JP2013125617A - Power supply device and vehicle having the same, and power storage device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a temperature difference generated in each battery cell to allow the battery cell to be used with stability.SOLUTION: A power supply device has: a secondary battery cell 1 whose outer shape is square; and a cooling plate 61 arranged so as to be opposed to one surface 1X of the secondary battery cell 1, and cooling the secondary battery cell 1 from the one surface 1X of the secondary battery cell 1. Further, the power supply device is provided with a cooling auxiliary member 8 on the other surface 1Y, adjacent to the one surface 1X, of the secondary battery cell 1. The cooling auxiliary member 8 is configured to be in a thermal coupling state with the secondary battery cell 1 and the cooling plate 61.

Description

  The present invention mainly includes a power supply device for a large current used for a power source of a motor driving a vehicle such as a hybrid vehicle or an electric vehicle, or a power storage application for home use or factory use, and such a power supply device. The present invention relates to a vehicle and a power storage device.

  There is a demand for a power supply device with high output, such as an assembled battery for vehicles. In such a power supply device, a large number of battery cells are connected in series to increase the output voltage and increase the output power. In such a power supply device using a large number of battery cells, the battery cells generate heat due to charge / discharge. In particular, if a large amount of charge / discharge current flows due to sudden braking or sudden start, the amount of heat generated also increases. For this reason, the cooling mechanism for cooling each battery cell efficiently is calculated | required.

  Conventionally, an air-cooling type in which a gap is provided between the battery cells and cooling air is blown to this portion is employed. On the other hand, a method has been proposed in which a cooling plate is provided on the bottom surface of the battery cell, and a battery block that is a stack of battery cells placed thereon is cooled from the bottom surface (see, for example, Patent Document 1). . With this method, there is no need to provide a gap between the battery cells, so that the battery block can be made compact. Further, by using a coolant for the cooling plate, it can be expected that the cooling effect is further enhanced as compared with the air cooling method.

JP 2010-192207 A

  In such a cooling method using a cooling plate, when attention is paid to each battery cell 201 as shown in FIG. 21, the battery cell 201 is placed on the cooling plate 261 and the bottom surface 201X of the battery cell 201 and the cooling plate 261 are brought into contact with each other. It is cooled by performing heat exchange on this surface. Here, since each battery cell 201 is thin, the contact area on the bottom surface 201X is small compared to the side surface and the like, and as a result, the cooling proceeds from the bottom surface 201X side upward, so that the bottom surface 201X side efficiently cools. On the other hand, the cooling capacity is relatively inferior on the top surface 201Z side, and there is a problem that heat distribution occurs in the height direction of each battery cell 201.

  FIG. 22 shows the result of measuring the temperature in the height direction of the battery cell 201 in the example as shown in FIG. In this graph, the horizontal axis represents the distance from the top surface 201Z of the battery cell 201, and the vertical axis represents the in-cell temperature. As shown in this figure, a temperature difference of 10 ° C. or more occurs between the bottom surface 201X and the top surface 201Z of the battery cell 201. Such a temperature difference increases as the battery cell becomes thinner and the heat generation of the battery cell increases. A large temperature difference inside each battery cell is not preferable because it affects the performance and life of the battery cell.

  The present invention has been made to solve such problems. A main object of the present invention is to provide a power supply device that can stably use a battery cell by reducing a temperature difference generated inside each battery cell, a vehicle including the power supply device, and a power storage device.

Means for Solving the Problems and Effects of the Invention

In order to achieve the above object, according to the power supply device of the first aspect of the present invention, the secondary battery cell 1 having a rectangular outer shape and the one surface 1X of the secondary battery cell 1 are opposed to each other. And a cooling plate 61 for cooling the secondary battery cell 1 from one surface 1X of the secondary battery cell 1. Further, the power supply device is provided with a cooling auxiliary member 8 on the other surface 1Y adjacent to the one surface 1X of the secondary battery cell 1, and the cooling auxiliary member 8 includes the secondary battery cell 1 and the cooling plate 61. It is comprised so that it may be in a thermal coupling state.
As a result, not only one surface of the secondary battery cell facing the cooling plate, but also the other surface adjacent to this one surface can be thermally coupled to the cooling plate via the cooling auxiliary member, and cooling is also performed from the other surface. The temperature difference in the direction away from the cooling plate can be suppressed. In addition, by providing the cooling auxiliary member, there is an advantage that the cooling capacity can be improved by increasing the area where the secondary battery cell is cooled.

According to the power supply device according to the second aspect of the present invention, the one surface 1X of the secondary battery cell 1 can be the bottom surface 1C, and the other surface 1Y of the secondary battery cell 1 can be the main surface 1A.
By this, the cooling plate arrange | positioned at the bottom face side of a secondary battery cell can be thermally coupled to the main surface via a cooling auxiliary member and cooled, thereby suppressing a temperature difference in the height direction of the secondary battery cell. .

According to the power supply device according to the third aspect of the present invention, the cooling auxiliary member 8 includes a main body portion 8A facing the other surface 1Y of the secondary battery cell 1, and one surface 1X of the secondary battery cell 1. An intervening piece 8B interposed between the cooling plate 61 and the main body 8A and the interposing piece 8B can be joined by integral molding.
Thereby, since a cooling plate is comprised so that a secondary battery cell may be cooled via the main-body part of a cooling auxiliary member, it can cool a secondary battery cell more uniformly.

According to the power supply device of the fourth aspect of the present invention, the cooling auxiliary member 8 can have insulation.
Thereby, it is possible to prevent unintentional conduction in the secondary battery cell due to the cooling auxiliary member.

According to the power supply device of the fifth aspect of the present invention, a plurality of the secondary battery cells 1 are stacked, and the cooling auxiliary member 8 is disposed between the adjacent secondary battery cells 1. A battery block 11 can be provided.
Thereby, the cooling auxiliary member can serve as both a cooling member that cools the secondary battery cell and a separator that insulates the stacked secondary battery cell, and improves the thermal conductivity and replaces the existing member. Utilization can improve reliability while avoiding an increase in the number of parts.

According to the power supply device which concerns on the 6th side surface of this invention, it is provided with the heat conductive sheet 13 which is arrange | positioned between the said cooling auxiliary member 8 and the said secondary battery cell 1, and has heat conductivity and elasticity. it can.
Thereby, the clearance gap between a secondary battery cell and a cooling plate can be reduced, and a thermal coupling state can be improved.

According to the power supply device according to the seventh aspect of the present invention, the cooling auxiliary member 8 includes a main body portion 8A facing the other surface 1Y of the secondary battery cell 1, and one surface 1X of the secondary battery cell 1. An interposition piece 8B interposed between the cooling plate 61 and a heat conductive sheet 12 having thermal conductivity and elasticity between the interposition piece 8B and the cooling plate 61; Between the piece 8B and the bottom surface 1X of the secondary battery cell 1, a heat conductive sheet 13 having thermal conductivity and elasticity can be disposed.
Thereby, between a cooling plate and an interposition piece, and between an interposition piece and a secondary battery cell bottom, a heat conductive sheet can be arrange | positioned, respectively, a contact state can be improved, and heat transfer performance can be improved.

