Energy balance control device, battery system and energy balance control method thereof

Abstract

The invention discloses an energy balance control device, a battery system and an energy balance control method of the battery system. The device comprises a selection unit, a conversion unit and a transformer, wherein the selection unit is used for gating one path of battery cell needing energy balance control in a battery cell group; the conversion unit is used for realizing a first energy conversion process between the gated battery cell and a storage battery; and the transformer is used for realizing a second energy conversion process between the gated battery cell and the storage battery.According to the scheme, the problem that the number of secondary windings of the transformer needs to be increased along with the increase of battery cells in the battery equalization technology, and consequently the implementation difficulty of the transformer is high can be solved, and the effect that the implementation difficulty of the transformer is reduced due to the fact that the number of the secondary windings of the transformer does not need to be increased along with the increase of the battery cells is achieved.

Description

technical field [0001] The invention belongs to the field of battery technology, and in particular relates to an energy balance control device, a battery system and an energy balance control method thereof, and in particular to a battery management system (BATTERY MANAGEMENT SYSTEM, BMS) active balance topology, and a battery with the battery management system system, and an energy balance control method for the battery system. Background technique [0002] With the development of the economy, the use of fossil fuels such as petroleum continues to increase, leading to increasingly serious environmental problems. Finding less polluting and clean energy is the main way to solve environmental problems. Replacing fuel vehicles with electric vehicles is the main trend of today's social development, and batteries are indispensable as energy storage devices for electric vehicles. The performance of batteries is directly related to the performance of electric vehicles, and also det...

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Problems solved by technology

[0004] The purpose of the present invention is to address the above defects, to provide an energy balance control device, a battery system and an energy balance control method thereof, so as to solve the problem that the secondary winding of the transformer in the battery balance technology needs to increase with the increase of battery cores, so that the transformer The realization of the problem is relatively difficult, so as to avoid the need for the secondary winding of the transformer to increase with the increase of the battery core, so that the difficulty of the realization of the transformer is reduced.

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