JP2015115979A - Vehicular auxiliary power feeder - Google Patents

Abstract

An object of the present invention is to reduce a reaction time of a current disconnection of a protection circuit of a vehicle auxiliary power supply device. When a first detection unit 1b detects that a vehicle auxiliary power supply apparatus 100 is approaching an abnormal state, a control circuit unit 4 controls a gate voltage of a first MOSFET 1a to If the current path between the input terminal 20 and the lithium ion storage battery 2 is interrupted by the MOSFET 1a, and the second detection unit 3b detects that the auxiliary power feeding device 100 for the vehicle is approaching an abnormal state, the second MOSFET 3a And the current path between the lithium ion storage battery 2 and the output terminal 31 is interrupted by the second MOSFET 3a. [Selection] Figure 3

Description

  The present invention relates to a vehicle auxiliary power supply apparatus having at least a function as a jump starter that performs a jump start for supplying electric power to a vehicle battery via a booster cable and starting a vehicle engine when the vehicle battery of the vehicle rises. About.

  Conventionally, an auxiliary power supply device (jump starter) for a vehicle has a low battery capacity due to a shortage of battery capacity due to an increase in the amount of electricity consumed, for example, on the road, and so on. When the electrical component stops operating (so-called when the battery runs out), a jump start is performed to start the vehicle engine by supplying power to the in-vehicle battery via the booster cable (for example, (See Patent Documents 1 and 2).

  Furthermore, in addition to having a function as a jump starter, some auxiliary power supply devices for vehicles have a function as a portable power source that supplies power to external devices such as a notebook PC, a mobile phone, and a portable music player.

  In addition, such a conventional auxiliary power supply device for a vehicle has a built-in protection circuit composed of a relay circuit or the like, and the overcharge, overcurrent, reverse connection and overdischarge are performed by the protection circuit composed of the relay circuit or the like. It is prevented that an abnormal state such as the above occurs.

  For example, in a vehicle in which electric power is supplied to the in-vehicle battery via the booster cable by the auxiliary power supply device for the vehicle and a jump start is performed, when the generator of the vehicle is activated as the engine is activated, the vehicle A large current (overcurrent) is supplied from the generator to the auxiliary power feeder for the vehicle. When the overcurrent is detected by the detector, the auxiliary power supply device for a vehicle shuts off the overcurrent (cuts off) by cutting off the current path (cutting off the current) by a protection circuit configured by a relay circuit or the like. To do.

  And in order to shut down (cut-off) overcurrent etc. more reliably, the auxiliary | assistant electric power feeder for vehicles is calculated | required to further shorten the reaction time of an electric current cutting | disconnection.

Utility Model Registration No. 3185027 Design Registration No. 1459731

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a vehicular auxiliary power supply apparatus capable of shortening the current disconnection reaction time as compared with the prior art.

  The auxiliary power feeding device for a vehicle according to the present invention is a jump starter that performs a jump start for supplying electric power to the in-vehicle battery via a booster cable and starting the engine of the vehicle when the in-vehicle battery of the vehicle rises. This is an auxiliary power supply device for a vehicle having at least a function. The auxiliary power feeding device for a vehicle according to the present invention includes a housing, an input terminal that is installed on a side wall of the housing, and a charging cable is connected to the outside, and is installed in the housing and is connected to the input terminal. A connected charging circuit unit, a lithium ion storage battery installed in the casing and internally connected to the charging circuit unit, an output circuit unit installed in the casing and internally connected to the lithium ion storage battery, and A control circuit unit that is installed in the casing and controls the operation of the charging circuit unit and the output circuit unit, and is installed on a side wall of the casing and is internally connected to the output circuit unit. And an output terminal for jump start connected externally. Further, the charging circuit unit is connected in series to a current path between the input terminal and the lithium ion storage battery, and the first MOSFET for conducting or blocking the current path, the input terminal and the control circuit unit, A first detection unit that detects an abnormality of the auxiliary power feeding device for a vehicle, and the output circuit unit is connected in series to a current path between the lithium ion storage battery and the output terminal. A second MOSFET that conducts or cuts off the current path, and a second detection unit that is connected between the output terminal and the control circuit unit and detects an abnormality of the auxiliary power supply device for a vehicle. . Further, the control circuit unit controls the gate voltage of the first MOSFET when the first detection unit detects that the vehicle auxiliary power supply device is approaching an abnormal state, and controls the first MOSFET. If the MOSFET interrupts the current path between the input terminal and the lithium ion storage battery, and the second detection unit detects that the vehicle auxiliary power supply device is approaching an abnormal state, the second detection unit The gate voltage of the MOSFET is controlled, and the current path between the lithium ion storage battery and the output terminal is interrupted by the second MOSFET.

