JP2012138333A - Battery connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To smoothly perform a battery connecting operation.SOLUTION: A busbar holder 4 is formed by a body part 7 having busbar storage portions 15 capable of storing busbars 3, and a lid part 9 connected to the body part 7 by hinges 8. The busbars 3 have a clearance in the busbar storage portions 15 permitting a predetermined displacement in the direction of arrangement of batteries 1. If insertion holes 5 in any busbar 3 are not aligned with corresponding electrodes 2, the busbar 3 can be displaced in the arrangement direction to align the insertion holes 5 with the electrodes to be inserted. As to the displacement of the busbar 3, support pieces 6 protruded from the busbar fit in guide portions 16 formed in the body part 7 to support the displacement of the busbar 3.

Description

  The present invention relates to a battery connector.

  For example, a battery mounted on an electric vehicle or a hybrid vehicle is increasing in number as a battery assembly by combining a plurality of batteries. In this format, each battery is connected in series by a battery connector. As a battery connector, one having a configuration in which a plurality of connection conductors are incorporated in a holder made of an insulating material such as a synthetic resin is known. The following literature can be mentioned as such a specific example. Two insertion holes pass through the connection conductor in this device, so that adjacent electrodes of different polarities can be inserted.

Japanese Utility Model Publication No. 63-82370

  By the way, in the battery assembly, the variation in the distance between adjacent electrodes having different polarities becomes larger toward the both ends of the battery assembly. The cause is that the variation in the width of the battery itself and the variation in the size between the positive and negative electrodes of the battery are accumulated at both ends of the battery assembly. For this reason, since the battery connector is composed of a single member, there is a possibility that smooth connection work may be hindered due to a positional shift between the insertion hole of the connection conductor and the corresponding electrode. As a countermeasure, simply expanding the diameter of the insertion hole for the electrode can be considered. However, such a countermeasure reduces the contact area with the electrode, and there is a concern about heat generation due to an increase in electrical resistance.

  This invention is completed based on the above situations, Comprising: It aims at providing the battery connector which can perform the connection operation | work of a battery smoothly.

  As means for achieving the above object, the invention of claim 1 is a battery connector for connecting the batteries in series by arranging a plurality of batteries and connecting electrodes of different polarities of adjacent batteries. A plurality of bus bars that are formed of a conductive material through a pair of insertion holes that can be inserted into the electrodes having different polarities, and a bus bar holder that is capable of incorporating each bus bar and is formed of an insulating material. The bus bar holder is formed with a plurality of bus bar accommodating portions for assembling each bus bar at a plurality of locations along the battery arrangement direction, and the bus bar accommodating portion is formed with an opening on the side facing the electrode. The batteries are arranged in the bus bar accommodating portions with a displacement amount necessary to align the insertion hole and the electrode. Characterized in where possible displaced direction.

  According to a second aspect of the present invention, in the bus bar housing portion according to the first aspect, a pair of guide portions extending in the alignment direction are formed on both side surfaces along the alignment direction of the batteries in the bus bar housing portion. It is characterized in that guided portions that are slidably fitted to both guide portions are formed on both side edges facing the both guide portions.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the bus bar housing portion includes an elastic holding piece that holds the bus bar in a state where the bus bar is positioned at least in the same direction across the battery arrangement direction. The elastic holding piece is characterized in that the bus bar is formed so as to be deflectable in a direction allowing displacement in the arrangement direction.

  According to a fourth aspect of the present invention, in the bus bar holder according to any one of the first to third aspects, the bus bar holder is configured such that the bus bar housing portions are opened to the bus bar assembly side, and the bus bar is attached and detached. It has a feature in that it is provided with a main body portion that can be formed and a lid portion that can be attached to the main body portion and can open and close the bus bar housing portion.

  According to a fifth aspect of the present invention, in the method according to any one of the first to fourth aspects, the bus bar holder is formed of a synthetic resin material, while the bus bar is substantially pointed at the bus bar accommodating portion. It is characterized in that it is supported in contact or nearly line contact.

  According to a sixth aspect of the present invention, in the fifth aspect of the present invention, the bus bar housing portion is formed with a support protrusion for integrally supporting the bus bar in a point contact or line contact state. Has characteristics.

