Reverse power supply system of power conversion cabinet and power conversion cabinet

Abstract

The utility model relates to a reverse power supply system of a battery changing cabinet and the battery changing cabinet, the reverse power supply system of the battery changing cabinet comprises a DCDC conversion circuit, a reverse output circuit and a voltage conversion circuit, the DCDC conversion circuit is provided with a change-over switch, the voltage conversion circuit is provided with a first fuse, a step-down voltage stabilizer, a first TVS tube and a commercial power detection circuit, one end of the first TVS tube is grounded, and the other end of the first TVS tube is grounded. The other end of the first TVS tube is connected with the battery, the change-over switch is respectively connected with the step-down voltage stabilizer and the reverse output circuit, one end of the first fuse is connected with the battery, and the step-down voltage stabilizer is respectively connected with the other end of the first fuse and the mains supply detection circuit. The mains supply detection circuit monitors the connection state of the mains supply, when the power conversion cabinet is not connected with the mains supply, the change-over switch acts and then connects the battery with the reverse output circuit, the power conversion cabinet can still provide normal battery borrowing and returning for a user through the battery when no mains supply is supplied, meanwhile, the power supply can be rapidly cut off through the first fuse wire in the case of abnormity, and the safety of the power conversion cabinet is improved. And the reverse power supply safety is improved.

Description

Technical Field

[0001] The present application relates to the field of lithium battery charging technology, and in particular, to a reverse power supply system of a battery swap cabinet and a battery swap cabinet. Background Art

[0002] In recent years, consumers' demand for online shopping and food delivery has increased, fueling the booming food delivery market and the widespread adoption of shared electric bikes. Consequently, electric bikes are becoming increasingly popular for both material delivery and daily commuting, leading to a surge in demand for battery swap cabinets. However, when a battery swap cabinet is installed at a designated location and cannot immediately connect to a 220V power source, the entire cabinet is disconnected from the 220V power source and has no charging function. This makes it difficult for users to borrow or return batteries, impacting the user experience. Utility Model Content

[0003] The purpose of this application is to provide a reverse power supply system and a battery swap cabinet to solve the problem that it is difficult for users to borrow and return batteries when the battery swap cabinet is not connected to a 220V power supply.

[0004] In order to solve the above problems, this application adopts the following technical solutions:

[0005] The present application provides a reverse power supply system for a battery swap cabinet, including: a DCDC conversion circuit, a reverse output circuit and a voltage conversion circuit. The DCDC conversion circuit is provided with a switching switch, and the voltage conversion circuit is provided with a first fuse, a buck regulator, a first TVS tube and a mains detection circuit. One end of the first TVS tube is grounded, and the other end of the first TVS tube is connected to the battery. The switching switch is respectively connected to the buck regulator and the reverse output circuit, one end of the first fuse is connected to the battery, and the buck regulator is respectively connected to the other end of the first fuse and the mains detection circuit. When the battery swap cabinet is not connected to the mains, the switching switch is switched so that the battery is connected to the reverse output circuit to supply power to the battery swap cabinet.

[0006] Furthermore, the AC power detection circuit includes a first transistor, a first resistor and a second resistor, the collector of the first transistor is connected to the buck regulator, the two ends of the first resistor are respectively connected to the AC power and the base of the first transistor, the two ends of the second resistor are respectively connected to the base and emitter of the first transistor, and the emitter of the first transistor is grounded.

[0007] Furthermore, the resistance values ​​of the first resistor and the second resistor are consistent.

[0008] Furthermore, the reverse output circuit includes a second fuse, a MOS tube and a capacitive circuit. The switching switch, the second fuse, the MOS tube and one end of the capacitive circuit are connected in sequence, and the other end of the capacitive circuit is used to power the power exchange cabinet.

[0009] Furthermore, the reverse output circuit includes a second TVS tube, one end of the second TVS tube is grounded, and the other end of the second TVS tube is connected to the switch.

[0010] Furthermore, the reverse output circuit includes a second triode, a third resistor and a fourth resistor, the second fuse, the third resistor, the fourth resistor and the base of the second triode are connected in sequence, the emitter of the second triode is connected to the source of the MOS tube, and the collector of the second triode is connected to the gate of the MOS tube.

[0011] Furthermore, the reverse output circuit includes a diode, one end of the diode is grounded, and the other end of the diode is connected to the third resistor.

[0012] Furthermore, the reverse output circuit includes a fifth resistor, one end of the fifth resistor is grounded, and the other end of the fifth resistor is connected to the collector of the second transistor and the gate of the MOS transistor respectively.

[0013] Furthermore, the capacitive reactance circuit includes an electrolytic capacitor and a fixed capacitor, one end of the electrolytic capacitor and one end of the fixed capacitor are both connected to the drain of the MOS tube, and the other end of the electrolytic capacitor and the other end of the fixed capacitor are both grounded.