  The present invention relates to a vehicle auxiliary power supply apparatus having at least a function as a jump starter that performs a jump start for supplying electric power to a vehicle battery via a booster cable and starting a vehicle engine when the vehicle battery of the vehicle rises. As a protection circuit for protecting against an abnormal state such as overcharge, overcurrent, reverse connection and overdischarge, a MOSFET is used instead of a conventionally used relay circuit as a protection circuit. The current disconnection reaction time can be shortened compared to the conventional case where a relay circuit is used. Therefore, according to the present invention, the current can be cut off more quickly than the conventional case where the relay circuit is used as the protection circuit, and the auxiliary power supply device for the vehicle is surely overcharged, overcurrent, reverse connected, overdischarged, etc. Can be prevented.

It is the perspective view seen from the front side slanting upper part which showed the auxiliary power feeder for vehicles to which this invention is applied. It is the perspective view seen from the front side right diagonal upper direction which showed the auxiliary power supply apparatus for vehicles. It is the block diagram which showed the electrical connection state of the component of the auxiliary power supply apparatus for vehicles. It is the perspective view which showed the auxiliary | assistant electric power feeder for vehicles of the state which connected the vehicle-mounted battery of the motor vehicle which jump-starts via a booster cable to the 1st DC output terminal.

  Hereinafter, a vehicle auxiliary power supply apparatus to which the present invention is applied will be described in detail with reference to the drawings. In addition, this invention is not limited to the following examples, It can change arbitrarily in the range which does not deviate from the summary of this invention.

  The auxiliary power supply device for a vehicle 100 to which the present invention is applied is such that, for example, on the road or the like, due to an increase in the amount of electricity consumed, the battery 200 mounted on the vehicle tends to discharge and the battery capacity becomes insufficient and the voltage drops. Has a function as a jump starter that starts the engine to start jumping by supplying power via a booster cable when the battery stops operating (so-called when the battery runs out). Further, the auxiliary power supply device 100 for a vehicle has, for example, a capacity of 12V / 4.5Ah corresponding to a gasoline passenger car up to 3000cc, a capacity of 12V / 9.0Ah corresponding to a gasoline passenger car in general and a diesel car up to 3500cc, or It has a capacity of 24V / 9Ah that can accommodate diesel vehicles up to 13000cc. Further, the auxiliary power supply device for a vehicle 100 has a function as a portable power source for supplying power to an external device such as a notebook PC, a mobile phone, and a portable music player in addition to the function as a jump starter.

  Specifically, the vehicular auxiliary power supply apparatus 100 includes a thin box-shaped housing 10 as shown in FIGS. 1 and 2. Further, as shown in FIG. 3, a charging circuit unit 1, a lithium ion storage battery 2, an output circuit unit 3, and a control circuit unit 4 are built in the housing 10. The lithium ion storage battery 2 may be configured by one lithium ion storage battery, or may be configured by connecting a plurality of lithium ion storage batteries in series.

  Further, when the housing 10 has a capacity of 12 V / 4.5 Ah corresponding to a gasoline passenger car up to 3000 cc, for example, it has a size of 45 mm × 190 mm × 135 mm (height × width × depth) and a weight of about 800 g. And has a capacity of 12V / 9.0Ah corresponding to all gasoline passenger cars and diesel cars up to 3500cc, for example, it is 45mm x 190mm x 160mm (height x width x depth) and weighs 1220g If it has a capacity of 24V / 9.0Ah corresponding to a diesel car up to 13000cc, for example, it is 68mm x 196mm x 228mm (height x width x depth) and weighs about 1900g Is done.

  Further, in the auxiliary power supply device 100 for a vehicle, as shown in FIG. 1, a DC input terminal 20 for receiving, for example, 12 V power supply from a household power source or a car battery is installed on the left side wall 11 of the housing 10. Yes.

  The DC input terminal 20 includes a DC jack to which a charging power supply cable is externally connected via a DC plug.

