JP2018156933A - Power storage device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power storage device with high safety, which has a connector to which external wiring can be attached and detached.SOLUTION: A power storage device 10 includes a power storage element 20, first wiring 65a electrically connected to the power storage element 20, a harness plate 50 that holds the first wiring 65a, and a first connector 85 connected to the first wiring 65a, located at a central portion of the harness plate 50, and detachable from external wiring.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a power storage device including a power storage element and a wiring holding member that holds a wiring electrically connected to the power storage element.

  Conventionally, for example, there is a monitoring device that monitors the state of a power storage device including one or more power storage elements. For example, Patent Literature 1 discloses a battery monitoring device including a high voltage side connector electrically connected to a battery and a low voltage side connector connected to a host microcontroller. In this battery monitoring device, the high-voltage side connector and the low-voltage side connector are arranged on opposite sides of the housing in plan view.

Japanese Patent Laid-Open No. 2006-115647

  For example, a power storage device connected to an external device such as the battery monitoring device described above is also provided with a connector for connecting to external wiring. Since this connector is an electrical connection point between the power storage device and the external device, the power storage device is mounted on the mobile body for driving or starting a mobile body such as an electric vehicle (EV), for example. In some cases, it is necessary to devise measures to protect against impacts and the like. In particular, high safety is required for a connector that is electrically connected to a power storage element included in the power storage device.

  For this reason, when the connector electrically connected to the power storage element is disposed at the end of the housing (the exterior body of the power storage device), for example, as in the conventional battery monitoring device described above, the connector is susceptible to impact. Problems can arise.

  The present invention has been made by the inventors of the present application newly paying attention to the above-described problem, and provides a power storage device having a connector with a removable external wiring and having high safety. Objective.

  To achieve the above object, a power storage device according to one embodiment of the present invention includes a power storage element, a first wiring electrically connected to the power storage element, a wiring holding member that holds the first wiring, A first connector connected to the first wiring, the first connector being located in a central portion of the wiring holding member and having an external wiring removable.

  According to this configuration, the power storage device is provided with the first wiring electrically connected to the power storage element being held by the wiring holding member. Therefore, for example, at the time of manufacturing (assembling) the power storage device, the first wiring can be incorporated into the power storage device while being held by the wiring holding member. Thereby, for example, pinching between the members of the first wiring hardly occurs. For example, compared with the case where the freedom degree of movement of the 1st wiring is high, possibility of generating troubles, such as disconnection of the 1st wiring, is reduced. Furthermore, since the first connector is located at the center of the wiring holding member, the first connector that is in an energized state with the power storage element, for example, when a mobile object on which the power storage device is mounted has a collision accident The possibility of damage is reduced. That is, the occurrence of an unsafe event such as an external short circuit due to damage to the first connector is suppressed. As described above, the power storage device according to this aspect is a power storage device that includes a connector to which an external wiring can be attached and detached and has high safety.

  The power storage device according to one embodiment of the present invention further includes a second wiring that is a wiring for a voltage lower than the first wiring, the second wiring held by the wiring holding member, and the second wiring It is good also as providing the 2nd connector connected to wiring and located in the edge part of the said wiring holding member.

  According to this configuration, as described above, in the power storage device in which the possibility of damage to the first connector for high voltage is reduced, for example, when a collision accident occurs, Ease of attaching and detaching external wiring to the voltage second connector is ensured.

  Here, if an excessive external force is applied to the connector due to the collision of the moving body carrying the power storage device with the object or the external wiring being forcibly attached to or detached from the connector, Can cause damage. If the connector is damaged, the state of the power storage device cannot be correctly confirmed, or a safety problem such as the occurrence of an external short circuit may occur.

  Therefore, in the power storage device according to this aspect, for the first connector to which a relatively high voltage is applied, the possibility of damage in an emergency such as a collision accident is reduced, and the second connector to which a relatively low voltage is applied. Reduces the possibility of damage when attaching / detaching the external wiring (at least one of when attaching / detaching the external wiring). Thereby, a highly safe power storage device is obtained.

  In the power storage device according to one embodiment of the present invention, the wiring holding member intersects the first wiring and the second wiring with an arrangement direction of the power storage element and the wiring holding member in the first region. It is good also as having the control part which controls to the position located in a line with the direction.

  According to this configuration, for example, when the wiring holding member is disposed on the power storage element, the first wiring and the second wiring do not overlap each other at least in the first region. Is suppressed. Further, when a cover or the like covering the wiring holding member is disposed, the possibility of disconnection of the first wiring or the second wiring due to being pressed from the cover is reduced.

  The power storage device according to one embodiment of the present invention further includes a cover member that covers the wiring holding member from a side opposite to the power storage element, and the cover member includes a cover member at a position facing the first region. The lower surface part which forms the outer surface near the said wiring holding member rather than this part may be formed.

  According to this configuration, in the cover member, for example, the external wiring can be arranged or the electric device such as the control board can be arranged using a space formed by the low surface portion which is a recessed portion. That is, the space around the power storage device can be effectively used while ensuring the safety of the power storage device.

  In the power storage device according to one embodiment of the present invention, the first wiring and the second wiring may be arranged to bypass the second region on the opening side of the first connector.

  According to this configuration, the ease of attaching and detaching the external wiring is ensured also for the first connector arranged in the central portion of the wiring holding member. Therefore, the possibility of damage to the first connector when the external wiring is attached to or detached from the first connector is reduced.

  Further, in the power storage device according to one embodiment of the present invention, the wiring holding member may include a wall portion that is erected along at least a part of the periphery of the second region.

  According to this configuration, when the first wiring and the second wiring are arranged on the wiring holding member or after the arrangement, the first wiring and the second wiring are forcibly arranged in the second region due to the wall portion. Can be located outside. Therefore, for example, the ease of attaching / detaching the external wiring to / from the first connector is further ensured.

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

  ADVANTAGE OF THE INVENTION According to this invention, it is an electrical storage apparatus provided with the connector which can attach or detach external wiring, Comprising: An electrical storage apparatus with high safety | security can be provided.

