CN109546721B - Charging device and control method - Google Patents

Abstract

The present application discloses a charging device and a control method. The charging device includes a first auxiliary bridge arm connected between a second port and a second module and a second auxiliary bridge connected between the third port and the third module Therefore, when the input AC power is single-phase AC power, the charging device can use at least the first module to convert the input AC power to charge the battery. On the contrary, when the input AC power is three-phase AC power, in addition to the first module In addition to converting the corresponding single-phase alternating current in the input alternating current, the second module and the third module also control the first auxiliary bridge arm and the second auxiliary bridge arm respectively to not work, so that the second module and the third module also convert the input respectively. The corresponding single-phase alternating current in alternating current.

Description

Charging device and control method

technical field

The present disclosure relates to a charging device, in particular, to a charging device that is applied to an electric vehicle and is compatible with a single-phase input power supply and a three-phase input power supply for charging.

Background technique

Due to the rise of environmental awareness, electric vehicles have gradually become popular, and in order to charge the batteries inside the electric vehicles, the electric vehicles will contain a charging device. The existing charging devices for electric vehicles can be divided into single-phase charging devices and three-phase charging devices according to the number of phases of the input power received. The output power of the phase charging device is typically 10kW. With the improvement of the battery life of the electric vehicle, the output power level of the charging device of the electric vehicle also increases, so the high-power charging device has become the mainstream in the current market.

However, since the existing three-phase charging device can only receive three-phase input power for charging, when the number of phases of the input power provided by the charging station where the electric vehicle is parked is single-phase input power, the electric vehicle cannot be charged. , and in order to solve this problem, the existing practice is only to equip an electric vehicle with a three-phase charging device with a single-phase portable charger, so as to provide the single-phase input power to the three-phase charging device, but this method is easy to cause Users have concerns about the safety of electricity when using it, as well as the lack of increased cost.

In addition, although the existing three-phase charging device can use a single-phase portable charger to receive the single-phase input power, because the three-phase charging device is designed to include three modules, each module is used to convert the three-phase input power Corresponding single-phase alternating current, so when the three-phase charging device receives single-phase input power, the three-phase charging device only uses one of the modules to operate, and the output power output by a single module has its limitations, resulting in the three-phase charging device. When receiving a single-phase input power supply, the output power cannot be increased according to the actual demand, for example, the current of the input power supply increases, so the output power of the existing three-phase charging device is limited.

Therefore, how to develop a charging device and a control method that overcomes the above shortcomings is an urgent need at present.

SUMMARY OF THE INVENTION

The main purpose of the present disclosure is to provide a charging device, so as to solve the problem that the existing charging device can only receive single-phase or three-phase input power for charging, and cannot be compatible with single-phase input power and three-phase input power, resulting in the lack of cost increase , and solves the limitation that if the existing charging device is a three-phase charging device and receives a single-phase input power supply, its output power cannot be improved.

In order to achieve the above object, a broader embodiment of the present disclosure is to provide a charging device that receives input AC power generated by a charging device for charging, and includes: an input end, including a first port, a second port, a third port, The neutral port and the control port, wherein when the input AC power is single-phase AC power, the input terminal receives the input AC power through the first port and the neutral line port, and when the input AC power is three-phase AC power, the input terminal passes through the first port and the second port. and the third port respectively receive the corresponding single-phase alternating current in the input alternating current; the first module is connected with the first port and the neutral port; the second module is connected with the second port and the neutral port; the third module is connected with the third port and Neutral port connection, wherein the output ends of the first module, the second module and the third module are connected to each other, and the first module, the second module and the third module respectively confirm that the input AC power is the single-phase AC power or the three-phase AC power; the first auxiliary bridge arm, connected between the first port and the second module; the second auxiliary bridge arm, connected between the first port and the third module; and the detection module, and the control port Connect and confirm the current magnitude of the input alternating current through the control port, and transmit the confirmation result to the first module, the second module and the third module, so that the first module, the second module and the third module correspondingly control the first module, the second module and the third module according to the confirmation result. Operation of an auxiliary bridge arm and a second auxiliary bridge arm;

Wherein, when the input AC power is three-phase AC power, the first module operates to convert the corresponding single-phase AC power in the input AC power, and the second module and the third module respectively control the first auxiliary bridge arm and the second auxiliary bridge arm not to work , so that the second module and the third module respectively convert the corresponding single-phase AC power in the input AC power, when the input AC power is single-phase AC power, and the output terminals of the first module, the second module and the third module are connected in parallel, The first module operates to convert the input AC power, and the second module and the third module respectively control the first auxiliary bridge arm and the second auxiliary bridge arm to selectively work or not work according to the current magnitude of the input AC power confirmed by the detection module, so that the The second module and the third module are selectively operated to convert the input AC power. When the input AC power is single-phase AC power and the outputs of the first module, the second module and the third module are connected in series, the second module and the third module are connected in series. The third module respectively controls the first auxiliary bridge arm and the second auxiliary bridge arm to work, and the first module, the second module and the third module work together to convert the input alternating current.

In order to achieve the above object, another broader embodiment of the present disclosure is to provide a control method suitable for a charging device, wherein the charging device receives an input alternating current generated by a charging device for charging, the charging device includes an input terminal, and the input terminal includes The first port, the second port and the third port, the charging device further includes a first module connected to the first port, a second module connected to the second port, a third module connected to the third port, and a first module connected to the first port. The first auxiliary bridge arm between the port and the second module and the second auxiliary bridge arm connected between the first port and the third module, wherein the output ends of the first module, the second module and the third module are mutually connect,

Wherein the control method comprises the steps: (a) when receiving the input AC power, confirming that the input AC power is single-phase AC power or three-phase AC power, when confirming that the input AC power is three-phase AC power, perform step (b), when confirming that the input AC power is When single-phase AC power is used, step (c) is performed; (b) the first module converts the corresponding single-phase AC power in the input AC power, and controls the first auxiliary bridge arm and the second auxiliary bridge arm to not work, so that the second module and the second auxiliary bridge arm do not work. The three modules respectively convert the corresponding single-phase alternating current in the input alternating current; and (c) the first module operates, and respectively controls the first auxiliary bridge arm and the second auxiliary bridge arm to selectively work or not work, so that the second module and the third auxiliary bridge arm are operated selectively. Three modules operate selectively.

