Wiring Module

Abstract

To provide a wiring module in which, in a state where a connector is not connected to a mating connector, an interference between an excess length part and external other components can be suppressed.SOLUTION: A wiring module 20 is attached to a power storage element group including a plurality of power storage elements 11 arranged therein. The wiring module 20 includes: a connector 48; a plurality of wires 45 pulled out from the connector 48; and an insulating protector 50 attached to the power storage element group while holding the plurality of wires 45. The wires 45 each have an excess length part 145. The excess length part 145 includes a tip part 145A routed on a connector 48 side, a base 145B positioned on a protector 50 side, and a body part 145c arranged between the tip part 145A and the base 145B. The protector 50 includes: an excess length housing part 57 housing the body part 145C in a state where the body part can be taken out; and a holding part 58 holding the tip part 145A or the connector 48 in a state where the tip part or the connector is removable.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a wiring module. [Background technology]

[0002] Electric vehicles, hybrid vehicles, and the like are equipped with energy storage modules that include a group of high-voltage energy storage elements (battery stacks). The energy storage element group included in this type of energy storage module includes a plurality of energy storage elements arranged in a stacked manner, which are electrically connected to each other in series or in parallel. A wiring module is attached to such an energy storage element group, in which a plurality of electric wires are routed to detect the voltage, temperature, and the like of each energy storage element.

[0003] As shown in Patent Document 1, for example, a wiring module includes an insulating protector attached to a group of energy storage elements, a plurality of electric wires held by the protector, and a connector that holds the ends of the electric wires together and connects to a mating connector provided in an external device. The plurality of electric wires held by the connector have excess lengths that are not held by the protector so that they can be stretched outward to some extent from the protector side.

[0004] As shown in Patent Document 1, in order to prevent the connector from interfering with other components when the connector is not connected to the mating connector of an external device, the protector is provided with a connector holding portion for temporarily holding the connector at the tip of the excess length portion. It is being used. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 2019-36471 Summary of the Invention [Problem to be solved by the invention]

[0006] In the past, in this type of wiring module, no consideration was given to preventing the excess length connected to the connector from interfering with other components when the connector is not connected to the mating connector. The length of the excess length is set appropriately depending on the application of the energy storage module, and in some cases, the excess length may become long and interfere with other external components (e.g., a jig used in the assembly work) during assembly of the energy storage module or immediately before connecting the energy storage module to an external device. If the excess length interferes and force is applied to the excess length (e.g., pulled), the connection between the connector and the excess length may be damaged. [Means for solving the problem]

[0007] The wiring module of the present disclosure is a wiring module that is attached to a group of energy storage elements in which a plurality of energy storage elements are arranged, and includes a connector, a plurality of electric wires drawn out from the connector, and an insulating protector that is attached to the group of energy storage elements while holding the plurality of electric wires, wherein the plurality of electric wires are each composed of a portion where the electric wires are gathered in a bundle and have an excess portion that can be extended outward from the protector side together with the connector, the excess portion having a tip portion arranged on the connector side, a base portion positioned on the protector side, and a main body portion arranged between the tip portion and the base, and the protector is a wiring module that has an excess length storage portion that stores the main body portion in a removable state, and a holding portion that holds the tip portion or the connector in a removable state. [Effects of the Invention]

[0008] According to the present disclosure, it is possible to provide a wiring module in which the excess length portion is prevented from interfering with other external components when the connector is not connected to a mating connector. [Brief explanation of the drawings]

[0009] [Figure 1]FIG. 1 is a front view of a battery module according to a first embodiment. [Figure 2] FIG. 2 is a perspective view of the front of the battery stack. [Figure 3] FIG. 3 is a perspective view showing the main parts of a laminated battery. [Figure 4] FIG. 4 is an enlarged view of the slack storage section and the holding section in a state where the slack portion is stored. [Figure 5] FIG. 5 is an enlarged view of the slack storage section and the holding section when the slack section is not stored. [Figure 6] FIG. 6 is an enlarged perspective view of the slack storage section and the holding section in a state where the slack portion is stored. [Figure 7] FIG. 7 is an enlarged view of an excess length accommodation portion and a holding portion provided in a protector of a wiring module according to a second embodiment, in which two excess lengths are accommodated. [Figure 8] FIG. 8 is an enlarged view of the slack storage section and the holding section when the two slack sections are not stored. [Figure 9] FIG. 9 is an enlarged perspective view of the slack storage section and the holding section in a state in which two slack sections are stored. DETAILED DESCRIPTION OF THE INVENTION

[0010] [Description of the embodiments of the present disclosure] First, embodiments of the present disclosure will be listed and described.

