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JP6287776B2 - Power storage module - Google Patents
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JP6287776B2 - Power storage module - Google Patents

Power storage module Download PDF

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Publication number
JP6287776B2
JP6287776B2 JP2014236741A JP2014236741A JP6287776B2 JP 6287776 B2 JP6287776 B2 JP 6287776B2 JP 2014236741 A JP2014236741 A JP 2014236741A JP 2014236741 A JP2014236741 A JP 2014236741A JP 6287776 B2 JP6287776 B2 JP 6287776B2
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Prior art keywords
power storage
terminal
detection terminal
electric wire
connection member
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Expired - Fee Related
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JP2014236741A
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JP2016100211A (en
Inventor
清水　宏
宏 清水
平光　宏臣
宏臣 平光
克司 宮▲崎▼
克司 宮▲崎▼
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Sumitomo Wiring Systems Ltd
AutoNetworks Technologies Ltd
Sumitomo Electric Industries Ltd
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Sumitomo Wiring Systems Ltd
AutoNetworks Technologies Ltd
Sumitomo Electric Industries Ltd
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Priority to JP2014236741A priority Critical patent/JP6287776B2/en
Priority to PCT/JP2015/081290 priority patent/WO2016080212A1/en
Publication of JP2016100211A publication Critical patent/JP2016100211A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G2/00—Details of capacitors not covered by a single one of groups H01G4/00-H01G11/00
    • H01G2/02—Mountings
    • H01G2/04—Mountings specially adapted for mounting on a chassis
    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/10—Multiple hybrid or EDL capacitors, e.g. arrays or modules
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/74—Terminals, e.g. extensions of current collectors
    • 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
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • 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
    • H01M50/298—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the wiring of battery packs
    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/569—Constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals
    • 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
    • H01M50/271—Lids or covers for the racks or secondary casings
    • 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)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Battery Mounting, Suspending (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Electric Double-Layer Capacitors Or The Like (AREA)

Description

本発明は、蓄電モジュールに関する。   The present invention relates to a power storage module.

例えば電気自動車やハイブリッド車両に搭載される動力用の蓄電モジュールは、一般に、バスバーを介して多数の蓄電素子を直列接続して構成されている。この種の蓄電モジュールでは、蓄電素子の電圧を検知するための電圧検知線を、蓄電素子の電極端子に接続する場合がある。   For example, a power storage module for power mounted in an electric vehicle or a hybrid vehicle is generally configured by connecting a large number of power storage elements in series via a bus bar. In this type of power storage module, a voltage detection line for detecting the voltage of the power storage element may be connected to the electrode terminal of the power storage element.

電圧検知線を電極端子に接続する構成としては、例えば電圧検知線の端末に検知端子を圧着し、その検知端子を、バスバーとともに電極端子に共締めする構成が知られている（例えば、特許文献１を参照）。   As a configuration for connecting the voltage detection line to the electrode terminal, for example, a configuration is known in which the detection terminal is crimped to the terminal of the voltage detection line, and the detection terminal is fastened to the electrode terminal together with the bus bar (for example, Patent Documents). 1).

特開２０１１−７７０３１号公報JP 2011-77031 A

上記特許文献１に記載の蓄電モジュールにおいて、電極端子を挿通する挿通孔が設けられた検知端子は、当該検知端子の挿通孔が、電極端子を挿通する挿通孔が設けられたバスバーの挿通孔と整合するように重ねられた状態で、樹脂製のバスバーモジュールに収容されている。このバスバーモジュールは、検知端子の挿通孔およびバスバーの挿通孔に電極端子を挿通させながら、複数の蓄電素子を並べてなる蓄電素子群に取り付けられ、電極端子にナットを螺合させることで蓄電モジュールが組み立てられる。   In the power storage module described in Patent Document 1, the detection terminal provided with the insertion hole through which the electrode terminal is inserted includes the insertion hole of the bus bar provided with the insertion hole through which the electrode terminal is inserted. In a state where they are stacked so as to be aligned, they are accommodated in a resin bus bar module. The bus bar module is attached to a power storage element group in which a plurality of power storage elements are arranged while the electrode terminals are inserted through the detection terminal insertion holes and the bus bar insertion holes. Assembled.

このような構成によると、電極端子にナットを螺合させるためのスペースが必要であるため検知端子の接続構造が大型化し、これにより、蓄電モジュール自体が大型化するという問題があった。   According to such a configuration, since a space for screwing the nut into the electrode terminal is required, the connection structure of the detection terminal is increased, and there is a problem that the power storage module itself is increased in size.

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、小型化可能な蓄電モジュールを提供することを目的とする。   The present invention has been completed based on the above situation, and an object thereof is to provide a power storage module that can be miniaturized.

上記課題を解決するものとして、本発明は、側縁から突出する正極および負極のリード端子を有する蓄電素子を複数並べてなる蓄電素子群と、前記リード端子に溶接されて接合され複数の前記蓄電素子を電気的に接続する接続部材と、前記蓄電素子の状態を検知する検知端子と、を備え、前記検知端子および前記接続部材のうち、いずれか一方の部材は、他方の部材に取り付けられる取付突部を有する一方、前記他方の部材は前記取付突部を受け入れる取付受け部を有し、前記検知端子は、電線が接続される電線接続部と、前記電線接続部と前記取付突部または前記取付受け部との間に設けられ、前記電線接続部を前記接続部材から離れた位置に配する屈曲部と、を有する蓄電モジュールである。
In order to solve the above problems, the present invention provides a storage element group in which a plurality of storage elements having positive and negative lead terminals protruding from a side edge are arranged, and a plurality of the storage elements welded and joined to the lead terminals. A connection member that electrically connects the detection element and a detection terminal that detects a state of the power storage element, and one of the detection terminal and the connection member is attached to the other member. The other member has a mounting receiving portion for receiving the mounting protrusion, and the detection terminal includes a wire connecting portion to which an electric wire is connected, the wire connecting portion and the mounting protrusion, or the mounting. And a bent portion that is provided between the receiving portion and that disposes the wire connecting portion at a position away from the connecting member.

