WO2006112251A1 - 電池間接続構造 - Google Patents
電池間接続構造 Download PDFInfo
- Publication number
- WO2006112251A1 WO2006112251A1 PCT/JP2006/306857 JP2006306857W WO2006112251A1 WO 2006112251 A1 WO2006112251 A1 WO 2006112251A1 JP 2006306857 W JP2006306857 W JP 2006306857W WO 2006112251 A1 WO2006112251 A1 WO 2006112251A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- battery
- inter
- battery connection
- connection structure
- connection
- Prior art date
Links
- 238000004519 manufacturing process Methods 0.000 title description 8
- 238000003466 welding Methods 0.000 claims abstract description 51
- 238000007789 sealing Methods 0.000 claims description 29
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 17
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 16
- 230000002093 peripheral effect Effects 0.000 claims description 16
- 229910001369 Brass Inorganic materials 0.000 claims description 12
- 239000010951 brass Substances 0.000 claims description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 9
- 229910052802 copper Inorganic materials 0.000 claims description 9
- 239000010949 copper Substances 0.000 claims description 9
- 229910052759 nickel Inorganic materials 0.000 claims description 9
- 229910052742 iron Inorganic materials 0.000 claims description 8
- 239000003973 paint Substances 0.000 claims description 7
- 239000002994 raw material Substances 0.000 claims 1
- 230000000191 radiation effect Effects 0.000 abstract 1
- 239000013585 weight reducing agent Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 15
- 230000017525 heat dissipation Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- 238000009423 ventilation Methods 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 238000003491 array Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000002788 crimping Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 229910052987 metal hydride Inorganic materials 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- -1 nickel metal hydride Chemical class 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- 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
- H01M50/514—Methods for interconnecting adjacent batteries or cells
- H01M50/516—Methods for interconnecting adjacent batteries or cells by welding, soldering or brazing
-
- 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
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/107—Primary casings; Jackets or wrappings characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—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
- H01M50/509—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
-
- 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
- H01M50/514—Methods for interconnecting adjacent batteries or cells
- H01M50/517—Methods for interconnecting adjacent batteries or cells by fixing means, e.g. screws, rivets or bolts
-
- 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
- H01M50/521—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the material
- H01M50/522—Inorganic material
-
- 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
- H01M50/521—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the material
- H01M50/526—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the material having a layered structure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M6/00—Primary cells; Manufacture thereof
- H01M6/42—Grouping of primary cells into batteries
Definitions
- the present invention relates to an inter-battery connection structure for constituting a battery module or a battery pack that obtains a required output voltage by connecting a plurality of cylindrical batteries in series or in parallel.
- a power source as described above is assembled into a battery module or a battery pack by connecting different polar power source terminals of a plurality of cylindrical batteries to each other.
- the battery-to-battery connection structure used to make up this battery module or battery pack is roughly divided into two types depending on the battery arrangement. One of them is, as shown in FIG. 8, in which a plurality of batteries Bal and Ba2 are arranged along the axial direction, and two adjacent batteries Bal and Ba2 are connected in series with each other ( For example, see Patent Document 1).
- a dish-like connection body 50 arranged between two batteries Bal and Ba2 is connected to a sealing plate 52 provided with a metal cap 51 serving as a positive terminal of one battery Bal, and the other.
- Each battery is connected to the battery case which is the negative terminal of the Ba by process welding.
- connection body 50 contacts the cylindrical portion 50a that fits outside the battery case 53 and the sealing plate 52.
- the projection 50c is formed at equal intervals of 90 ° on the same radius on the inner surface of the cylindrical portion 50a and the outer surface of the planar portion 50b. Projection welding is performed through the cistern 50c, so that the flat part 50b of the connection body 50 is connected to the sealing plate 52 electrically connected to the metal cap 51 in one battery Bal, and the cylindrical part 50a is connected to the other battery. It is connected to the battery case 53 of Ba2.
- the battery case 53 of the battery Bal and the connector 50 are prevented from being electrically short-circuited by an insulating ring. Thereby, both batteries Bal and Ba2 are electrically connected in series.
- another inter-battery connection structure is one in which a plurality of batteries Ba3 and Ba4 are juxtaposed in the radial direction and connected in series by a connection member 59 (see, for example, Patent Document 2).
- a connection member 59 see, for example, Patent Document 2.
- the outer surface of the positive electrode terminal 60 on one end face of one battery Ba3 and the exposed bottom 55a of the battery case 55 that also serves as the other end face of the other battery Ba4 are flush with each other.