[0011] (1) The wiring module of the present disclosure is a wiring module attached to a group of energy storage elements in which a plurality of energy storage elements are arranged, and includes a connector, a plurality of electric wires drawn out from the connector, and an insulating protector attached to the group of energy storage elements while holding the plurality of electric wires, wherein the plurality of electric wires are each composed of a portion where the electric wires are gathered in a bundle and have an excess portion that can be extended outward from the protector side together with the connector, the excess portion having a tip portion arranged on the connector side, a base portion positioned on the protector side, and a main body portion arranged between the tip portion and the base, and the protector is a wiring module having an excess length storage portion that stores the main body portion in a removable state, and a holding portion that holds the tip portion or the connector in a removable state.

[0012] With this configuration, the tip of the excess length portion, which can be extended outward from the protector together with the connector, or the connector can be removably held by the holding portion, while the main body of the excess length portion can be removably housed in the excess length housing portion. Therefore, in a wiring module having this configuration, when the connector is not connected to the mating connector, the connector is disposed near the protector, and the main body of the excess length portion is surrounded by the excess length housing portion, thereby preventing the connector and the main body from interfering with other external components.

[0013] (2) It is preferable that the excess length storage section includes a bottom portion arranged on the side of the energy storage element group, a wall portion extending outward from the bottom portion, and an orientation adjustment section erected on at least one of the bottom portion and the wall portion, which contacts the main body portion and adjusts the orientation of the main body portion so that the main body portion is stored in a bent state.

[0014] With this configuration, the main body of the slack portion can be brought into contact with the orientation adjustment portion, and the main body can be bent and accommodated in the slack storage portion. Therefore, even if the main body of the slack portion is long, the main body of the slack portion can be accommodated in the slack storage portion by utilizing the orientation adjustment portion provided in the slack storage portion.

[0015] (3) It is preferable that the holding portion holds the tip portion in a removable state, and the protector has a recessed shape that opens outward from the storage element group side and has a connector accommodating portion in which the connector is detachably accommodated.

[0016] With this configuration, when the holding portion holds the tip of the excess length portion, the connector is accommodated in the connector accommodating portion, and the connector is surrounded by the connector accommodating portion, thereby preventing the connector from interfering with other external components. Furthermore, with this configuration, the connector is prevented from moving significantly due to vibration, etc. Therefore, the tip of the excess length portion is prevented from coming off the holding portion due to movement of the connector.

[0017] [Details of the embodiments of the present disclosure] The present disclosure will be described below with reference to exemplary embodiments. The present disclosure is not limited to these examples, but is defined by the claims, and is intended to include all modifications within the meaning and scope of the claims.

[0018] <Embodiment 1> A first embodiment of the present disclosure will be described with reference to FIGS. 1 to 6. A battery module 10 including a wiring module 20 of this embodiment is mounted on a vehicle, such as an electric vehicle or a hybrid vehicle, and used as a drive source for the vehicle. In the following description, when multiple identical components are shown, only some of the components may be designated by reference numerals, and the reference numerals for other components may be omitted. In addition, in this specification, the direction indicated by arrow X in each drawing will be described as forward, the direction indicated by arrow Y as leftward, and the direction indicated by arrow Z as upward.

[0019] [Battery module] As shown in Figures 1 and 2, the battery module 10 mainly comprises a battery stack 11L and a wiring module 20 attached to the battery stack 11L. The battery module 10 of this embodiment also comprises a housing 15 that covers the battery stack 11L from all four sides (top, bottom, left, and right). The housing 15 has a generally rectangular tubular shape. The housing 15 comprises a plate-shaped bottom 15A located on the underside of the battery stack 11L, a plate-shaped ceiling 15B located on the top side of the battery stack 11L, and a pair of plate-shaped side portions 15C that connect the bottom 15A and ceiling 15B on both the left and right sides.

