JPWO2018151110A1 - Power supply circuit - Google Patents

Abstract

An object of the power supply circuit of the present invention is to prevent overvoltage to a switch element connected in series with a power supply while ensuring versatility of a power supply module. The power feeding circuit (1) includes a plurality of power supply modules (12) connected in series and supplies power to a load (20) included in the vehicle (30). Each of the plurality of power supply modules (12) includes a power supply (121) and a switch element (122). The power supply circuit (1) includes a plurality of diodes (14) connected in parallel one by one to each of the plurality of power supply modules (12). The diode (14) has a second connection that connects the diode (14) and the positive electrode of the power source (121) from the first connection point (132) that connects the diode (14) and the negative electrode of the power source (121). The current is allowed to flow toward the point (131), but the current is not allowed to flow from the second connection point (131) toward the first connection point (132).

Description

  The present invention relates to a power supply circuit that supplies electric power to a load provided in a vehicle.

In addition to a vehicle that uses only an engine as a drive source, there are a vehicle (electric vehicle) that uses only a motor as a drive source, and a vehicle that uses an engine and a motor as drive sources (hybrid vehicle).
A vehicle using a motor as a drive source such as an electric vehicle or a hybrid vehicle is provided with a power supply circuit that supplies electric power to a load such as a motor.

  The power supply circuit includes a power supply module. The power supply module includes a power supply (for example, a secondary battery) and a switch element connected in series to the power supply. The withstand voltage of the switch element is set in consideration of the voltage applied to the load by the power feeding circuit.

  In order to increase the voltage applied to the load by the power supply circuit, the power supply circuit may include a plurality of power supply modules connected in series. In this case, the withstand voltage required for the switch element included in each of the plurality of power supply modules is set in consideration of the voltage applied to the load by the power feeding circuit.

  Even if the type of vehicle is different, the same type of power supply module may be used. In that case, the number of power supply modules included in the power supply circuit may vary depending on the type of vehicle. Thereby, the output of a motor can be varied for every kind of vehicle. When the power source is a secondary battery, the maximum distance that can be traveled by one charge can be varied for each type of vehicle.

  When the number of power supply modules included in the power supply circuit varies depending on the type of vehicle, in order to increase the versatility of the power supply module, for example, a switch having a withstand voltage that is required when the number of power supply modules is the maximum. It is conceivable to use an element. In this case, when the number of power supply modules is smaller than the maximum number, a switching element having a withstand voltage higher than the minimum withstand voltage originally necessary may be used for the power supply circuit.

  Here, the higher the withstand voltage of the switch element, the higher the resistance of the switch element in the ON state. Therefore, the higher the withstand voltage of the switch element, the greater the amount of heat generated by the switch element during energization. Therefore, when a switch element having a withstand voltage sufficiently higher than the originally required withstand voltage is used, more heat countermeasures are required than when a switch element having a minimum withstand voltage that is originally required is used. Is required.

  In addition, when the switch element which has a withstand voltage which changes according to the number of power supply modules can be used, although the emitted-heat amount can be suppressed, the versatility of a power supply module falls.

  Japanese Patent Laying-Open No. 2015-91200 discloses a vehicle on which a plurality of battery packs (corresponding to the power supply modules described above) are detachably mounted. Each of the plurality of battery packs includes a secondary battery, a battery pack-side switch element, and a BMS (Battery Management System). The battery pack side switch element is a switch element that blocks output from the secondary battery to the outside. The battery pack side switch element is connected in series to the secondary battery. BMS controls charging / discharging of a secondary battery.

  In the above publication, an ECU (Engine Control Unit) and a vehicle-side switch element are provided in the vehicle. The ECU communicates with an information communication circuit included in the BMS. The vehicle-side switch element is controlled on / off by the ECU.

  In the above publication, the ECU turns on the vehicle-side switch element when the battery pack-side switch elements of all the battery packs (battery modules) are on. Accordingly, a switch element having a minimum withstand voltage can be used as the battery pack side switch element while preventing damage to the battery pack side switch element due to a potential difference between both ends of the battery side switch element.

Japanese Patent Laying-Open No. 2015-91200

  However, in the above publication, communication is required between the BMS and the ECU. Therefore, the versatility of the power module (battery pack) is low.

  The objective of this invention is providing the electric power feeding circuit which prevents the overvoltage to the switch element connected in series with respect to the power supply, ensuring the versatility of a power supply module.

  The inventor of the present application has studied a configuration that eliminates the need for communication between the power supply module and the vehicle in order to ensure versatility of the power supply module. Then, further studies were made focusing on the configuration of the power supply circuit itself. As a result, they have come to know that a diode arranged in parallel with the power supply module may be provided. The present invention has been completed based on such findings.

  (1) A power supply circuit according to the present invention is a power supply circuit that includes a plurality of power supply modules connected in series and supplies power to a load included in a vehicle. Each of the plurality of power supply modules includes a power supply for supplying power and a switch element connected in series to the power supply. The power supply circuit further includes a plurality of diodes connected in parallel one by one to each of the plurality of power supply modules. Each of the plurality of diodes allows a current to flow from a first connection point connecting the diode and the negative electrode of the power supply to a second connection point connecting the diode and the positive electrode of the power supply. However, it is configured not to allow current to flow from the second connection point toward the first connection point.

  In a power supply circuit including a plurality of switch elements, the timing at which the plurality of switch elements are turned on or off may be shifted due to some cause. The switch element may require a response time. Therefore, it is difficult to completely synchronize the on / off operations of a plurality of switch elements. As a result, the timing at which the plurality of switch elements are turned on or off may be shifted. In addition, when any of the plurality of switch elements fails (short-circuit), the timing at which the plurality of switch elements are turned on or off is shifted.

  Assume a case where only one of a plurality of switch elements is switched off for some reason. If the diode is not connected in parallel to the switch element, the potential difference between both ends of the switch element in the off state is larger than the output voltage of one power supply. The potential difference between both ends of the switch element in the off state may be substantially the same as the sum of the output voltages of the plurality of power supplies. Therefore, the switch element may be damaged due to a potential difference between both ends of the switch element in the off state. For this reason, when a diode is not provided, the switch element is required to have a high withstand voltage.

  On the other hand, the power supply circuit of the present invention includes a plurality of diodes connected in parallel one by one to each of the plurality of switch elements. Of the two connection points connecting the diode and the power supply module, a connection point connected to the negative electrode of the power supply is defined as a first connection point, and a connection point connected to the positive electrode of the power supply is defined as a second connection point. The diode allows current to flow from the first connection point toward the second connection point, but does not allow current to flow from the second connection point toward the first connection point. Therefore, when only one of the plurality of switch elements is turned off for some reason, a current flows through a diode connected in parallel with the switch element in the off state. Thereby, the potential difference between both ends of the switch element in the off state can be reduced to substantially the same level as the output voltage of one power source. Therefore, a switch element having the same withstand voltage can be used regardless of the number of power supply modules included in the power supply circuit. That is, overvoltage to the switch element can be prevented while ensuring the versatility of the power supply module.

