JP2017059503A - Power storage device and manufacturing method for power storage device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power storage device capable of enhancing the degree of freedom of fitting and removal of a sensor.SOLUTION: A power storage device 1 includes a power storage element 100, a sensor to be fitted to the power storage element 100, and a holding member 30 for holding the sensor. The holding member 30 has an opening portion 31a in which the sensor is inserted, and a first fitting portion 33 fitted to the sensor. The sensor has a second fitting portion 52 that is fitted to the first fitting portion 33 between the first fitting portion 33 and the power storage element 100. The opening portion 31a has a shape larger than the outer shape of the second fitting portion 52 from the outer surface 31b of the holding member 30 to the position where the second fitting portion 52 is disposed.SELECTED DRAWING: Figure 11

Description

  The present invention relates to a power storage device including a power storage element and a sensor attached to the power storage element, and a manufacturing method thereof.

  2. Description of the Related Art Conventionally, a power storage device that includes a power storage element and can measure the temperature of the power storage element by attaching a sensor such as a temperature sensor such as a thermistor to the power storage element is known (for example, a patent) Reference 1). In this power storage device, after the thermistor is attached to the case unit, the thermistor is pressed against the upper surface of the power storage element by placing the case unit on the power storage element.

JP2013-152918A

  However, the conventional power storage device has a problem that the degree of freedom of sensor attachment and detachment is limited, and thus there is a case where the manufacture of the power storage device and the replacement of the sensor cannot be performed efficiently.

  That is, in the conventional power storage device, it is necessary to hold a sensor such as a thermistor on a holding member such as a case unit and then attach the holding member to the power storage element. Further, when removing the sensor, it is necessary to remove the holding member from the power storage element and then remove the sensor from the holding member. For this reason, since the degree of freedom of attachment and detachment of the sensor is limited at the time of manufacturing the power storage device or replacing the sensor, the efficiency may be reduced.

  The present invention has been made to solve the above-described problems, and an object thereof is to provide a power storage device that can improve the degree of freedom of attachment and detachment of a sensor and a method for manufacturing the same.

  In order to achieve the above object, a power storage device according to one embodiment of the present invention includes a power storage element, a sensor attached to the power storage element, and a holding member that holds the sensor. The sensor includes an opening into which the sensor is inserted and a first engagement portion that engages with the sensor, and the sensor includes the first engagement portion between the first engagement portion and the power storage element. A second engaging portion that engages with the opening, and the opening extends from an outer surface of the holding member to a position where the second engaging portion is disposed, than the outer shape of the second engaging portion. Has a large shape.

  According to this, in the power storage device, an opening having a shape larger than the outer shape of the second engagement portion is formed in the holding member from the outer surface to the position where the second engagement portion of the sensor is disposed. Has been. For this reason, even after the holding member is attached to the power storage element, the sensor is inserted into the opening of the holding member to engage the first engagement portion of the holding member and the second engagement portion of the sensor. Thus, the sensor can be attached to the holding member. Further, by pulling out the sensor from the opening of the holding member, the sensor can be removed from the holding member without removing the holding member from the power storage element. In this manner, in the power storage device, the degree of freedom for sensor attachment and removal can be improved.

  The opening has a shape corresponding to the outer shape of the second engagement portion from the outer surface of the holding member to a position where the second engagement portion is disposed, and the second engagement The part may be arranged at a position where the shape of the opening is rotated around the central axis of the sensor.

  According to this, the 2nd engaging part of a sensor is arrange | positioned in the position which rotated the shape of the opening part of the holding member around the central axis of the sensor. That is, the first engaging portion and the second engaging portion can be engaged by inserting the second engaging portion of the sensor into the opening of the holding member and rotating the sensor.

  Further, at least one of the sensor and the holding member may include a biasing portion that biases the sensor toward the power storage element.

  According to this, a sensor can be reliably attached with respect to an electrical storage element by energizing a sensor toward an electrical storage element by an energizing part.

  The first engagement portion may be a recess formed on the surface of the holding member on the power storage element side.

  According to this, a sensor can be easily positioned with respect to a holding member because the 2nd engaging part of a sensor fits into the recessed part of the 1st engaging part of a holding member.

  The holding member further includes a guide portion that guides the second engagement portion from the opening to the first engagement portion, and the guide portion is a surface of the holding member on the power storage element side. It may be a recess formed between the first engaging portion and the opening, and connected to the opening.

  According to this, the holding member has a guide portion that is formed between the first engagement portion and the opening and is a recess connected to the opening. For this reason, after the second engaging portion of the sensor is slid from the opening portion of the holding member to the guide portion, the second engaging portion is easily moved to the first engaging portion, so that the second engaging portion can be easily engaged with the first engaging portion. Can be led to the department.

  In addition, the guide portion may have an inclined surface that is inclined with respect to an end surface of the holding member on the power storage element side.

  According to this, since the guide part of the holding member has the inclined surface, the second engaging part can be easily moved to the first by sliding the second engaging part of the sensor along the inclined surface. It can be guided to the engaging portion.

  In order to achieve the above object, a method for manufacturing a power storage device according to one embodiment of the present invention includes a power storage element, a sensor attached to the power storage element, and a holding member that holds the sensor. A method of manufacturing an apparatus, wherein after the holding member is attached to the power storage element, the second engaging portion of the sensor is configured to have a shape larger than the outer shape of the second engaging portion. An insertion step of inserting along the opening, and an engagement step of engaging the second engagement portion with the first engagement portion between the first engagement portion of the holding member and the power storage element; including.

  According to this, after attaching the holding member to the power storage element, the second engaging portion of the sensor is inserted along the opening of the holding member having a shape larger than the outer shape of the second engaging portion, The second engaging portion is engaged with the first engaging portion of the holding member. That is, even after the holding member is attached to the power storage element, the sensor is inserted into the opening of the holding member to engage the first engaging portion of the holding member and the second engaging portion of the sensor. Thus, the sensor can be attached to the holding member. In addition, by removing the sensor in the reverse order of attachment to the holding member, the sensor can be removed from the holding member without removing the holding member from the power storage element. In this manner, in the power storage device, the degree of freedom for sensor attachment and removal can be improved.

  Note that the present invention can be realized not only as such a power storage device but also as a sensor and a holding member included in the power storage device.

  According to the power storage device of the present invention, the degree of freedom of attachment and detachment of the sensor can be improved.

