JP2013037777A - Battery connection structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a battery connection structure which is excellent in assemblability and can be manufactured by a simple and inexpensive manufacturing method.SOLUTION: A battery connection structure 11 comprises: a flexible sheet-like base body 18; and a plurality of bus bars 15 each of which connects electrodes 14 of adjacent battery cells 13. The bus bars 15 are fixed onto the base body 18 in an aligned manner. As mentioned above, the base body 18 is made of a flexible sheet material so that the battery connection structure 11 can be bent freely. The battery connection structure 11 can be assembled easily because dimensional tolerance can be absorbed by making the entire part of the battery connection structure 11 bendable. Further, the manufacturing cost can be reduced because it is not necessary to prepare a large mold or the like to form the base body 18.

Description

  The present invention relates to a configuration of a battery connection structure in which a plurality of bus bars for connecting electrodes of battery cells are integrated together.

  A battery as a high output power source provided in an electric vehicle or the like is configured by connecting a plurality of battery cells in series. In recent years, miniaturization of batteries has been demanded, and battery cell assembly technology has become important.

  For example, Patent Document 1 discloses a configuration in which electrodes of a plurality of battery cells arranged side by side are connected by a battery connection plate. The battery connection plate includes a housing made of synthetic resin (a board portion as referred to in Patent Document 1) and a plurality of bus bars. In the housing, a plurality of bus bar accommodating portions are formed side by side. And the said bus bar is embed | buried under this bus-bar accommodating part.

  Patent Document 1 discloses a configuration in which pitch adjusting means is provided in the housing. In Patent Document 1, a slight difference in the pitch between the electrodes of the battery assembly is absorbed by the pitch adjusting means, and the assembly is facilitated.

JP 2000-149909 A

  Since the housing of the battery connection plate disclosed in Patent Document 1 is made of resin, it is considered that the battery connection plate is molded using a mold. However, since this housing is formed long in the direction in which the battery cells are arranged, a very large mold is required to mold the housing. Therefore, the battery connection plate described in Patent Document 1 has a problem that the manufacturing cost increases.

  Further, since this housing is a long part, it is conceivable that warpage more than expected occurs and the assemblability is significantly lowered. When the warped housing is forcibly attached to the battery, the pitch adjusting means may be cracked. In addition to this, there is a possibility that the pitch adjusting means becomes weak and breaks depending on changes in resin molding conditions, use environment conditions, and the like. If the pitch adjusting means is damaged in this way, there is a problem that the number of man-hours for dismantling during recycling increases.

  Moreover, patent document 1 is set as the structure which embeds a bus-bar in a housing by insert molding. However, in the case of the configuration in which the bus bar is insert-molded in this way, the housing molding process becomes complicated, for example, a process of arranging the bus bar in the mold for resin molding becomes necessary. As a result, there is a problem that the manufacturing cost of the battery connection plate further increases. Further, if the bus bar is insert-molded in the housing, there is a problem that the bus bar cannot be separated during recycling.

  Note that Patent Document 1 also discloses a configuration in which a bus bar is fixed by fitting to a bus bar housing portion formed in a housing. In the case of this configuration, it is necessary to inspect whether the bus bar is completely fitted to the housing, and there is a problem that it takes time and effort.

  The present invention has been made in view of the above circumstances, and a main object of the present invention is to provide a battery connection structure that is excellent in assemblability and can be manufactured by a simple and inexpensive manufacturing method.

Means and effects for solving the problems

  The problems to be solved by the present invention are as described above. Next, means for solving the problems and the effects thereof will be described.

  According to an aspect of the present invention, the following configuration is provided in a battery connection structure for connecting a plurality of battery cells arranged side by side in series. That is, this battery connection structure includes a flexible sheet-like base body and a plurality of bus bars for connecting the electrodes of the adjacent battery cells. The plurality of bus bars are fixed side by side on the base body.

