JP5742998B2 - Charging time estimation device and charging time estimation method - Google Patents

Charging time estimation device and charging time estimation method Download PDF

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JP5742998B2
JP5742998B2 JP2014079198A JP2014079198A JP5742998B2 JP 5742998 B2 JP5742998 B2 JP 5742998B2 JP 2014079198 A JP2014079198 A JP 2014079198A JP 2014079198 A JP2014079198 A JP 2014079198A JP 5742998 B2 JP5742998 B2 JP 5742998B2
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洋史 矢倉
洋史 矢倉
佐藤　浩二
浩二 佐藤
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本発明は、二次電池の充電所要時間を推定する充電時間推定装置および充電時間推定方法に関し、特に、充電器から定電流充電および定電圧充電を受けて充電される二次電池の充電時間推定装置および充電時間推定方法に関する。   The present invention relates to a charging time estimation device and a charging time estimation method for estimating a required charging time of a secondary battery, and in particular, estimation of a charging time of a secondary battery that is charged by receiving constant current charging and constant voltage charging from a charger. The present invention relates to a device and a charging time estimation method.

従来、電気自動車やプラグインハイブリット自動車などの電動車には、大容量のリチウムイオン電池が駆動用バッテリとして搭載されている。一般的に、リチウムイオン電池は、電池電圧が低い間は電流値を一定にした定電流充電（ＣＣ充電）をおこない、電池電圧が所定値まで上昇すると電圧値を一定にした定電圧充電（ＣＶ充電）に切り替える定電流−定電圧充電（ＣＣＣＶ充電）がおこなわれている。   Conventionally, large-capacity lithium ion batteries are mounted as driving batteries in electric vehicles such as electric vehicles and plug-in hybrid vehicles. Generally, a lithium ion battery performs constant current charging (CC charging) with a constant current value while the battery voltage is low, and constant voltage charging (CV) with a constant voltage value when the battery voltage rises to a predetermined value. Constant current-constant voltage charging (CCCV charging) is performed.

たとえば、下記特許文献１では、定電流−定電圧充電をおこなう場合において、定電流制御の開始時におけるバッテリの充電率を検出する充電率検出手段と、定電流制御の開始時からの経過時間を計測する経過時間計測手段と、充電率検出手段で検出された該充電率に基づいて該定電流制御のタイムアウト時間を設定するタイムアウト設定手段と、該定電流制御時において、経過時間計測手段で計測された該経過時間がタイムアウト設定手段で設定された該タイムアウト時間を超えたときにバッテリへ供給される該電流を遮断する電流遮断手段とを備えることによって、バッテリ充電時における過充電を防止する技術が開示されている。   For example, in Patent Document 1 below, when performing constant current-constant voltage charging, charging rate detection means for detecting a charging rate of a battery at the start of constant current control, and elapsed time from the start of constant current control are described. An elapsed time measuring means for measuring, a timeout setting means for setting a timeout time for the constant current control based on the charging rate detected by the charging rate detecting means, and an elapsed time measuring means at the time of the constant current control A technique for preventing overcharging at the time of battery charging by providing current interrupting means for interrupting the current supplied to the battery when the elapsed time exceeds the timeout time set by the timeout setting means Is disclosed.

特許第４９４６７４９号公報Japanese Patent No. 4946749

上述した電動車などのバッテリ（二次電池）を充電する場合、充電完了までに時間がかかるため、充電所要時間の推定をおこない、これを表示することによってユーザビリティの向上を図っている。充電所要時間の推定には、二次電池に供給される電流や電圧の値、電池容量（最大電池容量や残存電池容量）などが用いられる。しかしながら、充電中に供給される電流や電圧は二次電池内の内部抵抗の大きさなどによって変動し、また、最大電池容量の値は電池劣化などによって低下する。このため、従来技術にかかる充電時間の推定方法では、充電時間の推定精度が低くなってしまうという問題点がある。   When a battery (secondary battery) such as the above-described electric vehicle is charged, it takes time until the charging is completed. Therefore, the time required for charging is estimated and displayed, thereby improving usability. For estimation of the time required for charging, the value of current and voltage supplied to the secondary battery, the battery capacity (maximum battery capacity and remaining battery capacity), and the like are used. However, the current and voltage supplied during charging vary depending on the size of the internal resistance in the secondary battery, and the maximum battery capacity value decreases due to battery deterioration. For this reason, the charging time estimation method according to the conventional technique has a problem that the estimation accuracy of the charging time is lowered.

本発明は、上述した従来技術の問題点に鑑みてなされたものであり、二次電池の充電所要時間の推定精度を向上させることを目的とする。   The present invention has been made in view of the above-described problems of the prior art, and an object thereof is to improve the estimation accuracy of the required charging time of a secondary battery.

