JP2008198525A - Power supply device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power supply device capable of improving connection reliability in a simple structure, restraining cost from rising, and miniaturizing. <P>SOLUTION: The power supply device 1 has a battery collected body 2, a plurality of constrained bands 20, bar buses 9 and 10, and a connection member 28. The battery collected body 2 has a plurality of batteries 4. The batteries 4 are lined up along one direction H on condition that a positive electrode 6 and negative electrode 7 are provided and the positive electrode 6 and negative electrode 7 are alternately lined up in an inverse state. A plurality of batteries 4 are connected in series by connecting the mutually adjacent positive electrode 6 and negative electrode 7 with the bar buses 9 and 10. The plurality of constrained bands 20 fix the plurality of batteries 4 lined up along one direction H by bundling the plurality of batteries 4. The connection member 28 connects the negative electrode 7 of one battery 4a with one constrained band 20a so that connecting a first firmly fixing section and the negative electrode 7 of one battery 4a located on an end of one direction H where the plurality of batteries 4 are lined up are connected with each other and a second firmly fixing section and one constrained band 20a are connected with each other. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to, for example, a power supply device obtained by connecting a plurality of batteries in series and mounted on a hybrid vehicle, an electric vehicle, or the like that can travel with the power of both an internal combustion engine and an electric motor.

  A hybrid vehicle that travels with the driving force of both the internal combustion engine and the electric motor, an electric vehicle that travels with the driving force of the electric motor, and the like are equipped with a power supply device, and accumulate and discharge electric energy. The power supply device includes a battery assembly including a plurality of batteries, and the batteries are connected in series to obtain a desired voltage. For each battery, a nickel metal hydride battery or the like is used.

  Conventionally, various power supply devices (see, for example, Patent Document 1) have been proposed as the power supply device described above. This type of power supply device includes a battery assembly composed of a plurality of batteries, a pair of end plates that sandwich the batteries between each other, and a plurality of restraining bands that bundle and fix the batteries. .

  Each battery constituting the battery assembly is arranged along one direction, and a positive electrode protrudes from one side surface in the longitudinal direction of the battery body and a negative electrode protrudes from the other side surface. ing. And the positive electrode and negative electrode of each battery which mutually adjoin each other are connected by a connection part etc., and connect each said battery in series. Each of the pair of end plates is formed in a rectangular shape, and is disposed at both ends in one direction in which the batteries are arranged, and sandwiches the batteries between each other. In addition, a plurality of restraining bands, which will be described later, are attached to the pair of end plates by bolts on both end faces in a direction orthogonal to one direction in which the batteries are arranged.

The restraint band is formed in a strip shape having a rectangular cross section, and the longitudinal direction is arranged along one direction in which the batteries are arranged, and a plurality of the restraint bands are provided at equal intervals. In addition, the restraining band is provided with an L-shaped attachment portion formed by bending the restraining band into an L shape at one end portion in the longitudinal direction, and an attachment plate portion formed at the other end portion. Each of the plurality of restraining bands is overlapped with both end faces in a direction orthogonal to one direction in which the batteries constituting the battery assembly are arranged, and the L-shaped attachment portion at one end is fixed to one end plate with a bolt. The mounting plate at the other end is fixed to the other end plate with bolts, and is attached to the upper and lower surfaces of the pair of end plates to bind and fix the batteries in one direction.
JP 2001-68081 A

  The power supply device having the above-described configuration includes a positive electrode of a battery positioned at one end of each battery in a battery assembly in which the batteries are connected in series and a negative electrode of another battery positioned at the other end of the one direction. Electric wires are connected to both the electrodes and voltage is output to the outside. A thick wire is used for this wire.

  For this reason, when the electric wire is bent, a load is applied to the connection portion between the electrode of the battery and the electric wire, and there is a concern that the connection position accuracy may be deteriorated such as breakage of the connection portion or displacement of the connection position. In addition, it is necessary to secure a space for wiring, and there is a problem that the power supply device is hindered from being reduced in size and weight and simplified.

  Accordingly, an object of the present invention is to provide a power supply device that can improve connection reliability with a simple structure, can suppress an increase in cost, and can be downsized.

  In order to solve the above-mentioned problems and achieve the object, the invention described in claim 1 is a battery assembly including a plurality of batteries each having a positive electrode at one end and a negative electrode at the other end; In a power supply device comprising a plurality of restraining bands made of a material having and binding and fixing each battery of the battery assembly, and a connecting portion for connecting the batteries in series, all the batteries are connected in series. And a connecting member for connecting at least one of the electrodes from which the voltage is extracted and one restraint band.

