What Is Parallel Battery Connection

Parallel battery connection refers to a circuit connection method that connects the positive and negative terminals of multiple batteries to each other.
 

1. Core features:

• Voltage remains unchanged: The total voltage is equal to the voltage of a single battery (such as 12V after two 12V batteries are connected in parallel).
• Capacity superposition: The total capacity is the sum of the capacities of each battery (such as a total capacity of 200Ah after two 100Ah batteries are connected in parallel).

2. Advantages:

• Extended device usage time (increased capacity), suitable for scenarios that require long-term power supply but constant voltage (such as solar energy storage systems, UPS backup power sources).

3. Matters needing attention:

• It is necessary to ensure that the model, capacity, and age of each battery are consistent, in order to avoid uneven charging and discharging due to performance differences and shorten their lifespan.
• When connecting, use thick wires to reduce internal resistance and provide insulation protection.
• This connection method is widely used in devices that require high-capacity and low-voltage power supplies, complementing the characteristic of "increasing voltage in series while maintaining constant capacity".