TW201444226A - Method for determining charging endpoint - Google Patents
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- TW201444226A TW201444226A TW102117034A TW102117034A TW201444226A TW 201444226 A TW201444226 A TW 201444226A TW 102117034 A TW102117034 A TW 102117034A TW 102117034 A TW102117034 A TW 102117034A TW 201444226 A TW201444226 A TW 201444226A
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本發明係有關於一種充電結束點的判斷方法，尤其是在定電壓小電流充電時利用脈波寬度調變驅動控制器判斷脈波寬度調變信號之工作寬度是否低於預設寬度以決定充電結束點。 The invention relates to a method for judging a charging end point, in particular, using a pulse width modulation driving controller to determine whether a working width of a pulse width modulation signal is lower than a preset width to determine charging during constant voltage and small current charging. End point.
許多手持式或可攜式的電子裝置，比如手表、手機、筆電(筆記型電腦)、平板電腦、遙控器、收錄音機、隨身聽、錄音筆、相機，無法使用價格低的市電當作電源而運作，而是需要體積小、重量輕、具有相當電量及相當便性的電池以提供所需的電力，比如一次電池的碳鋅電池、鹼性電池、水銀電池，或二次電池(亦即充電電池)的鎳鎘電池、鎳氫電池、鋰電池、鋰鐵電池，其中充電電池具有可多次充電、放電的重複循環使用特性，不僅可減少廢棄物，同時也具有相當的節能減碳功效，因此，已成為上述電子裝置的主要電源，尤其是手機、筆電、平板電腦。 Many handheld or portable electronic devices, such as watches, mobile phones, laptops (notebooks), tablets, remote controls, tape recorders, walkmans, voice recorders, cameras, cannot be used as a power source with low-cost utility power. To operate, it is required to have a small, lightweight, and relatively versatile battery to provide the required power, such as a carbon-zinc battery, an alkaline battery, a mercury battery, or a secondary battery of a primary battery (ie, Rechargeable battery) nickel-cadmium battery, nickel-hydrogen battery, lithium battery, lithium-iron battery, in which the rechargeable battery has repeated recycling characteristics of multiple charging and discharging, which not only reduces waste, but also has considerable energy-saving and carbon-reducing effects. Therefore, it has become the main power source of the above electronic devices, especially mobile phones, notebooks, and tablets.
依據充電電池的電化學特性，一般的充電程序可包括定電流充電、定電壓充電、小電流充電等等步驟，藉以縮短充電時間，同時儘量提高可充電量。然而，充電電池在充電時，尤其是鋰系電池，須避免過度充電，否則可能會發生過熱、產生高活性物質(比如氫氣)而造成毀損或甚至***起火。因此，負責充電的充電器通常需要偵測電池是否達到充飽程度，並在充飽時，停止充電，以防止過度充電的危險。 According to the electrochemical characteristics of the rechargeable battery, the general charging procedure may include steps of constant current charging, constant voltage charging, small current charging, etc., thereby shortening the charging time while maximizing the chargeable amount. However, when charging a rechargeable battery, especially a lithium-based battery, excessive charging must be avoided, otherwise overheating may occur, resulting in high active substances (such as hydrogen) causing damage or even an explosion. Therefore, the charger responsible for charging usually needs to detect whether the battery is fully charged and stop charging when it is full to prevent the danger of overcharging.
在習用技術中，偵測電池是否充飽的最簡單且常使用的手段是電流感測方式。具體而言，使用感測電阻串接在切換電晶體，讓切換電晶體的導通電流流過感測電阻，並藉控制電路偵測在感測電阻上的感測電壓而決定電池的充飽程度。不過，在實際電路上一般是儘可能使用很小電阻，以避免功耗的浪費，因此感測電流及感測電壓很低。尤其是在電池接近充飽時，感測電流會更低，使得感測電壓過低而不容易精確偵測，可能造成充電結束點的誤判，比如太早結束而充電量不足，或太晚結束而過度充電，甚至影響安全性。 In conventional techniques, the simplest and often used means of detecting whether a battery is full is current sensing. Specifically, the sensing resistor is connected in series to switch the transistor, the switching current of the switching transistor flows through the sensing resistor, and the sensing circuit detects the sensing voltage on the sensing resistor to determine the degree of battery fullness. . However, in practical circuits, it is common to use as small a resistor as possible to avoid waste of power consumption, so the sense current and sense voltage are very low. Especially when the battery is nearly full, the sensing current will be lower, making the sensing voltage too low and not easy to detect accurately, which may cause misjudgment of the charging end point, such as too early end and insufficient charging, or too late. Overcharging even affects safety.
