WO2014073443A1 - 組電池および組電池の製造方法 - Google Patents
組電池および組電池の製造方法 Download PDFInfo
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- WO2014073443A1 WO2014073443A1 PCT/JP2013/079516 JP2013079516W WO2014073443A1 WO 2014073443 A1 WO2014073443 A1 WO 2014073443A1 JP 2013079516 W JP2013079516 W JP 2013079516W WO 2014073443 A1 WO2014073443 A1 WO 2014073443A1
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- Prior art keywords
- assembled battery
- electrode tab
- conductive member
- series
- pair
- Prior art date
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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
- 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
- H01M50/211—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for pouch cells
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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
- H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
- H01M50/291—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs characterised by their shape
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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
- 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
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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
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/507—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising an arrangement of two or more busbars within a container structure, e.g. busbar modules
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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
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/509—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the type of connection, e.g. mixed connections
- H01M50/51—Connection only in series
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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
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/509—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the type of connection, e.g. mixed connections
- H01M50/512—Connection only in parallel
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Definitions
- the present invention relates to an assembled battery and a method for manufacturing the assembled battery.
- the present invention has been made to solve the above-described problems, and an object of the present invention is to provide an assembled battery and a method of manufacturing the assembled battery that makes it extremely easy to handle the assembled battery.
- the assembled battery of the present invention for achieving the above object has a single cell, a frame member, a conductive member, and a bus bar.
- the unit cell includes a battery main body in which the power generation element is housed in an exterior body, and an electrode tab including a positive electrode tab and a negative electrode tab that are connected to the power generation element and project from the end of the exterior body.
- the frame member mounts a pair of unit cells on the front surface and the back surface, respectively.
- the conductive member is disposed on the frame member and electrically connects the electrode tabs of the pair of unit cells.
- the bus bar electrically connects the conductive members disposed on the frame members adjacent in the stacking direction among the plurality of stacked frame members.
- a battery main body in which the power generation element is housed in the exterior body, and a positive electrode tab that is connected to the power generation element and protrudes from the end of the exterior body.
- an electrode tab including a negative electrode tab in the method for manufacturing an assembled battery includes a unit cell holding step, an electrode tab connecting step, and a conductive member connecting step.
- the unit cell holding step the pair of unit cells are respectively placed on the front surface and the back surface using a frame member.
- the electrode tab connection step the electrode tabs of the pair of unit cells are electrically connected to each other using a conductive member disposed on the frame member.
- the conductive member connecting step among the plurality of stacked frame members, the conductive members disposed on the frame members adjacent in the stacking direction are electrically connected to each other using a bus bar.
- FIG. 1 is a perspective view showing the assembled battery 1.
- FIG. 2 is an exploded perspective view showing the assembled battery 1 in an exploded manner.
- FIG. 3 is an exploded perspective view showing the battery module 110 of the assembled battery 1 in an exploded manner.
- FIG. 4 is an exploded end view showing an essential part of the battery module 110 of the assembled battery 1 in an exploded manner.
- FIG. 4A shows a part along the line A-A ′ in FIG. 3 in an end view.
- FIG. 4B shows a part along the line B-B ′ in FIG. 3 in an end view.
- FIG. 5 is a schematic diagram showing the parallel body 210 of the assembled battery 1.
- FIG. 6 is a schematic diagram showing a state in which a plurality of parallel bodies 210 of the assembled battery 1 are connected in series.
- the assembled battery 1 includes a fastening member 50 in addition to the unit cell 10, the frame member 20, the conductive member 30, and the bus bar 40.
- the pair of unit cells 10 are placed on the front and back surfaces of the frame member 20 so as to face each other, and the pair of unit cells 10 are electrically connected via the conductive member 30.
- the bus bar 40 electrically connects the conductive members 30 respectively disposed on the plurality of frame members 20.
- the fastening member 50 integrally fixes a plurality of stacked frame members 20 together.
- the unit cell 10 includes a flat battery body 11 in which a power generation element (not shown) is housed inside an exterior body 11 a formed of a flexible film-like member such as a laminate film. And an electrode tab 12 including a plate-like positive electrode tab 12a and a negative electrode tab 12b provided to be connected to the power generation element inside the outer package 11a and to protrude outward from the end of the outer package 11a.
- the unit cell 10 corresponds to, for example, a lithium ion secondary battery, a polymer lithium battery, a nickel-hydrogen battery, or a nickel-cadmium battery.