  According to a second aspect of the present invention, in the first aspect of the present invention, the second connecting member that connects an electrode for extracting a voltage when the plurality of batteries are connected in series to each other and another restraining band. It is characterized by having.

  The invention described in claim 3 is the invention described in claim 1 or 2, wherein the restraining band includes an output terminal for outputting the voltage to the outside at one end in the longitudinal direction. It is characterized by.

  According to the first aspect of the present invention, the battery assembly includes a connecting member that connects at least one of the electrodes for extracting a voltage when the batteries of the battery assembly are connected in series with one restraint band. Yes. For this reason, since the voltage of the battery assembly can be output through the restraint band, it is possible to reduce the load applied to the connection part with the electrode, and to improve the connection position system of the electrode part, An electric wire connected to the electrode for taking out the voltage of the battery assembly becomes unnecessary, and the number of parts can be reduced.

  According to the invention described in claim 2, the second connecting member for connecting the electrode for taking out the voltage when the plurality of batteries of the battery assembly are connected in series to each other and the other restraining band is provided. . For this reason, since the voltage of each battery of a battery assembly can be detected via a restraint band, the number of parts can be reduced.

  According to the invention described in claim 3, the restraint band includes the output terminal for outputting the voltage to the outside at one end portion in the longitudinal direction. For this reason, the electric wire connected to the electrode for taking out the voltage of a battery assembly becomes unnecessary, and can reduce a number of parts.

  As described above, according to the invention described in claim 1, since the voltage of the battery assembly can be output through the restraining band, the connection position system of the electrode portion can be improved, and the battery An electric wire for taking out the voltage of the assembly becomes unnecessary, and the number of parts can be reduced. Therefore, it is possible to improve connection reliability, suppress an increase in cost, and reduce the size.

  According to the invention described in claim 2, since the voltage of each battery of the battery assembly can be detected via the restraining band, the number of parts can be reduced. Therefore, the cost increase can be suppressed and the size can be reduced.

  According to the invention described in claim 3, an electric wire for taking out the voltage of the battery assembly becomes unnecessary, and the number of parts can be reduced. Therefore, the cost increase can be suppressed and the size can be reduced.

  Hereinafter, a power supply device according to an embodiment of the present invention will be described with reference to FIGS. 1 to 3. A power supply device 1 according to an embodiment of the present invention 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, bus bars 9 and 10 as connecting portions for connecting batteries 4 to be described later in series, and the bus bars 9 and 10 to the battery assembly 2. As a measuring means for measuring a potential difference between a bus bar module 16 to be attached to a battery and a positive electrode 6 (hereinafter referred to as a positive electrode) and a negative electrode 7 (hereinafter referred to as a negative electrode) of each battery 4 to be described later. A measurement unit (not shown), a junction box 40 connected to both the battery assembly 2 and the measurement unit to monitor the voltage of each battery 4 of the battery assembly 2 and output the voltage to the outside, and a pair of End plates 15a and 15b, a restraining band 20 for bundling and fixing each battery 4 to be described later, a total + terminal 26, a connection member 28, and a pair of second connection members 29 and 32 are provided.

  As shown in FIG. 1, the battery assembly 2 includes a plurality of batteries 4. The battery 4 includes a rectangular battery body 5, a positive electrode 6, and 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, are provided so as to protrude in the same direction from one end surface 8 (hereinafter referred to as one end surface) of the battery body 5 and are arranged in parallel (parallel) to each other. ing.

  As shown in FIG. 1, the plurality of batteries 4 are arranged in one direction so that the positive electrodes 6 and the negative electrodes 7 of the adjacent batteries 4 are adjacent to each other with one end face 8 positioned on the same plane. They are arranged along (arrow H in FIG. 1). Furthermore, the plurality of batteries 4 are arranged in two rows so that the one direction H that is opposite to each other in the direction intersecting the one direction H and that is adjacent to each other is parallel. 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. In the battery assembly 2, a restraining band 20, which will be described later, is disposed on an upper surface 3 a composed of one end face 8 of the plurality of batteries 4 and a bottom surface 3 b opposite to the upper surface 3 a.

