TWI635301B - Method of accurately displaying battery percentage using multiple judging conditions and related battery management unit - Google Patents
Method of accurately displaying battery percentage using multiple judging conditions and related battery management unit Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
採用多個判飽條件以精準顯示電量之方法包含偵測電池組之操作溫度、充電電流和充電電壓。當依據操作溫度和充電電壓判定電池組符合一第一高溫判飽條件時、當依據操作溫度、充電電壓和充電電流判定電池組符合一第二高溫判飽條件時，或是當依據充電電壓和充電電流判定電池組符合一常溫判飽條件時，指示顯示模組將所顯示之相對荷電狀態在預定時間內逐漸提升至100%。The method of using multiple judgment conditions to accurately display the power includes detecting the operating temperature, charging current and charging voltage of the battery pack. When it is determined that the battery pack meets a first high-temperature full-saturation condition based on the operating temperature and charging voltage, when it is determined that the battery pack meets a second high-temperature full-saturation condition based on the operating temperature, charging voltage, and charging current, or when the charging voltage and When the charging current determines that the battery pack meets a normal temperature condition, it instructs the display module to gradually increase the displayed relative state of charge to 100% within a predetermined time.
Description
本發明相關於一種顯示電量之方法及相關電池管理單元，尤指一種採用多個判飽條件以精準顯示電量之方法及相關電池管理單元。The invention relates to a method for displaying the electric quantity and a related battery management unit, in particular to a method for accurately displaying the electric quantity using a plurality of saturation conditions and a related battery management unit.
鋰電池具有高能量密度、高操作電壓、使用溫度範圍大、無記憶效應、壽命長，以及高充放電次數等優點，已廣泛地被用以提供電力，例如用於手機、筆記型電腦或數位相機等可攜式電子產品。同時，針對近年來電動車的蓬勃發展，使用磷酸鋰鐵(LiFePO 4)為正極材料之鋰電池具高安全性、平穩的電壓平台輸出、快速充電能力、可瞬間大電流放電、長使用壽命、高能量密度，以及符合綠色能源要求對環境不污染等特色，因此成為電動車動力來源的首選。 Lithium batteries have the advantages of high energy density, high operating voltage, wide operating temperature range, no memory effect, long life, and high charge and discharge times. They have been widely used to provide electricity, such as mobile phones, notebook computers or digital Portable electronic products such as cameras. At the same time, in view of the vigorous development of electric vehicles in recent years, lithium batteries using lithium iron phosphate (LiFePO 4 ) as the positive electrode material have high safety, stable voltage platform output, fast charging capability, instantaneous large current discharge, long service life, high The energy density and the characteristics of meeting the requirements of green energy and no pollution to the environment have made it the first choice for electric vehicles.
由於電動車與穿戴攜帶式電子產品相比之下，電動車所使用的電芯數目遠多於穿戴攜帶式電子產品好幾千倍，因此在利潤取向下所以很多一線電芯廠都將產能移往電動車，其它穿戴攜帶式電子產品所需的產能則由二線電芯廠來填補。在規格方面最主要的差異是在電池充電電壓的部份，一線電芯廠的充電電壓在允許的溫度範圍內是以定電壓充電，而二線電芯廠因考量電池特性的問題，所以在允許充電範圍中，大部份都是在溫度達到45度以上時需要做降電壓充電的動作，不過這也影響到了系統電池指示器的電量顯示。Compared with wearable and portable electronic products, electric vehicles use thousands of times more batteries than wearable and portable electronic products. Therefore, under the profit orientation, many first-line battery manufacturers have shifted their production capacity. For electric vehicles, the capacity required for other wearable and portable electronic products is filled by second-line battery manufacturers. The main difference in the specifications is in the battery charging voltage. The charging voltage of the first-line battery factory is charged at a fixed voltage within the allowable temperature range. The second-line battery factory considers the characteristics of the battery. In the allowable charging range, most of them need to do the step-down charging when the temperature reaches above 45 degrees, but this also affects the power display of the system battery indicator.