- the power generation element to be charged and discharged is covered and sealed with a bag-shaped exterior body 11 a formed by joining the outer peripheral edges of a flexible film-like member.
- the power generation element is configured by further stacking a plurality of layers in which a positive electrode and a negative electrode are stacked via a separator.
- Insertion holes 11b are provided at two corners forming a diagonal of the exterior body 11a of the unit cell 10. The insertion hole 11 b allows the positioning protrusion 21 b provided in the battery body holding portion 21 of the frame member 20 to be inserted.
- the frame member 20 has a pair of unit cells 10 mounted on the front surface and the back surface, respectively.
- the frame member 20 is made of, for example, reinforced plastics, and is provided with a holding portion 21 a formed in a frame shape penetrating along the stacking direction of the unit cells 10. Double-sided tape is affixed to both the front and back surfaces of the holding portion 21a, whereby the battery bodies 11 of the pair of unit cells 10 placed on the front and back surfaces of the holding portion 21a are held by the frame member 20, respectively.
- the frame member 20 is not limited to a penetrating frame shape, and may be configured to hold a pair of unit cells 10 by providing recesses on both sides thereof.
- the battery main body holding portion 21 is provided with a positioning projection 21b.
- the positioning protrusion 21b is inserted through the insertion hole 11b of the exterior body 11a of the unit cell 10.
- the electrode tab connecting portion 22 is provided so as to protrude from both ends of the holding portion 21a.
- the electrode tab connecting portion 22 is a direction that intersects the stacking direction of the unit cells 10 and protrudes outward.
- the electrode tab connecting portion 22 holds the conductive member 30 in a state where the U-shaped conductive member 30 is inserted.
- the conductive member 30 is disposed in the electrode tab connection portion 22 of the frame member 20, and electrically connects the electrode tabs 12 of the pair of unit cells 10.
- the conductive material 31 of the conductive member 30 is made of, for example, a copper alloy and is formed in a U shape.
- the conductive material 31 is formed in a U shape by connecting two plate-like connecting portions 31a extending in parallel with the extending direction of the electrode tab 12 of the unit cell 10 through the extending portion 31b. .
- the positive electrode tabs 12 a of the pair of unit cells 10 are electrically connected through the conductive material 31.
- the negative electrode tab 12 b of the pair of unit cells 10 is electrically connected via another conductive material 31.
- the bus bar 40 electrically connects the conductive members 30 disposed in the frame members 20 adjacent to each other in the stacking direction among the plurality of stacked frame members 20.
- the bus bar 40 is made of, for example, a copper alloy and is formed in a plate shape.
- the bus bars 40 are arranged so as to be alternately arranged at both ends of the adjacent frame members 20 in order to electrically connect the pair of unit cells 10 mounted on each frame member 20 in series. Yes.
- the bus bar 40 and the conductive member 30 are bonded together by locally irradiating the contacted portion with a laser and melting it.
- the fastening member 50 integrally fastens a plurality of stacked frame members 20 as shown in FIGS.
- the fastening member 50 includes an upper plate 51, a lower plate 52, and a plurality of fastening bolts 53.
- the upper plate 51 and the lower plate 52 are made of metal, for example, and are formed in a plate shape.
- insertion holes 51a for inserting the fastening bolts 53 are provided.
- screw grooves 52a for screwing the screw threads 53a formed at the tips of the fastening bolts 53 are provided.
- the fastening bolt 53 is inserted into the insertion holes 21 c of the plurality of frame members 20 via the upper plate 51 and then screwed into the screw grooves 52 a of the lower plate 52.
- the pair of conductive materials 31 connect the positive electrode tabs 12 a adjacent to each other in the stacking direction of the frame member 20, and connect the negative electrode tabs 12 b to each other. 10 are electrically connected in parallel.
- a parallel body 210 is constituted by the pair of unit cells 10, the frame member 20 and the conductive member 30 shown in FIG. 5. The parallel body 210 corresponds to one form of the battery module.
- a plurality of parallel bodies 210 can be electrically arranged in series. Specifically, one parallel body 210a and another parallel body 210b are stacked. The other parallel body 210b is rotated 180 degrees, for example, in the direction intersecting the stacking direction of the frame members 20 with respect to the one parallel body 210a (that is, rotated 180 degrees around the stacking direction as the rotation axis). Are stacked on one parallel body 210a.
