Series Battery Wiring Diagram

By | June 6, 2022



Exploring Series Battery Wiring Diagrams for Ambitious DIY Projects



There are a variety of different wiring diagrams for series-connected batteries that are important to consider when creating ambitious DIY projects. Whether you’re powering remote radios, automating energy turning or creating power packs, you need to understand the configuration of your battery connections properly. As with any project, a comprehensive series battery wiring diagram is key to success.



In this article, we explore the techniques and practical considerations behind series battery wiring diagrams. Let's dive in!



What Is a Series Connection?



First of all, let's quickly define what a series connection is. A series connection links two or more batteries in a manner where the positive terminal of one battery is wired to the negative terminal on the other. This links the voltage of the two batteries together, to give a total value equal too both batteries combined. This type of connection is also known as a ‘string’.



The reason a series connection is attractive is that it effectively doubles the capacity of the battery. This is because if both batteries are mature (meaning they have a full charge), their combined rating will be double their individual ratings. This type of arrangement is often used in camper vans, boats and other applications where more power than available from a single battery is needed.



Types of Battery Connections Explained



There are several types of series connected batteries to choose from depending on your particular needs. The most common types are:





  • 4 cell lead acid battery pack

  • 7 cell lead acid battery pack

  • Nickel cadmium battery

  • Lithium ion battery pack



For any of these types of series connected batteries, your wiring diagram should include the following information:




  • Length of wire used

  • Current required to charge the battery

  • Type of wire used

  • Order of each battery connection

  • Diode orientation



Once you have determined the type of connection and the number of batteries used, you can then draw up a series battery wiring diagram. It’s important to ensure that you follow the correct procedures and observe safety rules when creating a wiring diagram so that there are no chance of potential wiring problems.



Safety Rules for Series Battery Connections



When creating a series battery connection, you must adhere to certain safety rules. You should use the same size and type of wire for each battery and make sure the teminals are secure. The terminals should also match exactly with the ones in your wiring diagram. Additionally, although series connections are used to increase the voltage, they will not increase the current. This means that if the overall current requirements of your project exceed the capabilities of one battery, you’ll need to start looking at parallel connections instead.



For any type of battery, you should never connect the terminals of two different batteries together without any load. Never do this with the positive and negative terminals of two different batteries connected to each other. Doing this could cause a spark and potentially create a fire hazard.



Using Series Battery Wiring Diagrams Effectively



By using a thorough series battery wiring diagram, you can ensure that any ambitious DIY project is installed correctly and safely. Once you have learnt the basics of creating a safe wiring diagram, you can be confident in your new setup. The advantages of understanding series battery wiring diagrams cannot be underestimated – they’re the key to success for any ambitious DIYer.


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