JP2018014297A - Wiring module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wiring module which allows for loading of a thermistor even after a cover was closed.SOLUTION: A wiring module 20 provided in a power storage element group 10 consisting of multiple power storage elements 11 having electrode terminals of positive and negative electrodes, includes an insulation protector 30 loaded to one side of the power storage element group 10, and provided with a bus bar housing section 32 where multiple bus bars 21 for connecting the adjoining electrode terminals are housed side by side in a line, and covers 50, 60 loaded for closing the bus bar housing section 32. On the outside of the loading area of the covers 50, 60 in the insulation protector 30, thermistor holding parts 100 capable of holding thermistors 90 for detecting temperature of the power storage elements 11 individually are provided in rows over the entire number of power storage elements 11 in such a form as arranged for each position corresponding to each power storage element 11.SELECTED DRAWING: Figure 6

Description

  The technique disclosed by this specification is related with a wiring module.

A battery module mounted on an electric vehicle or a hybrid vehicle is configured by connecting a plurality of single cells in series via a bus bar, and additionally includes means for detecting the temperature of the single cells.
As a specific example, one described in Japanese Patent Application Laid-Open No. 2014-191953 (the following Patent Document 1) is known. This is provided with an insulation protector mounted on the upper surface of the unit cell group as a wiring module, and electrode terminals of adjacent unit cells are connected to each other by a bus bar accommodated in a bus bar accommodating portion of the insulation protector.
On the other hand, the temperature detection of a single cell is usually performed for a plurality of predetermined single cells instead of the total number, and therefore a plurality of thermistors are connected to a bus bar at a predetermined position by fastening together, and then cover the bus bar and the thermistor. A cover is attached.

JP 2014-191953 A

By the way, in assembling the battery module using the wiring module as described above, depending on the circumstances, the electric connection process of the single cell group is once completed by connecting the single cells in series with the bus bar and attaching the cover. There was a demand for a new process for attaching the thermistor. However, it has been difficult for conventional wiring modules to meet such demands, and further improvements have been desired.
The technology disclosed in this specification has been completed based on the above situation.

  The technology disclosed in this specification is a wiring module provided in a power storage element group including a plurality of power storage elements having positive and negative electrode terminals, and is mounted on one surface of the power storage element group and adjacent to the electrode An insulation protector provided with a bus bar housing part in which a plurality of bus bars for connecting terminals are housed in a line, and a cover mounted to close the bus bar housing part, and in the insulation protector Outside the mounting region of the cover, a thermistor holding part capable of individually holding a thermistor for detecting the temperature of the power storage element is disposed at each position corresponding to each power storage element. The thermistor holding part row is provided over the entire number.

After connecting the storage element via the bus bar, the electrical connection process of the storage element group is once completed by closing the bus bar housing part with the cover, and at this time, all the thermistor holding parts are released from the cover and opened. . Therefore, in a subsequent process, a temperature detection system that detects the temperature of the corresponding power storage element by holding the thermistor in a predetermined thermistor holding part is constructed. That is, even after the cover is closed, the thermistor can be attached, and variations in the assembly process can be enhanced.
Further, the number of thermistors to be mounted and the mounting location can be arbitrarily selected. For example, by holding the thermistor in all the thermistor holding parts, it is possible to detect the temperature with high accuracy from all the power storage elements. It is possible to easily cope with a case where the power storage element whose temperature is to be detected is changed depending on the type of vehicle mounted.

The following configuration may also be used.
The cover is provided so as to be able to open and close via a hinge disposed on a side edge of the insulation protector, and a lock portion that locks the cover and locks the cover in a closed state includes the thermistor holding portion. Is provided outside.
Even after the cover is locked in the closed state, the function of holding the thermistor is secured for all the thermistor holding portions.

Between the bus bar housing part and the thermistor holding part row in the insulation protector, a wire wiring line in which a voltage detection line led out from each power storage element is routed to detect the voltage of each power storage element A groove is provided, and the cover can be closed together with the wire routing groove.
The cover can protect both the bus bar housed in the bus bar housing portion and the voltage detection line routed in the wire routing groove.

The said cover is divided | segmented into the cover for bus bars which closes the said bus-bar accommodating part, and the cover for electric wires which closes the said electric wire routing groove | channel, and can be opened and closed separately.
A bus-bar accommodating part and an electric wire routing groove can be opened / closed independently.

