Battery monitoring device and battery monitoring method
JPWO2025057930A5Pending Publication Date: 2026-06-12
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Filing Date
- 2026-02-25
- Publication Date
- 2026-06-12
AI Technical Summary
⚠Technical Problem
Existing battery monitoring systems that measure AC impedance generate significant heat, leading to increased circuit complexity and difficulty in achieving both heat suppression and reduced circuit scale.
⚗Method used
A battery monitoring device and method that utilize a first and second measurement circuit connected in series with sets of batteries, with a signal generator controlling switches in each circuit to perform impedance measurements at different timings, thereby distributing heat generation and reducing load resistance voltage.
🎯Benefits of technology
The solution effectively suppresses heat generation in the AC impedance measurement circuit, reduces circuit complexity, and allows for more efficient monitoring of battery health while maintaining accuracy.
✦ Generated by Eureka AI based on patent content.
Abstract
A battery monitoring device (201) comprises a signal generating unit that generates a control signal for controlling a first measuring circuit (1z) to which a first battery assembly (1) obtained by dividing a plurality of batteries connected in series is connected, and a second measuring circuit (2z) to which a second battery assembly (2) obtained by dividing the plurality of batteries is connected, and an impedance calculating unit (15) that calculates the AC impedance of each of the plurality of batteries on the basis of a measured current value flowing through the first measuring circuit (1z) and the voltage value of each battery included in the first battery assembly (1), and a measured current value flowing through the second measuring circuit (2z) and the voltage value of each battery included in the second battery assembly (2), wherein: the first measuring circuit (1z) includes a first switch; the second measuring circuit (2z) includes a second switch; and the signal generating unit generates a control signal for exclusively turning on the first switch and the second switch.
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