KR20120132382A - Power supply apparatus for electric power and vehicle equipped with power supply appratus - Google Patents

Abstract

PURPOSE: A power supply apparatus is provided to obtain high safety while reducing assembly cost. CONSTITUTION: A power supply apparatus comprises: a battery block formed by insulating a plurality of prismatic batteries by an insulating layer(2) and arranging in a layered state; cooling plate(4) arranged on the bottom of the battery block in thermally combined with respective prismatic batteries, and compulsory cooling the prismatic batteries from the bottom; and a cooling mechanism cooling the cooling plate. The insulating layer is formed with the external can in one body, and has a shape to be laminated on the predetermined position by an insert-fitting structure. The battery block is formed by laminating a plurality of prismatic batteries on the battery units each of which consists of the insulating layer and the prismatic battery in one body. [Reference numerals] (2) Insulating layer; (3) Battery block; (4) Cooling plate; (6) Cooling mechanism; (7) End plate; (8) Connecting unit

Description

POWER SUPPLY APPARATUS FOR ELECTRIC POWER AND VEHICLE EQUIPPED WITH POWER SUPPLY APPRATUS

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a power supply device for power supply, which is mainly used for power supply of a motor for driving a car such as a hybrid car, a fuel cell car, an electric car, or accumulates electric power of a solar cell, and a vehicle provided with the power supply device. will be.

A large output is required for a power supply device that is driven by a power supply device or a solar cell that drives a motor that drives a vehicle and supplies power at night, or when the daytime power demand is large. This power supply device connects a plurality of batteries in series to increase the output voltage. As a power supply device used for this kind of use, the thing of the structure which laminated | stacks several square batteries, and connects adjacent square batteries in series and raises an output voltage is developed (refer patent document 1).

Japanese Patent Publication No. 2010-153141

The power supply device of Patent Literature 1 arranges an insulating separator between a plurality of rectangular batteries, and insulates and stacks adjacent rectangular batteries by the insulating separator. In a structure in which a plurality of rectangular batteries are laminated to form a battery block, a potential difference occurs between the outer rectangular cans of adjacent rectangular batteries. Therefore, it is necessary to insulate and stack adjacent square batteries. In order to insulate adjacent square cells, an insulating separator molded from an insulating material such as plastic is disposed between the square cells. That is, the battery block alternately laminates a square battery and an insulating separator to form a battery block. In the battery block of this structure, it is necessary to arrange a square battery and an insulating separator in a fixed position, and to fix a square battery in a laminated state. When the relative position of an insulating separator and a square battery shifts, and the outer can of the adjacent square battery contacts, a large short-circuit current flows and cannot use it safely, and there exists a damage which causes remarkable damage to the battery itself. For this reason, it is necessary to arrange the insulated separator accurately between the square cells so that there is no misalignment. Therefore, a battery block in which a large number of square batteries are stacked is troublesome to assemble, and the number of parts increases, resulting in an increase in assembly cost. Moreover, when it is used for a long time and the relative position of an insulating separator and a square battery shifts by vibration etc., the wastewater which a large short electric current flows in a square battery will generate | occur | produce.

This invention was developed in order to solve the above fault. An important object of the present invention is to provide a power supply device and a vehicle having a power supply device capable of securing high safety while reducing assembly costs.

The power supply device for electric power of the present invention is formed by insulating a plurality of square batteries 1 provided with an exterior can 11 having electrical conductivity by insulating the insulating layers 2, 42, 52, and 62 in a stacked state. The battery block 3 and the cooling plate 4 which are arrange | positioned at each bottom battery 1 at the bottom face of this battery block 3 in thermal coupling state, and forcibly cools each square battery 1 from the bottom face. And a cooling mechanism 5 for cooling the cooling plate 4. The insulating layers 2, 42, 52, and 62 have a shape laminated in place by a fitting structure fitted to each other, and are integrally formed with the outer can 11. The battery block 3 is configured by stacking a plurality of battery units 10 in which the insulating layers 2, 42, 52, 62 and the square battery 1 are integrally formed.

The above power supply device is characterized by ensuring high safety while reducing assembly costs. It forms the insulating layer which has a fitting structure integrally with an exterior can, and forms a square battery and an insulating layer as a battery unit of an integrated structure, and it ensures that adjacent square batteries are reliably, even if it is a structure which is not equipped with the conventional insulation separator. This is because the insulation can be prevented and the shift of the relative position of the square battery can be prevented.

The power supply device for electric power of this invention can make the insulating layer 2, 42, 52, 62 the shape which covers the main surface 1B of the exterior can 11 at least.

In this specification, the main surface of an exterior can means the surface used as the opposing surface of the square batteries laminated | stacked on each other.

In the above power supply device, since the main surface of the outer can is covered by the insulating layer, the stacked rectangular batteries can be insulated reliably. In addition, even when condensation occurs in the square battery, since the main surface of the square battery is covered by the insulating layer, it is possible to suppress the transfer of condensation water to the output terminal provided on the upper surface of the square battery.

The power supply device for electric power of this invention insert-forms the square battery 1 to the insulating layers 2, 42, 52, and 62, and forms the square battery 1 and the insulating layers 2, 42, 52, 62. It can be set as the battery unit 10 of an integral structure.

The above power supply device can simply and easily form an insulating layer on the surface of a square battery, and can reliably insulate adjacent square batteries.

In the power supply device for electric power of the present invention, a plurality of battery units 10 formed by stacking of battery blocks 3 from each other are squeezed in a stacking direction by a pair of end plates 7 from both sides. By connecting the pair of end plates 7 with the connecting member 8, the plurality of battery units 10 can be fixed in a stacked state by the pair of end plates 7.