  According to the technology disclosed in this specification, a thermistor can be mounted even after the cover is closed, the variation of the assembly process can be increased, and the number and position of the thermistor mounted can be arbitrarily selected. Can be provided.

The perspective view in which the cover is in an open state before the thermistor of the wiring module according to the embodiment is mounted Front view of the wiring module in the same state Side view of the wiring module in the same state Perspective view of the wiring module with the cover closed Top view of the wiring module with the cover closed Plan view of wiring module with thermistor mounted Front view of wiring module with thermistor installed Rear view of wiring module with thermistor installed Enlarged side view of the wiring module with the thermistor attached Partial enlarged view of FIG. Partial enlarged view of FIG. Top view of wiring module with thermistor mounted in different modes

<Embodiment>
The embodiment will be described with reference to FIGS. The battery module M according to the present embodiment is mounted on a vehicle (not shown) such as an electric vehicle or a hybrid vehicle, and is used as a power source for driving the vehicle.
As shown in FIG. 1, the battery module M includes a unit cell group 10 (an example of a storage element group) in which a plurality of unit cells 11 (an example of a storage element) are arranged, and wiring is provided on the upper surface of the unit cell group 10. The module 20 is mounted.
In the following description, the left-right direction in FIG.

  The unit cell 11 has a flat, substantially rectangular parallelepiped shape, and a pair of positive and negative electrode terminals (not shown) project from the upper surface of the unit cell 11 and are arranged in two rows along the length direction of the unit cell group 10. It has been. The unit cells 11 are arranged so that adjacent electrode terminals have different polarities and constitute a unit cell group 10.

  The wiring module 20 is attached to the upper surface (electrode surface) of the unit cell group 10. As shown in FIG. 1, a plurality of bus bars 21 that connect electrode terminals of adjacent unit cells 11 and the bus bar 21 are connected. The voltage detection line 25 which detects the voltage of the cell 11 electrically connected, the thermistor 90 (refer FIG. 6) which detects the temperature of the cell 11, and the insulation protector 30 which mounts these are comprised. ing.

The bus bar 21 is formed in a substantially rectangular shape, for example, by pressing a plate made of aluminum or an aluminum alloy. The bus bar 21 is formed with a pair of through holes 22 for connecting to the electrode terminals of the unit cells 11.
The voltage detection line 25 is formed of a covered electric wire, and one end of the voltage detection line 25 is connected to a wire connection portion 23 provided on one long side edge of the bus bar 21, so that the other end of the voltage detection line 25 is connected to the bus bar. 21 is pulled out to the side.

  As shown in FIGS. 9 to 11, the thermistor 90 includes a block-shaped main body portion 91 in which elements are embedded, a pair of thermistor wires 92 drawn from the upper surface of the main body portion 91, and the periphery of the main body portion 91. And a casing 94 having a rectangular box shape with an open bottom surface. Details will be described later.

The insulation protector 30 is made of a synthetic resin, and as a whole, as shown in FIGS. It is formed in a flat rectangular parallelepiped shape having a slightly short width dimension and long in the left-right direction.
At positions close to the front edge and the rear edge of the insulating protector 30, bus bar accommodating portions 32 for accommodating a plurality of bus bars 21 in a line are formed in two lines in parallel with each other. .

  In the front and rear bus bar accommodating portions 32, the adjacent bus bars 21 are accommodated in a row in an insulated state. However, in the front and rear bus bar accommodating portions 32, the bus bars 21 are arranged with a half-pitch offset. Yes. The bus bar 21 is elastically pressed and held on the bottom surface by a pressing portion (not shown), and the back surface of the bus bar 21 is opened to the lower surface side through the opening on the bottom surface.

The front and rear bus bar accommodating portions 32 are each divided into two left and right via a partitioning portion 34 at the center in the length direction (left bus bar accommodating chamber 32L and right bus bar accommodating chamber 32R).
At both ends of the rear bus bar housing portion 32, mounting portions 36 for the external connection bus bar 24 for connecting the electrode terminals of the unit cell 11 and an external device (not shown) are provided.