Further, according to the power supply device according to the eighth aspect of the present invention, the cooling auxiliary member 8 can be directly joined to the cooling plate 61.
Thereby, a cooling auxiliary member can be joined directly to a cooling plate without providing an interposition piece, and cooling performance can be improved.

  Furthermore, according to the power supply device which concerns on the 9th side surface of this invention, the said cooling plate 61 can exhibit heat dissipation by flowing a refrigerant | coolant inside.

  Furthermore, a vehicle according to a tenth aspect of the present invention is equipped with the power supply device.

  Furthermore, a power storage device according to an eleventh aspect of the present invention is equipped with the power supply device.

It is a disassembled perspective view of the power supply device which concerns on Example 1 of this invention. It is a perspective view which shows the battery block of the power supply device of FIG. FIG. 3 is a vertical cross-sectional view of the battery block of FIG. 2. FIG. 3 is a partially enlarged vertical vertical sectional view of the battery block of FIG. 2. It is a disassembled perspective view which shows the state which removed the cooling plate from the battery block of FIG. It is the perspective view which looked at the battery block of FIG. 5 from diagonally downward. It is a disassembled perspective view of the battery block of FIG. It is a disassembled perspective view of the battery laminated body of the battery block of FIG. It is a partially expanded vertical longitudinal cross-sectional view which shows another example of a cooling auxiliary member. It is a partially expanded vertical longitudinal cross-sectional view which shows another example of a cooling auxiliary member. It is a perspective view which shows another example of a cooling auxiliary member. It is a perspective view which shows another example of a cooling auxiliary member. It is a perspective view which shows another example of a cooling auxiliary member. It is a schematic plan view which shows the arrangement | positioning state of the cooling plate and cooling mechanism of the power supply device shown in FIG. It is a disassembled perspective view of the battery block of the power supply device which concerns on Example 2 of this invention. FIG. 16 is a partially enlarged vertical vertical sectional view of the battery block of FIG. 15. It is a disassembled perspective view of the battery laminated body of the battery block of FIG. It is a block diagram which shows the example which mounts a power supply device in the hybrid vehicle which drive | works with an engine and a motor. It is a block diagram which shows the example which mounts a power supply device in the electric vehicle which drive | works only with a motor. It is a block diagram which shows the example applied to the power supply device for electrical storage. It is a partially expanded vertical longitudinal sectional view of a conventional power supply device. It is a graph which shows the temperature in a cell in the height direction of the battery cell of the conventional power supply device.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the embodiment described below exemplifies a power supply apparatus for embodying the technical idea of the present invention, a vehicle including the power supply apparatus, and a method for manufacturing the power supply apparatus. The vehicle and power supply device manufacturing method provided are not specified as follows. Moreover, the member shown by the claim is not what specifies the member of embodiment. In particular, the dimensions, materials, shapes, relative arrangements, and the like of the constituent members described in the embodiments are not intended to limit the scope of the present invention only to the description unless otherwise specified. It is just an example. Note that the size, positional relationship, and the like of the members shown in each drawing may be exaggerated for clarity of explanation. Furthermore, in the following description, the same name and symbol indicate the same or the same members, and detailed description thereof will be omitted as appropriate. Furthermore, each element constituting the present invention may be configured such that a plurality of elements are constituted by the same member and the plurality of elements are shared by one member, and conversely, the function of one member is constituted by a plurality of members. It can also be realized by sharing. In addition, the contents described in some examples and embodiments may be used in other examples and embodiments.
Example 1

1 to 8 illustrate an example in which the power supply device 100 according to the first embodiment of the present invention is applied to an in-vehicle power supply device. 1 is an exploded perspective view of the power supply apparatus 100, FIG. 2 is a perspective view showing the battery block 11 of FIG. 1, FIG. 3 is a vertical cross-sectional view of the battery block 11 of FIG. 2, and FIG. 5 is a partially enlarged vertical vertical sectional view of the battery block 11, FIG. 5 is an exploded perspective view of the battery block 11 of FIG. 2 with the cooling plate 61 removed, and FIG. 6 is a perspective view of the battery block 11 of FIG. 7 is an exploded perspective view of the battery block 11 of FIG. 2, and FIG. 8 is an exploded perspective view of the battery stack 5 of the battery block 11 of FIG. This power supply device 100 is mounted mainly on an electric vehicle such as a hybrid vehicle or an electric vehicle, and is used as a power source for supplying electric power to a traveling motor of the vehicle to cause the vehicle to travel. However, the power supply device of the present invention can be used for electric vehicles other than hybrid vehicles and electric vehicles, and can also be used for applications requiring high output other than electric vehicles.
(Power supply device 100)

As shown in the exploded perspective view of FIG. 1, the external appearance of the power supply device 100 is a box shape whose upper surface is rectangular. In this power supply device 100, a box-shaped outer case 70 is divided into two, and the assembled battery 10 is accommodated therein. The exterior case 70 includes a lower case 71, an upper case 72, and end plates 73 connected to both ends of the lower case 71 and the upper case 72. The upper case 72 and the lower case 71 have a flange portion 74 protruding outward, and the flange portion 74 is fixed with a bolt (not shown) and a nut (not shown). The outer case 70 has a flange 74 disposed on the side surface of the outer case 70. In the example shown in FIG. 1, as the assembled battery 10, two battery blocks 11 are housed in the lower case 71 in total, two in the longitudinal direction and two in the lateral direction. Each battery block 11 is fixed at a fixed position inside the outer case 70. The end surface plate 73 is connected to both ends of the lower case 71 and the upper case 72 and closes both ends of the exterior case 70.
(Battery 10)

  The assembled battery 10 includes four battery blocks 11 in the example shown in FIG. That is, two battery blocks 11 are connected in the stacking direction of the secondary battery cells 1 to form one battery block continuous body 11A, and two battery block continuous bodies 11A in such a connected state are arranged in parallel, The assembled battery 10 is configured.

FIG. 2 shows a perspective view of each battery block 11 constituting the assembled battery 10. The battery block 11 is fixed on a cooling plate 61 for cooling the battery block 11. As shown in FIGS. 3 to 7, the battery block 11 includes a connection structure for fixing on the cooling plate 61 (details will be described later).
(Battery block 11)

  As shown in FIGS. 7 and 8, each battery block 11 is disposed so as to face a plurality of secondary battery cells 1 stacked on each other and one surface 1X of the secondary battery cell 1. The cooling plate 61 that cools the secondary battery cell 1 from the one surface 1X of the cell 1 and the other surface 1Y adjacent to the one surface 1X of the secondary battery cell 1 are arranged to face the secondary battery cell 1 and the cooling plate. 61 and a cooling auxiliary member 8 disposed in a thermally coupled state. The battery block 11 shown in the drawing has a plurality of secondary battery cells 1 stacked on each other, and a cooling auxiliary member 8 is interposed on the surface where the secondary battery cells 1 are stacked to each other so that the other surface 1Y of the secondary battery cell 1 is. The lower end is thermally coupled to the cooling plate 61. Furthermore, the battery block 11 shown in the figure includes a pair of end plates 3 disposed on both end surfaces in the stacking direction of a battery stack 5 in which a plurality of secondary battery cells 1 and cooling auxiliary members 8 are stacked alternately, and a battery. In order to insulate the surfaces of the plurality of secondary battery cells 1 constituting the battery stack 5 from the metal fastening members 4 that fasten the end plates 3 disposed on both end faces of the stack 5. An insulating cover 16 is provided to cover the upper surface and both side surfaces.

