Battery swapping station cabinet, alternating-current discharging cabinet, and charging station system

Abstract

A battery swapping station cabinet (11, 1A, 1B, 1C), comprising an alternating-current-to-direct-current converter (11), a plurality of charging and discharging direct-current converters (13-1, 13-2, ..., 13-N), a plurality of batteries (14-1, 14-2, ..., 14-N), a first auxiliary direct-current converter (15), and a mainboard (16), wherein the alternating-current-to-direct-current converter (11) receives a three-phase alternating-current power supply VAC3, and converts the three-phase alternating-current power supply VAC3 into a direct-current bus voltage VBUS; the plurality of charging and discharging direct-current converters (13-1, 13-2, ..., 13-N) respectively receive the direct-current bus voltage VBUS and convert the direct-current bus voltage VBUS into a plurality of direct-current voltages V1, V2, ..., VN; the plurality of batteries (14-1, 14-2, ..., 14-N) are correspondingly connected to the plurality of charging and discharging direct-current converters (13-1, 13-2, ..., 13-N), and receive the plurality of direct-current voltages V1, V2, ..., VN; the first auxiliary direct-current converter (15) receives the direct-current bus voltage VBUS and converts the direct-current bus voltage VBUS into a first state voltage VS1; the mainboard (16) receives the first state voltage VS1 and a second state voltage VS2; and on the basis of the state of the three-phase alternating-current power supply VAC3, the mainboard (16) outputs the first state voltage VS1 or the second state voltage VS2 to the plurality of batteries (14-1, 14-2, ..., 14-N), so as to maintain electric power required by uninterruptible power operations of the plurality of batteries (14-1, 14-2, ..., 14-N).

Description

Battery swap station cabinets, AC discharge cabinets, and charging station systems Technical Field

[0001] The present invention relates to a battery swap station cabinet, an AC discharge cabinet, and a charging station system, and in particular to a battery swap station cabinet, an AC discharge cabinet, and a charging station system with multiple power supply operation modes. Background Art

[0002] Please refer to Figure 1, which is a system block diagram of an existing charging station system. The charging station system includes a plurality of battery swap stations 901-90N and an AC power output device 950. The plurality of battery swap stations 901-90N are connected in parallel with each other, and each battery swap station 901-90N has a plurality of rechargeable batteries (not shown), and any one of them can be pulled out for operation. The rechargeable batteries can not only be used to charge electric vehicles (EVs), but can also be used to power general loads through their discharge. One operational situation is: when the three-phase AC input (such as the grid) fails and cannot supply power to the charging station system, the system will continue to operate using the built-in battery of the battery swap station 901-90N in an uninterruptible power supply (UPS) mode to ensure sustainable operation of the system. In this case, the AC power output device 950 can be used as an emergency power supply for other equipment. Another operational scenario is when the three-phase AC input (e.g., the grid) is operating normally, and the power station owner wishes to use the charging station system's AC power output device 950 to output AC power to other devices, thereby sharing the grid's power supply. Therefore, in both the first and second scenarios, the rechargeable battery plays the role of discharging power, and the charging station system will determine which of the battery swap stations 901-90N will maintain system operation and operate in discharge mode.

[0003] Please refer to Figure 2, which is a functional block diagram of an existing charging station system. Under the current system configuration shown in Figure 2, users can replace the portable battery used by electric vehicles (such as electric motorcycles) at a battery swap station in a specific charging station system, charge the portable battery in a low-power state at the battery swap station, and remove the portable battery with a high power level from the battery swap station for replacement. However, the battery swap cabinet of the current charging station system has the following defects: (1) An uninterruptible power system (UPS) with idle batteries must be set up so that the charging station system can still maintain the battery swap service of the battery swap cabinet when the city power is interrupted; (2) The portable battery can only be charged in one direction; (3) When the portable battery is fully charged, the system enters an idle state.

[0004] As shown in Figure 2, after the external power source (e.g., grid power PS) is converted by the power supply unit 110, a bus voltage of, for example, but not limited to, 400 volts (or 388 volts) is established on the DC bus Pbus. This bus voltage is then stepped down by each voltage converter 121-124 to a battery voltage of, for example, but not limited to, 48 volts, for charging the corresponding batteries B1-B4. Under normal operation, one of the batteries B1-B4 (e.g., battery B1) functions as a UPS. This means that if the mains power is cut off or fails, battery B1 can discharge and provide energy as the bus voltage to maintain normal system operation. In this case, the voltage provided by battery B1 is converted by the corresponding voltage converter 121 to, for example, but not limited to, 355 volts on the DC bus Pbus. In other words, when the system detects a bus voltage of 355 volts, it determines that the mains power is cut off or failed, and that one of the batteries B1-B4 is operating in a UPS state. On the contrary, if the system detects that the bus voltage is 400 volts (or 388 volts), it can be known that the current state is a state of normal mains power supply.

[0005] However, this detection mechanism requires testing based on the voltage difference of a high-voltage bus voltage, i.e., 355V or 400V (or 388V). In addition to considering the high-voltage withstand capability of components, devices, and circuit designs, the high voltage and resulting high current pose a risk to personnel and require careful consideration.

[0006] Therefore, how to design a battery swap station cabinet, AC discharge cabinet and charging station system to solve the problems and technical bottlenecks existing in the existing technology is an important topic studied by the inventors of the present disclosure.

[0007] Summary of the Invention

[0008] One object of the present invention is to provide a battery swap station cabinet. The battery swap station cabinet includes an AC-to-DC converter, a plurality of charge-discharge DC converters, a plurality of batteries, a first auxiliary DC converter, and a mainboard. The AC-to-DC converter receives a three-phase AC power supply and converts the three-phase AC power supply into a DC bus voltage, wherein the DC bus voltage is established on the DC bus. The plurality of charge-discharge DC converters respectively receive the DC bus voltage and convert the DC bus voltage into a plurality of DC voltages. The plurality of batteries are correspondingly connected to the charge-discharge DC converters and receive the DC voltages. The first auxiliary DC converter receives the DC bus voltage and converts the DC bus voltage into a first state voltage. The mainboard receives a first state voltage and a second state voltage, wherein the first state voltage is greater than the second state voltage. According to the state of the three-phase AC power supply, the mainboard outputs the first state voltage or the second state voltage to the batteries to maintain the power required for the batteries to operate without power outages.

[0009] In one embodiment, the mainboard includes a switching contact. The switching contact is configured to receive a first-state voltage and a second-state voltage. When the three-phase AC power source is disabled, the second-state voltage is output from the mainboard to the batteries via the switching contact to maintain the power required for uninterrupted operation of the batteries. When the three-phase AC power source is enabled, the first-state voltage is output from the mainboard to the batteries via the switching contact to maintain the power required for uninterrupted operation of the batteries.

[0010] In one embodiment, the battery swap station cabinet further includes a second auxiliary DC converter coupled to the mainboard, receiving any one of the DC voltages and converting the DC voltage into a second state voltage.

