JP2015225806A - Power storage device and grommet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power storage device and a grommet that can stably hold a wire.SOLUTION: A grommet has two body portions which are separated by a separation face along an insertion direction of a wire and hold the wire so as to pinch the wire. Each of the two body portions has a wiring groove in which the wire is inserted, a fitting groove which is provided to the outer periphery of the body portion and extends in a direction perpendicular to the insertion direction of the wire, and an inner rib which is provided to the wire groove to be projected and pressed against the outer peripheral surface of the wire. The inner rib is provided within the same plane as the plane on which the fitting groove extends.

Description

  The present invention relates to a power storage device and a grommet.

  Conventionally, when a harness is inserted into a harness insertion hole formed in a sheet metal separating the outside and inside of the housing, the edge of the sheet metal and the harness are prevented from coming into contact with each other, and gas or the like does not leak from the harness insertion hole. In order to seal, the thing which attached the grommet to the harness beforehand is used. Moreover, in order to improve a routing freedom degree, the structure which provides a slit in a grommet and can attach a grommet in the middle of an assembly is shown (refer patent document 1).

JP 2000-340052 A

  However, the grommet described in the above-mentioned patent document is premised on the use of a corrugated tube having an annular unevenness on the outer periphery. Therefore, when a tube having no irregularities on the outer periphery is used, the tube may be insufficiently fixed.

(1) A power storage device according to a first aspect of the present invention includes a first casing that stores a storage element, a second casing that stores a control device, and a first switch provided in the first casing. A wiring provided via each of the notch and the second notch provided in the second housing, and a grommet to be attached to the wiring, the grommet being divided along the insertion direction of the wiring Two main body parts that are divided by a surface and hold the wiring so as to sandwich the wiring, and a hinge part that connects the two main body parts, and each of the two main body parts includes a wiring groove through which the wiring is inserted. A groove provided on the outer periphery of the main body portion and engaged with the first notch, the first engagement groove extending in a direction orthogonal to the insertion direction of the wiring, and provided on the outer periphery of the main body portion. A groove that engages with the second notch and extends in a direction perpendicular to the insertion direction of the wiring. A second engaging groove that is present, and an inner rib that protrudes from the wiring groove and is in pressure contact with the outer peripheral surface of the wiring, and the inner rib has a surface on which the first engaging groove extends. They are provided in the same plane and in the same plane as the plane on which the second engagement groove extends.
(2) The grommet according to the invention of claim 5 is divided by a dividing surface along the wiring insertion direction, and has two main body portions that hold the wiring so as to sandwich the wiring, and a hinge portion that connects the two main body portions. Each of the two main body portions includes a wiring groove into which the wiring is inserted, an engagement groove provided on the outer periphery of the main body portion and extending in a direction orthogonal to the wiring insertion direction, and a wiring groove. And an inner rib that is pressed against the outer peripheral surface of the wiring, and the inner rib is provided in the same plane as the surface on which the engagement groove extends.

  According to the present invention, the wiring can be stably held.

It is a figure explaining the structure of the vehicle-mounted electrical machinery system (electric motor drive system) containing the electrical storage apparatus of one embodiment. It is an external appearance perspective view of the housing | casing of an electrical storage apparatus. It is a disassembled perspective view of the grommet periphery of FIG. It is a perspective view which shows the attachment state to the housing | casing of a grommet. It is a perspective view which shows the attachment state to the housing | casing of a grommet. It is an external appearance perspective view of a grommet. It is a perspective view which shows the state which opened the grommet of 2 division structure. It is an external appearance perspective view of a grommet. It is an external appearance perspective view of a grommet. It is sectional drawing for demonstrating the holding state of the wire harness in a grommet. It is sectional drawing in the XI-XI cross section in FIG. 9 of a grommet, and is a figure which shows the state which opened the grommet slightly. It is the figure which looked at the vicinity of the grommet with which the notch part was mounted | worn from the illustration upper direction in FIG. It is the figure which looked at the vicinity of the grommet with which the notch part was mounted | worn from the illustration upper direction in FIG.

  With reference to FIGS. 1-13, one Embodiment of the electrical storage apparatus and grommet by this invention is described. Below, the case where the power storage device according to one embodiment is applied to a power storage device constituting an in-vehicle power supply device of an electric vehicle, particularly an electric vehicle will be described as an example. The electric vehicle includes a hybrid electric vehicle including an engine that is an internal combustion engine and an electric motor as a driving source of the vehicle, and a genuine electric vehicle using the electric motor as the only driving source of the vehicle.

