JP2015080332A - Current limiting relay device and power supply device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a current limiting relay device and a power supply device capable of suppressing a rise in temperature by efficiently transferring heat generated when power is supplied to a relay to a resistance, and preventing the failure of the relay when power is supplied.SOLUTION: A current limiting relay device 61 for blocking currents, and for supplying limited currents includes: a first terminal 321; a second terminal 323; and a current limiting contact part 32 for allowing limited currents to flow between the first terminal 321 and the second terminal 323. Also, the current limiting relay device 61 includes: a current limiting relay part 34 having the current limiting contact part 32; a first resistance 6a disposed at one end side of the current limiting contact part 32; and a second resistance 6b disposed at the other end side of the current limiting contact part 32. Furthermore, the current limiting relay device 61 includes: a first wiring part 322 disposed between the first terminal 321 and the first resistance 6a; and a second wiring part 324 disposed between the second terminal 323 and the second resistance 6b.

Description

  The present invention relates to a current limiting relay device and a power supply device including a resistor and a relay that cuts off and energizes current flowing through the resistor. In particular, the present invention relates to a current limiting relay device that can efficiently dissipate heat generated by a relay that can be used in a hybrid vehicle or an electric vehicle, and a power supply device that uses the current limiting relay device.

  Conventionally, a junction box that constitutes a power supply device that can be used in a hybrid vehicle or an electric vehicle described in Patent Document 1 is known. A current limiting relay device is provided in the junction box.

  And this patent document 1 is a simple structure, can achieve cost reduction and size reduction, and provides the junction box excellent in the assembly | attachment property.

  The junction box of Patent Document 1 is connected to the positive electrode side and the negative electrode side of the battery as a power source, and the first contact part and the third contact part through which the main current reaching the capacitor flows, and the precharge current connected to the negative electrode side of the battery. A second contact portion that flows.

  The second contact portion is connected in series with a single resistor to form a series body. The series body and the third contact portion are connected in parallel. Initially, a precharge current flows through the capacitor through the series body, and then a main current flows through the first contact portion and the third contact portion.

JP 2009-189221 A

  According to the technique of the above-mentioned Patent Document 1, heat generated at the contact portion when the relay is energized is conducted to the resistance through the path connected by the energization member, but the temperature inside the relay rises, If the temperature exceeds the heat resistance, the relay may break down. In order to prevent this, the relay may be made large, but it is expensive and takes up space.

  In view of the above problems, the present invention efficiently conducts heat generated when a relay is energized to a resistor, suppresses a temperature rise of the relay, and prevents a relay failure during energization and a power supply device. The purpose is to provide.

  Descriptions of patent documents listed as prior art can be introduced or incorporated by reference as explanations of technical elements described in this specification.

  In order to achieve the above object, the present invention employs the following technical means. That is, in one aspect of the present invention, the current limiting relay device (61) that cuts off the current and energizes the limited current is provided. The current limiting relay device (61) has a first terminal (321) and a second terminal (323), and is limited between the first terminal (321) and the second terminal (323). It has a current limiting contact (32) through which a current flows.

  The current limiting relay device (61) includes a current limiting relay unit (34), a first resistor (6a) connected to a first terminal on one end side of the current limiting contact unit (32), a current And a second resistor (6b) connected to the second terminal on the other end side of the limiting contact (32). The current limiting relay section (34) has a current limiting contact section (32).

  Furthermore, the current limiting relay device (61) includes a first wiring portion (322) provided between the first terminal (321) and the first resistor (6a). Similarly, it has the 2nd wiring part (324) provided between the 2nd terminal (323) and the 2nd resistance (6b).

  The heat generated at the current limiting contact portion (32) passes through the first wiring portion (322) and the second wiring portion (324) and is dissipated by the first resistor (6a) and the second resistor (6b). .

