JP6378008B2 - Service plug mounting structure - Google Patents

Description

  The present invention relates to a service plug mounting structure in which a service plug for blocking a high voltage circuit of a secondary battery provided in a vehicle is mounted on a battery module.

  In an electric vehicle or a hybrid vehicle, a secondary battery for supplying electric power to the motor is mounted.

  In addition, a service plug is attached to the secondary battery in order to eliminate a risk of electric shock when handling the secondary battery in vehicle maintenance or the like. The service plug is a plug that is interposed in a circuit to which a high voltage of the secondary battery is applied and cuts off the high voltage circuit. Usually, since the secondary battery is arranged inside the trunk of the vehicle or at the rear part of the rear seat, the service plug as the accessory element is also arranged inside the trunk or at the rear part of the rear seat.

  The specific structure of the service plug is described in Patent Document 1 below, for example. Referring to FIG. 2 of this patent document and the explanation thereof, a battery pack 20 is disposed below the floor panel 11, and a service plug 22 is fixed to a battery pack cover 21 that protects the battery pack 20. When the electric vehicle is serviced, the service plug 22 is pulled out to cut off the high voltage circuit, thereby preventing the operator from receiving an electric shock or the like.

  The following non-patent document 1 also describes a service plug mounting structure. Specifically, referring to page 16, there is disclosed the matter of pulling out the service plug from the high voltage battery by causing the lever while pushing the claw (a) after removing the floor board. By pulling out the service plug, there is no risk of an electric shock to the high voltage, so that the worker can safely contact the high voltage component.

JP2013-159235A http://www.fhi.co.jp/rescue/hybrid/pdf/rescue_manual.pdf (searched June 9, 2014)

  However, the above-described service plug mounting structure has a problem that the cost increases because the service plug and the number of parts associated therewith are large. Furthermore, since the process of unlocking the service plug is different from the process of removing the service plug itself, the labor involved in removing the service plug is complicated. In addition, since the service plug is removed from the battery module, the worker who removed the service plug may lose the service plug or forget to attach the service plug after the work.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a service plug mounting structure with improved service plug handling and operability.

The present invention provides a service plug attachment structure for attaching a service plug to a battery module, a first lever portion rotatably attached to the battery module, a rotatably attached to the battery module, and the first a second lever portion which is Kin設the first lever portion is connected to a circuit built in the battery module, anda the service plug in conjunction with said first lever portion and said second lever portion, said By operating the first lever portion and the second lever portion in a state of being separated from the battery cover covering the battery while being connected to the battery module, the service plug is moved upward from the terminal portion. is separated, characterized in that a state where the service plug is blocked service Plug mounting structure.

  According to the present invention, the service plug is shut off by operating the first lever portion and the second lever portion in a state where the battery module is connected to the first and second lever portions and the service plug. State. Therefore, even if the high voltage circuit is cut off by the service plug, the first lever and the second lever are connected to the battery module, so that the loss of the service plug and the forgotten attachment are suppressed.

It is a figure which shows the service plug attachment structure of this invention, (A) is sectional drawing which shows a vehicle rear part, (B) is a circuit diagram which shows a high voltage circuit. It is a figure which shows the service plug attachment structure of this invention, and is sectional drawing which shows a battery module. It is a figure which shows the service plug attachment structure of this invention, (A) is sectional drawing which shows the state in which the service plug was connected, (B) is sectional drawing which shows the state in which the service plug was interrupted | blocked. It is a figure which shows the other service plug attachment structure of this invention, (A) is sectional drawing which shows the state in which the service plug was connected, (B) is sectional drawing which shows the state in which the service plug was interrupted | blocked .

  Referring to FIG. 1, battery module 12 including service plug 18 of this embodiment is employed in vehicle 10. The vehicle 10 is, for example, an electric vehicle or a hybrid vehicle. When the vehicle 10 is an electric vehicle, the vehicle 10 travels using a motor that rotates with electric power supplied from the battery module 12 as a drive source. When the vehicle 10 is a hybrid vehicle, the vehicle 10 travels using one or both of the motor and the engine as a drive source.

  The battery module 12 is disposed behind the rear seat 14 inside the vehicle 10. Further, a luggage compartment is partitioned behind the rear seat 14 by a partition plate 16 serving as a floor, and the battery module 12 is disposed below the partition plate 16. The battery module 12 has a plurality of battery cells 20 stacked in the front-rear direction, and the battery cells 20 are protected from above by a battery cover 24.

