JP2017016886A - Power storage device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power storage device which inhibits influence of power storage elements on a substrate.SOLUTION: A power storage device 1 includes: power storage elements 40; an exterior body 10; a measurement substrate 81 connected to the power storage elements 40 and through which a first electric current flows; and a main circuit board 82 through which a second electric current larger than the first electric current flows. The main circuit board 82 is disposed facing positions of containers 410 of the power storage elements 40 which are different from long side surfaces 411.SELECTED DRAWING: Figure 9

Description

  The present invention relates to a power storage device including a power storage element and an exterior body.

  2. Description of the Related Art Conventionally, in a power storage device including a power storage element, a configuration including two substrates is known (see, for example, Patent Document 1).

JP 2003-331800 A

  However, the conventional power storage device has a problem that the substrate may be affected by the power storage element. That is, the power storage element included in the power storage device generates heat, but the conventional power storage device includes two substrates. Therefore, if the two substrates are not properly disposed, the heat from the power storage element is generated. There is a risk of affecting the substrate.

  The present invention has been made to solve the above-described problem, and an object thereof is to provide a power storage device that can suppress the influence of a power storage element on a substrate.

  To achieve the above object, a power storage device according to one embodiment of the present invention is a power storage device including a power storage element and an exterior body, and is connected to the power storage element, and a first substrate through which a first current flows is provided. And a second substrate through which a second current larger than the first current flows, and the second substrate is disposed to face a position different from the long side surface of the container of the electricity storage element.

  According to this, the power storage device includes the first substrate and the second substrate, and the second substrate through which a larger current flows than the first substrate faces a position different from the long side surface of the container of the power storage element. Arranged. That is, since the electricity storage element generally generates a lot of heat from the long side surface of the container, a second substrate that easily generates heat due to a large current flows on the side different from the long side surface, Further generation of heat due to heat from the storage element is suppressed. In this manner, by arranging the substrate in consideration of the influence of the heat from the power storage element, the influence of the power storage element on the substrate can be suppressed.

  The first substrate may be disposed to face the long side surface of the container of the electricity storage element.

  According to this, in the power storage device, the first substrate is disposed to face the long side surface of the container of the power storage element. That is, the first substrate that generates a small amount of heat and that does not easily generate heat is disposed on the long side surface. In this manner, by arranging the substrate in consideration of the influence of the heat from the power storage element, the influence of the power storage element on the substrate can be suppressed.

  Further, the second substrate may be arranged to face the short side surface of the container of the electricity storage element.

  According to this, in the power storage device, the second substrate is disposed to face the short side surface of the container of the power storage element. That is, the first substrate is disposed on the long side surface of the container of the power storage element, and the second substrate is disposed on the short side surface of the container of the power storage element. Thereby, since the two substrates can be arranged by utilizing the dead space on the long side surface and the short side surface of the container of the power storage element, the power storage device can be downsized.

  The first substrate is disposed along the inner surface of the first wall of the exterior body, and the second substrate is disposed along the inner surface of the second wall adjacent to the first wall of the exterior body. You may decide.

  According to this, two board | substrates are arrange | positioned along the inner surface of two adjacent walls of an exterior body. Thus, the power storage element can be brought close to the corner in the exterior body, and two substrates can be arranged using the vacant space, so that the power storage device can be downsized. Further, since the distance between the two substrates can be shortened, the two substrates can be easily connected at low cost, for example, by directly connecting the two substrates with a board-to-board connector.

  Further, at least one of the first substrate and the second substrate may be fixed to an inner wall surface of the exterior body.

  According to this, since at least one of the two substrates is fixed to the inner wall surface of the exterior body, it is disposed away from the power storage element. For this reason, it can suppress that the heat | fever from an electrical storage element is transmitted to a board | substrate, and has an influence on the said board | substrate, and can also suppress that noise generate | occur | produces in the circuit in a board | substrate with the electric current which flows from an electrical storage element. it can. Thereby, according to the said electrical storage apparatus, the influence on the board | substrate by an electrical storage element can be suppressed.

  The exterior body may have a restricting portion for restricting movement of at least one of the first substrate and the second substrate in a direction along the bottom wall on an inner surface of the bottom wall.

  According to this, in the power storage device, movement of at least one of the two substrates in the direction along the bottom wall is restricted by the restriction portion on the inner surface of the bottom wall of the exterior body. That is, since the substrate can be positioned at the end of the substrate on the bottom wall side, the substrate can be easily fixed to the exterior body.

  ADVANTAGE OF THE INVENTION According to this invention, the electrical storage apparatus which can suppress the influence on the board | substrate by an electrical storage element can be provided.

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 perspective view which shows the structure of the electrical storage element which concerns on embodiment of this invention. It is a perspective view which shows the structure of the measurement board | substrate and main circuit board which concern on embodiment of this invention. It is a perspective view which shows the structure of the exterior body main body which concerns on embodiment of this invention, and a front wall part. It is a perspective view which shows the structure by which a measurement board | substrate and a main circuit board are fixed to the exterior body main body and front wall part which concern on embodiment of this invention. It is sectional drawing which shows the structure by which a main circuit board is fixed to the exterior body main body which concerns on embodiment of this invention. It is a perspective view which shows the state by which the measurement board | substrate and main circuit board which concern on embodiment of this invention are arrange | positioned in the exterior body. It is a perspective view which omits the terminal side arrangement | positioning member and shows the state by which the measurement board | substrate and main circuit board which concern on embodiment of this invention are arrange | positioned in the exterior body. It is a top view which abbreviate | omits a terminal side arrangement | positioning member and shows the state by which the measurement board | substrate and main circuit board which concern on embodiment of this invention are arrange | positioned in the exterior body.

