JP3599014B2 - Battery discharge control means and vacuum cleaner using the same - Google Patents

Battery discharge control means and vacuum cleaner using the same Download PDF

Info

Publication number
JP3599014B2
JP3599014B2 JP2001326254A JP2001326254A JP3599014B2 JP 3599014 B2 JP3599014 B2 JP 3599014B2 JP 2001326254 A JP2001326254 A JP 2001326254A JP 2001326254 A JP2001326254 A JP 2001326254A JP 3599014 B2 JP3599014 B2 JP 3599014B2
Authority
JP
Japan
Prior art keywords
battery
temperature
amount
load
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.)
Expired - Fee Related
Application number
JP2001326254A
Other languages
Japanese (ja)
Other versions
JP2003132956A (en
Inventor
正樹 ▲高▼橋
雅一 福嶋
裕之 妹尾
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Corp
Panasonic Holdings Corp
Original Assignee
Panasonic Corp
Matsushita Electric Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Panasonic Corp, Matsushita Electric Industrial Co Ltd filed Critical Panasonic Corp
Priority to JP2001326254A priority Critical patent/JP3599014B2/en
Publication of JP2003132956A publication Critical patent/JP2003132956A/en
Application granted granted Critical
Publication of JP3599014B2 publication Critical patent/JP3599014B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

