JP2011165628A - Secondary battery device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a secondary battery device reducing manufacturing cost, and design and shipment periods. <P>SOLUTION: The secondary battery device includes: a housing 10; a plurality of unit cells housed side by side in the housing; connection terminals 76b, 77b of a positive electrode and a negative electrode respectively connected to the unit cells and arranged in the housing; and an interface unit 21 including a base 22 attached to the housing, and output terminals 24, 26 of the positive electrode and the negative electrode arranged on the base, electrically connected to the connection terminals and connectable to an external apparatus. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a secondary battery device that includes a plurality of secondary batteries and a housing that houses these secondary batteries.

  In recent years, secondary batteries have been widely used as power sources for electric vehicles, hybrid electric vehicles, electric bicycles, or electric devices. For example, a lithium ion secondary battery, which is a non-aqueous secondary battery, has attracted attention as a power source for electric vehicles and the like because of its high output and high energy density.

  In general, the secondary battery is an outer container formed in a flat rectangular box shape with aluminum or the like, an electrode group housed in the outer container together with the electrolyte, and provided in the outer container and connected to the electrode group The electrode terminal is configured as a single cell.

  In order to achieve high capacity and high output, a secondary battery device is used in which a plurality of single cells are arranged in a casing and these single cells are connected in parallel or in series (for example, Patent Document 1). . The casing is provided with positive and negative output terminals, and the secondary battery device outputs power to the device to which it is applied via these output terminals.

JP-A-7-237457

  When a secondary battery device is mounted on a device, its arrangement and connection position are often different for each device to be applied, and the position of the output terminal of the secondary battery device is the arrangement position and connection of the secondary battery device. There is an optimum position depending on the equipment to be used. Therefore, the position of the output terminal of the secondary battery device is exclusively designed according to the installed equipment so as to be the optimum position for the applied equipment. However, with such a configuration, it is necessary to change the design of the housing according to the device to be applied, which increases the manufacturing cost of the secondary battery device and hinders the shortening of the design and shipping period. .

  The present invention has been made in view of the above points, and an object of the present invention is to provide a secondary battery device capable of reducing the manufacturing cost and the design and shipping period.

  A secondary battery device according to an aspect of the present invention is connected to a casing, a plurality of single cells housed side by side in the casing, a bus bar that electrically connects the plurality of single cells, and the single cell. Positive and negative connection terminals provided on the housing, a base attached to the housing, and a positive electrode provided on the base and electrically connected to the connection terminal and capable of connecting an external device; And an interface unit having a negative output terminal.

  According to the aspect of the present invention, the design of the housing body is changed if one kind of standard housing is prepared by setting an appropriate output terminal position for each device on which the secondary battery device is mounted. It becomes possible to cope without it. As a result, when a standard secondary battery device is mass-produced, it is not necessary to change the body part if the interface unit corresponding to the device is designed to be compatible, and the manufacturing cost of the secondary battery device is reduced and designed.・ The shipping period can be shortened.

FIG. 1 is a perspective view showing a secondary battery device according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of the secondary battery device showing a case and a single cell in an exploded manner. FIG. 3 is a perspective view showing a single cell. FIG. 4 is a longitudinal sectional view of the secondary battery device. FIG. 5 is a plan view schematically showing the arrangement and connection state of single cells and bus bars in the secondary battery device. FIG. 6 is an exploded perspective view showing the front end portion of the case and the interface unit. FIG. 7 is an exploded perspective view showing a base terminal and an output terminal of the interface unit. FIG. 8 is a perspective view showing a secondary battery device including an interface unit suitable for other devices. FIG. 9 is an exploded perspective view showing a secondary battery device including an interface unit suitable for the other device. FIG. 10 is a perspective view showing a secondary battery device including an interface unit suitable for another device. FIG. 11 is an exploded perspective view showing a secondary battery device including an interface unit suitable for the above-described other device. FIG. 12 is a perspective view showing a secondary battery device according to another embodiment. FIG. 13 is an enlarged perspective view illustrating a part of an interface unit of a secondary battery device according to another embodiment.

