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Balance does not work: Many people believe that batteries work in the middle and later stages of using balance. The actual battery pack used in the middle and later stages has poor capacity due to different battery capacity losses, and the balance protection board cannot compensate for the battery capacity. The voltage of each string of battery packs on the surface is consistent, but due to inconsistent capacity, The lower is often the single string discharge protection and overcharging protection of batteries with charging and discharging capabilities, so the battery's capacity is in the single string of low capacity batteries.

The situation where balance cannot be used: Many people believe that a battery pack has a useful purpose when used in the middle and later stages. In fact, when a battery pack is used in the middle and later stages, due to the different capacity losses of each battery cell, there is a capacity difference. Balancing with a protective plate cannot compensate for the capacity of the battery cells. On the surface, the voltage of each string of the battery pack is consistent, but due to the inconsistent capacity, During charging and discharging, low capacity single string cells are often used for over discharge protection and over charge protection, so the capacity of the battery pack is reflected by low capacity single string cells.

Passive equalization generally discharges batteries with higher voltage through resistance discharge, releasing energy in the form of heat to gain more charging time for other batteries. In this way, the power of the entire system is constrained by the battery with the least capacity. During the charging process, lithium-ion batteries generally have a charging upper limit protection voltage value. When a series of batteries reaches this voltage value, the lithium-ion battery protection board will cut off the charging circuit and stop charging. If the voltage during charging exceeds this value, commonly known as overcharging, lithium-ion batteries may burn or explode.

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