JP2004221025A - Battery - Google Patents

Battery Download PDF

Info

Publication number
JP2004221025A
JP2004221025A JP2003010173A JP2003010173A JP2004221025A JP 2004221025 A JP2004221025 A JP 2004221025A JP 2003010173 A JP2003010173 A JP 2003010173A JP 2003010173 A JP2003010173 A JP 2003010173A JP 2004221025 A JP2004221025 A JP 2004221025A
Authority
JP
Japan
Prior art keywords
unit cell
vent
battery
frame
communication space
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
Application number
JP2003010173A
Other languages
Japanese (ja)
Inventor
Tatsuya Kamata
龍也 鎌田
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.)
Maxell Holdings Ltd
Original Assignee
Hitachi Maxell 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 Hitachi Maxell Ltd filed Critical Hitachi Maxell Ltd
Priority to JP2003010173A priority Critical patent/JP2004221025A/en
Publication of JP2004221025A publication Critical patent/JP2004221025A/en
Pending 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

Abstract

<P>PROBLEM TO BE SOLVED: To provide a battery capable of surely discharging gas in the battery to the outside of the battery even if an explosion-proof vent is covered with a resin by molding a frame made of the resin integrally with the battery. <P>SOLUTION: A unit cell 2 has an explosion-proof rupture vent 23, and when pressure in the unit cell 2 exceeds a predetermined value due to a short circuit or the like, the rupture vent 23 discharges the gas in the cell 2. The unit cell 2 is molded integrally with the frame 3 made of a synthetic resin so as to cover the rupture vent 23, and in the frame 3, a communication space 26 is formed at a position facing to a slot 24 of the rupture vent 23. The communication space 26 communicates with the outside of the frame 3. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、携帯電話などの小型電子機器の電源として用いるのに適した、特に薄型のリチウムイオン二次電池などの電池に関する。
【０００２】
【従来の技術】
従来例としては、素電池の周面部に合成樹脂製のフレームを一体成形したものがある（特許文献１参照）。
【０００３】
また、通常、電池では、周面部分などに防爆弁を設けており、短絡や過充電などで電池内の圧力が異常に上昇した場合に、防爆弁（開裂ベント）が破断することで電池内のガスを外部に排出するようにしている（特許文献２参照）。
【０００４】
【特許文献１】
特開２００２−２６０６０９号公報（段落番号００１６、図１）
【特許文献２】
特開平１１−２５９３５号公報（段落番号０００４−０００５、図１）
【０００５】
【発明が解決しようとする課題】
特許文献２の電池では、特許文献１と同様に合成樹脂製のフレームを電池の周面部に一体成形しようとする場合、防爆用の開裂ベントが電池の周面部と一緒に合成樹脂で覆われてしまう。この結果、前記樹脂が邪魔になって素電池内のガスを電池外へ排出できなくなるところに問題がある。
【０００６】
また、薄型電池では、小型化のために部品点数を少なくする必要がある。
【０００７】
本発明の目的は、樹脂製のフレームを電池に一体成形したことで、防爆用のベントが樹脂で覆われても、電池内のガスを電池外へ排出できる電池を得ることにある。また本発明の目的は、部品点数を少なくして電池の小型化を図ることにある。
【０００８】
【課題を解決するための手段】
本発明が対象とする電池は、図２に示すごとく、素電池２が、当該素電池２内の圧力が所定値を超えた場合に素電池２内のガスを排出するベント２３を有しており、前記ベント２３を覆うように樹脂製のフレーム３が素電池２に一体成形される。本発明は、前記フレーム３が、前記ベント２３のガス排出部２４に対面する連通空間２６を設けてあり、前記連通空間２６がフレーム３外と連通していることを特徴とするものである。
【０００９】
ここでの素電池２は、リチウムイオン二次電池や一次電池などが該当する。前記樹脂は、ポリアミド樹脂（ナイロン）やポリウレタン樹脂やポリカーボネート樹脂（ＰＣ）やアクリロニトリルブタジエンスチレン樹脂（ＡＢＳ）などが該当する。
【００１０】
詳しくは、図２に示すごとく、ベント２３が開裂部２５を有しており、ベント２３の開裂部２５の周縁が肉薄状に形成されており、素電池２内の圧力が所定値を越えた場合に、開裂部２５の周縁が破断するようになっている。
【００１１】
また、図２に示すごとく、ベント２３と、連通空間２６との間に絶縁板２２を設けたものとすることができる。
【００１２】
【発明の作用効果】
本発明によれば、ベント２３のガス排出部２４に対面する連通空間２６がフレーム３に設けられることにより、フレーム３を素電池２に一体成形したことで、そのフレーム３でベント２３が覆われても、素電池２内のガスを電池１外へ排出するための通路（連通空間２６）が確保される。従って、素電池２内の圧力の異常上昇に対する素電池２の防爆機能を確実に得ることができる。
【００１３】
ベント２３と連通空間２６との間に絶縁板２２を設けると、回路基板１３などの絶縁用に設けた絶縁板２２を、ベント２３の防塵や防水などに利用できる。つまり、ベント２３の防塵や防水などのために部品点数を増やさずに済み、ベント２３の防爆機能を確保できながら電池１の小型化が図れる。
【００１４】
【発明の実施の形態】
図１ないし図３は本発明に係る電池を示す。電池１は、図１に示すごとく、矩形薄型に形成された素電池２と、その素電池２の側面に一体成形された合成樹脂製のフレーム３とを有している。
【００１５】
素電池２は、充放電が可能なリチウムイオン二次電池であって、外装材としてアルミニウム缶や鉄缶などが使用される。素電池２の前後の側面５・６は上下幅の短い矩形状になっており、素電池２の左右の側面７・８は、上下幅が短いとともに前後に長い矩形状になっている。素電池２の内部には、電極体１０（図２）が電解液と共に液密状に収容される。素電池２の前面５には、図２に示すごとく、負極１１が備えられており、素電池２の後面６には正極（図示せず）が備えられる。
【００１６】
電極体１０は、シート状の正極電極と、シート状の負極電極との間にシート状の絶縁セパレータを挟んで渦巻き状に巻回しており、その状態で断面ほぼ長円形状に押し潰した扁平形状になっている。
【００１７】
