201220644 六、發明說明： 【發明所屬之技術領域】 本發明是有關於一種電池供電系統與控制方法，特別 是指一種具適應性充電機制的雙電池供電系統與控制方 法。 【先前技術】 隨著科技的發展與綠色能源的要求，電動車輛（Electric Vehicle)已漸漸地被引進車輛市場以取代傳統使用石油之引 擎車輛。一般而言，在電動車輛内之用電裝置，除了電動 馬達外，尚有頭燈、尾燈、方向燈、停車指示燈、喇叭與 内建音響等，而在電動車輛内之電池模組，通常以鋰離子 電池作為主要儲能單元，錯酸電池作為次要儲能單元。所 以’如果電池模組的供電運作與充電運作沒有適應性地調 配控制’則經離子電池與船酸電池的額定儲能容量就無法 做最有效的運用。 【發明内容】 因此，本發明之目的，即在提供一種具適應性充電機 制的雙電池供電系統，供電給一主要負載及一次要負載。 於是’本發明雙電池供電系統包含一交流/直流轉換 器、一電連接於該交流/直流轉換器的主要儲能單元、一電 連接於該交流/直流轉換器及該主要儲能單元的直流/直流轉 換器、一電連接於該直流/直流轉換器的次要儲能單元，及 一電連接於該直流/直流轉換器、該交流/直流轉換器、該主 要儲能單元與該次要儲能單元的控制器。 201220644 外部電源提供的一交流電壓轉 該交流/直流轉換器將一外部電 換為一第一直流電壓。 該主要儲能單元是供電給該主要負載 。於該外部電源201220644 VI. Description of the Invention: [Technical Field] The present invention relates to a battery power supply system and control method, and more particularly to a dual battery power supply system and control method with an adaptive charging mechanism. [Prior Art] With the development of technology and the demand for green energy, Electric Vehicle has gradually been introduced into the vehicle market to replace the conventional oil-using vehicle. In general, in the electric vehicle, in addition to the electric motor, there are headlights, taillights, directional lights, parking lights, speakers and built-in audio, etc., and battery modules in electric vehicles, usually The lithium ion battery is used as the main energy storage unit, and the wrong acid battery is used as the secondary energy storage unit. Therefore, if the power supply operation of the battery module and the charging operation are not adaptively adjusted, the rated energy storage capacity of the ion battery and the ship acid battery cannot be used most effectively. SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a dual battery power supply system with an adaptive charging mechanism that supplies power to a primary load and a primary load. Thus, the dual battery power supply system of the present invention comprises an AC/DC converter, a main energy storage unit electrically connected to the AC/DC converter, a DC electrically connected to the AC/DC converter and the main energy storage unit. a DC converter, a secondary energy storage unit electrically coupled to the DC/DC converter, and an electrical connection to the DC/DC converter, the AC/DC converter, the primary energy storage unit, and the secondary Controller for the energy storage unit. 201220644 An AC voltage supply from an external power supply The AC/DC converter converts an external power to a first DC voltage. The primary energy storage unit is powered to the primary load. On the external power supply
第一直流電Μ轉換為一第二直流電壓。 供電 流轉 該次要儲能單元是供電給該次要負載。於該直流/直流 轉換器根據該控制信號之致能運作將該第__直流電壓轉換 為該第二直流電壓時，該次要儲能單元利用該直流/直流轉 換器輸出之該第二直流電壓進行充電。 該控制器是偵測該次要儲能單元之殘電量與該主要儲 能單兀之殘電量，並偵測該交流/直流轉換器是處於一閒置 狀態或一作用狀態，據以提供該控制信號。 本發明之另一目的，即在提供一種具適應性充電機制 的雙電池供電控制方法。 於是’本發明雙電池供電控制方法包含：偵測該交流/ 直流轉換器是處於一閒置狀態或一作用狀態，據以產生一 第一偵測結果；偵測該次要儲能單元之殘電量以產生一第 二偵測結果；以及根據該第一偵測結果與該第二偵測結果 以決疋疋否要致能該直流/直流轉換器，據以利用一外部電 源之電能或該主要儲能單元之殘電量來充電該次要儲能單 本發明之功效在於，藉由該控制器偵測該次要儲能單 201220644 元之殘電量，並偵測該交流/直流轉換器是處於該閒置狀態 或該作用狀態’該控制器可適應性地致能/禁能該直流/直流 轉換器之轉換運作，用來控制充電運作’進而控制對該主 要負載與該次要負載的供電運作，據以將該次要儲能單元 與該主要儲能單元的額定儲能容量做最有效的運用，故確 實能達成本發明之目的。 