Sub-battery charging device

Abstract

To provide a sub-battery charger which can be used by using various power sources.SOLUTION: A sub-battery charger 10 comprises: a first relay 16 and a second relay 18, which are connected to an alternator 44 to which a main battery 42 being a power source of an engine 40 of a camping car is connected; and a control part 12 for switching connection of the alternator 44 and the first relay 16 or the second relay 18 in accordance with a type of a sub-battery 14. When the alternator 44 is connected with the second relay 18, the sub-battery 14 is charged from the alternator 44 through a step-up / step-down part 20, and when the engine 40 stops, the sub-battery 14 is charged from at least one of a charging stand 50, an AC power source 52 or a photovoltaic power generation part 54.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a sub-battery charging device that charges a sub-battery in a vehicle equipped with a main battery and a sub-battery. [Background technology]

[0002] In recent years, campervans, which are vehicles equipped with a living space, have come into widespread use. This type of campervan is equipped with a main battery used to drive the vehicle and a sub-battery used as a power source for electrical devices in the living space.

[0003] A camper equipped with solar panels is known as a technology capable of charging the sub-battery (Patent Document 1).

[0004] This camper is equipped with a solar panel on the top surface of the vehicle body, and the solar panel charges the sub-battery. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Utility Model Registration No. 3223373 Summary of the Invention [Problem to be solved by the invention]

[0006] However, when charging the sub-battery with a solar panel as in Patent Document 1, the charging is easily affected by weather, making it difficult to charge the sub-battery stably.

[0007] The present invention has been made in consideration of the above problems, and has an object to provide a sub-battery charging device capable of charging a sub-battery with a plurality of power sources. [Means for solving the problem]

[0008] The sub-battery charging device according to the present invention includes a first relay and a second relay connected to an alternator to which a main battery, which is a power source for an engine of a camper, is connected; A detection unit for detecting a voltage of the sub-battery, a control unit that switches a connection between the alternator and the first relay or the second relay according to a type of a sub-battery; a charging unit that detects the voltage of the sub-battery, the charging unit including a step-up / step-down unit that is connected to the second relay and that steps up / down an output voltage from the alternator, a rapid charging unit that rapid-charges the sub-battery, and a normal charging unit that normally charges the sub-battery; Equipped with When the engine is running, if the detection unit detects that the voltage of the sub-battery is 24 V, it transmits a detection signal to the first relay, and the first relay that has received the detection signal turns on a switch, and the power generated by the alternator is supplied to the sub-battery via the first relay, and the sub-battery is charged. When the detection unit detects that the voltage of the sub-battery is 12 V, it transmits a detection signal to the second relay, and the second relay that has received the detection signal turns on a switch, and the power generated by the alternator is stepped down by the step-up / step-down unit via the second relay and supplied to the sub-battery, and the sub-battery is charged. When the battery is charged and the detection unit detects that the voltage of the sub-battery is 48V, it transmits a detection signal to the second relay, and the second relay that receives the detection signal turns on its switch, and the power generated by the alternator is boosted by the voltage boost / buck unit via the second relay and supplied to the sub-battery, and when the sub-battery is charged and the engine is stopped, the sub-battery is rapid-charged by the rapid charging unit when the charging unit detects that the voltage of the sub-battery is 24V, and the sub-battery is normally charged by the normal charging unit when the charging unit detects that the voltage of the sub-battery is 48V. It is characterized by the above.

[0009] In the sub-battery charging device, the sub-battery is connected to a charging stand via the charging unit. Continued It is characterized by the above.

[0010] In the sub-battery charging device, The first relay and the second relay are switches that operate in conjunction with the operating state of the engine, and are turned on when the engine starts and turned off when the engine stops. It is characterized by: Effect of the Invention

[0012] According to the sub-battery charging device of the present invention, the sub-battery can be charged by a plurality of power sources. [Brief description of the drawings]

[0013] [Figure 1] 1 is an explanatory diagram of a sub-battery charging system 100 according to an embodiment of the present invention. [Diagram 2] FIG. 2A is an explanatory diagram of a control unit, and FIG. 2B is an explanatory diagram of a charging unit. [Diagram 3] 4 is an explanatory diagram of an operation procedure of the sub-battery charging system when the engine is running. FIG. [Figure 4] 4 is an explanatory diagram of an operation procedure of the sub-battery charging system when the engine is stopped. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] <Configuration of sub-battery charging system 100> Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Fig. 1 is an explanatory diagram of a sub-battery charging system 100 according to an embodiment of the present invention, Fig. 2A is an explanatory diagram of a control unit 12, and Fig. 2B is an explanatory diagram of a charging unit 22.

[0015] The sub-battery charging system 100 includes a sub-battery charging device 10, an engine 40, a main battery 42, an alternator 44, a fuse 46, a charging stand 50, an AC power source 52, and a solar power generation unit 54.