上述した問題を解決し、目的を達成するため、請求項１の発明にかかる充電時間推定装置は、充電器から定電流充電および定電圧充電を受けて充電される二次電池の充電所要時間を推定する充電時間推定装置であって、前記二次電池の残存電池容量情報を取得する電池容量情報取得手段と、前記二次電池に供給される充電電流の電流値情報を取得する電流値情報取得手段と、前記残存電池容量情報を用いて、前記二次電池の定電流充電時間の基本推定値および定電圧充電時間の基本推定値を算出する基本推定値算出手段と、前記電流値情報を用いて、前記定電流充電時間の基本推定値および前記定電圧充電時間の基本推定値に対して補正をおこない、前記補正後の前記定電流充電時間の基本推定値および前記補正後の前記定電圧充電時間の基本推定値の和を前記充電所要時間として算出する充電所要時間算出手段と、を備え、前記充電器が前記定電流充電に代えて定電力充電をおこなう場合、前記充電所要時間算出手段は、前記補正後の前記定電流充電時間の基本推定値を用いて定電力充電時間を算出し、前記定電力充電時間および前記補正後の前記定電圧充電時間の基本推定値の和を前記充電所要時間として算出する、ことを特徴とする。
請求項２の発明にかかる充電時間推定装置は、前記二次電池の電圧値情報を取得する電圧値情報取得手段をさらに備え、前記充電所要時間算出手段は、充電開始時に前記電圧値情報取得手段によって取得した開始電圧値および前記定電力充電から前記定電圧充電への移行電圧値を用いて前記定電力充電時間を算出することを特徴とする。
請求項３の発明にかかる充電時間推定装置は、前記二次電池の最大電池容量の劣化状態情報を取得する劣化状態情報取得手段を備え、前記充電所要時間算出手段は、前記電流値情報および前記劣化状態情報を用いて、前記定電流充電時間の基本推定値および前記定電圧充電時間の基本推定値に対して補正をおこない、前記補正後の前記定電流充電時間の基本推定値および前記補正後の前記定電圧充電時間の基本推定値の和を前記充電所要時間として算出することを特徴とする。
請求項４の発明にかかる充電時間推定装置は、前記充電所要時間算出手段は、前記定電流充電時間の基本推定値および前記定電圧充電時間の基本推定値に対して、前記充電器から前記二次電池に供給される充電電流の基準値を前記二次電池に実際に供給される充電電流の実電流値で除した係数と、前記二次電池の最大電池容量の現在値を前記二次電池の最大電池容量の初期値で除した係数と、をかけ合わせることにより、前記補正をおこなうことを特徴とする。
請求項５の発明にかかる充電時間推定方法は、充電器から定電流充電および定電圧充電を受けて充電される二次電池の充電所要時間を推定する充電時間推定方法であって、前記二次電池の残存電池容量情報を用いて、前記二次電池への定電流充電時間の基本推定値および定電圧充電時間の基本推定値を算出する充電時間算出工程と、前記二次電池に供給される充電電流の電流値情報を用いて、前記定電流充電時間の基本推定値および前記定電圧充電時間の基本推定値に対して補正をおこない、前記補正後の前記定電流充電時間の基本推定値および前記補正後の前記定電圧充電時間の基本推定値の和を前記充電所要時間として算出する充電所要時間算出工程と、を含み、前記充電所要時間算出工程では、前記充電器が前記定電流充電に代えて定電力充電をおこなう場合、前記補正後の前記定電流充電時間の基本推定値を用いて定電力充電時間を算出し、前記定電力充電時間および前記補正後の前記定電圧充電時間の基本推定値の和を前記充電所要時間として算出する、ことを特徴とする。 In order to solve the above-described problems and achieve the object, the charging time estimation device according to the invention of claim 1 determines the charging time of a secondary battery to be charged by receiving constant current charging and constant voltage charging from a charger. A charging time estimation device for estimating battery capacity information acquisition means for acquiring remaining battery capacity information of the secondary battery, and current value information acquisition for acquiring current value information of a charging current supplied to the secondary battery Means, basic estimated value calculating means for calculating a basic estimated value of constant current charging time and a basic estimated value of constant voltage charging time of the secondary battery using the remaining battery capacity information, and using the current value information The basic estimated value of the constant current charging time and the basic estimated value of the constant voltage charging time are corrected, and the corrected basic estimated value of the constant current charging time and the corrected constant voltage charging are performed. Time base Comprising a charge required time calculation means for calculating the sum of the estimated value as the time required for charging, and when the charger performs constant power charging instead of the constant current charging, the time required for charging calculating means, the correction A constant power charging time is calculated using a basic estimated value of the constant current charging time later, and a sum of the basic estimated value of the constant power charging time and the corrected constant voltage charging time is calculated as the required charging time. It is characterized by.
The charging time estimation device according to the invention of claim 2 further includes voltage value information acquisition means for acquiring voltage value information of the secondary battery, and the required charging time calculation means is configured to acquire the voltage value information at the start of charging. The constant power charging time is calculated using the start voltage value obtained by the above and the transition voltage value from the constant power charging to the constant voltage charging.
The charging time estimation device according to a third aspect of the present invention includes deterioration state information acquisition means for acquiring deterioration state information of the maximum battery capacity of the secondary battery, and the required charging time calculation means includes the current value information and the current value information. Using the deterioration state information, the basic estimated value of the constant current charging time and the basic estimated value of the constant voltage charging time are corrected, and the corrected basic estimated value of the constant current charging time and the corrected The sum of basic estimated values of the constant voltage charging time is calculated as the required charging time.
According to a fourth aspect of the present invention, there is provided a charging time estimation apparatus, wherein the required charging time calculation means is configured such that the charging unit calculates the basic estimated value of the constant current charging time and the basic estimated value of the constant voltage charging time from the charger. A coefficient obtained by dividing the reference value of the charging current supplied to the secondary battery by the actual current value of the charging current actually supplied to the secondary battery, and the current value of the maximum battery capacity of the secondary battery are the secondary battery. The correction is performed by multiplying by the coefficient divided by the initial value of the maximum battery capacity.
The charging time estimation method according to the invention of claim 5 is a charging time estimation method for estimating a required charging time of a secondary battery to be charged by receiving constant current charging and constant voltage charging from a charger, wherein the secondary time A charging time calculation step of calculating a basic estimated value of a constant current charging time and a basic estimated value of a constant voltage charging time to the secondary battery using the remaining battery capacity information of the battery, and is supplied to the secondary battery Using the current value information of the charging current, the basic estimated value of the constant current charging time and the basic estimated value of the constant voltage charging time are corrected, and the basic estimated value of the constant current charging time after the correction and A charge required time calculating step of calculating a sum of the basic estimated values of the constant voltage charge time after the correction as the required charge time. In the required charge time calculating step, the charger performs the constant current charging. Instead When power charging is performed, a constant power charging time is calculated using the basic estimated value of the constant current charging time after the correction, and the basic estimated value of the constant power charging time and the corrected constant voltage charging time are calculated. The sum is calculated as the required charging time.

本発明によれば、二次電池に実際に供給される電流量および二次電池の劣化度合いを考慮して精度よく充電所要時間を推定することができる。
本発明によれば、定電力充電がおこなわれる場合には、補正後の定電流充電時間の基本推定値を用いて定電力充電時間を算出し、定電力充電時間および補正後の定電圧充電時間の基本推定値の和を充電所要時間として算出するので、充電器側の状態（電源からの電力供給状況など）を考慮して、より精度よく充電所要時間を推定することができる。
本発明によれば、定電流充電時間を元にして定電力充電時間を推定することができ、電流および電圧が刻々と変化する定電力充電の所要時間を簡便に推定することができる。
本発明によれば、定電流充電時間および定電圧充電時間の基本推定値に対して、充電器から二次電池に供給される充電電流の基準値を二次電池に実際に供給される充電電流の実電流値で除した係数と、二次電池の最大電池容量の現在値を二次電池の最大電池容量の初期値で除した係数と、をかけ合わせることにより補正をおこなうので、二次電池の状態を反映して充電所要時間の算出をおこなうことができる。 According to the present invention, it is possible to accurately estimate the required charging time in consideration of the amount of current actually supplied to the secondary battery and the degree of deterioration of the secondary battery.
According to the present invention, when constant power charging is performed, the constant power charging time is calculated using the basic estimated value of the corrected constant current charging time, and the constant power charging time and the corrected constant voltage charging time are calculated. Therefore, the required charging time can be estimated more accurately in consideration of the state on the charger side (such as the power supply status from the power source).
According to the present invention, it is possible to estimate the constant power charging time based on the constant current charging time, and it is possible to easily estimate the time required for constant power charging in which the current and voltage change every moment.
According to the present invention, with respect to the basic estimated values of the constant current charging time and the constant voltage charging time, the charging current actually supplied to the secondary battery is set to the reference value of the charging current supplied from the charger to the secondary battery. The correction is made by multiplying the coefficient divided by the actual current value of the battery and the coefficient obtained by dividing the current value of the maximum battery capacity of the secondary battery by the initial value of the maximum battery capacity of the secondary battery. The time required for charging can be calculated by reflecting the state.

実施の形態にかかる充電時間推定装置１０の機能的構成を示すブロック図である。It is a block diagram which shows the functional structure of the charging time estimation apparatus 10 concerning embodiment. 充電時間推定装置１０の配置例を示す説明図である。3 is an explanatory diagram illustrating an arrangement example of a charging time estimation device 10. FIG. バッテリ２０６の充電方法について説明するためのグラフである。6 is a graph for explaining a method for charging battery 206; 充電時間推定装置１０の処理に用いられる数式群である。It is a mathematical formula group used for processing of the charging time estimation device 10. 図４の式（６）の右式を模式的に示す説明図である。It is explanatory drawing which shows typically the right type | formula of Formula (6) of FIG. 充電時間推定装置１０による充電時間推定処理の手順を示すフローチャートである。4 is a flowchart illustrating a procedure of a charging time estimation process performed by the charging time estimation device 10;

以下に添付図面を参照して、本発明にかかる充電時間推定装置および充電時間推定方法の好適な実施の形態を詳細に説明する。   Exemplary embodiments of a charging time estimation device and a charging time estimation method according to the present invention will be explained below in detail with reference to the accompanying drawings.

