JP2023156923A - Voltage detection unit and wire arrangement system - Google Patents

Abstract

To provide a voltage detection unit with excellent workability in conductive connection with a detection target.SOLUTION: A voltage detection unit 5 comprises: a voltage detection terminal 10 that is conductively connected with a detection target 4; an electric wire 20 that is conductively connected with the voltage detection terminal 10; a housing 40 that has a terminal accommodation recessed part 42 which accommodates the voltage detection terminal 10 and an electric wire accommodation recessed part 46 which accommodates the electric wire 20 and guides the electric wire 20 so as to lead it out toward the exterior; and a cover 30 that is attached to the housing 40 in a predetermined attachment direction so as to cover the voltage detection terminal 10 accommodated in the terminal accommodation recessed part 42. The cover 30 has a first plate part 31A and a second plate part 31B that have a line-symmetrical shape in a plate surface direction of the housing 40 orthogonal to the attachment direction, and is attached to the housing 40 so that one of the first and second plate parts covers the voltage detection terminal 10 accommodated in the terminal accommodation recessed part 42, and the other of the first and second plate parts is accommodated in a convex accommodation part 41 of the housing 40.SELECTED DRAWING: Figure 5

Description

The present invention provides a voltage detection unit configured such that a voltage detection terminal to be electrically connected to a detection target is accommodated in a plate-shaped housing, and an electric wire wiring for pulling out electric wires from the housing in a predetermined direction. Regarding the system.

Conventionally, a stacked power storage device is configured in which chargeable and dischargeable thin-plate power storage modules and conductive plates are alternately arranged and stacked repeatedly, thereby connecting multiple power storage modules in series via the conductive plates. is proposed. A power storage module used in this type of power storage device generally has a structure in which a plurality of battery cells are built-in, and functions as a single chargeable and dischargeable battery. One of the conventional power storage devices monitors the output status of each power storage module (i.e., the potential of the output surface of each power storage module relative to the reference zero potential; hereinafter also simply referred to as the "voltage of the power storage module"). In order to do this, a detection terminal such as a bus bar is connected to the conductive plate that is in contact with the output surface of each energy storage module, and the voltage of each energy storage module is measured via this detection terminal ( For example, see Patent Document 1).

Japanese Patent Application Publication No. 2020-161340

By the way, when actually connecting a bus bar or the like to the conductive plate in the power storage device having the above-described structure, since the power storage module and the conductive plate have a thin plate shape, other parts for connection (for example, It is difficult to secure space for installing bolts (for bolt fastening, etc.). Therefore, in the conventional power storage device described above, an insertion hole is provided at the side edge of the conductive plate for inserting the detection terminal, and each conductive plate is inserted from the side of the laminate in which the power storage module and the conductive plate are laminated. By inserting the detection terminal into the hole, the conductive plate and the detection terminal are connected. However, in this conventional connection method, when inserting the detection terminal, it is difficult to align the insertion hole of the conductive plate and the detection terminal, so it is difficult to improve the workability of the connection work.

One of the objects of the present invention is to provide a voltage detection unit with excellent workability in conductive connection with a detection target, and a wire routing system for drawing out wires in a predetermined direction from the housing of the voltage detection unit.

In order to achieve the above-mentioned object, the "voltage detection unit" according to the present invention has the following features.

A voltage detection terminal that will be electrically connected to the detection target,
an electric wire conductively connected to the voltage detection terminal;
a plate-shaped housing having a terminal accommodating recess in which the voltage detection terminal is accommodated, and an electric wire accommodating recess that accommodates the electric wire and guides it to be drawn out;
a cover attached to the housing along a predetermined attachment direction so as to cover the voltage detection terminal accommodated in the terminal accommodation recess;
The cover is
a first plate part and a second plate part having a line-symmetric shape in a plate surface direction that is perpendicular to the mounting direction and along a plate surface of the housing, and one of the first plate part and the second plate part; covers the voltage detection terminal accommodated in the terminal accommodation recess, and the other of the first plate part and the second plate part is accommodated in a concave accommodation part provided in the housing. attached to the housing,
Must be a voltage detection unit.

Furthermore, in order to achieve the above-mentioned object, the "wire routing system" according to the present invention has the following features.

A selection housing selected from a plurality of plate-shaped housings, a cover attached to the selection housing along a predetermined mounting direction, and an electric wire accommodated in the selection housing are used to An electric wire routing system for pulling out electric wires in a selected direction selected from a plurality of directions,
The first housing, which is the selected housing,
a first terminal accommodating recess for accommodating a first voltage detection terminal to be electrically connected to the detection target; and a first terminal accommodating recess for accommodating the electric wire to be electrically connected to the first voltage detection terminal and oriented in the selected direction. a first electric wire accommodating recess for guiding the electric wire to be pulled out in the direction;
The second housing, which is the selected housing,
a second terminal accommodating recess for accommodating a second voltage detection terminal to be conductively connected to the detection target; and a second terminal accommodating recess for accommodating the electric wire to be conductively connected to the second voltage detection terminal and facing the selected direction. a second electric wire accommodating recess for guiding the electric wire to be pulled out in the direction;
The cover is
a first plate part and a second plate part having a line-symmetrical shape in a plate surface direction perpendicular to the mounting direction and along the plate surface of the selection housing;
When using the first housing,
The first voltage detection terminal and the electric wire are housed in the first housing, one of the first plate part and the second plate part covers the first voltage detection terminal, and one of the first plate part and the second plate part covers the first voltage detection terminal. the cover is attached to the first housing such that the other of the second plate portions is accommodated in a concave first accommodating portion provided in the first housing;
When using the second housing,
The second voltage detection terminal and the electric wire are housed in the second housing, the other of the first plate part and the second plate part covers the second voltage detection terminal, and the first plate part and The cover is configured to be attached to the second housing such that the one of the second plate parts is accommodated in a concave second accommodating part provided in the second housing.
Must be a wiring system.

According to the voltage detection unit and wire routing system of the present invention, the voltage detection terminals (i.e., the first and second voltage detection terminals) to which the wires are connected are connected to the plate-shaped housings (i.e., the first and second housings). The electric wires accommodated in the terminal accommodating recesses (i.e., the first and second terminal accommodating recesses) and extending from the voltage detection terminals can be pulled out to the outside of the housing through the electric wire accommodating recesses (i.e., the first and second electric wire accommodating recesses). can. Thereby, the voltage detection terminal and the electric wire can be housed inside the voltage detection unit while making the voltage detection unit thinner (that is, having a plate-like outer shape). Furthermore, when electrically connecting the voltage detection unit to a detection target (for example, a conductive plate used in a stacked power storage device), for example, when the voltage detection unit is assembled to the detection target, the exposed voltage The detection terminal and the detection target can be fixed using techniques such as ultrasonic bonding and welding. As a result, compared to typical bolt connections, etc., there is no need for other parts for connection, and compared to the conventional connection method described above, it is easier to align the two and the contact resistance at the contact points is reduced. can be done. Therefore, the voltage detection unit and wire routing system of this configuration are excellent in workability in conductive connection with the detection target.

