Storage battery device

Abstract

To provide a storage battery device capable of reducing the pressure loss of fluid flowing through a cooling portion.SOLUTION: A cooling portion of a storage battery device includes: a plurality of cooling members thermally connected to a battery pack; one or more connection members connecting the ends on the same side of two adjacent cooling members; and a joint provided with a second flow path. The cooling member is provided with a cooling flow path that is included in the first flow path and penetrates the cooling member in a first direction. The connection member is provided with a connection flow path that is included in the first flow path and connects the cooling flow paths of the two adjacent cooling members. The cooling portion includes at least one of a connection flow path surface that forms the connection flow path and is curved convexly in a direction away from the two adjacent cooling members, and a second flow path surface that forms the first flow path side of the second flow path and is curved such that the diameter increases toward the first flow path.SELECTED DRAWING: Figure 14

Description

[Technical field]

[0001] An embodiment of the present invention relates to a storage battery device. [Background technology]

[0002] Conventionally, a storage battery device is known that includes a battery pack having a plurality of battery cells and a cooling unit that is thermally connected to the battery pack and has an internal flow path through which a fluid that cools the battery pack flows. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2016-39178 A Summary of the Invention [Problem to be solved by the invention]

[0004] In this type of storage battery device, for example, it would be beneficial if the pressure loss of the fluid flowing through the cooling section could be reduced. [Means for solving the problem]

[0005] The storage battery device of the embodiment includes one or more assembled batteries and a cooling unit. The assembled battery includes a plurality of battery cells. The cooling unit is thermally connected to the assembled battery, and includes a first flow path through which a fluid for cooling the assembled battery flows, and a second flow path connected to the first flow path. The cooling unit includes a plurality of cooling members each extending in a first direction, arranged in a second direction intersecting the first direction, and thermally connected to the assembled battery, one or more connecting members connecting the ends of the same side of two adjacent cooling members, and a joint provided with the second flow path. The cooling member includes a cooling flow path that is included in the first flow path and penetrates the cooling member in the first direction. The connecting member includes a connecting flow path that is included in the first flow path and connects the cooling flow paths of the two adjacent cooling members. The cooling section has at least one of a connection flow path surface which forms the connection flow path, is formed in a convex curved shape in a direction away from the two adjacent cooling members, and guides the fluid, and a second flow path surface which forms the first flow path side of the second flow path, is formed in a curved shape whose diameter increases toward the first flow path, and guides the fluid. [Brief description of the drawings]

[0006] [Figure 1] FIG. 1 is a configuration diagram showing a storage battery system according to a first embodiment. [Diagram 2] FIG. 2 is a perspective view showing the storage battery equipment of the first embodiment. [Diagram 3] FIG. 3 is a plan view showing the storage battery equipment of the first embodiment. [Figure 4] FIG. 4 is a perspective view showing the battery pack of the first embodiment. [Diagram 5] FIG. 5 is an exploded perspective view showing the battery pack of the first embodiment. [Figure 6] FIG. 6 is a diagram illustrating a part of the storage battery equipment of the first embodiment. [Figure 7] FIG. 7 is a perspective view showing a cooling unit and a supporting unit of the storage battery equipment of the first embodiment. [Figure 8]FIG. 8 is a plan view showing the cooling section and the support section of the storage battery device of the first embodiment. [Figure 9] FIG. 9 is a bottom view showing the cooling section and the support section of the storage battery device of the first embodiment. [Figure 10] FIG. 10 is a perspective view showing a part of the cooling section and the support section of the storage battery device of the first embodiment. [Figure 11] FIG. 11 is an exploded view showing the cooling member of the cooling unit of the first embodiment. [Figure 12] FIG. 12 is a perspective view showing a joint member of the cooling section of the first embodiment. [Figure 13] FIG. 13 is an exploded perspective view showing a connection member of the cooling unit according to the first embodiment. [Figure 14] FIG. 14 is a perspective view showing a base member of the connection member according to the first embodiment. [Figure 15] FIG. 15 is a diagram showing a mounting mode of the connection member according to the first embodiment. [Figure 16] FIG. 16 is a plan view showing the storage battery equipment of the second embodiment. [Figure 17] FIG. 17 is an exploded perspective view showing the connection member of the second embodiment. [Figure 18] FIG. 18 is a bottom view showing the battery pack of the third embodiment. [Figure 19] FIG. 19 is a plan view showing a storage battery equipment according to the fourth embodiment. [Figure 20] FIG. 20 is an exploded perspective view showing a connection member according to the fourth embodiment. [Figure 21] FIG. 21 is a plan view showing a storage battery equipment according to the fifth embodiment. [Figure 22] FIG. 22 is an exploded plan view showing a connection member according to the fifth embodiment. [Figure 23] FIG. 23 is a plan view showing a base member of a connection member according to the fifth embodiment. [Figure 24] FIG. 24 is a bottom view showing the cover member of the connection member according to the sixth embodiment. [Diagram 25]FIG. 25 is a cross-sectional view showing a cover member of a connection member according to the sixth embodiment. [Figure 26] FIG. 26 is a plan view showing the inside of the connection member of the seventh embodiment. [Figure 27] FIG. 27 is a rear view showing the cooling section of the seventh embodiment. [Figure 28] FIG. 28 is a perspective view showing a storage battery equipment according to an eighth embodiment. [Figure 29] FIG. 29 is a perspective view showing a storage battery equipment according to a ninth embodiment. [Diagram 30] FIG. 30 is a plan view showing a storage battery equipment according to a tenth embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0007] Hereinafter, exemplary embodiments of the present invention will be described. The configurations of the embodiments described below and the actions and effects brought about by the configurations are merely examples.

