JP2009158219A - On-vehicle power storage device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an on-vehicle power storage device improved in maintenance property and for enhancing safety so that a user may not touch a fuse inadvertently. <P>SOLUTION: The battery pack 20 which includes a secondary battery for outputting power and is mounted on a vehicle includes a case 27 to house the secondary battery, a fuse 22 which is incorporated in an electric circuit including the secondary battery 21 and is positioned so as to be exposed outside from the case 27, and a fuse cover 30 which is installed on the case 27 detachably and includes a cover body 30a to cover the fuse 22 and a scattering suppression film 30c to be pasted on the outer face of the cover body 30a. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an on-vehicle power storage device.

2. Description of the Related Art Conventionally, as an in-vehicle power storage device, a main switch, a contactor, a fuse, and other components for protecting a power storage device are arranged in a recess provided on the front surface of the base plate or the back surface facing the power storage device (for example, , See Patent Document 1). In this in-vehicle power storage device, the fuse is disposed in the recess on the back side of the base plate so that the user does not touch the fuse carelessly.
JP 2005-153827 A

  In the conventional in-vehicle power storage device, although safety is taken into consideration so that the user does not touch the fuse inadvertently, the fuse is disposed in the recess on the back surface of the base plate facing the power storage unit. It takes a lot of work to replace the. Therefore, the conventional in-vehicle power storage device still has room for improvement, particularly in terms of maintainability.

  Therefore, the in-vehicle power storage device of the present invention is mainly intended to improve safety while improving maintenance so that the user does not touch the fuse carelessly.

  The in-vehicle power storage device of the present invention employs the following means in order to achieve the main object described above.

The in-vehicle power storage device of the present invention is
An in-vehicle power storage device that has a secondary battery capable of outputting electric power and is mounted on a vehicle,
A case for housing the secondary battery;
A fuse incorporated in an electric circuit including the secondary battery and positioned to be exposed to the outside from the case;
A protective cover including a cover body that is detachably attached to the case and covers the fuse; and a scattering suppression film that is adhered to at least one of an outer surface and an inner surface of the cover body;
Is provided.

  In this in-vehicle power storage device, a fuse for protecting a secondary battery or the like is positioned so as to be exposed to the outside from a case housing the secondary battery, and is covered with a protective cover that is detachably attached to the case. . Therefore, in a state where the protective cover is attached to the case so as to cover the fuse, it is possible to prevent the user from inadvertently touching the fuse. Further, if the protective cover is removed from the case, the fuse can be easily replaced. Further, the protective cover includes a cover main body and a scattering suppression film that is attached to at least one of the outer surface and the inner surface of the cover main body. As a result, even if a large external force is applied to the protective cover, and the cover body is cracked, the cover body is held so as not to be scattered by the scattering prevention film, so that the function of the protective cover covering the fuse is maintained. Can do. As a result, according to the in-vehicle power storage device, it is possible to improve the safety while improving the maintainability and preventing the user from inadvertently touching the fuse.

  The in-vehicle power storage device is disposed behind the rear seat of the vehicle, and the fuse is disposed in the case when the in-vehicle power storage device is disposed behind the rear seat of the vehicle. The fuse may be determined so as to be positioned on the cargo compartment side of the vehicle. Thereby, since it becomes easy to reach a fuse and a protective cover from the luggage compartment side, the maintainability of the in-vehicle power storage device can be further improved.

  Furthermore, the arrangement position of the fuse in the case may be determined so that the fuse is positioned closer to the side of the vehicle when the in-vehicle power storage device is arranged behind the rear seat of the vehicle. . As a result, when the in-vehicle power storage device is disposed behind the rear seat of the vehicle, the user carelessly touches the fuse as compared with the case where the fuse is positioned closer to the center in the vehicle width direction, for example. Can be suppressed.

  In addition, the scattering suppression film may be permeable and attached to the outer surface of the cover body, and a label for displaying predetermined information may be interposed between the cover body and the scattering suppression film. Thus, by writing appropriate information on the label, it is possible to urge the user to avoid touching the protective cover and thus the fuse covered by the user carelessly.