It is a perspective view which shows the external appearance of the electrical storage apparatus which concerns on embodiment of this invention. It is a disassembled perspective view which shows each component at the time of decomposing | disassembling the electrical storage apparatus which concerns on embodiment of this invention. It is a disassembled perspective view which shows each component at the time of decomposing | disassembling the electrical storage unit which concerns on embodiment of this invention. It is a perspective view which shows the structure by which the thermistor which concerns on embodiment of this invention was attached to the holding member. It is a perspective view which shows the structure of the thermistor which concerns on embodiment of this invention. It is an expansion perspective view which expands and shows the structure of the thermistor attachment part of the holding member which concerns on embodiment of this invention. It is an expansion perspective view which expands and shows the structure of the thermistor attachment part of the holding member which concerns on embodiment of this invention. It is a figure which shows the structure of the thermistor attachment part of the holding member which concerns on embodiment of this invention in detail. It is a flowchart which shows the manufacturing method of the electrical storage apparatus which concerns on embodiment of this invention. It is a figure which shows the insertion process which inserts the thermistor which concerns on embodiment of this invention in the opening part of a holding member. It is a figure which shows the engagement process which engages the 2nd engagement part of the thermistor which concerns on embodiment of this invention with the 1st engagement part of a holding member. It is a figure which shows the structure in the state in which the thermistor which concerns on embodiment of this invention was attached to the holding member. It is a figure which shows the structure in the state in which the thermistor which concerns on the modification 1 of embodiment of this invention was attached to the holding member. It is a figure which shows the structure in the state in which the thermistor which concerns on the modification 2 of embodiment of this invention was attached to the holding member.

  Hereinafter, a power storage device according to an embodiment of the present invention will be described with reference to the drawings. Each of the embodiments described below shows a preferred specific example of the present invention. Numerical values, shapes, materials, constituent elements, arrangement positions and connection forms of constituent elements, and the like shown in the following embodiments are merely examples, and are not intended to limit the present invention. In addition, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims indicating the highest concept are described as optional constituent elements. In each drawing, dimensions and the like are not strictly illustrated.

(Embodiment)
First, the configuration of the power storage device 1 will be described.

  FIG. 1 is a perspective view showing an appearance of power storage device 1 according to the embodiment of the present invention. FIG. 2 is an exploded perspective view showing each component when the power storage device 1 according to the embodiment of the present invention is disassembled.

  In these figures, the Z-axis direction is shown as the vertical direction, and the Z-axis direction will be described below as the vertical direction. However, depending on the usage, the Z-axis direction may not be the vertical direction. The axial direction is not limited to the vertical direction. The same applies to the following drawings.

  The power storage device 1 is a device that can charge electricity from the outside and discharge electricity to the outside. For example, the power storage device 1 is a battery module used for power storage use, power supply use, and the like. As illustrated in FIGS. 1 and 2, the power storage device 1 includes an exterior body 10 including a first exterior body 11 and a second exterior body 12, and an electrical storage unit 20 and a holding member housed inside the exterior body 10. 30, bus bars 41 and 42, a thermistor 50, and the like.

  The exterior body 10 is a rectangular (box-shaped) container (module case) that constitutes the exterior body of the power storage device 1. That is, the exterior body 10 is disposed outside the power storage unit 20, the holding member 30, the bus bars 41 and 42, and the thermistor 50. The power storage unit 20 and the like are disposed at predetermined positions, and the power storage unit 20 and the like are protected from impact. Protect. The exterior body 10 is made of an insulating resin material such as polycarbonate (PC), polypropylene (PP), polyethylene (PE), polyphenylene sulfide resin (PPS), polybutylene terephthalate (PBT), or ABS resin. Yes. Thus, the outer package 10 avoids the storage unit 20 and the like from coming into contact with an external metal member or the like.

  Here, the exterior body 10 includes a first exterior body 11 constituting a lid body of the exterior body 10 and a second exterior body 12 constituting a main body of the exterior body 10. The first exterior body 11 is a flat rectangular cover member that closes the opening of the second exterior body 12, and is provided with a positive external terminal 13 and a negative external terminal 14. The power storage device 1 charges electricity from the outside via the positive electrode external terminal 13 and the negative electrode external terminal 14 and discharges electricity to the outside. The second exterior body 12 is a bottomed rectangular cylindrical housing having an opening, and houses the power storage unit 20, the holding member 30, the bus bars 41 and 42, the thermistor 50, and the like.

  In addition, the 1st exterior body 11 and the 2nd exterior body 12 may be formed with the member of the same material, and may be formed with the member of a different material.

  Moreover, although electrical equipment, such as a circuit board and a relay, is arrange | positioned inside the 1st exterior body 11, illustration of the said electrical equipment is abbreviate | omitted. That is, the first exterior body 11 is configured to be separable into two members in the vertical direction (Z-axis direction), and the electric device is disposed between the two members. As a result, the electrical device is protected from impact and the like, and is prevented from coming into contact with an external metal member or the like.

  The circuit board is connected to, for example, a power storage element 100 in a power storage unit 20 described later by wiring, and acquires various types of information such as a charge state, a discharge state, a voltage value, a current value, and a temperature of the power storage element 100. In addition, a control circuit is provided for monitoring, controlling, controlling ON / OFF of the relay, and communicating with other devices. Here, the temperature of the electricity storage element 100 is a temperature obtained using the thermistor 50. That is, the control circuit is connected to the thermistor 50 provided in contact with the power storage element 100 via the wiring (lead wire), and converts information (resistance value) transmitted from the thermistor 50 into temperature. The temperature of the storage element 100 is acquired. Details will be described later.

  The power storage unit 20 includes a plurality of power storage elements 100 (in this embodiment, twelve power storage elements 100) and a plurality of bus bars 200, and a positive external terminal 13 provided on the first exterior body 11 It is electrically connected to the negative external terminal 14. That is, the positive electrode terminal of any one of the plurality of power storage elements 100 is electrically connected to the positive external terminal 13 via the bus bar 200. In addition, the negative electrode terminal of any one of the plurality of power storage elements 100 is electrically connected to the negative electrode external terminal 14 via the bus bar 200.

  The power storage units 20 are arranged in the second exterior body 12 in the X-axis direction in a state where the plurality of power storage elements 100 are placed vertically. The power storage unit 20 is housed inside the exterior body 10 by covering the first exterior body 11 from above. The detailed configuration of the power storage unit 20 will be described later.

  The holding member 30 holds the bus bars 41 and 42, other electrical components such as relays, wirings, and the like (not shown), insulation between the bus bars 41 and 42 and the other members, and the bus bar 41, This is an electrical component tray capable of regulating the position of 42 or the like. In particular, the holding member 30 positions the bus bars 41 and 42 with respect to the bus bar 200, the positive external terminal 13, and the negative external terminal 14 in the power storage unit 20.

  Specifically, holding member 30 is placed above power storage unit 20 (Z-axis direction plus side) and positioned with respect to power storage unit 20. Further, the bus bars 41 and 42 are placed on the holding member 30 and positioned. Further, the first exterior body 11 is disposed on the holding member 30. Accordingly, the bus bars 41 and 42 are positioned with respect to the bus bar 200 in the power storage unit 20 and the positive external terminal 13 and the negative external terminal 14 provided in the first exterior body 11.

