JP6459913B2 - Power system controller - Google Patents
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- JP6459913B2 JP6459913B2 JP2015221622A JP2015221622A JP6459913B2 JP 6459913 B2 JP6459913 B2 JP 6459913B2 JP 2015221622 A JP2015221622 A JP 2015221622A JP 2015221622 A JP2015221622 A JP 2015221622A JP 6459913 B2 JP6459913 B2 JP 6459913B2
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical group [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims description 105
- 229910001416 lithium ion Inorganic materials 0.000 claims description 105
- 238000001514 detection method Methods 0.000 claims description 22
- 238000007599 discharging Methods 0.000 claims description 21
- 230000010287 polarization Effects 0.000 claims description 19
- 238000004364 calculation method Methods 0.000 claims description 15
- 238000000034 method Methods 0.000 description 31
- 230000010354 integration Effects 0.000 description 11
- 238000010248 power generation Methods 0.000 description 5
- 230000001172 regenerating effect Effects 0.000 description 5
- 239000007858 starting material Substances 0.000 description 5
- 230000006870 function Effects 0.000 description 4
- 229910052744 lithium Inorganic materials 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- YADSGOSSYOOKMP-UHFFFAOYSA-N dioxolead Chemical compound O=[Pb]=O YADSGOSSYOOKMP-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000007773 negative electrode material Substances 0.000 description 3
- 239000007774 positive electrode material Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 229910000652 nickel hydride Inorganic materials 0.000 description 2
- 230000003071 parasitic effect Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 229910032387 LiCoO2 Inorganic materials 0.000 description 1
- 229910052493 LiFePO4 Inorganic materials 0.000 description 1
- 229910003005 LiNiO2 Inorganic materials 0.000 description 1
- 229910002097 Lithium manganese(III,IV) oxide Inorganic materials 0.000 description 1
- 229910014715 LixTiO2 Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000016507 interphase Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000002905 metal composite material Substances 0.000 description 1
- 239000005486 organic electrolyte Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000007784 solid electrolyte Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 235000011149 sulphuric acid Nutrition 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Secondary Cells (AREA)
- Battery Mounting, Suspending (AREA)
- Tests Of Electric Status Of Batteries (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Description
本発明は、蓄電池の満充電容量を算出し、学習する電源システムの制御装置に関する。 The present invention relates to a control device for a power supply system that calculates and learns the full charge capacity of a storage battery.
蓄電池の満充電容量は、負極表面上に成長するＳＥＩ（Solid Electrolyte Interphase）被膜に起因する劣化や、正極活性物質及び負極活性物質の膨脹収縮に伴う構造破壊に起因する劣化によって、容量低下することが知られている。満充電容量が変化することで、充電率（SOC: State of Charge）の算出値と実際値との間に誤差が生じることが懸念される。そこで、充電中のＳＯＣ変動量と電流積算値とを用いて、蓄電池の満充電容量を算出する方法が知られている（例えば、特許文献１）。 The full charge capacity of a storage battery is reduced due to deterioration caused by SEI (Solid Electrolyte Interphase) coating growing on the negative electrode surface, or deterioration caused by structural destruction accompanying expansion and contraction of the positive electrode active material and the negative electrode active material. It has been known. There is a concern that an error may occur between the calculated value of the state of charge (SOC) and the actual value due to the change in the full charge capacity. Therefore, a method of calculating the full charge capacity of the storage battery using the SOC fluctuation amount during charging and the current integrated value is known (for example, Patent Document 1).
上記特許文献１に記載の構成は、車両に搭載された蓄電池に対し、車両の外部の電源から車載蓄電池に対して充電を実施する場合に、ＳＯＣ変動量と電流積算値とを用いて、車載蓄電池の満充電容量を算出するものである。つまり、外部電源から充電を実施する場合にのみ適用可能なものであり、車両の電気的構成が限定され、また、満充電容量の算出機会が限られたものとなる。 The configuration described in Patent Document 1 uses the SOC fluctuation amount and the current integrated value when the storage battery mounted on the vehicle is charged from the power supply external to the vehicle to the in-vehicle storage battery. The full charge capacity of the storage battery is calculated. In other words, it is applicable only when charging from an external power source, and the electrical configuration of the vehicle is limited, and the opportunity for calculating the full charge capacity is limited.
本発明は、上記課題に鑑みて為されたものであり、外部電源から車両に対する充放電を行うことなく、満充電容量の学習を精度よく行うことが可能な電源システムの制御装置を提供することを主たる目的とする。 The present invention has been made in view of the above problems, and provides a control device for a power supply system capable of accurately learning a full charge capacity without charging / discharging a vehicle from an external power supply. Is the main purpose.
本構成は、第１蓄電池（１０）と、第２蓄電池（４１）と、前記第１蓄電池と前記第２蓄電池との間に設けられたスイッチ（１５，１６）と、を備え、車両に搭載される車載電源システムの制御を行う電源システムの制御装置（２０）であって、前記第１蓄電池に流れる充放電電流の検出値を電流検出部（２５）から取得する取得部と、前記車両が駐車状態において、前記スイッチをオフ状態からオン状態に操作することで、前記第１蓄電池と前記第２蓄電池との間で前記充放電電流を流すスイッチ操作部と、前記スイッチ操作部により前記スイッチがオン状態とされている期間において、前記第１蓄電池の充電率の変化量と、前記充放電電流の検出値の積算値と、に基づいて、前記第１蓄電池の満充電容量を算出し、その算出された満充電容量を学習する学習部と、を備えていることを特徴とする。 This configuration includes a first storage battery (10), a second storage battery (41), and switches (15, 16) provided between the first storage battery and the second storage battery, and is mounted on a vehicle. A power supply system control device (20) for controlling a vehicle-mounted power supply system, wherein an acquisition unit for acquiring a detection value of a charge / discharge current flowing in the first storage battery from a current detection unit (25); In a parking state, by operating the switch from an off state to an on state, a switch operation unit that allows the charge / discharge current to flow between the first storage battery and the second storage battery, and the switch operation unit causes the switch to In a period in which the first storage battery is turned on, the full charge capacity of the first storage battery is calculated based on the amount of change in the charging rate of the first storage battery and the integrated value of the detected value of the charge / discharge current, Calculated full charge Characterized in that it comprises a learning unit for learning the amount of a.
駐車状態において、第１蓄電池と第２蓄電池との間で充放電電流を流す構成とした。この構成により、第１蓄電池と第２蓄電池とはともに車両に搭載されているため、外部電源から車両に対する充放電を行うことなく、満充電容量の学習を行うことが可能となる。さらに、駐車状態において、車両に搭載されている各種電気負荷、例えば、スタータやパワーステアリングなどの駆動負荷の駆動が停止されている。このため、充放電電流の電流値は安定したものとなる。また、各種電気負荷の駆動が停止されているため、各種電気負荷の駆動に伴う放射ノイズを抑制できるため、充放電電流の検出値の取得に与える悪影響を抑制できる。 In the parking state, a charging / discharging current is allowed to flow between the first storage battery and the second storage battery. With this configuration, since the first storage battery and the second storage battery are both mounted on the vehicle, it is possible to learn the full charge capacity without charging / discharging the vehicle from an external power source. Further, in the parking state, driving of various electric loads mounted on the vehicle, for example, driving loads such as a starter and a power steering is stopped. For this reason, the current value of the charge / discharge current is stable. In addition, since driving of various electric loads is stopped, radiation noise associated with driving of the various electric loads can be suppressed, so that adverse effects on acquisition of the detected value of charge / discharge current can be suppressed.
（第１実施形態）
以下、本発明を具体化した実施形態を図面に基づいて説明する。本実施形態の車載電源システムが搭載される車両は、エンジン（内燃機関）を駆動源として走行するものであり、いわゆるアイドリングストップ機能を有している。
(First embodiment)
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below with reference to the drawings. A vehicle on which the in-vehicle power supply system of this embodiment is mounted travels using an engine (internal combustion engine) as a drive source, and has a so-called idling stop function.
図１に示すように、本電源システムは、リチウムイオン蓄電池１０（第１蓄電池）、ＭＯＳスイッチ１５、ＳＭＲスイッチ１６、回転電機４０、鉛蓄電池４１（第２蓄電池）、スタータ４４、各種の電気負荷４５を備えている。このうち、リチウムイオン蓄電池１０と各スイッチ１５，１６とは、図示しない筐体（収容ケース）に収容されることで一体化され、電池ユニットＵとして構成されている。また、電池ユニットＵは、車載電源システムの制御を行う制御装置２０を有しており、各スイッチ１５，１６と制御装置２０とは同一の基板に実装された状態で筐体内に収容されている。 As shown in FIG. 1, the power supply system includes a lithium ion storage battery 10 (first storage battery), a MOS switch 15, an SMR switch 16, a rotating electrical machine 40, a lead storage battery 41 (second storage battery), a starter 44, and various electric loads. 45. Among these, the lithium ion storage battery 10 and each switch 15 and 16 are integrated by being accommodated in the housing | casing (accommodating case) which is not shown in figure, and is comprised as the battery unit U. FIG. Further, the battery unit U has a control device 20 that controls the in-vehicle power supply system, and the switches 15 and 16 and the control device 20 are accommodated in the casing in a state of being mounted on the same substrate. .