The power supply device for electric power described above can reliably fix the battery unit to the cooling plate in a thermally coupled state by mounting the battery unit on the cooling plate and connecting both ends of the battery block with the end plate and the connecting member.

The power supply device for electric power of this invention can be laminated | stacked in the fixed position by fitting the battery unit 10 and the end plate 7 together.

The above power supply device can reliably fix the battery unit and the end plate in a state without shifting the position.

The power supply device for electric power of this invention can shape the insulation layer 2, 42, 52, 62 of the battery unit 10 thicker than an outer peripheral part.

In the power supply device described above, in the laminated state of the battery units, the center portion of the insulating layer can be brought into contact with the surface contact state, and the outer peripheral portion of the square battery can be prevented from being strongly pressed. For this reason, it is possible to prevent the damage such as deformation of the outer peripheral portion of the square battery.

The power supply device for electric power of this invention can arrange | position the heat conductive sheet 6 compressed and deformed between the battery block 3 and the cooling plate 4.

The above power supply device can reliably and stably connect each rectangular battery to a cooling plate via a heat conductive sheet in a thermally coupled state. For this reason, each square battery can be cooled so that temperature difference may become small certainly.

In the power supply device for electric power of the present invention, the insulating layers 2, 42, 52, and 62 of the battery unit 10 expose an opening can 11 to the bottom surface of the battery unit 10, which is a surface facing the cooling plate 4. A heat conduction sheet 6 made of an insulating material in the opening 22, and connect the outer can 11 to the cooling plate 4 in a thermally coupled state via the heat conduction sheet 6; Can be.

The above power supply device is arranged so that the thermally conductive sheet is not misaligned at the correct position of the insulating layer, whereby the bottom face of the outer can of the rectangular battery can be reliably connected to the cooling plate in a thermally coupled state. For this reason, as a cooling plate, each rectangular battery can be cooled so that temperature difference may become small stably.

In the power supply device for electric power of the present invention, the insulating layers 2, 42, 52, and 62 of the battery unit 10 cover the cover portions 23 that cover both ends of the bottom surface 1A of the outer can 11. The opening part 22 is formed between this cover part 23, and the boundary surface 24 located in the boundary of this cover part 23 and the opening part 22 is 1A of bottom surfaces of the square battery 1. As shown in FIG. It can be set as the inclined surface which inclines so that opening area may be enlarged toward the contact surface of the cooling plate 4 from the side.

In the above power supply device, the thermally conductive sheet disposed in the opening of the insulating layer is squeezed by the bottom surface of the prismatic battery and the cooling plate so that the thermally conductive sheet is enlarged and opened while being in close contact with the cooling plate in a wider area in a thermally bonded state to cool. As a plate, each rectangular battery can be cooled so that a temperature difference may become small efficiently.

The power supply apparatus for electric power of this invention can be set as the apparatus which supplies electric power to the motor which drives a vehicle.

The above power supply device has a structure in which a large output is supplied to the motor by increasing the output, and it is possible to reliably fix a large number of square batteries in place as battery units. In particular, while preventing the positional shift of a square battery or an insulating layer by the vibration of a vehicle, it has the characteristic that a large number of square batteries can be fixed to a fixed position over a long period of time, and can be used stably.

The power supply device for electric power of this invention is charged with the electric power of a solar cell, and can be set as the apparatus which accumulates the generated electric power of a solar cell.

The power supply device described above can be used to secure a large number of prismatic cells in place as battery units while increasing the output to make it possible to charge the large output of the solar cell. In addition, there is a feature that a plurality of square batteries can be fixed and used in a stable position over a long period of time.

The vehicle of the present invention can include any one of the above power supply devices.

1 is a perspective view of a power supply unit for power according to an embodiment of the present invention.
FIG. 2 is an exploded perspective view of the power supply device shown in FIG. 1. FIG.
FIG. 3 is an exploded perspective view of the power supply device shown in FIG. 1 seen from the bottom side. FIG.
4 is a horizontal sectional view of the power supply device shown in FIG. 1;
FIG. 5 is a vertical longitudinal cross-sectional view of the power supply device shown in FIG. 1. FIG.
FIG. 6 is an enlarged vertical cross-sectional view of part of the power supply device shown in FIG. 1. FIG.
FIG. 7 is an enlarged cross-sectional view of a main part of the power supply device shown in FIG. 4. FIG.
8 is an enlarged cross-sectional view of a main part of the power supply device shown in FIG. 5;
9 is an enlarged perspective view of the battery unit.
10 is an exploded cross-sectional view illustrating a fitting structure in which a plurality of battery units are stacked.
11 is an exploded cross-sectional view illustrating another example of a fitting structure in which a plurality of battery units are stacked.
12 is an exploded cross-sectional view showing another example of a fitting structure in which a plurality of battery units are stacked.
13 is an exploded perspective view illustrating another example of a fitting structure in which a plurality of battery units are stacked;
Fig. 14 is a block diagram showing an example of mounting a power supply device according to an embodiment of the present invention to a hybrid car that is driven by an engine and a motor.
Fig. 15 is a block diagram showing an example of mounting a power supply device according to an embodiment of the present invention to an electric vehicle that runs only with a motor.
Fig. 16 is a block diagram showing an example of applying a power supply device according to an embodiment of the present invention to a power storage device.

EMBODIMENT OF THE INVENTION Hereinafter, the Example of this invention is described based on drawing. However, the Example described below illustrates the vehicle provided with the power supply device and power supply device for power for embodying the technical idea of this invention, and this invention does not specify a power supply device and a vehicle to the following. . In addition, this specification adds the number corresponding to the member described in the Example to the member described in the "claim" and "the column of a means for solving a problem", so that a claim may be easily understood. have. However, the member described in a claim is not specified to the member of an Example at all.