- the connection member 59 is interposed between the two, and the connection member 59 and the batteries Ba3 and Ba4 are welded and electrically connected. It is configured. That is, the first connecting portion 61 of the connecting member 59 is welded to the bottom portion 55a of the battery case 55, and the annular recess 63 of the second connecting portion 62 is welded to the sealing plate 64.
- Patent Document 1 JP 2003-162993 A
- Patent Document 2 Japanese Patent Laid-Open No. 2002-246005
- the inter-battery connection structure of FIG. 8 can only connect the batteries Bal and Ba2 in series in an arrangement along the battery axial direction.
- battery arrays in which a certain number of batteries are connected in series are juxtaposed, and when connecting two batteries that are adjacent to each other in the radial direction at both ends of the battery arrays, the connecting body 50 It is necessary to use a different connection member.
- the inter-battery connection structure of FIG. 9 can only connect a plurality of batteries in series in a juxtaposed state in which the battery axes are arranged in parallel to each other. When connecting in series, for example, it is necessary to use a connection member as shown in FIG.
- the conventional inter-battery connection structure requires two types of connection members having different shapes respectively corresponding to the series arrangement in the battery axial direction and the arrangement in the radial direction.
- the cost of parts including the mold increases with the need for two types of connecting members, and the manufacturing cost is high.
- the battery pack becomes expensive.
- two adjacent batteries are connected by welding the connecting members, so if some of the batteries are consumed or deteriorated during battery module maintenance, the batteries The entire module has to be replaced and running costs are high
- a large cylindrical battery such as a Nikkenore hydrogen battery having a large capacity of about lOOAh and a weight of about 1.6 kg will be put to practical use.
- a large cylindrical battery is constructed using the inter-battery connection structure shown in Fig. 8 or 9, a battery module or a battery pack is constructed. The process becomes difficult and the weight of the connecting member increases, and it is also difficult to secure sufficient strength when subjected to an impact, so it is extremely difficult to put it to practical use. Is done.
- the present invention has been made in view of the above-described conventional problems, and a plurality of cylindrical batteries are arranged between the same batteries in both of the axial arrangement in series and the radial arrangement. Reduces costs by connecting two adjacent parts to each other with a connecting plate
- the purpose of the present invention is to provide a battery-to-battery connection structure that can achieve a structure having sufficient robustness and light weight when connecting large cylindrical batteries, and that can be easily disassembled. .
- the bottom surface of the bottomed cylindrical battery case is used as one electrode terminal, and the sealing body provided on the open end side of the battery case is provided on the other side.
- a plurality of cylindrical batteries as electrode terminals are provided, and these cylindrical batteries are arranged in series in the axial direction or juxtaposed in the radial direction so that the opposite electrode terminals of each two adjacent cylindrical batteries are electrically connected to each other.
- a battery-to-battery connection plate that integrally includes a welded portion that is included in the circular end surface of the battery case and a connecting portion that extends from the welded portion, The welded portion is welded to one electrode terminal and the other electrode terminal of the battery case, respectively, and the inter-battery connection plate is fixed, and the inter-battery battery is fixed to each of two adjacent cylindrical batteries.
- the connecting portions of the connecting plates are connected to each other. Are those connected to the electrical connection superimposed.
- the welded portion of the inter-battery connection plate since the welded portion of the inter-battery connection plate has a shape contained in the circular end surface of the battery case, the welded portion is located on both end surfaces of the battery case in the battery axial direction. It can be fixed by welding to any of the electrode terminals, and in this fixed state, the connecting portion of the inter-battery connection plate protrudes to the side of the cylindrical battery. Therefore, when two cylindrical batteries are arranged along the battery axial direction, the connecting portions of the inter-battery connection plates fixed to the batteries are overlapped with each other in a relative arrangement in the same direction. By connecting them, it is possible to connect two adjacent batteries in series.
- connection portions are connected to each other in a superposed state on the side of the cylindrical battery, for example, by using a connecting means other than welding, such as a bolt and nut fastening means, a large cylindrical shape is adopted. Even when batteries are connected, the manufacturing process is facilitated by reducing the welding process for connecting the batteries, and with the simplification of the configuration, there is an impact without increasing the weight of the connection part. It is possible to obtain a structure having high robustness that can sufficiently secure the strength when the squeezed. In addition, if some batteries are worn or deteriorated during maintenance, etc., replace only the necessary batteries by releasing the connection of the two connected parts that are connected in an overlapping state. be able to.