  According to the present invention, the resistance is separated into the first resistor disposed on one side of the current limiting contact portion and the second resistor disposed on the other side of the current limiting contact portion. Accordingly, the heat generated at the current limiting contact portion passes through the first wiring portion and the second wiring portion and is dissipated by the first resistor and the second resistor. Therefore, the heat of the current limiting contact portion is efficiently radiated, and the current limiting relay portion having the current limiting contact portion can be reduced in size.

  Next, in one aspect of the present invention, the power supply device includes a power source (2), a load device (5) to which power is supplied from the power source (2), and between the power source (2) and the load device (5). And a main contact portion (31 or 41) through which a main current from the power source (2) flows.

  A first resistor (6a), a current limiting contact (32), and a second resistor (6b) are connected in parallel to the main contact (31 or 41).

  According to the present invention, the main current for supplying power from the power source to the load device flows through the main contact portion. A first resistor, a current limiting contact portion, and a second resistor are connected in parallel to the main contact portion. Therefore, the limited current can flow from the power source to the load device via the first resistor, the current limiting contact portion, and the second resistor. In that case, the heat of the current limiting contact portion is radiated through the first resistor and the second resistor, and the current limiting relay portion having the current limiting contact portion can be downsized or the rated current can be increased. .

  Next, in one aspect of the present invention, the main contact portion (31 or 41) and the current limiting contact portion (32) are configured in the same integrated relay.

  According to the present invention, the main current flowing from the power source to the load device is controlled, and the main contact portion having a long heat generation time and a large heat generation amount and the current limiting contact portion constitute the same integrated relay. Therefore, the heat inside the integrated relay generated from both the main contact portion and the current limiting contact portion is efficiently dissipated, and it is possible to reduce the size of the integrated relay or increase the rated current.

  In addition, the code | symbol in parentheses as described in a claim and said each means thru | or description is an example which shows the correspondence with the specific means as described in embodiment mentioned later easily, and limits the content of invention is not.

It is an electric circuit diagram of the electric power supply apparatus using the relay apparatus for electric current limitation which shows 1st Embodiment of this invention. It is a partial structure perspective view of the electric power supply apparatus which uses the current limiting relay apparatus in the said embodiment. It is a partial structure perspective view of the electric power supply apparatus which uses the relay apparatus for electric current limitation which shows 2nd Embodiment of this invention. It is an electric circuit diagram of the electric power supply apparatus using the relay apparatus for electric current limitation which shows 3rd Embodiment of this invention. It is an electric circuit diagram of the electric power supply apparatus using the relay apparatus for electric current limitation which shows 4th Embodiment of this invention. It is a perspective view of the 1st resistance used for other embodiments of the present invention.

  A plurality of modes for carrying out the present invention will be described below with reference to the drawings. In each embodiment, parts corresponding to the matters described in the preceding embodiment may be denoted by the same reference numerals, and redundant description may be omitted. In the case where a part of the configuration is described in each form, the other forms described above can be applied to the other parts of the configuration.

  Not only combinations of parts that clearly indicate that the combination is possible in each embodiment, but also the embodiments are partially combined even if they are not clearly specified unless there is a problem with the combination. It is also possible.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described in detail with reference to FIGS. 1 and 2. FIG. 1 shows a power supply device using a current limiting relay device according to a first embodiment of the present invention. FIG. 2 shows a partial configuration of the power supply device 1 using the current limiting relay device according to the first embodiment.

  As shown in FIG. 1, the power supply device 1 includes a first main contact portion 31 connected to a positive side that is one side of a power source 2 configured by a battery, and a negative side that is the other side of the power source 2. It has a current limiting contact portion 32 to be connected and a second main contact portion 41. The current limiting contact 32, the first resistor 6a, and the second resistor 6b are connected in series to form a current limiting relay device 61 that is configured in a series. The second main contact portion 41 is connected in parallel with the current limiting relay device 61.

  The first main contact portion 31, the current limiting contact portion 32, and the second main contact portion 41 have individual contact driving coils, and are separate relays, that is, the first main relay. 3, a current limiting relay unit 34, and a second main relay 4.

