High-power direct-current charging seat

Abstract

The utility model discloses a high-power direct-current charging seat which comprises a direct-current charging socket arranged at the front end of a charging box body, the direct-current charging socket is connected with a direct-current bus cathode and a direct-current bus anode, and the direct-current bus cathode and the direct-current bus anode respectively lead out two cathode direct-current buses and two anode direct-current buses through copper bars. The direct-current bus is connected with a direct-current bus cathode cable gland and a direct-current bus anode cable gland respectively, and the direct-current bus cathode cable gland and the direct-current bus anode cable gland are used for being connected with a high-voltage junction box and connected with a power battery through the high-voltage junction box; a low-voltage communication interface of the direct-current charging socket is connected with a low-voltage communication port arranged on the rear side of the charging box body, the low-voltage communication port is used for being externally connected with a battery management system, and the battery management system is connected with the high-voltage junction box and the power battery through a CAN bus. According to the utility model, the charging time can be obviously shortened, and the working efficiency of a mine is greatly improved; and after-sales maintenance of the product is facilitated.

Description

Technical Field

[0001] This utility model relates to the fields of audio and intelligent computing technology, specifically, it is a high-power DC charging dock. Background Technology

[0002] As the capacity of power batteries for pure electric mining trucks continues to increase, the pain point of slow charging for pure electric mining trucks is also being magnified.

[0003] Currently, most pure electric mining trucks require at least one hour to charge from zero to 80%, significantly impacting mine operational efficiency. Therefore, a high-current fast-charging solution for pure electric mining trucks has become an urgent problem to solve. Utility Model Content

[0004] To address the aforementioned technical problems, the purpose of this utility model is to provide a high-power DC charging base that can efficiently and quickly recharge the large-capacity power batteries on pure electric mining trucks, thereby greatly improving the operational efficiency of mines.

[0005] The present invention solves the above problems through the following technical solution:

[0006] A high-power DC charging socket includes: a charging box body, a detachable DC charging socket extending through the front end of the charging box body, the DC charging socket being connected to the negative and positive terminals of a DC bus inside the charging box body, two negative DC buses and two positive DC buses being led out from the negative and positive copper busbars respectively, and the negative and positive DC buses being connected to the negative and positive DC busbar glands respectively located on the rear side of the charging box body; and a low-voltage communication interface of the DC charging socket being connected to a low-voltage communication port located on the rear side of the charging box body.

[0007] As a further improvement, the front side of the charging box body is provided with an openable front panel to cover the DC charging socket.

[0008] As a further improvement, the front panel is provided with a pull-type latch to facilitate opening and closing of the front panel.

[0009] As a further improvement, a top cover is fixed to the top of the charging case body by screws;

[0010] And / or an explosion-proof valve is provided on the left or right side of the charging box body.

[0011] As a further improvement, the negative DC bus and the negative terminal of the DC bus are connected to the negative copper busbar by bolts;

[0012] And / or the positive DC bus and the positive terminal of the DC bus are connected to the positive copper busbar by bolts.

[0013] As a further improvement, the negative copper busbar and the positive copper busbar are mounted on the charging box bracket inside the charging box body through the negative insulating post and the positive insulating post; a PE grounding wire is also fixed on the charging box bracket.

[0014] As a further improvement, the negative DC bus includes a first negative DC bus and a second negative DC bus that are parallel to each other; the positive DC bus includes a first positive DC bus and a second positive DC bus that are parallel to each other.

[0015] As a further improvement, the bolts connecting the negative pole of the DC bus to the negative copper busbar and the negative copper busbar to the second negative DC busbar are also connected to the first negative insulating post and the second negative insulating post of the negative insulating post, respectively.

[0016] As a further improvement, the bolts connecting the positive copper busbar to the positive DC busbar, the first positive DC busbar, and the second positive DC busbar are also respectively connected to the second positive insulating post, the first positive insulating post, and the third positive insulating post.

[0017] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0018] This utility model of a high-power DC charging base can significantly shorten charging time and greatly improve the operational efficiency of mines. It features a simple structure with a pull-type latch on the front panel for easy operation. The power socket terminals of the DC charging socket can be individually disassembled for convenient after-sales maintenance. A vent valve on one side of the charging box acts as an explosion-proof valve to balance the internal air pressure, preventing accidental thermal runaway and potential explosion, effectively solving charging safety issues. The copper busbars for charging are arranged in a staggered manner, simultaneously meeting the requirements for creepage distance and clearance in installation and electrical performance. Attached Figure Description

[0019] Figure 1 This is a front axial view of the overall structure of a high-power DC charging base according to this utility model;

[0020] Figure 2 This is an axial view of the overall rear structure of a high-power DC charging base according to this utility model;

[0021] Figure 3 This is a partial structural diagram of the charging port of a high-power DC charging dock according to this utility model;

[0022] Figure 4 This is a schematic diagram of the internal structure of a high-power DC charging base according to the present invention;

[0023] Figure 5 This is a schematic diagram of the DC bus negative pole structure in this utility model;

[0024] Figure 6 This is a schematic diagram of the positive terminal structure of the DC bus in this utility model;

[0025] Figure 7 This is an electrical schematic diagram of a high-power DC charging base according to the present invention.

