JP2019009009A - Battery cooling system - Google Patents

Abstract

To provide a battery cooling system which can be manufactured without lowering efficiency of assembly and can assemble a seal member in a desired position even if a film burr is formed in a through hole provided in a sealing member.SOLUTION: In the battery cooling system, a secondary battery module 1 is air-cooled. In at least one opening 14 of the secondary battery module 1, a ventilation path member 3 is provided so as to cover the opening. Cooling air is supplied or discharged through the ventilation path member 3. A seal member 2 provided at the peripheral edge portion of the opening is sandwiched between the ventilation path member and the secondary battery module to seal the peripheral edge of the opening. A projecting piece 22 for positioning is provided on the seal member 2, and a through hole 23 is formed in the projecting piece 22, while the ventilation path member 3 or the secondary battery module 1 are provided with a positioning pin 33 penetrating the through hole 23, a distal end portion 33a of the positioning pin is divided like a split pin having a gap of a predetermined interval.SELECTED DRAWING: Figure 1

Description

The present invention relates to a battery cooling system that cools an assembled battery in which a plurality of secondary batteries are combined. In particular, the present invention relates to an air-cooled battery cooling system that cools a secondary battery module including an assembled battery with cooling air.

In an electric vehicle, a hybrid vehicle, or the like, an assembled battery in which secondary batteries are assembled as a power source is used. In the process of charging or discharging, if the battery overheats or the temperature difference between the batteries becomes large, the battery performance deteriorates or the battery is damaged. Usually, these assembled batteries are stored in the battery case. Then, a secondary battery module is obtained, and cooling air is sent into the battery case to cool the assembled battery.

The battery used for the assembled battery includes a substantially flat battery such as a lithium ion battery, and such a battery is sometimes called a square battery because of its shape.
When a flat prismatic battery is configured as an assembled battery, it is flat so that the wide surfaces of the batteries are opposed to each other so that the cooling air is efficiently cooled. In general, prismatic batteries are arranged in a stacked state, and cooling batteries are sent to the gaps between the batteries to cool the batteries.
Moreover, the battery used for an assembled battery may be cylindrical. When the battery is cylindrical, the batteries are arranged at a predetermined interval, for example, in a staggered manner to form an assembled battery, which is a part of the battery module.

When cooling a battery module including such an assembled battery by an air cooling method, a case is provided so as to surround the assembled battery, a cooling air introduction port and a discharge port are provided in the case, and a duct for sending the cooling air is provided to them. It is common to configure a series of cooling air passages connected to the inlet and outlet. And if there is a place where air leaks in the cooling air passage, the cooling efficiency will be reduced or the cooling temperature will be likely to vary, so a seal member is provided at the connection part of the battery module case and duct. It is often done.

For example, Patent Document 1 discloses a technique in which a case member that faces an opening of a battery module is used like a duct of a cooling air passage, and a connection portion between the case member and the battery module is a sheet-like sealing member. And a technique for hermetically sealing. According to such a technique, inflow of high-temperature external gas into the cooling air passage is blocked, and a temperature gradient is prevented from being generated in the cooling air.

Japanese Patent Laid-Open No. 2001-283939

In recent years, as higher output and higher density of assembled batteries have been promoted, more efficient and reliable cooling performance has been required for cooling secondary battery modules than before. Therefore, a more reliable seal is required for the sealing structure of the cooling air passage in the battery cooling system as disclosed in Patent Document 1. In order to increase the reliability of the seal, it is necessary to attach the seal member in an accurate position and posture. This is because the sealing performance may be impaired if the sealing member is twisted or disposed so as to be disengaged from the sealing portion.

In order to attach the seal member in an accurate position and posture, a method of providing a seal groove and a method of positioning by providing a guide hole or a guide projection on the seal member are known. By providing a guide hole (for example, a through hole) in the seal member and positioning the pin provided on the counterpart member side so as to be inserted into the guide hole, the seal member can be positioned effectively.