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

  • Electric Suction Cleaners (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は電池の放電制御方法に係わり、特に放電時の電池の温度を検出して負荷に供給する電流量を制御する放電制御手段に関するものである。
【０００２】
【従来の技術】
ニッケル水素二次電池、あるいはニッケルカドミウム二次電池に代表される二次電池（以降電池という）１は携帯用電話機や携帯型撮影機など各種の機器システムの作動電源として、広く実用化されている。また、近年大電流が放電可能となり電動工具や掃除機の電源としても利用されている。３は機器システムの制御手段、４は駆動手段、５は負荷である。
【０００３】
ところで電池１は充電および放電が主要な機能であり、以下に充電放電の制御方法を示す。電池１の充電は図７に示すように一般的に定電流手段１０１によって定電流で急速充電が行われており、電池の温度を検出する温度検知手段１０２（一般的にはサーミスタ）と電池電圧を検出する電池電圧検知手段１０３を充電制御手段１０４に取込、制御されている。急速充電やトリクリ充電で電池１の電圧、電池の温度を随時チェックをし、−△Ｖ値やｄＴ／ｄｔなどで満充電状態になったかを検出している。図８に充電中の電池の温度変化と電池電圧変化の特性図を示す。放電制御については、負荷に応じて電流を供給し、電池の劣化を防ぐため電池電圧、電池の温度を検知して過放電にならないように一定電圧値になったら動作を停止させたり、残量表示を行うものなど様々な制御がある。また電池の温度を検出して一定温度以上になったら停止させるなど電池の寿命を延ばすためにいろいろな放電制御に工夫がなされている。
【０００４】
【発明が解決しようとする課題】
しかしながら、上記従来の構成では、大きな電気量が必要で二次電池の本数を多く使用しているものに関しては、放電を行った直後の二次電池は温度が高くなっており、そのまま急速充電すると充電末期においても電池の温度が冷えずに高温のまま充電されてしまうので著しい充電不足になってしまう。二次電池は充電が完全にできる温度まで冷やすにはかなりの時間を有してしまうので二次電池を充電器にセットしてから充電完了するまでの時間が長くなってしまい使用者が使おうと思っても充電状態になっていることがある。また、上記充電不足状態の充放電を繰り返すと徐々に充電できる電気量（以下充電容量という）が減ってきてしまい、放電するときの使用時間が短くなってしまうとともに電池が劣化してしまうという課題があった。
【０００５】
また、放電末期は電池電圧が急激に落ち、ユーザーが使用していて、急激にパワーが落ちたような感じとなり、実使用上違和感があった。
【０００６】
さらに、多くの本数の電池を完全に樹脂で覆ったものにおいては、電池冷却が遅いだけではなくトリクル充電時も熱がこもってしまい、電池の温度が上がってしまうので自己放電分を補充することができない課題も有していた。
【０００７】
このように、電池を高温で使用すると電池の劣化が著しく早く寿命が短くなるとともに使用時間が短くなるという課題があった。
【０００８】
本発明は、このような課題を解決するためになされたもので、電池本数が多く放電直後の電池の温度を抑え、充電容量が低下しないようにするとともに、使用実感を良くすることができる電池の放電制御手段およびそれを用いた電気機器の提供を目的とする。
【０００９】
【課題を解決するための手段】
上記目的を達成するために本発明は、電池の温度を検出する温度検出手段と、前記電池が負荷に供給する電力量を制御する制御手段と、前記負荷として電気掃除機の本体モータとノズルモータの２つを備え、前記電池の温度が所定値以上になると、前記ノズルモータに供給する放電電流量を増やすと同時に、前記本体モータに供給する放電電流量は抑えるように、前記電池が負荷に供給する電力量を制御する電池の放電手段で、放電時に電池の温度を抑制でき、結果充電時の電池の温度を下げることが可能となり充分な充電を行うことができ、容量低下が生じない。
【００１０】
【発明の実施の形態】
本発明の請求項１記載の発明は、電池の温度を検出する温度検出手段と、前記電池が負荷に供給する電力量を制御する制御手段と、前記負荷として電気掃除機の本体モータとノズルモータの２つを備え、前記電池の温度が所定値以上になると、前記ノズルモータに供給する放電電流量を増やすと同時に、前記本体モータに供給する放電電流量は抑えるように、前記電池が負荷に供給する電力量を制御する電池の放電手段で、放電時に電池の温度を抑制でき、結果充電時の電池の温度を下げることが可能となり充分な充電を行うことができ、容量低下が生じなくすることができる。
【００１１】
本発明の請求項２記載の発明は、請求項１記載の電池の放電手段を用いた電気掃除機で、放電時に電池の温度を抑制でき、結果充電時の電池の温度を下げることが可能となり充分な充電を行うことができ、容量低下が生じない電気掃除機を提供できる。
【００１２】
【実施例】
以下、本発明の一実施例について図面を参照しながら説明する。なお、従来例と同一構成部品については同一符号を付けて説明を省略する。
【００１３】
図１は本発明に係わる電池の一般的な放電制御回路ブロック図、図２は放電時の電池の温度を示す電池の温度特性図、図３は電池の温度に対する電流供給量を示す負荷特性図で、図４はより具体的な放電制御回路ブロック図である。
【００１４】
図において、１は電池、２は電池１の温度を検出する温度検出手段、３は電池１の放電電流量を制御することで負荷に供給する電流量を制御する制御手段、４は第一の負荷５を駆動する第一駆動手段、６は第二の負荷７を駆動する第二駆動手段である。
【００１５】
次にその動作について説明する。十分に充電された電池１から電流を負荷５，７に供給するために使用者が操作手段（図示せず）を操作すると制御手段３はまず、電池の温度を温度検出手段２から入力し、電池の温度を確認する。そして電池の温度がある値以下だと負荷に電流を供給するよう第一、第二の駆動手段４，６に信号を出力し、第一、第二の負荷に電力を供給する。この時、電池の温度は、電流を供給し続けると図２に示すように上昇していく。ところが電池にとって、電池の温度がある値以上になると電池の劣化につながる。そこで、電池１の温度上昇を抑えるよう負荷に供給する電流量を制御する。例えば、図２に示すようにある温度ｔ１までは、フルに電流を供給するが、電池の温度がｔ１を越えると供給する電流量を少なくし、電池の温度が上昇がΔｔ以下となるように制御し完全に放電しても、電池の温度がある値ｔ２以下に抑えられるようにする。
【００１６】
また、充電状態や待機状態によって電池の温度は異なる。そのため放電開始時の電池の温度に応じてΔｔを補正し、完全放電時の温度がｔ２以下となるように制御する。つまり、放電開始時の温度が高いとΔｔを小さめに補正し、反対に温度が低いとΔｔを大きめに補正する。
【００１７】
さらに、電池の電圧は図３に示すように電池容量が多い間はほぼ一定の値を保持するが、電池の残容量が少なくなると急激に電池電圧が低くなり、放電初期と比べて供給電流が同じでも、負荷に供給できる電力量が少なくなる。そこで図３に示すように、電池の温度の温度がある値ｔ２以上になると、電池電圧が低くなったと判断し、供給電流量をそれまでより多くし、電力量を保つように制御する場合もある。要は電池の温度を上げずに負荷に供給する電力量を保つように制御する。
【００１８】
より具体的な例として、掃除機を例にとって説明する。第一負荷５が本体モータ、第二負荷７がノズルモータである。その動作について説明する。使用者が操作手段（図示せず）を操作すると制御手段３はまず、電池の温度を温度検出手段２から入力し、電池の温度を確認する。そして電池の温度がある値以下だと負荷に電流を供給するよう第一、第二の駆動手段４，６に信号を出力し、本体モータ５とノズルモータ７に電流を供給する。この時、掃除が十分できる電力量を本体モータ５とノズルモータ７に電流を供給する。例えば本体モータ５はフルパワーで、ノズルモータ７は供給量を抑えた電流を供給する。床面のゴミを掻き上げるには回転ブラシ（図示せず）の回転をある一定の回転数以上に保つ必要がある。そこで電池電圧が低くなっても十分回転数が保てるように電池電圧が高い間は、ノズルモータ７に供給する電流量を抑えるように制御し、電池電圧が低くなると、回転数を保つように電流を多くするよう制御している。電池１にとって本体モータ５に供給する電流のほうがノズルモータ７に供給する電流に比べて十分多いため、ノズルモータ７に供給する電流を多くしても、電池電圧が極端に上昇することはない。そして、温度検出手段２で電池の温度を検出しながら電池の温度がｔ２以上になると、本体モータ５に供給する電流量を掃除が出来る範囲で抑え、電池の温度が上昇するのを抑制する。この時、ノズルモータ７に供給する電流量をさらに増やして回転ブラシの回転数を上げることで、回転ブラシの音は若干大きくなるが、本体モータ５の吸引力の低下をノズルモータ７の回転数でカバーするよう制御しても良い。要は電池の温度を上げずに長時間掃除ができるように負荷制御する方式であれば良い。
【００１９】
次に、本発明の第２の実施例について図面を参照しながら説明する。なお、第１の実施例と同一構成部品については同一符号を付けて説明を省略する。
【００２０】
図５は第二の実施例の回路ブロック図、図６は残容量と電池の温度との相関図である。図において、１１は電池１の残容量を検出する残量検出手段である。
【００２１】
次にその動作について説明する。十分に充電された電池１から電流を負荷５，７に供給するために使用者が操作手段（図示せず）を操作すると制御手段３はまず、電池の残容量を残量検出手段１１から入力し、電池の残容量を確認する。そして電池の残容量がある値以下だと負荷に電流を供給するよう第一、第二の駆動手段４，６に信号を出力し、第一、第二の負荷に電力を供給する。この時、電池の残容量は、電流を供給し続けると図６に示すように減少していく。ところが図６に示すように電池にとって、電池の残容量がある値以下になると急激に電池電圧が下がり、使用者にとって違和感を与えるとともに電池の劣化につながる。そこで、電池１の電池電圧が急激に下がるのを抑えるよう負荷に供給する電流量を制御する。例えば、図６に示すようにある残容量ｑ１までは、フルに電流を供給するが、残容量がｑ１以下になると供給する電流量を少なくし、残容量の減少がΔｑ以下となるようなだらかに電池電圧を減少させ、使用時間を延ばしつつ使用者に違和感を与えないように制御する。この結果、図６に示すように完全放電時の電池の温度もｔ２以下になり、電池劣化も防げる。
