TW202040924A - Ac charging and power supply circuit - Google Patents

Abstract

The present disclosure provides an AC charging and power supply circuit including a buck block, a rectifier block, a switching battery block and a controller. The buck block receives an AC power. The rectifier block is electrically connected to the buck block. The rectifier block has a rectified voltage output end and a ground end. The switch battery block is electrically connected between a power terminal and the ground end. The switch battery block includes a first diode, a voltage control switch and a battery. The anode of the first diode is electrically connected to the rectified voltage output end, and the cathode of the first diode is electrically connected to the power terminal. Th voltage control switch and the battery are electrically between the first diode and the ground end. The controller is electrically connected between the power terminal and the ground end, and the controller controls an on/off state of the voltage control switch.

Description

AC charging and power supply circuit

The present invention relates to a circuit, and particularly to an AC charging and power supply circuit.

At present, the rechargeable electric mosquito swatter on the market mainly uses lead-acid batteries because of the low cost of lead-acid batteries. According to usage habits, many people feel that the battery life of rechargeable mosquito swatters is short. Because electric mosquito swatters are regarded as cheap consumables, when the battery is broken, most people just throw away the electric mosquito swatter and buy a new one, causing waste. Lead-acid batteries directly into incinerators or landfills may cause heavy metal pollution.

One of the important reasons for the short battery life is that the battery is overcharged, and the hydrogen and oxygen produced by the electrolysis of water that are not absorbed by the electric energy cause the battery to leak or damage the electrode plates. Because electric mosquito swatters are low-priced daily necessities and have volume limitations, the general charging circuit uses simple resistors + capacitors + rectifiers, and there is no protection against full power and power failure. In order to avoid the risk of explosion, it is generally charged slowly with a current of about 20-40mA, and it takes several hours to fully charge. Because of the long charging time, it is easy to forget. Generally, the lead-acid battery electric mosquito swatter does not indicate that it is fully charged, and the user does not know how long to charge it; or some people are used to charging before going to bed and the charging time is too long.

The present invention provides an AC charging and power supply circuit to improve the problems of the prior art.

In an embodiment of the present invention, the AC charging and power supply circuit proposed by the present invention includes a step-down block, a rectifier block, a switching battery block, and a controller. The step-down block is electrically connected to the AC power supply, the rectifier block is electrically connected to the step-down block, the rectifier block has a rectified voltage output terminal and a ground terminal, the switch battery block is electrically connected between the power supply terminal and the ground terminal, and the switch The battery block includes a first diode, an electric switch and a battery. The anode of the first diode is electrically connected to the rectified voltage output terminal, the cathode of the first diode is electrically connected to the power supply terminal, and the electric control switch is electrically connected to the battery. It is connected between the first diode and the ground terminal. The controller is electrically connected between the power supply terminal and the ground terminal, and the controller is used for controlling the opening and closing of the electric control switch.

In an embodiment of the present invention, the AC charging and power supply circuit further includes an audit diode. The anode of the audit diode is electrically connected to the ground terminal, and the cathode of the audit diode is electrically connected to the power supply terminal.

In an embodiment of the present invention, the AC charging and power supply circuit further includes a voltage stabilizing capacitor. The voltage stabilizing capacitor is electrically connected between the power supply terminal and the ground terminal.

In an embodiment of the present invention, the AC charging and power supply circuit further includes a first resistor and a second resistor. One end of the first resistor is electrically connected to the rectified voltage output terminal, one end of the second resistor is electrically connected to the other end of the first resistor, and the other end of the second resistor is electrically connected to the ground terminal. The input pin of the controller is electrically connected The other end of the first resistor is connected to the end of the second resistor.

In an embodiment of the present invention, switching the battery block further includes a manual switch. The manual switch is connected in series with the battery.

In an embodiment of the present invention, the switch battery block further includes a resistor. The two ends of the resistor are electrically connected to the controller and the electric control switch. The electric control switch is an NPN type two-carrier junction transistor. The collector of the NPN type two-carrier junction transistor is electrically connected to the first diode. The cathode of the NPN type two-carrier junction transistor is electrically connected to the resistor, the emitter of the NPN type two-carrier junction transistor is electrically connected to one end of the battery, and the other end of the battery is electrically connected to the ground terminal. The two ends of the manual switch are electrically connected to the collector and the emitter of the NPN type bi-carrier junction transistor.

In an embodiment of the present invention, the switch battery block further includes a resistor. The two ends of the resistor are electrically connected to the controller and the electric control switch. The electric control switch is a PNP type bi-carrier junction transistor. One end of the battery is electrically connected to the cathode of the first diode, and the other end of the battery is electrically connected. Connect the emitter of the PNP type two-carrier junction transistor, the base of the PNP type two-carrier junction transistor is electrically connected to the resistor, and the collector of the PNP type two-carrier junction transistor is electrically connected to the ground terminal, The two ends of the manual switch are electrically connected to the emitter and the collector of the PNP type bi-carrier junction transistor.

In an embodiment of the present invention, the switch battery block further includes a resistor. The two ends of the resistor are electrically connected to the controller and the electric control switch. The electric control switch is an NPN type two-carrier junction transistor. The collector of the NPN type two-carrier junction transistor is electrically connected to the first diode. The anode of the NPN type two-carrier junction transistor is electrically connected to the resistor, the emitter of the NPN type two-carrier junction transistor is electrically connected to one end of the battery, and the other end of the battery is electrically connected to the ground The two ends of the manual switch are respectively electrically connected to the cathode of the first diode and the end of the battery.

In an embodiment of the present invention, the switch battery block further includes a second diode. The electrical control switch is an N-type metal oxide semiconductor. One end of the battery is electrically connected to the cathode of the first diode, the other end of the battery is electrically connected to the anode of the second diode, and the cathode of the second diode is electrically connected to N The drain of the N-type metal oxide semiconductor is electrically connected to the controller, the source of the N-type metal oxide semiconductor is electrically connected to the ground terminal, and both ends of the manual switch are electrically connected to the second diode. The anode of the body and the source of the N-type metal oxide semiconductor.

In an embodiment of the present invention, the switch battery block further includes a second diode. The electric control switch is a P-type metal oxide semiconductor. One source of the P-type metal oxide semiconductor is electrically connected to the cathode of the first diode, and the gate electrode of the P-type metal oxide semiconductor is electrically connected to the controller. The drain is electrically connected to the anode of the second diode, a cathode of the second diode is electrically connected to one end of the battery, the other end of the battery is electrically connected to the ground terminal, and both ends of the manual switch are electrically connected to the P-type gold The source of the oxygen semiconductor and the cathode of the second diode.