  The service plug 18 is provided on the upper part of the battery module 12. The service plug 18 is in a connected state under normal use conditions of the vehicle 10 and becomes a part of a path through which a high-voltage current generated by the battery cell 20 passes. On the other hand, when the battery module 12 is serviced, the service plug 18 is cut off in order to prevent the operator from receiving an electric shock. Specifically, when the operator removes the partition plate 16 and operates the service plug 18 from above, the service plug 18 enters a cut-off state. The operation method of the service plug 18 will be described later with reference to FIG.

  FIG. 1B shows an electric circuit incorporated in the battery module 12. The plurality of battery cells 20 built in the battery module 12 are connected in series. The battery cells 20 arranged at both ends are connected to a motor (not shown) via a relay 22. The service plug 18 of this embodiment is disposed between the battery cells 20 or between the battery cells 20 and the relay 22, and the current from the battery cell 20 to the outside described above can be reduced by disconnecting the service plug 18. Supply is also cut off.

  FIG. 2 is a cross-sectional view showing the battery module 12 described above. The battery module 12 has a plurality of battery cells 20 stacked in the front-rear direction inside the case, and these battery cells 20 are connected in series. The upper surface of the case in which the battery cell 20 is stored is protected by a battery cover 24. The service plug 18 is disposed in an opening 48 where a part of the battery cover 24 is opened. The service plug 18 is assembled to the service plug base exposed from the opening 48 of the battery cover 24. The structure in which the service plug 18 is assembled will be described later with reference to FIG.

  With reference to FIG. 3, the attachment structure of the service plug 18 is demonstrated. 3A shows the mounting structure of the service plug 18 in the connected state, and FIG. 3B shows the connecting structure of the service plug 18 in the disconnected state. In these drawings, the first lever portion 30 and the second lever portion 32 are indicated by solid lines, and the service plug 18 is indicated by dotted lines.

  Referring to FIG. 3A, the mounting structure of the present embodiment can be rotated with respect to the first lever portion 30 that is rotatably mounted to the base 26 (service plug base) and similarly to the base 26. And a service plug 18 that is linked to these lever portions.

  The base 26 is formed of a part of the case of the battery module, and the concave portion 28 is formed by making the base 26 partially concave. Further, the position of the concave portion 28 coincides with the position of the opening 48 formed in the battery cover 24.

  The first lever portion 30 is a lever-shaped member made of an injection-molded resin material, and a first grip portion 38 that is gripped by an operator is provided at an end portion on the −X side, and a side surface of the + X side end portion is The curved surface in which the 1st gear 34 was formed is exhibited. Further, the guide pin 41 on the base 26 side is engaged with the first lever portion 30, and the first lever portion 30 is guided by the guide pin 41 when the first lever portion 30 is rotated during use. Rotate.

  The second lever portion 32 is a lever provided close to the first lever portion 30 so as to face the first lever portion 30 in the X direction. The second lever portion 32 is disposed on the + X side and is gripped by the operator, and the −X side. And a second gear 36 disposed at the same position. Similar to the first lever portion 30, the side surface on the -X side of the second lever portion 32 where the second gear 36 is formed has a curved surface shape.

  A gear structure is configured by the teeth of the first gear 34 of the first lever portion 30 and the teeth of the second gear 36 of the second lever portion 32. Therefore, the first lever portion 30 and the second lever portion 32 rotate in conjunction with each other.

  The service plug 18 is formed by molding a metal into a plug shape. During normal use, the + X side end and the −X side end of the service plug 18 are connected to terminals on the base 26 side. The shape of the service plug 18 in a side view is a shape obtained by rotating the katakana “ko” 90 degrees counterclockwise. Furthermore, the end portion of the service plug 18 on the −X side is engaged with the first lever portion 30 via the engagement portion 44, and the end portion of the service plug 18 on the + X side is engaged with the first lever portion 30 via the engagement portion 46. The two lever portions 32 are engaged. In the engaging portion 44 and the engaging portion 46, engaging means such as a screw penetrating each member is employed.

  The concave portion 28 is a portion where the base 26 corresponding to the opening 48 of the battery cover 24 is recessed. The service plug 18 and its connecting portion are accommodated in the concave portion 28. The first lever portion 30 and the second lever portion 32 are also partially accommodated in the concave portion 28.

  When servicing the secondary battery and related parts, the high voltage circuit is shut off by pulling out the service plug 18 in order to eliminate the risk of electric shock. In this embodiment, by rotating the first lever portion 30 or the second lever portion 32 from the state shown in FIG. 3A in the direction in which the first lever portion 30 or the second lever portion 32 is raised, the service plug 18 interlocking with these lever portions 30 and 32 is moved upward. This is separated from the terminal portion to perform the above-described blocking.

