JP6120198B1 - Power storage device - Google Patents

Abstract

The present invention relates to a power storage device and is intended to enhance safety. An injection path of a combustible gas ejected from a joint portion 1A between an opening of a main body case 1 and an outer peripheral portion of a lid body 5 is provided on at least one outer peripheral portion of the main body case 1 and the lid body 5. A flame retardant cover 6 extending on the surface opposite to the opening of the case 1 was attached. That is, even if combustible gas removes the joint state between the opening of the main body case 1 and the outer peripheral portion of the lid body 5 and jets out of the main body case 1 from this portion, the portion is not covered by the flame retardant cover 6. Because it is covered, the part where the flammable gas comes into contact with the air outside the main body case 1 is far away from the damaged battery element 4, which greatly reduces the possibility of igniting the flammable gas and is safe. It becomes a high quality thing. [Selection] Figure 5

Description

  The present invention relates to a power storage device used in portable devices and various electronic devices.

  Portable devices and various electronic devices that can be carried require a power storage device as a power source, and this power storage device is built into the portable device or various electronic devices or connected by a power cable. Yes.

  In recent years, since such a power storage device has been used with a high energy density, a power storage element is built in the main body case for safety. Specifically, the power storage device includes a main body case provided with an opening at least on one end side and the inside serving as a power storage element storage section, a power storage element stored in the power storage element storage section of the main body case, and a main body It is mounted on the opening of the case, and the opening is provided with a lid whose outer peripheral part is bonded or welded (for a similar structure, for example, the following patent Document 1 exists).

JP 2008-218210 A

  In the above conventional example, the lid is attached to the opening of the main body case, and the outer peripheral portion thereof is bonded or welded to the opening of the main body case so that the power storage element is not easily touched. By doing so, safety is improved. Moreover, the said prior art example prevents the similar burning to the adjacent electrical storage element by providing a fire wall between the several electrical storage elements accommodated in the electrical storage element accommodating part. That is, it has been widely known that there is a possibility that a power storage element may ignite, and a fire wall is provided as a countermeasure.

  However, if a high temperature combustible gas is ejected from one power storage element due to an impact or the like and ignites, the entire body case becomes a high temperature atmosphere. Even if a fire wall is provided, the adjacent power storage element is damaged. Is inevitable.

  In view of the above, an object of the present invention is to improve safety even when a power storage element is damaged.

  In order to achieve the above object, a power storage device according to the present invention includes a main body case having an opening provided at least on one end side, and the inside serving as a power storage element storage portion, and being stored in the power storage element storage portion of the main body case. A flammability that is attached to the opening and the lid is attached to the opening and the outer periphery of which is joined to the opening, and is ejected from the joint between the opening and the outer periphery of the lid A flame-retardant cover is provided to extend a gas ejection path to the surface opposite to the opening or the surface of the lid.

  In the power storage device according to the present invention, the main body case and the lid body have a rectangular shape, and at least one of the operation section and the connection section is disposed on the rectangular main body case or one short side outer peripheral portion of the lid body. One side is disposed, and an operation opening or a connection opening is formed in an outer peripheral portion corresponding to the operation portion or the connection portion of the flame retardant cover, and a long side of the rectangular main body case The storage element storage portion is disposed inside the portion, and an outer peripheral portion of the flame retardant cover corresponding to the storage element storage portion is a non-opening portion.

  The power storage device according to the present invention includes the operation unit or the connection unit on the side provided with at least one of the operation unit or the connection unit inside the main body case or the lid. A partition wall for partitioning the storage element storage portion is provided.

  The power storage device according to the present invention is characterized in that a plurality of the power storage elements are arranged in the power storage element storage portion.

  The power storage device according to the present invention is characterized in that a battery element with a safety valve and a capacitor element with a safety valve are used as the power storage element.

  The power storage device according to the present invention is characterized in that the flame retardant cover is made of silicon resin.

  In the power storage device according to the present invention, at least one of the main body case and the lid body is made of a synthetic resin, and the main body case and the lid body are bonded by an adhesive at the joint portion or by melting the synthetic resin. It is characterized by being joined.

