On-vehicle power supply device and manufacturing method of on-vehicle power supply device

Abstract

To provide a power supply device that can be available for both a vehicle carrying multiple first loads and a vehicle carrying a second load having a larger rated current than the first loads while suppressing an increase in size.SOLUTION: An on-vehicle power supply device 10 comprises: a common route 12; multiple branch paths (first branch paths 20); and a shutoff unit (first shutoff unit 25) provided in each branch path (first branch path 20). Each branch path (first branch path 20) includes an upstream conductor (first upstream conductor 21) and a downstream conductor (first downstream conductor 22). Each shutoff unit (first shutoff unit 25), which is provided between the upstream conductor (first upstream conductor 21) and the downstream conductor (first downstream conductor 22), is switched from a permissible state to a shutoff state when the shutoff condition is satisfied. The multiple downstream conductors (first downstream conductors 22) are configured to be able to be mutually connected through a conductive member 80. In each downstream conductor (first downstream conductor 22), a connection section 26 is provided to be connected to the conductive member 80.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present disclosure relates to an on-vehicle power supply device and a method for manufacturing an on-vehicle power supply device. [Background technology]

[0002] Patent Document 1 discloses a power supply device that supplies power from a power source to a load circuit. This power supply device includes a semiconductor switch, a current detection unit, and an abnormality determination unit. The semiconductor switch is connected to a power supply line that supplies power from the power source to the load circuit. The current detection unit detects a current flowing through the power supply line. The abnormality determination unit determines an abnormality based on the current detected by the current detection unit. When the abnormality determination unit determines that an abnormality has occurred, it controls the semiconductor switch to limit the current flowing through the load circuit. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-45023 Summary of the Invention [Problem to be solved by the invention]

[0004] The rated current and number of loads mounted on a vehicle vary depending on the vehicle model, etc. If an attempt is made to configure a power supply device compatible with these various vehicle models, etc., using the technology of Patent Document 1, it is necessary to provide the same number of power supply lines and semiconductor switches as the number of loads for each rated current of the load, which raises concerns about an increase in the size of the power supply device.

[0005] One object of the present disclosure is to provide a technology that can realize a power supply device that can accommodate both a vehicle equipped with multiple first loads and a vehicle equipped with a second load having a higher rated current than the first loads, while preventing the device from becoming too large. [Means for solving the problem]

[0006] The in-vehicle power supply device of the present disclosure includes: a common path to which power is supplied based on a power supply unit; A plurality of branch paths branched off from the common path; a cut-off portion provided in each of the branch paths, Each of the branch paths has an upstream conductor and a downstream conductor provided on an opposite side of the upstream conductor from the common path side, each of the interrupting units is provided between the upstream conductor and the downstream conductor, and when an interrupting condition is satisfied, the interrupting unit switches from a permissive state in which a current flows from the upstream conductor side to the downstream conductor side to a blocking state in which the current flows, The downstream conductors are configured to be electrically connected to each other via a conductive member, Each of the downstream conductors is provided with a connection portion that is connected to the conductive member.

[0007] The method for manufacturing an in-vehicle power supply device according to the present disclosure includes: A preparation step of preparing an apparatus body including a common path to which power is supplied from a power supply unit, a plurality of branch paths branched from the common path, and a breaker unit provided in each of the branch paths, Each of the branch paths has an upstream conductor and a downstream conductor provided on an opposite side of the upstream conductor from the common path side, each of the interrupting units is provided between the upstream conductor and the downstream conductor, and when an interrupting condition is satisfied, the interrupting unit switches from a permissive state in which a current flows from the upstream conductor side to the downstream conductor side to a blocking state in which the current flows, Further, a selection step of selecting whether or not to connect the downstream conductors of the plurality of branch paths by a conductive member is included, The result of the selection in the selection step is applied to the device main body to configure an on-vehicle power supply device. Effect of the Invention

[0008] The technology disclosed herein makes it possible to realize a power supply device that can accommodate both a vehicle equipped with multiple first loads and a vehicle equipped with a second load having a higher rated current than the first loads, while preventing the device from becoming too large. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a diagram illustrating a configuration of an in-vehicle system including a power supply device according to the first embodiment. [Diagram 2] FIG. 2 is an explanatory diagram illustrating the power supply device in a state in which the downstream conductors are not connected by a conductive member. [Diagram 3] FIG. 3 is an explanatory diagram illustrating the power supply device in a state in which each downstream conductor is connected by a conductive member. [Figure 4] FIG. 4 is a schematic diagram illustrating an example of an in-vehicle system including a power supply device according to the second embodiment. [Diagram 5] FIG. 5 is an explanatory diagram illustrating a configuration around a changeover switch in a power supply device according to the third embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] In the following, embodiments of the present disclosure are listed and illustrated.

[0011] [1] a common path through which power is supplied based on a power supply unit; A plurality of branch paths branched off from the common path; a cut-off portion provided in each of the branch paths, Each of the branch paths has an upstream conductor and a downstream conductor provided on an opposite side of the upstream conductor from the common path side, each of the interrupting units is provided between the upstream conductor and the downstream conductor, and when an interrupting condition is satisfied, the interrupting unit switches from a permissive state in which a current flows from the upstream conductor side to the downstream conductor side to a blocking state in which the current flows, The downstream conductors are configured to be electrically connected to each other via a conductive member, Each of the downstream conductors is provided with a connection portion that is connected to the conductive member. An in-vehicle power supply device.

[0012] In the above-mentioned vehicle-mounted power supply device, when the multiple downstream conductors are not connected by a conductive member, the multiple branch paths are configured as separate paths. In addition, in the above-mentioned vehicle-mounted power supply device, when the multiple downstream conductors are connected by a conductive member, a path is configured in which currents supplied from a common path to the multiple branch paths merge at the downstream conductor. In other words, according to this configuration, it is possible to realize a power supply device that can be used for both a vehicle equipped with multiple first loads and a vehicle equipped with a second load having a rated current higher than that of the first loads, while suppressing an increase in size.