Hereinafter, a secondary battery device according to an embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a perspective view showing an appearance of a secondary battery device according to the embodiment, and FIG. 2 is an exploded perspective view of the secondary battery device showing a case and a single cell in an exploded manner.
As shown in FIGS. 1 and 2, the secondary battery device includes a substantially rectangular box-shaped case 10 and a plurality of, for example, 30 single cells (secondary batteries) 12 housed in the case. It is configured as an assembled battery. A case 10 that functions as a casing of a secondary battery device includes a rectangular frame-shaped center case 14 that is open at the top and bottom, a lower case 16 that is formed in a rectangular plate shape and forms a bottom wall, and a ceiling that is formed in a rectangular plate shape. It has three division members of the upper case 18 constituting the wall. The lower case 16, the center case 14, and the upper case 18 are joined together in this order to form a rectangular box-like case 10. The upper surface side of the upper case 18 is covered with a rectangular plate-like top cover 20. Each component of the case 10 and the top cover 20 are each formed of an insulating synthetic resin, for example, PPE.

  An interface unit 21 for electrically connecting the secondary battery device to an applied device (application) is attached to a side wall located on one end side in the longitudinal direction of the case 10, for example, the front end wall 10a. The interface unit 21 has a rectangular plate-like terminal base 22 formed of an insulating material, for example, a synthetic resin. The terminal base 22 is screwed and fixed to the front end wall 10a and is in close contact with the front end wall. . A battery monitoring board 28 for monitoring the voltage, temperature, etc. of the single cell 12 is attached to the terminal base 22. The interface unit 21 will be described in detail later.

  As shown in FIGS. 2 and 3, each single cell 12 is a nonaqueous electrolyte secondary battery such as a lithium ion battery, for example, a flat and substantially rectangular parallelepiped outer container 30 formed of aluminum or an aluminum alloy. And an electrode body 31 housed in the outer container 30 together with the non-aqueous electrolyte. The outer container 30 includes a container body 30a having an open upper end and a rectangular plate-like lid body 30b welded to the container body and closing the opening of the container body, and is formed in a liquid-tight manner. The electrode body 31 is formed in a flat rectangular shape by, for example, winding a positive electrode plate and a negative electrode plate in a spiral shape with a separator interposed therebetween, and further compressing in a radial direction. A positive electrode terminal 32a and a negative electrode terminal 32b are provided at both ends in the longitudinal direction of the lid body 30b and project from the lid body 30b. Between the negative electrode terminal 32b and the lid 30b, a sealing material made of an insulating material such as synthetic resin or glass, for example, a gasket 34 is provided. For example, a rectangular safety valve 36 is formed at the center of the lid 30b. An insulating film 37 is wound around the container body 30a except for the upper end and the lower end of the container.

  As shown in FIG. 2 and FIG. 4, the single cell 12 includes a plurality of single cells, for example, three single cells 12 connected in parallel to form one cell unit C, and this cell unit C is connected in series by 10 units. Is provided. The arrangement of the single cells 12 and the electrical connection structure will be described in detail later.

  On the inner surface of the lower case 16, a number corresponding to the number of the single cells 12, here, thirty engagement grooves 38 are formed. The plurality of engaging grooves 38 are provided in two rows at a predetermined interval in the longitudinal direction of the lower case 16. Center ribs 39 are formed between the two rows and extend over the entire length of the lower case 16 in the longitudinal direction.

  Four partition walls 50 are integrally formed in the center case 14, and the center case 14 is partitioned into five spaces by these partition walls 50. Further, support posts 52 extending in the height direction of the center case 14 are formed at the center of each partition wall 50 and the center of both longitudinal end walls of the center case 14. Each space in the center case 14 is divided into two left and right accommodation chambers 53 by support posts 52. Thereby, in the center case 14, the ten storage chambers 53 which can each accommodate 1 cell unit C are formed in 2 rows. A plurality of vent holes 51 are formed in each of the two side walls 14 a and 14 b extending in the longitudinal direction of the center case 14.

  As shown in FIG. 4, on the inner surface side of the upper case 18, a number corresponding to the number of unit cells 12, here, thirty engagement grooves 54 are formed. The plurality of engaging grooves 54 are provided in two rows at a predetermined interval in the longitudinal direction of the upper case 18. In the upper case 18, rectangular through holes corresponding to the positive terminal 32 a and the negative terminal 32 b of the single cell 12 are formed at the bottom of each engagement groove 54, and further, the exhaust facing the safety valve 36 of the single cell 12. A hole is formed.

