Battery pack

Abstract

To surely prevent a high-voltage wire from coming into contact with other high-voltage parts.SOLUTION: The battery pack includes a battery module, an equipment member disposed on the battery module, and a support member disposed between the battery module and the equipment member and formed of an insulating resin, wherein a conductive bus bar is disposed in the support member, one end of the bus bar passing through the support member toward the battery module is connected to the battery module, a connection terminal is formed at the other end of the bus bar passing through the support member toward the equipment member, and the connection terminal of the bus bar is connected to a connection terminal of the equipment member.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present disclosure relates to a battery pack. [Background technology]

[0002] BACKGROUND ART A battery pack is known in which a high-voltage device is disposed above a battery module, and a high-voltage wire is wired between the battery module and the high-voltage device (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2022-081322 Summary of the Invention [Problem to be solved by the invention]

[0004] However, for example, if a high-voltage wire becomes loose, there is a risk that the high-voltage wire may come into contact with other high-voltage parts. The present disclosure has been made in view of the above problems, and has as its main object to provide a battery pack that can reliably prevent contact between high-voltage wires and other high-voltage parts. [Means for solving the problem]

[0005] In order to achieve the above object, one aspect of the present disclosure is to A battery module; a device member disposed on the battery module; a support member made of insulating resin and disposed between the battery module and the device member; Equipped with A conductive bus bar is disposed within the support member, one end of the bus bar passing through the support member toward the battery module is connected to the battery module; a connection terminal is formed on the other end of the bus bar that passes through the support member toward the equipment member, and the connection terminal of the bus bar is connected to the connection terminal of the equipment member; Battery pack is. In this aspect, The equipment member is fixed on an equipment base, a first protrusion protruding toward the device member is formed on one side of the support member, the connection terminal is provided at the other end of the bus bar that passes through the upper end surface of the first protrusion, a second protrusion protruding toward the device member is formed on the other side of the support member, an upper end surface of the second protrusion abuts against a lower surface of the equipment base and supports the lower surface; A gap may be provided between an upper end surface of the first protrusion and a lower surface of the device base. In this aspect, A plurality of the battery modules are arranged parallel to each other in a battery case, The support member may be disposed between adjacent battery modules along a side surface of the battery module. In this aspect, the battery module is fixed to a battery case via a bracket, The support member is fixed to the bracket, The equipment member may be fixed on an equipment base, and the equipment base may be fixed to the bracket. In this aspect, The support member may be formed of a flame-retardant resin, and the bus bar may be insert-molded with the flame-retardant resin of the support member. [Effects of the Invention]

[0006] According to the present disclosure, it is possible to provide a battery pack that can reliably prevent contact between high-voltage wires and other high-voltage parts. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is an exploded perspective view of a battery pack according to this embodiment. [Figure 2] FIG. 2 is a perspective view of the battery pack according to this embodiment, seen obliquely from above. [Figure 3] FIG. 3 is a cross-sectional view of the battery pack according to this embodiment taken along line AA. [Figure 4] FIG. 4 is a perspective view of the support member according to this embodiment, seen obliquely from above. [Figure 5] FIG. 5 is a view of the battery module seen from above. DETAILED DESCRIPTION OF THE INVENTION

[0008] This embodiment will be described below with reference to the drawings. Fig. 1 is an exploded perspective view of a battery pack according to this embodiment. Fig. 2 is a perspective view of the battery pack according to this embodiment seen from diagonally above. Fig. 3 is a cross-sectional view of the battery pack according to this embodiment taken along line AA. Note that in Fig. 2, some of the components above the device base 10 have been omitted to make the drawing easier to see.

[0009] The battery pack 1 according to this embodiment includes a plurality of battery modules 2, an equipment member 3 arranged on the battery modules 2, and a plurality of support members 4 arranged between the battery modules 2 and the equipment member 3.

[0010] The battery module 2 is formed, for example, by stacking a plurality of film-like battery cells 21 in the depth direction of Fig. 3. The battery cells 21 are formed, for example, by lithium ion batteries, nickel cadmium batteries, nickel metal hydride batteries, or the like.

[0011] The battery pack 1 is mounted on a vehicle (such as an electric vehicle or hybrid vehicle) that has an electric motor such as a motor as a drive source, and is used to supply power to the electric motor. The battery module 2 is housed in a battery case 8. The upper end of the battery case 8 is covered with an upper end cover 9.

[0012] The equipment member 3 has a junction box 31 in which a plurality of wiring routes, a plurality of switches, etc. are formed, and a plurality of ECUs (Electronic Control Units) 32 fixed on the junction box 31. The junction box 31 is fixed on the equipment base 10. The junction box 31 and each ECU 32 are electrically connected by wiring or the like.

[0013] The equipment component 3 is housed in an equipment case 5. The lower edge of the equipment case 5 is fixed to an equipment base 10 with bolts and nuts. The upper side of the equipment case 5 is covered with an equipment cover 6. The upper edge of the equipment case 5 and the edge of the equipment cover 6 are fastened together with fastening members such as bolts and nuts via a gasket 7 or the like.

[0014] 4 is a perspective view of the support member 4 according to this embodiment, seen obliquely from above. As shown in FIGS. 3 and 4, a plurality of conductive bus bars 41 are arranged inside the support member 4.

[0015] Support member 4 is a rod-shaped member and is preferably made of a flame-retardant resin such as PEEK (polyether ether ketone) or PTFE (polytetrafluoroethylene). Bus bar 41 is insert-molded with the flame-retardant resin of support member 4 and is completely covered by it.

