CN111819752A - Battery charging/discharging circuit, electronic device, musical instrument, and battery charging/discharging method - Google Patents
Battery charging/discharging circuit, electronic device, musical instrument, and battery charging/discharging method Download PDFInfo
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- CN111819752A CN111819752A CN201880090790.3A CN201880090790A CN111819752A CN 111819752 A CN111819752 A CN 111819752A CN 201880090790 A CN201880090790 A CN 201880090790A CN 111819752 A CN111819752 A CN 111819752A
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- 238000007599 discharging Methods 0.000 title claims abstract description 85
- 238000000034 method Methods 0.000 title claims description 20
- 238000010586 diagram Methods 0.000 description 14
- 238000001514 detection method Methods 0.000 description 11
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- 101100186114 Arabidopsis thaliana NAC037 gene Proteins 0.000 description 4
- 101100079120 Arabidopsis thaliana NAC076 gene Proteins 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
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- 238000005516 engineering process Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 229910052987 metal hydride Inorganic materials 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 1
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
- G10H1/00—Details of electrophonic musical instruments
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
Abstract
The battery charging/discharging circuit includes: a charging circuit unit capable of charging a plurality of 2-time batteries in parallel and individually; a series connection switch unit that connects the plurality of 2-time batteries in series and supplies dc power from the plurality of 2-time batteries connected in series to the load unit; a charging operation switch unit that supplies external power, which is direct current power supplied from the outside, to the load unit and the charging circuit unit, and operates the charging circuit unit; and a switching circuit unit that detects whether or not external power is supplied, and when external power is detected, releases the series connection of the series connection switch unit, and sets the charging operation switch unit to a state in which external power is supplied to the load unit and the charging circuit unit.
Description
Technical Field
The invention relates to a battery charging and discharging circuit, an electronic device, a musical instrument and a battery charging and discharging method.
Background
In recent years, a technique has been known in which 2 batteries are connected in parallel during charging and 2 batteries are connected in series during discharging (see, for example, patent documents 1 and 2).
Patent document 1: japanese patent No. 4075260
Patent document 2: japanese patent laid-open No. 2008-148287
Disclosure of Invention
However, in the above-described conventional technology, a complicated control circuit is required to connect the 2-time batteries in parallel or in series, and it is difficult to automatically switch the connection of the 2-time batteries with a simple configuration.
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a battery charging/discharging circuit, an electronic device, a musical instrument, and a battery charging/discharging method, which can automatically switch connection of a battery 2 times between charging and discharging with a simple configuration.
In order to solve the above problem, one embodiment of the present invention is a battery charging/discharging circuit including: a charging circuit unit capable of connecting a plurality of 2-time batteries in parallel and individually charging the batteries; a series connection switch unit that connects the plurality of 2-time batteries in series and supplies dc power from the plurality of 2-time batteries connected in series to a load unit; a charging operation switch unit that supplies external power, which is direct current power supplied from the outside, to the load unit and the charging circuit unit, and operates the charging circuit unit; and a switching circuit unit that detects whether or not the external power is supplied, and when the external power is detected, releases the series connection of the series connection switch unit, and sets the charging operation switch unit to a state in which the external power is supplied to the load unit and the charging circuit unit.
In the above battery charge/discharge circuit, the switching circuit unit may set the series connection switch unit to the series connection state when the external power is not detected.
In the above battery charge/discharge circuit, the charge operation switch unit may include a 1 st switch for setting the charge circuit unit to a floating state, and the switching circuit unit may operate the 1 st switch to set the charge circuit unit to the floating state when the external power is not detected.
In the above battery charge/discharge circuit, the charge operation switch unit may include a 2 nd switch for supplying the external power to the load unit, and the series connection switch unit may include: a 3 rd switch connecting the plurality of 2 nd-order batteries in series; and a 4 th switch that supplies the dc power from the plurality of 2-time batteries to the load unit, wherein the 2 nd switch and the 4 th switch are connected such that the body diode faces the load unit in a forward direction, and the 3 rd switch is connected such that the body diode and a current flowing toward the load unit when the plurality of 2-time batteries are connected in series flow in a reverse direction.
In the above battery charge/discharge circuit, the series connection switch unit may include a plurality of the 3 rd switches, and a lowermost switch among the plurality of the 3 rd switches, which is closest to the reference power supply line, may be an NMOS transistor.
Another embodiment of the present invention is an electronic device including: the battery charging and discharging circuit; and an electronic circuit that executes predetermined processing as the load unit.
Another aspect of the present invention is a musical instrument including: the battery charging and discharging circuit; and an electronic circuit that executes electronic processing of the musical instrument as the load section.
Another aspect of the present invention is a battery charging/discharging method, which is a battery charging/discharging circuit of a battery charging/discharging circuit, the battery charging/discharging circuit including: a charging circuit unit capable of connecting a plurality of 2-time batteries in parallel and individually charging the batteries; a series connection switch unit that connects the plurality of 2-time batteries in series and supplies dc power from the plurality of 2-time batteries connected in series to a load unit; and a charging operation switch unit that supplies external power, which is direct current power supplied from the outside, to the load unit and the charging circuit unit to operate the charging circuit unit, wherein whether or not the external power is supplied is detected, and when the external power is detected, the state of the series connection switch unit is released, and the charging operation switch unit is set to the state of supplying the external power to the load unit and the charging circuit unit.
ADVANTAGEOUS EFFECTS OF INVENTION
According to the present invention, the connection of the battery can be automatically switched 2 times at the time of charging and discharging with a simple configuration.
Drawings
Fig. 1 is a configuration diagram showing an example of a battery charging/discharging circuit according to embodiment 1.
Fig. 2 is a flowchart showing an example of the operation of the battery charging/discharging circuit according to embodiment 1.
Fig. 3 is a timing chart showing an example of the operation of the battery charging/discharging circuit according to embodiment 1.
Fig. 4 is a diagram illustrating a switching state in the case where external power is not supplied in embodiment 1.
Fig. 5 is a diagram illustrating a switching state in the case where external power is supplied in embodiment 1.
Fig. 6 is a configuration diagram showing an example of a battery charging/discharging circuit according to embodiment 2.
Fig. 7 is a configuration diagram showing an example of the battery charging/discharging circuit according to embodiment 3.
Fig. 8 is a configuration diagram showing an example of the battery charging/discharging circuit according to embodiment 4.
Fig. 9 is a configuration diagram showing an example of the battery charging/discharging circuit according to embodiment 5.
Fig. 10 is a block diagram showing an example of a musical instrument having a battery charging/discharging circuit.
Detailed Description
Next, a battery charge/discharge circuit and an electronic device according to an embodiment of the present invention will be described with reference to the drawings.
[ embodiment 1 ]
Fig. 1 is a configuration diagram showing an example of a battery charging/discharging circuit 1 according to embodiment 1.
