JP6317898B2 - Bus bar module - Google Patents

Description

  The present invention relates to a bus bar module, and more particularly to a technique for improving the waterproofness of electric wires accommodated in the bus bar module.

  For example, Patent Document 1 discloses a technique in which a battery assembly in which a plurality of batteries are stacked and connected in series is used as a power source for an electric vehicle or a hybrid car. As shown in FIG. 7, this type of battery assembly includes a plurality of bus bars 101 that connect positive and negative electrodes of adjacent batteries (not shown), and a plurality of voltage detection terminals that overlap each bus bar 101. 103 and a bus bar module 109 configured by housing a plurality of electric wires 105 connected to each voltage detection terminal 103 in a resin case 107, respectively.

  The case 107 includes a plurality of accommodating chambers 111 that accommodate the bus bars 101 and the voltage detection terminals 103 that overlap the bus bars 101, a crimp portion (not shown) of each voltage detection terminal 103, and an electric wire crimped to the crimp portion. A plurality of wire housing chambers 113 for housing 105 and a wire routing path 115 for routing the plurality of wires 105 extracted from the wire housing chamber 113 are provided.

  The storage chamber 111 is formed inside the enclosure wall 117 that rises in a cylindrical shape from the bottom plate of the case 107, and each bus bar 101 and the voltage detection terminal 103 that overlaps the bus bar 101 are fitted and held inside the enclosure wall 117. In addition, an opening through which the positive electrode column and the negative electrode column pass is provided in the bottom plate inside the enclosure wall 117. The electric wire accommodation chamber 113 communicates with the accommodation chamber 111 and the electric wire routing path 115, and is provided between a pair of side walls 119 rising from the bottom plate of the case 107. The electric wire routing path 115 is provided along the longitudinal direction of the case 107.

  On the other hand, in this type of bus bar module 109, for example, a droplet (water droplet or the like) generated by condensation or the like may move into the electric wire accommodation chamber 113 through the electric wire 105 due to a capillary phenomenon. However, since the crimping portion of the voltage detection terminal 103 and the electric wire 105 are tightly accommodated in a narrow space, the electric wire accommodating chamber 113 tends to collect liquid droplets. For example, the core wire of the electric wire 105 is exposed to the liquid for a long time. There is a risk.

  On the other hand, Patent Document 2 discloses a voltage detection terminal shown in FIG. The voltage detection terminal 121 is formed to include a bus bar contact portion 123 that is overlapped with the bus bar 101, a wire connection portion 125 that is connected to the core wire of the electric wire 105, and a pair of connecting portions 127 that connect them. The electric wire connecting portion 125 is provided with two pairs of press contact pieces 129a and 129b standing upright, and when the electric wire 105 is press-fitted between them, the press contact pieces 129a and 129b break through the insulation coating of the electric wire 105, respectively. It is electrically connected to (conductor).

  For example, as shown in FIG. 9, the voltage detection terminal 121 in FIG. 8 is accommodated in the accommodation chamber 111 of the case 107 shown in FIG. 7 in a state where the bus bar contact portion 123 is overlapped with the bus bar 101. The electric wires 105 that are in pressure contact with the pressure contact pieces 129a and 129b are respectively accommodated and routed in the electric wire accommodating portions 129 formed along the enclosure wall 117 of the accommodating chamber 111, and then drawn out to the electric wire routing path 115. It is. According to this, since the space density of the connection part of the core wire of the electric wire 105 and the electric wire connection part 125 can be made small, and also the exposed area of a core wire can be reduced, the core wire of the electric wire 105 is exposed to a liquid. Can be suppressed.

  By the way, in the case of Patent Document 2, the voltage detection terminal 121 is loaded in the pressing direction when the electric wire 105 is pressed against the electric wire connecting portion 125. For example, the electric wire connecting portion 125 is deformed or the voltage detecting terminal 121 is used. May cause misalignment. For this reason, in Patent Document 2, as shown in FIG. 10, a structure in which the electric wire connecting portion 125 is accommodated and supported in the accommodating groove 137 of the case 107 formed by the pair of groove side surfaces 133 and the groove bottom 135 is adopted. Has been.

