JP2013239279A - Battery power supply system - Google Patents
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- JP2013239279A JP2013239279A JP2012110223A JP2012110223A JP2013239279A JP 2013239279 A JP2013239279 A JP 2013239279A JP 2012110223 A JP2012110223 A JP 2012110223A JP 2012110223 A JP2012110223 A JP 2012110223A JP 2013239279 A JP2013239279 A JP 2013239279A
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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
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- 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
Description
本発明は、機器本体と、二次電池とを具備した電池電源システムに関し、特にシステムの長期停止前の充放電制御に関する。 The present invention relates to a battery power supply system including a device main body and a secondary battery, and more particularly to charge / discharge control before a long-term stop of the system.
近年、二次電池は小型携帯機器用電源をはじめ、自動車の始動用や駆動用、通信用の予備電源、家庭用蓄電、業務用蓄電など様々な機器の駆動に利用されている。 2. Description of the Related Art In recent years, secondary batteries have been used for driving various devices such as power sources for small portable devices, starting and driving automobiles, standby power sources for communications, household power storage, and business power storage.
二次電池は、使用を続けていくと劣化したり、故障したりするため、交換することになる。また、大型機器本体を移動もしくは撤去する場合など、電池電源装置を長期間使用しないことになる。 The secondary battery deteriorates or breaks down as it continues to be used, so it must be replaced. In addition, when the large equipment body is moved or removed, the battery power supply device is not used for a long time.
このような二次電池の交換時には、単に電池の交換をするだけでなく、様々な充放電制御が行われていた。 At the time of replacement of such a secondary battery, not only battery replacement but also various charging / discharging controls have been performed.
例えば、ハイブリッド車両用電池の劣化状態が交換を要するレベルに達してもある程度の距離を走行することができるよう、二次電池の劣化状態を検出して、二次電池の満充電容量に対する充電量の比率（ＳＯＣ）の目標値を設定し、ＳＯＣ目標値になるように電池の充放電を制御することが提案されている（特許文献１、参照）。 For example, the amount of charge with respect to the full charge capacity of the secondary battery is detected by detecting the deterioration state of the secondary battery so that the vehicle can travel a certain distance even if the battery state of the hybrid vehicle reaches a level that requires replacement. It has been proposed to set a target value of the ratio (SOC) of the battery and to control charging / discharging of the battery so as to be the SOC target value (see Patent Document 1).
また、残存量が少なくなった交換時に、積極的にエネルギーを消費させることも提案されている（特許文献２参照）。 In addition, it has been proposed to actively consume energy at the time of replacement when the remaining amount is reduced (see Patent Document 2).
これらの二次電池で駆動される機器において、メンテナンスや電池交換を行う場合、あるいは大型機器本体を移動もしくは撤去する場合など、電池電源装置を長期間使用しないことになるが、二次電池はＳＯＣが高い状態で長期間保存すると劣化が促進される課題があった。 In equipment driven by these secondary batteries, the battery power supply device will not be used for a long period of time, such as when performing maintenance or battery replacement, or when moving or removing the main body of the large equipment. There is a problem that deterioration is promoted when stored for a long time in a high state.
また、電池内蔵機器の高性能化や大型化に伴い、電池電源装置の蓄えるエネルギー量が大きくなっており、メンテナンスや電池交換などで電源装置を分解する作業時、二次電池のＳＯＣが高い状態のままであると、万一、作業者が誤った操作をした場合、感電する、あるいは短絡による発熱で火傷を負う、などの危険性があった。 In addition, as the battery built-in equipment increases in performance and size, the amount of energy stored in the battery power supply has increased, and the SOC of the secondary battery is high when disassembling the power supply for maintenance or battery replacement. If this is the case, there is a risk that if an operator performs an incorrect operation, an electric shock may be caused or a burn may occur due to heat generated by a short circuit.
これに対し、特許文献１のように二次電池の劣化状態に合わせて充電を制御する技術では、電池が劣化していない場合は、充電を制御することがなく、特許文献２のように電池の残存量が少ない場合、すなわちＳＯＣが０に近い状態で、更に電池を消費するよう制御する技術では、ＳＯＣが高い状態では電池の消費を行わない。 On the other hand, in the technique of controlling charging according to the deterioration state of the secondary battery as in Patent Document 1, if the battery is not deteriorated, the charging is not controlled, and the battery as in Patent Document 2 is not performed. When the remaining amount of the battery is small, that is, in the state where the SOC is close to 0 and the control is performed so that the battery is further consumed, the battery is not consumed when the SOC is high.