[0013] [2] A control unit for controlling the interrupter is provided, The control unit is capable of selectively executing a first control and a second control, the first control is a control for determining whether or not an individual interruption condition, which is one of the interruption conditions, is satisfied for each of the branch paths based on a current value flowing through each of the branch paths, and switching the interrupter provided in the branch path for which it is determined that the individual interruption condition is satisfied to the interruption state; The second control is a control for determining whether a collective interruption condition, which is one of the interruption conditions, is satisfied based on a current value flowing through at least one of the branch paths, and for switching each of the interrupters provided in the plurality of branch paths to the interrupted state when it is determined that the collective interruption condition is satisfied. An in-vehicle power supply device according to [1].

[0014] The first control is a control assuming a configuration in which the multiple downstream conductors are not electrically connected to each other by the conductive member, and can individually cut off the branch paths for which the individual cut-off condition is satisfied. The second control is a control assuming a configuration in which the multiple downstream conductors are electrically connected to each other by the conductive member, and can collectively cut off the multiple branch paths when an abnormality occurs. In other words, the above-mentioned vehicle-mounted power supply device can selectively execute controls corresponding to a configuration in which the multiple downstream conductors are electrically connected to each other by the conductive member and a configuration in which they are not electrically connected to each other.

[0015] [3] When a signal instructing which of the first control and the second control to execute is received from an external device, the control unit executes the control instructed by the signal. An in-vehicle power supply device according to [2].

[0016] According to this configuration, by providing a signal to the control unit from the outside, it is possible to instruct the control unit to perform the control.

[0017] [4] A determination unit is provided that determines whether the downstream conductors are in a conductive state through the conductive member, The control unit executes the first control when the determination unit determines that the conductive state is not established, and executes the second control when the determination unit determines that the conductive state is established. An in-vehicle power supply device according to [2].

[0018] The above-described vehicle-mounted power supply device can automatically select and execute appropriate control depending on whether or not the device is in a conductive state.

[0019] [5] In each of the branch paths, a switch unit is provided between the upstream conductor and the downstream conductor, When a determination start condition is satisfied, the determination unit controls the switch unit provided in some of the branch paths among the plurality of branch paths to an on state and controls the switch unit provided in the other branch paths to an off state, and acquires a current value flowing through at least one of the some of the branch paths, and determines whether or not the conduction state is established based on the acquired current value. An on-vehicle power supply device according to [4].

[0020] The above-described vehicle-mounted power supply device can determine whether or not the device is in a conductive state with a simple configuration.

[0021] [6] The individual interruption condition is a condition that is satisfied when a value of a current flowing through the branch path exceeds a first threshold value, The collective interruption condition is a condition that is satisfied when a value obtained by multiplying a current value flowing through one of the branch paths by a predetermined multiplication value exceeds a second threshold value that is greater than the first threshold value. An in-vehicle power supply device according to any one of [2] to [5].

[0022] The above-described vehicle-mounted power supply device can determine whether or not a collective cutoff condition is met based on the value of a current flowing through one of the branch paths.

[0023] [7] At least one electronic component including the interrupter is provided between the upstream conductor and the downstream conductor, The downstream conductor is provided with a load side connection portion for connecting a load, The connection portion is disposed between the at least one electronic component and the load-side connection portion and closer to the load-side connection portion. An in-vehicle power supply device according to any one of [1] to [6].

[0024] The above-described on-vehicle power supply device can prevent the currents joined via the conductive member from flowing to an electronic component provided between the upstream conductor and the downstream conductor.

[0025] [8] The plurality of downstream conductors include two parallel downstream conductors arranged in parallel to each other; the connection portion is provided on one surface of each of the parallel downstream conductors in an orthogonal direction that is orthogonal to a direction in which the two parallel downstream conductors extend and is orthogonal to a direction in which the two parallel downstream conductors are arranged, The connection portions provided on the respective parallel downstream conductors are arranged so as to approach each other in a direction in which the two parallel downstream conductors are arranged. An in-vehicle power supply device according to any one of [1] to [7].

[0026] In the above-mentioned vehicle-mounted power supply device, the connection parts of the parallel downstream conductors are all provided on one surface in the orthogonal direction, making it easy to connect the conductive members. Moreover, the connection parts are arranged closer to each other in the direction in which the two parallel downstream conductors are arranged, making it easy to shorten the length of the conductive members.

[0027] [9] The interrupters provided in each of the branch paths are composed of elements having the same model number. An in-vehicle power supply device according to any one of [1] to [8].

[0028] The above-described vehicle-mounted power supply device can easily ensure uniformity in the interrupting performance of the interrupter in each branch path.

[0029]

[10] A method for manufacturing a power supply device according to the present invention includes a preparation step of preparing an apparatus body including a common path to which power is supplied from a power supply unit, a plurality of branch paths branched from the common path, and a circuit breaker provided in each of the branch paths, Each of the branch paths has an upstream conductor and a downstream conductor provided on an opposite side of the upstream conductor from the common path side, each of the interrupting units is provided between the upstream conductor and the downstream conductor, and when an interrupting condition is satisfied, the interrupting unit switches from a permissive state in which a current flows from the upstream conductor side to the downstream conductor side to a blocking state in which the current flows, Further, a selection step of selecting whether or not to connect the downstream conductors of the plurality of branch paths by a conductive member is included, The selection result from the selection step is applied to the device main body to configure an in-vehicle power supply device. A method for manufacturing an in-vehicle power supply device.

[0030] In the selection process, when it is selected not to connect the multiple downstream conductors by a conductive member, the multiple branch paths can be configured as separate paths. In addition, in the selection process, when it is selected to connect the multiple downstream conductors by a conductive member, a path can be configured in which currents supplied from a common path to the multiple branch paths join at the downstream conductor. In other words, with this configuration, it is possible to realize a power supply device that can be used for both a vehicle equipped with multiple first loads and a vehicle equipped with a second load having a rated current higher than that of the first loads, while suppressing an increase in size.

[0031] First Embodiment 1. Configuration of in-vehicle power supply device 10 An on-vehicle power supply device 10 (hereinafter also simply referred to as "power supply device 10") shown in Fig. 1 is attached to a vehicle (not shown). A power supply unit 90 is mounted on the vehicle. The power supply unit 90 is, for example, a DC power supply such as a battery. The negative terminal of the battery is electrically connected to the ground.