本発明において、検知端子および接続部材のうち、いずれか一方の部材は、他方の部材に取り付けられる取付突部を有する一方、他方の部材は取付突部を受け入れる取付受け部を有する。従って本発明によれば、一方の部材の取付突部を他方の部材の取付受け部に取り付けるだけで、接続部材と検知端子とを電気的に接続可能であり、電極端子にナットを螺合させるためのスペースが不要である。その結果、本発明によれば、小型化可能な蓄電モジュールを提供することができる。   In the present invention, either one of the detection terminal and the connection member has an attachment protrusion that is attached to the other member, while the other member has an attachment receiving portion that receives the attachment protrusion. Therefore, according to the present invention, the connection member and the detection terminal can be electrically connected simply by attaching the attachment protrusion of one member to the attachment receiving portion of the other member, and the nut is screwed into the electrode terminal. No space is needed. As a result, according to the present invention, it is possible to provide a power storage module that can be miniaturized.

ところで、接続部材の端部にバリが存在する場合には、接続部材と検知端子とを密着させにくくなり、接合に支障が生じることがある。しかしながら、本発明において、検知端子は、電線が接続される電線接続部と、電線接続部と取付突部または取付受け部との間に設けられ、電線接続部を接続部材から離れた位置に配する屈曲部と、を有する。したがって本発明によれば、検知端子と接続部材とが接合される部分を密着させつつ、電線接続部を接続部材から離れた位置に配することができるので、接合に支障を生じない。また、本発明によれば、電線を接続部材の端部のバリからさけて取り付けることができるので、電線の損傷を防ぐこともできる。   By the way, when a burr | flash exists in the edge part of a connection member, it becomes difficult to contact | connect a connection member and a detection terminal, and a trouble may arise in joining. However, in the present invention, the detection terminal is provided between the wire connecting portion to which the electric wire is connected and the wire connecting portion and the mounting protrusion or the mounting receiving portion, and the wire connecting portion is arranged at a position away from the connecting member. And a bent portion. Therefore, according to the present invention, it is possible to arrange the electric wire connection portion at a position away from the connection member while closely contacting the portion where the detection terminal and the connection member are bonded, so that the bonding is not hindered. Moreover, according to this invention, since an electric wire can be attached avoiding the burr | flash of the edge part of a connection member, damage to an electric wire can also be prevented.

本発明は以下の構成であってもよい。
絶縁材料からなるとともに、前記接続部材を保持する保持部材を備え、前記保持部材は、前記検知端子の前記電線接続部を固定する端子固定部を有していてもよい。
このような構成によれば、絶縁材料からなり、接続部材を保持しつつ検知端子を固定する端子固定部を有する保持部材を備えるので、検知端子および接続部材の接続状態を良好なものとしつつ、絶縁保持できる。 The present invention may have the following configuration.
The holding member may be provided with an insulating material and hold the connection member, and the holding member may include a terminal fixing portion that fixes the electric wire connection portion of the detection terminal.
According to such a configuration, since the holding member having a terminal fixing portion that fixes the detection terminal while holding the connection member is formed of an insulating material, the connection state of the detection terminal and the connection member is improved, Can be insulated.

本発明によれば、小型化可能な蓄電モジュールを提供することができる。   ADVANTAGE OF THE INVENTION According to this invention, the electrical storage module which can be reduced in size can be provided.

実施形態１の蓄電モジュールを正面側から表した斜視図The perspective view showing the electrical storage module of Embodiment 1 from the front side 蓄電モジュールの背面図Rear view of power storage module 蓄電素子群に保持部材を取り付けた様子を示す側面図Side view showing a state in which a holding member is attached to the storage element group 蓄電素子群に保持部材を取り付けた様子を示す正面図The front view which shows a mode that the holding member was attached to the electrical storage element group 蓄電素子群に保持部材を取り付けた様子を示す背面図Rear view showing a state where the holding member is attached to the storage element group 接続部材および検知端子が取り付けられた保持部材の正面図Front view of holding member to which connecting member and detection terminal are attached 図６のＡ−Ａ線における断面図Sectional drawing in the AA line of FIG. 検知端子の斜視図Perspective view of detection terminal 検知端子のの平面図Plan view of detection terminal 検知端子の側面図Side view of detection terminal 接続部材の斜視図Perspective view of connecting member

＜実施形態１＞
本発明の実施形態１を図１ないし図１１によって説明する。図面においては、複数の同一部材のうち一の部材にのみ符号を付し、他の同一部材については符号を省略する場合がある。以下の説明において、図２における上側を上とし、下側を下とし、図１における右側を前方（正面側）とし左側を後方（背面側）とする。 <Embodiment 1>
A first embodiment of the present invention will be described with reference to FIGS. In the drawings, only one member of the plurality of identical members may be given a reference numeral, and the reference numerals may be omitted for other identical members. In the following description, the upper side in FIG. 2 is the upper side, the lower side is the lower side, the right side in FIG. 1 is the front (front side), and the left side is the rear (back side).