[0016] The sub-battery charging device 10 includes a control unit 12, a sub-battery 14, a first relay 16, a second relay 18, a step-up / step-down unit 20, a charging unit 22, and an MPPT (Maximum Power Point Tracking) unit 24.

[0017] The control unit 12 is a means for switching the connection between the alternator 44 and the first relay 16 or the second relay 18 depending on the type of the sub-battery 14. The control unit 12 has a detection unit 26 and a switching unit 28. The detection unit 26 is a means for detecting the type of battery from the voltage of the sub-battery 14. The switching unit 28 is a means for transmitting and controlling a control signal for switching between the first relay 16 and the second relay 18.

[0018] The sub-battery 14 is a rechargeable battery and is a power source used for electrical equipment used in the living space of a vehicle such as a camper, for example, household appliances such as lighting, air conditioners, electric stoves, microwave ovens, televisions, rice cookers, etc. The sub-battery 14 is a rechargeable battery with a voltage of, for example, 12V, 24V, or 48V.

[0019] The first relay 16 and the second relay 18 are switches that operate in conjunction with the operating state of the engine 40. They are turned ON when the engine 40 starts, and turned OFF when the engine 40 stops. The voltage step-up / step-down unit 20 is a means for stepping up and stepping down the output voltage from the alternator 44. The voltage step-up / step-down unit 20 is connected to the second relay 18.

[0020] The charging unit 22 is a means for charging the sub-battery 14 based on the output voltage from the charging stand 50. The charging unit 22 has an AC charging unit 30, a normal charging unit 32, and a rapid charging unit 34. The AC charging unit 30 is a charging unit powered by a single-phase 100V AC power source. The normal charging unit 32 is a charging unit powered by a three-phase 100V or 200V AC power source. The rapid charging unit 34 is a charging unit powered by a three-phase 200V power source.

[0021] The MPPT unit 24 is a control means that outputs a current at an output voltage that optimizes the power generated by the solar power generation unit 54 .

[0022] The engine 40 is an engine mounted on a vehicle such as a camper. The main battery 42 is a lead battery and is a power source for driving the engine 40. The alternator 44 is a three-phase AC generator and is driven by the engine 40. The voltage of the generated power is 24 V. The fuse 46 is provided between the main battery 42 and the first relay 16 or the second relay 18.

[0023] The charging station 50 is a charging means for charging an electric vehicle. There are two types of charging stations 50: normal charging and rapid charging. The AC power source 52 is a single-phase AC power source. The solar power generation unit 54 is a means for generating power based on a solar panel. The solar panel is provided on the vehicle.

[0024] <Operation of the sub-battery charging system 100> Next, the operation of the sub-battery charging system 100 will be described with reference to Figures 3 and 4. Figure 3 is an explanatory diagram of the operation procedure of the sub-battery charging system 100 when the engine 40 is running, and Figure 4 is an explanatory diagram of the operation procedure of the sub-battery charging system 100 when the engine 40 is stopped.

[0025] First, the case where the engine 40 is running will be described.

[0026] The detection unit 26 of the control unit 12 detects the voltage of the connected sub-battery 14 (step S1). When the detection unit 26 detects that the voltage of the sub-battery 14 is 24 V, it transmits a detection signal to the first relay 16 (step S2).

[0027] The first relay 16 receives the detection signal and switches the switch to the ON state (step S3). The power generated by the alternator 44 is supplied via the fuse 46 and the first relay 16, and the sub-battery 14 is charged (step S4). In step S2, the switch of the second relay 18 is in the OFF state.

[0028] On the other hand, when the detection unit 26 detects that the voltage of the sub-battery 14 is 12 V or 48 V, it transmits a detection signal to the second relay 18 (step S5).

[0029] The second relay 18 receives the detection signal and turns the switch ON (step S6). The power generated by the alternator 44 is boosted or stepped down by the step-up / step-down unit 20 via the fuse 46 and the second relay 18 (step S7), and the sub-battery 14 is charged by the boosted or stepped-down power (step S8).

[0030] In step S6, the switch of the first relay 16 is in the OFF state. When the detection unit 26 detects that the voltage of the sub-battery 14 is 12 V, the power generated by the alternator 44 is stepped down by the step-up / step-down unit 20. On the other hand, when the detection unit 26 detects that the voltage of the sub-battery 14 is 48 V, the power generated by the alternator 44 is stepped up by the step-up / step-down unit 20.

[0031] Next, charging of the sub-battery 14 at the charging station 50 when the engine 40 is stopped will be described.

[0032] The charging unit 22 detects the voltage of the connected sub-battery 14 (step S11). When the charging unit 22 detects that the voltage of the sub-battery 14 is 24 V, the charging unit 22 causes the rapid charging unit 34 to rapidly charge the sub-battery 14 (step S12).