  Furthermore, the charging circuit unit 1 is internally connected to the DC input terminal 20 as shown in FIG. A lithium ion storage battery 2 is internally connected to the charging circuit unit 1. An output circuit unit 3 is internally connected to the lithium ion storage battery 2. Further, a control circuit unit 4 is internally connected to the charging circuit unit 1 and the output circuit unit 3.

  Further, as shown in FIG. 3, the auxiliary power feeding device 100 for a vehicle includes, for example, a first DC output terminal 31 for jump start and a second DC output terminal for PC power supply that are internally connected to the output circuit unit 3. 32, a third DC output terminal 33 for USB power supply and a fourth DC output terminal 34 for memory backup power supply.

  The first DC output terminal 31 is a jack to which a booster cable is externally connected via a plug.

  The second DC output terminal 32 is a jack to which a PC power cable is externally connected via a plug.

  The third DC output terminal 33 is a USB socket to which a USB cable is externally connected via a USB plug.

  The fourth DC output terminal 34 includes a cigar socket to which an external power cable is externally connected via a cigar plug.

  The first DC output terminal 31 for jump start and the second DC output terminal 32 for PC power supply are installed on the right side wall 12 of the housing 10 as shown in FIG. Further, as shown in FIG. 1, the third DC output terminal 33 for USB power supply is installed on the front wall 13 of the housing 10. Further, the fourth DC output terminal 34 for the memory backup power supply is installed on the left side wall 11 of the housing 10.

  Further, as shown in FIG. 3, the auxiliary power supply apparatus 100 for a vehicle includes a power switch 41, a jump start switch 42, a light select switch 43, and a sidelight on / off switch 44 that are internally connected to the control circuit unit 4. Prepare. The power switch 41, the jump start switch 42, the light select switch 43, and the side light on / off switch 44 are installed on the front wall 13 of the housing 10 as shown in FIG.

  Further, as shown in FIG. 3, the auxiliary power feeding device 100 for a vehicle includes a charge amount display unit 51, a battery low display lamp 52, a pair of emergency warning lamps 53 </ b> A and 53 </ b> B, and a pair of emergency warning lamps internally connected to the control circuit unit 4. Side illumination lamps 54A and 54B are provided.

  The charge amount display unit 51 and the pair of emergency warning lights 53A and 53B are installed on the front wall 13 of the housing 10 as shown in FIG.

  The charge amount display unit 51 includes a plurality of LEDs (for example, four colors of red, orange, yellow, and green) that are arranged in a straight line and have different emission colors. Further, the charge amount display unit 51 is controlled by the control circuit unit 4 to perform not only the function of displaying the charge amount as a bar, but also functions as a power lamp when lit in green, and functions as a jump start lamp when lit as yellow. To do. The pair of emergency warning lamps 53A and 53B is composed of a red LED and a white LED, and is controlled by the control circuit unit 4 to function as an emergency warning lamp by alternately flashing.

  Moreover, the battery low indicator lamp 52 is installed in the left side wall 11 of the housing | casing 10, as shown in FIG.

  Further, the battery low indicator lamp 52 is composed of a red LED, and when the voltage of the lithium ion storage battery 2 constantly monitored by the control circuit unit 4 decreases to a predetermined value, the battery low indicator lamp 52 is controlled by the control circuit unit 4 to flash or light up. It functions as a battery low indicator that warns that it is in an overdischarged state.

  Moreover, as shown in a pair of side illumination lamps 54A and 54B and FIG.1 and FIG.2, it installs in the left side wall 11 and the right side wall 12 of the housing | casing 10. FIG.

  Each of the pair of side illumination lamps 54A and 54B includes a plurality of white LEDs arranged linearly.

  The charging circuit unit 1 is installed in a housing 10 and, as shown in FIG. 3, a first MOSFET (Metal Oxide Semiconductor Field) connected in series to a current path between the DC input terminal 20 and the lithium ion storage battery 2. (Effect Transistor) 1a and a first detection unit 1b connected between the DC input terminal 20 and the control circuit unit 4 for detecting an abnormality in the auxiliary power supply device 100 for a vehicle. As for this 1st MOSFET1a, when the gate voltage is controlled by the control circuit part 4, conduction | electrical_connection and interruption | blocking of the electric current path between the DC input terminal 20 and the lithium ion storage battery 2 are controlled.