  In order to pull the service plug 18 upward, the first lever portion 30 and the second lever portion 32 are operated and rotated. In the present embodiment, both the lever portions 30 and 32 can be rotated by operating and rotating either the first lever portion 30 or the second lever portion 32. As described above, the first gear 34 of the first lever portion 30 and the second gear 36 of the second lever portion 32 are engaged. Therefore, when the operator grasps the first grip portion 38 of the first lever portion 30 and rotates it clockwise, the driving force is applied to the second lever portion 32 via the first gear 34 and the second gear 36 described above. The second lever portion 32 rotates counterclockwise. Here, the lever operated by the user may be the second lever portion 32. In this case, the driving force is transmitted to the first lever portion 30 via the second gear 36 and the first gear 34 by the user holding the second grip portion 40 and rotating the second lever portion 32. Both lever parts 30 and 32 come to rotate.

  When the first lever portion 30 rotates counterclockwise, the rotation is guided by the guide pin 41. That is, while the first lever portion 30 is rotating, the guide pin 41 itself does not move, but slides with an arch-shaped groove provided on the main surface of the first lever portion 30. Note that the guide pin and the sliding groove having the above-described configuration are the same for the second lever portion 32.

  Referring to FIG. 3B, when the first lever portion 30 and the second lever portion 32 are rotated by the user's operation, the first grip portion 38 and the second lever portion 32 of the first lever portion 30 are rotated. The second grip 40 is directed upward. That is, the first lever portion 30 rotates approximately 90 degrees clockwise, and the second lever portion 32 rotates approximately 90 degrees counterclockwise. Here, the terminal end of rotation of the first lever portion 30 is defined by rotating until the end portion of the first lever portion 30 comes into contact with the side wall on the −X side of the concave portion 28.

  When the first lever portion 30 rotates clockwise, the engaging portion 44 moves upward. Similarly, when the second lever portion 32 rotates counterclockwise, the engaging portion 46 moves upward. Therefore, the service plug 18 engaged with these lever portions via the engagement portion 44 and the engagement portion 46 also moves upward and is separated from the connection portion (not shown).

  As a result, the high voltage circuit of the secondary battery is cut off, and the operator can work without fear of electric shock. Further, the first lever portion 30 and the second lever portion 32 are separated from the battery cover 24 and the pressing is released. Further, both lever portions face upward inside the opening 48. Therefore, the battery cover 24 can be easily removed.

  After the above-described work of the operator is completed, the first lever part 30 or the second lever part 32 is operated so as to face horizontally rearward. Specifically, by rotating the first lever part 30 counterclockwise, the second lever part 32 rotates clockwise in conjunction with this. And both lever parts will be in the state shown in Drawing 3 (A). Further, with the rotation of the first lever part 30 and the second lever part 32, the service plug 18 descends and becomes conductive with the connecting part, and the high voltage circuit connected with the secondary battery becomes conductive. Further, the battery cover 24 around the opening 48 is pressed by the first lever portion 30 and the second lever portion 32.

  In this embodiment, as shown in FIG. 3B, the service plug 18, the first lever portion 30, and the second lever portion 32 are connected to the base 26 even when the high-voltage circuit is shut off by the service plug 18. Maintains a connected state. Therefore, it is prevented that the worker who is working loses these parts during work. Furthermore, forgetting to attach these components is also prevented.

  Furthermore, the high voltage circuit can be shut off by the service plug 18 and the pressing of the battery cover 24 can be released by one operation of rotating the first lever portion 30 and the like. Therefore, the burden on the operator who maintains the secondary battery is reduced.

  Further, as shown in FIG. 3A, the first lever portion 30 and the second lever portion 32 are linked via a first gear 34 and a second gear 36. Therefore, by rotating any one of the first lever part 30 or the second lever part 32, the other also rotates in conjunction with each other, so that the above-described blocking operation can be easily performed.

  Furthermore, once the battery cover 24 is removed, the lever cannot be operated to be in a conductive state unless the positions of the concave portion 28 of the base 26 and the opening 48 of the battery cover 24 are matched. Therefore, the battery cover 24 is prevented from being displaced with respect to the base 26 after work.

  With reference to FIG. 4, another embodiment of the service plug mounting structure shown in FIG. 3 will be described. 4A is a side view showing the mounting structure in which the service plug 18 is conductive, and FIG. 4B is a side view showing the mounting structure in which the service plug 18 is blocked.

  The service plug mounting structure shown in FIG. 4 is basically the same as that shown in FIG. 3, and the difference is that a release lever 50 is provided. In this figure, the first lever portion 30 and the second lever portion 32 are indicated by solid lines, the service plug 18 is indicated by a dotted line, and the release lever 50 is indicated by a one-dot chain line.