The power supply device for electric power of the present invention is mainly mounted in an electric vehicle such as a hybrid vehicle or an electric vehicle, and is used in a power supply apparatus for supplying electric power to a traveling motor of a vehicle to drive a vehicle, or for powering a solar cell. It is used for power supply that accumulates and outputs at peak power at night or daytime.

In the power supply device shown in FIGS. 1 to 8, the battery block 3 insulating the plurality of square batteries 1 including the conductive outer can 11 with the insulating layer 2 and arranged in a laminated state. And a cooling plate 4 for cooling the exterior can 11 of the square battery 1 constituting the battery block 3 from the bottom surface 1A, and a cooling mechanism 5 for cooling the cooling plate 4. ). The cooling mechanism 5 of the above power supply device circulates a refrigerant through the cooling plate 4 to cool the cooling plate 4, and connects the cooling plate 4 to the outer can 11 in a thermally coupled state. The square battery 1 is forcibly cooled. The cooling mechanism 5 detects the temperature of the square battery 1 and controls the temperature of the cooling plate 4. When the temperature of the rectangular battery 1 becomes higher than the set temperature, the cooling mechanism 5 circulates the refrigerant through the cooling plate 4 to cool the rectangular battery 1 through the cooling plate 4. When the temperature of the square battery 1 is lower than the set temperature, the cooling mechanism 5 stops the circulation of the refrigerant to the cooling plate 4.

The square battery 1 is a lithium ion secondary battery. However, the rectangular battery is not specific to the lithium ion secondary battery, and any rechargeable battery, for example, a nickel hydride battery, can also be used. The square battery 1 accommodates the electrode body (not shown) which has laminated | stacked the electrode plate in the exterior can 11, filled with electrolyte solution, and airtightly sealed. As shown in FIG. 6, the exterior can 11 is shape | molded in the shape of the square cylinder which closes the bottom, and hermetically closes the upper opening part with the sealing plate 12. As shown in FIG. The exterior can 11 is a deep drawing process of metal plates, such as aluminum and an aluminum alloy, and has an electroconductive surface. The stacked square batteries 1 are molded into thin squares. The sealing plate 12 is also made of a metal plate such as aluminum or an aluminum alloy. This sealing plate 12 fixes the electrode terminal 13 of the government part to both ends via the insulating material 14. The electrode terminal 13 of the government part is connected to an electrode plate (not shown) of the government part embedded therein. The lithium ion secondary battery does not connect the exterior can 11 to an electrode. However, since the outer can 11 is connected to the electrode plate via the electrolyte solution, the outer can 11 becomes an intermediate potential of the electrode plate. However, the square battery can also connect one electrode terminal to the exterior can with a lead wire. This rectangular battery can be fixed to a sealing plate without insulating the electrode terminals connected to the exterior can. Moreover, the sealing plate 12 forms the opening part 16 of the safety valve 15. The safety valve 15 opens the valve when the internal pressure of the outer can 11 becomes higher than the set value, thereby preventing the outer can 11 from being damaged. When the safety valve 15 opens, the gas inside is discharged from the opening 16 of the sealing plate 12 to the outside. In the square battery 1 of FIG. 6 and FIG. 9, the opening part 16 of the safety valve 15 is formed in the sealing plate 12. As shown in FIG. This square battery 1 can discharge gas from the opening part 16 of the safety valve 15 which opens a valve. This is because gas is stored in the exterior can 11. The square battery may form an opening of a safety valve at the bottom or side of the outer can. However, this rectangular battery discharges electrolyte when the safety valve is opened. The electrolyte is a conductive liquid, and if this is discharged, the contact portion may be shortened. The square battery 1 in which the safety valve 15 is provided in the sealing plate 12 can discharge gas from the safety valve 15 opened, and can reduce internal pressure. For this reason, when the safety valve 15 is open | released, discharge | emission of electrolyte solution can be restrict | limited and the damage by electrolyte solution can be reduced.

Although not illustrated, the stacked rectangular batteries 1 are connected to adjacent electrode terminals 13 and connected in series or in parallel with each other. In the square batteries 1 connected in parallel, no potential difference occurs in the outer can 11. However, the power supply device which enlarges an output does not connect all the square cells 1 in parallel, but connects them in series and raises an output voltage. In the square batteries 1 connected in series, a potential difference is generated between the exterior cells 11 of the adjacent square batteries 1. Therefore, the power supply device sandwiches the insulating layer 2 between the exterior cans 11 of the adjacent square batteries 1, and stacks adjacent square batteries 1 in an insulated state. In addition, the insulating layer 2 sandwiched between the respective rectangular batteries 1 thermally blocks and stacks adjacent rectangular batteries 1 so that the temperature of either rectangular battery 1 becomes very high and thermally runaway. Even if it is in a state, it also has an effect of preventing thermal runaway from causing thermal runaway of the adjacent square battery 1. Therefore, the battery block which arrange | positions the insulating layer also between the square cells connected in parallel can prevent the thermal runaway, and can improve safety.

Although not shown, a lead wire (not shown) is connected to the electrode terminal 13 of each rectangular battery 1. This lead wire is connected to a circuit board (not shown) in which a protection circuit for detecting the voltage of the square battery 1 is mounted. Although not illustrated, the circuit board is disposed above the power supply device in FIG. 1.

The battery block 3 arrange | positions the insulating layer 2 between the square cells 1 which adjoin each other. The insulating layer 2 is a shape which covers almost the whole of the main surface 1B of the exterior can 11 which becomes the opposing surface of the square battery 1 adjacent to each other at least. The insulating layer 2 insulates the outer can 11 of the adjacent square battery 1 and thermally cuts off the adjacent square battery 1. Therefore, the insulating layer 2 is produced by shape | molding plastic. However, the insulating layer may be produced by molding an insulating material such as rubber instead of plastic.