Furthermore, according to the voltage detection unit and wire routing system configured as described above, the cover includes the first plate portion and the second plate that are perpendicular to the mounting direction and have a line-symmetrical shape in the plate surface direction along the plate surface of the housing. has a department. When the cover is attached to the housing, one of the first plate part and the second plate part covers the voltage detection terminal accommodated in the terminal accommodation recess, and the other of the first plate part and the second plate part covers the voltage detection terminal accommodated in the terminal accommodation recess. It is accommodated in a concave accommodating portion provided in the housing. Therefore, for example, there is a housing (i.e., a selection housing) in which a voltage detection terminal is arranged at a position corresponding to the first plate part of the cover in order to pull out the electric wire in a predetermined direction (i.e., the first direction), and A housing (i.e., a selection housing) in which a voltage detection terminal is arranged at a position corresponding to the second plate part of the cover in order to draw out the electric wire in a direction different from that of the cover (i.e., a second direction); can be shared. Therefore, compared to the case where different types of covers are prepared for each direction in which the electric wires are pulled out, the number of parts constituting the voltage detection unit and the electric wire routing system can be reduced. As a result, it is possible to improve the productivity of the voltage detection unit and the wire routing system, and to reduce their manufacturing costs.

The present invention has been briefly described above. Further, details of the present invention will become clearer by reading the detailed description described below with reference to the accompanying drawings.

FIG. 1 is a partially exploded perspective view of a stacked power storage device including a voltage detection unit according to an embodiment of the present invention. 2(a) is a sectional view taken along the line AA in FIG. 1, and FIG. 2(b) is an enlarged view of section B in FIG. 2(a). FIG. 3 is a partially exploded perspective view of the conductive module shown in FIG. 1. FIG. 4 is an exploded perspective view of the voltage detection unit according to the embodiment of the invention shown in FIG. FIG. 5 is a top view showing a housing in which a voltage detection terminal and an electric wire are housed, and a cover. FIG. 6 is a bottom view showing the housing in which the voltage detection terminal and the electric wire are housed, and the cover. FIG. 7 is a top view showing a state in which the cover is locked to the housing at the temporary locking position. FIG. 8 is a top view showing a state in which the cover is locked to the housing at the final locking position. FIG. 9 is a sectional view taken along line CC in FIG. FIG. 10 is a sectional view taken along line DD in FIG. FIG. 11 is a diagram corresponding to FIG. 5 in the case of using a housing in which the electric wires are drawn out in the opposite direction. FIG. 12 is a diagram corresponding to FIG. 6 when the housing shown in FIG. 11 is used. FIG. 13 is a diagram corresponding to FIG. 8 when the housing shown in FIG. 11 is used.

<Embodiment>
Hereinafter, a voltage detection unit 5 according to an embodiment of the present invention and a wire routing system using the voltage detection unit 5 will be described with reference to the drawings. Hereinafter, for convenience of explanation, "front", "rear", "left", "right", "upper", and "lower" will be defined as shown in FIG. 1 and the like. The "front-back direction", the "left-right direction", and the "up-down direction" are orthogonal to each other.

Voltage detection unit 5 is typically used in stacked power storage device 1 shown in FIG. The power storage device 1 has rectangular thin plate-like chargeable/dischargeable power storage modules 2 and rectangular thin plate-like conductive modules 3 that can electrically connect between adjacent power storage modules 2, which are stacked alternately in the vertical direction. configured. In power storage device 1 , a plurality of power storage modules 2 are electrically connected in series via conductive modules 3 . The power storage module 2 has a structure in which a plurality of battery cells (not shown) are built in, and the power storage module 2 as a whole functions as one chargeable and dischargeable battery.

As shown in FIG. 1, the conductive module 3 is connected to a rectangular thin conductive plate 4 (the conductive plate 4 also has a function as a heat sink, as described later) and the right side of the conductive plate 4. The rectangular thin plate-shaped voltage detection unit 5 and the rectangular thin plate-shaped opposing unit 6 connected to the left side of the conductive plate 4 are configured to have a rectangular thin plate shape as a whole. As shown in FIGS. 1 to 3 (see especially FIG. 2(a)), the conductive plate 4 and the voltage detection unit 5 are connected to a flange portion 4a provided on the right end surface of the conductive plate 4 and extending in the front-rear direction. , and a recess 5a extending in the front-rear direction provided on the left end surface of the voltage detection unit 5 are fitted together, thereby being connected to each other. In the conductive plate 4 and the facing unit 6, a flange portion 4b provided on the left end face of the conductive plate 4 and extending in the front-back direction is fitted into a recess 6a provided on the right end face of the facing unit 6 and extending in the front-back direction. Therefore, they are connected to each other.

In each conductive module 3 located between vertically adjacent power storage modules 2, the conductive plate 4 is in direct contact with the upper and lower power storage modules 2, as shown in FIG. 2(a). Therefore, the conductive plate 4 has the function of providing electrical continuity between the lower surface of the upper power storage module 2 and the upper surface of the lower power storage module 2, and also functions as a heat sink that releases heat generated from the upper and lower power storage modules 2 to the outside. fulfill.

In each conductive module 3 located between vertically adjacent power storage modules 2, the voltage detection unit 5 includes a voltage detection terminal 10 (see FIG. 2, etc.), which will be described later and contacts the conductive plate 4. The voltage detection unit 5 detects the voltage between the upper and lower power storage modules 2 (specifically, the lower voltage with respect to the reference zero potential) via the electric wire 20 (see FIG. 1, etc.) connected to the voltage detection terminal 10. It functions to output a signal indicating the potential of the upper surface (output surface) of the power storage module 2 on the side. Although the voltage detection unit 5 is placed on the right side of the conductive plate 4 in FIGS. 1 to 3, a voltage detection unit having the same function as the voltage detection unit 5 may be placed on the left side of the conductive plate 4. In this case, as a voltage detection unit having the same function as the voltage detection unit 5, a voltage detection unit obtained by reversing the entire configuration of the voltage detection unit 5 left and right (that is, a mirror product of the voltage detection unit 5) is used.

In each conductive module 3 located between vertically adjacent power storage modules 2, the opposing unit 6 may be any one of a voltage detection unit, a dummy unit, and a temperature detection unit, depending on the specifications of the power storage device 1. one of them applies.

When the opposing unit 6 is a voltage detection unit, a voltage detection unit obtained by reversing the entire configuration of the voltage detection unit 5 left and right (that is, a mirror product of the voltage detection unit 5 described above) is used as the opposing unit 6. . In this case, the voltage detection unit 5 is placed on the right side of the conductive plate 4, and the mirror version of the voltage detection unit 5 is placed on the left side of the conductive plate 4. Opposing unit 6 (a mirror product of voltage detection unit 5) performs the same function as voltage detection unit 5.

When the facing unit 6 is a dummy unit, a simple resin plate having a recess 6a extending in the front-rear direction is used as the facing unit 6, as shown in FIG. In this case, the facing unit 6 only functions to fill the gap between the upper and lower power storage modules 2.

When the opposing unit 6 is a temperature detection unit, as shown in FIG. 1, the opposing unit 6 has a structure in which a temperature sensor 60 (thermistor) is incorporated in a resin plate used as a dummy unit. In this case, the facing unit 6 functions to output a signal indicating the temperature of the upper and lower power storage modules 2 via the electric wire 70 (see FIG. 1) connected to the temperature sensor 60.

The specific configuration of the voltage detection unit 5 according to the embodiment of the present invention will be described below with reference to FIGS. 4 to 13. As shown in FIGS. 1 and 3, the voltage detection unit 5 includes a selected housing selected from the housing 40 and the housing 40A, and a cover 30 attached to the selected housing. The housing 40A is a housing obtained by reversing the entire structure of the housing 40 (that is, a mirror version of the housing 40). The cover 30 can be attached to either the housing 40 or the housing 40A (see FIGS. 1 and 3).

