Storage battery apparatus and storage battery apparatus vehicle mounting structure

Abstract

The objective is to provide a capacitor that suppresses the increase in mass of the capacitor while suppressing the influence on the interior of the capacitor caused by external load input. The apparatus comprises a capacitor cell, a first cover disposed below the capacitor cell, a second cover disposed below the first cover, and a first fiber-containing resin member disposed overlapping the capacitor cell when viewed from the vertical direction, while in contact with at least one of the first cover or the second cover.

Description

Technology Field

[0001] The present disclosure relates to a battery storage device, in particular a battery storage device mounted in a vehicle, and a vehicle mounting structure of the battery storage device. Background Technology

[0002] In conventional energy storage devices, various structures have been proposed to suppress the influence on the interior of the energy storage device caused by external load input (e.g., road surface interference).

[0003] For example, the energy storage device described in Japanese Patent Publication No. 2023-46945 is disclosed to have a lower case and a share panel disposed below the lower case.

[0004] In a capacitor device configured as described above, in order to suppress the impact on the interior of the capacitor device, particularly on the capacitor cells, caused by a stronger external load input, it is necessary to increase the strength of the shear panel (protection panel), but there is a risk that the mass of the capacitor device will increase. The problem to be solved

[0005] The present disclosure provides a battery storage device and a vehicle mounting structure for the battery storage device, and provides a battery storage device and a vehicle mounting structure for the battery storage device in which the influence on the interior of the battery storage device by external load input is suppressed while suppressing an increase in the mass of the battery storage device. means of solving the problem

[0006] A capacitor device according to a first embodiment comprises a capacitor cell, a first cover disposed below the capacitor cell, a second cover disposed below the first cover, and a first fiber-containing resin member disposed overlapping the capacitor cell when viewed from the vertical direction, while in contact with at least one of the first cover or the second cover.

[0007] According to the capacitor device of the first embodiment, a first fiber-containing resin member is provided that is in contact with at least one of the first cover or the second cover and is arranged to overlap with the capacitor cell when viewed from the vertical direction. Accordingly, the strength of at least one of the first cover or the second cover is improved below the capacitor cell. Because of this, compared to the case where a metal member is used, the strength of the capacitor device below the capacitor cell can be improved while suppressing an increase in the mass of the capacitor device, so that, for example, when a load is input to the capacitor device from below, the effect on the inside of the capacitor device can be suppressed.

[0008] A capacitor device according to a second embodiment comprises, in the first embodiment, a plurality of capacitor cells, wherein the plurality of capacitor cells are arranged side by side in a first direction, and the first fiber-containing resin member is installed extending in the first direction and is arranged overlapping with the plurality of capacitor cells when viewed from the upper and lower directions.

[0009] According to the capacitor device of the second embodiment, the first fiber-containing resin member extends in a first direction and is configured to be arranged in an overlapping manner with a plurality of capacitor cells in the vertical direction. Accordingly, the strength of at least one of the first cover or the second cover is enhanced below the plurality of capacitor cells. Because of this, for example, when a load is input to the capacitor device from below, the influence on the interior of the capacitor device can be further suppressed.

[0010] In the capacitor device according to the third embodiment, in the second embodiment, the first fiber-containing resin member is disposed between the first cover and the second cover.

[0011] According to the capacitor device of the third embodiment, the first fiber-containing resin member is configured to be positioned between the first cover and the second cover. Accordingly, for example, when a load is input from below into the capacitor device, the load is transmitted upward while the first fiber-containing resin member is sandwiched between the two members of the first cover and the second cover, which have relatively high rigidity. Because of this, the upward displacement of the first fiber-containing resin member, which has relatively high strength at the bottom of the capacitor cell, can be suppressed, thereby further suppressing the influence on the inside of the capacitor device.

[0012] The capacitor device according to the fourth embodiment further comprises, in the second embodiment, a first reinforcement positioned on one side of a second direction orthogonal to the first direction of the capacitor cell, which is installed extending in the first direction, and the first fiber-containing resin member has one end in the second direction positioned to overlap with the first reinforcement when viewed from the up-down direction.

[0013] According to the capacitor device of the fourth embodiment, the first fiber-containing resin member is configured to overlap the first reinforcement in the vertical direction at one end in the second direction. Accordingly, when a load is input from below to the capacitor device, the upward displacement of the first fiber-containing resin member is limited by the first reinforcement. Because of this, the capacitor device can more reliably bear the load input from below at the location where the first fiber-containing resin member, which has relatively high strength, is positioned below the capacitor cell, thereby further suppressing the impact on the interior of the capacitor device.

[0014] The vehicle mounting structure of the battery device according to the fifth embodiment comprises a battery device in any one of the first to fourth embodiments, and the vehicle comprises a vehicle frame member extending in the vehicle width direction, which is arranged overlapping with the battery device when viewed from the vehicle's vertical direction, and the first fiber-containing resin member is arranged overlapping with the vehicle frame member when viewed from the vehicle's vertical direction.

[0015] According to the vehicle mounting structure of the energy storage device according to the fifth embodiment, the first fiber-containing resin member is arranged to overlap with the vehicle frame member when viewed from the vertical direction of the vehicle. Accordingly, the strength of the energy storage device is improved in the lower part of the energy storage cell that is arranged to overlap with the vehicle frame member when viewed from the vertical direction of the vehicle. Because of this, when a load is input to the energy storage device from below, the influence on the interior of the energy storage device can be further suppressed in the lower part of the vehicle frame member, which is a location between the vehicle frame member and the energy storage device and is at a high risk of the load being input to the energy storage device.

