Vehicles and their energy conversion devices and power systems

Abstract

To provide a vehicle, an energy conversion device and a power system for performing motor drive and charging.SOLUTION: A power system of a vehicle and an energy conversion device comprise: a motor coil (11); a bridge converter (12); and a bidirectional bridge (13). The bridge converter is connected with the motor coil and the bidirectional bridge, the motor coil, the bridge converter and the bidirectional bridge are connected with an external charging port (10), the bridge converter and the bidirectional bridge are connected with an external battery (200), the motor coil, the bridge converter and the external charging port constitute a DC charging circuit, the motor coil, the bridge converter, the bidirectional bridge and the external charging port constitute an AC charging circuit, and the motor coil, the bridge converter and the external battery constitute a motor drive circuit. Thus, the energy conversion device can realize motor drive of the vehicle, and DC charging and AC charging of the battery with the same system and circuit.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] (CROSS REFERENCE TO RELATED APPLICATIONS) This application was filed on June 30, 2019 by BYD Company Limited. , Chinese patent application No. 201 This application claims priority to "Patent Application No. 910582154.9".

[0002] The present application belongs to the field of electronics technology, in particular, a vehicle and its energy conversion device and power system. Regarding MU. [Background technology]

[0003] With the development and rapid popularization of electric vehicles, the motor control and battery charging of electric vehicles are becoming more and more Currently, the motor drive and battery charging of conventional electric vehicles are separate, In other words, the motor drive circuit and the battery charging circuit are two independent and unrelated circuits. The motor drive circuit is used only for driving the motor and cannot be used for charging the battery. The battery charging circuit is used only for charging the battery and cannot be used for driving a motor.

[0004] However, the above method effectively ensures that the motor drive and battery charging of the vehicle are performed normally. However, in the above method, the motor driving circuit and the battery charging circuit are mutually exclusive. Since the above method is independent and unrelated to each other, the circuit is complicated, the integration level is low, and the volume is large. It's big and expensive.

[0005] In summary, the conventional technology has problems such as a complex circuit structure of the entire motor driving and charging system, low integration, large volume, and high cost. Patent Document 1 discloses a charging system for charging a vehicle. Patent Document 1 discloses a circuit that sequentially connects an inverter, a motor generator, and an external AC power supply (or DC power supply) to a power storage device. Patent Document 1 discloses that the circuit including the inverter, motor generator, etc. is used to drive a motor and perform AC charging (or DC charging). [Patent Document 1] JP 2010-51144 A Summary of the Invention [Problem to be solved by the invention]

[0006] The present application seeks to solve at least to some extent one of the technical problems in the related art.

[0007] The present application relates to a conventional motor drive and charging system that has a complicated overall structure and a high degree of integration. To solve the problems of low power consumption, large volume and high cost, The present invention aims to provide a power conversion device and a power system. [Means for solving the problem]

[0008] The present invention is realized as follows. The energy conversion device includes a motor coil, a bridge, and a a bidirectional bridge; The bridge converter is separately connected to the motor coil and the bidirectional bridge. , The motor coil, the bridge converter, and the bidirectional bridge are all externally connected. The bridge converter and the bidirectional bridge are both connected to a charging port. connected to the battery, The motor coil, the bridge converter, and the external charging port constitute a DC charging circuit. to charge the external battery, The motor coil, the bridge converter, the bidirectional bridge, and the external charging port forms an AC charging circuit to charge an external battery, The motor coil, the bridge converter, and the external battery constitute a motor drive circuit. do.

[0009] The present application provides a power system including the above energy conversion device and a control module. Another object of the present invention is to provide an energy conversion device comprising: a motor including a motor coil; a bridge converter connected to one end of the motor coil, a motor control module, the other end of which is connected to an external charging port; a bidirectional bridge, the bidirectional bridge being connected in parallel to the bridge converter; The first common connection terminal is connected to an external battery. the first common connection terminal is connected to the other end of the battery, and the second common connection terminal is connected to the other end of the battery, a vehicle-mounted charging module connected to the second common connection terminal and the bidirectional bridge; fruit, The control module includes a charging port, the motor coil, and the bridge converter. A DC charging circuit for an external battery, comprising: a charging port; the motor coil; and the bridge. A converter and an AC charging circuit for an external battery constituted by the bidirectional bridge, and the motor The motor drive circuit is configured with a coil, the bridge converter, and an external battery. The DC charging circuit, the AC charging circuit and the drive circuit are connected to the motor coil and Share the bridge converter.

[0010] Another object of the present application is to provide a vehicle including the above-mentioned power system.

[0011] In the present application, a driving and By using an energy conversion device having a charging function, the energy conversion device: It operates in drive mode, DC charging mode and AC charging mode, and uses the same system. This allows the vehicle to drive the motor and charge the battery, and in particular, the same circuit topology can be used. It can realize DC charging and AC charging, and has a high degree of component duplication and system integration. High density and simple structure reduce system cost and system volume The overall structure of the traditional motor drive and charging system is complicated, has low integration and is bulky. This solves the problem of large size and high cost.

[0012] Additional aspects and advantages of the present application are set forth in part in the description that follows and in part in the description that follows. These will become apparent in the specification or will be learned by practice of the present application. [Brief description of the drawings]

[0013] [Figure 1] 1 is a schematic diagram of a module structure of an energy conversion device according to a first embodiment of the present application. [Diagram 2] 1 is a schematic diagram of a circuit structure of an energy conversion device according to a first embodiment of the present application. [Diagram 3] FIG. 4 is a schematic diagram of a circuit structure of an energy conversion device according to a second embodiment of the present application. [Figure 4] FIG. 6 is a schematic diagram showing a module structure of an energy conversion device according to a second embodiment of the present invention. [Diagram 5] FIG. 11 is a schematic diagram of a module structure of an energy conversion device according to a third embodiment of the present application. [Figure 6] FIG. 11 is a schematic diagram of the circuit structure of an energy conversion device according to Example 3 of the present application. [Figure 7] FIG. 11 is a schematic diagram of another circuit structure of an energy conversion device according to Example 3 of the present application. [Figure 8] FIG. 11 is a schematic diagram of the circuit structure of an energy conversion device according to Example 4 of the present application. [Figure 9] FIG. 11 is a schematic diagram of a module structure of an energy conversion device according to a fifth embodiment of the present application. [Figure 10] 1 is a schematic diagram of the circuit structure of an energy conversion device according to Example 5 of the present application. [Figure 11] FIG. 11 is a schematic diagram of another circuit structure of an energy conversion device according to Example 5 of the present application. [Figure 12] FIG. 11 is a schematic diagram showing the module structure of an energy conversion device according to a sixth embodiment of the present application. [Figure 13] FIG. 11 is a schematic diagram of a module structure of an energy conversion device according to Example 7 of the present application. [Figure 14] FIG. 11 is a schematic diagram of the circuit structure of an energy conversion device according to Example 7 of the present application. [Figure 15] FIG. 13 is a schematic diagram of a module structure of an energy conversion device according to Example 8 of the present application. [Figure 16] FIG. 13 is a schematic diagram of a module structure of an energy conversion device according to Example 9 of the present application. [Figure 17] FIG. 13 is a schematic diagram of the circuit structure of an energy conversion device according to Example 9 of the present application. [Figure 18] FIG. 13 is a schematic diagram showing the operation timing of an energy conversion device according to Example 9 of the present application. [Figure 19] FIG. 16 is a schematic diagram of the module structure of a power system according to a tenth embodiment of the present invention. [Figure 20] FIG. 23 is a schematic diagram of a module structure of a power system according to an eleventh embodiment of the present invention. [Figure 21] FIG. 23 is a structural schematic diagram of a power system according to a twelfth embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the present embodiments, examples of which are illustrated in the drawings and referenced throughout. The same or similar reference numbers indicate the same or similar parts or parts having the same or similar functions. The embodiments described below with reference to the drawings are merely illustrative and should not be construed as limiting the scope of the present application. It is intended to be illustrative and not to be construed as limiting the present application.

[0015] Hereinafter, the implementation of the present invention will be described in detail with reference to specific drawings.

[0016] FIG. 1 shows a module structure of an energy conversion device according to a first embodiment of the present invention. For simplicity, only the parts relevant to this embodiment are shown and described in detail as follows.

[0017] As shown in FIG. 1, the energy conversion device according to the embodiment of the present application includes a motor coil 11, a brake It includes a ridge converter 12 and a bidirectional bridge 13 .

[0018] The bridge converter 12 is separately connected to the motor coil 11 and the bidirectional bridge 13. The motor coil 11, the bridge converter 12 and the bidirectional bridge 13 are all externally connected. A bridge converter 12 and a bidirectional bridge 13 are connected to the charging port 10. is also connected to the external battery 200, Specifically, the motor coil 11, the bridge converter 12, and the external charging port 10 are A DC charging circuit is configured to charge the external battery 200, A motor coil 11, a bridge converter 12, a bidirectional bridge 13, and an external charging port 10 constitutes an AC charging circuit to charge an external battery 200; The motor coil 11, the bridge converter 12, and the external battery 200 constitute a motor drive circuit. Configure.

[0019] In a specific embodiment, when the energy conversion device is used for DC charging or AC charging, In this case, the energy conversion device is connected to an external DC or AC power source via a charging port 10. The DC power source may be obtained after an external AC power source is rectified through a charging port. The charging port may be a charging port that is connected to the power supply. The AC power source may be an external DC power source that is converted inversely through a charging port. The AC current may be an AC current acquired from an external AC power source via a charging port. It may be a current, and no specific limitation is placed here.

[0020] In particular, when the energy conversion device is operated in the above-mentioned driving mode, DC charging mode, Not only can it operate in DC power supply and AC charging mode, but it can also operate in DC discharge mode, AC discharge mode, The energy conversion device can then be operated in various modes, such as discharge mode, emergency mode, etc. The operation mode will be described in detail later, and the description will be omitted here.

[0021] In this application, the "external battery" and "external charging port" described in this embodiment are The vehicle is located "externally" to the energy conversion device and is provided with the energy conversion device. It is not about being "outside".

[0022] In this embodiment, a drive circuit including a motor coil, a bridge converter and a bidirectional bridge is provided. By using an energy conversion device having a driving and charging function, the energy conversion device The system operates in drive mode, DC charging mode and AC charging mode, and the same system The vehicle motor can be driven and the battery can be charged using the same. A bridge converter is used for DC charging, and the motor coil, bridge converter and bidirectional The bridge is used for AC charging, and the motor coil and bridge converter are used for motor drive. This allows for a high degree of component redundancy, high system integration, and simple structure. This reduces system costs and reduces the system volume, and is a step ahead of conventional motor drives. The overall structure of the charging system is complicated, has low integration, is large in volume, and is expensive. to resolve the issue.

[0023] In addition, the difference in charging power between conventional AC charging systems and DC charging systems is large. Therefore, the difference in circuit topology between the two charging systems is large, and the two systems are generally independent. The degree of multiplexing is low, and the versatility of the energy conversion device disclosed in the present application is high; For a DC or AC charging station, the energy conversion device: Both can be charged, reducing system costs and reducing the system volume, and eliminating the need for conventional AC charging. Solves the problem of the complex structure of the power supply system and the DC charging system as a whole and low degree of multiplexing. Decide.

[0024] In another embodiment of the present application, the bridge converter 12 can achieve bidirectional conversion. When the energy conversion device operates in the drive mode, the bridge converter 12 It functions as a phase inverter and acts as a motor controller. Energy Conversion When the device is operated in an AC charging mode, the bridge converter 12 provides rectification and power correction. When the energy converter operates in DC charging mode, The motor 12 performs a DC boost function.

