How to stop charging when the batteries are fully charged in solar panel

Go To Last Post
10 posts / 0 new
Author
Message
#1
  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

Hi, I am planing to design electric solar panel system for my roof. solar panel will charge batteries and batteries will supply electricity to home devices.   system will charge battery vary fast in sunny days and it will take long time to charge battery in cloudy days.    

 

Battery may be damage when it will overcharge I want to prevent overcharging When one battery is fully charged, switch over to the next battery, cloudy or sunny day. 

 

How to stop charging when the batteries are fully charged in solar panel ?

Last Edited: Mon. May 11, 2020 - 04:30 AM
  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

I STRONGLY suggest you read up on how solar arrays for rooftops and their battery systems work BEFORE you try this yourself.

 

ansh11 wrote:
How to stop charging when the batteries are fully charged in solar panel ?

What kind of battery(s) are you going to use?  SLA? LA? Li-ION?  Each type has it's own specific charging system.

 

Modern day solar panel systems have a controller/inverter for all of this.  IT's not something for beginners to take on.

 

It might be in your best interest to use off the shelf components should you plan on going forward with this.

 

JIm

I would rather attempt something great and fail, than attempt nothing and succeed - Fortune Cookie

 

"The critical shortage here is not stuff, but time." - Johan Ekdahl

 

"Step N is required before you can do step N+1!" - ka7ehk

 

"If you want a career with a known path - become an undertaker. Dead people don't sue!" - Kartman

"Why is there a "Highway to Hell" and only a "Stairway to Heaven"? A prediction of the expected traffic load?"  - Lee "theusch"

 

Speak sweetly. It makes your words easier to digest when at a later date you have to eat them ;-)  - Source Unknown

Please Read: Code-of-Conduct

Atmel Studio6.2/AS7, DipTrace, Quartus, MPLAB, RSLogix user

  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

Start small, make a setup that will charge a 50AHr battery with a 50 to 100W PV panel.  Have it run some lights in the yard (or an R-Pi with WiFi), if that works, then scale up. It is probably a good idea to have a few different systems since you will have no idea of there reliability. The dollars lost are less as you learn what works and what does not if you start small.

 

update: This shows how I turn off the Alternat (PV) power on one of my projects. It has been tested somewhat on the bench but I have some more software to do before I put it with a PV and battery in the yard. The alternat power flows through two PMOS devices, one with its drain facing the panel and the other facing the main power (battery). Between the PMOS devices, specifically, their sources is a sense resistor to measure input current. I don't care to go into the details but have found that to be a safe location to measure from. I can connect the PV backward or the battery backward, I have proven to myself numerous times that I need that protection.

 

 

This link has more info (a BOM and ilk), the board itself has known errors, but with some hacks, I am going to test more stuff as is.

 

https://github.com/epccs/Gravimetric/tree/master/Hardware

 

 

my projects: https://github.com/epccs

Debugging is harder than programming - don’t write code you can’t debug! https://www.avrfreaks.net/forum/help-it-doesnt-work

Last Edited: Mon. May 11, 2020 - 06:03 AM
  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

There are chips designed to do this - look at places lime Analog Devices (formerly Linear Technology), Texas Instruments, Maxim, et al.

 

As Jim suggests, it depends on the type of battery. There is loads of information on this - google terms like "Battery Management", "Charge Termination", etc.

Application Notes, White Papers, etc,  from the above-mentioned will also have good information.

 

Lots of battery information here:  https://batteryuniversity.com/

 

For solar charging, you should also google "Maximum Power Point Tracking" (MPPT)

 

https://en.wikipedia.org/wiki/Maximum_power_point_tracking

 

 

 

 

Top Tips:

  1. How to properly post source code - see: https://www.avrfreaks.net/comment... - also how to properly include images/pictures
  2. "Garbage" characters on a serial terminal are (almost?) invariably due to wrong baud rate - see: https://learn.sparkfun.com/tutorials/serial-communication
  3. Wrong baud rate is usually due to not running at the speed you thought; check by blinking a LED to see if you get the speed you expected
  4. Difference between a crystal, and a crystal oscillatorhttps://www.avrfreaks.net/comment...
  5. When your question is resolved, mark the solution: https://www.avrfreaks.net/comment...
  6. Beginner's "Getting Started" tips: https://www.avrfreaks.net/comment...
  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

ansh11 wrote:
Battery may be damage when it will overcharge I want to prevent overcharging

As EastCoast Jim said, it will depend on what type of battery bank you want to use.

