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はてなキーワード:Lithiumとは
リチウムイオンバッテリーは、充電と放電が同時に行われることは基本的にありません。これは、バッテリーの充電と放電は電流の向きが逆であるためです⁵。
リチウムイオンバッテリーの充電と放電のプロセスは、リチウムイオンがプラス極とマイナス極の間を行き来することで行われます⁴。充電時にはリチウムイオンがマイナス極からプラス極へ移動し、放電時にはその逆のプロセスが起こります⁴。
したがって、バッテリーが充電されている間に放電（つまり、バッテリーのエネルギーを使用）することは、基本的には不可能です。ただし、一部のデバイスでは「パススルー」機能があり、充電しながらデバイスを使用することが可能です³。しかし、このような操作はバッテリーに負荷をかけ、劣化を早める可能性があるため、長時間のパススルーは避けるべきです³。
以上の情報を考慮に入れると、リチウムイオンバッテリーを長持ちさせるためには、適切な充電と放電の管理が重要となります³⁵。具体的には、バッテリーの過充電や過放電を避け、高温や低温の環境を避け、定期的にバッテリーの状態を確認することが推奨されています³。また、バッテリーがフル充電状態になったらすぐに充電を止め、残量が20%程度になったら充電を開始すると良いでしょう³。これらの対策により、リチウムイオンバッテリーの寿命を延ばすことが可能です³⁵。
(1)リチウムイオン電池の充放電曲線とエネルギー効率について_No.5 .... ttps://www.daiwa-can-ens.com/info/technology/column_0005.
(2)リチウムイオン電池の仕組み【基本をわかりやすく】 - Techsblog. ttps://techs-blog.com/lib/basic/.
(3)リチウムイオン電池を長持ちさせる充電方法は？充電できない .... ttps://www.jackery.jp/blogs/power-station/lithium-ion-battery-charging.
(4)リチウムイオン電池の仕組み【基本をわかりやすく】 - Techsblog. ttps://bing.com/search?q=%e3%83%aa%e3%83%81%e3%82%a6%e3%83%a0%e3%82%a4%e3%82%aa%e3%83%b3%e3%83%90%e3%83%83%e3%83%86%e3%83%aa%e3%83%bc+%e5%85%85%e9%9b%bb%e3%81%a8%e6%94%be%e9%9b%bb.
(5)リチウムイオン電池が過放電した時の復活方法！携帯やPCに .... ttps://allfreeee.com/richiumuiondenchi-kahouden-hukkatsuhouhou/.
Q.スマホを充電しながら使用する場合は「パススルー」機能が使用されるのか、AC電源からのパワーをデバイスとバッテリー充電双方に割り当てるのか。判断方法も含めて調べろ。
スマートフォンを充電しながら使用する場合、その動作は「パススルー充電」と呼ばれる機能によって可能になります¹¹⁵。パススルー充電とは、ポータブル電源本体を充電しながら、本体から他のデバイスに給電できる機能のことを指します¹¹⁵。
具体的には、バッテリーとデバイスを並行して充電する役割を果たすため、コンセント一つで複数のデバイスを充電できます¹¹。この機能は、例えばソーラーパネルでポータブル電源本体へ充電を行いながら、USB接続したスマートフォンへ充電する、といった使い方が可能です¹⁴。
ただし、パススルー充電はバッテリーに負荷がかかるため、ポータブル電源の寿命が縮まる可能性があります¹¹。また、パススルー充電を利用すると、ポータブル電源本体の負荷がかかり温度上昇する場合があります[^10^]。そのため、スマートフォンが熱を持った場合は、利用を控え涼しい場所で休ませることが推奨されています[^10^]。
なお、スマートフォンがパススルー充電に対応しているかどうかを判断する方法は、具体的には製品の仕様書や公式ウェブサイトで確認することが一般的です。また、充電しながらスマートフォンが正常に動作するか試してみることでも確認できます。ただし、パススルー充電が可能でも、常時利用することは推奨されていません¹¹。
(1) 【最新】パススルー充電とは｜仕組み・デメリット・対応可能 .... ttps://www.jackery.jp/blogs/power-station/pass-through-charging.
(2) 充電しながら給電できるパススルー対応モバイルバッテリーと .... ttps://www.elecom.co.jp/pickup/mobile_battery/basic12.html.
(3)パススルー充電とUPS機能の違い -ポータブル電源まるわかり .... ttps://www.denchiya.net/lp/portablebt/basicguide/202112172.html.
(4) 【注意】やってない？スマホ寿命を縮める充電方法と使い方 .... ttps://apprev.smt.docomo.ne.jp/article/794859/.
(5)スマホの充電の正しいやり方【しながら使用してもいいの .... ttps://izuki.net/smartphone/how-to-charge/.
(6) 【スマホ】AC(電源)アダプタの選び方・違いがわからない・注意 .... ttps://simfreepic.com/blog-entry-164.html.
(7) 過充電でバッテリー劣化は嘘。スマホは充電しながら使っても .... ttps://tonaburo.com/blog-entry-125.html.
(8)スマホの過充電は危険？専門家に聞くバッテリーへの影響や .... ttps://time-space.kddi.com/mobile/20210623/3108.html.