[0025] In the related art, it is necessary to use an AC charging module to realize AC charging. In order to realize DC charging, a DC charging module must be used, and the motor drive must be realized. However, it is necessary to use an inverter module to achieve these three functions in one module. Due to lack of related technology for integration into modules, the circuit structure is complicated, the integration level is low, and the volume is large. The present application creatively integrates these three functions into the same circuit, ,Realize the function multiplexing of multiple components, and after function integration, DC charging module, AC charging Compared to separate products where the module and inverter module are independent from each other, In another embodiment of the present application, the motor coil 11, the bridge converter 12, the bidirectional bridge In the motor drive circuit, the motor coil 11 is The bridge converter 12 serves to generate an induced electromotive force after the three-phase inverter is energized. In the AC charging circuit, the motor coil 11 serves to realize the inverter function. C acts as an inductor in the circuit, and the bridge converter 12 acts as a P The bidirectional bridge 13 serves to function as a pair of bridges in the FC circuit. It acts as another set of bridges in the PFC circuit and in the DC charging circuit. Thus, the motor coil 11 functions as a boost inductor in the boosted DC while the circuit The bridge converter 12 serves to reduce the ripple in the boost DC It serves as a bridge between the two.

[0026] In addition, in the conventional technology, the AC charging system and the DC charging system are provided independently. The two systems are large in volume and expensive due to the low degree of multiplexing. The energy conversion device of the present invention not only realizes an AC charging function but also realizes a DC charging function. This allows multiplexing of functions, i.e., the motor coil and bridge converter of the present invention can be Both of these devices are involved in AC and DC charging, realizing component duplication and further function duplication. In addition, due to the multiplexing of parts, the structure of the conventional technology is complicated, the degree of multiplexing is low, and the cost is high. This solves the problem of large volume and low cost.

[0027] In another embodiment of the present application, a general household outlet is used for AC charging, The AC power supply is generally 7 kilowatts (kW), and DC charging is generally done using a dedicated charger. A power stand is used, the power of which is generally 60kW to 150kW, and 100kW or more The trend is for high-speed DC charging stations to be developed, and the power required for motor operation is generally 10 0kW, as can be seen from the above explanation, the vehicle is motor-driven, DC-charged, and The power level difference between the three types of AC charging situations is large, and the power difference is due to the switching transistor. This is very important for the selection of the

[0028] For switch transistors, high-power switch transistors are low-power Since the energy conversion device is more expensive than the switch transistor, it is Consider the different power required when operating in current charging mode and alternating current charging mode. The type of switch transistor in the bridge converter 12 is a bidirectional bridge. Different types of switch transistors in 13, i.e. bidirectional bridge 13 and The bridge converter 12 uses switch transistors of different power levels to In one embodiment, the power level of the switch transistors used by the bridge converter 12 is greater than the power level of the switch transistors used by the bidirectional bridge 13. For example, with the same type of switch transistor, the bridge converter 12 can handle high current The bidirectional bridge 13 uses low current level MOSFET switch transistors. A MOSFET switch transistor may be used, or a different type of switch may be used, e.g. In the case of the switch transistor, the bridge converter 12 is a high power IGBT switch transistor. The bidirectional bridge 13 uses low-power MOSFET switch transistors. Specifically, in this embodiment, a high-power battery such as a DC charger and a motor drive is used. In both modes, the bridge converter 12 is used. The inverter 12 may be implemented using high power IGBT switch transistors or The bidirectional bridge is realized using high current level MOSFET switch transistors. Since the 13 mainly operates during AC charging, it can be realized by using a low-power MOSFET. Thus, it is possible to ensure effective operation of the energy conversion device while at the same time reducing the circuit cost. It can be reduced.

[0029] On the other hand, during AC charging, the switching frequency required for the bidirectional bridge 13 is high (for example, 60kHz), which allows for the use of highly efficient MOSFET switch transistors when realizing high frequency operation. A bridge capacitor or silicon carbide MOSFET switch transistor must be used. Since the inverter 121 has a three-phase bridge and its operation method is three-phase interleave control, Therefore, the required frequency of the switch transistors of the bridge converter 12 is low, The type of switch transistor in the buck converter 12 and the type of switch transistor in the bidirectional bridge 13 are The types of switch transistors used are different. For example, The type of switch transistor is an IGBT switch transistor, which is highly efficient at low frequency operation. It is.

[0030] In addition, when the energy conversion device operates in an AC charging mode or a DC charging mode, The three-phase interleaved control operation method used by the edge converter 12 is When charging, the DC side ripple can be reduced and the charging efficiency can be increased. .

[0031] When the energy conversion device in this application is used for AC / DC charging performance testing, the inventors Improve the overall inductance of the energy conversion device to improve charging efficiency. By studying the motor structure, the inductance of the motor coil is reduced. We found that one possible way to do this is to improve

[0032] As one embodiment of the present application, as shown in FIG. 2, the three-phase winding of the motor coil 11 is Each of the phase windings includes N coil branch circuits, and the N coil branch circuits in each phase winding include a first The two ends are connected to a bridge converter 12 after being connected to a common, and the second end is connected to the other two phase windings. The N coil branch circuits are connected to the second ends of the N coil branch circuits in a one-to-one correspondence to form N neutral points. The charging port 10 is connected to M neutral points, where N is an integer greater than 1. and preferably 4, and M is a positive integer smaller than N.

[0033] Specifically, in FIG. 2, for example, the value of M is 2 and the value of N is 4. , the specific structure of the motor coil 11 of the present application, i.e., two neutral points out of four neutral points The point is connected to the charging port 10. In this embodiment, the value of N is The number of coil branch circuits included in each phase winding of the motor coil 11 is 4, for example. However, the number of coil branch circuits is not limited to a specific number.

[0034] The three-phase windings of the motor coil 11 will now be described in detail with reference to a specific example.

[0035] Specifically, as shown in FIG. 2, each of the motor coils 11 includes N coil branch circuits. The windings include a U-phase winding, a V-phase winding, and a W-phase winding.

[0036] As shown in FIG. 2, the first ends of the N coil branch circuits in the U-phase winding are commonly connected. After that, the first phase bridge of the bridge converter 12 is connected to the N After the first ends of the coil branch circuits are connected together, the second phase bridge of the bridge converter 12 is The first ends of the N coil branch circuits in the W-phase winding are connected to a common 1, the third bridge of the bridge converter 12 is connected to the U-phase winding, the V-phase winding and the W-phase winding. The second ends of the N coil branch circuits of each phase winding in the winding are connected to the N coil branch circuits of the other two phase windings. N neutral points N1, N2, N3 are connected in one-to-one correspondence to the second ends of the coil branch circuits. . . N, the N neutral points may be directly connected to the charging port 10, etc. In this embodiment, N neutral points may be connected to the charging port 10 by a connection circuit. First, the M neutral points are directly connected to the charging port 10. The following circuits will be described in detail later, and their description will be omitted here.

[0037] In contrast to the case where all the neutral points of the motor coils are connected to the charging port, this embodiment In the example, some of the neutral points are connected to the charging port, , and the equivalent inductance of the motor coil is increased, and the overall By increasing the effective inductance, the charging efficiency is improved.

[0038] In another embodiment, the inventors consider charging power and charging efficiency factors comprehensively to determine the charging The power is positively correlated with the overcurrent capability of the motor coil, and the more motor coils connected in parallel, the The overcurrent capability is strong, and the charging efficiency is negatively correlated with the inductance of the motor coil. Regarding the inductance of the motor coil, the fewer the number of motor coils connected in parallel, the larger the inductance of the motor coil. In this embodiment, each phase winding is a motor coil including N coil branch circuits. By using the motor coil 11, the energy conversion device By changing the value, DC or AC charging with different power can be realized, and the energy To achieve the purpose of adjusting the charging power of the energy conversion device by the inductance value. It is possible.

[0039] As one embodiment of the present application, as shown in FIG. 3, the energy conversion device includes a motor A neutral point control circuit controls the connection between M neutral points of the N neutral points of the coil 11 and the charging port 10. It further includes a dot switch 130 .

[0040] In a specific implementation, the neutral switch 130 is implemented using N single-pole, single-throw switches. This can be realized by using multiple single pole double throw switches. If switch 130 is implemented using N single-pole, single-throw switches, The first ends of the switches are connected to the N neutral points of the motor coils 11 in one-to-one correspondence, and the second ends of the switches are connected to the N neutral points of the motor coils 11 in one-to-one correspondence. The two ends are connected to the charging port 10. The neutral switch 130 is a single-pole double-throw switch. When the single-pole double-throw switch is used, the movable ends of the single-pole double-throw switches are all connected to the charging port. 10, and the two fixed ends of each single-pole double-throw switch are connected to the motor coil 11 as required. The neutral point switch 130 is further connected to two of the neutral points in a one-to-one correspondence. In particular, this can be achieved using a single-pole, multi-throw switch, which has a movable end that is The fixed ends are connected to the neutral point of the motor coil 11 as required. are connected in a one-to-one correspondence to

[0041] In this embodiment, a neutral switch 130 is added to the energy conversion device. By selectively turning on and off the neutral switch 130, the neutral switch 130 is connected to the charging port 10. Among the N neutral points of the motor coil 11, M neutral points are connected, and the energy conversion The switching device turns the switch at the neutral switch 130 on or off as needed. By doing so, different numbers of coil branch circuits can be selected from the three-phase windings of the motor coil 11. This helps to realize the adjustment of charging power.

[0042] As one embodiment of the present application, as shown in FIG. 4, the energy conversion device is a switch motor. It also contains Joule 14.

[0043] The switch module 14 has one end connected to the charging port 10 and the other end connected to a separate motor The switch module 11 is connected to the bridge converter 12 and the bidirectional bridge 13. The controller 14 switches between a driving mode, a DC charging mode, and an AC charging mode.

[0044] In this embodiment, by adding a switch module 14 to the energy conversion device, The switch module 14 switches the energy conversion device between a driving mode, a DC charging mode, and and AC charging modes, so that the energy conversion device can accurately select the mode. This effectively prevents breakdowns caused by the inability to switch between energy sources. Improves the reliability of the switching device.

[0045] In one embodiment of the present application, as shown in FIG. 5, the charging port 10 is a DC charging port. 101 and an AC charging port 102. The switch module 14 is a first switch unit. The switch unit 141 includes a first switch unit 142 .

[0046] DC charging port 101, first switch unit 141, motor coil 11, bridge The converter 12 constitutes a DC charging circuit for the battery 200, and includes an AC charging port 102, A second switch unit 142, a motor coil 11, a bridge converter 12, a bidirectional bridge The ridge 13 forms an AC charging circuit for the battery 200. In the discharge mode, the DC charging port A first switch unit 141, a motor coil 11, a bridge converter 1 2 constitutes a DC discharge circuit for the battery 200, and includes an AC charging port 102, a second switch The switch unit 142, the motor coil 11, the bridge converter 12, and the bidirectional bridge 13 are , an AC discharge circuit is formed for the battery 200.

[0047] In this embodiment, a charging port is configured with a DC charging port 101 and an AC charging port 102. Port 10, a first switch unit 141, and a second switch unit 142 By using the switch module 14, the energy conversion device can be When the battery operates in a charging mode or an AC charging mode, the battery has a charging circuit corresponding to the different modes, and Furthermore, there is no interference between the DC charging circuit and the AC charging circuit, making the circuit highly reliable and stable. expensive.

