JP2002170600A - Operation circuit and operation method of residual content of battery - Google Patents
Operation circuit and operation method of residual content of batteryInfo
- Publication number
- JP2002170600A JP2002170600A JP2000366226A JP2000366226A JP2002170600A JP 2002170600 A JP2002170600 A JP 2002170600A JP 2000366226 A JP2000366226 A JP 2000366226A JP 2000366226 A JP2000366226 A JP 2000366226A JP 2002170600 A JP2002170600 A JP 2002170600A
- Authority
- JP
- Japan
- Prior art keywords
- remaining amount
- battery
- voltage
- circuit
- current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims description 27
- 238000005070 sampling Methods 0.000 claims description 11
- 238000004364 calculation method Methods 0.000 claims description 10
- 230000010354 integration Effects 0.000 abstract description 3
- 238000001514 detection method Methods 0.000 abstract description 2
- 238000007599 discharging Methods 0.000 description 28
- 230000007423 decrease Effects 0.000 description 6
- 230000006870 function Effects 0.000 description 6
- 230000001133 acceleration Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 230000001172 regenerating effect Effects 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 1
- 101000868880 Homo sapiens Serpin B13 Proteins 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 102100037591 Neuroserpin Human genes 0.000 description 1
- 102100032322 Serpin B13 Human genes 0.000 description 1
- 101000959880 Solanum tuberosum Aspartic protease inhibitor 4 Proteins 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 108010080874 neuroserpin Proteins 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
Landscapes
- Tests Of Electric Status Of Batteries (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、主としてハイブリ
ッドカーに搭載される電池の残存量を正確に演算する回
路と方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates mainly to a circuit and a method for accurately calculating a remaining amount of a battery mounted on a hybrid car.
【０００２】[0002]
【従来の技術】二次電池は、満充電や過放電させると電
気的な特性が急激に低下する。電池性能を低下させるこ
となく電池を長い寿命で使用するためには、電池の残存
量を正確に検出して、過充電または過放電とならないよ
うに充放電を制御することが大切である。過充電と過放
電を防止する充放電の制御方法からさらに進んで、残存
量が約５０％の近傍となるように充放電を制御する方法
は、より長い期間にわたって電池性能を低下させないで
使用できる。この充放電の制御方法は、大容量の電池を
搭載するために、電池コストが極めて高いハイブリッド
カーの充放電の制御に使用される。2. Description of the Related Art When a secondary battery is fully charged or overdischarged, its electrical characteristics are rapidly reduced. In order to use the battery for a long life without deteriorating the battery performance, it is important to accurately detect the remaining amount of the battery and control charging and discharging so as not to cause overcharging or overdischarging. Going further from the charge / discharge control method for preventing overcharge and overdischarge, the method for controlling the charge / discharge so that the remaining amount is close to about 50% can be used for a longer period without lowering the battery performance. . This charging / discharging control method is used for controlling charging / discharging of a hybrid car having a very high battery cost because a large-capacity battery is mounted.
【０００３】電池の過充電と過放電を防止すると共に、
さらに進んで、残存量が特定の範囲となるように充放電
を制御するには、電池の残存量を正確に検出することが
大切である。電池の残存量は、充電電流の積算値から放
電電流の積算値を減算して計算できる。電池の残存量が
正確に演算できると仮定すれば、残存量が１００％にに
なる前に充電を停止し、また、残存量が０％となる前に
放電を停止して過充電と過放電を防止できる。また、残
存量が５０％を中心として所定の範囲で充放電して、電
池性能の低下を最小にして使用できる。[0003] While preventing overcharge and overdischarge of the battery,
To further control the charge and discharge so that the remaining amount falls within a specific range, it is important to accurately detect the remaining amount of the battery. The remaining amount of the battery can be calculated by subtracting the integrated value of the discharging current from the integrated value of the charging current. Assuming that the remaining amount of the battery can be accurately calculated, charging is stopped before the remaining amount reaches 100%, and discharging is stopped before the remaining amount reaches 0%, resulting in overcharging and overdischarging. Can be prevented. Further, the battery can be charged / discharged within a predetermined range with a remaining amount of 50% as a center, and the battery performance can be minimized.
【０００４】しかしながら、電池の残存量を、全く誤差
のない状態で正確に演算するのは極めて難しい。残存量
は、充電電流と放電電流の積算値から計算されるが、こ
の方法は、充放電を繰り返すと誤差が累積して次第に大
きくなる。このため、演算された残存量と実際の電池の
残存量とに誤差ができる。[0004] However, it is extremely difficult to accurately calculate the remaining amount of the battery without any error. The remaining amount is calculated from the integrated value of the charging current and the discharging current. However, in this method, when charging and discharging are repeated, errors accumulate and gradually increase. Therefore, there is an error between the calculated remaining amount and the actual remaining amount of the battery.
【０００５】従来の残存量の演算方法は、電池の残存量
の累積誤差を少なくするために、特定の条件になると電
池を満充電し、あるいは完全に放電して残存量を補正し
ている。このことを実現するためには、使用範囲から校
正ポイント電圧になるまで継続して充電し、あるいは放
電させる必要がある。In the conventional method of calculating the remaining amount, the battery is fully charged or completely discharged under specific conditions to correct the remaining amount in order to reduce the accumulated error in the remaining amount of the battery. In order to realize this, it is necessary to continuously charge or discharge from the use range to the calibration point voltage.
【０００６】[0006]
【発明が解決しようとする課題】校正ポイント電圧にな
るまで充電し、あるいは放電して残存量を校正する方法
は、満充電し、あるいは完全放電させて電池の残存量を
補正するが、この方法は校正のために充電あるいは放電
させるときに、電池の使用状態が制限される欠点があ
る。たとえば、校正のために充電しているときには、電
池から負荷への電力供給が制限される。また、校正のた
めに放電しているときには、電池の充電が制限される。A method of calibrating the remaining amount by charging or discharging until reaching the calibration point voltage corrects the remaining amount of the battery by fully charging or completely discharging the battery. However, there is a disadvantage that the use state of the battery is limited when charging or discharging for calibration. For example, when charging for calibration, power supply from the battery to the load is limited. When discharging for calibration, charging of the battery is limited.
【０００７】電池の充電と放電に制約を受けることは、
あらゆる用途において、電池を理想的な状態では使用で
きなくする。たとえば、ハイブリッドカーのモーターを
駆動する電池の充放電方法においては、非常に困った弊
害が発生する。自動車を加速するときに放電できない状
態になると、走行用のモーターを駆動できなって、モー
ターによる加速が不可能となり、自動車の加速は著しく
悪くなる。モーターを走行用に使用している自動車は、
エンジンの効率をよくするために、ほとんど例外なく加
速のときにモーターを回転させる。いいかえると、エン
ジンによる加速を制限して燃料効率を向上させるように
設計しているので、モーターによる加速が期待できない
と、極めて加速の悪い自動車となる。さらに、常時はモ
ーターで加速できる自動車が、電池の容量校正のタイミ
ングになるとモーターによる加速ができなくなるので、
自動車をスムーズに加速できなくなり、交通安全の点に
おいても決して好ましくはない。さらに、減速している
ときに残存量を補正するために充電が禁止されると、回
生制動による減速がなくなってブレーキのみの制動とな
って制動力が急減に変動して危険な状態となることがあ
る。また、この状態で回生制動で発生する電力を電池の
充電に有効に利用できなくなって、充電効率も悪くなる
欠点もある。[0007] Restrictions on battery charging and discharging are
In any application, make the battery unusable under ideal conditions. For example, in a method of charging and discharging a battery that drives a motor of a hybrid car, a very troublesome problem occurs. If the vehicle cannot be discharged when the vehicle is accelerated, the motor for driving can be driven, and the acceleration by the motor becomes impossible, and the acceleration of the vehicle becomes extremely poor. Cars that use motors for driving
To increase the efficiency of the engine, the motor spins almost exclusively during acceleration. In other words, because it is designed to improve fuel efficiency by limiting the acceleration by the engine, if acceleration by the motor cannot be expected, the car will be extremely poorly accelerated. Furthermore, a car that can always be accelerated by a motor cannot be accelerated by a motor when the battery capacity calibration timing comes.
