JP2013051048A - Power supply device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power supply device including a fastener having high seismic resistance in which deformation of a cell is prevented by a simple configuration.SOLUTION: The power supply device comprises a cell block 2 formed by laminating rectangular parallelepiped cells in one direction, and end plates 23 placed at both ends of the cell block 2 in the lamination direction, and a fastener 3 which fastens the cell block 2 while pressing. The fastener 3 consists of a pair of bind bars 31 which are formed to surround the cell block 2 and the end plates 23, and installed on the end plates 23. Furthermore, it is provided with a cut 31A in the surface facing the end plates 23.

Description

  The present invention relates to a power supply device including a plurality of battery cells.

  A hybrid car, an electric vehicle, or the like is provided with a high-voltage output power supply device for driving an electric motor, and the power supply device includes a plurality of battery cells. By connecting battery cells in series, the output voltage of the power supply device can be increased, and by connecting them in parallel, the current capacity of the power supply device can be increased. As the battery cell constituting the power supply device, a secondary battery is used so that it can be repeatedly charged and discharged.

  Generally, a battery cell expand | swells by repeating charging / discharging, and the deterioration of the battery performance (input / output characteristic) accompanying expansion | swelling arises. Therefore, in a power supply device configured by stacking a plurality of battery cells, a fastener that prevents expansion of the battery cells by fastening the battery cells in a pressurized state and suppresses deterioration of battery performance due to expansion. There is a power supply equipped.

  As this type of power supply device, for example, a battery block formed by alternately laminating prismatic batteries (battery cells) and insulating separators that hold the prismatic batteries, and a pair of batteries disposed at both ends of the battery block There is known a power supply device including an end plate and a bind bar that is laid on the end plate and fastens in a state where the stacked rectangular batteries are pressed in the stacking direction (Patent Document 1).

  When assembling the power supply device of Patent Document 1, a battery block having end plates at both ends is pressed in the stacking direction using a binding jig that presses the center of the end plate, and the battery block in this state is fastened. The bind bar is fixed to the end plate with screws.

JP 2010-157450 A

  However, in the configuration of Patent Document 1, there is a possibility that the bind bar may come off when the screw fixing the bind bar is loosened. Further, even if the bind bar is not completely removed, there is a problem that when the screw is loosened, the force for pressurizing the battery block is weakened, and the expansion of the battery cell cannot be sufficiently suppressed. In particular, in a power supply device for a vehicle, since a vibration associated with traveling of the vehicle is transmitted to the power supply device, a power supply device including a fastener having high vibration resistance is required.

  The present invention has been made to solve such a problem, and it is an object of the present invention to provide a power supply device having a simple configuration that suppresses deformation of the battery cell and includes a fastener having high vibration resistance. To do.

  A battery block formed by stacking rectangular battery cells in one direction, end plates disposed at both ends of the battery block in the stacking direction, and a fastener for fastening the battery block in a pressurized state; The fastener is composed of a pair of bind bars, and the bind bars are formed in a shape surrounding the battery block and the end plate, and are installed on the end plate, and further, the end plate It has a notch in the surface which opposes.

  The notch formed in one of the bind bars and the notch formed in the other bind bar are positioned adjacent to each other to form one opening, and the opening is It is preferable that at least one is formed at each of both ends of the battery block in the stacking direction.

  The bind bar includes a side peripheral portion that surrounds the battery block and the end plate and fastens the battery block, and a flange portion that extends from the side peripheral portion, and is located on the output terminal side. It is preferable that the flange portion of the bind bar is provided so as to form an opening exposing the output terminal.

  The battery cell has an outer can on which the output terminal is provided on an upper surface, and the flange portion of the bind bar located on the lower surface side of the battery cell is at least one surface of the battery block on which the bottom surface of the battery cell is located. It is preferable to provide an opening that exposes a portion.

  Moreover, it is good also as a structure provided so that the collar part of the said bind bar located in the lower surface side of the said battery cell may cover one surface of the battery block in which the lower surface of the said battery cell is located.

  It is preferable to provide a cooling device that cools the battery cell in contact with one surface of the battery block on which the lower surface of the battery cell is located.

