JP5454781B2 - Lead-acid battery charger - Google Patents

Lead-acid battery charger Download PDF

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JP5454781B2
JP5454781B2 JP2010006341A JP2010006341A JP5454781B2 JP 5454781 B2 JP5454781 B2 JP 5454781B2 JP 2010006341 A JP2010006341 A JP 2010006341A JP 2010006341 A JP2010006341 A JP 2010006341A JP 5454781 B2 JP5454781 B2 JP 5454781B2
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lead
current
coil
half
acid battery
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JP2011147278A (en
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修三 西野
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株式会社ダイフク
株式会社コンテック
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage
    • Y02E60/12Battery technologies with an indirect contribution to GHG emissions mitigation

Description

  The present invention relates to a lead-acid battery charging device, and more particularly to a charging device for charging a lead-acid battery mounted on a moving body from an induction line.

An example of a conventional method for charging a lead storage battery is disclosed in Patent Document 1.
The charging method for the lead-acid battery disclosed in Patent Document 1 is as follows: “In the rapid charging method with a relatively large constant current of 1.0 C or more, the battery voltage is equal to or higher than the gas generation voltage before charging a sufficient amount of charge. The purpose of this method is to eliminate the problem that oxygen gas and hydrogen gas are generated to cause deterioration of the life characteristics as well as the charging efficiency. during the energization time T 1, charging the lead storage battery, for a predetermined stop time T 2, a pulse charging to stop charging of the lead-acid battery, the current supply time T 1, 0.005 second or more 0.1 in the range of less than a second, and the stoppage time T 2 is set to less than 0.1 seconds, which satisfies the energization time T 1 and said stop time T 2, T 1 ≦ T 2 ≦ 3T 1 the relationship It is set as follows. The above-mentioned pulse is a document cited as an exception to the loss of novelty in Patent Document 1 ("Electric Vehicle" in "National Institute of Electrical Engineers Annual Meeting 4" published on February 10, 1999 by the National Congress of the Institute of Electrical Engineers of Japan. According to the pulse charging characteristics of the control valve type lead battery for use "), it is disclosed as a complete square wave.

According to this charging method, in a state where the charging has progressed to some extent, during energization, the voltage rapidly increases due to the polarization component and exceeds the gas generation voltage, and gas generation occurs from the electrode, resulting in a decrease in charging efficiency. By shortening T 1 and the stop time T 2 , it is possible to suppress the voltage increase due to the polarization component and to charge the battery efficiently.

Japanese Patent No. 4068268

However, in the conventional method for charging a lead storage battery disclosed in Patent Document 1, how to specifically apply a pulse defined by the energization time T 1 and the stop time T 2 with a constant current of 1.0 C or more. The charging device is not disclosed as to whether it is generated. That is, for example, if 1C of a lead storage battery is set to 30A, 30A or more (1.0C or more), for example, a current of 50A flows in a range of 0.005 seconds or more and less than 0.1 seconds, and 0.1 seconds. A charging device that generates a pulse of a complete square wave that stops less than a short circuit has a very complicated circuit configuration, and is actually difficult to implement with an inexpensive device, resulting in a very expensive device.

In addition, there are a plurality of types (rated) of lead-acid batteries having different rated currents, and it is desired that the charging current of the lead-acid battery can be easily adjusted according to these types.
SUMMARY OF THE INVENTION An object of the present invention is to provide a lead-acid battery charging device that can realize a pulse charging method with a simple device configuration and can easily adjust a charging current.

In order to achieve the above-mentioned object, the invention according to claim 1 of the present invention is a charging device for charging a lead storage battery using a commercial power source,
A half-wave rectifier for half-wave rectifying an alternating current supplied from the commercial power supply; a high-frequency generating circuit for converting an output current half-wave rectified by the half-wave rectifier into a high-frequency current having a predetermined frequency; An induction coil to which the high-frequency current is supplied from a generation circuit; a receiving coil that is arranged opposite to the induction coil and in which an electromotive force is induced by a magnetic flux generated in the induction coil; and is connected in parallel to the receiving coil; with the power receiving coil and a resonance capacitor that forms a resonant circuit at the predetermined frequency, the output current before Symbol co-oscillating circuit and full-wave rectification, and is characterized in further comprising a full wave rectifier supplied to the lead-acid battery.