[0014] The present application also provides a battery exchange cabinet, comprising a reverse power supply system of any of the above-mentioned battery exchange cabinets.

[0015] Compared with the existing technology, the beneficial effect of this application is that: through the AC power detection circuit, the connection status of the AC power can be monitored in real time, and the battery is connected to the reverse output circuit after the switching switch is actuated. When there is no AC power supply, the battery swap cabinet can still provide users with normal battery borrowing and returning services through the battery. At the same time, through the first fuse, the power supply can be quickly cut off in an abnormality, thereby improving the safety of reverse power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of a voltage conversion circuit provided in an embodiment of the present application;

[0017] Figure 2 A schematic diagram of a reverse output circuit provided in an embodiment of the present application;

[0018] Figure 3A schematic diagram of a DCDC conversion circuit provided in an embodiment of the present application; and

[0019] Figure 4 A system block diagram of a reverse power supply system for a battery swap cabinet provided in an embodiment of the present application.

[0020] Description of reference numerals:

[0021] 100, DCDC conversion circuit; 110, switching switch; 200, reverse output circuit; 210, second fuse; 220, MOS tube; 230, capacitive reactance circuit; 240, second TVS tube; 250, second tertiary tube; 260, third resistor; 270, fourth resistor; 280, diode; 290, fifth resistor; 300, voltage conversion circuit; 310, first fuse; 320, buck regulator; 330, first TVS tube; 340, AC power detection circuit; 341, first transistor; 342, first resistor; 343, second resistor. DETAILED DESCRIPTION

[0022] The specific implementation methods of this application are described in detail below with reference to the accompanying drawings.

[0023] It should be noted that, unless there is a conflict, the embodiments and technical features in the embodiments of this application can be combined with each other, and the detailed description in the specific implementation method should be understood as an explanation of the purpose of this application and should not be regarded as an improper restriction on this application.

[0024] It should be understood that the orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings. These orientation terms are only used to facilitate the description of this application and simplify the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they should not be understood as limiting this application.

[0025] Figure 1 A schematic diagram of a voltage conversion circuit provided in an embodiment of the present application is shown. Figure 2 A schematic diagram of a reverse output circuit provided in an embodiment of the present application is shown. Figure 3 A schematic diagram of a DCDC conversion circuit provided in an embodiment of the present application is shown. Figure 4 A system block diagram of a reverse power supply system for a battery swap cabinet provided in an embodiment of the present application.

[0026] like Figures 1 to 4As shown, an embodiment of the present application provides a reverse power supply system for a battery swap cabinet, including: a DCDC conversion circuit 100, a reverse output circuit 200 and a voltage conversion circuit 300. The DCDC conversion circuit 100 is provided with a switching switch 110, and the voltage conversion circuit 300 is provided with a first fuse 310, a buck regulator 320, a first TVS tube 330 and a mains detection circuit 340. One end of the first TVS tube 330 is grounded, and the other end of the first TVS tube 330 is connected to the battery. The switching switch 110 is respectively connected to the buck regulator 320 and the reverse output circuit 200, one end of the first fuse 310 is connected to the battery, and the buck regulator 320 is respectively connected to the other end of the first fuse 310 and the mains detection circuit 340. When the battery swap cabinet is not connected to the mains, the switching switch 110 is switched so that the battery is connected to the reverse output circuit 200 to supply power to the battery swap cabinet.

[0027] Specifically, at the installation site of the power exchange cabinet, after the installation of the power exchange cabinet is completed, since the 220V power supply cannot be connected at the first time, the entire power exchange cabinet is not connected to the 220V power supply, and the power exchange cabinet has no charging function. At this time, it is difficult for users to use the battery borrowing and returning function. In the reverse power supply system of the embodiment of the present application, the DCDC conversion circuit 100 includes a switching switch 110. The switching switch 110 can switch from the mains power supply mode to the power exchange cabinet mode to the battery power supply mode. When the mains power detection circuit 340 detects that the power exchange cabinet is not connected to the mains power, the switching switch 110 performs a switching action to connect the battery to the reverse output circuit 200. For example, when the power exchange cabinet is placed in the cabinet at a selected address and the 220V power supply cannot be connected at the first time, the reverse power supply system will be started. When a lithium battery is present in any battery compartment or multiple battery compartments of the battery swap cabinet, the lithium battery is reversely converted by the charging adapter through the charging cable, and then the 48V output port of the charging adapter is used to reversely power the detection board, 4G board, and warehouse control board. This allows the entire battery swap cabinet to allow users to borrow and return batteries without charging before the 220V power supply is connected. The voltage conversion circuit 300 includes a first fuse 310, a buck regulator 320, a first TVS diode 330, and a mains detection circuit 340. The battery is connected to the DCDC conversion circuit 100, one end of the first TVS diode 330 is grounded, and the other end of the first TVS diode 330 is connected to the battery. The switch 110 is connected to the buck regulator 320 and the reverse output circuit 200, connecting one end of the first fuse 310 to the battery and the other end to the buck regulator 320. The buck regulator 320 is connected to the mains detection circuit 340.

