JP2006035941A - Power source device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To certainly waterproof a coupling portion of a set screw, while fastening the set screw with sufficient torque and securely coupling a cover plate to a case main body. <P>SOLUTION: In the power source device for a vehicle, the cover plate 4 for blocking an opening portion of the case main body 1A is fixed by the set screw 23. The set screw 23 screws into the case main body 1A by penetrating a washer 26, cushion material 27, and the cover plate 4. The washer 26 has a peripheral wall 26B projecting out toward the cover plate 4 along the outer periphery of a disc portion 26A. The suction material 27 has thickness d in a non-compressing state thicker than the height h of the peripheral wall 26B, and is arranged in the peripheral wall of washer 26. The set screw 23 is screwed in to the case main body until fastening end, and a peripheral wall tip end edge of the washer 26 is pressed against the surface of the cover plate 4. The cushion material 27 is compressed by the disc portion 26A of the washer 26 and the cover plate 4 to have a waterproof structure. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention mainly relates to a power supply device for a large current used for powering a motor for driving a vehicle such as a hybrid vehicle or an electric vehicle, and more particularly to a power supply device having a waterproof structure for a case housing a battery.

  An automobile such as an electric vehicle that runs on a motor or a hybrid car that runs on both a motor and an engine is equipped with a power supply device that houses a battery in a case. In this power supply device, since the motor vehicle is driven by a motor, in order to increase the output, a large number of batteries are connected in series to increase the output voltage. For example, the voltage of a battery for electrical equipment mounted on an automobile is almost 12V with no exceptions, but the output voltage of a power supply device that drives a motor for traveling is generally an extremely high voltage of 200V or more.

  This power supply apparatus can protect a battery by using a case that houses the battery as a waterproof structure. This is because water that enters the case corrodes or rusts the battery and internal metal parts. Moreover, the water which penetrates into the case may cause electric leakage or electric shock. Since the power supply device is mounted, for example, under the floor panel, a waterproof structure that does not allow indoor water to enter is required.

  Further, in order to maintain a large number of stored batteries, the power supply device is housed in a case body having an upper opening, and the upper opening of the case body is closed with a removable cover plate. In the case of this structure, it is necessary to fix the cover plate to the case body with a waterproof structure. The cover plate is fixed to the case main body with a set screw penetrating the cover plate so as to be detachable. Therefore, it is necessary to fix the cover plate to the case main body with a waterproof structure as a set screw. The waterproof structure of the set screw can be realized by sandwiching a packing between the screw head of the set screw and the cover plate. However, this structure cannot tighten the set screw with sufficient torque. This is because if the set screw is tightened strongly, the packing is crushed and deformed and damaged. Moreover, when screwing a set screw, there is also a disadvantage that the screw head rotates and is rubbed and damaged. The disadvantage that the packing is damaged by the rotating screw head can be solved by inserting a washer between the set screw and the cover plate and sandwiching the packing between the washer and the cover plate. However, this structure can be waterproof between the washer and the cover plate, but cannot be waterproof between the washer and the screw head.

By the way, a unique waterproof structure in which a waterproof structure is provided between the washer and the cover plate has been developed (see Patent Document 1).
JP-A-11-303293

  As shown in FIG. 1, the waterproof washer 40 described in this publication is provided with a downward holding groove 41 along the outer periphery. The holding groove 41 is provided with a bent piece 42 by bending the lower end edge at a right angle in the facing direction so that the width of the opening is narrowed. The holding groove 41 is provided with a packing 43 having an E-shaped cross section so as not to come off. In the waterproof washer 40, the bent piece 42 is pressed against the surface of the cover plate 45 when the set screw 44 is tightened. However, this waterproof washer also has a drawback that the set screw cannot be tightened with a strong torque. This is because, if the set screw is tightened with a strong torque, the tightening force of the set screw acts directly on the packing and damages the packing. For this reason, the torque of a set screw is restrict | limited and there exists a fault which cannot fix a cover plate to a case main body firmly. Further, the forcibly tightened packing is likely to deteriorate and break, and it is difficult to provide sufficient durability.

  The present invention was developed to solve this drawback, and an important object of the present invention is to fasten the set screw with sufficient torque and firmly connect the cover plate to the case body while An object of the present invention is to provide a power supply device for a vehicle that can reliably waterproof a connecting portion of a screw.