[0016] The vehicle-mounted structure of the energy storage device according to the sixth embodiment is, in the fifth embodiment, the energy storage device further comprises an energy storage module composed of a plurality of energy storage cells, and the first fiber-containing resin member is installed extending from the end of the energy storage module on the vehicle front side to the central part of the energy storage module in the vehicle front-rear direction.

[0017] According to the vehicle-mounted structure of the energy storage device according to the sixth embodiment, the first fiber-containing resin member is installed extending from the end on the front side of the vehicle in the vehicle-front direction of the energy storage module to the center part of the energy storage module in the vehicle-front direction. Accordingly, the strength of the energy storage device is improved over the area from the end on the front side of the vehicle to the center part in the vehicle-front direction. Therefore, when a load is input to the energy storage device from below, the influence on the interior of the energy storage device can be further suppressed in the area from the end on the front side of the vehicle to the center part in the vehicle-front direction, which is a location where there is a relatively high risk of a load being input to the energy storage device from below.

[0018] The capacitor device according to the seventh embodiment, in the sixth embodiment, comprises a second reinforcement extended in the vehicle width direction, and the first fiber-containing resin member is extended from the vehicle front end of the capacitor module to the second reinforcement.

[0019] According to the energy storage device of the seventh embodiment, the first fiber-containing resin member is installed extending from the vehicle-front end of the energy storage module to the second reinforcement. Accordingly, the strength of the energy storage device is enhanced over the distance from the vehicle-front end of the energy storage module to the second reinforcement, and, for example, when a load is input from below to the energy storage device, the upward displacement of the first fiber-containing resin member in the central part of the vehicle's front-rear direction is limited. Because of this, when a load is input from below to the energy storage device, the impact on the interior of the energy storage device can be further suppressed in the distance from the vehicle-front end of the energy storage module to the second reinforcement, which is a location where there is a relatively high risk of a load being input from below to the energy storage device. Furthermore, the energy storage device can more reliably bear the load input from below at the location where the first fiber-containing resin member, which has relatively high strength, is positioned below the energy storage cell, thereby further suppressing the impact on the interior of the energy storage device.

[0020] The capacitor device according to the eighth embodiment further comprises, in any one of the first to fourth embodiments, a second fiber-containing resin member that is in contact with either the first cover or the second cover and is arranged to overlap both the capacitor cell and the first fiber-containing resin member when viewed from the vertical direction.

[0021] According to the capacitor device of the eighth embodiment, it further comprises a second fiber-containing resin member that is in contact with either the first cover or the second cover and is arranged to overlap both the capacitor cell and the first fiber-containing resin member when viewed from the vertical direction. Accordingly, the strength is further enhanced by the arrangement of a second fiber-containing resin member with relatively higher strength in addition to the first fiber-containing resin member below the capacitor cell. Therefore, when a load is input to the capacitor device from below, the impact on the interior of the capacitor device can be further suppressed. Effects of the invention

[0022] According to the battery device and the vehicle mounting structure of the battery device according to the present disclosure, it is possible to provide a battery device in which the influence on the interior of the battery device is suppressed when a load is input from the outside while suppressing an increase in the mass of the battery device. Brief explanation of the drawing

[0023] Exemplary embodiments of the present invention are described in detail based on the following drawings. FIG. 1 is an exploded perspective view showing a schematic of the vehicle mounting structure of the battery device (100) according to embodiment 1. FIG. 2 is an exploded perspective view showing a schematic of the capacitor device (100) shown in FIG. 1. FIG. 3 is a perspective view showing the capacitor module (110) shown in FIG. 2. FIG. 4 is a cross-sectional view of the battery device (100) shown in FIG. 1, viewed from the front and rear directions of the vehicle. FIG. 5 is an enlarged view of the reinforcement (131) shown in FIG. 4, seen from the front and rear directions of the vehicle. FIG. 6 is a cross-sectional view of the vehicle-mounted structure of the battery device (100) shown in FIG. 1, viewed from the front-rear direction of the vehicle. FIG. 7 is a cross-sectional view of a battery device according to embodiment 2, viewed from the front-rear direction of the vehicle. Specific details for implementing the invention

[0024] The battery device according to the present embodiment will be described with reference to the drawings. Additionally, the arrows UP, FR, and RH appropriately shown in each drawing represent, respectively, the upper direction in the vehicle's vertical direction, the front direction in the vehicle's front-rear direction, and the right direction in the vehicle's left-right direction (vehicle width direction) in the vehicle V equipped with the vehicle battery device (10). Furthermore, in the following description, when simply using the directions of up / down, front / rear, and left / right, unless otherwise specified, they represent the front / rear direction in the vehicle's front-rear direction, the up / down direction in the vehicle's vertical direction, and the left / right direction in the vehicle's left-right direction (vehicle width direction), respectively. Additionally, when using the positional relationships of up, down, front, rear, left, and right, unless otherwise specified, they represent the front and rear directions in the vehicle's front-rear direction, the up and down directions in the vehicle's vertical direction, and the left and right directions in the vehicle's left-right direction (vehicle width direction), respectively.

