WO2010052788A1 - 二次電池用ブスバー及び二次電池モジュール - Google Patents
二次電池用ブスバー及び二次電池モジュール Download PDFInfo
- Publication number
- WO2010052788A1 WO2010052788A1 PCT/JP2008/070309 JP2008070309W WO2010052788A1 WO 2010052788 A1 WO2010052788 A1 WO 2010052788A1 JP 2008070309 W JP2008070309 W JP 2008070309W WO 2010052788 A1 WO2010052788 A1 WO 2010052788A1
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- WIPO (PCT)
- Prior art keywords
- secondary battery
- bus bar
- opening
- plate
- plate portion
- Prior art date
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Classifications
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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
- H01M50/50—Current conducting connections for cells or batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R11/00—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts
- H01R11/11—End pieces or tapping pieces for wires, supported by the wire and for facilitating electrical connection to some other wire, terminal or conductive member
- H01R11/28—End pieces consisting of a ferrule or sleeve
- H01R11/281—End pieces consisting of a ferrule or sleeve for connections to batteries
- H01R11/288—Interconnections between batteries
-
- 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
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/503—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the shape of the interconnectors
-
- 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
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/505—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising a single busbar
-
- 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
- H01M50/543—Terminals
- H01M50/547—Terminals characterised by the disposition of the terminals on the cells
- H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
-
- 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
- H01M50/543—Terminals
- H01M50/552—Terminals characterised by their shape
- H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
-
- 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
Definitions
- the present invention relates to a bus bar for a secondary battery for connecting secondary batteries to each other, and a secondary battery module.
- Secondary batteries such as lithium secondary batteries have a battery container.
- a positive electrode and a negative electrode are accommodated as battery elements for charging and discharging.
- An electrolytic solution is sealed in the battery container, and the battery element is impregnated in the electrolytic solution.
- the battery container is provided with positive and negative electrode terminals for electrically connecting the battery element to an external device.
- the electrode terminal is usually formed in a convex shape so as to protrude from the battery container.
- a plurality of secondary batteries are electrically connected and used as a secondary battery module.
- the plurality of secondary batteries are electrically connected by a secondary battery bus bar.
- the secondary battery bus bar connects the electrode terminal of one secondary battery to the electrode terminal of the other secondary battery.
- the secondary battery bus bar is required to connect a plurality of secondary batteries electrically and reliably.
- JP-A-2007-324004 Japanese Patent Application Laid-Open No. 2007-324004 describes that an inter-terminal connecting member (bus bar) is plastically deformed to be adapted to an electrode terminal.
- An object of the present invention is to provide a bus bar for a secondary battery and a secondary battery module that can electrically connect a plurality of secondary batteries with high reliability.
- the bus bar for a secondary battery has a plate-like and conductive plate part, an opening provided in the plate part and having an electrode terminal of a secondary battery having a convex electrode terminal, A first slit that extends from the opening and elastically changes the shape of the opening when the electrode terminal is inserted into the opening.
- the opening is formed narrower than the electrode terminal so that the inserted electrode terminal is tightened by an elastic force.
- the opening is elastically expanded when the electrode terminal is inserted. Thereby, an electrode terminal is clamped elastically. If the bus bar is firmly fixed to the electrode terminal, the fixed portion may be damaged when an impact or the like is applied.
- the electrode terminal is elastically tightened in the opening, the resistance to mechanical impact and the like is high. Therefore, it becomes possible to improve the reliability of the electrical connection between the secondary batteries.
- the above-described bus bar for a secondary battery may further include a second slit portion provided in the plate portion.
- a 2nd slit part is provided in the position where stress concentrates when the shape of an opening part changes.
- the second slit portion by providing the second slit portion, it is possible to prevent stress from being concentrated at a specific position in the plate portion. By preventing the concentration of stress, the plate portion can be more reliably prevented from being damaged.
- the bus bar for the secondary battery further includes an auxiliary bar that is detachably attached to the plate portion, and a pair of auxiliary bar notch portions that are provided on the plate portion and engage with both ends of the auxiliary bar. You may have.
- the pair of auxiliary bar notch portions are provided at positions that sandwich the first slit portion in a direction orthogonal to the first slit portion.
- the auxiliary bar can be used to supplementarily add a force that tightens the electrode terminal.
