JP2009301888A - Pressure regulating device of battery - Google Patents

Pressure regulating device of battery Download PDF

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JP2009301888A
JP2009301888A JP2008155480A JP2008155480A JP2009301888A JP 2009301888 A JP2009301888 A JP 2009301888A JP 2008155480 A JP2008155480 A JP 2008155480A JP 2008155480 A JP2008155480 A JP 2008155480A JP 2009301888 A JP2009301888 A JP 2009301888A
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pressure
battery
introduction passage
battery cell
relief valve
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Kazuya Nishimura
和也 西村
Kazuo Tsutsumi
香津雄 堤
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Kawasaki Heavy Industries 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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Abstract

<P>PROBLEM TO BE SOLVED: To provide a pressure regulating device of a battery, which prevents the corrosion of a pressure sensor for inner pressure detection of a cell of the battery. <P>SOLUTION: The pressure adjusting device A of the battery includes a pressure sensor 21 detecting the internal pressure of a cell C of the battery; a pressure introduction passage 11 communicating the cell C of the battery with the pressure sensor 21; and a mist separator 29 installed in the pressure introduction passage 11 and capturing the electrolyte of the cell C of the battery. A housing chamber 23 forming a passage expansion part is formed in the pressure introduction passage 11, and the mist separator 29 is housed in the housing chamber 23. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、電車のような車両に搭載される充放電可能な二次電池、詳しくはこのような電池の圧力調整装置に関する。   The present invention relates to a chargeable / dischargeable secondary battery mounted on a vehicle such as a train, and more particularly to a pressure adjusting device for such a battery.

近年、環境への配慮から自動車や電車などの車両に、充放電可能な二次電池を搭載したものが開発されている。この二次電池としては、密閉式電池であるニッケル水素電池やリチウムイオン電池が多く使われている。このような電池では、充電時に電池セルの内部圧力（内圧）が上昇するので、これを圧力センサで検出したり（特許文献１）、発生したガスを強制的に外部に排出することで（特許文献２）電池セルを保護している。
特開平９−１２０８４５号 特開２００７−２６５６５８号 In recent years, in consideration of the environment, a vehicle such as an automobile or a train equipped with a rechargeable secondary battery has been developed. As the secondary battery, a nickel-metal hydride battery or a lithium ion battery, which is a sealed battery, is often used. In such a battery, since the internal pressure (internal pressure) of the battery cell increases during charging, this can be detected by a pressure sensor (Patent Document 1) or by forcibly discharging the generated gas to the outside (patent) Reference 2) The battery cell is protected.
JP-A-9-120845 JP 2007-265658 A

ところが、通常の運用では問題ないが、万一、過充電などにより急激に電池内圧が上昇した際には、電池セルの内圧上昇に伴い発生するガスに、電解液の一部が気化して、その成分が混在する。電解液はＫＯＨ、ＮａＯＨ、ＬｉＯＨというようなアルカリ性物質からなるアルカリ系水溶液であるから、圧力センサによる電池セルの内圧の検出時、圧力センサはこのような電解液の蒸気に曝されるので、長期間の使用により、腐食される可能性がある。また、ガスを外部に排出して電池内部の圧力を低下させようとすると、排出されるガスには、気化した電解液だけでなく一部液状のままの電解液も含まれている。ガス中の電解液は前述したようにアルカリ性物質なので、環境への配慮から、この電解液をそのまま廃棄するのは好ましくない。さらに、人体に触れると炎症を起こすおそれがある。   However, there is no problem in normal operation, but in the unlikely event that the battery internal pressure suddenly rises due to overcharge, etc., a part of the electrolyte vaporizes in the gas generated with the internal pressure increase of the battery cell, The ingredients are mixed. Since the electrolytic solution is an alkaline aqueous solution made of an alkaline substance such as KOH, NaOH, LiOH, the pressure sensor is exposed to the vapor of the electrolytic solution when the internal pressure of the battery cell is detected by the pressure sensor. Corrosion may occur due to the use of period. Further, when the gas is discharged to reduce the pressure inside the battery, the discharged gas includes not only the vaporized electrolyte but also a partially liquid electrolyte. Since the electrolyte in the gas is an alkaline substance as described above, it is not preferable to discard the electrolyte as it is because of environmental considerations. In addition, touching the human body may cause irritation.

