LR44 battery

LR44 battery voltage range and battery discharge curve

LR44 battery manufacturers explain the voltage range of lithium-ion batteries and the discharge curve of lithium-ion batteries. The theoretical standard voltage of the battery is determined by the difference between the standard electrode potential of the positive electrode and the standard electrode potential of the negative electrode; the discharge curve is one of the basic methods for studying battery performance. According to the discharge curve, it can be judged whether the battery performance is stable and the maximum current allowed when the battery is working stably. The following is an explanation of the voltage range of lithium-ion batteries and the discharge curve of lithium-ion batteries by LR44 battery manufacturers.

LR44 battery manufacturers explain the voltage range of lithium-ion batteries

1. Voltage range of lithium-ion batteries

The voltage range of lithium-ion batteries is 3.0 to 4.2V, and the nominal voltage is 3.7V.

Lithium-ion batteries have a very useful characteristic for power metering, that is, when discharging, the battery voltage will gradually decrease with the loss of power, and there is a considerable slope, which provides us with another approximate way of power metering. The method of taking battery voltage is similar to the principle that measuring the height of the water surface in a water tank can roughly estimate the amount of water remaining. However, in fact, the voltage of a battery is much more complicated than measuring the height of the calm water surface in a water tank.

There are several instabilities in using voltage to estimate the remaining capacity of a battery:

1. For the same battery, under the condition of the same remaining capacity, the voltage value changes due to the size of the discharge current; the larger the discharge current, the lower the voltage, and the voltage is highest when there is no current;

2. The influence of ambient temperature on battery voltage. The lower the temperature, the lower the voltage of the battery with the same capacity;

3. The influence of cycling on the battery discharge platform. As the cycle progresses, the discharge platform of lithium-ion batteries tends to deteriorate and decrease, so the capacity represented by the same voltage also changes accordingly;

4. Lithium-ion batteries of different manufacturers and different capacities have slightly different discharge platforms;

5. Lithium-ion batteries with different types of electrode materials have large differences in discharge platforms. The discharge platforms of cobalt lithium and manganese lithium are completely different.

2. LR44 battery discharge curve

The discharge curve refers to the curve of the change of battery voltage, current, capacity, etc. over time during the discharge process. The information contained in the charge and discharge curve is very rich, including capacity, energy, working voltage and voltage platform, the relationship between electrode potential and state of charge, etc. The important data recorded during the discharge test is the time evolution of current and voltage, and many parameters can be obtained from these basic data.

Basic principle of discharge test: After understanding the voltage of the battery, we begin to analyze the discharge curve of the LR44 battery. The discharge curve basically reflects the state of the electrode, which is the superposition of the changes in the state of the positive and negative electrodes; during the charge and discharge test, the equipment applies a certain load to the battery, and records the evolution of voltage over time and the evolution of current over time according to the set data recording conditions.

The voltage curve of the LR44 battery can be divided into three stages during the entire discharge process:

1. The battery terminal voltage drops rapidly in the initial stage. The greater the discharge rate, the faster the voltage drops;

2. The battery voltage enters a slowly changing stage. This period of time is called the platform area of the battery. The smaller the discharge rate, the longer the platform area lasts, the higher the platform voltage, and the slower the voltage drops;

3. When the battery is almost discharged, the battery load voltage begins to drop sharply until it reaches the discharge cut-off voltage.

When a LR44 battery is discharged, its operating voltage will always change over time. The curve drawn with the battery's operating voltage as the ordinate and the discharge time, or capacity, or state of charge, or discharge depth as the abscissa is called a discharge curve. To understand the battery's discharge characteristic curve, we must first understand the battery's voltage in principle.

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