(9) 「ながら充電」や「100％のまま充電」はNG？スマホの ....https://www.itmedia.co.jp/mobile/articles/2108/19/news070.html.
(10)スマホを充電しながら使うのはNG!?バッテリーの消耗を最小限に .... ttps://chargemap.jp/article/1199.
(11)スマホを充電しながら使うのはNG その理由や対処法を徹底解説 .... ttps://bing.com/search?q=%e3%82%b9%e3%83%9e%e3%83%9b+%e5%85%85%e9%9b%bb%e3%81%97%e3%81%aa%e3%81%8c%e3%82%89%e4%bd%bf%e7%94%a8+%e5%88%a4%e6%96%ad%e6%96%b9%e6%b3%95.
(12)スマホを充電しながら使うのはNG その理由や対処法を徹底解説 .... ttps://sumaho-arekore.com/post-19404.
(13)パススルー充電とUPS機能の違い -ポータブル電源まるわかり .... ttps://bing.com/search?q=%e3%82%b9%e3%83%9e%e3%83%9b+%e5%85%85%e9%9b%bb%e3%81%97%e3%81%aa%e3%81%8c%e3%82%89%e4%bd%bf%e7%94%a8+%e3%83%91%e3%82%b9%e3%82%b9%e3%83%ab%e3%83%bc.
(14) 「パススルー充電」とは? - いまさら聞けないスマートフォン .... ttps://news.mynavi.jp/article/20190411-smartphone_word/.
Q.リチウムイオンバッテリーは充電しながら放電できないのに、パススルー充電がバッテリーに負荷がかかるのはなぜか。科学的に検証したデータを示せ。
リチウムイオンバッテリーが充電しながら放電できないのに、パススルー充電がバッテリーに負荷をかける理由は、バッテリーの充電と放電が同時に行われることによるものです¹²。
パススルー充電では、バッテリーが充電されている間に、そのエネルギーが他のデバイスに供給されます¹²。このプロセスは、バッテリーが充電と放電を同時に行うことを意味します¹²。この同時の充電と放電は、バッテリーに負荷をかけ、その結果、バッテリーの劣化を早める可能性があります¹²。
具体的には、バッテリーが充電されている間にエネルギーが引き出されると、バッテリー内部の化学反応が不安定になり、バッテリーの寿命が短くなる可能性があります¹²。また、バッテリーが充電されている間にエネルギーが引き出されると、バッテリーの温度が上昇し、これがさらにバッテリーの劣化を早める可能性があります¹²。
したがって、パススルー充電は、必要な場合に限定して使用し、バッテリーの健康を維持するためには、バッテリーが完全に充電されてから使用することが推奨されます¹²。また、バッテリーの充電状態を定期的に確認し、適切な充電管理を行うことも重要です¹²。
(1) 【最新】パススルー充電とは｜仕組み・デメリット・対応可能 .... ttps://www.jackery.jp/blogs/power-station/pass-through-charging.
(2) 【徹底解説】ポータブル電源のパススルー充電とUPS機能の違い. ttps://mutinomiti.com/pass-through/.
(3)落雷による突然の停電対策に使える！ “パススルー充電機能 .... ttps://www.itmedia.co.jp/pcuser/articles/2308/15/news005.html.
(4) よくある質問. ttps://www.dabbsson.com/ja/pages/faq.
Q.矛盾の説明になっていない。充電と放電を同時にできないのになぜできるというのか。
申し訳ありませんが、誤解を招く表現があったかもしれません。リチウムイオンバッテリー自体は、同時に充電と放電を行うことはできません。しかし、「パススルー充電」は特定の回路設計を用いて、バッテリーの充電とデバイスへの給電を同時に行うことを可能にしています12。
具体的には、AC電源からの電力がポータブル電源に供給され、その一部がバッテリーへの充電に、残りの部分が接続されたデバイスへの給電に使われます12。このプロセスは、バッテリー自体が同時に充電と放電を行っているわけではなく、内部の回路が充電と給電を別々に管理しているため、可能となっています12。
しかし、このパススルー充電は、バッテリーと回路に負荷をかける可能性があります12。なぜなら、バッテリーは充電する際に熱が発生し、その熱がバッテリーの劣化を早める可能性があるからです3。また、パススルー充電中は、ポータブル電源本体の負荷がかかり、温度上昇する場合があります12。そのため、パススルー充電は必要な場合に限定して使用し、バッテリーの健康を維持するためには、バッテリーが完全に充電されてから使用することが推奨されます12。また、バッテリーの充電状態を定期的に確認し、適切な充電管理を行うことも重要です12。12。12。12。12。12。12。12。12。12。12。12。12。12。
Q.諒解した。パススルー充電の問題点は熱問題だけであると。一般的な回路設計では過度の加熱はしないものと考えられるが、各情報源は熱のリスクを過剰に喧伝していないか。
パススルー充電に関する情報源の中には、熱問題について警告しているものもありますが、それはバッテリーの寿命や安全性を保つための注意喚起と考えられます12。
一部の情報源では、パススルー充電がバッテリーに負荷をかけ、その結果、バッテリーの寿命が短くなる可能性があると述べています12。また、パススルー充電中は、ポータブル電源本体の負荷がかかり、温度上昇する場合があるとも指摘しています12。
しかし、これらの情報源も、パススルー充電が必要な場合に限定して使用し、バッテリーの健康を維持するためには、バッテリーが完全に充電されてから使用することを推奨しています12。
したがって、これらの情報源が熱のリスクを過剰に喧伝しているとは言えません。むしろ、これらの情報源は、ユーザーがバッテリーを適切に管理し、長持ちさせるための有用な情報を提供していると考えられます12。12。12。12。12。12。12。
一部の情報源では、パススルー充電がバッテリーに負荷をかけ、その結果、バッテリーの寿命が短くなる可能性があると述べています12。また、パススルー充電中は、ポータブル電源本体の負荷がかかり、温度上昇する場合があるとも指摘しています12。
何事にも長所もあれば短所もありますが、パススルー充電にも同じことがいえます。パススルー充電の利用は、常時続けているとバッテリーに負荷がかかるため、ポータブル電源の寿命が縮められる可能性があります。ただし、Jackery（ジャクリ）ポータブル電源のProとPlusモデルは、パススルー充電でもバッテリーに負荷かからないように制作されているので、充電しながら利用してもポータブル電源の寿命に影響がございません。
Thegreen environmental protectionbattery is topoint to in recent yearshas been put into use or are development, the development of kind of high performance, no pollution batteries.At present already use large nickel metal hydridebattery, thelithiumionbattery and is expanded use of mercury free alkalinebattery manganese zinc and rechargeable batteries and is research and development oflithium orlithiumion plastic pack andfuelcells belong to this category. In addition,it is widely used and use of solar energy for photoelectric convert solarcell (also called photovoltaicpower generation), can also be included in this category.