[0028] It should be understood that when the battery swap cabinet is not connected to the mains power, the switching switch 110 is actuated to connect the battery to the reverse output circuit 200. When there is no mains power supply, the battery swap cabinet can still provide users with normal battery borrowing and returning services through the battery. At the same time, through the first fuse 310, the power supply can be quickly cut off in an abnormality, thereby improving the safety of reverse power supply.

[0029] In some embodiments, the AC power detection circuit 340 includes a first transistor 341, a first resistor 342 and a second resistor 343. The collector of the first transistor 341 is connected to the buck regulator 320, the two ends of the first resistor 342 are respectively connected to the AC power and the base of the first transistor 341, the two ends of the second resistor 343 are respectively connected to the base and emitter of the first transistor 341, and the emitter of the first transistor 341 is grounded.

[0030] Specifically, the collector of the first transistor 341 is connected to the chip pin EN of the buck regulator 320, the battery is connected to the VIN pin, and the two ends of the first resistor 342 are respectively connected to the mains and the base of the first transistor 341, so that when the mains changes, the first transistor 341 can receive the corresponding signal, and the two ends of the second resistor 343 are respectively connected to the base and emitter of the first transistor 341 to limit the current. It should be noted that the resistance values ​​of the first resistor 342 and the second resistor 343 can be adjusted according to the use requirements to adapt to the mains detection requirements of different voltage levels. In particular, the resistance values ​​of the first resistor 342 and the second resistor 343 are consistent.

[0031] The mains detection circuit 340 detects the mains power status through a first transistor 341, a first resistor 342, and a second resistor 343, and feeds the detection result back to the buck regulator 320 and other related circuits for corresponding operations. When the mains detection circuit 340 detects that the mains power is not supplied, the detection result is fed back, and the switch 110 of the DCDC converter circuit 100 performs the switching action.

[0032] In some embodiments, the reverse output circuit 200 includes a second fuse 210, a MOS tube 220 and a capacitive circuit 230. The switching switch 110, the second fuse 210, the MOS tube 220 and one end of the capacitive circuit 230 are connected in sequence, and the other end of the capacitive circuit 230 is used to power the power exchange cabinet.

[0033] Specifically, capacitive reactance circuit 230 is connected to VCC_12V, which supplies power to the power exchange cabinet. One end of capacitive reactance circuit 230 is grounded. Capacitive reactance circuit 230 is connected to the drain of MOS transistor 220, the gate of MOS transistor 220 is grounded, and second fuse 210 is connected to the source of MOS transistor 220. Switch 110 controls the opening and closing of reverse output circuit 200, providing users with convenient battery borrowing and returning operations. Capacitive reactance circuit 230 protects the circuit from grid interference, improving system stability.

[0034] In some embodiments, the reverse output circuit 200 includes a second TVS diode 240, one end of which is grounded, and the other end of which is connected to the switch 110. For example, one end of the second TVS diode 240 is grounded, and the other end of the second TVS diode 240 is connected to 12V_OUT, which is connected to the 12V_OUT pin of the switch 110 of the DCDC converter circuit 100. Since one end of the second TVS diode 240 is grounded, it provides protection for circuits and devices, suppressing voltage surges or overvoltages and protecting circuits from damage.

[0035] In some embodiments, the reverse output circuit 200 includes a second triode 250, a third resistor 260 and a fourth resistor 270, the second fuse 210, the third resistor 260, the fourth resistor 270 and the base of the second triode 250 are connected in sequence, the emitter of the second triode 250 is connected to the source of the MOS tube 220, and the collector of the second triode 250 is connected to the gate of the MOS tube 220.

[0036] Specifically, the emitter of second triode 250 is connected to the source of MOS transistor 220, and the collector of second triode 250 is connected to the gate of MOS transistor 220. A resistor is connected between the emitter and collector of second triode 250, and the resistor is connected to the source and gate of MOS transistor 220. 12V_OUT is connected to the source of MOS transistor 220 after passing through second fuse 210, and the drain of MOS transistor 220 is connected to VCC_12V. Through second triode 250 and MOS transistor 220, reverse output circuit 200 can quickly respond to changes in the input signal and flexibly turn on and off, ensuring stable operation of the circuit.

[0037] In some embodiments, the reverse output circuit 200 includes a diode 280, one end of the diode 280 is grounded, and the other end of the diode 280 is connected to the third resistor 260. Due to the reverse blocking characteristics of the diode 280, it can only pass in one direction, for example, from 12V_OUT, through the second fuse 210, and the fourth resistor 270 to the base of the second transistor 250.

