CN219513815U - Charger circuit - Google Patents
Charger circuit Download PDFInfo
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- CN219513815U CN219513815U CN202320280139.0U CN202320280139U CN219513815U CN 219513815 U CN219513815 U CN 219513815U CN 202320280139 U CN202320280139 U CN 202320280139U CN 219513815 U CN219513815 U CN 219513815U
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Abstract
The utility model discloses a charger circuit, which comprises a first power supply conversion circuit, a first lithium battery pack, a second lithium battery pack and a lithium battery charging and discharging circuit, wherein the input end of the first power supply conversion circuit is connected with a power supply so as to convert an input power supply into a first direct current and output the first direct current; the first lithium battery pack is charged by the first direct current and discharged to the outside. The second lithium battery pack is connected with a first direct current output end of the first power conversion circuit through the lithium battery charging and discharging circuit so as to charge the second lithium battery pack through the first direct current; the second lithium battery pack is also externally discharged under the control of the lithium battery charging and discharging circuit. In this way, the external device is usually powered by the two lithium battery packs separately, and when one lithium battery pack fails, the external device can be normally powered by the other lithium battery pack.
Description
Technical Field
The utility model relates to the technical field of power supply circuits, in particular to a charger circuit.
Background
The charger is a common electronic device in life, and can supply power for other electronic devices after the power supply is subjected to voltage conversion. The existing common electronic equipment generally needs to be connected with commercial power alternating current to charge the electronic equipment, so that mobile charging is inconvenient. In order to facilitate mobile charging, in the prior art, a mobile power supply can be used for providing a power supply for mobile charging. The conventional mobile power supply generally supplies power to external equipment through a group of lithium battery packs, and when the lithium battery packs fail, the external equipment cannot be normally supplied with power.
In addition, the existing mobile power supply generally has only one power output interface to provide an external power supply with a power supply voltage for external equipment, so that the requirement of supplying power to various equipment is difficult to meet.
Disclosure of Invention
The present utility model aims to solve at least one of the technical problems in the related art to some extent. To this end, an object of the present utility model is to propose a charger circuit.
To achieve the above object, an embodiment of the present utility model provides a charger circuit, including:
the input end of the first power supply conversion circuit is connected with a power supply to convert the input power supply into first direct current and output the first direct current;
the first lithium battery pack is connected with a first direct current output end of the first power supply conversion circuit so as to charge the first lithium battery pack through the first direct current and discharge the first lithium battery pack to the outside;
a second lithium battery pack;
the second lithium battery pack is connected with a first direct current output end of the first power conversion circuit through the lithium battery charging and discharging circuit so as to charge the second lithium battery pack through the first direct current; the second lithium battery pack is also externally discharged under the control of the lithium battery charging and discharging circuit.
Further, according to an embodiment of the present utility model, the charger circuit further includes:
a controller;
the electric quantity detection circuit is respectively connected with the first direct current output end and the controller, and the controller detects the electric quantity of the first lithium battery pack and/or the second lithium battery pack through the electric quantity detection circuit;
and the display circuit is connected with the controller to display the electric quantity information under the control of the controller.
Further, according to an embodiment of the present utility model, the first power conversion circuit includes:
the first power interface is used for being connected with a power supply;
the input end of the charging controller is connected with the first power interface so as to convert an input power supply into a power supply;
the power supply output end of the charging controller is connected with the second power supply interface through an inductor L2, a first diode D4 and a first capacitor C16 so as to output converted first direct current, wherein the cathode of the first diode D4 is connected with the power supply output end of the charging controller, the anode of the first diode D4 is connected with the reference ground, one end of the inductor L2 is connected with the power supply output end, the other end of the inductor L2 is connected with the end of the first capacitor C16 through a resistor RS1, and the other end of the first capacitor C16 is connected with the reference ground.
Further, according to an embodiment of the present utility model, the charger circuit further includes:
and the second power supply conversion circuit is connected with the first direct current output end so as to convert the first direct current into second direct current and output the second direct current.