（実施の形態）
図１は、実施の形態にかかる充電時間推定装置１０の機能的構成を示すブロック図、図２は、充電時間推定装置１０の配置例を示す説明図である。本実施の形態では、充電時間推定装置１０によって、電動車に搭載された二次電池（バッテリ）の充電をおこなう際の所要時間を推定する場合について説明する。 (Embodiment)
FIG. 1 is a block diagram illustrating a functional configuration of a charging time estimation device 10 according to the embodiment, and FIG. 2 is an explanatory diagram illustrating an arrangement example of the charging time estimation device 10. In the present embodiment, a case will be described in which the charging time estimation device 10 estimates a required time for charging a secondary battery (battery) mounted on an electric vehicle.

図２に示すように、本実施の形態では、充電時間推定装置１０は、電動車２０の車内に搭載されている。図２Ａは家庭用電源を用いた普通充電をおこなう場合の配置例、図２Ｂは急速充電器を用いた急速充電をおこなう場合の配置例をそれぞれ示している。
普通充電をおこなう場合は（図２Ａ）、家庭用コンセントＥから外部電力の供給を受けた充電ガンＧを充電口２０２に挿入して充電をおこなう。充電ガンＧから供給された電力は、車載充電器２０４を介してバッテリ２０６に蓄電される。充電時間推定装置１０は、車載充電器２０４およびバッテリ２０６から情報に基づいて充電所要時間の推定をおこない、推定結果をメータ２０８に表示させる。 As shown in FIG. 2, in the present embodiment, charging time estimation device 10 is mounted in the electric vehicle 20. FIG. 2A shows an arrangement example in the case of performing normal charging using a household power supply, and FIG. 2B shows an arrangement example in the case of performing quick charging using a quick charger.
When normal charging is performed (FIG. 2A), charging is performed by inserting a charging gun G that is supplied with external power from a household outlet E into the charging port 202. The electric power supplied from the charging gun G is stored in the battery 206 via the in-vehicle charger 204. The charging time estimation device 10 estimates the required charging time based on information from the in-vehicle charger 204 and the battery 206 and causes the meter 208 to display the estimation result.

急速充電をおこなう場合は（図２Ｂ）、高電圧電流を供給する急速充電器Ｑから電力の供給を受けた充電ガンＧを充電口２０２に挿入して充電をおこなう。充電ガンＧから供給された電力は、そのままバッテリ２０６に蓄電される。充電時間推定装置１０は、急速充電器Ｑおよびバッテリ２０６から情報に基づいて充電所要時間の推定をおこない、推定結果をメータ２０８に表示させる。なお、急速充電器Ｑと充電時間推定装置１０との通信は、たとえば充電ガンＧに接続されたケーブルを介しておこなえばよい。   When quick charging is performed (FIG. 2B), charging is performed by inserting a charging gun G that is supplied with power from the quick charger Q that supplies high voltage current into the charging port 202. The electric power supplied from the charging gun G is stored in the battery 206 as it is. The charging time estimation device 10 estimates the required charging time based on information from the quick charger Q and the battery 206 and causes the meter 208 to display the estimation result. Communication between the quick charger Q and the charging time estimation device 10 may be performed via a cable connected to the charging gun G, for example.

なお、充電時間推定装置１０は、たとえばＣＰＵ、制御プログラムなどを格納・記憶するＲＯＭ、制御プログラムの作動領域としてのＲＡＭ、各種データを書き換え可能に保持するＥＥＰＲＯＭ、周辺回路等とのインターフェースをとるインターフェース部などを含んで構成されるＥＶ−ＥＣＵにおいて、上記ＣＰＵが上記制御プログラムを実行することによって実現することができる。   The charging time estimation device 10 includes, for example, a CPU, a ROM that stores and stores a control program, a RAM as an operation area of the control program, an EEPROM that holds various data in a rewritable manner, and an interface that interfaces with peripheral circuits and the like. In the EV-ECU configured to include a unit or the like, it can be realized by the CPU executing the control program.

また、本実施の形態では、普通充電および急速充電ともに、バッテリ電圧が低い間は電流値を一定にした定電流充電（ＣＣ充電）をおこない、バッテリ電圧が所定値まで上昇すると電圧値を一定にした定電圧充電（ＣＶ充電）に切り替える定電流−定電圧充電（ＣＣＣＶ充電）をおこなうものとする。ただし、充電器からの出力が足りず、定電流充電をおこなうことができない場合は、定電流充電に代えて、各時刻における電流値（Ｉ）と電圧値（Ｖ）の積を一定にした定電力充電（ＣＰ充電）をおこなうものとする。   In this embodiment, constant current charging (CC charging) is performed while the battery voltage is low, and constant voltage charging (CC charging) is performed while the battery voltage rises to a predetermined value. The constant current-constant voltage charging (CCCV charging) is switched to the constant voltage charging (CV charging). However, if the output from the charger is insufficient and constant current charging cannot be performed, instead of constant current charging, a constant product with a constant current value (I) and voltage value (V) at each time is used. Power charging (CP charging) shall be performed.

図３は、バッテリ２０６の充電方法について説明するためのグラフである。図３のグラフにおいて、左縦軸はバッテリ２０６に供給される電流値Ｉ、右縦軸はバッテリ２０６の電圧値およびＳＯＣ（Ｓｔａｔｅ Ｏｆ Ｃｈａｒｇｅ）、横軸は時刻Ｔを示す。また、図３には定電流−定電圧充電時における供給電流値ＣＣＣＶ、定電力−定電圧充電時における供給電流値ＣＰＣＶ、バッテリ電圧Ｖ、バッテリ２０６のＳＯＣ情報ＳＯＣを示している。なお、図示の便宜上、定電流−定電圧充電時における定電流充電時間ＴＣＣと定電力−定電圧充電時における定電力充電時間ＴＣＰ、定電流−定電圧充電時における定電圧充電時間ＴＣＶと定電力−定電圧充電時における定電圧充電時間ＴＣＶを、それぞれ同一であるものとして図示している。 FIG. 3 is a graph for explaining a charging method of the battery 206. In the graph of FIG. 3, the left vertical axis indicates the current value I supplied to the battery 206, the right vertical axis indicates the voltage value and SOC (State Of Charge) of the battery 206, and the horizontal axis indicates time T. 3 shows a supply current value CCCV at the time of constant current-constant voltage charging, a supply current value CPCV at the time of constant power-constant voltage charging, a battery voltage V, and SOC information SOC of the battery 206. For convenience of illustration, a constant current charging time T CC during constant current-constant voltage charging, a constant power charging time T CP during constant power-constant voltage charging, and a constant voltage charging time T CV during constant current-constant voltage charging. a constant power - constant voltage charge time during a constant voltage charging T CV, are shown as being respectively the same.