在競技筆電的應用中，筆記型電腦之變壓器多半會長時間插著電，而許多使用者亦習慣一邊將手機插入交流電源一邊操作手機。在高效能的運作下，系統溫度的提升也會讓電池的操作溫度越來越高。假設現在使用者的系統尚未充飽電，使用情境又在重負載的狀況下進行充電，系統若是採用上述二線電池芯的話就會讓使用者看到明明充電器插著卻一直無法飽充的情形。In the application of competitive notebook computers, the transformer of the notebook computer is mostly plugged in for a long time, and many users are also used to operate the mobile phone while plugging the mobile phone into an AC power source. Under high-efficiency operation, the increase in system temperature will make the operating temperature of the battery higher and higher. Assuming that the user's system is not fully charged, and the charging situation is under a heavy load, the system will use the above two-line battery core to let the user see that the charger is plugged in but has not been fully charged. situation.
第1圖為先前技術中採用二線電池芯之系統運作時的示意圖。由上至下依序為二線電池芯之相對荷電狀態(relative state-of-charge, RSOC)、充電電壓，操作溫度和充放電電流之波形圖。假設先前技術之二線電池芯之規格為當溫度在45℃以下需以4.4V來充電，而當溫度在45℃以上時需降壓以4.2V來充電。如第1圖所示，當二線電池芯之操作溫度超過45℃時，此時二線電池芯之充電電壓為4.2V，滿充電時RSOC的部份就會停留在4.2V所對應大約80%之處。直到二線電池芯之操作溫度低於45℃時，充電電壓才會變回4.4V，滿充電時電池電量RSOC才會顯示為100%。FIG. 1 is a schematic diagram of a prior art system using a two-wire battery cell during operation. From top to bottom are the waveform diagrams of the relative state-of-charge (RSOC), charging voltage, operating temperature and charge-discharge current of the two-wire battery cell in order. Assume that the specification of the second-line battery cell in the prior art is that when the temperature is below 45 ° C, it needs to be charged with 4.4V, and when the temperature is above 45 ° C, it needs to be stepped down and charged with 4.2V. As shown in Figure 1, when the operating temperature of the second-wire battery cell exceeds 45 ° C, the charging voltage of the second-wire battery cell is 4.2V at this time, and the RSOC part will stay at 4.2V corresponding to about 80 when fully charged. % Place. The charging voltage will not return to 4.4V until the operating temperature of the second-line battery core is lower than 45 ° C, and the battery charge RSOC will show 100% when fully charged.
因此，當採用二線電池芯之系統在尚未充飽電且在重負載運作的狀況下進行充電，使用者可能會看到明明充電器插著卻一直無法飽充的情形，進而造成困擾。因此，需要一種能精準顯示電量之電池管理單元。Therefore, when a system using a two-wire battery cell is charged before it is fully charged and under heavy load operation, the user may see a situation where the charger is plugged in but cannot be fully charged, which may cause trouble. Therefore, there is a need for a battery management unit that can accurately display power.
本發明提供一種採用多個判飽條件以精準顯示電量之方法，其包含偵測一電池組之一操作溫度以回報相對應之一溫度資訊；偵測該電池組之一充電電流以回報相對應之一電流資訊；偵測該電池組之一充電電壓以回報相對應之一電壓資訊；當依據該溫度資訊和該電壓資訊判定該電池組符合一第一高溫判飽條件時，指示一顯示模組將所顯示之一相對荷電狀態在一預定時間內逐漸提升至100%；以及當依據該電池組之該溫度資訊、該電壓資訊和該電流資訊判定該電池組符合一第二高溫判飽條件時，指示該顯示模組將所顯示之該相對荷電狀態在該預定時間內逐漸提升至100%。其中，該電池組包含一個或多個可充電電池，在該操作溫度未超過一臨界溫度時係以一第一電壓充電該一個或多個可充電電池，在該操作溫度超過該臨界溫度時係以一第二電壓充電該一個或多個可充電電池，在該充電電流低於一中止充電電流時停止充電該一個或多個可充電電池，且該第一電壓高於該第二電壓。The invention provides a method for accurately displaying power by using multiple conditions for determining saturation, which includes detecting an operating temperature of a battery pack to report corresponding temperature information; detecting a charging current of the battery pack to report corresponding A current information; detecting a charging voltage of the battery pack to return a corresponding voltage information; when it is determined that the battery pack meets a first high-temperature saturation condition based on the temperature information and the voltage information, a display mode is indicated The group gradually increases the displayed relative state of charge to 100% within a predetermined time; and when the temperature information, the voltage information, and the current information of the battery pack are used to determine that the battery pack meets a second high-temperature saturation condition When instructing the display module to gradually increase the displayed relative state of charge to 100% within the predetermined time. Wherein the battery pack includes one or more rechargeable batteries, the one or more rechargeable batteries are charged with a first voltage when the operating temperature does not exceed a critical temperature, and when the operating temperature exceeds the critical temperature Charging the one or more rechargeable batteries with a second voltage, stopping charging the one or more rechargeable batteries when the charging current is lower than a suspension charging current, and the first voltage is higher than the second voltage.