The car cannot be accelerated smoothly, which is not preferable in terms of traffic safety. Furthermore, if charging is prohibited to correct the remaining amount during deceleration, deceleration due to regenerative braking will be lost and braking will only be applied, and the braking force will suddenly decrease, resulting in a dangerous state. There is. Further, in this state, the power generated by the regenerative braking cannot be effectively used for charging the battery, and there is a disadvantage that the charging efficiency is deteriorated.
【０００８】残存量の補正を中止してこの弊害は解消で
きるが、残存量を補正しないで使用される電池は、過充
電や過放電によって寿命が短くなり、あるいは残存量を
所定の範囲で使用できなくなって電池寿命は著しく短く
なることがある。自動車用の電池パックは、多数の二次
電池を使用して高価となるので、いかにして寿命を長く
できるかは極めて大切なことである。[0008] This problem can be solved by stopping the correction of the remaining amount, but the battery used without correcting the remaining amount has a short life due to overcharging or overdischarging, or the remaining amount is used within a predetermined range. Battery life may be significantly shortened. Since a battery pack for an automobile is expensive using a large number of secondary batteries, it is extremely important how the life can be extended.
【０００９】さらに、ハイブリッドカーに限らず、あら
ゆる用途に使用される電池は、充電と放電が制約される
と、便利に使用できなくなる欠点がある。[0009] Furthermore, batteries used for all purposes, not limited to hybrid cars, have the disadvantage that they cannot be conveniently used if charging and discharging are restricted.
【００１０】本発明は、従来のこのような欠点を解決す
ることを目的に開発されたものである。本発明の重要な
目的は、電池を満充電あるいは完全放電させることなく
残存量を補正して、正確に残存量を検出できる残存量演
算回路と演算方法を提供することにある。[0010] The present invention has been developed with the object of solving such a conventional disadvantage. An important object of the present invention is to provide a remaining amount calculation circuit and a calculation method which can correct the remaining amount without fully charging or completely discharging the battery and accurately detect the remaining amount.
【００１１】[0011]
【課題を解決するための手段】本発明の電池の残存量演
算回路は、電池３に流れる充放電電流を積算して残存量
を演算する電流積算回路４と、電池３の定電流状態にお
ける電圧をパラメーターとする残存量である電圧−残存
量関係を記憶する記憶回路２と、電池３の電流を検出し
て、電池３の電流が定電流状態であると、記憶回路２に
記憶している電圧−残存量関係から補正残存量を検出す
る残存量補正回路５とを備える。この残存量演算回路
は、電池３に流れる電流が所定の時間に定電流状態にな
ると、残存量補正回路５が記憶回路２に記憶している電
圧−残存量関係から補正残存量を検出し、この補正残存
量で電流積算回路４が検出している残存量を補正する。According to the present invention, a circuit for calculating the remaining amount of a battery according to the present invention comprises a current integrating circuit 4 for calculating the remaining amount by integrating the charging / discharging current flowing through the battery 3, and a voltage for the battery 3 in a constant current state. And a storage circuit 2 for storing a voltage-remaining amount relationship, which is a remaining amount with the parameter as a parameter, and detecting the current of the battery 3 and storing that the current of the battery 3 is in a constant current state. A remaining amount correction circuit for detecting a corrected remaining amount from a voltage-remaining amount relationship; When the current flowing through the battery 3 enters a constant current state for a predetermined time, the remaining amount calculation circuit detects the corrected remaining amount from the voltage-remaining amount relationship stored in the storage circuit 2 by the remaining amount correction circuit 5, The remaining amount detected by the current integrating circuit 4 is corrected using the corrected remaining amount.
【００１２】さらに、本発明の請求項２の残存量演算回
路は、ハイブリッドカーのモーター９を駆動する電池３
に流れる充放電電流を積算して残存量を演算する電流積
算回路４と、イグニッションスイッチをオンにしたとき
の電池３の最低電圧をパラメーターとする残存量のであ
る電圧−残存量関係を記憶する記憶回路２と、イグニッ
ションスイッチがオンに切り換えられたときの最低電圧
を検出して、記憶回路２に記憶している電圧−残存量関
係から補正残存量を検出する残存量補正回路５とを備え
る。この残存量演算回路は、イグニッションスイッチを
オンにするときに、残存量補正回路５が記憶回路２に記
憶している電圧−残存量関係から補正残存量を検出し、
この補正残存量で電流積算回路４が検出している残存量
を補正する。Further, according to a second aspect of the present invention, there is provided a remaining amount calculating circuit for driving a battery 3 for driving a motor 9 of a hybrid car.
A current integrating circuit 4 for integrating the charge / discharge current flowing through the battery and calculating a remaining amount, and a memory for storing a voltage-remaining amount relationship which is a remaining amount using the minimum voltage of the battery 3 when the ignition switch is turned on as a parameter. The circuit includes a circuit and a remaining amount correction circuit for detecting a minimum voltage when the ignition switch is turned on and detecting a corrected remaining amount from a voltage-residual amount relationship stored in the storage circuit. When the ignition switch is turned on, the remaining amount calculation circuit detects a corrected remaining amount from the voltage-remaining amount relationship stored in the storage circuit 2 by the remaining amount correction circuit 5,
The remaining amount detected by the current integrating circuit 4 is corrected using the corrected remaining amount.
【００１３】本発明の請求項６の電池の残存量演算方法
は、電池３に流れる充放電電流を積算して残存量を演算
すると共に、電池３の定電流状態における電圧をパラメ
ーターとする残存量である電圧−残存量関係を記憶し、
電池３の電流を検出して、電池３の電流が定電流状態で
あるときに、記憶回路２に記憶している電圧−残存量関
係から補正残存量を検出して残存量を補正する。According to a sixth aspect of the present invention, there is provided a method of calculating a remaining amount of a battery, wherein the remaining amount is calculated by integrating a charging / discharging current flowing through the battery and calculating a remaining amount using a voltage of the battery in a constant current state as a parameter. The voltage-remaining amount relationship is stored as
When the current of the battery 3 is detected and the current of the battery 3 is in the constant current state, the corrected remaining amount is detected from the voltage-remaining amount relationship stored in the storage circuit 2 to correct the remaining amount.
【００１４】さらに、本発明の請求項７の電池の残存量
演算方法は、ハイブリッドカーのモーター９を駆動する
電池３に流れる充放電電流を積算して残存量を演算し、
イグニッションスイッチをオンにしたときの電池３の最
低電圧をパラメーターとする残存量である電圧−残存量
関係を記憶し、イグニッションスイッチをオンにすると
きの最低電圧を検出して、記憶回路２に記憶している電
圧−残存量関係から補正残存量を検出し、補正残存量で
残存量を補正する。Further, according to a seventh aspect of the present invention, there is provided a method for calculating a remaining amount of a battery by integrating a charge / discharge current flowing through a battery 3 for driving a motor 9 of a hybrid car.
A voltage-remaining amount relationship, which is a remaining amount with the minimum voltage of the battery 3 when the ignition switch is turned on as a parameter, is stored. The lowest voltage when the ignition switch is turned on is detected and stored in the storage circuit 2. The corrected remaining amount is detected from the voltage-remaining amount relationship, and the remaining amount is corrected using the corrected remaining amount.
