Fixing structure of power supply switching device

Abstract

To provide a fixing structure of a power supply switching device capable of suppressing short circuit between a high-voltage circuit and a low-voltage circuit.SOLUTION: A fixing structure 1 of a power supply switching device includes a power supply switching device 100, a support member 200, and a fastening member 300. The power supply switching device 100 includes a high-voltage circuit, a low-voltage circuit, and a case 130. The case 130 includes a high-voltage region, a low-voltage region, and a partition wall. A first drain hole is provided in the high-voltage region. A second drain hole is provided in the low voltage region. The support member 200 has a support section 214, a first water discharge channel 211 communicating with the first drain hole, a second water discharge channel 212 communicating with the second drain hole, and a blocking section 216 for blocking the first water discharge channel 211 from the second water discharge channel 212.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates to a fixing structure for a power supply switching device. [Background technology]

[0002] For example, JP 2021-83159 A discloses an electrical connection box including an electromagnetic relay and a housing that accommodates the electromagnetic relay. The housing has a high-voltage area in which a high-voltage circuit is arranged, a low-voltage area in which a low-voltage circuit is arranged, and an intermediate portion that divides the high-voltage area and the low-voltage area. Each of the high-voltage area and the low-voltage area is provided with a drain hole. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-83159 Summary of the Invention [Problem to be solved by the invention]

[0004] In an electrical junction box such as that described in JP 2021-83159 A, if a large amount of water is discharged from each drain hole and a large amount of water accumulates in the drainage channel for draining the water from the electrical junction box, a short circuit may occur between the high-voltage circuit and the low-voltage circuit via the water.

[0005] An object of the present disclosure is to provide a fixing structure for a power supply switching device that can suppress a short circuit between a high-voltage circuit and a low-voltage circuit. [Means for solving the problem]

[0006] According to one aspect of the present disclosure, there is provided a fixing structure for an equipment component, comprising: a power source switching device; a support member for supporting the power source switching device; and a fastening member for fastening the power source switching device to the support member, the power source switching device having a high voltage circuit, a low voltage circuit, and a case for accommodating the high voltage circuit and the low voltage circuit, the case having a high voltage area in which the high voltage circuit is disposed, a low voltage area in which the low voltage circuit is disposed, and a partition wall for separating the high voltage area from the low voltage area, the high voltage area including at least one first A water drain hole is provided, and at least one second water drain hole is provided in the low voltage area, and the support member has a support part that supports the case, a first drainage flow path that communicates with the at least one first water drain hole and is for draining water discharged from the at least one first water drain hole, a second drainage flow path that communicates with the at least one second water drain hole and is for draining water discharged from the at least one second water drain hole, and a blocking part that blocks the first drainage flow path from the second drainage flow path. Effect of the Invention

[0007] According to the present disclosure, it is possible to provide a fixing structure for a power supply switching device that can suppress a short circuit between a high-voltage circuit and a low-voltage circuit. [Brief description of the drawings]

[0008] [Figure 1] FIG. 2 is a perspective view showing a schematic configuration of a fixing structure of a power supply switching device according to an embodiment of the present disclosure. [Diagram 2] FIG. 2 is a perspective view showing a state before the power supply switching device is attached to a support member; [Diagram 3] FIG. 2 is a plan view illustrating a state in which a cover is removed from the power supply switching device. [Figure 4] 4 is a schematic cross-sectional view of a power supply switching device and a support member; FIG. [Diagram 5] FIG. 4 is a diagram illustrating a schematic positional relationship between each drain hole and each drainage flow path. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present disclosure will now be described with reference to the accompanying drawings, in which the same or corresponding components are designated by the same reference numerals.