上述問題的習用技術解決方法是使用高靈敏度及高增益的類比放大器，可配置在控制電路中，用以精確放大微小的感測電壓，這不僅會導致成本增加，且還因這類放大器容易受到周圍電氣環境的干擾而影響電氣特性，大大增加實體電路佈局上的困難程度，甚至無法具體實現。 A conventional technical solution to the above problem is to use a high-sensitivity and high-gain analog amplifier that can be configured in the control circuit to accurately amplify a small sensing voltage, which not only causes an increase in cost, but also is susceptible to such an amplifier. The interference of the surrounding electrical environment affects the electrical characteristics, greatly increasing the difficulty of the physical circuit layout, and even cannot be realized.
因此，需要一種充電結束點的判斷方法，可在充電電池單元接近充飽時，精確判斷充電結束點的結束點而停止進一步充電，避免充電電池單元充電量不足或被過度充電而損壞，提高可利用電量並改善安全性，藉以解決上述習用技術的問題。 Therefore, there is a need for a method for judging the end point of charging, which can accurately determine the end point of the charging end point and stop further charging when the rechargeable battery unit is near full, avoiding insufficient charging of the rechargeable battery unit or being damaged by overcharging, thereby improving The problem of the above-mentioned conventional technology is solved by utilizing the power and improving the security.
本發明之主要目的在於提供一種充電結束點的判斷方法，是在定電流充電後的定電壓充電中進行，其中在定電壓充電時，充電電流會隨充電電池逐漸充飽而降低，因此本發明的判斷方法包括：利用電源輸入單元接收輸入電源，並經分壓及濾波處理而產生分壓電源及輸出電源，分別供應脈波寬度調變(Pulse Width Modulation，PWM)驅動控制器及切換電晶體；利用PWM驅動控制器產生PWM驅動信號，用以控制切換電晶體的切換動作，使得切換電晶體導 通及關閉而利用輸出電源以產生充電電流，且經由充電電感對充電電池單元進行充電操作，而充電電池單元是經感測電阻而接地，且感測電阻的跨壓為感測電壓；利用PWM驅動控制器接收感測電壓，並依據感測電壓而調節PWM驅動信號的工作寬度(duty)；利用PWM驅動控制器比較工作寬度以及預設寬度，並判斷目前的工作寬度是否低於預設寬度；以及如果工作寬度大於預設寬度，則持續產生PWM驅動信號以供應充電電流給充電電感，而如果工作寬度等或小低於預設寬度，則停止產生PWM驅動信號，藉以關閉切換電晶體而停止提供充電電流給充電電感，進而結束對充電電池單元的充電操作。 The main object of the present invention is to provide a method for determining a charging end point, which is performed in a constant voltage charging after constant current charging, wherein the charging current is reduced as the rechargeable battery is gradually charged during constant voltage charging, and thus the present invention The method for judging comprises: receiving input power by using a power input unit, and generating a voltage dividing power source and an output power source by dividing and filtering, respectively supplying a Pulse Width Modulation (PWM) driving controller and switching the transistor Using a PWM drive controller to generate a PWM drive signal for controlling the switching action of the switching transistor to switch the transistor guide Turning off and using the output power to generate a charging current, and charging the rechargeable battery unit via a charging inductor, the charging battery unit is grounded via the sensing resistor, and the voltage across the sensing resistor is a sensing voltage; using PWM The driving controller receives the sensing voltage, and adjusts a working width of the PWM driving signal according to the sensing voltage; compares the working width and the preset width by using the PWM driving controller, and determines whether the current working width is lower than a preset width And if the working width is greater than the preset width, continuously generating a PWM driving signal to supply a charging current to the charging inductor, and if the working width is equal to or smaller than the preset width, stopping generating the PWM driving signal, thereby turning off the switching transistor The charging current is stopped to supply the charging inductance, thereby ending the charging operation of the rechargeable battery unit.
因此，本發明的方法可在不需使用高靈敏度放大器下，便能利用PWM驅動控制器決定所產生的PWM信號之工作寬度是否低於預設寬度而精確判斷充電結束點的結束點，進而停止進一步充電，防止過度充電，不僅可大幅降低成本，還能提高抗雜訊能力，尤其是可大幅改善溫度的影響，增進整體充電操作的穩定性及可靠度。 Therefore, the method of the present invention can use the PWM driving controller to determine whether the working width of the generated PWM signal is lower than a preset width and accurately determine the end point of the charging end point without stopping the use of the high-sensitivity amplifier, thereby stopping Further charging to prevent overcharging not only greatly reduces the cost, but also improves the anti-noise ability, especially the effect of greatly improving the temperature and improving the stability and reliability of the overall charging operation.
