一小米SU7行驶里程达26.5万公里电池健康度仅降5.5%

智能汽车02-02

【CNMO科技消息】2月2日，微博博主“杰克森的落日飞车”在社交媒体上分享了一段视频。视频中，他找到一辆可能是“全国里程数最高”的小米SU7，并对该车进行了一系列测试。视频中，这辆小米SU7行驶日程已有一年半，行驶里程高达26.5万公里，电池健康度还剩下高达94.5%。小米SU7这辆小米SU7的电池能够持久耐用离不开该车型搭载的热管理与安全技术。据CNMO了解，SU7系列搭载的第二代无热扩散技术（...

网页链接

免责声明：本文观点仅代表作者个人观点，不构成本平台的投资建议，本平台不对文章信息准确性、完整性和及时性做出任何保证，亦不对因使用或信赖文章信息引发的任何损失承担责任。

精彩评论

我们需要你的真知灼见来填补这片空白

发表看法

{"i18n":{"language":"zh_CN"},"isChannel":false,"data":{"share":"https://www.laohu8.com/m/news/2608485027?lang=zh_CN&edition=full","thumbnail":"","is_english":false,"pubTime":"2026-02-02 18:01","share_image_url":"https://static.laohu8.com/9a95c1376e76363c1401fee7d3717173","id":"2608485027","market":"hk","top_or_hot":-1,"title":"一小米SU7行驶里程达26.5万公里 电池健康度仅降5.5%","media":"智能汽车","content":"<div>\n<p>【CNMO科技消息】2月2日，微博博主“杰克森的落日飞车”在社交媒体上分享了一段视频。视频中，他找到一辆可能是“全国里程数最高”的小米SU7，并对该车进行了一系列测试。视频中，这辆小米SU7行驶日程已有一年半，行驶里程高达26.5万公里，电池健康度还剩下高达94.5%。小米SU7这辆小米SU7的电池能够持久耐用离不开该车型搭载的热管理与安全技术。据CNMO了解，SU7系列搭载的第二代无热扩散技术（...</p>\n\n<a href=\"http://gu.qq.com/resources/shy/news/detail-v2/index.html#/?id=nesSN20260202182838a6c9f439&s=b\">网页链接</a>\n\n</div>\n","source":"tencent","html":"<!DOCTYPE html>\n<html>\n<head>\n<meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\" />\n<meta name=\"viewport\" content=\"width=device-width,initial-scale=1.0,minimum-scale=1.0,maximum-scale=1.0,user-scalable=no\"/>\n<meta name=\"format-detection\" content=\"telephone=no,email=no,address=no\" />\n<title>一小米SU7行驶里程达26.5万公里 电池健康度仅降5.5%</title>\n<style type=\"text/css\">\na,abbr,acronym,address,applet,article,aside,audio,b,big,blockquote,body,canvas,caption,center,cite,code,dd,del,details,dfn,div,dl,dt,\nem,embed,fieldset,figcaption,figure,footer,form,h1,h2,h3,h4,h5,h6,header,hgroup,html,i,iframe,img,ins,kbd,label,legend,li,mark,menu,nav,\nobject,ol,output,p,pre,q,ruby,s,samp,section,small,span,strike,strong,sub,summary,sup,table,tbody,td,tfoot,th,thead,time,tr,tt,u,ul,var,video{ font:inherit;margin:0;padding:0;vertical-align:baseline;border:0 }\nbody{ font-size:16px; line-height:1.5; color:#999; background:transparent; }\n.wrapper{ overflow:hidden;word-break:break-all;padding:10px; }\nh1,h2{ font-weight:normal; line-height:1.35; margin-bottom:.6em; }\nh3,h4,h5,h6{ line-height:1.35; margin-bottom:1em; }\nh1{ font-size:24px; }\nh2{ font-size:20px; }\nh3{ font-size:18px; }\nh4{ font-size:16px; }\nh5{ font-size:14px; }\nh6{ font-size:12px; }\np,ul,ol,blockquote,dl,table{ margin:1.2em 0; }\nul,ol{ margin-left:2em; }\nul{ list-style:disc; }\nol{ list-style:decimal; }\nli,li p{ margin:10px 0;}\nimg{ max-width:100%;display:block;margin:0 auto 