  The vehicle power supply device of the present invention includes a case body 1A in which a case 1 housing a battery has an upper opening, a cover plate 4 that closes the opening of the case body 1A, and a cover plate 4 Is fixed to the case main body 1A, a washer 26 disposed between the set screw 23 and the cover plate 4, and a non-passage disposed between the washer 26 and the cover plate 4. An aqueous cushioning material 27 is provided. The cover plate 4 opens a fixing hole 25 through which a set screw 23 fixed to the case main body 1A is passed. The set screw 23 passes through the washer 26, the cushion material 27, and the cover plate 4, and screws the screw portion 23B into the case main body 1A to fix the cover plate 4 to the case main body 1A. The washer 26 has a peripheral wall 26B that protrudes toward the surface of the cover plate 4 along the outer periphery of the disk portion 26A. The cushion material 27 has a thickness (d) in a non-compressed state thicker than a height (h) of the peripheral wall 26B, and is deformed from a non-compressed state to a compressed state, and has an outer peripheral surface along the inner surface of the peripheral wall 26B. It is arranged in the peripheral wall of the washer 26 so as to be moved and compressed. The set screw 23 passes through the washer 26, the cushion material 27, and the cover plate 4 and is screwed in until the case body 1A is fastened. The washer 26 presses the leading edge of the peripheral wall 26B against the surface of the cover plate 4, and the cushion The material 27 is compressed by the disk portion 26 </ b> A of the washer 26 and the cover plate 4, so that a waterproof structure is formed between the inner surface of the disk portion 26 </ b> A of the washer 26 and the surface of the cover plate 4.

  In the vehicle power supply device of the present invention, the non-water-permeable cushion material 27 can be made of a soft synthetic resin foam.

  In the power supply device for a vehicle according to the present invention, a recess 24 is provided on the upper surface of the cover plate 4, a fixing hole 25 for a set screw 23 is provided in the recess 24, and a screw head 23 A of the set screw 23 is provided in the recess 24. Thus, the cover plate 4 can be fixed to the case main body 1 </ b> A with the set screw 23.

  In the power supply device for a vehicle of the present invention, the cover plate 4 and the washer 26 can be made of metal.

  The power supply device for a vehicle according to the present invention is configured such that the inner surface of the center hole 27A of the cushion member 27 is screwed into the screw of the set screw 23 in a state in which the set screw 23 is screwed to a position where the peripheral edge of the washer 26 contacts the surface of the cover plate 4. The portion 23B can be water-tightly adhered.

  The power supply device for a vehicle of the present invention has a feature that the cover plate can be firmly connected to the case body by tightening the set screw with sufficient torque, and in this state, the connecting portion of the set screw can be reliably waterproofed. The power supply device of the present invention can fasten the set screw with sufficient torque to fix the cover plate to the case body by directly pressing the peripheral wall provided on the washer against the cover plate, and the inner surface of the washer disk portion and the cover plate This is because the surface can be waterproofed with a cushioning material. That is, the power supply device of the present invention is not waterproofed by tightening a set screw and sandwiching a cushion material between the washer and the cover plate as in a conventional waterproof structure. In the tightened state of the set screw, the washer directly contacts the lower end edge of the peripheral wall with the surface of the cover plate. In the structure in which the washer and the cover plate are metal plates, the metal plate of the washer and the metal plate of the cover plate are in direct contact. Since the metal plate washer and the cover plate are in direct contact, the set screw can be tightened with sufficient torque. This waterproof structure is realized by a cushion material pressed against the inner surface of the washer disk and the surface of the cover plate, not between the lower edge of the peripheral wall of the washer and the cover plate. Since the cushion material thicker than the height of the peripheral wall is tightened until the lower end edge of the peripheral wall comes into contact with the cover plate, the cushion material is thinly compressed in the tightened state. The compressed cushion material is elastically pressed while being in surface contact with the inner surface of the disk portion of the washer and the surface of the cover plate, and waterproofs between the washer and the cover plate.

  Embodiments of the present invention will be described below with reference to the drawings. However, the embodiments described below exemplify a power supply device for embodying the technical idea of the present invention, and the present invention does not specify the power supply device as follows.

  Further, in this specification, in order to facilitate understanding of the scope of claims, numbers corresponding to the members shown in the examples are indicated in the “claims” and “means for solving problems” sections. It is added to the members. However, the members shown in the claims are not limited to the members in the embodiments.

  In the power supply apparatus of FIGS. 2 and 3, the opening of the case body 1 </ b> A that opens upward is water-tightly closed by the cover plate 4. The case body 1A has a box shape opening upward, and incorporates a battery, a blower mechanism 8 and a control circuit. The case main body 1A is provided with a rising wall 1a around it, and the upper edge of the rising wall 1a is connected to the lower surface of the cover plate 4 through a packing (not shown) with a waterproof structure.

  The power supply device shown in the above figures is a strong metal plate so that the upper surface of the case 1 can be used as a load-bearing floor of a vehicle floor. This power supply device can be mounted on the floor 31 of the loading platform 32 provided behind the rear seat as shown by the solid line in FIG. 4 or on the floor 31 between the rear seat and the front seat as shown by the chain line. The power supply device can be used as a part of the vehicle floor panel 31 by mounting the cover plate 4 on the upper surface of the case so as to be flush with the vehicle floor panel 31. In the power supply device mounted on the loading platform of the vehicle, the load is placed directly on the upper surface of the cover plate 4. For this reason, the cover plate 4 is a metal plate that can withstand a load resistance corresponding to the loading capacity of the loading platform. In this power supply device, it is not necessary to provide a load bearing floor having a strength comparable to the floor panel 31 on the cover plate 4. In this power supply device, the recess 24 and the opening are provided in the floor panel 31, and the power supply device is mounted in the recess 24 and the opening so that the upper surface thereof can be a load bearing floor comparable to the floor panel 31.