[0032] It is assumed that the power supply device 10 is installed in a plurality of types of vehicles having different rated currents of loads. A plurality of types of vehicles means vehicles having at least one load having a different rated current due to differences in model, grade, destination, options, etc.

[0033] The power supply device 10 is configured as, for example, a junction box, an electric connection box, etc. The power supply device 10 includes a housing 11, a common path 12, a first branch path 20, and a second branch path 40.

[0034] The common path 12 is, for example, configured by a bus bar and has a plate shape. At least a portion of the common path 12 is disposed inside the housing 11. The common path 12 is electrically connected to a power supply unit 90 (more specifically, a positive terminal of a battery). Power is supplied to the common path 12 from the power supply unit 90.

[0035] The first branch path 20 is a path branched off from the common path 12. The first branch path 20 is a path through which a current of 10 A is assumed to flow. A plurality of first branch paths 20 (two in this embodiment) are provided. The plurality of first branch paths 20 are arranged in parallel to each other. Each of the first branch paths 20 has a first upstream conductor 21 and a first downstream conductor 22.

[0036] The first upstream conductor 21 is electrically connected to the common path 12 in a state in which it is short-circuited to the common path 12. The first upstream conductor 21 is, for example, configured of a bus bar and has a plate shape. One end side of the first upstream conductor 21 is fixed to the common path 12. The fixing method is not particularly limited, and may be, for example, soldering, welding, or co-fastening with a bolt.

[0037] The first downstream conductor 22 is provided on the opposite side (downstream side) of the common path 12 side from the first upstream conductor 21. The first downstream conductor 22 is, for example, a bus bar and has a plate shape. The first downstream conductor 22 is long along the direction in which the current flows. The first downstream conductor 22 is provided with a first load side connection portion 23 for connecting the load 91. In this embodiment, the first load side connection portion 23 is described as having a configuration in which a first insertion hole 24 for inserting a bolt (for example, a stud bolt) is formed, but may have another configuration. For example, the first load side connection portion 23 may be configured to have a mounting surface for surface mounting a wiring portion on the load 91 side. The first load side connection portion 23 is electrically connected to the load 91 using a bolt. The bolt inserted into the first insertion hole 24 of the first load side connection portion 23 functions as a part of the power supply path to the load 91. Of the multiple first insertion holes 24, one first insertion hole 24 (more specifically, first insertion hole 24A) has an inner diameter corresponding to 20 A or less, and the other first insertion holes 24 (more specifically, first insertion hole 24B) have an inner diameter corresponding to 10 A or less. For this reason, the inner diameter of the one first insertion hole 24 (more specifically, first insertion hole 24A) is larger than the inner diameter of the other first insertion hole 24 (more specifically, first insertion hole 24B).

[0038] The load 91 includes a first load 92 and a second load 93 having a rated current greater than that of the first load 92. The rated current of the first load 92 is, for example, 10 A, and the rated current of the second load 93 is, for example, 20 A. In other words, the rated current of the second load 93 is an integer multiple (more specifically, twice) of the rated current of the first load 92. The first load 92 is, for example, a heater or chiller for use in regions other than cold regions. The second load 93 is, for example, a heater for use in cold regions.

[0039] The power supply device 10 includes a plurality of first cutoff units 25. The first cutoff units 25 are provided in each of the first branch paths 20. The first cutoff units 25 are provided between the first upstream conductor 21 and the first downstream conductor 22, and when a cutoff condition is satisfied, the first cutoff units 25 are switched from a first permissive state that allows a current to flow from the first upstream conductor 21 side to the first downstream conductor 22 side to a first cutoff state that cuts off the current. The first cutoff units 25 provided in each of the first branch paths 20 are made up of elements having the same model number. With this configuration, the power supply device 10 can easily equalize the cutoff performance of the first cutoff units 25 in each of the first branch paths 20. In this embodiment, the first cutoff units 25 are configured to include a switching element, more specifically, a semiconductor switching element. The configuration including the semiconductor switching element may be a configuration including only the semiconductor switching element, or may be a configuration including a protection circuit or the like (for example, an IPD (Intelligent Power Device)). The semiconductor switching element may be, for example, a MOSFET (Metal-Oxide-Semiconductor Field Effect Transistor). The first interrupter 25 is joined to the first upstream conductor 21 and the first downstream conductor 22. The first interrupter 25 also functions as a switch. When the semiconductor switching element is in an on state, the first interrupter 25 is in a permissive state, and the first upstream conductor 21 and the first downstream conductor 22 are electrically connected. When the semiconductor switching element is in an off state, the first interrupter 25 is in a cut-off state, and the first upstream conductor 21 and the first downstream conductor 22 are not electrically connected. That is, the first interrupter 25 switches between a permissive state and a cut-off state.

[0040] The first downstream conductors 22 are configured to be mutually conductive via a conductive member 80 (see FIG. 3). Each of the first downstream conductors 22 is provided with a connection portion 26 connected to the conductive member 80. The bus bar constituting the first downstream conductor 22 is configured with a conductive base material 30 and an insulating layer 31 covering a part of the base material. The connection portion 26 is configured with an exposed surface of the base material 30 that is not covered by the insulating layer 31 and is exposed. The connection portion 26 is disposed between the first interrupter 25 and the first load side connection portion 23, and is disposed closer to the first load side connection portion 23. With this configuration, the power supply device 10 can prevent the currents joined via the conductive member 80 from flowing to the first interrupter 25 provided between the first upstream conductor 21 and the first downstream conductor 22.

