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The working principle of lithium ion battery protection circuit

Time:2020-12-30 Views:197

  With the development of economy, electronic products have entered ordinary people's families. People's application demand for electronic products is also increasing. With the increasing demand for electronic products, people's demand for lithium-ion batteries is also increasing. Lithium-ion batteries are batteries with relatively large power reserves, which are widely used in various electronic products. However, some illegal merchants in the market took aim at this point. They flooded the city with many fake batteries, making it impossible for consumers to buy real products.

The working principle of lithium ion battery protection circuit(图1)

  Serious quality accidents have occurred in the storage of such fake and inferior lithium-ion batteries. These fake and inferior lithium-ion batteries are likely to have problems with overcharging and over-discharging, which may cause explosions, and may also cause internal circuit short-circuits and explosions. However, a product that effectively prevents lithium-ion batteries from overcharging, over-discharging and internal circuit short-circuiting is the lithium-ion battery protection board. Today, architects explain the use of lithium-ion battery protection boards from a professional perspective.

  We all know that the lithium-ion batteries that people use are actually composed of several small lithium-ion batteries in parallel. They are separated by several plastic-like panels in the gap between the internal lithium-ion batteries. These small plastic plates are actually protective plates for lithium-ion batteries. In fact, the lithium-ion battery protection board is not made of plastic. It consists of several non-conductive fiberboards coated with oil. As we all know, oil does not conduct electricity, which is why the lithium-ion battery protection board can isolate multiple lithium-ion batteries to prevent short circuits.

  On the other hand, we talked about the lithium-ion battery protection board also has the function of protecting the battery and preventing the battery from overcharging. When the battery is continuously and rapidly charged by an external power source, the lithium-ion battery protection board has a protective purpose. When the internal power supply of the lithium-ion battery reaches saturation, the internal circuit of the lithium-ion battery protection board will automatically cut off the external fast charging power supply. Prevent external power from entering the battery. This is also the principle of lithium-ion battery protection board for battery overcharge protection.

  We also went to the lithium-ion battery protection board to protect the lithium-ion battery and prevent the over-discharge of the lithium-ion battery. When the lithium-ion battery is discharged excessively, the internal memory of the lithium-ion battery can undergo qualitative changes. At this time, the lithium-ion battery protection board can sense and quickly disconnect the discharge power. The led lithium-ion battery is not all electric versions to ensure that the current lithium-ion battery internal The stability prevents the discharge of lithium-ion batteries.

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