source:other news
release time:2023-09-18
Hits:0
Popular:

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 Processing
3.7V NCM 50Ah Semi Solid State Pouch Battery
Main risks in transportation of lithium-ion batteries.solar generator for rv
The entire charging and discharging phase of a lithium battery
Last article:Analysis of the causes and effects of electrode cracking in lithium batteries.lithium trolling motor battery
Next article:Explore the advantages of lithium batteries for mobile phones.portable solar power generator
related suggestion
solar power battery storage Processing
2023-04-07solar powered battery pack wholesale
2023-04-07solar energy storage manufacture
2023-03-20home solar battery system wholesale
2023-04-0712v 100ah lithium ion battery
2023-03-20lifepo4 battery 12v direct sales
2023-04-07lifepo4 12v 100ah
2023-05-08lifepo4 solar battery
2023-05-08marine batteries for sale
2023-05-08solar battery for house
2023-05-08solar powered generator
2023-05-08best solar generator for home backup
2023-05-0818650 Na-ion Sodium-ion Battery 3.1V 1300mAh 1500mAh 3000 Cycles
2023-08-02Rechargeable Lithium Ion Battery Pack for Medical Device
2022-10-18Household Energy Storage System Battery Pack Integrated with Inverter 16S2P 51.2V 100Ah
2022-10-2051.2V 200Ah Wall Mounted Battery Pack for Home Energy Storage System
2023-06-19Customize Lipo Battery Cell Pack
2025-04-10Instruments and procedures for charging and discharging test of lithium-ion battery pack
2022-11-25Industrial Advantages and Applications of 21700 Battery Cells
2025-09-30Choosing the Right 12V Battery for Scooters: Performance and Reliability
2025-03-14Understanding HD2C 18650 and Other High-Performance Lithium-Ion Batteries for Industrial Use
2025-03-13Sodium-Ion 18650 Batteries: A Promising Alternative to Lithium for Industrial Applications
2025-06-25Electric vehicle power battery.marine battery for trolling motor
2023-08-113.6V lithium battery.deep cycle battery for sale
2023-05-27LiFePO4 lithium battery.solar energy storage batteries Vendor
2023-04-18Soft cymbal iron phosphate battery cell.lithium batteries for solar panels Vendor
2023-03-23New type sodium ion battery.dual purpose marine battery Production
2023-05-06