[0025] Furthermore, unless otherwise specifically stated in the specification, each element is not limited to a single one and may exist in multiple instances. Additionally, in the drawings, substantially identical elements are assigned the same reference numeral to omit redundant descriptions in the specification.

[0026] (Embodiment 1)

[0027] [Full Composition]

[0028] FIG. 1 is an exploded perspective view showing a schematic of the vehicle mounting structure of a battery device (100) according to embodiment 1. As shown in FIG. 1, the battery device (100) is mounted below the vehicle frame (10). For example, the battery device (100) is joined to the vehicle frame (10) at its periphery.

[0029] The vehicle frame (10) is configured to include a center module (11), a front module (12) located in front of the center module (11), and a rear module (13) located behind the center module (11). Additionally, the front module (12) and the rear module (13) may each be formed by joining a plurality of frame members, or a portion of the frame may be integrally formed by a method such as casting.

[0030] The center module (11) is configured to include a front frame member (11a), a pair of side frame members (11b), a rear frame member (11c), a front cross member (11d), and a rear cross member (11e). The front cross member (11d) and the rear cross member (11e) each have their left and right ends joined to the pair of side frame members (11b).

[0031] FIG. 2 is a perspective view showing a capacitor module (110) illustrated in FIG. 1. The capacitor device (100) is equipped with a plurality of capacitor modules (110). For example, the plurality of capacitor modules (110) are arranged side by side in the left-right direction. As will be described in detail later, for example, the capacitor module (110) is configured to include a plurality of capacitor cells arranged side by side in the front-back direction. In addition, the plurality of capacitor modules (110) may be arranged side by side in the front-back direction, and in that case, the plurality of capacitor cells may be arranged side by side in the left-right direction.

[0032] The capacitor module (110) is housed in a case comprising an upper cover (120) and a lower cover (130). The upper cover (120) and the lower cover (130) are joined together by known methods, such as fastening or adhesive. More specifically, the upper cover (120) is located above the capacitor cell. The lower cover (130), serving as the first cover, is located below the capacitor cell.

[0033] A protective panel (140) serving as a second cover is provided below the lower cover (130). As will be described in detail later, the protective panel (140) is formed by being joined to the lower cover (130) by known methods, such as fastening or using an adhesive.

[0034] The upper cover (120) may serve as a floor panel that partitions at least a portion of the interior and exterior of the vehicle in an area that is forward of the central portion in the front-rear direction. In this case, the upper cover (120) may be joined to the front cross member (11d) or the rear cross member (11e) using known methods, such as fastening.

[0035] The upper cover (120) has a battery device (150) positioned above it in an area that is at least rearward from the central portion in the front-rear direction. For example, the battery device is electrically connected to a sensor, etc., that detects the state of the storage cell, such as temperature, voltage, and current, which will be described in detail later. For example, the battery device (150) includes at least one selected from a Battery Management System (BMS), an Electronic Control Unit (ECU), a DC-DC converter, a System Main Relay (SMR), etc.

[0036] The battery device (150) is configured such that its upper portion is covered by a device cover (160). The device cover (160) may accommodate the battery device (150) by being joined to a device base on which the battery device (150) is placed. Additionally, the device cover (160) may accommodate the battery device (150) by being joined to an upper cover (120).

[0037] FIG. 3 is a perspective view showing a capacitor module (110) illustrated in FIG. 2. The capacitor module (110) is configured such that a plurality of capacitor cells (111) are arranged side by side in the front-rear direction. For example, the capacitor cells (111) may each have electrode terminals on both ends in the left-right direction. Furthermore, the electrode terminals of the capacitor cells (111) are not limited to being provided on both ends in the left-right direction, but may be provided only on one end in the left-right direction. Additionally, the electrode terminals of the capacitor cells (111) may be provided on both ends in the up-down direction, or may be provided only on one end in the up-down direction. Furthermore, in the capacitor module (110) according to Embodiment 1, a capacitor module (110) including capacitor cells (111) arranged side by side in the front-rear direction is exemplified, but the capacitor module (110) may include a plurality of capacitor cells (111) and is not limited to the aspects of the present embodiment.

[0038] Additionally, an inter-cell member may be disposed between adjacent capacitor cells (111). For example, the inter-cell member may be a cooler, an insulating member, an insulating member, or an elastic member. Additionally, an intermediate member, which will be described in detail later, may be disposed between adjacent capacitor cells (111), at least in some parts. When the capacitor module (110) is configured to include an intermediate member, the displacement of the capacitor cells (111) within the capacitor module (110) in the front-rear direction can be more reliably suppressed.

[0039] A pair of end plates (112) are each disposed at both ends of a plurality of capacitor cells (111) arranged side by side in the front-rear direction. The pair of end plates (112) are connected by a pair of side plates (113) to suppress displacement of the plurality of capacitor cells (111) in the front-rear direction.

[0040] Additionally, the capacitor cells (111) arranged in a plurality of parallel directions in the front-rear direction may have a Cell to Pack (CTP) structure in which a portion of the surface of the case accommodating the capacitor device (100) is located at at least one end. Accordingly, the space efficiency inside the capacitor device can be improved.

[0041] Additionally, the capacitor cells (111) arranged side by side in the front-rear direction may have a CTC (Cell to Chassis) structure in which a part of the vehicle frame (10) is located at at least one end. Accordingly, the multiple capacitor cells can be held and supported more firmly while improving the space efficiency inside the capacitor device.