  In this way, by making the base body a flexible sheet material, the battery connection structure can be freely bent. Since the dimensional tolerance can be absorbed by making the whole battery connection structure bendable, the battery connection structure can be easily assembled. Therefore, it is not necessary to form the pitch adjusting means as in Patent Document 1 on the base body, and there is no problem that the pitch adjusting means is damaged. In addition, since a large mold or the like is not required to form the base body, the manufacturing cost can be suppressed.

  The battery connection structure is preferably configured as follows. That is, the base body is composed of two sheet materials, and the bus bar is sandwiched between the two sheet materials. The bus bars are fixed to the base body by bonding the sheet materials together.

  Thereby, a bus bar can be reliably fixed with respect to a base body.

  In the battery connection structure described above, the bus bar may be configured to be attached to the surface of the base body with an adhesive material.

  Thereby, a bus bar can be easily fixed with respect to a base body.

  The battery connection structure described above can also be configured as follows. That is, the base body has a plurality of pockets that can accommodate the bus bars. The bus bar is fixed to the base body by being accommodated in the pocket.

  Thereby, a bus bar can be fixed to a base body, without using means, such as a lamination process and adhesion | attachment. Further, according to this configuration, since the bus bar and the base body can be easily separated by taking out the bus bar from the pocket, the separation can be easily performed during recycling.

  The battery connection structure described above can also be configured as follows. That is, this battery connection structure is configured as a flexible printed circuit board. The bus bar is configured as a pad of the flexible printed circuit board.

  Since the flexible printed circuit board is thin and formed in a sheet shape and has flexibility, it can be used as the battery connection structure of the present invention. Also, the bus bar can be easily configured by using the pad portion of the flexible printed circuit board as the bus bar.

  In the above battery connection structure, it is preferable that an energization check circuit pattern for confirming whether each bus bar is energized is formed on the flexible printed board.

  That is, when the battery connection structure is formed of a flexible printed board, it is easy to form a circuit pattern on the flexible printed board. Therefore, by forming a circuit for checking the energization of the bus bar, it is possible to easily check the energization of the bus bar.

  The battery connection structure is preferably configured as follows. That is, the base body is formed in a tape shape. The bus bars are arranged side by side in the longitudinal direction of the tape-like base body. And the said base body in the state by which the said bus-bar is arrange | positioned is wound up by the core body.

  Thus, by winding the battery connection structure configured in a tape shape around the core material, it is possible to store the battery connection structure in a compact manner. Thereby, the cost can be reduced when the battery connection structure is transported.

  The battery connection structure described above can also be configured as follows. That is, the bus bar is formed to extend in a direction orthogonal to the direction in which the bus bars are arranged. The base body is formed by extrusion molding in a direction orthogonal to the direction in which the bus bars are arranged.

  Thus, the battery connection structure can be formed at low cost by extruding the base body.

The disassembled perspective view which shows the use condition of a battery connection structure. The top view of the battery connection structure of 1st Embodiment. The perspective view which shows a mode that a bus bar is pinched | interposed into two sheet | seat materials. The perspective view which shows a mode that the battery connection structure was wound up by the reel. The top view of the battery connection structure which concerns on the modification of 1st Embodiment. The perspective view of the battery connection structure which concerns on 3rd Embodiment. The perspective view of the battery connection structure which concerns on 4th Embodiment.

  Next, a first embodiment of the present invention will be described with reference to the drawings.

  First, the usage state of the battery connection structure according to the present embodiment will be described. FIG. 1 is an exploded perspective view of an electric vehicle battery 10 using the battery connection structure 11 of the present embodiment. The battery 10 is mainly composed of a battery connection structure 11 of the present embodiment and a battery body 12.

  The battery body 12 is composed of a plurality of battery cells 13. Each battery cell 13 has an electrode 14 on the front side and the back side. One of the two electrodes 14 of each battery cell 13 is a positive electrode, and the other is a negative electrode. Each electrode 14 is formed as a metal bar-like member that protrudes toward the front side or the back side, and a screw is cut around it. As will be described later, a nut 17 can be fastened to the electrode 14.