[0011] In one embodiment, the battery swap station cabinet further includes a plurality of diodes. Each diode has an anode and a cathode. The anodes of the diodes are connected to the plurality of charge and discharge paths between the charge and discharge DC converters and the batteries, respectively; the cathodes of the diodes are connected in common and connected to the second auxiliary DC converter.

[0012] In one embodiment, the battery swap station cabinet further includes a DC converter and an air conditioning unit. The DC converter receives a DC bus voltage and converts the DC bus voltage into a supply voltage. The air conditioning unit receives and is powered by the supply voltage to provide heat dissipation for the batteries.

[0013] In one embodiment, any one of the batteries is replaceable.

[0014] In one embodiment, any one of the charge-discharge DC converters is a bidirectional converter.

[0015] In one embodiment, the battery swap station cabinet provides auxiliary power, and the voltage of the auxiliary power is between an upper limit voltage and a lower limit voltage. In a first state, the voltage is not higher than the upper limit voltage, and in a second state, the voltage is not lower than the lower limit voltage.

[0016] In one embodiment, the battery swap station cabinet further includes a plurality of diodes. Each diode has an anode and a cathode. The anodes of the diodes are connected to the plurality of charge and discharge paths between the charge and discharge DC converters and the batteries, respectively; the cathodes of the diodes are connected in common and connected to the first auxiliary DC converter.

[0017] In one embodiment, the first auxiliary DC converter further receives any one of the DC voltages and converts the DC voltage into a second-state voltage.

[0018] In one embodiment, when the three-phase AC power supply is disabled, the first auxiliary DC converter outputs a second-state voltage, so that the second-state voltage is output from the mainboard to the batteries; when the three-phase AC power supply is enabled, the first auxiliary DC converter outputs a first-state voltage, so that the first-state voltage is output from the mainboard to the batteries.

[0019] In one embodiment, the battery swap station cabinet further includes an uninterruptible power supply (UPS) unit. The UPS unit generates a second-state voltage. When the three-phase AC power supply is disabled, the UPS unit outputs the second-state voltage, causing the second-state voltage to be output from the mainboard to the batteries. When the three-phase AC power supply is enabled, the first auxiliary DC converter outputs the first-state voltage, causing the first-state voltage to be output from the mainboard to the batteries.

[0020] In one embodiment, the uninterruptible power unit further receives a first-state voltage and is powered by the first-state voltage.

[0021] Another object of the present invention is to provide an AC discharge cabinet. The AC discharge cabinet includes a second DC bus, a third auxiliary DC converter, a second mainboard, and a DC-to-AC converter. The second DC bus provides a DC bus voltage. The third auxiliary DC converter receives the DC bus voltage and converts it into an operating voltage. The second mainboard receives the operating voltage. The DC-to-AC converter receives the DC bus voltage and converts it into an AC conversion voltage.

[0022] In one embodiment, the AC discharge cabinet further includes an input switch that receives a control signal provided by the second mainboard and controls the on and off state of the input switch through the control signal.

[0023] In one embodiment, the input switch receives a single-phase AC power supply. When the AC converted voltage can be used as the output voltage of the AC discharge cabinet, the second mainboard controls the input switch to be turned off via a control signal. When the AC converted voltage cannot be used as the output voltage of the AC discharge cabinet, the second mainboard controls the input switch to be turned on via a control signal, allowing the single-phase AC power supply to be used as the output voltage of the AC discharge cabinet.

[0024] Yet another object of the present invention is to provide a charging station system. The charging station system includes a battery swap station cabinet and an AC discharge cabinet. The battery swap station cabinet also includes a connection switch connected between the DC bus and a second DC bus. The mainboard provides a connection control signal to control the on and off of the connection switch.

[0025] In one embodiment, when the connecting switch is turned on so that the DC bus voltage on the DC bus is provided to the second DC bus via the connecting switch, the AC conversion voltage serves as the output voltage of the AC discharge cabinet.

[0026] In one embodiment, when the connecting switch is turned off so that the DC bus voltage on the DC bus cannot be provided to the second DC bus via the connecting switch, the single-phase AC power source serves as the output voltage of the AC discharge cabinet.

[0027] Thereby, the battery swap station cabinet, AC discharge cabinet and charging station system provided by the present invention can provide operation in multiple power supply modes.

[0028] In order to further understand the technologies, means and technical effects adopted by the present invention to achieve the intended objectives, please refer to the following detailed description of the present invention and the accompanying drawings. It is believed that the objectives, features and characteristics of the present invention can be understood in depth and in detail. However, the accompanying drawings are provided for reference and illustration only and are not intended to limit the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1: System block diagram of an existing charging station system.

[0030] Figure 2: Functional block diagram of an existing charging station system.

[0031] FIG3 is a block diagram of a first embodiment of a battery swap station cabinet according to the present invention.

[0032] FIG4 is a block diagram of a second embodiment of a battery swap station cabinet according to the present invention.

[0033] FIG5 is a block diagram of a third embodiment of a battery swap station cabinet according to the present invention.

[0034] FIG6 is a block diagram of the motherboard of the present invention having switching contacts.

[0035] FIG7 is a block diagram of the AC discharge cabinet of the present invention.

[0036] FIG8 is a block diagram of the charging station system of the present invention.

[0037] FIG9 is a flow chart of the power supply management method of the present invention.

[0038] FIG10 is a schematic diagram illustrating the operation of the charging station system of the present invention in the first power supply mode.

[0039] FIG. 11 is a schematic diagram illustrating the operation of the second power supply mode of the charging station system of the present invention.

[0040] FIG12 is a schematic diagram showing the operation of the third power supply mode of the charging station system of the present invention.

[0041] FIG. 13 is a schematic diagram illustrating the operation of the fourth power supply mode of the charging station system of the present invention.

[0042] FIG. 14 is a schematic diagram illustrating the operation of the fifth power supply mode of the charging station system of the present invention.

[0043] FIG. 15 is a schematic diagram illustrating the operation of the sixth power supply mode of the charging station system of the present invention.

[0044] FIG16 is a block diagram of a first embodiment of a human-machine interface of a charging station system according to the present invention.

[0045] FIG17 is a block diagram of a first embodiment of a human-machine interface of a charging station system according to the present invention.