電池ユニットＵには外部端子として第１端子Ｔ１、第２端子Ｔ２が設けられており、第１端子Ｔ１には鉛蓄電池４１とスタータ４４と電気負荷４５とが接続され、第２端子Ｔ２には回転電機４０が接続されている。なお、端子Ｔ１，Ｔ２はいずれも回転電機４０の入出力の電流が流れる大電流入出力端子となっている。 The battery unit U is provided with a first terminal T1 and a second terminal T2 as external terminals. A lead storage battery 41, a starter 44, and an electric load 45 are connected to the first terminal T1, and a second terminal T2 is connected to the second terminal T2. A rotating electrical machine 40 is connected. The terminals T1 and T2 are both large current input / output terminals through which input / output currents of the rotating electrical machine 40 flow.
回転電機４０の回転軸は、図示しないエンジン出力軸に対してベルト等により駆動連結されており、エンジン出力軸の回転によって回転電機４０の回転軸が回転する一方、回転電機４０の回転軸の回転によってエンジン出力軸が回転する。この場合、回転電機４０は、エンジン出力軸や車軸の回転により発電（回生発電）を行う発電機能と、エンジン出力軸に回転力を付与する動力出力機能とを備え、ＩＳＧ（Integrated Starter Generator）を構成するものとなっている。 The rotating shaft of the rotating electrical machine 40 is connected to an engine output shaft (not shown) by a belt or the like, and the rotating shaft of the rotating electrical machine 40 is rotated by the rotation of the engine output shaft, while the rotating shaft of the rotating electrical machine 40 is rotated. As a result, the engine output shaft rotates. In this case, the rotating electrical machine 40 includes a power generation function for generating power (regenerative power generation) by rotation of the engine output shaft and the axle, and a power output function for applying rotational force to the engine output shaft, and an ISG (Integrated Starter Generator). It is what constitutes.
鉛蓄電池４１とリチウムイオン蓄電池１０とは回転電機４０に対して並列に電気接続されており、回転電機４０の発電電力により各蓄電池１０，４１の充電が可能となっている。また、回転電機４０は、各蓄電池１０，４１からの給電により駆動されるものとなっている。 The lead storage battery 41 and the lithium ion storage battery 10 are electrically connected in parallel to the rotating electrical machine 40, and the storage batteries 10 and 41 can be charged by the generated power of the rotating electrical machine 40. The rotating electrical machine 40 is driven by power feeding from the storage batteries 10 and 41.
鉛蓄電池４１は周知の汎用蓄電池である。これに対し、リチウムイオン蓄電池１０は、鉛蓄電池４１に比べて、充放電における電力損失が少なく、出力密度、及びエネルギ密度の高い高密度蓄電池である。 The lead storage battery 41 is a known general-purpose storage battery. On the other hand, the lithium ion storage battery 10 is a high-density storage battery with less power loss in charge / discharge and higher output density and energy density than the lead storage battery 41.
鉛蓄電池４１の構成として具体的には、正極活物質が二酸化鉛（ＰｂＯ２）、負極活物質が鉛（Ｐｂ）、電解液が硫酸（Ｈ２ＳＯ４）である。そして、これらの電極から構成された複数の電池セルを直列接続して構成されている。なお本実施形態では、鉛蓄電池４１の充電容量がリチウムイオン蓄電池１０の充電容量よりも大きくなるような設定がなされている。 Specifically, the lead storage battery 41 is configured such that the positive electrode active material is lead dioxide (PbO2), the negative electrode active material is lead (Pb), and the electrolytic solution is sulfuric acid (H2SO4). And the some battery cell comprised from these electrodes is connected in series, and is comprised. In the present embodiment, setting is made such that the charge capacity of the lead storage battery 41 is larger than the charge capacity of the lithium ion storage battery 10.
一方、リチウムイオン蓄電池１０の正極活物質には、リチウムを含む酸化物（リチウム金属複合酸化物）が用いられており、具体例としては、ＬｉＣｏＯ２、ＬｉＭｎ２Ｏ４、ＬｉＮｉＯ２、ＬｉＦｅＰＯ４等が挙げられる。リチウムイオン蓄電池１０の負極活物質には、カーボン（Ｃ）やグラファイト、チタン酸リチウム（例えばＬｉｘＴｉＯ２）、Ｓｉ又はＳｎを含有する合金等が用いられている。リチウムイオン蓄電池１０の電解液には有機電解液が用いられている。そして、これらの電極から構成された複数の電池セルを直列接続して構成されている。 On the other hand, an oxide containing lithium (lithium metal composite oxide) is used for the positive electrode active material of the lithium ion storage battery 10, and specific examples include LiCoO2, LiMn2O4, LiNiO2, LiFePO4, and the like. As the negative electrode active material of the lithium ion storage battery 10, carbon (C), graphite, lithium titanate (for example, LixTiO2), an alloy containing Si or Sn, or the like is used. An organic electrolyte is used as the electrolyte of the lithium ion storage battery 10. And the some battery cell comprised from these electrodes is connected in series, and is comprised.
なお、図１中の符号１２，４３は、リチウムイオン蓄電池１０及び鉛蓄電池４１の電池セル集合体を表し、符号１１，４２はリチウムイオン蓄電池１０及び鉛蓄電池４１の内部抵抗を表している。 In addition, the codes | symbols 12 and 43 in FIG. 1 represent the battery cell assembly of the lithium ion storage battery 10 and the lead storage battery 41, and the codes | symbols 11 and 42 represent the internal resistance of the lithium ion storage battery 10 and the lead storage battery 41.
電気負荷４５には、供給電力の電圧が概ね一定、又は少なくとも所定範囲内で変動するよう安定であることが要求される定電圧要求負荷が含まれる。定電圧要求負荷の具体例としてはナビゲーション装置やオーディオ装置が挙げられる。この場合、電圧変動が抑えられていることで、上記各装置の安定動作が実現可能となっている。仮に、定電圧要求負荷に入力されている電圧が変動した場合、定電圧要求負荷の動作が停止した後、再起動することになる。なお、電気負荷４５は、後述するＥＣＵ３０を含むものである。 The electric load 45 includes a constant voltage required load that is required to be stable so that the voltage of the supplied power is substantially constant or varies at least within a predetermined range. Specific examples of the constant voltage request load include a navigation device and an audio device. In this case, stable operation of each of the above devices can be realized by suppressing voltage fluctuation. If the voltage input to the constant voltage request load fluctuates, the operation of the constant voltage request load stops and then restarts. The electrical load 45 includes an ECU 30 described later.
その他、電気負荷４５には、ヘッドライト、フロントウインドシールド等のワイパ、空調装置の送風ファン、リヤウインドシールドのデフロスタ用ヒータ等が挙げられる。これらヘッドライト、ワイパ及び送風ファン等については、供給電力の電圧が変化するとヘッドライトの明滅、ワイパの作動速度変化、送風ファンの回転速度変化（送風音変化）が生じてしまうので、供給電力の電圧を一定にすることが要求される。 In addition, examples of the electric load 45 include wipers such as a headlight and a front windshield, a blower fan for an air conditioner, and a heater for a defroster for a rear windshield. For these headlights, wipers, blower fans, etc., if the power supply voltage changes, the headlight blinks, the wiper operating speed changes, and the blower fan rotation speed changes (fan noise change). A constant voltage is required.
電池ユニットＵには、ユニット内電気経路として、各端子Ｔ１，Ｔ２及びリチウムイオン蓄電池１０を相互に接続する接続経路２１，２２が設けられている。そして、このうち第１端子Ｔ１と第２端子Ｔ２とを接続する第１接続経路２１にＭＯＳスイッチ１５が設けられ、第１接続経路２１上の接続点Ｎ１（電池接続点）とリチウムイオン蓄電池１０とを接続する第２接続経路２２にＳＭＲスイッチ１６が設けられている。これら各スイッチ１５，１６は、いずれも２×ｎ個のＭＯＳＦＥＴ（半導体スイッチ）を備え、その２つ一組のＭＯＳＦＥＴの寄生ダイオードが互いに逆向きになるように直列に接続されている。この寄生ダイオードによって、各スイッチ１５，１６をオフ状態とした場合にそのスイッチが設けられた経路に流れる電流が完全に遮断される。 The battery unit U is provided with connection paths 21 and 22 for connecting the terminals T1 and T2 and the lithium ion storage battery 10 to each other as an in-unit electrical path. Of these, the MOS switch 15 is provided in the first connection path 21 connecting the first terminal T1 and the second terminal T2, and the connection point N1 (battery connection point) on the first connection path 21 and the lithium ion storage battery 10 are connected. The SMR switch 16 is provided in the second connection path 22 that connects the two. Each of these switches 15 and 16 includes 2 × n MOSFETs (semiconductor switches) and is connected in series so that the parasitic diodes of the pair of MOSFETs are opposite to each other. When the switches 15 and 16 are turned off, the parasitic diode completely cuts off the current flowing through the path where the switches are provided.
また、本電源システムでは、ＭＯＳスイッチ１５を介さずに鉛蓄電池４１と回転電機４０とを接続可能にするバイパス経路２３が設けられている。具体的には、バイパス経路２３は、電池ユニットＵを迂回して、第１端子Ｔ１に接続される電気経路（鉛蓄電池４１等に接続される経路）と第２端子Ｔ２に接続される電気経路（回転電機４０に接続される経路）とを電気接続するように設けられている。そのバイパス経路２３上には、鉛蓄電池４１側と回転電機４０側との間の接続を遮断状態又は導通状態にするバイパススイッチ２４が設けられている。バイパススイッチ２４は常閉式のリレースイッチである。なお、バイパス経路２３及びバイパススイッチ２４を、電池ユニットＵ内においてＭＯＳスイッチ１５を迂回するように設けることも可能である。 Further, in the present power supply system, a bypass path 23 is provided that enables the lead storage battery 41 and the rotating electrical machine 40 to be connected without using the MOS switch 15. Specifically, the bypass path 23 bypasses the battery unit U and is connected to the first terminal T1 (path connected to the lead storage battery 41 and the like) and the electrical path connected to the second terminal T2. It is provided so as to be electrically connected to the (path connected to the rotating electrical machine 40). On the bypass path 23, a bypass switch 24 is provided that switches the connection between the lead storage battery 41 side and the rotating electrical machine 40 side to a cut-off state or a conductive state. The bypass switch 24 is a normally closed relay switch. Note that the bypass path 23 and the bypass switch 24 may be provided so as to bypass the MOS switch 15 in the battery unit U.
