JP2001339868A - Control method for charge/discharge of battery - Google Patents
Control method for charge/discharge of batteryInfo
- Publication number
- JP2001339868A JP2001339868A JP2000159916A JP2000159916A JP2001339868A JP 2001339868 A JP2001339868 A JP 2001339868A JP 2000159916 A JP2000159916 A JP 2000159916A JP 2000159916 A JP2000159916 A JP 2000159916A JP 2001339868 A JP2001339868 A JP 2001339868A
- Authority
- JP
- Japan
- Prior art keywords
- battery
- charge
- temperature
- charged
- discharge
- 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.)
- Pending
Links
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
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は充放電している電池
の異常を正確に識別し、あるいは、充放電している電池
の残容量を正確に補正する電池の充放電制御方法に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery charge / discharge control method for accurately identifying abnormalities in a charged / discharged battery or for accurately correcting the remaining capacity of the charged / discharged battery.
【０００２】[0002]
【従来の技術】二次電池は、好ましい範囲で充放電し
て、長い期間にわたって、性能を低下させることなく有
効に使用できる性質がある。しかしながら、過充電さ
れ、あるいは過放電されると、電気的な性能が著しく低
下する。このため、使用環境が悪いと、電池の寿命は著
しく短くなってしまう。この弊害を少しでも有効に阻止
するために、充放電している二次電池は、電池電圧に加
えて、温度も検出している。検出した電圧と温度をパラ
メターとして充放電を制御すると、より理想に近い環境
で使用できる。電池は満充電されると、充電電流が充電
のために使用されなくなって、内部で熱に変換される。
このため、満充電されると電池温度が高くなる。また、
短絡電池や不活性電池等の異常電池も、充電電流が有効
に充電に使用されなくなって発熱して温度が上昇する。
このため、電池温度で異常電池を識別し、あるいは満充
電を検出することができる。たとえば、電池温度が６０
℃よりも高くなる電池を異常電池と判別し、あるいは、
電池が満充電されたと判定して、充放電電流を遮断し
て、電池を安全に使用できる。ただ、電池温度は外気温
度の影響を受けるので、電池温度が６０℃と同じであっ
ても、電池の状態は必ずしも同じとはならない。外気温
度が低いときに電池温度が低下するからである。2. Description of the Related Art A secondary battery has such a property that it can be charged and discharged within a preferable range and used effectively for a long period of time without deteriorating its performance. However, when overcharged or overdischarged, the electrical performance is significantly reduced. For this reason, if the operating environment is poor, the life of the battery is significantly shortened. In order to effectively prevent this adverse effect at all, the secondary battery being charged and discharged detects the temperature in addition to the battery voltage. If charging and discharging are controlled using the detected voltage and temperature as parameters, the device can be used in a more ideal environment. When the battery is fully charged, the charging current is no longer used for charging and is internally converted to heat.
Therefore, when fully charged, the battery temperature increases. Also,
Abnormal batteries, such as short-circuit batteries and inactive batteries, also have a rise in temperature due to heat generation due to the charging current not being used effectively for charging.
Therefore, an abnormal battery can be identified based on the battery temperature, or full charge can be detected. For example, if the battery temperature is 60
Battery that is higher than ℃ is judged as abnormal battery, or
It is determined that the battery is fully charged, the charge / discharge current is cut off, and the battery can be used safely. However, since the battery temperature is affected by the outside air temperature, the state of the battery is not always the same even if the battery temperature is the same as 60 ° C. This is because the battery temperature decreases when the outside air temperature is low.
【０００３】このため、電池温度で異常な電池を識別
し、あるいは充放電を制御する方法は、外気温度によっ
ては、理想的な状態で充放電を制御できなくなる。この
弊害を解消するために、電池の温度の時間に対する変化
率、すなわち、δＴ／δｔを検出して、電池の充放電を
制御する方法が開発されている（特開平８−１４０２８
２号公報）。この公報に記載されるように、δＴ／δｔ
をパラメターとして、制御する方法は、外気温度の影響
が少なく、より理想に近い状態で充放電できる。For this reason, the method of identifying an abnormal battery based on the battery temperature or controlling the charge / discharge cannot control the charge / discharge in an ideal state depending on the outside air temperature. To solve this problem, a method has been developed in which the rate of change of the battery temperature with respect to time, that is, δT / δt, is detected to control the charge and discharge of the battery (Japanese Patent Laid-Open No. 8-14028).
No. 2). As described in this publication, δT / δt
Is controlled by using as a parameter, the influence of the outside air temperature is small, and charge and discharge can be performed in a more ideal state.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、この方
法も、つねに理想的な環境では電池を充放電できない。
とくに、自動車に搭載される電池のように、充放電され
る電流が大幅に変動する用途において、δＴ／δｔの変
化では電池を理想に近い環境で充放電できない。自動車
に搭載される電池は、自動車の走行状態で充放電電流が
大きく変化せざるを得ない。たとえば、急ブレーキで回
生制動するとき、電池は大電流で充電される。さらに、
急勾配の長い坂道を回生制動してブレーキをかけながら
下るとき、電池は大電流で長い時間充電される。この状
態で、回生制動によるブレーキ力は、電池の充電電流に
比例する。ブレーキ力は自動車を走行させるのに理想的
な状態に制御する必要があるので、ブレーキ力が決定さ
れると電池の充電電流が特定される。したがって、この
状態では、充電電流を大小に制御することはできない。
さらに、自動車を急加速するときも、電池に大電流が流
れる。電池の出力を増加して、モーターの駆動力を強く
するからである。このように、充放電の電流が電池の使
用環境で特定されるとき、δＴ／δｔを検出しても、電
池の満充電や異常を正確に識別できなくなってしまう。
充電電流が大きくなると、満充電や電池異常のみでな
く、δＴ／δｔも大きくなるからである。したがって、
電池のδＴ／δｔが設定値よりも大きくなっても、必ず
しも満充電され、あるいは異常な電池とは限らない。However, this method cannot always charge and discharge the battery in an ideal environment.
