In series connection, the positive tab of one section is connected with the negative tab of the other section (generally, there are wire connections, conductive sheet connections, direct welding of tabs, etc.), and then use the remaining independent negative tabs and positive tabs of the two batteries The ears are negative and positive of these 2 strings of battery packs. Pay attention to the insulation between the independent positive and negative ears! After the series is connected, the voltage is added (7.4V), and the capacity remains unchanged (the cell was originally a 2500mAh battery, and now it is still 2500mAh).
Even it is 2 series battery packs, it shall match both cells voltage, capacity and interior resistance. Must keep them during the limited ranges.
Let talk about the protection board(PCM), it pre-equiped with IC chip and Mosfet to protect short-circuit, over-charge, over-discharge and over current.
Ref wire & connector output info, we generally come with JST, Molex, PH pre-equipped connector. They shall be paired with the customer mainboard female connector. Of course, we also deliver bare wires to the assembly factory for soldering. Most are UL3302, UL1571 AWG wires.
In another word, we produce what you need.
Reliable & durable lithium battery & energy storage manufacturer in China with over 10 years of experience.
We will contact you within 1 working day, please pay attention to the email with the suffix “@hlcbattery.com”.