Electric drive control system for vehicle, and vehicle

Abstract

The present disclosure relates to an electric drive control system (10) for a vehicle, the electric drive control system including: an inversion unit (1), which is capable of inverting high-voltage DC power output by an electrical energy storage apparatus of the vehicle into AC power that drives an electric motor; and a DC-DC conversion unit (2), which is capable of converting high-voltage DC power output by the electrical energy storage apparatus of the vehicle into low-voltage DC power for a low-voltage system of the vehicle to use, wherein the electric drive control system (10) includes a control module (3) that is jointly used by the inversion unit (1) and the DC-DC conversion unit (2) The present disclosure further relates to a vehicle that includes the electric drive control system (10) described above.

Description

[0001] Description

[0002] Electric drive control system for vehicle, and vehicle

[0003] Technical Field

[0004] The present disclosure relates to an electric drive control system for a vehicle, and a vehicle comprising such an electric drive control system.

[0005] Background Art

[0006] An electronic apparatus for electric drive control of a vehicle may comprise an inverter, a DC-DC converter, an onboard charger and a power distributor, etc. These electronic apparatuses are combined to form an electric drive control system of a vehicle. As vehicles gradually develop, the space inside vehicles is becoming ever more compact; electric drive control systems are subject to ever higher requirements in terms of becoming more lightweight, smaller, more integrated and multifunctional, and lower in cost.

[0007] In known solutions, various electronic apparatuses of an electric drive control system are typically integrated together to form an all-in-one product. Integration of electric drive control systems at present is mainly mechanical integration; that is, multiple electronic apparatuses are concentrated in space, so that multifunctionality and a reduced volume can be realized with a compact structure. However, only relying on mechanical integration, the electronic apparatuses of an electric drive control system are only arranged physically closely, but are still relatively independent functionally. Consequently, it is difficult to further increase the degree of integration of electric drive control systems, and component costs of electronic devices remain high.

[0008] Summary of the Invention

[0009] Thus, the present disclosure is intended to solve the abovementioned problem, having the objective of providing an electric drive control system for a vehicle. An electric drive control system according to the present disclosure is functionally iintegrated, able to further increase the degree of integration and reduce component costs.

[0010] The objective is achieved by means of an electric drive control system for a vehicle according to an embodiment of the present disclosure, the electric drive control system comprising an inversion unit, which is capable of inverting high-voltage DC power output by an electrical energy storage apparatus of the vehicle into AC power that drives an electric motor; and a DC-DC conversion unit, which is capable of converting high-voltage DC power output by the electrical energy storage apparatus of the vehicle into low-voltage DC power for a low-voltage system of the vehicle to use. The electric drive control system comprises a control module that is jointly used by the inversion unit and the DC-DC conversion unit.

[0011] The objective of the present disclosure lies in proposing an electric drive control system, which can be functionally integrated and reduce component costs. The electric drive control system according to the present disclosure comprises an inversion unit and a DC-DC conversion unit, and comprises a control module that is jointly used by the inversion unit and the DC-DC conversion unit. Compared with a mechanically integrated electric drive control system with electronic apparatuses that are functionally independent of each other, the inversion unit and the DC-DC conversion unit of the electric drive control system according to the present disclosure jointly use a control module, and are thus also functionally integrated, which can save on electronic element costs, and is further beneficial for reducing the overall dimensions of the electric drive control system.

[0012] The electric drive control system according to the present disclosure may further have one or more of the following features individually or in combination.

[0013] According to an embodiment of the present disclosure, the control module at least comprises a microcontroller. Thus, the inversion unit and the DC-DC conversion unit jointly use the microcontroller of the control module for control, and a microcontroller can be dispensed with. In addition, different function controls of the electric drive control system being executed by the same microcontroller can reduce vehicle architecture complexity and reduce software development workload.According to an embodiment of the present disclosure, the control module at least comprises a system basis chip, the system basis chip being capable of supplying power to an electronic device of the electric drive control system.

[0014] According to an embodiment of the present disclosure, the control module at least comprises a high-voltage interlock module.

