Battery equalizing device and stack equalizing device
A battery balancing and balancing technology, applied in battery circuit devices, circuit devices, charge balancing circuits, etc., can solve the problems of complex devices and high cost of battery balancing devices.
Active Publication Date: 2012-10-17
CHENGDU MONOLITHIC POWER SYST
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Problems solved by technology
However, the device used in this technical solution is too complicated, so that the cost of the battery equalization device remains high
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[0026] The specific embodiments described below represent exemplary embodiments of the invention and are merely illustrative rather than limiting in nature. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one of ordinary skill in the art that these specific details are not necessary to the present invention. In other instances, well-known circuits, materials or methods have not been described in detail in order to avoid obscuring the present invention.
[0027] In the specification, reference to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. The appearances of the term "in one embodiment" in various places in the specification are not all referring to the same embodiment, nor are they intended t...
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The invention discloses a battery equalizing device and a stack equalizing device. According to one embodiment of the invention, the battery equalizing device comprises a battery pack, an inductor, a first rectifying switch, a second rectifying switch, a third rectifying switch, a fourth rectifying switch and (N+1) controlled switches, wherein the battery pack is provided with an anode and a cathode and comprises N battery units which are connected in series, each battery unit is provided with an anode and a cathode, and N is an integer of greater than 1; the inductor is provided with a first end and a second end; the first rectifying switch is coupled between the anode of the battery pack and the first end of the inductor; the second rectifying switch is coupled between the cathode of the battery pack and the first end of the inductor; the third rectifying switch is coupled between the anode of the battery pack and the second end of the inductor; the fourth rectifying switch is coupled between the cathode of the battery pack and the second end of the inductor; and the anode and cathode of each battery unit are respectively coupled to two ends of the inductor through the controlled switches.
Description
technical field [0001] Embodiments of the present invention relate to electronic circuit arrangements, and more particularly, but not exclusively, to cell balancing devices and stack balancing devices for balancing battery cells. [0002] Background technique [0003] In recent years, more and more products use a battery pack composed of battery cells connected in series as the main power source. Due to the differences in capacity, charge and discharge, internal impedance, and temperature characteristics of each battery cell, there will be an imbalance between battery cells. This unbalanced phenomenon reduces the capacity of the entire battery pack, shortens its life, or causes excessive internal resistance. Therefore, a balancing device is employed to regulate the battery power (voltage) to ensure safety and stability. [0004] The invention patent "New Battery Equalization Circuit and Its Adjustment Method" published on June 29, 2011 (publication number: CN102111003A) d...
Claims
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IPC IPC(8): H02J7/00
CPCH02J7/0014H02J7/0016
Inventor 李桢
Owner CHENGDU MONOLITHIC POWER SYST