Introduction to the 7th battery capacity standard

The 7th battery is qualitatively divided, including a 7th battery and a secondary 7th battery. The 7th battery capacity is therefore divided into a 7th battery capacity and a secondary 7th battery capacity.

The primary battery that can be made into the shape of No. 7 is divided into a carbon battery and an alkaline battery. Generally, their discharge capacity refers to the length of time from the nominal voltage (1.5 V) discharge to the termination voltage (0.9 V), and the measurement method is Constant resistance discharge, how often the battery is discharged, refers to the capacity under the 3.9 Ω discharge system.

No. 7 carbon battery capacity: According to IEC standards, carbon power batteries can be divided into three types: P type (high power battery), C type (high capacity battery) and the first generation S type paste battery.

The S-type battery has been eliminated, and a C-type cardboard battery has been developed on the basis of it. The latter replaces natural manganese with 30-70% of high-activity manganese, and the positive electrode filling amount is increased by 30%, so the capacity is improved. C-type batteries are often used in small current discharge applications, such as clocks, remote controls, radios, flashlights, etc. The P-type battery positive electrode adopts high-activity manganese, and its performance is greatly improved. It can be used for high-current discharge, such as camera and flash. However, due to the higher market share of alkaline batteries, P-type batteries are now mainly used for the original C model battery market and the C-type battery basically exited the market.

The capacity of No. 7 carbon battery differs depending on the formula of the battery manufacturer. Under the 3.9 Ω discharge system, generally between 25 and 35 minutes, Dongguan LARGE has an environmentally friendly carbon battery with a nominal discharge time of 35 minutes. The actual discharge is close to 40 minutes, which is a relatively high capacity No. 7 carbon battery.

No. 7 alkaline battery capacity: In the 3.9 Ω discharge mode, the capacity of the 7th alkaline battery can generally reach 4 to 5 times the capacity of the 7th carbon battery. In terms of numerical performance, the discharge time is prolonged. The model battery discharge time is 2.6 hours. At the same time, the structural characteristics of the alkaline battery are more resistant to large current discharge. Therefore, the battery discharge time of 500mAh is about 55 minutes. If the battery is switched to a small current, the capacity of the 7th battery is about 800~1200mAh.

The secondary battery which can be made into the shape of No. 7 has a nickel-cadmium battery and a nickel-hydrogen battery, and the capacity of the secondary battery is MAH, or Ah, which indicates the durability time at a certain discharge current.

No. 7 nickel-cadmium battery capacity: its nominal voltage is 1.2V, and the termination voltage is 1.1V with an 8-hour rate. Under this condition, the designed capacity of the nickel-cadmium battery is less than 500mAh, but the cadmium pollutes the environment and is charging. After a certain number of discharges, the power will drop to 80%, and the life is less than that of the same type of nickel-hydrogen. Therefore, it is being completely replaced by nickel-metal hydride batteries and exiting the market.

No. 7 Ni-MH battery capacity: The nominal voltage of Ni-MH battery is 1.2V, the termination voltage is 1.0V, and the capacity of mainstream No. 7 Ni-MH battery can reach 650~800mAh.

Since nickel-hydrogen batteries occupy the original market of nickel-cadmium batteries, and have their own new market, they have become the new darling of the market. It is inevitable that some irrational behaviors will occur. At present, it is quite good to achieve 800mAh in China. If it encounters more than 1000mAh, it may be a virtual standard. Because the capacity of the No. 7 nickel metal hydride battery is ultimately determined by its material.

The page contains the contents of the machine translation.