JP2021057166A - Power supply unit and method for producing the same - Google Patents

Power supply unit and method for producing the same Download PDF

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JP2021057166A
JP2021057166A JP2019178228A JP2019178228A JP2021057166A JP 2021057166 A JP2021057166 A JP 2021057166A JP 2019178228 A JP2019178228 A JP 2019178228A JP 2019178228 A JP2019178228 A JP 2019178228A JP 2021057166 A JP2021057166 A JP 2021057166A
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storage
power supply
exterior member
supply unit
gas
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道広 佐々木
Michihiro Sasaki
道広 佐々木
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Nippon Chemi Con Corp
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Nippon Chemi Con Corp
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Priority to JP2019178228A priority Critical patent/JP2021057166A/en
Priority to PCT/JP2020/030006 priority patent/WO2021065194A1/en
Publication of JP2021057166A publication Critical patent/JP2021057166A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/342—Non-re-sealable arrangements
    • 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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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Gas Exhaust Devices For Batteries (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

To provide a power supply unit capable of reducing the size thereof while sufficiently ensuring gas discharge performance.SOLUTION: A power supply unit includes: a storage section (4) where a plurality of case units (cell holders 4-1, 4-2, 4-3, ... 4-N) are stacked and a power storage cell (battery cell 6) is stored, the storage section having a gas discharge port (20) in a part of an exterior member (26) that covers a power storage element (power storing body 24) including an electrode body; and a discharge section (8) which is formed so as to separate a part of the storage section at the inside of the storage section, and in which a part of the exterior member including the gas discharge port is stored to discharge, through the storage section, gas discharged through the gas discharge port.SELECTED DRAWING: Figure 1

Description

本発明は、ケースユニットに収納された複数の電池セルのガス排出技術に関する。
The present invention relates to a gas discharge technique for a plurality of battery cells housed in a case unit.

ハイブリッドカーや電気自動車などの車載用の電源として、ラミネートフィルムなどの外装部材で覆われたキャパシタやリチウムイオン電池などの蓄電セルとして、たとえば電池セルが用いられる。このような電池セルは、異常時に発生するガスを外装部材の一部から排出させる手段が採用されている。
車載用の電源では複数個の電池セルを電源ユニットとしてモジュール化するためにケース内に収納されるが、いずれかの電池セルから発生したガスを所定の位置から排出させるとともに、このガスが他の電池セルに影響を与えるのを防止する必要がある。 For example, a battery cell is used as an in-vehicle power source for a hybrid car or an electric vehicle, or as a storage cell for a capacitor or a lithium ion battery covered with an exterior member such as a laminated film. In such a battery cell, a means for discharging the gas generated at the time of abnormality from a part of the exterior member is adopted.
In an in-vehicle power supply, a plurality of battery cells are housed in a case to be modularized as a power supply unit, but the gas generated from one of the battery cells is discharged from a predetermined position, and this gas is used as another. It is necessary to prevent the battery cells from being affected.

このような電源ユニットのガス排出に関し、組電池が収納された複数のモジュールケースが並べて配置されるとともに、このモジュールケースの外部に形成されたそれぞれのガス排出孔に、等間隔に形成された接続部を有する共通の排出管が組付けられたものがある（たとえば、特許文献１）。 Regarding the gas discharge of such a power supply unit, a plurality of module cases containing assembled batteries are arranged side by side, and connections formed at equal intervals to each gas discharge hole formed on the outside of the module case. There is one in which a common discharge pipe having a portion is assembled (for example, Patent Document 1).

特開２０１０−２８２８５４号Japanese Unexamined Patent Publication No. 2010-282854

車載用に用いられる電源ユニットには、小型化や軽量化が求められる。さらに、電源ユニットには、異常が発生した電池セルから発生したガスを設定された部分から外部に排出し、他の電池セルに影響を与えないようにする必要がある。このようなガス排出のために、電池セルを収納するケースユニットの外部に排出装置を設けるのでは、電源ユニットが大型化するという課題がある。
また、電池セルが高容量化または高電圧化しているため、異常時に発生するガスの放出量や放出圧力も大きくなっている。そのため、ガス排出経路の容積を十分に確保しつつ、気密性を十分に確保する必要があるという課題がある。 Power supply units used in vehicles are required to be smaller and lighter. Further, the power supply unit needs to discharge the gas generated from the battery cell in which the abnormality has occurred from the set portion to the outside so as not to affect other battery cells. For such gas discharge, if the discharge device is provided outside the case unit for accommodating the battery cells, there is a problem that the power supply unit becomes large.
Further, since the battery cell has a high capacity or a high voltage, the amount of gas released and the pressure released at the time of abnormality are also large. Therefore, there is a problem that it is necessary to secure sufficient airtightness while ensuring a sufficient volume of the gas discharge path.

斯かる課題について、特許文献１には開示や示唆はなく、特許文献１に開示された構成では斯かる課題を解決することができない。 Patent Document 1 does not disclose or suggest such a problem, and the configuration disclosed in Patent Document 1 cannot solve such a problem.

そこで、本発明の目的は、上記課題に鑑み、ガス放出性能を十分に確保しつつ、電源ユニットの小型化を図ることにある。
Therefore, an object of the present invention is to reduce the size of the power supply unit while sufficiently ensuring the outgassing performance in view of the above problems.

上記目的を達成するため、本開示の電源ユニットの一側面は、複数のケースユニットが積層されて、電極体を含む蓄電要素を覆う外装部材の一部にガス排出口を有する蓄電セルを収納する収納部と、前記収納部内にこの収納部の一部を区分するように形成されており、前記ガス排出口を含む前記外装部材の一部が収容されて前記ガス排出口から流出したガスを前記収納部から排出する排出部とを備える。 In order to achieve the above object, one side surface of the power supply unit of the present disclosure accommodates a power storage cell having a gas discharge port in a part of an exterior member in which a plurality of case units are laminated and covers a power storage element including an electrode body. A part of the storage part is formed so as to separate the storage part from the storage part, and a part of the exterior member including the gas discharge port is housed and the gas flowing out from the gas discharge port is referred to. It is provided with a discharge unit that discharges from the storage unit.

上記電源ユニットにおいて、前記ケースユニットに形成された立壁部が前記蓄電セルの外装部材の一部に備えたガス排出口を囲うように当接し、当該立壁部が蓄電セルのガス排出口を含む外装部材の一部を収容することで前記排出部を構成してよい。
上記電源ユニットにおいて、前記複数のケースユニットの積層によりケースユニットの間に前記収納部が形成されるとともに、前記積層されたケースユニットによって前記立壁部を介して前記ガス排出口の周囲の前記外装部材が挟持されてよい。
上記電源ユニットにおいて、前記ケースユニットは、前記蓄電セルの前記電極体を保持する保持部および前記外装部材の一部に接触させる第１の立壁部を備える収納面部と、該収納面部の他面側であり、隣接する他のケースユニットの第１の立壁部に対向して立設された第２の立壁部を備えており、他のケースユニットの収納面部と接合する蓋面部とを備え、前記収納面部と前記蓋面部との接合により、前記第１の立壁部と前記第２の立壁部との間に前記ガス排出口の周囲の前記外装部材が挟持されてよい。
上記電源ユニットにおいて、前記立壁部に、前記外装部材のガス排出手段の一部を収容する切り欠き部を備えてよい。 In the power supply unit, a vertical wall portion formed on the case unit abuts so as to surround a gas discharge port provided in a part of the exterior member of the power storage cell, and the vertical wall portion is an exterior including the gas discharge port of the power storage cell. The discharge portion may be configured by accommodating a part of the member.
In the power supply unit, the storage portion is formed between the case units by laminating the plurality of case units, and the exterior member around the gas discharge port is formed through the standing wall portion by the laminated case unit. May be pinched.
In the power supply unit, the case unit includes a storage surface portion including a holding portion for holding the electrode body of the power storage cell and a first standing wall portion that comes into contact with a part of the exterior member, and the other surface side of the storage surface portion. It is provided with a second standing wall portion which is erected so as to face the first standing wall portion of another adjacent case unit, and is provided with a lid surface portion which is joined to the storage surface portion of the other case unit. By joining the storage surface portion and the lid surface portion, the exterior member around the gas discharge port may be sandwiched between the first standing wall portion and the second standing wall portion.
In the power supply unit, the standing wall portion may be provided with a notch portion for accommodating a part of the gas discharging means of the exterior member.

