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The technical specifications when testing batteries to ensure device safety

At present, battery and electric vehicle manufacturers are meeting the standards and mandatory requirements for batteries. Battery testing aims to maximize the safety, reliability, performance, and lifespan of the product. This helps businesses confidently meet customer expectations, adhere to regulatory standards, access the market, and reduce the risk of costly product recalls.

What is Battery Testing

Today, battery technology is advancing rapidly. However, customer expectations for quality and safety remain stringent.

Battery testing addresses these concerns by confirming the safety, quality, and reliability of batteries used in various applications. This includes batteries applied in transportation such as electric vehicles, railways, maritime, and aviation, batteries for energy storage and grid balancing, backup power applications, wireless devices, and medical devices.

Why is Battery Testing Necessary

Batteries must not pose a danger to humans and should maintain performance and quality, even in harsh conditions. Therefore, they need to be thoroughly assessed before use with a range of tests on battery efficiency, quality, safety, and reliability. Testing ensures that batteries meet the quality and legal standards required by the industry and manufacturers.

Common Battery Testing Methods

Reliable results are only possible when robust symptoms are present. This is not always possible, especially with unformatted lead acid batteries or packs that had been in storage. A good battery pulled form service generally provides solid symptoms with good accuracy; readings from a weak battery can be muddled with inconsistent results. Reliable measurements are impossible if the symptoms are vague or not present, which is the case if the battery has turned into a potato. This fools the system and the battery becomes an outlier. Well-developed rapid-test methods should correctly predict 9 batteries out of 10. EIS has the potential to advance further and surpass other technologies.

The table below summarizes test procedures with the most common battery systems. Lead acid and Li-ion share communalities in keeping low resistance under normal condition. Exceptions are heat fail and mechanical faults that raise the internal resistance and a battery replacement ahead of time. Nickel-cadmium and nickel-metal-hydride, and in part also the primary battery, reveal the end-of-life.

Battery test methods for common battery chemistries

Reference

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