[0046] Explanation of the reference numerals: 1A, 1B, 1C, 1-1 to 1-N: battery swap station cabinet 11: AC to DC converter 12: DC bus 13-1: first charge-discharge DC converter 13-2: second charge-discharge DC converter 13-N: Nth charge-discharge DC converter 14-1: first battery 14-2: second battery 14-N: Nth battery 15: first auxiliary DC converter 16: main board 161: switching contact 17: second auxiliary DC converter 18: DC converter 19-1: first diode 19-2: second diode 19-N: Nth diode HVAC: air conditioning unit UPS: uninterruptible power unit 2: AC discharge cabinet 21: second DC bus 22: third auxiliary DC converter 23: second main board 24: DC to AC converter 25: input switch 10, 10-1 to 10-N: connecting switch P1: first charge and discharge path P2: second charge and discharge path P N : Nth charge and discharge path V AC3 : Three-phase AC power supply V BUS : DC bus voltage V1: first DC voltage V2: second DC voltage V N : Nth DC voltage V S1 : First state voltage V S2 : Second state voltage V HV : Supply voltage V WK : Operating voltage V ACC : AC conversion voltage V AC1 : Single-phase AC power supply V OUT : Output voltage S C1 :Connect control signal S C2 : Control signal HMI: Human-machine interface S11~S24: Step Pbus: DC bus 121-124: Voltage converter B1-B4: Battery DETAILED DESCRIPTION

[0047] The technical content and detailed description of the present invention are described as follows with reference to the accompanying drawings.

[0048] Please refer to Figure 3, which is a block diagram of the first embodiment of the battery swap station cabinet of the present invention. The battery swap station cabinet 1A includes an AC-DC converter 11, a plurality of charge-discharge DC converters 13-1, 13-2, ..., 13-N, a plurality of batteries 14-1, 14-2, ..., 14-N, a first auxiliary DC converter 15, and a mainboard 16. The AC-DC converter 11 receives a three-phase AC power supply V AC3 , and convert the three-phase AC power supply V AC3 is the DC bus voltage V BUS . The DC bus voltage V BUS Established on the DC bus 12.

[0049] The plurality of charge-discharge DC converters 13-1, 13-2, ..., 13-N receive the DC bus voltage V BUS , and convert the DC bus voltage V BUS is a plurality of DC voltages V1, V2, ..., VN. Specifically, the charge-discharge DC converters 13-1, 13-2, ..., 13-N include a first charge-discharge DC converter 13-1, a second charge-discharge DC converter 13-2, ..., and so on, the Nth charge-discharge DC converter 13-N. Incidentally, any of the charge-discharge DC converters 13-1, 13-2, ..., 13-N is a bidirectional converter. Therefore, for the power flow from the DC bus 12 to the plurality of batteries 14-1, 14-2, ..., 14-N, the first charge-discharge DC converter 13-1 receives the DC bus voltage V BUS , and convert the DC bus voltage V BUS The second charge-discharge DC converter 13-2 receives the DC bus voltage V BUS , and convert the DC bus voltage V BUS is the second DC voltage V2; ..., and so on, the Nth charge-discharge DC converter 13-N receives the DC bus voltage V BUS , and convert the DC bus voltage V BUS is the Nth DC voltage V N .

[0050] The plurality of batteries 14-1, 14-2, ..., 14-N are connected to the charge-discharge DC converters 13-1, 13-2, ..., 13-N respectively and receive the DC voltages V1, V2, ..., V NSpecifically, the plurality of batteries 14-1, 14-2, ..., 14-N include a first battery 14-1, a second battery 14-2, ..., and so on, the Nth battery 14-N. Incidentally, in the present invention, any of the batteries 14-1, 14-2, ..., 14-N can be swapped out. The first battery 14-1 is connected to the first charge-discharge DC converter 13-1; the second battery 14-2 is connected to the second charge-discharge DC converter 13-2; ..., and so on, the Nth battery 14-N is connected to the Nth charge-discharge DC converter 13-N. Incidentally, the aforementioned "battery" is used for the purpose of simplicity, but those skilled in the art will understand that the so-called "battery" is an abbreviation for a battery module, which includes a battery cell and its related electrical and mechanical components and devices. For example, electrical components or devices such as charging and discharging circuits, battery management units, sensors, balancing circuits, circuit breakers, etc., as well as mechanical components or devices such as module housings, heat sinks, brackets or fixings, and plug-in and unplug handles.

[0051] As previously mentioned, each of the charge-discharge DC converters 13-1, 13-2, ..., 13-N is a bidirectional converter. Therefore, with respect to the power flow from the plurality of batteries 14-1, 14-2, ..., 14-N to the DC bus 12, the power output from the first battery 14-1 can be converted by the first charge-discharge DC converter 13-1 to be fed back to the DC bus 12; the power output from the second battery 14-2 can be converted by the second charge-discharge DC converter 13-2 to be fed back to the DC bus 12; and so on. The power output from the Nth battery 14-N can be converted by the Nth charge-discharge DC converter 13-N to be fed back to the DC bus 12.

[0052] The first auxiliary DC converter 15 receives the DC bus voltage V BUS , and convert the DC bus voltage V BUS is the first state voltage V S1 In one embodiment, the first state voltage V S1 The motherboard 16 receives the first state voltage V S1 and the second state voltage V S2 , where the first state voltage V S1 The magnitude is greater than the second state voltage V S2 As mentioned above, the first state voltage V S1 is 12.4 volts, then the second state voltage V S2 11.75 volts, but this is not intended to limit the present invention. S1 and the second state voltage V S2 The voltage value is only for the convenience of explanation. Incidentally, the first state voltage V S1 and the second state voltage VS2 The voltage can be a voltage range rather than a single voltage value, but still meets the first state voltage V S1 The magnitude is greater than the second state voltage V S2 More specifically, the auxiliary power provided by the power swap station cabinet is used to provide the auxiliary power required for the basic operation of the system in the power swap station cabinet. The basic operation of the system includes the auxiliary power required for the operation of peripheral devices such as the system control circuit, display or operation interface. And when the voltage of the power output by the auxiliary power is between the upper limit voltage and the lower limit voltage, it can provide the power required for the basic operation of the system, so the first state voltage V S1 Not higher than the upper limit voltage, the second state voltage V S2 For example, assuming that the upper and lower limit voltages of the auxiliary power are 13 volts and 11 volts respectively, the first state voltage V S1 and the second state voltage V S2 The voltages can be 12.4V and 11.75V respectively, or the first state voltage V S1 and the second state voltage V S2 It can be 12.8~12.3 volts and 11.9~11.4 volts respectively.

[0053] According to the three-phase AC power supply V AC3 State, the mainboard 16 outputs the first state voltage V S1 Or the second state voltage V S2 To the batteries 14-1, 14-2, ..., 14-N, to maintain the power required for the batteries 14-1, 14-2, ..., 14-N to operate without interruption. Incidentally, the so-called "uninterrupted operation" refers to the power required to maintain the normal operation of the batteries 14-1, 14-2, ..., 14-N, and does not include the power required to charge them.

[0054] Specifically, when the three-phase AC power supply V AC3 When disabled (e.g., power failure, power interruption, or the like), the motherboard 16 outputs the second state voltage V S2 To the batteries 14-1, 14-2, ..., 14-N, so as to maintain the power required for the batteries 14-1, 14-2, ..., 14-N to operate without interruption. AC3 When enabled, the motherboard 16 outputs a first state voltage V S1 to the batteries 14 - 1 , 14 - 2 , … , 14 -N to maintain the power required for the batteries 14 - 1 , 14 - 2 , … , 14 -N to operate without power outages.