In order to achieve the above object, another broader embodiment of the present disclosure is to provide a control method suitable for a charging device, wherein the charging device receives the input AC power generated by the charging device as single-phase AC power for charging, and the charging device comprises: The input end, the input end includes a first port and a neutral line port, and the charging device further includes a first module, a second module, a third module connected with the first port and the neutral line port, and a first module connected between the input end and the second module. an auxiliary bridge arm and a second auxiliary bridge arm connected between the input end and the third module, wherein the output ends of the first module, the second module and the third module are connected in parallel,

The control method includes the steps of: (d) controlling the operation of the first module when the input terminal receives the input alternating current; (e) judging whether the current of the input alternating current is less than or equal to the first current preset value, if the current of the input alternating current is less than or equal to the first Step (f) is executed if the current preset value, otherwise step (g) is executed; (f) control the first auxiliary bridge arm and the second auxiliary bridge arm to not work, so that the second module and the third module do not run; (g) Determine whether the current of the input alternating current is greater than the first preset current value and less than or equal to the second preset current value, and if the current of the input alternating current is greater than the first preset current value and less than or equal to the second preset current value, perform step (h ), otherwise perform step (i); (h) control the first auxiliary bridge arm to work and control the second auxiliary bridge arm to not work, make the second module and the first module operate in parallel and convert the input alternating current, and make the third module not and (i) controlling the first auxiliary bridge arm and the second auxiliary bridge arm to work, so that the second module, the third module and the first module operate in parallel and convert the input alternating current.

Description of drawings

FIG. 1 is a circuit structure diagram of a charging device according to a preferred embodiment of the disclosure.

FIG. 2 is a schematic flowchart of a control method applied to the charging device shown in FIG. 1 .

FIG. 3 is a schematic flowchart of sub-steps of step ( S3 ) shown in FIG. 2 .

4 is a schematic flowchart of another control method applied to the charging device shown in FIG. 1 when the input AC power received by the charging device is single-phase AC power.

FIG. 5 is a circuit structure diagram of a charging device according to a second preferred embodiment of the disclosure.

FIG. 6 is a circuit structure diagram of a charging device according to a third preferred embodiment of the disclosure.

FIG. 7 is a circuit structure diagram of a charging device according to a fourth preferred embodiment of the disclosure.

Description of reference numbers:

1: Charging device

2: Input terminal

21: The first port

22: The second port

23: The third port

24: Neutral port

25: Control port

250: The first detection port

251: The second detection port

31: The first module

311: The first bridge arm

312: Second bridge arm

32: Second module

321: First bridge arm

322: Second bridge arm

33: The third module

331: The first bridge arm

332: Second bridge arm

41: The first auxiliary bridge arm

42: Second auxiliary bridge arm

5: Detection module

P: Input AC

M11, M13, M21, M23, M31, M33: upper switch tube

M12, M14, M22, M24, M32, M34: lower switch tube

M25, M26, M35, M36: Controllable switch assemblies

O1～O8: Midpoint

C1, C2, C3: Capacitors

L1, L2, L3: Inductance

6: Conversion circuit

7: Control unit

S1~S3, S20~S25, M1~M6: Steps

Detailed ways

Some typical embodiments that embody the features and advantages of the present disclosure will be described in detail in the description that follows. It should be understood that the present disclosure can have various changes in different embodiments without departing from the scope of the present disclosure, and the descriptions and drawings therein are for illustrative purposes in nature, rather than limiting the present disclosure. .

Please refer to FIG. 1 , which is a schematic diagram of a circuit structure of a charging device according to a preferred embodiment of the present disclosure. As shown in the figure, the charging device 1 of the present disclosure can be applied to, but not limited to, an electric vehicle, and can receive an input AC power P generated by a charging device (not shown), such as a charging station, and the charging device 1 is used for The input AC power P is converted to generate output power to charge the battery (not shown) of the electric vehicle, wherein the input AC power P can be but not limited to single-phase AC power or three-phase AC power. The charging device 1 includes an input end 2 , a first module 31 , a second module 32 , a third module 33 , a first auxiliary bridge arm 41 , a second auxiliary bridge arm 42 and a detection module 5 .

The input end 2 can be connected to an output port of the charging device, such as a charging gun, to receive the input AC power P provided by the charging device, and includes a first port 21 , a second port 22 , a third port 23 , a neutral port 24 and Control port 25. When the input AC power P is single-phase AC power, the input terminal 2 receives the input AC power P through the first port 21 and the neutral port 24 , and when the input AC power P is three-phase AC power, the input terminal 2 receives the input AC power P through the first port 21 . , the second port 22 and the third port 23 respectively receive the corresponding single-phase alternating current in the input alternating current P. As for the control port 25, the current magnitude of the input alternating current P can be reflected. The detection module 5 can be used to confirm the current magnitude of the input alternating current P received by the input terminal 2 . In some embodiments, the neutral line port 24 of the input end 2 can be connected to the output port of the charging device through a neutral line (not shown).

The first module 31 is connected to the first port 21 and the neutral port 24 for converting the received power during operation. The second module 32 is connected to the second port 22 and the neutral port 24 for converting the received power during operation. The third module 33 is connected to the third port 23 and the neutral port 24 for converting the received power during operation. In addition, the outputs of the first module 31 , the second module 32 and the third module 33 are further connected to each other, for example, connected to the battery of the electric vehicle in parallel. And the first module 31 , the second module 32 and the third module 33 can respectively confirm that the input AC power P is single-phase AC power or three-phase AC power. In some embodiments, the first module 31 , the second module 32 , and the third module 33 may be respectively constituted by single-phase converters. In addition, regardless of whether the input AC power P is single-phase AC power or three-phase AC power, the first module 31 operates to convert the power. In some embodiments, the output power of the first module 31 , the second module 32 and the third module 33 may be, but not limited to, 3.3kW, respectively.