In particular, in an application such as a battery mounted on an automobile, in which the charged / discharged current varies greatly, the change in δT / δt makes it impossible to charge / discharge the battery in an environment near ideal. A battery mounted on an automobile has a large change in charge / discharge current depending on the running state of the automobile. For example, when regenerative braking is performed by sudden braking, the battery is charged with a large current. further,
When regeneratively braking down a steep hill, the battery is charged for a long time with a large current. In this state, the braking force by the regenerative braking is proportional to the charging current of the battery. Since the braking force needs to be controlled to an ideal state for driving the vehicle, when the braking force is determined, the charging current of the battery is specified. Therefore, in this state, the charging current cannot be controlled to be large or small.
Further, a large current flows through the battery even when the vehicle is suddenly accelerated. This is because the output of the battery is increased to increase the driving force of the motor. As described above, when the charge / discharge current is specified in the usage environment of the battery, even if δT / δt is detected, it becomes impossible to accurately identify the full charge or abnormality of the battery.
This is because when the charging current increases, not only full charge and battery abnormality, but also δT / δt increases. Therefore,
Even if δT / δt of the battery becomes larger than the set value, the battery is not always fully charged or abnormal.
【０００５】本発明は、さらにこの欠点を解決して、電
池をより理想に近い状態で充放電することを目的に開発
されたもので、本発明の重要な目的は、充放電される電
池の電流と時間の積である電気量に対する温度変化を検
出して満充電や異常電池を識別することにより、電池を
より理想的な環境で充放電できる電池の充放電方法を提
供することにある。The present invention has been developed with the object of further solving the above drawbacks and charging and discharging the battery in a more ideal state. An important object of the present invention is to provide a battery for charging and discharging. An object of the present invention is to provide a battery charging / discharging method capable of charging / discharging a battery in a more ideal environment by detecting a temperature change with respect to a quantity of electricity which is a product of current and time and identifying a fully charged or abnormal battery.
【０００６】[0006]
【課題を解決するための手段】本発明の請求項１の充放
電制御方法は、充放電している二次電池の電荷に対する
温度の変化であるδＴ／δｑを検出し、δＴ／δｑが設
定値よりも大きい電池を異常電池と識別する。According to a first aspect of the present invention, there is provided a charge / discharge control method comprising detecting a temperature change δT / δq with respect to a charge of a secondary battery being charged and discharged, and setting δT / δq. Batteries larger than the value are identified as abnormal batteries.
【０００７】本発明の請求項２の充放電制御方法は、充
電している二次電池の電荷に対する温度の変化であるδ
Ｔ／δｑを検出し、δＴ／δｑが設定値よりも大きいと
満充電と識別する。The charge / discharge control method according to the second aspect of the present invention is a method of controlling the temperature of the secondary battery which is being charged with respect to the change in temperature.
T / δq is detected, and if δT / δq is larger than the set value, it is determined that the battery is fully charged.
【０００８】本発明の請求項３の充放電制御方法は、充
放電している二次電池の電荷に対する温度の変化である
δＴ／δｑと電池電圧を検出し、δＴ／δｑが設定値よ
りも大きく、かつ電池電圧が設定電圧よりも高いとき
に、電池の残容量を満充電状態に補正する。According to a third aspect of the present invention, a charge / discharge control method detects a temperature change δT / δq and a battery voltage with respect to the charge of a charged / discharged secondary battery, and δT / δq is smaller than a set value. When it is large and the battery voltage is higher than the set voltage, the remaining capacity of the battery is corrected to a fully charged state.
【０００９】本発明の請求項４の充放電制御方法は、充
放電している二次電池の電荷に対する温度の変化である
δＴ／δｑと電池電圧を検出し、δＴ／δｑが設定値よ
りも大きく、かつ電池電圧が設定電圧よりも低いとき
に、残容量を完全放電容量に補正する。The charge / discharge control method according to a fourth aspect of the present invention detects δT / δq, which is a change in temperature with respect to the charge of the secondary battery being charged and discharged, and the battery voltage, and δT / δq is smaller than a set value. When the voltage is large and the battery voltage is lower than the set voltage, the remaining capacity is corrected to the complete discharge capacity.
【００１０】[0010]
【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方法を例示するものであ
って、本発明は充放電の制御方法を以下の方法に特定し
ない。Embodiments of the present invention will be described below with reference to the drawings. However, the embodiments described below exemplify a method for embodying the technical idea of the present invention, and the present invention does not specify a charge / discharge control method to the following method.
【００１１】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 easier 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.