  In addition, since the diode is connected not only in parallel to the switch element but also in parallel to the power supply, the withstand voltage required for the diode can be reduced.

  (2) According to another aspect, the power supply circuit of the present invention preferably has the following configuration. The switch element is an electrically controllable switch element.

  (3) According to another aspect, the power supply circuit of the present invention preferably has the following configuration. At least one power supply module among the plurality of power supply modules is detachable from the vehicle body of the vehicle.

  According to this configuration, since the power supply module can be attached to and detached from the vehicle body, the versatility of the power supply module can be improved.

  (4) According to another aspect, the power supply circuit of the present invention preferably has the following configuration. Each of at least one of the plurality of power supply modules can be attached to and detached from the vehicle body integrally with the diode connected in parallel to the power supply module.

According to this configuration, since the power supply module and the diode can be integrally attached to and detached from the vehicle body, the versatility of the power supply module can be further improved. Specifically, for example, it is assumed that there is a vehicle including a conventional power supply circuit that does not have a diode and in which a power supply module of the power supply circuit is detachably mounted. Instead of the conventional power supply module, a vehicle in which the power supply module and the diode are integrated can be mounted on this vehicle.
The “at least one power supply module” in the above (4) may be the same as the “at least one power supply module” in the above (3), and is one of the “at least one power supply module” in the above (3). Part.

  (5) According to another aspect, the power supply circuit of the present invention preferably has the following configuration. Each of at least two of the plurality of power supply modules can be attached to and detached from the vehicle body integrally with the diode connected in parallel to the power supply module. The at least two power supply modules can be individually attached to and detached from the vehicle body.

According to this configuration, since at least two power supply modules can be individually attached to and detached from the vehicle body, the plurality of power supply modules are not integrated. Therefore, the same power supply module can be used for vehicles having different numbers of power supply modules. Thus, the versatility of the power supply module can be further improved. Further, when any of the plurality of power supply modules fails, only the failed power supply module can be replaced.
The “at least two power supply modules” in the above (5) may be the same as the “at least one power supply module” in the above (4), and one of the “at least one power supply module” in the above (4). Part.

  (6) According to another aspect, the power supply circuit of the present invention preferably has the following configuration. Each of at least two of the plurality of power supply modules can be attached to and detached from the vehicle body integrally with the diode connected in parallel to the power supply module. The at least two power supply modules can be integrally attached to and detached from the vehicle body.

According to this configuration, since at least two power supply modules can be integrally attached to and detached from the vehicle main body, the power supply module is compared with a case where at least two power supply modules can be individually attached to and detached from the vehicle main body. It is possible to reduce the number of connection parts for attaching to and detaching from the vehicle body. Therefore, attachment / detachment can be performed more easily.
The “at least two power supply modules” in the above (6) may be the same as the “at least one power supply module” in the above (4), and one of the “at least one power supply module” in the above (4). Part.

  (7) According to another aspect, the power feeding circuit of the present invention preferably has the following configuration. At least one of the plurality of power supply modules is detachable from the vehicle body including the diode connected in parallel with the power supply module.

According to this configuration, when replacing the power supply module, the diode can be used as it is without being replaced.
Accordingly, the cost of the diode can be reduced. Further, since the detachable element does not include a diode, the detachable element can be reduced in size.
The “at least one power supply module” in the above (7) may be the same as the “at least one power supply module” in the above (3), and one of the “at least one power supply module” in the above (3). Part.

  (8) According to another aspect, the power supply circuit of the present invention preferably has the following configuration. At least one of the plurality of power supplies included in the plurality of power supply modules is detachable from the vehicle body of the vehicle. Each of at least one of the plurality of power supplies included in the plurality of power supply modules includes the switch element included in the power supply module including the power supply, and the diode connected in parallel with the power supply. It can be attached to and detached from the main body.

  According to this configuration, when the power source is replaced, the diode and the switch element can be used as they are without being replaced. Accordingly, the cost of the diode and the switch element can be reduced. Moreover, since the element to be attached / detached does not include the diode and the switch element, the element to be attached / detached can be reduced in size.

  (9) According to another aspect, the power supply circuit of the present invention preferably has the following configuration. At least one of the plurality of power supply modules is not detachable from the vehicle body of the vehicle.

  According to this configuration, the vibration resistance and impact resistance required for the power supply module can be reduced as compared with the case where the power supply module is detachable. Thereby, the power module can be reduced in size while ensuring the versatility of the power module.

  (10) According to another aspect, the power feeding circuit of the present invention preferably has the following configuration. The power source included in each of the plurality of power supply modules is a power storage device capable of storing power or a power generation device capable of generating power.

  With this configuration, the versatility of the power supply module can be further improved.

<Definition of terms>
A diode is an element having a characteristic that allows current flow in a single direction.

  In the present invention, a plurality of diodes are connected in parallel to each of a plurality of power supply modules, that is, a plurality of diodes are connected in parallel to a plurality of power supply modules. But there is.

  In the present invention, an electrically controllable switch element is a switch element whose on / off is controlled by an electric signal.

  According to the power supply circuit of the present invention, it is possible to prevent overvoltage to the switch elements connected in series with the power supply while ensuring the versatility of the power supply module.

FIG. 1 is a diagram illustrating a usage state of a power feeding circuit according to an embodiment of the present invention. FIG. 2 is a diagram illustrating a usage state of a power feeding circuit of a specific example of the embodiment of the present invention. FIG. 3 is a circuit diagram showing a state in which one of the plurality of power supply modules is removed from the vehicle body. FIG. 4 is a circuit diagram in the case where the timing for switching off a plurality of switch elements is shifted. FIG. 5 is a circuit diagram obtained by removing the diode from FIG. FIG. 6 is a circuit diagram illustrating a usage state of a power feeding circuit according to a modification of the embodiment of the present invention. FIG. 7 is a circuit diagram illustrating a usage state of a power feeding circuit according to a modification of the embodiment of the present invention. FIG. 8 is a circuit diagram illustrating a usage state of a power feeding circuit according to a modification of the embodiment of the present invention. FIG. 9 is a circuit diagram illustrating a usage state of a power feeding circuit according to a modification of the embodiment of the present invention. FIG. 10 is a circuit diagram illustrating a usage state of a power feeding circuit according to a modification of the embodiment of the present invention.