It is a perspective view which shows the external appearance of the electrical storage apparatus which concerns on embodiment. It is the 1st disassembled perspective view which shows each component at the time of decomposing | disassembling the electrical storage apparatus which concerns on embodiment. It is the 2nd disassembled perspective view which shows each component at the time of decomposing | disassembling the electrical storage apparatus which concerns on embodiment. It is a top view which shows the layout of the 1st wiring which concerns on embodiment. It is a top view which shows the layout of the 2nd wiring which concerns on embodiment. It is a perspective view which expands and shows a part of harness plate which concerns on embodiment. It is a top view which shows the 1st structural example of the battery pack which concerns on embodiment. It is a top view which shows the 2nd structural example of the battery pack which concerns on embodiment. It is sectional drawing which shows the structure around the cover body of the electrical storage apparatus which concerns on the modification of embodiment. It is a top view which shows the structure of the electrical storage apparatus which concerns on the modification of embodiment.

  Hereinafter, a power storage device according to an embodiment of the present invention will be described with reference to the drawings. It should be noted that the embodiments described below show comprehensive or specific examples. 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.

  In the following description and drawings, the arrangement direction of the electrode terminals in one power storage element, the facing direction of the short side surface of the container of the power storage element, or the facing direction of the long side surface of the exterior body of the power storage device is defined as the X-axis direction. Define. Further, an arrangement direction of the plurality of power storage elements, a facing direction of the long side surface of the container of the power storage element, a thickness direction of the container, or a facing direction of the short side surface of the exterior body of the power storage device is defined as a Y-axis direction. Further, the direction in which the outer body body, the power storage element, the inner lid, the harness plate, and the lid body of the power storage device are aligned, the direction in which the container body and the lid body of the power storage element are aligned, or the vertical direction is defined as the Z-axis direction. These X-axis direction, Y-axis direction, and Z-axis direction are directions that intersect (orthogonal in this embodiment). Although the case where the Z-axis direction does not become the vertical direction may be considered depending on the usage mode, the Z-axis direction will be described below as the vertical direction for convenience of explanation. In the following description, for example, the X axis direction plus side indicates the arrow direction side of the X axis, and the X axis direction minus side indicates the opposite side to the X axis direction plus side. The same applies to the Y-axis direction and the Z-axis direction.

(Embodiment)
First, the configuration of power storage device 10 according to the embodiment will be described. FIG. 1 is a perspective view showing an external appearance of a power storage device 10 according to an embodiment. FIG. 2 is a first exploded perspective view showing each component when the power storage device 10 according to the embodiment is disassembled. FIG. 3 is a second exploded perspective view showing each component when the power storage device 10 according to the embodiment is disassembled. In FIG. 3, the exterior body 11 and the inner lid 30 are not shown in order to clearly illustrate the relationship between the harness plate 50 and the members fixed to the harness plate 50.

  The power storage device 10 is a device that can charge electricity from the outside and discharge electricity to the outside. For example, the power storage device 10 is a battery module used for power storage use, power supply use, and the like. Specifically, the power storage device 10 is, for example, an automobile such as an electric vehicle (EV), a hybrid electric vehicle (HEV), or a plug-in hybrid electric vehicle (PHEV), a motorcycle, a watercraft, a snowmobile, an agricultural machine, a construction It is used as a battery for driving a moving body such as a machine or starting an engine.

  As shown in FIGS. 1 and 2, the power storage device 10 includes an exterior body 11 including a lid body 100 and an exterior body body 200, a plurality of power storage elements 20 accommodated inside the exterior body 11, an inner lid 30, and a plurality. Bus bar 40, harness plate 50, internal wiring 65, and the like.

  The exterior body 11 is a rectangular (box-shaped) container (module case) that constitutes the exterior body of the power storage device 10. That is, the exterior body 11 is disposed outside the power storage element 20 and the harness plate 50 and the like, and the power storage element 20 and the like are disposed at predetermined positions to protect them from impact and the like. The exterior body 11 is made of an insulating material such as polycarbonate (PC), polypropylene (PP), polyethylene (PE), polyphenylene sulfide resin (PPS), polybutylene terephthalate (PBT), or ABS resin. Thus, the exterior body 11 avoids the storage element 20 and the like from coming into contact with a metal member or the like.

  The exterior body 11 includes a flat rectangular lid body 100 that constitutes a lid body (outer lid) of the exterior body 11 and an exterior body body 200 that constitutes the main body of the exterior body 11. The lid 100 is an example of a cover member that covers the harness plate 50 from the side opposite to the power storage element 20. The exterior body 200 is a bottomed rectangular cylindrical housing in which an opening is formed. That is, the lid body 100 is arranged so as to close the opening of the exterior body main body 200. Note that the lid 100 and the exterior body 200 may be formed of members of the same material, or may be formed of members of different materials.

  An opening 100a, which is a rectangular through hole, is formed at the center of the lid 100, and rectangular notches are formed at the corners of the lid 100 on the X axis plus side and on both sides in the Y axis. An opening 100b is formed. The lid 100 is further formed with an opening 100c which is a rectangular cutout at the center in the X-axis direction and on the minus side in the Y-axis direction. Further, the lid body 100 is formed with a lower surface portion 105 that forms an outer surface closer to the harness plate 50 than other portions.

  The storage element 20 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 20 has a flat rectangular parallelepiped shape (square shape), and in this embodiment, eight power storage elements 20 (power storage elements 20A to 20H) are arranged in the Y-axis direction. In addition, the shape of the electrical storage element 20 and the number of the electrical storage elements 20 arranged are not limited. The storage element 20 is not limited to a non-aqueous electrolyte secondary battery, and may be a secondary battery other than a non-aqueous electrolyte secondary battery, a capacitor, or a user charging a battery. The battery may be a primary battery that can use the stored electricity without having to perform the operation.

  Specifically, the electricity storage element 20 includes a metal container 21, and a lid portion of the container 21 is provided with a positive electrode terminal 22 and a negative electrode terminal 23 that are metal electrode terminals. The lid portion of the container 21 may be provided with a liquid injection part for injecting an electrolytic solution, a gas discharge valve for discharging gas and releasing the pressure when the pressure in the container 21 increases. In addition, an electrode body (also referred to as a power storage element or a 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 21, and an electrolytic solution (nonaqueous electrolyte) or the like Although it is enclosed, detailed description is omitted.