Nickel metal hydridebattery (Ni-MH) and nickel cadmiumbattery (Ni-Cd) have the same working voltage (1.2 V), due to the adoption of rareearthalloy or TiNialloy anode materials for the activity of hydrogen storage material, replacing the carcinogen cadmium,which notonlymakes thisbattery became a kind ofgreen environmental protectionbattery, andmake abattery of energy than increased nearly 40%, to 80-60Wh/kg and 210-240Wh/L. Thebattery is 90 s graduallyrealize industrializationPANASONIC VW-VBK360 Battery, and the first to use inthe cell phonebattery.At present althoughiton their dominance of the gradually belithiumionbattery replaced, but mobile phoneapplications inEuropeand America, andits marketshare isstillat about 50%.
Thelithiumionbattery (Li-ion) isby canmake thelithiumion embedding andtake off thecarbon embeddedasnegative, reversible intercalated-li metal oxideas the positive (LiCoO2, LiNiO2 or LiMn2O4) and organic electrolyte constitute, the working voltage of 3.6 V, so alithium-ionbattery is equivalent to three cadmium nickel metal hydridebattery or nickel. Thus the batteries than energy is theover 100Wh/kg and 280Wh/L, and considerablymore than the nickel metal hydridebattery than energy. Inview of the above advantages, since the 1993-2000 in just a few years,its production and usage with extremely high speed growth.
Alkaline manganese zincdry (alkaline) compared with ordinarydrycell sizehas higher capacityPANASONIC CGA-S005E Battery, and have high discharge current ability. In recent yearshas been usedon mercury zincpowder, thereforemake thebattery become agreenbattery, and become the mainstreambattery products,at present the alkaline xinmengdrycell isstillBPmachine use mostpower supply.At the sametime,the world is thebattery chargedon thesex, an American companyhas launched a chargedbattery alkali manganese, productand application of slow growth. Such batteries keep thebattery discharge characteristics, but also can be recharged using a dozentimes to hundreds oftimes (deep recharge cycleslife of about 25times).
Lithium plasticbattery (LIP) is forlithium metal anode, conductive polymers of electrolyte for newbattery, the energy thanhas reached 170Wh/kg and 350Wh/L. Thelithiumionbattery iswill present plastic of organiclithiumionbattery electrolyte stored in a polymer membrane, or use conductive polymeras electrolyte,make abattery in no free the electrolyte. Such batteries can use aluminum plasticcomposite membranerealize hot pressing encapsulation, withlight weight, shape can be arbitrarychange, safety better characteristics.
Fuelcells (FC) is a kind of use offuel (suchas hydrogen or containfuel)and antioxidant (suchas pure oxygen or the oxygen inair) forpower generation device directly, because avoided the carnot cycle limit, thispower unit is notonly high efficiency (electrochemical reactions conversion efficiency can beas highas 40% ormore), and no pollution dischargegas, so is the future of efficient andcleanpower generation method. Many companiesathomeand abroad areengaged in development for mobilephones, notebook computers, the PEMfuelcell,once put intoapplication, andits economybenefit greatly.
Seallead-acidbattery is a kind oflead-acid batteries.
The following newgreenbattery technology and related industry development is rapid.
1. Hydrogen storage material and nickel metal hydrideBattery-thenimh batteries (PANASONIC CGA-S101E/1B Battery)
2.Lithiumion embedded material and liquid electrolyte oflithiumionbattery
3. Polymer electrolyte oflithiumbattery orlithiumionbattery
4. Zincairbattery and PEMfuelcell
In addition to the above, inview of the communication industry growth,China'sbattery industry is with extremely high speed to promote environmental protection mercury-free alkali manganese zinc original pool and rechargeable batteries andseallead-acidbattery technology developmentand application expansion market.
