Power supply device

Abstract

The purpose of the present invention is to provide a power supply device in which a redundant load of a power supply can be easily changed. The power supply device is configured such that a power converter (130) is connected between a first power supply terminal (110) for connecting a first power supply and a second power supply terminal (120) for connecting a second power supply. The interrupt circuit (140) is connected between the first power supply terminal (110) and the power converter (130). A first switch (150) and a second switch (160) are connected between a first connection point (CP1) between the power converter (130) and the interrupt circuit (140) and a second connection point (CP2) between the power converter (130) and the second power supply terminal (120). Comprising a plurality of load terminals (170) for connecting loads, and a plurality of load switches (180) corresponding to the plurality of load terminals (170) one by one, in which the plurality of load terminals (170) are respectively connected to a line connecting the first switch (150) and the second switch (160) via the corresponding load switches (180).

Description

Technical Field

[0001] The present disclosure relates to a power supply device. Background Art

[0002] When the vehicle is in use, it is possible to maintain power supply to loads related to functions such as driving, steering, stopping, and opening / closing doors. As a result, a technology for achieving power redundancy by including a sub-battery in addition to a main battery has been developed (for example, see Patent Document 1).

[0003] [Citation List]

[0004] [Patent Document]

[0005] [Patent Document 1] JP 2021-29093A Summary of the invention

[0006] [Technical issues]

[0007] However, according to the technology disclosed in Patent Document 1, according to conventional technology, in the circuit design process, a circuit with power redundancy and a circuit without power redundancy are designed separately. Therefore, when a load without any power redundancy is changed to a load with power redundancy, the entire circuit needs to be redesigned.

[0008] Therefore, an object of the present invention is to provide a power supply device in which a load to which power supply redundancy is provided can be easily changed.

[0009] [Solution to the problem]

[0010] In order to solve the above technical problems, a power supply device according to an embodiment of the present invention includes: a first power supply terminal, which is used to connect a first power supply; a second power supply terminal, which is used to connect a second power supply; a power converter, which is connected between the first power supply terminal and the second power supply terminal; an interrupt circuit, which is connected between the first power supply terminal and the power converter; a first switch and a second switch, which are connected between a first connection point between the power converter and the interrupt circuit and a second connection point between the power converter and the second power supply terminal; a plurality of load terminals, which are used to connect loads; and a plurality of load switches, which correspond one-to-one to the plurality of load terminals, wherein each of the plurality of load terminals is connected to a line connecting the first switch and the second switch via a corresponding load switch.

[0011] The control method according to an embodiment of the present invention is a control method executed by a computer to control the interrupt circuit, the first switch, the second switch and the load switch of the power supply device according to claim 1, wherein the control method includes: when the power supply connected to the first power terminal is abnormal, disconnecting the interrupt circuit and the first switch; turning on the second switch; turning on the load switch corresponding to the load terminal connected to the first load requiring power redundancy among the multiple load terminals; and disconnecting the load switch corresponding to the load terminal connected to the second load not requiring power redundancy among the multiple load terminals.

[0012] The control program according to the embodiment of the present invention causes a computer to execute the above-mentioned control method.

[0013] The recording medium according to the embodiment of the present invention is a computer-readable recording medium recording the above-mentioned control program.

[0014] [Effects of the invention]

[0015] According to the present invention, it is possible to provide a power supply device in which a load for which power supply redundancy is made easy to change. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a view showing a power supply device 100 according to an embodiment of the present invention.

[0017] Figure 2 It is a view used to describe the flow of power during normal periods.

[0018] Figure 3 1 is a diagram for describing the flow of power when the first power supply connected to the first power supply terminal 110 is abnormal.

[0019] Figure 4 is a diagram showing an example of a processing operation in the control section 190 .

[0020] Figure 5 is a view showing a power supply device 100 according to an embodiment of the present invention.

[0021] Reference Mark List

[0022] 100 Power supply unit

[0023] 110 First power supply terminal

[0024] 120 Second power supply terminal

[0025] 130 Power Converter

[0026] 140 Interrupt Circuit

[0027] 150 First switch

[0028] 160 Second switch

[0029] 170 Load terminal

[0030] 180 Load Switch

[0031] 190 Control Department DETAILED DESCRIPTION

[0032] <Power Supply Device 100>

[0033] Figure 1 1 is a view showing a power supply device 100 according to an embodiment of the present invention. The power supply device 100 includes a first power supply terminal 110, a second power supply terminal 120, a power converter 130, an interruption circuit 140, a first switch 150, a second switch 160, a plurality of loads 170, a plurality of load switches 180, and a control unit 190.