本発明の第１の目的は、電池セルの内圧検出用の圧力センサの腐食を防止することにある。本発明の第２の目的は、電池セルからガス-.0とともに排出される電解液を迅速かつ安価に、さらには安全に中和処理することにある。   A first object of the present invention is to prevent corrosion of a pressure sensor for detecting the internal pressure of a battery cell. The second object of the present invention is to neutralize the electrolyte discharged from the battery cell together with the gas -.0 quickly, inexpensively, and safely.

前記第１の目的を達成するために、本発明に係る電池の圧力調整装置は電池セルの内部圧力を検出する圧力センサと、前記電池セルを圧力センサ内に連通する圧力導入通路と、前記圧力導入通路に設けられて前記電池セルの電解液を捕獲するミストセパレータとを備えている。   In order to achieve the first object, a battery pressure adjusting device according to the present invention includes a pressure sensor that detects an internal pressure of a battery cell, a pressure introduction passage that communicates the battery cell with the pressure sensor, and the pressure. And a mist separator that is provided in the introduction passage and captures the electrolytic solution of the battery cell.

この構成によれば、電池セルの内部圧力を圧力センサで検出する際、電池セルから高い圧力で電解液を含むガス（以下「流出物」という）が圧力導入通路に流入しても、流出物に含まれる電解液は、ミストセパレータで捕獲され、圧力センサに達しない。これにより、電解液による圧力センサの腐食が防止される。   According to this configuration, when the internal pressure of the battery cell is detected by the pressure sensor, even if a gas containing electrolyte (hereinafter referred to as “outflow”) flows into the pressure introduction passage at a high pressure from the battery cell, The electrolyte contained in is not captured by the mist separator and reaches the pressure sensor. Thereby, corrosion of the pressure sensor due to the electrolytic solution is prevented.

本発明において、好ましくは、前記圧力導入通路に、通路拡張部を形成する収納室が設けられ、この収納室に前記ミストセパレータが収納されている。これにより、電池セルからの前記流出物は、通路面積の大きい収納室内に流入することで流速が低下するので、ミストセパレータにより効率的に捕獲される。また、通路拡張部である収納室により、ミストセパレータを収納するための大きな収納スペースを確保することができる。   In the present invention, it is preferable that a storage chamber for forming a passage expansion portion is provided in the pressure introduction passage, and the mist separator is stored in the storage chamber. Accordingly, the effluent from the battery cell is efficiently captured by the mist separator because the flow velocity is reduced by flowing into the storage chamber having a large passage area. In addition, a large storage space for storing the mist separator can be secured by the storage chamber that is the passage expansion portion.

本発明において、好ましくは、前記収納室を有する緩衝器と前記圧力センサとが前記圧力導入通路の一部を形成する中空ねじ体により連結され、前記緩衝器に、前記電池セルの内部に連通した前記圧力導入通路が接続されている。   In the present invention, preferably, the shock absorber having the storage chamber and the pressure sensor are connected by a hollow screw body forming a part of the pressure introduction passage, and communicated with the shock absorber to the inside of the battery cell. The pressure introduction passage is connected.

この構成によれば、中空ねじ体を備えた既存の圧力センサを使用し、これを緩衝器にねじ込むことで、圧力センサと緩衝器とを容易に連結することができる。   According to this configuration, the pressure sensor and the shock absorber can be easily connected by using an existing pressure sensor having a hollow screw body and screwing it into the shock absorber.

前記第２の目的を達成するために、本発明において、さらに、前記圧力導入通路内の圧力が所定値に達したときに開弁して減圧するリリーフ弁と、前記リリーフ弁の開弁により排出された電解液を捕集する捕集容器とを備え、前記捕集容器内に前記電解液を中和させる中和剤が装填されているのが好ましい。このように構成することで、捕集容器内に電解液を捕集すると同時に捕集された電解液が中和されるので、捕集した電解液を別の処理装置に移し変える面倒な処理が必要なく、迅速かつ安価に中和処理ができる。また、電解液が人体に触れて炎症を起こすおそれがなくなり、安全性が向上する。   In order to achieve the second object, in the present invention, a relief valve that opens and depressurizes when the pressure in the pressure introduction passage reaches a predetermined value, and discharges by opening the relief valve. It is preferable that a neutralization agent for neutralizing the electrolytic solution is loaded in the collection container. By configuring in this way, the collected electrolyte solution is neutralized at the same time as collecting the electrolyte solution in the collection container, so that the troublesome processing of transferring the collected electrolyte solution to another processing apparatus is eliminated. There is no need for neutralization treatment quickly and inexpensively. In addition, there is no risk that the electrolyte solution touches the human body to cause inflammation, and safety is improved.

