JP2019213377A - Protective device - Google Patents

Abstract

To suppress incorrect connection of connector.SOLUTION: A protective device comprises a main protective apparatus 3 provided for each battery module 110 including multiple battery cells 121, and routing and holding an electrical wire 152 pulled out from a battery state detection sensor 151 for the battery cells 121, a sub-protective apparatus 4 placed at the adjacent position of two adjoining battery modules 110 arranged in parallel, routing and holding the electrical wire 152, routed to the adjacent position, on the outside of the battery module 110, and holding the mating connector 170 becoming the mating object of the connector 154 of the terminal of the electrical wire 152, and a path regulation body 80 placed at the adjacent position, and regulating the path of the electrical wire 152 up to the mating connector 170, for each electrical wire 152 routed up to the adjacent position by an alternative pathway.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a protection device.

  Conventionally, a vehicle such as an electric vehicle or a hybrid vehicle is equipped with a battery pack for supplying power to a rotating machine serving as a driving source or charging regenerative power generated by the rotating machine. Yes. The battery pack includes a battery module in which a plurality of battery cells are arranged and electrically connected via a conductive member. In this type of vehicle, the battery state (temperature, voltage, etc.) of the battery cell is monitored in order to perform stable charge / discharge control of the battery module. The protection device protects and holds the battery state detection sensor and the electric wire. The electric wire is connected to the connector outside the battery module and the protector. Patent Documents 1 and 2 below disclose techniques related to such electric wires and protection devices.

JP 2015-223054 A Japanese Patent Laying-Open No. 2015-56910 JP 2014-232656 A

  By the way, in a battery pack, productivity and quality can be improved by preventing erroneous connection of the connector. In the above-mentioned Patent Document 3, a plurality of electric wires that have been routed in the same route are branched in two directions by a regulating rib, thereby guiding a plurality of combinations of electric wires and voltage detection terminals in each direction. The technique of, is disclosed. In such a technique, since there are a plurality of voltage detection terminals in each direction after branching, there is room for improvement from the viewpoint of erroneous connection of the voltage detection terminals.

  Therefore, an object of the present invention is to provide a protection device capable of suppressing erroneous connection of connectors.

  In order to achieve the above object, the present invention provides a battery module that is provided for each battery module having a plurality of battery cells, and routes and holds an electric wire drawn from a battery state detection sensor for detecting a battery state of the battery cell. Arranging at a position adjacent to the two battery modules adjacent to each other in a protective device, and arranging and holding the electric wire routed up to the adjacent position outside the battery module; A sub-protector that holds the mating connector to be fitted to the connector of the terminal of the electric wire, and arranged at the adjacent position, and for each electric wire that has been routed by another path to the adjacent position, And a path regulating body that regulates a path to the mating connector.

  Here, the path regulation body guides the electric wires routed to another position to the adjacent position toward the mating connector to be fitted to the connector of each terminal, and 2 It is desirable to form so that one said connector may restrict | limit the path | route of each said electric wire so that it cannot fit in the said other party connector opposite to its fitting object.

  In addition, it is preferable that the path regulation body has a plurality of plate-like wall portions that are opposed to each other with a space in the arrangement direction of the two adjacent battery modules.

  Further, in the path regulating body, the wall parts of the peripheral parts are disposed opposite to each other in the arrangement direction between the two wall parts adjacent to each other in the arrangement direction. Further, it is desirable to form the gap between the two wall portions adjacent in the arrangement direction.

  A first main protector for routing and holding the first electric wire drawn from the first battery state detection sensor for detecting the first battery state of the battery cell; and for detecting the second battery state of the battery cell. A second main protector for routing and holding the second electric wire drawn out from the second battery state detection sensor inside the battery module, as the main protector, It is desirable to form the second electric wire as the electric wire drawn outward from the battery module at an adjacent position so as to be guided to the mating connector together with the connector.

  In addition, it is preferable that a connecting member that connects the held bodies of the two adjacent first main protectors is provided at the adjacent position, and the path regulating body is provided on the connecting member.

  The protection device according to the present invention includes a path regulation body that regulates a path to the mating connector of each electric wire that has been routed to another position adjacent to two adjacent battery modules by another path. . Therefore, this protective device can suppress erroneous connection of each connector to the counterpart connector.

FIG. 1 is a perspective view showing a protection device assembled to a battery module. FIG. 2 is a side view showing the protection device assembled to the battery module. FIG. 3 is a top view showing the protection device assembled to the battery module. FIG. 4 is an exploded perspective view of the protection device. FIG. 5 is an enlarged view of a portion A in FIG. FIG. 6 is a top view of the battery module as viewed from the opening side of the housing. 7 is a cross-sectional view taken along line X1-X1 of FIG. 8 is a cross-sectional view taken along line X2-X2 of FIG. FIG. 9 is a perspective view of the protective device to which the temperature detecting device is assembled as seen from another angle. FIG. 10 is an exploded perspective view of the protective device before the temperature detector is assembled. FIG. 11 is a partially enlarged view for explaining the temperature sensor and the sensor holding body. FIG. 12 is an enlarged view of a portion B in FIG. 13 is a cross-sectional view taken along line X2-X2 of FIG. FIG. 14 is a partially enlarged view illustrating the main line arrangement body and the main line cover body. FIG. 15 is a partially enlarged view illustrating the guide routing body and the guide cover body. FIG. 16 is an enlarged view of a portion C in FIG. FIG. 17 is a plan view for explaining the relationship between the upper-layer side path regulation body and the second electric wire. FIG. 18 is a plan view for explaining the relationship between the lower-layer side path regulation body and the second electric wire. FIG. 19 is a perspective view for explaining the relationship between the path regulation body on the lower layer side and the auxiliary protector.

  Hereinafter, embodiments of a protection device according to the present invention will be described in detail with reference to the drawings. In the following, after describing the outline of the protection device according to the present invention, a specific embodiment of the protection device will be described. The present invention is not limited by the embodiment.

  As will be described in detail later, the protection device according to the present invention is provided in a battery pack including a battery state detection tool for each battery module, and protects at least the electric wires included in the battery state detection tool. The battery pack will be briefly described.

