Battery unit, power storage device, and vehicle

Abstract

To provide a battery unit, a power storage device, and a vehicle in which the number of parts is reduced and rigidity and strength are further improved.SOLUTION: A battery unit includes a frame having a cylindrical shape with an inner space serving as a cooling passage through which a coolant circulates in one direction, and having a plurality of insertion holes penetrating the inside and outside of the cylindrical shape, and a plurality of battery modules provided corresponding to the insertion holes, and each of the battery modules includes a battery module body provided on the outer peripheral surface of the frame, and a plurality of cooling fins that are integrally provided on the battery module body, are positioned in the cooling passage by being fitted into the insertion hole, and extend in one direction.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present disclosure relates to a battery unit, a power storage device, and a vehicle. [Background technology]

[0002] In recent years, vehicles equipped with power storage devices such as lithium-ion batteries have been put into practical use. In particular, there are an increasing number of cases where this type of power storage device is used as a power source for an electric motor. In this case, a large-capacity power storage device is required, and there is a concern that the heat generated by the power storage device will increase. In response to this, for example, a configuration described in Patent Document 1 below has been proposed. In the device according to Patent Document 1 below, a power storage element is covered by a frame having an opening, and an air passage connector is provided between adjacent frames to connect the openings. It is said that a cooling effect is obtained by sending a refrigerant into the frame, so that the refrigerant flows around the outside of the power storage element. In addition, in this type of power storage device, condensation may occur on the surface of the battery cells as they operate. Furthermore, condensation may occur on the surface of the battery cells due to temperature changes during storage. As a measure to prevent such condensation, the following Patent Document 2 discloses a configuration in which at least a portion of the battery cells is covered with a condensation prevention sheet. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6238106 [Patent Document 2] Patent No. 6157460 Summary of the Invention [Problem to be solved by the invention]

[0004] However, when using a frame and an air passage connector as described above, the number of parts increases, which may lead to higher manufacturing and maintenance costs. Furthermore, when mounting an electricity storage device on a vehicle, it is necessary to ensure the rigidity and strength of each part in order to improve resistance to shock and vibration. In that case, the number of parts to compensate for the rigidity and strength tends to increase. Furthermore, there is a possibility that simply covering the battery cells with a dew prevention sheet as in the above-mentioned Patent Document 2 may not be enough to prevent the occurrence of dew condensation.

[0005] The present disclosure has been made to solve the above-mentioned problems, and aims to provide a battery unit, an energy storage device, and a vehicle with a reduced number of parts and improved rigidity, strength, and condensation resistance. [Means for solving the problem]

[0006] In order to solve the above problems, the battery unit of the present disclosure comprises a cylindrical frame having an inner space that serves as a cooling passage through which a refrigerant flows in one direction, and a plurality of insertion holes that penetrate the inside and outside of the cylindrical frame, and a plurality of battery modules provided to correspond to the insertion holes, each of the battery modules having a battery module main body provided on the outer peripheral surface of the frame, and a plurality of cooling fins that are integral with the battery module main body, are fitted into the insertion holes, and are positioned within the cooling passage, and extend in the one direction. Effect of the Invention

[0007] According to the present disclosure, it is possible to provide a battery unit, a power storage device, and a vehicle with a reduced number of parts and further improved rigidity, strength, and condensation resistance. [Brief description of the drawings]

[0008] [Figure 1] 1 is a side view illustrating an example of a vehicle according to an embodiment of the present disclosure. [Diagram 2] 1 is a perspective view showing a configuration of an electricity storage device according to an embodiment of the present disclosure. [Diagram 3]1 is a plan view perspective view showing a configuration of an electricity storage device according to an embodiment of the present disclosure. [Figure 4] FIG. 2 is a perspective view showing a configuration of a battery unit according to an embodiment of the present disclosure. [Diagram 5] 5 is a cross-sectional view taken along line VV in FIG. 4. [Figure 6] FIG. 13 is a perspective view showing a modified example of a battery unit according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, a vehicle 100 and a power storage device 90 according to an embodiment of the present disclosure will be described with reference to FIGS. (Vehicle configuration) The vehicle 100 according to this embodiment is a transport machine used mainly for moving on rough ground. As an example, as shown in Fig. 1, the vehicle 100 includes a vehicle body 1, a drive mechanism 2, and a power storage device 90. (Note that it is also possible to apply, as the vehicle 100, off-road special purpose vehicles including wheeled vehicles and heavy wheeled vehicles equipped with wheels instead of the drive mechanism 2 described below.)