JP 2013-4501 A International Publication No. 2011/043261

  However, as shown in FIG. 10, when the electric wire connecting portion 125 is accommodated and supported in the accommodating groove 137, the liquid generated by condensation or the like tends to accumulate in the gap between the electric wire connecting portion 125 and the accommodating groove 137. As a result, the wire connecting portion 125 is exposed to the liquid for a long time, and the liquid accumulated in the gap may be brought into contact with the core wire of the electric wire 105 connected to the pressure contact piece 129 through the wire connecting portion 125. There is.

  This invention makes it a subject to suppress the contact with a liquid and the conductor of an electric wire.

In order to solve the above-described problem, a bus bar module according to the present invention includes a plurality of bus bars that connect adjacent positive electrodes and negative electrodes of a plurality of batteries in which positive electrodes and negative electrodes are alternately arranged, and connect these batteries in series. A plurality of terminals that are respectively overlapped with these bus bars, a plurality of electric wires that are respectively connected to these terminals, and a resin case that accommodates the plurality of bus bars, the plurality of terminals, and the plurality of electric wires. The terminal includes a bus bar contact portion that is overlapped with the bus bar, and an electric wire connection portion that is electrically connected to the conductor of the electric wire, and the electric wire connection portion supports a connection end portion of the electric wire. And a pair of side walls erected from both side edges of the bottom plate , and disposed between the first projection and the second projection provided on the case , wherein the case is a bottom plate of the wire connection portion. The support part that contacts and supports Made, it is assumed that the space is formed between the wire connecting portion, except the supporting portion.

  According to this, since the area where the wire connecting portion and the support portion abut can be reduced, it is possible to suppress the accumulation of liquid along the wire connecting portion. Therefore, it can prevent that a liquid contacts the core wire of an electric wire along an electric wire connection part.

  In this case, the case is formed with a recess or an opening at a position facing the wire connecting portion except for the support portion, and the recess or opening is continued to a position near the wire connecting portion. Shall be formed.

  According to this, since an electric wire connection part can be provided in the space of a case, the liquid adhering to an electric wire connection part can be discharged | emitted through space. Therefore, it can suppress more reliably that a liquid accumulates along an electric wire connection part.

  The terminal has an elastic member protruding from the electric wire connecting portion, and the elastic member intersects the supporting portion of the case when the electric wire connecting portion is brought into contact with the supporting portion. The case is formed so as to be able to come into contact with the side wall that rises, and the case is provided with a protrusion on the side wall that is elastically deformed by the elastic member climbing when the wire connection portion is brought close to the support portion. The elastic member is assumed to be elastically restored and engaged when the electric wire connecting portion is accommodated in a normal position with respect to the case.

  According to this, for example, when the electric wire is connected to the electric wire connecting portion, even if the electric wire connecting portion is pressed against the support portion side, the elastic member presses the side wall. Can be suppressed.

  Further, the terminal is formed by connecting the bus bar contact portion and the wire connecting portion via a connecting portion, and the bus bar faces the connecting portion when the bus bar contact portion of the terminal is overlapped. It is assumed that it is formed by cutting out the position to be and its vicinity.

  According to this, since it can suppress that a liquid moves along the clearance gap between a connection part and a bus bar, it can prevent that such a liquid contacts the core wire of an electric wire.

  ADVANTAGE OF THE INVENTION According to this invention, the contact with a liquid and the conductor of an electric wire can be suppressed.

It is an assembly drawing which attaches the bus bar module of this invention to a battery assembly. It is a top view which expands and shows the 1st storage chamber of the bus bar module of this invention. It is a perspective view which shows the state which piled up the voltage detection terminal on the bus bar. It is a top view which expands and shows a part of back side of FIG. It is an enlarged view of the cross-sectional direction of the electric wire connection part accommodated in the case. It is a perspective view of the back surface side of FIG. It is a perspective view of the conventional bus bar module. It is a perspective view which shows the state which connected the electric wire to the conventional voltage detection terminal. It is a top view which expands and shows the 1st storage chamber of the conventional bus bar module. It is an enlarged view of the cross-sectional direction of the electric wire connection part accommodated in the conventional case.