定電流−定電圧充電ＣＣＣＶの場合、充電開始後、バッテリ電圧が上限電圧Ｖｍａｘに達するまでは定電流充電をおこなう。図３に示すように、定電流充電時はバッテリ２０６に供給される電流値は一定である。バッテリ電圧が上限電圧Ｖｍａｘに達すると、定電圧充電に切り替える。定電圧充電時は、バッテリ２０６に供給される電流値はＳＯＣの上昇に反比例して減少する。そして、バッテリ２０６に供給される電流値がほぼ０（たとえば、あらかじめ定められた充電終了電流値）になると充電を終了する。すなわち、充電開始後、バッテリ電圧が上限電圧Ｖｍａｘに達するまでの時間が定電流充電時間ＴＣＣ、バッテリ電圧が上限電圧Ｖｍａｘに達してからバッテリ２０６に供給される電流値が充電終了電流値になるまでの時間が定電流充電時間ＴＣＶとなる。 Constant current - if the constant voltage charging CCCV, after start of charging until the battery voltage reaches the upper limit voltage V max performs constant current charging. As shown in FIG. 3, during constant current charging, the current value supplied to the battery 206 is constant. When the battery voltage reaches the upper limit voltage V max, switch to constant voltage charging. During constant voltage charging, the current value supplied to the battery 206 decreases in inverse proportion to the increase in SOC. Then, when the current value supplied to battery 206 becomes approximately 0 (for example, a predetermined charge end current value), charging is terminated. That is, after the start of charging time until the battery voltage reaches the upper limit voltage V max constant current charging time T CC, current charging completion current value battery voltage from reaching the upper limit voltage V max to the battery 206 The time until becomes the constant current charging time TCV .

定電力−定電圧充電ＣＰＣＶの場合も、充電開始後、バッテリ電圧が上限電圧Ｖｍａｘに達するまでは定電力充電をおこなう。ただし、図３に示すように、定電力充電時にはバッテリ２０６に供給される電流値は一定ではない。バッテリ電圧が上限電圧Ｖｍａｘに達すると、定電圧充電に切り替えて、バッテリ２０６に供給される電流値がほぼ０になると充電を終了する。すなわち、充電開始後、バッテリ電圧が上限電圧Ｖｍａｘに達するまでの時間が定電流充電時間ＴＣＰ、バッテリ電圧が上限電圧Ｖｍａｘに達してからバッテリ２０６に入る電流値が充電終了電流値になるまでの時間が定電圧充電時間ＴＣＶとなる。 Constant Power - even if the constant voltage charging CPCV, after start of charging until the battery voltage reaches the upper limit voltage V max performs constant power charging. However, as shown in FIG. 3, the current value supplied to the battery 206 is not constant during constant power charging. When the battery voltage reaches the upper limit voltage V max, switch to constant voltage charging, the current value supplied to the battery 206 has finished charging substantially to zero. That is, after the start of charging, the time until the battery voltage reaches the upper limit voltage V max constant current charging time T CP, the current value charge termination current entering the battery 206 from reaching the battery voltage is the upper limit voltage V max Is the constant voltage charging time TCV .

図１に示すように、充電時間推定装置１０は、電池温度情報取得手段１０２、電池容量情報取得手段１０４、電流値情報取得手段１０６、劣化状態情報取得手段１０８、電流基準値記憶手段１０９、判定手段１１０、基本推定値算出手段１１２、充電所要時間算出手段１１４によって構成される。   As shown in FIG. 1, the charging time estimation device 10 includes a battery temperature information acquisition unit 102, a battery capacity information acquisition unit 104, a current value information acquisition unit 106, a deterioration state information acquisition unit 108, a current reference value storage unit 109, a determination. A means 110, a basic estimated value calculating means 112, and a required charging time calculating means 114 are configured.

電池温度情報取得手段１０２は、二次電池（バッテリ２０６）の電池温度情報ｔｃｅｌｌを取得する。電池温度情報取得手段１０２は、たとえばバッテリ２０６の状態を制御するＢＭＵ（Ｂａｔｔｅｒｙ Ｍａｎａｇｅｍｅｎｔ Ｕｎｉｔ：図示なし）から電池温度情報ｔｃｅｌｌを取得する。電池温度情報ｔｃｅｌｌは、たとえば組電池であるバッテリ２０６を構成する個々のセルのセル温度の平均値などである。 The battery temperature information acquisition unit 102 acquires battery temperature information t cell of the secondary battery (battery 206). The battery temperature information acquisition unit 102 acquires the battery temperature information t cell from, for example, a BMU (Battery Management Unit: not shown) that controls the state of the battery 206. The battery temperature information t cell is, for example, an average value of cell temperatures of individual cells constituting the battery 206 that is an assembled battery.

電池容量情報取得手段１０４は、二次電池（バッテリ２０６）の残存電池容量情報ＳＯＣを取得する。残存電池容量情報とは、たとえばＳＯＣ（Ｓｔａｔｅ Ｏｆ Ｃｈａｒｇｅ）情報であり、バッテリ２０６の全電池容量に対する現在使用できる電池容量の割合を示す。残存電池容量情報ＳＯＣは、たとえばバッテリ２０６の電圧と残存電池容量との関係を示すマップから推定することができる。電池容量情報取得手段１０４は、たとえば上記ＢＵＭから残存電池容量情報ＳＯＣを取得する。   The battery capacity information acquisition unit 104 acquires the remaining battery capacity information SOC of the secondary battery (battery 206). The remaining battery capacity information is, for example, SOC (State Of Charge) information, and indicates the ratio of the battery capacity that can be currently used to the total battery capacity of the battery 206. The remaining battery capacity information SOC can be estimated from a map showing the relationship between the voltage of the battery 206 and the remaining battery capacity, for example. The battery capacity information acquisition unit 104 acquires the remaining battery capacity information SOC from the BUM, for example.

電流値情報取得手段１０６は、二次電池（バッテリ２０６）に供給される充電電流の電流値情報Ｉを取得する。電流値情報取得手段１０６は、たとえば車載充電器２０４または急速充電器Ｑから電流値情報Ｉを取得する。車載充電器２０４または急速充電器Ｑから供給される電流量はあらかじめ理想値（後述する基本電流値Ｉｉｎｔ）（充電電流の基準値）として電流基準値記憶手段１０９にて記憶されているが、電源の状態によって電流量が変動する場合がある。電流値情報取得手段１０６は、車載充電器２０４または急速充電器Ｑから実際に供給される電流量の情報を電流値情報Ｉとして取得する。 The current value information acquisition unit 106 acquires current value information I of the charging current supplied to the secondary battery (battery 206). The current value information acquisition unit 106 acquires the current value information I from the in-vehicle charger 204 or the quick charger Q, for example. The amount of current supplied from the in-vehicle charger 204 or the quick charger Q is stored in advance in the current reference value storage means 109 as an ideal value (basic current value I int described later) (reference value of charging current). The amount of current may vary depending on the state of the power supply. The current value information acquisition unit 106 acquires, as current value information I, information on the amount of current actually supplied from the in-vehicle charger 204 or the quick charger Q.

劣化状態情報取得手段１０８は、二次電池（バッテリ２０６）の最大電池容量の劣化状態情報を取得する。一般的にバッテリ２０６は、充放電を繰り返すことによって最大電池容量が減少する。劣化状態情報取得手段１０８は、たとえば現在のバッテリ２０６の最大電池容量ＰをＢＭＵから取得して、使用開始直後のバッテリ２０６の最大電池容量を初期値（後述する初期最大電池容量Ｐｉｎｔ）と比較することによって、劣化状態情報を取得する。 The deterioration state information acquisition unit 108 acquires deterioration state information of the maximum battery capacity of the secondary battery (battery 206). In general, the battery 206 has a maximum battery capacity that is reduced by repeated charging and discharging. The deterioration state information acquisition unit 108 acquires, for example, the current maximum battery capacity P of the battery 206 from the BMU, and compares the maximum battery capacity of the battery 206 immediately after the start of use with an initial value (initial maximum battery capacity P int described later). By doing so, the deterioration state information is acquired.

