JP5332397B2 - Battery system - Google Patents

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JP5332397B2
JP5332397B2 JP2008213234A JP2008213234A JP5332397B2 JP 5332397 B2 JP5332397 B2 JP 5332397B2 JP 2008213234 A JP2008213234 A JP 2008213234A JP 2008213234 A JP2008213234 A JP 2008213234A JP 5332397 B2 JP5332397 B2 JP 5332397B2
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battery
gas discharge
gas
discharge valve
internal pressure
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JP2010049942A (en
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伸介 吉竹
勝彦 岡本
丈 佐々木
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GS Yuasa International Ltd
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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、電池システムに関する。   The present invention relates to a battery system.

近年、電気自動車やハイブリッド自動車などに搭載される電池の需要が高まっているが、これらの用途に用いる電池には、電池の内部でガスを発生させるものがある。たとえば、リチウムイオン電池では、電池が異常発熱すると、電池内部でガスが発生して電池内部の圧力が極端に上昇し、電池が破裂するおそれがある。このような危険な事態を回避するため、電池内部でガスが発生しうる電池には、電池内で発生したガスを電池外に排出させるものとして、例えばガス排出弁が設けられている。   In recent years, there is an increasing demand for batteries mounted on electric vehicles, hybrid vehicles, and the like. Some batteries used in these applications generate gas inside the batteries. For example, in a lithium ion battery, when the battery abnormally generates heat, gas is generated inside the battery, the pressure inside the battery increases extremely, and the battery may burst. In order to avoid such a dangerous situation, a battery that can generate gas inside the battery is provided with, for example, a gas discharge valve for discharging the gas generated in the battery to the outside of the battery.

しかしながら、このガス排出弁から排出されるガスが、車内に漏れた場合には搭乗者の健康を害するおそれがある。そこで、ガス排出弁から排出されるガスを搭乗者に危害を与えないところに誘導するためのガス排出管を備える電池が、提案されている（特許文献１を参照）。
特開２００２−２１６７３１公報（第６頁、第２図） However, if the gas discharged from the gas discharge valve leaks into the vehicle, the passenger's health may be impaired. Therefore, a battery having a gas discharge pipe for guiding the gas discharged from the gas discharge valve to a place where the passenger is not harmed has been proposed (see Patent Document 1).
JP 2002-216731 A (6th page, FIG. 2)

上記特許文献１には、上面にガス排出口と、ガス排出口から排出されるガスを排出するガス排出通路とを備えた単電池を複数接続した組電池が記載されている。この組電池においては、単電池のガス排出部材と、これに隣接する単電池のガス排出部材とを互いに連結することにより、単電池の厚み方向と平行な方向に、ガス排出通路が設けられている。このガス排出通路を構成するガス排出部材は、単電池のガス排出口から上方に突出する突管部と、単電池の厚み方向に平行な方向に設けられた連結部とからなる。   Patent Document 1 describes an assembled battery in which a plurality of unit cells each having a gas discharge port and a gas discharge passage for discharging gas discharged from the gas discharge port are connected to the upper surface. In this assembled battery, a gas discharge passage is provided in a direction parallel to the thickness direction of the single cell by connecting the gas discharge member of the single cell and the gas discharge member of the single cell adjacent thereto. Yes. The gas discharge member that constitutes the gas discharge passage includes a protruding tube portion that protrudes upward from the gas discharge port of the unit cell, and a connecting portion that is provided in a direction parallel to the thickness direction of the unit cell.

上記特許文献１に記載の組電池において、ガス排出部材は、その突管部を単電池のガス排出口に接合することにより取り付けられており、その連結部を隣接するガス排出部材の連結部に嵌め込むことで連結される。したがって、ガス排出部材の突管部と単電池のガス排出口との接合部分、および、隣接するガス排出部材との連結部分を強固に固着しておかないと、単電池が異常発熱して膨らんだ場合やガス排出口からガスが勢いよく噴出した場合などに前記接合部分や前記連結部分がはずれて、ガス漏れが生じるおそれがある。   In the assembled battery described in Patent Document 1, the gas discharge member is attached by joining the projecting tube portion to the gas discharge port of the unit cell, and the connection portion is connected to the connection portion of the adjacent gas discharge member. Connected by fitting. Therefore, if the joint part between the protruding part of the gas discharge member and the gas discharge port of the unit cell and the connection part between the adjacent gas discharge member are not firmly fixed, the unit cell will abnormally generate heat and swell. In such a case, or when the gas is ejected vigorously from the gas discharge port, the joining portion or the connecting portion may be disconnected, and gas leakage may occur.

本発明は上記のような事情に基づいて完成されたものであって、電池から外れにくいガス排出管を備えた電池システムを提供することを目的とする。   This invention is completed based on the above situations, Comprising: It aims at providing the battery system provided with the gas exhaust pipe which is hard to remove | deviate from a battery.

上記課題を解決するものとして本発明は、ガス排出弁を設けた電池と、前記電池の内圧が上昇したときに前記ガス排出弁から排出されるガスを排出するガス排出管とを備え、前記電池の内圧の上昇により当該電池が膨れることで前記電池と前記ガス排出管との押し合う力が増加する電池システムであって、前記ガス排出管を、前記電池の内圧が上昇したときに前記ガス排出管と押し合う電池と、この電池及び前記ガス排出管以外の別の部材との間に配するとともに、当該電池と当該別の部材の間においては当該電池にのみ接続し、前記電池の内圧が上昇したときに、前記ガス排出管が、前記電池と前記別の部材とから押されるようにしたことを特徴とする電池システムである。
また、本発明は、ガス排出弁を設けた電池と、前記電池の内圧が上昇したときに前記ガス排出弁から排出されるガスを排出するガス排出管とを備え、前記電池の内圧の上昇により当該電池が膨れることで前記電池と前記ガス排出管との押し合う力が増加する電池システムであって、前記電池は電池ケースを備え、前記電池ケースは面積が最も大きい最大面と、前記最大面よりも面積が小さい面であるとともに前記ガス排出弁を設けたガス排出弁設置面とを備え、前記電池の内圧が上昇したときの前記最大面における膨れを抑制する抑制部材を、前記電池ケースの周囲に設け、かつ、前記電池の内圧が上昇したときに、前記電池ケースの前記ガス排出弁設置面と前記ガス排出管との押し合う力が増加し、前記電池は、前記電池ケースの前記ガス排出弁設置面と、当該ガス排出弁設置面に対向する外側面とに、別の電池と電気的に接続可能な接続端子を備え、前記ガス排出管は、前記ガス排出弁に接続されるとともに、その内部に前記ガス排出弁からのガスが通る第１の排気通路を有する接続部と、前記接続部から連設されて、その内部に前記第１の排気通路と交差する方向に連通する第２の排気通路を有するとともに、別の電池のガス排出管と連結される連結部とからなり、前記電池を複数個、前記接続端子を介して接続することにより、前記ガス排出管の接続部を、前記電池ケースの前記ガス排出弁設置面と、隣接する電池の前記電池ケースの外側面との間に配したことを特徴とする電池システムである。
The present invention In order to solve the above problems, comprises a battery having a gas discharge valve, and a gas discharge pipe for discharging the gas pressure of the battery is discharged from the gas discharge valve upon rising, the battery A battery system in which the force of pressing the battery and the gas exhaust pipe increases due to the battery expanding due to an increase in the internal pressure of the gas, wherein the gas exhaust pipe is connected to the gas exhaust pipe when the internal pressure of the battery increases. The battery is pressed between the battery and another member other than the battery and the gas exhaust pipe, and only connected to the battery between the battery and the other member. The battery system is characterized in that the gas discharge pipe is pushed from the battery and the another member when it is raised .
Further, the present invention includes a battery provided with a gas discharge valve, and a gas discharge pipe for discharging gas discharged from the gas discharge valve when the internal pressure of the battery rises, and by increasing the internal pressure of the battery A battery system in which a pressing force between the battery and the gas exhaust pipe increases as the battery swells, the battery including a battery case, the battery case having a largest area, and the largest surface. A suppression member for suppressing swelling at the maximum surface when the internal pressure of the battery rises, and having a gas discharge valve installation surface provided with the gas discharge valve. When the internal pressure of the battery rises when it is provided around the battery, the force with which the gas discharge valve installation surface of the battery case and the gas discharge pipe are pressed increases, and the battery has the gas in the battery case. A connection terminal electrically connectable to another battery is provided on the outlet valve installation surface and the outer surface facing the gas exhaust valve installation surface, and the gas exhaust pipe is connected to the gas exhaust valve. A connecting portion having a first exhaust passage through which gas from the gas exhaust valve passes, and a connecting portion provided continuously from the connecting portion in a direction intersecting the first exhaust passage. And a connecting portion connected to a gas discharge pipe of another battery, and connecting the plurality of batteries via the connection terminal, thereby connecting the connection portion of the gas discharge pipe. The battery system is arranged between the gas discharge valve installation surface of the battery case and the outer surface of the battery case of an adjacent battery.

