Charging device for power battery of mining heavy truck

Abstract

The utility model provides a charging device of a mining heavy truck power battery, the mining heavy truck power battery comprises a vehicle-mounted battery cluster and a DCDC corresponding to the battery cluster, the mining heavy truck power battery is connected with a mining truck load, the charging device comprises a rectifier bridge charging station and a liquid cooling charging gun, the rectifier bridge charging station is directly connected with an incoming line power supply and the liquid cooling charging gun, the incoming line power supply is converted into direct current through the rectifier bridge charging station, and the power battery of the heavy truck is charged through the liquid cooling charging gun. The adopted rectifier bridge charging station is simple in structure and simplified in circuit, DCDC is the existing equipment of the original truck, the cost is greatly reduced, the problem that more than 10 battery clusters and charging interfaces are needed between the original mining center truck and the charging station is solved, only 1-2 charging guns are used for connection, operation is easy and convenient, and the requirement for use under the field working condition is better met.

Description

Technical Field

[0001] This utility model relates to the field of charging device technology, and in particular to a charging device for a power battery of a mining heavy-duty truck. Background Technology

[0002] Heavy-duty mining trucks are heavy-duty dump trucks used in the mining and quarrying industries to complete tasks such as rock and soil stripping and ore transportation. They are key to the efficient and high-productivity operation of the mining and quarrying industries. In recent years, with the continuous development of new energy technologies, the use of new energy, especially electricity, in mining trucks has become increasingly widespread, and the development trend of pure electric mining trucks is becoming more and more obvious.

[0003] Heavy-duty mining trucks require significant power during daily operation. Therefore, when selecting power batteries, large-capacity, high-current, and high-voltage batteries must be considered. Generally, heavy-duty truck power batteries utilize multiple cells connected in series to achieve a high voltage, and cells connected in parallel to meet the demands of high-current charging and discharging and large-capacity energy storage. The total voltage of heavy-duty truck power batteries is often high, around DC 1000V, or even reaching DC 1500V, with a capacity exceeding 2 MW·h. This poses a risk of circulating current between batteries, potentially leading to thermal runaway. To facilitate maintenance and replacement, a single-cluster battery + DC-DC converter system architecture is now commonly used. See the instruction manual for details. Figure 1 However, this system architecture has the following problems:

[0004] 1. The battery design is complex and the cost is high;

[0005] Each battery cluster requires a charging interface and a charging socket. Vehicle batteries have limited space and take up space, and the added components result in high costs.

[0006] 2. The charging process is cumbersome and inconvenient for on-site use;

[0007] Each battery cluster requires one charging port. A heavy-duty truck battery often requires more than 10 battery clusters, which means more than 10 charging ports are needed. During charging, personnel need to operate multiple charging guns to charge the batteries.

[0008] 3. Charging piles are expensive.

[0009] Charging a single mining heavy-duty truck often requires 5 to 7 conventional charging stations, resulting in high overall costs. Utility Model Content

[0010] Given that the current conventional single-cluster battery + DC-DC system architecture of heavy-duty mining trucks has problems such as complex design, cumbersome operation and high cost, this utility model patent provides a charging device for the power battery of heavy-duty mining trucks, which can improve the charging efficiency of heavy-duty mining trucks and reduce the cost of charging equipment.

[0011] To achieve the above objectives, the embodiments of this utility model adopt the following technical solutions:

[0012] A charging device for a power battery of a mining heavy-duty truck, the power battery of the mining heavy-duty truck includes an on-board battery cluster and a corresponding DC-DC converter for the battery cluster. The power battery of the mining heavy-duty truck is connected to a mining truck load. The charging device includes a rectifier bridge charging station and a liquid-cooled charging gun. The rectifier bridge charging station is directly connected to the incoming power supply and the liquid-cooled charging gun. The incoming power supply is converted into DC power through the rectifier bridge charging station, and the heavy-duty truck power battery is charged through the liquid-cooled charging gun.

[0013] According to one aspect of the present invention, the power battery for mining heavy-duty trucks is further provided with a DC charging socket and a DC bus, wherein the DC charging socket is connected to the high-voltage side of the DC-DC converter via the DC bus.

[0014] According to one aspect of this utility model, the liquid-cooled charging gun is electrically connected to the DC charging socket during charging.

[0015] According to one aspect of the present invention, the power battery of a single mining heavy-duty truck is connected to up to two liquid-cooled charging guns during charging.

[0016] According to one aspect of this utility model, the incoming power supply is a three-phase AC 1140V alternating current.

[0017] According to one aspect of this utility model, the rectifier bridge charging station is further provided with a CAN interface, which is a vehicle serial communication protocol interface.

