JP5948087B2 - Power storage device - Google Patents

Description

  The present invention relates to an electricity storage device and a method for connecting an electricity storage device.

  A sealed storage cell having a structure in which an electrode stack including a positive electrode and a negative electrode is housed in an outer package together with an electrolyte and sealed is known. As a form of such a storage cell, for example, a lithium ion capacitor having a high voltage is known.

  In recent years, in order to further increase the output and voltage of such a storage cell, a stacked type in which a plurality of storage cells are connected in series is known. For example, Patent Document 1 discloses a configuration in which power storage cells each including a laminate film as an exterior body are stacked. Patent Document 2 discloses a configuration in which power storage cells each having a square outer can as an outer body are stacked. Patent Document 3 discloses that in a battery pack in which power storage cells (single cells) are made conductive, a plurality of power storage cells in the battery pack can be connected at a time by rotating a conductive washer after stacking the power storage cells. Has been.

JP 2006-236605 A JP 2008-166191 A JP 2005-116444 A

  When an electricity storage device including such an electricity storage cell is electrically connected to a connected part to which a voltage is applied, for example, an output terminal of the electricity storage device and a terminal of the connected part are connected. At the same time, a voltage may be applied to the connected part. When the power storage device is electrically connected to the connected part, an operator may touch the terminal of the power storage device or the connected part. As described above, since the power storage cell is designed to have a high output and a high voltage, a power storage device having high safety is required. In particular, when an electrical storage device having electrical storage cells connected in series is electrically connected to a connected part to which a voltage is applied, an extremely high voltage is stored compared to the voltage between the electrical storage cells. It depends on the device, and higher safety is required.

  One of the objects according to some embodiments of the present invention is to provide an electricity storage device having high safety. Another object of some aspects of the present invention is to provide a method for connecting power storage devices having high safety.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following aspects or application examples.

[Application Example 1]
One aspect of the electricity storage device according to the present invention is:
A storage cell having a positive terminal and a negative terminal;
One electrode terminal of the positive electrode terminal and the negative electrode terminal, and an output terminal part, a switch part that can be electrically separated and connected,
including.

  In the description according to the present invention, the term “electrically connected” is used, for example, as another specific member (hereinafter “electrically connected” to “specific member (hereinafter referred to as“ A member ”)”. B member "))" and the like. In the description according to the present invention, in the case of this example, the case where the A member and the B member are in direct contact and electrically connected, and the A member and the B member are the other members. The term “electrically connected” is used as a case where the case where the terminals are electrically connected to each other is included.

[Application Example 2]
In application example 1,
The switch part is
A conductive member electrically connected to the electrode terminal;
An insulating member disposed so as to be able to be inserted and removed between the conductive member and the output terminal portion;
Have
In the first state where the insulating member is inserted between the conductive member and the output terminal portion, the electrode terminal is electrically separated from the output terminal portion,
In the second state where the insulating member is removed from between the conductive member and the output terminal portion, the electrode terminal may be electrically connected to the output terminal portion.

[Application Example 3]
In application example 2,
The switch part is
A screw part penetrating the conductive member and the output terminal part;
The conductive member is fixed to the screw part via an insulating screw holder part,
In the second state, the conductive member may be brought into contact with the output terminal portion by tightening the screw portion.

[Application Example 4]
In application example 1,
The switch part is
A conductive member electrically connected to the electrode terminal;
An insulating member penetrating the conductive member and the output terminal portion;
A mounting portion for mounting the insulating member;
Have
The mounting portion has a first uneven portion,
The insulating member has a second uneven portion,
In the first state in which the convex portion of the first uneven portion and the convex portion of the second uneven portion are in contact, the conductive member is separated from the output terminal portion,
The conductive member may be in contact with the output terminal portion in a second state in which the convex portion of the first uneven portion and the concave portion of the second uneven portion are in contact.

[Application Example 5]
In application example 4,
The switch part is
A screw portion penetrating the insulating member and the placement portion;
In the second state, the conductive member may be brought into contact with the output terminal portion by tightening the screw portion.

[Application Example 6]
In application example 1,
The switch part is
A first elastic portion having conductivity, electrically connected to the output terminal portion;
A conductive second elastic portion electrically connected to the electrode terminal and spaced apart from the first elastic portion;
A first conductive portion disposed between the first elastic portion and the second elastic portion so as to be able to be put in and out;
Have
The first elastic part and the second elastic part may be electrically connected in a state where the first conductive part is inserted between the first elastic part and the second elastic part.

[Application Example 7]
In Application Example 6,
A conductive terminal connection member connected to the electrode terminal;
The first elastic part is supported by a first support part of the output terminal part,
The second elastic part is supported by a second support part of the terminal connection member,
The first support part and the second support part may be arranged to face each other.

[Application Example 8]
In Application Example 7,
The switch part is
A third elastic part having electrical conductivity supported on the opposite side of the first support part from the first elastic part;
A conductive fourth elastic portion supported on the opposite side of the second support portion from the second elastic portion;
A second conductive portion and a third conductive portion electrically connected to the first conductive portion;
And further
The second conductive portion is in contact with the third elastic portion in the inserted state,
The third conductive portion may contact the fourth elastic portion in the inserted state.

[Application Example 9]
In any one of Application Examples 1 to 8,
The switch unit may be electrically connected to the negative terminal.

[Application Example 10]
In any one of Application Examples 1 to 9,
A plurality of the storage cells are provided,
The plurality of power storage cells may be connected in series.

[Application Example 11]
In any one of Application Examples 1 to 10,
The storage cell may be a lithium ion capacitor.

[Application Example 12]
One aspect of the connection method of the electricity storage device according to the present invention is:
An electrical storage device comprising an electrical storage cell having a positive electrode terminal and a negative electrode terminal and an output terminal portion, and a connection method of the electrical storage device for electrically connecting the connected portion,
A first step of electrically connecting the output terminal portion and the connected portion in a state where one of the positive electrode terminal and the negative electrode terminal is electrically separated from the output terminal portion; ,
A second step of electrically connecting the electrode terminal and the output terminal after the first step;
Including
Electrical separation and connection between the electrode terminal and the output terminal portion are performed by a switch portion.

  The power storage device according to the present invention has a switch unit that can electrically separate and connect one of the positive electrode terminal and the negative electrode terminal and the output terminal unit. Thus, first, the output terminal portion and the connected portion can be electrically connected in a state where the electrode terminal and the output terminal portion are electrically separated. Thereafter, the electrode terminal and the output terminal portion can be electrically connected. Therefore, in the electricity storage device according to the present invention, the output terminal portion and the terminal of the connected portion are connected, and at the same time, no voltage is applied to the connected portion, and high safety can be achieved. For example, when connecting the output terminal of the electricity storage device and the terminal of the connected part, an operator may touch the terminal, and the output terminal of the electricity storage device and the terminal of the connected part are connected. At the same time, if a voltage is applied to the connected part, the safety is lowered.

The perspective view which shows typically the electrical storage device which concerns on 1st Embodiment. FIG. 3 is a cross-sectional view schematically showing the electricity storage device according to the first embodiment. Sectional drawing which shows typically the switch part vicinity of the electrical storage device which concerns on 1st Embodiment. Sectional drawing which shows typically the switch part vicinity of the electrical storage device which concerns on 1st Embodiment. The perspective view which shows typically the switch part vicinity of the electrical storage device which concerns on 1st Embodiment. Sectional drawing which shows typically the switch part vicinity of the electrical storage device which concerns on 1st Embodiment. Sectional drawing which shows typically the switch part vicinity of the electrical storage device which concerns on 1st Embodiment. The perspective view which shows typically the switch part vicinity of the electrical storage device which concerns on 1st Embodiment. The top view which shows typically the insulating member of the electrical storage device which concerns on 1st Embodiment. FIG. 3 is a cross-sectional view schematically showing a power storage cell of the power storage device according to the first embodiment. Sectional drawing which shows typically the electrical storage device which concerns on the modification of 1st Embodiment. The perspective view which shows typically the electrical storage device which concerns on 2nd Embodiment. The top view which shows typically the electrical storage device which concerns on 2nd Embodiment. Sectional drawing which shows typically the switch part vicinity of the electrical storage device which concerns on 2nd Embodiment. The cross-sectional perspective view which shows typically the switch part vicinity of the electrical storage device which concerns on 2nd Embodiment. Sectional drawing which shows typically the switch part vicinity of the electrical storage device which concerns on 2nd Embodiment. The cross-sectional perspective view which shows typically the switch part vicinity of the electrical storage device which concerns on 2nd Embodiment. The top view which shows typically the base of the electrical storage device which concerns on 2nd Embodiment. The top view which shows typically the insulating member of the electrical storage device which concerns on 2nd Embodiment. The top view which shows typically the electrical storage device which concerns on the modification of 2nd Embodiment. The top view which shows typically the electrical storage device which concerns on 3rd Embodiment. The top view which shows typically the electrical storage device which concerns on 3rd Embodiment. The perspective view which shows typically the electrical storage device which concerns on 3rd Embodiment. The top view which shows typically the electrical storage device which concerns on 3rd Embodiment. Sectional drawing which shows typically the electrical storage device which concerns on 3rd Embodiment. The perspective view which shows typically the 1st elastic member of the electrical storage device which concerns on 3rd Embodiment. The perspective view which shows typically the plug part of the electrical storage device which concerns on 3rd Embodiment.

  Preferred embodiments of the present invention will be described below with reference to the drawings.

1. 1. First embodiment 1.1. First, an electricity storage device according to the first embodiment will be described with reference to the drawings. FIG. 1 is a perspective view schematically showing an electricity storage device 100 according to the first embodiment. FIG. 2 is a cross-sectional view taken along line AA of FIG. 1 schematically showing the electricity storage device 100 according to the first embodiment.

  As shown in FIGS. 1 and 2, the power storage device 100 can include a power storage cell 10, a base 20, a lid 29, an output terminal unit 30, and a switch unit 40. In FIG. 2, for convenience, the illustration of the output terminal unit 30 is omitted, and the switch unit 40 is illustrated in a simplified manner.