ところで、ガス排出弁に取り付けるガス排出管の位置ずれを防止する方法として、隣接しあう電池の外壁面の間にガス排出管を圧入することにより、ガス排出管を固定することが考えられる。ガス排出管などのガス排出部材の材料としては、合成樹脂を用いることが一般的であるが、合成樹脂は、長時間強い圧力がかかっている状態におくと、ゆっくりと変形する性質（クリープ現象という）を有しているため、電池が異常発熱して膨らむまでの間に、ガス排出管が変形してしまう可能性がある。このようにしてガス排出管が変形すると、電池の内圧が異常に上昇して電池が変形したりガス排出弁からガスが勢いよく噴出した際に、ガス排出管がガス排出弁から外れたり、ガス排出管の位置ずれが生じることが懸念される。   By the way, as a method of preventing the displacement of the gas exhaust pipe attached to the gas exhaust valve, it is conceivable to fix the gas exhaust pipe by press-fitting the gas exhaust pipe between the outer wall surfaces of adjacent batteries. Synthetic resin is generally used as a material for gas exhaust members such as gas exhaust pipes, but synthetic resin has a property of slowly deforming when subjected to strong pressure for a long time (creep phenomenon). Therefore, there is a possibility that the gas exhaust pipe is deformed before the battery is abnormally heated and expands. When the gas exhaust pipe is deformed in this way, when the internal pressure of the battery rises abnormally and the battery is deformed or gas is ejected vigorously from the gas exhaust valve, the gas exhaust pipe may come off from the gas exhaust valve, There is concern about the displacement of the discharge pipe.

上記したように、ガス排出管がガス排出弁から外れ易いのは、電池の内圧が異常に上昇して電池が変形したりガス排出弁が開いてガスが勢いよく噴出したときである。
そこで、本発明では電池の内圧が上昇したときに電池が膨れることによって、電池とガス排出管とが押し合う力が増加する構成とした。
従って、本発明によれば、ガス排出管がガス排出弁から外れやすくなるときと同時、あるいは、その直前に、電池によるガス排出管の圧迫力が電池の膨れによって強くなる。つまり、ガス排出管を強く抑える必要が生じた場合のみに限定して、ガス排出管を圧迫力が強くなって、接続されている電池に強固に固定される。したがって、電池の内圧上昇が生じていない通常の状態では、ガス排出管の電池による圧迫強度を弱く設定することができる。
その結果、上記のクリープ現象は抑制され、ガス排出管が大きく変形するのを防止することができ、これによりガス排出弁からガスが噴出した場合であっても、ガス排出管が電池から外れ難くすることができるのである。 As described above, the gas discharge pipe is easily detached from the gas discharge valve when the internal pressure of the battery is abnormally increased and the battery is deformed or the gas discharge valve is opened and gas is ejected vigorously.
Therefore, in the present invention, when the internal pressure of the battery rises, the battery swells to increase the force with which the battery and the gas discharge pipe are pressed.
Therefore, according to the present invention, at the same time as or immediately before the gas discharge pipe is easily detached from the gas discharge valve, the pressure of the gas discharge pipe by the battery is increased by the swelling of the battery. That is, only when it is necessary to strongly suppress the gas exhaust pipe, the gas exhaust pipe is strongly fixed to the connected battery with a strong compressive force. Therefore, in a normal state where the internal pressure of the battery does not increase, the compression strength of the gas discharge pipe by the battery can be set weak.
As a result, the above-described creep phenomenon is suppressed, and the gas exhaust pipe can be prevented from being greatly deformed. Thus, even when gas is ejected from the gas exhaust valve, the gas exhaust pipe is not easily detached from the battery. It can be done.

本発明において、前記ガス排出管を、前記電池の内圧が上昇したときに前記ガス排出管と押し合う電池と、この電池及び前記ガス排出管以外の別の部材との間に配して、前記電池の内圧が上昇したときに、前記ガス排出管が、前記電池と前記別の部材とから押されるような構成とすると、電池の内圧が上昇したときに、ガス排出管が電池と別の部材との間に強固に挟まれて固定されるので好ましい。 In the present invention, the gas exhaust pipe is disposed between a battery that presses against the gas exhaust pipe when the internal pressure of the battery increases, and another member other than the battery and the gas exhaust pipe, When the internal pressure of the battery is increased, the gas exhaust pipe is pushed from the battery and the separate member. When the internal pressure of the battery is increased, the gas exhaust pipe is separate from the battery. Is preferably sandwiched and fixed between the two.