[0018] According to one aspect of this utility model, the power battery of the mining heavy-duty truck is connected to the vehicle serial communication protocol interface via VCU during charging.

[0019] According to one aspect of this utility model, both the vehicle battery pack and the DC-DC converter are connected to the VCU via a CAN bus.

[0020] According to one aspect of the present invention, a circuit breaker is further provided between the vehicle battery pack and the DC-DC converter.

[0021] According to one aspect of the present invention, the power battery for mining heavy-duty trucks includes at least two branch circuits with battery clusters connected in series, the battery clusters being disposed at the ends of the branch circuits, and each branch circuit having a single-cluster fuse.

[0022] Advantages of this utility model: This utility model provides a charging device for a mining heavy-duty truck power battery. The mining heavy-duty truck power battery includes an on-board battery cluster and a corresponding DC-DC converter. The mining heavy-duty truck power battery is connected to a mining truck load. The charging device includes a rectifier bridge charging station and a liquid-cooled charging gun. The rectifier bridge charging station is directly connected to the incoming power supply and the liquid-cooled charging gun. The rectifier bridge charging station converts the incoming power supply into DC power, and the liquid-cooled charging gun charges the heavy-duty truck power battery. The rectifier bridge charging station used has a simple structure and simplified circuitry, while the DC-DC converter is already present in the vehicle. This not only does not increase new costs but also reduces costs by more than 50% compared to national standard charging piles. Furthermore, it solves the problem of requiring more than 10 battery clusters and charging interfaces between the original mining truck and the charging station. This application only uses 1-2 charging guns for connection, making operation simple and convenient, and better meeting the needs of on-site working conditions. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a system architecture diagram of a traditional single-cluster battery + DC-DC converter mentioned in the background technology of this utility model;

[0025] Figure 2 This utility model relates to a charging device for a power battery in a mining heavy-duty truck, and an overall architecture diagram of the power battery and the truck load.

[0026] Figure 3 This is the internal equivalent circuit diagram of the rectifier bridge charging station of this utility model.

[0027] The names corresponding to the serial numbers in the diagram are as follows:

[0028] 1. Rectifier bridge charging station; 2. Liquid-cooled charging gun; 3. Mining truck load. Detailed Implementation

[0029] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] 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.

[0033] like Figure 2 , Figure 3 As shown, a charging device for a power battery of a mining heavy-duty truck is disclosed. The charging device is specifically a ground charging station, which is used to charge the power battery of the heavy-duty truck. The power battery of the heavy-duty truck is connected to a mining truck load 3. The main components of the power battery of the heavy-duty truck are an on-board battery cluster and a DC-DC converter corresponding to the battery cluster.

[0034] The charging device includes a rectifier bridge charging station 1 and a liquid-cooled charging gun 2. The rectifier bridge charging station 1 is directly connected to an input power supply, which is a three-phase AC 1140V AC power supply. After the input power supply is input into the rectifier bridge charging station 1, it is converted and output as DC 1162V DC power for charging the power battery of heavy-duty trucks.

[0035] The rectifier bridge charging station 1 is also directly connected to the liquid-cooled charging gun 2, which charges the heavy-duty truck's power battery. The liquid-cooled charging gun 2 is connected to the output end of the rectifier bridge charging station 1, and its input end receives DC 1162V direct current.

[0036] The power battery for mining heavy-duty trucks is also equipped with a DC charging socket and a DC bus. The DC charging socket is connected to the high-voltage side of the DC-DC converter via the DC bus. The liquid-cooled charging gun 2 is electrically connected to the DC charging socket during charging. After successful connection, the battery is charged on the high-voltage side of the DC-DC converter via the DC bus, and the on-board battery pack is charged through the DC-DC converter.

[0037] In practical applications, the power battery of a single mining heavy-duty truck is connected to at most two liquid-cooled charging guns 2 during charging, that is, only 1 to 2 charging guns are used to connect the mining heavy-duty truck and the charging station for charging.

[0038] To ensure the smooth progress of the charging process, the rectifier bridge charging station 1 is also equipped with a CAN interface, which is the vehicle serial communication protocol interface CANBUS. When the power battery of the mining heavy truck is charging, it is connected to the vehicle serial communication protocol interface CANBUS through the VCU.

[0039] In practical applications, before charging the power battery of mining heavy-duty trucks, it is also necessary to perform a communication handshake between the VCU and the rectifier bridge charging station 1 through the vehicle serial communication protocol interface CANBUS, that is, to perform a charging handshake protocol to ensure the compatibility between the charger (rectifier bridge charging station 1) and the charging equipment (power battery of mining heavy-duty trucks), and to ensure that the charger can provide power to the charging equipment in the best way.