If users want to prolongbattery the efficient use ofthe time, in addition to the quality of the charger to have the guarantee, the right skills and charging is essential, because oflow quality charger or wrong charging methods would affectbatterytime andlife cycle, the following is about to charge skills:
1. Thebattery before they leavethe factory,manufacturers were activatedprocessing, and the charge, so thebattery aremore electricity, myfriends saybattery charging adjustment period in accordance withthe time, standbystill seriously insufficient,assuming that thebattery is really quality goodsbattery of words, this kind of circumstance shouldextend the setting and then 3 ~ 5times fully charge and discharge.
2. If new phone islithiumionbattery, so before 3 ~ 5times charging commonly knownas adjustment period, should be chargedmore than 14 hours, in order to ensure that the fully activatelithiumion activity. Thelithiumionbattery no memory effects, but have very strong suisex, should give full activatedPANASONIC CGR-D220 Battery, to guarantee the use of after canreach the right performance.
3. Some automation intelligent quick charger when instructionslightschange, saidonly full of 90%. The chargerwill automaticallychange with slow chargewill batteries. Bestwill use after batteries,otherwise,itwill shorten usetime.
4. Before charging and discharginglithiumbatterydoes notneed special, butwill not dischargedamage to thebattery.As faras possible when chargingat the slow ChongChongDian, reduce the way quick charge;Timedon'tmore than24 hours. Thebattery after three tofivetimes fully recharge cycles of internal after chemicalwill beall "activate" to achieve the best use effect.
5. Please usethe original or the reputation of the good brand charger, li-ionbattery tolithiumbattery charger with special, and follow the instructions,otherwise,itwilldamage to thebattery, and even dangerous.
6. Havemany users often in chargestill leave hercell phone, actually suchwill be very easy toPANASONIC CGA-S101E/1B Batterydamage the servicelife of the mobile phone, because in charge of the process, the circuit boards of mobile phone can calorific, if thistimemore exotic phone,may produce instant backflow current, internal parts to mobile phonedamage.
7. Thebatterylife dependson thenumber repeatedly charging and discharging, so shouldtry to avoidmorebattery electric charge when, thiswill shortenbatterylife.Cell phonetimemore than 7days, supposed to completely dischargethe cell phonebattery, enough electricity before use.
8.The cell phonebattery have self-discharge,need not when thenimh batterieswill press the residual capacity every day, about 1% of the discharge,lithiumbattery every day to 0.2% ~ 0.3% discharge. In for thebattery,try to use the special socket,don'twill thehome appliance suchas the Shared and theTV charger socket.
9. Though thephones inthe network coveragearea, but inthe cell phone charge,cellphones have been unable toaccept and call.At this time, can use of the mobile phone is not transfer function,will be transferred to the mobile phone side of fixedtelephone in order to prevent callslost, this kind of method for mobile phone is not inthe network coverage of thearea or weaksignal and temporarily unable to the applicable also.
10.Don'twill be exposed to high temperature orcoldPANASONIC DMW-BCG10E Battery,asthe dog, should not put the phoneon thecar, and thesun blazed through the; Orgetair conditioning room, inair conditioning to be blown continuously place. When charging, thebattery is alittleheat is normal, but can't letit what the high temperature "suffer". In order to avoid the happening of this kind of circumstance, had better be in chargeat room temperature, anddon't coveranythingon the mobile phone.
11. Nickel cadmium (N iCd) before thebattery must ensure that the batteries are no electricity, recharging thebattery must ensure that sufficient electricity after.
12. Ifthe cell phonebattery placed too long and not use, the bestmaintenance department tocellphones to theapplication for aliveprocessing, also can use a constantdc voltage is the voltage adjustment for 5 ~ 6 V, current 500 ~ 600mA reverseconnectbattery.Note that a touch namely release,the most repeated threetimes can, through such treatment afteranother, withthe originaladapter to "adaptation" charge.
13. Charge is notas longas possible, to no protection circuit batteries that should stop after charging, or thebatterywill withfever or overheating impact performance.
14.Lithiumionbattery must choose special charger,otherwisemay notreach the saturatedstate, affect their performance. Charging completes, should avoid to place in chargeronmore than12 hours ormore, long-termneed not when shouldmake abattery andcell phoneseparation.
First the capacity of thebatterylife and said.
Battery capacity everybody can understand, is the capacity of thebattery label printing!The greater the capacity to store electricity standbytimemore longmore, but thebatterylife is put in charge of the circulation to describe, that is a charging a discharge for a cycle, now of thelithiumionbattery general circulation 400times the capacity of the nominal capacity is 50%-60%, professional predicate calledattenuationrate, the capacity of thebatteryonly nominal halfway through standbytime and just boughtat leastby half, also is usually we the standbytime behind mobile phone to the shorter and thelast possible is a call to restart,it shows that capacity is too small, thebattery with load ability is poor,and also tolife! The above prove chargingtimes and thebatterylife is to have a certain relationship! General filling a electric capacitywillattenuation 1-5ma (dependingon the stand or fall ofcore).
