A method and device for measuring the charging and discharging capacity of an electric vehicle
By combining PZT ceramic bodies with manganese-copper shunts inside electric vehicles, the thermal deformation of the shunts is sensed and compensated, thus solving the problem of large metering errors in electric vehicle charging and discharging and achieving high-precision metering results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- YONGSHANG ENERGY INTERNET INTELLIGENCE RESEARCH INSTITUTE (TIANJIN) CO LTD
- Filing Date
- 2026-06-15
- Publication Date
- 2026-07-17
AI Technical Summary
Existing electric vehicle charging and discharging metering methods have significant errors, especially when the internal space of an electric vehicle is limited. Existing shunts cannot effectively compensate for errors caused by temperature changes, resulting in inaccurate billing.
By combining a PZT ceramic body with a manganese-copper shunt, the thermal deformation of the shunt is sensed through the piezoelectric effect of the PZT ceramic body, the charging current is calculated and compensated, and a micro fan is used for cooling to achieve accurate metering.
It improves metering accuracy, reduces the size and weight of the shunt, and is suitable for charging and discharging metering inside electric vehicles, achieving a metering accuracy of 0.05 class.
Smart Images
Figure CN122402299A_ABST