【００１２】図１は、本発明の電池の充放電制御方法に
使用する回路図である。この図は、ハイブリッドカーや
電気自動車に搭載されて自動車を走行させる走行制御回
路のブロック図である。ハイブリッドカーは、エンジン
で発電機を駆動して電池群を充電する機構を搭載してい
る。電気自動車は、エンジンを搭載しないので、回生制
動するときにのみモーターや発電機で発電して電池群を
充電する。FIG. 1 is a circuit diagram used in the battery charge / discharge control method of the present invention. FIG. 1 is a block diagram of a travel control circuit mounted on a hybrid car or an electric car to run the car. Hybrid cars are equipped with a mechanism that drives a generator with an engine to charge a battery group. Since electric vehicles do not have an engine, they only generate power using a motor or a generator to charge a battery group during regenerative braking.
【００１３】この図に示す走行制御回路は、自動車を走
行させるモーター２に電力を供給する電池群１と、この
電池群１とモーター２との間に接続されて、電池群１の
充放電を制御する充放電制御回路４と、この充放電制御
回路４を制御するメインコントローラー５と、電池群１
を構成している電池の電圧と温度を検出してメインコン
トローラー５に電池情報信号を出力する電池コントロー
ラー６と、電池群１の充放電電流を検出する電流検出回
路７と、電流検出回路７の出力信号を積算して、充放電
する電気量を算出して電気量の信号を電池コントローラ
ー６に出力する電気量演算回路８と、電池コントローラ
ー６に接続されて、電池コントローラー６で演算された
電池群１の残容量を表示する残容量表示回路９とを備え
ている。A traveling control circuit shown in FIG. 1 is connected to a battery group 1 for supplying electric power to a motor 2 for driving an automobile, and is connected between the battery group 1 and the motor 2 to charge and discharge the battery group 1. A charge / discharge control circuit 4 for controlling the power supply; a main controller 5 for controlling the charge / discharge control circuit 4;
The battery controller 6 detects the voltage and temperature of the battery constituting the battery controller 6 and outputs a battery information signal to the main controller 5; the current detection circuit 7 detects the charge / discharge current of the battery group 1; An electric quantity calculation circuit 8 that integrates the output signal to calculate the quantity of electricity to be charged and discharged and outputs a signal of the quantity of electricity to the battery controller 6; and a battery connected to the battery controller 6 and operated by the battery controller 6. A remaining capacity display circuit 9 for displaying the remaining capacity of the group 1 is provided.
【００１４】電池群１は、直列または並列に接続してい
る複数のモジュール電池１０を備える。モジュール電池
１０は、複数の二次電池を直列または並列に接続してい
る。二次電池は、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充電できる電
池である。The battery group 1 includes a plurality of module batteries 10 connected in series or in parallel. The module battery 10 has a plurality of secondary batteries connected in series or in parallel. The secondary battery is a rechargeable battery such as a nickel-hydrogen battery, a nickel-cadmium battery, and a lithium ion secondary battery.
【００１５】モジュール電池１０は、電池温度を検出す
る温度センサー１１を電池の表面に固定している。温度
センサー１１は電池コントローラー６に電池の温度信号
を出力する。電池コントローラー６は、温度センサー１
１から入力される信号から、電池が満充電されたかどう
かを判別し、さらに、電池が異常な状態になったかどう
かを識別する。温度センサー１１は、モジュール電池１
０を構成している全ての電池の表面に固定されて、各々
の電池温度を独立して検出することができる。このモジ
ュール電池１０を備える電池群１は、全ての電池の満充
電と異常電池とを識別できる。モジュール電池１０を構
成している全ての電池表面に固定している複数の温度セ
ンサー１１は、全てを直列に接続することができる。こ
の電池群１は、モジュール電池１０の単位で満充電と異
常電池を特定できる。The module battery 10 has a temperature sensor 11 for detecting the battery temperature fixed to the surface of the battery. The temperature sensor 11 outputs a battery temperature signal to the battery controller 6. The battery controller 6 includes the temperature sensor 1
It is determined from the signal input from 1 whether or not the battery is fully charged, and further, whether or not the battery has become abnormal. The temperature sensor 11 is a module battery 1
0 is fixed to the surface of all the batteries constituting 0, and each battery temperature can be detected independently. The battery group 1 including the module batteries 10 can distinguish between a fully charged battery and an abnormal battery. All of the plurality of temperature sensors 11 fixed to the surfaces of all the batteries constituting the module battery 10 can be connected in series. The battery group 1 can specify a fully charged battery and an abnormal battery in units of the module battery 10.
【００１６】温度センサー１１は、温度で電気抵抗が変
化する素子であるＰＴＣ、サーミスタ、バリスタ等が使
用できる。ＰＴＣは、電池温度が設定温度よりも高くな
ると電気抵抗が急激に増加するので、電池の温度が設定
温度になる温度領域において、温度変化を正確に検出で
きる。ＰＴＣは、複数を直列に接続する回路構成におい
ても、いずれかひとつの電池の温度変化を正確に検出で
きる。いずれかのＰＴＣが設定温度まで加熱されると、
そのＰＴＣの電気抵抗が急激に増加し、直列に接続して
いる全てのＰＴＣの電気抵抗を増加するからである。温
度センサーに使用できるサーミスタやバリスタは、全て
の温度範囲において、リニアに近い状態で電気抵抗が変
化する。したがって、これ等の温度センサーを使用する
と、広い温度範囲において、電池の温度変化を正確に検
出できる。As the temperature sensor 11, a PTC, a thermistor, a varistor, or the like, which is an element whose electric resistance changes with temperature, can be used. In the PTC, when the battery temperature becomes higher than the set temperature, the electric resistance sharply increases, so that the temperature change can be accurately detected in a temperature range where the battery temperature becomes the set temperature. The PTC can accurately detect a temperature change of any one battery even in a circuit configuration in which a plurality of batteries are connected in series. When any PTC is heated to the set temperature,
This is because the electric resistance of the PTC rapidly increases, and the electric resistance of all the PTCs connected in series increases. The thermistors and varistors that can be used for temperature sensors change their electrical resistance in a nearly linear state over the entire temperature range. Therefore, when these temperature sensors are used, a temperature change of the battery can be accurately detected in a wide temperature range.
