TW202303175A - Battery rapid screening method and battery rapid screening system - Google Patents
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本發明是有關於一種電池健康評估技術,且特別是有關於一種電池快篩方法以及電池快篩系統。The present invention relates to a battery health assessment technology, and in particular to a battery quick screening method and a battery quick screening system.
目前蓄電池產業面臨了大量的汰役蓄電池需進行回收的問題,但目前回收蓄電池的貴金屬其效益遠遠不足將其回收再利用,因此如何快速且有效地判斷蓄電池是否可活化再利用成為當前產業相當棘手的問題。對此,傳統的蓄電池可活化篩檢方式是透過對蓄電池進行耗時的實際充電測試,並且再透過判斷蓄電池的蓄電結果後,才能判斷此蓄電池是否可活化再利用。對此,蓄電池的蓄電結果判斷也往往容易發生誤判的情況。因此,傳統的蓄電池可活化篩檢方式具有耗時且不精確的缺點。At present, the battery industry is facing the problem that a large number of obsolete batteries need to be recycled, but the benefits of recycling precious metals in batteries are far from enough to recycle them. Therefore, how to quickly and effectively judge whether batteries can be activated and reused has become an important issue in the current industry. tough question. In this regard, the traditional battery reactivation screening method is to conduct a time-consuming actual charging test on the battery, and then judge whether the battery can be activated and reused after judging the storage result of the battery. In this regard, the judgment of the storage result of the storage battery is often prone to misjudgment. Therefore, the traditional battery reactivation screening method has the disadvantages of time-consuming and imprecise.
有鑑於此,本發明提供一種電池快篩方法以及電池快篩系統,可有效且快速地判斷蓄電池是否為可活化。In view of this, the present invention provides a battery rapid screening method and a battery rapid screening system, which can effectively and quickly determine whether the battery is activatable.
本發明的電池快篩方法包括以下步驟:放電蓄電池,以使蓄電池經放電後的荷電狀態低於或等於第一預設比例;透過電化學阻抗頻譜分析儀量測蓄電池,以取得對應於蓄電池的電化學阻抗譜;對電化學阻抗譜進行等效電路模擬,以取得等效電路模型的多個阻抗參數;以及透過線性分類器依據分類條件以及多個阻抗參數判斷蓄電池是否為可活化。The battery quick screening method of the present invention includes the following steps: discharging the battery so that the state of charge of the battery after discharge is lower than or equal to the first preset ratio; measuring the battery through an electrochemical impedance spectrum analyzer to obtain the corresponding Electrochemical impedance spectroscopy; performing equivalent circuit simulation on electrochemical impedance spectroscopy to obtain multiple impedance parameters of the equivalent circuit model; and judging whether the battery is activatable according to the classification conditions and multiple impedance parameters through a linear classifier.
本發明的電池快篩系統包括電化學阻抗頻譜分析儀、模擬模組以及線性分類器。電化學阻抗頻譜分析儀用以量測蓄電池並進行等效電路擬合,以取得對應於蓄電池的電化學阻抗譜。蓄電池在量測前被放電,以使蓄電池經放電後的荷電狀態低於或等於第一預設比例。模擬模組耦接電化學阻抗頻譜分析儀,並且用以對電化學阻抗譜進行等效電路模擬,以取得等效電路模型的多個阻抗參數。線性分類器耦接模擬模組,並且用以依據分類條件以及多個阻抗參數判斷蓄電池是否為可活化。The battery quick screening system of the present invention includes an electrochemical impedance spectrum analyzer, an analog module and a linear classifier. The electrochemical impedance spectrum analyzer is used to measure the battery and perform equivalent circuit fitting to obtain the electrochemical impedance spectrum corresponding to the battery. The battery is discharged before the measurement, so that the state of charge of the battery after discharge is lower than or equal to the first preset ratio. The simulation module is coupled to the electrochemical impedance spectrum analyzer, and is used for performing equivalent circuit simulation on the electrochemical impedance spectrum, so as to obtain multiple impedance parameters of the equivalent circuit model. The linear classifier is coupled to the simulation module, and is used for judging whether the storage battery is activatable according to the classification condition and a plurality of impedance parameters.
