Charging circuit of shared charging cabinet and shared charging system

Abstract

The utility model relates to a charging circuit of a shared charging cabinet and a shared charging system. The charging circuit comprises a first switching circuit, a second switching circuit and a protection circuit. The first switching circuit is used for receiving the first switch control signal and switching on or switching off the first switching circuit according to the first switch control signal; the second switching circuit is used for receiving a second switch control signal and switching on or switching off the second switching circuit according to the second switch control signal; wherein the voltage of the second power supply is greater than that of the first power supply; the protection circuit is used for providing a charging power supply for the to-be-charged assembly through the first power supply under the condition that the first switching circuit is switched on and the second switching circuit is switched off; and when the first switching circuit is switched off and the second switching circuit is switched on, the charging power supply is provided for the to-be-charged assembly through the second power supply, so that the charging requirements of two types of power banks of quick charging and slow charging can be met at the same time, and the flexibility of the charging circuit is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery charging, in particular to a charging circuit of a shared charging cabinet and a shared charging system. BACKGROUND

[0002] With the wide use of mobile devices, portable charging solutions such as power banks are becoming more and more popular. In order to meet the needs of users for fast charging, power banks supporting fast charging protocols have appeared in the market. However, most of the power bank cabinets on the market still use fixed voltage power supplies to charge the power banks, which limits their support ability for different charging needs. Especially when facing the coexistence of fast charging and slow charging power banks, the traditional charging cabinet lacks the necessary flexibility to provide the best charging experience.

[0003] At present, there is no effective solution to the problem that the traditional charging cabinet cannot simultaneously meet the charging needs of fast charging and slow charging power banks. CONTENT OF THE UTILITY MODEL

[0004] Therefore, it is necessary to provide a charging circuit of a shared charging cabinet and a shared charging system in view of the above technical problems.

[0005] In a first aspect, the present application provides a charging circuit of a shared charging cabinet, which comprises a first switching circuit, a second switching circuit and a protection circuit.

[0006] The first end of the first switching circuit is used to be connected with the first control end of the master control circuit, the second end of the first switching circuit is used to be connected with the first power supply, the third end of the first switching circuit is connected with the first end of the protection circuit, and the first switching circuit is used to receive the first switch control signal generated by the master control circuit and turn on or turn off the first switching circuit according to the first switch control signal.

[0007] The first end of the second switching circuit is used to be connected with the second control end of the master control circuit, the second end of the second switching circuit is used to be connected with the second power supply, the third end of the second switching circuit is connected with the second end of the protection circuit, and the second switching circuit is used to receive the second switch control signal generated by the master control circuit and turn on or turn off the second switching circuit according to the second switch control signal; wherein the voltage of the second power supply is greater than the voltage of the first power supply.

[0008] The second end of the protection circuit is used for connecting with a component to be charged, and the protection circuit is used for providing a charging power supply for the component to be charged through the first power supply in a case that the first switch circuit is turned on and the second switch circuit is turned off; and providing the charging power supply for the component to be charged through the second power supply in a case that the first switch circuit is turned off and the second switch circuit is turned on.

[0009] In one of the embodiments, the first switch circuit comprises a switch component, a first filter circuit, a second filter circuit and a ground protection circuit; wherein the switch component is provided with an enable end, an input end and an output end;

[0010] The enable end of the switch component is used for connecting with a first control end of a master control circuit, the input end of the switch component is used for connecting with a first power supply, and the output end of the switch component is connected with a first end of the protection circuit; and the switch component is used for turning on or turning off the switch component according to the first switch control signal.

[0011] One end of the first filter circuit is connected with the input end of the switch component, and the other end of the first filter circuit is grounded.

[0012] One end of the second filter circuit is connected with a connection point of the output end of the switch component and the first end of the protection circuit, and the other end of the second filter circuit is grounded.

[0013] One end of the ground protection circuit is connected with the enable end of the switch component, and the other end of the ground protection circuit is grounded.

[0014] In one of the embodiments, the first filter circuit comprises a first capacitor and a second capacitor; the second filter circuit comprises a third capacitor and a fourth capacitor; and the ground protection circuit comprises a first resistor.

[0015] One end of the first capacitor is connected with the input end of the switch component, and the other end of the first capacitor is grounded; and the second capacitor is connected in parallel to both ends of the first capacitor.

[0016] One end of the third capacitor is connected with the connection point of the output end of the switch component and the first end of the protection circuit, and the other end of the third capacitor is grounded; and the fourth capacitor is connected in parallel to both ends of the third capacitor.

[0017] One end of the first resistor is connected with the enable end of the switch component, and the other end of the first resistor is grounded.

[0018] In one of the embodiments, the second switch circuit comprises a first switch circuit and a second switch circuit.

[0019] The first end of the first switch circuit is used for connecting with the second master end of the master circuit, the second end of the first switch circuit is connected with the first end of the second switch circuit, and the third end of the first switch circuit is grounded; the first switch circuit is used for turning on or turning off the first switch circuit according to the second switch control signal;

[0020] The second end of the second switch circuit is used for connecting with the second power supply, and the third end of the second switch circuit is connected with the second end of the protection circuit; the second switch circuit is used for turning on or turning off the second switch circuit according to the on-off state of the first switch circuit.

[0021] In one of the embodiments, the first switch circuit comprises a first switch tube, a second resistance and a third resistance;

[0022] One end of the second resistance is used for connecting with the second master end of the master circuit, and the other end of the second resistance is connected with the base of the first switch tube;

[0023] The collector of the first switch tube is connected with the first end of the second switch circuit, and the emitter of the first switch tube is grounded;

[0024] One end of the third resistance is connected with the connection point of the base of the first switch tube and the second resistance, and the other end of the third resistance is connected with the emitter of the first switch tube.

