Low-voltage power supply system and vehicle having the same

Abstract

A low-voltage power supply system and a vehicle having the same are disclosed. The low-voltage power supply system includes a storage battery, an electric control panel, a control circuit, a MOS transistor, and a battery management system, the electric control panel is connected to the storage battery, and at least a battery management controller and a motor control module are integrated in the electric control panel, the motor control module controls a power module, the control circuit is connected to the battery management controller and receives a control command from the battery management controller, the MOS transistor is connected to the control circuit, the battery management system is provided with a contactor, the MOS transistor is connected to the contactor and is attached to the electric control panel or the battery management system, and the battery management controller realizes on / off of the storage battery and the contactor by controlling on / off of the MOS transistor via the control circuit.

Description

[Technical field]

[0001] The present invention relates to the field of vehicles, in particular to a low voltage power supply system and a vehicle having same.

[0002] (CROSS REFERENCE TO RELATED APPLICATIONS) This disclosure claims priority to China Patent Application No. 202122068389.1, entitled “Low-Voltage Power Supply System and Vehicle Having the Same,” filed with the China National Intellectual Property Office on August 28, 2021, the entire contents of which are incorporated herein by reference. [Background technology]

[0003] The low-voltage power supply system in the related art usually includes a storage battery and a low-voltage distribution box, and a relay is provided in the low-voltage distribution box to control the on-off of the circuit, so that the low-voltage power supply system has a relatively complex structure, a large volume, and is inconvenient to arrange. Summary of the Invention [Problem to be solved by the invention]

[0004] The present disclosure aims to solve at least one of the technical problems in the prior art. To this end, a first object of the present disclosure is to provide a low-voltage power supply system having advantages such as higher integration and smaller volume.

[0005] The present disclosure further provides a vehicle having the above-described low-voltage power supply system. [Means for solving the problem]

[0006] In order to achieve the above object, a low-voltage power supply system according to an embodiment of the first aspect of the present disclosure includes a storage battery, an electrical control panel, a control circuit, a MOS transistor, and a battery management system, the electrical control panel is connected to the storage battery and has at least a battery management controller and a motor control module integrated therein, the motor control module controls a power module, the control circuit is connected to the battery management controller and receives a control command from the battery management controller, the MOS transistor is connected to the control circuit, the battery management system is provided with a contactor, the MOS transistor is connected to the contactor and is attached to the electrical control panel or the battery management system, and the battery management controller realizes on / off of the storage battery and the contactor by controlling on / off of the MOS transistor via the control circuit.

[0007] The low-voltage power supply system according to the embodiments of the present disclosure has advantages such as higher integration and smaller volume.

[0008] In some embodiments of the present disclosure, the battery management system further includes a processor, the processor being coupled to the contactor and controlling opening and closing of the contactor.

[0009] In some embodiments of the present disclosure, the control circuit and the MOS transistor are both integrated in the electric control panel, and a vehicle control unit is integrated in the electric control panel.

[0010] In some embodiments of the present disclosure, the low-voltage power supply system further includes an OBC module, a DC module, a high-voltage distribution module, and an electrical control box, wherein the OBC module has one end connected to a charging port and the other end connected to a power battery, the DC module has one end connected to the OBC module and the power battery, respectively, and the other end connected to the storage battery, the high-voltage distribution module has one end connected to the power battery and the other end connected to a high-voltage device, the electrical control box includes an upper cavity and a lower cavity, the high-voltage distribution module, the electrical control panel, and the power module are provided in the upper cavity, and the OBC module and the DC module are provided in the lower cavity.

[0011] In some embodiments of the present disclosure, the low-voltage power supply system further includes a low-voltage distribution box, in which two fuses are provided, and the storage battery is connected to the DC module via one of the fuses, and is connected to the MOS transistor, the electrical control board, and the OBC module respectively via another fuse.

[0012] In some embodiments of the present disclosure, the low-voltage power supply system further includes a motor and a reducer, the motor being connected to the reducer, the motor and the reducer being arranged side by side below the electrical control box, and the power module being connected to the motor to drive the motor.

[0013] In some embodiments of the present disclosure, the battery is integrated within the electrical control box.

[0014] In some embodiments of the present disclosure, the low-voltage power supply system further includes a control circuit board, the control circuit being mounted on the control circuit board, and the MOS transistor being integrated into the battery management system.

[0015] In some embodiments of the present disclosure, the control circuitry and MOS transistors are both integrated into the battery management system, and the storage battery is integrated within the electrical control box.

