SOLUTION

SOLUTION

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SOP boundary test solution

MES integrated environment testing

MP cycle life test

Probe into the overdischarge test method of the cell

Ripple heating test solution

Ripple heating test solution

 

Testing Background and Purpose

 

◆ 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