  According to a seventh aspect of the invention, in the fifth aspect, the bus bar is integrally formed with a protrusion that supports the bus bar itself in a point contact or line contact state with the bus bar housing portion. It has the characteristics.

  The invention according to an eighth aspect is the one according to any one of the fifth to seventh aspects, wherein the bus bar holder is configured such that the bus bar housing portions are opened to the assembly side of the bus bar and the bus bar is attached and detached. A main body portion that can be formed, and a lid portion that can be attached to the main body portion and can open and close the bus bar housing portion. The bus bar is in point contact with both the lid portion and the bus bar housing portion. Alternatively, it is characterized in that it is sandwiched and supported from the thickness direction in a line contact state.

<Invention of Claim 1>
According to the first aspect of the present invention, since the bus bar is configured to be displaceable over the stroke range in which the misalignment between the insertion hole and the electrode can be absorbed with respect to the bus bar holder, the bus bar is also provided at both ends of the bus bar assembly. The positions of the insertion holes and the electrodes can be aligned by appropriately displacing the holes. Therefore, the battery connection work can be performed smoothly.

<Invention of Claim 2>
According to the second aspect of the present invention, since the displacement operation of the bus bar is guided by the pair of guide portions provided on the bus bar holder, the displacement operation of the bus bar can be performed smoothly.

<Invention of Claim 3>
According to the invention of claim 3, since the bus bar is sandwiched by the elastic holding piece from the direction in which the batteries are arranged, that is, the direction in which the displacement of the bus bar is allowed, the rattling of the bus bar when the battery connector is used alone is restricted. can do.

<Invention of Claim 4>
According to the invention of claim 4, if the lid is opened, the bus bar can be mounted through the bus bar accommodating portion, so that the bus bar can be assembled easily.

<Invention of Claim 5>
Since the bus bar generates heat as the battery is energized, there is a concern that the resin bus bar holder in contact with the bus bar may be affected by heat generation. However, in the invention of claim 5, since the bus bar is supported in a point contact or line contact state with respect to the bus bar housing portion, it is possible to minimize the influence of heat.

<Invention of Claim 6>
According to the sixth aspect of the present invention, since the support protrusion for supporting the bus bar in a point contact or line contact state is formed integrally with the bus bar housing portion, the molding is easy and the number of parts does not increase.

<Invention of Claim 7>
According to the seventh aspect of the present invention, since the protrusion that supports the bus bar in a point contact or line contact state is formed on the metal bus bar, the protrusion can be protected from deformation or the like.

<Invention of Claim 8>
According to the invention of claim 8, the bus bar is supported by being pinched or supported in a point contact or line contact state from both the lid portion and the bus bar housing portion. Supported without rattling.

The fragmentary top view which shows the connection condition of the batteries which concern on Embodiment 1 Side sectional view showing a state where the bus bar holder is opened Side sectional view showing the state of mounting on the electrode Breaking view showing the operation of housing the bus bar by opening the bus bar holder Partial front view of battery connector The fracture view which shows the open state of the battery connector which concerns on Embodiment 2. FIG. Partial front view of battery connector The top view which shows the open state of the battery connector which concerns on Embodiment 3. Same partial front view Side sectional view with the lid closed The top view which shows the open state of the battery connector which concerns on Embodiment 4. FIG. Similarly, a cross-sectional side view with the lid closed The top view of the bus-bar which concerns on Embodiment 5. The front view which expands and shows the principal part in the state which closed the cover part similarly

<Embodiment 1>
1 to 5 show Embodiment 1 of the present invention. FIG. 1 shows a battery assembly B and a battery connector J1 that connects a plurality of small batteries 1 constituting the battery assembly B in series. Each small battery 1 is formed in a thin rectangular parallelepiped shape, and a type having a positive electrode and a negative electrode on the same end surface is adopted. Moreover, in each small battery 1, both the electrodes 2 are arrange | positioned at the substantially diagonal position.