By the way, the sealing member used for the cooling system of the battery module may have a three-dimensional shape with a complicated shape of the seal line. In addition, the seal member used in the battery module cooling system is often made of a relatively soft resin material. Therefore, the sealing member used in the battery module cooling system is typically integrally formed by injection molding. However, when a seal member having a through hole is formed by injection molding, a burr that stretches a film in the through hole portion that becomes a guide hole may occur.

If such a film-like burr is generated in the guide hole of the seal member, it is difficult to insert a pin provided on the counterpart member side. As a result, the positioning of the seal member may be inaccurate or the seal member may be twisted. Moreover, it is also a complicated operation to remove the film-like burrs generated in the through holes of the seal member, which reduces productivity when manufacturing the battery cooling system.

It is an object of the present invention to reduce the efficiency of assembly in a battery cooling system including a secondary battery module even when a film-like burr is generated in a through hole provided in the seal member in an operation of mounting the seal member. It is an object of the present invention to provide a battery cooling system that can be manufactured without using a sealing member and can be assembled in a desired position.

As a result of intensive studies, the inventor has provided a positioning pin that penetrates the through hole provided in the seal member on the mating member, and the tip of the positioning pin is like a split pin. Even if this occurred, it was found that the burrs could be easily broken at the tip of the positioning pin, and the above-mentioned problems could be solved, and the present invention was completed.

The present invention is a battery cooling system in which a secondary battery module is air-cooled with cooling air, and the secondary battery module includes an assembled battery in which a plurality of batteries are arranged with a predetermined gap therebetween, and 2 The secondary battery module is provided with two openings, and cooling air is guided from one opening to the other opening through the gap, so that at least one opening of the secondary battery module covers the opening. A ventilation path member is provided, cooling air is supplied to or discharged from the secondary battery module through the ventilation path member, and a seal member is provided at the peripheral edge of the opening. The seal member includes the ventilation path member and the secondary battery module. The peripheral edge of the opening is sealed, and a protruding piece for positioning is extended on the sealing member, and the protruding piece is provided with a through hole, while the ventilation path member is also provided. Is a battery cooling system in which the secondary battery module is provided with a positioning pin penetrating the through hole, and the tip of the positioning pin is divided like a split pin so as to have a gap of a predetermined interval. (First invention).

In the first invention, the tip of the positioning pin is preferably tapered (second invention). Furthermore, in the second invention, preferably, the positioning pin has a portion that increases in diameter as it goes from the tip to the back, and a portion that decreases in diameter as it goes from the tip to the back, more than the portion that increases in diameter. (The third invention). In the first to third inventions, preferably, the positioning pin is provided with an enlarged diameter portion for preventing excessive insertion of the protruding piece (fourth invention).

According to the battery cooling system (the first invention) of the present invention, even if a film-like burr is generated in the through hole of the seal member, the tip of the positioning pin is like a split pin. By pressing a film-like burr on the tip with your fingers, you can easily break the burr, and you can assemble it without reducing efficiency, and you can assemble the seal member accurately at the expected position. The effect that it can be obtained.

Furthermore, when it is made like 2nd invention, the precision of positioning of a sealing member is improved, making it easy to break a burr | flash.
Moreover, when it is made like 3rd invention or 4th invention, also about the attitude | position of a seal member, a seal member is attached accurately.

It is a disassembled perspective view which shows the structure of the battery cooling system of 1st Embodiment. It is a perspective view which shows the form of the positioning pin in 1st Embodiment. It is a three-plane figure which shows the form of the positioning pin in 1st Embodiment. It is a perspective view which shows the assembly | attachment state which made the positioning pin penetrate the through-hole of a sealing member in 1st Embodiment. It is a three-plane figure which shows the assembly | attachment state which made the positioning pin penetrate the through-hole of a sealing member in 1st Embodiment. It is a schematic diagram which shows a mode that the burr | flash formed in the through-hole is pressed on the front-end | tip part of a positioning pin. It is a figure which shows other embodiment of the positioning pin which has a different shape. It is a figure which shows other embodiment of the positioning pin arrange | positioned in a different position.