  Examples of the storage cell 10 include a lithium ion capacitor and a secondary battery. The storage cell 10 can have an outer package 12, a positive electrode terminal 14, and a negative electrode terminal 16.

  The exterior body 12 contains a positive electrode, a negative electrode, and an electrolytic solution. The shape of the outer package 12 is not particularly limited as long as it can accommodate the positive electrode, the negative electrode, and the electrolytic solution, but in the example shown in FIG. 2, it is a laminate type in which two laminate films are bonded together. In FIG. 2, for convenience, the positive electrode, the negative electrode, and the like housed in the exterior body 12 are omitted.

  As the laminate film, for example, a metal foil such as an aluminum foil or a copper foil sandwiched between synthetic resins such as polypropylene or nylon can be used. By using such a film-shaped exterior body 12, for example, compared with the case where a hard exterior body (metal can etc.) which consists of metals etc. is used, size reduction and weight reduction of the electrical storage cell 10 can be achieved. .

  As shown in FIG. 2, the positive electrode terminal 14 and the negative electrode terminal 16 are provided so as to extend (project) from the exterior body 12. More specifically, the positive electrode terminal 14 and the negative electrode terminal 16 extend from the inside to the outside of the exterior body 12 in a state where the hermeticity of the exterior body 12 is maintained. The positive electrode terminal 14 and the negative electrode terminal 16 extend from the exterior body 12 in directions opposite to each other, for example. In the example shown in FIG. 2, the positive terminal 14 extends to the + Y axis side, and the negative terminal 16 extends to the −Y axis side. At least a part of the terminals 14 and 16 are exposed from the lid 29.

  The positive electrode terminal 14 is electrically connected to the positive electrode in the exterior body 12. The negative terminal 16 is electrically connected to the negative electrode in the exterior body 12. Examples of the material of the positive electrode terminal 16 include aluminum. Examples of the material of the negative electrode terminal 16 include copper and nickel. The internal structure of the exterior body 12 will be described later.

  The base 20 supports the storage cell 10. The shape of the base 20 is not particularly limited as long as the storage cell 10 can be supported. The material of the base 20 is not particularly limited as long as it is insulative, and examples thereof include a resin such as plastic.

  The lid 29 covers the storage cell 10. The shape of the lid 29 is not particularly limited as long as the storage cell 10 can be covered. Examples of the material of the lid 29 include metals such as aluminum, iron, and copper, and resins. However, considering the heat dissipation of the storage cell 10, a metal is preferable. The lid body 29 may be fixed to the base body 20. The storage cell 10 may be sandwiched between the lid 29 and the base body 20. In the illustrated example, the lid body 29 and the base body 20 sandwich the electricity storage cell 10 in the Z-axis direction.

  The switch unit 40 is electrically connected to one electrode terminal of the positive electrode terminal 14 and the negative electrode terminal 16. In the illustrated example, the switch unit 40 is electrically connected to the negative electrode terminal 16, but may be electrically connected to the positive electrode terminal 14. Two switch units 40 may be provided and electrically connected to both the positive terminal 14 and the negative terminal 16.

  Hereinafter, configurations of the switch unit 40 and the output terminal unit 30 will be described with reference to the drawings. FIG. 3 is a cross-sectional view schematically showing the vicinity of the switch unit 40 of the electricity storage device 100 according to the first embodiment. 4 is a cross-sectional view schematically showing the vicinity of the insertion portion 83 of the switch portion 40 shown in FIG. FIG. 5 is a perspective view schematically showing the vicinity of the switch unit 40 of the electricity storage device 100 according to the first embodiment. FIG. 6 is a cross-sectional view schematically showing the vicinity of the switch unit 40 of the electricity storage device 100 according to the first embodiment. FIG. 7 is a cross-sectional view schematically showing the vicinity of the insertion portion 83 of the switch portion 40 shown in FIG. FIG. 8 is a perspective view schematically showing the vicinity of the switch unit 40 of the electricity storage device 100 according to the first embodiment. 5 and 8, the base 20 and the lid 29 are not shown for convenience.

  The switch unit 40 can electrically separate and connect one electrode terminal of the positive electrode terminal 14 and the negative electrode terminal 16 and the output terminal unit 30. 3 to 5 show a state where the negative electrode terminal 16 and the output terminal portion 30 are electrically separated. 6 to 8 show a state where the negative electrode terminal 16 and the output terminal portion 30 are electrically connected.

  For example, the output terminal portion 30 is supported by the base body 20 while being exposed from the lid 29. Although the shape of the output terminal portion 30 is not particularly limited, in the illustrated example, the output terminal portion 30 includes the first portion 31 disposed in the opening portion 22 formed in the base body 20 and the conductive member of the switch portion 40. 50 and a third portion 33 connected to the contacted part 1000.

  Here, the connected part 1000 is an object to which the voltage of the power storage device 100 is applied, for example, and the form thereof is not particularly limited. Although not shown, more specifically, by connecting one terminal of the connected part 1000 to the output terminal part 30 and connecting the other terminal of the connected part 1000 to the positive electrode terminal 14, A voltage can be applied to the connected part 1000. For example, the power storage device 100 may be charged by electrically connecting the power storage device 100 and the connected portion 1000. In addition, in FIG.1, 2,5,8, illustration of the to-be-connected part 1000 is abbreviate | omitted for convenience.

  As shown in FIGS. 3 and 6, the first portion 31 has a shape that extends along, for example, the Z-axis and is caught by the opening 22 formed in the substrate 20. For example, the second portion 32 is continuous with the first portion 31 and extends along the Y axis. As shown in FIG. 3 and FIG. 6, openings 34 and 35 may be formed in the second portion 32. The openings 34 and 35 penetrate the second portion 32 along the Z axis. A screw portion 72 and a screw holder portion 60 are disposed in the opening 34. In the opening 35, the protruding portion 24 of the base body 20 is disposed. The protruding portion 24 of the substrate 20 is disposed in the opening 35 and the first portion 31 of the output terminal portion 30 is disposed in the opening 22 so that the output terminal portion 30 is supported by the base body 20. it can.

  For example, the third portion 33 is continuous with the second portion 32 and extends along the Z-axis. An opening 36 is formed in the third portion 33. For example, the opening 36 penetrates the third portion 33 along the Y axis. The third portion 33 can be connected to the connected portion 1000 by the opening 36. Although not shown, more specifically, the connected portion 1000 can be connected to the third portion 33 by screwing the terminal of the connected portion 1000 through the opening 36.

  Although the material of the output terminal part 30 will not be specifically limited if it is electroconductivity, For example, aluminum and copper are mentioned.

  For example, the switch unit 40 is supported by the base body 20 while being exposed from the lid 29. As shown in FIGS. 3 to 8, the switch unit 40 can include a conductive member 50, a holding unit 58, a screw holder unit 60, screw units 70 and 72, and an insulating member 80.

  The conductive member 50 is electrically connected to the negative electrode terminal 16. The conductive member 50 can have an electrode terminal contact portion 51 that contacts the negative electrode terminal 16. As shown in FIGS. 3 and 6, the electrode terminal contact portion 51 extends, for example, along the Z axis. In the illustrated example, the negative electrode terminal 16 includes a sandwiched portion 17 that is sandwiched between the electrode terminal contact portion 51 and the pressing portion 58. The sandwiched portion 17 extends, for example, along the Z axis. As shown in the figure, the clamped portion 17 is clamped by the electrode terminal contact portion 51 and the presser portion 58 and fixed to the electrode terminal contact portion 51, the clamped portion 17 and the presser portion 58 through the screw portion 70. The electrode terminal contact portion 51 and the sandwiched portion 17 can be brought into contact with each other more reliably.

  The material of the conductive member 50 is not particularly limited as long as it is conductive, and examples thereof include aluminum and copper. The material of the holding part 50 is not particularly limited, and may be conductive or insulating.

  The conductive member 50 further includes a curved portion 52 having a curved shape that is continuous with the electrode terminal contact portion 51, an extended portion 53 that is continuous with the curved portion 52 and extends along the Z axis, and is continuous with the extended portion 53. The output terminal contact portion 54 can be in contact with the output terminal portion 30.

  As shown in FIGS. 5 and 8, a slit portion 55 may be formed in the bending portion 52. As a result, the conductive member 50 can have a spring property and can easily move along the Z-axis as the screw portion 72 is tightened or loosened.

  As shown in FIGS. 3 and 6, the output terminal contact portion 54 extends, for example, along the Y axis, and is disposed above the second portion 32 (+ Z axis side) of the output terminal portion 30. In the example shown in FIGS. 3 and 4, the output terminal contact portion 54 is disposed to face the second portion 32 via the insertion portion 83 of the insulating member 80. In the example shown in FIGS. 6 and 7, the output terminal contact portion 54 is in contact with the second portion 32.

  As shown in FIGS. 4 and 6, an opening 56 is formed in the output terminal contact portion 54. The opening 56 penetrates the output terminal contact portion 54 along the Z axis. A screw holder portion 60 and a screw portion 72 are disposed in the opening 56.

  The shape of the conductive member 50 is not limited to the illustrated example. For example, the conductive member 50 may be formed integrally with the negative electrode terminal 16 or may be connected by welding or the like.

  The screw holder portion 60 is disposed, for example, on the upper surface (the surface on the + Z-axis side) of the output terminal contact portion 54 of the conductive member 50 and the opening 56. The output terminal contact part 54 may be fixed to the screw holder part 60. Thereby, when the screw holder part 60 moves along the Z-axis according to the tightening and loosening of the screw part 72, the output terminal contact part 54 can also move with the movement of the screw holder part 60. That is, it can be said that the conductive member 50 is fixed to the screw portion 72 via the screw holder portion 60.

  For example, an opening 62 is formed in the screw holder portion 60. The opening 62 penetrates the screw holder 60 along the Z axis, for example. A screw portion 72 is disposed in the opening 62. The shape of the screw holder portion 60 is not particularly limited as long as the screw portion 72 can be held in the opening 62.

  The material of the screw holder portion 60 is not particularly limited as long as it is insulating, and examples thereof include thermosetting resins such as phenol resins and melamine resins. By using a thermosetting resin as the screw holder portion 60, even if the conductive member 50 generates heat by passing an electric current, the shape of the screw holder portion 60 can be stably maintained.