  The battery assembly B is configured by arranging a plurality of small batteries 1 in a state in which the long side surfaces are in close contact with each other and bundling the whole with a binding belt (not shown) in that state. More specifically, in configuring the battery assembly B, each small battery 1 is such that the surface on which the electrodes 2 are provided faces in the same direction, and the positive and negative polarities of the electrodes 2 of the adjacent small batteries 1 are small. The batteries 1 are arranged in parallel so as to repeat alternately at a constant pitch interval along the arrangement direction of the batteries 1.

  Next, the battery connector J1 will be described. As shown in FIG. 1, the battery connector J1 is provided with a pair along the direction in which the electrodes 2 are arranged with respect to the battery assembly B. As shown in FIG. 2, each battery connector J1 includes a plurality of metal bus bars 3 and a synthetic resin bus bar holder 4 for incorporating them.

  Each bus bar 3 is formed of a rectangular flat plate material, and each is formed with a pair of insertion holes 5 through which the positive and negative electrodes 2 of the adjacent small battery 1 are inserted. Both insertion holes 5 are formed in a circular shape in accordance with the shape of each electrode 2 (screw shaft having a substantially circular cross section), and are formed to have a slightly larger hole diameter than the outside of each electrode 2. In addition, support pieces 6 (guided portions) are formed so as to protrude outwardly on both long side edges of each bus bar 3, one on each side. Each support piece 6 is arranged at a symmetrical position across the central axis in the length direction of the bus bar 3.

  The bus bar holder 4 includes a main body portion 7 and a lid portion 9 connected to the main body portion 7 through a hinge 8 so as to be opened and closed. The main body 7 has a pair of side walls 10 extending along the direction in which the small batteries 1 are arranged, a pair of end face walls (not shown) that connect both ends of the side walls 10 in the length direction, and the side walls 10 are spaced apart from each other. The connecting wall 11 is connected to each other, and is formed in a long frame shape as a whole. On the side wall 10 on the side of the bus bar holder 4 where the hinges 8 are not provided, lock receiving portions 12 are projected at regular intervals. Each lock receiving portion 12 is formed penetrating in the height direction.

  On the other hand, the lid portion 9 is formed in a flat plate shape capable of closing the entire top surface of the bus bar holder 4, and is a plurality of hinges intermittently arranged on one side wall 10 of the bus bar holder 4 corresponding to the connecting wall 11. 8 can be opened and closed. On the long side of the lid portion 9 on the side where the hinge 8 is not provided, a lock claw 13 is formed to protrude corresponding to each lock receiving portion 12. Each lock claw 13 is inserted into the corresponding lock receiving portion 12 when the lid portion 9 is closed, and is latched to the lower edge portion of the lock receiving portion 12, so that the entire lid portion 9 can be held in a locked state. .

  Further, a window hole 14 is opened in the lid portion 9 at a position corresponding to each bus bar 3. The window hole 14 is formed with a smaller opening area than the bus bar 3, and when the bus bar 3 is accommodated in the bus bar accommodating part 15, the peripheral part of the bus bar 3 overlaps with the peripheral part of the window hole 14 in plan view. I have to do it. This overlapping range is set to such an extent that the overlapping state is maintained even if the bus bar 3 is displaced within the set range.

  A bus bar accommodating portion 15 for accommodating the bus bar 3 is provided between the connecting walls 11 in the bus bar holder 4. That is, each bus bar accommodating portion 15 is arranged at regular intervals along the length direction, and each bus bar accommodating portion 15 is formed to open in both directions in the height direction, and the bus bar 3 is on the upper surface side (the side closed by the lid portion 9). ). In a state where the bus bar 3 is fitted in the bus bar accommodating portion 15, a slight clearance is held between both side edges in the longitudinal direction of the bus bar 3 and both side walls 10 of the bus bar holder 4. It can be displaced in the width direction within the range. Similarly, in the accommodated state of the bus bar 3, a predetermined clearance is set between both short sides of the bus bar 3 and the corresponding connecting wall 11, and the bus bar 3 is in the longitudinal direction within the clearance, that is, The battery can be displaced in the direction in which the batteries are arranged.