上記電源ユニットにおいて、前記立壁部に押圧凸部を備えてよい。
上記電源ユニットにおいて、前記排出部は、前記蓄電セルの前記ガス排出口に対向する部分に、前記ガス排出口から放出されたガスに接触させる壁部と、前記壁部に接触したガスを外部に流す排出孔とを備えてよい。
上記電源ユニットにおいて、前記蓄電セルは、前記収納部に収納された前記外装部材であり、前記排出孔に対向する部分に前記ガスを通過させる通気孔を備えてよい。 In the power supply unit, the vertical wall portion may be provided with a pressing convex portion.
In the power supply unit, the discharge unit has a wall portion in contact with the gas discharged from the gas discharge port and a gas in contact with the wall portion to the outside in a portion of the storage cell facing the gas discharge port. It may be provided with a drain hole for flowing.
In the power supply unit, the power storage cell is the exterior member housed in the storage portion, and may be provided with a vent hole for passing the gas in a portion facing the discharge hole.

上記目的を達成するため、本開示の電源ユニットの製造方法の一側面は、複数のケースユニットを積層し、電極体を含む蓄電要素を覆う外装部材の一部にガス排出口を有する蓄電セルをケースユニットの収納部に収納する工程と、前記収納部内にこの収納部の一部を区分するように形成された排出部に前記ガス排出口を含む前記外装部材の一部が収容させる工程とを含んでよい。
In order to achieve the above object, one aspect of the method for manufacturing a power supply unit of the present disclosure is to provide a power storage cell in which a plurality of case units are stacked and a gas discharge port is provided as a part of an exterior member covering a power storage element including an electrode body. A step of storing the case unit in the storage portion and a step of accommodating a part of the exterior member including the gas discharge port in the discharge portion formed so as to divide a part of the storage portion in the storage portion. May include.

本発明によれば、次のいずれかの効果が得られる。
(1) 積層されたケースユニットの収納部の一部にガスの排出部を形成し、この排出部内に電池セルのガス排出口が形成された外装部材の一部を収容することで、電源ユニットが大型化するのを防止できる。
(2) ケースユニットの一面に立設した第１の立壁部と、このケースユニットに積層される他のケースユニットに形成された第２の立壁部とを接合して外装部材を挟持させることで、排出部の密閉性が確保できる。
(3) 立壁部の一部に切り欠き部を設けることで、外装部材のガス排出口を閉塞させず、排出部側へのガス排出経路を確保できる。
According to the present invention, any of the following effects can be obtained.
(1) A power supply unit by forming a gas discharge part in a part of the storage part of the laminated case unit and accommodating a part of the exterior member in which the gas discharge port of the battery cell is formed in this discharge part. Can be prevented from becoming large.
(2) By joining the first standing wall portion erected on one surface of the case unit and the second standing wall portion formed on the other case unit laminated on this case unit to sandwich the exterior member. , The airtightness of the discharge part can be ensured.
(3) By providing a notch in a part of the vertical wall, it is possible to secure a gas discharge path to the discharge part side without blocking the gas discharge port of the exterior member.

第１の実施の形態に係る電源ユニットの外観構成例を示す図である。It is a figure which shows the appearance composition example of the power supply unit which concerns on 1st Embodiment. セルホルダー毎に表した電源ユニットの組立図である。It is an assembly drawing of the power supply unit shown for each cell holder. 電池セルの構成例を示す図である。It is a figure which shows the structural example of a battery cell. Ａはセルホルダーの収納面部の構成例を示す図であり、Ｂは、セルホルダーの蓋面部の構成例を示す図である。A is a diagram showing a configuration example of a storage surface portion of the cell holder, and B is a diagram showing a configuration example of a lid surface portion of the cell holder. 電池セルを収納したセルホルダーの正面図である。It is a front view of the cell holder which housed a battery cell. 図５のＡ−Ａ線断面図である。FIG. 5 is a cross-sectional view taken along the line AA of FIG. 図５のＢ―Ｂ線断面図である。FIG. 5 is a cross-sectional view taken along the line BB of FIG. Ａは電池セルが正常状態のときのセルホルダーの積層断面図であり、Ｂは電池セルが異常状態のときの状態例におけるセルホルダーの積層断面図である。A is a laminated cross-sectional view of the cell holder when the battery cell is in a normal state, and B is a laminated cross-sectional view of the cell holder in a state example when the battery cell is in an abnormal state. Ａは正常時のガス排口を表す図５のＣ−Ｃ線断面図であり、Ｂは異常時のガス排出口を表す断面図である。A is a cross-sectional view taken along the line CC of FIG. 5 showing a gas discharge port in a normal state, and B is a cross-sectional view showing a gas discharge port in an abnormal state. 第２の実施の形態に係るセルホルダーの排出部を示す断面図である。It is sectional drawing which shows the discharge part of the cell holder which concerns on 2nd Embodiment. 電源ユニットの排出部の構成例を示す断面図である。It is sectional drawing which shows the structural example of the discharge part of a power supply unit.

〔第１の実施形態〕
図１は、第１の実施の形態に係る電源ユニットの外観構成例を示している。図１に示す構成は一例であり、斯かる構成に本発明が限定されない。
この電源ユニット２は、複数の電池セル６を収納する収納部４を備えた電源装置の一例であり、たとえば電池セル６毎または複数の電池セル６を並列もしくは直列に接続して電源を供給する手段である。収納部４は、たとえば電池セル６を収納する複数のセルホルダー４−１、４−２、４−３、・・・、４−Ｎが積層されている。セルホルダー４−１、４−２、４−３、・・・、４−Ｎには、それぞれ１つずつの電池セル６が収納されている。このセルホルダー４−１、４−２、４−３、・・・、４−Ｎは、本発明のケースユニットの一例であり、電源ユニット２の収納部４の構成部品であるとともに、電池セル６を保持する機能部品である。さらに電源ユニット２には、収納部４の内部に電池セル６から放出されたガスを収集し、電源ユニット２の外部に排出させる排出部８が形成されている。 [First Embodiment]
FIG. 1 shows an example of an external configuration of a power supply unit according to the first embodiment. The configuration shown in FIG. 1 is an example, and the present invention is not limited to such a configuration.
The power supply unit 2 is an example of a power supply device including a storage unit 4 for accommodating a plurality of battery cells 6. For example, each battery cell 6 or a plurality of battery cells 6 are connected in parallel or in series to supply power. It is a means. In the storage unit 4, for example, a plurality of cell holders 4-1, 4-2, 4-3, ..., 4-N for storing the battery cell 6 are laminated. One battery cell 6 is housed in each of the cell holders 4-1 and 4-2, 4-3, ..., 4-N. The cell holders 4-1 and 4-2, 4-3, ..., 4-N are examples of the case unit of the present invention, are components of the storage portion 4 of the power supply unit 2, and are battery cells. It is a functional component that holds 6. Further, the power supply unit 2 is formed with a discharge unit 8 that collects the gas discharged from the battery cell 6 inside the storage unit 4 and discharges the gas to the outside of the power supply unit 2.

電源ユニット２には、積層したセルホルダー４−１、４−２、４−３、・・・、４−Ｎの少なくとも終端面側を覆うカバーケース１０を備える。このカバーケース１０は、たとえば積層された終端のセルホルダー４−Ｎの一面を覆うことで、収納部４の外装カバーとして機能する。
なお、電源ユニット２は、セルホルダー４−１の外周端面側にもカバーケースを設置してもよい。 The power supply unit 2 includes a cover case 10 that covers at least the terminal surface side of the stacked cell holders 4-1, 4-2, 4-3, ..., 4-N. The cover case 10 functions as an exterior cover of the storage portion 4 by covering one surface of the stacked end cell holders 4-N, for example.
The power supply unit 2 may also be provided with a cover case on the outer peripheral end surface side of the cell holder 4-1.

セルホルダー４−１、４−２、４−３、・・・、４−Ｎおよびカバーケース１０には、それぞれ単一または複数のガス通気孔１２を備えている。電源ユニット２では、たとえばセルホルダー４−１、４−２、４−３、・・・、４−Ｎおよびカバーケース１０に形成されたガス通気孔１２が連通することでガスを排出する排出部８が構成される。 The cell holders 4-1 and 4-2, 4-3, ..., 4-N and the cover case 10 are each provided with a single or a plurality of gas vents 12. In the power supply unit 2, for example, a discharge unit that discharges gas by communicating the cell holders 4-1 and 4-2, 4-3, ..., 4-N and the gas ventilation holes 12 formed in the cover case 10. 8 is configured.