  The battery cells 13 are arranged side by side on the left and right. Moreover, it arrange | positions so that the plus and minus of the electrode 14 may be reversed by the adjacent battery cells 13. FIG. That is, the battery cells 13 are arranged so that positive electrodes and negative electrodes are alternately arranged.

  One battery connection structure 11 is arranged on each of the front side and the back side of the battery body 12. The battery connection structure 11 is for connecting a plurality of battery cells 13 in series. Thereby, a plurality of battery cells 13 can be used together as one battery 10.

  Next, the configuration of the battery connection structure 11 will be described.

  The battery connection structure 11 includes a plurality of bus bars 15. The bus bar 15 is a member for connecting the electrodes 14 of two adjacent battery cells 13 and is made of a metal plate. As shown in FIGS. 2 and 3, two insertion holes 16 are formed in each bus bar 15. The distance between the centers of the two insertion holes 16 is substantially matched with the distance between the axial centers of the electrodes 14 of the two adjacent battery cells 13.

  The electrodes 14 of the two adjacent battery cells 13 are inserted into the insertion holes 16 formed in the bus bar 15. Then, the bus bar 15 is screwed to the electrode 14 by tightening the nut 17 with respect to the electrode 14 inserted through the insertion hole 16 as shown in FIG. Thereby, the bus bar 15 and the electrode 14 are physically and electrically connected. In FIG. 1, only the state in which the nut 17 is fastened to one electrode 14 is illustrated, but in reality, the bus bars 15 are screwed to all the electrodes 14.

  The battery connection structure 11 includes a base body 18. The base body 18 is configured as a sheet-like member having flexibility (having flexibility). In the present specification, the “sheet shape” means a shape that is formed with a substantially constant thickness as a whole and does not have a reinforcing portion such as a thick portion or a rib portion. The material of the base body 18 is not particularly limited as long as it has insulating properties and flexibility, but in this embodiment, the base body is configured by a synthetic resin film sheet.

  As shown in FIG. 3, the base body 18 of the present embodiment is configured by overlapping two flexible sheet materials 18a and 18b. A plurality of bus bars 15 are arranged between the two sheet materials 18a and 18b. The bus bar 15 is fixed to the base body 18 by bonding (adhering) the sheet materials 18a and 18b to each other with the bus bar 15 sandwiched between the two sheet materials 18a and 18b. The The method of bonding the two sheet materials 18a and 18b is not particularly limited, but a known laminating method using an appropriate means such as heat seal or adhesive can be used. Since the laminating process and the like can be performed fully automatically, the battery connection structure 11 can be mass-produced at a low cost. In addition, the material of the two sheet materials 18a and 18b constituting the base body 18 may be the same or may be made of different materials.

  As shown in FIGS. 2 and 4, the base body 18 of the present embodiment is formed in a tape shape (elongate strip shape) (that is, the base body 18 is a laminate tape, and each bus bar 15 is a laminate tape. It can be said that it is sandwiched between and fixed). The plurality of bus bars 15 are arranged at predetermined intervals along the longitudinal direction of the base body 18. The predetermined interval referred to here is an interval such that the interval between the center positions of the insertion holes 16 of each bus bar 15 substantially coincides with the interval between the axial centers of the electrodes 14 of the battery cells 13 arranged side by side. . However, the bus bars 15 may be arranged at a slightly wider or narrower interval than this. Thereby, the bus bar 15 is fixed to the base body 18 at an appropriate interval, and the battery connection structure 11 itself is configured in a tape shape.

  The tape-shaped battery connection structure 11 can be wound around a core body such as a reel 19 as shown in FIG. By winding the battery connection structure 11 on a reel as described above, the battery connection structure 11 can be accommodated and transported in a compact manner. When the battery 10 is assembled, the battery connection structure 11 having a necessary length is pulled out from the reel 19 and cut into a predetermined length. Thereby, the battery connection structure 11 having a length necessary for assembling the battery 10 can be obtained.

