Overview；

EJ-BC21 is a kind of high accuracy current type battery indicator, EJ-BC21 can test the voltage, current and capacity of lead-acid/lithium-ion battery, and display them with intuitive battery symbol and percentage. Users can know the state of the battery in time. EJ-BC16 has the function of memory. This battery indicator is suitable for mobile and portable equipments、ups、electric vehicles、ebike、 battery cars、balance cars、cleaning machines and so on.

Application:

EJ-BC21 is suitable for lithium batteries, lithium iron phosphate batteries, lead-acid batteries, and nickel-metal hydride batteries which working voltage is from 8V to 80V;

Working interface description:

Connect:


★ We need a shielded wire and an ordinary wire (0.3-0.75 mm²). One end of the ordinary wire connects to the positive of battery, another end connects to B+ of the sampler (anyone is ok). The B- of sampler connects to B- of the battery. P- of sampler connect to P- of output. Finally, connect the sampler to the coulometer by the shielded wire. (Notice: The diagram is not equal proportion)


Attention: Please connect as shown strictly. The sampler must be connected to the negative circuit， it is forbidden to connect to the positive circuit. If you want to extend the shielded wire,  you must use 4 lines of the same specification.

Install:


★ First，open around holes of 54.5mm on the panel of the equipment. Then install the coulometer from the front of the panel. Finally，tighten the bracket on the back. As shown below:

Parameter
Min
Type
Max
Unit
Working voltage
8.0
80.0
V
Working dissipation
10.0
12.0
mA
Standby dissipation
0.5
0.8
mA
Sleep dissipation
50.0
60.0
uA
Capacity accuracy
±2.0
％
Voltage accuracy
±2.0
％
Current accuracy
±2.0
%
Backlight on current
40.0
50.0
mA
Backlight off current
30.0
40.0
mA
Preset capacity value
0.1
999.0
Ah
Current of 50A Sampler
50.0
75.0
A
Temperature range
0
20
35
℃
Weight
70.0
g
Size
 ø59*20
mm

 

Parameter
Min
Type
Max
Unit
Working voltage
8.0
80.0
V
Working dissipation
10.0
12.0
mA
Standby dissipation
0.5
0.8
mA
Sleep dissipation
50.0
60.0
uA
Capacity accuracy
±1.0
％
Voltage accuracy
±1.0
％
Current accuracy
±1.0
%
Backlight on current
40.0
50.0
mA
Backlight off current
30.0
40.0
mA
Capacity setting value
0.1
590
Ah
Sampler working current
150.0
A
Temperature range
0
20
35
℃
Weight
135.0
g
Size
 ø59*20
mm

 

Parameter
Min
Type
Max
Unit
Working voltage
8.0
80.0
V
Working dissipation
10.0
12.0
mA
Standby dissipation
0.5
0.8
mA
Sleep dissipation
50.0
60.0
uA
Capacity accuracy
±1.0
％
Voltage accuracy
±1.0
％
Current accuracy
±1.0
%
Backlight on current
40.0
50.0
mA
Backlight off current
30.0
40.0
mA
Capacity setting value
0.1
999
Ah
Sampler working current
50.0
500.0
A
Temperature range
0
20
35
℃
Weight
65.0
g
Size
 ø59*20
mm