JP3192022U - Storage device and switch for storage device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power storage device having high safety and a switch for a power storage device. A power storage device includes a power storage cell having a positive electrode terminal and a negative electrode terminal, a first conductive portion having a first surface and being electrically connected to one of the positive electrode terminals and the negative electrode terminals, and an electrode terminal. A switch unit 30 that can electrically separate and connect the output terminal unit having the first surface and the output terminal unit having the first surface is provided. The switch portion 30 has a plate-shaped portion 325 having a first surface 321 and a second surface, and the plate-shaped portion 325 is arranged between the first conductive portion and the output terminal portion so as to be put in and out of the second conductive portion. It has a portion 320 and an insulating portion 330 that is arranged so as to be able to be taken in and out between the first conductive portion and the output terminal portion, and the first surface 321 of the second conductive portion 320 is the first surface of the first conductive portion. In the first state where the second surface of the second conductive portion 320 is in contact with the 321 and the second surface of the second conductive portion 320 is in contact with the first surface of the output terminal portion, the electrode terminal and the output terminal portion are electrically connected, and the insulating portion 330 is output from the first conductive portion. In the second state inserted between the terminal portion, the electrode terminal and the output terminal portion are electrically separated. [Selection diagram] Fig. 4

Description

  The present invention relates to a power storage device and a switch for a power 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 storage cell such as a lithium ion capacitor, a lithium ion battery, a lithium ion secondary battery, or an electric double layer capacitor 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.

  Patent Document 4 discloses a power supply apparatus including a safety plug for safely handling an electricity storage device using such an electricity storage cell.

JP 2006-236605 A JP 2008-166191 A JP 2005-116444 A JP 2006-294425 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. In addition, it is not preferable that the output voltage of the electricity storage device is applied to an external object due to an impact caused by an unexpected accident during transportation.

  An object of some aspects of the present invention is to provide a power storage device and a switch for a power storage device 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]
The electricity storage device according to this application example is
A storage cell having a positive terminal and a negative terminal;
A first conductive portion having a first surface and electrically connected to one of the positive electrode terminal and the negative electrode terminal;
A switch part capable of electrically separating and connecting the electrode terminal and the output terminal part having the first surface;
With
The switch part is
A second conductive portion having a plate-like portion having a first surface and a second surface, wherein the plate-like portion is detachably disposed between the first conductive portion and the output terminal portion;
An insulating portion 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, the first surface of the second conductive portion is in contact with the first surface of the first conductive portion, and the second surface of the second conductive portion is in contact with the first surface of the output terminal portion. The electrode terminal and the output terminal portion are electrically connected,
In the second state in which the insulating portion is inserted between the first conductive portion and the output terminal portion, the electrode terminal and the output terminal portion are electrically separated from each other.

[Application Example 2]
In the above application example,
The switch part is
The first state may further include a pressing portion that presses the first conductive portion, the second conductive portion, and the output terminal portion so as to contact each other.

[Application Example 3]
In the above application example,
The pressing portion is
A screw portion having a shaft portion and an insulating head portion;
The shaft portion is screwed with the first conductive portion,
The head may press the output terminal portion.

[Application Example 4]
In the above application example,
The output terminal portion may not be in contact with the shaft portion.

[Application Example 5]
In the above application example,
The plate-like portion of the second conductive portion is
As viewed from the direction perpendicular to the first surface of the second conductive portion, in the first state, the plate-like portion has a recess so as to surround a part of the periphery of the shaft portion of the screw portion. May be.

[Application Example 6]
In the above application example,
The first surface of the first conductive portion and the first surface of the output terminal portion are arranged to face each other with a gap,
The first state and the second state may be switched by inserting the plate-like portion or the insulating portion of the second conductive portion into the gap.

[Application Example 7]
In the above application example,
The plate-like part of the second conductive part and the end part of the insulating part inserted into the gap may be tapered.

[Application Example 8]
In the above application example,
The switch part is
You may further have a support part which supports the said 2nd electroconductive part and the said insulating part.

[Application Example 9]
In the above application example,
You may have further the latching | locking part which latches the said support part in the said 1st state or the said 2nd state.

[Application Example 10]
In the above application example,
The electrode terminal may be the positive electrode terminal of the storage cell.

[Application Example 11]
In the above application example,
A plurality of the storage cells are provided,
The plurality of power storage cells may be connected in series.

[Application Example 12]
In the above application example,
The storage cell may be a lithium ion capacitor.

