JP2006190611A - Power supply device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power supply device, which can be used stably for a long period eliminating failure even in use in an environment receiving very strong vibrations. <P>SOLUTION: The power supply device has a plurality of secondary batteries 10 housed in a holder case 20 by arranging laterally in perpendicular posture with a sealing plate 12 having an opening part of a safety valve at the upper part, and by connecting in series the adjoining secondary batteries 10 by a lead plate 30 connected to the outer package can 11 and the sealing plate 12. The holder case 20 has a first insulating plate 21 arranged below the outer package can 11, a second insulating plate 22 arranged on the sealing plate 12, and a connecting implement 23 which combines the first insulating plate 21 and the second insulating plate 22 so as to clip the secondary batteries 10. The power supply device has a plurality of secondary batteries 10 interposed between the first insulating plate 21 and the second insulating plate 22 in a vertical direction by the connecting implement 23 combining the first insulating plate 21 and the second insulating plate 22. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a power supply device in which a plurality of secondary batteries are connected in series with a lead plate and arranged side by side in a vertical posture, and more particularly, to a power supply device that is optimally mounted on a vehicle and drives a driving motor. .

  In a power supply apparatus in which a plurality of secondary batteries are connected in series, the secondary batteries are connected in series with a lead plate. In a conventional power supply device for a vehicle, a plurality of secondary batteries are linearly connected in series to form a battery module, and the plurality of battery modules are placed in a case and connected in series with a bus bar.

In the power supply device having this structure, the elongated battery module is housed in the case in a horizontal posture. Since the secondary battery in this posture is housed in the case in a tilted posture, the electrolyte may be discharged when the safety valve opens. When the electrolytic solution is discharged, the battery has a reduced performance and cannot be used. This problem can be solved by storing all the batteries in a vertical posture with the sealing plate positioned on top. The present applicant has developed a battery pack for storing a plurality of secondary batteries in a holder case in a vertical posture. (See Patent Document 1)
JP 2002-15716 A

  The battery pack described in Patent Document 1 has been developed for the power source of electric tools. As shown in FIG. 1, the battery pack stores a plurality of secondary batteries 10 in a holder case 20 in a vertical posture. The adjacent secondary batteries 10 are connected in series by a lead plate 30. Since all the secondary batteries 10 face upward in this battery pack, it is possible to prevent the electrolyte from leaking when the safety valve is opened. Moreover, since all the secondary batteries 10 are arranged in the same direction, careless mistakes during assembly can be prevented.

  However, even if the battery pack of this structure is a structure suitable for an electric power tool, there is a drawback that the lead plate is likely to be damaged when used in an environment subject to severe vibration such as a vehicle. . In addition, since the vehicular power supply device uses a secondary battery having a large capacity and a small internal resistance, there is a drawback that an extremely large short-circuit current flows when the lead plate is detached and short-circuited.

  The present invention was developed for the purpose of solving such drawbacks, and an important object of the present invention is to use it in an environment subject to extremely severe vibrations, to reduce failures, and to stably operate for a long time. The object is to provide a power supply that can be used.

The power supply device of the present invention has the following configuration in order to achieve the above-described object.
The power supply device arranges a plurality of secondary batteries 10 side by side in a vertical posture in which a sealing plate 12 having a safety valve opening is positioned at the top, and connects the adjacent secondary batteries 10 to the outer can 11 and the sealing plate 12. The lead plates 30 are connected in series and are accommodated in the holder case 20. The holder case 20 is disposed below the outer can 11 and has a first insulating plate 21 on which the secondary battery 10 is placed, and a sealing plate 12 disposed between the upper end and the secondary battery 10 from above. A second insulating plate 22 that is attached, and a connector 23 that connects the first insulating plate 21 and the second insulating plate 22 so as to sandwich the secondary battery 10 therebetween. In the power supply device, the connector 23 connects the first insulating plate 21 and the second insulating plate 22, and the plurality of secondary batteries 10 are sandwiched between the first insulating plate 21 and the second insulating plate 22 in the vertical direction. Are arranged.

  In the power supply device of the present invention, the first insulating plate 21 is made of plastic, and a fitting unevenness 24 for fitting and arranging the secondary battery 10 in a fixed position can be integrally formed on the upper surface thereof. . In the power supply device of the present invention, the second insulating plate 22 is made of plastic, and the lower surface of the second insulating plate 22 is integrally formed with the fitting unevenness 25 for fitting and arranging the secondary battery 10 in a fixed position. Can do. Furthermore, in the power supply device of the present invention, the connector 23 can be a screw.