素電池２の前側には（図２では上側）、保護回路などを備えた回路基板１３が配置されており、回路基板１３が、リード線などを介して素電池２の負極１１に接続されるとともに、リード線およびポリスイッチ（ＰＴＣ）などを介して素電池２の正極に接続される。
【００１８】
フレーム３は、ポリアミド樹脂や、ポリウレタン樹脂や、ポリカーボネート樹脂や、アクリロニトリルブタジエンスチレン樹脂などの合成樹脂で形成される。そして、フレーム３は、前述の回路基板１３やポリスイッチやリード線などを被覆した状態で、素電池２の前後左右の側面５・６・７・８を覆う四角枠状になっている（図１の状態）。このフレーム３により電池１の強度が向上するとともに、前記回路基板１３などが保護される。
【００１９】
保護回路は、素電池２を過充電や過放電から保護するものである。ポリスイッチは、素電池２の過熱や過電流などによって素電池２の温度が過剰に上昇すると、素電池２に流れる電流を遮断するものである。
【００２０】
回路基板１３の前面には、図２に示すごとく、小型電子機器への電源供給用の正負極の端子１４・１５と、当該小型電子機器とのデータ通信用の端子１６とが設けられる。これに対応して、フレーム３の前面には、前記端子１４・１５・１６をそれぞれ露出させる窓１７・１８・１９が設けられる。
【００２１】
素電池２の外装材の前面は開口しており、その開口が、ポリアミド樹脂などの合成樹脂製の封口体２１で塞がれる。封口体２１の前側には、絶縁板２２が配置されており、絶縁板２２は、絶縁抵抗値が高い絶縁テープで形成される。
【００２２】
封口体２１の左端寄りの位置には、防爆用の開裂ベント２３が設けられる。開裂ベント２３は、前記封口体２１に形成した溝（ガス排出部）２４の底面にドーム状の開裂部２５を設けており、開裂部２５が封口体２１に一体で形成している。開裂部２５の周縁は、肉薄状に形成されており、素電池２内の圧力が所定値を越えると破断する。開裂ベント２３の溝２４の前面は絶縁板２２で蓋がされる。
【００２３】
開裂ベント２３の前側であって、絶縁板２２と回路基板１３との間には、図３に示すごとく、フレーム３を上下方向（図３では左右方向）に貫通して、フレーム３外へ連通する直方体状の連通空間２６が形成される。連通空間２６は、絶縁板２２を介して溝２４に対面しており、絶縁板２２の前面に接するように形成される。つまり、開裂ベント２３と連通空間２６との間に絶縁板２２が配されることになる。
【００２４】
連通空間２６は、図２に示すごとく、左右の幅が開裂ベント２３の左右の幅よりも大きくなっている。つまり、連通空間２６の左右の幅は、開裂ベント２３の左右の幅が５ｍｍ程度に対して６ｍｍ程度になっており、連通空間２６の前後の幅は、開裂ベント２３の前後の幅が３ｍｍ程度に対して４ｍｍ程度になっている。
【００２５】
そして、過充電などによって素電池２内の圧力が所定値を越えると、当該素電池２内の圧力で開裂ベント２３の開裂部２５の周縁が破断し、更にその圧力で開裂ベント２３の前面に接する絶縁板２２が破断する。これにより、素電池２内のガスが、開裂ベント２３および連通空間２６を通って素電池２外へ排出されて、素電池２の外装材の破裂などが防がれる。
【００２６】
次に、前記電池１の製造方法を説明すると、先ず、回路基板１３がリード線などを介して素電池２の正負の極に接続される。この状態で、回路基板１３などと共に素電池２が、図４に示す金型２８・２９内に装着される。
【００２７】
この金型２８・２９への装着時には、下側の金型２９に設けた突起３０が、前述の連通空間２６の形成位置に入り込む（図４の状態）。また、前記窓１７・１８・１９の形成位置には、突起（図示せず）がそれぞれ金型２８・２９に設けられており、この窓形成用の突起が、回路基板１３の端子１４・１５・１６にそれぞれ当接する。前記回路基板１３の端子１４・１５・１６に当接する突起は絶縁材で形成される。
【００２８】
次いで、前記金型２８・２９内に溶融合成樹脂が注入されて固化されることにより、回路基板１３などが前記合成樹脂で被覆されるとともに、その合成樹脂が前述のフレーム３の形状に成形されて、前記連通空間２６を有するとともに前記端子１４・１５・１６が前面に露出する図１の電池１が完成する。
【００２９】
このように、開裂ベント２３の前側に連通空間２６を設けたことで、素電池２内のガスを、開裂ベント２３を介して電池１外へ排出するための通路を確保できて、素電池２内の圧力が異常に上昇した場合の防爆機能を確実に得ることができる。
【００３０】
なお、連通空間２６は、フレーム３の上下面のいずれか一方のみに貫通するものであってもよい。絶縁板２２において、開裂ベント２３の前面に接する部分に貫通孔を設けることで、開裂ベント２３が破断した際に、直ちに素電池２内のガスが前記貫通孔を介して連通空間２６へ排出されるようにしてもよい。フレーム３は、素電池２の前後の側面５・６と、左右の側面７・８の一方のみとを覆うコ字状になっていてもよい。
【００３１】
開裂ベント２３は、開裂部２５に代えて、素電池２内の圧力が所定値を越えると破裂するアルミニウム箔や、素電池２内の圧力が所定値を越えると開く弁などを設けてもよい。回路基板１３は、素電池２の左右の側面７・８や後側面６などに設けてもよく、あるいは設けなくてもよい。素電池２の前側に回路基板１３を配置しない場合には、絶縁板２２を省略することも可能である。
【図面の簡単な説明】
【図１】本発明に係る電池の斜視図である。
【図２】開裂ベントおよび連通空間を示す要部断面図である。
【図３】図２のＡ−Ａ線矢視断面図である。
【図４】フレームを成形する金型の要部を示す断面図である。
【符号の説明】
１ 電池
２ 素電池
３ フレーム
２１ 封口体
２２ 絶縁板
２３ 開裂ベント
２４ 溝
２５ 開裂部
２６ 連通空間[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a battery, such as a thin lithium-ion secondary battery, which is suitable for use as a power source for small electronic devices such as a mobile phone.
[0002]
[Prior art]
As a conventional example, there is one in which a frame made of a synthetic resin is integrally formed on a peripheral surface of a unit cell (see Patent Document 1).
[0003]
Also, batteries usually have an explosion-proof valve on the peripheral surface, etc., and when the pressure inside the battery rises abnormally due to short-circuiting, overcharging, etc., the explosion-proof valve (split vent) breaks, Is discharged to the outside (see Patent Document 2).
[0004]
[Patent Document 1]
JP-A-2002-260609 (paragraph number 0016, FIG. 1)
[Patent Document 2]
JP-A-11-25935 (paragraphs 0004-0005, FIG. 1)
[0005]
[Problems to be solved by the invention]
In the battery of Patent Literature 2, when a frame made of a synthetic resin is to be integrally formed with the peripheral surface of the battery as in Patent Literature 1, the explosion-proof cleavage vent is covered with the synthetic resin together with the peripheral surface of the battery. I will. As a result, there is a problem that the gas in the unit cell cannot be discharged out of the cell because the resin is in the way.
[0006]