[0008] In addition, the drawings are schematic, and the dimensional relationships and ratios of each element may differ from reality. Furthermore, the drawings may include parts whose dimensional relationships and ratios differ from one another. In this specification, ordinal numbers are used only to distinguish between parts, members, sites, positions, directions, etc., and do not indicate order or priority.

[0009] <First embodiment> Fig. 1 is a configuration diagram showing a storage battery system according to a first embodiment. The storage battery system 1 shown in Fig. 1 can be mounted on various vehicles such as railroad cars and automobiles, and used as a power source for these various vehicles.

[0010] The storage battery system 1 includes a plurality of storage battery devices 10. The plurality of storage battery devices 10 are arranged, for example, side by side in the vertical direction. The plurality of storage battery devices 10 are electrically connected, for example, in series or in parallel.

[0011] Fig. 2 is a perspective view showing the storage battery device of the first embodiment. Fig. 3 is a plan view showing the storage battery device of the first embodiment. As shown in Figs. 1 to 3, the storage battery device 10 includes a plurality of assembled batteries 100, a cooling section 200 overlapped on the assembled batteries 100, and a support section 300. The assembled batteries 100 and the cooling section 200 are fixed to the support section 300 by male screw members 400 such as bolts. Note that Fig. 3 shows a state in which some of the assembled batteries 100 have been removed.

[0012] As shown in each drawing, for the sake of convenience, an X-axis, a Y-axis, and a Z-axis are defined in this specification. The X-axis, the Y-axis, and the Z-axis are perpendicular to each other. The X-axis is aligned along the short side direction of the battery pack 100. The Y-axis is aligned along the long side direction of the battery pack 100. The Z-axis is aligned along the height of the battery pack 100.

[0013] Furthermore, in this specification, an X direction, a Y direction, and a Z direction are defined. The X direction is a direction along the X axis, and includes a +X direction indicated by an arrow on the X axis, and a -X direction opposite to the arrow on the X axis. The Y direction is a direction along the Y axis, and includes a +Y direction indicated by an arrow on the Y axis, and a -Y direction opposite to the arrow on the Y axis. The Z direction is a direction along the Z axis, and includes a +Z direction indicated by an arrow on the Z axis, and a -Z direction opposite to the arrow on the Z axis. In this embodiment, the +Z direction coincides with the upward vertical direction (the direction of the arrow D1).

[0014] Fig. 4 is a perspective view showing the battery pack of the first embodiment, Fig. 5 is an exploded perspective view showing the battery pack of the first embodiment, Fig. 6 is a diagram showing a part of the storage battery device of the first embodiment.

[0015] As shown in FIGS. 4 to 6, the battery pack 100 includes a housing 101, a plurality of battery cells 102, a plurality of bus bars 103, and a monitoring board 104.

[0016] The housing 101 accommodates a plurality of battery cells 102, a plurality of bus bars 103, and a monitoring board 104 inside. The housing 101 has a housing body 111 and a lid 112 that closes an opening of the housing body 111. The housing 101 is also provided with an inner lid 113 that divides the inside of the housing 101. As shown in Figs. 4 and 6, the housing 101 has fixing portions 114 at its four corners. The fixing portion 114 is provided with a through hole 114a into which a male screw member 400 is inserted, and the fixing portion 114 is fixed to the support portion 300 by the male screw member 400.

[0017] The battery cell 102 is, for example, a lithium ion secondary battery. However, the battery cell 102 may be another secondary battery such as a nickel-metal hydride battery, a nickel-cadmium battery, or a lead-acid battery. As shown in FIG 5, the battery cell 102 has a case 121, a positive terminal 122, a negative terminal 123, and a release valve 124.