制御装置２０は、各スイッチ１５，１６のオン（閉鎖）とオフ（開放）との切り替えを実施する。この場合、制御装置２０は、電気負荷４５に対して電力供給を行う放電時（負荷駆動時）であるか、回転電機４０からの電力供給により充電される充電時であるか、アイドリングストップ制御でのエンジン停止状態で回転電機４０によりエンジンを自動再始動させる再始動時であるかに応じて、ＭＯＳスイッチ１５のオンオフを制御する。なお、ＳＭＲスイッチ１６は、車両走行時は基本的にオン（閉鎖）状態で維持され、電池ユニットＵや回転電機４０等で何らかの異常が発生した場合にオフ（開放）されるようになっている。 The control device 20 switches the switches 15 and 16 between on (closed) and off (open). In this case, the control device 20 is at the time of discharging (load driving) for supplying power to the electric load 45, charging at the time of charging by supplying power from the rotating electrical machine 40, or by idling stop control. The on / off state of the MOS switch 15 is controlled depending on whether the engine is automatically restarted by the rotating electrical machine 40 when the engine is stopped. The SMR switch 16 is basically maintained in an on (closed) state when the vehicle is running, and is turned off (opened) when any abnormality occurs in the battery unit U, the rotating electrical machine 40, or the like. .
また、制御装置２０には、電池ユニット外のＥＣＵ３０が接続されている。つまり、これら制御装置２０及びＥＣＵ３０は、ＣＡＮ等の通信ネットワークにより接続されて相互に通信可能となっており、制御装置２０及びＥＣＵ３０に記憶される各種データが互いに共有できるものとなっている。ＥＣＵ３０は、アイドリングストップ制御を実施する機能を有する電子制御装置である。アイドリングストップ制御とは、周知のとおり所定の自動停止条件の成立によりエンジンを自動停止させ、かつその自動停止状態下で所定の再始動条件の成立によりエンジンを再始動させるものである。 The control device 20 is connected to an ECU 30 outside the battery unit. That is, the control device 20 and the ECU 30 are connected via a communication network such as CAN and can communicate with each other, and various data stored in the control device 20 and the ECU 30 can be shared with each other. The ECU 30 is an electronic control device having a function of performing idling stop control. As is well known, the idling stop control is to automatically stop the engine when a predetermined automatic stop condition is satisfied, and to restart the engine when the predetermined restart condition is satisfied under the automatic stop state.
回転電機４０は、エンジン出力軸の回転エネルギにより発電するものである。具体的には、回転電機４０においてロータがエンジン出力軸により回転すると、ロータコイルに流れる励磁電流に応じてステータコイルに交流電流が誘起され、図示しない整流器により直流電流に変換される。そして、回転電機４０においてロータコイルに流れる励磁電流がレギュレータにより調整されることで、発電された直流電流の電圧が所定の調整電圧Ｖｒｅｇとなるよう調整される。 The rotating electrical machine 40 generates power using the rotational energy of the engine output shaft. Specifically, when the rotor is rotated by the engine output shaft in the rotating electrical machine 40, an alternating current is induced in the stator coil according to the exciting current flowing in the rotor coil, and is converted into a direct current by a rectifier (not shown). Then, the excitation current flowing through the rotor coil in the rotating electrical machine 40 is adjusted by the regulator, so that the voltage of the generated direct current is adjusted to be a predetermined adjustment voltage Vreg.
回転電機４０で発電した電力は、電気負荷４５に供給されるとともに、リチウムイオン蓄電池１０及び鉛蓄電池４１に供給される。エンジンの駆動が停止して回転電機４０で発電されていない時には、リチウムイオン蓄電池１０及び鉛蓄電池４１から電気負荷４５に電力供給される。リチウムイオン蓄電池１０及び鉛蓄電池４１から電気負荷４５への放電量、及び回転電機４０からの充電量は、ＳＯＣ（満充電容量に対する実際の充電量の割合、充電率）が過充放電とならない範囲（ＳＯＣ使用領域）となるよう適宜調整される。 The electric power generated by the rotating electrical machine 40 is supplied to the electric load 45 and also supplied to the lithium ion storage battery 10 and the lead storage battery 41. When the driving of the engine is stopped and no electric power is generated by the rotating electrical machine 40, electric power is supplied from the lithium ion storage battery 10 and the lead storage battery 41 to the electric load 45. The discharge amount from the lithium ion storage battery 10 and the lead storage battery 41 to the electric load 45 and the charge amount from the rotating electrical machine 40 are ranges in which SOC (the ratio of the actual charge amount to the full charge capacity, the charge rate) does not cause overcharge / discharge. It adjusts suitably so that it may become (SOC use field).
この場合、制御装置２０は、リチウムイオン蓄電池１０のＳＯＣを所定の使用領域（後述する図３）にすべく、リチウムイオン蓄電池１０への充電量を制限して過充電保護するとともに、リチウムイオン蓄電池１０からの放電量を制限して過放電保護するよう保護制御を実施する。具体的には、制御装置２０は、電流センサ２５（電流検出部）からリチウムイオン蓄電池１０の充放電電流Ｉの検出値を常時取得するとともに、電圧センサ２６（電圧検出部）からリチウムイオン蓄電池１０の端子間電圧Ｖの検出値を常時取得する。そして、制御装置２０は、その端子間電圧Ｖ及び充放電電流Ｉの検出値に基づいて、保護制御を実施する。 In this case, the control device 20 limits overcharge protection to the lithium ion storage battery 10 by limiting the amount of charge to the lithium ion storage battery 10 so that the SOC of the lithium ion storage battery 10 is in a predetermined use region (FIG. 3 described later). Protection control is performed so that the discharge amount from 10 is limited and overdischarge protection is performed. Specifically, the control device 20 constantly acquires the detected value of the charge / discharge current I of the lithium ion storage battery 10 from the current sensor 25 (current detection unit), and also acquires the detection value of the lithium ion storage battery 10 from the voltage sensor 26 (voltage detection unit). The detection value of the inter-terminal voltage V is always obtained. And the control apparatus 20 implements protection control based on the detected value of the voltage V between the terminals and the charging / discharging current I.
制御装置２０は、リチウムイオン蓄電池１０の端子間電圧Ｖが下限電圧よりも低下した場合に、回転電機４０からの充電により、リチウムイオン蓄電池１０の過放電保護を図るようにする。前記下限電圧は、ＳＯＣ使用領域の下限値に対応する電圧に基づき設定されるとよい。また、制御装置２０は、調整電圧Ｖｒｅｇの可変設定を指示することにより、リチウムイオン蓄電池１０の端子間電圧Ｖが上限電圧よりも上昇しないようにして過充電保護を実施する。前記上限電圧は、ＳＯＣ使用領域の上限値に対応する電圧に基づき設定されるとよい。 When the voltage V between terminals of the lithium ion storage battery 10 is lower than the lower limit voltage, the control device 20 performs overdischarge protection of the lithium ion storage battery 10 by charging from the rotating electrical machine 40. The lower limit voltage may be set based on a voltage corresponding to the lower limit value of the SOC use region. Moreover, the control apparatus 20 implements overcharge protection by instructing variable setting of the adjustment voltage Vreg so that the inter-terminal voltage V of the lithium ion storage battery 10 does not rise above the upper limit voltage. The upper limit voltage may be set based on a voltage corresponding to the upper limit value of the SOC usage region.
なお、鉛蓄電池４１については、図示しない別の電池制御装置により同様の保護制御が実施される。制御装置２０は、鉛蓄電池４１を制御する電池制御装置から鉛蓄電池４１の端子間電圧Ｖｐの検出値を取得する。なお、制御装置２０は、鉛蓄電池４１の端子間電圧Ｖｐを検出する電圧センサから検出値を取得する構成であってもよい。 In addition, about the lead storage battery 41, the same protection control is implemented by another battery control apparatus which is not shown in figure. The control device 20 acquires the detected value of the inter-terminal voltage Vp of the lead storage battery 41 from the battery control device that controls the lead storage battery 41. The control device 20 may be configured to acquire a detection value from a voltage sensor that detects the inter-terminal voltage Vp of the lead storage battery 41.
また、本実施形態では、車両の回生エネルギにより回転電機４０を発電させて、両蓄電池１０，４１（主にはリチウムイオン蓄電池１０）に充電させる、減速回生を行っている。この減速回生は、車両が減速状態であること、エンジンへの燃料噴射をカットしていること、等の条件が成立した時に実施される。 Further, in the present embodiment, the decelerating regeneration is performed in which the rotating electrical machine 40 is generated by the regenerative energy of the vehicle and is charged in both the storage batteries 10 and 41 (mainly the lithium ion storage battery 10). This deceleration regeneration is performed when conditions such as that the vehicle is decelerating and that fuel injection to the engine is cut are satisfied.