  Next, the best mode for carrying out the present invention will be described using examples.

  FIG. 1 is a schematic diagram of a vehicle 50 equipped with a battery pack 20 as an in-vehicle power storage device according to one embodiment of the present invention, and FIG. 2 is a block configuration diagram of the battery pack 20. As can be seen from FIG. 2, the vehicle 50 according to the embodiment is configured as a hybrid vehicle (or an electric vehicle) including a motor MG that exchanges electric power with the battery pack 20 and can output driving power and regenerative braking force. The As shown in FIG. 1, the battery pack 20 according to the embodiment is disposed behind the rear seat 51 of the vehicle 50 so that a user's hand can easily reach from the trunk room 52. The battery pack 20 includes a secondary battery (battery) 21 including a first battery module 21a and a second battery module 21b, and a fuse connected in series between the first battery module 21a and the second battery module 21b. 22, a service plug 23, a current sensor 24, a battery electronic control unit (hereinafter referred to as “battery ECU”) 25 for managing the secondary battery 21, and a plurality of system main relays and resistors (registers) not shown And a buffer unit 26 having The battery pack 20 includes a case 27 that houses the secondary battery 21, the current sensor 24, the battery ECU 25, the buffer unit 26, and the like.

  Each of the first battery module 21a and the second battery module 21b constituting the secondary battery 21 is configured by further connecting a plurality of modules composed of a plurality of cells connected in series. For example, the secondary battery 21 as a whole can output a high voltage of about 200V. The fuse 22 is blown when a high voltage is applied to electrically cut off the electric circuit including the secondary battery 21, thereby protecting each component constituting the electric circuit from a failure due to overcurrent. The service plug 23 is detachably attached to the surface side of the case 27 so that the user's hand can be easily reached when the battery pack 20 is mounted on the vehicle 50. By removing the service plug 23, it is possible to cut off the high voltage at the intermediate position of the secondary battery 21, thereby ensuring the safety of maintenance work of the battery pack 20. The current sensor 24 detects a current flowing through the electric circuit and transmits a signal indicating the detected value to the battery ECU 25. The battery ECU 25 manages the secondary battery 21 based on a current detected by the current sensor 24, a battery temperature detected by a temperature sensor (not shown), and the like, and information on the secondary battery 21 is transmitted to the entire vehicle 50 as necessary. Is transmitted to a hybrid electronic control unit (hereinafter referred to as “hybrid ECU”) 40 for controlling Each system main relay of the buffer unit 26 is ON / OFF controlled by the hybrid ECU 40. Thereby, the electric power from the secondary battery 21 can be supplied to the motor MG via the inverter 42, or the electric power supply from the secondary battery 21 can be canceled. Moreover, if each system main relay is controlled so that the current flows through the resistor for a predetermined time when the connection between the battery pack 20 and the inverter 42 or the like is started, the components constituting the electric circuit are detected from the inrush current. Can be protected.

  FIG. 3 is an enlarged perspective view of a main part showing a peripheral portion of the fuse 22 of the battery pack 20. As shown in the figure, the fuse 22 is attached to the case 27 of the battery pack 20 so as to be exposed to the outside, and is attached by a fuse cover (protective cover) 30 that is detachably attached to the case 27 of the battery pack 20. Covered. Accordingly, it is possible to prevent the user from touching the fuse 22 directly when the fuse cover 30 is attached to the case 27. Further, if the fuse cover 30 is removed from the case 27, the user can easily replace the fuse 22. As shown in FIG. 4, the fuse cover 30 includes a cover main body 30a made of plastic such as polypropylene, a thin scattering suppression film 30c attached to the outer surface of the cover main body 30a, a cover main body 30a, and a scattering suppression film 30c. And a label 30b interposed therebetween.

