JP6416643B2 - Service plug - Google Patents

Description

  The present invention relates to a service plug.

  2. Description of the Related Art Conventionally, service plugs configured to be insertable / removable with respect to a plug receiving portion arranged on a path from a battery (high voltage storage battery) to a load (high voltage device) have been proposed. When this service plug is removed from the plug receiving portion, the interlock switch is turned off, and this information is transmitted to the interlock control portion. Thereby, an interlock control part opens the relay provided on the path | route from a battery to load (refer patent document 1).

JP 2012-2047 A

  Here, in the apparatus described in Patent Document 1, the relay is opened when the service plug is removed. Further, in the device described in Patent Document 1, even when the service plug is not removed, for example, when the battery voltage is abnormal, the relay is opened.

  However, in the apparatus described in Patent Document 1, the service plug and the relay are separate, and a switch or a signal line that detects that the service plug has been removed in order to turn off the relay when the service plug is removed. Etc. are required, and the number of parts increases. In addition, in the device described in Patent Document 1, a mechanical relay is used as the relay, and as the current from the battery to the load increases, the relay also increases in size, leading to an increase in size of the entire device. End up.

  The present invention has been made to solve such a conventional problem, and an object of the present invention is to provide a service plug capable of suppressing an increase in the number of components and an increase in the size of the entire apparatus. It is to provide.

  The service plug according to the present invention is a service plug configured to be insertable / removable with respect to a plug receiving portion disposed on a path from the battery to a load, and in the state where the plug is inserted into the plug receiving portion, A first terminal connected to the path on the side, a second terminal connected to the path on the load side in a state of being inserted with respect to the plug receiving portion, and between the first terminal and the second terminal And a semiconductor element that cuts off or conducts between the first and second terminals by being on / off controlled.

  According to the service plug of the present invention, since a semiconductor element that cuts off or conducts between the first and second terminals by ON / OFF control is provided, a semiconductor element is used instead of a relay, and a mechanical relay is used. The increase in size is sometimes suppressed. In addition, since the semiconductor element is provided, the service plug and the semiconductor element can be integrated, and when the service plug is removed, there is no need to transmit a signal so as to turn off the semiconductor element. The configuration of is not required. Therefore, it is possible to provide a service plug capable of suppressing an increase in the number of parts and suppressing an increase in the size of the entire apparatus.

  The service plug of the present invention preferably further comprises a control circuit for controlling on / off of the semiconductor element.

  According to this service plug, since a control circuit for controlling on / off of the semiconductor element is further provided, for example, a signal from a sensor for measuring the battery voltage can turn off the semiconductor element from the control circuit when the battery voltage is abnormal, and suppress an inrush current. It can also have a function to do. In particular, when the function of suppressing the inrush current is provided, the functions of the precharge relay and the precharge resistor can be integrated, which can contribute to further miniaturization.

  ADVANTAGE OF THE INVENTION According to this invention, while suppressing the increase in a number of parts, the service plug which can suppress the enlargement of the whole apparatus can be provided.

It is a circuit diagram which shows the use location and schematic structure of the service plug which concern on embodiment of this invention. It is a perspective view which shows the mechanical structure of the service plug shown in FIG. FIG. 3 is a perspective view showing the internal configuration of the service plug shown in FIG. 2. It is a perspective view which shows the internal structure of the semiconductor circuit breaker shown in FIG.

  Preferred embodiments of the present invention will be described below with reference to the drawings. However, the present invention is not limited to the following embodiments.

  1 is a circuit diagram showing a service plug usage location and a schematic configuration according to an embodiment of the present invention, FIG. 2 is a perspective view showing a mechanical configuration of the service plug shown in FIG. FIG. 3 is a perspective view showing the internal configuration of the service plug shown in FIG. 2.

  As shown in FIG. 1, the service plug 1 is on a path R from a battery (a high voltage storage battery for traveling) B to a load (a high voltage load to which a high voltage is input from a battery B such as an inverter or a converter) L. An article having a plug structure to be provided. Specifically, as shown in FIG. 2, a plug receiving portion C having an electric wire W1 serving as a path R1 to the battery B side and an electric wire W2 serving as a path to the load L side is provided. The service plug 1 can be inserted into and removed from the part C.

  As shown in FIG. 3, the service plug 1 includes a first terminal T <b> 1, a second terminal T <b> 2, and a semiconductor circuit breaker S in a housing H. The first terminal T1 is connected to the electric wire W1 serving as the path R1 on the battery B side in the state where the service plug 1 is inserted into the plug receiving portion C. The second terminal T2 is connected to the electric wire W2 serving as the path R2 on the load L side in the state where the service plug 1 is inserted into the plug receiving portion C.

  More specifically, the first and second terminals T1, T2 are so-called male terminals, and the plug receiving portion C is formed with female terminals (not shown) connected to the electric wires W1, W2. When the service plug 1 is inserted into the plug receiving portion C, the male terminal and the female terminal are electrically connected.

  As shown in FIGS. 2 and 3, the housing H is formed with a lever operating portion O for assisting insertion / extraction of the service plug 1 with respect to the plug receiving portion C. By operating this, the operator can easily The service plug 1 can be inserted and removed.

  Further, the service plug 1 includes a semiconductor circuit breaker S between the first terminal T1 and the second terminal T2. FIG. 4 is a perspective view showing an internal configuration of the semiconductor circuit breaker shown in FIG. The semiconductor circuit breaker S includes a power device (semiconductor element) S1 that cuts off or conducts between the first and second terminals T1 and T2 by ON / OFF control.