本実施形態の蓄電モジュール１０は、側縁から突出するリード端子１３を有する蓄電素子１２を複数（本実施形態では、２４個）並べてなる蓄電素子群１１と、リード端子１３に接合され複数の蓄電素子１２を電気的に接続する接続部材３０と、蓄電素子１２の状態を検知する検知端子３７と、接続部材３０を保持する保持部材２１と、を備える。   The power storage module 10 of the present embodiment includes a power storage element group 11 in which a plurality (24 in the present embodiment) of power storage elements 12 having lead terminals 13 protruding from a side edge are arranged, and a plurality of power storage elements joined to the lead terminals 13. A connection member 30 that electrically connects the element 12, a detection terminal 37 that detects the state of the power storage element 12, and a holding member 21 that holds the connection member 30 are provided.

（蓄電素子１２）
蓄電素子群１１を構成する蓄電素子１２としては、二次電池、キャパシタ、コンデンサ等、必要に応じて任意の蓄電素子１２を用いることができる。本実施形態に係る蓄電素子１２としては、二次電池が用いられている。 (Storage element 12)
As the storage element 12 constituting the storage element group 11, any storage element 12 such as a secondary battery, a capacitor, or a capacitor can be used as necessary. A secondary battery is used as the electricity storage element 12 according to the present embodiment.

蓄電素子１２は、上方から見て略長方形状をなしている。蓄電素子１２は、略長方形状をなす一対のラミネートフィルムの側縁を溶着してなる容器１４と、容器１４の内部に収容された図示しない蓄電要素と、容器１４の内部において蓄電要素に接続されるとともに、容器１４の側縁から外部に導出される正極および負極のリード端子１３と、を備える。   The electricity storage element 12 has a substantially rectangular shape when viewed from above. The electricity storage element 12 is connected to the electricity storage element inside the container 14, the electricity storage element (not shown) housed in the container 14, which is formed by welding the side edges of a pair of laminated films having a substantially rectangular shape. And positive and negative lead terminals 13 led out from the side edge of the container 14.

蓄電素子１２は、２個ずつ極性の同じリード端子１３が上下に配されるように積層され、接続部材３０を介して並列に接続されている。詳細は図示しないが、蓄電素子群１１において、前方のリード端子１３は上から順に負極、負極、正極、正極、負極、負極…の順に並んでおり、後方のリード端子１３は上から順に、正極、正極、負極、負極、正極、正極…の順に並んでいる。   The power storage elements 12 are stacked so that two lead terminals 13 having the same polarity are arranged one above the other, and are connected in parallel via a connection member 30. Although not shown in detail, in the power storage element group 11, the front lead terminals 13 are arranged in the order of negative electrode, negative electrode, positive electrode, positive electrode, negative electrode, negative electrode,..., And the rear lead terminal 13 is positive electrode in order from the top. , Positive electrode, negative electrode, negative electrode, positive electrode, positive electrode,...

上端部に配される蓄電素子１２の負極リード端子１３Ｂおよび、下端部に配される蓄電素子１２の正極リード端子１３Ａには、それぞれ、外部機器（図示せず）と電気的に接続される外部接続バスバー３６が電気的に接続される。外部機器としては、たとえば、別の蓄電モジュール１０やインバータ等があげられる。   The negative electrode lead terminal 13B of the electricity storage device 12 arranged at the upper end and the positive electrode lead terminal 13A of the electricity storage device 12 arranged at the lower end are respectively externally connected to an external device (not shown). The connection bus bar 36 is electrically connected. Examples of the external device include another power storage module 10 and an inverter.

蓄電素子群１１のリード端子１３が導出される側の面（図１の前方の面と後方の面）には、それぞれ、配線モジュール２０が取り付けられている。   The wiring modules 20 are attached to the surfaces (the front surface and the rear surface in FIG. 1) on the side where the lead terminals 13 of the power storage element group 11 are led out.

（配線モジュール２０）
配線モジュール２０は蓄電素子群１１に取り付けられて、複数の蓄電素子１２を電気的に接続するためのものである。配線モジュール２０は、蓄電素子１２のリード端子１３に接続されて複数の蓄電素子１２を電気的に接続する接続部材３０と、接続部材３０を保持する保持部材２１と、を備える。 (Wiring module 20)
The wiring module 20 is attached to the power storage element group 11 to electrically connect the plurality of power storage elements 12. The wiring module 20 includes a connection member 30 that is connected to the lead terminal 13 of the power storage element 12 and electrically connects the plurality of power storage elements 12, and a holding member 21 that holds the connection member 30.

（保持部材２１）
接続部材３０を保持する保持部材２１は絶縁材料からなる。本実施形態では、蓄電素子群１１には、複数の保持部材２１を連結してなるものが取り付けられる。 (Holding member 21)
The holding member 21 that holds the connection member 30 is made of an insulating material. In the present embodiment, the power storage element group 11 is attached by connecting a plurality of holding members 21.

図３における上端に配される保持部材２１には、上から２番目の保持部材２１に設けた連結孔２２に嵌りこんで連結される連結突部２３が設けられている。また図３における下端に配される保持部材２１には、下から２段目の保持部材２１の連結突部２３を受け入れる連結孔２２が設けられている。   The holding member 21 disposed at the upper end in FIG. 3 is provided with a connecting projection 23 that is fitted and connected to a connecting hole 22 provided in the second holding member 21 from the top. Further, the holding member 21 arranged at the lower end in FIG. 3 is provided with a connecting hole 22 for receiving the connecting protrusion 23 of the holding member 21 in the second stage from the bottom.