つまり、二次電池の劣化状態や残存量に関係なく、二次電池が長期間停止する場合に電池の安全性や信頼性を確保する為の充放電制御を行う技術はなかった。 That is, there is no technique for performing charge / discharge control for ensuring the safety and reliability of the battery when the secondary battery is stopped for a long period of time, regardless of the deterioration state or remaining amount of the secondary battery.
本発明の目的は、電池電源装置の電池交換やメンテナンス、あるいは大型機器本体の移動や撤去作業時などの場合、作業者の安全を確保し、かつ、機器停止時の電池劣化を促進しない保存状態を確保できる電池電源システムを提供することである。 The object of the present invention is to ensure the safety of the worker in the case of battery replacement and maintenance of the battery power supply device or the movement or removal work of the main body of the large equipment, and a storage state that does not promote battery deterioration when the equipment is stopped. It is providing the battery power supply system which can ensure.
上記目的を達成する為に、本発明の電池電源システムは、充電部と、二次電池と、前記二次電池で駆動できる負荷回路とを具備した電池電源システムにおいて、前記二次電池の満充電容量に対する充電量の比率（ＳＯＣ）を検出する検出手段と、前記充電部から前記二次電池への充電を制御する制御手段と、前記二次電池から前記負荷回路への放電を制御する制御手段とを備えた充放電制御回路をさらに有し、前記充放電制御回路は、長期間停止を意味する停止信号を受信した場合、前記充電部からの充電を停止し、かつ、前記検出手段により検出されたＳＯＣが所定のＳＯＣ目標値以下になるまで放電を行い、前記ＳＯＣ目標値以下になった時、放電を停止することを特徴とする。 In order to achieve the above object, a battery power system of the present invention is a battery power system including a charging unit, a secondary battery, and a load circuit that can be driven by the secondary battery. Detection means for detecting a ratio of charged amount to capacity (SOC), control means for controlling charging from the charging unit to the secondary battery, and control means for controlling discharge from the secondary battery to the load circuit The charge / discharge control circuit further comprises a charge / discharge control circuit, and the charge / discharge control circuit stops charging from the charging unit and detects the detection by the detection means when receiving a stop signal indicating a long-term stop. Discharging is performed until the applied SOC becomes a predetermined SOC target value or less, and when the SOC becomes the SOC target value or less, the discharge is stopped.
ここで、二次電池で駆動できる負荷回路は、少なくとも二次電池で駆動できるモードがあれば良く、例えば商用電源により駆動するモードがあってもかまわない。そして二次電池は、電池パックのように制御部と一体になっていても良く、機器本体に内蔵されていても外付けの外部電源に内蔵されていてもかまわない。また、制御部に備えられた、それぞれの制御手段は、共通の素子又は回路を使用していても良く、例えば充電を制御する手段と放電を制御する手段が、充放電を制御する手段となっていてもかまわない。 Here, the load circuit that can be driven by the secondary battery only needs to have a mode that can be driven by at least the secondary battery. For example, there may be a mode that is driven by a commercial power source. The secondary battery may be integrated with the control unit like a battery pack, and may be built in the apparatus main body or built in an external power source. Each control means provided in the control unit may use a common element or circuit. For example, the means for controlling charging and the means for controlling discharge become means for controlling charging and discharging. It does not matter.
このことにより、電池電源装置の電池交換やメンテナンス、あるいは大型機器本体の移動や撤去作業時など場合、作業者の安全を確保でき、かつ、機器停止時の電池劣化を促進しない保存状態を確保できる。 This makes it possible to ensure the safety of the operator when replacing or maintaining the battery of the battery power supply device, or when moving or removing the main body of the large device, and to ensure a storage state that does not promote battery deterioration when the device is stopped. .
また本発明の電池電源システムは、二次電池が複数の素電池の組合せであることが好ましい。 In the battery power supply system of the present invention, the secondary battery is preferably a combination of a plurality of unit cells.
