A dual charging interface for electric trucks

Abstract

This utility model discloses a dual charging interface for electric trucks, comprising a fast charging interface assembly and a supercharging interface assembly installed on the vehicle body. The fast charging interface assembly is connected to the power battery via a fast charging relay in the PDU of a multi-function controller, enabling the multi-function controller to control the fast charging interface assembly to charge the power battery. The supercharging interface assembly is connected to the power battery via a battery pack fast charging relay, which in turn is connected to the BMS, enabling the BMS to control the supercharging interface assembly to charge the power battery. When a supercharging station is available, the supercharging interface of the supercharging interface assembly can be used for charging. When no supercharging station is available, two fast charging stations can be used, with the charging guns of the two fast charging stations inserted into the fast charging station and the supercharging station respectively. In this case, the BMS allocates the charging power of the two fast charging stations, thereby achieving a supercharging effect. Based on this, large-scale supercharging of electric trucks can be achieved. Of course, fast charging of electric trucks can also be achieved using only the fast charging interface assembly.

Description

Technical Field

[0001] This utility model relates to electric truck charging interfaces, and more particularly to a dual charging interface for electric trucks. Background Technology

[0002] Electric vehicle charging interfaces are an important component of electric vehicle charging systems, primarily used to transfer electrical energy from the grid to the electric vehicle's battery. Currently, fast charging stations are widespread, with a typical single-gun power of 120kW, and electric truck charging interfaces are also mostly fast charging interfaces. However, supercharging stations are still very scarce, making it difficult to achieve widespread supercharging of electric trucks to improve charging efficiency. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a dual charging interface for electric trucks to solve the technical problem that existing technologies cannot achieve large-scale overcharging of electric trucks.

[0004] The objective of this utility model is achieved through the following technical solution: An electric truck has a dual charging interface, comprising a fast charging interface assembly and a supercharging interface assembly installed on the vehicle body. The fast charging interface assembly is connected to the power battery via a fast charging relay of the PDU in a multi-function controller, enabling the multi-function controller to control the fast charging interface assembly to charge the power battery. The supercharging interface assembly is connected to the power battery via a battery pack fast charging relay, which is connected to the BMS, enabling the BMS to control the supercharging interface assembly to charge the power battery.

[0005] Furthermore, the supercharging interface assembly is mounted on the fast charging interface bracket II, the fast charging interface bracket II is mounted on the left side of the vehicle body rear mounting plate assembly, the fast charging interface assembly is mounted on the fast charging interface bracket, and the fast charging interface bracket is mounted on the right side of the vehicle body rear mounting plate assembly.

[0006] Furthermore, a supercharging symbol is provided near the supercharging interface of the supercharging interface assembly.

[0007] Furthermore, the charging cable between the supercharging interface assembly and the battery pack fast charging relay is a 95 square millimeter silicone high-voltage wire.

[0008] Furthermore, the charging guidance circuit of the fast charging interface assembly is the charging guidance circuit of national standard GB / T 18487.1-2023, and the charging guidance circuit of the supercharging interface assembly is the charging guidance circuit of national standard GB / T 20234.3-2024.

[0009] The beneficial effects of this utility model are: The dual charging interface for electric trucks proposed in this utility model allows for charging using only the supercharging interface of the supercharging interface assembly when a supercharging station is available. When no supercharging station is available, two fast charging stations can be used, with the charging guns of the two fast charging stations inserted into the supercharging interface assembly and the fast charging interface assembly respectively. In this case, the BMS allocates the charging power of the two fast charging stations, thereby achieving the supercharging effect. Based on this, large-scale supercharging of electric trucks can be realized. Of course, fast charging of electric trucks can also be achieved by using only the fast charging interface assembly.

[0010] The supercharging interface can be distinguished by setting a supercharging mark near the supercharging interface of the supercharging interface assembly.

[0011] The charging cable between the supercharging interface assembly and the battery pack fast charging relay uses a 95 square millimeter silicone high-voltage wire, which is low in cost.

