JP2007294290A - Power storage pack - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a battery pack having high cooling performance in a power storage pack equipped with power storage equipment. <P>SOLUTION: The battery pack 1 is mounted on a vehicle equipped with a floor member 52 and a rear seat 62 arranged on the upper side of the floor member 52. The battery pack 1 is equipped with a case 20 installing a secondary battery on the inside. The battery pack 1 is equipped with an air supply pipe 11 connected to the case 20 and supplying air for cooling the secondary battery. The air supply pipe 11 is installed between the floor member 52 and the rear seat 62. A rib 15 is installed between the air supply pipe 11 and the floor member 52. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a power storage pack including a power storage device.

  In recent years, an electric vehicle using an electric motor as a drive source and a so-called hybrid electric vehicle in which an electric motor as a drive source and another drive source (for example, an internal combustion engine, a fuel cell, etc.) are combined have been put into practical use. In such an automobile, a power storage device for supplying electricity as energy to the electric motor is mounted. Examples of the power storage device include a secondary battery and a capacitor that can be repeatedly charged and discharged. The power storage device is housed in a power storage case and mounted on a vehicle as a power storage pack.

  As the secondary battery, a nickel-cadmium battery, a nickel-hydrogen battery, a lithium ion battery, or the like is used. The secondary battery includes, for example, a battery module in which battery cells are stacked. The battery module generates heat due to an electrochemical reaction inside each battery cell, and the temperature rises. Since the power generation efficiency of the battery module decreases when the temperature rises, for example, cooling air is introduced into the power storage pack from the outside of the power storage case to cool the battery module.

  In Japanese Patent Laid-Open No. 2002-166728, a high temperature heated by heat radiated from a battery case by partitioning a corner farthest from a battery case of a high voltage battery housing chamber that houses a high voltage battery cooling device by a partition plate. A cooling structure for a high-voltage battery is disclosed in which a cooling air introduction chamber is configured so that no air is sucked. In this cooling structure, the air intake slit communicating with the passenger compartment of the vehicle and the intake port of the intake blower are opened to the cooling air introduction chamber, and the intake port and the air intake slit are directly provided in the cooling air introduction chamber. A shielding plate is provided so as not to face each other. According to this high-voltage battery cooling structure, it is disclosed that a high-voltage battery cooling structure can be efficiently cooled, and noise such as a cooling fan can be cut off to provide a quiet high-voltage battery cooling structure.

  Japanese Patent Application Laid-Open No. 2001-233064 discloses a cooling air intake structure for a high-voltage battery of a vehicle, in which a high-voltage battery is placed under a rear seat and covered with a cover. In this cooling air intake structure, an air path is formed by providing a gap extending in the vehicle width direction between the lower front end of the rear seat and the upper front end of the cover, and an intake port is provided in the cover in the air path for suction. The mouth and battery case are connected by an air intake duct. In this cooling air intake structure, it is disclosed that the suction port is not blocked by luggage or the like, and the air suction sound from the suction port can be prevented from becoming an occupant's ear.

In Japanese Patent Application Laid-Open No. 2004-220799, when the battery temperature is equal to or higher than a predetermined temperature, at least the air blowing direction from the air conditioner to the room is set to the air intake side in the state where the air conditioner is in the outside air introduction mode. A battery cooling device directed to is disclosed. According to this battery cooling device, it is disclosed that the air blown out from the air conditioner can be reliably introduced into the battery cooling device, and the battery can be reliably cooled. Further, in this publication, it is disclosed that the air inlet of the battery cooling device is installed on the rear side of the vehicle such as the rear tray and the lower side of the rear seat, and that the air intake port is installed on the lower side of the room. Has been.
JP 2002-166728 A Japanese Patent Laid-Open No. 2001-233064 JP 2004-220799 A

  A power storage pack including a secondary battery, a capacitor, and the like may be disposed below the seat as disclosed in the above Japanese Patent Application Laid-Open No. 2001-233304. In addition, the electricity storage pack may be disposed behind the rear seat. For example, the electricity storage pack may be arranged in a trunk room.

  In order to cool the electricity storage pack, it is necessary to take in air. In a passenger compartment in which a person lives, the temperature is appropriately adjusted by an air conditioner in the passenger compartment, so that air at a stable temperature stays. For this reason, it is suitable to use indoor air for cooling the electricity storage pack.

