All-in-one power supply and distribution system and vehicle

Abstract

The utility model discloses an all-in-one power supply and distribution system and a vehicle, and belongs to the field of vehicle power distribution. The system is connected with a power battery and comprises a fast charging interface, a high-voltage distribution box, a buck-boost DCDC converter, a low-voltage output interface and a high-voltage output interface, and the high-voltage distribution box is connected with the high-voltage output interface, the fast charging interface, the buck-boost DCDC converter and the power battery; and the buck-boost DCDC converter is connected with the power battery and the low-voltage output interface respectively. By means of the all-in-one power supply and distribution system, the function of converting 400V into 12V of a traditional electric vehicle is achieved, the function of boosting 400V to more than 800V to charge a power battery is also achieved, meanwhile, the integration degree is high, the size is reduced, and installation is convenient.

Description

Technical Field

[0001] The utility model belongs to the field of vehicle power distribution, and specifically relates to an all-in-one power supply and distribution system and a vehicle. Background Art

[0002] The current mainstream pure electric vehicle voltage platform is 400V, but concerns about charging speed and driving range have led to the rise of the 800V platform. Pure electric vehicles with an 800V voltage platform require superchargers with a voltage of around 1000V to fully utilize the advantages of super-fast charging.

[0003] However, the penetration rate of 1000V super charging piles is low, and the 800V voltage platform cannot be charged directly on the traditional 400V voltage platform charging piles.

[0004] The comparative document (CN118367454A) discloses a high-voltage distribution box, a control method and a vehicle. The high-voltage distribution box includes: a distribution box body, which is provided with a charging relay; an intelligent control module, which is installed in the distribution box body, and is provided with an MCU processing module, a voltage sampling module, a CAN communication module and a relay control module. The voltage sampling module is electrically connected to the contacts of the charging relay, and the MCU processing module is electrically connected to the voltage sampling module, the CAN communication module and the relay control module respectively. The MCU processing module judges the voltage signal transmitted by the received voltage sampling module and outputs a first judgment result. The MCU processing module controls the closing and opening of the charging relay based on the first judgment result. The above-mentioned high-voltage distribution box can prevent the distribution box or even the entire vehicle from being damaged due to aging of the charging relay contacts during the charging process, thereby improving the safety of the distribution box and the entire vehicle.

[0005] As with existing technology, when the high-voltage distribution box in the reference document is used on an 800V platform electric vehicle, if the previous 400V DC fast charging pile is to be used, an additional DC / DC converter must be added on the vehicle side to boost the voltage to 800V or above to charge the power battery. However, adding an additional DC / DC converter will increase the difficulty of vehicle layout. Utility Model Content

[0006] The present invention aims to overcome the deficiencies of the prior art and proposes an all-in-one power supply and distribution system and vehicle to achieve the following objectives: through the all-in-one power supply and distribution system of the present application, the function of converting 400V to 12V of a traditional electric vehicle and the function of boosting 400V to above 800V to charge the power battery are realized, while the integration is high and the volume is reduced for easy installation.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0008] An all-in-one power supply and distribution system connected to a power battery, the system comprising a fast charging interface, a high-voltage distribution box, a buck-boost DC-DC converter, a low-voltage output interface, and a high-voltage output interface, wherein the high-voltage distribution box is respectively connected to the high-voltage output interface, the fast charging interface, the buck-boost DC-DC converter, and the power battery; and the buck-boost DC-DC converter is respectively connected to the power battery and the low-voltage output interface.

[0009] Preferably, the high-voltage distribution box includes a main positive contactor and a main negative contactor, wherein one end of the main positive contactor or the main negative contactor is connected to the power battery, and the other end is respectively connected to the high-voltage output interface, fast charging interface, and buck-boost DCDC converter.

[0010] Preferably, the buck-boost DCDC converter includes a voltage input interface, a boost output interface, and a buck output interface, wherein the voltage input interface is connected to the high-voltage distribution box, the boost output interface is connected to the power battery, and the buck output interface is connected to the low-voltage output interface.

[0011] Preferably, the system further includes a fast charging positive contactor and a fast charging negative contactor, wherein the fast charging positive contactor or the fast charging negative contactor is connected in series between the fast charging interface and the high-voltage distribution box.

[0012] Preferably, the system further includes a slow charging interface and an on-board charger, wherein the slow charging interface is connected to the high-voltage distribution box through the on-board charger.

[0013] At the same time, the present application also proposes a vehicle, which includes the above-mentioned all-in-one power supply and distribution system, and also includes a front electric drive system, a first power supply and distribution system, a power battery, a vehicle control system, and a rear electric drive system, wherein the front electric drive system is connected to the first power supply and distribution system; the first power supply and distribution system is respectively connected to the power battery and the vehicle control system; the all-in-one power supply and distribution system is respectively connected to the power battery and the vehicle control system; the rear electric drive system is connected to the all-in-one power supply and distribution system.