- the bus bar 40 electrically connects the conductive member 30 that conducts the positive electrode tab 12a of one parallel body 210a and the conductive member 30 that conducts the negative electrode tab 12b of another parallel body 210b.
- the assembled battery 1 includes a unit cell 10, a frame member 20, a conductive member 30, and a bus bar 40.
- the cell 10 includes a battery body 11 in which a power generation element (not shown) is housed in an exterior body 11a, a positive electrode tab 12a and a negative electrode that are connected to the power generation element (not shown) and project from the end of the exterior body 11a. And an electrode tab 12 having an electrode tab 12b.
- On the frame member 20, a pair of unit cells 10 are placed on the front surface and the back surface, respectively.
- the conductive member 30 is disposed on the frame member 20 and electrically connects the electrode tabs 12 of the pair of unit cells 10.
- the bus bar 40 electrically connects the conductive members 30 disposed on the frame members 20 adjacent to each other in the stacking direction among the plurality of stacked frame members 20.
- the battery body 11 in which the power generation element (not shown) is housed in the exterior body 11a and the power generation element (not shown) connected to the power generation element (not shown) and projecting from the end of the exterior body 11a are provided.
- a unit cell 10 including an electrode tab 12 including a positive electrode tab 12a and a negative electrode tab 12b is prepared.
- the manufacturing method of the assembled battery 1 has a cell holding process, an electrode tab connection process, and a conductive member connection process. In the unit cell holding step, the pair of unit cells 10 are mounted on the front surface and the back surface, respectively, using the frame member 20.
- the electrode tabs 12 of the pair of unit cells 10 are electrically connected to each other using the conductive member 30 disposed on the frame member 20.
- the bus members 40 are used to electrically connect the conductive members 30 disposed on the frame members 20 adjacent to each other in the stacking direction among the plurality of stacked frame members 20.
- the pair of unit cells 10 are placed on the frame member 20, and the conductive member 30 connects the electrode tabs 12 of the pair of unit cells 10 to each other.
- the bus bars 40 connect the adjacent conductive members 30 to each other.
- the assembled battery 1 after assembly can ensure electrical reliability without the electrode tab 12 of the cell 10 being easily deformed even when an external force is applied.
- the pair of single cells 10 are not easily opened or short-circuited, and the electrical reliability is high.
- the assembled battery 1 can be easily assembled without depending on the dimensional error or positioning accuracy of the members. Specifically, even if the positions of the electrode tabs 12 of the pair of unit cells 10 are relatively displaced in the extending direction of the electrode tabs 12, the electrode tabs 12 are not directly connected to each other via the conductive member 30. Since it is the structure connected indirectly, the assembled battery 1 can be assembled without considering the relative position shift of the electrode tab 12. Similarly, even if the position of the bus bar 40 that electrically connects the conductive members 30 is relatively shifted, the bus bars 40 are arranged independently of each other. The assembled battery 1 can be assembled without doing so. As described above, even if the number of members increases, the assembly can be performed without depending on the shape error or positioning error of each member constituting the assembled battery 1, and thus it is extremely difficult to configure the members by stacking them. Great effect.
- the positive electrode tabs 12a adjacent to each other in the stacking direction of the frame member 20 are connected via one conductive member 30, and the negative electrode tabs 12b are connected via another conductive member 30, You may comprise the parallel body 210 which connected the cell 10 electrically in parallel.
- the conductive member 30 is used to connect the positive electrode tabs 12 a adjacent to each other in the stacking direction of the frame member 20, and the negative electrode tab 12 b. You may connect each other.
- a parallel body 210 is configured by electrically connecting a pair of unit cells 10 in parallel.
- the parallel body 210 can be configured by electrically connecting the pair of unit cells 10 in parallel with the simple configuration as described above. Since it can do, the handling at the time of forming the assembled battery 1 becomes very easy.
- the bus bar 40 electrically connects the conductive member 30 that conducts the positive electrode tabs 12a of one parallel body 210a and the conductive member 30 that conducts the negative electrode tabs 12b of another parallel body 210b in series.
- the conductive member connecting step uses the bus bar 40, the conductive member 30 that conducts the positive electrode tabs 12a of one parallel body 210a, and the conductive member 30 that conducts the negative electrode tabs 12b of the other parallel body 210b, Are electrically connected in series.