  The scattering suppression film 30c is made of a flexible resin such as polyurethane, for example. As a result, even if a large external force is applied to the cover body 30a while the vehicle 50 is running, etc., and the cover body 30a is cracked, the cover body 30a is held so as not to be scattered by the scattering suppression film 30c. Thus, the function of the fuse cover 30 can be maintained more reliably and safety can be maintained. Further, in the embodiment, a material having transparency is used as the material constituting the scattering suppression film 30c, and the label 30b has characters or designs that call the user's attention as shown in FIG. Information related to the fuse 22 is previously described. This makes it possible to visually recognize the characters and the like described on the label 30b from the outside, so that the user is alerted not to inadvertently touch the fuse cover 30 or the fuse 22 covered by the fuse cover 30 and more safe. Can be increased.

  In the embodiment, as shown in FIG. 5, the fuse 22 is attached to the case 27 so as to be positioned at one end side in the longitudinal direction of the battery pack 20. The battery pack 20 of the embodiment is mounted behind the rear seat 51 so that the longitudinal direction thereof coincides with the vehicle width direction of the vehicle 50 and the fuse cover 30 faces the trunk room 52. Therefore, when the battery pack 20 is mounted on the vehicle 50, the fuse 22 and the fuse cover 30 that protects the fuse 22 are arranged so that they can be easily reached from the trunk room 52, and are positioned closer to the side in the vehicle width direction. Will do. This makes it easier for the user to reach the fuse 22 and the fuse cover 30 from the trunk room 52, thereby improving the maintainability of the battery pack 20 and arranging the fuse 22 and the fuse cover 30 closer to the center in the vehicle width direction. Compared with the case where it was done, it becomes possible to improve safety | security by suppressing that a user touches the fuse cover 30 etc. carelessly.

  As described above, in the battery pack 20 of the embodiment, the fuse 22 for protecting the secondary battery 21 and the like is positioned so as to be exposed to the outside from the case 27 that accommodates the secondary battery 21 and the like. The fuse cover 30 is detachably attached to the fuse cover 30. Therefore, in a state where the fuse cover 30 is attached to the case 27 so as to cover the fuse 22, safety can be improved by preventing the user from inadvertently touching the fuse 22. Further, if the fuse cover 30 is removed from the case 27, the user can easily replace the fuse 22, so that the maintainability of the battery pack 20 can be further improved.

  The fuse cover 30 includes a cover main body 30a and a scattering suppression film 30c attached to the outer surface of the cover main body 30a. Therefore, even if a large external force is applied to the cover main body 30a and a crack occurs in the cover main body 30a, the cover main body 30a can be held so as not to be scattered by the flexible scattering suppression film 30c. The function as the fuse cover 30 can be more reliably maintained and the safety can be further improved. In addition, the scattering suppression film 30c is not restricted to what is affixed on the outer surface of the cover main body 30a, and it cannot be overemphasized that the same effect can be acquired even if it affixes on the inner surface of the cover main body 30a. .

  Furthermore, in the said Example, the label 30b which displays the information which consists of a character, a pattern, etc. which attracts a user's attention because the scattering suppression film 30c stuck on the outer surface of the cover main body 30a has transparency. Is interposed between the cover main body 30a and the scattering suppression film 30c, so that it is possible to alert the user not to touch the fuse cover 30 and the fuse 22 inadvertently. Can be increased.

  The battery pack 20 of the above embodiment is disposed behind the rear seat 51 of the vehicle 50, and the fuse 22 and the fuse cover 30 that protects the fuse 22 with respect to the case 27 so that the user can easily reach from the trunk room 52. Arranged. Thereby, since the user can replace the fuse 22 more easily, the maintainability of the battery pack 20 can be further improved. However, the mounting position of the battery pack 20 in the vehicle 50 is not limited to the back of the rear seat 51, and the battery pack 20 may be disposed in any part of the vehicle 50 as long as the user can easily reach the fuse 22 from the trunk room 52 or the like. It does not matter.