  When the battery connection structure 11 is assembled to the battery body 12, as shown in FIG. 1, the longitudinal direction of the battery connection structure 11 (the direction in which the bus bars 15 are arranged) and the direction in which the battery cells 13 are arranged are The electrodes 14 are inserted through the insertion holes 16 of the bus bar 15 while being parallel. As described above, since the battery connection structure 11 is configured such that the interval between the insertion holes 16 and the interval between the electrodes 14 are substantially the same, the plurality of electrodes 14 can be easily inserted into the plurality of bus bars 15. I can go. As described above, by integrating the plurality of bus bars 15 into one battery connection structure 11, the plurality of bus bars 15 can be collectively assembled to the battery body 12. Thereby, the assembly work of the battery 10 can be performed efficiently.

  As shown in FIGS. 2 and 3, an opening hole 20 is formed in the sheet material 18 a, 18 b constituting the base body 18 at a position corresponding to the position of the insertion hole 16 of each bus bar 15. Thereby, the electrode 14 of the battery cell 13 can penetrate the base body 18. The opening hole 20 is formed larger than the insertion hole 16 formed in the bus bar 15. Accordingly, a part of the bus bar 15 sandwiched between the two sheet materials is exposed to the outside through the opening hole 20. Thus, since the bus bar 15 is exposed from the base body 18, when the bus bar 15 and the electrode 14 are screwed with the nut 17, a contact area between the bus bar 15 and the nut 17 or the electrode 14 is ensured. be able to.

  Next, the effect by the battery connection structure 11 of this embodiment is demonstrated in detail.

  As described above, in the configuration of Patent Document 1 in which the bus bar is held in the resin housing, there is a problem in that a large mold is required to mold the housing, which is costly. In this regard, the battery connection structure 11 of the present embodiment has a configuration in which a plurality of bus bars 15 are arranged and fixed to a sheet-like base body 18 without using a housing as in Patent Document 1. Therefore, in order to manufacture the battery connection structure 11 of the present embodiment, a mold or the like for molding the housing is not necessary, so that the battery connection structure 11 can be configured at low cost. Moreover, it is also possible to divert a commercially available sheet material (film tape etc.) to the base body 18, and also in this case, cost can be reduced.

  Further, when a large housing is resin-molded as in Patent Document 1, the housing may be warped more than expected, and the assemblability may be significantly reduced. In this respect, since the base body 18 of the battery connection structure 11 of the present embodiment is formed in a sheet shape, deformation such as warpage is unlikely to occur. Moreover, even if some deformation occurs in the base body 18, the deformation can be absorbed by the flexibility of the base body 18 itself. Thus, in the battery connection structure 11 of the present embodiment, the base body 18 is not deformed and the assemblability is not deteriorated, so that the battery connection structure 11 can be easily assembled to the battery body 12. it can.

  In the battery connection structure 11 of the present embodiment, since the base body 18 itself has flexibility, the entire base body 18 can be flexibly deformed. Because of this flexibility, the dimensional tolerance of the battery cell 13 can be absorbed, so that the battery connection structure 11 can be easily attached to the electrode 14. Moreover, the deformation | transformation of the base body 18 can absorb the vibration etc. which are received when the vehicle body travels. As described above, in the battery connection structure 11 of the present embodiment, the entire base body 18 is flexibly deformed and can absorb accumulated tolerances, vibrations, and the like, so that it is not necessary to provide pitch adjusting means as in Patent Document 1. Therefore, the problem of the configuration of Patent Document 1 that the pitch adjusting means becomes weak and breaks does not occur.

  Patent Document 1 discloses a configuration in which the bus bar is fixed to the housing by fitting. In this case, it is necessary to check whether the bus bar is completely fitted. This is because if the bus bar is lifted from the housing, the bus bar and the electrode cannot be properly connected. In this respect, in the battery connection structure 11 of the present embodiment, the bus bar 15 is sandwiched between the two sheet materials 18a and 18b and fixed by laminating or the like, so that the bus bar 15 is lifted from the base body 18. There is no worry that it will end up. Therefore, the above inspection is not necessary.

