WO2013002090A1

WO2013002090A1 - Power supply device, vehicle including same, and method for manufacturing power supply device

Info

Publication number: WO2013002090A1
Application number: PCT/JP2012/065725
Authority: WO
Inventors: 高志瀬戸; 土屋　正樹; 康広浅井; 橋本　裕之; 貴英籠谷
Original assignee: 三洋電機株式会社
Priority date: 2011-06-30
Filing date: 2012-06-20
Publication date: 2013-01-03

Abstract

[Problem] It make it possible to maintain thermal coupling between a battery cell and a cooling plate, while avoiding a situation in which condensation occurs on the surface of the battery cell. [Solution] Provided is a power supply device that includes: a battery stack that is formed by stacking a plurality of square-shaped battery cells (1); a covering case (16) that covers the outside of the battery stack (5) apart from a portion of one surface of the battery stack (5); and a cooling plate (61) that is placed on the one surface of the battery stack (5) in a thermal coupling state to perform heat exchange with the battery stack (5) by having a refrigerant flowing therein. The power supply device further includes a waterproof sheet (19) that covers the one surface of the battery stack (5), a filling layer (18) formed by injecting a filling material is interposed between the battery stack (5) and the coating case (16), and the waterproof sheet (19) is fixed by the filling layer (18).

Description

Power supply device, vehicle equipped with the same, and method of manufacturing power supply device

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

There is a demand for power supplies with high output, such as battery packs 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. The battery cell generates heat when charged and discharged with a large current. In particular, the amount of heat generation increases as the number of battery cells used increases. Therefore, there is a need for a heat dissipation mechanism that efficiently conducts and dissipates heat dissipation from battery cells. As such a heat dissipation mechanism, in addition to an air cooling method in which cooling air is blown to the battery cell, a method in which a cooling pipe supplied and circulated with refrigerant is brought into contact with the battery cell and directly cooled by heat exchange has been proposed. (For example, see Patent Documents 1 to 3). In such a battery system, for example, as shown in FIGS. 18 and 19, a cooling pipe 260 for circulating a refrigerant is arranged on the lower surface of the battery stack 205 in which the battery cells 201 are stacked, and is connected to the cooling mechanism 269. Thus, heat is taken from the battery stack 205 via the cooling pipe 260 or the cooling plate 261 to be cooled. In the example of FIG. 18, the cooling pipe 260 is extended and piped in a direction crossing the stacking direction in which the battery cells 201 are stacked. In the example of FIG. 19, the cooling pipe 260 is extended and connected in parallel with the stacking direction in which the battery cells 201 are stacked. Further, in the example of FIG. 20, the cooling plate 261 is disposed on the lower surface of the battery stack 205 and the cooling pipe 260 is provided on the cooling plate 261, so that the cooling is performed by removing heat from the battery stack 205 via the cooling plate 261. I am letting.

In these cooling methods, it is possible to take heat of the battery cells more efficiently by heat exchange using a refrigerant, compared to an air-cooling type cooling method in which cooling air is blown into a gap between adjacent battery cells. On the other hand, as a result of the cooling performance being relatively low due to the high cooling performance, the temperature may drop below the dew point, causing moisture in the air to cool and condensation on the surface of the battery cell. If such condensation occurs, unintended energization may occur or corrosion may occur.

As a countermeasure for this, the surface of the battery cell, which is a metal outer can, is completely covered with resin, etc., and the air layer is removed from the surface of the battery cell, so that moisture contained in the air is condensed. It is possible to avoid it. However, if the periphery of the battery cell is completely covered with the resin, the thermal coupling with the cooling plate is hindered, resulting in a problem that the cooling capacity is lowered. However, when one surface (for example, the bottom surface) of the battery stack is opened and the cooling plate is disposed here, a gap is generated between the cooling plate and the battery stack. In addition, even if the gap between the cooling plate and the cooling plate can be eliminated, it is difficult to completely cover the battery stack at the edge of the joint portion of the cooling plate with the battery stack. Could not be prevented from occurring. Thus, since covering the battery laminate and structurally conflicting with the cooling plate are structurally contradictory, it is difficult to achieve both, and it has been possible to obtain a power supply device that satisfies these conditions. There wasn't.

JP 2009-134901 A JP 2009-134936 A JP 2010-15788 A Japanese Utility Model Publication No. 34-16929 JP 2005-149837 A Japanese Patent Laid-Open No. 2002-100407

The present invention has been made to solve such conventional problems. SUMMARY OF THE INVENTION The main object of the present invention is to provide a power supply device capable of maintaining the thermal coupling between the battery cell and the cooling plate while avoiding the situation of condensation on the surface of the battery cell, a vehicle equipped with the power supply device, and a method for manufacturing the power supply device. It is in.

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, a battery laminate 5 formed by laminating a plurality of rectangular battery cells 1 and the outside of the battery laminate 5 are provided. A covering case 16 that covers a part of one surface of the battery stack 5 and a heat-bonded state disposed on one surface of the battery stack 5 and flowing a refrigerant therein to exchange heat with the battery stack 5 A cooling plate 61 for carrying out the operation, wherein the power supply device further includes a waterproof sheet 19 that covers one surface of the battery stack 5, and the battery stack 5 and the covering case 16. The waterproof sheet 19 can be fixed with the filler layer 18 by interposing a filler layer 18 formed by injecting filler into the gap. Thereby, the gap between the outer surface of the battery stack and the inner surface of the covering case is eliminated by the filling layer formed by injecting the filler, and condensation due to the air layer interposed can be prevented. In addition, on the surface to be thermally coupled to the cooling plate, a waterproof sheet can be applied instead of the filling layer to exhibit waterproofness, and the waterproof sheet is also attached to the battery laminate by curing of the filler forming the filling layer. Since it can be fixed, there is an advantage that reliability can be improved.

Further, according to the power supply device according to the second aspect, the covering case 16 has a pair of projecting portions 16b formed so as to project from both sides with respect to one surface of the battery laminate 5; The waterproof sheet 19 can be gripped by the pair of overhang portions 16b. Thereby, since it can hold | maintain so that one surface of a battery laminated body may wrap around from both sides, it can be easy to implement | achieve a sealing structure.

