WO2012133711A1

WO2012133711A1 - Method for producing power source device, power source device, and vehicle provided with power source device

Info

Publication number: WO2012133711A1
Application number: PCT/JP2012/058485
Authority: WO
Inventors: 康広浅井; 高志瀬戸; 橋本　裕之; 土屋　正樹; 貴英籠谷
Original assignee: 三洋電機株式会社
Priority date: 2011-03-31
Filing date: 2012-03-29
Publication date: 2012-10-04

Abstract

The present invention reduces the size and weight of a power source device and enables stacked square battery cells to be inserted into a cover case without using a binding bar. A method for producing a power source device, the method involving: a step for sandwiching both end surfaces of stacked square battery cells (1) by means of a first binding tool (BJ1), a second binding tool (BJ2) and a third binding tool (BJ3) arranged from the bottom in said order in the height direction; a step for positioning a battery stack (5) on the upper surface opening of a cover case (16) while sandwiching the battery stack (5) by means of the first binding tool (BJ1), the second binding tool (BJ2) and the third binding tool (BJ3), and for lowering the battery stack (5) by releasing the first binding tool (BJ1), and inserting the battery stack (5) into the opening of the cover case (16) from the bottom end of the battery stack (5); a step for lowering the battery stack (5) even further by releasing the second binding tool (BJ2) and for continually inserting the battery stack (5) into the cover case (16); and a step for releasing the third binding tool (BJ3), pressing the upper surface of the battery stack (5) with an upper surface pressing tool (PJ1), and for press fitting the battery stack (5) into the cover case (16).

Description

Manufacturing method of power supply device, power supply device, and vehicle including power supply device

The present invention mainly relates to 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, a manufacturing method thereof, and such a method. The present invention relates to a vehicle including 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, 2, and 3). In such a battery system, for example, as shown in FIGS. 20 and 21, a cooling pipe 260 that circulates a refrigerant is disposed 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. 20, the cooling pipe 260 extends and extends in the direction intersecting the stacking direction in which the battery cells 201 are stacked. In the example of FIG. 21, the cooling pipe 260 is extended in parallel with the stacking direction in which the battery cells 201 are stacked. Further, in the example of FIG. 22, 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, thereby removing heat from the battery stack 205 via the cooling plate 261 and cooling. I am letting.

In these cooling methods, it is possible to take the heat of the battery cells more efficiently by heat exchange using a refrigerant, compared to an air-cooled cooling method in which cooling air is blown into the gap between adjacent battery cells, As a result of the relatively low temperature of the cooling part due to 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.

JP 2009-134901 A JP 2009-134936 A JP 2010-15788 A Japanese Utility Model Publication No. 34-16929

In order to prevent condensation on the battery cell surface, it is conceivable to surround the battery cell with a case or the like and waterproof it so that water droplets do not enter from the outside. Moreover, it can be said that it is beneficial to cover and protect the battery cell with a case or the like from the viewpoint of protecting the battery cell from external force or the like. Therefore, it is conceivable to store a battery stack in which battery cells are stacked in a covering case.

On the other hand, in a structure in which a plurality of battery cells are stacked to form a battery stack, a fastener such as a metal bind bar is used to fasten the stacked battery cells. Since the bind bar is arranged on the side surface of the battery stack, in the configuration in which the battery stack is surrounded by a cover case or the like, the cover case is covered from above the bind bar. There was a problem of getting bigger. In particular, power supply devices for in-vehicle use are required to be as small and light as possible because of installation space.

On the other hand, if the binding bar is to be eliminated, the battery cell cannot be fastened, and the battery stack cannot be inserted into the covering case.

The present invention has been made to solve such problems. A main object of the present invention is to provide a method of manufacturing a power supply device that can be inserted into a covering case in a state where battery cells are stacked without using a bind bar, a power supply device, and a vehicle including the power supply device. .

Means for Solving the Problems and Effects of the Invention

In order to achieve the above object, according to the method for manufacturing a power supply device according to the first aspect of the present invention, a battery stack formed by stacking a plurality of prismatic battery cells having a rectangular outer shape, And a covering case having an opening on one side for housing the battery stack, wherein the end faces on both sides of the battery stack are bound to one or more in a state where the rectangular battery cells are stacked. In the state of pressing and clamping with a jig, and in the state of being clamped with the one or more binding jigs, the battery stack is positioned in an opening portion opened on one surface of the covering case, and the single or plural A step of inserting the battery stack from the opening of the covering case while releasing the pressing of the binding jig. As a result, the battery stack can be pushed into the covering case in a stacked state without using a bind bar.

Further, according to the method for manufacturing the power supply device according to the second aspect, the one or more binding jigs are arranged in order from the bottom in the height direction, the first binding jig, the second binding jig, and the third binding jig. A step of inserting from the opening of the covering case, the battery stack in the state of being sandwiched between the first binding jig, the second binding jig, and the third binding jig, Positioning the upper surface opening of the covering case, releasing the pressing of the first binding jig, lowering the battery stack, and inserting the battery stack from the lower end into the opening of the covering case; and Releasing the pressing of the second binding jig, further lowering the battery stack, and pushing the insertion into the covering case; and further releasing the pressing of the third binding jig; Body from top to top Pressed at write jig, the battery stack may include a step of press-fitting into the cover case. As a result, the battery stack can be pushed into the covering case in a stacked state without using a bind bar.