[0010] The vehicle body 1 has a chassis 1A in which passengers, luggage, an engine, a transmission, etc. are accommodated, and a plurality of wheels provided on both sides in the width direction of the chassis 1A. More specifically, one drive wheel 11, one idler wheel 12, a plurality (five as an example) of lower rollers 13A, and a plurality (five as an example) of upper rollers 13B are provided. The drive wheel 11 is attached to the end of the front side of the chassis 1A (it is also possible to adopt a configuration in which the drive wheel 11 is provided on the rear side of the chassis 1A). The drive wheel 11 has a plurality of teeth that engage with the crawler 3 described later. The drive wheel 11 and the crawler 3 constitute a drive mechanism 2. The drive wheel 11 is driven to rotate around a rotation axis extending in the width direction of the vehicle 100 by power transmitted from the engine. In the following description, the width direction of the vehicle 100 is simply called the "width direction".

[0011] Idler wheel 12 is provided at the end of car casing 1A opposite to drive wheel 11. Idler wheel 12 is rotatable about an axis of rotation extending in the width direction. In other words, no power is applied to idler wheel 12. Lower roller 13A is provided at the bottom of car casing 1A and is rotatable about an axis of rotation extending in the width direction while supporting the load of car body 1. Upper roller 13B is provided above lower roller 13A, between drive wheel 11 and idler wheel 12, to prevent crawler 3 from sagging.

[0012] (Drive mechanism configuration) The crawler 3 as an endless track is wound around the drive wheel 11, idler wheel 12, lower roller 13A, and upper roller 13B from the outside. More specifically, the crawler 3 extends from the drive wheel 11 through the upper roller 13B toward the idler wheel 12, and also extends from the idler wheel 12 through the lower roller 13A to the drive wheel 11. In the following explanation, the direction in which the crawler 3 extends is referred to as the "winding direction."

[0013] The crawler 3 has a plurality of track plates 3B formed mainly from iron. A driving force is applied to the crawler 3 by rotating the drive wheel 11 with the claws of the drive wheel 11 engaged with the crawler 3. In other words, the crawler 3 rolls toward one side in the winding direction. The drive system of the crawler 3 is not limited to the above, and it is also possible to adopt a system in which the crawler 3 is driven by the lower roller 13A or the upper roller 13B, for example. It is also possible to adopt a configuration that does not include the idler wheel 12.

[0014] As an example, the crawler 3 is divided into multiple parts at a midway point in the winding direction. In other words, a plurality of units having a certain unit length are connected to form the annular crawler 3. Note that the annular crawler 3 may be formed by connecting both ends of one continuous unit.

[0015] (Configuration of the Power Storage Device) Next, the configuration of the electricity storage device 90 will be described with reference to Figures 2 to 5. The electricity storage device 90 is mounted inside the vehicle body 1 and used as a power source for auxiliary equipment and a power unit. As shown in Figures 2 and 3, the electricity storage device 90 includes a plurality of battery units 80 (two, for example), an elastic connection portion 70, a case 50, a fan portion 60, and a duct portion 61.

[0016] (Battery unit configuration) 4, a battery unit 80 has a frame 81, a plurality of battery modules 82 fixed to this frame 81, and a pressing member 83. The frame 81 is provided for the purposes of cooling (supplying a refrigerant) the battery modules 82 and ensuring the rigidity and strength of the battery unit 80 itself.

[0017] The frame 81 is made of a metal material such as aluminum, and has a cylindrical shape with a rectangular cross section whose longitudinal direction is the up-down direction. The space inside the frame 81 is a cooling passage F through which a refrigerant (air) can flow in one direction. In the following description, the direction in which the frame 81 extends is called the main direction Dm. As shown in FIG. 5, the side surface of the frame 81 (that is, the side surface when viewed from the main direction Dm) is formed with mounting holes H. A plurality of mounting holes H (three on each side, for example) are formed on each side surface of the frame 81 at intervals in the main direction Dm. In other words, the insertion holes H are arranged in the main direction Dm and are arranged to face each other across the cooling passage F. The battery modules 82 are fitted into the insertion holes H. Therefore, in this embodiment, a total of six battery modules 82 are provided in the battery unit 80.

