JP2008130490A - Connecting member, and electric power unit provided with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric power unit equipped with a connecting member capable of decreasing the load, exerted by a fixed portion between a connecting section and a terminal piece, and suppressing the poor connection. <P>SOLUTION: This electric power unit 1 is provided with a battery assembly 2, measuring means, and the connecting member 9. The battery assembly 2 is provided with a plurality of batteries 4. The battery 4 is provided with positive electrodes 6 and negative electrodes 7. The positive electrode 6 and the negative electrode 7, adjacent to each other, are connected through the connecting member 9. The connecting member 9 is provided with a conductive connecting section 10 and a terminal piece 15. In the connecting member 9, the terminal piece 15 contacts an electrode-side surface of the connecting section 10 at a contacting surface thereof, and a connecting surface of the terminal piece 15 is provided to erect, from an electrode-opposite-side surface of the connecting section 10, with a hook section of the connecting surface abutting against the electrode-opposite-side surface of the connecting section 10. The terminal piece 15 is attached to the connecting section 10. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention includes, for example, a connection member obtained by connecting a plurality of batteries in series and used for a hybrid vehicle or an electric vehicle that can be driven by the power of both an internal combustion engine and an electric motor, and the connection member. The present invention relates to a power supply device.

  A power supply device is mounted on a hybrid vehicle, an electric vehicle, or the like that can travel with the power of both the internal combustion engine and the electric motor. The power supply device includes a plurality of batteries, measurement means, and a connection member. The measuring means measures the potential difference between the positive electrode and the negative electrode of each battery to measure the remaining amount of the plurality of batteries and the remaining amount of the battery assembly including the plurality of batteries. . The connecting member connects the positive electrode of one of the batteries adjacent to each other and the negative electrode of the other battery to connect a plurality of batteries in the battery assembly in series and is connected to the measuring means. To connect the battery assembly and the measuring means.

  Conventionally, as the connection member described above, a connection portion that connects the positive electrode and the negative electrode of each battery adjacent to each other and a terminal piece that is attached to the connection portion and connects to the measurement means have been proposed.

  When fixing the connecting portion and the terminal piece as described above, as shown in Patent Document 1 or the like, as the connecting member described above, a terminal piece formed on an L-shaped flat plate as viewed from the side and the terminal piece And a flat circuit body formed in a required circuit shape to which is attached.

The connection member having the above-described configuration is attached such that one end of the terminal piece in the longitudinal direction is overlapped in parallel with the surface of the flat circuit body, and the other end is erected from the surface of the flat circuit body. And the end of the terminal piece piled up in parallel with the surface of the flat circuit body is welded and fixed to the required position of the flat circuit body.
JP 2004-104946 A

  In the conventional connecting member described above, one end of the terminal piece overlapped in parallel with the surface of the flat circuit body is fixed to a required position of the flat circuit portion by welding, and the terminal piece is attached to the flat circuit body. That is, the planes of both the surface of the flat circuit body and the one end of the terminal piece that are overlapped in parallel with the surface of the flat circuit body are fixed by welding. For this reason, when a load is applied in a direction in which both the flat circuit body and the terminal piece are separated from the fixed portion between the flat circuit body and the terminal piece, the load applied to the fixed portion increases, and the fixed portion is There was a risk of peeling.

  Accordingly, an object of the present invention is to reduce a load on a fixing portion where the connection portion and the terminal piece are fixed by welding or the like, and to suppress a connection failure between the connection portion and the terminal piece. An object of the present invention is to provide a power supply device including a connecting member for connecting a body and a measuring means.

  In order to solve the above-mentioned problems and achieve the object, the invention described in claim 1 is a connection part for connecting a positive electrode of one battery adjacent to each other and a negative electrode of another battery of the battery assembly. And a connecting member provided with a measuring means for detecting a voltage attached to the connecting part, wherein the terminal piece is fixed to one surface of the connecting part, A substantially L-shaped plate member having a connection surface bent from the fixing surface and extending to the other surface side of the connection portion, and abuts the other surface of the connection portion on the connection surface A catch portion is provided.

  According to a second aspect of the present invention, in the first aspect of the invention, the connection surface includes a bent portion that is bent from the fixing surface and a wide portion that is formed wider than the width of the bent portion. And the connecting portion has a passage portion that is wider than the width of the bent portion and narrower than the width of the wide portion at a position where the terminal piece of the connecting portion straddles and passes the bent portion. And the surface of the wide portion closer to the bent portion is in contact with the side portion of the through portion to form the hook portion.

