Free Shipping In All Countries
Cart 0
 Charging Voltage 54.6V With balance

3.7V Battery pack 20S 72V E-bike Li ion battery bms 18650 BMS 30A 40A 50A 60A battery BMS

Regular price $35.99 Sale price $115.99 Unit price per
Tax included. Shipping calculated at checkout.

Product Description :

3.7V Battery pack 20S 72V E-bike Li ion battery bms 18650 BMS 30A 40A 50A 60A battery BMS Charging Voltage 54.6V With balance

Model: DL20S (3.7V rated Li-ION Battery not for 3.2V Rated LiFePO4)

common Version : common port for charge/discharge 
separate Version : separate port for charge/discharge

We can customize any PCB from 1S to 30S lithium batteries with different current.


1. Overview

DL20S72V30/40A/50A/60A bms is used for 20 series 72V battery pack.

We can design it for various lithium batteries like LiFepo4, LiMn2O4, and Li-polymer etc.

The main functions are: over charge protection, over discharge protection, over current protection, short-circuit protection, temperature protection etc.

According to the customer request we can develop PCM in different sizes and structures.

BMS manufactured by  high quality Mos and IC imported . Keep your battery long cycle serivce life time.


2. Advantage

◆Use top quality (A-level) protective integrated circuit IC, from the solution of Seiko of Japan.

◆Strong load ability, constant discharge current 30/40A/50A/60A , use high voltage resistance, low inner

resistance power Mosfet. The heat sink will greatly help cooling.

◆IC itself has power balancing function. The circuit is simple and reliable.

◆Typical voltage detection for each cell. So each battery will be prevented over charged or over discharged. Over current and short circuit protection function is very reliable.Long time short circuit of the load won’t affect the PCB and the battery.Temperature protection during charging and discharging.

◆Extreme low power consumption. The consumption of the whole device is less than 50uA.

◆PCB use high anti-corrosion, high water resistance, high impedance ESD conformal Coating.



Parameters for li-ion 20S 72V BMS
  Description Specification Unite Remarks
30A 40A 50A 60A
Discharge continue discharge current 30 40 50 60 A  
Discharge Peak current 65 165 180 180 A  
Over current protection  65 165 180 180 A  
Charge Charge voltage 84 V  
Charge current 20 30 40 50 A Charge current 8A in separate port
Over charge protection Over charge detect voltage 4.25±0.025 V  
Over charge protection delay 0.5 S  
Over charge release voltage 4.15±0.05 V  
Balance Balance detection voltage 4.18 V  
Balance release voltage 4.18 V  
Balance current 30 mA Balance current30±5mA
Discharge protection Over discharge detect voltage 2.7±0.05 V  
Over discharge detect delay 0.5 S  
Over discharge release voltage 3.0±0.05 V  
Over current protection Over current detect voltage 150 mV  
Over current detect delay 9 MS  
Over current protection release conditions Off load    
Short circuit protection Short circuit protection conditions short circuit with extermal load    
Short circuit detection delay 250 uS  
Short circuit protection release conditions Off load    
Temp Protection Temp Protection NA As Requirement
Inner resistance Main circuit conductive inner resistance ≤10  
Self electricity consume Working current ≤40 uA  
Sleeping current(Battery in overdischarge) ≤20 uA  
Working Temp Temp range  -30to80


Accessory Type: Battery Accessories
Model Number: DL-20S
Accessory Type: Battery Accessories
Model Number: DL20S
Brand Name: DALY
Applications: 3.7V lithium battery rated
Battery series: 20S
Over charge protection: Yes
Over discharge voltage: Yes
Short circuit protection: Yes
Balance function: Yes


Shipping Timeframe:

US, Australia, UK, Germany, Canada: 3~5 weeks Other European Countries: 3~5 Weeks. Items will be shipped in within 4 days after payment is received. The Parcel Status Can Be Tracked 8-10 Days Later After Sending.If You Don't Receive the Item On Time, Please Take Time to Contact us.


We're not responsible for any custom duty or import tax.

 If you are not satisfied with the item you received, Please contact us for parcel return & payment refund.The returned parcel shouldbe sentback in original package in14days after the receipt.But you have to pay for the returned.We strive for 100% customer satisfaction on every sale we complete.


We are family owned business, and we have served thousands of customers from all over the world. Our products are direct from factory, so we can provide quality items at very competitive price.


If you have any question, please contact us by the contact seller now button, leave us message or send us emails. Most emails are responded within 24 business hours.

Share this Product