判定手段１１０は、二次電池（バッテリ２０６）への定電流充電が可能か否かを判断する。判定手段１１０は、たとえば電流値情報取得手段１０６が取得した電流値情報Ｉを参照して、定電流充電が可能な程度の電流量が継続して得られるか否かを判断することによって、定電流充電が可能か否かを判断する。また、判定手段１１０は、車載充電器２０４または急速充電器Ｑから直接電流値情報を取得して上記判断をおこなってもよい。   Determination means 110 determines whether or not constant current charging of the secondary battery (battery 206) is possible. The determination unit 110 refers to the current value information I acquired by the current value information acquisition unit 106, for example, and determines whether or not a current amount sufficient for constant current charging can be continuously obtained. It is determined whether or not current charging is possible. Moreover, the determination means 110 may acquire the current value information directly from the in-vehicle charger 204 or the quick charger Q and make the above determination.

基本推定値算出手段１１２は、電池温度情報ｔｃｅｌｌおよび残存電池容量情報ＳＯＣを用いて、二次電池（バッテリ２０６）への定電流充電時間ＴＣＣおよび定電圧充電時間ＴＣＶの基本推定値Ｔｉｎｔ（Ｔｉｎｔ＿ｃｃ，Ｔｉｎｔ＿ｃｖ）を算出する。基本推定値Ｔｉｎｔ＿ｃｃ，Ｔｉｎｔ＿ｃｖに対して後述する充電所要時間算出手段１１４による補正をおこなった値が定電流充電時間ＴＣＣおよび定電圧充電時間ＴＣＶとなる。 The basic estimated value calculating means 112 uses the battery temperature information t cell and the remaining battery capacity information SOC, and the basic estimated value T of the constant current charging time T CC and the constant voltage charging time T CV to the secondary battery (battery 206). int ( Tint_cc , Tint_cv ) is calculated. Values obtained by correcting the basic estimated values T int_cc and T int_cv by the required charging time calculation unit 114 described later become the constant current charging time T CC and the constant voltage charging time T CV .

ここで、バッテリ２０６の充電所要時間ＴＣＨＧは、定電流‐定電圧充電をおこなう場合、図４の式（１）で示すことができる。また、定電力‐定電圧充電をおこなう場合、充電所要時間ＴＣＨＧは、図４の式（２）で示すことができる。 Here, the required charging time T CHG of the battery 206 can be expressed by equation (1) in FIG. 4 when performing constant current-constant voltage charging. Further, when performing constant power-constant voltage charging, the required charging time T CHG can be expressed by the equation (2) in FIG.

基本推定値算出手段１１２は、定電流充電時間ＴＣＣの基本推定値Ｔｉｎｔ＿ｃｃおよび定電圧充電時間ＴＣＶの基本推定値Ｔｉｎｔ＿ｃｖを、それぞれ電池温度情報ｔｃｅｌｌおよび残存電池容量情報ＳＯＣを用いて算出する。電池温度情報ｔｃｅｌｌおよび残存電池容量情報ＳＯＣを用いた基本推定値Ｔｉｎｔ＿ｃｃ，Ｔｉｎｔ＿ｃｖの算出方法（Ｔｉｎｔ＿ｃｃ（ｔｃｅｌｌ，ＳＯＣ），Ｔｉｎｔ＿ｃｖ（ｔｃｅｌｌ，ＳＯＣ））は、従来公知の様々な方法を適用可能である。 Basic estimated value calculating means 112, the basic estimated value T Int_cv basic estimate T Int_cc and constant-voltage charge time T CV constant current charging time T CC, respectively, using the battery temperature information t cell and the remaining battery capacity information SOC calculate. There are various conventionally known calculation methods (T int_cc (t cell , SOC), T int_cv (t cell , SOC)) of basic estimated values T int_cc and T int_cv using the battery temperature information t cell and the remaining battery capacity information SOC. Various methods can be applied.

充電所要時間算出手段１１４は、電流値情報Ｉおよび劣化状態情報を用いて、定電流充電時間ＴＣＣの基本推定値Ｔｉｎｔ＿ｃｃおよび定電圧充電時間ＴＣＶの基本推定値Ｔｉｎｔ＿ｃｖに対して補正をおこない、定電流充電時間ＴＣＣおよび定電圧充電時間ＴＣＶの和を充電所要時間ＴＣＨＧとして算出する。 Charge required time calculation unit 114, by using the current value information I and the degraded state information, correcting the basic estimated value T Int_cv basic estimate T Int_cc and the constant voltage charging time T CV of the constant current charging time T CC Then, the sum of the constant current charging time T CC and the constant voltage charging time T CV is calculated as the required charging time T CHG .

充電所要時間算出手段１１４は、定電流充電時間ＴＣＣの基本推定値Ｔｉｎｔ＿ｃｃおよび定電圧充電時間ＴＣＶの基本推定値Ｔｉｎｔ＿ｃｖに対して、二次電池（バッテリ２０６）に供給される充電電流の理想値（基本電流値Ｉｉｎｔ）を二次電池に実際に供給される充電電流の電流値で除した係数と、二次電池（バッテリ）の最大電池容量の現在値（現在の最大電池容量Ｐ）を二次電池の最大電池容量の初期値（初期最大電池容量Ｐｉｎｔ）で除した係数と、をかけ合わせることにより、補正をおこなう。すなわち、充電所要時間算出手段１１４は、図４の式（３）および式（４）に示す式によって、定電流充電時間ＴＣＣの基本推定値Ｔｉｎｔ＿ｃｃおよび定電圧充電時間ＴＣＶの基本推定値Ｔｉｎｔ＿ｃｖに対して補正をおこない、定電流充電時間ＴＣＣおよび定電圧充電時間ＴＣＶを算出する。そして、図４の式（１）によって充電所要時間ＴＣＨＧを算出する。 The charging time calculation means 114 is a charging current supplied to the secondary battery (battery 206) with respect to the basic estimated value T int_cc of the constant current charging time T CC and the basic estimated value T int_cv of the constant voltage charging time T CV. Of the ideal value (basic current value I int ) divided by the current value of the charging current actually supplied to the secondary battery, and the current value of the maximum battery capacity of the secondary battery (battery) (current maximum battery capacity) The correction is performed by multiplying the coefficient obtained by dividing P) by the initial value of the maximum battery capacity of the secondary battery (initial maximum battery capacity P int ). That is, the required charging time calculation means 114 calculates the basic estimated value T int_cc of the constant current charging time T CC and the basic estimated value of the constant voltage charging time T CV according to the equations shown in the equations (3) and (4) of FIG. Correction is performed on T int_cv to calculate a constant current charging time T CC and a constant voltage charging time T CV . Then, the required charging time T CHG is calculated by the equation (1) in FIG.