[0041] The above-mentioned first downstream conductors 22 include two parallel downstream conductors 22A, 22B arranged in parallel to each other. The two parallel downstream conductors 22A, 22B are arranged in a direction perpendicular to the thickness direction. The connection portion 26 is provided on one surface of the parallel downstream conductors 22A, 22B in the orthogonal direction (thickness direction of the first downstream conductor 22) perpendicular to the extension direction of the parallel downstream conductors 22A, 22B and perpendicular to the direction in which the parallel downstream conductors 22A, 22B are arranged. The connection portions 26 provided on each of the parallel downstream conductors 22A, 22B are arranged so as to approach each other in the direction in which the parallel downstream conductors 22A, 22B are arranged. That is, in the direction in which the parallel downstream conductors 22A, 22B are arranged, the connection portion 26 provided on the parallel downstream conductor 22A on one side is arranged closer to the other side, and the connection portion 26 provided on the parallel downstream conductor 22B on the other side is arranged closer to one side. In the power supply device 10, the connection parts 26 of the parallel downstream conductors 22A, 22B are both provided on one surface in the orthogonal direction, making it easy to connect the conductive member 80. Moreover, the connection parts 26 are arranged closer to each other in the direction in which the parallel downstream conductors 22A, 22B are arranged. Therefore, in the power supply device 10, the length of the conductive member 80 can be easily shortened.

[0042] Furthermore, the connection portion 26 provided in the parallel downstream conductor 22A on one side is provided at the other end of the parallel downstream conductor 22A. The connection portion 26 provided in the parallel downstream conductor 22B on the other side is provided at one end of the parallel downstream conductor 22B. This makes it easier to further shorten the length of the conductive member 80 in the power supply device 10.

[0043] The conductive member 80 is conductive and has, for example, a rod shape. The conductive member 80 is connected to the connection portions 26 of the multiple first downstream side conductors 22 and is disposed across the multiple first downstream side conductors 22. The conductive member 80 makes the multiple first downstream side conductors 22 conductive to each other. The conductive member 80 shorts the first downstream side conductors 22 to each other.

[0044] When the plurality of first branch paths 20 are not connected by the conductive member 80, the power supply device 10 configures the plurality of first branch paths 20 as separate paths. Moreover, by connecting the plurality of first branch paths 20 by the conductive member 80, the power supply device 10 configures a path in which the currents supplied from the common path 12 to the plurality of first branch paths 20 join at the first downstream conductor 22. In other words, according to this configuration, it is possible to realize the power supply device 10 that can accommodate both a vehicle equipped with a plurality of first loads 92 and a vehicle equipped with a second load 93 having a rated current higher than that of the first load 92, while suppressing an increase in size.

[0045] The power supply device 10 includes a plurality of first current detection units 32. The first current detection units 32 are provided in the respective first branch paths 20 and detect a current value flowing through the first branch paths 20. The first current detection units 32 are provided on the common path 12 side (more specifically, the first upstream conductor 21) of the connection unit 26 in the first branch path 20 and detect a current value flowing through the common path 12 side (more specifically, the first upstream conductor 21) of the connection unit 26 in the first branch path 20. The first current detection units 32 output a signal capable of identifying a current value flowing through the first branch path 20. The first current detection units 32 include, for example, a known current sensor (in this embodiment, a Hall element).

[0046] The second branch path 40 is a path branched off from the common path 12. The second branch path 40 has a second upstream conductor 41 and a second downstream conductor 42. The second branch path 40 is a path through which a current larger than that of the first branch path 20 can flow. In this embodiment, the second branch path 40 is a path through which a current of 20 A is assumed to flow.

[0047] The second upstream conductor 41 is electrically connected to the common path 12 in a state in which it is short-circuited to the common path 12. The second upstream conductor 41 is, for example, configured by a bus bar and has a plate shape. One end of the second upstream conductor 41 is fixed to the common path 12. The fixing method is not particularly limited, and may be, for example, soldering, welding, or co-fastening with a bolt. The above-mentioned first upstream conductor 21 has a smaller cross section (cross section cut in a direction perpendicular to the direction in which the current flows) than the second upstream conductor 41.

[0048] The second downstream conductor 42 is provided on the opposite side (downstream side) of the common path 12 side from the second upstream conductor 41. The second downstream conductor 42 is, for example, a bus bar and has a plate shape. The second downstream conductor 42 is long along the direction in which the current flows. The second downstream conductor 42 is provided with a second load side connection portion 43 for connecting a load 91 (more specifically, a second load 93). In the present embodiment, the second load side connection portion 43 is described as having a configuration in which a second insertion hole 44 for inserting a bolt (for example, a stud bolt) is formed, but may have another configuration. For example, the second load side connection portion 43 may be configured to have a mounting surface for surface mounting a wiring portion on the load 91 side. The second load side connection portion 43 is electrically connected to the load 91 using a bolt. The bolt inserted into the second insertion hole 44 of the second load side connection portion 43 functions as a part of the power supply path to the load 91. The second insertion hole 44 has an inner diameter corresponding to 20A or less. That is, the inner diameter of the second insertion hole 44 is the same as the inner diameter of the first insertion hole 24A. Note that the "same inner diameter" does not necessarily mean the exact same inner diameter, but also includes substantially the same inner diameter. Substantially the same inner diameter means that the ratio of the difference between the inner diameter of the second insertion hole 44 and the inner diameter of the first insertion hole 24A to the larger inner diameter is within 5%.

[0049] The power supply device 10 includes a second cutoff unit 45. The second cutoff unit 45 is provided in the second branch path 40. The second cutoff unit 45 is provided between the second upstream conductor 41 and the second downstream conductor 42, and when a second cutoff condition is satisfied, the second cutoff unit 45 switches from a second permissive state that allows a current to flow from the second upstream conductor 41 side to the second downstream conductor 42 side to a second cutoff state that cuts off the current. In this embodiment, the second cutoff unit 45 includes a switching element, more specifically, a semiconductor switching element. The semiconductor switching element may include only a semiconductor switching element, or may include a protection circuit or the like (for example, an IPD (Intelligent Power Device)). The semiconductor switching element may be, for example, a Metal-Oxide-Semiconductor Field Effect Transistor (MOSFET). The second cutoff unit 45 is joined to the second upstream conductor 41 and the second downstream conductor 42. The second cutoff unit 45 also functions as a second switch unit. The second cutoff unit 45 is in the second permissive state when the semiconductor switching element is in the on state, and conducts electricity between the second upstream conductor 41 and the second downstream conductor 42. In addition, the second cutoff unit 45 is in the second cutoff state when the semiconductor switching element is in the off state, and does not conduct electricity between the second upstream conductor 41 and the second downstream conductor 42. In other words, the second cutoff unit 45 switches between the second permissive state and the second cutoff state.