According to the above configuration, since there is no smoothing circuit between the half-wave rectifier and the high-frequency generation circuit, a half cycle is provided from the high-frequency generation circuit to the induction coil every half cycle of the frequency of the commercial power supply. A high frequency current having a predetermined frequency having an envelope of the current waveform of the current is supplied, and an electromotive force having a predetermined frequency having an envelope of the current waveform of a half cycle of the frequency of the commercial power supply is induced in the power receiving coil. The output current of the (resonant circuit including the coil and the resonance capacitor connected in parallel with the coil) increases or decreases in proportion to the induced electromotive force regardless of the magnitude of the load, and the peak current is suppressed. Subsequently, full-wave rectification is performed by the full-wave rectifier, so that the waveform of the output current of the full-wave rectifier becomes a waveform with a half cycle every half cycle of the frequency of the commercial power supply. Charging is executed in a cycle, and charging is not executed in the next half cycle, and a pulse charging method using a mountain current that is a half wave but not a constant current is realized. With this pulse charging method, the lead storage battery can be rapidly charged, and the life of the lead storage battery can be reliably extended.

The invention described in claim 2 is the invention described in claim 1, characterized in that the lead-acid battery is charged from the full-wave rectifier through a DC choke.
According to the above configuration, the high-frequency output current of the full-wave rectifier continues to flow due to the action of the DC choke, so that the waveform of the current output to the lead-acid battery is the same as that of the commercial power supply with a smooth high-frequency waveform envelope. A half-cycle waveform is generated, and noise generation is prevented.

  The invention according to claim 3 is the invention according to claim 1 or 2, wherein an insulating transformer is disposed between the resonance circuit and the full-wave rectifier, and the primary winding of the insulating transformer is provided. The current supplied to the lead storage battery is set according to the winding ratio of the wire and the secondary winding.

  According to the said structure, the optimal electric current for the pulse charge of a lead storage battery is realizable with the winding ratio of an insulation transformer. In addition, since the input is a high frequency, an insulating transformer having a small size (size) can be used.

  The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein the lead coil is supplied to the lead storage battery by varying a distance between the induction coil and the power receiving coil. The current to be varied is variable.

  According to the above configuration, the electromotive force induced in the power receiving coil changes according to the change in the interval between the induction coil and the power receiving coil, thereby changing the output current generated from the parallel resonant circuit, thereby The charging current to the storage battery is variable. Therefore, by adjusting the interval, the peak current and the average current can be adjusted according to the capacity (rated) of the lead storage battery.

  The charging device of the lead storage battery of the present invention has no smoothing circuit between the half-wave rectifier and the high-frequency generator circuit, so that through the high-frequency generator circuit, the induction coil, the power receiving coil, the parallel resonant circuit, and the full-wave rectifier, A lead-acid battery is charged at a half-cycle of the commercial frequency and not charged in the next half-cycle by supplying a current having a waveform with a half-cycle for each half-cycle of the frequency of the commercial power supply to the lead-acid battery. It can be charged by a pulse charging method using a mountain current that is half-wave but not a constant current. Therefore, with a simple circuit configuration, a lead-acid battery can be rapidly charged, and the life of the lead-acid battery can be extended. Has the effect of.

1 is a basic circuit diagram of a lead-acid battery charging device in an embodiment of the present invention. It is a characteristic view of the charging device of the lead acid battery. It is a detailed circuit diagram of the charging device of the lead acid battery. It is a characteristic view of the high frequency generation circuit of the charging device of the lead acid battery. It is a figure which shows the induction coil and receiving coil of the charging device of the lead acid battery, (a) is a perspective view, (b) is a principal part block diagram of the ferrite member which comprises an induction coil and a receiving coil.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[Basic circuit]
FIG. 1 is a basic circuit diagram of a lead-acid battery charging device according to an embodiment of the present invention.

  As shown in FIG. 1, the lead-acid battery charging device 10 is a device that is fed from a commercial power source 11 and charges the lead-acid battery 12, and includes a power supply input terminal 20, a half-wave rectifier 21, a high-frequency generation circuit 22, The induction coil 23, the power receiving coil 24, the resonance capacitor 25, the insulating transformer 26, the full wave rectifier 27, the DC choke 28, and the charging output terminal 29 are configured.

That is, the lead-acid battery charging device 10 is:
A feed input terminal 20 connected to an AC commercial power supply 11;
A half-wave rectifier 21 for half-wave rectifying the alternating current fed from the commercial power supply 11 via the feed input terminal 20 into a direct current and supplying the half-wave rectified direct current;
A high-frequency generating circuit 22 that converts the output current half-wave rectified by the half-wave rectifier 21 into a high-frequency current of a predetermined frequency and outputs it;
An induction coil 23 to which the high-frequency current is supplied from a high-frequency generation circuit 22;
Opposing to the induction coil 23, the gap is adjustable, and a receiving coil 24 in which an electromotive force is induced by a magnetic flux generated in the induction coil 23,
A resonant capacitor 25 connected in parallel to the power receiving coil 24 and forming a parallel resonant circuit at the predetermined frequency together with the power receiving coil 24;
Both ends of the primary winding are connected to both ends of the resonance capacitor 25, and an insulating transformer (for example, 3.0 C) for setting a charging current (for example, 3.0 C) to be supplied to the lead storage battery 12 according to a winding ratio of the primary winding to the secondary winding. High frequency transformer) 26,
A full-wave rectifier 27 connected to both ends of the secondary winding of the isolation transformer 26 for full-wave rectification of the output current of the isolation transformer 26;
A DC choke 28 having one end connected to the positive output terminal of the full-wave rectifier 27;
One plus output terminal is connected to the other end of the DC choke 28, and the other minus output terminal is constituted by a charge output terminal 29 connected to the minus output terminal of the full-wave rectifier 27.

