Power supply device

Abstract

The aim is to provide a power supply device in which changing the load with current redundancy is simple. The power supply device is configured to connect a current transformer 130 between a first connection to the power supply 110 for connecting a first power supply and a second connection to the power supply 120 for connecting a second power supply; to connect a first switch 150 and a second switch 160 between a first connection point CP1 between the current transformer 130 and a break switch 140 and a second connection point CP2 between the current transformer 130 and the second connection to the power supply 120; to include a plurality of load connections 170 for connecting loads and a plurality of load switches 180 that correspond one-to-one to the plurality of load connections 170.wherein each of the plurality of terminals for load 170 is connected to a line that connects the first switch 150 and the second switch 160 via the corresponding load switch 180.

Description

[Technical field]

[0001] The present disclosure relates to a power supply device. [State of the art]

[0002] When using a vehicle, it is possible that the power supply to the load needs to be maintained for functions such as driving, steering, stopping, opening / closing doors, and the like. Accordingly, a technology for achieving power redundancy by incorporating a sub-battery in addition to a main battery is being developed (see, for example, patent document 1). [CITING LIST][Patent Documents]

[0003] [Patent document JP 2021-29093 A [Summary of the invention][Technical problem]

[0004] However, according to the technology disclosed in patent document 1, the circuit with power redundancy and the circuit without power redundancy are designed separately during circuit development. Accordingly, in a case where the load without power redundancy is to be replaced with the load with power redundancy, it is necessary to redesign the entire circuit.

[0005] Accordingly, it is an object of the present invention to provide a power supply device in which changing the load with power redundancy is simple. [Solution to the problem]

[0006] To solve the technical problem described above, a power supply device according to one embodiment of the present invention comprises a first power supply terminal for connecting a first power supply; a second power supply terminal for connecting a second power supply; a current transformer connected between the first power supply terminal and the second power supply terminal; an interruption circuit connected between the first power supply terminal and the current transformer; a first switch and a second switch connected between a first connection point between the current transformer and the interruption circuit and a second connection point between the current transformer and the second power supply terminal; and a plurality of load terminals for connecting loads.and a plurality of load switches corresponding one-to-one to the plurality of load connections, each of the plurality of load connections being connected to a line linking the first switch and the second switch via the corresponding load switch.

[0007] A 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, if a power supply connected to the first power supply terminal is abnormal, switching off the interrupt circuit and the first switch; switching on the second switch; switching on the load switches corresponding to the load terminals to which the first loads, for which power redundancy is required, are connected under the plurality of load terminals; and switching off the load switches corresponding to the load terminals to which the second loads, for which power redundancy is not required, are connected under the plurality of load terminals.

[0008] A control program according to an embodiment of the present invention causes a computer to execute the control procedure described above.

[0009] A recording medium according to an embodiment of the present invention is a computer-readable recording medium for recording the control program described above. [Effect of the invention]

[0010] According to the present invention, it is possible to provide a power supply device in which load switching with power redundancy is simple. [Brief description of the drawings] Fig. Figure 1 is a view showing a power supply device 100 according to an embodiment of the present invention. Fig. Figure 2 is a view to describe a power flow during a normal period. Fig. Figure 3 is a view to describe a current flow when a first power supply connected to a first terminal for power supply 110 is abnormal. Fig. Figure 4 is a view showing an example of processing operations in a tax section 190. Fig. Figure 5 is a view showing a power supply device 100 according to an embodiment of the present invention. [Description of the embodiments]<Stromversorgungsvorrichtung 100>

[0011] Fig. Figure 1 shows a power supply device 100 according to an embodiment of the present invention. The power supply device 100 includes a first power supply connection 110, a second power supply connection 120, a current transformer 130, a circuit breaker 140, a first switch 150, a second switch 160, a plurality of loads 170, a plurality of load switches 180, and a control section 190.

[0012] The first connection for power supply 110 is a connection for connecting a first power supply. The first power supply is, for example, as shown in Fig. 1 shown, a main battery MB. The first connection to the power supply 110, as shown in Fig. Figure 1 shown can be configured to be connected to an ALT power generator.