[0018] As shown in FIG. 5, the battery module 82 has a battery module body 82A that houses the power storage element, and a heat sink 84 attached to the battery module body 82A. The heat sink 84 has a plate-shaped heat sink body 84A that contacts the battery module body 82A, and a plurality of cooling fins 84B that protrude from the heat sink body 84A. When the battery module 82 is fitted into the mounting hole H, the plurality of cooling fins 84B are arranged at intervals in the vertical direction. Also, each cooling fin 84B has a plate shape extending in the main direction Dm. The positions of the cooling fins 84B in the vertical direction are different between the heat sinks 84 that face each other via the frame 81. That is, the cooling fins 84B are arranged to be shifted from each other in the vertical direction. (It is also possible to adopt a configuration in which the positions of the cooling fins 84B facing each other in the vertical direction are the same.)

[0019] 4 again, three battery modules 82 located on each side of frame 81 are fixed to frame 81 by pressing members 83 so as not to fall off. More specifically, pressing member 83 is in the shape of a band surrounding the three battery modules 82 from the outer periphery, and both ends are fixed to the side of frame 81. (Note that it is also possible to adopt a configuration in which pressing member 83 surrounds only one battery module 82.)

[0020] (Structure of Elastic Connection Part) The electricity storage device 90 has a plurality of battery units 80 (two, for example) configured as described above. The two battery units 80 are arranged at an interval in the main direction Dm. The elastic connection part 70 connects the ends of the frames 81 of the respective battery units 80 in the main direction Dm. The elastic connection part 70 is formed of an elastically deformable resin material, such as rubber or polyvinyl chloride. The elastic connection part 70 is cylindrical in shape to correspond to the shape of the frame 81. Therefore, the cooling passages F in the pair of frames 81 communicate with each other via the elastic connection part 70.

[0021] (Case configuration) As shown in FIG. 1 or FIG. 2, the case 50 covers the battery unit 80 from the outside. The case 50 is preferably integrally molded from a light metal such as resin or aluminum. A fan unit 60 is provided on each end surface of the case 50 in the main direction Dm. The fan unit 60 is provided to pump external air toward the inside of the case 50 (cooling passage F) or to exhaust air inside the case 50 (cooling passage F) to the outside. The fan unit 60 has a plurality of fan bodies 60A (four, for example). The fan body 60A rotates an impeller by an electric motor to circulate air inside and outside the case 50. The four fan bodies 60A are arranged in a lattice pattern. It is preferable that the fan unit 60 on one side in the main direction Dm is configured to pump air toward the inside of the case 50 (cooling passage F), and the fan unit 60 on the other side is configured to exhaust air. Note that the pair of fan units 60 may be configured to suck in or exhaust air together.

[0022] As shown in Fig. 3, a duct portion 61 is provided between the fan portion 60 and an end of the frame 81 (cooling passage F) in the case 50. The duct portion 61 guides the external air pressurized by the fan portion 60 toward the inside of the cooling passage F. The flow path cross-sectional area of ​​the duct portion 61 gradually decreases from the fan portion 60 toward the cooling passage F. Therefore, when air flows from the fan portion 60 through the duct portion 61 into the cooling passage F, the flow rate of the air increases. On the other hand, when the air is discharged from the cooling passage F, the flow rate decreases as it passes through the duct portion 61.

[0023] (Action and effect) Conventionally, when constructing the power storage device 90, it has been common to cover the battery module 82 only with the case 50, and use the case 50 as a strength member. In addition, it has been necessary to provide a separate device for cooling the battery module 82 inside the case 50. However, in this case, the number of parts increases, and there is a risk of an increase in manufacturing costs and maintenance costs. Furthermore, when mounting the power storage device 90 on the vehicle 100, it is necessary to ensure that each part has a rigidity and strength greater than usual in order to improve shock resistance and vibration resistance. In this case, too, there is a tendency for the number of parts to increase in rigidity and strength.

[0024] Therefore, in this embodiment, as described above, the frame 81 is provided with strength and rigidity, and a cooling passage F is formed within the frame 81. Furthermore, the cooling fins 84B of the battery module 82 are fitted into the insertion holes H formed in the frame 81. As a result, the cooling fins 84B are exposed to the cooling passage F within the frame 81. The cooling fins 84B are contacted with the outside air, which is compressed and sent by the fan unit 60 on one side in the main direction Dm, as a refrigerant. As a result, the refrigerant (air) can take away heat from the battery module main body 82A via the cooling fins 84B, thereby cooling the battery module main body 82A. The air used for cooling is discharged to the outside of the case 50 by the fan unit 60 on the other side through the cooling passage F. As a result, the battery module 82 can be continuously and stably cooled.