[0042] A bus bar module (114) is provided at the electrode terminal (115) of a capacitor cell (111) to electrically connect the electrode terminals (115) of adjacent capacitor cells (111). The bus bar module (114) electrically connects, for example, the electrode terminals (115) of adjacent capacitor cells (111) to form part of a circuit. Additionally, the bus bar module (114) is not limited to the electrode terminals (115) of adjacent capacitor cells (111) and may electrically connect the electrode terminals (115) of non-adjacent capacitor cells (111) within the capacitor module (110).

[0043] Additionally, the capacitor module (110) is configured such that an intermediate member (117), which is not shown in FIG. 4, is provided between adjacent pairs of capacitor cells (111).

[0044] The intermediate member (117) is a frame material made of, for example, a metal such as iron or aluminum. The intermediate member (117) is connected to, for example, an end plate (112c) and a side plate (113c) to suppress displacement of the capacitor cell (311) in the front-rear direction.

[0045] The intermediate member (117) is positioned to protrude in one or both directions in the left-right direction, for example, from the capacitor cell (111). Additionally, the intermediate member (117) may be positioned to protrude in one or both directions in the up-down direction, for example, from the capacitor cell (311).

[0046] The intermediate member (117) may be positioned in the center of the capacitor module (110) in the front-rear direction. When the capacitor module (110) includes n intermediate members (117), the n intermediate members (117) may be positioned in the parts that divide the capacitor module (110) into (n+1) equal parts in the front-rear direction.

[0047] FIG. 4 is a cross-sectional view of the battery device (100) shown in FIG. 1, viewed from the front-rear direction of the vehicle. Above the lower cover (130), a plurality of reinforcements (131) (first reinforcements) are provided, spaced apart in the left-right direction and extending in the front-rear direction. Between the plurality of reinforcements (131), a battery module (110) having a plurality of battery cells (111) is arranged. The battery module (110) is joined to the reinforcements (131), for example, through an adhesive. In addition, the battery cells (110) may be joined to the reinforcements (131) by known methods such as fastening or welding, in addition to the adhesive.

[0048] In addition, in the above configuration, a space is formed between the capacitor cell (111) and the lower cover (130) in the vertical direction. For example, the distance between the capacitor cell (111) and the lower cover (130) in the vertical direction is greater than the distance between the lower case and the protective panel in the vertical direction, which will be described in detail later. In this case, when the lower cover (130) or the protective panel (140) is deformed toward the capacitor cell, the load input to the capacitor cell (111) can be suppressed.

[0049] The lower cover (130) may have a thickness in the vertical direction of 0.5 mm or more and 5 mm or less. More preferably, it is 0.5 mm or more and 3 mm or less. More preferably, it is 0.5 mm or more and 1 mm or less.

[0050] The lower cover (130) is made of, for example, iron. It may also be made of aluminum. Furthermore, it is not limited to iron, and may be made of, for example, a compound such as an alloy containing iron or aluminum.

[0051] FIG. 5 is an enlarged view of the reinforcement (131) shown in FIG. 4, seen from the front-rear direction of the vehicle. As shown in FIG. 5, the reinforcement (131) is composed of a plurality of members, including an upper reinforcement (1310) and a lower reinforcement (1311). The upper reinforcement (1310) is composed of a first planar section (1310a), a second planar section (1310b), a third planar section (1310c) positioned above the first planar section (1310a) and the second planar section (1310b), a first connecting section (1310d) connecting the first planar section (1310a) and the third planar section (1310c), and a second connecting section (1310e) connecting the second planar section (1310b) and the third planar section (1310c). The lower reinforcement (1311) comprises a fourth planar section (1311a), a fifth planar section (1311b), a sixth planar section (1311c) positioned below the fourth planar section (1311a) and the fifth planar section (1311b), a seventh planar section (1311d), an eighth planar section (1311e), a third connecting section (1311f) connecting the fourth planar section (1311a) and the sixth planar section (1311c), a fourth connecting section (1311g) connecting the fourth planar section (1311a) and the seventh planar section (1311d), a fifth connecting section (1311h) connecting the fifth planar section (1311b) and the seventh planar section (1311d), and the fifth planar section (1311b) and the eighth planar section. It is configured to include a sixth connecting part (1311i) connecting the planar part (1311e). Additionally, the upper reinforcement (1310) and the lower reinforcement (1311) may be integrally formed by a method such as casting or extrusion.

[0052] Furthermore, as illustrated in FIGS. 4 and 5, a bus bar module (114) electrically connected to an electrode terminal (115) provided by a capacitor cell (111) is arranged to overlap in the vertical direction with a third planar portion provided by a reinforcement (131). Additionally, the electrode terminal (115) provided by the capacitor cell (111) and the third planar portion may be arranged to overlap in the vertical direction. Furthermore, unless otherwise specifically mentioned in the specification, "arranged to overlap in the vertical direction" indicates that at least a portion may be arranged to overlap in the vertical direction.

[0053] Returning to FIG. 4, the upper cover (120) of the capacitor device (100) will be described. An upper cover (120) is provided above the capacitor cell (111). The upper cover (120) is provided with a convex portion (121) that is convex downward above the capacitor cell. Additionally, a cooler (170) is positioned above the convex portion (121) in contact with the convex portion (121). Furthermore, a heat-conducting member (116) is positioned below the convex portion (121) in contact with both the capacitor cell (111) and the upper cover (120).