【００１７】電池群１は、ひとつのモジュール電池１０
にひとつの温度センサー１１を設けて、モジュール電池
１０の単位で温度を検出することができる。また、モジ
ュール電池を構成している代表的な電池表面にのみ温度
センサーを固定することもできる。さらに、複数のモジ
ュール電池を備える電池群は、いずれかひとつ、または
特定のモジュール電池にのみ温度センサーを設けて、い
ずれかのモジュール電池の温度を電池群の温度として検
出することもできる。モジュール電池１０の単位で温度
センサー１１を設けている電池群１は、異常な状態にな
ったモジュール電池１０を特定でき、また満充電された
モジュール電池１０を特定できる。さらに、特定の電池
の表面にのみ温度センサーを固定している電池群は、温
度センサーを固定している電池の異常と満充電を特定で
きる。複数のモジュール電池を直列に接続している電池
群は、ひとつの温度センサーで、電池群の満充電と、異
常な状態になったかどうかを識別できる。The battery group 1 includes one module battery 10
Is provided with one temperature sensor 11 so that the temperature can be detected in units of the module battery 10. Further, the temperature sensor can be fixed only on a representative surface of the battery constituting the module battery. Further, in a battery group including a plurality of module batteries, a temperature sensor may be provided for only one or a specific module battery, and the temperature of any of the module batteries may be detected as the temperature of the battery group. The battery group 1 in which the temperature sensors 11 are provided in units of the module batteries 10 can specify the module battery 10 in an abnormal state and can specify the fully charged module battery 10. Further, a battery group in which a temperature sensor is fixed only on the surface of a specific battery can specify abnormality and full charge of the battery in which the temperature sensor is fixed. A battery group in which a plurality of module batteries are connected in series can be identified by a single temperature sensor as to whether the battery group is fully charged and whether an abnormal state has occurred.
【００１８】充放電制御回路４は、電池群１の充電電流
と充放電を制御する。充放電制御回路４は、メインコン
トローラー５に制御されて、電池群１を充放電する電流
を制御する。充放電制御回路４が電池群１の放電電流を
大きくすると、モーター２の出力が大きくなり、自動車
を走行させる馬力が増加する。自動車が回生制動すると
き、充放電制御回路４はモーター２を発電機とし、ある
いは、モーター２と別に設けられた発電機３が電池群１
が充電する電流を制御する。充電電流を大きくすると自
動車の制動力が大きくなる。発電機３の回転トルクが充
電電流に比例して大きくなるからである。The charge / discharge control circuit 4 controls the charge current and charge / discharge of the battery group 1. The charge / discharge control circuit 4 is controlled by the main controller 5 to control a current for charging / discharging the battery group 1. When the charge / discharge control circuit 4 increases the discharge current of the battery group 1, the output of the motor 2 increases, and the horsepower for running the automobile increases. When the vehicle performs regenerative braking, the charge / discharge control circuit 4 uses the motor 2 as a generator, or the generator 3 provided separately from the motor 2 uses the battery group 1
Controls the current that it charges. Increasing the charging current increases the braking force of the vehicle. This is because the rotation torque of the generator 3 increases in proportion to the charging current.
【００１９】メインコントローラー５は、アクセル１２
の開度と、ブレーキ１３を踏む力と、電池群１の残容量
から充放電制御回路４を制御して、電池群１の充放電電
流を制御する。アクセル開度が大きくなると、電池群１
の放電電流を増加させる。ブレーキ１３の踏み力が強く
なると、充電電流を増加させる。ただ、メインコントロ
ーラー５は、電池群１の残容量が設定された範囲となる
ように、充放電制御回路４を制御する。ハイブリッドカ
ーはエンジンで回転される発電機を搭載しているので、
電池群の残容量が設定値よりも少なくなると、エンジン
で発電機を駆動して電池群を充電する。メインコントロ
ーラー５は、電池コントローラー６から残容量が設定値
よりも少なくなったことを示す信号が入力されると、充
放電制御回路４を制御して電池群１を充電する。The main controller 5 includes an accelerator 12
The charging / discharging current of the battery group 1 is controlled by controlling the charge / discharge control circuit 4 based on the opening degree of the vehicle, the stepping force on the brake 13 and the remaining capacity of the battery group 1. When the accelerator opening increases, the battery group 1
Increase the discharge current. When the stepping force of the brake 13 increases, the charging current increases. However, the main controller 5 controls the charge / discharge control circuit 4 so that the remaining capacity of the battery group 1 falls within the set range. Hybrid cars are equipped with a generator that is powered by an engine,
When the remaining capacity of the battery group becomes smaller than the set value, the generator is driven by the engine to charge the battery group. When a signal indicating that the remaining capacity is smaller than the set value is input from the battery controller 6, the main controller 5 controls the charge / discharge control circuit 4 to charge the battery group 1.