[0020] [Battery stack] As shown in FIG. 2, the battery stack (energy storage element group) 11L is configured by stacking multiple laminated batteries (energy storage elements) 11 (18 in this embodiment) in a row in the left-right direction. For ease of explanation, FIG. 2 shows only the front portion of the battery stack 11L. As shown in FIG. 3, the laminated battery 11 has a generally flat shape that extends elongatedly in the front-rear direction. These laminated batteries 11 are arranged side by side with their thickness oriented left-right. An energy storage element (not shown) is housed inside the laminated battery 11. Electrode leads 12 with opposite polarities are provided at each end of the laminated battery 11 in the front-rear direction. Each pair of electrode leads 12 with opposite polarities is plate-shaped and protrudes in opposite directions. That is, one electrode lead 12 projects forward, and the other electrode lead 12 projects backward.

[0021] As shown in FIG. 2, the battery stack 11L is provided with a joint 13 that electrically connects four electrode leads 12 that are aligned in the left-right direction and facing the same direction (for example, forward). In the process of forming the joint 13, the four electrode leads 12 are divided into two sets in the left-right direction, with each set consisting of two electrode leads. The electrode leads 12 in each set are then bent at approximately right angles in the same direction while overlapping each other. More specifically, the two overlapping electrode leads 12 in one set and the two overlapping electrode leads 12 in the other set are bent at approximately right angles so that their tip ends overlap. These overlapping portions are then joined by laser welding to form the joint 13, where the tip ends of the four electrode leads 12 are joined while overlapping each other.

[0022] In this specification, the electrode leads 12 that constitute the joints 13 may be referred to as "connection electrode leads 12A." Of the four connection electrode leads 12A that constitute one joint 13, one set of two connection electrode leads 12A located on the right side and the other set of two connection electrode leads 12A located on the left side have opposite polarities. For example, if the two connection electrode leads 12A on the right side are positive, the two connection electrode leads 12A on the left side are negative. These joints 13 connect two laminated batteries 11 connected in parallel in the battery stack 11L in series. As shown in FIG. 2, the battery stack 11L has four joints 13 in its front section. The battery stack 11L also has four similar joints (not shown) in its rear section.

[0023] As shown in FIG. 1, the battery stack 11L has an output section 14 at the left end of its front section (the right end in FIG. 1). The battery stack 11L also has a similar output section at the right end of its rear section, although this is not shown. The output section 14 is formed by joining two adjacent electrode leads 12 that do not form a joint 13, among multiple electrode leads 12 facing the same direction (e.g., forward), in a superimposed state. In this specification, the electrode leads 12 that form the output section 14 may be referred to as "output electrode leads 12B." The two output electrode leads 12B that form one output section 14 have the same polarity. The output section 14 forms the positive or negative electrode of the entire battery stack 11L. For example, if the front output section 14 shown in FIG. 2 is the overall positive electrode of the battery stack 11L, the rear output section (not shown) will be the overall negative electrode of the battery stack 11L.

[0024] [Wiring module] The wiring modules 20 are attached to the front and rear of the battery stack (energy storage element group) 11L. The wiring module 20 shown in FIG. 1 is attached to the front of the battery stack 11L. Such a wiring module 20 mainly includes a connector 48, a plurality of electric wires 45, and a protector 50. In this embodiment, the wiring module 20 further includes a terminal 30 connected to the connection electrode lead 12A, a bus bar 40 connected to the output electrode lead 12B, etc. The configuration of the wiring module 20 arranged on the front side of the battery module 10 will be described in detail below. Note that the wiring module (not shown) arranged on the rear side of the battery module 10 has a configuration similar to that of the wiring module 20 arranged on the front side, and therefore a detailed description thereof will be omitted.

[0025] [connector] The connector 48 includes a housing 48A made of insulating synthetic resin and a plurality of male terminals (not shown) housed within the housing 48A. The housing 48A is a part that constitutes the external shape of the connector 48 and is generally rectangular parallelepiped-shaped. The plurality of male terminals housed within the housing 48A are exposed from the tip side of the housing 48A. The connector 48 is detachable from an external mating connector having female terminals. The connector 48 can be attached to the mating connector by mating with it, and can be removed (disconnected) by disengaging from the mating connector. A plurality of electric wires 45, which will be described later, extend to the left from the connector 48.