<Embodiment of the present invention>
The power feeding circuit 1 according to the embodiment of the present invention supplies power to the load 20 provided in the vehicle 30. The power feeding circuit 1 includes a plurality (two in FIG. 1) of power supply modules 12 and 12 connected in series. Each of the plurality of power supply modules 12 and 12 includes a power supply 121 that supplies power and a switch element 122 connected in series to the power supply 121. The power feeding circuit 1 further includes a plurality of diodes 14 and 14 connected in parallel one by one to each of the plurality of power supply modules 12 and 12. The first connection point 132 connects the diode 14 and the negative electrode of the power supply 121. Of the two connection points connecting the diode 14 and the power supply module 12, the connection point connected to the negative electrode of the power source 121 is a first connection point 132, and the connection point connected to the positive electrode of the power source 121 is a second connection point. 131. Each of the plurality of diodes 14 and 14 allows current to flow from the first connection point 132 toward the second connection point 131, but current flows from the second connection point 131 toward the first connection point 132. It is configured not to allow this.

  In a power supply circuit including a plurality of switch elements, the timing at which the plurality of switch elements are turned on or off may be shifted due to some cause. The switch element may require a response time. Therefore, it is difficult to completely synchronize the on / off operations of a plurality of switch elements. As a result, the timing at which the plurality of switch elements are turned on or off may be shifted. In addition, when any of the plurality of switch elements fails (short-circuit), the timing at which the plurality of switch elements are turned on or off is shifted.

  Assume a case where only one of a plurality of switch elements is switched off for some reason. If the diode is not connected in parallel to the switch element, the potential difference between both ends of the switch element in the off state is larger than the output voltage of one power supply. The potential difference between both ends of the switch element in the off state may be substantially the same as the sum of the output voltages of the plurality of power supplies. Therefore, the switch element may be damaged due to a potential difference between both ends of the switch element in the off state. For this reason, when a diode is not provided, the switch element is required to have a high withstand voltage.

  On the other hand, the power supply circuit 1 of the present invention includes a plurality of diodes 14 and 14 connected in parallel to each of the plurality of switch elements 122 and 122. The diode 14 allows current to flow from the first connection point 132 toward the second connection point 131, but does not allow current to flow from the second connection point 131 toward the first connection point 132. Therefore, when only one of the plurality of switch elements 122 and 122 is turned off for some reason, a current flows through the diode 14 connected in parallel with the switch element 122 in the off state. Thereby, the potential difference between both ends of the switch element 122 in the off state can be reduced to substantially the same level as the output voltage of one power supply 121. Therefore, the switch element 122 having the same withstand voltage can be used regardless of the number of power supply modules 12 included in the power supply circuit 1. That is, overvoltage to the switch element 122 can be prevented while ensuring the versatility of the power supply module 12.

  Further, since the diode 14 is connected not only in parallel to the switch element 122 but also in parallel to the power source 121, the withstand voltage required for the diode 14 can be lowered.

<Specific Examples of Embodiments of the Present Invention>
Next, a specific example of the embodiment of the present invention will be described with reference to FIGS. Basically, specific examples of embodiments of the present invention have all the features of the embodiments of the present invention described above. A description of the same parts as those of the above-described embodiment of the present invention will be omitted.

  The power feeding circuit 10 is an example of the power feeding circuit 1 according to the above-described embodiment. The power feeding circuit 10 supplies power to a load 20 provided in the vehicle (vehicle) 30. The vehicle (vehicle) 30 is, for example, a motorcycle.

  The load 20 included in the vehicle 30 is not particularly limited as long as it is driven by being supplied with electric power. The load 20 may be a device including an electrolytic capacitor and a resistor as shown in FIG. 2, for example. For example, the load 20 may be a motor used as a drive source of the vehicle 30. The load 20 may be a starter motor for starting the engine, for example. The starter motor does not correspond to a motor as a drive source of the vehicle 30. The load 20 may be, for example, a safety part (meter, horn, light, etc.). The load 20 may be a seat heater, for example.

  When the load 20 is a motor as a drive source, the vehicle 30 is not particularly limited as long as the vehicle 30 uses the motor as a drive source. Specifically, for example, the vehicle 30 may be a vehicle (electric vehicle) using only a motor as a drive source, or may be a vehicle (hybrid vehicle) using an engine and a motor as drive sources.

  When the load 20 is not a motor as a drive source, the vehicle 30 may use a motor as a drive source or may not use a motor as a drive source. Specifically, for example, the vehicle 30 may be a vehicle (engine vehicle) having only an engine as a drive source, a vehicle (electric vehicle) having only a motor as a drive source, It may be a vehicle (hybrid vehicle) using a motor as a drive source.

  The power feeding circuit 10 includes a plurality of power supply modules 12A and 12B and a plurality of diodes 14A and 14B. The plurality of power supply modules 12A and 12B are connected in series. The diode 14A is connected in parallel to the power supply module 12A. The diode 14B is connected in parallel to the power supply module 12B. That is, the plurality of diodes 14A and 14B are connected in series. The power supply module 12A and the diode 14A are connected by two connection points 131A and 132A. The power supply module 12B and the diode 14B are connected by two connection points 131B and 132B.

  The power modules 12A and 12B are an example of the power module 12 of the above-described embodiment. The diodes 14A and 14B are an example of the diode 14 of the above-described embodiment. The connection points 131A and 131B are an example of the connection point 131 of the above-described embodiment. The connection points 132A and 132B are an example of the connection point 132 of the above-described embodiment. The connection points 131A and 131B correspond to the second connection point of the present invention, and the connection points 132A and 132B correspond to the first connection point of the present invention.

  The power supply module 12A includes a power supply 121A and a switch element 122A. The power supply module 12B includes a power supply 121B and a switch element 122B. The switch element 122A is connected in series to the power source 121A. The switch element 122B is connected in series to the power source 121B. The power supplies 121A and 121B are an example of the power supply 121 of the above-described embodiment. The switch elements 122A and 122B are an example of the switch element 122 of the above-described embodiment.

  The power supplies 121A and 121B are DC power supplies. The power supplies 121A and 121B are not particularly limited as long as they can supply power. Each of the power supplies 121A and 121B has a positive electrode and a negative electrode as a pair of terminals. The power supplies 121A and 121B have the same configuration. The power supplies 121A and 121B may have different configurations.

  The power supplies 121A and 121B may be power storage devices that can store power. As an example of the electricity storage device, a primary battery or a secondary battery may be used. The secondary battery may be, for example, a lead storage battery or a lithium ion battery. Another example of the electricity storage device may be a capacitor (capacitor) or a super capacitor (ultra capacitor). A super capacitor is an electric double layer capacitor. Another example of the electricity storage device may be a stabilized power source. The stabilized power supply is a DC power supply having a function of stabilizing the output voltage. The stabilized power supply includes, for example, a secondary battery, and may be configured to stabilize the output voltage of the secondary battery.

  The power supplies 121A and 121B may be power generation devices that can generate power without storing power. As an example of the power generation device, for example, a fuel cell that generates power by a chemical reaction of fuel may be used. The fuel is, for example, hydrogen, hydrocarbon, alcohol or the like. Another example of the power generation device may be a solar cell that converts solar light energy into electric power.