基於上述,本發明的電池快篩方法以及電池快篩系統,可透過線性分類器對蓄電池的電化學阻抗譜進行等效電路模擬後所產生的多個阻抗參數進行分析,以實現可快速篩檢蓄電池是否為可活化的效果,並且篩檢結果可具有高精確度。Based on the above, the battery rapid screening method and the battery rapid screening system of the present invention can analyze multiple impedance parameters generated by the equivalent circuit simulation of the electrochemical impedance spectrum of the battery through a linear classifier, so as to realize rapid screening. Whether the battery is activatable or not, and the screening results can be highly accurate.
為讓本發明的上述特徵和優點能更明顯易懂,下文特舉實施例,並配合所附圖式作詳細說明如下。In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail together with the accompanying drawings.
為了使本發明之內容可以被更容易明瞭,以下特舉實施例做為本揭示確實能夠據以實施的範例。另外,凡可能之處,在圖式及實施方式中使用相同標號的元件/構件/步驟,係代表相同或類似部件。In order to make the content of the present invention more comprehensible, the following specific embodiments are taken as examples in which the present disclosure can indeed be implemented. In addition, wherever possible, elements/components/steps using the same reference numerals in the drawings and embodiments represent the same or similar parts.
圖1是依照本發明的一實施例的電池快篩系統的示意圖。參考圖1,電池快篩系統100包括模擬模組110、線性分類器(Linear Classifiers)120以及電化學阻抗頻譜(Electrochemical Impedance Spectroscopy,EIS)分析儀130。模擬模組110耦接線性分類器120以及電化學阻抗頻譜分析儀130。在本實施例中,模擬模組110可例如是ZVIEW模擬軟體或其他等效電路模擬軟體。模擬模組110可對經放電後的蓄電池200由電化學阻抗頻譜分析儀130所量測出的數值進行等效電路擬合,並且對等效電路中的多個阻抗參數進行分析,以搭配線性分類器120依據多個阻抗參數來判斷蓄電池200是否為可活化。另外,在本發明的另一些實施例中,電池快篩系統100亦可採用非線性分類器(Non-Linear Classifiers)來實現之。FIG. 1 is a schematic diagram of a battery rapid screening system according to an embodiment of the present invention. Referring to FIG. 1 , the rapid
在本實施例中,電池快篩系統100可例如是以運算設備以及電化學阻抗頻譜分析儀130來實現之,其中運算設備可例如是電腦裝置,並且可包括處理器以及記憶體(Memory)。模擬模組110以及線性分類器120可分別為軟體程式或演算法,並且預先寫入或儲存於記憶體中,以供處理器存取並執行之。並且,運算設備可透過有線的方式電性連接於電化學阻抗頻譜分析儀130,以取得由電化學阻抗頻譜分析儀130分析蓄電池200後所輸出的電化學阻抗頻譜分析資料。In this embodiment, the battery
前述的電腦裝置可例如是桌上型電腦(Desktop Computer)、個人電腦(Personal Computer, PC)、筆記型電腦(Laptop PC)或平板電腦(Tablet PC)等,而本發明並不加以限制。前述的處理器可例如包括具有運算功能的中央處理單元(Central Processing Unit, CPU),或是其他可程式化之一般用途或特殊用途的微處理器(microprocessor)、數位信號處理器(Digital Signal Processor, DSP)、可程式化控制器、特殊應用積體電路(Application Specific Integrated Circuits, ASIC)、可程式化邏輯裝置(Programmable Logic Device, PLD)、其他類似處理裝置或這些裝置的結合。前述的記憶體可例如是動態隨機存取記憶體(Dynamic Random Access Memory, DRAM)、快閃記憶體(Flash memory)或非揮發性隨機存取記憶體(Non-Volatile Random Access Memory, NVRAM)等。The aforementioned computer device can be, for example, a desktop computer (Desktop Computer), a personal computer (Personal Computer, PC), a notebook computer (Laptop PC) or a tablet computer (Tablet PC), etc., and the present invention is not limited thereto. The aforementioned processor may, for example, include a central processing unit (Central Processing Unit, CPU) with computing functions, or other programmable general-purpose or special-purpose microprocessors (microprocessors), digital signal processors (Digital Signal Processors) , DSP), programmable controller, application specific integrated circuit (Application Specific Integrated Circuits, ASIC), programmable logic device (Programmable Logic Device, PLD), other similar processing devices or a combination of these devices. The aforementioned memory can be, for example, Dynamic Random Access Memory (Dynamic Random Access Memory, DRAM), Flash memory (Flash memory) or Non-Volatile Random Access Memory (Non-Volatile Random Access Memory, NVRAM), etc. .