  As described above, the battery connection structure 11 of the present embodiment is for connecting a plurality of battery cells 13 in series, and is configured as follows. That is, the battery connection structure 11 includes a flexible sheet-like base body 18 and a plurality of bus bars 15 for connecting the electrodes 14 of adjacent battery cells 13. A plurality of bus bars 15 are arranged and fixed on the base body 18.

  In this way, by making the base body 18 a flexible sheet material, the battery connection structure 11 can be freely bent. Since the dimensional tolerance can be absorbed by making the entire battery connection structure 11 bendable, the battery connection structure 11 can be easily assembled. Therefore, it is not necessary to form the pitch adjusting means as in Patent Document 1 on the base body 18, and there is no problem that the pitch adjusting means is damaged. Further, since a large mold or the like is not required for forming the base body 18, the manufacturing cost can be suppressed.

  Further, the battery connection structure 11 of the present embodiment is configured as follows. That is, the base body 18 is composed of two sheet materials 18a and 18b, and the bus bar 15 is sandwiched between the two sheet materials 18a and 18b. The bus bars 15 are fixed to the base body 18 by bonding the sheet materials 18a and 18b to each other.

  Thereby, the bus bar 15 can be reliably fixed to the base body 18.

  Further, the battery connection structure 11 of the present embodiment is configured as follows. That is, the base body 18 is configured in a tape shape. The bus bars 15 are arranged side by side in the longitudinal direction of the tape-like base body 18. The base body 18 in which the bus bar 15 is arranged is wound around the reel 19.

  Thus, by winding the battery connection structure 11 configured in a tape shape around the reel 19, the battery connection structure 11 can be stored in a compact manner. Thereby, cost can be reduced when the battery connection structure 11 is transported.

  Next, a modification of the above embodiment will be described with reference to FIG. In addition, about the structure same or similar to the said embodiment, the same code | symbol is attached | subjected to drawing and description is abbreviate | omitted.

  Similar to the battery connection structure 11 of the first embodiment, the battery connection structure 31 of this modification is configured by sandwiching the bus bar 15 between the base bodies 18 made of two sheets. However, in this modification, the bus bar 15 is formed by extending in the direction (vertical direction in FIG. 5; hereinafter referred to as the extending direction) perpendicular to the direction in which the bus bars 15 are arranged (the horizontal direction in FIG. 5). Yes. Thereby, the base body 18 can be formed by extrusion molding.

  Specifically, it is as follows. That is, the bus bars 15 formed by extending in the extending direction are arranged at predetermined intervals in a direction orthogonal to the extending direction (left and right direction in FIG. 5). Then, the bus bar 15 is sandwiched between the two sheet materials, and the base body 18 is formed by extrusion lamination molding. The extrusion direction is a direction parallel to the stretching direction. Thereby, the battery connection structure 31 can be formed continuously in the extending direction. When the battery 10 is assembled, the battery connection structure 31 of this modification is cut by a straight line parallel to the direction in which the bus bars 15 are arranged (a straight line indicated by reference numeral 32 in FIG. 5), so that the battery connection structure having a necessary shape is obtained. 31a can be obtained. Thus, by manufacturing the battery connection structure 31 as an extruded product, the manufacturing cost of the battery connection structure 31 can be reduced.

  As described above, in the battery connection structure 31 of the present modification, the bus bar 15 is formed to extend in a direction orthogonal to the direction in which the bus bars are arranged. The base body 18 is formed by extrusion in a direction orthogonal to the direction in which the bus bars 15 are arranged.

  Thus, the battery connection structure 31 can be formed at low cost by extruding the base body 18.

  Next, a second embodiment of the present invention will be described. In addition, about the structure same or similar to said embodiment, the code | symbol same as the said embodiment is attached | subjected and description is abbreviate | omitted.