[Application Example 13]
The storage device switch according to this application example is
A first conductive portion having a first surface and electrically connected to one electrode terminal of the positive electrode terminal and the negative electrode terminal of the storage cell;
An output terminal portion having a first surface;
It has a switch part that can be electrically separated and connected,
The switch part is
A second conductive portion having a plate-like portion having a first surface and a second surface, wherein the plate-like portion is detachably disposed between the first conductive portion and the output terminal portion;
An insulating portion disposed so as to be able to be inserted and removed between the first conductive portion and the output terminal portion;
Have
In the first state, the first surface of the second conductive portion is in contact with the first surface of the first conductive portion, and the second surface of the second conductive portion is in contact with the first surface of the output terminal portion. The electrode terminal and the output terminal portion are electrically connected,
In the second state in which the insulating portion is inserted between the first conductive portion and the output terminal portion, the electrode terminal and the output terminal portion are electrically separated from each other.

In a storage cell such as a lithium ion capacitor, a lithium ion battery, a lithium ion secondary battery, or an electric double layer capacitor, a voltage is output between the positive electrode terminal and the negative electrode terminal even in a non-charged state. Therefore, for example, when an operator touches the output terminal part when connecting the output terminal part of the power storage device not having the switch part and the connected part, the output terminal part of the power storage device and the connected part are connected. If a voltage is applied to the connected part at the same time as connecting the parts, the risk of electric shock from the operator increases, and safety is reduced.

  According to the electricity storage device of the present invention, the switch unit is capable of electrically separating and connecting one electrode terminal 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, since the voltage is not applied to the connected part at the same time as connecting the output terminal part and the terminal of the connected part, it can have high safety. For example, when connecting the output terminal portion of the electricity storage device and the terminal of the connected portion, the operator may touch the output terminal portion, and when the output terminal portion of the electricity storage device and the connected portion are connected. At the same time, if a voltage is applied to the connected part, the safety is lowered.

  According to the electricity storage device of the present invention, the first surface of the second conductive portion is in contact with the first surface of the first conductive portion, and the second surface of the second conductive portion is in contact with the first surface of the output terminal portion. Since the electrode terminal and the output terminal portion are electrically connected in the first state, the resistance value of the switch portion can be made smaller than that of the point contact switch.

  Moreover, according to the electricity storage device according to the present invention, the electrode terminal and the output terminal portion are electrically separated in the second state in which the insulating portion is inserted between the first conductive portion and the output terminal portion. Compared to a configuration that electrically separates only by air, it is more resistant to shocks in case of accidents during transportation.

It is a perspective view which shows typically the external appearance of the electrical storage device 1 which concerns on this embodiment. It is a disassembled perspective view for demonstrating the electrical connection of the electrical storage device 1 which concerns on this embodiment. It is a perspective view which shows the external appearance of the electrical storage cell 10a. It is a perspective view which shows the external appearance of the switch 2 for electrical storage devices which concerns on this embodiment. FIG. 3 is a partial perspective view for explaining a state in which the electricity storage device switch 2 according to the present embodiment is attached to the electricity storage device 1. It is a front view of the electrical storage device 1 in a 1st state. It is sectional drawing in the AA of FIG. It is a front view of the electrical storage device 1 in a 2nd state. It is sectional drawing in the BB line of FIG.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. The drawings used are for convenience of explanation. The embodiments described below do not unduly limit the contents of the present invention described in the claims for utility model registration. Moreover, not all of the configurations described below are indispensable constituent requirements of the present invention. The coordinate system shown in the figure is an orthogonal coordinate system composed of an X axis, a Y axis, and a Z axis.

1. FIG. 1 is a perspective view schematically showing the external appearance of an electricity storage device 1 according to the present embodiment. FIG. 2 is an exploded perspective view for explaining the electrical connection of the electricity storage device 1 according to the present embodiment. FIG. 3 is a perspective view showing the appearance of the storage cell 10a.

  The power storage device 1 according to the present embodiment includes a power storage cell (for example, a power storage cell 10a, a power storage cell 10b, a power storage cell 10c, and a power storage cell 10d), a first conductive unit 20, and a switch unit 30 (for details, refer to “2. It will be described later in the section “Configuration of Device Switch Unit and Storage Device Switch”).

  In the example shown in FIG. 1, the power storage device 1 includes a front case 1001, a cell fixing case 1002, a cell fixing case 1003, a cell fixing case 1004, a back case 1005, and an upper surface case 1006. The storage cell is accommodated.

  The electricity storage device 1 may have a plurality of electricity storage cells. In the example shown in FIG. 2, 32 power storage cells are accommodated side by side in the Y-axis direction.