The insulating layer 2 insert-forms the square battery 1, and uses the insulating layer 2 and the square battery 1 as the battery unit 10 of an integral structure. The battery unit 10 is produced by temporarily fixing a square battery 1 to a molding chamber of a mold for molding the insulating layer 2 and injecting plastic into the molding chamber. As shown in FIGS. 6 to 9, the insulating layer 2 covers the entire outer circumferential surface of the square battery 1 and both ends of the bottom surface 1A, and the entire upper surface and the bottom surface of the square battery 1 are formed. It is shape | molded in the shape which exposes the area | region except both ends of 1A).

In addition, although not shown, the insulating layer may be formed of a molded body in which a rubber-like elastic body such as soft plastic or rubber is molded into a shape that conforms to the outline of the square battery, and the molded body may be mounted on the surface of the square battery. This insulating layer is, for example, in a state in which the inner mold of the molded body molded from a rubber-like elastic body is expanded, a rectangular battery is inserted inside, and is mounted in a state in which it is elastically in close contact with the surface of the exterior can to cover the rectangular battery. . Thereby, an insulating layer and an exterior can can be formed integrally, and an insulating layer and a square battery can be set as the battery unit of an integral structure. This insulating layer can also be made into the shape which covers the whole outer peripheral surface of a square battery, and both ends of a bottom face, and exposes the whole upper surface of a square battery and the area | region except the both ends of a bottom face.

The insulating layer 2 of FIG. 6 and FIG. 9 exposes the upper surface in which the electrode terminal 13 of the square battery 1 is provided. The square battery 1 forms the electrode terminal 13 and the opening part 16 of the safety valve 15 in the sealing plate 12 of the upper surface. The battery unit 10 exposing the surface of the sealing plate 12 can simplify the connection of the electrode terminal 13. In addition, since the opening 16 of the safety valve 15 is not closed, a discharge duct (not shown) or the like can be connected to the opening 16 of the safety valve 15.

The insulating layer 2 forms the thick part 21 by shape | molding the area | region which covers the center part of the laminated surface 17 of the battery unit 10 thicker than the outer peripheral part of the laminated surface 17. As shown in FIG. The battery unit 10 is laminated in a state in which the lamination surfaces 17 are brought into close contact with each other, and the thick portion 21 formed at the center of the lamination surface 17 of the insulating layer 2 contacts in a surface contact state. The outer peripheral part of the opposing surface of the square battery 1 can be prevented from being strongly pressed.

In addition, the battery unit 10 which has the insulating layer 2 and the square battery 1 as an integral structure has the shape which fits the insulating layer 2, and is laminated | stacked in position. The fitting structure of the insulating layer 2 consists of the fitting convex part 25 and the recessed concave part 26 which formed the battery unit 10 laminated adjacent to each other and opposing the laminated surface 17 which opposes. Doing. This fitting structure guides the fitting convex part 25 which protruded from the laminated surface 17 to the opposing fitting concave part 26, and connects it in the fitting state. However, the fitting structure may form a fitting hole instead of the fitting recess which guides the fitting convex part.

The insulating layer 2 of the battery unit 10 shown in FIG. 2 and FIG. 3 forms a convex portion 25 to be fitted to one laminated surface 17, and is fitted to the other laminated surface 17. The fitting recessed part 26 which guides the attachment convex part 25 is formed. That is, in FIG. 2 and FIG. 3, the insulating layer 2 of the battery unit 10 stacked adjacent to each other forms a convex portion 25 to be fitted to one side of the laminated surfaces 17 facing each other. On the other side, the fitting concave part 26 which guides this fitting convex part 25 is formed. The insulating layer 2 of the figure forms a plurality of fitting convex portions 25 on one of the laminated surfaces 17, and these sandwiched surfaces on the laminated surface 17 facing the laminated surface 17. A plurality of immersion recesses 26 for guiding the attachment convex portions 25 are formed, and the positions and postures of the battery units 10 stacked on each other can be specified. The insulating layer 2 in the figure is located on the four corner portions of the thick portion 21 as the laminated surfaces 17 facing each other, and forms the convex portion 25 and the concave concave portion 26 to be fitted.

The insulating layer 2 shown in the figure makes the external shape of the fitting convex part 25 circular, and fits the internal shape of the fitting concave part 26 which guides this circular fitting convex part 25. The circular shape which follows the external shape of the part 25 is made. The inner shape of the recessed recessed part 26 is made substantially equal to the external shape of the fitting convex part 25, or is made slightly larger, and connects the fitting convex part 25 to the fitting recessed part 26 in the fitting state. To make it possible. Thus, the fitting structure which guides and positions the circular fitting convex part 25 to the fitting concave part 26, has a some fitting convex part 25 and a fitting concave part in the laminated surface 17 ( By forming 26, the position and posture of the battery unit 10 can be specified and stacked in the correct position. However, the fitting convex part and the fitting concave part do not necessarily need to be circular, but can also be made into a polygonal shape. That is, the external shape of a fitting convex part may be made into a polygonal shape, and the internal shape of a fitting convex part may be made into a polygonal shape along the external shape of this fitting convex part. Thus, the fitting structure which guides and positions a polygonal fitting convex part to a recessed concave part forms one or several fitting convex part and a recessed concave part in a laminated surface, and it positions and postures of a battery unit. It can be laminated to specific position. In addition, the fitting structure of an insulating layer can make a fitting convex part a long protrusion, and can also make the recessed recessed part which guides the fitting convex part of this long protrusion into a groove shape. This fitting structure can also be laminated at the correct position while specifying the position and posture of the battery unit.