本発明の電池電源システムは、外部電源もしくは内蔵の二次電池で駆動される機器からの長期間停止を意味する信号が、意図的に一定期間以上使用しないものであることが好ましい。 In the battery power supply system of the present invention, it is preferable that a signal indicating a long-term stop from a device driven by an external power supply or a built-in secondary battery is intentionally not used for a certain period or more.
本発明の電池電源システムは、ＳＯＣ目標値が５５％以下であることが好ましい。 In the battery power supply system of the present invention, the SOC target value is preferably 55% or less.
本発明によれば、電池電源装置の電池交換やメンテナンス、あるいは大型機器本体の移動や撤去作業時などの場合、作業者の安全を確保し、かつ、機器停止時に電池劣化を促進しない保存状態を確保できる電池電源システムを提供することができる。 According to the present invention, in the case of battery replacement or maintenance of a battery power supply device, or when moving or removing a large-sized device main body, a storage state that ensures the safety of the worker and does not promote battery deterioration when the device is stopped. A battery power supply system that can be secured can be provided.
以下、本発明の実施の形態について図面を参照しながら詳細に説明する。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
図１は、本発明の一実施形態を示す二次電池４の充放電制御回路５を備えた、電池パック２及び電池電源システム１の構成の一例を示すブロック図である。図１に示す電池電源
システム１は、電池パック２と、機器本体３とが組み合わされて構成されている。
FIG. 1 is a block diagram illustrating an example of a configuration of a battery pack 2 and a battery power supply system 1 including a charge / discharge control circuit 5 for a secondary battery 4 according to an embodiment of the present invention. A battery power supply system 1 shown in FIG. 1 is configured by combining a battery pack 2 and a device main body 3.
電池電源システム１は、例えば、携帯型パーソナルコンピュータやデジタルカメラ、携帯電話機等の電子機器、電気自動車やハイブリッドカー等の車両、等の電気機器として構成された、二次電池を電源として用いるシステムである。そして、機器本体３は、例えばこれら電気機器の本体部分であり、負荷回路３４は、これら電気機器において、電池パック２からの電力供給により動作する負荷回路である。 The battery power system 1 is a system that uses a secondary battery as a power source, which is configured as an electric device such as an electronic device such as a portable personal computer, a digital camera, or a mobile phone, or a vehicle such as an electric vehicle or a hybrid car. is there. And the apparatus main body 3 is a main-body part of these electric devices, for example, and the load circuit 34 is a load circuit which operate | moves by the electric power supply from the battery pack 2 in these electric devices.
電池パック２は、二次電池４、充放電制御回路５、電流検出抵抗６、スイッチング素子Ｑ１，Ｑ２、及び接続端子１１，１２，１３を備えている。また、充放電制御回路５は、制御部５０、電圧検出部５１、電流検出部５２、及び通信部５４を備えている。 The battery pack 2 includes a secondary battery 4, a charge / discharge control circuit 5, a current detection resistor 6, switching elements Q 1 and Q 2, and connection terminals 11, 12, and 13. The charge / discharge control circuit 5 includes a control unit 50, a voltage detection unit 51, a current detection unit 52, and a communication unit 54.
なお、電池電源システム１は、必ずしも電池パック２と機器本体３とに分離可能に構成されるものに限られず、電池電源システム１全体で一つの充放電制御回路５が構成されていてもよい。また、充放電制御回路５を、電池パック２と機器本体３とで分担して備えるようにしてもよい。また、二次電池４は、電池パックにされている必要はなく、例えば充放電制御回路５が、車載用のＥＣＵ（Ｅｌｅｃｔｒｉｃ Ｃｏｎｔｒｏｌ Ｕｎｉｔ）として構成されていてもよい。 Note that the battery power supply system 1 is not necessarily limited to the battery pack 2 and the device main body 3 configured to be separable, and the entire battery power supply system 1 may include one charge / discharge control circuit 5. Further, the charge / discharge control circuit 5 may be shared by the battery pack 2 and the device main body 3. Moreover, the secondary battery 4 does not need to be a battery pack. For example, the charge / discharge control circuit 5 may be configured as an on-vehicle ECU (Electric Control Unit).
