200945726 \jyO\jx 27170twf.doc/n 九、發明說明： 【發明所屬之技術領域】 本發明是有關於一種充電裝置及其充電方法，且特別是 有關於一種可提高電池充電效率及不傷害充電電池的充電 裝置及其充電方法。 【先前技術】 隨著科技的進步’各類電子產品皆朝向高速度、高效 ❹ 此、且輕》專短小的趨勢去發展。於是，各種可攜式電子裝 置逐漸成為主流，例如可攜式多媒體撥放器（p〇rtable Multimedia Player，PMP)、行動電話、Mp3撥放器和筆記 型電腦(Note Book)等。為了便利於使用者攜帶和使用，通 常都會在可攜式電子裝置中配置可充電電池，以增加可攜 式電子裝置的實用性。 圖1為習知定電流切換定電壓充電法之電壓及電流波 形圖。請參照圖1 ’波形101為充電電壓，波形1〇2為充 電電流。一般常用定電流切換定電壓充電法進行充電，此 ❹ 減法献電流及定電壓充電法之結合，目此又稱二階段 充電法。在電池充電的初期，會使用定電流充電法對電池 充電，此為第一階段。此時充電電壓(波形101)會隨著充電 時間而上升，而充電電流(波形102)則保持固定。當電池電 壓接近切換電壓Vsw時(如時間T1所示），使用定電壓充 =法?電池充電’此為第二階段。此時充電電流(波形102) 隨著充電時間而下降’而充電電壓(波形101)在到達切換 電壓VSW後則保持固定。第一階段的定電流充電法的目的 200945726 υ^υυιυζ,ι vV 27170twf.doc/n 在於可以使充電電壓以較快的速度達到所設定的切換電壓 值。而第二階段的定電壓充電法則會產生較小的充電電 流’以補償定電流充電法的缺點，使電池不會有虛充的現 象以提咼電池充電的飽和度。但是，電流的充電時間及充 電效率仍要視其設定的切換電壓和初始的充電電流來決 定’通常仍須花費較長的時間來對電池充電以碟保電池的 飽和度。 【發明内容】 ❹ 本發明的目的在提供一種智慧型充電裝置，可以使充 電電池更有效率的使用。 從另一方面來看’本發明的目的在提供一種智慧型充 電方法，同樣可以使充電電池更有效率的使用。 本發明提供一種智慧型充電裝置，適用於充電電池， 其包括充電單元、量測單元及運算單元。充電單元將外部 電源轉換為充電電流’用此充電電流對充電電池充電。接 著量測單元會在充電電池進行充電的過程中，即時量測充 ❹ 電1池的内阻變化，並即時產生内阻量測值。而運算單元 耦接量測單元和充電單元，並依據内阻量測值而即時產生 控制訊號，此控制訊號會傳送到充電單元，充電單元則依 據控制訊號調整充電電流的大小。 在本發明之一實施例中，上述之量測單元更可以量測 充電電池在充電期間的電壓變化，並即時產生電壓量測值 給運算單元，使運算單元依據電壓量測值而產生控制訊號。 在本發明之一實施例中，上述之量測單元更可以量測 200945726 \j7WL\fz. k W 27170twf.doc/n 電期間的輸出電流變化，並即時產生電流量 測值、，.口運开早凡’使運算單元依據電流量測值而產生控制 訊號。 在本發明之一實施例中，上述之量測單元更可以量測 充電電池在充電期間的溫度變化，並即時產生溫度量測值 給運算單元’使得運算單元依據溫度量難而產生控制訊 號。 ❹ 從另一觀點來看，本發明也提供一種智慧型充電方 法，適於對充電電池進行充電，而智慧型充電&法包括下 列步驟。首先，轉換一外部電源為一充電電流，以對充電 電池進行充電。接著，在充電電池充電期間，即時量測充 電電池的内阻值。最後，依據充電電池在充電期間之内阻 值的變化來調整充電電流的大小。 在本發明之一實施例中，上述之調整充電電流大小的 步驟，更包括下列步驟。當目前量測到充電電池的内阻值 變大時，則降低充電電流的大小。當目前量測到充電電池 © 的内阻值變小時，則增加充電電流的大小。 在本發明之一實施例中，上述之智慧型充電方法，更 包括在充電電池充電期間即時量測其電壓變化，以產生最 適之充電電流的大小。 在本發明之一實施例中，上述之智慧型充電方法，更 包括在充電電池充電期間即時量測其輸出電流變化，以產 生最適之充電電流的大小。 在本發明之一實施例中，上述之智慧型充電方法，更 7 27170twf.d〇c/n 200945726 包括在充電電池充電期間即時量測其温度變化，以產生最 適之充電電流的大小。 本發明透過對充電電池的即時量測，藉以了解現在充 電電池的充電狀態，根據其充電狀態進而調整其充電電 流。藉此’本發明可提供充電電池不傷害電池的充電電流 及有效提高充電的效率，讓充電電池使用壽命不因充電褒 置不當的充電電流而減少。 為讓本發明之上述和其他目的、特徵和優點能更明顯 易懂’下文特舉較佳實施例，並配合所附圖式，作詳細說 明如下。 【實施方式】 圖2為根據本發明一實施例之智慧型充電裝置2〇〇方 塊圖。請參照圖2 ’本實施例所提供的充電裝置2〇〇包括 充電單元211、量測單元212和運算單元213。充電單元 211可以接收一外部電源，並且可以用來耦接一充電電池 220。另外，當充電電池22〇與充電裝置200耦接時，量測 ❹ 單元212也可以编接充電電池220，並且耗接運算單元 213。而運算單元213除了耦接量測單元212以外，還可以 耦接充電單元211。在本實施例中，充電電池例如是鉛酸 電池、鎳鎘電池、鎳鐵電池、鎳氫電池、鋰離子電池或其 他可以進行二次充電的電池。 —承上述，充電單元211所接收的外部電源可以是—般 以家用交流電為主，但設計者可以視設計及環境需求而^ 所不同。充電單元211可以轉換所接收的外部電源而輸出 200945726 · uyou i uz i v/ 27170twf.doc/n 一充電電流給充電電池220,以對充電電池220進行充電。 在充電電池220進行充電的期間，量測單位212可以 隨時量測充電電池220的一些電氣特性參數。特別的是， 在本實施例中，量測單元212可以量測充電電池22〇在充 電期間内阻的變化。當量測單元212量測到充電電池220 即時的内阻值時，可以將此即時的内阻值送至運算單元 213進行運算’使得運算單元213可以依據量測單元212 珍即時量測到的内阻值而產生一控制訊號給充電旱元211。 藉此，充電單元211就可以依據控制訊號而調整充電電流 的大小。 在另外一些選擇實施例中，量測單元212除了可以量 測充電電池220在充電期間的内阻變化之外，還可以量測 其它的電氣特性參數，例如電壓、輸出電流以及溫度的變 化。當量測單元212量測到這些電氣特性參數後，同樣也 可以將其送至運算單元213處理，以使運算單元213依據 這些電氣特性參數產生控制訊號給充電單元2Π。 0 以下提出一實施例，可以說明本發明之充電裝置如何 利用充電電池在充電期間之電阻的變化來調整充電電流的 大小。圖3為根據本發明之一實施例的智慧型充電方法流 程圖。請合併參照圖2及圖3，在步驟S301中，量測單元 212會在充電電池220的充電期間，即時的量測充電電池 220的内阻值’並即時的產生内阻量測值。接著在步驟幻〇2 中，運算單元213會比較現在量測到内阻值與原始内阻 值，當察覺充電電池的内阻值改變時，會依據其内阻值的 9 200945726 ， ν/7υνιυχ! ν/ 27170twf.doc/n 變化執行相對映的步驟。當充電電池220的内阻變大，代 表充電電流過大，此時會執行步驟s303，降低充電電流的 大小，藉以降低内阻值到回復原始内阻值;反之，當充電電 池的内阻值變小時’則代表充電電流過小，則執行步驟 S304 ’增充電電流的大小，藉以增加内阻值到原始内阻 值。最後’在步驟S305會輸出調整後的充電電流，此電 流會適於對充電電池充電，且在快速充電的情況下不會對 充電電池造成傷害。 曰在上述所提另外一些選擇實施例中，量測單元211除 I測内阻外’還可以量測其它的電氣特性參數，例如電壓、 ，出電流以及溫度的變化。運算單元213亦會依據這些電 氣特性對充電電流進行調整，在調整過後的充電電流大 小，^生最適合對充電電池22〇充電的充電電流大小。 _綜上所述’在本發明之智慧型充電裝置及其充電方法 經由對充電電池即時的量測，以發現充電電池内阻的變 ，’並依據其内阻量顺產生_城，藉此控制訊號則 月b使充電電极調整到適於對現在的充電電池進行充電，且 此，，電流為不傷害充電電池的最大電流上限。