  The power supply 121A (121B) may be a single power supply or a plurality of power supply elements that can supply power. For example, when the power supply 121A (121B) is a secondary battery, the power supply 121A (121B) may be a cell (power supply element) or an assembled battery including a plurality of cells. The plurality of power supply elements may be connected in series, may be connected in parallel, or may be connected in combination of series and parallel.

  The switch elements 122A and 122B can be switched between a state in which current flows and a state in which current flow is interrupted. The switch elements 122A and 122B are not particularly limited as long as they can be electrically controlled. “Electrically controllable” means that on / off is controlled by an electrical signal. That is, the switch elements 122A and 122B may be relays. The switch elements 122A and 122B have the same configuration. The switch elements 122A and 122B may have different configurations.

  The switch elements 122A and 122B may be, for example, electromagnetic relays (EMS: electro-magnetic relay) or semiconductor relays (SSR: solid-state relay). The semiconductor relay may be, for example, a MOSFET (Metal-Oxide Semiconductor Field-Effect Transistor). MOSFET is a kind of field effect transistor. The semiconductor relay may be another field effect transistor, bipolar transistor, or IGBT (insulated gate bipolar transistor).

  The switch elements 122A and 122B may be contact relays having mechanical contacts such as electromagnetic relays, and may be contactless relays having no mechanical contacts such as semiconductor relays. Note that the electromagnetic relay is also referred to as a mechanical relay.

  The switch element 122A is connected to the positive electrode of the power source 121A. The switch element 122A is disposed between the power source 121A and the connection point 131A. The connection point 131A is a connection point that connects the positive electrode of the power source 121A and the diode 14A. The switch element 122B is connected to the positive electrode of the power source 121B. The switch element 122B is disposed between the power source 121B and the connection point 131B. The connection point 131B is a connection point that connects the positive electrode of the power source 121B and the diode 14B.

  In FIG. 2, illustration of a control device that electrically controls the switch elements 122A and 122B is omitted. The switch element 122A is controlled by the control device so that, for example, it is turned on in a situation where the power supply 121A can be used and turned off in a situation where the power supply 121A cannot be used. When the power supplies 121A and 121B are lithium ion batteries, the control device that electrically controls the switch elements 122A and 122B may be, for example, a BMS (battery management system).

  The diodes 14A and 14B have the same configuration. The diodes 14A and 14B may have different configurations. The diodes 14A and 14B may be semiconductor diodes, for example. The diodes 14A and 14B may be diodes other than the semiconductor diode (for example, a bipolar vacuum tube). Each of the diodes 14A and 14B has an anode and a cathode as a pair of terminals. The diode 14A is configured to allow current to flow from the anode to the cathode in the diode 14A, but not to allow current to flow from the cathode to the anode in the diode 14A. Like diode 14A, diode 14B only allows current flow from the anode to the cathode.

  Of the two connection points 131A and 132A connecting the diode 14A and the power supply module 12A, the connection point 131A connects the diode 14A and the positive electrode of the power supply 121A, and the connection point 132A connects the diode 14A and the negative electrode of the power supply 121A. Connecting. The cathode of the diode 14A is connected to the connection point 131A. The anode of the diode 14A is connected to the electrical connection point 132A. That is, the diode 14A allows current to flow from the connection point 132A toward the connection point 131A, but does not allow current to flow from the connection point 131A to the connection point 132A.

  Of the two connection points 131B and 132B connecting the diode 14B and the power supply module 12B, the connection point 131B connects the diode 14B and the positive electrode of the power supply 121B, and the connection point 132B connects the diode 14B and the negative electrode of the power supply 121B. Connecting. The cathode of the diode 14B is connected to the connection point 131B. The anode of the diode 14B is connected to the connection point 132B. That is, the diode 14B allows current to flow from the connection point 132B to the connection point 131B, but does not allow current to flow from the connection point 131B to the connection point 132B.

  The vehicle 30 includes a vehicle main body 31, a plurality of power supply modules 12A and 12B, and a plurality of diodes 14A and 14B. In the specific example of the present embodiment, the plurality of power supply modules 12 </ b> A and 12 </ b> B and the plurality of diodes 14 </ b> A and 14 </ b> B are not included in the vehicle main body 31. The plurality of power supply modules 12 </ b> A and 12 </ b> B are detachable from the vehicle main body 31.

  The vehicle 30 includes connectors 161A, 162A, 163A, and 164A so that the power supply module 12A can be attached to and detached from the vehicle main body 31. The connector 161A is connected to a connection point 131A connected to the positive electrode of the power source 121A. The connector 162A is connected to a connection point 132A connected to the negative electrode of the power source 121A. The connectors 161A and 162A are integrated with the power supply module 12A. The connector 161A is detachably connected to the connector 163A. Connector 162A is detachably connected to connector 164A. The connectors 163A and 164A are integrally provided on the vehicle main body 31, respectively. Therefore, the connectors 161A and 162A can be attached to and detached from the connectors 163A and 164A included in the vehicle main body 31 integrally with the power supply module 12A. As shown in FIG. 2, the state where the connector 161A is connected to the connector 163A and the connector 162A is connected to the connector 164A is the state where the power supply module 12A is attached to the vehicle main body 31.

  The vehicle 30 includes connectors 161B, 162B, 163B, and 164B so that the power supply module 12B can be attached to and detached from the vehicle main body 31. Connector 161B is connected to connection point 131B connected to the positive electrode of power supply 121B. The connectors 161B and 162B are integrated with the power supply module 12B. The connector 162B is connected to a connection point 132B connected to the negative electrode of the power source 121B. Connector 161B is detachably connected to connector 163B. Connector 162B is detachably connected to connector 164B. The connectors 163B and 164B are provided integrally with the vehicle main body 31, respectively. Therefore, the connectors 161B and 162B can be attached to and detached from the connectors 163B and 164B included in the vehicle main body 31 integrally with the power supply module 12B. As shown in FIGS. 2 and 3, the state where the connector 161B is connected to the connector 163B and the connector 162B is connected to the connector 164B is a state where the power supply module 12B is attached to the vehicle body 31.

  Two connection points 131A and 132A connecting the power supply module 12A and the diode 14A are connected to two connectors 161A and 162A, respectively. Therefore, the power supply module 12A can be attached to and detached from the vehicle main body 31 integrally with the diode 14A. Two connection points 131B and 132B connecting the power supply module 12B and the diode 14B are connected to two connectors 161B and 162B, respectively. Therefore, the power supply module 12B can be attached to and detached from the vehicle body 31 integrally with the diode 14B. That is, each of the plurality of power supply modules 12A and 12B can be attached to and detached from the vehicle main body 31 integrally with a diode connected in parallel to the power supply module. Therefore, as shown in FIG. 3, when the power supply module 12 </ b> A is removed from the vehicle body 31, the diode 14 </ b> A connected in parallel to the power supply module 12 </ b> A is also removed from the vehicle body 31.