【００２２】
また、充電状態や待機状態によって残容量は異なる。そのため放電開始時の残容量に応じてΔｑを補正し、完全放電時の温度がｔ２以下となるように制御する。つまり、放電開始時の温度が高いとΔｑを小さめに補正し、反対に温度が低いとΔｑを大きめに補正する。
【００２３】
さらに、充電時の最低温度や使用時間からも充電容量を検出することができる。要は充電後の電池残量を検出できる方式であれば良い。
【００２４】
そして、常に放電時間と充電時間との割合から電池の残容量を算出しておき、現時点の電池の残容量を検出しておくことで、常に最適な電流供給（放電）が可能となる。
【００２５】
【発明の効果】
本発明によれば、電池本数が多く放電直後の電池の温度を抑え、充電容量が低下しないようにするとともに使用実感を良くすることができる電池の放電制御手段およびそれを用いた電気掃除機を提供できる。
【図面の簡単な説明】
【図１】本発明の一実施例を示す電池の放電制御手段の構成を示す回路ブロック図
【図２】同実施例の放電電流特性図
【図３】同実施例の電池温度、放電電流特性図
【図４】同実施例のより具体的な放電制御手段の構成を示す回路ブロック図
【図５】本発明の第２の実施例を示す電池の放電制御手段の構成を示す回路ブロック図
【図６】同実施例の放電特性図
【図７】従来例を示す充電制御の回路ブロック図
【図８】同充電動作説明図
【符号の説明】
１ 電池
２ 温度検出手段
３ 制御手段
４ 第一駆動手段
５ 第一負荷
６ 第二駆動手段
７ 第二負荷
１１ 残容量検出手段[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a discharge control means for controlling the discharge relates to the control method, the amount of current supplied to the load out particularly detects the temperature of the battery during discharging of the battery.
[0002]
[Prior art]
A secondary battery (hereinafter referred to as a battery) 1 typified by a nickel hydride secondary battery or a nickel cadmium secondary battery is widely put into practical use as an operating power supply for various equipment systems such as a portable telephone and a portable photographing machine. . In recent years, a large current can be discharged, and it is used as a power source for electric tools and vacuum cleaners. Reference numeral 3 denotes a control unit of the equipment system, 4 denotes a driving unit, and 5 denotes a load.
[0003]
The battery 1 has a main function of charging and discharging, and a method of controlling charging and discharging will be described below. As shown in FIG. 7, the charging of the battery 1 is generally performed by rapid charging at a constant current by a constant current means 101, and a temperature detecting means 102 (generally a thermistor) for detecting the temperature of the battery and a battery voltage The battery voltage detecting means 103 for detecting the voltage is taken into the charging control means 104 and controlled. The voltage of the battery 1 and the temperature of the battery 1 are checked at any time by rapid charging or trickle charging, and whether or not the battery 1 is fully charged is detected by a -ΔV value or dT / dt. FIG. 8 shows a characteristic diagram of a change in battery temperature and a change in battery voltage during charging. Regarding discharge control, current is supplied according to the load, operation is stopped when a certain voltage value is reached to prevent overdischarge by detecting battery voltage and battery temperature to prevent battery deterioration, There are various controls such as those for displaying. Further, various discharge controls have been devised to extend the life of the battery, such as detecting the temperature of the battery and stopping the battery when the temperature exceeds a certain temperature.
[0004]
[Problems to be solved by the invention]
However, in the above-described conventional configuration, as for a battery that requires a large amount of electricity and uses a large number of secondary batteries, the temperature of the secondary battery immediately after discharging is high, and if the battery is rapidly charged as it is, Even at the end of charging, the battery is charged at a high temperature without being cooled, resulting in a remarkable shortage of charging. Rechargeable batteries have a considerable amount of time to cool down to a temperature where they can be fully charged.Therefore, the time from when the rechargeable battery is set in the charger to when charging is completed becomes longer, and users try to use it. Sometimes it is charged even if you think. In addition, when charge / discharge in the above-described insufficient charge state is repeated, the amount of electricity that can be charged (hereinafter referred to as charge capacity) gradually decreases, so that the use time when discharging is shortened and the battery deteriorates. was there.
[0005]
In addition, at the end of discharge, the battery voltage dropped sharply, and the user was using the battery, and it felt as if the power had dropped sharply.
[0006]