  The power supply device 1 includes a terminal 312 disposed on the opposite side of the first main contact portion 31 to the side connected to the power source 2, and a side connected to the power source 2 in the second main contact portion 41. And a terminal 412 arranged on the opposite side. A capacitor 50 is connected between the terminal 312 and the terminal 412.

  The power supply device 1 of the first embodiment constitutes a junction box. This junction box can be used for, for example, a motor drive device (not shown) in a hybrid vehicle, an electric vehicle, or the like.

  The control device 7 of the power supply device 1 constituting the junction box is individually provided in coils (not shown) provided in the first main contact portion 31, the current limiting contact portion 32, and the second main contact portion 41, respectively. To supply / stop the control current. On / off of each contact portion is controlled by supplying / stopping the control current.

  Further, the load device 5 is connected to the capacitor 50 in parallel. Load device 5 includes an inverter that converts a DC voltage supplied from capacitor 50 into an AC voltage, and a motor that is operated by the AC voltage supplied from the inverter.

  Next, operation | movement of the electric power supply apparatus 1 is demonstrated using FIG. First, control currents 71 and 72 are supplied from the control device 7 to a coil (not shown) that drives the first main contact 31 and a coil (not shown) that drives the current limiting contact 32. As a result, the first main contact portion 31 and the current limiting contact portion 32 are simultaneously turned on.

  When simultaneously turned on in this way, one closed circuit is formed between the power source 2, the first main contact portion 31, the capacitor 50, and the current limiting relay device 61 constituted by a series body. As a result, a DC voltage is supplied to the capacitor 50, and the capacitor 50 is gradually precharged.

  At this time, since the second main contact portion 41 is not turned on, the current flows through the current limiting relay device 61. Therefore, an inrush current does not flow through the load device 5 due to a voltage drop in the first resistor 6a and the second resistor 6b of the current limiting relay device 61. This state is continued until the electric charge is saturated in the capacitor 50.

  Next, when the precharge of the capacitor 50 is completed, the coil (not shown) of the second main contact portion 41 is kept on with the first main contact portion 31 and the current limiting contact portion 32 turned on. The second main contact portion 41 is turned on by supplying a current 73 from the control device 7. At this time, a smoothed and stable DC voltage is supplied from the precharged capacitor 50 to the inverter in the load device 5.

  In the inverter 501 in the load device 5, the DC voltage supplied from the capacitor 50 is converted into an AC voltage, and the motor 502 is operated using this AC voltage. Further, the inverter 501 converts the alternating current generated by the motor 502 into a direct current. This direct current does not flow through the current limiting relay device 61 but passes through the second main contact portion 41 and is supplied to the power source 2.

  The power supply 2 includes a battery, and the load device 5 includes an inverter 501 and a motor 502 driven by the inverter 501. A capacitor 50 is provided in parallel with the load device 5, and the current limiting relay device 61 is supplied with a second main contact portion 41 connected in parallel with the current limiting relay device 61 after supplying a precharge current to the capacitor 50. Is done. Therefore, the power supply device 1 constitutes a junction box of a vehicle that is driven by the motor 502.

  Heat generated inside the current limiting relay unit 34 passes through the first wiring unit 322 and the second wiring unit 324 and is dissipated by the first resistor 6a and the second resistor 6b. The 1st wiring part 322 is comprised from the bus-bar or metal plate which wires between the 1st terminal 321 and the electric terminal which is not shown in figure of the 1st resistance 6a. In this embodiment, a metal plate is used and shared with the bracket.

  The 2nd wiring part 324 is comprised from the bus bar or metal plate which wires between the 2nd terminal 323 and the 2nd resistance 6b. In this embodiment, a metal plate is used and shared with the bracket.

  As shown in FIG. 2, the first resistor 6 a and the second resistor 6 b are integrally fixed to both sides of the current limiting relay unit 34. That is, the first resistor 6 a and the second resistor 6 b are arranged on both sides of the current limiting relay unit 34. The current limiting relay unit 34 in which the ear-shaped first resistor 6 a and the second resistor 6 b are fixed integrally is a second main contact unit 41 in the second main relay 4. The main relay 4 is connected in parallel. This parallel connection is performed via the third wiring portion 325 and the fourth wiring portion 326. Note that FIG. 2 illustrates some of the wiring and devices in FIG. 1 and omits others.