  First, the configuration of an in-vehicle electric system (electric motor drive system) including a power storage device according to an embodiment will be described with reference to FIG.

  The in-vehicle electric system includes a motor generator 910, an inverter device 920, a vehicle controller 930 that controls the entire vehicle, a power storage device 1000 that constitutes the in-vehicle power supply device, and the like. The power storage device 1000 includes a plurality of storage batteries, and is configured as a lithium ion battery device including a plurality of lithium ion battery cells, for example.

  An electric vehicle (including an electric vehicle and a hybrid vehicle) equipped with such an in-vehicle electric system includes a travel drive device that generates travel drive by electric power, a power storage device according to the present invention that supplies electric power to the travel drive device, and travel And a vehicle body provided with a driving device. The power storage device includes a battery block configured by housing an assembled battery including a plurality of battery cells in a conductive casing, a battery controller that manages the battery cells, and a control device that includes the cell controller.

  The inverter device 920 includes a power module 921, a driver circuit 922, a motor controller 923, and a smoothing capacitor 924.

  The power storage device 1000 includes a battery module 100 for storing and discharging electrical energy (charging and discharging DC power), and a control device 200 for managing and controlling the state of the battery module 100.

  The battery module 100 includes, for example, two battery blocks (or battery packs), that is, a high potential battery block 100a and a low potential battery block 100b that are electrically connected in series. Each battery block contains an assembled battery. Each assembled battery is composed of a connection body in which a plurality of lithium ion battery cells are electrically connected in series.

  An SD (service disconnect) switch 700 is provided between the negative electrode side (low potential side) of the high potential battery block 100a and the positive electrode side (high potential side) of the low potential battery block 100b. The SD switch 700 is a safety device provided to ensure safety during maintenance and inspection of the power storage device 1000. The SD switch 700 includes an electric circuit in which a switch and a fuse are electrically connected in series. Operated during maintenance and inspection.

  The control device 200 includes a battery controller 230 corresponding to a higher level (parent) and a cell controller 220 corresponding to a lower level (child). The battery controller 230 manages and controls the state of the power storage device 1000, and notifies the vehicle controller 930 and the motor controller 923, which are host control devices, of charge / discharge control commands such as the state of the power storage device 1000 and allowable charge / discharge power. The management and control of the state of the power storage device 1000 includes the measurement of the voltage and current of the power storage device 1000, the calculation of the power storage state (SOC: State Of Charge) and the deterioration state (SOH: State Of Health), There are measurement of the temperature of the battery block, output of a command to the cell controller 220 (for example, a command for measuring the voltage of each lithium ion battery cell, a command for adjusting the storage amount of each lithium ion battery cell, etc.).

  The cell controller 220 is a limb of the so-called battery controller 230 that manages and controls the state of a plurality of lithium-in on battery cells according to a command from the battery controller 230, and includes a plurality of integrated circuits (ICs). The management and control of the states of the plurality of lithium ion battery cells include measurement of the voltage of each lithium ion battery cell, adjustment of the amount of electricity stored in each lithium ion battery cell, and the like. In each integrated circuit, a plurality of corresponding lithium ion battery cells are determined, and state management and control are performed for the corresponding plurality of lithium ion battery cells.

  As a power source for the battery controller 230, an in-vehicle auxiliary machine, for example, an auxiliary battery mounted as a power supply device for a light or an audio device (in the case of an automobile, a lead battery having a nominal output voltage of 12 volts) is used. For this reason, the voltage (for example, 12 volts) from the auxiliary battery is applied to the battery controller 230. The battery controller 230 steps down the applied voltage by a power supply circuit composed of a DC-DC converter (DC-DC power converter) (for example, steps down to 5 volts). A drive voltage is applied to the electronic components to be configured. Thereby, the electronic component which comprises the battery controller 230 act | operates.

  A plurality of corresponding lithium ion battery cells are used as the power supply of the integrated circuit constituting the cell controller 220. For this reason, both the cell controller 220 and the battery module 100 are electrically connected via the connection line 850. The voltage of the highest potential of a corresponding plurality of lithium ion battery cells is applied to each integrated circuit via a connection line 850. Each integrated circuit steps down the applied voltage (for example, down to 5 volts) by a power supply circuit, and uses this as an operation power supply.

  The battery controller 230 receives a signal output from the ignition key switch. The signal output from the ignition key switch is used as a signal for starting and stopping the power storage device 1000.