In the above fitting structure, as shown in FIG. 10, the fitting convex part 25 formed in one side of the laminated surface 17 which mutually adjacent battery units 10 mutually oppose is formed in the other side. It guides to the recessed part 26, and laminated | stacked, positioning the some battery unit 10 in a fixed position. In addition, the battery units 10 stacked on each other, as shown in FIG. 10, in order to connect the battery cells 1 adjacent to each other in series, an output terminal 13 of the government terminal of the adjacent battery cells 1. ), The battery cells 1 are stacked in an attitude of inverting left and right alternately. Therefore, in the battery unit 10 positioned up and down in FIG. 10 and the battery unit 10 positioned in the middle, the insulating layer 2 is disposed with respect to the arrangement of the output terminals 13 of the top of the battery cells 1. The arrangement of the convex part 25 and the fitting concave part 26 formed in () is reversely rotated.

In addition, the fitting structure of an insulating layer can also be set as the structure shown in FIG. The fitting structure shown in FIG. 11 is located on both sides of one laminated surface 17, forms the fitting convex part 25 and the fitting recessed part 26, and is laminated | stacked on this laminated surface 17. FIG. At the opposing positions on both sides of the other laminated surface 17 to be formed, the fitting concave portion 26 and the fitting convex portion 25 are formed, and the fitting convex portions 25 facing each other are inserted into the concave concave portion 26. ) To guide and fit. The battery unit 10 shown in FIG. 11 is a point-symmetrical arrangement of the convex portions 25 and the recessed concave portions 26 formed on the laminated surface 17 on which the insulating layers 42 face each other in plan view. It arrange | positions so that it may become so. Since this structure connects adjacent battery cells 1 in series, even if the adjacent battery cells 1 are inverted left and right alternately and arranged so that the output terminal 13 of the government part may be reversed, the laminated surface 17 The fitting convex part 25 and the fitting concave part 26 arrange | positioned at the opposing position of () can be made into the same arrangement. Therefore, battery units having the same structure can be manufactured and stacked in a posture in which a plurality of battery cells 1 can be connected in series, that is, left and right alternately alternately.

In addition, the fitting structure of an insulating layer is not specified to the above structure which consists of a convex part and a concave recessed part to fit, For example, as shown in FIG. 12, the guide piece 27 is provided in both sides of the insulating layer 52. As shown in FIG. It can also be set as the shape which guides the battery unit 10 adjacent to the inside of this guide piece 27. The insulating layer 52 shown in FIG. 12 is located on both sides of the battery unit 10, and integrally formed and provided with the guide piece 27 protruding in the stacking direction of the battery unit 10. The insulating layer 52 of the figure projects the guide pieces 27 on both sides in one direction, guides the battery unit 10 adjacent between the guide pieces 27 on both sides, and stacks the battery units 10. The position shift of the left-right direction of each other is prevented. Moreover, the insulating layer 52 shown in the figure guides the guide recessed part 28 which guides the guide piece 27, in order to connect the guide piece 27 of the adjacent battery unit 10 to a fixed position. It is formed to face the piece 27. The left and right guide pieces 27 are guided to the guide recesses 28 to prevent positional shifts in the vertical direction between the battery units 10 to be stacked. In FIG. 12, in order to connect the battery units 1 adjacent to each other in series, the output terminals 13 of the output terminals 13 of the adjacent battery cells 1 are reversed in the reverse direction. The battery cells 1 are stacked in such a manner as to alternate left and right alternately. Therefore, in the battery unit 10 positioned up and down in FIG. 12, and the battery unit 10 positioned in the middle, the insulating layer 52 is disposed with respect to the arrangement of the output terminal 13 of the top of the battery cell 1. ), The arrangement of the guide pieces 27 and the guide concave portions 28 to be mounted at the center) is reversed.

In addition, the guide piece provided in an insulating layer can also be set as the structure shown in FIG. In each of the side surfaces of the battery unit 10, the insulating layer 62 illustrated in FIG. 13 is provided with guide pieces 27 protruding in opposite directions from each other up and down, and on both sides of the battery unit 10. The guide pieces 27 to be installed at each other are arranged so as to have a point symmetry attitude in plan view. As a result, the battery units 10 stacked on top of each other are prevented from shifting up and down by contacting the guide pieces 27 facing each other while being positioned up and down, and protruding in the same direction on both sides of the battery unit 10. Positioning is carried out in the state which is clamped by the guide piece 27, and the position shift of the left-right direction is prevented. Moreover, even if this structure arrange | positions so that the output terminal 13 of the opposite direction may be reversed by inverting adjacent battery cells 1 left and right alternately, in order to connect the battery cells 1 adjacent to each other in series. The guide pieces 27 arrange | positioned at the opposing position of the both sides of the unit 10 can be made into the same arrangement. Therefore, a battery unit having the same structure can be manufactured and stacked in a posture in which a plurality of battery cells 1 can be connected in series, that is, left and right alternately alternately.

In addition, the power supply device of the present invention does not specify the fitting structure of the insulating layer to the above structure. The fitting structure of the insulating layer can be made into any other shape in which the battery units stacked adjacent to each other can be fitted so that there is no misalignment.

As shown in FIG. 3 and FIG. 6, the insulating layer 2 is provided with an opening 22 exposing the outer can 11 on the bottom face of the cooling plate 4. The insulating heat conductive sheet 6 is arrange | positioned at this opening part 22, and the outer can 11 is connected to the cooling plate 4 in the thermal bonding state via the heat conductive sheet 6. As shown in FIG. The insulating layer 2 of FIG. 3 and FIG. 6 has the cover part 23 which covers the both ends of 1 A of bottom surfaces of the exterior can 11, and forms the opening part 22 between these cover parts 23. FIG. Doing. The thickness of the cover part 23 is equivalent to the thickness of the heat conductive sheet 6, and both the cover part 23 and the heat conductive sheet 6 are brought into close contact with the surface of the cooling plate 4. In this structure, the cover portion 23 is made thin to make the heat conductive sheet 6 thin, and the cover portion 23 is made thick to make the heat conductive sheet 6 thick. By thinning the heat conductive sheet 6, the square battery 1 can be cooled by the cooling plate 4 more effectively. However, if the thermally conductive sheet is too thin, it becomes difficult to realize sufficient strength, so the thickness of the thermally conductive sheet is preferably about 0.5 mm to 1.5 mm.

