Reasons for battery drums and explosions

著者：Iflowpower – Portable Power Station ပေးသွင်းသူ

First, lithium ion battery characteristics lithium is the minimum and most active metal in the chemical cycle table. Boholo bo bonyenyane, boima bo phahameng ba matla, bo tumme ke bareki le baenjiniere. Leha ho le joalo, lintho tsa lik&39;hemik&39;hale li matla haholo, li tlisa likotsi tse phahameng haholo.

When the lithium metal is exposed to air, it will produce a fierce oxidation reaction with oxygen and explod. E le ho ntlafatsa polokeho le motlakase, bo-rasaense ba ile ba qapa lisebelisoa tse kang graphite le lithium cobaltate ho boloka liathomo tsa lithium. Sebopeho sa limolek&39;hule tsa lisebelisoa tsena, se etsa lesela le lenyenyane la polokelo la boemo ba nanometric, le ka sebelisoang ho boloka liathomo tsa 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. Molao-motheo ona oa libeteri tsa lithium-ion o etsa hore batho ba finyelle polokeho ea bona ha ba ntse ba fumana matla a eona a phahameng. Ha betri ea lithium ion e qosoa, athomo ea lithium ea electrode e ntle e tla lahleheloa ke li-electrone, e oxidized ho li-ion tsa lithium.

Li-ion tsa lithium li ea ho electrode e mpe ka mokelikeli oa electrolytic, kenya polokelong ea eleketrode e mpe, &39;me u fumane elektrone, e fokotsa athomo ea lithium. Ha e lokolloa, lenaneo lohle le ile la oa. E le ho thibela electrode e ntle le e mpe ea betri, betri e tla eketsa pampiri ea diaphragm e nang le masoba a mangata ho thibela li-circuits tse khutšoanyane.

Pampiri e ntle ea diaphragm e ka boela ea tima likoti tse ntle ka bo eona ha mocheso oa betri o phahame haholo, e le hore li-ion tsa lithium li se ke tsa tšela, ho thibela kotsi. The protective measure of the lithium battery core will begin to generate side effects after the voltage is higher than 4.2V.

Khatello e feteletseng e phahame, &39;me kotsi e boetse e phahame. 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. Liathomo tsena tsa lithium li tla ba branched crystallization ho tloha ka lehlakoreng la sebaka se fosahetseng ho ea ho lithium ion. Likristale tsena tsa tšepe tsa lithium li tla feta pampiring ea diaphragm ho etsa lipotoloho tse khutšoane tse ntle le tse mpe.

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. Ho tlameha ho be le moeli oa voltage ha betri ea lithium e tsoa.

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. Ka hona, 3.0V ke matla a loketseng a ho lahla motlakase.

Nakong ea tefiso le ho tsoa, ​​ho phaella moeling oa motlakase, moeli oa hona joale o boetse oa hlokahala. Ha hona joale e le khōlō haholo, lithium ion ha e kene ka marang-rang a polokelo, e tla bokellana holim&39;a thepa. After these lithium ions obtain electron, the lithium atomic crystallization is produced on the surface of the material, which is the same as overcharges.

Tabeng ea ho petsoha, e tla phatloha. Ka hona, ts&39;ireletso ea libeteri tsa lithium ion e lokela ho kenyelletsoa: moeli o ka holimo oa motlakase oa ho tjhaja, moeli oa ho ntša motlakase, le moeli o ka holimo oa hona joale. 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. Ho netefatsa polokeho ea sistimi ea betri, o tlameha ho etsa tlhahlobo e hlokolosi haholoanyane ea ho phatloha ha betri. 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. Sistimi ea kantle mona e bua ka bokantle ba betri, e kenyelletsang li-circuits tse khuts&39;oane tse bakoang ke moralo o mobe oa ho kenella ka har&39;a betri pakete.

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. Leha ho le joalo, sekhahla se setle sa ho koala sekoti se futsanehile haholo, kapa sekoti se setle ha se koale pampiri ea diaphragm, e tla tsoela pele ho phahama, ho feta electrolyte, &39;me ho phethela matlo a betri, esita le ho eketsa mocheso oa betri ho etsa mocheso oa betri Material tukang le ho phatloha.

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. Linale tsena tse ntle li ka baka li-circuits tse khuts&39;oane tse nyane. Hobane nale e ntle haholo, ho na le boleng bo itseng ba ho hanyetsa, kahoo hona joale ha se hakaalo.

Sekhomaretsi sa koporo ea aluminium foil se bakoa ke ts&39;ebetso ea tlhahiso. Ho feta moo, kaha glitch e nyenyane, ka linako tse ling e tla chesoa, e le hore betri e khutlele ho tloaelehileng. Ka hona, monyetla oa ho phatloha ho bakoang ke li-burrs ha o phahame.

Ka tsela ena, hoa khoneha ho ba le betri e khutšoanyane ka hare ho qosoa ka hare ho e &39;ngoe le e&39; ngoe ea lisele. Leha ho le joalo, ketsahalo ea ho phatloha e etsahetse, empa e tšehelitsoe ka lipalo. Therefore, the explosion caused by internal short circuits, mainly because of overcharge.