  The energy storage cell may be an electrochemical energy storage cell that utilizes an electrochemical phenomenon in at least one of the electrodes. Examples of the storage cell include a lithium ion capacitor, a lithium ion battery, a lithium ion secondary battery, and an electric double layer capacitor. In this embodiment, a lithium ion capacitor is used as the storage cell.

  In addition, in this embodiment, since the structure of the electrical storage cell 10a, the electrical storage cell 10b, the electrical storage cell 10c, and the electrical storage cell 10d is the same, it explains in full detail about the electrical storage cell 10a below, and respond | corresponds about another electrical storage cell. The structure is described in parentheses as appropriate.

  As shown in FIG. 3, the storage cell 10a (storage cell 10b, storage cell 10c, and storage cell 10d) includes a positive terminal 11a (positive terminal 11b, positive terminal 11c, and positive terminal 11d) and a negative terminal 12a (negative terminal 12b). , Negative electrode terminal 12c and negative electrode terminal 12d). Examples of the material of the positive electrode terminal 11a include aluminum, tin, gold, and stainless steel. Examples of the material of the negative electrode terminal 12a include copper and nickel.

  The exterior body 112 contains a positive electrode, a negative electrode, and an electrolytic solution. When the storage cell 10a is a lithium ion capacitor, the exterior body 112 further accommodates a lithium electrode. Furthermore, the exterior body 112 may accommodate a separator. The positive electrode, the negative electrode, the lithium electrode, and the separator can have a sheet shape. The storage cell 10a may constitute 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. A configuration example of the storage cell 10a will be described later in the section “3. Configuration Example of Storage Cell”.

  The shape of the exterior body 112 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 112 includes an exterior can 113 and a sealing plate 114.

  The outer can 113 has a thickness (for example, a length along the Y axis) smaller than a horizontal width (for example, a length along the X 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 113 include aluminum, stainless steel, and iron. Although not shown, the outer can 113 may be cylindrical.

  The sealing plate 114 can seal the opening of the outer can 113. Thereby, a positive electrode, a negative electrode, electrolyte solution, etc. can be sealed in the exterior body 112. FIG. The shape of the sealing plate 114 is not particularly limited as long as the opening of the outer can 113 can be sealed. Examples of the material of the sealing plate 114 include aluminum, stainless steel, and iron.

The positive electrode terminal 11 a is provided on the sealing plate 114. The shape of the positive electrode terminal 11a is not particularly limited, but is a bolt shape in the illustrated example. An example of the material of the positive electrode terminal 11a is aluminum. The positive electrode terminal 11 a is electrically connected to the positive electrode in the outer package 112 and the outer can 113 and the sealing plate 114.

  The negative electrode terminal 12a is provided so as to be insulated from the sealing plate 114 via a gasket (not shown) made of an insert-molded insulating member. The shape of the negative electrode terminal 12a is not particularly limited, but is a bolt shape in the illustrated example. Examples of the material of the negative electrode terminal 12a include copper and nickel. The negative electrode terminal 12 a is electrically connected to the negative electrode in the exterior body 112.

  The plurality of power storage cells may be connected in series. In the example shown in FIG. 2, the positive electrode terminal 11a (not shown in FIG. 2) of the electricity storage cell 10a is electrically connected to the negative electrode terminal 12b of the electricity storage cell 10b by the bus bar 13a. Similarly, the positive terminal 11b of the electrical storage cell 10b is electrically connected to the negative terminal 12c of the electrical storage cell 10c by the bus bar 13b. Similarly, the electricity storage devices adjacent in the Y-axis direction are connected to each other in series by a connection plate. Examples of the material of each bus bar including the bus bars 13a to 13b include copper or copper plated with tin. Thus, the electrical storage device 1 which can output a high voltage is realizable by connecting a some electrical storage cell in series.

  The first conductive portion 20 has a first surface 21 and is electrically connected to one of the positive electrode terminal and the negative electrode terminal of the storage cell. The first surface 21 is, for example, a surface substantially parallel to the XY plane in FIG. In addition, the 1st surface 21 is not restricted to a perfect plane, For example, the surface which has an unevenness | corrugation and a groove | channel may be sufficient. In the example shown in FIG. 2, it is electrically connected to the positive electrode terminal 11d of the storage cell 10d through the connection plate 13d. Examples of the material of the first conductive portion 20 and the connection plate 13d include copper or copper plated with tin. In addition, the 1st electroconductive part 20 and the connection board 13d may be comprised integrally.

