Reasons for battery drums and explosions

ଲେଖକ: ଆଇଫ୍ଲୋପାୱାର - Pārnēsājamas spēkstacijas piegādātājs

First, lithium ion battery characteristics lithium is the minimum and most active metal in the chemical cycle table. Kichik o&39;lchamli, yuqori sig&39;imli zichlik, iste&39;molchi va muhandislar orasida mashhur. Biroq, kimyoviy xossalari juda jonli bo&39;lib, juda katta xavf tug&39;diradi.

When the lithium metal is exposed to air, it will produce a fierce oxidation reaction with oxygen and explod. Xavfsizlik va kuchlanishni yaxshilash uchun olimlar lityum atomlarini saqlash uchun grafit va lityum kobaltat kabi materiallarni ixtiro qildilar. Ushbu materiallarning molekulyar tuzilishi litiy atomlarini saqlash uchun ishlatilishi mumkin bo&39;lgan nanometrik darajadagi kichik saqlash panjarasini hosil qiladi.

In this way, even if the battery housing is broken, oxygen is entered, and the oxygen molecules will not be too large, and these small storage classes are not allowed to prevent the lithium atoms to avoid explosion. Lityum-ion batareyalarning ushbu printsipi odamlarni yuqori sig&39;imli zichlikka ega bo&39;lganda, ularning xavfsizligiga erishishga imkon beradi. Lityum ion batareyasi zaryadlanganda, musbat elektrodning lityum atomi litiy ionlariga oksidlangan elektronlarni yo&39;qotadi.

Lityum ionlari elektrolitik suyuqlik orqali salbiy elektrodga o&39;tadi, manfiy elektrodning rezervuariga kiradi va lityum atomini kamaytiradigan elektronni oladi. Bo&39;shatilganda, butun dastur tushib ketdi. Batareyaning ijobiy va salbiy elektrodini oldini olish uchun batareya qisqa tutashuvlarni oldini olish uchun ko&39;plab nozik teshiklari bo&39;lgan diafragma qog&39;ozini qo&39;shadi.

Yaxshi diafragma qog&39;ozi, shuningdek, batareya harorati juda yuqori bo&39;lsa, lityum ionlari xavfni oldini olish uchun kesib o&39;tolmasligi uchun nozik teshiklarni avtomatik ravishda o&39;chirib qo&39;yishi mumkin. The protective measure of the lithium battery core will begin to generate side effects after the voltage is higher than 4.2V.

Haddan tashqari zaryad bosimi yuqori va xavf ham yuqori. After the lithium battery voltage is higher than 4.2V, the remaining number of lithium atoms in the positive electrode material is less than half, and the storage degene will often be collapsed, so that the battery capacity has a permanent drop.

If the charging is continued, since the reservoir of the negative electrode is filled with a lithium atom, the subsequent lithium metal will accumulate in the surface of the negative electrode material. Ushbu litiy atomlari manfiy sirt yo&39;nalishidan litiy ionigacha bo&39;lgan tarvaqaylab kristallanish bo&39;ladi. Ushbu lityum metall kristallari diafragma qog&39;ozidan o&39;tib, ijobiy va salbiy qisqa tutashuvlarni hosil qiladi.

Sometimes the battery before the short circuit will explode first because materials such as the overcharge process, the electrolyte and other materials will lysis generating gas, so that the battery housing or pressure valve is broken, allowing oxygen to enter the lithium atomic response to the surface of the negative surface. In turn explodes. Therefore, when the lithium battery is charged, it must be set to set the voltage limit to simultaneously take into account the life, capacity, and security of the battery.

The most desirable charging voltage limit is 4.2V. Lityum batareya zaryadsizlanganda kuchlanish chegarasi bo&39;lishi kerak.

Some materials will be destroyed when the battery voltage is below 2.4V. Also because the battery will be self-discharge, the more long voltage is lower, so it is best not to put it until 2.

4V when discharged. The lithium battery is discharged from 3.0V to 2.

4V, and the released energy only accounts for about 3% of the battery capacity. Shuning uchun, 3,0V ideal tushirish kuchlanishi hisoblanadi.

Zaryadlash va tushirish vaqtida kuchlanish chegarasidan tashqari, oqim chegarasi ham zarur. Oqim juda katta bo&39;lsa, litiy ioni saqlash tarmog&39;iga kirmaydi, bu material yuzasida to&39;planadi. After these lithium ions obtain electron, the lithium atomic crystallization is produced on the surface of the material, which is the same as overcharges.

Yoriq bo&39;lsa, u portlab ketadi. Shuning uchun lityum-ion batareyalarni himoya qilish quyidagilarni o&39;z ichiga olishi kerak: zaryadlash kuchlanishining yuqori chegarasi, tushirish kuchlanish chegarasi va oqimning yuqori chegarasi. In the general lithium battery pack, in addition to the lithium battery core, there will be a protective plate, which is mainly to provide these three protection.