【實施方式】 有關本發明之前述及其他技術内容、特點與功效，在The first direct current is converted into a second direct current voltage. Power Flow The secondary energy storage unit supplies power to the secondary load. And when the DC/DC converter converts the first __DC voltage into the second DC voltage according to the enabling operation of the control signal, the secondary energy storage unit outputs the second DC by using the DC/DC converter The voltage is charged. The controller detects the residual power of the secondary energy storage unit and the residual power of the primary energy storage unit, and detects that the AC/DC converter is in an idle state or an active state, thereby providing the control signal. Another object of the present invention is to provide a dual battery power supply control method with an adaptive charging mechanism. Therefore, the dual battery power supply control method of the present invention includes: detecting that the AC/DC converter is in an idle state or an active state, thereby generating a first detection result; detecting a residual power of the secondary energy storage unit Generating a second detection result; and determining whether to enable the DC/DC converter according to the first detection result and the second detection result, thereby utilizing an external power source or the main The residual energy of the energy storage unit is used to charge the secondary energy storage. The effect of the invention is that the controller detects the residual energy of the secondary energy storage unit 201220644 and detects that the AC/DC converter is in The idle state or the active state 'the controller adaptively enables/disables the switching operation of the DC/DC converter to control the charging operation' and thereby controls the power supply operation of the primary load and the secondary load According to the most efficient use of the secondary energy storage unit and the rated energy storage capacity of the main energy storage unit, the object of the present invention can be achieved. [Embodiment] The foregoing and other technical contents, features and effects of the present invention are
以下配合參考圖式之較佳實施例的詳細說明中，將可清楚 的呈現。 參閱圖1，本發明雙電池供電系統100之較佳實施例包 含一交流/直流轉換器11〇、一電連接於交流/直流轉換器 110之主要儲能單元12〇、一電連接於交流/直流轉換器ιι〇 之直流/直流轉換器130、一電連接於直流/直流轉換器13〇 之次要儲能單元140，及一電連接於直流/直流轉換器13〇、 交流/直流轉換器110、主要儲能單元12〇與次要儲能單元 140之控制器15〇。雙電池供電系統1〇〇可供電給一主要負 載160及一次要負載170。 要儲能單元120包括至少一鋰離子電池。次要儲能 單元140包括至少一鉛酸電池。若雙電池供電系統⑽： 設於-電動車輛内，則主要負載16()包括―用來帶動車輛 之電動馬達，而次要負冑17〇包括至少一頭燈、至少一尾 燈、至少一方向燈、至少一停車指示燈，及一喇叭等 裝置。 201220644 一=流/直流轉換E lw是用來將一外部電源刚提供的 乂流電塵轉換為一第一 12。是用來供電主要二二電壓如。主要儲能單元 泣 要負載i60。於外部電源180供電交流/直 、器110時，主要儲能單元120利用交流/直流轉換器 輸出之第一直流電壓Vdcl進行充電。 爪/直流轉換器13〇是用來根據一控制信號&之致能 運作將第-直流電M Vdcl轉換為一第二直帽觀。 或者’直流/直流轉換g 13〇根據控制信號&之禁能 (Disable)運作以停止執行電壓轉換。 古次要儲能單元⑽是用來供電次要負冑17〇。於直流/ 直流轉換器130根據控制信號Sc之致能運作將第一直流電 壓Vdcl轉換為第二直流電壓Vdc2時，次要儲能單元刚 利用直ml/直流轉換器130輸出之第二直流電壓V(jc2進行充 電。 控制器150疋用來偵測主要儲能單元12〇之殘電量與 次要儲能單元U0之殘電量，並偵測交流/直流轉換器u〇 是處於一作用狀態或一間置狀態，據以提供控制信號Sc， 作用狀態即可判斷為如圖1的「外接充電模式」，閒置狀態 即可判斷為如圖2的「自行充電模式」。 如圖1是「外接充電模式」，若控制器15〇偵測次要儲 能單元140之殘電量小於一第一充電臨界值，則控制器15〇 供具致能狀態之控制k號Sc以致能直流/直流轉換器 130，將第一直流電壓Vdcl轉換為第二直流電壓Vdc2，據 以充電次要儲能單元140。 201220644 於交流/直流轉換器110處於作用狀態時，若控制器 iso偵測次要儲能單元140之殘電量大於_第一停充臨界 值，則控制器15〇提供具禁能狀態之控制㈣&以禁能直 流/直流轉換器130,據以停止充電次要儲能單元14〇，如此 可避免次要儲能單it 140 #生過充現象而減損其使用壽 命。 