Let’s imagine you’ve created a new electronic good! This product is amazing, and you would love to show it to the world. But what if the battery catches on fire? That would mean a lot of faulty products and unhappy customers. Worst of all, you will get a bad reputation and potentially even lawsuits.
This is why products need to be tested for reliability before coming to market. For electronic goods, the best way to do it is to get a UL 9540 certification. UL will test your product and make sure that it’s reliable enough to meet industry safety standards and standards for UL 9540 energy storage.
DEFINITION OF UL 9540
UL 9540 is a safety standard for an energy storage system (ESS) and equipment intended for connection to a local utility grid or standalone application. It designates key issues associated with ESS. These include:
UL 9540A, on the other hand, is a test method for evaluating thermal runaway propagation for battery energy storage systems. This will not give you the certificate! Instead, it will provide data for manufacturers to see if their product meets the regulations.
This is very useful for engineers and developers to verify the effectiveness of the product’s protection against key issues like fire.
The Test Hierarchy of UL9540A
There are 4 stages in the UL9540A test method:
#1 - CELL LEVEL TEST
At this level, UL looks at whether a cell can exhibit thermal runaway. It also checks its characteristics and flammability.
#2 - MODULE LEVEL TEST
In this stage, the main goal is to determine if thermal runaway propagates with the module. They will also find out the heat release and gas composition.
#3 - UNIT LEVEL TEST
Now they will look at the whole unit and see the following. Firstly, they find out how quickly fire spreads. Then they will look for its heat and gas release rates and other hazards.
#4 - INSTALLATION LEVEL TEST
Lastly, they do an installation test. This is an optional test, but its goal is to determine how effective the product’s fire protection is.
Requirements for UL 9540
Before you go and get yourself a UL certification, you need to make sure that your product meets the requirements!
For UL 9540, your device shouldn’t exceed the maximum energy capacity:
You should also check that product’s polymeric materials comply with requirements outlined in UL 746C. The only exceptions are electronic systems intended for outdoor installation and electrochemical ESSes. These need to employ an enclosure of non-combustible materials.
Lastly, you should also have some cash in hand. It usually costs between $5,000 to $15,000 to get your product certified.
Which One to Get?
That depends on your needs. You could get a UL Recognized certification to make sure your products are in the industry standard. Plus, it’s easier to get it as there are fewer tests involved. Taking the time and effort to obtain a UL certification will ensure the safety of your product.
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