In addition, when many batteries are completely covered with resin, not only the battery cooling is slow, but also heat is trapped during trickle charging, and the temperature of the battery rises. There was also a problem that could not be done.
[0007]
As described above, when the battery is used at a high temperature, there is a problem that the battery is remarkably deteriorated, the life is shortened, and the use time is shortened.
[0008]
The present invention has been made in order to solve such a problem, and has a large number of batteries, suppresses the temperature of the battery immediately after discharging, prevents a reduction in charge capacity, and improves a feeling of use. And an electric device using the same.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a temperature detecting means for detecting a temperature of a battery, a control means for controlling an amount of electric power supplied by the battery to a load, and a main body motor and a nozzle motor of a vacuum cleaner as the load. When the temperature of the battery becomes equal to or higher than a predetermined value, the amount of discharge current supplied to the nozzle motor is increased, and at the same time, the amount of discharge current supplied to the main body motor is reduced. Battery discharging means for controlling the amount of power to be supplied can suppress the temperature of the battery at the time of discharging, and as a result, the temperature of the battery at the time of charging can be lowered, sufficient charging can be performed, and the capacity does not decrease.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
According to the first aspect of the present invention, there is provided a temperature detecting means for detecting a temperature of a battery, a control means for controlling an amount of electric power supplied by the battery to a load, and a main body motor and a nozzle motor of a vacuum cleaner as the load. When the temperature of the battery becomes equal to or higher than a predetermined value, the amount of discharge current supplied to the nozzle motor is increased, and at the same time, the amount of discharge current supplied to the main body motor is reduced. Battery discharging means for controlling the amount of electric power to be supplied can suppress the temperature of the battery at the time of discharging, and as a result, the temperature of the battery at the time of charging can be lowered, sufficient charging can be performed, and the capacity does not decrease. be able to.
[0011]
The invention according to claim 2 of the present invention is a vacuum cleaner using the battery discharging means according to claim 1 , which can suppress the temperature of the battery at the time of discharging, and as a result, can lower the temperature of the battery at the time of charging. It is possible to provide a vacuum cleaner that can perform sufficient charging and does not cause a reduction in capacity.
[0012]
【Example】
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The same components as those of the conventional example are denoted by the same reference numerals, and description thereof will be omitted.
[0013]
FIG. 1 is a block diagram of a general discharge control circuit of a battery according to the present invention, FIG. 2 is a temperature characteristic diagram of the battery showing the temperature of the battery at the time of discharging, and FIG. 3 is a load characteristic diagram showing the amount of current supplied with respect to the temperature of the battery. FIG. 4 is a more specific discharge control circuit block diagram.
[0014]
In the figure, 1 is a battery, 2 is a temperature detecting means for detecting the temperature of the battery 1, 3 is a control means for controlling the amount of current supplied to the load by controlling the amount of discharge current of the battery 1, and 4 is a first means. The first driving means for driving the load 5, and the second driving means 6 for driving the second load 7.
[0015]