In an embodiment of the present invention, the switch battery block further includes a second diode. The electric control switch is a P-type metal oxide semiconductor. One source of the P-type metal oxide semiconductor is electrically connected to the anode of the first diode, and the gate electrode of the P-type metal oxide semiconductor is electrically connected to the controller. The drain is electrically connected to the anode of the second diode, the cathode of the second diode is electrically connected to one end of the battery, the other end of the battery is electrically connected to the ground terminal, and both ends of the manual switch are electrically connected to the first diode. The cathode of the body and the cathode of the second diode.

In an embodiment of the present invention, the switch battery block further includes a Two diodes and resistors. The two ends of the resistor are electrically connected to the controller and the electric control switch respectively. The electric control switch is an NPN type two-carrier junction transistor. The cathode of the first diode is electrically connected to one end of the battery, and the other end of the battery is electrically connected. Connect the anode of the second diode, the cathode of the second diode is electrically connected to the collector of the NPN type bipolar junction transistor, and the base of the NPN type bipolar junction transistor is electrically connected to the resistor, The emitter of the NPN type two-carrier junction transistor is electrically connected to the ground terminal, and the two ends of the manual switch are respectively electrically connected to the anode of the second diode and the emitter of the NPN type two-carrier junction transistor.

In an embodiment of the present invention, the switch battery block further includes a second diode and a resistor. The two ends of the resistor are respectively electrically connected to the controller and the electric control switch. The electric control switch is a PNP type two-carrier junction transistor, and the cathode of the first diode is electrically connected to the PNP type two-carrier junction transistor One emitter of the PNP type two-carrier junction transistor is electrically connected to the resistor, and one collector of the PNP type two-carrier junction transistor is electrically connected to an anode of the second diode. One cathode of the two diode is electrically connected to one end of the battery, the other end of the battery is electrically connected to the ground terminal, and the two ends of the manual switch are electrically connected to the emitter of the PNP bipolar junction transistor and the battery terminal. .

In an embodiment of the present invention, the switch battery block further includes a second diode and a resistor. The two ends of the resistor are respectively electrically connected to the controller and the electric control switch. The electric control switch is a PNP type two-carrier junction transistor. The anode of the first diode is electrically connected to the PNP type two-carrier junction transistor. The emitter, the base of the PNP type two-carrier junction transistor is electrically connected to the resistor, and the collector of the PNP type two-carrier junction transistor is electrically connected to the anode of the second diode and the second diode. The cathode is electrically connected to one end of the battery, and the other end of the battery is electrically connected to ground The two ends of the manual switch are respectively electrically connected to the cathode of the first diode and the end of the battery.

In an embodiment of the present invention, the switch battery block further includes a second diode. The electronically controlled switch is an N-type metal oxide semiconductor. The anode of the second diode is electrically connected to the cathode of the first diode, and a cathode of the second diode is electrically connected to the drain of the N-type metal oxide semiconductor. The gate electrode of the metal oxide semiconductor is electrically connected to the controller, the source electrode of the N-type metal oxide semiconductor is electrically connected to one end of the battery, the other end of the battery is electrically connected to the ground terminal, and the two ends of the manual switch are electrically connected to the second diode. The anode of the body and the source of the N-type metal oxide semiconductor.

In an embodiment of the present invention, the switch battery block further includes a second diode. The electric control switch is a P-type metal oxide semiconductor. The cathode of the first diode is electrically connected to one end of the battery, and the other end of the battery is electrically connected to the source electrode of the P-type metal oxide semiconductor, and the gate electrode of the P-type metal oxide semiconductor is electrically connected. Connect the controller, the drain of the P-type metal oxide semiconductor is electrically connected to the anode of the second diode, the cathode of the second diode is grounded, and the two ends of the manual switch are electrically connected to the source of the P-type metal oxide semiconductor. The cathode with the second diode.

In an embodiment of the present invention, the switch battery block further includes a second diode. The electric control switch is an N-type metal oxide semiconductor. The anode of the first diode is electrically connected to the anode of the second diode, and the cathode of the second diode is electrically connected to the drain of the N-type metal oxide semiconductor. The gate electrode of the oxygen semiconductor is electrically connected to the controller, the source electrode of the N-type metal oxide semiconductor is electrically connected to one end of the battery, the other end of the battery is electrically connected to the ground terminal, and both ends of the manual switch are electrically connected to the first diode. The cathode and the source of the N-type metal oxide semiconductor.

In an embodiment of the present invention, the AC charging and power supply circuit is more Contains light-emitting elements. The light-emitting element is electrically connected to the controller.

In an embodiment of the invention, the step-down block is a capacitor.

In an embodiment of the present invention, the step-down block includes a capacitor and a resistor, and the resistor is connected in parallel with the capacitor.

In summary, the technical solution of the present invention has obvious advantages and beneficial effects compared with the prior art. Compared with the traditional method, the technical solution of the present invention has the following features: 1. Fully charged and power off; 2. Display of charging and full charging; 3. No manual switching switch is required for charging/general use, but automatic switching; 4. .The route is simple.

Hereinafter, the above description will be described in detail by way of implementation, and a further explanation will be provided for the technical solution of the present invention.

In order to make the above and other objects, features, advantages and embodiments of the present invention more obvious and understandable, the description of the attached symbols is as follows:

100‧‧‧AC charging and power supply circuit

110‧‧‧Buck block

120‧‧‧rectifier block

121‧‧‧Rectified voltage output terminal

122‧‧‧Ground terminal

130‧‧‧Switch battery block

140‧‧‧Controller

210‧‧‧Resistor

220‧‧‧NPN type two-carrier junction transistor

230‧‧‧Battery

310‧‧‧Resistor

320‧‧‧PNP type two-carrier junction transistor

330‧‧‧Battery

410‧‧‧Resistor

420‧‧‧NPN type two-carrier junction transistor

430‧‧‧Battery

520‧‧‧N-type metal oxide semiconductor

530‧‧‧Battery

620‧‧‧P-type metal oxide semiconductor

630‧‧‧Battery

720‧‧‧P-type metal oxide semiconductor

730‧‧‧Battery

810‧‧‧Resistor

820‧‧‧NPN type two-carrier junction transistor

830‧‧‧Battery

910‧‧‧Resistor

920‧‧‧PNP type two-carrier junction transistor

930‧‧‧Battery

1010‧‧‧Resistor

1020‧‧‧PNP type two-carrier junction transistor

1030‧‧‧Battery

1120‧‧‧N-type metal oxide semiconductor

1130‧‧‧Battery

1220‧‧‧P-type metal oxide semiconductor

1230‧‧‧Battery

1320‧‧‧N-type metal oxide semiconductor

1330‧‧‧Battery

AC_IN‧‧‧input pin

CHA‧‧‧Charging pin

‧‧‧充電接腳

‧‧‧Charging pin

C1‧‧‧Regulating capacitor

D1‧‧‧First diode

D2‧‧‧The second diode

LED1‧‧‧Light-emitting element

R1‧‧‧First resistor

R2‧‧‧Second resistor

SW‧‧‧Manual switch

VDD‧‧‧Power supply terminal

VSS‧‧‧Ground terminal

ZD‧‧‧Sensor diode

In order to make the above and other objects, features, advantages and embodiments of the present invention more comprehensible, the description of the accompanying drawings is as follows: Figure 1 is a circuit block of an AC charging and power supply circuit according to an embodiment of the present invention Figure; Figure 2 is a circuit block diagram of a switching battery block according to an embodiment of the present invention; Figure 3 is a circuit block diagram of a switching battery block according to an embodiment of the present invention; Figure 4 is in accordance with the present invention A circuit block diagram for switching battery blocks according to an embodiment of the invention; Fig. 5 is a circuit block diagram of a switching battery block according to an embodiment of the present invention; Fig. 6 is a circuit block diagram of a switching battery block according to an embodiment of the present invention; Fig. 7 is a circuit block diagram of a switching battery block according to an embodiment of the present invention A circuit block diagram of a switching battery block according to an embodiment; Figure 8 is a circuit block diagram of a switching battery block according to an embodiment of the present invention; Fig. 9 is a switching battery block according to an embodiment of the present invention Figure 10 is a circuit block diagram of a switching battery block according to an embodiment of the present invention; Figure 11 is a circuit block diagram of a switching battery block according to an embodiment of the present invention; Figure 12 Is a circuit block diagram of a switching battery block according to an embodiment of the present invention; FIG. 13 is a circuit block diagram of a switching battery block according to an embodiment of the present invention; and FIG. 14 is a circuit block diagram according to an embodiment of the present invention A circuit block diagram of a step-down block.

In order to make the description of the present invention more detailed and complete, please refer to the attached drawings and the various embodiments described below. The same numbers in the drawings represent Same or similar components. On the other hand, well-known elements and steps are not described in the embodiment to avoid unnecessary limitation of the present invention.

In the implementation and the scope of the patent application, the description of "connection" can generally refer to a component that is indirectly coupled to another component through other components, or that one component is directly connected to another component without other components.

In the implementation and the scope of the patent application, the description of "connection" can generally refer to a component that is indirectly connected to another component through other components, or that a component is physically connected to another component without going through other components. .

In the implementation mode and the scope of the patent application, unless the article is specifically limited in the context, "a" and "the" can generally refer to a single or plural.

The "about", "approximately" or "approximately" used in this article are used to modify any amount that can be changed slightly, but such slight changes will not change its essence. If there is no special description in the embodiment, it means that the error range of the value modified with "about", "approximately" or "approximately" is generally allowed within 20%, preferably less than 10% Within, and better within five percent.

FIG. 1 is a circuit block diagram of an AC charging and power supply circuit 100 according to an embodiment of the invention. As shown in Figure 1, the rectifier block 120 is electrically connected to the step-down block 110. The rectifier block 120 has a rectified voltage output terminal 121 and a ground terminal 122. The ground terminal 122 corresponds to the ground terminal VSS. The controller 140 is electrically connected between the power supply terminal VDD and the ground terminal 122, and the controller 140 is electrically connected between the power supply terminal VDD and the ground terminal 122.

In an embodiment of the present invention, the controller 140 is a microcontroller (MCU), and the input pin AC_IN (representing the input pin for rectified voltage) of the controller 140 and the charging pin CHA (representing the battery area for controlling the switch The component symbols used in block 130 (charging pins) are convenient for explanation. The general input and output pins are named according to their functions and do not represent the actual code of the MCU pins.

In operation, if the step-down block 110 is used to receive alternating current AC, the rectified voltage output terminal 121 of the rectifier block 120 provides a rectified voltage to charge the switching battery block 130, and the controller 140 determines whether the voltage of the power supply terminal VDD is greater than the target When the voltage is high, when the voltage of the power supply terminal VDD is greater than or equal to the target voltage, the controller 140 turns off the switch battery block 130 so that the switch battery block 130 stops receiving the rectified voltage provided by the rectified voltage output terminal 121.

In practice, in order to reduce the cost and facilitate the use of charging and electric mosquito swatter power supply, the controller 140 can directly detect the voltage during closed circuit charging, which is only suitable for slow charging with a battery capacity of 1/20-1/10 Current, too much current will affect the reading of battery voltage. For example, the charging current of 400mAh is 20-40mA. The battery in the switch battery block 130 has the highest voltage when it is charged, and will gradually drop to a stable voltage after several hours, followed by a slow voltage drop during self-discharge. Generally, when the battery is charged in a closed circuit to 4.4-4.5v, the open circuit voltage can be stably maintained at 4.2v. It should be understood that the above voltage may require static/dynamic adjustment due to different battery conditions. You can determine whether to adjust the target voltage by detecting the magnitude of the voltage rise.

FIG. 2 is a circuit block diagram of a switch battery block 130 according to an embodiment of the invention. As shown in Figure 2, the anode of the first diode D1 is electrically connected to the rectified voltage output terminal 121, and the cathode of the first diode D1 is electrically connected to Connected to the power supply terminal VDD, the electronically controlled switch (such as the NPN type dual-carrier junction transistor 220) and the battery 230 are electrically connected between the first diode D1 and the ground terminal. The manual switch SW is connected in series with the battery 230. The controller 140 is used to control the opening and closing of the electric control switch.

In Figure 2, the two ends of the resistor 210 are respectively electrically connected to the controller 140 and the electric control switch. The electric control switch is the NPN type two-carrier junction transistor 220, and the NPN type two-carrier junction transistor 220 The collector is electrically connected to the cathode of the first diode D1, the base of the NPN type two-carrier junction transistor 220 is electrically connected to the resistor 210, and the emitter of the NPN type two-carrier junction transistor 220 is electrically connected One end of the battery 230 and the other end of the battery 230 are electrically connected to the ground terminal, and both ends of the manual switch SW are electrically connected to the collector and the emitter of the NPN type bi-carrier junction transistor 220, respectively.

的電壓互為反相，熟習此項技藝者當視當時需要，彈性選擇之。 FIG. 3 is a circuit block diagram of a switching battery block 130 according to an embodiment of the present invention. As shown in Figure 3, the anode of the first diode D1 is electrically connected to the rectified voltage output terminal 121, and the cathode of the first diode D1 is electrically connected to the power supply terminal VDD, and the electronically controlled switch (such as: PNP type dual carrier The junction transistor 320) and the battery 330 are electrically connected between the first diode D1 and the ground terminal. The manual switch SW is connected in series with the battery 330. It should be understood that the voltage of the charging pin CHA and the charging pin

The voltages are opposite to each other, and those who are familiar with this skill should choose it flexibly according to the needs at the time.