[0054] Additionally, the protective panel (140) is joined to the lower side of the lower cover (130), and a gap is provided between the protective panel (140) and the lower cover (130). Additionally, a first resin member (141) is disposed between the protective panel (140) and the lower cover (130). The first resin member (141) is disposed in contact with the lower cover (130). Additionally, the first resin member (141) is disposed in contact with the protective panel (141). According to the above configuration, the rigidity of the lower cover and the protective panel, specifically the bending rigidity, and more specifically the second moment of area, can be improved while suppressing an increase in the mass of the energy storage device (100), so that the effect on the interior of the energy storage device (100), particularly the energy cell (111), can be suppressed when an external load is input to the energy storage device (100) due to, for example, road surface interference.

[0055] The first resin member (141) may be positioned in contact with both the lower cover (130) and the protective panel (140) at the same location. Additionally, unless otherwise specifically stated in the specification, "in contact" indicates that at least a portion may be in contact, and may be in contact over the entire surface of the opposing side.

[0056] The protective panel (140) is composed of, for example, aluminum. It may also be composed of iron. Furthermore, it is not limited to iron, but may be composed of, for example, a compound such as an alloy containing iron or aluminum.

[0057] The protective panel (140) may have a thickness of 1 mm or more and 5 mm or less in the vertical direction. More preferably, it is 2 mm or more and 4 mm or less.

[0058] The first resin member (141) may have a width in the left-right direction of 3 mm or more and 20 mm or less. More preferably, it is 5 mm or more and 20 mm or less, and even more preferably, 10 mm or more and 20 mm or less.

[0059] The first resin member (141) may have a thickness of 1 mm or more and 5 mm or less in the vertical direction. More preferably, it is 2 mm or more and 4 mm or less.

[0060] The first resin member (141) may be composed of at least one type selected from, for example, PE (polyethylene), PP (polypropylene), PE foam, PP foam, GFRP (glass fiber reinforced resin), CFRP (carbon fiber reinforced resin), etc.

[0061] The first resin member (141) may be bonded to the lower cover (130) via an adhesive on its upper surface. Additionally, the first resin member (141) may be bonded to the protective panel (140) via an adhesive on its lower surface. Furthermore, unless otherwise specifically stated in the specification, "contacting" indicates that at least a portion of the surfaces may be in contact, or that the entire surface of the opposing surfaces may be in contact.

[0062] The first resin member (141) may be an adhesive resin, and may be composed of at least one type selected from, for example, urethane-based adhesive, epoxy-based adhesive, silicone-based adhesive, acrylic-based adhesive, etc. In this case, the first resin member (141) may be bonded to the lower cover (130) or the protective panel (140) on at least one of the upper or lower surfaces without preparing an adhesive.

[0063] The first resin member (141) extends in the front-rear direction and is arranged to overlap with a plurality of capacitor cells (111) in the vertical direction. Additionally, the first resin member (141) is arranged to overlap with a reinforcement (131) in the vertical direction. According to the above configuration, when a load is input from the outside to the capacitor device (100), the input load can be transferred to a reinforcement (131) with relatively high rigidity inside the capacitor device (100), thereby further suppressing the influence on the inside of the capacitor device (100), particularly on the capacitor cells (111).

[0064] Additionally, the first resin member (141) may be arranged in an overlapping manner with the capacitor cell (111) in the vertical direction at the center of the capacitor cell (111) in the left-right direction. According to the above configuration, when a load is input from the outside to the capacitor device (100), the amount of deformation of the protective panel (140) below the capacitor cell (111) is suppressed, thereby further suppressing the influence on the interior of the capacitor device (100), particularly on the capacitor cell (111).

[0065] A second resin member (142) is disposed between the protective panel (140) and the lower cover (130). The second resin member (142) is disposed in contact with the protective panel (140).

[0066] The second resin member (142) may be positioned in contact with both the lower cover (130) and the protective panel (140) at least in part.

[0067] The second resin member (142) may have a width in the left-right direction of 3 mm or more and 20 mm or less. More preferably, it is 5 mm or more and 20 mm or less, and even more preferably, 10 mm or more and 20 mm or less.

[0068] The second resin member (142) may have a thickness of 1 mm or more and 5 mm or less in the vertical direction. More preferably, it is 2 mm or more and 4 mm or less.

[0069] The second resin member (142) is configured to have a lower Young's modulus than the first resin member (141). The second resin member (142) may be composed of at least one type selected from, for example, PE (polyethylene), PP (polypropylene), PE foam, PP foam, GFRP (glass fiber reinforced resin), CFRP (carbon fiber reinforced resin), etc. According to the above configuration, a portion that transmits a load to the protection panel (140) and a portion that absorbs a load to the protection panel (140) are formed, thereby making it easy to set the deformation points of the protection panel (140), so that when a load is input from the outside to the storage device (100), the effect on the inside of the storage device (100), particularly the storage cell (111), can be suppressed.

[0070] The second resin member (142) is composed of an adhesive. For example, it may be composed of at least one type selected from urethane-based adhesives, epoxy-based adhesives, silicone-based adhesives, acrylic-based adhesives, etc. In this case, the second resin member (142) can be bonded to the lower cover (130) or the protective panel (140) on at least one of the upper or lower surfaces without preparing an adhesive separately. According to the above configuration, the number of bonding points between the lower cover (130) and the protective panel (140) can be increased without increasing the number of fastening parts, thereby improving the bonding strength between the lower cover (130) and the protective panel (140).