Next, the operation will be described. When the user operates the operating means (not shown) in order to supply current from the fully charged battery 1 to the loads 5 and 7, the control means 3 first inputs the temperature of the battery from the temperature detecting means 2, Check the battery temperature. When the battery temperature is lower than a certain value, a signal is output to the first and second driving means 4 and 6 to supply current to the load, and power is supplied to the first and second loads. At this time, the temperature of the battery rises as shown in FIG. 2 when current is continuously supplied. However, for a battery, when the temperature of the battery exceeds a certain value, the battery is deteriorated. Therefore, the amount of current supplied to the load is controlled so as to suppress the temperature rise of the battery 1. For example, as shown in FIG. 2, the current is fully supplied up to a certain temperature t1, but when the battery temperature exceeds t1, the amount of supplied current is reduced so that the battery temperature rises to Δt or less. Even when the battery is controlled and completely discharged, the temperature of the battery is controlled to a certain value t2 or less.
[0016]
Further, the temperature of the battery differs depending on the charging state and the standby state. Therefore, Δt is corrected in accordance with the temperature of the battery at the start of discharge, and control is performed so that the temperature at the time of complete discharge is equal to or less than t2. That is, if the temperature at the start of discharge is high, Δt is corrected to be small, and if the temperature is low, Δt is corrected to be large.
[0017]
Further, as shown in FIG. 3, the voltage of the battery keeps a substantially constant value while the battery capacity is large, but the battery voltage decreases rapidly when the remaining capacity of the battery decreases, and the supply current is lower than in the initial stage of discharging. Even at the same time, the amount of power that can be supplied to the load is reduced. Therefore, as shown in FIG. 3, when the temperature of the battery becomes equal to or higher than a certain value t2, it is determined that the battery voltage has become low, and the supply current amount is increased to that point, and control is performed so as to maintain the power amount. is there. In short, control is performed so as to maintain the amount of power supplied to the load without raising the temperature of the battery.
[0018]
As a more specific example, a vacuum cleaner will be described as an example. The first load 5 is a main body motor, and the second load 7 is a nozzle motor. The operation will be described. When the user operates the operation means (not shown), the control means 3 first inputs the battery temperature from the temperature detection means 2 and checks the battery temperature. When the temperature of the battery is lower than a certain value, a signal is output to the first and second driving means 4 and 6 so as to supply current to the load, and current is supplied to the main body motor 5 and the nozzle motor 7. At this time, it supplies a current amount of power cleaning can enough to the main motor 5 and the nozzle motor 7. For example, the main body motor 5 supplies full power, and the nozzle motor 7 supplies a reduced amount of current. In order to scoop up dust on the floor, it is necessary to keep the rotation of a rotating brush (not shown) at a certain rotation speed or more. Therefore, while the battery voltage is high so that the rotation speed can be sufficiently maintained even when the battery voltage becomes low, control is performed so as to suppress the amount of current supplied to the nozzle motor 7, and when the battery voltage becomes low, the current is controlled so as to maintain the rotation speed. Is controlled to increase. Since the current supplied to the main body motor 5 is sufficiently larger than the current supplied to the nozzle motor 7 for the battery 1, even if the current supplied to the nozzle motor 7 is increased, the battery voltage does not rise extremely. When the temperature of the battery is equal to or higher than t2 while the temperature of the battery is detected by the temperature detecting means 2, the amount of current supplied to the main body motor 5 is suppressed within a range where cleaning is possible, and the rise in battery temperature is suppressed. At this time, by further increasing the amount of current supplied to the nozzle motor 7 and increasing the rotation speed of the rotating brush, the noise of the rotating brush slightly increases, but the suction force of the main body motor 5 decreases and the rotation speed of the nozzle motor 7 decreases. It may be controlled to cover with. In short, any method may be used as long as the load is controlled so that cleaning can be performed for a long time without increasing the temperature of the battery.
