Let Chroma Test the Temperature Control Mechanism of Your EV!

Car manufacturers are continuing to improve endurance in an effort to overcome EV range anxiety. As a result, the energy density of onboard batteries has gradually advanced. The next question is how to perfect the temperature monitoring mechanism of the battery system. In order to ensure the battery’s service life and avoid thermal runaway, the heat dissipation and overheating protection strategies are vital issues at the design stage of the battery system.

A battery electric vehicle (BEV) generally has a battery system containing about 100 temperature measurement points. Each measurement position represents the battery temperature status in its area. Using the overall temperature distribution status collected by the BMS as well as the subsequent monitoring and judgment results, the control strategy of the actual vehicle can be corrected in real time to improve water cooling efficiency, limit battery charge/discharge current, etc.

Because it is highly important to combine the mechanism for battery temperature control with the one for BMS, test labs and battery manufacturers have now proposed verification requirements for judgments on these two mechanisms. During the test process, it not only requires accurate temperature measurements and synchronized temperature reading, but also must immediately detect any temperature changes for the temperature controller to simulate instantly.

Chroma battery test systems solve this issue by obtaining the internal and external temperature values of the test object through a CAN device or data logger, based on which the upper-level Battery Pro software makes judgments and sends commands in time. During the test, users can directly adjust the charge and discharge parameters and control the setting values of external equipment, including the temperature controller and water cooler. This temperature control simulation function allows the battery test to approach the EV’s driving conditions even closer, simulating the operation of the actual ambient temperature and heat dissipation mechanism. Chroma’s flexible and programmable battery test systems have already been successfully put into operation by several well-known national testing labs and manufacturers throughout the automobile industry.

Chroma 17020 and 17040 Regenerative Battery Pack Test Systems integrated with Battery Pro software for charge/discharge tests offer the following features:

  1. Built-in test steps for standards, such as IEC 61960 DCIR, IEC 62391, IEC 60896, HPPC.
  2. Equipped with functions for test program editing and automated cycle testing, which can simulate real driving conditions.
  3. Integrating a diversity of instruments (e.g. CAN device, data logger) and equipment (e.g. temperature controller, water cooler, switching jig).

▲Chroma 17020 Automated Battery Test System

With well over 35 years of experience in the field of precision test equipment, Chroma is the leader of automated test systems. The specialist in a wide range of power and electricity related test applications continuously rides the wave of developing trends in new energy. To this extend, Chroma is actively engaged in electric vehicles, energy storage systems, and other industries to provide a full range of test solutions.

For more details on these and other products, please visit Chroma’s website. Feel free to ask us any questions you may have. We are happy to be of service.


Aaron Williams Mayer
cadmin

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