【００１５】電圧−残存量関係は、テーブルまたは関数
として記憶回路２に記憶することができる。The voltage-remaining amount relationship can be stored in the storage circuit 2 as a table or a function.
【００１６】電池３の電流が定電流状態であるときに残
存量を補正する演算回路と演算方法は、所定のサンプリ
ング周期で電池電圧を検出し、連続して検出した電圧値
が設定範囲よりも小さくなる回数が設定回数よりも多く
なると定電流と判定して電池３の電圧を検出して補正残
存量を検出することができる。An arithmetic circuit and an arithmetic method for correcting the remaining amount when the current of the battery 3 is in a constant current state are as follows. The battery voltage is detected at a predetermined sampling cycle, and the continuously detected voltage value exceeds the set range. When the number of times of decrease becomes larger than the set number of times, it is determined that the current is constant, and the voltage of the battery 3 is detected to detect the remaining correction amount.
【００１７】イグニッションスイッチがオンに切り換え
られたときの最低電圧を検出して残存量を補正する演算
回路は、始動電圧としてエンジン７を始動するときの最
低電圧を検出することができる。An arithmetic circuit for detecting the lowest voltage when the ignition switch is turned on and correcting the remaining amount can detect the lowest voltage when starting the engine 7 as the starting voltage.
【００１８】[0018]
【発明の実施の形態】以下、本発明の実施例を図面に基
づいて説明する。ただし、以下に示す実施例は、本発明
の技術思想を具体化するための電池の残存量を演算する
演算回路と演算方法を例示するものであって、本発明は
演算回路と演算方法を以下のものに特定しない。Embodiments of the present invention will be described below with reference to the drawings. However, the embodiments described below exemplify an arithmetic circuit and an arithmetic method for calculating the remaining amount of the battery for embodying the technical idea of the present invention. Not specific to
【００１９】さらに、この明細書は、特許請求の範囲を
理解しやすいように、実施例に示される部材に対応する
番号を、「特許請求の範囲の欄」、および「課題を解決
するための手段の欄」に示される部材に付記している。
ただ、特許請求の範囲に示される部材を、実施例の部材
に特定するものでは決してない。Further, in this specification, in order to make it easy to understand the claims, the numbers corresponding to the members shown in the embodiments will be referred to as “claims” and “ In the column of “means”.
However, the members described in the claims are not limited to the members of the embodiments.
【００２０】図１は、電池の残存量演算回路を搭載する
ハイブリッドカーの回路図である。残存量演算回路は、
バッテリＥＣＵ１と記憶回路２とを備える。バッテリＥ
ＣＵ１は、電池３の充放電の電流を積算して残存量を演
算する電流積算回路４と、演算した残存量を正確な値に
補正する残存量補正回路５とを内蔵している。図はバッ
テリＥＣＵ１の動作をわかりやすくするために、電流積
算回路４と残存量補正回路５とを別々の回路として記載
しているが、バッテリＥＣＵは、たとえば内蔵するひと
つのＣＰＵで両方の回路の動作をさせることもできる。
バッテリＥＣＵ１で演算された残存量は、ハイブリッド
カーのメインコントローラーであるＨＥＶ−ＥＣＵ６に
出力される。ＨＥＶ−ＥＣＵ６は、ブレーキやアクセル
の入力信号で、エンジン７とインバータ８を制御してハ
イブリッドカーの走行状態を制御する。FIG. 1 is a circuit diagram of a hybrid car equipped with a circuit for calculating the remaining battery charge. The remaining amount calculation circuit is
It includes a battery ECU 1 and a storage circuit 2. Battery E
The CU 1 has a built-in current integrating circuit 4 for integrating the charge / discharge current of the battery 3 to calculate the remaining amount, and a remaining amount correcting circuit 5 for correcting the calculated remaining amount to an accurate value. In the figure, in order to make the operation of the battery ECU 1 easy to understand, the current integration circuit 4 and the remaining amount correction circuit 5 are described as separate circuits. You can also make it work.
The remaining amount calculated by battery ECU 1 is output to HEV-ECU 6, which is the main controller of the hybrid car. The HEV-ECU 6 controls the running state of the hybrid car by controlling the engine 7 and the inverter 8 based on the input signals of the brake and the accelerator.
【００２１】バッテリＥＣＵ１には、電池３に流れる電
流と、電池電圧と、電池温度の信号が入力される。電流
積算回路４は、電池３の充放電で残存量を演算する。残
存量は、充電電流の積算値である充電容量から、放電電
流の積算値である放電容量を減算して演算される。充電
容量は、充電電流の積算値に充電効率をかけてより正確
に演算することができる。電流積算回路４は、充放電の
電流を積算するために、一定のサンプリング周期で電流
を検出している。電流を検出するサンプリング周期は、
たとえば約１００ｍｓｅｃとするが、数十ｍｓｅｃ〜数
百ｍｓｅｃとすることもできる。充電容量は、検出した
充電電流と時間の積、すなわち充電電流とサンプリング
周期の積で演算される。さらに好ましくは、この値に充
電効率をかけて正確な充電容量を演算する。放電容量
は、検出した放電電流とサンプリング周期の積で演算さ
れる。The battery ECU 1 receives signals of a current flowing through the battery 3, a battery voltage, and a battery temperature. The current integrating circuit 4 calculates the remaining amount by charging and discharging the battery 3. The remaining amount is calculated by subtracting the discharge capacity, which is the integrated value of the discharge current, from the charge capacity, which is the integrated value of the charge current. The charging capacity can be calculated more accurately by multiplying the integrated value of the charging current by the charging efficiency. The current integrating circuit 4 detects the current at a constant sampling cycle in order to integrate the charging / discharging current. The sampling period for detecting the current is
For example, it is about 100 msec, but it can be several tens msec to several hundred msec. The charging capacity is calculated by the product of the detected charging current and time, that is, the product of the charging current and the sampling period. More preferably, the charging efficiency is multiplied by this value to calculate an accurate charging capacity. The discharge capacity is calculated by the product of the detected discharge current and the sampling cycle.
【００２２】このようにして残存量を演算すると、時間
が経過するにしたがって演算した残存量に誤差が累積
し、実際の電池の残存量と演算した残存量とに差ができ
る。演算する残存量に誤差が発生するのは、たとえば、
充電電流や放電電流の検出誤差、充電効率が変化するこ
とによる誤差、さらに、サンプリング周期の間に電流が
変化することによる誤差等が発生するからである。この
誤差は、時間の経過とともに累積されて大きくなる。残
存量補正回路５は、特定の環境で使用されるときに、電
池３の残存量を正確に補正する。When the remaining amount is calculated in this manner, errors accumulate in the calculated remaining amount as time elapses, and a difference is made between the actual remaining amount of the battery and the calculated remaining amount. An error occurs in the calculated remaining amount, for example,
This is because a detection error of the charging current or the discharging current, an error due to a change in the charging efficiency, an error due to a change in the current during the sampling period, and the like occur. This error accumulates over time and increases. The remaining amount correction circuit 5 accurately corrects the remaining amount of the battery 3 when used in a specific environment.
【００２３】残存量補正回路５は、電池３が定電流で充
電または放電されるときに、電圧をパラメーターとして
残存量を補正する。ハイブリッドカーの残存量補正回路
５は、イグニッションスイッチをオンにするときの最低
電圧をパラメーターとして補正残存量を検出して、充放
電電流を積算した残存量を補正する。とくに、イグニッ
ションスイッチをオンにしたときに流れるチャージアッ
プ電流は、周囲の温度等に影響されることが少ないの
で、チャージアップ電流が流れるときの最低電圧で補正
残存量を検出する方法は、残存量を正確に補正できる。The remaining amount correction circuit 5 corrects the remaining amount using the voltage as a parameter when the battery 3 is charged or discharged with a constant current. The remaining amount correction circuit 5 of the hybrid car detects the corrected remaining amount using the minimum voltage at the time of turning on the ignition switch as a parameter, and corrects the remaining amount obtained by integrating the charge / discharge current. In particular, the charge-up current that flows when the ignition switch is turned on is hardly affected by the ambient temperature, etc.Therefore, the method of detecting the corrected remaining amount at the lowest voltage when the charge-up current flows is based on the remaining amount. Can be accurately corrected.