  In the present embodiment, the positive electrode terminal 22 and the negative electrode terminal 23 have screw threads arranged so as to protrude from the lid portion of the container 21 toward the lid body 100 (upward, that is, toward the Z axis direction plus side). A bolt terminal having a formed bolt portion. Then, the negative electrode terminal 23 of the electricity storage element 20A, which is the outermost electrode terminal of the plurality of electricity storage elements 20, and the positive electrode terminal 22 of the electricity storage element 20H are the corners on the X axis direction plus side and the Y axis direction both sides of the lid 100. It is exposed from the opening 100b formed. The outermost electrode terminal is connected to an external terminal (not shown), or the outermost electrode terminal functions as an external terminal, so that the power storage device 10 charges electricity from the outside. Electricity can be discharged to the outside.

  The inner lid 30 is a flat rectangular member that constitutes the inner lid of the exterior body 11, and has a function of reinforcing the exterior body main body 200. Further, the inner lid 30 is disposed between the harness plate 50 and the power storage element 20, holds the harness plate 50 from below, and holds the power storage element 20 from above. The inner lid 30 is made of an insulating material such as PC, PP, PE, PPS, PBT, or ABS resin. Moreover, the opening part 31 is formed in the corner | angular part of the X-axis direction plus side and the Y-axis direction both sides of the inner cover 30. FIG. The opening 31 is provided with a thermistor 63 and a detection terminal 80 described later.

  The bus bar 40 is a rectangular plate-like member that is disposed on the plurality of power storage elements 20 (on the inner lid 30) and electrically connects the electrode terminals of the plurality of power storage elements 20 to each other. The bus bar 40 is formed of a conductive member made of metal such as copper, copper alloy, aluminum, aluminum alloy, for example. Specifically, a through hole is formed in the bus bar 40, and a bolt part of an electrode terminal of the power storage element 20 is inserted into the through hole, and a nut 90 (see FIG. 3) is fastened to the bolt part. Thus, the bus bar 40 and the electrode terminal are connected. In the present embodiment, one positive terminal 22 and the other negative terminal 23 of two adjacent power storage elements 20 are connected by a bus bar 40. Thereby, the eight electrical storage elements 20 are connected in series. In addition, the connection aspect of the electrical storage element 20 is not limited to the above, The serial connection and the parallel connection may be combined in any way.

  In the present embodiment, a detection terminal 80 that is a voltage detection terminal is disposed in contact with each of the plurality of bus bars 40. Specifically, the detection terminal 80 is disposed on the upper surface of the bus bar 40, and the bus bar 40 and the detection terminal 80 are fastened together by the nut 90. That is, the detection terminal 80 is fixed in a state where it is in contact with the bus bar 40 by the nut 90 that fixes the bus bar 40 to the electrode terminal of the power storage element 20.

  Further, as described above, the thermistor 63 is disposed at the detection terminal 80 disposed on each of the negative electrode terminal 23 of the power storage element 20A and the positive electrode terminal 22 of the power storage element 20H, which is the outermost electrode terminal of the plurality of power storage elements 20. ing. That is, in this embodiment, positive electrode terminal 22 of power storage element 20H, which is the total positive terminal of power storage element units composed of power storage elements 20A-20H connected in series, and power storage element that is the total negative terminal of the power storage element unit The temperature of each negative electrode terminal 23 of 20A is measured by the thermistor 63.

  The harness plate 50 is an example of a wiring holding member, and is a flat rectangular member on which electrical components such as the internal wiring 65, the first connector 85, and the second connector 86 are arranged. Harness plate 50 is disposed between power storage element 20 and lid 100.

  The harness plate 50 is made of, for example, an insulating material such as PC, PP, PE, PPS, PBT, or ABS resin. That is, the harness plate 50 is placed on the inner lid 30, holds the internal wiring 65, the first connector 85, the second connector 86, and the like, and insulates the internal wiring 65 from the other members, and The position of the internal wiring 65 is regulated.

  The internal wiring 65 includes a first wiring 65 a that electrically connects each electrode terminal of the power storage element 20 and the first connector 85, and a second wiring that electrically connects the two thermistors 63 and the second connector 86. 65b and attached to the harness plate 50. For example, the internal wiring 65 is held on the harness plate 50 by being hooked on the first restricting portion 51 that is a claw-shaped portion provided on the harness plate 50. Details of the structure for attaching the internal wiring 65 to the harness plate 50 will be described later with reference to FIG.

  In the present embodiment, the first connector 85 is a connector having a plurality of pins in the connection port 85a, and the second connector 86 is a connector having a plurality of pins in the connection port 86a. That is, a connector having a plurality of pin holes provided at the end of the external wiring is inserted into each of the connection port 85a of the first connector 85 and the connection port 86a of the second connector 86.

  The first connector 85 is attached to the harness plate 50 in a state where the rear end portion is supported by the first connector support portion 55 a of the harness plate 50. The second connector 86 is attached to the harness plate 50 in a state where the rear end portion is supported by the second connector support portion 55 b of the harness plate 50. As for each of the first connector 85 and the second connector 86, the rear end portion on the side opposite to the connection port (85a or 85b) is supported by the connector support portion (55a or 55b). .

  The first wiring 65a and the second wiring 65b will be described with reference to FIGS. 4A and 4B in addition to FIG. 4A is a plan view showing a layout of the first wiring 65a according to the embodiment, and FIG. 4B is a plan view showing a layout of the second wiring 65b according to the embodiment. In FIG. 4A, a broken line is attached to the first wiring 65a in FIG. 4A, and a broken line is attached to the second wiring 65b in FIG. 4B so that the layout of the first wiring 65a and the second wiring 65b can be easily seen. Has been. In addition, in FIG. 4A, the detection terminal 80 is hatched so that the positions of the detection terminal 80 and the thermistor 63 are easily visible, and in FIG. 4B, the thermistor 63 is dotted.