In Figure 3, the two ends of the resistor 310 are electrically connected to the controller 140 and the electric control switch respectively. The electric control switch is a PNP type bipolar junction transistor 320. One end of the battery 330 is electrically connected to the first two poles. The cathode of the body D1, the other end of the battery 330 is electrically connected to the emitter of the PNP bi-carrier junction transistor 320 The base of the PNP type two-carrier junction transistor 320 is electrically connected to the resistor 310, the collector of the PNP type two-carrier junction transistor 320 is electrically connected to the ground terminal, and the two ends of the manual switch SW are electrically connected respectively The emitter and collector of the PNP type bi-carrier junction transistor 320 are connected.

FIG. 4 is a circuit block diagram of a switch battery block 130 according to an embodiment of the invention. As shown in Figure 4, the anode of the first diode D1 is electrically connected to the rectified voltage output terminal 121, and the cathode of the first diode D1 is electrically connected to the power supply terminal VDD, and the electronically controlled switch (such as: NPN double carrier The junction transistor 420) and the battery 430 are electrically connected between the first diode D1 and the ground terminal. The manual switch SW is connected in series with the battery.

In Figure 4, the two ends of the resistor 410 are respectively electrically connected to the controller 140 and the electric control switch. The electric control switch is the NPN type two-carrier junction transistor 420, and the NPN type two-carrier junction transistor 420 The collector is electrically connected to the anode of the first diode D1, the base of the NPN type two-carrier junction transistor 420 is electrically connected to the resistor 410, and the emitter of the NPN type two-carrier junction transistor 420 is electrically connected One end of the battery 430 and the other end of the battery 430 are electrically connected to the ground terminal, and two ends of the manual switch SW are electrically connected to the cathode of the first diode D1 and the end of the battery 430 respectively.

Comparing the structures of Figures 2 and 4, the switch battery block 130 is as shown in the dashed line in Figure 2. There are batteries in the charging circuit, and the NPN type bi-carrier junction transistor 220 is connected in series between the power supply terminal VDD and the ground terminal. Therefore, the voltage of the power supply terminal VDD=V battery+V _CE , where V battery is the voltage of the battery 230, and V _CE is the collector-to-emitter voltage of the NPN bipolar junction transistor 220. In the NPN type bi-carrier junction transistor 220 (for example: 2N3904) circuit, V _{CE is} about 0.88v. Therefore, assuming that it is charged to 4.4v, the charging stop voltage of the power supply terminal VDD to be detected by the controller 140 is 4.4+0.88=5.28v. The base-to-emitter PN structure of the NPN type dual carrier junction transistor 220 can prevent the battery from leaking to the power supply terminal VDD when it is not charged. For actual measurement of impedance calculation, the leakage current of NPN type bi-carrier junction transistor 220 (eg 2N3904) is about 1.002nA. Based on the battery capacity of 400mAh, it will take 45570 years to leak light, so it can be ignored. If the charging circuit is placed on the anode of the first diode D1 as shown in Figure 4, the charging voltage of the battery 430 will increase, but the voltage reading of the battery 430 will be less accurate. The manual switch SW must be able to directly connect the battery 430 to the power supply terminal VDD, the current will be weakened through the first diode D1, and the output of the electric mosquito swatter will be much weaker.

FIG. 5 is a circuit block diagram of a switching battery block 130 according to an embodiment of the present invention. As shown in Figure 5, the anode of the first diode D1 is electrically connected to the rectified voltage output terminal 121, the cathode of the first diode D1 is electrically connected to the power supply terminal VDD, and the electronic control switch (such as: N-type metal oxide semiconductor 520) The battery 530 is electrically connected between the first diode D1 and the ground terminal. The manual switch SW is connected in series with the battery.

In Figure 5, the electrically controlled switch is an N-type metal oxide semiconductor 520. One end of the battery is electrically connected to the cathode of the first diode D1, and the other end of the battery 530 is electrically connected to the anode of the second diode D2. The cathode of the diode D2 is electrically connected to the drain of the N-type metal oxide semiconductor 520, the gate of the N-type metal oxide semiconductor 520 is electrically connected to the controller 140, and the source of the N-type metal oxide semiconductor 520 is electrically connected to the ground terminal , The two ends of the manual switch SW are electrically connected to the anode of the second diode D2 and the source of the N-type metal oxide semiconductor 520, respectively.

If the switch battery block 130 uses N-type metal oxide semiconductor 520 + second diode D2 as shown in Figure 5, the voltage of the power supply terminal VDD = V battery + V _DS + V _D2 , where V battery is the voltage of battery 530, V _DS is the voltage from the drain to the source of the N-type metal oxide semiconductor 520, and V _D2 is the voltage of the second diode D2. V _DS +V _{D2 is} approximately 0.76V. The voltage drop is relatively low, so the charging efficiency will be higher than the bi-carrier junction transistor (BJT) shown in Figures 2 to 4 above. The second diode D2 in the loop prevents the battery 530 from conducting and discharging through the drain-to-source body diode inside the N-type metal oxide semiconductor 520 when it is not charged. Generally, the leakage current of the 200mA diode is about 0.1uA. Based on the battery capacity of 400mAh, it takes about 456 years to leak light, so it can be ignored.

FIG. 6 is a circuit block diagram of a switch battery block 130 according to an embodiment of the present invention. As shown in Figure 6, the anode of the first diode D1 is electrically connected to the rectified voltage output terminal 121, the cathode of the first diode D1 is electrically connected to the power supply terminal, and an electronic control switch (such as: P-type metal oxide semiconductor 620 ) And the battery 630 are electrically connected between the first diode D1 and the ground terminal. The manual switch SW is connected in series with the battery 630.

In Figure 6, the electrically controlled switch is a P-type metal oxide semiconductor 620, the source of the P-type metal oxide semiconductor 620 is electrically connected to the cathode of the first diode D1, and the gate of the P-type metal oxide semiconductor 620 is electrically connected In the controller 140, the drain of the P-type metal oxide semiconductor 620 is electrically connected to the anode of the second diode D2, the cathode of the second diode D2 is electrically connected to one end of the battery 630, and the other end of the battery 630 is electrically connected to ground The two ends of the manual switch SW are electrically connected to the source of the P-type metal oxide semiconductor 620 and the cathode of the second diode D2, respectively.

Figure 7 is a switch battery according to an embodiment of the invention Block 130 circuit block diagram. As shown in Fig. 7, the anode of the first diode D1 is electrically connected to the rectified voltage output terminal 121, the cathode of the first diode D1 is electrically connected to the power supply terminal VDD, and the electronic control switch (such as: P-type metal oxide semiconductor 720) The battery 730 is electrically connected between the first diode D1 and the ground terminal. The manual switch SW is connected in series with the battery 730.