The battery block 11 shown in the figure is disposed in a thermally coupled state with the bottom surface 1C of the secondary battery cell 1 facing the cooling plate 61 with the one surface 1X as the one surface and the main surface 1A of the secondary battery cell 1 as the other surface 1Y. A cooling auxiliary member 8 is arranged. However, the power supply device does not necessarily have to be arranged on the cooling plate 61 with the bottom surface 1C of the secondary battery cell 1 as the one surface 1X facing the cooling plate 61, and the outer surface 1B of the secondary battery cell 1 on the cooling plate 61. It can also be arranged on the cooling plate 61 as one opposing surface. In this power supply device, in the structure in which a plurality of secondary battery cells are stacked in a standing posture (see FIG. 8), although not shown, a cooling plate is disposed on the side surface of the battery stack, that is, the cooling plate is arranged. It can arrange | position with a vertical attitude | position and can cool from the side surface of a secondary battery cell. Further, the power supply device has the cooling plate arranged in a horizontal posture, and the battery stack is placed on the upper surface from the standing posture (see FIG. 8), that is, the surface on which the positive and negative electrode terminals are provided. It can arrange | position with the attitude | position made into the side surface of a block, and can also cool from the side surface of a secondary battery cell.
(Battery laminate 5)

As shown in FIG. 8, the battery stack 5 is formed by stacking a plurality of secondary battery cells 1 via a cooling auxiliary member 8. In the illustrated battery stack 5, the cooling auxiliary member 8 has insulating properties, and the cooling auxiliary member 8 is also used as an insulating separator that insulates the secondary battery cells 1 adjacent to each other. That is, as an insulating separator that insulates the secondary battery cells 1 adjacent to each other, the cooling auxiliary member 8 is interposed between the stacked surfaces of the secondary battery cells 1, and the plurality of secondary battery cells 1 and the cooling auxiliary member 8 are combined. The battery stack 5 is formed by alternately stacking. As shown in FIG. 7, the battery stack 5 has a pair of end plates 3 disposed on both end faces, and the pair of end plates 3 are connected by a fastening member 4 to form a battery block 11.
(Secondary battery cell 1)

  As shown in FIG. 8, the secondary battery cell 1 has an outer can that forms the outer shape of a rectangular shape that is thinner than the width. Here, the secondary battery cell 1 having the outer shape of the outer can as a square is a bottom surface 1C which is a bottom side surface of the bottomed outer can, and a facing surface between the secondary battery cells 1 stacked on each other. 1 A of main surfaces which spread in the width direction, and the outer surface 1B which becomes a surface which comprises the both sides | surfaces of the battery laminated body 5 and spreads in the thickness direction of the secondary battery cell 1 are provided. The secondary battery cell 1 is mainly cooled by disposing the cooling auxiliary member 8 on the main surface 1A in a thermally coupled state. However, in the battery block that is arranged opposite to the cooling plate with the bottom surface of the secondary battery cell as one surface, the cooling auxiliary member is arranged in a thermally coupled state between the main surface and the outer surface as the other surface of the secondary battery cell. You can also.

  In the secondary battery cell 1, positive and negative electrode terminals 1b are provided on a sealing plate 1a for closing the outer can, and a safety valve 1c is provided between the electrode terminals 1b. The safety valve 1c is configured to open when the internal pressure of the outer can rises to a predetermined value or more and to release the internal gas. The increase in the internal pressure of the outer can can be stopped by opening the safety valve 1c. The unit cell constituting the secondary battery cell 1 is a rechargeable secondary battery such as a lithium ion battery, a nickel-hydrogen battery, or a nickel-cadmium battery. In particular, when a lithium ion secondary battery is used for the secondary battery cell 1, there is an advantage that the charge capacity with respect to the volume and mass of the entire battery cell can be increased.

The secondary battery cells 1 that are stacked to form the battery stack 5 are connected to each other in parallel and in series by connecting adjacent positive and negative electrode terminals 1b with a bus bar 6. The battery blocks shown in FIGS. 4, 7, and 8 connect twelve secondary battery cells 1 in two rows and six straight lines. The battery block 11 that connects the adjacent secondary battery cells 1 in parallel and connects the parallel connected secondary battery cells 1 in series increases the output voltage and increases the output while increasing the output current. it can. However, the number of secondary battery cells connected to the battery block in parallel and in series can be variously changed. Moreover, all the secondary battery cells can be connected in series or in parallel. The secondary battery cell 1 is made of a metal outer can. The secondary battery cell 1 is sandwiched with an insulating cooling auxiliary member 8 as an insulating separator in order to prevent shorting of the outer cans between adjacent secondary battery cells 1. Note that the outer can of the secondary battery cell can be made of an insulating material such as plastic. In this case, since it is not necessary for the secondary battery cell to insulate and laminate the outer can, the cooling auxiliary member does not necessarily have insulating properties.
(Cooling auxiliary member 8)

  The cooling auxiliary member 8 is disposed on the main surface 1A, which is the other surface 1Y of the secondary battery cell 1, and cools the secondary battery cell 1. The cooling auxiliary member 8 is disposed in a thermally coupled state to the main surface 1 </ b> A of the secondary battery cell 1, and has a lower end thermally coupled to the cooling plate 61. The cooling auxiliary member 8 is cooled by the cooling plate 61 to cool the secondary battery cell 1. The cooling auxiliary member 8 is made of a material having heat conduction, for example, metal, heat conducting plastic, or the like so that the secondary battery cell 1 can be effectively cooled. The cooling auxiliary member 8 is processed into a plate shape or a sheet shape from a material having thermal conductivity, and is laminated on the main surface 1A of the secondary battery cell 1 in a thermally coupled state.

  The metal cooling auxiliary member 8 can be easily and easily manufactured using a metal plate, and can realize excellent heat conduction. The cooling auxiliary member 8 made of a metal plate is made of, for example, aluminum or an aluminum alloy. The cooling auxiliary member 8 made of aluminum or an aluminum alloy is light and inexpensive, is easy to process, and has an excellent thermal conductivity. However, metals other than aluminum and aluminum alloys can be used for the cooling auxiliary member. The cooling auxiliary member 8 made of a metal plate has a thickness of 0.1 mm to 5 mm, preferably 0.2 mm to 3 mm so that the secondary battery cell 1 can be efficiently cooled at low cost and light weight. More preferably, it is 0.3 mm to 2 mm.

