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src="http://tyunfile.71360.com/UploadFile/whgrs888/637153146171962891/4574552.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="d3sphev" class="smallimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UploadFile/whgrs888/637153146171962891/4574552.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="k8jgnpb" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價(jià)格要求：</span>面議</p><p><span>所在地：</span>湖北省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>江蘇軟包電池實(shí)驗(yàn)線哪家好,電池</p><p><span>***更新：</span>2021-01-28 00:13:24</p><p><span id="click" >瀏覽次數(shù)：1次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="222lnu8" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">武漢格瑞斯新能源有限公司</a></p><p><span>聯(lián)系人：</span>陸小娜</p><p><span>郵箱: </span>cxg@grsxny.com</p><p><span>電話: </span>13517293928</p><p><span>傳真: </span>027_63499883</p><p><span>網(wǎng)址: </span></p><p><span>手機(jī): </span>027-63499883</p><p><span>地址: </span>光谷大道3號(hào)激光工程設(shè)計(jì)總部二期研發(fā)樓06幢06單元15層5號(hào)</p><p>[當(dāng)前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="so72ary" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="293ac8h" class="box"><p><p> <span style="font-size:16px;">鋰電池的充電電路</span> </p> <p> <br /> </p> <p> <br /> </p> <p> <span style="font-size:16px;">在了解完鋰電池的基本電路特性后，工程師在開(kāi)發(fā)帶有鋰電池供電的項(xiàng)目時(shí)，就會(huì)面臨鋰電池的充電電路問(wèn)題。</span> </p> <p> <br /> </p> <p> <br /> </p> <p> <span style="font-size:16px;">鋰電池的電壓為3.0V ~ 4.2V之間變化，也就是鋰電池的電壓為4.2V，小電壓為3.0V。電壓與小電壓，對(duì)于鋰電池而言，隱藏著什么電路含義呢?</span> </p> <p> <br /> </p> <p> <span style="font-size:16px;">單節(jié)鋰電池</span> </p> <p> <br /> </p> <p> <br /> </p> <p> <span style="font-size:16px;">電壓是4.2V，也就是鋰電池兩端能承受的極限電壓不超過(guò)4.2V;小電壓為3.0V，也就是鋰電池兩端的極限放電電壓不低于3.0V;</span> </p> <p> <br /> </p> <p> <br /> </p> <p> <span style="font-size:16px;">換言之，它的另外一層電路意義是</span> </p> <p> <br /> </p> <p> <br /> </p> <p> <span style="font-size:16px;">鋰電池在接收外界的充電電路充電，它的充電電壓不能高于4.2V;鋰電池在向外界負(fù)載提供工作電源，它消耗的電壓會(huì)停留在3.0V;</span> </p> <p> <br /> </p> <p> <br /> </p> <p> <span style="font-size:16px;">基于此，如果工程師將常用的5V/1A或者5V/2A規(guī)格的充電器，對(duì)鋰電池進(jìn)行直接充電，這樣是否可以呢?</span> </p> <p> <br /> </p> <p> <span style="font-size:16px;">充電器</span> </p> <p> <br /> </p> <p> <br /> </p> <p> <span style="font-size:16px;">顯然是不行的，江蘇軟包電池實(shí)驗(yàn)線哪家好。為什么呢?</span> </p> <p> <br /> </p> <p> <br /> </p> <p> <span style="font-size:16px;">因?yàn)闊o(wú)論是5V/1A或者5V/2A規(guī)格的充電器，對(duì)外輸出的充電電壓均為5V，超過(guò)了鋰電池的承受電壓4.2V，江蘇軟包電池實(shí)驗(yàn)線哪家好。