As shown in FIGS. 1 and 3, when the housing 40 is used, the electric wire 20 is pulled out backward from the voltage detection unit 5, and when the housing 40A is used, the electric wire 20 is pulled out from the voltage detection unit 5 forward. In this respect, the voltage detection unit 5 uses a selection housing selected from a plurality of housings (housing 40 and housing 40A) to draw out the electric wire 20 in a selection direction selected from a plurality of directions (front and rear). It constitutes an electric wire routing system for the purpose.

Hereinafter, first, a case where the housing 40 is used as a selection housing to draw out the electric wire 20 rearward from the voltage detection unit 5 will be described with reference to FIGS. 4 to 10. When the housing 40 is used as the selected housing, the voltage detection unit 5 is connected to the housing 40, the voltage detection terminal 10 housed in the housing 40, and the voltage detection terminal 10 that is connected to the voltage detection terminal 10 and housed in the housing 40, as shown in FIG. and a cover 30 attached to the housing 40.

The voltage detection terminal 10 is accommodated in a later-described terminal accommodating recess 42 (see FIG. 4) formed in the housing 40, and the electric wire 20 is accommodated in a later-described electric wire accommodating recess 46 (see FIG. 4) formed in the housing 40. Then, the cover 30 is attached to a cover attachment recess 41 (see FIG. 4), which will be described later, formed in the housing 40. Hereinafter, each member constituting the voltage detection unit 5 will be explained in order.

First, the voltage detection terminal 10 will be explained. The metal voltage detection terminal 10 is formed by performing processing such as press working on a single metal plate. The voltage detection terminal 10 is accommodated in the terminal accommodation recess 42 of the housing 40 from above. As shown in FIG. 4, the voltage detection terminal 10 includes a first portion 11 in the shape of a rectangular flat plate extending in the front-rear direction, and a second portion 12 in the shape of a rectangular flat plate extending leftward from the front end of the first portion 11. As a whole, it has a flat plate-like shape having a substantially L-shape when viewed from the top and bottom.

One end portion of the electric wire 20 is fixed to the lower surface of the tip portion 11a (that is, the rear end portion) of the first portion 11 so as to be electrically connected thereto. The other end of the electric wire 20 will be connected to a voltage measuring device (not shown) outside the power storage device 1. A portion of the flange portion 4a of the conductive plate 4 is fixed to the lower surface of the tip portion 12a (i.e., the left end side end portion) of the second portion 12 by a method such as ultrasonic bonding or welding. (See Figure 2(b)).

A protrusion 13 that protrudes forward is formed on the front edge of the second portion 12 . When the voltage detection terminal 10 is housed in the housing 40, the protrusion 13 is locked in a locking groove 45 (see FIGS. 4 and 10) formed in the housing 40.

Next, the cover 30 will be explained. The cover 30 is a resin molded product, and is attached to the cover attachment recess 41 of the housing 40 from the right side. The cover 30 as a whole has a line-symmetrical shape in the front-rear direction. The cover 30 includes a front facing portion 31A, a rear facing portion 31B, and an extending portion 32 that connects the front facing portion 31A and the rear facing portion 31B in the front-rear direction. The front facing part 31A mainly functions to cover and protect the voltage detection terminal 10, and the rear facing part 31B and the extension part 32 mainly function to cover and protect the electric wire 20.

Since the entire cover 30 has a line-symmetrical shape in the front-back direction, the front facing part 31A and the rear facing part 31B located at both ends of the cover 30 in the front-back direction also have a line-symmetrical shape in the front-back direction. There is. Each of the front facing portion 31A and the rear facing portion 31B includes a pair of flat plate portions 33 of the same shape that face each other with an interval in the vertical direction, and the right edges of the pair of flat plate portions 33 extending in the front and back direction. and a connecting portion 34 that connects in the vertical direction. Each of the front facing portion 31A and the rear facing portion 31B has a substantially U-shape that opens to the left when viewed from the front-rear direction. Each flat plate part 33 is composed of a substantially square flat base part 33a connected to the connecting part 34, and a rectangular flat plate-like extension part 33b extending leftward from the central part of the base part 33a in the front-rear direction, and as a whole, It has a stepped band shape extending in the left-right direction.

The extending portion 32 is connected to the rear end edge of the upper flat plate portion 33 (more specifically, the base 33a) of the front facing portion 31A and the upper flat plate portion 33 (more specifically, It extends in the front-rear direction so as to connect flush with the front end edge of the base 33a), and has a substantially rectangular flat plate shape.

A wire holding piece 35 extending in the left-right direction is integrally formed in the extending portion 32 at a central position in the front-rear direction. As can be seen from FIG. 6, the wire holding piece 35 protrudes downward on the lower surface of the extension part 32, extends in the left-right direction, and projects further leftward from the left edge of the extension part 32. . When the cover 30 is attached to the housing 40, the wire holding piece 35 functions to hold the wire 20 housed in the housing 40.

For each of the front facing portion 31A and the rear facing portion 31B, the lower flat plate portion 33 (more specifically, the lower extending portion 33b) of the pair of flat plate portions 33 has an upper portion at a predetermined location. A locking portion 36 (see FIG. 6) is formed that projects upward toward the flat plate portion 33. The pair of locking portions 36 work together with a temporary locking portion 55 and a permanent locking portion 56 provided on the housing 40, which will be described later, to move the cover 30 to the temporary locking position (see FIG. 7). It performs the function of locking to the main locking position (see FIG. 8).

Next, the housing 40 will be explained. The housing 40 is a resin molded product, and has a substantially rectangular thin plate shape extending in the front-rear direction, as shown in FIGS. 1 and 3. A recess 5a that is recessed to the right and extends in the front-rear direction is formed on the left end surface of the housing 40. The flange portion 4a of the conductive plate 4 is fitted into the recess 5a (see FIG. 2, etc.).

A recessed cover mounting recess 41 having a shape corresponding to the overall shape of the cover 30 is formed at a location on the upper and lower surfaces of the housing 40 where the cover 30 is mounted (see FIG. 4). Since the entire cover 30 has a line-symmetric shape in the front-rear direction, the cover mounting recess 41 also has a line-symmetric shape in the front-rear direction. The depth of the recess (vertical depth) of the cover mounting recess 41 is equal to the thickness of the resin material forming the cover 30 (front and rear facing portions 31A, 31B+extending portion 32). Therefore, when the cover 30 is attached to the housing 40, the surface of the housing 40 and the surface of the cover 30 are flush with each other (see FIGS. 1, 9, etc.).

A terminal accommodating recess 42 having a shape corresponding to the overall shape of the voltage sensing terminal 10 and further recessed is formed at a location in the bottom surface 41a of the cover mounting recess 41 on the upper surface side of the housing 40 where the voltage sensing terminal 10 is accommodated. (See Figure 4). The recess depth (vertical depth) of the terminal accommodating recess 42 is equal to the plate thickness of the voltage detection terminal 10 . Therefore, when the voltage detection terminal 10 is attached to the housing 40, the top surface of the voltage detection terminal 10 and the bottom surface 41a of the cover attachment recess 41 are flush with each other.