本発明において、前記リリーフ弁と前記緩衝器とが、前記圧力導入通路の一部を形成する中空ねじ体により連結されていてもよい。この場合も前記緩衝器と圧力センサとの連結と同様、リリーフ弁と緩衝器とを連結するねじ体が、両者を連通させる圧力導入通路の一部を形成しているので、両者を連通させる通路部材を別途設ける必要がなくなり、部品点数の削減と構造の簡略化が図れる。   In this invention, the said relief valve and the said buffer may be connected with the hollow screw body which forms a part of said pressure introduction channel | path. Also in this case, since the screw body that connects the relief valve and the shock absorber forms part of the pressure introduction passage that communicates both, similarly to the connection between the shock absorber and the pressure sensor, the passage that communicates the two. There is no need to provide a separate member, and the number of parts can be reduced and the structure can be simplified.

本発明において、好ましくは、前記リリーフ弁の排出口を形成する排出部が前記容器の導入口に挿入され、前記排出部と導入口との間に気体のみを通すフィルタが介装されている。このように構成することで、捕集容器内への電解液の捕集と同時に流入して捕集容器内に充満したガスを、フィルタを通して容器外にスムースに排出することができる。これにより、捕集容器内は捕集容器外と同様、大気圧となり、次の捕集に備えることができる。捕集容器内を常に大気圧にできることで、容器内に多量の電解液を捕集できるから、小形の捕集容器で足り、コンパクト化が図れる。   In this invention, Preferably, the discharge part which forms the discharge port of the said relief valve is inserted in the inlet of the said container, and the filter which lets only gas pass between the said outlet and the inlet is interposed. By comprising in this way, the gas which flowed simultaneously with the collection of the electrolyte solution in the collection container and filled the collection container can be smoothly discharged out of the container through the filter. As a result, the inside of the collection container becomes the atmospheric pressure like the outside of the collection container, and can be prepared for the next collection. Since the inside of the collection container can always be at atmospheric pressure, a large amount of electrolyte can be collected in the container, so a small collection container is sufficient, and a compact design can be achieved.

本発明によれば、電池セルの内部圧力を圧力センサで検出する際、電池セルから高い圧力で流出物が圧力導入通路に流入しても、この流出物に含まれる電解液は、ミストセパレータで捕獲される。これにより、圧力センサが電解液に曝されて起きる腐食が防止される。   According to the present invention, when the internal pressure of the battery cell is detected by the pressure sensor, even if the effluent flows into the pressure introduction passage at a high pressure from the battery cell, the electrolyte contained in the effluent is separated by the mist separator. Be captured. Thereby, the corrosion which arises when a pressure sensor is exposed to electrolyte solution is prevented.

以下、本発明の好ましい実施形態について図面を参照しながら詳述する。図１は本発明の電池の圧力調整装置を示す。   Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a pressure adjusting device for a battery according to the present invention.

同図において、圧力調整装置Ａと電池セルＣとが、圧力導入通路１１の一部を形成する第１および第２のチューブ１２，１３により接続されて、電池セルＣの内部圧力が圧力調整装置Ａに導入されている。チューブ１２，１３はコネクタ１４により着脱可能に連結されている。圧力調整装置Ａは、圧力センサ２１と、収納室２３を有する緩衝器２２と、リリーフ弁２４とを有し、圧力センサ２１と緩衝器２２とを、圧力導入通路１１の他の一部を形成する第１の中空ねじ体２７により連結し、緩衝器２２とリリーフ弁２４とを圧力導入通路１１のさらに他の一部を形成する第２の中空ねじ体２８により連結している。前記圧力センサ２１は、ケース２１ａにセンサ素子２１ｂを収納したものであり、センサ素子２１ｂとして、ステンレス薄板の裏面に歪みゲージが貼着された構造のものが使用されているが、その他のセンサ素子であっても差し支えない。第1の中空ねじ体２７は、ケース２１ａに一体形成されているが、別体としてケース２１ａにねじ込む構造でもよい。   In the figure, a pressure adjusting device A and a battery cell C are connected by first and second tubes 12 and 13 that form a part of a pressure introducing passage 11, and the internal pressure of the battery cell C is changed to a pressure adjusting device. A is introduced. The tubes 12 and 13 are detachably connected by a connector 14. The pressure adjusting device A includes a pressure sensor 21, a shock absorber 22 having a storage chamber 23, and a relief valve 24. The pressure sensor 21 and the shock absorber 22 form another part of the pressure introduction passage 11. The shock absorber 22 and the relief valve 24 are connected by a second hollow screw body 28 that forms still another part of the pressure introducing passage 11. The pressure sensor 21 is a case in which a sensor element 21b is housed in a case 21a. The sensor element 21b has a structure in which a strain gauge is attached to the back surface of a thin stainless steel plate. It doesn't matter. The first hollow screw body 27 is integrally formed with the case 21a, but may be structured to be screwed into the case 21a as a separate body.