Furthermore, according to the method of manufacturing the power supply device according to the third aspect, an end plate can be disposed on the end surface of the battery stack. As a result, the battery stack is sandwiched through the end plate, and can be safely pressed without damaging the prismatic battery cells located on the end face with an external force.

Furthermore, according to the method for manufacturing the power supply device according to the fourth aspect, the upper surface pressing jig can press the upper surface of the end plate when the battery stack is press-fitted from the upper surface. As a result, even when pressing from the upper surface of the battery stack, by receiving an external force from the end plate, it is possible to reduce the load on the rectangular battery cell and to push it into the covering case with high reliability.

Furthermore, according to the method of manufacturing the power supply device according to the fifth aspect, the covering case has a frame shape opened in the vertical direction, and when the battery stack is press-fitted into the covering case, from the lower opening end. The opening portion of the end face plate of the covering case can be expanded with an expansion jig. Thereby, in the step of press-fitting the battery stack, the first binding jig and the second binding jig are released and the covering case side is expanded with respect to the battery stack that is about to spread in the stacking direction. There is an advantage that the load during press-fitting can be reduced.

Furthermore, according to the method for manufacturing the power supply device according to the sixth aspect, a battery stack formed by stacking a plurality of prismatic battery cells having a rectangular outer shape, and one surface for storing the battery stack are opened. A method of manufacturing a power supply device comprising: a covering case; and a step of inserting both end faces between a pair of rotatable rotating roller jigs in a state where the rectangular battery cells are stacked, and the battery stacking With the body inserted between the rotating roller jigs and being sandwiched between them, the pair of roller jigs are placed on each other so that the battery stack is inserted into the covering case by being positioned at one surface opening of the covering case. A step of rotating the battery stack in the opposite direction and inserting the battery stack from one end face into the opening of the covering case while maintaining the battery stack in a pressed state. Accordingly, the battery stack can be sandwiched and inserted at the same time using one jig, and the battery stack can be press-fitted into the covering case more easily and without using a fastener such as a bind bar. .

Furthermore, according to the method for manufacturing the power supply device according to the seventh aspect, the covering case has an open top surface that houses the battery stack, and the battery stack is positioned at the top opening of the covering case. And rotating the pair of roller jigs in opposite directions so as to lower the battery stack, lowering the battery stack while maintaining the pressed state, and lowering the battery stack from the lower end, It can be inserted into the opening of the covering case. Accordingly, the battery stack can be pressed and lowered simultaneously using a single jig, and the battery stack can be more easily and quickly pressed into the covering case without using a fastener such as a bind bar. .

Furthermore, according to the power supply device according to the eighth aspect, a battery stack formed by stacking a plurality of prismatic battery cells having a rectangular outer shape, and a covering case having an open upper surface for storing the battery stack. The battery stack is press-fitted into the covering case without a fastener for fastening in the stacked state. Thereby, the advantage which can reduce an external shape by not using fasteners, such as a bind bar, as a power supply device press-fit in the covering case in the lamination | stacking state by a battery laminated body is acquired.

Furthermore, according to the power supply device according to the ninth aspect, a battery stack formed by stacking a plurality of prismatic battery cells having a rectangular outer shape, and a covering case having an open upper surface for storing the battery stack. , And the battery laminate is housed in the covering case, and pressure is applied in the stacking direction of the rectangular battery cells.

Furthermore, the above power supply device can be used for a vehicle including the power supply device according to the tenth aspect.

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 a disassembled perspective view which shows the battery laminated body of FIG. It is a disassembled perspective view of the battery laminated body of FIG. It is a disassembled perspective view of the battery laminated body of FIG. It is a schematic cross section which shows the example which arrange | positions a water absorbing sheet to a battery laminated body. It is a schematic plan view which shows the arrangement state of a cooling pipe and a cooling mechanism. FIG. 3 is a schematic vertical sectional view showing a method for press-fitting a battery stack according to Example 1 into a covering case. FIG. 10 is a schematic vertical sectional view showing a state in which the battery stack is inserted by releasing the pressing of the first binding jig in the state of FIG. 9. FIG. 11 is a schematic vertical sectional view showing a state in which the battery stack is pushed in by releasing the pressing of the second binding jig from the state of FIG. 10. FIG. 12 is a schematic vertical sectional view showing a state in which the battery stack is further pushed from the state of FIG. 11 and the pressing of the third binding jig is released. FIG. 13 is a schematic vertical sectional view showing a state in which the battery stack is further pushed in from the state of FIG. 12. FIG. 14 is a schematic vertical sectional view showing a state in which the cover portion is fixed in the state of FIG. 13. 4 is a flowchart illustrating a method for press-fitting a battery stack according to Example 1 into a covering case. FIG. 6 is a schematic vertical sectional view showing a method for press-fitting a battery laminate according to Example 2 into a covering case. 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. 6 is a schematic vertical sectional view showing a method for press-fitting a battery laminate according to Example 3 into a covering case. FIG. It is a schematic plan view which shows another cooling mechanism. It is a schematic plan view which shows another cooling mechanism.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the embodiment described below exemplifies a method of manufacturing a power supply device, a power supply device, and a vehicle including the power supply device for embodying the technical idea of the present invention. The method, the power supply device, and the vehicle equipped with the power supply device 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's 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 5 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 an exploded perspective view of the battery stack 5 of FIG. 2, and FIG. 5 is an exploded perspective view of the battery stack 5 of FIG. 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 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 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.