[0013] The second connection for power supply 120 is for connecting a second power supply. The second power supply is, for example, as shown in... Fig. 1 shown, a sub-battery SB.

[0014] The current transformer 130 is a DC / DC converter configured to convert input power and output the converted power. The current transformer 130 is connected between the first terminal of power supply 110 and the second terminal of power supply 120. For example, if the first terminal of power supply 110 is connected to the main battery MB as the primary power supply and the second terminal of power supply 120 is connected to the sub-battery SB as the secondary power supply, the current transformer 130 will supply sub-battery SB with the power output from the main battery MB.

[0015] The interrupt circuit 140 has two terminals and is configured to switch between a connected state, in which the two terminals are connected, and an open state, in which the two terminals are disconnected. The interrupt circuit 140 is connected between the first terminal of the power supply 110 and the current transformer 130. The interrupt circuit 140 is preferably configured by two switching elements (for example, MOSFETs (metal-oxide-semiconductor field-effect transistors)) connected in a directly sequential manner.

[0016] A first switch 150 and a second switch 160 are connected between a first connection point CP1, located between the current transformer 130 and the interrupt circuit 140, and a second connection point CP2, located between the current transformer 130 and the second connection to the power supply 120. As shown in Fig. As shown in Figure 1, the first switch 150 is connected to the side of the first connection point CP1, and the second switch 150 is connected to the side of the second connection point CP2.

[0017] Each of the multiple connections for load 170 is a connection for the load and corresponds to the multiple load switches 180 in a one-to-one correspondence. As in Fig. As shown in Figure 1, each of the multiple terminals for load 170 is connected to a line that connects the first switch 150 and the second switch 160 via the corresponding load switch 180. The loads connected to the multiple terminals for load 170 include a first load L1, for which power redundancy is required (for example, the load associated with the functions driving, steering, stopping, and opening / closing the door), and a second load L2, for which power redundancy is not required. In the diagram shown in Fig. In the example shown, the power supply device 100 includes two terminals for load 170, one terminal for load 170 being connected to the first load L1 and the other terminal for load 170 being connected to the second load L2. Each of the plurality of load switches 180 is, for example, an Intelligent Power Device (IPD).

[0018] Accordingly, 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 connection 110 and the plurality of load connections 170. Accordingly, according to the present embodiment, when the interrupt circuit 140 is in the connected state, the first switch 150 is switched on, and the load switch 180 is switched on, the first power supply connection 110 and the load connection 170 are in an electrically connected state, and as shown in Fig. 2 shown, from the first power supply (for example, main battery MB), which is connected to the first connection to power supply 110, to the loads (in which in Fig. In the example shown in 2, the first load L1 and the second load L2), which are connected to the terminal for the load 170, power is supplied via the interrupt circuit 140, the first switch 150 and the load switch 180.

[0019] Furthermore, 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 connection 120 and the plurality of load connections 170. Accordingly, when the second switch 160 is open and the load switch 180 is open, the second power supply connection 120 and the load connection 170 are in the electrically connected state, and as shown in Fig. As shown in Figure 3, the power supply is routed from the power supply (for example, the sub-battery SB), which is connected to the second terminal of the power supply 120, to the load (in which in Fig. In example 3, the first load L1), which is connected to the terminal for load 170, is supplied with power via the second switch 160 and the load switch 180.

[0020] Control section 190 controls the interrupt circuit 140, the first switch 150, the second switch 160, and the majority of the load switches 180. Control section 190 is configured, for example, by a computer. Control section 190 is configured to control the interrupt circuit 140, the first switch 150, the second switch 160, and the majority of the load switches 180 based on whether the power supply (for example, the main battery MB) connected to the first terminal of the power supply 110 is functioning normally. For example, control section 190 measures the voltage value of the current input to the first terminal of the power supply 110, and if the measured voltage value is equal to or greater than a predetermined value, it determines that the power supply (for example, the main battery MB) connected to the first terminal of the power supply 110 is functioning normally. <Steuerung während normalen Periode>