[0026] Figure label:

[0027] 1. Charging box body; 2. Front panel; 2-1. Straight pull type latch; 3. Top cover; 4. Explosion-proof valve; 5. DC bus positive gate; 6. DC bus negative gate; 7. Low voltage communication port; 8. DC charging socket; 9. DC bus negative terminal; 9-1. First negative DC bus; 9-2. Second negative DC bus; 9-3. Negative copper busbar; 9-4. First negative insulating post; 9-5. Second negative insulating post; 10. DC bus positive terminal; 10-1. First positive DC bus; 10-2. Second positive DC bus; 10-3. Positive copper busbar; 10-4. First positive insulating post; 10-5. Second positive insulating post; 10-6. Third positive insulating post; 11. PE grounding wire. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Example

[0030] See attached document Figure 1-7 A high-power DC charging socket includes: a charging box body 1, with a detachable DC charging socket 8 extending through the front end of the charging box body 1. The DC charging socket 8 is connected to the negative terminal 9 and the positive terminal 10 of the DC bus inside the charging box body. The negative terminal 9 and the positive terminal 10 of the DC bus are respectively led out through a negative copper busbar 9-3 and a positive copper busbar 10-3, with the negative and positive DC busbars respectively connected to the negative and positive DC busbar glands 6 and 5 located on the rear side of the charging box body. The low-voltage communication interface of the DC charging socket 8 is connected to the low-voltage communication port 7 located on the rear side of the charging box body 1.

[0031] A front panel 2, which can be opened and closed, is located on the front side of the charging box body to cover the DC charging socket 8. The rear side of the charging box body has a DC bus positive gland 5, a DC bus negative gland 6, and a low-voltage communication port 7. The DC charging socket 8 is connected to a 120mm² DC bus negative terminal 9 and a 120mm² DC bus positive terminal 10. The 120mm² DC bus negative terminal 9 has two 70mm² negative DC bus lines led out through a negative copper busbar 9-3, namely the first negative DC busbar 9-1 and the second negative DC busbar 9-2. The first negative DC busbar 9-1 and the second negative DC busbar 9-2 are connected to the DC bus negative gland 6. The negative copper busbar 9-3 is fixed to the charging box bracket through a first negative insulating post 9-4 and a second negative insulating post 9-5. The charging box bracket is located inside the charging box body.

[0032] Preferably, an explosion-proof valve 4 is also provided on the left or right side of the charging box body 1.

[0033] Two 70mm² positive DC busbars are led out from the positive copper busbar 10-3 of the 120mm² DC busbar positive terminal 10, namely the first positive DC busbar 10-1 and the second positive DC busbar 10-2. The first positive DC busbar 10-1 and the second positive DC busbar 10-2 are connected to the positive DC busbar gland 5. The positive copper busbar 10-3 is fixed to the charging box bracket through the first positive insulating post 10-4, the second positive insulating post 10-5 and the third positive insulating post 10-6. The charging box bracket is also fixed with a PE grounding wire 11, which is connected to the sheet metal box.

[0034] The power socket terminal of the DC charging socket 8 can be disassembled separately for easy after-sales maintenance; preferably, in this embodiment, the power socket terminal is detachably mounted on the charging box body by screws or bolts.

[0035] Preferably, the front panel 2 is equipped with a pull-type latch 2-1 for easy opening and closing of the front panel; the top cover 3 is fixed to the top of the charging box body with screws, and the high-voltage cable is opened during installation for easy installation and subsequent maintenance.

[0036] Specifically, the negative terminal 9 of the 120mm² DC bus is shunted via the negative copper busbar 9-3, resulting in the first negative DC busbar 9-1 (70mm²) and the second negative DC busbar 9-2 (70mm²); the positive terminal 10 of the 120mm² DC busbar is shunted via the positive copper busbar 10-3, resulting in the first positive DC busbar 10-1 (70mm²) and the second positive DC busbar 10-2 (70mm²).

[0037] During charging, the low-voltage communication interfaces S+, S-, A+, A-, CC1, and CC2 of the DC charging socket 8 are connected to the low-voltage communication port 7. Through the low-voltage communication port 7, the battery management system is connected to the battery management system. The battery management system is connected to the high-voltage junction box via a CAN bus and controls the charging relay in the high-voltage junction box to close and start charging. At the same time, the battery management system is connected to the power battery via a CAN bus, and the power battery is connected to the high-voltage junction box. The battery management system constantly monitors the power battery voltage, charging current, temperature, SOC, fault information, etc. After charging is completed, the battery management system controls the charging relay in the high-voltage junction box to disconnect from the charging box body.