A positive electrode of the lead storage battery 12 is connected to the positive output terminal of the charging output terminal 29, and a negative electrode of the lead storage battery 12 is connected to the negative output terminal of the charging output terminal 29.
The effect | action by the circuit structure of the said charging device 10 is demonstrated referring the characteristic view shown in FIG.

  Before starting charging, for example, a lead storage battery 12 to be charged with 1.0 C of 30 A is connected to the charging output terminal 29, and the induction coil 23 and the receiving coil 24 are matched to the rated current of the connected lead storage battery 12. Adjust the gap between. The electromotive force induced in the receiving coil 24 is adjusted by the gap between the induction coil 23 and the receiving coil 24, and the current output from the parallel resonance circuit (depending on the induced electromotive force, regardless of the magnitude of the load). The current that increases or decreases) is adjusted. For example, when a current to be supplied to the lead storage battery 12 having a constant gap of 1.0 C is set to 30 A by the winding ratio of the primary winding and the secondary winding of the insulating transformer 26 {for example, 3.0 C = When set to 90 A} When 1.0 C of the lead storage battery 12 to be charged is smaller than 30 A, the gap is widened, and when larger than 30 A, the gap is narrowed.

Then, the commercial power supply 11 is connected to the power supply input terminal 20.
1. When the commercial power supply 11 is connected to the power supply input terminal 20 of the charging device 10, an alternating current is supplied to the half-wave rectifier 21, and a direct current that is half-wave rectified by the half-wave rectifier 21 is supplied to the high-frequency generation circuit 22. .

  2. The high frequency generation circuit 22 generates a high frequency current having a predetermined frequency (for example, 10 kHz) having a half cycle waveform as an envelope at every half cycle of the frequency of the commercial power supply 11 and outputs the high frequency current to the induction coil 23. To do.

  3. Due to the magnetic flux generated by the induction coil 23, an electromotive force of the predetermined frequency having an envelope of a half cycle waveform of the frequency of the commercial power supply 11 is induced in the power receiving coil 24, and an output current of the parallel resonance circuit is induced. Increases or decreases in proportion to the electromotive force. At this time, due to the action of the parallel resonant circuit, the output current of the parallel resonant circuit increases or decreases regardless of the size of the load, and the output current is prevented from becoming extremely large by reducing the load, and even if the load changes Thus, charging can be continued with a half-wave current, and the peak current of the output current of the parallel resonant circuit can be suppressed. Therefore, the current charged in the lead storage battery 12 can be set to an optimum current, and can be charged with a target current.

4). The current output from the parallel resonance circuit is converted into a current (for example, 3.0 C) supplied to the lead storage battery 12 by the insulation transformer 26.
5. The current of a predetermined frequency is full-wave rectified by the full-wave rectifier 27, so that the waveform of the output current of the full-wave rectifier 27 is substantially the same as the voltage after the half-wave rectification of the half-wave rectifier 21. Is a high-frequency waveform (a waveform having a half cycle for each half cycle of the commercial frequency), and the current continues to flow through the DC choke 28, thereby converting the commercial frequency waveform into an envelope. The high-frequency current is smoothed to form a smooth half-cycle waveform, which is output to the charge output terminal 29.

  6). The lead-acid battery 12 is supplied with a half-wave current having a smooth waveform from the charging output terminal 29 every half cycle of the frequency of the commercial power supply. In the next half cycle, the charging current is zero. Since the lead storage battery 12 is not charged when the current is less than the predetermined current, the lead storage battery 12 is charged when the current value of the half-wave current exceeds the predetermined current. In other words, charging is performed in a half cycle of the commercial frequency where the peak current is suppressed, charging is not performed in the next half cycle, and a pulse charging method using a mountain current that is a half wave but not a constant current. 12 is charged.

  As described above, according to the present embodiment, since there is no smoothing circuit between the half-wave rectifier 21 and the high-frequency generation circuit 22, the high-frequency generation circuit 22, the induction coil 23, the receiving coil 24, and the resonant capacitor 25. The lead-acid battery 12 is supplied with a waveform having a half-cycle for every half-cycle of the frequency of the commercial power supply 11 via the isolation transformer 26 and the full-wave rectifier 27. Charging is performed in a cycle, and charging of the lead storage battery 12 can be performed by a pulse charging method using a half-wave but non-constant current with a half-cycle waveform of a commercial frequency. With the circuit configuration, the lead storage battery 12 can be rapidly charged, and the life of the lead storage battery 12 can be extended.