  1 to 5 indicates an example of the battery pack. The battery pack 100 includes a plurality of battery modules 110 (FIGS. 1 to 5). The battery module 110 includes at least one battery cell group 120 and a housing 130 that houses the battery cell group 120 (FIGS. 6 to 8). In this exemplary battery module 110, a plurality of battery cell groups 120 are accommodated in a housing 130. For example, in the battery pack 100, the plurality of battery modules 110 are arranged in parallel with the orientation of the following opening 131 a, or the orientation of the openings 131 a of the plurality of battery modules 110 is aligned, and then the opening 131 a side of the battery module 110. Other battery modules 110 are stacked and arranged. The illustrated battery pack 100 includes at least two combinations of two battery modules 110 arranged in parallel, and the combinations are stacked.

  The battery cell group 120 is an aggregate of battery cells 121 (FIGS. 7 and 8) having positive and negative electrode terminals (not shown), and the plurality of arranged battery cells 121 are electrically conductive members 125 (FIGS. 6 to 6). 8) and is electrically connected.

  The battery cell 121 has, for example, a cell body (not shown) formed in a rectangular parallelepiped shape or a cylindrical shape. In the rectangular parallelepiped battery cell 121, for example, positive and negative electrode terminals are arranged on one wall surface of the cell body, or positive and negative electrode terminals are respectively arranged on two oppositely arranged wall surfaces of the cell body. ing. Further, in the cylindrical battery cell 121, positive and negative electrode terminals are respectively arranged at both ends in the axial direction. Here, it is assumed that cylindrical battery cells 121 are used.

  The conductive member 125 is formed of a conductive material such as metal. For example, the conductive member 125 is formed into a plate shape using a metal plate as a base material. The conductive member 125 electrically connects the electrode terminals of the plurality of battery cells 121 forming the battery cell group 120. For example, the conductive member 125 and the electrode terminal are physically and electrically connected to each other by welding or the like.

  The housing 130 is formed of an insulating material such as synthetic resin. The illustrated case 130 includes a main housing box 131 (FIGS. 1 and 6 to 8). The storage box 131 is formed as a substantially rectangular parallelepiped box with five walls and has one substantially rectangular opening 131a (FIGS. 6 to 8). The battery cell group 120 is housed in the space inside the housing box 131 through the opening 131a.

  The housing 130 includes a cover 132 that closes the opening 131a while leaving a part of the opening 131a (FIGS. 1 and 6 to 8). That is, in the housing 130, a part of the opening 131a that is not blocked by the cover 132 is an exposure port 131b (FIGS. 6 and 8). The illustrated cover 132 is formed into a substantially rectangular plate shape. The exposure port 131b is arranged along one side of the cover 132. Here, the exposure port 131b is arranged along one of the two sides orthogonal to the parallel arrangement direction of the battery modules 110.

  In this housing 130, the cover 132 is assembled to the storage box 131 so as to close the opening 131a while leaving a part of the opening 131a. The housing 130 is provided with a holding mechanism (not shown) for maintaining the assembled state between the storage box 131 and the cover 132.

  The battery pack 100 including the battery module 110 includes a battery state detector for detecting the state of the battery cell 121 (so-called battery state). The battery state detection tool includes a battery state detection sensor (hereinafter referred to as “battery state detection sensor”) and an electric wire drawn from the battery state detection sensor. In this battery state detection tool, a battery state detection sensor corresponding to the battery state to be detected is provided. This battery state detector will be described in detail later. The protection device according to the present invention protects at least the electric wires included in the battery state detection tool.

  The protection device includes a main protector provided for each battery module 110. The main protector protects at least the electric wire drawn from the battery state detection sensor, and routes and holds the electric wire.

  Further, the protection device includes a sub-protection tool arranged at an adjacent position between two adjacent battery modules 110 arranged in parallel. The auxiliary protector is used to route and hold an electric wire that has been routed to the adjacent position outside the battery module 110 and to hold a mating connector that is a fitting target of the connector at the end of the electric wire. is there.

  Here, the mating connector is provided for every two adjacent battery modules 110. In addition, the sub protector may be provided for every two adjacent battery modules 110 or may be provided so as to be shared by the two adjacent battery modules 110. In the former case, the sub-protector arranges and holds the electric wire of the battery module 110 to which it corresponds, and holds the counterpart connector to be fitted to the connector of the terminal of this electric wire. In the latter case, the sub-protector arranges and holds the respective electric wires of the two adjacent battery modules 110 and holds each counterpart connector to be fitted to the connector of the terminal of each electric wire. In any case, the secondary protector is arranged in the direction in which the mating connector of each battery module 110 is centered on the boundary between the two adjacent battery modules 110 (the direction in which the two adjacent battery modules 110 are aligned). And are formed so as to be held at substantially the same position. In the former case, each of the sub-protectors is formed so as to be the holding position of such a counterpart connector. In the latter case, the auxiliary protector is formed so as to be such a holding position of the counterpart connector. In the specific example described later, this latter case is illustrated.

  Furthermore, the protection device includes a path regulation body disposed at an adjacent position between two adjacent battery modules 110. The path regulating body regulates the path to the counterpart connector of the electric wire for each electric wire that has been routed to another adjacent position. The electric wire that has been routed to another adjacent position is an electric wire included in the battery state detection tool for each battery module 110. By providing this path regulating body, the protection device can suppress erroneous connection of the connector of each electric wire to the counterpart connector.

  Here, the path regulating body guides each electric wire routed in a different path to the adjacent position of the two adjacent battery modules 110 toward the mating connector to be fitted to the connector of each terminal. At the same time, it is desirable to form the two connectors so as to restrict the paths of the respective wires so that the two connectors cannot be mated with the mating connector opposite to the mating target.

  For example, the path regulation body interferes with one of the respective wires that have been routed to another adjacent position, and the connector of this one wire becomes the mating connector of the connector of the other wire. It is formed so that it does not reach the mating completion position. In addition, this path regulating body obstructs the other of the wires that have been routed to the adjacent position by another route, and the connector of the other wire becomes the mating target of the connector of the one wire. It is formed so that it does not reach the mating completion position with the connector.

  Thereby, even if the length to the subsequent connector of each electric wire that has been routed in a separate route to the adjacent position, the protection device interferes with the electric wire, Since the connector cannot reach a mating connector that is not a fitting target, it is possible to suppress erroneous connection of each connector to the mating connector. Moreover, even if each connector is the same product, this protective device can suppress erroneous connection of each connector to the counterpart connector for the same reason.