As shown in fig. 1, the battery charging/discharging circuit 1 includes a charging circuit unit 20, a charging operation switch unit 30, a series connection switch unit 40, and a switching circuit unit 50. The electronic device 100 according to the present embodiment includes a battery charging/discharging circuit 1, a load unit 2, and a plurality of 2-time batteries 10. The electronic device 100 is a device that can operate using both the 2-time battery 10 such as a guitar amplifier and external power.
The 2-time battery 11, the 2-time battery 12, and the 2-time battery 13 have the same configuration, and when any 2-time battery included in the electronic device 100 is shown or when no particular distinction is made, the 2-time battery 10 will be described.
The secondary battery 10 is a chargeable and dischargeable battery such as a nickel metal hydride battery.
The load unit 2 is a load that consumes dc power output from the battery charging/discharging circuit 1, and is an electronic circuit that executes various processes (predetermined processes) of the electronic device 100. The load unit 2 is connected to an OUT terminal (output terminal) of the battery charging/discharging circuit 1.
The charging circuit unit 20 is configured to connect a plurality of (for example, 3 or more) 2-time batteries in parallel and to be individually chargeable. The charging circuit unit 20 includes a charging circuit 21, a charging circuit 22, and a charging circuit 23. In the present embodiment, the charging circuit 21, the charging circuit 22, and the charging circuit 23 have the same configuration.
The charging circuit 21 is connected to the secondary battery 11, and charges the secondary battery 11 when external power, which is dc power supplied from the outside, is supplied to the charging circuit unit 20. In the charging circuit 21, the VP terminal is connected to the positive terminal (positive terminal) of the secondary battery 11 2, and the VN terminal is connected to the negative terminal (negative terminal) of the secondary battery 11 2.
The charging circuit 22 is connected to the secondary battery 12, and charges the secondary battery 12 when external power is supplied to the charging circuit unit 20. In the charging circuit 22, the VP terminal is connected to the positive terminal of the secondary battery 12, and the VN terminal is connected to the negative terminal of the secondary battery 12.
The charging circuit 23 is connected to the secondary battery 13, and charges the secondary battery 13 when external power is supplied to the charging circuit unit 20. In the charging circuit 23, the VP terminal is connected to the positive terminal of the secondary battery 13 2, and the VN terminal is connected to the negative terminal of the secondary battery 13 2.
The charging circuit 21, the charging circuit 22, and the charging circuit 23 are each internally connected to the VSS terminal and the VN terminal via a low resistance or the like.
The charging operation switch unit 30 supplies external power to the load unit 2 and the charging circuit unit 20, and operates the charging circuit unit 20. The charging operation switch unit 30 supplies external power to the load unit 2 and the charging circuit unit 20 when external power is supplied to the battery charging/discharging circuit 1. In addition, the charging operation switch unit 30 sets the charging circuit 21 and the charging circuit 22 (a part of the charging circuit unit 20) in a floating state when external power is not supplied to the battery charging/discharging circuit 1. Here, the floating state refers to, for example, a non-grounded state or a state of being electrically disconnected. The charging operation switch unit 30 includes a switch 31, a switch 32, a switch 33, and a switch 34.
The switch 31 is connected between an IN terminal (power input terminal) and an OUT terminal (output terminal) and supplies external power to the load unit 2. The switch 31 is, for example, a P-channel MOSFET (Metal Oxide Semiconductor Field effect transistor, hereinafter sometimes referred to as a PMOS transistor). IN the switch 31, a source terminal is connected to an OUT terminal, a drain terminal is connected to an IN terminal, and a gate terminal (control terminal) is connected to a node N2 of a switching circuit section 50 described later.
The switch 31 has a body diode, which is a parasitic diode, and the switch 31 is connected so that the body diode is forward from the IN terminal to the OUT terminal (to the load unit 2).
The switch 32 is connected between the IN terminal and the VDD terminal of the charging circuit unit 20, and supplies external power to the charging circuit unit 20. The switch 32 is, for example, a PMOS transistor. IN the switch 32, a source terminal is connected to the VDD terminal of the charging circuit unit 20, a drain terminal is connected to the IN terminal, and a gate terminal is connected to a node N2 of the switching circuit unit 50 described later.
The switch 32 has a body diode, and the switch 32 is connected so that the body diode is forward from the IN terminal toward the VDD terminal of the charging circuit unit 20.
The switch 33 is connected between the GND terminal (reference potential terminal) and the VSS terminal of the charging circuit 21, and sets the charging circuit 21 in a floating state. The switch 33 is, for example, an N-channel MOSFET (hereinafter, sometimes referred to as an NMOS transistor). In the switch 33, a source terminal is connected to a GND terminal, a drain terminal is connected to a VSS terminal of the charging circuit 21, and a gate terminal is connected to a node N1 of the switching circuit section 50 described later.
The switch 34 is connected between the GND terminal and the VSS terminal of the charging circuit 22, and sets the charging circuit 22 in a floating state. The switch 34 is, for example, an NMOS transistor. In the switch 34, a source terminal is connected to a GND terminal, a drain terminal is connected to a VSS terminal of the charging circuit 22, and a gate terminal is connected to a node N1 of the switching circuit section 50 described later.
The switches 33 and 34 are the 1 st switches for setting the charging circuits 21 and 22 in a floating state. The switch 31 is a 2 nd switch for supplying external power to the load unit 2. That is, the charging operation switch unit 30 includes a 1 st switch for setting the charging circuit 21 and the charging circuit 22 in a floating state and a 2 nd switch for supplying external power to the load unit 2.
The VSS terminal of the charging circuit 23 is connected to the GND terminal without passing through a switch.
The series connection switch unit 40 connects the plurality of 2-time batteries 10 in series, and supplies dc power from the plurality of 2-time batteries 10 connected in series to the load unit 2. The series connection switch unit 40 includes a switch 41, a switch 42, and a switch 43.
The switch 41 is connected between the positive terminal and the OUT terminal of the 2-time battery 11, and supplies external power to the load unit 2 from the plurality of 2-time batteries 10 connected in series. The switch 41 is, for example, a PMOS transistor. In the switch 41, the source terminal is connected to the OUT terminal, the drain terminal is connected to the positive terminal of the secondary battery 11 2, and the gate terminal is connected to a node N1 of the switching circuit unit 50 described later.
The switch 41 has a body diode, and the switch 41 is connected so that the body diode is forward from the positive terminal of the secondary battery 11 toward the OUT terminal (toward the load unit 2).
The switch 42 is connected between the positive terminal of the 2-time battery 12 and the negative terminal of the 2-time battery 11, and connects the 2-time battery 11 and the 2-time battery 12 in series. The switch 42 is, for example, a PMOS transistor. In the switch 42, the source terminal is connected to the positive terminal of the secondary battery 12, the drain terminal is connected to the negative terminal of the secondary battery 11, and the gate terminal is connected to a node N1 of the switching circuit unit 50 described later.
The switch 42 has a body diode, and the switch 42 is connected such that the direction of the current flowing toward the load unit 2 when the secondary battery 11 and the secondary battery 12 are connected in series is opposite to the body diode. That is, when the charging circuit unit 20 charges the secondary battery 11 and the secondary battery 12 in parallel, the switch 42 is connected such that the body diode is in the opposite direction to the direction in which the secondary battery 11 and the secondary battery 12 are connected in series and the current is supplied, so that the current does not flow from the VP terminal of the charging circuit 22 to the VN terminal of the charging circuit 21.
