Precautions for the latest technology of Alkaline Dry Battery
2021-08-11
Rechargeable alkaline zinc-manganese battery (rechargeablealkaline zinc-manganese battery) An improved alkaline zinc-manganese battery that can be used repeatedly by charging, referred to as RAM. The structure and manufacturing process of this kind of battery are basically the same as the alkaline zinc manganese battery.
In order to be rechargeable, the battery has been improved on the basis of alkaline zinc-manganese batteries: ① Improve the structure of the positive electrode, increase the strength of the positive electrode ring or add additives such as binders to prevent the positive electrode from swelling during charging and discharging; ② Through the positive electrode Doping to improve the reversibility of manganese dioxide; ③Control the amount of zinc as the negative electrode active material, and control the discharge of manganese dioxide at only 1 electron; ④Improve the isolation layer to prevent zinc dendrites from penetrating the isolation layer and short-circuit when the battery is charged .
The charge-discharge cycle performance of the rechargeable alkaline zinc-manganese battery is poorer than that of the traditional secondary battery, and the charge-discharge system has a great influence on the cycle life of the battery. The full charge and discharge cycle life is only about 50 times. Do not over-discharge when using this kind of battery, shallow discharge can greatly improve the cycle life of the battery. The discharge reaction of the battery is the same as that of the alkaline zinc-manganese primary battery, and the reverse reaction of the discharge reaction occurs during charging:
MnOOH+Zn(OH)2→Zn+MnO2+H2O
Due to the short cycle life of batteries, development is restricted. Only a few companies in the United States and Canada have large-scale production in the world. my country also produces such batteries, but the production and export volume are small.
capacity
The capacity of alkaline batteries is higher than that of carbon batteries. The reason is that the manganese dioxide used as the cathode has higher purity and density, and the internal parts (such as electrodes) are smaller in volume, which also frees up space, which helps increase the capacity. The capacity is 3 to 5 times more than that of carbon batteries. However, the capacity of alkaline batteries will decrease as the output current increases. For example, the same battery can have a capacity of 3000mAh at low output current, but when used in a load of 1A current, the capacity will only be 700mAh, which is less than 1/4 of the original.
Voltage
The electromotive force (e.m.f) of a single alkaline battery, that is, the voltage when there is no load is generally 1.5V, but with different manganese dioxide and zinc oxide, the voltage will vary between 1.5V and 1.65V. When the load is connected, the voltage will drop with the increase of the output current, and the voltage will drop to about 1.1V to 1.3V under normal load.
Current
Alkaline batteries can output more current than carbon batteries, but smaller than ordinary storage batteries. Alkaline batteries with larger capacity can output larger currents because the electrode area increases and more substances can produce chemical reactions at the same time. Excessive current will heat up the battery during the discharge process. Generally, AA batteries can output 700mA current without heating up significantly, while larger models of C and D batteries can withstand greater current without heating up significantly.
Leaking electrolyte
Alkaline batteries stored for a long time will leak the electrolyte. Because the electrolyte is a corrosive alkaline substance, potassium hydroxide, it will irritate the eyes, respiratory tract and skin; the electrolyte will also corrode metals and damage electronic parts, so Electrolyte leaking from the battery can also damage the products that use the battery, especially electronic products.
Do not charge alkaline batteries
Charging alkaline batteries can also cause the battery to leak electrolyte, or even rupture the battery. A very small number of alkaline batteries are designed to be rechargeable, but they can only be charged with a relatively small current. It often takes a full day or more to achieve an obvious charging effect, and the number of recharges is not many, which is quite inconvenient. So it has been difficult to find in the market. There are also chargers that claim to be able to charge ordinary disposable alkaline batteries, but such products cannot guarantee the performance of the fully charged battery.
Use batteries of the same model and capacity
When using more than one battery, use the same model or even the same brand of batteries; avoid mixing old and new batteries together. Otherwise, the risk of electrolyte leakage will increase.