  Specifically, the path regulation body is preferably formed so as to have a plurality of plate-like wall portions arranged to face each other with an interval in the arrangement direction of two adjacent battery modules 110. The wall portion has an orthogonal plane with respect to the arrangement direction.

  For example, when the path regulation body regulates the path of each electric wire with only one plate-like wall part, due to the tolerance of various parts and the positional deviation of the wall part due to the accumulation of assembly intersections, There is a possibility that desired route regulation cannot be performed. Therefore, in this case, depending on the situation, there is a possibility that the effect of preventing erroneous connection of each connector to the mating connector will be reduced. However, this protective device has a plurality of plate-like wall portions that are opposed to each other with a space therebetween, so that even if a positional shift occurs in each wall portion, a single plate-like wall portion is provided. Compared with the case of only the wall portion, the influence on the wire path regulation can be suppressed to a low level. Therefore, this protective device can suppress erroneous connection of each connector to the counterpart connector.

  In addition, when the path regulation body regulates the path of each electric wire with only one flexible plate-like wall part, the worker can use the electric wire to make the wall part regardless of the previous positional deviation. By bending the connector, there is a possibility that each connector is erroneously connected to the mating connector. However, since this path protection body has a plurality of plate-like wall portions arranged to face each other at intervals, this protection device has one sheet even if each wall portion has flexibility. Compared with the case of only the plate-like wall portion, the influence on the wire path regulation can be suppressed. Therefore, this protective device can suppress erroneous connection of each connector to the counterpart connector.

  The plurality of wall portions may be constituted only by the path regulating body or may be constituted by the path regulating body and its peripheral parts. Peripheral parts are sub-protectors, for example. Further, in this battery pack 100, if there are parts other than the protection device such as a bus bar around the route regulating body, the parts may be assigned as peripheral parts.

  For example, the path regulating body is arranged in the arrangement direction so that the wall parts of the peripheral parts are arranged opposite to each other in the arrangement direction between two adjacent wall parts in the arrangement direction. An interval between two adjacent walls is formed. Here, the wall portion of the path regulating body and the wall body of the peripheral part are arranged to face each other with a space therebetween in the arrangement direction. Even when the protection device adopts a configuration using such peripheral components, the protection device can suppress the influence on the path regulation of the electric wire as compared with the case of only one plate-like wall portion. Therefore, this protective device can suppress erroneous connection of each connector to the counterpart connector.

  In addition, when the path regulating body can have only one plate-like wall portion, it is desirable that peripheral components are provided with a plurality of plate-like wall bodies arranged to face each other at intervals in the arrangement direction. . In this case, the path regulating body is formed so that the wall portion can be sandwiched between the two wall bodies of the peripheral parts with an interval in the arrangement direction. Even in this case, the protection device can suppress the influence on the path regulation of the electric wire as compared with the case of only one plate-like wall portion. Therefore, this protective device can suppress erroneous connection of each connector to the counterpart connector.

[Embodiment]
Hereinafter, a specific embodiment of the protection device will be described with reference to FIGS.

  Reference numeral 1 in FIGS. 1 and 2 represents the protection device of the present embodiment.

  The protection device 1 is configured to protect two types of battery state detectors (a first battery state detector and a second battery state detector). The protection device 1 includes a first main protector 2 (FIGS. 1 to 5) that protects the first battery state detector, and a second main protector 3 (FIGS. 8 and 8) that protects the second battery state detector. 13) as a main protector. The first main protector 2 and the second main protector 3 are provided for each battery module 110.

  The first battery state detection tool includes a first battery state detection sensor for detecting a first battery state, and a first electric wire drawn from the first battery state detection sensor. A 2nd battery state detection tool is provided with the 2nd battery state detection sensor for the 2nd battery state detection, and the 2nd electric wire pulled out from this 2nd battery state detection sensor. Specifically, this exemplary battery pack 100 includes a temperature detector 140 (FIGS. 7 and 9 to 11) for detecting the temperature of the battery cell 121 or the battery cell group 120 as the first battery state detector. I have. In addition, the illustrated battery pack 100 includes a voltage detector 150 (FIGS. 1 and 4) for detecting the voltage of the battery cell 121 or the battery cell group 120 inside the housing 130 as a second battery state detector. 6 and 12). The temperature detector 140 and the voltage detector 150 are connected to a battery monitoring unit (not shown) that monitors the battery state of the battery cell 121, and transmits detection information to the battery monitoring unit.

  In the battery module 110, a predetermined location of the battery cell 121 or the battery cell group 120 is hotter than other locations inside the housing 130. Therefore, in the battery module 110, at least one location where the temperature is high is determined as a temperature measurement position by the temperature detector 140.

  The temperature detector 140 includes a temperature sensor 141 for detecting the temperature of the battery cell 121 or the battery cell group 120 as the first battery state detection sensor (FIGS. 7 and 9 to 11). Further, the temperature detector 140 includes two first electric wires 142 drawn from the temperature sensor 141 (FIGS. 7 and 9 to 11). Here, a thermistor that detects a change in temperature based on a change in resistance value is used as the temperature sensor 141.

  The temperature sensor 141 is inserted from the outside of the housing 130 to the temperature measurement position inside the housing 130. Therefore, the housing | casing 130 has the sensor insertion port 132a which can insert the temperature sensor 141 in the temperature measurement position (FIG.6 and FIG.7). The sensor insertion opening 132a is formed in the cover 132 as a through hole. In this example, the sensor insertion port 132a is formed in a substantially rectangular shape. The temperature sensor 141 detects the temperature of the battery cell 121 or the battery cell group 120 at the temperature measurement position. The temperature sensor 141 may measure the temperature by bringing the sensor main body 141a (FIG. 11) into contact with the battery cell 121 at the temperature measurement position, or causes the sensor main body 141a to measure the ambient temperature of the battery cell 121 at the temperature measurement position. In some cases.

