JP4768273B2 - Battery pack - Google Patents
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- JP4768273B2 JP4768273B2 JP2005005105A JP2005005105A JP4768273B2 JP 4768273 B2 JP4768273 B2 JP 4768273B2 JP 2005005105 A JP2005005105 A JP 2005005105A JP 2005005105 A JP2005005105 A JP 2005005105A JP 4768273 B2 JP4768273 B2 JP 4768273B2
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Description
本発明は電池パックに関するものであり、特に低温時において、常温時と同様に高い充放電効率を得ることができ、更には高電流密度での充放電を可能とした電池パックに関する。 The present invention relates to a battery pack, and in particular, to a battery pack that can obtain high charge / discharge efficiency at a low temperature as in normal temperature, and that can be charged / discharged at a high current density.
電池の充放電は低温度では、効率が低下することが知られている。非水電解液を使用した電池は水性電解液を用いた電池に比べて低温度での特性は優れているものの、低温度で電池の充電を行うと常温時に比べて充電効率が低くなり、また充電時間も長くなるとともに充電量も不充分なものとなる。 It is known that charging / discharging of a battery will reduce efficiency at low temperatures. Batteries using non-aqueous electrolytes have better characteristics at low temperatures than batteries using aqueous electrolytes, but charging the batteries at low temperatures results in lower charging efficiency than at normal temperatures. The charging time becomes longer and the charging amount becomes insufficient.
そこで、低温時における充電の問題点を解決することが提案されている。例えば、電池パックに電池温度測定手段を設け、電池温度が所定の温度以下の場合に、充電器から電池加熱用の電流を受け取り電池を加熱するヒータを備えた電池パックが提案されている（例えば、特許文献１）。
しかしながら、電池の効率の低下は、充電時のみではなく放電時においても生じるものであって、電池パックの充電時の加熱では効率的な充放電が可能な電池パックを提供することはできなかった。
However, the decrease in battery efficiency occurs not only during charging but also during discharging, and it has not been possible to provide a battery pack that can be efficiently charged and discharged by heating during charging of the battery pack. .
本発明は、低温度での電池の充電効率の低下、および放電効率の低下がなく、低温度でも充放電容量の利用効率が大きな電池パックを提供することを課題とするものであり、特に充電時のみではなく放電時において低温度にさらされた場合にも放電容量が低下することがない電池パックを提供することを課題とするものである。 An object of the present invention is to provide a battery pack that does not have a decrease in charge efficiency and discharge efficiency of a battery at a low temperature and has a large utilization efficiency of charge / discharge capacity even at a low temperature. It is an object of the present invention to provide a battery pack in which the discharge capacity does not decrease when exposed to a low temperature not only during discharge but also during discharge.
本発明の課題は、充放電可能な電池を収納した電池パックにおいて、電池温度センサ、電池加熱手段、電池温度センサによって電池温度を検出する電池温度検出手段、電池加熱手段への通電電流を制御する電池加熱制御手段を有し、電池温度検出手段によって測定した電池温度があらかじめ設定した温度よりも低い場合に、電池加熱制御手段が電池加熱手段への通電電流を制御して、電池の充電時には充電電流から電池加熱手段に電流を供給し、電池の放電時には電池から電池加熱手段に電流を供給して電池を加熱する電池パックによって解決することができる。
また、電池はリチウム非水電解液電池である前記の電池パックである。
An object of the present invention is to control a battery temperature sensor, a battery heating means, a battery temperature detection means for detecting a battery temperature by the battery temperature sensor, and an energization current to the battery heating means in a battery pack containing a chargeable / dischargeable battery. The battery heating control means has a battery heating control means, and when the battery temperature measured by the battery temperature detection means is lower than a preset temperature, the battery heating control means controls the energization current to the battery heating means and charges when charging the battery. A battery pack that heats the battery by supplying current from the current to the battery heating means and supplying current from the battery to the battery heating means when the battery is discharged can be solved.
Further, the battery is the above battery pack which is a lithium non-aqueous electrolyte battery.
本発明の電池パックは、充電、放電のいずれの場合においても、電池温度を感知して、電池温度が所定の温度よりも低い場合に電池加熱手段によって電池を加熱したので効率的な充放電が可能となる。 The battery pack of the present invention senses the battery temperature in both cases of charging and discharging, and when the battery temperature is lower than a predetermined temperature, the battery is heated by the battery heating means. It becomes possible.