  The switch unit 30 electrically separates the electrode terminal electrically connected to the first conductive unit 20 and the output terminal unit 40 having the first surface 41 (not shown in FIG. 2). And is configured to be connectable. The first surface 41 is, for example, a surface parallel to the XY plane in FIG. In addition, the 1st surface 41 is not restricted to a perfect plane, For example, the surface which has an unevenness | corrugation and a groove | channel may be sufficient. In the example shown in FIG. 2, the switch unit 30 is configured to be electrically connected to the positive electrode terminal 11d of the storage cell 10d via the first conductive unit 20, but is electrically connected to the negative electrode terminal 12a of the storage cell 10a. The structure connected to may be sufficient. Two or more switch units 30 may be provided and electrically connected to the positive terminal 11d or the negative terminal 12a, respectively.

  FIG. 2 shows a second conductive portion 320 that is a part of the configuration of the switch portion 30. Further, FIG. 1 shows a slide knob 61 which is a part of the configuration of the switch unit 30.

  The electricity storage device 1 may have a second output terminal portion 42. The second output terminal portion 42 is electrically connected to the negative electrode terminal 12a of the storage cell 10a.

2. Configuration of Storage Device Switch Unit and Storage Device Switch FIG. 4 is a perspective view showing an appearance of the storage device switch 2 according to the present embodiment. FIG. 5 is a partial perspective view for explaining a state in which the electricity storage device switch 2 according to the present embodiment is attached to the electricity storage device 1.

The electricity storage device switch 2 according to this embodiment includes a switch unit 30. The switch unit 30 shown in FIG. 4 is a part of the configuration of the power storage device switch 2 and is also a part of the configuration of the power storage device 1.

  The switch part 30 shown in FIGS. 4 and 5 has a second conductive part 320 and an insulating part 330.

  The second conductive portion 320 has a plate-like portion 325 having a first surface 321 and a second surface 322. The first surface 321 and the second surface 322 are surfaces that are in a positional relationship between the front and back of the plate-like portion 325. The first surface 321 and the second surface 322 are surfaces parallel to the ± X axis direction in FIG. In addition, the 1st surface 321 and the 2nd surface 322 are not restricted to a perfect plane, For example, the surface which has an unevenness | corrugation and a groove | channel may be sufficient.

  The plate-like part 325 of the second conductive part 320 is disposed between the first conductive part 20 and the output terminal part 40 so that it can be put in and out. The plate-like portion 325 of the second conductive portion 320 is, for example, between the first conductive portion 20 and the output terminal portion 40 by translating linearly or curvedly in the ± X axis direction in FIG. 7 (described later). It is put in and out. In the present embodiment, the plate-like portion 325 of the second conductive portion 320 is linearly translated in the ± X axis directions so that the first surface of the first conductive portion 20 and the first surface of the output terminal portion 40 are aligned. It is put in and out in the gap formed oppositely. Examples of the material of the second conductive portion 320 include copper, copper plated with tin, gold, an alloy of gold and tin, an alloy of nickel and tin, and the like.

  The insulating part 330 is disposed between the first conductive part 20 and the output terminal part 40 so as to be able to be taken in and out. In the example shown in FIG. 4, the insulating portion 330 has a plate-like portion configured in a plate shape. The plate-like portion of the insulating portion 330 is taken in and out of the first conductive portion 20 and the output terminal portion 40 by, for example, moving linearly or curvedly in the ± X axis direction. In the present embodiment, the plate-like portion of the insulating portion 330 is linearly translated in the ± X axis direction so that the first surface of the first conductive portion 20 and the first surface of the output terminal portion 40 face each other. It is put in and out of the formed gap. Examples of the material of the insulating portion 330 include various known insulating resin materials such as polyester-based polyethylene terephthalate resin, polyethylene resin, and epoxy resin. Among these, polybutylene terephthalate is more preferable in terms of improving flame retardancy and slidability.

  The switch unit 30 includes a first electrode terminal (a positive electrode terminal 11d of the storage cell 10d in the present embodiment) and the output terminal unit 40 that are electrically connected via the first conductive unit 20 and the second conductive unit 320. And a second state in which the electrode terminal (in this embodiment, the positive electrode terminal 11d of the storage cell 10d) and the output terminal portion 40 are electrically separated.

  FIG. 6 is a front view of the electricity storage device 1 in the first state. 7 is a cross-sectional view taken along line AA in FIG.