機器本体３は、接続端子３１，３２，３３、負荷回路３４、充電部３５、通信部３６、制御部３７、及び表示部３８を備えている。充電部３５は、給電用の接続端子３１，３２に接続され、通信部３６は、接続端子３３に接続されている。 The device body 3 includes connection terminals 31, 32, 33, a load circuit 34, a charging unit 35, a communication unit 36, a control unit 37, and a display unit 38. The charging unit 35 is connected to power supply connection terminals 31 and 32, and the communication unit 36 is connected to the connection terminal 33.
また、電池パック２が、機器本体３に取り付けられると、電池パック２の接続端子１１，１２，１３と、機器本体３の接続端子３１，３２，３３とが、それぞれ接続されるようになっている。通信部５４，３６は、接続端子１３，３３を介して互いにデータ送受信可能に構成された通信インターフェイス回路である。 When the battery pack 2 is attached to the device main body 3, the connection terminals 11, 12, 13 of the battery pack 2 and the connection terminals 31, 32, 33 of the device main body 3 are connected to each other. Yes. The communication units 54 and 36 are communication interface circuits configured to be able to transmit / receive data to / from each other via the connection terminals 13 and 33.
充電部３５は、制御部３７からの制御信号に応じた電流、電圧を、接続端子３１，３２を介して電池パック２へ供給する電源回路である。充電部３５は、例えば商用電源電圧から電池パック２の充電電流を生成する電源回路であってもよく、例えば太陽光、風力、あるいは水力といった自然エネルギーに基づき発電する発電装置や、内燃機関等の動力によって発電する発電装置等であってもよい。 The charging unit 35 is a power supply circuit that supplies current and voltage according to a control signal from the control unit 37 to the battery pack 2 via the connection terminals 31 and 32. The charging unit 35 may be, for example, a power supply circuit that generates a charging current for the battery pack 2 from a commercial power supply voltage. For example, a power generation device that generates power based on natural energy such as sunlight, wind power, or hydropower, an internal combustion engine, or the like A power generation device that generates power by motive power may be used.
表示部３８は、例えば液晶表示器やＬＥＤ（Ｌｉｇｈｔ Ｅｍｉｔｔｉｎｇ Ｄｉｏｄｅ）が用いられる。なお、例えば機器本体３が、携帯型パーソナルコンピュータやデジタルカメラ等の電子機器である場合、当該電子機器が備える液晶表示器等の表示装置を表示部３８として用いてもよい。 As the display unit 38, for example, a liquid crystal display or an LED (Light Emitting Diode) is used. For example, when the device body 3 is an electronic device such as a portable personal computer or a digital camera, a display device such as a liquid crystal display provided in the electronic device may be used as the display unit 38.
制御部３７は、例えばマイクロコンピュータを用いて構成された制御回路である。そして、制御部３７は、例えば電池パック２における制御部５０から通信部５４によって送信された要求指示が、通信部３６によって受信されると、制御部３７は、通信部３６によって受信された要求指示に応じて充電部３５を制御することにより、電池パック２から送信された要求指示に応じた電流や電圧を、充電部３５から接続端子１１，１２へ出力させて、二次電池４を充電させる。 The control unit 37 is a control circuit configured using, for example, a microcomputer. For example, when the request instruction transmitted from the control unit 50 in the battery pack 2 by the communication unit 54 is received by the communication unit 36, the control unit 37 receives the request instruction received by the communication unit 36. By controlling the charging unit 35 according to the above, the secondary battery 4 is charged by causing the charging unit 35 to output current and voltage corresponding to the request instruction transmitted from the battery pack 2 to the connection terminals 11 and 12. .
また、制御部３７は、制御部５０から、二次電池４で生じた異常内容を示す情報を、通信部３６を介して受信すると、表示部３８によって、当該異常内容を表示させる。 In addition, when the control unit 37 receives information indicating an abnormality content generated in the secondary battery 4 from the control unit 50 via the communication unit 36, the control unit 37 causes the display unit 38 to display the abnormality content.
電池パック２では、接続端子１１は、スイッチング素子Ｑ２とスイッチング素子Ｑ１と
を介して二次電池４の正極に接続されている。スイッチング素子Ｑ１，Ｑ２としては、例えばｐチャネルのＦＥＴ（Ｆｉｅｌｄ Ｅｆｆｅｃｔ Ｔｒａｎｓｉｓｔｏｒ）が用いられる。
In the battery pack 2, the connection terminal 11 is connected to the positive electrode of the secondary battery 4 via the switching element Q2 and the switching element Q1. As the switching elements Q1, Q2, for example, a p-channel FET (Field Effect Transistor) is used.
