JP6265046B2 - Power supply junction box - Google Patents

Description

  The present invention relates to a junction box of a power supply device in which a resistor is accommodated.

  In the following Patent Document 1, a limiting resistor (resistor) is accommodated in a junction box, and the junction box is installed in an intake duct arranged between a pair of battery modules.

JP 2013-196840 A JP 2008-35581 A

  In Patent Document 1, when a current flows through the limiting resistor, the limiting resistor generates heat and heat is transmitted to the junction box. When the amount of heat transferred from the limiting resistor to the junction box increases, the junction box is likely to be thermally deformed.

  An object of this invention is to suppress the deformation | transformation of the junction box by the heat_generation | fever of resistance.

  The junction box of the power supply device according to the present invention employs the following means in order to achieve the above-described object.

A junction box of a power supply device according to the present invention includes a case having a housing portion in which a resistor is housed, a raised portion is provided on the bottom surface of the housing portion, and the resistor forms a gap between the bottom surface of the housing portion. is placed on the raised portion in a state, in the case, the being void and the case communicating hole for communicating the outside forming the resistance is substantially rectangular parallelepiped shape, resistance, Ru is placed directly on the raised part This is the gist.
Further, the case has a bus bar housing portion in which the bus bar is housed, the bus bar housing portion is partitioned from the housing portion by a partition plate, the raised portion is provided on the upper surface of the partition plate, and the communication hole is formed in the raised portion. It may be located at intervals.
In addition, a relay terminal portion is provided below the partition plate, two connection terminal portions are provided on the lower surface of the resistor with a space therebetween, and the two connection terminal portions are provided on the partition plate. The bus bar may be electrically connected to the relay terminal portion through the two through holes, and the relay terminal portion may be electrically connected to the bus bar for electrically connecting the resistor to the power supply device.

  According to the present invention, the heat generated by the resistance is hardly transmitted to the case, and the heat generated by the resistance can be released from the communication hole to the outside of the case. As a result, the deformation of the junction box due to the heat generated by the resistance can be suppressed.

It is a top view which shows the structural example of the junction box of the power supply device which concerns on embodiment of this invention. It is a front view which shows the structural example of the junction box of the power supply device which concerns on embodiment of this invention. It is a side view which shows the structural example of the junction box of the power supply device which concerns on embodiment of this invention. It is a disassembled perspective view which shows the structural example of the junction box of the power supply device which concerns on embodiment of this invention. It is a figure equivalent to the AA cross section of FIG. 1 which shows the structural example of the junction box of the power supply device which concerns on embodiment of this invention.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention (hereinafter referred to as embodiments) will be described with reference to the drawings.

  1-5 is a figure which shows schematic structure of the junction box of the power supply device which concerns on embodiment of this invention. 1 shows a top view, FIG. 2 shows a front view, FIG. 3 shows a side view, FIG. 4 shows an exploded perspective view, and FIG. 5 shows a view corresponding to the AA cross section of FIG. The upper case 12 includes a resistance accommodating portion 14 in which a limiting resistor (register) 24 is accommodated, and a bus bar accommodating portion 16 in which the bus bars 26a and 26b are accommodated. The resistance accommodating portion 14 and the bus bar accommodating portion 16 are separated from each other. 18 and is attached to the lower case 10 on the bus bar accommodating portion 16 side. 1 and 4 show a state where the limiting resistor 24 is removed from the resistance accommodating portion 14, and FIG. 5 shows a state where the limiting resistor 24 is accommodated in the resistance accommodating portion 14. 4 and 5, the limiting resistor 24 has a substantially rectangular parallelepiped shape, and the left-right direction in FIG. 5 is the longitudinal direction. Connection terminals 24 a and 24 b are provided on the lower surface 24 c of the limiting resistor 24 at intervals in the longitudinal direction.

  As shown in FIG. 5, relay terminal portions 28a and 28b are provided on the lower surface side (the bus bar housing portion 16 side) of the partition plate 18 at intervals in the longitudinal direction (left and right direction in FIG. 5). 26a is electrically connected to the relay terminal portion 28a, and the bus bar 26b is electrically connected to the relay terminal portion 28b. The partition plate 18 is formed with through holes 29a and 29b opposite to the relay terminal portions 28a and 28b, respectively, and the intervals between the through holes 29a and 29b are equal to the connection terminals 24a and 24b of the limiting resistor 24. is there. The limiting resistor 24 is accommodated in the resistance accommodating portion 14 with its lower surface 24c facing the upper surface 18a of the partition plate 18, and the connection terminal 24a is electrically connected to the relay terminal portion 28a through the through hole 29a. The terminal 24b is electrically connected to the relay terminal portion 28b through the through hole 29b. Thus, the limiting resistor 24 is electrically connected between the bus bars 26a and 26b. The bus bar 26a is electrically connected to a power supply (not shown) (for example, a battery), and the bus bar 26b is electrically connected to a relay (not shown). The limiting resistor 24 here serves to limit the current flowing from the power supply device from becoming excessive when the relay is turned on.

