R6 Carbon battery

Analysis of balanced charging and parallel balanced charging methods for R6 Carbon battery packs

Balancing is a key technology to solve the differences in R6 Carbon battery pack monomers. This article focuses on the use of power lithium batteries in groups. Each R6 Carbon battery requires protection against charging overvoltage, discharging undervoltage, overcurrent, and short circuit. During the charging process, the whole group of batteries must be balanced. The design of a battery pack protection board with balanced charging function to protect any number of lithium batteries in series. What is charging balance? Principle of balanced charging of R6 Carbon battery packs Charging balance, referred to as balanced charging, is charging to balance battery characteristics. It means that during the use of batteries, the battery terminal voltage is unbalanced due to individual differences in batteries, temperature differences, etc. In order to avoid the deterioration of this unbalanced trend, it is necessary to increase the charging voltage of the battery pack and activate the battery to achieve balanced characteristics of each battery in the R6 Carbon battery pack and extend the battery life. Maintenance method.

The R6 Carbon battery pack is composed of multiple single lithium batteries in series. Due to the differences in monomers, the terminal voltage rise is inconsistent during series charging, which will cause some monomers to be overcharged and some monomers to be undercharged. All batteries are connected in parallel during balanced charging, and in series during conventional charging and power consumption. During balanced charging, the voltage of all batteries in parallel is equal, and forced balance of each battery is achieved.

Balanced charging method for R6 Carbon battery pack When the R6 Carbon battery pack is produced and stored for a long time, the voltage of each string of batteries in the whole battery pack is inconsistent due to the different static power consumption of each circuit of the protection board and the different self-discharge rate of each battery cell. Balance has the function of equalizing the voltage of the R6 Carbon battery pack, so as to achieve the full charge and full discharge of the battery pack capacity, so that the battery pack can play the maximum effect.

Commonly used balanced charging technologies for R6 Carbon battery packs include constant shunt resistor balanced charging, on-off shunt resistor balanced charging, average battery voltage balanced charging, switch capacitor balanced charging, buck converter balanced charging, inductor balanced charging, etc. When charging a group of lithium batteries in series, each battery should be charged evenly, otherwise it will affect the performance and life of the whole battery pack during use.

1. Attach a parallel balancing circuit to each single cell of the R6 Carbon battery pack to achieve the function of shunt. In this mode, when a battery reaches full charge first, the balancing device can prevent it from overcharging and convert the excess energy into heat energy to continue charging the uncharged battery. This method is simple, but it will cause energy loss and is not suitable for fast charging systems.

2. Before charging, discharge each monomer one by one through the same load to the same level, and then charge it with a constant current to ensure a more accurate balance between each monomer. However, for battery packs, due to the physical differences between individuals, it is difficult to achieve completely consistent ideal effects after deep discharge of each monomer. Even if the same effect is achieved after discharge, new imbalances will occur during the charging process.

3. Timing, sequencing, and individual detection and uniform charging of the monomer batteries in the R6 Carbon battery pack. When charging the R6 Carbon battery pack, it can ensure that each R6 Carbon battery in the battery pack will not be overcharged or over-discharged, thereby ensuring that each battery in the R6 Carbon battery pack is in normal working condition.

4. Using the time-sharing principle, through the control and switching of the switch component, the additional current flows into the battery with relatively low voltage to achieve the purpose of balanced charging. This method is relatively efficient, but the control is relatively complex.

5. Take the voltage parameters of each battery as the balancing object to restore the voltage of each battery to consistency. During balanced charging, the capacitor is alternately connected to two adjacent batteries through the control switch, accepts the charge of the high-voltage battery, and then discharges to the low-voltage battery until the voltages of the two batteries tend to be consistent. This equalization method solves the problem of unbalanced battery voltage, but this method is mainly used in situations where the number of batteries is small.

6. The entire system is controlled by a single-chip microcomputer, and each single battery has an independent set of modules. The module manages the charging of each single battery according to the set program, and automatically disconnects after charging is completed. This method is relatively simple, but when there are many single batteries, the cost will be greatly increased, and it is not conducive to reducing the size of the system.

Parallel balanced charging method of R6 Carbon battery pack

1. Diode isolation parallel charging equalization method Take 6 single batteries in series as an example, disconnect switches S1-S5 and then connect the charging power supply. The diode is selected as 1N5401-5408. The measured forward voltage drop of the diode is 0.8V at the rated current of 3A. The current flowing through the diode is very small when the forward voltage drop is 0.7V. The maximum charging voltage of lithium iron phosphate battery is 3.65V. In fact, considering the extension of battery life, the maximum charging voltage is set to 3.5V. The charging voltage = 3.5 + 0.7 + 0.7 = 4.9V plus the line voltage drop, it is very suitable to use a 5V power supply.

2. Direct parallel charging equalization method The charging voltage of lithium iron phosphate battery is 3.5-3.6V, and the ternary and polymer batteries are 4.1-4.2V. The red alligator clip leads are welded together to the positive pole of the charging power supply; the black alligator clip leads are welded together to the negative pole of the charging power supply. When equalizing charging, first disconnect S1-S5, the red alligator clips clamp the positive poles of each single battery respectively; the black alligator clips clamp the negative poles of the single battery respectively, and all batteries are connected in parallel.

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