The switch 43 is connected between the positive terminal of the 2-time battery 13 and the negative terminal of the 2-time battery 12, and connects the 2-time battery 12 and the 2-time battery 13 in series. The switch 43 is, for example, an NMOS transistor. In the switch 43, the source terminal is connected to the negative terminal of the secondary battery 2 12, the drain terminal is connected to the positive terminal of the secondary battery 2 13, and the gate terminal is connected to a node N2 of the switching circuit unit 50 described later.
The switch 43 has a body diode, and the switch 43 is connected such that the direction of the current flowing toward the load unit 2 when the secondary battery 12 and the secondary battery 13 are connected in series is opposite to the direction of the current flowing toward the load unit 2. That is, when the charging circuit unit 20 charges the secondary battery 12 and the secondary battery 13 in parallel, the switch 43 is connected such that the body diode is in the opposite direction to the direction in which the secondary battery 12 and the secondary battery 13 are connected in series and the current is supplied, so that the current does not flow from the VP terminal of the charging circuit 23 to the VN terminal of the charging circuit 22.
The switches 42 and 43 are the 3 rd switches that connect the plurality of 2-time cells 10 (the 2-time cell 11, the 2-time cell 12, and the 2-time cell 13) in series. The switch 41 is a 4 th switch for supplying dc power from the plurality of 2-time batteries 10 (the 2-time battery 11, the 2-time battery 12, and the 2-time battery 13) to the load unit 2. That is, the series connection switch unit 40 includes a 3 rd switch for connecting the plurality of 2-time batteries 10 in series and a 4 th switch for supplying dc power from the plurality of 2-time batteries 10 to the load unit 2.
The switching circuit unit 50 detects whether or not external power is supplied, and when external power is detected, releases the series connection of the series connection switch unit 40, and sets the charging operation switch unit 30 to a state in which external power is supplied to the load unit 2 and the charging circuit unit 20. When the external power is not detected, the switching circuit unit 50 sets the series connection switch unit 40 to the series connection state. When the external power is not detected, the switching circuit unit 50 sets the charging circuit 21 and the charging circuit 22 to the floating state.
The switching circuit unit 50 includes a resistor 51, a resistor 52, a resistor 53, and a switch 54.
The 1 st terminal of the resistor 51 is connected to the IN terminal, and the 2 nd terminal is connected to the node N1. Further, the 1 st terminal of the resistor 52 is connected to the node N1, and the 2 nd terminal is connected to the GND terminal. The resistor 51 and the resistor 52 are connected IN series between the IN terminal and the GND terminal.
The 1 st terminal of the resistor 53 is connected to the OUT terminal, and the 2 nd terminal is connected to the node N2.
The switch 54 is, for example, an NMOS transistor. In the switch 54, the source terminal is connected to the GND terminal, the drain terminal is connected to the node N2, and the gate terminal is connected to the node N1.
The resistor 53 and the switch 54 are connected in series between the OUT terminal and the GND terminal.
IN the switching circuit unit 50, when external power is not supplied to the IN terminal, the node N1 is IN the l (low) state, the switches 33 and 34 are IN the OFF (OFF) state (non-conducting state), and the charging circuits 21 and 22 are IN the floating state. In this case, the node N1 turns ON the switches 41 and 42, connects the secondary battery 11 and the secondary battery 12 in series, and supplies dc power from the secondary battery 11 to the load unit 2. In this case, the node N1 turns the switch 54 OFF.
When external power is supplied to the IN terminal, the node N1 increases the voltage to be IN an h (high) state, turns ON the switches 33 and 34, and releases the floating states of the charging circuits 21 and 22. In this case, the node N1 turns OFF the switches 41 and 42, separates the secondary battery 11 and the secondary battery 12, and stops the supply of dc power from the secondary battery 11 to the load unit 2. In this case, the node N1 turns the switch 54 ON.
IN the switching circuit unit 50, when the external power is not supplied to the IN terminal at the node N2, the switch 54 is turned OFF, and therefore, turned to the H state, the switch 31 and the switch 32 are turned OFF, and the supply of the external power to the load unit 2 and the charging circuit unit 20 is stopped. In this case, the node N2 turns the switch 43 ON, and connects the secondary 2 battery 12 and the secondary 2 battery 13 in series.
When external power is supplied to the IN terminal, the node N2 turns ON the switch 54 to lower the voltage to the L state, and the node N2 turns OFF the switch 43 to separate the secondary battery 12 from the secondary battery 13. In this case, the switch 31 and the switch 32 are turned ON to supply external power to the load unit 2 and the charging circuit unit 20. Thereby, the charging circuit unit 20 charges the battery 10 for each 2 times.
Further, the resistor 51 and the resistor 52 connected IN series between the IN terminal and the GND terminal described above are the 1 st switching circuit. The 1 st switching circuit detects whether or not external power is detected through a node N1 between the resistor 51 and the resistor 52, and controls each switch. Further, the resistor 53 and the switch 54 connected in series between the OUT terminal and the GND terminal described above are the 2 nd switching circuit. In the 2 nd switching circuit, the node N1 is connected to the control terminal of the switch 54, and each switch is controlled by the node N2 between the resistor 53 and the switch 54. The node N1 and the node N2 are configured to have inverted logic states.
Next, the battery charge/discharge circuit 1 according to the present embodiment will be described with reference to the drawings.
Fig. 2 is a flowchart showing an example of the operation of the battery charging/discharging circuit 1 according to the present embodiment.
In fig. 2, the switching circuit unit 50 of the battery charging/discharging circuit 1 first determines whether or not external power is supplied (step S101). When external power is supplied (YES in step S101), the switching circuit unit 50 sets the node N1 to the H state and the node N2 to the L state, and advances the process to step S102. When NO external power is supplied (step S101: NO), the switching circuit unit 50 brings the node N1 to the L state and the node N2 to the H state, and advances the process to step S103.
In step S102, the switching circuit unit 50 releases the series connection state of the series connection switch unit 40, and sets the charging operation switch unit 30 to a state in which external power is supplied to the load unit 2 and the charging circuit unit 20. After the process of step S102, the switching circuit unit 50 returns to step S101.
In step S103, the switching circuit unit 50 switches the series connection switch unit 40 to the series connection state and the charging operation switch unit 30 to set the charging circuit 21 and the charging circuit 22 to the floating state. After the process of step S103, the switching circuit unit 50 returns to step S101.
Next, the operation of the battery charge/discharge circuit 1 will be described in detail with reference to fig. 3 to 5.
Fig. 3 is a timing chart showing an example of the operation of the battery charging/discharging circuit 1 according to the present embodiment.
