18650 Balance bms 14.8V-74V 4S-20S 45A for electric scooter lithium battery pack bms pcb circuit board manufacturer

Function

Test condition

Symbol

Test condition

Specification

Unit

Min

Typ

Max

P

R

O

T

E

C

T

I

O

N

F

U

N

C

T

I

O

N

Over charge protection

Over charge protection voltage

Vc1

At charge off

4.20

4.25

4.35

V

Over charge protection delay time

Tc1

/

0.5

1.0

3.0

S

Over charge protection release voltage

Vc2

/

4.10

4.15

4.20

V

Charging current

normal charging current

Ioc

/

/

/

50

A

Over discharge protection

Over discharge protection

voltage

Vd1

At discharge off

2.68

2.75

2.83

V

Over discharge protection delay time

Td1

/

0.5

1.0

2.0

S

Over discharge protection release voltage

Vd2

/

2.90

3.00

3.10

V

Discharge protection recovery condition

/

/

Each string of batteries is higher than the over-discharge release voltage, disconnecting the load or operating the weak current switch to recover

Over current protection

over current 1 protection  current value

Ioc1

/

  130

150

170

A

Over current 1 protection  delay time

Toc1

/

300

700

1000

mS

Discharge current release

Over current protection recovery condition

/

/

Disconnect load, automatic recovery

Discharge current

Continuous discharge current

Ioc

/

/

/

50

A

Short circuit

 short circuit protection delay time

Tshort

/

200

500

1000

uS

Short circuit protection recovery

/

/

Disconnect load, automatic recovery

Internal resistance

 discharge circuit internal resistance (mΩ)

Ron1

/

/

8

50

mΩ

Self-consumption power

Single-section self-consumption current

Icc1

/

/

20

60

uA