source:other news
release time:2022-11-01
Hits:0
Popular:

Since the launch of the new iPhone, there have been a number of incidents in which the battery has become bulging, causing the inside of the device to squeeze and causing the screen and body to crack. The battery safety issue is especially important to consumers after the Samsung Note7 exploded last year. As the benchmark of the mobile phone industry, this year's iPhone battery bulging incident is still brewing. If such incidents continue on a large scale in the future, it will have disastrous consequences for Apple. So under what circumstances will the cell phone battery bulge? Battery bulge is nothing more than due to the occurrence of chemical, electrochemical reaction gas inside the battery core and lead to the shell up, from the cause of consideration can be divided into external causes and internal causes, external causes including battery overcharge, overdischarge, short circuit, extrusion collision, storage environment, etc.; The internal factors include cell or battery design, manufacturing process, raw material selection, etc.
1. Incorrect charge and discharge leads to overcharge or overdischarge of the battery. If you continue to charge the battery after it reaches the saturation state, it is an overcharge. When the battery discharge voltage reaches the battery discharge termination voltage, it is called overdischarge. Overcharging or overreleasing will destroy the internal structure of the cell, leading to serious polarization of the electrode sheet, so that SEI film, electrolyte and other decomposition reaction and gas. Happened when lithium ion battery charger, excess lithium ions will be released from the positive active material, the positive crystal structure was destroyed, its oxygen, appear easily and lithium can deposit on the surface of carbon anode materials, lithium dendrite formation, the dendrite is easy to puncture the batteries diaphragm, lead to internal short circuit, appeared a lot of heat energy and fuel more internal chemical reaction, cause the battery to bulge, And even burst into flames.
2. Inappropriate storage or use environment. Lithium-ion batteries convert chemical energy into electricity through electrochemical reactions of internal compounds. Chemical reactions are affected by temperature, and the degree of side reactions and reaction products are dependent on temperature. When the battery is stored or used in a high temperature environment, the SEI film inside the battery and the electrolyte will decompose because of high temperature, and the decomposed material will also react with the positive and negative electrodes to produce gas. Especially when the battery is charged beyond the recommended temperature range, a large amount of lithium ions will be released from the active material of the battery. When the amount of lithium ions is increased, the stability of the crystal structure will be destroyed, and the safety of the battery will be reduced.
3. Mechanical abuse of batteries. Impact or extrusion is a typical mechanical way to trigger thermal runaway, which may cause damage to battery structure and protection panel function. Lead to battery internal or external short circuit, battery mechanical damage generally occurs in a very short time, battery structure by mechanical damage and lead to short circuit cell, and then cause thermal runaway. If the function of the battery protection board is damaged, the battery is more likely to cause overcharge and overdischarge without protection.
4. The battery factory has defects in the production process. Such as dust particles mixed inside the cell in the manufacturing process, burr is too large, uneven winding, uneven coating process problems, will cause the quality defects of lithium ion battery itself, buried hidden safety risks for lithium ion battery. Such quality problems can cause internal microshorting, which may occur slowly, and we will not be able to assess when the battery will become thermal runaway.
Read recommendations:
lithium ion golf cart batteries Vendor
lithium trolling motor battery
60V 48Ah LiFePO4 Battery for Two-Wheeler E-Mobility
Lithium secondary battery.solar powered generator for home
Nameplate capacity and rated voltage of lithium battery.solar generator for house
Last article:What causes UPS batteries to be damaged
Next article:Vanadium battery and lithium battery in the end which good?
related suggestion
solar power battery storage Factory
2023-04-07solar energy storage price
2023-03-20lithium marine batteries Production
2023-03-22lithium power station
2023-03-22lifepo4 solar battery Manufacturing
2023-04-07lithium boat batteries Processing
2023-03-22lithium golf cart batteries price
2023-05-08deep cycle trolling motor battery
2023-05-08best battery for home inverter
2023-05-08solar battery for house
2023-05-08solar powered electric generator
2023-05-08lithium batteries for solar panels
2023-05-08Lithium LiFePo4 Battery Pack 12V 50Ah Group 24 for RV Trolling Motor Solar Power
2025-02-2760V 48Ah LiFePO4 Battery for Two-Wheeler E-Mobility
2025-05-293.7V NCM 50Ah Semi Solid State Pouch Battery
2025-08-15Lithium Ion Battery 18650 Pack 11.1V 2200mAh
2025-05-1051.2V 26Ah LiFePO4 Battery for Electric Motorcycles Scooter Tricycle Rickshaw
2025-05-19Is it safe to use lithium batteries with high internal resistance and high energy?
2023-10-08Energy Solutions and Geopolitical Realities: 1 kW Batteries and the Ukraine Conflict
2025-03-20A Comprehensive Guide to Golf Cart Battery Chargers: Testing, Maintenance, and Choosing the Right Plug
2025-03-14Lithium ion battery
2022-12-05Balanced principle of battery pack
2023-02-15Fibrite battery.deep cycle marine battery company
2023-03-21What are the advantages of lithium ion battery?
2023-04-15How to distinguish the battery cells of A, B, and C lithium batteries.best portable solar generator
2023-08-02What are the methods of recycling lithium batteries?
2022-10-22five battery technologies.lithium ion golf cart batteries company
2023-05-06