The first auxiliary bridge arm 41 is connected between the first port 21 and the second module 32 . The second auxiliary bridge arm 42 is connected between the first port 21 and the third module 33 . The detection module 5 is connected to the control port 25 and communicates with the control port 25 , and is used to confirm the current magnitude of the input alternating current P. In addition, the detection module 5 can also be connected with the first module 31 , the second module 32 and the third module 33 , and transmit the confirmation result of the current magnitude of the input AC power P to the first module 31 , the second module 32 and the third module 33 , and the second module 32 and the third module 33 respectively control the operation of the first auxiliary bridge arm 41 and the second auxiliary bridge arm 42 according to the confirmation result.

In the above embodiment, the output ends of the first module, the second module and the third module are connected in parallel.

To further illustrate, when the input terminal 2 receives the input AC power P as three-phase AC power through the first port 21, the second port 22 and the third port 23, the first module 31 is running at this time, so the first module 31 is Convert the corresponding single-phase AC power in the input AC power P received by the first port 21, and at the same time, because the first module 31, the second module 32 and the third module 33 respectively confirm that the input AC power P is three-phase AC power, the second The module 32 and the third module 33 respectively control the first auxiliary bridge arm 41 and the second auxiliary bridge arm 42 to not work. Since the first auxiliary bridge arm 41 does not work, the first port 21 receives the corresponding single-phase input AC power P. The AC power cannot be output to the first auxiliary bridge arm 41 , but the second port 22 receives the corresponding single-phase AC power in the input AC power P and outputs it to the second module 32 , so that the second module 32 converts the input from the second port 22 The corresponding single-phase alternating current in the alternating current P. In addition, because the second auxiliary bridge arm 42 does not work, the first port 21 receives the corresponding single-phase alternating current in the input alternating current P and cannot output it to the second auxiliary bridge arm 42, but the third port 23 receives the corresponding single-phase alternating current in the input alternating current P. The single-phase AC power is output to the third module 33 , so that the third module 33 converts the corresponding single-phase AC power in the input AC power P transmitted from the third port 23 .

When the input terminal 2 receives the input AC power P as single-phase AC power through the first port 21 and the neutral port 24, and the output terminals of the first module, the second module and the third module are connected in parallel, if When the current of the input AC power P is less than or equal to the first current preset value, for example, 16A, the second module 32 and the third module 33 respectively control the first auxiliary bridge arm 41 and the second auxiliary bridge arm 42 to not work. The first module 31 converts the received power while the second module 32 and the third module 33 do not convert the received power, so the first module 31 is the input of the first port 21 and the neutral port 24 The alternating current P is converted to supply the battery for charging. At the same time, in order to increase the output power of the charging device 1 according to the actual demand when receiving the single-phase input power, when the first module 31 , the second module 32 and the third module 33 pass through the first port 21 and the second port respectively 22. When the third port 23 confirms that the input AC power P is single-phase AC power, and the detection module 5 confirms the current size of the input AC power P and transmits the confirmation result to the first module 31, the second module 32 and the third module 33, The first module 31 , the second module 32 and the third module 33 respectively control the first auxiliary bridge arm 41 and the second auxiliary bridge arm 42 to selectively work or not work, so that the second module 32 and the third module 33 are selectively The received electrical energy is converted to the ground, thereby selectively increasing the output power of the charging device 1 . If the current of the input AC power P is greater than the first preset current value and less than or equal to the second preset current value, eg, 32A, the second module 32 controls the first auxiliary bridge arm 41 to work, and the third module 33 controls the second auxiliary bridge The arm 42 does not work, and the input AC power P received by the first port 21 is output to the first auxiliary bridge arm 41 , so that the input AC power P can be converted by the first auxiliary bridge arm 41 and the second module 32 . At the same time, the input AC power P received by the first port 21 cannot be output to the second auxiliary bridge arm 42, so that the second auxiliary bridge arm 42 and the third module 33 cannot be used for power conversion, so the third module 33 does not convert all received power. At this time, the second module 32 and the first module 31 are connected in parallel to convert the received electrical energy while the third module 33 does not convert the received electrical energy. Therefore, the output electrical energy generated by the charging device 1 is generated by the first module 31 and the second module. 32 offers. If the current of the input AC power P is greater than the second current preset value, the second module 32 and the third module 33 respectively control the first auxiliary bridge arm 41 and the second auxiliary bridge arm 42 to work, and the input AC power P received by the first port 21 is output to the first auxiliary bridge arm 41 and the second auxiliary bridge arm 42 , so that the input alternating current P can be converted by the first auxiliary bridge arm 41 , the second module 32 , the second auxiliary bridge arm 42 and the third module 33 . When the second module 32 , the third module 33 and the first module 31 convert the received electric energy in parallel, the output electric energy generated by the charging device 1 is provided by the first module 31 , the second module 32 and the third module 33 .

As can be seen from the above, since the charging device 1 of the present disclosure is provided with the first auxiliary bridge arm 41 connected between the first port 21 and the second module 32 and the first auxiliary bridge arm 41 connected between the first port 21 and the third module 33 There are two auxiliary bridge arms 42. Therefore, when the input AC power P is single-phase AC power, the charging device 1 can at least use the first module 31 to convert the input AC power P to charge the battery. On the contrary, when the input AC power P is three-phase AC power In the case of phase AC power, in addition to the first module 31 converting the corresponding single-phase AC power in the input AC power P, the second module 32 and the third module 33 further control the first auxiliary bridge arm 41 and the second auxiliary bridge arm 42 respectively. not working, so that the second module 32 and the third module 33 also convert the corresponding single-phase alternating current in the input alternating current P, so the charging device 1 of the present disclosure does not need to be equipped with an additional portable charger, and can be compatible with single-phase alternating current The electrical energy is converted into the input AC power P for the input AC power P of the three-phase AC power. Therefore, the charging device 1 of the present disclosure can not only improve the safety of electricity consumption during use, but also reduce the overall cost of the electric vehicle. In addition, when the input AC power P is single-phase AC power and the outputs of the first module 31 , the second module 32 and the third module 33 are connected in parallel, in addition to the first module 31 converting the input AC power P, because The detection module 5 of the present disclosure also enables the second module 32 and the third module 33 to respectively control the first auxiliary bridge arm 41 and the second auxiliary bridge arm 42 to selectively work or not to work according to the magnitude of the input alternating current P, so that the The second module 32 and the third module 33 selectively convert the input AC power P, so the charging device 1 can actually use at least one or more modules to convert the input AC power P according to the current of the input AC power P. In this way, charging The device 1 achieves the advantage of selectively increasing the output power.

