JP2019083145A - Power storage device - Google Patents

Abstract

To provide a power storage device capable of improving reliability with a simple structure.SOLUTION: A power storage device 1 comprises: a power storage module 400 having one or more power storage element 40; and a housing 10 housing the power storage module 400. The housing 10 includes a convex part 210 formed by expanding one part of the housing 10 to an inner side. The convex part 210 is arranged at a position in contact from an upper direction to a case side wall part 412 of the power storage module 400.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a power storage device including a power storage module and a housing that houses the power storage module.

  2. Description of the Related Art Conventionally, a power storage device is known that includes a power storage module and a housing that houses the power storage module. For example, Patent Document 1 discloses a battery module assembly including a battery module, a base plate including a housing portion on which the battery module is mounted on the upper surface, and an upper cover plate coupled to the base plate via a bracket. There is.

Japanese Patent Application Publication No. 2016-508659

  In a power storage device including a housing that houses a power storage module, fixing the position of the power storage module in the housing is important, for example, from the viewpoint of improving the reliability of the power storage device. In this regard, in the conventional battery module assembly described above, the housing portion of the base plate is configured to support the battery module by contacting a predetermined area including the center of the battery module in plan view.

  However, in general, the central portion of the outer surface of the storage module has a relatively large area, and thus is a portion that is easily pressed while being structurally flexible. Therefore, it is difficult to say that it is appropriate as a part to be pressed for position control of the storage module. In addition, when the center portion of the outer surface of the storage module is held down, there is a possibility that unnecessary pressing force is applied to the storage element or the circuit board in the storage module.

  In addition, it is also conceivable to perform position regulation of the storage module in an appropriate manner, for example, by attaching a component in contact with the storage module in a housing. However, in this case, other problems such as an increase in the number of parts and complication of the structure of the power storage device may occur.

  The present invention has been made by the inventors of the present invention with a new focus on the above-mentioned problems, and an object of the present invention is to provide a power storage device capable of improving the reliability with a simple configuration.

  In order to achieve the above object, a power storage device according to one aspect of the present invention includes a power storage module having one or more power storage elements, and a housing for housing the power storage module, wherein the housing is the housing The protrusion has a convex portion formed by expanding inward, and the convex portion is disposed at a position where it abuts on the side wall portion of the storage module from above.

  According to this configuration, the convex portion provided in the housing abuts on the power storage module at a position that is relatively difficult to bend when pressed. Therefore, the pressing force on the storage module caused by the contact of the convex portion with the storage module efficiently acts as a force for position control of the storage module. That is, according to the convex part which concerns on this aspect, compared with the case where the center part of the electrical storage module in top view is pressed, for example, position control in the up-and-down direction is made more certainly. Further, since the convex portion is unlikely to bend the outer surface of the storage module, for example, the possibility of applying unnecessary pressing force to elements such as the storage element in the storage module is low. Furthermore, since the convex portion according to this aspect can be formed by, for example, pressing a part of a metal casing, the convex portion is formed at a position, a shape, or a size suitable for position control of the storage module. It is easy. Therefore, the power storage device according to this aspect is a power storage device capable of improving the reliability with a simple configuration.

  Further, in the power storage device according to one aspect of the present invention, a plurality of power storage modules including the power storage module are accommodated in the housing, and the convex portion is aligned among the plurality of power storage modules. It may be disposed at a position where it abuts on the two side wall portions adjacent to each other in the two power storage modules disposed from above.

  According to this configuration, the two power storage modules can be pressed from above by one convex portion provided in the housing. That is, the position restriction of the two power storage modules in the vertical direction can be performed with a simple configuration. Further, since the number of the convex portions provided in the housing corresponding to the two power storage modules may be one, for example, the manufacturing efficiency of the power storage device can be improved or the manufacturing cost can be suppressed.

  Further, in the power storage device according to the aspect of the present invention, the two power storage modules are a first power storage module and a second power storage module arranged side by side in a first direction, and the plurality of power storage modules are further And a third power storage module aligned in a second direction orthogonal to the first direction and at least one of the first power storage module and the second power storage module, wherein the convex portion is the first power storage module and the second power storage module. A position where the side walls adjacent to each other in the storage module abut from above and a position where the side walls adjacent to each other in the first storage module or the second storage module and the third storage module abut from above It may be located at

  According to this configuration, it is possible to press from above the three storage modules (first to third storage modules) arranged in an L-shape or a T-shape, for example, by one convex portion provided in the housing. . That is, the position restriction of the three power storage modules in the vertical direction can be performed with a simple configuration. In addition, since the number of the convex portions provided in the housing corresponding to the three power storage modules may be one, for example, the manufacturing efficiency of the power storage device can be improved or the manufacturing cost can be suppressed.

  Further, in the power storage device according to one aspect of the present invention, the housing includes a main body portion for housing the power storage module, and a lid body closing an opening of the main body portion, and the convex portion is attached to the lid body. It may be formed.

  According to this configuration, for example, when the opening of the main body portion is closed by the lid body, the lid body is fixed to the main body portion in a state where the convex portion presses the one or more storage modules (fastening by welding etc. Can) Therefore, for example, it is easy to form a state in which one or more storage modules are firmly pressed by the convex portion.

  Further, in the power storage device according to one aspect of the present invention, the convex portion is a first convex portion, and the housing is a second convex formed by bulging a part of the housing inward. It is also possible to have a second convex portion disposed at a position where the second convex portion is in contact with the other side wall portion different from the side wall portion of the storage module in contact with the first convex portion.

  According to this configuration, at least two convex portions abut on one storage module. In addition, since each of the two convex portions abuts the side walls different from each other in the storage module from above, for example, the storage module can be held in a well-balanced manner.

  Further, in the power storage device according to one aspect of the present invention, the housing is a bent piece portion provided by cutting and raising a part of a wall portion of the housing, and a side surface of the power storage module It may have a contacting piece.

  According to this configuration, for example, the storage module can be pressed from the side by a simple configuration in which a part of the wall portion of the housing is cut and raised. That is, the bent piece can function as a part for position regulation of one or more storage modules together with the convex part.

  Further, in the power storage device according to one aspect of the present invention, one or more power storage modules including the power storage module are accommodated in the housing, and from the bending piece portion of the one or more power storage modules The side of the farthest storage module far from the bent piece may be in contact with another wall of the housing intersecting with the wall.

  According to this configuration, for example, one or more power storage modules can be pressed in the direction of the other wall, so that, for example, the inner side surface of the housing formed by the other wall can be used for position control. That is, since a part of the role of position control in the lateral direction of one or more power storage modules can be carried by the inner side surface of the housing, the number of bending pieces for the position control can be reduced. it can. This is advantageous, for example, from the viewpoint of improving the manufacturing efficiency of the power storage device or suppressing the reduction in the strength of the housing.