【００２４】電池３は、一定の定電流で充放電し、ある
いはハイブリッドカーにおいてはイグニッションスイッ
チをオンにしてチャージアップ電流を流すとき、残存量
の大きさで電圧が変化する特性がある。したがって、定
電流で充放電し、あるいはイグニッションスイッチをオ
ンにしてチャージアップ電流を流すときに電圧を検出す
ると、検出した電圧の大きさで残存量を特定できる。こ
の特性は、ニッケル−水素電池、ニッケル−カドミウム
電池、リチウムイオン二次電池等の全ての二次電池に共
通する。ただ、二次電池のタイプと電流の大きによっ
て、残存量が同じであっても電池の残存量は変化する。
したがって、残存量補正回路５には、接続している電池
３の電圧−残存量関係を記憶する記憶回路２を接続して
いる。The battery 3 has a characteristic that when charged and discharged with a constant current, or in a hybrid car, when the ignition switch is turned on and a charge-up current flows, the voltage changes depending on the remaining amount. Therefore, when the voltage is detected when charging / discharging with a constant current or turning on an ignition switch to supply a charge-up current, the remaining amount can be specified by the magnitude of the detected voltage. This characteristic is common to all secondary batteries such as a nickel-hydrogen battery, a nickel-cadmium battery, and a lithium ion secondary battery. However, depending on the type of the secondary battery and the magnitude of the current, the remaining amount of the battery changes even if the remaining amount is the same.
Therefore, the storage circuit 2 that stores the voltage-remaining amount relationship of the connected battery 3 is connected to the remaining amount correction circuit 5.
【００２５】記憶回路２は、電池３の定電流状態におけ
る電圧をパラメーターとし、あるいはイグニッション
スイッチをオンにしてチャージアップ電流が流れるとき
の電池３の最低電圧をパラメーターとして補正残存量を
特定する「電圧−残存量関係」を記憶している。記憶回
路２は、電圧−残存量関係をテーブルで記憶し、あるい
は、関数として記憶している。電圧−残存量関係のテー
ブルは、電流と電圧をパラメーターとして残存量を特定
する。このテーブルは、電圧と電流のみでなく、温度を
もパラメーターとして残存量を特定するテーブルとする
こともできる。電圧−残存量の関数も、電流と電圧をパ
ラメーターとして残存量を計算できる関数、さらに、電
流と電圧と温度をパラメーターとして残存量を計算でき
る関数である。The storage circuit 2 specifies the remaining amount of correction using the voltage of the battery 3 in the constant current state as a parameter or the minimum voltage of the battery 3 when the charge-up current flows by turning on the ignition switch. The "voltage-remaining amount relationship" is stored. The storage circuit 2 stores the voltage-remaining amount relationship in a table or as a function. The voltage-residual amount table specifies the residual amount using current and voltage as parameters. This table may be a table for specifying the remaining amount using not only the voltage and the current but also the temperature as a parameter. The voltage-remaining amount function is also a function that can calculate the remaining amount using current and voltage as parameters, and a function that can calculate the remaining amount using current, voltage, and temperature as parameters.
【００２６】バッテリＥＣＵ１は、電流積算回路４また
は残存量補正回路５で電池に流れる電流が定電流状態に
あるかどうかを検出し、定電流状態にあるときの電池電
圧を検出する。さらに、バッテリＥＣＵ１は、イグニッ
ションスイッチがオンになってチャージアップ電流が流
れることを検出し、チャージアップ電流が流れるときに
は、電池３の最低電圧を検出する。電池電圧または最低
電圧を検出すると、この電圧をパラメーターとして、電
圧−残存量関係から補正残存量を検出する。The battery ECU 1 detects whether or not the current flowing through the battery is in a constant current state by the current integrating circuit 4 or the remaining amount correction circuit 5, and detects the battery voltage when in the constant current state. Further, the battery ECU 1 detects that a charge-up current flows when the ignition switch is turned on, and detects a minimum voltage of the battery 3 when the charge-up current flows. When the battery voltage or the minimum voltage is detected, the corrected remaining amount is detected from the voltage-remaining amount relationship using the voltage as a parameter.
【００２７】定電流状態にあるかどうかは、設定時間に
サンプリングした電流値が設定範囲にあるかどうかで判
別する。たとえば、設定時間に連続してサンプリングし
た電流値が、平均値に対して５％以内にあるとき、この
時間帯において定電流状態であると判別する。定電流状
態にあるかどうかを判別する設定時間は、たとえば３０
秒に設定するが、５秒〜１分程度とすることもできる。
設定時間を長くすると、定電流状態になる頻度が少なく
なるので残存量を補正する頻度も少なくなるが、より正
確に残存量を補正できる。反対に定電流状態と判定する
設定時間を短くすると、定電流状態となる頻度が多くな
って残存量を補正できる回数は多くなるが、定電流状態
における残存量の精度は低下する。したがって、定電流
状態と判別する設定時間は、要求される残存量の精度と
頻度とを考慮して、前述の範囲で最適値とする。Whether the current value is in the constant current state is determined based on whether the current value sampled at the set time is within the set range. For example, when the current value sampled continuously during the set time is within 5% of the average value, it is determined that the current is constant in this time zone. The set time for determining whether or not the apparatus is in the constant current state is, for example, 30
Although set to seconds, it may be set to about 5 seconds to 1 minute.
If the set time is lengthened, the frequency of the constant current state decreases, and the frequency of correcting the remaining amount decreases. However, the remaining amount can be corrected more accurately. Conversely, if the set time for determining the constant current state is shortened, the frequency of the constant current state increases and the number of times that the remaining amount can be corrected increases, but the accuracy of the remaining amount in the constant current state decreases. Therefore, the set time for determining the constant current state is set to an optimal value within the above-described range in consideration of the required accuracy and frequency of the remaining amount.
【００２８】電池３の電圧をサンプリングする周期が１
００ｍｓｅｃで、設定時間を３０秒とする場合、連続し
て３００回サンプリングした電圧値が設定範囲にあると
きに定電流状態と判別する。定電流状態を判別するサン
プリング回数とサンプリング周期の積が設定時間を特定
する。The cycle of sampling the voltage of the battery 3 is 1
When the set time is set to 30 seconds at 00 msec, the constant current state is determined when the voltage value sampled continuously 300 times is within the set range. The product of the number of sampling times and the sampling period for determining the constant current state specifies the set time.
【００２９】定電流状態と判別する設定範囲は、たとえ
ば電流の平均値に対して＋−５％に設定する。ただ、設
定範囲は、平均値の＋−３〜１０％とすることもでき
る。設定範囲を狭くすると、より正確に残存量を補正で
きるが、補正できる頻度が少なくなる。反対に設定範囲
を広くすると、残存量を補正できる頻度は多くなるが、
精度は低下する。したがって、定電流状態と判別する電
流のばらつきである設定範囲も、要求される精度と頻度
を考慮して最適値とする。The set range for determining the constant current state is set to, for example, + -5% with respect to the average value of the current. However, the setting range can be set to + -3 to 10% of the average value. If the setting range is narrowed, the remaining amount can be corrected more accurately, but the frequency of correction can be reduced. Conversely, increasing the setting range will increase the frequency at which the remaining amount can be corrected,
Accuracy decreases. Therefore, the setting range, which is the variation of the current determined as the constant current state, is also set to the optimum value in consideration of the required accuracy and frequency.