[0014] Preferably, the power battery includes at least two high-voltage DC interfaces, one of which is connected to the all-in-one power supply and distribution system.

[0015] Preferably, the first power supply and distribution system includes a first high-voltage distribution box, a clutch controller, and a heater, wherein the first high-voltage distribution box is connected to the clutch controller, the heater, the front electric drive system, and the power battery respectively.

[0016] The technical effects of the utility model are:

[0017] (1) The all-in-one power supply and distribution system of the present application realizes the use of a main positive contactor and a main negative contactor to realize the use of a 400V charging pile on an 800V platform without adding any additional DCDC boost devices. Instead, an integrated buck-boost DCDC converter is used, which has high integration, reduced size, and is easy to install.

[0018] (2) The power battery of the present application is provided with at least two high-voltage DC interfaces, which has the advantage of facilitating high-voltage electricity consumption at the front and rear ends of the vehicle, and is suitable for various drive modes including pure electric two-wheel drive, pure electric four-wheel drive, extended-range two-wheel drive, and extended-range four-wheel drive. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a simplified structural diagram of an all-in-one power supply and distribution system according to an embodiment of the present utility model;

[0020] Figure 2 This is a circuit diagram of an all-in-one power supply and distribution system according to an embodiment of the present utility model;

[0021] Figure 3 This is a vehicle structure diagram of an embodiment of the present utility model. DETAILED DESCRIPTION

[0022] The following, with reference to the accompanying drawings, further illustrates the specific implementation methods of the present invention through the description of the embodiments. The purpose is to help those skilled in the art gain a more complete, accurate, and in-depth understanding of the utility model's concept and technical solution, and to facilitate its implementation. It should be noted that the terms "first" and "second" in this application are used only to facilitate the description of the technical solution to distinguish different components and are not intended to limit this application. To make the technical solution of the present invention more clear, the present invention is explained through the following embodiments.

[0023] An all-in-one power supply and distribution system connected to the power battery, such as Figure 1 As shown, the system includes a fast charging interface, a high-voltage power distribution box (PDU), a buck-boost DCDC converter, a low-voltage output interface, and a high-voltage output interface, wherein the high-voltage power distribution box is respectively connected to the high-voltage output interface, the fast charging interface, the buck-boost DCDC converter, and the power battery; the buck-boost DCDC converter is respectively connected to the power battery and the low-voltage output interface. At the same time, the system also includes a slow charging interface and an on-board charger (OBC), wherein the slow charging interface is connected to the high-voltage power distribution box through the on-board charger. In actual applications, the low-voltage output interface is generally connected to the battery to provide a low voltage of 12V, and the high-voltage output interface is generally connected to the vehicle's electric drive system to increase the high voltage electricity required by the electric drive system. The following is combined with Figure 2 This embodiment is further described.

[0024] In this embodiment, the high-voltage distribution box includes a main positive contactor and a main negative contactor, wherein one end of the main positive contactor or the main negative contactor (contact 1 of the main positive contactor or contact 2 of the main negative contactor) is connected to the power battery, and the other end (contact 2 of the main positive contactor or contact 1 of the main negative contactor) is respectively connected to the high-voltage output interface, fast charging interface, and buck-boost DCDC converter.

[0025] In this embodiment, the buck-boost DCDC converter includes a voltage input interface (IN1, IN2), a boost output interface (OT3, OT4), and a buck output interface (OT1, OT2), wherein the voltage input interface is connected to the high-voltage distribution box for receiving the charging voltage from the fast charging interface or the discharge voltage from the power battery. The boost output interface is connected to the power battery and can be used to boost the 400V charging voltage from the fast charging interface to 800V and then send it to the power battery. The buck output interface is connected to the low-voltage output interface and can be used to reduce the discharge voltage from the power battery to 12V and then send it to the low-voltage output interface to power the low-voltage system of the entire vehicle. Obviously, the buck-boost DCDC converter used in this embodiment is an integrated voltage converter that combines the boost and buck functions. When using a 400V DC fast charging pile, there is no need to add an additional DC / DC converter on the vehicle side for boosting, which improves the integration and reduces the volume, thereby reducing the cost and facilitating installation.

[0026] In this embodiment, the system also includes a fast charging positive contactor and a fast charging negative contactor, wherein the fast charging positive contactor or the fast charging negative contactor is connected in series between the fast charging interface and the high-voltage distribution box to isolate the fast charging interface from the high-voltage distribution box. The fast charging positive contactor and the fast charging negative contactor are only turned on when the vehicle is fast charging, and are not turned on in other cases, thereby protecting the circuit safety.