  The screw portion 72 includes, for example, an opening 62 formed in the screw holder portion 60, an opening 56 formed in the conductive member 50, an opening 34 formed in the output terminal portion 30, and an opening formed in the base body 20. Arranged in the portion 26. In the example shown in FIGS. 3 and 6, the screw portion 72 passes through the screw holder portion 60, the output terminal contact portion 54 of the conductive member 50, the second portion 32 of the output terminal portion 30, and the base 20, and the screw portion 72. A nut 76 is attached to the front end portion 74. The screw portion 72 can move along the Z-axis by tightening or loosening.

  The insulating member 80 is supported on the base body 20, for example. The insulating member 80 may be disposed on the second portion 32 (+ Z axis side) of the output terminal portion 30. The material of the insulating member 80 is not particularly limited as long as it is insulative, and examples thereof include thermosetting resins such as phenol resins and melamine resins. By using a thermosetting resin as the insulating member portion 80, the shape of the insulating member 80 can be stably maintained even if the output terminal portion 30 and the conductive member 50 generate heat by passing a current.

  The insulating member 80 can include a cylindrical portion 81, a knob portion 82, and an insertion portion 83. For example, an opening 84 is formed in the cylindrical portion 81. The opening 84 penetrates the cylindrical portion 81 along the Z axis. The protrusion 24 of the base body 20 is inserted into the opening 84. The protruding portion 24 extends along the Z axis. The insulating member 80 can rotate around the protrusion 24.

  The knob portion 82 is attached to the upper end portion (+ Z axis side) of the cylindrical portion 81. The insertion portion 83 is attached to the lower end portion (−Z axis side) of the cylindrical portion 81. Here, FIG. 9 is a plan view schematically showing the insulating member 80 of the electricity storage device 100 according to the first embodiment, as viewed from the Z-axis direction. As shown in FIG. 9, the knob portion 82 and the insertion portion 83 do not overlap when viewed from the Z-axis direction. In the illustrated example, the extending direction of the knob portion 82 and the extending direction of the insertion portion 83 are orthogonal to each other.

  By applying a force to the knob portion 82 and rotating the insulating member 80 about the protruding portion 24, the insertion portion 83 is connected to the output terminal contact portion 54 of the conductive member 50 and the second portion 32 of the output terminal portion 30. Can be inserted and removed (can be inserted / removed). As shown in FIGS. 8 and 9, the side surface 83a of the insertion portion 83 may have a tapered shape. Accordingly, the insertion portion 83 can be easily inserted between the output terminal contact portion 54 of the conductive member 50 and the second portion 32 of the output terminal portion 30.

  As shown in FIGS. 3 to 5, in the first state in which the insertion portion 83 of the insulating member 80 is inserted between the conductive member 50 and the output terminal portion 30, the negative electrode terminal 16 and the output terminal portion 30 are electrically connected. Separated. That is, in the first state, the insulating member 80 prevents the conductive member 50 and the output terminal portion 30 from contacting each other.

  As shown in FIGS. 6 to 8, the conductive member 50 and the output terminal portion 30 are in contact with each other in the second state in which the insertion portion 83 of the insulating member 80 is detached from between the conductive member 50 and the output terminal portion 30. Can. Thereby, the negative electrode terminal 16 and the output terminal part 30 can be electrically connected.

  The shape and arrangement of the insulating member 80 are not particularly limited as long as the insulating member 80 can be inserted and removed between the output terminal contact portion 54 of the conductive member 50 and the second portion 32 of the output terminal portion 30. For example, the insulating member 80 is not rotatably disposed, but is disposed so as to be movable along the Y axis, whereby the output terminal contact portion 54 of the conductive member 50 and the second portion of the output terminal portion 30. 32 may be removable. That is, the insulating member 80 may be inserted between the output terminal contact portion 54 and the second portion 32 by sliding along the Y axis.

  Next, a connection method for electrically connecting the electricity storage device 100 to the connected part 1000 will be described.

  First, as shown in FIGS. 3 to 5, the output terminal portion 30 and the connected portion 1000 are electrically connected in a state where the negative electrode terminal 16 and the output terminal portion 30 are electrically separated (first state). Connect (first step). Although not shown, the positive terminal 14 and the connected part 1000 are electrically connected. In the first state, as described above, the insertion portion 83 of the insulating member 80 is inserted between the output terminal contact portion 54 of the conductive member 50 and the second portion 32 of the output terminal portion 30. In the first state, even if the screw portion 72 is tightened, the screw portion 72 is not moved in the Z-axis direction (−Z-axis direction) by the insertion portion 83 of the insulating member 80.

  Next, as shown in FIGS. 6-8, the negative electrode terminal 16 and the output terminal part 30 are electrically connected (2nd process). Electrical connection between the negative electrode terminal 16 and the output terminal unit 30 is performed by the switch unit 40. More specifically, a force is applied to the knob portion 82 to rotate the insulating member 80 around the protruding portion 24, and the insertion portion 83 is removed from between the conductive member 50 and the output terminal portion 30. (Second state). Thereby, it becomes possible to contact the output terminal contact part 54 of the electrically-conductive member 50, and the 2nd part 32 of the output terminal part 30, and electrical connection is attained. Thereafter, the screw portion 72 is tightened to move the screw portion 72 in the Z-axis direction (−Z-axis direction). As the screw portion 72 moves, the screw holder portion 60 and the output terminal contact portion 54 of the conductive member 50 move in the Z-axis direction (−Z-axis direction). Thereby, the output terminal contact portion 54 of the conductive member 50 can be brought into contact with the second portion 32 of the output terminal portion 30 more reliably. Therefore, the negative electrode terminal 16 and the output terminal part 30 can be electrically connected, and as a result, the electricity storage cell 10 (the electricity storage device 100) and the connected part 1000 can be electrically connected.

  Although not shown, the switch portion 40 does not have the screw portion 72. For example, after the insertion portion 83 is removed from between the conductive member 50 and the output terminal portion 30, the conductive member 50 is output by a spring member or the like. The conductive member 50 may be brought into contact with the output terminal portion 30 by pressing the terminal contact portion 54 in the Z-axis direction (−Z-axis direction). Thus, the mechanism for moving the output terminal contact portion 54 in the Z-axis direction after removing the insertion portion 83 from between the conductive member 50 and the output terminal portion 30 is not particularly limited.

  Next, the internal structure of the electricity storage cell 10 of the electricity storage device 100 will be described. FIG. 10 is a cross-sectional view showing the storage cell 10, and is a cross-sectional view schematically showing the internal structure (of the outer package 12) of the storage cell 10. Below, the case where the electrical storage cell 10 is a lithium ion capacitor is demonstrated as an example.

  The electrical storage cell 10 can have the electrode laminated body 5 accommodated in the exterior body 12, and electrolyte solution (not shown), as shown in FIG. In the illustrated example, the electrode laminate 5 and the electrolytic solution are accommodated in an exterior body 12 composed of a first laminate film 12a and a second laminate film 12b.

  The electrode laminate 5 is immersed in the electrolytic solution. The electrode laminate 5 can include a positive electrode 1, a negative electrode 2, a lithium electrode 3, and a separator 4. The positive electrode 1, the negative electrode 2, the lithium electrode 3, and the separator 4 can have a sheet-like shape. In the illustrated example, the electrode laminate 5 is laminated in the order of the lithium electrode 3, the negative electrode 2, the positive electrode 1, the negative electrode 2, the positive electrode 1, the negative electrode 2, and the lithium electrode 3 from the first laminate film 12 a side. And a separator 4 between the electrode and the laminate film. In the electrode laminate 5, the positive electrode 1 and the negative electrode 2 are connected in parallel.

  The number of positive electrodes 1 and negative electrodes 2 is not particularly limited. Similarly, the number of lithium electrodes 3 and the installation location are not particularly limited. Moreover, the form of the electrode laminated body 5 is not limited to the example of illustration, For example, the positive electrode, the negative electrode, the lithium electrode, and the separator are laminated | stacked, a laminated sheet is formed, and this laminated sheet is wound and formed. But you can.

  The positive electrode 1 can include a positive electrode current collector 1a and a positive electrode active material layer 1b. As the positive electrode current collector 1a, a porous metal foil can be used. Examples of the material of the positive electrode current collector 1a include aluminum and stainless steel. The thickness of the positive electrode current collector 1a is, for example, 15 μm or more and 50 μm or less. The positive electrode current collector 1 a is connected to the positive electrode terminal 14 through the positive electrode lead 6. The material of the positive electrode lead 6 is, for example, the same as the material of the positive electrode current collector 1a.

  The positive electrode active material layer 1b is formed on the positive electrode current collector 1a. In the illustrated example, the positive electrode active material layer 1b is formed on both surfaces of the positive electrode current collector 1a, but may be formed only on one surface. The thickness of the positive electrode active material layer 1b is, for example, not less than 60 μm and not more than 120 μm.

The positive electrode active material layer 1b contains a positive electrode active material. The positive electrode active material is a material that can reversibly support anions such as hexafluorophosphate (PF ₆ ⁻ ) and tetrafluoroborate (BF ₄ ⁻ ). More specifically, examples of the positive electrode active material include activated carbon and a polyacene-based material (PAS) that is a heat-treated product of an aromatic condensation polymer.

  As a method for forming the positive electrode active material layer 1b, first, a positive electrode active material powder and a binder are dispersed in an aqueous medium or an organic solvent to prepare a slurry. You may mix electroconductive powder as needed. Next, the adjusted slurry is applied to the surface of the positive electrode current collector 1a and dried. Thus, the positive electrode active material layer 1b can be obtained.

  The negative electrode 2 can have a negative electrode current collector 2a and a negative electrode active material layer 2b. As the negative electrode current collector 2a, a porous metal foil can be used. Examples of the material of the negative electrode current collector 2a include copper, stainless steel, and nickel. The thickness of the negative electrode current collector 2a is, for example, 10 μm or more and 50 μm or less. The negative electrode current collector 2 a is connected to the negative electrode terminal 16 through the negative electrode lead 7. The material of the negative electrode lead 7 is the same as the material of the negative electrode current collector 2a, for example.