- the above-mentioned bus bar for a secondary battery may further include an elastic cover attached so as to cover the plate portion with the electrode terminal inserted.
- the bus bar for the secondary battery is covered with the elastic cover. Therefore, it can prevent that the bus bar for secondary batteries touches air, and can prevent that the bus bar for secondary batteries corrodes.
- the plate portion has a shape extending with the first direction as the longitudinal direction, the openings are provided at two locations of the plate portion so as to be arranged in the first direction, and the first slit portion has two openings. Are provided at two locations, and each of the two first slit portions may have a shape extending along the first direction.
- the secondary battery module according to the present invention includes a plurality of secondary batteries having convex electrode terminals, and the above-described secondary battery bus bar for connecting the electrode terminals of the plurality of secondary batteries.
- the bus bar for a secondary battery includes a plate-like and conductive plate part, and an opening provided in the plate part and into which the electrode terminal of the secondary battery having a convex electrode terminal is inserted. It has.
- the plate portion has a laminated structure including a plurality of plate elements.
- the material may be different among a plurality of plate elements.
- the plate thickness may be different among a plurality of plate elements.
- the size of the opening may be different between the plurality of plate elements.
- the size of the opening may be increased toward the side where the electrode terminal is inserted.
- the electrode terminal can be easily inserted into the opening.
- the opening may have a tapered shape such that the opening diameter increases toward the side where the electrode terminal is inserted.
- an electrode terminal can be made easy to insert in an opening part.
- the inserted electrode terminal can easily come into contact with the plate portion at a plurality of locations, and the contact resistance between the electrode terminal and the plate portion can be reduced.
- the width of the plate portion may be different among a plurality of plate elements. Thereby, the surface area of a board part can be increased. The surface area of the plate portion is increased, and the heat dissipation of the plate portion can be enhanced.
- the above-described bus bar for a secondary battery may further include a rivet group that is provided on the plate portion and connects a plurality of plate elements.
- the rivet group includes a plurality of rivets.
- the plate portion may extend in the first direction as a longitudinal direction, and the openings may be provided in two locations of the plate portion so as to be arranged in the first direction.
- the secondary battery module according to the present invention includes a plurality of secondary batteries having convex electrode terminals, and the above-described secondary battery bus bar connecting the electrode terminals of the plurality of secondary batteries.
- a bus bar for a secondary battery and a secondary battery module capable of electrically connecting a plurality of secondary batteries with high reliability are provided.
- FIG. 1A is a top view of the secondary battery module according to the first embodiment.
- FIG. 1B is a side view of the secondary battery module according to the first embodiment.
- FIG. 2 is a top view of the bus bar for the secondary battery according to the first embodiment.
- FIG. 3 is a perspective view showing the bus bar insertion tool.
- FIG. 4A is an explanatory diagram for explaining a method of inserting electrode terminals.
- FIG. 4B is an explanatory diagram for explaining an electrode terminal insertion method.
- FIG. 5 is a perspective view of the bus bar for a secondary battery according to the first embodiment.
- FIG. 6A is a cross-sectional view showing an opening.
- FIG. 6B is a perspective view illustrating another example of the opening.
- FIG. 7 is a cross-sectional view showing the opening.
- FIG. 6A is a cross-sectional view showing an opening.
- FIG. 8 is a cross-sectional view showing the opening.
- FIG. 9A is a cross-sectional view showing an opening.
- FIG. 9B is a cross-sectional view showing the opening.
- FIG. 9C is an explanatory diagram illustrating a manufacturing process of the bus bar for the secondary battery according to the first embodiment.
- FIG. 9D is an explanatory diagram illustrating a manufacturing process of the bus bar for the secondary battery according to the first embodiment.
- FIG. 10A is a cross-sectional view of the plate portion.
- FIG. 10B is a perspective view showing another example of the plate portion.
- FIG. 11 is a plan view showing a modification of the first slit portion.
- FIG. 12 is a plan view showing a modification of the first slit portion.
- FIG. 11 is a plan view showing a modification of the first slit portion.
- FIG. 13 is a plan view showing a modification of the first slit portion.
- FIG. 14 is a top view of the bus bar for the secondary battery according to the second embodiment.
- FIG. 15 is a side view of the bus bar for a secondary battery according to the second embodiment.
- FIG. 16 is a perspective view of a bus bar for a secondary battery according to the third embodiment.