  As shown in FIG. 4, the power supply device that uses the cover plate 4 for a part of the vehicle floor panel 31 penetrates into the vehicle when water is spilled in the vehicle, or when the door is opened, or enters with the rain gear. Rainwater to be supplied to the upper surface. When this water enters the inside of the case 1, the above-described various problems are generated. Particularly, in a power supply device that uses the cover plate 4 as a part of the floor panel 31, it is important that the set screw 23 of the cover plate 4 does not protrude from the cover plate 4. This is because if the screw head 23A of the set screw 23 protrudes from the cover plate 4, the upper surface of the cover plate 4 cannot be made flat.

  The cover plate 4 is provided with a recess 24 so that the screw head 23 </ b> A does not protrude from the cover plate 4. A fixing hole 25 is provided in the recess 24, and a set screw 23 is inserted into the fixing hole 25, and a screw head 23 </ b> A is disposed in the recess 24. In this structure, the depth of the concave portion 24 is set to be equal to or higher than the height of the screw head 23 </ b> A so that the screw head 23 </ b> A does not protrude from the cover plate 4. However, in the cover plate 4 having this structure, the invading water easily flows into the recess 24 and accumulates. For this reason, the water in the recess 24 does not pass through the cover plate 4, that is, the cover plate 4 is fixed to the case body 1 </ b> A with a waterproof structure.

  A structure for fixing the cover plate 4 with a waterproof structure is shown in a sectional view of FIG. 5 and an enlarged sectional view of FIG. In these drawings, the set screw 23 passes through the washer 26 and the cover plate 4 stacked on the upper surface of the cover plate 4 and is fixed to the case main body 1A by screwing.

  The washer 26 is manufactured by pressing a metal plate. The washer 26 has a shape having a peripheral wall 26B protruding toward the surface of the cover plate 4 along the outer periphery of the disk portion 26A. The peripheral wall 26B has the same overall height and is provided with a through hole 26C in the center of the disk portion 26A. The washer 26 is pressed against the cover plate 4 by the set screw 23 to bring the lower end edge of the entire circumference of the peripheral wall into close contact with the upper surface of the cover plate 4. Further, the washer 26 having this shape reinforces the disk portion 26A with the peripheral wall 26B. The disk portion 26A reinforced with the peripheral wall 26B is pressed by the screw head 23A of the set screw 23 inserted through the through hole 26C, and the lower end edge of the peripheral wall is brought into close contact with the cover plate 4. The lower end edge of the peripheral wall is in close contact with the surface of the cover plate 4, but it is not necessary to have close contact with a waterproof structure so that water does not pass through this gap. In order to make the washer 26 and the cover plate 4 waterproof, a non-water-permeable cushion material 27 between the washer 26 and the cover plate 4 is provided.

  The cushion material 27 is elastically sandwiched between the inner surface of the disk portion 26 </ b> A of the washer 26 and the surface of the cover plate 4 in a state where the set screw 23 is fastened. The elastically sandwiched cushion material 27 has its own resilience, and is elastically pressed against and closely adhered to the inner surface of the disk portion 26A of the washer 26 and the surface of the cover plate 4, and the washer 26 and the cover plate. A waterproof structure is provided between the four. Since the washer 26 and the cover plate 4 are waterproofed with this structure, the cushion material 27 does not necessarily need to be waterproofed between the lower end edge of the peripheral wall of the washer 26 and the surface of the cover plate 4.

  The non-water-permeable cushion material 27 is a soft synthetic resin foam. The cushion material 27 made of a synthetic resin foam can be made to have excellent water-impermeability by using a foam material that is foamed into closed cells. However, a synthetic resin foam having a non-foamed layer on the surface or a synthetic resin foam having closed cells and open cells can also be used. Furthermore, the cushion material of the open cell synthetic resin foam can be thinly crushed with a washer so that water cannot permeate. As the cushion material 27 of the synthetic resin foam, a polyethylene foam or a soft polyurethane foam is used. The polyethylene foam foams into a state having closed cells, is not attacked by water, and does not absorb or permeate water. Since the soft urethane foam can be made flexible by increasing the expansion ratio, it is crushed thinly by the washer 26 while the set screw 23 is tightened. For this reason, the cushioning material 27 made of polyurethane foam can be waterproofed by screwing the set screw 23 smoothly.