  The bus bars 9 and 10 are each formed of a plurality of conductive metals. As shown in FIG. 1 or FIG. 2, the bus bar 9 is formed in a strip shape, and is in the direction parallel to the direction intersecting the one direction H in which the plurality of batteries 4 are arranged. The positive electrode 6 and the negative electrode 7 are connected to one surface intersecting the one direction H, and the adjacent positive electrodes 6 and the negative electrodes 7 of the adjacent batteries 4 are connected to each other. The bus bar 9 is provided with connection terminals 14 so as to protrude outward from the other surface intersecting the one direction H. The connection terminal 14 is formed in a plate shape and is connected to a connector of a measurement unit (not shown) described later.

  The bus bar 10 has a U-shaped planar shape, and connects the positive electrode connection wall 11 connected to the positive electrode 6, the negative electrode connection wall 12 connected to the negative electrode 7, and the positive electrode connection wall 11 and the negative electrode connection wall 12. And a connecting wall 13. The positive electrode connection wall 11 and the negative electrode connection wall 12 are each formed in a substantially rectangular shape, are opposed to each other and are parallel to each other.

  The connection wall 13 is formed in a substantially rectangular shape, and includes a connection terminal 14 that is connected to a connector (not shown) of a measurement unit (not shown) to be described later. As shown in FIG. 1, the connection terminal 14 is formed in a plate shape, and is provided so as to protrude outward from the connection wall 13.

  The bus bar 10 is arranged on the upper surface 3a of the battery assembly 2 so that the connecting wall 13 of the bus bar 10 is parallel to the direction intersecting the one direction H in which the plurality of batteries 4 are arranged, and the positive electrode connection wall. The positive electrode 6 and the negative electrode 7 are connected to the surfaces on the opposite sides of the negative electrode connection wall 12 and the negative electrode connection wall 12, respectively, so that the adjacent positive electrodes 6 and negative electrodes 7 of the adjacent batteries 4 are connected.

  The bus bar module 16 is made of an insulating material, and is formed in a case shape having a bottom wall 16a having a substantially rectangular plate shape and a peripheral wall 16b erected from the outer edge of the bottom wall 16a. Yes. Further, the bus bar module 16 has a plurality of through holes 17 through which the positive electrode 6 and the negative electrode 7 of each battery 4 of the battery assembly 2 described above are inserted into the bottom wall 16a, and a pair of positionings described later of one end plate 15b. A pair of holes (not shown) through which the protrusions 18 are inserted are provided. In addition, a plurality of bus bars 9 and 10 are attached to the bus bar module 16 at positions where the positive electrodes 6 and the negative electrodes 7 of the respective batteries 4 can be connected to the surface of the bottom wall 16a.

  In the bus bar module 16, the bottom wall 16 a is overlapped with the upper surface 3 a of the battery assembly 2, and the positive electrode 6 and the negative electrode 7 of each battery 4 are respectively inserted into the plurality of through holes 17. At this time, the positive electrode 6 and the negative electrode 7 of each adjacent battery 4 inserted through the plurality of through holes 17 are connected by a plurality of bus bars 9 and 10 attached to the surface of the bottom wall 16a. Thus, the bus bar module 16 collectively connects the plurality of bus bars 9 and 10 to the positive electrode 6 and the negative electrode 7 of each battery 4 adjacent to each other in the battery assembly 2.

  The measurement unit is connected to the connection terminals 14 of the bus bars 9 and 10. The measurement unit 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 bus bars 9 and 10 and arranged as described above, and measures the potential difference. Measure the potential difference.

  The junction box 40 is formed in a block shape with an insulating material. The junction box 40 includes an electronic component such as a printed circuit board inside, and includes a service plug portion 43 on one end side in a direction intersecting the one direction H described above. In addition, the junction box 40 is provided with mounting portions 41 and 42 on the upper surface on the same plane as the upper surface 3 a of the battery assembly 2, in which a later-described total terminal 24 and intermediate terminal 25 of the restraining band 20 are disposed. .

  The junction box 40 is connected to the battery assembly 2 by the restraint band 20 and is connected to a measurement unit (not shown) via an electric wire or the like, and outputs the voltage of each battery 4 of the battery assembly 2 to the outside and measures the voltage. The state of each battery 4 is monitored based on the voltage of each battery 4 detected by the unit.

  The service plug unit 43 is connected to the junction box 40 by an electric wire or the like. The service plug unit 43 is connected to the batteries 4c and 4d located in the middle of the one direction H in which the plurality of batteries 4 are arranged via the junction box 40, so that the batteries 4c and 4d located in the middle of the one direction H are connected. The series connection and disconnection are performed, and the batteries 4 of the battery assembly 2 are connected in series and disconnected.