Store separately when not in use
When the battery-operated device is not in use, the battery should be taken out and stored separately to avoid damage to the battery-operated device when the electrolyte leaks out of storage for too long.
In order to be rechargeable, the battery has been improved on the basis of alkaline zinc-manganese batteries: ① Improve the structure of the positive electrode, increase the strength of the positive electrode ring or add additives such as binders to prevent the positive electrode from swelling during charging and discharging; ② Through the positive electrode Doping to improve the reversibility of manganese dioxide; ③Control the amount of zinc as the negative electrode active material, and control the discharge of manganese dioxide at only 1 electron; ④Improve the isolation layer to prevent zinc dendrites from penetrating the isolation layer and short-circuit when the battery is charged .
The charge-discharge cycle performance of the rechargeable alkaline zinc-manganese battery is poorer than that of the traditional secondary battery, and the charge-discharge system has a great influence on the cycle life of the battery. The full charge and discharge cycle life is only about 50 times. Do not over-discharge when using this kind of battery, shallow discharge can greatly improve the cycle life of the battery. The discharge reaction of the battery is the same as that of the alkaline zinc-manganese primary battery, and the reverse reaction of the discharge reaction occurs during charging:
MnOOH+Zn(OH)2→Zn+MnO2+H2O
Due to the short cycle life of batteries, development is restricted. Only a few companies in the United States and Canada have large-scale production in the world. my country also produces such batteries, but the production and export volume are small.
capacity
The capacity of alkaline batteries is higher than that of carbon batteries. The reason is that the manganese dioxide used as the cathode has higher purity and density, and the internal parts (such as electrodes) are smaller in volume, which also frees up space, which helps increase the capacity. The capacity is 3 to 5 times more than that of carbon batteries. However, the capacity of alkaline batteries will decrease as the output current increases. For example, the same battery can have a capacity of 3000mAh at low output current, but when used in a load of 1A current, the capacity will only be 700mAh, which is less than 1/4 of the original.
Voltage
The electromotive force (e.m.f) of a single alkaline battery, that is, the voltage when there is no load is generally 1.5V, but with different manganese dioxide and zinc oxide, the voltage will vary between 1.5V and 1.65V. When the load is connected, the voltage will drop with the increase of the output current, and the voltage will drop to about 1.1V to 1.3V under normal load.
Current
Alkaline batteries can output more current than carbon batteries, but smaller than ordinary storage batteries. Alkaline batteries with larger capacity can output larger currents because the electrode area increases and more substances can produce chemical reactions at the same time. Excessive current will heat up the battery during the discharge process. Generally, AA batteries can output 700mA current without heating up significantly, while larger models of C and D batteries can withstand greater current without heating up significantly.
Leaking electrolyte
Alkaline batteries stored for a long time will leak the electrolyte. Because the electrolyte is a corrosive alkaline substance, potassium hydroxide, it will irritate the eyes, respiratory tract and skin; the electrolyte will also corrode metals and damage electronic parts, so Electrolyte leaking from the battery can also damage the products that use the battery, especially electronic products.
Do not charge alkaline batteries
Charging alkaline batteries can also cause the battery to leak electrolyte, or even rupture the battery. A very small number of alkaline batteries are designed to be rechargeable, but they can only be charged with a relatively small current. It often takes a full day or more to achieve an obvious charging effect, and the number of recharges is not many, which is quite inconvenient. So it has been difficult to find in the market. There are also chargers that claim to be able to charge ordinary disposable alkaline batteries, but such products cannot guarantee the performance of the fully charged battery.
Use batteries of the same model and capacity
When using more than one battery, use the same model or even the same brand of batteries; avoid mixing old and new batteries together. Otherwise, the risk of electrolyte leakage will increase.
Store separately when not in use
When the battery-operated device is not in use, the battery should be taken out and stored separately to avoid damage to the battery-operated device when the electrolyte leaks out of storage for too long.
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