[0025] In one of the embodiments, the second switch circuit comprises a second switch tube, a fourth resistance and a fifth capacitor;

[0026] The gate of the second switch tube is connected with the collector of the first switch tube, the source of the second switch tube is used for connecting with the second power supply, and the drain of the second switch tube is connected with the second end of the protection circuit;

[0027] One end of the fourth resistance is connected with the gate of the second switch tube, and the other end of the fourth resistance is connected with the source of the second switch tube;

[0028] The fifth capacitor is connected in parallel to the two ends of the fourth resistance.

[0029] In one of the embodiments, the first switch tube is an NPN triode;

[0030] The second switch tube is a PMOS tube.

[0031] In one of the embodiments, the protection circuit comprises an anti-reverse circuit and a third filter circuit;

[0032] The first end of the anti-reverse circuit is connected with the third end of the first switching circuit, and the second end of the anti-reverse circuit is connected with the third end of the second switching circuit; and the connection point of the second end of the anti-reverse circuit and the third end of the second switching circuit is used for being connected with the component to be charged.

[0033] One end of the third filtering circuit is connected with the connection point of the second end of the anti-reverse circuit and the third end of the second switching circuit, and the other end of the third filtering circuit is grounded.

[0034] In one embodiment, the anti-reverse circuit includes a diode; and the third filtering circuit includes a sixth capacitor and a seventh capacitor.

[0035] The positive electrode of the diode is connected with the third end of the first switching circuit, and the negative electrode of the diode is connected with the third end of the second switching circuit; and the connection point of the negative electrode of the diode and the third end of the second switching circuit is used for being connected with the component to be charged.

[0036] One end of the sixth capacitor is connected with the connection point of the negative electrode of the diode and the third end of the second switching circuit, and the other end of the sixth capacitor is grounded; and the seventh capacitor is connected in parallel to both ends of the sixth capacitor.

[0037] In a second aspect, the application further provides a shared charging system, which includes a master control circuit and one or more charging circuits as described in any of the above embodiments.

[0038] The master control circuit is connected with the charging circuit and is used for providing corresponding first switch control signals and second switch control signals to the charging circuit.

[0039] The charging circuit of the shared charging cabinet and the shared charging system described above, the charging circuit includes a first switching circuit, a second switching circuit and a protection circuit; based on the conduction characteristics of the first switching circuit and the second switching circuit, the first switching circuit is turned on, and the second switching circuit is turned off, the first power supply is used to provide a charging power supply to the component to be charged; in the case of the first switching circuit being turned off and the second switching circuit being turned on, the second power supply is used to provide a charging power supply to the component to be charged, wherein the voltage of the second power supply is greater than the voltage of the first power supply; based on this, the charging needs of both fast charging and slow charging types of power banks can be met at the same time, and the flexibility of the charging circuit is improved. BRIEF DESCRIPTION OF DRAWINGS

[0040] In order to make the technical scheme of the embodiments of the present application or the related art clearer, the accompanying drawings needed to be used in the description of the embodiments of the present application or the related art will be briefly introduced. Obviously, the accompanying drawings in the following description only show some embodiments of the present application, and for those skilled in the art, other related drawings can be obtained without any creative effort based on these drawings.

[0041] Figure 1 FIG. 1 is a schematic diagram of a charging circuit shared by a charging cabinet according to an embodiment of the present application;

[0042] Figure 2 FIG. 2 is a schematic diagram of a charging circuit shared by a charging cabinet according to another embodiment of the present application;

[0043] Figure 3 FIG. 3 is a schematic diagram of a charging circuit shared by a charging cabinet according to an embodiment of the present application.

[0044] Legend of reference signs:

[0045] 100, main control circuit; 200, charging circuit; 210, first switching circuit; 220, second switching circuit; 230, protection circuit; 211, switching component; 212, first filter circuit; 213, second filter circuit; 214, ground protection circuit; 221, first switching circuit; 222, second switching circuit; 231, anti-reverse circuit; 232, third filter circuit; 300, component to be charged. DETAILED DESCRIPTION

[0046] In order to make the technical scheme of the embodiments of the present application or the related art clearer, the accompanying drawings needed to be used in the description of the embodiments of the present application or the related art will be briefly introduced. Obviously, the accompanying drawings in the following description only show some embodiments of the present application, and for those skilled in the art, other related drawings can be obtained without any creative effort based on these drawings.

[0047] In one embodiment, as shown in FIG. 1, Figure 1 Figure 1 FIG. 1 is a schematic diagram of a charging circuit shared by a charging cabinet according to an embodiment of the present application; the charging circuit 200 comprises a first switching circuit 210, a second switching circuit 220 and a protection circuit 230;

[0048] The first end of the first switching circuit 210 is used to be connected with the first main control end CHARGE1 of the main control circuit 100, the second end of the first switching circuit 210 is used to be connected with the first power supply VCC1, the third end of the first switching circuit 210 is connected with the first end of the protection circuit 230, the first switching circuit 210 is used to receive the first switching control signal generated by the main control circuit 100, and the first switching circuit 210 is turned on or turned off according to the first switching control signal;

[0049] ​The first end of the second switch circuit 220 is used for being connected with the second control end CHARGE2 of the master control circuit 100, the second end of the second switch circuit 220 is used for being connected with the second power supply VCC2, and the third end of the second switch circuit 220 is connected with the second end of the protection circuit 230. The second switch circuit 220 is used for receiving the second switch control signal generated by the master control circuit 100 and turning on or turning off the second switch circuit 220 according to the second switch control signal. The voltage of the second power supply VCC2 is greater than the voltage of the first power supply VCC1.