10‧‧‧電源輸入單元 10‧‧‧Power input unit
20‧‧‧脈波寬度調變(PWM)驅動控制器 20‧‧‧ Pulse width modulation (PWM) drive controller
30‧‧‧切換電晶體 30‧‧‧Switching transistor
BT‧‧‧充電電池單元 BT‧‧‧Rechargeable battery unit
C‧‧‧濾波電容 C‧‧‧Filter Capacitor
I‧‧‧充電電流 I‧‧‧Charging current
IS‧‧‧感測電流 IS‧‧‧Sensing current
L‧‧‧充電電感 L‧‧‧Charging Inductor
RS‧‧‧感測電阻 RS‧‧‧ sense resistor
S10至S60‧‧‧步驟 S10 to S60‧‧‧ steps
Vin‧‧‧輸入電源 Vin‧‧‧Input power supply
VS‧‧‧感測電壓 VS‧‧‧Sensor voltage
S10‧‧‧利用電源輸入單元產生分壓電源及輸出電源 S10‧‧‧Using the power input unit to generate the voltage dividing power supply and the output power supply
S20‧‧‧利用脈衝寬度調變(PWM)驅動控制器產生PWM驅動信號 S20‧‧‧ Generate PWM drive signal using pulse width modulation (PWM) drive controller
S30‧‧‧利用PWM驅動信號控制切換電晶體以產生充電電流 S30‧‧‧Use PWM drive signal to control switching transistor to generate charging current
S40‧‧‧利用充電電感傳輸充電電流給充電電池 S40‧‧‧Use charging inductor to transmit charging current to rechargeable battery
S41‧‧‧利用充電電感及感測電阻傳輸充電電流給充電電池 S41‧‧‧Using the charging inductor and the sensing resistor to transfer the charging current to the rechargeable battery
S50‧‧‧利用PWM驅動控制器依據感測電壓以調節工作寬度 S50‧‧‧Using the PWM drive controller to adjust the working width according to the sensing voltage
S60‧‧‧利用PWM驅動控制器判斷該充電操作是否完成而結束充電操作 S60‧‧‧Use the PWM drive controller to judge whether the charging operation is completed and end the charging operation
第一圖顯示依據本發明第一實施例充電結束點的判斷方法的操作流程圖。 The first figure shows an operational flowchart of the judging method of the charging end point according to the first embodiment of the present invention.
第二圖顯示依據本發明第一實施例充電結束點的判斷方法的系統示意圖。 The second figure shows a system diagram of a method of judging a charging end point according to a first embodiment of the present invention.
第三圖顯示依據本發明第二實施例充電結束點的判斷方法的操作流程圖。 The third figure shows an operational flowchart of the judging method of the charging end point according to the second embodiment of the present invention.
第四圖顯示依據本發明第二實施例充電結束點的判斷方法的系統示意圖。 The fourth figure shows a system diagram of a method of judging a charging end point according to a second embodiment of the present invention.
以下配合圖式及元件符號對本發明之實施方式做更詳細的說明，俾使熟習該項技藝者在研讀本說明書後能據以實施。 The embodiments of the present invention will be described in more detail below with reference to the drawings and the <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt;
請同時參閱第一圖及第二圖，依據本發明第一實施例充電結束點的判斷方法的操作流程圖及系統示意圖。本發明的判斷方法主要是在定電流充電後的定電壓充電中判斷充電電池的充電結束點，藉以結束充電操作。充電電池整個充電操作係包括依序進行的定電流充電及定電壓充電，其中在定電壓充電時，充電電流會隨充電電池逐漸充飽而降低，而本發明的判斷方法係用以判斷充電電池在定電壓充電時的充電結束點。 Please refer to the first figure and the second figure at the same time, according to the operation flowchart and system diagram of the method for determining the charging end point according to the first embodiment of the present invention. The judging method of the present invention mainly determines the charging end point of the rechargeable battery in the constant voltage charging after the constant current charging, thereby ending the charging operation. The entire charging operation of the rechargeable battery includes constant current charging and constant voltage charging in sequence, wherein during constant voltage charging, the charging current is reduced as the rechargeable battery is gradually charged, and the determining method of the present invention is for judging the rechargeable battery. The end of charging at constant voltage charging.
