Briefly introduce the balanced charging method and principle of the button battery 2025 protection board

When the button battery 2025 is produced and stored for a long time, due to the different static power consumption of each circuit of the protection board and the different self-discharge rate of each battery cell, the voltage of each string of the whole battery pack is inconsistent. Balancing has the function of equalizing the voltage of the button battery 2025, 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. What is charge equalization? Charge equalization, referred to as equalization, is the charging of equalized battery characteristics. It means that during the use of the battery, the battery terminal voltage is unbalanced due to individual differences and temperature differences of the battery. 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 the balance of the characteristics of each battery in the button battery 2025 and extend the battery life. Maintenance method. Common button battery 2025 balanced charging technology includes constant shunt resistance balanced charging, on-off shunt resistance balanced charging, average battery voltage balanced charging, switch capacitor balanced charging, buck converter balanced charging, inductor balanced charging, etc. When charging lithium batteries in groups in series, each battery should be charged evenly, otherwise the performance and life of the entire battery group will be affected during use. 1. Attach a parallel balancing circuit to each single cell of the lithium battery group to achieve the effect of current diversion. In this mode, when a battery is fully charged 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 single cell one by one through the same load to the same level, and then charge it with constant current to ensure a more accurate balance between each single cell. 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 single cell. 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 single cells in the button battery 2025. When charging the button battery 2025, it can ensure that each lithium battery in the battery pack will not be overcharged or over-discharged, thereby ensuring that each battery in the button battery 2025 is in normal working condition. 4. Using the time-sharing principle, through the control and switching of the switch components, 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. The voltage parameters of each battery are used as the balancing object to restore the voltage of each battery to the same level. During balanced charging, the capacitor is alternately connected to the 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 voltage of the two batteries tends to be consistent. This balancing method solves the problem of unbalanced battery pack voltage well, but this method is mainly used in occasions with a small number of batteries. 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 separately according to the set program, and automatically disconnects after charging is completed. This method is relatively simple, but when the number of single batteries is large, the cost will be greatly increased, and it is not conducive to reducing the size of the system. Balanced charging principle of button battery 2025 protection board The number of single-cell lithium battery protection chips is determined according to the number of batteries in the button battery 2025, and they are used in series to protect the corresponding single-cell lithium battery from charging, discharging, overcurrent, and short circuit. While providing charging protection, the system controls the on and off of the shunt discharge branch switch device through the protection chip to achieve balanced charging. This solution is different from the traditional method of achieving balanced charging at the charger end, which reduces the cost of button battery 2025 charger design and application. The button battery 2025 is composed of multiple single lithium batteries in series. Due to the differences of the single cells, the terminal voltage rise is inconsistent during series charging, which will cause some single cells to be overcharged and some single cells 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, achieving forced balance of each battery. The above is the method and principle of balanced charging of the button battery 2025 protection board. 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 entire battery pack during use.

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