[0018] The multiple bus bars 103 electrically connect the multiple battery cells 102. The bus bars 103 electrically connect the positive electrode terminals 122 and negative electrode terminals 123 of the multiple battery cells 102, and the bus bars 18 are joined to the positive electrode terminals 14 and negative electrode terminals 15 by welding or the like. The number of battery cells 102 connected in series and in parallel is determined by the combination of the connections of the positive electrode terminals 14 and negative electrode terminals 15 by the bus bars 18.

[0019] The monitoring board 104 provides electronic conductivity to electronic components such as a voltage sensor that detects the voltage of the battery cells 102 and a temperature sensor that detects the temperature. A circuit pattern formed using copper foil is formed on the surface of the monitoring board 104. The monitoring board 104 is fixed to the bus bar 103 by a number of bolts 131 and washers.

[0020] 1, the battery pack 100 has a positive electrode terminal 141 and a negative electrode terminal 142. In two adjacent battery packs 100, the positive electrode terminal 141 of one battery pack 100 and the negative electrode terminal 142 of the other battery pack 100 are electrically connected by a wire 143.

[0021] Fig. 7 is a perspective view showing the cooling unit and the support unit of the storage battery device of the first embodiment. Fig. 8 is a plan view showing the cooling unit and the support unit of the storage battery device of the first embodiment. Fig. 9 is a bottom view showing the cooling unit and the support unit of the storage battery device of the first embodiment.

[0022] 7 to 9, the support portion 300 has a shelf board 301, a plurality of bases 302, and a plurality of beams 303. The shelf board 301 is made of a high-rigidity steel plate such as SUS, and has a thickness of, for example, about several mm. Note that the shelf board 301 is not limited to the above.

[0023] A plurality of bases 302 and a plurality of beams 303 are fixed in a lattice pattern on a shelf board 301. The plurality of bases 302 each extend in the Y direction and are arranged at intervals in the X direction. The plurality of beams 303 are provided between the plurality of bases 302 and the shelf board 301. The plurality of beams 303 each extend in the X direction and are arranged at intervals in the Y direction. The plurality of bases 302 and the plurality of beams 303 are fixed to the shelf board 301 by male screw members 400. As a result, the shelf board 301 is reinforced by the bases 302 and the beams 303, and deflection of the shelf board 301 is suppressed. In addition, by fixing the battery pack 100 to the shelf board 301 by the male screw members 400 (through bolts), an increase in the number of male screw members 400 can be suppressed, and the weight of the storage battery device 10 can be reduced.

[0024] As shown in FIG. 7 and FIG. 8, the cooling part 200 has a plurality of cooling units 201. As shown in FIG. 2, FIG. 3, and FIG. 6, the cooling part 200 is disposed between the support part 300 and the battery pack 100, and is thermally connected to the battery pack 100. As an example, the cooling part 200 is overlaid on the housing 101 of the battery pack 100 via a flexible heat conductive member 410 (FIG. 6). The heat conductive member 410 is, for example, a silicon sheet having electrical insulation and high thermal conductivity. The heat conductive member 410 can reduce the contact thermal resistance between the cooling part 200 and the battery pack 100. Inside the cooling part 200, a flow path 202 (FIG. 6) is provided through which a fluid that cools the battery pack 100 flows. The fluid is, for example, a cooling liquid such as water. The fluid may be a gas. The cooling part 200 is also called a heat sink.

[0025] 7 and 8, the cooling units 201 are arranged at intervals in the X direction. The cooling units 201 are disposed between two adjacent bases 302. As shown in Fig. 6, the cooling units 201 are sandwiched between the shelf board 301 and the housing 101 of the battery pack 100 fixed to the bases 302 and the shelf board 301 by male screw members 400. That is, the male screw members 400 fix the battery pack 100 and the cooling units 201 (cooling section 200) to the shelf board 301.

[0026] 3 and 7, the cooling unit 201 has two cooling members 203A and 203B, a joint member 204, and a connection member 205. The cooling members 203 are collectively referred to as the cooling members 203A and 203B. The flow path 202 is provided through the cooling member 203, the joint member 204, and the connection member 205. The flow path 202 has a first flow path 202a (FIG. 6) that extends through the cooling member 203, the joint member 204, and the connection member 205, and a second flow path 202b (FIG. 12) that is provided in a joint 204c of the joint member 204.