Besides the new bought the phone chargingtime(PANASONIC DMW-BMB9 Battery)
General new buy the phonewill be informed that the three twelve hours filling, must be finished fillingagain! Theidea is tostay in about 98-2000, when most ofthe cell phonebattery is nickel metal hydridebattery, have memory effects! That is thenimh batteries in uselessover electricpower is charging, might remember situation, that didn't putout that part ofitmay belost if not to do so might affect thebattery of standbytime, now a few callall the mobile phone uselithiumionbattery now,does not exist have memory effects, say in the production of thebatterywill haveat least 1-2times charge-discharge, sold into our hands, thebattery is activated, sure, twelve hours without charge,as for a fewtimes before standbytime slightly shorter that is normal, because thebattery after a period oftime capacitywill have loss, filling put several recovery!
Besides charging methods (PANASONIC DMW-BCF10E Battery)
Normallywilllastonecase electricity use up, cellular phone to start alarm can charge!Don'tneed to beautomatic shutdown to filling! Because when thebattery voltage alarmhas been close to theautomatic shutdown voltage! Charging tip can notonly full!Itneed not longtime filling, of course, have been filled,itdoesn'tmatter, becausethe cell phonebattery is protection board, fullautomatic stop after won't fill! But some fake exceptbattery, a lot of falsebattery protection board isempty,doesn't work.
Digital camerabattery is thekey for thekey, second in importanceonly lens I’m afraid, and in order to photograph inyourheart, apowerfulbattery to providepoweras a follow-up is essential. But even the bestbatterytime, if not properly carryout maintenance and maintenance,will nottake long to lose the strongpower, sobattery maintenance is very important.
Battery Maintenance
For a (section)digital camerabattery for the duration of use, not justits quality,poweron, infact, the use of operations with theuser alsohas great relevance. Most photographers are used after every use of the cameraon the camera bag inside, oron the cupboard, tookout thebattery is not kept separately, this approach sounds fine, but not conducive tobattery protection.
Ifmore than 15days do not usually use the camera,it is best to remove thebattery from the camera inside the store alone, save the environment,it is best todry andcool place, and do not store thebatterytogether with metal objects.
According to our survey,you can buy in the market mostdigital cameras uselithium batteries,it is relatively easy to store. Theonly caveat is that if not used for long, preferablyat intervals of 2 months to activate abattery, which is the charge and dischargetime, this can effectivelyextendbatterylife.
As for theNi-MHbattery 5,the most annoying is the memory effect, this effectwill reduce the overallbattery capacity and the use oftime,and astimegoeson, less and less stored charge, thebatterywill consume themoreyou have to faster. Therefore, we shouldtry to runout ofpower rechargeable, each charge must be sufficient topowerthe most full.
Ifyougoout, the temporary use of alkaline batteries, we must remember thattimeout, or when unused for long periods, thebattery is easy to Tangshui corrosion circuit, thedigital camerabattery could not escape thedestiny scrapped.
Forusers of alkaline batteries, already mentioned above, remember thepoint is finished using thedigital camera, remove thebattery must remember to avoid the phenomenon ofcellsap anddamage themachine.
As for the use of rechargeable nickel-metal hydride batteries andlithiumusers.Battery charge is very particular about, bought back the batteries are generally verylow or nopower consumption, the first charge must be adequate.Lithiumbattery chargingtime is generally longer than 8 hours, while theNi-MHbattery chargingtime is generallymore than 16 hours. To achieve best results, that is, thebatteryhas reachedits maximum capacity, generallymore than 3times repeated charge-discharge can.Battery with threetimes, the best opportunity to find a completely exhaustedbattery to chargeagain,try not to charge thebattery when there are remnants of repeated charge, orwill shortenbatterylife. After thebattery charge is generallymoreheat,it is best to becool and then into the camerabattery.
Butnote thatlithium batteries because there is no memory effect, so do not discharge,otherwiseitwilldamage thedigital camerabatterystructure, loss ofbatterylife.
In addition, in order to avoid the loss of electricity, the use of nickel-metal hydridebatteryuser, charging is completed, remove thebattery, do not let thebattery contact with the conductor while the positive andnegative poles, for example, do not useyour fingers touch bothends of thebattery. The use oflithiumusers shouldtry to keep the camera inside thebattery positive andnegativebattery contactsclean, if necessary, wipe with adry cloth and then gently wipe thebattery.
Alsonote that, even if theuser is to uselithium batteries,digital camera in a longtime when not in use, should be completely discharged, remove thebattery, stored in adry,cool environment. The other thing tonote is that both the nickel-hydrogen batteries orlithium batteries using theuser,it is best not to have a chargedbatteryon the purse, pocket, bag or container with metal objects, in order to prevent short-circuit .
Digital camerabatterypower Dafa:
1, to avoid frequent use offlash: Ifyou are not professional photographers, then, except in the invisible fingers of the night, thelight intensity of an ordinary day for the averagedigital camera,it is enough.
2,try to avoid unnecessaryzoom operation:zoom the camera lens stretcheditout a reduction, ispowerdigital camerabattery.You canmove the pace of hyperactivity, with “artificialzoom” approach instead of “camerazoom” to savepower.
3, Do not let thescreenhas beenlit: If thecase of smallpower, can turn off theLCDscreen, usethe viewfinder to adjust the picture composition, is for adigital camera,LCD should be consideredthe mostpower-hungry components, generaldigital camera,LCDscreen after closingtime can be used whenthe original length of about 3times.