  According to a third aspect of the present invention, in the first aspect of the present invention, the connection surface includes a bent portion that bends from the fixing surface and an abutment projecting from the bent portion toward the battery assembly. It has a piece, and the surface near the fixed surface of the contact piece is in contact with the other surface of the connecting portion to form the catching portion.

  The invention described in claim 4 is the invention described in claim 1, wherein the connection surface is bent from the fixing surface and the second bent portion is bent from the bent portion toward the battery assembly. And a third bent portion erected from the second bent portion, and the surface of the second bent portion close to the bent portion is in contact with the other surface of the connecting portion to It is characterized by that.

  In order to solve the above problems and achieve the object, the invention described in claim 5 includes a battery assembly including a plurality of batteries each having a positive electrode at one end and a negative electrode at the other end, and the battery assembly. In the power supply device comprising: a measuring means for measuring a potential difference between a positive electrode and a negative electrode of each battery constituting the battery; and a connecting member that connects the battery assembly and the measuring means. The connecting member according to any one of claims 1 to 4 is provided as a member.

  According to the invention described in claim 1, the terminal piece includes a fixing surface that is fixed to one surface of the connection portion, and a connection surface that is bent from the fixing surface and extends to the other surface side of the connection portion. In addition to the L-shaped plate member, the connection surface is provided with a hook portion that comes into contact with the other surface of the connection portion. For this reason, the load in the direction orthogonal to the connecting portion can be received by the hooking portion provided on the connecting surface of the terminal piece, and the load on the fixing portion of the fixing surface fixed to one surface of the connecting portion is reduced. can do. Therefore, the connection portion and the terminal piece can be securely fixed.

  According to the invention described in claim 2, the connection surface has a bent portion bent from the fixing surface and a wide portion wider than the width of the bent portion, and the surface near the bent portion of the wide portion is connected. The terminal piece of the part is cut out at the position where the terminal piece straddles, and a hook part is formed by contacting the side part of the through part through which the bent part is wider than the bent part and narrower than the wide part. . For this reason, the surface close to the bent portion of the wide portion of the connection surface that contacts the side portion of the through portion of the connection portion forms a hook portion that contacts the other surface of the connection portion, so that it is orthogonal to the connection portion. The load in the direction in which the connection portion is bent can be received by the surface near the bent portion of the connecting portion, and the load on the fixing portion of the fixing surface fixed to one surface of the connecting portion can be reduced. Therefore, the connection portion and the terminal piece can be securely fixed.

  According to the invention described in claim 3, the connection surface has a bent portion that is bent from the fixing surface and a surface near the fixing surface of the contact piece that protrudes from the bent portion toward the battery assembly. A hook portion is formed in contact with the other surface. For this reason, since the surface of the bent portion closer to the fixing surface of the contact piece forms a hook portion that contacts the other surface of the connecting portion, a load perpendicular to the connecting portion is applied to the bent portion. It can be received by the surface near the fixing surface of the piece, and the load on the fixing portion of the fixing surface fixed to one surface of the connecting portion can be reduced. Therefore, the connection portion and the terminal piece can be securely fixed.

  According to the invention described in claim 4, the connection surface is erected from the bent portion bent from the fixing surface, the second bent portion bent from the bent portion toward the battery assembly, and the second bent portion. The surface of the second bent portion near the bent portion is in contact with the other surface of the connecting portion to form a hook portion. For this reason, the surface of the connecting surface near the bent portion of the second bent portion forms a hook portion that comes into contact with the other surface of the connecting portion. It can be received by the surface near the bent portion of the two bent portions, and the load on the fixing portion of the fixing surface fixed to one surface of the connecting portion can be reduced. Therefore, the connection portion and the terminal piece can be securely fixed.

  According to the invention described in claim 5, the power supply device includes the measuring means provided with the connecting member according to any one of claims 1 to 4. For this reason, when the load of the direction orthogonal to a connection part is applied, a connection part and a terminal piece can be fixed reliably by reducing the load to the adhering location of a connection part and a terminal piece. That is, by connecting the battery assembly and the measuring means with a connection member that suppresses connection failure between the connection portion and the terminal piece, the potential difference between the positive electrode and the negative electrode of each battery of the battery assembly is reliably ensured. Can be measured.