1em; }\nblockquote{ color:#B5B2B1; border-left:3px solid #aaa; padding:1em; }\nstrong,b{font-weight:bold;}\nem,i{font-style:italic;}\ntable{ width:100%;border-collapse:collapse;border-spacing:1px;margin:1em 0;font-size:.9em; }\nth,td{ padding:5px;text-align:left;border:1px solid #aaa; }\nth{ font-weight:bold;background:#5d5d5d; }\n.symbol-link{font-weight:bold;}\n/* header{ border-bottom:1px solid #494756; } */\n.title{ margin:0 0 8px;line-height:1.3;color:#ddd; }\n.meta {color:#5e5c6d;font-size:13px;margin:0 0 .5em; }\na{text-decoration:none; color:#2a4b87;}\n.meta .head { display: inline-block; overflow: hidden}\n.head .h-thumb { width: 30px; height: 30px; margin: 0; padding: 0; border-radius: 50%; float: left;}\n.head .h-content { margin: 0; padding: 0 0 0 9px; float: left;}\n.head .h-name {font-size: 13px; color: #eee; margin: 0;}\n.head .h-time {font-size: 11px; color: #7E829C; margin: 0;line-height: 11px;}\n.small {font-size: 12.5px; display: inline-block; transform: scale(0.9); -webkit-transform: scale(0.9); transform-origin: left; -webkit-transform-origin: left;}\n.smaller {font-size: 12.5px; display: inline-block; transform: scale(0.8); -webkit-transform: scale(0.8); transform-origin: left; -webkit-transform-origin: left;}\n.bt-text {font-size: 12px;margin: 1.5em 0 0 0}\n.bt-text p {margin: 0}\n</style>\n</head>\n<body>\n<div class=\"wrapper\">\n<header>\n<h2 class=\"title\">\n一小米SU7行驶里程达26.5万公里 电池健康度仅降5.5%\n</h2>\n\n<h4 class=\"meta\">\n\n\n2026-02-02 18:01 北京时间&nbsp;&nbsp;&nbsp;<a href=http://gu.qq.com/resources/shy/news/detail-v2/index.html#/?id=nesSN20260202182838a6c9f439&s=b><strong>智能汽车</strong></a>\n\n\n</h4>\n\n</header>\n<article>\n<div>\n<p>【CNMO科技消息】2月2日，微博博主“杰克森的落日飞车”在社交媒体上分享了一段视频。视频中，他找到一辆可能是“全国里程数最高”的小米SU7，并对该车进行了一系列测试。视频中，这辆小米SU7行驶日程已有一年半，行驶里程高达26.5万公里，电池健康度还剩下高达94.5%。小米SU7这辆小米SU7的电池能够持久耐用离不开该车型搭载的热管理与安全技术。据CNMO了解，SU7系列搭载的第二代无热扩散技术（...</p>\n\n<a href=\"http://gu.qq.com/resources/shy/news/detail-v2/index.html#/?id=nesSN20260202182838a6c9f439&s=b\">网页链接</a>\n\n</div>\n\n\n</article>\n</div>\n</body>\n</html>\n","isBrief":false,"type":0,"news_type":1,"symbol":"LU1868837565.USD","symbol_name":"CT (LUX) I GLOBAL EMERGING MARKET EQUITIES \"1\" (USD) ACC","start_time":0,"source_url":"http://gu.qq.com/resources/shy/news/detail-v2/index.html#/?id=nesSN20260202182838a6c9f439&s=b","article_id":"2608485027","we_media_id":null,"thumbnails":[],"rights":{"source":"tencent","url":"http://gu.qq.com/resources/shy/news/detail-v2/index.html#/?id=nesSN20260202182838a6c9f439&s=b","rn_cache_url":null,"customStyle":"body{padding-top:10px;}#news_title{font-weight:bold;#titleStyle#;}#news_description