  Each of the pair of end plates 15a and 15b is made of an insulating material and formed in a rectangular shape. The pair of end plates 15a and 15b are arranged opposite to each other with a space therebetween and in parallel. As shown in FIG. 1 or 2, the pair of end plates 15 a and 15 b sandwich the plurality of batteries 4 described above and are arranged in parallel with the longitudinal direction of the battery body 5 of the plurality of batteries 4. Yes. The pair of end plates 15 a and 15 b are each attached with a restraining band 20, which will be described later, by a bolt 19.

  A plurality of the restraining bands 20 are made of a conductive material and formed in a strip shape. The plurality of restraining bands 20 are respectively disposed on the upper surface 3a of the battery assembly 2 and the bottom surface 3b opposite to the upper surface 3a. The plurality of restraining bands 20 are arranged in parallel to one direction H in which the batteries 4 are arranged, and are spaced from each other. Each of the plurality of restraining bands 20 is provided with a fixing portion 21 at one end portion in the longitudinal direction and a fixing portion 22 at the other end portion.

  When the restraint band 20 is attached to the battery assembly 2, the fixing portions 21 and 22 are formed by bending the restraint band 20 so as to be parallel to the end plates 15a and 15b. Each of the fixing portions 21 and 22 is provided with a through hole (not shown), and a bolt 19 is passed through and fixed to the end plates 15a and 15b described above.

  In addition, a total terminal 24 is provided on one restraint band 20a so as to protrude outwardly from the fixed portion 21. The total terminal 24 is provided with a through hole 24a. The total terminal 24 is connected to an electric wire or the like by a bolt or the like in the through hole 24a and outputs the voltage of the battery assembly 2 to the outside. The total terminal 24 is an output terminal described in the claims. And this one restraint band 20a is connected by the connection member 28 mentioned later for the negative electrode 7 for taking out the voltage of the battery assembly 2 to which all the batteries 4 were connected in series.

  Furthermore, intermediate terminals 25 are provided on the other restraining bands 20b and 20c so as to protrude outwardly from the fixing portion 21, respectively. The intermediate terminal 25 is provided with a through hole 25a and is attached to the attachment portion 41 of the junction box 40 with a bolt or the like. The intermediate terminal 25 is connected to the junction box 40, and the batteries 4 c and 4 d are connected in series and disconnected by the service plug unit 43 of the junction box 40. The intermediate terminal 25 forms an output terminal described in the claims. These other restraining bands 20b and 20c are connected to the positive electrode 6 and the negative electrode 7 for extracting the voltages of the batteries 4c and 4d connected in series by second connecting members 29 and 32, respectively, which will be described later. The

  As shown in FIG. 1, the total + terminal 26 is formed in the shape of a strip made of a conductive metal, and one end in the longitudinal direction is bent to the surface side of the total + terminal 26 and is fixed. And a fixing portion 26b having a through hole 26c formed at the other end. The total + terminal 26 is formed in an L shape when viewed from the side. In addition, the total + terminal 26 is connected to a through hole 26c with a wire or the like by a bolt or the like, and outputs the voltage of the battery assembly 2 to the outside.

  Each of the connecting member 28 and the pair of second connecting members 29 and 32 is a plate-like member formed in a flat plate shape made of a conductive metal, as shown in FIG. 1 or FIG. ing. The connection member 28 and the second connection member 29 are formed in the same shape as each other, and the first fixing portion 30 and the first fixing portion 30 that are formed in a rectangular shape when viewed from the side, respectively. And a second fixing part 31 formed wider than the first fixing part 30 when viewed from the side.

  The second connection member 32 is formed in substantially the same shape as the connection member 28 and the second connection member 29, and has a first fixing portion 33 and a first fixing portion formed in a rectangular shape when viewed from the side. 33 and a second fixing portion 34 formed wider than the first fixing portion 33 when viewed from the side. The second connecting member 32 is formed such that the longitudinal length of the first fixing portion 33 is longer than the longitudinal length of the first fixing portion 30 of the connecting member 28 and the second connecting member 29.