  Hereinafter, a power storage device according to an embodiment of the present invention will be described with reference to the drawings. The embodiment described below shows a 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 according to the following embodiments, constituent elements that are not described in the independent claims indicating the highest concept are described as optional constituent elements. Moreover, each figure is a figure for description of an electrical storage apparatus, and does not necessarily show exactly | strictly.

(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. For example, the X axis direction may be 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. Among these, the power storage device 1 according to the present embodiment is suitably used as a stationary power supply device.

  First, as shown in FIG. 1, the power storage device 1 includes an exterior body 10 including an exterior body main body 100, a front wall portion 200, and an upper wall portion 300. As shown in FIG. 2, the power storage device 1 includes a bottom surface side arrangement member 20, a power storage element 40, a terminal side arrangement member 50, a bus bar 60, a wiring board 70, and the inside of the exterior body 10. A measurement board 81 and a main circuit board 82 are provided.

  The exterior body 10 is a rectangular (box-shaped) container (module case) that constitutes the exterior body of the power storage device 1. The exterior body 10 arranges the power storage element 40 and the board (the wiring board 70, the measurement board 81, and the main circuit board 82) and the like at predetermined positions, and protects the power storage element 40 and the board from an impact or the like. The exterior body 10 is made of a highly rigid material such as a metal such as aluminum or iron. The package 10 may be made of a resin material such as polypropylene (PP), polycarbonate (PC), polybutylene terephthalate (PBT), or ABS resin.

  Here, the exterior body 10 includes an exterior body main body 100, a front wall portion 200, and an upper wall portion 300. The exterior body main body 100 is a member constituting the body of the exterior body 10, and includes a rectangular bottom wall and three rectangular side walls erected from the bottom wall. The exterior body main body 100 has a shape obtained by bending a plate-like member. The front wall portion 200 is a rectangular and plate-like member that forms another side wall of the exterior body 10. That is, the exterior body main body 100 and the front wall portion 200 form a bottomed rectangular cylindrical member. The details of the configuration of the exterior body main body 100 and the front wall portion 200 will be described later.

  The upper wall portion 300 is a member that constitutes the upper wall (lid) of the exterior body 10, and is a rectangular and plate-like shape that closes the opening of the bottomed rectangular cylindrical member formed of the exterior body main body 100 and the front wall portion 200. It is a member. That is, in a state where the storage element 40, the substrate (the wiring substrate 70, the measurement substrate 81, and the main circuit substrate 82) are disposed inside the exterior body main body 100 and the front wall portion 200, the opening portion is the upper wall portion. It is closed at 300.

  The bottom surface arrangement member 20 is a flat rectangular member disposed on the bottom surface side of the electricity storage element 40 and supports the electricity storage element 40 from below. That is, the bottom surface side arrangement member 20 is placed on the bottom wall of the exterior body main body 100 and attached and fixed to the bottom wall, and supports the power storage element 40 with respect to the exterior body 10 at a predetermined position.

  Specifically, the bottom surface side arrangement member 20 is made of an insulating material, and the power storage element 40 is inserted into a recess formed on the top surface to fix the power storage element 40 in the exterior body 10. In this way, the bottom surface side arrangement member 20 prevents the power storage element 40 from coming into contact with a conductive member such as the outer package 10 and protects the power storage element 40 and the like from vibration and impact.

  The bottom-surface-side arrangement member 20 may be formed of any insulating material, but for example, polybutylene terephthalate (GF reinforced PBT) reinforced with glass fiber, polyphenylene sulfide (PPS), or the like. It is preferably formed of a resin having high heat resistance. Thereby, even when the power storage element 40 generates heat, it is possible to suppress the bottom surface side arrangement member 20 from being damaged and affecting other power storage elements 40. In addition, as long as the insulation of the electrical storage element 40 can be ensured, the bottom face side arrangement | positioning member 20 does not need to be formed with an insulating material.

  The storage element 40 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. . In the present embodiment, 13 power storage elements 40 are accommodated in the outer package 10, but another power storage element 40 is added to the vacant space to accommodate 14 power storage elements 40. But it doesn't matter. Alternatively, the number of power storage elements 40 may be a plurality other than the above, or a configuration in which only one power storage element 40 is accommodated. Moreover, the electrical storage element 40 is not limited to a non-aqueous electrolyte secondary battery, and may be a secondary battery other than the non-aqueous electrolyte secondary battery or a capacitor. Details of the configuration of the storage element 40 will be described later.

  The terminal side arrangement | positioning member 50 is a flat rectangular member arrange | positioned at the electrode terminal side of the electrical storage element 40, and supports the electrical storage element 40 from upper direction. That is, the terminal side arrangement member 50 is arranged above the electricity storage element 40, and the electricity storage element 40 is sandwiched from both the upper and lower sides (Z-axis direction) together with the bottom surface side arrangement member 20, thereby Is supported at a predetermined position.