具體而言，本發明的判斷方法是利用充電裝置對充電電池單元BT進行充電，而充電裝置可包括電源輸入單元10、切換電晶體30、脈波寬度調變(PWM)驅動控制器20、充電電感L及感測電阻RS。 Specifically, the determining method of the present invention is to charge the rechargeable battery unit BT by using a charging device, and the charging device may include a power input unit 10, a switching transistor 30, a pulse width modulation (PWM) driving controller 20, and charging. Inductor L and sense resistor RS.
上述的充電電池單元BT本質上並不是限於一單元充電電池單元，而是可包括由至少一單元充電電池單元經並聯及/或串聯連接組合而成一體的充電電池組。 The rechargeable battery unit BT described above is not limited to a unit rechargeable battery unit in nature, but may include a rechargeable battery pack that is integrated by at least one unit rechargeable battery unit in parallel and/or in series.
本發明第一實施例判斷充電結束點的充電方法是從步驟S10開始，主要是利用電源輸入單元10接收輸入電源Vin，比如市電、其他交流或直流電源，並經適當處理而產生分壓電源及輸出電源，比如分壓、濾波及/或整流處理。 The charging method for determining the charging end point in the first embodiment of the present invention starts from step S10, and mainly uses the power input unit 10 to receive an input power source Vin, such as a mains, other AC or DC power source, and generates a voltage dividing power source by appropriate processing. Output power, such as voltage divider, filtering, and/or rectification.
接著，進入步驟S20，利用脈波寬度調變(PWM)驅動控制器20接收來自電源輸入單元10的分壓電源，以當作供應電源，並產生PWM驅動信號。 Next, proceeding to step S20, the voltage division power supply from the power supply input unit 10 is received by the pulse width modulation (PWM) drive controller 20 to be supplied as a power supply, and a PWM drive signal is generated.
在步驟S30中，利用切換電晶體30接收來自電源輸入單元10的輸出電源，並由PWM驅動信號控制切換電晶體30的切換動作，進而利用輸出電源以產生充電電流I。具體而言，切換電晶體30可為功率電晶體，比如金氧半電晶體(MOS)，其中切換電晶體30的閘極連接至PWM驅動信號，因此，PWM驅動信號可控制切換電晶體30為導通或關閉，亦即使得輸出電源可經由切換電晶體30而以充電電流I的 形式傳送。 In step S30, the output power from the power supply input unit 10 is received by the switching transistor 30, and the switching operation of the switching transistor 30 is controlled by the PWM driving signal, and the output power is utilized to generate the charging current I. Specifically, the switching transistor 30 can be a power transistor, such as a metal oxide semi-transistor (MOS), wherein the gate of the switching transistor 30 is connected to the PWM driving signal, and therefore, the PWM driving signal can control the switching transistor 30 to Turning on or off, that is, making the output power source charge the current I via switching the transistor 30 Form transfer.
然後在步驟S40中，利用充電電感L電氣連接至切換電晶體30以接收充電電流I，並利用充電電流I對電氣連接至充電電感L的充電電池單元BT進行充電操作。此外，充電電池單元BT是經感測電阻RS而接地，且流過感測電阻RS的感測電流IS會在感測電阻RS上產生感測電壓VS，亦即感測電阻RS的一端為接地，而感測電阻RS的另一端連接至充電電池單元BT，因此感測電阻RS的另一端之電壓即為感測電壓VS。 Then, in step S40, the charging transistor L is electrically connected to the switching transistor 30 to receive the charging current I, and the charging current I is used to charge the rechargeable battery unit BT electrically connected to the charging inductor L. In addition, the rechargeable battery unit BT is grounded via the sensing resistor RS, and the sensing current IS flowing through the sensing resistor RS generates a sensing voltage VS on the sensing resistor RS, that is, one end of the sensing resistor RS is grounded. And the other end of the sensing resistor RS is connected to the rechargeable battery unit BT, so the voltage of the other end of the sensing resistor RS is the sensing voltage VS.