Further, according to the power supply device according to the third aspect, the waterproof sheet 19 can be further fixed to the projecting portion 16b. Thereby, while being able to fix the edge of a waterproof sheet to a covering case, the flooding from this part can be prevented.

Furthermore, according to the power supply device which concerns on a 4th side surface, it is further provided with the heat conductive sheet 12 which has insulation and heat conductivity interposed between the said cooling plate and the said battery laminated body 5, and the said heat | fever The conductive sheet 12 can further have elasticity. Thereby, it is possible to maintain high thermal conductivity while achieving insulation between the battery stack and the cooling plate with an insulating thermal conductive sheet. Further, the elasticity of the heat conductive sheet can reduce the generation of gaps at the contact interface between the battery stack and the cooling plate, and can also avoid the situation where heat conduction is hindered by the formation of the air layer.

Furthermore, according to the power supply device of the fifth aspect, the covering case 16 forms an opening that opens a region sandwiched between the pair of projecting portions 16b, and the cooling plate 61 includes the opening. The portion can be formed in a size that can be closed. Thereby, the opening part is provided in one surface of a battery laminated body, and the circumference | surroundings of a battery laminated body can be completely coat | covered by obstruct | occluding this opening part with a cooling plate.

Furthermore, according to the power supply device according to the sixth aspect, one surface of the battery stack 5 can be the bottom surface of the battery stack 5. Thereby, while cooling with a cooling plate from the bottom face of a battery laminated body, the circumference | surroundings can be coat | covered and generation | occurrence | production of dew condensation can be prevented effectively.

Furthermore, according to the power supply device of the seventh aspect, the covering case 16 can be made of resin, and the filler can be made of the same resin as the covering case 16. Thereby, when a filler hardens | cures, adhesiveness with a coating | coated case can also be improved.

Furthermore, according to the power supply device of the eighth aspect, the filler can be a urethane resin.

Furthermore, according to the power supply device which concerns on a 9th side surface, a part of said waterproof sheet | seat 19 can be removed so that the said heat conductive sheet 12 and a part of said battery laminated body 5 may be made to contact directly. . Thereby, by making a battery laminated body and a heat conductive sheet contact directly, thermal resistance can be reduced and the heat dissipation by a cooling plate can be improved.

Furthermore, according to the power supply device according to the tenth aspect, a vehicle equipped with the power supply device described above can be provided.

Furthermore, according to the method for manufacturing the power supply device according to the eleventh aspect, a battery laminate 5 formed by laminating a plurality of rectangular battery cells 1 and the outside of the battery laminate 5 are connected to one surface of the battery laminate 5. A coating case 16 that covers a part of the battery stack 5 and a cooling plate 61 that is disposed in one surface of the battery stack 5 in a heat-coupled state and exchanges heat with the battery stack 5 by flowing a refrigerant therein. And a method of manufacturing a power supply device comprising: an insulating and thermally conductive, and thermally conductive sheet 12 interposed between the cooling plate and the battery stack 5. The outside of the battery laminate 5 is covered with a waterproof sheet 19 on one surface of the battery laminate 5, and the other surface of the battery laminate 5 is covered with a covering case 16. The waterproof sheet is covered with the covering case 16 on the finished surface. A jig JG is disposed so as to press the waterproof sheet 19 against the battery stack 5 in the opening where the waterproof sheet 19 is exposed from the covering case 16 while covering the periphery of the cover 9. , A step of injecting a filler into the gap between the battery stack 5 and the covering case 16 to form a filling layer 18; a step of removing the jig JG after the hardening of the filling layer 18; The step of disposing the heat conductive sheet 12 and the cooling plate 61 may be included. Thereby, the gap between the outer surface of the battery stack and the inner surface of the covering case is eliminated by the filling layer formed by injecting the filler, and condensation due to the air layer interposed can be prevented. In addition, on the surface that performs thermal coupling with the cooling plate, a waterproof sheet can be applied instead of the filling layer to provide waterproofness, and further, the waterproof sheet can be fixed to the battery stack by curing the filling layer. The advantage that the property is also improved is obtained.

Furthermore, according to the method for manufacturing the power supply device according to the twelfth aspect, the step of removing a portion of the waterproof sheet 19 that is not fixed by the filling layer 18 before the heat conductive sheet 12 is disposed. Can be included. Thereby, by making a battery laminated body and a heat conductive sheet contact directly, thermal resistance can be reduced and the heat dissipation by a cooling plate can be improved.

It is a disassembled perspective view of a power supply device provided with the power supply device which concerns on Example 1 of this invention. It is a perspective view which shows the assembled battery of FIG. It is a disassembled perspective view which shows the state which removed the cooling plate from the battery laminated body of FIG. It is the perspective view which looked at the battery laminated body of FIG. 2 from diagonally downward. It is a disassembled perspective view which shows the assembled battery of FIG. It is a disassembled perspective view of the battery laminated body of FIG. It is sectional drawing which shows the power supply device which concerns on a modification. It is a schematic cross section which shows the example which arrange | positions a water absorbing sheet to a battery laminated body. FIG. 6 is a cross-sectional view illustrating a power supply device according to a second embodiment. It is sectional drawing which shows the assembly state of the power supply device shown in FIG. It is a disassembled sectional view which shows the state which arrange | positions a heat conductive sheet and a cooling plate in the power supply device shown in FIG. It is a schematic plan view which shows the arrangement | positioning state of a cooling plate. It is a schematic cross section which shows the battery laminated body which has arrange | positioned the cooling pipe which concerns on Example 3 on the lower surface. 6 is a schematic cross-sectional view showing a battery stack according to Example 4. 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 perspective view which shows the cooling mechanism of the conventional power supply device. It is a perspective view which shows the cooling mechanism of the other conventional power supply device. It is a perspective view which shows the cooling mechanism of the further another 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. In these drawings, FIG. 1 is an exploded perspective view of the power supply device 100, FIG. 2 is a perspective view showing the battery stack 5 of FIG. 1, and FIG. 3 is an exploded perspective view with the cooling plate 61 removed from the battery stack 5 of FIG. 4 is a perspective view of the battery stack 5 of FIG. 2 as viewed obliquely from below, FIG. 5 is an exploded perspective view of the battery stack 5 of FIG. 2, and FIG. 6 is an exploded perspective view of the battery stack 5 of FIG. 7 is a cross-sectional view showing a power supply device according to a modification, and FIG. 8 is a schematic cross-sectional view showing an example in which a water absorbent sheet is disposed between the battery stack 5 and the covering case 16. This power supply device 100 is mainly mounted 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 and causing the vehicle to travel. However, the power supply device of the present invention can be used for an electric vehicle other than a hybrid vehicle or an electric vehicle, and can also be used for an application requiring a high output other than an electric vehicle.
(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 the power supply device 100, a box-shaped outer case 70 is divided into two, and a plurality of assembled batteries 10 are 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 and a nut. The outer case 70 has a flange 74 disposed on the side surface of the outer case 70. Further, in the example shown in FIG. 1, two battery stacks 5 are housed in the lower case 71 in total, two in the longitudinal direction and two in the lateral direction. Each battery stack 5 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 is composed of four battery stacks 5 in the example shown in FIG. That is, two battery stacks 5 are connected in the stacking direction of the rectangular battery cells 1 to form one battery stack continuous body 10B, and two battery stack continuous bodies 10B in such a connected state are arranged in parallel. The assembled battery 10 is configured.