  As shown in the partially enlarged cross-sectional view of FIG. 4, the metal cooling auxiliary member 8 is insulated by providing an insulating layer 18 on the surface in order to prevent a short circuit between the stacked secondary battery cells 1. Yes. The cooling auxiliary member 8 made of metal is used as the insulating layer 18 by covering the surface with an insulating film for insulation, or covering the surface with an insulating resin for insulation, or by applying an insulating coating on the surface for insulation. can do. As described above, the cooling auxiliary member 8 having an insulated surface can stack the secondary battery cells 1 whose outer cans are made of metal in an insulating state, and therefore, the insulating stacked between the adjacent secondary battery cells 1. Can be used as a separator. However, a secondary battery cell whose surface is insulated, for example, a secondary battery cell whose outer can is covered with an insulating film, or an insulating paint or resin is applied, or the outer can is made of plastic. In the case of using a secondary battery cell made of an insulating material such as, it is not always necessary to insulate the surface of the cooling auxiliary member. However, even in this case, the safety can be further improved by insulating the surface of the cooling auxiliary member. As described above, the battery block 11 having a configuration in which the cooling auxiliary member 8 made of a metal plate is also used as an insulating separator separately reduces the interval between adjacent secondary battery cells 1 as compared with a configuration having an insulating separator. Therefore, there is a feature that the battery stack 5 can be made compact by shortening the overall length.

  The cooling auxiliary member 8X shown in FIGS. 4 and 8 includes a main body portion 8A disposed in a thermally coupled state on the other surface 1Y of the secondary battery cell 1, and this main body portion 8A is used as the main battery portion of the secondary battery cell 1. It arrange | positions facing the surface 1A. The cooling auxiliary member 8X is provided with a main body portion 8A having a size facing substantially the entire main surface 1A of the secondary battery cell 1. The cooling auxiliary member 8X can efficiently cool the entire surface of the secondary battery cell 1. However, the cooling auxiliary member may be configured to partially cool the main surface of the secondary battery cell.

  Further, the cooling auxiliary member 8X of FIGS. 4 and 8 is provided between the bottom surface 1C of the secondary battery cell 1 and the cooling plate 61 at the lower end of the main body portion 8A disposed on the main surface 1A of the secondary battery cell 1. An intervening piece 8B is provided. The auxiliary cooling member 8X in the figure joins the main body 8A and the interposition piece 8B by integral molding. As described above, the cooling auxiliary member 8X having the interposition piece 8B at the lower end has a feature that the area of the portion thermally coupled to the cooling plate 61 can be widened to be cooled more efficiently. As shown in FIGS. 4 and 8, the cooling auxiliary member 8 </ b> X made of a metal plate is provided with an interposition piece 8 </ b> B by bending a lower end portion into an L shape. In this structure, the interposition piece 8B can be provided at the lower end of the main body 8A most simply. However, the cooling auxiliary member 8 can also have a structure shown in FIG. The cooling auxiliary member 8Y of FIG. 9 protrudes on both sides of the lower end of the main body 8A, and is provided with an inverted T-shaped interposition piece 8B. Furthermore, the cooling auxiliary member does not necessarily need to be provided with an intervening piece, and may have a structure shown in FIG. The cooling auxiliary member 8Z in FIG. 10 directly connects the lower end of the main body 8A to the cooling plate 61 without providing an interposition piece at the lower end of the main body 8A.

  Although the cooling auxiliary member 8 has the main body 8A facing the main surface 1A of the secondary battery cell 1, the cooling auxiliary member 8 is formed of the secondary battery cell 1 as shown in FIG. It can also be provided facing the outer side surface 1B. The cooling auxiliary member 8P shown in the figure is provided with a pair of cover pieces 8C facing the outer side surface 1B of the secondary battery cell 1 on both side edges of the main body 8A. The pair of cover pieces 8C can be provided by bending protruding pieces provided on both side edges of the main body 8A. As described above, the cooling auxiliary member 8P including the cover pieces 8C on both sides thermally couples the pair of cover pieces 8C to both outer side surfaces 1B of the secondary battery cell 1 so that the secondary battery cell 1 is also connected to the outer side surface 1B. Can be cooled. Furthermore, since this cooling auxiliary member 8P is configured to include a pair of cover pieces 8C protruding from both sides, the cover pieces 8C can also prevent the secondary battery cell 1 from shifting in the width direction.

Further, the cooling auxiliary members 8X, 8Y, 8Z, and 8P described above have a shape in which the main body portion 8A is opposed to almost the entire main surface 1A of the secondary battery cell 1, but the cooling auxiliary member is formed on the secondary battery cell. An uncooled portion that is not thermally coupled can be provided to suppress cooling of the secondary battery cell. An example of such a cooling auxiliary member is shown in FIGS. The cooling auxiliary member 8Q in FIG. 12 is provided with a through hole 8a as a non-cooling portion 17 at the center of the lower end portion of the main body portion 8A. The through hole 8a shown in the figure has an opening area that increases downward so as to suppress cooling of the lower end portion of the secondary battery cell 1. The cooling auxiliary member 8 </ b> R in FIG. 13 is provided as a non-cooling portion 17 with a plurality of through holes 8 b opened in the lower portion of the main body portion 8 </ b> A. The plurality of through holes 8ba are provided so as to increase in number downward, that is, arranged so that the opening area increases downward, so that cooling of the lower end portion of the secondary battery cell 1 is suppressed. ing. The cooling auxiliary members 8Q, 8R having these shapes suppress the cooling of the lower end portion of the secondary battery cell 1 that is close to the cooling plate 61 and is easily cooled, while the upper part of the secondary battery cell 1 that is far from the cooling plate 61 is provided. Since it can cool effectively, there exists the characteristic which can cool the whole secondary battery cell 1 uniformly.
(Thermal conductive sheet 13)

A heat conductive sheet 13 is interposed between the cooling auxiliary member 8 and the secondary battery cell 1. The heat conductive sheet 12 is preferably made of a material excellent in heat conduction and further has a certain degree of elasticity. Examples of such a material include acrylic, urethane, epoxy, and silicone resins. Thus, by giving elasticity to the heat conductive sheet 13, the surface of the heat conductive sheet 13 is elastically deformed to eliminate a gap at the contact surface between the cooling auxiliary member 8 and the secondary battery cell 1, and the thermal coupling state is established. It can be improved satisfactorily. In the battery block 11 shown in the figure, a heat conductive sheet 13 is disposed between the interposed piece 8 </ b> B of the cooling auxiliary member 8 and the bottom surface 1 </ b> C of the secondary battery cell 1. With this structure, the bottom surface 1C of the secondary battery cell 1 can be reliably thermally coupled to the interposed piece 8B. In the illustrated battery block 11, the heat conductive sheet 13 is not disposed between the main surface 1 </ b> A of the secondary battery cell 1 and the main body 8 </ b> A of the auxiliary cooling member 8. This is because the battery block 11 is fastened from both ends, whereby the main surface 1A of the secondary battery cell 1 and the main body 8A of the cooling auxiliary member 8 are brought into close contact with each other without any gap and can be reliably thermally coupled. However, a heat conductive sheet can also be arranged between the main surface of the secondary battery cell and the main body of the cooling auxiliary member. Moreover, it can replace with a heat conductive sheet and can also use a heat conductive paste. Furthermore, as shown in FIG. 10, in the structure in which the lower end of the main body 8 </ b> A is directly connected to the cooling plate 61, the heat conductive sheet 13 can be disposed between the cooling plate 61 and the secondary battery cell 1. .
(Thermal conductive sheet 12)