  Specifically, the terminal-side arrangement member 50 is made of an insulating material, and the power storage element 40 is inserted into a recess formed on the lower surface to fix the power storage element 40 in the exterior body 10. In this way, the terminal-side arrangement member 50 prevents the power storage element 40 from coming into contact with a conductive member such as the exterior body 10 and protects the power storage element 40 and the like from vibration and impact.

  The bus bar 60 and the wiring board 70 are placed on the terminal side arrangement member 50. That is, the terminal-side arrangement member 50 also has a positioning function with respect to the power storage element 40 when the bus bar 60 and the wiring board 70 are attached to the power storage element 40. The terminal-side arrangement member 50 may be formed of any insulating material, but is formed of a resin such as polypropylene (PP), polycarbonate (PC), or ABS resin from the viewpoint of cost. It is preferable. Note that the terminal-side arrangement member 50 may not be formed of an insulating material as long as the insulating properties of the power storage element 40, the bus bar 60, and the like can be ensured.

  The bus bar 60 is a conductive plate-like member such as a metal that is arranged above the terminal-side arrangement member 50 and electrically connects the plurality of power storage elements 40 to each other. Specifically, the bus bar 60 connects the positive terminal or the negative terminal of one power storage element 40 and the negative terminal or the positive terminal of another power storage element 40 in the adjacent power storage element 40. In the present embodiment, bus bar 60 connects 13 power storage elements 40 in series.

  The wiring board 70 is disposed above the terminal side arrangement member 50. In addition, in order to detect the voltage of the power storage element 40, the wiring board 70 is connected to the electrode terminals of at least one power storage element 40 of the power storage elements 40 included in the power storage device 1 (in this embodiment, all the power storage elements 40). A positive electrode terminal) of which one end is connected. In addition, the wiring board 70 has a rectangular shape and is disposed between the positive electrode terminal and the negative electrode terminal of the power storage element 40. In the present embodiment, two wiring boards 70 are arranged, but the number of wiring boards 70 is not limited. In addition, a harness or the like can be used instead of the wiring board 70. However, by connecting the electrode terminal and the measurement board 81 using the wiring board 70, the wiring can be easily routed and the assembling property is improved. . The wiring board 70 may have a configuration in which a thermistor is mounted and the temperature of the power storage element 40 can be detected.

  The measurement board 81 and the main circuit board 82 are disposed between the power storage element 40 and the side wall of the exterior body 10 and connected to at least one power storage element 40 of the power storage elements 40 included in the power storage device 1. It is a substrate that measures and controls the state of the storage element 40. Specifically, the main circuit board 82 is a board on which main circuit components through which a large current flows is mounted, and is fixed to the inner surface of the side wall of the exterior body 10 that faces the short side surface of the container of the storage element 40. The measurement substrate 81 is a substrate on which peripheral circuit components through which a small current flows is mounted, and is fixed to the inner surface of the side wall of the exterior body 10 facing the long side surface of the container of the power storage element 40. Details of the configurations and arrangement positions of the measurement board 81 and the main circuit board 82 will be described later.

  Next, the configuration of the storage element 40 will be described in detail.

  FIG. 3 is a perspective view showing a configuration of power storage element 40 according to the embodiment of the present invention.

  As shown in the figure, the storage element 40 includes a container 410, a positive terminal 430, and a negative terminal 440, and the container 410 includes a container lid 420.

  The container 410 includes a casing main body having a rectangular cylindrical shape made of metal and having a bottom, and a metal container lid 420 that closes an opening of the casing main body. In addition, the container 410 can be hermetically sealed by, for example, welding the container lid 420 and the housing body after accommodating the electrode body and the like inside. As described above, the container 410 is a rectangular parallelepiped container having the long side surfaces 411 on the side surfaces on both sides in the Y-axis direction and the short side surfaces 412 on the side surfaces on both sides in the X-axis direction. The material of the container 410 is not particularly limited, but is preferably a weldable metal such as stainless steel or aluminum. Moreover, although an electrode body etc. are arrange | positioned inside the container 410, detailed description is abbreviate | omitted.

  Next, the configuration of the measurement board 81 and the main circuit board 82 will be described in detail.

  FIG. 4 is a perspective view showing configurations of the measurement board 81 and the main circuit board 82 according to the embodiment of the present invention.

  The measurement substrate 81 is a rectangular and flat substrate on which a circuit that is connected to the power storage element 40 and measures the voltage of the power storage element 40 or communicates with the outside of the power storage device 1 is mounted. The measurement board 81 is connected to the wiring board 70 and measures the voltage of the power storage element 40, or is connected to another power storage device 1 or an external control device to exchange information with the outside. That is, the measurement board 81 is a board on which peripheral circuit components are mounted, and is a board (first board) through which a relatively small current (also referred to as a small current or a first current) flows.

  The main circuit board 82 is a rectangular and flat board on which main circuit components that are connected to the storage element 40 and through which the charge / discharge current of the storage element 40 flows are mounted. For example, the main circuit board 82 adjusts or cuts off the energization current for charging and discharging the storage element 40. That is, the main circuit board 82 is a board located on a large current path, and is a board (second board) through which a current (also referred to as a large current or a second current) larger than the first current flows.