[0050] The second end of the protection circuit 230 is used for being connected with the component to be charged (not shown in the figure). The protection circuit 230 is used for providing the charging power supply to the component to be charged through the first power supply VCC1 when the first switch circuit 210 is turned on and the second switch circuit 220 is turned off. The protection circuit 230 is used for providing the charging power supply to the component to be charged through the second power supply VCC2 when the first switch circuit 210 is turned off and the second switch circuit 220 is turned on.

[0051] The master control circuit 100 can include but is not limited to a master control chip. The master control chip can be but is not limited to an MCU (Microcontroller Unit) or other control chip, which is not limited here. It can be understood that the master control circuit 100 is an external circuit corresponding to the charging circuit 200, and the master control circuit 100 is not included in the charging circuit 200.

[0052] It should be noted that in actual application, the master control circuit 100 can generate corresponding control signals according to the charging type of the component to be charged. The control signals include the first switch control signal and the second switch control signal. The component to be charged can be a shared power bank, which is not limited here. The charging type of the component to be charged includes fast charging type and slow charging type.

[0053] The first switch control signal is a logic level signal, that is, the first switch control signal can be a high level signal or a low level signal. The second switch control signal is a logic level signal, that is, the second switch control signal can be a high level signal or a low level signal. It should be noted that the level state of the first switch control signal and the second switch control signal is related to the charging type of the component to be charged.

[0054] The first switching circuit 210 has a conduction characteristic. The state of the first switching circuit 210 includes a conduction state and an off state. The first switching circuit 210 can be turned on or turned off according to the first switch control signal. For example, when the first switch control signal is a high-level signal, the first switching circuit 210 is controlled to be in the conduction state. When the first switch control signal is a low-level signal, the first switching circuit 210 is controlled to be in the off state.

[0055] The first power supply VCC1 is a direct current power supply. The first power supply VCC1 can be, but is not limited to, a 5V power supply, which is not specifically limited here.

[0056] The second switching circuit 220 has a conduction characteristic. The state of the second switching circuit 220 includes a conduction state and an off state. The second switching circuit 220 can be turned on or turned off according to the second switch control signal. For example, when the second switch control signal is a high-level signal, the second switching circuit 220 is controlled to be in the conduction state. When the second switch control signal is a low-level signal, the second switching circuit 220 is controlled to be in the off state.

[0057] The second power supply VCC2 is a direct current power supply. The second power supply VCC2 can be, but is not limited to, a 12V power supply, which is not specifically limited here.

[0058] It should be noted that the voltage of the second power supply VCC2 must be greater than the voltage of the first power supply VCC1, based on which the charging needs of both fast charging and slow charging can be met at the same time.

[0059] The protection circuit 230 has a one-way conduction characteristic. When the first switching circuit 210 is turned off and the second switching circuit 220 is turned on, the protection circuit 230 can ensure that the second power supply VCC2 provides a charging power supply to the component to be charged at the same time, prevents the second power supply VCC2 from flowing back to the first switching circuit 210 or the main control circuit 100, and causes damage to the charging circuit 200 or the main control circuit 100, effectively improving the reliability and safety of the charging circuit 200.

[0060] Exemplarily, in actual application, the charging circuit 200 needs to be connected with the master control circuit 100, the first power supply VCC1, the second power supply VCC2 and the component to be charged respectively; the master control circuit 100 can generate the first switch control signal and the second switch control signal according to the charging type of the component to be charged, and transmit the first switch control signal to the first end of the first switch circuit 210 through the first master control end CHARGE1, and transmit the second switch control signal to the first end of the second switch circuit 220 through the second master control end CHARGE2; then, according to the level state of the first switch control signal, the first switch circuit 210 can be controlled to be turned on or turned off; according to the level state of the second switch control signal, the second switch circuit 220 can be controlled to be turned on or turned off; further, according to the on-off state of the first switch circuit 210 and the second switch circuit 220, the component to be charged can be provided with the charging power source matched with its charging type; specifically, in the case that the first switch circuit 210 is turned on and the second switch circuit 220 is turned off, the component to be charged is provided with the charging power source corresponding to slow charging through the first power supply VCC1; in the case that the first switch circuit 210 is turned off and the second switch circuit 220 is turned on, the component to be charged is provided with the charging power source corresponding to fast charging through the second power supply VCC2.

[0061] In the embodiment, based on the turn-on characteristics of the first switch circuit 210 and the second switch circuit 220, the component to be charged can be provided with the charging power source matched with its charging type, the charging demand of the power bank of both fast charging and slow charging types can be met at the same time, and the flexibility of the charging circuit 200 is improved; at the same time, based on the protection circuit 230, the risk of damage to the charging circuit 200 or the master control circuit 100 caused by the voltage backflow to the first switch circuit 210 or the master control circuit 100 can be effectively avoided, and the reliability and safety of the charging circuit 200 are effectively improved.