故本發明 充電電相充電效率及不會減少其使用壽命，使充 電電池達到最佳的使用狀態。 眼本發明已以較佳實施_露如上，然其並非用以 二二明、:任何熟習此技藝者’在不脫離本發明之精神 i:〆、目二當可作些許之更動與潤飾，因此本發明之保護 關當視軸0料· _界定者為準。 200945726 υνουιυζι v/ 27170twf,doc/n 【圖式簡單說明】 圖1為習知定電流切換定電壓充電法之電壓及電流波 形圖。 圖2為根據本發明一實施例之充電系統方塊圖。 圖3為根據本發明之一實施例的智慧型充電方法流程 圖。 【主要元件符號說明】 101、102 :波形 200 :智慧型充電裝置 211 :充電單元 212 :量測單元 213 :運算單元 220 :充電電池 S301〜S305 :步驟 T1 :時間 11200945726 \jyO\jx 27170twf.doc/n IX. Description of the Invention: [Technical Field] The present invention relates to a charging device and a charging method thereof, and particularly to an improvement in battery charging efficiency and no damage charging Battery charging device and charging method thereof. [Prior Art] With the advancement of technology, all kinds of electronic products are moving toward high speed, high efficiency, and lightness. As a result, a variety of portable electronic devices have become mainstream, such as portable multimedia players (PMPs), mobile phones, Mp3 players, and notebooks (Note Book). In order to facilitate the user to carry and use, a rechargeable battery is usually arranged in the portable electronic device to increase the usability of the portable electronic device. Fig. 1 is a waveform diagram showing voltage and current of a conventional constant current switching constant voltage charging method. Referring to Fig. 1, 'waveform 101 is the charging voltage, and waveform 1〇2 is the charging current. Generally, the constant current switching constant voltage charging method is commonly used for charging, and the combination of the subtracting current and the constant voltage charging method is also called a two-stage charging method. At the beginning of battery charging, the battery is charged using the constant current charging method. This is the first stage. At this time, the charging voltage (waveform 101) rises with the charging time, and the charging current (waveform 102) remains fixed. When the battery voltage approaches the switching voltage Vsw (as indicated by time T1), the constant voltage is used to charge the battery. This is the second stage. At this time, the charging current (waveform 102) drops with the charging time' while the charging voltage (waveform 101) remains fixed after reaching the switching voltage VSW. The purpose of the first stage of the constant current charging method is 200945726 υ^υυιυζ, ι vV 27170twf.doc/n in that the charging voltage can be reached at a faster speed to the set switching voltage value. The second stage of the constant voltage charging method produces a smaller charging current to compensate for the shortcomings of the constant current charging method, so that the battery does not have a false charge to improve the saturation of the battery charging. However, the charging time and charging efficiency of the current are still determined by the set switching voltage and the initial charging current. It usually takes a long time to charge the battery to ensure the saturation of the battery. SUMMARY OF THE INVENTION An object of the present invention is to provide a smart charging device that can make a charging battery more efficient to use. Viewed from another aspect, the object of the present invention is to provide an intelligent charging method which also enables a more efficient use of a rechargeable battery. The invention provides a smart charging device suitable for a rechargeable battery, which comprises a charging unit, a measuring unit and an arithmetic unit. The charging unit converts the external power source