參閱圖2,「自行充電模式」下，若控制器15〇债測主 要儲能單it 120之殘電量大於一免充臨界值，且次要儲能 單元140之殘電量小於一第二充電臨界值，則控制器15〇 提供具致能狀態之控制信號Sc以致能直流/直流轉換器 130，將主要儲能單元120約為第一直流電壓Vdci之一直 流輸出電壓轉換為第二直流電壓Vdc2，據以充電次要儲能 單元140。 於交流/直流轉換器110處於閒置狀態時，若控制器 150偵測主要儲能單元12〇之殘電量小於免充臨界值，則控 制器150提供具禁能狀態之控制信號&以禁能直流/直流轉 換器130,據以停止充電次要儲能單元14〇，如此可將主要 儲能單元120之殘電量均用來供電主要負載丨6〇。 於交流/直流轉換器11〇處於閒置狀態時，若控制器 150偵測次要儲能單元14〇之殘電量大於一第二停充臨界 值，則控制器150提供具禁能狀態之控制信號託以禁能直 流/直流轉換器uo,據以停止充電次要儲能單元14〇，如此 可避免次要儲能單元14〇發生過充現象而減損其使用壽 命。 201220644 免充臨界值是對應於主要儲能單元120之額定儲能容 量的一第一預設百分比值，本實施例為1〇%，代表主要儲 畲b單元120本身的剩餘電力已不足，因此不供電給次要儲 能單元140充電。 第一/第二充電臨界值是分別對應於「外接充電模 式」/「自行充電模式」的次要儲能單元14〇之額定儲能 今量的一第二預設百分比值，本實施例分別為95%及 ，需注意的是，如本實施例的第二充電臨界值5〇%低於 第一充電臨界值95%，也就是在「自行充電模式」下，次 要儲能單元140之殘電量如果足夠就無須充電，如此可避 免主要儲能單元120消耗過多的電力供應給次要儲能單元 140 ° 第一/第二停充臨界值是對應於「外接充電模式」/ 「自行充電模式」的次要儲能單元14〇之額定儲能容量的 咼於該第二預設百分比值之一第三預設百分比值，本實施 例分別為100%及70%，需注意的是，如本.實施例的第二停 充臨界值70%低於第一停充臨界值1〇〇%，也就是在「自行 充電模式」下，次要儲能單元14〇充電至一定程度之殘電 量就無須再充滿，如此可避免主要儲能單元12〇消耗過多 的電力供應給次要儲能單元140 ;又第一預設百分比值、第 二預設百分比值與第三預設百分比值可為内定值或用戶設 定值，不以本實施例所提數值為限制。 參閱圖3，本發明雙電池供電系統10〇的供電控制方法 之較佳實施例透過流程200說明如下。 201220644 於供電控制器15〇後（步驟S210)，控制$ i5〇偵測交 流/直流轉換器110是否處於作用狀態(步驟s2i5);當交产/ 直流轉換g m處於作用狀態時判斷為「外接充電模式」從 當交流/直流轉換器no處於閒置狀態時判斷為「」 模式」。 电 配合圖1及圖4，在外接夺雷;I替T- 隹汴按兄電模式下，控制器150偵測 次要儲能單元140之殘電量是否]、μ势._ . β < π电里疋Φ小於第一充電臨界值（步驟The detailed description of the preferred embodiments with reference to the drawings will be clearly described below. Referring to FIG. 1, a preferred embodiment of the dual battery power supply system 100 of the present invention includes an AC/DC converter 11A, a main energy storage unit 12 electrically connected to the AC/DC converter 110, and an electrical connection to the AC/ a direct current converter DC/DC converter 130, a secondary energy storage unit 140 electrically connected to the DC/DC converter 13〇, and an electrical connection to the DC/DC converter 13〇, AC/DC converter 110. The main energy storage unit 12 is connected to the controller 15 of the secondary energy storage unit 140. The dual battery powered system can supply a primary load 160 and a primary load 170. The energy storage unit 120 includes at least one lithium ion battery. The secondary energy storage unit 140 includes at least one lead acid battery. If the dual battery power supply system (10): is located in an electric vehicle, the main load 16 () includes the "electric motor used to drive the vehicle, and the secondary load 17" includes at least one headlight, at least one tail light, at least one direction light. At least one parking indicator light, and a speaker and other devices. 201220644 A = flow / DC conversion E lw is used to convert the turbulent electric dust just provided by an external power supply into a first 12 . It is used to supply the main two or two voltages. The main energy storage unit is crying to load the i60. When the external power source 180 supplies the AC/DC device 110, the main energy storage unit 120 is charged by the first DC voltage Vdcl output from the AC/DC converter. The claw/DC converter 13 is used to convert the first direct current M Vdcl into a second straight cap according to a control signal & Or 'DC/DC conversion g 13〇 operates according to the disable