【００２０】電気量演算回路８は、電池群１を充放電さ
せる電流を時間で積分して電気量（ｑ）を演算する。充
電するときに電池群１に入力される電気量は、充電電流
と時間の積で計算され、放電される電池群１から出力さ
れる電気量は、放電電流と時間の積で計算される。電池
群１の充電電流と放電電流は時間とともに変化する。し
たがって、電池群１に入力される電気量と、電池群１か
ら出力される電気量は、電池群１に流れる電流を時間で
積分して算出できる。電気量演算回路８は、演算した電
気量を電池コントローラー６に出力する。The electric quantity calculation circuit 8 calculates the electric quantity (q) by integrating the current for charging and discharging the battery group 1 with time. The amount of electricity input to the battery group 1 when charging is calculated by the product of the charging current and time, and the amount of electricity output from the battery group 1 to be discharged is calculated by the product of the discharge current and time. The charging current and the discharging current of the battery group 1 change with time. Therefore, the amount of electricity input to the battery group 1 and the amount of electricity output from the battery group 1 can be calculated by integrating the current flowing through the battery group 1 with time. The electricity quantity calculation circuit 8 outputs the calculated electricity quantity to the battery controller 6.
【００２１】電池コントローラー６は、電気量演算回路
８から入力される電池群１の電気量ｑと、温度センサー
１１から入力される温度を演算して、電気量に対する温
度の変化率、すなわちδＴ／δｑを演算する。電池が、
残容量を２０〜８０％とする範囲で充放電されるとき、
電池の内部で発熱する熱量は、電池の内部抵抗と電気量
の積に比例する。電池の内部発熱は、電池の温度を上昇
させる。このため、電池の温度上昇は、発熱量をパラメ
ターとして特定される。電池を充放電する電気量が発熱
量を特定し、さらに、発熱量が電池の温度上昇を決定す
るので、電気量が電池の温度上昇を特定することにな
る。正常な電池は、電気量に対する電池の温度上昇、す
なわち、δＴ／δｑが所定の範囲となる。電池が過充電
領域や過放電領域になると、ガス吸収やガス発生に起因
する異常な発熱で温度が急激に上昇し、あるいは、内部
短絡や不活性電池による異常な発熱等でも温度が上昇す
る。この状態になると、内部抵抗に起因する発熱に、異
常な発熱が加算され、電池の温度上昇が高くなるので、
充放電する電気量が同じであっても、電池の温度上昇が
大きくなる。したがって、電池コントローラー６は、電
気量に対する温度の変化率、すなわち、δＴ／δｑを設
定値に比較して、異常電池を識別できる。また、電池が
満充電されてもδＴ／δｑが大きくなるので、δＴ／δ
ｑで満充電も識別できる。The battery controller 6 calculates the electric quantity q of the battery group 1 inputted from the electric quantity computing circuit 8 and the temperature inputted from the temperature sensor 11 to obtain a rate of change of the temperature with respect to the electric quantity, that is, δT / δq is calculated. Battery is
When charging / discharging in the range where the remaining capacity is 20 to 80%,
The amount of heat generated inside the battery is proportional to the product of the internal resistance of the battery and the amount of electricity. The internal heat of the battery raises the temperature of the battery. For this reason, the temperature rise of the battery is specified by using the calorific value as a parameter. Since the amount of electricity that charges and discharges the battery specifies the amount of heat generated, and the amount of heat generated determines the temperature rise of the battery, the amount of electricity specifies the temperature rise of the battery. In a normal battery, the temperature rise of the battery with respect to the amount of electricity, that is, δT / δq falls within a predetermined range. When the battery enters the overcharge region or the overdischarge region, the temperature rises rapidly due to abnormal heat generation due to gas absorption or gas generation, or the temperature rises due to an internal short circuit or abnormal heat generation due to an inert battery. In this state, abnormal heat generation is added to the heat generated by the internal resistance, and the temperature rise of the battery increases.
Even if the amount of electricity charged and discharged is the same, the temperature rise of the battery increases. Therefore, the battery controller 6 can identify the abnormal battery by comparing the rate of change of the temperature with respect to the amount of electricity, that is, δT / δq, with the set value. Also, since δT / δq increases even when the battery is fully charged, δT / δ
Full charge can be identified by q.
【００２２】電池は満充電されると電池電圧も高くな
る。したがって、電池電圧を設定電圧に比較して、電池
電圧が設定電圧よりも高く、かつ、δＴ／δｑが設定値
よりも高いことを検出して、電池を満充電と判定して、
充放電させる電流値を積算して演算した残容量を、満充
電と補正することができる。さらに、電池は残容量が少
なくなって完全に放電される状態で放電してもδＴ／δ
ｑが大きくなる。電池の内部で発生するガスに起因する
発熱が増加するからである。したがって、電池電圧を設
定電圧に比較して、電池電圧が設定電圧よりも低く、か
つ、δＴ／δｑが設定値よりも大きくなるときには、電
池が完全に放電された状態と判定して、演算した残容量
を補正することができる。When the battery is fully charged, the battery voltage increases. Therefore, comparing the battery voltage with the set voltage, detecting that the battery voltage is higher than the set voltage and that δT / δq is higher than the set value, determining that the battery is fully charged,
The remaining capacity calculated by integrating current values to be charged and discharged can be corrected to full charge. Furthermore, even when the battery is discharged in a state where the remaining capacity is low and the battery is completely discharged, δT / δ
q increases. This is because heat generated due to gas generated inside the battery increases. Therefore, when the battery voltage is compared with the set voltage and the battery voltage is lower than the set voltage and δT / δq becomes larger than the set value, it is determined that the battery is completely discharged, and the calculation is performed. The remaining capacity can be corrected.
