JP2022153092A - Power storage device - Google Patents

Abstract

To provide a power storage device which can inhibit ingress of water into a housing of a battery replacement device during rainy weather without providing a door and adjust a temperature in a storage slot of the battery replacement device.SOLUTION: A power storage device 1 includes: housings 24, 26, 41 which house a power storage part; an extension part 46 which is provided so as to extend from a surface oriented to the outside of the housing 26 and has elasticity. The extension part 46 is provided in an annular shape separately from the housings 26, 41 and disposed fitting in the surface of the housing 26.SELECTED DRAWING: Figure 8

Description

The present invention relates to capacitors.

BACKGROUND ART Conventionally, a battery pack is known as a power storage device that is detachably mounted on an electric vehicle or the like. A battery pack is used by being inserted into a battery case of an electric vehicle (see Patent Document 1, for example). Also, there is known a battery exchange device that constitutes a charging station for charging a battery pack (see, for example, Patent Document 2). The battery pack removed from the electric vehicle is inserted into the storage slot of the charging station and charged.

JP 2013-208962 A JP-A-2000-339538

A door is provided at the opening of the storage slot for storing the battery pack in the battery exchange device described above. If the battery exchange device is installed outdoors, the inside of the housing of the battery exchange device may be exposed to water when it is used in rainy weather. It is possible to suppress water exposure.

Further, when the battery pack has a structure including a lithium ion battery, exposure to high environmental temperatures may accelerate deterioration of the lithium ion battery. For this reason, it is preferable that the battery pack is managed at an appropriate temperature within the housing of the battery exchange device, because it leads to extension of the battery life. It is considered to be a useful means.

On the other hand, a user who replaces battery packs is expected to carry out the replacement operation after bringing multiple battery packs in at a time when it is necessary to replace a plurality of battery packs. At that time, the door is not preferable because it interferes with the insertion of the battery pack into the storage slot and the replacement work of the battery pack.

The present invention provides an electric storage device that can prevent water from entering the housing of a battery exchange device in the event of rain without providing a door, and that can regulate the temperature inside a storage slot of the battery exchange device. intended to provide

In order to achieve the above object, the present invention provides a housing (for example, a bottom case 24, a side case 26, and a top cover 41, which will be described later) that houses a power storage unit, and a battery that extends from the surface facing the outside of the housing. and an elastic extension (for example, a seal ring 46 to be described later).

As a result, it becomes possible for the elastic extending portion to seal the opening of the accommodating portion for accommodating the electric storage device, so that the electric storage device can be accommodated during rainy weather without a door provided at the opening of the accommodating portion. It is possible to suppress the water from entering the inside of the accommodating portion. In addition, it is possible to control the electric storage device by adjusting the temperature to an appropriate temperature in the accommodating portion sealed by the extending portion.

In this case, it is preferable that the extending portion is provided in an annular shape separately from the housing, and is fitted to the surface of the housing. This makes it possible to easily provide the extending portion on the housing.

In this case, the extending portion is provided in an annular shape separately from the housing, the housing is composed of at least two members in the extending direction of the electric storage device, and the extending portion includes two members. It is preferable to be sandwiched between the members (for example, a side case 26 and a top cover 41 to be described later). As a result, it is possible to easily provide the extending portion on the housing with two members.

In this case, the housing has a gripping portion (for example, a handle to be described later) for gripping the electric storage device on an end face in the extending direction of one of the two members (for example, a top cover 41 to be described later). 42). This makes it possible to arrange the extending portion in the vicinity of the holding portion.

In this case, it is preferable that a space for facilitating deformation of the extension is formed in the extension. As a result, the extension can be sufficiently deformed to reliably secure a seal between the extension and the contact portion.

In this case, the electric power device (for example, a battery exchange device 100 described later) electrically connected to the capacitor is provided in a removably insertable manner in a housing portion (for example, a housing portion 110 to be described later), and the extending portion A closed space (for example, It is preferably provided so as to form a closed space 113), which will be described later.

As a result, since a closed space is formed, it is possible to easily adjust the temperature to an appropriate temperature in the container containing the capacitor sealed by the extending portion, and it is possible to facilitate the management of the capacitor. becomes.

In this case, the extending portion is preferably arranged at a position on the opening side of the storage portion when the storage device is stored in the storage portion, rather than at a middle position in the extending direction of the storage device. . As a result, more than half of the electric storage device can be accommodated in the storage section, and the temperature can be easily adjusted to an appropriate temperature in the storage section of the storage device.