[0026] The mating connector is connected to an electric wire (not shown) and is connected via the electric wire to an external ECU (Electronic Control Unit), etc. The ECU is a well-known device equipped with a microcomputer and various elements, and performs functions such as detecting the voltage, current, temperature, etc. of each laminated battery 11 and controlling the charging and discharging of each laminated battery 11.

[0027] [Electric wire] As shown in FIG. 1, the wiring module 20 includes multiple electric wires 45. Each electric wire 45 is used to detect the voltage of a laminated battery 11 and is flexible and elongated. The electric wire 45 has a conductive linear core wire and an insulating coating surrounding the core wire. One end 45a of each electric wire 45 is gathered into a bundle and connected to a connector 48. In this case, one end 45a of each electric wire 45 is held by a housing 48A and electrically connected to a respective male terminal housed within the housing 48A. In contrast, the other end 45b of each electric wire 45 is connected to a respective terminal 30.

[0028] The terminals 30 are made of conductive metal plate material processed into a predetermined shape, and are connected to the other ends 45b of the electric wires 45 and then connected to the connection electrode leads 12A. One terminal 30 is assigned to each other end 45b of each electric wire 45. In other words, the wiring module 20 includes a plurality of terminals 30. [Extra length]

[0029] The plurality of electric wires 45 have an excess length portion 145 formed by a bundle of portions extending from one end (one end) 45a to the other end (the other end) 45b of each electric wire 45. The excess length portion 145 can be extended outward from the protector 50 together with the connector 48.

[0030] The excess length portion 145 has a tip portion 145A arranged on the connector 48 side, a base portion 145B positioned on the protector 50 side, and a main body portion 145C arranged between the tip portion 145A and the base portion 145B.

[0031] Furthermore, among the multiple electric wires 45, the portions continuing from the excess portion 145 side to each end 45b of each electric wire 45 (the portions continuing from the other end 45b side of each electric wire 45 to one end 45a side) are each held by the protector 50 in a branched state.

[0032] In this embodiment, the plurality of electric wires 45 are used as voltage detection wires for detecting the voltage of each laminated battery 11.

[0033] The busbar 40 is made of a conductive metal plate processed into a predetermined shape. As shown in FIG. 1 , the busbar 40 has a first portion 40A that is a flat plate extending in the vertical direction and a second portion 40B that is a flat plate extending to the right from the upper end of the first portion 40A. The busbar 40 is held by a busbar holding portion 53 of the protector 50. The busbar 40 is connected to the output electrode lead 12B at the vertical center of the first portion 40A. A busbar-side connection portion 41 is provided at the right end of the second portion 40B.

[0034] The busbar-side connection portion 41 is plate-shaped and has an insertion hole (not shown) formed at the approximate center thereof, penetrating in the thickness direction, through which a bolt is inserted. An external connection terminal (not shown) used to connect an external device to the battery module 10 is placed on the busbar-side connection portion 41. The busbar-side connection portion 41 and the external connection terminal are placed on top of each other and fastened with a bolt, thereby electrically connecting the busbar-side connection portion 41 and the external connection terminal to each other.

[0035] [Protector] The protector 50 is an insulating plate-like member attached to the front of the battery stack 11L while holding multiple electric wires 45. It is made of, for example, a molded synthetic resin. When viewed from the front-to-rear direction, the protector 50 has a generally rectangular shape that is elongated in the left-to-right direction. The protector 50 includes a protector main body 51 that is positioned relative to the battery stack 11L.

[0036] The protector body 51 is a plate-like portion that is generally rectangular and elongated in the left-right direction when viewed from the front-rear direction. The protector body 51 is provided with an electrode accommodating portion 52, the bus bar holding portion 53, the branch wiring portion 55, the collective wiring portion 56, the slack length accommodating portion 57, a holding portion 58, and a connector accommodating portion 59.