into a charging current. The charging battery is used to charge the rechargeable battery. Then, the measuring unit will measure the internal resistance of the charging battery 1 in the process of charging the rechargeable battery, and instantly generate the internal resistance measurement value. The computing unit is coupled to the measuring unit and the charging unit, and generates a control signal according to the internal resistance measurement value. The control signal is transmitted to the charging unit, and the charging unit adjusts the charging current according to the control signal. In an embodiment of the present invention, the measuring unit can measure the voltage change of the rechargeable battery during charging, and immediately generate a voltage measurement value to the operation unit, so that the operation unit generates the control signal according to the voltage measurement value. . In an embodiment of the present invention, the measuring unit can measure the output current change during the period of 200945726 \j7WL\fz. k W 27170twf.doc/n, and immediately generate the current measurement value, and the port is shipped. Open early to 'make the arithmetic unit to generate control signals based on the current measurement. In an embodiment of the invention, the measuring unit can further measure the temperature change of the rechargeable battery during charging, and immediately generate the temperature measurement value to the arithmetic unit ’ so that the computing unit generates the control signal according to the temperature. ❹ From another point of view, the present invention also provides a smart charging method suitable for charging a rechargeable battery, and the smart charging & method includes the following steps. First, an external power source is converted to a charging current to charge the rechargeable battery. Then, during the charging of the rechargeable battery, the internal resistance of the rechargeable battery is measured instantaneously. Finally, the magnitude of the charging current is adjusted based on the change in the resistance of the rechargeable battery during charging. In an embodiment of the invention, the step of adjusting the magnitude of the charging current further includes the following steps. When the internal resistance value of the rechargeable battery is currently measured to be large, the magnitude of the charging current is lowered. When the internal resistance value of the rechargeable battery © is measured to be small, the magnitude of the charging current is increased. In an embodiment of the invention, the smart charging method described above further includes measuring a voltage change of the rechargeable battery during charging to generate an optimum charging current. In an embodiment of the invention, the smart charging method described above further includes measuring an output current change during charging of the rechargeable battery to generate an optimum charging current. In an embodiment of the invention, the intelligent charging method described above further includes 27 27 twfd.d〇c/n 200945726 including instantaneously measuring the temperature change during charging of the rechargeable battery to generate an optimum charging current. The present invention uses the instantaneous measurement of the rechargeable battery to understand the state of charge of the currently charged battery, and then adjusts its charging current according to its state of charge. Accordingly, the present