  As described above, according to the invention described in claim 1, by receiving a load in a direction orthogonal to the connection portion at the hook portion provided on the connection surface of the terminal piece, It is possible to reduce the load on the fixing portion of the fixed fixing surface, and it is possible to reliably fix the connection portion and the terminal piece. Therefore, connection failure between the connection portion and the terminal piece can be suppressed.

  According to the second aspect of the present invention, the surface near the bent portion of the connecting portion that contacts the side portion of the through portion of the connecting portion forms the hook portion that contacts the other surface of the connecting portion. Therefore, the load in the direction orthogonal to the connecting portion can be received by the surface of the connecting portion near the bent portion. Therefore, it is possible to reduce the load on the fixing portion of the fixing surface fixed to one surface of the connecting portion, and to securely fix the connecting portion and the terminal piece. Therefore, connection failure between the connection portion and the terminal piece can be suppressed.

  According to the third aspect of the present invention, the surface of the bent portion closer to the fixing surface of the contact piece forms the hook portion that contacts the other surface of the connection portion, and is thus orthogonal to the connection portion. The load in the direction can be received on the surface near the fixing surface of the contact piece of the bent portion. Therefore, it is possible to reduce the load on the fixing portion of the fixing surface fixed to one surface of the connecting portion, and to securely fix the connecting portion and the terminal piece. Therefore, connection failure between the connection portion and the terminal piece can be suppressed.

  According to the fourth aspect of the present invention, the surface of the connection surface near the bent portion of the second bent portion forms a hook portion that comes into contact with the other surface of the connection portion. The load in the direction to be applied can be received on the surface of the connection surface near the bent portion of the second bent portion. Therefore, it is possible to reduce the load on the fixing portion of the fixing surface fixed to one surface of the connecting portion, and to securely fix the connecting portion and the terminal piece. Therefore, connection failure between the connection portion and the terminal piece can be suppressed.

  According to the invention described in claim 5, since the connection member described in claim 1 to claim 4 is provided, when the load in the direction orthogonal to the connection portion is applied, the connection portion and By reducing the load on the location where the terminal piece is fixed, the connecting portion and the terminal piece can be reliably fixed. That is, the battery assembly and the measuring means are connected by the connection member that suppresses the connection failure between the connection portion and the terminal piece. And the power supply device provided with the connection member which connects both a battery assembly and a measurement means can measure the electrical potential difference of the positive electrode of each battery of a battery assembly, and a negative electrode reliably.

  A power supply apparatus according to an embodiment of the present invention will be described with reference to FIGS. 1 to 3. A power supply device 1 shown in FIG. 1 is mounted on a hybrid vehicle that can be driven by the driving force of both an internal combustion engine and an electric motor, or an electric vehicle that can be driven by the driving force of the electric motor.

  As shown in FIG. 1, the power supply device 1 of the present invention includes a battery assembly 2, a measurement unit (not shown) for measuring a potential difference between a positive electrode 6 and a negative electrode 7 of each battery 4 to be described later, And a connection member 9 connected to connect the battery assembly 2 and the measuring means. The battery assembly 2 includes a plurality of batteries 4. The battery 4 includes a rectangular battery body 5, a positive electrode (hereinafter referred to as a positive electrode) 6, and a negative electrode (hereinafter referred to as a negative electrode) 7.

  The positive electrode 6 is provided at one end of the battery body 5. The negative electrode 7 is provided at the other end of the battery body 5. The positive electrode 6 and the negative electrode 7 are formed in a prismatic shape, and project from one end face (hereinafter referred to as one end face, shown in FIG. 1 and the like) 8 of the battery body 5 in the same direction. The positive electrode 6 and the negative electrode 7 are arranged in parallel (parallel).

  The plurality of batteries 4 are arranged along one direction (arrow H in FIG. 1) in a state in which the positive electrode 6 and the negative electrode 7 are adjacent to each other and the end faces 8 are located on the same plane. In the batteries 4 adjacent to each other, the positive electrode 6 and the negative electrode 7 are adjacent to each other. That is, the plurality of batteries 4 are stacked such that the positive electrodes 6 and the negative electrodes 7 are alternately reversed.

  A measuring means (not shown) detects the voltage difference between the positive electrode 6 and the negative electrode 7 of each battery 4 connected to the battery assembly 2 by the connecting member 9 and arranged as described above, and measures the potential difference. Measure the potential difference. The connection member 9 includes a connection portion 10 connected to the positive electrode 6 and the negative electrode 7 of each battery 4 and a terminal piece 15 attached to the connection portion 10. The connection member 9 is disposed on one end face 8 provided with the positive electrode 6 and the negative electrode 7 of each battery 4 constituting the battery assembly 2 and attached to the battery assembly 2.