  The lower case 16 configured as described above is screwed to the lower surface side of the center case 14 and fixed to the center case, and constitutes the bottom wall of the case 10. The upper case 18 is screwed to the upper surface side of the center case 14 and fixed to the center case, and constitutes the ceiling wall of the case 10. The center case 14 is joined between the lower case 16 and the upper case 18 facing each other with a gap.

  As shown in FIGS. 2 and 4, the single cell 12 is housed in the housing chamber 53 of the case 10 for each cell unit C. The lower end portion of each single cell 12 is fitted in the engaging groove 38 of the lower case 16 and is fixed to the lower case 16 with an adhesive or the like. The upper end portion of each single cell 12, that is, the end portion on which the electrode terminal is provided is fitted into the engagement groove 54 of the upper case 18 and is fixed to the upper case 18 with an adhesive or the like. A partition wall 50 of the center case 14 is sandwiched between two cell units C adjacent in the column direction to prevent a short circuit between the cell units. In addition, the center rib 39 of the lower case 16, the center rib of the upper case 18, and the support post 52 of the center case 14 are sandwiched between the cell units C in one row and the cell units C in the other row. Short circuit between C is prevented. The positive electrode terminal 32 a and the negative electrode terminal 32 b of the single cell 12 are respectively inserted into through holes formed in the upper case 18 and project to the upper surface side of the upper case 18.

  As shown in FIGS. 2, 4, and 5, in one cell unit C, the three unit cells 12 face each other with a predetermined gap between the main surfaces, and the electrode terminals face the same direction. Lined up in state. In one cell unit C, the three single cells 12 are arranged such that the positive terminals 32a are arranged in a line and the negative terminals 32b are arranged in a line. Ten cell units C are arranged in two rows of five cell units, and in each row, the positive electrode terminals 32a and the negative electrode terminals 32b of adjacent cell units are arranged alternately. And the cell unit C of each row | line | column is connected by the bus bar mentioned later, and comprises the assembled battery.

  A plurality of bus bars are provided on the upper surface side of the upper case 18, and the plurality of single cells 12 in each cell unit C are connected in parallel by these bus bars, and the plurality of cell units C are connected in series. Yes. In the present embodiment, four types of bus bars as connection fittings are used. That is, the positive electrode bus bar 76 that connects the positive terminals 32a of the three single cells 12 and has a positive output end at one end, and connects the negative terminals 32b of the three single cells 12 and has a negative output end at one end. A negative electrode bus bar 77, eight common bus bars 78 for connecting the electrode terminals of six unit cells 12 to each other, and a bus bar unit 80 in which three bus bars are connected are provided. The bus bars 76, 77, 78 and the bus bar unit 80 are formed by bending a metal plate made of a conductive material such as aluminum.

  As schematically shown in FIG. 5, the plurality of bus bars 76, 77, 78 and the bus bar unit 80 described above connect the three single cells 12 of each cell unit C in parallel, and 10 cell units C. Are connected to each other in series. Further, the positive electrode side output end portion 76b and the negative electrode side output end portion 77b are provided on the same wall surface of the case 10, that is, the front end wall 10a side, and the ten cell units C are connected to the negative electrode side from the positive electrode side output end portion 76b. The output end 77b is connected in a U-shape.

  As shown in FIGS. 2 and 6, two wiring boards 98 are pasted on the upper case 18. The wiring board 98 has a plurality of wirings extending in the longitudinal direction, and these wirings are electrically and mechanically connected to one corresponding bus bar. One end 98a of each wiring board 98 is connected to a battery monitoring board 28 described later.

  As shown in FIG. 1, the top cover 20 is formed in a rectangular plate shape having a size substantially equal to the planar shape of the case 10, and is provided to cover the plurality of bus bar mounting chambers of the upper case 18. The top cover 20 has a peripheral edge portion and a central portion screwed to a peripheral wall and a center rib of the upper case 18 and joined to the upper case 18.