前記電池は電池ケースを備え、前記電池ケースは面積が最も大きい最大面と、前記最大面よりも面積が小さい面であるとともに前記ガス排出弁を設けたガス排出弁設置面とを備え、前記電池の内圧が上昇したときの前記最大面における膨れを抑制する抑制部材を、前記電池ケースの周囲に設け、かつ、前記電池の内圧が上昇したときに、前記電池ケースの前記ガス排出弁設置面と前記ガス排出管との押し合う力が増加する構成としてもよい。   The battery includes a battery case, and the battery case includes a maximum surface having the largest area and a gas discharge valve installation surface having a surface smaller than the maximum surface and provided with the gas discharge valve. A suppression member that suppresses swelling at the maximum surface when the internal pressure of the battery rises is provided around the battery case, and when the internal pressure of the battery rises, the gas discharge valve installation surface of the battery case It is good also as a structure which the force pressed against the said gas exhaust pipe increases.

ガス排出弁から排出されるガスを排気するためのガス排出管はガス排出弁を設置したガス排出弁設置面から電池ケースの外側方向へ突出させて設けられるため、ガス排出弁を電池ケースの面積の大きい面に設ける場合、広い収納スペースが必要となる。一方、上記構成のように、ガス排出弁を電池ケースの面積の小さい面に設けると、省スペースとすることができる。
しかしながら、通常、電池の内圧が上昇した際の電池の膨れは、面積の大きい面で大きく、面積の小さい面では小さいので、ガス排出弁を電池ケースの面積の小さい面に設けた構成とすると、電池の内圧が上昇して電池が膨れたときに、電池とガス排出管とが押し合う力が増加し難くなることが懸念される。
そこで、上記構成においては、電池ケースの最大面における膨れを抑制する抑制部材を電池ケースの周囲に設けることにより、電池ケースの最大面における膨れを防止して、面積の小さい面が膨れ易い構成とした。その結果、上記構成によれば、電池とガス排出管とが押し合う力を充分に増加させることができる。 The gas discharge pipe for exhausting the gas discharged from the gas discharge valve is provided to protrude outward from the battery case installation surface where the gas discharge valve is installed. When it is provided on a large surface, a large storage space is required. On the other hand, when the gas discharge valve is provided on the surface of the battery case having a small area as in the above configuration, the space can be saved.
However, normally, the swelling of the battery when the internal pressure of the battery is increased is large on the surface with a large area and small on the surface with a small area, so when the gas discharge valve is provided on the surface with a small area of the battery case, When the internal pressure of the battery rises and the battery swells, there is a concern that the force with which the battery and the gas discharge pipe are pressed becomes difficult to increase.
Therefore, in the above configuration, a suppression member that suppresses swelling on the maximum surface of the battery case is provided around the battery case to prevent swelling on the maximum surface of the battery case, and a surface with a small area is likely to swell. did. As a result, according to the above configuration, the force with which the battery and the gas discharge pipe are pressed can be sufficiently increased.

前記電池は、前記電池ケースの前記ガス排出弁設置面と、当該ガス排出弁設置面に対向する外側面とに、別の電池と電気的に接続可能な接続端子を備え、前記ガス排出管は、前記ガス排出弁に接続されるとともに、その内部に前記ガス排出弁からのガスが通る第１の排気通路を有する接続部と、前記接続部から連設されて、その内部に前記第１の排気通路と交差する方向に連通する第２の排気通路を有するとともに、別の電池のガス排出管と連結される連結部とからなり、前記電池を複数個、前記接続端子を介して接続することにより、前記ガス排出管の接続部を、前記電池ケースの前記ガス排出弁設置面と、隣接する電池の前記電池ケースの外側面との間に配する構成としてもよい。   The battery includes a connection terminal that can be electrically connected to another battery on the gas discharge valve installation surface of the battery case and an outer surface facing the gas discharge valve installation surface, and the gas discharge pipe includes A connection part connected to the gas discharge valve and having a first exhaust passage through which the gas from the gas discharge valve passes, and connected to the connection part, and the first A second exhaust passage communicating with the exhaust passage in a direction intersecting the exhaust passage, and a connecting portion connected to a gas discharge pipe of another battery, wherein a plurality of the batteries are connected via the connection terminal. Accordingly, the connection part of the gas discharge pipe may be arranged between the gas discharge valve installation surface of the battery case and the outer surface of the battery case of the adjacent battery.

このような構成とすると、電池の内圧上昇により電池が膨らんだ際に、当該膨れた電池の電池ケースのガス排出弁設置面と、隣接する電池の電池ケースの外壁面との間にガス排出管が挟まれて、強固に固定されるため、ガス排出管を固定するための別部材が不要である。
さらに、上記構成では、複数の電池を接続する接続端子が、ガス排出弁設置面に設けられているから、ガス排出管の接続部が挟まれているスペースに、電池の接続端子と、この端子に接続される隣接する電池の接続端子とが配されるため、接続端子のためのスペースを別途設ける必要がないので、省スペースとすることができ、好ましい。 With such a configuration, when the battery expands due to an increase in the internal pressure of the battery, the gas discharge pipe is provided between the gas discharge valve installation surface of the battery case of the expanded battery and the outer wall surface of the battery case of the adjacent battery. Is sandwiched and firmly fixed, so that a separate member for fixing the gas exhaust pipe is unnecessary.
Furthermore, in the above configuration, since the connection terminal for connecting a plurality of batteries is provided on the gas discharge valve installation surface, the connection terminal of the battery and the terminal are connected to the space where the connection part of the gas discharge pipe is sandwiched. Since the connection terminals of the adjacent batteries connected to the battery are arranged, it is not necessary to provide a separate space for the connection terminals, which can save space and is preferable.

本発明によれば、電池から外れにくいガス排出管を備えた電池システムを提供することができる。   ADVANTAGE OF THE INVENTION According to this invention, the battery system provided with the gas exhaust pipe which cannot be easily removed from a battery can be provided.

＜実施形態１＞
本発明を電気自動車に搭載するリチウムイオン電池に適用した実施形態１を図１ないし図６によって説明する。
図１に示すように、本実施形態の組電池１０は、略直方体状をなしており、組電池１０の長手方向に対して平行に配した樹脂製の２枚の側板１１の間に、樹脂枠１２で取り囲まれた電池列２０を、５列並列してなる。 <Embodiment 1>
A first embodiment in which the present invention is applied to a lithium ion battery mounted on an electric vehicle will be described with reference to FIGS.
As shown in FIG. 1, the assembled battery 10 of the present embodiment has a substantially rectangular parallelepiped shape, and a resin is interposed between two resin side plates 11 arranged in parallel to the longitudinal direction of the assembled battery 10. Five battery rows 20 surrounded by the frame 12 are arranged in parallel.

詳しくは、本実施形態の組電池１０においては、２枚の絶縁フィルム１３，１３の間に挟まれた電池列２０が、隣接しあう電池列２０の間、および、隣接する側板１１との間に、樹脂製のスペーサー１８を挟んだ状態で並列している（図１及び図２を参照）。電池列２０の間に挟まれる絶縁フィルム１３及びスペーサー１８には、各単電池３０に設けたガス排出管３５の連結部３８（詳細は後述する）を挿通させる挿通孔（図示せず）がそれぞれ設けられている。   Specifically, in the assembled battery 10 of the present embodiment, the battery row 20 sandwiched between the two insulating films 13 and 13 is between the adjacent battery rows 20 and between the adjacent side plates 11. Are arranged in parallel with a resin spacer 18 in between (see FIGS. 1 and 2). The insulating film 13 and the spacer 18 sandwiched between the battery rows 20 have insertion holes (not shown) through which connecting portions 38 (details will be described later) of the gas discharge pipes 35 provided in the single cells 30 are inserted. Is provided.