In addition, as shown in the enlarged sectional view of a part of FIG. 6, the cover part 23 cools the boundary surface 24 located in the boundary with the opening part 22 from the bottom surface 1A of the square battery 1. It is set as the inclined surface inclined so that opening area may be large toward the contact surface with the plate 4. In this structure, the heat conductive sheet 6 disposed in the opening 22 of the insulating layer 2 can be squeezed by the bottom surface 1A and the cooling plate 4 of the square battery 1, pressurized and deformed. The thermally conductive sheet 6 can be brought into close contact with the surface of the cooling plate 4 while being enlarged and opened. For this reason, the heat conductive sheet 6 can be reliably stuck to the cooling plate 4 in a larger area, and it can be made into the more preferable thermal bonding state. For this reason, with the cooling plate 4, each square battery 1 can be cooled so that a temperature difference may become small efficiently.

The heat conductive sheet 6 is compressed and deformed between the rectangular battery 1 and the cooling plate 4 of the battery block 3, and is formed on both sides of the bottom surface 1A of the rectangular battery 1 and the cooling plate 4. Close contact with the surface. The thermally conductive sheet 6 is coated on the surface thereof with an insulating thermal conductive paste such as silicone oil, thereby bringing the surface of the rectangular battery 1 into the surface contact state of the bottom surface 1A and the surface of the cooling plate 4 more stably. It can also be in close contact. In addition, although not shown, the heat conducting paste may be filled in the opening exposing the bottom of the rectangular battery, and the bottom of the rectangular battery may be connected to the cooling plate in a thermally coupled state through the heat conductive paste. This structure does not necessarily use a thermally conductive sheet, and it is possible to connect the rectangular battery to the surface of the cooling plate in a thermally bonded state only by the thermally conductive paste.

The power supply device described above connects the bottom surface 1A of each rectangular battery 1 to the cooling plate 4 in a thermally coupled state through the thermal conductive sheet 6 or the thermal conductive paste in a stable manner, thereby providing each rectangular battery. (1) can be cooled efficiently so that a temperature difference may become small. However, the power supply device of the present invention may be covered with an insulating layer without exposing the bottom surface of the square battery and connected to the surface of the cooling plate in a thermally bonded state.

The plurality of battery units 10 to be stacked includes a pair of end plates 7 disposed on both end faces of the battery units 10 stacked as shown in FIGS. 1 to 6, and the end plates 7. ) Is fixed in a laminated state by the connecting member 8 connecting the ends.

The end plate 7 is molded from hard plastic or made of metal such as aluminum or an alloy thereof. In order to narrow the battery unit 10 in a large area, the end plate 7 has the same shape as that of the battery unit 10. The rectangular end plate 7 is the same size as the battery unit 10 or slightly larger than the battery unit 10. Moreover, the end plate 7 can be connected so that there may be no positional shift with the battery unit 10 by fitting the laminated surface 17 with the battery unit 10 in a fitting structure. This fitting structure can be made into the same structure as the fitting structure of the battery unit 10 mentioned above. The end plate 7 shown in FIG.2 and FIG.3 is this convex part 25 in the position which opposes the fitting convex part 25 formed in the laminated surface 17 of the battery unit 10. As shown in FIG. While forming the recessed recessed part 26 which guides the guide part, it guides to this recessed recessed part 26 in the position which opposes the immersion recessed part 26 formed in the laminated surface 17 of the battery unit 10. The fitting convex part 25 to be formed is formed. The power supply device described above is fitted with the fitting convex portion 25 and the recessed concave portion 26 formed to face the stacking surface 17 of the battery unit 10 and the end plate 7 in a state where there is no misalignment. It is fixed. In addition, although not shown, the fitting structure of a battery unit and an end plate can also be comprised by the guide piece provided in both sides. However, it is not necessary to necessarily have the same structure as the fitting structure of a battery unit, and it can be set as all the shape which can be fitted so that a battery unit and an end plate may not shift.

To the end plate 7, the end of the connecting member 8 made of the metal band 8A is connected. The metal band 8A is connected to the end plate 7 via the fixing screw 8B. The end plate 7 which connects the metal band 8A with the fixing screw 8B forms the female screw hole 7a which twists the fixing screw 8B. The female screw hole 7a is formed in the outer surface of the end plate 7, twists the fixing screw 8B which penetrates the bent part 8a formed in the both ends of the metal band 8A, and the metal band 8A. Connect it. Although the metal band 8A of the figure is being fixed to the end plate 7 with the fixing screw 8B, you may bend the end of a metal band inward and connect to an end plate, or you may caulk an end and connect to an end plate. .

1 to 3, the end plate 7 includes a metal band 8A disposed along the upper end of the battery unit 10, and a metal band 8A disposed along the lower end of the battery unit 10. Is connecting to. This power supply device is an upper end and a lower end of the end plate 7, and forms female threaded holes 7a at both sides of the outer surface. This power supply device fixes the top and bottom of the battery unit 10 with a metal band 8A. Although not shown, the power supply device can be disposed above and below the metal band in the middle of the top and bottom. The end plate 7 which fixes the edge part of the metal band 8A with the fixing screw 8B forms the female screw hole 7a in the connection position of the metal band 8A.

