source:other news
release time:2023-10-09
Hits:0
Popular:

Lithium batteries cannot be made into a large one, so we have to organize many small cells together, and everyone can work together with sincerity, even if we can take electric vehicles to fly. At this point, we need to face the issue of consistency.
Our daily experience is that two dry batteries, with the positive and negative poles connected, can emit light from a flashlight. Who cares if they are consistent or inconsistent. The large-scale application of lithium batteries is not so simple.
The inconsistency of lithium battery parameters mainly refers to the inconsistency of capacity, internal resistance, and open circuit voltage. Inconsistent battery cell strings used together can cause the following problems.
1) Capacity loss refers to the formation of a battery pack consisting of individual cells, which conforms to the "barrel principle" in terms of capacity. The capacity of the worst cell determines the capacity of the entire battery pack.
To prevent overcharging and discharging of the battery, the logic of the battery management system is set as follows: during discharge, when the lowest individual voltage reaches the discharge cut-off voltage, the entire battery pack stops discharging; When charging, stop charging when the highest unit voltage touches the charging cutoff voltage.
Take two batteries connected in series as an example. One battery has a capacity of 1C, while the other has a capacity of only 0.9C. In a series connection, two batteries pass through the same amount of current.
When charging, batteries with small capacity must first be fully charged, reaching the charging cut-off condition, and the system will no longer continue to charge. When discharging, batteries with small capacity will inevitably discharge all available energy first, and the system will immediately stop discharging.
In this way, cells with small capacity are always fully charged and discharged, while cells with large capacity are always using a portion of their capacity. A portion of the entire battery pack's capacity is always idle
2) Life loss, similarly, the lifespan of a battery pack is determined by the battery cell with the shortest lifespan. It is highly possible that the battery cell with the shortest lifespan is the one with a small capacity. Small capacity battery cells are always fully charged and discharged, with excessive output, which is likely to reach the key point of their lifespan first. As the lifespan of the battery cells comes to an end, a group of battery cells welded together will die with it.
3) As the internal resistance increases, different internal resistances flow through the same current, and cells with high internal resistance generate relatively more heat. If the battery temperature is too high, it will accelerate the degradation rate and further increase the internal resistance. Internal resistance and temperature rise form a pair of negative feedback, accelerating the degradation of high internal resistance cells.
Read recommendations:
lithium deep cycle marine battery wholesale
Marine Boat 12V 24V 36V Deep Cycle RV Lithium LiFePo4 Battery for Trolling Motor
How to maintain power lithium batteries in winter.solar powered electric generator
Last article:Understanding and Analysis of Energy Storage Lithium Battery Technology.portable solar power station
Next article:Why are most lithium-ion batteries small.best battery for solar panel
related suggestion
lithium deep cycle marine battery maker
2023-03-22solar power battery storage Manufacturing
2023-04-07solar battery for house direct sales
2023-03-20lifepo4 battery 12v Production
2023-04-07lifepo4 solar battery company
2023-04-07marine battery for trolling motor Manufacturing
2023-04-07lifepo4 solar battery
2023-05-0824 volt deep cycle battery
2023-05-08lithium marine batteries
2023-05-08trolling motor battery
2023-05-08lifepo4 power station
2023-05-08best marine battery
2023-05-0876.8V 37.5Ah LiFePO4 Battery for Electric Motorcycles
2025-05-21Lithium Ion Battery 18650 Pack 11.1V 2000mAh
2025-05-10High Temperature Lithium Battery 18650 26650 Cell
2022-10-18Low Temperature Lithium Battery 26650 Cell
2022-10-1851.2V 200Ah Wall Mounted Battery Pack for Home Energy Storage System
2023-06-19The advantages of 18650 cylindrical lithium battery
2022-10-12What are the advantages and disadvantages of lithium titanate batteries?lithium trolling motor battery manufacture
2023-03-28How is different types of batteries recycling?
2022-10-21Why Golf Cart Batteries Won't Charge After Winter: Troubleshooting & Prevention Guide
2025-06-04How to Choose the Best 48V Golf Cart Batteries
2025-03-12Lithium battery pollution.lithium marine batteries manufacture
2023-03-28Lithium battery PACK processing needs attention matters.48v lithium golf cart battery
2023-03-09Maintenance knowledge of aviation model lithium battery.solar battery storage system
2023-07-06Lithium battery fault detection.solar powered battery pack
2023-07-03Is the zinc fierce battery be eliminated?
2023-04-12