  And the control circuit part 4 controls the gate voltage of the 1st MOSFET 1a, for example, when it is detected by the 1st detection part 1b that any of the lithium ion storage batteries 2 has approached the state of overcharge, The first MOSFET 1a quickly cuts off the current path between the DC input terminal 20 and the lithium ion storage battery 2 to prevent the vehicle auxiliary power supply device 100 from being overcharged.

  In other words, the first MOSFET 1a is used as a protection circuit for protecting the vehicle auxiliary power supply apparatus 100 from being in an abnormal state such as overcharge in the vehicle auxiliary power supply apparatus 100. The first MOSFET 1a is not limited to being used as a protection circuit for protecting the vehicle auxiliary power supply device 100 from being in an abnormal state such as overcharge in the vehicle auxiliary power supply device 100. You may make it use as a protection circuit for protecting the auxiliary | assistant electric power feeder 100 for vehicles, such as overcurrent, reverse connection, and overheating, not falling into other abnormal states.

  The output circuit unit 3 is installed in the housing 10 and is in series with a current path between the lithium ion storage battery 2 and the first to fourth DC output terminals 31, 32, 33, and 34, as shown in FIG. A second MOSFET 3a connected, and connected between the first to fourth DC output terminals 31, 32, 33, 34 and the control circuit unit 4, and detects a malfunction of the auxiliary power feeding device 100 for the vehicle. Detector 3b. The second MOSFET 3 a is connected to the current path between the lithium ion storage battery 2 and the first to fourth DC output terminals 31, 32, 33, 34 when the gate voltage is controlled by the control circuit unit 4. And shut off are controlled. The second MOSFET 3a may be provided between the lithium ion storage battery 2 and the first to fourth DC output terminals 31, 32, 33, and 34, respectively. Furthermore, the second detection unit 3 b may be provided between each of the first to fourth DC output terminals 31, 32, 33, and 34 and the control circuit unit 4.

  Then, the control circuit unit 4 exceeds the allowable range by, for example, an abnormal large current being discharged from the auxiliary power feeding device 100 for the vehicle by the second detection unit 3b or by starting the generator accompanying the starting of the vehicle engine. Is detected as approaching an overcurrent state such as flowing into the auxiliary power supply apparatus 100 for the vehicle, the second MOSFET 3a causes the lithium ion storage battery 2 and the first to fourth DC output terminals 31, 32, 33 to be , 34 is quickly cut off to prevent the auxiliary power feeding device 100 for the vehicle from becoming overcurrent.

  Further, when the control circuit unit 4 detects, for example, a reverse connection in which the positive terminal and the negative terminal of the booster cable 120 are connected in reverse by the second detection unit 3b, the second MOSFET 3a performs lithium ion detection. The current path between the ion storage battery 2 and the first to fourth DC output terminals 31, 32, 33, 34 is quickly cut off to prevent the vehicle auxiliary power supply device 100 from being damaged due to reverse connection. .

  Further, for example, when the second detection unit 3b detects that the control circuit unit 4 is approaching an overdischarge state, the control circuit unit 4 uses the second MOSFET 3a to connect the lithium ion storage battery 2 and the first to fourth DC output terminals. The current path between 31, 32, 33, and 34 is quickly cut off to prevent the vehicle auxiliary power supply apparatus 100 from being overdischarged.

  That is, the second MOSFET 3a is used as a protection circuit in the vehicle auxiliary power supply device 100 to protect the vehicle auxiliary power supply device 100 from being in an abnormal state such as overcurrent, reverse connection, and overdischarge. Yes. The second MOSFET 3a is limited to being used as a protection circuit for protecting the vehicle auxiliary power supply device 100 from the abnormal state such as overcurrent, reverse connection and overdischarge in the vehicle auxiliary power supply device 100. However, it may be used as a protection circuit for protecting the auxiliary power supply apparatus 100 for the vehicle from falling into another abnormal state such as overheating.

  The control circuit unit 4 is installed in the housing 10 and is composed of, for example, a microcomputer. The control unit 4 controls the operation of the charging circuit unit 1. The output control unit controls the operation of the output circuit unit 3. It functions as a display control unit that controls the operation of 51 and the like. Then, the control circuit unit 4 controls the operations of the charging circuit unit 1 and the output circuit unit 3 that are internally connected as follows.

  The control circuit unit 4 is externally connected to the DC input terminal 20 with an AC adapter cable for supplying 12V power for charging from a household power supply or a cigar plug cable for supplying 12V power supply from an automobile battery, for example. When charging power is supplied from a household power source or an automobile battery, and it is detected that a voltage equal to or higher than a predetermined voltage value is applied to the DC input terminal 20, the charging mode is controlled.