invention can provide a charging battery that does not damage the charging current of the battery and effectively improves the efficiency of charging, so that the life of the rechargeable battery is not reduced by the charging current that is improperly charged. The above and other objects, features, and advantages of the present invention will become more apparent <RTIgt; [Embodiment] FIG. 2 is a block diagram of a smart charging device according to an embodiment of the present invention. Referring to FIG. 2, the charging device 2 provided in the present embodiment includes a charging unit 211, a measuring unit 212, and an arithmetic unit 213. The charging unit 211 can receive an external power source and can be used to couple a rechargeable battery 220. In addition, when the rechargeable battery 22 is coupled to the charging device 200, the measuring unit 212 can also fabricate the rechargeable battery 220 and consume the arithmetic unit 213. The computing unit 213 can be coupled to the charging unit 211 in addition to the measuring unit 212. In the present embodiment, the rechargeable battery is, for example, a lead-acid battery, a nickel-cadmium battery, a nickel-iron battery, a nickel-hydrogen battery, a lithium ion battery, or the like which can be recharged. - In view of the above, the external power source received by the charging unit 211 can be generally based on household AC power, but the designer can vary depending on the design and environmental requirements. The charging unit 211 can convert the received external power source to output a charging current to the rechargeable battery 220 to charge the rechargeable battery 220. During the charging of the rechargeable battery 220, the measurement unit 212 can measure some of the electrical characteristic parameters of the rechargeable battery 220 at any time. In particular, in the present embodiment, the measuring unit 212 can measure the change in the internal resistance of the rechargeable battery 22 during charging. When the equivalent measuring unit 212 measures the instantaneous internal resistance value of the rechargeable battery 220, the instantaneous internal resistance value can be sent to the operation unit 213 for calculation, so that the arithmetic unit 213 can be measured according to the measuring unit 212. The internal resistance value generates a control signal for charging the dry element 211. Thereby, the charging unit 211 can adjust the magnitude of the charging current according to the control signal. In other alternative embodiments, measurement unit 212 can measure other electrical characteristic parameters, such as voltage, output current, and temperature, in addition to measuring the internal resistance change of rechargeable battery 220 during charging. After measuring the electrical characteristic parameters, the equivalent measuring unit 212 can also send it to the arithmetic unit 213 for processing, so that the arithmetic unit 213 generates a control signal to the charging unit 2 according to the electrical characteristic parameters. An embodiment will be described below to explain how the charging apparatus of the present invention adjusts the magnitude of the charging current by utilizing the change in resistance of the rechargeable battery during charging. 