[0012] The charging guidance circuit of the fast charging interface assembly adopts the charging guidance circuit of national standard GB / T 18487.1-2023, and the charging guidance circuit of the supercharging interface assembly adopts the charging guidance circuit of national standard GB / T 20234.3-2024, which can be compatible with existing public DC charging piles.

[0013] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0014] To make the objectives, technical solutions, and advantages of this utility model clearer, the following will describe this utility model in further detail with reference to the accompanying drawings, wherein: Figure 1 This is a perspective view of the present utility model.

[0015] Figure 2 for Figure 1 Enlarged schematic diagram of part A in the middle.

[0016] Figure 3 This is a perspective view of the present invention from another angle.

[0017] Figure 4 for Figure 3 Enlarged schematic diagram of section B in the middle.

[0018] Figure 5 This is a circuit diagram of the present invention (only the parts related to the present invention are shown in the figure).

[0019] In the diagram: 1. Fast charging interface assembly; 2. Supercharging interface assembly; 3. Fast charging interface bracket; 4. Right side of the rear mounting plate assembly; 5. Left side of the rear mounting plate assembly; 6. PDU fast charging relay; 8. Battery pack fast charging relay. Detailed Implementation

[0020] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be understood that the preferred embodiments are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0021] Example 1 like Figure 1 The electric truck shown has a dual charging interface, comprising a fast charging interface assembly 1 and a supercharging interface assembly 2. The fast charging interface assembly 1 is mounted on a fast charging interface bracket 3 and secured with M6X25 hexagonal flange bolts, applying a torque of 9-12 N·m. The supercharging interface assembly 2 is mounted on a fast charging interface bracket II 4 and secured with M6X25 hexagonal flange bolts, applying a torque of 9-12 N·m. Fast charging interface bracket 3 and fast charging interface bracket II 4 are essentially identical and are existing technologies. Fast charging interface bracket 3 is mounted on the right side 5 of the rear mounting plate assembly of the vehicle body suspension and secured with M8X20 hexagonal flange bolts, applying a torque of 22-30 N·m. Fast charging interface bracket II 4 is mounted on the left side 6 of the rear mounting plate assembly of the vehicle body suspension and secured with M8X20 hexagonal flange bolts, applying a torque of 22-30 N·m. The fast charging interface bracket 3, fast charging interface bracket II 4, and the rear mounting plate assembly of the vehicle body suspension form a rigid connection to ensure strength. Fast charging interface assembly 1 is existing technology. Its charging guidance circuit conforms to the national standard GB / T 18487.1-2023 and includes a fast charging interface. Supercharging interface assembly 2 is also existing technology. Its charging guidance circuit conforms to the national standard GB / T 20234.3-2024 and includes a supercharging interface. A supercharging indicator is located near the supercharging interface to distinguish it. Fast charging interface assembly 1 connects to the power battery via the fast charging relay 8 of the PDU in the multi-function controller, enabling the multi-function controller to control the charging of the power battery. This is existing technology. The multi-function controller includes a PDU (high-voltage distribution box), BMS (battery management system), VCU (vehicle control unit), and BCM (body control module), which are also existing technologies. The supercharging interface assembly 2 is connected to the power battery via the battery pack fast-charging relay 9. The battery pack fast-charging relay 9 is connected to the BMS, enabling the BMS to control the supercharging interface assembly 2 to charge the power battery. This is existing technology. The battery pack fast-charging relay 9 is integrated into the power battery's internal BDU, which is also existing technology. The charging cable between the supercharging interface assembly and the battery pack fast-charging relay 9 is a 95-square-millimeter silicone high-voltage wire, connected using ultrasonic welding, resulting in low cost.

[0022] The innovation of this solution lies in the integration of the supercharging interface assembly 2 and the fast charging structure assembly 1, specifically including the combination of the supercharging interface and the fast charging interface, as well as the parallel connection of the supercharging circuit and the fast charging circuit on both sides of the power battery.