本発明は、電池の充電時に温度が低い場合に充電電流から加熱手段に電流を供給して電池を加熱するとともに、放電時においても電池自体から加熱手段に対して加熱エネルギーを供給することによって、電池の加熱によって放電特性が改善されて、加熱に使用した電流によって消費された電気量よりも放電特性の改善によって実質的に放電可能な電気量が増加し、充放電容量が大きな電池パックを提供することができることを見いだしたものである。 The present invention heats the battery by supplying current from the charging current to the heating means when the temperature is low during charging of the battery, and by supplying heating energy from the battery itself to the heating means even during discharge, Discharge characteristics are improved by heating the battery, and the amount of electricity that can be discharged is substantially increased by improving the discharge characteristics compared to the amount of electricity consumed by the current used for heating, providing a battery pack with a large charge / discharge capacity. I found out what I can do.
充電時の電池パック内部の電池の加熱は、充電器から供給される電流によって比較的容易に行うことができ、電池の容量にも影響を与えないものである。そのため、周囲温度が低い場合に充電時に電池を加熱して充電が効率的に行われるようにすることが行われていたが、放電時に電池を加熱する場合には、電池の加熱電流を加熱対象の電池自体から供給せざるを得ない。 The battery inside the battery pack during charging can be heated relatively easily by the current supplied from the charger, and does not affect the battery capacity. Therefore, when the ambient temperature is low, the battery is heated at the time of charging so that the charging is performed efficiently. However, when the battery is heated at the time of discharging, the heating current of the battery is heated. The battery itself must be supplied.
図１は、電池の放電容量の温度依存性の一例を説明する図である。
図１に示した例では、電池温度が−１０℃の場合には、０℃、２５℃に比べて放電容量が小さくなることを示しており、特に放電が進むほど、低温時の放電電圧の低下が大きくなることを示している。
放電時に電池自体の有するエネルギーを使用して電池を加熱した場合には、加熱によって温度上昇した電池は、電池加熱に消費されたエネルギーを差し引いても、全体としての電池の放電エネルギーを大きくすることができる。その結果、電池温度の上昇によって大きな電気量を取り出すことが可能となり、実質的な放電容量を増大させることが可能であることを見いだしたものである。
FIG. 1 is a diagram for explaining an example of the temperature dependence of the discharge capacity of a battery.
The example shown in FIG. 1 shows that when the battery temperature is −10 ° C., the discharge capacity is smaller than that at 0 ° C. and 25 ° C., and in particular, as the discharge progresses, It shows that the decrease is greater.
When the battery is heated using the energy of the battery itself at the time of discharging, the battery whose temperature has increased due to heating should increase the discharge energy of the battery as a whole even if the energy consumed for battery heating is subtracted. Can do. As a result, it has been found that a large amount of electricity can be taken out due to an increase in battery temperature, and a substantial discharge capacity can be increased.
以下に、図面を参照して本発明を説明する。
図２は、本発明の電池パックの一実施例を説明する図である。
電池パック１は、リチウム二次電池等からなる二次電池２、充電器、あるいは電池パック使用機器との接続端子３を有し、電池の充放電を制御する充放電制御手段４、電池２の温度を測定可能なサーミスタ等の温度センサ５、電気ヒータ、正温度特性サーミスタ等からなる電池加熱手段６が配置されている。
The present invention will be described below with reference to the drawings.
FIG. 2 is a diagram for explaining an embodiment of the battery pack of the present invention.