Further, in the case of a thin battery, it is necessary to reduce the number of components for miniaturization.
[0007]
An object of the present invention is to obtain a battery that can discharge gas in the battery to the outside of the battery even when the explosion-proof vent is covered with the resin by integrally molding the resin frame with the battery. It is another object of the present invention to reduce the number of parts and downsize the battery.
[0008]
[Means for Solving the Problems]
As shown in FIG. 2, the battery to which the present invention is applied has a vent 23 for discharging gas in the unit cell 2 when the pressure in the unit cell 2 exceeds a predetermined value. The resin frame 3 is integrally formed with the unit cell 2 so as to cover the vent 23. The present invention is characterized in that the frame 3 is provided with a communication space 26 facing the gas discharge portion 24 of the vent 23, and the communication space 26 communicates with the outside of the frame 3.
[0009]
The unit cell 2 here corresponds to a lithium ion secondary battery, a primary battery, or the like. The resin corresponds to a polyamide resin (nylon), a polyurethane resin, a polycarbonate resin (PC), an acrylonitrile butadiene styrene resin (ABS), or the like.
[0010]
Specifically, as shown in FIG. 2, the vent 23 has a cleavage portion 25, and the periphery of the cleavage portion 25 of the vent 23 is formed to be thin, so that the pressure in the unit cell 2 exceeds a predetermined value. In such a case, the periphery of the cleavage portion 25 is broken.
[0011]
Further, as shown in FIG. 2, an insulating plate 22 may be provided between the vent 23 and the communication space 26.
[0012]
Effects of the Invention
According to the present invention, since the communication space 26 facing the gas discharge portion 24 of the vent 23 is provided in the frame 3, the frame 3 is integrally formed with the unit cell 2, so that the frame 3 covers the vent 23. However, a passage (communication space 26) for discharging the gas inside the unit cell 2 to the outside of the cell 1 is secured. Therefore, the explosion-proof function of the unit cell 2 against the abnormal increase in the pressure in the unit cell 2 can be reliably obtained.
[0013]
When the insulating plate 22 is provided between the vent 23 and the communication space 26, the insulating plate 22 provided for insulation, such as the circuit board 13, can be used for dustproof and waterproof of the vent 23. That is, the number of components does not need to be increased for dust prevention and waterproofing of the vent 23, and the size of the battery 1 can be reduced while ensuring the explosion-proof function of the vent 23.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
1 to 3 show a battery according to the present invention. As shown in FIG. 1, the battery 1 has a unit cell 2 formed in a rectangular thin shape, and a synthetic resin frame 3 integrally formed on a side surface of the unit cell 2.
[0015]
The unit cell 2 is a chargeable / dischargeable lithium ion secondary battery, and an aluminum can or an iron can is used as an exterior material. The front and rear side surfaces 5 and 6 of the unit cell 2 have a rectangular shape with a short upper and lower width, and the left and right side surfaces 7 and 8 of the unit cell 2 have a rectangular shape with a short upper and lower width and a long front and rear. Inside the unit cell 2, the electrode body 10 (FIG. 2) is housed in a liquid-tight state together with the electrolytic solution. As shown in FIG. 2, the front surface 5 of the unit cell 2 is provided with a negative electrode 11, and the rear surface 6 of the unit cell 2 is provided with a positive electrode (not shown).
[0016]