また、接続端子１２は、電流検出抵抗６を介して二次電池４の負極に接続されており、接続端子１１からスイッチング素子Ｑ２、スイッチング素子Ｑ１、二次電池４、及び電流検出抵抗６を介して接続端子１２に至る電流経路が構成されている。 The connection terminal 12 is connected to the negative electrode of the secondary battery 4 through the current detection resistor 6, and the connection terminal 11 passes through the switching element Q 2, the switching element Q 1, the secondary battery 4, and the current detection resistor 6. Thus, a current path to the connection terminal 12 is configured.
なお、接続端子１１，１２，１３，３１，３２，３３は、電池パック２と機器本体３とを電気的に接続するものであればよく、例えば電極やコネクタ、端子台等であってもよく、ランドやパッド等の配線パターンであってもよい。 The connection terminals 11, 12, 13, 31, 32, and 33 may be any terminals that electrically connect the battery pack 2 and the device body 3, and may be electrodes, connectors, terminal blocks, and the like. Alternatively, a wiring pattern such as a land or a pad may be used.
電流検出抵抗６は、電流検出用の、いわゆるシャント抵抗であり、二次電池４の充電電流および放電電流を電圧値に変換する。なお、電流検出抵抗６の代わりに、例えば電流変成器やホール素子等の電流検出素子を用いてもよい。 The current detection resistor 6 is a so-called shunt resistor for current detection, and converts the charging current and discharging current of the secondary battery 4 into voltage values. Instead of the current detection resistor 6, for example, a current detection element such as a current transformer or a Hall element may be used.
ＳＯＣ算出部５０１は、ルックアップテーブルを用い、例えば、電圧検出部５１で検出した電池の開回路電圧、もしくは電圧検出部５１で検出した電池の閉回路電圧と電流検出部５２で検出した電流を元に算出した抵抗値ＤＣＩＲを元に算出する。 The SOC calculation unit 501 uses a lookup table, for example, the battery open circuit voltage detected by the voltage detection unit 51 or the battery closed circuit voltage detected by the voltage detection unit 51 and the current detected by the current detection unit 52. Calculation is based on the resistance value DCIR calculated based on the original.
長期停止スイッチ５０２が押されると、長期停止信号が制御部３７に入力され、通信部３６を通じて、充放電制御回路５の通信部５４に入力される。 When the long-term stop switch 502 is pressed, a long-term stop signal is input to the control unit 37 and input to the communication unit 54 of the charge / discharge control circuit 5 through the communication unit 36.
図２は本発明の電池電源システムの充放電制御回路５の動作を示すフローチャートである。ステップＳ１で、充放電制御回路５が、長期間停止を意味する信号を受信すると、ステップＳ２で充電部３５からの充電を禁止する。ステップＳ３ではステップＳ４の判定で用いる二次電池４のＳＯＣを検出する。ステップＳ４ではステップＳ３で検出されたＳＯＣの値が所定のｘ以下であることを判定する。 FIG. 2 is a flowchart showing the operation of the charge / discharge control circuit 5 of the battery power supply system of the present invention. In step S1, when the charge / discharge control circuit 5 receives a signal indicating a long-term stop, charging from the charging unit 35 is prohibited in step S2. In step S3, the SOC of the secondary battery 4 used in the determination in step S4 is detected. In step S4, it is determined that the SOC value detected in step S3 is equal to or less than a predetermined x.
図３はＳＯＣと、電池をある一定期間保存した後の電池容量を保存する前の電池容量の比で表した容量回復率との関係を示す図である。曲線ａ、曲線ｂ、は各々異なる温度で電池を保存した場合である。 FIG. 3 is a diagram showing the relationship between the SOC and the capacity recovery rate represented by the ratio of the battery capacity before storing the battery capacity after storing the battery for a certain period. Curves a and b are when the batteries are stored at different temperatures.