そのほかセルホルダー４−１、４−２、４−３、・・・、４−Ｎには、それぞれ両側に、電池セル６の端子部１４−１Ａ、１４−２Ａ、１４−３Ａ、・・・１４−ＮＡ、１４−１Ｂ、１４−２Ｂ、１４−３Ｂ・・・１４−ＮＢが配置されている。収納部４には、たとえば全ての電池セル６の同極を同方向に収納してもよく、または交互に極性を変えて収納してもよい。 In addition, the cell holders 4-1 and 4-2, 4-3, ..., 4-N have terminals 14-1A, 14-2A, 14-3A, ... 14-NA, 14-1B, 14-2B, 14-3B ... 14-NB are arranged. In the storage unit 4, for example, the same poles of all the battery cells 6 may be stored in the same direction, or the polarities may be alternately changed and stored.

＜セルホルダーの配置構成＞
図２は、電源ユニットの組立構成例を示している。
セルホルダー４−１、４−２、４−３、４−４・・・には、たとえば一面側に電池セル６を収納する収納面部１６を備えており、電池セル６の上面側を外部に露出させた状態で収納エリア内に収容している。また収納面部１６には、たとえば収納エリアの端部側の一部にガス排出部１８が形成されている。このガス排出部１８は、収納部４の排出部８の構成部の一例であって、一部にガス通気孔１２を備える。またガス排出部１８は、電池セル６に形成されたガス排出口２０に合せて形成され、またはガス排出口２０の位置に合わせて電池セル６が収納面部１６に配置される。また電池セル６は、ガス排出口２０の周縁部分であって、ガス排出部１８のガス通気孔１２と連通する位置にガス通気孔２２を備えている。このガス通気孔２２は、ガス排出部１８のガス通気孔１２を通過した排気ガスを通過させる通気経路の一例である。 <Arrangement configuration of cell holder>
FIG. 2 shows an example of an assembly configuration of the power supply unit.
The cell holders 4-1 and 4-2, 4-3, 4-4 ... Are provided with a storage surface portion 16 for accommodating the battery cell 6 on one side, for example, and the upper surface side of the battery cell 6 is exposed to the outside. It is housed in the storage area in an exposed state. Further, on the storage surface portion 16, for example, a gas discharge portion 18 is formed on a part of the storage area on the end side. The gas discharge unit 18 is an example of a constituent part of the discharge unit 8 of the storage unit 4, and is partially provided with a gas vent hole 12. Further, the gas discharge portion 18 is formed in accordance with the gas discharge port 20 formed in the battery cell 6, or the battery cell 6 is arranged in the storage surface portion 16 in accordance with the position of the gas discharge port 20. Further, the battery cell 6 is provided with a gas vent hole 22 at a position which is a peripheral portion of the gas discharge port 20 and communicates with the gas vent hole 12 of the gas discharge portion 18. The gas ventilation hole 22 is an example of a ventilation path through which the exhaust gas that has passed through the gas ventilation hole 12 of the gas discharge unit 18 passes.

電源ユニット２は、前後方向に対向して配置された各セルホルダー４−１、４−２、４−３、４−４・・・を積層していくことで、それぞれの収納面部１６内に収納部を形成するとともに、ガス排出部１８を連通させて排出部８が形成される。 The power supply unit 2 is formed in each storage surface portion 16 by stacking cell holders 4-1, 4-2, 4-3, 4-4 ... Arranged so as to face each other in the front-rear direction. The storage portion is formed, and the gas discharge portion 18 is communicated with each other to form the discharge portion 8.

＜電池セル６の構成例＞
図３は、電池セルの構成例を示している。
電池セル６は、たとえば図３に示すように、蓄電体２４をラミネートフィルム（外装部材２６）で覆うとともに、その端部を接合して熱溶着させたパウチ電池の一例であって、たとえばリチウムイオン電池などが含まれる。この蓄電体２４には、たとえば正極および負極の電極板やセパレータを介して積層もしくは巻回して成形したものなどが含まれる。また蓄電体２４には、それぞれの電極と接続する端子部１４−Ａ、１４−Ｂが設置されており、被覆された外装部材２６から導出されている。また電池セル６は、たとえば外装部材２６の接合部分の一部に溶着の強度を低下させて形成したガス排出口２０を含む弁機能部２８を備える。この弁機能部２８は、たとえば電池セル６の異常時に蓄電体２４からガスが発生したときに、蓄電体２４からガス排出口２０側に向けて溶着の剥離や破断が生じ易い脆弱部となっている。これにより電池セル６では、異常が発生した場合、発生したガスが蓄電体２４から弁機能部２８側に流れていき、ガス排出口２０またはその周辺部分から放出される。 <Configuration example of battery cell 6>
FIG. 3 shows a configuration example of a battery cell.
As shown in FIG. 3, the battery cell 6 is an example of a pouch battery in which the power storage body 24 is covered with a laminate film (exterior member 26) and the ends thereof are joined and heat-welded, for example, lithium ion. Batteries etc. are included. The storage body 24 includes, for example, those formed by laminating or winding through electrode plates and separators of positive and negative electrodes. Further, the storage body 24 is provided with terminal portions 14-A and 14-B connected to the respective electrodes, and is derived from the coated exterior member 26. Further, the battery cell 6 includes a valve function portion 28 including a gas discharge port 20 formed by reducing the welding strength in a part of the joint portion of the exterior member 26, for example. The valve function portion 28 becomes a fragile portion in which welding is likely to be peeled off or broken from the storage body 24 toward the gas discharge port 20 when gas is generated from the storage body 24, for example, when the battery cell 6 is abnormal. There is. As a result, in the battery cell 6, when an abnormality occurs, the generated gas flows from the storage body 24 to the valve function portion 28 side and is discharged from the gas discharge port 20 or a peripheral portion thereof.

＜セルホルダーの構成について＞
図４は、セルホルダーの構成例を示している。
セルホルダー４−１、４−２、４−３、・・・、４−Ｎは、たとえば図４のＡに示すように、一面側に前記電池セル６を収納する収納面部１６を備えるとともに、反対側の面に他のセルホルダー４−１、４−２、４−３、・・・、４−Ｎの収納面部１６に積層される蓋面部３０を備える。
収納面部１６には、たとえば少なくとも電池セル６の蓄電体２４を載置する載置面部３２、この載置面部３２の周囲に形成され電池セル６の外装部材２６の外縁周囲部分を載置させる載置部３３や載置面部３２の一端側に立設されたリブ３４を備える。載置面部３２は、電池セル６の底面側を載置するとともに、周面を包囲する収納壁４２により電池セル６を内部に収納する収納部４の一部を構成する。
リブ３４は、本発明の第１の立壁部の一例であり、載置面部３２の一部を区分するように矩形もしくは円形状に形成されている。リブ３４で区分された領域は、少なくとも電池セル６のガス排出口２０およびガス通気孔２２が配置される排気エリア３６を構成する。この排気エリア３６は、本発明の排出部８の一例である。この排気エリア３６の内部には、たとえば１または複数のガス通気孔１２、ガス排出口２０と対向する部分に配置される遮断面部４０を有する。この遮断面部４０は、電池セル６のガス排出口２０で排出されたガスに接触させ、ガス排出口２０から図示しない隣接するセルホルダー４−１、４−２、４−３、・・・、４−Ｎ側に向けて直接排出されないようにする機能部品の一例である。 <About the configuration of the cell holder>
FIG. 4 shows a configuration example of the cell holder.
The cell holders 4-1 and 4-2, 4-3, ..., 4-N are provided with a storage surface portion 16 for accommodating the battery cell 6 on one surface side, as shown in A of FIG. 4, for example. A lid surface portion 30 laminated on the storage surface portion 16 of the other cell holders 4-1, 4-2, 4-3, ..., 4-N is provided on the opposite surface.
On the storage surface portion 16, for example, at least a mounting surface portion 32 on which the power storage body 24 of the battery cell 6 is mounted, and a mounting surface portion around the outer edge of the exterior member 26 of the battery cell 6 formed around the mounting surface portion 32. A rib 34 erected on one end side of the placing portion 33 and the mounting surface portion 32 is provided. The mounting surface portion 32 forms a part of the storage portion 4 for storing the battery cell 6 inside by the storage wall 42 surrounding the peripheral surface while mounting the bottom surface side of the battery cell 6.
The rib 34 is an example of the first standing wall portion of the present invention, and is formed in a rectangular or circular shape so as to divide a part of the mounting surface portion 32. The region divided by the rib 34 constitutes at least an exhaust area 36 in which the gas discharge port 20 and the gas vent 22 of the battery cell 6 are arranged. The exhaust area 36 is an example of the exhaust unit 8 of the present invention. Inside the exhaust area 36, for example, one or a plurality of gas ventilation holes 12 and a blocking surface portion 40 arranged at a portion facing the gas discharge port 20 are provided. The blocking surface portion 40 is brought into contact with the gas discharged from the gas discharge port 20 of the battery cell 6, and the adjacent cell holders 4-1, 4-2, 4-3, ... Not shown from the gas discharge port 20 ... This is an example of a functional component that prevents direct discharge toward the 4-N side.