Hobane, ke lithium metal crystallization e bōpehileng joaloka nale, &39;me ke potoloho e khutšoanyane e nyenyane. Ka hona, mocheso oa betri o tla eketseha butle-butle, &39;me qetellong mocheso o phahameng o tla ba khase ea electrolyte. Boemo bona, ebang bo phahame haholo ho etsa hore thepa e tukang e phatlohe, kapa khetla e ka ntle e qala ho robeha, e le hore moea o kenngoe chelete le tšepe ea lithium, ke ho phatloha.

Leha ho le joalo, ho phatloha hona ho bakoang ke potoloho e khutšoanyane e feteletseng ea ka hare ha ho hlile ho etsahala nakong ea ho tjhaja. 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. Tlhaloso e tloaelehileng ea moreki ke ho nka fono le ho fumana hore fono e chesa, ebe e phatloha. Mefuta e meng ea ho phatloha, re ka beha maikutlo a thibelang ho phatloha, thibelo ea potoloho e khuts&39;oane ea kantle, le ho ntlafatsa polokeho ea betri likarolo tse tharo.

Har&39;a bona, thibelo ea overchalten le thibelo ea potoloho e khuts&39;oane ea kantle ke ea ts&39;ireletso ea elektroniki, hape e na le kamano e kholo le moralo oa sistimi ea betri le pakete ea betri. Sepheo sa ntlafatso ea tšireletso ea motlakase ke tšireletso ea lik&39;hemik&39;hale le mechine, e nang le kamano e kholo le moetsi oa motheo oa betri. Fourth, design specifications have hundreds of millions of mobile phones, and the failure rate of safety protection must be less than 100 million.

Hobane, sekhahla sa ho hloleha ha boto ea potoloho hangata se phahame haholo ho feta limilione tse lekholo. Ka hona, ha sistimi ea betri e entsoe, ho tlameha ho ba le mela e &39;meli ea ts&39;ireletso. Moralo oa liphoso tse tloaelehileng ke ho tjhaja betri ka kotloloho ka tjhaja (Aadapter).

Sena se tla lefisa ts&39;ireletso ea ts&39;ireletso, ho sebetsana ka botlalo le poleiti e sireletsang paketeng ea betri. Leha sekhahla sa ho hloleha ha mosireletsi se se holimo, leha sekhahla sa phoso se le tlase, lefats&39;e e ntse e le kotsi ea ho phatloha lefatšeng. 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.

Sistimi e tloaelehileng ea ho tjhaja betri ke e latelang, ho kenyeletsoa likarolo tse peli tsa tjhaja le pakete ea betri. Chaja e boetse e kenyelletsa likarolo tse peli: adaptara le molaoli oa ho tjhaja. Adapter e fetola matla a AC ho tsamaisa hona joale, &39;me molaoli oa ho tjhaja o lekanyetsa matla a phahameng a hona joale le a mangata a DC.

Pakete ea betri e na le likarolo tse peli tsa poleiti e sireletsang le mokokotlo oa betri, le PTC ho fokotsa boholo ba hajoale. 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. Sistimi ea ts&39;ireletso ea overchard e behiloe ho 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,. Tšireletso ea overcurrent e ikarabella ka boto e sireletsang le filimi ea hona joale e fokotsang, e leng tšireletso e &39;meli, e thibelang potoloho e khutšoanyane ea overcurrent le ea ka ntle.

Kaha ho tsoa ho feta tekano ho tla etsahala feela ts&39;ebetsong ea lisebelisoa tsa elektronike. 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. Har&39;a bona, boto ea tšireletso ke tšireletso ea bobeli. 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. Ka lebaka leo, ho na le li-charger tse ngata tse tlaase &39;marakeng. Sena se etsa hore ts&39;ireletso e felletseng e lahleheloe ke tsela ea pele hape ke mohala oa bohlokoa ka ho fetisisa oa ts&39;ireletso.

&39;Me ho feta tefiso ke ntlha ea bohlokoa ka ho fetisisa eo ho phatloha ha betri ho bakoang ho eona. Ka hona, tjhaja e tlase e ka bitsoa ho phatloha ho matla ha betri. Of course, not all battery systems use a solution as shown above.

Maemong a mang, ho tla ba le moralo oa taolo ea ho tjhaja ka har&39;a pakete ea betri. Mohlala: lithupa tse ngata tsa betri tsa libukana tse ngata, ho na le selaoli sa ho tjhaja. Lebaka ke hobane libuka tsa ho ngolla hangata li etsa lilaoli tsa ho tjhaja komporong, li fa bareki feela adaptara.

Ka hona, pakete e eketsehileng ea betri ea komporo ea bukana e tlameha ho ba le selaoli sa ho tjhaja ho netefatsa hore pakete ea betri e kantle e bolokehile ha o tjhaja adaptara. Ho phaella moo, sehlahisoa se lefisoa ho sebelisoa mochine oa lisakerete oa koloi, &39;me molaoli oa ho tjhaja ka linako tse ling o etsoa ka har&39;a pakete ea betri. The final line If the protection of electronics failed, the last line of defense is to be provided by the battery.

Boemo ba polokeho ea betri bo ka ipapisa le hore na betri e ka fetisa seketsoana sa kantle le ho tjhaja ho feta tekano. Because the battery explosion, if the internal lithium atom is stacked in the surface of the material, the explosion power will be larger. Ho feta moo, ts&39;ireletso e fetang tefiso hangata e na le mohala oa ts&39;ireletso feela ka lebaka la bareki, kahoo bokhoni ba betri ea anti-overcharge ho feta anti-external short circuit bo bohlokoa haholo.

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