[0027] The working principle of this embodiment is as follows: when the power battery pack is discharging, the main positive / main negative contactors are closed, high voltage electricity enters from IN1 and IN2, and is output from OT1 and OT2 to power the low voltage battery; when using an 800V charging pile for charging, the buck-boost DCDC converter does not need to boost the voltage, and high voltage electricity enters the power battery pack from the fast charging gun through the main positive / main negative contactors for charging; when using a 400V charging pile to charge the car, the main positive / main negative contactors are disconnected, high voltage electricity enters from the fast charging gun, passes through IN1 and IN2, enters the buck-boost DCDC converter, boosts to 800V, and then enters the power battery pack through OT3 and OT4 for charging.

[0028] At the same time, the present application also proposes a vehicle, such as Figure 3As shown, the vehicle includes the above-mentioned all-in-one power supply and distribution system, and also includes a front electric drive system, a first power supply and distribution system, a power battery, a vehicle control system, and a rear electric drive system, wherein the front electric drive system is connected to the first power supply and distribution system; the first power supply and distribution system is respectively connected to the power battery and the vehicle control system; the all-in-one power supply and distribution system is respectively connected to the power battery and the vehicle control system; the rear electric drive system is connected to the all-in-one power supply and distribution system.

[0029] Furthermore, the power battery of the present application is provided with at least two high-voltage DC interfaces, which can be respectively provided at the front end and the rear end of the power battery pack. The advantage is that it facilitates the high-voltage power consumption at the front end and the rear end of the entire vehicle, thus being suitable for various driving forms such as pure electric two-wheel drive, pure electric four-wheel drive, extended-range two-wheel drive, and extended-range four-wheel drive.

[0030] Furthermore, the first power supply and distribution system includes a first high-voltage distribution box, a clutch controller (CCU), and a heater (PTC), wherein the first high-voltage distribution box is respectively connected to the clutch controller, heater, front electric drive system, and power battery, and is used to supply the high-voltage direct current output by the power battery to the clutch controller, heater, and front electric drive system, respectively.

[0031] The above description of the present invention is provided as an example, in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described method. Any non-substantial improvements made using the method concepts and technical solutions of the present invention, or any application of the above-described concepts and technical solutions of the present invention to other situations without modification, are all within the scope of protection of the present invention.

Claims

1. An all-in-one power supply and distribution system connected to a power battery, characterized by: The system includes a fast charging interface, a high-voltage distribution box, a buck-boost DCDC converter, a low-voltage output interface, and a high-voltage output interface, wherein the high-voltage distribution box is respectively connected to the high-voltage output interface, the fast charging interface, the buck-boost DCDC converter, and the power battery; the buck-boost DCDC converter is respectively connected to the power battery and the low-voltage output interface.

2. The all-in-one power supply and distribution system according to claim 1, characterized in that: The high-voltage distribution box includes a main positive contactor and a main negative contactor, wherein one end of the main positive contactor or the main negative contactor is connected to the power battery, and the other end is respectively connected to the high-voltage output interface, fast charging interface, and buck-boost DCDC converter.

3. The all-in-one power supply and distribution system according to claim 2, characterized in that: The buck-boost DCDC converter includes a voltage input interface, a boost output interface, and a buck output interface, wherein the voltage input interface is connected to the high-voltage distribution box, the boost output interface is connected to the power battery, and the buck output interface is connected to the low-voltage output interface.

4. The all-in-one power supply and distribution system according to claim 2, characterized in that: The system further includes a fast-charging positive contactor and a fast-charging negative contactor, wherein the fast-charging positive contactor or the fast-charging negative contactor is connected in series between the fast-charging interface and the high-voltage distribution box.

5. The all-in-one power supply and distribution system according to any one of claims 1 to 4, characterized in that: The system further includes a slow charging interface and an on-board charger, wherein the slow charging interface is connected to the high-voltage distribution box through the on-board charger.

6. A vehicle, characterized in that: The vehicle includes an all-in-one power supply and distribution system according to any one of claims 1 to 5, and also includes a front electric drive system, a first power supply and distribution system, a power battery, a vehicle control system, and a rear electric drive system, wherein the front electric drive system is connected to the first power supply and distribution system; the first power supply and distribution system is respectively connected to the power battery and the vehicle control system; the all-in-one power supply and distribution system is respectively connected to the power battery and the vehicle control system; and the rear electric drive system is connected to the all-in-one power supply and distribution system.

7. A vehicle according to claim 6, characterized in that: The power battery includes at least two high-voltage DC interfaces, one of which is connected to the all-in-one power supply and distribution system.

8. A vehicle according to claim 6 or 7, characterized in that: The first power supply and distribution system includes a first high-voltage distribution box, a clutch controller, and a heater, wherein the first high-voltage distribution box is connected to the clutch controller, the heater, the front electric drive system, and the power battery respectively.

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