  The holding member 30 also has a function of holding the thermistor 50. That is, an opening is formed in the holding member 30, and the thermistor 50 is positioned with respect to the storage element 100 by inserting and rotating the thermistor 50 in the opening, and with respect to the storage element 100. Fix in the pressed state. A detailed description of the configuration in which the thermistor 50 is attached to the holding member 30 will be described later.

  The holding member 30 is formed of an insulating resin material such as PC, PP, PE, PPS, PBT, or ABS resin. However, the holding member 30 is formed of any material as long as it is an insulating member. It doesn't matter.

  The bus bars 41 and 42 electrically connect the bus bar 200 in the power storage unit 20 to the positive external terminal 13 and the negative external terminal 14 provided in the first exterior body 11. That is, the bus bar 41 is a conductive member that electrically connects the bus bar 200 disposed at one end in the power storage unit 20 and the positive external terminal 13, and the bus bar 42 is disposed at the other end in the power storage unit 20. This is a conductive member that electrically connects the bus bar 200 and the negative external terminal 14.

  The bus bars 41 and 42 are made of, for example, copper as a conductive member, but the material of the bus bars 41 and 42 is not particularly limited. Further, the bus bars 41 and 42 may be formed of members made of the same material, or may be formed of members made of different materials.

  The thermistor 50 is a temperature sensor attached to the power storage element 100. That is, the thermistor 50 is attached in a pressed state to the lid portion of the power storage element 100 and measures the temperature of the power storage element 100. In the present embodiment, two thermistors 50 are arranged for two power storage elements 100.

  Specifically, the thermistor 50 is positioned with respect to the power storage element 100 and is pressed against the power storage element 100 by being attached to the holding member 30 after the holding member 30 is attached to the power storage element 100. Is done. Note that the principle by which the thermistor 50 measures the temperature is the same as that of a conventional thermistor, and a detailed description thereof will be omitted. Further, a detailed description of the configuration of the thermistor 50 and a detailed description of a configuration in which the thermistor 50 is attached to the power storage element 100 will be described later.

  Next, the configuration of the power storage unit 20 will be described in detail.

  FIG. 3 is an exploded perspective view showing each component when the power storage unit 20 according to the embodiment of the present invention is disassembled.

  As shown in the figure, the power storage unit 20 includes a plurality of power storage elements 100, a plurality of bus bars 200, a plurality of spacers 300 (a plurality of spacers 310 and a pair of spacers 320), a pair of clamping members 400, and a plurality of The restraining member 500, the bus bar frame 600, and the heat shield plate 700 are provided.

  The power storage element 100 is a secondary battery (unit cell) that can charge and discharge electricity, and more specifically, a non-aqueous electrolyte secondary battery such as a lithium ion secondary battery. . The power storage element 100 has a flat rectangular shape and is disposed adjacent to the spacer 310. That is, each of the plurality of power storage elements 100 is alternately arranged with each of the plurality of spacers 310 and arranged in the X-axis direction. In the present embodiment, twelve power storage elements 100 are arranged adjacent to eleven spacers 310 alternately. In addition, the electrical storage element 100 is not limited to a nonaqueous electrolyte secondary battery, A secondary battery other than a nonaqueous electrolyte secondary battery may be sufficient, and a capacitor may be sufficient as it.

  As shown in the figure, the electricity storage device 100 includes a container 110, a positive electrode terminal 120, and a negative electrode terminal 130. An electrode body (power generation element), a current collector (a positive electrode current collector and a negative electrode current collector), and the like are disposed inside the container 110, and a liquid such as an electrolytic solution (nonaqueous electrolyte) is enclosed therein. However, detailed description is omitted.

  The container 110 includes a container main body having a rectangular cylindrical shape made of metal and having a bottom, and a metal lid that closes an opening of the container main body. In addition, the container 110 can seal the inside by accommodating the electrode body and the like and then welding the lid part and the container body. As described above, the container 110 is a rectangular parallelepiped having a lid on the positive side in the Z-axis direction, a long side surface on the side surfaces on both sides in the X-axis direction, a short side surface on the side surfaces on both sides in the Y-axis direction, It is a container of shape. The material of the container 110 is not particularly limited, but is preferably a weldable metal such as stainless steel, aluminum, or aluminum alloy.

  The positive electrode terminal 120 is an electrode terminal electrically connected to the positive electrode of the electrode body through a positive electrode current collector, and the negative electrode terminal 130 is electrically connected to the negative electrode of the electrode body through a negative electrode current collector. These are connected electrode terminals, both of which are attached to the lid of the container 110. That is, the positive electrode terminal 120 and the negative electrode terminal 130 lead the electricity stored in the electrode body to the external space of the power storage element 100, and introduce electricity into the internal space of the power storage element 100 in order to store electricity in the electrode body. This is a metal electrode terminal. In the present embodiment, power storage element 100 is arranged with positive electrode terminal 120 and negative electrode terminal 130 facing upward.

  Bus bar 200 is a bus bar that is electrically connected to each of the plurality of power storage elements 100 in power storage unit 20. That is, the bus bar 200 is a conductive member that is electrically connected to each electrode terminal included in the plurality of power storage elements 100, and any one of the electrode terminals included in the plurality of power storage elements 100 is electrically connected to each other. To do. Specifically, the bus bar 200 is disposed on the surface of each electrode terminal included in the plurality of power storage elements 100 and connected (joined) to the electrode terminal.

  In the present embodiment, five bus bars 200 are arranged, and twelve power storage elements 100 include four sets of three power storage elements 100 connected in parallel by the five bus bars 200. The configuration is connected in series. In addition, the bus bar 200 disposed at the end is connected to the above-described bus bars 41 and 42, and is thereby electrically connected to the positive external terminal 13 and the negative external terminal 14.

  The bus bar 200 is made of, for example, aluminum as a conductive member, but the material of the bus bar 200 is not particularly limited. Further, the bus bars 200 may all be formed of members of the same material, or any of the bus bars 200 may be formed of members of different materials.

  The spacer 300 includes a plurality of spacers 310 and a pair of spacers 320, and is formed of an insulating resin such as PC, PP, PE, PPS, PBT, or ABS resin. The spacers 310 and 320 may be formed of any material as long as they are insulating members, and all of them may be formed of members of the same material. It may be formed of a member of a different material.

  The spacer 310 is a plate-like member that is disposed on the side (X-axis direction plus side or minus side) of the electricity storage element 100 and insulates the electricity storage element 100 from other members. That is, the spacer 310 is disposed between two adjacent power storage elements 100 and insulates between the two power storage elements 100. In the present embodiment, eleven spacers 310 are arranged between each of the twelve power storage elements 100.