At the left edge of the housing 40, at a position in the front-rear direction where the tip portion 12a of the voltage detection terminal 10 is arranged, a notch 43 that is recessed toward the right and has a substantially rectangular shape when viewed from the vertical direction is formed. A recess 5 a extending in the front-rear direction on the left end surface of the housing 40 is divided by a notch 43 . When the voltage detection terminal 10 is housed in the housing 40, the upper and lower surfaces of the tip portion 12a of the voltage detection terminal 10 are exposed through the notch 43 (see FIG. 7).

A recess 44 that is recessed downward and extends in the front-rear direction is formed at a location in the terminal accommodation recess 42 where the tip portion 11a of the voltage detection terminal 10 is disposed. When the voltage detection terminal 10 is housed in the housing 40, one end (contact) of the electric wire 20 connected to the voltage detection terminal 10 enters the recess 44 (see FIG. 5). In other words, the recessed portion 44 functions as a relief portion for avoiding interference between the bottom surface 42a of the terminal accommodating recess 42 and one end portion of the electric wire 20.

On the inner wall surface of the terminal housing recess 42 at the location where the projection 13 (see FIG. 4) of the voltage detection terminal 10 is arranged, there is a locking groove that is depressed forward and communicates with the recess 5a, corresponding to the projection 13. 45 (see FIGS. 4, 10, etc.).

The bottom surface 41a of the cover mounting recess 41 on the upper surface side of the housing 40 has a recessed electric wire accommodating shape having a shape corresponding to the wiring form of the electric wire 20 when the electric wire 20 is accommodated. A recess 46 is formed (see FIG. 4). The wire accommodating recess 46 has a pair of straight parts 47 extending in a straight line extending in the front-rear direction and spaced apart from each other in the front-rear direction, and a bent part 47 that connects the pair of straight parts 47 and extends while being bent so as to protrude to the right. This is a series of groove portions consisting of a portion 48 and a portion 48. The front end of the front straight part 47 of the pair of straight parts 47 communicates with the terminal accommodating recess 42 , and the rear end of the rear straight part 47 of the pair of straight parts 47 extends backward from the rear end edge of the housing 40 . A wire outlet 49 from which the wire 20 extends is formed. As described above, since the electric wire accommodating recess 46 has the bent portion 48, unintended external force is not applied to the electric wire 20 pulled out rearward from the housing 40, compared to the case where the electric wire accommodating recess 46 is composed of only the straight portion 47. However, the external force can be resisted by the friction between the bent portion 48 and the electric wire 20. Therefore, a large external force is unlikely to be applied to the contact point between the voltage detection terminal 10 and the electric wire 20.

A narrow recess 51, which is a recess having a narrower width (interval in the left-right direction) than the straight part 47, is provided in the vicinity of the boundary between the pair of straight parts 47 and the bent part 48, respectively. The width of the narrow recess 51 is slightly smaller than the outer diameter of the electric wire 20. Therefore, it functions to hold the electric wire 20 while pressing it in the left-right direction. By sandwiching the electric wire 20 between the pair of narrow recesses 51, even if an unintended external force is applied to the electric wire 20 pulled out from the housing 40, the external force can be resisted by the friction between the narrow recess 51 and the electric wire 20. can. Therefore, a large external force is unlikely to be applied to the contact point between the voltage detection terminal 10 and the electric wire 20. Furthermore, it is possible to strongly prevent the electric wire 20 from being routed so as to come off from the bending part 48 and straddling the bending part 48 (that is, shortcutting the bending part 48).

As shown in FIG. 4, in the bottom surface 41a of the cover attachment recess 41 on the upper surface side of the housing 40, at the location where the wire holding piece 35 of the cover 30 is arranged, there is a groove extending in the left-right direction corresponding to the wire holding piece 35, as shown in FIG. A wire holding piece recess 52 is formed. The wire holding piece recess 52 is arranged in front of the bending apex 48a (see FIG. 4) of the bending portion 48 of the wire accommodating recess 46. The bottom surface of the wire holding piece recess 52 is located above the bottom surface of the wire accommodating recess 46 .

The wire holding piece recess 52 extends in the left-right direction from the right edge of the upper surface of the housing 40, across the front straight portion 47 of the wire accommodating recess 46, to the left end inner wall 41b of the cover mounting recess 41 (see FIG. 5). ing. A storage hole 53 recessed toward the left is formed at a portion of the left-end inner wall 41b of the cover attachment recess 41 to which the wire holding piece recess 52 is connected (see FIGS. 4 and 10). When the cover 30 is attached to the housing 40, the extending end (that is, the left end) of the wire holding piece 35 of the cover 30 is inserted and stored in the storage hole 53.

As shown in FIG. 6, at each of the pair of positions in the front and back direction where the pair of locking portions 36 of the cover 30 are arranged, on the bottom surface 41a of the cover mounting recess 41 on the lower surface side of the housing 40, there is an upper portion. A contact portion 54, a temporary locked portion 55, and a permanent locked portion 56, which are recessed portions concave toward the front side, are arranged in this order from right to left at intervals. As shown in FIG. 6, the contact portion 54 is a concave portion continuous from the right edge of the housing 40. As shown in FIG. Each member constituting the voltage detection unit 5 has been described above.

Next, a procedure for assembling the voltage detection terminal 10 and the cover 30 to the housing 40 will be described. First, the voltage detection terminal 10 to which the electric wire 20 is connected in advance by a method such as ultrasonic bonding or welding is accommodated in the terminal accommodation recess 42 of the housing 40 . Therefore, the voltage detection terminal 10 is inserted into the terminal accommodation recess 42 of the housing 40 from above so that the protrusion 13 enters the locking groove 45 and one end (contact) of the electric wire 20 enters the recess 44. Fitted in. When the voltage detection terminal 10 is completely housed in the housing 40, the top and bottom surfaces of the tip 12a of the voltage detection terminal 10 are exposed through the notch 43.

Next, the electric wire 20 extending from the voltage detection terminal 10 housed in the housing 40 is housed in the electric wire accommodating recess 46 of the housing 40 . Therefore, the electric wire 20 is fitted from above along the electric wire accommodating recess 46 composed of a pair of straight portions 47 and a bent portion 48 . At this time, by pushing the pair of portions of the electric wire 20 located above the pair of narrow recesses 51 downward, the pair of portions of the electric wire 20 are housed inside the pair of narrow recesses 51 . When the electric wire 20 is completely housed in the housing 40, the electric wire 20 extends rearward from the electric wire outlet 49 to the outside of the housing 40.

Next, the cover 30 is attached to the housing 40. Therefore, the front facing part 31A and the rear facing part 31B of the cover 30 vertically sandwich the cover mounting recess 41 on the upper and lower surfaces of the housing 40, and the extending part 32 of the cover 30 is positioned on the upper surface of the housing 40. The cover 30 is inserted into the cover mounting recess 41 of the housing 40 from the right so as to cover the cover mounting recess 41 and so that the wire holding piece 35 of the cover 30 is accommodated in the wire holding piece recess 52 of the housing 40. It will be installed.

In the process of attaching the cover 30 to the housing 40, each of the pair of locking parts 36 of the cover 30 first comes into contact with the side surface of the abutting part 54 of the housing 40, and makes contact while sliding on the side surface. 54, and then enters the inside of the temporarily locked part 55, engages with the temporarily locked part 55, and is pressed against the left side surface of the temporarily locked part 55. As a result, the cover 30 is locked to the housing 40 at the temporary locking position, the attachment of the cover 30 to the housing 40 is completed (see FIG. 7), and the voltage detection unit 5 (see FIG. 3) is obtained. As will be described later, the voltage detection unit 5 obtained after the cover 30 has been completely attached to the housing 40 (with the cover 30 locked in the temporary locking position) is attached to the conductive module 3 (see FIG. (see).