- a connecting means other than welding such as a bolt and nut fastening means
- the inter-battery connection plate is a single plate and is attached in a state in which the connection part protrudes to the side of the cylindrical battery, a plurality of cylindrical batteries are arranged in series in the axial direction. Regardless of the arrangement in which they are arranged side by side in the radial direction, a gap allowing ventilation is secured between the two cylindrical batteries connected to each other, and a sufficient heat dissipation effect can be obtained. .
- the inter-battery connection plate in the inter-battery connection structure is provided with a step portion along a boundary between a welded part and a connection part formed in a semicircular arc shape, and the welded part is recessed with respect to the connection part.
- the welded portion of the inter-battery connection plate fits into the recess formed by the caulking portion of the battery case and the outer surface of the sealing plate with respect to the electrode terminal on the side where the cap-shaped terminal protrudes. Since it can be welded while being held in a stable state, it can always be fixed with high joint strength.
- the caulking portion on the opening end side in the battery case is covered with an insulating ring
- the step portion in the inter-battery connection plate is the outer surface on the connecting portion side of the insulating ring.
- the outer surface of the stepped portion of the inter-battery connection plate is stably held in a positioning state where the outer peripheral surface of the insulating ring is in contact with the inner peripheral surface of the insulating ring, and the welded portion of the inter-battery connection plate is connected to the outer surface of the sealing plate. Therefore, it is possible to obtain a highly rigid joining state that can always provide high welding strength without variation.
- a gap is secured between the axial end of the force application part and the connection part, which has the advantage of improving heat dissipation.
- the inter-battery connection plate has an insulating ring. Prevents an electrical short circuit between the battery case and the sealing plate forming the one and the other electrodes, respectively.
- inter-battery connection plate having the same shape if the inter-battery connection plate having the same shape is fixed to either one of the electrode terminals of the battery case, only the inter-battery connection plate having the same shape is used.
- the pair of inter-battery connection plates respectively connected to both electrode terminals of each cylindrical battery in the above-described inter-battery connection structure is an angle between each connection part in the protruding direction from the cylindrical battery
- the pair of inter-battery connection plates fixed to both ends of the cylindrical battery are arranged in a relative arrangement in which the angles formed by these connection parts are arbitrarily set.
- a plurality of cylindrical batteries can be easily accommodated in either a series connection in which a plurality of cylindrical batteries are arranged in the battery axial direction or a series connection in a configuration in which they are juxtaposed in the radial direction.
- the battery modules can be easily manufactured in various arrangement forms such as an arrangement in which a plurality of cylindrical batteries are stacked in a stacked arrangement. To deal with Kill.
- connection parts of the inter-battery connection plates are parallel to each other from the welded part at an interval larger than the semicircular arc diameter of the welded part and less than the diameter of the battery case. If the configuration is formed in a shape surrounded by two sides extending to the side and an end perpendicular to both sides, the connection part of the inter-battery connection plate is connected to the cylindrical battery.
- the location where the two connecting parts are connected to each other can be set within the range of the diameter of the battery case, and a number of cylindrical shapes
- a battery module or a battery pack in which batteries are stacked in a plurality of stages in an easy and stable arrangement can be easily configured.
- this inter-battery connection structure when a pair of connecting holes are formed at both ends near the end of the connection part of the inter-battery connection plate, the connection between two adjacent batteries is performed.
- the plates can be connected to each other by matching these connecting holes, and each 2
- the individual cylindrical batteries can be connected to each other without welding.
- slight variations in the relative positions of adjacent cylindrical batteries can be absorbed by the connecting holes, when the cylindrical batteries are arranged along the battery axial direction or juxtaposed in the radial direction, they are cylindrical. A degree of freedom arises in positioning the relative position of the battery, facilitating position adjustment.
- the two adjacent inter-battery connection plates are overlapped with each other at the relative positions where the respective connection portions match the connecting holes.
- the two battery connection plates that make P contact are aligned with the boreholes by matching these connection holes. Since it can be connected by tightening the nut, it is possible to reduce the welding process when connecting two cylindrical batteries to each other, and to some cylindrical batteries in the battery module or battery pack during maintenance. If wear or deterioration is observed, it is possible to remove the bolts and replace only the necessary cylindrical batteries, compared to replacing the battery module as a unit as before. To, it is possible to significantly reduce the running cost.