[0037] A plurality of electrode accommodating sections 52 are provided in the protector body 51, lined up in the left-right direction. The electrode accommodating section 52 is a frame-shaped section that penetrates the protector body 51 in the thickness direction (front-rear direction) and surrounds a substantially rectangular opening that extends vertically. A total of five such electrode accommodating sections 52 are provided in the protector body 51. Of these electrode accommodating sections 52, four arranged in order from right to left (from left to right in FIG. 1 ) are connection electrode accommodating sections 52A that surround the joint section 13 and the connection electrode lead 12A while exposing them from the openings. Furthermore, the leftmost electrode accommodating section 52 (the right end in FIG. 1 ) is an output electrode accommodating section 52B that surrounds the output electrode lead 12B and the output section 14 while exposing them from the openings.

[0038] Five electrode accommodating sections 52, consisting of four connection electrode accommodating sections 52A and one output electrode accommodating section 52B, are arranged in a row with intervals between them in the left-right direction. A branch wiring section 55 is provided between each pair of adjacent electrode accommodating sections 52.

[0039] 1, four branch wiring portions 55 are provided on the protector main body 51, each extending in the vertical direction. Each branch wiring portion 55 is recessed from the front side to the rear side and has a groove shape extending long in the vertical direction. Each branch wiring portion 55 accommodates and holds the end portion 45b of the corresponding electric wire 45.

[0040] The collected wiring portion 56 is disposed above the electrode accommodating portion 52 and has a groove shape extending in the left-right direction overall. Such collected wiring portion 56 is connected to the upper end side of each branch wiring portion 55 and connected to each other. The branched electric wires 45 accommodated in each branch wiring portion 55 are collected into one while being accommodated in the collected wiring portion 56. In this way, the collected wiring portion 56 and the branch wiring portion 55 accommodate and hold the portions of the plurality of electric wires 45 that continue from the excess length portion 145 side to each end 45b of each electric wire 45.

[0041] The individual electric wires 45 housed and collected in the collective wiring section 56 pass through an opening 56B provided in the bottom 56A of the collective wiring section 56 and are gathered into one bundle in the slack length housing section 57 described later.

[0042] [Excess length storage section] The slack storage section 57 is a section that stores the main body 145C of the slack portion 145 in a removable state and is provided at an upper portion near the right side of the wiring assembly section 56. The slack storage section 57 is generally container-shaped, extending elongately in the left-right direction and opening forward. As shown in FIG. 5 , the slack storage section 57 has a plate-shaped bottom 57A disposed on the battery stack (energy storage element group) 11L side, a plate-shaped wall 57B extending outward (forward) from the bottom 57A, a first orientation adjustment section 57C1 erected on the bottom 57A, and a second orientation adjustment section 57C2 erected on the wall 57B. In this specification, the first orientation adjustment section 57C1 and the second orientation adjustment section 57C2 may be collectively referred to as the “orientation adjustment section 57C.”

[0043] When viewed from the front side, the bottom portion 57A has a generally rectangular shape that is elongated in the left-right direction. The front-facing surface of the bottom portion 57A is referred to as the front surface 57A1, and the opposite surface (the rear-facing surface) is referred to as the back surface. One left-right end of the bottom portion 57A is provided with an entrance portion 57A3 that surrounds a hole that penetrates the bottom portion 57A in the thickness direction (front-rear direction). The entrance portion 57A3 is a portion through which the multiple electric wires 45 that constitute the excess length portion 145 are passed in the front-rear direction through a hole located inside the entrance portion 57A3. As described above, the multiple electric wires 45 that are passed through the opening 56B of the wiring assembly portion 56 are passed through the entrance portion 57A3 in a bundled state (i.e., in the state of excess length portions). The base portion 145B of the excess length portion 145 that is passed through the entrance portion 57A3 is positioned by, for example, contacting the periphery of the entrance portion 57A3. That is, the base 145B of the extra length portion 145 is positioned on the protector 50 side.

[0044] Wall portion 57B is provided on the periphery of bottom portion 57A and part of the periphery of inlet portion 57A3. Wall portion 57B is a plate-like member having a predetermined thickness, and is arranged to surround surplus length portion 145 (main body portion 145C) in surplus length storage portion 57, as shown in FIG.

[0045] [Direction adjustment section] First direction adjustment portion 57C1 is a plate-shaped member erected on bottom portion 57A. If excess length portion 145 is long, excess length portion 145 may be accommodated in excess length accommodation portion 57 by, for example, wrapping excess length portion 145 around first direction adjustment portion 57C1.