  The first wiring 65 a is a wiring for a relatively high voltage that is electrically connected to each of the plurality of power storage elements 20. Specifically, the first wiring 65a is a wiring that connects the nine detection terminals 80 (80a to 80i) and the first connector 85, as shown in FIGS. 3 and 4A. The second wiring 65b is a wiring that connects the two thermistors 63 and the second connector 86, as shown in FIGS. 3 and 4B. That is, the second wiring 65b is a wiring through which a temperature detection current flows, that is, a voltage wiring lower than the first wiring 65a.

  As shown in FIGS. 4A and 4B, the first connector 85 is disposed at the center of the harness plate 50, and the second connector 86 is disposed at the end of the harness plate 50. External wiring is detachably connected to each of the first connector 85 and the second connector 86. For example, the control device that controls the power storage device 10 includes the first connector 85, the second connector 86, and the external wiring connected to each of these connectors, the voltage and power storage of each power storage element 20 of the power storage device 10. The temperature of the device 10 can be measured.

  In the present embodiment, out of the nine detection terminals 80, detection terminals 80 a and 80 i, which are the outermost two detection terminals 80, are connected to the electrode terminals of power storage element 20. Specifically, the detection terminal 80a is connected to the negative terminal 23 of the power storage element 20A, and the detection terminal 80i is connected to the positive terminal 22 of the power storage element 20H. Each of the detection terminal 80a and the detection terminal 80i is fixed to the electrode terminal by a nut not shown in FIG.

  Each of the detection terminals 80b to 80h is connected to the bus bar 40 as shown in FIGS. 3 and 4A. Specifically, each of the detection terminals 80b to 80h is fixed with the nut 90 in contact with the one bus bar 40 as described above. One bus bar 40 is connected to one positive terminal 22 and the other negative terminal 23 of two adjacent power storage elements 20. That is, each of the detection terminals 80 b to 80 h is electrically connected to one positive terminal 22 and the other negative terminal 23 of the corresponding two storage elements 20. For example, the detection terminal 80b is electrically connected to the positive terminal 22 of the power storage element 20A and the negative terminal 23 of the power storage element 20B.

  With the above configuration, the control device connected to the first connector 85 can measure, for example, the voltage of one power storage element 20 by measuring the potential difference between the two detection terminals 80. For example, the voltage of the power storage element 20B is measured by measuring the potential difference between the detection terminal 80b and the detection terminal 80c.

  Note that the first wiring 65 a can also be used as a wiring for equalizing the voltage of each power storage element 20. For example, when the voltage of the power storage element 20B is higher than the voltage of other power storage elements 20, the control device connected to the first connector 85 uses a discharge circuit (balance circuit) for the detection terminal 80b and the detection terminal 80c. By connecting via the power storage element 20B, the power storage element 20B can be discharged. Thereby, the voltage of the electrical storage element 20B is reduced. That is, the voltages of the plurality of power storage elements 20 can be made uniform.

  Further, as shown in FIG. 4B, a thermistor 63 is attached to each of the detection terminal 80a and the detection terminal 80i, and the two thermistors 63 are connected to the second connector 86 via the second wiring 65b. . Specifically, a pair of electric wires is connected to each of the two thermistors 63 as the second wiring 65b. The control device connected to the second connector 86 can measure the temperature of the power storage device 10 thermally connected to the thermistor 63 by measuring the resistance value of the thermistor 63 via the pair of wires. it can.

  As described above, power storage device 10 according to the present embodiment includes power storage element 20, first wiring 65a that is electrically connected to power storage element 20, harness plate 50 that holds first wiring 65a, The first connector 85 is connected to the first wiring 65a, and is located at the center of the harness plate 50 and includes a first connector 85 that can attach and detach external wiring.

  According to this configuration, the power storage device 10 is provided with the first wiring 65 a electrically connected to the power storage element 20 being held by the harness plate 50. Therefore, for example, when the power storage device 10 is manufactured (assembled), the first wiring 65 a can be incorporated in the power storage device 10 while being held by the harness plate 50. Thereby, for example, pinching between the members of the first wiring 65a hardly occurs. Further, for example, as compared with the case where the degree of freedom of movement of the first wiring 65a is high, there is a possibility of occurrence of problems such as disconnection of the first wiring 65a or disconnection of the connection portion between the first wiring 65a and the detection terminal 80. Is reduced. Further, since the first connector 85 is located in the center portion of the harness plate 50, the first connector 85 is in an energized state with the power storage element 20 in a case where, for example, a mobile body on which the power storage device 10 is mounted has a collision accident. The possibility of damage to the first connector 85 is reduced. That is, the occurrence of an unsafe event such as an external short circuit due to damage to the first connector 85 is suppressed.

  Here, in an automobile such as EV or PHEV, the power storage device 10 is disposed in a posture in which the harness plate 50 is positioned on the plurality of power storage elements 20, that is, in a posture in which the positive side in the Z-axis direction in the present embodiment is upward. Assuming that In this case, for example, when a traveling automobile collides with an object, an impact is applied to the power storage device 10 mainly from the side (direction parallel to the XY plane). Under this condition, the side of the first connector 85 located at the center of the harness plate 50 in a plan view (when viewed from the direction in which the harness plate 50 and the plurality of power storage elements 20 are arranged) Some must exist. Therefore, for example, a part of the harness plate 50 that is located around the first connector 85 functions as a buffer member that absorbs an impact. As a result, the impact applied to the first connector 85 is suppressed. That is, it can be said that the first connector 85 is disposed at a position in the harness plate 50 that is not easily subjected to an impact caused by a collision accident or the like.

  As described above, the power storage device 10 according to the present embodiment is a power storage device 10 that includes the first connector 85 to which an external wiring can be attached and detached and has high safety.

  In the present embodiment, for example, as shown in FIG. 1, an opening 100 a is provided at the center of the lid 100 that covers the harness plate 50. Therefore, even when the lid 100 is disposed above the harness plate 50, the connection port 85a of the first connector 85 (opening through which the end of the external wiring is inserted / extracted) is exposed from the opening 100a. Therefore, the external wiring can be attached to and detached from the first connector 85.

  In the present embodiment, the harness plate 50 is disposed between the positive terminal 22 and the negative terminal 23 of each of a plurality (eight in the present embodiment) of the storage elements 20. That is, the harness plate 50 is disposed using the space between the positive electrode terminal 22 and the negative electrode terminal 23 provided so as to protrude from the container 21 of the energy storage device 20.

