JP2003031187A - Secondary cell and cell pack - Google Patents
Secondary cell and cell packInfo
- Publication number
- JP2003031187A JP2003031187A JP2001216353A JP2001216353A JP2003031187A JP 2003031187 A JP2003031187 A JP 2003031187A JP 2001216353 A JP2001216353 A JP 2001216353A JP 2001216353 A JP2001216353 A JP 2001216353A JP 2003031187 A JP2003031187 A JP 2003031187A
- Authority
- JP
- Japan
- Prior art keywords
- battery
- hydroxide
- pack
- endothermic
- compound
- 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
- Sealing Battery Cases Or Jackets (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、二次電池および電
池パックに関し、特に電池が過充電状態に陥っても、保
護ユニットなしで安全な二次電池および電池パックする
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a secondary battery and a battery pack, and more particularly to a secondary battery and a battery pack that are safe without a protection unit even when the battery falls into an overcharged state.
【０００２】[0002]
【従来の技術】二次電池および電池パックにおいては、
電池の過充電状態時の発熱や、電池特性の劣化防止の為
の措置が、多方面よりなされているが、さらに高エネル
ギー密度を目指して、電池外部に施策する方法が求めら
れている。2. Description of the Related Art In secondary batteries and battery packs,
Although various measures have been taken to prevent heat generation when the battery is overcharged and deterioration of the battery characteristics, there is a demand for a method of taking measures outside the battery in order to achieve a higher energy density.
【０００３】まず、図４に従来の電池パックの概念構造
図を示す。図４において、１は正極端子、２は電池ケー
ス、３は外装フィルム、４は外装パック、５はリードを
示す。電池ケース２の中には充放電可能な発電要素が収
納されており、負極端子も兼ねている。それぞれの電池
は直列につながっており、電池ケース２と正極端子１は
それぞれリード５でつながり、電池パックの外部正極端
子６と外部負極端子７により外部に取出される。したが
って、図４のように電池を直列につないだ場合は、それ
ぞれの電池ケースが直接接触するとショートしてしま
う。それを防ぐために、正極端子１側の電池ケース２の
少なくとも半分以上を外装フィルム３で、覆う必要があ
る。また、電池パック内に具備された二次電池が１個の
みの場合は、外装フィルムは必要ではない。First, FIG. 4 shows a conceptual structural diagram of a conventional battery pack. In FIG. 4, 1 is a positive electrode terminal, 2 is a battery case, 3 is an exterior film, 4 is an exterior pack, and 5 is a lead. A chargeable / dischargeable power generating element is housed in the battery case 2 and also serves as a negative electrode terminal. The respective batteries are connected in series, the battery case 2 and the positive electrode terminal 1 are connected by a lead 5, and are taken out by an external positive electrode terminal 6 and an external negative electrode terminal 7 of the battery pack. Therefore, when batteries are connected in series as shown in FIG. 4, a short circuit occurs when the battery cases come into direct contact with each other. In order to prevent this, at least half or more of the battery case 2 on the positive electrode terminal 1 side needs to be covered with the exterior film 3. In addition, when only one secondary battery is provided in the battery pack, the exterior film is not necessary.
【０００４】現行の二次電池では、電池に異常が発生し
た際の発熱反応を抑制し、異常反応を停止する為に電池
の内部や外部に複数の安全措置がとられている。しか
し、現状では、安全性と高エネルギー密度化要求が十分
に両立している技術は少なく、安全性に優れた二次電池
および電池パックを得るためには、これらの両立可能な
新技術を開発することが望まれている。電池に異常が発
生した際の発熱反応を抑制するために、これまで以下の
ような対策がなされてきた。In the current secondary battery, a plurality of safety measures are taken inside or outside the battery in order to suppress the exothermic reaction when an abnormality occurs in the battery and stop the abnormal reaction. However, at present, there are few technologies that satisfy both safety and high energy density requirements sufficiently, and in order to obtain secondary batteries and battery packs with excellent safety, we have developed new technologies that are compatible with both. Is desired. The following measures have been taken so far in order to suppress the exothermic reaction when an abnormality occurs in the battery.