When the cover 30 is locked in the temporary locking position, as shown in FIG. , covers most of the voltage detection terminal 10 other than the tip 12a, and a pair of upper and lower flat plate portions 33 of the rear facing portion 31B of the cover 30 covers a part of the cover mounting recess 41. The front facing portion 31A of the cover 30 (more specifically, the pair of upper and lower extension portions 33b) does not cover the tip portion 12a of the voltage detection terminal 10. Therefore, the upper and lower surfaces of the tip portion 12a of the voltage detection terminal 10 are still exposed through the notch 43.

Furthermore, the wire holding piece 35 of the cover 30 is placed over a portion of the opening of the straight portion 47 on the front side of the wire accommodating recess 46 . In addition, the upper flat plate portion 33 (more specifically, the extending portion 33b) of the rear facing portion 31B of the cover 30 is connected to a portion of the straight portion 47 and the bent portion 48 on the rear side of the wire accommodating recess 46. placed over the opening. These prevent the electric wire 20 from slipping out of the electric wire accommodation recess 46. Further, the extending end portion of the wire holding piece 35 is received in the storage hole 53. Thereby, unintended deformation such as displacement of the wire holding piece 35 or separation of the wire holding piece 35 from the wire accommodating recess 46 can be suppressed. Further, the extending portion 32 of the cover 30 is disposed over the opening of the bending apex 48a of the bending portion 48 of the electric wire accommodating recess 46. Thereby, it is possible to strongly prevent the electric wire 20 from slipping out of the electric wire accommodation recess 46 and being routed so as to straddle the bending part 48 (that is, shortcutting the bending part 48). In this manner, it is possible to reduce the possibility that a particular problem will occur due to the electric wire 20 coming out of the bent portion 48 of the electric wire accommodating recess 46. Further, the housing 40 is vertically sandwiched between the pair of upper and lower flat plate portions 33 of each of the front facing portion 31A and the rear facing portion 31B of the cover 30. Therefore, the cover 30 attached to the housing 40 is prevented from shifting in the vertical direction, and the state in which the voltage detection terminal 10 is properly covered with the cover 30 can be firmly maintained.

As described above, when the cover 30 is further pushed to the left with respect to the housing 40 while the cover 30 is locked in the temporary locking position, the extending end of the wire holding piece 35 of the cover 30 is retracted. While the cover 30 further enters and is stored in the hole 53, each of the pair of locking parts 36 of the cover 30 climbs over the temporary locking part 55, and then enters into the main locking part 56 and becomes the main locking part. It engages with the locked portion 56 (see FIG. 8). Thereby, the cover 30 is locked to the housing 40 at the final locking position.

When the cover 30 is locked in the main locking position, as shown in FIG. There is. This prevents the electric wire 20 from slipping out of the electric wire accommodation recess 46. Further, as shown in FIG. 8, the front facing portion 31A of the cover 30 (more specifically, the pair of upper and lower extension portions 33b) covers the upper and lower surfaces of the tip portion 12a of the voltage detection terminal 10. Thereby, the voltage detection terminal 10 is entirely covered by the front facing portion 31A of the cover 30, so that the voltage detection terminal 10 can be reliably protected.

As described above, the voltage detection unit 5 obtained after the cover 30 is completely attached to the housing 40 (with the cover 30 locked in the temporary locking position) is attached to the conductive module 3 (see FIG. 1). used for assembly. Specifically, as shown in FIG. 1, first, the flange portion 4a of the conductive plate 4 and the recess 5a of the voltage detection unit 5 are fitted, so that the voltage detection unit 5 is connected to the right side of the conductive plate 4. be done.

In this state, a portion of the flange portion 4a of the conductive plate 4 is arranged to overlap the lower side of the tip portion 12a of the voltage detection terminal 10 (see FIG. 2(b)), and the notch 43 of the housing 40 Due to the presence of , the upper surface of the tip portion 12a of the voltage detection terminal 10 is exposed upward, and the lower surface of a portion of the flange portion 4a of the conductive plate 4 is exposed downward.

Next, using the upper surface of the tip portion 12a of the voltage detection terminal 10 exposed upward and the lower surface of a part of the flange portion 4a of the conductive plate 4 exposed below, the tip portion 12a of the voltage detection terminal 10 and the conductive A part of the flange portion 4a of the plate 4 is fixed by a method such as ultrasonic bonding or welding. Thereafter, the cover 30 is moved from the temporary locking position to the final locking position, and the assembly of the voltage detection unit 5 and the conductive plate 4 is completed.

Next, the flange portion 4b of the conductive plate 4 and the recess 6a of the facing unit 6 are fitted, so that the facing unit 6 is connected to the left side of the conductive plate 4 on which the voltage detection unit 5 is assembled (see FIG. 2, etc.). reference). This completes the assembly of the conductive module 3.

The conductive module 3 thus obtained is used for assembling the power storage device 1 shown in FIG. Specifically, the power storage device 1 is obtained by vertically stacking the power storage modules 2 and the conductive modules 3 alternately, and fixing these stacked bodies with predetermined metal fittings or the like.

The case where the housing 40 is used as a selection housing to draw out the electric wire 20 rearward from the voltage detection unit 5 has been described above with reference to FIGS. 4 to 10. Next, with reference to FIGS. 11 to 13, a case will be described in which the housing 40A is used as the selected housing in order to draw out the electric wire 20 forward from the voltage detection unit 5.

In the case of using the housing 40A, parts corresponding to the parts in the case of using the housing 40 are given the same reference numerals as those given in the case of using the housing 40, and their descriptions will be omitted. However, for convenience of explanation, when using the housing 40A, the parts corresponding to the cover mounting recess 41, the terminal accommodating recess 42, the electric wire accommodating recess 46, and the voltage detection terminal 10 when using the housing 40 are respectively covered by the cover. These will be referred to as a mounting recess 41A, a terminal accommodating recess 42A, a wire accommodating recess 46A, and a voltage detection terminal 10A.

As described above, the housing 40A is a housing obtained by reversing the entire structure of the housing 40 (that is, a mirror version of the housing 40). Therefore, as can be understood from a comparison between FIGS. 5 and 6 and FIGS. 11 and 12, the cover mounting recess 41A of the housing 40A has a shape obtained by reversing the cover mounting recess 41 of the housing 40. (so-called mirror shape). As described above, since the cover mounting recess 41 has a line-symmetric shape in the front-rear direction, the cover mounting recess 41A having a mirror shape of the cover mounting recess 41 also has a line-symmetric shape in the front-rear direction. Therefore, the cover 30, which has a line-symmetric shape in the front-rear direction, can be attached from the right to either the cover attachment recess 41 of the housing 40 or the cover attachment recess 41A of the housing 40A (see FIGS. 8 and 13). ). In other words, one type of cover 30 can be shared both when using the housing 40 and when using the housing 40A.

The terminal accommodating recess 42A of the housing 40A also has a shape (so-called mirror shape) obtained by reversing the terminal accommodating recess 42 of the housing 40 from front to back (see FIG. 11). When using the housing 40A, a voltage detection terminal 10A having a shape corresponding to the terminal accommodating recess 42A is used instead of the voltage detection terminal 10 (see FIG. 11). The voltage detection terminal 10A is obtained by turning the voltage detection terminal 10 itself upside down in terms of front and back and top and bottom. That is, the voltage detection terminal 10A and the voltage detection terminal 10 are the same product that can be used in common, although their orientations during use are different.