[0050] The power supply device 10 includes a second current detection unit 52. The second current detection unit 52 is provided in the second branch path 40 and detects the value of a current flowing through the second branch path 40. The second current detection unit 52 outputs a signal that can identify the value of a current flowing through the second branch path 40. The second current detection unit 52 includes, for example, a known current sensor (in this embodiment, a Hall element).

[0051] The power supply device 10 includes a control unit 50 that controls the first cutoff unit 25 and the second cutoff unit 45. The control unit 50 includes, for example, an MCU (Micro Controller Unit), a driving circuit for switching elements, and the like. The control unit 50 receives signals output from the first current detection units 32 and acquires the current values ​​flowing through the first branch paths 20. The control unit 50 receives signals output from the second current detection units 52 and acquires the current values ​​flowing through the second branch paths 40.

[0052] The control unit 50 can selectively execute a first control and a second control. The first control is a control assuming a configuration in which the multiple first downstream conductors 22 are not electrically connected to each other by the conductive member 80. The first control is a control for determining whether or not an individual interruption condition, which is one of the first interruption conditions, is satisfied for each of the first branch paths 20 based on the value of the current flowing through each of the first branch paths 20, and for switching the first interruption unit 25 provided in the first branch path 20 for which it is determined that the individual interruption condition is satisfied, to the first interruption state.

[0053] The second control is control assuming a configuration in which the multiple first downstream conductors 22 are conductive to each other by the conductive member 80. The second control is control for determining whether or not a collective cutoff condition, which is one of the first cutoff conditions, is satisfied based on a current value flowing through at least one first branch path 20, and for switching each of the first cutoff units 25 provided in the multiple first branch paths 20 to the first cutoff state when it is determined that the collective cutoff condition is satisfied. With this configuration, the power supply device 10 can selectively execute control corresponding to a configuration in which the multiple first downstream conductors 22 are conductive to each other by the conductive member 80 and a configuration in which they are not conductive to each other.

[0054] When a signal instructing which of the first control and the second control to execute is given from the outside, the control unit 50 executes the control instructed by the signal. According to this configuration, by giving a signal to the control unit 50 from the outside, it is possible to instruct the control unit 50 on the control to be executed by the control unit 50. The instruction from the outside is basically given before the power supply device 10 is mounted on the vehicle.

[0055] The control unit 50 determines whether or not the second interruption condition is satisfied based on the current value flowing through the second branch path 40, and switches the second interruption unit 45 provided in the second branch path 40 for which it is determined that the second interruption condition is satisfied to the second interruption state.

[0056] The individual interruption condition is a condition that is satisfied when the current value flowing through the first branch path 20 exceeds a first threshold. The individual interruption condition may be a condition that is satisfied immediately when the current value flowing through the first branch path 20 exceeds the first threshold, or may be a condition that is satisfied when the state in which the current value flowing through the first branch path 20 exceeds the first threshold continues for a first predetermined time. The first predetermined time may change depending on the degree to which the current value flowing through the first branch path 20 exceeds the first threshold. For example, the first predetermined time may be shorter as the degree to which the current value flowing through the first branch path 20 exceeds the first threshold increases. The individual interruption condition may be a condition that is satisfied based on first correspondence data indicating a correspondence relationship between a plurality of current values ​​and a first predetermined time corresponding to each current value, and the current value flowing through the first branch path 20. The control unit 50 may start judging whether or not the first predetermined time corresponding to the current value has elapsed each time the current value indicated in the first correspondence data is exceeded, and may switch the first interruption unit 25 to the first interruption state when it is judged that any of the first predetermined times has elapsed. The first corresponding data may be function data or table data.

[0057] The collective cutoff condition is a condition that is satisfied when a value obtained by multiplying a current value flowing through one of the first branch paths 20 by a predetermined multiplication value (2 in this embodiment) exceeds a second threshold value that is greater than the first threshold value. With this configuration, the power supply device 10 can determine whether the collective cutoff condition is satisfied based on the current value flowing through one of the first branch paths 20. The multiplication value is a value greater than 1. The multiplication value is the number of the first branch paths 20, and more specifically, the number of the first branch paths 20 that can be made conductive through the conductive member 80. The collective cutoff condition may be a condition that is satisfied immediately when a value obtained by multiplying a current value flowing through one of the first branch paths 20 by a predetermined multiplication value exceeds a second threshold value, or may be a condition that is satisfied when the state in which the second threshold value is exceeded continues for a second predetermined time. The second predetermined time may change depending on the degree to which the value obtained by multiplying a current value flowing through one of the first branch paths 20 by a predetermined multiplication value exceeds the second threshold value. For example, the second predetermined time may be shorter as the degree to which the value obtained by multiplying the current value flowing through one of the first branch paths 20 by a predetermined multiplication value increases. The collective individual interruption condition may be a condition that is established based on second correspondence data indicating a correspondence relationship between a plurality of current values ​​and the second predetermined time corresponding to each current value, and a value obtained by multiplying the current value flowing through one of the first branch paths 20 by a predetermined multiplication value. Each time the current value exceeds each current value indicated in the second correspondence data, the control unit 50 may start judging whether the second predetermined time corresponding to the current value has elapsed, and may switch each of the first interruption units 25 to the first interruption state when it is judged that any of the second predetermined times has elapsed. The first correspondence data may be function data or table data.

[0058] The second cutoff condition is a condition that is satisfied when the current value flowing through the second branch path 40 exceeds the second threshold. The second cutoff condition may be a condition that is satisfied immediately when the current value flowing through the second branch path 40 exceeds the second threshold, or may be a condition that is satisfied when the state in which the current value flowing through the second branch path 40 exceeds the second threshold continues for a second predetermined time. The second predetermined time may change depending on the degree to which the current value flowing through the second branch path 40 exceeds the second threshold. For example, the second predetermined time may be shorter as the degree to which the current value flowing through the second branch path 40 exceeds the second threshold increases. The second cutoff condition may be a condition that is satisfied based on the above-mentioned second correspondence data and the current value flowing through the second branch path 40. The control unit 50 may start judging whether or not the second predetermined time corresponding to the current value has elapsed each time the current value indicated in the second correspondence data is exceeded, and may switch the second cutoff unit 45 to the second cutoff state when it is judged that any of the second predetermined times has elapsed.