  Hereinafter, a bus bar module to which the present invention is applied will be described with reference to the drawings. The bus bar module of the present embodiment is mounted on, for example, an electric vehicle that travels by the driving force of the electric motor, a hybrid vehicle that travels by the driving force of both the engine and the electric motor, and the power source that supplies power to the electric motor. It is applied to the device.

  As shown in FIG. 1, the battery assembly 12 to which the bus bar module 11 of the present embodiment is attached is configured by connecting a plurality of batteries 13 in the arrangement direction and connecting them in series. In FIG. 1, an arrow X indicates the arrangement direction of the plurality of batteries 13, that is, the longitudinal direction of the battery assembly 12. In the present embodiment, the right side in FIG. 1 is referred to as the rear side in the arrangement direction of the batteries 13, and the left side is referred to as the front side in the arrangement direction of the batteries 13. An arrow Y indicates the height direction of each battery 13 and battery assembly 12. In the present embodiment, the height direction is arranged in parallel with the gravity direction, and the downward direction of the arrow Y in FIG. 1, that is, the upward direction of the arrow Y is referred to as the upper side. An arrow Z indicates the width direction of each battery 13, that is, the width direction of the battery assembly 12.

  Each battery 13 is formed in a rectangular parallelepiped shape, and the positive electrode 14 protrudes from one surface among the surfaces (electrode surfaces) located on the opposite sides, and the negative electrode 15 protrudes from the other surface. Each electrode is formed in a cylindrical shape from a conductive metal and protrudes vertically from the electrode surface. Each electrode is formed with a thread groove.

  In the battery assembly 12, the positive electrodes 14 and the negative electrodes 15 of the adjacent batteries 13 are alternately arranged in a straight line. The battery assembly 12 includes, for example, among the batteries 13 positioned at both ends of an even number of batteries 13 connected in series, the positive electrode of one battery 13 is a total positive electrode, and the negative electrode of the other battery 13 is a total negative electrode. Become. In the present embodiment, an example in which the positive electrode 14 and the negative electrode 15 are provided on the opposite surfaces of each battery 13 will be described. However, the present invention is not limited to this example. May be provided on one surface (electrode surface).

  The bus bar module 11 includes a plurality of bus bars 16, a voltage detection terminal 17 which is a plurality of terminals respectively overlapped with each bus bar 16, a plurality of electric wires 18 respectively connected to the voltage detection terminals 17, and the plurality of Bus bar 16, a plurality of voltage detection terminals 17, and a case 19 that accommodates a plurality of electric wires 18.

  The case 19 is formed by molding synthetic resin or the like, and has a plurality of first accommodation chambers 20 in which the bus bars 16 and the voltage detection terminals 17 overlapping the bus bars 16 are accommodated. Each first storage chamber 20 is formed inside an enclosure wall 22 that rises in a cylindrical shape from the bottom plate 21 (FIG. 2) of the case 19. Adjacent first storage chambers 20 are connected to each other and arranged side by side in the arrangement direction of the batteries 13. The bottom plate of the first storage chamber 20 is provided with an electrode hole (not shown) through which the positive electrode 14 and the negative electrode 15 of the adjacent battery 13 are passed. Under each first storage chamber 20, an electric wire routing path 23 extending in the arrangement direction of the batteries 13 is provided adjacent to each first storage chamber 20. The electric wire routing path 23 is formed by a rectangular bottom plate 24 and a pair of side plates 25 that rise substantially parallel to each other from the side edges of the bottom plate 24.