  As shown in FIG. 7, the thickness (d) of the cushion material 27 and the thickness (d) in the non-compressed state that is not compressed accurately are larger than the height (h) of the peripheral wall 26B. The height (h) of the peripheral wall 26B is the length from the inner surface of the disk portion 26A to the lower end edge of the peripheral wall. In a state in which the washer 26 is tightened, more specifically, in a state in which the lower end edge of the peripheral wall of the washer 26 is in close contact with the surface of the cover plate 4, the cushion material 27 is elastically attached to the inner surface of the washer 26 and the surface of the cover plate 4. This is to realize a waterproof structure. The thickness (d) of the cushion material 27 in an uncompressed state is 3 to 10 times, preferably 3 to 6 times the height (h) of the peripheral wall 26B. The magnification (d / h) of the thickness (d) of the cushion material 27 in the non-compressed state with respect to the height (h) of the peripheral wall 26B is set to an optimum value due to the flexibility of the cushion material 27. For example, the cushion material 27 of the synthetic resin foam having a high expansion ratio increases the magnification (d / h) of the thickness (d) in the uncompressed state with respect to the height (h) of the peripheral wall 26B. This is because the cushion material 27 having a high expansion ratio is compressed more thinly. The cushion material 27 does not necessarily need to use a synthetic resin foam. As the cushion material that is not a synthetic resin foam is also made of a material that is more flexible and easily deformed, the ratio of the thickness (d) of the non-compressed state to the height (h) of the peripheral wall 26B is increased, thereby providing a completely waterproof structure. .

  The cushion material 27 is disposed inside the peripheral wall 26B of the washer 26 and waterproofs between the inner surface of the disk portion 26A of the washer 26 and the surface of the cover plate 4. Therefore, the outer shape of the washer 26 is preferably that of the washer 26. It is made substantially equal to the inner shape of the peripheral wall 26B. However, the outer shape of the cushion material can be made larger than the inner shape of the peripheral wall of the washer. The cushion material 27 whose outer shape is equal to or larger than the inner shape of the peripheral wall 26B is in close contact with the inner surface of the peripheral wall 26B by being elastically pressed with the set screw 23 fastened. The cushion material 27 compressed while restricting the outer shape by the peripheral wall 26B is pressed inward from the outer periphery, and the center hole 27A becomes smaller. The smaller central hole 27 </ b> A causes its inner surface to be in close contact with the surface of the screw portion 23 </ b> B of the set screw 23. The cushion material 27 fastened in this state is pressed against and closely adhered to the inner surface of the disk portion 26A, the surface of the cover plate 4, the inner surface of the peripheral wall 26B, and the surface of the screw portion 23B of the set screw 23. Waterproof under normal conditions.

  The cushion material 27 is compressed by moving the outer peripheral surface along the inner surface of the peripheral wall 26B in a state of being deformed from the uncompressed state shown in FIG. 7 to the compressed state shown in FIG. If the outer shape of the cushion material 27 is too large compared to the inner shape of the peripheral wall 26B of the washer 26, the outer peripheral surface cannot be smoothly slid on the inner surface of the peripheral wall 26B when compressed. Therefore, the outer shape of the cushion material 27 is preferably equal to the outer shape of the peripheral wall 26B. Further, the outer shape of the cushion material can be made smaller than the inner shape of the peripheral wall. This is because the outer shape becomes larger by being compressed and is in close contact with the inner surface of the peripheral wall. Furthermore, the cushion material can be made small so that the outer surface does not adhere to the inner surface of the peripheral wall in a compressed state. This cushion material does not waterproof between the outer peripheral surface and the peripheral wall, but waterproofs the inner surface of the disk portion and the surface of the cover plate, so that the washer and the cover plate can be waterproofed in a tightened state.

  The central hole 27 </ b> A of the cushion material 27 is made equal to the outer diameter of the screw portion 23 </ b> B of the set screw 23. The cushion material 27 is in close contact with the screw portion 23B of the set screw 23 in a tightened state, and waterproofs between the cushion material 27 and the screw portion 23B. However, the center hole of the cushion material can be made slightly larger than the outer diameter of the threaded portion. This is because when compressed, the center hole becomes small and is in close contact with the surface of the screw portion. In particular, the cushion material 27 whose outer shape is equal to the inner shape of the peripheral wall 26B or larger than the inner shape of the peripheral wall 26B is pushed inward by the peripheral wall 26B in the tightened state, and the center hole 27A becomes smaller. For this reason, the cushion material 27 can make the inner diameter of the center hole 27A larger than the outer diameter of the screw portion 23B, and press the inner surface of the center hole 27A against the surface of the screw portion 23B in the fastened state.