  In the control of the charging mode, the control circuit unit 4 controls the operation of the charging circuit unit 1 to charge the lithium ion storage battery 2 through the charging circuit unit 1, and the lithium ion storage battery 2 is charged to full charge. Then, the gate voltage of the first MOSFET 1a is controlled, the current path between the DC input terminal 20 and the lithium ion storage battery 2 is quickly cut off, and the charging is terminated. Furthermore, the control circuit unit 4 controls the gate voltage of the first MOSFET 1a when the first detection unit 1b detects that any one of the lithium ion storage batteries 2 is approaching an overcharge state during the charge control. Then, the first MOSFET 1a quickly cuts off the current path between the DC input terminal 20 and the lithium ion storage battery 2 to prevent the vehicle auxiliary power supply apparatus 100 from being overcharged.

  In addition, the control circuit unit 4 controls the operation of the output circuit unit 3 during charging control, and prohibits power supply from the output circuit unit 3 to the outside.

  Further, during the charge control, the control circuit unit 4 controls the operation of the charge amount display unit 51 and controls the charge amount display unit 51 to display the charge amount as a bar.

  The operation of the charge amount display unit 51 is controlled by the control circuit unit 4, and from an uncharged state, a red blinking state indicating a battery remaining amount of 20% or less, a red lighting state indicating a battery remaining amount of 20% to 30%, a battery Charging proceeds to a fully charged state, from an orange lighting state indicating 30% to 40% remaining, a yellow lighting state indicating 70% to 70%, and a green lighting state indicating 70% to 100% remaining battery level The lighting state changes sequentially according to the above.

  The vehicular auxiliary power supply apparatus 100 having the above-described configuration is used as a portable jump starter in a state where the lithium ion storage battery 2 is charged, and is also used as a portable power supply apparatus for using electric equipment outdoors. The

  Specifically, the auxiliary power supply device for a vehicle 100 is used as a jump starter as follows.

  First, when the vehicular auxiliary power supply apparatus 100 is used as a jump starter, the jumper booster cable 120 is connected to the user as shown in FIG. 4 with the power switch 41 of the vehicular auxiliary power supply apparatus 100 turned off. Is connected to the first DC output terminal 31 and to the electrode terminal of the in-vehicle battery 200.

  Thereby, the user can confirm that the power switch 41 is in an OFF state by turning off all of the plurality of LEDs of the charge amount display unit 51.

  Next, when the user presses the power switch 41 to turn on the power, the control circuit unit 4 of the vehicle auxiliary power supply apparatus 100 detects the power on and controls the operation of the charge amount display unit 51, and the charge amount display unit 51. Is lit in green. The charge amount display unit 51 functions as a power lamp that displays power ON when lit in green.

  Then, when the user presses the jump start switch 42 in the power-on state and starts jumping, the control circuit unit 4 of the auxiliary power feeding apparatus 100 for vehicle detects the jump start due to the short-time operation of the jump start switch 42, and jump start mode Control.

  In the control of the jump start mode, the control circuit unit 4 can normally detect the voltage of the on-vehicle battery 200 of the automobile that jumps to the first DC output terminal 31 for jump start via the booster cable 120. The operation of the output circuit unit 3 is controlled, and the lithium ion storage battery 2 is connected to the first DC output terminal 31 for jump start via the output circuit unit 3 as a power source for jump start. The operation is controlled, and the charge amount display unit 51 is turned on in yellow. The charge amount display unit 51 functions as a jump start lamp that displays a jump start by lighting in yellow. In this jump start mode, the charge amount display unit 51 displays the power ON when the green light is lit, and displays the jump start when the yellow light is lit.

  In the state of this jump start mode, the user can perform a jump start for starting an automobile engine equipped with the in-vehicle battery 200 to which the auxiliary power supply device for a vehicle 100 is connected.

  Further, the control circuit unit 4 determines the gate voltage of the second MOSFET 3a when the second detection unit 3b detects that the state of overcurrent and overdischarge is approaching during the jump start mode (during power supply). By controlling, the second MOSFET 3a quickly cuts off the current path between the lithium ion storage battery 2 and the first to fourth DC output terminals 31, 32, 33, 34, so that the auxiliary power feeding device 100 for the vehicle is used. Prevents overcurrent, reverse connection and overdischarge.