Inside the front and rear bus bar housing portions 32, there are also parallel electric wire routing grooves 40 for routing the voltage detection line 25 drawn from the bus bar 21 in one direction so as to detect the voltage of the unit cell 11. And formed in two rows.
The left and right edges of the insulation protector 30 are respectively formed with a wire guide groove 42 in an orthogonal posture from the rear wire routing groove 40 to the formation region of the front bus bar housing portion 32. An inlet 43 communicating with the left and right ends of the front and rear wire routing grooves 40 is formed on the inner side wall of the guide groove 42, and the front end is an outlet 44. In this embodiment, the right wire guide groove 42 is used.

  As shown in FIG. 1, from the bus bar 21 accommodated in the front and rear bus bar accommodating portions 32, the other end of the voltage detection line 25 is drawn inward and inserted into the insertion groove provided on the side wall. Alternatively, after being inserted into the subsequent wire routing groove 40, the inside of each wire routing groove 40 is routed toward the right side of FIG. 1. The voltage detection lines 25 routed in the respective wire routing grooves 40 are routed in the right-side wire guide groove 42 while being bent at right angles through the inlet 43 and led out from the outlet 44 to the near side. A connector is connected to the other end of the derived voltage detection line 25 and is connected to an ECU (not shown).

  A plurality of thermistor holding portions 100 for individually holding the thermistors 90 are formed side by side at positions between the front and rear electric wire routing grooves 40. As shown in FIG. 4, each thermistor holding portion 100 has a structure in which a holding cylinder 102 on which a main body portion 91 of the thermistor 90 can be closely fitted from above is formed on a rectangular frame-like base 101. . The thermistor holding portions 100 are formed in a line in the left-right direction over the total number of the single cells 11 at positions corresponding to the single cells 11 constituting the single cell group 10 (thermistor holding portion row 100A). .

The thermistor 90 has a structure in which the main body 91 is assembled in the casing 94 as described above in part with reference to FIGS.
The casing 94 is formed in a rectangular box shape with an open lower surface that covers the holding cylinder 102 of the thermistor holding portion 100 from the upper surface. On the rear edge side of the upper surface of the casing 94, as shown in FIG. 10, a pressing portion 95 that elastically presses the rear edge portion of the upper surface of the main body 91 is provided, and on the rear surface side, as shown in FIG. As shown, an elastic lock piece 96 is provided that is elastically locked to a protrusion 103 provided on the rear wall of the holding cylinder 102 of the thermistor holding portion 100 to prevent it from coming off. Two insertion holes 98 through which the thermistor wire 92 drawn out from the main body portion 91 is inserted are opened at the center of the upper surface of the casing 94, and the main body portion 91 passes the pair of thermistor wires 92 from the insertion hole 98. It is assembled inside the casing 94 while being pulled out.

  As shown in FIG. 1, the insulating protector 30 includes a pair of a wire cover 50 for covering the wire routing groove 40 and a bus bar cover 60 for covering the bus bar housing portion 32 in two groups, front and rear. Is provided.

The electric wire cover 50 is a spine in which a pair of leg pieces 52 are formed extending from the left and right ends of the strip-like main body 51 covering the electric wire routing groove 40 toward the front edge or the rear edge of the insulating protector 30. A reinforcing leg 53 is formed to extend from the center length position of the main body 51.
The connecting portions 54 provided at the extending ends of the leg pieces 52 and the reinforcing legs 53 of the front and rear electric wire covers 50 are connected to the front edge or the rear edge of the insulating protector 30 via the first hinge 56, respectively. Has been. The electric wire cover 50 is rotatable about 180 degrees between the open position shown in FIG. 1 and the closed position shown in FIG.

In the front-side electric wire cover 50X, in the closed position, the left and right leg pieces 52X can be fitted inside the inner wall of the front region in the electric wire guide groove 42 (see FIG. 5). In addition, a first auxiliary electric wire cover 70 that covers the remaining portion of the front region of the electric wire guide groove 42 is provided on the outer wall of the electric wire guide groove 42 so as to be able to turn and open via an auxiliary hinge 71.
On the other hand, in the rear wire cover 50Y, a second auxiliary electric wire cover 72 that covers the rear region of the electric wire guide groove 42 and an auxiliary bus bar cover 74 that covers the external connection bus bar 24 are provided for the left and right leg pieces 52Y. ing.