Further, according to an embodiment of the present utility model, the second power conversion circuit includes:
the enabling control end of the power chip is connected with a control end of the controller so as to control the working state under the action of the controller;
the inductor L1, one end of the inductor L1 is connected with the first direct current output end;
the drain electrode of the first MOS tube Q2 is connected with the other end of the inductor L1, the source electrode of the first MOS tube Q2 is connected with the reference ground, and the grid electrode of the first MOS tube Q2 is connected with the pulse width modulation control end of the power supply chip through a first MOS tube driving circuit;
a second diode D1, an anode of the second diode D1 is connected to the other end of the inductor L1;
a second capacitor C12, wherein one end of the second capacitor C12 is connected to the cathode of the second diode D1, and the other end of the second capacitor C12 is connected to the ground;
the source electrode of the second MOS tube Q1 is connected with the cathode of the second diode D1, and the grid electrode of the second MOS tube Q1 is connected with a control end of the controller through a second MOS tube driving circuit;
and the third power interface is connected with the drain electrode of the second MOS tube Q1 so as to lead out the second direct current.
Further, according to an embodiment of the present utility model, the charger circuit further includes:
and the USB power supply circuit is connected with the first direct current output end so as to convert the first direct current into third direct current and output the third direct current.
Further, according to an embodiment of the present utility model, the USB power supply circuit includes:
the input end of the voltage conversion chip is connected with the first direct current output end so as to convert the first direct current into third direct current;
and the power output end of the voltage conversion chip is connected with the USB interface through an inductor L3 so as to lead out the third direct current.
Further, according to an embodiment of the present utility model, the lithium battery charging and discharging circuit includes:
the charge-discharge protection chip is connected with the second lithium battery pack to perform charge-discharge detection on each lithium battery;
the source electrode of the charging MOS tube Q6 is connected with the first direct current output end, and the grid electrode of the charging MOS tube Q6 is connected with the charging control end of the charging and discharging protection chip;
the drain electrode of the discharging MOS tube Q7 is connected with the drain electrode of the charging MOS tube Q6, the source electrode of the discharging MOS tube Q7 is connected with the positive end of the second lithium battery pack, and the grid electrode of the discharging MOS tube Q7 is connected with the discharging control end of the charging and discharging protection chip.
Further, according to an embodiment of the present utility model, the charger circuit further includes:
the key control circuit is connected with the controller, and the controller is also connected with the second power supply conversion circuit so as to perform voltage conversion control on the second power supply conversion circuit under the control of the key control circuit.
Further, according to an embodiment of the present utility model, the controller is further connected to current detection terminals of the second power conversion circuit and the third power conversion circuit, respectively, so as to obtain the current amounts of the second power conversion circuit and the third power conversion circuit, and display the current amount information through the power detection circuit.
The charger circuit provided by the embodiment of the utility model is connected with a power supply through the input end of the first power supply conversion circuit so as to convert the input power supply into first direct current and output the first direct current; the first lithium battery pack is connected with a first direct current output end of the first power supply conversion circuit so as to charge the first lithium battery pack through the first direct current and discharge the first lithium battery pack. The second lithium battery pack is connected with a first direct current output end of the first power conversion circuit through the lithium battery charging and discharging circuit so as to charge the second lithium battery pack through the first direct current; the second lithium battery pack is also externally discharged under the control of the lithium battery charging and discharging circuit. In this way, the external device is usually powered by the two lithium battery packs separately, and when one lithium battery pack fails, the external device can be normally powered by the other lithium battery pack. In addition, through first power conversion circuit, second power conversion circuit and USB power supply circuit, can provide the external power supply of multiple power supply voltage for external equipment, can satisfy the demand to multiple equipment power supply.
Drawings
Fig. 1 is a block diagram of a charger circuit according to an embodiment of the present utility model;
fig. 2 is a schematic diagram of a first power conversion circuit according to an embodiment of the present utility model;
fig. 3 is a schematic diagram of a second power conversion circuit according to an embodiment of the present utility model;
FIG. 4 is a schematic diagram of a USB power circuit according to an embodiment of the present utility model;
fig. 5 is a schematic diagram of a charging and discharging circuit structure of a lithium battery according to an embodiment of the present utility model;
FIG. 6 is a schematic diagram of a display circuit according to an embodiment of the present utility model;
fig. 7 is a schematic diagram of a power detection circuit according to an embodiment of the present utility model;
fig. 8 is a schematic diagram of a controller and key control circuit according to an embodiment of the present utility model.