  In the power storage device according to the present invention, the flame retardant cover and the main body case have a bottomed cylindrical shape, and the main body case on the opposite side of the lid or the lid at the bottom surface portion of the flame retardant cover. An outer peripheral surface portion of the bottomed cylindrical flame-retardant cover covers the surface, covers the joint portion of the main body case and the lid, and an inner peripheral surface portion of the opening of the bottomed cylindrical flame-retardant cover Then, the outer peripheral portion of the surface of the main body case on the opposite side of the lid or the outer peripheral portion of the lid is covered.

  As described above, in the power storage device of the present invention, the combustible gas ejection path ejected from the joint between the opening of the main body case and the outer periphery of the lid is provided on at least one outer periphery of the main body case and the lid. Since the main body case is provided with a flame retardant cover extending on the surface opposite to the opening or the surface of the lid, safety can be improved even if the power storage element is damaged.

  That is, if for some reason the power storage element is damaged and high temperature combustible gas is ejected from the power storage element, the high temperature combustible gas releases the joint state between the opening of the main body case and the outer periphery of the lid. This part will be ejected out of the main body case, but since this part is covered with a flame retardant cover, the combustible gas is on the surface opposite to the opening of the main body case, or the lid. It will be led to the surface of.

  As a result, the part where the combustible gas comes into contact with the air outside the main body case is a place far away from the damaged storage element in the main body case, and thereby the possibility that the combustible gas is ignited is extremely low. It will be highly safe.

1 is a perspective view of a power storage device according to an embodiment of the present invention. It is a disassembled perspective view of the electrical storage apparatus which concerns on embodiment of this invention. It is a disassembled perspective view of the electrical storage apparatus which concerns on embodiment of this invention. The cross section of the electrical storage apparatus which concerns on embodiment of this invention is shown, and is AA sectional drawing in FIG. The cross section of the electrical storage apparatus which concerns on embodiment of this invention is shown, and is explanatory drawing for demonstrating the ejection path | route of gas in the AA cross section in FIG.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

  1 to 3 show a power storage device according to an embodiment of the present invention. Reference numeral 1 denotes a bottomed cylindrical main body case provided with an opening 2 on one end side. As shown in FIG. A plurality of battery elements 4 are stored in the storage element storage portion 3 as the storage element. A bottomed cylindrical lid 5 is attached to the opening 2 of the main body case 1. The main body case 1 and the lid 5 are made of a synthetic resin, and the joint portion 1A of both is joined by bonding with an adhesive or melting of the synthetic resin.

  That is, the outer peripheral portion of the bottomed cylindrical lid body 5 is brought into contact with the opening 2 of the bottomed cylindrical main body case 1 and bonded by bonding with an adhesive or melting of the synthetic resin at the contact portion. This prevents the battery element 4 or other circuit portions from being inadvertently touched.

In this state, in this embodiment, the flame retardant cover 6 is attached to the main body case 1 and the lid body 5 portion. Each part will be described in detail. First, the main body case 1, the lid body 5 and the flame retardant cover 6 are rectangular in plan view, and the rectangular main body case 1 (or the lid body 5) may be used. A connection part 7a for charging or power feeding (may be various operation parts 7b) is arranged on one short side outer peripheral part, and the connection part 7a (or operation part 7b) of the flame retardant cover 6 is arranged. A connection opening 8a (or an operation opening 8b) is formed in the outer peripheral portion corresponding to, and the storage element storage portion 3 is arranged inside the long side portion of the main body case 1 having the rectangular shape, The outer peripheral portion of the flame retardant cover 6 corresponding to the electricity storage element storage portion 3 is an opening non-forming portion 9.
Further, inside the main body case 1 (or inside the lid body 5), on the side where at least one of the connection portions 7a (or the operation portion 7b) is provided, the connection portion 7 (or the operation portion 7b) and the storage element storage portion are provided. 3 is provided.

  The battery element 4 used as a power storage element is provided with a safety valve (not shown) on the positive electrode side. Even when a capacitor element is used as the power storage element, a battery element with a safety valve is used.

  As described above, the flame retardant cover 6 has a bottomed cylindrical shape together with the main body case 1 and the lid body 5, and covers the lid body 5 with the bottom surface portion of the flame retardant cover 6. The outer peripheral surface portion of the flammable cover 6 covers the joint portion 1A portion of the main body case 1 and the lid body 5, and the opening inner peripheral surface portion 12 of the bottomed cylindrical flame retardant cover 6 is opposite to the lid body 5. The outer peripheral portion 13 of the surface of the main body case 1 on the side is covered.