[0027] FIG. 10 is a perspective view showing a part of the cooling section and the support section of the storage battery device of the first embodiment. As shown in FIG. 3, FIG. 7, and FIG. 10, the two cooling members 203 of each cooling unit 201 each extend in the Y direction (first direction). The cooling members 203 are flat tubes formed in a flat shape with a width in the X direction smaller than the width (height) in the Z direction. The two cooling members 203 are arranged in the X direction (second direction) intersecting (perpendicular to) the Y direction (first direction) and thermally connected to the battery pack 100. That is, the cooling section 200 has a plurality of cooling members 203 (six, for example) arranged in the X direction. In addition, the two cooling members 203A and 203B constitute a cooling member set 210. Therefore, the cooling section 200 has a plurality of cooling member sets 210 (FIG. 7) each including two adjacent cooling members 203 and arranged in the X direction. The cooling member 203 has two ends 203a, 203b in the Y direction. The Y direction is an example of a first direction, and the X direction is an example of a second direction.

[0028] Fig. 11 is an exploded view showing the cooling member of the cooling unit of the first embodiment. As shown in Fig. 11, a plurality of cooling channels 203c are provided inside the cooling member 203. The cooling channels 203c extend in the Y direction and penetrate the cooling member 203 in the Y direction. The cooling channels 203c are included in the first channel 202a.

[0029] 11, the two cooling members 203A and 203B have the same shape and are assembled to each other in a position rotated 180 degrees around the Y axis with respect to the other.

[0030] The cooling member 203 is provided with a projection / recess portion 203d for fitting. The projection / recess portion 203d includes a recess 203e and a projection 203f. The recess 203e is a notch. The projection / recess portions 203d of the two cooling members 203 are fitted together. The cooling member 200 is also provided with a temporary fastening hole 203p (FIG. 10). With the projection / recess portions 203d of the two cooling members 203 fitted together, the two cooling members 203 can be temporarily fastened together by inserting a set screw, a flat head screw, or the like, into the temporary fastening hole 203p. The flatness of the end faces of the ends 203a and 203b of the cooling member 203 is ensured by machining or the like.

[0031] Furthermore, two grooves 203g are provided in each cooling member 203. The grooves 203g are provided at the four corners of the cooling member set 210 when the two cooling members 203 are assembled. The grooves 203g extend in the Y direction.

[0032] The cooling member 203 is an extruded material. That is, the cooling member 203 is produced by extrusion molding, and the cross section perpendicular to the Y direction is constant (the same) regardless of the position in the Y direction. The cooling member 203 is made of, for example, a metal material.

[0033] 3, the joint member 204 is fixed to the end portion 203b of the cooling member 203 by a male screw member 402. The male screw member 402 is coupled to a female screw portion provided in a groove 203g of the cooling member 203. The joint member 204 may be fixed to the cooling member 203 by adhesion.

[0034] Fig. 12 is a perspective view showing a joint member of the cooling unit of the first embodiment. As shown in Fig. 12, the joint member 204 has a fixing portion 204a, two protruding portions 204b, and two joints 204c. The joint member 204 is also provided with two flow paths 204f and two flow paths 204h. The joint member 204 is made of, for example, a synthetic resin material. The joint member 204 is also called a joint resin block.

[0035] The fixing portion 204a is formed in a rectangular plate shape and is overlapped on the end portion 203b of the cooling member 203. At the four corners of the fixing portion 204a, openings 204g are provided that penetrate the fixing portion 204a. The openings 204g may be through holes or notches. A male screw member 402 is inserted into the openings 204g.

[0036] The two protruding parts 204b protrude from the fixing part 204a on the opposite side to the cooling member 203.

[0037] The two joints 204c protrude from the two protruding parts 204b. The joints 204c have a base part 202d connected to the protruding parts 204b and a coupling part 204e (FIG. 10) connected to the base part 202d. A flow path member such as a pipe is coupled to the coupling part 204e.

[0038] The two flow paths 204f penetrate the fixed portion 204a to reach the two protruding portions. The two flow paths 204h penetrate the two joints 204c. The two flow paths 204f are connected to the two flow paths 204h. The two flow paths 204f are also connected to the connection flow paths 205c of the two cooling members 203. The two flow paths 204f are included in the first flow path 202a, and the two flow paths 204h are included in the second flow path 202b.

[0039] 3, the connecting member 205 is fixed to the end portions 203a on the same side of two adjacent cooling members 203 by male screw members 402, and connects the two end portions 203a. The male screw members 402 are coupled to female screw portions provided in grooves 203g of the cooling members 203. The connecting member 205 may be fixed to the cooling members 203 by adhesion. The connecting member 205 is an example of a first connecting member.