リリーフ弁２４はボールからなる弁体２４ａを有し、この弁体２４ａと受けリング２４ｂとの間に介装したばね２４ｃにより、弁体２４ａに閉弁方向へのばね力を付加している。ミストセパレータ２９は、圧力導入通路１１の導入圧力が一定値に上昇したときに、ばね２４ｃのばね力に抗して弁体２４ａが弁口２４ｄを開放することで開弁し、一定値未満のときに前記ばね力によって閉弁するものであり、同様の働きを有するものであれば、そのタイプを問わない。   The relief valve 24 has a valve body 24a made of a ball, and a spring force in the valve closing direction is applied to the valve body 24a by a spring 24c interposed between the valve body 24a and the receiving ring 24b. The mist separator 29 opens when the valve body 24a opens the valve port 24d against the spring force of the spring 24c when the introduction pressure of the pressure introduction passage 11 rises to a certain value, and the mist separator 29 is less than the certain value. The type is not limited as long as the valve is sometimes closed by the spring force and has the same function.

前記緩衝器２２は例えば六角柱状であり、内部に、電池セルＣからの流出物Ｂの流速を低下させる大きな容積をもつ収納室２３を有し、この収納室２３の上部が第１の中空ねじ体２７を介して圧力センサ２１に連通し、収納室２３における圧力センサ２１寄りにはミストセパレータ２９が収納されている。収納室２３は、圧力導入通路１１における第１および第２のチューブ１２，１３により形成される部分よりも通路面積が大きい拡張通路部を形成している。ミストセパレータ２９はポリエチレン製の不織布のような、ミストの吸着性および気体の通気性に優れたものであれば、材質は特に問わない。前記緩衝器２２の側壁には、収納室２３の内部に連通する導入ニップル１６が装着されており、この導入ニップル１６にチューブ１２の一端部が接続されている。   The shock absorber 22 has, for example, a hexagonal column shape, and has a storage chamber 23 having a large volume for reducing the flow rate of the effluent B from the battery cell C. The upper portion of the storage chamber 23 is a first hollow screw. A mist separator 29 is accommodated near the pressure sensor 21 in the storage chamber 23 in communication with the pressure sensor 21 via the body 27. The storage chamber 23 forms an extended passage portion having a passage area larger than the portion formed by the first and second tubes 12 and 13 in the pressure introduction passage 11. The material of the mist separator 29 is not particularly limited as long as it is excellent in mist adsorption and gas permeability, such as a polyethylene nonwoven fabric. An introduction nipple 16 communicating with the inside of the storage chamber 23 is attached to the side wall of the shock absorber 22, and one end of the tube 12 is connected to the introduction nipple 16.

前記リリーフ弁２４の下部には排出口２４ｅを有する排出ニップルからなる排出部２４ｆが形成され、この排出部２４ｆの先端が、電解液を中和する所定量の中和剤３５が充填された捕集容器３７の導入口３７ａに挿入され、この導入口３７ａと前記排出部２４ｆの外周面との間に、気体のみを通過させるフィルタ３９が介装されている。リリーフ弁２４としては、排出口２４ｅに接続した排出用チューブを使用することもでき、その場合には排出用チューブの先端部である排出部を捕集容器３７の導入口３７ａに挿入する。   A discharge part 24f comprising a discharge nipple having a discharge port 24e is formed at the lower part of the relief valve 24, and the tip of the discharge part 24f is filled with a predetermined amount of neutralizing agent 35 for neutralizing the electrolyte. A filter 39 that is inserted into the inlet 37a of the collection container 37 and allows only gas to pass is interposed between the inlet 37a and the outer peripheral surface of the discharge portion 24f. As the relief valve 24, a discharge tube connected to the discharge port 24e can also be used. In this case, a discharge portion which is a tip portion of the discharge tube is inserted into the introduction port 37a of the collection container 37.

