Title: How to connect 4 batteries
Among the hot topics on the Internet in the past 10 days, content related to new energy and electric vehicles has attracted much attention, especially the technical discussion about battery connection methods. This article will focus on the theme of "How to connect 4 batteries", combined with structured data, to introduce in detail the battery connection methods, precautions and FAQs.
1. Connection method of 4 batteries

There are two main ways to connect four batteries: series and parallel. The following is a comparison of the two connection methods:
| Connection method | voltage change | Capacity change | Applicable scenarios |
|---|---|---|---|
| series connection | Voltage addition | Capacity remains unchanged | Equipment requiring high voltage |
| Parallel connection | Voltage remains unchanged | Add capacity | Equipment requiring high capacity |
2. Specific connection steps
1.Series connection: Connect the positive and negative poles of 4 batteries in sequence, the final output voltage is 4 times the voltage of a single battery, and the capacity remains unchanged.
2.Parallel connection: Connect the positive poles of 4 batteries and connect the negative poles. The final output voltage remains unchanged and the capacity is 4 times the capacity of a single battery.
3. Precautions
1.Battery matching: Make sure the voltage and capacity of all batteries are the same to avoid damage caused by inconsistent parameters.
2.Connection line selection: Use wires thick enough to reduce current loss and heat generation.
3.Security protection: Pay attention to insulation when connecting to avoid short circuit or electric shock.
4. Frequently Asked Questions
| question | Answer |
|---|---|
| Can series and parallel connections be mixed? | Yes, but you need to ensure that the battery parameters are consistent and calculate the total voltage and capacity. |
| What should I do if the battery gets hot after connecting? | Check whether the connection is tight, whether the wire is too thin, or whether the battery is overloaded. |
| How to extend battery life? | Avoid over-discharge, charge regularly, and keep the battery clean and dry. |
5. Summary
The connection method of the four batteries depends on actual needs. Series connection is suitable for high-voltage equipment, and parallel connection is suitable for high-capacity equipment. Either way, you need to pay attention to battery matching, connection line selection and safety protection. Through reasonable connection and correct maintenance, the performance of the battery can be fully utilized and its service life can be extended.
I hope this article can provide you with valuable reference. If you have other questions, please leave a message in the comment area for discussion.
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