Reasons for battery drums and explosions

ଲେଖକ: ଆଇଫ୍ଲୋପାୱାର - Soláthraí Stáisiún Cumhachta Inaistrithe

First, lithium ion battery characteristics lithium is the minimum and most active metal in the chemical cycle table. Cabbir yar, cufnaanta awoodda sare, caan ku ah macaamiisha iyo injineerada. Si kastaba ha ahaatee, guryaha kiimikaad ayaa aad u firfircoon, oo keenaya khataro aad u sarreeya.

When the lithium metal is exposed to air, it will produce a fierce oxidation reaction with oxygen and explod. Si loo hagaajiyo badbaadada iyo tamarta, saynisyahannadu waxay ikhtiraaceen agabka sida graphite iyo lithium cobaltate si ay u kaydiyaan atamka lithium. Qaab dhismeedka molecular ee walxahan, waxay sameeyaan xargo kaydin yar oo heerka nanometric ah, kaas oo loo isticmaali karo in lagu kaydiyo atamka lithium.

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. Mabda&39;a baytariyada lithium-ion waxay dadka ka dhigayaa inay gaadhaan ammaankooda iyagoo helaya cufnaanta awoodda sare. Marka batteriga lithium ion la dallaco, atomka lithium-ka ee electrode-ka togan waxa uu lumin doonaa electrons, oksidhed ilaa lithium ions.

Lithium ions waxay aadaan electrode-ka taban iyagoo isticmaalaya dareeraha korantada, waxay galaan kaydka korantada taban, oo waxay helaan elektaroon, taas oo yaraynaysa atamka lithium. Markii la sii daayay, barnaamijka oo dhan wuu dhacay. Si looga hortago kororka togan iyo midka taban ee batteriga, batteriga wuxuu ku dari doonaa warqad diaphragm ah oo leh godad qurxoon oo badan si looga hortago wareegyada gaaban.

Waraaqda diaphragm ee wanaagsan waxay sidoo kale si otomaatig ah u damin kartaa godadka ganaaxa marka heerkulka batarigu aad u sarreeyo, si aanay ions lithium-ka u gudbi karin, si looga hortago khatarta. The protective measure of the lithium battery core will begin to generate side effects after the voltage is higher than 4.2V.

Cadaadiska xad-dhaafka ah ayaa sarreeya, khatartuna sidoo kale waa sarraysaa. 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. Atamyada lithium-yadan waxa ay la jaanqaadi doonaan crystallization laga bilaabo jihada dusha xun ilaa lithium ion. Kiristaalo bir lithium ah ayaa dhex mari doona warqad diaphragm si ay u sameeyaan wareegyo gaaban oo togan iyo taban.

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. Waa in uu jiraa xad koronto marka batteriga lithium laga saaro.

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. Sidaa darteed, 3.0V waa korantada goynta ugu habboon.

Waqtiga kharashka iyo bixinta, marka lagu daro xadka korantada, xadka hadda ayaa sidoo kale lagama maarmaan ah. Marka hadda uu aad u weyn yahay, lithium ion ma galo shabagga kaydinta, kaas oo isku geyn doona dusha alaabta. After these lithium ions obtain electron, the lithium atomic crystallization is produced on the surface of the material, which is the same as overcharges.

Xaaladda dildilaaca, way qarxi doontaa. Sidaa darteed, ilaalinta baytariyada lithium ion waa in lagu daraa: xadka sare ee korantada dallacaadda, xadka korantada ee soo saarista, iyo xadka sare ee hadda. 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. Si loo hubiyo badbaadada nidaamka batteriga, waa inaad si taxadar leh u baartaa qaraxa batteriga. 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. Nidaamka dibadda ee halkan waxaa loola jeedaa bannaanka batteriga, kaas oo ay ku jiraan wareegyada gaaban ee ay sababaan naqshadaynta liidata ee batteriga.

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. Si kastaba ha ahaatee, heerka xidhitaanka godka ganaaxa waa mid aad u liidata, ama daloolka ganaaxa ma xidho warqadda diaphragm, kaas oo sii wadi doona inuu kordho, electrolyte badan, iyo dhamaystirka hoyga batteriga, iyo xitaa kordhinta heerkulka batteriga si uu u sameeyo heerkulka batteriga Gubashada iyo qarxinta.

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. Irbadahan yaryar waxay sababi karaan wareegyada gaaban ee gaaban. Sababtoo ah cirbaddu aad ayey u fiican tahay, waxaa jira qiimo iska caabin ah, markaa hadda ma aha daruuri.

Xabagta aluminiumka naxaasta ah waxaa sababa habka wax soo saarka. Intaa waxaa dheer, maadaama cilad yar tahay, mararka qaarkood waa la gubi doonaa, si batteriga uu si caadi ah ugu soo noqdo. Sidaa darteed, suurtogalnimada qaraxa uu sababay burrs maaha mid sarreeya.

Sidan, waxaa suurtogal ah in batari gaaban gudaha laga soo dallaco gudaha unug kasta. Si kastaba ha ahaatee, dhacdada qaraxa ayaa dhacday, laakiin waa la taageeray. Therefore, the explosion caused by internal short circuits, mainly because of overcharge.

Sababtoo ah, waa bir lithium bir ah oo irbad u qaabaysan, waana wareeg yar oo gaaban. Sidaa darteed, heerkulka batteriga ayaa si tartiib tartiib ah u kordhi doona, iyo ugu dambeyntii heerkulka sare wuxuu noqon doonaa gaaska korantada. Xaaladdan oo kale, haddii ay tahay mid aad u sarreeya si ay u sameeyaan walxaha gubanaya, ama qolof sare ayaa marka hore jabay, si ay hawadu gelisay iyo birta lithium, waa qaraxa.