然而,本實施例的電池快篩系統100的硬體實施態樣並不限於上述。在本發明的一些實施例中,模擬模組110以及線性分類器120亦可由不同運算設備執行或實現,或者是模擬模組110、線性分類器120以及電化學阻抗頻譜分析儀130皆整合至單一運算設備中。甚至,模擬模組110以及線性分類器120亦可以是透過雲端伺服器的運算平台來執行或實現之。However, the hardware implementation of the rapid
圖2是依照本發明的一實施例的電池快篩方法的流程圖。參考圖1以及圖2,電池快篩系統100可執行如以下步驟S210~S240,以實現電池快篩。在步驟S210,放電蓄電池200,以使蓄電池200經放電後的荷電狀態(State-Of-Charge,SOC)低於或等於第一預設比例。在本實施例中,蓄電池200在進行快篩之前,使用者可對蓄電池200進行放電,以使蓄電池200的荷電狀態低於或等於第一預設比例。對此,第一預設比例可例如是0%、20%、50%等,而本發明並不加以限制。在一實施例中,第一預設比例可依據不同的蓄電池類型來決定之。FIG. 2 is a flowchart of a battery rapid screening method according to an embodiment of the present invention. Referring to FIG. 1 and FIG. 2 , the rapid
在步驟S220,電池快篩系統100可透過電化學阻抗頻譜分析儀130量測蓄電池200,以取得對應於蓄電池200的電化學阻抗譜。對此,請搭配參考圖3A以及圖3B,圖3A是依照本發明的一實施例的可活化蓄電池的阻抗圖譜示意圖。圖3B是依照本發明的一實施例的無法活化蓄電池的阻抗圖譜示意圖。在本實施例中,電化學阻抗頻譜分析儀130可根據量測參數來量測蓄電池200,其中量測參數可包括起始頻率、停止頻率以及振幅。在一實施例中,起始頻率可例如是10千赫茲(kHz)。停止頻率可例如是0.1赫茲(Hz)。振幅可例如是100,000微安培(μA)。在本實施例中,電化學阻抗頻譜分析儀130量測蓄電池200後,可取得例如圖3A及圖3B所示的阻抗圖譜310、320的曲線test1~test15的其中之一,其中曲線test1~test8可為多個可活化蓄電池的參考電化學阻抗譜的範例,並且曲線test9~test15可為多個無法活化蓄電池的參考電化學阻抗譜的範例。然而,圖3A及圖3B僅為範例說明,本發明的蓄電池200所對應的電化學阻抗譜並不限於圖3A及圖3B所呈現的態樣。In step S220 , the rapid
在步驟S230,電池快篩系統100的模擬模組110可對蓄電池200的電化學阻抗譜進行等效電路模擬,以取得等效電路模型的多個阻抗參數。對此,請搭配參考圖4,圖4是依照本發明的一實施例的等效電路模型的示意圖。在本實施例中,等效電路模型400可包括電感L1、第一電阻R1、第一電容C1、第二電阻R2、第二電容C2、第三電阻R3以及韋伯(Warburg)電阻W1。第一電阻R1的第一端耦接電感L1的第一端。第一電容C1的第一端耦接第一電阻E1的第二端。第二電阻R2的第一端耦接第一電容C1的第一端。第二電阻R2的第二端耦接第一電容C1的第二端。第二電容C2的第一端耦接第一電容C1的第二端。第三電阻R3的第一端耦接第二電容C2的第一端。第二電阻R2的第二端耦接第二電容C2的第二端。韋伯電阻W1的第一端耦接第二電容C2的第二端。值得注意的是,第一電阻R1、第一電容C1以及第二電阻R2可為對應於蓄電池200的固態電解質介面(Solid Electrolyte Interphase,SEI)膜阻抗的分析結果。模擬模組110可取得電感L1所對應的電感阻抗參數、第一電阻R1所對應的歐姆阻抗參數、第一電容C1以及第二電阻R2所分別對應的SEI膜阻抗參數、第二電容C2及第三電阻R3所分別對應的質傳阻抗參數以及韋伯電阻W1所對應的阻抗參數。In step S230 , the