【０００５】電池内部に化合物を添加する方法として
は、水酸化物を添加し、温度上昇時の反応生成物により
電池特性の劣化を防ぐ技術（特開平１１−１９１４１７
号公報等）などがあるが、いずれも電池内に添加するた
め電極反応の阻害や、エネルギー密度の低下が起こるた
め好ましくない。また、電池の外部の施策としては、外
装フィルムに放熱性をもたせた技術（特開２０００−２
８５８７３号公報）があるが、外装フィルムの放熱も、
自然放熱だけでは放熱性に限度があった。As a method of adding a compound to the inside of a battery, a technique of adding a hydroxide to prevent deterioration of battery characteristics due to a reaction product when the temperature rises (JP-A-11-191417).
However, all of them are not preferable because they are added to the battery, which hinders the electrode reaction and lowers the energy density. In addition, as a measure for the outside of the battery, a technique in which the exterior film has heat dissipation (Japanese Patent Laid-Open No. 2000-2
No. 85873), but the heat dissipation of the exterior film
There was a limit to heat dissipation only by natural heat dissipation.
【０００６】そして、電池パックの外装パックの内壁面
に、パルプと水酸化アルミニウムの混合系からなる断熱
シートを配設した構成（特開平８−１６２１６９号公
報）も提案されているが、断熱シートは、パックの強度
にも電池の容量にも寄与しないため、高容量化の点で不
利であった。A structure in which a heat insulating sheet made of a mixed system of pulp and aluminum hydroxide is arranged on the inner wall surface of the outer pack of the battery pack (Japanese Patent Laid-Open No. 8-162169) is also proposed. Has a disadvantage in increasing the capacity because it does not contribute to the strength of the pack or the capacity of the battery.
【０００７】[0007]
【発明が解決しようとする課題】以上述べたとおり、こ
れらの従来技術では、十分に高エネルギー密度化と安全
性を両立する要求に応じることが出来なかった。本発明
の目的は、電池性能を変化させることなく容易に電池の
安全性を向上させることが可能で、高エネルギー密度か
つコンパクトで、安全性に優れた二次電池および電池パ
ックを得ることである。As described above, these prior arts cannot meet the demand for achieving both high energy density and safety. An object of the present invention is to obtain a secondary battery and a battery pack which can easily improve the battery safety without changing the battery performance, have a high energy density and are compact, and have excellent safety. .
【０００８】[0008]
【課題を解決するための手段】本発明の二次電池および
電池パックは、二次電池および電池パックの外装フィル
ムもしくは外装パック材に電池の異常反応を抑制するた
め、吸熱反応を有する化合物からなる吸熱剤を添加させ
ることを特徴とするものであり、電池の異常発熱の際に
電池から熱を奪うことにより電池温度の上昇を抑制し、
異常反応を停止する作用がある。A secondary battery and a battery pack of the present invention are made of a compound having an endothermic reaction in an outer film or an outer pack material of the secondary battery and the battery pack in order to suppress abnormal reaction of the battery. It is characterized by adding a heat absorbing agent, and suppresses an increase in battery temperature by removing heat from the battery during abnormal heat generation of the battery,
It has the effect of stopping abnormal reactions.
【０００９】また、これらの吸熱剤は、電池の発熱反応
開始温度と同様の温度範囲である１００〜１４０℃の間
に吸熱反応を有する化合物からなるのが好ましい。Further, these endothermic agents are preferably composed of a compound having an endothermic reaction within a temperature range of 100 to 140 ° C. which is the same temperature range as the exothermic reaction initiation temperature of the battery.
【００１０】さらに、吸熱反応を有する化合物として水
酸化亜鉛、水酸化アルミニウム、水酸化コバルト、水酸
化カルシウム、水酸化ジルコニウム、水酸化ニッケル、
酸化アルミニウム水和物を外装フィルムもしくは外装パ
ック材もしくは外装フィルムの粘着剤中に含有させるも
のも、特に好ましい。Further, as a compound having an endothermic reaction, zinc hydroxide, aluminum hydroxide, cobalt hydroxide, calcium hydroxide, zirconium hydroxide, nickel hydroxide,
It is also particularly preferable that the aluminum oxide hydrate is contained in the outer film, the outer pack material, or the adhesive of the outer film.