  The bus bar 16 is formed by pressing a metal plate, and connects a plurality of batteries 13 in series by connecting a positive electrode 14 and a negative electrode 15 of adjacent batteries 13. As shown in FIG. 2, the bus bar 16 has a pair of bus bar holes 26a and 26b through which the positive electrode 14 and the negative electrode 15 adjacent to the metal plate are passed. The bus bar 16 is engaged with and engaged with the claw portions 27a to 27d of the first storage chamber 20, and the positive electrode 14 and the negative electrode 15 that are passed through a through hole (not shown) of the bottom plate 21 pass through the pair of bus bar holes 26a and 26b, respectively. The nut 28 (FIG. 1) is screwed to the positive electrode 14 and the negative electrode 15, respectively, so that the battery assembly 12 is fixed.

  The voltage detection terminal 17 is formed by pressing a metal plate, and as shown in FIG. 3, a bus bar contact portion 29 that is overlapped and connected to the bus bar 16, and an electric wire that is electrically connected to the electric wire 18. The connection part 30, and a pair of connection parts 31a and 31b for connecting the bus bar contact part 29 and the wire connection part 30 are integrally formed. The voltage detection terminal 17 is provided so as to overlap the inner side of the bus bar 16 in the arrangement direction of the batteries 13.

  As shown in FIG. 3, the bus bar contact portion 29 is formed in a plate shape, and is provided with a terminal hole 32 through which either the positive electrode 14 or the negative electrode 15 passes and an opening 33 for preventing rotation. Note that the opening 33 is for restricting the rotation of the voltage detection terminal 17 when the nut 28 is tightened by fitting a projection (not shown) protruding from the case 19 side. As shown, it can be omitted by locking the voltage detection terminal 17 with a plurality of claw portions 27.

  As shown in FIG. 3, the electric wire connecting portions 30 are erected from both end portions in the width direction of the bottom plate 34, and a pair of side plates 35 for positioning the electric wires 18 between each other and an inner side from the pair of side plates 35. Projecting from the two ends of the pair of connecting pieces 36a, 36b electrically connected to the conductor of the electric wire 18 and both ends of the bottom plate 34 in the width direction, and crimping the insulation coating of the electric wire 18 to the electric wire 18 A pair of caulking pieces 37 for fixing the two are integrally formed.

  The connection portions 31a and 31b rise substantially vertically from the opposite side surfaces (both side surfaces in the arrangement direction of the battery 13) of the bus bar contact portion 29, respectively, and the opposite side surfaces of the wire connection portion 30 (the wiring of the battery 13). Both end faces in the direction).

  As shown in FIG. 2, the case 19 is provided with an electric wire routing portion 38 for routing the electric wires 18 along the enclosure wall 22. The electric wire routing portion 38 is formed between an enclosure wall 22 on the back side (right side in FIG. 2) in the arrangement direction of the batteries 13 and an outer wall 39 erected facing the outside of the enclosure wall 22. .

  Each first storage chamber 20 is provided with a second storage chamber 40 adjacent thereto. The second storage chamber 40 is provided outside the enclosure wall 22, disposed above the bus bar 16 stored in the first storage chamber 20, and has a battery than the wire connection portion 30 of the voltage detection terminal 17. It is arrange | positioned at the near side of 13 arrangement directions. The second storage chamber 40 is provided with the first storage chamber 20 and the wall portion 41 separated from each other.

  The wall portion 41 is formed by rising from the bottom plate 21 of the case 19, similarly to the enclosure wall 22. On the upper surface of the wall portion 41, a guide portion 43 that guides the end portion 42 on the distal end side of the electric wire 18 through the electric wire connection portion 30 to the second storage chamber 40 is provided. The guide portion 43 has a pair of clamping portions 44 that press and clamp the electric wire 18. Thus, by accommodating the end 42 on the distal end side of the electric wire 18 in the second storage chamber 40 provided with the first storage chamber 20 and the wall 41 separated, the liquid contacts the end 42. Can be prevented.