[0025] Furthermore, since the frame 81 itself mainly bears the rigidity and strength of the battery unit 80, the frame 81 functions both as a component that forms the cooling passage F and as a strength member. This eliminates the need to prepare a separate strength member, making it possible to reduce the number of components in the entire device. As a result, manufacturing costs and maintenance costs can be significantly reduced.

[0026] Furthermore, according to the above configuration, the battery modules 82 are firmly fixed to the frame 81 by the pressing members 83. This makes it possible to prevent the battery modules 82 from falling off or becoming displaced. In other words, by bringing the battery modules 82 into close contact with the frame 81 by the pressing members 83, the rigidity load imposed by the frame 81 can be further increased, and the strength of the entire electricity storage device 90 can be further improved.

[0027] Additionally, in the above configuration, the multiple insertion holes H are aligned in the main direction Dm and are disposed so as to face each other across the cooling passage F. With this configuration, the multiple battery modules 82 can be efficiently cooled through the multiple insertion holes H. Furthermore, the multiple battery modules 82 are disposed so as to face each other across the cooling passage F (frame 81). This allows the frame 81 to function like a backbone, and it is possible to further increase the strength and rigidity compared to, for example, a configuration in which the multiple battery modules 82 are covered from the outside by other strength members (exoskeleton).

[0028] In addition, according to the above configuration, the cooling fins 84B arranged opposite to each other are vertically offset from each other, so that the flow passage area of ​​the coolant is secured and pressure loss is reduced, thereby making it possible to more efficiently cool the battery modules 82.

[0029] In addition, according to the above configuration, the ends of a pair of adjacent frames 81 are connected to each other by the elastic connecting parts 70. As a result, when an external force is applied to the frames 81, the elastic connecting parts 70 are preferentially elastically deformed by the external force. As a result, the frames 81 themselves are less susceptible to the effects of the external force, and the battery modules 82 can be protected from the external force. This makes it possible to further increase the durability of the electricity storage device 90.

[0030] Furthermore, according to the above configuration, since the flow passage cross-sectional area of ​​the duct portion 61 gradually decreases, the flow speed of the refrigerant can be increased from the fan portion 60 to the cooling passage F. This allows a larger amount of refrigerant to be supplied to the cooling fins 84B per unit time. As a result, the cooling effect of the refrigerant can be further improved. In addition, since the refrigerant flows through the cooling passage F at such a high speed, the possibility of condensation occurring on the surface of the battery module 82 can be reduced.

[0031] (Other embodiments) The above describes the embodiment of the present disclosure. Various changes and modifications can be made to the above configuration without departing from the gist of the present disclosure. For example, in the above embodiment, the description of the layout of the wiring (harness) extending from the battery module 82 is omitted. However, as shown in FIG. 6, it is possible to adopt a configuration in which the harnesses 41 extending from each battery module 82 are aggregated by an aggregation member 40 provided on the upper surface of the frame 81. According to the above configuration, by aggregating the harnesses 41 on the upper surface of the frame 81, the number of parts required for wiring can be reduced compared to, for example, the case in which the harnesses 41 are individually routed from each battery module 82. In addition, by aggregating the harnesses 41, it is also possible to further reduce the size of the entire device.

[0032] In the above embodiment, an example was described in which three battery modules 82 are provided on each side of the frame 81, for a total of six battery modules 82. However, the number of battery modules 82 is not limited by the above embodiment, and can be changed as appropriate according to the design and specifications. Furthermore, in the above embodiment, an example was described in which the battery modules 82 are provided only on two opposing side surfaces of the frame 81. However, as another example, it is also possible to adopt a configuration in which the battery modules 82 are attached to the frame 81 from three or more directions. Specifically, an example is considered in which the frame 81 is formed into a cylindrical shape, and the battery modules 82 are attached to the frame 81 from four directions. With such a configuration, the same effects as those of the above embodiment can be obtained.

[0033] <Additional Notes> The battery unit 80, the power storage device 90, and the vehicle 100 described in each embodiment can be understood, for example, as follows.