[0046] The second direction adjustment portion 57C2 is erected on the wall portion 57B to cover the inlet portion 57A3 while maintaining a distance from the inlet portion 57A3 in the front-to-rear direction. The second direction adjustment portion 57C2 contacts the main body portion 145C of the excess length portion 145 passed through the inlet portion 57A3 and adjusts the direction of the main body portion 145C so that the main body portion 145C is accommodated in the excess length accommodation portion 57 in a bent state. Specifically, the main body portion 145C of the excess length portion 145 passed through the inlet portion 57A3 comes into contact with the end portion of the second direction adjustment portion 57C2, thereby bending the routing direction of the main body portion 145C.

[0047] [Holding part] The holding portion 58 is a portion that removably holds the tip portion 145A of the slack portion 145, and is provided at a position adjacent to the slack portion accommodation portion 57. The holding portion 58 rises outward (forward) from the battery stack (energy storage element group) 11L side and has a support portion 58A that includes a recessed recess 58A1 at its end on which the tip portion 145A is placed, and a gripping portion 58B that grips the bundled electric wires 45 that make up the tip portion 145A placed in the recess 58A1 of the support portion 58A. The recess 58A1 extends in the left-right direction to connect the inside of the slack portion accommodation portion 57 and the inside of the connector accommodation portion 59, and the tip portion 145A can be placed thereon while being routed in the left-right direction. The gripping portion 58B has a pair of plate pieces 58B1 provided on the support portion 58A so as to sandwich the tip portion 145A placed in the recessed portion 58A1 from above and below while maintaining a distance from each other in the vertical direction. When the tip portion 145A is inserted between the pair of plate pieces 58B1, the plate pieces 58B1 elastically deform so as to widen the distance between them. The excess length portion 145 is accommodated in the excess length accommodation portion 57 and held by the holding portion 58, thereby preventing the excess length portion 145 from protruding above or forward of the protector 50.

[0048] [Connector housing] The connector accommodating portion 59 is a recess that opens outward from the battery stack 11L side and is a portion that detachably accommodates the connector 48. The connector accommodating portion 59 is provided in a position adjacent to the holding portion 58. The holding portion 58, which holds the tip end 145A of the excess length portion 145, is positioned between the connector accommodating portion 59 and the excess length accommodating portion 57. When the tip end 145A of the excess length portion 145 is held by the holding portion 58, the connector 48 is accommodated in the connector accommodating portion 59, thereby preventing the connector 48 from protruding outward (forward) from the battery stack 11L side.

[0049] [Attaching and detaching the excess length to the holding section and excess length storage section] The battery module 10 equipped with the wiring module 20 is ultimately connected to an external device (e.g., an ECU) via a connector 48. At this time, the connector 48 is connected to a mating connector of the external device located some distance away from the wiring module 20, and therefore the excess length portion 145 connected to the connector 48 is not held by the holding portion 58 or the excess length storage portion 57, but is pulled outward from the protector 50 side. In this way, when the battery module 10 is in use, the excess length portion 145 can be pulled outward from the protector 50 side together with the connector 48.

[0050] In contrast, when the connector 48 is not connected to the mating connector, such as during assembly of the battery module 10 or immediately before connecting the battery module 10 to an external device, the tip end 145A of the excess length portion 145 is detachably held by the holding portion 58, and the main body portion 145C of the excess length portion 145 is accommodated in the excess length accommodation portion 57. In this embodiment, with the tip end 145A held by the holding portion 58, the connector 48 connected to the tip end 145A is accommodated in the connector accommodation portion 59. In this manner, the excess length portion 145 is temporarily held by the protector 50 so as not to protrude outward from the protector 50. When the excess length portion 145 is temporarily held by the protector 50 in this manner, the main body portion 145C may first be accommodated in the excess length accommodation portion 57, and then the tip end 145A may be held by the holding portion 58. Conversely, the tip portion 145A may be held by the holding portion 58 first, and then the main body portion 145C may be accommodated in the surplus length accommodating portion 57.

