JP2009289694A - Battery pack - Google Patents

Battery pack Download PDF

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Publication number
JP2009289694A
JP2009289694A JP2008143421A JP2008143421A JP2009289694A JP 2009289694 A JP2009289694 A JP 2009289694A JP 2008143421 A JP2008143421 A JP 2008143421A JP 2008143421 A JP2008143421 A JP 2008143421A JP 2009289694 A JP2009289694 A JP 2009289694A
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Prior art keywords
battery pack
shape memory
memory alloy
battery
cooling air
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JP2008143421A
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Japanese (ja)
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Toshiyuki Suzuki
利幸 鈴木
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Koki Holdings Co Ltd
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Hitachi Koki Co Ltd
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Priority to JP2008143421A priority Critical patent/JP2009289694A/en
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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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  • Battery Mounting, Suspending (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To remove such a fault as deterioration of a member inside a battery cell while charging due to a temperature of a battery pack to make shorter a life of charging and discharging. <P>SOLUTION: In a suction port and an exhausting port of a battery pack or inside the battery pack, there is provided a shape memory alloy which changes a shape by temperature at least at one place or more, and the direction and flow of cooling air taken inside through the suction port matching a shape of the battery pack are controlled to solve the above problem. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、電池パックの吸気穴や排気穴 または、電池パック内に温度の変化により変形する形状記憶合金を取り付け、電池組を低温環境時は保温性を向上させ、電池組が高温時には効率良く冷却する電池パックに関するものである。   The present invention attaches a shape memory alloy that deforms due to changes in temperature to the intake and exhaust holes of the battery pack or changes the temperature inside the battery pack, improves the heat retention in a low temperature environment, and efficiently when the battery set is at a high temperature. The present invention relates to a battery pack to be cooled.

従来の電池パックを図７、図８を用いて説明する。図７の従来の電池パックの一例を示す断面図と図８の従来の電池パックを構成する上ケースを示す要部図に示すように、電池パック１は充電器3の送風装置４より充電器３の外気１５を上ケース７の吸気穴２からの冷却風１２により電池組８の熱を奪い排気穴５より排出し電池組８を冷却している。   A conventional battery pack will be described with reference to FIGS. As shown in a cross-sectional view of an example of the conventional battery pack in FIG. 7 and a main part diagram showing an upper case constituting the conventional battery pack in FIG. 8, the battery pack 1 is charged from the blower 4 of the charger 3. 3 cools the battery set 8 by removing heat from the battery set 8 by the cooling air 12 from the intake hole 2 of the upper case 7 and exhausting the heat from the exhaust hole 5.

下記特許文献１に示されるように、電池パック内にファンを取り付ける方法の他には、特許文献２及び３のように、送風装置からの風を吸気穴から取り込み排気穴へ排出する方法を行っており、ケースのリブ形状等で風の流れを作りこむ構造を特徴としている。   As shown in Patent Document 1 below, in addition to the method of mounting a fan in the battery pack, as in Patent Documents 2 and 3, a method of taking wind from the blower from the intake hole and discharging it to the exhaust hole is performed. It features a structure that creates wind flow with the rib shape of the case.

特開２０００−１２１０７号公報JP 2000-12107 A 特開２０００−１５６２５１号公報JP 2000-156251 A 特開２００３−１９７１６７号公報JP 2003-197167 A

上記した従来の電池パックでは、電池組の形状により冷却風が電池組の一部に届きにくい。充電器は電池パック内に設けてある少なくても１つ以上のサーミスタ等で電池組の温度を検知しており、充放電後の温度が高い電池パックを冷却風で冷やし、検知温度が充電に適した温度になると充電を開始している。しかし、冷却風の届きにくい位置は充電に適した温度になっていないので、充電を行うことで電池セル内部の部材が熱により劣化し、充放電寿命が短くなるという欠点があった。   In the conventional battery pack described above, the cooling air hardly reaches a part of the battery set due to the shape of the battery set. The charger detects the temperature of the battery set with at least one thermistor provided in the battery pack, cools the battery pack with high temperature after charging / discharging with cooling air, and the detected temperature is charged. Charging starts when the temperature is appropriate. However, since the position where the cooling air is difficult to reach is not at a temperature suitable for charging, there is a drawback in that charging causes the members inside the battery cell to be deteriorated by heat and the charge / discharge life is shortened.