span{font-size:12px;#descriptionStyle#;}.footer-note{#statement#}","selectors":".mod-LoadTzbdNews, body","filters":".relate-stock, .hot-list, .recom-box, .wx-sou","directOrigin":true},"url":"https://stock-news.laohu8.com/highlight/detail?id=2608485027","pubTimestamp":1770026460,"columns":[],"sourceInfo":{"source_id":"tencent","name":"腾讯"},"weMediaInfo":null,"summary":"视频中，他找到一辆可能是“全国里程数最高”的小米SU7，并对该车进行了一系列测试。视频中，这辆小米SU7行驶日程已有一年半，行驶里程高达26.5万公里，电池健康度还剩下高达94.5%。小米SU7这辆小米SU7的电池能够持久耐用离不开该车型搭载的热管理与安全技术。工艺制造方面，小米SU7系列搭载的麒麟电池采用了PPB级的制造工艺，将电芯的单体缺陷率控制在了极致的水平。","collect":0,"end_time":0,"defaultTopTitle":"qq.com","property":[],"viewcount":null,"language":"zh","relate_stocks":{"81810":"小米集团-WR","LU1868837565.USD":"CT (LUX) I GLOBAL EMERGING MARKET EQUITIES \"1\" (USD) ACC","LU2476274308.USD":"ALLIANZ CHINA FUTURE TECHNOLOGIES \"AT\" (USD) ACC","BK1575":"同股不同权","LU0164865239.USD":"HSBC GIF CHINESE EQUITY \"AC\" (USD) ACC","LU0918141887.USD":"安联亚洲实际收益股票基金","LU0084288322.USD":"Natixis Asia Equity RD USD","LU0348814723.USD":"ALLIANZ TOTAL RETURN ASIAN EQUITY \"A\" (USD) INC  NC","LU0708995583.HKD":"TEMPLETON CHINA \"A\" (HKD) ACC","LU0143863784.USD":"CT (LUX) I GLOBAL EMERGING MARKET EQUITIES\"DU\" (USD) ACC","XIACY":"小米集团ADR","BK1610":"ETF&股票定投概念","LU1813983027.USD":"MANULIFE GF DRAGON GROWTH \"AA\" (USD) INC","LU0327786744.USD":"Janus Henderson Horizon China Opportunities A2 USD","LU0345775950.USD":"NINETY ONE GSF ASIAN EQUITY \"A\" (USD) ACC","LU2399975544.HKD":"ALLIANZ ALL CHINA EQUITY \"AT\" (HKD) ACC","LU1323998911.USD":"BGF ASIAN MULTI-ASSET INCOME \"A\" (USD) ACC","LU0531970944.HKD":"HSBC GIF BRIC EQUITY \"AC\" (HKD) ACC","LU0164872284.USD":"HSBC GIF GLOBAL EMERGING MARKETS EQUITY \"A\" (USD) ACC","LU0823426480.USD":"法巴中国股票经典Dis","LU0348827113.USD":"ALLIANZ RCM CHINA \"AT\" ACC","LU0164880469.USD":"HSBC GIF HONG KONG EQUITY \"AC\" ACC","LU1880383366.USD":"东方汇理中国股票基金 A2 (C)","LU0143863198.USD":"CT (LUX) I GLOBAL EMERGING MARKET EQUITIES\"AU\" (USD) ACC","LU0054450605.USD":"HSBC GIF GLOBAL EMERGING MARKTS EQ \"AD\" INC","BK1521":"挪威政府全球养老基金持仓","LU0359202008.SGD":"Blackrock China Fund A2 SGD-H","LU0456846285.SGD":"JPMorgan Funds - Greater China A (acc) SGD","LU0540923850.HKD":"ALLIANZ HONG KONG EQUITY \"A\" (HKD) INC","SG9999002463.SGD":"LionGlobal China Growth SGD","LU1880383440.USD":"AMUNDI FUNDS CHINA EQUITY \"A2\" (USD) INC","LU1808992512.USD":"AB ALL CHINA EQUITY PORTFOLIO \"A\" (USD) ACC","IE00B3M56506.USD":"NEUBERGER BERMAN EMERGING MARKETS EQUITY \"A\" (USD) ACC","BK1523":"武汉本地概念股","LU0634319403.HKD":"ALLIANZ HONG KONG