FIG. 2 shows a perspective view of each battery stack 5 constituting the assembled battery 10. The battery stack 5 is fixed on a cooling plate 61 for cooling it. As shown in FIGS. 2 to 5, the battery stack 5 has a connection structure for fixing on the cooling plate 61 (details will be described later).

As shown in FIGS. 5 and 6, each battery stack 5 is a separator that insulates the prismatic battery cells 1 by interposing them on a surface where a plurality of prismatic battery cells 1 and a plurality of prismatic battery cells 1 are stacked. 2, a covering case 16 that houses a battery stack 5 in which a plurality of prismatic battery cells 1 and separators 2 are alternately stacked, a pair of end plates 3 that are disposed on the end surface of the battery stack 5 in the stacking direction, and a battery A plurality of metal fastening members 4 that fasten the end plates 3 disposed on both end faces of the laminate 5 are provided.
(Battery laminate 5)

As shown in FIG. 6, the battery stack 5 is formed by stacking a plurality of rectangular battery cells 1 with an insulating separator 2 interposed therebetween. Further, as shown in FIG. 5, a pair of end plates 3 are arranged on both end faces of the battery stack 5, and the pair of end plates 3 are connected by a fastening member 4. In this way, a battery stack 5 in which a plurality of prismatic battery cells 1 and separators 2 are alternately stacked by interposing a separator 2 that insulates adjacent prismatic battery cells 1 on a stacking surface of the prismatic battery cells 1. Yes.
(Square battery cell 1)

As shown in FIG. 6, the rectangular battery cell 1 has an outer can constituting the outer shape of a rectangular shape whose thickness is smaller than the width. Positive and negative electrode terminals are provided on the sealing plate for closing the outer can, and a safety valve is provided between the electrode terminals. The safety valve 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. The unit cell constituting the rectangular 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 prismatic 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. Furthermore, the battery cell used in the present invention is not limited to a rectangular battery cell, but may be a cylindrical battery cell or a rectangular battery cell in which an exterior body is covered with a laminate material or other shapes.

The respective rectangular battery cells 1 that are stacked to form the battery stack 5 are connected in series by connecting adjacent positive and negative electrode terminals with a bus bar 6. The assembled battery 10 in which the adjacent rectangular battery cells 1 are connected in series can increase the output voltage and increase the output. However, an assembled battery can connect adjacent square battery cells in parallel, or can combine a series connection and a parallel connection into multiple parallels or multiple parallels. The rectangular battery cell 1 is manufactured with a metal outer can. In this rectangular battery cell 1, an insulating separator 2 is sandwiched between the adjacent rectangular battery cells 1 in order to prevent short-circuiting of the outer can of the rectangular battery cell 1. Note that the outer can of the rectangular battery cell can also be made of an insulating material such as plastic. In this case, since it is not necessary for the rectangular battery cell to insulate and laminate the outer can, the separator can be made of metal or the separator can be made unnecessary.
(Separator 2)

Separator 2 is a spacer for insulating and stacking adjacent rectangular battery cells 1 electrically and thermally. The separator 2 is made of an insulating material such as plastic, and is disposed between the adjacent rectangular battery cells 1 to insulate the adjacent rectangular battery cells 1.

Here, by ensuring insulation between the covering case 16 and the rectangular battery cell 1, the side surface of the separator 2 can be simplified and downsized. That is, in the example shown in FIGS. 5 and 6, since the side surface of the battery stack 5 can be protected by making the side surface of the covering case 16 insulative, the separator 2 only has to insulate only the surface where the rectangular battery cells 1 face each other. It is not necessary to cover the side surface of the rectangular battery cell with a separator. For this reason, it is possible to reduce the size by eliminating the part protruding from the side surface of the separator so as to cover the side surface of the battery stack 5. Or what hold | maintained the separator itself in the chamfering part of the square battery cell side surface for holding and positioning can also be used. Since this separator can be configured to be substantially flush with the surface of the prismatic battery cell on the side surface of the battery stack, the lateral width of the battery stack can be reduced. In addition, it is possible to position the separators by providing a fitting structure with unevenness on the upper surface of the separators. On the other hand, the protruding portion provided on the side surface of the separator is provided for positioning the battery cells to be stacked.