  Specifically, the power device S1 is a MOSFET made of a material such as Si, SiC, and GaN mounted on the bus bar (drain electrode bus bar S4) via a die bond material, and the gate electrode is connected to the gate wire S2, The source electrode is connected to the source wire S3, and the drain electrode is connected to the drain electrode bus bar S4. A gate electrode bus bar S5 is provided on the side opposite to the gate electrode of the gate wire S2, and a source electrode bus bar S6 is provided on the side opposite to the source electrode of the source wire S3.

The drain electrode bus bar S4 is connected to the first terminal T1, and the source electrode bus bar S6 is connected to the second terminal T2. It is preferable that the drain electrode bus bar S4 and the first terminal T1 are not separate but integrated. That is, it is preferable that the drain electrode bus bar S4 extends outside the semiconductor circuit breaker S to form the first terminal T1. Similarly, it is preferable that the source electrode bus bar S6 and the second terminal T2 are not separate, and the source electrode bus bar S6 extends to the outside of the semiconductor circuit breaker S to form the second terminal T2.

The gate electrode bus bar S5 is provided with a gate control circuit (control circuit) S7 for outputting a signal for controlling on / off of the power device S1. The gate control circuit S7, by repeating the Oh-off operation, and a function of suppressing the inrush current. Furthermore, the gate control circuit S7 may be connected to, for example, a battery ECU. In this case, a signal indicating the battery voltage is transmitted from the battery ECU, and the gate control circuit S7 outputs a signal for turning off the power device S1 when the signal indicates a voltage abnormality.

  Next, the operation and the like of the service plug 1 according to the present embodiment will be described. Such a service plug 1 is provided with a power device S1 instead of a conventional mechanical relay, as is apparent from FIGS. For this reason, as the whole system shown in FIG. 1, the enlargement like when a mechanical relay is used is suppressed.

  In addition, the service plug 1 is removed from the plug receiving portion C at the time of maintenance of the load L, for example. In this embodiment, since the service plug 1 is integrated with the power device S1 that is an article equivalent to a relay, it is necessary to transmit a signal or the like so as to turn off the power device S1 when the service plug 1 is removed. There is no need for a switch or a signal line.

  Further, since the gate control circuit S7 has a function of suppressing the inrush current, the functions of the precharge relay and the precharge resistor can be integrated, which contributes to further miniaturization.

  In addition, when the gate control circuit S7 is connected to the battery ECU that measures the battery voltage, the power device S1 can be turned off when the battery voltage is abnormal, and the protection function during the abnormal voltage is not impaired. It has a configuration.

  In this way, according to the service plug 1 according to the present embodiment, the power device S1 that cuts off or conducts between the first and second terminals T1 and T2 by being turned on / off is provided. The device S1 is used, and an increase in size as when a mechanical relay is used is suppressed. In addition, since the power device S1 is provided, the service plug 1 and the power device S1 can be integrated, and when the service plug 1 is removed, there is no need to transmit a signal or the like to turn off the power device S1, No configuration of switches or signal lines is required. Therefore, it is possible to provide the service plug 1 that can suppress an increase in the number of components and suppress an increase in the size of the entire apparatus.

  In addition, since the gate control circuit S7 for controlling the on / off of the power device S1 is further provided, the power device S1 can be turned off from the gate control circuit S7 when the battery voltage is abnormal by a signal from a sensor for measuring the battery voltage, for example, and the inrush current It is also possible to provide a function to suppress. In particular, when the function of suppressing the inrush current is provided, the functions of the precharge relay and the precharge resistor can be integrated, which can contribute to further miniaturization.

  As described above, the present invention has been described based on the embodiment, but the present invention is not limited to the above embodiment, and may be modified without departing from the gist of the present invention.

  For example, the service plug 1 according to the present embodiment has a male terminal and the plug receiving part C has a female terminal. However, the service plug 1 has a female terminal and the plug receiving part C is not limited thereto. May have a male terminal.

  Furthermore, although the electric wires W1 and W2 are illustrated as the paths R1 and R2 from the plug receiving portion C, they are not limited to the electric wires W1 and W2 and may be connected to a bus bar. Furthermore, although MOSFET was illustrated as power device S1, other semiconductor elements which can be turned on / off, such as a transistor, may be sufficient.

  In the present embodiment, the semiconductor circuit breaker S includes the source wire S3 extending from the source electrode to the source electrode bus bar S6. However, the present invention is not limited to this, and for example, the source electrode bus bar S6 is directly connected to the source electrode. The source wire S3 may be unnecessary.

  Further, the service plug 1 according to the present embodiment may include a fuse in series with the semiconductor circuit breaker S, or a ceramic substrate on which a predetermined circuit is formed instead of the bus bars S4 to S6. May be used.

1: Service plug B: Battery C: Plug receiving part H: Housing L: Load O: Lever operation part R: Path S: Semiconductor circuit breaker S1: Power device S2: Gate wire S3: Source wire S4: Drain electrode bus bar S5: Gate electrode bus bar S6: Source electrode bus bar S7: Gate control circuit (control circuit)
T1: First terminal T2: Second terminal W1: Electric wire W2: Electric wire

Claims (2)

A service plug configured to be insertable / removable with respect to a plug receiving portion arranged on a path from a battery to a load,
A first terminal connected to a path on the battery side in a state of being inserted into the plug receiving portion;
A second terminal connected to a load-side path in a state of being inserted into the plug receiving portion;
A semiconductor element that is disposed between the first terminal and the second terminal and is controlled to be turned on / off to cut off or conduct between the first and second terminals;
A service plug comprising: The service plug according to claim 1, further comprising a control circuit that controls on / off of the semiconductor element.

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