  That is, the harness plate 50 is located in the center part of the electrical storage apparatus 10 in the alignment direction (X-axis direction) of the positive electrode terminal 22 and the negative electrode terminal 23, for example. Therefore, for example, when an impact is applied to the power storage device 10 from the side in the X-axis direction, the influence of the impact on the harness plate 50 is reduced. As a result, for example, the protection of the first connector 85 against the impact is further ensured.

  In the present embodiment, the length of the harness plate 50 in the arrangement direction (Y-axis direction) of the plurality of power storage elements 20 is equal to the width in the Y-axis direction of the power storage element unit including the plurality of power storage elements 20. It is substantially the same (for example, refer FIG. 4A). Therefore, it can be said that the first connector 85 is located at the center of the power storage device 10 and the second connector 86 is located at the end of the power storage device 10 in plan view.

  In addition, the power storage device 10 according to the present embodiment is a second wiring 65b that is a voltage wiring lower than the first wiring 65a, and includes a second wiring 65b that is held by the harness plate 50, and a second wiring. And a second connector 86 connected to 65b and positioned at the end of the harness plate 50.

  According to this configuration, as described above, for example, at the end of the harness plate 50 in the power storage device 10 in which the possibility of damage to the first connector 85 for high voltage is reduced when a collision accident occurs. The ease of attaching and detaching external wiring to the low voltage second connector 86 is ensured.

  Here, when an excessive external force is applied to the connector due to, for example, the mobile body mounting the power storage device 10 colliding with an object or the external wiring being attached / detached to / from the connector forcibly, the connector Can be damaged. If the connector is damaged, the state of the power storage device 10 cannot be correctly confirmed, or a safety problem such as the occurrence of an external short circuit may occur.

  Therefore, in the power storage device 10 according to this aspect, the first connector 85 to which a relatively high voltage is applied reduces the possibility of damage in an emergency such as a collision accident. Further, with respect to the second connector 86 to which a relatively low voltage is applied, the possibility of damage to the second connector 86 when the external wiring is attached / detached is reduced by ensuring the ease of attaching / detaching the external wiring. Thereby, a highly safe power storage device is obtained.

  Further, the harness plate 50 according to the present embodiment has a structure for regulating the position of the internal wiring 65 that tends to be complicated. This structure will be described with reference to FIG. 5 in addition to FIGS. 4A and 4B described above.

  FIG. 5 is an enlarged perspective view showing a part of the harness plate 50 according to the embodiment. Specifically, FIG. 5 shows an enlarged portion of the harness plate 50 in front of the first connector 85 (on the connection port 85a side).

  As shown in FIG. 5, the harness plate 50 according to the present embodiment includes the first wiring 65 a and the second wiring 65 b in the first region 56 a (see FIGS. 4A and 4B). It has a regulation part (51, 52) which regulates to a position lined up in a direction intersecting with the 50 line direction (Z-axis direction).

  Specifically, the first restriction part 51 that is a claw-like part and the second restriction part 52 that is a protrusion-like part are provided on the harness plate 50 as restriction parts according to the present embodiment. Each of the plurality of first restricting portions 51 hooks and holds the first wiring 65a or the second wiring 65b. In addition, one set of the second restriction portions 52 among the plurality of second restriction portions 52 holds the first wiring 65a or the second wiring 65b. Each of the first wiring 65a and the second wiring 65b is arranged in a direction (XY plane) along the upper surface of the harness plate 50 (one surface of the internal wiring 65) by at least one of the first restricting portion 51 and the second restricting portion 52. It is restricted to the position lined up in the (along direction). Thus, in the first region 56a of the harness plate 50, the first wirings 65a do not overlap vertically, the second wirings 65b do not overlap vertically, and the first wiring 65a and the second wiring 65b Does not overlap vertically.

  Thus, according to the harness plate 50 according to the present embodiment, since the first wiring 65a and the second wiring 65b do not overlap each other at least in the first region 56a, the size in the vertical direction increases. It is suppressed. Specifically, according to the harness plate 50 according to the present embodiment, the first uses the space between the plurality of power storage elements 20 and the lid 100 and does not waste the space. The wiring 65a and the second wiring 65b can be held. More specifically, as described above, the harness plate 50 is disposed in the space between the positive terminal 22 and the negative terminal 23. Therefore, an increase in the size of power storage device 10 due to the presence of harness plate 50 in power storage device 10 is suppressed.

  Even if the lid 100 (see FIGS. 1 and 2) is disposed above the harness plate 50, the first wiring 65a or the second wiring 65b is disconnected by being pressed from the lid 100. The possibility of is reduced. This contributes to the improvement of the safety of the power storage device 10.

  In the present embodiment, the height of the first restricting portion 51 and the second restricting portion 52 (the height from the arrangement surface 50a of the internal wiring 65 in the harness plate 50) is the same (including substantially the same). In addition, the lower surface portion 105 of the lid body 100 facing the first region 56 a exists at a height that is in contact with the first restricting portion 51 and the second restricting portion 52. Therefore, the 1st control part 51 and the 2nd control part 52 function also as a support for the cover body 100 (low surface part 105) not pressing the 1st wiring 65a and the 2nd wiring 65b.

  In the present embodiment, each of the first wiring 65a and the second wiring 65b (more specifically, each of the plurality of electric wires constituting the first wiring 65a and the second wiring 65b) is provided between both ends. The portion (covered portion) is held by the restriction portion (at least one of the first restriction portion 51 and the second restriction portion 52) of the harness plate 50. Therefore, the postures or positions of the flexible first wiring 65a and second wiring 65b in the exterior body 11 can be stably maintained.

  As shown in FIGS. 4A, 4B, and 5, in the harness plate 50 according to the present embodiment, the first wiring 65a and the second wiring 65b are on the opening (connection port 85a) side of the first connector 85. The second region 56b is detoured.

  The second region 56b is a region on the side of the first connector 85 in plan view, and is a region on the side where the connection port 85a is provided. For example, the size and shape of the second region 56b are determined by the size and shape of the connector provided at the end of the external wiring inserted into the connection port 85a.