[0016] A vehicle according to an embodiment of the second aspect of the present disclosure includes the low-voltage power supply system according to the embodiment of the first aspect of the present disclosure.

[0017] A vehicle according to an embodiment of the second aspect of the present disclosure has advantages such as higher integration and smaller volume by utilizing the low-voltage power supply system described in the embodiment of the first aspect of the present disclosure.

[0018] Additional aspects and advantages of the disclosure will be set forth in part in the description that follows, and in part will be obvious from the description, or may be learned by practice of the disclosure. [Brief description of the drawings]

[0019] The above and / or additional aspects and advantages of the present disclosure will become more apparent and easier to understand by describing examples with reference to the following drawings, in which:

[0020] [Figure 1] FIG. 1 is a schematic diagram illustrating a MOS transistor of a low-voltage power supply system according to an embodiment of the present disclosure when the MOS transistor is mounted on an electric control panel. [Diagram 2] FIG. 11 is a schematic diagram illustrating a MOS transistor of a low-voltage power supply system according to another embodiment of the present disclosure, which is mounted on an electric control panel. [Diagram 3] FIG. 1 is a schematic diagram illustrating a configuration in which a MOS transistor of a low-voltage power supply system according to an embodiment of the present disclosure is mounted on a high-voltage control panel. [Figure 4] FIG. 11 is a schematic diagram illustrating a configuration in which a MOS transistor of a low-voltage power supply system according to another embodiment of the present disclosure is mounted on a high-voltage control panel. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] Hereinafter, the embodiments of the present disclosure will be described in detail, and examples of the embodiments are shown in the drawings, in which the same or similar reference numerals throughout represent the same or similar parts, or parts having the same or similar functions. The embodiments described below with reference to the drawings are illustrative and are merely for interpreting the present disclosure, and should not be understood as limiting the present disclosure.

[0022] In addition, in the description of the present disclosure, the orientations or positional relationships indicated by the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like are based on the orientations or positional relationships shown in the drawings, and are merely intended to easily explain and simplify the description of the present disclosure, and do not indicate or suggest that the illustrated devices or parts must have a specific orientation and be configured and operate in a specific orientation, and therefore should not be understood as limiting the present disclosure.

[0023] In the description of this disclosure, a "first feature" or a "second feature" may include one or more of such features.

[0024] In the description of this disclosure, "plurality" means two or more, and "several" means one or more.

[0025] Hereinafter, a low-voltage power supply system 1 according to an embodiment of the present disclosure will be described with reference to the drawings.

[0026] As shown in FIGS. 1 to 4, a low-voltage power supply system 1 according to an embodiment of the present disclosure includes a storage battery 100, an electric control panel 200, a control circuit 500, a battery management system 300, and a MOS transistor 400 (Metal-Oxide-Semiconductor Field-Effect Transistor, MOSFET).

[0027] The electric control panel 200 is connected to the storage battery 100, and at least a battery management controller (Battery Management Controller, BMC) and a motor control module are integrated in the electric control panel 200. The motor control module controls the power module. The control circuit 500 is connected to the battery management controller and receives a control command from the battery management controller. The MOS transistor 400 is connected to the control circuit 500. The battery management system 300 is provided with a contactor 321. The MOS transistor 400 is connected to the contactor 321 and is attached to the electric control panel 200 or the battery management system 300. The battery management controller realizes the on / off of the storage battery 100 and the contactor 321 by controlling the on / off of the MOS transistor 400 via the control circuit 500.

[0028] In addition, since the method of supplying power from the storage battery 100 to the battery management controller is a power controllable method, the battery management controller can have a sleep function, and the power consumed by the storage battery 100 in the sleep state is small. In addition, the contactor 321 may be a main positive contactor 321, a main negative contactor 321, a pre-charging contactor 321, etc.

[0029] According to the low-voltage power supply system 1 according to the embodiment of the present disclosure, the battery management controller is integrated into the electric control panel 200, so that the electric control panel 200 may be connected to the storage battery 100, and the battery management controller controls the MOS transistor via the control circuit to controllably supply power to the contactor. This eliminates the need to provide an additional chip to accommodate the battery management controller in the battery management system, thereby reducing the demand for chips and lowering costs.

[0030] In addition, a contactor 321 is attached to the battery management controller, and the storage battery 100 can supply power to the contactor 321 via a MOS transistor 400. The battery management controller controls the on / off of the MOS transistor 400 via a control circuit 500. When an abnormal situation occurs in the vehicle (for example, when the vehicle is crashed), the battery management controller collects an abnormality signal from the vehicle and controls the MOS transistor 400 to turn it off, thereby turning off the contactor 321 and cutting off the supply of high-voltage power to the vehicle, thereby improving the safety of the vehicle by avoiding self-combustion of the vehicle due to a short circuit in the high-voltage power output, or leakage of the high-voltage power output that could affect the safety of the driver and passengers.