上下の端部に配される保持部材２１以外の保持部材２１には、上方の保持部材２１の連結突部２３を受け入れる連結孔２２と、下方の保持部材２１の連結孔２２に嵌りこむ連結突部２３がそれぞれ設けられている。   The holding member 21 other than the holding member 21 arranged at the upper and lower ends has a connecting hole 22 that receives the connecting protrusion 23 of the upper holding member 21 and a connecting protrusion that fits into the connecting hole 22 of the lower holding member 21. Each part 23 is provided.

また、上端に配される保持部材２１および下端に配される保持部材２１には、カバー４０のカバー取付孔４３に嵌りこむカバー取付突部２４が外側方向に突出して形成されている。   Further, the holding member 21 arranged at the upper end and the holding member 21 arranged at the lower end are formed with a cover mounting projection 24 that fits into the cover mounting hole 43 of the cover 40 so as to protrude outward.

各保持部材２１には、図６に示すように、検知端子３７の電線接続部３９を固定する端子固定部２７と、検知端子３７に接続される検知電線Ｗ１を導出する電線導出部２８と、当該検知電線Ｗ１が配索される電線配索部２９とが設けられている。   As shown in FIG. 6, each holding member 21 has a terminal fixing portion 27 for fixing the electric wire connecting portion 39 of the detection terminal 37, an electric wire outlet portion 28 for deriving the detection electric wire W <b> 1 connected to the detection terminal 37, A wire routing portion 29 in which the detection wire W1 is routed is provided.

（検知端子３７）
検知端子３７は蓄電素子１２の電圧等を検知するためのものであって、接続部材３０を介して蓄電素子１２のリード端子１３と電気的に接続されている。 (Detection terminal 37)
The detection terminal 37 is for detecting the voltage or the like of the power storage element 12 and is electrically connected to the lead terminal 13 of the power storage element 12 via the connection member 30.

検知端子３７（一方の部材の一例）は、接続部材３０（他方の部材の一例）に取り付けられる取付突部３８と、検知電線Ｗ１の一端部が接続される電線接続部３９とを有する（図８〜図１０を参照）。また、検知端子３７は、電線接続部３９と取付突部３８との間に設けられ、電線接続部３９を接続部材３０から離れた位置に配する屈曲部３７Ｂ，３７Ｃを有する。   The detection terminal 37 (an example of one member) includes an attachment protrusion 38 that is attached to the connection member 30 (an example of the other member), and a wire connection portion 39 to which one end of the detection wire W1 is connected (see FIG. 8 to 10). The detection terminal 37 includes bent portions 37 </ b> B and 37 </ b> C that are provided between the electric wire connection portion 39 and the attachment protrusion 38 and that place the electric wire connection portion 39 at a position away from the connection member 30.

取付突部３８は検知端子３７の一端部（図１０における左端部）に設けられている。取付突部３８は、検知端子３７の一端部側を図１０における下方に折り曲げて形成される折曲部３８Ａよりも端末側の部分であり、図７に示すように、接続部材３０の端子取付孔３２Ｂ（取付受け部の一例）に挿通されて接続部材３０の蓄電素子１２側（図７の下側）の面に掛止される。これにより、検知端子３７の取付突部３８を接続部材３０の端子取付孔３２Ｂに取り付けた後に、レーザー溶接等により検知端子３７及び接続部材３０を接合する場合には、接続部材３０と検知端子３７とを強固に固定しつつ電気的に接続可能にすることができる。更に、取付突部３８は、接続部材３０の端子取付孔３２Ｂに取付けるために、図９に示すように、他の部分よりも幅寸法が小さく設定されている。   The attachment protrusion 38 is provided at one end (the left end in FIG. 10) of the detection terminal 37. The attachment protrusion 38 is a portion closer to the terminal than the bent portion 38A formed by bending one end portion of the detection terminal 37 downward in FIG. 10, and as shown in FIG. It is inserted into the hole 32B (an example of an attachment receiving portion) and hooked on the surface of the connection member 30 on the side of the storage element 12 (the lower side in FIG. 7). Accordingly, when the detection terminal 37 and the connection member 30 are joined by laser welding or the like after the attachment protrusion 38 of the detection terminal 37 is attached to the terminal attachment hole 32B of the connection member 30, the connection member 30 and the detection terminal 37 are joined. Can be electrically connected while firmly fixing. Furthermore, as shown in FIG. 9, the mounting protrusion 38 is set to have a width dimension smaller than that of other portions in order to be mounted in the terminal mounting hole 32 </ b> B of the connection member 30.

電線接続部３９は検知端子３７の他端部（図１０における右端部）に設けられており、２組のバレル部３９Ａ，３９Ｂを有する。２組のバレル部３９Ａ，３９Ｂのうち、図１０の左側のバレル部３９Ａは検知電線Ｗ１の端末において被覆材の剥離除去により露出する導体に圧着されるワイヤバレルであり、図１０の右側（検知端子３７の端末側）のバレル部３９Ｂは検知電線Ｗ１の被覆材により覆われている部分に圧着されるインシュレーションバレルである。   The wire connecting portion 39 is provided at the other end portion (the right end portion in FIG. 10) of the detection terminal 37, and has two sets of barrel portions 39A and 39B. Of the two sets of barrel portions 39A and 39B, the left barrel portion 39A in FIG. 10 is a wire barrel that is crimped to the conductor exposed by peeling and removing the covering material at the end of the detection wire W1, and the right side in FIG. The barrel portion 39B on the terminal side of the terminal 37 is an insulation barrel that is crimped to a portion covered with the covering material of the detection wire W1.