リブ３４には、上面側から所定の深さの切り欠き部３８を備える。この切り欠き部３８は、変形した弁機能部２８を収容する収容部の一例である。すなわち、弁機能部２８は、たとえば蓄電体２４で発生したガスにより膨張するなどの変形が生じる。このとき弁機能部２８は、一部または全部が切り欠き部３８内に収容され、その内部を通じてガスをガス排出口２０側に流す。
そのほか、収納面部１６には、たとえば収納壁４２の一部が分断され、電池セル６の端子部１４−Ａ、１４−Ｂをセルホルダー４−１、４−２、４−３、・・・、４−Ｎの外部に導出する導出部４４を備える。 The rib 34 is provided with a notch 38 having a predetermined depth from the upper surface side. The cutout portion 38 is an example of an accommodating portion that accommodates the deformed valve function portion 28. That is, the valve function unit 28 is deformed, for example, by being expanded by the gas generated by the storage body 24. At this time, a part or all of the valve function portion 28 is housed in the notch portion 38, and the gas flows to the gas discharge port 20 side through the inside thereof.
In addition, for example, a part of the storage wall 42 is divided into the storage surface portion 16, and the terminal portions 14-A and 14-B of the battery cell 6 are connected to the cell holders 4-1, 4-2, 4-3, ... , 4-N includes a lead-out unit 44 that leads out to the outside.

セルホルダー４−１、４−２、４−３、・・・、４−Ｎの蓋面部３０は、接合する他のセルホルダー４−１、４−２、４−３、・・・、４−Ｎの収納面部１６と接合して、収納部４を形成する構成部品の一例であり、たとえば図４のＢに示すように、リブ３４の背面側に同様の面積の排気エリア３６を形成するリブ４６が形成されている。このリブ４６は、本発明の第２の立壁部の一例であり、積層される他のセルホルダー４−１、４−２、４−３、・・・、４−Ｎの収納面部１６のリブ３４と対向する位置であり、このリブ３４と接合する高さに形成されている。
そのほか蓋面部３０には、たとえば他のセルホルダー４−１、４−２、４−３、・・・、４−Ｎの載置部３３と接合する接合部４３や、収納面部１６の導出部４４と対向する位置に、一部を切り欠いて形成された導出部４８を備える。この導出部４８は、電池セル６の端子部１４−Ａ、１４−Ｂの一面を覆い、または接触する。 The lid surface 30 of the cell holders 4-1 and 4-2, 4-3, ..., 4-N is the other cell holders 4-1, 4-2, 4-3, ..., 4 to be joined. This is an example of a component component that is joined to the storage surface portion 16 of −N to form the storage portion 4. For example, as shown in B of FIG. 4, an exhaust area 36 having a similar area is formed on the back surface side of the rib 34. The rib 46 is formed. This rib 46 is an example of the second standing wall portion of the present invention, and is a rib of a storage surface portion 16 of other cell holders 4-1, 4-2, 4-3, ..., 4-N to be laminated. It is a position facing the 34 and is formed at a height at which the rib 34 is joined.
In addition, the lid surface portion 30 includes, for example, a joint portion 43 for joining with the mounting portions 33 of other cell holders 4-1, 4-2, 4-3, ..., 4-N, and a lead-out portion for the storage surface portion 16. A lead-out unit 48 formed by cutting out a part thereof is provided at a position facing the 44. The lead-out portion 48 covers or contacts one surface of the terminal portions 14-A and 14-B of the battery cell 6.

＜電池セルが収納された状態について＞
図５、図６、図７は、電池セルを収納したセルホルダーの構成例を示している。
セルホルダー４−１、４−２、４−３、・・・、４−Ｎの収納面部１６は、たとえば図５に示すように電池セル６の外装部材２６と同等の面積で形成されている。また電池セル６は、外装部材２６の接合部分の一部がリブ３４の頂面上に載置されており、ガス排出口２０やガス通気孔２２および弁機能部２８がリブ３４で区分けされた排気エリア３６上を覆うように配置される。
電池セル６は、たとえば図６に示すように外装部材２６で覆われた蓄電体２４が載置面部３２上に載置されるとともに、蓄電体２４の周囲にある外装部材２６の接合部分が収納面部１６の周面部分に形成された載置部３３やリブ３４に載置されている。このとき電池セル６の弁機能部２８は、たとえばその一部または全部がリブ３４に形成された切り欠き部３８上に配置されており、外装部材２６の内部で発生したガスの圧力に対し、切り欠き部３８内に向けて変形可能となっている。
リブ３４で包囲された排気エリア３６には、ガス排出口２０と対向面側に遮断面部４０を備えており、ガス排出口２０や弁機能部２８から排気エリア３６内に流入したガスが蓋面部３０側に直接排出させない構成となっている。 <About the state where the battery cell is stored>
5, FIG. 6 and FIG. 7 show a configuration example of a cell holder accommodating a battery cell.
The storage surface portions 16 of the cell holders 4-1 and 4-2, 4-3, ..., 4-N are formed in an area equivalent to the exterior member 26 of the battery cell 6, for example, as shown in FIG. .. Further, in the battery cell 6, a part of the joint portion of the exterior member 26 is placed on the top surface of the rib 34, and the gas exhaust port 20, the gas vent hole 22, and the valve function portion 28 are separated by the rib 34. It is arranged so as to cover the exhaust area 36.
In the battery cell 6, for example, as shown in FIG. 6, the power storage body 24 covered with the exterior member 26 is mounted on the mounting surface portion 32, and the joint portion of the exterior member 26 around the power storage body 24 is housed in the battery cell 6. It is mounted on a mounting portion 33 or a rib 34 formed on a peripheral surface portion of the surface portion 16. At this time, the valve function portion 28 of the battery cell 6 is arranged, for example, on a notch portion 38 formed in a rib 34 in part or in whole, and with respect to the pressure of the gas generated inside the exterior member 26. It can be deformed toward the inside of the notch 38.
The exhaust area 36 surrounded by the ribs 34 is provided with a cutoff surface portion 40 on the side facing the gas discharge port 20, and the gas flowing into the exhaust area 36 from the gas discharge port 20 and the valve function portion 28 is a lid surface portion. It is configured so that it is not directly discharged to the 30 side.

またガス通気孔１２は、たとえば図７に示すように、電池セル６の接合部分に形成されたガス通気孔２２が対向して配置されており、ガス排出口２０から排気エリア３６内に放出されたガスがガス通気孔１２、２２を通じて排出される。
そのほか、セルホルダー４−１、４−２、４−３、・・・、４−Ｎの蓋面部３０は、たとえば収納面部１６の載置面部３２と同等の面積で形成されるほか、載置面部３２を挟んでリブ３４と反対方向にリブ４６が立設されている。このリブ４６の高さＬ２は、たとえばリブ３４の高さＬ１と同等またはそれよりも長く（Ｌ１≦Ｌ２）なるように形成されている。このようにリブ３４、４６の長さを設定することで、セルホルダー４−１、４−２、４−３、・・・、４−Ｎの接合したときにリブ３４、４６の頂面部同士が所定の接触圧力を付加することができる。 Further, as shown in FIG. 7, for example, the gas vent holes 12 are arranged so that the gas vents 22 formed at the joint portion of the battery cell 6 face each other, and are discharged from the gas discharge port 20 into the exhaust area 36. The gas is discharged through the gas vents 12 and 22.
In addition, the lid surface portion 30 of the cell holders 4-1 and 4-2, 4-3, ..., 4-N is formed in an area equivalent to, for example, the mounting surface portion 32 of the storage surface portion 16, and is also mounted. The rib 46 is erected in the direction opposite to the rib 34 with the face portion 32 interposed therebetween. The height L2 of the rib 46 is formed so as to be equal to or longer than the height L1 of the rib 34 (L1 ≦ L2), for example. By setting the lengths of the ribs 34 and 46 in this way, the top surfaces of the ribs 34 and 46 are joined to each other when the cell holders 4-1 and 4-2, 4-3, ..., 4-N are joined. Can apply a predetermined contact pressure.