A perspective view of each battery stack 5 constituting the assembled battery 10 is shown in FIG. As shown in FIG. 4, the battery stack 5 includes a plurality of prismatic battery cells 1, a separator 2 that interposes a plurality of prismatic battery cells 1 on the surface where the plurality of prismatic battery cells 1 are stacked, and a battery 2. A pair of end plates 3 disposed on an end surface in the stacking direction of the stacked body 5 and a covering case 16 that houses a battery stacked body 5 in which a plurality of rectangular battery cells 1 and separators 2 are stacked alternately are provided.
(Battery laminate 5)

As shown in FIG. 5, the battery stack 5 is formed by stacking a plurality of rectangular battery cells 1 via an insulating separator 2. Further, as shown in FIG. 4, a pair of end plates 3 are arranged on both end faces of the battery stack 5. 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.

Each battery stack 5 is covered with a covering case 16. Further, as shown in FIG. 3, the covering case 16 is fixed on a cooling plate 61 for cooling it. A connection structure for fixing the battery stack 5 on the cooling plate 61 is provided.
(Square battery cell 1)

In the rectangular battery cell 1, the outer can constituting the outer shape is 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 also connect adjacent square battery cells in parallel, or a combination of series and parallel. 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)

The separator 2 is a spacer for laminating 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.
(End plate 3)

As shown in FIG. 4, a pair of end plates 3 are arranged on both end faces of the battery stack 5 in which the prismatic battery cells 1 and the separators 2 are alternately stacked, and the battery stack 5 is formed by the pair of end plates 3. It is pinched. The end plate 3 is made of a material that exhibits sufficient strength, for example, metal. The end plate 3 has a fixing structure for fixing to the lower case 71 shown in FIG. The end plate can be manufactured from a resin material, or can be manufactured by reinforcing an end plate made of resin with a metal member.
(Coating case 16)

The battery stack 5 is press-fitted into the covering case 16 as shown in FIG. Here, the battery cell 1 is inserted into the covering case 16 while keeping the battery cell 1 in a laminated state, that is, in a state where the battery laminated body 5 is constrained to have a certain thickness or less in the lamination direction. In the first embodiment, the covering case 16 is formed in a bottomed box shape having an open upper surface, as shown in the exploded perspective view of FIG. The covering case 16 is made of metal to enhance heat dissipation and to enhance heat conduction at the joint surface with the cooling plate 61. On the other hand, the inner surface of the covering case 16 is insulated to insulate the stacked rectangular battery cells 1. Further, if necessary, the heat conductive sheet 12 having insulating properties and heat conductivity can be arranged on the bottom surface of the covering case 16. By covering the battery stack 5 with the covering case 16 in this way, a sealed structure is realized. In this example, the covering case is made of metal, but may be made of resin or the like if sufficient strength can be maintained. Moreover, thermal conductivity can also be improved by insert-forming a metal plate in the resin-made covering case. Moreover, a fiber sheet, a mica sheet, etc. can be utilized suitably for resin.
(Waterproof structure)

The battery stack 5 is waterproofed by a covering case 16. Thereby, the penetration | invasion of the water | moisture content from the outside is blocked | prevented and unintentional conduction | electrical_connection and corrosion can be avoided. On the other hand, it is necessary 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, cooling can be performed more efficiently, but the cooling part is kept at a relatively low temperature for high cooling performance. As a result, the temperature may drop below the dew point, and moisture in the air present around the battery stack may be cooled and condensed on the surface of the prismatic battery cell. Therefore, the cover case is not simply made waterproof, but has a waterproof structure for protecting the surface of the battery stack surrounded by the cover case from such water droplets.
(Buffer member 18)

In order to realize such a waterproof structure of the battery stack 5, a buffer member 18 is disposed between the battery stack 5 and the covering case 16 as shown in the cross-sectional view of FIG. 7. That is, the buffer member 18 is filled in the gap between the battery stack 5 and the covering case 16, and the situation in which moisture in the air existing in the gap is condensed to adversely affect the battery stack 5 is avoided. .