  Preferably, the cooling device includes a cooling plate having thermal conductivity, and the cooling plate is located between the battery block and the flange portion.

  It is preferable that the bind bar is configured to be able to be locked to the end plate via at least one pin penetrating the bind bar.

  According to the structure of Claim 1, there exists an effect of being able to provide the power supply device provided with the fastener with high vibration tolerance with a simple structure.

  According to the structure of Claim 2, since the opening part for pressing an end plate can be formed largely, there exists an effect that an assembly of a power supply device can be made easy.

  According to the structure of Claim 3, since an output terminal is not covered with a bind bar, there exists an effect that an output terminal can be connected in the state which fastened the battery block with the bind bar.

  According to the configuration of the fourth and fifth aspects, the battery block can be held by the flange portion of the bind bar, and the effect of preventing the positional deviation between the battery block and the bind bar can be achieved.

  According to the structure of Claim 6, there exist effects, such as being able to cool a battery block from the surface on the opposite side to the surface where an output terminal is located.

  According to the structure of Claim 7, there exist effects, such as being able to fix a cooling plate with a collar part.

  According to the structure of Claim 8, there exists an effect of being able to prevent the position shift of an annular bind bar.

It is a perspective view of the power supply device in the embodiment of the present invention. It is the same exploded perspective view. It is sectional drawing of a square battery. It is a perspective view which shows the process of constructing the same annular bind bar. It is a perspective view which shows a mode that the same binding jig is removed. It is a perspective view explaining arrangement | positioning of the cooling plate in this embodiment. FIG. It is a perspective view of the power supply device in other embodiments of the present invention. It is the same exploded perspective view. It is a perspective view which shows other embodiment in which the cooling plate of this invention is located between a battery block and a bind bar. It is the same exploded perspective view. FIG. It is the perspective view seen from the same lower surface. It is the perspective view seen from the lower surface which shows the same form.

  An embodiment of the present invention will be described in detail below with reference to FIGS.

  FIG. 1 is a perspective view of a power supply device 1 according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view thereof. As shown in FIGS. 1 and 2, the power supply device 1 includes a battery block 2 formed by stacking rectangular batteries 21 in one direction, and a fastener 3 for fastening the battery block 2. The battery block 2 includes end plates 23 at both ends in the stacking direction, and the fastener 3 presses the battery block 2 in the stacking direction via the end plates 23. As shown in FIG. 2, the fastener 3 is composed of a pair of annular bind bars 31 installed on the end plate 23. The annular bind bar 31 is formed in an annular shape that is open so as to expose at least a part of the upper and lower surfaces of the battery block 2.

  As shown in FIG. 3, the prismatic battery 21 is a battery cell configured by enclosing a power generation element such as an electrode 212 inside an outer can 211 formed in a thin and substantially rectangular parallelepiped shape. It is a secondary battery such as a nickel metal hydride battery. The outer can 211 is made of a metal having excellent thermal conductivity, and improves the cooling performance of the prismatic battery 21. Examples of the metal having excellent thermal conductivity include aluminum and aluminum alloys. In addition, the rectangular battery 21 has two output terminals 213 protruding from the upper surface of the outer can 211 in the longitudinal direction, which are a positive electrode and a negative electrode, respectively.

  The rectangular batteries 21 constituting the battery block 2 are stacked so that the output terminals 213 are arranged on the upper surface of the battery block 2 so that the output terminals 213 are exposed from the opening of the annular bind bar 31, and the adjacent rectangular batteries 21 are adjacent to each other. The two are connected via a bus bar (not shown). The prismatic batteries 21 are connected in series to increase the output voltage of the power supply device 1. According to this configuration, since the output terminal 213 is exposed from the annular bind bar 31, the square battery 21 can be connected by the bus bar in a state where the battery block 2 is fastened by the annular bind bar 31. Can be improved.

  In addition, in the said embodiment, although each square battery 21 is connected in series, you may connect in parallel. By connecting the prismatic batteries 21 in parallel, the current capacity of the power supply device 1 can be increased. Further, the battery block 2 may be configured by combining parallel connection or series connection according to the target output voltage or current capacity.

