JP2015187912A - Method for manufacturing power supply device, power supply device, and electrically driven vehicle and power storage device having the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate a positioning work of a plurality of sheets of battery cells when assembling a power supply device.SOLUTION: A power supply device 100 comprises: a plurality of battery cells 1 having a rectangular contour; an end plate 3 covering each of edge surfaces of a battery laminate 2 in which a plurality of battery cells 1 are laminated; and a fastening means to fasten end plates 3 each other. A method for manufacturing the power supply device 100 comprises: a step for positioning a positioning part 30 provided on at least part of the end plate 3 so as to become flush with at least one surface of each of battery cells 1 in a state that the end plate 3 is covered on the battery laminate 2; a step for pressing the end plate 3 by a jig JG so that a thickness in a lamination direction of the battery laminated 2 becomes slightly narrower than that in a state the end plates 3 are fasten by the fastening means 4; a step for holding the fastening means 4 to the end plate 3; and a step for releasing the jig JG from the end plate 3.

Description

  The present invention relates to a power supply device in which a plurality of batteries are connected, and an electric vehicle and a power storage device including the power supply device, and a method of manufacturing the power supply device, and particularly, mounted on an electric vehicle such as a hybrid vehicle, a fuel cell vehicle, an electric vehicle, and an electric motorcycle. Power supply device for the motor that is driven to drive the vehicle, or a power supply device that supplies power to a power source for large current used for household or factory power storage applications, and an electric vehicle and power storage device including the power supply device, and The present invention relates to a method for manufacturing a power supply device.

  A power supply device including a plurality of battery cells is used for a power supply device for a vehicle such as a hybrid vehicle or an electric vehicle, or a power source for a power storage system for a factory or a home. In such a power supply device, a large number of battery cells are connected in series and / or in parallel to improve output (see, for example, Patent Document 1).

  As shown in FIG. 20, these battery cells are stacked by interposing a spacer 205 between the battery cells 201 to form a battery stack. Further, both end surfaces of the battery stack are covered with an end plate 203, and the end plates 203 are fastened with a bind bar 204 to constitute a power supply device.

  Such a power supply device is mounted and fixed on, for example, a cooling plate for cooling, or is fixed to a vehicle chassis in the case of in-vehicle use. At this time, in order to stably fix the power supply device and improve the heat conductivity at the contact surface of the power supply device to improve the heat dissipation, the power supply device is positioned in advance so that the bottom surfaces of the power supply devices are aligned on the same plane. It is necessary to keep. For this reason, when assembling the power supply apparatus, when stacking a plurality of battery cells, it is necessary to align the battery cells so that they are on the same plane.

  However, conventionally, since there is no mechanism for such alignment, it is not easy to align a plurality of battery cells so as to be aligned on the same plane, and it takes time and effort in the manufacturing process. In particular, the fastening operation of the battery stack with the bind bar has to be performed after fixing an insulating bus bar holder or the like on the upper surface of the battery stack. In order to insulate the metal bus bar from the battery cell, it is necessary to interpose an insulating bus bar holder between the battery cell and the bus bar. In order to obtain this configuration, the bus bar holder is first fixed to the battery stack and then fastened with the bind bar. Here, in order to fasten the end plates with the bind bar, as in the power supply device 210 shown in FIG. 21, the end plates 213 are pressed in advance with a jig JG or the like, and the distance between the end plates 213 is It is necessary to keep the state slightly shorter (by the distance d in FIG. 21) than at the time of fastening by the bar 214.

  However, in this state, since the battery cell 211 and the spacer 215 are already firmly pressed by the jig JG, it cannot be corrected even if there is a positional deviation between the battery cells 211. For this reason, in the assembly process of the power supply device, it is necessary to position the battery cell and the end plate at an early stage. However, since a mechanism for performing such positioning has not been prepared in the past, it must be performed manually. There was a problem that workability was extremely poor.

JP2011-154985A

  The present invention has been made to solve such conventional problems. A main object of the present invention is to provide a method of manufacturing a power supply device, a power supply device, an electric vehicle including the power supply device, and a power storage device that facilitate battery cell alignment when assembling 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 of manufacturing a power supply device of the present invention, a plurality of battery cells having a rectangular outer shape and each end surface of a battery stack in which the plurality of battery cells are stacked are respectively covered. A method of manufacturing a power supply device comprising an end plate and a fastening means for fastening the end plates together, wherein at least part of the end plate is covered with the end plate on the battery stack. The step of positioning the provided positioning portion so as to be flush with at least one surface of each battery cell, and the thickness of the battery stack in the stacking direction are fastened by the fastening means. Pressing with a jig so as to be slightly narrower than the state, fixing the fastening means to the end plate, and releasing the jig from the end plate It may include a process. Thereby, before fastening a battery laminated body with a fastening means, it can align so that several battery cells may be located in a line with respect to a positioning part, and can improve the workability | operativity of an assembly.

  According to the power supply device of the present invention, a plurality of battery cells having a rectangular outer shape, an end plate covering each end surface of the battery stack in which the plurality of battery cells are stacked, and the end plates are fastened together. In the power supply apparatus, a positioning unit that is flush with at least one surface of each battery cell can be provided on at least a part of the end plate. With the above-described configuration, it is possible to align the plurality of battery cells on the same surface using the positioning portion of the end plate, and it is possible to obtain an advantage that the heat dissipation and the like of each battery cell can be maintained constant.

  Furthermore, according to another power supply device of the present invention, the positioning portion is formed on a side surface of the end plate, and the positioning portion can be configured to be flush with the side surface of the battery cell. With the above configuration, positioning at the time of stacking and fastening can be easily performed using the side surface of the battery stack.

  Furthermore, according to another power supply device of the present invention, the battery cell has a surface covered with an insulating sheet, and one surface of the battery cell that is the same as the positioning portion is covered with the insulating cover. It can be the surface of the battery cell made. With the above configuration, positioning according to the actual outer shape of the battery cell can be achieved, and the flexibility at the time of manufacturing can be increased.

  Furthermore, according to another power supply device of the present invention, the insulating cover can be a heat shrinkable tube.

  Furthermore, according to another power supply device of the present invention, it is possible to further include an insulating spacer interposed between the battery cells constituting the battery stack.