- a pair of unit cells 10 connected in parallel are connected in series according to a required voltage value by the simple configuration as described above. Since it can do, the handling at the time of forming the assembled battery 1 becomes very easy.
- the frame member 20 may be formed in a frame shape penetrating so that the pair of unit cells 10 directly face each other.
- the pair of unit cells 10 can be held by the frame member 20 in a state where the pair of unit cells 10 are brought close to or in contact with each other. Therefore, a pair of unit cells 10 can be stacked with high density. Furthermore, when forming the frame member 20, it is easier to process the both sides of the frame member 20 than to provide recesses on both sides, and thus the manufacturing cost of the frame member 20 can be reduced. Furthermore, the frame member 20 can be reduced in weight.
- Modification 1 of the first embodiment An assembled battery 1 and a method for manufacturing the assembled battery 1 according to Modification 1 of the first embodiment will be described with reference to FIGS.
- FIG. 7 is an exploded perspective view showing the battery module 120 of the assembled battery 1 in an exploded manner.
- FIG. 8 is an exploded end view showing an essential part of the battery module 120 of the assembled battery 1 in an exploded manner.
- FIG. 8A shows a part along the line C-C ′ in FIG. 7 in an end view.
- FIG. 8B shows a part along the line D-D ′ of FIG. 7 in an end view.
- FIG. 9 is a schematic diagram showing the serial body 220 of the assembled battery 1.
- FIG. 10 is a schematic diagram showing a state in which a plurality of series bodies 220 of the assembled battery 1 are connected in series.
- the assembled battery 1 according to the first modification of the first embodiment has a configuration in which a pair of unit cells 10 are connected in series without being electrically connected in parallel with the configuration of the assembled battery 1 according to the first embodiment described above. Different.
- the conductive member 30 of the assembled battery 1 includes conductive materials 32 and 33 in addition to the conductive material 31 described above.
- the conductive materials 32 and 33 are made of, for example, a copper alloy and are formed in an L shape.
- the conductive materials 32 and 33 restrict the width in the longitudinal direction and the height direction so that they are not electrically connected to each other even if they are arranged adjacent to the electrode tab connection portion 22 of the frame member 20.
- the conductive materials 32 and 33 are disposed on one electrode tab connection portion 22 provided on the frame member 20.
- the conductive material 32 is disposed such that the L-shaped refracted portion faces upward in FIG. 7 or FIG.
- the conductive material 32 is in contact with the positive electrode tab 12a of the unit cell 10 located above the pair.
- the conductive material 33 is disposed such that the L-shaped refracted portion faces downward in FIG. 7 or FIG.
- the conductive material 33 is in contact with the negative electrode tab 12b of the unit cell 10 located below the pair.
- the conductive material 31 is disposed on the other electrode tab connecting portion 22 provided on the frame member 20 so as to face the conductive materials 32 and 33.
- the conductive material 31 electrically connects the pair of unit cells 10 in series by connecting the positive electrode tab 12a and the negative electrode tab 12b adjacent to each other in the stacking direction of the frame member 20.
- a series body 220 is constituted by the pair of unit cells 10, the frame member 20 and the conductive member 30 shown in FIG. 9.
- the serial body 220 corresponds to one form of the battery module.
- a plurality of serial bodies 220 can be electrically arranged in series. Specifically, one serial body 220a and another serial body 220b are stacked. The other series body 220b is laminated on the one series body 220a in a state where the other series body 220b is rotated by 180 degrees, for example, in a direction intersecting the lamination direction of the frame member 20 with respect to the one series body 220a.
- the bus bar 40 electrically connects the conductive member 30 that conducts the positive electrode tab 12a of one series body 220a and the conductive member 30 that conducts the negative electrode tab 12b of another series body 220b.
- the positive electrode tab 12a and the negative electrode tab 12b that are adjacent to each other in the stacking direction of the frame member 20 are connected via the conductive member 30 to form a series body 220 in which the pair of unit cells 10 are electrically connected in series.
- the electrode tab connection step uses the conductive member 30 to connect the positive electrode tab 12 a and the negative electrode tab 12 b that are adjacent to each other in the stacking direction of the frame member 20. Good. A pair of single cells 10 are electrically connected in series to form a series body 220.
- the series body 220 can be configured by electrically connecting the pair of unit cells 10 in series with the simple configuration as described above. Since it can do, the handling at the time of forming the assembled battery 1 becomes very easy.
- the error is absorbed and provided in the pair of unit cells 10 via the conductive member 30.
