1233228 玖、發明說明： 【發明所屬之技術領域】 本發明，係有關可重複充放電之二次電池，特#係有 關可解除過充電狀態之二次電池。 【先前技術】 習知，二次電池係廣泛地使用於行動電話或可攜式個 人電腦等。 第2圖之符號101係表示相關技術之二次電池，蓄電 裝置111的内部端子a、b係分別連接於輸出端子ιΐ4、 115,當直流電壓源118連接於輸出端子ιΐ4、ιΐ5時，蓄 電裝置111會被直流電壓源' 118充電，當負載連接於輸出 端子114、115時，藉由蓄電裝置lu的放電，而將電力供 應至負載。 在蓄電裝置111的内部端子a與輸出端子114之間， 插入串聯的二個熔絲121、122，當過電流通過時，至少一 方的熔絲121、122會熔斷，而使蓄電裝置U1與輸出端子 114切斷。 在二個熔絲12卜122彼此所連接的連接點c連接加熱 電路123的-端。X，該加熱電路123的另一端係透過開 關元件126而連接於蓄電裝置lu的内部端子b(未與熔絲 121連接）。 ...... 控制電路125係連接於開關元件126，利用由控制電 路125輸入之外部信號來使開關元件126進行導通^斷開 之切換。 1233228 在此’例如當與輸出端子114、115連接的直流電壓源 118輸出較限定的電壓為高時，充電裝置111會呈過充電 狀態。 控制電路125係用來檢測充電裝置U1的充電電壓， 當檢測結果顯示過充電的情況時，則使開關元件126導通 ’使來自蓄電裝置1丨1的電流通過熔絲121與加熱電路 123 ’而使加熱電路123發熱。 熔絲121、122係藉加熱電路123的發熱而熔斷，當與 蓄電裝置ill連接的熔絲12ι熔斷時，則蓄電裝置U1會 與輸出端子114切斷，俾使蓄電裝置lu不致於充電達額 定的電壓以上。 然而，在上述相關技術之二次電池1 〇丨，無法解除蓄 電裝置111的過充電狀態，而會有發生不良情況之虞。 對此，在第3圖所示之二次電池1 02，係設成可解除 過充電狀態者。 该二次電池102’係在與上述二次電池1〇1之蓄電裝 置1Π側的熔絲121呈短路後相同的狀態，加熱電路123 的一端係與蓄電裝置111的内部端子a串聯。 當蓄電裝置111呈過充電狀態，開關元件丨26導通時 ’與上述二次電池101同樣地，藉由加熱電路丨23的發熱 而使熔絲121熔斷，並使蓄電裝置Hi與輸出端子114切 斷。 進而，在該二次電池102，由於蓄電裝置lu的内部 端子a、b係透過加熱電路123與開關元件126而短路，因 1233228 此’蓄電裝置111的放電電流通過加熱電路丨23與開關元 件126 ’而解除蓄電裝置m的過充電狀態。 然而’近年來，蓄電裝置11丨的容量提高，使得須長 時間使大放電電流流通。由於加熱電路123的電阻值小， 因此，在上述構成的二次電池丨〇2，若持續使來自大容量 的蓄電裝置111的大放電電流流通，則會發生基板受損或 二次電池1 0 2熔融的危險性。 為了解除該危險性，雖考慮到將電阻串聯插入於加熱 電路123 ’惟’在此情形，蓄電裝置j j j的放電電流會變 小，會有無法確保使熔絲122熔斷的發熱量之虞。 近年來，對於可攜式個人電腦的小型化與長時間化的 要求與曰倶增，使得蓄電裝£ lu也更大容量化，因而導 致上述問題更加嚴重。 本發明係用以解決上述相關技術的不良情況而為者， 其目的係提供可安全地解除過充電狀態之二次電池。 【發明内容】 為解決上述問題，本發明 "哲〜 *發明之-次電池，係具有：蓄電 端子； ^關几件、帛一、第二輸出 隹孩畜電裝置之第 一）邓峒于之中，第 一炼絲而連接於該第-輪出端子； §直&電壓源連接於該第一、1233228 发明 Description of the invention: [Technical field to which the invention belongs] The present invention relates to a secondary battery that can be repeatedly charged and discharged. The special # relates to a secondary battery that can be overcharged. [Prior art] It is known that secondary batteries are widely used in mobile phones or portable personal computers. Reference numeral 101 in FIG. 2 indicates a related art secondary battery. The internal terminals a and b of the power storage device 111 are connected to the output terminals ιΐ4 and 115, respectively. When the DC voltage source 118 is connected to the output terminals ιΐ4 and ιΐ5, the power storage device 111 is charged by the DC voltage source '118. When the load is connected to the output terminals 114, 115, power is supplied to the load by discharging the power storage device lu. Between the internal terminal a and the output terminal 114 of the power storage device 111, two fuses 121 and 122 connected in series are inserted. When an overcurrent is passed, at least one of the fuses 121 and 122 is blown, so that the power storage device U1 and the output The terminal 114 is cut. At the connection point c to which the two fuses 12 and 122 are connected to each other, the-terminal of the heating circuit 123 is connected. X. The other end of the heating circuit 123 is connected to the internal terminal b (not connected to the fuse 121) of the power storage device lu through the switching element 126. The control circuit 125 is connected to the switching element 126, and uses an external signal input from the control circuit 125 to switch the switching element 126 