  In this embodiment, as shown in FIGS. 1, 4, and 5, a raised rib 34 is provided on the upper surface 18 a of the partition plate 18, which is the bottom surface of the resistance accommodating portion 14, so as to rise toward the limiting resistor 24 (upper side in FIG. 5). The limiting resistor 24 is placed on the raised rib 34 in a state where a gap 35 is formed between the lower surface 24c and the upper surface (the bottom surface of the resistance accommodating portion 14) 18a of the partition plate 18. In the example of FIGS. 1, 4 and 5, four raised ribs 34 are disposed at both ends in the longitudinal direction of the bottom surface 18a, and are further disposed at four corners of the bottom surface 18a. In this example, the limiting resistor 24 contacts the raised ribs 34 at both ends in the longitudinal direction, and further contacts the raised ribs 34 at the four corners. In this embodiment, as shown in FIGS. 3 to 5, the upper case 12 is formed with a communication hole 36 for heat dissipation for communicating the gap 35 and the outside of the case. In the example of FIGS. 3 to 5, two communication holes 36 are arranged at both ends in the longitudinal direction of the resistance accommodating portion 14.

  When a current flows from the power supply device through the limiting resistor 24, the limiting resistor 24 generates heat and heat is transmitted to the upper case 12. When the amount of heat transferred from the limiting resistor 24 to the upper case 12 increases, the upper case 12 is likely to be thermally deformed. On the other hand, in the present embodiment, the limiting resistor 24 is placed on the raised rib 34, and the gap 35 is formed between the limiting resistor 24 and the upper surface 18 a of the partition plate 18, thereby generating the limiting resistor 24. It becomes difficult for heat to be transmitted to the partition plate 18. Therefore, the amount of heat transferred from the limiting resistor 24 to the upper case 12 can be reduced, and thermal deformation of the upper case 12 can be suppressed. As a result, the limiting resistor 24 can be reduced in size. Further, in the limiting resistor 24, the heat generation amount is greater in the central portion than in the both ends in the longitudinal direction, but in this embodiment, the limiting resistor 24 is placed on the raised rib 34 at both ends in the longitudinal direction where the heat generation amount is small. By doing so, the heat generated by the limiting resistor 24 becomes more difficult to be transmitted to the partition plate 18, and the amount of heat transferred from the limiting resistor 24 to the upper case 12 can be further reduced.

  Further, in the present embodiment, the upper case 12 is provided with a heat radiating communication hole 36 that allows the gap 35 between the lower surface 24c of the limiting resistor 24 and the upper surface 18a of the partition plate 18 to communicate with the outside of the case. As shown in a, the heat generated by the limiting resistor 24 can be released from the communication hole 36 to the outside of the case. As a result, it is possible to suppress the heat generated in the limiting resistor 24 from being trapped in the gap 35, so that it is possible to suppress thermal deformation of the upper case 12 and to improve the cooling performance of the limiting resistor 24. .

  As mentioned above, although the form for implementing this invention was demonstrated, this invention is not limited to such embodiment at all, and it can implement with a various form in the range which does not deviate from the summary of this invention. Of course.

  10 Lower case, 12 Upper case, 14 Resistance accommodating part, 16 Bus bar accommodating part, 18 Partition plate, 24 Limiting resistor, 24a, 24b Connection terminal, 26a, 26b Bus bar, 28a, 28b Relay terminal part, 29a, 29b Through hole, 34 Raised rib, 35 gap, 36 communicating hole.

Claims (3)

A power supply junction box,
A case having a housing portion in which a resistor is housed;
A raised portion is provided on the bottom surface of the housing portion, and the resistance is placed on the raised portion in a state of forming a gap between the bottom surface of the housing portion,
The case is formed with a communication hole that allows communication between the gap and the outside of the case .
The resistance has a substantially rectangular parallelepiped shape,
Resistance Ru is placed directly on the raised part, the junction box of the power supply. In the junction box of the power unit according to claim 1,
The case has a bus bar accommodating portion in which the bus bar is accommodated,
The bus bar housing part is partitioned from the housing part by a partition plate,
The raised portion is provided on the upper surface of the partition plate,
The communication hole is a junction box of the power supply device that is located at a distance from the raised portion. In the junction box of the power unit according to claim 2,
A relay terminal is provided on the lower side of the partition plate,
On the lower surface of the resistor, two connection terminal portions are provided with a gap therebetween,
The two connection terminal portions are electrically connected to the relay terminal portion through two through holes provided in the partition plate,
A junction box of the power supply device in which a bus bar for electrically connecting a resistor to the power supply device is electrically connected to the relay terminal portion.

Images