[0015] According to an embodiment of the present disclosure, the control module at least comprises a circuit board temperature measurement module.

[0016] According to an embodiment of the present disclosure, the control module at least comprises a a power distribution unit.

[0017] According to an embodiment of the present disclosure, the control module at least comprises a wake-up module.

[0018] According to an embodiment of the present disclosure, the control module at least comprises a CAN transceiver.

[0019] According to an embodiment of the present disclosure, the control module at least comprises a low- voltage signal connector.

[0020] According to an embodiment of the present disclosure, the control module at least comprises a KL15 power supply circuit and a KL15 voltage measurement circuit of the vehicle.

[0021] According to an embodiment of the present disclosure, the control module at least comprises a low- voltage EMC filter circuit.

[0022] According to an embodiment of the present disclosure, the inversion unit, the DC-DC conversion unit and the control module are at least partially integrated on the same circuit board. Preferably, the inversion unit, the DC-DC conversion unit and the control module are at least partially integrated on the same circuit board.

[0023] According to an embodiment of the present disclosure, the electric drive control system further comprises an onboard charging unit, which is capable of converting high-voltage AC power into high-voltage DC power for charging the electrical energy storage apparatus.

[0024] According to an embodiment of the present disclosure, the onboard charging unit may be arranged on an individual circuit board.

[0025] The present disclosure further relates to a vehicle, which comprises theelectric drive control system described above.

[0026] Brief Description of the Drawings

[0027] The foregoing and other features and advantages of the present disclosure will become more apparent from the following detailed description of exemplary embodiments with reference to the drawings, and the description and the drawings are for illustrative purposes only and are not intended to limit the scope of the present disclosure in any way. The drawings below are not drawn to scale according to actual dimensions but rather focus on showing the main purpose of the present disclosure.

[0028] Fig. 1 is a schematic block diagram of an electric drive control system according to the present disclosure;

[0029] Fig. 2 shows a circuit board of the electric drive control system, and an inversion unit, a DC-DC conversion unit and a control module are integrated on this circuit board.

[0030] Detailed Description of Embodiments

[0031] To clarify the objective, technical solutions and advantages of embodiments of the present disclosure, the technical solutions of the embodiments of the present disclosure are described clearly and completely below in conjunction with the drawings of the embodiments of the present disclosure. It must be explained that the embodiments described are some, not all, of the embodiments of the present disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of the present disclosure without the need for inventive effort shall fall within the scope of protection of the present disclosure.

[0032] Unless defined otherwise, the technical or scientific terms used herein shall have the common meanings as understood by those of ordinary skill in the field to which the present disclosure belongs. Moreover, terms such as "a", "one" or "the" used in the description and claims of the patent application of the present disclosure do not indicate a quantity limit, but mean that there is at least one. Words such as "comprise" or "include" mean that the element or object appearing before the wordencompasses the elements or objects and their equivalents listed after the word, without excluding other elements or objects.

[0033] In order to facilitate description, the drawings of the present disclosure accordingly simplify or omit components commonly used in the art, such as external connection lines and other components that are irrelevant to the description of the present disclosure. These omitted or simplified components do not affect the understanding of the content of the present disclosure by a person skilled in the art.

[0034] An electric drive system of a vehicle comprises an electric motor, a gearbox and an electric drive control system. The electric motor converts electrical energy into mechanical energy to drive the vehicle to travel. The gearbox is mechanically coupled to the electric motor, and converts high-speed, low-torque rotation generated by the electric motor into low-speed, high-torque rotation. The electric drive control system comprises multiple electronic apparatuses such as an inverter, a DC-DC converter, an onboard charger and a power distributor. The inverter (INV) is used for inverting DC power output by an electrical energy storage apparatus (such as a battery or another electrical energy storage apparatus) of the vehicle into AC power that can drive the electric motor; the DC-DC converter can convert high-voltage DC power output by the electrical energy storage apparatus into low-voltage DC power that can be used by a low-voltage system of the vehicle; the onboard charger (OBC) can convert external AC power into DC power than can charge the electrical energy storage apparatus, or converts DC power output by the electrical energy storage apparatus into AC power that can be used externally; the power distributor can distribute power between different systems of the vehicle.