【００３０】さらに、バッテリＥＣＵ１は、チャージア
ップ電流が流れることも検出する。チャージアップ電流
は、電池３に流れる電流波形とピーク電流から検出でき
るが、イグニッションスイッチがオンになったことを検
出して正確に検出できる。また、イグニッションスイッ
チがオンに切り換えられたことと、電流波形とピーク電
流から、さらに正確にチャージアップ電流を検出でき
る。ハイブリッドカーは、イグニッションスイッチをオ
ンに切り換えると、電池３からインバータ８にチャージ
アップ電流が供給される。インバータ８は、電池３から
供給されるチャージアップ電流でモーター９を始動し、
あるいはインバータ８に接続している大容量のコンデン
サー１０を充電する。Further, battery ECU 1 also detects that a charge-up current flows. The charge-up current can be detected from the current waveform flowing through the battery 3 and the peak current, but can be accurately detected by detecting that the ignition switch has been turned on. Further, the charge-up current can be detected more accurately from the fact that the ignition switch has been turned on and the current waveform and the peak current. When the ignition switch is turned on in the hybrid car, a charge-up current is supplied from the battery 3 to the inverter 8. The inverter 8 starts the motor 9 with the charge-up current supplied from the battery 3,
Alternatively, a large-capacity capacitor 10 connected to the inverter 8 is charged.
【００３１】残存量補正回路５は、定電流状態にあると
きは電池３の電圧を検出し、さらに、チャージアップ電
流が流れるときは、電池３の最低電圧を検出し、検出し
た電圧や最低電圧から補正残存量を検出する。電圧に対
する補正残存量は、記憶回路２に記憶される電圧−残存
量関係で検出される。補正残存量が検出されると、充放
電の電流を積算して演算された残存量を補正残存量で補
正する。The remaining amount correction circuit 5 detects the voltage of the battery 3 when in the constant current state, and further detects the minimum voltage of the battery 3 when the charge-up current flows, and detects the detected voltage and the minimum voltage. , The remaining amount of correction is detected. The corrected remaining amount for the voltage is detected based on the voltage-remaining amount relationship stored in the storage circuit 2. When the corrected remaining amount is detected, the charge / discharge current is integrated, and the calculated remaining amount is corrected by the corrected remaining amount.
【００３２】さらに、残存量補正回路５は、電池３の開
放電圧を検出して補正残存量を検出することもできる。
開放電圧から残存量を検出する方法は、電池３を相当の
時間にわたって充放電させない状態とした後に開放電圧
を検出し、この開放電圧から補正残存量を検出する。充
放電した直後の電池３の開放電圧は、充放電の電流に影
響を受けて上下するので、補正残存量を正確に検出でき
ないからである。開放電圧を検出する前に、電池３の充
放電を実質的に停止させる期間は、たとえば、数分〜数
時間以上とする。ハイブリッドカーのイグニッションス
イッチをオンにする直前の電池３の開放電圧は、ほとん
ど例外なくこの条件を満足する。イグニッションスイッ
チをオンにする前に、ハイブリッドカーは停止してお
り、電池を充放電させない状態にあるからである。した
がって、イグニッションスイッチをオンにする直前の電
池３の開放電圧を検出し、この開放電圧から補正残存量
を検出することもできる。開放電圧から補正残存量を検
出するための電圧−残存量関係は、テーブルまたは関数
として記憶回路２に記憶させる。Further, the remaining amount correction circuit 5 can detect the open voltage of the battery 3 to detect the corrected remaining amount.
In the method of detecting the remaining amount from the open circuit voltage, the battery 3 is not charged / discharged for a considerable time, and then the open circuit voltage is detected, and the corrected remaining amount is detected from the open circuit voltage. This is because the open-circuit voltage of the battery 3 immediately after charging / discharging rises and falls under the influence of the charging / discharging current, so that the corrected remaining amount cannot be accurately detected. Before detecting the open-circuit voltage, the period during which charging and discharging of the battery 3 are substantially stopped is, for example, several minutes to several hours or more. The open circuit voltage of the battery 3 immediately before turning on the ignition switch of the hybrid car satisfies this condition almost without exception. This is because the hybrid car is stopped before the ignition switch is turned on, and the battery is not charged or discharged. Therefore, the open circuit voltage of the battery 3 immediately before the ignition switch is turned on can be detected, and the remaining correction amount can be detected from the open circuit voltage. The voltage-remaining amount relationship for detecting the corrected remaining amount from the open circuit voltage is stored in the storage circuit 2 as a table or a function.
【００３３】バッテリＥＣＵ１は、図２に示すステップ
で、以下のフローチャートのようにして充放電の電流を
積算して演算した残存量を補正する。この図は、イグニ
ッションスイッチをオンにしてチャージアップ電流が流
れるときに、電池３の最低電圧を検出して補正残存量を
検出するステップを示している。 ［ｎ＝１〜３のステップ］ハイブリッドカーのイグニッ
ションスイッチがオンに切り換えられると、バッテリＥ
ＣＵ１が初期化され、電池３の開放電圧（ＯＣＶ）が検
出される。 ［ｎ＝４〜５のステップ］検出した電池３の開放電圧か
ら第１補正残存量を検出し、検出した第１補正残存量が
一時的に格納される。このステップで第１補正残存量を
検出するために、記憶回路２に記憶される電圧−残存量
関係が残存量補正回路５に読み込まれる。 ［ｎ＝６のステップ］イグニッションスイッチがオンに
なってリレーがオンに切り換えられる。 ［ｎ＝７のステップ］インバータ８がチャージアップさ
れて、このときの最大電流が読み取られる。チャージア
ップ電流の最大値を読み取るために、電流の最大値がホ
ールド回路に記憶される。この最大電流値がホールド回
路から残存量補正回路５に入力されて、チャージアップ
電流の最大値が読み取られる。 ［ｎ＝８のステップ］チャージアップ電流が流れる状態
における最低電圧が読み取られる。最低電圧を読み取る
ために、電圧の最小値がホールド回路に記憶される。こ
の最小電圧値がホールド回路から残存量補正回路５に入
力されて最低電圧が読み取られる。 ［ｎ＝９のステップ］検出した最低電圧を以下の式で補
正する。 Ｖ＝Ｖm−（Ｉ−Ｉm）×Ｚ ただし、この式において、Ｖmは検出した最低電圧 Ｉは基準電流 Ｉmはチャージアップ電流の最大値 Ｚは電池の内部抵抗である。 ［ｎ＝１０のステップ］チャージアップ電流が流れると
きの電池の電圧低下（ΔＶ）を下記の式で演算し、この
電圧低下から第２補正残存量を演算する。 ΔＶ＝Ｖ−ＯＣＶ この方法は、チャージアップ電流が流れるときの電圧低
下（ΔＶ）から補正残存量を演算しているが、電圧低下
（ΔＶ）によらず最低電圧のみから補正残存量を演算す
ることもできる。電圧低下（ΔＶ）と最低電圧は実質的
には同じ電圧である。それは、電圧低下（ΔＶ）は最低
電圧から計算されるからである。電圧低下（ΔＶ）から
補正残存量を演算する場合、記憶回路２には電圧低下
（ΔＶ）から補正残存量を演算する電圧−残存量関係を
記憶させる。る。 ［ｎ＝１１のステップ］演算された第２補正残存量を一
時的に格納する。 ［ｎ＝１２〜１４のステップ］第１補正残存量と第２補
正残存量の差を演算し、この差が１０％よりも小さいか
どうかを判定し、差が１０％よりも小さいと、第１補正
残存量と第２補正残存量の平均値を補正残存量として、
充放電電流を積算した残存量を補正する。差が１０％よ
りも大きいと、第１補正残存量と第２補正残存量が適当
でないと判断して、補正残存量で残存量を補正しない。In the step shown in FIG. 2, the battery ECU 1 corrects the remaining amount calculated by integrating the charging and discharging currents as shown in the following flowchart. This figure shows a step of detecting the minimum voltage of the battery 3 and detecting the remaining correction amount when the ignition switch is turned on and a charge-up current flows. [Steps n = 1 to 3] When the ignition switch of the hybrid car is turned on, the battery E