The entire covering case may be made of metal. In this case, since the side surface of the covering case is also made of metal, it is preferable to cover the side surface of the rectangular battery cell with a separator in order to insulate the rectangular battery cells on the side surface of the battery stack. On the other hand, the battery laminated body does not necessarily need to interpose a separator between square battery cells. For example, the prismatic battery cell outer cans are molded with an insulating material, or the outer periphery of the prismatic battery cell outer cans are covered with a heat-shrinkable tube, insulating sheet, insulating paint, etc. By insulating, a separator can be made unnecessary. In particular, a method of cooling the battery stack through a cooling plate cooled by using a refrigerant or the like is employed, instead of an air cooling method in which cooling air is forced between the rectangular battery cells to cool the rectangular battery cells. In the configuration, it is not always necessary to interpose a separator between the rectangular battery cells. Furthermore, in the configuration that employs a system that cools the battery stack through a cooling plate that has been cooled using a refrigerant or the like, an air cooling system that cools the prismatic battery cells by forcibly blowing cooling air between the prismatic battery cells. As described above, since it is not necessary to provide an air path for flowing cooling air to the insulating separator interposed between the square battery cells, the length of the square battery cells in the stacking direction can be shortened. This can reduce the size of the battery stack.
(End plate 3)

As shown in FIG. 5, a pair of end plates 3 are arranged on both end faces of the battery stack 5 in which the rectangular battery cells 1 and the separators 2 are alternately stacked. With the pair of end plates 3, the battery stack 5 is fastened so as to be sandwiched from both sides. The end plate 3 is made of a material that exhibits sufficient strength, for example, metal. Further, the end plate 3 may be provided with a fixing structure for fixing to the lower case 71 shown in FIG.

In the example of FIG. 5, both end surfaces of the covering case 16 are opened, but the present invention is not limited to this configuration. For example, the end surface of one covering case can be closed in advance. In this case, after the battery stack is inserted from the other opening end face, the covering end case can be closed around the side surface by closing the opening end face with one end plate.
(Fastening member 4)

As shown in FIGS. 2 to 5, the fastening members 4 are arranged on both side surfaces of the battery stack 5 in which the end plates 3 are stacked at both ends, and are fixed to the pair of end plates 3 so that the battery stack 5 is fixed. Conclude. As shown in the perspective view of FIG. 5, the fastening member 4 includes a main body 41 that covers the side surface of the battery stack 5, and a bent piece 42 that is bent at both ends of the main body 41 and fixed to the end plate 3. And an upper surface holding portion 43 that is bent upward to hold the upper surface of the battery stack 5 and a fastening connecting 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 addition, in the example shown in FIG. 1, the fastening member is provided in each battery laminated body 5, respectively, In this case, the end plates located in each end surface are fixed to each battery laminated body 5 with a fastening member. In addition, in the state which arranged the two battery laminated bodies 5 in the lamination direction, both side surfaces can also be integrally connected by the fastening member 4. FIG. In this configuration, the fastening member 4 is also used as a member for connecting the battery stacks 5 to each other. Here, the end plates 3 positioned on the end surfaces are fixed to each other by the fastening members 4, and the fastening members are not fixed to the end plates 3 facing each other between the two battery stacks 5. Furthermore, the end plate 3 which opposes between two battery laminated bodies 5 can also be shared as one component. The fixing of the end plate and the fastening member is not limited to the structure of fixing with the bolt described in the embodiment.
(Coating case 16)

The battery stack 5 is covered with a covering case 16. In Example 1, as shown in the exploded perspective view of FIG. 5, the battery stack 5 includes a covering case 16 having a U-shaped cross section and opening the lower surface and both end surfaces, and an end plate 3 covering both ends of the covering case 16. , A waterproof sheet 19 that covers the bottom surface of the battery stack 5, a cooling plate 61 that closes the opening of the covering case 16, and a heat conductive sheet 12 that is disposed between the cooling plate 61 and the waterproof sheet 19. Is done. Here, the end plate 3 that holds the battery stack 5 from both end faces is also used as the end face of the covering case 16. A packing 3 b is provided inside the end plate 3. The packing 3b is a sheet-like elastic member. By covering the battery stack 5 with the covering case 16 in this way, a sealed structure is realized. The covering case 16 insulates the inner surfaces of the stacked rectangular battery cells 1 from each other.

Further, a cover portion 24 is provided on the upper surface of the covering case 16. The cover portion 24 is provided with slits for communicating with the electrode terminals of the respective battery cells, and electrical connection between the bus bars 6 for connecting adjacent battery cells through the slits and the bus bar 6 and the circuit board is obtained. It is done. Further, the cover portion 24 is provided with a filler inlet for injecting a filler. After the covering case 16 is closed with the cover portion 24, the potting material can be filled. In this case, there is an advantage that a gap between the cover part 24 and the covering case 16 or a gap between the cover part 24 and the battery stack 5 can be filled. In this way, it is possible to avoid the situation where the prismatic battery cell 1 is covered and the surface is condensed.

Further, a gas duct 26 communicating with the safety valve of the rectangular battery cell 1 is provided on the inner surface of the cover portion 24. By connecting the gas duct 26 to the safety valve of each rectangular battery cell 1 and piping the gas duct 26 to the outside, the gas discharged when the internal pressure of the rectangular battery cell 1 rises can be safely discharged to the outside. A circuit board 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 integrally provided in the cover portion.

In addition, in the example of FIG. 5, although the cover part 24 is provided integrally with the covering case 16, these can also be comprised by another member. Such an example is shown in FIG. 7 as a modified example. The covering case 16B shown in this figure closes the upper surface with the cover portion 24B as a separate member.

In this way, the battery stack 5 is accommodated in the covering case 16. The covering case 16 can also hermetically seal the fitting portion by using a case member constituting each surface as a fitting structure. As such a fitting structure, a packing, an O-ring, a gasket or the like can be used, and the covering case 16 can be sealed.
(Overhang 16b)

Further, as shown in the cross-sectional view of FIG. 8 and the like, the covering case 16 is provided with a protruding portion 16b protruding from the side edge to the bottom surface at the corner of the battery stack 5 at the bottom. The overhanging portion 16b holds the bottom surface of the battery stack 5 at the corners on both sides. On the other hand, since the covering case 16 covers the upper surface of the battery stack 5, the top surface of the battery cells constituting the battery stack 5 is the same by sandwiching the battery stack 5 from above and below with the covering case 16. They can be arranged on a plane. In other words, by aligning the bottom surface of the battery stack 5 to the same surface, the connection surface with the cooling plate 61 can be made flat, and the stability and reliability of thermal coupling can be improved. In addition, the opening on the bottom surface of the covering case 16 can be used for fixing when the waterproof sheet 19 covers the opening.
(Aperture)