前記中和剤３５としては、ホウ酸顆粒のような顆粒状あるいは粉状の中和剤が好ましく、フィルタ３９としては、ポリエチレン製の不織布、その他多孔質で通気性に優れた素材が好ましい。圧力センサ２１からの圧力検出信号（電気信号）はコントローラ４１またはロガーなどに送られ、コントローラ４１内のメモリに圧力履歴として記録されるとともに、検出した圧力が所定圧力が所定値に達したとき、警報を発したり、関連する機器の動作を制限したりする。   The neutralizing agent 35 is preferably a granular or powdery neutralizing agent such as boric acid granules, and the filter 39 is preferably a non-woven fabric made of polyethylene or other porous material having excellent air permeability. A pressure detection signal (electrical signal) from the pressure sensor 21 is sent to the controller 41 or a logger, and is recorded as a pressure history in a memory in the controller 41. When the detected pressure reaches a predetermined value, Raise alarms or limit the operation of related equipment.

電池セルＣは、例えばニッケル水素電池であり、図２に示すように、偏平な直方体状の角形ニッケル水素電池である。この電池セルＣは、後述する電極体を電解液とともに収容する空間を形成する矩形の枠形部材５０と、この枠形部材５０の前後両面を覆う第１蓋部材５１および第２蓋部材５２とを有している。前記枠形部材５０の頂部には充放電時に電解液の反応から発生するガス（酸素、窒素）を排出するガス排出部５３が形成され、このガス排出部５３には二又のガス排出口５３ａ，５３ｂが設けられている。これらのガス排出口５３ａ，５３ｂのうち、一方のガス排出口５３ａに図１のチューブ１３が連結されている。図２の他方のガス排出口５３ｂは、二点鎖線で示すように電池セルＣを複数並べて使用する際に、隣接する電池セルＣのガス排出部５３と接続するのに使用される。   The battery cell C is, for example, a nickel hydride battery, and is a flat rectangular prismatic nickel hydride battery as shown in FIG. The battery cell C includes a rectangular frame-shaped member 50 that forms a space for accommodating an electrode body, which will be described later, together with an electrolytic solution, and a first lid member 51 and a second lid member 52 that cover both front and rear surfaces of the frame-shaped member 50. have. A gas discharge part 53 for discharging gas (oxygen, nitrogen) generated from the reaction of the electrolyte during charging / discharging is formed at the top of the frame-shaped member 50. The gas discharge part 53 has a bifurcated gas discharge port 53a. , 53b are provided. The tube 13 of FIG. 1 is connected to one of the gas outlets 53a and 53b. The other gas discharge port 53b in FIG. 2 is used to connect to the gas discharge portion 53 of the adjacent battery cell C when a plurality of battery cells C are used side by side as shown by a two-dot chain line.

図３は電池セルＣの一部断面した平面図である。同図に示すように、枠形部材５０は第１蓋部材５１の両側に形成された側部５１ａ，５１ａと、第２蓋部材５２の両側に形成された側部５２ａ，５２ａとに当接して支持され、枠形部材５０および第１蓋部材５１、第２蓋部材５２により形成された空間内に電極体６０を安定的に支持している。この電極体６０は、正極板５７と負極板５８とがプリーツ状ないしアコーディオン状に折り曲げられたセパレータ５９を介して交互に積層されて対向する積層構造を有している。   FIG. 3 is a plan view in which the battery cell C is partially sectioned. As shown in the figure, the frame-shaped member 50 abuts against the side portions 51 a and 51 a formed on both sides of the first lid member 51 and the side portions 52 a and 52 a formed on both sides of the second lid member 52. The electrode body 60 is stably supported in the space formed by the frame-shaped member 50, the first lid member 51, and the second lid member 52. The electrode body 60 has a laminated structure in which a positive electrode plate 57 and a negative electrode plate 58 are alternately laminated via separators 59 bent in a pleat shape or an accordion shape.

前記第１蓋部材５１を負極板５８に、第２蓋部材５２を正極板５７にそれぞれ接続しており、これにより、第１蓋部材５１、第２蓋部材５２は、それぞれ単位電池である電池セルＣの正極側端子および負極側端子として機能する。電池セルＣは、水酸化ニッケルを主要な正極活物質とし、水素吸蔵合金を主要な負極活物質とし、アルカリ系水溶液を電解液とする、繰り返し充放電が可能な二次電池として構成されている。   The first lid member 51 is connected to the negative electrode plate 58, and the second lid member 52 is connected to the positive electrode plate 57, whereby the first lid member 51 and the second lid member 52 are each a unit battery. It functions as a positive electrode side terminal and a negative electrode side terminal of the cell C. The battery cell C is configured as a secondary battery that can be repeatedly charged and discharged using nickel hydroxide as a main positive electrode active material, a hydrogen storage alloy as a main negative electrode active material, and an alkaline aqueous solution as an electrolyte. .