本發明另提供一種採用多個判飽條件以精準顯示電量之電池管理單元，其包含一電池組，其包含一個或多個可充電電池；一溫度偵測單元，用來偵測該電池組之一操作溫度以回報相對應之一溫度資訊；一電流偵測單元，用來偵測該電池組之一充電電流以回報相對應之一電流資訊；一電壓偵測單元，用來偵測該電池組之一充電電壓以回報相對應之一電壓資訊；一顯示模組，用來顯示該電池組之一相對荷電狀態；以及一微控制器，耦接至該溫度偵測單元、該電流偵測單元和該電壓偵測單元以分別接收該溫度資訊、該電流資訊和該電壓資訊。該微控制器用來當依據該溫度資訊和該電壓資訊判定該電池組符合一第一高溫判飽條件時，指示該顯示模組將所顯示之該相對荷電狀態在一預定時間內逐漸提升至100%；以及當依據該電池組之該溫度資訊、該電壓資訊和該電流資訊判定該電池組符合一第二高溫判飽條件時，指示顯示模組將所顯示之該相對荷電狀態在該預定時間內逐漸提升至100%。其中，在該操作溫度未超過一臨界溫度時係以一第一電壓充電該一個或多個可充電電池，在該操作溫度超過該臨界溫度時係以一第二電壓充電該一個或多個可充電電池，在該充電電流低於一中止充電電流時停止充電該一個或多個可充電電池，且該第一電壓高於該第二電壓。The invention also provides a battery management unit adopting multiple judgment conditions to accurately display the power, which includes a battery pack including one or more rechargeable batteries; and a temperature detection unit for detecting the battery pack An operating temperature to report corresponding temperature information; a current detection unit to detect a charging current of the battery pack to report a corresponding current information; and a voltage detection unit to detect the battery Charging voltage of one of the groups to report the corresponding voltage information; a display module for displaying the relative state of charge of the battery pack; and a microcontroller, coupled to the temperature detection unit and the current detection The unit and the voltage detection unit respectively receive the temperature information, the current information and the voltage information. The microcontroller is used to instruct the display module to gradually increase the displayed relative state of charge to 100 within a predetermined time when it is determined that the battery pack meets a first high-temperature saturation condition based on the temperature information and the voltage information %; And when it is determined that the battery pack meets a second high temperature saturation condition based on the temperature information, the voltage information and the current information of the battery pack, instruct the display module to display the relative state of charge displayed at the predetermined time The internal gradually increased to 100%. Wherein, when the operating temperature does not exceed a critical temperature, the one or more rechargeable batteries are charged with a first voltage, and when the operating temperature exceeds the critical temperature, the one or more rechargeable batteries are charged with a second voltage. The rechargeable battery stops charging the one or more rechargeable batteries when the charging current is lower than a suspension charging current, and the first voltage is higher than the second voltage.
第2圖為本發明實施例中一種採用多個判飽條件以精準顯示電量之電池管理單元(battery management unit, BMU)100的功能方塊圖。電池管理單元100包含一電池組10、一微控制器(microcontroller unit, MCU)20、一溫度偵測單元30、一電流偵測單元40、一電壓偵測單元50，以及一顯示模組60。FIG. 2 is a functional block diagram of a battery management unit (BMU) 100 that uses multiple saturation conditions to accurately display power in an embodiment of the present invention. The battery management unit 100 includes a battery pack 10, a microcontroller unit (MCU) 20, a temperature detection unit 30, a current detection unit 40, a voltage detection unit 50, and a display module 60.