また、充電所要時間算出手段１１４は、判定手段１１０によって二次電池（バッテリ２０６）への定電流充電が不可能と判断された場合には、定電流充電時間ＴＣＣを用いて定電力充電時間ＴＣＰを算出する。具体的には、充電開始時（充電所要時間の推定時）におけるバッテリ電圧をＶ１（開始電圧値）、定電力充電から定電圧充電への移行電圧（図３における上限電圧Ｖｍａｘ）をＶ２（移行電圧値）とする。なお、開始電圧値Ｖ１および移行電圧値Ｖ２は、二次電池の電圧値情報を取得する電圧値情報取得手段（図示なし）によって取得する。定電力充電では電流と電圧の積が一定であるため、充電開始時における供給電流をＩ１、定電力充電から定電圧充電への移行時における供給電流をＩ２とすると、図４の式（５）が成立する。 Further, when the determination unit 110 determines that constant current charging to the secondary battery (battery 206) is impossible, the charge required time calculation unit 114 uses the constant current charging time TCC to perform the constant power charging time. to calculate the T CP. Specifically, the battery voltage at the start of charging (when the required charging time is estimated) is V 1 (starting voltage value), and the transition voltage from constant power charging to constant voltage charging (upper limit voltage V max in FIG. 3) is V. 2 (transition voltage value). The start voltage value V 1 and shifts the voltage value V 2 is obtained by the voltage value information acquisition means for acquiring a voltage value information of the secondary battery (not shown). In constant power charging, since the product of current and voltage is constant, if the supply current at the start of charging is I 1 and the supply current at the time of transition from constant power charging to constant voltage charging is I 2 , the equation ( 5) is established.

また、同一条件下で充電をおこなう場合、定電力充電または定電流充電のいずれをおこなっても、定電圧充電に移行するまでに充電される電力量はほぼ等しくなる。図４の式（６）の左式は、定電圧充電に移行するまでに充電される電力量は、各時刻における電流値を時間積分することで算出できることを示す。上述のように、定電力充電または定電流充電のいずれをおこなっても、定電圧充電ＣＶに移行するまでに充電される電力量はほぼ等しくなることから、図４の式（６）の左式の関係が成立する。   In addition, when charging is performed under the same conditions, the amount of power charged before shifting to constant voltage charging is approximately equal regardless of whether constant power charging or constant current charging is performed. The left equation of equation (6) in FIG. 4 indicates that the amount of power charged before shifting to constant voltage charging can be calculated by time-integrating the current value at each time. As described above, the amount of electric power charged until the shift to the constant voltage charge CV becomes almost equal regardless of whether the constant power charge or the constant current charge is performed. Therefore, the left equation of the equation (6) in FIG. The relationship is established.

図５は、図４の式（６）の右式を模式的に示す説明図である。図５に示すグラフは、縦軸が電流、横軸が時刻を示す。時刻ＴＣＣは定電流充電ＣＣをおこなった場合の定電圧充電ＣＶへの移行時刻、すなわち定電流充電時間である。また、時刻ＴＣＰは定電力充電ＣＰをおこなった場合の定電圧充電ＣＶへの移行時刻、すなわち定電力充電時間である。定電流充電ＣＣではいずれの時刻においても電流値が一定であり、充電開始から時刻ＴＣＣまでに充電される電力量はＴＣＣ×Ｉ１（長方形の面積）として算出できる。一方、定電力充電ＣＰでは電流値は時刻によって変動する。電流値の変動を直線で近似すると、充電開始から時刻ＴＣＰまでに充電される電力量は、充電開始時における供給電流Ｉ１および定電力充電ＣＰから定電圧充電ＣＶへの移行時における供給電流Ｉ２を上底および下底、時刻ＴＣＰを高さとする台形の面積として算出できる。上述のように、同一条件下で充電をおこなう場合、定電力充電ＣＰまたは定電流充電ＣＣのいずれをおこなっても、定電圧充電ＣＶに移行するまでに充電される電力量はほぼ等しくなることから、定電流充電ＣＣの長方形の面積と定電力充電ＣＰの台形の面積は等しくなる。図４の式（６）の右式は以上のような関係を示している。 FIG. 5 is an explanatory diagram schematically showing the right expression of the expression (6) in FIG. In the graph shown in FIG. 5, the vertical axis represents current and the horizontal axis represents time. Time T CC is a transition time to constant voltage charge CV when constant current charge CC is performed, that is, constant current charge time. Further, the time T CP is a transition time to the constant voltage charge CV when the constant power charge CP is performed, that is, a constant power charge time. In constant current charging CC, the current value is constant at any time, and the amount of power charged from the start of charging to time T CC can be calculated as T CC × I 1 (rectangular area). On the other hand, in the constant power charging CP, the current value varies with time. When the fluctuation of the current value is approximated by a straight line, the amount of power charged from the start of charging to time T CP is the supply current I 1 at the start of charging and the supply current at the time of transition from the constant power charging CP to the constant voltage charging CV. It can be calculated as a trapezoidal area with I 2 as the upper and lower bases and time T CP as the height. As described above, when charging is performed under the same conditions, the amount of power charged before shifting to constant voltage charging CV is almost equal regardless of whether constant power charging CP or constant current charging CC is performed. The rectangular area of the constant current charge CC and the trapezoid area of the constant power charge CP are equal. The right equation of equation (6) in FIG. 4 shows the above relationship.

図４の式（５）および式（６）から、定電力充電時間ＴＣＰは定電流充電時間ＴＣＣを用いて、図４の式（７）のように算出することができる。 From the equations (5) and (6) in FIG. 4, the constant power charging time T CP can be calculated as the equation (7) in FIG. 4 using the constant current charging time T CC .

図６は、充電時間推定装置１０による充電時間推定処理の手順を示すフローチャートである。図６に示す処理は、たとえば電動車２０（図２参照）に充電ガンＧが挿入され、バッテリ２０６の充電が開始された直後におこなわれる。また、充電中も随時図６に示す処理をおこなって推定精度を向上させるようにしてもよい。   FIG. 6 is a flowchart showing the procedure of the charging time estimation process performed by the charging time estimation device 10. 6 is performed immediately after the charging gun G is inserted into the electric vehicle 20 (see FIG. 2) and charging of the battery 206 is started, for example. Further, the processing shown in FIG. 6 may be performed at any time during charging to improve the estimation accuracy.

図６のフローチャートにおいて、充電時間推定装置１０は、まず、電池温度情報取得手段１０２、電池容量情報取得手段１０４、電流値情報取得手段１０６および劣化状態情報取得手段１０８によって、バッテリ２０６の電池温度情報ｔｃｅｌｌ、残存電池容量情報ＳＯＣ、充電電流の電流値情報Ｉおよび劣化状態情報を取得する（ステップＳ６０１）。つぎに、充電時間推定装置１０は、基本推定値算出手段１１２によって、電池温度情報ｔｃｅｌｌおよび残存電池容量情報ＳＯＣを用いて、定電流充電時間ＴＣＣの基本推定値Ｔｉｎｔ＿ｃｃおよび定電圧充電時間ＴＣＶの基本推定値Ｔｉｎｔ＿ｃｖを算出する（ステップＳ６０２）。 In the flowchart of FIG. 6, the charging time estimation apparatus 10 first uses the battery temperature information acquisition unit 102, the battery capacity information acquisition unit 104, the current value information acquisition unit 106, and the deterioration state information acquisition unit 108 to obtain battery temperature information of the battery 206. t cell , remaining battery capacity information SOC, current value information I of charging current, and deterioration state information are acquired (step S601). Next, the charging time estimation device 10 uses the basic estimated value calculation means 112 to calculate the basic estimated value T int_cc of the constant current charging time T CC and the constant voltage charging time using the battery temperature information t cell and the remaining battery capacity information SOC. and calculates the basic estimated value T Int_cv of T CV (step S602).