Hereinafter, the battery cooling system according to the first embodiment will be described with reference to the drawings, taking a battery cooling system for cooling an assembled battery for a hybrid vehicle as an example. FIG. 1 is an exploded perspective view showing the configuration of the battery cooling system of the present embodiment. Note that the present invention is not limited to the individual embodiments described below, and the embodiments can be changed and implemented.

The battery cooling system cools the secondary battery module 1 with cooling air. The battery cooling system has at least one ventilation path member 3, and the cooling air is supplied to or discharged from the secondary battery module 1 through the ventilation path member 3. On the upstream side and downstream side of the ventilation path member 3, other ventilation path members, blower fans, and the like are attached as necessary. The secondary battery module 1 may be singular or plural. In the present embodiment, the air cooling path member 3 is attached to each of the supply side and the exhaust side for one secondary battery module to constitute a battery cooling system. The assembly structure of these members may be a known configuration.

The secondary battery module 1 includes an assembled battery 11 configured by arranging a plurality of batteries 12 and 12 with a predetermined gap therebetween. In the present embodiment, the assembled battery 11 is configured by arranging the lithium ion batteries formed in a square plate shape as the battery 12 so as to be stacked at a predetermined interval. The battery may be a cylindrical battery.

In the secondary battery module 1, the assembled battery 11 is surrounded by a case 13. The case 13 has openings 14 and 14 on the cooling air supply side and the discharge side, respectively. In other words, the secondary battery module 1 is provided with two openings 14, 14, and the cooling air flowing from one opening 14 flows through the gap between the batteries 12, 12, and enters the other opening 14. The secondary battery module 1 is configured so that the cooling air is guided. As long as such an air flow can be realized, the specific configuration of the case 13 is not particularly limited.

The ventilation path member (duct member) 3 is provided on the side of at least one of the two openings 14, 14 provided in the secondary battery module 1. Cooling air is supplied to or discharged from the secondary battery module 1 through the ventilation path member 3. Like this embodiment, the ventilation path member 3 may be provided in the openings 14 and 14 on both sides, respectively. The ventilation path member 3 is provided in a cover shape so as to cover the opening 14. This cover-like portion corresponds to the duct wall 31 to be a ventilation path. Although the specific shape and structure of the ventilation path member 3 are not specifically limited, It is preferable that the ventilation path member 3 has the connection port 34 for connecting with another ventilation path member, a fan, an air cleaner, etc.

The seal member 2 is provided along the peripheral edge of the opening 14 in the opening 14 in which the ventilation path member 3 is provided. The seal member 2 is typically provided in an annular shape so as to surround the opening 14. The seal member 2 is sandwiched between the ventilation path member 3 and the secondary battery module 1 (case 13), and seals the peripheral edge of the opening. As long as the space between the ventilation path member 3 and the peripheral edge of the secondary battery module can be properly sealed, the seal member 2 may not be annular, and may be linear, for example. Moreover, the specific structure of the part which the ventilation path member 3 or the secondary battery module 1 clamps a sealing member is not specifically limited, Well-known structures, such as a flange structure, are employable. In the present embodiment, the ventilation path member 3 is formed with a flange portion 32, and the seal member 2 is configured to contact the flange portion 32.

The seal member 2 has a seal portion 21 and a protruding piece 22. The seal portion 21 is sandwiched between the flange portion 32 of the ventilation path member 3 and the secondary battery module 1 to seal the peripheral edge portion of the opening. The cross-sectional shape of the seal portion 21 is not particularly limited, and the seal portion 21 may be a flat sheet shape, a round string shape having a circular cross section such as an O-ring, or a square string. It may be a shape, may be a form in which a ridge is provided on a flat sheet, or may be a form in which a lip is provided as in this embodiment.