  In addition, the spacer 310 is formed so as to cover approximately half of the power storage element 100 on the front side or the back side (substantially half when divided into two in the X-axis direction). That is, a recess is formed on both the front side or the back side of the spacer 310 (both sides in the X-axis direction), and approximately half of the power storage element 100 is inserted into the recess. With such a configuration, the spacer 310 on the side of the power storage element 100 covers most of the power storage element 100, so that the insulating property between the power storage element 100 and another conductive member is covered by the spacer 310. Can be improved. The spacer 310 is formed so as not to cover the portion of the power storage element 100 where the thermistor 50 is located so that the thermistor 50 can come into contact with the power storage element 100.

  The spacer 320 is a plate-like member that is disposed between the sandwiching member 400 and the exterior body 10 described later, and insulates between the sandwiching member 400 and the exterior body 10. The spacer 320 also has a function as a buffer member that protects the power storage unit 20 when an external impact is applied to the exterior body 10. In other words, the pair of spacers 320 are disposed between the pair of sandwiching members 400 and the exterior body 10 so as to sandwich the pair of sandwiching members 400 from both sides, and insulate the power storage element 100 and the like in the power storage unit 20. And protect from external impacts.

  The clamping member 400 and the restraining member 500 are members that press the power storage element 100 from the outside in the stacking direction of the electrode bodies of the power storage element 100. That is, the sandwiching member 400 and the restraining member 500 press the respective power storage elements 100 included in the plurality of power storage elements 100 from both sides by sandwiching the plurality of power storage elements 100 from both sides in the stacking direction. Note that the stacking direction of the electrode bodies of the power storage element 100 is a direction in which the positive electrode, the negative electrode, and the separator of the electrode body are stacked, and is the same direction as the arrangement direction (X-axis direction) of the plurality of power storage elements 100. That is, the plurality of power storage elements 100 are arranged in the stacking direction.

  Specifically, the clamping member 400 is a flat plate member (end plate) disposed on both sides in the X-axis direction of the plurality of power storage elements 100, and the plurality of power storage elements 100 and the plurality of spacers 310 are connected to the plurality of power storage elements. The element 100 and the plurality of spacers 310 are sandwiched and held from both sides in the arrangement direction (X-axis direction). The sandwiching member 400 is formed of a metal (conductive) member such as stainless steel or aluminum from the viewpoint of strength or the like, but is not limited thereto, and is formed of an insulating member having high strength, for example. May be.

  The restraining member 500 is a long and flat member (constraint bar) that is attached to the sandwiching member 400 at both ends and restrains the plurality of power storage elements 100. That is, the restraining member 500 is disposed so as to straddle the plurality of power storage elements 100 and the plurality of spacers 310 and restrains the plurality of power storage elements 100 and the plurality of spacers 310 in the arrangement direction (X-axis direction). Giving power.

  In the present embodiment, two restraining members 500 are arranged on both sides (Y-axis direction both sides) of the plurality of power storage elements 100, and the plurality of power storage elements 100 are separated from the both sides by the two restraining members 500. Hold and restrain. The restraining member 500 is preferably formed of a metal member such as stainless steel or aluminum, for example, similarly to the clamping member 400, but may be formed of a member other than metal.

  The bus bar frame 600 is a member that can insulate the bus bar 200 from other members and regulate the position of the bus bar 200. In particular, the bus bar frame 600 positions the bus bar 200 with respect to the plurality of power storage elements 100 in the power storage unit 20.

  Specifically, bus bar frame 600 is placed above the plurality of power storage elements 100 (Z-axis direction plus side) and positioned with respect to the plurality of power storage elements 100. In addition, the bus bar 200 is placed and positioned on the bus bar frame 600. As a result, the bus bar 200 is positioned with respect to the plurality of power storage elements 100, and each of the plurality of power storage elements 100 has through the bus bar opening 610 that is a through hole formed in the bus bar frame 600. Bonded to the electrode terminal. The bus bar frame 600 is formed of an insulating resin material such as PC, PP, PE, PPS, PBT, or ABS resin. However, the bus bar frame 600 is formed of any material as long as it is an insulating member. It doesn't matter.

  The bus bar frame 600 is formed with two thermistor openings 620 that are through holes into which the two thermistors 50 are inserted. The two thermistors 50 are inserted into the two thermistor openings 620, respectively, and come into contact with the lid of the container 110 of the power storage device 100.

  The heat shield plate 700 is a plate-like member having heat insulation disposed inside the exhaust passage of the safety valve of the power storage element 100. Specifically, heat shield plate 700 is disposed above bus bar frame 600 so as to be positioned above the safety valve of power storage element 100. In other words, the heat shield plate 700 protects electrical equipment such as a circuit board disposed above the power storage unit 20 from the heat of the gas when gas is discharged from the safety valve of the power storage element 100 in an abnormal state or the like. In this embodiment, the heat shield plate 700 is formed of a metal material such as stainless steel having low thermal conductivity. However, the present invention is not limited to this, and any material that has high heat resistance and low thermal conductivity may be used. For example, it may be formed of a resin such as PPS or PBT reinforced with glass fiber, or ceramic.

  In the power storage device 1 configured as described above, a configuration in which the thermistor 50 is attached to the holding member 30 (that is, a configuration in which the thermistor 50 is attached to the power storage element 100) will be described in detail below.

  FIG. 4 is a perspective view showing a configuration in which the thermistor 50 according to the embodiment of the present invention is attached to the holding member 30 (the thermistor 50 is attached to the storage element 100).

  As shown in the figure, the two thermistors 50 are attached to the holding member 30, so that the two thermistors 50 are attached to the two power storage elements 100. Thereby, each of the thermistors 50 can measure the temperature of each attached power storage element 100. Note that the number of thermistors 50 is not limited to two, and may be one or three or more. The thermistors 50 are appropriately determined depending on the number of power storage elements 100 whose temperature is to be measured, the temperature measurement position of the power storage elements 100, and the like. Is done.

  Here, in the drawing, a portion of the holding member 30 to which the thermistor 50 is attached is shown as a thermistor attachment portion A. Hereinafter, the configuration of the thermistor 50 and the configuration of the thermistor mounting portion A of the holding member 30 will be described in detail.

  FIG. 5 is a perspective view showing a configuration of the thermistor 50 according to the embodiment of the present invention.

  6A and 6B are enlarged perspective views showing the configuration of the thermistor mounting portion A of the holding member 30 according to the embodiment of the present invention in an enlarged manner. Specifically, FIG. 6A is an enlarged perspective view when the thermistor mounting portion A shown in FIG. 4 is viewed from above, and FIG. 6B is an enlarged perspective view when the thermistor mounting portion A is viewed from below. FIG.