  When the ignition key switch is turned on, in the battery controller 230, the power supply circuit operates based on the output signal from the ignition key switch, and a driving voltage is applied from the power supply circuit to a plurality of electronic circuit components to thereby generate a plurality of electronic circuits. The circuit component operates. As a result, the battery controller 230 is activated. When the battery controller 230 is activated, an activation command is output from the battery controller 230 to the cell controller 220.

  In the cell controller 220, the power supply circuits of the plurality of integrated circuits are sequentially operated based on the activation command from the battery controller 230, and the plurality of integrated circuits are sequentially activated. As a result, the cell controller 220 is activated. When cell controller 220 is activated, a predetermined initial process is executed, and power storage device 1000 is activated.

  As predetermined initial processing, for example, measurement of voltage of each lithium ion battery cell, abnormality diagnosis, measurement of voltage and current of power storage device 1000, measurement of temperature of each battery block, calculation of power storage state and deterioration state of power storage device 1000 And calculation of allowable charge / discharge power of the power storage device 1000.

  When the ignition key switch is turned off, a stop command is output from the battery controller 230 to the cell controller 220. When the cell controller 220 receives a stop command, a predetermined termination process is executed, and then the power supply circuits of the plurality of integrated circuits are sequentially stopped, and the plurality of integrated circuits are sequentially stopped. Thereby, the cell controller 220 stops. When the cell controller 220 stops and communication with the cell controller 220 becomes impossible, the battery controller 230 stops the operation of the power supply circuit and stops the operation of the plurality of electronic circuit components. Thereby, battery controller 230 stops and power storage device 1000 stops.

  Examples of the predetermined termination process include measurement of the voltage of each lithium ion battery cell and adjustment of the charged amount of each lithium ion battery cell.

  Communication via the in-vehicle local area network is used for information transmission between the battery controller 230 and the host controller such as the vehicle controller 930 and the motor controller 923. For information transmission between the battery controller 230 and the cell controller 220, LIN communication conforming to communication by the in-vehicle local area network is used.

  Both the positive terminal of the high-potential side battery block 100a and the DC positive side external terminal of the inverter device 920 are electrically connected via a positive side power cable 610. The negative electrode terminal of the low-potential side battery block 100b and the DC negative electrode side external terminal of the inverter device 920 are electrically connected via a negative electrode power cable 620.

  A junction box 400 is provided in the middle of the power cable 600. Inside the junction box 400, a relay mechanism including a main relay 410 and a precharge circuit 420 is housed. The relay mechanism is an opening / closing unit for electrically connecting and disconnecting the battery module 100 and the inverter device 920. When the on-vehicle electric system is activated, the relay mechanism is connected between the battery module 100 and the inverter device 920. When the system is stopped or abnormal, the battery module 100 and the inverter device 920 are disconnected. Thus, by controlling between the power storage device 1000 and the inverter device 920 with the relay mechanism, high safety of the in-vehicle electric machine system can be ensured.

  The driving of the relay mechanism is controlled by the motor controller 923. The motor controller 923 receives a notification of the completion of the activation of the power storage device 1000 from the battery controller 230 when the on-vehicle electric system is activated, and thereby outputs a conduction command signal to the relay mechanism to drive the relay mechanism. Further, the motor controller 923 receives an output signal from the ignition key switch when the in-vehicle electric system is stopped, and receives an abnormal signal from the vehicle controller 930 when the in-vehicle electric system is abnormal. And outputs a shutoff command signal to drive the relay mechanism.

  The main relay 410 includes a positive side main relay 411 and a negative side main relay 412. Positive-side main relay 411 is provided in the middle of positive-side power cable 610, and controls electrical connection between the positive-side of power storage device 1000 and the positive-side of inverter device 920. The negative main relay 412 is provided in the middle of the negative power cable 620 and controls the electrical connection between the negative side of the power storage device 1000 and the negative side of the inverter device 920.

  A current sensor 430 is housed in the junction box 400. Current sensor 430 is provided to detect a current supplied from power storage device 1000 to inverter device 920. The output line of the current sensor 430 is electrically connected to the battery controller 230. Battery controller 230 detects the current supplied from power storage device 1000 to inverter device 920 based on the signal output from current sensor 430. This current detection information is notified from the battery controller 230 to the motor controller 923, the vehicle controller 930, and the like. The current sensor 430 may be installed outside the junction box 400. The current detection part of the power storage device 1000 may be not only the inverter device 920 side of the positive main relay 411 but also the battery module 100 side of the positive main relay 411.