  A separator 22 is disposed between the rectangular batteries 21 constituting the battery block 2. The separator 22 is formed of an insulating material and can prevent a short circuit between adjacent rectangular batteries 21. As the insulating material, for example, a resin or plastic having excellent insulating properties and heat resistance is used. The separator 22 is formed so that the prismatic batteries 21 are fitted on both sides, and prevents the adjacent prismatic batteries 21 from being displaced when the prismatic batteries 21 are stacked.

  In the above embodiment, the separator 22 is disposed between the adjacent rectangular batteries 21. However, for example, a tube-shaped insulating material that covers the outer can 211 of the rectangular battery 21 may be provided. it can. In this configuration, since the adjacent rectangular batteries 21 can be insulated by the tubular insulating material thinner than the separator 22, the length of the battery blocks 2 in the stacking direction can be shortened. As this tubular insulating material, for example, a shrink tube, which is an insulating film that thermally shrinks, is known.

  The end plate 23 has a rectangular parallelepiped shape whose outer shape is substantially equal to the outer shape of the rectangular battery 21, and is formed of a metal having a relatively high strength such as aluminum or an aluminum alloy, a hard plastic, or the like. Further, a plurality of positioning holes 231 are formed on the surface of the end plate 23 facing the annular bind bar 31 (in this embodiment, formed at each corner of the end plate 23). Although not shown, the end plate 23 may include a reinforcing rib extending vertically and horizontally on the outer surface in order to increase bending strength.

  The annular bind bar 31 is a bind bar that surrounds the battery block 2 including the end plate 23 in the circumferential direction, and a pair of upper and lower annular bind bars 31 are installed on the end plate 23. The inner diameter of the annular bind bar 31 is formed to be slightly smaller than the circumference before the battery block 2 provided with the end plates 23 at both ends is pressed in the stacking direction. A small hole 311 is formed in the annular bind bar 31 on a surface facing the end plate 23 at a position corresponding to the plurality of positioning holes 231 formed in the end plate 23. The annular bind bar 31 can be positioned by inserting the pin 4 into the H.231.

  4 and 5 are perspective views showing a state in which the annular bind bar 31 is installed on the end plate 23 and the battery block 2 is fastened. When the battery block 2 is fastened by the annular bind bar 31, the end plate 23 provided at both ends of the battery block 2 is pressed from both ends by using the binding jig J, and the battery block 2 is elastically contracted in the stacking direction. At this time, since the battery block 2 is contracted in the stacking direction, the peripheral length of the battery block 2 is smaller than the inner diameter of the annular bind bar 31, and the end plates 23 provided at both ends are annularly provided. The bind bar 31 can be installed. In addition, the annular bind bar 31 is provided with a notch 31A at the center portion of the surface facing the end plate 23 at a position corresponding to the bind jig J so as not to hinder the removal of the bind jig J. .

  Here, it supplements about the structure of 31 A of notches demonstrated in the preceding paragraph. As described above, the pair of annular bind bars 31 are respectively installed on the upper and lower portions of the battery block 2, and hereinafter, the annular bind bar 31 positioned on the upper portion of the battery block 2 is referred to as the first annular bind bar 31a and the battery. The annular bind bar 31 located at the lower part of the block 2 is defined as a second annular bind bar 31b. The first annular bind bar 31a has a notch 31A formed on the surface facing the end plate 23, notched about half of the first annular bind bar 31a from the center of the end plate 23 upward. The second annular bind bar 31b has a notch 31A formed on the surface facing the end plate 23, by cutting out about half of the second annular bind bar 31b from the center of the end plate 23 downward. . The cutout 31A of the first annular bind bar 31a and the cutout 31A of the second annular bind bar 31b are formed at corresponding positions, and the shape of the opening formed by the two cutouts 31A and the binding treatment. The shape of the tool J matches.

