A charging pile multi-protocol compatible power dynamic distribution cabinet

Abstract

The utility model discloses a kind of charging pile multi-protocol compatible power dynamic allocation cabinet, it is related to power distribution technical field, including cabinet and built-in power distribution assembly.Door body inboard is equipped with distribution box, communication component and transmission box, bottom is equipped with extension line and charging plug.Power distribution assembly is by from top to bottom arrangement's modularization direct-current power supply unit, equalization submodule, branch current detection component and branch fuse component, power supply unit output is distributed to each branch after being converged by direct-current bus bar;Side configuration protocol adaptation machine, and with communication component, power supply unit and transmission box electric connection, to realize multiple direct-current charging protocol identification and power scheduling;Cabinet upper sidewall is equipped with heat dissipation port to form convection passage;The distribution cabinet can be compatible with multiple protocols, support the dynamic power distribution of multiple load, with modularization maintenance convenient, protection perfect and heat dissipation and the like characteristics.

Description

Technical Field

[0001] This utility model relates to the field of power distribution technology, and more specifically to a power dynamic distribution cabinet for charging piles that is compatible with multiple protocols. Background Technology

[0002] Existing DC fast charging systems have many protocol types and large differences in interfaces. They often use fixed power or fixed ratio allocation methods, which makes it difficult to dynamically adjust according to vehicle demand in multi-gun concurrent scenarios, resulting in low equipment utilization and unstable charging time.

[0003] Existing charging equipment, such as application number CN201510124712.9, 'Matrix Flexible Charging Stack and Charging Method for Dynamic Power Allocation', divides the charging module into a fixed power area and a dynamic power area for power allocation. However, it does not integrate multi-protocol adaptation for the cabinet structure and the power distribution / transmission layout on the door side, making it difficult to meet the requirements of fine-grained dynamic power allocation and convenient maintenance for each branch in multi-protocol concurrent scenarios. Utility Model Content

[0004] The purpose of this utility model is to provide a multi-protocol compatible dynamic power allocation cabinet for charging piles in order to solve the above-mentioned technical problems.

[0005] To achieve the above objectives, this utility model specifically adopts the following technical solution: This utility model proposes a multi-protocol compatible dynamic power distribution cabinet for charging piles, including a cabinet body, a heat dissipation vent, and a power distribution assembly disposed inside the cabinet body. A power distribution box, a communication component, and a power transmission box are fixed on the inner side of the front door. The communication component is located in the area above the power distribution box and the power transmission box. An extension line is provided on the lower inner side of the front door, and its free end is connected to the charging plug and suspended in the lower section of the door body. The power distribution assembly is provided from top to bottom as a modular DC power supply unit, an equalization submodule, a branch current detection component and a branch fuse. The output of the modular DC power supply unit is distributed to each branch after being combined by the DC bus assembly. A protocol adapter is installed on one side of the power distribution assembly. The protocol adapter is electrically connected to the communication component, the modular DC power supply unit and the power transmission box, respectively, and is used to identify and adapt different charging protocols and issue power distribution commands. The heat dissipation vent is formed on the upper side wall of the cabinet and is used to form a convection heat dissipation channel with the internal cavity of the cabinet. The output of the power distribution box is led to the charging plug via an extension line to enable DC charging output for external electric vehicles.

[0006] As a preferred technical solution of this utility model, the modular DC power supply unit is a multi-layer vertically stacked drawer-type structure, with guide rails along the front and rear direction of the cabinet to achieve quick plugging and unplugging and maintenance; the input end of each power supply unit is connected to the distribution box, and the output end is connected in parallel to the DC bus assembly.

[0007] As a preferred technical solution of this utility model, the equalization submodule is connected in parallel between each branch and interacts with the protocol adapter to actively equalize the voltage / current between branches when multiple loads are working at the same time, so as to realize the dynamic distribution of power in the cabinet.

[0008] As a preferred embodiment of this utility model, the branch current detection component is installed in the conductive circuit between the DC bus component and the branch fuse, and its detection signal is sent to the protocol adapter for branch status identification and power scheduling.