【００１１】以上のような構成により、たとえ電池が熱
を帯びることがあっても、吸熱性をもつ外装フィルムも
しくは外装パックもしくは、外装フィルム中の粘着剤に
より安全性に富み、電池の外部への添加である為、高エ
ネルギー密度化要求に寄与した電池を得ることが可能に
なり、電池性能を変化させることなく容易に電池の安全
性を向上させることが可能で、高エネルギー密度かつコ
ンパクトで、安全性に優れた二次電池および電池パック
を得ることができる。With the above-mentioned structure, even if the battery may be heated, the external film or the external pack having an endothermic property or the adhesive in the external film provides a high degree of safety and prevents the battery from being exposed to the outside. Since it is an addition, it is possible to obtain a battery that has contributed to the requirement for high energy density, and it is possible to easily improve the safety of the battery without changing the battery performance, and it is possible to obtain a high energy density and compact size. A secondary battery and a battery pack having excellent safety can be obtained.
【００１２】[0012]
【発明の実施の形態】以下、本発明の実施の形態を図面
を参照しながら説明する。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.
【００１３】本発明の二次電池は、充放電可能な発電要
素を電池ケース内に具備し、前記電池ケースが外装フィ
ルムで覆われている二次電池において、前記外装フィル
ム材または外装フィルムの粘着剤に、吸熱反応を有する
化合物からなる吸熱剤を含有していることを特徴とする
ものである。The secondary battery of the present invention is a secondary battery in which a chargeable / dischargeable power generating element is provided in a battery case, and the battery case is covered with an exterior film. The agent is characterized by containing an endothermic agent composed of a compound having an endothermic reaction.
【００１４】図１に本発明の一実施形態による二次電池
を内蔵した電池パックの概念構造図を示す。図１におい
て、図４と同様に、１は正極端子、２は電池ケース、３
は外装フィルム、４は外装パック、５はリードを示す。
また、電池ケース２の中には充放電可能な発電要素が収
納されており、負極端子も兼ねている。それぞれの電池
は直列につながっており、電池ケース２と正極端子１は
それぞれリード５でつながり、電池パックの外部正極端
子６と外部負極端子７により外部に取出される。FIG. 1 is a conceptual structural diagram of a battery pack incorporating a secondary battery according to an embodiment of the present invention. In FIG. 1, as in FIG. 4, 1 is a positive electrode terminal, 2 is a battery case, 3
Is an exterior film, 4 is an exterior pack, and 5 is a lead.
In addition, the battery case 2 accommodates a chargeable / dischargeable power generation element and also serves as a negative electrode terminal. The respective batteries are connected in series, the battery case 2 and the positive electrode terminal 1 are connected by a lead 5, and are taken out by an external positive electrode terminal 6 and an external negative electrode terminal 7 of the battery pack.
【００１５】外装フィルム３は、吸熱反応を有する化合
物からなる吸熱剤８と外装フィルム材９からなってお
り、そして外装フィルム材９には、ポリエチレン又は、
ポリ塩化ビニールなどの樹脂材料を用いることができ
る。吸熱反応を有する化合物としては、電池の発熱反応
開始温度と同様の温度範囲である１００〜１４０℃の間
に吸熱反応を有する化合物が好ましく、特に、水酸化亜
鉛、水酸化アルミニウム、水酸化コバルト、水酸化カル
シウム、水酸化ジルコニウム、水酸化ニッケル、酸化ア
ルミニウム水和物のいずれかを含有したものが好まし
い。この吸熱性を持った外装フィルム３により、電池に
発生した熱を吸熱することが出来て安全である。The exterior film 3 comprises an endothermic agent 8 made of a compound having an endothermic reaction and an exterior film material 9, and the exterior film material 9 is made of polyethylene or
A resin material such as polyvinyl chloride can be used. As the compound having an endothermic reaction, a compound having an endothermic reaction within a temperature range of 100 to 140 ° C. which is the same temperature range as the exothermic reaction initiation temperature of the battery is preferable, and particularly zinc hydroxide, aluminum hydroxide, cobalt hydroxide, Those containing any one of calcium hydroxide, zirconium hydroxide, nickel hydroxide and aluminum oxide hydrate are preferable. The exterior film 3 having this endothermic property can absorb the heat generated in the battery, which is safe.
