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src="http://www.ex-cimer.com/event/company/images/code_1.jpg" width="130"><br />掃碼加入<br />和技術(shù)大咖面對(duì)面交流<br />海量資料庫(kù)查詢(xún)</li> </ul> </li> </ul> </div> </span> <span style="float:right; width:30px;margin-right:0px; text-align:right;"><a rel="nofollow">收藏</a></span> </div> <div id="jekbhyt" class="hAd4_Afinal20a_back">  <iframe id='a890e388' name='a890e388' src='https://ad.eepw.com.cn/www/delivery/afr.php?zoneid=88&cb=INSERT_RANDOM_NUMBER_HERE' frameborder='0' scrolling='no' width='660' height='60'><a target='_blank'><img src='https://ad.eepw.com.cn/www/delivery/avw.php?zoneid=88&cb=INSERT_RANDOM_NUMBER_HERE&n=a635e61e' border='0' alt='' /></a></iframe> </div> <div style="margin-top:28px;"></div> <div id="ukmzflv" class="content" id="contentDiv" style="position:relative;"> <div id="mezbdvu" class="ad_300x180_Afinal13_back">  <iframe id='a225770a' name='a225770a' src='https://ad.eepw.com.cn/www/delivery/afr.php?zoneid=87&cb=INSERT_RANDOM_NUMBER_HERE' frameborder='0' scrolling='no' width='300' height='200'><a target='_blank'><img src='https://ad.eepw.com.cn/www/delivery/avw.php?zoneid=87&cb=INSERT_RANDOM_NUMBER_HERE&n=a576c0a2' border='0' alt='' /></a></iframe> </div> <span id="contentlabels" style="font-size:14px;"><p style="text-indent: 2em; text-align: left;">在電動(dòng)汽車(chē) (EV) 和蓄電池應(yīng)用中，由多個(gè)鋰離子 (li-ion) 電池構(gòu)成的電池組會(huì)發(fā)生熱擊穿，從而帶來(lái)安全威脅，甚至可能造成嚴(yán)重后果。當(dāng)然，用戶(hù)通常會(huì)對(duì)無(wú)視這個(gè)問(wèn)題，但設(shè)計(jì)者完全知道，在串聯(lián)和并聯(lián)了數(shù)百個(gè)鋰離子電池單元的情況下，其中一個(gè)電池單元發(fā)生故障就能造成快速溫升，并排放氣體和固體微粒。</p>本文引用地址：<a href="http://www.ex-cimer.com/article/202304/446089.htm">http://www.ex-cimer.com/article/202304/446089.htm</a><p style="text-indent: 2em; text-align: left;">在電動(dòng)汽車(chē) (EV) 和蓄電池應(yīng)用中，由多個(gè)鋰離子 (li-ion) 電池構(gòu)成的電池組會(huì)發(fā)生熱擊穿，從而帶來(lái)安全威脅，甚至可能造成嚴(yán)重后果。當(dāng)然，用戶(hù)通常會(huì)對(duì)無(wú)視這個(gè)問(wèn)題，但設(shè)計(jì)者完全知道，在串聯(lián)和并聯(lián)了數(shù)百個(gè)鋰離子電池單元的情況下，其中一個(gè)電池單元發(fā)生故障就能造成快速溫升，并排放氣體和固體微粒。<br/>這種形式的故障可能會(huì)蔓延到其他電池單元。