  Further, in the battery block 11 shown in the figure, the heat conductive sheet 12 is also disposed between the lower surface of the interposed piece 8B of the cooling auxiliary member 8 and the cooling plate 61. The heat conductive sheet 12 is also preferably made of a material excellent in heat conduction and further has a certain degree of elasticity. Examples of such a material include acrylic, urethane, epoxy, and silicone resins. Thus, by giving elasticity to the heat conductive sheet 12, the surface of the heat conductive sheet 12 is elastically deformed so that there is no gap at the contact surface between the cooling auxiliary member 8 and the cooling plate 61, and the thermal coupling state is improved. Can improve. This structure can also effectively conduct heat conduction by effectively preventing a gap from being generated between the interposed piece 8B of the cooling auxiliary member 8 and the cooling plate 61 and reducing thermal conductivity. Moreover, it can replace with a heat conductive sheet and can also use a heat conductive paste. Furthermore, the heat conductive sheet 12 can also electrically insulate between the battery laminated body 5 and the cooling plate 61 more reliably by giving insulation. In this structure, in addition to providing the cooling auxiliary member 8 with an insulating property, an insulating heat conductive sheet 12 is interposed, thereby further improving safety and reliability.

However, a cooling auxiliary member can also connect a lower end directly to a cooling plate, without passing a heat conductive sheet between cooling plates. For example, the cooling auxiliary member is fixed to the upper surface of the cooling plate by welding the lower end, or is bonded and fixed to the upper surface of the cooling plate, or is fixed to the upper surface of the cooling plate by a locking structure or a fitting structure. You can also As described above, the structure in which the cooling auxiliary member is directly joined to the cooling plate can realize extremely excellent thermal conductivity.
(End plate 3)

As shown in FIG. 7, a pair of end plates 3 are arranged on both end faces of the battery stack 5 in which the secondary battery cells 1 and the cooling auxiliary members 8 are alternately stacked. The pair of end plates 3 are fastened so as to sandwich the battery stack 5 from both end faces. The end plate 3 may be made of plastic or metal, or may be a laminated structure of plastic and metal.
(Fastening member 4)

As shown in FIG. 2 and FIGS. 5 to 7, the fastening members 4 are arranged on both side surfaces of the battery stack 5 in which the end plates 3 are stacked on both ends, and are fixed to the pair of end plates 3. The laminated body 5 is fastened. As shown in the exploded perspective view of FIG. 7, the fastening member 4 includes a main body 41 that covers the side surface of the battery stack 5, and a bent piece that is bent at both ends of the main body 41 and fixed to the end plate 3. 42, an upper surface holding portion 43 that is bent upward and holds the upper surface of the battery stack 5, and a fastening connection portion 44 that protrudes downward. Such a fastening member 4 is made of a material having sufficient strength, for example, a metal bind bar. In the example shown in FIG. 1, each battery block 11 is provided with a fastening member 4. In this case, the end plates 3 positioned on the respective end surfaces of each battery block 11 are fixed by the fastening member 4. In addition, in the state which arranged the two battery blocks in the lamination direction, both side surfaces can also be integrally connected by a fastening member. In this configuration, the fastening member can also be used as a member for connecting the battery blocks. In this case, the end plates positioned on the end faces are fixed by the fastening members, and the fastening members are not fixed to the end plates facing each other between the two battery blocks. Furthermore, the end plate which opposes between two battery blocks can also be shared as one component. In the figure, the bent piece 42 of the fastening member 4 and the end plate 3 are fixed by bolts 19. However, the fastening of the fastening member and the end plate is not limited to a structure of fastening with bolts.
(Insulation cover 16)

  The insulating cover 16 is made of an insulating material, covers the upper surface and both side surfaces of the battery stack 5, and insulates the surfaces of the plurality of secondary battery cells 1 stacked on each other. The insulating cover 16 is made of an insulating plastic or the like. The insulating cover 16 shown in the figure is a plastic case having a U-shaped cross section and having an open bottom surface and both end surfaces. The insulating cover 16 is provided with an opening 16b for exposing the electrode terminal 1b of each secondary battery cell 1 and an opening 16c for exposing the safety valve 1c of the secondary battery cell 1 on the upper surface. However, the insulating cover does not have to be in the form of a case, and can be an insulating sheet. Furthermore, the battery block does not necessarily have to insulate the surface of the battery stack with an insulating cover, and any other structure that can insulate the surface of the battery stack can be used. For example, the battery stack can be insulated by molding the surface with resin molding, or can be insulated by treating the inner surface of the fastening member.

Further, the battery block 11 is provided with a cover portion 24 on the upper surface of the insulating cover 16. The cover part 24 is provided with a slit 24b for communicating with the electrode terminal 1b of each secondary battery cell 1, and the bus bar 6 for connecting adjacent secondary battery cells 1 to each other through the slit 24b, The bus bar 6 and a circuit board (not shown) are electrically connected. Further, a gas duct 26 communicating with the safety valve 1 c of the secondary battery cell 1 is provided on the inner surface of the cover portion 24. By connecting the gas duct 26 to the safety valve 1c of each secondary battery cell 1 and piping the gas duct 26 to the outside, the gas discharged when the internal pressure of the secondary battery cell 1 rises can be safely externally discharged. It is trying to discharge. A circuit board (not shown) on which a control circuit for controlling the power supply device 100 is mounted is disposed on the upper surface of the cover portion 24. Further, the circuit board may be provided integrally with the cover portion. In addition, in the example of FIG. 7, although the cover part 24 and the insulating cover 16 are comprised by another member, these can also be provided integrally.
(Linked structure)

The battery block 11 includes a connection structure for fixing the battery stack 5 to the upper surface of the cooling plate 61. In the example shown in FIGS. 5 to 7, the coupling structure includes a fastening coupling portion 44 provided so as to protrude from the lower end of the main body portion 41 of the fastening member 4, and a plate coupling portion 50 provided on the cooling plate 61 side. Consists of. A plurality of fastening connecting portions 44 are provided apart from each other. In the example shown in the figure, the lower end of the main body 41 is provided at three locations on both sides and in the middle.
(Fastening connection part 44)

In the example of FIGS. 5 to 7, the fastening connection portion 44 is a locking piece 44 </ b> A having a tip formed in a hook shape. The locking piece 44 </ b> A has a hook-like protruding direction outward from the battery block 11.
(Plate connecting part 50)

On the other hand, on the cooling plate 61 side, a plate coupling portion 50 is provided as a coupling mechanism for coupling with the fastening coupling portion 44. The plate connecting portion 50 is provided at a position corresponding to the position where the fastening connecting portion 44 is provided. As such a plate connection part 50, the connection bar 50A in which the locking hole 51 which can lock the locking piece 44A was formed in the example of a figure is utilized. The fastening member 4 can be easily fixed to the cooling plate 61 by inserting and locking the hook-shaped locking pieces 44 </ b> A into the locking holes 51. The connecting bar 50 </ b> A in the figure has a shape in which the strip strip is bent in a substantially U shape in a cross-sectional view. The strip strip is made of a metal plate so as to exhibit sufficient strength. The strip strips can improve the strength by forming a step on the surface. The length of the connecting bar 50A is set such that the bottom surface of the cooling plate 61 can be sandwiched between the substantially U-shaped bent portions. A locking hole 51 is opened as a connecting portion on the end face of the connecting bar 50A. In this way, the plate connecting portion 50 can be easily added to the cooling plate 61 by using the connecting bar 50A. In particular, a coupling mechanism can be added without complicating the shape of the cooling plate 61.
(Cooling plate 61)