IN fig. 3, the vertical axis shows, IN order from the top, the voltage VIN of the IN terminal, the voltage VND1 of the node N1, the states (SW33 and SW34) of the switch 33 and the switch 34, the states (SW41 and SW42) of the switch 41 and the switch 42, the state SW54 of the switch 54, the voltage VND2 of the node N2, the states (SW31 and SW32) of the switch 31 and the switch 32, and the state SW43 of the switch 43. In addition, the horizontal axis shows time.
At time T0, external power is not supplied to the IN terminal, the voltage VND1 of the node N1 is IN the L state, and the switch 33, the switch 34, and the switch 54 are IN the OFF state (see SW33, SW34, and SW 54). The switches 41 and 42 are in the ON state (see SW41 and SW 42). When the switch 54 is turned OFF, the voltage VND2 at the node N2 is turned H, and the switches 31 and 32 are turned OFF (see SW31 and SW 32). The switch 43 is turned ON (see SW 43).
The state at time T0 is the state of each switch shown in fig. 4. As shown IN fig. 4, the battery charge/discharge circuit 1 connects the 2-time battery 11, the 2-time battery 12, and the 2-time battery 13 IN series when external power is not supplied to the IN terminal, and outputs dc power output from the 2-time battery 11, the 2-time battery 12, and the 2-time battery 13 connected IN series to the OUT terminal. In the battery charging/discharging circuit 1, the charging circuit 21 and the charging circuit 22 are in a floating state, and the charging circuit unit 20 is not operated.
Returning to the description of fig. 3, if external power (reference voltage VIN) is supplied to the IN terminal at time T1, the voltage VND1 at the node N1 of the battery charge/discharge circuit 1 is IN the H state, and the switches 33, 34, and 54 are IN the ON state (see SW33, SW34, and SW 54). The switches 41 and 42 are turned OFF (see SW41 and SW 42). When the switch 54 is turned ON, the voltage VND2 at the node N2 is turned L, and the switches 31 and 32 are turned ON (see SW31 and SW 32). The switch 43 is turned OFF (see SW 43).
The state at time T1 is the state of each switch shown in fig. 5. As shown IN fig. 5, when external power is supplied to the IN terminal, the battery charge/discharge circuit 1 releases the series connection of the sub-2 battery 11, the sub-2 battery 12, and the sub-2 battery 13, and outputs the external power supplied from the IN terminal to the OUT terminal. The battery charging/discharging circuit 1 supplies external power to the charging circuit unit 20, and operates the charging circuit unit 20. Thus, the charging circuit unit 20 charges the sub-2 batteries 11, the sub-2 batteries 12, and the sub-2 batteries 13 independently (individually).
Returning to the description of fig. 3, if the supply of the external power to the IN terminal (reference voltage VIN) is stopped at time T2, the voltage VND1 of the node N1 of the battery charge/discharge circuit 1 is IN the L state, and is again IN the same state as the above-described time T0.
IN fig. 3, the period from time T0 to time T1 and the period after time T2 correspond to the period IN which external power is not supplied to the IN terminal (discharge state ST1), and the period from time T1 to time T2 corresponds to the period IN which external power is supplied to the IN terminal (charge state ST 2).
As described above, the battery charging/discharging circuit 1 according to the present embodiment includes the charging circuit unit 20, the series connection switch unit 40, the charging operation switch unit 30, and the switching circuit unit 50. The charging circuit unit 20 can charge a plurality of 2-time batteries in parallel and individually. The series connection switch unit 40 connects the plurality of 2-time batteries in series, and supplies dc power from the plurality of 2-time batteries connected in series to the load unit 2. The charging operation switch unit 30 supplies external power, which is dc power supplied from the outside, to the load unit 2 and the charging circuit unit 20, and operates the charging circuit unit 20. The switching circuit unit 50 detects whether or not external power is supplied, and when external power is detected, releases the series connection of the series connection switch unit 40, and places the charging operation switch unit 30 in a state in which external power is supplied to the load unit 2 and the charging circuit unit 20. When the external power is not detected, the switching circuit unit 50 sets the series connection switch unit 40 to the series connection state.
Thus, in the battery charging/discharging circuit 1 according to the present embodiment, since the switching circuit unit 50 determines whether or not external power is supplied, and automatically switches between the charging state ST2 and the discharging state ST1, a complicated control circuit is not required. Thus, the battery charge/discharge circuit 1 according to the present embodiment can automatically switch the connection of the battery 10 between the charge and discharge operations 2 times with a simple configuration.
In the present embodiment, the charging operation switch unit 30 includes the 1 st switch (for example, the switch 33 and the switch 34) that sets the charging circuit 21 and the charging circuit 22 in a floating state. When the external power is not detected, the switching circuit unit 50 operates the 1 st switch to put the charging circuit unit 20 into a floating state.
Thus, the battery charge/discharge circuit 1 according to the present embodiment can disconnect the charging circuit unit 20 when the battery 10 is discharged 2 times, and can reduce power consumption of the charging circuit unit 20.
In the present embodiment, the charging operation switch unit 30 includes a 2 nd switch (for example, a switch 31) that supplies external power to the load unit 2. The series connection switch unit 40 includes a 3 rd switch (for example, switches 42 and 43) for connecting the plurality of 2-time batteries 10 in series and a 4 th switch (for example, switch 41) for supplying dc power from the plurality of 2-time batteries 10 to the load unit 2. The 2 nd switch and the 4 th switch are connected so that the body diode faces the load unit 2 in the forward direction. In addition, the 3 rd switch is connected such that the direction of the current flowing toward the load unit 2 is opposite to the direction of the current flowing toward the load unit 2 when the plurality of 2-time batteries 10 are connected in series.
Thus, since the body diodes of the 2 nd switch and the 4 th switch are connected so as to be forward directed to the load unit 2, the battery charge/discharge circuit 1 according to the present embodiment can always supply any one of the external power and the output power of the 2 nd-order battery 10 to the load unit 2. Further, since the body diode connection of the 3 rd switch is in the opposite direction to the direction of the current flowing toward the load unit 2 when the 2 nd-time batteries 10 are connected in series, when the 2 nd-time batteries 10 are disconnected from each other, the 1 st switch is turned ON and the negative terminal of the 2 nd-time batteries 10 is connected to the GND terminal via the VN terminal and the VSS terminal of the charging circuit unit 20, and therefore, it is possible to prevent the 2 nd-time batteries 10 from being electrically connected via the body diode. Thus, the battery charge/discharge circuit 1 according to the present embodiment can reliably supply power to the load unit 2 and appropriately switch the connection of the battery 102 times.
In the present embodiment, the series connection switch unit 40 includes a plurality of 3 rd switches. Among the plurality of 3 rd switches (for example, the switches 42 and 43), the lowest-stage switch (for example, the switch 43) closest to the power supply line (reference power supply line) of the GND terminal is an NMOS transistor.
Thus, in the battery charge/discharge circuit 1 according to the present embodiment, even when the voltage of the battery 10 decreases 2 times, the voltage obtained by adding the voltages of the plurality of batteries 10 for 2 times becomes the gate voltage of the NMOS transistor, and therefore, the plurality of batteries 10 for 2 times can be reliably connected in series.