- the nut is fixed by welding to one of the connection portions of the two adjacent inter-battery connection plates that are overlapped with each other in an arrangement that matches the coupling hole.
- bolts are inserted into the connected connecting holes and screwed into the nuts. Since it is possible to connect two adjacent cylindrical batteries simply by fastening, workability for connection is greatly improved.
- a plurality of projections for welding to the electrode terminals of the cylindrical battery are provided in the welded portion of the inter-battery connection plate, and between the two adjacent projections.
- the inter-battery connection plate in the inter-battery connection structure described above is either iron, copper, brass, or a material in which nickel is surface-treated at least on one side, or nickel, iron, copper is brass. If the material is made of a material, the inter-battery connection plate having a low electrical resistance can be obtained, so that the output of the battery module or battery pack after manufacture can be further promoted.
- FIG. 1 is a perspective view showing a connection configuration of an inter-battery connection structure according to an embodiment of the present invention.
- FIG. 2 is a perspective view showing an inter-battery connection plate used for the connection structure of the above.
- FIG. 3 is a perspective view showing a battery module configured using the above-described inter-battery connection structure.
- FIG. 4 is an enlarged sectional view taken along line IV-IV in FIG.
- FIG. 5 is an enlarged cross-sectional view taken along line V—V in FIG.
- FIG. 6 is a side view showing a battery pack configured using the inter-battery connection structure.
- FIG. 7 is a partial side view showing another battery pack configured using the inter-battery connection structure.
- FIG. 8 is a longitudinal sectional view showing a conventional inter-battery connection structure.
- FIG. 9 is a longitudinal sectional view showing another conventional inter-battery connection structure.
- FIG. 1 is a perspective view showing a connection configuration of an inter-battery connection structure according to an embodiment of the present invention
- FIG. 2 is a perspective view showing an inter-battery connection plate 1 used for the connection.
- This inter-battery connection plate 1 has a shape in which a welded part 2 fixed to a battery case 7 by welding means and a connecting part 3 extending from the welded part 2 are connected together via a stepped part 4.
- the weld 2 is recessed with respect to the connection 3.
- the weld 2 has a semicircular arc shape included in a circular end surface of the battery case 7 of the battery Ba shown in FIG. Specifically, the semicircular inner peripheral portion 2a having a slightly larger radius of curvature than the peripheral end surface of the circular electrode terminal plate 8 (Fig. 1) of the battery Ba, and the circular end of the battery case 7 on the opening end side. It has a semicircular arc shape surrounded by a semicircular outer peripheral portion 2b having a radius of curvature corresponding to the inner peripheral surface of the caulking portion.
- the welding portion 2 is provided with a plurality of resistance welding processes 9 (four in this embodiment), and slits 10 are formed at portions between each of the two processes 9 that are in contact with the P. ing.
- the connecting portion 3 is formed in a substantially rectangular shape having a pair of side sides 3a, 3b and an end side 3c orthogonal to the side side 3a, and the pair of side sides 3a, 3b are welded.
- the parts 2 extend in parallel with each other from the welded part 2 at intervals that are larger than the semicircular arc diameter of the part 2 and slightly smaller than the diameter of the battery case 7.
- the connecting portion 3 is formed with a slit 11 extending in parallel to both sides 3a and 3b from the central portion of the end 3c, and a pair of connecting holes 12 are formed in the vicinity of both ends of the end 3c. ing.
- a pair of nuts 13 are positioned on the connecting portion 3 on the lower surface side of the inter-battery connecting plate 1 shown in FIG. [0032]
- the stepped portion 4 has a semicircular arc shape in plan view rising from the semicircular outer peripheral portion 2b of the welded portion 2, and the outer side surface on the connection portion 3 side is a caulked portion of the opening end portion of the battery case 7. Is formed in a semicircular arc shape with a radius of curvature that matches the inner peripheral surface of the battery, and has a height slightly greater than the distance from the sealing plate 14 of the battery Ba to the axial end of the crimping portion. .
- the inter-battery connecting plate 1 having a shape in which the welded portion 2 and the connecting portion 3 are integrally connected via the stepped portion 4 is made of a material obtained by surface-treating nickel on at least one side such as iron, copper, brass, etc. High output is achieved by integrally forming with nore, iron, copper, brass, etc. and setting it to low electrical resistance.
- FIG. 1 illustrates a state in which the insulating ring 18 is attached in a state of covering the crimped portion on the opening end side of the battery case 7, and details thereof will be described later.