  According to this configuration, for example, the ease of attaching and detaching the external wiring is ensured also for the first connector 85 arranged in the central portion of the harness plate 50. Therefore, for example, the possibility of damage to the first connector 85 when the external wiring is attached to or detached from the first connector 85 is reduced. That is, for example, since there is no space in front of the connection port 85a of the first connector 85, an operation of applying unnecessary stress to the first connector 85 is performed such that external wiring is inserted in an oblique direction with respect to the connection port 85a. Is less likely to occur.

  Further, in the present embodiment, the connection port 85 a of the first connector 85 opens toward the direction along the arrangement surface 50 a of the internal wiring 65 in the harness plate 50. That is, when the external wiring is inserted into the connection port 85a of the first connector 85, the protruding direction of the external wiring from the first connector 85 is the direction along the arrangement surface 50a. Therefore, for example, the external wiring can be connected to the first connector 85 in a posture that does not protrude from the power storage device 10. Thereby, for example, the possibility of damage to the external wiring or the first connector 85 due to external force applied to the external wiring can be reduced.

  Moreover, the harness plate 50 has the wall part 54 standingly arranged along at least one part of the periphery of the 2nd area | region 56b. Thus, the presence of the wall portion 54 on the harness plate 50 allows the first wiring 65a and the second wiring 65b to be connected when the first wiring 65a and the second wiring 65b are arranged on the harness plate 50 or after the arrangement. , It can be forcibly positioned outside the second region 56b. Therefore, for example, the ease of attaching / detaching the external wiring to / from the first connector 85 is further ensured. Therefore, the possibility of damage to the first connector 85 when the external wiring is attached to and detached from the first connector 85 is further reduced.

  In the present embodiment, the wall portion 54 is disposed so as to surround the second region 56 b in the harness plate 50. Thereby, the first wiring 65a and the second wiring 65b can be substantially completely excluded from the second region 56b. Further, for example, when the worker attaches / detaches the external wiring to / from the first connector 85 after the lid 100 is disposed, the worker's finger is prevented from touching the first wiring 65a or the second wiring 65b. The That is, the safety when attaching / detaching the external wiring to / from the first connector 85 is improved.

  Here, it is also possible to configure one battery pack by combining a plurality of power storage devices 10 according to the present embodiment. Then, the battery pack 1 which concerns on this Embodiment is demonstrated using FIG.6 and FIG.7.

  FIG. 6 is a plan view showing a first configuration example of the battery pack 1 according to the embodiment, and FIG. 7 is a plan view showing a second configuration example of the battery pack 1 according to the embodiment. In FIG. 7, the external wiring is schematically represented by a thick line.

  As described above, the lower surface portion 105 that forms the outer surface closer to the harness plate 50 than the other portions is formed on the lid 100 included in the power storage device 10 according to the present embodiment. This low surface part 105 exists in the position which opposes the 1st area | region 56a (refer FIG. 4A and 4B) of the harness plate 50. FIG.

  That is, as described with reference to FIG. 5, in the first region 56a, the first wiring 65a and the second wiring 65b are arranged so as not to overlap in the vertical direction, and therefore, the position facing the first region 56a. It is possible to form the low surface portion 105.

  In the present embodiment, the low surface portion 105 is provided as a concave portion existing between the convex portion 101 and the convex portion 102 in the lid body 100, and this concave portion is used to show FIG. 6. Thus, external wiring can be arranged.

  Specifically, the battery pack 1 shown in FIG. 6 includes three power storage devices 10, a first power storage device 10 </ b> A, a second power storage device 10 </ b> B, a third power storage device 10 </ b> C, and three conductive members 12. A member 12A, a second conductive member 12B, and a third conductive member 12C are provided. First conductive member 12A is external wiring (external harness) connected to first power storage device 10A. Similarly, the second conductive member 12B and the third conductive member 12C are external wiring (external harness) connected to the second power storage device 10B and the third power storage device 10C.

  The first conductive member 12A is connected to the first connector 85 of the first power storage device 10A, the second conductive member 12B is connected to the first connector 85 of the second power storage device 10B, and the third conductive member 12C is It is connected to the first connector 85 of the three power storage devices 10C. At this time, the first conductive member 12A is disposed on the lower surface portion 105 of the first power storage device 10A, and the second conductive member 12B is disposed on the lower surface portion 105 of the first power storage device 10A and the lower surface portion 105 of the second power storage device 10B. Be placed. Similarly, the third conductive member 12C is disposed on the lower surface portion 105 of the first power storage device 10A, the lower surface portion 105 of the second power storage device 10B, and the lower surface portion 105 of the third power storage device 10C.

  Each power storage device 10 is provided with, for example, a harness cover 210 that covers the conductive member 12 (the outer shape is indicated by a broken line in FIG. 6). By this harness cover 210, for example, the convex portion 101 and the convex portion 102 are connected in a flush manner.

  As described above, when the power storage devices 10 according to the present embodiment are arranged so that the lower surface portions 105 of the respective power storage devices 10 are arranged, one or more external wiring paths are formed by the lower surface portions 105 of the power storage devices 10. Is done. By disposing one or more external wires in the passage, the battery pack 1 can be configured without increasing the size in the height direction (Z-axis direction).

  Moreover, since each 1st connector 85 of the some electrical storage apparatus 10 with which the battery pack 1 is provided is located inside the edge part of the battery pack 1 in planar view, the moving body which mounted the battery pack 1 temporarily is provided. Even when a collision accident or the like occurs, the first connector 85 is hardly damaged.

  Further, in this way, when a power storage device row configured by arranging a plurality of power storage devices 10 in the X-axis direction is arranged in the Y-axis direction, these power storage device rows are arranged close to each other as shown in FIG. be able to.

  Specifically, in power storage device 10 according to the present embodiment, in plan view, first connector 85 is disposed at the center and second connector 86 is disposed at the end. Therefore, for example, when two power storage devices 10 are arranged in the arrangement direction (Y-axis direction) of the first connector 85 and the second connector 86, the second connectors 86 of the two power storage devices 10 are opposite to each other. Deploy.