  With this configuration, while the battery block 2 is pressed by the binding jig J, the first annular bind bar 31a is placed on the end plate 23 from above the battery block 2, and the second annular bind bar 31b is attached to the battery. Covering from below the block 2, it can be installed on the end plate 23. When the binding jig J is removed, the elastically contracted battery block 2 tries to return to its original size, but the dimensions of the battery block 2 are regulated by the annular bind bar 31 surrounding the battery block 2. Is done. Specifically, in order for the battery block 2 having the end plates 23 at both ends to extend beyond the inner diameter of the annular bind bar 31, it is necessary to elastically deform the annular bind bar 31 that regulates the dimensions. By setting it as such a structure, the battery block 2 can be fastened in the state pressurized by the cyclic | annular bind bar 31 in the lamination direction. At this time, since the annular bind bar 31 and the end plate 23 are positioned via the pins 4, the relative position between the annular bind bar 31 and the end plate 23 is not shifted, and the battery block 2 is securely attached. It can be concluded.

  The annular bind bar 31 is a metal having a strength that hardly deforms under pressure applied when the battery block 2 is fastened so that the battery block 2 can be fastened and fastened with sufficient force in the stacking direction. The plate is preferably formed of a metal plate such as a stainless plate or a steel plate having a sufficient width and thickness, for example.

  In the above embodiment, the pin 4 is inserted into the positioning hole 231 and the annular bind bar 31 is temporarily fixed. However, a screw thread or a screw groove may be provided at the positioning hole 231 and the tip of the pin 4. . According to this configuration, the pin 4 does not come off during temporary fixing, and the power supply device 1 can be easily assembled.

  6 and 7 are diagrams for illustrating the cooling structure of the power supply device of the present embodiment. A flat plate-like cooling plate 51 having excellent thermal conductivity is disposed on the lower surface side of the battery block 2. As described above, since the annular bind bar 31 is formed in an annular shape so as to expose at least a part of the upper surface and the lower surface of the battery block 2, the rectangular battery 21 exposed from the lower surface of the battery block 2 is cooled. Be able to. The cooling plate is made of, for example, a metal plate made of aluminum having excellent thermal conductivity. An insulating heat conductive sheet 53 is disposed between the cooling plate 51 and the battery block 2, and the battery block 2 and the cooling plate 51 are in a thermally coupled state. The heat conductive sheet 53 is formed of, for example, silicon or rubber material, and can efficiently transfer the heat of the battery block 2 to the cooling plate 51 while maintaining the insulation between the battery block 2 and the cooling plate 51. Inside the cooling plate 51, a refrigerant pipe 52 through which an antifreeze coolant passes is disposed. A cooling liquid is supplied to the refrigerant pipe 52 from a cooling mechanism (not shown) so that the cooling liquid circulates in the refrigerant pipe 52, and the cooling plate 51 is cooled by the cooling liquid. Yes. The cooling device 51 is constituted by the cooling plate 51, the heat conductive sheet 53, and the refrigerant pipe 52. With this configuration, one surface of the battery block 2 that is not covered by the annular bind bar 31 (in this embodiment, the battery block 2). ) And the cooling plate 51 can be thermally coupled, and the battery block 2 can be cooled.

  In the above embodiment, an insulating heat conductive sheet is provided. However, for example, in a configuration in which the outer can 211 is formed of a resin or a configuration in which the rectangular battery 21 is covered with a tubular insulating material, a cooling plate is used. 51 and the battery block 2 are insulated by an outer can 211, a tube-shaped insulating material, or the like. Therefore, the cooling plate 51 and the lower surface of the battery block 2 may be in direct contact with each other and thermally coupled. Good.

  Moreover, in the said embodiment, although the cooling device 5 of the structure which cools the cooling plate 51 using a cooling fluid was illustrated, it is not necessary to limit to this structure, For example, the cooling fluid circulating in the refrigerant | coolant piping 52 It is also possible to adopt a known configuration such as a configuration in which the cooling plate 51 is cooled by vaporizing, or a configuration in which the cooling plate 51 is provided with heat radiation fins.

  Further, in the above embodiment, the cooling method using the cooling plate 51 has been exemplified, but a plurality of slit-like openings are formed on the side surface of the annular bind bar 31, and cooling air is introduced from these openings, so that the battery block 2 The structure which cools may be sufficient.