＜セルホルダー４−（Ｘ−１）、４−Ｘ、４−（Ｘ＋１）を積層した状態について＞
ここでは、電源ユニット２の一部として、セルホルダー４−（Ｘ−１）、４−Ｘ、４−（Ｘ＋１）を抽出して説明する。電源ユニット２には、たとえば図８のＡに示すように、各セルホルダー４−（Ｘ−１）、４−Ｘ、４−（Ｘ＋１）が積層されると、収納面部１６の載置部３３と蓋面部３０の接合部４３とが接合すると、これらの間に電池セル６毎の収納部４が形成される。さらに電源ユニット２の排出部８は、対向するリブ３４、４６の接合によりそれぞれの排気エリア３６が連通することで形成される。
なお、排出部８は、たとえば電池セル６の配置方向により、全ての排気エリア３６のガス通気孔１２と電池セル６のガス排出口２０が直線上で連通する場合のほか、排気エリア３６内でセルホルダー４−（Ｘ−１）、４−Ｘ、４−（Ｘ＋１）毎にガス排出口２０の配置位置が異なっている場合も含まれる。
さらに、電源ユニット２の排出部８は、セルホルダー４−（Ｘ−１）、４−Ｘ、４−（Ｘ＋１）の積層により対向するリブ３４、４６が接合することで、リブ３４の頂面上に載置された外装部材２６の接合面の一部を挟持する。これにより、電池セル６は、たとえばリブ３４、４６で挟持された部分が所定の圧力で押圧されて、外装部材２６で覆われた蓄電体２４と排気エリア３６内に配置された部分が遮断される。また排出部８は、各排気エリア３６は、リブ３４、４６の接合により収納部４に対する密閉性が確保できる。 <About the state where cell holders 4- (X-1), 4-X, 4- (X + 1) are stacked>
Here, cell holders 4- (X-1), 4-X, and 4- (X + 1) will be extracted and described as a part of the power supply unit 2. When the cell holders 4- (X-1), 4-X, 4- (X + 1) are laminated on the power supply unit 2, for example, as shown in A of FIG. 8, the mounting portion 33 of the storage surface portion 16 is formed. When the joint portion 43 of the lid surface portion 30 is joined, a storage portion 4 for each battery cell 6 is formed between them. Further, the exhaust portion 8 of the power supply unit 2 is formed by joining the ribs 34 and 46 facing each other so that the respective exhaust areas 36 communicate with each other.
In addition, in the discharge unit 8, for example, depending on the arrangement direction of the battery cell 6, the gas vent holes 12 of all the exhaust areas 36 and the gas discharge port 20 of the battery cell 6 communicate with each other in a straight line, and in the exhaust area 36, for example. The case where the arrangement position of the gas discharge port 20 is different for each of the cell holders 4- (X-1), 4-X, 4- (X + 1) is also included.
Further, the discharge portion 8 of the power supply unit 2 is formed by laminating the cell holders 4- (X-1), 4-X, 4- (X + 1) and joining the opposing ribs 34 and 46 to the top surface of the rib 34. A part of the joint surface of the exterior member 26 placed on the top is sandwiched. As a result, in the battery cell 6, for example, the portion sandwiched between the ribs 34 and 46 is pressed by a predetermined pressure, and the storage body 24 covered with the exterior member 26 and the portion arranged in the exhaust area 36 are cut off. To. Further, in the exhaust portion 8, each exhaust area 36 can be hermetically sealed to the storage portion 4 by joining the ribs 34 and 46.

また収納部４では、たとえば図８のＢに示すように一部の電池セル６Ｘに異常が発生し、蓄電体２４を覆った外装部材２６の内部にガスが発生している。このとき外装部材２６は、一方のセルホルダーの収納面部１６と、対向するセルホルダーの蓋面部３０との間に形成される容積に応じて膨張状態となる。電池セル６が収納される領域の容積は、たとえばリブ３４の高さＬ１とリブ４６の高さＬ２とが接合する高さに応じて設定される。
リブ３４、４６が接合した排気エリア３６では、電池セル６の弁機能部２８を通じて流入し、ガス排出口２０から排出されたガスがガス通気孔１２、２２を通じて隣接する排気エリア３６を通過して、電源ユニット２の外部に排出される。 Further, in the storage unit 4, for example, as shown in FIG. 8B, an abnormality has occurred in a part of the battery cells 6X, and gas is generated inside the exterior member 26 that covers the power storage body 24. At this time, the exterior member 26 is in an expanded state according to the volume formed between the storage surface portion 16 of one cell holder and the lid surface portion 30 of the facing cell holder. The volume of the area in which the battery cell 6 is housed is set according to, for example, the height at which the height L1 of the rib 34 and the height L2 of the rib 46 are joined.
In the exhaust area 36 to which the ribs 34 and 46 are joined, the gas that flows in through the valve function portion 28 of the battery cell 6 and is discharged from the gas discharge port 20 passes through the adjacent exhaust area 36 through the gas vents 12 and 22. , Is discharged to the outside of the power supply unit 2.

リブ３４、４６の接合面に挟持された外装部材２６は、たとえば図９のＡに示すように、その一部がリブ３４、４６に形成された切り欠き部３８内に配置されている。このとき外装部材２６は、リブ３４、４６に挟持された部分が対向方向に押圧されて遮断状体となっているのに対し、切り欠き部３８内に配置された部分には圧力から開放されている。外装部材２６は、たとえば少なくとも切り欠き部３８に内に配置される部分およびガス排出口２０を含む部分について、外装部材２６同士の接合を脆弱化した弁機能部２８となっている。これにより外装部材２６は、たとえば図９のＢに示すように電池セル６の蓄電体２４の異常によりガスが発生すると、蓄電体２４側からの負荷される膨張圧力により切り欠き部３８内に配置された部分が変形して開弁部Ｏとなる。そして電池セル６では、たとえば外装部材２６の内部において、蓄電体２４側から開弁部Ｏ側に向けてガスが流動し、ガス排出口２０から排気エリア３６側にガスが流される。
なお、弁機能部２８は、蓄電体２４側でガスが発生した場合、開弁部Ｏのように接合部分の一部が開口する場合に限られず、切り欠き部３８内やその周囲において外装部材２６の一部が破裂する場合ある。 A part of the exterior member 26 sandwiched between the joint surfaces of the ribs 34 and 46 is arranged in the notch 38 formed in the ribs 34 and 46, as shown in FIG. 9A, for example. At this time, the exterior member 26 is formed as a blocking body by pressing the portions sandwiched between the ribs 34 and 46 in the opposite direction, whereas the portion arranged in the notch 38 is released from the pressure. ing. The exterior member 26 is a valve function portion 28 in which the joint between the exterior members 26 is weakened, for example, at least for a portion arranged inside the notch portion 38 and a portion including the gas discharge port 20. As a result, when gas is generated due to an abnormality in the storage body 24 of the battery cell 6, for example, as shown in B of FIG. 9, the exterior member 26 is arranged in the notch 38 due to the expansion pressure applied from the storage body 24 side. The formed portion is deformed to become the valve opening portion O. Then, in the battery cell 6, for example, inside the exterior member 26, gas flows from the power storage body 24 side toward the valve opening portion O side, and the gas flows from the gas discharge port 20 to the exhaust area 36 side.
The valve function portion 28 is not limited to the case where a part of the joint portion is opened as in the valve opening portion O when gas is generated on the power storage body 24 side, and the valve function portion 28 is an exterior member in or around the notch portion 38. Part of 26 may burst.