[0048] In one embodiment of the present application, as shown in FIG. 6, the first switch unit 141 includes: The switch includes a first switch K1 and a second switch K2. The first switch K1 has one end connected to a DC One end is connected to the charging port 101, the other end is connected to the motor coil 11, and the second switch K2 One end of the converter is connected to the DC charging port 101, and the other end is connected to the bridge converter 12. The second switch unit 142 includes a third switch K3 and a fourth switch K4. The third switch K3 has one end connected to the AC charging port 102 and the other end connected to the motor coil 11, and the fourth switch K4 has one end connected to the AC charging port 102 and the other end is connected to the two-way bridge 13, specifically, to the midpoint of the two-way bridge 13. .

[0049] Specifically, referring again to FIG. 6, in this embodiment, in the specific implementation, the first step The first switch K1, the second switch K2, the third switch K3 and the fourth switch K4 are This is also realized using single-pole, single-throw switches, with the first end of the first switch K1 and the second switch K2 connected to each other. The first end of the first switch K1 is connected to the DC charging port 101. The second end of the second switch K2 is connected to the neutral point of the motor coil 11, and the second end of the second switch K3 is connected to the bridge. Similarly, the first end of the third switch K3 and the negative side of the fourth The first end of the switch K4 is connected to the AC charging port 102, and the third switch K The second end of the fourth switch K3 is connected to the neutral point of the motor coil 11, and the second end of the fourth switch K4 is It is connected to the midpoint of the two-way bridge 13 .

[0050] In a specific embodiment, when the energy conversion device operates in a driving mode, the first switch The first switch K1, the second switch K2, the third switch K3 and the fourth switch K4 are At this time, the battery 200, the bridge converter 12 and the motor coil 11 are a first switch driving circuit configured to drive the first power supply when the energy conversion device operates in a DC charging mode; The first switch K1 and the second switch K2 are closed, and the third switch K3 and the fourth switch K 4 is opened, and at this time, the DC charging port 101, the first switch K1, the second switch K2 The motor coil 11, the bridge converter 12 and the battery 200 constitute a DC charging circuit. When the energy conversion device operates in an AC charging mode, the third switch K3 and the fourth switch K4 are The switch K4 is closed, and the first switch K1 and the second switch K2 are open. a third switch K3, a fourth switch K4, a motor coil 11 The bridge converter 12, the bidirectional bridge 13 and the battery 200 constitute an AC charging circuit. In the discharge mode, the DC charging port 101, the first switch K1, and the second switch K 2. The motor coil 11 and the bridge converter 12 form a DC discharge circuit for the battery 200. The AC charging port 102, the third switch K3, the fourth switch K4, the motor coil The filter 11, the bridge converter 12, and the bidirectional bridge 13 are connected to the battery 200 for AC discharge. Compose a circuit.

[0051] In one embodiment of the present application, as shown in FIG. 7, the charging port 10 is an AC / DC charging The switch module 14 includes a third switch unit 143 and a second switch unit 144. The third switch unit 143 includes a first switch unit 144 and a second switch unit 144. The third switch unit 143 includes a The fourth switch unit is connected to the current charging port 103 and the other end is connected to the motor coil 11. One end of the unit 144 is connected to the AC / DC charging port 103, and the other end is connected to a bridge converter. The input / output terminal 12 is connected to a bidirectional bridge 13 .

[0052] In particular, the third switch unit 143 is a first terminal for AC / DC charging; The fourth switch is connected to the port 103, the second end is connected to the neutral point of the motor coil 11, The switch unit 144 has one end connected to the AC / DC charging port 103 and the other end connected to the bridge It is selectively connected to the negative side of converter 12 or to the midpoint of bidirectional bridge 13 .

[0053] When the fourth switch unit 144 is connected to the bridge converter 12, the AC / DC current charging port 103, a third switch unit 143, a fourth switch unit 144, The motor coil 11, the bridge converter 12 and the battery 200 are connected to a DC charging circuit or a DC discharging circuit. When the fourth switch unit 144 is connected to the bidirectional bridge 13, , AC / DC charging port 103, third switch unit 143, fourth switch unit The motor coil 11, the bridge converter 12, and the bidirectional bridge 13 are connected to the battery. For this purpose, an AC charging circuit or an AC discharging circuit is configured.

[0054] In this embodiment, the charging port 10 is composed of an AC / DC charging port 103 and a third A switch module including a first switch unit 143 and a fourth switch unit 144. By using the module 14, the energy conversion device can be charged in either DC or AC mode. When operating in this mode, the external AC or DC power source must be connected to the AC / DC charging port. 10, charging energy can be supplied to the energy conversion device, and the fourth switch The switch unit 144 allows the energy conversion device to have a DC charging circuit that supports different modes. Or, it has an AC charging circuit, and the DC charging circuit and the AC charging circuit do not interfere with each other, The circuit has high reliability, high stability, and high circuit integration.

[0055] In one embodiment of the present application, as shown in FIG. 7, the third switch unit 143 is One end is connected to the AC / DC charging port 103, and the other end is connected to the neutral point of the motor coil 11. The fourth switch unit 144 includes a fifth switch K5 connected to a movable end and A single-pole double-throw switch K6 includes two fixed ends, the movable end of which is connected to an AC / DC charging port 10. 3, one fixed end is connected to the bridge converter 12, and the other fixed end is The fourth switch unit 144 is connected to the midpoint of the two-way bridge 13. One switch is connected to the AC / DC charging port 103 at one end. , the other end is connected to the bridge converter 12, and another switch has one end connected to the AC / DC The other end is connected to the charging port 103 and the other end is connected to the bidirectional bridge 13 .

[0056] In addition, in FIG. 7, the fourth switch unit 144 is realized by using a single-pole double-throw switch K6. The fourth switch unit 144 includes two single-pole, single-throw switches. When the first terminal of each of the two single-pole single-throw switches is an AC / DC charging port, and the second end of the first single-pole, single-throw switch is connected to the negative side of the bridge converter 12. and a second end of the second single-pole single-throw switch is connected to the midpoint of the bidirectional bridge 13. can be.

[0057] In addition, in a specific implementation, when the energy conversion device operates in a driving mode, the fifth The switch and the single-pole double-throw switch are both open. At this time, the battery 200, the bridge capacitor The inverter 12 and the motor coil 11 constitute a motor drive circuit, and the energy conversion device When operating in DC charging mode, the fifth switch is closed and the third switch of the single-pole double-throw switch K6 is 1 fixed end is closed, at this time AC / DC charging port 103, the fifth switch, single pole double The throw switch K6, the motor coil 11, the bridge converter 12 and the battery 200 are connected to each other in a direct current charging circuit. When the energy conversion device is operated in an AC charging mode, a fifth switch is closed, and the second fixed end of the single-pole double-throw switch is closed. At this time, the AC / DC charging port switch 103, fifth switch, single pole double throw switch K6, motor coil 11, bridge converter The motor 12, the bidirectional bridge 13 and the battery 200 form an AC charging circuit.

[0058] In this embodiment, the switch K5 and the single-pole double-throw switch K6 are used to The first switch K1 to the fourth switch K2 in the other embodiments are the same as the first switch K2 to the fourth switch K3 in the other embodiments. It can replace the switch K4, and can also be used to select the drive mode, DC charging mode and AC charging mode. The electronic components used in the switch module 14 to realize switching between the three modes are By reducing the number of electronic components in the energy conversion device, the number of This reduces the cost of the conversion device and at the same time makes the circuit configuration simpler.

[0059] In one embodiment of the present application, as shown in FIG. 8, the energy conversion device is a bidirectional brake. The first capacitor C1 is connected in parallel to the ridge 13. 1 also realizes function multiplexing, and the AC charging circuit, the DC charging circuit and the motor of the energy conversion device The motor drive circuits all share the first capacitor C1. Specifically, , the bridge converter 12, the first capacitor C1 and the external charging port form a DC charging circuit The external battery is charged by configuring the motor coil 11, the bridge converter 12, the bidirectional bridge The offset 13, the first capacitor C1, and the external charging port constitute an AC charging circuit to supply an external power The battery is charged, and the motor coil 11, the bridge converter 12, the first capacitor C1 and the The external battery and the first capacitor form a motor drive circuit, and the multiplexing of the first capacitor reduces the power consumption during DC charging. Not only does it improve the conversion efficiency and energy utilization rate of electric energy, but it also reduces the power consumption during AC charging. It reduces noise caused by harmonic currents on the power grid and their impact on the power grid, and is a power supply component for the power grid. It improves the quality and absorbs high frequency switching frequency and harmonics generated by inverse conversion during driving. This improves the energy storage performance after reverse conversion and boosting, and the bridge converter is stable and pure It can ensure a clean DC bus voltage, high component duplication, and energy saving. The energy conversion device has a high integration density and a simple structure, which reduces the This reduces the cost and reduces the volume of the energy conversion device.

[0060] Specifically, as shown in FIG. 8, the first capacitor C1 is connected to the bridge converter 12 and and connected in parallel to a bidirectional bridge 13 .

[0061] Specifically, when the energy conversion device is operated in a DC charging mode or an AC charging mode, In operation, the first capacitor C1 is connected to the battery 200 during a DC or AC charging process. In the above, the bridge converter 12 or the bridge converter 12 and the bidirectional bridge 13 In addition to filtering the voltage output from the bridge converter 12 or Energy is stored based on the voltage output from the inverter 12 and the bidirectional bridge 13. This allows DC or AC charging of the battery 200 to be completed.

[0062] In this embodiment, by providing a first capacitor C1 in the energy conversion device, The first capacitor C1 is connected to the bridge converter 12 or the bridge converter 12 and the In addition to filtering the voltage output from the directional bridge 13, Based on the voltage output from the converter 12 or the bridge converter 12 and the bidirectional bridge 13, By storing energy in the battery 200, DC or AC charging of the battery 200 can be completed. This ensures the normal charging function of the energy conversion device and also reduces other clutter. It can ensure that the capacitor C1 does not interfere with the charging process, and the first capacitor C1 When the energy converter operates in motor drive mode, the capacitor of the motor controller Thus, the first capacitor C1 is used as a PFC capacitor. Not only are they used as capacitors in motor controllers, but they are also multiplexed in energy conversion equipment. Improve the utilization rate of electronic components in the equipment while simplifying the structure of the energy conversion device. do.

[0063] In one embodiment of the present application, as shown in FIG. 9, the switch module has one end connected to the battery. 200, and the other end is separately connected to the bridge converter 12 and the bidirectional bridge 13. The fifth switch unit 145 is further included.

[0064] In this embodiment, a fifth switch unit 145 is added to the switch module. As a result, the battery 200 is connected to the bridge converter 1 through the fifth switch unit 145. 2 and a bidirectional bridge 13, and the energy conversion device is a front-end A fault occurs in the circuit (e.g., the switch module 14, the motor coil 11, the bridge When a fault occurs in either the converter 12 or the bidirectional bridge 13, the fifth switch The method of controlling the switch unit 145 can avoid damage to the battery 200, Improve the service life of pond 200.

[0065] In one embodiment of the present application, as shown in FIG. 10, the fifth switch unit 145 is , a switch K7 and a switch K8. A first end of the switch K7 is connected to the positive terminal of the battery 200. the first end of switch K8 is connected to the negative terminal of battery 200, and the second end of switch K7 is connected to the negative terminal of battery 200. The terminals of the switch are connected to the positive terminal of the bridge converter 12 and the positive terminal of the bidirectional bridge 13. The second end of the switch K8 is connected to the negative side of the bridge converter 12 and the negative side of the bidirectional bridge 13. will be done.