例えば、リチウムイオン電池を常温（２５℃）で１ヶ月以上保存すると、曲線ａのようにＳＯＣの値がｘ以上で、容量回復率が低下する傾向がある。また、真夏の屋外放置や赤道付近を海上輸送する場合など、想定される最大の温度である４５℃で１ヶ月以上保存すると曲線ｂのように特定のＳＯＣの値がｘ以上で容量回復率が常温時よりも小さくなる傾向がある。 For example, when a lithium ion battery is stored at room temperature (25 ° C.) for one month or longer, the SOC recovery rate tends to decrease when the SOC value is x or higher as shown by curve a. Also, when left outdoors in midsummer or transported by sea near the equator, if stored for more than one month at 45 ° C, the maximum temperature expected, the capacity recovery rate will be higher when the specific SOC value is x or more as shown by curve b. There is a tendency to be smaller than at normal temperature.
１ヶ月間放置しても保存される温度によって容量回復率が変化しないのはＳＯＣが５５％以下であることから、ＳＯＣの値がｘは５５％以下であることが望ましい。 It is desirable that the SOC value x is 55% or less because the capacity recovery rate does not change depending on the storage temperature even if it is left for one month because the SOC is 55% or less.
更に、電池電源の電池容量が大きく、短絡した場合に大きな電流が流れる可能性がある場合、もしくは電源停止後に長距離の輸送を行う場合、作業者の安全を考慮しＳＯＣの値がｘは５０％以下であることが望ましい。 Furthermore, when the battery capacity of the battery power source is large and there is a possibility that a large current flows in the case of a short circuit, or when transporting a long distance after the power supply is stopped, the SOC value x is 50 in consideration of the safety of the operator. % Or less is desirable.
図２のステップＳ４でＳＯＣの値がｘが所定の目標値以下ではないと判定すると、ステップＳ７で負荷回路３４により放電を行い、その後、ステップＳ３に戻る。 If it is determined in step S4 of FIG. 2 that the SOC value is not less than the predetermined target value, the load circuit 34 discharges in step S7, and then the process returns to step S3.
ステップＳ７で示す負荷回路３４は、機器が内蔵する負荷や電池電源が内蔵する負荷、
あるいは機器や電池電源に外部接続した負荷のいずれか１つ、もしくは複数の組み合わせでも良い。
The load circuit 34 shown in step S7 includes a load built in the device and a load built in the battery power source,
Alternatively, any one or a combination of loads externally connected to a device or a battery power source may be used.
ステップＳ４でＳＯＣの値ｘが所定の値以下であると判定すると負荷による出力を禁止し、充放電制御回路５から機器本体３の制御部３７へ入出力停止完了を意味する信号を発信する。
尚、ステップＳ６は省いてもよい。
If it is determined in step S4 that the SOC value x is equal to or less than the predetermined value, output by the load is prohibited, and a signal indicating completion of input / output stop is transmitted from the charge / discharge control circuit 5 to the control unit 37 of the device body 3.
Note that step S6 may be omitted.
本発明の長期間停止を意味する信号は、意図的に一定期間以上使用しないものであるが、この一定期間とは、電池パックの電池交換やメンテナンス、あるいは大型機器本体の移動や撤去作業などの用途に合わせて機器製造者もしくは使用者が任意に設定する期間を意味する。 The signal meaning the long-term stop of the present invention is intentionally not used for a certain period of time, but this certain period means battery replacement or maintenance of the battery pack or movement or removal work of the large equipment body. It means a period that is arbitrarily set by the device manufacturer or user according to the application.
本発明は、リチウムイオン電池や鉛蓄電池、ニッケル水素電池、ニカド電池など、いずれか１種類以上の二次電池を用いた電池電源装置でも同様の効果が得られる。ただし、鉛蓄電池の場合、サルフェーションによる劣化を考慮し、ＳＯＣの値は３０％以上が望ましい。また、ニッケル水素や二カド電池は、自己放電による劣化を考慮し、ＳＯＣの値は２０％以上が望ましい。 The present invention can achieve the same effect even in a battery power supply device using any one or more types of secondary batteries such as a lithium ion battery, a lead storage battery, a nickel metal hydride battery, and a nickel cadmium battery. However, in the case of a lead-acid battery, the SOC value is preferably 30% or more in consideration of deterioration due to sulfation. Further, in the case of nickel metal hydride or two-cadmium batteries, the SOC value is desirably 20% or more in consideration of deterioration due to self-discharge.