In this case, the accommodating portion is provided so that the opening of the accommodating portion is positioned near the extending portion of the electric storage device accommodated in the accommodating portion, and the abutting portion contacts the end portion of the extending portion. It is preferable to have a portion (for example, flange portions 111 and 111B described later). As a result, since the extension portion can seal the opening of the housing portion, it is possible to prevent water from entering the inside of the housing of the electric power device during rainy weather.

In this case, it is preferable that the contact portion can contact an end surface of the extension portion on the side of the insertion direction of the electric storage device into the accommodation portion. As a result, when the electric storage device is inserted into the housing portion, the extending portion easily comes into contact with the contact portion, and a seal between the extending portion and the contact portion can be easily ensured.

In this case, the contact portion (for example, the flange portion 111 described later) can contact the extending end of the extending portion in the extending direction (for example, the semicircular tip portion 4635B described later). preferable. This makes it possible to stably secure the seal between the contact portion and the extending portion regardless of the state of insertion of the capacitor.

In this case, it is preferable that the electric storage device is inserted into the accommodating portion in such a positional relationship that the extending direction of the electric storage device is oriented obliquely downward. As a result, although the accommodating portion is likely to be exposed to water during rainy weather, the sealing between the extending portion and the abutting portion can suppress the exposure to water.

In this case, the storage device (for example, a battery pack 1B described later) is a storage unit (for example, a storage unit 110B described below) of another power device that is different from the power device (eg, a battery exchange device 100 described below). It is preferable that the extending portion (for example, a seal ring 46B, which will be described later) is provided so as to contact the other accommodating portion when inserted into the other accommodating portion. As a result, it is possible to store the electric storage device having the extending portion in contact with the abutment portion in both the storage portion and the other storage portion.

In this case, the extending portion (for example, a seal ring 46 described later) does not contact the other accommodating portion (for example, an accommodating portion 110F described below) when inserted into the other accommodating portion. It is preferable that the other accommodating portion is provided so as to abut on the housing (for example, a side case 26 to be described later). As a result, it is possible to stably support the electric storage device even in the accommodating portion, and the durability of the extending portion is improved by preventing the extending portion from abutting when the seal is unnecessary. becomes possible.

According to the present invention, it is possible to prevent the inside of the housing of the battery exchange device from being exposed to water during rainy weather without providing a door, and it is possible to adjust the temperature inside the storage slot of the battery exchange device. A capacitor can be provided.

1 is a perspective view showing a battery pack, which is an electric storage device according to a first embodiment of the present invention; FIG. 1 is a bottom perspective view showing a battery pack, which is an electric storage device according to a first embodiment of the present invention; FIG. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view showing a battery pack, which is an electric storage device according to a first embodiment of the present invention; FIG. 2 is an enlarged cross-sectional view showing a portion provided with a seal ring of the battery pack, which is the electric storage device according to the first embodiment of the present invention; 1 is a front view showing a battery exchange device into which a battery pack, which is a storage device according to a first embodiment of the present invention, is inserted; FIG. 1 is a side explanatory view showing a battery exchange device into which a battery pack, which is a storage device, is inserted as a first embodiment of the present invention; FIG. FIG. 4 is a diagram illustrating a seal ring of the battery pack, which is the electric storage device according to the first embodiment of the present invention; FIG. 4 is a diagram illustrating how a battery pack, which is a storage device according to the first embodiment of the present invention, is inserted into a housing portion of a battery exchange device; FIG. 10 is a diagram illustrating a seal ring of a battery pack, which is an electric storage device according to a second embodiment of the present invention; FIG. 10 is a diagram illustrating how a battery pack, which is a storage device according to a second embodiment of the present invention, is inserted into a housing portion of a battery exchange device; FIG. 10 is a diagram illustrating a seal ring of a battery pack, which is an electric storage device according to a third embodiment of the present invention; FIG. 11 is a diagram illustrating a state in which a battery pack, which is a storage device according to a third embodiment of the present invention, is inserted into another housing; FIG. 11 is an explanatory diagram illustrating a seal ring of a battery pack, which is an electric storage device according to a fourth embodiment of the present invention; FIG. 11 is an explanatory diagram for explaining a seal ring of a battery pack, which is an electric storage device according to a fifth embodiment of the present invention; FIG. 11 is an explanatory diagram illustrating a seal ring of a battery pack, which is an electric storage device according to a sixth embodiment of the present invention; FIG. 4 is a diagram illustrating how a battery pack, which is a storage device according to the first embodiment of the present invention, is inserted into a housing portion of another battery exchange device;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a perspective view showing a battery pack 1. FIG. FIG. 2 is a bottom perspective view of the battery pack 1. FIG. FIG. 3 is an exploded perspective view showing the battery pack 1. FIG. FIG. 4 is an enlarged cross-sectional view showing a portion of the battery pack 1 where the seal ring 46 is provided. Hereinafter, the upper side (the side on which the handle 42 is provided) shown in FIG. 1 is defined as the upper side, and the opposite side (the lower side shown in FIG. 1) is defined as the lower side.