出現(xiàn)更多這樣的反應(yīng)，就會(huì)產(chǎn)生更多的熱量和氣體，最終影響到整個(gè)電池系統(tǒng)并發(fā)生熱擊穿。</p><p style="text-indent: 2em; text-align: left;">雖然我們有防止熱擊穿發(fā)生的措施，但是一旦發(fā)生熱擊穿，我們還是要檢測(cè)熱擊穿情況，這點(diǎn)至關(guān)重要。為此，Honeywell Sensing and Productivity Solutions 開(kāi)發(fā)出 BAS 系列汽車(chē)級(jí)電池氣溶膠傳感器。這種傳感器利用光散射原理來(lái)檢測(cè)并報(bào)告<a class="contentlabel" href="http://www.ex-cimer.com/news/listbylabel/label/鋰離子電池組"><em>鋰離子電池組</em></a>的熱擊穿事件。該系列傳感器利用光散射來(lái)檢測(cè)是否存在諸如煙霧、液體和碎屑等氣溶膠及其濃度，這些是熱擊穿事件發(fā)生的早期指標(biāo)。<br/>光散射的過(guò)程包括照亮一股空氣。被照射氣體內(nèi)部的顆粒會(huì)散射光線(xiàn)，然后由光傳感器測(cè)量，產(chǎn)生一個(gè)與顆粒密度成比例的電信號(hào)。</p><p style="text-indent: 2em; text-align: left;">BAS 系列傳感器測(cè)量濃度在 200 μg/m3 到 10000 μg/m3 范圍內(nèi)的氣溶膠，并發(fā)出報(bào)告。這種傳感器具有工廠設(shè)定的熱擊穿報(bào)警閾值，具體為 5000μg/m3 且響應(yīng)時(shí)間小于 1 秒。連續(xù)工作模式下的控制、數(shù)據(jù)傳輸和報(bào)警是通過(guò)控制器區(qū)域網(wǎng)絡(luò) (CAN) 通信協(xié)議進(jìn)行的，該協(xié)議已廣泛用于車(chē)輛環(huán)境。CAN 接口的運(yùn)行波特率為 500 kbps。<br/>傳感器實(shí)例<br/>Honeywell Sensing and Productivity Solutions 在其 BAS 系列中提供了兩款傳感器，即 BAS6C-X00 和 BAS6C-H00 傳感器（圖 1）。這兩款器件的外形相同，具體尺寸為長(zhǎng) 2.6 in. (66 mm)、深 1.42 in. (36 mm) 和高 1.46 in. (37 mm)。</p><p style="text-align:center"><img src="http://editerupload.eepw.com.cn/202304/1682649856905022.jpg" width="400" height="389" title="通過(guò)監(jiān)控鋰離子電池組來(lái)檢測(cè)電池?zé)釗舸┦录? alt="通過(guò)監(jiān)控鋰離子電池組來(lái)檢測(cè)電池?zé)釗舸┦录?/></p><p><br/>圖 1：Honeywell Sensing and Productivity Solutions 提供的兩款外形相同的電池氣溶膠傳感器：BASC6X-X00 和 BAS6C-H00。BAS6C-X00 是媒介控制單元 1 (MCU1) 版本，而 BAS6C-H00 是較新的媒體控制單元 2 (MCU2) 版本。（圖片來(lái)源：Honeywell Sensing and Productivity）</p><p></p><p>BAS6C-X00 是媒介控制單元 1 (MCU1) 版本，而 BAS6C-H00 是較新的媒體控制單元 2 (MCU2) 版本。<br/>根據(jù)電池管理系統(tǒng) (BMS) 設(shè)置的“請(qǐng)求”輸入線(xiàn)路的狀態(tài)，BAS 傳感器在兩種工作模式中的任一種模式下發(fā)揮作用。當(dāng)“請(qǐng)求”線(xiàn)路保持低電平（低于 0.5 V）時(shí)，ECO 模式是經(jīng)濟(jì)模式，可最大限度地減少功耗。傳感器被喚醒并工作 200 ms，然后在接下來(lái)的 12,000 ms 內(nèi)進(jìn)入休眠狀態(tài)以節(jié)省電力。通過(guò)禁用 CAN 總線(xiàn)可以更多地節(jié)省電力。如果發(fā)生閾值事件，即顆粒物濃度超過(guò) 5,000 mg/m3，傳感器會(huì)向 BMS 發(fā)送一個(gè)喚醒信號(hào)，啟動(dòng)全電池系統(tǒng)檢查。