  The cooling plate 61 is a radiator for conducting heat of the secondary battery cell 1 to dissipate it to the outside. As shown in FIGS. 3, 4, and 14, a refrigerant pipe 62 is arranged inside the cooling plate 61. Has been established. The cooling plate 61 connects the refrigerant pipe 62 disposed therein to the cooling mechanism 60. The cooling plate 61 is cooled by supplying a refrigerant from the cooling mechanism 60 to the refrigerant pipe 62. The cooling plate 61 incorporates a metal cooling pipe 62A as a refrigerant pipe 62 through which the refrigerant passes. The cooling pipe 62A is thermally coupled to the upper surface plate 61A of the cooling plate 61, and a heat insulating material 68 is provided between the bottom plate 61B and the bottom plate 61B to insulate. As shown in FIG. 3, the cooling pipe 62 </ b> A is formed in a flat shape having a flat surface facing the battery block 11. By doing in this way, compared with a cylindrical cooling pipe, the contact area with the cooling plate 61 can be increased and the thermal coupling with the battery block 11 can be realized reliably. The cooling pipe 62A is made of a material having excellent heat conduction. Here, it is made of metal such as aluminum. In particular, since the aluminum cooling pipe is relatively soft, the surface can be slightly deformed by pressing at the contact interface with the battery block 11 to improve adhesion, and high thermal conductivity can be realized. Further, the cooling plate 61 can be constituted by only a metal plate in addition to the cooling function by the refrigerant. For example, it is made into the shape excellent in heat dissipation and heat transfer property, such as a metal body provided with a radiation fin. Or you may utilize not only metal but the heat-transfer sheet | seat which has insulation.

  In the assembled battery 10 shown in FIGS. 4 to 7, the battery block 11 in which the plurality of secondary battery cells 1 are stacked is arranged on the upper surface of the cooling plate 61. The cooling plate 61 is disposed in a thermally coupled state to the secondary battery cells 1 constituting the battery block 11. The assembled battery 10 can be effectively cooled directly by bringing the battery block 11 into contact with the cooling plate 61. In the example of FIGS. 1 and 14, two battery blocks 11 are placed on each cooling plate 61. As described above, two battery blocks 11 are connected in the length direction, that is, the stacking direction of the secondary battery cells 1 to form one battery stack continuous body 11A, and the two battery blocks in such a connected state 11 is supported by one cooling plate 61. Two assembled battery assemblies 11A are arranged in parallel to constitute the assembled battery 10.

Further, in the example of FIGS. 1 and 14, the cooling plate 61 is extended in the stacking direction of the secondary battery cells 1, and the cooling pipe 62A piped inside is meandered so as to be folded back at the edge. A row of linear cooling pipes is disposed on the lower surface of the battery block 11. And the circulation path of a refrigerant | coolant is made common by connecting cooling pipe 62A between battery laminated | stacking continuous bodies 11A. Thus, if it is set as the structure which mounts and cools the several battery block 11 on the one cooling plate 61, the cooling mechanism 60 can be shared and the cooling plate 61 is made common and cheaper and simplified cooling. The mechanism 60 can be realized. However, a plurality of cooling pipes can be arranged on the lower surface of the battery block. For example, a meandering cooling pipe can be divided at a folded portion to form a plurality of cooling pipes. Thereby, since the meandering portion can be eliminated, the weight can be reduced. At this time, the cooling pipes may be connected to share a refrigerant path. In addition, the structure and shape which arrange | position a cooling pipe can be changed suitably.
(Cooling mechanism 60)

  The cooling mechanism 60 cools the cooling plate 61 by passing the refrigerant through the refrigerant pipe 62 of the cooling plate 61 and circulating it. The cooling mechanism 60 in FIG. 14 circulates a refrigerant such as Freon or carbon dioxide through the refrigerant pipe 62 and cools the cooling plate 61 with heat of vaporization that evaporates inside the refrigerant pipe 62. As shown in FIG. 14, the cooling mechanism 60 includes a compressor 63 that pressurizes the gaseous refrigerant discharged from the cooling plate 61, a condenser 64 that cools and liquefies the refrigerant pressurized by the compressor 63, A receiver tank 65 for storing the liquid liquefied by the condenser 64 and an expansion valve 66 comprising a flow rate adjusting valve or a capillary tube 66A for supplying the refrigerant in the receiver tank 65 to the cooling plate 61 are provided. The cooling mechanism 60 supplies the liquefied refrigerant to the cooling plate 61 via the expansion valve 66, vaporizes the supplied refrigerant inside the refrigerant path, and cools the cooling plate 61 with heat of vaporization. The refrigerant evaporated by cooling the cooling plate 61 is sucked into the compressor 63 and circulated from the condenser 64 to the receiver tank 65.

  As the cooling mechanism 60 described above, an in-vehicle cooling compressor, a condenser, and a receiver tank mounted on the vehicle can be used. With such a configuration, the cooling mechanism including the compressor, the condenser, and the receiver tank can be used for both the cooling in the vehicle and the cooling mechanism 60 of the power supply device. This structure can efficiently cool the battery block 11 of the power supply device mounted on the vehicle without providing a dedicated cooling mechanism for cooling the battery block 11. In particular, the cooling calories for cooling the battery block 11 are extremely small compared to the cooling calories required for cooling the vehicle. For this reason, even if the cooling mechanism for cooling the vehicle is also used for cooling the battery block, the battery block can be effectively cooled without substantially reducing the cooling capacity of the vehicle.

  Furthermore, the cooling mechanism 60 includes a control circuit (not shown) that controls cooling of the cooling plate 61, detects the temperature of the battery cell 1 with a temperature sensor (not shown), and cools the cooling plate 61. Can also be controlled. This control circuit controls the on-off valve 67 that connects the inflow side of the cooling plate 61 to the receiver tank 65. The on-off valve 67 is opened and closed by a control circuit to control the cooling state of the cooling plate 61. When the on-off valve 67 is opened, the cooling plate 61 is in a cooled state, and when the on-off valve 36 is closed, the refrigerant is not circulated to the cooling plate 61 and the cooling plate 61 is in an uncooled state. When the temperature of the battery cell 1 becomes higher than the preset cooling start temperature, the cooling mechanism 60 supplies the coolant to the cooling plate 61 to cool it, and when the battery cell 1 becomes lower than the cooling stop temperature, the cooling plate 60 The supply of the refrigerant to 61 can be stopped and the battery cell 1 can be controlled to a preset temperature range.