In addition, according to the present embodiment, a smooth half-cycle waveform half-wave current can be supplied to the lead storage battery 12 by the action of the DC choke 28, and the generation of noise can be avoided.
In addition, according to the present embodiment, the insulating transformer 26 can supply a charging current (for example, 90 A in peak current) in conformity with the rated current of the lead storage battery 12 to be charged.

  Further, according to the present embodiment, by using the insulating transformer 26 in a non-contact manner, the charging device 10 that generates a pulse with a large current of 50 A or 100 A can have a simple circuit configuration and can be insulated. The transformer 26 can be an inexpensive high-frequency transformer having a small size (size) because the input is a high frequency, and further, since there is no smoothing circuit between the half-wave rectifier 21 and the high-frequency generating circuit 22, a smoothing capacitor is unnecessary. Therefore, the charging device 10 can be realized with a simple circuit configuration, high efficiency, small size, and low cost.

  In addition, according to the present embodiment, when a lead storage battery 12 having a rated current different from that of the lead storage battery 12 to be charged set in the insulating transformer 26 is to be charged, the gap between the induction coil 23 and the power receiving coil 24. By adjusting the value, it is possible to supply an optimum charging current. That is, by adjusting the gap, it is possible to adjust to the optimum peak current and average current in accordance with the capacity (rated) of the lead storage battery 12.

In addition, although this Embodiment makes the lead storage battery 12 the main charging object, it cannot be overemphasized that a pulse charge system is applicable to a storage battery effective as charging.
[Detailed circuit]
A specific circuit configuration of the high frequency generation circuit 22 is shown in FIG. The high frequency generation circuit 22 of FIG. 3 forms a self-excited push-pull circuit, and does not require driving circuits for transistors 39 and 40, which will be described later.

The high frequency generation circuit 22
A DC choke 31 having one end connected to the positive output terminal 21a of the half-wave rectifier 21 and supplied with a direct current from the half-wave rectifier 21;
A primary coil 33 with a center tap having a center tap 23 a connected to the other end of the DC choke 31, a secondary coil 34 connected to the induction coil 23, and a center having a center tap 35 a connected to the negative output terminal 21 b of the rectifier 21. An insulating transformer 36 comprising a tapped tertiary coil 35;
A resonant capacitor 37 connected in parallel to both ends of the secondary coil 34 and forming a resonant circuit with the induction coil 23 at a predetermined frequency;
A first transistor 39 connected between one end 33b of the center coil 33 with the center tap and a negative output terminal 21b of the rectifier 21;
A second transistor 40 connected between the other end 33c of the primary coil 33 with the center tap and the negative output terminal 21b of the rectifier 21;
A first constant current diode 41 whose anode is connected to the other end 33c of the center coil with the center tap 33 and has a constant current of, for example, 10 mA;
A first Zener diode 43 having a cathode connected to the cathode of the first constant current diode 41 and the gate of the first transistor 39, and an anode connected to the negative output terminal 21b of the rectifier 21;
A second constant current diode 42 whose anode is connected to one end 33b of the primary coil 33 with a center tap, for example, having a constant current of 10 mA;
A second Zener diode 44 having a cathode connected to the cathode of the second constant current diode 42 and the gate of the second transistor 40, and an anode connected to the negative output terminal 21b of the half-wave rectifier 21;
A first switching diode 45 having an anode connected to the cathode of the first constant current diode 41 and a cathode connected to the other end 33c of the primary coil 33 with the center tap;
A second switching diode 46 having an anode connected to the cathode of the second constant current diode 42 and a cathode connected to one end 33b of the primary coil 33 with the center tap;
A first drive circuit 47 for supplying charge to the gate of the first transistor 39;
A second drive circuit 48 for supplying charge to the gate of the second transistor 40;
A first advance circuit 49 for rapidly supplying charge to the gate of the first transistor 39;
A second advance circuit 50 for rapidly supplying charge to the gate of the second transistor 40;
It consists of cooling fins (not shown) for air cooling in which these components are arranged.

  The winding ratio of the primary coil 33 with the center tap of the insulation transformer 36, the secondary coil 34, and the tertiary coil 35 with the center tap is such that when the voltage across the primary coil 33 with the center tap is 200V AC, the secondary coil 34 Is set to be, for example, 48 V so that the voltage across the AC coil 480 V and the center coil with the center tap 35 is greatly stepped down.

  The first constant current diode 41 and the first Zener diode 43 constitute a first start-up circuit 51 that applies a voltage to the gate of the first transistor 39 to turn on the first transistor 39. In addition, the second constant current diode 42 and the second Zener diode 44 apply a voltage to the gate of the second transistor 40 to turn on the second transistor 40 (a conduction state). It is configured.