The covering case 16 is an opening having a bottom opening. The opening is a region sandwiched between the pair of overhang portions 16b. The opening has a size that can be closed by the cooling plate 61. On the other hand, the outer shape of the heat conductive sheet 12 is formed to be substantially the same as or slightly smaller than the opening so that the heat conductive sheet 12 can be inserted into the opening.
(Thermal conductive sheet 12)

In addition, a heat transfer member such as the heat conductive sheet 12 is interposed between the battery stack 5 and the cooling plate 61. The heat conductive sheet 12 is made of a material that is insulating and excellent in heat conduction, and more preferably has a certain degree of elasticity. Examples of such a material include acrylic, urethane, epoxy, and silicone resins. By doing in this way, between the battery laminated body 5 and the cooling plate 61 is electrically insulated. In particular, when the outer can of the square battery cell 1 is made of metal and the cooling plate 61 is made of metal, it is necessary to insulate the battery so as not to conduct at the bottom surface of the square battery cell 1. As described above, the surface of the outer can is covered and insulated with a heat-shrinkable tube or the like, and in order to further improve the insulation, the insulating heat conductive sheet 12 is interposed to enhance safety and reliability. Moreover, it can replace with a heat conductive sheet and can also use a heat conductive paste. Furthermore, an additional insulating film can be interposed in order to reliably maintain the insulating property. In addition, the cooling pipe can be made of an insulating material. When sufficient insulation is achieved in this way, the heat conductive sheet or the like may be omitted.

Moreover, by giving elasticity to the heat conductive sheet 12, the surface of the heat conductive sheet 12 is elastically deformed to eliminate a gap at the contact surface between the battery stack 5 and the cooling plate 61, and the thermal coupling state can be improved satisfactorily.
(Waterproof structure)

The battery stack 5 is covered with a covering case 16 to have a waterproof structure. Thereby, intrusion of dust and moisture from the outside can be prevented, and unintended conduction and corrosion can be avoided. On the other hand, it is possible to protect not only moisture entering from the outside but also water droplets generated by condensation inside. In particular, if a cooling system that takes heat away from the prismatic battery cells by heat exchange using a refrigerant is used as a cooling system for the prismatic battery cells, the cooling can be performed more efficiently, but the temperature drops below the dew point due to high cooling performance. Thus, moisture in the air present around the battery stack may be cooled to cause condensation on the surface of the prismatic battery cell. Therefore, in order to protect the surface of the battery stack 5 surrounded by the cover case 16 from such water droplets, instead of simply making the cover case 16 waterproof, the surface of the battery stack 5 is covered with the filling layer 18. Thus, the gap is filled.
(Filling layer 18)

FIG. 8 shows a cross-sectional view of the battery stack 5 having such a waterproof structure. As shown in this figure, a filling layer 18 is disposed between the battery stack 5 and the covering case 16. That is, by filling the gap between the battery stack 5 and the covering case 16 with the filler, and providing the filling layer 18, moisture in the air existing in the gap is condensed and the battery stack 5 is adversely affected. The situation to give is avoided.

In the example of Example 1, the battery stack 5 is covered with a filler as the filler layer 18. Here, in order to hold the filler on the surface of the battery stack 5, the filler is injected between the battery stack 5 and the covering case 16 by surrounding the battery stack 5 with the covering case 16. Yes. As a result, the space between the battery stack 5 and the covering case 16 is eliminated, and a situation in which the surface of the battery stack 5 is dewed and adversely affected can be avoided. In Example 1, in order to realize a waterproof structure with the end plate 3 and the covering case 16, after fastening by the fastening member 4, in the space surrounded by the end plate 3 and the covering case 16, The filling layer 18 is filled with a filler. Thereby, a waterproof structure in which the periphery of the battery stack 5 is waterproof is obtained.
(Filler)

A potting material that fills the gap can be used as the filler. As such a potting material, urethane resin can be preferably used. By potting with the filler in this way, space is eliminated, the surface of the rectangular battery cell 1 is protected, and conduction and corrosion due to condensation can be avoided. In addition, it is preferable to make the inside of the covering case 16 have a reduced pressure or a negative pressure when filling the filler so as to spread the filler in the gap and avoid the generation of bubbles. Or conversely, the filler can be injected under pressure. After filling the filler, it is dried until the filler is completely cured. Moreover, the adhesiveness after hardening of a filler can also be improved by making a coating case into resin and making a filler into resin of the same system as a coating case.
(Waterproof sheet 19)

On the other hand, since the covering case 16 has an open bottom, the battery stack 5 cannot be covered with this portion. Therefore, a waterproof sheet 19 that covers the opening surface is provided. As shown in the perspective view of FIG. 4, the waterproof sheet 19 is disposed so as to cover the bottom surface of the battery stack 5, and is fixed to the battery stack 5 in this state. For fixing the waterproof sheet 19, for example, an adhesive is applied to the interface between the waterproof sheet 19 and the battery stack 5. Further, it can be fixed by the overhanging portion 16 b of the covering case 16. In particular, when the filling layer 18 is filled and fixed in the gap between the battery stack 5 and the covering case 16, the waterproof sheet 19 can also be fixed. By doing in this way, in addition to being able to fix the edge of waterproof sheet 19 to battery layered product 5 or covering case 16 surely by hardening of filling layer 18 filled in the gap, waterproof sheet 19 and covering case 16 A waterproof structure capable of blocking water from this portion can be realized.