[0066] In one embodiment of the present application, as shown in FIG. 12, the energy conversion device is a bidirectional The switch module 14 further includes a DC module 15. 146, and the bidirectional DC module 15 includes a first DC end and a second DC end. The first DC terminal is connected to the bidirectional bridge 13, and the second DC terminal is connected to the sixth switch unit 14. The other end of the sixth switch unit 146 is connected to the battery 200. To be continued.

[0067] In this embodiment, a sixth switch unit 146 is added to the switch module 14. By adding a bidirectional DC module 15 to the energy conversion device, the bidirectional DC Module 15, sixth switch unit 146, charging port in energy conversion device The motor coil 10, the motor coil 11 and the bidirectional DC module 15 are connected to a separate AC or DC charging circuit. The energy conversion device is configured to have a wide range of AC / DC charging modes, and the energy conversion device When performing DC charging, not only insulated DC charging but also non-insulated DC charging is possible. Furthermore, the charging method for the energy conversion device has ample space, and the exchange of the energy conversion device is possible. Improves safety during the current charging process.

[0068] In one embodiment of the present application, as shown in FIG. 14, the sixth switch unit 146 is , switch K9 and switch K10. The first end of switch K9 is connected to the positive terminal of battery 200. , the first end of switch K10 is connected to the negative terminal of battery 200, and the second end of switch K9 is connected to the negative terminal of battery 200. The second end is connected to the second DC end of the bidirectional DC module 15, and the second The end of the DC input is connected to the second DC end of the bi-directional DC module 15.

[0069] In one embodiment of the present application, as shown in FIG. 12, a bidirectional DC module 15 is It further includes a third DC end connected to a battery or an on-board discharge port.

[0070] In this embodiment, by using a bidirectional DC module 15 including a third DC end The bidirectional DC module 15 is connected to the storage battery and the vehicle discharge port through a third DC terminal. The energy conversion device can be connected to a storage battery. The vehicle can be used to drive a motor or to supply power to an external device using the on-board discharge port. This can enrich the operation modes of the energy conversion device, and the energy conversion Improve the coverage of the switching device.

[0071] In addition, in the embodiment of the present application, the bidirectional DC module 15 is used to charge the battery. It can also charge the storage battery and discharge it to the load inside the vehicle for emergency driving, etc. i.e., the bidirectional DC module can be used in different operating modes of the energy conversion device. 15, eliminating the need to increase different circuits for different operating modes, and The complexity and cost of the conversion device is reduced.

[0072] In one embodiment of the present application, as shown in FIG. 13, a bidirectional DC module 15 includes: A first converter 151, a second converter 152, a third converter 153 and a transformer unit The transformer unit 154 includes a primary side, a first secondary side, and a second secondary side. The first converter 151, the second converter 152, and the third converter 153 are connected to the first converter 151, the second converter 152, and the third converter 153. That is, the primary side of the transformer unit 154 is connected to the first converter 151, The first secondary side of the unit 154 is connected to the second converter 152, and the transformer unit 15 The second secondary side of the 4 is connected to the third converter 153, and the first converter 151 is connected to both a first converter 152 connected in parallel to the battery 200; A third converter 153 is connected in parallel to the storage battery or the on-board discharge port.

[0073] In this embodiment, a first converter 151, a second converter 152, a third converter By using a bidirectional DC module 15 including a motor 153 and a transformer unit 154, When the energy conversion device is in operation, the charging port 10, the motor coil 11, the bridge Converter 12, bidirectional bridge 13, first converter 151, transformer unit 154, The second converter 152, the sixth switch unit 146 and the battery 200 generate another AC Or by configuring a DC charging circuit, other AC or DC charging can be realized; A charging port 10, a motor coil 11, a bridge converter 12, a bidirectional bridge 13, The first converter 151, the transformer unit 154, the third converter 153, and the battery or the vehicle-mounted The discharge port can be used to provide additional power by configuring a battery charging circuit or an on-board discharge port circuit. The AC charging circuit and the battery charging circuit or the vehicle discharge port circuit do not interfere with each other when they are operating. Improves circuit reliability.

[0074] As one embodiment of the present application, as shown in FIG. 13, the third converter 153 is A first sub-converter 153a and a second sub-converter 153b connected to the second secondary side of the transformer unit 154 are also connected to the first sub-converter 153a and The second sub-converter 153b is included.

[0075] Specifically, the operation method of the third converter 153 is the same as that of the first sub-converter 153a and A first state in which the first sub-converter 153b and the second sub-converter 153b operate simultaneously, and a second state in which the first sub-converter 153b and the second sub-converter 153b operate simultaneously. and a second state in which the first sub-converter 153a and the second sub-converter 153b perform switching operations. That is, when the third converter 153 operates, the first sub-converter 15 3a is used as the sole converter, or the second sub-converter 153b is used as the sole converter. or a first sub-converter 153a and a second sub-converter The third converter 153 functions as a converter by simultaneously operating the third converter 153b. Add.

[0076] In this embodiment, the first sub-converter 153a and the second sub-converter 153b When the energy conversion device operates by implementing the third converter 153 by In this case, either the first sub-converter 153a or the second sub-converter 153b is Any of them can function as the third converter 153 and can also function as the first sub-converter If a failure occurs in either the first sub-converter 153a or the second sub-converter 153b, None of the converters are affected, and the first sub-converter 153a and the second sub-converter When the converter 153b simultaneously functions as the third converter 153, This can improve the rectification capability of the motor 153.

[0077] As one embodiment of the present application, as shown in FIG. The switch includes switch units Q3, Q4, Q5 and Q6, an inductor L2 and a capacitor C2. The switch units Q3, Q4, Q5 and Q6 form a full-bridge rectifier circuit. The input terminal of the switch unit Q3 is connected to the input terminal of the switch unit Q5. The first DC end of the switch unit Q4 is connected to the output end of the switch unit Q5. The output terminals of the 6 are commonly connected to form a first DC terminal of the bidirectional DC module 15, and the switch The output terminal of the switch unit Q3 is connected to the input terminal of the switch unit Q4 and the first terminal of the capacitor C2. a second end of the capacitor C2 connected to the primary side of the transformer unit 154; The output terminal of the switch unit Q5 is connected to the input terminal of the switch unit Q6 and the first terminal of the inductor L2. a second end of the inductor L1 connected to the primary side of the transformer unit 154; and a second end of the inductor L2 connected to the primary side of the transformer unit 154.

[0078] In one embodiment of the present application, as shown in FIG. The input transistors include switch units Q7, Q8, Q9 and Q10, inductor L3 and capacitor C3. The switch units Q7, Q8, Q9 and Q10 form a full-bridge rectifier circuit. The input terminal of switch unit Q7 and the input terminal of switch unit Q9 are connected in common to form a bidirectional DC motor. The second DC end of the switch unit Q15 is connected to the output end of the switch unit Q8. The output terminals of Q10 are connected in common to form the second DC terminal of the bidirectional DC module 15; The output terminal of the switch unit Q7 is connected to the input terminal of the switch unit Q8 and the first terminal of the capacitor C3. a first end of the capacitor C3 connected to the first secondary side of the transformer unit 154; The output terminal of the switch unit Q9 is connected to the input terminal of the switch unit Q10 and the inductor a first end of the inductor L3 is connected to the first terminal of the transformer unit 154; Connected to the secondary side.

[0079] In another embodiment of the present application, the energy conversion device has a first connection end and a second connection end. The first connection end is connected to the DC charging port 101 at one end. The other end is connected to the motor coil 11 and the bridge converter 12, and the second connection end is One end is connected to the AC charging port 102, and the other end is connected to the motor coil 11 and the bidirectional bridge 1 3 is connected.

[0080] In another embodiment of the present application, the energy conversion device includes a first energy connection end and a second energy connection end. The first energy connection terminal further includes an energy storage terminal group including the energy connection terminals , one end is connected to the battery, the other end is connected to the bridge converter 12, and the second connection end is One end is connected to the battery 200 and the other end is connected to the bidirectional DC module 15 .

[0081] As an embodiment of the present application, as shown in FIG. 14, the first sub-converter 153a is The second sub-converter 153b includes switch units Q11 and Q12. Switch units Q11, Q12, Q13 and Q1 4 are connected to the second secondary side of the transformer unit 154, and the switch unit The output terminals of Q11, Q12, Q13 and Q14 are commonly grounded.

[0082] In the embodiment of the present application, the multiple switch units included in the bidirectional DC module 15 A unit is a device in which diodes are connected in parallel and can perform switching operations, e.g. Power transistors, Metal-Oxid Semiconductor Field Effect Transistors e-Semiconductor Field-Effect Transistor, MOSFET, Insulated Gate Bipolar Transistor Bipolar Transistor (IGBT) and other switching devices are used. This can be achieved.

[0083] In one embodiment of the present application, as shown in FIG. 14, the transformer unit 154 includes a transformer T 1, the transformer T1 having a primary side which is the primary side of the transformer unit 154 and a first secondary side is the first secondary side of the transformer unit 154, and the second secondary side is the second secondary side of the transformer unit 154. the second secondary side constitutes the third DC end of the bidirectional DC module 15. .

[0084] As one embodiment of the present application, as shown in FIG. 14, the energy conversion device has one end charged. A voltage inductor L1 is connected to the power supply port 10 at one end and to the motor coil 11 at the other end. Including etc.

[0085] Specifically, as an embodiment of the present invention, as shown in FIG. 14, an inductor L1 has a first terminal is connected to the second end of the switch K1 and the second end of the switch K3, and the second end of the switch K4 is connected to the motor The inverter 11 is connected to the neutral point of the three-phase winding of the inverter 11.

[0086] Specifically, in the DC charging mode, the charging port 10, the inductor L1, the motor coil 11 The bridge converter 12 constitutes a DC charging circuit for the battery 200. In AC charging mode, charging port 10, inductor L1, motor coil 11, bridge capacitor The inverter 12 and the bidirectional bridge 13 form an AC charging circuit for the battery 200 .

[0087] In this embodiment, when the energy conversion device operates in AC charging mode, the inductor L 1 cooperates with a bidirectional bridge 13 to convert the AC current received by the charging port 10 into After converting the current into a target voltage, the battery 200 is charged with an alternating current. During the charging process of battery 0, if it is necessary to output an ideal voltage to charge battery 200, The output voltage during the charging process is controlled by the combination of inductor L1 and bidirectional bridge 13. It can be adjusted to ensure the voltage conversion function of the energy conversion device.

[0088] In one embodiment of the present application, as shown in FIG. 16, a bidirectional DC module 15 includes: The first DC / DC conversion circuit 155 and the second DC / DC conversion circuit 156 are included.

[0089] The first DC / DC conversion circuit 155 has one end connected to the bidirectional bridge 13 and the other end connected to the first 6 switch unit 146, The second DC / DC conversion circuit 156 has one end connected to the bidirectional bridge 13 and the other end connected to the storage Connected to a battery.

[0090] In this embodiment, the first DC / DC conversion circuit 155 and the second DC / DC conversion circuit 1 By using the bidirectional DC module 15 including 56, the bidirectional DC module 15 is connected to the battery 200 by a first DC / DC conversion circuit 155 and The energy converter is connected to the battery by a conversion circuit 156, and the energy converter is supplied with The energy generated can be used to drive the motor and charge the battery at the same time. This enriches the operation modes of the energy conversion device and expands the range of application of the energy conversion device. Improve.