on and off. 1233228 Here, for example, when the output of the DC voltage source 118 connected to the output terminals 114 and 115 is higher than a limited voltage, the charging device 111 will be in an overcharged state. The control circuit 125 is used to detect the charging voltage of the charging device U1. When the detection result shows an overcharge condition, the switching element 126 is turned on to 'allow the current from the power storage device 1 丨 1 to pass through the fuse 121 and the heating circuit 123' and The heating circuit 123 is caused to generate heat. The fuses 121 and 122 are fused by the heating of the heating circuit 123. When the fuse 12m connected to the power storage device ill is blown, the power storage device U1 is cut off from the output terminal 114, so that the power storage device lu does not charge up to the rated level. Above the voltage. However, in the above-mentioned related art secondary battery 100, the overcharged state of the power storage device 111 cannot be released, and there is a possibility that a malfunction may occur. For this reason, the secondary battery 102 shown in Fig. 3 is provided so that the overcharge state can be released. This secondary battery 102 'is in the same state as the fuse 121 on the power storage device 1Π side of the above-mentioned secondary battery 101, and one end of the heating circuit 123 is connected in series with the internal terminal a of the power storage device 111. When the power storage device 111 is in an overcharged state and the switching element 丨 26 is on, as in the above-mentioned secondary battery 101, the fuse 121 is blown by the heat generated by the heating circuit 23 and the power storage device Hi is cut off from the output terminal 114 Off. Furthermore, in the secondary battery 102, the internal terminals a and b of the power storage device lu are short-circuited through the heating circuit 123 and the switching element 126, because 1233228 the discharge current of the power storage device 111 passes through the heating circuit 23 and the switching element 126 'And the overcharge state of the power storage device m is released. However, in recent years, the capacity of the power storage device 11 has increased, so that a large discharge current must be passed for a long time. Since the resistance value of the heating circuit 123 is small, if the large-discharge current from the large-capacity power storage device 111 continues to flow in the secondary battery configured as described above, the substrate may be damaged or the secondary battery 10 may be damaged. 2 Risk of melting. In order to eliminate this danger, it is considered that a resistor is connected in series to the heating circuit 123. However, in this case, the discharge current of the power storage device j j j may be reduced, and there may be a risk that the amount of heat generated to blow the fuse 122 may not be secured. In recent years, the demand for miniaturization and prolongation of portable personal computers has increased, which has increased the capacity of power storage equipment, which has led to the above problems. The present invention is intended to solve