  In the second embodiment, the method of fixing the bus bar 15 to the base body 18 is different from that of the first embodiment. That is, in the present embodiment, the base body 18 is constituted by a single sheet material having flexibility. And the bus-bar 15 is fixed to the surface of this base body with an adhesive material. Although an adhesive material is not specifically limited, For example, an adhesive agent may be used and a double-sided tape may be used. As described above, the method of fixing the bus bar 15 to the base body 18 is not limited to the method of the first embodiment in which the bus bar 15 is sandwiched between two sheet materials, and any appropriate means can be used.

  According to the configuration of the second embodiment, the bus bar 15 can be fixed to the base body 18 more easily than the configuration in which the bus bar 15 is sandwiched between two sheets as in the first embodiment. Further, with this configuration, the bus bar 15 is not sandwiched between the two sheet materials, so that one surface of the bus bar 15 is completely exposed. Therefore, the bus bar 15 and the electrode 14 or the nut 17 can be reliably brought into contact with each other. Thereby, the reliability of the electrical connection between the battery cells 13 by the bus bar 15 can be improved.

  As described above, in the battery connection structure of the present embodiment, the bus bar 15 is attached to the surface of the base body 18 with the adhesive material.

  Thereby, the bus bar 15 can be easily fixed to the base body 18.

  Next, a third embodiment of the present invention will be described with reference to FIG. In addition, about the structure same or similar to said embodiment, the code | symbol same as the said embodiment is attached | subjected and description is abbreviate | omitted.

  In the battery connection structure 33 of the third embodiment, the base body 34 is configured by a known embossed tape. Since the embossed tape 34 is formed of a thin and flexible material, it can be used as the base body of the present invention. In the embossed tape 34, a number of pockets 35 that can accommodate the bus bars 15 are formed along the longitudinal direction of the embossed tape 34. By accommodating the bus bar 15 in this pocket, the bus bar 15 is fixed to the base body (embossed tape) 34. The pockets 35 are formed at a predetermined interval. That is, the pockets 35 are formed so that the distance between the centers of the insertion holes 16 of the bus bars 15 accommodated in the pockets 35 substantially matches the distance between the axial centers of the electrodes 14 of the battery cells 13. Therefore, by accommodating the bus bar 15 in the pocket 35, the bus bar 15 can be arranged at an appropriate interval.

  Thus, in the battery connection structure 33 of the present embodiment, the base body 34 has a plurality of pockets 35 that can accommodate the bus bars 15. The bus bar 15 is fixed to the base body 34 by being accommodated in the pocket 35.

  Thereby, the bus bar 15 can be fixed to the base body 34 without using means such as laminating and bonding. Further, according to this configuration, by removing the bus bar 15 from the pocket 35, the bus bar 15 and the base body 34 can be easily separated, so that separation can be easily performed during recycling.

  As shown in FIG. 6, the embossed tape 34 can be wound around the reel 19 in a state where the bus bar 15 is accommodated in the pocket 35. Thus, by winding the battery connection structure 33 on a reel, the battery connection structure 33 can be accommodated in a compact manner. When this battery connection structure 33 is used, the required length may be pulled out from the reel 19 and cut into a predetermined length as in the first embodiment.

  Next, a fourth embodiment of the present invention will be described with reference to FIG. In addition, about the structure same or similar to said embodiment, the code | symbol same as the said embodiment is attached | subjected and description is abbreviate | omitted.

  In the fourth embodiment, the entire battery connection structure 36 is constituted by a flexible printed circuit board. Specifically, the base body 18 of this embodiment is configured by a base film of a flexible printed circuit board. That is, since the base film of a flexible printed circuit board is a sheet-like member having flexibility, it can be used as the base body of the present invention. The pads formed on the flexible printed board are used as the bus bar 15. Thus, if a flexible printed circuit board is used, the battery connection structure 36 having flexibility can be easily configured.