  Furthermore, according to the electric vehicle which concerns on this invention, said power supply device can be provided. The vehicle includes a traveling motor that is supplied with power from the power supply device, a vehicle main body on which the power supply device and the motor are mounted, and wheels that are driven by the motor and cause the vehicle main body to travel.

  Furthermore, according to the power storage device of the present invention, the power supply device described above can be provided. The power storage device includes a power supply controller that controls charging / discharging of the power supply device, and the power supply controller enables charging of the power supply device with electric power from the outside. It can be controlled to charge.

It is a model perspective view which shows the power supply device which concerns on Embodiment 1 of this invention. It is a horizontal sectional view in the II-II line of the power supply device of FIG. It is a horizontal sectional view which shows a mode that the side surface of a battery laminated body is positioned. It is the perspective view seen from the slanting lower part which shows a power supply device. FIG. 4 is a horizontal sectional view showing a power supply device according to a second embodiment. FIG. 6 is a horizontal sectional view showing a power supply device according to Embodiment 3. FIG. 6 is a horizontal sectional view showing a power supply device according to a fourth embodiment. It is a flowchart which shows the manufacturing method of a power supply device. It is a horizontal sectional view which shows a mode that the end surface of a battery laminated body is pressed and clamped with a jig | tool. It is a perspective view of the power supply device which concerns on Example 1 of this invention. It is the XI-XI sectional view taken on the line of the power supply device shown in FIG. It is a partially expanded sectional view equivalent to the XII-XII line cross section of the power supply device shown in FIG. It is the perspective view which looked at the power supply device of FIG. 10 from diagonally downward. It is a disassembled perspective view of the power supply device shown in FIG. It is a disassembled perspective view of the electric laminated body of the power supply device shown in FIG. It is a perspective view which shows a battery cell. 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 which uses a power supply device for an electrical storage apparatus. It is a disassembled perspective view which shows the conventional power supply device. It is a schematic diagram which shows a mode that a bind bar is fastened to the conventional battery laminated body.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the embodiment described below exemplifies a method for manufacturing a power supply device, a power supply device, an electric vehicle including the power supply device, and a power storage device for embodying the technical idea of the present invention. The manufacturing method of the device, the power supply device, the electric vehicle including the same, and the power storage device are not specified as follows. In addition, 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.
(Embodiment 1)

FIG. 1 is a schematic perspective view of a power supply device 100 according to Embodiment 1 of the present invention, and FIG. 2 is a horizontal sectional view taken along line II-II of the power supply device 100 of FIG. In the power supply device 100 shown in these drawings, a plurality of battery cells 1 are stacked to form a battery stack 2. Each battery cell 1 is composed of a rectangular outer can, and the outer can is formed thin with a thickness smaller than a width. Further, the surface of the outer can is covered with an insulating cover 32 and insulated. Note that the insulating cover is not necessarily required and can be omitted. In the battery stack 2, a plurality of such battery cells 1 are stacked via the spacers 15, the end plates 3 are arranged on the end surfaces, and the end plates 3 are fastened together by the fastening means 4. The spacer 15 is composed of an insulating member in order to insulate the battery cells 1 from each other. Moreover, since the end plate 3 is fastened in a state where the battery stack 2 is stacked, the end plate 3 is made of a highly rigid member such as a metal. Furthermore, the fastening means 4 is similarly composed of a highly rigid metal plate or the like. Here, the metal plate is bent in a U shape in a sectional view, and the end portion is fixed to the end plate 3 by screwing or the like.
(Positioning part 30)

  Further, at least a part of the end plate 3 is provided with a positioning portion 30 which is substantially flush with at least a part of at least one surface of each battery cell 1. In the example of FIG. 2, the side surface of the end plate 3 is used as the positioning portion 30, and the side surfaces of the battery cells 1 are configured to be substantially flush with respect to this surface. With this configuration, the side surfaces of the battery stack 2 can be easily aligned on the same surface with the side surface of the end plate 3 as a reference, and positioning during stacking and fastening can be easily performed. In particular, since the conventional end plate is formed larger than the battery cell 211 as shown in FIG. 21, the side surface of the end plate 213 protrudes from the side surface of the battery cell 211, so that positioning on the side surface is difficult to perform. There was a problem. On the other hand, according to the present embodiment, the side surface of the end plate 3 is flush with the side surface of the battery cell 1, so that, for example, as shown in the horizontal sectional view of FIG. By pressing and clamping a flat jig FT or the like from the side, positioning in the left-right direction can be performed easily and reliably.

  Moreover, the site | part which provides a positioning part is not restricted to the side surface of an end plate, For example, it can also provide in a bottom face. Such an example is shown in a perspective view of the battery stack 2 of FIG. 4 as viewed obliquely from below. As shown in this figure, the bottom surface of the end plate 3 is also positioned as the positioning portion 30B so as to coincide with the bottom surface of each battery cell 1 respectively. In this case, the bottom surface can be easily matched by the weight of the end plate 3 or the battery cell 1 simply by placing the battery stack 2 on which the end plate 3 is stacked on the flat plate FP. As a result, the battery stack 2 can be positioned very easily in the height direction.

Preferably, a plurality of such positioning portions are provided. In particular, it is preferable to provide a plurality of positioning portions in directions intersecting each other. That is, by performing both the horizontal positioning as shown in FIG. 3 and the vertical positioning as shown in FIG. 4, each battery cell 1 and the end plate 3 can be positioned in a two-dimensional direction. Thus, it is possible to reliably align the battery stack 2 before fastening by the fastening member.
(Embodiment 2)

Further, the positioning portion is not limited to the configuration using the entire surface of one end plate, and may be provided on a part of the end plate. For example, in the power supply device 200 according to Embodiment 2 shown in FIG. 5, a part of the end plate 3C is protruded to form a surface that is the same as the side surface of the battery cell 1, and this surface is used as the positioning portion 30C. Yes. Also in this configuration, a horizontal jig can be easily positioned by pressing a flat jig or the like over the entire side surface of the battery stack 2. As described above, the entire side surface of the end plate is not necessarily used as the positioning unit, and only a part of the end plate can be used as the positioning unit. In this specification, the term “one surface of the end plate” does not mean only the entire surface, but also includes a form in which only a part of such a surface is used as a positioning portion.
(Embodiment 3)

Or, conversely, in power supply device 300 according to Embodiment 3 shown in FIG. 6, a part of end plate 3D is recessed to form a surface that is the same as the side surface of battery cell 1, and this surface is positioned. Part 30D. In this case, a jig that is in contact with the positioning portion 30D of the end plate 3D but does not come into contact with other portions of the end plate 3D is required. For example, the battery stack 2 can be similarly positioned in a horizontal plane by preparing a flat jig having a recess or an opening window corresponding to a portion protruding from the side surface of the end plate 3D.
(Embodiment 4)

  In the above example, each battery cell 1 covers the outer can with the insulating cover 32. For this reason, the positioning part is defined so as to be on the same plane with the surface height of the insulating cover 32 of the battery cell 1 as a reference. Thereby, the alignment according to the actual external shape of a battery cell is attained.