CU1 is initialized, and the open circuit voltage (OCV) of the battery 3 is detected. [Step n = 4 to 5] The first correction remaining amount is detected from the detected open circuit voltage of the battery 3 and the detected first correction remaining amount is temporarily stored. In this step, the voltage-residual amount relationship stored in the storage circuit 2 is read into the residual amount correction circuit 5 in order to detect the first corrected residual amount. [Step n = 6] The ignition switch is turned on and the relay is turned on. [Step n = 7] The inverter 8 is charged up, and the maximum current at this time is read. To read the maximum value of the charge-up current, the maximum value of the current is stored in the hold circuit. This maximum current value is input from the hold circuit to the remaining amount correction circuit 5, and the maximum value of the charge-up current is read. [Step n = 8] The lowest voltage in the state where the charge-up current flows is read. To read the minimum voltage, the minimum value of the voltage is stored in the hold circuit. This minimum voltage value is input from the hold circuit to the remaining amount correction circuit 5, and the minimum voltage is read. [Step of n = 9] The detected minimum voltage is corrected by the following equation. V = Vm− (I−Im) × Z where Vm is the detected minimum voltage I is the reference current Im is the maximum value of the charge-up current Z is the internal resistance of the battery. [Step n = 10] The voltage drop (ΔV) of the battery when the charge-up current flows is calculated by the following formula, and the second correction remaining amount is calculated from this voltage drop. ΔV = V−OCV In this method, the remaining correction amount is calculated from the voltage drop (ΔV) when the charge-up current flows, but the correction remaining amount is calculated from only the minimum voltage regardless of the voltage drop (ΔV). You can also. The voltage drop (ΔV) and the minimum voltage are substantially the same voltage. This is because the voltage drop (ΔV) is calculated from the lowest voltage. When calculating the remaining correction amount from the voltage drop (ΔV), the storage circuit 2 stores the voltage-remaining amount relationship for calculating the corrected remaining amount from the voltage drop (ΔV). You. [Step n = 11] The calculated second correction remaining amount is temporarily stored. [Steps n = 12 to 14] The difference between the first corrected remaining amount and the second corrected remaining amount is calculated, and it is determined whether or not the difference is smaller than 10%. The average value of the first corrected remaining amount and the second corrected remaining amount is defined as the corrected remaining amount.
The remaining amount obtained by integrating the charge / discharge current is corrected. If the difference is greater than 10%, it is determined that the first corrected remaining amount and the second corrected remaining amount are not appropriate, and the remaining amount is not corrected using the corrected remaining amount.
【００３４】ハイブリッドカーが走行する状態、すなわ
ち、電池３が充放電される状態では、図３に示すステッ
プで、以下のフローチャートで残存量を補正残存量で補
正する。 ［ｎ＝１のステップ］電池３に流れる電流を読み取る。 ［ｎ＝２〜３のステップ］読み取った電流値（Ｉm）
と、区間平均電流（Ｉa）との差を計算し、この差が区
間平均電流の５％以内であるかどうかを判別し、差が５
％よりも大きいと、カウンタのＮを０にリセットしてｎ
＝１のステップにループする。区間平均電流（Ｉa）
は、連続してサンプリングした電流を平均して演算す
る。 ［ｎ＝４〜５のステップ］電流値（Ｉm）と区間平均電
流（Ｉa）の差が５％よりも小さいと、このステップで
カウンタに１をプラスする。カウンタのカウント値が３
００を越えるまでは、ｎ＝１のステップにループし、カ
ウント値が３００を越えると、次のステップに進む。 ［ｎ＝６〜７のステップ］区間平均電流（Ｉa）が１０
Ａよりも大きいかどうかを判定し、１０Ａよりも小さい
と、電池電圧を検出して電圧をパラメーターとして電圧
−残存量関係から補正残存量を演算する。補正残存量
は、記憶回路２に記憶される１０Ａ以下の電圧−残存量
関係から演算される。補正残存量で電流の積算値である
残存量を補正する。 ［ｎ＝８〜９のステップ］区間平均電流（Ｉa）が３０
Ａよりも大きいかどうかを判定し、３０Ａよりも小さい
と、電池電圧を検出して電圧をパラメーターとして電圧
−残存量関係から補正残存量を演算する。補正残存量
は、記憶回路２に記憶される１０〜３０Ａの電圧−残存
量関係から演算される。演算された補正残存量で電流の
積算値である残存量を補正する。 ［ｎ＝１０〜１１のステップ］区間平均電流（Ｉa）が
５０Ａよりも大きいかどうかを判定し、５０Ａよりも小
さいと、電池電圧を検出して電圧をパラメーターとして
電圧−残存量関係から補正残存量を演算する。補正残存
量は、記憶回路２に記憶される３０〜５０Ａ以下の電圧
−残存量関係から演算される。演算された補正残存量で
電流の積算値である残存量を補正する。When the hybrid car is running, that is, when the battery 3 is charged and discharged, the remaining amount is corrected by the remaining amount in the following flowchart in the steps shown in FIG. [Step n = 1] The current flowing through the battery 3 is read. [Steps for n = 2 to 3] Current value (Im) read
And the section average current (Ia) are calculated, and it is determined whether or not this difference is within 5% of the section average current.
%, The counter N is reset to 0 and n
Loop to step = 1. Section average current (Ia)
Is calculated by averaging continuously sampled currents. [Step n = 4 to 5] If the difference between the current value (Im) and the section average current (Ia) is smaller than 5%, 1 is added to the counter in this step. The count value of the counter is 3
Until the count exceeds 00, the process loops to the step of n = 1, and when the count value exceeds 300, the process proceeds to the next step. [Steps for n = 6 to 7] Average section current (Ia) is 10
It is determined whether it is larger than A, and if it is smaller than 10 A, the battery voltage is detected and the corrected remaining amount is calculated from the voltage-remaining amount relationship using the voltage as a parameter. The corrected remaining amount is calculated from the voltage-remaining amount relationship of 10 A or less stored in the storage circuit 2. The remaining amount, which is the integrated value of the current, is corrected by the corrected remaining amount. [Steps for n = 8 to 9] The section average current (Ia) is 30
It is determined whether it is greater than A, and if it is less than 30A, the battery voltage is detected and the corrected remaining amount is calculated from the voltage-remaining amount relationship using the voltage as a parameter. The corrected remaining amount is calculated from the voltage-remaining amount relationship of 10 to 30 A stored in the storage circuit 2. The calculated remaining amount is used to correct the remaining amount, which is the integrated value of the current. [Steps n = 10 to 11] It is determined whether or not the section average current (Ia) is greater than 50 A. If the average current (Ia) is less than 50 A, the battery voltage is detected and the residual voltage is corrected from the voltage-remaining amount relationship using the voltage as a parameter. Calculate the quantity. The corrected remaining amount is calculated from the voltage-remaining amount relationship of 30 to 50 A or less stored in the storage circuit 2. The calculated remaining amount is used to correct the remaining amount, which is the integrated value of the current.