また、電池パックが高温でなくても充電器の送風装置から冷却風が送風されるため、電池組が冷えてしまう欠点がある。   Further, since the cooling air is blown from the blower of the charger even if the battery pack is not hot, there is a drawback that the battery set is cooled.

本発明の目的は、上記従来の欠点を解消し、電池パックの効率のよい冷却方式により、電池パックの充放電寿命の長い電池パックを提供することである。   An object of the present invention is to provide a battery pack having a long charge / discharge life of the battery pack by eliminating the above-mentioned conventional drawbacks and using an efficient cooling method of the battery pack.

上記目的は、電池パックの吸入口や排気口 または、電池パック内部に、少なくとも１箇所以上に温度により形状が変化する形状記憶合金を設けて、電池組の形状に合わせて吸気穴より取り入れた冷却風の向きや流れをコントロールし、電池パック内部に均等に冷却風を流すという構成とすることにより達成することができる。   The purpose of the above is to provide a shape memory alloy that changes its shape depending on the temperature in at least one location inside the battery pack's inlet and exhaust ports or inside the battery pack, and to cool the battery pack through the intake holes according to the shape of the battery assembly. This can be achieved by controlling the direction and flow of the wind and allowing the cooling air to flow evenly inside the battery pack.

本発明の電池パックは、形状記憶合金の温度による形状変化を利用し、充電器からの冷却風を電池組に均等にあてる事ができ、温度検知による充電開始時の電池組を均等な温度にすることができ、電池セル内部の部材を熱により劣化から保護することで、充放電寿命を長くすることができる。   The battery pack of the present invention utilizes the shape change due to the temperature of the shape memory alloy, can evenly apply the cooling air from the charger to the battery set, and sets the battery set at the start of charging by temperature detection to a uniform temperature. It is possible to extend the charge / discharge life by protecting the members inside the battery cells from deterioration by heat.

本発明電池パックの一実施形態を図１〜図６を用いて説明する。図１は電池パックの一実施形態を示す断面図、図２は電池パックを構成する上ケース一実施形態を示す図１の要部図、図３は弾性体付の形状記憶合金の側面図である。電池パック１の上ケース７の充電器３の送風装置４からくる冷却風１２を吸入する吸入穴２へ片面に熱伝達のしにくい弾性体が付属する温度により形状が変化する弾性体付の形状記憶合金９を、電池組８が最適に冷却できる風の向きになるように設ける。   An embodiment of the battery pack of the present invention will be described with reference to FIGS. 1 is a cross-sectional view showing an embodiment of a battery pack, FIG. 2 is a main part view of FIG. 1 showing an embodiment of an upper case constituting the battery pack, and FIG. 3 is a side view of a shape memory alloy with an elastic body. is there. A shape with an elastic body whose shape changes depending on the temperature attached to the suction hole 2 for sucking the cooling air 12 coming from the blower 4 of the charger 3 of the charger 3 of the upper case 7 of the battery pack 1 depending on the temperature. The memory alloy 9 is provided so as to have a wind direction that allows the battery set 8 to be optimally cooled.

弾性体付の形状記憶合金９は、吸気穴２側を弾性体側１４とし電池組８側を形状記憶合金側１３とすることで、送風装置４からくる冷却風１２による温度変化の影響を受けない構造とする。
弾性体付の形状記憶合金９は、電池組８の温度が上がると吸気穴２を開状態にして、送風装置４からくる冷却風１２を吸入することができるようになり、冷却風１２は形状記憶合金９の開いている方向へ優先的に流れ込むようになる。 The shape memory alloy 9 with an elastic body is not affected by the temperature change caused by the cooling air 12 coming from the blower 4 by setting the intake hole 2 side to the elastic body side 14 and the battery assembly 8 side to the shape memory alloy side 13. Structure.
The shape memory alloy 9 with an elastic body can open the intake hole 2 when the temperature of the battery set 8 rises, and can suck the cooling air 12 coming from the blower 4. The memory alloy 9 flows preferentially in the opening direction.