【００２３】図の走行制御回路は、電池コントローラー
６に、複数の温度センサー１１を接続している。各々の
温度センサー１１は、各々のモジュール電池１０に設け
たものである。この電池コントローラー６は、各々の温
度センサー１１から入力される信号と、電気量演算回路
８から入力される電気量の信号から、各々の温度センサ
ー１１に対するδＴ／δｑ、いいかえると、各々のモジ
ュール電池１０のδＴ／δｑを演算する。したがって、
この走行制御回路は、モジュール電池１０の単位で、異
常電池や満充電を識別できる。さらに、図示しないが、
全ての電池に別々に固定している各々の温度センサーか
ら独立して電池の温度信号を電池コントローラーに入力
し、電池コントローラーが各々の電池温度に対するδＴ
／δｑを演算する方式は、個々の電池単位で異常電池と
満充電とを判別できる。In the illustrated traveling control circuit, a plurality of temperature sensors 11 are connected to the battery controller 6. Each temperature sensor 11 is provided for each module battery 10. The battery controller 6 calculates δT / δq for each temperature sensor 11 from a signal input from each temperature sensor 11 and a signal of an electric quantity input from the electric quantity calculation circuit 8, in other words, each module battery. ΔT / δq of 10 is calculated. Therefore,
This traveling control circuit can identify an abnormal battery or a full charge in units of the module battery 10. Further, although not shown,
A battery temperature signal is input to the battery controller independently of each temperature sensor separately fixed to all batteries, and the battery controller determines δT for each battery temperature.
In the method of calculating / δq, an abnormal battery and a full charge can be determined for each individual battery.
【００２４】[0024]
【発明の効果】本発明の電池の充放電方法は、電池をよ
り理想的な環境で充放電できる特長がある。それは、本
発明の電池の充放電制御方法が、充放電される二次電池
の電荷に対する温度変化を検出して、異常電池や満充電
を識別しているからである。本発明の充放電制御方法
は、従来のように、時間に対する電池温度の変化率であ
るδＴ／δｔをパラメターとするのではなく、充放電さ
れる二次電池の電荷に対する温度変化であるδＴ／δｑ
をパラメターとして異常電池や満充電を識別している。
とくに、本発明の請求項１の充放電制御方法は、充放電
している二次電池のδＴ／δｑが設定値よりも大きいと
きに、電池を異常電池と識別し、本発明の請求項２の充
放電制御方法は、充電している二次電池のδＴ／δｑを
検出して、δＴ／δｑが設定値よりも大きいときに満充
電と識別している。したがって、本発明の充電制御方法
は、充放電の電流の大小に影響を受けることなく、充放
電の電流が特定される環境においても、電池異常や満充
電を確実に識別できる特長が実現できる。The method for charging and discharging a battery according to the present invention has a feature that the battery can be charged and discharged in a more ideal environment. This is because the battery charge / discharge control method of the present invention detects a temperature change with respect to the charge of the secondary battery to be charged / discharged and identifies an abnormal battery or a full charge. According to the charge / discharge control method of the present invention, the rate of change of battery temperature with respect to time, δT / δt, is not used as a parameter. δq
Is used to identify an abnormal battery or a fully charged battery.
In particular, according to the charge / discharge control method of claim 1 of the present invention, when δT / δq of a charged / discharged secondary battery is larger than a set value, the battery is identified as an abnormal battery, and The charging / discharging control method of (1) detects δT / δq of the secondary battery being charged, and determines that the secondary battery is fully charged when δT / δq is larger than a set value. Therefore, the charge control method of the present invention can realize a feature that a battery abnormality or a full charge can be reliably identified even in an environment where the charge / discharge current is specified without being affected by the magnitude of the charge / discharge current.
【００２５】さらに、本発明の請求項３の充放電制御方
法は、充放電している二次電池のδＴ／δｑと電池電圧
を検出して、δＴ／δｑが設定値よりも大きく、かつ電
池電圧が設定電圧よりも高いときに、残容量を満充電状
態に補正しており、また、本発明の請求項４の充放電制
御方法は、δＴ／δｑが設定値よりも大きく、かつ電池
電圧が設定電圧よりも低いときに、残容量を完全放電容
量に補正している。したがって、これらの充放電制御方
法は、電池の残容量をより正確に補正できる特長があ
る。Further, in the charging / discharging control method according to a third aspect of the present invention, the δT / δq and the battery voltage of the charging / discharging secondary battery are detected, the δT / δq is larger than the set value, and When the voltage is higher than the set voltage, the remaining capacity is corrected to a fully charged state, and the charge / discharge control method according to claim 4 of the present invention provides a charge / discharge control method wherein δT / δq is larger than a set value, Is lower than the set voltage, the remaining capacity is corrected to the complete discharge capacity. Therefore, these charge / discharge control methods have a feature that the remaining capacity of the battery can be corrected more accurately.