 

ansh11 wrote:
When one battery is fully charged, switch over to the next battery

Normally one uses a battery bank, were the batteries are in parallel*, so all charge at the same time.

 

* or in a string of series connected batteries for a higher voltage, or a combination of series/parallel to provide a higher voltage and current capacity.

Tell us more about your solar project.

 

Jim

My company makes and sells solar chargers.

 

 

 

 

 

  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

The solar controller is called the solar charge and discharge controller, which is used in the solar power generation system to control the charging of the battery by multiple solar cell arrays and the automatic control equipment of the battery to supply power to the load of the solar inverter. It regulates and controls the charging and discharging conditions of the battery, and controls the power output of the solar cell modules and the battery to the load according to the power supply demand of the load. It is the core control part of the whole photovoltaic power supply system.

Function:

The basic function of the solar charging and discharging controller is to control the battery voltage and turn on the circuit. In addition, when the battery voltage rises to a certain degree, the battery will stop charging. The old version of the controller mechanically completes the opening or closing of the control circuit, stopping or starting the power supply to the battery.
Controllers are used in most photovoltaic systems to protect the battery from overcharging or over discharging. Overcharging can cause the electrolyte in the battery to vaporize, causing a fault, and overcharging can cause premature battery failure. Overcharge and over discharge may damage the load. Therefore, the controller is one of the core components of the photovoltaic power generation System and the main part of the Balance of System.
In simple terms, the functions of the solar controller can be divided into:
1. Power regulation function;
2. Communication functions:

a. Simple indicator function;

b. Protocol communication functions such as RS485 Ethernet, wireless and other forms of background management;
3. Perfect protection function: electrical protection reverse connection, short circuit, over current, etc

 

Some special batteries were collected.
From 8 mm to as thin as 0.4 mm, 6 mm to 50 mm in width, which smaller than your fingernail!
Batteries of all shapes are possible: http://bit.ly/2IsAqAs
Smart wearable battery: http://bit.ly/38vxwVW
ultra-thin battery: http://bit.ly/39vRyAZ curved battery: http://bit.ly/2xjB29h round battery: http://bit.ly/2Tvl3gU triangle battery: http://bit.ly/38BiLRS hexagon battery http://bit.ly/2PV7llk ultra narrow battery: http://bit.ly/2TDy2vG c shape battery: http://bit.ly/2TN138e d shape battery: http://bit.ly/32VVokJ polygonal battery: http://bit.ly/2TtbA9O rectangle battery: http://bit.ly/2xijRoy GPS:http://bit.ly/32XVJTI smart ring battery: http://bit.ly/2TJ0rAK medical battery: http://bit.ly/38vwhWM Bluetooth headset battery: http://bit.ly/32ZLHBv smartwatch battery: http://bit.ly/2TwsJiM
IOT: https://bit.ly/2SNYOlF

Last Edited: Tue. May 19, 2020 - 02:01 AM
  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

Burke-Smith are you selling stuff? If so post in the Marketplace forum but BE CAREFUL pushing stuff may get you banned.

John Samperi

Ampertronics Pty. Ltd.

www.ampertronics.com.au

* Electronic Design * Custom Products * Contract Assembly

  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

Burke-Smith aka Shenzhen Grepow Battery Co  Of course he/they are selling batteries.

Ross McKenzie ValuSoft Melbourne Australia

  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

and he's posted another one here:  https://community.atmel.com/forum/can-you-replace-bluetooth-headset-battery - clearly spam

 

frown

Top Tips:

  1. How to properly post source code - see: https://www.avrfreaks.net/comment... - also how to properly include images/pictures
  2. "Garbage" characters on a serial terminal are (almost?) invariably due to wrong baud rate - see: https://learn.sparkfun.com/tutorials/serial-communication
  3. Wrong baud rate is usually due to not running at the speed you thought; check by blinking a LED to see if you get the speed you expected
  4. Difference between a crystal, and a crystal oscillatorhttps://www.avrfreaks.net/comment...
  5. When your question is resolved, mark the solution: https://www.avrfreaks.net/comment...
  6. Beginner's "Getting Started" tips: https://www.avrfreaks.net/comment...
  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

I saw that one at the same time and posted the same warning, there haven't been anymore posts.

John Samperi

Ampertronics Pty. Ltd.

www.ampertronics.com.au

* Electronic Design * Custom Products * Contract Assembly