[0055] As shown in FIG3 , the battery swap station cabinet 1A further includes a second auxiliary DC converter 17. The second auxiliary DC converter 17 receives the DC voltages V1, V2, ..., V N Any one of them, and convert the DC voltage V1, V2, ..., V N is the second state voltage V S2 Specifically, the second auxiliary DC converter 17 receives the first DC voltage V1 and converts the first DC voltage V1 into the second state voltage V S2 The second auxiliary DC converter 17 receives the second DC voltage V2 and converts the second DC voltage V2 into a second state voltage V S2 ..., and so on, the second auxiliary DC converter 17 receives the Nth DC voltage V N , and convert the Nth DC voltage V N is the second state voltage V S2 .

[0056] As shown in FIG3 , the battery swap station cabinet 1A further includes a plurality of diodes 19-1, 19-2, ..., 19-N, each diode 19-1, 19-2, ..., 19-N having an anode and a cathode. The anodes of the diodes 19-1, 19-2, ..., 19-N are respectively connected to the plurality of charge and discharge paths P1, P2, ..., P2 between the charge and discharge DC converters 13-1, 13-2, ..., 13-N and the batteries 14-1, 14-2, ..., 14-N. N . The cathodes of the diodes 19-1, 19-2, ..., 19-N are connected together and connected to the second auxiliary DC converter 17. Specifically, the plurality of diodes 19-1, 19-2, ..., 19-N include a first diode 19-1, a second diode 19-2, ..., and so on, an N-th diode 19-N. The anode of the first diode 19-1 is connected to the first charge-discharge path P1 between the first charge-discharge DC converter 13-1 and the first battery 14-1; the anode of the second diode 19-2 is connected to the second charge-discharge path P2 between the second charge-discharge DC converter 13-2 and the second battery 14-2; ..., and so on, the anode of the N-th diode 19-N is connected to the N-th charge-discharge path P1 between the N-th charge-discharge DC converter 13-N and the N-th battery 14-N. N The cathode of the first diode 19 - 1 , the cathode of the second diode 19 - 2 , . . . , and the cathode of the N-th diode 19 -N are connected in common and connected to the second auxiliary DC converter 17 .

[0057] As shown in FIG3 , the battery swap station cabinet 1A further includes a DC converter 18 and an air conditioning unit HVAC. The DC converter 18 receives a DC bus voltage V BUS , and convert the DC bus voltage V BUS is the supply voltage VHV The air conditioning unit HVAC receives the supply voltage V HV , and the supply voltage V HV The power supplied is used to provide heat dissipation for the batteries 14 - 1 , 14 - 2 , . . . , 14 -N.

[0058] Please refer to FIG6, which is a block diagram of the motherboard of the present invention with a switching contact. The motherboard 16 includes a switching contact 161, but is not limited to this. This switching contact can also be a busbar. Its main purpose is to achieve the first state voltage V S1 and the second state voltage V S2 When switching between the two, power (voltage) switching and connection can be achieved without time difference, so as to ensure the stability of system operation. The switching contact 161 can receive the first state voltage V S1 and the second state voltage V S2 When the three-phase AC power supply V AC3 When disabled, the second state voltage V S2 The power is outputted from the main board 16 to the batteries 14-1, 14-2, ..., 14-N via the switching contact 161. AC3 When enabled, due to the first state voltage V S1 The magnitude is greater than the second state voltage V S2 The size of the first state voltage V S1 The power is output from the mainboard 16 to the batteries 14 - 1 , 14 - 2 , . . . , 14 -N via the switching contact 161 .

[0059] Please refer to FIG4 , which is a block diagram of the second embodiment of the battery swap station cabinet of the present invention. According to the description of the first embodiment of the battery swap station cabinet of the present invention shown in FIG3 , the same or similar parts will not be repeated. Compared with the first embodiment shown in FIG3 , the second embodiment shown in FIG4 does not use the second auxiliary DC converter 17. Therefore, the anodes of the diodes 19-1, 19-2, …, 19-N are respectively connected to the multiple charge and discharge paths P1, P2, …, P between the charge and discharge DC converters 13-1, 13-2, …, 13-N and the batteries 14-1, 14-2, …, 14-N. N The cathodes of the diodes 19-1, 19-2, ..., 19-N are connected together and connected to the first auxiliary DC converter 15. Furthermore, the first auxiliary DC converter 15 further receives the same DC voltages V1, V2, ..., V N ) and converts the DC voltage V1, V2, ..., V N is the second state voltage V S2 .

[0060] When the three-phase AC power supply V AC3When disabled, the first auxiliary DC converter 15 outputs the second state voltage V S2 , so that the second state voltage V S2 Output from the main board 16 to the batteries 14-1, 14-2, ..., 14-N. In addition, when the three-phase AC power supply V AC3 When enabled, the first auxiliary DC converter 15 outputs a first state voltage V S1 , so that the first state voltage V S1 The main board 16 outputs the power to the batteries 14 - 1 , 14 - 2 , . . . , 14 -N.

[0061] Please refer to Figure 5, which is a block diagram of the third embodiment of the battery swap station cabinet of the present invention. According to the description of the first and second embodiments of the battery swap station cabinet of the present invention shown in Figures 3 and 4, the same or similar parts will not be repeated. Compared with the first embodiment shown in Figure 3 and the second embodiment shown in Figure 4, the third embodiment shown in Figure 5 does not use the diodes 19-1, 19-2, ..., 19-N. In addition, the third embodiment shown in Figure 5 also includes an uninterruptible power supply unit UPS compared to the first embodiment shown in Figure 3 and the second embodiment shown in Figure 4.

[0062] The uninterruptible power unit UPS generates a second state voltage V S2 When the three-phase AC power supply VAC3 is disabled, the uninterruptible power supply unit UPS outputs the second state voltage V S2 , so that the second state voltage V S2 Output from the main board 16 to the batteries 14-1, 14-2, ..., 14-N. In addition, when the three-phase AC power supply V AC3 When enabled, the first auxiliary DC converter 15 outputs a first state voltage V S1 , so that the first state voltage V S1 Output from the motherboard 16 to the batteries 14-1, 14-2, ..., 14-N. In addition, the uninterruptible power unit UPS further receives the first state voltage V S1 , and the power required by the uninterruptible power supply unit UPS is supplied by the first state voltage VS1.

[0063] Please refer to Figure 7, which is a block diagram of the AC discharge cabinet of the present invention. The AC discharge cabinet includes a second DC bus 21, a third auxiliary DC converter 22, a second mainboard 23, and a DC to AC converter 24. The second DC bus 21 provides a DC bus voltage V BUS The third auxiliary DC converter 22 receives the DC bus voltage V BUS , and convert the DC bus voltage V BUS is the operating voltage V WK The second mainboard 23 receives the working voltage V WKThe DC to AC converter 24 receives the DC bus voltage V BUS , and convert the DC bus voltage V BUS is the AC conversion voltage V ACC .