スペーサー１８の上端および下端には、組電池１０の上面及び下面に配された固定部材１４を係止するための係止部１９が突設されている。なお、スペーサー１８の上端に設けた係止部１９は前記挿通孔のすぐ上に位置している。   Locking portions 19 for locking the fixing members 14 disposed on the upper surface and the lower surface of the assembled battery 10 protrude from the upper and lower ends of the spacer 18. The locking portion 19 provided at the upper end of the spacer 18 is located immediately above the insertion hole.

組電池１０の上面及び下面に配した固定部材１４は、組電池１０の長手方向に対して垂直方向に、５つ配されており電池列２０の位置ずれを防止している。固定部材１４は、スペーサー１８に設けた係止部１９により係止されるとともに、側板１１にリベット１５留めされている。   Five fixing members 14 arranged on the upper surface and the lower surface of the assembled battery 10 are arranged in a direction perpendicular to the longitudinal direction of the assembled battery 10 to prevent the battery row 20 from being displaced. The fixing member 14 is locked by a locking portion 19 provided on the spacer 18 and is fixed to the side plate 11 with a rivet 15.

組電池１０の上面に配されている固定部材１４のうち、ガス排出管３５の連結部３８の上に配されている固定部材１４は、ガス排出管３５の連結部３８と隣接する電池列２０のガス排出管３５の連結部３８とを連結してなる連結管（図示せず）の移動を抑制して、ガス排出管３５の位置ずれを防止する機能も有している。   Among the fixing members 14 arranged on the upper surface of the assembled battery 10, the fixing member 14 arranged on the connecting portion 38 of the gas exhaust pipe 35 is adjacent to the connecting portion 38 of the gas exhaust pipe 35. It also has a function of preventing displacement of the gas discharge pipe 35 by suppressing movement of a connection pipe (not shown) formed by connecting the connecting portion 38 of the gas discharge pipe 35.

組電池１０の側板１１の上端には、組電池１０の長手方向に対して平行に２つの溝１６，１６が設けられている。２つの溝１６，１６には、それぞれ、電池列２０を構成する単電池３０から排出されたガスを集めて車外に排出するためのガス収集管１７が収容されている。このガス収集管１７には、端部に位置するガス排出管３５の連結部３８が連結されており、ガス収集管１７の端部には図示しないガス排出ホースがさらに接続されて、単電池３０からガス排出管３５に排出されたガスを車外、又は、人の搭乗していない車内のスペースへ導くようになっている。   Two grooves 16, 16 are provided at the upper end of the side plate 11 of the assembled battery 10 in parallel with the longitudinal direction of the assembled battery 10. Each of the two grooves 16 and 16 accommodates a gas collection pipe 17 for collecting the gas discharged from the unit cells 30 constituting the battery array 20 and discharging it to the outside of the vehicle. A connecting portion 38 of a gas exhaust pipe 35 located at the end is connected to the gas collecting pipe 17, and a gas exhaust hose (not shown) is further connected to the end of the gas collecting pipe 17, so that the unit cell 30. The gas discharged from the gas discharge pipe 35 to the gas discharge pipe 35 is led to a space outside the vehicle or in a vehicle where no person is on board.

組電池１０を構成する電池列２０は、図３に示すように、角筒型の単電池３０を４つ接続して構成される。電池列２０は、単電池３０の負極端子３１と、当該単電池３０と隣接する単電池３０の正極端子３２とを接続することにより構成される。すなわち、単電池の正極端子３２および負極端子３１は隣接する単電池と電気的に接続可能な接続端子３１，３２に相当する。
隣接しあう２つの単電池３０，３０の間には、ガス排出管３５の接続部３７が配されている。 As shown in FIG. 3, the battery array 20 constituting the assembled battery 10 is configured by connecting four rectangular tube type single cells 30. The battery array 20 is configured by connecting a negative electrode terminal 31 of the unit cell 30 and a positive terminal 32 of the unit cell 30 adjacent to the unit cell 30. That is, the positive electrode terminal 32 and the negative electrode terminal 31 of the unit cell correspond to the connection terminals 31 and 32 that can be electrically connected to the adjacent unit cell.
A connecting portion 37 of a gas discharge pipe 35 is disposed between two adjacent unit cells 30 and 30.

電池列２０を構成する単電池３０（本発明の電池に相当）は、図４に示すように、角筒状をなす電池ケース３０Ａを備える。電池ケース３０Ａは、面積が最も大きい最大面３０Ｂと、最大面３０Ｂよりも面積が小さい面であるとともに、単電池３０内で発生したガスを排出する非復帰式のガス排出弁３３を設けたガス排出弁設置面３０Ｃ（図における上面）とを備える。
電池ケース３０Ａのガス排出弁設置面３０Ｃには、ガス排出弁３３以外に、当該ガス排出弁３３に接続される合成樹脂製のガス排出管３５と、注液口３４と、隣接する単電池３０と接続される負極端子３１（または正極端子３２）とを備える。本実施形態で設けた非復帰式のガス排出弁３３は、金属薄膜からなり、電池の内圧が上昇して金属箔膜が破れると、そこからガスが噴出して電池の内圧を低下させることができ好適である。
なお、図４および図５における上側面は、図１〜図３および図６の左側面に対応する。 As shown in FIG. 4, the unit cell 30 (corresponding to the battery of the present invention) constituting the battery array 20 includes a battery case 30 </ b> A having a rectangular tube shape. The battery case 30A is a gas having a maximum surface 30B having the largest area and a surface having a smaller area than the maximum surface 30B, and a non-returnable gas discharge valve 33 for discharging the gas generated in the unit cell 30. A discharge valve installation surface 30C (upper surface in the figure).
In addition to the gas discharge valve 33, the synthetic resin gas discharge pipe 35 connected to the gas discharge valve 33, the liquid injection port 34, and the adjacent unit cell 30 are provided on the gas discharge valve installation surface 30 </ b> C of the battery case 30 </ b> A. And a negative electrode terminal 31 (or a positive electrode terminal 32). The non-returnable gas discharge valve 33 provided in the present embodiment is made of a metal thin film. When the internal pressure of the battery rises and the metal foil film is broken, the gas is ejected therefrom to reduce the internal pressure of the battery. This is preferable.
4 and FIG. 5 corresponds to the left side of FIG. 1 to FIG. 3 and FIG.