[0010] Fig. 1 is a perspective view showing a schematic view of a fixing structure of a power supply switching device according to an embodiment of the present disclosure. Fig. 2 is a perspective view showing a schematic view of a state before the power supply switching device is attached to a support member. This fixing structure of a power supply switching device is preferably applied to, for example, a battery pack mounted on a vehicle. When applied to a battery pack, the fixing structure of the power supply switching device is attached to a vehicle frame via a vehicle-mounted bracket (not shown).

[0011] As shown in FIGS. 1 and 2, the fixing structure of a power supply switching device includes a power supply switching device 100, a support member 200, and a fastening member 300. As shown in FIG.

[0012] The power supply switching device 100 has a high voltage circuit 110, a low voltage circuit 120, and a case 130. The power supply switching device 100 includes a fuse 101 and a relay 102. An example of the power supply switching device 100 is a junction block.

[0013] High voltage circuit 110 includes a positive bus bar 110p (see FIG. 3) and a negative bus bar 110n (see FIG. 3).

[0014] The low voltage circuit 120 includes a low voltage bus bar 122 (see FIG. 3).

[0015] Case 130 houses high voltage circuit 110 and low voltage circuit 120. Case 130 has a lower case 130A and a cover 130B attached to lower case 130A.

[0016] As shown in FIG. 3, the lower case 130A has a high voltage area 132, a low voltage area 134, and a partition wall 136.

[0017] The high voltage region 132 is a region in which the high voltage circuit 110 is disposed. The high voltage region 132 has a positive electrode side region 132p in which the positive electrode bus bar 110p is disposed, and a negative electrode side region 132n in which the negative electrode bus bar 110n is disposed.

[0018] 3 and 4, at least one first drain hole h11 is provided in the high voltage region 132. In this embodiment, one first drain hole h11 is provided in each of the positive electrode side region 132p and the negative electrode side region 132n. Note that the number of first drain holes h11 provided in each of the regions 132p and 132n is not limited to one.

[0019] The low voltage region 134 is a region in which the low voltage circuit 120 is disposed. In this embodiment, as shown in Fig. 3, the low voltage region 134 is formed between the positive electrode side region 132p and the negative electrode side region 132n.

[0020] 3, at least one second drainage hole h12 is provided in the low voltage region 134. In this embodiment, one second drainage hole h12 is provided in the low voltage region 134. Note that the number of second drainage holes h12 provided in the low voltage region 134 is not limited to one.

[0021] The partition wall 136 separates the high voltage region 132 from the low voltage region 134. The partition wall 136 separates the positive electrode side region 132p from the negative electrode side region 132n. Specifically, the partition wall 136 has a positive electrode side partition portion 136p that separates the positive electrode side region 132p from the low voltage region 134, and a negative electrode side partition portion 136n that separates the negative electrode side region 132n from the low voltage region 134.

[0022] The support member 200 supports the power supply switching device 100. As shown in FIG.

[0023] The bottom wall 210 is located below the power supply switching device 100. The peripheral wall 220 stands up from the peripheral edge of the bottom wall 210. The peripheral wall 220 is formed around the periphery of the power supply switching device 100. The bottom wall 210 and the peripheral wall 220 are formed by processing a metal plate or the like.

[0024] 2 and 5, the bottom wall 210 has a first drainage flow path 211, a second drainage flow path 212, a third drainage flow path 213, a support portion 214, and a blocking portion 216. Note that in Fig. 5, the first drainage flow path 211, the second drainage flow path 212, and the third drainage flow path 213 are shaded.

[0025] The support portion 214 supports the case 130. The support portion 214 may be formed flat. A fastening member 300 is attached to the support portion 214.

[0026] The first drainage flow path 211 communicates with the first drainage hole h11. The first drainage flow path 211 is a flow path for discharging the water discharged from the first drainage hole h11. As shown in FIG. 4, a gap is formed between the first drainage hole h11 and the first drainage flow path 211. The first drainage flow path 211 is formed at a position lower than the support portion 214. As shown in FIGS. 2, 4, and 5, the first drainage flow path 211 is provided with a first drainage hole h21. Therefore, the water that flows from the first drainage hole h11 into the first drainage flow path 211 is discharged through the first drainage hole h21.