  In each bus bar accommodating portion 15, four guide portions 16 are formed at the upper end edge of both side walls 10 corresponding to the respective support pieces 6 of the bus bar 3. Each guide portion 16 is formed to open to the upper surface side, and the support piece 6 can be supported by the bottom surface. The length of each guide portion 16 in the longitudinal direction is longer than the width of each support piece 6, and the bus bar 3 is allowed to be displaced in the length direction with respect to the bus bar accommodating portion 15. The permissible stroke is set to an amount capable of absorbing a positional deviation expected between the electrode 2 and the insertion hole 5 of the bus bar 3 to be described later, and the short side of the bus bar 3 and the connecting wall 11 described above. It is set to almost the same as the clearance between.

  As shown in FIG. 3, the depth dimension of each guide portion 16 is set to be substantially equal to the thickness of the bus bar 3, and when the lid portion 9 is closed, each support piece 6 is connected to the inner surface of the lid portion 9 and the guide portion 16. As a result, the bus bar 3 is restricted from rattling in the thickness direction. Furthermore, the dimension in the plate thickness direction of each guide portion 16 is set so that the support piece 6 does not protrude outward from the bus bar holder 4 even when the bus bar 3 is displaced in the width direction within the clearance.

  Next, the effect of this embodiment comprised as mentioned above is demonstrated concretely. The assembly work of the battery connector J1 will be described. First, as shown in FIG. 3, a cylindrical spacer member 17 is fitted into each electrode 2 (see FIG. 3). On the other hand, the lid 9 of the bus bar holder 4 is opened and the bus bar 3 is accommodated in each bus bar accommodating portion 15. In this case, each support piece 6 of the bus bar 3 is placed on the bottom surface of the corresponding guide portion 16 and the lid portion 9 is closed. When the lock claw 13 is inserted into the lock receiving portion 12, the lock receiving portion 12 bulges and deforms outward, and the lock claw 13 can penetrate. As a result, the lock claw 13 is moved to the lower edge of the lock receiving portion 12. Each bus bar 3 is incorporated in the bus bar holder 4 by being locked to the portion.

  When the battery connector J1 thus obtained is connected to the battery assembly B, the polarity of the electrode 2 of the small battery 1 located closest to the end of the battery assembly B and the polarity of the adjacent small battery 1 The different electrodes 2 are fitted into the corresponding insertion holes 5 of the corresponding bus bar 3. The electrode 2 of the small battery 1 corresponding to the insertion hole 5 of the other bus bar 3 is automatically inserted along with the fitting operation which becomes the reference of such an operation.

However, as the distance from the reference position is increased, the amount of misalignment between the electrode 2 of the small battery 1 and the corresponding insertion hole 5 of the bus bar 3 increases, so that it becomes impossible to insert the electrode 2 as it is. In such a case, the target bus bar 3 is manually displaced in the bus bar accommodating portion 15 by hand.
At this time, the bus bar 3 can be displaced in the arrangement direction of the small batteries 1 based on the clearance between the support piece 6 and the guide portion 16 and the clearance between the short side of the bus bar 3 and the connecting wall 11. Further, based on the clearance between the long side of the bus bar 3 and both side walls, the bus bar 3 can be displaced in a direction intersecting with the arrangement direction of the small batteries 1. Therefore, the positional deviation can be easily adjusted by appropriately adjusting these displacement directions in accordance with the state of deviation between the insertion hole 5 and the electrode 2. Even if the bus bar 3 is displaced in any direction, the bus bar 3 can be smoothly adjusted because each support piece 6 is guided to move along the guide portion 16.

  After performing the above operation on the two electrode rows in the battery assembly B, if all the electrodes 2 are tightened with the nuts 18, the connection operation of the battery connector J1 is completed. Further, since the bus bar 3 is supported from below by the spacer member 17, there is no possibility that the bus bar 3 is deformed due to excessive tightening of the nut 18.

  As described above, according to the first embodiment, each bus bar 3 is incorporated in the bus bar accommodating portion 15 so as to be displaceable along the direction in which the small batteries 1 are arranged, so that the positional deviation between the electrode 2 and the insertion hole 5 is absorbed. can do. Further, since the bus bar 3 is displaced while the support pieces 6 are guided along the guide portions 16, the displacement operation of the bus bar 3 can be performed smoothly.