  Note that a voltage sensor for detecting the voltage of the power storage device 1000 may be housed in the junction box 400. The output line of the voltage sensor is electrically connected to the battery controller 230 similarly to the current sensor 430. Battery controller 230 detects the overall voltage of power storage device 1000 based on the output signal of the voltage sensor. This voltage detection information is notified to the motor controller 923 and the vehicle controller 930. The voltage detection part of the power storage device 1000 should be on both the battery module 100 side and the inverter device 920 side of the relay mechanism.

  2 is an external perspective view of the housing of the power storage device 1000, FIG. 3 is an exploded perspective view around the grommet in FIG. 2, and FIGS. 4 and 5 are perspective views showing a state in which the grommet is attached to the housing. FIG. The housing of the power storage device 1000 includes a lower housing 1 that houses the battery module 100 and an upper housing 2 that houses the control device 200.

  As shown in FIG. 2, the lower casing 1 is a box-shaped member having a rectangular parallelepiped shape whose dimensions in the height direction are smaller than those in the width direction and the depth direction. And an upper cover 12 that closes the upper opening of the main box 11. The upper cover 12 has a bottomless box shape that closes the upper portion of the main box 11. The upper cover 12 and the main box 11 are formed by, for example, pressing a metal thin plate. An opening 11b is provided on the side surface of the main box 11 on the front side in FIG. An opening 12b is provided on the side surface of the upper cover 12 on the front side in FIG.

  As shown in FIG. 3, the upper casing 2 has a box shape in which the upper surface and the side surface on the front side of the paper are open, an upper box 21 having a storage space, a top cover 22 that closes the upper surface, and a side cover that closes the side surface 23. The upper box 21, the top cover 22, and the side cover 23 are formed by, for example, pressing a thin metal plate. The side cover 23 is a member for closing the opening 11b of the main box 11, the opening 12b of the upper cover 12, and the opening 21b of the upper box 21, and the inner surface (inner surface) 23a is airtight. A seal member 23b is provided. For the seal member 23, for example, flexible soft silicon, fluorine resin, or the like is used. The upper surface 12a of the upper cover 12 of the lower housing 1 and the bottom surface 21a of the upper box 21 of the upper housing 2 are separated from each other.

  The battery module 100 in the lower casing 1 and the control device 200 in the upper casing 2 are connected by a wire harness 800 (see FIG. 10). The wire harness 800 is an assembled electric wire obtained by bundling a plurality of wires including the connection line 850 and bundling them with, for example, a straight tube 810. The grommet 3 according to the present invention is a member for fixing and protecting the wire harness 800 disposed between the lower housing 1 and the upper housing 2, and from the front side surface of the power storage device 1000. Attached between the lower casing 1 and the upper casing 2.

  The upper surface 12 a of the upper cover 12 is provided with a notch 24 through which the wire harness 800 is passed and for mounting the grommet 3. The bottom surface 21 a of the upper box 21 is provided with a cutout portion 25 through which the wire harness 800 is passed and for mounting the grommet 3. When one grommet 3 is fixed at a plurality of locations as in the present embodiment, it is desirable to change the shape of the notch 24 and the notch 25 in order to prevent misassembly of the grommet 3. In addition, when a plurality of grommets 3 are mounted with one power storage device 1000, it is desirable to change the shape of the notches 24 and 25 depending on the location in order to mount the grommets 3 at the correct location.

  6 and 8 and 9 are external perspective views of the grommet 3, and FIG. 7 is a perspective view showing a state in which the grommet 3 having a two-part structure is opened. The grommet 3 is a molded product made of an elastomer such as rubber or elastic resin, and the two main body portions 30 (30a, 30b) divided by the dividing surfaces 40a, 40b are formed into a thin plate shape or a film shape. The hinges 31 are connected to each other. By bending the hinge portion 31, the grommet 3 having the two main body portions 30a and 30b can be opened and closed. When the grommet 3 is closed by bending the hinge portion 31, the split surface 40a of the main body portion 30a and the split surface 40b of the main body portion 30b come into contact with each other.

  On the outer periphery of the grommet 3, two engaging grooves 32 that engage with the notches 24 and 25 are provided. The engagement groove 32 extends in a direction orthogonal to the insertion direction of the wire harness 800. The surface of the grommet 3 that faces the inner surface 23a of the side cover 23 when the grommet 3 is attached to the notches 24 and 25 is referred to as a back surface 51.