The above cooling plate 61 is cooled to a low temperature by the heat of vaporization of the refrigerant, but the cooling plate can also be cooled regardless of the heat of vaporization. This cooling plate supplies a refrigerant such as brine cooled to a low temperature to the refrigerant pipe, and cools the cooling plate directly with the low-temperature refrigerant instead of the heat of vaporization of the refrigerant. The cooling mechanism that circulates the brine as the refrigerant may be configured to cool the brine with the heat of vaporization of the refrigerant. In particular, in a power supply device mounted on a vehicle, an existing cooling mechanism used for cooling the inside of the vehicle can be used for cooling the brine.
(Example 2)

In the above power supply device, the cooling auxiliary member 8 is also used as an insulating separator that insulates the secondary battery cells 1 stacked on each other, but the power supply devices are adjacent to each other as shown in FIGS. It is also possible to stack plastic insulating separators 2 that insulate the secondary battery cells 1 to be laminated. This battery block 11 is laminated in a state in which a plastic insulating separator 2 is interposed between adjacent secondary battery cells 1 to insulate adjacent secondary battery cells 1 from each other with an insulating separator 2. A cooling auxiliary member 8 is disposed between the separator 2 and the secondary battery cell 1 to cool the secondary battery cell 1 via the cooling auxiliary member 8. This battery block 11 can be laminated by insulating the outer can of the secondary battery cell 1 and the cooling auxiliary member 8 from metal and insulating them with a plastic insulating separator 2. According to this configuration, the secondary battery cell 1 can be reliably insulated, and a more reliable power supply device can be provided.
(Insulating separator 2)

  The insulating separator 2 is a spacer for insulating and laminating adjacent secondary battery cells 1. The insulating separator 2 is made of an insulating material such as plastic, and is disposed between the adjacent secondary battery cells 1 to insulate the adjacent secondary battery cells 1 from each other. As shown in the exploded perspective view of FIG. 17, the insulating separator 2 forms battery cell storage spaces 2 d for storing the secondary battery cells 1 on both sides. The storage space 2d has a shape that allows the secondary battery cell 1 to be fitted into a fixed position, and prevents the adjacent secondary battery cell 1 from being displaced.

  The insulating separator 2 in the figure includes a flat plate 2a having a size substantially equal to the main surface 1A of the secondary battery cell 1, a side wall 2b covering the outer surface 1B of the secondary battery cell 1, and a top surface of the secondary battery cell 1. And a top plate 2c covering a part of the top plate 2c. The insulating separator 2 sandwiches the secondary battery cell 1 between the two insulating separators 2 and closes the outer surface 1B portion. Therefore, the side wall 2b is approximately the same size as the outer surface 1B of the secondary battery cell 1, and the flat plate 2a is fixed to the substantially center of the side wall 2b, so that each battery cell storage space 2d has half of the side wall 2b. About 1/2 of the outer surface 1B of the secondary battery cell 1 is covered. Further, the upper surface of the battery cell storage space 2d is adjacent to the secondary battery cell 1 so that the electrode terminal 1b and the safety valve 1c are exposed while partially covering the sealing plate 1a of the secondary battery cell 1 with the top plate 2c. The upper part of the interface between each other is covered. On the other hand, the bottom surface side is opened to expose the bottom surface 1 </ b> C of the secondary battery cell 1.

  Further, a cooling auxiliary member 8 is disposed between the insulating separator 2 and the secondary battery cell 1. The same cooling auxiliary member 8 as in the first embodiment can be used. That is, the cooling auxiliary member 8X shown in FIG. 16 and FIG. 17 is arranged with the main body portion 8A thermally coupled to the main surface 1A of the secondary battery cell 1, and the bottom surface 1C of the secondary battery cell 1 and the cooling plate. An intervening piece 8 </ b> B is disposed between the first and second members 61. However, since the battery block 11 having this structure insulates the secondary battery cells 1 stacked on each other with the insulating separator 2, the cooling auxiliary member 8 does not necessarily have to have insulating properties. This battery block insulates secondary battery cells adjacent to each other through an insulating separator laminated on the cooling auxiliary member, and an insulating heat conductive sheet is laminated between the cooling auxiliary member and the cooling plate. The secondary battery cell and the cooling plate can be insulated.

  Here, in the insulating separator 2 shown in FIG. 16, the cooling auxiliary member 8 is arranged only on one side surface (right side surface in FIG. 16) of the flat plate 2a, but the cooling auxiliary member is arranged on both side surfaces of the flat plate. You can also. This structure can cool a secondary battery cell efficiently from both main surfaces.

The above power supply apparatus can be used as a vehicle-mounted power supply. As a vehicle equipped with a power supply device, an electric vehicle such as a hybrid vehicle or a plug-in hybrid vehicle that runs with both an engine and a motor, or an electric vehicle that runs only with a motor can be used, and is used as a power source for these vehicles. .
(Power supply device for hybrid vehicles)

FIG. 18 shows an example in which a power supply device is mounted on a hybrid vehicle that runs with both an engine and a motor. A vehicle HV equipped with the power supply device shown in this figure includes an engine 96 and a travel motor 93 that travel the vehicle HV, a power supply device 100 that supplies power to the motor 93, and a generator that charges a battery of the power supply device 100. 94. The power supply apparatus 100 is connected to a motor 93 and a generator 94 via a DC / AC inverter 95. The vehicle HV travels by both the motor 93 and the engine 96 while charging / discharging the battery of the power supply device 100. The motor 93 is driven to drive the vehicle when the engine efficiency is low, for example, during acceleration or low-speed driving. The motor 93 is driven by power supplied from the power supply device 100. The generator 94 is driven by the engine 96 or is driven by regenerative braking when the vehicle is braked to charge the battery of the power supply device 100.
(Power supply for electric vehicles)

FIG. 19 shows an example in which a power supply device is mounted on an electric vehicle that runs only with a motor. A vehicle EV equipped with the power supply device shown in this figure includes a traveling motor 93 for traveling the vehicle EV, a power supply device 100 that supplies power to the motor 93, and a generator 94 that charges a battery of the power supply device 100. And. The power supply apparatus 100 is connected to a motor 93 and a generator 94 via a DC / AC inverter 95. The motor 93 is driven by power supplied from the power supply device 100. The generator 94 is driven by energy when regeneratively braking the vehicle EV and charges the battery of the power supply device 100.
(Power storage device for power storage)

  Furthermore, this power supply apparatus can be used not only as a power source for a moving body but also as a stationary power storage facility. For example, as a power source for home and factory use, a power supply system that is charged with sunlight or midnight power and discharged when necessary, or a streetlight power supply that charges sunlight during the day and discharges at night, or during a power outage It can also be used as a backup power source for driving signals. Such an example is shown in FIG. The power supply apparatus 100 shown in this figure forms a battery unit 82 by connecting a plurality of battery packs 81 in a unit shape. Each battery pack 81 has a plurality of secondary battery cells 1 connected in series and / or in parallel. Each battery pack 81 is controlled by a power controller 84. The power supply apparatus 100 drives the load LD after charging the battery unit 82 with the charging power supply CP. For this reason, the power supply apparatus 100 includes a charging mode and a discharging mode. The load LD and the charging power source CP are connected to the power supply device 100 via the discharging switch DS and the charging switch CS, respectively. ON / OFF of the discharge switch DS and the charge switch CS is switched by the power supply controller 84 of the power supply apparatus 100. In the charging mode, the power supply controller 84 switches the charging switch CS to ON and the discharging switch DS to OFF to permit charging from the charging power supply CP to the power supply apparatus 100. Further, when the charging is completed and the battery is fully charged, or in response to a request from the load LD in a state where a capacity of a predetermined value or more is charged, the power controller 84 turns off the charging switch CS and turns on the discharging switch DS to discharge. The mode is switched to permit discharge from the power supply apparatus 100 to the load LD. Further, if necessary, the charge switch CS can be turned on and the discharge switch DS can be turned on to supply power to the load LD and charge the power supply device 100 at the same time.