As the waterproof sheet 19, a resin-made sheet having excellent waterproof properties can be used. For example, PET, PEV, PP, or the like can be used. Moreover, since the battery laminated body 5 is radiated by the cooling plate 61 through the waterproof sheet, it is preferable to use a member having excellent heat conduction. In addition, it is necessary to insulate the battery cells constituting the battery stack 5, and it is necessary that the material has an excellent insulating property. Furthermore, it is preferable that the battery cell is also excellent in heat resistance so that the battery cell is not easily damaged even if it generates heat. As the waterproof sheet 19 having such characteristics, an acrylic material or the like can be suitably used.
(Example 2)

Further, a part of the waterproof sheet 19 can be removed so that the heat conductive sheet 12 is brought into direct contact with the battery stack 5. Such an example is shown in FIG. The battery laminate 5 shown in this figure has the waterproof sheet 19 covering the bottom surface of the battery laminate 5 removed from the state shown in FIG. 11 after the filler is cured. Since the bottom surface of the battery stack 5 is exposed at the portion where the waterproof sheet 19 has been removed, the heat conductive sheet 12 is pressed against this surface, and the battery stack 5 and the heat conductive sheet 12 are directly adhered to each other. It can be expected that resistance is reduced and heat dissipation by the cooling plate 61 is improved. Further, since the surface of the battery stack 5 is already sealed except for the exposed portion if the filler is cured, if the exposed portion can be completely covered with the heat conductive sheet 12, the waterproof structure can be maintained. . For this reason, the removal of the waterproof sheet 19 is preferably made smaller than the area of the heat conductive sheet 12. Further, the waterproof sheet 19b remaining without being removed can maintain airtightness at the overhanging portion 16b. Thereby, the region where the waterproof sheet 19 is removed and the bottom surface of the battery stack 5 is exposed can be completely covered with the heat conductive sheet 12.
(Filling material)

Here, the procedure for filling the filler will be described based on the sectional views of FIGS. As shown in this figure, a waterproof sheet 19 is disposed in the opening on the bottom surface of the battery stack 5 with the cover case 16 covering the periphery. Here, the waterproof sheet 19 is supported using a jig JG for fixing the waterproof sheet. The jig JG has a size substantially the same as or slightly smaller than the opening, and presses the waterproof sheet 19 against the bottom surface of the battery stack 5 through the opening.

充填 Fill the gap between the surface of the battery stack 5 and the inner surface of the covering case 16 with the waterproof sheet 19 pressed by the jig JG. The filler is injected from, for example, a filler inlet that is previously opened in the covering case 16. Then, after the filler is cured, the jig JG is removed and the opening is opened. In this state, the filling layer 18 formed by the hardening of the filler can eliminate a gap between the outer surface of the battery stack 5 and the inner surface of the covering case 16. Further, from this state, as shown in FIG. 11, the cooling plate 61 is placed in the battery stack 5 so that the heat conduction sheet 12 is inserted into the opening and the bottom surface of the heat conduction sheet 12 is pressed by the cooling plate 61. Secure to. Thereby, the cooling plate 61 can be in a heat conduction state on the bottom surface of the battery stack 5 via the heat conductive sheet 12 and the waterproof sheet 19, and the battery stack 5 can be cooled by performing heat exchange on this surface. In addition, as described above, the waterproof sheet 19 may be partially removed before disposing the heat conductive sheet 12 as necessary.

In the above example, the bottom surface of the covering case 16 is opened to thermally couple with the cooling plate 61 at the bottom surface of the battery stack 5. However, the present invention is not limited to this configuration, and for example, the side surface or top surface of the battery stack can be opened, and thermal coupling with the cooling plate can be achieved at this portion. In addition, since the electrode terminal of a battery cell is generally provided in the top | upper surface of a battery cell, Preferably a cooling plate is arrange | positioned in the surface different from the surface which provided the electrode terminal, and a thermal coupling is aimed at.
(Linked structure)

On the other hand, the battery stack 5 and the cooling plate 61 have a connection structure for fixing the battery stack 5 on the cooling plate 61. In the example shown in FIGS. 2 to 5, the connection structure includes a fastening connection 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 connection portion provided on the cooling plate 61 side. Composed. A plurality of fastening connecting portions 44 are provided apart from each other. In the example of FIG. 2, the lower end of the main body portion 41 is provided at three locations on both sides and in the middle.
(Locking piece)

In the example shown in FIGS. 3 to 4, the fastening connecting portion 44 is a locking piece having a tip formed in a hook shape. This locking piece has a hook-like protruding direction that is outward from the battery stack 5.
(Plate connecting part)

On the other hand, on the cooling plate 61 side, a plate connecting portion is provided as a connecting mechanism for connecting to the fastening connecting portion 44. The plate connecting portion is provided at a position corresponding to the position where the fastening connecting portion 44 is provided. As such a plate connecting portion, in the example of FIG. 5, a connecting bar 50 in which a locking hole 51 capable of locking a locking piece is formed is used. The fastening member 4 can be easily fixed to the cooling plate 61 by inserting a hook-like locking piece into the locking hole 51 and locking it.
(Connection bar 50)

As shown in the exploded perspective view of FIG. 5, the connecting bar 50 has a shape in which the strip strip is bent in a substantially U shape in a sectional view. The strip strip is made of a metal plate so as to exhibit sufficient strength. In the example of FIG. 5, the strength is improved by forming a step on the surface of the strip strip. The length of the connecting bar 50 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 on the end face of the connecting bar 50 as a plate connecting portion. In this manner, the plate connecting portion can be easily added to the cooling plate 61 by using the connecting bar 50. In particular, a coupling mechanism can be added without complicating the shape of the cooling plate 61 having a refrigerant circulation function or the like.
(Refrigerant circulation mechanism)

The cooling plate 61 is provided with a refrigerant circulation mechanism therein. FIG. 12 shows an example of such a refrigerant circulation mechanism. In the battery pack 10 shown in FIG. 12, a battery stack 5 in which a plurality of rectangular battery cells 1 are stacked is arranged on the upper surface of a cooling plate 61. The cooling plate 61 is disposed in a thermally coupled state to the rectangular battery cells 1 constituting the battery stack 5. The cooling plate 61 is provided with a refrigerant pipe, and the refrigerant pipe is connected to a cooling mechanism 69. The assembled battery 10 can be effectively cooled directly by bringing the battery stack 5 into contact with the cooling plate 61. Further, not only the battery stack, but also, for example, each member disposed on the end face of the battery stack can be cooled together. In this way, the cooling plate 61 containing the cooling pipe 60 that circulates the refrigerant therein is brought into contact with the coating case 16 to cool it, thereby improving heat dissipation and allowing the power supply device to be used stably even at high output. And can.
(Cooling plate 61)

The cooling plate 61 is a heat radiating body for conducting heat of the rectangular battery cell 1 to dissipate it to the outside. In the example of FIG. The cooling plate 61 incorporates a cooling pipe 60 that is a refrigerant pipe made of copper, aluminum, or the like that circulates a liquefied refrigerant that is a cooling liquid as a heat exchanger. The cooling pipe 60 is thermally coupled to the upper surface plate of the cooling plate 61, and a heat insulating material is disposed between the cooling plate 60 and the bottom plate to insulate the space from the bottom plate. Further, in addition to the cooling function by such a refrigerant, the cooling plate 61 can be composed of only a metal plate. 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.