EQUITY \"AT\" (HKD) ACC","LU2097828557.USD":"AZ EQUITY CHINA \"A\" (USD) ACC","LU0531971595.HKD":"HSBC GIF CHINESE EQUITY \"AD\" (HKD) INC","LU0052750758.USD":"富兰克林中国基金A Acc","LU2097828631.EUR":"AZ EQUITY CHINA \"A\" (EUR) ACC","BK1607":"新IT概念","LU2778985437.USD":"ALLIANZ CHINA FUTURE TECHNOLOGIES \"A\" (USD) INC","LU0611395673.USD":"NINETY ONE GSF EMERGING MARKETS EQUITY \"A\" (USD) ACC","HK0000165453.HKD":"华夏精选大中华科技基金 A类港币","LU2097828714.EUR":"AZ EQUITY CHINA \"BAZ\" (EUR) ACC","LU0823040885.USD":"东方汇理新兴市场焦点股票基金","BK1589":"北水核心资产","LU0561508036.HKD":"ALLIANZ CHINA EQUITY \"A\" (HKD) INC","LU2152927971.USD":"NORDEA 1 ASIAN STARS EQUITY \"BP\" (USD) ACC","LU2097828805.USD":"AZ EQUITY CHINA \"A-AZ\" (USD) ACC","LU0039217434.USD":"HSBC GIF CHINESE EQUITY \"AD\" INC","LU0345776255.USD":"NINETY ONE GSF ASIAN EQUITY \"A\" (USD) INC","LU0307460666.USD":"EASTSPRING INVESTMENTS CHINA EQUITY \"A\" ACC","LU2097828474.EUR":"AZ EQUITY CHINA \"A\" (EUR) ACC A","LU0588546209.SGD":"Eastspring Investments - China Equity Fund AS SGD","SG9999003461.SGD":"United Asia Pacific Infrastructure SGD","LU1188198961.HKD":"SCHRODER ISF CHINA OPPORTUNITIES \"A\" (HKD) INC QV","LU0449515922.USD":"HSBC GIF GLOBAL EMERGING MARKETS EQUITY \"PC\" (USD)ACC","LU0359201612.USD":"贝莱德中国基金A2","IE0034224299.USD":"PINEBRIDGE ASIA EX JAPAN EQUITY \"A\" (USD) ACC","LU1720050803.USD":"安联全方位中国股票基金","LU0797268264.HKD":"ALLIANZ TOTAL RETURN ASIAN EQUITY \"AT\" (HKD) ACC","LU0605514214.HKD":"FIDELITY CHINA CONSUMER \"A\" (HKD) ACC","01810":"小米集团-W","LU0456827905.SGD":"JPMorgan Funds - China A (acc) SGD","LU0214875030.USD":"HSBC GIF BRIC EQUITY \"M2C\" (USD) ACC","LU0231483743.USD":"abrdn SICAV I - ALL CHINA SUSTAINABLE EQUITY \"A\" (USD) ACC","LU0149721374.USD":"HSBC GIF HONG KONG EQUITY \"AD\" INC","LU1719994722.HKD":"NINETY ONE GSF ALL CHINA EQUITY \"A\" (HKD) ACC","BK1618":"Manus概念股","SG9999001093.SGD":"United Greater China Fund A Acc SGD","LU2087589342.USD":"BGF ASIAN MULTI-ASSET INCOME \"A6\" (USD) INC","LU1770034418.SGD":"ALL CHINA EQUITY \"A\" (SGDHDG) ACC","LU0823041008.USD":"AMUNDI FUNDS EMERGING WORLD EQUITY \"A2\" (USD) ACC","LU2039709279.SGD":"MANULIFE GF DRAGON GROWTH \"AA\" (SGDHDG) INC","LU0823038988.USD":"AMUNDI FUNDS ASIA EQUITY FOCUS  \"A2\" (USD) ACC","LU0463099449.HKD":"SCHRODER ISF CHINA OPPORTUNITIES \"A\" (HKD) ACC","LU1282648689.USD":"ALLIANZ TOTAL RETURN ASIAN EQUITY \"AMG\" (USD) INC","BK1615":"港股-互联网","LU0348816934.USD":"ALLIANZ TOTAL RETURN ASIAN EQUITY \"AT\" (USD)","LU0359201885.HKD":"BGF CHINA \"A2\" (HKD) ACC","LU0823039010.USD":"AMUNDI FUNDS ASIA EQUITY FOCUS  \"A2\" (USD) INC","HXXD.SI":"Xiaomi HK SDR 2to1","LU0211977185.USD":"EASTSPRING INVESTMENTS GREATER CHINA EQUITY \"A\" ACC","BK1193":"电脑硬件、储存设备及电脑周边","LU0117841782.USD":"JPM GREATER CHINA \"A\" (USD) INC","LU0593848301.USD":"未来资产亚洲卓越消费股票基金A","LU1868838027.USD":"CT (LUX) I GLOBAL EMERGING MARKET EQUITIES \"8\" (USD) ACC","LU0499858602.USD":"NINETY ONE GSF ASIA PACIFIC EQUITY OPPORTUNITIES \"A\" (USD) ACC","LU0235996351.USD":"UBS (LUX) KEY SELECTION SICAV - ASIAN EQUITY (USD) \"P\" (USD) ACC","LU0417516738.SGD":"Allianz Hong Kong Equity AT Acc SGD","IE0032431581.USD":"PINEBRIDGE GREATER CHINA EQUITY \"A\" (USD) ACC","LU2226246903.HKD":"ALLIANZ TOTAL RETURN ASIAN EQUITY \"AT4\" (HKD) ACC","LU0348735423.USD":"ALLIANZ HONG KONG EQUITY \"A\" (USD) INC","LU0244354667.USD":"SCHRODER ISF CHINA OPPORTUNITIES \"A\" ACC","LU1956131251.USD":"BNP PARIBAS SUSTAINABLE ASIA EX-JAPAN EQUITY \"C\"MD (USD) INC","BK1502":"双十一","LU1251922891.USD":"NINETY ONE GSF ALL CHINA EQUITY \"A\" (USD) ACC","LU0594300419.USD":"富达中国消费基金A","LU1770036033.HKD":"NINETY ONE GSF ASIAN EQUITY \"A\" (HKD) ACC","LU0650527681.SGD":"Fidelity China Consumer A-SGD","LU1961090484.USD":"ALLIANZ ALL CHINA EQUITY \"A\" (USD) INC","LU0823413587.USD":"BNP PARIBAS EMERGING EQUITY \"C\" (USD) ACC","LU1303224171.USD":"NINETY ONE GSF ALL CHINA EQUITY \"A\" (USD) INC","LU2257852520.SGD":"JPMorgan Funds - Asia Growth A (acc) SGD","LU0348825331.USD":"ALLIANZ CHINA EQUITY \"A\" (USD) INC","LU1105468828.SGD":"Allianz Total Return Asian Equity AM DIS H2-SGD","LU0871576103.HKD":"HSBC GIF CHINESE EQUITY \"AC\" (HKD) ACC","LU0320764599.SGD":"FTIF - Templeton China A Acc SGD","LU0918141705.HKD":"ALLIANZ TOTAL RETURN ASIAN EQUITY \"AM\" (HKD) INC","LU1794554557.SGD":"Allianz All China Equity AT Acc H2-SGD","LU0499858438.USD":"NINETY ONE GSF ASIA PACIFIC EQUITY OPPORTUNITIES \"A\" (USD) INC","LU0169518387.USD":"JPM ASIA EQUITY \"A\" ACC","LU2476274720.SGD":"ALLIANZ CHINA FUTURE TECHNOLOGIES \"AT\" (SGDHDG) ACC","LU0675040207.SGD":"JPM ASIA PACIFIC EQUITY \"A\" (SGD) ACC","LU0823413660.USD":"BNP PARIBAS EMERGING EQUITY \"C\" (USD) INC","LU0441854154.USD":"JPM ASIA PACIFIC EQUITY \"A\" (USD) ACC","LU0823397103.USD":"BNP PARIBAS SUSTAINABLE ASIA EX-JAPAN EQUITY \"C\" (USD) ACC","LU1328277881.USD":"MANULIFE GF DRAGON GROWTH FUND \"AA\" (USD) INC","LU0823426308.USD":"法巴中国股票基金","LU0823397285.USD":"BNP PARIBAS SUSTAINABLE ASIA EX-JAPAN EQUITY \"C\" (USD) INC","LU1981816686.USD":"EASTSPRING INV ASIAN MULTI FACTOR EQUITY \"A\" (USD) ACC","BK1506":"5G概念","LU0314109678.HKD":"MANULIFE GF DRAGON GROWTH \"AA\" (HKD) INC","LU0051755006.USD":"摩根大通中国A (dist)","LU1023057109.AUD":"BGF CHINA \"A2\" (AUDHDG) ACC","LU0326950275.SGD":"Schroder ISF China Opportunities A Acc SGD-H","LU1481107354.HKD":"HSBC GIF HONG KONG EQUITY \"AD\" (HKD) INC","LU0572944931.SGD":"Janus Henderson Horizon China Opportunities A2 SGD","LU0210526637.USD":"JPM CHINA \"A\" (USD) ACC","LU0254981946.USD":"HSBC GIF BRIC MARKETS EQUITY \"AC\" (USD) ACC","LU0594300179.USD":"FIDELITY CHINA CONSUMER \"A\" (USD) ACC","LU0449509016.USD":"HSBC GIF BRIC EQUITY \"AC\" (USD) ACC","LU0700851271.USD":"NINETY ONE GSF EMERGING MARKETS MULTI-ASSET \"A\" (USD) ACC","LU0417516902.SGD":"Allianz China Equity Cl AT Acc SGD"},"translate_title":"Xiaomi SU7 has a mileage of 265,000 kilometers, and the battery health only drops by 5.5%","themeId":null,"isJumpTheme":false,"ttsUrl":null,"symbols_score_info":{"81810":0.6,"01810":1.91,"XIACY":1.91,"HXXD.SI":0.6,"MIUmain":0.6},"content_text":"【CNMO科技消息】2月2日，微博博主“杰克森的落日飞车”在社交媒体上分享了一段视频。视频中，他找到一辆可能是“全国里程数最高”的小米SU7，并对该车进行了一系列测试。视频中，这辆小米SU7行驶日程已有一年半，行驶里程高达26.5万公里，电池健康度还剩下高达94.5%。小米SU7这辆小米SU7的电池能够持久耐用离不开该车型搭载的热管理与安全技术。据CNMO了解，SU7系列搭载的第二代无热扩散技术（NP2.0）通过创新的“热电分离”设计，将电芯发生故障时产生的高温烟气泄压通道与电池的高压电路在物理空间上完全隔离。这意味着，即便单个电芯出现异常，高温烟气也会被导向安全区域排出，而不会直接冲击和损伤周围的电路及其他电芯，从而将问题严格控制在极小范围内，避免了因热失控导致整个电池包性能的永久性、大规模衰减。工艺制造方面，小米SU7系列搭载的麒麟电池采用了PPB级（十亿分之一）的制造工艺，将电芯的单体缺陷率控制在了极致的水平。这种生产标准从根源上极大消除了电芯内部可能存在的毛刺、杂质等微小瑕疵，避免电池加速老化。此外，在安全方面，小米SU7系列的电池包还具备最高等级的防水能力（IPX8和IPX9K），保证即使在深水或高压水洗条件下，其密封性和安全性依然可靠，防止因进水引发的内部短路或腐蚀。","kind":"news","is_publish_news":true,"is_publish_highlight":false,"is_publish_live":false,"is_publish_wemedia":null,"editions":null,"column":"","sentiment":"0","news_tag":"","news_rank":0,"symbols":[],"gpt_button":0,"need_auth":false,"code":"91000000","status":"200"},"commentList":[],"isCommentEnd":true,"newsSizeData":{"likeSize":1,"commentSize":0,"repostSize":0,"favoriteSize":0,"likeStatus":false,"favoriteStatus":false},"APP":{"userAgent":"Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)","isDev":false,"isTTM":false,"tenantId":"TBCN","deviceId":"web-server-community-laohu8-v3","version":"4.37.0","shortVersion":"4.37.0","platform":"web","vendor":"web","appName":"laohu8","isIOS":false,"isAndroid":false,"isTiger":false,"isTHS":false,"isWeiXin":false,"isWeiXinMini":false,"isWeiBo":false,"isQQ":false,"isBaiduSwan":false,"isBaiduBox":false,"isDingTalk":false,"isToutiao":false,"isOnePlus":false,"isHuaWei":false,"isXiaomi":false,"isXiaomiWebView":false,"isOppo":false,"isVivo":false,"isSamsung":false,"isMobile":false},"href":"/m/news/2608485027","isCrawlerRequest":true}

一小米SU7行驶里程达26.5万公里 电池健康度仅降5.5%

精彩评论

一小米SU7行驶里程达26.5万公里电池健康度仅降5.5%