  This exemplary temperature sensor 141 has a support portion 141b that supports the sensor main body 141a, and the support portion 141b has a locked portion 141c (FIG. 11). In the temperature sensor 141, in the insertion direction from the sensor insertion port 132a, the sensor main body 141a is disposed on the front end side, and the support portion 141b is disposed on the rear end side. The first electric wire 142 is drawn out from the support portion 141b in the direction opposite to the insertion direction. The locked portion 141 c is used to hold the temperature sensor 141 on the first main protector 2. The locked portion 141c protrudes from the support portion 141b as a claw-shaped locking body in a direction orthogonal to the insertion direction. In the temperature sensor 141, the two locked portions 141c are arranged to face each other.

  Here, as described above, in the battery pack 100, the plurality of battery modules 110 are arranged in parallel with the orientation of the openings 131a or the orientation of the openings 131a of the plurality of battery modules 110 is adjusted. Another battery module 110 is stacked on the opening 131a side of the module 110. Therefore, in this battery pack 100, even if the battery modules 110 having the same configuration are arranged, the temperature measurement position differs for each battery module 110. Therefore, in this battery pack 100, it is necessary to change the installation location of the temperature sensor 141 for each battery module 110.

  Therefore, the battery module 110 of the present embodiment is configured so that the temperature sensor 141 can be installed in all places that can be temperature measuring positions. Specifically, the sensor insertion port 132a is formed in the cover 132 of the housing 130 so as to correspond to all places where the temperature measurement position can be obtained. Thereby, in the battery pack 100, since the battery module 110 can be shared regardless of the temperature measurement position, it is not necessary to prepare a battery module having a different housing for each temperature measurement position.

  The voltage detector 150 includes a voltage detection terminal 151 for detecting the voltage of the battery cell 121 or the battery cell group 120 as a second battery state detection sensor (FIGS. 6, 8, 12, and 13). Further, the voltage detection tool 150 includes a second electric wire 152 drawn out from the voltage detection terminal 151 (FIGS. 6, 8, 12, and 13). This exemplary voltage detection terminal 151 includes an electrical connection portion 151 a that is electrically connected to the conductive member 125 of the battery cell group 120, and a wire connection portion 151 b that is electrically connected to the terminal of the second electric wire 152. (FIGS. 8 and 13). The electrical connection portion 151a is physically and electrically connected to the conductive member 125 by welding or the like, for example. The electric wire connecting portion 151b is electrically connected to the end of the second electric wire 152 by, for example, crimping such as caulking. In the voltage detector 150, voltage detection terminals 151 are provided at a plurality of locations, and a second electric wire 152 is provided for each voltage detection terminal 151. Each of the second electric wires 152 is bundled together with an exterior member (not shown) or a protective tape (not shown) to form an electric wire group 153 (FIGS. 6, 8, and 13).

  The voltage detector 150 is held inside the housing 130 by a holding member 160 on a holding portion 131c of the storage box 131 (FIGS. 8 and 13).

Holding portion 131c has an exposed opening 131b as an opening, a main wall 131c ₁ of the holding member 160 is placed loaded, and side walls 131c ₂ arranged opposite at a distance from each other at both ends of the main wall 131c ₁ (FIGS. 8 and 13). Its main wall 131c ₁ and two side walls 131c ₂ are extend along the exposed port 131b (one side of the cover 132).

Holding member 160 is accommodated in the inner space of the main wall 131c ₁ and two holding portions 131c surrounded by the side wall 131c _2. The holding member 160 is formed of an insulating material such as synthetic resin. This exemplary holding member 160 includes a terminal accommodating portion 161 that accommodates the voltage detection terminal 151 while projecting the electrical connecting portion 151a, and a guide portion 162 that regulates the routing route of the wire group 153 (see FIG. 8 and FIG. 8). FIG. 13). The terminal accommodating portion 161 is provided for each voltage detection terminal 151. The guide parts 162 are provided at a plurality of locations on the wiring path of the electric wire group 153.

  The first main protector 2 will be described.

  The 1st main protector 2 is shape | molded with insulating materials, such as a synthetic resin. The first main protector 2 routes and holds the first electric wire 142 drawn out from the temperature sensor 141. The illustrated first main protector 2 is configured to hold the temperature sensor 141 in addition to the first electric wire 142. The first main protector 2 includes a sensor holder 10 that can hold the temperature sensor 141, and a wire routing structure 20 that can route and hold the first electric wire 142. (FIGS. 3, 9 and 10). In the first main protector 2, the sensor holder 10 and the electric cable routing structure 20 are integrally formed.

  The sensor holding body 10 includes an opening closing portion 11 that closes the sensor insertion opening 132a, a sensor holding portion 12 that can hold the temperature sensor 141 and is inserted into the housing 130 from the sensor insertion opening 132a, (FIG. 11).

  The opening blocking portion 11 is formed in accordance with the shape of the sensor insertion opening 132a. In this example, it is formed so as to have a substantially rectangular plate-like main portion. The opening closing portion 11 closes the sensor insertion port 132a so that one flat surface 11a (FIG. 11) in the main portion becomes an arrangement surface or a mating surface facing the sensor insertion port 132a.

  The sensor holding part 12 is erected on one flat surface 11a of the opening closing part 11 (FIG. 11). The illustrated sensor holding portion 12 is provided for each locked portion 141c of the temperature sensor 141, and is disposed opposite to the other flat surface 11a. The sensor holding portion 12 includes two shaft portions 12a that protrude from one plane 11a with a space therebetween, and a locking portion 12b that connects end portions on the protruding direction side of the two shaft portions 12a. (FIG. 11). The sensor holding portion 12 has flexibility at least on the shaft portion 12a.

  The temperature sensor 141 is inserted into the sensor holding body 10 in the direction opposite to the insertion direction from the sensor insertion port 132a. This temperature sensor 141 bends each sensor holding part 12 while pushing the locking part 12b by each locked part 141c. In each of the sensor holding portions 12, the respective locking portions are arranged so that the bending is eliminated when each locked portion 141 c gets over the locking portion 12 b and the temperature sensor 141 does not come off the sensor holding body 10. 12b is arranged opposite to each locked portion 141c in the insertion direction.

  Here, as described above, in the battery pack 100, the temperature measurement position changes depending on the arrangement of the battery modules 110. Therefore, the sensor holder 10 is provided for each place that can be a temperature measurement position.