[0071] Additionally, the second resin member (142) may be configured to have a greater adhesive strength to the lower cover (130) or protective panel (140) than the first resin member (141). Accordingly, the lower cover and the protective panel can be bonded more firmly.

[0072] The second resin member (142) extends in the front-rear direction and is arranged to overlap with a plurality of capacitor cells (111) in the vertical direction. Additionally, the second resin member (142) is arranged to overlap with the reinforcement (131) in the vertical direction. According to the above configuration, when a load is input from the outside to the capacitor device (100), the load is transferred to the reinforcement (131), which has relatively high rigidity, thereby further suppressing the influence on the interior of the capacitor device (100), particularly on the capacitor cells (111).

[0073] Additionally, the second resin member (142) may be arranged in an overlapping manner with the capacitor cell (111) in the vertical direction at the center of the capacitor cell (111) in the left-right direction.

[0074] The first resin member (141) is arranged in multiple parallel in the left-right direction. The first resin member (141) may be arranged between multiple second resin members (142) in the left-right direction. According to the above configuration, since multiple locations are provided for the load to be transmitted when the protective panel (140) is deformed upward while suppressing an increase in the mass of the energy storage device (100), the space for the protective panel (140) to deform and absorb the input load between the lower cover (130) and the protective panel (140) can be reduced, thereby allowing the energy storage device (100) to be miniaturized.

[0075] The second resin members (142) are arranged in multiple parallel in the left-right direction. The second resin members (142) may be arranged between multiple first resin members (141) in the left-right direction.

[0076] A first fiber-containing resin member (143) is disposed between the protective panel (140) and the lower cover (130). The first fiber-containing resin member (143) is disposed in contact with the lower cover (130). Additionally, the first fiber-containing resin member (143) is disposed in contact with the protective panel (140).

[0077] [Main Sections]

[0078] The first fiber-containing resin member (143) is a resin member containing fiber material and may be composed of at least one type of resin member selected from, for example, PE (polyethylene), PP (polypropylene), PE foam, PP foam, GFRP (glass fiber reinforced resin), CFRP (carbon fiber reinforced resin), etc.

[0079] The fiber material may be composed of at least one type selected from, for example, para-aramid fibers, meta-aramid fibers, high molecular weight polyethylene fibers, polyarylate fibers, PVA (polyvinyl alcohol) fibers, PBO (polyparaphenylenebenzobisoxazole) fibers, PPS (polyphenylene sulfide) fibers, polyimide fibers, PAN-based carbon fibers, pitch diameter carbon fibers, glass fibers, boron fibers, silicon carbide fibers, etc.

[0080] The first fiber-containing resin member (143) is configured to have a higher strength compared to the first resin member (141). Here, "high strength" refers to having at least one strength selected from, for example, tensile strength, compressive strength, bending strength, etc., being relatively high.

[0081] The first fiber-containing resin member (143) may have a thickness of 1 mm or more and 5 mm or less in the vertical direction. More preferably, it is 2 mm or more and 4 mm or less.

[0082] The first fiber-containing resin member (143) is arranged to overlap the capacitor cell (111) in the vertical direction. Additionally, the first fiber-containing resin member (143) is arranged to overlap the central part of the capacitor cell (111) in the vertical direction.

[0083] The first fiber-containing resin member (143) is arranged to extend in the left-right direction from one adjacent reinforcement (131) to the other reinforcement (131). Additionally, in the left-right direction, the end of the first fiber-containing resin member (143) is arranged to overlap in the up-down direction with the sixth planar portion (eighth planar portion) of the reinforcement (131).

[0084] The first fiber-containing resin member (143) is formed by being bonded to at least one of the lower cover (130) or the protective panel (140) using a known method, such as an adhesive.

[0085] FIG. 6 is a cross-sectional view of the vehicle-mounted structure of the battery device (100) shown in FIG. 1, viewed from the front-rear direction of the vehicle. The first fiber-containing resin member (143) is arranged extending in the front-rear direction and is arranged overlapping both sides of 13d and 13e in the up-down direction.

[0086] Additionally, the first fiber-containing resin member (143) is arranged to extend in the front-rear direction from the front end of the capacitor module (110) to the center in the front-rear direction of the capacitor module (110). Furthermore, the phrase “arranged from the front end of the capacitor module (110) to the center in the front-rear direction of the capacitor module (110)” means that it only needs to be arranged between the front end of the capacitor module (110) and the center in the front-rear direction of the capacitor module (110).

[0087] The first fiber-containing resin member (143) is arranged to extend in the front-rear direction from at least the front end of the capacitor module (110) to the intermediate member (117) (second reinforcement). The phrase “arranged from the front end of the capacitor module (110) to the intermediate member (117)” means that it is sufficient to be arranged between at least the front end of the capacitor module (110) and the intermediate member (117). Furthermore, although the intermediate member (117) is shown as an example of the second reinforcement above, the second reinforcement may be a rigid member such as a cross member that is arranged inside the capacitor device and extended in the vehicle width direction.