[0059] According to this configuration, the power supply device 10 can share the second threshold value between the collective cutoff condition and the second cutoff condition. Also, the power supply device 10 can share the second correspondence data between the collective cutoff condition and the second cutoff condition.

[0060] 2. Operation of the Power Supply Device 10 The control unit 50 of the power supply device 10 performs either the first control or the second control, whichever is instructed from outside the power supply device 10.

[0061] When the first control is instructed, the control unit 50 operates as follows. As shown in FIG. 2, the power supply device 10 is assumed to have a configuration in which a first load 92 is connected to each of the first branch paths 20 and a load 91 is not connected to the second branch path 40. When a start condition is satisfied, the control unit 50 starts monitoring the current value flowing through each of the first branch paths 20. The start condition is, for example, that a start switch (e.g., an ignition switch, a power switch, etc.) of the vehicle is switched from an off state to an on state. In this case, when a permissive condition is satisfied for any of the first branch paths 20, the control unit 50 switches the first cutoff unit 25 provided in the first branch path 20 in which the permissive condition is satisfied to a first permissive state, and supplies power to the first load 92. The permissive condition is, for example, that a permissive operation is performed by the user. The second cutoff unit 45 is maintained in the second cutoff state. The control unit 50 determines whether or not the individual interruption condition is satisfied for each of the first branch paths 20 based on the value of the current flowing through each of the first branch paths 20. When the control unit 50 determines that the individual interruption condition is not satisfied for any of the first branch paths 20, the control unit 50 repeats the determination of whether or not the individual interruption condition is satisfied for each of the first branch paths 20 based on the value of the current flowing through each of the first branch paths 20. When the control unit 50 determines that the individual interruption condition is satisfied, the control unit 50 switches the first interruption unit 25 provided in the first branch path 20 for which it has been determined that the individual interruption condition is satisfied to the first interruption state.

[0062] When the second control is instructed, the control unit 50 operates as follows. As shown in FIG. 3, the power supply device 10 is assumed to have a configuration in which the second load 93 is connected to one of the first branches 20, and the load 91 is not connected to the other first branches 20 and the second branch 40. When the above-mentioned start condition is satisfied, the control unit 50 starts monitoring the current value flowing through one of the first branches 20. When the permissible condition is satisfied for the first branch 20, the control unit 50 switches the first interrupting unit 25 provided in each of the first branches 20 to the first permissive state, and supplies power to the second load 93. The second interrupting unit 45 is maintained in the second interrupting state. The control unit 50 determines whether the collective interruption condition is satisfied based on the current value flowing through one of the first branches 20. When the control unit 50 determines that the collective interruption condition is not satisfied, it repeats the determination of whether the collective interruption condition is satisfied based on the current value flowing through one of the first branches 20. When the control unit 50 determines that the collective interruption condition is met, it switches the first interrupting units 25 provided in the respective first branch paths 20 to the first interruption state.

[0063] In addition, in a configuration in which the second load 93 is connected to the second branch path 40, the control unit 50 further starts monitoring the value of the current flowing through the second branch path 40. Then, the control unit 50 determines whether or not the second cut-off condition is satisfied based on the value of the current flowing through the second branch path 40. If the control unit 50 determines that the second cut-off condition is not satisfied, it repeats the determination of whether or not the second cut-off condition is satisfied based on the value of the current flowing through the second branch path 40. If the control unit 50 determines that the second cut-off condition is satisfied, it switches the second cut-off unit 45 provided in the second branch path 40 to the second cut-off state.

[0064] 3. Method for manufacturing the power supply device 10 The method of manufacturing the power supply device 10 includes a preparation step and a selection step.

[0065] In the preparation step, the device main body 10A is prepared. The device main body 10A includes a common path 12 to which power is supplied from a power supply unit 90, a plurality of first branch paths 20 branched from the common path 12, and a first cutoff unit 25 provided in each of the first branch paths 20. Each of the first branch paths 20 includes a first upstream conductor 21 and a first downstream conductor 22 provided on the opposite side of the first upstream conductor 21 from the common path 12 side. Each of the first cutoff units 25 is provided between the first upstream conductor 21 and the first downstream conductor 22, and switches from a first permissive state that allows a current to flow from the first upstream conductor 21 side to the first downstream conductor 22 side to a first cutoff state that cuts off the current when a first cutoff condition is satisfied.

[0066] In the selection step, it is selected whether or not the first downstream conductors 22 of the multiple first branch paths 20 are connected by the conductive members 80. Then, the power supply device 10 is configured by applying the selection result in the selection step to the device main body 10A.

[0067] In the selection process, when it is selected not to connect the plurality of first downstream conductors 22 by the conductive member 80, the plurality of first branch paths 20 can be configured as separate paths. In addition, in the selection process, when it is selected to connect the plurality of first downstream conductors 22 by the conductive member 80, a path can be configured in which the currents supplied from the common path 12 to the plurality of first branch paths 20 join at the first downstream conductor 22. In other words, according to this configuration, it is possible to realize a power supply device 10 that can accommodate both a vehicle equipped with a plurality of first loads 92 and a vehicle equipped with a second load 93 having a rated current higher than that of the first load 92, while suppressing an increase in size.

[0068] <Second embodiment> The in-vehicle power supply device 10 of the first embodiment is configured to select and execute either the first control or the second control in response to an external instruction. In contrast, in the second embodiment, a configuration in which the in-vehicle power supply device 210 itself determines which control to execute will be described. In the description of the second embodiment, the same reference numerals are used for the same components as in the first embodiment, and detailed description thereof will be omitted.

[0069] An in-vehicle power supply device 210 (hereinafter also simply referred to as "power supply device 210") of the second embodiment differs from the power supply device 10 of the first embodiment mainly in that it includes a control unit 250, as shown in Fig. 4. A device main body 210A shown in Fig. 4 differs from the device main body 10A of the first embodiment mainly in that it includes a control unit 250. The control unit 250 differs from the control unit 50 of the first embodiment mainly in that it includes a determination unit 251.