- the inter-battery connection plate 1 has a semicircular arc shape in which the welded portion 2 is included in the circular end surface of the battery case 7, the electrode terminal plate 8 which is a positive electrode terminal in the battery Ba is provided. It can be commonly attached to both the sealed sealing plate 14 and the bottom surface 17 of the battery case 7 serving as a negative electrode terminal.
- the welding portion 2 is placed on the sealing plate 14 of the battery Ba,
- the outer surface of the stepped portion 4 is directed to the inner peripheral surface 18a of the insulating ring 18, the outer surface of the stepped portion 4 is formed in a semicircular arc shape having a curvature radius substantially matching the inner peripheral surface 18a of the insulating ring 18. Therefore, the outer surface of the stepped portion 4 is positioned in close contact with the inner peripheral surface 18a of the insulating ring 18 so that the welded portion can be stably held while the inter-battery connection plate 1 is stably held. 2 can be welded to the sealing plate 14. For this reason, the welded portion 2 and the sealing plate 14 that are welded to each other do not always vary, and a high weld strength is ensured, and a highly robust joined state can be obtained.
- the weld 2 is directed to the bottom surface 17 of the battery case 7 of the battery Ba, and the weld 2 Projection welding is performed with a pair of welding electrodes in contact with portions corresponding to the projection 9 in FIG.
- the welding current flows locally in a concentrated manner at the contact portion between the process 9 and the bottom surface 17 having a large contact resistance because the contact area is small, and the heat generated thereby melts the process 9 to cause the weld 2 And the bottom surface 17 are joined to each other.
- the slit 10 of the welded portion 2 reduces the reactive current during projection welding, and can easily deform and absorb each distortion of the welded portion 2 and the bottom surface 17 due to the presence of the slit 10. Reliable welding can be performed.
- the battery case 7 is opened from the open end side and the bottom surface 17 respectively.
- the connection portions 3 of the two inter-battery connection plates 1 that protrude in the direction of each other are overlapped in an arrangement facing in opposite directions, and positioned in a relative arrangement in which each pair of connecting holes 12 is matched.
- the two battery connection plates 1 are electrically connected to each other by screwing and fastening the bolt 19 inserted from one side of each of the two coupling holes 12 in this overlapped state to the nut 13 on the other side. Connected in a connected state.
- the cylindrical battery Ba is aligned along the battery axial direction. In the case where the cylindrical batteries Ba are juxtaposed or arranged in the radial direction, the relative position of the cylindrical battery Ba is increased, and the position adjustment becomes easy. Further, when connecting the pair of inter-battery connection plates 1 by screwing the bolts 19 and nuts 13 together, the distortion of the two inter-battery electrode plates 1 can be easily deformed and absorbed by the presence of the slits 11. , Reliable screw fastening can be performed.
- this inter-battery connection structure is one of the features that the same inter-battery connection plate 1 can be commonly attached to both the open end side and the bottom surface 17 of the battery case 7. Aligned with the connecting hole 12 on one side of the battery connection plate 1 for mounting on the bottom surface 17 of 7 If the nut 13 is fixed in advance in the arrangement, the connecting operation can be performed more easily and quickly.
- the configuration in which the two inter-battery connection plates 1 are connected by the fastening means of the bolts 19 and the nuts 13 can reduce the welding process when manufacturing the inter-battery connection structure.
- the battery module or battery pack configured using the battery connection structure of Fig. 1 is being used, if the wear or deterioration of some of the cylindrical batteries Ba is observed, the bolt 19 is removed and the required cylindrical shape is removed. Since only the battery Ba can be replaced, there is a great merit that the running cost can be greatly reduced as compared with the case where the battery module or the battery pack is replaced as a unit as in the past.
- the two adjacent battery connection plates 1 may be connected to each other by welding instead of the connecting means for screwing and fastening the bolts 19 and nuts 13 described above.
- the slit 11 acts to reduce the reactive current during welding, and the distortion of the two inter-battery connection plates 1 can be easily deformed and absorbed by the presence of the slit 11 itself. Can be done.
- FIG. 3 shows a battery module 20 configured by electrically connecting six cylindrical batteries Ba in series using the inter-battery connection structure of the present invention
- FIGS. FIG. 4 is an enlarged sectional view taken along line IV-IV and an enlarged sectional view taken along line V-V.