signal of the control signal & to stop the voltage conversion. The ancient secondary energy storage unit (10) is used to supply a secondary load of 17 〇. When the DC/DC converter 130 converts the first DC voltage Vdcl into the second DC voltage Vdc2 according to the control signal Sc, the secondary energy storage unit immediately uses the second DC voltage output by the DC/DC converter 130. V (jc2 is charged. The controller 150 is used to detect the residual power of the main energy storage unit 12〇 and the residual energy of the secondary energy storage unit U0, and detect that the AC/DC converter is in a state of action or In a set state, according to the control signal Sc, the action state can be determined as the "external charging mode" of FIG. 1, and the idle state can be determined as the "self-charging mode" of FIG. 2. As shown in FIG. In the charging mode, if the controller 15 detects that the residual energy of the secondary energy storage unit 140 is less than a first charging threshold, the controller 15 provides the control k-number of the enabling state to enable the DC/DC converter. 130, converting the first DC voltage Vdcl into a second DC voltage Vdc2, thereby charging the secondary energy storage unit 140. 201220644 When the AC/DC converter 110 is in the active state, if the controller iso detects the secondary energy storage unit 140 residual power If it is greater than the _ first stop charging threshold, the controller 15 provides a control (4) & disables the DC/DC converter 130 to stop charging the secondary energy storage unit 14 〇, thus avoiding secondary The energy storage single 140# is overcharged and depletes its service life. Referring to Figure 2, under the “self-charging mode”, if the controller 15 measures the residual energy of the main energy storage unit it 120 is greater than a no-charge threshold, And the residual energy of the secondary energy storage unit 140 is less than a second charging threshold, the controller 15 provides a control signal Sc with an enabled state to enable the DC/DC converter 130, and the primary energy storage unit 120 is approximately A DC output voltage of a DC voltage Vdci is converted into a second DC voltage Vdc2 to charge the secondary energy storage unit 140. When the AC/DC converter 110 is in an idle state, if the controller 150 detects the primary energy storage unit 12 If the residual power is less than the charge-free threshold, the controller 150 provides a control signal & disables the DC/DC converter 130, thereby stopping charging the secondary energy storage unit 14〇, thus Residual energy storage unit 120 The amount is used to supply the main load 丨6〇. When the AC/DC converter 11〇 is in an idle state, if the controller 150 detects that the residual energy of the secondary energy storage unit 14〇 is greater than a second stop charging threshold, then The controller 150 provides a control signal with a disabled state to disable the DC/DC converter uo, thereby stopping charging the secondary energy storage unit 14〇, so that the secondary energy storage unit 14 is prevented from being overcharged and degraded. The service charge is 201220644. The charge-free threshold