  Here, as shown in the figure, the measurement board 81 has three fixing openings 81a formed at the upper end, and a communication connector 81b and the like are arranged on the lower surface in the Y axis direction minus side. Yes. In addition, connectors 81c connected to the wiring board 70 are disposed on the upper part and the side part (the end part on the plus side in the X-axis direction) of the measurement board 81, respectively. The fixing opening 81a is a circular through hole in the present embodiment, but may be a notch or the like, and the number of the fixing opening 81a is not limited to three. In addition to the connector 81b, the measurement board 81 has components mounted on the surface on the minus side in the Y-axis direction, but illustration and description thereof are omitted.

  The main circuit board 82 has three fixing openings 82a formed at the upper end. The fixing opening 82a is a circular through hole in the present embodiment, but may be a notch or the like, and the number of the fixing opening 82a is not limited to three. Further, the main circuit board 82 has a main circuit component such as a CPU mounted on the surface on the plus side in the X-axis direction, but illustration and description thereof are omitted. Since the substrate body can be arranged away from the storage element 40, it is preferable to mount the main circuit component on the X axis direction plus side surface, but the main circuit component is mounted on the X axis direction minus side surface. It doesn't matter.

  The measurement board 81 and the main circuit board 82 are directly connected by a board-to-board connector 83. That is, the Y-axis direction plus side surface of the board-to-board connector 83 and the Y-axis direction minus side surface of the measurement board 81 are connected, and the X-axis direction minus side surface of the board-to-board connector 83 is connected to the main circuit. The surface of the substrate 82 on the plus side in the X-axis direction is connected. Thereby, the measurement board 81 and the main circuit board 82 are connected in an L shape.

  In this way, since the measurement board 81 and the main circuit board 82 are connected by the board-to-board connector 83, a connection harness between the boards becomes unnecessary, so that the cost can be reduced. Note that the measurement board 81 and the main circuit board 82 may be connected not by the board-to-board connector 83 but by a connection harness.

  Next, the structure of the exterior body main body 100 and the front wall part 200 is demonstrated in detail.

  FIG. 5 is a perspective view showing configurations of the exterior body main body 100 and the front wall portion 200 according to the embodiment of the present invention.

  As shown in the figure, the exterior body main body 100 includes a bottom wall 110 and side walls 120 to 140. Further, the inner surface (the surface on the plus side in the Z-axis direction) of the bottom wall 110 is provided with a regulating portion 150 (the regulating portions 151 and 152), and the inner surface (the surface on the plus side in the X-axis direction) of the side wall 120 is provided. The fixing part 160 is provided. The front wall portion 200 includes a side wall 210, and a fixing portion 220 is provided on the inner surface of the side wall 210 (the surface on the Y axis direction plus side). In addition, external connection terminals 230 are provided on the side wall 210, and a plurality of connector openings 250 are formed.

  The bottom wall 110 is a wall (a wall on the negative side in the Z-axis direction) disposed at the bottom of the exterior body main body 100, and has a rectangular shape and a flat plate shape. The side wall 120 is a wall disposed on the side of the exterior body 100 that is erected upward from the edge on the negative side in the X-axis direction of the bottom wall 110 (on the positive side in the Z-axis direction). And it has a flat plate shape. The side wall 130 is a wall disposed on the side portion of the exterior body main body 100 that is erected upward from the edge on the plus side in the X-axis direction of the bottom wall 110 and has a rectangular shape and a flat plate shape. Yes. The side wall 140 is a wall disposed on the side of the exterior body 100 that is erected upward from the edge on the Y axis direction plus side of the bottom wall 110 and has a rectangular shape and a flat plate shape. Yes.

  The restriction part 150 is a long member provided along the inner surface of the bottom wall 110, and in this embodiment, four restriction parts 150 (two restriction parts 151 and two restriction parts 152) are provided. It has been. Specifically, the two restricting portions 151 are long members extending along the inner surface of the bottom wall 110 and the inner surface of the side wall 210, and the two restricting portions 152 are formed on the inner surface of the bottom wall 110 and the side wall 120. It is a long member extending along the inner surface.

  Here, as shown in the figure, the restricting portion 150 includes a base portion 150a, protruding portions 150b and 150c protruding upward (Z-axis direction plus side) from the base portion 150a, and a support portion 150d that supports the base portion 150a. Have. The support portion 150d is a cylindrical portion disposed below the base portion 150a, and the base portion 150a is placed on the two support portions 150d and extends in a long shape along the inner surface of the bottom wall 110. . The protrusion 150b and the protrusion 150c extend in parallel along the outer edge of the base 150a, and a recess is formed between the protrusion 150b and the protrusion 150c. The number and shape of the support portions 150d are not limited to the above.

  The measurement board 81 or the main circuit board 82 is inserted into the recess formed between the protrusion 150b and the protrusion 150c. That is, the concave portion is a concave portion into which the measurement board 81 or the main circuit board 82 is removably inserted toward the bottom wall 110.

