Important: Use custom search function to get better results from our thousands of pages

Use " " for compulsory search eg:"electronics seminar" , use -" " for filter something eg: "electronics seminar" -"/tag/" (used for exclude results from tag pages)
Ask More Info Of  A Seminar Ask More Info Of A Project Post Reply  Follow us on Twitter
13-05-2011, 03:39 PM
Post: #1
Constant-Current Battery Charger
There are many ways of batterycharging but constant-currentcharging, in particular, is apopular method for lead-acid and Ni-Cd batteries. In this circuit, the batteryis charged with a constant current thatis generally one-tenth of the batterycapacity in ampere-hours. So for a4.5Ah battery, constant charging currentwould be 450 mA.This battery charger has the followingfeatures:1. It can charge 6V, 9V and 12V batteries.Batteries rated at other voltagescan be charged by changing the valuesof zener diodes ZD1 and ZD2.2. Constant current can be set asper the battery capacity by using apotmeter and multimeter in series withthe battery.3. Once the battery is fully charged,it will attain certain voltage level (e.g.13.5-14.2V in the case of a 12V battery),give indication and the charger willswitch off automatically. You need notremove the battery from the circuit.4. If the battery is discharged belowa limit, it will give deep-dischargeindication.5. Quiescent current is less than 5mA and mostly due to zeners.6. DC source voltage (VCC) rangesfrom 9V to 24V.7. The charger is short-circuit protected.D1 is a low-forward-drop schottkydiode SB560 having peak reverse voltage(PRV) of 60V at 5A or a 1N5822diode having 40V PRV at 3A. Normally,the minimum DC source voltageshould be ‘D1 drop+Full chargedbattery voltage+VDSS+ R2 drop,’ whichis approximately ‘Full charged batteryvoltage+5V.’ For example, if we takefull-charge voltage as 14V for a 12Vbattery, the source voltage should be14+5=19V.For the sake of simplicity, this constant-current battery charger circuit isdivided into three sections: constantcurrentsource, overcharge protectionand deep-discharge protection sections.The constant-current source isbuilt around MOSFET T5, transistorT1, diodes D1 and D2, resistors R1, R2,R10 and R11, and potmeter VR1. DiodeD2 is a low-temperature-coefficient,highly stable reference diode LM236-5.LM336-5 can also be used with reducedoperating temperature range of 0 to+70°C. Gate-source voltage (VGS) of T5is set by adjusting VR1 slightly above4V. By setting VGS, charging currentcan be fixed depending on the batterycapacity.

Rating Constant-Current Battery Charger Options
Share Constant-Current Battery Charger To Your Friends :- Seminar Topics Bookmark
Post Reply 

Marked Categories : battery charger, detail information of constant current better charger, ppt on constant current battery charger, uses of constant current battery charger using lm 236, constant current battery charger ppt, battery c harger, electronics for you constant current battery charger project, www constant current bettary cherger project report, http ebatterychargers com universal battery charger 45 html, searches related to constant current battery charger, latest version of constant current battery charger, automatic constant current charger project, project on constant current battery charger, constant current source, constant current battery charger project,

Quick Reply
Type your reply to this message here.

Image Verification
Image Verification
(case insensitive)
Please enter the text within the image on the left in to the text box below. This process is used to prevent automated posts.

Possibly Related Threads...
Thread: Author Replies: Views: Last Post
  COIN BASED MOBILE CHARGER full report seminar class 34 31,507 25-03-2015 03:55 PM
Last Post: Guest
  OVER CURRENT PROTECTION RELAY USING PIC MICRO seminar tips 4 1,973 08-02-2015 09:50 PM
Last Post: marcheto1923
  Competitive Analysis of SF sonic battery in terms of direct retail outlet, Garage and seminar code 1 380 04-02-2015 05:05 PM
Last Post: Guest
  Optimal Positioning of Superconducting Fault Current Limiters for the Smart Grid Ap seminar code 1 185 09-01-2015 03:20 PM
Last Post: Guest
  residual current device subine 0 91 18-11-2014 04:30 PM
Last Post: subine
  shaping current waveform subine 0 57 17-11-2014 03:56 PM
Last Post: subine
  microprocessor based over current relay with inverse time characteristics subine 0 105 17-11-2014 02:33 PM
Last Post: subine
  solar battery charge controller and evaluating pv characteristic subine 0 83 17-11-2014 02:31 PM
Last Post: subine
  Mitigation of harmonics using instantaneous active and reactive current component(id- seminar code 0 41 10-11-2014 09:56 AM
Last Post: seminar code
Last Post: seminar code
This Page May Contain What is Constant-Current Battery Charger And Latest Information/News About Constant-Current Battery Charger,If Not ...Use Search to get more info about Constant-Current Battery Charger Or Ask Here