Battery pack balance control circuit and power chip

Abstract

The invention discloses a battery group balance control circuit and a power supply chip. The battery group is charged and discharged alternately under the control of time sequence, so as to realize the charging and discharging of each battery in a short time, thus playing the role of battery repair. The power supply chip provided by the present invention can be used for cascade application of multiple strings of battery packs. In the application of N strings of batteries, a total of N-1 power supply chips are needed, and the electric energy can be transferred between two adjacent strings of batteries.

Description

technical field [0001] The invention relates to the technical field of power chips, in particular to a battery pack equalization control circuit and a power chip. Background technique [0002] Rechargeable batteries are favored by more and more people because they can be reused, are relatively friendly to the environment, and have low long-term costs. However, rechargeable batteries have very high requirements for charging and discharging. Overcharging and overdischarging will have a great impact on the life of the battery. At the same time, the elimination of batteries will also cause certain environmental pressure. [0003] When the batteries are connected in series to form a battery pack, affected by the consistency of the batteries and the initial state of the batteries, when charging or discharging multiple strings of batteries, if there is no intervention, individual batteries will inevitably be overcharged or overdischarged. The solution to this problem is balance, w...

AI Technical Summary

Problems solved by technology

Passive equalization uses resistance devices to discharge the battery with too high voltage. During the discharge process, the electric energy is consumed in the form of heat; the disadvantage is that on the one hand, it causes energy loss, and on the other hand, the balanced current cannot be increased (balanced current Large, the power loss is large, and the heat generated by the loss cannot be dissipated in time, which affects the reliability of the battery)

After a certain number of charging and discharging of the battery, the polar plate of the battery will appear polarized. On the one hand, the polarization will cause the capacity of the battery to decrease, and on the other hand, there will be safety hazards.

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