  At this time, when the second MOSFET 3a is provided between the lithium ion storage battery 2 and each of the first to fourth DC output terminals 31, 32, 33, 34, the control circuit unit 4 Only the current path between the lithium ion storage battery 2 and the first DC output terminal 31 may be quickly cut off by the second MOSFET 3a.

  In addition, when the user operates the jump start switch 42 for a long time, that is, for example, for a long time for 5 seconds or longer in the power ON state, the control circuit unit 4 enters the control state of the charge boost mode, and the electricity charged in the lithium ion storage battery 2 is The operation of the output circuit unit 3 is controlled so as to discharge at a time. In the control state of the charge boost mode, the operation of the charge amount display unit 51 is controlled, and the charge amount display unit 51 is turned on in yellow. That is, the charge amount display unit 51 functions as a charge boost mode in which the charge boost mode is displayed by turning on yellow. This charge boost mode is used when the in-vehicle battery 200 is in a deep discharge state.

  In addition to the first DC output terminal 31 for jump start, the auxiliary power feeding apparatus 100 for a vehicle has second to fourth DC output terminals 32 and 33 for external connection for using an electric device outdoors. , 34 can be used as a portable power source as follows.

  Specifically, in the control circuit unit 4, the PC power cable is externally connected to the second DC output terminal 32, and the PC is externally connected via the PC power cable. Then, the power ON is detected and the operation of the charge amount display unit 51 is controlled, the power amount display unit 51 is lit in green, the power ON is displayed, and the operation of the output circuit unit 3 is controlled to Power for driving the PC is supplied from the second DC output terminal 32 to the PC via the PC power cable.

  In addition, when the user presses the power switch 41 and turns on the power in a state where the USB cable is externally connected to the third DC output terminal 33 and the USB device is externally connected via the USB power cable, the control circuit unit 4 turns on the power. , Detecting the power ON, controlling the operation of the charge amount display unit 51, displaying the power ON with the charge amount display unit 51 in a green lighting state, and controlling the operation of the output circuit unit 3 to drive the DC 5V USB Power is supplied from the third DC output terminal 33 to the USB device via the USB power cable.

  The control circuit unit 4 is configured such that the first cigar plug cable or the second cigar plug cable is externally connected to the fourth DC output terminal 34 and the external device is externally connected via the cigar plug cable. When the user presses the power switch 41 to turn on the power, the power on is detected and the operation of the charge amount display unit 51 is controlled. The charge amount display unit 51 is lit in green to display power ON, and the output circuit unit 3 The power for driving the external device of DC 12V is supplied from the fourth DC output terminal 32 to the external device via the cigar plug cable.

  In other words, the auxiliary power supply device for a vehicle 100 functions as a portable power source that drives a vehicle-mounted electrical device via the first cigar cable externally connected to the fourth DC output terminal.

  The auxiliary power supply device for a vehicle 100 is a portable power source for backing up a vehicle memory corresponding to an OBD (On-Board Diagnostic system) system via a second cigar cable externally connected to the fourth DC output terminal. Function as.

  Here, an OBD (On-Board Diagnostic system) system is a self-diagnosis function performed by a computer mounted on a vehicle, and facilitates the functional inspection of the vehicle exhaust gas purification device in use. In OBD2, its inspection connector, communication protocol, failure diagnosis code, and the like are standardized.

  In a vehicle equipped with an OBD (On-Board Diagnostic system) system, various diagnostic history information is stored in the memory, and the memory is not lost when the on-board battery 200 is replaced. It is necessary to supply backup power.

  In other words, the auxiliary power supply device for a vehicle 100 has a function as a jump starter, and furthermore, an information device such as a battery-driven notebook PC and its ancillary devices, and an in-vehicle electric device that can be used by connecting to a cigar socket. Portable power supply for vehicle memory backup that has a function as a portable power supply that enables the use of mobile phones and portable music players that can be powered by USB, and that is compatible with the On-Board Diagnostic system (OBD) system Thus, the auxiliary power supply device 100 for a vehicle that is compact, lightweight, excellent in portability, and easy to use is provided.

  Furthermore, when the control circuit unit 4 is used as a portable power source as described above, the second detection unit 3b detects that the overcurrent and overdischarge states are approaching, and thus the second MOSFET 3a. And the second MOSFET 3a quickly cuts off the current path between the lithium ion storage battery 2 and the first to fourth DC output terminals 31, 32, 33, and 34. The auxiliary power feeding device 100 is prevented from becoming overcurrent, reverse connection, overdischarge, or the like.

