Battery pack voltage equalization control circuit and battery management equipment

Abstract

The invention discloses a battery pack voltage equalization control circuit and battery management equipment. The battery pack voltage equalization control circuit comprises a storage battery pack, a master controller, a battery voltage detection circuit and a battery pack voltage equalization circuit, wherein the battery voltage detection circuit is connected with positive and negative electrodes of each storage battery and a main controller respectively, detects a voltage of each storage battery and outputs detected voltage signal to the main controller; the main controller compares the voltage signals, and outputs an equalization control signal to the battery pack voltage equalization circuit when a difference value between two voltage signal values is greater than a preset reference value; and the battery pack voltage equalization circuit is connected with the storage battery pack and the main controller respectively, and carries out charging equalization or discharging equalization on the storage batteries which require charging equalization or discharging equalization in the storage battery pack according to the equalization control signal. According to the battery pack voltage equalization control circuit, the consistency of the storage battery pack can be kept; the charging and discharging utilization efficiency of the storage battery pack is improved; and meanwhile, the service lifetime of the storage battery pack can be prolonged.

Description

technical field [0001] The present invention relates to the technical field of battery management, and more particularly, to a battery pack voltage equalization control circuit and a battery management device. Background technique [0002] Since the voltage of a single battery is limited by the electrode material, the battery voltage will only change within a certain range during the charging and discharging process, so when using the battery, usually multiple batteries are used in series, which can increase the power supply voltage; but due to During the manufacturing process of the battery, it is impossible to keep the same exact sameness. Due to the differences in process, material and other factors, there will be certain differences in the parameters such as voltage, internal resistance, and charge of the battery. These differences are the inconsistency of battery components. Without management, in the process of recycling, due to different factors such as battery electr...

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Problems solved by technology

[0007] The technical problem to be solved by the present invention is that, in view of the above-mentioned energy-consumption balancing strategy in the prior art, it can only balance the batteries with high capacity, but cannot make full use of the battery pack, the control of the energy transfer balancing strategy is complicated, and the defects of large energy loss are provided. A battery pack voltage equalization control circuit and battery management equipment

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