In other words, when each battery cell does not cover the outer can with an insulating cover, alignment is performed with reference to the surface of the outer can. An example of such a power supply device is shown in FIG. 7 as a fourth embodiment. In the power supply device 400 shown in this figure, each battery cell 1B does not cover the surface of the outer can with an insulating cover. Therefore, the positioning portion provided on the end plate 3E with the side surface of the outer can of the battery cell 1B as the reference surface. Positioning is performed with respect to 30E. Such a battery cell 1B, for example, when the outer can is formed of an insulating member, or when the insulating can be achieved by a surface treatment such as performing an insulating coating on the surface while being a metal outer can, Or the case where insulation is aimed at by insulation of a separator is mentioned, using a metal exterior can.
(Method for manufacturing power supply device)

  Next, the manufacturing method of a power supply device is demonstrated based on the flowchart of FIG. First, in step S1, the battery stack 2 is pressed with a jig JG. Specifically, a plurality of battery cells 1 are stacked with a separator interposed therebetween, and an end plate 3 is coated on the end surface to obtain a battery stack 2. In this state, as shown in FIG. 9 and the like, the positioning unit 30 provided on the end plate 3 positions the battery cells 1 so that one surface of the battery cells 1 is substantially in the same plane.

  Next, in step S2, the end plate 3 is pressed with the jig JG to sandwich the battery stack 2. Here, as shown in FIG. 9, the thickness of the battery stack 2 in the stacking direction is healed from the outer sides of the end plates 3 on both sides so that the thickness in the stacking direction is slightly narrower than that of the fastening means 4. The end plate 3 is pressed with the tool JG. For example, in the example of FIG. 2, a binding bar obtained by bending a metal plate into a U-shape in cross section is used as the fastening means 4. In this case, the jig JG is pressed so that the stack length of the battery stack 2 is shorter than the U-shaped inner diameter of the bind bar. Thereby, the fixing operation | work of the fastening means 4 mentioned later can be performed easily.

  Next, the fastening means 4 is fixed to the end plate 3 in step S3. Here, since the gap between the end plates 3 is maintained to be slightly narrower than the state of being fastened in the fastened state by clamping with the jig JG, the fastening means 4 can be relatively easily connected to each end plate 3. Can be set to

After fixing the fastening member to the end plate 3, the process proceeds to step S <b> 4 and the jig JG is released from the end plate 3. In this way, a power supply device in which the battery stack 2 is fastened by the fastening means 4 is obtained. According to this method, since the plurality of battery cells can be positioned on the same surface by the positioning unit 30 before the end plate 3 is fastened by the fastening means 4, workability during assembly can be improved. Further, in the obtained power supply device, since the battery cells are aligned on the same surface, for example, the contact surface with the heat radiating plate when fixed to the heat radiating plate can be made uniform in each battery cell. Can be expected to improve the reliability of
(Example 1)

  Hereinafter, the example applied to the vehicle-mounted power supply device as a power supply device which concerns on Example 1 of this invention is demonstrated based on FIGS. In these drawings, FIG. 10 is a perspective view of the power supply apparatus 1000, FIG. 11 is a cross-sectional view taken along the line XI-XI of the power supply apparatus 1000 in FIG. 10, and FIG. 13 is a partially enlarged cross-sectional view, FIG. 13 is a perspective view of the power supply device 1000 of FIG. 10 as viewed obliquely from below, FIG. 14 is an exploded perspective view of the power supply device 1000 of FIG. FIG. 16 is a perspective view of the battery cell 1. The power supply apparatus 1000 shown in these drawings is suitable mainly for the power source of an electric vehicle such as a hybrid vehicle that travels by both an engine and a motor and an electric vehicle that travels by only a motor. However, the power supply device of the present invention can be used for vehicles other than hybrid vehicles and electric vehicles, or can be used for applications requiring high output other than electric vehicles.

A power supply apparatus 1000 shown in FIGS. 10 to 16 includes a plurality of battery cells 1 in which a gas discharge port 12 having a gas discharge valve 11 is provided in a sealing plate 10, and a battery stack formed by stacking these battery cells 1. 2 and a gas duct 6 fixed on one surface of the battery stack 2 so as to be connected to the gas discharge port 12 of each battery cell 1. Furthermore, the power supply apparatus 1000 includes an end plate 3 disposed on both end faces of the battery stack 2 and fastening means 4 that are fixed to the end plate 3 and fasten the battery stack 2 in the stacking direction via the end plate 3. Is provided. The fastening means 4 is further fixed to the end plate 3 so as to be disposed on one surface of the battery stack 2 and opposite to the surface to which the gas duct 6 is fixed. Second fastening means 5 for fastening the body 2 in the stacking direction is provided. In the power supply device 1000 of FIG. 14, the gas duct 6 is disposed at a fixed position of the battery stack 2 via the second fastening means 5.
(Battery stack 2)

A power supply apparatus 1000 shown in FIGS. 10 to 16 forms a battery stack 2 by laminating a plurality of battery cells 1 having a rectangular outer shape. Each battery cell 1 has a rectangular outer can and is provided with a gas discharge valve 11 for discharging gas generated inside the outer can. The battery cell 1 is provided with a gas discharge port 12 for discharging gas from the gas discharge valve 11 on the surface of the outer can. In the battery stack 2 shown in FIG. 15, a plurality of battery cells 1 are stacked in a posture in which the sealing plate 10 is disposed on substantially the same surface, and a plurality of gas discharge ports 12 are disposed on the first surface 2A. . Moreover, the battery laminated body 2 has laminated | stacked the several battery cell 1 with the attitude | position which makes the sealing board 10 in which the gas exhaust valve 11 is provided the upper surface.
(Battery cell 1)