  The fixing portion 160 is a portion that is provided on the inner surface of the side wall 120 and fixes the end portion of the main circuit board 82. Specifically, the fixing portion 160 is a columnar portion that protrudes from the upper surface of the inner surface of the side wall 120 and fixes the upper end portion of the main circuit board 82 to the side wall 120 by screwing or the like.

  Further, the fixing portion 220 provided on the inner surface of the side wall 210 of the front wall portion 200 is a portion for fixing the end portion of the measurement substrate 81. Specifically, the fixing portion 220 is a cylindrical portion that protrudes from the upper surface of the inner surface of the side wall 210 and fixes the upper end portion of the measurement substrate 81 to the side wall 210 by screwing or the like.

  In the present embodiment, two restricting portions 151 and 152 are provided, but one restricting portion 151 or 152 may be provided, or three or more restricting portions 151 or 152 may be provided. The fixing unit 160 may be configured to fix the side end (end in the Y-axis direction) of the main circuit board 82 instead of the upper end of the main circuit board 82, and the fixing unit 220 may be configured to fix the upper end of the measurement board 81. The structure which fixes not the part but the side edge part (edge part of a X-axis direction) of the measurement board | substrate 81 may be sufficient. In this embodiment, three fixing parts 160 and 220 are provided, but one or two fixing parts 160 or 220 may be provided, or four or more fixing parts may be provided. .

  Further, a configuration in which either one of the restricting portions 151 and 152 is not provided may be used. In other words, it is only necessary to provide a restriction unit 150 that restricts movement of at least one of the measurement board 81 and the main circuit board 82. Similarly, a configuration in which either one of the fixing portions 160 and 220 is not provided may be used. That is, it is only necessary to provide a fixing portion that fixes at least one of the measurement board 81 and the main circuit board 82 to the inner wall surface of the exterior body 10.

  The external connection terminal 230 is an external terminal through which the power storage device 1 charges electricity from the outside and discharges electricity to the outside, and is connected to a conductive member outside the power storage device 1. That is, the power storage device 1 charges electricity from the outside via the external connection terminal 230 and discharges electricity to the outside. The external connection terminal 230 includes a positive-side external terminal and a negative-side external terminal, but detailed description thereof is omitted.

  The connector opening 250 is a rectangular opening formed in the lower portion of the side wall 210, and a connector 81b and the like disposed on the measurement board 81 are inserted therein. That is, the wiring can be connected to the measurement board 81 from the outside through the connector opening 250.

  Note that a handle may be provided on the outer surface of the side wall 210 of the front wall portion 200. Thereby, removal or movement (carrying) of the power storage device 1 can be easily performed.

  Next, a configuration in which the measurement board 81 and the main circuit board 82 are fixed to the exterior body main body 100 and the front wall part 200 will be described in detail.

  FIG. 6 is a perspective view showing a configuration in which the measurement board 81 and the main circuit board 82 are fixed to the exterior body main body 100 and the front wall portion 200 according to the embodiment of the present invention. In addition, the bottom surface side arrangement member 20, the power storage element 40, the terminal side arrangement member 50, and the like are arranged inside the exterior body main body 100 and the front wall portion 200, but these are omitted for convenience of explanation. Are shown.

  Moreover, FIG. 7 is sectional drawing which shows the structure by which the main circuit board 82 is fixed to the exterior body main body 100 which concerns on embodiment of this invention. Specifically, FIG. 7 is a cross-sectional view of the configuration shown in FIG. 6 taken along the line VII-VII, and FIG. 7A is a cross-sectional view showing the configuration of the exterior body main body 100. 7B is a cross-sectional view in a state where the main circuit board 82 is disposed on the exterior body main body 100, and FIG. 7C is a state in which the main circuit board 82 is fixed to the exterior body main body 100. FIG.

  First, as shown in FIGS. 6 and 7A and 7B, the main circuit board 82 is formed in the recess formed between the protruding portion 150 b and the protruding portion 150 c of the restricting portion 152 of the exterior body main body 100. The lower end (the end on the negative side in the Z-axis direction) is inserted. Here, the concave portion is a portion surrounded by the base portion 150a, the protruding portion 150b, and the protruding portion 150c, and the main circuit board 82 is inserted into the concave portion until the end surface of the lower end portion contacts the upper surface of the base portion 150a. Is done.

  Thereby, in the direction along the bottom wall 110, the restricting portion 152 restricts the movement of the main circuit board 82. Specifically, the restricting portion 152 abuts the main circuit board 82 in the direction toward the bottom wall 110 (Z-axis direction minus side) and in the direction along the bottom wall 110 (X-axis direction). The movement of the substrate 82 is restricted.

  That is, the restricting portion 152 restricts the movement of the main circuit board 82 in the direction toward the bottom wall 110 by the base portion 150 a coming into contact with the end surface of the lower end portion of the main circuit board 82. In addition, the restricting portion 152 is in a direction along the bottom wall 110 of the main circuit board 82, that is, on the side wall 120 side (X-axis direction minus side) by the protrusion 150 b coming into contact with the side surface of the lower end portion of the main circuit board 82. Restrict movement to In addition, the restricting portion 152 is in a direction along the bottom wall 110 of the main circuit board 82, that is, on the side wall 130 side (X-axis direction plus side) when the projecting portion 150 c contacts the side surface of the lower end portion of the main circuit board 82. Restrict movement to

  Similarly, with respect to the measurement substrate 81, the lower end portion of the measurement substrate 81 is inserted into the recess formed between the protruding portion 150b and the protruding portion 150c of the restricting portion 151. In the direction along the bottom wall 110, the restriction unit 151 restricts the movement of the measurement substrate 81. In other words, the restricting portion 151 is in contact with the measurement substrate 81 in the direction toward the bottom wall 110 (Z-axis direction minus side) and in the direction along the bottom wall 110 (Y-axis direction plus side and minus side). The movement of the substrate 81 is restricted.