取付突部３８と電線接続部３９との間の領域３７Ａには、図７に示すように、屈曲部（第１屈曲部３７Ｂ、第２屈曲部３７Ｃ）が形成されている。検知端子３７の領域３７Ａのうち、第１屈曲部３７Ｂよりも取付突部３８側（図７における左側）の領域は接続部材３０の一方の面（図７における上面）と接触している。検知端子３７の領域３７Ａのうち、第１屈曲部３７Ｂと第２屈曲部３７Ｃとの間の部分は接続部材３０に対して略垂直に配される起立壁３７Ｅであり、第２屈曲部３７Ｃよりも図７における右側に設けられた電線接続部３９は、起立壁３７Ｅの高さＹの分、接続部材３０から離れた位置に配されている。   As shown in FIG. 7, bent portions (first bent portion 37 </ b> B, second bent portion 37 </ b> C) are formed in a region 37 </ b> A between the mounting protrusion 38 and the wire connecting portion 39. Of the region 37A of the detection terminal 37, the region closer to the mounting protrusion 38 (left side in FIG. 7) than the first bent portion 37B is in contact with one surface (upper surface in FIG. 7) of the connection member 30. Of the region 37A of the detection terminal 37, a portion between the first bent portion 37B and the second bent portion 37C is an upright wall 37E arranged substantially perpendicular to the connection member 30, and from the second bent portion 37C. Further, the electric wire connecting portion 39 provided on the right side in FIG. 7 is arranged at a position away from the connecting member 30 by the height Y of the standing wall 37E.

検知電線Ｗ１は導体を絶縁樹脂製の被覆材により被覆してなる。詳細は図示しないが、検知電線Ｗ１の導体は、たとえば、アルミニウム、アルミニウム合金、銅、銅合金等の金属材料からなる。検知電線Ｗ１の両端部（一端部および他端部）においては、被覆材を剥離除去することにより導体が露出している。   The detection electric wire W1 is formed by covering a conductor with a covering material made of insulating resin. Although details are not shown, the conductor of the detection electric wire W1 is made of a metal material such as aluminum, aluminum alloy, copper, copper alloy or the like. At both end portions (one end portion and the other end portion) of the detection electric wire W1, the conductor is exposed by peeling and removing the covering material.

検知電線Ｗ１の一端部は、検知端子３７および接続部材３０を介して蓄電素子１２と電気的に接続され、検知電線Ｗ１の他端部は、コネクタ５０を介して電池コントロールユニット（ＥＣＵ）等の他の機器（図示せず）に接続されている。検知電線Ｗ１は保持部材２１の電線導出部２８から導出され、電線配索部２９に配索されている。   One end of the detection electric wire W1 is electrically connected to the power storage element 12 via the detection terminal 37 and the connection member 30, and the other end of the detection electric wire W1 is connected to the battery control unit (ECU) or the like via the connector 50. It is connected to other equipment (not shown). The detection wire W <b> 1 is led out from the wire lead-out portion 28 of the holding member 21 and is routed in the wire routing portion 29.

（接続部材３０）
蓄電素子１２のリード端子１３が接続される接続部材３０は、図１１に示すように、正極リード端子１３Ａと同じ金属材料からなる第１金属部３１と、負極リード端子１３Ｂと同じ金属材料からなる第２金属部３５と、を接合してなる。第１金属部３１には正極リード端子１３Ａが接合され、第２金属部３５には負極リード端子１３Ｂが接合される。第１金属部３１と第２金属部３５とは、たとえば冷間圧接や溶接等公知の方法により接合される。本実施形態において第１金属部３１はアルミニウムまたはアルミニウム合金製の金属板材からなり、第２金属部３５は銅または銅合金製の金属板材からなる。 (Connecting member 30)
As shown in FIG. 11, the connection member 30 to which the lead terminal 13 of the electricity storage element 12 is connected is made of the same metal material as the negative electrode lead terminal 13B and the first metal part 31 made of the same metal material as the positive electrode lead terminal 13A. The second metal part 35 is joined. A positive electrode lead terminal 13 </ b> A is bonded to the first metal portion 31, and a negative electrode lead terminal 13 </ b> B is bonded to the second metal portion 35. The first metal part 31 and the second metal part 35 are joined by a known method such as cold welding or welding. In the present embodiment, the first metal portion 31 is made of a metal plate made of aluminum or an aluminum alloy, and the second metal portion 35 is made of a metal plate made of copper or a copper alloy.

接続部材３０において、第１金属部３１および第２金属部３５は、それぞれ、リード端子１３と接合される端子接合部３２と、第１金属部３１と第２金属部３５とが接合される部材接合部３４とを有する。   In the connection member 30, the first metal part 31 and the second metal part 35 are respectively a terminal joint part 32 joined to the lead terminal 13 and a member to which the first metal part 31 and the second metal part 35 are joined. And a joint portion 34.

接続部材３０の端子接合部３２には、検知端子３７を取り付ける長方形状の端子取付孔３２Ｂが形成されている。また、接続部材３０の４つの角部には保持部材２１に固定される固定部３３が設けられている。   A rectangular terminal attachment hole 32 </ b> B for attaching the detection terminal 37 is formed in the terminal joint portion 32 of the connection member 30. In addition, fixing portions 33 that are fixed to the holding member 21 are provided at four corners of the connection member 30.

蓄電素子群１１の前方において、上から２つの負極リード端子１３は第２金属部３５のみからなる端部接続部材３０Ａの端子接合部３２に接合されており、下から２つの正極リード端子１３Ａが第２金属部３５のみからなる端部接続部材３０Ａの端子接合部３２に接合されている。これら以外のリード端子１３は第１金属部３１と第２金属部３５とを接合してなる接続部材３０の端子接合部３２に２つずつ接合されている。   In front of the power storage element group 11, the two negative electrode lead terminals 13 from the top are joined to the terminal joint part 32 of the end connection member 30A made of only the second metal part 35, and the two positive electrode lead terminals 13A are joined from the bottom. It is joined to the terminal joint portion 32 of the end connection member 30 </ b> A made of only the second metal portion 35. The lead terminals 13 other than these are joined two by two to the terminal joining portion 32 of the connecting member 30 formed by joining the first metal portion 31 and the second metal portion 35.