本実施形態では、両蓄電池１０，４１のうちリチウムイオン蓄電池１０を優先的に用いて充放電を行うようにしている。具体的には、回転電機４０の回生発電時において、制御装置２０がＭＯＳスイッチ１５をオフ状態にするとともに、ＳＭＲスイッチ１６をオン状態とすることで、回転電機４０における発電電力が優先的にリチウムイオン蓄電池１０に充電される。また、回転電機４０の駆動時において、制御装置２０がＭＯＳスイッチ１５をオフ状態にするとともに、ＳＭＲスイッチ１６をオン状態とすることで、回転電機４０の消費電力が優先的にリチウムイオン蓄電池１０から放電される。 In this embodiment, charging / discharging is performed by using the lithium ion storage battery 10 preferentially among the storage batteries 10 and 41. Specifically, at the time of regenerative power generation of the rotating electrical machine 40, the control device 20 turns off the MOS switch 15 and turns on the SMR switch 16, so that the generated power in the rotating electrical machine 40 is preferentially lithium. The ion storage battery 10 is charged. Further, when the rotating electrical machine 40 is driven, the control device 20 turns off the MOS switch 15 and turns on the SMR switch 16, so that the power consumption of the rotating electrical machine 40 is preferentially reduced from the lithium ion storage battery 10. Discharged.
上述したように、制御装置２０は、リチウムイオン蓄電池１０のＳＯＣが使用領域内となるように充放電制御を行う。ＳＯＣを算出する方法は、主として、開放端電圧（OCV: Open Circuit Voltage）に基づく推定法と、電流積算による算出法と、がある。 As described above, the control device 20 performs charge / discharge control so that the SOC of the lithium ion storage battery 10 is within the use region. The method for calculating the SOC mainly includes an estimation method based on an open circuit voltage (OCV) and a calculation method based on current integration.
開放端電圧と、ＳＯＣとは、図２に示すように所定の関係を有する。そこで、開放端電圧に基づく推定法では、蓄電池の開放端電圧を取得し、その取得値、及び、開放端電圧とＳＯＣとの対応関係を表すマップを用いて、ＳＯＣを推定する。また、電流積算による算出法では、蓄電池に流れる充放電電流Ｉを取得し、その取得値を時間積分することで電流積算値ΔＡｈを算出する（ΔＡｈ＝∫Ｉ・ｄｔ）。その電流積算値ΔＡｈを満充電容量Ａｈｆで除算することで、ＳＯＣの変化量ΔＳＯＣを算出する。 The open circuit voltage and the SOC have a predetermined relationship as shown in FIG. Therefore, in the estimation method based on the open-circuit voltage, the open-circuit voltage of the storage battery is acquired, and the SOC is estimated using the acquired value and a map representing the correspondence relationship between the open-circuit voltage and the SOC. In the calculation method based on current integration, the charge / discharge current I flowing through the storage battery is acquired, and the acquired value is integrated over time to calculate the current integration value ΔAh (ΔAh = ∫I · dt). The change amount SOC of the SOC is calculated by dividing the current integrated value ΔAh by the full charge capacity Ahf.
開放端電圧に基づく推定法では、開放端電圧、即ち、蓄電池に電流が流れていない状態での端子間電圧Ｖを検出する。または、閉回路電圧、即ち、蓄電池に電流が流れている状態での端子間電圧Ｖから、開放端電圧を推定する。そして、検出又は推定により取得した開放端電圧に基づき算出したＳＯＣに対し、電流積算による算出法によって算出されるＳＯＣの変化量ΔＳＯＣを加算する方法が一般的である。 In the estimation method based on the open-circuit voltage, the open-circuit voltage, that is, the inter-terminal voltage V in a state where no current flows through the storage battery is detected. Alternatively, the open circuit voltage is estimated from the closed circuit voltage, that is, the inter-terminal voltage V in a state where a current flows through the storage battery. A method of adding an SOC change amount ΔSOC calculated by a current integration calculation method to an SOC calculated based on the open-circuit voltage acquired by detection or estimation is common.
上述した通り、電流積算による算出法では、満充電容量Ａｈｆを用いて、ＳＯＣの変化量ΔＳＯＣを算出する。満充電容量Ａｈｆは、蓄電池の使用状態に応じて変化するため、ＳＯＣを精度よく算出するためには、適宜満充電容量Ａｈｆを学習する必要がある。 As described above, in the calculation method based on current integration, the SOC change amount ΔSOC is calculated using the full charge capacity Ahf. Since the full charge capacity Ahf changes according to the usage state of the storage battery, it is necessary to appropriately learn the full charge capacity Ahf in order to calculate the SOC accurately.
本実施形態の制御装置２０は、図２に示すように、リチウムイオン蓄電池１０の放電開始時（又は充電開始時）におけるＳＯＣ（ＳＯＣＡ）を算出する。その後、リチウムイオン蓄電池１０において放電（又は充電）を実施しながら電流積算を行い、充放電電流Ｉの時間積分値ΔＡｈを算出する。その後、放電終了後（又は充電終了後）におけるＳＯＣ（ＳＯＣＢ）を算出する。制御装置２０は、リチウムイオン蓄電池１０において充放電された電荷量、即ち、充放電電流Ｉの時間積分値ΔＡｈを、ＳＯＣの変化量ΔＳＯＣ（＝ＳＯＣＢ−ＳＯＣＡ）で除算することで、満充電容量Ａｈｆを算出する（Ａｈｆ＝ΔＡｈ／ΔＳＯＣ）。 As shown in FIG. 2, the control device 20 of the present embodiment calculates the SOC (SOCA) at the start of discharging (or at the start of charging) of the lithium ion storage battery 10. Thereafter, current integration is performed while discharging (or charging) is performed in the lithium ion storage battery 10, and a time integration value ΔAh of the charge / discharge current I is calculated. Thereafter, the SOC (SOCB) after the end of discharging (or after the end of charging) is calculated. The control device 20 divides the charge amount charged / discharged in the lithium ion storage battery 10, that is, the time integration value ΔAh of the charge / discharge current I by the SOC change amount ΔSOC (= SOCB−SOCA), so that the full charge capacity is reached. Ahf is calculated (Ahf = ΔAh / ΔSOC).
制御装置２０は、車両が駐車状態とされている場合に、ＭＯＳスイッチ１５及びＳＭＲスイッチ１６をともにオン状態とすることで、リチウムイオン蓄電池１０と鉛蓄電池４１との間で電流を流す。そして、その電流が流れる前後におけるＳＯＣ（ＳＯＣＡ，ＳＯＣＢ）と、電流が流れている期間における電流積算値ΔＡｈに基づいて、満充電容量Ａｈｆの学習値を算出する。ここで、駐車状態とは、車両が継続して停止される状態のことである。駐車状態では、回転電機４０、及び、スタータ４４の動作が停止される。また、電気負荷４５のうちドライバの操作に応じて駆動される駆動負荷の動作が停止される。また、ＥＣＵ３０を含む制御装置は、省電力状態とされ、車両の状態を定期的に監視する。さらに具体的には、車両の駐車状態とは、車両のイグニッションスイッチがオフ状態とされた状態である。 When the vehicle is parked, the control device 20 causes both the MOS switch 15 and the SMR switch 16 to turn on so that a current flows between the lithium ion storage battery 10 and the lead storage battery 41. Then, the learning value of the full charge capacity Ahf is calculated based on the SOC (SOCA, SOCB) before and after the current flows and the current integrated value ΔAh in the period during which the current flows. Here, the parking state is a state where the vehicle is continuously stopped. In the parking state, the operations of the rotating electrical machine 40 and the starter 44 are stopped. Moreover, the operation | movement of the drive load driven according to driver's operation among the electric loads 45 is stopped. The control device including the ECU 30 is in a power saving state and periodically monitors the state of the vehicle. More specifically, the vehicle parking state is a state in which the ignition switch of the vehicle is turned off.
図３に示すように、鉛蓄電池４１のＳＯＣ−開放端電圧特性は、リチウムイオン蓄電池１０のＳＯＣ−開放端電圧特性と比較して、傾きが小さく設定されている。また、リチウムイオン蓄電池１０のＳＯＣの使用領域内、より具体的には使用領域の略中央において、リチウムイオン蓄電池１０の開放端電圧と、鉛蓄電池４１の開放端電圧とが等しくなるように設定されている。このため、リチウムイオン蓄電池１０のＳＯＣがＳＯＣの使用領域の略中央から離れるほど、リチウムイオン蓄電池１０の開放端電圧と、鉛蓄電池４１の開放端電圧との差が大きくなる。つまり、リチウムイオン蓄電池１０のＳＯＣが使用領域の上限値近傍及び下限値近傍となる場合に、リチウムイオン蓄電池１０の開放端電圧と、鉛蓄電池４１の開放端電圧との差が大きくなる。 As shown in FIG. 3, the SOC-open-end voltage characteristic of the lead storage battery 41 is set to have a smaller slope than the SOC-open-end voltage characteristic of the lithium ion storage battery 10. Further, the open end voltage of the lithium ion storage battery 10 and the open end voltage of the lead storage battery 41 are set to be equal within the SOC usage range of the lithium ion storage battery 10, more specifically, substantially at the center of the use range. ing. For this reason, the difference between the open end voltage of the lithium ion storage battery 10 and the open end voltage of the lead storage battery 41 increases as the SOC of the lithium ion storage battery 10 moves away from the approximate center of the SOC usage region. That is, when the SOC of the lithium ion storage battery 10 is in the vicinity of the upper limit value and the lower limit value of the use region, the difference between the open end voltage of the lithium ion storage battery 10 and the open end voltage of the lead storage battery 41 increases.