The portable battery pack 1 as a storage device is suitably applied to, for example, a power-assisted bicycle, a portable drive power source (MPP) detachably mounted on an electric motorcycle, or the like.
A battery pack 1 as an electric storage device includes a storage battery case 10 that forms an approximately rectangular parallelepiped exterior body, and a battery group that is housed inside the storage battery case 10 and serves as an electric storage unit. The external shape of the battery pack 1 is a rectangular parallelepiped, and when viewed in the direction in which the battery pack 1 extends, the battery pack 1 is formed in a substantially rectangular shape having four vertices and four sides connecting the vertices.

The storage battery case 10 constitutes a housing and accommodates a battery core pack constituting a battery group. The storage battery case 10 can be made of, for example, metal such as aluminum, resin (including fiber-reinforced resin), or the like. The storage battery case 10 has a bottom case 24 , a side case 26 , a handle body 43 , a handle cover 44 and a top cover 41 including a base plate 45 .

The bottom case 24 is configured separately from a battery group (not shown), is arranged outside the battery group and below the battery group, has an open upper end, and has a rectangular shape in plan view. there is A female connector portion 33 and the like are accommodated inside the bottom case 24 .

The connector portion 33 is exposed to the outside of the storage battery case 10 through, for example, a through hole (not shown) formed in the bottom wall of the bottom case 24, and is connected to a male connector portion of an electric vehicle or a charging device described later. It is electrically connectable to the male connector portion. By electrically connecting the female connector portion 33 to the male connector portion, the battery pack 1 and the electric vehicle or the charging device are electrically connected so that electric power can be transferred.

The female connector portion and the male connector portion may have a signal transmission path through which control signals and the like flow, in addition to a power transmission path through which electric power flows. In this case, the female connector portion 33 is electrically connected to the male connector portion, whereby the battery pack 1 and the electric vehicle or charging device are electrically connected so that signals can be exchanged.

The side case 26 (see FIG. 1) has a rectangular tubular shape and covers the side surface of the battery group. The upper end of the side case 26 opens upward at the upper opening 26a, and the lower end of the side case 26 opens downward at the lower opening 26b. With the lower opening 26b covered by the bottom case 24 and the upper opening 26a covered by the base plate 45, the internal space of the side case 26 accommodates a battery group (not shown), a BMU (not shown), and the like.

Between the base plate 45 and the side case 26, an annular seal ring 46, which is separate from the base plate 45 and the side case 26, is arranged so as to be fitted on a side surface 261, which is the surface of the side case 26, and is provided with an upper opening. It is provided over the entire circumference of the portion 26a. Accordingly, the seal ring 46 is arranged at a position on the opening side of the insertion hole of the accommodation portion 110 when the battery pack 1 is accommodated in the accommodation portion 110 described below, rather than the middle position in the extending direction of the battery pack 1 . be done. A seal ring (not shown) is also provided along the entire circumference between the bottom case 24 and the side case 26 .

The seal ring 46 is made of an elastic rubber material, resin material, or the like, and as shown in FIG. ing. The upwardly extending portion 462 has a male threaded portion threaded on its outer peripheral surface and is screwed into a female threaded portion formed on the inner peripheral surface of the upper opening 26 a of the side case 26 . Further, the upwardly extending portion 462 is sandwiched between the side case 26 and the base plate 45 in the horizontal direction while being screwed together.

The horizontal extending portion 463 extends horizontally from the upper end portion of the upward extending portion 462 and extends outside the battery pack 1 from the peripheral edge 455 (see FIG. 3) of the base plate 45 (see FIG. 3). , extending outside the battery pack 1 from the side surface 261 (see FIG. 3) which is the surface of the battery pack 1. As shown in FIG. The horizontal extending portion 463 has a lower end surface 4631, an upper end surface 4632, and an upper inclined surface 4633, as shown in FIG. The lower end surface 4631 and the upper end surface 4632 extend horizontally in parallel to the outside of the battery pack 1 . The upper inclined surface 4633 connects the extended edge of the lower end surface 4631 and the extended edge of the upper end surface 4632 at the extending end of the horizontal extending portion 463 and extends outward from the battery pack 1 . It constitutes an upper sloped surface of the tapered portion that gradually tapers to a tapered shape at the outlet end.