  The lock structure for locking the wire cover 50 in the closed position is as follows. At the outer edge of the main body 51 of the front and rear electric wire covers 50, a plurality of (in the figure, 12) first lock pieces 80 are spaced at regular intervals in a posture protruding to the back side (upward on the paper surface in FIG. 1). Is formed. On the other hand, on the front surface and the rear surface of the base 101 in the above-described thermistor holding portion row 100A, a first lock receiving portion 81 for receiving and locking the first lock piece 80 of the front or rear wire cover 50 described above. Are provided correspondingly.

In addition, two first auxiliary lock pieces 82 are provided on the outer edge of the first auxiliary electric wire cover 70, and the leg pieces 52X of the front electric wire cover 50X receive the first auxiliary lock pieces 82. A first auxiliary lock receiving portion 83 is provided.
A second auxiliary lock piece 84 is provided on the outer edge of the second auxiliary electric wire cover 72 provided on the leg piece 52Y of the rear wire cover 50Y, and the outer wall in the rear region of the electric wire guide groove 42 is provided. On the outer surface, a second auxiliary lock receiving portion 85 that is fitted and locked to the second auxiliary lock piece 84 is provided.

The bus bar cover 60 is provided so as to form a pair with each of the front and rear electric wire covers 50 described above, and two bus bars are provided on the front and rear sides.
The left and right bus bar covers 60L, 60R have a flat plate shape that fits tightly inside the electric wire cover 50, and can cover the left bus bar housing portion 32L and the right bus bar housing portion 32R, respectively.

  The front left and right busbar covers 60L and 60R and the rear left and right busbar covers 60L and 60R have inner edges that are the same as the front or rear edge of the insulation protector 30, respectively. The two hinges 62 are rotatably connected. In other words, the two left and right bus bar covers 60L and 60R are rotatably provided independently of the mating wire cover 50. The left and right bus bar covers 60L and 60R can also be individually rotated.

  As shown in FIG. 1, the left and right bus bar covers 60L and 60R in the front and rear groups are respectively arranged in an open position that is flush with the inner side of the counterpart wire cover 50 in the open position, and in the closed position shown in FIG. Between the first hinge 62 and the second hinge 62.

  The lock structure for locking the bus bar cover 60 in the closed position is as follows. A plurality of (six in the figure) second lock pieces 86 project from the rear side (in FIG. 1, above the plane of the paper) on the outer edges of the two left and right bus bar covers 60L and 60R on the front or rear side. It is formed at regular intervals. On the other hand, the left and right bus bar accommodating portions 32L and 32R on the front side and the rear side are respectively provided with second lock receiving portions 87 for receiving and locking the above-described second lock pieces 86 on the inner surface of the inner wall. Yes.

Next, an example of a procedure for assembling the battery module M using the wiring module 20 of the present embodiment will be described.
First, the wiring module 20 is assembled. A predetermined bus bar 21 is prepared, one end of the voltage detection line 25 is connected to the electric wire connection portion 23 of each bus bar 21, and the other end is pulled out to the side of the bus bar 21.

  Next, the formed insulation protector 30 is prepared, and the bus bar 21 from which the voltage detection line 25 is drawn out as described above is accommodated in a predetermined position in the front and rear bus bar accommodating portions 32 as shown in FIG. Retained. The voltage detection lines 25 drawn from the bus bars 21 accommodated in the front bus bar accommodating portion 32 are routed toward the right side of the front side of the electric wire routing groove 40 in the same manner. The voltage detection line 25 drawn from each bus bar 21 accommodated in the bus bar accommodating portion 32 is led to the rear wire routing groove 40, and then the rear wire routing groove 40 is placed on the right side of FIG. Routed towards. The bundle of the front and rear voltage detection lines 25 is led to the right wire guide groove 42 and led together to the front side.

  As described above, when the housing of the bus bar 21 and the routing of the voltage detection line 25 are completed, the front and rear electric wire covers 50 are closed. As shown in FIGS. 4 and 5, the front and rear wire covers 50 in the open position are each rotated 180 degrees about the first hinge 56 to reach the closed position. The front or rear electric wire routing groove 40 is covered. At this time, the first lock piece 80 provided on the wire cover 50 is received and locked by the corresponding first lock receiving portion 81 provided on the front surface or the rear surface of the base 101 in the thermistor holding portion row 100A. Thus, the front and rear wire covers 50 are locked in the closed position.