[0088] (Action and Effect of Embodiment 1)

[0089] Next, the operation and effect of the battery storage device (100) and the vehicle-mounted structure of the battery storage device (100) according to Embodiment 1 will be explained.

[0090] In the capacitor device (100) according to embodiment 1, as shown in FIG. 4, a first fiber-containing resin member (143) containing a fiber material is formed by being joined to at least one of a lower cover (130) or a protective panel (140). Additionally, the first fiber-containing resin member (143) is arranged to overlap with the capacitor cell (111) in the vertical direction. Accordingly, the strength of at least one of the lower cover (130) or the protective panel (140) is improved below the capacitor cell (111). Because of this, compared to the case where a metal member is used, the strength of the capacitor device (100) below the capacitor cell (111) can be improved while suppressing an increase in the mass of the capacitor device (100), so that, for example, when a load is input from below to the capacitor device (100), the effect on the inside of the capacitor device (100) can be suppressed.

[0091] Next, other effects of the capacitor device (100) according to Embodiment 1 will be described in detail.

[0092] First, in the capacitor device (100) according to embodiment 1, as shown in FIG. 4, a first fiber-containing resin member (143) is extended in a first direction and is configured to overlap with a plurality of capacitor cells (111) in an up-and-down direction. Accordingly, the strength of at least one of the lower cover (130) or the protective panel (140) is improved below the plurality of capacitor cells (111). Because of this, for example, when a load is input from below to the capacitor device (100), the impact on the inside of the capacitor device (100) can be further suppressed.

[0093] Secondly, in the capacitor device (100) according to embodiment 1, as shown in FIG. 4, a first fiber-containing resin member (143) is configured to be positioned between a lower cover (130) and a protective panel (140). Accordingly, for example, when a load is input from below to the capacitor device (100), the load is transmitted upward while the first fiber-containing resin member (143) is sandwiched between the two members of the lower cover (130) and the protective panel (140), which have relatively high rigidity. Because of this, the first fiber-containing resin member (143), which has relatively high strength, can be prevented from being displaced upward from below the capacitor cell (111), thereby further preventing the impact on the inside of the capacitor device.

[0094] Thirdly, in the capacitor device (100) according to embodiment 1, as shown in FIG. 4, the first fiber-containing resin member (143) is configured to overlap the first reinforcement (131) in the vertical direction at one end in the second direction. Accordingly, when a load is input from below to the capacitor device (100), the upward displacement of the first fiber-containing resin member (143) is limited by the first reinforcement (131). Because of this, the capacitor device (100) can more reliably bear the load input from below at the location where the first fiber-containing resin member (143), which has relatively high strength, is positioned below the capacitor cell (111), thereby further suppressing the influence on the inside of the capacitor device (100).

[0095] Fourth, in the energy storage device (100) according to embodiment 1, as shown in FIG. 4, the first fiber-containing resin member (143) is arranged to overlap with the front seat cross member (13d) and the rear seat cross member (13e) as vehicle frame members when viewed from the vehicle's vertical direction. Accordingly, the strength of the energy storage device (100) is improved in the lower part of the energy storage cell (111) arranged to overlap with the front seat cross member (13d) and the rear seat cross member (13e) when viewed from the vehicle's vertical direction. For this reason, when a load is input from below to the battery storage device (100), the influence on the inside of the battery storage device (100) can be further suppressed in the area below the front seat cross member (13d) and the rear seat cross member (13e), which is a location between the front seat cross member (13d) and the rear seat cross member (13e) and where there is a high risk of the load being input to the battery storage device (100).

[0096] Fifth, the first fiber-containing resin member (143) is installed extending from the end on the front side of the vehicle in the vehicle-front direction of the energy storage module (110) to the center part in the vehicle-front direction of the energy storage module (110). Accordingly, the strength of the energy storage device (100) is improved over the area from the end on the front side of the vehicle in the energy storage module (110) to the center part in the vehicle-front direction. Because of this, when a load is input from below to the energy storage device (100), the influence on the interior of the energy storage device (100) can be further suppressed in the area from the end on the front side of the vehicle in the energy storage module (110) to the center part in the vehicle-front direction, which is a location where there is a relatively high risk of a load being input from below to the energy storage device (100).

[0097] Sixth, in the capacitor device (100) according to embodiment 1, the first fiber-containing resin member (143) is installed extending from the vehicle-front side end of the capacitor module (110) to the second reinforcement (117). Accordingly, the strength of the capacitor device (100) is improved over the distance from the vehicle-front side end of the capacitor module (110) to the second reinforcement (117), and, for example, when a load is input from below to the capacitor device (100), the upward displacement of the first fiber-containing resin member (143) in the central part of the vehicle-front direction is limited. For this reason, when a load is input from below to the energy storage device (100), the impact on the inside of the energy storage device (100) can be further suppressed in the area between the vehicle front end of the energy storage module (110), which is a location where there is a relatively high risk of a load being input from below to the energy storage device (100), and the energy storage device (100) can more reliably bear the load input from below at the location where a first fiber-containing resin member (143) with relatively high strength is placed below the energy storage cell (111), thereby further suppressing the impact on the inside of the energy storage device (100).