The cooling plate 61 is cooled by supplying the coolant from the cooling mechanism 69 to the refrigerant piping provided inside. The cooling plate 61 can cool the cooling liquid supplied from the cooling mechanism 69 more efficiently as a refrigerant that cools the cooling plate 61 with heat of vaporization that evaporates inside the refrigerant pipe.

In the example of FIG. 12, two battery stacks 5 are placed on each cooling plate 61. As described above, two battery stacks 5 are connected in the length direction, that is, the stacking direction of the rectangular battery cells 1 to form one battery stack continuous body 10B, and the two batteries in such a connected state are formed. The stacked body 5 is supported by one cooling plate 61. Two of these battery stack continuous bodies 10B are arranged in parallel to constitute the assembled battery 10.

In the example of FIG. 12, the cooling plate 61 is extended in the stacking direction of the prismatic battery cells 1, and the cooling pipe 60 piped therein is meandered so as to be folded back at the edge, thereby forming three straight lines. A cooling pipe 60 is disposed on the lower surface of the battery stack 5. And the circulation path of a refrigerant | coolant is made common by connecting the cooling pipes 60 with battery lamination | stacking continuous bodies 10B. Thus, if it is set as the structure which mounts and cools the several battery laminated body 5 on the one cooling plate 61, a cooling mechanism can be shared and the cooling plate 61 is made common and cheaper and simplified cooling. The mechanism can be realized. However, a plurality of cooling pipes can be arranged on the lower surface of the battery stack. 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.

Furthermore, the cooling plate 61 also functions as a soaking means for equalizing the temperatures of the plurality of rectangular battery cells 1. That is, by adjusting the thermal energy absorbed by the cooling plate 61 from the rectangular battery cell 1, the rectangular battery cell whose temperature is increased, for example, the rectangular battery cell in the central portion is efficiently cooled, and the temperature is decreased, for example, both ends The cooling of the rectangular battery cells is reduced, and the temperature difference between the rectangular battery cells is reduced. As a result, the temperature unevenness of the prismatic battery cells can be reduced, and a situation in which some of the prismatic battery cells are deteriorated and overcharge and overdischarge can be avoided.

In addition, although the example which arrange | positions the cooling plate 61 in the bottom face of the battery laminated body 5 was shown in FIG. 12, it is not restricted to this structure. For example, the cooling plates can be arranged on both side surfaces of the prismatic battery cell, or can be arranged only on the side surfaces.
(Cooling pipe 60)

Furthermore, the cooling pipe 60 through which the internal refrigerant passes can be directly disposed on the lower surface of the battery stack 5 without using a metal plate such as a cooling plate. That is, as shown in the schematic cross-sectional view of FIG. 13, a plurality of rows of cooling pipes 60 are arranged on the lower surface of the covering case 16 that houses the battery stack 5, and the heat insulating member 14 is arranged between the cooling pipes 60. . In this way, the air pipe is eliminated around the cooling pipe 60 and is insulated by covering with the heat insulating member, so that the cooling pipe 60 can be efficiently cooled. In addition, as a result of realizing high-efficiency cooling in this way, there is no need to lay a large number of cooling pipes on the bottom surface of the battery stack as in the prior art, and sufficient cooling is possible even with a small number of rows such as two or three rows The effect is obtained, and the cooling mechanism is simplified and the power supply device is reduced in weight. Furthermore, with this method, the cooling pipe for flowing the coolant can be directly applied to the battery stack 5 without interposing a metal plate such as a cooling plate, so that in this respect as well, the thickness, weight, and size can be reduced. It is done.

As shown in FIG. 13, the cooling pipe 60 is formed in a flat shape having a flat surface facing the battery stack 5. By doing in this way, compared with a cylindrical cooling pipe, the contact area with the square battery cell 1 can be increased, and the thermal coupling with the battery laminated body 5 can be realized reliably. The cooling pipe 60 is made of a material excellent in 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 stack 5 to improve the adhesion, and high thermal conductivity can be realized.
(Insulation member 14)

Further, in the power supply device of FIG. 13, the heat insulating member 14 is disposed in the gap between the cooling pipes 60. The heat insulating member 14 can be a heat insulating resin. For example, urethane resin can be suitably used. Here, as shown in FIG. 13, the periphery of the cooling pipe 60 is covered with a heat insulating resin by potting. By doing so, the cooling pipe 60 and the bottom surface of the battery stack 5 can be reliably covered by potting to prevent the occurrence of condensation and enhance safety.

In the example of FIG. 13, a heat insulating member is provided in the gap between the cooling pipes 60 or the lower surface of the cooling pipe 60 in a state where the cooling pipe 60 is in contact with the bottom surface of the battery stack 5 via the heat conductive sheet 12. 14 is filled and coated. However, if the upper surface of the cooling pipe 60 is also filled with the heat insulating member 14, the upper surface of the cooling pipe 60 can be insulated, and the heat conductive sheet provided between the prismatic battery cells 1 can be dispensed with.

In the example of FIG. 13, an example has been described in which the cover case 16 is a box type with an open lower surface and a closed upper surface. However, the cover case has an open upper surface and a closed lower surface as described above. A bottom box type can also be used. The cooling plate may be a uniform metal plate, or may be insert-molded so that one or a plurality of strip-shaped metal plates are partially embedded. In this case, as shown in the cross-sectional view of FIG. 14, the cooling plate is configured such that the metal plate 21c is disposed at a position corresponding to the cooling pipe 60, thereby improving the thermal coupling with the cooling pipe 60. Can do.