【００３５】[0035]
【発明の効果】本発明の請求項１の残存量演算回路と請
求項６の残存量演算方法は、電池を満充電あるいは完全
放電させることなく残存量を補正して、正確に残存量を
検出できる特長がある。それは、本発明の演算回路と演
算方法が、電池の電流が定電流状態であるときに、定電
流状態における電圧をパラメーターとする残存量である
電圧−残存量関係から補正残存量を検出して残存量を補
正しているからである。本発明の演算回路と演算方法
は、電池を定電流で充放電するときに、残存量の大きさ
で電圧が変化する特性を利用したもので、定電流状態に
おける電圧をパラメーターとして補正残存量を検出する
ことによって、電池を満充電あるいは完全放電させるこ
となく残存量を正確に補正できる。According to the remaining amount calculating circuit of the present invention and the remaining amount calculating method of the present invention, the remaining amount is corrected without fully charging or completely discharging the battery, and the remaining amount is accurately detected. There are features that can be done. That is, the arithmetic circuit and the arithmetic method of the present invention detect the corrected remaining amount from the voltage-remaining amount relationship, which is the remaining amount with the voltage in the constant current state as a parameter, when the battery current is in the constant current state. This is because the remaining amount is corrected. The arithmetic circuit and the arithmetic method of the present invention make use of the characteristic that the voltage changes with the magnitude of the remaining amount when charging and discharging the battery with a constant current. By detecting, the remaining amount can be accurately corrected without fully charging or completely discharging the battery.
【００３６】さらに、本発明の請求項２の残存量演算回
路と請求項７の残存量演算方法は、とくに、ハイブリッ
ドカーの電池の残存量を極めて簡単に補正して、正確に
残存量を検出できる特長がある。それは、この残存量演
算回路と演算方法が、イグニッションスイッチをオンに
するときの最低電圧を検出して、電池の最低電圧をパラ
メーターとする残存量である電圧−残存量関係から補正
残存量を検出して残存量を補正しているからである。ハ
イブリッドカーにおいては、イグニッションスイッチを
オンにしてチャージアップ電流を流すときの電圧の大き
さで電池の残存量を特定できる特性がある。したがっ
て、この演算回路と演算方法は、イグニッションスイッ
チをオンにするときの最低電圧をパラメーターとして補
正残存量を検出することによって、残存量を正確に補正
できる。とくに、この演算回路と演算方法は、ハイブリ
ッドカーを走行させる状態でなく、イグニッションスイ
ッチをオンにするときの最低電圧で残存量を補正するの
で、簡単かつ安全に、電池の残存量を補正できる。Further, the remaining amount calculating circuit and the remaining amount calculating method according to the present invention can correct the remaining amount of the battery of the hybrid car very easily and detect the remaining amount accurately. There are features that can be done. This is because the remaining amount calculation circuit and the calculation method detect the minimum voltage when turning on the ignition switch, and detect the corrected remaining amount from the voltage-remaining amount relationship, which is the remaining amount using the minimum voltage of the battery as a parameter. This is because the remaining amount is corrected. The hybrid car has a characteristic that the remaining amount of the battery can be specified by the magnitude of the voltage when the charge switch current is supplied by turning on the ignition switch. Therefore, the arithmetic circuit and the arithmetic method can correct the remaining amount accurately by detecting the corrected remaining amount using the minimum voltage at the time of turning on the ignition switch as a parameter. In particular, since the arithmetic circuit and the arithmetic method correct the remaining amount at the minimum voltage when the ignition switch is turned on, not in the state where the hybrid car is running, the remaining amount of the battery can be easily and safely corrected.
【図１】本発明の実施例の電池の残存量演算回路を搭載
するハイブリッドカーの回路図FIG. 1 is a circuit diagram of a hybrid car equipped with a circuit for calculating a remaining battery amount according to an embodiment of the present invention
【図２】本発明の実施例の残存量演算方法で補正残存量
を検出して電池の残存量を補正するステップを示すフロ
ーチャートFIG. 2 is a flowchart showing steps of detecting a corrected remaining amount and correcting the remaining amount of the battery by the remaining amount calculating method according to the embodiment of the present invention;
【図３】本発明の他の実施例の残存量演算方法で補正残
存量を検出して電池の残存量を補正するステップを示す
フローチャートFIG. 3 is a flowchart showing steps of detecting a corrected remaining amount and correcting the remaining amount of the battery by a remaining amount calculation method according to another embodiment of the present invention.
【符号の説明】 １…バッテリＥＣＵ ２…記憶回路 ３…電池 ４…電流積算回路 ５…残存量補正回路 ６…ＨＥＶ−ＥＣＵ ７…エンジン ８…インバータ ９…モーター １０…コンデンサー[Description of Signs] 1 ... Battery ECU 2 ... Storage Circuit 3 ... Battery 4 ... Current Accumulation Circuit 5 ... Remaining Amount Correction Circuit 6 ... HEV-ECU 7 ... Engine 8 ... Inverter 9 ... Motor 10 ... Condenser
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 2G016 CA03 CB11 CB12 CB22 CB32 CC01 CC03 CC04 CC24 5G003 AA07 BA01 DA07 EA05 FA06 GB06 GC05 5H030 AA08 AS08 FF42 FF44 FF51 5H115 PA11 PC06 PI12 PI13 PO02 PU25 PV07 PV09 PV22 QN03 QN08 SE06 TI02 TU06 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2G016 CA03 CB11 CB12 CB22 CB32 CC01 CC03 CC04 CC24 5G003 AA07 BA01 DA07 EA05 FA06 GB06 GC05 5H030 AA08 AS08 FF42 FF44 FF51 5H115 PA11 PC06 PI12 PI13 PO02 PU25 PV07 PV09 PV22 Q03 TI03 TU06
Claims (9)
残存量を演算する電流積算回路(4)と、電池(3)の定電流
状態における電圧をパラメーターとする残存量である電
圧−残存量関係を記憶する記憶回路(2)と、電池(3)の電
流を検出して、電池(3)の電流が定電流状態であると、
記憶回路(2)に記憶している電圧−残存量関係から補正
残存量を検出する残存量補正回路(5)とを備え、 電池(3)に流れる電流が所定の時間に定電流状態になる
と、残存量補正回路(5)が記憶回路(2)に記憶している電
圧−残存量関係から補正残存量を検出し、この補正残存
量で電流積算回路(4)が検出している残存量を補正する
電池の残存量演算回路。1. A current integrating circuit (4) for integrating a charge / discharge current flowing through a battery (3) to calculate a remaining amount, and a voltage which is a remaining amount using a voltage of the battery (3) in a constant current state as a parameter. A storage circuit (2) for storing the remaining amount relationship, and detecting the current of the battery (3), and when the current of the battery (3) is in a constant current state,
A residual amount correction circuit (5) for detecting a corrected residual amount from the voltage-remaining amount relationship stored in the storage circuit (2), and when a current flowing through the battery (3) becomes a constant current state for a predetermined time. The remaining amount correction circuit (5) detects a corrected remaining amount from the voltage-remaining amount relationship stored in the storage circuit (2), and the remaining amount detected by the current integrating circuit (4) based on the corrected remaining amount. Circuit for correcting the remaining amount of the battery.
する電池(3)に流れる充放電電流を積算して残存量を演
算する電流積算回路(4)と、イグニッションスイッチを
オンにしたときの電池(3)の最低電圧をパラメーターと
する残存量である電圧−残存量関係を記憶する記憶回路
(2)と、イグニッションスイッチがオンに切り換えられ
たときの最低電圧を検出して、記憶回路(2)に記憶して
いる電圧−残存量関係から補正残存量を検出する残存量
補正回路(5)とを備え、 イグニッションスイッチをオンにするときに、残存量補
正回路(5)が記憶回路(2)に記憶している電圧−残存量関
係から補正残存量を検出し、この補正残存量で電流積算
回路(4)が検出している残存量を補正する電池の残存量
演算回路。2. A current integrating circuit (4) for calculating a remaining amount by integrating a charge / discharge current flowing through a battery (3) for driving a motor (9) of a hybrid car, and a battery when an ignition switch is turned on. A storage circuit for storing the voltage-remaining amount relationship, which is the remaining amount using the minimum voltage of (3) as a parameter.