  As shown in FIGS. 1 and 2, the connecting portion 10 is made of a conductive metal, and extends in a direction orthogonal to the pair of parallel portions 12 and 13 parallel to each other and the pair of parallel portions 12 and 13. And a connecting portion 11 for connecting the pair of parallel portions 12 and 13 to each other, and the planar shape is formed in a substantially U-shape. The connecting part 10 has one parallel part 12 of the pair of parallel parts 12 and 13 connected to the positive electrode 6 of one battery 4 of the batteries 4 adjacent to each other, and the other parallel part 13 connected to the other battery. 4 is connected to the negative electrode 7. And the positive electrode 6 of one battery 4 and the negative electrode 7 of the other battery 4 are connected to the surface on the side where a pair of parallel parts 12 and 13 face each other.

  Further, the connecting portion 10 is a through-hole formed by cutting out the end portion of the connecting portion 11 on the side away from the one end face 8 of the battery assembly 2 and a terminal piece 15 (described later) from which the end portion is cut out. A portion 14 is provided. The through portion 14 passes the bent portion 17a of the connection surface 17 of the terminal piece 15 described later.

  The terminal piece 15 is a substantially L-shaped plate member made of a conductive metal, and has a fixing surface 16 and a connection surface 17 that bends and extends from the fixing surface 16. Yes. The fixing surface 16 is formed in a rectangular planar shape, and is overlapped with the electrode side surface of the connecting portion 11 of the connecting portion 10 and fixed by welding or the like. The connection surface 17 is bent and connected in a direction perpendicular to the fixing surface 16, and when the fixing surface 16 is fixed to the electrode side surface of the connection portion 11 of the connection portion 10, the connection portion 11 of the connection portion 10. It extends upright from the surface on the side away from the electrode. Further, the connecting surface 17 is provided with a bent portion 17a and a wide portion 17b.

  The bent portion 17a is formed in an L shape when viewed from the side, and has one end connected to the fixing surface 16 and the other end connected to the wide portion 17b. The bent portion 17 a is formed to be narrower than the width of the fixing surface 16, and a step is provided between both ends of the fixing surface 16. Further, the bent portion 17 a is formed to be narrower than the width of the through portion 14 provided in the connecting portion 11 of the connecting portion 10.

  The wide portion 17b is connected to the other end of the bent portion 17a and has a rectangular planar shape. The wide portion 17b is formed wider than the bent portion 17a. The wide portion 17b extends from both ends in the width direction of the bent portion 17a toward both sides, and a step is provided between both ends of the bent portion 17a. It has been. Further, the wide portion 17 b is formed wider than the width of the through portion 14 provided in the connecting portion 11 of the connection portion 10.

  The terminal piece 15 is fixed by welding or the like on the electrode side surface of the connecting portion 11 of the connecting portion 10, and the bent portion 17 a of the connecting surface 17 is connected to the connecting portion 11 of the connecting portion 10. The wide portion 17b of the connection surface 17 is erected from the surface on the side away from the electrode of the connection portion 11 of the connection portion 10 while passing through the provided through portion 14. At this time, the surface 17b1 near the bent portion 17a of the wide portion 17b of the step portion between the both ends of the bent portion 17a and the wide portion 17b is a surface on the side away from the electrode of the connecting portion 11 of the connecting portion 10. Abut. Thus, the terminal piece 15 is attached to the connecting portion 10 and is electrically connected. A surface 17b1 of the wide portion 17b near the bent portion 17a forms a catch portion described in the claims.

  As described above, the terminal piece 15 has the fixing surface 16 overlapped with the electrode-side surface of the connecting portion 11 of the connecting portion 10 and fixed by welding or the like, and the bent portion 17a of the connecting surface 17 is connected to the connecting portion 10. A surface 17b1 which is passed through the through portion 14 of the connecting portion 11 and which is close to the bent portion 17a of the wide portion 17b of the connecting surface 17 abuts on the surface of the connecting portion 10 on the side away from the electrode, so that the connecting surface 17 Is erected from the surface of the connecting portion 10 away from the electrode of the connecting portion 11. And the terminal piece 15 is attached to the connection part 10. FIG.