在本發明中，電池組10可包含複數個串接之可充電電池，例如鋰電池。本發明之電池組10採用二線電池芯，亦即在允許充電的溫度範圍內會依據溫度採用不同充電電壓。如下列表一所示，在溫度介於0~15℃的第一狀態下，首先採用916mA之電流充電至4.4V，接著充電電壓維持在4.4V，而中止充電電流(end-of-charge current)為229mA；在溫度介於15~45℃的第二狀態下，首先採用2290mA之電流充電至4.4V，接著充電電壓維持在4.4V，而中止充電電流為229mA；在溫度介於45~60℃的第三狀態下，首先採用2290mA之電流充電至4.2V，接著充電電壓維持在4.2V，而中止充電電流為229mA。然而，表一所示之二線電池芯規格僅為本發明之實施例，並不限定本發明之範疇。 <TABLE border="1" borderColor="#000000" width="85%"><TBODY><tr><td> 操作溫度(℃) </td><td> 第一階段 </td><td> 第二階段 </td><td> 中止充電電流 </td></tr><tr><td> 0~15 </td><td> 916mA定電流充電至4.4V </td><td> 充電電壓維持在4.4V </td><td> 229mA </td></tr><tr><td> 15~45 </td><td> 2290mA定電流充電至4.4V </td><td> 充電電壓維持在4.4V </td><td> 229mA </td></tr><tr><td> 45~60 </td><td> 2290mA定電流充電至4.2V </td><td> 充電電壓維持在4.2V </td><td> 229mA </td></tr></TBODY></TABLE>表一 In the present invention, the battery pack 10 may include a plurality of rechargeable batteries connected in series, such as a lithium battery. The battery pack 10 of the present invention uses a two-wire battery cell, that is, different charging voltages are used according to the temperature within the allowable charging temperature range. As shown in Table 1 below, in the first state with a temperature between 0 and 15 ° C, first charge to 4.4V with a current of 916mA, then the charging voltage is maintained at 4.4V, and the end-of-charge current is terminated 229mA; in the second state with a temperature between 15 and 45 ° C, first charge with 2290mA to 4.4V, then the charging voltage is maintained at 4.4V, and the charging current is 229mA; the temperature is between 45 and 60 ° C In the third state, the current is first charged to 4.2V with a current of 2290mA, then the charging voltage is maintained at 4.2V, and the charging current is 229mA. However, the specifications of the two-wire battery cells shown in Table 1 are only examples of the present invention and do not limit the scope of the present invention. <TABLE border = "1" borderColor = "# 000000" width = "85%"> <TBODY> <tr> <td> Operating temperature (℃) </ td> <td> First stage </ td> <td > Second stage </ td> <td> Charging current suspension </ td> </ tr> <tr> <td> 0 ~ 15 </ td> <td> 916mA constant current charging to 4.4V </ td> < td> The charging voltage is maintained at 4.4V </ td> <td> 229mA </ td> </ tr> <tr> <td> 15 ~ 45 </ td> <td> 2290mA constant current charging to 4.4V </ td > <td> The charging voltage is maintained at 4.4V </ td> <td> 229mA </ td> </ tr> <tr> <td> 45 ~ 60 </ td> <td> 2290mA constant current charge to 4.2V < / td> <td> The charging voltage is maintained at 4.2V </ td> <td> 229mA </ td> </ tr> </ TBODY> </ TABLE> Table 1
在本發明之電池管理單元100中，溫度偵測單元30用來偵測電池組10之操作溫度，並回報相對應之溫度資訊S1至微控制器20。電流偵測單元40用來偵測電池組10之充電電流，並回報相對應之電流資訊S2至微控制器20。電壓偵測單元50用來偵測電池組10之充電電壓，並回報相對應之電壓資訊S3至微控制器20。微控制器20再依據溫度資訊S1、電流資訊S2和電壓資訊S3來控制顯示模組60所顯示之電量(RSOC)。In the battery management unit 100 of the present invention, the temperature detection unit 30 is used to detect the operating temperature of the battery pack 10 and report the corresponding temperature information S1 to the microcontroller 20. The current detection unit 40 is used to detect the charging current of the battery pack 10 and report the corresponding current information S2 to the microcontroller 20. The voltage detection unit 50 is used to detect the charging voltage of the battery pack 10 and report the corresponding voltage information S3 to the microcontroller 20. The microcontroller 20 then controls the power (RSOC) displayed by the display module 60 according to the temperature information S1, the current information S2, and the voltage information S3.
在本發明一實施例中，溫度偵測單元30、電流偵測單元40和電壓偵測單元50可為獨立元件。在本發明另一實施例中，溫度偵測單元30、電流偵測單元40或電壓偵測單元50可整合至微控制器20。然而，溫度偵測單元30、電流偵測單元40和電壓偵測單元50之實施方式並不限定本發明之範疇。In an embodiment of the invention, the temperature detection unit 30, the current detection unit 40 and the voltage detection unit 50 may be independent components. In another embodiment of the invention, the temperature detection unit 30, the current detection unit 40 or the voltage detection unit 50 can be integrated into the microcontroller 20. However, the embodiments of the temperature detection unit 30, the current detection unit 40, and the voltage detection unit 50 do not limit the scope of the present invention.