  The inner surface of the grommet 3 is provided with a wiring groove 33 through which the wire harness 800 is inserted when the grommet 3 is closed and the wire harness 800 is held between the two main body portions 30a and 30b. Considering the bending of the wire harness 800 at the portion extending from the wiring groove 33 to the outside of the grommet 3, the end of the wiring groove 33 in the extending direction is outward along the extending direction of the wiring groove 33. A chamfered portion 33a that is chamfered so as to increase in inner diameter as it goes is provided. In the present embodiment, two wiring grooves 33 are provided in the grommet 3.

  In the wiring groove 33, an inner rib 41 a extending in a direction orthogonal to the extending direction of the wiring groove 33, that is, in a direction orthogonal to the insertion direction of the wire harness 800 is projected. A rib 41b that protrudes along the extending direction of the inner rib 41a of the wiring groove 33 is provided on the dividing surface 40a of the main body portion 30a. On the dividing surface 40b of the main body portion 30b, the rib 41b fits in a position facing the rib 41b of the main body portion 30a when the grommet 3 is closed, that is, on the extension line in the extending direction of the inner rib 41a of the wiring groove 33. A groove 41c is provided. The arrangement positions of the inner rib 41a, the rib 41b and the groove 41c along the extending direction of the wiring groove 33 coincide with the arrangement position of the engagement groove 32. That is, the inner rib 41a, the rib 41b, and the groove 41c are provided in the same plane as the surface on which the engagement groove 32 extends.

  The dividing surface 40a of the main body portion 30a is provided with a fitting boss 35 that is a protrusion protruding from the dividing surface 40a. On the dividing surface 40b of the main body portion 30b, when the grommet 3 is closed, a fitting hole 36 that is a concave portion into which the fitting boss 35 is fitted is provided at a position facing the fitting boss 35 of the main body portion 30a.

  The main body portion 30a is provided with a claw portion 34a for preventing the grommet 3 from rotating around the hinge portion 31 from opening. The main body portion 30b is provided with a locking portion 34b that is locked to the claw portion 34a. The grommet 3 is kept closed by locking the locking portion 34b to the claw portion 34a.

  In addition, the main body portion 30 is provided with a binding band fastening portion 52 so that it is easy to fasten with a binding band (not shown) when it is necessary to securely hold the wire harness 800 and perform sealing described later. ing. The binding band fastening portion 52 is provided in the vicinity of the hinge portion 31 of the main body portion 30 and has a through hole 52 a for passing the binding band and a groove portion 52 b on the outer periphery of the main body portion 30.

  FIG. 10 is a cross-sectional view for explaining a holding state of the wire harness 800 in the grommet 3, and shows a cross section taken along line XX in FIG. When the grommet 3 is closed in a state where the wire harness 800 is not disposed, the inner rib 41 a protrudes inward from the outer diameter of the wire harness 800. Therefore, when the grommet 3 is closed in a state where the wire harness 800 is disposed, the tip portion of the inner rib 41a is pressed against the outer periphery of the wire harness 800 and deformed. Thereby, the inner rib 41 a seals the gap between the inner periphery of the wiring groove 33 and the outer periphery of the wire harness 800. Note that, in a place where the inner rib 41 a is not provided, a gap is provided between the inner periphery of the wiring groove 33 and the outer periphery of the wire harness 800. As described above, in the present embodiment, in the wiring groove 33, the gap between the inner periphery of the wiring groove 33 and the outer periphery of the wire harness 800 is sealed only by the inner rib 41a. The sealing effect of the gap between the inner periphery and the outer periphery of the wire harness 800 is improved.

  FIG. 11 is a cross-sectional view of the grommet 3 taken along the line XI-XI in FIG. 9 and shows a state where the grommet 3 is slightly opened. Thus, when the corner 42a where the back surface 51 and the dividing surface 40a intersect with the corner portion 42b where the back surface 51 and the dividing surface 40b intersect each other and opening the grommet 3 as shown in FIG. The hinge part 31 is pulled in the horizontal direction in the figure. That is, in the state shown in FIG. 11, a force for closing the grommet 3 acts on the main body portions 30a and 30b by the restoring force (elastic force) that the pulled hinge portion 31 tries to return to the original state.

  When the wire harness 800 is fixed to the lower housing 1 and the upper housing 2 using the grommet 3 configured as described above, the grommet 3 is closed and the wiring groove 33 of the two main body portions 30a and 30b is used to connect the wire harness 800. Hold the outer periphery. At this time, when the main body portions 30a and 30b are rotated around the hinge portion 31 to some extent and the grommet 3 is closed, the grommet 3 tends to be automatically closed by the restoring force of the hinge portion 31 described above.