  In the power supply device of the present invention, the lead plate 30 is connected to the outer can connecting portion 31 having a shape along the outer periphery of the upper end portion of the outer can 11 of the secondary battery 10, and the secondary battery 10 adjacent to the outer can connecting portion 31. It can be configured with a sealing plate connecting portion 32 protruding toward the sealing plate 12. The outer can connection part 31 can be ring-shaped or can be ring-shaped with a part removed. Moreover, the outer can connection part 31 can be formed in a cylindrical shape into which the upper end of the outer can 11 is inserted. The sealing plate connecting portion 32 can be provided with a through hole 33 into which the convex electrode 13 of the sealing plate 12 is inserted.

  The power supply device of the present invention has the advantage that it can be used stably for a long period of time even if it is used in an environment subject to extremely severe vibration. In the power supply device of the present invention, a plurality of secondary batteries are arranged side by side in a vertical posture in which a sealing plate having an opening of a safety valve is positioned on the upper side, and adjacent secondary batteries are connected in series with a lead plate. The holder case has a structure in which the first insulating plate disposed under the outer can and the second insulating plate disposed on the sealing plate are connected by a connecting tool. This is because a plurality of secondary batteries are disposed so as to be vertically sandwiched between the first insulating plate and the second insulating plate. The power supply device with this structure is used in an environment subject to extremely severe vibration because a plurality of secondary batteries arranged in a vertical posture are sandwiched and fixed between the first insulating plate and the second insulating plate from above and below. However, it is possible to minimize the adverse effects such as the lead plate coming off. Therefore, it can be used stably over a long period of time while reducing failures.

  Further, the power supply device of the present invention houses the secondary battery in the case in a vertical posture in which the sealing plate having the opening portion of the safety valve is positioned at the top, so that when the safety valve opens, the electrolyte is discharged from the opening portion. Gas or the like can be exhausted from the opening at the top of the secondary battery. For this reason, after the safety valve is closed, it is possible to effectively prevent an adverse effect that the performance of the battery deteriorates and cannot be used.

  Embodiments of the present invention will be described below with reference to the drawings. However, the embodiments described below exemplify a power supply device for embodying the technical idea of the present invention, and the present invention does not specify the power supply device as follows.

  Further, in this specification, in order to facilitate understanding of the scope of claims, numbers corresponding to the members shown in the examples are indicated in the “claims” and “means for solving problems” sections. It is added to the members. However, the members shown in the claims are not limited to the members in the embodiments.

  The power supply device shown in FIGS. 2 to 7 includes a plurality of secondary batteries 10 arranged side by side in a vertical posture in which a sealing plate 12 having an opening of a safety valve is positioned on the upper side, and adjacent secondary batteries 10 are arranged in an outer can. 11 and the lead plate 30 connected to the sealing plate 12 are connected in series and are accommodated in the holder case 20.

  The secondary battery 10 is a cylindrical battery such as a nickel-hydrogen battery, a lithium ion secondary battery, or a nickel-cadmium battery. In the secondary battery 10, a positive and negative electrode plate (not shown) laminated via a separator (not shown) is put in a battery case in which the opening of the outer can 11 is closed with a sealing plate 12. The electrolyte is filled. The outer can 11 and the sealing plate 12 are metal plates. The outer can 11 is manufactured by press-molding a metal plate into a cylindrical shape with a bottom. The sealing plate 12 is provided with a convex electrode 13 in the center. Further, the sealing plate 12 is provided with an opening (not shown) of a safety valve. The safety valve built in the sealing plate 12 opens when the internal pressure of the battery case becomes higher than the set pressure, and prevents the battery case from being destroyed by an abnormal internal pressure. When the safety valve is opened, gas is exhausted from the inside of the battery case, and the internal pressure is reduced. In a normal use state, the safety valve is closed and the battery case is hermetically sealed. One electrode plate housed inside the outer can 11 is connected to the outer can 11, and the other electrode plate is connected to the sealing plate 12. Furthermore, the outer can 11 has an end portion of the opening that is caulked to fix the sealing plate 12 in an airtight manner. The sealing plate 12 is sandwiched between the caulked portions of the outer can 11 via a gasket and fixed in an airtight manner. The gasket is an insulating rubber-like elastic body that insulates the sealing plate 12 and the outer can 11 and airtightly closes the gap between the sealing plate 12 and the outer can 11. The outer can 11 is provided with a groove along the periphery at the end where the sealing plate 12 is provided in order to crimp the end of the opening and sandwich the sealing plate 12. The secondary battery 10 has a sealing plate 12 as a first electrode and an outer can 11 as a second electrode, and have different polarities. The nickel-hydrogen battery uses a first electrode as a positive electrode and a second electrode as a negative electrode. However, in the secondary battery, the first electrode can be a negative electrode and the second electrode can be a positive electrode.