[0034] The first power supply terminal 110 is a terminal for connecting to a first power supply. Figure 1 As shown, the first power source is the main battery MB. Figure 1 As shown, the first power supply terminal 110 may be configured to be connected to the alternator ALT.

[0035] The second power supply terminal 120 is a terminal for connecting a second power supply. Figure 1 As shown, the second power source is a sub-battery SB.

[0036] The power converter 130 is a DC / DC converter configured to convert input power and output the converted power. The power converter 130 is connected between the first power terminal 110 and the second power terminal 120. When the first power terminal 110 is connected to the main battery MB as the first power source and the second power terminal 120 is connected to the sub-battery SB as the second power source, for example, the power converter 130 supplies the power output from the main battery MB to the sub-battery SB.

[0037] The interrupt circuit 140 includes two terminals and is configured to switch between a connection state in which the two terminals are connected and a disconnection state in which the two terminals are disconnected. The interrupt circuit 140 is connected between the first power supply terminal 110 and the power converter 130. The interrupt circuit 140 is preferably composed of two switching elements (e.g., MOSFETs (metal oxide semiconductor field effect transistors)) connected in a back-to-back manner.

[0038] The first switch 150 and the second switch 160 are connected between a first connection point CP1 and a second connection point CP2. The first connection point CP1 is located between the power converter 130 and the interruption circuit 140, and the second connection point CP2 is located between the power converter 130 and the second power supply terminal 120. Figure 1 As shown, the first switch 150 is connected to the first connection point CP1 side, and the second switch 150 is connected to the second connection point CP2 side.

[0039] Each of the plurality of load terminals 170 is a terminal for connecting a load, and corresponds to the plurality of load switches 180 in a one-to-one correspondence. Figure 1 As shown, each of the plurality of load terminals 170 is connected to a line connecting the first switch 150 and the second switch 160 via a corresponding load switch 180. The loads connected to the plurality of load terminals 170 include a first load L1 that requires power redundancy (e.g., loads related to functions of driving, steering, stopping, and opening / closing a door) and a second load L2 that does not require power redundancy. Figure 1 In the example shown, the power supply apparatus 100 includes two load terminals 170 , one of which is connected to a first load L1 and the other is connected to a second load L2 . Each of the plurality of load switches 180 is, for example, an intelligent power device (IPD).

[0040] Thus, in the present embodiment, the first switch 150 is connected between the first connection point CP1 and the plurality of load switches 180. That is, according to the present embodiment, the interrupt circuit 140, the first switch 150, and the load switch 180 are connected between the first power supply terminal 110 and the plurality of load terminals 170. Thus, according to the present embodiment, when the interrupt circuit 140 is in the connected state, the first switch 150 is turned on, and the load switch 180 is turned on, the first power supply terminal 110 and the load terminal 170 are in the electrically connected state, and as shown in FIG. Figure 2 As shown, from the first power source (for example, the main battery MB) connected to the first power terminal 110 to the load (at the load terminal 170) connected to the load terminal 170 Figure 2 In the example described, the first load L1 and the second load L2 are supplied with power via the interruption circuit 140 , the first switch 150 , and the load switch 180 .

[0041] In addition, according to the present embodiment, the second switch 160 is connected between the second connection point CP2 and the plurality of load switches 180. That is, according to the present embodiment, the second switch 160 and the load switch 180 are connected between the second power supply terminal 120 and the plurality of load terminals 170. Thus, when the second switch 160 is turned on and the load switch 180 is turned on, the second power supply terminal 120 and the load terminal 170 are in an electrically connected state, and as shown in FIG. Figure 3 As shown, from the power source (for example, the sub-battery SB) connected to the second power terminal 120 to the load (in Figure 3 In the example shown in , the first load L1) is supplied with power via the second switch 160 and the load switch 180.