3 is a flow chart of a smart charging method in accordance with an embodiment of the present invention. Referring to FIG. 2 and FIG. 3 together, in step S301, the measuring unit 212 instantaneously measures the internal resistance value of the rechargeable battery 220 during the charging of the rechargeable battery 220 and instantaneously generates an internal resistance measurement value. Then, in step illusion 2, the operation unit 213 compares the measured internal resistance value with the original internal resistance value, and when it is detected that the internal resistance value of the rechargeable battery changes, it is based on the internal resistance value of 9 200945726, ν/7υνιυχ ! ν/ 27170twf.doc/n Change the steps to perform the relative mapping. When the internal resistance of the rechargeable battery 220 becomes large, indicating that the charging current is too large, step s303 is performed to reduce the magnitude of the charging current, thereby reducing the internal resistance value to restore the original internal resistance value; conversely, when the internal resistance value of the rechargeable battery is changed The hour' indicates that the charging current is too small, and then the step S304 is performed to increase the magnitude of the charging current, thereby increasing the internal resistance value to the original internal resistance value. Finally, in step S305, the adjusted charging current is output, which is suitable for charging the rechargeable battery and does not cause damage to the rechargeable battery in the case of rapid charging. In other alternative embodiments mentioned above, the measuring unit 211 can measure other electrical characteristic parameters, such as voltage, current, and temperature, in addition to the internal resistance. The arithmetic unit 213 also adjusts the charging current according to these electrical characteristics, and the charging current is adjusted to be the most suitable charging current for charging the rechargeable battery 22〇. In summary, the intelligent charging device and the charging method thereof according to the present invention detect the change of the internal resistance of the rechargeable battery through the instantaneous measurement of the rechargeable battery, and generate the _city according to the internal resistance thereof. The control signal then adjusts the charging electrode to be suitable for charging the current rechargeable battery, and the current is the maximum current limit that does not harm the rechargeable battery. Therefore, the charging electric phase charging efficiency of the invention does not reduce the service life thereof, so that the charging battery can be optimally used. The present invention has been described as a preferred embodiment. However, it is not intended to be used in the context of the invention. Any person skilled in the art can make a few changes and refinements without departing from the spirit of the present invention. Therefore, the protection of the present invention is determined by the visual axis 0 _ defined. 200945726 υνουιυζι v/ 27170twf, doc/n [Simple diagram of the diagram] Figure 1 is a waveform diagram of voltage and current of a conventional constant current switching constant voltage charging method. 2 is a block diagram of a charging system in accordance with an embodiment of the present invention. 3 is a flow chart of a smart charging method in accordance with an embodiment of the present invention. [Description of main component symbols] 101, 102: Waveform 200: Smart charging device 211: Charging unit 212: Measuring unit 213: Computing unit 220: Rechargeable battery S301 to S305: Step T1: Time 11