The sealing member 2 is provided with a positioning protruding piece 22 so as to extend from the sealing portion 21. The protruding piece 22 is provided with a through hole 23. The through hole 23 is penetrated by a positioning pin 33 described later, whereby the seal portion 21 is positioned at a correct position via the protruding piece 22. The protruding piece 22 in the present embodiment is formed to protrude from the seal portion 21 in a flat plate shape and is formed to be thick around the through hole 23. The specific form of the protruding piece 22 is as follows. There is no particular limitation. Although the number of the protruding pieces 22 may be one, it is preferable that a plurality of protruding pieces 22 are provided side by side along the periphery of the opening 14.

The seal member 2 is made of a flexible resin material. As the resin material, thermoplastic elastomer or rubber can be used. The preferred hardness of the resin material constituting the seal member 2 is 50 to 85 degrees in terms of duro A hardness.

The ventilation path member 3 or the secondary battery module 1 is provided with positioning pins 33 and 33 so as to pass through the through hole 23 of the protruding piece 22 of the seal member 2 when the battery cooling system is assembled. The positioning pin 33 may be provided on either the ventilation path member 3 or the secondary battery module 1. In the present embodiment, positioning pins 33 and 33 are provided on the ventilation path member 3.

In the present embodiment, as shown in FIGS. 1 to 3, the positioning pin 33 of the ventilation path member 3 extends in the direction (assembly direction) in which the ventilation path member 3 and the secondary battery module 1 are assembled. It is erected from the bottom surface of the duct wall 31. The direction in which the positioning pin 33 extends may be a different direction as long as the sealing member 2 is accurately positioned.

The tip 33a of the positioning pin 33 is divided like a split pin so as to have a gap of a predetermined interval. That is, the positioning pin 33 is split along the central axis of the pin with a predetermined width (gap) from the tip portion to a predetermined length. In the present embodiment, a cylindrical pin is divided like a split pin, so that a semi-cylinder having a semicircular tip surface is provided at the tip portion 33a of the positioning pin 33 so as to face each other. . The number of divisions may be two as in the present embodiment, but may be three, or four or more.

In the present embodiment, the positioning pin 33 is provided with an enlarged diameter portion 33 b that prevents excessive insertion of the protruding piece 22 of the seal member 2. The enlarged diameter portion 33b of the present embodiment is provided in a plate shape (rib shape) extending along the positioning pin 33, but the enlarged diameter portion is a columnar shape having a diameter larger than the diameter of the through hole, etc. Other forms may be used. When the enlarged diameter portion 33b is provided, the insertion amount of the protruding piece 22 of the seal member 2 with respect to the positioning pin 33 is more accurately defined, so that the posture of the seal member is also accurately determined and the seal member is twisted. Arrangement is suppressed.

When assembling the ventilation path member 3, the seal member 2, and the secondary battery module 1, first, corresponding positioning pins 33 and 33 are inserted into the through holes 23 and 23 provided in the projecting pieces 22 and 22 of the seal member. The seal member 2 is positioned with respect to the air passage member 3 so as to pass through each. This state is shown in FIGS. In this state, when the ventilation path member 3 is assembled to the secondary battery module 1, the seal member 2 is assembled at the correct position and posture.

In order to position the seal member 2 more accurately, it is preferable that the outer diameter of the positioning pin 33 and the inner diameter of the through hole 23 are substantially matched in the penetrating state. From the same viewpoint, it is also preferable that the through hole 23 is penetrated by the positioning pin 33 in a state where the diameter is slightly expanded in the penetrating state.

Manufacture of each member which comprises the said battery cooling system can be performed by a well-known method.
The case 13 and the ventilation path member 3 of the secondary battery module 1 can be manufactured by injection molding or blow molding of a synthetic resin, press working of a metal plate, or the like. The seal member 2 can be manufactured by rubber injection molding or the like.
The assembly of these members can be performed using known means such as bolting, fitting, fitting, locking by a claw, locking by a band, hook or the like.