【００１６】図２に本発明の別の実施形態による二次電
池を内蔵した電池パックの概念構造図を示す。図２にお
いて、図１と同じ符号は、同じ名称を持ち、同じ作用効
果を示すものを指す。図２に示す二次電池は、吸熱性外
装フィルム材を用いる代わりに、吸熱剤８’を含む粘着
剤１０を外装フィルム剤９’の接着に使用したものであ
る。吸熱剤８’としては、電池の発熱反応開始温度と同
様の温度範囲である１００〜１４０℃の間に吸熱反応を
有する化合物からなることが好ましく、特に、水酸化亜
鉛、水酸化アルミニウム、水酸化コバルト、水酸化カル
シウム、水酸化ジルコニウム、水酸化ニッケル、酸化ア
ルミニウム水和物のいずれかを含有したものが好まし
い。粘着剤１０に、吸熱剤を含有させても、外装フィル
ムへの添加時と同様の吸熱効果が得られて、安全性に優
れた電池とすることができる。FIG. 2 is a conceptual structural diagram of a battery pack incorporating a secondary battery according to another embodiment of the present invention. 2, the same reference numerals as those in FIG. 1 have the same names and indicate the same effects. In the secondary battery shown in FIG. 2, instead of using the heat-absorbing exterior film material, the pressure sensitive adhesive 10 containing the heat absorbing agent 8'is used for bonding the exterior film agent 9 '. The endothermic agent 8'is preferably composed of a compound having an endothermic reaction within a temperature range of 100 to 140 ° C., which is the same temperature range as the exothermic reaction initiation temperature of the battery, and particularly zinc hydroxide, aluminum hydroxide, and hydroxide. Those containing any one of cobalt, calcium hydroxide, zirconium hydroxide, nickel hydroxide and aluminum oxide hydrate are preferable. Even if the pressure-sensitive adhesive 10 contains a heat-absorbing agent, the same heat-absorbing effect as when added to the exterior film can be obtained, and a battery having excellent safety can be obtained.
【００１７】また、本発明の電池パックは、外装フィル
ムで覆われている二次電池または外装フィルムで覆われ
ていない二次電池を樹脂製の外装パック内に具備した電
池パックにおいて、前記外装パックの樹脂材料内に、吸
熱反応を有する化合物からなる吸熱剤を含有しているこ
とを特徴とするものである。Further, the battery pack of the present invention is a battery pack in which a secondary battery covered with an exterior film or a secondary battery not covered with an exterior film is provided in a resin-made exterior pack. This resin material contains an endothermic agent composed of a compound having an endothermic reaction.
【００１８】図３に本発明の一実施形態による電池パッ
クの概念構造図を示す。図３において、図１と同じ符号
は、同じ名称を持ち、同じ作用効果を示すものを指す。
さらに図３において、外装パック４は樹脂製パックケ−
スで、樹脂材料１１の中に吸熱剤８’’を含有する。吸
熱剤８’’としては、電池の発熱反応開始温度と同様の
温度範囲である１００〜１４０℃の間に吸熱反応を有す
る化合物からなることが好ましく、特に、水酸化亜鉛、
水酸化アルミニウム、水酸化コバルト、水酸化カルシウ
ム、水酸化ジルコニウム、水酸化ニッケル、酸化アルミ
ニウム水和物のいずれかを含有したものが好ましい。FIG. 3 is a conceptual structural diagram of a battery pack according to an embodiment of the present invention. 3, the same reference numerals as those in FIG. 1 have the same names and indicate the same effects.
Further, in FIG. 3, the exterior pack 4 is a resin pack case.
The resin material 11 contains the heat absorbing agent 8 ″. The endothermic agent 8 '' is preferably made of a compound having an endothermic reaction within a temperature range of 100 to 140 ° C. which is the same temperature range as the exothermic reaction initiation temperature of the battery, and particularly zinc hydroxide,
Those containing any one of aluminum hydroxide, cobalt hydroxide, calcium hydroxide, zirconium hydroxide, nickel hydroxide and aluminum oxide hydrate are preferable.