The base plate 45 is a housing arranged outside the battery group and above the battery group and having an open bottom end, and has a rectangular shape in a plan view. As shown in FIG. 3, a concave portion 451 is formed in the center of the upper surface of the base plate 45 so as to prevent the hand from contacting the upper surface of the base plate 45 when the handle 42 is gripped by the hand. ing. The four corners of the base plate 45 are fixed to the side case 26 with bolts 452, and the bolts 452 are covered with waterproof caps 453 for preventing water from entering from the positions of the bolts 452. installed.

Further, as shown in FIG. 1, a handle 42 is connected to the upper surface of the base plate 45 . The handle 42 is gripped by the user, for example, when carrying the battery pack 1 .

The handle 42 includes a first handle portion 421 and a second handle portion 422 . The first handle portion 421 is arranged along the outer circumference of the upper surface of the base plate 45 . The second handle portion 422 is arranged to extend in a direction orthogonal to the first handle portion 421 .

Specifically, the handle 42 has a handle body 43 and a handle cover 44 that covers the entire handle body 43, as shown in FIG. The handle main body 43 has a planar T shape including a first main body portion 431 that constitutes the first handle portion 421 and a second main body portion 432 that constitutes the second handle portion 422. are fixed to the base plate 45 by bolts 434, respectively. Also, the handle cover 44 includes a first cover portion 441 forming the first handle portion 421 and a second cover portion 442 forming the second handle portion 422 .

The central portion of the first body portion 431 has a square shape and is open in the front-rear direction. The first cover portion 441 of the handle cover 44 is formed with an opening 4411 having the same shape as the square-shaped opening in the central portion of the first body portion 431 .

A battery core pack (not shown) that constitutes a battery group (not shown) has a plurality of battery cells and a plurality of cell holders that hold the battery cells. Although the battery cell is preferably a lithium ion secondary battery, it is not particularly limited to this. For example, a secondary battery such as an all-solid battery, a nickel hydrogen battery, or a nickel cadmium battery may be used. A plurality of busbar plates (not shown) are provided so as to cover the positive terminals and negative terminals of the plurality of battery cells, respectively. The busbar plates connect a predetermined number of positive terminals or negative terminals in parallel. do. The plurality of busbar plates are connected in series to the connector section 33 via a BMU (not shown).

Next, the battery exchange device 100 of the charging station for charging the battery pack 1 will be described.

FIG. 5 is a front view showing the battery exchange device 100 into which the battery pack 1 is inserted. FIG. 6 is an explanatory side view showing the battery exchange device 100 into which the battery pack 1 is inserted. FIG. 7 is a diagram illustrating the seal ring 46 of the battery pack 1. FIG. FIG. 8 is a diagram illustrating how the battery pack 1 is inserted into the housing portion 110 of the battery exchange device 100. As shown in FIG.

As shown in FIG. 6, the battery exchange device 100 has a front panel 101, a rear panel 105, a bottom plate 102, and a top plate 103 as a housing, and has a rectangular parallelepiped outer shape. Also, the battery exchange device 100 includes a plurality of storage units 110 . The battery exchange device 100 charges the battery packs 1 housed in the plurality of housing sections 110 .

Each housing portion 110 is formed with an insertion hole into which a half or more of the battery pack 1 on the side of the bottom case 24 from the middle position in the longitudinal direction thereof can be inserted. is inserted into the insertion hole of and stored and held. The longitudinal direction, which is the direction in which the accommodating portion 110 extends, is oriented so as to be inclined with respect to the vertical direction. is oriented to

Therefore, the longitudinal direction, which is the extending direction of the battery pack 1 inserted into the insertion hole of the accommodating portion 110, is also oriented parallel to the longitudinal direction of the accommodating portion 110, and the extending direction of the battery pack 1 is obliquely downward. It is inserted into the accommodating portion 110 in an oriented positional relationship. A flange portion 111 is provided around the opening of the insertion hole of the accommodating portion 110 . That is, the housing portion 110 is provided so that the opening of the housing portion 110 is positioned near the seal ring 46 of the battery pack 1 housed in the housing portion 110, and the flange portion 111 that abuts the end portion of the seal ring 46 is provided. have.

As shown in FIG. 6 , a fan 121 is provided at the bottom of each accommodation section 110 . As the fan 121 rotates, the battery can be exchanged from the outside of the battery exchange device 100 as indicated by the arrow in FIG. Air can flow into the interior of the device 100 to cool the interior of the battery exchange device 100 . Thereby, the temperature of the battery pack 1 inserted into the insertion hole of the accommodation portion 110 is appropriately adjusted.

