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Quick Details

  • Place of Origin: Guangdong, China (Mainland)
  • Brand Name: LWS
  • Model Number: LWS-10S20-034(7S)
  • Number of Layers: Other
  • Base Material: FR-4
  • Copper Thickness: 1oz
  • Board Thickness: 1.6mm
  • Min. Hole Size: 0.25mm
  • Min. Line Width: 0.1mm(Flash Gold)/0.15mm(HASL)
  • Min. Line Spacing: 0.003"
  • Surface Finishing: HASL
  • Item name: BMS 7S 20A
  • Voltage: 25.9 V
  • Charging voltage: DC:29.4V CC/CV
  • cells in series: 7 S
  • Pcb Size: L145*W59*T8.5mm
  • Application: e-bike,unicycle,powder tools,movable powder,toy's battery pack
  • Certificate: Can doCE,ROHS,ISO9001,ISO14001

Packaging & Delivery

Packaging Details Inner packing:Vaccum packing/Plastic bag.
Outer packing:Standard carton packing or packing per customer's requirements.
Delivery Time Shipped in 3-7 days after payment
Product Description
factory BMS/PCB/PCM 7S 20A for Li-ion/LiFePO4 Battery Packs
Shenzhen Li-ion Battery Bodyguard Technology Co.,LTD
PCM Specifications For 25.9V(7S) Li-ion Battery Packs
Model: LWS-10S20-034(7S)
Test item


Charging voltage
DC:29.4V CC/CV
Balance voltage for single cell


Balance current for single cell
Current consumption
≤20μ A
Maximal continuous charging current
Maximal continuous Discharging current


Over charge Protection
Over charge detection voltage for single cell
Over charge detection delay time
Over charge release voltage for single cell


Over discharge protection
Over discharge detection voltage for single cell
Over discharge detection delay time
Over discharge release voltage for single cell


Over current protection
Over current detection voltage
Over current detection current
Detection delay time 
Release condition
Cut load


Short protection
Detection condition
Exterior short circuit
Detection delay time
Release condition
Cut load
Protection circuitry(MOSFET)


Operating Temperature Range
Storage Temperature Range

Other products

We professionally manufacture lithium polymer battery and pcb for more than 5 years in China.

We have cooperated with HP,Emerson tool,NIke,WD.

Our company is established in 2013.

Product Certificates CE ROHS.

Quality control system certificates:ISO9001,ISO14001

Our Company

1.Complete products contract PCB assembly and manufacturing services

2.Circuir boards 2 to 30 layers PCB layout,fabrication, PCB assembly and box build

3.Active and passive components source is directly from original manufacturer

4.Enclosure cabinet case plastic injection molding,mental stamping,manufacture and assembly

5.High-precision 0201 size components SMT technology and lead-free

6.IC pre-program

7.Hight-precision E-Tasting

Packing & Delivery

Inner packing:Vaccum packing/Plastic bag.

Outer packing:Standard carton packing or packing per customer's requirements.

Shipped within 3-7 working days after payment

Our Service

1.after sales services

2.OEM,ODM,Customized Design

3.We can provide 24 hours service for you. We pride ourselves on our ability to custom tailor programs around our

 customers'needs. We take time to listen to your unique business needs and then set out to surpass them

Q: How do I judge what material my battery is ?

A: Please take a look at the battery body.if the normal voltage of your battery shows as 3.2V,the battery will be LiFePo4.If the normal voltage of your battery shows as 3.6V or 3.7V, the battery will be Li-ion or Li-polymer battery. you can also ask battery manufacturer the material of battery.

Q: Can I use this protection circuit board for my battery?

A: Can use this protection circuit board, or not? There are 2 questions:How much cells in series is your battery pack? The protection circuit board you need to buy must be same cells in series as your battery pack.What material is your battery? Only the LiFePo4 battery has different electric parameter from other battery, so if you need buy the protection circuit board for LiFePo4 battery , Please let us know firstly.

Q: Do we need cell balance or not?
A: The function of balance : Since battery is made of many pcs of cells in parallel and in series, the cells can't be the same as no two people in the world is the same , so can only put in group with similar performance is not consistent , which will lead to each cell voltage is not consistent as well after the completion of the charging if without balance fun

Q: Do you have Minimum Order Requirement (MOQ)?
A: No, We don’t have MOQ, Different customer have different requirement ,We can provide various capacity and size is per your requirements,Also ODM / OEM is welcome.

Q: What is your term of payment?
A: PayPal, T/T, L/C,

Transaction History of the Supplier

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Transaction Overview


Transaction Details

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Shipping Destination
Transaction Value
Transaction Date
Email to this supplier
Trade Assurance
China (Mainland)
Transaction Level:
Supplier Assessments:
8 Transactions 9,000+
The supplier’s transactions conducted via Alibaba.com in the past 6 months.
The supplier supports Trade Assurance – A free service that protects your orders from payment to delivery.
Supplier's Trade Assurance Limit: US $33,000
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