在步驟S240,電池快篩系統100可透過線性分類器120依據分類條件以及多個阻抗參數判斷蓄電池200是否為可活化。對此,請搭配參考圖4及圖5,圖5是依照本發明的一實施例的線性分類示意圖。在本實施例中,線性分類器120可將分類線510作為分類條件,並且線性分類器120可判斷第一電阻R1以及第二電阻R2的阻抗參數比對是否屬於可活化分類,以判斷蓄電池200是否為可活化。如圖5所示,當第一電阻R1以及第二電阻R2的阻抗參數比對位於分類線510的上半部分時,線性分類器120可判斷此阻抗參數比對屬於無法活化分類。當第一電阻R1以及第二電阻R2的阻抗參數比對位於分類線510的下半部分時,線性分類器120可判斷此阻抗參數比對屬於可活化分類。然而,本發明並不限於透過判斷第一電阻R1以及第二電阻R2的阻抗參數比對的方式來判斷蓄電池200是否為可活化。在一實施例中,線性分類器120可判斷第一電阻R1、第一電容C1以及第二電阻R2的至少其中之二個的阻抗參數比對是否屬於可活化分類。換言之,在一實施例中,線性分類器120可建立對應於第一電阻R1、第一電容C1以及第二電阻R2的至少其中之二個的阻抗參數的分類條件來判斷蓄電池200是否為可活化。In step S240, the battery
因此,經由上述步驟S210~S240,本實施例的電池快篩系統100以及電池快篩方法,可快速且精準地判斷蓄電池200是否為可活化。並且,在一實施例中,當電池快篩系統100判斷蓄電池200為可活化時,使用者或電池快篩系統100可對蓄電池200施加以複合波充電信號,以有效活化蓄電池200。前述的複合波充電信號可例如是由多個不同頻率及/或振幅的方波、弦波及/或三角波等不同波形所組合而成,而本發明並不加以限制。前述的複合波充電信號的電壓振幅可例如是介於0.7伏特至-0.1伏特之間。另外,本實施例的蓄電池200可為鋰系(Lithium Ion Battery,Li-ion)電池,但本發明並不限於此。本發明的電池快篩系統100以及電池快篩方法亦可適用於其他類型的蓄電池。Therefore, through the above steps S210-S240, the battery
圖6是依照本發明的一實施例的電池分析系統的示意圖。圖7是依照本發明的一實施例的建立線性分類器的流程圖。圖6的電池分析系統可包括運算設備600、電化學阻抗頻譜分析儀630以及充放電設備640。運算設備600包括模擬模組610以及線性分類器120。本實施例的電池分析系統的硬體特徵可由上述圖1實施例的說明而類推,因此不多加贅述。在本實施例中,圖1的線性分類器120的分類條件的建立方式可預先經由圖6的電池分析系統以及圖7的步驟S710~S750來實現之。參考圖6及圖7,在步驟S710,充放電設備640可放電多個參考蓄電池700_1~700_N,其中N為正整數。在本實施例中,使用者可預先選擇同類型的參考蓄電池700_1~700_N(多個老化電池),並且透過恆壓/恆流(CV/CC)充電法來判斷參考蓄電池700_1~700_N的電池容量。接著,使用者可利用充放電設備640來放電參考蓄電池700_1~700_N,以使參考蓄電池700_1~700_N的荷電狀態低於或等於第一預設比例。FIG. 6 is a schematic diagram of a battery analysis system according to an embodiment of the present invention. FIG. 7 is a flowchart of building a linear classifier according to an embodiment of the present invention. The battery analysis system in FIG. 6 may include a
在步驟S720,電化學阻抗頻譜分析儀630量測參考蓄電池700_1~700_N,以取得對應於參考蓄電池700_1~700_N的多個參考電化學阻抗譜。對此,請搭配參考圖3A以及圖3B,在本實施例中,電化學阻抗頻譜分析儀630可根據量測參數來量測參考蓄電池700_1~700_N,其中量測參數的參數內容可如同上述實施例的說明,因此在此不多加贅述。在本實施例中,電化學阻抗頻譜分析儀630分別量測參考蓄電池700_1~700_N後,可取得例如圖3A及圖3B所示的阻抗圖譜310、320的曲線test1~test15。然而,圖3A及圖3B僅為範例說明,本發明的參考蓄電池700_1~700_N的多個參考電化學阻抗譜並不限於圖3A及圖3B所呈現的態樣。In step S720 , the electrochemical
