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:
home solar battery system Factory
solar powered generator for camping
Lithium Polymer Battery Pack for Smart Home Device
Can You Put 48V Batteries in a 36V Golf Cart?
Polymer lithium battery research cutting edge
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
lifepo4 24v sales
2023-04-07solar power battery storage wholesale
2023-04-07home solar battery system Processor
2023-04-07lifepo4 battery 12v company
2023-04-07lithium batteries for solar panels manufacturer
2023-03-22deep cycle marine battery wholesale
2023-03-20portable battery generators
2023-05-0812v deep cycle battery
2023-05-08solar energy storage
2023-05-08marine batteries for sale
2023-05-08lithium deep cycle marine battery
2023-05-08trolling motor battery
2023-05-0851.2V 800Ah 600Ah 200Ah 100Ah Modular Stackable Rack Mount Energy Storage System
2023-02-21Home Appliance 3.7V Lithium Polymer Lipo Battery Pack
2023-02-143000 Cycles Na-ion Sodium-ion Battery Pack 18650 26700 12V 24V 36V 48V
2023-08-043.7V NCM 50Ah Semi Solid State Pouch Battery
2025-08-15Rechargeable Lithium Ion Battery Pack for Medical Device
2022-10-18Why Golf Cart Batteries Won't Charge After Winter: Troubleshooting & Prevention Guide
2025-06-04Which is better for lithium batteries and lead -acid batteries?lithium batteries for solar panels direct sales
2023-04-07Choosing the Best 12V 100Ah Lithium Battery for Trolling Motors
2025-05-22Navigating the Market for Bulk Used 18650 Batteries: Opportunities and Considerations
2025-03-13Lithium battery tram.solar power battery storage
2023-07-03Introduction to lithium battery and battery.lithium batteries for solar panels wholesaler
2023-04-11The Effect and Mechanism of Fast Charging on the Performance of Graphite Negative Electrode in Mobile Phone Batteries
2023-10-08The significance of a high -power battery.deep cell marine battery direct sales
2023-04-14How to analyze the temperature environment adaptation of polymer batteries?golf cart batteries price
2023-08-23What are the usage areas of lithium-ion batteries?
2023-06-27