the above-mentioned disadvantages of related technologies, and an object thereof is to provide a secondary battery that can safely release an overcharged state. [Summary of the Invention] In order to solve the above problems, the present invention " Philosophy ~ * The secondary battery of the present invention has: a power storage terminal; ^ several pieces, one, the second output (the first of a baby electric device) Among them, the first wire is connected to the first-round output terminal; § a & voltage source is connected to the first,
蓄電#晉合拉ά #古士 弟一輸出端子間，則言I 畜冤哀置會糟由该直流電壓 載連接於該第一、第—於^輪出的電流而充電，當負 第-輸出端子間，則該蓄電裝置的放電 1233228 電流會供應至該負载； 該第-炼絲連接於該第一輸出端子的部分係連接於該 加熱電路的-端，該加熱電路的另一端係透過該開關元件 而連接於口亥第一内口p端子，當該開關元件導通，則該蓄電 裝置之第一、第二内部端子間會透過該第一熔絲、加献電 路、開關元件而連接； ' 當電流通過該加熱電路而發熱，則該第一熔絲會因該 發熱而熔斷；其特徵在於， 車父该加熱電路的雷卩且彳* 4 +姑 J电丨且值和该第一熔絲的電阻值兩者合 計為高電阻值之旁路電阻系 ^ ^. 即/、田及弟一熔絲及加熱電路 所連接而成的電路並聯。 本發明之二次電池，係於該第一熔絲與第-輸ώ端子 之間插入第二炼絲，其係藉由該加熱電路的發熱來熔斷。 本發明之二次電池，贫# θ A + 八係具有用來檢測該蓄電裝 電壓之控制電路；电 电 # 晋 合 拉 ά # Between the output terminals of the ancient scholar, it will be worse if the DC voltage is connected to the first and the first-the current in the ^ round to charge, when the negative- Between the output terminals, the discharge 1233228 current of the power storage device will be supplied to the load; the part of the first wire-refining wire connected to the first output terminal is connected to the-end of the heating circuit, and the other end of the heating circuit is transmitted through The switching element is connected to the first inner port p terminal of the port. When the switching element is turned on, the first and second internal terminals of the power storage device are connected through the first fuse, a circuit, and a switching element. ; 'When the current is heated by the heating circuit, the first fuse will be blown due to the heating; it is characterized by the thunder of the heating circuit of the vehicle driver and 彳 * 4 + 电 J 电 丨 the value and the first The resistance value of a fuse is a bypass resistance system with a high resistance value ^ ^. That is, a circuit connected by a fuse and a heating circuit in parallel with Tian. The secondary battery of the present invention is inserted between the first fuse and the first terminal, and a second wire is inserted, which is blown by the heat of the heating circuit. In the secondary battery of the present invention, the lean # θ A + eight series has a control circuit for detecting the voltage of the power storage device;
該開關元件，将♦兮W A ，、田°亥控制電路檢測出該蓄電裝置的雷 壓為過電壓時導通。 电 本發明之二次電池之俘 您保4方法，该二次電池係具有可 充放電的蓄電裝置，者兮苦 田忒畜電裝置達既定電壓以上的情 ，使該蓄電裝置的兩端蕤电辨+哲卜△ ^ 路，並使該加熱電路發熱； 电峪而短 藉由該加熱電路的發 …、來熔斷忒第一熔絲，使該蓄電 衷置之至少一端獻兮-U ^ 於， /、W 一二人電池之輸出端子切斷；其特徵在 1233228 當藉由該第一熔絲與加熱電路來使該蓄電裝置的兩端 _路日守，5亥蓄電装置的兩端亦藉由旁路電阻而短路，在該 第一熔絲熔斷後，亦藉由通過該旁路電阻的電流來使該蓄 電裝置放電。 本發明之二次電池之保護方法，其係使該旁路電阻的 電阻值’較該第一熔絲的電阻值和該加熱電路的電阻值兩 者合計之值為H。 【實施方式】 第la圖的符號1係表示本發明之第一例的二次電池。 該二次電池1，係具有：蓄電裝置11、控制電路25、 第-:第二熔絲21、22、加熱電路23、開關電路26。 弟一、第二熔絲21、22係串聯。蓄電裝置11，係且 有高電壓側的内部端子、以及負電壓或接地電壓側的内部 端子’又，該二次電池丨之輸出端子亦具有高電壓側的輸 出端子、以及負電壓或接地電壓側的輸出端子。 蓄電裝置11之-内部端子與二次電池丨之—輸出端子 ’係f過第一、第二熔絲21、22的串聯電路而連接。 措由該串聯電路連接的内部端子與輸出端子係當 一内部端子a與第一給ψ*山工 m…^ 輸“子14’而另-内部端子與輸出 :子係“乍第二内部端子b與第-輸出端子15，第二内部 端子b與第一輸出端子1 5係串聯。 