- the electrode tabs 12 having different polarities can be easily connected. Therefore, it is very easy to configure the series body 220 using the pair of unit cells 10 and form a series circuit.
- the bus bar 40 electrically connects in series the conductive member 30 that conducts the positive electrode tab 12a of one series body 220a and the conductive member 30 that conducts the negative electrode tab 12b of another series body 220b.
- the conductive member connecting step uses the bus bar 40 to electrically connect the conductive member 30 that conducts the positive electrode tab 12a of one series body 220a and the conductive member 30 that conducts the negative electrode tab 12b of another series body 220b. Connected in series.
- a pair of unit cells 10 connected in series are further serially connected in accordance with a required voltage value by the simple configuration as described above. Since it can connect, the handling at the time of forming the assembled battery 1 becomes very easy.
- FIG. 11 is an exploded perspective view showing a state in which a plurality of battery modules 300 of the assembled battery 1 are stacked.
- FIG. 12 is an exploded perspective view showing a state where a plurality of battery modules 300 of the assembled battery 1 are disassembled.
- FIG. 13 is an exploded perspective view showing the battery module 300 of the assembled battery 1 in an exploded manner.
- the assembled battery 1 according to the second modification of the first embodiment has the configuration in which the positive electrode tab 312a and the negative electrode tab 312b of the unit cell 310 are protruded from only one end without protruding from both ends of the exterior body 311a, as described above. It differs from the structure of the assembled battery 1 which concerns on 1st Embodiment.
- FIG. 11 shows a state where stacked battery modules 300 are connected by a bus bar 340. Specifically, a pair of unit cells 10 are electrically connected in parallel as shown in FIG. 13, and then two battery modules 300 are stacked as shown in FIG.
- the battery module 300 includes a single battery 310, a frame member 320, a conductive member 330, and a bus bar 340.
- the basic configuration of the unit cell 310, the frame member 320, the conductive member 330, and the bus bar 340 is the same as that of the unit cell 10, the frame member 20, the conductive member 30, and the bus bar 40 described above, except for the electrode tab. This is the same as the typical configuration.
- the positive electrode tab 312a and the negative electrode tab 312b of the electrode tab 312 are respectively protruded from one end of the exterior body 311a.
- the frame member 320 is provided with two electrode tab connection portions 322 protruding from one end.
- the conductive member 330 includes a pair of conductive materials 331 each formed in a U-shape. The pair of conductive materials 331 are disposed on the two electrode tab connection portions 322, respectively.
- the other frame member 320b is laminated on the one frame member 320a in a state where the front surface side and the back surface side are reversed with respect to the one frame member 320a.
- the bus bar 340 connects the conductive materials 331 disposed adjacent to each other in the vertical direction. Specifically, the bus bar 340 electrically conducts the positive electrode tab 312a of the unit cell 310 placed on one frame member 320a and the negative electrode tab 312b of the unit cell 310 placed on the other frame member 320b. They are electrically connected in series via a material 331.
- the unit cell 310 has a configuration in which a positive electrode tab 312a and a negative electrode tab 312b are provided so as to protrude from the same end of the exterior body 311a.
- the assembled battery 1 configured in this way, when it is desirable to collect current from only one side of the assembled battery 1, not from both sides, from the shape of the installation space, avoidance of interference with other members, insulation, etc. Can be applied.
- a configuration may be adopted in which one frame member 320a and another frame member 320b in which the front surface side and the back surface side are reversed with respect to the one frame member 320a are laminated.
- the bus bar 340 conducts the conductive member 30 that conducts the positive electrode tab 12a of the single battery 10 placed on one frame member 320a and the conductive member 30 that conducts the negative electrode tab 12b of the single battery 10 placed on the other frame member 320b.
- the members 30 are electrically connected in series.
- a pair of unit cells 10 connected in parallel according to a required voltage value even if the current is collected from only one side of the assembled battery 1 instead of both sides. Can be connected in series.
- FIG. 14 is a perspective view showing the assembled battery 2.
- FIG. 15 is an exploded perspective view showing an essential part of the assembled battery 2 in an exploded manner.
- FIG. 16 is an end view showing a part of the assembled battery 2 shown in FIG. 14 along the line EE ′.
- the battery pack 2 according to the second embodiment is different from the battery pack 1 according to the first embodiment described above in that the connection member 60 for connecting the bus bar 40 is provided.