[0009] As a preferred technical solution of this utility model, the branch circuit fuse is set at the bottom layer of the power distribution assembly, located in the series position of each circuit's external output, and is used to provide single-circuit protection in case of overcurrent or short circuit. A maintenance space or drawer is provided below the fuse for replacement.

[0010] The beneficial effects of this utility model are as follows: Through the collaboration of protocol adapters and communication components, the system automatically identifies and adapts to various DC charging protocols, improving compatibility. Utilizing branch current detection and balancing submodules, it performs real-time monitoring and active balancing of each branch, achieving dynamic power allocation on demand and improving overall cabinet power utilization and concurrent charging stability. The power unit adopts a drawer-type modular structure with rail mounting, facilitating quick plugging and unplugging and maintenance, and reducing downtime. Fuses are connected in series at each output, working with detection signals to achieve single-path protection and fault isolation, ensuring high safety. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the power distribution assembly structure of this utility model.

[0012] Reference numerals: 1. Power distribution assembly; 2. Heat dissipation vent; 3. Distribution box; 4. Communication component; 5. Transmission box; 6. Extension cable; 7. Charging plug; 11. Modular DC power supply unit; 12. Equalization submodule; 13. Branch current detection component; 14. Branch fuse; 15. Protocol adapter; 16. DC bus assembly. Detailed Implementation Example 1

[0013] like Figures 1 to 2As shown, this embodiment of a charging pile multi-protocol compatible dynamic power distribution cabinet includes a floor-standing metal cabinet and a front door. A heat dissipation vent 2 is provided on the upper side wall of the cabinet, forming an upward convection channel within the interior cavity. From top to bottom, a distribution box 3, a communication component 4, and a power transmission box 5 are fixed to the inside of the front door. A storage component is provided at the bottom of the door for winding an extension cable 6, the front end of which is connected to a charging plug 7. A power distribution assembly 1 is installed inside the cabinet. The front of the power distribution assembly 1 has a frame, within which, from top to bottom, are: a modular DC power supply unit 11, an equalization submodule 12, a branch current detection component 13, and a branch fuse 14. The modular DC power supply unit 11 adopts a drawer-type structure, with multiple layers stacked vertically. The guide rails along the front and rear directions allow for quick plug-and-play maintenance. Its AC input is introduced through the distribution box 3 on the door, and its DC output is connected to the DC bus assembly 16 located at the top of the assembly. The DC bus assembly 16 consists of positive and negative busbars, fixed to the cabinet frame by insulating supports, and distributes power to each branch. A protocol adapter 15 is installed on one side of the power distribution assembly 1. The protocol adapter 15 exchanges data with the communication component 4, interacts with the modular DC power supply unit 11 for start / stop and power command, and interacts with the transmission box 5 for charging permission, pre-charging, and contactor control logic. The transmission box 5 contains a DC contactor, a pre-charging circuit, and necessary relay terminals, with its output fixedly connected to the extension line 6. A branch current detection component 13 is arranged in the conductive circuit between the DC bus assembly 16 and the branch fuse 14 to obtain the current of each branch. Each external output circuit has a branch fuse 14 connected in series, with reserved maintenance space below the fuse for easy replacement.

[0014] Preferably, the communication component 4 is an integrated human-machine interface module with display, parameter setting, and local emergency stop functions; a filter or fan can be installed at the heat dissipation vent 2 to enhance ventilation. This embodiment can be configured with one or more external DC output channels, with the same structure and control logic.

[0015] The working principle of this utility model is as follows: The mains power enters the cabinet through the circuit breaker and surge protection of the distribution box 3 to power the control circuit and the modular DC power supply unit 11. The protocol adapter 15 and the communication component 4 complete self-testing, display the overall status, and the DC contactor is open with no power at the output. When the charging plug 7 is connected to the vehicle interface and communication is established, the protocol adapter 15 automatically identifies the DC charging protocol of the connected vehicle based on the message characteristics, completes handshake and parameter negotiation, obtains the target voltage, current and maximum power requirements, and displays them on the communication component 4. The protocol adapter 15 sends a pre-charge command to the power distribution box 5, and the pre-charge circuit is connected first to suppress surges. After the bus voltage reaches the set threshold, the DC contactor is closed to form the main circuit conduction.