[0016] In this way, by covering high-voltage bus bar 41 with support member 4 made of flame-retardant resin, bus bar 41 can be reliably protected electrically and thermally. In other words, high-voltage bus bar 41 can be reliably prevented from coming into contact with other high-voltage parts.

[0017] 5 is a view of the battery module viewed from above. The support members 4 are arranged along the side surfaces of the battery modules 2 and between adjacent battery modules 2. As a result, the support members 4 function as partition members that provide thermal insulation between the battery modules 2.

[0018] The battery module 2 is fastened and fixed to a battery case 8, which is a structural member, via a module bracket 22. The support member 4 is rigidly fixed to the module bracket 22 by mechanical fastening or the like. Furthermore, the device base 10, to which the device member 3 is fixed, is fixed to the module bracket 22.

[0019] In this way, the battery module 2, the equipment base 10 to which the equipment member 3 is fixed, and the support member 4 are assembled to the same reference member, the module bracket 22. This reduces the tolerance between the battery module 2 and the equipment member 3, thereby suppressing input to the terminal fastening portion of the bus bar 41 (the fastening portion between the connection terminal 42 and the connection terminal block 33, described below), preventing loosening.

[0020] 3, the junction box 31 and the battery module 2 are electrically connected via a bus bar 41 inside the support member 4. One end of the bus bar 41 passing through the support member 4 toward the battery module 2 is connected to the battery module 2 via a connection member 45 or the like.

[0021] A connection terminal 42 is formed on the other end of the bus bar 41 that passes through the support member 4 toward the device member 3. In this way, by arranging the bus bar 41 inside the support member 4 and providing the connection terminal 42 at its tip, the functions of the support member 4 and the connection terminal 42 are integrated, and the mounting efficiency can be improved.

[0022] A first protrusion 43 that protrudes toward (upward from) the equipment component 3 is formed on one side of the support member 4. A connection terminal 42 is provided on the other end of a bus bar 41 that passes through the upper end surface of the first protrusion 43. The first protrusion 43 and the connection terminal 42 pass through a relief hole 101 formed in the equipment base 10 and are exposed above the equipment base 10.

[0023] 2 and 4, a connection terminal block 33 is provided on the underside of the junction box 31. The connection terminals 42 of the bus bars 41 are connected to the connection terminal block 33 of the junction box 31. As a result, the junction box 31 and the battery module 2 are electrically connected via the bus bars 41, as described above.

[0024] 3, a second protrusion 44 that protrudes toward the equipment member 3 may be formed on the other side of the support member 4. The upper end surface of the second protrusion 44 abuts against the underside of the equipment base 10 and supports the underside. This allows the load from the equipment base 10 to be reliably supported by the second protrusion 44 of the support member 4, thereby suppressing vibrations occurring in the equipment member 3 on the equipment base 10.

[0025] On the other hand, a gap is provided between the upper end surface of the first protrusion 43 and the lower surface of the equipment base 10. This makes it possible to prevent vibrations from being input to the connection terminals 42 of the busbar 41. In other words, the configuration of the first protrusion 43 and the second protrusion 44 of the support member 4 makes it possible to ensure the vibration-proof structure of the equipment member 3 while suppressing vibrations from being input to the connection terminals 42 of the busbar 41.

[0026] Although several embodiments of the present disclosure have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be embodied in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included within the scope and spirit of the invention, and are also included in the scope of the invention and its equivalents as defined in the claims. [Explanation of symbols]

[0027] REFERENCE SIGNS LIST 1 battery pack, 2 battery module, 3 equipment member, 4 support member, 5 equipment case, 6 equipment cover, 7 gasket, 8 battery case, 9 upper end cover, 10 equipment base, 21 battery cell, 22 module bracket, 31 junction box, 33 connection terminal block, 41 bus bar, 42 connection terminal, 43 first protrusion, 44 second protrusion, 45 connection member, 101 relief hole

Claims

1. A battery module; a device member disposed on the battery module; a support member made of insulating resin and disposed between the battery module and the device member; Equipped with A conductive bus bar is disposed within the support member, one end of the bus bar passing through the support member toward the battery module is connected to the battery module; a connection terminal is formed on the other end of the bus bar that passes through the support member toward the equipment member, and the connection terminal of the bus bar is connected to the connection terminal of the equipment member; Battery pack.

2. 2. The battery pack according to claim 1, The equipment member is fixed on an equipment base, a first protrusion protruding toward the device member is formed on one side of the support member, the connection terminal is provided at the other end of the bus bar that passes through the upper end surface of the first protrusion, a second protruding portion that protrudes toward the equipment member is formed on the other side of the support member, an upper end surface of the second protrusion abuts against a lower surface of the equipment base and supports the lower surface; a gap is provided between an upper end surface of the first protrusion and a lower surface of the device base; Battery pack.

3. 2. The battery pack according to claim 1, A plurality of the battery modules are arranged parallel to each other in a battery case, the support member is disposed between adjacent battery modules along a side surface of the battery module. Battery pack.

4. 2. The battery pack according to claim 1, the battery module is fixed to a battery case via a bracket, The support member is fixed to the bracket, The equipment member is fixed on an equipment base, and the equipment base is fixed to the bracket. Battery pack.

5. 2. The battery pack according to claim 1, the support member is formed of a flame-retardant resin, and the bus bar is insert-molded with the flame-retardant resin of the support member. Battery pack.

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