D-powercore Co., LTD.

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The Product Specification of Lithium Battery Management System
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Product Name:DXB26
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----------------D-powercore Co., LTD (BMS Division)

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TEL:86-22-87895805-86 FAX:86-22-87895805-87
Add：Hydratight Rd.6 F2-201，Huayuan Industrial Park,TianJin China
URL：www.d-powercore.com
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 D-powercore Co., LTD.

 Preface
Thank you for using the company's DXB26 series lithium battery management system, in
order to enable you to better use and maintain this product, please read this specification carefully
before you use it.
The DXB26 series is a battery management system designed and manufactured by the
company for 3-4 series power lithium battery pack. It can provide perfect protection for
multi-string lithium battery pack. It can accurately calibrate lithium battery parameters such as
voltage, current and temperature. It can be a variety of fault detection alarm and do the relevant
work, the system has a black box function, real-time recording of the events’ time and code data.
The system uses the Calculation of Coulomb Electricity, and it can realize the dynamic accurate
estimation of the electric quantity through the calculation and the compensation. The system has a

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balanced function, through a unique balance mechanism to ensure and extend the available
capacity of batteries.

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Through UART communication , the system can communicate with controller, display,
mobile App, PC and other system unit to realize real-time monitoring of battery pack information
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and the demands of other special functions.
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TEL:86-22-87895805-86 FAX:86-22-87895805-87
Add：Hydratight Rd.6 F2-201，Huayuan Industrial Park,TianJin China
URL：www.d-powercore.com
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 D-powercore Co., LTD.

 Catalog
1. Product Size and Wiring ....................................................................................................... 4
1.1 Product Size ........................................................................................................................ 4
1.2 Product wiring diagram ....................................................................................................... 5
1.3 Note ..................................................................................................................................... 5
2. Electrical performance of products ....................................................................................... 6
2.1 Product electrical parameters .............................................................................................. 6
2.2 Note ..................................................................................................................................... 7
3. Communication Connection.................................................................................................. 7
3.1 Network communication UART ......................................................................................... 7
4 Operation Instructions ............................................................................................................ 8

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4.1 Battery Boot ........................................................................................................................ 8
4.2 Battery Power-off ................................................................................................................ 8

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4.3 Safety of Battery ................................................................................................................. 8
5. Date Modified ....................................................................................................................... 9
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TEL:86-22-87895805-86 FAX:86-22-87895805-87
Add：Hydratight Rd.6 F2-201，Huayuan Industrial Park,TianJin China
URL：www.d-powercore.com
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 D-powercore Co., LTD.

1. Product Size and Wiring

1.1 Product Size

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High:12mm

Figure 1-1 Size of DXB26 Series（mm）

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Remark: the tolerance of size is less than 0.5mm.
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TEL:86-22-87895805-86 FAX:86-22-87895805-87
Add：Hydratight Rd.6 F2-201，Huayuan Industrial Park,TianJin China
URL：www.d-powercore.com
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 D-powercore Co., LTD.

1.2 Product wiring diagram

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Figure 1-2 Diagram of System Wiring (4 series)

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There is a diagram about the connection of 4 series batteries with BMS, please contact our
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company if more information.

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1.3 Note
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 BMS communication using optocoupler isolation, so its external need to be provided power
while communication.
 System wiring must be consistent with the specific BMS products; otherwise there will be
short-circuit risk.

TEL:86-22-87895805-86 FAX:86-22-87895805-87
Add：Hydratight Rd.6 F2-201，Huayuan Industrial Park,TianJin China
URL：www.d-powercore.com
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 D-powercore Co., LTD.

