What is Dynamic Load?

Often referred to as live load, Dynamic load is heat produced from a device under test (DUT).

What is the impact of Dynamic Load to an Environmental Test Chamber?

Environmental Test Chambers are equipped with cooling systems to handle live loads produced inside a test chamber. These cooling systems will include components such as refrigeration units, heaters, fans, and circulation pumps. The specific design and capacity of the cooling system depend on the heat load generated by the DUT and the desired temperature range within the chamber.

The cooling system works by extracting heat from the chamber and dissipating it outside. Heat exchangers facilitate the transfer of heat from the chamber to a refrigerant or coolant, which is then circulated through the cooling system. The coolant absorbs the heat and carries it to the external cooling components, such as a condenser or radiator, where the heat is released to the surrounding environment.

The proper size of the environmental test chamber and the type of cooling system are crucial to ensure that the chamber can effectively handle the live load and maintain the desired temperature conditions during testing. The heat load generated by the test specimen, along with factors like ambient temperature, required temperature range, and chamber size, must be considered when selecting a test chamber for your specific application.

How Does Dynamic Load Affect Battery Testing? 

Lithium-ion batteries are hyper-efficient at ambient temperatures. Most of the heat produced by a lithium-ion battery is converted into electricity. Anytime a battery emits heat, it is considered waste because that energy is not converted into electricity. 

So, how does dynamic load relate to battery testing? Changing the temperature within the battery test chamber affects the cells, specifically when they are too hot or cold. Testing cells at a high C rate will release heat, which is wasted energy and contributes to the dynamic load in the chamber.