  Thus, in the assembling process, the rectangular battery 21 and the separator 22 are alternately stacked, and the end plate 23 is disposed at both ends to form the battery block 2. Through a binding jig J that presses the end plate 23, the battery block 2 is pressed in the stacking direction to be elastically reduced, and a pair of annular binds are formed from above and below the battery block so as to surround the reduced battery block 2. The bar 31 is installed on the end plate 23. At this time, the positioning hole 231 of the end plate 23 and the small hole 311 of the annular bind bar 31 are positioned to face each other. Then, the pin 4 is inserted into the annular bind bar 31 and the small hole 311 of the end plate 23, and the annular bind bar 31 is locked to the end plate 23 so that the annular bind bar 31 can be temporarily fixed. It has become.

  When the binding jig J is removed, the force that pressurizes the battery block 2 disappears, and the battery block 2 extends to the extent that it matches the inner diameter of the annular bind bar 31, but is surrounded by the annular bind bar 31. , Does not stretch to the original dimensions. Therefore, the battery block 2 fastened by the annular bind bar 31 is pressurized in the stacking direction by the annular bind bar 31. A bus bar is attached to the output terminal 213 of the prismatic battery 21 protruding from the upper surface of the battery block 2, and the prismatic batteries 21 are connected in series. An insulating heat conductive sheet 53 is disposed on the upper surface of the cooling plate 51, and the battery block 2 is disposed on the cooling plate 51 so that the heat transfer 6 conductive sheet 53 and the lower surface of the battery block come into contact with each other.

  Unlike the method of fixing the bind bar to the end plate using a general screw or nut in the power supply device 1 of the above embodiment, the annular bind bar 31 is not fixed only by a fixing member such as a screw or nut. Therefore, for example, there is no possibility that the screw or nut is loosened due to vibration and the annular bind bar 31 is detached, or the force for pressurizing the battery block 2 is not reduced. According to this configuration, the number of assembly steps is small, and it is not necessary to manage torque such as screws, so that production efficiency can be improved.

  Further, since the annular bind bar 31 has a notch formed at a position facing the center of the end plate 23, when the bind jig is removed in the assembly process, the bind jig J and the annular bind bar 31 are separated from each other. The binding jig J can be easily removed without physical interference.

  Furthermore, since it is comprised so that it can fix temporarily using the pin 4, the annular bind bar 31 can be positioned, and it prevents that the annular bind bar 31 is constructed diagonally with respect to the battery block 2. Can do. When the annular bind bar 31 is installed obliquely, the battery block 2 is pressurized with a force stronger than expected, and a load is applied to the annular bind bar 31. In addition, when the battery block 2 is pressurized with a stronger force than expected, the battery block 2 contracts further, so that the relative position between the output terminal 213 and the bus bar is shifted, and the output terminal 213 connected by the bus bar is assumed. There is also a risk that the above load is applied. In the power supply device of the above embodiment, the battery block 2 can be prevented from being pressed with a force stronger than expected by adopting a configuration in which the annular bind bar 31 is positioned in a positioned state.

  FIG.8 and FIG.9 is a perspective view which shows the shape of the cyclic | annular bind bar 32 in another embodiment. Hereinafter, the annular bind bar 32 positioned at the upper part of the battery block 2 is referred to as a first annular bind bar 32a, and the annular bind bar 32 positioned at the lower part of the battery block 2 is referred to as a second annular bind bar 32b. The annular bind bar 32 includes a side peripheral portion 321 that surrounds the battery block 2 and a flange portion 322 that extends from the side peripheral portion 321. The first annular bind bar 32 a that fastens the upper part of the battery block 2 has a flange part 322 formed on the upper part of the side peripheral part 321. Are in contact with each other. Similarly, the second annular bind bar 32b for fastening the lower part of the battery block 2 has a flange part 322 formed in the lower part of the side peripheral part 321. When the second annular bind bar 32b is installed on the end plate 23, the second annular bind bar 32b The collar part 322 comes into contact.

  According to this configuration, the annular bind bar 32 can be positioned via the flange 322 of the annular bind bar 32. Therefore, when the annular bind bar 32 is installed on the end plate 23, it is possible to more reliably prevent the positional displacement of the annular bind bar 32, so that the power supply device 1 can be easily assembled.