  Connection points 131A and 132B on both sides of the plurality of power supply modules 12A and 12B connected in series are connected to connectors 161A and 162B, respectively. The connectors 161A and 162B are detachably connected to connectors 163A and 164B provided on the vehicle main body 31, respectively. In addition, connection points 132A and 131B between the power supply module 12A and the power supply module 12B are connected to connectors 162A and 161B, respectively. The connectors 162A and 161B are detachably connected to connectors 164A and 163B provided on the vehicle main body 31, respectively. Therefore, the plurality of power supply modules 12 </ b> A and 12 </ b> B can be individually attached to and detached from the vehicle body 31. That is, the element including the power supply module 12A and the diode 14A and the element including the power supply module 12B and the diode 14B can be individually attached to and detached from the vehicle body 31. Therefore, as shown in FIG. 3, the power supply module 12 </ b> A and the diode 14 </ b> A can be removed from the vehicle main body 31 with the power supply module 12 </ b> B and the diode 14 </ b> B attached to the vehicle main body 31.

  The two connectors 161A and 162A connected to one power supply module 12A may be integrated so as to be attached / detached only at the same time, or may be separated so that they can be attached / detached individually. The two connectors 161B and 162B connected to one power supply module 12B may be integrated so as to be attached / detached only at the same time, or may be separated so that they can be attached / detached individually.

  The connectors 161A to 164A and 161B to 164B are DC connectors. The connection structure between the connector 161A and the connector 163A is not particularly limited. The connection structure may be, for example, a plug-in type or other than the plug-in type. The connector 161A can be attached to and detached from the connector 163A without using a tool. The connector 161A may be detachable from the connector 163A using a tool. The connection structure between the connector 162A and the connector 164A is the same as the connection structure between the connector 161A and the connector 163A. Therefore, the power supply module 12A can be attached to and detached from the vehicle body 31 without using a tool. The connection structure between the connector 161B and the connector 163B and the connection structure between the connector 162B and the connector 164B are the same as the connection structure between the connector 161A and the connector 163A.

  The vehicle body 31 may support the power supply module 12A directly or indirectly at a place other than the connectors 163A and 164A. The vehicle body 31 may support the power supply module 12B directly or indirectly at a place other than the connectors 163B and 164B. The support mode may be, for example, only contact. The mode of support may be a mode in which, for example, the element including the power supply module is detachably held on the vehicle main body 31 using the action of magnetic force. The mode of support may be a mode in which the element including the power supply module is detachably held on the vehicle main body 31 using a fitting structure of the convex part and the concave part. The mode of support may be a mode of detachably holding on the element including the power supply module and the vehicle main body 31, for example, using a screwing structure.

  The display of the power feeding circuit 10 in FIG. 2 is a display that does not include the connectors 161A and 162B. However, the power feeding circuit 10 may include connectors 161A and 162B.

  In the case where the power source 121A is a chargeable storage device, the vehicle body 31 and the power module 12A may be configured to be able to charge the power source 121A in a state where the power module 12A is attached to the vehicle body 31. In the case where the power source 121A is a chargeable power storage device, the power source module 12A may be configured to be able to charge the power source 121A in a state where it is detached from the vehicle main body 31. The same applies to the case where the power source 121B is a chargeable power storage device.

  Each of the plurality of power supply modules 12 </ b> A and 12 </ b> B is preferably detachable from a vehicle body of a vehicle different from the vehicle 30. Thereby, the versatility of power supply modules 12A and 12B can be improved.

  When the plurality of power supply modules 12 </ b> A and 12 </ b> B are attached to the vehicle main body 31, the power feeding circuit 10 is connected to the load 20. Hereinafter, the voltage of the power feeding circuit 10 in a state where the power feeding circuit 10 is connected to the load 20 will be described. First, as shown in FIG. 4, the voltage of the power feeding circuit 10 when both of the plurality of switch elements 122A and 122B are in the on state will be described.

Assume that the output voltage of the power supply 121A is V _S. The output voltage of the power supply 121B is also V _S. The voltage at the connection point 132B is V ₀ . V ₀ may be 0V or may not be 0V. The voltage at the negative electrode of the power supply 121B is V ₀ , and the voltage at the positive electrode of the power supply 121B is V ₀ + V _S. Therefore, the voltage at the connection point 131B is V ₀ + V _S. The connection point 131B has a higher voltage than the connection point 132B. As described above, the diode 14B does not allow a current to flow from the connection point 131B toward the connection point 132B. Therefore, no current flows through the diode 14B.

The voltage at the connection point 132A is V ₀ + V _S. The voltage at the negative electrode of the power source 121A is V ₀ + V _S , and the voltage at the positive electrode of the power source 121A is V ₀ + 2V _S. Therefore, the voltage at the connection point 131A is V ₀ + 2V _S. The connection point 131A has a higher voltage than the connection point 132A. As described above, the diode 14A does not allow a current to flow from the connection point 131A toward the connection point 132A. Therefore, no current flows through the diode 14A.

  The plurality of switch elements 122A and 122B are controlled so that the timings at which they are turned off coincide with each other. However, the timing at which the plurality of switch elements 122A and 122B are switched off may be shifted due to some cause. FIG. 4 shows a state where the switch element 122B is not yet turned off when the switch element 122A is turned off. As shown in FIG. 4, the voltage of the power feeding circuit 10 immediately after only the switch element 122A among the plurality of switch elements 122A and 122B is switched off will be described.

Assume that the output voltage of the power supply 121A is V _S. The output voltage of the power supply 121B is also V _S. The voltage at the connection point 132B is V ₀ . The voltage of the electric circuit in which the power supply module 12B and the diode 14B are connected in parallel is the same as when both the switch elements 122A and 122B described above are on. No current flows through the diode 14B.

The voltage at the connection point 132A is V ₀ + V _S. Since the switch element 122A has just been turned off, the voltage at the negative electrode of the power supply 121A is V ₀ + V _S , and the voltage at the positive electrode of the power supply 121A is V ₀ + 2V _S. Since the switch element 122A is off, no current flows from the power source 121A to the connection point 131A. As described above, the diode 14A allows a current to flow from the connection point 132A toward the connection point 131A. Therefore, a current flows from the connection point 132A to the connection point 131A via the diode 14A. The voltage at the connection point 131A is V ₀ + V _S. Therefore, the potential difference between both ends of the off-state switch element 122A is V _S.

Actually, when a current flows through the diode 14A, a voltage drop occurs due to the internal resistance of the diode 14A. However, since the amount of voltage drop due to the internal resistance of the diode 14A is much smaller than the output voltage V _S , the voltage drop amount due to the internal resistance is ignored here. Further, the voltage drops due to the internal resistances of the connectors 161B and 162A and the wiring are also ignored for the same reason.

Although a detailed description is omitted, immediately after only the switch element 122B of the plurality of switch elements 122A and 122B is turned off, the potential difference between both ends of the switch element 122B in the off state is substantially the same as V _S.