【００１９】本電池パックも吸熱剤を含む外装パック４
によって電池パック内に熱が発生しても、その熱を内部
にこもらせることなく、吸熱ができて安全である。This battery pack is also an exterior pack 4 containing a heat absorbing agent.
Even if heat is generated in the battery pack, it is safe because it can absorb heat without being stored inside.
【００２０】なお、保護ユニットなどは特に説明を要す
るものではないため省略する。また、図１から３は複数
の素電池を組にした組電池の入った電池パックである
が、電池パックは、素電池を１個しか含まない電池パッ
クであってもよい。この場合、電池ケースを覆う外装フ
ィルムは必ずしも必要ではない。Incidentally, the protection unit and the like do not require special explanation, and are omitted. Further, although FIGS. 1 to 3 show a battery pack containing an assembled battery in which a plurality of unit cells are assembled, the battery pack may be a battery pack including only one unit cell. In this case, the exterior film that covers the battery case is not always necessary.
【００２１】[0021]
【実施例】（実験１）ポリ塩化ビニール１００重量部に
対して吸熱剤３重量部を含有したシート状の吸熱性フィ
ルム材を作製した。この吸熱性フィルム材の厚みを８０
μｍとし、二次電池の外装フィルムに用いた。吸熱剤と
は水酸化亜鉛、水酸化アルミニウム、水酸化コバルト、
水酸化カルシウム、水酸化ジルコニウム、水酸化ニッケ
ル、酸化アルミニウム水和物であり、吸熱反応の温度範
囲が異なる為、含有化合物の種類を変えることで吸熱特
性の異なる外装フィルムが得られる。吸熱反応の開始温
度が１００℃付近の化合物（水酸化カルシウム、水酸化
アルミニウム、水酸化コバルト、水酸化ジルコニウム、
水酸化ニッケル、酸化アルミニウム水和物）を含有させ
た外装フィルムを使用した電池をそれぞれ電池Ａ１〜Ａ
６、吸熱反応の開始温度が１２０℃付近の化合物（水酸
化亜鉛、水酸化ニッケル）を含有させた外装フィルムを
使用した電池をそれぞれ電池Ｂ１、Ｂ２とした。比較例
として、従来のポリ塩化ビニール樹脂チューブのみを外
装フィルムに使用した電池Ｃを用いた。なお、これらの
二次電池は、すべて同じリチウムイオン二次電池で、容
量が１８００ｍＡｈのものである。Example (Experiment 1) A sheet-shaped heat absorbing film material containing 3 parts by weight of an endothermic agent with respect to 100 parts by weight of polyvinyl chloride was prepared. The thickness of this heat absorbing film material is 80
μm and used as an exterior film of a secondary battery. The endothermic agent is zinc hydroxide, aluminum hydroxide, cobalt hydroxide,
Since calcium hydroxide, zirconium hydroxide, nickel hydroxide, and aluminum oxide hydrate have different endothermic reaction temperature ranges, by changing the type of the contained compound, exterior films having different endothermic properties can be obtained. Compounds (calcium hydroxide, aluminum hydroxide, cobalt hydroxide, zirconium hydroxide
Batteries using an exterior film containing nickel hydroxide, aluminum oxide hydrate) are batteries A1 to A, respectively.
6. Batteries using the exterior film containing a compound (zinc hydroxide, nickel hydroxide) having an endothermic reaction starting temperature of about 120 ° C. were designated as batteries B1 and B2, respectively. As a comparative example, a battery C using only a conventional polyvinyl chloride resin tube as an exterior film was used. It should be noted that these secondary batteries are all the same lithium ion secondary battery and have a capacity of 1800 mAh.
