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Balance correction device and power storage system

A technology of balance correction and electric storage unit, which is applied in the direction of circuit devices, charge equalization circuits, battery circuit devices, etc., and can solve problems such as voltage unevenness, reduction, and inability to effectively use the available power of the electric storage unit

Active Publication Date: 2014-11-26
NEXT E SOLUTIONS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] When using a plurality of power storage units connected in series, if the voltage unevenness occurs among the power storage units, the capacity of the power storage units cannot be effectively utilized, resulting in a decrease in the usable power

Method used

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  • Balance correction device and power storage system
  • Balance correction device and power storage system
  • Balance correction device and power storage system

Examples

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Embodiment Construction

[0030] Hereinafter, the present invention will be described through embodiments of the invention, but the following embodiments do not limit the invention according to the claims. Furthermore, not all combinations of features described in the embodiments are essential features of the present invention. In addition, the embodiment has been described with reference to the drawings, but in the description of the drawings, the same or similar parts are sometimes given the same reference numerals and redundant descriptions are omitted.

[0031] figure 1 An example of the device 100 including the power storage system 110 is schematically shown. use figure 1 The configuration and operation of the device 100 and the power storage system 110 will be described. In this embodiment, the device 100 has a motor 102 and a power storage system 110 . The device 100 can also be a transportation device such as an electric car, a hybrid car, an electric motorcycle, a railway carriage, or a li...

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Abstract

Provided is a balance correction device that is stopped at an appropriate timing. The balance correction device comprises: an inductor having one end thereof electrically connected to a point of connection between one end of a first power storage cell and one end of a second power storage cell; a first switching element electrically connected between the other end of the inductor and the other end of the first power storage cell; a second switching element electrically connected between the other end of the inductor and the other end of the second power storage cell; and a control unit that supplies control signals that control the on / off operation of the first switching element and the second switching element, to the first switching element and the second switching element. The control unit obtains information indicating the voltage difference between the first power storage cell and the second power storage cell, and, if the voltage difference is smaller than a predetermined value, provides control signals such that both the first switching element and the second switching element turn off.

Description

technical field [0001] The invention relates to a balance correction device and an electric storage system. Background technique [0002] When using a plurality of power storage units connected in series, if a voltage unevenness occurs among the power storage units, the capacity of the power storage units cannot be effectively utilized, resulting in a decrease in available power. Therefore, it has been proposed to use a balance correction circuit to equalize the voltages between the storage cells (see Patent Documents 1 to 3). [0003] (Prior art literature) [0004] (patent documents) [0005] (Patent Document 1) JP-A-2006-067748 [0006] (Patent Document 2) JP-A-2008-017605 [0007] (Patent Document 3) JP-A-2009-232660 Contents of the invention [0008] Problems to be solved by the invention: [0009] In the balance correction circuit described above, it is difficult to stop the balance correction circuit in a state where the voltage difference between the storage ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/02H01M10/44
CPCH01M2010/4271H01M2010/4278H02J7/0016H01M10/44H02J2207/20H02J2310/40Y02E60/10Y02T10/70H02J7/0014
Inventor 中尾文昭
Owner NEXT E SOLUTIONS INC
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