[0042] The control unit 190 controls the interrupt circuit 140, the first switch 150, the second switch 160, and the plurality of load switches 180. For example, the control unit 190 is configured by a computer. The control unit 190 is configured to control the interrupt circuit 140, the first switch 150, the second switch 160, and the plurality of load switches 180 based on whether the power source (e.g., the main battery MB) connected to the first power terminal 110 is normal. For example, the control unit 190 measures the voltage value of the power input to the first power terminal 110, and when the measured voltage value is equal to or greater than a predetermined value, it is determined that the power source (e.g., the main battery MB) connected to the first power terminal 110 is normal.

[0043] <Control during normal period>

[0044] During the normal period, that is, when the first power source (eg, main battery MB) connected to the first power source terminal 110 is normal, as shown in FIG. Figure 2 As shown in FIG. 1 , the control unit 190 places the interruption circuit 140 in a connection state, turns on the first switch 150 and the plurality of load switches 180, and turns off the second switch 160. Thus, according to this embodiment, when the power supply connected to the first power supply terminal 110 is normal, as shown in FIG. Figure 2 As shown, power can be supplied from the power source connected to the first power source terminal 110 to the load connected to the load terminal 170 .

[0045] <Control when the main battery MB is abnormal>

[0046] When the first power source (for example, the main battery MB) connected to the first power source terminal 110 is abnormal, Figure 3 As shown in FIG. 1 , the control unit 190 places the interruption circuit 140 in the cut-off state, disconnects the first switch 150, and connects the second switch 160. Figure 3As shown, the control unit 190 turns on the load switch 180 corresponding to the load terminal 170 connected to the first load L1 (a load requiring power redundancy), and turns off the load switch 180 corresponding to the load terminal 170 connected to the second load L2 (a load not requiring power redundancy). At this time, the control unit 190 may be configured to pre-store information about the first load L1 or the second load L2 being connected to each of the plurality of load terminals 170, and control the load switch 180 based on the information.

[0047] Thus, according to this embodiment, when the power connected to the first power terminal 110 is abnormal, Figure 3 As shown, electric power can be supplied from the power source (for example, the sub-battery SB) connected to the second power source terminal 120 to the load (the first load L1) requiring power redundancy.

[0048] Furthermore, according to the present embodiment, when a load that does not require power redundancy (the second load L2) is changed to a load that requires power redundancy (the first load L1), only the software of the control unit 190 needs to be changed, and there is no need to change its circuit design. Thus, according to the present embodiment, a power supply device can be provided in which the load to which power redundancy is applied can be easily changed.

[0049] Figure 4 4 is a view showing an example of processing operations in the control section 190. The control section 190 is configured such that, during a period in which the first power source (e.g., main battery MB) connected to the first power source terminal 110 is normal (step S401, yes), the control section 190 places the interruption circuit 140 in a connected state, turns on the first switch 150 and the plurality of load switches 180, and turns off the second switch 160 (step S402). During a period in which the first power source (e.g., main battery MB) connected to the first power source terminal 110 is abnormal (step S401, no), the control section 190 places the interruption circuit 140 in a disconnected state, turns off the first switch 150, turns on the second switch 160, turns on the load switch 180 corresponding to the load terminal 170 connected to the first load L1 (load requiring power redundancy), and turns off the load switch 180 corresponding to the load terminal 170 connected to the second load L2 (load not requiring power redundancy) (step S403).

[0050] <Utilization of Sub-Battery SB>

[0051] The main battery MB is connected to the first power supply terminal 110 and the sub-battery SB is connected to the second power supply terminal 120 , however, during a period when the main battery MB is normal (ie, during a normal period), the sub-battery SB may be used instead of the main battery MB.

[0052] For example, the control unit 190 can be configured to, when the first power supply connected to the first power supply terminal 110 is normal and some of the loads connected to the multiple load terminals 170 (for example, the first load L1) are not in use, place the interrupt circuit 140 in a cut-off state, disconnect the first switch 150, connect the second switch 160, connect the load switch 180 corresponding to the load terminal 170 connected to the load in use among the multiple load terminals 170, and disconnect the load switch 180 corresponding to the load terminal 170 connected to the unused load among the multiple load terminals 170.

[0053] In this way, the use period of the main battery MB can be shortened, thereby extending its service life.