  Further, in the power storage device according to one aspect of the present invention, the bent piece portion may have a wire holding portion that holds a wire electrically connected to the power storage module.

  According to this configuration, since the wiring is held by the wiring holding portion of the bent piece, no other member for holding the wiring is necessary. That is, the member for position control of the storage module can play a role of holding the wiring, which can simplify the configuration of the storage device, for example.

  Further, in the power storage device according to one aspect of the present invention, the bent piece portion includes at least a bottom wall portion forming a bottom surface of the housing, and an upper wall portion facing the bottom wall portion of the housing. It may be provided on one side.

  According to this configuration, the bent piece portion can, for example, press the mutually opposing end portions of the two storage modules in line from the side. In addition, for example, the bent piece portion can press the central portion of the upper end and the lower end of one storage module from the side. That is, the bent piece can hold one or more storage elements in a well-balanced manner.

  According to the present invention, it is possible to provide a power storage device capable of improving reliability with a simple configuration.

FIG. 1 is a perspective view showing an appearance of a power storage device according to an embodiment. It is a disassembled perspective view of the electrical storage apparatus which concerns on embodiment. It is a disassembled perspective view of the electrical storage module which concerns on embodiment. It is a perspective view which shows the example of the arrangement | positioning position of the convex part which the housing | casing which concerns on embodiment has. It is a 1st sectional view showing the contact position of the convex part concerning an embodiment, and an electrical storage module. It is a 2nd sectional view showing the contact position of the convex part concerning an embodiment, and an accumulation-of-electricity module. It is sectional drawing which shows the contact | abutting position of the convex part and two electrical storage modules which concern on embodiment. It is a perspective view which shows the example of the arrangement | positioning position of the bending piece part which the housing | casing which concerns on embodiment has. It is sectional drawing which shows the contact | abutting position of the bending piece part and storage module which concern on embodiment. It is a perspective view which shows an example of the shape of the bending piece part which concerns on embodiment. It is a top view which shows an example of the arrangement position of a convex part with which a case concerning modification 1 of an embodiment is provided. It is a top view which shows an example of the arrangement position of a plurality of convex parts with which a case concerning modification 1 of an embodiment is provided. It is a top view which shows an example of the arrangement position of a convex part with which a case concerning modification 2 of an embodiment is provided.

  Hereinafter, a power storage device according to an embodiment of the present invention and a modification thereof will be described with reference to the drawings. Note that the embodiment described below and the modifications thereof all show a comprehensive or specific example. The numerical values, shapes, materials, components, arrangement positions and connection forms of the components, manufacturing processes, order of manufacturing processes, etc. shown in the following embodiment and the modification thereof are merely examples, and the present invention is limited. is not. Further, among the components in the following embodiment and the variation thereof, components not described in the independent claim indicating the highest concept are described as optional components. Further, each drawing is a schematic view, and the dimensions and the like are not necessarily illustrated exactly.

  Further, in the following description and drawings, the direction in which the pair of electrode terminals of the storage element is lined up, or the opposite direction of the short side of the container is defined as the X-axis direction. Further, the opposing direction of the long side of the container, the lateral direction of the short side of the container, the thickness direction of the container, or the arranging direction of the storage elements in the storage module is defined as the Y-axis direction. In addition, the direction in which the main body portion and the lid body are aligned in the housing of the power storage device, the longitudinal direction of the short side surface of the storage element container, or the vertical direction is defined as the Z-axis direction. The X-axis direction, the Y-axis direction, and the Z-axis direction are directions intersecting with each other (orthogonal in the present embodiment). Although it may be considered that the Z-axis direction is not in the vertical direction depending on the mode of use, the Z-axis direction is hereinafter described as the vertical direction for the convenience of description. Further, in the following description, for example, the X axis direction plus side indicates the arrow direction side of the X axis, and the X axis direction minus side indicates the opposite side to the X axis direction plus side. The same applies to the Y-axis direction and the Z-axis direction.

Embodiment
[1. General Description of Storage Element]
First, general description of power storage device 1 in the present embodiment will be made using FIG. 1 and FIG. 2. FIG. 1 is a perspective view showing an appearance of a power storage device 1 according to the embodiment. FIG. 2 is an exploded perspective view of power storage device 1 according to the embodiment.

  The storage device 1 is a device capable of charging electricity from the outside and discharging electricity to the outside. For example, the power storage device 1 is used for a power storage application or a power supply application. Specifically, power storage device 1 according to the present embodiment is suitable as a stationary power supply device.

  As shown in FIGS. 1 and 2, the power storage device 1 includes a housing 10 and a power storage module 400 housed in the housing 10. In the present embodiment, four power storage modules 400 are housed in the housing 10, but it is sufficient if the housing 10 contains at least one power storage module 400. The configuration of the storage module 400 will be described later with reference to FIG.

  Housing 10 has a main body portion 100 forming a space capable of housing a plurality of power storage modules 400, and a lid 200 closing an upper opening 100a of main body portion 100. Body portion 100 includes bottom wall portion 101 forming a bottom surface on which a plurality of power storage modules 400 can be mounted, and lateral wall portions 102 and 104 and rear wall portions 103 erected from the edge of bottom wall portion 101. It has a front wall portion 105. Note that each of the lid 200, the lateral wall portions 102 and 104, the rear wall portion 103, and the front wall portion 105 is an example of a wall portion of a housing. Further, in FIG. 2, the front wall portion 105 is illustrated in a state of being separated from the main body portion 100. Further, in the present embodiment, the back wall portion 103 is provided with a plurality of vent holes 107. The plurality of vents 107 function as vents for ventilating between the inside and the outside of the housing 10 during normal use, and for example, gas from the storage element 40 (see FIG. 3 described later) included in the storage module 400 When the gas flows out, it also functions as a discharge hole for discharging the gas to the outside of the housing 10.

  Further, as shown in FIG. 2, the power storage device 1 includes a measurement substrate 81 and a main circuit substrate 82 inside the housing 10. In FIG. 2, illustration of components such as wiring for connecting the storage module 400 and the measurement substrate 81 or the main circuit substrate 82 is omitted.

  The lid 200 is a member that constitutes the upper wall portion of the housing 10, and is a rectangular and plate-like member that closes the upper opening 100a of the main body portion 100. That is, the upper opening 100 a of the main body 100 is closed by the lid 200 in a state in which the one or more storage modules 400, the measurement board 81, the main circuit board 82 and the like are arranged inside the main body 100. Also, in this state, the lid 200 is fixed to the main body 100 by, for example, a plurality of screws. In the present embodiment, the housing 10 is made of, for example, a metal material such as an aluminum alloy or iron.

  In the present embodiment, the housing 10 has a convex portion 210 which bulges inward of the housing 10, and bent pieces 120 and 220, and the convex portion 210 and the bent piece The positions of one or more storage modules 400 are regulated by each of 120 and 220. The detail of the convex part 210 and the bending piece parts 120 and 220 is later mentioned using FIGS.