  When the grommet 3 is closed, the fitting boss 35 and the fitting hole 36 are fitted, and the main body portions 30a and 30b are prevented from being displaced in a direction parallel to the dividing surfaces 40a and 40b. By closing the grommet 3 and locking the locking portion 34b to the claw portion 34a, the grommet 3 is kept closed with the wire harness 800 interposed therebetween. When it is necessary to securely hold the wire harness 800 and seal with the inner rib 41a, the grommet 3 may be appropriately tightened with a binding band (not shown) wound around the binding band fastening portion 52.

  Next, the grommet 3 sandwiching the wire harness 800 as described above is attached to the notches 24 and 25 as shown in FIGS. 12 is a view of the vicinity of the grommet 3 attached to the notches 24 and 25 as viewed from above in FIGS. As shown in FIG. 4 and FIG. 12, when the grommet 3 is attached to the notches 24 and 25, the back surface 51 of the grommet 3 is the side surface 12c of the upper cover 12 around the opening 12b or the front side in FIG. Thus, it is flush with the bent portion 21c that is bent upward from the bottom surface 21a of the upper box 21. In addition, when the grommet 3 is closed, the back surface 51 becomes a flat surface without unevenness.

  When the side cover 23 is attached, as shown in FIG. 13, the sealing member 23 becomes the back surface 51, the side surface of the main box 11 around the opening 11 b, the side surface 12 c of the upper cover 12, and the bent portion of the upper box 21. It abuts against the side surface of 21c. Thereby, the opening part of the side surface of the lower housing | casing 1 and the upper housing | casing 2 is closed.

  As shown in FIG. 13, the width of the cutout portion 25 and the cutout portion 24 in the horizontal direction in the drawing is set as a cutout width W1, and the bottom portion of the engagement groove 32 of the main body portion 30a and the bottom portion of the engagement groove 32 of the main body portion 30b. Is the groove thickness W2. In the present embodiment, in order to improve the sealing effect of the gap between the inner periphery of the wiring groove 33 and the outer periphery of the wire harness 800 by the inner rib 41a, the notch width W1 may be made narrower than the groove portion thickness W2. desirable.

  As described above, the arrangement position of the inner rib 41 a along the extending direction of the wiring groove 33 coincides with the arrangement position of the engagement groove 32. Therefore, if the notch width W1 is narrower than the groove thickness W2, the inner rib 41a can be more closely attached to the outer periphery of the wire harness 800 by attaching the grommet 3 to the notches 24 and 25. It is conceivable that the groove thickness W2 is increased by sandwiching the wire harness 800. Therefore, even if the notch width W1 is equal to the groove thickness W2 in the state where the wire harness 800 is not clamped or wider than the groove thickness W2 in the state where the wire harness 800 is not clamped, the above-described effects are obtained. Play.

The power storage device 1000 and the grommet 3 configured as described above have the following operational effects.
(1) The two main body portions 30a and 30b divided by the dividing surfaces 40a and 40b are connected by the hinge portion 31, and the grommet 3 is configured to provide the wiring groove 33 in each of the two main body portions 30a and 30b. Then, the inner rib 41 a is formed to project in the wiring groove 33. The grommet 3 is closed, and the inner rib 41 a is brought into contact with the outer periphery of the wire harness 800 to be deformed, whereby the wire harness 800 is held by the grommet 3. Thereby, even if the straight tube 810 is used for bundling the wiring in the wire harness 800, the wire harness 800 can be stably held by the inner rib 41a, and the inner periphery of the wiring groove 33 and the outer periphery of the wire harness 800 can be maintained. The gap can be sealed. Therefore, the straight tube 810 that can be reduced in outer diameter can be used for the exterior of the wire harness 800 as long as there is no annular unevenness on the outer periphery as compared with the corrugated tube. Contribute to

  In addition, since the gas generated from the battery module 100 can be prevented from flowing into the upper housing 2 through the gap between the inner periphery of the wiring groove 33 and the outer periphery of the wire harness 800, the gas generated from the battery module 100 can be prevented. The influence on the control device 200 can be prevented, and the reliability of the control device 200 can be improved.

  If the grommet 3 is closed and the outer periphery of the wire harness 800 can be compressed with the inner rib 41a, the unevenness of the outer periphery of the wire harness 800 and the increase / decrease in the diameter of the wire harness 800 are followed. Therefore, the type of exterior of the wire harness 800 can be applied to either a straight tube 810 or a corrugated tube. Therefore, the versatility of the grommet 3 is enhanced.