[0091] In a specific embodiment, as shown in FIG. 17, the first DC / DC conversion circuit 155 switch transistor Q3 to switch transistor Q10, inductor L2, inductor L 3, including a capacitor C2, a capacitor C3 and a transformer T1, and a switch transistor Q3 ~Switch transistor Q10, inductor L2, inductor L3, and capacitor C2 The connection relationship between the first converter 151 and the second converter C3 is the same as that between the first converter 151 and the second converter C4 shown in FIG. Since the connection relationship is the same as that of the converter 152, the relevant explanation of FIG. 14 can be referred to. The connection relationship between the transformer T1 and other components will be described with reference to the specific illustration in FIG. Please refer to the same reference number, and the description will be omitted here.

[0092] The second DC / DC conversion circuit 156 includes a switch transistor Q31, a switch Transistor Q41, switch transistor Q51, switch transistor Q61, switch switch transistor Q11, switch transistor Q12, switch transistor Q13, The circuit includes a switch transistor Q14, an inductor L21, a capacitor C21, and a transformer T2. , switch transistor Q31, switch transistor Q41, switch transistor Q 51, switch transistor Q61, switch transistor Q11, switch transistor Q12, switch transistor Q13, switch transistor Q14, inductor L2 1. The connection relationship between the capacitor C21 and the transformer T2 is shown in FIG. Therefore, the description will be omitted here.

[0093] In the present application, the bidirectional DC module 15 shown in FIG. 15 or FIG. 17 The converter is turned off when the power battery 200 becomes seriously depleted or the power battery 200 becomes faulty. If the current cannot be output normally due to the above, the fifth switch unit 145 and the sixth switch unit By opening the switch unit 146, the storage battery is connected to the bidirectional DC module 15, The motor is driven by supplying electric power to the motor through the converter 12, and the motor is driven in an emergency. It is possible to achieve this.

[0094] As one embodiment of the present application, as shown in FIG. 15 or FIG. 17, the energy conversion device further includes a switch K11 and a resistor R1, By configuring the pre-charging module, when the energy conversion device is in operation, the switch By precharging K7 and switch K9, switch K7 and switch K9 fail. This prevents the occurrence of problems and further reduces the failure rate of the energy conversion device.

[0095] Specifically, as shown in FIG. 15 or FIG. 17, the switch K11 has a first terminal The second end of the switch K7 is connected to the second end of the switch K9 and the first end of the resistor R1. The second end of resistor R1 is connected to the first end of switch K7 and the first end of switch K9. and the positive terminal of the battery 200.

[0096] As one embodiment of the present application, as shown in FIG. 11, FIG. 14, FIG. 15 or FIG. The bridge converter 12 in the energy conversion device includes a first power switch connected in series. A third power switch unit 1 and a second power switch unit 2 are connected in series. The fourth power switch unit 3 and the fourth power switch unit 4, and the fifth power switch unit The power switch unit 5 and the sixth power switch unit 6 are connected to each other. nothing.

[0097] Specifically, the first end of the first power switch unit 1, the third power switch unit The first end of the fifth power switch unit 3 and the first end of the fifth power switch unit 5 are commonly connected to each other. The positive side of the bridge converter 12 is connected to the positive side of the directional bridge 13, The second end of the second power switch unit 2, the second end of the fourth power switch unit 4 and the second end of the sixth power switch unit 6 are commonly connected to form a bidirectional bridge 13, forming the negative side of the bridge converter 12 connected to the negative side of The second end of the first power switch unit 1 and the first end of the second power switch unit 2 The connection point with the end of the third power switch is connected to the first phase coil of the motor coil 11. The connection point between the second end of the fourth power switch unit 3 and the first end of the fourth power switch unit 4 is a second phase coil of the fifth power switch unit 5; The connection point between the first end of the sixth power switch unit 6 and the third end of the motor coil 11 is connected to the phase coil.

[0098] In the embodiment of the present application, the multiple power switches in the bridge converter 12 The unit is a device in which diodes are connected in parallel and can perform switching operations, e.g. For example, power transistors, metal-oxide semiconductor field effect transistors (Metal-Oxide de-Semiconductor Field-Effect Transistor , MOSFET), Insulated Gate Bipolar Transistor (Insulated Gate It uses switching devices such as IGBTs (Insulated Bipolar Transistors). This can be achieved by

[0099] In another embodiment of the present application, when the bridge converter 12 operates, the first phase bridge a power switch unit in the first phase bridge and a power switch unit in the second phase bridge The power switch units in the first and second phase bridges sequentially transmit predetermined out-of-phase control signals. Next, the signal is received and the three-phase interleave control method is started. is preferably an angle of 120 degrees, and the preferred angle does not limit the predetermined phase.

[0100] Specifically, when the bridge converter 12 operates, the operation timing diagram shown in FIG. As can be seen, the control signal PWM1 controls the first phase of the bridge converter 12. The first power switch unit 1 and the second power switch unit 2 of the bridge are turned on. When the control signal PWM1 becomes high level, the first power switch unit The first power switch unit 1 is controlled to be turned on, and the second power switch unit 2 is controlled to be turned off. When the control signal PWM1 becomes low level, the second power switch unit 2 is turned on. The first power switch unit 1 is controlled to be turned on, and the second power switch unit 2 is controlled to be turned off. After being out of phase with the control signal PWM1 by a predetermined amount, the control signal PWM2 is The third power switch unit 3 and the fourth power switch unit 4 of the second phase bridge in Controls the on / off of unit 4, and when the control signal PWM2 becomes high level, the third power The first power switch unit 3 is controlled to be turned on, and the fourth power switch unit 4 is controlled to be turned off. When the control signal PWM2 becomes low level, the fourth power switch is turned on. 4 to turn on the first power switch unit 10 and turn off the second power switch unit 11. After being shifted in phase with the control signal PWM2 by a predetermined amount, the control signal PWM3 is The fifth and sixth power switch units 5 and 6 of the third phase bridge in the multiconverter 12 The power switch unit 6 is turned on and off, and the control signal PWM3 becomes high level. At this time, the fifth power switch unit 5 is controlled to be turned on, and the sixth power switch When the control signal PWM3 becomes low level, the first switch unit 6 is turned off. 6 to turn on the power switch unit 6, and the fifth power switch unit By controlling the third phase of the bridge controller 120 to turn off the third phase of the bridge controller 120, -Release control is realized.

[0101] In this embodiment, the bridge converter 1 is operated by a three-phase interleaved control. By controlling the two three-phase bridges, the equivalent inductance is increased when the energy conversion device is charging. Effectively improves inductance and further increases charging power, making it ideal for energy conversion devices. There is no need to increase the inductor L1, and the number of electronic components in the energy conversion device is reduced. This reduces the number and cost of energy conversion devices.

[0102] As one embodiment of the present application, as shown in FIG. 11, FIG. 14, FIG. 15 or FIG. The bidirectional bridge 13 in the energy converter is a seventh power switch unit connected in series. A seventh power switch unit Q1 and an eighth power switch unit Q2 are included. The first end of the eighth power switch unit Q1 is the positive side of the bidirectional bridge 13, and the eighth power switch unit Q The second end of the seventh power switch unit Q1 is the negative side of the bidirectional bridge 13. The connection point between the second end of the eighth power switch unit Q2 and the first end of the eighth power switch unit Q3 constitutes a bidirectional bridge 1 It is the midpoint between 3.

[0103] Hereinafter, using the circuits shown in FIG. 14 and FIG. 15 as examples, different examples of the energy conversion device according to the present application will be described. The principle of operation in this embodiment will now be specifically described.

[0104] Specifically, as shown in FIG. 14, the energy conversion device operates in a DC charging mode; When the DC charging mode is non-isolated DC charging, the first switch K1, the second switch K2, switch K11, switch K7 and switch K8 are closed, and the other switch elements K 3, K4, K9 and K10 are opened, and the direct current received by the DC charging port 101 at this time The current voltage is generated by the inductor L1, the three-phase windings U, V, and W of the motor coil 11, and the bridge converter. After being boosted by the inverter 12, the voltage is output to the battery 200 by the capacitor C1. This realizes DC charging of the battery 200.

[0105] Alternatively, as shown in FIG. 14, the energy conversion device operates in a DC charging mode, and the DC When the DC charging mode is non-isolated DC charging, the first switch K1 and the second switch K2 , the switches K11, K7 and K8 are closed, and the other switch elements K3, K4, K9 and K10 are opened, and at this time, the DC power received by the DC charging port 101 is The voltage is boosted by the three-phase windings U, V, and W of the motor coil 11 and the bridge converter 12. Then, the capacitor C1 outputs the current to the battery 200, thereby charging the battery 200 with DC. To achieve this.

[0106] In addition, when the energy conversion device operates in a DC charging mode, and the DC charging mode is an isolated DC charging mode, as shown in FIG. 14, the first switch K1, the second switch K2, the switch K9 and the switch K10 are closed, and the other switch elements K3, K4, K7 , K8and K11 are opened, and at this time, the DC voltage received by the DC charging port 101 passes through the inductor L1 and is sent from the motor to the three-phase windings U, V, and W of the motor coil 11, and is then boosted by the bridge converter 12 to output a voltage U0, which is filtered by the capacitor C1 and then full-bridge rectified by the switch transistors Q3, Q4, Q5, and Q6 before being output to the transformer T1, reverse-transformed by the transformer T1, rectified by the switch transistors Q7, Q8, Q9, and Q10, and then output to the battery 200 by the filter capacitor C4, thereby achieving isolated DC charging of the battery 200. Note that in this embodiment, isolated DC charging is mainly used when special charging facilities are difficult to match with the battery voltage of the electric vehicle and need to be completed by two-stage voltage regulation.

[0107] Alternatively, as shown in FIG. 15, the first switch K1, the second switch K2, the switch K9 and the switch K10 are closed, and the other switch elements K3, K4, K7 , K8 and K11 are opened, and at this time the DC voltage received by the DC charging port 101 is sent from the motor to the three-phase windings U, V, W of the motor coil 11, and then boosted by the bridge converter 12 to output a voltage U0. The voltage U0 is filtered by the capacitor C1, and then full-bridge rectified by the switch transistors Q3, Q4, Q5, and Q6 before being output to the transformer T1, inversely converted by the transformer T1, rectified by the switch transistors Q7, Q8, Q9, and Q10, and then passed through the filter capacitor C4 to be output to the battery 200, thereby achieving isolated DC charging of the battery 200.

[0108] As shown in FIG. 14, when the energy conversion device operates in an AC charging mode, the third switch K3, a fourth switch K4, a switch K11, a switch K9 and a switch K10 is closed, and the other switch elements K1, K2, K7 and K8 are opened. At this time, the AC charging port The AC voltage received by port 102 passes through inductor L1 at one end and is connected to the motor neutral point. The neutral wire drawn from the motor coil 11 enters the three-phase windings U, V, and W of the motor coil 11, and then The current flows through a bidirectional bridge Q1 and Q2 at the other end of the bridge converter 12, and then through the bidirectional bridge Q1 and Q2 at the other end of the bridge After full-bridge rectification is performed by the bridges Q1 and Q2 and the bridge converter 12, the voltage U0 is output, and the voltage U0 is filtered by the capacitor C1 and then output to Q3 After being rectified by the full bridge composed of Q6, it is further inversely transformed by the transformer T1. Then, it is rectified by the full bridge consisting of Q7 to Q10 and then fed to the capacitor C4. The power is filtered by the power supply and output to the battery 200 for charging. Realizes current charging.