弾性体付の形状記憶合金９は、電池組８の温度が下がると吸気穴２を閉状態にして、送風装置４からくる冷却風12を吸入できなくすることで、電池組８が必要以上に冷却されない状態にできる。また、電池パックが高温でない場合、吸気穴２は閉状態なので、電池パックを使用していない時に電池パック1内へ粉塵が入る事を防止できる。   The shape memory alloy 9 with the elastic body closes the intake hole 2 when the temperature of the battery set 8 is lowered, so that the cooling air 12 coming from the blower 4 cannot be sucked, so that the battery set 8 is more than necessary. Can be uncooled. Further, when the battery pack is not hot, the intake hole 2 is closed, so that dust can be prevented from entering the battery pack 1 when the battery pack is not used.

次に、本発明電池パックの他の実施形態を図４〜図６を用いて説明する。図４は電池パックの他の実施形態を示す側面図である。形状記憶合金１３を排気穴5に設け、吸気穴２より吸入する冷却風12の流れをとめる。これにより電池組８が必要以上に冷却される事を防止する。また、電池パックが高温でない場合、排気穴5は閉状態なので、コードレス工具使用中に、電池パック１内へ粉塵が入る事を防止できる。   Next, another embodiment of the battery pack of the present invention will be described with reference to FIGS. FIG. 4 is a side view showing another embodiment of the battery pack. A shape memory alloy 13 is provided in the exhaust hole 5 to stop the flow of the cooling air 12 sucked from the intake hole 2. This prevents the battery set 8 from being cooled more than necessary. Further, when the battery pack is not hot, the exhaust hole 5 is closed, so that dust can be prevented from entering the battery pack 1 during use of the cordless tool.

その他、図５は電池パックを構成する上ケースである。上ケース７に形状記憶合金１３を設け、吸気穴２からの冷却風１２の流れを変えることができるようにする。   FIG. 5 shows an upper case constituting the battery pack. A shape memory alloy 13 is provided in the upper case 7 so that the flow of the cooling air 12 from the intake hole 2 can be changed.

その他、図６の電池パックを構成する下ケースに示すように、下ケース６に形状記憶合金１３を設け、冷却風１２の流れを変え排気穴５へ排出できるようにする。これにより、温度の高い部分を優先的に冷却する構造が可能となる。   In addition, as shown in the lower case constituting the battery pack of FIG. 6, a shape memory alloy 13 is provided in the lower case 6 so that the flow of the cooling air 12 can be changed and discharged to the exhaust hole 5. Thereby, the structure which preferentially cools a part with high temperature is attained.

本発明電池パックの一実施形態を示す断面図。Sectional drawing which shows one Embodiment of this invention battery pack. 本発明電池パックを構成する上ケース一実施形態を示す図１の要部図。The principal part figure of FIG. 1 which shows one embodiment of the upper case which comprises this invention battery pack. 本発明電池パックを構成する弾性体付の形状記憶合金の側面図。The side view of the shape memory alloy with an elastic body which comprises this invention battery pack. 本発明電池パックのその他実施形態を示す断面図。Sectional drawing which shows other embodiment of this invention battery pack. 本発明電池パックを構成する上ケースその他実施形態を示す要部図。The principal part figure which shows upper case and other embodiment which comprise this invention battery pack. 本発明電池パックを構成する下ケースその他実施形態を示す要部図。The principal part figure which shows lower case and other embodiment which comprise this invention battery pack. 従来の電池パックの一例を示す断面図。Sectional drawing which shows an example of the conventional battery pack. 従来の電池パックを構成する上ケースを示す要部図。The principal part figure which shows the upper case which comprises the conventional battery pack.

符号の説明Explanation of symbols

１…電池パック
２…吸気穴
３…充電器
４…送風装置
５…排気穴
６…下ケース
７…上ケース
８…電池組
９…弾性体付の形状記憶合金
１０…セパレータ
１１…サーミスタ
１２…冷却風
１３…形状記憶合金
１４…低熱伝導率弾性体
１５…外気 DESCRIPTION OF SYMBOLS 1 ... Battery pack 2 ... Intake hole 3 ... Charger 4 ... Air blower 5 ... Exhaust hole 6 ... Lower case 7 ... Upper case 8 ... Battery assembly 9 ... Shape memory alloy 10 with an elastic body ... Separator 11 ... Thermistor 12 ... Cooling Wind 13 ... Shape memory alloy 14 ... Low thermal conductivity elastic body 15 ... Outside air

Claims (5)