(2) The inner rib 41a is configured such that the arrangement position along the extending direction of the wiring groove 33 coincides with the arrangement position of the engagement groove 32. Thereby, by attaching the grommet 3 to the notches 24 and 25, the inner rib 41a can be further adhered to the outer periphery of the wire harness 800, and the reliability of the holding of the wire harness 800 and the sealing by the inner rib 41a can be improved.

(3) When the grommet 3 is closed, the fitting boss 35 and the fitting hole 36 are fitted, and the main body portions 30a and 30b are prevented from being displaced from each other in a direction parallel to the dividing surfaces 40a and 40b. Configured. Thereby, when attaching the grommet 3 to the notches 24 and 25, the main body portions 30a and 30b sandwiching the wire harness 800 are not displaced from each other by the dividing surfaces 40a and 40b, so that the grommet 3 is attached to the notches 24 and 25. The workability of the work to install can be improved.

(4) The grommet 3 is closed, and the locking portion 34b is locked to the claw portion 34a, so that the grommet 3 is held in a closed state with the wire harness 800 interposed therebetween. Thereby, since the grommet 3 which clamped the wire harness 800 is not opened when attaching the grommet 3 to the notch parts 24 and 25, the workability | operativity of the operation | work which attaches the grommet 3 to the notch parts 24 and 25 can be improved.

(5) Since the binding band fastening portion 52 is provided on the grommet 3, the reliability of holding the wire harness 800 and sealing by the inner rib 41a can be improved by appropriately fastening the grommet 3 with a binding band (not shown).

(6) When the grommet 3 is attached to the notches 24 and 25, the back surface 51 of the grommet 3 is flush with the side surface 12c of the upper cover 12 around the opening 12b and the bent portion 21c of the upper box 21. Configured. Moreover, when the grommet 3 was closed, it was comprised so that the back surface 51 might become a plane without an unevenness | corrugation. Further, when the side cover 23 is attached, the sealing member 23 becomes the back surface 51, the side surface of the main box 11 around the opening 11b, the side surface 12c of the upper cover 12, and the bent portion of the upper box 21, as shown in FIG. It comprised so that it might contact | abut to the side surface of 21c. Thereby, the opening portions on the side surfaces of the lower casing 1 and the upper casing 2 are closed, and the gas generated from the battery module 100 can be prevented from flowing into the upper casing 2, so that it is generated from the battery module 100. The influence of the gas on the control device 200 can be prevented, and the reliability of the control device 200 can be improved.

(7) Since the grommet 3 is provided with the hinge portion 31 and has a hinge structure that can be opened and closed, the wire harness 800 can be attached during the housing assembly process. Thus, for example, as described above, if two wiring grooves 33 are provided in the grommet 3, two wire harnesses 800 procured from different suppliers can be sandwiched by the single grommet 3 during the housing assembly process. Space can be saved by reducing the number.

---- Modified example ---
(1) In the above description, the object to be held in the grommet 3 is the wire harness 800, but the present invention is not limited to this. For example, the object to be held by the grommet 3 may be a single wire of a covered electric wire.

(2) In the above description, the wire harness 800 in which the straight tube 810 is used is described as an example, but the present invention is not limited to this. That is, a wire harness using a corrugated tube having an annular unevenness on the outer periphery may be used.

(3) In the above description, two wiring grooves 33 are provided in the grommet 3, but the present invention is not limited to this. For example, the grommet 3 may be provided with one wiring groove 33, and the grommet 3 may be provided with three or more wiring grooves 33.

(4) In the above description, the inner rib 41a is protruded from the wiring groove 33 at two locations apart in the extending direction of the wiring groove 33, but the present invention is not limited to this. For example, one of the two inner ribs 41a may be omitted while being separated in the extending direction of the wiring groove 33. Further, the inner ribs 41a may be protruded at three or more locations apart in the extending direction of the wiring groove 33. In any case, it is desirable that the disposition position of the at least one inner rib 41a along the extending direction of the wiring groove 33 coincides with the disposition position of the engagement groove 32. ,Not required.

(5) In the above description, the arrangement position of the inner rib 41a along the extending direction of the wiring groove 33 is configured to coincide with the arrangement position of the engagement groove 32. It is not limited. In order to improve the sealing effect of the gap between the inner periphery of the wiring groove 33 by the inner rib 41a and the outer periphery of the wire harness 800, the arrangement position along the extending direction of the wiring groove 33 of the inner rib 41a is the engagement groove. Although it is desirable to coincide with the arrangement position of 32, it is not essential as described in the above (4). Further, if the above-described sealing effect can be improved by attaching the grommet 3 to the notches 24 and 25, the arrangement position along the extending direction of the wiring groove 33 is the inner rib 41a and the engaging groove. 32 may be slightly deviated.