[0021] During a normal period, that is, when the primary power supply (for example, the main battery MB), which is connected to the first power supply terminal 110, is functioning normally, as in Fig. As shown in Figure 2, the control section 190 puts the interrupt circuit 140 into the connected state, switches on the first switch 150 and the majority of the load switches 180, and switches off the second switch 160. Accordingly, according to the present embodiment, if the power supply connected to the first terminal of the power supply 110 is normal, as shown in Figure 2, the following applies: Fig. Figure 2 shows how to supply power from the power supply connected to the first terminal for power supply 110 to the load connected to the terminal for load 170. <Steuerung, wenn die Hauptbatterie MB anormal ist>

[0022] If the first power supply (for example, the main battery MB), which is connected to the first connection to power supply 110, is abnormal, as in Fig. As shown in Figure 3, the control section 190 puts the interrupt circuit 140 into the open state, switches off the first switch 150 and switches on the second switch 160. Furthermore, at this time, the control section 190 switches, as shown in Figure 3, the circuit 140 is in the open state. Fig. Figure 3 shows the following: The load switch 180, which corresponds to the terminal for load 170 connected to the first load L1 (the load requiring power redundancy), is switched on, and the load switch 180, which corresponds to the terminal for load 170 connected to the second load L2 (the load where power redundancy is unnecessary), is switched off. At this point, the control section 190 can be configured to store information about the first load L1 or the second load L2 connected to each of the multiple terminals for load 170 in advance and control the load switch 180 based on this information.

[0023] Accordingly, according to the present embodiment, if the power supply connected to the first terminal of the power supply 110 is abnormal, as in Fig. Figure 3 shows how to supply the load (the first load L1) where current redundancy is required with power from the power supply (for example, the sub-battery SB) which is connected to the second terminal of the power supply 120.

[0024] If the load (the second load L2) for which power redundancy is not required is replaced by the load (the first load L1) for which power redundancy is required, then according to the present embodiment, it is only necessary to change the software of the control section 190, while it is not necessary to change its circuit design. Accordingly, according to the present embodiment, it is possible to provide a power supply device in which changing the load with power redundancy is simple.

[0025] Fig. Figure 4 is a view showing an example of processing operations in control section 190. Control section 190 is configured such that during the period when the first power supply (for example, the main battery MB), which is connected to the first power supply terminal 110, is normal (step S401, JA), control section 190 puts the interrupt circuit 140 into the connected state, turns on the first switch 150 and the majority of load switches 180, and turns off the second switch 160 (step S402).During the period in which the first power supply (for example, the main battery MB), which is connected to the first terminal for power supply 110, is abnormal (step S401, NO), the control section 190 puts the interrupt circuit 140 into the open state, switches off the first switch 150, switches on the second switch 160, switches on the load switch 180, which corresponds to the terminal for the load 170, which is connected to the first load L1 (the load where power redundancy is necessary), and switches off the load switch 180, which corresponds to the terminal for the load 170, which is connected to the second load L2 (the load where power redundancy is unnecessary) (step S403). <Verwendung der Unterbatterie SB>

[0026] The main battery MB is connected to the first connection to the power supply 110, and the sub-battery SB is connected to the second connection to the power supply 120, however, during the period in which the main battery MB is normal (that is, during the normal period), the sub-battery SB can be used instead of the main battery MB.

[0027] For example, the control section 190 can be configured such that, when the first power supply connected to the first terminal for power supply 110 is normal and some loads (for example, the first load L1) among the loads connected to the majority of terminals for load 170 are not in use, it puts the interrupting circuit 140 into the interrupted state, switches off the first switch 150, switches on the second switch 160, switches on the load switches 180 corresponding to the terminals for load 170 connected to the loads in use among the majority of terminals for load 170, and switches off the load switches 180 corresponding to the terminals for load 170 connected to the loads not in use among the majority of terminals for load 170.

[0028] In this way it is possible to shorten the usage time of the MB main battery and thus extend the lifespan of the MB main battery. <Erster Schalter 150 und zweiter Schalter 160>

[0029] As in Fig. As shown in Figure 5, the first switch 150 can, for example, be configured from a switching element (e.g., a MOSFET) that has a body diode. To prevent reverse current flow, the forward direction of the body diode is set so that it runs from the first connection point CP1 to the load switch 180. In the Fig. In the example shown in Figure 5, the first switch 150 is an N-type MOSFET, with the source connected to the first connection point CP1 and the drain connected to the load switch 180.