The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
In order to enable those skilled in the art to better understand the present utility model, the following description will make clear and complete descriptions of the technical solutions according to the embodiments of the present utility model with reference to the accompanying drawings. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the utility model. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
Referring to fig. 1, 2 and 5, an embodiment of the present utility model provides a charger circuit, including: the lithium battery charging and discharging device comprises a first power supply conversion circuit, a first lithium battery pack, a second lithium battery pack and a lithium battery charging and discharging circuit, wherein the input end of the first power supply conversion circuit is connected with a power supply to convert the input power supply into first direct current and output the first direct current; specifically, as shown in fig. 2, in one embodiment of the present utility model, the first power conversion circuit includes: the charging system comprises a first power interface, a charging controller and a second power interface, wherein the first power interface is used for being connected with a power supply; the power supply can be a charger and is connected with the first power supply interface through the charger, so that the output power of the charger can be introduced into the first power supply conversion circuit through the first power supply interface.
The input end of the charging controller is connected with the first power interface so as to convert an input power supply into a power supply; the input power supply voltage of the charger does not necessarily satisfy the charging power supply voltages of the first lithium battery pack and the second lithium battery pack. Therefore, after the introduced charging power supply is subjected to voltage conversion by the charging controller, the power supply voltage can meet the charging voltage of the first lithium battery pack and the second lithium battery pack and is output to the first lithium battery pack and the second lithium battery pack, so that the first lithium battery pack and the second lithium battery pack are charged.
The power output end of the charging controller U1 is connected with the second power interface through an inductor L2, a first diode D4 and a first capacitor C16, so as to output converted first direct current, wherein the cathode of the first diode D4 is connected with the power output end of the charging controller U1, the anode of the first diode D4 is connected with the reference ground, one end of the inductor L2 is connected with the power output end, the other end of the inductor L2 is connected with the end of the first capacitor C16 through a resistor RS1, and the other end of the first capacitor C16 is connected with the reference ground. As shown in fig. 2, a boost circuit may be configured by the charge controller U1, the inductor L2, the first diode D4, and the first capacitor C16, boost-output the power supply voltage in the range of 5.5V-15V of the input direct current, and boost-output the input power supply to a voltage of 12V through the charge controller U1, the inductor L2, the first diode D4, and the first capacitor C16 when the input power supply is less than the voltage of 12V. When the input voltage is 12V or more, the input power is directly output.
The first lithium battery pack BT1 is connected with a first direct current output end of the first power supply conversion circuit so as to charge the first lithium battery pack BT1 through the first direct current and discharge the first lithium battery pack BT to the outside; as shown in fig. 2, the first lithium battery group BT1 is disposed at an output terminal of the first direct current BATT, through which the first lithium battery group BT1 can be directly charged.
The second lithium battery pack is connected with a first direct current output end of the first power conversion circuit through the lithium battery charging and discharging circuit so as to charge the second lithium battery pack through the first direct current; the second lithium battery pack is also externally discharged under the control of the lithium battery charging and discharging circuit. As shown in fig. 5, in one embodiment of the present utility model, the lithium battery charge and discharge circuit includes: the charging and discharging protection chip U3, the charging MOS tube Q6 and the discharging MOS tube Q7 are connected with the second lithium battery pack to perform charging and discharging detection on each lithium battery; specifically, the voltage detection terminals (VC 1 to VC 4) of the charge-discharge protection chip U3 are respectively connected to the second lithium battery packs (BT 2 to BT 4), and may respectively detect charge-discharge voltages of the lithium batteries, so as to detect whether the lithium batteries are overcharged or overdischarged, so as to perform overcharge or overdischarge protection on the lithium batteries, and ensure the service life of the lithium battery packs.
The source electrode of the charging MOS tube Q6 is connected with the first direct current output end, and the grid electrode of the charging MOS tube Q6 is connected with the charging control end of the charging and discharging protection chip; the drain electrode of the discharging MOS tube Q7 is connected with the drain electrode of the charging MOS tube Q6, the source electrode of the discharging MOS tube Q7 is connected with the positive end of the second lithium battery pack, and the grid electrode of the discharging MOS tube Q7 is connected with the discharging control end of the charging and discharging protection chip. As shown in fig. 5, the charge-discharge protection chip U3 realizes sufficient electric control of the second lithium battery pack by controlling on or off of the charge MOS transistor Q6 and the discharge MOS transistor Q7. For example, when charging is required, the charge-discharge protection chip U3 controls the charge MOS transistor Q6 to be turned on through the charge control terminal, and the first direct current may be the second lithium battery pack through the charge MOS transistor Q6 and the discharge MOS transistor Q7 (the discharge MOS transistor Q7 is directly turned on); when charging is needed, the charging and discharging protection chip U3 controls the discharging MOS tube Q7 to be conducted through the charging control end, and the second lithium battery pack can discharge outwards through the discharging MOS tube Q7 and the charging MOS tube Q6 (the charging MOS tube Q6 is directly conducted). When the charge-discharge protection chip U3 detects that the second lithium battery pack is overcharged or overdischarged, the charge MOS tube Q6 or the discharge MOS tube Q7 may be controlled to be turned off so as to stop charging or discharging the second lithium battery pack, thereby protecting the lithium battery pack. In addition, as shown in fig. 2, the first direct current can also be led out through the interface J2, so as to supply power to the external device.