[0027] The second drainage flow path 212 communicates with the second drainage hole h12. The second drainage flow path 212 is a flow path for discharging water discharged from the second drainage hole h12. As shown in FIG. 5, the second drainage hole h12 is provided at a position where the water discharged from the second drainage hole h12 flows into the second drainage flow path 212. As shown in FIG. 2 and FIG. 5, the second drainage flow path 212 is provided with a second drainage hole h22. Therefore, the water that flows into the second drainage flow path 212 from the second drainage hole h12 is discharged through the second drainage hole h22.

[0028] The third drainage flow path 213 does not communicate with the first drainage hole h11 and the second drainage hole h12. The third drainage flow path 213 is a flow path for draining water that has entered from the outside of the power supply switching device 100. As shown in Figs. 1, 2, and 5, the third drainage flow path 213 is provided with a third drainage hole h23. Therefore, water that has flowed into the third drainage flow path 213 is discharged through the third drainage hole h23.

[0029] The blocking portion 216 blocks the first drainage flow path 211 from the second drainage flow path 212. In this embodiment, the blocking portion 216 also blocks the second drainage flow path 212 from the third drainage flow path 213. The blocking portion 216 has a shape that protrudes from each of the drainage flow paths 211, 212, and 213. In this embodiment, the blocking portion 216 is configured by a bead formed on the bottom wall 210. That is, the blocking portion 216 has a function of increasing the rigidity of the bottom wall 210 and a function of blocking each of the drainage flow paths 211, 212, and 213 from each other.

[0030] As shown in FIG. 5, the second drainage hole h12 is formed above the blocking portion 216, but the blocking portion 216 is inclined so as to guide the water drained from the second drainage hole h12 to the second drainage flow path 212.

[0031] As described above, in the fixed structure of the power supply switching device in this embodiment, the first drainage flow path 211 through which water discharged from the first drainage hole h11 provided in the high voltage area 132 flows is blocked by the blocking section 216 from the second drainage flow path 212 for draining water discharged from the second drainage hole h12 provided in the low voltage area 134, thereby preventing a short circuit between the high voltage circuit 110 and the low voltage circuit 120 through water accumulated in each drainage flow path 211, 212.

[0032] It will be appreciated by those skilled in the art that the exemplary embodiments described above are examples of the following aspects.

[0033] The fixing structure of the power supply switching device in the above embodiment includes a power supply switching device, a support member that supports the power supply switching device, and a fastening member that fastens the power supply switching device to the support member, the power supply switching device having a high voltage circuit, a low voltage circuit, and a case that houses the high voltage circuit and the low voltage circuit, the case having a high voltage area in which the high voltage circuit is arranged, a low voltage area in which the low voltage circuit is arranged, and a partition wall that separates the high voltage area from the low voltage area, and the high voltage area includes at least one first A water drain hole is provided, and at least one second water drain hole is provided in the low voltage area, and the support member has a support part that supports the case, a first drainage flow path that communicates with the at least one first water drain hole and is for draining water discharged from the at least one first water drain hole, a second drainage flow path that communicates with the at least one second water drain hole and is for draining water discharged from the at least one second water drain hole, and a blocking part that blocks the first drainage flow path from the second drainage flow path.

[0034] In the fixing structure of this power supply switching device, the first drainage flow path through which water drained from the first drain hole provided in the high-voltage area flows is blocked by a blocking section from the second drainage flow path for draining water discharged from the second drainage hole provided in the low-voltage area, thereby preventing a short circuit between the high-voltage circuit and the low-voltage circuit through water accumulated in each drainage flow path.

[0035] It is also preferable that a gap is formed between the at least one first drain hole and the first drainage flow path, and it is preferable that a gap is formed between the at least one second drain hole and the second drainage flow path.