  As shown in FIGS. 1, 6, and 7, the terminal base 22 of the interface unit 21 is detachably attached to the outer surface side of the front end wall 10a of the case 10. On the outer surface of the terminal base 22, the battery monitoring board 28 is fixed by screwing. One end 98a of each wiring board 98 described above is electrically connected to the battery monitoring board 28 via a connector or the like (not shown). The battery monitoring board 28 detects and monitors the voltage of the cell unit C. Moreover, the battery monitoring board 28 has a balance adjustment circuit, and adjusts the voltage balance between the single cells.

  A positive output terminal 24 and a negative output terminal 26 are attached to the terminal base 22. The negative output terminal 26 includes a terminal base 26a formed in a plate shape from stainless steel or the like, a plate-shaped conductive terminal 26b formed from a metal having high conductivity such as copper, and disposed on the terminal base 26a. have.

  A stud bolt 26c that functions as a connecting portion to which an external device can be connected is provided upright at the center lower portion of the terminal base 26a. For example, three screw holes are formed in the peripheral portion of the terminal base 26a, and two screw holes 107 are formed side by side at the upper end portion of the terminal base 26a. The conductive terminal 26b has a through hole 108 through which the stud bolt 26c is inserted, a through hole 109 formed at the lower end, and two through holes 110 formed at the upper end.

  The conductive terminal 26 b is disposed so as to overlap the terminal base 26 a with the stud bolt 26 c inserted into the through hole 108, and is screwed and fixed to the terminal base 26 a with a screw inserted through the through hole 109. The through holes 110 of the conductive terminal 26b are aligned with the screw holes 107 of the terminal base 26a, respectively.

  The terminal base 26 a to which the conductive terminal 26 b is fixed is disposed on the inner surface side of the terminal base 22, and is screwed and fixed to the terminal base 22 with two screws inserted from the outer surface side of the terminal base 22. As a result, the conductive terminal 26 b is sandwiched between the terminal base 26 a and the terminal base 22. The stud bolt 26 c protrudes outward through an opening 112 formed in the terminal base 22. The stud bolt 26 c projects vertically from the surface of the terminal base 22. A portion of the conductive terminal 26 b located around the stud bolt 26 c is exposed to the outside through the opening 112. Thereby, the negative output terminal 26 is oriented in a direction perpendicular to the outer surface of the terminal base 22. The upper end portion of the conductive terminal 26 b including the through hole 110 is exposed to the outside through the opening 114 formed in the upper end portion of the terminal base 22.

  The positive output terminal 24 is configured similarly to the negative output terminal 26. That is, the positive electrode output terminal 24 has a terminal base 24 a and a conductive terminal 24 b fixed to the terminal base 24 a, and the terminal base 24 a is fixed to the inner surface side of the terminal base 22 with screws. The stud bolt 24c of the terminal base 24a that functions as a connecting portion protrudes outward through an opening 116 formed in the terminal base 22. The stud bolt 24 c protrudes vertically from the surface of the terminal base 22. A portion of the conductive terminal 26 b located around the stud bolt 26 c is exposed to the outside through the opening 112. Thereby, the positive electrode output terminal 24 is oriented in a direction perpendicular to the outer surface of the terminal base 22. The upper end portion of the conductive terminal 24 b including the through hole 118 is exposed to the outside through the opening 120 formed in the upper end portion of the terminal base 22.

  The terminal base 22 to which the positive electrode output terminal 24 and the negative electrode output terminal 26 are attached is screwed and fixed to the front end wall 10a of the case 10 with a plurality of screws, and is in close contact with the front surface of the case 10. The positive output terminal 24 is sandwiched between the terminal base 22 and the front surface of the case 10, and the upper end portion of the positive output terminal 24 is between the positive output end portion 76 b of the positive bus bar 76 and the front surface of the case 10. It is inserted and positioned so as to overlap with the positive output side end portion 76b. The upper end portion of the positive output terminal 24 is connected to the positive output by a pair of through holes formed in the positive output end portion 76b and a pair of screws screwed into the terminal base 24a through the through holes 118 of the conductive terminal 24b. It is fixed to the end portion 76b with screws. Thus, the positive electrode output terminal 24 is electrically and mechanically connected to the positive electrode bus bar 76.