The charger circuit provided by the embodiment of the utility model is connected with a power supply through the input end of the first power supply conversion circuit so as to convert the input power supply into first direct current and output the first direct current; the first lithium battery pack is connected with a first direct current output end of the first power supply conversion circuit so as to charge the first lithium battery pack through the first direct current and discharge the first lithium battery pack. The second lithium battery pack is connected with a first direct current output end of the first power conversion circuit through the lithium battery charging and discharging circuit so as to charge the second lithium battery pack through the first direct current; the second lithium battery pack is also externally discharged under the control of the lithium battery charging and discharging circuit. In this way, the external device is usually powered by the two lithium battery packs separately, and when one lithium battery pack fails, the external device can be normally powered by the other lithium battery pack. In addition, through first power conversion circuit, second power conversion circuit and USB power supply circuit, can provide the external power supply of multiple power supply voltage for external equipment, can satisfy the demand to multiple equipment power supply.
Referring to fig. 1, 6, 7 and 8, the charger circuit further includes: the controller is connected with the first direct current output end and the controller respectively, and detects the electric quantity of the first lithium battery pack and/or the second lithium battery pack through the electric quantity detection circuit; as shown in fig. 7, the power detection circuit includes a resistor R41 and a resistor R42, one end of the resistor R41 is connected to the first dc output terminal BATT, the other end of the resistor R41 is connected to one end of the resistor R42, and the other end of the resistor R42 is connected to the reference ground. The common end of the resistor R41 and the resistor R42 is connected with a detection end of the controller U6, the resistor R41 and the resistor R42 form a voltage dividing circuit, the voltage of the first direct current output end BATT is divided and then output to the detection end BATT_SCAN of the controller U6, so that the electric quantity of the first lithium battery pack and/or the second lithium battery pack can be detected, and the display of the electric quantity or the prompt when the electric quantity is less than a set value can be realized.
The display circuit is connected with the controller to display the electric quantity information under the control of the controller. As shown in fig. 6, the display circuit includes a plurality of LED display lamps, each LED lamp is connected to the control end of the controller U6 through a signal end LED2, LED3, LED4, LED5, LED6, so as to perform on or off control of the LED lamp under the control of the controller U6, thereby indicating the working state of the circuit.
Referring to fig. 1 and 3, the charger circuit further includes: and the second power supply conversion circuit is connected with the first direct current output end so as to convert the first direct current into second direct current and output the second direct current. Although the first direct current of 12V can be led out through the interface J2, and power can be supplied to external equipment. However, in some applications, one 12V power supply may not meet the application requirements. In this embodiment, the second power conversion circuit may input a 19V power supply, and serve as another power supply to supply power to the 19V device. Specifically, as shown in fig. 3, the second power conversion circuit includes: the power supply chip, the inductor L1, the first MOS tube Q2, the second diode D1, the second capacitor C12, the second MOS tube Q1 and the third power supply interface, wherein an enabling control end BR/CTL of the power supply chip U2 is connected with a control end 19V_EN of the controller so as to control the working state under the action of the controller U6; the controller U6 can output a control signal 19V_EN to start or stop the power chip U2. When 19V power is not required to be output externally, the power chip U2 can be controlled to stop working. Therefore, the second direct current is not output by the conversion power supply, electric energy is saved, and safety is guaranteed.
One end of the inductor L1 is connected with the first direct current output end; the drain electrode of the first MOS tube Q2 is connected with the other end of the inductor L1, the source electrode of the first MOS tube Q2 is connected with the reference ground, and the grid electrode of the first MOS tube Q2 is connected with the pulse width modulation control end of the power chip through a first MOS tube driving circuit; the anode of the second diode D1 is connected with the other end of the inductor L1; one end of the second capacitor C12 is connected to the cathode of the second diode D1, and the other end of the second capacitor C12 is connected to the ground.