The electrode body 10 is spirally wound with a sheet-shaped insulating separator interposed between a sheet-shaped positive electrode and a sheet-shaped negative electrode, and in this state, the flattened section is crushed into a substantially elliptical cross section. It has a shape.
[0017]
On the front side of the unit cell 2 (upper side in FIG. 2), a circuit board 13 provided with a protection circuit and the like is arranged, and the circuit board 13 is connected to the negative electrode 11 of the unit cell 2 via a lead wire or the like. At the same time, it is connected to the positive electrode of the unit cell 2 via a lead wire and a polyswitch (PTC).
[0018]
The frame 3 is formed of a synthetic resin such as a polyamide resin, a polyurethane resin, a polycarbonate resin, and an acrylonitrile butadiene styrene resin. The frame 3 has a rectangular frame shape covering the front, rear, left and right side surfaces 5, 6, 7, and 8 of the unit cell 2 in a state where the frame 3 is covered with the circuit board 13, the polyswitch, the lead wires, and the like (FIG. 1). The frame 3 improves the strength of the battery 1 and protects the circuit board 13 and the like.
[0019]
The protection circuit protects the unit cell 2 from overcharge or overdischarge. The polyswitch cuts off the current flowing through the unit cell 2 when the temperature of the unit cell 2 excessively rises due to overheating or overcurrent of the unit cell 2.
[0020]
As shown in FIG. 2, on the front surface of the circuit board 13, positive and negative terminals 14 and 15 for supplying power to the small electronic device and terminals 16 for data communication with the small electronic device are provided. Correspondingly, windows 17, 18, and 19 for exposing the terminals 14, 15, and 16 are provided on the front surface of the frame 3.
[0021]
The front surface of the exterior material of the unit cell 2 is open, and the opening is closed by a sealing body 21 made of a synthetic resin such as a polyamide resin. An insulating plate 22 is arranged on the front side of the sealing body 21, and the insulating plate 22 is formed of an insulating tape having a high insulation resistance value.
[0022]
An explosion-proof cleavage vent 23 is provided at a position near the left end of the sealing body 21. The cleavage vent 23 has a dome-shaped cleavage portion 25 on the bottom surface of a groove (gas discharge portion) 24 formed in the sealing body 21, and the cleavage portion 25 is formed integrally with the sealing body 21. The peripheral edge of the cleavage portion 25 is formed in a thin shape, and breaks when the pressure in the unit cell 2 exceeds a predetermined value. The front surface of the groove 24 of the cleavage vent 23 is covered with an insulating plate 22.
[0023]
On the front side of the cleavage vent 23, between the insulating plate 22 and the circuit board 13, as shown in FIG. 3, the frame 3 penetrates in the up-down direction (left-right direction in FIG. 3) and communicates outside the frame 3. A rectangular parallelepiped communication space 26 is formed. The communication space 26 faces the groove 24 via the insulating plate 22 and is formed so as to be in contact with the front surface of the insulating plate 22. That is, the insulating plate 22 is disposed between the cleavage vent 23 and the communication space 26.
[0024]
As shown in FIG. 2, the width of the communication space 26 on the left and right is larger than the width on the left and right of the cleavage vent 23. In other words, the left and right width of the communication space 26 is about 6 mm compared to the left and right width of the cleavage vent 23 of about 5 mm, and the front and rear width of the communication space 26 is about 3 mm before and after the cleavage vent 23. Is about 4 mm.
[0025]