[0062] In one embodiment, as shown in Figure 2 Figure 2 is a whole structure diagram of the charging circuit of the shared charging cabinet in another embodiment; the first switch circuit 210 includes a switch component 211, a first filter circuit 212, a second filter circuit 213 and a ground protection circuit 214; wherein the switch component 211 is provided with an enable end, an input end and an output end;

[0063] The enable end of the switch component 211 is used for being connected with the first master control end CHARGE1 of the master control circuit 100, the input end of the switch component 211 is used for being connected with the first power supply VCC1, and the output end of the switch component 211 is connected with the first end of the protection circuit 230; the switch component 211 is used for turning on or turning off the switch component 211 according to the first switch control signal;

[0064] ​One end of the first filter circuit 212 is connected with the input end of the switch component 211, and the other end of the first filter circuit 212 is grounded.

[0065] One end of the second filter circuit 213 is connected with the connection point of the output end of the switch component 211 and the first end of the protection circuit 230, and the other end of the second filter circuit 213 is grounded.

[0066] One end of the ground protection circuit 214 is connected with the enable end of the switch component 211, and the other end of the ground protection circuit 214 is grounded.

[0067] The switch component 211 has a conduction characteristic, and the state of the switch component 211 includes a conduction state and an off state. The switch component 211 can be, but is not limited to, an electronic load switch, which is not specifically limited herein. For example, the switch component 211 can be a power electronic switch with a model number of SY6288CAAC. Optionally, when the first switch control signal received by the enable end of the switch component 211 is a low-level signal, the switch component 211 is in the off state; and when the first switch control signal received by the enable end of the switch component 211 is a high-level signal, the switch component 211 is in the conduction state.

[0068] The first filter circuit 212 and the second filter circuit 213 both have a filtering function and an energy storage function.

[0069] The ground protection circuit 214 is configured to pull down the level of the enable end of the switch component 211, so that the switch component 211 is in the off state by default.

[0070] For example, in actual application, when the second switch circuit 220 is in the off state, the switch component 211 is in the conduction state when the first switch control signal is a high-level signal. At this time, the first power supply VCC1 is transmitted to the first end of the protection circuit 230 through the switch component 211, and is transmitted to the to-be-charged component 300 from the second end of the protection circuit 230, so as to provide a charging power supply for the to-be-charged component 300. When the second switch circuit 220 is in the on state, the switch component 211 is in the off state when the first switch control signal is a low-level signal. At this time, the first power supply VCC1 cannot pass through the switch component 211, and thus cannot be transmitted to the protection circuit 230.

[0071] In this embodiment, based on the conduction characteristic of the switch component 211, the on-off state of the switch component 211 can be accurately controlled according to the level state of the first switch control signal, which lays a foundation for improving the reliability of the charging circuit 200.

[0072] In one embodiment, as shown in Figure 3 Figure 3 ​A circuit schematic diagram of a charging circuit shared by a charging cabinet in an embodiment; a first filter circuit 212 includes a first capacitor C1 and a second capacitor C2; a second filter circuit 213 includes a third capacitor C3 and a fourth capacitor C4; a ground protection circuit 214 includes a first resistor R1;

[0073] One end of the first capacitor C1 is connected to the input end IN of the switch assembly 211, and the other end of the first capacitor C1 is grounded; the second capacitor C2 is connected in parallel to the two ends of the first capacitor C1;

[0074] One end of the third capacitor C3 is connected to the connection point of the output end OUT of the switch assembly 211 and the first end of the protection circuit 230, and the other end of the third capacitor C3 is grounded; the fourth capacitor C4 is connected in parallel to the two ends of the third capacitor C3;

[0075] One end of the first resistor R1 is connected to the enable end EN of the switch assembly 211, and the other end of the first resistor R1 is grounded.

[0076] Optionally, the switch assembly 211 is a power electronic switch, and the switch assembly 211 is provided with an input end IN, an output end OUT and an enable end EN. It should be noted that the switch assembly 211 also reserves a fault detection end OCB, and the fault detection end OCB is not formally used in the embodiment, so it is connected to the ground through the fifth resistor R5.

[0077] Among them, the first capacitor C1, the second capacitor C2, the third capacitor C3 and the fourth capacitor C4 are filter capacitors; it should be noted that the capacitance of the first capacitor C1, the second capacitor C2, the third capacitor C3 and the fourth capacitor C4 needs to be set according to actual needs, which is not limited here. For example, the capacitance of the first capacitor C1 and the third capacitor C3 is 22μf; the capacitance of the second capacitor C2 and the fourth capacitor C4 is 100nf.

[0078] Among them, the first resistor R1 is used to pull down the enable end EN of the switch assembly 211, so that the switch assembly 211 defaults to an off state.

[0079] It should be noted that the resistance of the first resistor R1 needs to be set according to the actual performance of the switch assembly 211, which is not limited here; for example, the resistance of the first resistor R1 is 10KΩ.

[0080] Optionally, the voltage of the first power supply VCC1 is 5V.

[0081] Exemplarily, in actual application, when the first switch control signal is a high level signal, the enable end EN of the switch component 211 is in a high level state, the switch component 211 is in a conductive state, that is, the input end IN of the switch component 211 is turned on, at this time, the first power supply VCC1 is transmitted to the output end OUT of the switch component 211, and then transmitted to the first end of the protection circuit 230 through the output end OUT of the switch component 211, and then transmitted to the to-be-charged component 300 through the second end of the protection circuit 230, so as to provide a charging power supply for the to-be-charged component 300, when the second switch control signal is a low level signal, the enable end EN of the switch component 211 is in a low level state, the switch component 211 is in an off state, that is, the input end IN of the switch component 211 is turned off, at this time, the first power supply VCC1 cannot pass through the switch component 211, and then cannot be transmitted to the protection circuit 230.