<Embodiment 2>
6 and 7 show Embodiment 2 of the present invention. In the second embodiment, an elastic holding piece 19 is provided on the main body portion 7A of the bus bar holder 4A so as to hold the bus bar 3A in a positioned state.

  First, the bus bar 3A in the second embodiment is different from that in the first embodiment in that the support bar 6 is not provided and a pair of recesses 20 are cut out in the center of both side edges on the long side. is there. Each recess 20 is formed so that the frontage gradually expands outward.

  Since the bus bar 3A does not have the support piece 6, the side wall 10A in each bus bar accommodating portion 15A is formed with a total of four receiving pieces 21 each in a pair on one side, and the bus bar 3A is substantially The four corner positions are supported from the lower surface side. Further, in each bus bar housing portion 15A, a positioning projection 22 is formed to project inward at the center in the longitudinal direction of both side walls 10A. Each positioning projection 22 is formed to have a shape corresponding to the recess 20, that is, gradually taper toward the tip. A predetermined clearance is set between each positioning protrusion 22 and the corresponding recess 20, and displacement in a predetermined range is allowed in both the longitudinal direction of the bus bar 3 </ b> A and the direction crossing the bus bar 3 </ b> A.

  A pair of elastic holding pieces 19 is provided on each side wall 10A of each bus bar housing portion 15A. Each elastic holding piece 19 is formed in a cantilever shape by slits 23 being cut into the both side walls 10A from three directions, and can be flexibly deformed inward and outward with respect to the main body portion 7A. The elastic holding pieces 19 that are paired in the direction in which the small batteries 1 are arranged are separated from each other along the longitudinal direction from the end of the bus bar accommodating portion 15A near the center in the longitudinal direction as a fulcrum. It extends in the direction, and the extended end side is a free end.

  A holding claw 24 protrudes inward from the free end of each elastic holding piece 19. A tapered pressure contact surface 25 is formed on the inner surface of each holding claw 24 so as to rise upward toward the tip side.

In a state in which the bus bar 3A is incorporated in the bus bar housing portion 15A, the bus bar 3A is configured such that the four corners thereof are substantially in contact with all the press contact surfaces 25 surrounding them. That is, each bus bar 3A is incorporated in a state where it is automatically positioned at the center of the bus bar housing portion 15A. However, at this time, each elastic holding piece 19 is in a natural state (of course, each elastic holding piece 19 may be in a bent state).
Since other configurations are the same as those of the first embodiment, the same reference numerals are given in the drawings and description thereof is omitted.

  In the second embodiment configured as described above, each bus bar 3A is positioned at the center of the bus bar accommodating portion 15A from the four sides by the elastic holding pieces 19, so that when the battery connector J2 is in a single state, the bus bar 3A. The rattling can be avoided. In addition, since the initial position of the bus bar 3A is always at the center position of the bus bar housing portion 15A, the amount of movement at the time of deviation adjustment can be reduced. Further, since the four elastic holding pieces 19 surrounding the bus bar 3A can be independently bent, the moving direction of the bus bar 3A at the time of adjusting the displacement is not limited to the direction in which the small batteries 1 are arranged, Angular displacement around the center of the bus bar 3A can also be allowed.

<Embodiment 3>
8 to 10 show Embodiment 3 of the present invention. As shown in FIG. 8, the basic configuration of the battery connector J3 of the third embodiment is the same as that of the second embodiment. Therefore, common components are given the same reference numerals and description thereof is omitted.

  This embodiment and Embodiment 2 differ in the bus bar holder 4B. The difference between the two is that a main body side support protrusion 30 is formed to protrude at the center of the upper surface (surface on the side supporting the bus bar 3A) of all receiving pieces 21B arranged in each bus bar accommodating portion 15B. The point and the point which is the inner surface of the cover part 9B and the cover part side support protrusion 31 are formed in the position corresponding to each main body part side support protrusion 30.