図３に示すように、本実施形態では、リチウムイオン蓄電池１０の使用領域のうち、リチウムイオン蓄電池１０の開放端電圧と、鉛蓄電池４１の開放端電圧との差が所定の閾値Ｔｈ１以上となる領域（学習開始許可領域）において、満充電容量の学習の開始を許可する。つまり、リチウムイオン蓄電池１０のＳＯＣの使用領域において、ＳＯＣの高い領域と低い領域が、学習開始許可領域となる。また、リチウムイオン蓄電池１０の使用領域において、ＳＯＣが中程度となる領域が、満充電容量の学習の開始を許可としない学習開始不許可領域となる。 As shown in FIG. 3, in this embodiment, the difference between the open end voltage of the lithium ion storage battery 10 and the open end voltage of the lead storage battery 41 in the usage region of the lithium ion storage battery 10 is equal to or greater than a predetermined threshold Th1. In the region (learning start permission region), the start of learning of the full charge capacity is permitted. That is, in the SOC usage area of the lithium ion storage battery 10, the area where the SOC is high and the area where the SOC is low are the learning start permission area. Further, in the usage region of the lithium ion storage battery 10, a region where the SOC is medium is a learning start non-permission region that does not permit the start of learning of the full charge capacity.
本実施形態の制御装置２０は、回生発電時において、ＭＯＳスイッチ１５をオフ状態、ＳＭＲスイッチ１６をオン状態に設定することで、回転電機４０における発電電力を優先的にリチウムイオン蓄電池１０に充電することが可能である。また、リチウムイオン蓄電池１０の内部抵抗は、鉛蓄電池４１の内部抵抗より小さい。このため、リチウムイオン蓄電池１０の開放端電圧と鉛蓄電池４１の開放端電圧とがほぼ等しい場合、回転電機４０における回生発電時において、スイッチ１５，１６をともにオン状態にすると、鉛蓄電池４１と比較して、リチウムイオン蓄電池１０に優先的に充電を行うことが可能である。このため、車両の駐車時において、リチウムイオン蓄電池１０の開放端電圧は、鉛蓄電池４１の開放端電圧より高くすることが可能である。また、回転電機４０の駆動時において、ＭＯＳスイッチ１５をオフ状態、ＳＭＲスイッチ１６をオン状態に設定することで、回転電機４０における消費電力を優先的にリチウムイオン蓄電池１０から放電することも可能である。このため、車両の駐車状態において、リチウムイオン蓄電池１０の開放端電圧を鉛蓄電池４１の開放端電圧より低くすることも可能である。 The control device 20 of the present embodiment preferentially charges the generated power in the rotating electrical machine 40 to the lithium ion storage battery 10 by setting the MOS switch 15 to the off state and the SMR switch 16 to the on state during regenerative power generation. It is possible. Further, the internal resistance of the lithium ion storage battery 10 is smaller than the internal resistance of the lead storage battery 41. For this reason, when the open-circuit voltage of the lithium ion storage battery 10 and the open-circuit voltage of the lead storage battery 41 are substantially equal, when both the switches 15 and 16 are turned on during regenerative power generation in the rotating electrical machine 40, the comparison with the lead storage battery 41 is made. Thus, the lithium ion storage battery 10 can be preferentially charged. For this reason, the open end voltage of the lithium ion storage battery 10 can be made higher than the open end voltage of the lead storage battery 41 when the vehicle is parked. Further, when the rotating electrical machine 40 is driven, the MOS switch 15 is set to the off state and the SMR switch 16 is set to the on state, so that the power consumption in the rotating electrical machine 40 can be preferentially discharged from the lithium ion storage battery 10. is there. For this reason, it is also possible to make the open end voltage of the lithium ion storage battery 10 lower than the open end voltage of the lead storage battery 41 when the vehicle is parked.
制御装置２０は、車両が駐車状態であって、スイッチ１５，１６がオフ状態とされている状況で、リチウムイオン蓄電池１０の開放端電圧を取得し、ＳＯＣの初期値（ＳＯＣＡ）を取得する。その後、制御装置２０は、スイッチ１５，１６をオン状態とすることで、リチウムイオン蓄電池１０と鉛蓄電池４１との間に電流を流し、リチウムイオン蓄電池１０の充放電電流Ｉの検出値の時間積分値ΔＡｈを算出する。その後、制御装置２０は、リチウムイオン蓄電池１０の端子間電圧Ｖと鉛蓄電池４１の端子間電圧Ｖｐとの差が所定の閾値Ｔｈ２より小さくなった場合に、スイッチ１５，１６をオフ状態にする。制御装置２０は、スイッチ１５，１６がオフ状態とされている状況で、リチウムイオン蓄電池１０の開放端電圧を取得し、ＳＯＣの終了値（ＳＯＣＢ）を取得する。 The control device 20 acquires the open end voltage of the lithium ion storage battery 10 and the initial value (SOCA) of the SOC in a situation where the vehicle is parked and the switches 15 and 16 are turned off. Thereafter, the control device 20 turns on the switches 15 and 16 so that a current flows between the lithium ion storage battery 10 and the lead storage battery 41, and the time integration of the detected value of the charge / discharge current I of the lithium ion storage battery 10 is performed. The value ΔAh is calculated. Thereafter, the control device 20 turns off the switches 15 and 16 when the difference between the terminal voltage V of the lithium ion storage battery 10 and the terminal voltage Vp of the lead storage battery 41 becomes smaller than a predetermined threshold Th2. The control device 20 acquires the open circuit voltage of the lithium ion storage battery 10 and the SOC end value (SOCB) in a state where the switches 15 and 16 are in the OFF state.
このような制御を行うことで、リチウムイオン蓄電池１０のＳＯＣを使用領域の略中央値とすることができ、リチウムイオン蓄電池１０の劣化を防止できるとともに、満充電容量Ａｈｆの算出が可能になる。つまり、リチウムイオン蓄電池１０の過充電防止処理又は過放電防止処理と、満充電容量算出処理とを兼ねることができ、電源システムの電力効率を上げることが可能になる。 By performing such control, the SOC of the lithium ion storage battery 10 can be set to the approximate median value of the usage region, and the deterioration of the lithium ion storage battery 10 can be prevented and the full charge capacity Ahf can be calculated. That is, the overcharge prevention process or overdischarge prevention process of the lithium ion storage battery 10 can be combined with the full charge capacity calculation process, and the power efficiency of the power supply system can be increased.
本実施形態における図４に満充電容量算出処理を示す。本処理は、制御装置２０によって、所定周期Δｔごとに実施される。 FIG. 4 in the present embodiment shows the full charge capacity calculation process. This process is performed by the control device 20 every predetermined period Δt.
ステップＳ０１において、リチウムイオン蓄電池１０の端子間電圧Ｖ及び充放電電流Ｉの検出値を、及び、鉛蓄電池４１の端子間電圧Ｖｐを取得する。ステップＳ０２において、車両が駐車状態であるか否かを判定する。車両が駐車状態でない場合（Ｓ０２：ＮＯ）、処理を終了する。車両が駐車状態である場合（Ｓ０２：ＹＥＳ）、ステップＳ０３において、リチウムイオン蓄電池１０と鉛蓄電池４１との間での電荷移動の実施中であるか否かを判定する。 In step S01, the detected value of the inter-terminal voltage V and the charge / discharge current I of the lithium ion storage battery 10 and the inter-terminal voltage Vp of the lead storage battery 41 are acquired. In step S02, it is determined whether or not the vehicle is parked. If the vehicle is not parked (S02: NO), the process is terminated. When the vehicle is in a parked state (S02: YES), in step S03, it is determined whether or not charge transfer is being performed between the lithium ion storage battery 10 and the lead storage battery 41.
電荷移動の実施中でない場合（Ｓ０３：ＮＯ）、ステップＳ０４において、リチウムイオン蓄電池１０と鉛蓄電池４１との間での電荷移動が終了済みであるか否かを判定する。電荷移動の実施中でなく、かつ、電荷移動が終了済みでない場合（Ｓ０４：ＮＯ）、ステップＳ０５において、スイッチ１５，１６のオフ操作を実施する。なお、スイッチ１５，１６が既にオフ状態の場合、スイッチ１５，１６のオフ状態を継続する。ステップＳ０６において、リチウムイオン蓄電池１０が分極緩和済みであるか否かを判定する。具体的には、端子間電圧Ｖの検出値の今回値Ｖ（ｔ）と前回値Ｖ（ｔ−Δｔ）とを比較し、その差が所定値未満である場合に、分極緩和済みであると判定する。分極緩和済みでない場合（Ｓ０６：ＮＯ）、処理を終了する。 When the charge transfer is not in progress (S03: NO), it is determined in step S04 whether or not the charge transfer between the lithium ion storage battery 10 and the lead storage battery 41 has been completed. If the charge transfer is not being performed and the charge transfer is not completed (S04: NO), the switch 15 and the switch 16 are turned off in step S05. If the switches 15 and 16 are already in the off state, the switches 15 and 16 are kept off. In step S06, it is determined whether or not the lithium ion storage battery 10 has undergone polarization relaxation. Specifically, the current value V (t) of the detected value of the inter-terminal voltage V is compared with the previous value V (t−Δt), and when the difference is less than a predetermined value, the polarization has been relaxed. judge. If the polarization has not been relaxed (S06: NO), the process ends.