  The upper end portion of the negative electrode output terminal 26 is inserted between the negative electrode side output end portion 77b of the negative electrode bus bar 77 and the front surface of the case 10, and is positioned so as to overlap the negative electrode side output end portion 77b. The upper end portion of the negative electrode output terminal 26 is output by a pair of through holes formed in the negative electrode side output end portion 77b and a pair of screws screwed into the terminal base 26a through the through holes 110 of the conductive terminal 26b. It is fixed to the end 77b with screws. Thereby, the negative output terminal 26 is electrically and mechanically connected to the negative bus bar 77.

  As described above, the positive output terminal 24 and the negative output terminal 26 can be attached to the common terminal base 22 to improve the assemblability. Each of the positive electrode output terminal 24 and the negative electrode output terminal 26 is configured such that a terminal base fixed to the terminal base 22 is interposed between the bus bar and the conductive terminal, and a connection stud bolt is provided on the terminal base. By doing so, when an output harness or the like is attached to or detached from the stud bolt, the load acting on the conductive terminal and the bus bar can be reduced. Thereby, it becomes possible to prevent a deformation | transformation, damage, etc. of a conductive terminal and a bus bar.

  The positive output terminal 24 and the negative output terminal 26 of the interface unit 21 described above are provided side by side on the front side of the case 10, and both terminals protrude forward. The arrangement positions and orientations of the positive electrode output terminal 24 and the negative electrode output terminal 26 are set so as to be suitable for any device on which the secondary battery device is mounted.

  On the other hand, when the secondary battery device is mounted on another device, the interface unit 21 is configured as a unit suitable for the other device. As shown in FIGS. 8 and 9, the interface unit 21 includes a rectangular plate-like terminal base 22, and this terminal base 22 is detachably attached to the outer surface side of the front end wall 10 a of the case 10. On the outer surface of the terminal base 22, a battery monitoring board 28 is fixed by screwing. One end of each wiring board 98 described above is electrically connected to the battery monitoring board 28 via a connector or the like (not shown). The battery monitoring board 28 detects and monitors the voltage of the cell unit C. Moreover, the battery monitoring board 28 has a balance adjustment circuit, and adjusts the voltage balance between the single cells.

  A positive output terminal 24 and a negative output terminal 26 are attached to the terminal base 22. In FIG. 8, the positive electrode output terminal 24 and the negative electrode output terminal 26 are provided side by side on the left side edge of the terminal base 22 and face the left side. That is, the positive electrode output terminal 24 and the negative electrode output terminal 26 are parallel to the terminal base 22 and face the same direction.

  The negative electrode output terminal 26 is formed of a plate base made of stainless steel or the like and is erected vertically with respect to the terminal base 22, and is formed of a metal having high conductivity such as copper, and overlaps the terminal base 26a. And a fixed plate-like conductive terminal 26b. A stud bolt 26c functioning as a connecting portion is provided upright at the center of the terminal base 26a, and extends toward the left side and in parallel with the surface of the terminal base 22. One end of the conductive terminal 26 b is fixed to the terminal base 26 a with the stud bolt 26 c passing therethrough, and is positioned substantially perpendicular to the terminal base 22. The conductive terminal 26b extends from the terminal base 26a through the terminal base 22 to the upper end edge of the terminal base.

  The positive electrode output terminal 24 is formed of a terminal base 24a that is formed in a plate shape of stainless steel or the like and is erected vertically to the terminal base 22, and a metal having high conductivity such as copper, and overlaps the terminal base 24a. And a fixed plate-like conductive terminal 24b. A stud bolt 24c functioning as a connecting portion is erected at the center of the terminal base 24a and extends toward the left side. The stud bolt 24 c extends in parallel with the negative-side stud bolt 26 c and in parallel with the surface of the terminal base 22. One end of the conductive terminal 24 b is fixed to the terminal base 24 a with the stud bolt 24 c passing therethrough, and is positioned substantially perpendicular to the terminal base 22. The conductive terminal 24b extends from the terminal base 24a through the terminal base 22 to the upper end edge of the terminal base.