ガス排出弁３３の上側（図４および図５における上側）には、口径と高さの異なる２つの円筒を同心円状に配した形状をなし、ガス排出管３５が接続される接続部材４１が設けられている。接続部材４１の外側の円筒部４１Ａには単電池３０のガス排出弁設置面３０Ｃに接合される半円状の接合部４１Ｃが設けられており、接続部材４１の内側の円筒部４１Ｂには切り欠け４１Ｅが設けられて、ガス排出弁３３から排出されたガスがガス排出管３５の連結部３８の方向に円滑に流れるようになっている。   On the upper side of the gas discharge valve 33 (upper side in FIGS. 4 and 5), there is provided a connecting member 41 to which two cylinders having different diameters and heights are concentrically arranged and to which the gas discharge pipe 35 is connected. It has been. The cylindrical portion 41A outside the connecting member 41 is provided with a semicircular joining portion 41C that is joined to the gas discharge valve installation surface 30C of the unit cell 30, and the cylindrical portion 41B inside the connecting member 41 is cut. The chip 41E is provided so that the gas discharged from the gas discharge valve 33 flows smoothly in the direction of the connecting portion 38 of the gas discharge pipe 35.

さて、ガス排出弁３３に接続されるガス排出管３５は、図４に示すように、ガス排出弁３３に接続される角筒状の接続部３７と、接続部３７から連設されて別のガス排出管３５と連結される円筒状の連結部３８とからなる。   As shown in FIG. 4, the gas discharge pipe 35 connected to the gas discharge valve 33 is connected to the rectangular tube-shaped connection portion 37 connected to the gas discharge valve 33 and another connection portion connected from the connection portion 37. It consists of a cylindrical connecting part 38 connected to the gas discharge pipe 35.

ガス排出管３５の接続部３７は、２つの単電池３０の外壁面に接するように配されている。詳しくはガス排出管３５の接続部３７は、当該ガス排出管３５を接続した単電池３０のガス排出弁設置面３０Ｃと、この単電池３０に接続される隣接する単電池３０の外壁面との間に接触するように配される。すなわち単電池３０とこの単電池３０に隣接する単電池３０とは、ガス排出管３５の接続部３７の厚さの分だけ離れている。   The connection part 37 of the gas exhaust pipe 35 is arranged so as to be in contact with the outer wall surfaces of the two unit cells 30. Specifically, the connection part 37 of the gas discharge pipe 35 is formed by connecting the gas discharge valve installation surface 30C of the unit cell 30 to which the gas discharge pipe 35 is connected and the outer wall surface of the adjacent unit cell 30 connected to the unit cell 30. Arranged to touch between. That is, the unit cell 30 and the unit cell 30 adjacent to the unit cell 30 are separated by the thickness of the connection portion 37 of the gas exhaust pipe 35.

ガス排出管３５の連結部３８は、隣接しあう２つの単電池の間の空間から突出して、他のガス排出管３５と連結される端部３９を電池列２０に対して垂直な方向（隣接する電池列２０または側板１１の方向）に向けて配されている。   The connecting portion 38 of the gas exhaust pipe 35 protrudes from the space between two adjacent unit cells, and the end 39 connected to the other gas exhaust pipe 35 is perpendicular to the battery row 20 (adjacent In the direction of the battery array 20 or the side plate 11 to be performed).

ガス排出管３５の接続部３７には、図５に示すように、ガス排出弁３３から排出されるガスが入る排気入口３６と、この排気入口３６から連結部３８の方向に連通する第１の排気通路３７Ａとが設けられている。ガス排出管３５の連結部３８には、接続部３７に設けた第１の排気通路３７Ａに連通して、この第１の排気通路３７Ａに対して交差する方向に第２の排気通路３８Ａが設けられている。なお、当該第２の排気通路３８Ａは、ガス排出管３５の連結部３８の一端部３９Ａから、他端部３９Ｂにかけて貫通している。   As shown in FIG. 5, the connection portion 37 of the gas discharge pipe 35 is connected to an exhaust inlet 36 into which the gas discharged from the gas discharge valve 33 enters, and a first communication communicating from the exhaust inlet 36 toward the connecting portion 38. An exhaust passage 37A is provided. The connecting portion 38 of the gas exhaust pipe 35 communicates with a first exhaust passage 37A provided in the connection portion 37, and a second exhaust passage 38A is provided in a direction intersecting the first exhaust passage 37A. It has been. The second exhaust passage 38A penetrates from one end 39A of the connecting portion 38 of the gas exhaust pipe 35 to the other end 39B.

接続部３７に設けた排気入口３６は、ガス排出弁３３の上に設けた接続部材４１を嵌め入れ可能な形状をなしている。具体的には接続部３７の排気入口３６は、図５における下側方向に突設された円筒状の接続突部３６Ａと、この接続突部３６Ａより口径を小さくすることにより形成した段差部３６Ｂとからなる。なお、接続突部３６Ａには、接続部材４１に設けた接合部４１Ｃに対応して、切欠部３６Ｃが設けられている。   The exhaust inlet 36 provided in the connection part 37 has a shape in which the connection member 41 provided on the gas discharge valve 33 can be fitted. Specifically, the exhaust inlet 36 of the connection portion 37 includes a cylindrical connection projection 36A projecting downward in FIG. 5 and a stepped portion 36B formed by reducing the diameter of the connection projection 36A. It consists of. The connection protrusion 36 </ b> A is provided with a notch 36 </ b> C corresponding to the joint 41 </ b> C provided on the connection member 41.

従って、ガス排出管３５をガス排出弁３３の上に設けた接続部材４１に嵌め込むと、排気入口３６の接続突部３６Ａは、接続部材４１の外側の円筒部４１Ａよりも外側に配され、排気入口３６の段差部３６Ｂに接続部材４１の外側の円筒部４１Ａの上端が当接し、接続突部３６Ａに設けた切欠部３６Ｃには、接続部材４１の接合部４１Ｃが配される。そして、ガス排出管３５の接続部３７の排気入口３６を備える面は単電池３０のガス排出弁設置面３０Ｃと面接触する。   Therefore, when the gas discharge pipe 35 is fitted into the connection member 41 provided on the gas discharge valve 33, the connection protrusion 36 </ b> A of the exhaust inlet 36 is arranged outside the cylindrical portion 41 </ b> A outside the connection member 41, The upper end of the cylindrical portion 41A outside the connection member 41 abuts on the stepped portion 36B of the exhaust inlet 36, and the joint portion 41C of the connection member 41 is disposed in the cutout portion 36C provided in the connection protrusion 36A. And the surface provided with the exhaust inlet 36 of the connection part 37 of the gas exhaust pipe 35 is in surface contact with the gas exhaust valve installation surface 30 </ b> C of the unit cell 30.

本実施形態では、ガス排出管３５の連結部３８は、隣接する電池列２０の単電池３０に設けたガス排出管３５の連結部３８にオーリング（図示せず）を介して連結され、端部に位置するガス排出管３５の連結部３８はオーリングを介してガス収集管１７に連結される（図１および図６を参照）。   In the present embodiment, the connecting portion 38 of the gas exhaust pipe 35 is connected to the connecting portion 38 of the gas exhaust pipe 35 provided in the unit cell 30 of the adjacent battery array 20 via an O-ring (not shown). The connecting part 38 of the gas exhaust pipe 35 located in the section is connected to the gas collecting pipe 17 through an O-ring (see FIGS. 1 and 6).