[0109] Alternatively, when the energy conversion device operates in an AC charging mode, the third switch K3 , the fourth switch K4, the switch K11, the switch K7 and the switch K8 are closed, and the others At this time, the switches K1, K2, K9 and K10 are opened, and the AC charging port 102 The received AC voltage passes through inductor L1 at one end and is tapped off from the motor neutral. The neutral line enters the three-phase windings U, V, and W of the motor coil 11, and then the bridge converter 1 2, passes through bridges Q1 and Q2 at the other end, and then After full-bridge rectification is performed by the diode converter 12, a voltage U0 is output. U0 is the voltage output to the battery 200 after being filtered by the capacitor C1. By charging, AC charging of the battery 200 is achieved.

[0110] Alternatively, as shown in FIG. 15, when the energy conversion device operates in an AC charging mode, , a third switch K3, a fourth switch K4, a switch K11, a switch K9 and a switch Switch K10 is closed, and the other switch elements K1, K2, K7 and K8 are open. The AC voltage received by the AC charging port 102 is derived from the motor neutral at one end. The neutral line enters the three-phase windings U, V, and W of the motor coil 11, and then the bridge converter 1 2, passes through the first bridge Q1 and Q2 at the other end, and then After full-bridge rectification is performed by the bridge converter 12, a voltage U0 is output. The voltage U0 is filtered by the capacitor C1 and then fed to the full amplifier formed by Q3 to Q6. After being rectified by the bridge, it is inversely transformed by the transformer T1, and then further converted by Q7 to Q10. The output is rectified by a full bridge and filtered by capacitor C4. The battery 200 is charged by outputting the current to the battery 200, thereby achieving AC charging of the battery 200. Alternatively, A third switch K3, a fourth switch K4, a switch K11, a switch K7 and a switch K8 is closed, and other switches K1, K2, K9 and K10 are opened, and at this time AC charging The AC voltage received by port 102 is fed to a neutral conductor drawn from the motor neutral at one end. It then enters the three-phase windings U, V, and W of the motor coil 11, and then enters the bridge converter 12. At the other end, it passes through bridges Q1 and Q2, and then connects to bridge capacitors Q1 and Q2. After full-bridge rectification is performed by the inverter 12, a voltage U0 is output. , which is filtered by the capacitor C1 and then output to the battery 200 to charge it. This allows AC charging of the battery 200 to be achieved.

[0111] In this embodiment, the energy conversion device according to the present application controls the on / off of each switch. As a result, the AC current received by the AC charging port 102 is passed through the inductor L1, the motor After passing through the coil 11, the bridge converter 12 and the bidirectional bridge 13, the battery 200 The AC charging method is not limited to one method. The AC charging method of the energy conversion device has a large margin and can self-adjust the operating voltage, which allows Improve the charging efficiency and at the same time effectively ensure the AC charging function of the energy conversion device It is possible.

[0112] As shown in FIG. 14, when the energy conversion device operates in an AC discharge mode, the second switch The first switch unit 142 and the sixth switch unit 146 are turned on, When the fifth switch unit 141 and the fifth switch unit 145 are turned off, the battery 200 is The high voltage DC current output from the inductor L1 passes through the motor coil 11 and the bridge converter. 12, the bidirectional bridge 13 and the bidirectional DC module 15 act to connect the AC charging port 102 Discharge to the outside by When the energy conversion device operates in an AC discharge mode, the second switch unit 142 and the fifth switch unit 145 are turned on, and the first switch unit 141 and the sixth switch unit When the switch unit 146 is turned off, the high voltage direct current output from the battery 200 The current flows through the inductor L1, the motor coil 11, the bridge converter 12 and the bidirectional bridge. By the action of the switch 13, the battery is discharged to the outside via the AC charging port 102.

[0113] As shown in FIG. 15, when the energy conversion device operates in an AC discharge mode, the second switch The first switch unit 142 and the sixth switch unit 146 are turned on, When the fifth switch unit 141 and the fifth switch unit 145 are turned off, the battery 200 is The high voltage DC current output from the motor coil 11, the bridge converter 12, the bidirectional bridge The AC charging port 102 discharges the battery to the outside due to the action of the bridge 13 and the bidirectional DC module 15. Or, When the energy conversion device operates in an AC discharge mode, the second switch unit 142 and the fifth switch unit 145 are turned on, and the first switch unit 141 and the sixth switch unit When the switch unit 146 is turned off, the high voltage direct current output from the battery 200 The current is alternating through the action of the motor coil 11, the bridge converter 12, and the bidirectional bridge 13. The battery is discharged externally via the current charging port 102.

[0114] In this embodiment, the AC discharge operation mode of the energy conversion device and the AC charge operation mode Since the principle of the AC discharge operation mode of the energy conversion device is opposite to that of the AC discharge operation mode, The detailed operating principle can be seen in the specific operating process of the AC charging mode. The explanation will be omitted.

[0115] In addition, the energy conversion device according to the present application not only operates in an AC charging mode, but also in an AC Since it can operate in discharge mode, the energy conversion device can be installed in two vehicles at the same time. When two vehicles are connected to each other, an AC discharge is performed on one vehicle and an AC discharge is performed on the other vehicles. By charging the battery, the vehicle can be charged.

[0116] As shown in Figure 14, when the energy conversion device operates in motor drive mode, the switch Switch K11, switch K7 and switch K8 are closed, and the other switches K1 to K4 and K9 〜K10 is opened, at this time the battery 200 outputs high voltage DC current, which is The current passes through the three-phase motor drive bridge of the ridge converter 12 and is converted into three-phase AC current. The motor is driven by being output to the three-phase windings of the motor coil 11.

[0117] In this embodiment, the energy conversion device according to the present invention includes a motor coil 11, a bridge capacitor The inverter 12, the bidirectional bridge 13 and the bidirectional DC module 15 are integrated into one circuit. This allows the vehicle motor to be driven and also allows AC charging and discharging of the vehicle battery. This allows the circuit integration to be improved while at the same time reducing the circuit cost and the circuit volume. This reduces the number of inputs and the circuit structure is simplified.

[0118] As shown in Figure 14, when the energy conversion device operates in DC external discharge mode, Switch K11, switch K7, switch K8, switch K1 and switch K2 are closed, Switches K3, K4, K9 and K10 are opened, and at this time the battery The DC current output from 200 is fed to the three-phase motor drive bridge of the bridge converter 12, Through the three-phase windings U, V, and W of the motor coil 11, the inductor L1, and the DC charging port 101 This allows the DC current to be discharged to the outside.

[0119] As shown in FIG. 14, when the energy conversion device operates in the driving discharge mode, the switch K11, the switch K7 and switch K8is closed, switches K1 to K4, K9 and K10 are opened, and the high-voltage current output from the battery 200 at this time passes through capacitor C1, and then a portion of the high-voltage current is output to the three-phase motor drive bridge of the bridge converter 12, and after being converted by the three-phase motor drive bridge, drives the three-phase winding of the motor coil 11, and another portion is output to a full bridge circuit made up of switches Q3 to Q6, and after being rectified by the full bridge circuit, is converted by transformer T1, capacitor C2 and inductor L2, and further rectified by the full bridge circuit of switches Q11 to Q14, and then filtered by the capacitor, and a low-voltage DC voltage of 13.8 V is output to the on-board discharge port.

[0120] In this embodiment, the energy conversion device according to the present application controls the on / off of each switch. As a result, the high voltage DC current output from the battery 200 is passed through the bridge controller 120, The bidirectional bridge 13 and the bidirectional DC module 15 act to drive the motor. At the same time, the high voltage DC current output from the battery 200 operates the bidirectional DC module 15. By outputting it as low voltage direct current for this purpose, it is possible to drive a motor using a single circuit. At the same time, it is possible to perform DC discharge.

[0121] In another embodiment of the present application, the energy conversion device is in DC discharge mode, as shown in FIG. When operating in the mode, the switches K9, K10 and K11 are closed and switch K1, switch K2, switch K3, switch K4, switch K7 and switch K8 At this time, the high voltage current output from the battery 200 is switched on through the capacitor C4. The output of the full bridge circuit is made up of switch Q7 to switch Q10. The current is rectified by the inductor L3, the capacitor C3, and the transformer T1. The signal is then rectified again by switches Q11 to Q14, and then the capacitor C5 The filtered low-voltage DC voltage of 13.8V is output to the vehicle's discharge port.

[0122] In this embodiment, the energy conversion device according to the present application turns on and off each switch in the circuit. By controlling the switch, the high voltage direct current output from the battery 200 is passed through the bidirectional DC module. The output is a low-voltage direct current due to the action of the regulator 15. Select the DC output path to prevent the circuit from having only one DC discharge path and a fault occurring on that path. In this case, the problem of being unable to perform DC discharge can be avoided.

[0123] In another embodiment of the present application, the energy conversion device is a smart charging device, as shown in FIG. When operating in mode, switches K9, K10 and K11 are closed, The switches K1 to K4, K7 and K8 are opened, and at this time, the battery 200 The output high voltage current is fed to the capacitor C4 via the switches Q7 to Q10. The output is then rectified by the full bridge circuit, and the inductor L3 , which is converted by the capacitor C3 and the transformer T1, and is further converted by the switch Q11 to the switch Q1 After being re-rectified by 4, it is filtered by capacitor C5 to produce a low voltage of 13.8V. By outputting a DC voltage, the storage battery is charged with the low DC voltage of 13.8V.

[0124] In this embodiment, the energy conversion device according to the present application controls the on / off of each switch. As a result, the high voltage direct current output from the battery 200 is used to operate the bidirectional DC module 15. The power supply is used to charge the storage battery, and the power supply is output as low-voltage direct current. This allows smart charging of the energy conversion device.

[0125] In another embodiment of the present application, as shown in FIG. 14, the energy conversion device is an external emergency AC When operating in the discharge mode, switches K3 and K4 are closed and switches K1, Switch K2, switch K7 to switch K11 are opened, and the output from the storage battery The low-voltage DC current passes through the filter capacitor C5 and then through the switches Q11 to Q1 The output is rectified by a full bridge circuit consisting of transformer T1, inductor L2 and capacitor L3. After being converted by the capacitor C2, the bridge rectifier consisting of switches Q3 to Q6 After being rectified by the circuit, it is output to the capacitor C1, and filtered by the capacitor C1. The three-phase motor drive bridge and switches Q1 and Q2 of the bridge converter 12 are connected to the This is converted to AC by a circuit consisting of the coil Q2 and the three-phase winding Q3 of the motor coil 11. After being filtered by the line and inductor L1, the AC is passed through the AC charging port 102. The AC current is output and used outside the vehicle, allowing for external emergency AC discharge from the energy conversion device. Realize power mode.

[0126] Alternatively, as shown in FIG. 15, when the circuit 100 operates in an external emergency AC discharge mode, Switches K3 and K4 are closed, and switches K1, K2, and K7 are ~ Switch K11 is opened, and the low-voltage DC current output from the battery is passed through the filter After passing through capacitor C5, the full bridge formed by switches Q11 to Q14 The circuit is rectified and transformed by the transformer T1, the inductor L2 and the capacitor C2. Then, the signal is rectified by the bridge rectifier circuit consisting of switches Q3 to Q6. The output is filtered by the capacitor C1 and the bridge converter The circuit consists of a three-phase motor drive bridge of 12 and switches Q1 and Q2. This is then converted into AC current by the three-phase windings of the motor coil 11, which then filters the AC current. Then, the AC current is output through the AC charging port 102 and used outside the vehicle. , realizing the external emergency AC discharge mode of the circuit 100.

[0127] In this embodiment, when the battery 200 is broken and cannot be used, the energy conversion The converter controls the on / off of each switch to generate low-voltage DC current from the battery. The flow includes a bidirectional DC module 15, a bidirectional bridge 13, a bridge converter 12, and a motor. AC current is supplied to the outside via the AC charging port 102 by the action of the coil 11, etc. Thus, an external emergency AC discharge of the energy conversion device is realized.