  The terminal base 22 to which the positive electrode output terminal 24 and the negative electrode output terminal 26 are attached is screwed and fixed to the front end wall 10a of the case 10 with a plurality of screws, and is in close contact with the front surface of the case 10. The upper end portion of the positive electrode output terminal 24 is inserted between the positive electrode side output end portion 76b of the positive electrode bus bar 76 and the front surface of the case 10, and is positioned so as to overlap the positive electrode side output end portion 76b. The upper end of the positive output terminal 24 is fixed to the positive output end 76b with screws. Thus, the positive electrode output terminal 24 is electrically and mechanically connected to the positive electrode bus bar 76.

  The upper end portion of the negative electrode output terminal 26 is inserted between the negative electrode side output end portion 77b of the negative electrode bus bar 77 and the front surface of the case 10, and is positioned so as to overlap the negative electrode side output end portion 77b. The upper end of the negative output terminal 26 is fixed to the negative output end 77b with screws. Thereby, the negative output terminal 26 is electrically and mechanically connected to the negative bus bar 77.

  As described above, it is possible to easily mount and connect the secondary battery device to another external device by attaching the interface unit 21 having different arrangement positions and orientations of the output terminals 24 and 26 to the case 10. .

  FIG. 10 and FIG. 12 show a secondary battery device provided with an interface unit 21 that is suitable for other devices. The interface unit 21 includes a rectangular plate-like terminal base 22, and the terminal base 22 is detachably attached to the outer surface side of the front end wall 10 a of the case 10. On the outer surface of the terminal base 22, the battery monitoring board 28 is fixed by screwing. One end 98a of each wiring board 98 described above is electrically connected to the battery monitoring board 28 via a connector or the like (not shown). The battery monitoring board 28 detects and monitors the voltage of the cell unit C. Moreover, the battery monitoring board 28 has a balance adjustment circuit, and adjusts the voltage balance between the single cells.

  The terminal base 22 is attached with a positive output terminal 24 and a negative output terminal 26 formed of a metal having high conductivity such as copper. The positive electrode output terminal 24 and the negative electrode output terminal 26 are arranged separately on the left and right side edges of the terminal base 22 in FIG. In other words, the positive electrode output terminal 24 and the negative electrode output terminal 26 are parallel to the terminal base 22 and face opposite directions.

  On both the left and right sides of the terminal base 22, rectangular block-shaped bases 24a and 26a are formed integrally with the terminal base and project from the surface of the terminal base. A stud bolt 24c is fixed to the base 24a, and extends from the base 24c to the right side in the drawing and substantially parallel to the surface of the terminal base 22. One end 24 b of the positive electrode output terminal 24 is fixed to the base 24 a with the stud bolt 24 c passing therethrough and is positioned substantially perpendicular to the terminal base 22. The positive output terminal 24 extends from the base 24a through the terminal base 22 to the upper end edge of the terminal base.

  A stud bolt 26c is fixed to the other base 26a, and extends from the base 26c to the left side in the drawing and substantially parallel to the surface of the terminal base 22. That is, the two stud bolts 24c and 26c are arranged substantially coaxially and are arranged in opposite directions.

  One end portion 26 b of the negative output terminal 26 is fixed to the side surface of the base 26 a with the stud bolt 26 c passing therethrough, and is positioned substantially perpendicular to the terminal base 22. The negative output terminal 26 extends from the base 26a through the terminal base 22 to the upper end edge of the terminal base.

  The terminal base 22 to which the positive electrode output terminal 24 and the negative electrode output terminal 26 are attached is screwed and fixed to the front end wall 10a of the case 10 with a plurality of screws, and is in close contact with the front surface of the case 10. The upper end portion of the positive electrode output terminal 24 is inserted between the positive electrode side output end portion 76b of the positive electrode bus bar 76 and the front surface of the case 10, and is positioned so as to overlap the positive electrode side output end portion 76b. The upper end of the positive output terminal 24 is fixed to the positive output end 76b with screws. Thus, the positive electrode output terminal 24 is electrically and mechanically connected to the positive electrode bus bar 76.

  The upper end portion of the negative electrode output terminal 26 is inserted between the negative electrode side output end portion 77b of the negative electrode bus bar 77 and the front surface of the case 10, and is positioned so as to overlap the negative electrode side output end portion 77b. The upper end of the negative output terminal 26 is fixed to the negative output end 77b with screws. Thereby, the negative output terminal 26 is electrically and mechanically connected to the negative bus bar 77.