  In the connection part 10 to which the terminal piece 15 is attached, the pair of parallel parts 12 and 13 of the connection part 10 are connected to both the positive electrode 6 and the negative electrode 7 of each battery 4, and the connection part 10 is connected to the positive electrode 6. It is electrically connected to both the negative electrode 7. And it attaches on the end surface 8 of the battery assembly 2, and the connection part 11 of the connection part 10 is distribute | arranged in parallel with the one direction H in which each battery 4 is arranged. Then, the connection member 9 constituted by the terminal piece 15 and the connection portion 10 is attached to the battery assembly 2.

  Then, the positive electrode 6 of one battery 4 located on one end side in one direction H where the batteries 4 are arranged, and the negative electrode 7 of another battery 4 located on the other end side in the one direction H where the batteries 4 are arranged. The positive electrode 6 and the negative electrode 7 that are adjacent to each other are electrically connected by the connecting member 9. And the some battery 4 is mutually electrically connected in series. In this way, the battery assembly 2 and the measuring means are connected by the connecting member 9 to constitute the power supply device 1 described above.

  According to the present embodiment, the power supply device 1 is attached to the battery assembly 2 with one end of the connection portion 10 of the connection member 9 connected to the positive electrode 6 and the other end connected to the negative electrode 7. The terminal piece 15 attached to the is connected to a measuring means (not shown). And the potential difference of the positive electrode 6 and the negative electrode 7 of each battery 4 can be measured by connecting the connecting member 9 attached to the battery assembly 2 and a measuring means (not shown).

  In the connection member 9 described above, the width of the wide portion 17b provided on the connection surface 17 of the terminal piece 15 is formed wider than the width of the bent portion 17a, and between the wide portion 17b and both ends of the bent portion 17a. A step is provided, and the width of the through portion 14 of the connecting portion 11 of the connecting portion 10 is wider than the width of the bent portion 17a of the connecting surface 17 and narrower than the width of the wide portion 17b of the connecting surface 17. .

  For this reason, the fixing surface 16 of the terminal piece 15 is superimposed on the electrode side surface of the connecting portion 11 of the connecting portion 10 and fixed by welding or the like, and the bent portion 17a of the connecting surface 17 is passed through the connecting portion 11 of the connecting portion 10. When passing through the portion 14, the surface 17b1 near the bent portion 17a of the wide portion 17b of the step portion between the wide portion 17b and both ends of the bent portion 17a is separated from the electrode of the connecting portion 11 of the connecting portion 10. By abutting against the side surface, a load in a direction orthogonal to the connection portion 10 can be received by the surface 17b1 near the bent portion 17a of the wide portion 17b of the connection surface 17, and the fixing surface 16 fixed by welding or the like. It is possible to reduce the load on the fixing portion. Therefore, the connection part 10 and the terminal piece 15 can be fixed reliably, and a connection failure can be suppressed.

  Then, the measuring means is electrically connected to the positive electrode 6 and the negative electrode 7 of each battery 4 of the battery assembly 2 using the connection member 9 described above. Therefore, the connection member 9 can be reliably connected to both the positive electrode 6 and the negative electrode 7, whereby connection failure of the connection member 9 can be suppressed. For this reason, the measuring means can reliably measure the potential difference between the positive electrode 6 and the negative electrode 7 of each battery 4. Therefore, a power supply device capable of reliably measuring the potential difference between the positive electrode 6 and the negative electrode 7 of each battery 4 of the battery assembly 2 is obtained.

  In the embodiment described above, the width of the bent portion 17a of the connection surface 17 provided on the terminal piece 15 of the connection member 9 is formed to be narrower than the width of the through portion 14 of the connection portion 10 and the connection surface 17. The width of the wide portion 17b wider than the width of the bent portion 17a is formed wider than the width of the through portion 14 of the connecting portion 10, and the step between the wide portion 17b and both ends of the bent portion 17a. A surface 17b1 near the bent portion 17a of the wide portion 17b of the portion is in contact with the surface of the connection portion 10 on the side away from the electrode.

  However, in the present invention, as shown in FIGS. 5 to 7, the connecting surface 17 is provided with a bent portion 17 a ′ bent from the fixing surface 16, and a pair of contact pieces 17 c and 17 c are formed on the bent portion 17 a ′. In addition, the surface 17c1 near the fixing surface 16 of each of the pair of contact pieces 17c, 17c may be the terminal piece 15 that contacts the surface of the connection portion 10 away from the electrode. 5 to 7, the same parts as those of the above-described embodiment are denoted by the same reference numerals and description thereof is omitted.