  The support protrusions 30 and 31 on either side are also formed in a substantially hemispherical shape. The lid-side support protrusion 31 is positioned directly above the main-body-side support protrusion 30 when the lid 9B is closed with respect to the main-body part 7B, and the bus bar 3A is plated together with the main-body-side support protrusion 30. The support protrusions 30 and 31 are sandwiched from the thickness direction so as to come into contact with the bus bar 3A in a point contact state.

  According to the third embodiment configured as described above, the bus bar 3A is accommodated in the bus bar accommodating portion 15B with the lid portion 9B opened, and the portions near the four corners are supported by the main body side support protrusions 30. Supported. Next, the lid portion 9B is closed and the lock claw 13 is engaged with the lock receiving portion 12, whereby the lid portion 9B is locked in the closed state. As the lid portion 9B is closed, the bus bar 3A is clamped in a point contact state from the plate thickness direction by the support protrusions 30 and 31 on the main body side and the lid portion side. As a result, the bus bar 3A is positioned in a state where there is almost no backlash in the thickness direction. At this time, the four corners of the bus bar 3A are elastically contacted with the pressure contact surfaces 25 of the respective elastic holding pieces 19, so that the bus bar 3A is positioned at the center of the bus bar accommodating portion 15B.

  Also in the third embodiment, as in the second embodiment, the position of the bus bar 3A can be adjusted in any of the direction in which the batteries are arranged and the direction crossing the battery. During this time, the bus bar 3A has the support protrusions 30, 31. Displaces while rubbing against. As described above, since the bus bar 3A is in a point contact state with respect to the support protrusions 30 and 31, the sliding resistance when adjusting the position of the bus bar 3A is small. Therefore, the displacement of the bus bar 3A is smooth, and the work of absorbing the displacement between the battery electrode 2 and the insertion hole 5 can be performed smoothly.

  In addition, when the battery assembly B is connected to various electric devices and energized, the bus bar 3A generates heat. In the present embodiment, the bus bar 3A is supported by the support protrusions 30 and 31 in a point contact state. Therefore, the situation where the influence of heat generation reaches the bus bar holder 4B is effectively mitigated. In addition, since the bus bar 3A is in a point contact or non-contact state with the pressure contact surface 25 of each elastic holding piece 19 when connected to the battery 1, heat transfer through each elastic holding piece 19 is more effective. Is suppressed.

<Embodiment 4>
11 and 12 show Embodiment 4 of the present invention. As shown in FIG. 11, the basic configuration of the battery connector J4 of the fourth embodiment is the same as that of the first embodiment. Therefore, common components are given the same reference numerals and description thereof is omitted.

  This embodiment is different from the first embodiment in the configuration of the bus bar holder 4C. The difference between the two is that a main body side support protrusion 30C is formed to protrude along the longitudinal direction on the upper surface of each guide portion 16C on the bus bar holder 4C side, and the inner surface of the lid portion 9C. The side-side protrusions 32 are formed so as to project from the point where the lid-side support protrusions 31C protrude in the same direction at positions corresponding to the support protrusions 30C, and the inner surfaces of both side walls 10C of the bus bar holder 4C. Is a point.

  Each of the support protrusions 30C and 31C on the main body 7C side and the lid 9C side has a rib shape having a predetermined length, and is formed so that the cross section has an arc shape. The lid-side support projection 31C is located directly above the main-body-side support projection 30C when the lid 9C is closed with respect to the main-body 7C, and each of the bus bars 3 together with the main-body-side support projection 30C. The support piece 6 is sandwiched from the plate thickness direction, and any of the support protrusions 30C and 31C is in contact with each support piece 6 in a line contact state.

  The side protrusions 32 are formed in two ribs in the height direction so as to protrude from the inner edge of the side walls 10C of the bus bar holder 4C at the upper edge of the portion sandwiching the guide portions 16C in the length direction. . Each side protrusion 32 is formed in an arc shape in cross section. In this embodiment, the bus bar 3 does not come into contact with the side protrusions 32 when the central axis thereof is aligned with the longitudinal central axis of the bus bar accommodating portion 15C, but the bus bar 3 is biased in the width direction. The long side edge of the bus bar 3 is in line contact with the side protrusion 32 on one side located in the bias direction.