【図１】本発明の実施例の電池の充放電制御方法に使用
する回路のブロック図FIG. 1 is a block diagram of a circuit used for a battery charge / discharge control method according to an embodiment of the present invention.
１…電池群 ２…モーター ３…発電機 ４…充放電制御回路 ５…メインコントローラー ６…電池コントローラー ７…電流検出回路 ８…電気量演算回路 ９…残容量表示回路 １０…モジュール電池 １１…温度センサー １２…アクセル １３…ブレーキ DESCRIPTION OF SYMBOLS 1 ... Battery group 2 ... Motor 3 ... Generator 4 ... Charge / discharge control circuit 5 ... Main controller 6 ... Battery controller 7 ... Current detection circuit 8 ... Electric quantity calculation circuit 9 ... Remaining capacity display circuit 10 ... Module battery 11 ... Temperature sensor 12 ... Accelerator 13 ... Brake
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｈ０２Ｊ 7/10 Ｈ０２Ｊ 7/10 Ｌ ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) H02J 7/10 H02J 7/10 L
Claims (4)
る温度の変化であるδＴ／δｑを検出し、δＴ／δｑが
設定値よりも大きい電池を異常電池と識別する電池の充
放電制御方法。1. A charge / discharge control for a battery which detects a temperature change δT / δq with respect to charge of a charged / discharged secondary battery and identifies a battery in which δT / δq is larger than a set value as an abnormal battery. Method.
温度の変化であるδＴ／δｑを検出し、δＴ／δｑが設
定値よりも大きいと満充電と識別する電池の充放電制御
方法。2. A charge / discharge control method for a battery, which detects a change in temperature of a charged secondary battery with respect to electric charge, that is, δT / δq, and discriminates a full charge when δT / δq is larger than a set value.
る温度の変化であるδＴ／δｑと電池電圧を検出し、δ
Ｔ／δｑが設定値よりも大きく、かつ電池電圧が設定電
圧よりも高いときに、電池の残容量を満充電状態に補正
する電池の充放電制御方法。3. Detecting δT / δq, which is a change in temperature with respect to electric charge, of the charged and discharged secondary battery and the battery voltage,
A battery charge / discharge control method for correcting the remaining capacity of a battery to a fully charged state when T / δq is larger than a set value and the battery voltage is higher than the set voltage.
る温度の変化であるδＴ／δｑと電池電圧を検出し、δ
Ｔ／δｑが設定値よりも大きく、かつ電池電圧が設定電
圧よりも低いときに、電池の残容量を完全放電容量に補
正する電池の充放電制御方法。4. Detecting δT / δq, which is a change in temperature with respect to electric charge, of a charged and discharged secondary battery and a battery voltage,
A battery charge / discharge control method for correcting the remaining capacity of a battery to a complete discharge capacity when T / δq is larger than a set value and the battery voltage is lower than the set voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000159916A JP2001339868A (en) | 2000-05-30 | 2000-05-30 | Control method for charge/discharge of battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000159916A JP2001339868A (en) | 2000-05-30 | 2000-05-30 | Control method for charge/discharge of battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001339868A true JP2001339868A (en) | 2001-12-07 |
Family
ID=18664184
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000159916A Pending JP2001339868A (en) | 2000-05-30 | 2000-05-30 | Control method for charge/discharge of battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001339868A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006170867A (en) * | 2004-12-16 | 2006-06-29 | Sanyo Electric Co Ltd | Calculation method of remaining capacity of battery |
| WO2009013899A1 (en) * | 2007-07-26 | 2009-01-29 | Panasonic Corporation | Cell internal shortcircuit detection device, method, battery pack, and electronic device system |
| JP2010231968A (en) * | 2009-03-26 | 2010-10-14 | Toyota Central R&D Labs Inc | Control device for secondary battery |
| JP2011229363A (en) * | 2010-11-24 | 2011-11-10 | Kanehito Kanamori | Powerful motor |
| JP2012034425A (en) * | 2010-07-28 | 2012-02-16 | Panasonic Corp | Charging/discharging control circuit of secondary battery, battery pack, and battery power supply system |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03131780A (en) * | 1989-10-17 | 1991-06-05 | Fujikura Ltd | Storage battery built-in equipment package and deterioration deciding method for storage battery |
| JPH076789A (en) * | 1993-06-18 | 1995-01-10 | Pfu Ltd | Method and device for detecting charge of secondary battery |
| JPH0727256U (en) * | 1993-10-12 | 1995-05-19 | 株式会社東芝 | Full charge detection circuit |
| JPH08140280A (en) * | 1994-11-08 | 1996-05-31 | Matsushita Electric Ind Co Ltd | Device for controlling charging of storage battery |
| JPH08205420A (en) * | 1995-01-30 | 1996-08-09 | Toshiba Battery Co Ltd | Charger for secondary cell |
| JPH09139236A (en) * | 1995-11-15 | 1997-05-27 | Nippon Hoso Kyokai <Nhk> | Display device for battery residual capacity and remaining time |
| WO1997027495A1 (en) * | 1996-01-26 | 1997-07-31 | Yamaha Hatsudoki Kabushiki Kaisha | Method and device for monitoring deterioration of battery |
| JPH1051967A (en) * | 1996-07-31 | 1998-02-20 | Shin Kobe Electric Mach Co Ltd | Method and device for charging secondary battery |
| JPH10334951A (en) * | 1997-05-30 | 1998-12-18 | Toyota Motor Corp | Lithium ion secondary battery |