The wire accommodating recess 46A of the housing 40A also has a shape (so-called mirror shape) obtained by reversing the wire accommodating recess 46 of the housing 40 (see FIG. 11). In the electric wire accommodating recess 46A consisting of a pair of straight portions 47 and bent portions 48, the rear end of the rear straight portion 47 communicates with the terminal accommodating recess 42A, and the front end of the front straight portion 47 connects to the front edge of the housing 40. A wire outlet 49 is formed from which the wire 20 extends forward.

Therefore, as shown in FIG. 11, when the voltage detection terminal 10A is accommodated in the terminal accommodation recess 42A of the housing 40A, and the electric wire 20 extending from the voltage detection terminal 10A is accommodated in the wire accommodation recess 46A of the housing 40A, The electric wire 20 extends forward from the electric wire outlet 49 to the outside of the housing 40A.

As explained above, when the housing 40A is used as the selected housing, the voltage detection unit 5 is connected to the housing 40A, the voltage detection terminal 10A accommodated in the terminal accommodation recess 42A of the housing 40A, and the voltage detection terminal 10A. The electric wire 20 is accommodated in the electric wire accommodating recess 46A of the housing 40A, and the cover 30 is attached to the housing 40A.

As described above, when the housing 40 is used as the selected housing to draw out the electric wire 20 rearward from the voltage detection unit 5, when the cover 30 is attached to the housing 40, as shown in FIGS. The front facing portion 31A of the cover 30 covers the voltage detection terminal 10, and the rear facing portion 31B of the cover 30 is accommodated in a part of the cover mounting recess 41 of the housing 40. On the other hand, when the housing 40A is used as the selected housing to draw out the electric wire 20 forward from the voltage detection unit 5, when the cover 30 is attached to the housing 40A, as can be understood from FIGS. 11 and 13, the cover The rear facing portion 31B of the cover 30 covers the voltage detection terminal 10A, and the front facing portion 31A of the cover 30 is accommodated in a part of the cover mounting recess 41A of the housing 40A.

<Action/Effect>
As described above, according to the voltage detection unit 5 and the electric wire wiring system using the voltage detection unit 5 according to the present embodiment, the voltage detection terminal 10 to which the electric wire 20 is connected is placed in the terminal accommodation recess 42 of the plate-shaped housing 40. The electric wire 20 extending from the voltage detection terminal 10 can be drawn out of the housing 40 through the electric wire accommodating recess 46 . Thereby, the voltage detection terminal 10 and the electric wire 20 can be stored inside the voltage detection unit 5 while making it thinner (that is, having a plate-like outer shape). Furthermore, when electrically connecting the voltage detection unit 5 to the conductive plate 4 used in the power storage device 1, for example, after the voltage detection unit 5 is assembled to the conductive plate 4, the exposed voltage detection terminal 10 and the conductive The plate 4 can be fixed using techniques such as ultrasonic bonding and welding. As a result, compared to typical bolt connections, etc., there is no need for other parts for connection, and compared to the conventional connection method described above, it is easier to align the two and the contact resistance at the contact points is reduced. can be done. Therefore, the voltage detection unit 5 according to the present embodiment has excellent workability in conductive connection with the conductive plate 4.

Furthermore, according to the voltage detection unit 5, the cover 30 has a front facing portion that is orthogonal to the mounting direction (left-right direction) and has a line-symmetrical shape in the plate surface direction (front-back direction) along the plate surface of the housings 40, 40A. 31A and a rear facing portion 31B. When attaching the cover 30 to the housing 40, the front facing part 31A covers the voltage detection terminal 10 accommodated in the terminal accommodating recess 42, and the rear facing part 31B covers the concave cover mounting recess 41 provided in the housing 40. be accommodated in. When the cover 30 is attached to the housing 40A, the rear facing part 31B covers the voltage detection terminal 10A accommodated in the terminal accommodating recess 42A, and the front facing part 31A covers the cover mounting recess 41A provided in the housing 40A. be accommodated in. Therefore, in order to draw out the electric wire 20 backward from the housing 40, the voltage detection terminal 10 is arranged at a position on the housing 40 corresponding to the front facing part 31A, and in other cases, to draw out the electric wire 20 in a forward direction from the housing 40A. The cover 30 can be shared both in the case where the voltage detection terminal 10A is arranged at the position on the housing 40A corresponding to the side facing part 31B. Therefore, the number of parts constituting the voltage detection unit 5 can be reduced compared to the case where different types of covers are prepared for each direction in which the electric wire 20 is pulled out. As a result, the productivity of the voltage detection unit 5 can be improved and manufacturing costs can be reduced.

Further, according to the voltage detection unit 5, when the cover 30 is attached to the housing 40, the front facing portion 31A covers the voltage sensing terminal 10, and the rear facing portion 31B is arranged over the opening of the wire accommodating recess 46. When the cover 30 is attached to the housing 40A, the rear facing portion 31B covers the voltage detection terminal 10A, and the front facing portion 31A is placed over the opening of the wire accommodating recess 46A. Therefore, when the cover 30 is attached, the electric wire 20 is prevented from slipping out from the electric wire accommodating recesses 46, 46A, so that the detached electric wire 20 can be prevented from interfering with the attachment of the cover 30. As a result, the productivity of the voltage detection unit 5 can be further improved.

Furthermore, according to the voltage detection unit 5, the housings 40, 40A are sandwiched between the pair of flat plate parts 33 of the front facing part 31A of the cover 30 in the plate thickness direction (vertical direction), and the rear facing part 31B of the cover 30 is The cover 30 is attached to the housing 40, 40A so that the pair of flat plate portions 33 sandwich the housing 40, 40A in the thickness direction (vertical direction). Therefore, the cover 30 attached to the housings 40, 40A is prevented from shifting in the thickness direction (vertical direction), and the state in which the voltage detection terminals 10, 10A are properly covered with the cover 30 is firmly maintained. Can be done.

Furthermore, according to the wire routing system from which the voltage detection unit 5 is obtained, the cover 30 is arranged in a direction perpendicular to the installation direction (left-right direction) and along the board surface of the selection housing (front-back direction). It has a front facing portion 31A and a rear facing portion 31B having symmetrical shapes. When the cover 30 is attached to the housing 40 that is the selected housing, the front facing part 31A covers the voltage detection terminal 10 accommodated in the terminal accommodating recess 42 of the housing 40, and the rear facing part 31B covers the voltage detection terminal 10 accommodated in the terminal accommodating recess 42 of the housing 40. The cover mounting recess 41 has a concave shape. When the cover 30 is attached to the housing 40A which is the selected housing, the rear facing part 31B covers the voltage detection terminal 10A accommodated in the terminal accommodating recess 42A of the housing 40A, and the front facing part 31A covers the voltage detection terminal 10A accommodated in the terminal accommodating recess 42A of the housing 40A. It is accommodated in a concave cover mounting recess 41A. Therefore, the cover 30 is shared both when the housing 40 is used to draw out the electric wire 20 backward from the voltage detection unit 5 and when the housing 40A is used to draw out the electric wire 20 forward from the voltage detection unit 5. can do. Therefore, compared to the case where different types of covers are prepared for each direction in which the electric wires 20 are pulled out, the number of parts constituting the electric wire routing system can be reduced. As a result, the productivity of the wire routing system can be improved and manufacturing costs can be reduced.