  Furthermore, in the above embodiment, the attachment positions of the fuse 22 and the fuse cover 30 with respect to the case 27 are determined so as to be located closer to the side in the vehicle width direction when the battery pack 20 is mounted on the vehicle 50. Therefore, it is possible to prevent the user from inadvertently touching the fuse 22 or the like compared to the case where the fuse 22 or the like is disposed closer to the center in the vehicle width direction, thereby further improving safety.

  Here, the correspondence between the main elements of the embodiment and the main elements of the invention described in the column of means for solving the problems will be described. That is, in the above-described embodiment, the battery pack 20 mounted on the vehicle 50 corresponds to the “on-vehicle power storage device”, and the secondary battery 21 including the first battery module 21a and the second battery module 21b is the “secondary battery”. The case 27 that accommodates the secondary battery 21 or the like corresponds to the “case”, and is connected in series between the first battery module 21a and the second battery module 21b to overcurrent the secondary battery 21 or the like. The fuse 22 that protects from a fuse corresponds to a “fuse”, and a fuse cover 30 that includes a cover main body 30a that is detachably attached to the case 27 and covers the fuse 22, and a scattering suppression film 30c that is attached to the cover main body 30a. A label 30b that corresponds to a “protective cover” and is interposed between the cover main body 30a and the scattering suppression film 30c corresponds to a “label”. However, the correspondence between the main elements of these embodiments and the main elements of the invention described in the column of means for solving the problems is the same as that of the invention described in the column of means for solving the problems by the embodiments. Since this is an example for specifically explaining the best mode for carrying out the invention, the elements of the invention described in the column of means for solving the problems are not limited. In other words, the examples are merely specific examples of the invention described in the column of means for solving the problem, and the interpretation of the invention described in the column of means for solving the problem is described in the description of that column. Should be done on the basis.

  The embodiments of the present invention have been described above using the embodiments. However, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the present invention. Needless to say.

  The present invention can be used in the in-vehicle power storage device manufacturing industry.

It is the schematic of the vehicle 50 carrying the battery pack 20 as a vehicle-mounted electrical storage apparatus which concerns on one Example of this invention. 2 is a block configuration diagram of a battery pack 20. FIG. 3 is an enlarged perspective view of a main part showing a peripheral portion of a fuse 22 of a battery pack 20. FIG. 4 is an exploded perspective view showing a fuse cover 30. FIG. It is explanatory drawing which shows the mounting position of the battery pack 20 when it sees from the vehicle back.

Explanation of symbols

  20 battery pack, 21 secondary battery, 21a first battery module, 21b second battery module, 22 fuse, 23 service plug, 24 current sensor, 25 battery electronic control unit (battery ECU), 26 buffer unit, 27 case, 30 fuse cover (protective cover), 30a cover body, 30b label, 30c scattering prevention film, 40 electronic control unit for hybrid (hybrid ECU), 42 inverter, 50 vehicle, 51 rear seat, 52 trunk room.

Claims (4)

An in-vehicle power storage device that has a secondary battery capable of outputting electric power and is mounted on a vehicle,
A case for housing the secondary battery;
A fuse incorporated in an electric circuit including the secondary battery and positioned to be exposed to the outside from the case;
A protective cover including a cover body that is detachably attached to the case and covers the fuse; and a scattering suppression film that is adhered to at least one of an outer surface and an inner surface of the cover body;
An in-vehicle power storage device.   The in-vehicle power storage device is disposed behind the rear seat of the vehicle, and the fuse is disposed in the case when the fuse is disposed when the in-vehicle power storage device is disposed behind the rear seat of the vehicle. The in-vehicle power storage device according to claim 1, wherein the on-vehicle power storage device is determined so as to be positioned on a cargo compartment side of the vehicle.   The arrangement position of the fuse in the case is determined so that the fuse is positioned closer to the side of the vehicle when the in-vehicle power storage device is arranged behind the rear seat of the vehicle. In-vehicle power storage device.   The said scattering suppression film has transparency, is affixed on the outer surface of the said cover main body, The label which displays predetermined information is interposed between the said cover main body and the said scattering suppression film. 4. The in-vehicle power storage device according to claim 3.

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