、加熱電路23的—端係連接於第—、第：熔絲Η、μ 的連接點C ’該加埶雷敗9 q | „ …電路23的另—端係透過開關元件26 而連接於第二輪出端子⑸及第二内部端子b)。 1233228 控制電路25係連接於開關元件26。開關元件26係能 取導通狀態與斷開狀態兩種類狀態的元件，並利用控制電 路25之輸出信號來作導通狀態與斷開狀態之切換。 蓄電裝置11係可進行重複充放電。 控制電路25，在通常狀態係將開關元件26置於斷開The switching element is turned on when the power storage device detects that the lightning voltage of the power storage device is an overvoltage. The method for protecting the secondary battery of the present invention includes a chargeable and dischargeable power storage device. When the battery power device reaches a predetermined voltage or more, the two ends of the power storage device are charged. Distinguish + Zhebu △ ^ circuit, and make the heating circuit heat; Electricity and short the fuse of the heating circuit to fuse the first fuse, so that at least one end of the storage battery is provided -U ^ Yu, /, W, the output terminals of the two-person battery are cut off; its characteristics are in 1233228 when the first fuse and the heating circuit are used to make both ends of the power storage device _ Lu Ri Shou, both ends of the 5 Hai power storage device It is also short-circuited by a bypass resistor. After the first fuse is blown, the power storage device is also discharged by a current passing through the bypass resistor. The method for protecting a secondary battery of the present invention is such that the resistance value of the bypass resistor is greater than the total value of the resistance value of the first fuse and the resistance value of the heating circuit by H. [Embodiment] Reference numeral 1 in Fig. 1 denotes a secondary battery according to a first example of the present invention. The secondary battery 1 includes a power storage device 11, a control circuit 25, first-to-second fuses 21 and 22, a heating circuit 23, and a switch circuit 26. The first and second fuses 21 and 22 are connected in series. The power storage device 11 has internal terminals on the high voltage side and internal terminals on the negative voltage or ground voltage side, and the output terminals of the secondary battery also have output terminals on the high voltage side, and negative voltage or ground voltage. Side output terminal. The internal terminal of the power storage device 11 and the output terminal of the secondary battery 丨 are connected through a series circuit of the first and second fuses 21 and 22. The internal terminals and output terminals connected by the series circuit are an internal terminal a and a first supply ψ * 山 工 m ... ^ "sub 14 'and another-internal terminal and output: sub system" second internal terminal b is connected in series with the first output terminal 15, and the second internal terminal b is connected with the first output terminal 15 in series. The-terminal of the heating circuit 23 is connected to the first and the first: the connection points C of the fuses Η and μ C 'The plus and minus 9 q |…… The other end of the circuit 23 is connected to the first through the switching element 26 The second round terminal ⑸ and the second internal terminal b). 1233228 The control circuit 25 is connected to the switching element 26. The switching element 26 is an element that can take two states of the on state and the off state, and uses the output signal of the control circuit 25 to Switch between on-state and off-state. The power storage device 11 can be repeatedly charged and discharged. The control circuit 25 turns the switching element 26 off in the normal state.