  Here, for comparison with FIG. 4, FIG. 5 shows a power supply circuit 90 in which the diodes 14A and 14B are removed from the power supply circuit 10 of FIG. The power supply modules 92A and 92B shown in FIG. 5 have the same configuration as the power supply modules 12A and 12B. The power supplies 921A and 921B shown in FIG. 5 have the same configuration as the power supplies 121A and 121B. The switch elements 922A and 922B shown in FIG. 5 have the same configuration as the switch elements 122A and 122B. The connectors 961A and 961B shown in FIG. 5 have the same configuration as the connectors 161A and 161B. Connectors 962A and 962B shown in FIG. 5 have the same configuration as the connectors 162A and 162B.

  FIG. 5 shows a state immediately after the switch element 922A of the plurality of switch elements 922A and 922B is switched off. The voltage of the power feeding circuit 90 at this time will be described.

The output voltage of the power supply 921A is V _S. The output voltage of the power supply 921B is also V _S. The voltage at the connector 962B is V ₀ . The voltage at the negative electrode of the power source 921B is V ₀ , and the voltage at the positive electrode of the power source 921B is V ₀ + V _S. The voltage at the negative electrode of the power source 921A is V ₀ + V _S , and the voltage at the positive electrode of the power source 921A is V ₀ + 2V _S. Since the switch element 922A is in the OFF state, no current flows from the power feeding circuit 90 to the load 20. The voltage at the connector 961A is a V _0. Therefore, the potential difference between both ends of the off-state switch element 922A is 2V _S.

  As described above, in the power feeding circuit 90 having no diode, when the timings at which the plurality of switch elements 922A and 922B are turned off are shifted, the potential difference between both ends of the switch elements in the off state is all the power supply circuits have. It is almost the same as the total output voltage of the power supply. On the other hand, in the power supply circuit 10 of the specific example of the present embodiment, when the timing at which the plurality of switch elements 122A and 122B are switched off is shifted, the potential difference between both ends of the switch element in the off state is connected in parallel with the diode. It becomes almost the same as the output voltage of one power source. Therefore, any switch element that can withstand the voltage of one power supply connected in parallel with the diode, regardless of the total voltage when mounted on the vehicle, can prevent the switch element in the off state from being damaged due to the potential difference between both ends. Can be prevented. As a result, regardless of the number of power supply modules included in the power supply circuit, switch elements having the same withstand voltage can be used, so that the versatility of the power supply module can be improved.

  The specific example of the embodiment of the present invention has the following effect in addition to the effect of the embodiment of the present invention described above.

  Since the power supply module is detachable from the vehicle body, the versatility of the power supply module can be improved.

  Since the power supply module and the diode can be integrally attached to and detached from the vehicle body, the versatility of the power supply module can be further improved. Specifically, for example, it is assumed that there is a vehicle including a conventional power supply circuit that does not have a diode and in which a power supply module of the power supply circuit is detachably mounted. Instead of the conventional power supply module, a vehicle in which the power supply module and the diode are integrated can be mounted on this vehicle.

  Since the plurality of power supply modules can be individually attached to and detached from the vehicle body, the plurality of power supply modules are not integrated. Therefore, the same power supply module can be used for vehicles having different numbers of power supply modules. Thus, the versatility of the power supply module can be further improved. Further, when any of the plurality of power supply modules fails, only the failed power supply module can be replaced.

<Modification of Embodiment of the Present Invention>
The present invention is not limited to the above-described embodiments and specific examples thereof, and various modifications are possible as long as they are described in the claims. Hereinafter, a modified example of the embodiment of the present invention will be described. In addition, about what has the same structure as the structure mentioned above, the description is abbreviate | omitted suitably using the same code | symbol. The above-described embodiments, specific examples of the embodiments, and modifications described below can be implemented in appropriate combination.

◆ Change example 1
In the specific example of the embodiment, the switch elements 122A and 122B are connected to the positive electrodes of the power supplies 121A and 121B, respectively. However, in the present invention, each of the plurality of switch elements may be connected to the negative electrode of the power supply of the power supply module including the switch element, or may be connected to the positive electrode.

  FIG. 6 shows an example in which the switch element is connected to the negative electrode of the power source. The power supply circuit 210 illustrated in FIG. 6 includes a plurality of power supply modules 212A and 212B. The power supply module 212A includes a power supply 121A and a switch element 122A connected to the negative electrode of the power supply 121A. The switch element 122A is connected to a connection point 132A that connects the negative electrode of the power source 121A and the diode 14A. The power supply module 212B includes a power supply 121B and a switch element 122B connected to the negative electrode of the power supply 121B. The switch element 122B is connected to a connection point 132B that connects the negative electrode of the power source 121B and the diode 14B. Since the voltage of the power feeding circuit 210 when the timing at which the switch elements 122A and 122B are switched off is shifted depends on the circuit configuration of the load 20, it cannot be clearly described as in the specific example of the embodiment. However, also in this modified example, as in the specific example of the embodiment, when the timing at which the plurality of switch elements are turned off is shifted, the potential difference between both ends of the switch element in the off state is set as the output voltage of one power supply. It can be reduced to almost the same level.

◆ Change example 2
The power supply circuit 10 of the specific example of the embodiment has two power supply modules. However, the power supply circuit of the present invention may have more than two power supply modules.

◆ Modification 3
In the present invention, the plurality of power supplies included in the power feeding circuit may include two power supplies having different configurations, or may have the same configuration. The different power supply configurations include not only the different types of power sources mentioned in the specific example of the embodiment but also the cases where the sizes are different and the materials are different. When all of the plurality of power sources are power storage devices, the configuration of the power source is different. For example, when the material of the portion related to the accumulation of power is different, the charge capacity is different, the discharge capacity is different, the charge rate is 100 %, The charge characteristics are different, the discharge characteristics are different, and the like.

  In the present invention, the plurality of switch elements included in the power feeding circuit may include two switch elements having different configurations, or may have the same configuration. In the present invention, the plurality of power supply modules included in the power feeding circuit may include two power supply modules having different configurations, or may have the same configuration. In the present invention, the plurality of diodes included in the power feeding circuit may include two diodes having different configurations, or may have the same configuration.

◆ Modification 4
In the specific example of the embodiment, a part of the plurality of connectors (connectors 164A and 163B) for connecting the power supply module 12A and the power supply module 12A in series is provided in the vehicle main body 31. In other words, a part of the plurality of connectors for making the plurality of power supply modules 12 </ b> A and 12 </ b> B individually attachable to and detachable from the vehicle body 31 is provided on the vehicle body 31. However, in the present invention, none of the connectors for connecting the power supply modules in series need be provided on the vehicle body.