  Further, as the front wire cover 50X is locked in the closed position, the left and right leg pieces 52X are in a state of being fitted inside the inner wall in the front region of the wire guide groove 42. When the electric wire cover 70 is rotated to the closed position around the auxiliary hinge 71, the first auxiliary lock piece 82 is received by the first auxiliary lock receiving portion 83, and as shown in FIG. 70 is locked in a state of covering the front region of the wire guide groove 42.

  On the other hand, when the rear wire cover 50Y is locked in the closed position, the second auxiliary wire cover 72 provided on the left and right leg pieces 52Y covers the rear region of the wire guide groove 42, and the second auxiliary lock piece. When 84 is received by the second auxiliary lock receiving portion 85, the second auxiliary electric wire cover 72 is locked in the closed position. In addition to the above, the auxiliary bus bar cover 74 covers the external connection bus bar 24.

  As described above, by closing the front and rear electric wire covers 50 and the first auxiliary electric wire cover 70, the right electric wire guide groove 42 communicating with the right and left electric wire arrangement grooves 40 from which the voltage detection lines 25 are arranged is connected. The voltage detection line 25 is covered with the main body 51 of the electric wire cover 50 and the first auxiliary electric wire cover 70 and the second auxiliary electric wire cover 72 on the right side, and is routed from the wire routing groove 40 and the wire guide groove 42. Is prevented from protruding.

The wiring module 20 is assembled in a state in which the front and rear wire covers 50 and the first auxiliary wire cover 70 are closed as described above, and is then carried into the assembly site of the battery module M in this state.
Although not shown, the carried wiring module 20 is positioned and placed on the upper surface of the unit cell group 10 with the front and rear bus bar covers 60 opened, and the bus bar 21 corresponding to the electrode terminal of the unit cell 11. Are sequentially fastened by a fastener (not shown) such as a nut, whereby the single cells 11 are connected in series.

When the electrical connection work for the single cell group 10 is completed in this way, the front and rear two bus bar covers 60 are closed. The bus bar covers 60L and 60R in the open position are each rotated 180 degrees around the second hinge 62, and are tightly fitted inside the front or rear wire cover 50 as shown in FIGS. The closed position is reached while being fitted to the cover, and the corresponding bus bar accommodating portions 32L and 32R are covered. At this time, the second lock piece 86 provided on the bus bar cover 60 is received and locked by the corresponding second lock receiving portion 87 provided on the inner wall of the bus bar accommodating portion 32, whereby each bus bar cover. 60L and 60R are locked in a state where the corresponding bus bar accommodating portions 32L and 32R are closed.
Thereby, the bus bar 21 and the fasteners accommodated in the front and rear bus bar accommodating portions 32 are covered and protected by the four bus bar covers 60 for convenience.

Next, the process of constructing the temperature detection system for the unit cell 11 is performed again. In the same process, the thermistor 90 is held by the thermistor holding part 100 provided at a position corresponding to the unit cell 11 to be temperature-detected among all the thermistor holding parts 100 provided in the insulation protector 30.
In this embodiment, as shown in FIG. 6, the thermistor 90 with respect to the thermistor holding portions 100 located at the first, fifth, ninth and twelfth positions from the left of the thermistor holding portions 100 in the twelve places. Is installed.

  The thermistor 90 is mounted from above so that the main body 91 is fitted into the holding cylinder 102 and the casing 94 is placed around the holding cylinder 102. When the lower surface of the main body portion 91 comes into contact with the upper surface of the corresponding unit cell 11, the elastic lock piece 96 on the rear surface of the casing 94 is elastically locked to the protrusion 103 on the rear wall of the thermistor holding portion 100 to prevent it from coming off. At this time, the pressing portion 95 on the upper surface of the casing 94 presses the main body portion 91 and is elastically pressed against the upper surface of the unit cell 11.

A pair of thermistor wires 92 drawn out from each thermistor 90 are bundled and routed, for example, in the right direction in FIG. 6, and a connector is connected to the tip thereof. By connecting the connector to the ECU, a temperature detection system for the unit cell 11 is constructed.
Thus, the assembly of the battery module M is completed.

  In the wiring module 20 of the present embodiment, the cell 11 is connected via the bus bar 21 in a state where the wire routing groove 40 is closed by the wire cover 50, and then the bus bar housing portion 32 is connected by the bus bar cover 60. Is closed once, and the electric connection process of the unit cell group 10 is once completed. At this time, all the thermistor holding parts 100 are detached from both covers 50 and 60 and are open. Therefore, a temperature detection system that detects the temperature of the corresponding unit cell 11 by holding the thermistor 90 in a predetermined thermistor holding unit 100 in the subsequent process is constructed. That is, the thermistor 90 can be mounted even after the covers 50 and 60 are closed, and variations in the assembly process of the battery module M can be enhanced.