  Moreover, FIG. 7 is a figure which shows the structure of the thermistor attachment part A of the holding member 30 which concerns on embodiment of this invention in detail. Specifically, FIG. 7A is a plan view when the thermistor mounting portion A shown in FIG. 4 is viewed from the Z-axis direction plus side, and FIG. 7B is the thermistor mounting. It is sectional drawing at the time of cut | disconnecting the part A by a surface parallel to a XZ plane.

  First, as shown in FIG. 5, the thermistor 50 includes a column portion 51 that is a main body of the thermistor 50 and a second engagement portion 52 that protrudes from the column portion 51. A lead wire 53 is connected to the upper portion of the column portion 51.

  The column part 51 is a cylindrical part having a built-in thermistor element body. Specifically, the outer shell of the column portion 51 is made of, for example, aluminum, and the thermistor element main body is accommodated inside the column portion 51, resin is injected, and the thermistor element main body is embedded. Yes. The shape of the column part 51 is not limited to a cylindrical shape, and may be a prism shape, a cone shape, a pyramid shape, or the like. Further, the method for accommodating the thermistor element main body inside the column part 51 is not limited, and a conventional configuration or the like is appropriately selected.

  Further, the lead wire 53 is connected to the thermistor element body inside the column portion 51 and extends from the upper portion of the column portion 51. That is, the lead wire 53 is a cable having one end connected to the column portion 51 and the other end connected to a circuit board disposed inside the first exterior body 11, and the resistance value of the thermistor element body is determined as the circuit. Communicate to the board. That is, the thermistor element body is an electrical resistance element whose resistance value changes in response to temperature, and the resistance value of the thermistor element body corresponding to the temperature of the power storage element 100 is transmitted to the circuit board. The acquired resistance value is converted into temperature. In the figure, the configuration in which one end of the lead wire 53 is connected to the column portion 51 is shown, and the configuration in which the other end of the lead wire 53 is connected to the circuit board is omitted. It may be directly connected to the circuit board or may be connected via other wiring.

  The second engaging portion 52 is a flat plate-like protruding portion that protrudes outward from the lower end portion (end portion on the minus side in the Z-axis direction) of the column portion 51. Specifically, the second engaging portion 52 has two projecting portions that project from both sides of the column portion 51 (in the figure, both sides in the X-axis direction). In the present embodiment, the second engagement portion 52 is integrally formed with the column portion 51, but may be formed separately from the column portion 51. That is, in the present embodiment, the second engagement portion 52 is formed of the same material (for example, aluminum) as the column portion 51, but may be formed of a material different from that of the column portion 51.

  Further, the second engaging portion 52 has a shape corresponding to an opening 31a of the holding member 30 described later (a shape smaller than the opening 31a), and is inserted into the opening 31a. The second engagement portion 52 engages with the first engagement portion 33 between a first engagement portion 33 of the holding member 30 described later and the power storage element 100. Details will be described later. The shape and number of the second engaging portions 52 are not limited to the above, and can be attached to the power storage element 100 by being inserted into the opening 31 a of the holding member 30 and engaged with the first engaging portion 33. Any shape and number may be used.

  As shown in FIGS. 6A, 6B, and 7, the holding member 30 has a thermistor insertion portion 31 and a biasing force at a position recessed from the upper surface 30a (a position protruding from the lower surface 30b) in the thermistor mounting portion A. It has a portion 32, a first engagement portion 33, and a guide portion 34.

  The thermistor insertion part 31 is a part into which the thermistor 50 is inserted, and is a substantially cylindrical part formed to protrude upward from the back surface side of the holding member 30. That is, the thermistor insertion part 31 is formed with an opening 31a into which the thermistor 50 is inserted. The opening 31a is a part that forms an insertion path into which the thermistor 50 is inserted, and is a part that is formed by the inner wall surface of the thermistor insertion part 31 that surrounds the insertion path.

  Here, the opening 31 a has a shape larger than the outer shape of the second engagement portion 52 from the outer surface of the holding member 30 to the position where the second engagement portion 52 of the thermistor 50 is disposed. . Specifically, the opening 31 a has a shape corresponding to the outer shape of the second engaging portion 52 from the outer surface of the holding member 30 to the position where the second engaging portion 52 is disposed.

  That is, the opening 31 a extends from the outer surface 31 b of the thermistor insertion portion 31 of the holding member 30 to the inner surface 31 c of the thermistor insertion portion 31 where the second engagement portion 52 of the thermistor 50 is disposed. It has a shape larger than the outer shape of the joint portion 52. Specifically, the opening 31 a has a shape corresponding to the outer shape of the second engagement portion 52 from the outer surface 31 b to the inner surface 31 c of the thermistor insertion portion 31. The outer surface 31b is a surface on the outer side (Z-axis direction plus side) of the thermistor insertion portion 31, and the inner surface 31c is a surface on the inner side (Z-axis direction minus side) of the thermistor insertion portion 31.

  Here, “the opening 31 a has a shape corresponding to the outer shape of the second engaging portion 52” means that the opening 31 a has a shape in which the second engaging portion 52 can be inserted (passed). That is, it means that the size of the smallest opening among the openings of the opening 31a is substantially the same shape as the outer shape of the second engaging portion 52 or a shape slightly larger than the outer shape. In the present embodiment, the shape of the opening 31 a in the lower portion of the thermistor insertion portion 31 is substantially the same as the outer shape of the second engagement portion 52 or a shape slightly larger than the outer shape. In addition, an opening (groove portion) that is substantially the same as or wider than the width of the second engagement portion 52 is formed in a portion above the lower portion of the thermistor insertion portion 31, and the second engagement portion 52 can be inserted (passed).

  The urging portion 32 is a portion that urges the thermistor 50 toward the power storage element 100 and is connected to the thermistor insertion portion 31. Specifically, the urging portion 32 surrounds the outer periphery of the lower portion of the thermistor insertion portion 31, is connected to the lower portion, extends from the lower portion to the central portion of the thermistor insertion portion 31, and further curves downward. Has the shape. With this configuration, the urging portion 32 is a portion having elasticity.

  That is, when the thermistor insertion part 31 moves upward (or downward), the urging part 32 gives an urging force that pushes back the thermistor insertion part 31 downward (or upward). Specifically, when the thermistor 50 is inserted into the thermistor insertion portion 31 and the thermistor insertion portion 31 is pushed upward, the biasing portion 32 moves the thermistor 50 together with the thermistor insertion portion 31 to the lower storage element 100. Energize towards.