4, less shooting and video: minimize the use of multi-shot feature and video capture video,as the completion of these functions is to use the built-in bufferbody to temporarily save thescreen shot, thepower consumption a lot.
5, should not frequentlyopen, shut down: Manyusers know that the display stayslit ispower, so in order to save electricity use to frequentopening and shutdown. Infact, frequentlyopen, shut down the electricity wasted consumption thanbright display evenmore, especially for larger diameter lenses, but also requires a substantial expansion of the camera, theswitch ispower. Mostdigital cameras haveautomatic shutdown option, thissetting should not beset too short,otherwise easilylead to frequentopening and shut down. Of course, frequent artificialopening, shut down and should be avoided.
6, opticalimage stabilization not normallyopen: Opticalimage stabilization isby driving the lens orimage sensor pack components, offsetby the subject matterimages and the relativemotion between the sensor achieved. Either way the opticalimage stabilization, would result in no smallpower consumption, in particular some models can be anti-shake mode isset to “alwayson” so thatpower losswill be causedby themorepowerful. To this end, we have agood scene in thelight should turn off the opticalimage stabilization feature,you must use, should also be less “alwayson” mode.
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February Withthe world going mobile and billions of new devices requiring electrical storage,battery technology is almost certainly due for a renaissance in the near future and recent developments suggestMIT will play a role in thenext significantbattery technology. Less than a week ago, we reportedon workbeing donebyMIT's Laboratory for Electromagnetic and Electronic Systems (LEES) that could become the first technologically significant and economically viablealternative to conventional batteries in 200 years. Now a second new and highly promisingbattery technology is emerging fromMIT - a new type oflithiumbattery that could become a cheaperalternative to the batteries that nowpower hybrid electriccars.
Until now,lithium batteries have not had the rapid charging capability or safetylevel needed for use incars. Hybridcars now runon nickel metal hydride batteries, whichpower an electric motor and can rapidly recharge while thecar is decelerating or standingstill.
Butlithium nickel manganese oxide, described in a paper to be published in Scienceon Feb. 17, could revolutionize the hybridcar industry -- a sector thathas "enormous growth potential," says Gerbrand Ceder,MIT professor of materials science and engineering,wholed the project.
"The writing ison the wall.It's clearly happening," said Ceder,who said that a couple of companies are already interested in licensing the newlithiumbattery technology.
The new material ismore stable (and thus safer) thanlithiumcobalt oxide batteries, which are used topower small electronic devices likecellphones, laptop computers, rechargeable personaldigitalassistants (PDAs) and such medical devicesas pacemakers.
The small safety risk posedbylithiumcobalt oxide is manageable in small devices butmakes the material not viable for the larger batteries needed to run hybridcars, Ceder said.Cobalt is also fairly expensive, he said.
TheMIT team's newlithiumbattery contains manganese and nickel, which are cheaper thancobalt.
Scientists already knew thatlithium nickel manganese oxide could store a lot of energy, but the material took too long to charge to be commercially useful. TheMIT researcherssetout to modify the material'sstructure tomakeit capable of charging and dischargingmore quickly.
Lithium nickel manganese oxide consists of layers of metal (nickel and manganese) separated fromlithium layersby oxygen. Themajor problem with the compoundwas that the crystallinestructurewas too "disordered," meaning that the nickel andlithium were drawn to each other, interfering with theflow oflithium ions and slowing down the chargingrate.
Lithium ionscarry thebattery's charge, so to maximize the speedat which thebattery can charge and discharge, the researchers designed and synthesized a material with a very ordered crystallinestructure, allowinglithium ions to freelyflow between the metal layers.
Abattery made from the new material can charge or discharge in about10 minutes -- about10 times faster than the unmodifiedlithium nickel manganese oxide. That bringsit muchcloser tothe timeframe needed for hybridcar batteries, Ceder said.
Before the material can be used commercially, the manufacturing process needs to be made less expensive,and a few other modifications will likely be necessary, Ceder said.
Other potential applications for the newlithiumbattery includepower tools, electric bikes, andpower backup for renewable energy sources.
Thelead authoron the research paper is Kisuk Kang, a graduate student in Ceder's lab. Ying Shirley Meng, a postdoctoralassociate in materials science and engineeringatMIT, and Julien Breger and Clare P. Grey of theState University ofNew Yorkat StonyBrook are also authorson the paper.
The researchwas fundedby theNational Science Foundation and the U.S. Department of Energy.
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1, about the trickle charge, rapid charging and stablebattery charging algorithm
According to the energy requirements of thefinalapplication, abatterymay contain up to 4lithiumion orlithium polymerbatterycore,its configuration will have a variety ofchange,at the sametime with amainstreampoweradapter: directadapter,USBinterface orcar charger. Remove thecore quantity,core configuration orpoweradapter type difference, thebatteryhas the same charge characteristics. So they charge algorithm.Lithiumion and li-ion polymerbattery best charging algorithm can divided into three phases: trickle charge, rapid charging and stable charge.
Advancedbattery charger withadditional security function normally. For example, if thecore temperature exceeds the given window, usually 0 ℃-45 ℃, charge will be suspended.