[0031] Also, the MOS transistor 400 is mounted in the electrical control panel 200 or the battery management system 300 . Compared with the low-voltage power supply system in the related art that uses a relay to control the on / off of the storage battery and the contactor, the low-voltage power supply system 1 according to the embodiment of the present disclosure uses a MOS transistor 400 to control the on / off of the storage battery 100 and the contactor 321. Since the volume of the MOS transistor 400 is much smaller than that of a relay, the MOS transistor 400 may be mounted on a circuit board, without significantly increasing the vibration and noise of the circuit board, and reducing costs. The integration degree of the low-voltage power supply system 1 is higher, and the reliability of the electrical connection is guaranteed. The length of the conductor wires in the entire low-voltage power supply system 1 can be shortened, and the relay and the safety device (e.g., the fuse 820) connected between the relay and the electric control panel 200 can be omitted. Furthermore, the volume of the low-voltage power supply system 1 can be reduced, that is, the assembly space of the low-voltage power supply system 1 can be made smaller, and the arrangement of the low-voltage power supply system 1 can be made easier. Furthermore, the reduction in the volume of the low-voltage power supply system 1 can reduce the vibration amplitude and noise of the low-voltage power supply system 1 caused by the running of the vehicle, and improve the reliability of the electrical connection.

[0032] As a result, the low-voltage power supply system 1 according to the embodiment of the present disclosure has advantages such as higher integration, smaller volume and vibration amplitude, and more reliable electrical connection.

[0033] In some specific embodiments of the present disclosure, as shown in FIGS. 1 to 4, the battery management system 300 is further provided with a processor 310, which is connected to a contactor 321 and controls the opening and closing of the contactor 321.

[0034] When an abnormal situation occurs in the vehicle (e.g., during a collision), the processor 310 may control the contactor 321 to be turned off, and the battery management controller may control the MOS transistor 400 to be turned off via the control circuit 500. In either of the above two methods, there is no high voltage power output at the output terminal of the contactor 321, so the high voltage power of the vehicle can be turned off. The double mechanism setting greatly improves the safety of the vehicle.

[0035] In some specific embodiments of the present disclosure, a DC / DC converter 700 is connected between the battery 100 and the processor 310, as shown in FIGS.

[0036] In addition, the input voltage value of the processor 310 is generally 1.9V, 3.3V or 5V, the output voltage value of the storage battery 100 ranges from 9V to 16V, and the output voltage value of the storage battery 100 is generally 13.6V. Therefore, the output voltage value of the storage battery 100 is much larger than the input voltage value of the processor 310. The DC / DC converter 700 can convert the DC voltage output by the storage battery 100 into a smaller DC voltage, and the smaller DC voltage matches the input voltage value of the processor 310. Provided to The processor 310 may be powered and protected from being damaged.

[0037] In some specific embodiments of the present disclosure, as shown in Figures 1 to 4, the control circuit 500 and the MOS transistor 400 are both integrated in an electric control panel 200, and a vehicle control unit (VCU) is further integrated in the electric control panel 200. In this way, the transmission in which the battery management controller outputs a control command to the control circuit 500 is more stable and the signal reliability is higher. In addition, the degree of integration of the electric control panel 200 is higher, which is advantageous for reducing the number of conductors.

[0038] Specifically, the electrical control board includes a first core and a second core, the first core integrates a motor control module, and the second core integrates a vehicle control unit and a battery management controller.

[0039] In addition, by directly controlling the MOS transistor 400 with the battery management controller, the control failure rate of the vehicle can be significantly reduced. For example, in the related art, the battery management controller outputs a control command to the control circuit board 600, and the control circuit board 600 controls a relay to control the on / off of the contactor, so there are two related control boards. Assuming that the failure rate of the battery management controller is 10% and the failure rate of the control circuit board 600 is 10%, when the MOS transistor 400 is controlled by the control circuit board 600, the failure rate of the entire low-voltage power supply system 1 is 1-(1-10%)*(1-10%)=19%. However, in the present invention, by directly controlling the MOS transistor 400 with the battery management controller, the failure rate of the entire low-voltage power supply system 1 is 10%, that is, the failure rate of the entire low-voltage power supply system 1 is significantly reduced and the control reliability of the vehicle is greatly improved.