  FIG. 7 shows an example in which none of the connectors for connecting the power supply modules in series is provided on the vehicle body. A power supply circuit 310 illustrated in FIG. 7 includes a plurality of power supply modules 12A and 12B and a plurality of diodes 14A and 14B connected in parallel to the plurality of power supply modules 12A and 12B, respectively. Similarly to the specific example of the embodiment, the connection points 131A and 132B on both sides of the plurality of power supply modules 12A and 12B connected in series are connected to the connectors 161A and 162B, respectively. The connectors 161A and 162B are detachably connected to connectors 163A and 164B provided on the vehicle main body 331, respectively. Unlike the specific example of the embodiment, the connection points 132A and 131B between the power module 12A and the power module 12B are connected to the connectors 362A and 361B. Connector 362A is detachably connected to connector 361B. The connectors 362A and 361B are not provided on the vehicle main body 331. With the above configuration, the plurality of power supply modules 12 </ b> A and 12 </ b> B can be individually attached to and detached from the vehicle body 31.

◆ Change example 5
In the specific example of the embodiment, the plurality of power supply modules 12 </ b> A and 12 </ b> B included in the power feeding circuit 10 can be attached to and detached from the vehicle body 31.
However, the power supply circuit of the present invention is not limited to this configuration. In the present invention, only a part of the plurality of power supply modules included in the power supply circuit may be detachable from the vehicle body. When the specific example of the embodiment is combined with this modification, in the present invention, at least one power supply module among the plurality of power supply modules included in the power feeding circuit may be detachable from the vehicle body.

  In the present invention, at least one of the plurality of power supply modules included in the power feeding circuit may be detachable from the vehicle body. For example, all of the plurality of power supply modules included in the power feeding circuit may be detachable from the vehicle body. In this case, all of the plurality of diodes included in the power feeding circuit cannot be attached to or detached from the vehicle body. When the power supply module is not attachable to and detachable from the vehicle body, the connector may not be used for connection between the power supply module and the vehicle load. When the power supply module is not detachable from the vehicle body, for example, a wiring that connects the power supply module and the vehicle load may be connected by welding, screws, or the like. When at least one of the plurality of power supply modules included in the power supply circuit is not attachable to and detachable from the vehicle body, the following effects are obtained. The vibration resistance and impact resistance required for the power supply module can be reduced as compared with the case where the power supply module is detachable. Thereby, the power module can be reduced in size while ensuring the versatility of the power module.

◆ Modification 6
In the specific example of the embodiment, the plurality of power supply modules 12A and 12B can be attached to and detached from the vehicle main body 31 integrally with the diodes 14A and 14B, respectively. Furthermore, the plurality of power supply modules 12 </ b> A and 12 </ b> B can be individually attached to and detached from the vehicle body 31.
However, in the present invention, each of at least two of the plurality of power supply modules included in the power supply circuit is detachable from the vehicle body integrally with a diode connected in parallel to the power supply module. In this case, the configuration is not limited to the above. The at least two power supply modules may be integrally attached to and detached from the vehicle body.
For example, all of the plurality of power supply modules included in the power feeding circuit may be integrally removable from the vehicle body. Since at least two power supply modules can be integrally attached to and detached from the vehicle body, the following effects can be obtained. Compared to the case where at least two power supply modules can be individually attached to and detached from the vehicle body, the number of connection portions for attaching and detaching the power supply module to and from the vehicle body can be reduced. Therefore, attachment / detachment can be performed more easily.

  FIG. 8 shows an example in which a plurality of power supply modules can be integrally attached to and detached from the vehicle body. The power supply circuit 410 illustrated in FIG. 8 includes a plurality of power supply modules 12A and 12B and a plurality of diodes 14A and 14B connected in parallel to the plurality of power supply modules 12A and 12B, respectively. Similarly to the specific example of the embodiment, the connection points 131A and 132B on both sides of the plurality of power supply modules 12A and 12B connected in series are connected to the connectors 161A and 162B, respectively. The connectors 161A and 162B are detachably connected to connectors 163A and 164B provided on the vehicle main body 31, respectively. Unlike the specific example of the embodiment, the connection points 132A and 131B between the power supply module 12A and the power supply module 12B are not connected to the connector. Therefore, the plurality of power supply modules 12 </ b> A and 12 </ b> B can be integrally attached to and detached from the vehicle main body 431.

◆ Change example 7
In the specific example of the embodiment, the plurality of power supply modules 12A and 12B can be attached to and detached from the vehicle main body 31 integrally with the diodes 14A and 14B, respectively.
However, the power supply circuit of the present invention is not limited to this configuration. In the present invention, each of at least one of the plurality of power supply modules included in the power supply circuit may be detachable from the vehicle body including a diode connected in parallel with the power supply module. For example, only a part of the plurality of power supply modules may be detachable from the vehicle body including a diode connected in parallel with the power supply module. In this case, at least one of the plurality of diodes included in the power feeding circuit is not attachable to and detachable from the vehicle body. Further, for example, all of the plurality of power supply modules may be detachable from the vehicle body including a plurality of diodes. In this case, all of the plurality of diodes included in the power feeding circuit cannot be attached to and detached from the vehicle body. When at least two of the plurality of power modules are detachable from the vehicle body including a diode connected in parallel with the power modules, the at least two power modules are individually It can be attached to and detached from the vehicle body. Since the power supply module can be attached to and detached from the vehicle body including a diode connected in parallel with the power supply module, the following effects can be obtained. When replacing the power supply module, the diode can be used as it is without being replaced. Accordingly, the cost of the diode can be reduced. Further, since the detachable element does not include a diode, the detachable element can be reduced in size.

  FIG. 9 shows an example in which a plurality of power supply modules can be attached to and detached from a vehicle body including a plurality of diodes. A power supply circuit 510 illustrated in FIG. 9 includes a plurality of power supply modules 12A and 12B and a plurality of diodes 14A and 14B connected in parallel to the plurality of power supply modules 12A and 12B, respectively. A connector 561A and a connector 563A that are detachably connected are arranged between the power supply module 12A and the connection point 131A. A connector 562A and a connector 564A that are detachably connected are disposed between the power supply module 12A and the connection point 132A. Connectors 563A and 564A are included in vehicle body 531. Therefore, the power supply module 12A can be attached to and detached from the vehicle main body 531 including the diode 14A. Further, a connector 561B and a connector 563B that are detachably connected are disposed between the power supply module 12B and the connection point 131B. A connector 562B and a connector 564B that are detachably connected are arranged between the power supply module 12B and the connection point 132B. Connectors 563B and 564B are included in vehicle body 531. Therefore, the power supply module 12B can be attached to and detached from the vehicle main body 531 including the diode 14B. Further, the two power supply modules 12A and 12B can be attached to and detached from the vehicle main body 531 individually.