  In the case shown in FIGS. 5 to 7, the terminal piece 15 includes a fixing surface 16 fixed to the electrode-side surface of the connecting portion 11 of the connecting portion 10, and a connecting portion of the connecting portion 10 bent from the fixing surface 16. 11 is provided with a connection surface 17 extending to the surface side away from the electrode, and is formed in a substantially L shape when viewed from the side. The fixing surface 16 is formed in a flat plate shape and is continuous with the connection surface 17.

  The connection surface 17 is provided with a bent portion 17a 'bent from the fixing surface 16, and a pair of contact pieces 17c and 17c provided on the bent portion 17a'. The connection surface 17 has a pair of abutting pieces 17c, 17c projecting from both end portions in the width direction of the bent portion 17a 'toward the battery assembly 2 so as to have a U-shaped cross section. The connection surface 17 is erected from the surface on the side away from the electrode of the connecting portion 11 of the connection portion 10.

  The terminal portion 15 is fixed by welding or the like, with the fixing surface 16 overlapped on the electrode side surface of the connection portion 10, and the connection surface 17 is erected from the surface of the connection portion 10 away from the electrode. In addition, the surface 17c1 near the fixing surface 16 of each of the pair of contact pieces 17c, 17c provided on the bent portion 17a ′ of the connection surface 17 contacts the surface of the connection portion 10 on the side away from the electrode. 10 and fixed. A surface 17c1 near the fixing surface 16 of each of the pair of contact pieces 17c, 17c forms a catch portion described in the claims.

  In the case shown in FIGS. 5 to 7, the surface 17 c 1 near the fixing surface 16 of each of the pair of contact pieces 17 c and 17 c provided on the bent portion 17 a ′ of the connection surface 17 of the terminal piece 15 is connected to the connection portion 10. By abutting the surface of the portion 11 away from the electrode, the load applied to the fixing portion of the fixing surface 16 fixed by welding or the like can be reduced with respect to the load applied in the direction orthogonal to the connecting portion 10. it can.

  In this embodiment, the terminal piece 15 is provided with a pair of contact pieces 17c, 17c at the bent portion 17a ′ of the connection surface 17, and a pair of contact pieces 17c on the surface of the connection portion 10 away from the electrode side. , 17c are attached to the connecting portion 10 with the surfaces 17c1 close to the fixing surface 16 in contact with each other. However, in the present invention, any number of contact pieces that contact the surface of the connection portion 10 away from the electrode side may be provided, and any shape may be used.

  In the above-described embodiment, the pair of contact pieces 17c and 17c are provided on the bent portion 17a ′ of the connection surface 17 of the terminal piece 15 of the connection member 9, and the pair of contact pieces 17c and 17c are close to the fixing surface 16 respectively. The surface 17c1 is in contact with the surface of the connection portion 10 on the side away from the electrode. However, in the present invention, as shown in FIGS. 8 to 10, the bent portion 17 a ′ bent from the fixing surface 16 to the connection surface 17 of the terminal piece 15, the second bent portion 17 d bent from the bent portion 17 a ′, and the As a terminal piece 15 provided with a third bent portion 17e bent from the second bent portion 17d, the surface 17d1 near the bent portion 17a of the second bent portion 17d abuts on the surface of the connecting portion 10 away from the electrode. Also good. In FIG. 8 to FIG. 10, the same parts as those of the above-described embodiment are designated by the same reference numerals and the description thereof is omitted.

  In the case shown in FIGS. 8 to 10, the terminal piece 15 is overlapped with the electrode side surface of the connecting portion 11 of the connecting portion 10 and fixed by welding or the like, and the terminal piece 15 is bent from the fixing surface 16. A connecting surface 17 extending to the surface of the connecting portion 10 away from the electrode of the connecting portion 11 is provided. The fixing surface 16 is formed in a flat plate shape and is continuous with the connection surface 17.

  The connecting surface 17 includes a bent portion 17a ′ bent from the fixing surface 16, a second bent portion 17d bent from the bent portion 17a toward the battery assembly 2, and a bent portion 17a bent from the second bent portion 17d. A third bent portion 17e extending in the direction of leaving is provided, and is formed in a staircase shape when viewed from the side. The bent portion 17a 'has one end connected to the fixing surface 16 and the other end connected to the second bent portion 17d. The second bent portion 17d has one end connected to the bent portion 17a and the other end connected to the third bent portion 17e. One end of the third bent portion 17e is connected to the second bent portion 17d and the other end is a free end.