＜電源ユニット２の製造処理＞
次に、電源ユニット２の製造処理例を説明する。ここに示す製造処理は、電源ユニットの製造方法の一例であり、斯かる処理内容に本発明が限定されない。
電源ユニット２の製造処理では、たとえば以下のような工程が含まれる。
（ａ）複数のセルホルダー４−１、４−２、４−３、・・・、４−Ｎに対し、電池セル６を載置する。このとき、電池セル６のガス排出口２０をセルホルダー４−１、４−２、４−３、・・・、４−Ｎに形成された排気エリア３６（図４Ａ）の形成位置に合せるとともに、ガス通気孔１２、２２を対向させる。
（ｂ）電池セル６が設置されたセルホルダー４−１、４−２、４−３、・・・、４−Ｎを積層して、内部に収納部４および排出部８を形成する。このとき排出部８内には、各電池セル６のガス排出口２０およびその周囲部分を含む外装部材２６（図３）が収容される。
（ｃ）さらに、セルホルダー４−１、４−２、４−３、・・・、４−Ｎの収納面部１６側に立設されたリブ３４の頂面上に電池セル６の外装部材２６の一部を載置し、隣り合ったセルホルダー４−１、４−２、４−３、・・・、４−Ｎの対向面側にある蓋面部３０に形成されたリブ４６と接合させる。これによりリブ３４、４６が頂面部同士が接合すると、その接合面間に配置された外装部材２６を挟持させる。 <Manufacturing process of power supply unit 2>
Next, an example of manufacturing processing of the power supply unit 2 will be described. The manufacturing process shown here is an example of a method for manufacturing a power supply unit, and the present invention is not limited to such processing contents.
The manufacturing process of the power supply unit 2 includes, for example, the following steps.
(A) The battery cell 6 is placed on the plurality of cell holders 4-1 and 4-2, 4-3, ..., 4-N. At this time, the gas discharge port 20 of the battery cell 6 is aligned with the formation position of the exhaust area 36 (FIG. 4A) formed in the cell holders 4-1, 4-2, 4-3, ..., 4-N. , Gas vents 12 and 22 are opposed to each other.
(B) Cell holders 4-1, 4-2, 4-3, ..., 4-N in which the battery cell 6 is installed are laminated to form a storage portion 4 and a discharge portion 8 inside. At this time, the exterior member 26 (FIG. 3) including the gas discharge port 20 of each battery cell 6 and its peripheral portion is housed in the discharge unit 8.
(C) Further, the exterior member 26 of the battery cell 6 is placed on the top surface of the rib 34 erected on the storage surface 16 side of the cell holders 4-1 and 4-2, 4-3, ..., 4-N. Is placed and joined to the rib 46 formed on the lid surface portion 30 on the facing surface side of the adjacent cell holders 4-1, 4-2, 4-3, ..., 4-N. .. As a result, when the top surfaces of the ribs 34 and 46 are joined to each other, the exterior member 26 arranged between the joint surfaces is sandwiched.

＜第１の実施の形態の効果＞
斯かる構成によれば、次のいずれかのような効果が期待できる。
(1) 収納部４内の一部にガスの排出部８を形成することで、ガス排出経路による電源ユニット２の大型化を防止できるとともに、電源ユニット２を設置する空間の省スペース化が図れる。
(2) 電池セル６の排出口を含む部分を収納部４内に形成された排出部８内に配置させることで、電池セル６から放出されるガスを直接排出部８側に取り出すことができ、排出部８までの経路の簡略および短縮化により小型化および計量化を図るとともに排気機能の向上が図れる。
(3) セルホルダー４−１、４−２、４−３、・・・、４−Ｎの両面の対向位置に所定長さのリブ３４、４６を形成し、積層によりリブ３４、４６を接合させることで、電池セル６を収納する領域と排気エリア３６との遮断性が保持できる。
(4) 接合するリブ３４、４６の間に外装部材２６を挟持させることで、蓄電体２４で発生したガスが収納エリア側に放出されるのを防止できる。
(5) リブ３４、４６の一部に切り欠き部３８を形成し、この内部に外装部材２６の弁機能部２８を配置させることで、弁機能部２８を通じて蓄電体２４で発生したガスを排気エリア３６側に導くことができる。 <Effect of the first embodiment>
According to such a configuration, one of the following effects can be expected.
(1) By forming the gas discharge part 8 in a part of the storage part 4, it is possible to prevent the power supply unit 2 from becoming large due to the gas discharge path and to save space for installing the power supply unit 2. ..
(2) By arranging the portion including the discharge port of the battery cell 6 in the discharge portion 8 formed in the storage portion 4, the gas discharged from the battery cell 6 can be taken out directly to the discharge portion 8 side. By simplifying and shortening the route to the discharge unit 8, the size and measurement can be reduced and the exhaust function can be improved.
(3) Ribs 34 and 46 having a predetermined length are formed at opposite positions on both sides of the cell holders 4-1 and 4-2, 4-3, ..., 4-N, and the ribs 34 and 46 are joined by laminating. By doing so, the barrier property between the area for accommodating the battery cell 6 and the exhaust area 36 can be maintained.
(4) By sandwiching the exterior member 26 between the ribs 34 and 46 to be joined, it is possible to prevent the gas generated in the power storage body 24 from being released to the storage area side.
(5) By forming a notch 38 in a part of the ribs 34 and 46 and arranging the valve function 28 of the exterior member 26 inside the notch 38, the gas generated in the power storage body 24 is exhausted through the valve function 28. It can be guided to the area 36 side.

〔第２の実施の形態〕
図１０は、第２の実施の形態に係る電源ユニットのセルホルダー４−１、４−２、４−３、・・・、４−Ｎの構成例を示している。図１０に示す構成は一例であり、斯かる構成に本発明が限定されない。また図１０において、図１、図６、図７等と同一部分には同一の符号を付している。
この電源ユニット２は、第１の実施の形態と同様に、積層した複数のセルホルダー４−１、４−２、４−３、・・・、４−Ｎにおいて、隣り合う収納面部１６と蓋面部３０との間に電池セル６が配置される収納部が形成される。またセルホルダー４−１、４−２、４−３、・・・、４−Ｎには、収納部を構成する収納面部１６と蓋面部３０の一部にリブ３４、４６を立設し、リブ３４、４６によって区分けされた領域を排気エリア３６として利用する。そして、電源ユニット２では、連通した排気エリア３６によりガスを排出する排出部８が形成される。
この実施の形態のリブ３４、４６は、たとえば図１０に示すように、電池セル６の外装部材２６の一部が載置される頂面部に凹部５０または凸部５２が形成されている。この凸部５２は、本発明の押圧凸部の一例である。また、凹部５０は、この凸部５２と嵌合する嵌合部の一例であり、セルホルダー４−１、４−２、４−３、・・・、４−Ｎの積層によりリブ３４、４６の接合時に嵌合状態となる。凹部５０の開口幅および深さは、凸部５２の突出幅および突出長さと同等またはこれに近い大きさであり、嵌合時に密着状態となるように設定されている。 [Second Embodiment]
FIG. 10 shows a configuration example of cell holders 4-1, 4-2, 4-3, ..., 4-N of the power supply unit according to the second embodiment. The configuration shown in FIG. 10 is an example, and the present invention is not limited to such a configuration. Further, in FIG. 10, the same parts as those in FIGS. 1, 6, 7, and 7 are designated by the same reference numerals.
Similar to the first embodiment, the power supply unit 2 has a lid and a storage surface portion 16 adjacent to each other in a plurality of stacked cell holders 4-1, 4-2, 4-3, ..., 4-N, as in the first embodiment. A storage portion in which the battery cell 6 is arranged is formed between the surface portion 30 and the surface portion 30. Further, in the cell holders 4-1 and 4-2, 4-3, ..., 4-N, ribs 34 and 46 are erected on a part of the storage surface portion 16 and the lid surface portion 30 constituting the storage portion. The area divided by the ribs 34 and 46 is used as the exhaust area 36. Then, in the power supply unit 2, an exhaust unit 8 for discharging gas is formed by an exhaust area 36 that communicates with the power supply unit 2.
As shown in FIG. 10, for example, the ribs 34 and 46 of this embodiment have a concave portion 50 or a convex portion 52 formed on a top surface portion on which a part of the exterior member 26 of the battery cell 6 is placed. The convex portion 52 is an example of the pressing convex portion of the present invention. Further, the concave portion 50 is an example of a fitting portion that fits with the convex portion 52, and the ribs 34, 46 are formed by laminating the cell holders 4-1, 4-2, 4-3, ..., 4-N. It will be in a mated state at the time of joining. The opening width and depth of the concave portion 50 are equal to or close to the protruding width and protruding length of the convex portion 52, and are set so as to be in close contact with each other at the time of fitting.

積層されたセルホルダー４−（Ｘ−１）、４−Ｘ、４−（Ｘ＋１）では、たとえば図１１に示すように、接合したリブ４６の凸部５２によりリブ３４上に配置された電池セル６の外装部材２６が押圧されて変形し、それぞれの凹部５０内に挿入される。このとき外装部材２６は、嵌合する凸部５２と凹部５０の形状に沿って変形しており、リブ３４、４６の接合部分に外装部材２６が密着状態となる。
この凹部５０および凸部５２は、たとえばリブ３４、４６の頂面上であって、図示しない切り欠き部３８を除いた部分の全体またはその一部に形成されてよい。 In the stacked cell holders 4- (X-1), 4-X, 4- (X + 1), for example, as shown in FIG. 11, the battery cells arranged on the rib 34 by the convex portion 52 of the joined rib 46. The exterior member 26 of No. 6 is pressed and deformed, and is inserted into each of the recesses 50. At this time, the exterior member 26 is deformed along the shapes of the convex portion 52 and the concave portion 50 to be fitted, and the exterior member 26 is in close contact with the joint portion of the ribs 34 and 46.
The concave portion 50 and the convex portion 52 may be formed on, for example, the top surfaces of the ribs 34 and 46, and may be formed as a whole or a part thereof except for the notch portion 38 (not shown).