  In this embodiment, the clearance in the length direction between each support piece 6 and the guide portion 16C and the clearance between both short sides of the bus bar 3 and the inner wall on the short side of the bus bar accommodating portion 15C are as follows. A dimension longer than the maximum stroke assumed for the position adjustment is secured. Therefore, even when the position of the bus bar 3 is adjusted, the support piece 6, the guide portion 16C, the short side of the bus bar 3, and the short side inner wall of the bus bar accommodating portion 15C do not collide with each other in the longitudinal direction.

  Also in the fourth embodiment configured as described above, the position of the bus bar 3 can be adjusted in any of the direction in which the batteries 1 are arranged and the direction intersecting the battery 1 with the lid portion 9C closed. Sometimes, the bus bar 3 and the support protrusions 30C and 31C on the lid side and the main body side are in a line contact state, so that the bus bar 3 can be smoothly displaced.

  Even if the bus bar 3 generates heat, the bus bar 3 is in a line contact state between the lid portion 9C and the main body portion 7C in the height direction, and is not in contact with the side protrusion 32 in the width direction. Since it is a line contact state, the situation where the influence of heat generation reaches the bus bar holder 4C is effectively mitigated.

<Embodiment 5>
13 and 14 show Embodiment 5 of the present invention. The basic configuration of the battery connector J5 of this embodiment is the same as that of the first embodiment. Common components are denoted by the same reference numerals and description thereof is omitted.

  In the third and fourth embodiments, the configuration (support protrusion) for supporting the bus bar in a point contact or line contact state is formed on the bus bar holder side. However, in the fifth embodiment, this support structure is provided on the bus bar 3D side. Is provided on each support piece 6D.

In the present embodiment, three protrusions 34a and 34b are provided for each support piece 6D. These protrusions 34a and 34b are arranged in parallel at equal intervals along the longitudinal direction of the bus bar 3D in each support piece 6D. Each protrusion 34a, b is formed by knocking out from the upper surface side and the lower surface side of the support piece 6D, and both are formed so as to protrude in a hemispherical shape. Further, as shown in FIG. 14, the protrusions 34a and 34b arranged on the support pieces 6D have their protruding directions alternately opposite in the longitudinal direction. That is, the protrusions 34a and 34a located at both ends in the longitudinal direction in the figure are knocked out from the upper surface side to the lower surface side, and the protrusion 34b located at the center is beaten from the lower surface side to the upper surface side. Has been issued. As a result, in each support piece 6D, the projections 34a and 34a located at both ends abut on the bottom surface of the guide portion 16 in a point contact state, and the projection 34b located in the center abuts on the inner surface of the lid portion 9.
Other configurations are the same as those of the first embodiment, and the same reference numerals are given and detailed description thereof is omitted.

  Also in the fifth embodiment configured as described above, the position of the bus bar 3D can be adjusted, and the bus bar 3D has a main body portion 7 (guide portion 16) and a lid portion 9 by the projections 34 provided on the bus bar 3D. On the other hand, since it is supported in a point contact state, it is possible to effectively avoid the situation where the heat generated in the bus bar 3D is transmitted to the bus bar holder 4 side.

  Further, since each protrusion 34 is formed on the metal bus bar 3D, an effect that the protrusion 34 can be protected from being scraped or deformed can be exhibited.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) In the above embodiment, the lid portion 9 is integrally connected to the main body portion 7 by the hinge 8, but may be configured separately.
(2) In the said embodiment, although the small battery 1 of the type by which the positive / negative electrode 2 was distribute | arranged to the same end surface was illustrated, this invention is applicable also to the small battery 1 of a type distribute | arranged to a different end surface.

(3) In the above-described embodiment, the case where the guide portion 16 is formed to penetrate the main body portion of the battery connector J1 or J2 in the inner or outer direction is shown, but the guide portion 16 is not necessarily penetrated and is formed to be recessed on the inner surface. It may be.
(4) In the second embodiment, the elastic holding pieces 19 are formed on the both side walls 10A of the bus bar accommodating portion 15A. Instead, they are formed on the connecting wall 11 and sandwiched between both short sides of the bus bar 3A. Good. Of course, such an arrangement may be used in combination.
(5) In the third embodiment, when the lid portion 9B is closed, the lid portion side support projection 31 is also brought into contact with the bus bar 3A so as to reliably prevent rattling in the plate thickness direction. There may be some clearance. From the standpoint of alleviating heat transfer, the lid-side support protrusion 31 is not essential.