つづいて、充電時間推定装置１０は、充電所要時間算出手段１１４によって、電流値情報Ｉおよび劣化状態情報を用いて、定電流充電時間ＴＣＣの基本推定値Ｔｉｎｔ＿ｃｃおよび定電圧充電時間ＴＣＶの基本推定値Ｔｉｎｔ＿ｃｖに対して補正をおこなって定電流充電時間ＴＣＣおよび定電圧充電時間ＴＣＶを算出する（ステップＳ６０３）。具体的には、図４の式（３）および式（４）に示すように基本推定値に係数をかけ合わせることによって補正をおこなう。 Subsequently, the charging time estimation device 10 uses the current value information I and the deterioration state information by the charging time calculation means 114 to calculate the basic estimated value T int_cc of the constant current charging time T CC and the constant voltage charging time T CV . The basic estimated value T int_cv is corrected to calculate the constant current charging time T CC and the constant voltage charging time T CV (step S603). Specifically, correction is performed by multiplying the basic estimated value by a coefficient as shown in equations (3) and (4) in FIG.

つぎに、充電時間推定装置１０は、判定手段１１０によってバッテリ２０６への定電流充電が可能か否かを判断する（ステップＳ６０４）。定電流充電ＣＣが可能な場合は（ステップＳ６０４：Ｙｅｓ）、充電所要時間算出手段１１４によって定電流充電時間ＴＣＣと定電圧充電時間ＴＣＶとの和を充電所要時間ＴＣＨＧとして算出して（ステップＳ６０５）、本フローチャートによる処理を終了する。 Next, the charging time estimation apparatus 10 determines whether or not the constant current charging of the battery 206 is possible by the determination unit 110 (step S604). When the constant current charge CC is possible (step S604: Yes), the charge required time calculation means 114 calculates the sum of the constant current charge time TCC and the constant voltage charge time T CV as the charge required time T CHG ( Step S605), the process according to this flowchart is terminated.

一方、定電流充電ＣＣが不可能な場合（ステップＳ６０４：Ｎｏ）、すなわち定電力充電ＣＰをおこなう場合は、充電所要時間算出手段１１４によって定電力充電時間ＴＣＰを算出する（ステップＳ６０６）。具体的には、図４の式（５）〜式（７）の演算をおこなうことにより、ステップＳ６０３で算出した定電流充電時間ＴＣＣを用いて定電力充電時間ＴＣＰを算出する。そして、定電力充電時間ＴＣＰと定電圧充電時間ＴＣＶとの和を充電所要時間ＴＣＨＧとして算出して（ステップＳ６０７）、本フローチャートによる処理を終了する。ステップＳ６０５またはＳ５０７で算出された充電所要時間ＴＣＨＧは、メータ２０８（図２参照）などに表示される。 On the other hand, when the constant current charge CC is impossible (step S604: No), that is, when the constant power charge CP is performed, the constant power charge time T CP is calculated by the required charge time calculation means 114 (step S606). Specifically, the constant power charging time T CP is calculated using the constant current charging time T CC calculated in step S603 by performing the calculations of the equations (5) to (7) in FIG. Then, the sum of the constant power charging time T CP and the constant voltage charging time T CV is calculated as the required charging time T CHG (step S607), and the processing according to this flowchart ends. The required charging time T CHG calculated in step S605 or S507 is displayed on the meter 208 (see FIG. 2) or the like.

以上説明したように、実施の形態にかかる充電時間推定装置１０は、電池温度情報ｔｃellおよび残存電池容量情報ＳＯＣを用いて算出した定電流充電時間ＴＣＣの基本推定値Ｔｉｎｔ＿ｃｃおよび定電圧充電時間ＴＣＶの基本推定値Ｔｉｎｔ＿ｃｖに対して、電流値情報Iおよび劣化状態情報を用いて補正をおこなうので、バッテリ２０６に実際に供給される電流量およびバッテリ２０６の劣化度合いを考慮して精度よく充電所要時間を推定することができる。 As described above, the charging time estimation apparatus 10 according to the embodiment includes the basic estimated value T int_cc and the constant voltage charging of the constant current charging time T CC calculated using the battery temperature information t cell and the remaining battery capacity information SOC. Since the basic estimated value T int_cv of the time T CV is corrected using the current value information I and the deterioration state information, the accuracy is considered in consideration of the amount of current actually supplied to the battery 206 and the degree of deterioration of the battery 206. The time required for charging can be estimated well.

また、充電時間推定装置１０は、バッテリ２０６への定電流充電が不可能と判断された場合には、補正後の定電流充電時間ＴＣＣを用いて定電力充電時間ＴＣＰを算出し、定電力充電時間ＴＣＰおよび定電圧充電時間ＴＣＶの和を充電所要時間ＴＣＨＧとして算出するので、充電器側の状態（電源からの電力供給状況など）を考慮して、より精度よく充電所要時間を推定することができる。 In addition, when it is determined that the constant current charging of the battery 206 is impossible, the charging time estimation device 10 calculates the constant power charging time T CP using the corrected constant current charging time T CC and determines the constant current charging time T CP. Since the sum of the power charging time T CP and the constant voltage charging time T CV is calculated as the required charging time T CHG , the charging required time is more accurately considered in consideration of the state of the charger (such as the power supply status from the power source). Can be estimated.

また、充電時間推定装置１０は、定電流充電時間ＴＣＣを元にして定電力充電時間ＴＣＰを推定することができ、電流および電圧が刻々と変化する定電力充電の所要時間を簡便に推定することができる。また、充電時間推定装置１０は、定電流充電時間ＴＣＣおよび定電圧充電時間ＴＣＶの基本推定値に対して、バッテリ２０６への充電電流の理想値（基本電流値Ｉｉｎｔ）をバッテリ２０６に実際に供給される充電電流の電流値で除した係数と、バッテリ２０６の現在の最大電池容量を最大電池容量の初期値で除した係数と、をかけ合わせることにより補正をおこなうので、バッテリ２０６の状態を反映して充電所要時間の算出をおこなうことができる。 Further, the charging time estimation device 10 can estimate the constant power charging time T CP based on the constant current charging time T CC , and easily estimate the time required for constant power charging in which the current and voltage change every moment. can do. In addition, the charging time estimation device 10 gives the battery 206 an ideal value (basic current value I int ) of the charging current to the battery 206 with respect to the basic estimated values of the constant current charging time T CC and the constant voltage charging time T CV. Since the correction is performed by multiplying the coefficient obtained by dividing the current value of the actually supplied charging current by the coefficient obtained by dividing the current maximum battery capacity of the battery 206 by the initial value of the maximum battery capacity, The time required for charging can be calculated reflecting the state.