[0070] The determination unit 251 determines whether or not the plurality of first downstream conductors 22 are in a conductive state in which they are made conductive by the conductive member 80 (see FIG. 3). More specifically, when a determination start condition is satisfied, the determination unit 251 acquires a current value flowing through at least one of the partial first branch paths 20 in a state in which the first interrupting units 25 provided in some of the plurality of first branch paths 20 are controlled to a first permissive state and the first interrupting units 25 provided in the other first branch paths 20 are controlled to a first interrupted state (i.e., in a state in which the switch units provided in some of the first branch paths 20 are controlled to an on state and the switch units provided in the other first branch paths 20 are controlled to an off state), and determines whether or not the plurality of first downstream conductors 22 are in a conductive state based on the acquired current value.

[0071] In this embodiment, when the judgment start condition is satisfied, the first interrupter 25 provided in one of the two first branch paths 20 is controlled to the first permissive state, and the first interrupter 25 provided in the other first branch path 20 is controlled to the first interrupted state (i.e., the switch unit provided in one of the first branch paths 20 is controlled to the on state, and the switch unit provided in the other first branch path 20 is controlled to the off state), the current value flowing through the one of the first branch paths 20 is acquired, and it is judged whether or not the conduction state is established based on the acquired current value. With this configuration, the power supply device 210 can judge whether or not the conduction state is established with a simple configuration.

[0072] The judgment unit 251, for example, judges whether the acquired current value exceeds a judgment threshold (e.g., 15 A) or not, and if it determines that the judgment threshold is not exceeded, it judges that the conductive state is not present, and if it determines that the judgment threshold is exceeded, it judges that the conductive state is present.

[0073] The judgment start condition may be, for example, that the control unit 250 is started for the first time after the power supply device 210 is mounted on the vehicle, or that the start switch of the vehicle is switched to the on state.

[0074] The control unit 250 selects and executes the first control when the determination unit 251 determines that the electrical continuity is not established, and selects and executes the second control when the determination unit 251 determines that the electrical continuity is established.

[0075] According to this configuration, the power supply device 210 can automatically select and execute appropriate control depending on whether or not the power supply device 210 is in a conductive state.

[0076] <Third embodiment> In the first embodiment, the second control is configured to individually control each of the first interrupting units 25. In contrast, in the third embodiment, a configuration in which the second control is configured to collectively control each of the first interrupting units 25 will be described. In the description of the third embodiment, the same reference numerals are used for the same configuration as in the first embodiment, and detailed description thereof will be omitted.

[0077] As shown in FIG. 5, a vehicle-mounted power supply device 310 (hereinafter also simply referred to as “power supply device 310”) of the third embodiment includes a first signal line 360, a changeover switch unit 361, a second signal line 362, and a control unit 350.

[0078] The first signal lines 360 are provided corresponding to the respective first cutoff units 25. Each first signal line 360 ​​provides a control signal (e.g., an on / off signal) output from the control unit 350 to the corresponding first cutoff unit 25.

[0079] The changeover switch unit 361 is provided between the first signal lines 360, and when in an on state, causes the first signal lines 360 to be conductive with each other, and when in an off state, causes the first signal lines 360 to be non-conductive with each other. The changeover switch unit 361 is configured to include a switching element, more specifically, a semiconductor switching element. The configuration including the semiconductor switching element may be a configuration including only the semiconductor switching element, or may be a configuration including a protection circuit and the like (for example, an IPD (Intelligent Power Device)). The semiconductor switching element may be, for example, a MOSFET (Metal-Oxide-Semiconductor Field Effect Transistor).

[0080] The second signal line 362 supplies a control signal (for example, an on / off signal) output from the control unit 350 to the changeover switch unit 361.

[0081] The control unit 350 differs from the control unit 50 of the first embodiment in that it mainly controls the changeover switch unit 361. The control unit 350 provides a control signal to the first cutoff unit 25 via each first signal line 360. The control unit 350 can control the changeover switch unit 361 by providing a control signal to the changeover switch unit 361 via a second signal line 362.

[0082] In the first control described in the first embodiment, the control unit 350 controls the changeover switch unit 361 to the off state. When the changeover switch unit 361 is in the off state, the control unit 350 can individually control each of the first cutoff units 25 (switch units) via each of the first signal lines 360. In addition, in the second control described in the first embodiment, the control unit 350 controls the changeover switch unit 361 to the on state. When the changeover switch unit 361 is in the on state, the control unit 350 can collectively control the multiple first cutoff units 25 (switch units) via any of the first signal lines 360. In other words, the control unit 350 can collectively control the multiple first cutoff units 25 (switch units) by outputting a control signal to any of the multiple first signal lines 360 and thereby collectively providing the control signal to the multiple first cutoff units 25 (switch units).

[0083] <Other embodiments> The present disclosure is not limited to the embodiments described above and in the drawings. For example, the features of the above or later described embodiments can be combined in any combination within a range that does not contradict. In addition, any feature of the above or later described embodiments can be omitted unless it is clearly stated as essential. Furthermore, the above-mentioned embodiment may be modified as follows.

[0084] In each of the above embodiments, the power supply device 10 is configured to include the second branch path 40. However, the power supply device 10 may be configured not to include the second branch path 40.

[0085] In each of the above embodiments, the first interrupting unit 25 functions as a switch unit, but it may be configured such that it cannot return to the first permissive state after switching to the first interrupting state. For example, the first interrupting unit 25 may be a mechanical fuse that melts when the temperature exceeds a threshold temperature, or may be a pyrotechnic circuit breaker (e.g., a pyro fuse) that physically cuts off the first branch path 20 when a cutoff signal is input. The same applies to the second interrupting unit 45.

[0086] In each of the above embodiments, the switch unit is configured by the first interrupter 25, but may be configured to be provided separately from the first interrupter 25. In this case, for example, the first interrupter 25 and the switch unit may be configured to be provided in series between the first upstream conductor 21 and the first downstream conductor 22. In each of the above embodiments, the second switch unit is configured by the second interrupter 45, but may be configured to be provided separately from the second interrupter 45. In this case, for example, the second interrupter 45 and the second switch unit may be configured to be provided in series between the second upstream conductor 41 and the second downstream conductor 42.