2. Electrical performance of products

2.1 Product electrical parameters

Suggested
Item Min-value Max-value Unit
value

Battery pack form 3 - 4 Series

Rated discharge current - 10 15 A

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Single cell voltage 2000 - 4800 mV

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Tolerance of single cell
- ., - 20 mV
voltage
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Tolerance of total voltage - - 0.1 V
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Tolerance of current - - 3 %
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Tolerance of temperature - - 2 ℃

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Overvoltage protection - 4250 re4400 mV

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Undervoltage protection 2000 2800 - mV
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Discharge over-current
- - 15 A
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protection
Charge over-current
- - 10 A
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protection
Discharge high temperature
- 70 85 ℃
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protection
Charge high temperature
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- 65 85 ℃
protection
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Charge balance open voltage - 3900 - mV

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Discharge short circuit

22 - 100 A
protection current

Short circuit protection time 70 400 400 uS

TEL:86-22-87895805-86 FAX:86-22-87895805-87
Add：Hydratight Rd.6 F2-201，Huayuan Industrial Park,TianJin China
URL：www.d-powercore.com
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 D-powercore Co., LTD.

Discharge overload protection

8.5 - 50 A
current
Discharge overload protection
10 40 1280 mS
time

Charge voltage - - 30 V

Communication interface
3 - 5 V
voltage（UART）

Voltage sampling accuracy - 10 20 mV

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Power dissipation 35 50 80 uA

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2.2 Note
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 Customers should not modify the configured BMS parameters, please contact the

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manufacturer when you need to modify.
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 The manufacturer will provide BMS products with the BMS product configuration

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parameters specific (according to the customer demand configuration).
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
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The current BMS support is related to its own fever, and the BMS need to dissipate the heat
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when continuous high current pass through it. You could install the BMS on a heat-dissipated
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chassis, or requiring the company to install the heat sink.
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3. Communication Connection
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3.1 Network communication UART

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As optional communication, UART and LIN buses can only choose one of them, clients need
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to specify when ordering, UART communication cannot be networked because the communication
distance is short, suitable for simple point-to-point communication; the baud rate of 9600bps,
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communication links need four lines: GND, RX, TX, VCC, if the equipment for the common
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ground, that only need three lines: RX, TX, VCC.

Like LIN bus communication, the BMS can communicate with the PC software what
provided by the company via the USBSMART adapter, please refer to the "BMS User Manual of
D-powercore Co.,LTD".
In order to ensure the safe operation of BMS products, UART communication protocol is not

TEL:86-22-87895805-86 FAX:86-22-87895805-87
Add：Hydratight Rd.6 F2-201，Huayuan Industrial Park,TianJin China
URL：www.d-powercore.com
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 D-powercore Co., LTD.

provided in the specifications. If necessary, please apply to the company.

4 Operation Instructions

4.1 Battery Boot

After the battery is switched on, it can output and communicate; the boot method has the
following:
1、Charging wake-up boot, in the case of shutdown, access charger automatically boot.
2、Communication wake-up boot, in the case of shutdown, UART communication will wake up

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the battery boot

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4.2 Battery Power-off .,
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When the battery shutdown it will turn off the output, the shutdown method has the
following:
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1、When the battery current is persistently less than 200mA (configurable), no communication,
the battery shutdown after 30 minutes (configurable).
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2、Automatic shutdown when the battery short-circuit protection.

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3、Automatic shutdown after the battery undervoltage continued for 1 minute.

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4.3 Safety of Battery
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All the protective parameters should be configured strictly according to the actual battery
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condition, otherwise it may cause danger, please note the following:

1、If short-circuit current is too large, because the battery capacity is small, discharge rate is small,
the battery resistance is big or other reasons, the current that even if is completely short circuited
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with the positive and negative two levels cannot reach the short-circuit protection current, leading
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to battery damage.
2、If the parameters of over-voltage protection are too high, the battery will be caused by
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over-voltage irreversible damage.

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3、If the parameters of undervoltage protection are too low, that will make the battery result in
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irreversible damage due to overdischarge.

4、If the configuration parameters exceeds the limit parameters of BMS, that will lead to BMS
and battery damage

TEL:86-22-87895805-86 FAX:86-22-87895805-87
Add：Hydratight Rd.6 F2-201，Huayuan Industrial Park,TianJin China
URL：www.d-powercore.com
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 D-powercore Co., LTD.

5. Date Modified

V0.1: 2018.07.13

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TEL:86-22-87895805-86 FAX:86-22-87895805-87
Add：Hydratight Rd.6 F2-201，Huayuan Industrial Park,TianJin China
URL：www.d-powercore.com
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