Battery knowledge

一、Disposable alkaline battery

Disposable zinc-manganese alkaline dry battery, this kind of battery can be regarded as the national production and sales of the top, there are many domestic brands, such as the most common "Nanfu, Energizer, Duracell, GP super Ba, Exdan" are the production and marketing of zinc-manganese dry battery. This battery price is relatively cheap general AA(No.5) battery 1.5-2.5 yuan/unit, and good power, long storage time, good temperature adaptation conditions, battery nominal voltage 1.5V, starting voltage up to 1.6V, continuous discharge to 0.9V (1 ohm) up to two and a half minutes, suitable for small current density discharge. The disadvantage is that the general internal resistance is relatively large, in the case of too much discharge current, electrochemical polarization increases, the working voltage drops rapidly, the battery output capacity is reduced (this may be the digital camera using alkaline battery to take a very small number of photos, battery discharge too fast, and the battery placed after a period of time can still be used normally). Usually some people hope that this battery can be charged and used again, in fact, it is feasible, now most of the manganese ring structure of zinc manganese alkaline dry batteries can be charged theoretically, and the charging effect is good, once a friend used domestic intelligent microcomputer charger to Nanfu AA(No. 5) battery battery charging, the result was recharged to about 45% of the capacity of the primary battery, but also recycled 4, Five times. However, it is not recommended to charge the zinc-manganese alkaline dry battery, after all, the general charger does not support this function, and to charge the disposable battery easy to bring the risk of overheating, or even explosion! Now the general alkaline batteries are very low in mercury content, but it is still harmful to the environment to discard randomly. We should have the awareness of environmental protection, throw the batteries into the battery recycling bucket specially collected batteries, to prevent pollution and protect the environment.

二、Lithium - manganese dioxide button battery

Button battery lithium battery, lithium - manganese dioxide disposable button battery (CR button battery series). The nominal voltage of lithium manganese disposable button battery is 3V, the termination voltage is 2V, and the typical operating current is 0.1-0.2mA. It uses manganese dioxide with very stable chemical properties as the positive electrode material and lithium metal with very high specific energy as the negative electrode material. The annual average capacity is reduced by no more than 2%, and the storage life is long. The battery adopts semi-sealed structure and is safe to use. Lithium manganese disposable button battery has a wide range of temperature adaptation in the conditions of -20 to 60 degrees Celsius can work normally. Used in the electronic dictionary, motherboard CMOS battery, watch and so on. There are also two rechargeable lithium button battery, due to less use, not common, just briefly, I know this kind of battery is that its voltage is higher than disposable, nominal 3.6V, full charge can be 4V, less self-discharge monthly average about 10%, no memory effect, but not much capacity, about the same model of lithium manganese disposable button battery capacity about 1/7. Briefly talk about the lithium manganese button battery model, CR stands for lithium manganese dioxide, CR after the four digits, the first two digits are diameter, the last two digits are height, for example: CR2032 refers to a 20mm diameter, 3.2mm high lithium manganese dioxide disposable button battery. Similarly, CR1220 refers to a disposable lithium-manganese dioxide button battery with a diameter of 12mm and a height of 2.0mm. Lithium manganese disposable button batteries can not be charged, can not short circuit, can not be heated, in inventory and abandoned to pay attention to the battery should be insulated, if the battery contact with other objects, may explode, or failure.

三、 Zinc-air button battery

Zinc-air button battery is special, in my opinion, its only civilian market, is high-end electronic cochlear, electronic hearing AIDS. This kind of battery is a metal zinc as a negative electrode, oxygen in the air as a positive electrode depolarizing agent of the primary battery, because the positive active material stored in the atmosphere, inexhaustible, so this kind of battery outstanding characteristics is high specific energy, for the first series of chemical power. In addition, there are energy saving, material saving, environmental and ecological pollution-free advantages, zinc air battery voltage is 1.4V, and at the bottom of the battery has an intake hole, the bottom of the battery has been glued to the factory, at this time there is no oxygen in the battery, in a dormant state, tear the paper after 5-30 minutes the battery is gradually activated by air. Zinc-air batteries use oxygen in the air as a positive material, so there is no need to put it in the battery, which has room for more negative material. As a result, its capacity is 3 to 10 times higher than other batteries, which is the highest of all practical battery systems. This battery also has the advantages of stable operating voltage, small noise, and so on, is the best source of advanced hearing AIDS in the ear, ear and ear canal.