  In contrast to FIG. 4, when the bottomed cylindrical lid 5 is on the upper side and the main body case 1 is on the lower side, the surface of the main body case 1 on the opposite side of the lid 5 at the bottom surface portion of the flame retardant cover 6. The outer peripheral surface portion of the bottomed cylindrical flame retardant cover 6 covers the joint 1A portion of the main body case 1 and the lid 5 and the inner periphery of the opening of the bottomed cylindrical flame retardant cover 6 The surface portion 12 may cover the outer peripheral portion 14 of the lid body 5.

  The flame retardant cover 6 is made of a silicon resin having a high heat resistance of 200 ° C. to 400 ° C., and having a low flexibility and thermal conductivity.

  Further, the plurality of battery elements 4 used as power storage elements are fixed to the control board 11.

  In the above configuration, the feature of the present embodiment is that the flame retardant cover 6 is attached to the main body case 1 and the lid 5 portion. Since it is made of flexible and shock-absorbing silicone resin, even if the main body case 1 is dropped or another object is hit against the main body case 1 or the lid 5, the flexibility In addition, the battery element 4 in the main body case 1 is less damaged by the buffering property.

  Further, even when the battery element 4 in the main body case 1 is damaged for some reason and as a result, combustible gas is ejected from the safety valve portion of the battery element 4, in this embodiment, the safety is extremely increased. Can do.

This point will be described in detail. When flammable gas is ejected from the safety valve portion of the battery element 4, first, the joint at the joint portion 1A of the main body case 1 and the lid body 5 is heated at a high temperature or high pressure as shown in FIG. The gap 1B is formed.
As a result, the combustible gas ejected from the gap 1B to the outside of the main body case 1 spreads the flexible flame-retardant cover 6 outward of the main body case 1 as shown in FIG. The narrow gap 1C between the outer peripheral wall 1 and the inner surface of the flame retardant cover 6 flows upward and comes into contact with air at the surface portion of the main body case 1.

That is, in the present embodiment, the jet path of the combustible gas ejected from the joint 1 </ b> A between the main body case 1 and the lid body 5 is narrow between the outer peripheral wall of the main body case 1 and the inner surface of the flame retardant cover 6. It is extended to the surface of the main body case 1 through the gap 1C, and is configured to come into contact with air after passing through this extended portion.
For this reason, the distance from the damaged battery element 4 to the place where the flammable gas comes into contact with the air is increased, and as a result, the possibility that the flammable gas is ignited is extremely low and the safety is high. .

  Moreover, in this embodiment, since the flame-retardant cover 6 is comprised with the heat-resistant silicon resin, the flame-retardant cover 6 is not damaged by the high temperature combustible gas which ejects from the junction part 1A. . Since the flame retardant cover 6 is made of silicon resin, it is slightly deformed outward due to its flexibility, and between the outer peripheral wall of the main body case 1 and the inner surface of the flame retardant cover 6. In addition, the narrow gap 1C through which the combustible gas is ejected is reliably formed, and as a result, the area where the combustible gas is in contact with the air can be extended to the surface of the main body case 1 to achieve high safety.

  In the present embodiment, as described above, the main body case 1, the lid body 5, and the flame retardant cover 6 are rectangular in plan view, and these rectangular main body case 1 (or the lid body 5 may be used). A connecting portion 7a for charging or feeding (or various operating portions 7b) may be disposed on the outer peripheral portion of one short side, and the connecting portion 7a (or the operating portion 7b) of the flame retardant cover 6 may be disposed. ) Is formed with a connection opening 8a (or an operation opening 8b), and the storage element storage portion 3 is arranged inside the long side portion of the rectangular main body case 1. The outer peripheral portion of the flame retardant cover 6 corresponding to the electricity storage element storage portion 3 is an opening non-forming portion 9.

  That is, even if the battery element 4 in the main body case 1 is damaged for some reason, and as a result, combustible gas is ejected from the safety valve portion of the battery element 4, in this embodiment, the long side of the main body case 1 is used. Since the side portion has a lower strength and is more easily bent than the short side portion, the joint portion 1A of the long side portion of the main body case 1 and the lid 5 is easily detached. Since the outer peripheral portion of the flame retardant cover 6 corresponding to the long side portion is an opening non-forming portion 9, a combustible gas is ejected between the outer peripheral wall of the main body case 1 and the inner surface of the flame retardant cover 6. As a result, the area where the flammable gas is in contact with the air can be extended to the surface of the main body case 1 so that the safety is high.