When the pressure in the unit cell 2 exceeds a predetermined value due to overcharging or the like, the periphery of the cleavage portion 25 of the cleavage vent 23 is broken by the pressure in the unit cell 2, and furthermore, the pressure is applied to the front of the cleavage vent 23. The contacting insulating plate 22 breaks. As a result, the gas in the unit cell 2 is discharged to the outside of the unit cell 2 through the cleavage vent 23 and the communication space 26, and the rupture of the exterior material of the unit cell 2 is prevented.
[0026]
Next, a method of manufacturing the battery 1 will be described. First, the circuit board 13 is connected to the positive and negative poles of the unit cell 2 via a lead wire or the like. In this state, the unit cell 2 is mounted together with the circuit board 13 and the like in the molds 28 and 29 shown in FIG.
[0027]
At the time of attachment to the molds 28 and 29, the projections 30 provided on the lower mold 29 enter the formation positions of the communication spaces 26 (the state of FIG. 4). Projections (not shown) are provided on the molds 28 and 29 at the positions where the windows 17, 18 and 19 are formed, and the projections for forming the windows are provided on the terminals 14 and 15 of the circuit board 13.・ Abut against 16 respectively. The protrusions that contact the terminals 14, 15, 16 of the circuit board 13 are formed of an insulating material.
[0028]
Next, by injecting and solidifying the molten synthetic resin into the molds 28 and 29, the circuit board 13 and the like are covered with the synthetic resin, and the synthetic resin is formed into the shape of the frame 3 described above. Thus, the battery 1 shown in FIG. 1 having the communication space 26 and the terminals 14, 15, 16 exposed on the front surface is completed.
[0029]
By providing the communication space 26 in front of the cleavage vent 23 in this manner, a passage for discharging gas inside the unit cell 2 to the outside of the battery 1 through the cleavage vent 23 can be secured, and the unit cell 2 An explosion-proof function can be reliably obtained when the internal pressure rises abnormally.
[0030]
The communication space 26 may penetrate only one of the upper and lower surfaces of the frame 3. By providing a through hole in the insulating plate 22 at a portion in contact with the front surface of the cleavage vent 23, when the cleavage vent 23 breaks, the gas in the unit cell 2 is immediately discharged to the communication space 26 via the through hole. You may make it so. The frame 3 may have a U-shape that covers the front and rear side surfaces 5 and 6 of the unit cell 2 and only one of the left and right side surfaces 7 and 8.
[0031]
Instead of the cleavage portion 25, the cleavage vent 23 may be provided with an aluminum foil that bursts when the pressure in the unit cell 2 exceeds a predetermined value, a valve that opens when the pressure in the unit cell 2 exceeds a predetermined value, or the like. . The circuit board 13 may or may not be provided on the left and right side surfaces 7 and 8 and the rear side surface 6 of the unit cell 2. When the circuit board 13 is not arranged in front of the unit cell 2, the insulating plate 22 can be omitted.
[Brief description of the drawings]
FIG. 1 is a perspective view of a battery according to the present invention.
FIG. 2 is a sectional view of a main part showing a cleavage vent and a communication space.
FIG. 3 is a sectional view taken along line AA of FIG. 2;
FIG. 4 is a sectional view showing a main part of a mold for molding a frame.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Battery 2 Unit cell 3 Frame 21 Sealing body 22 Insulating plate 23 Cleavage vent 24 Groove 25 Cleaved part 26 Communication space