  The first engagement portion 33 is a portion that engages with the thermistor 50. Specifically, the first engagement portion 33 is a recess formed on the surface of the holding member 30 on the power storage element 100 side and engages with the second engagement portion 52 of the thermistor 50. That is, the first engagement portion 33 is a rectangular recess formed in the inner surface 31 c of the thermistor insertion portion 31, and the width of the second engagement portion 52 is set so as to be fitted to the second engagement portion 52. Have approximately the same width. In order to prevent the thermistor 50 from rotating, it is preferable that the first engaging portion 33 be fitted to the second engaging portion 52, but it is not always necessary to be fitted to the second engaging portion 52. Any shape that can be engaged with the thermistor 50 is acceptable.

  The guide part 34 is a part that guides the second engagement part 52 of the thermistor 50 from the opening 31 a to the first engagement part 33. Specifically, the guide portion 34 is a recess formed between the first engagement portion 33 and the opening 31a on the surface of the holding member 30 on the power storage element 100 side and connected to the opening 31a. . Further, the guide portion 34 has an inclined surface that is inclined with respect to the end surface of the holding member 30 on the power storage element 100 side.

  That is, the guide part 34 is a recess formed on the inner surface 31 c of the thermistor insertion part 31 so as to extend from the opening 31 a toward the first engagement part 33. The guide portion 34 has an inclined surface inclined with respect to the inner surface 31 c of the thermistor insertion portion 31, that is, an inclined surface inclined downward from the opening portion 31 a toward the first engagement portion 33. With this configuration, the guide portion 34 can smoothly guide the second engagement portion 52 inserted into the opening portion 31 a to the first engagement portion 33.

  Next, a method of attaching the thermistor 50 to the holding member 30 (a method of attaching the thermistor 50 to the electricity storage element 100) when manufacturing the electricity storage device 1 (or when replacing the thermistor 50) will be described in detail.

  FIG. 8 is a flowchart showing a method for manufacturing power storage device 1 according to the embodiment of the present invention. Specifically, FIG. 3 is a flowchart showing a method of attaching the thermistor 50 to the holding member 30 (a method of attaching the thermistor 50 to the electricity storage element 100) in the method of manufacturing the electricity storage device 1.

  FIG. 9 is a diagram illustrating an insertion process of inserting the thermistor 50 according to the embodiment of the present invention into the opening 31 a of the holding member 30. FIG. 10 is a diagram illustrating an engagement process in which the second engagement portion 52 of the thermistor 50 according to the embodiment of the present invention is engaged with the first engagement portion 33 of the holding member 30.

  FIG. 11 is a diagram showing a configuration in a state where the thermistor 50 according to the embodiment of the present invention is attached to the holding member 30. Specifically, FIG. 10A is a plan view when the configuration of the thermistor 50 attached to the holding member 30 is viewed from the positive side in the Z-axis direction, and FIG. FIG. 3 is a cross-sectional view of the configuration cut along a plane parallel to the XZ plane.

  As shown in FIG. 8, first, the holding member 30 is attached to the power storage element 100 (S102). That is, the holding member 30 is placed on the power storage unit 20 having the plurality of power storage elements 100, and the holding member 30 is fixed to the plurality of power storage elements 100.

  Next, as the insertion step, the thermistor 50 is inserted into the opening 31a of the holding member 30 (S104). That is, the second engagement portion 52 of the thermistor 50 is inserted along the opening 31 a of the holding member 30 having a shape larger than the outer shape of the second engagement portion 52.

  Specifically, as shown in FIG. 9A, first, the thermistor 50 is disposed above the thermistor mounting portion A of the holding member 30. Then, as shown in FIG. 9B, the second engagement portion 52 of the thermistor 50 is inserted along the opening 31 a of the thermistor insertion portion 31 of the holding member 30. That is, as described above, the opening 31a has a shape corresponding to the outer shape of the second engagement portion 52 from the outer surface 31b to the inner surface 31c of the thermistor insertion portion 31, and therefore, the thermistor 50 is inserted into the thermistor. It can be inserted into the opening 31 a of the part 31.

  Next, as an engaging step, the second engaging portion 52 of the thermistor 50 is engaged with the first engaging portion 33 of the holding member 30 (S106). That is, the second engagement portion 52 of the thermistor 50 is engaged with the first engagement portion 33 between the first engagement portion 33 of the holding member 30 and the power storage element 100.

  Specifically, as shown in FIG. 10A, first, until the second engagement portion 52 reaches the position at the innermost side of the opening 31a, that is, the bottom surface of the second engagement portion 52 is The thermistor 50 is inserted until the inner surface 31c of the holding member 30 is substantially in the same position. In addition, the second engagement portion 52 comes into contact with the upper surface of the electricity storage device 100 (the upper surface of the lid portion of the container 110) by inserting the same up to this position. In this state, the inner surface 31 c of the thermistor insertion portion 31 is in contact with the upper surface of the energy storage device 100.

  Then, as shown in FIG. 10B, the second engagement portion 52 is slid from the opening 31 a of the holding member 30 to the guide portion 34 by rotating the thermistor 50. That is, the second engagement portion 52 moves to the guide portion 34 while sliding on the upper surface of the power storage element 100 while being sandwiched between the power storage element 100 and the holding member 30.

  Then, as shown in FIG. 10C, the second engagement portion 52 is slid from the guide portion 34 of the holding member 30 to the first engagement portion 33 by further rotating the thermistor 50. In other words, the second engagement portion 52 moves to the first engagement portion 33 while being further slid on the upper surface of the energy storage element 100 while being sandwiched between the energy storage element 100 and the holding member 30. At this time, since the second engaging portion 52 slides so as to slide on the inclined surface of the guide portion 34, the thermistor 50 can be smoothly rotated from the opening portion 31 a to the first engaging portion 33.

  The thermistor 50 is removed from the holding member 30 by further rotating the thermistor 50 until the second engagement portion 52 slides to the position of the opening 31 a of the holding member 30 from the state of FIG. be able to.

  Thus, as shown in FIG. 11, the second engagement portion 52 of the thermistor 50 is engaged with the first engagement portion 33 between the first engagement portion 33 of the holding member 30 and the power storage element 100. (In this embodiment, they are fitted). That is, as shown in FIG. 11A, the second engagement portion 52 is disposed at a position where the shape of the opening 31 a of the holding member 30 is rotated around the central axis of the thermistor 50. In the figure, the second engaging portion 52 is disposed at a position obtained by rotating the shape of the opening 31a about 45 ° around the central axis.

  Further, when the second engagement portion 52 moves from the opening portion 31a to the first engagement portion 33, the second engagement portion 52 slides on the inclined surface of the guide portion 34 while being in contact with the upper surface of the power storage element 100. The part 31 is pushed upward. That is, as the second engagement portion 52 slides on the inclined surface of the guide portion 34, the inner surface 31 c of the thermistor insertion portion 31 moves away from the upper surface of the power storage element 100. For this reason, the urging portion 32 generates a force that pushes the thermistor insertion portion 31 downward, and the thermistor 50 is urged toward the power storage element 100.