進入步驟S50，利用PWM驅動控制器20接收感測電壓VS，並依據感測電壓VS以調節PWM驅動信號的工作寬度，因而對充電電流I形成反饋控制迴路，達到穩定充電電流I的目的。具體而言，感測電壓VS愈小時，表示感測電流IS過低，亦即充電電流I過低，因此PWM驅動控制器20需要增加工作寬度，藉以提高充電電流I，反之亦然。 Proceeding to step S50, the PWM driving controller 20 receives the sensing voltage VS and adjusts the working width of the PWM driving signal according to the sensing voltage VS, thereby forming a feedback control loop for the charging current I to achieve the purpose of stabilizing the charging current I. Specifically, the smaller the sensing voltage VS, indicating that the sensing current IS is too low, that is, the charging current I is too low, so the PWM driving controller 20 needs to increase the working width, thereby increasing the charging current I, and vice versa.
最後執行步驟S60，利用PWM驅動控制器20比較PWM驅動信號的工作寬度以及預設寬度，以判斷充電電池單元BT是否已經充飽，或是否達到充電操作的充電結束點而停止充電操作，以完成整個充電操作。較佳的，預設寬度可設定為PWM驅動信號的工作週期的5%至0.2%之間的任一數值，比如工作週期的2%。 Finally, step S60 is executed to compare the working width of the PWM driving signal and the preset width by the PWM driving controller 20 to determine whether the rechargeable battery unit BT is fully charged, or whether the charging end point of the charging operation is reached and the charging operation is stopped to complete The entire charging operation. Preferably, the preset width can be set to any value between 5% and 0.2% of the duty cycle of the PWM drive signal, such as 2% of the duty cycle.
具體而言，如果工作寬度大於預設寬度，則還未達到充電結束點，且PWM驅動控制器20持續產生PWM驅動信號，使得切換電晶體30提供充電電流I而對充電電池單元BT充電。另一情形是，如果工作寬度等於或小於預設寬度，則達到充電結束點，且PWM驅動控制器20停止產生PWM驅動信號，或將PWM驅動信號的工作寬度設定為零，藉以關閉切換電晶體30而停止提供充電電流I給充電電感L，亦即結束對充電電池單元BT的充電操作。 Specifically, if the working width is greater than the preset width, the charging end point has not been reached, and the PWM driving controller 20 continues to generate the PWM driving signal, so that the switching transistor 30 supplies the charging current I to charge the rechargeable battery unit BT. In another case, if the working width is equal to or smaller than the preset width, the charging end point is reached, and the PWM driving controller 20 stops generating the PWM driving signal, or sets the working width of the PWM driving signal to zero, thereby turning off the switching transistor. 30, the supply of the charging current I to the charging inductance L is stopped, that is, the charging operation of the rechargeable battery unit BT is ended.
上述的PWM驅動控制器20可由微處理器(MCU)而實現，藉以執行特定的韌體程式而控制整個充電操作的流程。此外，為進一步改善充電電流I的電氣品質，比如濾除雜訊，可如第二圖所示，利用濾波電容C將充電電感L及充電電池單元BT的串接點連接至接地。 The PWM drive controller 20 described above can be implemented by a microprocessor (MCU) to control the flow of the entire charging operation by executing a specific firmware program. In addition, in order to further improve the electrical quality of the charging current I, such as filtering out noise, as shown in the second figure, the charging capacitor C and the series connection point of the rechargeable battery unit BT are connected to the ground by the filter capacitor C.
此外，進一步參閱第三圖及第四圖，分別為本發明第二實施例充電結束點的判斷方法的操作流程圖及系統示意圖，其中第二實施例是類似於第一實施例，其主要的差異在於第二實施例的步驟S41是利用串接的充電電感L及感測電阻RS以傳輸充電電流J給充電電池單元而充電，如第三圖及第四圖所示，亦即第一實施例及第二實施例是使用不同連接方式的回饋控制路徑。具體而言，在第二實施例的步驟S41中，感測電阻RS是連接至充電電感L以及充電電池單元BT之間，此時，感測電阻RS的端電壓即為所需的感測電壓VS，而在第一實施例的步驟S40中，感測電阻RS是連接至充電電池單元BT以及接地之間。 In addition, referring to the third and fourth figures, respectively, it is an operation flowchart and a system diagram of a method for determining a charging end point according to a second embodiment of the present invention, wherein the second embodiment is similar to the first embodiment, and the main The difference is that the step S41 of the second embodiment is to charge the rechargeable battery unit by using the series connected charging inductor L and the sensing resistor RS to transmit the charging current J, as shown in the third and fourth figures, that is, the first implementation. The example and the second embodiment are feedback control paths using different connection methods. Specifically, in step S41 of the second embodiment, the sensing resistor RS is connected between the charging inductor L and the rechargeable battery unit BT. At this time, the terminal voltage of the sensing resistor RS is the required sensing voltage. VS, and in step S40 of the first embodiment, the sensing resistor RS is connected between the rechargeable battery unit BT and the ground.