＜第２の実施の形態の効果＞
斯かる構成によれば、以下のいずれかの効果が得られる。
(1) 上記第１の実施の形態と同様の構成を含むので、電源ユニット２の小型化や軽量化が実現できる。
(2) 外装部材２６を挟持するリブ３４、４６の接合面に形成した凹部５０と凸部５２を嵌合させることで、排気エリア３６で構成される排出部８と、積層されたセルホルダー４−１、４−２、４−３、・・・、４−Ｎで構成される収納部４との間の密閉性が確保できる。
そして、排出部８の密閉性が確保されることで、一部の電池セル６に異常が発生した場合でも、排出部８を通じて流されるガスが他の電池セル６に影響を与えることがない。
(3) 凹部５０と凸部５２の嵌合部分に外装部材２６が入り込むことで、セルホルダー４−１、４−２、４−３、・・・、４−Ｎ同士の接合性が向上する。 <Effect of the second embodiment>
According to such a configuration, one of the following effects can be obtained.
(1) Since the configuration is the same as that of the first embodiment, the power supply unit 2 can be reduced in size and weight.
(2) By fitting the concave portion 50 and the convex portion 52 formed on the joint surface of the ribs 34 and 46 that sandwich the exterior member 26, the exhaust portion 8 composed of the exhaust area 36 and the laminated cell holder 4 are laminated. The airtightness between the storage unit 4 composed of -1, 4-2, 4-3, ..., 4-N can be ensured.
Then, by ensuring the airtightness of the discharge unit 8, even if an abnormality occurs in a part of the battery cells 6, the gas flowing through the discharge unit 8 does not affect the other battery cells 6.
(3) By inserting the exterior member 26 into the fitting portion between the concave portion 50 and the convex portion 52, the bondability between the cell holders 4-1 and 4-2, 4-3, ..., 4-N is improved. ..

〔他の実施の形態〕
以上説明した実施の形態について、その変形例を列挙する。
(1) 上記実施の形態では、全てのリブ３４、４６の一部に切り欠き部３８が形成される場合を示したがこれに限らない。セルホルダー４−１、４−２、４−３、・・・、４−Ｎには、たとえば収納面部１６側のリブ３４または蓋面部３０側のリブ４６のいずれか一方に切り欠き部３８が形成される場合であってもよい。
斯かる構成によっても、ガスが発生して膨張した外装部材２６の一部が、近傍に形成された切り欠き部３８に追従して変形可能となることで弁機能部２８として機能することができる。 [Other Embodiments]
The modified examples of the embodiments described above are listed.
(1) In the above embodiment, the case where the cutout portion 38 is formed in a part of all the ribs 34 and 46 is shown, but the present invention is not limited to this. The cell holders 4-1 and 4-2, 4-3, ..., 4-N have notches 38 in either the rib 34 on the storage surface 16 side or the rib 46 on the lid 30 side, for example. It may be formed.
Even with such a configuration, a part of the exterior member 26 that has expanded due to the generation of gas can be deformed following the notch 38 formed in the vicinity, so that it can function as the valve function portion 28. ..

(2) 上記実施の形態では、リブ３４、４６の側面に形成される切り欠き部３８が常時開放状態となっている場合を示したがこれに限らない。切り欠き部３８には、たとえば内部に変形可能な弁部材が設置されてもよい。この弁部材は、たとえば樹脂などの変形可能な材料で形成されており、電池セル６が通常状態のときは切り欠き部３８の開口部分を閉塞し、電池セル６の異常による弁機能部２８の膨張変形に追従して切り欠き部３８内で押し潰されて切り欠き部３８を開状態にする構成である。
斯かる構成によれば、リブ３４、４６で形成される排気エリア３６と収納部４との密閉性を向上させることができる。 (2) In the above embodiment, the case where the notch 38 formed on the side surface of the ribs 34 and 46 is always open is shown, but the present invention is not limited to this. For example, a deformable valve member may be installed in the notch 38. This valve member is made of a deformable material such as resin, and when the battery cell 6 is in a normal state, the opening portion of the notch 38 is closed, and the valve function portion 28 due to an abnormality in the battery cell 6 It is configured to follow the expansion and deformation and be crushed in the notch 38 to open the notch 38.
According to such a configuration, the airtightness between the exhaust area 36 formed by the ribs 34 and 46 and the storage portion 4 can be improved.

(3) 上記実施の形態では、リブ３４、４６に形成される切り欠き部３８の開口形状が円形もしくは半円径、またはそれに近い形状であり、開口幅が一定の場合を示したがこれに限らない。切り欠き部３８は、たとえば収納部４から排気エリア３６に向けて開口幅を異ならせたものや、円形、半円形以外の形状に開口したものであってもよい。 (3) In the above embodiment, the case where the opening shape of the notch 38 formed in the ribs 34 and 46 is circular or semicircular diameter or a shape close to it and the opening width is constant is shown. Not exclusively. The cutout portion 38 may have a different opening width from the storage portion 4 toward the exhaust area 36, or may have an opening in a shape other than a circular shape or a semi-circular shape.

(4) 上記実施の形態では、リブ３４、４６の頂面部分にのみ凹部５０と凸部５２が形成される場合を示したがこれに限らない。セルホルダー４−１、４−２、４−３、・・・、４−Ｎには、たとえばリブ３４、４６の頂面部分とともに、収納部４を形成する載置部３３および接合部４３にも凹部５０や凸部５２を備えてもよい。 (4) In the above embodiment, the case where the concave portion 50 and the convex portion 52 are formed only on the top surface portions of the ribs 34 and 46 is shown, but the present invention is not limited to this. The cell holders 4-1 and 4-2, 4-3, ..., 4-N have, for example, the top surface portions of the ribs 34 and 46, as well as the mounting portion 33 and the joint portion 43 forming the storage portion 4. May also be provided with a recess 50 or a protrusion 52.

(5) 上記実施の形態では、１つのセルホルダー４−１、４−２、４−３、・・・、４−Ｎの収納面部１６側にリブ３４を備えるとともに載置面部３２側にリブ４６を備える場合を示したがこれに限らない。セルホルダー４−１、４−２、４−３、・・・、４−Ｎには、たとえば収納面部１６または載置面部３２のいずれか一方の面からリブを立設させてもよい。この場合、電源ユニット２では、リブが立設されたセルホルダー４−１、４−２、４−３、・・・、４−Ｎの面に対し、リブを備えないセルホルダー４−１、４−２、４−３、・・・、４−Ｎが積層される。収納部４には、一方のセルホルダー４−１、４−２、４−３、・・・、４−Ｎに形成されたリブが隣接するセルホルダー４−１、４−２、４−３、・・・、４−Ｎの面の一部に接合する。そして、収納部４には、リブとセルホルダー４−１、４−２、４−３、・・・、４−Ｎの一部の間に電池セルの外装部材２６の一部を挟み込まれることで、リブによって形成される排出エリア３６内に排出部８が形成される。 (5) In the above embodiment, the ribs 34 are provided on the storage surface 16 side of one cell holder 4-1, 4-2, 4-3, ..., 4-N, and the ribs are provided on the mounting surface 32 side. The case where the 46 is provided is shown, but the present invention is not limited to this. The cell holders 4-1 and 4-2, 4-3, ..., 4-N may have ribs erected from either one of the storage surface portion 16 and the mounting surface portion 32, for example. In this case, in the power supply unit 2, the cell holders 4-1 and 4-2, 4-3, ... 4-2, 4-3, ..., 4-N are laminated. Cell holders 4-1, 4-2, 4-3, ..., 4-N adjacent to the storage portion 4 are adjacent to the cell holders 4-1, 4-2, 4-3, ..., 4-N. , ..., Join to a part of the 4-N surface. Then, a part of the exterior member 26 of the battery cell is sandwiched between the rib and a part of the cell holders 4-1, 4-2, 4-3, ..., 4-N in the storage part 4. Therefore, the discharge portion 8 is formed in the discharge area 36 formed by the ribs.

以上説明したように、本発明の最も好ましい実施の形態等について説明した。本発明は、上記記載に限定されるものではない。特許請求の範囲に記載され、または発明を実施するための形態に開示された発明の要旨に基づき、当業者において様々な変形や変更が可能である。斯かる変形や変更が、本発明の範囲に含まれることは言うまでもない。
As described above, the most preferable embodiment of the present invention has been described. The present invention is not limited to the above description. Various modifications and modifications can be made by those skilled in the art based on the gist of the invention described in the claims or disclosed in the form for carrying out the invention. Needless to say, such modifications and modifications are included in the scope of the present invention.