[0033] On the other hand, when the charging unit 22 detects that the voltage of the sub-battery 14 is 48 V, the normal charging unit 32 rapidly charges the sub-battery 14 (step S13).

[0034] When the sub-battery 14 is charged by the AC power supply 52, power is supplied to the sub-battery 14 via the AC charging unit 30 of the charging unit 22. When the sub-battery 14 is charged by the solar power generation unit 54, power is supplied to the sub-battery 14 via the MPPT (Maximum Power Point Tracking) unit 24.

[0035] The charged sub-battery 14 supplies power to the electrical devices.

[0036] The sub-battery charging device 10 comprises a first relay 16 and a second relay 18 which connect to an alternator 44 connected to a main battery 42, which is the power source for the engine 40 of the camper van, and a control unit 12 which switches the connection between the alternator 44 and the first relay 16 or the second relay 18 depending on the type of sub-battery 14. When the alternator 44 is connected to the second relay 18, the sub-battery 14 is charged from the alternator 44 via the step-up / step-down unit 20, and when the engine 40 is stopped, the sub-battery 14 is charged from at least one of a charging stand 50, an AC power source 52, or a solar power generation unit 54.

[0037] According to the sub-battery charging device 10, the sub-battery 14 can be charged by a plurality of power sources.

[0038] In the sub-battery charging device 10, the sub-battery 14 is connected to the charging stand 50 via a charging unit 22, and the charging unit 22 charges the sub-battery 14 according to the type of the sub-battery 14.

[0039] In the sub-battery charging device 10, when the voltage of the sub-battery 14 is 12 V or 48 V, the alternator 44 is connected to the second relay 18, and the sub-battery 14 is charged from the alternator 44 via the step-up / step-down unit 20.

[0040] In the sub-battery charging device 10, the charging unit 22 charges the sub-battery 14 by normal charging when the voltage of the sub-battery 14 is 24V, and charges the sub-battery 14 by rapid charging when the voltage of the sub-battery 14 is 48V.

[0041] It should be noted that the present invention is not limited to the above-described embodiment, and various configurations can be adopted without departing from the gist of the present invention. [Explanation of symbols]

[0042] 10...Sub-battery charging device 12...Control section 14…Sub battery 16…1st Relay 18…Second Relay 20…Boost / buck section 22...Charging part 24...MPPT (Maximum Power Point Tracking) section 26…Detection unit 28…Switching section 30…AC charging part 32…Normal charging part 34...Quick charging section 40…Engine 42…Main battery 44…Alternator 46…Fuse 50…Charging station 52…AC power supply 54…Solar power generation section 100…Sub-battery charging system

Claims

1. a first relay and a second relay connected to an alternator to which a main battery serving as a power source for the engine of the camper is connected; a control unit that detects a voltage of a sub-battery and switches a connection between the alternator and the first relay or the second relay according to a type of the sub-battery; a step-up / step-down unit connected to the second relay and configured to step up / step down an output voltage from the alternator; a charging unit that detects a voltage of the sub-battery, the charging unit having a rapid charging unit that rapidly charges the sub-battery and a normal charging unit that normally charges the sub-battery; Equipped with When the engine is running, When the detection unit detects that the voltage of the sub-battery is 24 V, the detection unit transmits a detection signal to the first relay; The first relay that receives the detection signal turns on a switch, and the power generated by the alternator is supplied to the sub-battery via the first relay, and the sub-battery is charged. When the detection unit detects that the voltage of the sub-battery is 12 V, the detection unit transmits a detection signal to the second relay; The second relay that has received the detection signal turns on a switch, and the power generated by the alternator is stepped down by the step-up / step-down unit via the second relay and supplied to the sub-battery, thereby charging the sub-battery. When the detection unit detects that the voltage of the sub-battery is 48 V, the detection unit transmits a detection signal to the second relay; The second relay that has received the detection signal turns on a switch, and the power generated by the alternator is boosted by the step-up / step-down unit via the second relay and supplied to the sub-battery, thereby charging the sub-battery. If the engine is stopped, When the charging unit detects that the voltage of the sub-battery is 24 V, the sub-battery is rapidly charged by the rapid charging unit, When the charging unit detects that the voltage of the sub-battery is 48 V, the sub-battery is normally charged by the normal charging unit. A sub-battery charging device.

2. 2. The sub-battery charging device according to claim 1, A sub-battery charging device, characterized in that the sub-battery is connected to a charging stand via the charging unit.

3. 3. The sub-battery charging device according to claim 1, The first relay and the second relay are switches that operate in conjunction with the operating state of the engine, and are turned on when the engine starts and turned off when the engine stops. A sub-battery charging device.

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