狀態，當在通常狀態下蓄電裝置n充電為一定電壓以I 的情形，第一輸出端子14與第二輸出端子15之間呈 定電壓。 1 士 田社乐 .不一蹰®踹于丨4、之間連接負栽 犄，對該負載施加該規定電壓，利用蓄電裝置 輸出電流。 木供應 田蓄電裝置11未充電或是放電後狀態之情形，必 代負載18,連接直流電壓源18來對蓄電裝置u充電 第直流Γ源18所輪出的充電電流(通常為定電：) 過第―、第二熔絲21、22,來對蓄電裝置u 因此’流出入於第-、第二輸出端子14、15的 通過第二熔絲21、22。 的電流會 在此情形，第一、第 輪出端子14、1 5之間短路、 直流電壓源供應過電流等产 間短路、 :，過電流通過的情形，藉由第_、第二 = 置11的第一内部端子3盥钕 畜電· l 、 與第-輸出端子14切斷，“ 電"H·的流入或流出停止。 使: 在過電流未通過的情形，亦有產生必須將蓄電裝置 1233228 與第一或第二於山 •j出知子1 4、1 5切斷的情形。 例如’在替七 畜電裝置11充電為規定電壓 電狀態的情形。 上而成為過充 該二次雷^ 池1的控制電路25，係用以g6 的充電電堡’當檢測出充電電屋上升為心畜電裳置η 過充電狀態，則使開關元件26導通。 值以上而成為 當在串聯的Μ ρ的第一、第二熔絲21、22 熔絲U的-端連接於蓄電裝置u的第=置成第- 二溶絲22的-端連接於第-輸出端子14, ^子3，第 元件26的導通，使蓄電裝置u的第 由於藉由開關 、6間藉由第一熔蜉 弟一内部端子a mi、加熱電路23 路，故藉由蓄電梦署ML 网闕兀件26而短 曰田I罨裒置1〗的放電，使 與加熱電路23。 通過第一熔絲21 又，藉由開關元件26的導通，第一 “、15間藉由第二熔絲 、第二輸出端子 短路。 23、開關元件26而 在直流電壓源18連接於第一、_ 的情形，㈣流電塵源18係第二炼絲：輸：：子14、15 開：Μ 26而短路，直流電壓源、18所輸出：電== 二熔絲22與加熱電路23。 冤a會通過 由於第一、第二熔絲21、2?弋4也 f ^或加熱電路23的電阻值 /、，開關兀件26的導通電阻亦小，者 十a 田開關元件26導通時 ，來自蓄電裝置11或直流電壓源 t φ ^ 、 愿18而供應至加熱電路23 勺電>”L係較大電流，加熱電路2 3 私吩係精由該大電流而發熱 12 1233228 第一、第二溶絲21、2 2兩者皆受到加熱電路2 3發熱 的影響，藉由開關元件26的導通而通過的電流，即使並 非係第一、第二熔絲21、22自己發熱而熔斷程度的大電流 ，第一、第二熔絲21、22亦會藉由加熱電路23的發熱而 熔斷。 但，由於蒭一、第二熔絲21、22係均等受到加熱電路 23發熱的影響，故會有第一熔絲21較第二熔絲22先熔斷 的情形，相反地，亦會有第二熔絲22較第一熔絲21先熔 斷的情形。 首先，說明當第二熔絲22較第一熔絲21先熔斷的情 形，在該情形，雖藉由第二熔絲22的熔斷而使來自直流 電壓源18的電流流入停止，惟，第一熔絲21與加熱電： 23係維持串聯狀態，故蓄電裝置11的放電電流會通過該 電路而持續流通。 在本發明之二次電池丨，旁路電阻24係和第一In the state, when the power storage device n is charged to a certain voltage to I in a normal state, a voltage is set between the first output terminal 14 and the second output terminal 15. 1 Shi Tian Shele. Connect a load to the load cell 4 and apply the specified voltage to the load, and use the power storage device to output current. If the power supply device 11 in the wood supply field is not charged or discharged, the load 18 must be replaced, and a DC voltage source 18 is connected to charge the power storage device u to charge the charging current of the first DC Γ source 18 (usually fixed power :) The first and second fuses 21 and 22 pass through the second fuses 21 and 22 to the power storage device u and therefore flow out into the first and second output terminals 14 and 15. The current will be in this situation, the short circuit between the first and second round output terminals 14, 15 and the inter-productive short circuit such as the DC voltage source overcurrent supply,: In the case of overcurrent, the first and second = set The first internal terminal 3 of the eleventh neodymium electric power · l is cut off from the first output terminal 14, and the inflow or outflow of the electric power "H · stops. Therefore: In the case where the overcurrent does not pass, there is a case where it must be turned off. A case where the power storage device 1233228 is cut off from the first or second Yushan • Jachiko 1 4 and 15. For example, 'the case where the seven animal power device 11 is charged to a predetermined voltage electric state. The