ガス排出管３５の連結部３８は、その端部３９がガス排出管３５の連結部３８またはガス収集管１７と連結可能な形状をなしている。具体的にはガス排出管３５の連結部３８の端部３９のうち、図５における手前側の一端部３９Ａは、手前側の直径を奥側の直径よりも小さくした段付き状に突出形成されており、奥側の他端部３９Ｂは扁平な形状をなしている。   The connecting portion 38 of the gas exhaust pipe 35 has a shape in which an end 39 can be connected to the connecting portion 38 of the gas exhaust pipe 35 or the gas collecting pipe 17. Specifically, among the end portions 39 of the connecting portion 38 of the gas exhaust pipe 35, one end portion 39A on the near side in FIG. 5 is formed to project in a stepped shape with the diameter on the near side smaller than the diameter on the far side. The other end 39B on the back side has a flat shape.

段付き状に形成された一端部３９Ａは、絶縁フィルム１３の挿通孔、スペーサー１８の挿通孔が挿通されるとともに、オーリングを挟んで、別のガス排出管３５の連結部３８またはガス収集管１７にはめ込まれるようになっている。一方、扁平な形状をなす他端部３９Ｂは、隣接する電池列２０のガス排出管３５の連結部３８の段付き状に形成された一端部３９Ａが嵌め入れられるようになっている。   The one end portion 39A formed in a stepped shape is inserted with the insertion hole of the insulating film 13 and the insertion hole of the spacer 18, and the connecting portion 38 of another gas exhaust pipe 35 or the gas collection pipe with the O-ring interposed therebetween. 17 is to be fitted. On the other hand, the other end portion 39B having a flat shape is fitted with one end portion 39A formed in a stepped shape of the connecting portion 38 of the gas discharge pipe 35 of the adjacent battery array 20.

次に、本実施形態の組電池１０の作用について説明する。
本実施形態の組電池１０において、組電池１０を構成する単電池３０が異常発熱した場合、単電池３０の内部ではガスが発生して、当該単電池３０は膨らむ。膨らんだ単電池３０に配されているガス排出管３５の接続部３７は、当該単電池３０に圧迫されて、隣接する単電池３０の外壁面に押し付けられて強固に固定される。そして単電池３０の内部の圧力を下げるために、単電池３０のガス排出弁３３から電池内で発生したガスが排出される。 Next, the effect | action of the assembled battery 10 of this embodiment is demonstrated.
In the assembled battery 10 of the present embodiment, when the unit cell 30 constituting the assembled battery 10 abnormally generates heat, gas is generated inside the unit cell 30 and the unit cell 30 expands. The connecting portion 37 of the gas discharge pipe 35 disposed on the expanded unit cell 30 is pressed against the unit cell 30 and pressed against the outer wall surface of the adjacent unit cell 30 to be firmly fixed. In order to reduce the pressure inside the unit cell 30, the gas generated in the cell is discharged from the gas discharge valve 33 of the unit cell 30.

当該ガス排出弁３３から排出されたガスは、ガス排出管３５の接続部３７に設けた排気入口３６から第１の排気通路３７Ａを通ってガス連結部３８に設けた第２の排気通路３８Ａの方向へ移動する。
第２の排気通路３８Ａに移動したガスは、２以上のガス排出管３５の連結部３８を連結してなる連結管を通ってガス収集管１７に移動するか、あるいは、直接ガス収集管１７に移動し、ガス収集管１７からガス排出ホースを通って車外、または、人の搭乗しているスペース以外の車内のスペースに移動する。 The gas discharged from the gas discharge valve 33 passes through the first exhaust passage 37A from the exhaust inlet 36 provided in the connection portion 37 of the gas discharge pipe 35, and passes through the second exhaust passage 38A provided in the gas connection portion 38. Move in the direction.
The gas moved to the second exhaust passage 38A moves to the gas collecting pipe 17 through a connecting pipe formed by connecting the connecting portions 38 of two or more gas exhaust pipes 35 or directly to the gas collecting pipe 17. It moves from the gas collection pipe 17 through the gas discharge hose to a space outside the vehicle or a space inside the vehicle other than the space where people are boarding.

次に、本実施形態の効果について説明する。
本実施形態においては、単電池３０の内圧が上昇したときのみ、ガス排出管３５の接続部３７は、単電池３０の外壁面（ガス排出弁設置面３０Ｃ）と当該単電池３０に隣接する単電池３０の外壁面とから強く圧迫される。したがって、本実施形態によれば、電池内圧が正常な状態においては、２つの単電池３０の外壁面から強い圧迫力を受けずにガス排出管３５を配することが可能となるので、クリープ現象の問題を抑制することができる。 Next, the effect of this embodiment will be described.
In the present embodiment, only when the internal pressure of the unit cell 30 increases, the connection part 37 of the gas exhaust pipe 35 is connected to the outer wall surface (gas exhaust valve installation surface 30C) of the unit cell 30 and the unit cell 30 adjacent to the unit cell 30. It is strongly pressed from the outer wall surface of the battery 30. Therefore, according to the present embodiment, in a state where the battery internal pressure is normal, the gas discharge pipe 35 can be arranged without receiving a strong compressive force from the outer wall surfaces of the two unit cells 30. Therefore, the creep phenomenon The problem can be suppressed.

そして、本実施形態においては、単電池３０が異常発熱して膨らんだ場合に、ガス排出管３５の接続部３７は、膨らんだ単電池３０から強く圧迫されて強固に固定されるので、位置ずれが起こり難い。その結果、本実施形態によれば、電池３０から外れにくいガス排出管３５を備えた組電池１０を提供することができる。   In the present embodiment, when the unit cell 30 swells due to abnormal heat generation, the connecting portion 37 of the gas discharge pipe 35 is strongly pressed and firmly fixed from the swelled unit cell 30, so that the positional deviation occurs. Is unlikely to occur. As a result, according to the present embodiment, it is possible to provide the assembled battery 10 including the gas discharge pipe 35 that is difficult to be detached from the battery 30.

また、本実施形態においては、２枚の側板１１の間に、５列の電池列が並列して配されるとともに、隣接しあう電池列２０の間には絶縁フィルム１３と、スペーサー１８とが配されている。従って、本実施形態によれば、２枚の側板１１と絶縁フィルム１３とスペーサーとが、電池ケース３０Ａの最大面３０Ｂにおける膨れを抑制する抑制部材として機能し、電池ケース３０Ａの面積の小さい面（ガス排出弁設置面３０Ｃ）が膨れ易くなるので、電池３０とガス排出管３５とが押し合う力を充分に増加させることができる。   Further, in the present embodiment, five battery rows are arranged in parallel between the two side plates 11, and an insulating film 13 and a spacer 18 are provided between the adjacent battery rows 20. It is arranged. Therefore, according to the present embodiment, the two side plates 11, the insulating film 13, and the spacer function as a suppressing member that suppresses swelling on the maximum surface 30B of the battery case 30A, and the surface of the battery case 30A with a small area ( Since the gas discharge valve installation surface 30C) is likely to swell, the force with which the battery 30 and the gas discharge pipe 35 are pressed can be sufficiently increased.