  Further, on the side of the main body case 1 (or inside the lid 5) where at least one of the connection portions 7a (or the operation portion 7b) is provided, the connection portion 7a (or the operation portion 7b) and the storage element storage portion 3 is provided.

  That is, since the short side portion of the main body case 1 is reinforced by the partition wall 10, the joint portion 1 </ b> A of the long side portion of the main body case 1 and the lid 5 is also compared with the short side portion from this point. Is easy to come off. Since the outer peripheral portion of the flame retardant cover 6 corresponding to the long side portion is an opening non-forming portion 9, a combustible gas is ejected between the outer peripheral wall of the main body case 1 and the inner surface of the flame retardant cover 6. As a result, the area where the flammable gas is in contact with the air can be extended to the surface of the main body case 1 so that the safety is high.

  For reference, a smartphone as a general portable device is rectangular so that a user can easily hold it with a hand, and an operation unit is arranged on the long side so that the user can easily operate with a thumb or index finger. . Accordingly, the cover is also rectangular following the shape of the smartphone, and an opening for exposing the operation unit is formed in the long side portion of the cover. Therefore, when the combustible gas is ejected from the long side portion, the combustible gas is immediately mixed with the outside air at the opening of the cover.

  As mentioned above, although embodiment of this invention was explained in full detail, this invention is not limited to the said embodiment. The present invention can be modified in various ways without departing from the scope of the claims. The present invention can increase the safety of the power storage device and is extremely useful.

DESCRIPTION OF SYMBOLS 1 Main body case 1A Junction part 1B Crevice 1C Crevice 2 Opening part 3 Storage element storage part 4 Battery element 5 Cover body 6 Flame retardant cover 7a Connection part 7b Operation part 8a Connection opening part 8b Operation opening part 9 No opening formation part 10 Partition Wall 11 Control board 12 Opening inner peripheral surface portion 13 Surface outer peripheral portion 14 Outer peripheral portion of lid

Claims (8)

A body case in which an opening is provided on at least one end side, and the inside is a storage element storage unit;
A power storage device housed in the power storage device housing portion of the main body case;
Attached to the opening, and provided with a lid with an outer periphery joined to the opening,
Power storage equipped with a flame retardant cover that extends the ejection path of the combustible gas ejected from the joint between the opening and the outer periphery of the lid to the surface opposite to the opening or the surface of the lid apparatus.   The main body case and the lid body have a rectangular shape, and at least one of an operation section or a connection section is disposed on the rectangular main body case or one short side outer peripheral portion of the lid body, and the flame retardant An operation opening or a connection opening is formed in an outer peripheral portion corresponding to the operation portion or the connection portion of the protective cover, and the power storage element is disposed inside the long side portion of the rectangular main body case. The power storage device according to claim 1, wherein a storage portion is disposed, and an outer peripheral portion of the flame retardant cover corresponding to the power storage element storage portion is an opening non-forming portion.   The operation unit or the connection unit and the storage element storage unit are partitioned on the side provided with at least one of the operation unit or the connection unit inside the main body case or the lid. The power storage device according to claim 2, further comprising a partition wall.   The power storage device according to any one of claims 1 to 3, wherein a plurality of the power storage elements are arranged in the power storage element storage portion.   The power storage device according to any one of claims 1 to 4, wherein a battery element with a safety valve and a capacitor element with a safety valve are used as the power storage element.   The power storage device according to claim 1, wherein the flame retardant cover is made of a silicon resin.   The at least one of the main body case and the lid body is made of a synthetic resin, and the main body case and the lid body are joined by bonding with an adhesive or melting of the synthetic resin at the joint portion. The electrical storage apparatus as described in any one.   The flame retardant cover and the main body case have a bottomed cylindrical shape, and the bottom surface portion of the flame retardant cover covers the lid body or the surface of the main body case on the opposite side of the lid body. The outer peripheral surface portion of the flame retardant cover covers the joint portion of the main body case and the lid body, and the inner peripheral surface portion of the opening of the bottomed cylindrical flame retardant cover is opposite to the lid body. The power storage device according to claim 1, wherein the outer peripheral portion of the surface of the main body case or the outer peripheral portion of the lid body is covered.

Images