[0036] In this way, short circuits between the high voltage circuit and the low voltage circuit are more reliably prevented.

[0037] The high voltage circuit includes a positive bus bar and a negative bus bar, the high voltage region includes a positive electrode side region in which the positive electrode bus bar is arranged and a negative electrode side region in which the negative electrode bus bar is arranged, and the partition wall separates the positive electrode side region from the negative electrode side region. The at least one first water drain hole may include a plurality of first water drain holes. In this case, at least one first water drain hole of the plurality of first water drain holes may be provided in the positive electrode side region, and at least one first water drain hole of the plurality of first water drain holes may be provided in the negative electrode side region. The first water drain hole provided in the positive electrode side region and the first water drain hole provided in the negative electrode side region may be connected to the first drainage flow path.

[0038] The partition wall preferably has a positive electrode side partition portion that separates the positive electrode side area from the low voltage area, and a negative electrode side partition portion that separates the negative electrode side area from the low voltage area.

[0039] It should be noted that the embodiments disclosed herein are illustrative in all respects and should not be considered as limiting. The scope of the present invention is indicated by the claims, not by the description of the above embodiments, and further includes all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0040] 1 Fixing structure of power supply switching device, 100 Power supply switching device, 110 High voltage circuit, 110p Positive bus bar, 110n Negative bus bar, 120 Low voltage circuit, 122 Low voltage bus bar, 130 Case, 130A Lower case, 130B Cover, 132 High voltage area, 132p Positive side area, 132n Negative side area, 134 Low voltage area, 136 Partition wall, 136p Positive side partition part, 136n Negative side partition part, 200 Support member, 210 Bottom wall, 211 First drainage flow path, 212 Second drainage flow path, 213 Third drainage flow path, 214 Support part, 216 Cut-off part, 220 Peripheral wall, h11 First water drain hole, h12 Second water drain hole, h21 First drain hole, h22 Second drain hole, h23 Third drainage hole.

Claims

1. A power supply switching device; A support member for supporting the power supply switching device; a fastening member for fastening the power supply switching device to the support member, The power supply switching device is A high voltage circuit; A low voltage circuit; a case that houses the high voltage circuit and the low voltage circuit, The case is a high voltage area in which the high voltage circuit is disposed; a low voltage area in which the low voltage circuit is disposed; a partition wall that separates the high voltage area from the low voltage area, The high voltage area is provided with at least one first drain hole, The low voltage area is provided with at least one second drain hole, The support member is A support portion that supports the case; a first drainage passage communicating with the at least one first drainage hole for discharging water discharged from the at least one first drainage hole; a second drainage passage communicating with the at least one second drainage hole for discharging water discharged from the at least one second drainage hole; a blocking portion that blocks the first drainage flow path from the second drainage flow path.

2. A gap is formed between the at least one first drain hole and the first drainage flow path, The fixing structure of the power supply switching device according to claim 1 , wherein a gap is formed between the at least one second drain hole and the second drainage flow path.

3. The high voltage circuit includes: A positive bus bar; a negative bus bar; The high voltage region is A positive electrode side region in which the positive electrode bus bar is arranged; a negative electrode side region in which the negative electrode bus bar is disposed, The partition wall separates the positive electrode side region from the negative electrode side region, The at least one first drain hole includes a plurality of first drain holes, At least one first drain hole among the plurality of first drain holes is provided in the positive electrode side region, At least one first drain hole among the plurality of first drain holes is provided in the negative electrode region, 3. The fixing structure of the power supply switching device according to claim 1, wherein the first drainage hole provided in the positive electrode side region and the first drainage hole provided in the negative electrode side region are connected to the first drainage flow path.

4. The partition wall is a positive electrode side partition portion that separates the positive electrode side region and the low voltage region; The fixing structure of the power supply switching device according to claim 3 , further comprising: a negative electrode side partition portion that separates the negative electrode side area and the low voltage area.

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