is a first predetermined percentage value corresponding to the rated energy storage capacity of the main energy storage unit 120. In this embodiment, it is 1%, representing the surplus power of the main storage unit b itself 120. It is insufficient, so no power is supplied to the secondary energy storage unit 140. The first/second charging threshold is a second predetermined percentage value of the rated energy storage amount of the secondary energy storage unit 14 对应 corresponding to the “external charging mode”/“self-charging mode”, respectively. 95% and, it should be noted that, as in the embodiment, the second charging threshold value of 5〇% is lower than the first charging threshold value of 95%, that is, in the “self-charging mode”, the secondary energy storage unit 140 If the residual power is sufficient, there is no need to charge, so that the main energy storage unit 120 can be prevented from consuming excessive power supply to the secondary energy storage unit 140 °. The first/second stop charging threshold corresponds to "external charging mode" / "self-charging" The mode of the secondary energy storage unit 14 is equal to the third predetermined percentage value of the second predetermined percentage value, which is 100% and 70% respectively. It should be noted that For example, the second stoppage threshold of the embodiment is 70% lower than the first stoppage threshold of 1%, that is, in the "self-charging mode", the secondary energy storage unit 14 is charged to a certain degree. The power does not need to be refilled, so the main energy storage unit 1 can be avoided. 2) consuming excessive power supply to the secondary energy storage unit 140; the first preset percentage value, the second preset percentage value, and the third preset percentage value may be default values or user set values, not in this embodiment The value mentioned is a limit. Referring to Fig. 3, a preferred embodiment of the power supply control method for the dual battery power supply system 10 of the present invention is described below through the flow 200. 201220644 After the power supply controller 15 (step S210), control $i5〇 to detect whether the AC/DC converter 110 is in the active state (step s2i5); when the exchange/DC conversion gm is in the active state, it is determined as "external charging" The mode is judged to be "" mode when the AC/DC converter no is idle. In conjunction with FIG. 1 and FIG. 4, in the external lightning recovery; I for the T-隹汴 in the brother mode, the controller 150 detects whether the residual energy of the secondary energy storage unit 140], μ potential._. β < π 疋 Φ is smaller than the first charging threshold (step
S220)，本實施例為95%;若次要儲能單元14〇之殘電量小 於第-充電臨界值，則致能直流/直流轉換_ 13〇利用外部 電源180之電能以充電次要儲能單元14〇(步驟s225)，否則 $月b直抓/直流轉換器13〇以停止充電次要儲能單元14〇(步 驟S295)。虽致忐直流/直流轉換器1以充電次要儲能單元 140後，控制器150偵測次要儲能單元丨4〇之殘電量是否大 於第一停充臨界值（步驟S230)，本實施例為1〇〇%;若次要 儲能單元140之殘電量大於第一停充臨界值，則禁能直流/ 直流轉換器130以停止充電次要儲能單元14〇(步驟S295)， 否則繼續利用外部電源180之電能以充電次要儲能單元 140(步驟 S225)。 配合圖2及圖5，在自行充電模式下，交流/直流轉換 器110不作用，控制器丨5〇偵測主要儲能單元12〇之殘電量 疋否大於免充臨界值（步驟S250)，本實施例為1〇% ;若主 要儲能單元120之殘電量不大於免充臨界值，則禁能直流/ 直流轉換器130以停止充電次要儲能單元14〇(步驟S295)。 