  The secondary battery 10 is stored in the holder case 20 in a vertical posture with the sealing plate 12 facing up. The secondary battery 10 exhausts gas or the like from the opening of the sealing plate 12 when the safety valve is opened. Since the safety valve exhausts from the upper part of the battery case, the electrolyte filled to immerse the electrode is not discharged. This is because the electrolyte solution is not filled so as to completely fill the battery case. Therefore, when the internal pressure of the battery case rises and the safety valve opens, the air or gas accumulated in the upper part of the battery case is exhausted to reduce the internal pressure. When the internal pressure decreases and the safety valve is closed, the secondary battery 10 that does not discharge the electrolyte is in a state where it can be charged and discharged again.

  In the illustrated power supply apparatus, the secondary battery 10 is a cylindrical battery, but may be a square battery. The secondary battery 10 is provided with a cooling gap between the secondary battery 10 and the adjacent secondary battery 10 in a vertical posture. The holder case 20 accommodates the secondary batteries 10 arranged in a row as shown in FIG. 8, or arranged in a plurality of rows as shown in FIG. 9, or as shown in FIG. Are arranged in the holder case 20 so as to be positioned.

  In the secondary battery 10, the convex electrode 13 is provided on the sealing plate 12, and the bottom surface of the outer can 11 is a horizontal plane. Therefore, the secondary battery 10 is accommodated in the holder case 20 in a vertical posture with the convex electrode 13 of the sealing plate 12 facing up and the bottom of the outer can 11 facing down. Since the bottom surface of the outer can 11 is a horizontal surface, the outer can 11 can be placed on the first insulating plate 21 which is the lower holder case 20 and can be stably placed in a vertical posture.

  Adjacent secondary batteries 10 are connected in series by a lead plate 30. The lead plate 30 of the power supply device shown in FIGS. 2, 4, 5 and 7 is shown in the perspective views of FIGS. The lead plate 30 is manufactured by cutting a metal plate and then pressing it into the shape shown in the figure. The metal plate is a plate obtained by plating a surface of a metal plate such as an iron plate or a copper plate with nickel, copper, silver, Shinchu or the like, or a nickel plate. The lead plate 30 protrudes toward the sealing plate 12 of the adjacent secondary battery 10 from the outer can connection portion 31 having a shape along the outer periphery of the upper end portion of the outer can 11 of the secondary battery 10. And a sealing plate connecting portion 32.

  In the lead plate 30 of FIGS. 2 and 11, the outer can connecting portion 31 has a ring shape. The outer can connecting part 31 of the lead plate 30 shown in FIGS. 4 and 12 has a ring shape with a part cut away. The outer can connection part 31 of these lead plates 30 is connected so as to cover the outer side of the crimping ridge 14 at the upper end of the outer can 11. These outer can connection portions 31 have a groove-shaped metal plate that can be elastically deformed so as to be fitted to the outer side of the caulking ridge 14 at the upper end edge of the outer can 11. The outer can connecting portion 31 is formed by elastically deforming a metal plate, fitting the caulking ridge 14 in the groove, and connecting the outer can connecting portion 31 of the lead plate 30 in an electrically connected state to the outer can 11. . For this reason, the outer can connection part 31 having this shape can be electrically connected to the outer can 11 without being welded to the outer can 11. However, the outer can connection part 31 can be welded to the outer can 11 in a state where the crimping ridges 14 are inserted into the outer can connection part 31, and the electric connection can be more reliably performed.

  The outer can connecting portion 31 of the lead plate 30 shown in FIGS. 5 and 13 is formed by pressing a metal plate into a cylindrical shape into which the upper end of the outer can 11 is inserted. The outer can connecting portion 31 into which the cylindrical battery is inserted has a cylindrical shape. Furthermore, the cylindrical outer can connecting portion 31 is provided with a flange portion 31A protruding inward on the upper end surface. However, the outer can connection part 31 in FIGS. 7 and 14 has a cylindrical shape with a part removed. The cylindrical outer can connecting portion 31 has an inner diameter equal to the outer diameter of the outer can 11, is in close contact with the surface of the outer can 11, and is connected to the outer can 11 in a state of being electrically connected. This structure can reliably connect the lead plate 30 to the outer can 11 by welding.