[0064] The AC discharge cabinet further includes an input switch 25. The input switch 25 receives the control signal S provided by the second mainboard 23. C2 , and through the control signal S C2 Controls the on and off of the input switch 25. The input switch 25 receives a single-phase AC power supply V AC1 When the AC conversion voltage V ACC Can be used as the output voltage V of AC discharge cabinet 2 OUT When the AC conversion voltage V ACC Cannot be used as the output voltage V of AC discharge cabinet 2 OUT When the second main board 23 passes the control signal S C2 Control input switch 25 to turn on, so that the single-phase AC power supply V AC1 As the output voltage V of AC discharge cabinet 2 OUT .

[0065] Please refer to Figure 8, which is a block diagram of the charging station system of the present invention. The charging station system includes the aforementioned battery swap station cabinets 1A, 1B, 1C and the AC discharge cabinet 2, wherein the battery swap station cabinets 1A, 1B, 1C are connected to the AC discharge cabinet 2. Incidentally, since the battery swap station cabinets 1A, 1B, 1C have different embodiments, the charging station system of the present invention has different embodiments in conjunction with the use of the AC discharge cabinet 2. Therefore, the present invention is not limited to the combined use of the battery swap station cabinet 1C and the AC discharge cabinet 2 shown in Figure 8. In other words, the charging station system of the present invention may also include the combined use of the battery swap station cabinet 1A and the AC discharge cabinet 2, as well as the combined use of the battery swap station cabinet 1B and the AC discharge cabinet 2.

[0066] As shown in Figure 8, the battery swap station cabinet 1C also includes a connecting switch 10. Specifically, the connecting switch 10 is connected between the DC bus 12 and the second DC bus 21 to connect the battery swap station cabinet 1C to the AC discharge cabinet 2. That is, when the connecting switch 10 is turned on, the DC bus voltage VBUS supplied to the battery swap station cabinet 1C is provided to the AC discharge cabinet 2 through the DC bus 12 and the second DC bus 21. The on or off of the connecting switch 10 is controlled by the mainboard 16. Specifically, the mainboard 16 provides a connection control signal SC1 to control the on and off of the connecting switch 10.

[0067] Specifically, when the connecting switch 10 is turned on, the DC bus voltage V BUSWhen the AC conversion voltage V is provided to the second DC bus 21 via the connecting switch 10, the AC conversion voltage V ACC As the output voltage V of AC discharge cabinet 2 OUT In addition, when the connecting switch 10 is turned off, the DC bus voltage V BUS When the single-phase AC power source V AC1 As the output voltage V of AC discharge cabinet 2 OUT .

[0068] Please refer to Figure 9, which is a flow chart of the power supply management method of the present invention. The power supply management method can be applied to different embodiments of the battery swap station cabinets in the charging station system of the present invention, such as any of the first embodiment shown in Figure 3, the second embodiment shown in Figure 4, and the third embodiment shown in Figure 5, which are described in detail first. When the system is normal, the system determines whether the mains power is normally supplied (step S11). If it is determined that the mains power is normally supplied, the system determines whether the battery is in normal charging mode (step S12). If it is determined that the battery is in normal charging mode, the system charges the battery (step S13). Incidentally, in step S12, the confirmation conditions are: (a) whether the bidirectional charge and discharge DC converters 13-1, 13-2, ..., 13-N have any abnormalities; (b) whether the batteries 14-1, 14-2, ..., 14-N have any abnormalities; (c) whether the system has entered normal charging mode. If none of the above confirmation conditions (a) and (b) are abnormal, and the confirmation condition (c) is "yes", the result of step S12 is "yes"; if one of the above confirmation conditions (a) and (b) is abnormal, the system evaluates that some batteries 14-1, 14-2, ..., 14-N can be charged, and the confirmation condition (c) is "yes", the result of step S12 is "yes"; if none of the above confirmation conditions (a) and (b) are abnormal, and the confirmation condition (c) is "no", the result of step S12 is "no"; if one of the above confirmation conditions (a) and (b) is abnormal, the system evaluates that some batteries 14-1, 14-2, ..., 14-N can be charged, and the confirmation condition (c) is "no", the result of step S12 is "no".

[0069] Regarding the battery charging in step S13, please refer to FIG10 , which is a schematic diagram of the operation of the first power supply mode of the charging station system of the present invention. In the first power supply mode, when the mains voltage V AC3 When the AC-DC converter 11 is in normal operation (e.g. a three-phase AC power source), it converts the mains voltage V AC3 Converted into a DC voltage (for example, 388 volts, but not limiting the present invention), namely, the DC bus voltage V BUS , and is established on the DC bus 12. Further, the DC bus voltage V BUSThe DC bus voltage V is provided to the first charge-discharge DC converter 13-1, the second charge-discharge DC converter 13-2, ..., the Nth charge-discharge DC converter 13-N, and the DC bus voltage V is converted to V by the first charge-discharge DC converter 13-1, the second charge-discharge DC converter 13-2, ..., the Nth charge-discharge DC converter 13-N. BUS The first DC voltage V1, the second DC voltage V2, ..., the Nth DC voltage VN are converted respectively to charge the first battery 14-1, the second battery 14-2, ..., the Nth battery 14-N respectively.

[0070] Furthermore, the first auxiliary DC converter 15 receives the DC bus voltage V BUS , and convert the DC bus voltage V BUS is the first state voltage V S1 In one embodiment, the first state voltage V S1 12.4 volts, but this is not intended to limit the present invention. S1 To provide the uninterruptible power supply unit UPS and the motherboard 16, to maintain the power required for the system operation, so as to maintain the normal operation of the system. Therefore, the uninterruptible power supply unit UPS can provide a second state voltage V S2 To the main board 16, for controlling and monitoring the plurality of batteries 14-1, 14-2, ..., 14-N. In one embodiment, the second state voltage V S2 The voltage is 11.75 volts, but this is not intended to limit the present invention.

[0071] At this time, in the normal charging mode, the connection control signal S provided by the motherboard 16 C1 The control connection switch 10 is turned off, so the circuit between the power station cabinet 1 and the AC discharge cabinet 2 is disconnected, making the DC bus voltage V BUS The control signal S provided by the second mainboard 23 cannot be provided to the second DC bus 21 of the AC discharge cabinet 2 through the connecting switch. C2 Control input switch 25 to turn on, so that the single-phase AC power supply V AC1 As the output voltage V of AC discharge cabinet 2 OUT .

[0072] After step S13, the process returns to step S11, where it re-executes the determination of whether the AC power is being supplied normally, and the subsequent related steps. Incidentally, in step S11, the confirmation conditions include: (a) whether the AC power is input to the AC-DC converter 11, and whether any abnormalities have occurred in the bidirectional charge-discharge DC converters 13-1, 13-2, ..., 13-N; and (b) whether any abnormalities have occurred in the first auxiliary DC converter 15. If neither of the above confirmation conditions (a) or (b) is abnormal, the result of step S11 is "yes." If either of the above confirmation conditions (a) or (b) is abnormal, the result of step S11 is "no."