Please continue to refer to FIG. 1 , in this embodiment, the first module 31 has a first bridge arm 311 and a second bridge arm 312 connected in parallel, wherein the first bridge arm 311 includes an upper switch M11 and a lower switch M11 connected in series The second bridge arm 312 includes two switch components formed by the switch tube M12 and the upper switch tube M13 and the lower switch tube M14 connected in series. The second module 32 has a first bridge arm 321 and a second bridge arm 322 connected in parallel with the first auxiliary bridge arm 41 , wherein the first bridge arm 321 includes an upper switch M21 and a lower switch M22 connected in series. The second bridge arm 322 includes two switch components composed of an upper switch tube M23 and a lower switch tube M24 connected in series. The third module 33 has a first bridge arm 331 and a second bridge arm 332 connected in parallel with the second auxiliary bridge arm 42 , wherein the first bridge arm 331 includes an upper switch M31 and a lower switch M32 that are connected in series The second bridge arm 332 includes two switch components composed of an upper switch tube M33 and a lower switch tube M34 connected in series. The first auxiliary bridge arm 41 includes two controllable switch assemblies (M25, M26) connected in series, and the second auxiliary bridge arm 42 includes two controllable switch assemblies (M35, M36) connected in series. In some embodiments, the upper switch tube M11 of the first bridge arm 311 of the first module 31 , the upper switch tube M13 of the second bridge arm 312 of the first module 31 , and the upper switch tube M13 of the first bridge arm 321 of the second module 32 The switch tube M21, the upper switch tube M23 of the second bridge arm 322 of the second module 32, the upper switch tube M31 of the first bridge arm 331 of the third module 33, and the upper switch tube of the second bridge arm 332 of the third module 33 M33 are respectively controllable switches, preferably thyristors, respectively. In addition, the lower switch M12 of the first bridge arm 311 of the first module 31 , the lower switch M14 of the second bridge arm 312 of the first module 31 , The lower switch M22 of the first bridge arm 321 of the second module 32 , the lower switch M24 of the second bridge arm 322 of the second module 32 , the lower switch M32 of the first bridge arm 331 of the third module 33 and the third The lower switch tubes M34 of the second bridge arm 332 of the module 33 are diodes respectively. In this embodiment, the upper switch tube M11 of the first bridge arm 311 of the first module 31 , the upper switch tube M13 of the second bridge arm 312 of the first module 31 , and the first bridge arm of the second module 32 can be controlled by The upper switch tube M21 of 321 , the upper switch tube M23 of the second bridge arm 322 of the second module 32 , the upper switch tube M31 of the first bridge arm 331 of the third module 33 , and the second bridge arm 332 of the third module 33 The conduction angle of the upper switch tube M33 can reduce the surge current of the first module 31 , the second module 32 and the third module 33 respectively.

In another embodiment, the lower switch M12 of the first bridge arm 311 of the first module 31 , the lower switch M14 of the second bridge arm 312 of the first module 31 , and the first bridge arm 321 of the second module 32 The lower switch M22, the lower switch M24 of the second bridge arm 322 of the second module 32, the lower switch M32 of the first bridge arm 331 of the third module 33, and the lower switch of the second bridge arm 332 of the third module 33 The transistors M34 are respectively controllable switch transistors, preferably thyristors, respectively, and the upper switch transistor M11 of the first bridge arm 311 of the first module 31 , the upper switch transistor M13 of the second bridge arm 312 of the first module 31 , The upper switch M21 of the first bridge arm 321 of the second module 32 , the upper switch M23 of the second bridge arm 322 of the second module 32 , the upper switch M31 of the first bridge arm 331 of the third module 33 and the third The upper switch tubes M33 of the second bridge arm 332 of the module 33 are diodes respectively. In yet another embodiment, the upper switch M11 and the lower switch M12 of the first bridge arm 311 of the first module 31 , the upper switch M13 and the lower switch M14 of the second bridge arm 312 of the first module 31 , the first The upper switch M21 and the lower switch M22 of the first bridge arm 321 of the second module 32 , the upper switch M23 and the lower switch M24 of the second bridge arm 322 of the second module 32 , and the first bridge arm of the third module 33 The upper switch tube M31 and the lower switch tube M32 of the 331, and the upper switch tube M33 and the lower switch tube M34 of the second bridge arm 332 of the third module 33 are respectively controllable switch tubes or diodes. In a preferred embodiment, The controllable switches are all thyristors. In addition, the two controllable switch components ( M25 , M26 ) of the first auxiliary bridge arm 41 and the two controllable switch components ( M35 , M36 ) of the second auxiliary bridge arm 42 are, for example, thyristors, respectively.

In addition, the first port 21 is connected to the upper switch tube M13 of the second bridge arm 312 of the first module 31 and the midpoint O2 of the lower switch tube M14, and two controllable switch components (M25, The midpoint O5 of M26) and the midpoint O8 of the two controllable switch assemblies (M35, M36) of the second auxiliary bridge arm 42. The second port 22 is connected to the midpoint O4 of the upper switch M23 and the lower switch M24 of the second bridge arm 322 of the second module 32 . The third port 23 is connected to the midpoint O7 of the upper switch tube M33 and the lower switch tube M34 of the second bridge arm 332 of the third module 33 . The neutral port 24 is connected to the upper switch tube M11 of the first bridge arm 311 of the first module 31 and the midpoint O1 of the lower switch tube M12 , and the upper switch tube M21 and the lower switch tube of the first bridge arm 321 of the second module 32 . The midpoint O3 of M22 and the midpoint O6 of the upper switch tube M31 and the lower switch tube M32 of the first bridge arm 331 of the third module 33 .