<Other aspects>
Note that the present invention is not limited to the above embodiments, and various modifications can be adopted within the scope of the present invention. For example, the present invention is not limited to the embodiments described above, and can be modified, improved, etc. as appropriate. In addition, the material, shape, size, number, arrangement location, etc. of each component in the above-described embodiments are arbitrary as long as the present invention can be achieved, and are not limited.

In the embodiment described above, the cover 30 is provided with a single wire holding piece 35. On the other hand, the cover 30 may be provided with a plurality of wire holding pieces 35 or may not be provided with the wire holding pieces 35.

Furthermore, in the embodiment described above, two narrow recesses 51 are provided in the wire receiving recesses 46, 46A of the housings 40, 40A. On the other hand, one narrow recess 51 may be provided in the wire accommodating recesses 46, 46A of the housings 40, 40A, three or more narrow recesses 51 may be provided, 51 may not be provided.

Here, the features of the embodiments of the voltage detection unit 5 and the wire routing system according to the present invention described above will be briefly summarized and listed below in [1] to [4].

[1]
A voltage detection terminal (10, 10A) that will be electrically connected to the detection target (4),
an electric wire (20) electrically connected to the voltage detection terminal (10, 10A);
A terminal accommodating recess (42, 42A) in which the voltage detection terminal (10, 10A) is accommodated, and an electric wire accommodating recess (46, 46A) that accommodates the electric wire (20) and guides it to be pulled out to the outside. A plate-shaped housing (40, 40A) having ,
a cover (30) attached to the housing (40, 40A) along a predetermined attachment direction so as to cover the voltage detection terminal (10, 10A) accommodated in the terminal accommodation recess (42, 42A); , comprising;
The cover (30) includes:
It has a first plate part (31A) and a second plate part (31B) having a line-symmetrical shape in a plate surface direction that is perpendicular to the mounting direction and along the plate surface of the housing (40, 40A), and One of the first plate part (31A) and the second plate part (31B) covers the voltage detection terminal (10, 10A) accommodated in the terminal accommodation recess (42, 42A), and The housing (40, 40A) is configured such that the other of the plate portion (31A) and the second plate portion (31B) is accommodated in a concave accommodating portion (41, 41A) provided in the housing (40, 40A). ) is attached to the
Voltage detection unit (5).

According to the voltage detection unit configured in [1] above, the voltage detection terminal to which the electric wire is connected is accommodated in the terminal accommodation recess of the plate-shaped housing, and the electric wire extending from the voltage detection terminal is passed through the electric wire accommodation recess to the outside of the housing. It can be pulled out. Thereby, the voltage detection terminal and the electric wire can be housed inside the voltage detection unit while making the voltage detection unit thinner (that is, having a plate-like outer shape). Furthermore, when electrically connecting the voltage detection unit to a detection target (for example, a conductive plate used in a stacked power storage device), for example, when the voltage detection unit is assembled to the detection target, the exposed voltage The detection terminal and the detection target can be fixed using techniques such as ultrasonic bonding and welding. As a result, compared to typical bolt connections, etc., there is no need for other parts for connection, and compared to the conventional connection method described above, it is easier to align the two and the contact resistance at the contact points is reduced. can be done. Therefore, the voltage detection unit with this configuration has excellent workability in conducting conductive connection with the detection target.

Furthermore, according to the voltage detection unit configured as described above, the cover includes the first plate part and the second plate part, which are perpendicular to the mounting direction and have a line-symmetrical shape in the plate surface direction along the plate surface of the housing. When the cover is attached to the housing, one of the first plate part and the second plate part covers the voltage detection terminal accommodated in the terminal accommodation recess, and the other of the first plate part and the second plate part covers the voltage detection terminal accommodated in the terminal accommodation recess. It is accommodated in a concave accommodating portion provided in the housing. Therefore, for example, there is a housing in which a voltage detection terminal is arranged at a position corresponding to the first plate part of the cover in order to draw out the electric wire in a predetermined direction, and a housing in which the voltage detection terminal is arranged in a position corresponding to the first plate part of the cover in order to draw out the electric wire in a direction different from the predetermined direction. The cover can be shared by both the housing and the housing in which the voltage detection terminals are arranged at positions corresponding to the two plate parts. Therefore, the number of parts constituting the voltage detection unit can be reduced compared to the case where different types of covers are prepared for each direction in which the electric wires are pulled out. As a result, it is possible to improve the productivity of the voltage detection unit and reduce its manufacturing cost.

[2]
In the voltage detection unit (5) described in [1] above,
The other of the first plate part (31A) and the second plate part (31B) is
disposed over the opening of the electric wire accommodating recess (46, 46A) when the cover (30) is attached;
Voltage detection unit (5).

According to the voltage detection unit having the configuration [2] above, by attaching the cover to the housing, one of the first plate part and the second plate part covers the voltage detection terminal, and the first plate part and the second plate part cover the voltage detection terminal. The other of the two plate portions is placed over the opening of the wire accommodating recess when the cover is attached. Therefore, by covering the voltage detection terminal, it not only protects the voltage detection terminal, but also prevents the wire from coming out of the wire accommodation recess when the cover is installed, thereby preventing the wire that has come out from interfering with the installation of the cover. It will be done. As a result, the productivity of the voltage detection unit can be further improved.

[3]
In the voltage detection unit (5) described in [1] above,
The cover (30) includes:
A first opposing plate part (33) facing the first plate part (33) in the thickness direction of the housing (40, 40A), and a second opposing plate part (33) facing the second plate part (33) in the thickness direction of the housing (40, 40A). a plate portion (33), the housing (40, 40A) is sandwiched between the first plate portion (33) and the first opposing plate portion (33) in the plate thickness direction; attached to the housing so that the second plate part (33) and the second opposing plate part (33) sandwich the housing (40, 40A) in the plate thickness direction;
Voltage detection unit (5).

According to the voltage detection unit having the configuration [3] above, by attaching the cover to the housing, the housing is sandwiched in the thickness direction between the first plate part and the first opposing plate part of the cover, and the second plate part of the cover The housing is sandwiched between the plate portion and the second opposing plate portion in the thickness direction. Therefore, the cover attached to the housing is prevented from shifting in the thickness direction, and the state in which the voltage detection terminal is appropriately covered with the cover can be firmly maintained.

