Testing Background and Purpose
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About Stropower
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Ripple heating test solution
◆ In low-temperature environments, the internal resistance of lithium-ion power batteries increases sharply, leading to issues such as reduced range in new energy vehicles, insufficient cold start power, charging difficulties, and low charging efficiency.
◆ Effective heating of lithium-ion batteries is required at low temperatures to ensure their normal operation. Among the heating methods used in thermal management for power batteries, AC ripple self-heating rapidly raises the battery temperature through periodic charging and discharging. This method also offers advantages such as high energy efficiency and uniform temperature distribution.
AC Ripple Self-Heating Heat Generation Mechanism
◆ Generation of AC Ripple: When the electric vehicle is in states such as energy recovery, vehicle operation, or battery charging, AC ripples are generated on the high-voltage bus line.
◆ AC Ripple Self-Heating: In the BEV system, the motor's inductance is used as a load. By modifying the motor control strategy to produce AC ripples with specific amplitude and frequency, the power battery can self-heat.
Ripple Heating Test Solutions
◆ 1）Chip-Level Ripple Self-Heating
◆ 2）Pack-Level Ripple Self-Heating
2nd Floor, Building 3, East Zone, Modern Enterprise Center, No.2 Zhangba Wu Road, Yanta District, Xi 'an, Shaanxi