リード端子１３と接続部材３０の端子接合部３２との溶接方法およびリード端子１３と外部接続バスバー３６との溶接方法としては、レーザー溶接、超音波溶接等の方法があげられる。   Examples of the welding method between the lead terminal 13 and the terminal joint portion 32 of the connection member 30 and the welding method between the lead terminal 13 and the external connection bus bar 36 include laser welding and ultrasonic welding.

（カバー４０）
蓄電モジュール１０は、図１に示すように、蓄電素子群１１の正面側と背面側（リード端子１３が導出される端部側）に配される絶縁樹脂製のカバー４０を備える。蓄電素子群１１の正面側のカバー４０Ａおよび背面側のカバー４０Ｂには、それぞれ、蓄電素子１２の状態を検知する検知端子３７と図示しない電池コントロールユニット（ＥＣＵ）等の機器とを電気的に接続するコネクタ５０を固定するコネクタ固定部４１が、設けられている（図１および図２を参照）。 (Cover 40)
As shown in FIG. 1, the power storage module 10 includes a cover 40 made of an insulating resin disposed on the front side and the back side (the end side from which the lead terminal 13 is led out) of the power storage element group 11. A detection terminal 37 for detecting the state of the storage element 12 and a device such as a battery control unit (ECU) (not shown) are electrically connected to the front cover 40A and the back cover 40B of the storage element group 11, respectively. The connector fixing | fixed part 41 which fixes the connector 50 to perform is provided (refer FIG. 1 and FIG. 2).

また、正面側のカバー４０Ａおよび背面側のカバー４０Ｂには、コネクタハウジング５１の上端から導出される電線Ｗ２を固定する一対の電線固定片４２が設けられている。さらに正面側のカバー４０Ａおよび背面側のカバー４０Ｂには、保持部材２１のカバー取付突部２４を受け入れるカバー取付孔４３が設けられている（図１を参照）。   The front cover 40 </ b> A and the back cover 40 </ b> B are provided with a pair of electric wire fixing pieces 42 for fixing the electric wires W <b> 2 led out from the upper end of the connector housing 51. Further, the cover 40A on the front side and the cover 40B on the back side are provided with cover mounting holes 43 for receiving the cover mounting protrusions 24 of the holding member 21 (see FIG. 1).

正面側カバー４０Ａの上端と下端には蓄電素子群１１と外部機器（図示せず）とを接続する外部接続バスバー３６が導出されるバスバー導出孔４４が設けられている。外部機器としては、たとえば、別の蓄電モジュールやインバータ等があげられる。外部接続バスバー３６は、銅又は銅合金、アルミニウムまたはアルミニウム合金等の導電性の金属材料からなり、外部機器と電気的に接続される接続孔３６Ａが貫通して設けられている。   Bus bar lead-out holes 44 through which external connection bus bars 36 for connecting the power storage element group 11 and external devices (not shown) are led out are provided at the upper and lower ends of the front cover 40A. Examples of the external device include another power storage module and an inverter. The external connection bus bar 36 is made of a conductive metal material such as copper, copper alloy, aluminum, or aluminum alloy, and is provided with a connection hole 36A that is electrically connected to an external device.

（蓄電モジュール１０の組み立て方法）
２４個の蓄電素子１２のリード端子１３の端部を略垂直下方に屈曲させておき、上下に隣り合う２つのリード端子１３が同極性となるように、積層しておく。図１１に示す接続部材３０を１１個と端部接続部材３０Ａを２個用意する。 (Assembly method of power storage module 10)
The ends of the lead terminals 13 of the 24 power storage elements 12 are bent substantially vertically downward, and are stacked so that the two lead terminals 13 adjacent to each other in the vertical direction have the same polarity. 11 connecting members 30 and two end connecting members 30A shown in FIG. 11 are prepared.

接続部材３０は、第１金属部３１を構成する金属板材と、第２金属部３５を構成する金属板材を、所定形状にプレス加工したのち、第１金属部３１の部材接合部３４と第２金属部３５とを接合することにより作製することができる。   The connection member 30 presses the metal plate material constituting the first metal part 31 and the metal plate material constituting the second metal part 35 into a predetermined shape, and then presses the member joining part 34 of the first metal part 31 and the second metal member 31. It can be manufactured by joining the metal part 35.

接続部材３０を所定の保持部材２１に取り付け固定する。複数の保持部材２１を連結して１枚のプレート状とし、保持部材２１に固定された接続部材３０の端子取付孔３２Ｂに検知端子３７の取付突部３８を差し込むとともに保持部材２１の端子固定部２７に検知端子３７の電線接続部３９を固定し、電線導出部２８から検知電線Ｗ１を導出させると検知端子３７が固定される。   The connection member 30 is attached and fixed to a predetermined holding member 21. A plurality of holding members 21 are connected to form a single plate, and the mounting protrusions 38 of the detection terminals 37 are inserted into the terminal mounting holes 32B of the connection members 30 fixed to the holding members 21 and the terminal fixing portions of the holding members 21 are fixed. When the electric wire connecting portion 39 of the detection terminal 37 is fixed to 27 and the detection electric wire W1 is led out from the electric wire outlet portion 28, the detection terminal 37 is fixed.