  As shown in FIG. 7, when the switch unit 30 is in the first state, the first surface 321 of the second conductive unit 320 is in contact with the first surface 21 of the first conductive unit 20 and the second conductive unit 320. The second surface 322 is in contact with the first surface 41 of the output terminal portion 40. Thus, the first conductive unit 20, the second conductive unit 320, and the output terminal unit 40 are electrically connected.

  FIG. 8 is a front view of the electricity storage device 1 in the second state. 9 is a cross-sectional view taken along line BB in FIG.

  As shown in FIG. 9, when the switch unit 30 is in the second state, the insulating unit 330 is inserted between the first conductive unit 20 and the output terminal unit 40. As a result, the first conductive portion 20 and the output terminal portion 40 are electrically separated.

  In a storage cell such as a lithium ion capacitor, a lithium ion battery, a lithium ion secondary battery, or an electric double layer capacitor, a voltage is output between the positive electrode terminal and the negative electrode terminal even in a non-charged state. Therefore, for example, when an operator touches the output terminal unit when connecting the output terminal unit of the power storage device not having the switch unit 30 and the connected unit, the output terminal unit of the power storage device and the target unit are connected. If a voltage is applied to the connected part at the same time as the connecting part is connected, the risk of an electric shock from the operator increases, and safety is reduced.

  According to the electricity storage device 1 and the electricity storage device switch 2 according to the present embodiment, one electrode terminal of the positive electrode terminal and the negative electrode terminal (in this embodiment, the positive electrode terminal 11d of the electricity storage cell 10d), the output terminal portion 40, The switch unit 30 can be electrically separated and connected. Thereby, first, in a state where the electrode terminal (in this embodiment, the positive electrode terminal 11d of the storage cell 10d) and the output terminal unit 40 are electrically separated, the output terminal unit 40 and the connected unit outside the storage device 1 are connected. Can be electrically connected. Thereafter, the electrode terminal (in this embodiment, the positive electrode terminal 11d of the storage cell 10d) and the output terminal portion 40 can be electrically connected. Therefore, in the electricity storage device 1 and the electricity storage device switch 2 according to the present embodiment, the output terminal portion 40 and the terminal of the connected portion outside the electricity storage device 1 are connected, and at the same time, a voltage is applied to the connected portion. Therefore, it can have high safety.

  Further, according to the electricity storage device 1 and the electricity storage device switch 2 according to the present embodiment, the first surface 321 of the second conductive portion 320 is in contact with the first surface 21 of the first conductive portion 20, and the second conductive portion 320 In the first state where the second surface 322 contacts the first surface 41 of the output terminal portion 40, the electrode terminal (in this embodiment, the positive electrode terminal 11d of the storage cell 10d) and the output terminal portion 40 are electrically connected. Therefore, the resistance value of the switch unit 30 can be reduced as compared with the point contact switch.

  Further, according to the electricity storage device 1 and the electricity storage device switch 2 according to the present embodiment, in the second state in which the insulating portion 330 is inserted between the first conductive portion 20 and the output terminal portion 40, In the embodiment, since the positive electrode terminal 11d) of the storage cell 10d and the output terminal portion 40 are electrically separated, compared to a configuration in which the positive electrode terminal 11d) and the output terminal portion 40 are electrically separated only by air, there is an impact in an unexpected accident during transportation. strong.

  The electricity storage device 1 according to the present embodiment may further include a pressing unit 50 that presses the first conductive unit 20, the second conductive unit 320, and the output terminal unit 40 in contact with each other in the first state. FIG. 7 shows a state where the pressing part 50 is pressed, and FIG. 9 shows a state where the pressing part 50 does not press the part. By having the pressing part 50, the reliability of electrical connection can be improved.

  In the present embodiment, the pressing part 50 includes a screw part 51 having a shaft part 512 and an insulating head part 511. As a material of the shaft portion 512, various known materials such as a metal and a resin material can be used as long as a desired strength can be ensured. Examples of the material of the head 511 include various known insulating resin materials such as polyamide resin, polyethylene resin, and epoxy resin.

  The shaft portion 512 is screwed into the through hole of the nut structure provided in the first conductive portion 20 through the through hole of the output terminal portion 40, and the head portion 511 is formed on the first surface 41 of the output terminal portion 40. Press the back side. Accordingly, the output terminal portion 40 can be pressed by operating the screw portion 51. Further, since the head portion 511 of the screw portion 51 is made of an insulating material, even when the operator operates the screw portion 51 using a conductive (for example, metal) tool, The risk of electric shock can be reduced.