In Figure 7, the electrically controlled switch is a P-type metal oxide semiconductor 720, the source of the P-type metal oxide semiconductor 720 is electrically connected to the anode of the first diode D1, and the gate of the P-type metal oxide semiconductor 720 is electrically connected In the controller 140, the drain of the P-type metal oxide semiconductor 720 is electrically connected to the anode of the second diode D2, the cathode of the second diode D2 is electrically connected to one end of the battery 730, and the other end of the battery 730 is electrically connected to ground The two ends of the manual switch SW are electrically connected to the cathode of the first diode D1 and the cathode of the second diode D2, respectively.

The lines in Figures 8 to 10 below are the transistor conversion positions of the previous bi-carrier junction transistor (BJT) line. In this sequence, the base-to-collector PN junction of the BJT is forward-conducted, and the battery power may form a loop leakage through the pin CHA of the controller 140, so a second diode D2 is required. If the pins of the controller 140 have no leakage problem, the second diode D2 is not needed.

FIG. 8 is a circuit block diagram of a switch battery block 130 according to an embodiment of the present invention. As shown in Figure 8, the anode of the first diode D1 is electrically connected to the rectified voltage output terminal 121, and the cathode of the first diode D1 is electrically connected to the power supply terminal VDD, and an electronically controlled switch (such as NPN type dual carrier The junction transistor 820) and the battery 830 are electrically connected between the first diode D1 and the ground terminal. The manual switch SW is connected in series with the battery 830.

In Figure 8, the two ends of the resistor 810 are respectively electrically connected to the controller 140 and the electric control switch. The electric control switch is an NPN type two-carrier junction transistor 820, and the cathode of the first diode D1 is electrically connected One end of the battery 830 and the other end of the battery 830 are electrically connected to the anode of the second diode D2, and the cathode of the second diode D2 is electrically connected to the collector of the NPN type bi-carrier junction transistor 820. The NPN type double The base of the carrier junction transistor 820 is electrically connected to the resistor 810, the emitter of the NPN type two-carrier junction transistor 820 is electrically connected to the ground terminal, and the two ends of the manual switch SW are electrically connected to the second diode. The anode of the body D2 is connected to the emitter of the NPN type bicarrier junction transistor 820.

FIG. 9 is a circuit block diagram of a switch battery block 130 according to an embodiment of the present invention. As shown in Figure 9, the anode of the first diode D1 is electrically connected to the rectified voltage output terminal 121, the cathode of the first diode D1 is electrically connected to the power supply terminal VDD, and the electronic control switch (such as: PNP type dual carrier The junction transistor 920) and the battery 930 are electrically connected between the first diode D1 and the ground terminal. The manual switch SW is connected in series with the battery 930.

In Figure 9, the two ends of the resistor 910 are respectively electrically connected to the controller 140 and the electric control switch. The electric control switch is a PNP type bi-carrier junction transistor 920. The cathode of the first diode D1 is electrically connected. Connect the emitter of the PNP type two-carrier junction transistor 920, the base of the PNP type two-carrier junction transistor 920 is electrically connected to the resistor 910, and the collector of the PNP type two-carrier junction transistor 920 is electrically connected The anode of the second diode D2 is connected, the cathode of the second diode D2 is electrically connected to one end of the battery 930, the other end of the battery 930 is electrically connected to the ground terminal, and both ends of the manual switch SW are electrically connected to the PNP type double The emitter of the carrier junction transistor 920 and the end of the battery 930.

FIG. 10 is a circuit block diagram of a switch battery block 130 according to an embodiment of the present invention. As shown in Figure 10, the anode of the first diode D1 is electrically connected to the rectified voltage output terminal 121, the cathode of the first diode D1 is electrically connected to the power supply terminal VDD, and the electronically controlled switch (such as: PNP type dual carrier The junction transistor 1020) and the battery 1030 are electrically connected between the first diode D1 and the ground terminal. The manual switch SW is connected in series with the battery 1030.

In Figure 10, the two ends of the resistor 1030 are respectively electrically connected to the controller 140 and the electric control switch. The electric control switch is a PNP type dual carrier junction transistor 1020, and the anode of the first diode D1 is electrically connected The emitter of the PNP type two-carrier junction transistor 1020, the base of the PNP type two-carrier junction transistor 1020 are electrically connected to the resistor 1010, and the collector of the PNP type two-carrier junction transistor 1020 is electrically connected The anode of the second diode D2 and the cathode of the second diode D2 are electrically connected to one end of the battery 1030, the other end of the battery 1030 is electrically connected to the ground terminal, and both ends of the manual switch SW are electrically connected to the first diode. The cathode of the body D1 is connected to the end of the battery 1030.

The lines in Figures 11 to 13 below are the transistor conversion positions of the previous metal oxide semiconductor (MOSFET) line. It should be understood that if the voltage difference (V _GS ) from the gate to the source of the battery is too small (about 1.0v) and the current from the drain to the source (I _DS ) is insufficient, a low threshold voltage (V _th ) specification can be adopted MOSFET.

FIG. 11 is a circuit block diagram of a switch battery block 130 according to an embodiment of the present invention. As shown in Figure 11, the anode of the first diode D1 is electrically connected to the rectified voltage output terminal 121, the cathode of the first diode D1 is electrically connected to the power supply terminal VDD, and the electronically controlled switch (such as: N-type metal oxide semiconductor 1120) and The battery 1130 is electrically connected between the first diode D1 and the ground terminal. The manual switch SW is connected in series with the battery 1130.

In Figure 11, the electrically controlled switch is an N-type metal oxide semiconductor 1120, the anode of the second diode D2 is electrically connected to the cathode of the first diode D1, and the cathode of the second diode D2 is electrically connected to the N-type The drain of the metal oxide semiconductor 1120, the gate of the N-type metal oxide semiconductor 1120 are electrically connected to the controller 140, the source of the N-type metal oxide semiconductor 1120 is electrically connected to one end of the battery 1130, and the other end of the battery 1130 is electrically connected to ground The two ends of the manual switch SW are electrically connected to the anode of the second diode D2 and the source of the N-type metal oxide semiconductor 1120, respectively.

FIG. 12 is a circuit block diagram of a switching battery block 130 according to an embodiment of the present invention. As shown in Figure 12, the anode of the first diode D1 is electrically connected to the rectified voltage output terminal 121, the cathode of the first diode D1 is electrically connected to the power supply terminal, and an electronic control switch (such as: P-type metal oxide semiconductor 1220 ) And the battery 1230 are electrically connected between the first diode D1 and the ground terminal. The manual switch SW is connected in series with the battery 1230.