Specifically, a boost circuit is formed among the power chip, the inductor L1, the first MOS transistor Q2, the second diode D1, and the second capacitor C12, and the boost circuit boosts the 12V power output by the first lithium battery pack or the second lithium battery pack and outputs the boosted power. The inductor L1 is a Boost inductor, the inductor L1 charges and discharges under the action of the first MOS transistor Q2, the Boost power supply outputs the voltage to the second capacitor C12 through the second diode D1, filters the voltage, and outputs a stable 19V voltage v_boost.
The source electrode of the second MOS tube Q1 is connected with the cathode of the second diode D1, and the grid electrode of the second MOS tube Q1 is connected with a control end of the controller through a second MOS tube driving circuit; the second MOS transistor Q1 is disposed on the output loop of the 19V voltage v_boost, and may perform output control on the second dc voltage of the 19V voltage. The second MOS tube driving circuit comprises a triode Q3, the triode Q3 is conducted or cut off under the control of a control signal 19V_EN of the controller U6, so that the conduction or cut-off control of the second MOS tube Q1 is achieved, when 19V_EN is in a high level, the triode Q3 is conducted, the second MOS tube Q1 is conducted, the second direct current is output outwards, otherwise, the second MOS tube Q1 is cut off, and the second direct current is not output outwards. The third power interface J3 is connected to the drain electrode of the second MOS transistor Q1, so as to draw the second direct current, and supply power or charge the device connected to the third power interface J3.
Referring to fig. 1 and 4, the charger circuit further includes: and the USB power supply circuit is connected with the first direct current output end so as to convert the first direct current into third direct current and output the third direct current. The 12V first direct current can be converted into 5V power through the USB power supply circuit, so that the USB equipment is powered or charged. As shown in fig. 4, the USB power supply circuit includes: the input end of the voltage conversion chip is connected with the first direct current output end so as to convert the first direct current into a third direct current of 5V; and the power output end of the voltage conversion chip is connected with the USB interface through an inductor L3 so as to lead out the third direct current.
Referring to fig. 1 and 8, the lithium battery charging and discharging circuit further includes: the key control circuit is connected with the controller U6, and the controller U6 is also connected with the second power conversion circuit so as to perform voltage conversion control on the second power conversion circuit under the control of the key control circuit. That is, the key control circuit may send a control signal to the controller U6, and the controller U6 outputs the 19v_en control signal to the second power conversion circuit, so as to implement conversion and output control of the second direct current of the second power conversion circuit. As shown in fig. 8, the key control circuit includes a control key S1, one end of the control key S1 is connected to the reference ground, the other end of the control key S1 is connected to one end of the controller U6, and the other end of the control key S1 is further connected to the pull-up power supply through a resistor R40, so as to realize control output of high and low level voltages.
Referring to fig. 1, 3, 4 and 8, the controller is further connected to current detection terminals of the second power conversion circuit and the third power conversion circuit, respectively, so as to obtain the current amounts of the second power conversion circuit and the third power conversion circuit, and display the current amount information through the electric quantity detection circuit. As shown in fig. 8, the controller U6 is connected to the current detection terminals of the second power conversion circuit and the third power conversion circuit through ISN and ISN2 signal terminals, respectively, so as to obtain the current amount information of the second power conversion circuit and the third power conversion circuit, thereby realizing detection and display of the supply current.
Although the present utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that the present utility model may be modified or equivalents substituted for some of the features thereof. All equivalent structures made by the content of the specification and the drawings of the utility model are directly or indirectly applied to other related technical fields, and are also within the scope of the utility model.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives, and variations may be made in the above embodiments by those skilled in the art without departing from the spirit and principles of the utility model.
Claims (10)
1. A charger circuit, comprising:
the input end of the first power supply conversion circuit is connected with a power supply to convert the input power supply into first direct current and output the first direct current;
the first lithium battery pack is connected with a first direct current output end of the first power supply conversion circuit so as to charge the first lithium battery pack through the first direct current and discharge the first lithium battery pack to the outside;
a second lithium battery pack;
the second lithium battery pack is connected with a first direct current output end of the first power conversion circuit through the lithium battery charging and discharging circuit so as to charge the second lithium battery pack through the first direct current; the second lithium battery pack is also externally discharged under the control of the lithium battery charging and discharging circuit.