  In FIG. 1, heat generated at the current limiting contact portion 32 of the current limiting relay unit 34 at the initial energization is transmitted to the first resistor 6 a and the second resistor 6 b through the first wiring portion 322 and the second wiring portion 324, respectively. By heating, the temperature rise of the current limiting contact portion 32 is suppressed.

  The first resistor 6a and the second resistor 6b are composed of parts having the same rating, and are fixed symmetrically protruding in an ear shape on both sides of the current limiting relay unit 34. In the first resistor 6a and the second resistor 6b, a bracket (not shown) for attaching these resistors is shared as a bus bar or a metal plate. The bracket is fastened to both sides of the first terminal 321 and the second terminal 323 of the current limiting relay unit 34, whereby the first resistor 6a and the second resistor 6b are assembled.

  The first resistor 6a and the second resistor 6b are cement resistors, in which a resistance unit of a winding type or a metal oxide film is put in a ceramic case, and the resistor unit is sealed in the case with cement. Yes. In addition to cement resistance, other types of resistance such as enamel resistance may be used. An example of a resistance rating is 30 W, 400 volts.

(Operational effects of the first embodiment)
In the first embodiment, a current limiting relay device 61 that cuts off a current and energizes a limited current has a first terminal 321 and a second terminal 323, and the first terminal 321 and the second terminal 323. A current limiting contact portion 32 through which a limited current flows.

  The current limiting relay device 61 includes a current limiting relay unit 34, a first resistor 6 a connected to the first terminal 321 on one end side of the current limiting contact unit 32, and the current limiting contact unit 32. And a second resistor 6b connected to the second terminal 323 on the end side. The current limiting relay section 34 has a current limiting contact section 32.

  Furthermore, the current limiting relay device 61 includes a first wiring portion 322 connected between the first terminal 321 and the first resistor 6a. Similarly, it has the 2nd wiring part 324 connected between the 2nd terminal 323 and the 2nd resistance 6b.

  Then, the heat generated in the current limiting contact portion 32 passes through the first wiring portion 322 and the second wiring portion 324 and is dissipated by the first resistor 6a and the second resistor 6b.

  According to this, the resistance is separated into the first resistor 6 a disposed on one side of the current limiting contact portion 32 and the second resistor 6 b disposed on the other side of the current limiting contact portion 32. Yes. Accordingly, the heat generated by the current limiting contact portion 32 passes through the first wiring portion 322 and the second wiring portion 324 and is dissipated by the first resistor 6a and the second resistor 6b. Therefore, the heat of the current limiting contact portion 32 is efficiently radiated, and the current limiting relay portion 34 having the current limiting contact portion 32 can be reduced in size.

  Further, the first wiring part 322 is configured by a bus bar or a metal plate for wiring between the first terminal 321 and the first resistor 6a. According to this, heat is transmitted to the first resistor 6a while the heat of the current limiting contact portion 32 is dissipated by the bus bar or the metal plate wired between the first terminal 321 and the first resistor 6a. Therefore, the heat of the current limiting contact portion 32 is efficiently radiated, and the current limiting relay portion 34 having the current limiting contact portion 32 can be reduced in size. The second resistor 6b side also has a similar heat dissipation action, which contributes to downsizing of the current limiting relay unit 34.

  Furthermore, a first resistor 6 a and a second resistor 6 b are attached to the current limiting relay unit 34. Therefore, the distance between the current limiting relay unit 34 and the first resistor 6a or the second resistor 6b can be shortened. Therefore, the heat inside the current limiting relay unit 34 can be efficiently transmitted to the first resistor 6a and the second resistor 6b, and the current limiting relay unit 34 can be reduced in size.