  10 to 14 show an embodiment in which the cooling plate 51 is positioned between the battery block 2 and the annular bind bar 32, and the cooling plate 51 is fixed by the flange 322 of the second annular bind bar 32b. In the annular bind bar 32 shown in FIGS. 10 to 13, the second annular bind bar 32 b located on the lower surface side of the battery block 2 has an opening 32 </ b> B that is open from the surface facing the end plate 23 to the bottom surface. Yes. By forming the opening 32B, the refrigerant pipe 52 disposed in the cooling plate 51 can be piped outside in a state where the cooling plate 51 is positioned between the battery block 2 and the annular bind bar 32b. It can be done.

  In the embodiment shown in FIGS. 10 to 14, the flange portion 322 of the second annular bind bar 32 b comes into contact with the lower portion of the cooling plate 51 instead of the lower portion of the battery block 2.

  Furthermore, in the embodiment shown in FIG. 14, the second annular bind bar 32 b is formed in a bottomed box shape, covers the lower surface of the cooling plate 51, and has a shape that supports the lower surface of the cooling plate 51 on the entire surface. In other words, in the embodiment shown in FIG. 14, the flange portion 322 of the second annular bind bar 32 b extends so as to close the lower surface of the battery block 2, and is configured to allow the above-described binding jig J to be inserted. A notch 31 </ b> A for this purpose and an opening 32 </ b> B for configuring the refrigerant pipe 52 to be piped to the outside are formed.

  In the embodiment shown in FIGS. 10 to 14, the cooling plate 51 is fastened by the annular bind bar 32 in a state where the cooling plate 51 is in contact with the lower surface of the battery block 2. The parts and the bind bar can be achieved by the same member, and the cooling plate 51 and the battery block 2 can be modularized. With this configuration, for example, workability can be improved in an assembly process for mounting the power supply device 1 on a vehicle or the like.

  Further, in the configuration of the annular bind bar 32 shown in FIGS. 8 to 14, as described above, the flange portion 322 of the annular bind bar 32 abuts on the battery block 2 or the cooling plate 51, so that the annular bind bar 32 can be more reliably attached. Can be prevented from being displaced. In particular, as the number of prismatic batteries 21 to be stacked increases, the variation in the fastening force due to the displacement of the position of the annular bind bar 32 increases, but by reliably preventing the displacement of the position of the annular bind bar 32, the force is stronger than expected. It is possible to prevent the battery block 2 from being pressurized. In addition, the collar part 322 can also suppress the positional deviation of the stacked rectangular batteries 21 in the vertical direction. In this type of power supply device, it is difficult to flatten the upper and lower surfaces of the battery block 2 due to vertical displacement of the prismatic battery 21 during assembly and variations in dimensions of the outer can 211 during manufacturing. When the lower surface of the battery block 2 is not flat, the adhesion between the cooling plate 51 and the heat conductive sheet 53 and the battery block 2 is deteriorated, so that the prismatic battery 21 cannot be sufficiently cooled or the stacked prismatic batteries 21 are not stacked. There may be a temperature difference. When a temperature difference occurs in the prismatic battery 21 constituting the battery block 2, the capacity of the prismatic battery 21 varies, and there is a possibility that overdischarge or overcharge may occur.

  Further, in the embodiment shown in FIG. 8 and FIG. 9, the flange portion 322 can also suppress the vertical displacement of the stacked rectangular batteries 21, so that the battery block 2 and the heat conductive sheet 53 Adhesion can be improved. In the embodiment shown in FIGS. 10 to 14, the annular bind bar 32 b is held by the cooling plate 51 in contact with the lower surface of the battery block 2 by the annular bind bar 32 b. Thus, the cooling plate 51 is pressed against the lower surface (heat conductive sheet 53) of the battery block 2, and the adhesion between the battery block 2 and the heat conductive sheet 53 can be improved.