  Then, as shown in FIG. 7C, the screw 170 is inserted into the fixing opening 82a of the main circuit board 82 and fixed to the female screw portion 160a of the fixing portion 160 by screwing. The main circuit board 82 is fixed to the portion 160. That is, the fixing portion 160 is provided on the inner surface of the side wall 120 at a position corresponding to the fixing opening 82 a at the upper end portion of the main circuit board 82, and the lower end portion of the main circuit board 82 is formed as a concave portion of the restriction portion 152. In the inserted state, the upper end portion of the main circuit board 82 is fixed to the fixing portion 160.

  Similarly, for the measurement substrate 81, the fixing portion 220 is provided on the inner surface of the side wall 210 at a position corresponding to the fixing opening 81 a at the upper end portion of the measurement substrate 81, and the lower end portion of the measurement substrate 81 is The upper end portion of the measurement substrate 81 is fixed to the fixing portion 220 while being inserted into the concave portion of the restricting portion 151.

  As described above, the main circuit board 82 is fixed to the inner surface of the side wall 120 by the restriction portion 152 and the fixing portion 160, and the measurement board 81 is fixed to the inner surface of the side wall 210 by the restriction portion 151 and the fixing portion 220. Fixed.

  Next, the arrangement positions of the measurement board 81 and the main circuit board 82 in the exterior body 10 will be described in detail.

  FIG. 8 is a perspective view showing a state in which the measurement board 81 and the main circuit board 82 according to the embodiment of the present invention are arranged in the exterior body 10. Specifically, FIG. 4 is a perspective view showing a state where the upper wall portion 300 is removed from the power storage device 1 shown in FIG.

  FIG. 9 is a perspective view showing a state in which the measurement board 81 and the main circuit board 82 according to the embodiment of the present invention are arranged in the exterior body 10 with the terminal side arrangement member 50 omitted. That is, this figure is a perspective view showing a configuration when the terminal side arrangement member 50 is omitted from the state shown in FIG. In addition, although the terminal side arrangement | positioning member 50 is not actually abbreviate | omitted, in FIG.

  FIG. 10 is a plan view showing the state in which the measurement board 81 and the main circuit board 82 according to the embodiment of the present invention are arranged in the exterior body 10, omitting the terminal side arrangement member 50. That is, this figure is a top view showing a configuration when the state shown in FIG. 9 is viewed from the positive side in the Z-axis direction.

  As shown in these drawings, the measurement board 81 and the main circuit board 82 are fixed to the inner wall surface of the exterior body 10. That is, the measurement board 81 and the main circuit board 82 are disposed along the inner surface of the side wall of the exterior body 10 and are fixed to the inner surface.

  Specifically, the measurement substrate 81 (first substrate) is disposed in parallel along the inner surface of the side wall 210 of the front wall portion 200 (disposed vertically or disposed perpendicular to the bottom wall 110). It is fixed to. The main circuit board 82 (second board) is arranged in parallel along the inner surface of the side wall 120 of the exterior body main body 100 (arranged vertically or perpendicular to the bottom wall 110) and fixed to the inner surface. Has been. Note that the measurement board 81 and the main circuit board 82 may be disposed substantially parallel to the inner surface.

  More specifically, the measurement substrate 81 is disposed to face the long side surface 411 of the container 410 of the storage element 40, and the main circuit substrate 82 is disposed to face a position different from the long side surface 411. That is, the main circuit board 82 is disposed to face the short side surface 412 of the container 410 of the power storage element 40.

  In other words, the measurement substrate 81 is disposed along the inner surface of the first wall of the exterior body 10, and the main circuit substrate 82 is disposed along the inner surface of the second wall adjacent to the first wall of the exterior body 10. ing. That is, the measurement board 81 and the main circuit board 82 are arranged (fixed) along the inner surfaces of two adjacent walls of the exterior body 10.

  As described above, the space is formed in an L shape on the negative side in the X-axis direction and the negative side in the Y-axis direction of the electricity storage device 40, and the measurement board is formed in an L shape in the L-shaped space. 81 and the main circuit board 82 are arranged. As described above, at least one of the measurement board 81 and the main circuit board 82 may be fixed to the inner wall surface of the exterior body 10.

  In addition, the measurement board 81 is connected to the power storage element 40 via the wiring board 70 and is connected to the main circuit board 82 and an external device. That is, the wiring board 70 is connected to the positive terminals 430 of the plurality of power storage elements 40 in the detection unit 71, and the measurement board 81 is connected to the wiring board 70 by the wiring 72 via the connector 81c. The measurement board 81 is connected to the main circuit board 82 by a board-to-board connector 83. The measurement board 81 is connected to an external device via the connector opening 250 and the connector 81b of the front wall part 200.