  A load LD driven by the power supply apparatus 100 is connected to the power supply apparatus 100 via a discharge switch DS. In the discharge mode of the power supply apparatus 100, the power supply controller 84 switches the discharge switch DS to ON, connects to the load LD, and drives the load LD with the power from the power supply apparatus 100. As the discharge switch DS, a switching element such as an FET can be used. ON / OFF of the discharge switch DS is controlled by the power supply controller 84 of the power supply apparatus 100. The power controller 84 also includes a communication interface for communicating with external devices. In the example of FIG. 17, the host device HT is connected in accordance with an existing communication protocol such as UART or RS-232C. Further, if necessary, a user interface for the user to operate the power supply system can be provided.

  Each battery pack 81 includes a signal terminal and a power supply terminal. The signal terminals include a pack input / output terminal DI, a pack abnormality output terminal DA, and a pack connection terminal DO. The pack input / output terminal DI is a terminal for inputting / outputting signals from other pack batteries and the power supply controller 84, and the pack connection terminal DO is for inputting / outputting signals to / from other pack batteries which are child packs. Terminal. The pack abnormality output terminal DA is a terminal for outputting the abnormality of the battery pack to the outside. Furthermore, the power supply terminal is a terminal for connecting the battery packs 81 in series and in parallel. The battery units 82 are connected to the output line OL via the parallel connection switch 85 and are connected in parallel to each other.

  A power supply apparatus according to the present invention, a vehicle including the power supply apparatus, and a method for manufacturing the power supply apparatus are provided as a power supply apparatus for a plug-in hybrid electric vehicle, a hybrid electric vehicle, an electric vehicle, or the like that can switch between an EV traveling mode and an HEV traveling mode. It can be suitably used. Also, a backup power supply device that can be mounted on a rack of a computer server, a backup power supply device for a wireless base station such as a mobile phone, a power storage device for home use and a factory, a power supply for a street light, etc. Also, it can be used as appropriate for applications such as a backup power source such as a traffic light.

DESCRIPTION OF SYMBOLS 100 ... Power supply device 1 ... Secondary battery cell; 1X ... One surface; 1Y ... Other surface; 1A ... Main surface; 1B ... Outer surface; 1C ... Bottom surface 1a ... Sealing plate; 1b ... Electrode terminal; 2a ... flat plate; 2b ... side wall; 2c ... top plate; 2d ... storage space 3 ... end plate 4 ... fastening member 5 ... battery stack 6 ... bus bar 8 ... cooling auxiliary member; 8A ... body part; 8B ... interposition piece; 8C ... cover piece 8a ... through hole; 8b ... through hole 8X ... cooling auxiliary member; 8Y ... cooling auxiliary member; 8Z ... cooling auxiliary member 8P ... cooling auxiliary member; 8Q ... cooling auxiliary member; 8R ... cooling auxiliary member 10 ... set Battery 11 ... Battery block; 11A ... Battery laminated continuum 12 ... Heat conductive sheet 13 ... Heat conductive sheet 16 ... Insulating cover; 16b ... Opening part; 16c ... Opening part 17 ... Non-cooling part 18 ... Insulating layer 19 ... Bolt 24 ... Cover part; 24b ... Lit 26 ... Gas duct 41 ... Main body 42 ... Bending piece 43 ... Upper surface holding part 44 ... Fastening connection part; 44A ... Locking piece 50 ... Plate connection part; 50A ... Connection bar 51 ... Locking hole 60 ... Cooling mechanism 61 ... Cooling plate; 61A ... Top plate; 61B ... Bottom plate 62 ... Refrigerant piping; 62A ... Cooling pipe 63 ... Compressor 64 ... Condenser 65 ... Receiver tank 66 ... Expansion valve; 66A ... Capillary tube 67 ... Open / close valve 68 ... Insulation material 70 ... Exterior Case 71 ... Lower case 72 ... Upper case 73 ... End face plate 74 ... Bump 81 ... Battery pack 82 ... Battery unit 84 ... Power supply controller 85 ... Parallel connection switch 93 ... Motor 94 ... Generator 95 ... DC / AC inverter 96 ... Engine EV, HV ... Vehicle LD ... Load; CP ... Charging power supply; DS ... Discharge switch; CS ... Charge switch OL Output lines; HT ... host device DI ... pack input-output terminal; DA ... pack abnormality output terminal; DO ... pack connection terminal 201 ... battery cell; 201X ... bottom; 201Z ... top 261 ... cooling plate

Claims (11)

A secondary battery cell having a rectangular outer shape;
A power supply device that is disposed to face one surface of the secondary battery cell and includes a cooling plate that cools the secondary battery cell from one surface of the secondary battery cell,
Furthermore, a cooling auxiliary member is provided on the other surface of the secondary battery cell adjacent to the one surface,
The power supply apparatus according to claim 1, wherein the cooling auxiliary member is configured to be in a thermally coupled state with the secondary battery cell and the cooling plate. The power supply device according to claim 1,
One surface of the said secondary battery cell is a bottom face, The other surface of the said secondary battery cell is a main surface, The power supply device characterized by the above-mentioned. The power supply device according to claim 1 or 2,
The cooling auxiliary member further includes
A main body portion facing the other surface of the secondary battery cell, and an interposition piece interposed between one surface of the secondary battery cell and the cooling plate,
The power supply apparatus, wherein the main body and the interposition piece are joined by integral molding. The power supply device according to any one of claims 1 to 3,
The power supply apparatus according to claim 1, wherein the cooling auxiliary member has an insulating property. The power supply device according to claim 4,
A power supply device comprising: a plurality of the secondary battery cells stacked, and a battery block formed by arranging the cooling auxiliary member between adjacent secondary battery cells. The power supply device according to any one of claims 1 to 5, further comprising:
A power supply device comprising a heat conductive sheet having thermal conductivity and elasticity, which is disposed between the cooling auxiliary member and the secondary battery cell. The power supply device according to any one of claims 1 to 6, further comprising:
The cooling auxiliary member includes a main body portion facing the other surface of the secondary battery cell, and an interposed piece interposed between one surface of the secondary battery cell and the cooling plate,
Between the interposed piece and the cooling plate is disposed a heat conductive sheet having thermal conductivity and elasticity,
A power supply device comprising a heat conductive sheet having heat conductivity and elasticity between the interposition piece and the bottom surface of the secondary battery cell. The power supply device according to claim 1 or 2,
The power supply device, wherein the cooling auxiliary member is directly joined to the cooling plate. The power supply device according to any one of claims 1 to 8,
The power supply apparatus, wherein the cooling plate includes a refrigerant pipe through which a refrigerant flows.   A vehicle comprising the power supply device according to any one of claims 1 to 9.   A power storage device comprising the power supply device according to any one of claims 1 to 9.

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