[0016] The protocol adapter 15 allocates output power to the modular DC power supply unit 11 based on the vehicle's real-time demand and the current detection data of each branch. When multiple branches are running concurrently, the equalization submodule 12 actively balances the voltage / current of each branch, allowing high-load branches to receive more power and low-load branches to receive less power, thereby achieving dynamic distribution of total power among the branches and improving the overall cabinet utilization and charging stability. The branch current detection component 13 continuously transmits the sampled values ​​back to the protocol adapter 15 for overcurrent, abnormal contact resistance, temperature rise, and other detections. When the current exceeds the set threshold, the protocol adapter 15 issues a load reduction or disconnection command. If necessary, the corresponding branch fuse 14 is blown to achieve single-circuit isolation without affecting the operation of other branches. The communication component 4 synchronously records and prompts fault information. When the vehicle application ends or the power reaches the target, the protocol adapter 15 issues a current reduction and stop command to control the modular DC power supply unit 11 to gradually reduce the output, then disconnects the DC contactor and removes the pre-charge circuit. After the output voltage drops to a safe range, the charging gun can be removed. The system returns to standby mode.

[0017] The control method of this utility model is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the field. Since this utility model is mainly used to distribute power, the control method and circuit connection will not be explained in detail.

[0018] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0019] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A multi-protocol compatible dynamic power distribution cabinet for charging piles, comprising a floor-standing metal cabinet with a front door, a heat dissipation vent (2), and a power distribution assembly (1) disposed inside the cabinet. Its features are, The inside of the front door is fixed with a power distribution box (3), a communication component (4) and a power transmission box (5). The communication component (4) is located in the area above the power distribution box (3) and the power transmission box (5). An extension line (6) is provided on the lower part of the inside of the front door, and its free end is connected to a charging plug (7) and suspended on the lower part of the door. The power distribution assembly (1) is provided with a modular DC power supply unit (11), an equalization sub-module (12), a branch current detection component (13) and a branch fuse (14) from top to bottom. The output of the modular DC power supply unit (11) is distributed to each branch after being combined by the DC bus assembly (16). A protocol adapter (15) is provided on one side of the power distribution assembly (1). The protocol adapter (15) is electrically connected to the communication component (4), the modular DC power supply unit (11), and the power transmission box (5) respectively. It is used to identify and adapt different charging protocols and issue power distribution instructions. The heat dissipation vent (2) is formed on the upper side wall of the cabinet and is used to form a convection heat dissipation channel with the inner cavity of the cabinet; The output of the power supply box (5) is led to the charging plug (7) through the extension line (6) to realize DC charging output for external electric vehicles.

2. The charging pile multi-protocol compatible power dynamic allocation cabinet according to claim 1, characterized in that, The modular DC power supply unit (11) is a multi-layer vertically stacked drawer-type structure with guide rails along the front and rear direction of the cabinet to enable quick plugging and maintenance; the input end of each power supply unit is connected to the distribution box (3), and the output end is connected to the DC bus assembly (16).

3. The charging pile multi-protocol compatible power dynamic allocation cabinet according to claim 1, characterized in that, The equalization submodule (12) is connected in parallel between each branch and interacts with the protocol adapter (15) to actively equalize the voltage / current between branches when multiple loads are working at the same time, so as to realize the dynamic distribution of power in the cabinet.

4. The charging pile multi-protocol compatible power dynamic allocation cabinet according to claim 1, characterized in that, The branch current detection component (13) is set in the conductive circuit between the DC bus assembly (16) and the branch fuse (14), and its detection signal is sent to the protocol adapter (15) for branch status identification and power scheduling.

5. A charging pile multi-protocol compatible dynamic power allocation cabinet according to claim 1, characterized in that, The branch circuit fuse (14) is located at the bottom layer of the power distribution assembly (1), in series with each circuit output, and is used for single-circuit protection in case of overcurrent or short circuit. There is a maintenance space or drawer below the fuse for replacement.

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