  As described above, according to the power storage device 1 according to the embodiment of the present invention, the holding member 30 extends from the outer surface 31b of the thermistor insertion portion 31 to the position where the second engagement portion 52 of the thermistor 50 is disposed. An opening 31a having a shape larger than the outer shape of the second engaging portion 52 is formed. For this reason, even after the holding member 30 is attached to the power storage element 100, the thermistor 50 is inserted into the opening 31 a of the holding member 30, and the first engagement portion 33 of the holding member 30 and the second of the thermistor 50 are inserted. The thermistor 50 can be attached to the holding member 30 by engaging the engaging portion 52. Further, by pulling out the thermistor 50 from the opening 31 a of the holding member 30, the thermistor 50 can be removed from the holding member 30 without removing the holding member 30 from the power storage element 100. As described above, in the power storage device 1, the degree of freedom in attaching and removing the thermistor 50 can be improved.

  The second engagement portion 52 of the thermistor 50 is disposed at a position where the shape of the opening 31 a of the holding member 30 is rotated around the central axis of the thermistor 50. That is, the second engagement portion 52 of the thermistor 50 is inserted into the opening 31 a of the holding member 30 and the thermistor 50 is rotated to engage the first engagement portion 33 and the second engagement portion 52. Is able to.

  Further, the thermistor 50 can be reliably attached to the power storage element 100 by biasing the thermistor 50 toward the power storage element 100 by the biasing portion 32.

  Further, the thermistor 50 can be easily positioned with respect to the holding member 30 by fitting the second engaging portion 52 of the thermistor 50 into the recess of the first engaging portion 33 of the holding member 30.

  The holding member 30 includes a guide portion 34 that is formed between the first engagement portion 33 and the opening portion 31a and is a concave portion connected to the opening portion 31a. Therefore, the second engagement portion 52 of the thermistor 50 is slid from the opening 31 a of the holding member 30 to the guide portion 34 and then moved to the first engagement portion 33, so that the second engagement can be easily performed. The part 52 can be guided to the first engaging part 33.

  Moreover, since the guide part 34 of the holding member 30 has an inclined surface, the second engaging part 52 can be easily moved by sliding the second engaging part 52 of the thermistor 50 along the inclined surface. The first engaging portion 33 can be guided.

  Further, according to the method for manufacturing power storage device 1 according to the embodiment of the present invention, after attaching holding member 30 to power storage element 100, second engagement portion 52 of thermistor 50 is changed to second engagement portion. The second engagement portion 52 is engaged with the first engagement portion 33 of the holding member 30 by being inserted along the opening 31 a of the holding member 30 having a shape larger than the outer shape of the 52. That is, even after the holding member 30 is attached to the storage element 100, the thermistor 50 is inserted into the opening 31 a of the holding member 30, and the second engagement between the first engagement portion 33 of the holding member 30 and the thermistor 50. The thermistor 50 can be attached to the holding member 30 by engaging the joint portion 52. Further, the thermistor 50 can be removed from the holding member 30 without removing the holding member 30 from the power storage element 100 by removing the thermistor 50 in the reverse order of attachment to the holding member 30. As described above, in the power storage device 1, the degree of freedom in attaching and removing the thermistor 50 can be improved.

(Modification 1)
Next, Modification 1 of the above embodiment will be described. In the above embodiment, the second engaging portion 52 is disposed at the lower end portion of the thermistor 50. However, in the present modification, the second engagement portion is disposed above the lower end portion of the thermistor.

  FIG. 12 is a diagram showing a configuration in a state where the thermistor 50 a according to the first modification of the embodiment of the present invention is attached to the holding member 30. Specifically, this figure corresponds to FIG. 11 in the above embodiment.

  As shown in FIG. 12, the thermistor 50a has a second engagement portion 52a above the lower end portion. That is, the holding member 30 has the first engagement portion 33a at the center of the thermistor insertion portion 31, and the thermistor 50a has the second engagement portion 52a at a position corresponding to the first engagement portion 33a. Have.

  Here, the opening 31a formed in the thermistor insertion portion 31 is larger than the outer shape of the second engagement portion 52a from the outer surface of the holding member 30 to the position where the second engagement portion 52a is disposed. have. Specifically, the opening 31a has a shape corresponding to the outer shape of the second engagement portion 52a from the outer surface 31b of the thermistor insertion portion 31 to the position where the second engagement portion 52a is disposed. Yes. Thereby, the thermistor 50a can be inserted into the opening 31a of the holding member 30, and the second engagement portion 52a can be engaged with the first engagement portion 33a by rotating after the thermistor 50a is inserted. . Moreover, the thermistor 50a can also be urged | biased toward the electrical storage element 100 by comprising the path | route from the opening part 31a in the holding member 30 to the 1st engaging part 33a similarly to the said embodiment.

  As described above, according to the power storage device according to the first modification of the embodiment of the present invention, the same effects as those of the above embodiment can be obtained. In particular, in the thermistor 50a, the arrangement position of the second engagement portion 52a can be freely determined, so that a shape that is easy to produce can be adopted, and the productivity of the power storage device can be improved.

(Modification 2)
Next, a second modification of the above embodiment will be described. In the embodiment described above, the second engagement portion 52 is formed by forming the projection portion in the thermistor 50. However, in this modification, the second engagement portion is formed by forming a recess in the thermistor.

  FIG. 13 is a diagram showing a configuration in a state where the thermistor 50 b according to the second modification of the embodiment of the present invention is attached to the holding member 30. Specifically, this figure corresponds to FIG. 11 in the above embodiment.

  As shown in FIG. 13, the thermistor 50 b has a recess formed on the outer periphery, and has a second engagement portion 52 b below the recess. Specifically, in the thermistor 50b, a concave portion is formed at a position where the second engagement portion 52a of the thermistor 50a in the first modification extends in the vertical direction to the end and the second engagement portion 52a is disposed. It has the structure which was made. That is, the thermistor 50b has the same external shape as the thermistor 50a in the first modification when viewed from above (Z-axis direction plus side), but the position of the second engagement portion in the Z-axis direction and The lengths are different (the dotted line in the thermistor 50b in FIG. 13B indicates the root of the second engaging portion 52b (the outer periphery of the cylindrical column portion)). Moreover, the holding member 30 has the 1st engaging part 33b which is the protrusion part which protruded inward in the position of the said recessed part of the thermistor 50b.

  That is, the thermistor 50b is formed with a recess at the position of the protrusion formed in the thermistor 50a in the first modification, and the holding member 30 is protruded at the position of the recess formed in the holding member 30 in the first modification. Is formed. Thus, the thermistor 50b and the holding member 30 have a configuration in which the relationship between the protruding portions and the recessed portions of the thermistor 50a and the holding member 30 in the first modification is reversed.