However, the three protection of the protector is obviously insufficient, and the global lithium battery explosion is still transmitted. Batareya tizimining xavfsizligini ta&39;minlash uchun siz batareyaning portlashini yanada ehtiyotkorlik bilan tahlil qilishingiz kerak. Second, the battery explosion cause: 1: The internal polarization is large! 2: Take the absorbent, reactor with the electrolyte.

3: The quality and performance of the electrolyte itself. 4: The amount of liquid is not until the process. 5: Laser welding in the assembly process is poor, leakage, leakage, gas leakage test.

6: dust, polar dust is first easily causing micro-short circuit, specific reasons unknown. 7: The positive and negative plate is thick, the process is thick, and the shell is difficult. 8: Nipple sealing problem, steel ball sealing performance is not good.

9: The housing material exists thickness, and the thickness of the housing deformation. Third, the explosion type analysis of the type of battery core explosion can be summarized as external short circuit, internal short circuit, and three kinds of charge. Bu erda tashqi tizim batareyaning tashqi tomoniga ishora qiladi, bu batareya paketidagi yomon izolyatsiya dizayni tufayli qisqa tutashuvlarni o&39;z ichiga oladi.

When a short circuit is outside the battery cell, the electronic component is not cut off, and the internal cell can generate high heat, resulting in a partial electrolyte steaming, and support the battery housing. When the internal temperature of the battery is high to 135 degrees Celsius, the quality of the diaphragm is closed, the electrochemical reaction is terminated or near termination, the current is plummeted, and the temperature is slowly decreased, and the explosion occurs. Shu bilan birga, nozik teshikni yopish tezligi juda yomon yoki nozik teshik diafragma qog&39;ozini yopmaydi, bu esa ko&39;tarilishni davom ettiradi, ko&39;proq elektrolitlar va batareya korpusini yakunlaydi va hatto batareya haroratini oshirish uchun batareya haroratini oshiradi Materiallar yonishi va portlashi.

The internal short circuit is mainly because the copper foil is pulling the membrane, or the branch crystal of the lithium atom is caused by the diaphragm. Ushbu nozik ignalar mikro-qisqa tutashuvlarga olib kelishi mumkin. Igna juda nozik bo&39;lgani uchun, ma&39;lum bir qarshilik qiymati mavjud, shuning uchun oqim shart emas.

Mis alyuminiy folga elim ishlab chiqarish jarayonidan kelib chiqadi. Bundan tashqari, nosozlik kichik bo&39;lgani uchun, ba&39;zida u yonib ketadi, shunda batareya normal holatga qaytadi. Shuning uchun, burrs tufayli portlash ehtimoli yuqori emas.

Shunday qilib, har bir hujayraning ichki qismidan ichki zaryadlangan qisqa batareyaga ega bo&39;lish mumkin. Biroq, portlash hodisasi sodir bo&39;ldi, ammo bu statistik jihatdan qo&39;llab-quvvatlandi. Therefore, the explosion caused by internal short circuits, mainly because of overcharge.

Chunki, bu igna shaklidagi lityum metall kristallanishi va u mikro-qisqa tutashuvdir. Shuning uchun batareyaning harorati asta-sekin o&39;sib boradi va nihoyat yuqori harorat gazni elektrolitga aylantiradi. Bu holat, materialni yoqish portlashi uchun juda yuqori bo&39;ladimi yoki tashqi qobiq birinchi bo&39;lib singan bo&39;ladimi, shuning uchun havo va lityum metallga sarmoya kiritiladi, bu portlashdir.

Biroq, haddan tashqari ichki qisqa tutashuvdan kelib chiqqan bu portlash zaryadlash vaqtida sodir bo&39;lishi shart emas. It is possible that the battery temperature has not been high enough to combust to the material, and the generated gas is not enough to break the battery case, the consumer will terminate the charging, with the mobile phone to go out. At this time, the heat generated by many micro-short circuits slowly increases the battery temperature.

After a period of time, explosion occurs. Iste&39;molchining umumiy ta&39;rifi telefonni ko&39;tarib, telefonning qizib ketganini, keyin esa portlaganini aniqlashdir. Ba&39;zi portlash turlari, biz portlashdan himoyalangan e&39;tiborni oldini olish, tashqi qisqa tutashuvni oldini olish va batareya xavfsizligini uchta jihatga oshirishimiz mumkin.

Ular orasida haddan tashqari chaltenning oldini olish va tashqi qisqa tutashuvni oldini olish elektron himoyaga tegishli bo&39;lib, batareya tizimining dizayni va batareya to&39;plami bilan katta aloqaga ega. Elektr xavfsizligini yaxshilashning asosiy yo&39;nalishi kimyoviy va mexanik himoya bo&39;lib, u batareya yadrosi ishlab chiqaruvchisi bilan katta aloqaga ega. Fourth, design specifications have hundreds of millions of mobile phones, and the failure rate of safety protection must be less than 100 million.

Chunki, elektron plataning ishdan chiqish darajasi odatda yuz milliondan ancha yuqori. Shuning uchun, batareya tizimi ishlab chiqilganda, ikkita xavfsizlik liniyasi bo&39;lishi kerak. Keng tarqalgan xato dizayni batareyani to&39;g&39;ridan-to&39;g&39;ri zaryadlovchi (Adaptor) bilan zaryad qilishdir.