[0040] The power battery for mining heavy-duty trucks includes at least two branch circuits with battery clusters connected in series. The battery clusters are located at the end of the branch circuits. In addition to the battery clusters, each branch circuit is equipped with a DC-DC converter, a single-cluster fuse, and a circuit breaker. The circuit breaker is located between the on-board battery clusters and the DC-DC converter.

[0041] The power battery for heavy-duty mining trucks in this embodiment includes n branch circuits, and its structure is as follows:

[0042] Cluster 1: Single-cluster fuses 1-4, DC-DC converters 1-3, circuit breakers 1-2, battery cluster 1-1;

[0043] Cluster 2: Single-cluster fuse 2-4, DC-DC converter 2-3, circuit breaker 2-2, battery cluster 2-1; ......

[0045] Cluster n: Single-cluster fuse n-4, DC-DC converter n-3, circuit breaker n-2, battery cluster n-1.

[0046] Circuit breakers are represented by QF, and single-cluster fuses are represented by FU.

[0047] All battery clusters and DC-DC converters on all branch circuits are connected to the VCU via the CAN bus. During the charging process, the VCU can monitor and manage parameters such as charging current and charging temperature in real time, and feed them back to the rectifier bridge charging station 1 for adjustment via the vehicle serial communication protocol interface CANBUS.

[0048] Advantages of this utility model: This utility model provides a charging device for a mining heavy-duty truck power battery. The mining heavy-duty truck power battery includes an on-board battery cluster and a corresponding DC-DC converter. The mining heavy-duty truck power battery is connected to a mining truck load 3. The charging device includes a rectifier bridge charging station 1 and a liquid-cooled charging gun 2. The rectifier bridge charging station 1 is directly connected to the incoming power supply and the liquid-cooled charging gun 2. The rectifier bridge charging station 1 converts the incoming power supply into DC power, and the liquid-cooled charging gun 2 charges the heavy-duty truck power battery. The rectifier bridge charging station 1 has a simple structure and simplified circuit, while the DC-DC converter is already in the vehicle. This not only does not increase the cost but also reduces the cost by more than 50% compared to the national standard charging pile. It also solves the problem that the original mining central truck required more than 10 battery clusters and charging interfaces to connect to the charging station. This application only uses 1 to 2 charging guns for connection, which is simple and convenient to operate and better meets the needs of on-site working conditions.

[0049] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A charging device for a mine heavy truck power battery, the mine heavy truck power battery comprising an on-board battery cluster and a DCDC corresponding to the battery cluster, the mine heavy truck power battery being connected with a mine truck load (3), characterized in that, The charging device comprises a rectifier bridge charging station (1) and a liquid-cooled charging gun (2), the rectifier bridge charging station (1) is directly connected with an incoming power supply and the liquid-cooled charging gun (2), the incoming power supply is converted into direct current through the rectifier bridge charging station (1), and the heavy truck power battery is charged through the liquid-cooled charging gun (2).

2. The charging device for a power battery of a mine heavy truck according to claim 1, characterized in that, The mine heavy truck power battery is also provided with a direct current charging socket and a direct current bus, and the direct current charging socket is connected to the high-voltage side of the DCDC through the direct current bus.

3. The charging device of a power battery of a mine heavy truck according to claim 2, characterized in that, The liquid-cooled charging gun (2) is electrically connected with the direct current charging socket during charging.

4. The charging device for a power battery of a mine heavy truck according to claim 3, characterized in that, The single power battery of the mine heavy truck is connected with at most two liquid-cooled charging guns (2) during charging.

5. The charging device for a power battery of a mine heavy truck according to claim 1, characterized in that, The incoming power supply is three-phase AC 1140V alternating current.

6. The charging device for a power battery of a mine heavy truck according to claim 1, characterized in that, The rectifier bridge charging station (1) is also provided with a CAN interface, which is a vehicle serial communication protocol interface.

7. The charging device of a mine-duty heavy truck motive battery as claimed in claim 6, characterized by The mine heavy truck power battery is connected with the vehicle serial communication protocol interface through the VCU during charging.

8. The charging device of a power battery of a mine heavy truck according to claim 7, characterized in that, The on-board battery cluster and the DCDC are connected with the VCU through a CAN bus.

9. The charging device of a power battery of a mine heavy truck according to claim 1, characterized in that, A circuit breaker is further arranged between the on-board battery cluster and the DCDC.

10. The charging device of a power battery of a mine heavy truck according to claim 1, characterized in that, The mine heavy truck power battery comprises at least two branch circuits with battery clusters in series, and the battery clusters are arranged at the ends of the branch circuits, and a single-cluster fuse is arranged on each branch circuit.

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