  In addition, the first resistor 6a and the second resistor 6b are composed of parts having the same rating, and are symmetrically fixed to both sides of the current limiting relay unit 34 and attached in an ear shape. Accordingly, the first resistor 6a and the second resistor 6b can be attached to both sides of the current limiting relay unit 34 in a well-balanced manner, and the current limiting relay unit 34, the first resistor 6a, and the second resistor 6b are connected. Easy to handle as one part.

  Next, in the first embodiment, the power supply device 1 using the current limiting relay device 61 includes a power source 2 and a load device 5 to which power is supplied from the power source 2. A first main contact portion 31 and a second main contact portion 41 through which a main current from the power source 2 flows are provided between the power source 2 and the load device 5. The first main contact portion 31 and the second main contact portion 41 are also simply referred to as main contact portions 31 and 41.

  The first resistor 6a, the current limiting contact portion 32, and the second resistor 6b are connected in parallel to one second main contact portion 41.

  According to this, the main current when the power of the power source 2 is supplied to the load device 5 flows through the second main contact portion 41. The first resistor 6a, the current limiting contact portion 32, and the second resistor 6b are connected in parallel to the second main contact portion 41. Therefore, the limited current can flow from the power source 2 to the load device 5 via the first resistor 6a, the current limiting contact portion 32, and the second resistor 6b. In this case, the heat of the current limiting contact portion 32 is dissipated through the first resistor 6a and the second resistor 6b, and the current limiting relay portion 34 having the current limiting contact portion 32 is reduced in size or rated current. An increase in can be achieved.

  The power source 2 includes a battery. The load device 5 includes an inverter 501 and a motor 502 driven by the inverter 501, and a capacitor 50 is provided in parallel with the load device 5. In the current limiting relay device 61, the first main contact portion 31 or the second main contact portion 41 in parallel with the current limiting relay device 61 is turned on after a precharge current is passed through the capacitor 50. The first main contact portion 31 or the second main contact portion 41 is also simply referred to as the main contact portion 31 or 41.

  The power supply device 1 constitutes a junction box of a vehicle that travels by the motor 502. According to this, it is suitable for a junction box that requires miniaturization as much as possible from the viewpoint of mounting space.

(Second Embodiment)
Next, a second embodiment of the present invention will be described. In the following embodiments, the same components as those in the first embodiment described above are denoted by the same reference numerals, description thereof is omitted, and different configurations will be described. In addition, about 2nd Embodiment or less, the same code | symbol as 1st Embodiment shows the same structure, Comprising: The description which precedes is used.

  FIG. 3 shows a partial configuration of a power supply device using the current limiting relay device according to the second embodiment of the present invention. Also in FIG. 3, as in the first embodiment of FIG. 1, the current in the first resistor 6 a and the current limiting relay unit 34 is arranged in parallel on both sides of the second main contact 41 of the second main relay 4. A series body of the limiting contact 32 and the second resistor 6b is connected.

  As shown in FIG. 1, the first resistor 6 a and the second resistor 6 a are connected to both sides of the second main contact portion 41 of the second main relay 4 by the first wiring portion 322 and the second wiring portion 324 made of electric wires. The resistor 6b is connected. In addition, the first resistor 6a and the second main relay 4 and the second resistor 6b and the second main relay 4 are also connected by a third wiring portion 325 and a fourth wiring portion 326 that are made of electric wires. . The first resistor 6a and the second resistor 6b are screwed to a base (not shown) with a bracket.

(Third embodiment)
Next, a third embodiment of the present invention will be described. A different part from above-described embodiment is demonstrated. These show the electric power supply apparatus which uses the relay apparatus for electric current limitation which shows 3rd Embodiment of this invention. In FIG. 4, the first main contact portion 31 and the current limiting contact portion 32 are a first system that is an integrated relay that simultaneously controls on / off of the first main contact portion 31 and the current limiting contact portion 32. A main relay 334 is configured. The second main contact part 41 constitutes a second main relay 4 provided separately from the first system main relay 334.