また本実施形態によれば、ガス排出管３５の連結部３８は円筒状をなし、オーリングを介して別のガス排出管３５の連結部３８と連結されるので、連結部３８の気密性を向上させることができる。   In addition, according to the present embodiment, the connecting portion 38 of the gas exhaust pipe 35 has a cylindrical shape and is connected to the connecting portion 38 of another gas exhaust pipe 35 via the O-ring. Can be improved.

さらに、本実施形態によれば、ガス排出管３５の連結部３８の上に配されて、ガス排出管３５の連結部３８と別のガス排出管３５の連結部３８とを連結した部分を固定する固定部材１４を備えるから、ガス排出管３５の連結部３８の移動を抑制するとともに、連結部３８の位置ずれを有効に防止することができる。   Furthermore, according to the present embodiment, the portion that is disposed on the connecting portion 38 of the gas exhaust pipe 35 and connects the connecting portion 38 of the gas exhaust pipe 35 and the connecting portion 38 of another gas exhaust pipe 35 is fixed. Since the fixing member 14 is provided, the movement of the connecting portion 38 of the gas discharge pipe 35 can be suppressed, and the displacement of the connecting portion 38 can be effectively prevented.

ところで、上記特許文献１に記載の電池のように、単電池を複数接続してなる電池列の外側方向へ、隣接する単電池と電気的に接続するための接続端子が突出形成された構成のものでは、電池列の外側方向に接続端子のためのスペースが必要となるため、電池の容積の増大が懸念される。   By the way, like the battery of the said patent document 1, the connection terminal for electrically connecting with an adjacent unit cell protruded in the outer direction of the battery row | line | column formed by connecting a plurality of unit cells. However, since a space for the connection terminal is required in the outer direction of the battery array, there is a concern about an increase in the volume of the battery.

本実施形態によれば、隣接する単電池３０と電気的に接続するための接続端子３１，３２はガス排出管設置面に設けられている。このガス排出管設置面は、少なくとも、ガス排出管の接続部の厚さだけ隣の電池と離れており、本実施形態では、この電池間のスペースに接続端子３１，３２を設けたから、接続端子３１，３２のためのスペースを別途設ける必要はない。また、電池列２０の側面においても、接続端子３１，３２のためのスペースを別途設ける必要はない。
その結果、本実施形態によれば、省スペースとすることが可能である。 According to the present embodiment, the connection terminals 31 and 32 for electrical connection with the adjacent unit cells 30 are provided on the gas discharge pipe installation surface. This gas discharge pipe installation surface is separated from the adjacent battery by at least the thickness of the connection part of the gas discharge pipe. In this embodiment, the connection terminals 31 and 32 are provided in the space between the batteries. It is not necessary to provide a separate space for 31 and 32. Further, it is not necessary to provide a space for the connection terminals 31 and 32 on the side surface of the battery array 20.
As a result, according to the present embodiment, space can be saved.

＜他の実施形態＞
本発明は上記記述及び図面によって説明した実施形態に限定されるものではなく、例えば次のような実施形態も本発明の技術的範囲に含まれる。
（１）上記実施形態では本発明をリチウムイオン電池に適用した例を示したが、本発明はニッケル水素電池などの他の電池に適用してもよい。
（２）上記実施形態では本発明を組電池に適用した例を示したが、単電池であってもよい。
（３）上記実施形態では、ガス排出管が電池と電池との間に挟まれている構成のものを示したが、ガス排出管は電池と電池以外の別の部材（圧迫部材など）との間に挟まれていてもよいし、ガス排出管と、電池または別の部材との間に、フィルム状または板状の部材を挟んだものであってもよい。 <Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) In the above embodiment, an example in which the present invention is applied to a lithium ion battery has been described. However, the present invention may be applied to another battery such as a nickel metal hydride battery.
(2) In the above embodiment, an example in which the present invention is applied to an assembled battery is shown, but a single battery may be used.
(3) In the above embodiment, the gas exhaust pipe is sandwiched between the batteries, but the gas exhaust pipe is connected to the battery and another member (such as a compression member) other than the battery. It may be sandwiched between them, or a film-like or plate-like member may be sandwiched between the gas exhaust pipe and the battery or another member.

（４）上記実施形態では、第１の排気通路と第２の排気通路を有し、連結部を介して連結するガス排出管を示したが、たとえば、１本の直線状のガス排出管の１側面に複数の電池と接続されるための複数の穴が等間隔で設けられており、その両側に電池列が配置される構造のものであってもよい。
（５）上記実施形態では、ガス排出弁と、接続端子とを同じ面に設けたものを示したが、接続端子はガス排出弁設置面とは別の面に設けたものであってもよい。
（６）上記実施形態では角筒状の電池ケースを備える電池を示したが電池ケースは円筒状などであってもよい。
（７）上記実施形態では、非復帰式のガス排出弁を備えるものを示したが、復帰式のガス排出弁を備えるものであってもよい。 (4) In the above embodiment, the gas exhaust pipe having the first exhaust passage and the second exhaust passage and connected via the connecting portion is shown. For example, a single straight gas exhaust pipe It may have a structure in which a plurality of holes for connecting to a plurality of batteries are provided on one side surface at equal intervals, and battery rows are arranged on both sides thereof.
(5) In the above embodiment, the gas discharge valve and the connection terminal are provided on the same surface, but the connection terminal may be provided on a different surface from the gas discharge valve installation surface. .
(6) In the above-described embodiment, the battery including the rectangular battery case is shown, but the battery case may be cylindrical.
(7) In the above embodiment, the non-returnable gas discharge valve is shown. However, the non-returnable gas discharge valve may be provided.

（８）上記実施形態では、ガス排出管の接続部が角筒状をなすものを示したが、ガス排出管の接続部は、円筒状などであってもよい。
（９）上記実施形態では、ガス排出管の連結部が円筒状をなしてオーリングを介して他のガス排出管に連結されるものを示したが、連結部は円筒状でなくてもよいし、オーリングを備えないものであってもよい。
（１０）上記実施形態では、ガス排出管の連結部を他のガス排出管の連結部と連結した部分を固定する固定部材を備えるものを示したが、固定部材を備えないものであってもよい。 (8) In the above embodiment, the connection part of the gas discharge pipe has a rectangular tube shape, but the connection part of the gas discharge pipe may be cylindrical.
(9) In the above embodiment, the connection part of the gas discharge pipe has a cylindrical shape and is connected to another gas discharge pipe via the O-ring. However, the connection part may not be cylindrical. However, it may not have an O-ring.
(10) In the above-described embodiment, the one including the fixing member that fixes the portion where the connecting portion of the gas exhaust pipe is connected to the connecting portion of the other gas exhaust pipe is shown, but the fixing member may not be provided. Good.