- FIG. 1A is a top view of the secondary battery module according to the present embodiment.
- FIG. 1B is a side view showing the secondary battery module.
- the secondary battery module includes a plurality of secondary batteries 1.
- the plurality of secondary batteries 1 are electrically connected by a secondary battery bus bar (hereinafter referred to as bus bar).
- Each of the plurality of secondary batteries 1 includes a battery container.
- a chargeable / dischargeable power generation element (not shown) is accommodated.
- the power generation element includes a positive electrode and a negative electrode.
- the battery container is filled with a non-aqueous electrolyte, and the power generation element is impregnated with the non-aqueous electrolyte.
- each secondary battery 1 two electrode terminals (a positive terminal 2 and a negative terminal 3) are attached to the battery container.
- the positive electrode terminal 2 is connected to the positive electrode of the power generation element in the battery container, and the negative electrode terminal 3 is connected to the negative electrode of the power generation element.
- the two electrode terminals (2, 3) are formed in a convex shape so as to protrude from the battery container.
- the two electrode terminals (2, 3) are cylindrical.
- the positive terminal 2 of one secondary battery 1 is connected to the negative terminal 3 of the other secondary battery by a bus bar. Thereby, the some secondary battery 1 is electrically connected in series.
- FIG. 2 is a top view showing the bus bar.
- the bus bar is formed by a plate-like plate portion 4.
- the plate portion 4 extends with the first direction as the longitudinal direction.
- the plate portion 4 is provided with an opening portion 5, a first slit portion 6, and a second slit portion 7 (7-1, 7-2).
- the plate portion 4 is made of a conductive material.
- plate part 4 will not be specifically limited if it has electroconductivity, For example, a brass, copper alloy, SUS, tin, nickel, steel, aluminum, a beryllium copper alloy etc. are mentioned.
- the plate portion 4 may be subjected to a surface treatment as necessary.
- the surface may be subjected to conductive plating such as gold or silver for the purpose of increasing the conductivity.
- the surface of the plate portion 4 may be coated with an insulating material (for example, insulating resin).
- the opening 5 is provided at two locations of the plate portion 4.
- the opening 5 is a portion into which the electrode terminals (2, 3) are inserted.
- the two openings 5 are arranged along the first direction.
- the shape of each opening 5 corresponds to the shape of the electrode terminals (2, 3) and is generally circular.
- the opening diameter of each opening 5 is slightly narrower than the diameter of the electrode terminals (2, 3).
- the first slit portion 6 is provided corresponding to each opening 5. That is, the first slit portion 6 is also provided at two locations on the plate portion 4. Each of the first slit portions 6 provided at two locations extends from the end portion of the plate portion 4 toward each opening portion 5. Each first slit portion 6 extends outward from each opening 5 along the first direction.
- each opening 5 becomes elastically wide when the electrode terminals (2, 3) are inserted.
- the inserted electrode terminals (2, 3) are elastically tightened by the plate portion 4.
- the second slit portion 7 (7-1, 7-2) is provided in order to prevent stress from being concentrated on one place in the plate portion 4.
- each opening 5 becomes wider on the first slit 6 side.
- the second slit portion 7 (7-1, 7-2) is provided at a position on the opposite side of the first slit portion 6 with respect to the opening 5.
- a slit 7-1 is provided at a position closer to the center than the opening 5 on each of two sides (first side in the figure) along the first direction of the plate portion 4.
- a slit 7-2 is provided so as to extend from the opening 5 to the center side of the plate portion 4. Due to the presence of the second slits 7 (7-1, 7-2) at these positions, the stress does not concentrate at one place in the plate portion 4 even if the opening 5 widens. Therefore, permanent deformation of the plate portion 4 is prevented.
- the diameter of the opening 5 is narrower than that of the electrode terminals (2, 3). Therefore, the opening 5 is inserted when the electrode terminals (2, 3) are inserted. Will spread.
- the shape of the opening part 5 can change elastically. Accordingly, the electrode terminals (2, 3) can be easily inserted without applying excessive force.
- the inserted electrode terminals (2, 3) are elastically tightened. Since it is elastically tightened, even if an impact or the like is applied, the connecting portion between the plate portion 4 and the electrode terminals (2, 3) is hardly damaged.