  The sealing plate connecting portion 32 projects from the outer can connecting portion 31 in the radial direction and is connected to the sealing plate 12. The sealing plate connecting portion 32 in the figure is provided with a through hole 33 into which the convex electrode 13 of the sealing plate 12 is inserted. With the sealing plate connecting portion 32 having this structure, the lead plate 30 can be disposed at a fixed position by inserting the convex electrode 13 into the through hole 33. For this reason, there exists the characteristic which can connect the sealing board connection part 32 to the fixed position of the sealing board 12 correctly. The sealing plate connecting portion 32 disposed around the convex electrode 13 is welded and electrically connected to the sealing plate 12, or pressed by the second insulating plate 22 and electrically connected to the sealing plate 12. However, the sealing plate connecting portion can also be connected to the convex electrode by welding.

  The sealing plate connecting portion 32 is bent so that a step can be formed between the tip portion 32A connected to the sealing plate 12 and the intermediate portion 32B connected to the outer can connecting portion 31. The sealing plate connecting part 32 is bent so that the intermediate part 32B is positioned above the tip part 32A. The lead plate 30 shown in FIGS. 12 and 14 prevents the intermediate portion 32B from coming into contact with the caulking ridge 14 in a state where the tip portion 32A is connected to the sealing plate 12. These lead plates 30 are provided with a cut portion 34 in the outer can connecting portion 31, and a sealing plate connecting portion 32 is provided in the cut portion 34. According to this structure, since the sealing plate connection part 32 does not contact the outer can connection part 31, the overall height can be lowered. The lead plate 30 of FIGS. 11 and 13 prevents the intermediate portion 32B from coming into contact with the outer can connecting portion 31 connected to the caulking ridge 14 in a state where the distal end portion 32A is connected to the sealing plate 12. Since the intermediate portion 32B of the lead plate 30 having this structure is disposed so as to straddle the outer can connecting portion 31 in a non-contact state, it is necessary to dispose the sealing plate connecting portion 32 in the excision portion provided at a specific position. There is no. For this reason, there is no restriction | limiting in the arrangement | sequence of the secondary battery 10 connected with the lead board 30, and the secondary battery 10 arranged in a non-linear form can be connected in series.

  An insulating material 40 such as plastic or paper is disposed on the lower surface of the intermediate portion 32B. The plastic insulating material 40 is fitted to the intermediate portion 32B or the outer can connecting portion 31 and coupled to the lead plate 30. The insulating material 40 fitted to the intermediate part 32B is disposed on the lower surface of the intermediate part 32B and the outer surface of the step part 32C, and the intermediate part 32B and the step part 32C are connected to the outer can connecting part 31 and the caulking ridge. 14 is prevented from touching. The structure in which the insulating material 40 is disposed here can surely prevent the intermediate portion 32B or the stepped portion 32C from coming into contact with the crimping ridge 14 or the outer can connecting portion 31 and short-circuiting. Furthermore, although not shown, the insulating material to be fitted to the outer can connecting portion can cover a part or the entire surface of the outer can connecting portion as a ring-shaped or partly cut ring-shaped insulating cap. . The insulating material, which is an insulating cap, is attached to the upper part of the secondary battery to which the outer can connecting part is welded, and prevents the intermediate part and the step part from coming into contact with the outer can connecting part and the caulking ridge to cause a short circuit. .

  The holder case 20 is disposed below the outer can 11 and has a first insulating plate 21 on which the secondary battery 10 is placed, and a sealing plate 12 disposed between the upper end and the secondary battery 10 from above. A second insulating plate 22 that is attached, and a connector 23 that connects the first insulating plate 21 and the second insulating plate 22 so as to sandwich the secondary battery 10 therebetween. The holder case 20 connects the first insulating plate 21 and the second insulating plate 22 with a connector 23 so that the plurality of secondary batteries 10 are vertically arranged between the first insulating plate 21 and the second insulating plate 22. They are sandwiched and arranged.

  The first insulating plate 21 is made of plastic, and on the upper surface thereof, a fitting unevenness 24 for fitting and arranging the secondary battery 10 in a fixed position is integrally formed and provided. The first insulating plate 21 in FIG. 2 to FIG. 7 is provided with a convex portion 24A around the secondary battery 10, and the secondary battery 10 is disposed inside the convex portion 24A. Place in position.