本発明に係る二次電池の電池電源装置は、携帯型パーソナルコンピュータやデジタルカメラ、ビデオカメラ、携帯電話機等の電子機器、電気自動車やハイブリッドカー等の車両、ハイブリッドエレベータ、太陽電池や発電装置と二次電池とを組み合わされた電源システム、無停電源装置等の電池電源システム等の機器において、好適に利用することができる。 The battery power supply device of the secondary battery according to the present invention includes a portable personal computer, a digital camera, a video camera, a mobile phone and other electronic devices, an electric vehicle and a hybrid car, a hybrid elevator, a solar cell and a power generator. It can be suitably used in devices such as a power supply system combined with a secondary battery and a battery power supply system such as a non-stop power supply.
１ 電池電源システム
２ 電池パック
３ 機器本体
４ 二次電池
５ 充放電制御回路
６ 電流検出抵抗
１１，１２，１３，３１，３２，３３ 接続端子
３４ 負荷回路
３５ 充電部
３６，５４ 通信部
３７，５０ 制御部
３８ 表示部
５１ 電圧検出部
５２ 電流検出部
５０１ ＳＯＣ算出部
５０２ 長期停止スイッチ
Ｑ１，Ｑ２ スイッチング素子
DESCRIPTION OF SYMBOLS 1 Battery power supply system 2 Battery pack 3 Equipment main body 4 Secondary battery 5 Charge / discharge control circuit 6 Current detection resistance 11, 12, 13, 31, 32, 33 Connection terminal 34 Load circuit 35 Charging part 36,54 Communication part 37,50 Control unit 38 Display unit 51 Voltage detection unit 52 Current detection unit 501 SOC calculation unit 502 Long-term stop switch Q1, Q2 Switching element
Claims (4)
前記二次電池の満充電容量に対する充電量の比率（ＳＯＣ）を検出する検出手段と、前記充電部から前記二次電池への充電を制御する制御手段と、前記二次電池から前記負荷回路への放電を制御する制御手段とを備えた充放電制御回路をさらに備え、
前記充放電制御回路は、長期間停止を意味する停止信号を受信した場合、前記充電部からの充電を停止し、かつ、前記検出手段により検出されたＳＯＣが所定のＳＯＣ目標値以下になるまで放電を行い、前記ＳＯＣ目標値以下になった時、放電を停止することを特徴とする電池電源システム。 In a battery power supply system comprising a charging unit, a secondary battery, and a load circuit that can be driven by the secondary battery,
Detection means for detecting a ratio (SOC) of a charge amount to a full charge capacity of the secondary battery, control means for controlling charging from the charging unit to the secondary battery, and from the secondary battery to the load circuit A charge / discharge control circuit comprising a control means for controlling the discharge of
When the charge / discharge control circuit receives a stop signal indicating a stop for a long period of time, the charge / discharge control circuit stops charging from the charging unit, and the SOC detected by the detecting means is equal to or lower than a predetermined SOC target value. A battery power supply system that discharges and stops discharging when the SOC is equal to or less than the SOC target value.
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| WO2015098908A1 (en) | 2013-12-27 | 2015-07-02 | 日東電工株式会社 | Circuit device, portable device, and charging system and the like |
| JP2019208338A (en) * | 2018-05-30 | 2019-12-05 | トヨタ自動車株式会社 | Electric vehicle |
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| JP2008092710A (en) * | 2006-10-03 | 2008-04-17 | Canon Inc | Battery voltage controller, battery voltage control method, and computer program |
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| JPH07130397A (en) * | 1993-10-29 | 1995-05-19 | Sanyo Electric Co Ltd | Secondary battery protecting method and device therefor |
| JP2002315214A (en) * | 2001-04-12 | 2002-10-25 | Hitachi Maxell Ltd | Charger and portable small-sized electrical apparatus provided with the charger |
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| WO2015098908A1 (en) | 2013-12-27 | 2015-07-02 | 日東電工株式会社 | Circuit device, portable device, and charging system and the like |
| KR20160105287A (en) | 2013-12-27 | 2016-09-06 | 닛토덴코 가부시키가이샤 | Circuit device, portable device, and charging system and the like |
| JP2019208338A (en) * | 2018-05-30 | 2019-12-05 | トヨタ自動車株式会社 | Electric vehicle |
| JP7187822B2 (en) | 2018-05-30 | 2022-12-13 | トヨタ自動車株式会社 | electric vehicle |
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