Apparatus and method for cell balancing

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The cell balancing device and method address inefficiencies in conventional technologies by using DC/DC converters and PWM duty cycles to control individual battery cells, reducing costs and enhancing battery pack efficiency and lifespan.

KR102999081B1Active Publication Date: 2026-08-03SNS CO LTD +1

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Patent Information

Application Number: KR1020220143241
Authority / Receiving Office: KR · KR
Patent Type: Patents
Current Assignee / Owner
Filing Date: 2022-10-31
Publication Date: 2026-08-03
Estimated Expiration: 2042-10-31

Application Information

Patent Timeline

31 Oct 2022

Application

KR1020220143241

03 Aug 2026

Publication

KR102999081B1

IPC: H02J7/00

CPC: H02J7/52; H02J2207/20; Y02E60/10

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Application Domain

Batteries circuit arrangements Electric power

Technology Topics

Converters Electrical battery

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AI Technical Summary

Technical Problem

Conventional cell balancing technologies, such as active balancing and resistance-based methods, face challenges in high design costs and energy inefficiency, making it difficult to improve battery pack performance and lifespan.

Method used

A cell balancing device and method utilizing DC/DC converters and a controller to adjust voltage magnitudes of individual battery cells through PWM duty cycles, allowing independent control and reducing design costs while enhancing energy efficiency and lifespan.

Benefits of technology

The solution effectively reduces design costs and improves energy efficiency by independently controlling battery cells within a pack, extending the lifespan and enabling flexible voltage output adjustment.

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Abstract

A cell balancing device and method are disclosed. A cell balancing device according to one aspect of the present invention includes a plurality of DC / DC converters connected to each of a plurality of battery cells and outputting a voltage that is adjusted in magnitude from an individual battery cell according to a voltage control command from a controller, and a controller that generates a voltage control command to control the output voltage magnitude of each DC / DC converter based on the voltage magnitude of each battery cell and transmits the voltage control command to the corresponding DC / DC converter.

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