[0040] In some embodiments of the present disclosure, as shown in FIGS. 1 to 4, the low-voltage power supply system 1 further includes an OBC module 840, a DC module 810, a high-voltage power distribution module 930, and an electrical control box 900.

[0041] The OBC module 840 has one end connected to the charging port and the other end connected to the power battery, and the DC module 810 has one end connected to the OBC module 840 and the power battery, and the other end connected to the storage battery 100. The high-voltage power distribution module 930 has one end connected to the power battery and the other end connected to the high-voltage device. The electric control box 900 includes an upper cavity and a lower cavity, the high-voltage power distribution module 930, the electric control panel 200 and the power module are provided in the upper cavity, and the OBC module 840 and the DC module 810 are provided in the lower cavity.

[0042] The OBC module 840 is an on-board charger, and an external power source (e.g., a charging station) can charge the power battery through the OBC module 840, and the DC module 810 may be a DC / DC converter for converting the voltage of the power battery to a voltage of 9V to 16V to charge the storage battery 100. The high-voltage device may be an in-vehicle air conditioner, and the power battery supplies power to the high-voltage device through the high-voltage distribution module 930.

[0043] For example, the upper cavity may be divided into two layers, and both the electrical control panel 200 and the high-voltage power distribution module 930 are separated from the power module and located above the power module, thus avoiding the power module from affecting the signal control of the electrical control panel 200 and the high-voltage power distribution module 930.

[0044] In some embodiments of the present disclosure, as shown in FIG. 1, the low-voltage power supply system 1 further includes a low-voltage distribution box 830 .

[0045] Two fuses 820 are provided in the low voltage distribution box 830, and the storage battery 100 is connected to the DC module 810 via one fuse 820 and to the MOS transistors, electrical control board and OBC module via another fuse.

[0046] The two fuses 820 can cut off the connection between the storage battery 100 and the DC module 810, i.e., cut off the connection between the storage battery 100 and the power battery, in the event of a circuit failure (e.g., in the event of a voltage overload, current overload, or short circuit), thereby protecting the storage battery 100, the DC module 810, and the power battery from being damaged, while also cutting off the electrical connection between the storage battery 100 and the electrical control panel 200 and the OBC module, thereby protecting the storage battery 100, the electrical control panel 200, and the OBC module from being damaged.

[0047] Additionally, the low voltage distribution box 830 can provide mounting support and protection for two fuses 820, allowing the number of fuses 820 to be reduced.

[0048] 1 to 4, the low-voltage power supply system 1 may further include a motor 910 and a reducer 920, the motor 910 is connected to the reducer 920, the motor 910 and the reducer 920 are connected and arranged side by side below the electric control box 900, the power module is connected to the motor and drives the motor, and the motor 910 and the reducer 920 may be arranged coaxially. In this way, the volume of the low-voltage power supply system 1 is reduced, and the length of the conductors connecting the electric control box 900 to the motor 910 and the reducer 920 can be reduced, which is advantageous in improving the stability of the control signal.

[0049] According to some embodiments of the present disclosure, as shown in Figures 2 to 4, the storage battery 100 is integrated into the electrical control box 900, so that the electrical control box 900 can protect the storage battery 100 while reducing the length of the conductor wires. In this case, the fuse 820 is located in the electrical control box 900, and there is no need to provide a low-voltage distribution box 830, which further reduces the number of vehicle components, reduces the assembly space required for the low-voltage power supply system 1, and simplifies the circuit arrangement.

[0050] In some further embodiments of the present disclosure, as shown in FIG. 2, the low-voltage power supply system 1 further includes a control circuit board 600, which may be a Body Control Module (BCM).

[0051] The control circuit 500 is mounted on a control circuit board 600, and the MOS transistor 400 is integrated in the battery management system 300. The control circuit board 600 and the battery management controller communicate with each other, for example, the battery management controller makes the vehicle body control module send a control command to the MOS transistor 400 by a CAN message. In this way, the manner of providing the control circuit board 600 and the MOS transistor 400 is more diverse, and the volume of the battery management system 300 and the electric control panel 200 does not need to be increased.

[0052] In some embodiments of the present disclosure, as shown in Figures 2 to 4, both the control circuit 500 and the MOS transistor 400 are integrated in the battery management system 300. The battery management system 300 and the battery management controller can transmit signals to each other, and the battery management controller transmits a control command to the control circuit 500 via the processor 310 to control the on / off of the MOS transistor 400. In this way, since the battery management system 300 is highly integrated, circuits and wiring ports can be omitted, and the method of providing the control circuit 500 and the MOS transistor 400 is more diverse.