  In the present example, the first main contact portion 31 and the current limiting contact portion 32 are a single component as the first system main relay 334. For this purpose, the first main contact portion 31 and the current limiting contact portion 32 share a contact driving coil provided for controlling on / off. Therefore, the first system main relay 334 is formed by integrating the first main contact portion 31 and the current limiting contact portion 32, and simultaneously connects the first main contact portion 31 and the current limiting contact portion 32. One part configured to be on-controlled. That is, the first main contact portion 31 and the current limiting contact portion 32 are configured in an integrated relay configured by the first system main relay 334. Control currents 71 and 72 are supplied from the control device 7 to the first system main relay 334.

  According to this example, similarly to the first embodiment, a power supply device 1 that has a simple configuration, can be reduced in cost and size, and forms a junction box excellent in assembling property is obtained. However, the following points can be cited as effects specific to this example.

(Operational effect of the third embodiment)
In the third embodiment, the first main contact portion 31 and the current limiting contact portion 32 are configured in the same integrated relay. This integrated relay is the first system main relay 334. According to this, the main current flowing from the power source 2 to the load device 5 is controlled, and the first main contact portion 31 and the current limiting contact portion 32 having a long heat generation time and a large heat generation amount constitute an integrated relay. It will be.

  Therefore, the heat inside the integrated relay generated from both the first main contact portion 31 and the current limiting contact portion 32 is efficiently radiated to the first resistor 6a and the second resistor 6b, and the size of the integrated relay is reduced. Or increase in rated current can be achieved. Also, the coil for driving the contact of the integrated relay can be shared.

(Fourth embodiment)
Next, a fourth embodiment of the present invention will be described. A different part from above-described embodiment is demonstrated. FIG. 5 shows a power supply device using the current limiting relay device according to the fourth embodiment of the present invention. In FIG. 5, the second main contact portion 41 and the current limiting contact portion 32 are a second relay component that simultaneously controls on / off of the second main contact portion 41 and the current limiting contact portion 32. A system main relay 434 is configured. In addition, the first main contact portion 31 constitutes the first main relay 3 provided separately from the second system main relay 434.

  In this example, the second main contact portion 41 and the current limiting contact portion 32 are used as one component as the second system main relay 434. The contact driving coils provided for controlling on / off can be provided separately for the second main contact part 41 and the current limiting contact part 32, and the on / off timing can be made different.

  According to this example, similarly to the first embodiment, a power supply device 1 that has a simple configuration, can be reduced in cost and size, and forms a junction box excellent in assembling property is obtained. However, the following points can be cited as effects specific to this example.

(Operational effect of the fourth embodiment)
In the fourth embodiment, the second main contact portion 41 and the current limiting contact portion 32 are configured in the same integrated relay. That is, the main current flowing from the power source 2 to the load device 5 is controlled, and the first main contact portion 31 and the current limiting contact portion 32 having a long heat generation time and a large heat generation amount are configured in the same integrated relay.

  Therefore, the heat in the integrated relay generated from both the second main contact portion 41 and the current limiting contact portion 32 is efficiently radiated, and the integrated relay can be reduced in size or rated current can be increased.

(Other embodiments)
In the above embodiment, the preferred embodiment of the present invention has been described. However, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the gist of the present invention. It is. The structure of the said embodiment is an illustration to the last, Comprising: The scope of the present invention is not limited to the range of these description. The scope of the present invention is indicated by the description of the scope of claims, and further includes meanings equivalent to the description of the scope of claims and all modifications within the scope.

  When the power source is an alternating current, the resistance in the present invention includes an alternating current resistance (reactance). Therefore, a reactor may be used as the first resistor or the second resistor. The relay also includes an electromagnetic switch.

  In the first embodiment, the first wiring part 322 and the second wiring part 324 use bus bars or metal plates, but may be electrically connected by a wire harness constituted by a flat electric wire or the like.

  Each of the first resistor and the second resistor may be formed as a single member by integrating the electrical terminal of the resistor and the bracket for attaching the resistor with the same metal material. An example is shown in FIG. FIG. 6 shows a configuration of the first resistor 6a used as another embodiment. The configuration of FIG. 6 can be used in the first to fourth embodiments.