実施形態１の組電池を示す斜視図The perspective view which shows the assembled battery of Embodiment 1. FIG. 図１に示した組電池の側面概略図Schematic side view of the battery pack shown in FIG. 組電池を構成する電池列を示す斜視図The perspective view which shows the battery row | line which comprises an assembled battery 電池列の一部を示す斜視図であって、上下に接続端子が配されるように描いた図The perspective view which shows a part of battery row | line | column, Comprising: A figure drawn so that a connection terminal may be arranged up and down 図４の一部を拡大して示した斜視図The perspective view which expanded and showed a part of FIG. ガス排出管の連結方向を示す斜視図The perspective view which shows the connection direction of a gas exhaust pipe

符号の説明Explanation of symbols

１０…組電池（電池システム）
３０…単電池（電池）
３１…負極端子（接続端子）
３２…正極端子（接続端子）
３３…ガス排出弁
３５…ガス排出管 10 ... Battery (battery system)
30 ... Single cell (battery)
31 ... Negative terminal (connection terminal)
32 ... Positive terminal (connection terminal)
33 ... Gas exhaust valve 35 ... Gas exhaust pipe

Claims (4)

ガス排出弁を設けた電池と、前記電池の内圧が上昇したときに前記ガス排出弁から排出されるガスを排出するガス排出管とを備え、前記電池の内圧の上昇により当該電池が膨れることで前記電池と前記ガス排出管との押し合う力が増加する電池システムであって、
前記ガス排出管を、前記電池の内圧が上昇したときに前記ガス排出管と押し合う電池と、この電池及び前記ガス排出管以外の別の部材との間に配するとともに、当該電池と当該別の部材の間においては当該電池にのみ接続し、
前記電池の内圧が上昇したときに、前記ガス排出管が、前記電池と前記別の部材とから押されるようにしたことを特徴とする電池システム。 A battery having a gas discharge valve, and a gas discharge pipe for discharging the gas discharged from the gas discharge valve when the internal pressure of the battery rises, the increase in the internal pressure of the battery that the battery swells A battery system in which a pressing force between the battery and the gas discharge pipe increases ,
The gas exhaust pipe is disposed between a battery that presses against the gas exhaust pipe when the internal pressure of the battery increases, and another member other than the battery and the gas exhaust pipe. Connect only to the battery between the members of
The battery system, wherein when the internal pressure of the battery rises, the gas discharge pipe is pushed from the battery and the another member . 前記電池は電池ケースを備え、
前記電池ケースは面積が最も大きい最大面と、前記最大面よりも面積が小さい面であるとともに前記ガス排出弁を設けたガス排出弁設置面とを備え、
前記電池の内圧が上昇したときの前記最大面における膨れを抑制する抑制部材を、前記電池ケースの周囲に設け、かつ、
前記電池の内圧が上昇したときに、前記電池ケースの前記ガス排出弁設置面と前記ガス排出管との押し合う力が増加することを特徴とする請求項１に記載の電池システム。 The battery includes a battery case,
The battery case includes a maximum surface having the largest area, and a gas discharge valve installation surface provided with the gas discharge valve as well as a surface having a smaller area than the maximum surface,
A suppression member that suppresses swelling at the maximum surface when the internal pressure of the battery is increased is provided around the battery case, and
2. The battery system according to claim 1 , wherein when the internal pressure of the battery rises, a pressing force between the gas discharge valve installation surface of the battery case and the gas discharge pipe increases . ガス排出弁を設けた電池と、前記電池の内圧が上昇したときに前記ガス排出弁から排出されるガスを排出するガス排出管とを備え、前記電池の内圧の上昇により当該電池が膨れることで前記電池と前記ガス排出管との押し合う力が増加する電池システムであって、A battery provided with a gas discharge valve; and a gas discharge pipe for discharging gas discharged from the gas discharge valve when the internal pressure of the battery increases, and the battery expands due to an increase in the internal pressure of the battery. A battery system in which a pressing force between the battery and the gas discharge pipe increases,
前記電池は電池ケースを備え、  The battery includes a battery case,
前記電池ケースは面積が最も大きい最大面と、前記最大面よりも面積が小さい面であるとともに前記ガス排出弁を設けたガス排出弁設置面とを備え、  The battery case includes a maximum surface having the largest area, and a gas discharge valve installation surface provided with the gas discharge valve as well as a surface having a smaller area than the maximum surface,
前記電池の内圧が上昇したときの前記最大面における膨れを抑制する抑制部材を、前記電池ケースの周囲に設け、かつ、  A suppression member that suppresses swelling at the maximum surface when the internal pressure of the battery is increased is provided around the battery case, and
前記電池の内圧が上昇したときに、前記電池ケースの前記ガス排出弁設置面と前記ガス排出管との押し合う力が増加し、  When the internal pressure of the battery rises, the pressing force between the gas discharge valve installation surface of the battery case and the gas discharge pipe increases,
前記電池は、前記電池ケースの前記ガス排出弁設置面と、当該ガス排出弁設置面に対向する外側面とに、別の電池と電気的に接続可能な接続端子を備え、  The battery includes a connection terminal electrically connectable to another battery on the gas discharge valve installation surface of the battery case and an outer surface facing the gas discharge valve installation surface,
前記ガス排出管は、前記ガス排出弁に接続されるとともに、その内部に前記ガス排出弁からのガスが通る第１の排気通路を有する接続部と、  The gas discharge pipe is connected to the gas discharge valve and has a first exhaust passage through which gas from the gas discharge valve passes,
前記接続部から連設されて、その内部に前記第１の排気通路と交差する方向に連通する第２の排気通路を有するとともに、別の電池のガス排出管と連結される連結部とからなり、  It has a second exhaust passage which is provided continuously from the connection portion and communicates in the direction intersecting with the first exhaust passage, and is connected to a gas discharge pipe of another battery. ,
前記電池を複数個、前記接続端子を介して接続することにより、前記ガス排出管の接続部を、前記電池ケースの前記ガス排出弁設置面と、隣接する電池の前記電池ケースの外側面との間に配したことを特徴とする電池システム。  By connecting a plurality of the batteries via the connection terminals, the connection part of the gas discharge pipe is connected to the gas discharge valve installation surface of the battery case and the outer surface of the battery case of the adjacent battery. A battery system characterized by being placed in between. 前記ガス排出管を、前記電池の内圧が上昇したときに前記ガス排出管と押し合う電池と、この電池及び前記ガス排出管以外の別の部材との間に配して、前記電池の内圧が上昇したときに、前記ガス排出管が、前記電池と前記別の部材とから押されるようにしたことを特徴とする請求項３に記載の電池システム。The gas discharge pipe is arranged between a battery that presses against the gas discharge pipe when the internal pressure of the battery rises, and another member other than the battery and the gas discharge pipe, so that the internal pressure of the battery is 4. The battery system according to claim 3, wherein the gas discharge pipe is pushed from the battery and the another member when the gas rises.
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