The meaning and difference of primary battery and secondary battery

The meaning of primary and secondary batteries Primary batteries are only disposable batteries. When the chemical energy in the battery is converted into electrical energy to supply electricity, the original electrical energy cannot be supplemented by charging or other methods, so it is completely discharged Will no longer be used, this is the electrochemical reaction as irreversible. Different types of disposable batteries have different ways of use, but they are all limited to single use. The raw materials used in the manufacture of many battery types and the materials used in the manufacturing process are polluting and have a considerable impact on the environment and the human body. The secondary battery is a reusable battery that can be continuously charged and discharged. The secondary battery is also converted into electrical energy through chemical energy, but the electrical energy can be converted into chemical energy by the charging method, so that the battery can be converted into chemical energy. Reuse, and the number of uses varies with the material and design. Different types of secondary batteries have different uses because of their rated voltage, rated capacity, operating temperature, and safety. The difference between the primary battery and the secondary battery ①The self-discharge of the primary battery is much smaller than that of the secondary battery; the primary battery can only be discharged once, and the secondary battery can be repeatedly charged and discharged for cycle use; ②The mass specific capacity and volume specific capacity of the primary battery are both greater than Generally, rechargeable batteries have much larger internal resistance than secondary batteries, so the load capacity is lower; ③The reversible changes between the electrode volume and structure of rechargeable batteries occur during discharge, so these changes must be adjusted during the design, while the interior of the primary battery Much simpler, because it does not adjust these reversible changes; ④The secondary battery is more environmentally friendly than the primary battery. After a battery is used, it must be discarded, and rechargeable batteries can be used repeatedly. The next-generation rechargeable batteries that meet national standards can usually be used repeatedly more than 1,000 times, which means that the waste of rechargeable batteries is less than 1/1000 of a battery, regardless of From the perspective of waste reduction or resource utilization and economy, the advantages of secondary batteries are obvious; ⑤ They have higher specific energy and load capacity, and self-discharge rate. The energy density of primary batteries is much higher than that of secondary batteries, but their load capacity is relatively small. For example, disposable alkaline batteries are particularly suitable for electric toys, cameras, shavers, and other power-consuming electrical appliances. The secondary battery has a relatively high load capacity, and the rechargeable battery has a high energy capacity with the development in recent years. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: What are the advantages of lithium iron phosphate batteries