In the present embodiment, the switching circuit unit 50 includes a 1 st switching circuit and a 2 nd switching circuit. The 1 st switching circuit includes a resistor 51 and a resistor 52 connected IN series between the IN terminal and the GND terminal, and controls the charging operation switch unit 30 and the series connection switch unit 40 by detecting whether or not external power is supplied through a node N1 (voltage) between the resistor 51 and the resistor 52. The 2 nd switching circuit has a resistor 53 and a switch 54 connected in series between an OUT terminal and a GND terminal, and a node N1 is connected to a control terminal of the switch 54. The 2 nd switching circuit controls the charging operation switch unit 30 and the series connection switch unit 40 by a node N2 (voltage) between the resistor 53 and the switch 54. The node N1 and the node N2 are configured to have inverted logic states.
Thus, the battery charging/discharging circuit 1 according to the present embodiment can automatically switch the connection of the battery 10 between the charging and discharging operations 2 times by a simple circuit including 3 resistance elements and 1 switch (switch 54).
In addition, since the battery charge/discharge circuit 1 according to the present embodiment can be configured without interposing a switch or a diode in the charge path (the path from the VP terminal to the 2 nd secondary battery 10 to the VN terminal) of the charge circuit unit 20, the inductance component and the impedance component of the charge path can be reduced. Therefore, the battery charge/discharge circuit 1 according to the present embodiment can improve the accuracy of monitoring the battery voltage when the battery 10 is rapidly charged 2 times.
The electronic device 100 according to the present embodiment includes the battery charging/discharging circuit 1 and an electronic circuit that executes predetermined processing as the load unit 2.
Thus, the electronic device 100 according to the present embodiment achieves the same effects as the above-described battery charging/discharging circuit 1, and can automatically switch the connection of the battery 10 between the charging and discharging 2 times with a simple configuration.
The battery charging/discharging method according to the present embodiment is a battery charging/discharging method for a battery charging/discharging circuit 1 including the above-described charging circuit unit 20, the series connection switch unit 40, and the charging operation switch unit 30, and includes a detection step, a 1 st switching step, and a 2 nd switching step. In the detection step, the switching circuit unit 50 detects whether or not external power is supplied. In the 1 st switching step, when detecting the external power, the switching circuit unit 50 releases the series connection of the series connection switch unit 40 and sets the charging operation switch unit 30 to a state of supplying the external power to the load unit 2 and the charging circuit unit 20. In the 2 nd switching step, the switching circuit unit 50 sets the series connection switch unit 40 to the series connection state when the external power is not detected.
Thus, the battery charging/discharging method according to the present embodiment achieves the same effects as those of the battery charging/discharging circuit 1 described above, and can automatically switch the connection of the battery 10 between the charging and discharging 2 times with a simple configuration.
[ 2 nd embodiment ]
Next, the battery charge/discharge circuit 1a and the electronic device 100a according to embodiment 2 will be described with reference to fig. 6.
Fig. 6 is a configuration diagram showing an example of the battery charging/discharging circuit 1a according to embodiment 2.
As shown in fig. 6, the battery charging/discharging circuit 1a includes a charging circuit unit 20, a charging operation switch unit 30, a series connection switch unit 40, and a switching circuit unit 50 a. The electronic device 100a according to the present embodiment includes a battery charging/discharging circuit 1a, a load unit 2, and a plurality of 2-time batteries 10.
In the present embodiment, a modified example will be described in which the switching circuit unit 50a includes a socket 55, and the socket 55 is connected to an AC adapter to which dc power is supplied from a commercial power supply.
In fig. 6, the same components as those in fig. 1 are denoted by the same reference numerals, and the description thereof will be omitted.
The switching circuit unit 50a includes a resistor 51, a resistor 52, a resistor 53, a switch 54, and a socket 55. The switching circuit unit 50a has the same basic configuration as the switching circuit unit 50a of embodiment 1, except that it includes the socket 55.
The receptacle 55 has a power input terminal IN, a ground terminal 551, and a connection detection terminal 552.
The ground terminal 551 is connected to the GND terminal of the battery charge/discharge circuit 1 a. The ground terminal 551 is configured to be deformed by being connected to the receptacle 55 by the AC adapter, and is configured to contact the connection detection terminal 552 when the AC adapter is not connected to the receptacle 55. When the AC adapter is connected to the receptacle 55, the ground terminal 551 is deformed to release the contact with the connection detection terminal 552, and is electrically separated from the connection detection terminal 552.
The connection detection terminal 552 is connected to the node N1, and is connected to the GND terminal via the ground terminal 551 when the AC adapter is not connected to the receptacle 55. When the AC adapter is connected to the receptacle 55, the connection detection terminal 552 is in a floating state.
In the switching circuit portion 50a, when the AC adapter is not connected to the receptacle 55, the connection detection terminal 552 is connected to the GND terminal via the ground terminal 551. Therefore, the node N1 is fixed to the L state. When the AC adapter is connected to the receptacle 55, the connection detection terminal 552 is released from contact with the ground terminal 551, and the node N1 is brought into the H state by the external power supplied from the AC adapter.
The basic operation of the battery charge/discharge circuit 1a according to the present embodiment is the same as that of embodiment 1 described above, and therefore the description thereof is omitted here.
As described above, the battery charging/discharging circuit 1a according to the present embodiment includes the switching circuit unit 50a, and the switching circuit unit 50a includes the socket 55, and the socket 55 connects the node N1 to the GND terminal when the AC adapter is not connected.
Thus, the battery charge/discharge circuit 1a according to the present embodiment can reliably fix the node N1 to the L state when external power is not supplied. Thus, the battery charging/discharging circuit 1a according to the present embodiment can reduce malfunctions due to noise or the like by the socket 55, and thus can more reliably switch the connection of the battery 10 between the charging and discharging operations 2 times.
[ embodiment 3 ]
Next, the battery charge/discharge circuit 1b and the electronic device 100b according to embodiment 3 will be described with reference to fig. 7.
Fig. 7 is a configuration diagram showing an example of the battery charging/discharging circuit 1b according to embodiment 3.
As shown in fig. 7, the battery charging/discharging circuit 1b includes a charging circuit unit 20, a charging operation switch unit 30a, a series connection switch unit 40a, and a switching circuit unit 50. The electronic device 100b according to the present embodiment includes a battery charging/discharging circuit 1b, a load unit 2, and a plurality of 2-time batteries 10.
In the present embodiment, a modified example in which a function of setting the charging circuit 23 of the charging circuit unit 20 in a floating state when external power is not supplied is added will be described.
In fig. 7, the same components as those in fig. 1 are denoted by the same reference numerals, and the description thereof will be omitted.
The charging operation switch unit 30a includes a switch 31, a switch 32, a switch 33, a switch 34, and a switch 35.
The switch 35 is connected between the GND terminal and the VSS terminal of the charging circuit 23, and sets the charging circuit 23 in a floating state. The switch 35 is, for example, an NMOS transistor. In the switch 35, the source terminal is connected to the GND terminal, the drain terminal is connected to the VSS terminal of the charging circuit 23, and the gate terminal is connected to the node N1 of the switching circuit unit 50.