As for the air flow, in addition to the above, the fan 121 is installed in the opposite direction so that the air is sent from the inside of the battery exchange device 100 to each housing portion 110 by the fan 121, and the air flows to the outside from the flange portion 111 side. You may make it flow out. Further, a heat exchanger (cooler, heater, etc.) may be provided inside the battery exchange device 100 to send temperature-controlled air to each storage section 110 .

The battery pack 1 is charged in a state in which almost the entirety of it is inserted and held in the insertion hole. More specifically, in the battery pack 1 shown in FIG. 7 , the bottom case 24 and the side cases 26 are inserted into the insertion holes of the housing portion 110 , and the flange portion 111 is inserted into the insertion hole of the housing portion 110 of the battery pack 1 . The lower end surface 4631 (FIG. 8) of the horizontally extending portion 463 (see FIG. 4) of the seal ring 46 contacts the flange portion 111 as shown in FIG. ) are in contact with each other.

Due to this contact, the space between the flange portion 111 and the seal ring 46 is liquid-tightly sealed. A closed space 113 surrounded by the flange portion 111 , the seal ring 46 , the inner surface of the housing portion 110 , and the outer surface of the battery pack 1 is formed between the inner surface of the housing portion 110 and the outer surface of the battery pack 1 . formed between Here, the "closed space" does not have to be completely airtight or liquidtight. That is, in the present embodiment, an inlet/outlet hole for cooling air, an outlet hole for foreign matter, and the like indicated by arrows in FIG. 6 may be formed. Further, as described above, when the fan 121 for flowing the cooling air indicated by the arrow in FIG. You may make it promote the flow of.

After being detached from the battery exchange device 100, the battery pack 1 is removably inserted into an insertion hole of a housing portion (not shown) of the battery pack 1 of, for example, a power-assisted bicycle or an electric motorcycle. . In this case, the flange portion of the housing portion and the seal ring 46 are in contact with each other, and the space between the flange portion of the housing portion and the seal ring 46 is liquid-tightly sealed. The closed space surrounded by the inner surface of the battery pack 1 and the outer surface of the battery pack 1 is formed between the inner surface of the housing portion and the outer surface of the battery pack 1 as described above. is inserted into the insertion hole of the housing portion 110 of the battery exchange device 100 .

According to this embodiment, the following effects are achieved.
In this embodiment, the battery pack 1 is provided so as to extend from a housing (bottom case 24, side case 26, top cover 41) that houses a group of batteries and a surface facing the outside of the housing, and has elasticity. a seal ring 46 having a

As a result, the elastic seal ring 46 can seal the opening of the storage portion 110 that stores the battery pack 1, and the opening of the storage portion 110 is not provided with a door, so that the battery can be stored even in rainy weather. It is possible to prevent the inside of the housing of the exchanging device 100 from getting wet. Further, it is possible to control the temperature of the battery pack 1 by adjusting the temperature to an appropriate temperature within the storage section 110 of the battery exchange device 100 sealed by the seal ring 46 .

That is, the state in which the battery packs 1 are stored in all the storage units 110 of the battery exchange device 100 is set as a normal state, and the operating mode is such that after receiving the battery packs 1 for lending, the battery packs 1 for return are inserted. Therefore, the exposure of the interior of the storage unit 110 to the outside of the battery exchange device 100 is limited to a short period of time from when the battery pack 1 to be newly used is pulled out to when the battery pack 1 to be returned is inserted. . Therefore, even if a door is not provided for storage portion 110, there is almost no need to worry about the interior of storage portion 110 being exposed to water or the effect on the cooling efficiency of battery pack 1 inside storage portion 110. FIG.

In addition, in the present embodiment, the seal ring 46 is provided in an annular shape separately from the housing, and is fitted and arranged on the surface of the housing. This makes it possible to easily provide the seal ring 46 in the housing.

In this embodiment, the housing is composed of three members (bottom case 24, side case 26, top cover 41) in the extending direction of the battery pack 1, and the seal ring 46 is formed by the side case 26 and the top cover. 41 are sandwiched between two members. As a result, the seal ring 46 can be sandwiched between two members and can be easily provided in the housing.

In addition, in this embodiment, the housing has a handle 42 for gripping the battery pack 1 on the end face of the top cover 41 which is one of the two members of the side case 26 and the top cover 41 . This enables a configuration in which the seal ring 46 is arranged near the handle 42 .

Further, in the present embodiment, the seal ring 46 is removably provided in the housing portion 110 of the battery exchange device 100 electrically connected to the battery pack 1 , and the seal ring 46 is attached to the housing portion 110 when inserted into the housing portion 110 . It is provided so as to abut on the flange portion 111 , and is provided so as to form a closed space 113 between the side surface 261 of the battery pack 1 and the inner surface of the housing portion 110 by the seal ring 46 and the housing portion 110 .