Bu himoya himoyasini ortiqcha zaryad qiladi, batareya paketidagi himoya plitasini to&39;liq boshqaradi. Himoyachining ishlamay qolish darajasi yuqori bo&39;lmasa-da, xato darajasi past bo&39;lsa ham, global hali ham dunyoda portlash hodisasidir. If the battery system can provide two safety protection, the failure rate of each protection is one-third, and the failure rate can be reduced to 100 million.

Umumiy batareyani zaryadlash tizimi quyidagilardan iborat bo&39;lib, zaryadlovchi va batareya paketining ikkita qismini o&39;z ichiga oladi. Zaryadlash moslamasi ikkita qismdan iborat: adapter va zaryadlash boshqaruvchisi. Adapter AC quvvatini to&39;g&39;ridan-to&39;g&39;ri oqimga o&39;zgartiradi va zaryadlovchi boshqaruvchisi doimiy oqimning maksimal oqimi va maksimal kuchlanishini cheklaydi.

Batareya to&39;plamida himoya plitasining ikkita qismi va batareya yadrosi va maksimal oqimni cheklash uchun PTC mavjud. Text block: Adapter AC variable DC text block: Charging controller limited flow limited text square: charger text square: protective board over charge, overcharges and other protective text square: battery pack text square: limited flow film text square: The battery cell is used as an example. Overchard himoya tizimi 4 ga o&39;rnatiladi.

2V using the charger output voltage to achieve the first defense, so that the battery is not overcharged. Hazard. The second protection is the overter protection function on the protective board, generally set to 4.

3V. In this way, the protective board can usually be responsible for cutting the charging current, only when the charger voltage is extremely high,. Haddan tashqari oqimdan himoya qilish himoya taxtasi va oqim cheklovchi plyonka tomonidan javobgardir, bu ham ikkita himoya bo&39;lib, haddan tashqari oqim va tashqi qisqa tutashuvni oldini oladi.

Haddan tashqari zaryadsizlanish faqat elektronikadan foydalanish jarayonida sodir bo&39;ladi. Therefore, it is generally designed to provide the first to protection, and the protective plate on the battery pack provides a second protection. When the electronic product detects that the supply voltage is below 3.

0V, it should be automatically shut down. If the product is not designed when the product is designed, the protective board will turn off the discharge loop when the voltage is low to 2.4V.

In short, when the battery system is designed, it must provide two electronic protection for overcharge, over, and overcurrent. Ular orasida himoya taxtasi ikkinchi himoya hisoblanadi. Take the protective plate after charging, if the battery explodes, represents poor design.

Although the above method provides two protection, since the consumer will often buy a non-original charger to charge, and the charger industry, based on cost consideration, often take the charging controller to reduce costs. Natijada, bozorda juda ko&39;p sifatsiz zaryadlovchilar mavjud. Bu to&39;liq zaryad himoyasini yo&39;qotadi, birinchi yo&39;l ham eng muhim himoya chizig&39;idir.

Va ortiqcha zaryad - bu batareyaning portlashiga olib keladigan eng muhim omil. Shuning uchun, past zaryadlovchini batareya portlashining shiddatli deb atash mumkin. Of course, not all battery systems use a solution as shown above.

Ba&39;zi hollarda, batareya paketida zaryadlash boshqaruvchisining dizayni ham bo&39;ladi. Masalan: ko&39;plab noutbuklarning ko&39;plab akkumulyatorlari, zaryadlash boshqaruvchisi mavjud. Buning sababi shundaki, noutbuklar odatda kompyuterda zaryadlovchi kontrollerlarini bajaradi, faqat iste&39;molchilarga adapter beradi.

Shuning uchun, adapterni zaryad qilishda tashqi batareya paketining xavfsiz bo&39;lishini ta&39;minlash uchun noutbuk kompyuterining qo&39;shimcha batareya to&39;plamida zaryadlash boshqaruvchisi bo&39;lishi kerak. Bundan tashqari, mahsulot avtomobil sigareta zajigalkasi yordamida zaryadlanadi va zaryadlash boshqaruvchisi ba&39;zan batareya paketi ichida amalga oshiriladi. The final line If the protection of electronics failed, the last line of defense is to be provided by the battery.

Batareyaning xavfsizlik darajasi batareyaning tashqi qisqa tutashuvdan o&39;tishi va ortiqcha zaryadlanishiga asoslanishi mumkin. Because the battery explosion, if the internal lithium atom is stacked in the surface of the material, the explosion power will be larger. Bundan tashqari, haddan tashqari zaryaddan himoya qilish ko&39;pincha iste&39;molchilar tufayli faqat himoya chizig&39;iga ega, shuning uchun batareyaning tashqi qisqa tutashuvdan ko&39;ra ortiqcha zaryadga qarshi qobiliyati muhimroqdir.

Aluminum-shell batches and steel shell battery safety compare aluminum shells with high security advantages relative to the steel shell. .