  When assembling the power supply device 1 having the above-described configuration, first, as shown in FIG. 1, each battery 4 arranged in two rows along one direction H of the battery assembly 2 is paired with a pair of end plates 15a and 15b. A plurality of restraining bands 20 are arranged on both the upper surface 3a and the bottom surface 3b of the battery assembly 2 so as to be spaced from each other, and the side of the pair of end plates 15a, 15b away from each battery 4 The plurality of restraining bands 20 are attached to the battery assembly 2 by superimposing the fixing portions 21 and 22 on the outer surface, that is, on the outer surface, and fixing with the bolts 19.

  Next, as shown in FIG. 1, in order to take out the voltage of all the batteries 4 when all the batteries 4 of the battery assembly 2 are connected in series, the battery 4 is positioned at one end in one direction H. The connecting member 28 connects the negative electrode 7 of one battery 4a and one restraint band 20a attached to the upper surface 3a of the battery assembly 2 to each other. One side surface of the first fixing portion 30 of the connection member 28 is in contact with the negative electrode 7 of one battery 4a, and the bottom surface of the second fixing portion 31 of the connection member 28 is in contact with one restraining band 20a. The first fixing part 30, the negative electrode 7 of one battery 4a, the second fixing part 31 and the one restraining band 20a are fixedly connected by welding or the like.

  Furthermore, in order to take out the voltage of each battery 4 when the plurality of batteries 4 of the battery assembly 2 are connected in series, the positive electrode 6 of one battery 4c located in the middle of the one direction H of the plurality of batteries 4. And the other restraining band 20 b attached to the upper surface 3 a of the battery assembly 2 are connected by one second connection member 29. One side surface of the first fixing portion 30 of one second connection member 29 is in contact with the positive electrode 6 of one battery 4c located in the middle of the one direction H, and the second of the second connection member 29 is second. The bottom surface of the fixing portion 31 and the other binding band 20b come into contact with each other, and the first fixing portion 30, the positive electrode 6 of the one battery 4c, the second fixing portion 31 and the other binding band 20b are respectively Fixed and connected by welding or the like.

  In addition, the negative electrode 7 of the other battery 4d located in the middle of the one direction H connected by the positive electrode 6 of the one battery 4c and the bus bar 9 described above, and still another constraint attached to the upper surface 3a of the battery assembly 2 The band 20 c is connected by the other second connection member 32. One side surface of the first fixing portion 33 of the other second connection member 32 is in contact with the negative electrode 7 of the other battery 4d located in the middle of the one direction H, and the second side of the other second connection member 32 is second. The bottom surface of the fixing portion 34 and the other restraining band 20c come into contact with each other, and the first fixing portion 33, the negative electrode 7 of the other battery 4d, the second fixing portion 34, and yet another restraining band 20c. Are fixed and connected by welding or the like.

  Then, as shown in FIG. 1 or FIG. 2, the total + terminal 26 is connected to the positive electrode 6 of one battery 4 b located at the other end in one direction H of the plurality of batteries 4. The total + terminal 26 is connected to the positive electrode 6 of the one battery 4b by the positive electrode 6 of the one battery 4b coming into contact with the surface of the fixed part 26a away from the fixing part 26b and fixed by welding or the like. To do. In this way, the total + terminal 26 is attached to the battery assembly 2.

  Subsequently, the positive electrode 6 and the negative electrode 7 of each battery 4 constituting the battery assembly 2 are inserted into the plurality of through holes 17 of the bus bar module 16, and the bus bars 9 and 10 are connected to the positive electrodes 6 of the respective batteries 4 adjacent to each other. And attached to the negative electrode 7. As shown in FIG. 2, the bus bars 9 and 10 exclude the negative electrode 7 of one battery 4a located at one end and the positive electrode 6 of another battery 4b located at the other end among the plurality of batteries 4 arranged. In addition, the battery 4 is attached so as to connect the adjacent positive electrode 6 and negative electrode 7, and the batteries 4 constituting the battery assembly 2 are connected in series.

  The flat bus bar 9 is installed so as to be parallel to the adjacent positive electrode 6 and negative electrode 7 to be connected, and both the positive electrode 6 and the negative electrode 7 are welded to one surface parallel to one direction H of the bus bar 9. Fixed by the connection. Further, the U-shaped bus bar 10 is installed so as to sandwich the adjacent positive electrode 6 and negative electrode 7 to be connected, and the positive electrode connection wall 11 of the bus bar 10 is disposed on the surface facing the negative electrode connection wall 12. The negative electrode 7 is in contact with the surface of the negative electrode connection wall 12 facing the positive electrode connection wall 11, and the positive electrode connection wall 11, the positive electrode 6, the negative electrode connection wall 12, and the negative electrode 7 are in contact with each other. These are fixed and connected by welding or the like.