</span> </p> <p> <br /> </p> <p> <br /> </p> <p> <span style="font-size:16px;">針對(duì)這兩個(gè)電壓不匹配兼容的問(wèn)題，江蘇軟包電池實(shí)驗(yàn)線哪家好，該如何去解決呢?在不改變充電器5V/1A和5V/2A規(guī)格的條件下，工程師應(yīng)當(dāng)如何去實(shí)現(xiàn)呢?</span> </p> <p> <br /> </p> <p> <br /> </p> <p> <br /> 武漢格瑞斯專業(yè)從事電池檢測(cè)設(shè)備，電化學(xué)工作站和電池整套實(shí)驗(yàn)設(shè)備的廠家，歡迎您來(lái)電咨詢！江蘇軟包電池實(shí)驗(yàn)線哪家好</p> <span style="font-size:16px;"><span style="font-size:16px;"></span><span style="font-size:16px;"></span></span><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="江蘇軟包電池實(shí)驗(yàn)線哪家好,電池" src="http://tyunfile.71360.com/UploadFile/whgrs888/637153146171962891/4574552.png"></div><p> <span style="font-size:16px;"> 電池倍率充放電測(cè)試一般分為3 種形式，相同倍率充電不同倍率放電、不同倍率充電相同倍率放電和不同的倍率充放電測(cè)試。下面以充放電電壓窗口為3.0～4.2 V 的扣式電池測(cè)試為例進(jìn)行介紹。</span> </p> <p> <span style="font-size:16px;"> 電池連接測(cè)試儀器并置于穩(wěn)態(tài)環(huán)境中，靜置5 min;以0.5 C 電流放電至3.0 V，靜置10 min 后以0.5 C 恒流充電至4.2 V，在4.2 V 恒壓至電流下降為0.05 C 截止，然后以不同形式進(jìn)行倍率充放電測(cè)試。</span> </p> <p> <span style="font-size:16px;"> 相同倍率充電不同倍率放電的實(shí)驗(yàn)流程為：靜置5 min 后以不同的倍率放電至3.0 V，并記錄放電容量，靜置10 min 后以0.5 C 恒流充電至4.2 V，在4.2 V 恒壓至電流下降為0.05 C 截止。不同倍率充電相同倍率放電的實(shí)驗(yàn)流程為：靜置5 min 后，以0.5 C 倍率恒流放電至3.0 V，靜置10 分鐘，然后以不同倍率恒流充電至4.2 V，在4.2 V恒壓至電流下降為0.05 C 截止。</span> </p> <p> <span style="font-size:16px;"> 不同的倍率充放電的實(shí)驗(yàn)流程為：靜置5 min后，以不同的倍率恒流放電至3.0 V，靜置10 min，然后以相同的倍率(電流)進(jìn)行恒流充電至4.2 V，在4.2 V 恒壓至電流下降為0.05 C 截止。</span> </p> <p> <span style="font-size:16px;"> 根據(jù)測(cè)試形式，改變不同的倍率重復(fù)上述某個(gè)實(shí)驗(yàn)流程，充放電倍率由低到高(一般為0.2 C、0.5 C、1 C、2 C 以及5 C 等更高倍率)。建議相同倍率充放電循環(huán)5～10 次。</span> 江蘇圓柱電池測(cè)試儀價(jià)格武漢格瑞斯新能源有限公司主營(yíng)項(xiàng)目產(chǎn)品有電池配件，軟包電池設(shè)備，圓柱電池設(shè)備，紐扣電池設(shè)備，除濕機(jī)組。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="江蘇軟包電池實(shí)驗(yàn)線哪家好,電池" src="http://tyunfile.71360.com/UploadFile/whgrs888/637153146631191406/370372.png"></div><p> <span style="font-size:18px;"><strong>電池測(cè)試儀公司</strong></span> </p> <p> <span style="font-size:16px;">武漢格瑞斯新能源有限公司，</span><span style="font-size:16px;">一家專業(yè)以研發(fā)、生產(chǎn)、銷售充放電老化柜、保護(hù)板測(cè)試儀和電池檢測(cè)設(shè)備為主的****，公司憑借強(qiáng)大的技術(shù)開(kāi)發(fā)實(shí)力、先進(jìn)的測(cè)試檢驗(yàn)經(jīng)驗(yàn)，開(kāi)發(fā)出一系列的鋰電保護(hù)板、電池、flash、CPU生產(chǎn)線等**檢測(cè)儀器設(shè)備。公司產(chǎn)品深受客戶好評(píng)，特別是高精度的測(cè)試參數(shù)及快速的測(cè)試速度，滿足了廣大廠家的科研需求及生產(chǎn)線大批量檢驗(yàn)需求。同時(shí)我們還根據(jù)客戶的特別需要，進(jìn)行產(chǎn)品定做。隨著公司不斷發(fā)展壯大。公司擁有一批國(guó)內(nèi)不錯(cuò)的技術(shù)人才，我們一直以"天將降大任于斯人也"勉勵(lì)自己在產(chǎn)品的開(kāi)發(fā)、設(shè)計(jì)和生產(chǎn)上嚴(yán)格把關(guān)，做到精益求精，時(shí)時(shí)刻刻為客戶著想，公司的宗旨是"團(tuán)結(jié)、誠(chéng)信、效益"。