The pressing unit 50 is not limited to a screw structure, and various known pressing structures such as rivets and push rivets can be employed.

  In the present embodiment, the output terminal portion 40 is configured not to contact the shaft portion 512 of the screw portion 51. As shown in FIG. 7, the through hole of the output terminal portion 40 is configured to be larger than the shaft portion 512. Therefore, even if the shaft portion 512 is conductive (for example, made of metal), the first conductive portion 20 and the output terminal portion 40 are not electrically connected via the shaft portion 512.

  In the electricity storage device 1 according to this embodiment, the plate-like portion 325 of the second conductive portion 320 is in the first state when viewed from the direction (Y-axis direction) perpendicular to the first surface 321 of the second conductive portion 320. The plate-like portion 325 has a recess 3201 so as to surround a part of the periphery of the shaft portion 512 of the screw portion 51. In the example shown in FIG. 4, the recess 3201 is configured in an alphabetic U shape that is recessed in the negative direction of the X axis when viewed from the direction (Y axis direction) perpendicular to the first surface 321 of the second conductive part 320. ing. Since the shaft part 512 of the screw part 51 has a substantially cylindrical shape, the plate-like part 325 has the concave part 3201, and thereby the contact area between the second conductive part 320 and the first conductive part 20, and the second conductive part 320. And the contact area between the output terminal portion 40 can be increased. Thereby, the resistance value of the switch part 30 can be made small.

  In the example shown in FIG. 4, the insulating portion 330 is such that the plate-like portion of the insulating portion 330 surrounds a part of the periphery of the shaft portion 512 of the screw portion 51 in the second state when viewed from the Y-axis direction. In addition, a recess 3301 is provided. The recess 3301 is formed in an alphabetic U shape as viewed from the Y-axis direction. Since the shaft portion 512 of the screw portion 51 has a substantially cylindrical shape, the area where the insulating portion 330 and the first conductive portion 20 can come into contact with each other because the plate-like portion of the insulating portion 330 has the concave portion 3301, and the insulating portion The area in which 330 and the output terminal portion 40 can contact can be increased. Thereby, the strength of the switch unit 30 can be increased.

  In the electricity storage device 1 according to the present embodiment, the first surface 21 of the first conductive portion 20 and the first surface 41 of the output terminal portion 40 are arranged to face each other with a gap, and the plate of the second conductive portion 320 is disposed. The first state and the second state are switched by inserting the shape portion 325 or the insulating portion 330 into the gap. Thus, the first state and the second state can be switched with a simple operation.

  In the electricity storage device 1 according to the present embodiment, the end 3202 of the plate-like portion 325 of the second conductive portion 320 that is inserted into the gap has a tapered shape. Accordingly, the second conductive part 320 is easily inserted into the gap.

  Moreover, in the electrical storage device 1 according to the present embodiment, the end portion 3302 of the plate-like portion of the insulating portion 330 that is inserted into the gap has a tapered shape. Thereby, the insulating part 330 is easily inserted into the gap.

  In the electricity storage device 1 according to the present embodiment, the switch unit 30 may further include a support unit 60 that supports the second conductive unit 320 and the insulating unit 330. The support part 60 may be configured integrally with the insulating part 330. The support unit 60 can define the relative positional relationship between the second conductive unit 320 and the insulating unit 330. Therefore, the first state and the second state can be switched by one operation. In the example shown in FIG. 4, the support portion 60 has a slide knob 61. This facilitates the operation by the operator.

The electricity storage device 1 according to the present embodiment may further include a locking portion 70 that locks the support portion 60 in the first state or the second state of the switch unit 30. In the example shown in FIG. 5, the locking portion 70 is configured by two concave portions (groove and notch structure) provided in the cell fixing case 1002. Further, in the example shown in FIG. 4, a convex portion 62 is provided on the support portion 60 of the switch portion 30, and is locked to one of the two concave portions of the locking portion 70. Accordingly, the support unit 60 can be suppressed to some extent from moving in the X-axis direction, and the switch unit 30 can be suppressed from moving from the first state or the second state to another state or an intermediate state to some extent. This facilitates the operation by the operator.

  In the example shown in FIGS. 7 and 9, the head portion 511 of the screw portion 51 is generally formed in a step shape in which two cylinders are overlapped. The diameter of the cylinder closer to the shaft portion 512 is configured to be larger than the diameter of the cylinder on the far side. Moreover, the switch part 30 has the drop prevention plate 80 which is latched by the holding | maintenance part 60 and has a through-hole. The size of the through hole of the fall prevention plate 80 is configured to be larger than the diameter of the cylinder on the tip side of the head portion 511 of the screw portion 51 and smaller than the diameter of the cylinder on the shaft portion 512 side of the head portion 511. The drop prevention plate 80 can prevent the screw part 51 from easily falling off while ensuring the operability of the screw part 51.