分極緩和済みの場合（Ｓ０６：ＹＥＳ）、ステップＳ０７において、端子間電圧Ｖの検出値を分極緩和済みの開放端電圧として取得し、その分極緩和済みの開放端電圧に基づいて、ＳＯＣの初期値ＳＯＣＡを算出する。ステップＳ０８において、リチウムイオン蓄電池１０の端子間電圧Ｖの検出値と、鉛蓄電池４１の端子間電圧Ｖｐの検出値との差ΔＶが所定の閾値Ｔｈ１より大きいか否かを判定する。差ΔＶが閾値Ｔｈ１より大きい場合（Ｓ０８：ＹＥＳ）、ステップＳ０９において、スイッチ１５，１６のオン操作を行う。ステップＳ１０において、電源システムの状態を電荷移動状態へと変更し、処理を終了する。差ΔＶが閾値Ｔｈ１以下の場合（Ｓ０８：ＮＯ）、ステップＳ１１において、電池ユニットＵの動作を停止して処理を終了する。 When the polarization has been relaxed (S06: YES), in step S07, the detected value of the inter-terminal voltage V is acquired as the polarization-released open-end voltage, and the initial value of the SOC is determined based on the polarization-relaxed open-end voltage. Calculate the SOCA. In step S08, it is determined whether or not the difference ΔV between the detected value of the inter-terminal voltage V of the lithium ion storage battery 10 and the detected value of the inter-terminal voltage Vp of the lead storage battery 41 is greater than a predetermined threshold Th1. When the difference ΔV is larger than the threshold Th1 (S08: YES), the switches 15 and 16 are turned on in step S09. In step S10, the state of the power supply system is changed to the charge transfer state, and the process ends. When the difference ΔV is equal to or smaller than the threshold value Th1 (S08: NO), the operation of the battery unit U is stopped and the process is terminated in step S11.
ステップＳ０３において、電荷移動状態であると判定されると（Ｓ０３：ＹＥＳ）、ステップＳ１２において、電流積算を実施する。具体的には、今回の充放電電流Ｉの検出値と周期Δｔとの積を、電流積算の前回値ΔＡｈ（ｔ−Δｔ）に対して加算することで、電流積算の今回値ΔＡｈ（ｔ）を算出する。なお、電流積算の初期値は０である。ステップＳ１３において、差ΔＶが所定の閾値Ｔｈ２以上か否かを判定する。差ΔＶが閾値Ｔｈ２以上の場合（Ｓ１３：ＹＥＳ）、ステップＳ１４において、スイッチ１５，１６のオン状態を継続する。差ΔＶが閾値Ｔｈ２より小さいことを条件として（Ｓ１３：ＮＯ）、ステップＳ１５において、電荷移動状態を終了し、ステップＳ１６において、スイッチ１５，１６をともにオフ状態に操作する。 If it is determined in step S03 that the charge transfer state is present (S03: YES), current integration is performed in step S12. Specifically, the current accumulated current value ΔAh (t) is obtained by adding the product of the detected value of the current charging / discharging current I and the period Δt to the previous accumulated current value ΔAh (t−Δt). Is calculated. Note that the initial value of current integration is zero. In step S13, it is determined whether or not the difference ΔV is greater than or equal to a predetermined threshold Th2. If the difference ΔV is greater than or equal to the threshold Th2 (S13: YES), the switches 15 and 16 are kept on in step S14. On condition that the difference ΔV is smaller than the threshold value Th2 (S13: NO), the charge transfer state is terminated in step S15, and both the switches 15 and 16 are operated in the off state in step S16.
ステップＳ０４において、電荷移動終了済みであると判定されると（Ｓ０４：ＹＥＳ）、ステップＳ１７において、リチウムイオン蓄電池１０が分極緩和済みであるか否かを判定する。具体的には、ステップＳ０６と同様に、端子間電圧Ｖの検出値の今回値Ｖ（ｔ）と前回値Ｖ（ｔ−Δｔ）とを比較し、今回値Ｖ（ｔ）と前回値Ｖ（ｔ−Δｔ）の差が所定値未満である場合に、分極緩和済みであると判定する。分極緩和済みでない場合（Ｓ１７：ＮＯ）、処理を終了する。 If it is determined in step S04 that the charge transfer has been completed (S04: YES), it is determined in step S17 whether or not the lithium ion storage battery 10 has been subjected to polarization relaxation. Specifically, as in step S06, the current value V (t) of the detected value of the inter-terminal voltage V is compared with the previous value V (t−Δt), and the current value V (t) and the previous value V ( When the difference of (t−Δt) is less than a predetermined value, it is determined that the polarization has been relaxed. If the polarization has not been relaxed (S17: NO), the process is terminated.
分極緩和済みの場合（Ｓ１７：ＹＥＳ）、ステップＳ１８において、端子間電圧Ｖの検出値を分極緩和済みの開放端電圧として取得し、その分極緩和済みの開放端電圧に基づいて、ＳＯＣの終了値ＳＯＣＢを算出する。ステップＳ１９において、ＳＯＣの変化量ΔＳＯＣ＝｜ＳＯＣＡ−ＳＯＣＢ｜が所定の閾値Ｔｈ３より大きいか否かを判定する。ＳＯＣの変化量ΔＳＯＣが所定の閾値Ｔｈ３より大きい場合（Ｓ１９：ＹＥＳ）、ステップＳ２０において、ＳＯＣの変化量ΔＳＯＣと、電流積算値ΔＡｈの比に基づいて、満充電容量Ａｈｆを算出する（Ａｈｆ＝ΔＡｈ／ΔＳＯＣ）。そして、ステップＳ１９において、ＳＯＣの変化量ΔＳＯＣが所定の閾値Ｔｈ３以下であると判定された場合（Ｓ１９：ＮＯ）、又は、ステップＳ２０の処理の後、ステップＳ１１において、電池ユニットＵの動作を終了して処理を終了する。 If the polarization has been relaxed (S17: YES), the detected value of the inter-terminal voltage V is obtained as the polarization-released open-end voltage in step S18, and the SOC end value is determined based on the polarization-relaxed open-end voltage. Calculate the SOCB. In step S19, it is determined whether or not the SOC change amount ΔSOC = | SOCA−SOCB | is greater than a predetermined threshold value Th3. When the SOC change amount ΔSOC is larger than the predetermined threshold Th3 (S19: YES), in step S20, the full charge capacity Ahf is calculated based on the ratio of the SOC change amount ΔSOC and the current integrated value ΔAh (Ahf = ΔAh / ΔSOC). If it is determined in step S19 that the SOC change ΔSOC is equal to or smaller than the predetermined threshold Th3 (S19: NO), or after the process of step S20, the operation of the battery unit U is terminated in step S11. To finish the process.
上述した処理のうち、ステップＳ０１の処理が「取得部」に相当し、ステップＳ０５，Ｓ０９，Ｓ１６の処理が「スイッチ操作部」に相当し、ステップＳ１９，Ｓ２０の処理が「学習部」に相当し、ステップＳ０７，Ｓ１８の処理が「充電率算出部」に相当する。 Among the processes described above, the process at step S01 corresponds to the “acquisition unit”, the processes at steps S05, S09, and S16 correspond to the “switch operation unit”, and the processes at steps S19 and S20 correspond to the “learning unit”. The processes in steps S07 and S18 correspond to a “charging rate calculation unit”.
以下、本実施形態の効果を述べる。 The effects of this embodiment will be described below.
駐車状態において、リチウムイオン蓄電池１０と鉛蓄電池４１との間で充放電電流Ｉを流す構成とした。この構成では、リチウムイオン蓄電池１０と鉛蓄電池４１はともに車両に搭載されているため、外部から車両に対する充放電を行うことなく、満充電容量Ａｈｆの取得を行うことが可能となる。 In the parking state, the charging / discharging current I is made to flow between the lithium ion storage battery 10 and the lead storage battery 41. In this configuration, since the lithium ion storage battery 10 and the lead storage battery 41 are both mounted on the vehicle, it is possible to acquire the full charge capacity Ahf without charging / discharging the vehicle from the outside.
さらに、駐車状態において、車両に搭載されている各種電気負荷４０，４４，４５の駆動が停止されているため、充放電電流Ｉの電流値は安定したものとなる。また、各種電気負荷４０，４４，４５の駆動が停止されているため、各種電気負荷４０，４４，４５の駆動に伴う放射ノイズを抑制できるため、電流センサ２５による充放電電流Ｉの検出値の取得に与える悪影響を抑制できる。 Furthermore, since the driving of the various electric loads 40, 44, 45 mounted on the vehicle is stopped in the parking state, the current value of the charge / discharge current I becomes stable. In addition, since the driving of the various electric loads 40, 44, 45 is stopped, radiation noise associated with the driving of the various electric loads 40, 44, 45 can be suppressed. The adverse effect on acquisition can be suppressed.
ＳＭＲスイッチ１６がオフ状態にされることで、リチウムイオン蓄電池１０は開放状態とされ、充放電が完全に停止される。そこで、リチウムイオン蓄電池１０と鉛蓄電池４１との間での充放電の開始時では、リチウムイオン蓄電池１０の分極が緩和した場合に、ＳＭＲスイッチ１６をオン状態に操作する直前において、リチウムイオン蓄電池１０の端子間電圧Ｖの検出値を取得し、その検出値を開放端電圧として用いる。リチウムイオン蓄電池１０と鉛蓄電池４１との間での充放電の終了時では、ＳＭＲスイッチ１６がオフ状態に操作された後、リチウムイオン蓄電池１０の分極が緩和した場合に、リチウムイオン蓄電池１０の端子間電圧Ｖの検出値を取得し、その検出値を開放端電圧として用いる。このような構成により、分極の影響を除去した開放端電圧を精度よく取得することが可能になる。分極の影響を除去した開放端電圧を用いて、ＳＯＣ（ＳＯＣＡ，ＳＯＣＢ）を算出することが可能になり、ＳＯＣの算出値の精度が向上し、その結果、満充電容量Ａｈｆの精度を向上させることが可能になる。 When the SMR switch 16 is turned off, the lithium ion storage battery 10 is opened, and charging / discharging is completely stopped. Therefore, at the start of charging / discharging between the lithium ion storage battery 10 and the lead storage battery 41, when the polarization of the lithium ion storage battery 10 is relaxed, immediately before the SMR switch 16 is turned on, the lithium ion storage battery 10 is turned on. The detected value of the inter-terminal voltage V is acquired, and the detected value is used as the open-circuit voltage. At the end of charging / discharging between the lithium ion storage battery 10 and the lead storage battery 41, when the polarization of the lithium ion storage battery 10 is relaxed after the SMR switch 16 is turned off, the terminal of the lithium ion storage battery 10 A detected value of the inter-voltage V is acquired, and the detected value is used as the open-circuit voltage. With such a configuration, it is possible to accurately acquire the open-ended voltage from which the influence of polarization is removed. It becomes possible to calculate SOC (SOCA, SOCB) using the open-circuit voltage from which the influence of polarization is removed, and the accuracy of the calculated value of SOC is improved. As a result, the accuracy of the full charge capacity Ahf is improved. It becomes possible.