上記構成において、図１に示す圧力調整装置Ａを電池セルＣに接続して電池セルＣの内部を圧力センサ２１に連通させるにあたり、電池セルＣのガス排出部５３ａに接続されているチューブ１３と、圧力調整装置Ａに設けた導入ニップル１６に接続されているチューブ１２とを、コネクタ１４を介して連結する。これにより、第２のチューブ１３、コネクタ１４，第１のチューブ１２，導入ニップル１６、収納室２３および第１の中空ねじ体２７を通る、圧力導入通路１１の大部分が形成され、電池セルＣの内部圧力が圧力センサ２１に作用して圧力が検出される。圧力導入通路１１の残りの部分は第２の中空ねじ体２８により形成されて、リリーフ弁２４に圧力が導入されている。   In the above configuration, when connecting the pressure regulator A shown in FIG. 1 to the battery cell C and communicating the inside of the battery cell C with the pressure sensor 21, the tube 13 connected to the gas discharge part 53a of the battery cell C and The tube 12 connected to the introduction nipple 16 provided in the pressure adjusting device A is connected via the connector 14. Thereby, most of the pressure introduction passage 11 passing through the second tube 13, the connector 14, the first tube 12, the introduction nipple 16, the storage chamber 23 and the first hollow screw body 27 is formed, and the battery cell C The internal pressure acts on the pressure sensor 21 to detect the pressure. The remaining portion of the pressure introduction passage 11 is formed by the second hollow screw body 28, and pressure is introduced into the relief valve 24.

例えば充電時に、電池セルＣの内部圧力の増加により、電池セルＣからガスおよび電解液を含む流出物Ｂがチューブ１３、チューブ１２を通って緩衝器２２の収納室２３に入り込む。この収納室２３は圧力導入通路１１よりも通路面積が大きいので、流出物Ｂは、ここで速度が低下する。したがって、流出物Ｂに含まれた液体である電解液は、高速でミストセパレータ２９を通り抜けることなく、ミストセパレータ２９で効率的に捕獲される。電解液がミストセパレータ２９で捕獲され、取り除かれるので、圧力センサ２１のセンサ素子２１ｂは電解液に曝されて腐食するのが防止される。   For example, during charging, due to an increase in the internal pressure of the battery cell C, the effluent B containing gas and electrolyte from the battery cell C enters the storage chamber 23 of the buffer 22 through the tube 13 and the tube 12. Since the storage chamber 23 has a passage area larger than that of the pressure introduction passage 11, the speed of the effluent B is reduced here. Therefore, the electrolytic solution, which is the liquid contained in the effluent B, is efficiently captured by the mist separator 29 without passing through the mist separator 29 at high speed. Since the electrolytic solution is captured and removed by the mist separator 29, the sensor element 21b of the pressure sensor 21 is prevented from being corroded by being exposed to the electrolytic solution.

ここで、圧力センサ２１と緩衝器２２との連結および緩衝器２２とリリーフ弁２４との連結に、圧力導入通路１１の一部を形成する中空ねじ体２７，２８を用いているから、圧力センサ２１と緩衝器２２、または緩衝器２２とリリーフ弁２４とを連通させる通路部材を、別途設ける必要がなくなるので、部品点数を削減し、構造を簡素化することができる。また、通路拡張部である収納室２３にミストセパレータ２９が収納されることで、ミストセパレータ２９を収納するための大きな収納スペースを確保できる。   Here, since the hollow screw bodies 27 and 28 forming a part of the pressure introduction passage 11 are used for the connection between the pressure sensor 21 and the shock absorber 22 and the connection between the shock absorber 22 and the relief valve 24, the pressure sensor Since it is not necessary to separately provide a passage member for communicating the damper 21 and the shock absorber 22 or the shock absorber 22 and the relief valve 24, the number of parts can be reduced and the structure can be simplified. In addition, since the mist separator 29 is stored in the storage chamber 23 that is the passage expansion portion, a large storage space for storing the mist separator 29 can be secured.