[0038] In some embodiments, the reverse output circuit 200 includes a fifth resistor 290 , one end of which is grounded, and the other end of which is connected to the collector of the second transistor 250 and the gate of the MOS transistor 220 .

[0039] Specifically, one end of the fifth resistor 290 is grounded, and the other end of the fifth resistor 290 is respectively connected to the collector of the second transistor 250, the gate of the MOS transistor 220, and another resistor. The other resistor is connected to the source and gate of the MOS transistor 220. By grounding one end of the fifth resistor 290, signal transmission is optimized and loss is reduced.

[0040] In some embodiments, capacitive reactance circuit 230 includes an electrolytic capacitor 231 and a fixed capacitor 232. One end of electrolytic capacitor 231 and one end of fixed capacitor 232 are both connected to the drain of MOS transistor 220, and the other ends of electrolytic capacitor 231 and the other ends of fixed capacitor 232 are both grounded. For example, the capacitance of electrolytic capacitor 231 is 220 μF, and the capacitance of fixed capacitor 232 is 0.1 μF. The negative electrode of electrolytic capacitor 231 is grounded, and the positive electrode of electrolytic capacitor 231 is connected to the drain of MOS transistor 220 and VCC_12V. Electrolytic capacitor 231 and fixed capacitor 232 effectively suppress noise, improve the quality of the output signal, and enhance stability.

[0041] An embodiment of the present application also provides a battery exchange cabinet, including a reverse power supply system of any of the above-mentioned battery exchange cabinets.

[0042] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the above embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the above embodiments, or to replace some of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions claimed to be protected by the present application.

Claims

1. A reverse power supply system for a power exchange cabinet, characterized in that: include: DCDC conversion circuit, reverse output circuit and voltage conversion circuit, the DCDC conversion circuit is provided with a switching switch, the voltage conversion circuit is provided with a first fuse, a buck regulator, a first TVS tube and a mains detection circuit, one end of the first TVS tube is grounded, and the other end of the first TVS tube is connected to the battery, the switching switch is respectively connected to the buck regulator and the reverse output circuit, one end of the first fuse is connected to the battery, and the buck regulator is respectively connected to the other end of the first fuse and the mains detection circuit. When the power exchange cabinet is not connected to the mains, the switching switch is switched so that the battery is connected to the reverse output circuit to supply power to the power exchange cabinet.

2. The reverse power supply system of a power exchange cabinet according to claim 1, characterized in that: The AC power detection circuit includes a first transistor, a first resistor and a second resistor. The collector of the first transistor is connected to the buck regulator, the two ends of the first resistor are respectively connected to the AC power and the base of the first transistor, the two ends of the second resistor are respectively connected to the base and emitter of the first transistor, and the emitter of the first transistor is grounded.

3. The reverse power supply system of a power exchange cabinet according to claim 2, characterized in that: The resistance values ​​of the first resistor and the second resistor are consistent.

4. The reverse power supply system of a power exchange cabinet according to claim 1, characterized in that: The reverse output circuit includes a second fuse, a MOS tube and a capacitive reactance circuit. The switching switch, the second fuse, the MOS tube and one end of the capacitive reactance circuit are connected in sequence, and the other end of the capacitive reactance circuit is used to power the power exchange cabinet.

5. The reverse power supply system of a power exchange cabinet according to claim 4, characterized in that: The reverse output circuit includes a second TVS tube, one end of the second TVS tube is grounded, and the other end of the second TVS tube is connected to the switch.

6. The reverse power supply system of a power exchange cabinet according to claim 4, characterized in that: The reverse output circuit includes a second triode, a third resistor and a fourth resistor. The second fuse, the third resistor, the fourth resistor and the base of the second triode are connected in sequence. The emitter of the second triode is connected to the source of the MOS tube, and the collector of the second triode is connected to the gate of the MOS tube.

7. The reverse power supply system of a power exchange cabinet according to claim 6, characterized in that: The reverse output circuit includes a diode, one end of the diode is grounded, and the other end of the diode is connected to the third resistor.

8. The reverse power supply system of a power exchange cabinet according to claim 6, characterized in that: The reverse output circuit includes a fifth resistor, one end of the fifth resistor is grounded, and the other end of the fifth resistor is connected to the collector of the second transistor and the gate of the MOS transistor respectively.

9. The reverse power supply system of a power exchange cabinet according to claim 4, characterized in that: The capacitive reactance circuit includes an electrolytic capacitor and a fixed capacitor. One end of the electrolytic capacitor and one end of the fixed capacitor are both connected to the drain of the MOS tube, and the other end of the electrolytic capacitor and the other end of the fixed capacitor are both grounded.

10. A battery exchange cabinet, characterized in that: A reverse power supply system comprising a battery exchange cabinet as described in any one of claims 1 to 9.

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