[0023] The dual charging interface for electric trucks proposed in this utility model allows for charging using only the supercharging interface of supercharging interface assembly 2 when a supercharging station is available. When no supercharging station is available, two fast charging stations can be used, with their charging guns inserted into supercharging interface assembly 2 and fast charging interface assembly 1 respectively. The BMS then allocates the charging power between the two fast charging stations, achieving a supercharging effect. This enables large-scale supercharging of electric trucks. Alternatively, fast charging can be achieved using fast charging interface assembly 1 alone. The charging guidance circuit of fast charging interface assembly 1 adopts the charging guidance circuit of national standard GB / T 18487.1-2023, and the charging guidance circuit of supercharging interface assembly 2 adopts the charging guidance circuit of national standard GB / T 20234.3-2024, ensuring compatibility with existing public DC charging stations.

[0024] The dual charging interface for electric trucks proposed in this utility model: 1. When charging with a single gun, the vehicle will enter the corresponding state after charging is completed, depending on the vehicle's power mode. 2. When switching from single-gun to dual-gun charging, the charging process is not interrupted. The charging power requested from the charging station is allocated autonomously by the BMS. (1) When A gun (supercharging interface) enters the charging process first and B gun (fast charging interface) enters later, the fast charging relay 8 in the multi-in-one controller closes; (2) When gun B (fast charging interface) enters the charging process first, and gun A (supercharging interface) enters later, the battery pack fast charging relay 9 closes; 3. Dual-gun charging becomes single-gun charging (1. Single-gun abnormal termination, 2. Manual termination of dual-gun charging to single-gun charging) During charging, the remaining single gun continues the charging process.

[0025] The charging strategies for gun A (supercharging interface) and gun B (fast charging interface) are also existing technologies. They involve pre-charging to bring the power battery to a high voltage state, and then closing the corresponding fast charging relay after the pre-charging is completed.

[0026] This solution enables single charging with gun A (supercharging interface), single charging with gun B (fast charging interface), and hybrid dual charging with gun A+B. It satisfies the requirement of achieving a power output of 240kW when only fast charging stations are available, or using single gun A charging when only supercharging stations are available.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of this technical solution, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A dual charging interface for an electric truck, characterized in that: It includes a fast charging interface assembly (1) and a supercharging interface assembly (2) installed on the vehicle body. The fast charging interface assembly (1) is connected to the power battery through the fast charging relay (8) of the PDU in the multi-in-one controller, so that the fast charging interface assembly (1) can be controlled by the multi-in-one controller to charge the power battery. The supercharging interface assembly (2) is connected to the power battery through the battery pack fast charging relay (9), and the battery pack fast charging relay (9) is connected to the BMS, so that the supercharging interface assembly (2) can be controlled by the BMS to charge the power battery.

2. The dual charging interface for electric trucks according to claim 1, characterized in that: The supercharging interface assembly (2) is mounted on the fast charging interface bracket II (4), the fast charging interface bracket II (4) is mounted on the left side (6) of the vehicle body rear mounting plate assembly, the fast charging interface assembly (1) is mounted on the fast charging interface bracket (3), and the fast charging interface bracket (3) is mounted on the right side (5) of the vehicle body rear mounting plate assembly.

3. The dual charging interface for electric trucks according to claim 1 or 2, characterized in that: The supercharging interface assembly (2) has a supercharging symbol near the supercharging interface.

4. The dual charging interface for electric trucks according to claim 1, characterized in that: The charging cable between the supercharging interface assembly (2) and the battery pack fast charging relay (9) is a 95 square millimeter silicone high-voltage cable.

5. The dual charging interface for electric trucks according to claim 1, characterized in that: The charging guide circuit of the fast charging interface assembly (1) is the charging guide circuit of GB / T 18487.1-2023, and the charging guide circuit of the supercharging interface assembly (2) is the charging guide circuit of GB / T 20234.3-2024.

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