above becomes overcharge. The control circuit 25 of the sub-thunder ^ pool 1 is used for the charging electric castle of g6 '. When it is detected that the charging house rises to the overcharged state of the electric house, the switching element 26 is turned on. The first and second fuses 21 and 22 of the series M ρ are connected to the-terminal of the power storage device u and the-terminal of the fuse U is connected to the-terminal of the second fuse 22 and connected to the-output terminal 14. 3, the conduction of the second element 26 makes the first end of the power storage device u a mi, heating circuit 23, so by the electric storage dream ML network unit 26 and short I field I set 1〗 discharge, and the heating circuit 23. Through the first fuse 21, and by the switch When the element 26 is turned on, the first and 15 terminals are short-circuited by the second fuse and the second output terminal. 23. When the switching element 26 is connected to the first and _ DC voltage source 18, the current source 18 is the second wire-smelting wire: Loss :: Sub 14, 15 Open: M 26 and short circuit, the DC voltage source, Output of 18: electricity == two fuses 22 and heating circuit 23. It will pass because the first and second fuses 21, 2 and 4 are also f ^ or the resistance value of the heating circuit 23, and the on-resistance of the switching element 26 is also small. When the switching element 26 is turned on, , From the electric storage device 11 or the DC voltage source t φ ^, may be 18 and supplied to the heating circuit 23 scoop > "L is a large current, the heating circuit 2 3 is heated by this large current 12 1233228 first Both the second fuses 21 and 22 are affected by the heat generated by the heating circuit 23, and the current passed through the conduction of the switching element 26, even if the first and second fuses 21 and 22 are not heated by themselves and blown To a large degree of current, the first and second fuses 21 and 22 are also blown by the heat of the heating circuit 23. However, since the first and second fuses 21 and 22 are equally affected by the heat of the heating circuit 23, Therefore, the first fuse 21 may be blown before the second fuse 22, and conversely, the second fuse 22 may be blown before the first fuse 21. First, when the second fuse 22 is blown, The case where the first fuse 21 is blown before, but in this case, the The current flowing into the voltage source 18 is stopped, but the first fuse 21 and the heating unit 23 are maintained in series, so the discharge current of the power storage device 11 will continue to flow through the circuit. In the secondary battery of the present invention, Bypass resistor 24 series and first
