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Battery balancing device and method

A battery and balance technology, applied in the direction of battery, secondary battery, battery overcharge protection, etc., can solve the problems of battery cell overcharge, battery cell life reduction, battery cell voltage imbalance, etc., and achieve the effect of preventing overcharge.

Inactive Publication Date: 2018-09-28
LG ENERGY SOLUTION LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The battery cells of the secondary battery ideally need to have the same characteristics, but the battery cells have deviations in capacity, impedance, and internal resistance, and the deviations increase according to the performance of charge / discharge of the secondary battery
[0008] However, in the existing balancing circuit, when the control unit is abnormally operated, the on / off of the switching element controlling the electric conduction between the battery cell and the resistor is not normally controlled, and when the discharge of the battery cell is required When the switching element is not turned on, there is a problem that the battery cell is overcharged and the life of the battery cell is reduced, and even the life of the secondary battery is reduced due to the voltage imbalance between the battery cells

Method used

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Embodiment Construction

[0031] Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. Here, redundant descriptions, and detailed descriptions of known functions and configurations that may unnecessarily obscure the object of the present invention will be omitted. The exemplary embodiments of the present invention are provided so that the present invention can be more fully explained to those skilled in the art. Therefore, the shapes, sizes, etc. of elements in the drawings may be exaggerated for clearer description.

[0032] Throughout the specification, unless it is clearly described to the contrary, when it is said that a certain portion “includes” a certain constituent element, it means that other constituent elements may be further included, not excluded.

[0033] In addition, the term "... unit" described in the specification means a unit for processing at least one function and operation, and may be realized by hardware components or softwar...

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Abstract

The present invention relates to a battery balancing device and method and, more specifically, to a battery balancing device and method in which a control unit controls the operation of a balancing unit for performing balancing of a battery cell included in a battery according to a voltage value of the battery cell, and a self-discharging unit discharges the battery cell according to whether the voltage value of the battery cell exceeds a preset first reference voltage value when the balancing unit does not operate.

Description

technical field [0001] This application claims priority and benefit from Korean Patent Application No. 10-2016-0097478 filed with the Korean Intellectual Property Office on Jul. 29, 2016, the entire contents of which are hereby incorporated by reference. [0002] The present invention relates to an apparatus and method for balancing a battery, and more particularly, to an apparatus and method for balancing a battery in which a control unit controls the operation of the balancing unit in response to voltage values ​​of battery cells included in the battery, the balancing unit The unit performs balancing of the battery cells, and the self-discharging unit discharges the battery cells according to whether a voltage value of the battery cells exceeds a predetermined first reference voltage value during non-operation of the balancing unit. Background technique [0003] Recently, due to depletion of fossil energy and environmental pollution due to use of fossil energy, interest in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00H01M10/42B60L11/18
CPCH01M10/42H02J7/00B60L50/50B60L3/0084B60L3/0092B60L58/22B60L58/15Y02T10/70Y02E60/10H01M10/425H02J7/0019B60L2240/547H01M2010/4271H02J7/0016H02J7/00302H02J7/00308H01M10/44H01M2220/20H02J7/0014
Inventor 李根旭李相勋朴俊哲崔然植
Owner LG ENERGY SOLUTION LTD