  As described above, it is possible to easily mount and connect the secondary battery device to another external device by attaching the interface unit 21 having different arrangement positions and orientations of the output terminals 24 and 26 to the case 10. .

  According to the secondary battery device configured as described above, an interface unit having an appropriate output terminal position is provided for each device in which the secondary battery device is mounted, and the interface unit is attached to the casing of the battery device, and By adopting an electrically connected configuration, if one type of housing is prepared as a standard battery module, the secondary battery device can be adapted to various devices without changing the design of the housing body. It becomes possible. Therefore, when mass-producing a standard secondary battery device, if only the interface unit is designed to be compatible with the device on which the secondary battery device is mounted, the housing and main body of the device will be changed according to the device. There is no need. Therefore, it is possible to provide a secondary battery device capable of reducing the manufacturing cost and shortening the design and shipping period.

  In addition, this invention is not limited to embodiment mentioned above, In an implementation stage, it can embody by deform | transforming a component in the range which does not deviate from the summary. In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. Some constituent elements may be deleted from all the constituent elements shown in the embodiments, or constituent elements over different embodiments may be appropriately combined.

  For example, the interface unit 21 is not limited to the front wall of the case 10 and may be attached to another position of the housing. As shown in FIG. 12, the interface unit 21 may be attached to the upper surface side of the case 10 or may be attached to the side wall of the case 10. In the interface unit 21, the connecting portion is not limited to the stud bolt, and a nut 40 fixed to the output terminal may be used as shown in FIG.

  In addition, the interface unit is configured to include one positive output terminal and one negative output terminal. However, the interface unit is not limited thereto. For example, the interface unit includes a plurality of positive output terminals or a plurality of negative output terminals each connected to a single cell. It may be. Further, when the interface unit is arranged at a position away from the connection terminal on the case side, the output terminal of the interface unit and the connection terminal on the case side may be connected by a cable or a bus bar. The housing is not limited to a rectangular box shape, and may have other shapes. Furthermore, the internal structure of the housing, for example, the arrangement structure of the single cells and the connection structure of the bus bars are not limited to the above-described embodiments, and can be variously modified.

10 ... Case, 12 ... Single cell, 14 ... Center case, 16 ... Lower case,
18 ... Upper case, 20 ... Top cover, 21 ... Interface unit,
22 ... Terminal base, 24 ... Positive output terminal, 26 ... Negative output terminal,
24a, 26a ... terminal base, 24b, 26b ... conductive terminals,
24c, 26c ... stud bolt, 28 ... battery monitoring board,
30 ... Exterior container, 32a ... Positive electrode terminal, 32b ... Negative electrode terminal, 76 ... Positive electrode bus bar,
77 ... Negative electrode bus bar, 78 ... Common bus bar, 80 ... Bus bar unit

Claims (9)

The body,
A plurality of single cells housed in the enclosure;
A positive electrode and a negative electrode connection terminal respectively connected to the single cell and provided in the housing;
A base attached to the housing, and an interface unit provided on the base and electrically connected to the connection terminal and having positive and negative output terminals to which an external device can be connected;
A secondary battery device comprising:   The secondary battery device according to claim 1, wherein the base is detachably attached to the housing.   The secondary battery device according to claim 2, wherein the casing is formed in a rectangular parallelepiped shape, and the interface unit is attached to any one of outer surfaces of the casing.   The said base is formed in plate shape, contacts the outer surface of the said housing | casing, is attached to a housing | casing, The output terminal of the said positive electrode and negative electrode has faced the direction orthogonal to the surface of the said base. The secondary battery device described.   The said base is formed in plate shape, contacts the outer surface of the said housing | casing, and is attached to a housing | casing, The output terminal of the said positive electrode and negative electrode has faced the direction parallel to the surface of the said base. The secondary battery device described.   The secondary battery device according to claim 5, wherein the output terminals of the positive electrode and the negative electrode face the same direction.   The secondary battery device according to claim 5, wherein the positive and negative output terminals face opposite directions.   The secondary battery device according to claim 1, wherein the interface unit includes a stud bolt or a nut fixed to the output terminal.   The secondary battery device according to claim 1, wherein the interface unit includes a battery monitoring board that is attached to the base and monitors a voltage of the single cell.

Images