  In the waterproof structure described above, when the set screw 23 is screwed into the tightened state, the leading edge of the peripheral wall 26 </ b> B of the washer 26 is pressed against the surface of the cover plate 4. In this state, the cushion material 27 is compressed by the disk portion 26 </ b> A of the washer 26 and the cover plate 4. The compressed cushion material 27 is elastically pressed and brought into close contact with the inner surface of the disk portion 26 </ b> A of the washer 26 and the surface of the cover plate 4, and a waterproof structure is provided between the inner surface of the disk portion 26 </ b> A of the washer 26 and the cover plate 4. And

  A case 1 of the power supply device is shown in FIG. Case 1 in this figure shows a cross section cut in the longitudinal direction of the vehicle. In the case 1 in this figure, the upper opening of the case main body 1A is closed by a cover plate 4. The case main body 1 </ b> A includes a metal base plate 2 that is fixed to a vehicle chassis or floor panel, and an upper opening plastic case 3 that is fixed on the base plate 2. The case main body 1A has a holder case 5 for storing a battery fixed therein.

  The case 1 shown in the figure has a battery housing portion 6 and a blower housing portion 7 provided therein. The power supply device is mounted on the vehicle in a posture in which the battery storage unit 6 of the case 1 is positioned in front of the vehicle with respect to the blower storage unit 7. The battery storage unit 6 positioned in front of the case 1 stores a plurality of battery modules via the holder case 5. The plurality of battery modules are stored in the holder case 5, and the holder case 5 is disposed in the battery storage unit 6. The blower storage unit 7 located behind the case 1 stores a blower mechanism 8 that forcibly cools the battery module of the holder case 5. The blower mechanism 8 is connected to the holder case 5 and forcibly blows cooling air to the holder case 5 to cool the battery module.

  Further, the case 1 of the power supply device is configured such that the base plate 2, the plastic case 3, and the cover plate 4 are divided and connected at the boundary portion between the battery storage unit 6 and the blower storage unit 7. The power supply device that divides the case 1 into front and rear can crash safely when the blower storage portion 7 is pushed under the battery storage portion 6 in the event of a rear-end collision.

  The base plate 2 is shown in FIG. The base plate 2 is divided into a front base plate 2A in front of the boundary portion and a rear base plate 2B in the rear. The front base plate 2A and the rear base plate 2B are connected to each other by a cutting pin 9 that is broken by the impact of a collision. Further, the front base plate 2A is provided with an inclined surface that is inclined upward at the rear end portion, and the rear base plate 2B is provided with an inclined surface along the lower surface of the inclined surface. The front base plate 2 </ b> A and the rear base plate 2 </ b> B are connected by cutting pins 9 by stacking inclined surfaces. When the base plate 2 having this structure is bumped and the cutting pin 9 is cut, the rear base plate 2B is pushed forward while sliding on the inclined surface. When the rear base plate 2B moves forward, the inclined surface slides and slides under the front base plate 2A to push up the rear end of the front base plate 2A. For this reason, the front base plate 2A tilts in the vertical direction, and the rear base plate 2B slides under the front base plate 2A and crashes safely.

  The plastic case 3 is shown in FIG. The plastic case 3 is divided into a front plastic case 3A in front of the boundary portion and a rear plastic case 3B in the rear. The plastic case 3 separated into the front plastic case 3A and the rear plastic case 3B is separated forward and backward by the impact of the collision. The separated plastic case 3B moves forward together with the rear base plate 2B, and the front plastic case 3A tilts together with the front base plate 2A. However, the plastic case fixed on the base plate does not necessarily need to be separated into a front plastic case and a rear plastic case and molded with plastic. This is because when the base plate 2 and the cover plate 4 are separated from each other in a crash, they are broken and separated.

  The cover plate 4 is shown in FIGS. The cover plate 4 is divided into a front cover plate 4 </ b> A that is in front of the boundary portion and covers the upper surface of the battery storage unit 6, and a rear cover plate 4 </ b> B that is in the rear and covers the upper surface of the blower storage unit 7. The front cover plate 4A and the rear cover plate 4B are made of a metal plate having an excellent load resistance. The cover plate 4 is preferably made of an aluminum alloy. The aluminum alloy cover plate 4 can be light and strong. In particular, an aluminum alloy that can be quenched is suitable. The cover plate 4 is formed by press-molding an aluminum plate and then quenched to further improve the strength.

  The front cover plate 4A is a single metal plate, and the rear cover plate 4B is a laminated metal plate in which a plurality of metal plates are laminated and fixed. The rear cover plate 4B has a higher bending strength than the front cover plate 4A as a laminated metal plate. The rear cover plate 4B having a high bending strength can be made an excellent load bearing floor with less support from the lower surface. For this reason, the support part provided in the air blower accommodating part 7 covered with the back cover plate 4B can be decreased.