[0040] Fig. 13 is an exploded perspective view showing a connection member of the cooling unit of the first embodiment. Fig. 14 is a perspective view showing a base member of the connection member of the first embodiment. Fig. 15 is a view showing an attachment mode of the connection member of the first embodiment.

[0041] 13 to 15, the connection member 205 has a fixed portion 205a and a folded portion 205b. The connection member 205 is also provided with a connection flow path 205c. The connection member 205 is made of, for example, a synthetic resin material. The connection member 205 is also called a U-turn resin block.

[0042] The fixing portion 205a is formed in a rectangular plate shape and is overlapped on the end portion 203a of the cooling member 203. At the four corners of the fixing portion 205a, openings 205g are provided that penetrate the fixing portion 205a. The openings 205g may be through holes or notches. A male screw member 402 is inserted into the openings 205g.

[0043] The folded portion 205b extends from the fixed portion 205a to the opposite side to the cooling member 203.

[0044] The connection flow passage 205c is included in the first flow passage 202a and connects the cooling flow passages 203c of the two adjacent cooling members 203. In detail, the connection flow passage 205c has two open ends 205d and a return flow passage 205e. The connection flow passage 205c can be manufactured by, for example, cutting or injection molding.

[0045] The two open ends 205d pass through the fixed portion 205a and are connected to the cooling flow paths 203c of the cooling members 203 that are different from each other.

[0046] The turn-back flow path 205e is provided in the turn-back portion 205b and connects the two open ends 205d. The turn-back flow path 205e is formed in a U-shaped turn-back shape. That is, at least a part of the turn-back flow path 205e is formed in a curved shape that is convex in a direction away from the two adjacent cooling members 203.

[0047] The inner surface 205f of the connection member 205 includes a connection flow path surface 205fa (FIG. 14) and a connection flow path surface 205fb (FIG. 13). The connection flow path surface 205fa is located on the outer periphery side of the turn-back flow path 205e, and the connection flow path surface 205fb is located on the inner periphery side of the turn-back flow path 205e. The connection flow path surface 205fa and the connection flow path surface 205fb form the turn-back flow path 205e. The connection flow path surfaces 205fa and 205fb are each formed in a curved shape that is convex in a direction (+Y direction) away from the two adjacent cooling members 203. That is, the connection flow path surfaces 205fa and 205fb are formed in a U-shaped curved shape.

[0048] The connection member 205 includes a base member 221 and a lid member 222. The base member 221 includes a fixed portion 205a and a part of the folded portion 205b. The lid member 222 includes a part of the folded portion 205b. The base member 221 is provided with a substantially semicircular fixed surface 221a. The fixed surface 221a has an opening 221b in which a part of the connection flow path 205c is opened. The lid member 222 is formed in a substantially semicircular shape and is fixed to the fixed surface 221a by bonding or the like. The lid member 222 closes the opening 221b. The fixed surface 221a is also referred to as a gluing structure. The lid member may have a convex portion that overlaps the fixed surface 221a. The base member 221 is an example of a first base member, and the lid member 222 is an example of a first lid member.

[0049] In the cooling section 200 having the above configuration, for example, in the cooling unit 201, the fluid flows into the cooling flow passage 203c of the cooling member 203A from one of the two joints 204c. Then, the fluid flows into the cooling flow passage 203c of the cooling member 203B via the connection flow passage 205c of the connection member 205. At this time, the fluid flows along the connection flow passage surface 205fa and the connection flow passage surface 205fb in the connection member 205. Then, the fluid exits from the other of the two joints 204c.

[0050] As described above, in this embodiment, the cooling unit 200 forms the connection flow path 205c, and has the connection flow path surface 205fa and the connection flow path surface 205fb that guide the fluid and are formed in a curved shape that is convex in a direction away from the two adjacent cooling members 203. With this configuration, it is possible to reduce the pressure loss of the fluid flowing through the connection flow path 205c, compared to a case where the connection flow paths are combined at right angles.

[0051] Moreover, the connection member 205 is made of a synthetic resin material. With this configuration, the curved connection flow path surfaces 205fa and 205fb of the connection member 205 can be easily formed compared to when the connection member 205 is made of a metal material.

[0052] Furthermore, the connection member 205 is fixed to the cooling member 203 by male screw members 402. With such a configuration, costs can be reduced more easily than with a configuration in which the connection member 205 is brazed to the cooling member 203. This is because, for example, brazing needs to be performed in a facility dedicated to brazing.

[0053] Moreover, the cooling member 203 is an extruded material. With such a configuration, the length of the cooling member 203 can be easily set to various lengths.