[0082] In the embodiment, based on the first filter circuit 212 and the second filter circuit 213, signal interference in the charging circuit 200 can be effectively filtered out, and the reliability of the charging circuit 200 is further improved.

[0083] In one embodiment, referring to Figure 2 The second switch circuit 220 includes a first switch circuit 221 and a second switch circuit 222.

[0084] The first end of the first switch circuit 221 is used to be connected with the second control end CHARGE2 of the master control circuit 100, the second end of the first switch circuit 221 is connected with the first end of the second switch circuit 222, and the third end of the first switch circuit 221 is grounded; the first switch circuit 221 is used to turn on or turn off the first switch circuit 221 according to the second switch control signal.

[0085] The second end of the second switch circuit 222 is used to be connected with the second power supply VCC2, and the third end of the second switch circuit 222 is connected with the second end of the protection circuit 230; the second switch circuit 222 is used to turn on or turn off the second switch circuit 222 according to the on-off state of the first switch circuit 221.

[0086] The first switch circuit 221 has a conductive characteristic; the state of the first switch circuit 221 includes a conductive state and an off state; exemplarily, when the second switch control signal is a high level signal, the first switch circuit 221 is in a conductive state; when the second switch control signal is a low level signal, the first switch circuit 221 is in an off state.

[0087] The second switch circuit 222 has a conduction characteristic. The second switch circuit 222 has a conduction state and a non-conduction state. The second switch circuit 222 is switched on or off according to the on-off state of the first switch circuit. For example, when the first switch circuit 221 is in the conduction state, the second switch circuit 222 is in the conduction state. When the first switch circuit 221 is in the non-conduction state, the second switch circuit 222 is in the non-conduction state.

[0088] For example, in actual application, when the first switch circuit 210 is in the non-conduction state, the second switch control signal is a high-level signal, the first switch circuit 221 is in the conduction state, and the second switch circuit 222 is in the conduction state. At this time, the second power supply VCC2 flows into the second end of the protection circuit 230 through the second switch circuit 222, and provides a corresponding charging power to the component to be charged 300 through the second end of the protection circuit 230. When the first switch circuit 210 is in the conduction state, the second switch control signal is a low-level signal, the first switch circuit 221 is in the non-conduction state, and the second switch circuit 222 is in the non-conduction state. At this time, the second power supply VCC2 cannot pass through the second switch circuit 222, and thus cannot flow into the second end of the protection circuit 230.

[0089] In this embodiment, based on the conduction characteristic of the first switch circuit 221 and the second switch circuit 222, the on-off state of the first switch circuit 221 can be accurately controlled according to the level state of the second switch control signal, and the on-off state of the second switch circuit 222 can be accurately controlled according to the on-off state of the first switch circuit 221, thereby laying a foundation for improving the reliability of the charging circuit 200.

[0090] In one embodiment, referring to Figure 3 The first switch circuit 221 includes a first switch tube Q1, a second resistor R2, and a third resistor R3.

[0091] One end of the second resistor R2 is used to be connected with the second control end CHARGE2 of the main control circuit 100, and the other end of the second resistor R2 is connected with the base of the first switch tube Q1.

[0092] The collector of the first switch tube Q1 is connected with the first end of the second switch circuit 222, and the emitter of the first switch tube Q1 is grounded.

[0093] One end of the third resistor R3 is connected with the connection point of the base of the first switch tube Q1 and the second resistor R2, and the other end of the third resistor R3 is connected with the emitter of the first switch tube Q1.

[0094] Preferably, the first switch tube Q1 is an NPN type triode.

[0095] The first switch tube Q1 has a conduction characteristic.

[0096] The second resistor R2 is a current-limiting resistor, and the third resistor R3 is a pull-down resistor. It should be noted that the resistance values of the second resistor R2 and the third resistor R3 need to be set according to the performance of the first switch tube Q1, and are not specifically limited here.

[0097] The second switch circuit 222 includes a second switch tube Q2, a fourth resistor R4, and a fifth capacitor C5.

[0098] The gate of the second switch tube Q2 is connected to the collector of the first switch tube Q1, the source of the second switch tube Q2 is used to be connected to the second power supply VCC2, and the drain of the second switch tube Q2 is connected to the second end of the protection circuit 230.

[0099] One end of the fourth resistor R4 is connected to the gate of the second switch tube Q2, and the other end of the fourth resistor R4 is connected to the source of the second switch tube Q2.

[0100] The fifth capacitor C5 is connected in parallel to the two ends of the fourth resistor R4.

[0101] Preferably, the second switch tube Q2 is a PMOS tube.

[0102] The second switch tube Q2 has a conduction characteristic.

[0103] The fourth resistor R4 is a pull-up resistor, and the fifth capacitor C5 is a filter resistor. It should be noted that the resistance value of the fourth resistor R4 and the capacitance value of the fifth capacitor C5 need to be set according to the performance of the second switch tube Q2, and are not specifically limited here.

[0104] In an exemplary embodiment, in practical application, the first switch tube Q1 is an NPN triode, the second switch tube Q2 is a PMOS tube, and the voltage of the second power supply VCC2 is 12V; when the first switching circuit 210 is off, the second switch control signal is a high-level signal, the base of the first switch tube Q1 is pulled high, the first switch tube Q1 is in a conductive state, and the gate of the second switch tube Q2 is connected to the ground through the collector and the emitter of the first switch tube Q1; at this time, since the source of the second switch tube Q2 is connected to the second power supply VCC2, the gate voltage of the second switch tube Q2 is less than the source voltage, the second switch tube Q2 is in a conductive state, the second power supply VCC2 flows into the second end of the protection circuit 230 through the second switch tube Q2, and the corresponding charging power is provided to the component to be charged 300 through the second end of the protection circuit 230. When the first switching circuit 210 is on, the second switch control signal is a low-level signal, the base of the first switch tube Q1 is pulled low, the first switch tube Q1 is in an off state, the gate of the second switch tube Q2 is pulled high by the second power supply VCC2 through the fourth resistor R4, the second switch tube Q2 is in an off state, and the second power supply VCC2 cannot flow into the second end of the protection circuit 230 through the second switch circuit 222.