In the example of Example 1, the periphery of the battery stack 5 is covered with a resin as the buffer member 18. Here, in order to hold the resin on the surface of the battery stack 5, the resin is injected between the battery stack 5 and the covering case 16 by surrounding the battery stack 5 with the covering case 16. This eliminates the gap between the battery stack 5 and the covering case 16, thereby avoiding a situation where the surface of the battery stack 5 is dewed and adversely affected. In Example 1, in order to realize a waterproof structure with the end plate 3 and the covering case 16, a filler as a buffer member 18 is filled in a gap between the battery stack 5 within a region surrounded by the covering case 16. Yes. As a result, a waterproof structure is obtained in which the periphery of the battery stack 5 is waterproof as shown in FIG.
(Filler)

Urethane resin can be suitably used as the filler. By potting with the filler as described above, gaps are 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 resin can be injected under pressure. After filling the resin, it is dried until the resin is completely cured.
(Water absorption sheet)

Alternatively, a water absorbing sheet can be used as the buffer member 18. The water-absorbing sheet is a sheet material having a hygroscopic property and a water-absorbing property composed of a polymer material or the like, and thus, condensation can be avoided at a low cost with a simple configuration without obtaining a complicated process such as potting. The buffer member 18 is not limited to this, and a structure such as a packing structure, an O-ring, a sealing structure using a gasket, a sheet-like elastic member or other potting material, or a battery stack can be used as appropriate. .
(Cover 24)

After filling with the filler, the upper surface is closed with the cover 24 as shown in FIG. Here, it is fixed to the upper surface of the covering case 16 via packing or the like. 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. Moreover, the bus bar 6 can also be insert-molded in the cover part 24, and by joining the cover part 24 to the top surface of the battery stack 5, the electrode terminals of the respective rectangular battery cells 1 can be connected together. It becomes possible. 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 this way, the battery stack 5 is accommodated in the covering case 16. The covering case 16 can also seal a fitting part airtightly, using the member which comprises 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.
(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 illustrated in FIG. 3, the connection structure includes a connection bar 50 </ b> B. The connecting bar 50B is a U-shaped metal plate that extends in the vertical direction on the side surface of the cover portion 24, and is locked to the upper surface of the covering case 16 and to the bottom surface of the cooling plate 61, It is fixed by screwing. The cooling plate 61 is fixed to the bottom surface of the covering case 16 by the connecting bar 50B.
(Connection bar 50B)

As shown in the exploded perspective view of FIG. 3, the connecting bar 50 </ b> B 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, for example, a metal plate so as to exhibit sufficient strength. Preferably, the strength is improved by forming a step on the surface of the strip. The length of the connecting bar 50 </ b> B is a substantially U-shaped bent portion that is large enough to sandwich the height of the cover portion 24 on the top surface of the covering case 16 and the cooling plate 61 on the bottom surface. In this manner, the plate connecting portion can be easily added to the cooling plate 61 by using the connecting bar 50B. 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.
(Cooling mechanism 69)

The cooling plate 61 is connected to a cooling mechanism. The cooling mechanism includes, for example, a refrigerant circulation mechanism. FIG. 8 shows an example of such a refrigerant circulation mechanism. In the battery pack 10 shown in FIG. 8, the battery stack 5 in which a plurality of rectangular battery cells 1 are stacked is disposed on the upper surface of the 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 cooling pipe 60 as a refrigerant pipe through which the refrigerant flows, and the cooling pipe 60 is connected to a cooling mechanism 69. In addition to being able to cool the battery stack 5 directly and effectively by bringing the battery stack 5 into contact with the cooling plate 61, the power supply device can also cool each member such as an electronic circuit disposed on the end face of the battery stack. In this way, the cooling plate 61 including the cooling pipe 60 that circulates the refrigerant therein is brought into contact with the bottom surface of the covering case 16 to be cooled, so that the heat dissipation is improved and the power supply device can be stably supplied even at high output. Can be available.
(Cooling plate 61)

The cooling plate 61 is a heat radiator that conducts 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 61.

In the example of FIG. 8, 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. 8, the cooling plate 61 is extended in the stacking direction of the rectangular battery cells 1, and the cooling pipe 60 piped inside is meandered so as to be folded back at the end 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, and can be divided into, for example, folded portions of the meandering cooling pipe shown in FIG. 8 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. 8, it is not restricted to this structure. For example, the cooling plate can be arranged on both side surfaces of the rectangular battery cell, or can be arranged only on one side surface.

The cooling mechanism 69 shown in FIG. 8 forcibly cools the cooling pipe 60 with the heat of vaporization of the refrigerant. The cooling mechanism 69 includes a circulation pump P and a radiator 54, and a control circuit CT that controls the operation of the fan 53 of the circulation pump P and the radiator 54. The circulation pump P circulates the liquid refrigerant through the refrigerant path and the radiator 54. The control circuit CT detects the temperature of the battery stack 5 with a temperature sensor, and operates the circulation pump P when the detected temperature becomes higher than the set temperature. The control circuit CT detects the temperature of the refrigerant with a temperature sensor, and operates the fan 53 of the radiator 54 when the temperature of the refrigerant becomes higher than a set value. The refrigerant circulated through the refrigerant path by the circulation pump P is insulating oil or antifreeze. Silicon oil or the like can be used as the insulating oil. In this specification, the cooling with the refrigerant is used in the meaning including water cooling in which water or a coolant is circulated.
(Cooling mechanism 69B according to a modification)