複数の2次電池セルからなる電池組を収容しするとともに充電器へ着脱可能な着脱部を設けたケ-スに、前記充電器に内蔵した送風装置の吹き出し部と対向する位置に吸気穴を設けると共に、排気穴を設けた電池パックにおいて、
前記ケース内の温度変化により変形する形状記憶合金を配置し、前記形状記憶合金の形状に応じて前記ケース内に吹き出される前記送風装置の冷却風の流れを変更するようにしたを特徴とする電池パック。 An air intake hole is provided at a position facing a blowing portion of a blower built in the charger in a case that accommodates a battery set including a plurality of secondary battery cells and is provided with a detachable portion that can be attached to and detached from the charger. In the battery pack provided with exhaust holes,
A shape memory alloy that is deformed by a temperature change in the case is arranged, and a flow of cooling air of the blower blown into the case is changed according to a shape of the shape memory alloy. Battery pack. 前記送風装置からの冷却風が適した方向に流れるようすることで、電池組の熱を効率良く冷却する構造を特徴としたことを特徴とする請求項１に記載の電池パック。   2. The battery pack according to claim 1, wherein the battery pack has a structure for efficiently cooling the heat of the battery set by allowing the cooling air from the blower to flow in a suitable direction. 3. 前記排気穴に前記形状記憶合金を設け、冷却風が流れにくい構造を特徴としたことを特徴とする請求項１又は請求項２に記載の電池パック。   3. The battery pack according to claim 1, wherein the shape memory alloy is provided in the exhaust hole so that cooling air hardly flows. 前記形状記憶合金を少なくても１つ以上用いて、前記送風装置の冷却風を電池パック内で整流するようにしたことを特徴とする請求項１から請求項３のいずれかに記載の電池パック。   The battery pack according to any one of claims 1 to 3, wherein at least one of the shape memory alloys is used to rectify the cooling air of the blower in the battery pack. . 前記吸気穴に前記形状記憶合金を配置し、前記ケース内が充放電に適正な温度になった時、前記吸気穴を閉鎖して、保温し低温になることを防止する構造を特徴としたことを特徴とする請求項１から請求項４のいずれかに記載の電池パック。   The shape memory alloy is disposed in the intake hole, and when the inside of the case reaches an appropriate temperature for charging / discharging, the intake hole is closed to keep the heat and prevent the temperature from becoming low. The battery pack according to any one of claims 1 to 4, wherein:
JP2008143421A 2008-05-30 2008-05-30 Battery pack Withdrawn JP2009289694A (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014030339A2 (en) 2012-08-22 2014-02-27 Hitachi Koki Co., Ltd. Battery pack and electric device
DE202014100475U1 (en) 2013-03-01 2014-05-19 Hitachi Koki Co., Ltd. Battery pack and electrical appliance
CN106602175A (en) * 2017-01-26 2017-04-26 合肥国轩高科动力能源有限公司 Battery liquid cooling device and battery system
JPWO2016067808A1 (en) * 2014-10-31 2017-09-14 日立工機株式会社 Charger
CN109326749A (en) * 2017-08-01 2019-02-12 罗伯特·博世有限公司 The application of battery module and this battery module
CN111725586A (en) * 2020-07-17 2020-09-29 大连理工大学 Lithium ion battery pack heat management device
CN115882120A (en) * 2022-09-23 2023-03-31 四川新能源汽车创新中心有限公司 Temperature control device and battery module

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014030339A2 (en) 2012-08-22 2014-02-27 Hitachi Koki Co., Ltd. Battery pack and electric device
DE202014100475U1 (en) 2013-03-01 2014-05-19 Hitachi Koki Co., Ltd. Battery pack and electrical appliance
JPWO2016067808A1 (en) * 2014-10-31 2017-09-14 日立工機株式会社 Charger
CN106602175A (en) * 2017-01-26 2017-04-26 合肥国轩高科动力能源有限公司 Battery liquid cooling device and battery system
CN109326749A (en) * 2017-08-01 2019-02-12 罗伯特·博世有限公司 The application of battery module and this battery module
CN109326749B (en) * 2017-08-01 2022-08-23 罗伯特·博世有限公司 Battery module and use of such a battery module
CN111725586A (en) * 2020-07-17 2020-09-29 大连理工大学 Lithium ion battery pack heat management device
CN111725586B (en) * 2020-07-17 2021-08-13 大连理工大学 Lithium ion battery pack heat management device
CN115882120A (en) * 2022-09-23 2023-03-31 四川新能源汽车创新中心有限公司 Temperature control device and battery module

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