- Fig. 4 shows a part of the inter-battery connection structure in which two adjacent cylindrical batteries Ba are electrically connected in series with each other in the radial arrangement in the battery module 20 as in Fig. 1.
- the different polarities of the two cylindrical batteries Ba are electrically connected to each other by the interconnection of the same two inter-battery connection plates 1. Connected and configured.
- the cylindrical battery Ba to be connected in the inter-battery connection structure is a large-capacity and large-sized nickel-metal hydride battery in this embodiment.
- this cylindrical battery Ba is composed of one end opening force sealing plate 14 of a bottomed cylindrical battery case 7 that also serves as a negative electrode, and an electrode terminal plate 8 joined to the outer surface of the sealing plate 14.
- a cap-shaped positive terminal 21 having a U-shaped cross section fixed to the center of the electrode terminal plate 8, and a rubber valve element 22 disposed in a space between the cap-shaped positive terminal 21 and the electrode terminal plate 8. Further, it is closed by a sealing body 24 constituted by an insulating gasket 23.
- the peripheral edge of the sealing plate 14 and the open end of the battery case 7 are located within the open end of the battery case 7 with an insulating gasket 23 interposed therebetween. Bending and crimping is performed to form the force portion 7a, so that they are fixed to each other in an airtight state via an insulating gasket 23 compressed by the caulking portion 7a.
- FIG. 5 shows a part of an inter-battery connection structure in which two adjacent cylindrical batteries Ba arranged in series in the axial direction in the battery module 20 are connected in series with each other.
- This inter-battery connection structure comprises two identical inter-battery connection plates 1 attached by welding the welded portion 2 to the sealing plate 14 and the bottom surface 17 of the battery case 7 through the connection process described in FIG. They are placed in the same orientation and overlap each other, and each pair of connecting holes 12 is placed at a relative position where they are matched, and passed through from one side of each of the two connecting holes 12 in a state of being overlapped with each other.
- the two inter-battery connection plates 1 are connected to each other in an electrically connected state. Even during this connection, as in the case of the inter-battery connection structure of FIG. 4, the distortion of both inter-battery electrode plates 1 can be easily deformed and absorbed by the presence of the respective slits 11. The nut 13 can be securely tightened.
- the inter-battery connection structure shown in FIGS. 4 and 5 has the following remarkable effects. That is, in this inter-battery connection structure, the inter-battery connection plate 1 that connects two adjacent cylindrical batteries Ba to each other has the semicircular arc-shaped weld 2 contained in the circular end surface of the battery case Ba.
- the battery case Ba can be fixed by welding to both the negative electrode terminal composed of the flat bottom surface 17 and the positive electrode terminal where the cap-shaped positive terminal 21 protrudes from the electrode terminal plate 8.
- the connecting portion 3 of the inter-battery connection plate 1 protrudes to the side of the cylindrical battery Ba.
- connection portions 3 of the two inter-cell connection plates 1 fixed to the two adjacent cylindrical batteries Ba are overlapped and connected in the same orientation.
- two cylindrical batteries Ba can be arranged in series in the battery axial direction and connected in series.
- two cylinders arranged in parallel in the radial direction are formed by superposing and connecting the connection portions 3 of the two inter-battery connection plates 1 facing each other in an opposite direction.
- Shaped batteries Ba can be connected in series.
- two adjacent batteries can be connected to each other by the same inter-battery connection plate 1 in both the series arrangement in the battery axial direction and the arrangement in which the cylindrical batteries Ba are juxtaposed in the radial direction.
- the inter-battery connection plate 1 has a simple plate shape and is attached in a state in which the connection portion 3 projects to the side of the cylindrical battery Ba, so that two cylindrical shapes connected to each other are connected. A space that allows ventilation between the batteries Ba is secured, and a sufficient heat dissipation effect can be obtained.
- the connecting portion 3 is connected to the side of the cylindrical battery Ba, it is possible to employ fastening means for the bolts 19 and nuts 13 other than welding, caulking means for rivets, etc. not shown. .
- the welded portion 2 of the inter-battery connection plate 1 when welding the welded portion 2 of the inter-battery connection plate 1 to the sealing plate 14, the welded portion 2 is fitted into a recess formed by the caulking portion 7a of the battery case 7 and the outer surface of the sealing plate 14.
- the outer surface of the stepped portion 4 can be welded in a stable holding state that is positioned in contact with the inner peripheral surface 18a of the insulating ring 18 in a fitted state, the welded portion 2 can be securely attached to the outer surface of the sealing plate 14. Can be welded to each other, and a high weld strength can be obtained without any variation, resulting in a highly robust joint.