[0054] <Second embodiment> Fig. 16 is a plan view showing a storage battery device according to the second embodiment, and Fig. 17 is an exploded perspective view showing a connection member according to the second embodiment.

[0055] As shown in FIG. 16, this embodiment differs from the first embodiment mainly in that a connecting member 205A is provided instead of the joint member 204 and the connecting member 205.

[0056] 17, the connecting member 205A is different from the connecting member 205 mainly in that it has a joint 204c. The joint 204c protrudes in the +Z direction from the cover member 222. The structure of the joint 204c is similar to that of the joint 204c of the joint member 204.

[0057] As shown in FIG. 16, the joints 204c of a plurality of connection members 205A fixed to the end portion 203a of the cooling member 203 are connected to each other by a pipe 245.

[0058] <Third embodiment> FIG. 18 is a bottom view showing the battery pack of the third embodiment.

[0059] 18, this embodiment differs from the second embodiment mainly in the mounting posture of the connection member 205A. In this embodiment, the connection member 205A is mounted so that the joint 204c protrudes from the cover member 222 in the -Z direction.

[0060] <Fourth embodiment> Fig. 19 is a plan view showing a storage battery device according to a fourth embodiment, and Fig. 20 is an exploded perspective view showing a connection member according to the fourth embodiment.

[0061] As shown in FIG. 19, this embodiment differs from the second embodiment mainly in that a connection member 205B is provided instead of the connection member 205A.

[0062] As shown in FIG. 20, connecting member 205B differs from connecting member 205A mainly in that joint 204c protrudes from base member 221 of cover member 222 in the Y direction.

[0063] As shown in FIG. 19, the joints 204c of the multiple connection members 205B fixed to the end portion 203a of the cooling member 203 are connected to each other by piping 245.

[0064] <Fifth embodiment> Fig. 21 is a plan view showing a storage battery device of a fifth embodiment, Fig. 22 is an exploded plan view showing a connection member of the fifth embodiment, and Fig. 23 is a plan view showing a base member of the connection member of the fifth embodiment.

[0065] As shown in FIG. 21, this embodiment differs from the second embodiment mainly in that a connection member 205C is provided at an end 203b of a cooling member 203 instead of the connection member 205B.

[0066] The connecting member 205C connects the other end 203b of one connecting member 205 in one of two adjacent cooling member groups 210 to the other end 203b of each of the two connecting members 205 in the other cooling member group 210 of the two adjacent cooling member groups 210.

[0067] 22 and 23, the connection member 205C has two fixing parts 205a and a folded part 205b. The connection member 205C is also provided with a connection flow path 205c. The connection member 205C is made of, for example, a synthetic resin material. The connection member 205C is also called a U-turn resin block.

[0068] The fixing portion 205a is formed in a rectangular plate shape and is overlapped on the end portion 203b of the cooling member 203. As an example, the fixing portion 205a is overlapped on the end portion 203b of the cooling member 203 via a gasket 260 (FIG. 6). Openings 205g penetrating the fixing portion 205a are provided at the four corners of the fixing portion 205a. The openings 205g may be through holes or notches. A male screw member 402 is inserted into the openings 205g.

[0069] The folded portion 205b extends from the fixed portion 205a to the opposite side to the cooling member 203.

[0070] The connection flow passage 205c is included in the first flow passage 202a, and connects the cooling flow passages 203c of two adjacent cooling members 203. In detail, the connection flow passage 205c has two open ends 205d and a return flow passage 205e.

[0071] The two open ends 205d pass through the two fixed portions 205a and are connected to the cooling flow paths 203c of the cooling members 203 that are different from each other.

[0072] The turn-back flow path 205e is provided in the turn-back portion 205b and connects the two open ends 205d. The turn-back flow path 205e is formed in a U-shaped turn-back shape. That is, at least a part of the turn-back flow path 205e is formed in a curved shape that is convex in a direction away from the two adjacent cooling members 203.

[0073] The inner surface 205f of the connection member 205 includes a connection flow path surface 205fa and a connection flow path surface 205fb. The connection flow path surface 205fa is located on the outer periphery side of the turn-back flow path 205e, and the connection flow path surface 205fb is located on the inner periphery side of the turn-back flow path 205e. The connection flow path surface 205fa and the connection flow path surface 205fb form the turn-back flow path 205e. The connection flow path surfaces 205fa and 205fb are each formed in a curved shape that is convex in a direction (-Y direction) away from the two adjacent cooling members 203. That is, the connection flow path surfaces 205fa and 205fb are formed in a U-shaped curved shape.