In some embodiments, the first module 31 , the second module 32 and the third module 33 further respectively include a conversion circuit 6 , wherein the input end of the conversion circuit 6 of the first module 31 is connected to the first bridge of the first module 31 . The arm 311 is connected to the second bridge arm 312 of the first module 31 , and the input end of the conversion circuit 6 of the second module 32 is connected to the first bridge arm 321 of the second module 32 , the second bridge arm 322 of the second module 32 and the The first auxiliary bridge arm 41 is connected, and the input end of the conversion circuit 6 of the third module 33 is connected to the first bridge arm 331 of the third module 33 , the second bridge arm 332 of the third module 33 and the second auxiliary bridge arm 42 In addition, the output terminal of the conversion circuit 6 of the first module 31, the output terminal of the conversion circuit 6 of the second module 32 and the output terminal of the conversion circuit 6 of the third module 33 are connected to each other, for example, connected to the charging device in parallel 1 output. In other embodiments, the conversion circuit 6 of the first module 31, the conversion circuit 6 of the second module 32, and the conversion circuit 6 of the third module 33 may respectively include a power factor correction circuit and a DC/DC conversion circuit, but not This is the limit. In another embodiment, the first module 31 , the second module 32 and the third module 33 further include a control unit 7 respectively, wherein the control unit 7 of the first module 31 is connected to the first port 21 and the neutral port 24 , The control unit 7 of the second module 32 is connected to the first port 21 , the second port 22 and the neutral port 24 , the control unit 7 of the third module 33 is connected to the first port 21 , the third port 23 and the neutral port 24 , The control units 7 of the first module 31 , the second module 32 and the third module 33 are used to respectively confirm that the input AC power P is single-phase AC power or three-phase AC power. And the control unit 7 of the first module 31, the control unit 7 of the second module 32, and the control unit 7 of the third module 33 are respectively connected to the detection module 5, which can respectively receive the detection module 5 to confirm the magnitude of the current of the input alternating current P. The confirmation result is confirmed, and the control unit 7 of the second module 32 and the control unit 7 of the third module 33 can respectively control the first auxiliary bridge arm 41 and the second auxiliary bridge arm 42 to selectively work or not work according to the confirmation result.

In some embodiments, the control port 25 further includes a first detection port 250 and a second detection port 251 . The first detection port 250 or the second detection port 251 is used to detect the magnitude of the current of the input alternating current P, and provide the detected result to the detection module 5 by means of communication.

Please refer to FIG. 2 in conjunction with FIG. 1 , wherein FIG. 2 is a schematic flowchart of a control method applied to the charging device shown in FIG. 1 . As shown in FIG. 1 and FIG. 2 , firstly, step S1 is performed, and when the input AC power P is received, it is confirmed that the input AC power P is single-phase AC power or three-phase AC power. When the judgment result of step S1 is that the input AC power P is three-phase AC power, step S2 is executed, that is, the first module 31 converts the corresponding single-phase AC power in the input AC power P, and controls the first auxiliary bridge arm 41 and the second auxiliary bridge The arm 42 does not work, so that the second module 32 and the third module 33 convert the corresponding single-phase alternating current in the input alternating current P, respectively. Conversely, when the judgment result of step S1 is that the input AC power P is single-phase AC power, step S3 is executed, that is, the first module 31 operates, and controls the first auxiliary bridge arm 41 and the second auxiliary bridge arm 42 to selectively work or Inactive, the second module 32 and the third module 33 are selectively operated. The selectivity in step S3 means that the first auxiliary bridge arm 41 and the second auxiliary bridge arm 42 can work, not work, or switch between work and non-work according to actual needs and settings.

In this embodiment, since the output terminals of the first module 31 , the second module 32 and the third module 33 are connected in parallel, in step S3 , in fact, according to the current size of the input AC power P confirmed by the detection module 5 The first auxiliary bridge arm 41 and the second auxiliary bridge arm 42 are respectively controlled to selectively work or not work, so that the second module 32 and the third module 33 are selectively operated.

Please refer to FIG. 3 in conjunction with FIG. 1 and FIG. 2 , wherein FIG. 3 is a schematic flowchart of the sub-steps of step ( S3 ) shown in FIG. 2 . As shown in FIG. 3 , when the input AC power P received by the charging device 1 is single-phase AC power, and the output terminals of the first module 31 , the second module 32 and the third module 33 are connected in parallel, step S20 is executed , to control the operation of the first module 31 . Next, step S21 is executed to determine whether the current of the input alternating current P is less than or equal to the first preset current value. If the determination in step S21 is yes, step S22 is executed, that is, the first auxiliary bridge arm 41 and the second auxiliary bridge arm 42 are controlled to be disabled, so that the second module 32 and the third module 33 are disabled. If the determination in step S21 is NO, go to step S23 to determine whether the current of the input alternating current P is greater than the first current preset value and less than or equal to the second current preset value, if the determination in step S23 is yes, execute step S24 to control the first auxiliary The bridge arm 41 works and controls the second auxiliary bridge arm 42 not to work, so that the second module 32 operates in parallel with the first module 31 and converts the input AC power P, and makes the third module 33 do not operate, if the judgment in step S23 is no, execute In step S25 , the first auxiliary bridge arm 41 and the second auxiliary bridge arm 42 are controlled to work, so that the second module 32 , the third module 33 and the first module 31 are operated in parallel and the input AC power P is converted.

Please refer to FIG. 4 in conjunction with FIG. 1 . FIG. 4 is a schematic flowchart of another control method applied to the charging device shown in FIG. 1 when the input AC power received by the charging device is single-phase AC power. As shown in FIG. 4 , when the input AC power P received by the charging device 1 is single-phase AC power, and the output terminals of the first module 31 , the second module 32 and the third module 33 are connected in parallel, the The control method is to perform step M1 first, and control the operation of the first module 31 when the input terminal 2 receives the input alternating current P. After step M1 is performed, step M2 is performed, that is, it is determined whether the current of the input alternating current P is less than or equal to the first preset current value. If the determination in step M2 is yes, step M3 is executed, that is, the first auxiliary bridge arm 41 and the second auxiliary bridge arm 42 are controlled to be disabled, so that the second module 32 and the third module 33 are disabled. If step M2 is judged to be no, go to step M4 to judge whether the current of the input AC power P is greater than the first current preset value and less than or equal to the second current preset value, if step M4 is judged to be yes, go to step M5 to control the first auxiliary The bridge arm 41 works and controls the second auxiliary bridge arm 42 not to work, so that the second module 32 is operated in parallel with the first module 31 and the input AC power P is converted, and the third module 33 is not operated, if the step M4 is judged to be no, execute In step M6, the first auxiliary bridge arm 41 and the second auxiliary bridge arm 42 are controlled to operate, so that the second module 32, the third module 33 and the first module 31 are operated in parallel and the input AC power P is converted.