In Figure 12, the electrically controlled switch is a P-type metal oxide semiconductor 1220, the cathode of the first diode D1 is electrically connected to one end of the battery 1230, and the other end of the battery 1230 is electrically connected to the source of the P-type metal oxide semiconductor 1220 , The gate electrode of the P-type metal oxide semiconductor 1220 is electrically connected to the controller 140, the drain electrode of the P-type metal oxide semiconductor 1220 is electrically connected to the anode of the second diode D2, and the cathode of the second diode D2 is grounded manually. Both ends of the switch SW are electrically connected to the source of the P-type metal oxide semiconductor 1220 and the cathode of the second diode D2, respectively.

Figure 13 is a switch circuit according to an embodiment of the present invention The circuit block diagram of the pool block 130. As shown in Figure 13, the anode of the first diode D1 is electrically connected to the rectified voltage output terminal 121, the cathode of the first diode D1 is electrically connected to the power supply terminal VDD, and the electronically controlled switch (such as: N-type metal oxide semiconductor 1320) and the battery 1330 are electrically connected between the first diode D1 and the ground terminal. The manual switch SW is connected in series with the battery 1330.

In Figure 13, the electrically controlled switch is an N-type metal oxide semiconductor 1320, the anode of the first diode D1 is electrically connected to the anode of the second diode D2, and the cathode of the second diode D2 is electrically connected to the N-type The drain of the metal oxide semiconductor 1320 and the gate of the N-type metal oxide semiconductor 1320 are electrically connected to the controller 140. The source of the N-type metal oxide semiconductor 1320 is electrically connected to one end of the battery 1330, and the other end of the battery 1330 is electrically connected to ground The two ends of the manual switch SW are electrically connected to the cathode of the first diode D1 and the source of the N-type metal oxide semiconductor 1320, respectively.

In Figures 1-13, intermittent charging can be used, that is, the controller 140 intermittently opens and closes the electric control switch (such as bi-carrier junction transistor or oxygen semiconductor), such as charging for 10 seconds, resting for 3 seconds, Let the electric energy be more completely absorbed, there is a chance to extend the life of the battery.

Returning to FIG. 1, the light-emitting element LED1 (such as a light-emitting diode) is electrically connected to the controller 140. In one embodiment, the light-emitting element LED1 is an indicator light for charging and electric mosquito swatter generally using power. When charging, the controller 140 controls the light-emitting element LED1 to blink at a slow speed (for example, 2 seconds). After being fully charged, the controller 140 controls the light-emitting element LED1 to blink rapidly (for example, 0.5 v second). The traditional electric mosquito swatter requires two light-emitting elements, a charging indicator and a battery power supply. The electric mosquito swatter in this case can be simplified into a single light-emitting element LED1.

On how to measure the voltage of the power supply terminal VDD. If the controller 140 is a microchip (Microchip) (model: PIC12F1571), the reference voltage (VRPOS) directly selects the voltage of the power supply terminal VDD, and the channel selection of the analog-to-digital converter (ADC) can select the internal controller 140 Fixed voltage reference (FVR; Fixed Voltage Reference), there are 1.024v and other voltage options. Or the ADC channel selects a pin connected to the light-emitting element LED1, and uses the forward voltage (Vf) of the light-emitting element LED1 as a fixed voltage. Vf is close to a fixed value within a range of tens of% of the current. The value read by ADC is 65535*FVR/VDD voltage.

In Figure 1, the anode of the Zener diode ZD is electrically connected to the ground terminal VSS, and the cathode of the Zener diode ZD is electrically connected to the power supply terminal VDD. In one embodiment, if the charging circuit in the switch battery block 130 is not turned on, since the controller 140 has low power consumption and high impedance, the voltage division in the series is very high. At this time, the voltage of the power supply terminal VDD is very close to the rectified voltage. The rectified voltage (such as 100v or 200v) provided by the output terminal 121 is to effectively prevent the controller 140 from burning. Therefore, a ZD with a working current of about 15-50mA and 5.5v is required to reduce the voltage when the load is applied. The working current depends on the step-down block 110. For example, 5.5v may be the maximum operating voltage of the general controller 140. When charging, the charging pin CHA of the controller 140 is turned on, and the electronically controlled switch (such as a transistor) in the switch battery block 130 is turned on. Most of the 20mA is consumed by the battery, so the voltage of the power supply terminal VDD will drop to about 4.9 -5.2v or so, depending on how full the battery is.

In Figure 1, one end of the first resistor R1 is electrically connected to the whole For the current voltage output terminal 121, one end of the second resistor R2 is electrically connected to the other end of the first resistor R1, and the other end of the second resistor R2 is electrically connected to the ground. The input pin AC_IN of the controller 140 is electrically connected to the other end of the first resistor R1 and the end of the second resistor R2; in other words, the controller 140 is electrically connected to the rectified voltage output end of the rectifier block 120 through the first resistor R1 121. The controller 140 is electrically connected to the ground terminal 122 of the rectifier block 120 through the second resistor R2. In this way, the controller 140 can quickly determine whether it is currently being charged or used in general. In Figures 2-13, the output of the rectified voltage output terminal 121 (+ pole) of the rectifier block 120 is connected to the first diode D1 to cause unidirectional conduction. The controller 140 can determine whether the pin AC_IN has voltage (such as digital 1 or 0) to determine whether there is a rectified voltage. Due to the voltage drop caused by the forward voltage (Vf) of the first diode D1, the voltage of the power supply terminal VDD is 0.6v lower than the input terminal of the first diode D1. However, if the input pin voltage of the controller 140 (such as PIC12F1571) is greater than the voltage of the power supply terminal VDD, it may cause abnormal operation, so the first resistor R1 and the second resistor R2 are used to divide the voltage to reduce.

In Figures 2-13, when the user presses the manual switch SW, the battery will be directly connected to the power supply terminal VDD or the ground terminal VSS. At this time, the first diode D1 prevents current from flowing to the pin AC_IN, plus the second The resistor R2 is pulled down to the ground, and the controller 140 reads that the voltage of the pin AC_IN is close to zero, and can determine the non-charging state, which is a normal use state.

In practice, the manual switch SW can be a push button switch. Alternatively, the manual switch SW can be connected in series with a push button switch to prevent the user from pressing it by mistake, and the two switches in series can be regarded as the same manual switch SW.

In Figure 1, the voltage stabilizing capacitor C1 is electrically connected between the power supply terminal VDD and the ground terminal VSS. In the experiment, because the input pin AC_IN is blocked by the first diode D1 and the voltage stabilizing capacitor C1, there may still be AC noise (50/60Hz). The actual experiment results have a chance of AC power still exists, but it is read The voltage of pin AC_IN=0. In one embodiment, parallel filter capacitors are one method. Or, it can be solved in the firmware of the controller 140, and the voltage of the pin AC_IN can be read multiple times (for example, 100 times) to avoid misjudgment.