[0034] (1) A battery unit 80 in a first embodiment includes a frame 81 having a cylindrical shape with an inner space serving as a cooling passage F through which a refrigerant flows in one direction, and in which a plurality of insertion holes H are formed penetrating the inside and outside of the cylinder, and a plurality of battery modules 82 provided to correspond to the insertion holes H, each of the battery modules 82 having a battery module main body 82A provided on the outer circumferential surface of the frame 81, and a plurality of cooling fins 84B provided integrally with the battery module main body 82A, fitted into the insertion holes H and thereby positioned within the cooling passage F, and extending in the one direction.

[0035] According to the above configuration, the cooling fins 84B of the battery module 82 are fitted into the insertion holes H formed in the frame 81. This exposes the cooling fins 84B to the cooling passages F in the frame 81. This allows the coolant to remove heat from the battery module main body 82A via the cooling fins 84B, thereby cooling the battery module main body 82A. Furthermore, since the frame 81 itself bears the rigidity and strength of the battery unit 80, the frame 81 serves both as a component that forms the cooling passages F and as a strength member. This eliminates the need to provide a separate strength member, making it possible to reduce the number of components in the entire device.

[0036] (2) The battery unit 80 according to the second embodiment further includes a pressing member 83 that surrounds the outer periphery of the battery module 82 and has both ends fixed to the frame 81.

[0037] According to the above-described configuration, the battery module 82 is firmly fixed to the frame 81 by the pressing member 83. This makes it possible to prevent the battery module 82 from falling off or becoming displaced.

[0038] (3) In the battery unit 80 according to the third aspect, the multiple insertion holes H are aligned in the one direction and are disposed opposite each other with the cooling passage F therebetween.

[0039] According to the above configuration, the multiple battery modules 82 can be efficiently cooled through the multiple insertion holes H. Furthermore, the multiple battery modules 82 are arranged facing each other with the cooling passage F (frame 81) in between. This can further increase strength and rigidity compared to a configuration in which the multiple battery modules 82 are covered from the outside, for example.

[0040] (4) In the battery unit 80 according to the fourth aspect, the cooling fins 84B fitted into a pair of the insertion holes H that face each other across the cooling passage F are arranged with a vertical shift.

[0041] According to the above configuration, the cooling fins 84B disposed opposite each other are vertically offset from each other, so that the flow path area of ​​the coolant is secured, and the battery modules 82 can be cooled more efficiently.

[0042] (5) A battery unit 80 according to a fifth aspect further includes an aggregation member 40 that is provided on the upper surface of the frame 81 and aggregates the harnesses 41 extending from the battery modules 82 .

[0043] According to the above configuration, by consolidating the harnesses 41 on the upper surface of the frame 81, it is possible to reduce the number of parts required for wiring, compared to a case in which the harnesses 41 are routed individually from each battery module 82, for example.

[0044] (6) The sixth aspect of the energy storage device 90 includes a plurality of battery units 80 arranged in the same direction, and further includes an elastic connection portion 70 that connects the ends of a pair of adjacent frames 81 and is formed from an elastically deformable material.

[0045] According to the above configuration, the ends of a pair of adjacent frames 81 are connected to each other by the elastic connecting parts 70. As a result, when an external force is applied to the frames 81, the elastic connecting parts 70 are preferentially elastically deformed by the external force. As a result, the frames 81 themselves are less susceptible to the effects of the external force, and the durability of the electricity storage device 90 can be further improved.

[0046] (7) The seventh aspect of the energy storage device 90 further includes a fan section 60 that pumps refrigerant to the cooling passage F, and a duct section 61 that connects the fan section 60 to an end of the cooling passage F and has a flow path cross-sectional area that gradually decreases from the fan section 60 toward the cooling passage F.

[0047] According to the above configuration, since the flow passage cross-sectional area of ​​the duct portion 61 gradually decreases, the flow speed of the refrigerant can be increased from the fan portion 60 to the cooling passage F. This can further improve the cooling effect of the refrigerant.

[0048] (8) A vehicle 100 according to an eighth embodiment includes a power storage device 90.