8A of metal bands are produced by processing the metal plate of predetermined thickness to predetermined width. The metal band 8A connects an end part to the end plate 7, connects a pair of end plates 7, and holds the plurality of battery units 10 in a compressed state therebetween. The metal band 8A fixes the pair of end plates 7 to predetermined dimensions, and fixes the rectangular battery 1 and the insulating layer 2 stacked therebetween in a predetermined compressed state. When the metal band 8A increases due to the expansion pressure of the square battery 1, the expansion of the square battery 1 can not be prevented. Therefore, the metal band 8A is manufactured by processing a metal plate of strength that does not elongate at the expansion pressure of the square battery 1, for example, a stainless plate such as SUS304 or a metal plate such as steel sheet to a width and thickness having sufficient strength. do. Moreover, a metal band can also process a metal plate in groove shape. Since the metal band of this shape can strengthen bending strength, it has the feature that the rectangular battery to be laminated can be firmly fixed to a predetermined compression state while narrowing the width.

The metal band 8A forms a bent portion 8a at the end, and connects the bent portion 8a to the end plate 7. The bent portion 8a forms a through hole of the fixing screw 8B, and is fixed to the end plate 7 via the fixing screw 8B inserted therein.

The cooling plate 4 forms the refrigerant path 31 which circulates a refrigerant | coolant inside, as shown to FIGS. 1-3 and FIG. The coolant path 31 is supplied with a coolant such as freon or carbon dioxide gas in a liquid phase, and vaporizes the coolant therein to cool the cooling plate 4 with vaporization heat. This cooling plate 4 connects the coolant path 31 to the cooling mechanism 5.

The cooling mechanism 5 liquefies by cooling the compressor 36 which pressurizes the refrigerant | coolant of the gaseous state vaporized by the refrigerant path 31, and the refrigerant | coolant compressed by this compressor 36 as shown in FIG. A cooling heat exchanger (37) to be provided, and an expansion valve (38) for supplying the refrigerant liquefied by the cooling heat exchanger (37) to the refrigerant passage (31). The liquid refrigerant supplied through the expansion valve 38 is vaporized by the refrigerant path 31 in the cooling plate 4, and cooled by the heat of vaporization to cool the cooling plate 4 and discharged to the cooling mechanism 5. Therefore, the coolant is circulated through the coolant path 31 and the cooling mechanism 5 of the cooling plate 4 to cool the cooling plate 4. The cooling mechanism 5 cools the cooling plate 4 at low temperature by the heat of vaporization of the refrigerant, but the cooling plate can be cooled regardless of the heat of vaporization. The cooling plate supplies a coolant such as brine cooled to a low temperature to the coolant, and directly cools the cooling plate by the low temperature coolant even if the coolant is not evaporated heat.

The cooling mechanism 5 controls the cooling state of the cooling plate 4 by the temperature sensor (not shown) which detects the temperature of the square battery 1. That is, when the temperature of the square battery 1 becomes higher than the preset cooling start temperature, the refrigerant is supplied to the cooling plate 4 and cooled, and when the square battery 1 is lower than the cooling stop temperature, the cooling plate ( Supply of the refrigerant to 4) is stopped, and the square battery 1 is controlled in a preset temperature range.

The above power supply device can be used as a vehicle power supply. As a vehicle on which the power supply device is mounted, an electric vehicle such as a hybrid car, a plug-in hybrid car, or an electric car running only with a motor can be used, and is used as a power source for these vehicles.

Fig. 14 shows an example in which a power supply device is mounted in a hybrid vehicle that runs with both an engine and a motor. The vehicle HV equipped with the power supply device 90 shown in this drawing includes an engine 96 for driving the vehicle HV, a motor 93 for driving, and a power supply for supplying electric power to the motor 93. The apparatus 90 and the generator 94 which charges the battery of the power supply apparatus 90 are provided. The power supply device 90 is connected to the motor 93 and the generator 94 via the DC / AC inverter 95. The vehicle HV runs on both the motor 93 and the engine 96 while charging and discharging the battery of the power supply device 90. The motor 93 is driven to drive the vehicle in an area having poor engine efficiency, for example, during acceleration or low speed travel. The motor 93 is driven by being supplied with electric power from the power supply device 90. The generator 94 is driven by the engine 96 or by regenerative braking when braking the vehicle to charge the battery of the power supply device 90.

15 shows an example in which a power supply device is mounted in an electric vehicle that runs only by a motor. The vehicle EV equipped with the power supply device 90 shown in this drawing includes a motor 93 for driving which drives the vehicle EV and a power supply device 90 for supplying electric power to the motor 93. And a generator 94 for charging the battery of this power supply device 90. The power supply device 90 is connected to the motor 93 and the generator 94 via the DC / AC inverter 95. The motor 93 is driven by being supplied with electric power from the power supply device 90. The generator 94 is driven by energy at the time of regenerative braking of the vehicle EV to charge the battery of the power supply device 90.

In addition, this invention does not identify the use of a power supply device to the power supply of the motor which drives a vehicle. The power supply device of the present invention can be used as a power source for a power storage device that charges and accumulates a battery with electric power generated by solar power generation, wind power generation, or the like, or a power storage device that charges and stores a battery by using night power at night. It can also be used as a power supply for the dragon. The power supply device charged with the late night power can be charged with the late night power, which is the surplus power of the power plant, and output power during the day when the power load increases, thereby limiting the low peak power of the day. Moreover, a power supply device can also be used as a power supply which charges with both the output of a solar cell and night power. This power supply device can effectively use both electric power generated by a solar cell and late night electric power, and can efficiently accumulate electricity while taking weather and power consumption into consideration.