第3圖為本發明實施例中電池管理單元100運作時之流程圖，其包含下列步驟：FIG. 3 is a flowchart of the operation of the battery management unit 100 in the embodiment of the present invention, which includes the following steps:
步驟310： 開始。Step 310: Start.
步驟320： 判斷電池組10之操作溫度是否超過一臨界溫度；若是，執行步驟330；若否，執行步驟360。Step 320: Determine whether the operating temperature of the battery pack 10 exceeds a critical temperature; if yes, go to step 330; if not, go to step 360.
步驟330： 判斷電池組10之充電電壓是否超過一預定電壓；若是，執行步驟340；若否，執行步驟350。Step 330: Determine whether the charging voltage of the battery pack 10 exceeds a predetermined voltage; if yes, go to step 340; if not, go to step 350.
步驟340： 當依據電池組10之操作溫度和充電電壓判定符合一第一高溫判飽條件時，將顯示模組60所顯示之RSOC在一預定時間內逐漸提升至100%。Step 340: When it is determined that a first high-temperature full-saturation condition is satisfied according to the operating temperature and charging voltage of the battery pack 10, the RSOC displayed by the display module 60 is gradually increased to 100% within a predetermined time.
步驟350： 當依據電池組10之操作溫度、充電電壓和充電電流判定符合一第二高溫判飽條件時，將顯示模組60所顯示之RSOC在一預定時間內逐漸提升至100%。Step 350: When it is determined according to the operating temperature, charging voltage and charging current of the battery pack 10 that a second high-temperature full-saturation condition is satisfied, the RSOC displayed by the display module 60 is gradually increased to 100% within a predetermined time.
步驟360： 當依據電池組10之充電電壓和充電電流判定符合一常溫判飽條件時，將顯示模組60所顯示之RSOC在一預定時間內逐漸提升至100%。Step 360: When it is determined according to the charging voltage and charging current of the battery pack 10 that a full-temperature judgment condition is satisfied, the RSOC displayed by the display module 60 is gradually increased to 100% within a predetermined time.
在步驟320中，微控制器20可依據溫度偵測單元30提供之溫度資訊S1來得知目前電池組10之操作溫度。臨界溫度可依據電池組10之特性來決定，例如在表一的實施例中，臨界溫度可設為45℃。依據表一所示之規格，當電池組10之操作溫度未超過45℃時應使用較高充電電壓(4.4V)，而當電池組10之操作溫度超過45℃時應使用較低充電電壓(4.2V)，如此可確保電池組10維持其運作特性。值得注意的是，表一所示實施例僅為了說明目的，並不限定本發明之範疇。In step 320, the microcontroller 20 can obtain the current operating temperature of the battery pack 10 according to the temperature information S1 provided by the temperature detection unit 30. The critical temperature can be determined according to the characteristics of the battery pack 10. For example, in the embodiment of Table 1, the critical temperature can be set to 45 ° C. According to the specifications shown in Table 1, a higher charging voltage (4.4V) should be used when the operating temperature of the battery pack 10 does not exceed 45 ° C, and a lower charging voltage should be used when the operating temperature of the battery pack 10 exceeds 45 ° C ( 4.2V), so as to ensure that the battery pack 10 maintains its operating characteristics. It should be noted that the embodiment shown in Table 1 is for illustrative purposes only, and does not limit the scope of the present invention.
在步驟330中，微控制器20可依據電壓偵測單元50所提供之電壓資訊S3來得知目前電池組10之充電電壓。預定電壓可依據電池組10之特性來決定，例如在表一的實施例中，預定電壓可設為4.2V℃。步驟330的目的在於當電池組10在高溫狀態(例如45~60℃)下運作時，判斷其充電電壓之值是否超過規格中要求的較低充電電壓(4.2V)。In step 330, the microcontroller 20 can obtain the current charging voltage of the battery pack 10 according to the voltage information S3 provided by the voltage detection unit 50. The predetermined voltage may be determined according to the characteristics of the battery pack 10. For example, in the embodiment of Table 1, the predetermined voltage may be set to 4.2V ° C. The purpose of step 330 is to determine whether the value of the charging voltage exceeds the lower charging voltage (4.2V) required by the specifications when the battery pack 10 is operated at a high temperature (eg, 45-60 ° C).