In Figure 1, for best energy efficiency, the rectifier block 120 can be a full-wave bridge rectifier; or, the rectifier block 120 can be a single diode. Both types of rectifiers require a voltage stabilizing capacitor C1 to become direct current so that the controller 140 can perform normally.

FIG. 14 is a circuit block diagram of a step-down block 110 according to an embodiment of the invention. As shown in FIG. 14, the step-down block 110 includes a capacitor C and a resistor R, and the resistor R is connected in parallel with the capacitor C.

For example, the step-down block 110 uses a 0.47-1.0 uF 400V capacitor C (such as a plastic capacitor) in parallel with a resistor R. The reactance of AC at frequency f through capacitor C can be calculated by 1/(2π fC). If it is 0.47uF, 60Hz reactance is 5.6kΩ, 50Hz reactance is about 6.8kΩ. The reactance of the capacitor C does not cause significant heat dissipation like the resistor R, and the plastic capacitor is large in size and easier to dissipate heat. The step-down circuit of the electric mosquito swatter charging circuit on the market is a capacitor (0.47-1uF) with a resistor of 820-1000K in parallel. The function of the resistor R should be 90 degrees out of phase with the capacitor C, which has a somewhat smooth current effect. Because capacitor C, resistor The impedance multiple of R is too different, about 140 times different, and the main current is supplied by capacitor C. Since there is a voltage stabilizing capacitor C1 between the power supply terminal VDD and the power connection terminal VSS in this case, it is possible without this resistor R. Therefore, in another embodiment of the present invention, the step-down block 110 is only the capacitor C without the resistor R.

In the experiment, using the impedance calculation of the step-down block 110 and the three-meter measurement, the average maximum current of this line is less than 50mA. However, in actual experiments, the first diode D1 uses a model BAS21 with an average current of 200mA, and a 250V diode will appear decay and damage after repeated charging, although there is no heat. The reason may be that the instantaneous current exceeds. A diode with an average current of 1A such as model 1N4007 must be used to increase the upper limit of the maximum instantaneous current. The rectifier block 120 also applies the 1A specification structure.

In practice, the controller 140, the ZD, the stabilized capacitor C1 and the light-emitting element LED1 in this case can be shared with the electric mosquito swatter and electric shock output circuit, which can increase the power saving and other multi-functional applications, so it can be realized at a lower cost. More features.

For example, the electric mosquito swatter electric shock output circuit may include a power grid (not shown), and the power grid is electrically connected to the power supply terminal VDD/the power terminal VSS. When in use, the user can operate the manual switch SW to power the battery until the power grid is powered on, so as to shock pests (such as mosquitoes, flies, etc.). In practice, the power grid can be a mesh structure, a fence structure, a hybrid structure of a fence and a mesh, a hole structure or other similar structures. Those who are familiar with this technique can choose flexibly according to the needs of the time.

In summary, the technical solution of the present invention has obvious advantages and beneficial effects compared with the prior art. Compared with the traditional method, the technical solution of the present invention has the following features: 1. The controller 140 controls and switches the battery block 130 to fully charge and disconnect. 2. Charged and fully charged light-emitting element LED1 display; 3. Charging/general use does not require manual switching, the switch battery block 130 automatically switches; 4. The overall circuit is simple.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Anyone familiar with the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection of the present invention The scope shall be subject to those defined in the attached patent scope.

100‧‧‧AC charging and power supply circuit

110‧‧‧Buck block

120‧‧‧rectifier block

121‧‧‧Rectified voltage output terminal

122‧‧‧Ground terminal

130‧‧‧Switch battery block

140‧‧‧Controller

AC_IN‧‧‧input pin

CHA‧‧‧Charging pin

C1‧‧‧Regulating capacitor

LED1‧‧‧Light-emitting element

R1‧‧‧First resistor

R2‧‧‧Second resistor

VDD‧‧‧Power supply terminal

VSS‧‧‧Ground terminal

ZD‧‧‧Sensor diode

Claims (20)