このとき検知端子３７の電線接続部３９（バレル部３９Ａ，３９Ｂ）は、図７に示すように、接続部材３０から起立壁３７Ｅの高さＹの分、離れた位置に配される。   At this time, the electric wire connecting portion 39 (barrel portions 39A, 39B) of the detection terminal 37 is arranged at a position away from the connecting member 30 by the height Y of the upright wall 37E, as shown in FIG.

次に、各検知端子３７に接続されている検知電線Ｗ１を保持部材２１の電線配索部２９に配索し、蓄電素子群１１の前方と後方に取り付ける配線モジュール２０を作製する。   Next, the detection wire W1 connected to each detection terminal 37 is routed in the wire routing portion 29 of the holding member 21, and the wiring module 20 attached to the front and rear of the power storage element group 11 is manufactured.

続いて配線モジュール２０を蓄電素子群１１の前方と後方に配し、リード端子１３と接続部材３０の端子接合部３２とをレーザー溶接等の溶接方法により接合する。このとき前方に取り付ける配線モジュール２０には、外部接続バスバー３６も接続する。   Subsequently, the wiring module 20 is disposed in front of and behind the power storage element group 11, and the lead terminal 13 and the terminal joint portion 32 of the connection member 30 are joined by a welding method such as laser welding. At this time, the external connection bus bar 36 is also connected to the wiring module 20 attached to the front.

次に、正面側カバー４０Ａと背面側カバー４０Ｂとを取り付けて、検知端子３７に接続された電線Ｗ１をコネクタ５０を介して外部機器と電気的に接続すると図１に示す蓄電モジュール１０が得られる。   Next, when the front cover 40A and the back cover 40B are attached and the electric wire W1 connected to the detection terminal 37 is electrically connected to an external device via the connector 50, the power storage module 10 shown in FIG. 1 is obtained. .

（本実施形態の作用、効果）
次に、本実施形態の作用、効果について説明する。
本実施形態において、検知端子３７は接続部材３０に取り付けられる取付突部３８を有する一方、接続部材３０は取付突部３８を受け入れる端子取付孔３２Ｂを有するので、検知端子３７の取付突部３８を接続部材３０の端子取付孔３２Ｂに取り付けるだけで、接続部材３０と検知端子３７とを電気的に接続可能であり、電極端子にナットを螺合させるためのスペースが不要である。その結果、本実施形態によれば、小型化可能な蓄電モジュール１０を提供することができる。 (Operation and effect of this embodiment)
Next, the operation and effect of this embodiment will be described.
In the present embodiment, the detection terminal 37 has an attachment protrusion 38 attached to the connection member 30, while the connection member 30 has a terminal attachment hole 32 </ b> B that receives the attachment protrusion 38. The connection member 30 and the detection terminal 37 can be electrically connected only by being attached to the terminal attachment hole 32B of the connection member 30, and a space for screwing the nut into the electrode terminal is not necessary. As a result, according to the present embodiment, the power storage module 10 that can be reduced in size can be provided.

ところで、接続部材３０の端部にバリが存在する場合には、接続部材３０と検知端子３７とを密着させにくくなり、接合に支障が生じることがあるが、本実施形態において、検知端子３７は電線接続部３９と取付突部３８の間に設けられ、電線接続部３９を接続部材３０から離れた位置に配する屈曲部３７Ｂ，３７Ｃを有する。したがって、本実施形態によれば、検知端子３７と接続部材３０とが接合される部分を密着させつつ、電線接続部３９を接続部材３０から離れた位置に配することができるので、溶接による接合に支障を生じない。また、検知電線Ｗ１を接続部材３０の端部のバリからさけて取り付けることができ、電線Ｗ１の損傷を防ぐこともできる。   By the way, when the burr | flash exists in the edge part of the connection member 30, it becomes difficult to contact | connect the connection member 30 and the detection terminal 37, and it may interfere with joining, but in this embodiment, the detection terminal 37 is Bending portions 37 </ b> B and 37 </ b> C are provided between the electric wire connection portion 39 and the attachment projection 38 and distribute the electric wire connection portion 39 at a position away from the connection member 30. Therefore, according to the present embodiment, the electric wire connection portion 39 can be disposed at a position away from the connection member 30 while closely attaching the portion where the detection terminal 37 and the connection member 30 are bonded, so that the connection by welding is performed. Will not be disturbed. Moreover, the detection electric wire W1 can be attached away from the burr | flash of the edge part of the connection member 30, and damage to the electric wire W1 can also be prevented.

また、本実施形態によれば、絶縁材料からなるとともに、接続部材３０を保持する保持部材２１が、検知端子３７の電線接続部３９を固定する端子固定部２７を有しているから、検知端子３７および接続部材３０の接続状態を良好なものとしつつ、絶縁保持できる。   In addition, according to the present embodiment, since the holding member 21 that is made of an insulating material and holds the connection member 30 has the terminal fixing portion 27 that fixes the electric wire connection portion 39 of the detection terminal 37, the detection terminal 37 and the connection member 30 can be insulated and kept in good condition.