The first drive circuit 47 includes:
A first transfer resistor 57 having one end connected to one end 35b of the tertiary coil 35 with the center tap;
The anode is connected to the other end of the first transfer resistor 57, and the cathode is composed of a first transfer diode 58 connected to the cathode of the first constant current diode 41 and the gate of the first transistor 39,
The second drive circuit 48 includes:
A second transfer resistor 59 having one end connected to the other end of the tertiary coil 25 with the center tap;
The anode is connected to the other end of the second transfer resistor 59, and the cathode is composed of a second transfer diode 60 connected to the cathode of the second constant current diode 42 and the gate of the second transistor 40.

Further, the first advance circuit 49 includes:
A first advance resistor 61 having one end connected to one end 35b of the tertiary coil 35 with the center tap;
A first lead capacitor 62 having one end connected to the other end of the first lead resistor 61;
A first lead diode 63 having an anode connected to the other end of the first lead capacitor 62 and a cathode connected to the cathode of the first constant current diode 41 and the gate of the first transistor 39;
A first resistor 64 connected between the anode of the first lead diode 63 and the negative output terminal 21b of the rectifier 21;
Consisting of
The second advance circuit 50 includes:
A second lead resistor 65 having one end connected to the other end 35c of the tertiary coil 35 with the center tap;
A second lead capacitor 66 having one end connected to the other end of the second lead resistor 65;
A second lead diode 67 having an anode connected to the other end of the second lead capacitor 66 and a cathode connected to the cathode of the second constant current diode 42 and the gate of the second transistor 40;
The second resistor 68 is connected between the anode of the second lead diode 67 and the negative output terminal 21 b of the rectifier 21.

  The induction coil 23 is wound around a ferrite core member forming a magnetic core to constitute a power feeding unit 69, and the power receiving coil 24 is wound around a ferrite core member forming a magnetic core to constitute a power receiving unit 69. Yes.

As shown in FIG.
A first ferrite 72 having a U-shaped side surface formed by a combination of flat ferrite core members 71a, 71c, 71d;
A second ferrite 73 arranged opposite to the first ferrite 72 and having a U-shaped side surface formed by a combination of flat ferrite core members 71a, 71c, 71d;
Ferrites 72a and 72b located on the bottoms of the ferrites 72c and 72d, which are formed by a flat ferrite core member 71b and which form the convexes on both sides of the first ferrite 72, and the convexes on both sides of the second ferrite 73, respectively. Third ferrites 74 (74a, 74b) for coupling between the ferrites 73a, 73b respectively located at the bottoms of the ferrites 73c, 73d forming the portions;
The dielectric coil 23a wound around the ferrites 72c and 72d forming the convex portions on both sides of the first ferrite 72;
The induction coil 23b wound around the ferrites 73c and 73d, which are connected in series with the dielectric coil 23a and have respective convex portions on both sides of the second ferrite 73 so as to be opposite in polarity to the dielectric coil 23a;
An aluminum floor material 75 that supports the first ferrite 72 and the second ferrite 73 is formed. The induction coil 23 is formed by the dielectric coil 23a and the induction coil 23b.

With the configuration of the power supply unit 69, when power is supplied to the induction coils 23a and 23b, magnetic flux is generated, and the magnetic flux path is as shown in FIG.
Ferrite 72b on the other side of the first ferrite 72-Ferrite 72a on the one side of the first ferrite 72-Ferrite 72c on one side of the first ferrite 72-Projection on the other side of the first ferrite 72 Ferrite 72d of the second ferrite 72b of the other side of the first ferrite 72,
Ferrite 72a on one side of the first ferrite 72-Ferrite 72c on one side of the first ferrite 72-Ferrite 73c on one side of the second ferrite 73-Bottom on one side of the second ferrite 73 Ferrite 73a-third ferrite 74a-ferrite 72a at the bottom of one side of the first ferrite 72;
Ferrite 73a on the bottom of one side of the second ferrite 73-ferrite 73b on the other side of the second ferrite 73-ferrite 73d on the other side of the second ferrite 73-projection on the one side of the second ferrite 73 Ferrite 73c of the second ferrite 73a on one side of the second ferrite,
Ferrite 73b on the other side of the second ferrite 73-ferrite 73d on the other side of the second ferrite 73-ferrite 72d on the other side of the first ferrite 72-bottom on the other side of the first ferrite 72 The ferrite 72b, the third ferrite 74b, and the ferrite 73b on the other side of the second ferrite 73 are formed in four ways, and the magnetic flux flying from the power supply unit 69 to the power receiving unit 70 is maximized by these four magnetic flux paths. Power transmission efficiency can be improved.