Next, the characteristic configuration of the present embodiment will be described. In the present embodiment, the voltage detection terminal 17 is supported by the bus bar contact portion 29 being superimposed on the bus bar 16 and the electric wire connection portion 30 being in contact with the case 19. FIG. 4 is a view of the right half of FIG. 2 as viewed from the back side. The case 19 is provided with a plurality (two) of support portions 45a and 45b extending in a direction intersecting (substantially orthogonal) with the wiring direction of the electric wires 18 of the electric wire connecting portion 30. The support portions 45 a and 45 b are formed by bridging a rectangular opening 46 formed in the case 19. That is, the wire connection portion 30 is supported by the bottom plate 34 being in contact with only the support portions 45 a and 45 b of the case 19 in the opening 46, and the surface of the bottom plate 34 that is not in contact with the support portions 45 a and 45 b has the opening 46. It is arranged to face. The opening 46 continues to the periphery of the electric wire connection portion 30, that is, the vicinity of the position (region) facing the electric wire connection portion 30, and is divided into three regions by the support portions 45a and 45b. 4 represents an electrode hole formed in the bottom plate 21 of the case 19.

  On the other hand, as shown in FIG. 2, the front side of the case 19 is arranged along the arrangement direction of the batteries 13 from the bottom plate 21 surrounded by the connection portions 31 a and 31 b, the bus bar contact portion 29, and the wire connection portion 30. The protrusion 48 is raised. A pair of plate-like standing portions 49a and 49b are raised substantially parallel to each other on the first protrusion 48 so as to be substantially orthogonal to the first protrusion 48 (FIG. 5). A second protrusion 50 is raised on the bottom plate 21 on the upper side of the case 19 with the electric wire connection portion 30 in between along the arrangement direction of the batteries 13. That is, the electric wire connection part 30 is arrange | positioned between the 1st projection part 48 and the 2nd projection part 50 in the up-down direction.

  As shown in FIG. 5, the case 19 is provided with an opening 46, thereby forming a space 51 penetrating in the thickness direction of the case 19. The electric wire connection portion 30 is supported and supported across the space 51. Supporting portions 45a and 45b are provided. That is, a space 51 is formed between the case 19 and the wire connection part 30 except for the support part 45.

  Further, the voltage detection terminal 17 has an elastic member 52 that protrudes from the bottom plate 34 of the electric wire connection portion 30 to the opposite side to the bus bar contact portion 29. The elastic member 52 is formed by bending and rising in the direction opposite to the press-fitting direction of the electric wire 18 (the direction of the arrow in FIG. 5), and is substantially orthogonal to the support portion 45 when the voltage detection terminal 17 is assembled. The side wall 53 facing the space 51 is in contact with the side wall 53. The side wall 53 is provided with a protruding portion 56 having an inclined surface 54 inclined in the assembly direction of the voltage detection terminal 17 (downward in FIG. 5) and a locking surface 55 substantially orthogonal to the side wall 53. Yes. The protrusion 56 is provided so as to press the elastic member 52 when the wire connecting portion 30 is brought close to the support portion 45.

  When the voltage detection terminal 17 is assembled to the case 19 configured as described above, the elastic member 52 rides on the wire connection portion 30 along the inclined surface 54 of the projection portion 56 protruding into the space 51. Thereby, the elastic member 52 is elastically deformed in a direction in which it is folded inward (right side in FIG. 5) with the bent portion as a fulcrum. When the wire connecting portion 30 reaches a normal position in the space 51, for example, a position where the wire connecting portion 30 comes into contact with the support portions 45 a and 45 b, the distal end portion of the elastic member 52 is an inclined surface of the protruding portion 56. It goes over 54 and returns to elasticity. As a result, the distal end portion of the elastic member 52 comes into contact with and engages with the side wall 53 and the engagement surface 55 of the projection 56, so that the voltage detection terminal 17 is engaged with the case 19. It becomes a state.