| JP2000069688A (en) * | 1998-08-24 | 2000-03-03 | Denso Corp | Battery charging device |
| JP2001218385A (en) * | 2000-02-03 | 2001-08-10 | Shindengen Electric Mfg Co Ltd | Charger for secondary battery |
-
2000
- 2000-05-30 JP JP2000159916A patent/JP2001339868A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03131780A (en) * | 1989-10-17 | 1991-06-05 | Fujikura Ltd | Storage battery built-in equipment package and deterioration deciding method for storage battery |
| JPH076789A (en) * | 1993-06-18 | 1995-01-10 | Pfu Ltd | Method and device for detecting charge of secondary battery |
| JPH0727256U (en) * | 1993-10-12 | 1995-05-19 | 株式会社東芝 | Full charge detection circuit |
| JPH08140280A (en) * | 1994-11-08 | 1996-05-31 | Matsushita Electric Ind Co Ltd | Device for controlling charging of storage battery |
| JPH08205420A (en) * | 1995-01-30 | 1996-08-09 | Toshiba Battery Co Ltd | Charger for secondary cell |
| JPH09139236A (en) * | 1995-11-15 | 1997-05-27 | Nippon Hoso Kyokai <Nhk> | Display device for battery residual capacity and remaining time |
| WO1997027495A1 (en) * | 1996-01-26 | 1997-07-31 | Yamaha Hatsudoki Kabushiki Kaisha | Method and device for monitoring deterioration of battery |
| JPH1051967A (en) * | 1996-07-31 | 1998-02-20 | Shin Kobe Electric Mach Co Ltd | Method and device for charging secondary battery |
| JPH10334951A (en) * | 1997-05-30 | 1998-12-18 | Toyota Motor Corp | Lithium ion secondary battery |
| JP2000069688A (en) * | 1998-08-24 | 2000-03-03 | Denso Corp | Battery charging device |
| JP2001218385A (en) * | 2000-02-03 | 2001-08-10 | Shindengen Electric Mfg Co Ltd | Charger for secondary battery |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006170867A (en) * | 2004-12-16 | 2006-06-29 | Sanyo Electric Co Ltd | Calculation method of remaining capacity of battery |
| WO2009013899A1 (en) * | 2007-07-26 | 2009-01-29 | Panasonic Corporation | Cell internal shortcircuit detection device, method, battery pack, and electronic device system |
| JP2010231968A (en) * | 2009-03-26 | 2010-10-14 | Toyota Central R&D Labs Inc | Control device for secondary battery |
| JP2012034425A (en) * | 2010-07-28 | 2012-02-16 | Panasonic Corp | Charging/discharging control circuit of secondary battery, battery pack, and battery power supply system |
| JP2011229363A (en) * | 2010-11-24 | 2011-11-10 | Kanehito Kanamori | Powerful motor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7768235B2 (en) | Battery management system and method for automotive vehicle | |
| JP4116609B2 (en) | Power supply control device, electric vehicle and battery control unit | |
| JP5618609B2 (en) | Battery control device | |
| US8669741B2 (en) | Battery management system and driving method thereof | |
| US7652449B2 (en) | Battery management system and driving method thereof | |
| US6759832B2 (en) | Device for detecting a battery condition based on variations in batter voltage | |
| JP3867581B2 (en) | Assembled battery system | |
| JP5597728B2 (en) | Electric vehicle power storage system | |
| US10809305B2 (en) | System and method for detecting and responding to a battery over-discharge condition within a vehicle | |
| US20110148361A1 (en) | Battery system and method for detecting current restriction state in a battery system | |
| WO2008065910A1 (en) | Accumulator failure detecting device, accumulator failure detecting method, accumulator failure detecting program, and computer-readable recording medium containing the accumulator failure detecting program | |
| JP2000092732A (en) | Method for judging scattering of battery pack and battery device | |
| US9381824B2 (en) | Circuit and method for detection of battery cell drain | |
| JP2008099541A (en) | Battery management system, and drive method therefor | |
| JP3620517B2 (en) | Voltage control device for battery pack | |
| JP2004014205A (en) | Detection system of battery abnormality and degradation | |
| JP4129109B2 (en) | Charge control apparatus and method | |
| JP2005269752A (en) | Power supply device of hybrid car | |
| JP2001314046A (en) | Charging apparatus and method of battery pack and electric vehicle | |
| JP3855497B2 (en) | Charged / discharged state determination method and apparatus for assembled battery | |
| JP3611905B2 (en) | Charge control method for battery pack | |
| JP2004031014A (en) | Maximum charge-discharge power calculation method and device for battery pack including parallel connection battery | |
| JP5154076B2 (en) | Battery pack and battery module and hybrid vehicle using the same | |
| JP5092903B2 (en) | Vehicle battery charge / discharge control device | |
| JP2001339868A (en) | Control method for charge/discharge of battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20050124 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20050208 |
|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20050607 |