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:
solar power battery storage Production
12V Rechargeable Lithium Ion 18650 Battery Pack 2000mAh
What battery is used at low temperature?solar powered battery pack Manufacturing
Last article:What causes UPS batteries to be damaged
Next article:Vanadium battery and lithium battery in the end which good?
related suggestion
solar energy storage batteries manufacturer
2023-03-20solar battery storage system cost
2023-03-20lifepo4 12v
2023-04-07portable power station solar
2023-03-20lithium trolling motor battery company
2023-04-07solar battery for house direct sales
2023-04-07deep cycle marine battery
2023-05-08lithium deep cycle marine battery
2023-05-08best batteries for off grid solar
2023-05-08best portable power station
2023-05-08best solar powered generator
2023-05-08best power station
2023-05-0812V 100Ah Semi-Solid State Battery Pack
2025-03-28HB-N100 100W Small Power Station 130Wh
2022-09-0948V 51.2V 105Ah Golf Cart LiFePo4 Battery 100Ah 6000 Cycles IP67 Waterproof with RS485 CAN
2025-02-27Household Energy Storage System Battery Pack Integrated with Inverter 16S2P 51.2V 100Ah
2022-10-20Lithium Ion Battery 18650 Pack 11.1V 12V 2000mAh 3000mAh
2023-02-09Understanding the Advantages and Disadvantages of Sodium-Ion Batteries for Business Applications
2025-03-14Lithium battery tram.solar power battery storage
2023-07-03Lithium ion battery
2022-12-05The Future of Portable Power: Lithium Polymer Battery Manufacturing
2025-03-22The advantages of 18650 cylindrical lithium battery
2022-10-12New energy vehicle battery pack
2023-07-27Consistency issues with lithium batteries.best solar powered generator
2023-10-09The available capacity of the battery.lithium power station manufacture
2023-03-31What is the difference between powered lithium batteries and ordinary lithium batteries
2022-10-15Five methods to select high -quality high Lithium batteries.best portable solar generator
2023-06-17