3. Configuration Example of Power Storage Cell Next, the internal structure of the power storage cell 10a will be described. Below, the case where the electrical storage cell 10a is a lithium ion capacitor is demonstrated as an example.

  The electrical storage cell 10a can have the electrode laminated body and electrolyte solution which were accommodated in the exterior body. The electrode laminate and the electrolytic solution are accommodated in the exterior body.

  The electrode laminate is immersed in the electrolytic solution. The electrode laminate can have a positive electrode, a negative electrode, a lithium electrode, and a separator. The positive electrode, the negative electrode, the lithium electrode, and the separator can have a sheet-like shape, and the electrode laminate is laminated in the order of the lithium electrode, the negative electrode, the positive electrode, the negative electrode, the positive electrode, the negative electrode, and the lithium electrode. And a separator between the electrode and the exterior body.

  In addition, the number of positive electrodes and negative electrodes is not particularly limited. Similarly, the number and location of lithium electrodes are not particularly limited. 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.

  The positive electrode can include a positive electrode current collector and a positive electrode active material layer. As the positive electrode current collector, a porous metal foil can be used. Examples of the material of the positive electrode current collector include aluminum and stainless steel. The positive electrode current collector is connected to the positive electrode terminal 11a through a positive electrode lead. The material of the positive electrode lead is the same as the material of the positive electrode current collector, for example.

  The positive electrode active material layer is formed on the positive electrode current collector, and may be formed on both surfaces of the positive electrode current collector, or may be formed only on one surface.

  The positive electrode active material layer contains a positive electrode active material. Examples of the positive electrode active material include activated carbon and a polyacene material (PAS) that is a heat-treated product of an aromatic condensation polymer.

  The negative electrode can have a negative electrode current collector and a negative electrode active material layer. As the negative electrode current collector, a porous metal foil can be used. Examples of the material for the negative electrode current collector include copper, stainless steel, and nickel. The negative electrode current collector is connected to the negative electrode terminal 12a through a negative electrode lead. The material of the negative electrode lead is the same as the material of the negative electrode current collector, for example.

  The negative electrode active material layer is formed on the negative electrode current collector, and may be formed on both sides of the negative electrode current collector, or may be formed only on one side.

  The negative electrode active material layer 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.

  The lithium electrode includes a lithium electrode current collector and a lithium foil. As the lithium electrode current collector, a porous metal foil can be used. Examples of the material for the lithium electrode current collector include copper and stainless steel.

  The lithium foil is, for example, pressure bonded to one surface of the lithium electrode current collector. The material of the lithium foil is lithium. The lithium foil can function as a source of lithium ions. That is, by connecting the lithium electrode current collector and the negative electrode current collector through a negative electrode lead and short-circuiting the lithium foil, the lithium foil can be dissolved in the electrolyte and become lithium ions. Then, the lithium ions are electrochemically doped into the negative electrode active material layer (also referred to as “pre-dope”) via the electrolytic solution. As a result, the potential of the negative electrode can be lowered. Thereby, an energy density can be enlarged.

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.

  As the separator, a positive electrode active material, a negative electrode active material, and a porous material that is durable against an electrolyte can be used. As the separator, 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 separator can isolate between the positive electrode and the negative electrode or between the negative electrode and the lithium electrode. Furthermore, the separator can infiltrate the electrolyte.

  As mentioned above, although this embodiment or the modification was demonstrated, this invention is not restricted to these this embodiment or a modification, In the range which does not deviate from the summary, it is possible to implement in various aspects.

  The present invention includes configurations that are substantially the same as the configurations described in the embodiments (for example, configurations that have the same functions, methods, and results, or configurations that have the same objects and effects). In addition, the present 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 purpose. Further, the present invention includes a configuration in which a known technique is added to the configuration described in the embodiment.