As shown in the perspective views of FIGS. 15 and 16, the battery cell 1 is a square battery that is wider than the thickness, that is, thinner than the width. A plurality of the battery cells 1 are stacked in the thickness direction to form a battery stack 2. Each battery cell 1 is a lithium ion secondary battery. However, the battery cell may be a secondary battery such as a nickel metal hydride battery or a nickel cadmium battery. The battery cell 1 of FIG. 15 is a battery having a rectangular shape with both wide surfaces, and the battery stack 2 is formed by laminating both surfaces to face each other. Each battery cell 1 is provided with positive and negative electrode terminals 13 projecting from both ends of a sealing plate 10 on the upper surface, and a gas exhaust port 12 of a gas exhaust valve 11 is provided at the center. In the rectangular battery cell 1, an opening of an outer can that is formed by pressing a metal plate into a cylindrical shape that closes the bottom is closed and sealed with a sealing plate 10. The sealing plate 10 is a flat metal plate, and its outer shape is the shape of the opening of the outer can. The sealing plate 10 is laser welded and fixed to the outer peripheral edge of the outer can so as to airtightly close the opening of the outer can. The sealing plate 10 fixed to the outer can has positive and negative electrode terminals 13 fixed to both ends thereof, and a gas discharge port 12 is provided between the positive and negative electrode terminals 13. A gas discharge valve 11 is provided inside the gas discharge port 12.
(Insulation cover 32)

  The surface of the outer can is covered with an insulating cover 32. The insulating cover 32 can be composed of an insulating resin sheet or the like. As such a material, an inexpensive PET resin excellent in insulation can be used. Preferably, by using a heat shrinkable tube, the surface of the outer can can be easily covered using heat shrinkage.

  The plurality of battery cells 1 to be stacked are connected in series and / or in parallel with each other by connecting positive and negative electrode terminals 13. The power supply device connects positive and negative electrode terminals 13 of adjacent battery cells 1 to each other in series and / or in parallel via a bus bar 14. A power supply device that connects adjacent battery cells in series can increase the output voltage by increasing the output voltage, and can connect adjacent battery cells in parallel to increase the charge / discharge current.

In the battery stack 2 shown in FIGS. 14 and 15, twelve battery cells 1 are stacked on each other via a spacer 15, and these battery cells 1 are connected in series. In the illustrated battery stack 2, adjacent battery cells 1 are arranged in opposite directions, and electrode terminals 13 adjacent on both sides thereof are connected by a bus bar 14 to connect two adjacent battery cells 1 in series. All battery cells 1 are connected in series. However, the present invention does not specify the number of battery cells constituting the battery stack and the connection state thereof.
(Spacer 15)

  As shown in FIG. 15, the battery stack 2 has spacers 15 sandwiched between stacked battery cells 1. The spacer 15 insulates adjacent battery cells 1. The spacer 15 shown in the figure is an insulating sheet. As this insulating sheet, for example, a plastic sheet made of modified PPE can be used. Since the spacer 15 made of a plastic insulating sheet can be reduced in thickness, there is a feature that the entire length of the battery stack 2 can be shortened to make the whole compact. However, as the spacer, a plastic molded into a plate shape can be used. The spacers can be stacked so that adjacent battery cells are not displaced as a shape in which the battery cells are fitted and arranged at a fixed position. In addition, the spacer molded from plastic can cool the battery cell by providing a cooling gap on the surface for allowing a cooling gas such as air to pass through. With this structure, air can be forcedly blown into the cooling gap to directly and efficiently cool the outer can of the battery cell. Furthermore, the spacer formed of a plastic having a low thermal conductivity has an effect of effectively preventing thermal runaway of adjacent battery cells.

As described above, the battery cell 1 that is insulated and stacked by the spacer 15 can have an outer can made of metal such as aluminum. However, the battery stack does not necessarily need to interpose a spacer between the battery cells. For example, battery cells adjacent to each other can be formed by forming the battery cell outer can with an insulating material, or coating the outer periphery of the battery cell outer can with the above-described insulating cover 32 or with an insulating paint or the like. It is because a spacer can be made unnecessary by insulating each other. Furthermore, the battery stack without interposing a spacer between battery cells is a method of directly cooling using a refrigerant or the like without adopting an air cooling method in which cooling air is forced between the battery cells to cool the battery cells. Can be used to cool the battery cell.
(End plate 3)

  A pair of end plates 3 are arranged on both end faces of the battery stack 2, and the battery stack 2 is fastened by being sandwiched from both ends by the pair of end plates 3. The end plate 3 is a quadrangle having the same shape and dimensions as the outer shape of the battery cell 1 and sandwiches the stacked battery stack 2 from both end faces. The end plate 3 in FIG. 14 is entirely made of metal. The metal end plate is strong as a whole, and can stably hold the battery stack from both ends. However, the end plate can be entirely made of plastic, or can be reinforced by fixing a reinforcing bracket to a plastic main body.

  The end plate 3 shown in the drawing is provided with fitting recesses 3A and 3B for the fastening means 4 and the second fastening means 5 on the outer surface so that the fastening means 4 and the second fastening means 5 can be fixed in place. The end plate 3 shown in the figure has connecting recesses 3A for fitting connecting portions 4B provided at both ends of the fastening means 4 at the corners of the four corners of the outer surface in order to place and fix the fastening means 4 in place. Provided. In the end plate 3 shown in the figure, the shape of the fitting recess 3A is such that the connecting portion 4B of the fastening means 4 can be fitted. Further, the end plate 3 is fitted to fit the connecting portions 5B provided at both ends of the second fastening means 5 to the upper end portions of the outer surface in order to place and fix the second fastening means 5 in place. A recess 3B is also provided. In the end plate 3 shown in the figure, the shape of the fitting recess 3B is such that the connecting portion 5B of the second fastening means 5 can be fitted.

