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  • 熱失穩研究取得新進展,比克電池深攻高鎳811

    • 2019-09-05 10:29
    • 來源:電車資源

    摘要:近日,比克動力電池電芯研究院院長林建博士進行了鋰電安全相關的主題分享,并發布了在熱失穩領域的最新研究進展,再次印證了比克電池作為國內唯一整車通過熱失穩測試的電池供應商對高鎳811電芯品質的更高追求。

    近日,深圳市比克動力電池有限公司電芯研究院院長林建博士受邀出席鋰電行業技術創新與應用發展高峰論壇,在會上進行了鋰電安全相關的主題分享,并發布了比克在熱失穩領域的最新研究進展,再次印證了比克電池作為國內唯一整車通過熱失穩測試的電池供應商對高鎳811電芯品質的更高追求。

    近年來,隨著新能源汽車市場的發展,里程焦慮在行業發展中體現的越發明顯,高鎳811憑借能量密度更高以及鈷含量更低的優勢,同時滿足了市場上對于動力電池增加續航和降低成本的雙重要求,成為解決里程焦慮的趨勢之選。然而高鎳材料體系的環境適應性,決定了其在電芯鎳含量提高的同時其循環壽命和穩定性會受到影響。比克作為國內最早實現高鎳811圓柱電芯量產的企業,始終專注于提高鋰電池安全性能,在熱失穩問題的控制上達到業界前沿水平。

    熱失穩研究取得新進展,比克電池深攻高鎳811

    在高鎳811電芯的研發生產中,比克電池采用了特定的化學體系設計及獨特的結構設計,從整體結構的角度降低危險系數,從結構設計、頂部安全閥、正負極材料、生產流程等各方面嚴格把控電芯品質。

    安全穩定的結構設計是保證電芯熱穩定的基礎,比克高鎳811電芯采用釋壓均勻的對稱式結構、避免熱失穩的安全閥,確保電池在極端過熱及濫用情況下,可以及時有效進行熱釋放。即使整車發生安全問題,電池模組內任何單一電芯發生熱失穩,電池包或模組仍能繼續工作,還可借助比克“一芯一碼”的智能追溯系統盡快查找到與電池相關的問題來源、生產批次等信息,幫助問題回溯和解決。

    熱失穩研究取得新進展,比克電池深攻高鎳811

    比克電池電芯研究院院長林建博士表示:“比克電池對單晶高鎳產品也進行了深入研究,通過材料及工程工藝的優化,使其相比高鎳二次粒子循環性能有所提升,同時單體電池也可以通過熱失穩測試。”

    據林建博士介紹,除了安全穩定的結構設計,電解液添加劑也可有效提高高鎳圓柱電芯的熱失穩行為,比克電池設有專門的電解液研發團隊,對各類添加劑有深入的研究,并已經將這些成果應用于高容量高鎳和硅合金電池體系中,實現安全與效能的雙保險。

    2018年,比克18650-3.0Ah電芯通過江淮大眾新能源汽車測試認證,測試標準高于國家標準,搭載此電芯的江淮IEV7S通過熱失穩測試,比克電池是至今國內唯一整車通過熱失穩測試的電池供應商。在18650-3.0Ah電芯的基礎上,比克21700-5.0Ah電芯在性能上實現了新的突破,2000次循環后容量仍大于80%,以100%的通過率通過了超五百次熱失穩模組驗證。兩款電芯在熱失穩上的優異表現驗證了比克電芯的超高安全性。目前,比克也在持續進行高鎳電芯熱失穩問題的研究,未來也將持續在電芯安全性能上實現突破。

    熱失穩研究取得新進展,比克電池深攻高鎳811

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