  Then, the terminal portion 15 is fixed by welding or the like with the fixing surface 16 overlapped on the electrode-side surface of the connecting portion 10, and the connecting surface 17 is a bent portion 17 a ′ of the second bent portion 17 d of the connecting surface 17. The near surface 17d1 abuts on the surface of the connecting portion 10 away from the electrode, and the third bent portion 17e is erected in a direction away from the bent portion 17a ′, and is attached and fixed to the connecting portion 10. . A surface 17d1 near the bent portion 17a 'of the second bent portion 17d forms a catch portion described in the claims.

  In the case shown in FIGS. 8 to 10, the surface 17 d 1 near the bent portion 17 a ′ of the second bent portion 17 d provided on the connecting surface 17 of the terminal piece 15 is away from the electrode of the connecting portion 11 of the connecting portion 10. By abutting on this surface, it is possible to reduce the load applied to the fixing portion of the fixing surface 16 fixed by welding or the like with respect to the load applied in the direction orthogonal to the connecting portion 10.

  In addition, embodiment mentioned above only showed the typical form of this invention, and this invention is not limited to embodiment. Various modifications can be made without departing from the scope of the present invention.

It is a perspective view which shows the power supply device concerning one Embodiment of this invention. It is a disassembled perspective view which shows the connection member of the power supply device shown by FIG. It is a perspective view which shows the state which assembled | attached the connection member shown by FIG. It is sectional drawing along the IV-IV line of the connection member shown by FIG. FIG. 6 is an exploded perspective view showing a modification of the connection member shown in FIG. 2. It is a perspective view which shows the state which assembled | attached the connection member shown by FIG. It is sectional drawing along the VII-VII line of the connection member shown by FIG. It is a disassembled perspective view which shows another modification of the connection member shown by FIG. It is a perspective view which shows the state which assembled | attached the connection member shown by FIG. It is sectional drawing along the XX line of the connection member shown by FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Power supply device 2 Battery assembly 4 Battery 6 Positive electrode 7 Negative electrode 9 Connection member 10 Connection part 14 Passing part 15 Terminal piece 16 Adhering surface 17 Connection surface 17a, 17a 'Bending part 17b Wide part 17c Contacting piece 17d Second bending part 17e Third bent portion 17b1, 17c1, 17d1 surface (hook portion)

Claims (5)

A connection part that connects a positive electrode of one battery adjacent to each other of the battery assembly and a negative electrode of another battery, a terminal piece that is attached to the connection part and connected to a measuring means that detects a voltage; In a connecting member comprising:
The terminal piece has a substantially L-shape having a fixing surface fixed to one surface of the connection portion and a connection surface bent from the fixing surface and extending to the other surface side of the connection portion. A plate-like member,
A connecting member, wherein the connecting surface is provided with a hooking portion that comes into contact with the other surface of the connecting portion. The connecting surface has a bent portion bent from the fixing surface and a wide portion formed wider than the width of the bent portion; and
The connecting portion has a passage portion that is wider than the width of the bent portion and narrower than the width of the wide portion and passes through the bent portion at a location where the terminal piece of the connecting portion straddles. ,
The connecting member according to claim 1, wherein a surface of the wide portion near the bent portion is in contact with a side portion of the through portion to form the hook portion. The connection surface has a bent portion bent from the fixing surface and a contact piece protruding from the bent portion toward the battery assembly,
2. The connection member according to claim 1, wherein a surface of the contact piece near the fixing surface is in contact with the other surface of the connection portion to form the hook portion. The connection surface has a bent portion bent from the fixing surface, a second bent portion bent from the bent portion toward the battery assembly, and a third bent portion standing from the second bent portion,
2. The connection member according to claim 1, wherein a surface of the second bent portion closer to the bent portion is in contact with the other surface of the connection portion to form the hook portion. A battery assembly including a plurality of batteries each having a positive electrode at one end and a negative electrode at the other end, and a measurement for measuring a potential difference between the positive electrode and the negative electrode of each battery constituting the battery assembly In a power supply device comprising: a connecting member for connecting the battery assembly and the measuring means;
A power supply apparatus comprising the connection member according to any one of claims 1 to 4 as the connection member.

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