Further, the end plate 3 shown in the drawing is provided with female screw holes 3a and 3b for screwing set screws 18 and 19 for fixing both ends of the fastening means 4 and the second fastening means 5 on the outer peripheral surface. The end plate 3 shown in the figure has female screw holes 3a through which set screws 18 for fixing a pair of fastening means 4 arranged at the upper ends of both side surfaces 2B of the battery stack 2 are inserted into the left and right sides of the upper surface of the end plate 3. Are provided at both ends. The end plate 3 has a female screw hole 3b through which a set screw 18 for fixing the pair of fastening means 4 disposed at the lower end portions of the both side surfaces 2B of the battery stack 2 is inserted, and the lower end of both side surfaces of the end plate 3. Provided in the department. Furthermore, the end plate 3 has a female screw hole 3b through which a set screw 19 for fixing the second fastening means 5 disposed on the first surface 2A of the battery stack 2 is inserted in the center portion of the upper surface of the end plate 3. Provided. The above structure is a direction in which the axial direction of the set screws 18 and 19 screwed into the end plate 3 intersects the stacking direction of the battery stack 2. For this reason, in a state where the power supply device vibrates by receiving a force from the outside, the shearing force acting on the shaft portions of the set screws 18 and 19 screwed into the end plate 3 is reduced, and the set screws 18 and 19 are protected. A stronger connection strength can be realized. Further, there is also a feature that the set screws 18 and 19 can be more firmly connected by making the entire length of the set screws 18 and 19 larger than the thickness of the end plate 3, that is, by increasing the total length of the set screws 18 and 19.
(Fastening means 4)

  As shown in FIGS. 10 and 13, the fastening means 4 extends in the stacking direction of the battery stack 2, and both ends are fixed to the end plate 3 to fasten the battery stack 2 in the stacking direction. The fastening means 4 shown in the figure is arranged to face both side surfaces 2B different from the first surface 2A of the battery stack 2. As described above, the structure in which the fastening means 4 is arranged and fastened on both side surfaces 2B of the battery stack 2 can more securely fasten the plurality of battery cells 1 in the stacking direction. However, the fastening means is not necessarily arranged on both side surfaces of the battery stack. The fastening means can be disposed on the top surface and the bottom surface in addition to the both side surfaces of the battery stack, or can be disposed only on the top surface and the bottom surface without being disposed on both side surfaces.

  The fastening means 4 is a metal plate having a predetermined width and a predetermined thickness along the surface of the battery stack 2. The fastening means 4 can be a metal plate such as iron, preferably a steel plate. The fastening means 4 made of a metal plate is provided with connecting portions 4B that are connected to the end plate 3 at both ends of the binding portion 4A. The fastening means 4 shown in the drawing is bent at substantially right angles at both ends along the outer surface of the end plate 3 to provide a connecting portion 4B. In the fastening means 4, the connecting portions 4 </ b> B at both ends are connected to the end plate 3, whereby the connecting portions 4 </ b> B of the fastening means 4 are locked to the pair of end plates 3 disposed at both ends of the battery stack 2. The battery laminate 2 is sandwiched from both ends so that the end plates 3 are spaced at a predetermined interval. In the fastening means 4 in FIG. 14, the connecting portion 4 </ b> B is connected to fitting recesses 3 </ b> A provided at the four corners of the end plate 3, and the pair of end plates 3 are connected by the four fastening means 4. Therefore, the connecting portion 4 </ b> B of the fastening means 4 is bent so as to follow the fitting recess 3 </ b> A of the end plate 3. Further, both ends of the fastening means 4 are fixed to the end plate 3 with set screws 18. The fastening means 4 shown in the figure is provided with opening through holes into which set screws 18 are inserted at both ends of the binding portion 4A. The fastening means 4 has a female screw provided on the outer peripheral surface of the end plate 3 by inserting a set screw 18 into the through hole in a state where the connecting portions 4B at both ends are connected to the fitting recess 3A of the end plate 3. It is screwed into the screw hole 3a and fixed to the pair of end plates 3.

  According to this configuration, as described above, the axial direction of the set screws 18 and 19 to be screwed into the end plate 3 and the stacking direction of the battery stack 2 intersect each other, and the set screws 18 and 19 are protected while being stronger. In addition to this, the connection portion 4B of the fastening means 4 is locked to the end plate 3 so that the connection strength of the battery stack 2 is also strong. Can be realized. Further, in this configuration, since the set screws 18 and 19 are not positioned in the stacking direction of the battery stack 2, it is possible to suppress an increase in size of the power supply device. Specifically, since the size of the end plate 3 is approximately the same as the size of the outer can of the battery cell 1, there is a margin in the vertical direction of the end plate 3 by the size of the electrode terminal 13 of the battery cell 1. By adopting the above configuration, it is possible to suppress an increase in size of the power supply device.

Furthermore, the fastening means 4 shown in FIG. 11 and FIG. 14 is arranged at the corners of the four corners of the battery stack 2 with the cross-sectional shape of the binding portion 4A being L-shaped. 4 A of bind parts of this shape can arrange | position an inner surface in the state which follows the corner part of the battery laminated body 2, and can suppress the vibration of the battery cell 1 laminated | stacked mutually up and down and right and left. That is, the vertical portion along the side surface 2B of the battery stack 2 can prevent left-right vibration of the battery cell 1, and the horizontal portion along the top and bottom surfaces of the battery stack 2 can prevent vertical vibration of the battery cell 1. Because. Furthermore, there is also a feature that the bending strength of the binding portion 4A can be increased by making the cross-sectional shape L-shaped. However, the fastening means does not necessarily need to have an L-shaped cross-sectional shape for all of the binding portions, and only the upper fastening means has an L-shaped cross-sectional shape and is arranged at the upper corner of the battery stack. In addition, only the lower fastening means can be arranged in the lower corner portion of the battery stack with the L-shaped cross section. Further, the fastening means is not necessarily arranged along the corner portion of the battery stack, and can be arranged along both side surfaces of the battery stack or along both side surfaces and the bottom surface. Furthermore, a fastening means can also be made into the plate shape in alignment with the side surface of a battery laminated body. The plate-shaped main fixture can also open the opening.
(Gas duct 6)

  The gas duct 6 is a first surface which is the upper surface of the battery stack 2 in a posture facing the gas discharge port 12 of each battery cell 1 so as to guide the gas discharged from the gas discharge valve 11 to the outside of the power supply device. It is arranged on the surface 2A. The gas duct 6 is designed to have sufficient strength so as not to be destroyed when high-pressure and high-temperature gas is discharged, and preferably made of a plastic excellent in heat resistance and chemical resistance, for example, made of polybutylene terephthalate. . However, the gas duct can be made of plastic such as nylon resin or epoxy resin. In addition, the structure which shape | molds a gas duct with resin has the advantage that it is excellent in workability and there are few restrictions on a design.