As a result, since the closed space 113 is formed, it is possible to easily adjust the temperature of the battery pack 1 to an appropriate temperature within the housing portion 110 of the battery exchange device 100 sealed by the seal ring 46. It is possible to facilitate management of the battery pack 1 .

Further, in the present embodiment, the seal ring 46 is positioned at the opening side of the housing portion 110 when the battery pack 1 is housed in the housing portion 110 rather than the middle position in the extending direction of the battery pack 1 . placed. As a result, more than half of the battery pack 1 can be accommodated in the accommodation section 110, and the temperature of the battery pack 1 can be easily adjusted to an appropriate temperature within the accommodation section 110 of the battery exchange device 100. .

In addition, in the present embodiment, the housing portion 110 is provided so that the opening of the housing portion 110 is positioned near the seal ring 46 of the battery pack 1 housed in the housing portion 110 , and the end portion of the seal ring 46 and the seal ring 46 are aligned. It has an abutting flange portion 111 . As a result, since the seal ring 46 can seal the opening of the housing portion 110, it is possible to prevent the interior of the housing of the battery exchange device 100 from being exposed to water during rainy weather.

In addition, in the present embodiment, the seal ring 46 can abut on the end surface of the seal ring 46 on the side of the insertion direction of the battery pack 1 into the housing portion 110 . As a result, when the battery pack 1 is inserted into the housing portion 110 , the seal ring 46 easily comes into contact with the flange portion 111 , and the seal between the seal ring 46 and the flange portion 111 can be easily secured. Become.

Further, in the present embodiment, the battery pack 1 is inserted into the housing portion 110 in such a positional relationship that the extending direction of the battery pack 1 is oriented obliquely downward. As a result, although the housing portion 110 is likely to be exposed to water during rainy weather, the seal between the seal ring 46 and the flange portion 111 can suppress the exposure to water.

Next, a second embodiment of the invention will be described. The battery pack 1A constituting the electric storage device according to the second embodiment has a shape of the seal ring 46A that differs from the shape of the seal ring 46 of the battery pack 1 according to the first embodiment. Different from pack 1. Other configurations are the same as those of the battery pack 1 according to the first embodiment, and the same configurations are denoted by the same reference numerals and descriptions thereof are omitted. FIG. 9 is a diagram illustrating the seal ring 46A of the battery pack 1A. FIG. 10 is a diagram illustrating how the battery pack 1A is inserted into the housing portion 110 of the battery exchange device.

The seal ring 46A of the battery pack 1A has a lower inclined surface 4633A instead of the upper inclined surface 4633 in the first embodiment. The lower inclined surface 4633A constitutes a lower inclined surface of a mortar-shaped tapered portion whose extending end gradually becomes thinner toward the outside of the battery pack 1A (toward the left side in FIG. 9). . As shown in FIG. 10, the flange portion 111 of the accommodating portion 110 abuts against the lower inclined surface 4633A, as in the first embodiment.

Next, a third embodiment of the invention will be described. The battery pack 1B constituting the electric storage device according to the third embodiment differs in the shape of the seal ring 46B from the shape of the seal ring 46 of the battery pack 1 according to the first embodiment, and accommodates the battery exchange device 100. The battery pack 1B is different from the battery pack 1 according to the first embodiment in that the battery pack 1B is inserted into and stored and held in an insertion hole of another housing portion 110B for a power-assisted bicycle, an electric motorcycle, or the like, which is different from the portion 110. is different. Other configurations are the same as those of the battery pack 1 according to the first embodiment, and the same configurations are denoted by the same reference numerals and descriptions thereof are omitted. FIG. 11 is a diagram illustrating the seal ring 46B of the battery pack 1B. FIG. 12 is a diagram illustrating how the battery pack 1B is inserted into the housing portion 110B.

The seal ring 46B of the battery pack 1B has a semicircular tip portion 4635B instead of the upper inclined surface 4633 in the first embodiment. As shown in FIG. 12, the flange portion 111B has a cross-sectional shape taken along a plane parallel to the longitudinal direction of the battery pack 1B. It has a rectangular shape with a tapered surface of . The battery pack 1B is accommodated and held in the insertion hole of the accommodation portion 110B with the tip of the semicircular tip portion 4635B of the battery pack 1B in contact with the inner peripheral surface of the flange portion 111B.