  The rear cover plate 4B is a laminated metal plate in which two aluminum alloy plates are laminated and fixed. The rear cover plate can be manufactured by laminating and fixing three or more metal plates. The rear cover plate 4B made of a laminated metal plate is manufactured by adhering the laminated metal plates over the entire surface or a part thereof and further spot welding locally. A laminated metal plate that is partially bonded with an adhesive has an adhesion area of 50% or more of the total lamination area in order to obtain sufficient strength. This laminated metal plate is coated with an adhesive such as an epoxy that can firmly bond the metal plate to the entire surface or a part of the metal plate, and the electrodes are welded from both sides with the adhesive remaining uncured. It is fixed by spot welding in a state where the metal plates are brought into contact with each other. In this structure, since the adhesive can be cured in a state of being fixed by spot welding, it is not necessary to wait for the adhesive to be cured, and the stacked metal plates can be efficiently fixed. The rear cover plate 4B made of the laminated metal plate having this structure can have a very strong structure. In particular, a laminated metal plate manufactured by stacking two aluminum alloys is light and can withstand a large load. In addition, the laminated metal plate with this structure does not press-mold thick metal plates, but forms and laminates each metal plate separately, so it can be easily and easily press-formed into an ideal shape efficiently. There is a feature that can be fixed. Furthermore, the laminated metal plate having this structure has a three-layer structure in which an adhesive is sandwiched between the metal plates. When an adhesive that is hardened in a cured state, such as an epoxy adhesive, is used, a structure in which a strong adhesive layer is sandwiched between metal plates on both sides is obtained. The adhesive layer has a smaller specific gravity and lighter than the metal plate. For this reason, the sandwich structure is a structure in which both sides of a light and hard layer are sandwiched between metal plates. The laminated metal plate having this structure can be lightened while increasing the bending strength by making the whole thick. This is because both sides having a large influence on the bending strength are made of tough metal plates, and the intermediate layer for thickening is made of a light adhesive layer.

  However, the laminated metal plate of the rear cover plate can be manufactured by adhering laminated metal plates, spot welding, or fixing by screwing, or combining them.

  FIG. 13 shows a structure in which the cover plate 4 is supported from the lower surface to form a load-bearing floor. In the power supply device of this figure, a support boss 10 that supports the lower surface of the cover plate 4 is disposed between the plastic case 3 and the cover plate 4. The support boss 10 is a separate component from the plastic case 3 and has a lower end connected to the plastic case 3 and an upper end disposed on the lower surface of the cover plate 4 to support the cover plate 4 from the lower surface. The support boss 10 is disposed in a vertical posture between the plastic case 3 and the cover plate 4. The support boss 10 is connected in a vertical posture by fitting the lower end into a vertical hole provided in the plastic case 3, or is provided with a male screw at the lower end and screwed into a female screw provided in the plastic case 3 so as to be vertical. Fixed. The support boss 10 is provided with a flange at the lower end portion, and a fitting portion protrudes from the flange or a male screw protrudes so that the flange contacts the pedestal provided on the plastic case 3. Can be increased. The support boss 10 abuts on the lower surface of the cover plate 4 to increase the load resistance of the cover plate 4, or the upper end is screwed to the cover plate 4 with a waterproof structure to increase the load resistance of the cover plate 4. The support boss 10 whose upper end is screwed to the cover plate 4 also connects the cover plate 4 and the plastic case 3 by screwing the plastic case 3 at the lower end.

  Further, the power supply device of FIG. 13 is provided with the support 11 integrally molded on the plastic case 3 in order to support the cover plate 4 from the lower surface. The support | pillar 11 is shape | molded by the height which contact | abuts the upper end to the lower surface of the cover plate 4, and supports the cover plate 4 from a lower surface.

  The support | pillar 11 and the support boss | hub 10 are arrange | positioned at the air blower accommodating part 7, and support the back cover plate 4B from a lower surface. Further, in the power supply device of FIG. 13, a component storage portion 13 is provided on the side of the battery storage portion 6, and the support boss 10 is also provided in the component storage portion 13. In this figure, a support boss 10 is disposed in the component storage portion 13 on the left side of the battery storage portion 6. The support boss 10 has a lower end connected to the plastic case 3, and the column 11 has a lower end integrally formed and connected to the plastic case 3. The load of the cover plate 4 is supported by the support boss 10 and the support column 11, and the load of the support boss 10 and the support column 11 is supported by the base plate 2 through the plastic case 3. That is, the load of the cover plate 4 is supported by the base plate 2 via the support boss 10, the support 11, and the plastic case 3. The load-bearing portion of the plastic case 3 connecting the support boss 10 of the plastic case 3 and the lower end of the column 11 so that the base plate 2 can support the cover plate 4 via the support boss 10 and the column 11 is on the lower surface thereof. A base plate 2 is disposed. The lower surface of the plastic case 3 is brought into contact with the base plate 2, and the base plate 2 supports the cover plate 4 with sufficient strength via the plastic case 3, the support 11, and the support boss 10.

  Further, the power supply device shown in FIGS. 3, 8, and 13 stores a holder case 5 that stores a battery module between the plastic case 3 and the cover plate 4. The holder case 5 is provided with a holder boss 12 that supports the lower surface of the cover plate 4. The holder case 5 accommodates a large number of battery modules arranged horizontally, and is accommodated in the plastic case 3. The power supply device of FIG. 8 stores the battery modules 21 side by side in two stages, but the battery modules 21 can be stored in one stage or in three or more stages. The holder case 5 shown in the figure is fixed to the base plate 2 via a set screw 14 passing therethrough.

