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Battery stack balancing apparatus

一种平衡设备、电池堆的技术，应用在电池堆的设备领域，能够解决电压差、浪费电力、消耗电力等问题，达到数量减小的效果

Active Publication Date: 2017-12-05
LG ENERGY SOLUTION LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, the conventional passive balancing technique consumes power by using resistors for balancing and thus wastes power, and the conventional active balancing technique using capacitors should repeatedly perform switching operations to switch between battery cells and capacitors. creates a voltage difference and therefore requires a significant amount of time for balancing

Method used

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Embodiment Construction

[0049] Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. Before describing, it should be understood that the terms used in the specification and appended claims should not be construed as being limited to common and dictionary meanings, but based on the inventors being allowed to define the terms appropriately for the best explanation. The principles are explained based on the meanings and concepts corresponding to the technical aspects of the present disclosure.

[0050] Therefore, the description given here is only for illustrative preferred examples, and is not intended to limit the scope of the present disclosure, so it should be understood that other equivalents and modifications can be achieved without departing from the scope of the present disclosure.

[0051] In the following description of the present disclosure, when it may make the subject of the present disclosure unclear, a detailed de...

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Abstract

The present invention provides a balancing apparatus for allowing quick electric power transmission while balancing without wasting electric power. The battery stack balancing apparatus, which balances a battery stack comprising serially connected multiple battery modules, according to one aspect of the present invention comprises: a serial resonant circuit comprising a first capacitor and a first inductor serially connected to the first capacitor; a polarity-changing circuit, which comprises a second inductor and a polarity-changing switch serially connected to the second inductor and selectively turned on or off and is parallelly connected to the first capacitor; multiple transmission lines having one end respectively and electrically connected to multiple nodes, which are formed respectively at the low-potential end of the battery stack, at the high-potential end of the battery stack, and between the serially connected multiple battery modules, and having the other end connected to the serial resonant circuit; multiple transmission switches installed respectively on the multiple transmission lines and selectively turned on or off; and a control unit for controlling the multiple transmission switches and the polarity-changing switch.

Description

Technical field [0001] The present disclosure relates to a battery balancing technology, and more particularly, to an apparatus for balancing a battery stack including two or more battery modules by using a resonance circuit. [0002] This application claims priority from Korean Patent Application No. 10-2015-0104539 filed in the Republic of Korea on July 23, 2015, the disclosure of which is hereby incorporated by reference. Background technique [0003] Secondary batteries having electrical characteristics such as product ease of use and high energy density are widely used not only in portable devices but also in electric vehicles (EV) or hybrid vehicles (HV) driven by electric power sources. [0004] Secondary batteries can greatly reduce the use of fossil fuels, do not produce any by-products after using energy, and are therefore regarded as a new type of environmentally friendly energy source that can increase energy efficiency. [0005] A battery pack used in an electric vehicle ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00H01M50/204H01M50/51H01M50/512
CPCH02J7/0016H01M50/51H01M50/512H01M50/204H01M10/42H01M10/44H02J7/0014B60L2240/547B60L58/22Y02T10/70Y02E60/10H01M10/4257H01M10/4264H01M2010/4271H01M2220/20
Inventor 成昌炫李相勋
Owner LG ENERGY SOLUTION LTD
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