  (6) In the fourth embodiment, each of the support protrusions 30C, 31C is formed in an arc shape in cross section, but may be in a triangular shape with a sharp tip.

  (7) In the fourth embodiment, even when the position of the bus bar 3 is adjusted in the longitudinal direction, the setting is made so as not to contact the bus bar housing portion 15C with respect to the longitudinal direction. In that case, it is desirable to provide a structure that makes point contact or line contact with the bus bar 3 at the contact point.

  (8) Although the three protrusions 34 are provided in parallel on each support piece 6D in the fifth embodiment, a single rib-like protrusion extending in the length direction may be provided instead.

DESCRIPTION OF SYMBOLS 1 ... Small battery 2 ... Electrode 3, 3A, 3D ... Bus bar 4, 4A, 4B, 4C ... Bus bar holder 5 ... Insertion hole 6, 6D ... Supporting piece (guided part)
7, 7A, 7B, 7C ... body part 9, 9B, 9C ... lid part 15, 15A, 15B, 15C ... busbar housing part 16, 16C ... guide part 19 ... elastic holding piece 30, 30C ... body part side support protrusion 31, 31C ... Lid support side projections 34a, b ... Projections B ... Battery assembly J1, J2, J3, J4, J5 ... Battery connector

Claims (8)

A battery connector for connecting the batteries in series by connecting electrodes of different polarities of adjacent batteries arranged side by side,
A plurality of bus bars formed of a conductive material through a pair of insertion holes that can be inserted into the electrodes having different polarities, and a bus bar holder that can be assembled with each bus bar and formed of an insulating material,
The bus bar holder is formed at a plurality of locations along the battery arrangement direction in which the bus bar accommodating portion for incorporating each bus bar is formed, and the bus bar accommodating portion is formed with an opening facing the electrode,
The battery connector is characterized in that each bus bar can be displaced in the direction in which the batteries are arranged within the bus bar accommodating portion with a displacement amount necessary to align the insertion hole and the electrode.   In the bus bar accommodating portion, a pair of guide portions extending in the alignment direction are formed on both side surfaces along the alignment direction of the batteries, and both side edges of the bus bar facing the both guide portions are formed on the both guide portions. The battery connector according to claim 1, wherein a guided portion is formed so as to be slidably fitted therein.   The bus bar housing portion is provided with an elastic holding piece that holds the bus bar in a state of being sandwiched at least from the battery arranging direction and positioned in the same direction, and the elastic holding piece allows the bus bar to be displaced in the arrangement direction. The battery connector according to claim 1, wherein the battery connector is formed so as to be able to bend in a direction to be bent.   The bus bar holder includes a main body portion in which each bus bar housing portion is opened to the bus bar assembly side so that the bus bar is detachable, and a lid that can be attached to the main body portion and can open and close the bus bar housing portion. The battery connector according to any one of claims 1 to 3, wherein a battery connector is provided.   5. The bus bar holder is formed of a synthetic resin material, and the bus bar is supported in a substantially point contact or substantially line contact state in the bus bar housing portion. The battery connector according to claim 1.   The battery connector according to claim 5, wherein a support protrusion for supporting the bus bar in a point contact or line contact state is integrally formed on the bus bar housing portion.   The battery connector according to claim 5, wherein the bus bar is integrally formed with a protrusion that supports the bus bar itself in a point contact or line contact state with the bus bar housing portion. The bus bar holder includes a main body portion in which each bus bar housing portion is opened to the bus bar assembly side so that the bus bar is detachable, and a lid that can be attached to the main body portion and can open and close the bus bar housing portion. With
The said bus-bar is clamped and supported from the plate | board thickness direction in the state of point contact or line contact with both the said cover part and the said bus-bar accommodating part, The any of Claim 5 thru | or 7 supported. The battery connector according to claim 1.

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