  In the above Japanese Unexamined Patent Application Publication No. 2004-220799, it is disclosed that the air in the passenger compartment is used as the cooling air for the battery, but the specific arrangement and configuration of the devices are not disclosed.

  An object of this invention is to provide the electrical storage pack excellent in cooling performance.

  A power storage pack according to the present invention is a power storage pack mounted on a vehicle including a floor member and a seat disposed above the floor member, and includes a case in which a power storage device is disposed. An air supply pipe connected to the case for supplying air for cooling the power storage device is provided. The air supply pipe is disposed between the floor member and the seat. A cooling structure in which a heat insulating means is disposed between the air supply pipe and the floor member;

  Preferably, in the above invention, the air supply pipe has an intake port. The intake port is disposed at the front end of the rear seat of the vehicle.

  Preferably, in the above invention, the heat insulating means includes a rib disposed on the surface of the floor member and formed to support the air supply pipe. The rib is formed so that a gap is formed between the floor member and the air supply pipe.

  In the above invention, preferably, the heat insulating means includes a plurality of the ribs. The ribs are spaced apart from each other.

  Preferably, in the above invention, the air supply pipe has an intake port. The air supply pipe is disposed in a notch formed in the rear seat of the vehicle. In the air supply pipe, the intake port is disposed at a lower portion of the rear seat.

  Preferably, in the above invention, the case is disposed on the rear side of the rear seat of the vehicle.

  ADVANTAGE OF THE INVENTION According to this invention, the electrical storage pack excellent in cooling performance can be provided.

  With reference to FIGS. 1-6, the electrical storage pack in embodiment based on this invention is demonstrated.

  Power storage devices such as secondary batteries and capacitors are housed in cases and mounted on automobiles. In the present invention, a device including a power storage device and a case of the power storage device is referred to as a power storage pack. The power storage pack may include other internal components. Other internal components include, for example, an electric device that converts electric power.

  In FIG. 1, the 1st schematic sectional drawing of the battery pack as an electrical storage pack in this Embodiment is shown. FIG. 1 is a schematic cross-sectional view when the vehicle body is cut along a plane extending in the vertical direction. The battery pack 1 in the present embodiment is mounted on a so-called sedan type automobile among the automobiles. An arrow 90 indicates the front side of the vehicle body. Battery pack 1 in the present embodiment includes a secondary battery. In the present embodiment, among the secondary batteries, a lithium ion battery is arranged.

  The automobile in the present embodiment includes a plurality of seats. The automobile includes a rear seat 62. The rear seat 62 is the rearmost seat among the seats arranged. The rear seat 62 is disposed on the upper side of the floor member 52. The rear seat 62 is fixed to the upper surface of the floor member 52.

  Battery pack 1 includes a case 20. A secondary battery as a power storage device is arranged inside the case 20. The case 20 includes an upper case 21 and a lower case 22. The lower case 22 is formed in a plate shape. Upper case 21 is formed to cover the internal secondary battery.

  A partition panel 63 is disposed on the rear side of the rear seat 62. The partition panel 63 partitions the vehicle compartment and the trunk room 64. In battery pack 1 according to the present embodiment, the battery pack body including power storage device and case 20 is arranged in trunk room 64. The case 20 is disposed on the rear side of the rear seat 62. The case 20 is disposed on the upper surfaces of the mounts 55 and 56. The battery pack 1 is supported so as to be substantially horizontal when viewed from the side.

  Battery pack 1 in the present embodiment has air supply pipe 11 connected to case 20. The air supply pipe 11 is formed in a tubular shape. The air supply pipe 11 is formed so as to supply air into the case 20. The air supply pipe 11 is formed so as to supply air for cooling the power storage device. One end of the air supply pipe 11 is connected to the upper case 21. The air supply pipe 11 has an air inlet 11a at the other end.

  The rear seat 62 in the present embodiment has a notch 62a. The notch 62 a is formed at the lower end of the rear seat 62. The notch 62 a is formed so as to extend along the air supply pipe 11.