In addition, as shown in FIG.
A first ferrite 82 having a U-shaped side surface constituted by a combination of ferrite core members 81a, 81c, 81d on a flat plate;
A second ferrite 83 arranged opposite to the first ferrite 82 and having a U-shaped side surface formed by a combination of ferrite core members 81a, 81c, 81d on a flat plate;
Each of the convex portions on both sides of the ferrites 82a and 82b and the second ferrite 83 is formed by a flat ferrite core member 81b and located on the bottoms of the ferrites 82c and 82d forming the convex portions on both sides of the first ferrite 82. A third ferrite 84 (84a, 84b) that couples the ferrite 83a, 83b respectively located at the bottom of the ferrite 83c, 83d to be formed;
A power receiving coil 24a wound around ferrites 82c and 82d forming the convex portions on both sides of the first ferrite 82;
A power receiving coil 24b wound around ferrites 83c and 83d that are connected in parallel to the power receiving coil 24a and have respective convex portions on both sides of the second ferrite 83 so as to have a polarity opposite to that of the power receiving coil 24a;
An aluminum floor material 85 that supports the first ferrite 82 and the second ferrite 83 is formed. The power receiving coil 24 is formed by the power receiving coil 24a and the power receiving coil 24b.

  As shown in FIG. 5, the power receiving unit 70 (the power receiving coil 24) has four ferrite core members 81 arranged at the tips of the convex portions of the power receiving unit 70 at the tips of the four convex portions of the power supply unit 69. It arrange | positions so that the arranged ferrite core member 71 may be opposed.

The operation of the detailed circuit configuration will be described with reference to FIG.
1. When charging device 10 is connected to commercial power supply 11, an alternating current is supplied to half-wave rectifier 21, and a direct current rectified by half-end rectifier 21 is supplied to DC choke 31 of high-frequency generation circuit 22. In this state, both the first transistor 39 and the second transistor 40 are in an off (non-conducting) state.

  2. The direct current supplied to the DC choke 31 has a difference in easiness of current flow due to variations in characteristics of the first transistor 39 and the second transistor 40 even if the component ratings are the same. Here, a current flows from the other end 33c of the primary coil 33 with the center tap to the first Zener diode 43 through the first constant current diode 41, and the gate voltage of the first transistor 39 becomes equal to or higher than the threshold voltage. It is assumed that the transistor 39 is first turned on (conductive) (the gate of the first transistor 29 in FIG. 4 is turned on).

When the first transistor 39 is turned on (conductive), a current flows from one end 33 b of the primary coil 33 to the first transistor 39 and the negative output terminal 21 b of the rectifier 21.
Then, since the voltage at the connection point between the one end 33b of the primary coil 33 with the center tap and the collector of the first transistor 39 becomes substantially 0V, the electric charge at the gate of the second transistor 40 passes through the second switching diode 46 to the center. The second transistor 40 is completely turned off (non-conducting) and discharged to the connection point between one end of the tapped primary coil and the collector of the first transistor 39, and the gate voltage of the second transistor 40 exceeds the threshold voltage. There is nothing.

  3. Further, at this time, an electromotive force is generated in the tertiary coil 35 due to the magnetic flux generated in the primary coil 33 due to the current flowing from the one end 33b of the primary coil 33 to the first transistor 39 and the negative output terminal 21b of the rectifier 21. On the contrary, an induced current in the direction opposite to the current flowing through the primary coil 33 flows, and this induced current flows from the other end 35c of the tertiary coil 35 to the second advance resistor 65, the second advance capacitor 66, and the second resistor 68. , Flows through the center tap 35a of the tertiary coil 35, forms a second closed loop, and charges are stored in the second advance capacitor 66. At the same time, the second advance resistor 65 and the second advance capacitor are connected from the other end 35c of the tertiary coil 35. 66, the second lead diode 67, and the second switching diode 46, the first end 33b of the primary coil 33 with the center tap and the first One end 33b of the primary coil 33 with the center tap flows from the other end 35c of the tertiary coil 35 through the second transfer resistor 59, the second transfer diode 60, and the second switching diode 46 from the other end 35c of the tertiary coil 35. And the gate voltage of the second transistor 40 does not exceed the threshold voltage.

  4). Next, the current of the first transistor 39 that flows through the primary coil 33 with the center tap supplies current to the resonant capacitor 37 and the induction coil 23 (23a, 23b) through the secondary coil 34, and the resonant capacitor 37 and the induction coil 23 are supplied. Starts to resonate at a predetermined frequency, and the voltage across the secondary coil 34 reverses after a certain time, so that the voltage at the other end 33c of the primary coil 33 with the center tap becomes higher than the voltage at the one end 33b. Lower.