  The negative electrode active material layer 2b is formed on the negative electrode current collector 2a. In the illustrated example, the negative electrode active material layer 2b is formed on both surfaces of the negative electrode current collector 2a, but may be formed only on one surface. The thickness of the negative electrode active material layer 2b is, for example, 20 μm or more and 50 μm or less.

  The negative electrode active material layer 2b contains a negative electrode active material. The negative electrode active material is a material that can reversibly store lithium ions. More specifically, examples of the negative electrode active material include graphite (graphite), non-graphitizable carbon (hard carbon), and pulverized products thereof.

  As a method for forming the negative electrode active material layer 2b, first, a negative electrode active material powder and a binder are dispersed in an aqueous medium or an organic solvent to prepare a slurry. You may mix electroconductive powder as needed. Next, the adjusted slurry is applied to the surface of the negative electrode current collector 2a and dried. In this way, the negative electrode active material layer 2b can be obtained.

  The lithium electrode 3 includes a lithium electrode current collector 3a and a lithium foil 3b. As the lithium electrode current collector 3a, a porous metal foil can be used. Examples of the material of the lithium electrode current collector 3a include copper and stainless steel. The thickness of the lithium electrode current collector 3a is, for example, not less than 10 μm and not more than 200 μm.

  The lithium foil 3b is, for example, pressure bonded to one surface of the lithium electrode current collector 3a. The material of the lithium foil 3b is lithium. The lithium foil 3b can function as a lithium ion supply source. That is, when the lithium electrode current collector 3a and the negative electrode current collector 2a are connected via the negative electrode lead 7 and short-circuited, the lithium foil 3b can be dissolved in the electrolytic solution and become lithium ions. Then, the lithium ions are electrochemically doped into the negative electrode active material layer 2b (also referred to as “pre-dope”) via the electrolytic solution. As a result, the potential of the negative electrode 2 can be lowered. Thereby, an energy density can be enlarged. The thickness of the lithium foil 3b is, for example, 50 μm or more and 300 μm or less.

  Note that the lithium foil 3b is completely dissolved in the electrolytic solution by pre-doping, for example, but in the illustrated example, the electrolytic solution is omitted for convenience and the lithium foil 3b before being dissolved in the electrolytic solution is illustrated. .

As the electrolytic solution, an aprotic organic solvent electrolyte solution containing lithium salt as an electrolyte can be used. Examples of the aprotic organic solvent include ethylene carbonate, propylene carbonate, dimethyl carbonate, diethyl carbonate, γ-butyrolactone, acetonitrile, dimethoxyethane, tetrahydrofuran, dioxolane, methylene chloride, sulfolane and the like. These solvents may be used alone or in combination of two or more. Examples of the lithium salt include LiPF ₆ , LiBF ₄ , LiClO ₄ , LiAsF ₆ , Li (C ₂ F ₅ SO ₂ ) ₂ N, and the like.

  For the separator 4, a porous material having durability against the positive electrode active material, the negative electrode active material, and the electrolyte can be used. As the separator 4, a nonwoven fabric made of cellulose, rayon, polyethylene, polypropylene, aramid resin, amideimide, polyphenylene sulfide, polyimide, or the like, a porous film, or the like can be used. The thickness of the separator 4 is 20 μm or more and 50 μm or less, for example. The separator can isolate between the positive electrode 1 and the negative electrode 2 or between the negative electrode 2 and the lithium electrode 3. Further, the separator 4 can infiltrate the electrolyte.

  The electricity storage device 100 according to the first embodiment has the following features, for example.

  The power storage device 100 includes the switch unit 40 that can electrically separate and connect one electrode terminal of the positive electrode terminal 14 and the negative electrode terminal 16 and the output terminal unit 30. Thereby, first, for example, in a state where the negative electrode terminal 16 and the output terminal portion 30 are electrically separated, the output terminal portion 30 and the connected portion 1000 can be electrically connected. Thereafter, the negative electrode terminal 16 and the output terminal portion 30 can be electrically connected. Therefore, in the electrical storage device 100, the output terminal portion and the terminal of the connected portion are connected, and at the same time, no voltage is applied to the connected portion, and high safety can be achieved. That is, in the electricity storage device 100, for example, even when the operator touches the terminal when connecting the output terminal unit 30 and the terminal of the connected unit 1000, the output terminal unit 30 and the connected unit 1000 are connected. Since a voltage is not applied to the connected portion 1000 at the same time as connecting the terminal, high safety can be achieved.

  According to the electricity storage device 100, the switch unit 40 can be connected to the negative electrode terminal 16. Since the negative electrode terminal 16 has a lower potential than the positive electrode terminal 14, the electrical connection between the power storage device 100 and the connected portion 1000 can be performed more safely.

1.2. Modified Example of First Embodiment Next, an electricity storage device according to a modified example of the first embodiment will be described with reference to the drawings. FIG. 11 is a cross-sectional view schematically showing an electricity storage device 200 according to a modification of the first embodiment, and corresponds to FIG. Hereinafter, in the electricity storage device 200 according to the modification of the first embodiment, members having the same functions as those of the components of the electricity storage device 100 according to the first embodiment are denoted by the same reference numerals, and detailed description thereof is given. Is omitted.

  In FIG. 11, for convenience, the switch unit 40 is illustrated in a simplified manner. In FIG. 11, for the sake of convenience, the output terminal portion 30, the positive electrode and the negative electrode accommodated in the exterior body 12, and the connected portion 1000 are not shown.

  In the example of the electricity storage device 100, as shown in FIG. On the other hand, the electricity storage device 200 has a plurality of electricity storage cells 10 as shown in FIG.

  In the illustrated example, four power storage cells 10 are provided, but the number is not particularly limited, and can be arbitrarily changed according to the application of the power storage cell 200. The plurality of power storage cells 10 are stacked, for example, along the Z axis, and a base body 20 and a lid 29 are disposed between adjacent power storage cells 10. The positive electrode terminal 14 and the negative electrode terminal 16 of the adjacent energy storage cells 10 are electrically connected so that the plurality of energy storage cells 10 are connected in series. The connection method of the positive electrode terminal 14 and the negative electrode terminal 16 of the adjacent electrical storage cell 10 is not specifically limited, For example, it can connect using a screw | thread etc. (not shown).

  According to the electricity storage device 200, higher output can be achieved compared to the electricity storage device 100. Thus, even the power storage device 200 capable of achieving high output can be safely and electrically connected to the connected part by the switch part 40.

2. Second Embodiment 2.1. Next, an electricity storage device according to a second embodiment will be described with reference to the drawings. FIG. 12 is a perspective view schematically showing the electricity storage device 300 according to the second embodiment. FIG. 13 is a plan view schematically showing the electricity storage device 300 according to the second embodiment, as viewed from the Z-axis direction.

  As shown in FIGS. 12 and 13, the electricity storage device 300 can include an electricity storage cell 310, an output terminal portion 320, and a switch portion 330.

  Examples of the storage cell 310 include a lithium ion capacitor and a secondary battery. The power storage cell 310 can include an exterior body 312, a positive electrode terminal 316, and a negative electrode terminal 317.

  The exterior body 312 contains a positive electrode, a negative electrode, and an electrolytic solution. When the storage cell 310 is a lithium ion capacitor, the exterior body 312 further accommodates a lithium electrode. Furthermore, the exterior body 312 may accommodate a separator. The positive electrode, the negative electrode, the lithium electrode, and the separator can have a sheet shape. As described in the example of the power storage device 100, the power storage device 300 may form a stacked electrode stack by stacking a positive electrode, a negative electrode, a lithium electrode, and a separator. Moreover, the form of the electrode laminate may be, for example, a wound type in which a positive electrode, a negative electrode, a lithium electrode, and a separator are stacked to form a laminated sheet, and the laminated sheet is wound. In the electricity storage device 300, the description of the example of the electricity storage device 100 described above can be applied to the positive electrode, the negative electrode, the lithium electrode, the separator, and the material and manufacturing method of the electrolytic solution.

  The shape of the exterior body 312 is not particularly limited as long as it can accommodate the positive electrode, the negative electrode, the electrolytic solution, and the like. In the illustrated example, the exterior body 312 includes an exterior can 313 and a sealing plate 314.

  The outer can 313 has a thickness (for example, a length along the X axis) smaller than a horizontal width (for example, a length along the Y axis) and a vertical width (for example, a length along the Z axis), and chamfers the corners of the four corners. Alternatively, it can have a curved, generally box-shaped shape. Examples of the material of the outer can 313 include aluminum, stainless steel, and iron. Although not shown, the outer can 313 may be cylindrical.

  The sealing plate 314 can seal the opening of the outer can 313. Accordingly, the positive electrode, the negative electrode, the electrolytic solution, and the like can be sealed in the outer package 312. The shape of the sealing plate 314 is not particularly limited as long as the opening of the outer can 313 can be sealed. Examples of the material of the sealing plate 314 include aluminum, stainless steel, and iron.

  A safety valve 315 is provided on the sealing plate 314. In the illustrated example, the safety valve 315 is arranged at the center of the sealing plate 314. The safety valve 315 can be opened when the pressure in the exterior body 312 rises above a predetermined value, and can release the gas in the exterior body 312. By opening the safety valve 315, an increase in pressure in the exterior body 312 can be suppressed.

  The positive terminal 316 is provided on the sealing plate 314. The shape of the positive electrode terminal 316 is not particularly limited, but is a bolt shape in the illustrated example. An example of the material of the positive electrode terminal 316 is aluminum. The positive terminal 315 is electrically connected to the positive electrode in the exterior body 312.

  The negative terminal 317 is provided on the sealing plate 314. The shape of the negative electrode terminal 317 is not particularly limited, but is a bolt shape in the illustrated example. Examples of the material of the negative electrode terminal 317 include copper and nickel. The negative terminal 317 is electrically connected to the negative electrode in the exterior body 312.