  The holder case 5 is provided with a holder boss 12 that supports the cover plate 4 from the lower surface, protruding upward and integrally formed. A connecting recess 16 is provided below the holder boss 12 to receive the connecting protrusion 15 of the plastic case 3. The holder case 5 is disposed at a fixed position of the plastic case 3 with the connecting convex portion 15 inserted in the connecting concave portion 16. The upper surface of the connecting protrusion 15 and the lower surface of the connecting recess 16 are in contact with each other with the connecting protrusion 15 inserted in the connecting recess 16, and the plastic case 3 supports the load acting on the holder case 5. In this structure, the load acting on the cover plate 4 is received by the holder boss 12, the load of the holder boss 12 is supported by the plastic case 3, and the load of the plastic case 3 is supported by the base plate 2. The load capacity for supporting 4 can be increased. In particular, the load of the holder case 5 can be firmly received by the plastic case 3.

  The holder case 5 is made of plastic to have a hollow shape, and the battery module 21 is accommodated in the hollow portion. That is, the battery module 21 is housed in the hollow portion inside to increase the load resistance in the vertical direction.

  The state in which the holder case 5 houses the battery module 21 is shown in FIGS. In the illustrated power supply apparatus, the holder cases 5 are stacked in two upper and lower stages, and the battery modules 21 are accommodated in two stages. The lower holder case 5 is inverted upside down from the upper holder case 5. Although not shown, the holder case 5 at each stage has a plurality of battery modules arranged horizontally in a parallel posture. However, although not shown, the power supply device of the present invention can accommodate the battery module in one stage with the holder case as one stage.

  The holder case 5 is divided into a main case 5B and a lid case 5A so that the battery module 21 can be set in a fixed position and easily assembled. The holder case 5 connects the main case 5B and the lid case 5A with the contact surfaces of each other, and has an independent chamber 17 in which the battery module 21 is housed. The holder case 5 holds the battery module 21 between the main case 5B and the lid case 5A and holds it in place. The lid case 5A and the main case 5B are entirely made of plastic.

  The holder case 5 laminated in two upper and lower stages has a structure in which the upper holder case 5 is arranged with a lid case 5A on the main case 5B, the lower holder case 5 is arranged under the main case 5B, and the lid case 5A is arranged under the main case 5B. As the arranged structure, two main cases 5B are connected in the middle between the upper and lower sides. The upper and lower main cases 5B are connected by a peripheral wall 18, and a ventilation duct 19 for blowing cooling air to each battery module 21 is provided between the main cases 5B connected to each other. The ventilation duct 19 has a ventilation opening (not shown) opened at one end thereof, and the ventilation fan 8A of the blowing mechanism 8 is connected to the ventilation opening. The blower fan 8 </ b> A forcibly sends cooling air to the ventilation duct 19 to cool the battery module 21. The holder case 5 opens the vent holes 20 in the main case 5B and the lid case 5A in order to forcibly blow the cooling air blown by the blower fan 8A to each battery module 21. The vent 20 allows cooling air to be blown forcibly through and blows the battery module 21 to cool it. Although not shown, the vents are located above and below each battery module and are opened in a slit shape extending in the axial direction of the battery module. The holder case 5 having this shape has a feature that cooling air can be quickly flowed along the surface of the battery module 21 and can be efficiently cooled.

  The battery module 21 is disposed in the independent chamber 17 formed inside the holder case 5. In order to arrange the battery module 21 at a fixed position in the independent chamber 17, as shown in FIG. 15, the battery module 21 covers the connecting portion of the battery with an elastomer cylinder 22 so as to be thicker than the outer diameter of the battery. Yes. The elastomer cylinder 22 is sandwiched between the inner surface of the independent chamber 17 and provides a gap through which air can pass between the inner surface of the independent chamber 17 and the battery surface. In this structure, a constant gap is provided between the inner surface of the independent chamber 17 and the surface of the battery module 21 so that the cooling air can flow smoothly.

  The battery module 21 is connected in a straight line by connecting a plurality of secondary batteries in series. The battery module 21 includes 4 to 8, for example, 5 or 6 secondary batteries connected in series and connected in a straight line. However, the battery module 21 can also be comprised with one secondary battery. The battery module 21 is formed by connecting cylindrical or square secondary batteries in a straight line by directly connecting battery end faces in series via a metal plate connection body or without a connection body. At both ends of the battery module 21, an electrode terminal composed of a positive terminal and a negative terminal is connected. The electrode terminal screws a metal bar bus bar (not shown) to connect adjacent battery modules 21 in series or in parallel.