當主要儲能單元12〇之殘電量大於免充臨界值時，控制器 201220644 150偵測次要儲能單元14〇之殘電量是否小於第二充電臨界 值（步驟S255);若次要儲能單元140之殘電量小於第二充 電臨界值，在本實施例為50%，則致能直流/直流轉換器 130利用主要儲能單元12〇之殘電量以充電次要儲能單元 140(步驟S260)，否則禁能直流/直流轉換器13〇以停止充電 次要儲能單元140(步驟S295)。 §致此直流/直流轉換器130利用主要儲能單元12〇之 殘電量以充電次要儲能單元14〇後，控制器15〇偵測次要 儲能單元140之殘電量是否大於第二停充臨界值（步驟 S265)，在本實施例為7〇%，並偵測主要儲能單元12〇之殘 電量是否大於免充臨界值（步驟S270);若次要儲能單元14〇 之殘電量大於第二停充臨界值或主要儲能單元12〇之殘電 量不大於免充臨界值，則禁能直流/直流轉換器13〇以停止 充電次要儲能單元140(步驟S295)，否則繼續利用主要儲能 單元120之殘電量以充電次要儲能單元14〇(步驟S26〇)。 綜上所述，在本發明雙電池供電系統1〇〇的運作中， 藉由控制器150偵測次要儲能單元14〇之殘電量與主要儲 能皁元120之殘電量，並偵測交流/直流轉換器11〇是處於 閒置狀態或作用狀態，控制器150可適應性地致能/禁能直 w·/直流轉換器130之轉換運作，用來控制充電運作，進而 控制對主要負載160與次要負載17〇的供電運作，據以將 次要儲能單元140與主要儲能單元12〇的殘電量做最有效 的運用’故確實能達成本發明之目的。 惟以上所述者，僅為本發明之較佳實施例而已，當不 201220644 能以此限定本發明實施之範圍，即大凡依本發明申請專利 範圍及發明說明内容所作之簡單的等效變化與修部f皆仍 屬本發明專利涵蓋之範圍内。 【圖式簡單說明】 圖1是一功能方塊不意圖，說明本發明雙電池供電系 統之較佳實施例處於外接充電模式； 圖2是一功能方塊示意圖，說明本發明雙電池供電系 統之較佳實施例處於自行充電模式； 圖3是一流程圖，說明上述雙電池供電控制方法之較 佳實施例； 圖4是一時序示意圖，說明本發明雙電池供電方法處 於外接充電模式之供電狀態；及 圖5是一時序示意圖，說明本發明雙電地供電方法處 於自行充電模式之供電狀態。 201220644 【主要元件符號說明】 100 ···. •…雙電池供電系統 150 ... •…控制器 110 ···' …父流/直流轉換器 160… •…主要負載 120 .... •…主要儲能單元 170… •…次要負載 130… …直流/直流轉換器 180… •…外部電源 140… •…次要儲能單元 200… •…流程S220), this embodiment is 95%; if the residual energy of the secondary energy storage unit 14 is less than the first charging threshold, the DC/DC conversion is enabled _ 13 〇 using the power of the external power source 180 to charge the secondary energy storage The unit 14 is (step s225), otherwise the $b b straight/DC converter 13 is stopped to stop charging the secondary energy storage unit 14 (step S295). After the DC/DC converter 1 is charged to charge the secondary energy storage unit 140, the controller 150 detects whether the residual energy of the secondary energy storage unit 大于4〇 is greater than the first shutdown threshold (step S230), and the implementation For example, if the residual capacity of the secondary energy storage unit 140 is greater than the first shutdown threshold, the DC/DC converter 130 is disabled to stop charging the secondary energy storage unit 14 (step S295), otherwise The power of the external power source 180 is continuously utilized to charge the secondary energy storage unit 140 (step S225). 2 and FIG. 5, in the self-charging mode, the AC/DC converter 110 does not function, and the controller 丨5〇 detects whether the residual energy of the main energy storage unit 12〇 is greater than the no-charge threshold (step S250). In this embodiment, it is 1〇%; if the residual power of the main energy storage unit 120 is not greater than the charge-free threshold, the DC/DC converter 130 is disabled to stop charging the secondary energy storage unit 14 (step S295). When the residual energy of the main energy storage unit 12 is greater than the no charge threshold, the controller 201220644 150 detects whether the residual energy of the secondary energy storage unit 14 is less than the second charging threshold (step S255); if the secondary energy storage The residual power of the unit 140 is less than the second charging threshold. In this embodiment, 50%, the enabling DC/DC converter 130 utilizes the residual power of the main energy storage unit 12 to charge the secondary energy storage unit 140 (step S260). Otherwise, the DC/DC converter 