  Next, a procedure for routing the electric wire 18 to the case 19 will be described. It is assumed that the case 19 accommodates the bus bar 16 and the voltage detection terminal 17. First, the electric wire 18 is disposed on the electric wire connection portion 30 of the voltage detection terminal 17, specifically, directly above the pair of connection pieces 36 a and the pair of connection pieces 36 b. In addition, the distal end side of the electric wire 18 is disposed directly above the guide portion 43 of the wall portion 41. Then, a pressure welding tool (not shown) is lowered to press-fit the electric wires 18 between the pair of connection pieces 36a and the pair of connection pieces 36b. Thereby, each connection piece 36 penetrates the insulation coating of the electric wire 18 and is connected to the core wire (conductor) of the electric wire 18. The electric wires 18 accommodated between the pair of side plates 35 are in close contact with the bottom plate 34 (FIG. 3). After fixing the electric wire 18 by caulking a pair of caulking pieces 37, the proximal end side of the electric wire 18 is bent and accommodated in the electric wire arrangement portion 38, and the electric wire 18 passed through the electric wire arrangement portion 38 is connected to the electric wire. Pull out to the routing path 23 and route it.

  On the other hand, the distal end side of the electric wire 18 that has passed through the electric wire connecting portion 30 is pushed between the pair of holding portions 44. Accordingly, the electric wire 18 is held between the pair of holding portions 44, and the end portion 42 of the electric wire 18 is accommodated in the second accommodation chamber 40 in a non-contact manner.

  As described above, in the present embodiment, a space 51 that penetrates the case 19 in the thickness direction is formed, and a part of the wire connection portion 30 is brought into contact with the support portions 45a and 45b provided so as to cross the space 51. Thus, the area for abutting and supporting the electric wire connecting portion 30 can be reduced. Thereby, it is possible to make it difficult for the liquid to collect on the surface of the wire connection part 30, and even if the liquid accumulates on the surface of the wire connection part 30, the adjacent support parts 45 are provided apart from each other. Therefore, it is possible to prevent the liquid from traveling along the wire connection portion 30 due to the capillary phenomenon. Therefore, it can suppress that a liquid contacts the core wire of the electric wire 18, ie, the core wire of the electric wire 18 connected with the connection piece 36. FIG.

  Moreover, since the opening 46 of the case 19 is formed continuously to the vicinity of the region facing the wire connecting portion 30, the wire connecting portion 30 can be disposed in the space 51. Thereby, since the liquid adhering to the surface of the electric wire connection part 30 can be discharged | emitted from the opening 46, it can suppress more reliably that a liquid contacts the core wire of the electric wire 18. FIG.

  Further, in the present embodiment, the distal end portion of the elastic member 52 extended from the wire connection portion 30 is brought into contact with and engaged with both the engagement surface 55 and the side wall 53 of the projection portion 56. Therefore, for example, as shown in FIG. 5, when the electric wire 18 is press-fitted between the connection pieces 36a and the connection pieces 36b, when the electric wire connection portion 30 is pressed in the direction of the arrow, the electric wire connection portion 30 is slightly Since the elastic member 52 presses the side wall 53 more strongly as a result of this bending, the bending of the wire connecting portion 30 can be suppressed, and the deformation and misalignment of the wire connecting portion 30 can be prevented.

  By the way, the voltage detection terminal 17 has a structure in which the liquid generated due to dew condensation or the like tends to accumulate in these gaps because the bus bar contact portion 29 overlaps the bus bar 16. In this case, when the liquid accumulated in the gap between the bus bar contact portion 29 and the bus bar 16 moves to the wire connection portion 30 through the coupling portions 31a and 31b by capillary action, there is a risk of contact with the core wire of the wire 18.

  FIG. 6 shows a structure in which the bus bar 16 is viewed from the back side of the voltage detection terminal 17. As shown in the figure, the bus bar 16 has notches 57a, 57b at and near the positions facing the connecting portions 31a, 31b when the bus bar contact portion 29 of the voltage detection terminal 17 is overlapped. ing. The notch portion 57a is provided at a position facing the connecting portion 31a, and is formed by cutting a side portion of the bus bar 16 into a rectangular shape. The notch portion 57b is provided at a position facing the connecting portion 31b, and is formed by notching a corner portion of the bus bar 16 in an arc shape. Thus, by forming the notches 57 a and 57 b in the bus bar 16, it is possible to prevent the connecting portions 31 a and 31 b from coming into contact with the bus bar 16. Thereby, since it can suppress that the liquid collected between the bus-bar contact part 29 and the bus-bar 16 moves along each connection part 31 to the electric wire connection part 30, liquid is applied to the core wire of the electric wire 18. Contact can be suppressed.