- the connecting member 60 connects a plurality of bus bars 40 arranged in the stacking direction while being electrically insulated from each other.
- the connecting member 60 is made of plastics, for example, and is formed in a rectangular shape.
- the connecting member 60 includes a bus bar holding plate 61 that is joined to the frame member 20, and flanges 62 to 64 that anchor the bus bar 40.
- the bus bar holding plate 61 is provided with a plurality of insertion holes 61a.
- the insertion hole 61a allows the electrode tab connection portion 22 of the frame member 20 to be inserted.
- the positioning holes 61b provided at the edge of the bus bar holding plate 61 allow the positioning protrusions 21d provided on the outer peripheral surface of the frame member 20 to be inserted.
- the flanges 62 to 64 are made of plastics, for example, and are each formed in a rectangular shape. A pair of flanges 62 are provided so as to face the upper and lower sides of the insertion hole 61a of the bus bar holding plate 61, and hold the bus bar 40 from the upper and lower directions.
- the flanges 63 and 64 are provided so as to face the left and right of the insertion hole 61a of the bus bar holding plate 61, and hold the bus bar 40 from the left and right directions.
- the flange portion 62 of the connecting member 60 is provided with a plurality of cuts in a direction intersecting with the stacking direction of the frame member 20. Therefore, the flange part 62 of the connecting member 60 can move and hold the bus bar 40 in the stacking direction of the frame member 20 by bending the outer shape using a plurality of cut portions.
- the assembled battery 2 is configured to further include a connecting member 60 that electrically insulates and connects a plurality of bus bars 40 arranged in the stacking direction.
- the connecting member 60 can be attached to the frame member 20 that is stacked. Therefore, the assembled battery 2 can be easily assembled and the time required for assembling the assembled battery 2 can be shortened.
- the connecting member 60 may be configured to hold the bus bar 40 so as to be movable in the stacking direction of the frame member 20.
- the positions of the plurality of bus bars 40 can be relatively varied in a state where the plurality of bus bars 40 are connected to the single connection member 60. Therefore, when a stacking error occurs in the stacking direction of the frame member 20 by stacking a plurality of the frame members 20 or when a dimensional error occurs in the single frame member 20, these errors are transferred to the bus bar 40. Can be absorbed by the connecting member 60. As described above, the assembled battery 2 can be assembled without depending on the stacking error in the stacking direction of the plurality of frame members 20 or the dimensional error of the single frame member 20. Can be improved.
- FIG. 17 is a perspective view showing the assembled battery 3.
- FIG. 18 is an exploded perspective view showing an essential part of the assembled battery 3 in an exploded manner.
- FIG. 19 is an end view showing a part of the battery pack 3 along the line FF ′ shown in FIG.
- the assembled battery 3 according to the third embodiment is different from the assembled battery 2 according to the second embodiment described above in that the deformed portions 71 to 73 that can deform the bus bar 70 are provided.
- the bus bar 70 is electrically connected to the conductive member 30 while being connected to the connecting member 60.
- the bus bar 70 is made of, for example, a copper alloy and is formed in a plate shape having a plurality of refractive portions.
- the bus bar 70 includes a pair of deformed portions 72 that are convex in the direction intersecting the stacking direction of the frame members 20 and away from the frame members 20, and the frame.
- a deformation portion 73 that is a convex portion is provided in a direction close to the member 20.
- the deformation part 73 is provided between the pair of deformation parts 72.
- the bus bar 70 can deform the pair of deformable portions 72 and the deformable portion 73 configured like a plate spring having irregularities.
- the deforming portions 71 to 73 can be used by being elastically deformed, for example, by being formed of a copper alloy, as long as the deforming portions 71 to 73 are not plastically deformed beyond a predetermined deformation amount.
- the assembled battery 3 has a configuration in which the bus bar 70 is provided with deformable portions 71 to 73 that can be deformed in the stacking direction of the frame member 20.
- the assembled battery 3 configured as described above, even when a stacking error occurs in the stacking direction of the frame member 20 by stacking a plurality of the frame members 20, the stacking error is corrected by the deformed portions 71 to 73 can be absorbed. Further, even when a dimensional error occurs in the frame member 20 itself, the dimensional error can be absorbed by the deforming portions 71 to 73 of the bus bar 70. Therefore, the assembled battery 3 can be assembled without depending on the stacking error in the stacking direction of the plurality of frame members 20 or the dimensional error of the single frame member 20, thereby improving the productivity of the assembled battery 3. be able to.