Claims (3)

素電池が、当該素電池内の圧力が所定値を超えた場合に素電池内のガスを排出するベントを有しており、
前記ベントを覆うように樹脂製のフレームが前記素電池に一体成形される電池であって、
前記フレームは、前記ベントのガス排出部に対面する連通空間が設けられており、
前記連通空間がフレーム外と連通していることを特徴とする電池。The unit cell has a vent for discharging gas in the unit cell when the pressure in the unit cell exceeds a predetermined value,
A battery in which a resin frame is integrally formed with the unit cell so as to cover the vent,
The frame is provided with a communication space facing the gas discharge portion of the vent,
The battery wherein the communication space communicates with the outside of the frame. 素電池が、当該素電池の外装体の開口を塞ぐ樹脂製の封口体を有しており、
ベントが、前記封口体に一体で形成された開裂部を有して、当該開裂部の周縁が肉薄状に形成されており、
素電池内の圧力が所定値を越えた場合に、開裂部の周縁が破断する請求項１記載の電池。The unit cell has a resin sealing body that closes an opening of an exterior body of the unit cell,
The vent has a cleavage portion formed integrally with the sealing body, and the periphery of the cleavage portion is formed to be thin,
2. The battery according to claim 1, wherein when the pressure in the unit cell exceeds a predetermined value, the periphery of the cleavage portion is broken. ベントと、連通空間との間に絶縁板を設けた請求項１又は２記載の電池。3. The battery according to claim 1, wherein an insulating plate is provided between the vent and the communication space.
JP2003010173A 2003-01-17 2003-01-17 Battery Pending JP2004221025A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2003010173A JP2004221025A (en) 2003-01-17 2003-01-17 Battery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003010173A JP2004221025A (en) 2003-01-17 2003-01-17 Battery