  The switch part 330 is electrically connected to one of the positive electrode terminal 316 and the negative electrode terminal 317. In the illustrated example, the switch unit 330 is electrically connected to the negative terminal 317, but may be electrically connected to the positive terminal 316. Two switch units 330 may be provided and electrically connected to both the positive terminal 316 and the negative terminal 317. In the illustrated example, the switch unit 330 is supported by a sealing plate 314 in the vicinity of the negative electrode terminal 317.

  Hereinafter, configurations of the switch unit 330 and the output terminal unit 320 will be described with reference to the drawings. FIG. 14 is a cross-sectional view taken along line BB in FIG. 13 schematically showing the vicinity of the switch unit 330 of the electricity storage device 300 according to the second embodiment. FIG. 15 is a cross-sectional perspective view schematically showing the vicinity of the switch unit 330 of the electricity storage device 300 according to the second embodiment. 16 is a cross-sectional view taken along the line BB in FIG. 13 schematically showing the vicinity of the switch unit 330 of the electricity storage device 300 according to the second embodiment. FIG. 17 is a cross-sectional perspective view schematically showing the vicinity of the switch unit 330 of the electricity storage device 300 according to the second embodiment.

  The switch unit 330 can electrically separate and connect one electrode terminal of the positive electrode terminal 316 and the negative electrode terminal 317 and the output terminal unit 320. 14 and 15 show a state where the negative electrode terminal 317 and the output terminal portion 320 are electrically separated. 16 and 17 show a state where the negative electrode terminal 317 and the output terminal portion 320 are electrically connected.

  As shown in FIGS. 12 to 17, the switch part 330 can include a conductive member 340, a base part 350, an insulating member 360, a knob part 370, and a screw part 380. 15 and 17, the conductive member 340 is not shown for convenience.

  As shown in FIGS. 14 and 16, the conductive member 340 is supported by a sealing plate 314, for example. The material of the conductive member 340 is not particularly limited as long as it is conductive, and examples thereof include aluminum and copper. As shown in FIGS. 12 and 13, the conductive member 340 can have an electrode connection portion 341 connected to the negative electrode terminal 317. In the illustrated example, after the electrode connection portion 341 is disposed on the sealing plate 314, the electrode connection portion 314 and the negative electrode terminal 317 are electrically connected by tightening the nut of the negative electrode terminal 317. Although not shown, the electrode connecting portion 314 may be welded to the negative electrode terminal 317.

  As shown in FIGS. 14 and 16, the conductive member 340 further includes a support portion 342 that is electrically connected to the electrode connection portion 341, and an extension portion that is continuous with the support portion 342 and extends along the Z axis. 343 and an output terminal contact portion 344 that is continuous with the extending portion 343 and can contact the output terminal portion 320.

  In the example illustrated in FIGS. 14 and 16, the support portion 342 extends along the X axis. The support part 342 may be connected to the electrode connection part 341 via the wiring part 346. The support part 342 may be connected to the wiring part 346 by welding or screwing, for example. The support part 342, the electrode connection part 341, and the wiring part 346 may be integrally formed. Moreover, the extending part 343 may be connected to the electrode connecting part 341 as shown in FIG.

  In the example shown in FIGS. 14 and 16, the output terminal contact portion 344 extends along the X axis. The output terminal contact portion 344 and the support portion 342 may be disposed to face each other via the base portion 350. The output terminal contact portion 344 can be separated from the output terminal portion 320 (see FIG. 14) or in contact (see FIG. 16) by the rotation of the insulating member 360. For example, an opening 345 is formed in the output terminal contact portion 344. An insulating member 360 and a screw portion 380 are disposed in the opening 345.

  The base portion 350 can support the output terminal portion 320 and the insulating member 360. As shown in FIGS. 14 and 16, a part of the base portion 350 may be sandwiched between the output terminal contact portion 344 and the support portion 342 of the conductive member 340. The output terminal contact portion 344 may be fixed to the base portion 350 by, for example, a screw (not shown).

  As shown in FIGS. 14 to 17, the base portion 350 may be provided with a housing portion 351 in which a terminal (not shown) of the connected portion 3000 is housed. More specifically, the accommodating portion 351 can accommodate the terminal of the connected portion 3000 that passes through the opening 325 formed in the output terminal portion 320.

  Here, the connected part 3000 is, for example, an object to which the voltage of the power storage device 300 is applied, and the form thereof is not particularly limited. Although not shown, more specifically, one terminal of the connected part 3000 is connected to the output terminal part 320, and the other terminal of the connected part 3000 is connected to the positive terminal 316. A voltage can be applied to the connected part 3000. For example, the power storage device 300 may be charged by electrically connecting the power storage device 300 and the connected portion 3000. 12, 13, 15, and 17, the connected part 3000 is not shown for convenience.

  As shown in FIGS. 14 and 16, an opening 352 may be formed in the base 350. For example, the opening 352 penetrates the base 350 along the Z-axis. The third portion 323 of the output terminal portion 320 is accommodated in the opening 352. The shape of the opening 352 is such that the third portion 323 is caught. As a result, the base 350 can support the output terminal portion 320.

  An opening 353 may be further formed in the base 350. For example, the opening 353 penetrates the base 350 along the Z-axis. The opening 353 communicates with, for example, the opening 345 formed in the conductive member 340. A screw part 380 is disposed in the opening 353.

  The base 350 can have a placement portion 354. As shown in FIG. 15 and FIG. 17, the mounting portion 354 can have a first uneven portion 355 composed of a concave portion 355 a and a convex portion 355 b. Here, FIG. 18 is a plan view schematically showing the vicinity of the mounting portion 354 of the base portion 350, as viewed from the Z-axis direction. As shown in FIG. 18, the mounting portion 354 is formed around a circular opening 353. In the example shown in FIG. 18, the first concavo-convex portion 355 of the mounting portion 354 is configured by two concave portions 355a and two convex portions 355b, but the number of the concave portions 355a and the convex portions 355b is particularly It is not limited. The mounting portion 354 can mount the insulating member 360.

  The material of the base 350 is not particularly limited as long as it is insulative, and examples thereof include thermosetting resins such as phenol resins and melamine resins. By using a thermosetting resin as the base 350, the shape of the base 350 can be stably maintained even if the conductive member 340 and the output terminal 320 are heated by flowing current.

  As shown in FIGS. 14 to 17, the insulating member 360 is mounted on the mounting portion 354 of the base portion 350. As shown in FIGS. 14 and 16, an opening 361 may be formed in the insulating member 360. A screw portion 380 is disposed in the opening 361, and the insulating member 360 is disposed so as to be rotatable about the screw portion 380. It can be said that the insulating member 360 is rotatably attached to the screw portion 380.

  As shown in FIGS. 15 and 17, the insulating member 360 can have a second concavo-convex portion 362 composed of a concave portion 362 a and a convex portion 362 b. The second concavo-convex portion 362 is provided at the lower end portion of the insulating member 360 that contacts the placement portion 354. Here, FIG. 19 is a plan view schematically showing the insulating member 360 as viewed from the Z-axis direction. As shown in FIG. 19, it is formed around a circular opening 361. The second uneven portion 362 of the insulating member 360 can have a shape that can be engaged with the first uneven portion 355 of the mounting portion 354. That is, the number of concave portions 362 a of the second uneven portion 362 is the same as the number of concave portions 355 a of the first uneven portion 355, and the number of convex portions 362 b of the second uneven portion 362 is the convex portion of the first uneven portion 355. It is the same as the number of 355b. In the example illustrated in FIG. 19, the second uneven portion 362 includes two concave portions 362 a and two convex portions 362 b.

  14 and 15 show a state in which the convex portion 355b of the first uneven portion 355 and the convex portion 362b of the second uneven portion 362 are in contact with each other (first state). 16 and 17 show that the convex portion 355b of the first concave-convex portion 355 and the concave portion 362a of the second concave-convex portion 362 are in contact, and the concave portion 355a of the first concave-convex portion 355 and the convex portion 362b of the second concave-convex portion 362 Are in contact with each other (second state). As described above, when the insulating member 360 rotates about the screw portion 380, the first state can be shifted to the second state, and the second state can be shifted to the first state.

  As shown in FIGS. 14 and 16, the insulating member 360 can have a stepped portion 363. The step portion 363 may be formed along the outer surface of the insulating member 360 having a substantially cylindrical shape. As shown in FIG. 14, the stepped portion 363 can support the output terminal portion 320 so that the conductive member 340 and the output terminal portion 320 are separated from each other in the first state. The stepped portion 363 supports the output terminal portion 320 so that the insulating member 360 can rotate with respect to the output terminal portion 320. That is, for example, even if the insulating member 360 rotates, the output terminal portion 320 does not rotate.

  The knob part 370 is fixed to the insulating member 360. In the example shown in FIGS. 14 to 17, the knob portion 370 is fixed to the upper end portion of the insulating member 360 opposite to the lower end portion where the second uneven portion 362 is provided. As shown in FIGS. 14 and 17, the knob portion 370 has an opening 371, and the insulating member 360 and the screw portion 380 are disposed in the opening 371. The knob portion 370 is disposed so as to be rotatable about the screw portion 380 as an axis. That is, by applying a force to the knob portion 370, the insulating member 360 fixed to the knob portion 370 can be rotated.

  The material of the insulating member 360 and the knob portion 370 is not particularly limited as long as it is insulative, and examples thereof include thermosetting resins such as phenol resins and melamine resins. Thereby, even if the output terminal portion 320 generates heat due to an electric current, the shapes of the insulating member 360 and the knob portion 370 can be stably maintained.

  The screw portion 380 is disposed, for example, in an opening 361 formed in the insulating member 360 and an opening 353 formed in the base body 350. In the example shown in FIGS. 14 and 16, the screw portion 380 penetrates the knob portion 370, the insulating member 360, the first portion 321 of the output terminal portion 320, the output terminal contact portion 344 of the conductive member 340, and the mounting portion 354. A nut 384 is attached to the tip portion 382 of the screw portion 380.

  The output terminal portion 320 is supported by the insulating member 360 and the base portion 350. The shape of the output terminal portion 320 is not particularly limited. However, in the illustrated example, the output terminal portion 320 is connected to the first portion 321 supported by the insulating member 360, the first portion 321 and the connected portion 3000. A second portion 322 connected to each other and a third portion 323 that is continuous with the second portion 322 and supported by the base 350.

