Home->PCM for Li-ion/Li-Polymer Battery Packs ->For 20S~32S Packs (74V~118.4V)-> For 20S Packs (74V)

Battery Protection Circuit Module (BMS/PCM) for 20S 74V Li-ion/Li-Polymer Battery Packs

Part number: HCX-D704

Features and Benefits

1.Protection Circuit Board for 74V 20S Li-ion and Li-Polymer battery pack;

2.PCM applies for 20 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.

7.PCM comes with all the voltage detection wires and connectors.

Specifications

 

Item

Contents

Criteria (Adjustable)

    1

Model

HCX-D704

20S-42A working current

2

Voltage

Charging voltage

84V

3

Current

Maximal continuous charging current

35A/20A

Maximal continuous discharging current

35A/40A

Current consumption

≤50μA

4

Overcharge Protection

Over charge detection voltage

4.2V~4.35V(Adjustable)

Over charge detection delay time

200ms(max)

Over charge release voltage

4.0V~4.2V(Adjustable)

5

Over Discharge Protection

Over discharge detection voltage

2.3V~3.0V(Adjustable)

Over discharge detection delay time

120ms(max)

Over discharge release voltage

2.3V~3.0V(Adjustable)

6

Over Current Protection

(1st Protection)

Over current detection current / Voltage

Adjustable / 0.15±0.02V

Detection delay time

MAX20ms

Release condition

Cut load / charge to recover

7

Short Circuit Protection

Short circuit detection current

Adjustable

Detection delay time

MAX320us

Detection condition

Cut load/charge to recover

8

Balance

Balance voltage for single cell

/

Balance current for single cell

/

9

Temperature Protection

Temperature switch

YES

10

Resistance

Inner resistance

≤20mΩ

11

Temperature

Operating temperature range

0 ~ +85°C

Storage temperature range

0 ~ +85°C

12

Size (L*W*T)

L95mm*W60mm*T12mm

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