[0054] <First Switch 150 and Second Switch 160>

[0055] For example, Figure 5 As shown, the first switch 150 may be formed of a switch element (eg, MOSFET) having a body diode. At this time, in order to prevent reverse flow, the forward direction of the body diode is set from the first connection point CP1 to the load switch 180. Figure 5 In the example shown, the first switch 150 is an N-type MOSFET, with a source connected to the first connection point CP1 and a drain connected to the load switch 180 .

[0056] For example, Figure 5 As shown, the second switch 160 may be formed of a switch element (eg, MOSFET) having a body diode. At this time, in order to prevent reverse flow, the forward direction of the body diode is set to be from the second connection point CP2 to the load switch 180. Figure 5 In the example shown, the first switch 150 is an N-type MOSFET, with a source connected to the second connection point CP2 and a drain connected to the load switch 180 .

[0057] like Figure 5 As shown, in the case where the first switch 150 and the second switch 160 are respectively made of switch elements having body diodes, wherein the forward direction of the body diode of the first switch 150 is set to be from the first connection point CP1 to the load switch 180, and the forward direction of the body diode of the second switch 160 is set to be from the second connection point CP2 to the load switch 180, the connection between the first switch 150 and the second switch 160 is back-to-back. Thus, in this case, when either of the first switch 150 and the second switch 160 is disconnected, power flow through both the first switch 150 and the second switch 160 is not generated.

[0058] The present invention has been described above using the preferred embodiments of the present invention. Although the present invention has been described by referring to specific examples, various modifications and changes can be made to these examples without departing from the spirit and scope of the present invention as described in the claims.

Claims

1. A power supply device, comprising: A first power supply terminal, the first power supply terminal is used to connect a first power supply; A second power supply terminal, the second power supply terminal is used to connect a second power supply; a power converter connected between the first power supply terminal and the second power supply terminal; an interrupt circuit connected between the first power supply terminal and the power converter; a first switch and a second switch, the first switch and the second switch being connected between a first connection point and a second connection point, the first connection point being between the power converter and the interruption circuit, and the second connection point being between the power converter and the second power supply terminal; a plurality of load terminals, the plurality of load terminals being used to connect a load; and a plurality of load switches, wherein the plurality of load switches correspond one-to-one to the plurality of load terminals; Each of the plurality of load terminals is connected to a line connecting the first switch and the second switch via a corresponding load switch.

2. The power supply device according to claim 1, in, The first switch is a switch element connected between the first connection point and the plurality of load switches, and has a body diode whose forward direction is set in a direction from the first connection point to the plurality of load switches, and The second switch is a switch element connected between the second connection point and the plurality of load switches, and has a body diode whose forward direction is set in a direction from the second connection point to the plurality of load switches.

3. The power supply device according to claim 1, wherein: The load switch is an intelligent power device.

4. The power supply device according to claim 1, further comprising a control unit configured to control the first switch, the second switch, and the load switch, in, The first switch is connected between the first connection point and the plurality of load terminals. The second switch is connected between the second connection point and the plurality of load terminals. The control unit is configured to, when a power source connected to the first power terminal is abnormal, placing the interrupt circuit in a cut-off state, disconnecting the first switch, Turning on the second switch, The load switch corresponding to the load terminal to which the first load requiring power redundancy is connected among the plurality of load terminals is turned on, and The load switch corresponding to the load terminal to which the second load not requiring power redundancy is connected among the plurality of load terminals is turned off.

5. The power supply device according to claim 4, in, The control unit is configured to, when the power source connected to the first power terminal is normal and a part of the loads connected to the plurality of load terminals are not in use, placing the interrupt circuit in a cut-off state, disconnecting the first switch, Turning on the second switch, The load switch corresponding to the load terminal to which the load in use is connected among the plurality of load terminals is turned on, and The load switch corresponding to the load terminal to which an unused load is connected among the plurality of load terminals is turned off.

6. A control method executed by a computer to control the interrupt circuit, the first switch, the second switch and the load switch of the power supply device according to claim 1, the control method comprising: When the power connected to the first power terminal is abnormal, disconnecting the interruption circuit and the first switch; turning on the second switch; turning on the load switch corresponding to the load terminal to which the first load requiring power redundancy is connected among the plurality of load terminals; and The load switch corresponding to the load terminal to which the second load not requiring power redundancy is connected among the plurality of load terminals is turned off.

7. A control program for causing a computer to execute the control method according to claim 6.

8. A computer-readable recording medium configured to record the control program according to claim 7.

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