[0038] In one specific embodiment, other models of the DC bus negative terminal 9 and DC bus positive terminal 10 can be selected to meet user needs. This application does not impose any restrictions on this. One end of the DC bus negative terminal 9 is connected to the power socket terminal of the DC charging socket 8, and the other end is flat and used to connect to the straight part of the negative copper bus 9-3 by bolts. The straight part of the negative copper bus 9-3 is connected to the second negative DC bus 9-2 by bolts. The bolts connecting the DC bus negative terminal 9 to the negative copper bus 9-3 and the negative copper bus 9-3 to the second negative DC bus 9-2 are also connected to the first negative insulating post 9-4 and the second negative insulating post 9-5, respectively, to reduce current loss and installation steps through common bolt connections. The bent part of the negative copper bus 9-3 is connected to the first negative DC bus 9-1 by bolts, and the first negative DC bus 9-1 and the second negative DC bus 9-2 are arranged in parallel.

[0039] One end of the positive DC bus 10 is connected to the power socket terminal of the DC charging socket 8, and the other end is flat and used to connect to the connection part of the positive copper bus 10-3 by bolts. The straight part of the positive copper bus 10-3 is connected to the first positive DC bus 10-1 and the second positive DC bus 10-2 by bolts, and the first positive DC bus 10-1 and the second positive DC bus 10-2 are arranged in parallel. The bolts connecting the positive copper bus 10-3 to the positive DC bus 10, the first positive DC bus 10-1 and the second positive DC bus 10-2 are also connected to the second positive insulating post 10-5, the first positive insulating post 10-4 and the third positive insulating post 10-6 respectively, so as to reduce current loss and reduce installation steps by connecting them with common bolts.

[0040] When charging with a single gun, by matching a liquid-cooled charging pile, the commonly available 200A charging current can be increased to 400A, equivalent to a two-gun charging solution on the market. This significantly reduces the charging time of pure electric mining vehicles and greatly improves the operational efficiency of mines. Similarly, as needed, the charging box can be expanded to a dual-gun 800A charging solution, i.e., equipped with two DC charging sockets 8 with power plug terminals. The principle is the same as in this application, equivalent to a four-gun charging solution on the market.

[0041] This utility model of a high-power DC charging base can significantly shorten charging time and greatly improve the operational efficiency of mines. It features a simple structure with a pull-type latch on the front panel for easy operation. The power socket terminals of the DC charging socket can be individually disassembled for convenient after-sales maintenance. A vent valve on one side of the charging box acts as an explosion-proof valve to balance the internal air pressure, preventing accidental thermal runaway and potential explosion, effectively solving charging safety issues. The copper busbars for charging are arranged in a staggered manner, simultaneously meeting the requirements for creepage distance and clearance in installation and electrical performance.

[0042] Although the present invention has been described herein with reference to illustrative embodiments, the above embodiments are merely preferred embodiments of the present invention, and the implementation of the present invention is not limited to the above embodiments. It should be understood that those skilled in the art can design many other modifications and implementations, which will fall within the scope and spirit of the principles disclosed in this application.

Claims

1. A high-power DC charging dock, characterized in that, include: The charging box body has a detachable DC charging socket at its front end. This socket connects to the negative and positive terminals of the DC bus inside the charging box body. Two negative and two positive DC bus lines are led out from the negative and positive copper busbars, respectively. These lines connect to the negative and positive DC bus glands located at the rear of the charging box body. These glands connect to the high-voltage junction box, which in turn connects to the power battery. The low-voltage communication interface of the DC charging socket connects to a low-voltage communication port located at the rear of the charging box body. This port connects to the battery management system, which in turn connects to the high-voltage junction box and the power battery via a CAN bus.

2. The high-power DC charging dock according to claim 1, characterized in that, The charging box body has an openable front panel that can cover the DC charging socket.

3. A high-power DC charging dock according to claim 2, characterized in that, The front panel is equipped with a pull-type latch to facilitate opening and closing of the front panel.

4. A high-power DC charging dock according to claim 1, characterized in that, The top cover of the charging box is fixed with screws. And / or an explosion-proof valve is provided on the left or right side of the charging box body.

5. A high-power DC charging dock according to any one of claims 1-4, characterized in that, The negative DC bus and the negative terminal of the DC bus are connected to the negative copper busbar by bolts; And / or the positive DC bus and the positive terminal of the DC bus are connected to the positive copper busbar by bolts.

6. A high-power DC charging dock according to claim 5, characterized in that, The negative copper busbar and the positive copper busbar are mounted on the charging box bracket inside the charging box body via negative and positive insulating posts.

7. A high-power DC charging dock according to claim 6, characterized in that, The negative DC bus includes a first negative DC bus and a second negative DC bus that are parallel to each other; the positive DC bus includes a first positive DC bus and a second positive DC bus that are parallel to each other.

8. A high-power DC charging dock according to claim 7, characterized in that, The bolts connecting the negative pole of the DC bus to the negative copper busbar and the negative copper busbar to the second negative DC busbar are also respectively connected to the first negative insulating post and the second negative insulating post of the negative insulating post.

9. A high-power DC charging dock according to claim 7, characterized in that, The bolts connecting the positive copper busbar to the positive terminal of the DC bus, the first positive DC bus, and the second positive DC bus are also respectively connected to the second positive insulating post, the first positive insulating post, and the third positive insulating post.

10. A high-power DC charging dock according to claim 6, characterized in that, The charging box bracket is also fixed with a PE grounding wire.

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