The effects of the battery cooling system will be described. According to the battery cooling system, the projecting piece 22 having the through hole 23 is provided on the seal member 2 that seals between the ventilation path member 3 and the secondary battery module 1, and the ventilation path member 3 or the secondary battery module 1 is provided on the sealing path 2. Is provided with positioning pins 33 penetrating the through holes 23 to position them. Therefore, the sealing member 2 can be accurately positioned with respect to the ventilation path member 3 and the secondary battery module 1.

Furthermore, since the distal end portion 33a of the positioning pin 33 is divided like a split pin so as to have a gap of a predetermined interval, even if a film-like burr is stretched in the through hole 23 of the seal member, the distal end portion It is possible to break the burr easily by 33a so that the positioning pin 33 penetrates the through hole 23. That is, even if a film-like burr is stretched in the through hole 23 of the seal member, the positioning of the seal member 2 can be completed efficiently, and the production efficiency of the battery cooling system is not reduced.

The operation of breaking the film-like burr of the through hole 23 using the tip 33a of the positioning pin 33 is performed as follows. When there is a film-like burr, the tip 33a of the positioning pin stops at a position where it contacts the burr, and the pin does not enter the through hole any more.
In the case of a positioning pin whose tip is a split pin shape, with the tip of the pin in contact with a film-like burr, the surface of the burr is moved toward the positioning pin with fingers or a flexible material. Press. In FIG. 6, the pressing is represented by a plurality of arrows. Then, while the burr at the portion of the positioning pin in contact with the tip 33a is not pushed in, the portion where the tip 33a is not in contact with the back side of the burr (the hatched portion in the upper diagram of FIG. 6). , Bali is pushed in.

And since the front-end | tip part 33a of the positioning pin 33 is divided | segmented like a split pin so that it may have the space | gap of a predetermined space | interval, the front-end | tip part 33a becomes square shape seeing along the axial direction of a pin. The portion X exists, and in the vicinity of the corner portion X, the portion where the burr is not pushed is unevenly distributed so as to be surrounded by the portion where the burr is pushed. Then, the burrs are locally deformed at the angular portions X, and the burrs are torn starting from this portion, and the burrs can be broken using the tip portion 33a. That is, the tip 33a of the positioning pin 33 is divided like a split pin so as to have a gap of a predetermined interval, so that the burrs are simply pressed against the tip 33a of the pin with a finger or the like. The burr is easily broken.

In terms of burr breakability, if the tip of the positioning pin is a simple circle or ring with no splits, the area where the burr is pushed and the area where it is not pushed are in a uniform form that is continuous in the circumferential direction. In this form, local deformation of the burr hardly occurs and the burr is not easily broken. On the other hand, the distal end portion 33a of the positioning pin 33 of the above embodiment is formed in a split pin shape so as to have a gap of a predetermined interval. Therefore, when the burr is pressed with a finger or the like, local deformation is likely to occur, and the burr is broken. It becomes easy.

From the viewpoint of burr breakability, the size (width) g of the gap provided at the tip of the positioning pin is 0.05 ≦ g / D ≦ 0.6, where D is the diameter of the through hole. It is preferred that 0.1 ≦ g / D ≦ 0.5.

Furthermore, as in the embodiment described later (FIG. 7B), when the tip 33a of the positioning pin is tapered, the area of the burr that comes into contact with the tip of the pin is reduced, so that By pressing, it becomes possible to give a large local deformation to the burr, and the burr can be broken more easily. Further, when the tip end portion 33a of the pin is tapered, the clearance between the positioning pin 33 and the through hole 23 can be reduced, and the positioning accuracy of the seal member 2 can be improved. it can.