[0098] (Embodiment 2)

[0099] FIG. 7 is a cross-sectional view of a battery device according to Embodiment 2, viewed from the front-rear direction of a vehicle. The battery device (200) according to Embodiment 2 is configured to further include a second fiber-containing resin member (232) in addition to the first fiber-containing resin member (143) disclosed in Embodiment 1. The second fiber-containing resin member (232) is configured as a resin member comprising a fiber material. The battery device according to Embodiment 2 is configured substantially the same as Embodiment 1 except for the above configurations.

[0100] The fiber material may be composed of at least one type selected from, for example, para-aramid fibers, meta-aramid fibers, high molecular weight polyethylene fibers, polyarylate fibers, PVA (polyvinyl alcohol) fibers, PBO (polyparaphenylenebenzobisoxazole) fibers, PPS (polyphenylene sulfide) fibers, polyimide fibers, PAN-based carbon fibers, pitch diameter carbon fibers, glass fibers, boron fibers, silicon carbide fibers, etc.

[0101] The second fiber-containing resin member (232) is configured to have a higher strength compared to the first resin member (143). Here, "high strength" refers to having at least one strength selected from, for example, tensile strength, compressive strength, bending strength, etc., being relatively high.

[0102] The second fiber-containing resin member (232) may have a thickness of 1 mm or more and 5 mm or less in the vertical direction. More preferably, it is 2 mm or more and 4 mm or less.

[0103] The second fiber-containing resin member (232) is formed by being bonded to the lower cover (130) on the surface (upper surface) facing the capacitor cell (111) of the lower cover (130).

[0104] The second fiber-containing resin member (232) is arranged to overlap the capacitor cell (111) in the vertical direction. Additionally, it is arranged to overlap the central part of the capacitor cell (111) in the vertical direction.

[0105] In the above example, the second fiber-containing resin member (232) is shown as being bonded to the lower cover (130) on the surface (upper surface) facing the capacitor cell (111) of the lower cover (130), but the second fiber-containing resin member (232) may be bonded to the upper surface of the first fiber-containing resin member (143). Additionally, the second fiber-containing resin member (232) may be placed between the lower cover (130) and the protective panel (140), and in this case, the first fiber-containing resin member (143) may be placed between the lower cover (130) and the protective panel (140), and may be placed above the second fiber-containing resin member (232) or below the second fiber-containing resin member (232), and furthermore, the first fiber-containing resin member (143) may be placed below the protective panel (140).

[0106] (Action and Effect of Embodiment 2)

[0107] Next, the operation and effect of the capacitor device (200) according to embodiment 2 will be explained.

[0108] In the capacitor device (200) according to embodiment 2, as shown in FIG. 7, a second fiber-containing resin member (232) is further provided, which is in contact with either the lower cover (130) or the protective panel (140) and is arranged overlappingly with both the capacitor cell (111) and the first fiber-containing resin member (143) when viewed from the vertical direction. Accordingly, the strength is further enhanced by the arrangement of the second fiber-containing resin member (232), which has relatively higher strength, in addition to the first fiber-containing resin member (143) below the capacitor cell (111). Because of this, when a load is input from below to the capacitor device (100), the influence on the inside of the capacitor device (100) can be further suppressed.

[0109] The embodiments disclosed herein are illustrative in all respects and should not be considered limiting. The scope of this disclosure is defined by the claims, and all modifications within the meaning and scope equivalent to the claims are intended to be included.

Claims

Claim 1 A capacitor device comprising a capacitor cell, a first cover disposed below the capacitor cell, a second cover disposed below the first cover, and a first fiber-containing resin member disposed overlapping the capacitor cell when viewed from the vertical direction, while in contact with at least one of the first cover or the second cover. Claim 2 A capacitor device according to claim 1, wherein the capacitor cells are provided in plurality, the plurality of capacitor cells are arranged side by side in a first direction, and the first fiber-containing resin member is installed extending in the first direction and is arranged overlapping with the plurality of capacitor cells when viewed from the upper and lower directions. Claim 3 In paragraph 2, the first fiber-containing resin member is a capacitor device disposed between the first cover and the second cover. Claim 4 A capacitor device according to claim 2, further comprising a first reinforcement positioned on one side of a second direction orthogonal to the first direction of the capacitor cell, and wherein one end of the first fiber-containing resin member in the second direction is positioned to overlap with the first reinforcement when viewed from the upper and lower directions. Claim 5 A vehicle-mounted structure for a battery device having a battery device described in any one of claims 1 to 4, wherein the vehicle has a vehicle frame member extending in the vehicle width direction and arranged overlapping with the battery device when viewed from the vehicle's vertical direction, and the first fiber-containing resin member is arranged overlapping with the vehicle frame member when viewed from the vehicle's vertical direction. Claim 6 In claim 5, the above-described energy storage device further comprises an energy storage module comprising a plurality of the above-described energy storage cells, and the first fiber-containing resin member is installed extending from the end of the above-described energy storage module on the vehicle front side to the central part of the above-described energy storage module in the vehicle front-rear direction, the vehicle-mounted structure of the energy storage device. Claim 7 In claim 6, the above-mentioned battery device has a second reinforcement installed extending in the vehicle width direction, and the first fiber-containing resin member is installed extending from the vehicle front end of the battery module to the second reinforcement, forming a vehicle-mounted structure of the battery device. Claim 8 A capacitor device according to any one of claims 1 to 4, further comprising a second fiber-containing resin member that is in contact with either the first cover or the second cover and is arranged to overlap both the capacitor cell and the first fiber-containing resin member when viewed from the vertical direction.

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