【００２２】これらのＡ１〜Ａ６、Ｂ１、Ｂ２、Ｃの電
池をそれぞれ３直列の組電池とし、テストとして、安全
機構である保護ユニットを設置しない状態で図１または
図４に示す通りにアクリロニトリル−ブタジエン−スチ
レン共重合体（ＡＢＳ）樹脂製の外装パック４（厚さ２
ｍｍ）を用いて電池パックを作製した。そして各々の電
池パックをＡ’１〜Ａ’６、Ｂ’１、Ｂ’２、Ｃ’とし
た。これらの電池パックについて、過充電試験を行っ
た。過充電試験の条件は２７００ｍＡ（１．５Ｃ）の定
電流で行い、異常発熱の有無を評価した。試験数はいず
れも１０パックとした。その結果を（表１）に示す。Each of the batteries A1 to A6, B1, B2, and C was used as a battery pack in three series, and as a test, as shown in FIG. 1 or FIG. 4, without a protective unit as a safety mechanism, as shown in FIG. Outer pack 4 (thickness 2 made of butadiene-styrene copolymer (ABS) resin
mm) was used to prepare a battery pack. And each battery pack was set to A'1-A'6, B'1, B'2, C '. An overcharge test was performed on these battery packs. The condition of the overcharge test was performed at a constant current of 2700 mA (1.5 C), and the presence or absence of abnormal heat generation was evaluated. The number of tests was 10 packs. The results are shown in (Table 1).
【００２３】[0023]
【表１】 [Table 1]
【００２４】この（表１）から明らかなように、電池パ
ックＡ’１〜Ａ’６およびＢ１’、Ｂ’２のように、外
装フィルムとして吸熱性フィルム材を用いると安全性が
高くなることがわかる。安全機構がなくても異常発熱せ
ず、安全性に優れている。さらに、過充電試験中の電池
表面温度を測定すると、本発明の電池パックＡ’１〜
Ａ’６およびＢ１’、Ｂ’２に関しては、電池表面温度
の上昇速度が鈍いことが確認できた。これは、上記の吸
熱性フィルム材で過充電時の発熱が比較的急激に放熱さ
れ、その結果、発煙するに至らなかった為である。As is clear from this (Table 1), when a heat-absorbing film material is used as the exterior film as in the battery packs A'1 to A'6 and B1 ', B'2, the safety is enhanced. I understand. Even without a safety mechanism, it does not generate abnormal heat and has excellent safety. Furthermore, when the battery surface temperature during the overcharge test is measured, the battery pack A'1 to
Regarding A′6, B1 ′, and B′2, it was confirmed that the rate of increase in the battery surface temperature was slow. This is because the above-mentioned heat absorbing film material radiated the heat generated during overcharging relatively rapidly and, as a result, did not emit smoke.
【００２５】（実験２）マレイン酸変性ポリエチレン１
００重量部に対して水酸化アルミニウム３重量部を含有
した粘着剤を作製した。さらに、厚みが６０μｍのポリ
塩化ビニールからなる外装フィルム材の内側に、この粘
着剤を２０μｍの厚みで塗布し、実験１と同じリチウム
イオン二次電池の外装フィルムに用いた。この外装フィ
ルムを使用した電池を電池Ｄとした。この電池Ｄをそれ
ぞれ３直列の組電池とし、テストとして、安全機構であ
る保護ユニットを設置しない状態で図２に示す通りに実
験１と同じ外装パック４を用い電池パックＤを作製し
た。(Experiment 2) Maleic acid-modified polyethylene 1
An adhesive containing 3 parts by weight of aluminum hydroxide was prepared with respect to 00 parts by weight. Further, this adhesive was applied in a thickness of 20 μm to the inside of an exterior film material made of polyvinyl chloride having a thickness of 60 μm, and used as the exterior film of the same lithium ion secondary battery as in Experiment 1. The battery using this exterior film was designated as Battery D. Each of the batteries D was an assembled battery of three series, and as a test, a battery pack D was produced using the same outer pack 4 as in Experiment 1 as shown in FIG. 2 without the protection unit as a safety mechanism being installed.
【００２６】次に、実験１で用いた従来のポリ塩化ビニ
ール樹脂チューブのみを外装フィルムに使用した電池Ｃ
を用い、この電池Ｄをそれぞれ３直列の組電池とし、テ
ストとして、安全機構である保護ユニットを設置しない
状態で図３に示す通りに電池パックＥを作製した。電池
パックＥの図３で示した外装パック４の樹脂材料には、
ＡＢＳ（アクリロニトリル−ブタジエン−スチレン共重
合体）樹脂１００重量部に対して水酸化アルミニウム３
重量部を含有したものを用い、厚さは実験１と同様に２
ｍｍとした。Next, a battery C using only the conventional polyvinyl chloride resin tube used in Experiment 1 as the exterior film
As a test, a battery pack E was produced as shown in FIG. 3 without using a protection unit as a safety mechanism. The resin material of the battery pack E shown in FIG.