  Measurement substrate 81 and main circuit substrate 82 are disposed between one or more power storage modules 400 housed in housing 10 and the wall of housing 10, and electrically connected to at least one power storage module 400. It is a connected substrate. The measurement board 81 measures the state of the one or more storage modules 400, and the main circuit board 82 controls the one or more storage modules 400 using, for example, the measurement result of the measurement board 81. Specifically, the main circuit board 82 is a board on which a main circuit component through which a large current flows is mounted, and is fixed to the inner surface of the lateral wall portion 104 of the housing 10. The measurement substrate 81 is a substrate on which peripheral circuit components through which a small current flows is mounted, and is fixed to the inner surface of the front wall portion 105 of the housing 10. As shown in FIG. 2, the measurement board 81 has a connector (such as a connector 81 a) to which an external signal line is connected, and the hole is provided in the front wall portion 105 (a connector hole 105 a And so on, and is disposed in the housing 10. Further, as shown in FIG. 2, the front wall portion 105 is provided with an external terminal 106 for charging and discharging of power between the power storage device 1 and an external device.

[2. Storage module]
Next, the outline of the configuration of the storage module 400 according to the present embodiment will be described using FIG. 3. FIG. 3 is an exploded perspective view of power storage module 400 according to the embodiment. In FIG. 3, illustration of bus bars and the like connecting between the storage elements 40 is omitted. Further, the storage module 400 may further include another member such as an inner lid disposed between the storage element 40 and the case lid 420, for example.

  As shown in FIG. 3, a storage module 400 according to the present embodiment includes one or more storage elements 40 and a module case 410 that houses the one or more storage elements 40. In the present embodiment, four storage elements 40 are arranged side by side in the Y-axis direction in module case 410.

  The module case 410 has a case main body 411 capable of accommodating one or more storage elements 40 and a case cover 420 for closing the upper opening of the case main body 411. The module case 410 is made of, for example, a resin material such as polypropylene (PP), polycarbonate (PC), polybutylene terephthalate (PBT), or ABS resin.

  After arranging one or more storage elements 40 and members such as a bus bar (not shown) inside the case body 411, the upper opening of the case body 411 is closed by the case cover 420, and in that state, the case cover 420 is the case It is fixed to the main body 411. As a fixing method, various methods such as fastening with screws or welding, adhesion, or the like may be employed.

  The storage element 40 is a secondary battery (unit cell) capable of charging and discharging electricity, more specifically, a non-aqueous electrolyte secondary battery such as a lithium ion secondary battery . The storage element 40 is not limited to the non-aqueous electrolyte secondary battery, and may be a secondary battery other than the non-aqueous electrolyte secondary battery, or may be a capacitor. The storage element 40 may be a primary battery that can use the stored electricity without charging by the user. In addition, the storage element 40 may be a battery using a solid electrolyte.

  The storage element 40 includes a positive electrode terminal 43 and a negative electrode terminal 44 disposed in a container. An electrode body, a positive electrode current collector, a negative electrode current collector, an electrolytic solution, and the like are disposed inside the container of the storage element 40, but the detailed description will be omitted.

  In the present embodiment, the four power storage devices 40 housed in module case 410 are arranged in the Y-axis direction with the long side surfaces orthogonal to the Y-axis direction, and are connected in series, for example, by bus bars not shown. There is. Further, in the present embodiment, for example, as shown in FIG. 2, four power storage modules 400 are arranged in the housing 10, and these four power storage modules 400 are connected in series by bus bars (not shown).

  Here, each of the four storage modules 400 can include up to four storage elements 40. Therefore, in power storage device 1 of the present embodiment, up to 16 power storage elements 40 can be connected in series. The number of storage elements 40 included in each storage module 400 may be appropriately changed according to, for example, the storage capacity or output voltage required of the storage device 1. Further, the connection form of the storage element 40 described above is an example, and for example, in the storage module 400, two sets of two storage elements 40 connected in parallel are formed, and these two sets are connected in series. May be

  In FIG. 3 etc., the case main body 411 has a shape in which no opening is present other than the upper opening, but for example, even if one or more openings (through holes) are formed in the side wall of the case main body 411 Good. Thereby, for example, the heat dissipation from the storage element 40 in the module case 410 is efficiently performed.

  The position of the storage module 400 configured in this way is restricted by a part of the housing 10 inside the housing 10. Specifically, as a factor for regulating the position of power storage module 400, housing 10 has a convex portion 210 that contacts power storage module 400 from above, and bent pieces 120 and 220 that contact power storage module 400 from the side. And. Hereinafter, elements, such as convex part 210 which case 10 has, are explained using Drawings 4-10.

[3. Convex part of case]
First, the convex part 210 which the housing | casing 10 which concerns on this Embodiment has is demonstrated using FIGS. 4-7. FIG. 4 is a perspective view showing an example of the arrangement position of the convex portion 210 of the housing 10 according to the embodiment. In FIG. 4, in order to distinguish each of the plurality of convex portions 210, each of the plurality of convex portions 210 is given a different reference numeral (210a to 210d). For example, the convex portion 210a in FIG. 4 is the convex portion 210 on the negative side in the Y axis direction in FIG.

  Further, in order to distinguish each of the plurality of storage modules 400, each of the plurality of storage modules 400 is given a different code (400a to 400d). Moreover, in order to clarify the position of the some convex part 210 and the bending piece part 220 which the housing | casing 10 has, the lid 200 is inclined and shown in figure. These matters also apply to FIG. 8 described later. Furthermore, in FIG. 4, the contact ranges of the convex portions 210 a to 210 d with respect to the plurality of power storage modules 400 are represented by dotted-line rectangles. For example, the contact range 430 in FIG. 4 indicates a range in which the convex portion 210a contacts the storage modules 400a and 400b.

  FIG. 5 is a first cross-sectional view showing a contact position between convex portion 210 and storage module 400 according to the embodiment. FIG. 6 is a sectional view showing convex part 210 according to the embodiment and storage module 400. It is a 2nd sectional view showing a contact position. Specifically, in FIG. 5, the cross section of the housing 10 and one storage module 400 in the XZ plane passing through the VV line of FIG. 1 is illustrated in a simplified manner. That is, in FIG. 5, a cross section parallel to the XZ plane which passes through the contact range 430 shown in FIG. 4 and passes through the convex portion 210 on the minus side in the Y-axis direction in FIG. Further, in FIG. 6, a cross section of the housing 10 in the YZ plane passing through the VI-VI line of FIG. 1 is simply illustrated. That is, in FIG. 6, a cross section parallel to the YZ plane passing through the contact range 430 shown in FIG. 4 and passing the convex portion 210 on the minus side in the Y-axis direction in FIG. 2 is shown. 5 and 6, focusing on one storage module 400 (the storage module 400a in FIG. 4), the storage module 400 and the convex portion 210 in contact with the storage module 400 (the protrusion 210a in FIG. 4) The positional relationship with is represented.

