Dyness B4850 User manual

User Manual
B4850 ESS Unit

B4850 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
2.4 BATTERY MANAGEMENT SYSTEM(BMS)............................................................................................................ 10
2.4.1 Voltage Protection ................................................................................................................................ 10
2.4.2 Current Protection ................................................................................................................................. 10
2.4.3 Temperature Protection ...................................................................................................................... 11
2.4.4 Other Protection .................................................................................................................................... 11
3 INSTALLATION AND CONFIGURATION .................................................................................................. 11
3.1 READY FOR INSTALLATION ................................................................................................................................... 11
3.1.1 Environmental requirements .............................................................................................................. 12
3.1.2 Tools and data ....................................................................................................................................... 12
3.1.3 Technical preparation .......................................................................................................................... 12
3.1.4 Unpacking inspection ........................................................................................................................... 13
3.1.5 Engineering coordination .................................................................................................................... 14
3.2EQUIPMENT INSTALLATION.................................................................................................................................. 15
3.2.1 Installation preparation ........................................................................................................................ 15
3.2.2 Mechanical installation ......................................................................................................................... 15
3.2.3 Electrical installation ............................................................................................................................ 16
3.2.4 Battery parameter settings on the inverter .................................................................................... 18
3.2.5 Register on the website after installation ....................................................................................... 18
4 USE, MAINTENANCE AND TROUBLESHOOTING ................................................................................... 19
4.1 BATTERY SYSTEM USAGE AND OPERATION INSTRUCTIONS ..................................................................................... 19
4.2ALARM DESCRIPTION AND PROCESSING............................................................................................................... 20
4.3ANALYSIS AND TREATMENT OF COMMON FAULTS ............................................................................................... 21

B4850 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 autoorization 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-tech.com.cn
Please note that the product can be modified without prior notification.
Revision History
Revision NO.
Revision Date
Revision Reason
1.0
2019.04.24
First Published
1.1
2019.05.23
1. Add simple bracket installation
instructions
2. Format revision
1.2
2019.06.22
System adds DIP switch
1.3
2019.07.26
Update the cable specification and simple
bracket installation method
1.4
2020.07.15
1.Add battery parameter settings on the
inverter.
2.Add DIP setting for ICC.
3.Add register on the website after
installation.
4.Update the bracket installation
1.5
2020.09.27
1.Add new inverters in DIP switch description
修订历史产品版本

B4850 ESS Unit User Manual
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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 on
the same device.
⚫Please avoid any form of damage to battery, especially stab, hit, trample or strike.
⚫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 explosion.
⚫For your safety, please do not arbitrarily dismantle any component in any circumstances. The
maintenance must be implemented by authorized technical personnel or our company’s
technical support. Device breakdown due to unauthorized operation will not be covered under
warranty.
Caution
⚫Our product have been strictly inspected before shipment. Please contact us if you find any
abnormal phenomena such as device outer case bulging.
⚫The product shall be grounded properly before use In order to ensure your safety.
⚫To assure the proper use please make sure parameters among the relevant device are
compatible and matched.
⚫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 product life span, please comply with the
operation environment instruction to ensure 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 fully discharged or over-discharging protection
mode is activated.
Formula of theoretical standby time: T=C/I (T is standby time, C is battery capacity, I is total
current of all loads).

B4850 ESS Unit User Manual
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Preface
Manual declaration
B4850 lithium iron phosphate battery energy storage system can be combined in series or
parallel to provide energy storage function for photovoltaic power generation users. Our product
can store extra electricity into battery from photovoltaic power generation system in daytime
and supply stable power to user’s equipment as power backup at nighttime or any time when
needed. It can improve the efficiency of photovoltaic power generation and increase the electric
power efficiency by peak load shifting.
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
B4850 lithium iron phosphate battery system is a standard battery system unit, customers
can choose a certain number of B4850 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 energy storage applications with high operating
temperatures, limited installation space, long power backup time and long service life.
1.2 Product Properties
B4850 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.
⚫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
Figure 1-1 Battery Energy Storage System nameplate

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Battery voltage is higher than safe voltage, direct contact
with electric shock hazard.
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 B4850 Device size
Product
Nominal
Voltage
Nominal
Capacity
Dimension
Weight
B4850
DC48V
50Ah
480×360×90mm
≈22kg
2.2 Performance Parameter
Table 2-2 B4850 performance parameter
Item
B4850 Parameter value
Nominal Voltage(V)
48
Work Voltage Range(V)
42~54
Nominal Capacity(Ah)
50
Nominal Energy(kWh)
2.4
Nominal Power(kW)
0.7
Max Power(kW)
2.4
1S Peak Power(kW)
2.64
1S Peak Current(A)
55
Charging Current(A)
25
Discharge Current(A)
25
2.3 Interface Definition
This section elaborates the interface functions of the front interface of the device.
Figure2-1 The sketch of interface.
1
4
3
2
5
6
7
8
10
9
11

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Table 2-3 Interface Definition
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
4
Negative 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
spare
Host or slave
Baud rate selection
OFF
OFF:slave
OFF：CAN: 500K,485: 9600
ON:host
ON：CAN: 250K,485: 115200
DIP switch description:
When the batteries are connected in parallel, the host communicates with the slaves 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 cable from the host CAN IN to
the inverter comm port should be the correct one.
(2) When the battery works with GOODWE、Solis、
LUX、Sofar、DEYE、VICTRON、IMEON、Infinisolar、
Sungrow、SMA、RENAC、DELIOS、SAJ(CAN Comm) ，
Growatt HVM-ES/WPV(CAN port),before starting the
battery,you need put the host DIP switch "# 3" to the
"ON" position (to the top), then turn on the batteries.
(3) If the battery communicates with the Axpert-
king,Axpert-VMIII,Growatt SPH/SPA(CAN comm)、
GMDE、Saj(485 comm), turn the host DIP switch "#2" to
"ON" position.
(4) If the battery communicates with the Growatt SPF
HVM-P/ES/WPV by RS485 communication, turn the host
DIP switch "#2" and "#3" to "ON".
(5) If the battery module is in communication with the ICC
by 485 communication, turn the host DIP switch "#1" and
"#4" to "ON".
the DIP switch of the slaves need to turn the “#4”to “ON”.
(7) The DIP switch of the slaves no need to be changed.
(8) 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 cable that
communicates with the inverter
should use the correct one which
is offered by DYNESS.
(2) After the battery module
parallel cable, cascade cable and
the inverter communication cable
are connected, turn on all B4850
batteries.
(3)Before connecting with
inverter,please ensure the no-dip
battery firmware vertion support
yours inverter.
Caution：The DIP switch mode in case (5),1001 is only for ICC(a special commnunication
device of some no-communication inverter), it’s a specia firmware in BMS,different from general
firmware,so if customers want to use that,please contact dyness to confirm.