(6) In the above description, the example in which the power storage device 1000 is used for an electric vehicle has been described. However, the present invention is not limited to this example. For example, the power storage device 1000 is used for other applications such as a railway vehicle. Also good.

(7) In the above description, the grommet 3 is a molded product made of rubber or a resin having elasticity, but the present invention is not limited to this. If at least the inner rib 41a is formed of rubber or a resin having elasticity, the other portion may be formed of a resin having a low elasticity, for example.
(8) You may combine each embodiment and modification which were mentioned above, respectively.

  The present invention is not limited to the above-described embodiments and modifications, and it goes without saying that various changes can be made without departing from the scope of the invention.

DESCRIPTION OF SYMBOLS 1 Lower housing | casing 2 Upper housing | casing 3 Grommet 24, 25 Notch part, 30 (30a, 30b), 31 Hinge part, 32 Engagement groove, 33 Wiring groove, 34a Claw part, 34b Locking part, 35 Fitting boss, 36 Fitting hole, 40a, 40b Dividing surface, 41a Inner rib, 51 Back surface, 52 Binding band fastening part, 200 Control device, 800 Wire harness, 810 Straight tube, 1000 Power storage device

Claims (8)

A first housing for storing a power storage element;
A second housing for housing the control device;
Wiring disposed via each of the first notch provided in the first casing and the second notch provided in the second casing;
A grommet to be attached to the wiring,
The grommet is
Two main body parts that are divided by a dividing surface along the insertion direction of the wiring and hold the wiring so as to sandwich the wiring,
A hinge portion connecting the two main body portions;
Each of the two body parts is
A wiring groove through which the wiring is inserted;
A groove provided on an outer periphery of the main body portion and engaged with the first notch, the first engagement groove extending in a direction orthogonal to the insertion direction of the wiring;
A groove provided on an outer periphery of the main body portion and engaged with the second notch, and extending in a direction orthogonal to the insertion direction of the wiring;
An inner rib protruding from the wiring groove and pressed against the outer peripheral surface of the wiring;
The inner rib is a power storage device provided on the same surface as the surface on which the first engagement groove extends and on the same surface as the surface on which the second engagement groove extends. The power storage device according to claim 1,
Each of the two main body portions abuts each other on the divided surfaces when held so as to sandwich the wiring,
One of the two main body portions is provided with a protrusion on the dividing surface,
The power storage device, wherein a concave portion that fits the projection is provided on the split surface on the other of the two main body portions. The power storage device according to claim 1 or 2,
When one of the two main body portions is held so that the wiring is sandwiched between the two main body portions, the two main body portions are prevented from rotating and opening around the hinge portion. There are claw parts to make
A power storage device in which a locking portion that is locked to the claw portion is provided on the other of the two main body portions. In the electrical storage apparatus as described in any one of Claims 1-3,
Each of the two main body portions is a power storage device having a through hole through which a binding band hung from the outer periphery passes. Two main body parts that are divided by a dividing surface along the insertion direction of the wiring and hold the wiring so as to sandwich the wiring,
A hinge portion connecting the two main body portions;
Each of the two body parts is
A wiring groove through which the wiring is inserted;
An engagement groove provided on the outer periphery of the main body portion and extending in a direction perpendicular to the insertion direction of the wiring;
An inner rib protruding from the wiring groove and pressed against the outer peripheral surface of the wiring;
The inner rib is a grommet provided in the same plane as the plane on which the engagement groove extends. The grommet according to claim 5, wherein
Each of the two main body portions abuts each other on the divided surfaces when held so as to sandwich the wiring,
One of the two main body portions is provided with a protrusion on the dividing surface,
A grommet provided with a recess that fits with the protrusion on the split surface on the other of the two main body portions. In the grommet according to claim 5 or 6,
When one of the two main body portions is held so that the wiring is sandwiched between the two main body portions, the two main body portions are prevented from rotating and opening around the hinge portion. There are claw parts to make
The grommet provided with the latching | locking part latched by the said nail | claw part in either one of the said 2 main-body parts. In the grommet according to any one of claims 5 to 7,
Each of the two main body portions is a grommet having a through hole through which a binding band hung from the outer periphery passes.

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