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Why lithium batteries turned into a “time bomb”

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      According to the United States well known writer of science Marshall Brain series of articles about the lithium batteries , the vast majority of the explosion of lithium caused a short  circuit, and the specific reasons including the load voltage / over-current use of aging.
      The lithium battery has been used vastly such as phone battery, digital camera battery and ccamcorder-battery-c-73.html”>amcorder battery , which manufacturing process, because the manufacturing process itself imperfect, it is easy to be isolated between the two poles, leaving a metal powder, copper foil, pieces of foil. The angle is provided in the battery as fever (more common in long-term use or load), like water boiling in a grain of rice, as in the electrolyte to make the random thermal motion. If you ever have the NB-1LH battery positive and negative particles or debris near the middle of the diaphragm, it could create a perforating fracture triggering micro-short circuits. As electrolyte batteries are flammable organic micro-short circuit cause an explosion in May, burns and other accidents, generally the following three cases: 
      1. Sparks ignited the electrolyte, and thus lead to a catastrophe to come into contact with the body in plastic and flammable, causing a fire; 
      2. Experienced a temperature rise caused by the NB-5L battery, the battery inside the space is small, perhaps due to increased pressure to explode;

      3. Batteries slower growth temperature, the battery case to melt gradually, so that the leakage of corrosive electrolyte. 

      Security Issues lithium batteries can not stop now, because then the manufacturing technology advanced, will inevitably lead to planting seeds in the electrolyte “missile”. Note that the formal production of lithium batteries and sales of high standards of lithium batteries of acceptable quality, the number and size of debris have been controlled within a small, very low risk of perforation of the diaphragm cell outside the Shell also used flame retardant material, are not prone to fires. 
      The explosion proof lithium battery of measures 
      Security Issues lithium batteries, the NB-2LH battery manufacturer, well aware, then what they used explosion proof action? Li-ion batteries for laptops, for example, its operating principle is as follows: lithium batteries near full charge and discharge almost empty when the voltage drop, the control circuit detects this situation, notify the protection circuit cut power to avoid overcharging or excessive discharge, so as not to shorten battery life.
      The lithium batteries have a current portable multi more comprehensive mechanism level protection, even in the charger, laptops unusual circumstances, the laptop battery can also be converted to the status of automatic protection is generally not explosion. But once the control circuit protection circuit and the ability to work reduced hours, the battery on the point of “dangerous” file. Mobile phones and other electronic products, battery lithium and mechanisms of protection against discharge, similar to that. 
       Do not need “at arm’s length” 

       In recent years, lithium-ion electronics explosions often newspapers, has caused much panic among consumers, some people for their own cell phone, MP3 pricing often “at arm’s length”, also because of fear, while just a long term will be set aside laptop battery, lead scrap. However, the results of the survey, the majority of outbreaks of lithium batteries are the result of the attention of the user pays for safety tips such as unauthorized modification, use of non-correspondence battery charger, battery placed in extreme environments such as decisions.

      Should be stressed that the technology of lithium batteries as a sort of after 30 years of study, has successfully commercialized the technology mature, its security is guaranteed. The regular brands of lithium batteries at the factory have been numerous procedural road test after being sold and the mechanism of feedback to recall the product over time. 
      United States Transportation Security Administration (TSA) has implemented the recommendations of the safe use of lithiumbatteries:  

       1. Using the original charger: Li-ion battery charging time is the period of heavy bombardment. That charger original battery is compatible with the battery charger to ensure better security.

       2. As a reliable stack: try to buy original batteries, not to save money to buy “second hand goods”, these batteries may be to maintain and more reliable than batteries origin. 

       3. Do not place the battery in the extreme environments: high temperatures, collisions, etc. are all important causes of battery explosion, as far as possible, so that the battery is in a stable environment, away from areas at high temperatures. 
      4. Do not change: Many young people like their phones to “cosmetic”, but it was “bold but prudent” in order to transform mobile phones into themselves. However, it can easily lead to accidents inappropriate alteration. The phone is a sophisticated communications equipment in the design, manufacturers will have on its security, strictly textual research. After modification, the battery may be not to consider the environment before or increased security risks.

Written by admin

September 10th, 2009 at 9:01 pm

Posted in Digital battery