＜他の実施形態＞
本明細書で開示の技術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であってもよい。
（１）上記実施形態では、取付突部３８を有する検知端子３７と、端子取付孔３２Ｂ（取付受け部）を有する接続部材３０とを示したが、検知端子が取付受け部を有し、接続部材が取付突部を有していてもよい。
（２）上記実施形態では、検知端子３７に２つの屈曲部３７Ｂ，３７Ｃを設けることにより電線接続部３９を接続部材３０に対し概ね平行に配される構成としたが、電線接続部が接続部材に対し垂直に配される構成であってもよい。
（３）上記実施形態では、検知端子３７の、電線接続部３９を固定する端子固定部２７を有する保持部材２１を示したが、端子固定部が形成されていない保持部材であってもよいし、電線接続部以外の部分を固定する固定部を有する保持部材であってもよい。
（４）上記実施形態では、２４個の蓄電素子１２からなる蓄電素子群１１を示したが、蓄電素子群を構成する蓄電素子の数は２４個未満でも２４個より多くてもよい。
（５）上記実施形態では、蓄電素子１２を２個ずつ並列に接続したものを示したが、全ての蓄電素子を直列に接続してもよいし、蓄電素子を３個以上並列に接続してもよい。
（６）上記実施形態では蓄電素子１２として二次電池を用いる例を示したが、蓄電素子としてキャパシタ、コンデンサ等を用いてもよい。 <Other embodiments>
The technology disclosed in this specification is not limited to the embodiment described with reference to the above description and drawings, and may be, for example, the following embodiment.
(1) In the above embodiment, the detection terminal 37 having the attachment protrusion 38 and the connection member 30 having the terminal attachment hole 32B (attachment receiving portion) are shown. However, the detection terminal has the attachment receiving portion and is connected. The member may have an attachment protrusion.
(2) In the above-described embodiment, the electric wire connecting portion 39 is arranged substantially parallel to the connecting member 30 by providing the detection terminal 37 with the two bent portions 37B and 37C. It may be configured to be arranged perpendicular to the above.
(3) In the above embodiment, the holding member 21 having the terminal fixing portion 27 for fixing the electric wire connecting portion 39 of the detection terminal 37 is shown. However, the holding member 21 may not be formed with the terminal fixing portion. And the holding member which has a fixing | fixed part which fixes parts other than an electric wire connection part may be sufficient.
(4) In the above embodiment, the power storage element group 11 including the 24 power storage elements 12 is shown. However, the number of power storage elements constituting the power storage element group may be less than 24 or more than 24.
(5) In the above embodiment, two power storage elements 12 are connected in parallel. However, all power storage elements may be connected in series, or three or more power storage elements may be connected in parallel. Also good.
(6) In the above embodiment, an example in which a secondary battery is used as the power storage element 12 has been described. However, a capacitor, a capacitor, or the like may be used as the power storage element.

１０…蓄電モジュール
１１…蓄電素子群
１２…蓄電素子
１３…リード端子
１３Ａ…正極リード端子
１３Ｂ…負極リード端子
２１…保持部材
２７…端子固定部
２８…電線導出部
３０…接続部材
３２Ｂ…端子取付孔（取付受け部）
３７…検知端子
３７Ａ…領域
３７Ｂ，３７Ｃ…屈曲部
３７Ｂ…第１屈曲部
３７Ｃ…第２屈曲部
３７Ｅ…起立壁
３８…取付突部
３９…電線接続部
３９Ａ，３９Ｂ…バレル部
４０…カバー
４０Ａ…正面側カバー
４０Ｂ…背面側カバー
Ｗ１…検知電線
Ｗ２…電線
Ｙ…高さ DESCRIPTION OF SYMBOLS 10 ... Power storage module 11 ... Power storage element group 12 ... Power storage element 13 ... Lead terminal 13A ... Positive electrode lead terminal 13B ... Negative electrode lead terminal 21 ... Holding member 27 ... Terminal fixing part 28 ... Electric wire lead-out part 30 ... Connection member 32B ... Terminal attachment hole (Mounting receiver)
37 ... Detection terminal 37A ... Area 37B, 37C ... Bent part 37B ... First bent part 37C ... Second bent part 37E ... Standing wall 38 ... Mounting protrusion 39 ... Electric wire connecting part 39A, 39B ... Barrel part 40 ... Cover 40A ... Front side cover 40B ... Back side cover W1 ... Detection wire W2 ... Wire Y ... Height

Claims (2)

側縁から突出する正極および負極のリード端子を有する蓄電素子を複数並べてなる蓄電素子群と、前記リード端子に溶接されて接合され複数の前記蓄電素子を電気的に接続する接続部材と、前記蓄電素子の状態を検知する検知端子と、を備え、
前記検知端子および前記接続部材のうち、いずれか一方の部材は、他方の部材に取り付けられる取付突部を有する一方、前記他方の部材は前記取付突部を受け入れる取付受け部を有し、
前記検知端子は、電線が接続される電線接続部と、
前記電線接続部と前記取付突部または前記取付受け部との間に設けられ、前記電線接続部を前記接続部材から離れた位置に配する屈曲部と、を有する蓄電モジュール。 A power storage element group in which a plurality of power storage elements each having a positive electrode and a negative electrode lead terminal projecting from a side edge are arranged; a connection member that is welded and joined to the lead terminals to electrically connect the plurality of power storage elements; A detection terminal for detecting the state of the element,
One of the detection terminal and the connecting member has an attachment protrusion that is attached to the other member, while the other member has an attachment receiving portion that receives the attachment protrusion,
The detection terminal is an electric wire connection part to which an electric wire is connected;
A power storage module, comprising: a bent portion that is provided between the electric wire connection portion and the attachment protrusion or the attachment receiving portion, and is arranged at a position away from the connection member. 絶縁材料からなるとともに、前記接続部材を保持する保持部材を備え、
前記保持部材は、前記検知端子の前記電線接続部を固定する端子固定部を有する請求項１に記載の蓄電モジュール。 It is made of an insulating material and includes a holding member that holds the connection member,
The power storage module according to claim 1, wherein the holding member includes a terminal fixing portion that fixes the electric wire connection portion of the detection terminal.
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