(2) a remaining amount correction circuit (5) which detects the lowest voltage when the ignition switch is turned on and detects the corrected remaining amount from the voltage-residual amount relationship stored in the storage circuit (2). When the ignition switch is turned on, the remaining amount correction circuit (5) detects the corrected remaining amount from the voltage-remaining amount relationship stored in the storage circuit (2), and determines the corrected remaining amount. A battery remaining amount calculation circuit for correcting the remaining amount detected by the current integrating circuit (4).
ブルまたは関数として記憶している請求項１または２に
記載される電池の残存量演算回路。3. The remaining battery operation circuit according to claim 1, wherein the storage circuit stores the relationship between the voltage and the remaining amount as a table or a function.
ング周期で電池電圧を検出し、連続して検出した電圧値
が設定範囲よりも小さくなる回数が設定回数よりも多く
なると定電流と判定して電池(3)の電圧を検出して補正
残存量を検出する請求項１に記載される電池の残存量演
算回路。4. A remaining amount correction circuit (5) detects a battery voltage at a predetermined sampling cycle, and when the number of times that the continuously detected voltage value becomes smaller than a set range becomes larger than the set number of times, the constant current and the constant current. 2. The circuit for calculating the remaining amount of a battery according to claim 1, wherein the determination is made and the voltage of the battery is detected to detect the corrected remaining amount.
エンジン(7)を始動するときの最低電圧を検出する請求
項２に記載される電池の残存量演算回路。5. The circuit for calculating a remaining amount of a battery according to claim 2, wherein the remaining amount correction circuit detects a minimum voltage when starting the engine as the starting voltage.
残存量を演算すると共に、電池(3)の定電流状態におけ
る電圧をパラメーターとする残存量である電圧−残存量
関係を記憶し、電池(3)の電流を検出して、電池(3)の電
流が定電流状態であるときに、記憶回路(2)に記憶して
いる電圧−残存量関係から補正残存量を検出して残存量
を補正する電池の残存量演算方法。6. A charge / discharge current flowing through the battery (3) is integrated to calculate a remaining amount, and a voltage-remaining amount relationship, which is a remaining amount using a voltage in a constant current state of the battery (3) as a parameter, is stored. Then, the current of the battery (3) is detected, and when the current of the battery (3) is in a constant current state, the corrected remaining amount is detected from the voltage-remaining amount relationship stored in the storage circuit (2). Battery remaining amount calculation method for correcting the remaining amount of the battery.
する電池(3)に流れる充放電電流を積算して残存量を演
算し、イグニッションスイッチをオンにしたときの電池
(3)の最低電圧をパラメーターとする残存量である電圧
−残存量関係を記憶し、イグニッションスイッチをオン
にするときの最低電圧を検出して、記憶回路(2)に記憶
している電圧−残存量関係から補正残存量を検出し、補
正残存量で残存量を補正する電池の残存量演算方法。7. The battery when the ignition switch is turned on by calculating the remaining amount by integrating the charge / discharge current flowing through the battery (3) for driving the motor (9) of the hybrid car.
The voltage-remaining amount relationship that is the remaining amount with the minimum voltage of (3) as a parameter is stored, the lowest voltage when the ignition switch is turned on is detected, and the voltage stored in the storage circuit (2) is stored. A method for calculating a remaining amount of a battery in which a corrected remaining amount is detected from a relationship between the remaining amounts and the remaining amount is corrected using the corrected remaining amount.
として記憶する請求項６または７に記載される電池の残
存量演算方法。8. The method according to claim 6, wherein the relationship between the voltage and the remaining amount is stored as a table or a function.
出し、連続して検出した電圧値が設定範囲よりも小さく
なる回数が設定回数よりも多くなると定電流と判定して
電池(3)の電圧を検出して補正残存量を検出する請求項
６に記載される電池の残存量演算方法。9. A battery voltage is detected at a predetermined sampling cycle, and when the number of times that the continuously detected voltage value becomes smaller than the set range becomes larger than the set number, it is determined that the battery voltage is constant current. 7. The method according to claim 6, wherein the correction remaining amount is detected by detecting the remaining amount.
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|---|---|---|---|
| JP2000366226A JP4030261B2 (en) | 2000-11-30 | 2000-11-30 | Battery remaining amount calculation circuit and remaining amount calculation method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000366226A JP4030261B2 (en) | 2000-11-30 | 2000-11-30 | Battery remaining amount calculation circuit and remaining amount calculation method |
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| JP4030261B2 JP4030261B2 (en) | 2008-01-09 |
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| WO2011013248A1 (en) * | 2009-07-31 | 2011-02-03 | 富士通株式会社 | Method for indicating remaining capacity, program for indicating remaining capacity, device for indicating remaining capacity, and electronic device |
| JP2012247374A (en) * | 2011-05-31 | 2012-12-13 | Primearth Ev Energy Co Ltd | Secondary battery controller |
| KR20150005073A (en) * | 2013-07-04 | 2015-01-14 | 에스케이이노베이션 주식회사 | Method and apparatus for estimating SOC in constant current state, battery management system and energy storage system comprising the same |
| JP2015195212A (en) * | 2011-01-05 | 2015-11-05 | エルジー・ケム・リミテッド | Apparatus and method for estimating available time of battery |
| KR20150127370A (en) * | 2014-05-07 | 2015-11-17 | 주식회사 엘지화학 | Apparatus and method for calculting state of charge of battery |
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| JP2000270402A (en) * | 1999-03-19 | 2000-09-29 | Mitsubishi Motors Corp | Residual capacity detector for battery |
| JP2001157366A (en) * | 1999-11-29 | 2001-06-08 | Sanyo Electric Co Ltd | Method of controlling charging and discharging of battery pack |
| JP2001281306A (en) * | 2000-03-28 | 2001-10-10 | Mitsubishi Electric Corp | Chargeable battery residual capacity detector |
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| US7688032B2 (en) | 2006-08-03 | 2010-03-30 | Nissan Motor Co., Ltd. | Battery remaining capacity detecting apparatus and battery remaining capacity detecting method |
| JP2010279219A (en) * | 2009-06-01 | 2010-12-09 | Nissan Motor Co Ltd | Method of controlling charge of lithium ion battery |
| WO2011013248A1 (en) * | 2009-07-31 | 2011-02-03 | 富士通株式会社 | Method for indicating remaining capacity, program for indicating remaining capacity, device for indicating remaining capacity, and electronic device |
| US9575131B2 (en) | 2009-07-31 | 2017-02-21 | Fujitsu Limited | Residual quantity display system |
| JP2015195212A (en) * | 2011-01-05 | 2015-11-05 | エルジー・ケム・リミテッド | Apparatus and method for estimating available time of battery |
| JP2012247374A (en) * | 2011-05-31 | 2012-12-13 | Primearth Ev Energy Co Ltd | Secondary battery controller |
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| KR102037378B1 (en) * | 2013-07-04 | 2019-10-28 | 에스케이이노베이션 주식회사 | Method and apparatus for estimating SOC in constant current state, battery management system and energy storage system comprising the same |
| KR20150127370A (en) * | 2014-05-07 | 2015-11-17 | 주식회사 엘지화학 | Apparatus and method for calculting state of charge of battery |
| KR101692104B1 (en) | 2014-05-07 | 2017-01-02 | 주식회사 엘지화학 | Apparatus and method for calculting state of charge of battery |
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