Aluminum hydroxide 3 to 100 parts by weight of ABS (acrylonitrile-butadiene-styrene copolymer) resin
The one containing the weight part is used, and the thickness is 2 as in Experiment 1.
mm.
【００２７】これら電池パックＤおよびＥを実験１と同
様の条件で試験した結果を（表２）に示した。The results of testing these battery packs D and E under the same conditions as in Experiment 1 are shown in (Table 2).
【００２８】[0028]
【表２】 [Table 2]
【００２９】（表２）の結果から分かるように、本実施
例の場合においても異常時に安全な電池パックを供給す
ることが実現できた。As can be seen from the results of (Table 2), it was possible to supply a safe battery pack even in the case of this embodiment in the case of an abnormality.
【００３０】[0030]
【発明の効果】以上のように本発明によれば、二次電池
および電池パックの外装フィルムもしくは外装パック材
に電池の異常反応を抑制するため、吸熱反応を有する化
合物からなる吸熱剤を添加させることにより、たとえ電
池が過充電状態に陥っても、保護ユニットなしで安全な
二次電池および電池パックを提供することができる。As described above, according to the present invention, an endothermic agent composed of a compound having an endothermic reaction is added to the outer film or the outer pack material of the secondary battery and the battery pack in order to suppress abnormal reaction of the battery. This makes it possible to provide a safe secondary battery and battery pack without a protection unit even if the battery falls into an overcharged state.
【図面の簡単な説明】[Brief description of drawings]
【図１】本発明の一実施形態による二次電池を内蔵した
電池パックを示す概念構造図FIG. 1 is a conceptual structural diagram showing a battery pack incorporating a secondary battery according to an embodiment of the present invention.
【図２】本発明の別の実施形態による二次電池を内蔵し
た電池パックを示す概念構造図FIG. 2 is a conceptual structural diagram showing a battery pack incorporating a secondary battery according to another embodiment of the present invention.
【図３】本発明の一実施形態による電池パックを示す概
念構造図FIG. 3 is a conceptual structural diagram showing a battery pack according to an embodiment of the present invention.
【図４】従来の電池パックを示す概念構造図FIG. 4 is a conceptual structural diagram showing a conventional battery pack.
１ 正極端子 ２ 電池ケース ３ 外装フィルム ４ 外装パック ５ リード ６ 外部正極端子 ７ 外部負極端子 ８、８’、８’’ 吸熱剤 ９、９’ 外装フィルム材 １０ 粘着剤 １１ 樹脂材料 1 Positive terminal 2 battery case 3 exterior film 4 exterior pack 5 leads 6 External positive terminal 7 External negative terminal 8, 8 ', 8' 'endothermic agent 9,9 'Exterior film material 10 Adhesive 11 Resin material
───────────────────────────────────────────────────── フロントページの続き (72)発明者 松尾 明 大阪府門真市大字門真1006番地 松下電器 産業株式会社内 Ｆターム(参考） 5H011 AA13 BB04 CC05 5H040 AA28 AA37 AY04 AY08 LL04 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Akira Matsuo 1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric Sangyo Co., Ltd. F-term (reference) 5H011 AA13 BB04 CC05 5H040 AA28 AA37 AY04 AY08 LL04
Claims (6)
具備し、前記電池ケースが外装フィルムで覆われている
二次電池において、 前記外装フィルム材または外装フィルムの粘着剤に、吸
熱反応を有する化合物からなる吸熱剤を含有しているこ
とを特徴とする二次電池。1. A secondary battery comprising a chargeable / dischargeable power generating element in a battery case, the battery case being covered with an exterior film, wherein the exterior film material or the adhesive of the exterior film is subjected to an endothermic reaction. A secondary battery comprising an endothermic agent composed of the compound having.