  As shown in FIGS. 4 to 6, in the present embodiment, the lid 200 provided in the housing 10 has a convex portion 210 that protrudes toward the storage module 400. The convex portion 210 is formed, for example, by pressing a metal plate which is a base material of the lid 200. That is, on the side opposite to the projecting direction of the convex portion 210 in the lid 200, a concave portion (dent) having a shape corresponding to the convex portion 210 is formed. Further, focusing on the correspondence between one convex portion 210 and one electric storage module 400, the convex portion 210 is in contact with the case side wall portion 412 of the electric storage module 400 from above. The case side wall portion 412 of the storage module 400 is an example of the side wall portion of the storage module, and in the present embodiment, is a portion that forms the side surface of the module case 410 of the storage module 400. Specifically, as shown in FIGS. 5 and 6, the case side wall portion 412 includes a side wall extending in the vertical direction of the case main body 411, and an end portion of the case lid portion 420 located above the side wall. It is formed of

  That is, power storage device 1 according to the present embodiment includes power storage module 400 having one or more power storage elements 40, and housing 10 for storing power storage module 400. Case 10 has a convex portion 210 formed by expanding a part of case 10 inward, and convex portion 210 is disposed at a position where it abuts on case side wall portion 412 of power storage module 400 from above. It is done.

  As described above, in the present embodiment, the convex portion 210 provided in the housing 10 abuts on a portion of the top surface of the module case 410 (upper surface of the case lid 420) where the case body 411 supports. That is, the convex portion 210 abuts on the storage module 400 at a position where it is relatively difficult to bend when pressed. Therefore, the pressing force on the storage module 400 generated by the contact of the convex portion 210 with the storage module 400 efficiently acts as a force for position control of the storage module 400. That is, according to the convex part 210 which concerns on this Embodiment, compared with the case where the center part of the electrical storage module 400 in top view is pressed, for example, position control in an up-down direction is made more reliably. Thereby, for example, the deterioration of the storage element 40 due to the storage module 400 vibrating up and down is suppressed. That is, assuming that the convex portion 210 does not exist, the storage module 400 vibrates in the vertical direction in the housing 10, for example, during transportation or use of the storage device 1 because the position restriction in the vertical direction is not performed. It is also conceivable. In this case, since the storage element 40 in the storage module 400 also vibrates in the vertical direction, a defect such as deterioration of a bonding portion between the electrode body in the storage element 40 and the current collector may occur. In this regard, in power storage device 1 according to the present embodiment, convex portion 210 abuts on a portion on power storage module 400 that does not easily bend, so that vertical movement of power storage module 400 is effectively suppressed. Deterioration of the storage element 40 in the storage module 400 is suppressed.

  Further, since the possibility of the convex portion 210 bending the outer surface of the storage module 400 is low, for example, the possibility of applying unnecessary pressing force to elements such as the storage element 40 in the storage module 400 is low. Furthermore, the convex part 210 which concerns on this aspect can be formed by pressing a part of metal case 10 into a press. Therefore, it is easy to form the convex portion 210 at a position, a shape, or a size suitable for position regulation of the storage module 400. Therefore, the power storage device 1 according to this aspect is a power storage device with improved reliability with a simple configuration.

  Note that “upper” in “abutment from above” refers to the direction opposite to the mounting surface (bottom wall portion 101) of the storage module 400 with the storage module 400 in the housing 10 interposed therebetween. In other words, in the housing 10, the direction from the bottom wall portion 101 to the lid 200 is "upper". That is, "upper" in "contact from above" may or may not coincide with vertically upward.

  Further, in the present embodiment, the arrangement position of the convex portion 210 can also be expressed as, for example, the convex portion 210 is arranged at a position to press the side wall of the module case 410 of the storage module 400 from above. . More specifically, in the present embodiment, the convex portion 210 is disposed at a position where the side wall of the module case 410 is pressed from above through the case lid 420.

  Further, in the present embodiment, the position of case sidewall 412 of power storage module 400 in top view corresponds to the peripheral portion of power storage module 400 in top view. Therefore, for example, the convex part 210 can also be expressed in the position which contact | abuts from the upper part on the upper end of the peripheral part of the electrical storage module 400 in top view.

  Here, in order to hold the storage module 400 housed in the housing 10 from above, a member separate from the housing 10 (for example, a resin member such as rubber) is used as the storage module 400 and the inner surface of the housing 10. It is also conceivable to put in between. However, in this case, for example, the problem of an increase in the number of parts constituting the power storage device 1 may occur, and a problem such as aged deterioration of the resin member may also occur. In this regard, since convex portion 210 according to the present embodiment is a portion integrally formed on housing 10, the problem of an increase in the number of parts due to power storage device 1 including convex portion 210 does not occur. . Moreover, the convex part 210 which is a part of case 10 which is metal is less likely to cause problems such as aged deterioration as compared with a resin member.

  In addition, for example, fixing the module case 410 to the bottom wall portion 101 of the housing 10 with a screw may be considered for position control of the storage module 400 in the housing 10. However, when the mounting portion having a screw hole is provided in the resin module case 410, a problem of stress concentration in the mounting portion may occur depending on, for example, the diameter of the screw or the thickness of the mounting portion. In this regard, since the convex portion 210 according to the present embodiment is basically configured to push the storage module 400 with a surface, a stress caused by the convex portion 210 abutting on the resin module case 410 Concentration problems are less likely to occur.

  In the present embodiment, as shown in FIG. 5 and FIG. 6, the convex portion 210 includes an abutment surface 211 that abuts on one or more storage modules 400, and a peripheral wall 212 provided around the abutment surface 211. Have. The peripheral wall portion 212 is a wall portion erected downward from the lid 200, and is a portion that is more difficult to bend (difficult to deform) than the contact surface portion 211 when pressed from below. Further, there are two places (Pa, Pb in FIG. 6) where the peripheral wall 212 surrounding the contact surface 211 is pressed against the case side wall 412 of the storage module 400, as can be seen from FIGS. 4 and 6, for example. In other words, convex portion 210 can stably press the top surface of power storage module 400 by surface contact by contact surface portion 211, and peripheral wall portion 212 firmly secures case sidewall portion 412 of power storage module 400 in two places. It can be held down.

  Further, in the present embodiment, as shown in FIG. 4, each of the four convex portions 210 a to 210 d is disposed at a position in contact with the two power storage modules 400. This will be described with reference to FIG. FIG. 7 is a cross-sectional view showing the contact position of the protrusion 210a according to the embodiment and the two power storage modules 400a and 400b. In addition, the position of the cross section conforms to FIG.

  Focusing on the convex portion 210a among the four convex portions 210a to 210d, for example, as shown in FIG. 7, the convex portion 210a abuts on the mutually adjacent portions of the storage module 400a and the storage module 400b from above. That is, the convex portion 210a abuts the case side wall portion 412 of the storage module 400a and the case side wall portion 412 of the storage module 400b facing the case side wall portion 412 from above.