[0019]
Next, a second embodiment of the present invention will be described with reference to the drawings. The same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.
[0020]
FIG. 5 is a circuit block diagram of the second embodiment, and FIG. 6 is a correlation diagram between the remaining capacity and the battery temperature. In the figure, reference numeral 11 denotes a remaining amount detecting means for detecting the remaining capacity of the battery 1.
[0021]
Next, the operation will be described. When the user operates the operation means (not shown) to supply current from the fully charged battery 1 to the loads 5 and 7, the control means 3 first inputs the remaining capacity of the battery from the remaining capacity detection means 11. And check the remaining battery capacity. If the remaining capacity of the battery is below a certain value, a signal is output to the first and second driving means 4 and 6 to supply current to the load, and power is supplied to the first and second loads. At this time, the remaining capacity of the battery decreases as shown in FIG. 6 when current is continuously supplied. However, as shown in FIG. 6, when the remaining capacity of the battery falls below a certain value, the battery voltage drops sharply, giving the user a sense of incongruity and deteriorating the battery. Therefore, to control the amount of current supplied to so that the load suppressing the battery voltages of the battery 1 falls sharply. For example, as shown in FIG. 6, a current is fully supplied up to a certain remaining capacity q1, but when the remaining capacity becomes q1 or less, the amount of current to be supplied is reduced, and the remaining capacity decreases gradually to Δq or less. Control is performed so as to reduce the battery voltage and extend the use time so that the user does not feel uncomfortable. As a result, as shown in FIG. 6, the temperature of the battery at the time of complete discharge also becomes t2 or less, and battery deterioration can be prevented.
[0022]
The remaining capacity differs depending on the charging state and the standby state. Therefore, Δq is corrected according to the remaining capacity at the start of discharge, and control is performed so that the temperature at the time of complete discharge is equal to or less than t2. That is, if the temperature at the start of discharge is high, Δq is corrected to be small, and if the temperature is low, Δq is corrected to be large.
[0023]
Further, the charging capacity can be detected from the minimum temperature and the usage time during charging. In short, any method can be used as long as it can detect the remaining battery level after charging.
[0024]
Then, by always calculating the remaining capacity of the battery from the ratio between the discharging time and the charging time and detecting the remaining capacity of the battery at the present time, optimal current supply (discharge) can always be performed.
[0025]
【The invention's effect】
According to the present invention, a battery discharge control means and a vacuum cleaner using the same, in which the number of batteries is large and the temperature of the battery immediately after discharge can be suppressed, the charge capacity is not reduced, and the feeling of use can be improved. Can be provided.
[Brief description of the drawings]
FIG. 1 is a circuit block diagram showing a configuration of a battery discharge control unit according to an embodiment of the present invention. FIG. 2 is a discharge current characteristic diagram of the embodiment. FIG. 3 is a battery temperature and discharge current characteristic of the embodiment. FIG. 4 is a circuit block diagram showing a more specific configuration of discharge control means of the embodiment. FIG. 5 is a circuit block diagram showing a configuration of a battery discharge control means showing a second embodiment of the present invention. FIG. 6 is a discharge characteristic diagram of the embodiment. FIG. 7 is a circuit block diagram of a charge control showing a conventional example. FIG. 8 is an explanatory diagram of the charge operation.
DESCRIPTION OF SYMBOLS 1 Battery 2 Temperature detecting means 3 Control means 4 First driving means 5 First load 6 Second driving means 7 Second load 11 Remaining capacity detecting means