Of course, the output terminals of the first module 31 , the second module 32 and the third module 33 are not limited to those shown in FIG. 1 , but are connected to each other in parallel. As shown in FIG. 5 , the first module 31 , the output terminals of the second module 32 and the third module 33 are connected in series instead. The output terminals corresponding to the first module 31 , the second module 32 and the third module 33 are connected in series, so if the input terminal 2 receives the input AC power P as single-phase AC power through the first port 21 and the neutral port 24 , then The second module 32 and the third module 33 respectively control the first auxiliary bridge arm 41 and the second auxiliary bridge arm 42 to work, and the first module 31 , the second module 32 and the third module 33 work together to convert the input AC power P , so the output power generated by the charging device 1 is provided by the first module 31 , the second module 32 and the third module 33 . In addition, because the output terminals of the first module 31 , the second module 32 and the third module 33 are connected in series instead, the output terminals of the conversion circuit 6 of the first module 31 and the output terminals of the conversion circuit 6 of the second module 32 are connected in series. The output terminal and the output terminal of the conversion circuit 6 of the third module 33 are connected in series to the output terminal of the charging device 1 .

In addition, the control method applied to the charging device shown in FIG. 5 is actually similar to the control method shown in FIG. 2 , but the output terminals of the first module 31 , the second module 32 and the third module 33 are They are connected in series, so under the condition of step S2 of the control method shown in FIG. 2 , step S2 of the control method shown in FIG. 2 actually controls the first auxiliary bridge arm 41 and the second auxiliary bridge arm 42 to work respectively. , so that the first module 31 , the second module 32 and the third module 33 operate together. Since most of the circuit structures and operations shown in FIG. 1 and FIG. 5 are similar, only the differences between the two are described above, and the same content will not be repeated.

Please refer to FIG. 6 , which is a circuit structure diagram of a charging device according to a third preferred embodiment of the present disclosure. As shown in the figure, the charging device 1 of this embodiment includes an input end 2 , a first module 31 , a second module 32 , a third module 33 , a first auxiliary bridge arm 41 , a second auxiliary bridge arm 42 and a detection module 5 , Its structure and action are respectively similar to the input end 2 , the first module 31 , the second module 32 , the third module 33 , the first auxiliary bridge arm 41 , the second auxiliary bridge arm 42 and the detection module 5 shown in FIG. 1 . Therefore, the same reference numerals are used here to represent similar structures and functions, and no further description will be given. In this embodiment, the two switch components of the first bridge arm 311 of the first module 31 may be transistors, the two switch components of the first bridge arm 321 of the second module 32 may be transistors, and the The two switch components of the first bridge arm 331 may be transistors.

In addition, the first module 31 of this embodiment further has a capacitor C1 and an inductor L1 , the capacitor C1 is connected in parallel with the first bridge arm 311 of the first module 31 , and one end of the inductor L1 is connected to the first bridge arm of the first module 31 . The midpoint O1 of the two switch components of 311, and the other end of the inductor L1 is connected to the neutral line port 24. The second module 32 in this embodiment further has a capacitor C2 and an inductor L2 . The capacitor C2 is connected in parallel with the first bridge arm 321 of the second module 32 , and one end of the inductor L2 is connected to the first bridge arm 321 of the second module 32 . The midpoint O2 of the two switch components and the other end of the inductor L2 are connected to the neutral port 24 . The third module 33 in this embodiment further has a capacitor C3 and an inductor L3 , the capacitor C3 is connected in parallel with the first bridge arm 331 of the third module 33 , and one end of the inductor L3 is connected to the first bridge arm 331 of the third module 33 . At the midpoint 3 of the two switch components, the other end of the inductor L3 is connected to the neutral port 24 .

In the embodiment shown in FIG. 6 , the two switch components of the first bridge arm 311 of the first module 31 , the capacitor C1 of the first module 31 and the inductance L1 of the first module 31 constitute a first totem pole power factor. Correction circuit. The two switch components of the first bridge arm 321 of the second module 32 , the capacitor C2 of the second module 32 and the inductance L2 of the second module 32 constitute a second totem pole power factor correction circuit. The two switch components of the first bridge arm 331 of the third module 33 , the capacitor C3 of the third module 33 and the inductance L3 of the third module 33 constitute a third totem-pole power factor correction circuit. The two switch components of the first bridge arm 311 of the first module 31 , the capacitor C1 of the first module 31 and the inductance L1 of the first module 31 can constitute a totem-pole power factor correction circuit. The two switch components of the first bridge arm 321 of the second module 32 , the capacitor C2 of the second module 32 and the inductance L2 of the second module 32 can constitute a totem-pole power factor correction circuit. The two switch components of the first bridge arm 331 of the third module 33 , the capacitor C3 of the third module 33 and the inductance L3 of the third module 33 can constitute a totem-pole power factor correction circuit, so the first module 31 shown in FIG. 6 The conversion circuits 6 of the second module 32 and the third module 33 can respectively only include a DC/DC conversion circuit (not shown) without additionally setting a power factor correction circuit, so the charging device 1 shown in FIG. The components can be simplified and the advantage of lower cost can be achieved, and because the first module 31 , the second module 32 and the third module 33 of the charging device 1 of the embodiment shown in FIG. 6 respectively use corresponding totem pole power factor correction circuits In order to carry out the operation of power factor correction, it has the advantage of high efficiency.

Of course, the output terminals of the first module 31 , the second module 32 and the third module 33 are not limited to those shown in FIG. 6 , and can be connected in parallel to the battery of the electric vehicle. In some embodiments, the output terminals may be as shown in FIG. 7 As shown, the output terminals of the first module 31 , the second module 32 and the third module 33 can be connected to the battery of the electric vehicle in series with each other. Of course, the control method shown in FIG. 2 , FIG. 3 and FIG. 4 of the present disclosure can also be applied to the charging device shown in FIG. 6 , and the control method shown in FIG. 5 of the present disclosure can also be applied to the charging device shown in FIG. 7 . Therefore, it will not be repeated here.