在步驟S730,運算設備600的模擬模組610分別對圖3A及圖3B所示的曲線test1~test15的多個參考電化學阻抗譜進行等效電路模擬,以取得個別對應於多個參考電化學阻抗譜的等效電路模型的多個參考阻抗參數。對此,請搭配參考圖4,使用者可將圖3A及圖3B的多個參考電化學阻抗譜的資料輸入至模擬模組610。模擬模組610可根據如圖4的等效電路模型400來取得參考蓄電池700_1~700_N多個參考電化學阻抗譜分別對應的多個阻抗參數,例如多個參考電化學阻抗譜各別對應的第一電阻R1所對應的歐姆阻抗參數以及第二電阻R2所對應的SEI膜阻抗參數,但本發明並不限於此。在一實施例中,模擬模組610可取得多個參考電化學阻抗譜各別對應的第一電阻R1、第一電容C1以及第二電阻R2的至少其中之二個的阻抗參數。In step S730, the
在步驟S740,充放電設備640對參考蓄電池700_1~700_N施加以複合波充電信號,以透過複合波充電信號分別對參考蓄電池700_1~700_N進行充電驗證,以取得多個充電驗證結果。換言之,使用者可實際對參考蓄電池700_1~700_N進行充電,以判斷參考蓄電池700_1~700_N中屬於可活化的部分以及無法活化的部分,並且將參考蓄電池700_1~700_N的多個充電驗證結果輸入至運算設備600的線性分類器120之中。在本實施例中,電池分析系統可將參考蓄電池700_1~700_N中的電池健康狀態比例(State of Health,SOH)為高於第二預設比例的部分定義為可活化分類,並且將參考蓄電池700_1~700_N中的電池健康狀態比例為低於或等於第二預設比例的部分定義為無法活化分類。電池健康狀態比例為當前電池最大可使用容量除以電池標準容量的百分比。In step S740 , the charging and discharging
在步驟S750,運算設備600的線性分類器120依據多個充電驗證結果以及對應於多個參考電化學阻抗譜的多個參考阻抗參數進行分析,以建立線性分類器120的分類條件。請搭配參考圖5,線性分類器120可將參考蓄電池700_1~700_N分別對應的第一電阻R1以及第二電阻R2的多個阻抗參數比對結果產生如圖5所示的散點圖(scatter),並且根據多個充電驗證結果來標記散點圖中的各點屬性為活化成功或活化失敗。接著,線性分類器120可根據圖5所示的散點圖的分布結果來定義分類線510的位置,但本發明的分類線的位置並不限於圖5。因此,本實施例的電池分析系統可有效地建立線性分類器120的分類條件,以使本發明的電池快篩方法以及電池快篩系統可採用已建立分類條件的線性分類器120來實現精準的電池篩檢效果。In step S750 , the
綜上所述,本發明的電池快篩方法以及電池快篩系統可利用預設的等效電路模型來分析蓄電池的電化學阻抗頻譜,以取得對應的多個阻抗參數,並且搭配已預設建立分類條件的線性分類器來根據這些阻抗參數判斷蓄電池是否可活化。因此,本發明的電池快篩方法以及電池快篩系統無須透過耗時的實際充電測試,即可實現快速且精準地判斷蓄電池是否可活化的功能。To sum up, the battery rapid screening method and the battery rapid screening system of the present invention can use the preset equivalent circuit model to analyze the electrochemical impedance spectrum of the battery to obtain a plurality of corresponding impedance parameters, and match the preset established A linear classifier of classification conditions is used to judge whether the battery can be activated according to these impedance parameters. Therefore, the battery rapid screening method and battery rapid screening system of the present invention can quickly and accurately determine whether the battery can be activated without going through a time-consuming actual charging test.
