Battery Management System (BMS) 74V20S-118.4V32S Li-ion and Li-Polymer Battery

Battery Management System (BMS)  74V20S-118.4V32S Li-ion and Li-Polymer Battery

Model No.︰62.9V17S Packs

Brand Name︰BEST

Country of Origin︰China

Unit Price︰-

Minimum Order︰1000 pcs

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Product Description

Features:

1.Protection Circuit Board for 71.4V 17S 40A Li-ion and Li-polymer battery pack;

2.BMS applies for 17 cells Li-ion/Li-polymer battery pack;

3.To prevent the battery packs from overcharge,overdischarge,over current, over temperature ,short circuit ;

4.With cell balance/equilibrium function;

5.Compatible with both Li-ion and Li-Polymer cells.

6.How balancing function works? after battery pack is fully charged. PCM will detect each cell's voltage and trim higher voltage down until other cells reach the same voltage level. Therefore, it helps cells have longer service life.

(Note: the pictures or parameters in this data sheet are only for your reference, those possibly could be different from the ones you will order. Due to the upgrading of the Hardware/Firmware/Software,Characteristics subject to change without notice, for more information, please contact our technical engineers by email: tech@sunbesthk.com

 Specifications:
 

Item

Contents

Criteria

(Adjustable from software/hardware)

1

Model

BEST-####

27S~32S-35A working current

2

Voltage

Charging voltage

113.4V~134.4V

3

Current

Maximal continuous charging current

80A (adjustable from hardware)

Maximal continuous discharging current

80A (adjustable from hardware)

Current consumption

≤200μA

 

4

Overcharge Protection

Over charge detection voltage

Adjustable from software

Over charge detection delay time

Adjustable from software

Over charge release voltage

Adjustable from software

5

Over Discharge Protection

Over discharge detection voltage

Adjustable from software

Over discharge detection delay time

Adjustable from software

Over discharge release voltage

Adjustable from software

6

Over Current Protection

Over current detection voltage

Adjustable from software

Over current detection current

Adjustable from software and hardware

Detection delay time

Adjustable from software

Release condition

Adjustable from software

7

Short Circuit Protection

Detection condition

Adjustable from software

Detection delay time

Adjustable from software

Release condition

Cut load, automatically recover

8

Balance

On @ ≥50mV±5mV

OFF @ ≤30mV±5mV

Balance voltage for single cell

Adjustable from software

Balance current for single cell

Adjustable from hardware

9

Resistance

Inner resistance

≤20mΩ

10

Temperature

Single cell temperature when discharge (over temp. protection) ≥65

Adjustable from software

Single cell temperature when discharge (low temp. protection) <-40

Adjustable from software

Single cell temperature when Charge (over temp. protection) ≥50

Adjustable from software

Single cell temperature when Charge (low temp. protection) <0

Adjustable from software

11

Fuel/Gas gauge

Display with  LEDs

Thru one button to check capacity

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Self-consumption in different working modes:

·         Normal Operating Mode: 13mA typical, 18mA maximum self-consumption.

·         Sleep Mode: 200μA typical, 300μA maximum self-consumption. 

·         The system automatically back to normal operating mode from sleeping mode if current is <2A after no communication signal for 60mins.

·         The system also will be back from sleep mode to normal operating mode if any charge or discharge activity is detected or if there’s communication signal again

Voltage protection

·         As soon as one cell’s voltage exceeds the protection point, the charging process will be interrupted on the whole pack. The protection circuit returns to normal conditions as soon as all the cell’s voltage falls back to normal. Thedischarge will be allowed and the cell balancing will be activated.

         As soon as one cell’s voltage is under the protection point, the discharging process will be interrupted on the whole pack, BMS will be in energy-saving mode, The protection circuit returns to normal operation mode as soon as all the cell’s voltage charged back to normal. When BMS protected up on discharging, the charging processing is still allowed.

Current protection

Software:As soon as the discharging current exceeds the over current detection current during the detection delay time, the discharging process will be interrupted. The BMS returns to normal conditions after over current detection current released.

Hardware:As soon as the discharging current exceeds the over current detection current during the detection delay time, the discharging process will be interrupted. The BMS returns to normal conditions after over current detection current released.

ESD:Battery is protected against electrical discharges:

- 15kV air

- 8kV contact

Price Terms︰ FOB SHENZHEN

Payment Terms︰ TT/PAYPAL/WEST UNION/ESCROW

Packing︰ EXPORT CARTON BOX

Lead Time︰ 7 BUSINESS DAYS AFTER RECEIVE YOUR PAYMENT

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