[0074] Moreover, the connection member 205C has a base member 221 and a lid member 222. The base member 221 includes a fixed portion 205a and a part of the folded portion 205b. The lid member 222 includes a part of the folded portion 205b. The base member 221 is provided with a fixed surface 221a. The fixed surface 221a is formed with an opening 221b where a part of the connection flow path 205c is open. The lid member 222 is fixed to the fixed surface 221a by bonding or the like. The bonding may be performed by, for example, double-sided tape, adhesive, or the like. The lid member 222 closes the opening 221b.

[0075] In the above configuration, for example, a fluid is introduced into the joint 204c of the connection member 205A of the central cooling unit 201 among the multiple cooling units 201. The fluid is diverted from the joint 204c to the cooling members 203A and 203B of the central cooling unit 201. The fluid that has passed through the cooling member 203A of the central cooling unit 201 flows through the cooling members 203A and 203B of the cooling unit 201 on the -X direction side via the connection member 205C on the -X direction side of the two connection members 205C, and exits from the joint 204c of the connection member 205A on the -X direction side. The arrows in FIG. 21 indicate the flow direction of the fluid.

[0076] On the other hand, the fluid that has passed through cooling member 203B of the middle cooling unit 201 flows through cooling members 203A, 203B of the cooling unit 201 on the +X direction side via connecting member 205C on the +X direction side of the two connecting members 205C, and exits from fitting 204c of connecting member 205A on the +X direction side.

[0077] Sixth embodiment Fig. 24 is a bottom view showing the cover member of the connection member of the sixth embodiment, and Fig. 25 is a cross-sectional view showing the cover member of the connection member of the sixth embodiment.

[0078] 24 and 25, this embodiment is different from the second embodiment mainly in that a connecting member 205D is provided instead of the connecting member 205A. The connecting member 205D has a second flow path surface 205m. The second flow path surface 205m forms the first flow path 202a side of the second flow path 202b, and is formed in a curved shape whose diameter increases toward the first flow path 202a to guide the fluid.

[0079] According to such a configuration, the pressure loss of the fluid flowing through the second flow path 202b can be reduced, compared to a case where the plane that defines the second flow path 202b and the first flow path 202a is at a right angle.

[0080] The second flow path surface 205m may be provided for the second flow path 202b of other embodiments. At least one of the connecting flow path surfaces 205fa, 205fb and the second flow path surface 205m may be provided.

[0081] <Seventh embodiment> Fig. 26 is a plan view showing the inside of the connection member of the seventh embodiment, and Fig. 27 is a rear view showing the cooling part of the seventh embodiment.

[0082] 26, the present embodiment differs from the first embodiment mainly in that a connecting member 205E is provided instead of the connecting member 205. The connecting member 205E differs from the connecting member 205 in that a guide portion 250 is provided. The guide portion 250 is provided in the connecting flow path 205c, and is formed in a curved shape along the connecting flow path surfaces 205fa and 205fb.

[0083] The guide portion 250 guides the fluid. By providing the guide portion 250, stagnation of the fluid in the connection flow path 205c is suppressed.

[0084] 27, fixing portion 205a of connection member 205E is fixed to end 203a of cooling member 203 by male screw members 402 at the four corners and between two opening ends 205d. Also, folded-back portion 205b is provided with groove portion 205n aligned in the Y direction with male screw members 402 between two opening ends 205d. This allows connection member 205E to be more firmly fixed to cooling member 203, and the rigidity of cooling section 200 can be improved.

[0085] <Eighth embodiment> FIG. 28 is a perspective view showing a storage battery equipment according to an eighth embodiment.

[0086] 28, the present embodiment is different from the first embodiment mainly in that the storage battery device 10 is installed so that the longitudinal direction (Y direction) of the battery pack 100 is aligned along the vertical direction. In detail, the storage battery device 10 is set so that the connection members 205 are positioned above the joint members 204 in the vertical direction.

[0087] <Ninth embodiment> FIG. 29 is a perspective view showing a storage battery equipment according to a ninth embodiment.

[0088] 29, the present embodiment is different from the first embodiment mainly in that the storage battery device 10 is installed so that the longitudinal direction (Y direction) of the battery pack 100 is aligned along the vertical direction. In detail, the storage battery device 10 is set so that the connection members 205 are positioned below the joint members 204 in the vertical direction.

[0089] <Tenth embodiment> FIG. 30 is a plan view showing a storage battery equipment according to a tenth embodiment. This embodiment differs from the fifth embodiment mainly in that a connection member 205B is provided instead of the connection member 205A.