- the presence of the second slit portion 7 (7-1, 7-2) prevents stress from concentrating on one portion of the plate portion 4. Thereby, the tolerance with respect to an impact etc. is raised more. Further, it is possible to prevent the plate portion 4 from being permanently deformed although the shape of the opening 5 is changed. Accordingly, a plurality of secondary batteries can be electrically connected with high reliability.
- FIG. 3 is a perspective view showing an example of such a bus bar insertion tool 8.
- the bus bar insertion tool 8 includes a gripping part 81 gripped by a user and an extending part 82 extending from the gripping part 81.
- the extending portion 82 is bent at a substantially right angle on the way.
- the extending part 82 is formed so that the cross section of the tip part is elliptical.
- 4A and 4B are explanatory views showing a state when the electrode terminals (2, 3) are inserted using the bus bar insertion tool 8.
- FIG. 1 is explanatory views showing a state when the electrode terminals (2, 3) are inserted using the bus bar insertion tool 8.
- the distal end portion of the bus bar insertion tool 8 is inserted into the first slit portion 6 so that the major axis direction coincides with the extending direction of the first slit portion 6. Subsequently, the gripping portion 81 is turned. Thereby, as FIG. 4B shows, the 1st slit part 6 is expanded by the bus bar insertion tool 8. If the electrode terminals (2, 3) are inserted in this state, the electrode terminals (2, 3) can be easily inserted.
- FIG. 5 is a perspective view of the bus bar.
- the plate portion 4 has a laminated structure including a plurality of plate elements 41.
- the plurality of plate elements 41 are coupled by rivets (not shown). It is assumed that the electrode terminals (2, 3) are inserted into the plate portion 4 from below.
- the plate portion 4 since the plate portion 4 has a laminated structure, the characteristics of the plate portion 4 can be changed in the plate thickness direction.
- FIG. 6A is a cross-sectional view showing a modification of the present embodiment, and is a cross-sectional view taken along the line AA ′ of FIG. 5.
- the size of the opening 5 is different in the thickness direction.
- the size (opening diameter) of the opening 5 is wider as the lower plate element 41 is. Since the opening diameter is wider toward the lower side, the electrode terminals (2, 3) can be easily inserted. Further, the inserted electrode terminals (2, 3) are strongly tightened by the upper plate element 41 having a small opening diameter. Therefore, the electrode terminals (2, 3) and the plate portion 4 can be reliably connected.
- the plurality of plate elements 41 may be stepped only in the first slit portion 6 portion. Even with the configuration shown in FIG. 6B, the electrode terminals (2, 3) can be easily inserted.
- FIG. 7 is a cross-sectional view showing another modification of the present embodiment.
- the plate portion 4 includes a thin plate element 41-2 and a thick plate element 41-1.
- the thin plate element 41-2 is provided on the lower side, and the thick plate element 41-1 is provided on the upper side. Since the thin plate element 41-2 is easy to bend, it is easy to insert the electrode terminals (2, 3).
- the thick plate element 41-1 is hard to bend, and the inserted electrode terminals (2, 3) are strongly tightened. Thereby, like the example shown in FIG. 6A, the electrode terminals (2, 3) can be easily inserted, and the electrode terminals (2, 3) and the plate portion 4 can be reliably connected.
- FIG. 8 is a view showing a state in which the electrode terminals (2, 3) are inserted into the plate portion 4 shown in FIG. Since the thin plate element 41-2 provided on the lower side is easy to bend, a gap is not easily generated between the secondary battery 1 and the battery container. That is, the plate portion 4 is easily adhered to the battery container of the secondary battery 1. When there is a gap between the battery container of the secondary battery 1 and the plate portion 4, the battery container of the secondary battery comes into contact with air, and the battery container is easily corroded. On the other hand, corrosion of the battery container can be prevented by bringing the plate portion 4 into close contact with the battery container.
- different materials can be used between the plurality of plate elements 41.
- a material having high corrosion resistance for example, beryllium copper alloy
- a material having high elasticity for example, copper or brass
- the electrode terminals (2, 3) can be easily inserted.
- the shape of the opening 5 of each plate element 41 can be a taper shape such that the opening diameter increases toward the side where the electrode terminals (2, 3) are inserted.
- FIG. 9A is a cross-sectional view showing still another modification of the present embodiment.
- the opening 5 of each plate element 41 has a tapered shape in which the opening diameter increases toward the lower side.
- the electrode terminals (2, 3) can be easily inserted.