Claims (2)

電池の温度を検出する温度検出手段と、前記電池が負荷に供給する電力量を制御する制御手段と、前記負荷として電気掃除機の本体モータとノズルモータの２つを備え、前記電池の温度が所定値以上になると、前記ノズルモータに供給する放電電流量を増やすと同時に、前記本体モータに供給する放電電流量は抑えるように、前記電池が負荷に供給する電力量を制御する電池の放電手段。Temperature detecting means for detecting the temperature of the battery, control means for controlling the amount of power supplied to the load by the battery , and two of the main body motor and the nozzle motor of the vacuum cleaner as the load, the temperature of the battery is A battery discharging means for controlling the amount of power supplied to the load by the battery so as to increase the amount of discharge current supplied to the nozzle motor and suppress the amount of discharge current supplied to the main body motor at the same time when the value exceeds a predetermined value. . 請求項１記載の電池の放電手段を用いた電気掃除機。An electric vacuum cleaner using the battery discharging means according to claim 1 .
JP2001326254A 2001-10-24 2001-10-24 Battery discharge control means and vacuum cleaner using the same Expired - Fee Related JP3599014B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2001326254A JP3599014B2 (en) 2001-10-24 2001-10-24 Battery discharge control means and vacuum cleaner using the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2001326254A JP3599014B2 (en) 2001-10-24 2001-10-24 Battery discharge control means and vacuum cleaner using the same