與加熱電路23的串聯電路並聯 即，5亥旁路電阻24的一端係連接於蓄電裝置11的 I5為子a，另一端係連接於加熱電路23與開關元件 ::接的部分’因此’施加於第一熔絲21與加熱電路 的串聯電路之電壓，亦會施加於旁路電阻24的兩端。 旁路電阻24的電阻值，係設成較第一熔絲21與加 一々23的電阻值合計之值為大（例如1〇倍以上），故當 、々糸22 ‘斷’電流通過第_熔絲2ι與加熱電路㈡的 13 1233228 聯電路時，電流幾乎不會通過旁路電阻24。 因此’蓄電裝置11的放電電流大部分係通過加熱電路 23 ’故藉由加熱電路23的發熱來使第—熔絲21溶斷。 在此狀態下，蓄電裝置11的第-、第二内部端子a、 b之間’由於係透過㈣電阻24與開關元件⑼而呈短路 狀態，故蓄電裝置11持續放電，而使蓄電裝置"的電壓 逐漸降低。放電電流係取決於蓄電裳i i 電阻24的電阻值之大小β '、 /由於旁路電阻24的電阻值較大，故即使蓄電裝置^ 係呈過電壓狀態，通過旁路電阻24 @電流小，故旁路電 阻24僅稍微發熱。 々又，由於旁路電阻24係將加熱電路23旁路，在第一 々熔、糸21 22熔斷的狀態下電流並未通過加熱電路 23 ’故在第一熔絲21溶斷後，加熱電路23並不發熱。 ，★其次’說明第-熔絲21較第二熔絲22先熔斷的情形 第一熔絲22維持導通，在第一熔絲21熔斷的狀態下， &於蓄電裝詈11沾赞 _ 、弟一内部端子a係透過旁路電阻24與 :關兀:牛26而連接於第二内部端子b，因此，過充電狀態 另—電凌置11的放電電流會通過旁路電阻24，而使蓄電 裝置11的電壓逐漸降低。 在將直流電壓源18連接於第一、第二輸出端子14、 5的情形，與蓄雷姑 ®电展置11的放電無關，藉由直流電壓源 8所供應電流來使加熱電路23發熱，而使第二溶絲22炼 1233228 結果，在第 第 烙絲2卜22兩者皆熔斷的狀態下 ，-次電池1的内部僅係通過旁路電阻24的電流在流通。 即使在第-、第二炫絲2卜22兩者任一先炫斷的情形 ，則藉由使蓄電裝置U的放電結束、或使開關元件26呈 斷開狀態，亦可使通過旁路電阻24的電流停止。 。雖因蓄電裝置11的電壓降低亦會使控制電路25的動 作停止，惟，若使用在控制電路25的動作停止狀態下呈 導通狀態的開關元件26，則可使蓄電裝置丨丨放電至低電 壓為止。 _ 開關元件26,即使在控制電路25動作停止而呈斷開 狀態，由於殘留於蓄電裝置n的電壓低，故不會有問題 又，上述開關元件26雖係藉由外部信號來進行導通狀 態與斷開狀態切換的元件，惟亦可使用M〇s電晶體或雙載 子電晶體等。原理上，亦可使用繼電器元件。 又，上述加熱電路23，亦能以一或二個以上的加熱元 件來構成，例如，如第lb圖所示般，將二個加熱元件23a 、23b並聯，將一方的加熱元件23a配置於第一熔絲21附 近，將另一加熱元件23b配置於第二熔絲22附近，藉由位 於附近的加熱元件23a、23b發熱來熔斷第一、第二熔絲 21、2 2亦可。 依本發明，不僅可使蓄電裝置與輸出端子切斷，並可 解除蓄電裝置之過充電狀態，故安全性極高。 【圖式簡單說明】 15 1233228 (一） 圖式部分 第1 a圖係用以說明本發明之二次電池的一例之圖；第 1 b圖係用以說明其加熱電路圖。 第2圖係用以說明相關技術之二次電池的一例之圖。 第3圖係用以說明相關技術之二次電池的另一例之圖 〇 (二） 元件代表符號 1 二 次 電 池 11 蓄 電 裝 置 14 第 一 出端 子 15 第 二 Wm 出端 子 18 直 流 電 壓源 21 第 一 熔 絲 22 第 二 熔 絲 23 加 熱 電 路 25 控 制 電 路 26 開 關 元件 a 第 一 内 部端 子 b 第 二 内 部端 子 c 連接點 16In parallel with the series circuit of the heating circuit 23, that is, one end of the 5H bypass resistor 24 is connected to I5 of the power storage device 11 as the sub-a, and the other end is connected to the heating circuit 23 and the switching element :: the connection portion 'so' is applied The voltage of the series circuit between the first fuse 21 and the heating circuit is also applied to both ends of the bypass resistor 24. The resistance value of the bypass resistor 24 is set to be larger (for example, 10 times or more) than the total value of the resistance values of the first fuse 21 and plus one 々23, so when the 断 22 'off' current passes through the _ When the fuse 2m is connected to 13 1233228 of the heating circuit, the current hardly passes through the bypass resistor 24. Therefore, most of the discharge current of the power storage device 11 passes through the heating circuit 23, so that the first fuse 21 is melted by the heat generated by the heating circuit 23. In this state, since the first and second internal terminals a and b of the power storage device 11 are in a short-circuited state through the ㈣ resistor 24 and the switching element ，, the power storage device 11 continues to discharge, so that the power storage device " The voltage gradually decreases. The discharge current depends on the value of the resistance value β ′ of the storage capacitor ii resistor 24. / Because the resistance value of the bypass resistor 24 is large, even if the storage device ^ is in an overvoltage state, the bypass resistor 24 @current is small, Therefore, the bypass resistor 24 generates heat only slightly. In addition, because the bypass resistor 24 bypasses the heating circuit 23, the current does not pass through the heating circuit 23 in a state where the first coil 21 and the fuse 21 22 are blown, so after the first fuse 21 is melted, the heating circuit 23 Does not heat. ★ Secondly, "the first fuse 22 is blown before the second fuse 22, and the first fuse 22 is kept conducting. In the state where the first fuse 21 is blown, & the