  The electric wire arrangement structure 20 has a plurality of electric wire arrangement bodies that can arrange and hold the first electric wires 142. The electric wire arrangement structure 20 includes, as the electric wire arrangement body, a main line arrangement body 21 forming a trunk line, and a branch line arrangement body 22 branched from the main line arrangement body 21 and connected to the sensor holding body 10. (FIGS. 3, 9, and 10). The main line arrangement body 21 arranges and holds all the first electric wires 142 to be protected by the first main protector 2. All the first electric wires 142 are bundled together with an exterior member (not shown) or a protective tape (not shown). Below, all the 1st electric wires 142 bundled together are called the electric wire group 143. On the other hand, the branch line routing body 22 routes and holds the first electric wire 142 of the temperature sensor 141 held by the sensor holding body 10 to which the branch line routing body 22 is connected. Furthermore, the electric wire arrangement structure 20 includes a guide arrangement 23 that guides the electric wire group 143 arranged and held in the main line arrangement 21 toward the battery monitoring unit (FIGS. 3 and 9). And FIG. 10).

  The main line 21 is arranged along one side of the cover 132. Here, the main line 21 is arranged along one of the two sides perpendicular to the parallel arrangement direction of the battery modules 110. The trunk line 21 is formed in a linear shape that is longer than one side of the cover 132, and is arranged so that both ends protrude from the battery module 110.

  The main cable body 21 has a main wall 21a disposed to face the opening 131a, and side walls 21b that protrude from both ends of the main wall 21a along the extending direction of the main wall 21a (FIG. 14). ). The main line arrangement body 21 arranges and holds the electric wire group 143 along an inner space surrounded by the main wall 21a and the two side walls 21b. In this trunk line 21, the opening between the end portions on the protruding direction side of the two side walls 21 b becomes the electric wire insertion port 21 c (FIG. 14), and the electric wire group 143 is inserted from the electric wire insertion port 21 c.

  The trunk line 21 is provided with a holding portion 21d for holding the wired electric wire group 143 (FIG. 14). The holding part 21d is provided in the electric wire insertion port 21c. The holding portion 21d is formed as a cantilever piece projecting from one of the two side walls 21b toward the other. The holding portion 21 d is formed so that the gap between the free end and the other side wall 21 b is narrower than the minimum size in the radial direction of the wire group 143. The gap is set so that the electric wire group 143 can be pushed from the electric wire insertion opening 21c and the electric wire group 143 cannot be inserted without an external force. Further, the holding portion 21d and the two side walls 21b around it may be flexible in order to facilitate the push-in insertion of the wire group 143. The quantity of the holding portions 21d is determined according to the length of the trunk line 21. In this example, the holding portions 21d are provided at a plurality of locations.

  The guide arrangement body 23 extends in the orthogonal direction from the end of the main line arrangement body 21. In the electric wire arrangement structure 20, the guide arrangement bodies 23 are protruded in the same direction from both ends of the main line arrangement body 21. Here, each guide routing body 23 extends along the parallel arrangement direction of the battery modules 110. The guide routing body 23 includes a main wall 23a, two side walls 23b, a wire insertion port 23c, and a holding portion 23d similar to those of the trunk routing structure 21 (FIG. 15). The inner space of the guide wiring body 23 communicates with the inner space of the trunk wiring body 21.

  This 1st main protector 2 is provided with the 1st electric wire cover 30 which block | closes the electric wire insertion port 21c of the trunk line wiring body 21 and the electric wire insertion port 23c of the two guide wiring bodies 23 collectively (FIG. 8 to FIG. 8). 10, FIG. 14 and FIG. 15). The 1st electric wire cover 30 is shape | molded with insulating materials, such as a synthetic resin. The first electric wire cover 30 includes a main line cover body 31 that covers the entire wire insertion port 21c of the main line arrangement body 21, and a guide cover body 32 that blocks the whole or a part of the electric wire insertion port 23c of the guide wiring body 23. (FIGS. 9 and 10). The guide cover body 32 is provided for each guide routing body 23.

  The main line arrangement body 21 and the main line cover body 31 are provided in the claw-like locked portion 21e provided on the side wall 21b of the main line arrangement body 21 and the main line cover body 31, and are engaged in a closed state of the electric wire insertion port 21c. They are held together by a holding mechanism using a locking piece 31a hooked on the stopper 21e (FIG. 14). This holding mechanism is provided at a plurality of locations. The guide routing body 23 and the guide cover body 32 are provided on the claw-like locked portion 23e provided on the side wall 23b of the guide routing body 23 and the guide cover body 32, and the electric wire insertion port 23c is closed. They are held together by a holding mechanism using a locking piece 32a hooked on the locked portion 23e (FIG. 15). This holding mechanism is provided at a plurality of locations.

  The branch line routing body 22 may be connected to one sensor holding body 10 or may be connected to a plurality of sensor holding bodies 10. This branch line arrangement body 22 may have any shape between the main line arrangement body 21 and the sensor holding body 10. In this example, a branch line arrangement body 22A connected to one sensor holding body 10 is formed in a straight line, and a branch line arrangement body 22B connected to two sensor holding bodies 10 is formed in a Y shape (FIG. 3, FIG. 9 and FIG. 10).

  The branch line arrangement body 22 has a main wall 22a disposed opposite to the opening 131a, and side walls 22b respectively protruding from both ends of the main wall 22a along the extending direction of the main wall 22a (FIG. 11). ). Further, the branch line arrangement body 22 has a partition wall 22c that partitions between the two side walls 22b along the extending direction thereof (FIG. 11). In the branch wiring bodies 22A and 22B, the opening between the end portion on the protruding direction side of the one side wall 22b and the partition wall 22c and the end portion on the protruding direction side of the other side wall 22b and the partition wall 22c are arranged. Each opening serves as a wire insertion opening 22d (FIG. 11). In the branch wiring bodies 22A and 22B, one first electric wire 142 of the temperature sensor 141 is inserted from one electric wire insertion port 22d, and the other first electric wire 142 of the temperature sensor 141 is inserted from the other electric wire insertion port 22d. Inserted.