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP2004157399A Division JP2004253398A (en) 2004-05-27 2004-05-27 Discharging method of battery and electric equipment using the same

Publications (2)

Publication Number Publication Date
JP2003132956A JP2003132956A (en) 2003-05-09
JP3599014B2 true JP3599014B2 (en) 2004-12-08

Family

ID=19142663

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2001326254A Expired - Fee Related JP3599014B2 (en) 2001-10-24 2001-10-24 Battery discharge control means and vacuum cleaner using the same

Country Status (1)

Country Link
JP (1) JP3599014B2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5481018B2 (en) * 2007-05-17 2014-04-23 矢崎エナジーシステム株式会社 Battery voltage drop detection device
JP6314098B2 (en) * 2015-02-20 2018-04-18 日立アプライアンス株式会社 Rechargeable vacuum cleaner
JP6690975B2 (en) * 2016-03-22 2020-04-28 東芝ライフスタイル株式会社 Vacuum cleaner

Also Published As

Publication number Publication date
JP2003132956A (en) 2003-05-09

Similar Documents

Publication Publication Date Title
EP1667308B1 (en) Secondary battery device
JP2004357481A (en) Method of charging a plurality of batteries, and method of discharging
JP2001095158A (en) Battery power unit and electric apparatus using the same
JP4796784B2 (en) Rechargeable battery charging method
JP3599014B2 (en) Battery discharge control means and vacuum cleaner using the same
JP3306188B2 (en) Rechargeable battery charging method
JP2000324703A (en) Battery pack
JP3693000B2 (en) Secondary battery charge control method and electric device using the same
JP2004253398A (en) Discharging method of battery and electric equipment using the same
JP2003324858A (en) Charging apparatus for electrical device and vacuum cleaner
JPH11150882A (en) Method for charging battery
JP2004057367A (en) Vacuum cleaner
JP3737150B2 (en) Secondary battery charging control method
JP2730516B2 (en) Charger with collective discharge function using discharge energy for cooling fan power
JP7061007B2 (en) Electrical equipment
JPH07123602A (en) Method for charging secondary battery
JP3034924B2 (en) Charging device
JP3940923B2 (en) Charging device, charging target device, and charging system
JP3328987B2 (en) Charging control method and charging device
JP4108822B2 (en) Detachable battery pack and its charger
JPH1066278A (en) Charging device
JP2004113595A (en) Vacuum cleaner
JP2003134687A (en) Method for controlling charging of secondary battery and electrical equipment using the same
JPH1032939A (en) Charge control method and device of secondary battery
CN113140817A (en) Charging control method and device, computer readable storage medium and charger

Legal Events

Date Code Title Description
A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20040330

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20040527

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20040824

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20040906

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20080924

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20080924

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20090924

Year of fee payment: 5

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20090924

Year of fee payment: 5

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20100924

Year of fee payment: 6

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110924

Year of fee payment: 7

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120924

Year of fee payment: 8

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130924

Year of fee payment: 9

LAPS Cancellation because of no payment of annual fees