[0051] [Effects of the First Embodiment] According to the first embodiment, the following actions and effects are achieved. The wiring module 20 according to the first embodiment is a wiring module 20 attached to a battery stack 11L formed by arranging multiple laminated batteries 11, and includes a connector 48 that is detachable from an external mating connector, multiple electric wires 45 drawn out from the connector 48, and an insulating protector 50 that is attached to the battery stack 11L while holding the portion of each of the multiple electric wires 45 that continues from the other end 45b to one end 45a of the multiple electric wires 45. The protector 50 has an excess length storage section 57 that stores the main body 145C in a removable state, and a holding section 58 that holds the end 145A or the connector 48 in a removable state.

[0052] With this configuration, the tip portion 145A of the excess length portion, which can be extended outward from the protector 50 side together with the connector 48, or the connector 48 can be removably held by the holding portion 58, while the main body portion 145C of the excess length portion 145 can be removably housed in the excess length housing portion 57. Therefore, in the wiring module 20 having this configuration, when the connector 48 is not connected to the mating connector, the connector 48 is disposed near the protector 50, and the excess length portion 145 is housed and surrounded by the excess length housing portion 57, thereby preventing the protector 50 and the excess length portion 145 from interfering with other external components.

[0053] The excess length accommodation section 57 includes a bottom 57A arranged on the battery stack 11L side, a wall 57B extending outward from the bottom 57A, and an orientation adjustment section 57C erected on at least one of the bottom 57A and the wall 57B and contacting the main body 145C to adjust the orientation of the main body 145C so that the main body 145C is accommodated in a bent state.

[0054] According to this configuration, main body portion 145C of surplus length portion 145 can be brought into contact with direction adjusting portion 57C, and main body portion 145C can be bent and accommodated in surplus length accommodating portion 57. Therefore, even if main body portion 145C of surplus length portion 145 is long, for example, by using direction adjusting portion 57C, main body portion 145C of surplus length portion 145 can be bent and accommodated in surplus length accommodating portion 57.

[0055] The holding portion 58 holds the tip portion 145A in a removable state, and the protector 50 has a recessed shape that opens outward from the battery stack 11L side and has a connector accommodating portion 59 in which the connector 48 is detachably accommodated.

[0056] With this configuration, connector 48 is surrounded by connector accommodating portion 59, which prevents connector 48 from interfering with other external components. Furthermore, with this configuration, connector 48 is prevented from moving significantly due to vibrations or the like. Therefore, tip portion 145A of excess length portion 145 is prevented from coming off holding portion 58 as connector 48 moves.

[0057] <Embodiment 2> A second embodiment of the present disclosure will be described with reference to FIGS. 7 to 9. The same components as those in the first embodiment are designated by the same reference numerals, and a description thereof will be omitted. Furthermore, a description of the same functions and effects as those in the first embodiment will be omitted. As shown in FIG. 7, a battery module 110 according to the second embodiment includes a wiring module 120 having a protector 150. The protector 150 includes an excess length housing portion 157 that houses two excess length portions 245, 345, and two holders 258, 358 that hold the leading ends 245A, 345A of the excess length portions 245, 345. The electric wires 45 constituting one of the excess length portions 245 are used to detect the voltage of each laminated battery (energy storage element), as in the first embodiment. The electric wires 45A constituting the other excess length portion 345 are connected to thermistors that detect the temperature of the laminated battery (energy storage element).

[0058] The slack storage compartment 157 has a plate-shaped bottom 157A disposed on the battery stack (energy storage element group) side and a plate-shaped wall 157B extending outward (forward) from the bottom 157A. Two inlets 257A3 and 357A3 are provided on the bottom 157A. The base 245B side of one slack portion 245 passes through one inlet 257A3, and the base 345B side of the other slack portion 345 passes through the other inlet 357A3. A first direction adjustment section 257C1 capable of adjusting the length of the slack portion 245 is erected on the bottom 157A near one slack portion 245, and a first direction adjustment section 357C1 capable of adjusting the length of the slack portion 345 is erected near the other slack portion 345. In addition, a second direction adjustment section 257C2 that can adjust the length of the excess length section 245 is erected on a wall section 157B that is erected near the entrance section 257A3, and a second direction adjustment section 357C2 that can adjust the length of the excess length section 345 is erected on a wall section 157B that is erected near the entrance section 357A3.