  At this time, when the second MOSFET 3a is provided between the lithium ion storage battery 2 and each of the first to fourth DC output terminals 31, 32, 33, 34, the control circuit unit 4 Of the current path between the ion storage battery 2 and each of the first to fourth DC output terminals 31, 32, 33, 34, the second detection unit 3b detects that an overcurrent and overdischarge state has been approached. Only the current path may be quickly cut off by the second MOSFET 3a.

  Further, the auxiliary power feeding device 100 for a vehicle not only functions as a jump starter or a portable power source as described above, but also functions as a warning indicator lamp or an illumination lamp used in an emergency.

  That is, the control circuit unit 4 detects that the light select switch 43 is pressed in the power-on state, and controls the charge amount display unit 51 and the pair of emergency warning lamps 53A and 53B as follows.

  When the control circuit unit 4 detects that the light select switch 43 is pressed once, it turns on the red LED provided as the emergency warning lamp 53A as an emergency light, and the light select switch 43 is pressed twice. Is detected, the white LED provided as the emergency warning lamp 53B is turned on to function as a front light, and when the light select switch 43 is pressed three times, the pair of emergency warning lights 53A and 53B are alternately switched. That is, when the light select switch 43 is pressed four times, the pair of emergency warning lamps 53A and 53B are turned off. In addition, when the control circuit unit 4 detects that the light select switch 43 has been pressed and held for 3 seconds or longer, the control circuit unit 4 drives the charge amount display unit 51 to turn on the light according to the charge amount of the in-vehicle battery 200.

  Further, the control circuit unit 4 controls the operation of the pair of side illumination lamps 54A and 54B according to the pressing operation of the sidelight on / off switch 44, and the sidelight on / off switch 44 is pressed. When this is detected, the pair of side illumination lamps 54A and 54B is turned on, and when it is detected that the sidelight on / off switch 44 is pressed again, the pair of side illumination lamps 54A and 54B is turned off.

  As described above, the vehicular auxiliary power supply device 100 to which the present invention is applied supplies power to the in-vehicle battery 200 via the booster cable electrically connected to the in-vehicle battery 200 when the in-vehicle battery 200 of the vehicle rises. Protect the vehicle auxiliary power supply device that has at least a function as a jump starter that starts and jumps by starting the engine of the vehicle so that it does not fall into an abnormal state such as overcharge, overcurrent, reverse connection and overdischarge. As a protection circuit for this purpose, the first MOSFET 1a and the second MOSFET 3a are used in place of the conventionally used relay circuit.

  And the control circuit part 4 of the auxiliary power supply apparatus 100 for vehicles to which this invention is applied is detected by the 1st detection part 1b that any one of the lithium ion storage batteries 2 has approached abnormal states, such as overcharge and overcurrent. In such a case, the gate voltage of the first MOSFET 1a is controlled, and the current path between the DC input terminal 20 and the lithium ion storage battery 2 is quickly cut off by the first MOSFET 1a, whereby the auxiliary power feeding device 100 for a vehicle is used. Can be prevented from becoming abnormal states such as overcharge, overcurrent and reverse connection.

  Furthermore, the control circuit unit 4 of the auxiliary power supply device for a vehicle 100 to which the present invention is applied detects that the second detection unit 3b has approached an abnormal state such as overcurrent and overdischarge. By controlling the gate voltage and quickly cutting off the current path between the lithium ion storage battery 2 and the first to fourth DC output terminals 31, 32, 33, 34 by the second MOSFET 3a, It is possible to prevent the auxiliary power supply apparatus 100 from being in an abnormal state such as overcurrent, reverse connection, and overdischarge.

  Further, as described above, the auxiliary power supply device for a vehicle 100 to which the present invention is applied uses a first MOSFET 1a and a second MOSFET 3a in place of a conventionally used relay circuit, thereby providing a relay circuit as a protection circuit. The reaction time for current disconnection can be shortened as compared with the conventional method using. Specifically, the response time of current disconnection of a conventional auxiliary power feeding device for a vehicle that used a relay circuit as a protection circuit was about 0.8 seconds, whereas for a vehicle to which the present invention is applied. The current disconnection reaction time of the auxiliary power supply apparatus 100 is 0.8 seconds or less, for example, about 0.001 seconds. Therefore, the vehicle auxiliary power supply apparatus 100 to which the present invention is applied can perform current disconnection more quickly than the conventional case where a relay circuit is used as a protection circuit, and can reliably perform overcharge, overcurrent, reverse connection and An abnormal state such as overdischarge can be prevented.