[0087] In each of the above embodiments, two first branch paths 20 are configured to be electrically connected to each other by the conductive member 80, but three or more first branch paths 20 may be configured to be electrically connected to each other by the conductive member 80.

[0088] The configuration of the determination unit 251 is not limited to that of the second embodiment. For example, the determination unit 251 may be a determination circuit configured separately from the control unit 50.

[0089] It should be noted that the embodiments disclosed herein are illustrative and not restrictive in all respects. The scope of the present invention is not limited to the embodiments disclosed herein, and is intended to include all modifications within the scope indicated by the claims or within the scope equivalent to the claims. [Explanation of symbols]

[0090] 10…Power supply device 10A…Device body 11…Housing 12...Common Route 20…First fork (fork) 21...First upstream conductor (upstream conductor) 22...First downstream conductor (downstream conductor) 22A…Parallel downstream conductor 22B…Parallel downstream conductor 23...First load side connection part (load side connection part) 24…First insertion hole 24A…First insertion hole (insertion hole) 24B…First insertion hole 25…First interrupter (interrupter) 26…Connection 30...Base material 31...Insulating layer 32...First current detection section 40…Second fork 41…Second upstream conductor 42…Second downstream conductor 43…Second load side connection part 44…Second insertion hole 45…Second cutoff section 50...Control unit 52...Second current detection section 80...Conductive member 90...Power supply section 91...Load 92...1st load (load) 93…Second load 210…Power supply device 210A…Device body 250…Control unit 251…Judgment section 310…Power supply device 350...Control unit 360…First signal line 361…Changeover switch section 362…Second signal line

Claims

1. a common path to which power is supplied based on a power supply unit; A plurality of branch paths branched off from the common path; a cut-off portion provided in each of the branch paths, Each of the branch paths has an upstream conductor and a downstream conductor provided on an opposite side of the upstream conductor from the common path side, each of the interrupting units is provided between the upstream conductor and the downstream conductor, and when an interrupting condition is satisfied, the interrupting unit switches from a permissive state in which a current flows from the upstream conductor side to the downstream conductor side to a blocking state in which the current flows, The downstream conductors are configured to be electrically connected to each other via a conductive member, Each of the downstream conductors is provided with a connection portion that is connected to the conductive member. An in-vehicle power supply device.

2. A control unit that controls the interrupter, The control unit is capable of selectively executing a first control and a second control, the first control is a control for determining whether or not an individual interruption condition, which is one of the interruption conditions, is satisfied for each of the branch paths based on a current value flowing through each of the branch paths, and switching the interrupter provided in the branch path for which it is determined that the individual interruption condition is satisfied to the interruption state; The second control is a control for determining whether a collective interruption condition, which is one of the interruption conditions, is satisfied based on a current value flowing through at least one of the branch paths, and for switching each of the interrupters provided in the plurality of branch paths to the interrupted state when it is determined that the collective interruption condition is satisfied.

2. The vehicle-mounted power supply device according to claim 1.

3. When a signal instructing which of the first control and the second control to execute is received from an external device, the control unit executes the control instructed by the signal.

3. The vehicle-mounted power supply device according to claim 2.

4. a determination unit that determines whether the downstream conductors are in a conductive state in which the downstream conductors are conductive through the conductive member; The control unit executes the first control when the determination unit determines that the conductive state is not established, and executes the second control when the determination unit determines that the conductive state is established.

3. The vehicle-mounted power supply device according to claim 2.

5. a switch unit provided between the upstream conductor and the downstream conductor in each of the branch paths, When a determination start condition is satisfied, the determination unit controls the switch unit provided in some of the branch paths among the plurality of branch paths to an on state and controls the switch unit provided in the other branch paths to an off state, and acquires a current value flowing through at least one of the some of the branch paths, and determines whether or not the conduction state is established based on the acquired current value.

5. The vehicle-mounted power supply device according to claim 4.

6. the individual interruption condition is a condition that is satisfied when a value of a current flowing through the branch path exceeds a first threshold value, The collective interruption condition is a condition that is satisfied when a value obtained by multiplying a current value flowing through one of the branch paths by a predetermined multiplication value exceeds a second threshold value that is greater than the first threshold value. The power supply device for vehicle installation according to any one of claims 2 to 5.

7. at least one electronic component including the interrupter is provided between the upstream conductor and the downstream conductor; The downstream conductor is provided with a load side connection portion for connecting a load, The connection portion is disposed between the at least one electronic component and the load-side connection portion and closer to the load-side connection portion. The power supply device for vehicle installation according to any one of claims 1 to 4.

8. The plurality of downstream conductors include two parallel downstream conductors arranged side by side in parallel to each other, the connection portion is provided on one surface of each of the parallel downstream conductors in an orthogonal direction that is orthogonal to a direction in which the two parallel downstream conductors extend and is orthogonal to a direction in which the two parallel downstream conductors are arranged, The connection portions provided on the respective parallel downstream conductors are arranged so as to approach each other in a direction in which the two parallel downstream conductors are arranged. The power supply device for vehicle installation according to any one of claims 1 to 4.

9. The interrupters provided in each of the branch paths are composed of elements having the same model number. The power supply device for vehicle installation according to any one of claims 1 to 4.

10. A preparation step of preparing an apparatus body including a common path to which power is supplied from a power supply unit, a plurality of branch paths branched from the common path, and a breaker unit provided in each of the branch paths, Each of the branch paths has an upstream conductor and a downstream conductor provided on an opposite side of the upstream conductor from the common path side, each of the interrupting units is provided between the upstream conductor and the downstream conductor, and when an interrupting condition is satisfied, the interrupting unit switches from a permissive state in which a current flows from the upstream conductor side to the downstream conductor side to a blocking state in which the current flows, Further, a selection step of selecting whether or not to connect the downstream conductors of the plurality of branch paths by a conductive member is included, The selection result from the selection step is applied to the device main body to configure an in-vehicle power supply device. A method for manufacturing an in-vehicle power supply device.

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