  Here, the opening 31a formed in the thermistor insertion portion 31 has a shape larger than the outer shape of the second engagement portion 52b from the outer surface of the holding member 30 to the position where the second engagement portion 52b is disposed. have. Specifically, the opening 31a has a shape corresponding to the outer shape of the second engagement portion 52b from the outer surface 31b to the inner surface 31c of the thermistor insertion portion 31.

  Thereby, the thermistor 50b can be inserted into the opening 31a of the holding member 30, and the second engaging portion 52b can be engaged with the first engaging portion 33b by rotating after inserting the thermistor 50b. . Further, the thermistor 50b can be biased toward the power storage element 100 by configuring the path from the opening 31a to the first engagement portion 33b in the holding member 30 in the same manner as in the above embodiment.

  As described above, according to the power storage device according to the second modification of the embodiment of the present invention, the same effects as those in the above embodiment can be obtained. In particular, if the concave portion is formed in the thermistor 50b, the second engaging portion 52b can be formed. Therefore, a shape that is easy to produce can be adopted, and the productivity of the power storage device can be improved.

  The power storage device according to the embodiment of the present invention and the modification thereof has been described above, but the present invention is not limited to the above-described embodiment and the modification. In other words, it should be considered that the embodiment and its modification disclosed this time are illustrative and not restrictive in all respects. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims. In addition, embodiments constructed by arbitrarily combining the constituent elements included in the above-described embodiment and its modifications are also included in the scope of the present invention.

  For example, in the embodiment and the modification thereof, the power storage device includes the thermistor, and the thermistor is fixed to the power storage element 100 by being attached to the holding member 30. However, the power storage device includes a temperature sensor other than a thermistor such as a platinum resistance thermometer, or a sensor other than a temperature sensor such as a sensor that detects voltage or current, and the sensor is held by the same configuration and method as the thermistor. It may be attached to the member 30.

  Moreover, in the said embodiment and its modification, the holding member 30 decided to hold | maintain the bus bars 41 and 42. FIG. However, the holding member 30 may not have a function of holding the bus bars 41 and 42, or may have a function of holding members other than the bus bars 41 and 42.

  Moreover, in the said embodiment and its modification, the 2nd engaging part of the thermistor decided to be arrange | positioned in the position which rotated the shape of the opening part 31a of the holding member 30. FIG. That is, the second engagement portion is rotated and engaged with the first engagement portion of the holding member 30. However, a configuration in which the second engagement portion is slid in one direction and engaged with the first engagement portion may be employed.

  Moreover, in the said embodiment and its modification, suppose that the opening part 31a of the holding member 30 had a shape corresponding to the external shape of the 2nd engagement part of a thermistor. However, the opening part 31a should just be a shape larger than the external shape of a 2nd engaging part.

  Moreover, in the said embodiment and its modification, the holding member 30 decided to have the urging | biasing part 32 of the structure demonstrated in FIG. 7, for example. However, the configuration of the urging unit 32 is not limited to the configuration shown in FIG. 7 as long as the thermistor is urged toward the power storage element 100. For example, the urging portion 32 may be formed of an elastic member such as a spring or a leaf spring, or may be formed of an elastic material such as rubber.

  Moreover, in the said embodiment and its modification, although the holding member 30 decided to have the biasing part 32 which biases the thermistor toward the electrical storage element 100, a thermistor has a biasing part. The thermistor may be urged toward the power storage element 100 by the urging unit.

  Moreover, in the said embodiment and its modification, although the 1st engaging part of the holding member 30 decided to be a recessed part, a 1st engaging part may be a planar site | part.

  In the above embodiment and its modification, the guide portion 34 of the holding member 30 has an inclined surface. However, the guide portion 34 may have a stepped shape instead of the inclined surface. It doesn't matter.

  In addition, the present invention can be realized not only as such a power storage device but also as a sensor such as a thermistor and a holding member 30 provided in the power storage device.

  The present invention can be applied to a power storage device including a power storage element and a sensor attached to the power storage element.

DESCRIPTION OF SYMBOLS 1 Power storage device 10 Exterior body 11 First exterior body 12 Second exterior body 13 Positive electrode external terminal 14 Negative electrode external terminal 20 Power storage unit 30 Holding member 30a Upper surface 30b Lower surface 31 Thermistor insertion portion 31a Opening portion 31b Outer surface 31c Inner surface 32 Energizing portion 33 33a, 33b First engagement portion 34 Guide portion 41, 42 Bus bar 50, 50a, 50b Thermistor 51 Column portion 52, 52a, 52b Second engagement portion 53 Lead wire 100 Power storage element 110 Container 120 Positive electrode terminal 130 Negative electrode terminal 200 Bus bar 300, 310, 320 Spacer 400 Holding member 500 Restraining member 600 Bus bar frame 610 Opening for bus bar 620 Opening for thermistor 700 Heat shield plate

Claims (7)

A storage element;
A sensor attached to the electricity storage element;
A holding member for holding the sensor,
The holding member has an opening into which the sensor is inserted, and a first engagement portion that engages with the sensor,
The sensor has a second engagement portion that engages with the first engagement portion between the first engagement portion and the power storage element,
The opening has a shape that is larger than the outer shape of the second engagement portion from the outer surface of the holding member to a position where the second engagement portion is disposed. The opening has a shape corresponding to the outer shape of the second engaging portion from the outer surface of the holding member to a position where the second engaging portion is disposed.
The power storage device according to claim 1, wherein the second engagement portion is disposed at a position where the shape of the opening is rotated around a central axis of the sensor. The power storage device according to claim 1, wherein at least one of the sensor and the holding member includes a biasing unit that biases the sensor toward the power storage element. The power storage device according to any one of claims 1 to 3, wherein the first engagement portion is a recess formed on a surface of the holding member on the power storage element side. The holding member further includes a guide portion that guides the second engagement portion from the opening to the first engagement portion.
The said guide part is a recessed part formed between the said 1st engaging part and the said opening part of the surface at the said electrical storage element side of the said holding member, and was connected with the said opening part. The power storage device according to any one of the above. The power storage device according to claim 5, wherein the guide portion has an inclined surface that is inclined with respect to an end surface of the holding member on the power storage element side. A method of manufacturing a power storage device comprising: a power storage element; a sensor attached to the power storage element; and a holding member that holds the sensor.
Inserting the second engaging portion of the sensor along the opening of the holding member having a shape larger than the outer shape of the second engaging portion after attaching the holding member to the power storage element Process,
A method of manufacturing a power storage device comprising: an engagement step of engaging the second engagement portion with the first engagement portion between the first engagement portion of the holding member and the power storage element.

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