  The air supply pipe 11 is disposed below the rear seat 62. The air supply pipe 11 is disposed in the notch 62 a of the rear seat 62. The air supply pipe 11 is formed so as to cross the partition panel 63 and the rear seat 62. The air supply pipe 11 is disposed so as to extend between the floor member 52 and the rear seat 62. The intake port 11a is arranged so that air in the vehicle compartment can be taken in. The intake port 11 a in the present embodiment is disposed at the front end of the rear seat 62. The intake port 11 a is disposed at the lower part of the rear seat 62.

  A heat insulating means is disposed between the air supply pipe 11 and the floor member 52. The heat insulating means in the present embodiment has ribs 15. In the present embodiment, a plurality of ribs 15 are arranged. The ribs 15 are disposed on the surface of the floor member 52 and are formed to support the air supply pipe 11. The rib 15 is formed so that a gap is generated between the floor member 52 and the air supply pipe 11. The respective ribs 15 are arranged at intervals from each other in the direction in which the air supply pipe 11 extends.

  The rib 15 in the present embodiment is formed of a member having low heat conductivity. The rib in the present embodiment is formed of a member having heat resistance. The rib 15 is made of, for example, a resin having heat resistance.

  In the automobile in the present embodiment, an exhaust pipe 65 for releasing exhaust from the engine is disposed below the floor member 52. The exhaust pipe 65 is formed to extend substantially along the shape of the floor member 52.

  FIG. 2 is a schematic cross-sectional view of a battery pack case portion in the present embodiment. FIG. 2 shows the rear part of the vehicle body. The automobile includes a body 61. The body 61 is formed so as to be substantially rectangular when viewed from above. A rear wheel 60 is disposed at the rear of the vehicle body.

  Case 20 of battery pack 1 in the present embodiment is arranged at the rear of the vehicle body. At the front end portion of the case 20, the upper case 21 and the lower case 22 are fixed by bolts 78, and the case 20 is fixed to the mount 55. The mount 55 is fixed to the side member 50 by bolts 74. Further, at the rear end of the case 20, the upper case 21 and the lower case 22 are fixed by bolts 73.

  The lower case 22 of the case 20 in the present embodiment has leg portions 28. Leg portion 28 is formed to extend from the main body of battery pack 1 to the upper side of side member 50. At the rear end of the battery pack 1, the leg portion 28 is fixed to the mount 56 with a bolt 71.

  The air supply pipe 11 in the present embodiment is formed so as to extend from the case 20 toward the front side. The air supply pipe 11 is connected to one end of the case 20 in the width direction of the vehicle body.

  Battery pack 1 in the present embodiment has an air discharge pipe 12 for discharging the air that has cooled the internal power storage device. One end of the air discharge pipe 12 in the present embodiment is connected to the upper case 21. The air exhaust pipe 12 is connected to one end of the case 20 in the width direction of the vehicle body. The air exhaust pipe 12 has an exhaust port 12a at the other end. The discharge port 12a is arrange | positioned so that air may be discharged | emitted out of a vehicle.

  The air discharge pipe in the present embodiment is formed so as to discharge the cooled air to the outside of the vehicle, but is not limited to this form. For example, the air discharge pipe may be formed so as to discharge air into a trunk room or luggage room. I do not care.

  FIG. 3 shows a schematic exploded perspective view of the support member in the present embodiment. Referring to FIGS. 2 and 3, the vehicle in the present embodiment includes a support member formed to support case 20 of battery pack 1.

  The support member includes a side member 50, a cross member 51, and a floor member 52. The side member 50 constitutes a part of the body of the vehicle body. The side members 50 are disposed on both sides in the width direction of the vehicle body. The side member 50 is formed to extend in the front-rear direction of the vehicle body.

  A floor member 52 is disposed on the upper surface of the side member 50. The floor member 52 is formed in a plate shape. The floor member 52 is disposed so as to straddle between the side members 50 disposed on both sides in the width direction of the vehicle body. The mounts 55 and 56 are fixed to the surface of the floor member 52. Cross member 51 in the present embodiment is formed to fix side members 50 to each other. The rear seat is disposed in the recess 52 a of the floor member 52.

  With reference to FIGS. 2 and 3, the case 20 of the battery pack 1 is supported by the side member 50 through the mount 55 and the floor member 52 at the front end. The rear end of the case 20 is supported by the side member 50 via the mount 56 and the floor member 52.