圧力導入通路１１内の圧力が所定値に達したとき、リリーフ弁２４は、弁体２４ａが下方に押し下げられて開弁し、圧力導入通路１１内が減圧される。リリーフ弁２４の開弁により、圧力導入通路１１内の流出物Ｂが，第２の中空ねじ体２８を通過し、弁体２４ａから捕集容器３７内に排出される。捕集容器３７内には電解液を中和する所定量の中和剤３５が充填されているので、中和剤３５と電解液とが反応して電解液が中和される。このように、捕集容器３７内に電解液を捕集すると同時に捕集された電解液が速やかに中和されるので、捕集した電解液を別の処理装置に移し変える面倒な処理が不要となり、迅速かつ安価に中和処理できる。また、電解液が人体に触れて炎症を起こすおそれがなくなり、安全性が向上する。   When the pressure in the pressure introduction passage 11 reaches a predetermined value, the relief valve 24 is opened by the valve body 24a being pushed downward, and the pressure introduction passage 11 is decompressed. By opening the relief valve 24, the effluent B in the pressure introduction passage 11 passes through the second hollow screw body 28 and is discharged from the valve body 24 a into the collection container 37. Since the collection container 37 is filled with a predetermined amount of neutralizing agent 35 for neutralizing the electrolytic solution, the neutralizing agent 35 and the electrolytic solution react to neutralize the electrolytic solution. Thus, since the collected electrolytic solution is quickly neutralized at the same time as collecting the electrolytic solution in the collection container 37, a troublesome process of transferring the collected electrolytic solution to another processing apparatus is unnecessary. Thus, neutralization can be performed quickly and inexpensively. In addition, there is no risk that the electrolyte solution touches the human body to cause inflammation, and safety is improved.

前記捕集容器３７内には、流出物Ｂに含まれてガスも入り込み、捕集容器３７内の圧力を増大させるが、ガスは、導入口３７ａと排出部２４ｆの先端との間に介装されたフィルタ３９を通過して捕集容器３７外へ排出される。これにより、捕集容器３７内部も外気と同じ大気圧を維持でき、続いて捕集容器３７内に捕集される次の流出物Ｂに備えることができる。   The gas contained in the effluent B also enters the collection container 37 and increases the pressure in the collection container 37. The gas is interposed between the inlet 37a and the tip of the discharge part 24f. It passes through the filtered filter 39 and is discharged out of the collection container 37. Accordingly, the inside of the collection container 37 can be maintained at the same atmospheric pressure as the outside air, and can be prepared for the next effluent B subsequently collected in the collection container 37.

なお、本実施形態では電池セルＣをニッケル水素二次電池とした場合を示したが、各種の二次電池、例えばニッケルカドミウム電池などに適用することも可能である。   In the present embodiment, the case where the battery cell C is a nickel hydride secondary battery is shown, but the present invention can also be applied to various secondary batteries such as a nickel cadmium battery.

以上のとおり、図面を参照しながら好適な実施形態を説明したが、当業者であれば、本件明細書を見て、自明な範囲内で種々の変更および修正を容易に想定するであろう。したがって、そのような変更および修正は、添付のクレームから定まる本発明の範囲内のものと解釈される。   As described above, the preferred embodiments have been described with reference to the drawings. However, those skilled in the art will readily understand various changes and modifications within the obvious scope by looking at the present specification. Accordingly, such changes and modifications are to be construed as within the scope of the present invention as defined by the appended claims.

本発明に係る電池の圧力調整装置の断面図である。It is sectional drawing of the pressure regulator of the battery which concerns on this invention. 本発明に係る電池の圧力調整装置が適用される電池セルの斜視図である。1 is a perspective view of a battery cell to which a battery pressure adjusting device according to the present invention is applied. 電池セルを示す一部断面した平面図である。It is the top view which carried out the partial cross section which shows a battery cell.

符号の説明Explanation of symbols

１１ 圧力導入通路
１２，１３ チューブ
１４ コネクタ
１６ 導入ニップル
２１ 圧力センサ
２２ 緩衝器
２３ 収納室
２４ リリーフ弁
２４ｆ 排出部
２７，２８ 中空ねじ体
２９ ミストセパレータ
３５ 中和剤
３７ 捕集容器
３７ａ 導入口
３９ フィルタ
５１ 第１蓋部材
５２ 第２蓋部材
５３ ガス排出部
５３ａ，５３ｂ ガス排出口
Ａ 圧力調整装置
Ｂ 流出物
Ｃ 電池セル DESCRIPTION OF SYMBOLS 11 Pressure introduction path 12, 13 Tube 14 Connector 16 Introduction nipple 21 Pressure sensor 22 Buffer 23 Storage chamber 24 Relief valve 24f Discharge part 27, 28 Hollow screw body 29 Mist separator 35 Neutralizing agent 37 Collection container 37a Inlet 39 Filter 51 1st lid member 52 2nd lid member 53 Gas exhaust part 53a, 53b Gas exhaust port A Pressure regulator B Outflow C Battery cell