  Thus, in the present embodiment, housing 10 accommodates a plurality of power storage modules 400, and convex portion 210a is formed of two power storage modules arranged side by side among the plurality of power storage modules 400. The two case side walls 412 a and 400 b adjacent to each other are arranged to abut on the upper side. In the present embodiment, similarly, each of the other three convex portions 210b to 210d is also in contact with the two case sidewall portions 412 adjacent to each other in the two power storage modules 400 arranged side by side from above. It is arranged.

  According to this configuration, the two power storage modules 400 can be pressed from above by one convex portion 210 provided in the housing 10. That is, the position restriction of the two power storage modules 400 in the vertical direction can be performed with a simple configuration. Further, since the number of the convex portions provided in the housing corresponding to the two power storage modules 400 may be one, for example, the manufacturing efficiency of the power storage device 1 can be improved or the manufacturing cost can be suppressed.

  Further, in the present embodiment, the convex portion 210 that is in contact with the power storage module 400 from above is provided on the lid 200 that constitutes a part of the housing 10. That is, the case 10 has the main body portion 100 (see FIG. 2) for housing the storage module 400 and the lid 200 for closing the upper opening 100 a of the main body portion 100, and the convex portion 210 is formed on the lid 200 It is done.

  According to this configuration, for example, when the upper opening 100a of the main body portion 100 is closed by the lid 200, the lid 200 is fixed to the main body portion 100 in a state where the convex portion 210 presses one or more storage modules 400. (Can be tightened or welded with screws etc.) That is, when the upper opening 100 a of the main body 100 is closed with the lid 200, the convex portion 210 provided on the lid 200 is brought close to the storage module 400 housed in the main body 100 from above. Therefore, for example, even when the height of the convex portion 210 (the length in the Z-axis direction from the inner surface of the lid 200) is relatively large, the convex portion 210 is pressed against the one or more storage modules 400. The lid 200 can be fixed to the main body 100. Therefore, in power storage device 1 according to the present embodiment, for example, it is easy to form a state in which one or more power storage modules 400 are firmly pressed by convex portion 210.

  Here, in the present embodiment, when focusing on one storage module 400, the two projections 210 are arranged in the storage module 400 such that the two projections 210 abut from above. . For example, as shown in FIG. 4, the convex portions 210 a and 210 c abut on the storage module 400 a from above. Further, the convex portion 210c is in contact with the other case side wall portion 412 different from the case side wall portion 412 (see, for example, FIG. 5) of the storage module 400a with which the convex portion 210a is in contact. In the present embodiment, convex portion 210a abuts from above on case sidewall portion 412 on the positive side in the X-axis direction of power storage module 400a, and convex on case sidewall portion 412 on the positive side of Y-axis direction of power storage module 400a from above The part 210c is in contact. In addition, one of the convex portions 210a and 210c is an example of a first convex portion, and the other is an example of a second convex portion.

  As described above, when each of the two convex portions 210 abuts the case sidewall portions 412 different from each other in one storage module 400 from above, for example, the storage module 400 can be held in a well-balanced manner.

  In addition, in FIG. 4, the convex part 210a and the convex part 210c are arrange | positioned in the position which contact | abuts to two continuous case side wall parts 412 which the electrical storage module 400a has from upper direction. However, the convex portion 210 a and the convex portion 210 c may be arranged to abut on each of the case side wall portions 412 of the storage module 400 facing each other from above. In addition, the number of the convex portions 210 in contact with one power storage module 400 from above may be three or more. Further, the plurality of convex portions 210 may abut on one case side wall portion 412 of the storage module 400 from above.

[4. Folding piece of housing]
Next, the bending piece parts 120 and 220 which the housing | casing 10 which concerns on this Embodiment has are demonstrated using FIGS. 8-10. FIG. 8 is a perspective view showing an example of the arrangement position of the bent piece portion 120 which the casing 10 according to the embodiment has. In FIG. 8, in order to distinguish each of the plurality of bent pieces 120, each of the plurality of bent pieces 120 is given a different reference numeral (120a to 120h). Further, in order to clarify the positions of the plurality of bent pieces 120, the main body 100 is illustrated in a state in which the portion including the lateral wall 104 is cut away and the front wall 105 is removed.

  FIG. 9 is a cross-sectional view showing the contact position of the bent piece portion 120 and the storage module 400 according to the embodiment. Specifically, in FIG. 9, the cross section of the housing 10 in the XZ plane passing through the line IX-IX in FIG. 8 is simply illustrated, and the side surfaces of the storage modules 400a and 400b are illustrated. FIG. 10 is a perspective view showing an example of the shape of the bent piece portion 120 according to the embodiment.

  Referring to FIGS. 8 and 9, focusing on the mounting surface (bottom wall portion 101) of storage module 400 in housing 10, housing 10 is a fold provided by cutting and raising a part of the wall of housing 10. The bending piece portion 120 has a bending piece portion 120 that abuts on the side surface of the storage module 400. Specifically, eight bent pieces 120 a to 120 h are formed on the bottom wall 101 of the main body 100 of the housing 10.

  Further, focusing on the top surface (the lid 200) of the storage space of the storage module 400 in the housing 10, the housing 10 is a bent piece 220 provided by cutting and raising a part of the wall of the housing 10. And has a bent piece 220 that abuts on the side surface of the storage module 400. Specifically, the four bent pieces 220 a to 220 d are formed on the lid 200 of the housing 10.

  Each of the bent pieces 120 a to 120 h contacts the lower side surface of the storage module 400, and each of the bent pieces 220 a to 220 d contacts the upper side surface of the storage module 400. That is, each of the bent pieces 120 and 220 can hold the storage module 400 from the side.

  That is, in power storage device 1 according to the present embodiment, power storage module 400 can be pressed from the side with a simple configuration in which a part of the wall portion of housing 10 is cut and raised. That is, the bent pieces 120 and 220 can regulate the position of the storage module 400 in the lateral direction (direction orthogonal to the Z axis) in the housing 10. Therefore, the bent piece portions 120 and 220 can function as a portion for position regulation of the one or more power storage modules 400 together with the convex portion 210. Further, in the present embodiment, since the bent pieces 120 and 220 are parts of the metal housing 10, the storage module 400 can be pressed with a relatively large elastic force.

