery system
and communicates with the inverter through CAN or 485. The connection mode is divided into
the following two cases:

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1. If the host is the latest B4850 battery with DIP
switch:
(1) The communication line that communicates
with the inverter should use the one that the 6
and 7 pins are not short-circuited.
(2) After the battery module parallel line,
cascading line and communication line with
GOODWE, Solis, LUX, Sofar, DEYE, VICTRON,
IMEON, Voltronic, Sungrow, RENAC and DELIOS
inverters are connected, all B4850 batteries
should not be turned on first, be sure to put the
host DIP switch "# 3" to the "ON" position (to
the top), then turn on all the B4850 batteries.
(3) If the battery module is in communication
with the inverters of Growatt, GMDE, Saj or
AXPERT turn the host DIP switch "#2" to "ON"
position.
(4) If the battery module is in communication
with the GROWATT-SPF-off-grid inverter by 485
communication, turn the host DIP switch "#2"
and "#3" to "ON".
(5) The DIP switch of the slave does not need to
be changed.
(6) If the energy storage system has only one
B4850, it is the host itself, and still follow the
above steps.
Note: For more information of matching inverter
brands, please subject to the latest document
<The list of compatibility between Dyness ESS
and Inverters >.
2. If the host is a B4850 battery module
without the DIP switch:
(1) The communication line that
communicates with the inverter should
use the one that the 6 or 7 pins are short
circuit connection.
(2) After the battery module parallel line,
cascade line and the inverter
communication line are connected, turn
on all B4850 batteries.
(3) If there is a battery module with the
latest DIP switch in the slave, please do
not turn the DIP switch "#2" or "#3" to
"ON" position to avoid the slave and the
existing host grab the host communication
status, an error occurs.
Figure 2-2 CAN/485 interface definition