[0073] In step S11, if the system determines that the mains power supply is abnormal, it performs emergency AC power supply (step S14). For example, it is not limited to power supply by a configured uninterruptible power supply. In addition, in step S12, if the system determines that the battery is not in normal charging mode, it performs peak shaving (step S15) to reduce the mains power V AC3 The system then implements emergency AC power supply (step S14) to mitigate power supply pressure during peak hours. Incidentally, "peak shaving and valley filling" refers to a method used to regulate power loads: During peak power demand periods, high power consumption can lead to power shortages or grid overload. Peak shaving involves reducing power demand during peak periods by restricting the use of certain non-essential devices or encouraging users to reduce their electricity consumption through pricing mechanisms, thereby alleviating grid pressure. Furthermore, during low power demand periods, power consumption is low, potentially wasting electricity resources. Valley filling involves using incentives (such as lowering electricity prices) to encourage users to use electricity during low-demand periods, thereby increasing power demand during these periods and improving power resource utilization efficiency. This optimizes power resource allocation and ensures stable power system operation. Therefore, if the judgment in step S11 or step S12 is "No," emergency AC power supply (step S14) will be implemented. The system then enters battery-powered idle mode (step S16).

[0074] In the battery power off idle mode, the uninterruptible power supply unit UPS temporarily provides the power required by the system to maintain continuous operation of the system. Regarding the battery power off idle mode in step S16, please refer to Figure 11, which is an operating diagram of the second power supply mode of the charging station system of the present invention. AC3 When the power supply fails or the AC-DC converter 11 is abnormal, the DC bus 12 will not be able to establish the DC bus voltage V BUS , so the DC bus voltage V BUS Converted to the voltage V1…V N Therefore, the batteries 14 - 1 . . . 14 -N cannot be charged, and are in a battery power-off idle mode.

[0075] Since the batteries 14-1...14-N are in the power-off idle mode, the batteries 14-1...14-N wait for confirmation to output (discharge) to the bidirectional charge-discharge DC converters 13-1, 13-2,..., 13-N, and then provide the converted power to the DC bus 12. At this time, the uninterruptible power unit UPS outputs the second state voltage V S2 To the mainboard 16, to maintain the normal operation of the system, and the second state voltage V S2 Output from the mainboard 16 to the batteries 14-1, 14-2, ..., 14-N. In addition, in the battery power off idle mode, the connection control signal SC1 provided by the mainboard 16 controls the connection switch 10 to be turned off, so that the circuit between the battery swap station cabinet 1 and the AC discharge cabinet 2 is disconnected. Furthermore, the single-phase AC power supply VAC1 cannot be used as the output voltage V of the AC discharge cabinet 2. OUT .

[0076] After step S16, in the battery-off idle mode, with the UPS temporarily providing the required power for the system, a power supply battery is selected (step S17) to provide the power required for system operation. As previously mentioned, in the battery-off idle mode, the batteries 14-1...14-N wait to determine which one will be selected to provide the power required for system operation. Regarding the selection of the power supply battery in step S17, please refer to FIG. 12 , which illustrates the operation of the charging station system in the third power supply mode of the present invention.

[0077] In the selected power supply battery operation, the system selects one of the batteries 14-1...14-N as the source of power. Therefore, the power output by the selected battery 14-1...14-N is converted by the corresponding charge-discharge DC converter 13-1...13-N, and the converted power is then provided to the DC bus 12. For example, if the first battery 14-1 is selected as the power supply, the first discharge DC converter 13-1 converts the power output (discharge) of the first battery 14-1 and provides the converted power to the DC bus 12 as the DC bus voltage V BUS Therefore, the first auxiliary DC converter 15 receives the DC bus voltage V BUS , and convert the DC bus voltage V BUS is the first state voltage V S1 , to provide the power required for the operation of the mainboard 16 and the uninterruptible power supply unit UPS to maintain the normal operation of the system.

[0078] After step S17, it is determined whether the operation is in the discharge and battery lending mode in which the AC discharge cabinet can be discharged and the batteries are in the loanable state (step S18). That is, it is determined whether the AC discharge cabinet can be operated in the discharge mode, and then the DC power provided by the batteries 14-1...14-N is converted into AC power output for discharge, and it is determined whether the standby batteries 14-1...14-N can be loaned out for use. Incidentally, the operation of battery lending is to add battery lending logic when the system is discharged. When selecting the judgment formula for battery lending, the system operation prioritizes the following state weights: (1) the number of days that the batteries 14-1...14-N can be used to supply power to the system; (2) at least n batteries 14-1...14-N can be used as battery lending mode; (3) at least n batteries 14-1...14-N can be used as discharge mode.

[0079] If the judgment of step S18 is "yes", the system selects the battery swap station cabinets 1 (step S19). Under the operation of the battery swap station cabinet selection mode, the charging station system will determine one of the battery swap station cabinets as the discharge mode. Specifically, the system confirms that it has entered the battery swap station cabinet selection mode, and the system specifies the battery swap station cabinet for discharge and, for example but not limited to, 4 batteries 14-1...14-N, and then completes the selection of the battery swap station cabinet for discharge, preparing to enter the discharge mode. Incidentally, in step S18, the confirmation conditions are: (a) at least one battery swap station cabinet is maintained, and more than two batteries 14-1...14-N can supply power to the system mode; (b) at least one battery swap station cabinet is maintained, and more than four batteries 14-1...14-N can be used as the discharge mode; (c) at least one battery swap station cabinet is maintained, and more than four batteries 14-1...14-N can be used as the battery lending mode. If the above confirmation conditions (a), (b), and (c) are all met, the result of the judgment in step S18 is "the AC discharge cabinet can be discharged and the batteries are in a loanable state"; if the above confirmation conditions (a) are "yes", (b) are "no", and (c) are "yes", the result of the judgment in step S18 is "the batteries are in a loanable state"; if the above confirmation condition (a) is "no", the result of the judgment in step S18 is "entering the battery-powered system mode"; if the above confirmation condition (c) is "no", the result of the judgment in step S18 is "entering the battery-powered system mode".

[0080] After step S19, the selected battery swap station cabinet supplies power to the AC discharge cabinet (step S20). Regarding powering the AC discharge cabinet in step S19, please refer to FIG. 13 , which is a schematic diagram of the fourth power supply mode of the charging station system of the present invention, or FIG. 14 , which is a schematic diagram of the fifth power supply mode of the charging station system of the present invention.