  Further, in the present embodiment, bending piece portion 120 has inclined surface portion 121 (see FIGS. 9 and 10) which is inclined in a direction away from storage module 400 with which bending piece portion 120 abuts. There is. Therefore, when the storage module 400 is accommodated in the housing 10, the storage module 400 can be placed on the bottom wall portion 101 along the inclined surface portion 121. That is, in the storage operation of storage module 400 in housing 10, the front end of bending piece portion 120 is not easily caught by storage module 400, and the storage module in a state where storage module 400 is in contact with bending piece portion 120. 400 can be placed on the bottom wall 101. Similarly, the bent piece 220 also has an inclined surface 221 (see FIG. 9) inclined at a tip end in a direction away from the storage module 400 with which the bent piece 220 abuts. Therefore, when the upper opening 100 a of the housing 10 in which the storage module 400 is accommodated is closed by the lid 200, the tip of the bent piece 220 is less likely to be caught by the storage module 400. In addition, the lid 200 can be fixed to the main body 100 in a state in which the storage module 400 is in contact with the bent piece 220.

  Further, in the present embodiment, bending piece portion 120 is arranged so as to sandwich one or more power storage modules 400 using a wall portion of housing 10 in which bending piece portion 120 is not formed. There is. For example, as shown in FIG. 9, the bent piece 120 a is disposed at a position where the storage modules 400 a and 400 b can be pressed toward the lateral wall 102.

  That is, when focusing on the bent piece 120a, the housing 10 accommodates one or more power storage modules 400 (the power storage modules 400a and 400b in FIG. 9) including the power storage module 400a in contact with the bent piece 120a. ing. Further, the side of the storage module 400b farthest from the bending piece 120a of the one or more storage modules 400 is the bottom of the housing 10 on the side (plus side in the X-axis direction) far from the bending piece 120a. It abuts on another wall (lateral wall 102) intersecting the wall 101.

  According to this configuration, since one or more power storage modules 400 can be pressed in the direction of the lateral wall portion 102, for example, the inner side surface of the housing 10 formed by the lateral wall portion 102 can be used for position regulation. That is, part of the role of position control of the one or more power storage modules 400 in the lateral direction can be carried by the inner side surface (the lateral wall 102 in FIG. 9) of the housing, so bending for the position control The number of pieces 120 can be reduced. This is advantageous, for example, from the viewpoint of improving the manufacturing efficiency of the power storage device 1 or suppressing the reduction in the strength of the housing 10 or the like.

  In the present embodiment, for example, as can be seen from FIGS. 8 and 9, on the opposite side to the lateral wall portion 102 across the storage modules 400a and 400b, in addition to the bending piece 120a, the bending piece 120b and 220 d are arranged. That is, the bent piece portions 120b and 220d function as portions for restricting the position of the storage modules 400a and 400b in the X-axis direction using the lateral wall portion 102 in the same manner as the bent piece portion 120a.

  Further, as shown in FIG. 8, bent pieces 120d, 120c, and 220c are disposed at positions where position restriction of storage modules 400d and 400c in the X-axis direction can be performed using lateral wall 102. There is. The bent pieces 120e, 120f, and 220a are disposed at positions where the position restriction of the storage modules 400a and 400d in the Y-axis direction can be performed using the rear wall 103. The bent pieces 120g, 120h, and 220b are disposed at positions where the position restriction of the storage modules 400b and 400c in the Y-axis direction can be performed using the rear wall 103.

  As described above, in the present embodiment, when focusing on the bottom wall portion 101 of the housing 10, the bottom wall portion 101 has a plurality of bent pieces 120, and among the plurality of bent pieces 120, The direction (pressing direction) of one or more bending pieces 120 intersects the direction (pressing direction) of the other one or more bending pieces 120. Thereby, a two-dimensional position restriction on one or more power storage modules 400 by the plurality of bent pieces 120 and the inner side surface (the lateral wall 102 or the rear wall 103 in the present embodiment) of the housing 10 Is done properly.

  Further, in the present embodiment, the lid 200 is similarly provided with a plurality of bent pieces 220 whose directions cross each other, and even with the plurality of bent pieces 220, one or more power storage modules are provided. Two-dimensional position control for 400 is appropriately performed.

  Furthermore, two-dimensional position regulation of the one or more storage modules 400 is appropriately performed by the plurality of bent pieces 120 and 200, so that the space other than the storage space of the one or more storage modules 400 in the housing 10 can be obtained. Space can be used effectively.

  Specifically, in the present embodiment, each of the plurality of bending piece portions 120 and the plurality of bending piece portions 220 is a space in housing 10 and a space for housing four power storage modules 400. Are laid out so as to separate from other spaces (see, for example, FIGS. 2 and 8). More specifically, the storage module group including the four storage modules 400 is positionally restricted by the plurality of bending pieces 120 and 220, so that the X axis direction plus side and the Y axis direction plus in the housing 10. It is put in the corner of the side. Another L-shaped space obtained by this is used as a housing space for the substrate (the measurement substrate 81 and the main circuit substrate 82).

  Further, in the present embodiment, as shown in FIG. 10, the bent piece portion 120 includes the wire holding portion 125 for holding the wire 90 electrically connected to the storage module 400. Specifically, in the present embodiment, the portion where the through hole is formed in the inclined surface portion 121 of the bent piece portion 120 functions as the wiring holding portion 125.

  According to this configuration, since the wiring 90 is held by the wiring holding portion 125 of the bent piece portion 120, no other member for holding the wiring 90 is required. That is, the member for position control of the storage module 400 can play the role of holding the wiring 90, whereby, for example, the configuration of the storage device 1 can be simplified. In addition, the inclined surface portion 121 where the wire holding portion 125 is disposed is a portion inclined in a direction away from the storage module 400 with which the bent piece portion 120 abuts. Therefore, for example, even when the bent piece 120 is in contact with the storage module 400, the wiring 90 can be easily attached to the wiring holding portion 125.

  Note that the wiring holding portion 125 is not necessarily realized by the through hole, and the wiring holding portion 125 may be realized by, for example, a notch or a claw provided in the bent piece portion 120. Further, in FIG. 10, the wiring 90 is held in the wiring holding portion 125 by penetrating the wiring 90 in the wiring holding portion 125, but the manner of holding the wiring 90 by the wiring holding portion 125 is limited to this. Absent. For example, in a state in which the binding band passes through the wire holding portion 125, the plurality of wires 90 may be bound by the binding band. Thereby, it is possible to hold | maintain the several wiring 90 by the wiring holding | maintenance part 125 which has a through-hole of the magnitude | size of one binding band, for example.

  In addition, the housing 10 may include only one of the bent pieces 120 and 220. That is, the bent piece is provided on at least one of the bottom wall 101 forming the bottom of the housing 10 and the upper wall (lid 200) facing the bottom wall 101 of the housing 10. In this case, lateral position regulation of the storage module 400 is possible.

  Also, for example, the bent pieces 120 or 220 may abut on the side surfaces of the two power storage modules 400. For example, by arranging the bent piece 120 on the negative side in the X-axis direction of the boundary between the storage modules 400a and 400d shown in FIG. 8, the bent piece 120 can move the end of the storage modules 400a and 400d in the X axis direction It can be pressed on the plus side (that is, in the direction of the side wall 102).