The switch 33, the switch 34, and the switch 35 are the 1 st switch for setting the charging circuit unit 20 to a floating state.
The series connection switch unit 40a includes a switch 41, a switch 42, a switch 43, and a switch 44.
The switch 44 is connected between the negative terminal of the secondary battery 2 13 and the GND terminal, and connects the secondary battery 2 10 and the GND terminal connected in series. The switch 44 is, for example, an NMOS transistor. In the switch 44, the source terminal is connected to the GND terminal, the drain terminal is connected to the negative terminal of the secondary battery 13, and the gate terminal is connected to a node N2 of the switching circuit unit 50 described later.
The switch 44 has a body diode, and the switch 44 is connected such that the body diode serves as a power direction for supplying dc power from the 2-time batteries 10 connected in series to the load unit 2.
The switches 41 and 44 are the 4 th switch for supplying dc power from the plurality of 2-time batteries 10 (the 2-time battery 11, the 2-time battery 12, and the 2-time battery 13) to the load unit 2.
When external power is not supplied, the switching circuit unit 50 of the present embodiment turns OFF the switches 31, 32, 33, 34, 35, and 54. In this case, the switching circuit unit 50 turns ON the switches 41, 42, 43, and 44.
When external power is supplied, the switching circuit unit 50 turns ON the switches 31, 32, 33, 34, 35, and 54. In this case, the switching circuit unit 50 turns OFF the switches 41, 42, 43, and 44.
The basic operation of the battery charge/discharge circuit 1b according to the present embodiment is the same as that of embodiment 1 described above. And thus, the description thereof is omitted herein.
As described above, the battery charging/discharging circuit 1b according to the present embodiment includes the charging operation switch unit 30a and the series connection switch unit 40 a. The charging operation switch unit 30a has a switch 35 (1 st switch) for setting the charging circuit 23 in a floating state, and the series connection switch unit 40a has a switch 44 (4 th switch) for connecting or disconnecting the 2 nd-order battery 13 to or from the GND terminal.
Thus, the battery charge/discharge circuit 1b according to the present embodiment can set the charge circuit 23 to the floating state during discharge, and can further reduce power consumption. In addition, the battery charge/discharge circuit 1b according to the present embodiment can reliably supply dc power to the load unit 2 from the 2-time batteries 10 connected in series when discharging.
[ 4 th embodiment ]
Next, a battery charging/discharging circuit 1c and an electronic device 100c according to embodiment 4 will be described with reference to fig. 8.
Fig. 8 is a configuration diagram showing an example of the battery charging/discharging circuit 1c according to embodiment 4.
As shown in fig. 8, the battery charging/discharging circuit 1c includes a charging circuit unit 20a, a charging operation switch unit 30b, a series connection switch unit 40b, and a switching circuit unit 50. The electronic device 100c according to the present embodiment includes a battery charging/discharging circuit 1c, a load unit 2, and a plurality of (4) 2-time batteries 10.
In the present embodiment, a modification in the case where the number of the 2-time batteries 10 included in the electronic apparatus 100c is increased will be described. This embodiment is an example of a case where the battery charge/discharge circuit 1 of embodiment 1 having 3 secondary batteries 10 is associated with 4 secondary batteries 10.
In fig. 8, the same components as those in fig. 1 are denoted by the same reference numerals, and the description thereof will be omitted.
The 2-time battery 11, the 2-time battery 12, the 2-time battery 13, and the 2-time battery 14 have the same configuration, and when any 2-time battery included in the electronic device 100c is shown or not particularly distinguished, the 2-time battery 10 will be described.
The charging circuit unit 20a includes a charging circuit 21, a charging circuit 22, a charging circuit 23, and a charging circuit 24. In the present embodiment, the charging circuit 21, the charging circuit 22, the charging circuit 23, and the charging circuit 24 have the same configuration.
The charging circuit 24 is connected to the secondary battery 14, and charges the secondary battery 14 when external power is supplied to the charging circuit unit 20 a. In the charging circuit 24, the VP terminal is connected to the positive terminal of the secondary battery 14, and the VN terminal is connected to the negative terminal of the secondary battery 14.
The charging circuit 21, the charging circuit 22, the charging circuit 23, and the charging circuit 24 are each internally connected to the VSS terminal and the VN terminal via a low resistance or the like.
The charging operation switch unit 30b includes a switch 31, a switch 32, a switch 33, a switch 34, and a switch 35.
The switch 35 is connected between the GND terminal and the VSS terminal of the charging circuit 23, and sets the charging circuit 23 in a floating state. The switch 35 is, for example, an NMOS transistor. In the switch 35, the source terminal is connected to the GND terminal, the drain terminal is connected to the VSS terminal of the charging circuit 23, and the gate terminal is connected to the node N1 of the switching circuit unit 50.
The switch 33, the switch 34, and the switch 35 are the 1 st switches for setting the charging circuit 21, the charging circuit 22, and the charging circuit 23 in a floating state.
The VSS terminal of the charging circuit 24 is connected to the GND terminal without passing through a switch.
The series connection switch unit 40b includes a switch 41, a switch 42, a switch 43, and a switch 45.
The switch 43 in the present embodiment is connected between the positive terminal of the 2-time battery 13 and the negative terminal of the 2-time battery 12, and connects the 2-time battery 12 and the 2-time battery 13 in series. The switch 43 is, for example, a PMOS transistor. In the switch 43, the source terminal is connected to the positive terminal of the secondary battery 2 13, the drain terminal is connected to the negative terminal of the secondary battery 2 12, and the gate terminal is connected to a node N1 of the switching circuit unit 50 described later.
The switch 43 has a body diode, and the switch 43 is connected such that the direction of the current flowing toward the load unit 2 when the secondary battery 12 and the secondary battery 13 are connected in series is opposite to the direction of the current flowing toward the load unit 2.
The switch 45 is connected between the positive terminal of the 2-time battery 14 and the negative terminal of the 2-time battery 13, and connects the 2-time battery 13 and the 2-time battery 14 in series. The switch 45 is, for example, an NMOS transistor. In the switch 45, the source terminal is connected to the negative terminal of the secondary battery 2 13, the drain terminal is connected to the positive terminal of the secondary battery 2 14, and the gate terminal is connected to the node N2 of the switching circuit unit 50.
Further, switch 45 has a body diode, and switch 45 is connected such that the direction of current flowing toward load unit 2 when secondary battery 13 and secondary battery 14 are connected in series is opposite to the direction of current flowing toward load unit 2.
The switch 42, the switch 43, and the switch 45 are 3 rd switches that connect the plurality of 2-time cells 10 (the 2-time cell 11, the 2-time cell 12, the 2-time cell 13, and the 2-time cell 14) in series.
When external power is not supplied, the switching circuit unit 50 of the present embodiment turns OFF the switches 31, 32, 33, 34, 35, and 54. In this case, the switching circuit unit 50 turns ON the switches 41, 42, 43, and 45.
