Elektor Team
About the article

Lead-acid battery activator 0-30V

Also shows the battery quality

LABSPROJECT
Based on a Labs project | August 2016 | Find it here
Lead-acid battery activator 0-30V
A well-known electronics store has been selling a very simple lead-acid battery activator for many years. Although I can't prove it, my lead-acid batteries do seem to last longer since I started using the activator. The principle behind this circuit is very simple. The battery is loaded with a current of about 100 A for a period of 100 µs, which is repeated every 30 seconds. But this circuit is capable of more, which we'll show you in this article.
Products
Relevant websites
Extra info / Update
Tags
Hobby & modeling
Batteries, test & measurement
Level
Advanced
Time taken
About 3 hours
Required tools
No special tools are required
Cost
About € 60
Component list
In the Store
160064-1 PCB
160064-41 Programmed controller
160064-71 Kit of parts
120061-74 2x16 character LCD
Parts List
Resistors:
(0.25W, 250 V, unless otherwise stated)
R1,R25 = 10 k
R2...R19 = 22 k, 1%, 0,6 W, 350 V
R20...R22 = 1 k
R23,R24 = 560 Ohm
R27 = 50 mOhm, 1 W, MPC75
R26 = 390 Ohm
P1 = 10 k, preset
Capacitors:
C1 = 2.2 µ, 50 V, 2 mm pitch, 5x11 mm
C2,C8 = 10 µ, 50 V, 2 mm pitch, 5x11 mm
C3...C6 = 100 n, 50 V, X7R, 5.08 mm pitch
Semiconductors:
D1,D2,D7,D8 = BAT85
D3...D6 = BZX79-C2V4
D9 = SR1204
D10 = BZX55C15V
LED1 = led, blue, 3 mm
LED2 = led, red, 3 mm
LED3 = led, yellow, 3 mm
LED4 = led, green, 3 mm
T1 = IRLB8721PBF
IC1 = LP2950ACZ-5.0
IC2 = PIC16F1847-I/P, programmed (EPS 160064-41)
IC3 = RO-0515S/P
IC4 = VO615A
Miscellaneous:
F1 = PCB-mount fuse holder + fuse (see text)
LCD1 = LCD, 2x16 characters, EPS 120061-74
LCD1 = 16-pin header, vertical, 0.1” pitch
LCD1 = 16-pin header bus, vertical
K1,K2 = 2-way PCB screw terminal, 0.2” pitch
K3 = 2-way PCB screw terminal, 0.3” pitch
JP1...JP4 = 3-way header, vertical, 0.1” pitch
JP5 = 2-way header, vertical, 0.1” pitch
Jumper for JP5
2x5 header bus, vertical for JP1...JP5
IC socket, DIP-18, for IC2
PCB 160064-1 v2.1
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