Further, the cooling mechanism can supply a refrigerant that is vaporized inside the refrigerant path and cooled by the heat of vaporization to the refrigerant path. A cooling mechanism 69B according to such a modification is shown in FIG. This refrigerant is vaporized inside the refrigerant path to cool the refrigerant path. The cooled refrigerant path cools the battery stack 5 from the bottom surface. The cooling mechanism 69B can cool the battery stack 5 to a low temperature. The cooling mechanism 69B includes a compressor C that pressurizes the vaporized refrigerant, a condenser 57 that cools and liquefies the refrigerant pressurized by the compressor C, and supplies the refrigerant liquefied by the condenser 57 to the refrigerant path. And an inflator 58. The expander 58 is, for example, a capillary tube or an expansion valve. A capillary tube or an expansion valve made of a thin tube is limited to a predetermined flow range of the refrigerant. These expanders 58 are designed to have a flow rate at which all of the refrigerant is vaporized while being discharged from the refrigerant path.

The battery cell 1 can also be cooled by supplying the liquefied refrigerant to the refrigerant flow path, evaporating the refrigerant in the refrigerant flow path, and forcibly cooling with the heat of vaporization of the refrigerant. A cooling mechanism 69B that forcibly cools the cooling plate 61B with the heat of vaporization of the refrigerant supplies the liquefied refrigerant to the cooling pipe 60B via the expansion valve 65, and vaporizes the supplied refrigerant by evaporating inside the cooling pipe 60B. The cooling plate 61B is cooled by heat. The vaporized refrigerant is pressurized by the compressor C, supplied to the condenser 57, liquefied by the condenser 57, and circulated through the expansion valve 65 to the refrigerant flow path of the cooling pipe 60B to cool the cooling plate 61B. To do.
(Cooling mechanism 69C according to a modification)

Note that the cooling pipe is not necessarily cooled by the heat of vaporization of the refrigerant, and for example, water cooling that circulates and cools the cooled liquid can be adopted. Further, the cooling pipe may be provided with a cooling gas passage in the interior, and the cooled gas may be cooled by forcibly blowing the cooled gas. In addition, when employing water cooling in which water or a coolant is circulated, the coolant used in the water cooling may be cooled with a refrigerant. In particular, in a vehicle power supply device, an existing cooling mechanism used for an indoor air conditioner or the like can be used for cooling the coolant. FIG. 25 shows a cooling mechanism 69C employing such a configuration. The cooling mechanism 69C shown in this figure includes a first cooling mechanism 69a that cools the cooling plate 61C with a cooling liquid by water cooling, and a second cooling mechanism 69b for cooling the vehicle interior that uses a refrigerant such as an indoor air conditioner. 67 is connected. In the first cooling mechanism 69a, a pump P, a three-way valve 64, an intermediate heat exchanger 67, a heater 66, and a cooling pipe 60C are arranged in a first circulation path 65 indicated by a thick line. Further, the radiator 54B is also connected through the three-way valve 64. The radiator 54B is air-cooled by outside air, and when the outside air temperature is low, the three-way valve 64 can be switched from the intermediate heat exchanger 67 to the radiator 54B side to suppress energy consumption required for cooling, such as the power of the compressor C. The heater 66 is a member for adjusting the temperature by heating the coolant.

On the other hand, the second cooling mechanism 69b is provided with a compressor C, an intermediate heat exchanger 67, an evaporator 56, and a condenser 57B in a second circulation path 55B indicated by a thin line. The intermediate heat exchanger 67 and the evaporator 56 are connected in parallel via

expansion valves

58C and 58B, respectively. A fan 53B is in close proximity to the condenser 57B. This fan 53B can also be used for heat dissipation of the radiator 54B. In the example of FIG. 25, water containing antifreeze is used as the coolant, and HFC is used as the refrigerant.

Thus, by connecting the first cooling mechanism 69a of the cooling plate 61C to the second cooling mechanism 69b via the intermediate heat exchanger 67, the coolant can be cooled more efficiently using the existing cooling mechanism, There is an advantage that the battery block can be cooled stably.
(Thermal conductive sheet 12)

In addition, a heat transfer member such as the heat conductive sheet 12 is interposed between the cooling plate 61 and the square battery cell 1. The heat conductive sheet 12 is preferably made of an insulating material having excellent heat conductivity, 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, heat conduction can be maintained, electrically insulating between the battery laminated body 5 and the cooling plate 61. FIG. 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.

Further, by giving elasticity to the heat conductive sheet 12, the surface of the heat conductive sheet 12 is elastically deformed, and a space is eliminated at the contact surface between the battery stack 5 and the cooling plate 61, so that the thermal coupling state can be improved satisfactorily.