  The branch line routing bodies 22A and 22B are provided with a holding portion 22e for holding the routed first electric wires 142 (FIG. 16). The holding part 22e is provided in each electric wire insertion port 22d. The one holding portion 22e is formed as a cantilever-like locking body that protrudes from the partition wall 22c toward the one side wall 22b. The other holding portion 22e is formed as a cantilever-like locking body that protrudes from the partition wall 22c toward the other side wall 22b. Each holding portion 22e is formed such that the gap between the free end and the side wall 22b is narrower than the minimum size in the radial direction of the first electric wire 142. The gap is set so that the first electric wire 142 can be pushed and inserted from the electric wire insertion port 22d and the first electric wire 142 cannot be inserted without an external force. The quantity of holding | maintenance part 22e is determined according to the length of branch line routing body 22A, 22B. In this example, holding portions 22e are provided at a plurality of locations.

  In the first main protector 2, the first electric wire 142 is routed and held in at least one of the plurality of branch line routing bodies 22. The 1st main protector 2 is provided with the 2nd electric wire cover 40 which block | closes the electric wire insertion port 22d of the branch line wiring body 22 with which the 1st electric wire 142 is wired and hold | maintained (FIGS. 9-11). The 2nd electric wire cover 40 is shape | molded with insulating materials, such as a synthetic resin. This 2nd electric wire cover 40 is formed so that the whole or one part of the electric wire insertion port 22d of the branch line wiring body 22 can be plugged up. Here, the 2nd electric wire cover 40 which can be shared by each branch line wiring body 22A, 22B is formed. Therefore, the illustrated second electric wire cover 40 is formed in a straight line so as to close the electric wire insertion port 22d in the straight portion of the branch line arrangement bodies 22A and 22B. This 2nd electric wire cover 40 is each attached to the linear part of several places of branch line wiring body 22A, 22B.

  The branch line arrangement body 22 and the second electric wire cover 40 are provided on the claw-like locked portion 22f provided on the side wall 22b of the branch line arrangement body 22 and the second electric wire cover 40, and the two electric wire insertion ports 22d are closed. In this state, the holding portions 41 that are hooked on the locked portions 22f are held together (FIG. 11). This holding mechanism is provided at a plurality of locations. In this illustration, the straight line portions of the respective branch line routing bodies 22A and 22B are engaged so that the second wire cover 40 can be attached to any branch line routing body 22 regardless of which first wire 142 is routed. A stop 22f is provided.

  The first main protector 2 configured as described above is in a state where the temperature sensor 141 and the sensor holding unit 12 are inserted from the sensor insertion port 132a of the cover 132 of the housing 130 and placed on the cover 132. It is held by the housing 130. The cover 132 may be one on which the first main protector 2 is placed on a flat surface, or may be one in which the first main protector 2 is fitted in a groove. The illustrated cover 132 forms grooves 132b (FIG. 6) along the shape of the branch line arrangement body 22 of the first main protector 2, and each branch line arrangement body 22 is fitted into the groove 132b.

  As described above, in the battery module 110, the exposure opening 131 b exists in the housing 130. The 1st main protector 2 of this embodiment is comprised so that it can utilize also as a cover which block | closes the exposure port 131b. In this illustration, the first main protector 2 is configured to be able to close the exposure opening 131b simply by assembling the battery module 110.

  Therefore, here, the wire opening structure 20 is used to block the exposure opening 131b. Therefore, the electric wire routing structure 20 is formed so as to block the exposure opening 131b. In the illustrated electric wire arrangement structure 20, the main line arrangement 21 is formed and arranged so as to close the exposed opening 131b (FIG. 8). Specifically, the main line cover body 31 of the first electric wire cover 30 that closes the electric wire insertion opening 21c of the main line arrangement body 21 is given a function as a cover that closes the exposure opening 131b. The trunk line arrangement body 21 and the trunk line cover body 31 may be formed and arranged so as to cover the exposure opening 131b together with the peripheral edge thereof, and are fitted into the holding portion 131c of the storage box 131 from the exposure opening 131b. It may be formed and arranged. Here, the latter is illustrated. The first main protector 2 fits the trunk line arrangement body 21 and the trunk line cover body 31 into the holding portion 131c, and fits the branch line arrangement body 22 into the groove 132b so that the protruding amount from the battery module 110 is reduced. Since it can suppress, the enlargement of the physique of the battery pack 100 can be suppressed.

  By the way, in the two battery modules 110 adjacent in the parallel arrangement direction, the respective first main protectors 2 are arranged adjacent to each other in the parallel arrangement direction. The two adjacent first main protectors 2 connect the electric wire routing structures 20 to each other. The protection device 1 is provided with a connecting member 50 for connecting the held members 24 (FIGS. 2, 5, 9, and 10) included in the respective wire routing structures 20 (FIGS. 1 to 5). 5). The connecting member 50 is formed of an insulating material such as synthetic resin.

  For example, when the plurality of battery modules 110 are arranged in parallel, the first main protector 2 draws the first electric wire 142 (electric wire group 143) outward and leads it to the battery monitoring unit side (first main protector). 2A) and the others (first main protector 2B) can be broadly classified (FIGS. 1 to 5). In each of the first main protectors 2A and 2B, the shape of the guide routing body 23 is partially changed.

Each guide routing body 23A (FIGS. 3, 5, 9, and 10) of the first main protector 2A has a holding portion for the first electric wire 142 (electric wire group 143) at the end on the protruding direction side. It is formed as 23A ₁ (FIG. 9). Holding portion 23A ₁ of this example is a two piece body formed in an L-shape, it is wound with the binding band 61 with the first wire 142 (wire group 143). The first wire 142 (wire group 143) from its holding part 23A ₁ drawn outward and guided to the battery monitoring unit side. Hence, in this guide Haisakutai 23A, it is the it is not connected to the first main protection 2 next at the end of the holding portion 23A ₁ side. Therefore, in this guide Haisakutai 23A, it is provided the held body 24 only at the end opposite to the end portion of the holding portion 23A ₁ side.

  On the other hand, each guide routing body 23B (FIGS. 2 and 3) of the first main protector 2B may be coupled to the adjacent first main protector 2 at both ends thereof. Therefore, in this guide routing body 23B, the to-be-held bodies 24 are provided at both ends (FIG. 2).