Publications (1)

Publication Number Publication Date
JP2004221025A true JP2004221025A (en) 2004-08-05

Family

ID=32899457

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2003010173A Pending JP2004221025A (en) 2003-01-17 2003-01-17 Battery

Country Status (1)

Country Link
JP (1) JP2004221025A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006079858A (en) * 2004-09-07 2006-03-23 Nissan Motor Co Ltd Secondary battery
EP1657765A2 (en) * 2004-11-10 2006-05-17 LG Electronics Inc. Safety device of battery
JP2006128062A (en) * 2004-10-28 2006-05-18 Samsung Sdi Co Ltd Secondary battery
US9997747B2 (en) 2013-08-05 2018-06-12 Samsung Sdi Co., Ltd. Rechargeable battery having upper insulator member

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006079858A (en) * 2004-09-07 2006-03-23 Nissan Motor Co Ltd Secondary battery
JP2006128062A (en) * 2004-10-28 2006-05-18 Samsung Sdi Co Ltd Secondary battery
JP4603906B2 (en) * 2004-10-28 2010-12-22 三星エスディアイ株式会社 Secondary battery
EP1657765A2 (en) * 2004-11-10 2006-05-17 LG Electronics Inc. Safety device of battery
EP1657765A3 (en) * 2004-11-10 2007-05-23 LG Electronics Inc. Safety device of battery
US7662506B2 (en) 2004-11-10 2010-02-16 Lg Electronics Inc. Safety device of battery
US9997747B2 (en) 2013-08-05 2018-06-12 Samsung Sdi Co., Ltd. Rechargeable battery having upper insulator member

Similar Documents

Publication Publication Date Title
KR100812306B1 (en) Battery pack
KR100686800B1 (en) Secondary battery
EP1995803B1 (en) Secondary battery
US8980466B2 (en) Packing structure for lithium ion polymer battery
US7592096B2 (en) Lithium ion secondary battery
US7635535B2 (en) Battery pack comprising a battery and a terminal unit
KR20060032591A (en) Lithium ion batteries
US20100143793A1 (en) Battery Pack
JP5517165B2 (en) Sealed battery
JP4979216B2 (en) Secondary battery pack case
KR100601502B1 (en) Pack secondary battery
JP4548663B2 (en) Battery pack
JP2004362874A (en) Battery pack
JP2004221025A (en) Battery
JP2003282039A (en) Battery pack
JP4841119B2 (en) Pack battery and manufacturing method thereof
JP2004303625A (en) Battery pack and manufacturing method thereof
KR100571236B1 (en) Secondary Battery
JP4082506B2 (en) Battery pack manufacturing method
JP4162212B2 (en) battery
JP2009043497A (en) Battery pack
KR20040110332A (en) Secondary battery
KR100580768B1 (en) Plastic molding type secondary battery
KR20110070443A (en) Battery pack
JP2004221026A (en) Manufacturing method of battery pack

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20050418

RD02 Notification of acceptance of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7422

Effective date: 20061103

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20070607

RD02 Notification of acceptance of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7422

Effective date: 20071108

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20080723

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20081203