公司不單為客戶提供相當(dāng)不錯(cuò)和**技術(shù)的產(chǎn)品，同時(shí)也為客戶提供相當(dāng)不錯(cuò)的售后服務(wù)，以保障所提供產(chǎn)品順利正常地運(yùn)行</span><span style="font-size:16px;">。</span> </p><p> <span style="font-size:16px;">極化和內(nèi)阻</span> </p> <p> <br /> </p> <p> <span style="font-size:16px;">電池放電時(shí)所有這些能量都不能完全轉(zhuǎn)化為電能，電化學(xué)反應(yīng)總是伴隨著能量的損失，這些能量損失包括：1）活化極化--它引起電極表面的電化學(xué)反應(yīng) 2）濃差極化--它是由于電極表面和體相中反應(yīng)物和產(chǎn)物濃度的不同而產(chǎn)生的，是物質(zhì)傳遞的結(jié)果。極化的存在消耗了部分能量，并以熱的形式放出。</span> </p> <p> <span style="font-size:16px;">極化（polarization）</span> </p> <p> <span style="font-size:16px;">電池在充放電過(guò)程中是存在極化的，通?？蓪囯x子電池極化分為歐姆極化、電化學(xué)極化和濃差極化三類。幾類極化各自的響應(yīng)速度也不一樣。影響極化程度的因素很多，但一般情況下充放電電流密度越大，極化也就越大。</span> </p> <p> <span style="font-size:16px;">以下分類解釋一下：</span> </p> <p> <span style="font-size:16px;">(1)歐姆極化</span> </p> <p> <span style="font-size:16px;">顧名思義，有鋰離子電池的歐姆內(nèi)阻引起的極化，叫歐姆極化，也成電阻極化。電池的歐姆內(nèi)阻(R)由電極材料、電解液、隔膜電阻及各部分零件的接觸電阻組成（有些解釋還把膜電阻也算上），通過(guò)一定的電流時(shí)，其極化電勢(shì)可以計(jì)算，E=IR(歐)。</span> </p> <p> <span style="font-size:16px;">歐姆極化是瞬時(shí)發(fā)生的。</span> </p> <p> <span style="font-size:16px;">(2)電化學(xué)極化</span> </p> <p> <span style="font-size:16px;">指由于正、負(fù)極上電化學(xué)反應(yīng)速度小于電子運(yùn)動(dòng)速度而造成的極化。電化學(xué)極化一般認(rèn)為是微秒級(jí)的</span> </p> <p> <span style="font-size:16px;">(3)濃差極化</span> </p> <p> <span style="font-size:16px;">指由于參與反應(yīng)的鋰離子在固相中的擴(kuò)散速度小于電化學(xué)反應(yīng)速度而造成的極化。濃差極化一般認(rèn)為是秒級(jí)的。</span> 武漢格瑞斯新能源有限公司?，電池試驗(yàn)設(shè)備，專業(yè)技術(shù)打造，材料質(zhì)量過(guò)關(guān) , 服務(wù)質(zhì)量好。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="江蘇軟包電池實(shí)驗(yàn)線哪家好,電池" src="http://tyunfile.71360.com/UploadFile/whgrs888/637153146171025391/8637229.jpg"></div><p> <span style="font-size:16px;">鋰電池充電電路及保護(hù)電路方案設(shè)計(jì)</span> </p> <p> <br /> </p> <p> <span style="font-size:16px;">鋰電池特性</span> </p> <p> <br /> </p> <p> <br /> </p> <p> <br /> </p> <p> <span style="font-size:16px;">首先，芯片哥問(wèn)一句簡(jiǎn)單的問(wèn)題，為什么很多電池都是鋰電池?</span> </p> <p> <br /> </p> <p> <br /> </p> <p> <span style="font-size:16px;">鋰電池，工程師對(duì)它都不會(huì)感到陌生。在電子產(chǎn)品項(xiàng)目開(kāi)發(fā)的過(guò)程中，尤其是遇到電池供電的類別項(xiàng)目，工程師就會(huì)和鋰電池打交道。</span> </p> <p> <br /> </p> <p> <br /> </p> <p> <span style="font-size:16px;">這是因?yàn)殇囯姵氐碾娐诽匦詻Q定的。</span> </p> <p> <br /> </p> <p> <br /> </p> <p> <span style="font-size:16px;">眾所周知，鋰原子在化學(xué)元素周期表中排在第三位，包含3個(gè)質(zhì)子與3個(gè)電子，其中3個(gè)電子在鋰原子核內(nèi)部的分布對(duì)它的化學(xué)與物理特性起到?jīng)Q定性作用。</span> </p> <p> <br /> </p> <p> <span style="font-size:16px;">元素周期表</span> </p> <p> <br /> </p> <p> <br /> </p> <p> <span style="font-size:16px;">鋰原子核外層的3個(gè)電子，只有外層的1個(gè)電子是自由電子，另外2個(gè)電子不屬于自由電子，也就是不參與鋰原子的電子性能。