Why is the voltage of a rechargeable battery 1 2V?

The battery voltage is related to the production material, such as zinc-manganese dry battery, lead-acid battery, 2V, lithium battery. The commonly used rechargeable battery is nickel-cadmium or nickel-metal hydride, and its standard voltage is.

A rechargeable battery is a rechargeable battery that can be charged a limited number of times and is used in conjunction with a charger. No. 5 and No. 7 are generally sold in the market, but there are also No. 1s. The benefits of rechargeable batteries are economical, environmentally friendly, sufficient power, suitable for high-power, long-term use of electrical appliances (such as walkmans, electric toys, etc.).

The voltage of the rechargeable battery is lower than that of the disposable battery of the same model, the AA battery (5 gauge charge) is volt, and the 9V rechargeable battery is actually volt. Now the general charging times can be about 1000 times. As of February 2012, there are only five:

Nickel-cadmium, nickel-metal hydride, lithium-ion, lead-storage, lithium iron.

is the nominal voltage. After the rechargeable battery is fully charged, the voltage is around the left, and then the rechargeable battery generally has low internal resistance, so even if the voltage drops to the general electrical appliances, it can still be used normally.

After the rechargeable battery is fully charged, the voltage is on the left and right, the rechargeable battery generally has low internal resistance, even if the voltage drops, its output power is basically unchanged, and the electrical appliances can still be used normally.

The voltage of the battery is related to the anode material and the cathode material, the anode of the general dry battery is a carbon rod, the cathode is zinc, the ionization tendency of these two substances is close to the voltage, the general rechargeable battery anode cathode ionization tendency is about 4V.

Electrical appliances using dry batteries should consider the battery utilization rate when designing, and generally each battery voltage of more than 1V can work normally.

This is determined by design specifications and production standards.

Some rechargeable batteries, Nanfu No. 5 rechargeable lithium battery rated battery is.

1. The open-circuit voltage of various batteries (the potential difference between the positive and negative electrodes when not discharging) is determined by the positive and negative electrodes of the battery and the electrolytic materials. Further, it is determined by the electrochemical inverse of different materials. As long as the positive and negative electrode materials are the same, the voltage is the same no matter how large the battery is and how large the capacity is.

2. Common positive and negative electrode materials of batteries:

1) Dry cell (alkaline zinc-manganese battery, zinc-manganese battery, carbon-zinc battery, etc., manganese or manganese dioxide + zinc-) voltage;

2) NiMH Ni-chromium battery;

3) Nickel-zinc battery;

4) Lead-acid battery (lead dioxide + lead-) one unit 2V, car series 12V;

5) Lithium battery, lithium-ion, lithium-ion polymer battery (manganese dioxide + lithium-lithium + lithium-graphite-);

6) Lithium-iron battery (ferrous sulfide + lithium metal-);

7) Lithium iron battery (lithium iron phosphate + graphite-);

3. The previous No. 5 and No. 7 rechargeable batteries are basically nickel-metal hydride and nickel-chromium batteries, so the output voltage is all;

4. Nanfu No. 5 rechargeable lithium battery reduces the voltage from a step-down circuit on the basis of a lithium-ion polymer cell, and because the original voltage is high, it can achieve constant voltage output.

These are two different types of batteries:

1. Volt is a one-time battery, which cannot be charged repeatedly, it is alkaline and acidic.

2. Volt is a rechargeable battery, which can be used repeatedly many times, and it is divided into nickel-cadmium and nickel-metal hydride.

At present, the common rechargeable batteries are nickel-cadmium batteries and nickel-metal hydride batteries, and their terminal voltages are both. The lead-acid battery is 2V, the rechargeable lithium battery is, and the zinc-manganese dry battery is.

The open-circuit voltage of a rechargeable battery (the potential difference between the positive and negative electrodes when not discharging) is determined by the positive and negative electrodes of the battery and the electrolytic material. This is determined by the electrochemical inverse of different materials. In other words, as long as the positive and negative electrode materials are the same, the voltage is the same no matter how big the battery is and how large the capacity is.

And it's just nominal, not the actual voltage. For example, nickel-chromium and nickel-metal hydride batteries, nominally, are charged or even higher, and the discharge can be up to 1V.

For ordinary people, whether it is a rechargeable lithium battery, a lithium iron phosphate battery, a nickel-cadmium battery, a nickel-metal hydride battery, an iron-nickel battery, a 2V lead-acid battery, and other batteries cannot be charged with a 5V chargerOnly lithium batteries with a protection board can be charged with a 5V charger。Charging the battery with an output 5V charger will cause the charging current to be too large, causing damage to both parties, and if the charging time is too long, the battery will be charged ......and so on. So be sure to use the matching charger to charge.