  In FIG. 6, the resistance body 65 of the first resistor 6a forming the cement resistance is placed in a ceramic case 66 as a resistance unit of a winding type or a metal oxide film. The resistance unit is sealed in the case 66 with cement 67. On both the left and right sides of the case 66, electrode portions constituting electrical terminals 68 surrounding the case 66 are provided. And it has the bracket 69 which protruded on the left and right of the case 66 in the shape of a tongue.

  The electric terminal 68 and the bracket 69 are formed of a continuous and integral metal plate to form a single member. As a result, the electric terminal 68 also serves as the bracket 69. The second resistor 6b has the same configuration as the first resistor 6a in FIG.

  According to this, the electric terminal 68 and the bracket 69 are continuously integrated with the same metal material. Therefore, since the heat from the outside transmitted from the bracket 69 side and the heat generated in the resistance main body 65 are dissipated in the battery pack case (not shown) even through the bracket 69, the bracket 69 can be used as a heat dissipation fin. . A blower is provided in the battery pack case, and air for cooling the first resistor 6a, the second resistor 6b, and the like circulates.

  Moreover, the 1st resistance and the 2nd resistance should just be on the both sides of the integrated relay containing a current limiting relay or a current limiting relay, and it is not essential to protrude. In addition, even when projecting, it may project parallel to the bottom surface of the battery pack case below the relay instead of being perpendicular to the bottom surface of the battery pack case above the relay as shown in FIG. Furthermore, you may protrude in parallel with the bottom face of a battery pack case in the upper direction.

3 1st main relay 4 2nd main relay 6a 1st resistor 6b 2nd resistor 31 1st main contact part 32 Current limit contact part 41 2nd main contact part 61 Current limit relay device 322 1st wiring Part 324 second wiring part

Claims (8)

In the current limiting relay device (61) that cuts off the current and energizes the limited current,
A current limiting relay section (34) having a current limiting contact section (32) for passing a limited current between the first terminal (321) and the second terminal (323);
A first resistor (6a) connected to the first terminal (321) on one end side of the current limiting contact portion (32);
A second resistor (6b) connected to the second terminal (323) on the other end side of the current limiting contact portion (32);
A first wiring part (322) connecting the first terminal (321) and the first resistor (6a);
A current limiting relay device comprising: a second wiring portion (324) for connecting the second terminal (323) and the second resistor (6b).   2. The current limiting according to claim 1, wherein the first wiring part (322) is configured by a bus bar or a metal plate for wiring the first terminal (321) and the first resistor (6 a). Relay device.   3. The current limiting according to claim 1, wherein the first resistor (6 a) and the second resistor (6 b) are fixedly attached to the current limiting relay unit (34). Relay device.   The current limiting relay device according to claim 3, wherein the first resistance (6a) and the second resistance (6b) are attached to both sides of the current limiting relay section (34). .   The electrical terminal of the first resistor (6a) and the bracket for mounting the first resistor (6a) are integrally formed of the same metal material to form a single member. The current limiting relay device according to any one of the above. A power supply device (1) using the current limiting relay device (61) according to any one of claims 1 to 5,
Power supply (2);
A load device (5) to which power is supplied from the power source (2);
A main contact portion (31 or 41) provided between the power source (2) and the load device (5) and through which a main current from the power source (2) flows,
The main contact portion (31 or 41) and the current limiting relay device (61) are connected in parallel.   The power supply device according to claim 6, wherein the main contact portion (31 or 41) and the current limiting contact portion (32) are configured in the same relay. The power source (2) includes a battery mounted on the vehicle,
The load device (5) includes an inverter (501) and a motor (502) driven by the inverter (501) to drive the vehicle,
A capacitor (50) in parallel with the load device (5);
The main contact portion (31 or 41) is turned on after the current limiting relay device (61) applies a precharge current to the capacitor (50). The power supply device according to 6 or 7.

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