[0081] As shown in Figure 13, when the mains voltage V AC3 During normal power supply, the system commands the batteries 14-1…14-N to switch to discharging mode. Therefore, the batteries 14-1…14-N provide a DC bus voltage V through the bidirectional DC charge-discharge converters 13-1, 13-2,…,13-N. BUS On the DC bus 12. And the first auxiliary DC converter 15 converts the DC bus voltage V BUS is the first state voltage V S1 , to provide the power required for the operation of the motherboard 16 and the uninterruptible power supply unit UPS to maintain the normal operation of the system. At this time, the motherboard 16 provides a connection control signal S C1 The connecting switch 10 is controlled to be turned on, so that the DC bus 12 of the power station cabinet 1 is connected to the second DC bus 21 of the AC discharge cabinet 2. Therefore, the DC bus voltage V BUS The signal is transmitted to the second DC bus 21 through the DC bus 12. At this time, the second mainboard 23 of the AC discharge cabinet 2 controls the signal S C2 The input switch 25 is controlled to be off, thereby disconnecting the single-phase AC power supply V AC1 Input to AC discharge cabinet 2. Finally, the system will evaluate the battery 14-1...14-N with higher capacity, discharge it to the DC to AC converter 24 (or inverter) of AC discharge cabinet 2, and convert the DC bus voltage V BUS is the AC conversion voltage V ACC , as the output voltage V of AC discharge cabinet 2 OUT .

[0082] As shown in Figure 14, when the mains voltage V AC3 When the AC to DC converter 11 fails to supply power normally or is abnormal, the batteries 14-1...14-N change to discharging mode. Therefore, the batteries 14-1...14-N provide a DC bus voltage V through the bidirectional DC charge-discharge converters 13-1, 13-2,...,13-N. BUS On the DC bus 12. And the first auxiliary DC converter 15 converts the DC bus voltage V BUS is the first state voltage V S1 , to provide the power required for the operation of the motherboard 16 and the uninterruptible power supply unit UPS to maintain the normal operation of the system. At this time, the motherboard 16 provides a connection control signal S C1 The connecting switch 10 is controlled to be turned on, so that the DC bus 12 of the power station cabinet 1 is connected to the second DC bus 21 of the AC discharge cabinet 2. Therefore, the DC bus voltage V BUSThe voltage is transmitted to the second DC bus 21 via the DC bus 12. At this point, the second mainboard 23 of the AC discharge cabinet 2 controls the input switch 25 to turn off via the control signal SC2, thereby disconnecting the single-phase AC power supply VAC1 from the AC discharge cabinet 2. Ultimately, the system evaluates the higher-capacity batteries 14-1…14-N and discharges them to the DC-to-AC converter 24 (or inverter) of the AC discharge cabinet 2, which converts the DC bus voltage V BUS is the AC conversion voltage V ACC , as the output voltage V of AC discharge cabinet 2 OUT .

[0083] After step S20, the system returns to step S18 to determine whether the AC discharge cabinet is in the discharge and battery lending mode, where the batteries can be lent out. If the result of step S18 is "No", it means that the AC discharge cabinet 2 can no longer provide AC power, so the system checks to determine whether the AC power supply V AC3 Whether the power supply is normal (step S21).

[0084] If the mains voltage V AC3 Normal power supply, the system determines whether the battery is in normal charging mode (step S22). If it is determined that the battery is in normal charging mode, the system enters the battery recovery idle mode (step S23). In the battery recovery idle mode, the uninterruptible power unit UPS temporarily provides the power required by the system to maintain continuous operation of the system. Regarding the battery power-off idle mode of step S23, please refer to Figure 15, which is an operating diagram of the sixth power supply mode of the charging station system of the present invention. When the battery 14-1, 14-2, ..., 14-N is converted from the discharging mode (discharging mode) to the charging mode (charging mode), the system needs to change to the battery recovery idle mode first. At this time, the AC to DC converter 11 does not convert the mains power V AC3 is the DC bus voltage V BUS To the DC bus 12. In this case, the DC to AC converter 24 of the AC discharge cabinet 2 first stops the single-phase AC power supply V AC1 Input to the AC discharge cabinet 2. Therefore, the mainboard 16 of the power station cabinet 1 provides a connection control signal S C1 The connecting switch 10 is controlled to be turned off to disconnect the second DC bus 21 from the DC bus 12. Since the batteries 14-1, 14-2, ..., 14-N are in the battery recovery idle mode, the uninterruptible power supply unit UPS provides the second state voltage V S2 To the main board 16 to maintain normal operation of the system.

[0085] After step S23, the system enters normal operation to charge batteries 14-1, 14-2, ..., 14-N (step S24). The operation of step S24 can refer to the operation of the aforementioned step S13, which will not be repeated here. If the judgment of step S22 is "no", it means that the system determines that batteries 14-1, 14-2, ..., 14-N are not in normal charging mode. At this time, batteries 14-1, 14-2, ..., 14-N only maintain system operation and return to step S17 to select the power supply battery again. It will not be repeated here. Similarly, if the judgment of step S21 is "no", it means that the system determines that the mains V AC3 Abnormal power supply, at this time, the batteries 14-1, 14-2, ..., 14-N only maintain the operation of the system, and return to step S17 to select the power supply battery again, which will not be repeated here.

[0086] Please refer to Figure 16, which is a block diagram of the first embodiment of the human-machine interface of the charging station system of the present invention. As shown in Figure 16, the charging station system includes a plurality of battery swap station cabinets 1-1 to 1-N and an AC discharge cabinet 2. The battery swap station cabinets 1-1 to 1-N are interconnected via a common bus, and the AC discharge cabinet 2 is connected to the battery swap station cabinets 1-1 to 1-N via a common bus. One of the battery swap station cabinets 1-1 to 1-N supplies power to the AC discharge cabinet 2, and the power supply process of the battery swap station cabinets 1-1 to 1-N to the AC discharge cabinet 2 is a time-free switching process. That is, assuming that the power supply is switched from the first battery swap station cabinet 1-1 to the Nth battery swap station cabinet 1-N to the AC discharge cabinet 2, during the power supply switching, the AC discharge cabinet 2 can seamlessly connect the power supply from the first battery swap station cabinet 1-1 to the Nth battery swap station cabinet 1-N, thereby maintaining the normal operation of the AC discharge cabinet 2. Incidentally, the above-mentioned power supply switching principle can be that the one with the highest output voltage of the battery swap station cabinets is used to power the AC discharge cabinet, but this is not intended to limit the present invention.

[0087] In addition, the charging station system also includes a human-machine interface HMI. The human-machine interface HMI is arranged inside one of the battery swap station cabinets (in this embodiment, the first battery swap station cabinet 1-1), and the first battery swap station cabinet 1-1 equipped with the human-machine interface HMI communicates with other battery swap station cabinets 1-2 to 1-N. Therefore, the user can interact with the machine or system more easily, intuitively and effectively by operating the human-machine interface HMI set in the first battery swap station cabinet 1-1 through a graphical user interface (GUI), a touch screen, a voice control interface, or even a virtual reality (VR) and augmented reality (AR interface), so as to improve operational efficiency and user experience, and thus have a comprehensive and accurate operation of the charging station system.