◆ Change example 8
In the present invention, at least one of the plurality of power supplies included in the plurality of power supply modules may be detachable from the vehicle body without being integrated with the switch element. That is, each of at least one of the plurality of power supplies is detachable from a vehicle body including a switch element included in a power supply module including the power supply and a diode connected in parallel with the power supply. Also good. For example, all of the plurality of power supplies may be detachable from the vehicle body without being integrated with the switch element. For example, only a part of the plurality of power supplies may be detachable from the vehicle body without being integrated with the switch element. In this case, the power supply module including the remaining power supply may be detachable from the vehicle body including the diode. The power supply module including the remaining power supply may be detachable from the vehicle body integrally with the diode. The power supply module including the remaining power supply may be detachable from the vehicle body. The power supply is detachable from the vehicle main body including the switch element included in the power supply module including the power supply and the diode connected in parallel with the power supply, thereby obtaining the following effects. When replacing the power supply, the diode and the switch element can be used as they are without replacement. Accordingly, the cost of the diode and the switch element can be reduced. Moreover, since the element to be attached / detached does not include the diode and the switch element, the element to be attached / detached can be reduced in size.

  FIG. 10 shows an example in which a plurality of power supplies can be attached to and detached from a vehicle body including a plurality of switch elements and a plurality of diodes. A power supply circuit 610 shown in FIG. 10 includes a plurality of power supply modules 12A and 12B and a plurality of diodes 14A and 14B connected in parallel to the plurality of power supply modules 12A and 12B, respectively. A connector 661A and a connector 663A that are detachably connected are disposed between the power source 121A and the switch element 122A. The switch element 122A is disposed between the connector 663A and the connection point 131A. A connector 662A and a connector 664A that are detachably connected are arranged between the power source 121A and the connection point 132A. The connectors 663A and 664A are included in the vehicle main body 631. Therefore, the power supply 121A is detachable from the vehicle main body 631 including the switch element 122A and the diode 14A. As shown in FIG. 6, when the switch element 122A is connected to the negative electrode of the power source 121A, the switch element 122A is disposed between the connector 664A and the connection point 132A. Further, a connector 661B and a connector 663B that are detachably connected are disposed between the power source 121B and the switch element 122B. A connector 662B and a connector 664B are detachably connected between the power supply 121B and the connection point 132B. The connectors 663B and 664B are included in the vehicle main body 631. Therefore, the power source 121B can be attached to and detached from the vehicle main body 631 including the switch element 122B and the diode 14B. The two power supplies 121A and 121B can be attached to and detached from the vehicle main body 631 individually.

◆ Modification 9
In the specific example of the above embodiment, the connectors 161A to 164A and 161B to 164B are used so that the power supply modules 12A and 12B can be attached to and detached from the vehicle body 31. However, in the present invention, the connector may not be used when the power supply module is detachable from the vehicle body. In the present invention, when the power supply module can be attached to and detached from the vehicle body, it is preferable that the power supply module can be attached and detached without using a tool regardless of whether or not the connector is used.

◆ Change example 10
In the present invention, the vehicle may be one that travels on land, may travel on water, may travel in water, or may travel in the air. . Vehicles that travel on land are, for example, four-wheel vehicles, two-wheel vehicles, three-wheelers, snowmobiles, and the like. A vehicle traveling on land may have more than four wheels. The four-wheeled vehicle is, for example, a passenger car, an ATV (All Terrain Vehicle), a ROV (Recreational Off-highway Vehicle), a golf cart, a forklift, or the like. The two-wheeled vehicle may have two wheels lined up in the front-rear direction, or may have two wheels lined up in the left-right direction. Examples of the former include motorcycles (motorcycles), scooters, mopeds, bicycles, and the like. The tricycle may have two front wheels or two rear wheels. Vehicles that travel on the water are, for example, ships, water bikes, and the like. The vehicle that travels underwater is, for example, a submersible craft. Vehicles that travel in the air are, for example, airplanes, helicopters, drones, and the like.

◆ Change example 11
The power supply circuit of the present invention may be capable of supplying power to a load provided in a vehicle and may be capable of supplying power to a load provided in a device other than the vehicle.

  The battery module of Japanese Patent Application No. 2017-024641 which is the basic application of the present application is included in the power supply module of the present specification. The battery in the basic application is included in the power supply of the present specification. The connection terminals 161A to 164A and 161B to 164B in the basic application correspond to the connectors 161A to 164A and 161B to 164B in the present specification.

1, 10, 210, 310, 410, 510, 610 Power supply circuit 12, 12A, 12B, 212A, 212B Power supply module 121, 121A, 121B Power supply 122, 122A, 122B Switch element 14, 14A, 14B Diode 131, 131A, 131B Connection point (second connection point)
132, 132A, 132B Connection point (first connection point)
20 Load 30 Vehicle 31, 331, 431, 531, 631 Vehicle body

Claims (10)

A power supply circuit comprising a plurality of power supply modules connected in series and supplying power to a load provided in a vehicle,
Each of the plurality of power supply modules is
A power supply for supplying power;
A switching element connected in series to the power source,
A plurality of diodes connected in parallel one by one to each of the plurality of power supply modules,
Each of the plurality of diodes allows a current to flow from a first connection point connecting the diode and the negative electrode of the power supply to a second connection point connecting the diode and the positive electrode of the power supply. However, the power feeding circuit is configured not to allow current to flow from the second connection point toward the first connection point. The power supply circuit according to claim 1,
The power supply circuit, wherein the switch element is an electrically controllable switch element. The feed circuit according to claim 1 or 2,
At least one power supply module among the plurality of power supply modules is detachable from a vehicle body of the vehicle. The power supply circuit according to claim 3,
Each of the at least one power supply module among the plurality of power supply modules is a power feeding circuit that is detachably attached to the vehicle main body integrally with the diode connected in parallel to the power supply module. The power supply circuit according to claim 4,
Each of at least two power supply modules of the plurality of power supply modules can be attached to and detached from the vehicle body integrally with the diode connected in parallel to the power supply module.
The power supply circuit, wherein the at least two power supply modules can be individually attached to and detached from the vehicle body. The power supply circuit according to claim 4,
Each of at least two power supply modules of the plurality of power supply modules can be attached to and detached from the vehicle body integrally with the diode connected in parallel to the power supply module.
The power supply circuit, wherein the at least two power supply modules are integrally detachable from the vehicle body. The power supply circuit according to claim 3,
Each of the at least one power supply module of the plurality of power supply modules is detachable from the vehicle body including the diode connected in parallel with the power supply module. The feed circuit according to any one of claims 1 to 7,
At least one of the plurality of power supplies included in the plurality of power supply modules is configured to be detachable from the vehicle body of the vehicle,
Each of at least one of the plurality of power supplies included in the plurality of power supply modules includes the switch element included in the power supply module including the power supply, and the diode connected in parallel with the power supply. A power supply circuit that is detachable from the main body. The feed circuit according to any one of claims 1 to 8,
At least one of the plurality of power supply modules is a power supply circuit that is not attachable to and detachable from a vehicle main body of the vehicle. The power supply circuit according to any one of claims 1 to 9,
The power supply circuit, wherein the power source included in each of the plurality of power supply modules is a power storage device capable of storing power or a power generation device capable of generating power.

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