  In this 1st main protector 2B, the 1st electric wire 142 (electric wire group 143) of its own trunk line 21 is the guide of adjacent 1st main protector 2A via its own guide line 23B. It is guided to the routing body 23A or the guide routing body 23B of the adjacent first main protector 2B.

  The held body 24 is provided at the end of the guide routing body 23. In the two adjacent first main protectors 2, the held bodies 24 are arranged side by side along the arrangement direction (hereinafter referred to as “first direction”) D <b> 1 (FIGS. 2 and 5). . On the other hand, the connecting member 50 is provided for each of the two held bodies 24 arranged along the first direction D1, and the holding body 51 that can hold each other with the held bodies 24, and the two And a connecting body 52 for connecting the holding body 51 (FIGS. 2 and 5). The held body 24 and the holding body 51 may have any shape as long as they can hold each other. For example, the to-be-held body 24 and the holding body 51 are brought into the holding state by setting the locking portions such as the claws of each of the held body 24 and the holding body 51 so as to be locked.

  This exemplary protection device 1 includes two types of connecting members 50 (connecting members 50A and 50B) (FIGS. 1, 3, and 4). Two adjacent first main protectors 2 are connected to one end side in the extending direction of each trunk line 21 by one connecting member 50 </ b> A, and the other end in the extending direction of each trunk line 21. The sides are connected by the other connecting member 50B. Each of the connecting members 50A and 50B has the same shape of the holding body 51, while the shape of each connecting body 52 is changed.

  Here, the holding portion 131 c and the holding member 160 described above route and hold the second electric wire 152 (electric wire group 153) drawn from the voltage detection terminal 151 inside the battery module 110. Therefore, in the battery pack 100, the holding portion 131 c and the holding member 160 serve as the second main protector 3 of the voltage detector 150.

  In two adjacent battery modules 110 arranged in parallel, each second electric wire 152 (electric wire group 153) extends along the exposed opening 131b (one side of the cover 132) at a position adjacent to the two battery modules 110. ing. That is, the second electric wires 152 (electric wire group 153) are arranged in parallel at positions adjacent to the respective battery modules 110. The extending direction of the second electric wire 152 (electric wire group 153) and the exposure port 131b (one side of the cover 132) is a direction perpendicular to the first direction D1. Hereinafter, the extending direction is referred to as a second direction D2. The stacking direction of the combination of the two battery modules 110 arranged in parallel is an orthogonal direction to the first direction D1 and the second direction D2. Hereinafter, the stacking direction is referred to as a third direction D3.

  Each second electric wire 152 (electric wire group 153) is drawn out of each battery module 110 at a position adjacent to two adjacent battery modules 110 (FIG. 6). Each of the second electric wires 152 (electric wire group 153) is drawn out from the housing 130 of each battery module 110 in the same direction. Each of the second electric wires 152 (electric wire group 153) has substantially the same length outside the housing 130.

  A connector 154 is physically and electrically connected to the terminal of each second electric wire 152 (electric wire group 153) (FIGS. 2, 3, 5, and 6). The connector 154 is fitted and fixed to the mating connector 170 (FIGS. 2, 3, and 5). Each of the second electric wires 152 (electric wire group 153) is connected to the battery monitoring unit via a connector 154 and a mating connector 170 that are fitted and fixed.

  The protection device 1 is a sub-protective device at a position adjacent to two adjacent battery modules 110 arranged in parallel and at a position where each of the second electric wires 152 (electric wire group 153) is pulled out from the housing 130 of the battery module 110. 4 (FIGS. 1 to 5). The sub protector 4 is formed of an insulating material such as a synthetic resin. The sub protector 4 is fixed to the battery module 110 with screws or the like.

  The secondary protector 4 routes and holds the second electric wire 152 (electric wire group 153) that has been routed to the adjacent position outside the battery module 110, and also the second electric wire 152 (electric wire group 153). The counterpart connector 170 to be fitted with the connector 154 of the terminal is held. In the illustrated secondary protector 4, the second electric wires 152 (electric wire group 153) that have been routed to another adjacent position are routed and held outside the battery module 110, and The mating connectors 170 to be fitted into the connectors 154 at the ends of the two electric wires 152 (the electric wire group 153) are respectively held.

  In the protection device 1, the sub protector 4 is provided on one of the combinations of the two battery modules 110 arranged in parallel. In this illustration, the sub protector 4 is provided for the combination of the battery modules 110 on the lower layer side.

  The auxiliary protector 4 is formed so as to guide the second electric wire 152 (electric wire group 153) drawn out from the battery module 110 at the adjacent position to the mating connector 170 together with the connector 154. The illustrated auxiliary protector 4 is formed so as to guide the second electric wires 152 (electric wire group 153) drawn outward from the respective battery modules 110 at adjacent positions to the mating connector 170 together with the connector 154. Further, the illustrated auxiliary protector 4 is formed so as to guide the second electric wire 152 (electric wire group 153) of the battery module 110 on the lower layer side.

  For example, the sub protector 4 includes a first passage 71A for guiding one second electric wire 152 (the electric wire group 153) and a second passage 71B for guiding the other second electric wire 152 (the electric wire group 153). (FIGS. 2, 3 and 5). The first passage 71A and the second passage 71B are arranged at symmetrical positions in the first direction D1 with the boundary portion between two adjacent battery modules 110 as the center. In addition, the first passage 71A and the second passage 71B are formed so as to guide the second electric wire 152 (electric wire group 153) toward the upper layer side in the third direction D3. The illustrated secondary protector 4 includes an openable / closable lid portion 72A that forms part of the wall surface of the first passage 71A, and an openable / closable lid portion 72B that forms part of the wall surface of the second passage 71B. (FIGS. 2, 3 and 5). One second electric wire 152 (electric wire group 153) is disposed in the first passage 71A with the lid portion 72A open, and then closed in the first passage 71A with the lid portion 72A closed. . The other second electric wire 152 (electric wire group 153) is placed in the second passage 71B with the lid portion 72B open, and then closed in the second passage 71B with the lid portion 72B closed. .