In the embodiments shown in FIGS. 6 and 7 , the two switch components of the second bridge arm 312 of the first module 31 are controllable switching devices, such as thyristors, and the two switch components of the second bridge arm 322 of the second module 32 are The switch components are controllable switching devices, such as thyristors, and the two switching components of the second bridge arm 332 of the third module 33 are controllable switching devices, such as thyristors. In another embodiment, the two switch components of the second bridge arm 312 of the first module 31 may also be uncontrollable switching devices, such as diodes, and the two switch components of the second bridge arm 322 of the second module 32 may also be The two switching components of the second bridge arm 332 of the third module 33 can also be uncontrollable switching devices, such as diodes, which are uncontrollable switching devices.

To sum up, the present application discloses a charging device, because the charging device includes a first auxiliary bridge arm connected between the first port and the second module and a bridge connected between the first port and the third module The second auxiliary bridge arm, so when the input AC power is three-phase AC power, in addition to the first module that can convert the corresponding single-phase AC power in the input AC power, the second module and the third module further control the first auxiliary bridge arm respectively. And the second auxiliary bridge arm does not work, so that the second module and the third module also respectively convert the corresponding single-phase AC power in the input AC power. On the contrary, when the input AC power is single-phase AC power, the charging device can use at least the first module to The input AC power is converted to charge the battery, so the charging device of the present disclosure does not need to be equipped with an additional portable charger, and can be compatible to convert the input AC power into single-phase AC power or input AC power for three-phase AC power, Therefore, the charging device of the present disclosure can not only improve the safety of electricity consumption during use, but also reduce the overall cost of the electric vehicle.

In addition, when the input AC power is single-phase AC power and the outputs of the first module, the second module and the third module are connected in parallel, in addition to the first module converting the input AC power, the detection module of the present disclosure can The second module and the third module respectively control the first auxiliary bridge arm and the second auxiliary bridge arm to selectively work or not work according to the current magnitude of the input AC power, so that the second module and the third module selectively convert the input AC power Therefore, the charging device can actually use at least one or more modules to convert the input AC power according to the current magnitude of the input AC power. In this way, the charging device of the present disclosure achieves the advantage of selectively increasing the output power.

Claims (21)