  That is, as illustrated in FIG. 7, when the power storage device row including the first power storage device 10A and the second power storage device 10B and the power storage device row including the fourth power storage device 10D and the fifth power storage device 10E are arranged, The two power storage device rows are arranged so that the second connector 86 in the device row faces outward. Thereby, the two power storage device rows can be arranged close to each other, and the ease of attaching and detaching the external wiring (conductive member 13) to the second connector 86 is ensured.

  Note that the number of power storage devices 10 included in the battery pack 1 is not particularly limited. For example, the number of power storage devices 10 may be determined according to the specification of the mobile object on which the battery pack 1 is mounted. Although not illustrated in FIGS. 6 and 7, the battery pack 1 may include a housing that houses the plurality of power storage devices 10 included in the battery pack 1.

(Modification)
Next, a modification of the above embodiment will be described. In the above embodiment, the electrode terminal of the electricity storage element 20 is a bolt terminal having a bolt part, and the bolt part is inserted into the through hole of the bus bar 40 and the nut is fastened to the bolt part, whereby the electricity storage element 20. The electrode terminal and the bus bar 40 were connected. However, in this modification, the electrode terminal of the electricity storage element does not have a bolt part, and is a welding terminal connected (joined) to the bus bar by welding.

  FIG. 8 is a cross-sectional view showing a configuration around lid 300 of the power storage device according to the modification of the present embodiment. FIG. 9 is a plan view showing a configuration of a power storage device according to a modification of the present embodiment. As shown in FIGS. 8 and 9, the power storage device 20 in this modification (power storage devices 20I to 20K in the figure) is replaced with the positive electrode terminal 22 and the negative electrode terminal 23 of the power storage device 20 in the above embodiment. A positive terminal 24 and a negative terminal 25 are provided. Further, the bus bar 42 in this modification has a terminal connection part 42a and an intermediate part 42b.

  The positive terminal 24 and the negative terminal 25 are welding terminals that are connected (joined) to the bus bar 42 by welding. Specifically, the positive terminal 24 and the negative terminal 25 are joined to the terminal connection part 42a of the bus bar 42 by welding. For example, the positive terminal 24 of the power storage element 20I is welded and joined to one terminal connection part 42a of the bus bar 42, and the negative terminal 25 of the power storage element 20J is welded and joined to the other terminal connection part 42a of the bus bar 42. Is done.

  That is, the terminal connection portion 42 a is a portion of the bus bar 42 that is connected to the electrode terminal of the power storage element 20, and is connected to the electrode terminals of two different power storage elements 20 with respect to one bus bar 42. Two terminal connection portions 42a are arranged. Moreover, the intermediate part 42b is a site | part arrange | positioned between the two terminal connection parts 42a. The intermediate portion 42b is a curved portion (hinge portion) provided so that the bus bar 42 can expand and contract in the Y-axis direction and the Z-axis direction, and protrudes from the two terminal connection portions 42a to the positive side in the Z-axis direction. Is provided.

  Moreover, the cover body 300 in this modification has the convex part 310 and the recessed part 320 instead of the uneven structure formed in order to accommodate the some bolt terminal of the cover body 100 in the said embodiment. . In other words, the convex portion 310 is a convex portion with an outer surface protruding facing the bus bar 42, and the concave portion 320 is a concave portion with an outer surface disposed adjacent to the convex portion 310.

  Here, the convex part 310 has the 1st convex part 311 arrange | positioned facing the electrode terminal (In the same figure, the positive electrode terminal 24 and the negative electrode terminal 25 of the electrical storage elements 20I-20K). . That is, the first convex portion 311 is disposed to face the terminal connection portion 42 a of the bus bar 42. Specifically, the first convex portion 311 is disposed so as to cover the electrode terminal of the electricity storage device 20 and the upper side of the terminal connection portion 42a (Z-axis direction plus side), and is a top view (viewed from the Z-axis direction). And a shape (rectangular shape in the figure) corresponding to the electrode terminal and the terminal connection portion 42a. Moreover, the 1st convex part 311 protrudes rather than the 1st recessed part 321 and the 2nd recessed part 322 of the recessed part 320 mentioned later.

  Moreover, the convex part 310 has the 2nd convex part 312 arrange | positioned facing the intermediate part 42b of the bus-bar 42. FIG. Specifically, the second convex portion 312 is disposed so as to cover the upper portion (Z-axis direction plus side) of the intermediate portion 42b, and corresponds to the intermediate portion 42b in a top view (viewed from the Z-axis direction). It has the shape (rectangular shape in the figure). The second convex portion 312 is formed so as to protrude from the first convex portion 311.

  The concave portion 320 is disposed between two first convex portions 311 disposed opposite to electrode terminals of two different power storage elements 20 (for example, the negative electrode terminal 25 of the power storage element 20J and the positive electrode terminal 24 of the power storage element 20K). The first recess 321 is provided. Specifically, the first recess 321 is disposed between two adjacent bus bars 42 so as to face the lid portion of the container 21 of the power storage element 20 and is viewed from above (viewed from the Z-axis direction). The shape corresponding to the space between the two bus bars 42 (rectangular shape in the figure).

  In addition, the concave portion 320 is disposed between two first convex portions 311 that are disposed to face two electrode terminals (for example, the positive electrode terminal 24 and the negative electrode terminal 25 of the electric storage device 20I) of the same electric storage device 20. The second recess 322 is provided.

  Furthermore, the recessed part 320 has the 3rd recessed part 323 dented rather than the 2nd convex part 312 arrange | positioned facing the at least 1 terminal connection part 42a of the two terminal connection parts 42a. In the present modification, the third concave portion 323 is the first convex portion 311 described above. In other words, the first convex portion 311 is a convex portion with respect to the first concave portion 321 and the second concave portion 322, but is a concave portion with respect to the second convex portion 312. it can.

  In the above configuration, the conductive member 12 is disposed in the recess 320 as described with reference to FIG. That is, the conductive member 12 is disposed in any one of the first recess 321, the second recess 322, and the third recess 323.

  Here, for example, when the conductive member 12 is arranged extending in the X-axis direction (in the case of the second conductive member 12B or the third conductive member 12C in FIG. 6), the conductive member 12 is moved to the first recess. If the conductive member 12 is disposed at 321 and extends in the X-axis direction, the conductive member 12 interferes with the second convex portion 312.