13 is disabled to stop charging the secondary energy storage unit 140 (step S295). ??? After the DC/DC converter 130 utilizes the residual power of the main energy storage unit 12 to charge the secondary energy storage unit 14 , the controller 15 detects whether the residual energy of the secondary energy storage unit 140 is greater than the second stop. The threshold value is filled (step S265), which is 7〇% in the present embodiment, and detects whether the residual energy of the main energy storage unit 12〇 is greater than the no-charge threshold (step S270); if the secondary energy storage unit 14 is disabled If the amount of power is greater than the second stop-charging threshold or the residual energy of the main energy storage unit 12〇 is not greater than the charge-free threshold, the DC/DC converter 13〇 is disabled to stop charging the secondary energy storage unit 140 (step S295), otherwise The residual power of the main energy storage unit 120 is continuously utilized to charge the secondary energy storage unit 14 (step S26 〇). In summary, in the operation of the dual-battery power supply system of the present invention, the controller 150 detects the residual power of the secondary energy storage unit 14 and the residual energy of the main energy storage soap element 120, and detects The AC/DC converter 11 is in an idle state or an active state, and the controller 150 can adaptively enable/disable the switching operation of the direct w/DC converter 130 to control the charging operation and thereby control the main load. The power supply operation of 160 and the secondary load of 17 , is based on the use of the residual energy of the secondary energy storage unit 140 and the main energy storage unit 12 ', so that the object of the present invention can be achieved. The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited to 201220644, that is, the simple equivalent change of the patent application scope and the description of the invention is The repair parts f are still within the scope of the patent of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a functional block not intended to illustrate a preferred embodiment of the dual battery power supply system of the present invention in an external charging mode; FIG. 2 is a functional block diagram illustrating a preferred dual battery power supply system of the present invention. The embodiment is in a self-charging mode; FIG. 3 is a flow chart illustrating a preferred embodiment of the dual battery power supply control method; FIG. 4 is a timing diagram illustrating the power supply state of the dual battery power supply method of the present invention in an external charging mode; FIG. 5 is a timing diagram illustrating the power supply state of the dual power supply method of the present invention in a self-charging mode. 201220644 [Description of main component symbols] 100 ···. •...Dual battery power supply system 150 ... •...controller 110 ···' ...parent/DC converter 160... •...main load 120 .... ...main energy storage unit 170... •...minor load 130...DC/DC converter 180... •...External power supply 140...•...Secondary energy storage unit 200... •...flow
S 12S 12