雖然本發明已以實施例揭露如上,然其並非用以限定本發明,任何所屬技術領域中具有通常知識者,在不脫離本發明的精神和範圍內,當可作些許的更動與潤飾,故本發明的保護範圍當視後附的申請專利範圍所界定者為準。Although the present invention has been disclosed above with the embodiments, it is not intended to limit the present invention. Anyone with ordinary knowledge in the technical field may make some changes and modifications without departing from the spirit and scope of the present invention. The scope of protection of the present invention should be defined by the scope of the appended patent application.
100:電池快篩系統
110、610:模擬模組
120:線性分類器
130、630:電化學阻抗頻譜分析儀
200:蓄電池
310、320:阻抗圖譜
400:等效電路模型
510:分類線
700_1~700_N:參考蓄電池
test1~test15:曲線
S210~S240、S710~S750:步驟
100: Battery
圖1是依照本發明的一實施例的電池快篩系統的示意圖。 圖2是依照本發明的一實施例的電池快篩方法的流程圖。 圖3A是依照本發明的一實施例的可活化蓄電池的阻抗圖譜示意圖。 圖3B是依照本發明的一實施例的無法活化蓄電池的的阻抗圖譜示意圖。 圖4是依照本發明的一實施例的等效電路模型的示意圖。 圖5是依照本發明的一實施例的線性分類示意圖。 圖6是依照本發明的一實施例的電池分析系統的示意圖。 圖7是依照本發明的一實施例的建立線性分類器的流程圖。 FIG. 1 is a schematic diagram of a battery rapid screening system according to an embodiment of the present invention. FIG. 2 is a flowchart of a battery rapid screening method according to an embodiment of the present invention. FIG. 3A is a schematic diagram of an impedance spectrum of an activatable battery according to an embodiment of the present invention. FIG. 3B is a schematic diagram of an impedance spectrum of a non-activatable battery according to an embodiment of the present invention. FIG. 4 is a schematic diagram of an equivalent circuit model according to an embodiment of the invention. Fig. 5 is a schematic diagram of linear classification according to an embodiment of the present invention. FIG. 6 is a schematic diagram of a battery analysis system according to an embodiment of the present invention. FIG. 7 is a flowchart of building a linear classifier according to an embodiment of the present invention.
S210~S240:步驟 S210~S240: steps
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