DESCRIPTION OF SYMBOLS 1 ... Power storage device, 2 ... Switch for power storage device, 10a, 10b, 10c, 10d ... Power storage cell, 11a, 11b, 11c, 11d ... Positive terminal, 12a, 12b, 12c, 12d ... Negative terminal, 13a, 13b ... Bus bar , 13d ... connecting plate, 20 ... first conductive portion, 21 ... first surface, 30 ... switch portion, 40 ... output terminal portion, 41 ... first surface, 42 ... second output terminal portion, 50 ... pressing portion, 51 DESCRIPTION OF SYMBOLS ... Screw part, 60 ... Support part, 61 ... Slide knob, 62 ... Convex part, 70 ... Locking part, 80 ... Detachment prevention plate, 112 ... Exterior body, 113 ... Exterior can, 114 ... Sealing plate, 320 ... Second Conductive part, 321 ... 1st surface, 322 ... 2nd surface, 325 ... plate-like part, 330 ... insulating part, 511
... head, 512 ... shaft, 1001 ... front case, 1002 to 1004 ... cell fixing case, 1005 ... back case, 1006 ... top case, 2201 ... concave, 2301 ... concave, 2202 ... end, 2302 ... end

Claims (13)

A storage cell having a positive terminal and a negative terminal;
A first conductive portion having a first surface and electrically connected to one of the positive electrode terminal and the negative electrode terminal;
A switch part capable of electrically separating and connecting the electrode terminal and the output terminal part having the first surface;
With
The switch part is
A second conductive portion having a plate-like portion having a first surface and a second surface, wherein the plate-like portion is detachably disposed between the first conductive portion and the output terminal portion;
An insulating portion disposed so as to be able to be inserted and removed between the first conductive portion and the output terminal portion;
Have
In the first state, the first surface of the second conductive portion is in contact with the first surface of the first conductive portion, and the second surface of the second conductive portion is in contact with the first surface of the output terminal portion. The electrode terminal and the output terminal portion are electrically connected,
The electrical storage device in which the electrode terminal and the output terminal part are electrically separated in the second state in which the insulating part is inserted between the first conductive part and the output terminal part. The electricity storage device according to claim 1,
The switch part is
In the first state, the power storage device further includes a pressing portion that presses the first conductive portion, the second conductive portion, and the output terminal portion so as to contact each other. The electricity storage device according to claim 2,
The pressing portion is
A screw portion having a shaft portion and an insulating head portion;
The shaft portion is screwed with the first conductive portion,
The power storage device, wherein the head presses the output terminal portion. The electricity storage device according to claim 3,
The power storage device, wherein the output terminal portion does not contact the shaft portion. The electricity storage device according to claim 3 or 4,
The plate-like portion of the second conductive portion is
As seen from the direction perpendicular to the first surface of the second conductive portion, in the first state, the plate-like portion has a recess so as to surround a part of the periphery of the shaft portion of the screw portion, Power storage device. The electricity storage device according to any one of claims 1 to 5,
The first surface of the first conductive portion and the first surface of the output terminal portion are arranged to face each other with a gap,
The electricity storage device in which the first state and the second state are switched by inserting the plate-like portion or the insulating portion of the second conductive portion into the gap. The electricity storage device according to claim 6,
An end of the plate-like portion of the second conductive portion and an end portion of the insulating portion that are inserted into the gap are tapered. The electricity storage device according to any one of claims 1 to 7,
The switch part is
An electricity storage device further comprising a support part that supports the second conductive part and the insulating part. The electricity storage device according to claim 8,
The electricity storage device further comprising a locking portion that locks the support portion in the first state or the second state. The electricity storage device according to any one of claims 1 to 9,
The electrical storage device, wherein the electrode terminal is the positive terminal of the electrical storage cell. The electricity storage device according to any one of claims 1 to 10,
A plurality of the storage cells are provided,
The power storage device, wherein the plurality of power storage cells are connected in series. The electricity storage device according to any one of claims 1 to 11,
The electricity storage device, wherein the electricity storage cell is a lithium ion capacitor. A first conductive portion having a first surface and electrically connected to one electrode terminal of the positive electrode terminal and the negative electrode terminal of the storage cell;
An output terminal portion having a first surface;
It has a switch part that can be electrically separated and connected,
The switch part is
A second conductive portion having a plate-like portion having a first surface and a second surface, wherein the plate-like portion is detachably disposed between the first conductive portion and the output terminal portion;
An insulating portion disposed so as to be able to be inserted and removed between the first conductive portion and the output terminal portion;
Have
In the first state, the first surface of the second conductive portion is in contact with the first surface of the first conductive portion, and the second surface of the second conductive portion is in contact with the first surface of the output terminal portion. The electrode terminal and the output terminal portion are electrically connected,
A switch for an electricity storage device, wherein the electrode terminal and the output terminal part are electrically separated in a second state in which the insulating part is inserted between the first conductive part and the output terminal part.

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