  As mentioned above, although embodiment of this invention has been explained in full detail with drawing, said embodiment is only an illustration of this invention and this invention is not limited only to the structure of said embodiment. . Needless to say, even if there is a design change within a range not departing from the gist of the present invention, it is included in the present invention.

  For example, in the present embodiment, the example in which the opening 46 is formed in the case 19 in order to provide the space 51 between the electric wire connection portion 30 and the case 19 has been described. However, if the space 51 can be formed, Instead of the opening 46, for example, the case 19 may be provided with a recess. Further, the shape of the opening 46 and the recessed portion is not limited to the example of the present embodiment, and may be formed on at least one surface of the case 19 facing the wire connecting portion 30.

  Moreover, although the example which provides the two support parts 45a and 45b was demonstrated in this embodiment, the number of support parts is not restricted to this, One may be sufficient and three or more may be provided. .

  In the present embodiment, the electric wire 18 is connected to the voltage detection terminal 17 that detects the voltage between the adjacent batteries 13, but the present invention is connected to other electric wires, that is, terminals having other functions. It can also be applied as a waterproof structure for electric wires.

DESCRIPTION OF SYMBOLS 11 Bus bar module 12 Battery assembly 13 Battery 14 Positive electrode 15 Negative electrode 16 Bus bar 17 Voltage detection terminal 18 Electric wire 19 Case 20 1st storage chamber 21 Bottom plate 22 Enclosure wall 29 Bus bar contact part 30 Electric wire connection part 31a, 31b Connection part 36a, 36b Connection piece 45a, 45b Support part 46 Opening 51 Space 52 Elastic member 53 Side wall 56 Projection part 57 Notch part

Claims (5)

A plurality of bus bars that connect adjacent positive electrodes and negative electrodes of a plurality of batteries in which positive electrodes and negative electrodes are alternately arranged and connect these batteries in series, a plurality of terminals that are respectively overlapped with these bus bars, and these terminals A plurality of electric wires connected to each other, a plurality of bus bars, a plurality of terminals, and a resin case that accommodates the plurality of electric wires,
The terminal includes a bus bar contact portion that is overlapped with the bus bar, and a wire connection portion that is electrically connected to a conductor of the wire.
The electric wire connecting portion includes a bottom plate that supports a connecting end portion of the electric wire, and a pair of side walls that are erected from both side edges of the bottom plate, and a first protruding portion and a second protruding portion that are provided on the case. Placed between
The case is a bus bar module in which a support portion that abuts and supports the bottom plate of the wire connection portion is formed, and a space is formed between the case and the wire connection portion except for the support portion.   2. The case according to claim 1, wherein a dent is formed at a position facing the electric wire connecting portion except for the support portion, and the dent is formed continuously to the vicinity of a position facing the electric wire connecting portion. Bus bar module. The terminal has an elastic member protruding from the electric wire connecting portion,
The elastic member is formed so as to be able to come into contact with a side wall that rises across the support portion of the case when the wire connection portion is brought into contact with the support portion.
The case is provided with a protrusion on the side wall that is elastically deformed when the elastic member rides when the wire connection portion is brought close to the support portion, and the protrusion is connected to the case with respect to the case. The bus bar module according to claim 1 or 2, wherein the elastic member is elastically restored and engaged when housed in a normal position. The terminal is formed by connecting the bus bar contact portion and the wire connecting portion via a connecting portion,
The bus bar module according to any one of claims 1 to 3, wherein the bus bar is formed by notching a position facing the connecting portion and its vicinity when the bus bar contact portions of the terminals are overlapped.   2. The case according to claim 1, wherein the case is formed with an opening at a position facing the electric wire connecting portion except for the support portion, and the opening is continuously formed to the vicinity of a position facing the electric wire connecting portion. Bus bar module.

Images