[4]
A selection housing selected from a plurality of plate-shaped housings (40, 40A), a cover (30) attached to the selection housing along a predetermined mounting direction, and an electric wire (20) housed in the selection housing. An electric wire routing system for pulling out the electric wire (20) from the selection housing in a selected direction selected from a plurality of directions, using
The first housing (40), which is the selected housing,
a first terminal accommodating recess (42) in which a first voltage detection terminal (10) to be electrically connected to the detection target (4) is accommodated; a first electric wire accommodating recess (46) that accommodates the electric wire (20) and guides the electric wire (20) to be pulled out in a first direction (rearward direction) that is the selected direction;
The second housing (40A), which is the selected housing,
a second terminal accommodating recess (42A) in which a second voltage detection terminal (10A) to be electrically connected to the detection target (4) is accommodated; a second electric wire accommodating recess (46A) that accommodates the electric wire (20) and guides the electric wire (20) to be drawn out in a second direction (forward) that is the selected direction;
The cover (30) includes:
a first plate part (31A) and a second plate part (31B) having a line-symmetrical shape in a plate surface direction perpendicular to the mounting direction and along the plate surface of the selection housing;
When using the first housing (40),
The first voltage detection terminal (10) and the electric wire (20) are housed in the first housing (40), and one of the first plate part and the second plate part (31A) is the first voltage detection terminal. (10), and the other (31B) of the first plate part and the second plate part is accommodated in a concave first accommodating part (41) provided in the first housing (40). , the cover (30) is attached to the first housing (40),
When using the second housing (40A),
The second voltage detection terminal (10A) and the electric wire (20) are housed in the second housing (40A), and the other (31B) of the first plate part and the second plate part is used to detect the second voltage. The terminal (10A) is covered, and the one (31A) of the first plate part and the second plate part is accommodated in a concave second accommodating part (41A) provided in the second housing (40A). The cover (30) is attached to the second housing (40A),
Electrical wiring system.

According to the electric wire wiring system having the configuration [4] above, the voltage detection terminals (i.e., the first and second voltage detection terminals) to which the electric wires are connected are connected to the plate-shaped selection housings (i.e., the first and second housings). ) is accommodated in the terminal accommodating recess (i.e., the first and second terminal accommodating recesses), and the electric wire extending from the voltage detection terminal is pulled out to the outside of the housing through the electric wire accommodating recess (i.e., the first and second electric wire accommodating recesses). I can do it. Thereby, the voltage detection terminal and the electric wire can be housed inside the voltage detection unit obtained by the electric wire routing system while making it thinner (that is, having a plate-like outer shape). Furthermore, when electrically connecting the voltage detection unit to a detection target (for example, a conductive plate used in a stacked power storage device), for example, when the voltage detection unit is assembled to the detection target, the exposed voltage The detection terminal and the detection target can be fixed using techniques such as ultrasonic bonding and welding. As a result, compared to typical bolt connections, etc., there is no need for other parts for connection, and compared to the conventional connection method described above, it is easier to align the two and the contact resistance at the contact points is reduced. can be done. Therefore, the voltage detection unit obtained by the wire wiring system of this configuration has excellent workability in conductive connection with the detection target.

Furthermore, according to the wire routing system configured as described above, the cover includes the first plate part and the second plate part which are perpendicular to the mounting direction and have a line-symmetrical shape in the plate surface direction along the plate surface of the housing. When the cover is attached to the housing, one of the first plate part and the second plate part covers the voltage detection terminal accommodated in the terminal accommodation recess, and the other of the first plate part and the second plate part covers the voltage detection terminal accommodated in the terminal accommodation recess. It is accommodated in a concave accommodating portion provided in the housing. Therefore, for example, a housing (i.e., a selection housing) in which a voltage detection terminal is disposed at a position corresponding to the first plate part of the cover in order to pull out the electric wire in a predetermined direction (i.e., the first direction), and A housing (i.e., a selection housing) in which a voltage detection terminal is arranged at a position corresponding to the second plate part of the cover for drawing out the electric wire in a direction different from that of the cover (i.e., a second direction); can be shared. Therefore, compared to the case where different types of covers are prepared for each direction in which the wires are pulled out, the number of parts constituting the wire routing system can be reduced. As a result, it is possible to improve the productivity of the wire routing system and reduce its manufacturing cost.

4 Conductive plate (detection target)
5 Voltage detection unit 10 Voltage detection terminal (voltage detection terminal, first voltage detection terminal)
10A voltage detection terminal (voltage detection terminal, second voltage detection terminal)
20 Electric wire 30 Cover 31A Front facing part (first plate part)
31B Rear side facing part (second plate part)
33 Flat plate part (first plate part, second plate part, first opposing plate part, second opposing plate part)
40 Housing (housing, first housing)
40A housing (housing, second housing)
41 Cover mounting recess (accommodating part, first accommodating part)
41A Cover mounting recess (accommodating part, second accommodating part)
42 Terminal accommodating recess (terminal accommodating recess, first terminal accommodating recess)
42A Terminal accommodating recess (terminal accommodating recess, second terminal accommodating recess)
46 Wire accommodating recess (wire accommodating recess, first wire accommodating recess)
46A Wire accommodating recess (wire accommodating recess, second wire accommodating recess)

Claims (4)

A voltage detection terminal that will be electrically connected to the detection target,
an electric wire conductively connected to the voltage detection terminal;
a plate-shaped housing having a terminal accommodating recess in which the voltage detection terminal is accommodated, and an electric wire accommodating recess that accommodates the electric wire and guides it to be drawn out;
a cover attached to the housing along a predetermined attachment direction so as to cover the voltage detection terminal accommodated in the terminal accommodation recess;
The cover is
a first plate part and a second plate part having a line-symmetric shape in a plate surface direction that is perpendicular to the mounting direction and along a plate surface of the housing, and one of the first plate part and the second plate part; covers the voltage detection terminal accommodated in the terminal accommodation recess, and the other of the first plate part and the second plate part is accommodated in a concave accommodation part provided in the housing. attached to the housing,
Voltage detection unit. The voltage detection unit according to claim 1,
The other of the first plate portion and the second plate portion is
disposed over the opening of the wire accommodating recess when the cover is attached;
Voltage detection unit. The voltage detection unit according to claim 1,
The cover is
a first opposing plate portion facing the first plate portion in the thickness direction of the housing; and a second opposing plate portion facing the second plate portion in the thickness direction of the housing; Mounted on the housing so that the first opposing plate part sandwiches the housing in the thickness direction, and the second plate part and the second opposing plate part sandwich the housing in the thickness direction. be done,
Voltage detection unit. A selection housing selected from a plurality of plate-shaped housings, a cover attached to the selection housing along a predetermined mounting direction, and an electric wire accommodated in the selection housing are used to An electric wire routing system for pulling out electric wires in a selected direction selected from a plurality of directions,
The first housing, which is the selected housing,
a first terminal accommodating recess for accommodating a first voltage detection terminal to be electrically connected to the detection target; and a first terminal accommodating recess for accommodating the electric wire to be electrically connected to the first voltage detection terminal and oriented in the selected direction. a first electric wire accommodating recess for guiding the electric wire to be pulled out in the direction;
The second housing, which is the selected housing,
a second terminal accommodating recess for accommodating a second voltage detection terminal to be conductively connected to the detection target; and a second terminal accommodating recess for accommodating the electric wire to be conductively connected to the second voltage detection terminal and facing the selected direction. a second electric wire accommodating recess for guiding the electric wire to be pulled out in the direction;
The cover is
a first plate part and a second plate part having a line-symmetrical shape in a plate surface direction perpendicular to the mounting direction and along the plate surface of the selection housing;
When using the first housing,
The first voltage detection terminal and the electric wire are housed in the first housing, one of the first plate part and the second plate part covers the first voltage detection terminal, and one of the first plate part and the second plate part covers the first voltage detection terminal. the cover is attached to the first housing such that the other of the second plate portions is accommodated in a concave first accommodating portion provided in the first housing;
When using the second housing,
The second voltage detection terminal and the electric wire are housed in the second housing, the other of the first plate part and the second plate part covers the second voltage detection terminal, and the first plate part and The cover is configured to be attached to the second housing such that the one of the second plate parts is accommodated in a concave second accommodating part provided in the second housing.
Electrical wiring system.

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