Further, the number of thermistors 90 to be mounted and the mounting location can be arbitrarily selected. For example, when the unit cell 11 whose temperature is to be detected is changed depending on the type of vehicle mounted, it can be easily changed by simply mounting the thermistor 90 on the corresponding thermistor holding part 100.
Furthermore, as shown in FIG. 12, by holding the thermistor 90 in all the thermistor holding portions 100, it is possible to detect the temperature with high accuracy from all the unit cells 11.

  The first lock receiving portion 81 for locking the electric wire cover 50 arranged adjacent to the thermistor holding portion row 100A in the closed state is the front and rear surfaces of the base 101 in the thermistor holding portion 100, that is, the electric wire cover. Since the structure is provided outside the front and rear sides of the thermistor holding part 100 where 50 does not interfere, the function of holding the thermistor 90 is secured for all thermistor holding parts 100 even after the wire cover 50 is locked in the closed state. The

  Since the bus bar housing portion 32 is opened and closed independently by the bus bar cover 60 and the electric cable routing groove 40 by the electric wire cover 50, the voltage is applied when the wiring module 20 is transported to the installation site for the unit cell group 10. In order to prevent the detection line 25 from protruding from the electric wire arrangement groove 40, the electric wire arrangement groove 40 can be closed with the electric wire cover 50 first, which makes it easy to use.

<Other embodiments>
The technology disclosed in this specification is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope.
(1) The structure of the thermistor is not limited to that illustrated in the above embodiment, and may be another structure as long as the main body has a function of being held by the thermistor holding part while being pressed against the upper surface of the unit cell. .
(2) While the thermistor holding portion has a size extending over a plurality of single cells, the thermistor holding portion is partitioned into a plurality of holding chambers corresponding to each single cell, and the thermistors are individually held in the holding chambers. It may be a structure, and such a thing is also included in the technical scope.

(3) The cover for electric wires and the cover for bus bars may be integrated into a single cover, and the cover may be provided so as to be capable of rotating and opening via a hinge.
(4) Either one or both of the electric wire cover and the bus bar cover may be formed separately from the insulating protector.
(5) In the above embodiment, the single battery is exemplified as the power storage element, but a capacitor may be used.

10: Single cell group (electric storage element group)
11: Single cell (electric storage element)
20: Wiring module 21: Bus bar 25: Voltage detection line 30: Insulation protector 32, 32L, 32R: Bus bar accommodating portion 40: Wire routing groove 50, 50X, 50Y: Cover for electric wire 56: First hinge 60, 60L, 60R : Bus bar cover 62: Second hinge 80: First lock piece 81: First lock receiving part (lock part)
90: Thermistor 100: Thermistor holding part 100A: Thermistor holding part row

Claims (4)

A wiring module provided in a power storage element group composed of a plurality of power storage elements having positive and negative electrode terminals,
An insulation protector provided with a bus bar housing portion that is mounted on one surface of the power storage element group and accommodates a plurality of bus bars that connect adjacent electrode terminals in a row,
A cover mounted to close the bus bar accommodating portion,
And the thermistor holding | maintenance part which can hold | maintain the thermistor which detects the temperature of the said electrical storage element separately for every position corresponding to each said electrical storage element was arrange | positioned outside the mounting area | region of the said cover in the said insulation protector. The wiring module provided in the form in a thermistor holding part row over the total number of the power storage elements. The cover is provided so as to be able to open and close via a hinge disposed on a side edge of the insulation protector, and a lock portion that locks the cover and locks the cover in a closed state includes the thermistor holding portion. The wiring module according to claim 1, wherein the wiring module is provided outside of the wiring module. Between the bus bar housing part and the thermistor holding part row in the insulation protector, a wire wiring line in which a voltage detection line led out from each power storage element is routed to detect the voltage of each power storage element The wiring module according to claim 2, wherein a groove is provided, and the cover can be closed together with the wire routing groove. The wiring module according to claim 3, wherein the cover is divided into a bus bar cover that closes the bus bar housing portion and an electric wire cover that closes the electric wire routing groove and can be individually opened and closed.

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