In this manner, 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 buffer member 18 can be disposed and sealed by potting or the like.
(Press-in method for battery stack)

Next, a method for press-fitting the battery stack 5 into the covering case 16 will be described with reference to schematic vertical sectional views of FIGS. 9 to 14 and a flowchart of FIG. First, in step S1, as shown in FIG. 9, the prismatic battery cells 1 are stacked, and the pair of end plates 3 are disposed on the end faces, and are sandwiched by binding jigs from both end faces. Here, the binding jig is composed of three parts: a first binding jig BJ1, a second binding jig BJ2, and a third binding jig BJ3. The first to third binding jigs BJ1 to BJ3 are arranged in the vertical direction on the end surface of the end plate 3, that is, the back surface side of the surface that presses the battery stack 5. Further, each binding jig is pressed from the end face so that the length of the battery stack 5 can be inserted into the opening of the covering case 16. In other words, the size of the opening of the covering case 16 is set in accordance with the length in the stacking direction of the rectangular battery cells 1 of the battery stack 5 sandwiched with an appropriate pressure. Moreover, it becomes possible to press safely, without damaging a square battery cell by pinching via the end plate arrange | positioned at the end surface of the battery laminated body 5. FIG.

Also, on the upper surface of the battery stack 5, an upper surface pressing jig PJ1 and a second pressing jig PJ2 can be provided. The upper surface pressing jig PJ1 presses the portion of the end plate 3 from the upper surface of the battery stack 5. The second pressing jig PJ2 presses the middle part. Further, the upper surface pressing jig PJ1, the second pressing jig PJ2 arranged on the upper surface, the first binding jig BJ1, the second binding jig BJ2, and the third binding jig BJ3 arranged on the both side surfaces are a jig. The tool control unit CR controls the pressing state, the pressing release state, the pressing force, and the like. The jig control unit CR controls the pressing / releasing operation of each jig at an appropriate timing. For example, as described later, the timing of pressing the upper surface of the battery stack 5 with the upper surface pressing jig PJ1 and the second pressing jig PJ2 is synchronized with the timing when the second binding jig BJ2 and the third binding jig BJ3 are released. In addition, a smooth press-fitting operation can be performed by setting the extrusion amount for each binding jig.

Next, in step S2, the battery stack 5 thus sandwiched is positioned in the upper surface opening of the covering case 16, and the first binding jig BJ1 is released as shown in FIG. Then, the battery stack 5 is inserted into the opening of the covering case 16 from the lower end. In this state, since the battery stack 5 is sandwiched between the second binding jig BJ2 and the third binding jig BJ3, the length of the battery stack 5 is maintained in the pressed state as shown in FIG. 16 can be inserted.

Further, in step S3, the second binding jig BJ2 is released from the state shown in FIG. 11, the battery stack 5 is further lowered, and the battery stack 5 is inserted deeper into the opening of the covering case 16. In this state, as shown in FIG. 12, the battery stack 5 is sandwiched near the upper end by the third binding jig BJ3, while the vicinity of the lower end is in contact with the inner surface of the covering case 16, and resistance due to friction can occur. If necessary, a pressing force for pressing from the upper surface of the battery stack 5 is supplementarily applied by the upper surface pressing jig PJ1. The upper surface pushing jig PJ1 can avoid a situation in which a strong stress is directly applied to the prismatic battery cell 1 by pressing the upper surface of the end plate. On the other hand, when an electrode terminal, a safety valve, or the like is disposed on a surface other than the upper surface of the prismatic battery cell, the upper surface of the battery stack becomes a flat plane, and the prismatic battery cell 1 sandwiched between the pair of end plates is displaced. It is also preferable to provide a second pressing jig PJ2 that presses the upper surface of the prismatic battery cell 1 so that it does not protrude or project in the middle.

Further, in step S4, the third binding jig BJ3 is released from the state of FIG. 12, and the battery stack 5 is pressed from the upper surface by the upper surface pressing jig PJ1, and the battery stack 5 is covered as shown in FIG. Press fit into the case 16. Since the side surface of the battery stack 5 is in contact with the inner surface of the covering case 16 and resistance due to friction may occur, pressing for press-fitting is performed from the upper surface of the battery stack 5 with the upper surface pressing jig PJ1. At this time, the second pressing jig PJ2 also presses from the upper surface of the prismatic battery cell 1. Finally, as shown in FIG. 14, the upper surface of the covering case 16 is closed by the cover portion 24, and the battery stack 5 can be stored in the covering case 16.

Thus, the battery stack 5 press-fitted into the covering case 16 is in a state in which pressure is applied in the stacking direction of the rectangular battery cells 1 as shown in the cross-sectional view of FIG. If it is this structure, fastening members, such as a bind bar for fastening a battery laminated body, can be made unnecessary, and the outer periphery of a battery laminated body can be coat | covered with the covering case 16, and can be protected.

Also, if necessary, a buffer member is disposed in the gap between the covering case and the battery stack, so that condensation on the surface of the battery stack can be prevented. The buffer member can avoid a situation where moisture in the air is condensed by filling the space on the surface of the battery stack with the resin, for example, by injecting resin into the gap. Or an elastic sheet, a water absorption sheet, etc. can also be used as a buffer member.