  Further, the illustrated auxiliary protector 4 is formed so as to hold all the mating connectors 170 to be fitted to the connectors 154 of the second electric wires 152 (electric wire group 153) on the upper layer side and the lower layer side, respectively. (FIGS. 2 and 5). The mating connectors 170 to be fitted into the respective upper-layer connectors 154 are respectively arranged at symmetrical positions in the first direction D1 with the boundary portion between the two adjacent battery modules 110 as the center. Similarly, the mating connectors 170 to be fitted to the respective connectors 154 on the lower layer side are respectively arranged at symmetrical positions in the first direction D1 with the boundary portion between the two adjacent battery modules 110 as the center. Here, each counterpart connector 170 on the upper layer side and each counterpart connector 170 on the lower layer side are arranged side by side in the third direction D3.

  By the way, the connecting member 50A shown above is adjacent to two adjacent battery modules 110 arranged in parallel, and each second electric wire 152 (electric wire group 153) from the housing 130 of the battery module 110. Arranged in the drawer position. Therefore, in this example, the path regulating body 80 is provided on the connecting member 50A (FIGS. 2, 3, 5, 17, and 18). Here, the connecting body 52 of the connecting member 50 </ b> A is formed as the path regulating body 80.

  The path regulating body 80 is disposed between positions where the second electric wires 152 (electric wire group 153) are drawn from the housing 130. The illustrated path regulating body 80 includes two rectangular plate-like wall portions 81 and 82 that are opposed to each other with a space therebetween in the first direction D1 (FIGS. 2, 3, 5, and 17). And FIG. 18). Each wall part 81 and 82 is each arrange | positioned in the symmetrical position of the 1st direction D1 centering on the boundary part of the two adjacent battery modules 110. FIG. One wall portion 81 is between the positions where each second electric wire 152 (electric wire group 153) is drawn from the housing 130, and one second electric wire 152 (electric wire group 153) is drawn from the housing 130. Is arranged in the vicinity of the drawing position of the one second electric wire 152 (electric wire group 153) within a range that does not impede. The other wall 82 is between the positions where each second electric wire 152 (electric wire group 153) is drawn from the housing 130, and the other second electric wire 152 (electric wire group 153) is drawn from the housing 130. Is arranged in the vicinity of the drawing position of the other second electric wire 152 (electric wire group 153) within a range that does not impede.

  Further, for the lower-layer side path regulation body 80, the sub-protective device 4 is used as the peripheral component described above. Therefore, in the illustrated secondary protector 4, the wall body 73 is disposed between the wall portions 81 and 82 so as to be opposed to each other in the first direction D1 with respect to the wall portions 81 and 82. (FIG. 19). The illustrated wall body 73 is formed in a rectangular plate shape.

  As described above, the protection device 1 according to the present embodiment can prevent erroneous connection of each connector 154 to the counterpart connector 170 as described above.

  Here, in the illustrated secondary protector 4, the second electric wires 152 (electric wire group 153) that are route-regulated and guided by the respective walls 81 and 82 are further route-regulated auxiliary. Guide wall portions (hereinafter referred to as “auxiliary wall portions”) 74A and 74B are provided (FIGS. 2, 5, and 19). One auxiliary wall 74A is configured to guide the second electric wire 152 (electric wire group 153) that has been route-regulated and guided by the one wall portion 81 to the first passage 71A. Formed between the one wall portion 81 and the first passage 71A on the routing route of the group 153). The other auxiliary wall 74B is guided by the second electric wire 152 so that the other second electric wire 152 (the electric wire group 153) whose path is restricted and guided by the other wall 82 is guided to the second passage 71B. It forms between the other wall part 82 and the 2nd channel | path 71B on the wiring path | route of (electric wire group 153). The auxiliary wall portions 74A and 74B are arranged to face each other with a space therebetween in the first direction D1. Thereby, the protection apparatus 1 of this embodiment can further suppress erroneous connection of each connector 154 to the counterpart connector 170.

DESCRIPTION OF SYMBOLS 1 Protective device 2,2A, 2B 1st main protector 4 Sub protector 24 Holder 50, 50A, 50B Connection member 52 Connection body 71A 1st channel | path 71B 2nd channel | path 73 Wall body 80 Path | route control body 81, 82 Wall Part 110 Battery module 121 Battery cell 131c Holding part (second main protector)
141 Temperature sensor (first battery state detection sensor)
142 First electric wire (electric wire)
151 Voltage detection terminal (second battery state detection sensor)
152 Second electric wire
154 Connector 160 Holding member (second main protector)
170 Mating connector

Claims (6)

A main protector that is provided for each battery module including a plurality of battery cells, and that routes and holds an electric wire drawn from a battery state detection sensor for detecting a battery state of the battery cell;
Arranged in the adjacent position of the two adjacent battery modules arranged in parallel, routed and held the electric wire routed to the adjacent position outside the battery module, and of the end of the electric wire A sub-protector that holds the mating connector to be mated with the connector;
For each of the electric wires arranged at the adjacent position and routed to the adjacent position by another route, a path regulating body that regulates the route to the counterpart connector of the electric wire,
A protective device comprising:   The path regulating body guides each of the electric wires routed to another adjacent position to the adjacent position toward the mating connector to be fitted to the connector of each terminal, and the two connectors. 2. The protection device according to claim 1, wherein the protection device is formed so as to restrict a path of each of the electric wires so that the wire cannot be fitted to the mating connector opposite to the fitting target.   3. The protection device according to claim 1, wherein the path regulation body includes a plurality of plate-like wall portions arranged to face each other with an interval in the arrangement direction of the two adjacent battery modules. .   The path regulating body is arranged so that the wall parts of the peripheral parts are arranged opposite to each other in the arrangement direction with respect to the wall parts between two wall parts adjacent in the arrangement direction. The protection device according to claim 3, wherein the gap between the two wall portions adjacent in the arrangement direction is formed. A first main protector for routing and holding a first electric wire drawn from a first battery state detection sensor for detecting a first battery state of the battery cell; and a second main detector for detecting a second battery state of the battery cell. A second main protector for routing and holding the second electric wire drawn from the battery state detection sensor inside the battery module, as the main protector;
The said sub protector is shape | molded so that the said 2nd electric wire as the said electric wire pulled out from the said battery module in the said adjacent position may be guided to the said other party connector with the said connector. To 4. The protective device according to any one of 4. A connecting member that connects the held bodies of the two adjacent first main protectors is provided at the adjacent position.
The protection device according to claim 5, wherein the path regulation body is provided on the connecting member.

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