  The second insulating plate 22 is also made of plastic, and the lower surface of the second insulating plate 22 is fitted with the secondary battery 10 and integrally provided with a fitting unevenness 25 arranged at a fixed position. The fitting unevenness 25 of the second insulating plate 22 presses the lead plate 30 against the upper surface of the secondary battery 10. In particular, the front end portion 32 </ b> A of the sealing plate connecting portion 32 of the lead plate 30 is pressed against the upper surface of the sealing plate 12. The secondary battery 10 has two lead plates 30 connected to its upper end. One lead plate 30 connects the outer can connecting portion 31 to the outer side of the outer can 11, and the other lead plate 30 connects the tip 32 </ b> A of the sealing plate connecting portion 32 to the convex electrode 13 of the sealing plate 12 or the periphery thereof. is doing. In order to insulate the two lead plates 30 from each other, the fitting unevenness 25 of the second insulating plate 22 is provided with an insulating convex portion 25A that enters between the outer can connecting portion 31 and the sealing plate connecting portion 32. . 25 A of this insulation convex part is inserted in the clearance gap between the sealing board connection part 32 and the exterior can connection part 31, and insulates the two lead plates 30, and also prevents the position shift of the secondary battery 10. The secondary battery 10 is arranged at a fixed position. Further, as shown in FIG. 6, the fitting unevenness 25 of the second insulating plate 22 is provided with a protruding portion 25 </ b> B inserted between adjacent secondary batteries 10, and the protruding portion 25 </ b> B defines the secondary battery 10. It can also be placed in position. The fitting unevenness 25 of the second insulating plate 22 is formed into a shape that is fitted to the upper end of the secondary battery 10 that fixes the pair of lead plates 30, and is further fitted between the secondary batteries 10. The protrusion 25B is formed into a certain shape. However, the fitting unevenness 25 fitted to the upper end surface of the secondary battery 10 is provided with a fluid passage (not shown) discharged from the safety valve of the sealing plate 12.

  In the illustrated power supply apparatus, the first insulating plate 21 and the second insulating plate 22 of the holder case 20 are formed into a plate shape. The holder case 20 having this structure blows air between the first insulating plate 21 and the second insulating plate 22 to efficiently cool the secondary battery 10. However, although not shown, the holder case may be a box shape in which peripheral walls are formed on the first insulating plate and the second insulating plate. The holder case can store the secondary battery in a closed interior. This holder case is provided with a ventilation opening, and forcibly blows air inside to cool the secondary battery.

  The connector 23 connects the first insulating plate 21 and the second insulating plate 22 with the first insulating plate 21 and the second insulating plate 22 sandwiching the secondary battery 10 from above and below. In the illustrated power supply apparatus, the connector 23 is a screw 23A and a nut 23B. In this connector 23, screws 23A are inserted into through holes (not shown) of the first insulating plate 21 and the second insulating plate 22, and nuts 23B are screwed into the screws 23A so that the first insulating plate 21 and the second insulating plate are inserted. 22 is connected. The connecting tool 23 can adjust the pressing force with which the first insulating plate 21 and the second insulating plate 22 sandwich the secondary battery 10 vertically by adjusting the screwing amount of the nut 23B. However, the power supply device of the present invention does not specify the coupling tool as a screw and a nut. For example, the first insulating plate and the second insulating plate can be connected in a state in which the secondary battery is sandwiched, such as a nail fitting structure. Further, the first insulating plate and the second insulating plate can be reinforced with a metal plate in order to improve the strength, and a structure in which a plastic and a metal plate are laminated in two layers can be employed. In that case, by making the surface on the side in contact with the secondary battery a plastic layer, the plate can be reinforced while insulating the metal plate and the secondary battery. Moreover, it can also be set as the structure of three or more layers which laminated the metal plate with the plastics.

  The power supply apparatus of the present invention is preferably mounted on a vehicle and supplies power to a motor for traveling. This power supply device is mounted on the vehicle in a posture in which the secondary battery is set up vertically, and prevents the electrolyte from being discharged when the safety valve opens.