Furthermore, the covering case can be made waterproof. For example, the battery stack is waterproofed by closing the joint surface between the cover portion covering the upper surface of the cover case and the cover case using packing or an O-ring.

In the above example, the number of binding jigs is three, but it can be four or more. It is also possible to configure with two. Note that a configuration having a plurality of pressing portions with a single binding jig is also included in the plurality of band jigs referred to in this specification.

Furthermore, it is also possible to insert the battery stack from the lower surface of the covering case by inverting the upper and lower sides of the covering case shown in Example 1, opening the lower surface of the covering case. Thus, it is sufficient for the covering case to have at least one open surface so that the battery stack can be inserted.
(Example 2)

In the above method, the battery case was press-fitted from the top opening with the covering case as a bottomed box shape. However, it is also possible to use a cylindrical form in which not only the upper surface but also the lower surface is opened as the covering case. In this case as well, press-fitting can be performed more smoothly by opening the lower surface side of the covering case in addition to press-fitting in the same manner as in the first embodiment. This method will be described as a second embodiment with reference to FIG. Here, the pair of end face plates 16c of the opposing covering case 16B are locked on the lower surface side of the covering case 16B using the expanding jig OJ, and pulled in directions opposite to each other, that is, in the direction of expanding the opening. It is forcibly opened. The press-fitting method of Example 2 can be performed in substantially the same manner as in Example 1. When the battery stack 5 is inserted into the cover case 16B and press-fitted, it is covered from the lower opening end with the expansion jig OJ. The end plate 16c of the case 16B is pulled with the expansion jig OJ so as to expand the opening. By widening the opening end in this manner, particularly in step S4, when the battery stack 5 is pushed from the upper surface, the frictional force between the inner surface of the covering case 16B and the battery stack 5 can be reduced to facilitate press-fitting. .

Moreover, it goes without saying that it is possible to press-fit from the lower surface side of the covering case, contrary to the above. In this case, in order to widen the opening, the opening is spread on the upper surface of the covering case using a spreading jig.
(Example 3)

In the above embodiment, the battery stack 5 is pressed using the binding jig, while the battery stack 5 is press-fitted into the covering case 16 using the upper surface pressing jig. An example of performing the above with individual jigs has been described. However, it is not limited to this method, and clamping and pressing can be performed with a common jig. Such an example will be described as Example 3 based on the schematic vertical sectional view of FIG. In the battery press-fitting device shown in this figure, a pair of rotatable rotating roller jigs RJ are disposed on both end faces of the battery stack 5. The rotating roller jig RJ includes a pair of elliptical or flat rotating bodies that are long in the vertical direction and whose surfaces are covered with an elastic member or the like. The battery stack 5 can be sandwiched from both sides by inserting the battery stack 5 between the pair of rotating roller jigs RJ configured as described above. Further, by rotating the pair of rotating roller jigs RJ in opposite directions, the battery stack 5 can be sent downward while being sandwiched. In other words, the battery stack 5 can be lowered while maintaining the sandwiched posture. For this reason, prior to the rotation of the rotating roller jig RJ, the battery case 5 can be guided into the cover case 16 while maintaining the clamping state by arranging the case 16 below the battery layer 5. With this method, the battery stack 5 can be smoothly lowered while being sandwiched in the lateral direction. Moreover, you may make it press from upper direction together using an upper surface pressing jig etc. as needed.

In addition, the battery stack 5 is sandwiched between the rotating roller jigs RJ that are spaced apart from each other in a state where the rotation is stopped, and the rotating roller jig RJ is moved on the covering case 16 and then rotated. In addition, a pair of rotating roller jigs RJ is fixed in advance above the covering case 16 with a width that allows the battery stack 5 to be sandwiched in advance, and the rotating battery jig RJ is rotated and the battery stack is viewed from above. By feeding 5, the battery stack 5 can be pushed downward and guided into the covering case 16 while being pressed. With this method, there is an advantage that the battery stack 5 can be guided into the covering case 16 in a short time. That is, since the battery stack 5 can be continuously sandwiched and press-fitted, a complicated operation as in the first embodiment is not required, and the battery stack 5 can be smoothly covered with a series of operations using the rotating roller jig RJ. 16 can be press-fitted. In some cases, the battery stack 5 may be inserted into the covering case 16 as it is without forcibly pressing it from above.

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. 17 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. 18 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 FIG. 1 is a motor 93 for running 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. 19, 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 device manufacturing method, a power supply device, and a vehicle including the power supply device according to the present invention include a plug-in hybrid electric vehicle, a hybrid electric vehicle, and an electric vehicle that can switch between an EV traveling mode and an HEV traveling mode. 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 5 ... Battery laminated body 6 ... Bus bar 10 ... Battery assembly 10B ... Battery laminated continuous body 12 ... Thermal

conductive sheet

16, 16B ... Covering case; 16c ... End plate 18 ... Buffer member 24 ... Cover portion 26 ... Gas duct 50B ... Connecting

bars

53, 53B ...

Fans

54, 54B ... Radiator 55B ... Second circulation path 56 ...