- deformable portions 71 to 73 may be configured to be elastically deformable.
- the deforming portions 71 to 73 can be deformed again.
- 1,2,3 batteries 10,310 cells, 11,311 battery body, 11a, 311a exterior body, 11b, 311b insertion hole, 12,312 electrode tabs, 12a, 312a positive electrode tab, 12b, 312b negative electrode tab, 20, 320, 320a, 320b frame member, 21, 321 Battery body holding part, 21a, 321a holding part, 21b, 21d, 321b positioning protrusion, 21c, 321c insertion hole, 22,322 electrode tab connections, 30, 330 conductive member, 31, 32, 33, 331 conductive material, 31a, 32a, 33a connection part, 31b, 32b, 33b extending part, 40, 70, 340 bus bar, 71, 72, 73 deformation part, 50 fastening members, 51 upper plate, 51a insertion hole, 52 Lower plate, 52a thread groove, 53 fastening bolts, 53a Thread, 60 connecting members, 61 Busbar holding plate, 61a insertion hole, 61b positioning hole, 62, 63, 64 buttocks
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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
第1実施形態に係る組電池1およびその組電池1の製造方法について、図1~図6を参照しながら説明する。
第1実施形態の変形例1に係る組電池1およびその組電池1の製造方法について、図7~図10を参照しながら説明する。
第1実施形態の変形例2に係る組電池1について、図11~図13を参照しながら説明する。
第2実施形態に係る組電池2について、図14~図16を参照しながら説明する。
示している。
第3実施形態に係る組電池3について、図17~図19を参照しながら説明する。
示している。
10,310 単電池、
11,311 電池本体、
11a,311a 外装体、
11b,311b 挿通孔、
12,312 電極タブ、
12a,312a 正極電極タブ、
12b,312b 負極電極タブ、
20,320,320a,320b フレーム部材、
21,321 電池本体保持部、
21a,321a 保持部、
21b,21d,321b 位置決め突起、
21c,321c 挿通孔、
22,322 電極タブ接続部、
30,330 導電部材、
31,32,33,331 導電材、
31a,32a,33a 接続部、
31b,32b,33b 延在部、
40,70,340 バスバ、
71,72,73 変形部、
50 締結部材、
51 アッパープレート、
51a 挿通孔、
52 ロアプレート、
52a ネジ溝、
53 締結ボルト、
53a ネジ山、
60 連結部材、
61 バスバ保持プレート、
61a 挿通孔、
61b 位置決め孔、
62,63,64 鉤部、
110,120,300 電池モジュール、
210,210a,210b 並列体、
220,220a,220b 直列体。
Claims (17)
- 発電要素を外装体に収納した電池本体と、前記発電要素に接続し前記外装体の端部からそれぞれ突出して設けた正極電極タブおよび負極電極タブを備える電極タブと、を含む単電池と、
一対の前記単電池を表面と裏面にそれぞれ載置したフレーム部材と、
前記フレーム部材に配設し、一対の前記単電池の前記電極タブ同士を電気的に接続する導電部材と、
複数積層した前記フレーム部材のうち、積層方向に隣接した前記フレーム部材に配設された前記導電部材同士をそれぞれ電気的に接続するバスバと、を有する組電池。 - 前記フレーム部材の積層方向で互いに隣り合う前記正極電極タブ同士を一の前記導電部材を介して接続し、かつ、前記負極電極タブ同士を他の前記導電部材を介して接続し、一対の前記単電池を電気的に並列接続した並列体を構成する請求項1に記載の組電池。
- 一の前記並列体と、
一の前記並列体に対して積層方向と交差する方向に回転させた状態で一の前記並列体に積層する他の前記並列体と、を備え、