2. The charger circuit of claim 1, further comprising:
a controller;
the electric quantity detection circuit is respectively connected with the first direct current output end and the controller, and the controller detects the electric quantity of the first lithium battery pack and/or the second lithium battery pack through the electric quantity detection circuit;
and the display circuit is connected with the controller to display the electric quantity information under the control of the controller.
3. The charger circuit of claim 1 wherein said first power conversion circuit comprises:
the first power interface is used for being connected with a power supply;
the input end of the charging controller is connected with the first power interface so as to convert an input power supply into a power supply;
the power supply output end of the charging controller is connected with the second power supply interface through an inductor (L2), a first diode (D4) and a first capacitor (C16), so that converted first direct current is output, wherein the cathode of the first diode (D4) is connected with the power supply output end of the charging controller, the anode of the first diode (D4) is connected with the reference ground, one end of the inductor (L2) is connected with the power supply output end, the other end of the inductor (L2) is connected with the end of the first capacitor (C16) through a resistor RS1, and the other end of the first capacitor (C16) is connected with the reference ground.
4. The charger circuit of claim 2, further comprising:
and the second power supply conversion circuit is connected with the first direct current output end so as to convert the first direct current into second direct current and output the second direct current.
5. The charger circuit of claim 4 wherein said second power conversion circuit comprises:
the enabling control end of the power chip is connected with a control end of the controller so as to control the working state under the action of the controller;
an inductor (L1), wherein one end of the inductor (L1) is connected with the first direct current output end;
the first MOS tube (Q2), the drain electrode of the first MOS tube (Q2) is connected with the other end of the inductor (L1), the source electrode of the first MOS tube (Q2) is connected with the reference ground, and the grid electrode of the first MOS tube (Q2) is connected with the pulse width modulation control end of the power chip through a first MOS tube driving circuit;
-a second diode (D1), the anode of said second diode (D1) being connected to said other end of said inductance (L1);
a second capacitor (C12), one end of the second capacitor (C12) is connected to the cathode of the second diode (D1), and the other end of the second capacitor (C12) is connected to the ground;
the source electrode of the second MOS tube (Q1) is connected with the cathode of the second diode (D1), and the grid electrode of the second MOS tube (Q1) is connected with a control end of the controller through a second MOS tube driving circuit;
and the third power interface is connected with the drain electrode of the second MOS tube (Q1) so as to lead out the second direct current.
6. The charger circuit of claim 1, further comprising:
and the USB power supply circuit is connected with the first direct current output end so as to convert the first direct current into third direct current and output the third direct current.
7. The charger circuit of claim 6 wherein said USB power supply circuit comprises:
the input end of the voltage conversion chip is connected with the first direct current output end so as to convert the first direct current into third direct current;
and the power output end of the voltage conversion chip is connected with the USB interface through an inductor L3 so as to lead out the third direct current.
8. The charger circuit of claim 1 wherein said lithium battery charging and discharging circuit comprises:
the charge-discharge protection chip is connected with the second lithium battery pack to perform charge-discharge detection on each lithium battery;
the source electrode of the charging MOS tube (Q6) is connected with the first direct current output end, and the grid electrode of the charging MOS tube (Q6) is connected with the charging control end of the charging and discharging protection chip;
the discharging MOS tube (Q7), the drain electrode of discharging MOS tube (Q7) with the drain electrode of charging MOS tube (Q6) is connected, the source electrode of discharging MOS tube (Q7) with the positive end of second lithium cell group is connected, the grid electrode of discharging MOS tube (Q7) with the discharge control end of charging and discharging protection chip is connected.
9. The charger circuit of claim 4 further comprising:
the key control circuit is connected with the controller, and the controller is also connected with the second power supply conversion circuit so as to perform voltage conversion control on the second power supply conversion circuit under the control of the key control circuit.
10. The charger circuit of claim 4 wherein the controller is further connected to current detecting terminals of the second and third power conversion circuits, respectively, to obtain the amounts of current of the second and third power conversion circuits and to display the amounts of current information via the power detection circuits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320280139.0U CN219513815U (en) | 2023-02-03 | 2023-02-03 | Charger circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320280139.0U CN219513815U (en) | 2023-02-03 | 2023-02-03 | Charger circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219513815U true CN219513815U (en) | 2023-08-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320280139.0U Active CN219513815U (en) | 2023-02-03 | 2023-02-03 | Charger circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219513815U (en) |
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2023
- 2023-02-03 CN CN202320280139.0U patent/CN219513815U/en active Active
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