本実施形態では、リチウムイオン蓄電池１０の端子間電圧Ｖと鉛蓄電池４１の端子間電圧Ｖｐとの差ΔＶが所定の閾値Ｔｈ１より大きい場合に、充放電電流Ｉを流す構成にした。リチウムイオン蓄電池１０の端子間電圧Ｖと、鉛蓄電池４１の端子間電圧Ｖｐとのリチウムイオン蓄電池１０の端子間電圧Ｖと、鉛蓄電池４１の端子間電圧Ｖｐとの差異が大きいほど、リチウムイオン蓄電池１０と鉛蓄電池４１との間での電荷の移動量、つまり、充放電電流Ｉの積算値ΔＡｈが大きくなる。このため、満充電容量Ａｈｆの算出値の精度を向上させることができる。 In the present embodiment, the charging / discharging current I is made to flow when the difference ΔV between the terminal voltage V of the lithium ion storage battery 10 and the terminal voltage Vp of the lead storage battery 41 is larger than a predetermined threshold Th1. The larger the difference between the inter-terminal voltage V of the lithium ion storage battery 10 and the inter-terminal voltage Vp of the lead storage battery 41 between the inter-terminal voltage V of the lithium ion storage battery 10 and the inter-terminal voltage Vp of the lead storage battery 41, the greater the lithium ion storage battery. 10 and the amount of charge transfer between the lead storage battery 41, that is, the integrated value ΔAh of the charge / discharge current I increases. For this reason, the accuracy of the calculated value of the full charge capacity Ahf can be improved.
本実施形態では、リチウムイオン蓄電池１０の端子間電圧Ｖと鉛蓄電池４１の端子間電圧Ｖｐとの差ΔＶが所定の閾値Ｔｈ２未満となるまで、充放電電流Ｉを流す構成にした。リチウムイオン蓄電池１０と鉛蓄電池４１との間での電荷の移動量、つまり、充放電電流の積算値ΔＡｈを大きくすることができ、満充電容量Ａｈｆの算出値の精度を向上させることができる。さらに、リチウムイオン蓄電池１０のＳＯＣが高い場合、リチウムイオン蓄電池１０のＳＯＣが低減されることになり、リチウムイオン蓄電池１０が過充電となることを抑制できる。また、リチウムイオン蓄電池１０のＳＯＣが低い場合、リチウムイオン蓄電池１０のＳＯＣ上昇されることになり、リチウムイオン蓄電池１０が過放電となることを抑制できる。 In the present embodiment, the charging / discharging current I is made to flow until the difference ΔV between the inter-terminal voltage V of the lithium ion storage battery 10 and the inter-terminal voltage Vp of the lead storage battery 41 becomes less than a predetermined threshold Th2. The amount of charge movement between the lithium ion storage battery 10 and the lead storage battery 41, that is, the integrated value ΔAh of the charge / discharge current can be increased, and the accuracy of the calculated value of the full charge capacity Ahf can be improved. Furthermore, when the SOC of the lithium ion storage battery 10 is high, the SOC of the lithium ion storage battery 10 is reduced, and the lithium ion storage battery 10 can be prevented from being overcharged. Moreover, when the SOC of the lithium ion storage battery 10 is low, the SOC of the lithium ion storage battery 10 is increased, and the lithium ion storage battery 10 can be prevented from being overdischarged.
ＳＯＣの変化量ΔＳＯＣが所定値の閾値Ｔｈ３より大きい場合に、満充電容量Ａｈｆの算出値を学習する構成とした。これにより、満充電容量Ａｈｆの学習値の精度を向上させることができる。 When the SOC change ΔSOC is larger than a predetermined threshold value Th3, the calculated value of the full charge capacity Ahf is learned. Thereby, the precision of the learning value of the full charge capacity Ahf can be improved.
リチウムイオン蓄電池は、鉛電池などと比較して、ＳＯＣを正確に取得することが望まれる。本実施形態の構成によれば、リチウムイオン蓄電池１０について、精度よく満充電容量Ａｈｆを算出し、学習することが可能になる。その結果、ＳＯＣを精度よく取得することが可能になる。 Lithium ion storage batteries are desired to acquire SOC more accurately than lead batteries or the like. According to the configuration of this embodiment, the full charge capacity Ahf can be accurately calculated and learned for the lithium ion storage battery 10. As a result, the SOC can be obtained with high accuracy.
（第２実施形態）
図５に第２実施形態における満充電容量学習処理のフローチャートを示す。本処理は、制御装置２０により所定周期Δｔごとに実施される。本処理では、リチウムイオン蓄電池１０の開放端電圧を、リチウムイオン蓄電池１０の端子間電圧Ｖの検出値と、リチウムイオン蓄電池１０の充放電電流Ｉの検出値に基づいて取得する。なお、図４に示す第１実施形態における満充電容量学習処理のフローチャートと同一の構成について、同一の符号を付し、適宜説明を省略する。
(Second Embodiment)
FIG. 5 shows a flowchart of the full charge capacity learning process in the second embodiment. This process is performed by the control device 20 every predetermined period Δt. In this process, the open end voltage of the lithium ion storage battery 10 is acquired based on the detected value of the inter-terminal voltage V of the lithium ion storage battery 10 and the detected value of the charge / discharge current I of the lithium ion storage battery 10. In addition, about the structure same as the flowchart of the full charge capacity learning process in 1st Embodiment shown in FIG. 4, the same code | symbol is attached | subjected and description is abbreviate | omitted suitably.
図５に示す処理では、図４に示すステップＳ０６，Ｓ１７における分極緩和判定に代えて、ステップＳ２１，Ｓ２２においてそれぞれ開放端電圧を算出する。具体的には、リチウムイオン蓄電池１０の端子間電圧Ｖに加え、リチウムイオン蓄電池１０に流れた充放電電流Ｉの検出値の過去値及びリチウムイオン蓄電池１０の温度に基づいて、リチウムイオン蓄電池１０の開放端電圧から分極の影響を除去した値を算出する。そして、ステップＳ０７では、ステップＳ２１において算出された開放端電圧の算出値に基づいて、充放電におけるＳＯＣの初期値ＳＯＣＡを算出する。また、ステップＳ１８では、ステップＳ２２において算出された開放端電圧の算出値に基づいて、充放電におけるＳＯＣの終了値ＳＯＣＢを算出する。ステップＳ２１，Ｓ２２の処理が、「開放端電圧算出部」に相当する。 In the process shown in FIG. 5, instead of the polarization relaxation determination in steps S06 and S17 shown in FIG. 4, open-circuit voltages are calculated in steps S21 and S22, respectively. Specifically, in addition to the voltage V between the terminals of the lithium ion storage battery 10, based on the past value of the detected value of the charge / discharge current I flowing in the lithium ion storage battery 10 and the temperature of the lithium ion storage battery 10, A value obtained by removing the influence of polarization from the open-circuit voltage is calculated. In step S07, an initial value SOCA of SOC in charging / discharging is calculated based on the calculated value of the open circuit voltage calculated in step S21. In step S18, the SOC end value SOCB in charge / discharge is calculated based on the calculated open-end voltage calculated in step S22. The processing of steps S21 and S22 corresponds to an “open end voltage calculation unit”.
（他の実施形態）
・分極が緩和したか否かの判定を、リチウムイオン蓄電池１０の端子間電圧Ｖの検出値の時間変化量に基づいて行う構成に代えて、ＳＭＲスイッチ１６がオフ状態とされた後、所定の分極緩和時間が経過した場合に、リチウムイオン蓄電池１０の分極が緩和したと判定する構成であってもよい。
(Other embodiments)
In place of the configuration in which the determination as to whether or not the polarization has been relaxed is based on the amount of change in the detected value of the inter-terminal voltage V of the lithium ion storage battery 10 over time, after the SMR switch 16 is turned off, The configuration may be such that the polarization of the lithium ion storage battery 10 is determined to have relaxed when the polarization relaxation time has elapsed.
・リチウムイオン蓄電池１０の端子間電圧Ｖと、鉛蓄電池４１の端子間電圧Ｖｐとの差ΔＶによらず、満充電容量Ａｈｆを学習する処理としてもよい。つまり、図４のステップＳ０８を省略する構成としてもよい。 -It is good also as a process which learns full charge capacity | capacitance Ahf irrespective of difference (DELTA) V of the voltage V between the terminals of the lithium ion storage battery 10, and the voltage Vp between the terminals of the lead storage battery 41. FIG. That is, it is good also as a structure which abbreviate | omits step S08 of FIG.
