What is the working principle of dry battery? What is the voltage of a dry battery?

Dry battery working principle Dry battery belongs to the primary battery in chemical power supply. It is a kind of disposable battery. Its carbon rod is used as the positive electrode and the zinc cylinder is used as the negative electrode, which converts chemical energy into electrical energy and supplies it to an external circuit. In the chemical reaction, because zinc is more active than manganese, zinc loses electrons and is oxidized, while manganese gets electrons and is reduced. Dry batteries are not only suitable for flashlights, semiconductor radios, tape recorders, cameras, electronic clocks, toys, etc., but also for various fields in the national economy such as national defense, scientific research, telecommunications, navigation, aviation, and medicine. Ordinary dry batteries are mostly manganese-zinc batteries, with a positive carbon rod in the middle, a mixture of graphite and manganese dioxide outsourcing, and a layer of fiber mesh on the outside. The net is coated with a thick electrolyte paste, which is composed of ammonia chloride solution and starch, and a small amount of preservatives. The important working principle of dry batteries is that the oxidation-reduction reaction is realized in a closed loop. The electrode reaction formula of alkaline zinc-manganese dry battery is: Zn+2MnO2+2NH4Clu003dZnCl2++Mn2O3+2NH3+H2O What is the voltage of a dry battery? The voltage of dry batteries is an important performance parameter of dry batteries. The voltage value of dry batteries is expressed in volts (V), also known as potential difference or potential difference. It is a measure of the energy difference between the positive and negative electrodes of power lithium-ion batteries in the electrostatic field due to different potentials. The voltage of the dry cell is a variable process in the environment where the dry cell is located. Dry battery voltage is divided into three types: standard voltage, open circuit voltage, and working voltage. Ordinary batteries are 1.5v, nickel-cadmium or nickel-metal hydride rechargeable batteries are 1.2v, there are also cylindrical lithium batteries 3.7v, storage batteries 2v, etc., Europe also has a zinc rechargeable battery 1.9v. 1. Open circuit voltage: refers to the voltage of a dry battery in a non-working state. At this time, there is no current flowing. When the battery is fully charged, the potential difference between the positive and negative poles of the battery is usually above 1.6V, and the high can reach 1.725V; 2. The open circuit voltage corresponds to the working voltage, that is, the voltage of the dry battery in the working state. At this time, there is current flowing. Because the internal resistance when the current flows is to be overcome, the working voltage is always lower than the voltage at full charge; 3 , Termination voltage: that is, the battery should not continue to be discharged after it is placed at a certain voltage value. It is determined by the structure of the dry cell. The voltage of the dry cell when the discharge is terminated is 0.9V. 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 common parameters of 18650 lithium batteries?