  The first portion 321 is supported by the step portion 363 of the insulating member 360. In the example illustrated in FIG. 16, the first portion 321 extends along the X axis. For example, an opening 324 is formed in the first portion 321. An insulating member 360 and a screw portion 380 are disposed in the opening 324. As shown in FIGS. 16 and 17, the first portion 321 can contact the output terminal contact portion 344 of the conductive member 340. More specifically, the lower surface (the surface on the −Z axis side) of the first portion 321 can contact the upper surface (the surface on the + Z axis side) of the output terminal contact portion 344. A knob portion 370 may be disposed on the upper surface (the surface on the + Z-axis side) of the first portion 321.

  Although not shown, an insulating sheet may be formed on the upper surface of the first portion 321. Thereby, a force can be applied to the knob part 370 to increase safety when the knob part 370 and the insulating member 360 are rotated. Examples of the material for the insulating sheet include polypropylene, epoxy resin, and polyimide.

  An opening 325 is formed in the second portion 322. The second portion 322 can be electrically connected to the connected portion 3000 by the opening 325. Although not shown, more specifically, the connected portion 3000 can be connected to the second portion 322 by screwing the terminal of the connected portion 3000 through the opening 325. In the example illustrated in FIG. 16, the second portion 322 extends along the X axis. As shown in FIG. 16, the second portion 322 is located on the + Z axis side from the first portion 321.

  The third portion 323 has a shape that can be caught in an opening 352 formed in the base 350. By rotating the insulating member 360, the first portion 321 can be displaced along the Z axis (almost along the Z axis) with the third portion 323 as a fulcrum. Thereby, the first portion 321 can be separated from or brought into contact with the output terminal contact portion 344 of the conductive member 340.

  Although the material of the output terminal part 320 will not be specifically limited if it is electroconductivity, For example, aluminum and copper can be mentioned.

  Next, a connection method for electrically connecting the electricity storage device 300 to the connected part 3000 will be described.

  First, as shown in FIGS. 14 and 15, the output terminal portion 320 and the connected portion 3000 are electrically connected in a state where the negative electrode terminal 317 and the output terminal portion 320 are electrically separated (first state). Connect (first step). Although not shown, the positive terminal 316 and the connected portion 3000 are electrically connected. In the first state, as described above, the convex portion 355b of the first uneven portion 355 and the convex portion 362b of the second uneven portion 362 are in contact with each other. Therefore, the output terminal portion 320 is separated from the conductive member 340.

  Next, as shown in FIGS. 16 and 17, the negative electrode terminal 317 and the output terminal portion 320 are electrically connected (second step). Electrical connection between the negative terminal 317 and the output terminal unit 320 is performed by the switch unit 330. More specifically, a force is applied to the knob portion 370 to rotate the insulating member 360 around the screw portion 380 as an axis. Then, the convex portion 355b of the first concave and convex portion 355 and the concave portion 362a of the second concave and convex portion 362 are brought into contact with each other, and the concave portion 355a of the first concave and convex portion 355 and the convex portion 362b of the second concave and convex portion 362 are brought into contact with each other. (Second state). Accordingly, the first portion 321 of the output terminal portion 320 can be displaced toward the output terminal contact portion 344 side (to the −Z axis side) of the conductive member 340 so that the output terminal portion 320 and the conductive member 340 can be brought into contact with each other. . Therefore, the negative electrode terminal 317 and the output terminal portion 320 can be electrically connected, and as a result, the power storage cell 310 (power storage device 300) and the connected portion 3000 can be electrically connected. Furthermore, the screw portion 380 can more reliably make contact between the output terminal contact portion 344 of the conductive member 340 and the first portion 321 of the output terminal portion 320.

  The power storage device 300 according to the second embodiment has the following features, for example.

  The power storage device 300 includes the switch unit 330 that can electrically separate and connect one electrode terminal of the positive electrode terminal 316 and the negative electrode terminal 317 and the output terminal unit 320. Thereby, first, for example, the output terminal portion 320 and the connected portion 3000 can be electrically connected in a state where the negative electrode terminal 317 and the output terminal portion 320 are electrically separated. Thereafter, the negative electrode terminal 317 and the output terminal portion 320 can be electrically connected. Therefore, in the electricity storage device 300, the output terminal portion and the terminal of the connected portion are connected, and at the same time, no voltage is applied to the connected portion, and high safety can be achieved. That is, in the electricity storage device 300, for example, even when the operator touches the terminal when connecting the output terminal unit 320 and the terminal of the connected unit 3000, the output terminal unit 320 and the connected unit 3000 are connected. Since a voltage is not applied to the connected part 3000 at the same time as the terminal is connected, high safety can be achieved.

  According to the electricity storage device 300, the switch unit 330 can be connected to the negative electrode terminal 317. Since the potential of the negative electrode terminal 317 is lower than that of the positive electrode terminal 316, the electrical connection between the power storage device 300 and the connected portion 3000 can be performed more safely.

2.2. Next, a power storage device according to a modification of the second embodiment will be described with reference to the drawings. FIG. 20 is a cross-sectional view schematically showing an electricity storage device 400 according to a modification of the second embodiment, and corresponds to FIG. Hereinafter, in the electricity storage device 400 according to the modification of the second embodiment, members having the same functions as those of the components of the electricity storage device 300 according to the second embodiment are denoted by the same reference numerals, and detailed description thereof is given. Is omitted. In FIG. 20, the connected portion 3000 is not shown for convenience.

  The example of the electricity storage device 300 has one electricity storage cell 310 as shown in FIG. On the other hand, the electricity storage device 400 includes a plurality of electricity storage cells 310 as shown in FIG.

  In the illustrated example, four storage cells 310 are provided, but the number thereof is not particularly limited, and can be arbitrarily changed according to the use of the storage cell 400. The plurality of power storage cells 310 are stacked, for example, along the X axis, and a separator 410 is disposed between adjacent power storage cells 10. Examples of the material of the separator 410 include a resin such as plastic. Separator 410 can insulate adjacent storage cells 310 electrically and thermally.

  The positive electrode terminal 316 and the negative electrode terminal 317 of adjacent power storage cells 310 are electrically connected by a bus bar 420 so that the plurality of power storage cells 310 are connected in series. Examples of the material of the bus bar 420 include copper and aluminum.

  According to the electricity storage device 400, higher output can be achieved as compared with the electricity storage device 300. Thus, even the power storage device 400 that can achieve high output can be safely and electrically connected to the connected part by the switch part 320.

3. Third Embodiment Next, an electricity storage device according to a third embodiment will be described with reference to the drawings. 21 and 22 are plan views schematically showing the electricity storage device 500 according to the third embodiment. FIG. 23 is a perspective view schematically showing an electricity storage device 500 according to the third embodiment. Hereinafter, in the power storage device 500 according to the third embodiment, the members having the same functions as those of the power storage device 300 according to the second embodiment and the constituent members of the power storage device 400 according to the modification of the second embodiment. The same reference numerals are assigned and detailed description thereof is omitted.

  As shown in FIGS. 21 to 23, the power storage device 500 includes a power storage cell 310, a housing 510, an output terminal unit 520 including a positive output terminal 516, a negative output terminal 517, a switch unit 530, and a terminal connection. Member 550.

  For convenience, the housing 510 is not shown in FIGS. 22 and 23. In FIG. 23, the negative output terminal 517 is not shown. 21 and FIG. 22, in (a) in the drawing, the first state in which the positive electrode output terminal 516 and the positive electrode terminal 316 of the storage cell 310 are electrically separated (the switch unit 530 is in the OFF state, that is, 2 shows a second state in which the positive electrode output terminal 516 and the positive electrode terminal 316 are electrically connected (the switch unit 530 is ON). State, that is, a state in which the plug portion 580 is inserted). FIG. 23 shows a first state in which the plug portion 580 is removed.

  The housing 510 can accommodate the storage cell 310. The shape of the housing 510 is not particularly limited as long as the storage cell 310 can be accommodated. As a material of the housing 510, a resin that can be electrically insulated can be used.

  As shown in FIG. 23, a plurality of storage cells 310 are provided, and the plurality of storage cells 310 are connected in series. In the illustrated example, the plurality of power storage cells 310 are stacked along the X axis. Note that the number of power storage cells 310 is not particularly limited.

  The positive electrode output terminal 516 is provided exposed from the housing 510 as shown in FIG. The positive electrode output terminal 516 can be electrically connected to the positive electrode terminal 316 of the storage cell 310 via the switch unit 530. More specifically, the output terminal portion 520 including the positive electrode output terminal 516 includes the positive electrode terminal 316 of the storage cell 310 provided on the most + X-axis side among the stacked storage cells 310, the switch unit 530, and the terminal connection member. 550 can be connected. Examples of the material of the positive electrode output terminal 516 include aluminum and copper.

  The negative output terminal 517 is provided so as to be exposed from the housing 510 as shown in FIG. The negative output terminal 517 is electrically connected to the negative terminal 317 of the storage cell 310. More specifically, the negative electrode output terminal 517 is electrically connected to the negative electrode terminal 317 of the power storage cell 310 provided on the most −X axis side among the stacked power storage cells 310. As shown in FIG. 21, the negative electrode output terminal 517 may be exposed from the same surface of the housing 510 as the surface from which the positive electrode output terminal 516 is exposed. In this case, the negative electrode output terminal 517 may be connected to the negative electrode terminal 317 of the power storage cell 310 provided on the most −X axis side among the stacked power storage cells 310 via a wiring (not shown). Examples of the material of the negative electrode output terminal 517 include copper and nickel.

  Here, the connected portion 5000 illustrated in FIG. 23 is an object to which the voltage of the power storage device 500 is applied, and the form thereof is not particularly limited. More specifically, the power storage device 500 is connected by connecting one terminal of the connected portion 5000 to the positive output terminal 516 and connecting the other terminal of the connected portion 5000 to the negative output terminal 517 (not shown). Can be applied to the connected portion 5000. For example, the power storage device 500 may be charged by electrically connecting the power storage device 500 and the connected portion 5000. For convenience, the connected portion 5000 is not shown in FIGS. 21 and 22.