Remove some verylow-end equipment, nowon themarket/li-ion polymerlithiumionbattery solutions are integrated with theouter components or, inaccordance with the characteristics of the charging to charge, this is not just toget better effect charge, but also for safety.
LTC4097 can be used to exchangeadapter orUSBpower supply for single quarter/polymerlithiumionbattery. Figure 1 fordouble input 1.2 Alithiumbattery charger LTC4097schemes.It USES constant current/constant voltage algorithm charging, from exchangeadapterpower charge, programmable filling up to 1.2 electric current A, and withUSBpower can beas highas 1 A,at the sametime,automatic detection in each input voltage whether there. This device also provideUSB the current limit.Applications includePDA,MP3players,digital camera,lightportable medical andtest equipment andbigcolor cellular phone. The performance characteristics: no external micro controller charging termination; The inputpowerautomatic detection and choice; Through the resistance fromthe exchange of chargingadapter input can beas highas 1.2 A programming charge current; The resistance of programmableUSB charging current is up to 1 A;100% or20%USB charging currentset; The inputpower output and existing bias NTC (VNTC)pinas a120mA drive ability; NTC thermistors input (NTC)pin for temperature qualified charged; Pre-settingsbattery voltage with floating plus or minus 0.6%accuracy; Thermal regulationmaximize chargerate and free hotair LTC4097 can be used to exchangeadapter orUSBpower supply for single quarter/polymerlithiumionbattery. The use of constant current/constant voltage algorithm charging, from exchangeadapterpower charge, programmable filling up to 1.2 electric current A, and withUSBpower can beas highas 1 A,at the sametime,automatic detection in each input voltage whether there. This device also provideUSB the current limit.Applications includePDA,MP3players,digital camera,lightportable medical andtest equipment andbigcolor cellular phone.
2,lithiumion/polymerbatteryscheme
Lithiumion/polymerbattery chargescheme for differentnumber ofcore,core configuration, andpower types are different.At presentmainly have threemain chargingscheme:linear, Buck (step-down)switch and SEPIC (booster and step-down)switch.
When the input voltage inbig with the charger with sufficient clearance ofcore afteropening voltage,it islinearscheme, especially 1.0 C fast charging current than 1 Abig too much. For example,MP3players usuallyonlyonecore, capacity from 700 to 1500mAh differ, full charge voltage isopen 4.2 V.MP3 playerpower is usually theAC/DCadapter orUSBinterface, the output is the rule of 5 V;At this time, thelinearscheme isthe most simple, most charger of the efficiency of thescheme. Figure 2 shows forlithiumion/polymerbattery solutionlinearscheme,basicstructure andlinear voltageneat device.
MAX8677A isdouble inputUSB/ACadapterlinear charger, built-inSmartPower Selector, used for rechargeable single quarterby Li + batteriesportable devices. The charger integration of thebattery andthe externalpower source and loadswitch chargingall thepowerswitch, so that no externalMOSFET.MAX8677A ideal used inportable devices, suchassmartphones,PDA,portable mediaplayers,GPS navigation equipment,digital camera, anddigital cameras.
MAX8677A can work in independentUSB and thepower inputACadapter ortwo input eitherone of the input. Whenconnecting externalpower supply, intelligentpower source selectorallows the system notconnectbattery or can and depth dischargebatteryconnection. Intelligentpower source selector willautomaticallyswitch to thebattery system load, use the system did not use the inputpower supply parts forbattery,make full use of limitedUSBand adapterpower supply input.All theneeded electric current detection circuit, including the integration of thepowerswitch,all integration in the piece.DC input current highest limit can be adjusted to 2 A andDC andUSB inputall can support100mA, 500mA, andUSB hung mode. Charge current can be adjusted toas highas 1.5 A, thus support wide range ofbattery capacitive. Other features includeMAX8677A thermal regulation,over-voltage protection, charging status and fault output,power supply good surveillance,battery thermistors surveillance, and chargingtimer.MAX8677A using save a space, hot enhanced, 4mm x 4mm,24 of thepins TQFN encapsulation, regulations, work in exceptional temperature range (40 ~ + 85 ℃).
2.2 Buck (step-down)switchscheme
When A 1.0 C of the charging currentmore than 1 A, or the input voltage of thecore than withhigh voltageopenmany, Buck or step-down plan is A better choice. For example, basedon the hard drive in thePMP, often use singlecorelithiumionbattery, the full ofopen is 4.2 V voltage, capacity from1200 to2400mAh range. And nowPMP is usually use thecar kit to charge,its output voltage in a 9 V to 16 between V. In the input voltage andbattery voltage is the voltage difference between high (minimum 4.8 V) willmakelinearschemelowers efficiency. This kind oflow efficiency, plusmore than 1.2 A 1 C fast charging electric current, have seriousheat dissipation problems. To avoid this kind of situation, will the Buckscheme. Figure 3 forlithiumion/polymerbattery chargerscheme Buck diagram,basicstructure with Buck (step-down)switching voltage regulators completely the same.
2.3 SEPIC (booster and step-down)switchscheme
In some use of three or fourlithiumion/polymercore series equipments, charger of the input voltage is notalways greater than thebattery voltage. For example, laptop computers use 3corelithiumionbattery, full charge voltage isopen12.6 V (4.2 Vx3), capacity is 1800mAh to 3600mAh from.Power supply input or output voltage is 1 6 VAC/DCadapter, or iscar kit, the output voltage in a 9 V to 16 between V. Apparently, thelinear and Buck solutions are not for thisgroup of batteries. This is about to use SEPICscheme,it can in the output voltage is higher than when thebattery voltage, can be in the output voltage less than when thebattery.