The gas duct 6 shown in FIGS. 11 and 12 is formed in a hollow shape, and is a surface facing the battery stack 2 and at a position facing the gas discharge port 12 of each battery cell 1. The connection opening 6b connected to is provided. The gas duct 6 shown in the figure is provided with a columnar gas passage 46 inside, and gas discharged from the gas discharge port 12 of the battery cell 1 flows into the gas passage 46 through the connection opening 6b. Yes.
(Duct discharge part 6x)

Furthermore, as shown in FIGS. 12 to 14, the gas duct 6 is provided with a duct discharge portion 6x that discharges the gas inside the gas duct 6 to the outside at one end. The gas duct 6 shown in the drawing is formed as a duct discharge portion 6x by connecting a hollow pipe projecting from the upper surface to a cylindrical pipe communicating with an internal gas path 46. In the gas duct 6 shown in FIG. 12, an external gas discharge path 36 is connected to the duct discharge portion 6x to discharge the gas flowing in from the gas duct 6 to the outside.
(Bus bar holder)

  Furthermore, in the power supply device shown in FIGS. 11, 12, and 14, the bus bar holder 8 is disposed on the first surface 2 </ b> A of the battery stack 2, and the sealing of the battery cells 1 stacked on each other by the bus bar holder 8. The plate 10 is covered. The bus bar holder 8 is formed in an outer shape along the upper surface of the battery stack 2. Here, in the power supply apparatus shown in the figure, the bus bar holder 8 is also used as the second duct 6B of the gas duct 6. That is, the bus bar holder 8 shown in the figure is provided with a plurality of connection openings 6b by using a portion facing the plurality of gas discharge ports 12 arranged at the center of the battery stack 2 as the second duct 6B. . Therefore, the bus bar holder 8 is formed of an insulating plastic such as nylon resin or epoxy resin.

  Furthermore, as shown in FIGS. 11 and 14, the bus bar holder 8 is provided with an opening window 24 for disposing the bus bar 14 at a position facing the electrode terminal 13 of the battery cell 1. The bus bar holder 8 in the figure is provided with a plurality of opening windows 24 along both sides of the battery stack 2 on both sides of the central portion constituting the second duct 6B. The opening window 24 is sized and shaped along the outer shape of the bus bar 14 so that it can be connected to the electrode terminal 13 while guiding the bus bar 14 to a fixed position. The bus bar 14 disposed in the opening window 24 of the bus bar holder 8 is fixed to the electrode terminal 13 of the battery cell 1 by welding such as laser welding, and connects the plurality of battery cells 1 to a predetermined connection state. However, the power supply device does not necessarily need to arrange the bus bar holder on the first surface of the battery stack. The bus bar holder 8 described above is fixed to the first surface of the battery stack 2 via the second fastening means 5 that connects the gas duct 6 to the battery stack 2.

As described above, the structure in which the bus bar holder 8 arranged on the first surface 2A of the battery stack 2 is also used as the gas duct 6 allows the gas duct 6 to be arranged easily and at low cost by reducing the number of parts. Further, the structure in which the bus bar holder 8 is also used as the second gas duct 6B allows the first gas duct 6A to be connected in a state where the battery stack 2 is fastened in advance through the fastening means 4 in the assembly process of the power supply device. Therefore, the first gas duct 6A can be more reliably connected to the second gas duct 6B in an airtight state. However, the power supply device of the present invention can be disposed on the first surface of the battery stack without using the bus bar holder as a gas duct, with the gas duct as a separate member.
(Second fastening means 5)

  The gas duct 6 described above is disposed opposite to the gas discharge port 12 of the battery stack 2 and is fixed at a fixed position via the second fastening means 5 disposed on the first surface 2A of the battery stack 2. The As shown in FIG. 14, the second fastening means 5 is disposed to face the first surface 2 </ b> A of the battery stack 2, and the gas duct 6 is disposed at a fixed position of the battery stack 2. The second fastening means 5 also has both ends fixed to the end plate 3 and fastens the battery stack 2 with the first surface 2A. The second fastening means 5 is a metal plate having a predetermined width and thickness, and a metal plate such as iron, preferably a steel plate can be used. The second fastening means 5 made of a metal plate is provided with connecting portions 5B that are connected to the outer surface of the end plate 3 at both ends of the binding portion 5A.

  The second fastening means 5 shown in the figure includes two rows of binding portions 5A and a connecting portion 5B formed by connecting both ends of these binding portions 5A. Two rows of binding portions 5 </ b> A are arranged along both sides of the gas duct 6. The two rows of binding portions 5A are arranged at predetermined intervals so that the flange portions 6a provided on both sides of the gas duct 6 can be pressed. The second fastening means 5 is fixed to the end plate 3 in a state where the gas duct 6 is disposed between the two rows of binding portions 5A, and presses the flange portion 6a with the two rows of binding portions 5A. The two rows of binding portions 5A are connected at both ends by connecting portions 5B, and the connecting portions 5B are bent at substantially right angles and connected to the end plate 2. The second fastening means 5 connects the battery stack 2 from both ends by connecting the connecting portions 5B at both ends to the fitting recesses 3B provided on the end plate 3, with the pair of end plates 3 being set at a predetermined interval. . Furthermore, the second fastening means 5 is fixed to the end plate 3 with set screws 19 at both ends thereof. The second fastening means 5 shown in the drawing is provided with opening through holes into which set screws 19 are inserted at both ends of the binding portion 5A. The second fastening means 5 inserts a set screw 19 into the through hole in a state where the connecting portions 5B at both ends are connected to the fitting recess 3B of the end plate 3, and the set screw 19 is provided on the outer peripheral surface of the end plate 3. Screwed into the female screw holes 3b and fixed to the pair of end plates 3.

  The second fastening means 5 shown in the figure integrally forms the two rows of binding portions 5A and the connecting portions 5B at both ends, but the second fastening means can also be divided into two. Although not shown in the drawing, the second fastening means divided into two parts may be arranged along both sides of the gas duct and press the claws along the flanges protruding from both sides of the gas duct at each binding part. it can.