Claims (6)

電池セルの内部圧力を検出する圧力センサと、
前記電池セルを圧力センサに連通する圧力導入通路と、
前記圧力導入通路内に設けられて前記電池セルの電解液を捕獲するミストセパレータと、
を備えた電池の圧力調整装置。 A pressure sensor for detecting the internal pressure of the battery cell;
A pressure introduction passage communicating the battery cell with a pressure sensor;
A mist separator provided in the pressure introduction passage to capture the electrolyte of the battery cell;
A battery pressure adjusting device. 請求項１において、前記圧力導入通路に、通路拡張部を形成する収納室が設けられ、この収納室に前記ミストセパレータが収納されている電池の圧力調整装置。   The battery pressure regulating device according to claim 1, wherein a storage chamber that forms a passage expansion portion is provided in the pressure introduction passage, and the mist separator is stored in the storage chamber. 請求項２において、前記収納室を有する緩衝器と前記圧力センサとが前記圧力導入通路の一部を形成する中空ねじ体により連結され、前記緩衝器に、前記電池セルの内部に連通した前記圧力導入通路が接続されている電池の圧力調整装置。   3. The pressure according to claim 2, wherein the shock absorber having the storage chamber and the pressure sensor are connected by a hollow screw body that forms a part of the pressure introduction passage, and communicated with the shock absorber inside the battery cell. A battery pressure regulator to which the introduction passage is connected. 請求項１から３のいずれか一項において、さらに、前記圧力導入通路内の圧力が所定値に達したときに開弁して減圧するリリーフ弁と、前記リリーフ弁の開弁により排出された電解液を捕集する捕集容器とを備え、
前記捕集容器内に前記電解液を中和させる中和剤が装填されている電池の圧力調整装置。 4. The relief valve according to claim 1, further comprising a relief valve that opens and depressurizes when the pressure in the pressure introduction passage reaches a predetermined value, and electrolysis discharged by opening the relief valve. A collection container for collecting liquid,
A battery pressure adjusting device in which a neutralizing agent for neutralizing the electrolytic solution is loaded in the collection container. 請求項４において、前記リリーフ弁と前記緩衝器とが、前記圧力導入通路の一部を形成する中空ねじ体により連結されている電池の圧力調整装置。   The battery pressure adjusting device according to claim 4, wherein the relief valve and the shock absorber are connected by a hollow screw body forming a part of the pressure introduction passage. 請求項４または５において、前記リリーフ弁の排出口を形成する排出部が前記容器の導入口に挿入され、前記排出部と前記導入口との間に気体のみを通すフィルタが介装されている電池の圧力調整装置。   In Claim 4 or 5, the discharge part which forms the discharge port of the said relief valve is inserted in the inlet of the said container, The filter which lets only gas pass between the said outlet and the said inlet is interposed. Battery pressure regulator.
JP2008155480A 2008-06-13 2008-06-13 Pressure regulating device of battery Pending JP2009301888A (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016051683A (en) * 2014-09-02 2016-04-11 株式会社コベルコ科研 Secondary battery, and method for measuring gas generated in secondary battery
US10734623B2 (en) 2016-08-31 2020-08-04 Samsung Sdi Co., Ltd. Battery pack

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JPH11339747A (en) * 1998-05-29 1999-12-10 Honda Motor Co Ltd Gas exhaust device for battery
JP2000251865A (en) * 1999-02-25 2000-09-14 Toshiba Battery Co Ltd Cylindrical alkaline battery
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Publication number Priority date Publication date Assignee Title
JPS6259958U (en) * 1985-10-03 1987-04-14
JPH09120845A (en) * 1995-10-24 1997-05-06 Matsushita Electric Ind Co Ltd Sealed secondary battery
JPH11339747A (en) * 1998-05-29 1999-12-10 Honda Motor Co Ltd Gas exhaust device for battery
JP2000251865A (en) * 1999-02-25 2000-09-14 Toshiba Battery Co Ltd Cylindrical alkaline battery
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016051683A (en) * 2014-09-02 2016-04-11 株式会社コベルコ科研 Secondary battery, and method for measuring gas generated in secondary battery
US10734623B2 (en) 2016-08-31 2020-08-04 Samsung Sdi Co., Ltd. Battery pack

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