Due to this contact, the space between the flange portion 111B and the seal ring 46B is liquid-tightly sealed. A closed space 113B surrounded by the flange portion 111B, the seal ring 46B, the inner surface of the housing portion 110B, and the outer surface of the battery pack 1B is formed between the inner surface of the housing portion 110B and the outer surface of the battery pack 1B. formed between

The semicircular tip portion 4635B, which is the extending end of the seal ring 46B of the battery pack 1B, can also contact the flange portion 111 of the housing portion 110 in the first embodiment. The space between the flange portion 111 of the housing portion 110 and the seal ring 46B in the embodiment is liquid-tightly sealed. In addition, the closed space 113 surrounded by the flange portion 111, the seal ring 46B, the inner surface of the housing portion 110, and the outer surface of the battery pack 1B in the first embodiment is formed between the inner surface of the housing portion 110 and the battery pack. It is formed between the outer surface of 1B.

According to this embodiment, the following effects are obtained.
In this embodiment, the flange portion 111B can abut on the semicircular tip portion 4635B in the extending direction of the seal ring 46B. This makes it possible to ensure a stable seal between the flange portion 111B and the seal ring 46B regardless of the inserted state of the battery pack 1B.
Further, in the present embodiment, the battery pack 1B is removably provided in a housing portion 110B, which is another electric power device different from the battery exchange device 100, such as a power-assisted bicycle or an electric motorcycle. is provided so as to abut on the accommodating portion 110B when inserted into the accommodating portion 110B. As a result, the battery pack 1B having the seal ring 46B can be housed in contact with the flange portions 111 and 111B in both the housing portion 110 and the housing portion 110B.

Next, a fourth embodiment of the invention will be described. The battery pack constituting the electric storage device according to the fourth embodiment has a shape of the seal ring 46C different from the shape of the seal ring 46 of the battery pack 1 according to the first embodiment. different from 1. The configuration other than this is the same as the configuration of the battery pack 1 according to the first embodiment. FIG. 13 is an explanatory diagram illustrating the seal ring 46C of the battery pack.

As shown in FIG. 13, the seal ring 46C has a C-shaped cross section taken along a plane parallel to the longitudinal direction of the battery pack, and a space 4636C is formed inside the seal ring 46C. When the seal ring 46C abuts against the flange portion 111 and the flange portion 111B, the space 4636C expands or contracts, facilitating deformation of the seal ring 46C.

According to this embodiment, the following effects are obtained.
In this embodiment, the seal ring 46C is formed with a space 4636C that facilitates deformation of the seal ring 46C. As a result, the seal ring 46C can be sufficiently deformed, and the seal between the seal ring 46C and the flange portion 111 can be reliably ensured.

Next, a fifth embodiment of the present invention will be described. The battery pack constituting the electric storage device according to the fifth embodiment has a shape of the seal ring 46D different from the shape of the seal ring 46 of the battery pack 1 according to the first embodiment. different from 1. The configuration other than this is the same as the configuration of the battery pack 1 according to the first embodiment. FIG. 14 is an explanatory diagram illustrating the seal ring 46D of the battery pack.

As shown in FIG. 14, the seal ring 46D has a C-shaped cross section taken along a plane parallel to the longitudinal direction of the battery pack, and a space 4636D is formed inside the seal ring 46D. formed. The contact of the seal ring 46D with the flange portion 111 and the flange portion 111B causes the space 4636D to expand or contract, thereby facilitating deformation of the seal ring 46D.

Next, a sixth embodiment of the present invention will be described. The battery pack constituting the battery pack according to the sixth embodiment has a shape of the seal ring 46E different from the shape of the seal ring 46 of the battery pack 1 according to the first embodiment. different from 1. The configuration other than this is the same as the configuration of the battery pack 1 according to the first embodiment. FIG. 15 is an explanatory diagram illustrating the seal ring 46E of the battery pack.

As shown in FIG. 15, the seal ring 46E has a pair of convex portions 464E with a space 4636E formed therebetween in a cross section taken along a plane parallel to the longitudinal direction of the battery pack. When the seal ring 46E abuts against the flange portion 111 and the flange portion 111B, the space 4636E between the pair of convex portions 464E expands or contracts, facilitating deformation of the seal ring 46E.

Next, a seventh embodiment of the invention will be described. The seventh embodiment differs from the first embodiment in that the battery pack 1 is inserted into an insertion hole of another housing portion 110F of the battery exchange device 100, which is different from the housing portion 110, and is housed and held. . Other configurations are the same as those of the first embodiment, and the same configurations are denoted by the same reference numerals, and descriptions thereof are omitted. FIG. 16 is a diagram illustrating how the battery pack 1 is inserted into another housing portion 110F.