</span> </p> <p> <br /> </p> <p> <br /> </p> <p> <span style="font-size:16px;">為什么會(huì)選用鋰元素作為電池的材料呢?</span> </p> <p> <br /> </p> <p> <br /> </p> <p> <span style="font-size:16px;">這是因?yàn)?，鋰原子雖然外層只有1個(gè)電子，但它的相對(duì)原子質(zhì)量卻只有7。換句話說(shuō)，在相同的質(zhì)量密度條件下，鋰原子所帶的電能是多的。</span> </p> <p> <br /> </p> <p> <br /> </p> <p> <span style="font-size:16px;">以鋁元素為例進(jìn)行對(duì)比，可以直觀的得出結(jié)論。</span> </p> <p> <br /> </p> <p> <br /> </p> <p> <span style="font-size:16px;">鋁元素，在元素周期表排在13位，外層自由移動(dòng)的電子數(shù)是3，相對(duì)原子質(zhì)量是27。</span> </p> <p> <span style="font-size:16px;">也就是如果用質(zhì)量為27的鋁元素制造電池，它的電能是3;</span> </p> <p> <br /> </p> <p> <br /> </p> <p> <span style="font-size:16px;">如果用相同質(zhì)量為27的鋰元素制造電池，它的電能是27*(1/7)，大約為3.86。</span> </p> <p> <br /> </p> <p> <br /> </p> <p> <span style="font-size:16px;">顯然，在電能方面，鋰元素的3.86是要超過(guò)鋁元素的3。這就是為什么鋰電池如此受歡迎的原因理論解釋。</span> </p> <p> <br /> </p> <span style="font-size:16px;"></span> <p> <br /> CS1006高槽壓電化學(xué)工作站，大值輸出槽壓可達(dá)到200V。江蘇科研電池容量測(cè)試儀銷售公司</p><p style="text-indent:25px">行星真空攪拌機(jī)，裝有低速攪拌部件和高速分散部件,低速攪拌部件采用行星齒輪傳動(dòng)。江蘇軟包電池實(shí)驗(yàn)線哪家好</p><p> <span style="font-size:18px;"><strong>燃料電池</strong></span> </p> <p> <span style="font-size:16px;">燃料電池是一種把燃料所具有的化學(xué)能直接轉(zhuǎn)換成電能的化學(xué)裝置，又稱電化學(xué)發(fā)電器。它是繼水力發(fā)電、熱能發(fā)電和原子能發(fā)電之后的第四種發(fā)電技術(shù)。由于燃料電池是通過(guò)電化學(xué)反應(yīng)把燃料的化學(xué)能中的吉布斯自由能部分轉(zhuǎn)換成電能，不受卡諾循環(huán)效應(yīng)的限制，因此效率高; 另外，燃料電池用燃料和氧氣作為原料；同時(shí)沒(méi)有機(jī)械傳動(dòng)部件，故沒(méi)有噪聲污染，排放出的有害氣體極少。由此可見(jiàn)，從節(jié)約能源和保護(hù)生態(tài)環(huán)境的角度來(lái)看，燃料電池是**有發(fā)展前途的發(fā)電技術(shù)</span><span style="font-size:16px;"></span> 江蘇軟包電池實(shí)驗(yàn)線哪家好</p><p style="text-indent:25px">武漢格瑞斯新能源有限公司是一家有著雄厚實(shí)力背景、信譽(yù)可靠、勵(lì)精圖治、展望未來(lái)、有夢(mèng)想有目標(biāo)，有組織有體系的公司，堅(jiān)持于帶領(lǐng)員工在未來(lái)的道路上大放光明，攜手共畫藍(lán)圖，在湖北省武漢市等地區(qū)的能源行業(yè)中積累了大批忠誠(chéng)的客戶粉絲源，也收獲了良好的用戶口碑，為公司的發(fā)展奠定的良好的行業(yè)基礎(chǔ)，也希望未來(lái)公司能成為*****，努力為行業(yè)領(lǐng)域的發(fā)展奉獻(xiàn)出自己的一份力量，我們相信精益求精的工作態(tài)度和不斷的完善創(chuàng)新理念以及自強(qiáng)不息，斗志昂揚(yáng)的的企業(yè)精神將**武漢格瑞斯和您一起攜手步入輝煌，共創(chuàng)佳績(jī)，一直以來(lái)，公司貫徹執(zhí)行科學(xué)管理、創(chuàng)新發(fā)展、誠(chéng)實(shí)守信的方針，員工精誠(chéng)努力，協(xié)同奮取，以品質(zhì)、服務(wù)來(lái)贏得市場(chǎng)，我們一直在路上！</p></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/3037469.html</p></div></div></div></div></div><div id="o2qr3oe" class="page-right twoColRt"><div id="393roa3" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="kwnpzls" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img 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