  Also, for example, a bent piece may be formed in the lateral wall portion 102 of the housing 10. For example, a bent piece is provided at a position in contact with the side surface on the negative side in the Y-axis direction of the storage module 400b in FIG. Thereby, the position regulation of the storage modules 400 b and 400 c in the Y-axis direction can be performed by the bent pieces provided in the lateral wall 102.

  Further, in the case of arranging the bending piece portion 120 with respect to one storage module 400, for example, the bending piece portion 120 is lateral to the case side wall portion 412 different from the case side wall portion 412 where the convex portion 210 contacts from above. It is preferable to arrange the bent piece 120 so as to come into contact with the seat. Thereby, for example, the overall position regulation of the storage module 400 is efficiently performed by the combination of the convex portion 210 and the bending piece portion 120. That is, in the lower end of the case side wall portion 412 where the convex portion 210 abuts from above, the static friction force with the bottom wall portion 101 is improved by the pressing force from the convex portion 210, whereby the lateral direction of the storage module 400 is obtained. The effect of position control is also obtained. Therefore, by disposing the bent piece portion 120 at a position where the convex portion 210 abuts against the case side wall portion 412 which is not in contact from above, the overall position regulation of the storage module 400 is performed more efficiently. The effect of the positional relationship between the convex portion 210 and the bending piece portion 120 is also applied to the combination of the convex portion 210 and the bending piece portion 220.

  As mentioned above, although the electrical storage apparatus 1 which concerns on embodiment was demonstrated, the electrical storage apparatus 1 may have a convex part of an aspect different from the aspect shown, for example in FIGS. 4-7. So, the modification about the convex part in the electrical storage apparatus 1 is demonstrated below focusing on the difference with the said embodiment.

(Modification 1)
FIG. 11 is a plan view showing an example of the arrangement position of the convex portion 210 provided in the housing 10a according to the first modification of the embodiment. In FIG. 11, in order to clarify the position of the convex portion 210 with respect to the plurality of power storage modules 400, the outer shape of the housing 10a is illustrated by a broken line, and the lid 200 of the housing 10a has the convex portion 210. Only illustrated. Moreover, the convex part 210 represents the rough shape in planar view by the area | region which attached the oblique line. Further, thick dotted lines in the storage module 400 indicate the positions of the case side wall portions 412 described below, and in order to distinguish the plurality of case side wall portions 412, each of the plurality of case side wall portions 412 , Different from each other (such as 412a and 412ba). These matters also apply to FIGS. 12 and 13 described later.

  As shown in FIG. 11, in the present modification, the convex portion 210 is disposed at a position in contact with the four power storage modules 400 from above. That is, the convex part 210 which concerns on this modification is arrange | positioned in the position which can hold down the three or more electrical storage modules 400 arrange | positioned two-dimensionally along with a package.

  Specifically, when focusing on the storage modules 400a, 400b and 400c among the four storage modules 400 included in the storage device 1 according to the present modification, the storage device 1 shown in FIG. 11 is described as follows. Ru.

  The storage modules 400a and 400b are disposed side by side in the X-axis direction, and the storage modules 400c are disposed side by side with the storage module 400b in the Y-axis direction. Convex portion 210 is a position which abuts from above on the case side wall portions (case side wall portions 412a and 412ba in FIG. 11) adjacent to each other in power storage modules 400a and 400b, and adjacent to each other in power storage modules 400b and 400c. The side wall portions (the case side wall portions 412 bc and 412 c in FIG. 11) are disposed in contact with the side wall portions from above. In the present modification, the storage module 400a is an example of a first storage module, the storage module 400b is an example of a second storage module, and the storage module 400c is an example of a third storage module. The X-axis direction is an example of a first direction, and the Y-axis direction is an example of a second direction orthogonal to the first direction.

  According to this configuration, the three storage modules 400 arranged in an L-shape can be pressed from above by one convex portion 210 provided in the housing 10a. That is, the position restriction of the at least three power storage modules 400 in the vertical direction can be performed with a simple configuration. Further, since the number of the convex portions provided in the housing 10a corresponding to the three power storage modules 400 may be one, for example, the manufacturing efficiency of the power storage device 1 can be improved or the manufacturing cost can be suppressed. Further, in the present modification, the convex portion 210 contacts the storage module 400d adjacent to the storage modules 400a and 400c from above in addition to the storage modules 400a to 400c. Specifically, the convex portion 210 is disposed at the central portion of the storage module group including the storage modules 400 a to 400 d arranged in a matrix in a plan view. Thus, the convex portion 210 can function as a portion for position regulation in the vertical direction with respect to each of the storage modules 400a to 400d.

  The housing 10 a may further have one or more convex portions 210 as shown in FIG. 12, for example. FIG. 12 is a plan view showing an example of the arrangement position of the plurality of convex portions 210 provided in the housing 10a according to the first modification of the embodiment.

  For example, as shown in FIG. 12, a convex portion 210 is disposed at the central portion of a storage module group including storage modules 400a to 400d arranged in a matrix in plan view, and further, case sidewall portions of each of storage modules 400a to 400d. Another convex portion 210 that abuts from above on 412 may be disposed.

  Accordingly, position regulation in the vertical direction can be performed in a well-balanced manner with respect to the four power storage modules 400a to 400d. Further, in the example illustrated in FIG. 12, each of the four power storage modules 400 a to 400 d is pressed by the three convex portions 210. Therefore, position control in the vertical direction is performed in a well-balanced manner also in each of the four power storage modules 400a to 400d.

  For example, the number and layout of the convex portions 210 arranged at positions other than the central portion of the storage module group in plan view are, for example, the number, size, weight, shape, and the like of the storage modules 400 accommodated in the housing 10a. It may be determined appropriately according to the layout and the like.

(Modification 2)
FIG. 13 is a plan view showing an example of the arrangement position of the convex portion 210 provided in the case 10b according to the second modification of the embodiment. The convex part 210 which concerns on this modification is arrange | positioned in the position which can hold down three storage modules 400 arrange | positioned two-dimensionally along with a package collectively. This point is common to the first modification.

  However, in the case 10b according to the present modification, the convex portion 210 is disposed in a region straddling the T-shaped boundary between the storage modules 400 formed by the three storage modules 400 arranged in a T-shape. The second embodiment differs from the first modification in that In this case, power storage device 1 according to the present modification is described, for example, as follows.

  The storage modules 400b and 400c are arranged side by side in the Y-axis direction, and the storage modules 400a are arranged side by side with the storage modules 400b and 400c in the X-axis direction. Convex portion 210 abuts from above the case side wall portions (case side wall portions 412bc and 412cb in FIG. 13) adjacent to each other in power storage modules 400b and 400c from each other, and also adjacent case side wall portions in power storage modules 400c and 400a (FIG. In 13, it is arrange | positioned in the position contact | abutted to case side wall part 412ca and 412a). Further, in the present modification, the convex portion 210 is also in contact with the case side wall portions (the case side wall portions 412a and 412ba in FIG. 13) adjacent to each other in the storage modules 400a and 400b from above.