The accommodation portion 110F includes an internal support portion 111F instead of the flange portion 111 of the accommodation portion 110 in the first embodiment. The internal support portion 111F is fixed to the inner peripheral surface forming the insertion hole of the housing portion 110F and protrudes inward of the housing portion 110F. The projecting end of the internal support portion 111F contacts the side surface 261 of the side case 26 of the battery pack 1 removably inserted into the insertion hole of the housing portion 110F to support the battery pack 1. As shown in FIG. At this time, the seal ring 46 is in a state of not coming into contact with the accommodating portion 110F.

According to this embodiment, the following effects are obtained.
In this embodiment, when the seal ring 46 is inserted into the other housing portion 110F, the internal support portion 111F of the other housing portion 110F abuts against the side case 26 without coming into contact with the other housing portion 110F. is provided as follows. Thereby, it is possible to stably support the battery pack 1 also in the housing portion 110F. Moreover, when a seal is unnecessary, the durability of the seal ring 46 can be improved by not contacting the seal ring 46 .

It should be noted that the present invention is not limited to the above-described embodiments, and includes modifications, improvements, etc. within the scope of achieving the object of the present invention.
For example, the configurations of the electric storage device, the electric power device, etc. are not limited to the configurations of the battery pack 1, the battery exchange device 100, etc. in this embodiment. Therefore, for example, the battery pack 1 has a housing composed of three members: the bottom case 24, the side cases 26, and the top cover 41 (the handle body 43, the handle cover 44, and the base plate 45). However, the housing may be composed of at least two members in the extending direction of the electric storage device. That is, for example, the bottom case 24 and the side case 26 may be integrally constructed.

Also, the battery pack 1 as a storage device has been applied to, for example, a power-assisted bicycle, a portable driving power source that is detachably mounted on an electric motorcycle, etc., but is not limited to these. For example, it may be used for a capacitor used in an electric device having a capacitor therein.

1, 1A, 1B...Battery pack (capacitor)
24 ... Bottom case (housing)
26... Side case (housing)
41 ... Top cover (housing)
42 ... Handle (grip portion)
46, 46A, 46B, 46C, 46D, 46E ... seal ring (extension)
100... Battery exchange device (power supply device)
110, 110B, 110F...Accommodating portion 111...Flange portion (contact portion)
113... Closed space 4635B... Semicircular tip (extending end)

Claims (13)

a housing that accommodates a power storage unit;
an elastic extension provided to extend from a surface facing the outside of the housing. 2. The electric storage device according to claim 1, wherein said extending portion is provided in an annular shape separately from said housing, and is arranged by being fitted on said surface of said housing. The extending portion is provided annularly separately from the housing,
the housing is composed of at least two members in the extending direction of the capacitor;
2. The electric storage device according to claim 1, wherein said extending portion is sandwiched between said two members. 4. The electric storage device according to claim 3, wherein said casing has a gripping portion for gripping said storage device on an end surface of said one of said two members in said extending direction. The electric storage device according to any one of claims 1 to 4, wherein the extending portion is provided with a space for facilitating deformation of the extending portion. is detachably provided in a housing portion of a power device electrically connected to the capacitor,
The extending portion is provided so as to abut on the accommodating portion when inserted into the accommodating portion,
The electric storage device according to any one of claims 1 to 5, wherein the extending portion and the accommodating portion form a closed space between the surface of the electric storage device and the inner surface of the accommodating portion. . 7. The extending portion according to claim 6, wherein the extending portion is arranged at a position closer to the opening side of the accommodating portion when the electric storage device is accommodated in the accommodating portion than at a middle position in the extending direction of the electric storage device. storage battery. The accommodating portion is provided so that the opening of the accommodating portion is positioned near the extending portion of the electric storage device accommodated in the accommodating portion, and has a contact portion that contacts an end portion of the extending portion. The capacitor according to claim 7. 9. The electric storage device according to claim 8, wherein said contact portion can abut on an end face of said extending portion on a side of said electric storage device in a direction of insertion into said accommodating portion. 9. The electric storage device according to claim 8, wherein the contact portion can contact the extending end of the extending portion in the extending direction. The electric storage device according to any one of claims 6 to 10, wherein the electric storage device is inserted into the accommodating portion in a positional relationship in which the extending direction of the electric storage device is oriented obliquely downward. the electric storage device is detachably provided in another housing portion of another electric power device different from the electric power device,
The electric storage device according to any one of claims 6 to 10, wherein the extending portion is provided so as to abut on the other accommodating portion when inserted into the other accommodating portion. the electric storage device is detachably provided in another housing portion of another electric power device different from the electric power device,
6 to claim, wherein the extending portion is provided so that when it is inserted into the other accommodating portion, the extending portion does not contact the other accommodating portion, and the other accommodating portion abuts the housing. Item 11. The capacitor according to any one of items 10 to 11.

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