・図４のステップＳ１３，Ｓ１５，Ｓ１６において、リチウムイオン蓄電池１０の端子間電圧Ｖと鉛蓄電池４１の端子間電圧Ｖｐとの差ΔＶが所定の閾値Ｔｈ２未満である場合に、電荷移動を終了し、スイッチ１５，１６をオフ操作する構成としたが、これを変更してもよい、例えば、スイッチ１５，１６をオン状態とし、リチウムイオン蓄電池１０と鉛蓄電池４１との間で電流を流し始めた後、所定時間経過後にスイッチ１５，１６をオフ状態とする構成としてもよい。また、スイッチ１５，１６をオン状態とし、リチウムイオン蓄電池１０と鉛蓄電池４１との間で電流を流し始めた後、リチウムイオン蓄電池１０の充放電電流Ｉの検出値が所定値以下になった場合に、スイッチ１５，１６をオフ状態とする構成としてもよい。 In Steps S13, S15, and S16 of FIG. 4, when the difference ΔV between the terminal voltage V of the lithium ion storage battery 10 and the terminal voltage Vp of the lead storage battery 41 is less than a predetermined threshold Th2, the charge transfer is terminated. The switches 15 and 16 are turned off. However, the switches 15 and 16 may be changed. For example, the switches 15 and 16 are turned on, and a current starts flowing between the lithium ion storage battery 10 and the lead storage battery 41. Thereafter, the switches 15 and 16 may be turned off after a predetermined time has elapsed. In addition, when the switches 15 and 16 are turned on and the current value between the lithium ion storage battery 10 and the lead storage battery 41 starts to flow, and then the detected value of the charge / discharge current I of the lithium ion storage battery 10 becomes a predetermined value or less. In addition, the switches 15 and 16 may be turned off.
第１蓄電池としてリチウムイオン蓄電池以外のものを用いてもよい。例えば、ニッケル水素蓄電池や、鉛蓄電池であってもよい。また、第２蓄電池として、鉛蓄電池以外のものを用いてもよい。例えば、リチウムイオン蓄電池や、ニッケル水素蓄電池であってもよい。 You may use things other than a lithium ion storage battery as a 1st storage battery. For example, a nickel hydride storage battery or a lead storage battery may be used. Moreover, you may use things other than a lead storage battery as a 2nd storage battery. For example, a lithium ion storage battery or a nickel hydride storage battery may be used.
・ＭＯＳスイッチ１５、及び、ＳＭＲスイッチ１６のいずれか一方を省略する構成としてもよい。 A configuration in which one of the MOS switch 15 and the SMR switch 16 is omitted may be employed.
１０…リチウムイオン蓄電池、１５…ＭＯＳスイッチ、１６…ＳＭＲスイッチ、２０…制御装置、２５…電流センサ、４１…鉛蓄電池。 DESCRIPTION OF SYMBOLS 10 ... Lithium ion storage battery, 15 ... MOS switch, 16 ... SMR switch, 20 ... Control apparatus, 25 ... Current sensor, 41 ... Lead storage battery.
Claims (9)
前記第１蓄電池に流れる充放電電流の検出値を電流検出部（２５）から取得する取得部と、
前記車両が駐車状態において、前記スイッチをオフ状態からオン状態に操作することで、前記第１蓄電池と前記第２蓄電池との間で前記充放電電流を流すスイッチ操作部と、
前記スイッチ操作部により前記スイッチがオン状態とされている期間において、前記第１蓄電池の充電率の変化量と、前記充放電電流の検出値の積算値と、に基づいて、前記第１蓄電池の満充電容量を算出し、その算出された満充電容量を学習する学習部と、を備えていることを特徴とする制御装置。 On-board power supply mounted on a vehicle, comprising a first storage battery (10), a second storage battery (41), and switches (15, 16) provided between the first storage battery and the second storage battery A power supply system control device (20) for controlling the system,
An acquisition unit for acquiring a detection value of a charge / discharge current flowing in the first storage battery from a current detection unit (25);
When the vehicle is in a parked state, by operating the switch from an off state to an on state, a switch operation unit that causes the charge / discharge current to flow between the first storage battery and the second storage battery;
Based on the amount of change in the charging rate of the first storage battery and the integrated value of the detected value of the charge / discharge current during the period in which the switch is turned on by the switch operation unit, the first storage battery. A control device comprising: a learning unit that calculates a full charge capacity and learns the calculated full charge capacity.
前記取得部は、前記第１蓄電池の端子間電圧の電圧検出部（２６）から検出値を取得し、
前記スイッチ操作部は、前記車両が駐車状態である場合に、前記スイッチをオフ状態に操作した後、前記第１蓄電池の分極が緩和した場合に、前記スイッチをオン状態に操作するものであって、
前記充電率算出部は、前記スイッチをオン状態に操作する直前の前記第１蓄電池の端子間電圧の検出値を前記第１蓄電池の開放端電圧として用いることを特徴とする請求項２に記載の制御装置。 The first storage battery is one that stops charging and discharging when the switch is turned off,
The acquisition unit acquires a detection value from the voltage detection unit (26) of the terminal voltage of the first storage battery,
The switch operation unit is configured to operate the switch in an on state when the vehicle is in a parked state and the switch is turned off and then the polarization of the first storage battery is relaxed. ,
The said charge rate calculation part uses the detected value of the voltage between the terminals of the said 1st storage battery just before operating the said switch as an ON state as an open end voltage of the said 1st storage battery. Control device.
前記取得部は、前記第１蓄電池の端子間電圧の検出値を電圧検出部（２６）から取得し、
前記スイッチ操作部は、前記スイッチをオフ状態からオン状態に操作することで、前記第１蓄電池と前記第２蓄電池との間で前記充放電電流を流した後、前記スイッチをオン状態からオフ状態に操作することで前記第１蓄電池の充放電を停止するものであって、
前記充電率算出部は、前記スイッチがオン状態からオフ状態に操作された後、前記第１蓄電池の分極が緩和した場合に、前記第１蓄電池の端子間電圧の検出値を前記第１蓄電池の開放端電圧として用いることを特徴とする請求項２又は３に記載の制御装置。 The first storage battery is one that stops charging and discharging when the switch is turned off,
The acquisition unit acquires a detection value of the voltage across the terminals of the first storage battery from the voltage detection unit (26),
The switch operation unit operates the switch from an off state to an on state, thereby allowing the charge / discharge current to flow between the first storage battery and the second storage battery, and then switching the switch from the on state to the off state. To stop charging / discharging of the first storage battery,
The charge rate calculation unit calculates a detected value of the voltage between the terminals of the first storage battery when the polarization of the first storage battery is relaxed after the switch is operated from the on state to the off state. The control device according to claim 2, wherein the control device is used as an open-end voltage.
前記第１蓄電池の端子間電圧の検出値、及び、第１蓄電池の充放電電流の検出値に基づいて、前記第１蓄電池の開放端電圧を算出する開放端電圧算出部を備えていることを特徴とする請求項２乃至４のいずれか１項に記載の制御装置。 The acquisition unit acquires a detection value of the voltage across the terminals of the first storage battery from the voltage detection unit (26),
An open end voltage calculation unit that calculates an open end voltage of the first storage battery based on a detection value of a voltage between terminals of the first storage battery and a detection value of a charge / discharge current of the first storage battery. The control apparatus according to claim 2, wherein the control apparatus is characterized in that:
前記スイッチ操作部は、前記車両が駐車状態であり、さらに、前記第１蓄電池の端子間電圧の検出値と、前記第２蓄電池の端子間電圧の検出値との差が所定値より大きい場合に、前記スイッチをオン状態に操作することで前記第１蓄電池と前記第２蓄電池との間に電流を流すことを特徴とする請求項１乃至５のいずれか１項に記載の制御装置。 The acquisition unit acquires a detection value of a voltage between terminals of the first storage battery and the second storage battery from a voltage detection unit (26),
When the vehicle is in a parked state and the difference between the detected value of the terminal voltage of the first storage battery and the detected value of the terminal voltage of the second storage battery is greater than a predetermined value, the switch operation unit The control device according to claim 1, wherein a current is passed between the first storage battery and the second storage battery by operating the switch to an on state.
前記スイッチ操作部は、前記スイッチをオフ状態からオン状態に操作することで、前記第１蓄電池と前記第２蓄電池との間で前記充放電電流を流した後、前記第１蓄電池の端子間電圧の検出値と、前記第２蓄電池の端子間電圧の検出値との差が所定値より小さくなったことを条件として、前記スイッチをオン状態からオフ状態に操作することを特徴とする請求項１乃至６のいずれか１項に記載の制御装置。 The acquisition unit acquires a detection value of a voltage between terminals of the first storage battery and the second storage battery from a voltage detection unit (26),
The switch operation unit operates the switch from an off state to an on state, thereby allowing the charge / discharge current to flow between the first storage battery and the second storage battery, and then the voltage across the terminals of the first storage battery. The switch is operated from an on state to an off state on condition that the difference between the detected value of the second storage battery and the detected value of the voltage across the terminals of the second storage battery is smaller than a predetermined value. The control device according to any one of 1 to 6.
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| JP7092013B2 (en) * | 2018-08-07 | 2022-06-28 | トヨタ自動車株式会社 | Power control unit |
| US11148546B2 (en) * | 2018-08-07 | 2021-10-19 | Toyota Jidosha Kabushiki Kaisha | Power supply control device |
| JP7145035B2 (en) | 2018-10-29 | 2022-09-30 | 本田技研工業株式会社 | LEARNING DEVICE, LEARNING METHOD, AND PROGRAM |
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