Si kastaba ha ahaatee, qaraxan ka dhashay wareegga gaaban ee xad-dhaafka ah ee gudaha ah qasab maaha inuu dhaco wakhtiga dallad. 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. Sharaxaadda guud ee macaamilka ayaa ah in uu talefanka qabto oo uu ogaado in talefanku kulul yahay, ka dibna uu qarxay. Qaar ka mid ah noocyada qaraxyada, waxaan ku dhejin karnaa diiradda-iska-caabbinta ka-hortagga, ka-hortagga wareegga gaaban ee dibadda, iyo hagaajinta badbaadada batteriga saddex dhinac.

Waxaa ka mid ah, ka-hortagga xad-dhaafka ah iyo ka-hortagga wareegga gaaban ee dibadda waxaa iska leh ilaalinta elektaroonigga ah, waxayna xiriir weyn la leeyihiin naqshadeynta nidaamka batteriga iyo xirmada batteriga. Diirada hagaajinta badbaadada korantada waa ilaalinta kiimikada iyo farsamada, taas oo xiriir weyn la leh soo saaraha xudunta u ah batteriga. Fourth, design specifications have hundreds of millions of mobile phones, and the failure rate of safety protection must be less than 100 million.

Sababtoo ah, heerka fashilka ee guddiga wareegga ayaa guud ahaan aad uga sarreeya boqol milyan. Sidaa darteed, marka nidaamka batteriga la nashqadeeyo, waa inuu jiraa laba khad oo ammaan ah. Naqshadaynta qaladka caadiga ah waa in si toos ah bateriga loogu dallaco charger (Adaptor).

Tani waxay si xad dhaaf ah u dallaci doontaa ilaalinta ilaalinta, iyadoo si buuxda u xamili doonta saxanka difaaca ee batteriga. In kasta oo heerka guuldarradu aanu sarreyn, xataa haddii heerka cilladdu hoos u dhacdo, dunidu weli waa shil qarax oo adduunka ka dhaca. 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.

Habka dallacaadda baytarigu waa sida soo socota, oo ay ku jiraan laba qaybood oo xeedho iyo baakidh batari ah. Dabeyuhu waxa kale oo ku jira laba qaybood: adabtarada iyo kontaroolaha dallacaadda. Adapter-ku waxa uu awooda AC u rogaa hadda toos ah, koontaroolaha dallacadu waxa uu xaddidaa tamarta ugu badan ee hadda iyo ugu badan ee DC.

Baakadu waxay ka kooban tahay laba qaybood oo saxanka difaaca ah iyo xudunta batteriga, iyo PTC si loo xaddido wakhtiga ugu badan. 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. Nidaamka ilaalinta lacagta xad dhaafka ah ayaa loo dejiyay 4.

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,. Ilaalinta xad-dhaafka ah ayaa mas&39;uul ka ah guddiga ilaalinta iyo filimka xaddidan ee hadda jira, kaas oo sidoo kale ah laba ilaalin, ka hortagga wareegga gaaban ee qulqulka iyo dibadda.

Maadaama dareeraha xad-dhaafka ahi uu ku dhici doono oo keliya habka elektarooniga loo isticmaalo. 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. Waxaa ka mid ah, guddiga ilaalinta waa ilaalinta labaad. 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. Natiijo ahaan, waxaa jira wax badan oo xajiyeyaasha hooseeya ee suuqa. Tani waxay ka dhigaysaa ilaalinta buuxda ee lumin habka ugu horreeya sidoo kale waa khadka ugu muhiimsan ee difaaca.

Kharashka xad dhaafka ahi waa qodobka ugu muhiimsan ee uu batarigu qarxo. Sidaa darteed, dabaysha hoose waxaa lagu magacaabi karaa ba&39;an ee qaraxa batteriga. Of course, not all battery systems use a solution as shown above.

Xaaladaha qaarkood, waxaa sidoo kale jiri doona naqshadeynta kontoroolka dallacaadda ee xirmada batteriga. Tusaale ahaan: ulo batari badan oo buugaag xusuus-qor ah oo badan, waxaa jira kontaroolaha dallacaadda. Tani waa sababta oo ah buugaagta xusuus qorku guud ahaan waxay ku dallacaan kontaroolayaasha kombiyuutarka, kaliya waxay siiyaan macaamiisha adabtarada.

Sidaa darteed, baakidhka dheeriga ah ee kumbiyuutarka buug-yaraha waa inuu lahaadaa kontaroolaha dallacaadda si loo hubiyo in baakadda dibadda ahi ay badbaado tahay marka la dallacanayo adabtarada. Intaa waxaa dheer, badeecada waxaa lagu dallaci karaa iyadoo la isticmaalayo shidalka sigaarka ee baabuurka, iyo kontoroolka dallaca ayaa mararka qaarkood lagu sameeyaa baakadka batteriga. The final line If the protection of electronics failed, the last line of defense is to be provided by the battery.

Heerka badbaadada batteriga wuxuu ku salaysnaan karaa bal in batterigu dhaafi karo wareegga gaaban ee dibadda iyo kharash dheeraad ah. Because the battery explosion, if the internal lithium atom is stacked in the surface of the material, the explosion power will be larger. Waxaa intaa dheer, ilaalinta xad-dhaafka ah inta badan waxay leedahay kaliya khadka difaaca sababtoo ah macaamiisha, markaa awoodda batteriga ka-hortagga-dhaafka ah ee ka-hortagga wareegga gaaban ayaa aad muhiim u ah.

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