[0105] In this embodiment, according to the level state of the second switch control signal, the on-off state of the first switch tube Q1 can be reliably controlled, and then according to the channel state of the first switch tube Q1, the on-off state of the second switch tube Q2 can be accurately and reliably controlled, so as to provide the corresponding charging power for the component to be charged 300 by the second power supply VCC2 when the first switching circuit 210 is off, and the reliability of the charging circuit 200 is further improved.

[0106] In one embodiment, referring to Figure 2 , the protection circuit 230 includes an anti-reverse circuit 231 and a third filter circuit 232;

[0107] The first end of the anti-reverse circuit 231 is connected to the third end of the first switching circuit 210, and the second end of the anti-reverse circuit 231 is connected to the third end of the second switching circuit 220; the connection point of the second end of the anti-reverse circuit 231 and the third end of the second switching circuit 220 is used to be connected to the component to be charged 300;

[0108] One end of the third filter circuit 232 is connected to the connection point of the second end of the anti-reverse circuit 231 and the third end of the second switching circuit 220, and the other end of the third filter circuit 232 is grounded.

[0109] The anti-reverse circuit 231 has a one-way conductivity, which is used to prevent the voltage from flowing back to the first switching circuit 210 or the main control circuit 100 in practical application.

[0110] Preferably, referring to Figure 3 , the anti-reverse circuit comprises a diode D1; the third filter circuit comprises a sixth capacitor C6 and a seventh capacitor C7;

[0111] The positive electrode of the diode D1 is connected to the third terminal of the first switching circuit 210, and the negative electrode of the diode D1 is connected to the third terminal of the second switching circuit 220; the connection point of the negative electrode of the diode D1 and the third terminal of the second switching circuit 220 is used to be connected to the to-be-charged component 300;

[0112] One end of the sixth capacitor C6 is connected to the connection point of the negative electrode of the diode D1 and the third terminal of the second switching circuit 220, and the other end of the sixth capacitor C6 is grounded; the seventh capacitor C7 is connected in parallel to the two ends of the sixth capacitor C6.

[0113] Among them, the diode D1 has unidirectional conductivity. The sixth capacitor C6 and the seventh capacitor C7 are both filter capacitors, and the capacitance values of the sixth capacitor C6 and the seventh capacitor C7 need to be set according to actual needs, which are not specifically limited here. For example, the capacitance value of the sixth capacitor C6 is 10μf, and the capacitance value of the seventh capacitor C7 is 100nf.

[0114] Exemplarily, in the actual application, when the first switching circuit 210 is turned on and the second switching circuit 220 is turned off, the first power supply VCC1 is transmitted to the positive electrode of the diode D1 through the first switching circuit 210, the diode D1 is in a conductive state, and the first power supply VCC1 provides a corresponding charging power to the to-be-charged component 300 through the diode D1. At this time, since the second switching circuit 220 is in an off state, the first power supply VCC1 will not flow back to the main control circuit 100, effectively avoiding the risk of damage to the main control circuit 100 caused by voltage backflow; in the case that the first switching circuit 210 is turned off and the second switching circuit 220 is turned on, the second power supply VCC2 provides a corresponding charging power to the to-be-charged component 300 through the second switching circuit 220; at this time, due to the unidirectional conductivity of the diode D1, the second power supply VCC2 will not flow back from the negative electrode of the diode D1 to the first switching circuit 210, effectively avoiding the risk of damage to the first switching circuit 210 caused by voltage backflow.

[0115] In this embodiment, based on the anti-reverse circuit 231, in the case that the first switching circuit 210 is turned off and the second switching circuit 220 is turned on, the risk of damage to the first switching circuit 210 caused by voltage backflow to the first switching circuit 210 can be effectively avoided, further improving the reliability and safety of the charging circuit 200.

[0116] In one specific embodiment, referring to Figure 3, the master control circuit 100 can generate the corresponding first switch control signal and the second switch control signal according to the charging type of the component to be charged 300; assuming that the voltage of the first power supply VCC1 is 5V, and the voltage of the second power supply VCC2 is 12V; the first switch tube Q1 is an NPN triode, and the second switch tube Q2 is a PMOS tube. It should be noted that, Figure 3 VOUT in the VOUT is used to connect the component to be charged 300.

[0117] If the charging type of the component to be charged 300 is a slow charging type, the first switch control signal generated by the master control circuit 100 according to the charging type is a high-level signal, and the second switch control signal is a low-level signal; at this time, the first switch control signal is transmitted to the enable end EN of the switch component 211 through the first master control end CHARGE1 of the master control circuit 100, controlling the switch component 211 to be in the on state, the first power supply VCC1 is transmitted to the anode of the diode D1 through the switch component 211, the diode D1 is in the on state, the first power supply VCC1 is transmitted to VOUT through the diode D1, and the charging power supply is provided for the component to be charged 300 through VOUT; the voltage range of VOUT output is between 4.75-5.25V. At the same time, the second switch control signal is transmitted to the first switch tube Q1 through the second master control end CHARGE2 of the master control circuit 100, controlling the first switch tube Q1 to be in the off state, when the first switch tube Q1 is in the off state, the gate of the second switch tube Q2 is pulled up to the second power supply VCC2 through the fourth resistor R4, so the second switch tube Q2 is also in the off state, and the second power supply VCC2 cannot pass through the second switch tube Q2. Therefore, when the charging type of the component to be charged 300 is a slow charging type, only the first power supply VCC1 can provide a charging power supply for the component to be charged 300.