  FIG. 4 is a schematic cross-sectional view of the battery pack and the rear seat in the present embodiment. The exhaust pipe 65 is connected to the muffler 66. The exhaust pipe 65 is formed to extend from the front side to the rear side of the vehicle body. The exhaust pipe 65 in the present embodiment is formed so as to extend along with the air supply pipe 11. The exhaust pipe 65 is disposed so as to intersect the air supply pipe 11 when the vehicle is seen through in plan view from the upper part to the lower part in the direction of gravity.

  FIG. 5 shows a schematic front view of the lower end portion of the rear seat in the present embodiment. In the present embodiment, a notch 62 a is formed at one end of the widthwise ends of the rear seat 62. The notch 62 a is formed along the cross-sectional shape of the air supply pipe 11. The air supply pipe 11 in the present embodiment is formed so that the cross-sectional shape is rectangular. The air supply pipe 11 is formed such that the longitudinal direction of the rectangle is substantially parallel to the width direction of the vehicle body.

  When the air supply pipe 11 is viewed from the front, ribs 15 are disposed at both ends of the air supply pipe 11 in the width direction. In the present embodiment, the ribs 15 are formed apart from each other in the direction perpendicular to the direction in which the air supply pipe 11 extends.

  The electricity storage pack in the present embodiment includes an air supply pipe disposed between the floor member and the seat. With this configuration, the air in the passenger compartment on the front side of the seat can be taken in. Since the temperature of the air in the passenger compartment is substantially constant by the air conditioner in the passenger compartment, the power storage pack can be cooled stably.

  Further, since the heat insulating means is arranged between the air supply pipe and the floor member, the temperature of the air supply pipe rises through the floor member even if a high temperature member is arranged below the floor member. Can be prevented. As a result, the temperature of the air for cooling the power storage device can be kept low.

  For example, referring to FIG. 4, in the present embodiment, exhaust pipe 65 for exhausting the engine intersects with air supply pipe 11. Even in this case, it is possible to suppress an increase in the temperature of the cooling air inside the air supply pipe 11.

  In the present embodiment, the case of the electricity storage pack is arranged on the rear side of the rear seat. With this configuration, even when the power storage pack body is arranged in a trunk room or the like, the power storage device can be cooled using air in the vehicle compartment.

  The heat insulating means in the present embodiment includes a rib, and the floor member and the air supply pipe are separated from each other to form a gap. Air exists in this gap. With this air layer, a heat insulating layer that suppresses heat transfer between the floor member and the air supply pipe can be formed. That is, the heat insulating layer can be formed of air.

  By forming the heat insulating layer with air, convection occurs between the ribs, and air flows. For this reason, it can suppress that the temperature of the air between a seat and a floor member rises, and can obtain the heat insulation effect effectively.

  The heat insulating means in the present embodiment includes a plurality of ribs, and the plurality of ribs are arranged at intervals. With this configuration, a large space can be formed between the ribs, and an air layer interposed between the floor member and the air supply pipe can be enlarged.

  In the present embodiment, ribs are formed between the air supply pipe and the floor member as the heat insulating means. However, the heat insulating means is not limited to this form, and the heat insulating means heats between the floor member and the air supply pipe. It does not matter as long as it is formed so as to inhibit the transmission. For example, the heat insulating member may be arranged uniformly on the surface of the floor member, and the air supply pipe may be arranged on the surface of the heat insulating member.

  In the air supply pipe in the present embodiment, the air inlet is disposed at the front end of the seat. In addition, an air inlet is disposed in the lower part of the seat. With any one of these configurations, it is possible to take in low-temperature air from the passenger compartment air. As a result, the power storage device can be effectively cooled.

  In the present embodiment, the air supply pipe is arranged between the rear seat and the floor member among the seats, but is not limited to this form, and the air supply pipe is arranged between any seat and the floor member. can do.

  The power storage device of the power storage pack in the present embodiment is a lithium ion battery. Lithium ion batteries generate less heat than nickel-metal hydride batteries and require less airflow for cooling. For example, compared to a conventional nickel metal hydride battery, a lithium ion battery requires approximately 1/2 of the air volume required for cooling. For this reason, the flow path cross-sectional area of an air supply pipe can be made small, and this invention can be implemented easily.