[0035] In a conventional new energy vehicle, the electronic apparatuses of the electric drive control system are provided independently of each other. That is, an inverter, a DC-DC converter, an onboard charger and a power distributor that are independent are provided; these electronic apparatuses can be mounted at different positions of the vehicle in a distributed manner. As requirements for the degree of integration of vehicles increase, it is already known to provide an all-in-one electric drive control system, physically integrating the electronic apparatuses; for example,multiple electronic apparatuses are accommodated in one housing, or a unifying design is applied to multiple housings respectively accommodating multiple electronic apparatuses. However, this type of simple physical integration has limited potential for increased efficiency with reduced costs, and already cannot cope with the demands of increasingly intense competition.

[0036] Hence, the electric drive control system 10 according to the present disclosure overcomes the limitation of physical integration, deeply integrating the electronic apparatuses functionally.

[0037] Referring to the schematic block diagram shown in Fig. 1, the electric drive control system 10 comprises an inversion unit 1, a DC-DC conversion unit 2, a control module 3 that is jointly used by the inversion unit 1 and the DC-DC conversion unit 2, and an onboard charger 4.

[0038] As shown in the figure, the inversion unit 1 is used for inverting high-voltage DC power output by an electrical storage apparatus of the vehicle into AC power that drives an electric motor, and comprises multiple modules such as a power module, an INV drive circuit, INV current detection, INV overvoltage / overcurrent / undervoltage and INV safety logic. The power module and the INV drive circuit of the inversion unit 1 belong to a high-voltage DC (HVDC) domain of the electric drive control system 10, used for inverting high-voltage DC power to AC power. INV current detection, INV overvoltage / overcurrent / undervoltage and INV safety logic form safety modules of the inversion unit 1, and belong to a low-voltage DC (LVDC) domain of the electric drive control system 10.

[0039] The DC-DC conversion unit 2 is used for converting high-voltage DC power output by the electrical energy storage apparatus into low- voltage DC power for a low- voltage system of the vehicle to use, and comprises multiple modules such as an HVDC connector, an HVDC filter, a transformer, a DC-DC drive circuit, DC-DC output filtering, DC-DC 12 V output, DC-DC overvoltage / overcurrent / undervoltage, DC-DC current detection and DC-DC safety logic. The HVDC connector and the HVDC filter of the DC-DC conversion unit 2 belong to the high-voltage DC (HVDC) domain of the electric drive controlsystem 10, used for connecting to the electrical storage apparatus to receive high-voltage DC power input; the transformer and the DC-DC drive circuit span the high-voltage DC (HVDC) domain and the low-voltage DC (LVDC) domain, used for transforming high-voltage DC power to low- voltage DC power; DC-DC output filtering and DC-DC overvoltage / overcurrent / undervoltage belong to the low-voltage DC (LVDC) domain, used for outputting low-voltage DC power to the low-voltage system of the vehicle; DC-DC current detection, DC-DC overvoltage / overcurrent / undervoltage and DC-DC safety logic form safety modules of the DC-DC conversion unit 2, and belong to the low-voltage DC (LVDC) domain of the electric drive control system 10.

[0040] Control of both the inversion unit 1 and the DC-DC conversion unit 2 is executed by the control module 3. The control module 3 as a whole belongs to the low- voltage DC (LVDC) domain of the electric drive control system 10, and comprises multiple modules such as a microcontroller, a system basis chip (SBC), a high-voltage interlock module, a circuit board temperature measurement module, a wake-up module, a CAN transceiver, a low- voltage signal connector, a KL15 power supply circuit, a KL15 voltage measurement circuit, a low- voltage EMC filter circuit and a power distribution unit.

[0041] Control logic of both the inversion unit 1 and the DC-DC conversion unit 2 is executed by the microcontroller of the control module 3. For example, the microcontroller communicates with INV current detection, INV overvoltage / overcurrent / undervoltage and INV safety logic, and controls execution of the power module of the inversion unit 1 by means of the INV drive circuit; furthermore, the microcontroller communicates with DC-DC current detection, DC-DC overvoltage / overcurrent / undervoltage and DC-DC safety logic, and controls transform execution of the DC-DC conversion unit 2 by means of the DC-DC drive circuit.