前記バスバは、一の前記並列体の前記正極電極タブ同士を導電させる前記導電部材と、他の前記並列体の前記負極電極タブ同士を導電させる前記導電部材と、を電気的に直列接続する請求項2に記載の組電池。 - 前記フレーム部材の積層方向で互いに隣り合う前記正極電極タブと前記負極電極タブとを前記導電部材を介して接続し、一対の前記単電池を電気的に直列接続した直列体を構成する請求項1に記載の組電池。
- 一の前記直列体と、
一の前記直列体に対して積層方向と交差する方向に回転させた状態で一の前記直列体に積層する他の前記直列体と、を備え、
前記バスバは、一の前記直列体の前記正極電極タブを導電させる前記導電部材と、他の前記直列体の前記負極電極タブを導電させる前記導電部材と、を電気的に直列接続する請求項4に記載の組電池。 - 前記単電池は、正極電極タブおよび負極電極タブを、前記外装体の同一の端部からそれぞれ突出して設けた請求項1、2、または4のいずれか1項に記載の組電池。
- 一の前記フレーム部材と、一の前記フレーム部材に対して表面側と裏面側を反転させた他の前記フレーム部材とを積層し、
前記バスバは、一の前記フレーム部材に載置した前記単電池の前記正極電極タブを導電させる前記導電部材と、他の前記フレーム部材に載置した前記単電池の前記負極電極タブを導電せる前記導電部材と、を電気的に直列接続する請求項6に記載の組電池。 - 前記フレーム部材は、一対の前記単電池が対面するように貫通した枠形状に形成している請求項1~7のいずれか1項に記載の組電池。
- 積層方向に複数配設した前記バスバを互いに電気的に絶縁させて連結する連結部材をさらに有する請求項1~8のいずれか1項に記載の組電池。
- 前記連結部材は、前記バスバを前記フレーム部材の積層方向に対して移動可能に保持する請求項9に記載の組電池。
- 前記バスバは、前記フレーム部材の積層方向に対して変形可能な変形部を設けた請求項9または10に記載の組電池。
- 前記変形部は、弾性変形可能である請求項11に記載の組電池。
- 発電要素を外装体に収納した電池本体と、前記発電要素に接続し前記外装体の端部からそれぞれ突出して設けた正極電極タブおよび負極電極タブを備える電極タブと、を含む単電池を用意し、
フレーム部材を用いて、一対の前記単電池を表面と裏面にそれぞれ載置する単電池保持工程と、
前記フレーム部材に配設する導電部材を用いて、一対の前記単電池の前記電極タブ同士を電気的に接続する電極タブ接続工程と、
バスバを用いて、複数積層した前記フレーム部材のうち、積層方向に隣接した前記フレーム部材に配設された前記導電部材同士をそれぞれ電気的に接続する導電部材接続工程と、を有する組電池の製造方法。 - 前記電極タブ接続工程は、前記導電部材を用いて、前記フレーム部材の積層方向で互いに隣り合う、前記正極電極タブ同士を接続し、かつ、前記負極電極タブ同士を接続することによって、一対の前記単電池を電気的に並列接続して並列体を構成する請求項13に記載の組電池の製造方法。
- 他の前記並列体を一の前記並列体に対して前記フレーム部材の積層方向と交差する方向に回転させた状態で一の前記並列体に積層させた後、
前記導電部材接続工程は、前記バスバを用いて、一の前記並列体の前記正極電極タブ同士を導電させる前記導電部材と、他の前記並列体の前記負極電極タブ同士を導電させる前記導電部材と、を電気的に直列接続させる請求項14に記載の組電池の製造方法。 - 前記電極タブ接続工程は、前記導電部材を用いて、前記フレーム部材の積層方向で互いに隣り合う、前記正極電極タブと前記負極電極タブとを接続することによって、一対の前記単電池を電気的に直列接続して直列体を構成する請求項13に記載の組電池の製造方法。
- 他の前記直列体を一の前記直列体に対して前記フレーム部材の積層方向と交差する方向に回転させた状態で一の前記直列体に積層させた後、
前記導電部材接続工程は、前記バスバを用いて、一の前記直列体の前記正極電極タブを導電させる前記導電部材と、他の前記直列体の前記負極電極タブを導電させる前記導電部材と、を電気的に直列接続させる請求項16に記載の組電池の製造方法。
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Also Published As
Publication number | Publication date |
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EP2919294A4 (en) | 2015-10-21 |
CN104769746B (zh) | 2017-10-03 |
JPWO2014073443A1 (ja) | 2016-09-08 |
CN104769746A (zh) | 2015-07-08 |
US20150303415A1 (en) | 2015-10-22 |
KR20150060830A (ko) | 2015-06-03 |
EP2919294B1 (en) | 2017-09-06 |
JP6079785B2 (ja) | 2017-02-22 |
EP2919294A1 (en) | 2015-09-16 |
KR101732285B1 (ko) | 2017-05-02 |
US9865849B2 (en) | 2018-01-09 |
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