- connection part 3 of the inter-battery connection plate 1 is larger than the diameter of the semicircular arc of the weld part 2 and at an interval less than the diameter of the battery case 7.
- the location where the two connecting portions 3 are connected to each other can be set within the range of the diameter of the battery case 7, and as will be described later, a large number of cylindrical batteries Ba can be arranged easily and stably. Multiple stages Thus, the battery module 20 or the battery pack can be easily configured.
- the inter-battery connection plate 1 is formed of a material such as iron, copper, brass or the like that is nickel-finished on at least one surface, or nickel, iron, copper, brass, or the like. Resistance becomes small.
- the bolts 19 and nuts 13 that connect the inter-battery connection plates 1 to each other are preferably made of brass. When using the brass bolts 19 and nuts 13 in combination with the copper inter-battery connection plate 1, the familiarity of both can be optimized and the battery resistance can be made extremely low. Higher output of module 20 or battery pack can be further promoted.
- the inter-battery connection plate 1 after the two cylindrical batteries Ba are connected to each other by screwing the bolt 19 and the nut 13 together is applied by applying far-red paint.
- the inter-battery connection plate 1 is electrically insulated to enhance safety, and a heat dissipation effect is added to the inter-battery connection plate 1 so that the power and heat dissipation are similar to those of the radiating fins. Function.
- FIG. 7 shows a battery pack 27 configured using the inter-battery connection structure of the embodiment.
- This battery pack 27 includes two battery modules 20 having a configuration substantially the same as FIG.
- the cylindrical batteries Ba are connected in series in a state where these two battery modules 20 are stacked in a two-tiered manner so as to face each other.
- This battery pack 27 is used for both serial connection of two cylindrical batteries Ba adjacent in series in the axial direction and serial connection of two cylindrical batteries Ba adjacent in radial arrangement. Since it can be configured using the inter-battery connection plate 1 that can be connected, and all the cylindrical batteries Ba can be connected by one type of inter-battery connection plate 1, a significant cost reduction can be achieved.
- each pair of inter-battery connection plates 1 fixed to both ends of the cylindrical battery Ba has an angle formed by the protruding direction of each connection part 3. It is fixed to the cylindrical battery Ba with the relative arrangement as follows.
- each pair of inter-battery connection plates 1 fixed to both ends of the cylindrical battery Ba is connected in the protruding direction of each connection portion 3 as in FIG.
- the cylinder 3 is set to a relative angle of 180 ° with the protruding direction of the connection 3
- the battery is fixed to Ba.
- FIG. 6 shows a part of another battery pack 28 configured using the inter-battery connection structure of the embodiment.
- This battery pack 28 uses two battery modules 20 having substantially the same configuration as that shown in FIG. 3 in the same manner as in FIG. 7, and each of these two battery modules 20 is stacked in a two-tiered manner.
- the battery cells Ba are connected in series, but the upper and lower battery modules 20 are shifted so that the cylindrical batteries Ba are stacked in a stacking arrangement.
- the pair of inter-battery connection plates 1 fixed to both ends of the rightmost cylindrical battery Ba in the lower battery module 20 has an angle formed by the protruding direction of each connection part 3 of 60 °.
- a pair of inter-battery connection plates 1 fixed to both ends of the rightmost cylindrical battery Ba in the upper battery module 20 are connected to each other. It is fixed to the cylindrical battery Ba in a relative arrangement in which the angle formed by the protruding direction of the part 3 is 120 °.
- inter-battery connection structure of the above embodiment only one type of inter-battery connection plate 1 having the same shape is used, but both electrode terminals of each cylindrical battery Ba are used.
- the battery module is manufactured, by setting the angle formed by the protruding direction from the cylindrical battery Ba of each connection portion 3 of the pair of battery connection plates 1 connected to each other to an arbitrary angle, There is a great advantage that it is possible to easily cope with a configuration in which the cylindrical batteries Ba are arranged in various arrangement forms such as a stacked arrangement and a staggered arrangement.
- two cylindrical batteries are arranged in the axial direction and connected in series by the same inter-battery connection plate, and 2 Since it can be used for both applications in which a single cylindrical battery is connected in series in a radially juxtaposed arrangement, both component costs and manufacturing costs can be reduced, so that battery modules or battery packs can be manufactured at low cost.