- the electrode terminals (2, 3) once inserted are difficult to be removed.
- the electrode terminals (2, 3) are in contact with each of the plurality of plate elements 41.
- each plate portion 4 and the electrode terminals (2, 3) can be reliably brought into contact at a plurality of locations (see FIG. 9B). Thereby, the contact resistance between the secondary battery and the bus bar can be reduced, and the reliability of electrical connection can be further increased.
- each plate element 41 may be tapered only in the first slit portion 6.
- Each plate element 41 in which the opening 5 is tapered can be obtained as follows. As shown in FIG. 9C, each plate element 41 is prepared and punched out by a mold. As a result, the opening 5 is formed as shown in FIG. 9D. At this time, in the opening 5, the opening diameter becomes wider as it is out of the mold. Therefore, if the plurality of plate elements 41 are stacked so that the punching side is the lower side, the plate portion 4 having the shape shown in FIG. 9A can be obtained. In manufacturing the plate portion 4, a special manufacturing process for forming a tapered shape is not necessary.
- the cost at the time of manufacturing the board part 4 can be suppressed by making the board part 4 into a laminated structure. This is for the following reason.
- punching is performed using a mold.
- the burden on the mold is greatly reduced by punching a thin plate. Therefore, by making the plate portion 4 have a laminated structure, the life of the mold can be extended and the manufacturing cost can be suppressed.
- FIG. 10A is a cross-sectional view showing a modified example in which the plate width is changed, and shows a cross section corresponding to BB ′ in FIG. 5.
- a difference in plate width causes a step at the end of the plate portion 4, thereby increasing the surface area of the plate portion 4.
- the bus bar generates heat when a current flows. By increasing the surface area of the plate portion 4, the heat dissipation of the bus bar can be enhanced.
- the board width does not necessarily need to be changed about the whole board part 4, and the board width may be changed in a part of the board part 4.
- FIG. 10B a step may be provided only in the first slit portion 6 portion.
- the first slit portion 6 extends from the opening portion 5 to the end portion of the plate portion 4 .
- the first slit portion 6 only needs to be provided so that the inserted electrode terminals (2, 3) are elastically clamped, and need not necessarily extend from the opening 5 to the end of the plate portion 4.
- the plate portions may be connected on the extension of the first slit portion 6.
- the first slit portion 6 extends linearly along the first direction.
- the first slit portion 6 does not necessarily extend linearly.
- the first slit portion 6 may extend while bending.
- the 1st slit part 6 is drawn along the 1st direction in the center part in the transversal direction (direction orthogonal to a 1st direction) of a board part.
- the 1st slit part 6 does not necessarily need to extend along the 1st direction in the center part.
- the first slit portion 6 may extend obliquely with respect to the first direction.
- both the plate thickness and the opening diameter of the opening 5 may be different.
- FIG. 14 is a top view showing the bus bar according to the present embodiment.
- This embodiment is different from the first embodiment in that the auxiliary bar cutout portion 9 is provided in the plate portion 4 and the auxiliary bar 10 is attached. Since other points can be the same as those in the first embodiment, a detailed description thereof will be omitted.
- the auxiliary bar cutout portions 9 are provided at two locations at both ends in the first direction of the plate portion 4.
- the two auxiliary bar cutout portions 9 are provided at positions that sandwich the first slit portion 6 in a direction (second direction in the drawing) orthogonal to the first slit portion 6.
- the auxiliary bar notch 9 is provided to attach the auxiliary bar 10 to the plate portion 4.
- FIG. 15 is a side view of the bus bar viewed from the direction C in FIG. As shown in FIG. 15, the auxiliary bar 10 extends along the plate width direction (second direction). Both end portions of the auxiliary bar 10 in the second direction are bent so as to engage with the notch portion 9 for the auxiliary bar, and the cross section has a U shape.
- the auxiliary bar 10 is attached to the plate portion 4 after the electrode terminals (2, 3) are inserted into the opening 5.
- the auxiliary bar 10 is attached so as to intersect the first slit portion 6.
- the plate portion 4 is restrained by the portion where the first slit portion 6 is provided by the auxiliary bar 10.
- the auxiliary bar 10 supplementarily adds a force for tightening the electrode terminals (2, 3) in the opening. Thereby, the inserted electrode terminals (2, 3) are less likely to come out, and the connection reliability between the electrode terminals (2, 3) and the bus bars can be further increased.