  FIG. 4A shows an attachment structure when the service plug 18 is in a conductive state. In the service plug mounting structure shown in this figure, the first lever portion 30 and the second lever portion 32 are not formed with a gear structure as shown in FIG. A release lever 50 is installed between the first lever portion 30 and the second lever portion 32.

  The release lever 50 includes a third grip portion 52 disposed at the center, a connecting portion 54 laid between the third grip portion 52 and the first lever portion 30, the third grip portion 52, and the second lever. The connecting portion 56 is provided between the portion 32 and the connecting portion 56. Moreover, the connection part of the 3rd holding | grip part 52, the connection part 54, and the connection part 56 is rotatably connected because connection means, such as a screw, penetrates these members.

  During the blocking operation, the operator holds the third holding portion 52 of the release lever 50 and pulls it upward. Then, the tensile force applied to the third grip portion 52 is transmitted to the first lever portion 30 via the connecting portion 54 of the release lever 50, and the first lever portion 30 rotates clockwise. Similarly, the tensile force is transmitted to the second lever portion 32 via the connecting portion 56, and the second lever portion 32 rotates counterclockwise.

  Referring to FIG. 4B, when the operation of pulling upward the third grip 52 is continued, the rotation of the first lever 30 and the second lever 32 also proceeds, and both levers are moved upward. Turn to face. At this time, the connecting portion 54 and the connecting portion 56 both exhibit the katakana “C”. Further, after the pulling operation by the release lever 50, the operator may pull up the first gripping portion 38 of the first lever portion 30 and the second gripping portion 40 of the second lever portion 32 from the middle.

  Since the first lever part 30 and the second lever part 32 and the service plug 18 are connected via the engaging part 44 and the engaging part 46, the service plug 18 is also moved upward as both lever parts rotate. Moving. As a result, the service plug 18 is separated from the connection portion, and the high voltage circuit is shut off.

  When conducting the high-voltage circuit after the work is finished, if the third grip 52 is pressed downward from above, the pressing force is transmitted via the connecting portions 54 and 56 to the first lever portion 30 and the second lever portion 32. To communicate. Then, the first lever portion 30 rotates counterclockwise, the second lever portion 32 rotates clockwise, and with these rotations, the service plug 18 moves downward to be connected to the connection portion, and the high voltage circuit Becomes conductive. Here, the service plug 18 may be made conductive by rotating the first lever part 30 and the second lever part 32 so as to tilt outward.

  The service plug mounting structure of the present embodiment described above can be modified as follows, for example.

  Referring to FIG. 3A, the first lever portion 30 and the second lever portion 32 may be configured without the gear portion. Even if it is such a structure, even if each lever is operated and the service plug 18 is shut off, these elements are not separated from the base 26, and thus the above-described effects are exhibited.

DESCRIPTION OF SYMBOLS 10 Vehicle 12 Battery module 14 Rear seat 16 Partition plate 18 Service plug 20 Battery cell 22 Relay 24 Battery cover 26 Base 28 Concave part 30 1st lever part 32 2nd lever part 34 1st gear 36 2nd gear 38 1st holding part 40 second gripping portion 41 guide pin 44 engaging portion 46 engaging portion 48 opening 50 release lever 52 third gripping portion 54 connecting portion 56 connecting portion

Claims (5)

Service plug mounting structure for mounting the service plug to the battery module,
A first lever portion rotatably attached to the battery module;
A second lever portion that is rotatably attached to the battery module and is disposed close to the first lever portion;
Connected to said built-in circuit in the battery module, anda the service plug in conjunction with said first lever portion and said second lever portion,
By operating the first lever portion and the second lever portion in a state of being connected to the battery module in a direction away from the battery cover that covers the battery, the service plug is moved upward to form a terminal portion. A service plug mounting structure, wherein the service plug is in a state of being separated from the service plug. The first lever portion and the second lever portion are rotatable with respect to directions facing each other,
A first gear is formed on the first lever portion of the portion that contacts the second lever portion, and a first gear that engages the first gear is formed on the second lever portion of the portion that contacts the first lever portion. The service plug mounting structure according to claim 1, wherein two gears are formed.   2. The service plug mounting structure according to claim 1, further comprising a release lever portion that engages with the first lever portion and the second lever portion from above. The first lever portion, the second lever portion and the service plug are attached to a service plug base exposed from an opening provided in the battery cover,
4. The service according to claim 1, wherein the battery cover in the vicinity of the opening is pressed by the first lever portion and the second lever portion in a tilted state. 5. Plug mounting structure. 5. The service according to claim 4, wherein pressing the battery cover by the first lever portion and the second lever portion is released by raising the first lever portion and the second lever portion. Plug mounting structure.

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