It is sectional drawing which shows an example of the conventional battery pack. It is a vertical sectional view of a power supply device according to an embodiment of the present invention. It is the sectional view on the AA line of the power supply device shown in FIG. It is a vertical sectional view of a power supply device according to another embodiment of the present invention. It is a vertical sectional view of a power supply device according to another embodiment of the present invention. It is AA sectional view taken on the line of the power supply device shown in FIG. It is a vertical sectional view of a power supply device according to another embodiment of the present invention. It is a top view which shows an example which accommodates a some secondary battery in a holder case. It is a top view which shows another example which accommodates a some secondary battery in a holder case. It is a top view which shows another example which accommodates a some secondary battery in a holder case. FIG. 3 is a perspective view of a lead plate of the power supply device shown in FIG. 2. It is a perspective view of the lead board of the power supply device shown in FIG. FIG. 6 is a perspective view of a lead plate of the power supply device shown in FIG. 5. It is a perspective view of the lead board of the power supply device shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Secondary battery 11 ... Exterior can 12 ... Sealing plate 13 ... Convex part electrode 14 ... Caulking protrusion 20 ... Holder case 21 ... 1st insulation plate 22 ... 2nd insulation plate 23 ... Connection tool 23A ... Screw
23B ... Nut 24 ... Fitting unevenness 24A ... Convex portion 25 ... Fitting unevenness 25A ... Insulating convex portion
25B ... Projection part 30 ... Lead plate 31 ... Exterior can connection part 31A ... Ridge part 32 ... Sealing plate connection part 32A ... Tip part
32B ... Intermediate part
32C ... Step part 33 ... Through hole 34 ... Removal part 40 ... Insulating material

Claims (8)

A plurality of secondary batteries (10) are arranged side by side in a vertical posture with the sealing plate (12) having the opening of the safety valve positioned at the top, and the adjacent secondary battery (10) is placed in the outer can (11) and the sealing plate A power supply device connected in series with a lead plate (30) connected to (12) and housed in a holder case (20),
The holder case (20) is disposed below the outer can (11) and disposed on the first insulating plate (21) on which the secondary battery (10) is placed and the sealing plate (12). The second insulating plate (22) sandwiching the secondary battery (10) from the upper end, the first insulating plate (21) and the second insulating plate (22) sandwiching the secondary battery (10) A connector (23) for connecting to the state
A connector (23) connects the first insulating plate (21) and the second insulating plate (22), and a plurality of secondary batteries (10) are connected to the first insulating plate (21) and the second insulating plate (22). A power supply device that is sandwiched between and disposed in the vertical direction.   The first insulating plate (21) is made of plastic, and the upper surface thereof is integrally formed with a fitting unevenness (24) for fitting and arranging the secondary battery (10) in a fixed position. Item 4. The power supply device according to Item 1.   The second insulating plate (22) is made of plastic, and a lower surface of the second insulating plate (22) is integrally formed with a fitting unevenness (25) for fitting and arranging the secondary battery (10) in a fixed position. Item 4. The power supply device according to Item 1.   The power supply device according to claim 1, wherein the connector (23) is a screw.   The lead plate (30) has an outer can connecting portion (31) shaped along the outer periphery of the upper end of the outer can (11) of the secondary battery (10), and a secondary adjacent to the outer can connecting portion (31). The power supply device according to claim 1, further comprising a sealing plate connecting portion (32) protruding toward the sealing plate (12) of the battery (10), wherein the outer can connecting portion (31) has a ring shape.   The lead plate (30) has an outer can connecting portion (31) shaped along the outer periphery of the upper end of the outer can (11) of the secondary battery (10), and a secondary adjacent to the outer can connecting portion (31). It is comprised from the sealing board connection part (32) which protrudes toward the sealing board (12) of a battery (10), and an exterior can connection part (31) is a ring shape which partly cut off. Power supply.   The lead plate (30) has an outer can connecting portion (31) shaped along the outer periphery of the upper end of the outer can (11) of the secondary battery (10), and a secondary adjacent to the outer can connecting portion (31). A sealing plate connecting portion (32) protruding toward the sealing plate (12) of the battery (10), and the outer can connecting portion (31) is a cylindrical shape for inserting the upper end portion of the outer can (11). Item 4. The power supply device according to Item 1. The lead plate (30) has an outer can connecting portion (31) shaped along the outer periphery of the upper end of the outer can (11) of the secondary battery (10), and a secondary adjacent to the outer can connecting portion (31). It consists of a sealing plate connection part (32) protruding toward the sealing plate (12) of the battery (10), and the sealing plate connection part (32) inserts the convex electrode (13) of the sealing plate (12). The power supply device according to claim 1, further comprising a through hole (33).

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