- a sufficient heat dissipation effect can be obtained, and two battery connection plates other than welding can be obtained.
- the bolts and nuts can be connected to each other by fastening means, etc., even when connecting large cylindrical batteries, it can be easily connected by reducing the welding process, and the weight of the connecting part increases with the simplification of the configuration.
- Semi-circular arc Nag High robustness that can sufficiently secure the strength when subjected to an impact due to the large joint area between the battery-like welded portion and the battery case.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020077019397A KR101249110B1 (ko) | 2005-04-14 | 2006-03-31 | 전지 간 접속구조 |
EP06730805A EP1883126A4 (en) | 2005-04-14 | 2006-03-31 | PRODUCTION METHOD FOR ELECTRICAL DEVICE ASSEMBLY AND ELECTRIC DEVICE ASSEMBLY |
US11/918,457 US8178234B2 (en) | 2005-04-14 | 2006-03-31 | Cell-to-cell connection structure |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005116373A JP5005183B2 (ja) | 2005-04-14 | 2005-04-14 | 電池間接続構造 |
JP2005-116373 | 2005-04-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006112251A1 true WO2006112251A1 (ja) | 2006-10-26 |
Family
ID=37114979
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2006/306857 WO2006112251A1 (ja) | 2005-04-14 | 2006-03-31 | 電池間接続構造 |
Country Status (6)
Country | Link |
---|---|
US (1) | US8178234B2 (ja) |
EP (1) | EP1883126A4 (ja) |
JP (1) | JP5005183B2 (ja) |
KR (1) | KR101249110B1 (ja) |
CN (1) | CN100590911C (ja) |
WO (1) | WO2006112251A1 (ja) |
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US20080286636A1 (en) * | 2007-05-16 | 2008-11-20 | Sony Corporation | Battery pack |
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CN110970631B (zh) * | 2019-11-13 | 2021-10-01 | 上海空间电源研究所 | 一种热电池用小型化高强度机械对接支脚 |
KR20210113864A (ko) * | 2020-03-09 | 2021-09-17 | 주식회사 엘지에너지솔루션 | 버스바를 구비한 배터리 모듈, 및 배터리 팩, 및 자동차 |
DE102022112233A1 (de) * | 2022-05-16 | 2023-11-16 | Lisa Dräxlmaier GmbH | Batteriezellenanordnung für eine batterie eines kraftfahrzeugs mit einer thermischen isolation zur hemmung von wärmeübertragung durch wärmestrahlung |
CN218586292U (zh) * | 2022-09-30 | 2023-03-07 | 宁德时代新能源科技股份有限公司 | 电池及用电装置 |
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Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1921696A1 (en) * | 2006-11-10 | 2008-05-14 | Hitachi Vehicle Energy, Ltd. | Battery pack and method for welding cells |
EP1928044A1 (en) * | 2006-12-01 | 2008-06-04 | Samsung SDI Co., Ltd. | Connection cap for a rechargeable battery |
US8895181B2 (en) | 2006-12-01 | 2014-11-25 | Samsung Sdi Co., Ltd. | Battery module |
US20080286636A1 (en) * | 2007-05-16 | 2008-11-20 | Sony Corporation | Battery pack |
US9105914B2 (en) * | 2007-05-16 | 2015-08-11 | Sony Corporation | Battery pack including electrode tabs with load absorbing parts |
WO2008147153A1 (en) * | 2007-05-31 | 2008-12-04 | Lg Chem, Ltd. | Electrical connecting member of assembling type and secondary battery pack containing the same |
US8795877B2 (en) | 2007-05-31 | 2014-08-05 | Lg Chem, Ltd. | Electrical connecting member of assembling type and secondary battery pack containing the same |
CN109103408A (zh) * | 2018-07-05 | 2018-12-28 | 湖北锂诺新能源科技有限公司 | 用于动力电池模组上的铝连接片 |
Also Published As
Publication number | Publication date |
---|---|
KR20080003778A (ko) | 2008-01-08 |
JP5005183B2 (ja) | 2012-08-22 |
EP1883126A1 (en) | 2008-01-30 |
EP1883126A4 (en) | 2011-12-28 |
US20090068555A1 (en) | 2009-03-12 |
KR101249110B1 (ko) | 2013-03-29 |
US8178234B2 (en) | 2012-05-15 |
JP2006294524A (ja) | 2006-10-26 |
CN100590911C (zh) | 2010-02-17 |
CN101160676A (zh) | 2008-04-09 |
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