[0090] Although the embodiment of the present invention has been illustrated above, the embodiment is merely an example and is not intended to limit the scope of the invention. The embodiment can be implemented in various other forms, and various omissions, substitutions, combinations, and modifications can be made without departing from the gist of the invention. The embodiment is included in the scope and gist of the invention, and is included in the scope of the invention and its equivalents described in the claims. The present invention can be realized by configurations other than those disclosed in the embodiment, and various effects (including derivative effects) obtained by the basic configuration (technical features) can be obtained. In addition, the specifications of each component (structure, type, direction, shape, size, length, width, thickness, height, number, arrangement, position, material, etc.) can be appropriately changed and implemented. [Explanation of symbols]

[0091] 10...storage battery device, 100...battery assembly, 102...battery cell, 200...cooling section, 202a...first flow path, 202b...second flow path, 203...cooling member, 203a, 203b...ends, 203c...cooling flow path, 204...joint member, 204c...joint, 205, 205A-205E...connecting members, 205a...fixing section, 205b...folded-back section, 205c...connecting flow path, 205d...opening end, 205e...folded-back flow path, 205fa, 205fb...connecting flow path surface, 205m...second flow path surface, 205n...groove portion, 210...cooling member assembly, 221...base member, 222...cover member, 250...guide portion, 300...support portion, 400, 402...male screw members.

Claims

1. One or more assembled batteries having a plurality of battery cells; a cooling unit that is thermally connected to the battery pack and has a first flow path therein through which a fluid that cools the battery pack flows and a second flow path connected to the first flow path; Equipped with The cooling unit includes: a plurality of cooling members each extending in a first direction, arranged in a second direction intersecting the first direction, and thermally connected to the battery pack; One or more connection members connecting end portions of the cooling members on the same side of each of two adjacent cooling members; a joint provided with the second flow passage; having the cooling member is provided with a cooling flow passage that is included in the first flow passage and passes through the cooling member in the first direction; the connecting member is provided with a connecting flow path that is included in the first flow path and connects the cooling flow paths of two adjacent cooling members; The cooling unit has at least one of a connection flow path surface that forms the connection flow path, is curved convexly in a direction away from the two adjacent cooling members, and guides the fluid, and a second flow path surface that forms the first flow path side of the second flow path, is curved so that a diameter thereof increases toward the first flow path, and guides the fluid. Battery storage device.

2. The cooling portion has the connecting flow path surface. The storage battery device according to claim 1 .

3. The cooling portion has the second flow path surface. The storage battery device according to claim 1 .

4. The two adjacent cooling members and the connecting member are fixed by male screw members or adhesive. The storage battery device according to claim 1 .

5. The connecting member is made of a synthetic resin material. The storage battery device according to claim 1 .

6. The cooling member is an extruded material. The storage battery device according to claim 1 .

7. The cooling member is provided with an uneven portion, The two adjacent cooling members are fitted with each other at their respective concave and convex portions. The storage battery device according to claim 1 .

8. a first connecting member including a first base member in which the connection flow path is formed and in which a part of the connection flow path is opened, and a first cover member that closes the opening of the connection flow path and is fixed to the first base member; a second connecting member including a second base member in which the connecting flow path and the second flow path are formed and in which a part of the connecting flow path is opened, and a first cover member that closes the opening of the connecting flow path and is fixed to the second base member; The storage battery device according to claim 1 .

9. a plurality of cooling member sets each including two adjacent cooling members and arranged in the second direction; a plurality of first connection members that connect one end of each of the two cooling members of the cooling member set on the same side and in which the second flow passage is formed; a second connecting member that connects the other end of one of the connecting members in one of the two adjacent cooling member sets to the other end of each of the two connecting members in the other of the two adjacent cooling member sets; Equipped with The storage battery device according to claim 1 .

10. A guide portion is provided in the connection flow path and formed in a curved shape along the connection flow path surface. The storage battery device according to claim 1 .

11. The connection flow passage has two open ends connected to different cooling flow passages, and a return flow passage connecting the two open ends, the connecting member has a rectangular plate-shaped fixing portion provided with the two open ends and overlapped on the end of the cooling member, and a turning portion extending from the fixing portion to an opposite side to the cooling member and in which the turning flow path is formed, the fixing portion is fixed to the end of the cooling member by male screw members at four corners and between the two open ends, The folded portion is provided with a groove portion aligned with the male screw members of the two opening ends in the first direction and extending in the first direction. The storage battery device according to claim 1 .

12. A plurality of battery packs arranged in a vertical direction; a support portion to which the plurality of assembled batteries and the cooling portion, the first direction being aligned along a vertical direction, are fixed; The storage battery device according to claim 1 .

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