Evaporator

57, 57B ... Condenser 58 ... Expander; 58B, 58C ...

expansion valves

60, 60B, 60C ... cooling

pipes

61, 61B, 61C ... cooling plate 64 ... three-way valve 65 ... first circulation path 66 ... heater 67 ...

intermediate heat exchangers

69, 69B, 69C ... cooling mechanism; One cooling mechanism; 69b ... second cooling mechanism 70 ... outer case 71 ... lower case 72 ... upper case 73 ... end face plate 74 ... collar 81 ... battery pack 82 ... electricity Unit 84 ... Power controller 85 ... Parallel connection switch 93 ... Motor 94 ... Generator 95 ... DC / AC inverter 96 ... Engine 201 ... Battery cell 205 ... Battery stack 260 ... Cooling pipe 261 ... Cooling plate 269 ... Cooling mechanism BJ1 ... One binding jig BJ2 ... Second binding jig BJ3 ... Third binding jig PJ1 ... Top pressing jig PJ2 ... Second pressing jig CR ... Jig controller OJ ... Expansion jig RJ ... Rotating roller jig EV HV ... Vehicle LD ... Load; CP ... Power supply for charging; DS ... Discharge switch; CS ... Charge switch OL ... Output line; HT ... Host device DI ... Pack input / output terminal; DA ... Pack abnormal output terminal; Terminal

Claims

A battery stack formed by stacking a plurality of prismatic battery cells having a rectangular outer shape;
A covering case having an opening on one side for storing the battery stack;
A method of manufacturing a power supply device comprising:
In a state where the prismatic battery cells are stacked, pressing both side end faces of the battery stack with a single or a plurality of binding jigs; and
While being sandwiched between the single or plural binding jigs, the battery stack is positioned at an opening portion opened on one surface of the covering case, while releasing the pressing of the single or plural binding jigs, Inserting the battery stack from the opening of the covering case;
The manufacturing method of the power supply device characterized by the above-mentioned.
It is a manufacturing method of the power supply device according to claim 1,
The single or plural binding jigs are composed of a first binding jig, a second binding jig, and a third binding jig arranged in order from the bottom in the height direction,
Inserting through the opening of the covering case,
In a state of being sandwiched between the first binding jig, the second binding jig, and the third binding jig, the battery stack is positioned at the upper surface opening of the covering case,
Releasing the pressing of the first binding jig, lowering the battery stack, and inserting the battery stack from the lower end into the opening of the covering case;
Furthermore, releasing the pressing of the second binding jig, further lowering the battery stack, and pushing the insertion into the covering case,
Furthermore, releasing the pressing of the third binding jig, pressing the battery stack with an upper surface pressing jig from the upper surface, press-fitting the battery stack into the covering case,
The manufacturing method of the power supply device characterized by the above-mentioned.
It is a manufacturing method of the power supply device according to claim 2,
A method of manufacturing a power supply device, wherein the battery stack is formed by arranging an end plate on an end face.
It is a manufacturing method of the power supply device according to claim 3,
The method of manufacturing a power supply device, wherein the upper surface pressing jig presses the upper surface of the end plate when the battery stack is press-fitted from the upper surface.
It is a manufacturing method of the power supply device according to any one of claims 1 to 4,
The covering case has a frame shape opened in the vertical direction,
A method of manufacturing a power supply device, wherein when the battery stack is press-fitted into the covering case, the opening portion of the end face plate of the covering case is expanded from the lower opening end with an expanding jig.
A battery stack formed by stacking a plurality of prismatic battery cells having a rectangular outer shape;
A covering case having an opening on one side for storing the battery stack;
A method of manufacturing a power supply device comprising:
Inserting both end faces between a pair of rotatable rotating roller jigs in a state where the rectangular battery cells are stacked,
In a state where the battery stack is inserted and clamped between the rotating roller jigs, the battery stack is positioned at one surface opening of the covering case, and the battery stack is inserted into the covering case. Rotating the tool in opposite directions and inserting the battery stack from one end surface into the opening of the covering case while maintaining the battery stack in a pressed state;
The manufacturing method of the power supply device characterized by the above-mentioned.
It is a manufacturing method of the power supply device according to claim 6,
The covering case has an open top surface for storing the battery stack,
The battery stack is positioned in the upper surface opening of the covering case, and the pair of roller jigs are rotated in opposite directions so as to lower the battery stack, thereby maintaining the battery stack in a pressed state. The battery stack is lowered while being inserted from the lower end into the opening of the covering case.
A battery stack formed by stacking a plurality of prismatic battery cells having a rectangular outer shape;
A covering case having an open top surface for accommodating the battery stack;
With
The battery stack is press-fitted into the covering case without a fastener for fastening in a stacked state.
A battery stack formed by stacking a plurality of prismatic battery cells having a rectangular outer shape;
A covering case having an open top surface for accommodating the battery stack;
With
The battery stack is a power supply device in which pressure is applied in the stacking direction of the rectangular battery cells in a state of being housed in the covering case.
A vehicle comprising the power supply device according to claim 8 or 9.