- FIG. 16 is a perspective view showing a bus bar according to the present embodiment.
- the bus bar is provided with a cover 11.
- the cover 11 includes a flat plate portion 11-1, an opening portion 11-2, and a side portion 11-3.
- the flat plate portion 11-1 is a portion that covers the upper surface of the plate portion 4.
- the side portion 11-3 is a portion that covers the side portion of the plate portion 4.
- the opening 11-2 is a portion through which the electrode terminals (2, 3) are inserted.
- the cover 11 is formed of a material having a higher elastic modulus than the plate portion 4 such as rubber.
- the plate portion 4 is covered with the cover 11. Thereby, it is prevented that the board part 4 contacts air, and corrosion of the board part 4 is prevented.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
Description
この発明によれば、弾性カバーにより、二次電池用ブスバーが被覆される。これにより、二次電池用ブスバーが空気と触れることを防止でき、二次電池用ブスバーが腐食することを防止できる。
板部分を積層構造とすることにより、板部分の厚み方向において、その特性に変化をつけることができる。これにより、用途などに併せて、板部分の特性を最適化することができる。
以下に、図面を参照しつつ、本発明の実施形態について説明する。
尚、各要素の開口部5をテーパー形状とする場合には、必ずしも開口部5の全周をテーパー形状とする必要はない。例えば、第1スリット部6においてのみ、各板要素41がテーパー形状とされていてもよい。
続いて、本発明の第2の実施形態について説明する。図14は、本実施形態に係るブスバーを示す上面図である。本実施形態では、板部分4に補助バー用切欠き部9が設けられている点、及び補助バー10が取り付けられる点において、第1の実施形態と異なっている。その他の点については、第1の実施形態と同様とすることができるので、詳細な説明は省略する。
続いて、本発明の第3の実施形態について説明する。本実施形態では、更に、弾性率が大きいカバーが追加される。その他の点については、既述の実施形態と同様とすることができるので、詳細な説明は省略する。
Claims (16)
- 板状であり導電性である板部分と、
前記板部分に設けられ、凸形状の電極端子を有する二次電池の前記電極端子が挿入される、開口部と、
前記開口部から延びる第1スリット部と、
を具備し、
前記開口部は、挿入された前記電極端子が締め付けられるように、前記電極端子よりも狭く形成されている
二次電池用ブスバー。 - 請求の範囲1に記載された二次電池用ブスバーであって、
更に、
前記板部分に設けられた第2スリット部
を具備し、
前記第2スリット部は、前記開口部の形状が変化したときに応力が集中する位置に設けられている
二次電池用ブスバー。 - 請求の範囲1又は2に記載された二次電池用ブスバーであって、
更に、
前記板部分に対して着脱自在に取り付けられる補助バーと、
前記板部分に設けられ、前記補助バーの両端部と係合する一対の補助バー用切欠き部と、
を具備し、
前記一対の補助バー用切欠き部は、前記第1スリット部と直交する方向で前記第1スリット部を挟むような位置に設けられており、
前記補助バーが両端部で前記一対の補助バー用切欠き部に係合することにより、前記開口部を締め付けるような力が補助的に加えられる
二次電池用ブスバー。 - 請求の範囲1乃至3のいずれかに記載された二次電池用ブスバーであって、
更に、
前記電極端子が挿入された状態で前記板部分を被覆するように取り付けられる、カバー
を具備する
二次電池用ブスバー。 - 請求の範囲1乃至4のいずれかに記載された二次電池用ブスバーであって、
前記板部分は、第1方向を長手方向として延びる形状であり、
前記開口部は、前記板部分の二箇所に前記第1方向で並ぶように設けられており、
前記第1スリット部は、前記二箇所の開口部に対応して、二箇所に設けられており、
前記二箇所の第1スリット部の各々は、前記第1方向に沿って延びている
二次電池用ブスバー。 - 凸形状の電極端子を有する複数の二次電池と、
前記複数の二次電池の前記電極端子同士を接続する、請求の範囲1乃至5のいずれかに記載された二次電池用ブスバーと、
を具備する
二次電池モジュール。 - 板状であり導電性である板部分と、
前記板部分に設けられ、凸形状の電極端子を有する二次電池の前記電極端子が挿入される開口部と、
を具備し、
前記板部分は、複数の板要素による積層構造である
二次電池用ブスバー。 - 請求の範囲7に記載された二次電池用ブスバーであって、
前記複数の板要素間において、材質が異なっている