[0118] If the charging type of the to-be-charged component 300 is a fast charging type, the first switch control signal generated by the master control circuit 100 according to the charging type is a low-level signal, and the second switch control signal is a high-level signal; at this time, the first switch control signal is transmitted to the enable end EN of the switch component 211 through the first master control end CHARGE1 of the master control circuit 100, so as to control the switch component 211 to be in an off state, and the first power supply VCC1 cannot be transmitted to the diode D1 through the switch component 211, so that the diode D1 is in an off state. At the same time, since the second switch control signal is a high-level signal, the first switch tube Q1 is in a conductive state, the gate of the second switch tube Q2 is connected to the ground through the first switch tube Q1, and the source of the second switch tube Q2 is connected to the second power supply VCC2, so that the second switch tube Q2 is in a conductive state, and the second power supply VCC2 is transmitted to VOUT through the second switch tube Q2, and the to-be-charged component 300 is provided with a charging power supply through VOUT. Therefore, when the charging type of the to-be-charged component 300 is a fast charging type, since the switch component 211 and the diode D1 are both in an off state, only the second power supply VCC2 can provide a charging power supply for the to-be-charged component 300.

[0119] The charging circuit of the shared charging cabinet can provide the to-be-charged component 300 with a charging power supply matched with the charging type of the to-be-charged component 300 based on the conductive characteristics of the first switch circuit 210 and the second switch circuit 220, can simultaneously meet the charging needs of the power bank of the fast charging and slow charging types, improves the flexibility of the charging circuit 200, and can effectively avoid the risk of voltage backflow to the first switch circuit 210 or the master control circuit 100, thereby effectively improving the reliability and safety of the charging circuit 200.

[0120] In one embodiment, the shared charging system comprises a master control circuit and one or more charging circuits in any of the above embodiments.

[0121] The master control circuit is connected with the charging circuit, and is used to provide the charging circuit with corresponding first and second switch control signals.

[0122] It should be noted that the specific connection relationship between the master control circuit and the charging circuit is the same as the connection relationship described in the above embodiments, and will not be described here.

[0123] The master control circuit can include, but is not limited to, a master control chip; the master control chip can be, but is not limited to, an MCU or other control chip, and is not limited here.

[0124] It should be noted that the main control circuit can generate a corresponding control signal according to the charging type of the to-be-charged component; wherein the control signal includes a first switch control signal and a second switch control signal; the to-be-charged component can be a shared power bank, which is not limited here; the charging type of the to-be-charged component includes fast charging type and slow charging type.

[0125] It should be noted that in actual application, the charging circuit needs to be connected with the first power supply and the second power supply; wherein the voltage of the second power supply is greater than the voltage of the first power supply; based on the first power supply, a corresponding slow charging source can be provided for the to-be-charged component; based on the second charging power supply, a corresponding fast charging source can be provided for the to-be-charged component.

[0126] In the embodiment, based on the main control circuit, accurate control signals can be provided for the charging circuit, and then based on the charging circuit, the charging requirements of the fast charging and slow charging two types of power banks can be met at the same time, and the flexibility of the shared charging system is improved.

[0127] Unless otherwise defined, 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 application belongs. The terminology used in the description herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0128] It can be understood that the terms "first", "second", etc. used in the present application can be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish the first element from another element. For example, without departing from the scope of the present application, the first resistor can be called the second resistor, and similarly, the second resistor can be called the first resistor. The first resistor and the second resistor are both resistors, but they are not the same resistor.

[0129] It can be understood that "connection" in the following embodiments means that the circuits, modules, units, etc. connected with each other have the transmission of electrical signals or data, and should be understood as "electrical connection", "communication connection", etc.

[0130] It can be understood that "at least one" means one or more, and "multiple" means two or more. "At least part of the element" means part or all of the element.

[0131] As used herein, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. It will be further understood that the terms "comprises", "comprising", "includes" and / or "including", as well as the terms "has" and / or "having", when used herein, specify the presence of stated features, integers, steps, operations, elements, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, parts, combinations thereof, or the like.

[0132] In the description of the present specification, the description referring to the terms "some embodiments", "other embodiments", etc. means that the particular feature, structure, material, or characteristic being referred to is included in at least one embodiment or example of the present application. The appearance of the above terms in various places in the specification are not necessarily referring to the same embodiment or example.

[0133] The technical features of the above embodiments can be combined in any manner. For the sake of brevity, not all possible combinations of the technical features of the above embodiments are described, however, it is understood that any combination of the technical features is possible unless the combination is contradictory.

[0134] The above-described embodiments are merely illustrative of several embodiments of the present application and do not limit the scope of the present application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present application, and such modifications and improvements should be considered within the scope of the present application. Therefore, the scope of the present application should be defined by the appended claims.

