Transformer-based battery pack voltage equalization circuit
A voltage equalization circuit and voltage equalization technology, applied in the direction of charge equalization circuit, battery circuit device, circuit device, etc., can solve the problems of unfavorable energy saving and environmental protection, heating and heating of battery pack, high heat dissipation requirements of battery pack, etc.
Pending Publication Date: 2018-09-21
厦门芯阳科技股份有限公司
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Problems solved by technology
However, excess power consumed by resistors will lead to local heating of the battery pack. The heat dissipation requirements for the battery pack are high, and the way to achieve balance through resistor consumption is a waste of battery power, which is not conducive to energy saving and environmental protection.
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[0034] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0035] "First", "second" and similar words used in the embodiments of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "One end", "the other end" and other similar words only indicate that the orientation or positional relationship of the device or element is based on t...
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The invention provides a transformer-based battery pack voltage equalization circuit. The device comprises a battery pack and a voltage equalization module; the battery pack includes a plurality of unit cells connected in series; the voltage equalization module includes a voltage equalization unit of the same number as the single battery; each voltage equalization unit includes a transformer and aswitching circuit; the transformer includes a first primary winding, a second primary winding, and a secondary winding; the different end of the first primary winding and the same end of the second primary winding are alternatingly conducted to the negative electrode of the corresponding single cell through the switching circuit; the secondary windings of the transformers in each voltage equalization unit are connected in parallel. The transformer-based battery pack voltage equalization circuit is directed to the voltage difference of each single battery in the process of charging and discharging the battery pack, achieving automatic voltage balancing in real time to ensure low voltage single cells can get isolated and safe charging of other high voltage single cells, and achieving low-loss, high-efficiency voltage equalization.
Description
technical field [0001] The invention relates to the technical field of battery circuits, in particular to a battery pack voltage equalization circuit based on a transformer. Background technique [0002] Because of the limited capacity and voltage of a single battery, it is often necessary to connect multiple single batteries in series to form a battery pack with relatively high voltage and relatively large capacity. During the use of series battery packs, due to the individual capacity differences caused by factors such as the manufacturing process of each single battery, the battery with small capacity and poor performance will be overcharged when charging, and the battery with small capacity and poor performance will be overcharged when discharging. The battery will produce over-discharge phenomenon again; there is a great potential safety hazard, and the service life of the battery pack will be shortened. [0003] In order to solve the problem caused by the difference b...
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Login to View More IPC IPC(8): H02J7/00
CPCH02J7/0019Y02E60/10
Inventor 刘双春王志勇魏肃柴智黄志强刘全喜
Owner 厦门芯阳科技股份有限公司