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Cell balancing apparatus, battery apparatus including same, and cell balancing method

A technology of balancing device and battery device, which is applied in the direction of battery, control device, secondary battery, etc., can solve the problems of increasing the cost of single balancing circuit and so on.

Pending Publication Date: 2021-09-03
LG ENERGY SOLUTION LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since many components are required to realize an active cell balancing circuit, there is a problem that the cost of the cell balancing circuit increases

Method used

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  • Cell balancing apparatus, battery apparatus including same, and cell balancing method
  • Cell balancing apparatus, battery apparatus including same, and cell balancing method
  • Cell balancing apparatus, battery apparatus including same, and cell balancing method

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Embodiment Construction

[0031] In the following detailed description, only certain embodiments of the present invention are shown and described, simply by way of illustration. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. Accordingly, the drawings and descriptions are to be regarded as illustrative in nature and not restrictive. Throughout the specification, the same reference numerals denote the same elements.

[0032] When it is described that an element is "connected" to another element, it will be understood that the element may be directly connected to the other element or be connected to the other element through a third element. On the other hand, when it is described that an element is "directly connected" to another element, it will be understood that the element is not connected to the other element through a third element.

[0033] As used herein, sin...

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Abstract

An apparatus for cell balancing of a battery module, in which a first battery cell, a plurality of second battery cells, and a third battery cell are connected in series, is provided. A first terminal of a first inductor is connected to a negative electrode of the first battery cell, and a first terminal of a second inductor is connected to a positive electrode of the third battery cell. A first transistor is connected between a second terminal of the first inductor and a second terminal of the second inductor. A first active element is connected between a positive electrode of the first battery cell and the second terminal of the first inductor, and a second active element is connected between a negative electrode of the third battery cell and the second terminal of the second inductor.

Description

[0001] Cross References to Related Applications [0002] This application claims priority and benefit from Korean Patent Application No. 10-2019-0147975 filed with the Korean Intellectual Property Office on November 18, 2019, the entire contents of which are hereby incorporated by reference. technical field [0003] The described technology relates to a cell balancing device, a battery device including the cell balancing device, and a cell balancing method. Background technique [0004] Inside the battery pack, a plurality of battery cells are connected in series or in parallel. The voltage deviation between the battery cells may cause over-discharging or over-charging of the battery cells, and also shorten the life of the battery cells. A cell balancing circuit is designed in the battery management system (BMS) to improve voltage deviation. [0005] As the cell balancing circuit, a passive cell balancing circuit may be used which maintains the balance between the battery ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/42H01M10/48H01M50/51
CPCH01M10/4285H01M10/4207H01M10/482H01M50/51B60L58/22Y02T10/70Y02E60/10B60L2240/547H01M10/425H01M10/441H02J7/0019H01M2010/4271H01M2220/20
Inventor 成昌炫
Owner LG ENERGY SOLUTION LTD
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