Claims

1. A charging circuit of a shared charging cabinet, characterized in that, The charging circuit comprises a first switching circuit, a second switching circuit and a protection circuit; The first end of the first switching circuit is used for being connected with the first master control end of the master control circuit, the second end of the first switching circuit is used for being connected with the first power supply, the third end of the first switching circuit is connected with the first end of the protection circuit, the first switching circuit is used for receiving the first switch control signal generated by the master control circuit, and the first switching circuit is turned on or turned off according to the first switch control signal; The first end of the second switching circuit is used for being connected with the second master control end of the master control circuit, the second end of the second switching circuit is used for being connected with the second power supply, the third end of the second switching circuit is connected with the second end of the protection circuit, the second switching circuit is used for receiving the second switch control signal generated by the master control circuit, and the second switching circuit is turned on or turned off according to the second switch control signal; wherein the voltage of the second power supply is greater than the voltage of the first power supply; The second end of the protection circuit is used for being connected with the component to be charged, and the protection circuit is used for providing the charging power supply for the component to be charged through the first power supply when the first switching circuit is turned on and the second switching circuit is turned off; and the protection circuit is used for providing the charging power supply for the component to be charged through the second power supply when the first switching circuit is turned off and the second switching circuit is turned on.

2. The charging circuit of claim 1, wherein, The first switching circuit comprises a switch component, a first filter circuit, a second filter circuit and a ground protection circuit; wherein the switch component is provided with an enable end, an input end and an output end; The enable end of the switch component is used for being connected with the first master control end of the master control circuit, the input end of the switch component is used for being connected with the first power supply, and the output end of the switch component is connected with the first end of the protection circuit; the switch component is used for turning on or turning off the switch component according to the first switch control signal; One end of the first filter circuit is connected with the input end of the switch component, and the other end of the first filter circuit is grounded; One end of the second filter circuit is connected with the connection point of the output end of the switch component and the first end of the protection circuit, and the other end of the second filter circuit is grounded; One end of the ground protection circuit is connected with the enable end of the switch component, and the other end of the ground protection circuit is grounded.

3. The charging circuit of claim 2, wherein, The first filter circuit comprises a first capacitor and a second capacitor; the second filter circuit comprises a third capacitor and a fourth capacitor; and the ground protection circuit comprises a first resistor; One end of the first capacitor is connected with the input end of the switch component, and the other end of the first capacitor is grounded; the second capacitor is connected in parallel to both ends of the first capacitor; One end of the third capacitor is connected with the connection point of the output end of the switch component and the first end of the protection circuit, and the other end of the third capacitor is grounded; the fourth capacitor is connected in parallel to both ends of the third capacitor; One end of the first resistor is connected with the enable end of the switch component, and the other end of the first resistor is grounded.

4. The charging circuit of claim 1, wherein, The second switch circuit comprises a first switch circuit and a second switch circuit; The first end of the first switch circuit is connected with the second control end of the master control circuit, the second end of the first switch circuit is connected with the first end of the second switch circuit, and the third end of the first switch circuit is grounded; the first switch circuit is used for turning on or turning off the first switch circuit according to the second switch control signal; The second end of the second switch circuit is connected with the second power supply, and the third end of the second switch circuit is connected with the second end of the protection circuit; the second switch circuit is used for turning on or turning off the second switch circuit according to the on-off state of the first switch circuit.

5. The charging circuit of claim 4, wherein, The first switch circuit comprises a first switch tube, a second resistor and a third resistor; One end of the second resistor is connected with the second control end of the master control circuit, and the other end of the second resistor is connected with the base of the first switch tube; The collector of the first switch tube is connected with the first end of the second switch circuit, and the emitter of the first switch tube is grounded; One end of the third resistor is connected with the connection point of the base of the first switch tube and the second resistor, and the other end of the third resistor is connected with the emitter of the first switch tube.

6. The charging circuit of claim 5, wherein, The second switch circuit comprises a second switch tube, a fourth resistor and a fifth capacitor; The gate of the second switch tube is connected with the collector of the first switch tube, the source of the second switch tube is connected with the second power supply, and the drain of the second switch tube is connected with the second end of the protection circuit; One end of the fourth resistor is connected with the gate of the second switch tube, and the other end of the fourth resistor is connected with the source of the second switch tube; The fifth capacitor is connected in parallel to the two ends of the fourth resistor.

7. The charging circuit according to claim 6, wherein The first switch tube is an NPN triode; The second switch tube is a PMOS tube.

8. The charging circuit of claim 1, wherein, The protection circuit comprises an anti-reverse circuit and a third filter circuit; The first end of the anti-reverse circuit is connected with the third end of the first switch circuit, the second end of the anti-reverse circuit is connected with the third end of the second switch circuit, and the connection point of the second end of the anti-reverse circuit and the third end of the second switch circuit is connected with the component to be charged; One end of the third filter circuit is connected with the connection point of the second end of the anti-reverse circuit and the third end of the second switch circuit, and the other end of the third filter circuit is grounded.

9. The charging circuit of claim 8, wherein, The anti-reverse circuit comprises a diode, and the third filter circuit comprises a sixth capacitor and a seventh capacitor; The anode of the diode is connected with the third end of the first switch circuit, and the cathode of the diode is connected with the third end of the second switch circuit; the connection point of the cathode of the diode and the third end of the second switch circuit is connected with the component to be charged; One end of the sixth capacitor is connected with the connection point of the cathode of the diode and the third end of the second switch circuit, and the other end of the sixth capacitor is grounded; the seventh capacitor is connected in parallel to the two ends of the sixth capacitor.

10. A shared charging system, characterized by, The shared charging system comprises a master control circuit and one or more charging circuits according to any one of claims 1-9; The master control circuit is connected with the charging circuit, and is configured to provide the charging circuit with corresponding first switch control signals and second switch control signals.

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