[0030] As in Fig. As shown in Figure 5, the second switch 160 can, for example, be configured from a switching element (e.g., a MOSFET) that has a body diode. To prevent reverse current flow, the forward direction of the body diode is set so that it leads from the second connection point CP2 to the load switch 180. In the Fig. In the example shown in Figure 5, the first switch 150 is an N-type MOSFET, with the source connected to the second connection point CP2 and the drain connected to the load switch 180.

[0031] As in Fig.As shown in Figure 5, in the case where the first switch 150 and the second switch 160 consist of switching elements with their respective body diodes, the forward direction of the body diode of the first switch 150 being oriented such that it runs from the first connection point CP1 to the load switch 180, and the forward direction of the body diode of the second switch 160 being oriented such that it runs from the second connection point CP2 to the load switch 180, the connection between the first switch 150 and the second switch 160 is in a directly successive manner. Accordingly, in this case, when either the first switch 150 or the second switch 160 is off, no power flow is generated passing through both the first switch 150 and the second switch 160.

[0032] The present invention has been described above with reference to preferred embodiments of the present invention. Although the present invention has been described here with reference to specific examples, various modifications and changes to these examples can be made without departing from the spirit and scope of the invention as set out in the claims. [List of reference symbols] 100 Power supply device 110 first connection to the power supply 120 second connection for power supply 130 current transformers 140 Interruption circuit 150 first switch 160 second switch 170 connection for load 180 load switches 190 Tax Section QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] JP 2021-29093 A

[0003]

Claims

[1] A power supply device comprising: a first connection to the power supply for connecting a first power supply; a second power supply connection for connecting a second power supply; a current transformer connected between the first power supply connection and the second power supply connection; an interrupt circuit connected between the first power supply connection and the current transformer; a first switch and a second switch connected between a first connection point between the current transformer and the interrupt circuit and a second connection point between the current transformer and the second connection to the power supply; a plurality of connections for loads for connecting loads; and a plurality of load switches that correspond one-to-one to the plurality of connections for loads, wherein each of the plurality of load connections is connected to a line that connects the first switch and the second switch via the corresponding load switch. [2] The power supply device according to claim 1, wherein the first switch is a switching element connected between the first connection point and the plurality of load switches and has a body diode with a forward direction set as a direction from the first connection point to the plurality of load switches, and the second switch is a switching element that is connected between the second connection point and the plurality of load switches and has a body diode with a forward direction set as 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 section configured to control the first switch, the second switch and the load switches, where the first switch is connected between the first connection point and the majority of terminals for load, the second switch is connected between the second connection point and the majority of terminals for load, the control section is configured so that if a power supply connected to the first power supply terminal is abnormal, put the interrupt circuit into an interrupted state, switch off the first switch, turns on the second switch, the load switches that correspond to the load terminals, with which the first loads, where power redundancy is required, are connected under the majority of load terminals, are switched on, and the load switches that correspond to the load terminals, with which second loads, where power redundancy is not required, are connected under the majority of load terminals, are switched off. [5] The power supply device according to claim 4, wherein the control section is configured such that when the power supply connected to the first power supply terminal is normal and some loads among the loads connected to the majority of load terminals are not in use, to put the interrupt circuit into an interrupted state, turns off the first switch, turns on the second switch, the load switches that correspond to the load terminals to which the loads used are connected from the majority of the load terminals, and The load switches that correspond to the load terminals, to which the unused loads are connected under the majority of load terminals, are switched 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, wherein the control method comprises: if a power supply connected to the first power supply terminal is abnormal, Switching off the interrupt circuit and the first switch; Switching on the second switch; Switching on the load switches corresponding to the load terminals to which the first loads, where power redundancy is required, are connected under the majority of load terminals; and Switching off the load switches that correspond to the load terminals to which secondary loads, where power redundancy is not required, are connected under the majority of load terminals. [7] A control program to cause a computer to execute the control procedure according to claim 6. [8] A computer-readable recording medium configured to record the control program according to claim 7.

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