[0088] Furthermore, please refer to Figure 17, which is a block diagram of a first embodiment of the human-machine interface of the charging station system of the present invention. Unlike the embodiment shown in Figure 16, the human-machine interface (HMI) shown in Figure 17 is independently located outside the battery swap station cabinets 1-1 to 1-N and is connected to each of the battery swap station cabinets 1-1 to 1-N for communication via a control bus. Therefore, users can operate the HMI to fully and accurately control the charging station system.

[0089] The above description is only a detailed description and drawings of the preferred specific embodiments of the present invention, and the features of the present invention are not limited thereto and are not intended to limit the present invention. The full scope of the present invention shall be based on the scope of the patent application. All concepts that fall within the scope of the patent application of the present invention and embodiments with similar variations thereof shall be included in the scope of the present invention. Any changes or modifications that can be easily conceived by any person skilled in the art within the field of the present invention shall be included in the patent scope of the present disclosure.

Claims

1. A cabinet for a battery swap station, comprising: An AC-to-DC converter receives a three-phase AC power source and converts the three-phase AC power source into a DC bus voltage, wherein the DC bus voltage is established on a DC bus; A plurality of charge-discharge DC converters respectively receive the DC bus voltage and convert the DC bus voltage into a plurality of DC voltages; A plurality of batteries are correspondingly connected to the plurality of charge-discharge DC converters and receive the plurality of DC voltages; a first auxiliary DC converter, receiving the DC bus voltage and converting the DC bus voltage into a first state voltage; and A mainboard receives the first state voltage and a second state voltage, wherein the first state voltage is greater than the second state voltage; According to the state of the three-phase AC power supply, the mainboard outputs the first state voltage or the second state voltage to the plurality of batteries to maintain the power required for the plurality of batteries to operate without power outage.

2. The power station cabinet according to claim 1, wherein the mainboard includes: A switching contact, for receiving the first state voltage and the second state voltage; When the three-phase AC power source is disabled, the second state voltage is output from the mainboard to the multiple batteries via the switching contact to maintain the power required for the multiple batteries to operate without power outages; when the three-phase AC power source is enabled, the first state voltage is output from the mainboard to the multiple batteries via the switching contact to maintain the power required for the multiple batteries to operate without power outages.

3. The battery swap station cabinet according to claim 1, further comprising: A second auxiliary DC converter is coupled to the mainboard, receives any one of the plurality of DC voltages, and converts the DC voltage into the second state voltage.

4. The battery swap station cabinet according to claim 3, further comprising: A plurality of diodes, each of the diodes having an anode and a cathode; The anodes of the plurality of diodes are respectively connected to the plurality of charge-discharge paths between the plurality of charge-discharge DC converters and the plurality of batteries; the cathodes of the plurality of diodes are connected together and connected to the second auxiliary DC converter.

5. The battery swap station cabinet according to claim 1, further comprising: A DC converter receives the DC bus voltage and converts the DC bus voltage into a power supply voltage; as well as An air conditioning unit receives the supply voltage and is powered by the supply voltage to provide heat dissipation for the plurality of batteries.

6. The battery swap station cabinet as described in claim 1, wherein any one of the plurality of batteries is replaceable.

7. The battery swap station cabinet as claimed in claim 1, wherein any one of the plurality of charge-discharge DC converters is a bidirectional converter.

8. The power exchange station cabinet as claimed in claim 1, wherein the power exchange station cabinet provides an auxiliary power, and the voltage of the auxiliary power is between an upper limit voltage and a lower limit voltage; The first state voltage is not higher than the upper limit voltage, and the second state voltage is not lower than the lower limit voltage.

9. The battery swap station cabinet according to claim 1, further comprising: A plurality of diodes, each of the diodes having an anode and a cathode; The anodes of the plurality of diodes are respectively connected to the plurality of charge-discharge paths between the plurality of charge-discharge DC converters and the plurality of batteries; the cathodes of the plurality of diodes are connected together and connected to the first auxiliary DC converter. 10 . The battery swap station cabinet as claimed in claim 9 , wherein the first auxiliary DC converter further receives any one of the plurality of DC voltages and converts the DC voltage into the second state voltage.

11. The power station cabinet of claim 10, wherein when the three-phase AC power supply is disabled, the first auxiliary DC converter outputs the second state voltage, so that the second state voltage is output from the mainboard to the plurality of batteries; When the three-phase AC power source is enabled, the first auxiliary DC converter outputs the first state voltage, so that the first state voltage is output from the mainboard to the plurality of batteries.

12. The battery swap station cabinet according to claim 1, further comprising: An uninterruptible power supply unit generates the second state voltage; When the three-phase AC power supply is disabled, the uninterruptible power supply unit outputs the second state voltage, so that the second state voltage is output from the mainboard to the plurality of batteries; When the three-phase AC power source is enabled, the first auxiliary DC converter outputs the first state voltage, so that the first state voltage is output from the mainboard to the plurality of batteries.

13. The battery swap station cabinet as claimed in claim 12, wherein the uninterruptible power unit further receives the first state voltage and is powered by the first state voltage.

14. An AC discharge cabinet, comprising: a second DC bus, providing a DC bus voltage; a third auxiliary DC converter, receiving the DC bus voltage and converting the DC bus voltage into an operating voltage; a second mainboard, receiving the operating voltage; and A DC-to-AC converter receives the DC bus voltage and converts the DC bus voltage into an AC conversion voltage.

15. The AC discharge cabinet according to claim 14, further comprising: An input switch receives a control signal provided by the second mainboard and controls the on and off of the input switch through the control signal.

16. The AC discharge cabinet of claim 15, wherein the input switch receives a single-phase AC power source; When the AC conversion voltage can be used as an output voltage of the AC discharge cabinet, the second mainboard controls the input switch to be turned off through the control signal; When the AC conversion voltage cannot be used as the output voltage of the AC discharge cabinet, the second mainboard controls the input switch to be turned on through the control signal, so that the single-phase AC power supply is used as the output voltage of the AC discharge cabinet.

17. A charging station system, comprising: The battery swap station cabinet as claimed in any one of claims 1 to 13; and The AC discharge cabinet as claimed in any one of claims 14 to 16; The power station cabinet further includes a connection switch, which is connected between the DC bus and the second DC bus; The mainboard provides a connection control signal to control the on and off of the connection switch.

18. The charging station system as claimed in claim 17, wherein when the connecting switch is turned on so that the DC bus voltage on the DC bus is provided to the second DC bus via the connecting switch, the AC conversion voltage serves as the output voltage of the AC discharge cabinet.

19. The charging station system as claimed in claim 17, wherein when the connecting switch is turned off so that the DC bus voltage on the DC bus cannot be provided to the second DC bus via the connecting switch, the single-phase AC power source serves as the output voltage of the AC discharge cabinet.

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