  In the present embodiment, an energization check circuit pattern 37 is formed on the base body (base film of the flexible printed circuit board) 18. The energization check circuit pattern 37 is formed to connect each bus bar 15 and an energization check unit (not shown) for checking the energization of each bus bar 15. The energization check unit can be formed by mounting an indicator such as an LED for displaying the presence or absence of energization on the base body 18. However, the present invention is not limited thereto, and an energization check unit may be provided separately from the base body 18. Thus, by configuring the battery connection structure 36 as a flexible printed circuit board, it becomes easy to form a circuit pattern in the battery connection structure 36 to have various functions.

  As described above, the battery connection structure 36 of the present embodiment is configured as a flexible printed board. The bus bar 15 is configured as a pad of the flexible printed circuit board.

  Since the flexible printed board is thin and formed in a sheet shape and has flexibility, it can be used as the battery connection structure 36. Further, by using the pad portion of the flexible printed circuit board as the bus bar 15, the bus bar 15 can be easily configured.

  In the battery connection structure 36 of this embodiment, an energization check circuit pattern 37 for confirming whether each bus bar 15 is energized is formed on the flexible printed board.

  That is, in the present embodiment, since the battery connection structure 36 is constituted by a flexible printed board, it is easy to form a circuit pattern on the flexible printed board. Therefore, by forming a circuit for checking the energization of the bus bar 15, the energization check of the bus bar 15 can be easily performed.

  The preferred embodiments and modifications of the present invention have been described above, but the above configuration can be modified as follows, for example.

  Although two insertion holes are formed in the bus bar, a bus bar having one insertion hole may be arranged like the bus bar 15a arranged at both ends of the battery connection structure on the back side in FIG. .

  In FIG. 3 and the like, the state in which the bus bar 15 in which the insertion hole 16 is formed is fixed to the base body 18 is illustrated. However, the non-bus bus bar 15 is fixed to the base body 18 and then the bus bar 15 An insertion hole 16 may be formed in 15.

  In the battery connection structure wound by the reel or the battery connection structure formed by extrusion molding, it has been described that the battery connection structure having a necessary shape is obtained by cutting at a predetermined position. However, the present invention is not limited to this configuration, and the battery connection structure may be formed in a necessary shape from the beginning (the base body is formed in the necessary shape before fixing the bus bar). .

  The configuration of the present invention is not limited to batteries for electric vehicles, but can be widely used for applications in which battery cells are connected to each other.

DESCRIPTION OF SYMBOLS 10 Battery 11 Battery connection structure 13 Battery cell 14 Electrode 15 Bus bar 18 Base body

Claims (8)

In a battery connection structure for connecting a plurality of battery cells arranged side by side in series,
A sheet-like base body having flexibility;
A plurality of bus bars for connecting the electrodes of the adjacent battery cells;
With
The battery connection structure, wherein the plurality of bus bars are fixed side by side on the base body. The battery connection structure according to claim 1,
The base body consists of two sheet materials,
The bus bar is sandwiched between the two sheet members;
A battery connection structure, wherein the bus bar is fixed to a base body by bonding the sheet materials together. The battery connection structure according to claim 1,
The battery connection structure, wherein the bus bar is attached to the surface of the base body with an adhesive. The battery connection structure according to claim 1,
The base body has a plurality of pockets that can accommodate the bus bar,
The battery connection structure, wherein the bus bar is fixed to the base body by being accommodated in the pocket. The battery connection structure according to claim 1,
It is configured as a flexible printed circuit board,
The battery connection structure, wherein the bus bar is configured as a pad of the flexible printed circuit board. The battery connection structure according to claim 5,
A battery connection structure, wherein an energization check circuit pattern for confirming whether each bus bar is energized is formed on the flexible printed board. The battery connection structure according to any one of claims 1 to 4,
The base body is configured in a tape shape,
The bus bar is arranged side by side in the longitudinal direction of the tape-shaped base body,
The battery connection structure, wherein the base body in which the bus bar is disposed is wound around a core body. The battery connection structure according to claim 2,
The bus bar is formed to extend in a direction orthogonal to the direction in which the bus bars are arranged,
The battery connection structure, wherein the base body is formed by extrusion in a direction orthogonal to a direction in which the bus bars are arranged.

Images