１０……充電時間推定装置、２０……電動車、１０２……電池温度情報取得手段、１０４……電池容量情報取得手段、１０６……電流値情報取得手段、１０８……劣化状態情報取得手段、１１０……判定手段、１１２……基本推定値算出手段、１１４……充電所要時間算出手段、２０２……充電口、２０４……車載充電器、２０６……バッテリ、２０８……メータ、Ｇ……充電ガン、Ｑ……急速充電器。   DESCRIPTION OF SYMBOLS 10 ... Charging time estimation apparatus, 20 ... Electric vehicle, 102 ... Battery temperature information acquisition means, 104 ... Battery capacity information acquisition means, 106 ... Current value information acquisition means, 108 ... Degradation state information acquisition means, 110 …… Determining means, 112 …… Basic estimated value calculating means, 114 …… Charging required time calculating means, 202 …… Charging port, 204 …… In-vehicle charger, 206 …… Battery, 208 …… Meter, G …… Charging gun, Q ... Quick charger.

Claims (5)

充電器から定電流充電および定電圧充電を受けて充電される二次電池の充電所要時間を推定する充電時間推定装置であって、
前記二次電池の残存電池容量情報を取得する電池容量情報取得手段と、
前記二次電池に供給される充電電流の電流値情報を取得する電流値情報取得手段と、
前記残存電池容量情報を用いて、前記二次電池の定電流充電時間の基本推定値および定電圧充電時間の基本推定値を算出する基本推定値算出手段と、
前記電流値情報を用いて、前記定電流充電時間の基本推定値および前記定電圧充電時間の基本推定値に対して補正をおこない、前記補正後の前記定電流充電時間の基本推定値および前記補正後の前記定電圧充電時間の基本推定値の和を前記充電所要時間として算出する充電所要時間算出手段と、を備え、
前記充電器が前記定電流充電に代えて定電力充電をおこなう場合、
前記充電所要時間算出手段は、前記補正後の前記定電流充電時間の基本推定値を用いて定電力充電時間を算出し、前記定電力充電時間および前記補正後の前記定電圧充電時間の基本推定値の和を前記充電所要時間として算出する、
ことを特徴とする充電時間推定装置。 A charging time estimation device that estimates a charging time of a secondary battery that is charged by receiving constant current charging and constant voltage charging from a charger,
Battery capacity information acquisition means for acquiring remaining battery capacity information of the secondary battery;
Current value information acquisition means for acquiring current value information of a charging current supplied to the secondary battery;
Basic estimated value calculation means for calculating a basic estimated value of a constant current charging time and a basic estimated value of a constant voltage charging time of the secondary battery using the remaining battery capacity information;
Using the current value information, the basic estimated value of the constant current charging time and the basic estimated value of the constant voltage charging time are corrected, and the corrected basic estimated value of the constant current charging time and the correction A required charging time calculating means for calculating a sum of basic estimated values of the later constant voltage charging time as the required charging time , and
When the charger performs constant power charging instead of the constant current charging,
The required charging time calculating means calculates a constant power charging time using a basic estimated value of the constant current charging time after the correction, and a basic estimation of the constant power charging time and the constant voltage charging time after the correction. Calculate the sum of the values as the required charging time,
The charging time estimation apparatus characterized by the above-mentioned. 前記二次電池の電圧値情報を取得する電圧値情報取得手段をさらに備え、
前記充電所要時間算出手段は、充電開始時に前記電圧値情報取得手段によって取得した開始電圧値および前記定電力充電から前記定電圧充電への移行電圧値を用いて前記定電力充電時間を算出することを特徴とする請求項１に記載の充電時間推定装置。 Voltage value information acquisition means for acquiring voltage value information of the secondary battery,
The required charging time calculating means calculates the constant power charging time using a start voltage value acquired by the voltage value information acquiring means at the start of charging and a voltage value transferred from the constant power charging to the constant voltage charging. The charging time estimation device according to claim 1 . 前記二次電池の最大電池容量の劣化状態情報を取得する劣化状態情報取得手段を備え、
前記充電所要時間算出手段は、前記電流値情報および前記劣化状態情報を用いて、前記定電流充電時間の基本推定値および前記定電圧充電時間の基本推定値に対して補正をおこない、前記補正後の前記定電流充電時間の基本推定値および前記補正後の前記定電圧充電時間の基本推定値の和を前記充電所要時間として算出することを特徴とする請求項１または２に記載の充電時間推定装置。 A deterioration state information acquisition means for acquiring deterioration state information of the maximum battery capacity of the secondary battery;
The required charging time calculating means corrects the basic estimated value of the constant current charging time and the basic estimated value of the constant voltage charging time using the current value information and the deterioration state information, and after the correction 3. The charging time estimation according to claim 1, wherein a sum of the basic estimated value of the constant current charging time and the corrected basic estimated value of the constant voltage charging time is calculated as the required charging time. apparatus. 前記充電所要時間算出手段は、前記定電流充電時間の基本推定値および前記定電圧充電時間の基本推定値に対して、前記充電器から前記二次電池に供給される充電電流の基準値を前記二次電池に実際に供給される充電電流の実電流値で除した係数と、前記二次電池の最大電池容量の現在値を前記二次電池の最大電池容量の初期値で除した係数と、をかけ合わせることにより、前記補正をおこなうことを特徴とする請求項１から３のいずれか一つに記載の充電時間推定装置。 The required charging time calculating means calculates a reference value of a charging current supplied from the charger to the secondary battery with respect to a basic estimated value of the constant current charging time and a basic estimated value of the constant voltage charging time. A coefficient divided by the actual current value of the charging current actually supplied to the secondary battery, a coefficient obtained by dividing the current value of the maximum battery capacity of the secondary battery by the initial value of the maximum battery capacity of the secondary battery, by multiplying the charging time estimation apparatus according to any one of claims 1 to 3, characterized in that the correction. 充電器から定電流充電および定電圧充電を受けて充電される二次電池の充電所要時間を推定する充電時間推定方法であって、
前記二次電池の残存電池容量情報を用いて、前記二次電池への定電流充電時間の基本推定値および定電圧充電時間の基本推定値を算出する充電時間算出工程と、
前記二次電池に供給される充電電流の電流値情報を用いて、前記定電流充電時間の基本推定値および前記定電圧充電時間の基本推定値に対して補正をおこない、前記補正後の前記定電流充電時間の基本推定値および前記補正後の前記定電圧充電時間の基本推定値の和を前記充電所要時間として算出する充電所要時間算出工程と、を含み、
前記充電所要時間算出工程では、前記充電器が前記定電流充電に代えて定電力充電をおこなう場合、前記補正後の前記定電流充電時間の基本推定値を用いて定電力充電時間を算出し、前記定電力充電時間および前記補正後の前記定電圧充電時間の基本推定値の和を前記充電所要時間として算出する、
ことを特徴とする充電時間推定方法。 A charging time estimation method for estimating a charging time of a secondary battery that is charged by receiving constant current charging and constant voltage charging from a charger,
Using the remaining battery capacity information of the secondary battery, a charging time calculation step of calculating a basic estimated value of constant current charging time and a basic estimated value of constant voltage charging time to the secondary battery;
Using the current value information of the charging current supplied to the secondary battery, the basic estimated value of the constant current charging time and the basic estimated value of the constant voltage charging time are corrected, and the fixed constant after the correction is performed. A required charging time calculating step of calculating a sum of a basic estimated value of a current charging time and a basic estimated value of the constant voltage charging time after the correction as the required charging time ,
In the required charging time calculating step, when the charger performs constant power charging instead of the constant current charging, the constant power charging time is calculated using the basic estimated value of the corrected constant current charging time, Calculating the sum of the basic estimated value of the constant power charging time and the constant voltage charging time after the correction as the required charging time;
The charging time estimation method characterized by the above-mentioned.
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