[0049] According to the above configuration, the vehicle 100 can be operated more stably. [Explanation of symbols]

[0050] 100 vehicles 90 Energy storage device 1. Vehicle body 1A car casing 2. Driving mechanism 3. Crawler 11 Sprocket 12 Guide wheel 13A Lower Wheel 13B Upper roller 40 Aggregate materials 41 Harness 50 cases 60 Fan Club 60A fan body 61 Duct section 70 Elastic joint 80 Battery unit 81 Frames 82 Battery Module 83 Holding member 84 Heatsink 84A Heat sink body 84B Cooling fins F cooling passage H Mounting hole

Claims

1. a frame having a cylindrical shape with an inner space serving as a cooling passage through which a coolant flows in one direction, the frame having a plurality of insertion holes penetrating the cylindrical shape from inside to outside; a plurality of battery modules provided corresponding to the insertion holes; Equipped with Each of the battery modules includes: a battery module body provided on an outer peripheral surface of the frame; a plurality of cooling fins that are integrally provided on the battery module body, that are fitted into the insertion holes to be positioned within the cooling passage, and that extend in the one direction; having The cooling fin is a plate-like member extending in the one direction and in an insertion direction of the cooling fin that is perpendicular to the one direction.

2. a frame having a cylindrical shape with an inner space serving as a cooling passage through which a coolant flows in one direction, the frame having a plurality of insertion holes penetrating the cylindrical shape from inside to outside; a plurality of battery modules provided corresponding to the insertion holes; Equipped with Each of the battery modules includes: a battery module body provided on an outer peripheral surface of the frame; a plurality of cooling fins that are integrally provided on the battery module body, that are fitted into the insertion holes to be positioned within the cooling passage, and that extend in the one direction; having The battery unit further includes a pressing member surrounding the battery module from an outer periphery side and having both ends fixed to the frame.

3. The battery unit according to claim 2 , wherein the plurality of insertion holes are aligned in the one direction and disposed so as to face each other across the cooling passage.

4. a frame having a cylindrical shape with an inner space serving as a cooling passage through which a coolant flows in one direction, the frame having a plurality of insertion holes penetrating the cylindrical shape from inside to outside; a plurality of battery modules provided corresponding to the insertion holes; Equipped with Each of the battery modules includes: a battery module body provided on an outer peripheral surface of the frame; a plurality of cooling fins that are integrally provided on the battery module body, that are fitted into the insertion holes to be positioned within the cooling passage, and that extend in the one direction; having The battery unit includes a plurality of insertion holes arranged in the one direction and disposed opposite each other with the cooling passage therebetween.

5. 5. The battery unit according to claim 3, wherein the cooling fins fitted into a pair of the insertion holes facing each other across the cooling passage are arranged in a vertically shifted manner.

6. The battery unit according to claim 1 , further comprising an aggregation member provided on an upper surface of the frame for aggregating harnesses extending from the battery modules.

7. a frame having a cylindrical shape with an inner space serving as a cooling passage through which a coolant flows in one direction, the frame having a plurality of insertion holes penetrating the cylindrical shape from inside to outside; a plurality of battery modules provided corresponding to the insertion holes; Equipped with Each of the battery modules includes: a battery module body provided on an outer peripheral surface of the frame; a plurality of cooling fins that are integrally provided on the battery module body, that are fitted into the insertion holes to be positioned within the cooling passage, and that extend in the one direction; having The battery unit further includes an aggregation member provided on an upper surface of the frame for aggregating harnesses extending from the battery modules.

8. a battery unit including a plurality of battery units according to claim 1 arranged in the one direction; The energy storage device further includes an elastic connection portion that connects ends of a pair of adjacent frames and is made of an elastically deformable material.

9. A battery unit comprising: a frame having a cylindrical shape with an inner space serving as a cooling passage through which a refrigerant flows in one direction, the frame having a plurality of insertion holes penetrating the inside and outside of the cylindrical shape; and a plurality of battery modules provided to correspond to the insertion holes, Each of the battery modules includes: a battery module body provided on an outer peripheral surface of the frame; a plurality of cooling fins that are integrally provided on the battery module body, that are fitted into the insertion holes to be positioned within the cooling passage, and that extend in the one direction; having a plurality of the battery units are arranged in the one direction; The energy storage device further includes an elastic connection portion that connects ends of a pair of adjacent frames and is made of an elastically deformable material.

10. a fan unit that pumps a refrigerant into the cooling passage; a duct portion that connects the fan portion and an end portion of the cooling passage, the duct portion having a flow passage cross-sectional area that gradually decreases from the fan portion toward the cooling passage; The power storage device according to claim 8 or 9, further comprising:

11. A vehicle comprising the power storage device according to any one of claims 8 to 10.

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