當在步驟320和330中判定電池組10之操作溫度超過臨界溫度且充電電壓超過預定電壓時，本發明會執行步驟340以依據電池組10之操作溫度和充電電壓來判斷是否符合第一高溫判飽條件。例如在表一的實施例中，當電池組10之操作溫度高於45℃且充電電壓大於4.2V時，此時可判定符合第一高溫判飽條件。第一高溫判飽條件是考量到系統在原始充電電壓4.4V接近充飽時，在操作溫度突然超過45度需降壓的狀況下，同時考量操作溫度和充電電壓的判飽機制。When it is determined in steps 320 and 330 that the operating temperature of the battery pack 10 exceeds the critical temperature and the charging voltage exceeds the predetermined voltage, the present invention performs step 340 to determine whether the first high temperature judgment is met according to the operating temperature and charging voltage of the battery pack 10 Full condition. For example, in the embodiment of Table 1, when the operating temperature of the battery pack 10 is higher than 45 ° C and the charging voltage is higher than 4.2V, it may be determined that the first high-temperature full-saturation condition is met. The first high-temperature full-sufficiency condition is to consider the system's full-saturation mechanism when the original charging voltage of 4.4V is close to full-charge, and the operating temperature suddenly exceeds 45 degrees when the voltage needs to be reduced.
當在步驟320和330中判定電池組10之操作溫度超過臨界溫度但充電電壓並未超過預定電壓時，本發明會執行步驟350以依據電池組10之操作溫度、充電電壓和充電電流是否符合第二高溫判飽條件，其中微控制器20可依據電流偵測單元40所提供之電流資訊S2來得知目前電池組10之充電電流。例如在表一的實施例中，當電池組10之操作溫度高於45℃、充電電壓大於4.1V且充電電流小於229mA時，此時可判定符合第二高溫判飽條件。第二高溫判飽條件是針對系統在高溫狀態運作一段時間時，同時考量操作溫度、充電電壓和充電電流(規格中的中止充電電流)的判飽機制。When it is determined in steps 320 and 330 that the operating temperature of the battery pack 10 exceeds the critical temperature but the charging voltage does not exceed the predetermined voltage, the present invention performs step 350 to determine whether the operating temperature, charging voltage and charging current of the battery pack 10 Two high-temperature conditions for determining saturation, in which the microcontroller 20 can obtain the current charging current of the battery pack 10 according to the current information S2 provided by the current detection unit 40. For example, in the embodiment of Table 1, when the operating temperature of the battery pack 10 is higher than 45 ° C., the charging voltage is greater than 4.1 V, and the charging current is less than 229 mA, it may be determined that the second high-temperature saturation condition is met. The second high-temperature full-satisfaction condition is a full-sufficiency determination mechanism that considers the operating temperature, charging voltage, and charging current (discharging charging current in the specifications) when the system is operated at a high temperature for a period of time.
當在步驟320中判定電池組10之操作溫度並未超過臨界溫度時，本發明會執行步驟360以依據電池組10之充電電壓和充電電流來判斷是否符合常溫判飽條件。例如在表一的實施例中，當電池組10之充電電壓大於4.3V且充電電流小於229mA時，此時可判定符合常溫判飽條件。常溫判飽條件是針對系統在常溫狀態下時，同時考量充電電壓和充電電流(規格中的中止充電電流)的判飽機制。When it is determined in step 320 that the operating temperature of the battery pack 10 does not exceed the critical temperature, the present invention performs step 360 to determine whether it satisfies the normal temperature judgment condition according to the charging voltage and the charging current of the battery pack 10. For example, in the embodiment of Table 1, when the charging voltage of the battery pack 10 is greater than 4.3V and the charging current is less than 229mA, it can be determined that the condition for determining saturation at normal temperature is met. The normal temperature full-sufficiency condition is a full-sufficiency determination mechanism that considers the charging voltage and the charging current (abort charging current in the specifications) at the same time when the system is in the normal temperature state.