  5. Then, the charge of the gate of the first transistor 39 flows to the first switching diode 41 and the other end 33c of the primary coil 33. When the gate voltage of the first transistor 39 falls below the threshold voltage, the first transistor 39 is turned off ( At the same time, the charge stored in the second lead capacitor 66 of the second closed loop suddenly flows to the gate of the second transistor 40 via the second lead diode 67, and at the same time, the second lead It flows with the gate of the second transistor 40 via the transfer resistor 59 and the second transfer diode 60, the gate voltage of the second transistor 40 rapidly becomes equal to or higher than the threshold voltage, and the second transistor 40 is turned on (conductive). (The gate of the second transistor 30 shown in FIG. 4 is on).

When the second transistor 40 is turned on (conductive), current flows from the other end 33 c of the primary coil 33 to the second transistor 40 and the negative output terminal 21 b of the rectifier 21.
Then, since the voltage at the connection point between the other end 33C of the primary coil 33 with the center tap and the collector of the second transistor 40 becomes approximately 0V, the charge of the gate of the first transistor 39 passes through the first switching diode 45 to the center. The current flows to the connection point between the other end 33C of the tapped primary coil 33 and the collector of the second transistor 40 and is discharged, the first transistor 39 is completely turned off (non-conducting), and the gate voltage of the first transistor 39 becomes the threshold value. Never exceed the voltage.

  6). Further, at this time, an electromotive force is generated in the tertiary coil 35 by the magnetic flux generated in the primary coil 33 due to the current flowing from the other end 33c of the primary coil 33 to the second transistor 40 and the negative output terminal 21b of the rectifier 21. Therefore, an induced current in a direction opposite to the current flowing in the primary coil 33 flows, and this induced current flows from one end 35b of the tertiary coil 35 to the first advance resistor 61, the first advance capacitor 62, and the first resistor 64. , Flows through the center tap 35a of the tertiary coil 35, forms a first closed loop, and charges are stored in the first advance capacitor 62. At the same time, the first advance resistor 61 and the first advance capacitor 62 are connected from one end 35b of the tertiary coil 35. The second end 33C of the primary coil 33 with the center tap is connected to the second leading diode 63 and the first switching diode 41 with the second The other end 33C of the center tap-equipped primary coil 33 flows from the one end 35b of the tertiary coil 35 through the first transfer resistor 57, the first transfer diode 58, and the first switching diode 41. And the gate voltage of the first transistor 39 does not exceed the threshold voltage.

  7). Next, the current of the second transistor 40 that flows through the primary coil 33 with the center tap supplies the current to the resonance capacitor 37 and the induction coil 23 (23a, 23b) through the secondary coil 34, and the resonance capacitor 37 and the induction coil 23 are supplied. Resonates at a predetermined frequency, and the voltage at both ends of the secondary coil 34 reverses after a certain time, so that the voltage at one end 33b of the primary coil 33 with the center tap becomes lower than the voltage at the other end 33c. .

  8). Then, the charge of the gate of the second transistor 40 flows to the second switching diode 46 and the one end 33b of the primary coil 33. When the gate voltage of the second transistor 40 falls below the threshold voltage, the second transistor 40 is turned off (non- At the same time, the charge stored in the first lead capacitor 62 of the first closed loop suddenly flows to the gate of the first transistor 39 via the first lead diode 63, and at the same time, It flows with the gate of the first transistor 39 via the transfer resistor 57 and the first transfer diode 58, the gate voltage of the first transistor 39 rapidly becomes equal to or higher than the threshold voltage, and the first transistor 39 is turned on (conductive). .

Oscillation occurs by repeating the above operation.
In this way, the first transistor 39 and the second transistor 40 are alternately turned on (conductive), and the direction of the current flowing through the primary coil 33 is reversed each time.

  9. Along with this, reverse current flows alternately through the secondary coil 34, and the resonance circuit 37 and the induction coil 23 (23a, 23b) have the best resonance frequency (for example, 12 kHz). Since the current flows well, the first transistor 39 and the second transistor 40 are alternately shifted by 180 ° at the resonance frequency. That is, self-oscillation occurs at the resonance frequency of the circuit including the resonance capacitor 37 and the induction coil 23, and an alternating current having this resonance frequency is supplied to the induction coil 23. As shown in FIG. The voltage of the resonance frequency which makes the waveform of the half wave voltage output from 21 an envelope is generated.

Thus, power can be supplied from the commercial power supply 11 to the induction coil 23 without providing an AC / DC converter that causes power loss, and power transmission efficiency can be improved.
10. In the power reception unit 70 facing the power supply unit 69, a large electromotive force is generated in the power reception coil 24 that resonates with the frequency of the induction coil 23 due to the magnetic flux generated in the induction coil 23.