  The main circuit board 82 is connected to the power storage element 40, the external connection terminal 230, and the measurement board 81. That is, the first wiring 61 connects the positive external terminal of the external connection terminal 230 and the positive terminal 430 of the power storage element 40 at the end, and the bus bar 60 and the second wiring 62 connect the adjacent power storage elements 40. The negative terminal 440 and the positive terminal 430 are connected. Further, the negative terminal 440 of the power storage element 40 at the end and the main circuit board 82 are connected by the third wiring 63, and the main circuit board 82 and the external terminal on the negative side of the external connection terminal 230 are connected by the fourth wiring 64. And are connected.

  As described above, the power storage device 1 according to the embodiment of the present invention includes the measurement board 81 as the first board and the main circuit board 82 as the second board, and the first board stores the power. The second substrate that is disposed to face the long side surface 411 of the container 410 of the element 40 and through which a larger current flows than the first substrate is disposed to face a position different from the long side surface 411. That is, since the storage element 40 generally generates a large amount of heat from the long side surface 411 side of the container 410, a first substrate that has a small flowing current and hardly generates heat is disposed on the long side surface 411 side. On the different side, a second substrate that easily generates heat due to a large current flows is disposed, and the second substrate is prevented from further generating heat due to heat from the storage element 40. Thus, by arranging the first substrate and the second substrate in consideration of the influence of the heat from the storage element 40, the influence of the storage element 40 on the substrate can be suppressed.

  In the power storage device 1, the second substrate is disposed to face the short side surface 412 of the container 410 of the power storage element 40. That is, the first substrate is disposed on the long side 411 side of the container 410 of the power storage element 40, and the second substrate is disposed on the short side 412 side of the container 410 of the power storage element 40. Thereby, since the two substrates can be arranged by utilizing the dead space on the long side surface 411 side and the short side surface 412 side of the container 410 of the power storage element 40, the power storage device 1 can be downsized.

  The two substrates are arranged along the inner surfaces of two adjacent walls of the exterior body 10. As a result, the storage element 40 can be brought close to the corner in the exterior body 10, and two substrates can be arranged using the vacant space, so that the storage device 1 can be downsized. That is, in the present embodiment, since the L-shaped dead space is formed on the negative side in the X-axis direction and the negative side in the Y-axis direction of the storage element 40, the L-shaped dead space is formed in the L-shaped dead space. The measurement board 81 and the main circuit board 82 formed in the above can be arranged. As described above, the dead space inside the power storage device 1 can be effectively used to reduce the size of the power storage device 1. Further, since the distance between the two substrates can be shortened, the two substrates can be easily connected at low cost, such as by directly connecting the two substrates with the substrate-to-substrate connector 83.

  In addition, at least one of the two substrates is fixed to the inner wall surface of the exterior body 10, and thus is disposed away from the power storage element 40. For this reason, it can suppress that the heat | fever from the electrical storage element 40 is transmitted to a board | substrate, and has influence on the said board | substrate, and suppresses that noise generate | occur | produces in the circuit in a board | substrate with the electric current which flows from the electrical storage element 40. be able to. Thereby, according to the electrical storage apparatus 1, the influence on the board | substrate by the electrical storage element 40 can be suppressed.

  In addition, since the board is arranged along the inner surface of the side wall of the exterior body 10 so that the board is oriented in the vertical direction, for example, even when the power storage device 1 is used in a place with a lot of dust such as sand dust, Accumulation on top can be suppressed.

  Moreover, when attaching a board | substrate to the upper surface and bottom face of the exterior body 10, it is necessary to ensure the space which arrange | positions the said board | substrate to a height direction, but when attaching the said board | substrate to the side surface of the exterior body 10, it is electrical storage. The board | substrate can be arrange | positioned using the dead space of the side of the element 40. FIG. For this reason, in the power storage device 1, since the substrate is fixed to the inner surface of the side wall of the exterior body 10, the dead space on the side of the power storage element 40 can be effectively used to reduce the size of the power storage device 1. Can do.

  Further, in the power storage device 1, since the end portions of the substrate are fixed by the fixing portions 160 and 220 on the inner surfaces of the side walls 120 and 210 of the outer package 10, the substrate can be disposed without hindering the arrangement of the electronic components in the substrate. Can be securely fixed to the side wall.

  Further, in the power storage device 1, the restriction portion 150 on the inner surface of the bottom wall 110 of the exterior body 10 restricts movement of at least one of the two substrates in the direction along the bottom wall 110. That is, since the substrate can be positioned at the end of the substrate on the bottom wall 110 side, the substrate can be easily fixed to the exterior body 10.

  In addition, a recess is formed in the restricting portion 150, and the substrate is inserted into the recess so as to be freely inserted and removed. For this reason, since the control part 150 can be comprised by the simple shape of a recessed part, it can be produced easily. Further, since it is only necessary to insert the substrate into the recess, the substrate can be easily attached and can be easily removed. In particular, the substrate can be easily attached and detached while the power storage device 40 is housed in the power storage device 1.

  The power storage device according to the embodiment of the present invention has been described above, but the present invention is not limited to the above embodiment. That is, the embodiment disclosed this time should be considered as illustrative in all points and not restrictive. 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, an embodiment constructed by arbitrarily combining the constituent elements included in the above embodiment is also included in the scope of the present invention.

