Polymer lithium battery short circuit causes and repair methods

Source: 2020 - 03 - 28 14:24 hits: lithium polymer battery short circuit causes and repair methods of polymer lithium battery short circuit the cause and the correction methods. Lithium-ion polymer battery with its incomparable advantage, in more and more application fields, has gone international marketing belong to high risk products with lithium polymer batteries, battery safety has always been an important problem of the industrialization of lithium battery. The author tell you correct method, and the reason of polymer lithium battery short circuit allows you to use lithium battery safer. Polymer lithium battery short-circuit reasons when polymer lithium-ion batteries in charging of charge or discharge phenomenon, don't match the charger and mobile power is easy to form the battery overcharge, the expansion of the polymer lithium ion battery is likely to increase. When the battery charge and discharge, the battery is on the rise, gas expansion in the activation process, the battery internal pressure, pressure reaches a certain degree. And a sealing lip maintenance problems, edge sealing aluminum plastic composite film packaging material sandwich is made of pure aluminum, excellent conductive function, solid insulation isolation method must be used when using, avoid short circuit and external component composition, may constitute cell corrosion gas. Polymer lithium battery short-circuit method is by the battery in the process of film and flexible packaging, collecting liquid anode and cathode break electrolyte clearance, physical contact and short circuit, called physical short circuit; Another kind is the battery charge and discharge cycle, electrode activity and electrolyte clearance data caused by the chemical changes between the electrical conduction, known as chemical short circuit. These two kinds of short circuit caused by the certain appearance of lithium-ion batteries is the same, such as: the formation of the battery curve is abnormal, the battery self-discharge, blow the discharge capacity of a battery and charge and discharge efficiency is not advanced. But because of the short circuit mechanism is different, so has the different effect of lithium polymer batteries. Generally speaking, polymer lithium battery internal chemical short circuit, the functions of battery performance not only wrong, but also with the use of the battery, the various function of polymer lithium battery may deteriorate rapidly; Physical short circuit, on the other hand, the activity of polymer lithium battery materials and electrolyte membrane key elements did not change, such as when a physical short circuit is not serious, the electrochemical reaction of the polymer lithium battery core unchanged, because a part of the short circuit current through the internal body contact and lost, and make a battery active substances of the actual current density into a process expected to reach different intentions, and form a mistake; In the process of storage and use, due to the internal circuit, the self-discharge of the battery and discharge capacity is small, charge and discharge efficiency is low. Assume that physical short circuit is very small, to detect the 'abnormal' effect of the use of polymer lithium battery is minimal. When short-circuit serious physical, most of the current inside the cells' lost ', the battery can't charge. Assume that occurred after the formation of the phenomenon, as a result of short circuit and overheating changed the electrochemical reaction mechanism of the battery, battery may occur the phenomenon such as blowing. Polymer lithium battery short circuit correction method 1. Reduce the charging current, reduce the charging voltage, check whether the valve body is blocked. 2. Charge and discharge on a regular basis. Power supply system of polymer lithium battery float charging pressure and discharge voltage, many of them in the factory has been adjusted to the rated voltage, discharge current increases with the increase of load. Lithium-ion polymer battery storage will lose some capacity by self-discharge. Therefore, after the equipment in use, before put into use in polymer lithium battery, should according to the open circuit voltage of battery to determine the residual capacity of battery, and then choose a different method to make up for the polymer lithium battery charging. Polymer lithium battery equipment and tools should be used for insulation methods, should be taken outside of the electrical wiring should be connected to the battery, after checking there is no short circuit, and finally connected to the polymer lithium-ion batteries, wiring standards should be excellent insulation, avoid compressed stack segment.