  Furthermore, as described above, the auxiliary power supply device for a vehicle 100 to which the present invention is applied uses a first MOSFET 1a and a second MOSFET 3a as a protection circuit, instead of the relay circuit, thereby providing a relay circuit as the protection circuit. The area (volume) of the circuit unit (housing 10) can be made smaller than the conventional one, and the overall size can be reduced.

DESCRIPTION OF SYMBOLS 1 Charging circuit part, 1a 1st MOSFET, 1b 1st detection part, 2 Lithium ion storage battery, 3 Output circuit part, 3a 2nd MOSFET, 3b 2nd detection part, 4 Control circuit part, 10 housing | casing, 11 left side wall, 12 right side wall, 13 front wall, 20 DC input terminal, 31 first DC output terminal, 32 second DC output terminal, 33 third DC output terminal, 34 fourth DC output terminal, 41 Power switch, 42 Jump start switch, 43 Light select switch, 44 Side light on / off switch, 51 Charge amount indicator, 52 Battery low indicator, 53A, 53B Emergency warning light, 54A, 54B Side light, 100 Auxiliary Power Supply Device for Vehicle, 120 Booster Cable, 200 Car Battery

Claims (3)

An auxiliary power supply device for a vehicle having at least a function as a jump starter for supplying a power to the in-vehicle battery via a booster cable and starting a vehicle engine when the in-vehicle battery of the vehicle rises. And
A housing,
An input terminal installed on the side wall of the housing, to which a charging cable is externally connected;
A charging circuit unit installed in the housing and internally connected to the input terminal;
A lithium ion storage battery installed in the housing and internally connected to the charging circuit unit;
An output circuit unit installed in the housing and internally connected to the lithium ion storage battery;
A control circuit unit installed in the housing and controlling the operation of the charging circuit unit and the output circuit unit;
Installed on the side wall of the housing, internally connected to the output circuit unit, and provided with an output terminal for jump start to which the booster cable is externally connected,
The charging circuit unit is connected in series to a current path between the input terminal and the lithium ion storage battery, and is connected between the first MOSFET for conducting or blocking the current path, and between the input terminal and the control circuit unit. And a first detection unit that detects an abnormality of the auxiliary power supply device for a vehicle,
The output circuit unit is connected in series to a current path between the lithium ion storage battery and the output terminal, and is connected between the second MOSFET for conducting or blocking the current path, and between the output terminal and the control circuit unit. And a second detection unit that detects an abnormality of the auxiliary power supply device for a vehicle,
The control circuit unit controls the gate voltage of the first MOSFET when the first detection unit detects that the vehicle auxiliary power supply device is approaching an abnormal state, and controls the gate voltage of the first MOSFET by the first MOSFET. The current path between the input terminal and the lithium ion storage battery is interrupted, and when the second detection unit detects that the auxiliary power supply for a vehicle is in an abnormal state, the second MOSFET An auxiliary power feeding device for a vehicle, wherein a gate voltage is controlled and a current path between the lithium ion storage battery and the output terminal is interrupted by the second MOSFET.   The control circuit unit controls the gate voltage of the first MOSFET when the first detection unit detects that the state is approaching an overcurrent state, and the first MOSFET The current path to the lithium ion storage battery is cut off in 0.8 seconds or less, and the gate voltage of the second MOSFET is controlled when the second detection unit detects that the state is approaching an overcurrent state. The vehicle auxiliary power feeding apparatus according to claim 1, wherein the second MOSFET blocks a current path between the lithium ion storage battery and the output terminal in 0.8 seconds or less.   The control circuit unit controls the gate voltage of the first MOSFET when the first detection unit detects that the state of overcharge and overcurrent is approaching, and the first MOSFET The current path between the input terminal and the lithium ion storage battery is interrupted, and when the second detection unit detects that an overcurrent and overdischarge state is approaching, the gate voltage of the second MOSFET is controlled. The vehicle auxiliary power feeding apparatus according to claim 1, wherein the second MOSFET cuts off a current path between the lithium ion storage battery and the output terminal.

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