  The secondary battery of the battery module 21 is a nickel-hydrogen battery. However, as the secondary battery of the battery module, a nickel-cadmium battery, a lithium ion secondary battery, or the like can be used.

It is sectional drawing which shows the waterproof structure of the conventional washer and cover plate. It is a perspective view of the power supply device for vehicles concerning one example of the present invention. It is a disassembled perspective view of the power supply device shown in FIG. It is the schematic which shows the state which mounts the power supply device shown in FIG. 2 in a vehicle. It is sectional drawing which shows the structure which fixes a cover plate with a waterproof structure. It is an expanded sectional view of the waterproof structure shown in FIG. It is a set screw shown in Drawing 6, Comprising: It is an expanded sectional view showing the uncompressed state of a cushion material. FIG. 3 is a lateral end view of the power supply device shown in FIG. 2. It is a perspective view of a base plate. It is a perspective view of a plastic case. It is a perspective view of a cover plate. It is a perspective view of a rear cover plate. It is a disassembled perspective view of the power supply device shown in FIG. FIG. 3 is a vertical end view of the power supply device shown in FIG. 2. It is an expanded sectional view of the holder case of the power supply device shown in FIG.

Explanation of symbols

1 ... Case 1A ... Case body
1a ... Rising wall 2 ... Base plate 2A ... Front base plate
2B ... Rear base plate 3 ... Plastic case 3A ... Front plastic case
3B: Rear plastic case 4 ... Cover plate 4A: Front cover plate
4B ... Rear cover plate 5 ... Holder case 5A ... Lid case
5B ... Main case 6 ... Battery storage unit 7 ... Blower storage unit 8 ... Blower mechanism 8A ... Blower fan 9 ... Cut pin 10 ... Support boss 11 ... Staff 12 ... Holder boss 13 ... Part storage unit 14 ... Set screw 15 ... Connecting convex Part 16: Connection recess 17 ... Independent chamber 18 ... Peripheral wall 19 ... Ventilation duct 20 ... Vent 21 ... Battery module 22 ... Elastomer cylinder 23 ... Set screw 23A ... Screw head
23B ... Screw part 24 ... Recess 25 ... Fixing hole 26 ... Washer 26A ... Disk part
26B ... Surrounding wall
26C ... Through-hole 27 ... Cushion material 27A ... Center hole 30 ... Floor 31 ... Floor panel 32 ... Loading platform 40 ... Waterproof washer 41 ... Holding groove 42 ... Bending piece 43 ... Packing 44 ... Set screw 45 ... Cover plate

Claims (5)

The case (1) housing the battery has an upper opening case body (1A), a cover plate (4) closing the opening of the case body (1A), and a cover plate (4) Set screw (23) to fix the case to the case body (1A), a washer (26) disposed between the set screw (23) and the cover plate (4), and a washer (26) and cover plate. (4) provided with a non-water-permeable cushion material (27),
The cover plate (4) has a fixing hole (25) that passes through a set screw (23) that is fixed to the case body (1A).
The set screw (23) passes through the washer (26), cushion material (27), and cover plate (4), screw the screw part (23B) into the case body (1A), and attach the cover plate (4) to the case. It is fixed to the main body (1A)
The washer (26) has a peripheral wall (26B) protruding toward the surface of the cover plate (4) along the outer periphery of the disk portion (26A),
The cushion material (27) has a thickness (d) in an uncompressed state thicker than a height (h) of the peripheral wall (26B), and is deformed from an uncompressed state to a compressed state. 26B) is disposed in the peripheral wall of the washer (26) so as to be moved along the inner surface of the washer and compressed.
Pass through the washer (26), cushioning material (27) and cover plate (4) until the set screw (23) is tightened to the case body (1A), and the washer (26) is attached to the peripheral wall (26B). The front edge is pressed against the surface of the cover plate (4), and the cushion material (27) is compressed by the disk part (26A) of the washer (26) and the cover plate (4), and the disk part (26A) of the washer (26) ) And a cover plate (4) between the inner surface of the vehicle and a power supply device for a vehicle having a waterproof structure.   The power supply device for a vehicle according to claim 1, wherein the non-water-permeable cushion material (27) is a soft synthetic resin foam.   The cover plate (4) has a recess (24) on the upper surface, the fixing hole (25) of the set screw (23) is provided in the recess (24), and the screw head (23A) of the set screw (23) is recessed. The power supply device for a vehicle according to claim 1, wherein the power supply device for the vehicle according to claim 1, wherein the set screw (23) fixes the cover plate (4) to the case body (1A).   The power supply device for a vehicle according to claim 1, wherein the cover plate (4) and the washer (26) are made of metal. With the set screw (23) screwed to the position where the edge of the peripheral wall of the washer (26) contacts the surface of the cover plate (4), the inner surface of the center hole (27A) of the cushion material (27) The power supply device for a vehicle according to claim 1, wherein the power supply device is in close contact with the screw portion (23B) of 23) in a watertight manner.

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