DALY Pack parallel BMS matching instructions(15A)

Short Description:

Pack Parallel Module+BMS=Pack Parallel BMS Realize safe parallel connection of lithium battery pack.Suitable for Li-ion 3S/LifePo4 4S/30A-60A BMS, and 5A PACK Parallel BMS.

Product Detail

Product Tags


Pack Parallel Module+BMS=Pack Parallel BMS
Realize safe parallel connection of lithium battery pack.Suitable for Li-ion 3S/LifePo4 4S/30A-60A BMS, and 5A PACK Parallel BMS.


More power in safe parallel

Active balancing technology allows the same type of lithium battery packs with the same number of series to safely connect more power in parallel.


Avoid high current shock


 Limit the Max charging current, effectively prevent high-voltage battery pack charge to low-voltage battery pack by high current shocks.

Bluetooth Smart Communication

Connect the BMS through the mobile phone Blue-tooth APP, monitor the battery data in real time, and set the relevant parameter values (monomer voltage, total voltage, temperature, power, alarm information, charge and discharge switch, etc.).


Intelligent Control Of Parallel Battery Packs

Through communication protocol and external components, the running data of parallel battery pack can be presented to the display device in real time, and related parameters can be viewed or set.


Precharge Resistor Optimized Power-on Sequence

BMS is equipped with a precharge resistor to pr-event the power-on current from being too large and short-circuit, and prevent the BMS from being damaged by the super capacitor.


Unique TVS

Prevent high pressure shock
The unique TVS realizes faster over-voltage protection, effectively clamps the surge voltage, prevents reverse voltage from impacting the MOS, and makes the overall performance of the BMS reliable and strong.


Advantages Of Parallel Lithium Battery Pack


Selected High-quality Parts

Behind every inconspicuous detail, there is quality ingenuity, and the texture can be seen everywhere.


Wide application field

DALY PACK parallel BMS has powerful functions. Suitable for various lithium battery application scenarios in power, energy storage and other fields.


Product Specification

 Easily select for parallel module.


Product Parameters

PACK parallel BMS parameters list

15a (2)

PACK Parallel BMS dimensions table

15a (1)

PACK parallel BMS wiring diagram

Please select the corresponding wiring method according to the purchased model.
Wiring method of 1A parallel module.
The 1A parallel protector has only one wire outlet, and there are 5 wires in total. It is only necessary to combine the 5 wires and connect them to the corresponding DO port of the BMS.


PACK parallel battery pack wiring diagram

1.PACK parallel protective board consists of two parts:

The BMS+parallel protector,that is,each PACK that needs parallel. The two must be included.

2.The detailed wiring method of the protective board view the wiring map of the protective board.

3.Wiring Precautions

Method 1

(the BMS and the parallel BMS module wire are not connected):After the BMS is assembled, when the parallel BMS module is connected to the BMS, first connect the parallel BMS modules P-wire to the BMS (the common port is connected to the BMS P-wire, and the separate port is connected to the BMS C- wire), and then connect B-and B+ in turn.After the wire is connected,first plug the BMS and parallel BMS module ports, then the B+ port, and plug the control signal wire to the protection board finally

Method 2

(BMS and parallel BMS module lines are connected): first plug the BMS and parallel BMS module ports, then plug into the B+ port, and finally plug into the control signal line to the BMS;

※Please strictly follow the above two methods for wiring, please operate in sequence if the wiring sequence is reversing, it will cause damage to the parallel BMS module.

4.The BMS and parallel BMS modules must be used together and can't be mixed using. Wiring should be done according to the purc-hased parallel BMS module corresponding to the current.

Corporate Mission

Innovate intelligent technology and create the green energy world.

Excellent quality and global selling

DALY has got the international certification of ISO9001 quality management system, EU CE, EU ROHS, US FCC, and Japan PSE. The products sell well in more than 130 countries and regions around the world, and more than 30 million DALY BMS have been sold.

Promising industry and bright future

As a leader in the lithium battery BMS industry, DALY BMS contributes to the implementation of the national strategy of "3060 carbon peak and carbon neutrality", and leads the intelligent development of the industry.

In 2022, DALY BMS kept on developing. The company relocated to Songshan Lake High-tech Zone, upgraded the R&D team and equipment, strengthened the system and cultural construction, optimized the brand and market management, and strove to become the leading enterprise in new energy industry.


Our Company

Dongguan Daly Electronics Co., Ltd. was established in 2015, integrating R & D, production and sales, and specilizing in the production of lithium battery protective boards, such as LiFePO4 BMS, NMC BMS, LTO BMS, which can be used to energy storage, electric vehicles, electric tools, electric wheelchairs, AGVs, and forklifts, etc. The specifications of Daly BMS are 3S - 32S, 12v-120v, and 5A-500A. Smart BMS, BT, UART, RS485, can, LCD and GPS are very popular in Europe, Asia and North America. We strive to continue to develop more high-tech BMS. Welcome to visit our company in person, and hope to establish a long-term cooperative relationship with you.

● In 2012, the dream set sail. Due to the dream of green new energy, the founder Qiu Suobing and a group of BYD engineers started their entrepreneurial journey.

● In 2015, Daly BMS was established. Seizing the market opportunity of low-speed power protection board, Daly products were emerging in the industry.

● In 2017, DALY BMS expanded the market. Taking the lead in the layout of domestic and international e-commerce platforms, DALY products were exported to more than 130 overseas countries and regions.  

● In 2018, Daly BMS focused on technological innovation. The "Little Red Board" with a unique injection technology quickly hit the market; smart BMS was promoted in a timely manner; nearly 1,000 types of boards were developed; and personalized customization was realized.

Professional Technical Support

A strong team of 100 engineers to provides professional one-to-one technical support and services. Standard questions will solve within 24h to provide customers with considerate service.


Strong Production Capacity Annual output of various types of BMS more than 10 million.

Purchase Notes


DALY company engaged in R&D, design, production, processing, sales and after-sales maintenance of Standard and smart BMS, professional manufacturers with complete industrial chain, strong technical accumulation and outstanding brand reputation, focusing on create "more advanced BMS", strictly carry out quality inspection on each product, obtain the recognition from customers around the world.
Please view and confirm the product parameters and details page information carefully before purchasing, contact with online customer service if have any doubts and questions. To make sure you are buying the correct and suitable product for your use.

Return and exchange instructions

1.Firstly, Please carefully check whether it is consistent with the ordered BMS after receiving the goods.
2.Please operate in strict accordance with the instruction manual and the guidance of customer service personnel when installing the BMS. If the BMS does not work or is damaged due to misoperation without following the instructions and customer service instructions, customer need to pay for repair or replacement.
3.please contact customer service personnel if have any questions.

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