二次電池用ブスバー。 - 請求の範囲7又は8に記載された二次電池用ブスバーであって、
前記複数の板要素間において、板厚が異なっている
二次電池用ブスバー。 - 請求の範囲7乃至9のいずれかに記載された二次電池用ブスバーであって、
前記複数の板要素間において、前記開口部の大きさが異なっている
二次電池用ブスバー。 - 請求の範囲10に記載された二次電池用ブスバーであって、
前記電極端子は、前記板部分の下側から挿入され、
前記複数の板要素間において、前記開口部の大きさは、前記下側の板要素ほど大きい
二次電池用ブスバー。 - 請求の範囲7乃至11のいずれかに記載された二次電池用ブスバーであって、
前記電極端子は、前記板部分の下側から挿入され、
前記複数の板要素のそれぞれにおいて、前記開口部は、前記下側ほど開口径が大きくなるようなテーパー形状である
二次電池用ブスバー。 - 請求の範囲7乃至12のいずれかに記載された二次電池用ブスバーであって、
前記板部分の幅は、前記複数の板要素間で異なっている
二次電池用ブスバー。 - 請求の範囲7乃至13のいずれかに記載された二次電池用ブスバーであって、
更に、
前記板部分に設けられ、前記複数の板要素を結合するリベット
を具備する
二次電池用ブスバー。 - 請求の範囲7乃至14のいずれかに記載された二次電池用ブスバーであって、
前記板部分は、第1方向を長手方向として延びており、
前記開口部は、前記板部分の二箇所に前記第1方向で並ぶように設けられている
二次電池用ブスバー。 - 凸形状の電極端子を有する複数の二次電池と、
前記複数の二次電池の前記電極端子同士を接続する、請求の範囲7乃至15のいずれかに記載された二次電池用ブスバーと、
を具備する
二次電池モジュール。
Priority Applications (6)
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KR1020117007442A KR101280796B1 (ko) | 2008-11-07 | 2008-11-07 | 2차 전지용 버스바 및 2차 전지 모듈 |
EP08877983.0A EP2343755A4 (en) | 2008-11-07 | 2008-11-07 | OMNIBUS SECONDARY BATTERY BAR AND SECONDARY BATTERY MODULE |
CN2008801313684A CN102171858A (zh) | 2008-11-07 | 2008-11-07 | 二次电池用汇流条和二次电池模块 |
JP2010536623A JP5272017B2 (ja) | 2008-11-07 | 2008-11-07 | 二次電池用ブスバー及び二次電池モジュール |
PCT/JP2008/070309 WO2010052788A1 (ja) | 2008-11-07 | 2008-11-07 | 二次電池用ブスバー及び二次電池モジュール |
US13/121,453 US20110177381A1 (en) | 2008-11-07 | 2008-11-07 | Bus bar for secondary battery and secondary battery module |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2008/070309 WO2010052788A1 (ja) | 2008-11-07 | 2008-11-07 | 二次電池用ブスバー及び二次電池モジュール |
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US (1) | US20110177381A1 (ja) |
EP (1) | EP2343755A4 (ja) |
JP (1) | JP5272017B2 (ja) |
KR (1) | KR101280796B1 (ja) |
CN (1) | CN102171858A (ja) |
WO (1) | WO2010052788A1 (ja) |
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JPWO2019188214A1 (ja) * | 2018-03-28 | 2021-03-11 | パナソニックIpマネジメント株式会社 | バスバーおよび電池積層体 |
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JP2020047582A (ja) * | 2018-09-14 | 2020-03-26 | 寧徳時代新能源科技股▲分▼有限公司Contemporary Amperex Technology Co., Limited | 電池モジュールおよびそのバスバーアセンブリ |
Also Published As
Publication number | Publication date |
---|---|
EP2343755A4 (en) | 2013-06-26 |
KR20110067027A (ko) | 2011-06-20 |
JPWO2010052788A1 (ja) | 2012-03-29 |
KR101280796B1 (ko) | 2013-07-05 |
JP5272017B2 (ja) | 2013-08-28 |
EP2343755A1 (en) | 2011-07-13 |
CN102171858A (zh) | 2011-08-31 |
US20110177381A1 (en) | 2011-07-21 |
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