Battery module terminal voltage regulating circuit and device

Abstract

The invention relates to a battery module terminal voltage regulating circuit, which relates to the field of power supplies. The battery module terminal voltage regulating circuit comprises an alternating current rectifying unit of which the input end receives alternating current and the output end is connected with a direct current bus and is used for converting the alternating current into direct current bus voltage; a battery charging and discharging unit, wherein the first end of the battery charging and discharging unit is connected with the direct-current bus, the second end of the battery charging and discharging unit is connected with a battery module, and the battery charging and discharging unit is used for converting the direct-current bus voltage of the first end into direct-current voltage of the second end to charge the battery module, or converting the direct-current voltage of the second end into the direct-current bus voltage of the first end; and an energy-consuming discharge unit connected with the direct-current bus, wherein the battery module discharges through the battery charging and discharging unit and the energy-consuming discharge unit, so that the design is simple, and standardization can be realized.

Description

technical field [0001] The invention relates to the field of power supplies, in particular to a battery module terminal voltage regulating circuit. Background technique [0002] Large-scale series-parallel battery modules are indispensable system components in many current electrical fields, such as energy supply units for electric vehicles or energy storage units for photovoltaic inverter systems. Generally, multiple batteries are connected in series and parallel to form a battery module (module), and then multiple battery modules are connected in series and parallel to form an energy storage or power supply battery pack (package), which is used as an energy storage unit or an energy supply unit . [0003] When a battery module in the battery pack needs to be replaced, the new battery module needs to adjust its own capacity to an appropriate value before replacement to ensure that the capacity of the entire battery pack is balanced. The battery module capacity is highly c...

AI Technical Summary

Problems solved by technology

However, if it is necessary to meet the requirements of a wide voltage range and the constant discharge current can be set arbitrarily, only the DC / DC converter discharge unit 124 can be used as the discharge unit. For details, please refer to Figure 5 Shown is a schematic diagram of a battery module terminal voltage regulation circuit according to another embodiment of the prior art, but the conventional use of a DC / DC converter discharge unit for discharge often cannot meet the requirements for high current and voltage control accuracy

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