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  • 新能源汽車怎樣擺脫架在脖子上的刀

    • 原創
    • 2019-09-08 17:35
    • 來源:電車資源 朱曉文

    摘要:自燃”是一把刀,懸在了電動汽車的脖子上。電動汽車怎么樣才可以擺脫這把架在脖子上的刀呢?

    隨著動力電池方面技術的革新,電動汽車的續航也一直在穩步提升,但是影響消費者購買電動汽車的因素又怎么只有續航這一點呢。續航、安全、維修費用等等都是新能源汽車目前所存在的問題,同樣也是最初的問題。

    新能源汽車怎樣擺脫架在脖子上的刀

    自燃與安全安全,一直都是至關重要的,也是消費者目前最關心的。回看過去的幾個月,國內多個地區都發生了新能源汽車自燃現象,據電車資源了解到,其中有多部新能源汽車被燃燒殆盡,只剩下焦黑色的車架。

    “自燃”是一把刀,懸在了電動汽車的脖子上。電動汽車怎么樣才可以擺脫這把架在脖子上的刀呢?這就要講到電動汽車自燃的原因,或者說什么因素導致了電動汽車發生自燃。

    2019年動力電池安全性研究報告

    8月18日,清華大學電池安全實驗室發布《2019年動力電池安全性研究報告》(以下簡稱“《報告》”)。《報告》指出2019年至今,與動力電池相關的電動汽車自燃已達40余起,其中多數動力電池為方殼的三元鋰離子電池。經過對比分析,電動汽車出現的故障多在出廠的第二年夏天,在已查明起火原因的車輛中,41%的車輛處于行駛狀態、40%的車輛處于靜止狀態、19%的車輛處于充電狀態。

    新能源汽車怎樣擺脫架在脖子上的刀

    里程焦慮帶來高能量密度動力電池

    消費者對于新能源汽車的焦慮有幾大因素,其中之一就是續航問題。相比較于燃油車而言,新能源汽車的續航里程較短,且充電時間遠遠大于加油。各大車企為了解決續航問題,不斷地搭載能量密度高的動力電池或者增加動力電池組,而這些手段所帶來的正是不穩定性。

    目前的動力電池按照正極材料的不同大致能分為三元電池、錳酸鋰電池、磷酸鐵鋰電池,從發展前景來看,不管是國家政策,還是市場需求,三元電池似乎都占據先天性的優勢,也就是高能量密度,再從各大電池企業的研發投入來看,三元電池的占比也是要遠遠超過其它類型的鋰電池。

    以廠商的角度,增加動力電池的能量密度和電池組是最快捷且成本相對于較低的;以消費者角度,這種手段從增加了可行駛距離,在一定程度上是削減了焦慮。但是從安全性的角度,這種行為當然比不過提升充電技術及換電來的安全。

    動力電池失控原因

    高能量密度所帶來的并不是自燃,更多的是自燃之后產生的破壞力。導致動力電池失控有幾個原因:一是外力致損起火,電動汽車的動力電池一般安放在車輛底盤位置,位置偏低,行駛至路況偏差地區或者地面上有尖銳物體都有可能對動力電池造成破壞短路。二是內部原因,如熱失控,正負極短路,電池內部枝晶生長等等,涉及到了電池充放電的化學反應。

    新能源汽車怎樣擺脫架在脖子上的刀

    如何擺脫架在脖子上的刀

    如果想要擺脫這把刀,那么就需要消費者、政府與廠商三者共同負責。

    消費者:注意駕駛安全、車輛經常檢查、注意車輛保養與檢測等。

    電池與汽車廠商:從電池的制造、銷售、使用、退役、再利用、報廢、回收的整個生命周期設置監管,并且在出現差錯的情況下能夠及時反饋。這意味著不僅需要對整個電池組進行檢測,同時也必須隨時檢測電池單體的狀況。

    政府:對廠商嚴加監管,鼓勵電池廠商在加大技術改革。

    電車資源小結:

    看似繁榮的新能源汽車行業,實際上仍然處于初級發展階段。困擾新能源汽車行業發展的續航、安全、維修費用等問題就是新能源汽車行業最初的問題,這足以證明新能源汽車才處于迷茫階段。至于要怎樣擺脫架在脖子上的刀,還得看新能源汽車行業上中下游的共同努力。

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    “2019第四屆中國新能源物流車性能挑戰賽”比賽抽簽結束,快來了解一下抽簽結果。
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    動力電池行業 電池聯盟:9月動力電池裝車量4GWh 中航鋰電升至第三

    9月,我國動力電池產量共計7.6GWh,環比增長14.7%,同比增長9.7%。
    關鍵字: 動力電池 裝機量
    2019-10-15

    行業動態 EV早報|9月動力電池產量達7.6GWh;寧德時代前三季度凈利預增30%-50%;騰勢X官圖發布 將于廣州車展正式上市.....

    10月14日,中國汽車動力電池產業創新聯盟發布2019年9月新能源汽車電池產銷量及裝車量數據。9月,我國動力電池產量共計706GWh,環比增長14.7%,同比增長9.7%。

    行業動態 離挑戰賽和城配大會開啟僅剩1天 快來get這份參會指南

    2019年10月17-18日,“2019第四屆中國新能源物流車性能挑戰賽”及“2019年第三屆中國新能源物流車綠色城配大會”將在重慶盛大召開。
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    行業動態 新能源車展爽約:60多家企業參展 30多家倒閉了?計劃有變

    近期,網絡上流傳的一張短信截圖顯示,原定于10月30日至11月1日在上海新國際舉辦的上海新能源汽車自動化技術展,因行業不好致使部分車企計劃有變,將延期至2020年8月7日至9日舉行。
    關鍵字: 新能源汽車
    2019-10-15
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