The
また、温度センサ５によって温度を検出する温度検出手段７を有しており、温度検出手段７の検出結果に基づいて電池温度加熱手段６への通電電流を制御する電池加熱制御手段８を有しており、電池加熱手段６の近傍には、電池温度が異常に高くなった場合には、電池温度加熱手段６への電流を遮断する温度フューズ９が配置されている。
また、接続端子３には、電池パック使用機器１０または充電器が接続される。
Further, it has a temperature detection means 7 for detecting the temperature by the
Further, the battery
本発明の電池パック１は、充電時には接続端子３に充電器が接続されて、電池パックに電流が供給される。
その際に温度センサ５による検出温度が所定の温度よりも低い場合には、温度検出手段７は、電池加熱制御手段８に対して、電池加熱手段６に電流を通電するように指示を与える。電池加熱制御手段８は、充放電制御手段４から与えられて情報に基づいて電池が充電動作中か放電動作中かを判断し、電池加熱手段６に対して、電池温度、充電動作か放電動作かの別に応じた所定の加熱電流を通電する。
In the
At that time, if the temperature detected by the
電池が接続端子３に電池使用機器が接続されて放電動作中である場合には、温度センサ５による検出温度が所定の温度よりも低い場合には、温度検出手段７は、電池加熱制御手段８に対して、電池加熱手段６に電流を通電する指示を与えるが、電池加熱制御手段８は、電池温度検出時の消費電流、電池温度と目標温度との差に応じた加熱電流を電池加熱手段に対して通電するが、電池加熱手段への通電時に電池使用機器へ供給される電流が不充分なものとならないような加熱電流を連続的、もしくは段階的に調整することが好ましい。
When a battery is connected to the connection terminal 3 and the battery is in a discharging operation, when the temperature detected by the
本発明の電池パックは、充電動作中、放電動作中のいずれの場合においても、電池温度を感知して、電池温度が所定の温度よりも低い場合に電池加熱手段によって電池を加熱したので、電池温度の低下による充放電特性の悪化を防止して効率的な充放電が可能な電池パックを提供することが可能となる。 In the battery pack of the present invention, the battery temperature is sensed in both the charging operation and the discharging operation, and the battery is heated by the battery heating means when the battery temperature is lower than the predetermined temperature. It is possible to provide a battery pack capable of efficiently charging / discharging by preventing deterioration of charge / discharge characteristics due to a decrease in temperature.
１…電池パック、２…二次電池、３…接続端子、４…充放電制御手段、５…温度センサ、６…電池加熱手段、７…温度検出手段、８…電池加熱制御手段、９…温度フューズ、１０…電池パック使用機器
DESCRIPTION OF
Claims (2)
電池温度センサ、電池加熱手段、電池温度センサによって電池温度を検出する電池温度検出手段、電池加熱手段への通電電流を制御する電池加熱制御手段を有し、
電池温度検出手段によって測定した電池温度があらかじめ設定した温度よりも低い場合に、電池加熱制御手段が電池加熱手段への通電電流を制御して、電池の充電時には充電電流から電池加熱手段に電流を供給し、電池の放電時には電池から電池加熱手段に電流を供給して電池を加熱することを特徴とする電池パック。 In battery packs that store rechargeable batteries,
Battery temperature sensor, battery heating means, battery temperature detection means for detecting the battery temperature by the battery temperature sensor, battery heating control means for controlling the energization current to the battery heating means,
When the battery temperature measured by the battery temperature detecting means is lower than a preset temperature, the battery heating control means controls the current supplied to the battery heating means, and when charging the battery, the current is supplied from the charging current to the battery heating means. A battery pack, characterized in that when the battery is discharged, the battery is heated by supplying current from the battery to the battery heating means .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005005105A JP4768273B2 (en) | 2005-01-12 | 2005-01-12 | Battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005005105A JP4768273B2 (en) | 2005-01-12 | 2005-01-12 | Battery pack |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2006196256A JP2006196256A (en) | 2006-07-27 |
| JP4768273B2 true JP4768273B2 (en) | 2011-09-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| JP2005005105A Expired - Lifetime JP4768273B2 (en) | 2005-01-12 | 2005-01-12 | Battery pack |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITMI20061296A1 (en) | 2006-07-04 | 2008-01-05 | Campagnolo Srl | METHOD OF CONTROL AND SYSTEM OF CHARGING A BATTERY POWER UNIT |
| JP5178094B2 (en) * | 2007-08-27 | 2013-04-10 | キヤノン株式会社 | Battery, control method, and program |
| JPWO2011145250A1 (en) * | 2010-05-17 | 2013-07-22 | パナソニック株式会社 | Lithium ion secondary battery system and battery pack |
| JP5472396B2 (en) * | 2011-10-27 | 2014-04-16 | 株式会社デンソー | In-vehicle emergency call device |
| US11533953B2 (en) | 2016-06-29 | 2022-12-27 | Philip Morris Products S.A. | Battery powered aerosol-generating device comprising a temperature dependent battery pre-heating |
| JP7532635B2 (en) * | 2020-07-14 | 2024-08-13 | フィリップ・モーリス・プロダクツ・ソシエテ・アノニム | Electronic device having multi-function battery heater |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10284133A (en) * | 1997-04-08 | 1998-10-23 | Sony Corp | Battery pack and battery pack charging method |
| JP2004171897A (en) * | 2002-11-19 | 2004-06-17 | Sony Corp | Power supply device and battery heating method |
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2005
- 2005-01-12 JP JP2005005105A patent/JP4768273B2/en not_active Expired - Lifetime
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| Publication number | Publication date |
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| JP2006196256A (en) | 2006-07-27 |
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