What is the battery pack balance maintenance instrument and what is the purpose? -Lithium - Ion Battery Equipment
What is a lithium-ion battery pack balance maintenance instrument? what is it used for? With the rapid expansion of the new energy vehicle market, the phenomenon of "squatting" in the use of urban electric buses has become prominent. This not only shortens the cruising range of new energy vehicles, but also affects the service life of electric vehicles due to the "premature aging" of battery life. Lithium-ion battery balance maintenance instrument is a portable product for dealing with outdated single batteries in daily maintenance. It is mainly used for quick battery maintenance and automatic daily maintenance. It fundamentally solves the pain point of "premature aging" of the service life of new energy vehicles.
What is a lithium-ion battery pack balance maintenance instrument?
The so-called balanced voltage is charging to balance the characteristics of the battery. It means that during the use of the battery, the battery terminal voltage is unbalanced due to individual differences in the battery, temperature differences, etc. In order to prevent the deterioration of this unbalanced trend, it is necessary to improve the battery The charging voltage of the battery pack is used to activate and charge the battery. Lithium-ion battery pack balancer is a new energy vehicle lithium-ion battery pack maintenance equipment, it can effectively solve the problem that the service life of new energy vehicles is not long, but the cruising range is reduced due to the difference in battery pack power.(Lithium - Ion Battery Equipment)
Its important design idea is to use intelligent algorithms to analyze and judge the deep-seated problems of the battery pack by collecting the parameters of the single battery. Adopt the method of "series charging and supplementing" to replenish the backward batteries to ensure that each string of single batteries is fully charged, and maintain the power difference between the single batteries in the group to the factory level. Thereby eliminating the short-board effect of the battery pack, and restoring the capacity of the entire battery pack to close to the factory level.
The principle of the balance maintenance instrument for lithium-ion battery packs is equivalent to connecting each single battery with a high-precision charger for separate charging, so as to realize differentiated on-demand charging of single batteries and restore the entire capacity of the battery pack. At present, the common equalization technologies for lithium-ion battery packs mainly include three types: energy-consuming passive equalization, charging equalization, and transfer-type active equalization. In terms of development difficulty, cost, equalization efficiency, and power utilization, passive equalization is the easiest to develop and the lowest cost. , the equalization current is very small, the equalization efficiency is low, and the power utilization rate is zero.
What is the purpose of the lithium-ion battery pack balance maintenance instrument?
1. Overcharge protection purpose: Overcharge protection purpose means that when a certain working voltage is reached, it is strictly forbidden to be recharged by the charger. The MOS tube that is about to be overcharged will enter the off state and stop charging.
2. The purpose of power loss maintenance: the purpose of overcharge and discharge protection is to stop charging and discharging the load when the working voltage of the battery is reduced. Put the power-deficient MOS tube into the off state, and strictly prohibit its charging and discharging.
3. The lithium-ion battery pack is composed of multiple identical cells connected in series and parallel. The most important thing in the process is the "identity" of the cells, but each cell cannot be completely consistent, such as internal resistance deviation, capacity deviation , Voltage deviation, charging and discharging curves, etc. will have deviations, so there will be deviations during charging or discharging. This deviation may cause the battery protection board to protect in advance, so that the energy of each battery cell cannot be effectively used. So it is necessary to add a balance board to the battery pack.
4. The protection of lithium-ion batteries is generally carried out by the cooperation of protection circuit boards and current components such as PTC. Lithium-ion battery protection boards are composed of electronic circuits, which can accurately monitor lithium batteries at all times in the natural environment of -40°C to 85°C The working voltage of the core and the current of the charge and discharge control circuit are directly connected to the conduction of the current control circuit; PTC prevents extreme damage to the battery in a high-temperature environment.
What is a lithium-ion battery pack balance maintenance instrument?
The so-called balanced voltage is charging to balance the characteristics of the battery. It means that during the use of the battery, the battery terminal voltage is unbalanced due to individual differences in the battery, temperature differences, etc. In order to prevent the deterioration of this unbalanced trend, it is necessary to improve the battery The charging voltage of the battery pack is used to activate and charge the battery. Lithium-ion battery pack balancer is a new energy vehicle lithium-ion battery pack maintenance equipment, it can effectively solve the problem that the service life of new energy vehicles is not long, but the cruising range is reduced due to the difference in battery pack power.(Lithium - Ion Battery Equipment)
Its important design idea is to use intelligent algorithms to analyze and judge the deep-seated problems of the battery pack by collecting the parameters of the single battery. Adopt the method of "series charging and supplementing" to replenish the backward batteries to ensure that each string of single batteries is fully charged, and maintain the power difference between the single batteries in the group to the factory level. Thereby eliminating the short-board effect of the battery pack, and restoring the capacity of the entire battery pack to close to the factory level.
The principle of the balance maintenance instrument for lithium-ion battery packs is equivalent to connecting each single battery with a high-precision charger for separate charging, so as to realize differentiated on-demand charging of single batteries and restore the entire capacity of the battery pack. At present, the common equalization technologies for lithium-ion battery packs mainly include three types: energy-consuming passive equalization, charging equalization, and transfer-type active equalization. In terms of development difficulty, cost, equalization efficiency, and power utilization, passive equalization is the easiest to develop and the lowest cost. , the equalization current is very small, the equalization efficiency is low, and the power utilization rate is zero.
What is the purpose of the lithium-ion battery pack balance maintenance instrument?
1. Overcharge protection purpose: Overcharge protection purpose means that when a certain working voltage is reached, it is strictly forbidden to be recharged by the charger. The MOS tube that is about to be overcharged will enter the off state and stop charging.
2. The purpose of power loss maintenance: the purpose of overcharge and discharge protection is to stop charging and discharging the load when the working voltage of the battery is reduced. Put the power-deficient MOS tube into the off state, and strictly prohibit its charging and discharging.
3. The lithium-ion battery pack is composed of multiple identical cells connected in series and parallel. The most important thing in the process is the "identity" of the cells, but each cell cannot be completely consistent, such as internal resistance deviation, capacity deviation , Voltage deviation, charging and discharging curves, etc. will have deviations, so there will be deviations during charging or discharging. This deviation may cause the battery protection board to protect in advance, so that the energy of each battery cell cannot be effectively used. So it is necessary to add a balance board to the battery pack.
4. The protection of lithium-ion batteries is generally carried out by the cooperation of protection circuit boards and current components such as PTC. Lithium-ion battery protection boards are composed of electronic circuits, which can accurately monitor lithium batteries at all times in the natural environment of -40°C to 85°C The working voltage of the core and the current of the charge and discharge control circuit are directly connected to the conduction of the current control circuit; PTC prevents extreme damage to the battery in a high-temperature environment.