power storage device 11 is __, The first internal terminal a is connected to the second internal terminal b through the bypass resistor 24 and: OFF: cattle 26. Therefore, the over-charge state—the discharge current of the electric set 11 will pass through the bypass resistor 24, so that The voltage of the power storage device 11 gradually decreases. In the case where the DC voltage source 18 is connected to the first and second output terminals 14 and 5, the heating circuit 23 is heated by the current supplied by the DC voltage source 8 regardless of the discharge of the Leigu® electric booth 11. As a result, the second dissolving wire 22 is made 1233228. As a result, in the state where both the first soldering wire 22 and 22 are blown, only the current passing through the bypass resistor 24 flows through the inside of the secondary battery 1. Even in the case where either of the second and second wires 22 and 22 is turned off first, by passing the discharge of the power storage device U or by turning off the switching element 26, the bypass resistor can be passed. 24 current stops. . Although the operation of the control circuit 25 is also stopped due to a decrease in the voltage of the power storage device 11, if the switching element 26 that is turned on when the operation of the control circuit 25 is stopped, the power storage device can be discharged to a low voltage. until. _ The switching element 26 is in an off state even when the control circuit 25 is stopped. Since the voltage remaining in the power storage device n is low, there is no problem. Although the switching element 26 is turned on by an external signal, For the off-state switching element, a Mos transistor or a bipolar transistor can also be used. In principle, relay elements can also be used. The heating circuit 23 may be configured by one or two heating elements. For example, as shown in FIG. 1b, two heating elements 23a and 23b are connected in parallel, and one heating element 23a is disposed at the first heating element 23a. In the vicinity of one fuse 21, another heating element 23b is arranged near the second fuse 22, and the first and second fuses 21 and 22 may be blown by the heating elements 23a and 23b located in the vicinity. According to the present invention, not only the power storage device can be cut off from the output terminal, but also the overcharge state of the power storage device can be released, so the safety is extremely high. [Schematic description] 15 1233228 (1) Schematic part Figure 1a is a diagram illustrating an example of the secondary battery of the present invention; Figure 1b is a diagram illustrating a heating circuit thereof. FIG. 2 is a diagram for explaining an example of a secondary battery in the related art. FIG. 3 is a diagram for explaining another example of the secondary battery of the related technology. (2) Symbols of component symbols 1 Secondary battery 11 Power storage device 14 First output terminal 15 Second Wm output terminal 18 DC voltage source 21 First Fuse 22 Second fuse 23 Heating circuit 25 Control circuit 26 Switching element a First internal terminal b Second internal terminal c Connection point 16