[0053] In addition, by integrating the storage battery 100 within the electrical control box 900, the electrical control box 900 can protect the storage battery 100 while reducing the length of the conductor wires; in this case, the fuse 820 is located within the electrical control box 900, and there is no need to provide a low-voltage distribution box 830, thereby reducing the number of vehicle parts, reducing the assembly space required for the low-voltage power supply system 1, and simplifying the circuit arrangement.

[0054] Hereinafter, a vehicle according to an embodiment of the present disclosure will be described with reference to the drawings. The vehicle includes the low-voltage power supply system 1 according to the embodiment of the present disclosure.

[0055] By utilizing the low-voltage power supply system 1 according to the embodiment of the present disclosure, the vehicle according to the embodiment of the present disclosure has advantages such as higher integration, smaller volume and vibration amplitude, and reliable electrical connection.

[0056] Other configurations and operations of the low-voltage power supply system 1 according to the embodiments of the present disclosure and the vehicle having the same are known to those skilled in the art and will not be described in detail herein.

[0057] In the present description, a description that refers to the term "specific example," "example," or the like means that the specific feature, structure, material, or characteristic described in combination with the example or example is included in at least one example or example of the present disclosure. In the present description, exemplary descriptions for the above terms do not necessarily refer to the same example or example.

[0058] Although embodiments of the present disclosure have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and objectives of the present disclosure, and that the scope of the present disclosure is limited by the claims and their equivalents. [Explanation of symbols]

[0059] 1. Low voltage power supply system 100 Battery 200 Electrical control panel 300 Battery Management System 310 Processor 321 Contactor 400 MOS Transistors 500 Control circuit 600 Control circuit board 700 DC / DC Converter 810 DC Module 820 Fuse 830 Low voltage distribution box 840 OBC Module 900 Electrical control box 910 Motor 920 reducer 930 High Voltage Power Distribution Module

Claims

1. The battery management system includes a storage battery, an electric control panel, a control circuit, a MOS transistor, and a battery management system. The electric control panel is connected to the storage battery, and at least a battery management controller and a motor control module are integrated in the electric control panel, and the motor control module controls the power module; The control circuit is connected to the battery management controller, and the control circuit receives a control command from the battery management controller; the MOS transistor is connected to the control circuit; a contactor is provided in the battery management system, the MOS transistor is connected to the contactor and is attached to the electrical control panel or the battery management system, and the battery management controller realizes on / off switching of the storage battery and the contactor by controlling on / off switching of the MOS transistor via the control circuit.

2. 2. The low-voltage power supply system according to claim 1, further comprising a processor in the battery management system, the processor being connected to the contactor and controlling opening and closing of the contactor.

3. The control circuit and the MOS transistor are both integrated in the electric control panel; 2. The low-voltage power supply system according to claim 1, wherein a vehicle control unit is integrated in the electric control panel.

4. further comprising an OBC module, a DC module, a high voltage power distribution module, and an electrical control box; One end of the OBC module is connected to a charging port, and the other end of the OBC module is connected to a power battery; One end of the DC module is connected to the OBC module and the power battery, and the other end of the DC module is connected to the storage battery; One end of the high voltage power distribution module is connected to the power battery, and the other end of the high voltage power distribution module is connected to a high voltage device; 2. The low-voltage power supply system of claim 1, wherein the electrical control box includes an upper cavity and a lower cavity, the high-voltage power distribution module, the electrical control panel and the power module are disposed in the upper cavity, and the OBC module and the DC module are disposed in the lower cavity.

5. Further comprising a low voltage distribution box; 5. The low-voltage power supply system according to claim 4, characterized in that two fuses are provided in the low-voltage distribution box, the storage battery is connected to the DC module via one fuse, and the storage battery is connected to the MOS transistor, the electrical control board, and the OBC module via another fuse of the two fuses, respectively.

6. 5. The low-voltage power supply system according to claim 4, further comprising a motor and a reducer, the motor being connected to the reducer, the motor and the reducer being arranged side by side below the electrical control box, and the power module being connected to the motor to drive the motor.

7. 5. The low-voltage power supply system according to claim 4, wherein the storage battery is integrated in the electrical control box.

8. Further comprising a control circuit board; 2. The low-voltage power supply system according to claim 1, wherein the control circuit is mounted on the control circuit board, and the MOS transistor is integrated into the battery management system.

9. 5. The low-voltage power supply system according to claim 4, wherein the control circuit and the MOS transistor are both integrated in the battery management system, and the storage battery is integrated in the electrical control box.

10. A vehicle comprising the low-voltage power supply system according to any one of claims 1 to 9.

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