When external power is supplied, the switching circuit unit 50 turns ON the switches 31, 32, 33, 34, 35, and 54. In this case, the switching circuit unit 50 turns OFF the switches 41, 42, 43, and 45.
The basic operation of the battery charge/discharge circuit 1c according to the present embodiment is the same as that of embodiment 1 described above. And thus, the description thereof is omitted herein.
As described above, the battery charging/discharging circuit 1c according to the present embodiment includes the charging circuit unit 20a, the charging operation switch unit 30b, and the series connection switch unit 40 b.
Thus, the battery charge/discharge circuit 1c according to the present embodiment achieves the same effects as those of embodiment 1 described above, and can automatically switch the connection of the battery 10 between the charging and discharging 2 times with a simple configuration.
[ 5 th embodiment ]
Next, a battery charging/discharging circuit 1d and an electronic device 100d according to embodiment 5 will be described with reference to fig. 9.
Fig. 9 is a configuration diagram showing an example of the battery charging/discharging circuit 1d according to embodiment 5.
As shown in fig. 9, the battery charging/discharging circuit 1d includes a charging circuit unit 20b, a charging operation switch unit 30c, a series connection switch unit 40c, and a switching circuit unit 50. The electronic device 100d according to the present embodiment includes a battery charging/discharging circuit 1d, a load unit 2, and a plurality of (4) 2-time batteries 10.
In the present embodiment, a 2 nd modification in the case where the number of 2-time batteries 10 included in the electronic apparatus 100d is increased will be described.
In fig. 9, the same components as those in fig. 8 are denoted by the same reference numerals, and the description thereof will be omitted.
The charging circuit unit 20b includes a charging circuit 25 and a charging circuit 26. In the present embodiment, the charging circuit 25 and the charging circuit 26 have the same configuration, and 2 batteries of 2 times can be connected in parallel and individually charged.
The charging circuit 25 is connected to the 2-time battery 11 and the 2-time battery 12, and charges the 2-time battery 11 and the 2-time battery 12 when external power is supplied to the charging circuit unit 20 b. In the charging circuit 25, the VP2 terminal is connected to the positive terminal of the secondary battery 11, and the VP1 terminal is connected to the positive terminal of the secondary battery 12. The VP1 terminal is connected to the negative terminal of the 2-time battery 11 via the switch 42, and the VN1 terminal is connected to the negative terminal of the 2-time battery 12 and to the negative terminal of the 2-time battery 11 via a switch 46 described later.
The charging circuit 26 is connected to the secondary battery 13 and the secondary battery 14, and charges the secondary battery 13 and the secondary battery 14 when external power is supplied to the charging circuit unit 20 b. In the charging circuit 26, the VP2 terminal is connected to the positive terminal of the secondary battery 13, and the VP1 terminal is connected to the positive terminal of the secondary battery 14. The VP1 terminal is connected to the negative terminal of the 2-time battery 13 via a switch 45, and the VN1 terminal is connected to the negative terminal of the 2-time battery 14 and to the negative terminal of the 2-time battery 13 via a switch 47 described later.
The charging circuit 25 and the charging circuit 26 are connected to a VSS terminal and a VN1 terminal via low resistors and the like, respectively.
The charging operation switch unit 30c includes a switch 31, a switch 32, a switch 33, and a switch 36.
The switches 32 and 33 in the present embodiment are connected to the charging circuit 25 instead of the charging circuit 21 described above.
The switch 36 is connected between the IN terminal (power input terminal) and the VDD terminal of the charging circuit 26. The switch 36 is, for example, a PMOS transistor. IN the switch 36, the source terminal is connected to the VDD terminal, the drain terminal is connected to the IN terminal, and the gate terminal is connected to the node N2 of the switching circuit unit 50.
The switch 36 has a body diode, and the switch 36 is connected such that the body diode is forward from the IN terminal toward the VDD terminal of the charging circuit 26.
The switch 33 is the 1 st switch for setting the charging circuit 25 to a floating state.
The VSS terminal of the charging circuit 26 is connected to the GND terminal without passing through a switch.
The series connection switch unit 40c includes a switch 41, a switch 42, a switch 43, a switch 45, a switch 46, and a switch 47.
The switch 46 is connected between the negative terminal of the secondary battery 11 and the VN1 terminal of the charging circuit 25, and connects the negative terminal of the secondary battery 11 and the VN1 terminal of the charging circuit 25 during charging. The switch 46 is, for example, an NMOS transistor. In the switch 46, a source terminal is connected to the VN1 terminal of the charging circuit 25, a drain terminal is connected to the negative terminal of the secondary battery 11, and a gate terminal is connected to the node N1 of the switching circuit unit 50.
The switch 47 is connected between the negative terminal of the secondary battery 13 and the VN1 terminal of the charging circuit 26, and connects the negative terminal of the secondary battery 13 and the VN1 terminal of the charging circuit 26 during charging. The switch 47 is, for example, an NMOS transistor. In the switch 47, a source terminal is connected to the VN1 terminal of the charging circuit 26, a drain terminal is connected to the negative terminal of the secondary battery 13, and a gate terminal is connected to the node N1 of the switching circuit unit 50.
When external power is not supplied, the switching circuit unit 50 of the present embodiment turns OFF the switches 31, 32, 33, 36, 46, 47, and 54. In this case, the switching circuit unit 50 turns ON the switches 41, 42, 43, and 45.
When external power is supplied, the switching circuit unit 50 turns ON the switches 31, 32, 33, 36, 46, 47, and 54. In this case, the switching circuit unit 50 turns OFF the switches 41, 42, 43, and 45.
The basic operation of the battery charge/discharge circuit 1d according to the present embodiment is the same as that of the above-described embodiments 1 and 4. And thus, the description thereof is omitted herein.
As described above, the battery charging/discharging circuit 1d according to the present embodiment includes the charging circuit unit 20b, the charging operation switch unit 30c, and the series connection switch unit 40 c.
Thus, the battery charge/discharge circuit 1d according to the present embodiment achieves the same effects as those of the above-described embodiments 1 and 4, and can automatically switch the connection of the battery 10 between the charging and discharging 2 times with a simple configuration.
The present invention is not limited to the above-described embodiments, and modifications can be made without departing from the scope of the present invention.
For example, in the above embodiments, the electronic devices 100(100a to 100d) have been described as examples of devices such as guitar amplifiers, but may be electronic devices used for other applications. As shown in fig. 10, the electronic devices 100(100a to 100d) may be musical instruments 3 having battery charging/discharging circuits 1(1a to 1 d).
Fig. 10 is a configuration diagram showing an example of a musical instrument 3 having the above-described battery charge/discharge circuit 1(1a to 1 d).
The musical instrument 3 shown in the figure is, for example, an amplifier-built guitar, and has a battery charging/discharging circuit 1(1a to 1d) and an electronic circuit as a load section 2 for executing electronic processing of the musical instrument 3. Thus, the musical instrument 3 achieves the same effect as the above-described battery charge/discharge circuit 1(1a to 1d), and can automatically switch the connection of the battery 10 between the time of charge and the time of discharge 2 times with a simple configuration. Note that the musical instrument 3 may be applied to musical instruments other than the guitar with the built-in amplifier.
