EPO Patent Publication: Battery Management System Voltage Estimation
Summary
The European Patent Office has published patent application EP4712300A1 concerning a battery management system (BMS) that estimates actual cell voltage by removing voltage errors caused by wiring resistors. This technology is developed by SAMSUNG SDI CO., LTD.
What changed
This document is a publication of a European patent application (EP4712300A1) by SAMSUNG SDI CO., LTD., detailing a novel battery management system (BMS). The system utilizes stored resistance values of wiring resistors to correct measured cell voltages, thereby providing a more accurate estimation of the actual battery cell voltage. This aims to improve battery performance and longevity by accounting for voltage drops across connection paths.
While this is a patent publication and not a regulatory rule, it signifies technological advancement in battery management. Companies involved in battery manufacturing, electric vehicle production, or consumer electronics utilizing batteries should be aware of such innovations. There are no immediate compliance obligations or deadlines associated with this patent publication, but it may influence future industry standards or product development strategies.
Source document (simplified)
BATTERY MANAGEMENT SYSTEM, OPERATING METHOD THEREOF, AND BATTERY PACK
Publication EP4712300A1 Kind: A1 Mar 18, 2026
Applicants
SAMSUNG SDI CO., LTD.
Inventors
KIM, Tae Jin
Abstract
A battery management system (BMS) including a memory in which a resistance value of a wiring resistor of an electrical connection path between a battery cell and the BMS is stored, and a processor configured to measure a first cell voltage of the battery cell and to remove a voltage error due to the wiring resistor reflected in the measured first cell voltage based on the resistance value of the wiring resistor stored in the memory to estimate a second cell voltage that is an actual voltage of the battery cell.
IPC Classifications
H02J 7/00 20260101AFI20251103BHEP H01M 10/48 20060101ALI20251103BHEP H01M 10/42 20060101ALI20251103BHEP
Designated States
AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LI, LT, LU, LV, MC, ME, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR
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