[0128] In another embodiment of the present application, as shown in FIG. 14, the energy conversion device is in emergency drive mode. When operating in the power-saving mode, all the switches in the energy conversion device are open, and the battery The low-voltage DC current output from the switch Q11 passes through the filter capacitor C5. ~The output is rectified by a full bridge circuit consisting of switch Q14, and then the transformer T1 and The inductor L2 and the capacitor C2 are used to convert the The signal is rectified by the bridge rectifier circuit and then output to the capacitor C1. After being filtered by the The current is converted into a three-phase AC current and output to the three-phase windings of the motor coil 11. , driving the motor.

[0129] In this embodiment, the battery 200 is broken and cannot be used, but it is necessary to drive the motor. In this case, the energy conversion device according to the present application turns on the switch elements K1 to K11. By controlling the off state, the low-voltage DC current output from the storage battery is The energy is then passed through the bridge converter 12 to drive the motor. This enables emergency operation of the energy conversion device and ensures normal operation of the vehicle.

[0130] In addition, this application mainly relates to a device having a driving function and a charging function, taking the circuits shown in FIG. 14 and FIG. 15 as examples. The specific operation modes of the circuit 100 and the specific operation principles of the circuit 100 in each mode will be described. When the circuit 100 is realized as shown in FIG. The operating principle of the DC / DC conversion circuit 1 is the bidirectional DC module 1 shown in FIG. 14 or FIG. 5, the first converter 151, the second converter 152 and the transformer unit 154 The operating principle and process are the same as those of the second DC / DC conversion circuit shown in FIG. The operation principle and operation process of the first converter 151 and the third converter 153 shown in FIG. Therefore, the operation principle of the first DC / DC conversion circuit and the second DC / DC conversion circuit is the same as that of the first DC / DC conversion circuit. The operation principle of the bidirectional DC module 15 shown in FIG. 14 or FIG. 15 may be referred to. , and the explanation will be omitted here.

[0131] In another embodiment of the present application, as shown in FIG. 19, the present application provides an energy conversion device and a control There is further provided a power system 300 that includes a control module (not shown).

[0132] The energy conversion device includes a motor 301 including a motor coil, a motor control module 3 302 and an on-board charging module 303. The motor control module 302 is a motor coil. The other end of the motor coil is connected to an external charging port. 10, and the vehicle charging module 303 includes a bidirectional bridge, are connected in parallel to the bridge converter to form a first common connection terminal and a second common connection terminal. , the first common connection terminal is connected to one end of the external battery 200, and the second common connection terminal is connected to the other end of the battery. , and the charging port 10 is connected to the second common connection terminal and the bidirectional bridge.

[0133] The control module includes a charging port 10, a motor coil, a bridge converter, and a battery 20. 0, the DC charging circuit, the charging port 10, the motor coil, the bridge converter, The AC charging circuit is composed of a bidirectional bridge and a battery 200, and the motor coil, the bridge coil, The inverter and the battery 200 constitute a motor drive circuit, and the DC charging circuit and the AC charging circuit are controlled. The power circuit and the drive circuit share the motor coil and bridge converter.

[0134] In one embodiment of the present application, the energy conversion device further includes a switch module. The control module controls the switch module to select the DC charging mode, the AC charging mode, and the Realizes switching between current charging mode and driving mode, In a DC charging mode, the charging port 10, the motor coil, the bridge converter and the battery 20 0 constitutes a DC charging circuit, In AC charging mode, charging port 10, motor coil, bridge converter, bidirectional bridge The edge 13 and the battery 200 constitute an AC charging circuit. In the driving mode, the motor coil, the bridge converter, and the battery 200 form a motor driving circuit. Configure.

[0135] In one embodiment of the present application, the charging port includes a DC charging port and an AC charging port. The switch module includes a first switch unit and a second switch unit. , The control module controls the first switch unit to be turned on, and the second switch unit Control the unit to turn off, DC charging port, first switch unit, motor The coil, bridge converter, and battery form a DC charging circuit, Enter the mode, The control module controls the first switch unit to be turned off, and the second switch unit to be turned on. Controls the unit to turn on, AC charging port, second switch unit, motor The coil, bridge converter, bidirectional bridge and battery constitute an AC charging circuit. Then, it will enter AC charging mode, The control module turns off both the first switch unit and the second switch unit. The motor coil, bridge converter, and battery constitute the motor drive circuit. This causes the device to enter drive mode.

[0136] In one embodiment of the present application, the charging port includes an AC / DC charging port and a switch the module includes a third switch unit and a fourth switch unit; The control module controls the third switch unit to turn on, and the fourth switch Controls the unit to connect to a bridge converter, AC / DC charging port, 3rd a switch unit, a fourth switch unit, a motor coil, a bridge converter, and The battery forms a DC charging circuit, and the device enters DC charging mode. The control module controls the third switch unit to turn on, and the fourth switch Control the unit to connect to a bidirectional bridge, providing an AC / DC charging port, a third switch a switch unit, a fourth switch unit, a motor coil, a bridge converter, and a battery By configuring the AC charging circuit, the device enters AC charging mode. The control module turns off both the third switch unit and the fourth switch unit. The motor coil, bridge converter, and battery constitute the motor drive circuit. This causes the device to enter drive mode.

[0137] As an embodiment of the present application, the energy conversion device further includes a neutral switch, The motor coil includes three phase windings, each phase winding includes N coil branch circuits, and each phase winding The N coil branch circuits in the line are connected together at the first end to form a bridge converter. and the second end is connected in one-to-one correspondence to the second ends of the N coil branch circuits in the other two phase windings. are connected correspondingly to form N neutral points, and the charging ports are connected to the M neutral points; where N is an integer greater than 1, M is a positive integer less than N, The control module controls the neutral point switch to provide N neutral points for the motor coils. Among them, M neutral points are connected to the charging port.

[0138] In one embodiment of the present application, the bridge converter includes a three-phase bridge and When the converter operates in a DC charging mode, the control module controls the first transmitting the control signal, the second control signal, and the third control signal to a bridge converter; To realize DC charging, the control module controls the first phase brake according to the first control signal. The two power switch units of the ridge are alternately turned on, and the second control signal The two power switch units of the second phase bridge are alternately turned on based on the and controlling the two power switch units of the third phase bridge according to the third control signal. are controlled to be turned on alternately.

[0139] In one embodiment of the present application, the bridge converter includes a three-phase bridge and When the converter operates in an AC charging mode, the control module sending the first control signal, the fifth control signal, and the sixth control signal to a bridge converter; To realize AC charging, the control module selects a bidirectional brake based on the frequency of the AC current. The ridge's two power switch units are alternately turned on, and the fourth control signal The two power switch units of the first phase bridge are alternately turned on based on the and controlling the two power switch units of the second phase bridge according to the fifth control signal. and controlling the two of the third phase bridge to be turned on alternately based on the sixth control signal. The power switch units are controlled to be turned on alternately.

[0140] In one embodiment of the present application, as shown in FIG. 21, a motor control module 302 and a vehicle The on-board charging module 303 is integrated in the first case 500. In the example, the motor control module 302 and the on-board charging module 303 are The number of the sub-ports may be divided into two, and no specific limitation is imposed here.

[0141] In this embodiment, the motor control module 302 and the in-vehicle charging module 303 are integrated into one By integrating the components into a case, the overall structure of the power system 300 can be made more compact. Furthermore, by reducing the volume of the power system 300, Reduces the weight of the vehicle to which 00 is applied.

[0142] As one embodiment of the present application, as shown in FIG. 21, a power system 300 includes a motor 3 19 (not shown, see FIG. 19 ) to reduce the The transmission 304 and the motor 301 are integrated in the second case.

[0143] In one embodiment of the present application, the first case is fixedly connected to the second case.

[0144] In a specific implementation, the first case and the second case are connected in any manner that has a fixing effect. Alternatively, the first case may have a fixed member that can be connected to the second case. Alternatively, the second case is provided with a fixing member that can be connected to the first case. and no specific restrictions are imposed here.

[0145] In this embodiment, the first case and the second case are fixed together. The separation between the first case and the second case can be effectively prevented, so that the motor control motor The module 302, the vehicle-mounted charging module 303, the motor 301, and the reducer 304 are connected to each other through a cable. This ensures that the power system 300 will not break down due to the loss of the coil, thereby improving the operational reliability and Improve stability.

[0146] In one embodiment of the present application, as shown in FIG. 20, the power system 300 is a separate vehicle. The on-board charging module 303 and the battery 200 are electrically connected, and the two are integrated into the first case. It further includes a directional DC module 305 .

[0147] In this embodiment, the addition of a bi-directional DC module 305 to the power system 300 Thus, the bidirectional DC module 1305 and the charging port 10 in the power system 300 , the motor 301, the motor control module 302 and the on-board charging module 303 are connected to another AC A charging circuit is configured to enrich the AC charging mode of the power system 300, and the power system 3 The charging method of 00 has a margin, and improves the safety of the AC charging process of the power system 300 To make.

[0148] In one embodiment of the present application, as shown in FIG. 20, a power system 300 includes a motor control A capacitor 306 is connected in parallel to the control module 302 and integrated in the first case. Included.

[0149] Specifically, when the power system 300 is in a DC charging mode or an AC charging mode, In operation, the capacitor 306 provides a current to the battery 200 during a DC or AC charging process. The motor control module 302 or the motor control module 302 and the on-board charging module In addition to filtering the voltage output from the motor control module 303, the motor control module 302 Or based on the voltage output from the motor control module 302 and the in-vehicle charging module 303 By storing energy based on the above, the DC or AC charging of the battery 200 is completed. It is possible.

[0150] In this embodiment, a capacitor 306 is provided in the power system 300. The capacitor 306 is connected to the motor control module 302 or the motor control module 302 and the vehicle In addition to filtering the voltage output from the on-board charging module 303, The control module 302 or the motor control module 302 and the on-board charging module 303 By storing energy based on the voltage output from the battery 200, the battery 200 can be charged or discharged by DC. can complete AC charging, thereby ensuring the normal charging function of the power system 300. This can ensure that no other clutter interferes with the charging process.

[0151] In this embodiment, the specific structure and operation principle of the energy conversion device are shown in FIG. 1 to 18 of the energy conversion device, For a specific explanation of the operation principle, please refer to the detailed explanation of Figures 1 to 18. The explanation will be omitted here.

[0152] In another embodiment of the present application, the present application further provides a vehicle including the power system. The power system included in the vehicle according to the embodiment of the present application is the power system shown in FIGS. 300, the specific operation of the power system in the vehicle according to the embodiment of the present application The principle can be seen in the detailed description of FIGS. 19 to 21. is omitted.

[0153] In the present application, the vehicle according to the present application includes a motor 301, a motor control module 302, and a vehicle By using a power system 300 including an on-board charging module 303, the power system When applying the 300, it operates in time-sharing drive mode, DC charging mode and AC charging mode. Furthermore, it is possible to realize a vehicle motor drive and battery charging using the same system. In particular, by using the same circuit topology, it is possible to realize both DC and AC charging. The degree of component redundancy is high, the system integration is high, and the structure is simple. This reduces system costs and reduces the system volume, and eliminates the need for traditional motor drive and charging systems. Solves the problems of the overall system structure being complicated, low integration, large volume, and high cost. do.