當在步驟340、350或360中判定符合第一高溫判飽條件、第二高溫判飽條件或常溫判飽條件時，本發明可執行步驟370以將顯示模組60所顯示之RSOC在預定時間內逐漸提升至100%。When it is determined in step 340, 350, or 360 that the first high-temperature full-saturation condition, the second high-temperature full-saturation condition, or the normal temperature full-saturation condition is met, the present invention can perform step 370 to set the RSOC displayed by the display module 60 for a predetermined time The internal gradually increased to 100%.
第4圖為本發明實施例中電池管理單元100運作時之示意圖。由上至下依序為電池組10之RSOC、充電電壓，操作溫度和充放電電流之波形圖。在時間點T1之前和時間點T2之後採用常溫判飽條件來判斷，而在時間點T1和T2之間採用第一高溫判飽條件或第二高溫判飽條件來判斷。FIG. 4 is a schematic diagram of the battery management unit 100 in the embodiment of the present invention. From top to bottom, the waveform charts of the RSOC, charging voltage, operating temperature, and charge and discharge current of the battery pack 10 are in order. Before the time point T1 and after the time point T2, the normal temperature judgment condition is used for judgment, and between the time points T1 and T2, the first high temperature judgment condition or the second high temperature judgment condition is used for judgment.
綜上所述，本發明提供一種依據操作溫度、充電電壓和充電電流來判飽之電池管理單元。當電池管理單元在常溫下運作時，依據電池組10之充電電壓和充電電流來判斷是否符合常溫判飽條件；當電池管理單元在高溫下以較高充電電壓運作時，依據電池組10之操作溫度和充電電壓來判斷是否符合第一高溫判飽條件；當電池管理單元在高溫下以較低充電電壓運作時，依據電池組10之操作溫度、充電電壓和充電電壓來判斷是否符合第二高溫判飽條件。因此，當採用二線電池芯之系統之飽充顯示可以達到100%的判飽條件，而不會被降壓後的電壓限制而讓使用者誤以為未充飽電。 以上所述僅為本發明之較佳實施例，凡依本發明申請專利範圍所做之均等變化與修飾，皆應屬本發明之涵蓋範圍。In summary, the present invention provides a battery management unit that judges fullness based on operating temperature, charging voltage and charging current. When the battery management unit is operating at normal temperature, it is judged whether it satisfies the normal temperature judgment condition according to the charging voltage and charging current of the battery pack 10; when the battery management unit is operating at a higher charging voltage at high temperature, it is based on the operation of the battery pack 10 Temperature and charging voltage to determine whether it meets the first high-temperature full-saturation condition; when the battery management unit operates at a lower charging voltage at high temperature, it determines whether it meets the second high temperature according to the operating temperature, charging voltage and charging voltage of the battery pack 10 Sufficiency conditions. Therefore, the full-charge display of a system using a two-wire battery cell can reach 100% full-saturation conditions, without being limited by the voltage after the buck, which makes the user mistakenly believe that it is not fully charged. The above are only the preferred embodiments of the present invention, and all changes and modifications made in accordance with the scope of the patent application of the present invention shall fall within the scope of the present invention.
10‧‧‧電池組
20‧‧‧MCU
30‧‧‧溫度偵測單元
40‧‧‧電流偵測單元
50‧‧‧電壓偵測單元
60‧‧‧顯示模組
100‧‧‧電池管理單元
310~360‧‧‧步驟
S1‧‧‧溫度資訊
S2‧‧‧電流資訊
S3‧‧‧電壓資訊10‧‧‧ battery pack
20‧‧‧MCU
30‧‧‧Temperature detection unit
40‧‧‧current detection unit
50‧‧‧Voltage detection unit
60‧‧‧Display module
100‧‧‧ battery management unit
310 ~ 360‧‧‧Step
S1‧‧‧Temperature Information
S2‧‧‧Current Information
S3‧‧‧Voltage Information
第1圖為先前技術中採用二線電池芯之系統運作時的示意圖。 第2圖為本發明實施例中一種採用多個判飽條件以精準顯示電量之電池管理單元的功能方塊圖。 第3圖為本發明實施例中電池管理單元運作時之流程圖。 第4圖為本發明實施例中電池管理單元運作時之示意圖。FIG. 1 is a schematic diagram of a prior art system using a two-wire battery cell during operation. FIG. 2 is a functional block diagram of a battery management unit that uses multiple judgment conditions to accurately display power according to an embodiment of the present invention. FIG. 3 is a flowchart of the operation of the battery management unit in the embodiment of the present invention. FIG. 4 is a schematic diagram of the battery management unit in the embodiment of the present invention.
Claims (10)
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