Generally, there is a button-type lithium battery on the motherboard of a desktop computer, which provides a small current and can be used normally for about 3 years
Dioxide battery lithium manganese
Using lithium metal as the negative electrode, processed manganese dioxide as the positive electrode, the insulation membrane is the same as that of lithium ion batteries, and the electrolyte is an organic solution of lithium perchlorate, cylindrical or button type. The battery should be installed in a protective gas atmosphere with an ultra-low dew point. Once filled with liquid, it has electricity, 3V voltage, very low self-discharge rate and is durable for storage of more than 3V years.
Generally, there is a button-type lithium battery on the motherboard of a desktop computer, which provides low current and can be used normally for about 3 yearss on access cards, instruments, etc. of some hotels. also use lithium - 2 The use of manganese oxide batteries has been decreasing year by year in recent years.
Lithium thionyl chloride battery
Using lithium metal as the negative electrode, the positive electrode and electrolyte are thionyl chloride (thionyl chloride), cylindrical battery , ready for assembly Electricity, voltage 3.6 V, is one of the battery types with the most stable operating voltage and is currently the battery with the highest capacity per unit of volume (mass). Suitable for use on electronic equipment that cannot be serviced frequently to provide fine current.
Other lithium batteries include lithium ferrous sulfide batteries, lithium sulfur dioxide batteries, etc.
Structure of lithium-ion batteries
Batterieslithium batteries generally come in two shapes: cylindrical and square.
The interior of the battery adopts a spiral winding structure, and a very thin and highly permeable polyethylene film insulating material is used to separate the positive and negative electrodes. The positive electrode includes a current collector composed of lithium cobalt oxide (or lithium nickel cobalt manganate, lithium manganate, lithium iron phosphate, etc.) and a foil 'aluminum. The negative electrode consists of a current collector made of graphitized carbon material and copper foil. The battery is filled with an organic electrolyte solution. In addition, a safety valve and PTC element (used in some cylindrical types) are installed to protect the battery from damage caused by abnormal conditions and output short circuits.
The voltage of a single Li batterythium is 3.7V (the positive electrode of lithium ferrous phosphate is 3.2V) and the battery capacity cannot be infinite. Therefore, single lithium batteries are often connected in series or parallel. .To meet the requirements of different occasions.
1. Find the location of the CMOS battery on the motherboard. The appearance is as follows
2 There is a latch on the CMOS battery holder to fix the battery.
3. You can use a screwdriver to press the latch
4. The battery will appear automatically once the latch is loosened
5. battery and replace it with a new one. That's all