  The positive electrode 6 of one battery 4 and the negative electrode 7 of the other battery 4 that are adjacent to each other are connected to the surfaces of the positive electrode connection wall 11 and the negative electrode connection wall 12 that face each other. The distance between the surfaces of the bus bar 10 where the positive electrode connection wall 11 and the negative electrode connection wall 12 face each other is substantially equal to the distance between the surface of the positive electrode 6 on the positive electrode connection portion side and the surface of the negative electrode 7 on the negative electrode connection side. Thus, the plurality of batteries 4 constituting the battery assembly 2 are connected in series by the bus bars 9 and 10.

  Finally, the total terminal 24 and the intermediate terminal 25 of the plurality of restraining bands 20 are fixedly connected to the attachment portions 41 and 42 of the junction box 40 with bolts or the like, respectively, so that the total of one restraining band 20a is The terminal 24 is connected to the outside through the junction block 40, and the total + terminal 26 is connected to the outside by an electric wire or the like. Then, the intermediate terminals 25 of both of the other restraining bands 20 b and 20 c are connected to the measurement unit via the service plug unit 43 of the junction box 40. Further, the connection terminals 14 of the bus bars 9 and 10 are inserted into the connectors of the measurement unit and connected to the terminals of the connector, and all the connection terminals 14 and the terminals of the connector are connected, so that the battery assembly 2 and the measurement unit are connected. And are connected. Thus, the assembly of the power supply device 1 is completed.

  According to the present embodiment, the power supply device 1 includes the connection member 28 that connects the negative electrode 7 of one battery 4a located at one end in one direction H of the battery assembly 2 and one restraint band 20a. For this reason, the voltage of the battery assembly 2 can be output to the outside through one restraint band 20a by connecting the negative electrode 7 of one battery 4a and one restraint band 20a by the connecting member 28.

  Therefore, it is possible to improve the connection position system of the electrode part, and an electric wire for taking out the voltage of the battery assembly becomes unnecessary, and the number of parts can be reduced. Therefore, it is possible to improve connection reliability, suppress an increase in cost, and reduce the size.

  Further, the power supply device 1 of the present embodiment is connected in series with the negative electrode 7 and the other restraining band 20b of one battery 4c located in the middle of the one direction H of the battery assembly 2 and the one battery 4c. Second connection members 29 and 32 for connecting the positive electrode 6 of the other battery 4d located in the middle of the one direction H and the other restraining band 20c to each other are provided.

  For this reason, since the voltage of each battery 4c, 4d connected in series of the battery assembly 2 can be detected through the binding band, the number of parts can be reduced. Therefore, the cost increase can be suppressed and the size can be reduced.

  Furthermore, since the restraint band 20 includes the total terminal 24 and the intermediate terminal 25 as output terminals for outputting the above-described voltage to the outside, the voltage of the battery assembly 2 and each battery 4c connected in series are provided. , 4d voltage is not required, and the number of parts can be reduced. Therefore, the cost increase can be suppressed and the size can be reduced.

  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 disassembled perspective view which shows the power supply device concerning one Embodiment of this invention. It is a top view of the battery assembly of the power supply device shown in FIG. It is a side view of the battery assembly of the power supply device shown in FIG. It is a perspective view which shows the connection member and 2nd connection member which were provided in the power supply device shown by FIG. It is a perspective view which shows the state in which the power supply device of FIG. 1 was assembled | attached.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Power supply device 2 Battery assembly 4 Battery 6 Positive electrode (positive electrode)
7 Negative electrode (negative electrode)
9,10 Bus bar (connection part)
20 Restraint Band 24 Total-Terminal (Output Terminal)
25 Intermediate terminal (output terminal)
28 connecting members 29, 32 second connecting member

Claims (3)

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 plurality of restraining bands made of a conductive material and binding and fixing the batteries of the battery assembly. In the power supply device comprising a connecting portion for connecting the batteries in series,
A power supply apparatus comprising: a connecting member that connects at least one of electrodes for extracting a voltage when all the batteries are connected in series and one restraint band.   2. The power supply device according to claim 1, further comprising a second connection member that connects an electrode for extracting a voltage when the plurality of batteries are connected in series to each other and another restraining band.   The power supply device according to claim 1, wherein the restraint band includes an output terminal for outputting the voltage to the outside at one end in a longitudinal direction.

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