<br/>在連續(xù)工作模式下，當(dāng) BMS 將“請(qǐng)求”線(xiàn)路設(shè)置為高電平（8 V 至 16 V 之間）時(shí)，傳感器不斷監(jiān)測(cè)并使用 CAN 總線(xiàn)的 8 字節(jié)信息向 BMS 報(bào)告氣溶膠濃度。<br/>這兩款傳感器的標(biāo)稱(chēng)工作電壓為 12 V，范圍在 8 V 到 16 V 之間。電源電流取決于工作模式。在 ECO 模式下小于 0.5 mA，在連續(xù)模式下小于 30 mA。<br/>只要在中空的檢測(cè)腔兩側(cè)有 10 cm 的間隙，就能以任何方向?qū)鞲衅靼惭b在封閉的電池組內(nèi)（圖 2）。</p><p></p><p><img src="http://editerupload.eepw.com.cn/202304/1682649857902134.jpg" width="557" height="142" title="通過(guò)監(jiān)控鋰離子電池組來(lái)檢測(cè)電池?zé)釗舸┦录? alt="通過(guò)監(jiān)控鋰離子電池組來(lái)檢測(cè)電池?zé)釗舸┦录?/></p><p><br/>圖 2：可以將 BAS 傳感器安裝在電池組內(nèi)的任何位置。在任何情況下，都不能阻塞電池組的排氣閥。（圖片來(lái)源：Honeywell Sensing and Productivity）</p><p></p><p>接口連接器是一個(gè)六針的長(zhǎng)方形插口，其具體引腳分布見(jiàn)圖 3。</p><p></p><p><img src="http://editerupload.eepw.com.cn/202304/1682649857158263.jpg" width="455" height="386" title="通過(guò)監(jiān)控鋰離子電池組來(lái)檢測(cè)電池?zé)釗舸┦录? alt="通過(guò)監(jiān)控鋰離子電池組來(lái)檢測(cè)電池?zé)釗舸┦录?/></p><p><br/>圖 3：BAS 系列傳感器的引腳布局包括電源、接地、請(qǐng)求和喚醒信號(hào)，以及差分 CAN 總線(xiàn)信號(hào)。（圖片來(lái)源：Honeywell Sensing and Productivity）</p><p></p><p>BAS 系列電池氣溶膠傳感器的配套插頭連接器采用 TE Connectivity AMP Connectors 的 175507-2 連接器。</p><p>結(jié)束語(yǔ)</p><p>使用 Honeywell Sensing and Productivity Solutions 的 BAS 電池氣溶膠傳感器對(duì)<a class="contentlabel" href="http://www.ex-cimer.com/news/listbylabel/label/鋰離子電池組"><em>鋰離子電池組</em></a>進(jìn)行早期熱擊穿檢測(cè)，就有可能防止人身傷亡和財(cái)產(chǎn)損壞。使用這類(lèi)傳感器還有助于符合國(guó)際建議和法規(guī)，因其設(shè)計(jì)符合最高的質(zhì)量和可靠性標(biāo)準(zhǔn)。</p><p>免責(zé)聲明：本文為轉(zhuǎn)載文章，轉(zhuǎn)載此文目的在于傳遞更多信息，版權(quán)歸原作者所有。本文所用視頻、圖片、文字如涉及作品版權(quán)問(wèn)題，請(qǐng)聯(lián)系小編進(jìn)行處理。</p></span>  <div class="louarqa" id="coverDiv" class="article_reg" style="width:100%;overflow:hidden;display:none;z-index:10;position:absolute;left:0;background:#fff;"> <center> <img src="https://webstorage.eepw.com.cn/images/display/reg.jpg" border="0" usemap="#Map" /> <map name="Map" id="Map"> <area shape="rect" coords="133,235,319,253" target="_blank" /> <area shape="rect" coords="132,315,319,335" /> </map> </center> </div>  <span id="jfwctdc" class="hAd8"> <br></span>   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