[0042] The system basis chip of the control module 3 is used for supplying power to an electronic element of the electric drive control system 10, comprising supplying power to an electronic element of the DC-DC conversion unit 2 and the inversion unit 1. The system basis chip may further integrate certain safety monitoring andcommunication functions.

[0043] The high-voltage interlock module of the control module 3 is used for measuring integrity and continuity of a high-voltage circuit in the electric drive control system 10 and / or another component of the vehicle, identifying abnormal disconnections of the high-voltage circuit, and promptly disconnects high-voltage input during a fault and maintenance. High-voltage interlock functions of both the inversion unit 1 and the DC-DC conversion unit 2 can be executed by means of the high-voltage interlock module of the control module 3.

[0044] The circuit board temperature measurement module of the control module 3 is used for measuring a temperature of a circuit board of the electric drive control system 10. A circuit board temperature of the inversion unit 1 and a circuit board temperature of the DC-DC conversion unit 2 may both be measured by means of the circuit board temperature measurement module of the control module 3.

[0045] The wake-up module of the control module 3 is used for waking up the electric drive control system 10 when asleep. Wake-up of both the inversion unit 1 and the DC-DC conversion unit 2 may be executed by the wake-up module of the control module 3.

[0046] The CAN transceiver and the low-voltage signal connector of the control module 3 are used for communication of the electric drive control system 10 and other systems of the vehicle. For example, communication of the microcontroller and an electronic control unit (ECU) of the vehicle is executed by means of the CAN transceiver and the low- voltage signal connector. Control instructions of the electronic control unit of the vehicle for both the inversion unit 1 and the DC-DC conversion unit 2 are transmitted by means of the CAN transceiver and the low-voltage signal connector, and information transmitted by the inversion unit 1 and the DC-DC conversion unit 2 to the electronic control unit of the vehicle is also transmitted by means of the CAN transceiver and the low- voltage signal connector.

[0047] The KL15 power supply circuit and the KL15 voltage measurement circuit of the control module 3 are used for KL15 signal power supply and measuring KL15 signals when the vehicle is started, thereby starting the electric drive control system 10. That is, starting of both the inversion unit 1 and the DC-DC conversion unit 2on the basis of the KL15 signal is executed by the control module 3.

[0048] The low- voltage EMC filter circuit of the control module 3 may provide EMC (electromagnetic compatibility) filtering for the electronic element of the control module 3 itself and electronic elements of the inversion unit 1 and the DC-DC conversion unit 2.

[0049] The power distribution unit of the control module 3 is used for distributing power between different systems of the vehicle. That is, the power distributor of the electric drive control unit may also be integrated in the control module 3.

[0050] Fig. 2 shows the inversion unit 1, the DC-DC conversion unit 2 and the control module 3 jointly integrated on the circuit board. As shown in the figure, the inversion unit 1 and the DC-DC conversion unit 2 are respectively arranged on two sides of the circuit board, and the control module 3 is arranged on a middle portion of the circuit board, thereby facilitating simultaneous control of the inversion unit 1 and the DC-DC conversion unit 2. In a conventional vehicle, an inverter and a DC-DC converter are respectively arranged on different circuit boards and comprise respective independent control elements. The inversion unit 1 and the DC-DC conversion unit 2 according to the present disclosure jointly use the control module 3, thereby dispensing with some electronic elements and saving on costs. In addition, compared with a total area of an inverter circuit board and a DC-DC converter circuit board, the shared circuit board of the present disclosure may have a smaller area, and reduces the space occupied by the electric drive control system 10 overall.

