Battery products continue to evolve with the rapid development of today's technology and the growing awareness of environmental protection. Among them, rechargeable batteries have been widely used in many portable 3C electronic products, such as mobile phones and MP3s, because of their recyclability. Or an iPod Walkman, a digital camera or a laptop. This article refers to the address: http:// Just as the safety of rechargeable batteries has become a topic of public concern, we cannot ignore the safety requirements of the “chargers†that are being developed. UL safety regulations for charger products In response to the trend of 3C products becoming lighter and more diversified, the battery must be new and smaller, but whether it is nickel-cadmium, nickel-metal hydride, lithium-ion or lithium-polymer batteries, it may be because the design is not well-designed. It implies a huge dangerous energy that is enough to cause injury or even fatality. This is also one of the main reasons why battery safety requirements continue to receive international attention in recent years. UL has developed corresponding standards as evaluation specifications for the safety of various battery products, and these standards have been highly recognized by the industry. Following the development of battery technology, we must extend the scope of safety to charger products. When the battery is fully charged, it becomes another DC power source for the charger, other than the mains power outlet, and the charger output. If the charger is not designed properly, or internal parts are faulty or short-circuited, it may cause danger. For example, through the output line or output terminal of the charger, the full battery energy is poured into the charger, which may cause the insulation inside the charger to fail due to overheating, causing the outer casing to melt due to overheating and even cause a fire. A few years ago, there was a similar case in the United States, because the fully charged battery caused the line fault at the internal output of the charger to short-circuit, becoming a very large discharge circuit, causing the isolation transformer to be insulated due to overheating. Crash and the shell melts. Since chargers and their compatible rechargeable batteries are designed to work with end applications, UL has developed a range of safety standards for different types of power products. For example, UL 1310 audits Class 2 output chargers; UL 1012 reviews general non-vehicle battery chargers; UL 1236 reviews vehicle battery chargers; UL 1564 reviews golf electric vehicle chargers. Among the safety assessment projects, the most notable is the new article “Backfeed Protection†(BFP) derived from the above-mentioned US case, including the chargers covered by UL 1310 and UL 1012, UL. In addition to the structure of the product, a protection against back-feeding must be provided at the output, and in the actual product inspection, an additional safety assessment of the back-feed protection is required. Because the charger has more potential dangers than the general power supply, it will be stricter than the general power supply products or have more additional terms, regardless of the requirements of the structure or test items, to simulate the user charging. In the process of the abnormal situation that may be encountered; and in order to protect the user with more layers, the warning mark on the charger is also within the scope of the UL evaluation, such as the product must be marked with "Backfeed Protection" or It is "BFP" and must have a clear indication to remind the user to only charge the specified battery with the charger, or clearly indicate the type, type and quantity of these batteries in the manual attached to the product.
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