It is definitely not possible to charge a 12V battery with a 5V voltage, and the current is the same as water, which will only flow from high potential energy to low potential energy, so after the power supply with a 5V voltage is connected to a 12V battery, the current will only flow from the 12V battery to the 5V power supply, which is equivalent to the battery charging the 5V power supply. Conversely, a 12V power supply can charge a 5V battery, but the charging current must be controlled to ensure that the battery is not charged.

Because of the different materials, construction, service life, and uses used.

1. The materials used are different.

Ordinary batteries are generally dry batteries, widely used are zinc-manganese dry batteries, the middle is a positive carbon rod, a mixture of graphite and manganese dioxide is covered, and then a layer of fiber net, the net is coated with a very thick electrolyte paste, which is composed of ammonium chloride dissolved liquid and starch, and a small amount of preservatives.

2. The structure is different.

Its internal structure determines that the open circuit voltage of the two is different, the nominal voltage of nickel-metal hydride and nickel-cadmium rechargeable battery is, the nominal voltage of ordinary single battery is, the nominal voltage of lithium-ion rechargeable battery is, and the lead-acid battery is 12V.

3. The service life is different.

The rechargeable battery can be charged and discharged many times, and can be completely charged and discharged about 200 times, while the ordinary battery is a disposable product, but both can not be discarded at will after being discarded, and should be classified**, otherwise it will cause pollution.

4. Different uses.

Dry batteries are not only suitable for flashlights, semiconductor radios, cassette recorders, cameras, electronic clocks, toys, etc., but also for national defense, scientific research, telecommunications, navigation, aviation, medicine and other fields in the national economy, which is very easy to use.

The rechargeable battery is generally, and as a rechargeable battery, you have to give it a higher voltage than itself, so that the electricity can be charged, so the rechargeable battery is about 1 5 voltage reduced on the basis of the standard voltage, so the rechargeable battery voltage is.

The output voltage of the battery = the electrode potential difference between the two electrode materials of the battery, the potential difference between manganese and zinc electrodes in manganese-zinc dry batteries is about, and the electrode potential difference between nickel and cadmium, lithium and hydrogen metallization in rechargeable batteries is about.

Commonly used parameters. Battery capacity represents how much power the battery can store, and the number we see on the outer packaging of the battery generally refers to the battery capacity identification. Expressed in ampere-hours or milliampere-hours.

It is a composite unit that is constructed of the product of current units and time units and represents the ability of a battery to continuously discharge at a constant current. A fully charged battery can last for 10 hours when discharged with a current of 200mA, multiplying the current by the time we can get the capacity of this battery is. If you discharge it with 400mA, the usable time is 5 hours.

Sum means that the voltage of the battery is and.

v=voltage (voltage, unit: volts) refers to the voltage difference between the positive and negative terminals of the battery.

Refers to the nominal voltage of the battery.

For example, generally speaking, the nominal voltage of nickel-metal hydride batteries is either alkaline dry batteries or carbon dry batteries.

It means that the voltage in the battery is sum, and V (volt) is the unit of voltage.

The sum on the battery is the voltage of the battery.

V, volt, is the unit of electricity. The volts of the battery are different. That is, it indicates how many volts this battery is.

The battery charging voltage is voltile. Bright bucket.

Generally, the rated voltage of the charging output of the charger is about twice that of the battery being charged, and the charging termination voltage (limiting voltage) of the battery is about. The charging current of the battery is related to the design of the charger itself, which is generally calculated according to the capacity of the battery 10%-20%, and the charging current should be about 115mA-230mA for the battery capacity.

Battery Charging Method:

1. Please confirm that the battery has been completely discharged. Nicads perform best when charging from a completely blank state.

2. Check to make sure you have the appropriate type of charger – NiMd batteries will not be charging NiMH batteries, which is a different formula designed for the charger properly. It is important to make sure that your charger is capable of handling nicads, as mismatches may result in ** or fire chemistry. Some chargers give support options in this case - there will be a switch to select nicads.

3. Select the speed of your charging time. Nickel-cadmium batteries are best charged over a longer period of time, but some chargers give you the option to speed up the charge. Over time, this will drag down the life of the battery.

4. Charge your battery. This can take up to 12 hours. <>