In addition, a part or all of the above embodiments may be combined. For example, each of embodiments 2 and 3 can be applied to the other embodiments.
In the above embodiments, the example in which 3 or 4 cells 10 are used for 2 cells has been described, but the present invention is not limited thereto, and the present invention can also be applied to a case in which 2 cells 10 are used for 2 cells or 5 cells or more.
A part or all of the functions of the battery charge/discharge circuit 1(1a to 1d) may be implemented as an integrated circuit such as an lsi (large Scale integration). In addition, when a technique for realizing an integrated circuit that replaces an LSI appears due to the advancement of semiconductor technology, an integrated circuit obtained by the technique may be used.
Description of the reference numerals
1. 1a, 1b, 1c, 1d battery charging and discharging circuit
2 load part
3 musical instrument
10. 11, 12, 13, 142 times battery
20. 20a, 20b charging circuit part
21. 22, 23, 24, 25, 26 charging circuit
30. 30a, 30b, 30c charging operation switch unit
40. 40a, 40b, 40c are connected in series with the switch section
50. 50a switching circuit part
31. 32, 33, 34, 35, 36, 41, 42, 43, 44, 45, 46, 47, 54 switches
51. 52, 53 resistors
55 socket
100. 100a, 100b, 100c, 100d electronic device
551 ground terminal
552 connection detection terminal
Claims (8)
1. A battery charging and discharging circuit, comprising:
a charging circuit unit capable of connecting a plurality of 2-time batteries in parallel and individually charging the batteries;
a series connection switch unit that connects the plurality of 2-time batteries in series and supplies dc power from the plurality of 2-time batteries connected in series to a load unit;
a charging operation switch unit that supplies external power, which is direct current power supplied from the outside, to the load unit and the charging circuit unit, and operates the charging circuit unit; and
and a switching circuit unit that detects whether or not the external power is supplied, and when the external power is detected, releases the series connection of the series connection switch unit, and sets the charging operation switch unit to a state in which the external power is supplied to the load unit and the charging circuit unit.
2. The battery charge and discharge circuit of claim 1,
the switching circuit unit sets the series connection switch unit to the series connection state when the external power is not detected.
3. The battery charge and discharge circuit of claim 2,
the charging operation switch unit has a 1 st switch for setting the charging circuit unit to a floating state,
the switching circuit unit operates the 1 st switch to set the charging circuit unit to a floating state when the external power is not detected.
4. The battery charge and discharge circuit of claim 3,
the charging operation switch unit has a 2 nd switch for supplying the external power to the load unit,
the series connection switch unit includes:
a 3 rd switch connecting the plurality of 2 nd-order batteries in series; and
a 4 th switch for supplying the DC power from the plurality of 2-time batteries to the load unit,
the 2 nd switch and the 4 th switch are connected so that the body diode faces the load part and is in a forward direction,
the 3 rd switch is connected such that the direction of the current flowing to the load unit when the plurality of 2 nd-order batteries are connected in series is opposite to the direction of the current flowing to the load unit.
5. The battery charge and discharge circuit of claim 4,
the series connection switching section has a plurality of the 3 rd switches,
the lowermost switch among the plurality of 3 rd switches closest to the reference power supply line is an NMOS transistor.
6. An electronic apparatus, having:
the battery charge and discharge circuit of any of claims 1 to 5; and
and an electronic circuit that executes predetermined processing as the load unit.
7. A musical instrument, having:
the battery charge and discharge circuit of any of claims 1 to 5; and
and an electronic circuit for executing electronic processing of the musical instrument as the load unit.
8. A battery charging and discharging method is a battery charging and discharging method of a battery charging and discharging circuit, the battery charging and discharging circuit comprises: a charging circuit unit capable of connecting a plurality of 2-time batteries in parallel and individually charging the batteries; a series connection switch unit that connects the plurality of 2-time batteries in series and supplies dc power from the plurality of 2-time batteries connected in series to a load unit; and a charging operation switch unit for supplying external power, which is direct current power supplied from the outside, to the load unit and the charging circuit unit to operate the charging circuit unit,
in the method for charging and discharging a battery,
detecting whether the external power is supplied or not,
when the external power is detected, the series connection of the series connection switch unit is released, and the charging operation switch unit is set to a state in which the external power is supplied to the load unit and the charging circuit unit.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2018/010534 WO2019176098A1 (en) | 2018-03-16 | 2018-03-16 | Battery charging/discharging circuit, electronic device, musical instrument, and battery charging/discharging method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111819752A true CN111819752A (en) | 2020-10-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201880090790.3A Pending CN111819752A (en) | 2018-03-16 | 2018-03-16 | Battery charging/discharging circuit, electronic device, musical instrument, and battery charging/discharging method |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP6984733B2 (en) |
| CN (1) | CN111819752A (en) |
| WO (1) | WO2019176098A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR102382580B1 (en) * | 2020-04-29 | 2022-04-05 | 주식회사 로보로보 | n-CELL BATTERY CHARGING SYSTEM USING USB |
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| CN2610547Y (en) * | 2003-03-21 | 2004-04-07 | 比亚迪股份有限公司 | Charge-discharge circuit of lithium secondary battery for note-book type computer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH0511744U (en) * | 1991-07-24 | 1993-02-12 | 日本電気ホームエレクトロニクス株式会社 | Secondary battery charge / discharge circuit |
| JPH09305170A (en) * | 1996-05-15 | 1997-11-28 | Kawai Musical Instr Mfg Co Ltd | Power source device for electronic music instrument |
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2018
- 2018-03-16 JP JP2020506088A patent/JP6984733B2/en active Active
- 2018-03-16 CN CN201880090790.3A patent/CN111819752A/en active Pending
- 2018-03-16 WO PCT/JP2018/010534 patent/WO2019176098A1/en active Application Filing
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2610547Y (en) * | 2003-03-21 | 2004-04-07 | 比亚迪股份有限公司 | Charge-discharge circuit of lithium secondary battery for note-book type computer |
| CN1536730A (en) * | 2003-04-04 | 2004-10-13 | 京东方科技集团股份有限公司 | Chargeable cell unit whose connection state can be controlled and assembled battery |
| CN102280911A (en) * | 2010-06-14 | 2011-12-14 | 株式会社日立制作所 | Electrical charge and discharge circuit, and an embedded controller |
| CN103329338A (en) * | 2011-01-26 | 2013-09-25 | 索尼公司 | Battery pack and power consuming device |
| JP2013099063A (en) * | 2011-10-31 | 2013-05-20 | Lenovo Singapore Pte Ltd | Power supply system and power supply method of electric and electronic apparatus |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2019176098A1 (en) | 2019-09-19 |
| JP6984733B2 (en) | 2021-12-22 |
| JPWO2019176098A1 (en) | 2020-12-03 |
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