  Although the lithium ion battery is arrange | positioned as an electrical storage apparatus in the electrical storage pack in this Embodiment, it is not restricted to this form, For example, other secondary batteries, such as a nickel metal hydride battery, and a capacitor may be arrange | positioned. .

  In the present embodiment, the cross-sectional shape of the air supply pipe is formed to be a quadrangle, but is not limited to this form, and any shape can be adopted. Moreover, in this Embodiment, although the air supply pipe was arrange | positioned at one edge part of a rear seat, it is not restricted to this form in particular, An air supply pipe can be arrange | positioned in arbitrary positions. For example, a notch portion may be formed in a substantially central portion in the seat width direction, and the air supply pipe may be disposed in the notch portion.

  In FIG. 6, the schematic front view of the other electrical storage pack in this Embodiment and a rear seat is shown. Other power storage packs have a large intake port for the air supply pipe. The rear seat 66 has a notch 66a. The notch 66a is formed over substantially the entire width of the rear seat 66 in the vehicle body direction. The air supply pipe 13 is disposed inside the notch 66a. The air supply pipe 13 is formed in a rectangular shape whose cross-sectional shape extends in the width direction of the vehicle body. The air supply pipe 13 is fixed to the floor member 52 by the rib 15. The air inlet 13 a is disposed at the lower part of the front end of the rear seat 66.

  In another electricity storage pack of the present embodiment, the cross-sectional area of the flow path of the air supply pipe can be increased, and the pressure loss of the air supply pipe can be reduced. As a result, it is possible to increase the flow rate of the air that cools the electricity storage pack, or to reduce the load on the blower for sending air. Thus, arbitrary forms can be adopted as the size and shape of the notch portion of the seat and the air cooling pipe.

  In the respective drawings described above, the same or corresponding parts are denoted by the same reference numerals.

  In addition, the said embodiment disclosed this time is an illustration in all the points, Comprising: It is not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and includes all modifications within the scope and meaning equivalent to the terms of the claims.

It is the 1st schematic sectional view of the part of the electrical storage pack and the backseat in an embodiment. It is a schematic sectional drawing of the rear part of the motor vehicle in an embodiment. It is a general | schematic disassembled perspective view of the supporting member for supporting the electrical storage pack in embodiment. It is a 2nd schematic sectional drawing of the part of the electrical storage pack in an embodiment, and a rear seat. It is a schematic front view of the edge part of the rear seat in embodiment. It is a schematic front view of the other electrical storage pack and air supply pipe in an embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Battery pack, 11, 13 Air supply pipe, 11a, 13a Intake port, 12 Air exhaust pipe, 12a Exhaust port, 15 Rib, 20 case, 21 Upper case, 22 Lower case, 28 Leg part, 50 Side member, 51 Cross member , 52 Floor member, 52a Recess, 55, 56 mount, 60 Rear wheel, 61 Body, 62, 66 Rear seat, 62a, 66a Notch, 63 Partition panel, 64 Trunk room, 65 Exhaust pipe, 66 Muffler, 71, 73 74, 78 Volts, 90 arrows.

Claims (6)

A power storage pack mounted on a vehicle comprising a floor member and a seat disposed on the upper side of the floor member,
A case where power storage devices are arranged inside,
An air supply pipe connected to the case for supplying air for cooling the power storage device;
The air supply pipe is disposed between the floor member and the seat;
An electricity storage pack having a cooling structure in which a heat insulating means is disposed between the air supply pipe and the floor member. The air supply pipe has an air inlet;
The electricity storage pack according to claim 1, wherein the intake port is disposed at a front end of a rear seat of the vehicle. The heat insulating means includes a rib disposed on the surface of the floor member and formed to support the air supply pipe,
The electricity storage pack according to claim 1 or 2, wherein the rib is formed so that a gap is formed between the floor member and the air supply pipe. The heat insulating means includes a plurality of the ribs,
The electricity storage pack according to claim 3, wherein the ribs are arranged at intervals. The air supply pipe has an air inlet;
The air supply pipe is disposed in a notch formed in a rear seat of the vehicle,
5. The electricity storage pack according to claim 3, wherein the air supply pipe has the intake port disposed at a lower portion of the rear seat.   The electricity storage pack according to any one of claims 1 to 5, wherein the case is disposed on a rear side of a rear seat of the vehicle.

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