Fágann cadhnraí nua nach mbíonn gluaisteáin leictreacha ina luí sa nead sa gheimhreadh a thuilleadh
Nochtfar feithiclí leictreacha ina bhfuil na-ceallraí aeráide go léir ag Cluichí Oilimpeacha an Gheimhridh i mBéising. Tá feidhmíocht agus fad saoil na ceallraí nua seo fíoraithe go hiomlán i dtástálacha cabhlaigh allamuigh a rinneadh i réigiúin fhuara ar feadh trí bliana.
"The problem of low temperature resistance of lithium-ion batteries has been solved." This battery technology comes from Wang Chaoyang, an academician of the National Academy of Inventors. He is a technical scientist for power lithium-ion batteries, energy storage and fuel-powered lithium batteries. On November 6, Wang Chaoyang pointed out at the Tencent WE Conference that energy storage technology is a key core technology to achieve the "dual carbon" goal and energy revolution, and has great strategic significance.
Acadóir Acadamh Náisiúnta na Aireagóirí, Wang Chaoyang, eolaí teicniúil de chadhnraí litiam cumhachta ian, stóráil fuinnimh agus cadhnraí litiam cumhachta breosla.
Grianghraf le caoinchead ó Chomhdháil Tencent WE
Tá cadhnraí i ngach áit, agus is minic a bhíonn teicneolaíochtaí ceallraí nua mar eochair d'ardú tionscail nua. Mar sin féin, i 200 bliain, níor athraigh struchtúr na ceallraí mórán. Tá sé comhdhéanta de thrí ábhar: ábhar leictreoid diúltach, ábhar leictreoid dhearfach, agus leictrilít a scarann an dá cheann. Déanann an struchtúr seo dhá chomhéadan go nádúrtha: tá ceann amháin ann idir an t-ábhar catóide agus an leictrilít, agus tá an ceann eile idir an t-ábhar anóid agus an leictrilít. Tá difríocht ionchasach idir an dá chomhéadan, rud a thugann voltas na ceallraí.
"Whether we are using the battery or not, the reaction interface in the battery has been working diligently and actively." Wang Chaoyang said, this is also the root cause of the battery's safety hazards and aging.
Tá an-eagla ar chadhnraí ian litiam roimh an bhfuacht, agus féadfaidh feithiclí leictreacha luí síos sa gheimhreadh: giorraítear an raon cúrsála agus is deacair é a luchtú.
Ní féidir leis an ábhar ceallraí féin ardghníomhaíocht teocht íseal agus cobhsaíocht ardteochta a shásamh. Ní mór d'innealtóirí córas bainistíochta teirmeach a chur leis an gceallraí chun sábháilteacht na ceallraí a chinntiú. Mar thoradh air sin, cuirfear meáchan ceallraí breise, toirte agus costas leis.
An bhfuil cineál ceallraí ann a fhéadfaidh an comhéadan imoibrithe a mhúchadh nuair nach bhfuil sé ag obair chun sábháilteacht a fheabhsú; nuair a bhíonn sé ag obair, an comhéadan a mhéadú agus an déine a mhéadú chun an chumhacht ard is gá a thabhairt?
Wang Chaoyang's team has been looking for and exploring such batteries with tunable interfaces.
Chruthaigh siad ceallraí aeráide uile, a foilsíodh san iris Nature. Gan inadhainteacht an leictrilít a mhéadú nó cobhsaíocht theirmeach an ábhair leictreoid a athrú, d'ionchlann siad scragall nicil 10-miocrón-tiubh taobh istigh den cheallraí mar eilimint téimh. Ag baint úsáide as an fuinneamh a thagann leis an gceallraí, chomh maith le lasc, is féidir gníomhaíocht na ceallraí a choigeartú de réir toil. Fiú má tá an ceallraí reoite i dtimpeallacht lúide 30 céim, ní thógann sé ach 30 soicind é féin a théamh go dtí os cionn náid agus oibriú de ghnáth.
Tá an teicneolaíocht seo glactha ag Cluichí Oilimpeacha an Gheimhridh Beijing 2022 agus tá sé anois ar cheann de na croítheicneolaíochtaí chun feithiclí leictreacha Oilimpeacha a thiomáint.
Add a piece of nickel foil, sounds like a pretty easy way. Wang Chaoyang told the Science and Technology Daily reporter that there is a tortuous exploration process behind it. The team has tried various methods and various materials: some have poor safety, some have low energy conversion efficiency, and some are very beautiful in the laboratory, but they still cannot be industrialized..." After 20 years For many years, my own feeling is that simplicity is beauty. Scientific discoveries with real practical value are ultimately the ultimate simplicity." Wang Chaoyang said with emotion, "Innovation requires persistence and perseverance. For so many years, our team has been tracking batteries and energy storage. The problem."
Based on the principle of thermal regulation, the team also invented a 10-minute fast-charging battery. Wang Chaoyang believes that the application and promotion of 10-minute fast-charging batteries is an important milestone in the development of electric vehicles—quick energy replenishment can free electric vehicle owners from mileage anxiety.
Wang Chaoyang's dream is to take a flying car to work before retiring. He pointed out that the biggest technical problem in flying cars is the battery. The requirements for the battery of a flying car are quite high, and it must quickly replenish the battery immediately after each landing. "Our experiments so far have demonstrated the feasibility and economy of a 10-minute fast-charging battery for flying cars."
In fact, fast battery charging and high energy density are both major scientific problems. Wang Chaoyang believes that the real solution should be peer-reviewed, published in a scientific journal, and verified by a third party to be repeatable, and then the market will provide a mass production method. "This is reliable." He emphasized that batteries and energy storage are one of the most important basic technologies in the new energy era and smart society, and will usher in huge innovation opportunities in the next decade.