由於第二實施例的其餘操作處理步驟係如同第一實施例，在此不再贅述。 Since the remaining operational processing steps of the second embodiment are like the first embodiment, they are not described herein again.
要注意的是，進一步，還可如第四圖所示，利用濾波電容C將充電電感L及感測電阻RS的串接點連接至接地，藉以改善充電電流I對充電電池單元BT的充電品質。 It should be noted that, further, as shown in the fourth figure, the series connection point of the charging inductor L and the sensing resistor RS is connected to the ground by using the filter capacitor C, thereby improving the charging quality of the charging battery unit BT by the charging current I. .
此外，為進一步改善充電電流I的電氣品質，比如濾除雜訊，可如第二圖所示，利用濾波電容將充電電感L及充電電池單元BT的串接點連接至接地。 In addition, in order to further improve the electrical quality of the charging current I, such as filtering out noise, as shown in the second figure, the charging capacitor L and the series connection point of the rechargeable battery unit BT are connected to the ground using a filter capacitor.
綜上所述，本發明的特點在於不使用類比硬體方式而是利用數位處理方式，以判斷充電電池單元的充飽程度，因此，不需高靈敏度且易受干擾的類比放大器，而可直接利用數位運作的PWM驅動控制器依據PWM驅動信號的工作週期，便能精確判斷充電電池單元是否充飽，進而決定充電 操作的結束點。因此，本發明不僅可大幅簡化電路設計以及實體佈局，同時還能降低製作成本，尤其是PWM驅動控制器本身為數位電路，因此可提高抗雜訊能力，改善充電結束點的精確度，增進整體充電操作的穩定性及可靠度。 In summary, the present invention is characterized in that instead of using an analog hardware method, a digital processing method is used to determine the degree of fullness of the rechargeable battery unit. Therefore, an analog amplifier that is highly sensitive and susceptible to interference is not required, but can be directly The digitally operated PWM drive controller can accurately determine whether the rechargeable battery unit is fully charged according to the duty cycle of the PWM drive signal, thereby determining the charging. The end point of the operation. Therefore, the present invention not only greatly simplifies the circuit design and the physical layout, but also reduces the manufacturing cost, especially the PWM drive controller itself is a digital circuit, thereby improving the anti-noise capability, improving the accuracy of the charging end point, and improving the overall Stability and reliability of the charging operation.
以上所述者僅為用以解釋本發明之較佳實施例，並非企圖據以對本發明做任何形式上之限制，是以，凡有在相同之發明精神下所作有關本發明之任何修飾或變更，皆仍應包括在本發明意圖保護之範疇。 The above is only a preferred embodiment for explaining the present invention, and is not intended to limit the present invention in any way, and any modifications or alterations to the present invention made in the spirit of the same invention. All should still be included in the scope of the intention of the present invention.
S10‧‧‧利用電源輸入單元產生分壓電源及輸出電源 S10‧‧‧Using the power input unit to generate the voltage dividing power supply and the output power supply
S20‧‧‧利用脈衝寬度調變(PWM)驅動控制器產生PWM驅動信號 S20‧‧‧ Generate PWM drive signal using pulse width modulation (PWM) drive controller
S30‧‧‧利用PWM驅動信號控制切換電晶體以產生充電電流 S30‧‧‧Use PWM drive signal to control switching transistor to generate charging current
S40‧‧‧利用充電電感傳輸充電電流給充電電池 S40‧‧‧Use charging inductor to transmit charging current to rechargeable battery
S50‧‧‧利用PWM驅動控制器依據感測電壓以調節工作寬度 S50‧‧‧Using the PWM drive controller to adjust the working width according to the sensing voltage
S60‧‧‧利用PWM驅動控制器判斷該充電操作是否完成而結束充電操作 S60‧‧‧Use the PWM drive controller to judge whether the charging operation is completed and end the charging operation
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| CA2038160C (en) * | 1991-03-13 | 1996-10-22 | Jiri K. Nor | Charging circuits for rechargeable batteries and cells |
| US5376875A (en) * | 1993-12-03 | 1994-12-27 | Motorola, Inc. | Battery charger status monitor circuit and method therefor |
| TWI403071B (en) * | 2010-04-21 | 2013-07-21 | Dynapack Internat Technology Corp | A charging method for a rechargeable battery and a charging device |
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