吸熱反応を有する化合物からなることを特徴とする請求
項１記載の二次電池。2. The secondary battery according to claim 1, wherein the endothermic agent comprises a compound having an endothermic reaction at 100 to 140 ° C.
化亜鉛、水酸化アルミニウム、水酸化コバルト、水酸化
カルシウム、水酸化ジルコニウム、水酸化ニッケル、酸
化アルミニウム水和物から選ばれた少なくとも１種類で
あることを特徴とする請求項１記載の二次電池。3. The endothermic compound is at least one selected from zinc hydroxide, aluminum hydroxide, cobalt hydroxide, calcium hydroxide, zirconium hydroxide, nickel hydroxide and aluminum oxide hydrate. The secondary battery according to claim 1, wherein
たは外装フィルムで覆われていない二次電池を樹脂製の
外装パック内に具備した電池パックにおいて、 前記外装パックの樹脂材料内に、吸熱反応を有する化合
物からなる吸熱剤を含有していることを特徴とする電池
パック。4. A battery pack comprising a secondary battery covered with an exterior film or a secondary battery not covered with an exterior film in a resin exterior pack, wherein the resin material of the exterior pack absorbs heat. A battery pack comprising an endothermic agent composed of a reactive compound.
吸熱反応を有する化合物からなることを特徴とする請求
項４記載の電池パック。5. The battery pack according to claim 4, wherein the endothermic agent comprises a compound having an endothermic reaction at 100 to 140 ° C.
化亜鉛、水酸化アルミニウム、水酸化コバルト、水酸化
カルシウム、水酸化ジルコニウム、水酸化ニッケル、酸
化アルミニウム水和物から選ばれた少なくとも１種類で
あることを特徴とする請求項４記載の電池パック。6. The endothermic compound is at least one selected from zinc hydroxide, aluminum hydroxide, cobalt hydroxide, calcium hydroxide, zirconium hydroxide, nickel hydroxide and aluminum oxide hydrate. The battery pack according to claim 4, wherein
Priority Applications (1)
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|---|---|---|---|
| JP2001216353A JP2003031187A (en) | 2001-07-17 | 2001-07-17 | Secondary cell and cell pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001216353A JP2003031187A (en) | 2001-07-17 | 2001-07-17 | Secondary cell and cell pack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003031187A true JP2003031187A (en) | 2003-01-31 |
Family
ID=19050839
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001216353A Pending JP2003031187A (en) | 2001-07-17 | 2001-07-17 | Secondary cell and cell pack |
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| Country | Link |
|---|---|
| JP (1) | JP2003031187A (en) |
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| WO2010032486A1 (en) * | 2008-09-22 | 2010-03-25 | パナソニック株式会社 | Portable electronic device |
| EP2299535A1 (en) * | 2008-11-21 | 2011-03-23 | Panasonic Corporation | Battery pack |
| EP2346111A1 (en) * | 2010-01-07 | 2011-07-20 | Siemens Aktiengesellschaft | Electrochemical energy storage device, in particular lithium-ion energy storage device |
| JP2011258481A (en) * | 2010-06-11 | 2011-12-22 | Hitachi Ltd | Lithium ion battery |
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| CN105958135A (en) * | 2016-06-20 | 2016-09-21 | 宁德时代新能源科技股份有限公司 | Secondary battery |
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| CN105958135A (en) * | 2016-06-20 | 2016-09-21 | 宁德时代新能源科技股份有限公司 | Secondary battery |
| US10505239B2 (en) | 2016-09-16 | 2019-12-10 | Toyota Jidosha Kabushiki Kaisha | Battery pack |
| US10424768B2 (en) | 2016-09-16 | 2019-09-24 | Toyota Jidosha Kabushiki Kaisha | Battery pack |
| CN111684619A (en) * | 2018-02-05 | 2020-09-18 | 第一工业制药株式会社 | Battery holder and battery pack |
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| DE102019121850A1 (en) * | 2019-08-14 | 2021-02-18 | Carl Freudenberg Kg | Energy storage system |
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| CN116031539A (en) * | 2023-03-30 | 2023-04-28 | 宁德新能源科技有限公司 | Battery and electricity utilization device |
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