  Switch unit 530 is electrically connected to one electrode terminal of positive electrode terminal 316 and negative electrode terminal 317 of power storage cell 310. In the illustrated example, the switch unit 530 is electrically connected to the positive terminal 316, but may be electrically connected to the negative terminal 317. In this case, since the potential of the negative electrode terminal 317 is lower than that of the positive electrode terminal 316, the electrical connection between the power storage device 500 and the connected portion 5000 can be performed more safely. Two switch units 530 may be provided and electrically connected to both the positive terminal 316 and the negative terminal 317.

  Hereinafter, the configuration and the like of the switch unit 530 will be described with reference to the drawings. FIG. 24 is a plan view schematically showing the electricity storage device 500 according to the third embodiment, and is an enlarged view of a region A surrounded by a broken line shown in FIG. FIG. 25 is a cross-sectional view taken along the line CC of FIG. 22 schematically showing the electricity storage device 500 according to the third embodiment. For convenience, illustration of the storage cell 310 is omitted in FIGS. 24 and 25. Further, FIG. 25 shows a first state in which the plug portion 580 is removed in (a) in the drawing, and shows a second state in which the plug portion 580 is inserted in (b) in the drawing.

  Hereinafter, an example in which the switch unit 530 electrically separates and connects the positive terminal 316 and the output terminal unit 520 including the positive output terminal 516 will be described. More specifically, the switch unit 530 can electrically separate and connect the output terminal unit 520 and the terminal connection unit 550 connected to the positive terminal 316.

  As shown in FIG. 23, the output terminal portion 520 can include a positive electrode output terminal 516, a first support portion 522, and a connecting portion 524 that connects the positive electrode output terminal 516 and the first support portion 522. . The connecting portion 524 has a shape extending along the outer can 313 of the electricity storage cell 10 (along the Y axis). The positive electrode output terminal 516 extends in the + X-axis direction from the connection portion 524 and can be connected to the non-connection portion 5000 as described above. The first support part 522 extends from the connecting part 524 in the + X-axis direction and may have a plate shape. The first support part 522 can support the first elastic member 560 of the switch part 530.

  The positive electrode output terminal 516, the first support portion 522, and the connecting portion 524 are integrally formed as the output terminal portion 520. Examples of the material of the output terminal portion 520 include aluminum, copper, and stainless steel.

  As shown in FIG. 23, the terminal connection member 550 can include a second support portion 552 and a connection portion 554. The connection part 554 is connected to the positive terminal 316. Connection portion 554 may be connected to positive electrode terminal 316 by welding. The second support part 552 extends in the + X-axis direction from the connection part 554 and may have a plate shape. As shown in FIG. 25, the first support part 522 and the second support part 554 are arranged to face each other.

  The second support part 552 and the connection part 554 are integrally formed as a terminal connection member 550. Examples of the material of the terminal connection member 550 include aluminum, copper, and stainless steel. The second support part 552 can support the second elastic member 570 of the switch part 530.

  As shown in FIGS. 24 and 25, the switch unit 530 can include a first elastic member 560, a second elastic member 570, and a plug unit 580.

  The first elastic member 560 is connected to the output terminal portion 520. More specifically, the first elastic member 560 is supported by the first support portion 522 of the output terminal portion 520. Here, FIG. 26 is a perspective view schematically showing the first elastic member 560. FIG. 26 shows the first elastic member 560 viewed from different angles in (a) and (b) in the figure. The first elastic member 560 can include a first elastic portion 562, a third elastic portion 564, and a fixing portion 566, as shown in FIGS.

  As shown in FIG. 25, the first elastic portion 562 is supported on the second support portion 552 side (+ Z axis side) of the first support portion 522. The third elastic portion 564 is supported on the opposite side (-Z axis side) of the first support portion 522 from the first elastic portion 562.

  The first elastic portion 562 and the third elastic portion 564 have a shape in which one end portion is a fixed end fixed to the fixed portion 566 and the other end portion is a free end. As shown in FIG. 25A, the first elastic portion 562 has a shape curved toward the + Z-axis side in the first state where the plug 580 is removed. The third elastic portion 564 has a shape curved in the −Z-axis side in the first state. The length from the fixed end to the free end of the first elastic part 562 is larger than the length from the fixed end to the free end of the third elastic part 564, for example. The numbers of the first elastic portions 562 and the third elastic portions 564 are not particularly limited, but in the example shown in FIGS. 24 and 26, four first elastic portions 562 are provided, and the third elastic portion 564 is 7 One is provided.

  The fixing portion 566 is fixed to the first support portion 522 as shown in FIG. The fixing portion 566 may be fixed to the first support portion 522 by welding.

  The second elastic member 570 is connected to the terminal connection member 550. More specifically, the second elastic member 570 is supported by the second support portion 552 of the terminal connection member 550. The second elastic member 570 may include a second elastic portion 572, a fourth elastic portion 574, and a fixing portion 576.

  The second elastic portion 572 is supported on the first support portion 522 side (−Z axis side) of the second support portion 552 as shown in FIG. 25. The fourth elastic portion 574 is supported on the opposite side (+ Z axis side) of the first support portion 522 from the second elastic portion 572.

  The second elastic portion 572 and the fourth elastic portion 574 have a shape in which one end portion is a fixed end fixed to the fixing portion 576 and the other end portion is a free end. As shown in FIG. 25A, the second elastic portion 572 has a shape curved toward the −Z-axis side in the first state where the plug 580 is removed. The fourth elastic portion 574 has a shape curved in the + Z-axis side in the first state. The length from the fixed end to the free end of the second elastic portion 572 is larger than the length from the fixed end to the free end of the fourth elastic portion 574, for example. The number of the second elastic portions 572 and the fourth elastic portions 574 is not particularly limited. In the illustrated example, four second elastic portions 572 are provided, and seven fourth elastic portions 574 are provided. .

  The second elastic portion 572 is provided to be separated from the first elastic portion 562. As shown in FIG. 25A, the second elastic portion 572 can have a portion located on the + Z-axis side with respect to the first elastic portion 562 in the first state where the plug 580 is removed. As shown in FIG. 24, the first elastic portions 562 and the second elastic portions 572 are alternately arranged along the Y axis.

  The fixing portion 576 is fixed to the second support portion 552 as shown in FIG. The fixing portion 576 may be fixed to the second support portion 552 by welding.

  The second elastic member 570 may have the same shape as the first elastic member 560. More specifically, the shape of the second elastic member 570 is a shape obtained by rotating the first elastic member 560 180 degrees around the X axis.

  The elastic portions 562 and 564 and the fixing portion 566 are integrally formed as the first elastic member 560 and can be electrically connected to the output terminal portion 20. The elastic portions 572 and 574 and the fixing portion 576 are integrally formed as the second elastic member 570 and are electrically connected to the terminal connection member 550.

  Examples of the material of the first elastic member 560 and the second elastic member 570 include aluminum, copper, and stainless steel. The material of the first elastic member 560 may be the same as or different from the material of the output terminal portion 520, but is preferably the same from the viewpoint of reducing the contact resistance. Similarly, the material of the second elastic member 570 may be the same as or different from the material of the terminal connection member 550, but is preferably the same from the viewpoint of reducing the contact resistance. Further, as means for further reducing the contact resistance, it is preferable to use aluminum or copper plated with gold or tin as the elastic members 560 and 570.

  As shown in FIG. 21A, the first elastic member 560 and the second elastic member 570 are exposed from the housing 510 in the first state where the plug portion 580 is removed.

  The plug portion 580 has a shape that can be inserted and removed between the first elastic portion 562 and the second elastic portion 572. Here, FIG. 27 is a perspective view schematically showing the plug portion 580. FIG. 27 shows the plug portion 580 viewed from different angles in FIGS.

  As shown in FIGS. 25 and 27, the plug portion 580 can include a conductive member 582 and an insulating member 589. The conductive member 582 can include a first conductive portion 584, a second conductive portion 586, and a third conductive portion 588.

  The first conductive portion 584 has, for example, a plate shape. The first conductive portion 584 can be taken in and out between the first elastic portion 562 and the second elastic portion 572. As shown in FIG. 25B, the first elastic portion 562 is in the second state in which the first conductive portion 584 (the plug portion 580) is inserted between the first elastic portion 562 and the second elastic portion 572. And the second elastic portion 572 are electrically connected. That is, the first elastic part 562 and the second elastic part 572 are connected via the first conductive part 584. In the second state, the first elastic portion 562 is located on the −Z axis side of the first conductive portion 584, and the second elastic portion 572 is located on the + Z axis side of the first conductive portion 584. The first conductive member 584 is in contact with the first elastic portion 562 and the second elastic portion 572 in the second state. In the second state, the first conductive portion 584 is biased in the + Z-axis direction by the first elastic portion 562 and biased in the −Z-axis direction by the second elastic portion 572.

  The second conductive part 586 is electrically connected to the first conductive part 584. The second conductive portion 586 has, for example, a plate shape. In the example shown in FIG. 25B, the second conductive portion 586 is located on the −Z axis direction side of the first conductive portion 584 in the second state. More specifically, the second conductive portion 586 is located on the −Z axis direction side of the third elastic portion 564. The second conductive portion 586 is in contact with the third elastic portion 564 in the second state. The second conductive portion 586 is biased in the −Z-axis direction by the third elastic portion 564 in the second state.

  The third conductive part 588 is electrically connected to the first conductive part 584. The third conductive portion 588 has, for example, a plate shape. In the example shown in FIG. 25B, the third conductive portion 588 is located on the + Z-axis side of the first conductive portion 584 in the second state. More specifically, the third conductive portion 588 is located on the + Z axis side of the fourth elastic portion 574 in the second state. The third conductive portion 588 is in contact with the fourth elastic portion 574 in the second state. The third conductive portion 588 is biased in the + Z-axis direction by the fourth elastic portion 574 in the second state.

  The conductive portions 584, 586, 588 are integrally formed as a conductive member 582. Examples of the material of the conductive member 582 include aluminum, copper, and stainless steel.