The power storage device shown in FIG. 16 charges the battery of the power supply device 80 by the latent power of the commercial power supply, the charging power supply 85, such as a solar cell, discharges the battery of the power supply device 80, and loads ( Power is supplied to the DC / AC inverter 82 of 81. For this reason, the electrical storage device of the figure has a charging mode and a discharge mode. The power supply 85 for charging is connected to the power supply device 80 via the charge switch 86, and the DC / AC inverter 82 is connected to the power supply device 80 via the discharge switch 84. It is. ON / OFF of the discharge switch 84 and the charge switch 86 is switched by the control circuit 87 of the power supply device 80. In the charging mode, the control circuit 87 turns the charging switch 86 ON and the discharging switch 84 OFF to charge the battery of the power supply 80 with the power supplied from the charging power source 85. do. When the power supply device 80 is fully charged and fully charged, or when a capacity of a predetermined value or more is charged, the control circuit 87 switches the charge switch 86 to OFF to stop charging. In the discharge mode, the control circuit 87 turns the discharge switch 84 ON and the charge switch 86 OFF to supply electric power from the power supply device 80 to the load 81. The load 81 supplied with power from the power supply device 80 supplies electric power from the power supply device 80 to the electric device 83 through the DC / AC inverter 82. When the remaining capacity of the battery drops to a predetermined capacity, the power supply device 80 switches the discharge switch 84 to OFF to stop the discharge. In addition, the electrical storage device can turn on both the charge switch 86 and the discharge switch 84 as necessary, and can simultaneously supply power to the load 81 and charge the power supply device 80.

The above power storage devices include backup power supplies that can be mounted in racks of computer servers, backup power supplies for wireless base stations such as mobile phones, power supplies for home or factory storage, power supplies for street lamps, traffic signals for traffic signals and roads. It can use suitably for uses, such as a power supply.

1: square battery
1A: bottom
1B: Jumyeon
2, 42, 52, 62: insulation layer
3: battery block
4: cooling plate
5: cooling appliance
6: heat conduction sheet
7: end plate
7a: female thread hole
8: connection member
8A: metal band
8a: bend
8B: set screw
10: battery unit
11: exterior cans
12: sealing plate
13: electrode terminal
14: insulation material
15: safety valve
16, 22: opening
17: laminated surface
21: thick meat
23: cover part
24: boundary
25: fitting convex part
26: indentation recess
27: Guide
28: guide recess
31: circuit
36: compressor
37: cooling heat exchanger
38: expansion valve
80, 90: power supply
81: load
82, 95: DC / AC inverter
83: electrical appliances
84: discharge switch
85: rechargeable power source
86: charge switch
87: control circuit
93: motor
94: generator
96: engine
EV, HV: Vehicle

Claims (12)

The battery block 3 which insulates the several square battery 1 provided with the exterior can 11 which has electroconductivity with the insulating layers 2, 42, 52, and 62, and arrange | positions in a laminated state, and this battery block On the bottom face of (3), it is arrange | positioned to each square battery 1 in the thermal bonding state, The cooling plate 4 which forcibly cools each square battery 1 from a bottom surface, and this cooling plate 4 are cooled It is a power supply device for electric power provided with the cooling mechanism 5 to
The insulating layers 2, 42, 52, and 62 are formed to be integrally formed with the exterior can 11 while being stacked in place by a fitting structure that fits each other.
The battery block 3 is configured by stacking a plurality of battery units 10 in which the insulating layers 2, 42, 52, 62 and the square battery 1 are integrally formed. Dragon power supply. The power supply device for electric power according to claim 1, wherein the insulating layer (2, 42, 52, 62) has a shape covering at least a main surface (1B) of the outer can (11). The square battery (1) according to claim 1 or 2, wherein the square battery (1) is insert molded into the insulating layers (2, 42, 52, 62), and the square battery (1) and the insulating layers (2, 42, 52, 62). ) Is a battery unit (10) of an integral structure, the power supply unit for power. The plurality of battery units 10 formed by stacking the battery blocks 3 from each other are squeezed in the stacking direction by a pair of end plates 7 from both sides. And the pair of end plates 7 are connected by the connecting member 8, and the plurality of battery units 10 are fixed in the stacked state by the pair of end plates 7. Power unit. The power supply device for electric power according to claim 4, wherein the battery unit (10) and the end plate (7) have a fitting structure. The power supply device for electric power according to any one of claims 1 to 5, wherein the insulating layer (2, 42, 52, 62) of the battery unit (10) is formed by forming a central portion thicker than an outer peripheral portion. The power supply device for electric power according to any one of claims 1 to 6, wherein a heat conductive sheet (6) compressed and deformed is disposed between the battery block (3) and the cooling plate (4). The opening part 22 of Claim 7 which exposes the exterior can 11 in the bottom surface which the insulating layers 2, 42, 52, 62 of the said battery unit 10 oppose the cooling plate 4, The heat conduction sheet 6 which consists of an insulating material is arrange | positioned at this opening part 22, and the outer can 11 is connected to the cooling plate 4 by the thermal coupling state via the heat conduction sheet 6, and is electric power Dragon power supply. The insulating layer (2, 42, 52, 62) of the said battery unit 10 has the cover part 23 which covers both ends of the bottom surface 1A of the outer can 11, The opening part 22 is formed between the cover parts 23, and the boundary surface 24 located in the boundary of this cover part 23 and the opening part 22 is cooled from the bottom face 1A of the square battery 1. A power supply device for electric power, which is an inclined surface that is inclined to increase an opening area toward a contact surface of the plate (4). The power supply device for electric power according to any one of claims 1 to 9, wherein the power supply device is a device that supplies electric power to a motor that drives the vehicle. The power supply device for electric power according to any one of claims 1 to 9, wherein the power supply device is a device that charges with electric power of a solar cell and accumulates electric power generated by the solar cell. A vehicle comprising the power supply device according to any one of claims 1 to 10.

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