An AC charging and power supply circuit, comprising: a step-down block for receiving an AC power; a rectifier block electrically connected to the step-down block, the rectifier block having a rectified voltage output terminal and a ground terminal; a switch The battery block is electrically connected between a power supply terminal and the ground terminal. The switch battery block includes a first diode, an electronic control switch and a battery. An anode of the first diode is electrically connected Connected to the rectified voltage output terminal, a cathode of the first diode is electrically connected to the power supply terminal, the electronic control switch and the battery are electrically connected between the first diode and the ground terminal; and a control The controller is electrically connected between the power supply terminal and the ground terminal, and the controller is used to control the opening and closing of the electric control switch. The AC charging and power supply circuit according to claim 1, further comprising: an audit diode, an anode of which is electrically connected to the ground terminal, and a cathode of the audit diode is electrically connected to the power supply terminal. The AC charging and power supply circuit described in claim 1, further comprising: a voltage stabilizing capacitor electrically connected between the power supply terminal and the ground terminal. The AC charging and power supply circuit described in claim 1, It further includes: a first resistor, one end of which is electrically connected to the rectified voltage output terminal; and a second resistor, one end of which is electrically connected to the other end of the first resistor, and the other end of the second resistor is electrically connected to the The ground terminal, wherein an input pin of the controller is electrically connected to the other end of the first resistor and the end of the second resistor. The AC charging and power supply circuit according to claim 1, wherein the switch battery block further includes: a manual switch connected in series with the battery. The AC charging and power supply circuit according to claim 5, wherein the switch battery block further comprises: a resistor, both ends of which are electrically connected to the controller and the electric control switch, and the electric control switch is an NPN type A bi-carrier junction transistor, a collector of the NPN-type bi-carrier junction transistor is electrically connected to the cathode of the first diode, and a base electrode of the NPN-type bi-carrier junction transistor is electrically connected Is electrically connected to the resistor, an emitter of the NPN type bi-carrier junction transistor is electrically connected to one end of the battery, the other end of the battery is electrically connected to the ground terminal, and both ends of the manual switch are electrically connected respectively The collector and the emitter of the NPN type bi-carrier junction transistor. The AC charging and power supply circuit according to claim 5, wherein the switch battery block further includes: A resistor, the two ends of which are respectively electrically connected to the controller and the electric control switch, the electric control switch is a PNP type two-carrier junction transistor, and one end of the battery is electrically connected to the first diode The cathode and the other end of the battery are electrically connected to an emitter of the PNP-type bi-carrier junction transistor, and a base of the PNP-type bi-carrier junction transistor is electrically connected to the resistor, the PNP-type A collector of the bi-carrier junction transistor is electrically connected to the ground terminal, and two ends of the manual switch are respectively electrically connected to the emitter and the collector of the PNP-type bi-carrier junction transistor. The AC charging and power supply circuit according to claim 5, wherein the switch battery block further comprises: a resistor, both ends of which are electrically connected to the controller and the electric control switch, and the electric control switch is an NPN type A bi-carrier junction transistor, a collector of the NPN-type bi-carrier junction transistor is electrically connected to the anode of the first diode, and a base electrode of the NPN-type bi-carrier junction transistor Is electrically connected to the resistor, an emitter of the NPN type bi-carrier junction transistor is electrically connected to one end of the battery, the other end of the battery is electrically connected to the ground terminal, and both ends of the manual switch are electrically connected respectively The cathode of the first diode and the end of the battery. The AC charging and power supply circuit of claim 5, wherein the switch battery block further includes: a second diode, wherein the electronically controlled switch is an N-type metal oxide semiconductor, and one end of the battery is electrically connected to the The cathode of the first diode, the other end of the battery is electrically connected to an anode of the second diode, the second diode A cathode of the body is electrically connected to a drain of the N-type MOSFET, a gate of the N-type MOSFET is electrically connected to the controller, and a source of the N-type MOSFET is electrically connected to the ground The two ends of the manual switch are respectively electrically connected to the anode of the second diode and the source of the N-type metal oxide semiconductor. The AC charging and power supply circuit of claim 5, wherein the switch battery block further comprises: a second diode, wherein the electronically controlled switch is a P-type metal oxide semiconductor, and a P-type metal oxide semiconductor The source electrode is electrically connected to the cathode of the first diode, a gate electrode of the P-type metal oxide semiconductor is electrically connected to the controller, and a drain electrode of the P-type metal oxide semiconductor is electrically connected to the second diode An anode of the body, a cathode of the second diode are electrically connected to one end of the battery, the other end of the battery is electrically connected to the ground terminal, and both ends of the manual switch are electrically connected to the P-type metal oxide semiconductor The source of the second diode and the cathode of the second diode. The AC charging and power supply circuit of claim 5, wherein the switch battery block further comprises: a second diode, wherein the electronically controlled switch is a P-type metal oxide semiconductor, and a P-type metal oxide semiconductor The source electrode is electrically connected to the anode of the first diode, a gate electrode of the P-type metal oxide semiconductor is electrically connected to the controller, and a drain electrode of the P-type metal oxide semiconductor is electrically connected to the second diode An anode of the second diode is electrically connected to one end of the battery, the other end of the battery is electrically connected to the ground, and both ends of the manual switch are electrically connected to each other. The cathode of the first diode and the cathode of the second diode are sexually connected. The AC charging and power supply circuit according to claim 5, wherein the switch battery block further comprises: a second diode; and a resistor, both ends of which are electrically connected to the controller and the electric control switch, The electronic control switch is an NPN type bi-carrier junction transistor, the cathode of the first diode is electrically connected to one end of the battery, and the other end of the battery is electrically connected to an anode of the second diode , A cathode of the second diode is electrically connected to a collector of the NPN-type bi-carrier junction transistor, a base of the NPN-type bi-carrier junction transistor is electrically connected to the resistor, the An emitter of the NPN bipolar junction transistor is electrically connected to the ground terminal, and both ends of the manual switch are electrically connected to the anode of the second diode and the NPN bipolar junction transistor. Of the emitter. The AC charging and power supply circuit according to claim 5, wherein the switch battery block further comprises: a second diode; and a resistor, both ends of which are electrically connected to the controller and the electric control switch, The electronic control switch is a PNP type two-carrier junction transistor, the cathode of the first diode is electrically connected to an emitter of the PNP type two-carrier junction transistor, and the PNP type two-carrier junction transistor is A base of the planar transistor is electrically connected to the resistor, and a collector of the PNP type bi-carrier junction transistor is electrically connected to an anode of the second diode, and a cathode of the second diode One end of the battery is electrically connected, and the other end of the battery is electrically connected to the ground. The manual switch The two ends of the switch are respectively electrically connected to the emitter of the PNP type bi-carrier junction transistor and the end of the battery. The AC charging and power supply circuit according to claim 5, wherein the switch battery block further comprises: a second diode; and a resistor, both ends of which are electrically connected to the controller and the electric control switch, The electronic control switch is a PNP type two-carrier junction transistor, the anode of the first diode is electrically connected to an emitter of the PNP type two-carrier junction transistor, and the PNP type two-carrier junction transistor is A base of the planar transistor is electrically connected to the resistor, and a collector of the PNP type bi-carrier junction transistor is electrically connected to an anode of the second diode, and a cathode of the second diode One end of the battery is electrically connected, the other end of the battery is electrically connected to the ground terminal, and both ends of the manual switch are electrically connected to the cathode of the first diode and the end of the battery. The AC charging and power supply circuit according to claim 5, wherein the switch battery block further comprises: a second diode, wherein the electronically controlled switch is an N-type metal oxide semiconductor, and one of the second diode The anode is electrically connected to the cathode of the first diode, a cathode of the second diode is electrically connected to a drain of the N-type metal oxide semiconductor, and a gate of the N-type metal oxide semiconductor is electrically connected In the controller, a source of the N-type metal oxide semiconductor is electrically connected to one end of the battery, the other end of the battery is electrically connected to the ground terminal, and both ends of the manual switch are electrically connected to the second diode. The anode and the source of the N-type metal oxide semiconductor pole. The AC charging and power supply circuit of claim 5, wherein the switch battery block further comprises: a second diode, wherein the electronically controlled switch is a P-type metal oxide semiconductor, and the first diode The cathode is electrically connected to one end of the battery, the other end of the battery is electrically connected to a source of the P-type metal oxide semiconductor, and a gate electrode of the P-type metal oxide semiconductor is electrically connected to the controller. A drain electrode of the semiconductor is electrically connected to an anode of the second diode, a cathode of the second diode is electrically connected to the ground terminal, and both ends of the manual switch are electrically connected to the source of the P-type metal oxide semiconductor. And the cathode of the second diode. The AC charging and power supply circuit of claim 5, wherein the switch battery block further includes: a second diode, wherein the electronically controlled switch is an N-type metal oxide semiconductor, and the first diode The anode is electrically connected to an anode of the second diode, a cathode of the second diode is electrically connected to a drain of the N-type metal oxide semiconductor, and a gate of the N-type metal oxide semiconductor is electrically connected In the controller, a source of the N-type metal oxide semiconductor is electrically connected to one end of the battery, the other end of the battery is electrically connected to the ground terminal, and both ends of the manual switch are electrically connected to the first diode. And the source of the N-type metal oxide semiconductor. The AC charging and power supply circuit described in claim 5 further includes: A light-emitting element is electrically connected to the controller. The AC charging and power supply circuit according to claim 5, wherein the step-down block is a capacitor. The AC charging and power supply circuit according to claim 5, wherein the step-down block includes a capacitor and a resistor, and the resistor is connected in parallel with the capacitor.

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