  Specifically, the groove-shaped portion formed by the first concave portion 321 and the second concave portion 322 disposed to face each other between the negative electrode terminal 25 of the energy storage device 20J and the positive electrode terminal 24 of the energy storage device 20K is electrically conductive. It is possible to arrange the member 12. However, with respect to the conductive member 12 (second conductive member 12B or third conductive member 12C in FIG. 6) arranged extending straight in the X-axis direction across adjacent power storage devices 10, the power storage element Since the second convex portion 312 and the conductive member 12 that are disposed to face each other between the positive terminal 24 of 20J and the negative terminal 25 of the storage element 20K are disposed so as to overlap in the Z-axis direction, The height dimension of the entire unit will increase.

  In such a case, the conductive member 12 can be arranged in parallel to the X-axis direction by arranging the conductive member 12 in the third recesses 323 (and the second recesses 322) on both sides in the X-axis direction. As shown in FIG. 6, when connecting the conductive member 12 to the first connector 85, the conductive member 12 can also be disposed in the first recess 321. For example, the first conductive member 12A in FIG. 6 can be disposed in the first recess 321 without any problem.

  For the second conductive member 12B and the third conductive member 12C in FIG. 6, as another solution to the above-described problem of interference in the Z-axis direction, for example, the conductive member between the second recess 322 or the adjacent power storage devices 10. It is possible to arrange the conductive member 12 in the first concave portion 321 by bending 12 and avoiding the second convex portion 312.

  Other configurations in the present modification are the same as those in the above embodiment, and thus detailed description thereof is omitted.

  The power storage device 10 and the battery pack 1 according to the embodiment of the present invention have 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.

  For example, in the above embodiment, the power storage device 10 includes the harness plate 50 as a wiring holding member. However, the wiring holding member does not need to be a member that is generally recognized as a “plate”. For example, a frame structure member that holds the internal wiring 65, the first connector 85, and the second connector 86 may be used.

  Further, the member that is electrically connected to the second connector 86 via the second wiring 65 b need not be the thermistor 63. For example, a voltage applied via the second wiring 65 b such as a liquid leakage sensor that detects liquid leakage from the power storage element 20 is an electrical component that is smaller than the rated voltage of the power storage device 10, and is different from the thermistor 63. An electrical component may be connected to the second wiring 65b. Moreover, it is an electric device connected by one or more electric wires as the second wiring 65b, and a signal indicating the state of the power storage device 10 to an external control device via the one or more electric wires and the second connector 86. May be connected to the one or more electric wires.

  Further, the number of members such as the thermistor provided in the power storage device 10 and electrically connected to the second connector 86 via the second wiring 65b is not limited to “2”. The number of the members may be one or more. Different types of members (for example, each of the thermistor and the leak sensor) may be electrically connected to the second connector 86 via the second wiring 65b.

  Further, each of the first connector 85 and the second connector 86 has a plurality of pins for connection to external wiring, but is particularly limited to the shape and type of each of the first connector 85 and the second connector 86. There is no. For example, the first connector 85 or the second connector 86 may have a plurality of pin holes into which a plurality of pins included in the connector at the end of the external wiring are inserted.

  In addition, the shape of the power storage element 20 included in the power storage device 10 does not have to be a square shape. The shape of the storage element 20 may be, for example, a circle, an ellipse, an oval, a polygon other than a rectangle, or a combination of a curve and a straight line in plan view. In any case, the above-described effects such as the improvement of safety by the harness plate 50 according to the present embodiment are exhibited.

  In the above embodiment, the electrode terminal (each of the positive electrode terminal 22 and the negative electrode terminal 23) of the power storage element 20 has a bolt part, and the bolt part is inserted into the through hole of the bus bar 40 and the bolt part. When the nut is fastened, the electrode terminal of the electricity storage device 20 and the bus bar 40 are connected. However, the electrode terminal of the electrical storage element 20 does not have a bolt part, and the electrode terminal and the bus bar 40 may be connected (joined) by welding. Moreover, the joining method of the detection terminal 80 and the electrode terminal or the bus bar 40 is not limited to the fastening by the nut, and may be joined by welding.

  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.

  Note that the present invention can be realized not only as the power storage device 10 but also as a wiring holding member (the harness plate 50 in the embodiment) provided in the power storage device 10.

  The present invention can be applied to a power storage device including a power storage element such as a lithium ion secondary battery.

DESCRIPTION OF SYMBOLS 10 Power storage device 10A 1st power storage device 10B 2nd power storage device 10C 3rd power storage device 10D 4th power storage device 10E 5th power storage device 12, 13 Conductive member 12A First conductive member 12B Second conductive member 12C Third conductive member 20, 20A to 20K Power storage element 50 Harness plate 51 First restricting portion 52 Second restricting portion 54 Wall portion 56a First region 56b Second region 65a First wire 65b Second wire 85 First connector 85a, 86a Connection port 86 Second connector 100, 300 Lid 105 Lower surface

Claims (6)

A storage element;
A first wiring electrically connected to the power storage element;
A wiring holding member for holding the first wiring;
A first connector connected to the first wiring, located in the center of the wiring holding member, and a first connector to which external wiring can be attached and detached;
A power storage device comprising: Furthermore, the second wiring is a voltage wiring lower than the first wiring, the second wiring held by the wiring holding member,
A second connector connected to the second wiring and located at an end of the wiring holding member;
The power storage device according to claim 1. The wiring holding member has a restricting portion that restricts the first wiring and the second wiring to a position aligned in a direction intersecting an arrangement direction of the power storage element and the wiring holding member in the first region.
The power storage device according to claim 2. Furthermore, a cover member that covers the wiring holding member from the side opposite to the power storage element is provided,
The cover member is formed with a lower surface portion that forms an outer surface closer to the wiring holding member than other portions at a position facing the first region.
The power storage device according to claim 3. The first wiring and the second wiring are arranged around the second region on the opening side of the first connector,
The power storage device according to any one of claims 2 to 4. The wiring holding member has a wall portion erected along at least a part of the periphery of the second region.
The power storage device according to claim 5.

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