Further, as in an embodiment described later (FIG. 7D), the positioning pin has a portion (33g) whose diameter increases from the tip toward the back, and is located on the back side from the portion where the diameter is increased. In the case of having a portion (33h) whose diameter is reduced from the tip toward the back, the seal member 2 can be attached with high accuracy even with respect to the posture of the seal member 2. Since the protruding piece 22 of the seal member is provided so as to extend from the seal portion 21, the twist of the seal portion 21 of the seal member can be changed depending on where the protruding piece 22 comes in the length direction of the positioning pin. It can affect the posture such as rotation.
In the case of the positioning pin as in the embodiment of FIG. 7D, the protruding piece 22 having the through hole 23 is located on the back side of the diameter-reducing portion 33h at the correct assembly position of the seal member 2. By being provided, the protruding piece once inserted into the positioning pin is difficult to come out of the positioning pin, and the posture of the seal member 2 is stabilized.

Furthermore, as in the first embodiment, when the positioning pin 33 is provided with the enlarged diameter portion 33b that prevents excessive insertion of the protruding piece 22, excessive insertion of the protruding piece 22 is prevented. Thus, the sealing member 2 can be attached with high accuracy with respect to the posture of the sealing member 2.

The invention is not limited to the embodiment described above, and can be implemented with various modifications. Although other embodiments of the invention will be described below, in the following description, portions different from the above-described embodiment will be mainly described, and detailed descriptions of the same portions will be omitted. Moreover, these embodiments can be implemented by combining some of them or replacing some of them.

FIG. 7 shows another example of the positioning pin. All of the positioning pins are common in that the tip of the positioning pin is divided like a split pin so as to have a gap of a predetermined interval. Even in these types of positioning pins, burrs generated in the through holes of the seal member can be easily broken.

In the example of FIG. 7A, the edge 33f facing the gap 33d at the tip of the pin is configured to protrude at the center 33n of the pin. Even in such a form, when the burr is pressed at the protruding portion (the center portion 33n) of the edge portion 33f, the burr is likely to be locally deformed, and the burr is easily broken.
Further, contrary to the example of FIG. 7A, even if the edge 33f in contact with the gap 33d at the tip of the pin protrudes at the peripheral edge of the pin, similarly, When the burr is pressed at the protruding portion (peripheral portion), the burr is likely to be locally deformed, and the burr is easily broken.

In the example of FIG. 7B, the tip end portion of the positioning pin is tapered. When this is done, the area where the tip of the pin and the burr come into contact is reduced, the burr is more likely to break, and the gap between the hole and the pin is reduced when the pin passes through the through hole. The positioning accuracy can also be improved. Moreover, in the example of Fig.7 (a) and FIG.7 (b), the enlarged diameter part which prevents the excessive insertion of the protrusion piece like 1st Embodiment is not provided in the positioning pin. The enlarged diameter portion is not essential.

In the example of FIG. 7C, the tip of the positioning pin is divided into four split pins. The number of divisions may be two as in the first embodiment, but may be three, four as in the present embodiment, or more. In the example of FIG. 7C, the enlarged diameter portion 33b 'provided on the positioning pin is formed in a cylindrical shape, and the entire positioning pin is shaped like a stepped pin.

In the example of FIG. 7D, the positioning pin has a portion 33 g that increases in diameter as it goes from the tip to the back, and a portion that decreases in diameter as it goes from the tip to the back, closer to the back than the portion that increases in diameter. 33h. In the case of such a positioning pin, by providing the protruding piece 22 having the through hole 23 at the back side of the portion 33h whose diameter is reduced at the correct assembly position of the seal member 2, the pin is temporarily attached. There is also an effect that it becomes difficult for the inserted protruding piece 22 to come out of the positioning pin 33. Therefore, the sealing member 2 can be attached with high accuracy with respect to the posture of the sealing member 2.
Further, in the example of FIG. 7D, a portion 33k that increases in diameter as it goes from the tip to the back is provided further on the back side than the portion 33h that reduces the diameter, and the portion 33k that increases in diameter is a protruding piece. It functions as a diameter-expanded portion that prevents excessive insertion. Then, a small-diameter portion 33j is provided between the diameter-reducing portion 33h and the diameter-expanding portion 33k. If the protruding piece 22 of the seal member is fitted into the small-diameter portion 33j, the posture of the seal member As for the sealing member 2, the sealing member 2 can be attached particularly accurately.