  For example, in the above-described embodiment, the measurement substrate 81 is fixed to the side wall 210 disposed to face the long side surface 411 of the container 410 of the power storage element 40. However, since the side wall 140 of the outer package 10 is also arranged to face the long side surface 411, the measurement substrate 81 may be fixed to the side wall 140.

  Further, in the above embodiment, the main circuit board 82 is fixed to the side wall 120 disposed to face the short side surface 412 of the container 410 of the power storage element 40. However, since the side wall 130 of the outer package 10 is also arranged to face the short side surface 412, the main circuit board 82 may be fixed to the side wall 130. Alternatively, the main circuit board 82 may be fixed to the upper wall portion 300 of the outer package 10 or the bottom wall 110 of the outer package body 100. That is, the main circuit board 82 only needs to be disposed to face a position different from the long side surface 411 of the container 410 of the power storage element 40.

  Moreover, in the said embodiment, although the control part 150 was provided in the bottom wall 110 of the exterior body 10, and the fixing parts 160 and 220 were provided in the side walls 120 and 210, the control part 150 and fixed The units 160 and 220 may be provided on any wall as long as the measurement board 81 and the main circuit board 82 can be attached to desired positions.

  Further, in the above embodiment, the restricting portion 150 is provided at a position where the movement is restricted by contacting the lower end portions of the measurement board 81 and the main circuit board 82, and the fixing portions 220 and 160 are provided on the measurement board 81 and the main circuit. It is provided at the upper end of the substrate 82. However, the positions of the restricting portion 150 and the fixing portions 220 and 160 are not particularly limited. That is, the restricting portion 150 may be provided at a position where the movement is restricted by contacting the upper end portion, the side end portion, or the central portion, instead of the lower end portions of the measurement board 81 and the main circuit board 82. In addition, the fixing portions 220 and 160 may be provided not at the upper end portions of the measurement board 81 and the main circuit board 82 but at positions for fixing the lower end portion, the side end portion, or the central portion.

  Further, in the above embodiment, the restriction unit 150 has a recess and restricts movement of the measurement board 81 and the main circuit board 82. However, the shape of the restricting portion 150 is not limited to the concave portion, and may be a protrusion that contacts the end portion of the measurement board 81 or the main circuit board 82. Alternatively, a configuration in which the restriction unit 150 is not provided may be used.

  In the above embodiment, the measurement board 81 and the main circuit board 82 are fixed to the inner wall surface of the exterior body 10, but these boards are members other than the exterior body 10 (for example, arranged on the bottom surface side). The member 20 or the terminal side arrangement member 50 may be fixed.

  In the above embodiment, the measurement board 81 and the main circuit board 82 are two boards arranged in an L shape, but may be formed integrally. For example, the measurement board 81 and the main circuit board 82 may be configured by a single board formed in an L shape, or may be configured by bending a single flexible board into an L shape. Absent.

  In the above embodiment, the wiring board 70 is arranged above the terminal-side arrangement member 50. However, the wiring board 70 also has an inner wall surface of the exterior body 10 such as the same position as the measurement board 81. It may be a configuration fixed to.

  The present invention can be applied to a power storage device in which two substrates are accommodated inside an exterior body.

DESCRIPTION OF SYMBOLS 1 Power storage device 10 Exterior body 20 Bottom surface side arrangement member 40 Power storage element 50 Terminal side arrangement member 60 Bus bar 61 First wiring 62 Second wiring 63 Third wiring 64 Fourth wiring 70 Wiring board 71 Detection part 72 Wiring 81 Measurement board 81a, 82a Fixing portion 81b, 81c Connector 82 Main circuit board 83 Board-to-board connector 100 Exterior body 110 Bottom wall 120, 130, 140 Side wall 150, 151, 152 Restriction part 150a Base part 150b, 150c Protrusion part 150d Support part 160 Fixed Part 160a female thread part 170 screw 200 front wall part 210 side wall 220 fixing part 230 external connection terminal 250 connector opening part 300 upper wall part 410 container 411 long side surface 412 short side surface 420 container lid part 430 positive electrode terminal 440 negative electrode terminal

Claims (6)

A power storage device including a power storage element and an exterior body,
A first substrate connected to the power storage element and through which a first current flows; and a second substrate through which a second current larger than the first current flows;
The power storage device, wherein the second substrate is disposed to face a position different from a long side surface of the container of the power storage element. The power storage device according to claim 1, wherein the first substrate is disposed to face a long side surface of the container of the power storage element. The power storage device according to claim 1, wherein the second substrate is disposed to face a short side surface of the container of the power storage element. The first substrate is disposed along the inner surface of the first wall of the exterior body,
The power storage device according to claim 1, wherein the second substrate is disposed along an inner surface of a second wall adjacent to the first wall of the exterior body. The power storage device according to any one of claims 1 to 4, wherein at least one of the first substrate and the second substrate is fixed to an inner wall surface of the exterior body. The said exterior body has a control part which controls a movement of at least one of said 1st board | substrate and said 2nd board | substrate in the direction along the said bottom wall in the inner surface of a bottom wall. The power storage device described in 1.

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