What is a secondary lithium battery?

December 14, 2022

Lithium batteries can be divided into primary lithium batteries and secondary lithium batteries. A secondary lithium battery pack refers to a lithium battery composed of several secondary battery packs, which is called a secondary lithium battery pack. A primary battery refers to a battery that cannot be recharged repeatedly, such as the 5th and 7th batteries we commonly use. Secondary batteries refer to batteries that can be recharged repeatedly, such as nickel-metal hydride, nickel-cadmium, lead-acid, and lithium batteries.

What is a secondary lithium battery pack?

A secondary lithium battery pack refers to a lithium battery composed of several secondary battery packs, which is called a secondary lithium battery pack. A primary lithium battery is a lithium battery that cannot be charged, and a secondary lithium battery is a rechargeable lithium battery.

The primary lithium battery is mainly used in the civil field: public instrument RAM and CMOS circuit board memory and backup power supply: memory backup, clock power supply, data backup power supply: such as various smart card meters/; water meters, electricity meters, heat meters, gas meters, Cameras; electronic measuring instruments: intelligent terminal equipment, etc.; widely used in industrial fields for automation instruments and equipment: automotive electronics TPMS, oil wells, mines, medical equipment, anti-theft alarms, wireless communications, marine lifesaving, servers, frequency converters , touch screen, etc.;

Secondary lithium batteries that everyone can often come into contact with are used in mobile phone batteries, electric vehicle batteries, electric vehicle batteries, digital camera batteries and so on.

The difference between primary battery and secondary battery

Structurally, a secondary battery undergoes reversible changes between electrode volume and structure during discharge, while the interior of a primary battery is much simpler because it does not need to accommodate these reversible changes.

The mass-specific capacity and volume-specific capacity of the primary battery are larger than ordinary rechargeable batteries, but the internal resistance is much larger than that of the secondary battery, so the load capacity is lower.

Primary batteries have much less self-discharge than secondary batteries. Primary batteries can only be discharged once, for example, alkaline batteries and carbon batteries fall into this category, and secondary batteries can be used repeatedly.

The internal resistance of the primary battery is much higher than that of the secondary battery, and its high-current discharge performance is not as good as that of the secondary battery. Under the condition of small current and intermittent discharge, the mass specific capacity of the primary battery is greater than that of the ordinary secondary battery, but when the discharge current is greater than 800mAh, Then the capacity advantage of the primary battery will be significantly reduced.

Secondary batteries are more environmentally friendly than primary batteries. Primary batteries must be discarded after use, while rechargeable batteries can be used repeatedly. Next-generation rechargeable batteries that meet national standards can usually be used repeatedly for more than 1,000 times, which means that the waste generated by rechargeable batteries is less than 1/1,000 of that of primary batteries. The advantages of secondary batteries are obvious no matter from the perspective of waste reduction or resource utilization and economy.