3, andpower detection algorithm is proposed
Manyportable products use voltage measurements to estimate the remainingbatterypower, but thebattery voltage and surpluspower relationship but will with the dischargerate, temperature andbattery aging degree ofchange,make this kind of method cantop 50%margin of error. Themarket for longer to use product demand unceasingly strengthens, so the system design personnelneedmoreaccurate solution. Use capacity check plan come to measurebattery or consumption of electricity, will be in a wide range ofapplicationpower to providemoreaccurate estimate of thebatterypower.
3.1power detection algorithm isone ofthe examples ofapplication, function complete list,double thebatteryportablebatteryapplication design
Thebattery circuit description. Figure 4 (a) can be used for identification ofIC functions with typicalapplication circuit batteries.According to the use ofICtesting program is different, thebatteryneeds to haveat least three to four outside the terminal.
VCC and BATpins will even to thebattery voltage, so that for, Cpower and thebattery voltage measurement. Thebattery isconnected a grounding resistance smaller detection resistors, let capacity check meter high impedance SRP and SRN input can monitor sensor resistanceon bothends of the voltage. Throughtesting the currentflows through a resistor can be used to judge thebattery or release the amount of electricity. Designers choose detection resistance value must be considered when resistanceon bothends of the voltage can'tmore than100mV,low resistancemay bemore hours in current errors. Circuit board layout must ensure that SRP and SRN totesting fromas closeas possible to theconnection of the resistor sensor resistance end; In other words, they should be the Kelvinattachment.
HDQpinneed external and resistors, this resistance should be located the host or themainapplication, such capacity check plan to thebattery andportable devices when sleep functionenableconnection broken. Advice and resistance choose10 k Ω.
Once thebattery through the appraisal, bq26150 will issuecommands to ensure that the host and quantitytest plan ofmaterial lines between normal communication. When thebatteryconnection interruption or toconnect,the whole the identification process will be repeatedagain.
Host to be able to read capacity check plan of variable voltage measurementbattery, tomake sure the end of discharging threshold and charging terminate threshold.As for the remainingstatepower (RemainingStateofCapacity), do notneed to read can use directly.
The above bq2650x and bq27x00etc capacity check plan provides thebatterymanufacturer a simple to use options, thisscheme L [just measuringbattery voltage to be precise, so these capacity check plan can be applied to variousbatteryframework, and can support thebattery identification anddouble thebatteryapplication '
3.2power detection algorithm is an example ofapplicationsanother, can apply toall kinds of general voltmeter newIC.
Today'smanymanufacturers can provide a variety of voltmeterIC,, theuser can choose the suitable function device, to optimize the product price. Use voltmeter measurement of storagebattery parameters, the separate architectureallowsusers in the host custompower measurement algorithm within. Eliminating embedded processorbattery cost.On this to Dallase semicconductor company called cases of DS2762chip for typical analysis. A new separate voltmeterIC,itsstructure see chart 5 (a) below.
DS2762 is a single quarter oflithiumbattery voltmeter and protection circuit, integrated into a tiny 2.46mm x 2.74mm inversion of packaging. Due to internal integration forpower detection of high precise resistance, this device is very save a space.It is the small size and incomparable highlevel of integration, for mobile phonebattery and other similar handheld products, suchasPDA,etc, areall very ideal. Integrated protection circuit continuously monitoring thebattery voltage,over voltage andflow fault (charging or discharge period). Different from the independent protectionIC, DS2762allowmain processor surveillance/control protection FET conductionstate, such, can DS2762 through the protection of thepower system and the control circuit implementation. DS2762 can also charge abattery consumptionhas depth, when thebattery voltage within three V, provide a limit of the charging current recovery path.
DS2762accurate monitoringbattery current, voltage and temperature, the dynamic range andresolution ofcommon satisfy any mobile communication producttesting standards. The measurement of current for internally generated when the integral,realize thepower measurement. Through the real-time, continuousautomatic disorders correct, the precision ofpower measurement can be increased. The built-in measuring resistance due to eliminatemanufacturing process and temperature and cause resistancechange, further improve the precision of the voltmeter. Important data stored in 32bytes, canadd the lock EEPROM; 16bytes ofSRAM are used to keep dynamic data. And DS2762all communicationall through the 1-Wire,more communicationinterface node, minimize thebattery and theconnection to the host.Itsmain features for; Single quarter oflithiumbattery protector; High precision current (power measurement), voltage and temperature measurement; Optional integrated 25 m Ω measuring resistance, each DS2762 after fine-tuning alone; 0 Vbattery restore charge; 32bytes can lock EEPROM, 16bytesSRAM, 64 aROM;
1-Wire, node,digital communicationinterface; Supportmorebatterypower management, and through the protection system control FETpower; Dormancy modepower supply currentonly 2 µ A (most); Work modepower supply current for 90 µ A (most); 2.46mm x 2.74mm inversion of packaging or 16 feet SSOP packageled, and both are can choose with or without detection resistance; Afterhas with e
