source:other news release time:2023-09-18 Hits: Popular:Lithium-ion battery wholesale
The application fields of lithium-ion batteries for long-term storage, such as medical, military, and auxiliary power supplies, make it particularly important for batteries to have good long-term storage performance. The interior of lithium-ion batteries is a relatively complex electrochemical system. After being left unused for a long time, the equilibrium state inside gradually changes. When it accumulates to a certain extent, the battery often undergoes the following changes: cobalt acid lithium-ion batteries
1. Physical characteristics
According to the actual evidence of lithium-ion batteries stored for a certain period of time, the physical characteristics (appearance, size, weight, etc.) of the battery will undergo certain changes, especially the appearance characteristics. In situations where the temperature and humidity of the storage environment are poor, this trend is more pronounced.
In cases of high humidity, the weight gain of lithium-ion batteries after long-term storage is significantly higher than that of batteries placed at low humidity. If the steel shell of the battery is prone to rust under high humidity conditions, resulting in a slight increase in mass. Rust will not have an impact on the internal state of the battery, but it will directly affect the shipment of the product and may have a negative impact on its supporting electronic components.
2. Electrochemical characteristics
Long term storage of lithium-ion batteries may result in some side reactions, such as electrolyte decomposition, dissolution of active substances, and lithium deposition. After a long period of shelving, the equilibrium state inside the lithium-ion battery gradually changes. When it accumulates to a certain extent, the battery will undergo significant changes, which will be directly reflected in the electrochemical characteristics of the battery.
1) Capacity
The changes in the capacity of lithium-ion batteries that have been shelved for a long time are mainly reflected in two aspects: firstly, the decrease in battery capacity, mainly caused by self discharge; The second is the increase in irreversible capacity, which mainly depends on the irreversible consumption reactions between the internal chemical systems of the battery. The phenomenon of self discharge is inevitable in all lithium-ion batteries. The capacity loss caused by self discharge can be divided into two categories: reversible and irreversible: reversible refers to the portion of capacity that can be recovered when charging a lithium-ion battery, and irreversible loss refers to the unrecoverable capacity. It is necessary for battery manufacturers and battery users to reduce battery capacity loss after long-term storage.
2) Internal resistance
The internal resistance of a battery refers to the resistance between the positive and negative ends, which is the sum of the resistances of the current collector, electrode active material, separator, electrolyte, conductive handle, and terminal. For lithium-ion batteries, the smaller the internal resistance, the smaller the voltage occupied by the battery during discharge, and the more energy it can output. But for batteries stored for a long time, the resistance often increases with increasing storage time. Exceeding a certain resistance can cause the battery to exceed the benchmark internally, leading to scrapping or degradation. Therefore, it is necessary to pay attention to the changes in resistance during long-term storage of the battery
Read recommendations:
lithium batteries for solar panels Vendor
High Voltage 20kwh 30kwh 40kwh 100kwh Lithium Ion Battery 192V 380V For Solar Energy Storage System
Aerial drone high -power battery.lithium boat batteries maker
Is the lithium battery poisonous?solar battery storage system manufacturer
Last article:Analysis of the causes and effects of electrode cracking in lithium batteries.lithium trolling motor
Next article:Explore the advantages of lithium batteries for mobile phones.portable solar power generator
related suggestion
lithium golf cart batteries sales
2023-03-22lithium deep cycle marine battery price
2023-03-20lithium deep cycle marine battery company
2023-03-22lithium boat batteries wholesale
2023-03-22lifepo4 24v manufacture
2023-04-07lithium golf cart batteries wholesale
2023-03-22lithium battery 12v 100ah
2023-05-0812v 100ah battery price
2023-05-0812v 100ah deep cycle battery
2023-05-0812v 100ah lithium ion battery
2023-05-08lifepo4 12v 100ah
2023-05-0848 volt golf cart batteries
2023-05-08LiFePo4 Battery Pack 12V 350Ah
2022-09-19Lithium Replacing Lead-Acid LiFePo4 Battery Pack 12V 200Ah
2022-09-19Rechargeable Lithium Ion Battery Pack for Medical Device
2022-10-18100kwh Lithium Iron Phosphate Battery Rechargeable 380V For Solar Energy Storage
2023-02-14Marine Boat 12V 24V 36V Deep Cycle RV Lithium LiFePo4 Battery for Trolling Motor
2022-09-30How Much Do Solar Panels Cost in 2022? A Quick Guide
2022-09-08Performance characteristics of nickel hydrogen battery
2023-02-01The failure of lithium -phosphate iron batteries in the process of charging and discharge.lithium tr
2023-03-24How to Plan a Wonderful Camping Trip: 6 Simple Steps
2022-09-07The advantages of 18650 cylindrical lithium battery
2022-10-12Battery eliminates vulcanization.solar generator for camping
2023-07-13What can be done to prolong the service life of lithium battery of UAV?
2022-10-20Which of the colloid battery and lead -acid battery is better?
2023-02-24How to extend the battery life of electric vehicles.lithium golf cart batteries Production
2023-03-22Lithium manganate battery.solar battery generator
2023-07-14