  The insulating member 589 supports the conductive member 582. The shape of the insulating member 589 is not particularly limited as long as the conductive member 582 can be supported. As a material of the insulating portion 589, for example, a resin can be used.

  Next, a connection method for electrically connecting power storage device 500 to connected portion 5000 will be described.

  First, as shown in FIG. 23, the output terminal portion 520 and the connected portion 5000 are electrically connected in a state where the positive terminal 316 and the output terminal portion 520 are electrically separated (first state) ( First step). Although not shown, the negative output terminal 517 and the connected portion 5000 are electrically connected.

  Next, as shown in FIG. 25B, the positive electrode terminal 316 and the output terminal portion 520 are electrically connected (second step). Electrical connection between the positive terminal 316 and the output terminal portion 520 is performed by the switch portion 530. More specifically, the first conductive portion 584 is inserted between the first elastic portion 562 and the second elastic portion 572, and the first conductive portion 584 and the elastic portions 562, 572 are brought into contact with each other. At the same time, the second conductive portion 586 and the third elastic portion 564 are brought into contact with each other, and the third conductive portion 588 and the fourth conductive portion 574 are brought into contact with each other. Thereby, the positive electrode terminal 316 and the output terminal part 520 can be electrically connected, and as a result, the electrical storage device 500 and the to-be-connected part 5000 can be electrically connected.

  The power storage device 500 according to the third embodiment has, for example, the following characteristics.

  The power storage device 500 includes the switch unit 530 that can electrically separate and connect one electrode terminal of the positive electrode terminal 316 and the negative electrode terminal 317 and the output terminal unit 520. Thereby, first, for example, the output terminal portion 520 and the connected portion 5000 can be electrically connected in a state where the positive electrode terminal 316 and the output terminal portion 520 are electrically separated. Thereafter, the positive electrode terminal 316 and the output terminal portion 520 can be electrically connected. Therefore, in the electricity storage device 500, the output terminal portion and the terminal of the connected portion are connected, and at the same time, no voltage is applied to the connected portion, and high safety can be achieved. That is, in the electricity storage device 500, for example, even when the operator touches the terminal when connecting the output terminal portion 520 and the terminal of the connected portion 5000, the output terminal portion 520 and the connected portion 5000 are connected. Since a voltage is not applied to the connected portion 5000 at the same time as connecting the terminal, high safety can be achieved.

  According to the electricity storage device 500, in the second state where the first conductive portion 584 is inserted between the first elastic portion 562 and the second elastic portion 572, the first elastic portion 562 and the second elastic portion 572 are: Electrically connected. Therefore, it can suppress that the contact resistance of the 1st conductive member 584 and the elastic parts 562 and 564 changes. Furthermore, for example, a reliable electrical connection between the first conductive portion 584 and the elastic portions 562 and 572 can be ensured.

  According to the electricity storage device 500, in the second state, the second conductive portion 586 is in contact with the third elastic portion 564, and the third conductive portion 588 is in contact with the fourth elastic portion 574. Therefore, in the electricity storage device 500, the contact area between the conductive member 582 of the plug portion 580 and the elastic members 560 and 570 can be increased. Thereby, for example, the earthquake resistance of the electricity storage device 500 in the second state can be improved, and the reliability can be improved. Furthermore, the contact resistance between the conductive portion 582 and the elastic structures 560 and 570 can be reduced.

  According to the electricity storage device 500, for example, when a plurality of electricity storage devices 500 are connected in series, the positive electrode output terminal 516 of one adjacent electricity storage device 500 and the negative electrode output terminal 517 of the other electricity storage device 500 are connected. In this state, the storage cell 310 of one storage device 500 and the storage cell 310 of the other storage device 500 can be electrically separated by the switch unit 530. Therefore, when connecting the some electrical storage device 500 in series, it can suppress that an operator short-circuits the several electrical storage device 500 accidentally. Therefore, it is possible to suppress deterioration of the storage cell 310.

  The present invention is not limited to the above-described embodiments, and various modifications can be made. The present invention can be appropriately combined with the above-described embodiments and modifications. For example, the switch unit 40 of the electricity storage device 100 according to the first embodiment may be connected to the electricity storage cell 310 of the electricity storage device 300 according to the second embodiment, and conversely, the electricity storage device 300 according to the second embodiment. The switch unit 330 may be connected to the power storage cell 10 of the power storage device 100 according to the first embodiment. Further, the switch unit 40 of the electricity storage device 100 according to the first embodiment may be connected to the electricity storage cell 310 of the electricity storage device 500 according to the third embodiment, and conversely, the electricity storage device 500 according to the third embodiment. The switch unit 530 may be connected to the power storage cell 10 of the power storage device 100 according to the first embodiment.

  Further, the present invention includes, for example, a configuration substantially the same as the configuration described in the embodiment (for example, a configuration having the same function, method, and result, or a configuration having the same purpose and effect). In addition, the invention includes a configuration in which a non-essential part of the configuration described in the embodiment is replaced. In addition, the present invention includes a configuration that achieves the same effect as the configuration described in the embodiment or a configuration that can achieve the same object. In addition, the invention includes a configuration in which a known technique is added to the configuration described in the embodiment.

DESCRIPTION OF SYMBOLS 1 ... Positive electrode, 1a ... Positive electrode collector, 1b ... Positive electrode active material layer, 2 ... Negative electrode, 2a ... Negative electrode collector, 2b ... Negative electrode active material layer, 3 ... Lithium electrode, 3a ... Lithium electrode current collector, 3b DESCRIPTION OF SYMBOLS ... Lithium foil, 4 ... Separator, 5 ... Electrode laminated body, 6 ... Positive electrode lead, 7 ... Negative electrode lead, 10 ... Storage cell, 12 ... Exterior body, 12a ... 1st laminated film, 12b ... 2nd laminated film, 14 ... Positive terminal 16, negative terminal 17, sandwiched portion 20, base body, 22 opening portion, 24 projecting portion, 26 opening portion, 29 lid body, 30 output terminal portion, 31 first portion, 32 ... 2nd part, 33 ... 3rd part, 34 ... Opening part, 35 ... Opening part, 36 ... Opening part, 40 ... Switch part, 50 ... Conductive member, 51 ... Electrode terminal contact part, 52 ... Curved part, 53 ... Extension part, 54 ... Output terminal contact part, 55 ... Slit part, 56 ... Mouth, 60 ... Screw holder, 62 ... Opening, 70 ... Screw, 72 ... Screw, 74 ... Tip, 76 ... Nut, 80 ... Insulating member, 81 ... Tubular, 82 ... Knob, 83 DESCRIPTION OF SYMBOLS ... Insert part, 83a ... Side, 100 ... Device, 200 ... Device, 300 ... Power storage device, 310 ... Power storage cell, 312 ... Exterior body, 313 ... Exterior can, 314 ... Sealing plate, 315 ... Safety valve, 316 ... Positive electrode terminal, 317 ... Negative electrode terminal, 320 ... Output terminal part, 321 ... First part, 322 ... Second part, 323 ... Third part, 324 ... Opening part, 325 ... Opening part, 330 ... Switch part, 340 ... Conductive member, 341 ... electrode connection part, 342 ... support part, 343 ... extension part, 344 ... output terminal contact part, 345 ... opening part, 346 ... wiring part, 350 ... base part, 351 ... housing part, 352 ... opening part, 353 ... opening Part, 354 ... Placement part, 355 ... First uneven part, 355a ... Concave part, 355b ... Convex part, 360 ... Insulating member, 361 ... Opening part, 362 ... Second uneven part, 362a ... Concave part, 362b ... Convex part, 363 ... Step Part, 370 ... knob part, 371 ... opening, 380 ... screw part, 382 ... tip part, 384 ... nut, 400 ... electricity storage device, 410 ... separator, 420 ... bus bar, 500 ... electricity storage device, 510 ... housing, 520 ... output terminal part, 522 ... first support part, 524 ... connecting part, 530 ... switch part, 550 ... terminal connection member, 552 ... second support part, 554 ... connection part, 560 ... first elastic member, 562 ... first DESCRIPTION OF SYMBOLS 1 elastic part, 564 ... 3rd elastic part, 570 ... 2nd elastic member, 572 ... 2nd elastic part, 574 ... 4th elastic part, 580 ... Plug part, 582 ... Conductive member, 584 ... 1st conductive part, 586 ... second Electrostatic unit, 588 ... third conductive portion, 589: insulating member, 1000 ... connected part, 3000 ... connected part, 5000 ... connected part

Claims (4)

A storage cell having a positive terminal and a negative terminal;
One electrode terminal of the positive electrode terminal and the negative electrode terminal, and an output terminal part, a switch part that can be electrically separated and connected,
A conductive terminal connection member connected to the electrode terminal;
Including
The switch part is
A first elastic portion having conductivity, electrically connected to the output terminal portion;
A conductive second elastic portion electrically connected to the electrode terminal and spaced apart from the first elastic portion;
A first conductive portion disposed between the first elastic portion and the second elastic portion so as to be able to be put in and out ;
In a state where the first conductive part is inserted between the first elastic part and the second elastic part, the first elastic part and the second elastic part are electrically connected,
The first elastic part is supported by a first support part of the output terminal part,
The second elastic part is supported by a second support part of the terminal connection member,
The first support part and the second support part are arranged to face each other,
The switch part is
A third elastic part having electrical conductivity supported on the opposite side of the first support part from the first elastic part;
A conductive fourth elastic portion supported on the opposite side of the second support portion from the second elastic portion;
A second conductive portion and a third conductive portion electrically connected to the first conductive portion;
And further comprising,
The second conductive portion before SL, in the inserted state, in contact with the third elastic portion,
The power storage device, wherein the third conductive portion is in contact with the fourth elastic portion in the inserted state. In claim 1,
The switch unit is an electricity storage device that is electrically connected to the negative terminal. In claim 1 or 2,
A plurality of the storage cells are provided,
The power storage device, wherein the plurality of power storage cells are connected in series. In any one of Claims 1 thru | or 3,
The electricity storage device, wherein the electricity storage cell is a lithium ion capacitor.

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