Furthermore, although not shown, the second fastening means can connect two rows of binding portions with a bridging portion provided in the middle, and this bridging portion can be disposed on the upper surface of the gas duct. This 2nd fastening means can press the upper surface of a gas duct in a bridge part, and can arrange | position a gas duct in the fixed position of the 1st surface of a battery laminated body. Furthermore, although not shown, the second fastening means is provided with a row of binding portions, and the upper surface of the gas duct is pressed by this binding portion, and the gas duct is disposed at a fixed position on the first surface of the battery stack. You can also.
(Circuit board)

  Furthermore, the power supply device shown in FIGS. 11 and 14 includes a circuit board 9 connected to the battery stack 2, and the circuit board 9 is located above the gas duct 6 and between the top cover 20. It is arranged. The top cover 20 shown in the drawing is provided with a storage recess 21 for storing the circuit board 9 on the upper surface side, and the circuit board 9 is stored in the storage recess 21. The circuit board 9 is mounted with an electronic component (not shown) that implements a protection circuit for the battery cell 1. The circuit board 9 is mounted with a voltage detection circuit that detects the cell voltage connected to each battery cell 1, a temperature detection circuit that detects the temperature of the battery cell 1, etc. 1 is controlled so as to prevent overcharging and overdischarging, or charging / discharging is controlled so as to prevent an abnormal temperature rise of the battery cell 1. Electronic components that realize these circuits are arranged on the circuit board 9 and stored in the storage recess 21.

The circuit board 9 shown in the figure is arranged at a fixed position on the upper surface of the gas duct 6 via the second fastening means 5. The second fastening means 5 shown in FIGS. 11, 12, and 14 fixes a plurality of nuts 26 on the upper surface of the binding portion 5 </ b> A in order to fix the circuit board 9. In the illustrated power supply device, a set screw 25 penetrating the circuit board 9 is screwed into a nut 26 provided in the second fastening means 5, and the circuit board 9 is disposed at a fixed position on the upper surface of the gas duct 6. In this power supply device, since the second fastening means 5 made of a metal plate is disposed between the circuit board 9 and the battery stack 2, the circuit board 9 is attached to the battery stack 2 with the metal plate of the second fastening means 5. Can shield from. Furthermore, since the power supply device has the metal layer 17 provided on the inner surface of the gas duct 6, the circuit board 9 can be shielded from the battery stack 2 by the metal layer 17. The battery stack 2 is charged and discharged with a large current, and is charged and discharged with a particularly large pulse current, so that pulse noise is emitted. The metal plate 17 of the second fastening means 5 and the metal layer 17 of the gas duct 6 are located between the circuit board 9 and the battery stack 2 and shield the circuit board 9 from pulsed induced noise radiated from the battery stack 2. Thus, there is a feature that it is possible to prevent malfunction due to induction noise of the circuit board 9. In particular, the induction noise from the battery stack 2 can be more effectively shielded by connecting the second fastening means, which is a metal plate, to the ground line.
(Top cover)

  Furthermore, the power supply apparatus of FIGS. 11 and 12 has a top cover 20 disposed on the upper surface. The top cover 20 covers the upper surface of the bus bar holder 8 and covers and protects the bus bar 14 and the circuit board 9 connected to the battery stack 2. Therefore, the top cover 20 has an outer shape that can cover the upper surface of the bus bar holder 8 and is molded of plastic into a shape having a space in which the circuit board 9 can be accommodated. The top cover 20 of FIG. 11 is formed into a shallow container shape with a lower opening as a whole, the central portion is formed one step deeper than the surroundings, and a storage recess 21 for storing the circuit board 9 is provided. .

  Further, as shown in FIG. 10, the top cover 20 is provided with a notch 22 at one end for projecting the duct discharge part 6x of the gas duct 6 to the outside. As shown in FIG. 10, the top cover 20 causes the duct discharge part 6 x to be exposed to the outside from the notch part 22 while being connected to the upper surface of the battery stack 2. Furthermore, the top cover 20 shown in FIG. 10 has output terminal windows 23 at both ends. In the battery stack 2, output terminal plates 16 are connected to the electrode terminals 13 of the battery cells 1 arranged at both ends. The top cover is provided with terminal windows 23 opened at both ends for exposing these output terminal plates 16 to the outside.

  The above top cover 20 is fixed to the gas duct 6 via a set screw 27. In the gas duct 6 shown in FIG. 14, a connecting boss 28 is integrally formed on the upper surface in order to fix the top cover 20 at a fixed position. The connecting boss 28 in FIG. 14 is provided so as to protrude from the upper surface of both end portions of the gas duct 6. The top cover 20 has a through hole 29 at a position facing the connection boss 28, and a set screw 27 inserted through the through hole 29 is screwed into the connection boss 28 of the gas duct 6 to fix the battery stack 2. Fixed in position. The power supply device provided with the top cover 20 can prevent the connection portion between the battery cells 1 having a high voltage, the circuit board 9 and the like from being exposed. For example, the battery is inadvertently used during maintenance. It is possible to prevent the circuit from being short-circuited by contacting the connection portion between the cells 1 or the circuit board 9 or the like. Also, a simple waterproof effect can be obtained.

  In the power supply device of the above embodiment, the gas duct 6 is fixed to the first surface 2A of the battery stack 2 via the second fastening means 5. However, the gas duct is not necessarily fixed to the battery stack through the second fastening means, and can be fixed to the battery stack through another connection structure.

  The power supply device is cooled, for example, by arranging a cooling plate on the bottom surface of the battery stack and transferring heat to the cooling plate. The cooling plate can be forcibly cooled by circulating a coolant inside the cooling plate, and can be efficiently cooled by heat exchange. Further, instead of the cooling plate, for example, in the case of an in-vehicle power supply device, the battery stack may be fixed to the chassis of the car and naturally radiated by heat exchange with the chassis. Moreover, the fixing position of such a cooling plate etc. does not necessarily need to be made into the bottom face of a battery laminated body, and can also be made into other surfaces, such as a side surface. Alternatively, it may be an air-cooling type in which cooling air is supplied to the battery cell. For example, the battery cell can be effectively air-cooled by providing the cooling air flow path in the spacer disposed between the battery cells as described above and flowing the cooling air therethrough.