  In the above embodiment, a rectangular battery is illustrated as a rectangular parallelepiped battery cell. However, the battery cell used in the present invention is not limited to a rectangular battery, and is formed by covering a power generation element such as an electrode with a laminate film. A rectangular laminated battery or the like may be used. Moreover, in the said embodiment, although the pin 4, the positioning hole 231, and the small hole 311 are formed in multiple numbers, it does not necessarily need to be multiple. For example, in the power supply device 1 in which the number of the rectangular batteries 21 to be stacked is small, the annular bind bar 31 and the annular bind bar 32 are relatively less likely to be misaligned. It is good also as a structure provided with only the positioning hole 231 and the small hole 311. FIG.

  The above power supply apparatus can be used as a vehicle-mounted power supply. As a vehicle equipped with a power supply device, a hybrid vehicle or a plug-in hybrid vehicle driven only by an engine and a motor, or an electric vehicle such as an electric vehicle driven only by a motor can be used and used as a power source for these vehicles. .

  In addition to power supplies for vehicles, backup power supplies that can be mounted on racks of computer servers, backup power supplies for wireless base stations such as mobile phones, power supplies for home and factory storage, street light It can also be used as appropriate for applications such as a power source, a power storage device combined with a solar cell, a backup power source such as a traffic light.

  In the above-described embodiment, in order to explain each component, the output terminal side of the battery cell is the upper surface, and the bottom surface of the outer can is the lower surface. It is not limited. For example, when mounting on the above-described hybrid vehicle or the like, the power supply device 1 may be mounted so that the upper surface of the battery block is directed sideways or downward.

  The present invention is widely applicable to power supply devices.

DESCRIPTION OF SYMBOLS 1 Power supply device 2 Battery block 21 Square battery 211 Exterior can 212 Electrode 213 Output terminal 22 Separator 23 End plate 231 Positioning hole 3 Fastening tool 31 Annular bind bar 31a First annular bind bar 31b Second annular bind bar 311 Small hole 31A Notch 32 annular bind bar 32a first annular bind bar 32b second annular bind bar 321 side peripheral part 322 flange 32B opening 4 pin 5 cooling device 51 cooling plate 52 refrigerant pipe 53 heat conduction sheet J binding jig

Claims (8)

A battery block formed by stacking rectangular battery cells in one direction, end plates disposed at both ends of the battery block in the stacking direction, and a fastener for fastening the battery block in a pressurized state; With
The fastener is composed of a pair of bind bars,
The bind bar is formed in a shape that surrounds the battery block and the end plate, is mounted on the end plate, and further has a notch on a surface facing the end plate. . The power supply device according to claim 1, wherein
The notch formed in one of the bind bars and the notch formed in the other bind bar are positioned adjacent to each other to form one opening,
A power supply device comprising: at least one opening formed at each of both ends of the battery block in the stacking direction. The power supply device according to claim 1 or 2,
The battery cell has an output terminal positioned side by side on the battery block;
The bind bar is composed of a side peripheral portion that surrounds the battery block and the end plate and fastens the battery block, and a flange portion that extends from the side peripheral portion,
The power supply apparatus according to claim 1, wherein a flange portion of the bind bar located on the output terminal side is provided so as to form an opening exposing the output terminal. The power supply device according to claim 3, wherein
The battery cell has an outer can in which the output terminal is provided on an upper surface,
The hook of the bind bar located on the lower surface side of the battery cell is provided so as to form an opening exposing at least a part of one surface of the battery block on which the lower surface of the battery cell is located. apparatus. The power supply device according to claim 3, wherein
The battery cell has an outer can in which the output terminal is provided on an upper surface,
The power supply apparatus according to claim 1, wherein a flange portion of the bind bar located on the lower surface side of the battery cell is provided so as to cover one surface of the battery block on which the lower surface of the battery cell is located. The power supply device according to claim 4 or 5,
A power supply apparatus comprising a cooling device for cooling the battery cell on one surface of the battery block on which a lower surface of the battery cell is located. The power supply device according to claim 6, wherein
The cooling device includes a cooling plate having thermal conductivity,
The power supply device, wherein the cooling plate is located between the battery block and the flange. The power supply device according to any one of claims 1 to 7,
The power supply apparatus according to claim 1, wherein the bind bar is configured to be engageable with the end plate through at least one pin penetrating the bind bar.