Thus, the power supply device 100 according to the first embodiment seals the battery stack 5 to have a waterproof structure, and protects the prismatic battery cell 1 from condensation and the like. In this configuration, the inner space can be defined by the covering case 16 and the end plate 3, and the filling layer 18 can be disposed and sealed by potting or the like. Moreover, since the end plate 3 is located outside, there is an advantage that it can be easily fixed to an exterior case, a frame, or the like. Furthermore, since the fastening member 4 is located outside the covering case 16, there is also an advantage that the fixing structure for fixing the cooling plate 61 can be reduced in size.

It should be noted that the battery stack can be fastened by fixing the end plate 3 to the covering case by providing the covering case with a sufficient strength such as being made of metal. If it is this structure, since a coating | coated case can serve as a fastening member, further size reduction is achieved.

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 for hybrid vehicles)

FIG. 15 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. 16 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 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 device 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 prismatic 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.

The load LD driven by the power supply device 100 is connected to the power supply device 100 via the 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, it is connected to the host device HT according to 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 ... Square battery cell 2 ... Separator 3 ... End plate; 3b ... Packing 4 ... Fastening member 5 ... Battery laminated body 6 ... Bus bar 10 ... Assembly battery 10B ... Battery laminated continuous body 12 ... Thermal conductive sheet 14 ...

Thermal insulation Member

16, 16B ... Covering case 16b ... Overhang part 18 ... Filling

layer

19, 19b ... Waterproof sheet 21c ...

Metal plate

24, 24B ... Cover part 26 ... Gas duct 41 ... Main part 42 ... Bent piece 43 ... Upper surface holding part 44 ... fastening connection part 50 ... connection bar 51 ... locking hole 60 ... cooling pipe 61 ... cooling plate 69 ... cooling mechanism 70 ... outer case 71 ... lower case 72 ... upper case 73 ... end face plate 74 ... collar part 81 ... battery pack 82 ... Battery unit 84 ... Power supply controller 85 ... Parallel connection switch 93 ... Motor 94 ... Generator 95 ... DC / AC inverter 96 ... Engine 01 ... Battery cell 205 ... Battery stack 260 ... Cooling pipe 261 ... Cooling plate 269 ... Cooling mechanism JG ... Jig EV, HV ... Vehicle LD ... Load; CP ... Charging power source; DS ... Discharge switch; CS ... Charge switch OL ... Output line; HT ... Host equipment DI ... Pack input / output terminal; DA ... Pack abnormal output terminal; DO ... Pack connection terminal

Claims

A battery laminate (5) formed by laminating a plurality of rectangular battery cells (1);
A coating case (16) for covering the outside of the battery stack (5), leaving a part of one surface of the battery stack (5);
A cooling plate (61) disposed in one surface of the battery stack (5) in a heat-coupled state and for exchanging heat with the battery stack (5) by flowing a refrigerant therein;
A power supply device comprising:
The power supply device further includes a waterproof sheet (19) covering one surface of the battery stack (5),
Interposing a filling layer (18) formed by injecting a filler into the gap between the battery laminate (5) and the covering case (16),
A power supply device, wherein the waterproof sheet (19) is fixed by the filling layer (18).
The power supply device according to claim 1,
The covering case (16) has a pair of projecting portions (16b) formed so as to project from both sides with respect to one surface of the battery stack (5),
The power supply apparatus, wherein the waterproof sheet (19) is gripped by the pair of overhang portions (16b).
The power supply device according to claim 2, further comprising:
The power supply device, wherein the waterproof sheet (19) is fixed to the projecting portion (16b).
The power supply device according to claim 2, further comprising:
Provided between the cooling plate and the battery stack (5), comprising a heat conductive sheet (12) having insulation and thermal conductivity,
The power supply device, wherein the heat conductive sheet (12) further has elasticity.
The power supply device according to any one of claims 2 to 4,
The covering case (16) forms an opening that opens a region sandwiched between the pair of overhang portions (16b),
The power supply device according to claim 1, wherein the cooling plate (61) is formed to have a size capable of closing the opening.
The power supply device according to any one of claims 1 to 4,
One surface of the said battery laminated body (5) is a bottom face of a battery laminated body (5), The power supply device characterized by the above-mentioned.
The power supply device according to any one of claims 1 to 6,
The covering case (16) is made of resin,
The power supply device according to claim 1, wherein the filler is made of the same type of resin as the covering case (16).
The power supply device according to any one of claims 1 to 7,
The power supply device, wherein the filler is urethane resin.
The power supply device according to any one of claims 1 to 8,
A power supply device, wherein a part of the waterproof sheet (19) is removed so that the heat conductive sheet (12) and a part of the battery laminate (5) are in direct contact with each other.
A vehicle comprising the power supply device according to any one of claims 1 to 9.
A battery laminate (5) formed by laminating a plurality of rectangular battery cells (1);
A coating case (16) for covering the outside of the battery stack (5), leaving a part of one surface of the battery stack (5);
A cooling plate (61) disposed in one surface of the battery stack (5) in a heat-coupled state and for exchanging heat with the battery stack (5) by flowing a refrigerant therein;
Interposed between the cooling plate and the battery stack (5), having heat insulation and insulation, and a heat conduction sheet (12) having elasticity,
A method of manufacturing a power supply device comprising:
The outside of the battery stack (5),
One surface of the battery laminate (5) is covered with a waterproof sheet (19),
The other surface of the battery laminate (5) is covered with a covering case (16),
The waterproof sheet (19) is exposed from the covering case (16) while covering the periphery of the waterproof sheet (19) with the covering case (16) on the surface covered with the waterproof sheet (19). A step of arranging a jig (JG) so as to press the waterproof sheet (19) against the battery laminate (5) in the opened opening,
A step of injecting a filler into a gap between the battery laminate (5) and the covering case (16) to form a filling layer (18);
A step of removing the jig (JG) after curing of the filling layer (18);
A method of manufacturing a power supply device comprising the step of disposing the heat conductive sheet (12) and the cooling plate (61) in the opening.
It is a manufacturing method of the power supply device according to claim 11,
Before placing the heat conductive sheet (12), including a step of removing a portion of the waterproof sheet (19) that is not fixed by the filling layer (18), .