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 1000 that supplies power to the motor 93, and a generator that charges a battery of the power supply device 1000. 94. The power supply apparatus 1000 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 apparatus 1000. 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 apparatus 1000. The generator 94 is driven by the engine 96, or is driven by regenerative braking when the vehicle is braked, and charges the battery of the power supply apparatus 1000.
(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 1000 that supplies power to the motor 93, and a generator 94 that charges a battery of the power supply device 1000. And. The power supply apparatus 1000 is connected to a motor 93 and a generator 94 via a DC / AC inverter 95. The motor 93 is driven by power supplied from the power supply apparatus 1000. The generator 94 is driven by energy when regeneratively braking the vehicle EV and charges the battery of the power supply apparatus 1000.
(Power storage device for power storage)

  Furthermore, this power supply apparatus can be used not only as a power source for a moving body but also as a stationary power storage facility. For example, as a power source for home and factory use, a power supply system that is charged with sunlight or midnight power and discharged when necessary, or a streetlight power supply that charges sunlight during the day and discharges at night, or during a power outage It can also be used as a backup power source for driving signals. Such an example is shown in FIG. The power supply apparatus 1000 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 battery cells connected in series and / or in parallel. Each battery pack 81 is controlled by a power controller 84. The power supply apparatus 1000 drives the load LD after charging the battery unit 82 with the charging power supply CP. Therefore, the power supply apparatus 1000 has a charge mode and a discharge mode. The load LD and the charging power source CP are connected to the power supply apparatus 1000 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 1000. In the charging mode, the power 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 1000. 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 1000 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 apparatus 1000 at the same time.

  A load LD driven by the power supply apparatus 1000 is connected to the power supply apparatus 1000 via a discharge switch DS. In the discharge mode of the power supply apparatus 1000, 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 1000. 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 1000. The power controller 84 also includes a communication interface for communicating with external devices. In the example of FIG. 19, 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.

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

100, 200, 210, 300, 400, 1000 ... power supply device 1, 1B ... battery cell 2 ... battery stack; 2A ... first surface; 2B ... side surface 3, 3C, 3D, 3E ... end plate; 3A ... fitting 3B: female threaded hole; 3b: female threaded hole 4 ... fastening means; 4A ... binding part; 4B ... connecting part 5 ... second fastening means; 5A ... binding part; 5B ... connecting part 6 ... Gas duct; 6A ... First duct; 6B ... Second duct 6a ... Gutter; 6b ... Connection opening; 6c ... Step recess; 6d ... Groove recess 6e ... Rib; 6t ... Top surface; 6x ... Duct discharge part DESCRIPTION OF SYMBOLS 7 ... Packing; 7b ... Through-hole 8 ... Bus-bar holder 9 ... Circuit board 10 ... Sealing plate 11 ... Gas exhaust valve 12 ... Gas exhaust port; 12A ... Track-shaped fracture | rupture part; 12B ... Second fracture part 13 ... Electrode terminal 14 ... Bus bar 15 ... spacer 16 ... output end Plate 17 ... Metal layer; 17A ... Metal sheet 18 ... Set screw 19 ... Set screw 20 ... Top cover 21 ... Storage recess 22 ... Notch 23 ... Terminal window 24 ... Open window 25 ... Nut 26 ... Set screw 27 ... Set screw 28 ... Connecting boss 29 ... Through hole 30, 30B, 30C, 30D, 30E ... Positioning portion 32 ... Insulating cover 36 ... Gas discharge path 46 ... Gas path 81 ... Battery pack 82 ... Battery unit 84 ... Power supply controller 85 ... Parallel connection switch 93 ... Motor 94 ... Generator 95 ... DC / AC inverter 96 ... Engines 201 and 211 ... Battery cells 203 and 213 ... End plates 204 and 214 ... Bind bars 205 and 215 ... Spacers JG and FT ... Jig FP ... Flat plate EV and HV ... Vehicle LD ... Load CP ... Charging power supply DS ... Discharge switch CS ... Charge switch OL ... Output line HT ... Host machine DI ... the inner diameter of the pack input and output terminals DA ... pack abnormal output terminal DO ... pack connection terminal d ... gas discharge port

Claims (8)

A plurality of battery cells having a rectangular outer shape;
An end plate for covering each end face of the battery stack in which the plurality of battery cells are stacked;
A method of manufacturing a power supply device comprising fastening means for fastening the end plates together,
In a state where the end plate is covered on the battery stack, a positioning portion provided on at least a part of the end plate is positioned so as to be flush with at least one surface of each battery cell;
Pressing the end plate with a jig so that the thickness in the stacking direction of the battery stack is slightly narrower than the state fastened by the fastening means;
Fixing the fastening means to the end plate;
And a step of releasing the jig from the end plate. A plurality of battery cells having a rectangular outer shape;
An end plate for covering each end face of the battery stack in which the plurality of battery cells are stacked;
A power supply device comprising fastening means for fastening the end plates together,
A power supply apparatus comprising: a positioning portion that is coplanar with at least one surface of each battery cell on at least a part of the end plate. The power supply device according to claim 2,
The power supply device, wherein the positioning portion is formed on a side surface of the end plate, and the positioning portion is configured to be flush with a side surface of the battery cell. The power supply device according to claim 2 or 3,
The battery cell has a surface coated with an insulating sheet,
One surface of the said battery cell used as the said positioning part is the surface of the battery cell coat | covered with the said insulating cover, The power supply device characterized by the above-mentioned. The power supply device according to any one of claims 2 to 4,
The power supply apparatus, wherein the insulating cover is a heat shrinkable tube. The power supply device according to any one of claims 1 to 5, further comprising:
A power supply apparatus comprising an insulating spacer interposed between battery cells constituting the battery stack. An electric vehicle comprising the power supply device according to any one of claims 1 to 6,
A traveling motor powered by the power supply device;
A vehicle body on which the power supply device and the motor are mounted;
An electric vehicle comprising: wheels driven by the motor to cause the vehicle body to travel. A power storage device comprising the power supply device according to any one of claims 1 to 6,
A power supply controller for controlling charging / discharging of the power supply device is provided, and the power supply controller is capable of charging the power supply device with electric power from outside and controlling the power supply device to be charged. A power storage device that is made possible.

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