本発明は、電池セルを収納する収納部の内部に排出部を形成し、この排出部に電池セルの排出口を含む外装部材の一部を収容して、電池セルで発生したガスを収納部の外部に排出することで、電源ユニットの小型化や軽量が実現でき、有用である。
In the present invention, a discharge portion is formed inside a storage portion for accommodating a battery cell, and a part of an exterior member including a discharge port of the battery cell is accommodated in this discharge portion to store gas generated in the battery cell. It is useful because the power supply unit can be made smaller and lighter by discharging it to the outside of the battery.

２ 電源ユニット
４ 収納部
４−１、４−２、４−３、・・・、４−Ｎ、４−（Ｘ−１）、４−Ｘ、４−（Ｘ＋１） セルホルダー
６ 電池セル
８ 排出部
１０ カバーケース
１２、２２ ガス通気孔
１４−１Ａ、１４−１Ｂ、１４−２Ａ、１４−２Ｂ、・・・ 端子部
１６ 収納面部
１８ ガス排出部
２０ ガス排出口
２４ 蓄電体
２６ 外装部材
２８ 弁機能部
３０ 蓋面部
３２ 載置面部
３３ 載置部
３４、４６ リブ
３６ 排気エリア
３８ 切り欠き部
４０ 遮断面部
４２ 収納壁
４３ 接合部
４４ 導出部
４８ 導出部
５０ 凹部
５２ 凸部

2 Power supply unit 4 Storage unit 4-1, 4-2, 4-3, ..., 4-N, 4- (X-1), 4-X, 4- (X + 1) Cell holder 6 Battery cell 8 Discharge Part 10 Cover case 12, 22 Gas vents 14-1A, 14-1B, 14-2A, 14-2B, ... Terminal part 16 Storage surface part 18 Gas discharge part 20 Gas discharge port 24 Power storage body 26 Exterior member 28 valve Functional part 30 Lid surface part 32 Mounting surface part 33 Mounting part 34, 46 Rib 36 Exhaust area 38 Notch part 40 Blocking surface part 42 Storage wall 43 Joint part 44 Derivation part 48 Derivation part 50 Concave part 52 Convex part

Claims (9)

複数のケースユニットが積層されて、電極体を含む蓄電要素を覆う外装部材の一部にガス排出口を有する蓄電セルを収納する収納部と、
前記収納部内にこの収納部の一部を区分するように形成されており、前記ガス排出口を含む前記外装部材の一部が収容されて前記ガス排出口から流出したガスを前記収納部から排出する排出部と、
を備えることを特徴とする電源ユニット。 A storage unit in which a plurality of case units are stacked to store a storage cell having a gas discharge port in a part of an exterior member that covers a power storage element including an electrode body.
A part of the storage part is formed in the storage part so as to divide a part of the storage part, and a part of the exterior member including the gas discharge port is housed and the gas flowing out from the gas discharge port is discharged from the storage part. And the discharge part
A power supply unit characterized by being equipped with. 前記ケースユニットに形成された立壁部が前記蓄電セルの外装部材の一部に備えたガス排出口を囲うように当接し、当該立壁部が蓄電セルのガス排出口を含む外装部材の一部を収容することで前記排出部を構成する請求項１に記載の電源ユニット。 The standing wall portion formed on the case unit abuts so as to surround the gas discharge port provided in a part of the exterior member of the power storage cell, and the standing wall portion touches a part of the exterior member including the gas discharge port of the power storage cell. The power supply unit according to claim 1, wherein the discharge unit is configured by accommodating the power supply unit. 前記複数のケースユニットの積層によりケースユニットの間に前記収納部が形成されるとともに、前記積層されたケースユニットによって前記立壁部を介して前記ガス排出口の周囲の前記外装部材が挟持されることを特徴とする請求項２に記載の電源ユニット。 The storage portion is formed between the case units by laminating the plurality of case units, and the exterior member around the gas discharge port is sandwiched by the laminated case unit via the standing wall portion. The power supply unit according to claim 2. 前記ケースユニットは、前記蓄電セルの前記電極体を保持する保持部および前記外装部材の一部に接触させる第１の立壁部を備える収納面部と、該収納面部の他面側であり、隣接する他のケースユニットの第１の立壁部に対向して立設された第２の立壁部を備えており、他のケースユニットの収納面部と接合する蓋面部とを備え、
前記収納面部と前記蓋面部との接合により、前記第１の立壁部と前記第２の立壁部との間に前記ガス排出口の周囲の前記外装部材が挟持されることを特徴とする請求項１に記載の電源ユニット。 The case unit is adjacent to a storage surface portion having a holding portion for holding the electrode body of the power storage cell and a first standing wall portion in contact with a part of the exterior member, and the other surface side of the storage surface portion. It is provided with a second standing wall portion that is erected facing the first standing wall portion of another case unit, and is provided with a lid surface portion that is joined to the storage surface portion of the other case unit.
The claim is characterized in that, by joining the storage surface portion and the lid surface portion, the exterior member around the gas discharge port is sandwiched between the first standing wall portion and the second standing wall portion. The power supply unit according to 1. 前記ケースユニットは、前記立壁部に、前記外装部材のガス排出手段の一部を収容する切り欠き部を備えることを特徴とする請求項２ないし請求項４のいずれかの請求項に記載の電源ユニット。 The power supply according to any one of claims 2 to 4, wherein the case unit is provided with a notch portion for accommodating a part of the gas discharging means of the exterior member in the standing wall portion. unit. 前記立壁部に押圧凸部を備えることを特徴とする請求項２ないし請求項５のいずれかの請求項に記載の電源ユニット。 The power supply unit according to any one of claims 2 to 5, wherein the standing wall portion is provided with a pressing convex portion. 前記排出部は、前記蓄電セルの前記ガス排出口に対向する部分に、前記ガス排出口から放出されたガスに接触させる壁部と、前記壁部に接触したガスを外部に流す排出孔とを備えることを特徴とする請求項１ないし請求項６のいずれかの請求項に記載の電源ユニット。 The discharge portion has a wall portion in contact with the gas discharged from the gas discharge port and a discharge hole for flowing the gas in contact with the wall portion to the outside in a portion of the storage cell facing the gas discharge port. The power supply unit according to any one of claims 1 to 6, wherein the power supply unit is provided. 前記蓄電セルは、前記収納部に収納された前記外装部材であり、前記排出孔に対向する部分に前記ガスを通過させる通気孔を備えることを特徴とする請求項７に記載の電源ユニット。 The power supply unit according to claim 7, wherein the power storage cell is the exterior member housed in the storage portion, and is provided with a vent hole for passing the gas in a portion facing the discharge hole. 複数のケースユニットを積層し、電極体を含む蓄電要素を覆う外装部材の一部にガス排出口を有する蓄電セルをケースユニットの収納部に収納する工程と、
前記収納部内にこの収納部の一部を区分するように形成された排出部に前記ガス排出口を含む前記外装部材の一部が収容させる工程と、
を含むことを特徴とする電源ユニットの製造方法。

A process of stacking a plurality of case units and storing a storage cell having a gas discharge port in a part of an exterior member covering a power storage element including an electrode body in a storage portion of the case unit.
A step of accommodating a part of the exterior member including the gas discharge port in a discharge part formed so as to divide a part of the storage part in the storage part.
A method of manufacturing a power supply unit, which comprises.
JP2019178228A 2019-09-30 2019-09-30 Power supply unit and method for producing the same Pending JP2021057166A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120045672A1 (en) * 2010-08-23 2012-02-23 Delphi Technologies, Inc. Vented battery pack
WO2018160012A2 (en) * 2017-03-03 2018-09-07 주식회사 엘지화학 Cartridge and battery module comprising same
JP2018195745A (en) * 2017-05-19 2018-12-06 株式会社フジクラ Power storage module
JP2019032992A (en) * 2017-08-08 2019-02-28 トヨタ自動車株式会社 Battery pack

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120045672A1 (en) * 2010-08-23 2012-02-23 Delphi Technologies, Inc. Vented battery pack
WO2018160012A2 (en) * 2017-03-03 2018-09-07 주식회사 엘지화학 Cartridge and battery module comprising same
JP2018195745A (en) * 2017-05-19 2018-12-06 株式会社フジクラ Power storage module
JP2019032992A (en) * 2017-08-08 2019-02-28 トヨタ自動車株式会社 Battery pack

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