[0051] The electric drive control system 10 further comprises an onboard charging unit 4, used for receiving externally input AC power, and converting the AC power into DC power that can be used for charging the electrical energy storage apparatus, or may also convert DC power output by the electrical energy storage apparatus into AC power for external use. The onboard charging unit 4 spans the high-voltage AC (HVAC) domain and the high-voltage DC (HVDC) domain, and control thereof is provided by its own control element; for example, an OBC DSP shown in Fig. 1 can realize a function similar to the microcontroller of the control module 3. The onboard charging unit 4 may be arranged on an individual circuit board.According to another aspect of the present disclosure, a vehicle is provided, comprising the electric drive control system 10 as described above. The vehicle may be an electrified vehicle, such as a battery electric vehicle (BEV), a hybrid electric vehicle (HEV), a plug-in hybrid electric vehicle (PHEV), a range extended EV or a fuel cell electric vehicle (FCEV). The vehicle may also be a hydrogen-powered vehicle. Based on the above, the vehicle can realize the functions of the electric drive control system 10 described above, and has the advantages described above.

[0052] Certain features, structures or characteristics in one or more embodiments of the present disclosure may be combined appropriately.

[0053] The above is a description of the present disclosure and should not be regarded as a limitation thereof. Although some exemplary embodiments of the present disclosure have been described, those skilled in the art will readily understand that many modifications could be made to the exemplary embodiments without departing from the original teaching and advantages of the present disclosure. Therefore, all such modifications are intended to be included in the scope of the present disclosure as defined by the claims. It should be understood that the above is a description of the present disclosure, and the present disclosure should not be considered to be limited to the specific embodiments disclosed; moreover, modifications to the disclosed embodiments and other embodiments are intended to be included within the scope of the present disclosure.

Claims

Claims1. An electric drive control system (10) for a vehicle, characterized in that the electric drive control system (10) comprises:an inversion unit (1), which is capable of inverting high-voltage DC power output by an electrical energy storage apparatus of the vehicle into AC power that drives an electric motor;and a DC-DC conversion unit (2), which is capable of converting high-voltage DC power output by the electrical energy storage apparatus of the vehicle into low- voltage DC power for a low- voltage system of the vehicle to use, wherein the electric drive control system (10) comprises a control module (3) that is jointly used by the inversion unit (1) and the DC-DC conversion unit (2).

2. The electric drive control system (10) according to claim 1, characterized in thatthe control module (3) at least comprises a microcontroller.

3. The electric drive control system (10) according to claim 1, characterized in thatthe control module (3) at least comprises a system basis chip, the system basis chip being capable of supplying power to an electronic device of the electric drive control system (10).

4. The electric drive control system (10) according to claim 1, characterized in thatthe control module (3) at least comprises a high-voltage interlock module.

5. The electric drive control system (10) according to claim 1, characterized in thatthe control module (3) at least comprises a circuit board temperature measurement module.

6. The electric drive control system (10) according to claim 1, characterized in thatthe control module (3) at least comprises a power distribution unit.

7. The electric drive control system (10) according to claim 1, characterizedin thatthe control module (3) at least comprises a wake-up module.

8. The electric drive control system (10) according to claim 1, characterized in thatthe control module (3) at least comprises a CAN transceiver.

9. The electric drive control system (10) according to claim 1, characterized in thatthe control module (3) at least comprises a low-voltage signal connector.

10. The electric drive control system (10) according to claim 1, characterized in thatthe control module (3) at least comprises a KL15 power supply circuit and a KL15 voltage measurement circuit of the vehicle.

11. The electric drive control system (10) according to claim 1, characterized in thatthe control module (3) at least comprises a low-voltage EMC filter circuit.

12. The electric drive control system (10) according to any one of claims 1 to 11, characterized in thatthe inversion unit (1), the DC-DC conversion unit (2) and the control module (3) are at least partially integrated on the same circuit board.

13. The electric drive control system (10) according to any one of claims 1 to 11, characterized in thatthe electric drive control system (10) further comprises an onboard charging unit, which is capable of converting high-voltage AC power into high-voltage DC power for charging the electrical energy storage apparatus.

14. The electric drive control system (10) according to claim 13, characterized in thatthe onboard charging unit is arranged on an individual circuit board.

15. A vehicle, characterized in that the vehicle comprises the electric drive control system (10) according to any one of claims 1 to 14.

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