When the positioning pin 33 is provided with an enlarged diameter portion 33b that prevents excessive insertion of the protruding piece 22, as shown in the example of FIG. A diameter portion may be provided, or an enlarged diameter portion may be provided in a part of the circumferential direction as in the first embodiment shown in FIGS. As long as excessive insertion of the protruding piece 22 can be prevented, the form of the diameter expansion is not particularly limited.

FIG. 8 shows another embodiment in which the installation location of the positioning pin is changed. In this embodiment, the positioning pin 33 extends so as to protrude from the side surface of the duct wall 31 of the ventilation path member 3, that is, in a direction orthogonal to the direction in which the ventilation path member 3 and the secondary battery module 1 are assembled. Exists and is provided. The extending direction of the positioning pin 33 is not particularly limited as long as the sealing member 2 is appropriately positioned. The protruding piece 22 and the through hole 23 of the seal member 2 may be set according to the form in which the positioning pin is provided. Further, the positioning pin is not necessarily provided in the ventilation path member 3, and may be provided in the secondary battery module 1.

In the battery cooling system according to the first embodiment, the positioning pin 33 is provided inside the ventilation path member 3. However, the positioning pin 33 is provided outside the ventilation path member 3 and the secondary battery module 1. It may be a thing. If the positioning pin 33 is provided on the outside, it is easy to visually check whether the seal member is assembled in the correct position and posture after the battery cooling system is assembled.

In the description of the above embodiment, the secondary battery module has been described mainly with an example including an assembled battery in which plate-shaped square batteries are stacked, but the specific configuration of the secondary battery module is not particularly limited, The secondary battery module may include, for example, an assembled battery in which cylindrical batteries are arranged in a staggered manner, or may include an assembled battery of another form.

The target to which the secondary battery module is applied is not limited to an electric vehicle or a hybrid vehicle, but is attached to a secondary battery module mounted on a vehicle such as a ship or an aircraft, a generator, a solar panel, or the like. The battery cooling system can be applied to secondary battery modules for various uses such as secondary battery modules.

The battery cooling system can be used, for example, for cooling a secondary battery module such as a hybrid vehicle. The battery can be efficiently air-cooled and has high industrial utility value.

DESCRIPTION OF SYMBOLS 1 Secondary battery module 11 Battery assembly 12 Battery 13 Case 14 Opening 2 Sealing member 21 Sealing part 22 Protruding piece 23 Through-hole 3 Ventilation path member (duct member)
31 Duct Wall 32 Flange 33 Positioning Pin 33a Tip 33b Expanded Diameter 34 Connection Port

Claims (4)

A battery cooling system for cooling a secondary battery module with cooling air,
The secondary battery module includes an assembled battery in which a plurality of batteries are arranged with a predetermined gap therebetween, and the secondary battery module is provided with two openings, and the gap is provided from one opening. Through which the cooling air is directed to the other opening,
At least one opening of the secondary battery module is provided with a ventilation path member so as to cover the opening, and cooling air is supplied to or discharged from the secondary battery module through the ventilation path member, and the peripheral edge of the opening is sealed. A member is provided, and the sealing member is sandwiched between the ventilation path member and the secondary battery module, and seals the peripheral edge of the opening.
The seal member is provided with a positioning protruding piece, and the protruding piece is provided with a through hole, while the ventilation path member or the secondary battery module is provided with a positioning pin that penetrates the through hole,
The tip of the positioning pin is divided like a split pin so as to have a gap of a predetermined interval.
Battery cooling system. The battery cooling system according to claim 1, wherein a distal end portion of the positioning pin has a tapered shape. The battery cooling according to claim 2, wherein the positioning pin has a portion that increases in diameter as it goes from the tip to the back, and has a portion that decreases in diameter as it goes from the tip to the back, on the back side of the portion that increases in diameter. system. The battery cooling system according to any one of claims 1 to 3, wherein the positioning pin is provided with an enlarged diameter portion that prevents excessive insertion of the protruding piece.

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