  In the present modification, the storage module 400b is an example of a first storage module, the storage module 400c is an example of a second storage module, and the storage module 400a is an example of a third storage module. The Y-axis direction is an example of a first direction, and the X-axis direction is an example of a second direction orthogonal to the first direction.

  According to this configuration, the three power storage modules 400 arranged in a T-shape can be pressed from above by one convex portion 210 provided in the housing 10a. That is, the position restriction of the at least three power storage modules 400 in the vertical direction can be performed with a simple configuration. Further, since the number of the convex portions provided in the housing 10a corresponding to the three power storage modules 400 may be one, for example, the manufacturing efficiency of the power storage device 1 can be improved or the manufacturing cost can be suppressed.

  The housing 10b according to the present modification may further include a plurality of convex portions 210 that abut on each of the plurality of power storage modules 400, as in the housing 10a according to the first modification, for example. Further, the number and the layout of the plurality of convex portions 210 may be appropriately determined according to, for example, the number, the size, the weight, the shape, the layout, and the like of the storage modules 400 housed in the housing 10b.

(Other embodiments)
In the above, the electrical storage apparatus which concerns on this invention was demonstrated based on embodiment and its modification. However, the present invention is not limited to the above embodiment and modifications. Without departing from the spirit of the present invention, various modifications that can be conceived by those skilled in the art may be applied to the above embodiment or modification, or a form constructed by combining a plurality of components described above will be the present invention. Included in the scope of

  For example, in the embodiment, the shape of the protrusion 210 in a plan view is rectangular, but the shape of the protrusion 210 in a plan view is not limited to a rectangle. The shape of the convex portion 210 in a plan view may adopt various shapes such as, for example, a polygon other than a rectangle, a circle, an oval, an ellipse, and a combination thereof. That is, the shape, the size, and the position of the convex portion 210 in the housing 10 may be appropriately determined according to the number, the size, the shape, the layout, and the like of the power storage modules 400 to be pressed by the convex portion 210.

  In the embodiment, the shape of the storage module 400 is, for example, a substantially rectangular parallelepiped as shown in FIGS. 2 and 3, but the shape of the storage module 400 is not limited to a substantially rectangular parallelepiped, for example It may be a cylindrical shape or a prismatic shape other than a rectangular parallelepiped. In any case, since the storage module 400 has the case sidewall extending in the vertical direction, the convex part 210 is disposed at the position where it abuts from above the case sidewall, the upper and lower sides of the storage module 400 Directional position control is properly made.

  Moreover, it is not essential that the plurality of storage modules included in the storage device 1 have the same size or shape in all the storage modules, for example. For example, among the plurality of storage modules, there may be a storage module whose height is shorter than the others (the width in the Z-axis direction is shorter). In this case, by making the height (the amount of protrusion in the Z-axis direction) of the convex that abuts the storage module with a short height from above with respect to the other projections, the convex can be made into a storage module with a low short It can be made to abut.

  Further, the number of power storage modules 400 provided in power storage device 1 may be one or more, for example, even if power storage module 400 provided in power storage device 1 is determined according to the storage capacity or output voltage required for power storage device 1. Good. In addition, even when the number of power storage modules 400 to be included in the power storage device 1 is changed, the housing 10 in which the convex portions 210 and the like are formed at positions corresponding to the number of power storage modules 400 is manufactured. The new power storage device 1 can be manufactured without changing the size of the housing 10. That is, for example, it is relatively easy to manufacture a plurality of power storage devices 1 having the same size of the housing 10 and including different numbers of power storage modules 400 from each other.

  The various supplementary items of the power storage device 1 according to the embodiment described above may be applied to the power storage device 1 according to the first or second modification.

  The present invention is applicable to a power storage device and the like provided with one or more power storage modules.

DESCRIPTION OF SYMBOLS 1 electrical storage apparatus 10, 10a, 10b housing | casing 40 electrical storage element 43 positive electrode terminal 44 negative electrode terminal 81 measurement board | substrate connector 81a
82 main circuit board 90 wiring 100 main body 100a upper opening 101 bottom wall 102, 104 lateral wall 103 rear wall 105 front wall 105 a connector hole external terminal 106
Vent 107
120, 120a to 120h, 220, 220a to 220d bent pieces 121, 221 inclined surface portions 125, wiring holding portions 200, lids 210, 210a, 210b, 210c, 210d convex portions 211, abutting surfaces 212, peripheral wall portions 400, 400a, 400b , 400c, 400d Storage Module 410 Module Case 411 Case Body 412, 412a, 412ba, 412bc, 412ca, 412cb Case Side Wall 420 Case Lid 430 Contact Range

Claims (9)

A storage module having one or more storage elements;
And a case for housing the storage module.
The housing has a convex portion formed by bulging a part of the housing inward,
The said convex part is arrange | positioned in the position contact | abutted from the upper side to the side wall part of the said electrical storage module. The housing accommodates a plurality of storage modules including the storage module,
The power storage device according to claim 1, wherein the convex portion is disposed at a position where it abuts on two side wall portions adjacent to each other in two power storage modules arranged side by side among the plurality of power storage modules from above. The two storage modules are a first storage module and a second storage module arranged side by side in a first direction,
The plurality of storage modules are further
And at least one of the first storage module and the second storage module, and a third storage module aligned in a second direction orthogonal to the first direction,
The convex portion is a position that abuts on the side wall portions adjacent to each other in the first storage module and the second storage module from above, and the first storage module or the second storage module, and the third The power storage device according to claim 2, wherein the power storage device is disposed at a position where the side wall portions adjacent to each other in the power storage module are in contact from above. The housing has a main body portion for accommodating the storage module, and a lid for closing the opening of the main body portion.
The power storage device according to any one of claims 1 to 3, wherein the convex portion is formed on the lid. The convex portion is a first convex portion,
The housing is a second convex portion formed by a part of the housing bulging inward, and the side wall portion of the storage module with which the first convex portion is in contact The power storage device according to any one of claims 1 to 4, further comprising a second convex portion disposed at a position where the second side wall portion is in contact with the different side wall portion from above. The housing further includes a bent piece provided by cutting and raising a part of a wall of the housing, the bent piece being in contact with a side surface of the storage module. The power storage device according to any one of the preceding claims. The housing accommodates one or more storage modules including the storage module,
The side of the storage module farthest from the bent piece of the one or more storage modules, the side remote from the bent piece contacts the other wall of the housing that intersects the wall The power storage device according to claim 6 being in contact. The power storage device according to claim 6, wherein the bent piece portion includes a wire holding portion that holds a wire electrically connected to the power storage module. The bent piece portion is provided on at least one of a bottom wall portion forming a bottom surface of the housing and an upper wall portion facing the bottom wall portion of the housing. A power storage device according to any one of the preceding claims.

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