  This electromotive force causes an alternating current to flow in the primary winding of the insulating transformer 26 connected in parallel to the power receiving coil 24, and the secondary winding of the insulating transformer 26 is based on the ratio of the number of windings to the voltage generated in the primary winding. A stepped-down voltage is generated, and an increased alternating current flows. This alternating current is supplied to the full-wave rectifier 27, and the direct current rectified by the full-wave rectifier 27 flows to the lead storage battery 12 through the DC choke 28, and the lead storage battery 12 is charged.

  At this time, as described above, the half-cycle waveform of the commercial frequency to be paused is substantially the same as the voltage after the half-wave rectification of the half-wave rectifier 21, while the lead storage battery 12 is charged only when the current is equal to or higher than a certain current. Is not executed, and charging with the half cycle of the commercial frequency makes the charging of the lead storage battery 12 a pulse charging. In this way, by using a pulse charging method with a mountain current that is a half wave but not a constant current, the lead storage battery 12 can be rapidly charged and the life of the lead storage battery 12 can be extended.

  According to the configuration of such a detailed circuit, the first startup circuit 51, the second startup circuit 52, the first drive circuit 47, the second drive circuit 48, the first By the action of the first advance circuit 49 and the second advance circuit 50, the first transistor 39 or the second transistor 40 is stably and alternately driven without delay so that an alternating current flows through the secondary coil 34 at a predetermined frequency. Therefore, the possibility that the first transistor 39 and the second transistor 40 are simultaneously turned off (non-conducting) is reduced, the stability of the switching operation can be ensured, and the power transmission efficiency can be improved. it can.

DESCRIPTION OF SYMBOLS 10 Charging device 11 Commercial power supply 12 Lead acid battery 21 Half wave rectifier 22 High frequency generating circuit 23 Inductive coil 24 Power receiving coil 25 Resonant capacitor 26 Insulation transformer 27 Full wave rectifier 28 DC choke

Claims (4)

  1. A charging device for charging a lead-acid battery using a commercial power source,
    A half-wave rectifier for half-wave rectifying an alternating current supplied from the commercial power supply;
    A high-frequency generating circuit for converting the output current half-wave rectified by the half-wave rectifier into a high-frequency current of a predetermined frequency and outputting it;
    An induction coil to which the high-frequency current is supplied from the high-frequency generation circuit;
    A power receiving coil disposed opposite to the induction coil and in which an electromotive force is induced by a magnetic flux generated in the induction coil;
    A resonance capacitor connected in parallel to the power reception coil and forming a resonance circuit at the predetermined frequency together with the power reception coil;
    Full-wave rectifying the output current before Symbol co-oscillating circuit, the charging device of a lead-acid battery, characterized in that it comprises a full-wave rectifier supplied to the lead-acid battery.
  2. The lead-acid battery charging device according to claim 1, wherein the lead-acid battery is charged from the full-wave rectifier via a DC choke.
  3. An insulating transformer is disposed between the resonant circuit and the full-wave rectifier, and a current supplied to the lead storage battery is set according to a winding ratio of a primary winding and a secondary winding of the insulating transformer. The lead-acid battery charging device according to claim 1 or 2.
  4. The lead-acid battery charging device according to any one of claims 1 to 3, wherein a current supplied to the lead-acid battery is varied by varying a distance between the induction coil and the power-receiving coil. .
JP2010006341A 2010-01-15 2010-01-15 Lead-acid battery charger Active JP5454781B2 (en)

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JP2018519780A (en) * 2016-02-05 2018-07-19 グァンドン オッポ モバイル テレコミュニケーションズ コーポレーション リミテッド Adapter and charge control method
KR101906977B1 (en) * 2016-02-05 2018-10-11 광동 오포 모바일 텔레커뮤니케이션즈 코포레이션 리미티드 Charge mehtod, adapter and mobile terminal

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US9641223B2 (en) * 2012-03-26 2017-05-02 Semiconductor Enegry Laboratory Co., Ltd. Power receiving device and power feeding system
JP6089330B2 (en) * 2012-08-10 2017-03-08 パナソニックIpマネジメント株式会社 Small electric device and non-contact power transmission device having the same
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KR101906977B1 (en) * 2016-02-05 2018-10-11 광동 오포 모바일 텔레커뮤니케이션즈 코포레이션 리미티드 Charge mehtod, adapter and mobile terminal
US10291060B2 (en) 2016-02-05 2019-05-14 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Adapter and charging control method
US10320225B2 (en) 2016-02-05 2019-06-11 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Charging system and charging method for increasing service life of battery of terminal and power adapter thereof
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US10348119B2 (en) 2016-02-05 2019-07-09 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Adapter and method for charging control
US10381860B2 (en) 2016-02-05 2019-08-13 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Adapter and charging control method
US10389164B2 (en) 2016-02-05 2019-08-20 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Charging system, protection method for preventing from impact of surge voltage and power adapter
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US10461568B2 (en) 2016-02-05 2019-10-29 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Charging system, charging method, and power adapter

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