[0154] In the description of this application, the terms "center," "vertical direction," "horizontal direction," "length," and "width" are used interchangeably. ", "Thickness", "Top", "Bottom", "Front", "Back", "Left", "Right", "Vertical", "Horizontal" "Top", "Bottom", "Inside", "Outside", "Clockwise", "Counterclockwise", "Axial", "Semi- The orientation or positional relationship indicated as "radial direction", "circumferential direction", etc. is based on the orientation or positional relationship shown in the drawings. The drawings are based on the principles of the present invention and are merely intended to facilitate and simplify the description of the present application. A device or part must have a specific orientation and be configured and operated in a specific orientation. The present application is not intended to limit the scope of the present invention, nor to indicate or imply that the present invention is not limited to the present application. You shouldn't.

[0155] Additionally, the terms "first" and "second" are for descriptive purposes only and are relative. indicates or implies the importance of the technical feature or indicates implicitly the quantity of the technical feature indicated Therefore, the features defined by "first" and "second" should not be understood as being the same as the features defined by "first" and "second" in the present invention. In the description of this application, "plurality" may include one or more of the features. means two or more, unless expressly and specifically limited.

[0156] In this application, unless expressly specified or limited, the terms "attached," "connected," "coupled," "connected ... The term "fixed" should be understood in a broad sense, and may include, for example, a fixed connection, a detachable connection, a The connection may be a physical connection, a mechanical connection, or an electrical connection. , a connection between two elements, which may be a direct connection or a connection via an intermediate medium. The relationship may be a communication between two elements, or an interaction between two elements. The specific meaning of the above terms in this application may be understood depending on the context.

[0157] In this application, unless expressly specified and limited, it is understood that a first feature is "on" or "above" a second feature. "Under" may include direct contact between the first feature and the second feature. , the first feature and the second feature may be in indirect contact with each other via an intermediate medium. In addition, a first feature being "on," "above," or "on the surface" of a second feature means that the first feature is may be directly above and diagonally above the second feature, or simply in the horizontal direction of the first feature. The first feature may be higher than the second feature. "Below," "under" or "on the underside" of a feature means that a first feature is directly below and diagonally below a second feature. It is also possible for the first feature to be below the second feature, or simply that the first feature is higher in the horizontal direction than the second feature. It may be to indicate that the

[0158] In the description herein, the terms "in one embodiment," "some embodiments," "examples," and "specific examples" may be used interchangeably. Any reference to "examples" or "some examples" or the like is intended to be taken in conjunction with the examples or examples. The specific features, structures, materials, or characteristics are included in at least one embodiment or example of the present application. In this specification, illustrative examples of the above terms do not necessarily refer to the same embodiment or No examples are given, and the specific features, structures, materials, or characteristics described are not necessarily intended to be limiting. In one or more of the embodiments or examples, the components may be combined in any suitable manner. Unless inconsistent, those skilled in the art will recognize and appreciate the various embodiments and examples described herein and the various Features of the embodiments and examples may be combined or combined.

[0159] Although the embodiments of the present application have been shown and described above, the above embodiments are merely illustrative and should not be construed as limiting the present application. It should not be understood as limiting, and those skilled in the art would be able to implement the above examples within the scope of the present application. Changes, modifications, substitutions and variations can be made to the above.

Claims

1. A motor coil, a bridge converter and a bidirectional bridge are included. the bridge converter is separately connected to the motor coil and the bidirectional bridge; The motor coil, the bridge converter and the bidirectional bridge are all connected to an external charging port, and the bridge converter and the bidirectional bridge are both connected to an external battery; the motor coil, the bridge converter, and the external charging port form a DC charging circuit to charge an external battery; the motor coil, the bridge converter, the bidirectional bridge, and the external charging port form an AC charging circuit to charge an external battery; the motor coil, the bridge converter, and the external battery constitute a motor drive circuit; the DC charging circuit, the AC charging circuit, and the motor drive circuit share the motor coil and the bridge converter; An energy conversion device, characterized in that the bidirectional bridge is used in the AC charging circuit and is not used in the DC charging circuit and the motor drive circuit.

2. 2. The energy conversion device of claim 1, wherein the motor coil includes a three-phase winding, each phase winding includes N coil branch circuits, first ends of the N coil branch circuits in each phase winding are commonly connected and then connected to the bridge converter, and second ends of the coil branch circuits of any one of the phase windings are connected to second ends of corresponding coil branch circuits in the other two phase windings to form N neutral points, and the charging port is connected to M neutral points, where N is an integer greater than 1 and M is a positive integer less than N.

3. 3. The energy conversion device according to claim 2, wherein the value of N is 4.

4. 4. The energy conversion device according to claim 3, further comprising a neutral point switch configured to control M neutral points of the N neutral points of the motor coil to be connected to the charging port.

5. 2. The energy conversion device of claim 1, further comprising a switch module, one end of which is connected to the charging port and the other end of which is separately connected to the motor coil, the bridge converter and the bidirectional bridge.

6. The charging port includes a DC charging port and an AC charging port, 6. The energy conversion device according to claim 5, wherein the switch module includes a first switch unit and a second switch unit, the DC charging port, the first switch unit, the motor coil, and the bridge converter form a DC charging circuit or a DC discharging circuit for the battery, and the AC charging port, the second switch unit, the motor coil, the bridge converter, and the bidirectional bridge form an AC charging circuit or an AC discharging circuit for the battery.

7. the first switch unit includes a first switch and a second switch, and the second switch unit includes a third switch and a fourth switch; the first switch has one end connected to the DC charging port and the other end connected to the motor coil, the second switch has one end connected to the DC charging port and the other end connected to the bridge converter, 7. The energy conversion device of claim 6, wherein the third switch has one end connected to the AC charging port and the other end connected to the motor coil, and the fourth switch has one end connected to the AC charging port and the other end connected to the bidirectional bridge.

8. The charging port includes an AC / DC charging port, and the switch module includes a third switch unit and a fourth switch unit; the third switch unit has one end connected to the AC / DC charging port and the other end connected to the motor coil; the fourth switch unit has one end connected to the AC / DC charging port and the other end connected to the bridge converter or the bidirectional bridge; when the fourth switch unit is connected to the bridge converter, the AC / DC charging port, the third switch unit, the fourth switch unit, the motor coil, and the bridge converter form a DC charging circuit or a DC discharging circuit for the battery; 6. The energy conversion device according to claim 5, wherein when the fourth switch unit is connected to the bidirectional bridge, the AC / DC charging port, the third switch unit, the fourth switch unit, the motor coil, the bridge converter, and the bidirectional bridge form an AC charging circuit or an AC discharging circuit for the battery.

9. the third switch unit includes a fifth switch having one end connected to the AC / DC charging port and the other end connected to the motor coil; The fourth switch unit includes a single-pole double-throw switch including one movable end and two fixed ends, the movable end being connected to the AC / DC charging port, one fixed end being connected to the bridge converter, and another fixed end being connected to the bidirectional bridge; or 9. The energy conversion apparatus of claim 8, wherein the fourth switch unit includes two switches, one switch having one end connected to the AC / DC charging port and the other end connected to the bridge converter, and another switch having one end connected to the AC / DC charging port and the other end connected to the bidirectional bridge.

10. a first capacitor connected in parallel with the bidirectional bridge; 2. The energy conversion device according to claim 1, wherein the AC charging circuit, the DC charging circuit, and the motor drive circuit share the first capacitor.

11. 7. The energy conversion apparatus of claim 6, wherein the switch module further comprises a fifth switch unit, one end of which is connected to the battery and the other end of which is separately connected to the bridge converter and the bidirectional bridge.

12. a bi-directional DC module including a first DC end and a second DC end, the first DC end being connected to the bi-directional bridge; 7. The energy conversion device according to claim 6, wherein the switch module further includes a sixth switch unit, one end of which is connected to the second DC end and the other end of which is connected to the battery.

13. The energy conversion device according to claim 12, wherein the bidirectional DC module further comprises a third DC end connected to a storage battery or an on-board discharge port.

14. 14. The energy conversion device according to claim 13, wherein the bidirectional DC module includes a first converter, a second converter, a third converter and a transformer unit, a primary side, a first secondary side and a second secondary side of the transformer unit are respectively connected to the first converter, the second converter and the third converter, the first converter is connected in parallel to the bidirectional bridge, the second converter is connected in parallel to the battery, and the third converter is connected in parallel to the storage battery or the on-board discharge port.

15. The energy conversion device according to claim 14 , wherein the third converter includes a first sub-converter and a second sub-converter, both of which are connected to the second secondary side of the transformer unit.

16. the bidirectional DC module includes a first DC / DC conversion circuit and a second DC / DC conversion circuit; the first DC / DC conversion circuit has one end connected to the bidirectional bridge and the other end connected to the sixth switch unit; The energy conversion device according to claim 12 , wherein the second DC / DC conversion circuit has one end connected to the bidirectional bridge and the other end connected to a storage battery.

17. The bridge converter includes: a three-phase bridge including a first power switch unit and a second power switch unit connected in series, a third power switch unit and a fourth power switch unit connected in series, and a fifth power switch unit and a sixth power switch unit connected in series; a first end of the first power switch unit, a first end of the third power switch unit, and a first end of the fifth power switch unit are commonly connected to form a positive side of the bridge converter connected to a positive side of the bidirectional bridge; a second end of the second power switch unit, a second end of the fourth power switch unit, and a second end of the sixth power switch unit are commonly connected to configure a negative side of the bridge converter connected to a negative side of the bidirectional bridge; 2. The energy conversion device according to claim 1, wherein a connection point between the second end of the first power switch unit and the first end of the second power switch unit is connected to a first phase coil of the motor coil, a connection point between the second end of the third power switch unit and the first end of the fourth power switch unit is connected to a second phase coil of the motor coil, and a connection point between the second end of the fifth power switch unit and the first end of the sixth power switch unit is connected to a third phase coil of the motor coil.

18. 2. The energy conversion apparatus of claim 1, wherein the bidirectional bridge includes a seventh power switch unit and an eighth power switch unit connected in series, a first end of the seventh power switch unit is a positive side of the bidirectional bridge, a second end of the eighth power switch unit is a negative side of the bidirectional bridge, and a connection point between the second end of the seventh power switch unit and the first end of the eighth power switch unit is a midpoint of the bidirectional bridge.

19. an inductor having one end connected to the charging port and another end connected to the motor coil; the charging port, the inductor, the motor coil, and the bridge converter form a DC charging circuit for the battery; 2. The energy conversion device according to claim 1, wherein the charging port, the inductor, the motor coil, the bridge converter, and the bidirectional bridge form an AC charging circuit for the battery.

20. The energy conversion device according to any one of claims 1 to 19, comprising a control module, the energy conversion device comprising: a motor including a motor coil; a motor control module including a bridge converter connected to one end of the motor coil, the other end of the motor coil being connected to an external charging port; an on-vehicle charging module including a bidirectional bridge, the bidirectional bridge being connected in parallel with the bridge converter to form a first common connection end and a second common connection end, the first common connection end being connected to one end of an external battery, the second common connection end being connected to the other end of the battery, and the charging port being connected to the second common connection end and the bidirectional bridge; 1. A power system comprising: a DC charging circuit for an external battery, the DC charging circuit being configured with a charging port, the motor coil, and the bridge converter; an AC charging circuit for an external battery being configured with a charging port, the motor coil, the bridge converter, and the bidirectional bridge; and a motor driving circuit being configured with the motor coil, the bridge converter, and an external battery, the DC charging circuit, the AC charging circuit, and the driving circuit sharing the motor coil and the bridge converter.

21. A vehicle comprising the power system of claim 20.

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