1. A charging device that receives an input alternating current generated by a charging device for charging, characterized in that, comprising: An input terminal includes a first port, a second port, a third port, a neutral port and a control port, wherein when the input AC power is a single-phase AC power, the input terminal passes through the first port and the control port. The neutral port receives the input AC power, and when the input AC power is a three-phase AC power, the input terminal receives the corresponding single-phase AC power in the input AC power through the first port, the second port and the third port respectively; a first module, connected with the first port and the neutral port; a second module, connected with the second port and the neutral port; a third module connected to the third port and the neutral port, wherein the output ends of the first module, the second module and the third module are connected to each other, and the first module, the second module and the The third module respectively confirms that the input AC power is the single-phase AC power or the three-phase AC power; a first auxiliary bridge arm connected between the first port and the second module; a second auxiliary bridge arm connected between the first port and the third module; and a detection module for confirming the magnitude of the input AC current, and transmitting the confirmation result to the first module, the second module and the third module, so that the first module, the second module and the third module correspondingly controlling the operation of the first auxiliary bridge arm and the second auxiliary bridge arm according to the confirmation result; Wherein, when the input AC power is the three-phase AC power, the first module operates to convert the corresponding single-phase AC power in the input AC power, and the second module and the third module respectively control the first auxiliary bridge arm and the The second auxiliary bridge arm does not work, so that the second module and the third module respectively convert the corresponding single-phase AC power in the input AC power, when the input AC power is the single-phase AC power, and the first module, the third module When the output terminals of the second module and the third module are connected in parallel, the first module operates to convert the input AC power, and the second module and the third module are determined according to the current magnitude of the input AC power confirmed by the detection module. respectively control the first auxiliary bridge arm and the second auxiliary bridge arm to selectively work or not work, so that the second module and the third module are selectively operated to convert the input alternating current, when the input alternating current is the single When the output terminals of the first module, the second module and the third module are connected in series, the second module and the third module respectively control the first auxiliary bridge arm and the second auxiliary bridge arm The bridge arm works, and the first module, the second module and the third module work together to convert the input alternating current. 2 . The charging device of claim 1 , wherein the input AC power is the single-phase AC power, the output ends of the first module, the second module and the third module are connected in parallel, and the second module is connected in parallel. 3 . When the module and the third module confirm through the detection module that the current of the input alternating current is less than or equal to a first current preset value, the second module and the third module respectively control the first auxiliary bridge arm and the second auxiliary bridge The arm is inactive, causing the first module to convert the input AC power and neither the second module nor the third module to convert the input AC power. 3 . The charging device of claim 1 , wherein the input AC power is the single-phase AC power, the output ends of the first module, the second module and the third module are connected in parallel, and the second module is connected in parallel. 4 . When the module and the third module confirm through the detection module that the current of the input alternating current is greater than a first current preset value and less than or equal to a second current preset value, the second module controls the operation of the first auxiliary bridge arm and the The third module controls the second auxiliary bridge arm to not work, so that the second module operates in parallel with the first module and converts the input AC power, and the third module does not convert the input AC power. 4. The charging device according to any one of claims 2 or 3, wherein the default value of the first current is 16A. 5 . The charging device of claim 1 , wherein the input AC power is the single-phase AC power, the output ends of the first module, the second module and the third module are connected in parallel, and the second module is connected in parallel. 6 . When the module and the third module confirm through the detection module that the current of the input AC power is greater than a second current preset value, the second module and the third module respectively control the first auxiliary bridge arm and the second auxiliary bridge arm working, making the second module, the third module and the first module operate in parallel and converting the input alternating current. 6. The charging device according to any one of claims 3 or 5, wherein the default value of the second current is 32A. 7. The charging device of claim 1, wherein the first module, the second module and the third module respectively have a first bridge arm and a second bridge arm, each of the first bridge arm and each The second bridge arm respectively includes two switch components composed of an upper switch tube and a lower switch tube connected in series, the first auxiliary bridge arm and the second auxiliary bridge arm respectively include two controllable bridge arms connected in series switch assembly. 8. The charging device of claim 7, wherein each of the upper switch tubes is a controllable switch component. 9. The charging device of claim 7, wherein each of the lower switch tubes is a controllable switch component. 10. The charging device of claim 7, 8 or 9, wherein each of the controllable switch components is a thyristor. 11. The charging device of claim 7, wherein the first port is connected to a midpoint of the two switch components of the second bridge arm of the first module, and two of the switchable components of the first auxiliary bridge arm The midpoint of the controllable switch assembly and the midpoint of the two controllable switch assemblies of the second auxiliary bridge arm, the second port is connected to the midpoint of the two switch assemblies of the second bridge arm of the second module , the third port is connected to the midpoint of the two switch assemblies of the second bridge arm of the third module, and the neutral port is connected to the middle of the two switch assemblies of the first bridge arm of the first module point, the midpoint of the two switch assemblies of the first bridge arm of the second module and the midpoint of the two switch assemblies of the first bridge arm of the third module. 12. The charging device of claim 7, wherein the two switch components of the first bridge arm of the first module, the two switch components of the first bridge arm of the second module, and the third The two switch components of the first bridge arm of the module are respectively a transistor, and the first module, the second module and the third module also have a capacitor and an inductor respectively, and each of the capacitors is respectively associated with a corresponding The first bridge arms are connected in parallel, one end of each of the inductors is respectively connected to the midpoint of the two transistors of the corresponding first bridge arm, and the other end of each of the inductors is respectively connected to the neutral port. 13. The charging device of claim 12, wherein the two switch components of the second bridge arm of the first module, the two switch components of the second bridge arm of the second module, and the third The two switch components of the second bridge arm of the module are respectively a controllable switch device. 14. The charging device of claim 12, wherein the two switch components of the second bridge arm of the first module, the two switch components of the second bridge arm of the second module, and the third The two switch components of the second bridge arm of the module are respectively an uncontrollable switch device. 15 . The charging device of claim 7 , wherein the first module, the second module and the third module further comprise a conversion circuit respectively, and the input end of the conversion circuit of the first module is connected to the first module 15 . The first bridge arm and the second bridge arm of the first module are connected, and the input end of the conversion circuit of the second module is connected to the first bridge arm of the second module and the second bridge arm of the second module. The bridge arm and the first auxiliary bridge arm are connected, and the input end of the conversion circuit of the third module is connected to the first bridge arm of the third module, the second bridge arm of the third module and the second auxiliary bridge The arms are connected, and the output end of the conversion circuit of the first module, the output end of the conversion circuit of the second module, and the output end of the conversion circuit of the third module are connected to each other. 16. The charging device of claim 1, wherein the first module, the second module and the third module respectively comprise a control unit, the control unit of the first module, the detection module, the first port and the neutral port connection, the control unit of the second module is connected to the detection module, the first port, the second port and the neutral port, the control unit of the third module is connected to the detection module, the first port port, the third port and the neutral port are connected, and the control unit of the first module, the control unit of the second module and the control unit of the third module are used to respectively confirm that the input AC power is the single-phase AC electric energy or the three-phase alternating current electric energy, and the control unit of the second module and the control unit of the third module respectively control the selectivity of the first auxiliary bridge arm and the second auxiliary bridge arm according to the confirmation result of the detection module to work or not to work. 17. The charging device of claim 1, wherein the control port further comprises a first detection port and a second detection port, and the first detection port or the second detection port is used to detect the current of the input alternating current size, and provide the detection module with the detected result by means of communication. 18 . The charging device of claim 1 , wherein the output power of the first module is 3.3 kW, the output power of the second module is 3.3 kW, and the output power of the third module is 3.3 kW. 19 . 19. A control method suitable for a charging device, wherein the charging device receives an input AC power generated by a charging device as a single-phase AC power for charging, the charging device comprises an input terminal, and the input terminal comprises a A first port and a neutral port, the charging device further includes a first module, a second module, and a third module connected with the first port and the neutral port, connected between the input end and the second module a first auxiliary bridge arm and a second auxiliary bridge arm connected between the input end and the third module, wherein the output ends of the first module, the second module and the third module are connected in parallel , wherein the control method includes the steps: (a) when the input terminal receives the input alternating current, controlling the operation of the first module; (b) judging whether the current of the input alternating current is less than or equal to a first current preset value, and if the current of the input alternating current is less than or equal to the first current preset value, execute step (c), otherwise execute step (d); (c) controlling the first auxiliary bridge arm and the second auxiliary bridge arm to not work, so that the second module and the third module do not operate; (d) judging whether the current of the input alternating current is greater than the first preset current value and less than or equal to a second preset current value, if the current of the input alternating current is greater than the first preset current value and less than or equal to the second current When the preset value is set, perform step (e), otherwise, perform step (f); (e) controlling the operation of the first auxiliary bridge arm and the operation of the second auxiliary bridge arm, causing the second module to operate in parallel with the first module and to convert the input alternating current, and to disable the third module; and (f) controlling the first auxiliary bridge arm and the second auxiliary bridge arm to operate, so that the second module, the third module and the first module operate in parallel and convert the input AC power. 20. The control method of claim 19, wherein the first module, the second module and the third module respectively have a first bridge arm and a second bridge arm, each of the first bridge arm and each The second bridge arm respectively includes two switch components, the first auxiliary bridge arm and the second auxiliary bridge arm respectively include two controllable switch components, and the first port is connected to the second port of the first module The midpoint of the two switch assemblies of the bridge arm, the midpoint of the two controllable switch assemblies of the first auxiliary bridge arm, and the midpoint of the two controllable switch assemblies of the second auxiliary bridge arm, the midline The port is connected to the midpoint of the two switch assemblies of the first bridge arm of the first module, the midpoint of the two switch assemblies of the first bridge arm of the second module and the first bridge arm of the third module The midpoint of the two switch assemblies of the bridge arm. 21. The control method of claim 20, wherein the two switch components of the first bridge arm of the first module, the two switch components of the first bridge arm of the second module, and the third The two switch components of the first bridge arm of the module are respectively a transistor, and the first module, the second module and the third module also have a capacitor and an inductor respectively, and each of the capacitors is respectively associated with a corresponding The first bridge arms are connected in parallel, one end of each of the inductors is respectively connected to the midpoint of the two transistors of the corresponding first bridge arm, and the other end of each of the inductors is respectively connected to the neutral port.

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