[0059] Protector 150 is also provided with holding portion 258 that holds tip portion 245A of excess length portion 245 and holding portion 358 that holds tip portion 345A of excess length portion 345. Each holding portion 258, 358 includes support portions 258A, 358A that include recesses 258A1, 358A1, respectively, and grip portions 258B, 358B that include a pair of plate portions 258B1, 358B1, respectively. Protector 150 is also provided with connector accommodating portion 159 that accommodates connector 248 from which tip portion 245A of excess length portion 245 is pulled out, and connector 348 from which tip portion 345A of excess length portion 345 is pulled out.

[0060] [Effects of Embodiment 2] According to the second embodiment, the following actions and effects are achieved. The protector 150 is provided with an excess length accommodating section 157 capable of accommodating the main body sections 245C, 345C of the two excess length sections 245, 345, and holding sections 258, 358 capable of holding the tip sections 245A, 345A of the excess length sections 245, 345, respectively.

[0061] With this configuration, the two slack portions 245, 345 can be housed together in the slack storage portion 157 with the tip portions 245A, 345A held by the holding portions 258, 358, respectively.

[0062] <Other embodiments> (1) In the first and second embodiments, the retaining portion holds the tip of the excess length portion in a detachable state, but this is not limited to this. In other embodiments, instead of the retaining portion that holds the tip of the excess length portion, a retaining portion that holds the connector in a detachable state may be provided on the protector.

[0063] (2) In the above-described first and second embodiments, the holding portion is composed of a pair of plate portions arranged to sandwich the tip of the excess length portion from above and below, but this is not limited thereto. There are no particular limitations on the holding portion as long as it can hold the tip of the excess length portion in a detachable manner.

[0064] (3) The main body of the excess length portion may be wrapped around the direction adjusting portion or folded back using the direction adjusting portion, and the main body of the excess length portion may be bent and accommodated in the excess length accommodating portion.

[0065] (4) The laminated batteries that make up the battery stack may be electrically connected to each other by a plurality of bus bars held by a protector. [Explanation of symbols]

[0066] 10,110: Battery module 11: Laminated battery (energy storage element) 11L: Battery stack (energy storage element group) 12: Electrode lead 12A: Connecting electrode lead 12B: Output electrode lead 13: Joint 14: Output section 15: Housing 15A: Bottom 15B: Ceiling 15C: Lateral part 20,120: Wiring module 30: Terminal 40: Busbar 40A: 1st part 40B: 2nd part 41: Busbar side connection 45: Electric wire 45a: One end 45b: The other end 48,248,348: Connector 48A: Housing 50,150: Protector 51: Protector body 52: Electrode receiving recess 52A: Connection electrode receiving recess 52B: Output electrode receiving recess 53: Busbar holder 55: Branch wiring section 56: Collective wiring section 57: Excess length storage section 57A: Bottom 57A3,257A3,357A3: Entrance section 57B: Wall 57C: Orientation adjustment section 57C1, 257C1, 357C1: First direction adjustment part 57C2, 257C2, 357C2: Second direction adjustment part 58: Holding part 59,159: Connector housing 145,245,345: Extra length 145A,245A,345A: Tip 145B,245B,345B: Base 145C,245C,345C: Main body

Claims

1. A wiring module attached to an energy storage element group in which a plurality of energy storage elements are arranged, A connector and A plurality of electric wires drawn out from the connector; an insulating protector attached to the energy storage element group while holding the plurality of electric wires; Each of the plurality of electric wires is formed by a portion where the electric wires are gathered in a bundle, and has an excess portion that can be extended from the protector side to the outside together with the connector, the excess length portion has a tip portion disposed on the connector side, a base portion positioned on the protector side, and a main body portion disposed between the tip portion and the base portion, The protector is a wiring module having an excess length accommodation section that accommodates the main body section in a removable state, and a holding section that holds the tip section or the connector in a removable state.

2. 2. The wiring module according to claim 1, wherein the excess length accommodation section includes a bottom section arranged on the side of the energy storage element group, a wall section extending outward from the bottom section, and an orientation adjustment section erected on at least one of the bottom section and the wall section, which contacts the main body section to adjust the orientation of the main body section so that the main body section is accommodated in a bent state.

3. The holding portion holds the tip portion in a detachable state, 3. The wiring module according to claim 1, wherein the protector has a recessed shape that opens outward from the energy storage element group side, and includes a connector accommodating portion in which the connector is detachably accommodated.

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