Parallel hybrid power chassis high-voltage power distribution system

Abstract

A parallel hybrid power chassis high-voltage power distribution system, comprising a box body (1), and a first quick charge interface (2), a second quick charge interface (3), first MCU interfaces (4), second MCU interfaces (5), first bodywork interfaces (6), second bodywork interfaces (7), and a water cooling interface (8) that are arranged on the surface of the box body (1). The interior of the box body (1) is configured as an upper layer and a lower layer, a high-voltage power distribution assembly is installed on the upper layer, and a high-voltage detection module and two sets of DC-DC modules are installed on the lower layer. The parallel hybrid power chassis high-voltage power distribution system of the present application adopts a dual-circuit powertrain capable of achieving grid-connected power supply, enhancing vehicle stability under complex working conditions.

Description

A parallel hybrid chassis high-voltage power distribution system Technical Field

[0001] The present application relates to the field of new energy vehicles, and more specifically, to a parallel hybrid chassis high-voltage power distribution system. Background Art

[0002] As the country's requirements for energy conservation and environmental protection become increasingly higher, the development of new energy is the main trend in the current development of the automotive industry. Hybrid power takes into account the long cruising range of traditional fuel vehicles and the low energy consumption and low emissions of pure electric vehicles. In 2022, hybrid power will account for 26% of new energy vehicle sales.

[0003] Current hybrid vehicle research and sales are primarily focused on the passenger car sector. Typically, a single-circuit powertrain is used to power electric vehicles. Under complex operating conditions, a failure in this circuit can lead to power outages and poor vehicle stability. However, the high-voltage power distribution system in this specialized hybrid vehicle chassis integrates a fuel engine and two electric powertrains. The high-voltage distribution system, based on vehicle instructions, handles busbar connection, grid connection, and load switching. One powertrain serves as a backup and power compensation system, enhancing vehicle stability in complex operating conditions.

[0004] Summary of the Invention

[0005] The purpose of the embodiments of the present application is to provide a parallel hybrid chassis high-voltage power distribution system, which can solve the technical problem of poor power supply stability of a single-circuit powertrain.

[0006] The embodiment of the present application provides a parallel hybrid chassis high-voltage power distribution system, including a box body, a first fast charging interface, a second fast charging interface, a first MCU interface, a second MCU interface, a first top-mounted interface, a second top-mounted interface, and a water-cooling interface provided on the surface of the box body. The interior of the box body is arranged into two layers, an upper and a lower layer. The upper layer of the box body is installed with a high-voltage power distribution component, and the high-voltage power distribution component includes a first fast charging circuit, a second fast charging circuit, a first controller circuit, a second controller circuit, a first top-mounted circuit, a second top-mounted circuit, and a water-cooling control circuit. The lower layer of the box body is installed with a high-voltage detection module and two sets of DC-DC modules. The first battery interface is externally connected to a first lithium battery assembly, and the second battery interfaces are externally connected to a second lithium battery assembly. The input end of the first fast charging circuit and the input end of the second fast charging circuit are respectively connected to the fast charging output interface. The first fast The output end of the charging circuit is electrically connected to the first lithium battery assembly and the second lithium battery assembly respectively, and the output end of the second fast charging circuit is electrically connected to the first lithium battery assembly and the second lithium battery assembly respectively. One end of the first controller circuit, one end of the second controller circuit, one end of the first upper circuit, one end of the second upper circuit, and one end of the water cooling control circuit are all electrically connected to the first lithium battery assembly and the second lithium battery assembly. The other end of the first controller circuit is electrically connected to the first MCU interface, the other end of the second control circuit is electrically connected to the second MCU interface, the other end of the first upper circuit is electrically connected to the first upper interface, the other end of the second upper circuit is electrically connected to the second upper interface, and the other end of the water cooling control circuit is electrically connected to the water cooling interface.

[0007] Preferably, a high-voltage detection module is also integrated inside the box body, and the high-voltage detection module is electrically connected to the first fast charging circuit, the second fast charging circuit, the first controller circuit, and the second controller circuit respectively.

[0008] Preferably, the first fast charging circuit includes a first DC-DC module, a fuse FU4, a fuse FU5, and a relay KM1; the second fast charging circuit includes a second DC-DC module, a fuse FU15, a fuse FU14, and a relay KM11; the input end of the first DC-DC module is connected to the first fast charging interface, the output end of the first DC-DC module is connected to the first lithium battery assembly through the fuse FU4, the input end of the relay KM1 is connected to the first fast charging interface, the output end of the relay KM1 is connected to the first lithium battery assembly through the fuse FU5, the output end of the second DC-DC module is connected to the second lithium battery assembly through the fuse FU15, the input end of the relay KM11 is connected to the second fast charging interface, and the output end of the relay KM11 is connected to the second lithium battery assembly through the fuse FU14.

[0009] Preferably, the first controller circuit includes a relay KM3, a relay KM4, a fuse FU6, and a resistor R1; the negative terminal of the first MCU interface is directly connected to the first lithium battery assembly, the positive terminal of the first MCU interface is connected to one end of the relay KM3, the other end of the relay KM3 is connected to one end of the fuse FU6, one end of the relay KM4 is connected to one end of the resistor R1, the other end of the resistor R1 is connected to one end of the relay KM3, the other end of the fuse FU6 and the other end of the relay KM4 are connected to the first lithium battery assembly; The second controller circuit includes relay KM9, relay KM10, fuse FU13, and resistor R2. The negative terminal of the second MCU interface is directly connected to the second lithium battery assembly, the positive terminal of the second MCU interface is connected to one end of the relay KM9, the other end of the relay KM9 is connected to one end of the fuse FU13, one end of the relay KM10 is connected to one end of the resistor R2, the other end of the resistor R2 is connected to one end of the relay KM9, the other end of the fuse FU13 and the other end of the relay KM10 are connected to the second lithium battery assembly.

[0010] Preferably, the first upper loading circuit includes a relay KM5, a fuse FU7, and a fuse FU8, the negative terminal of the first upper loading interface is connected to the first lithium battery assembly, the positive terminal of the first upper loading interface is connected to one end of the relay KM5, and the other end of the relay KM5 is respectively connected to one end of the fuse FU7 and one end of the fuse FU8, and the other end of the fuse FU7 and the other end of the fuse FU8 are electrically connected to the first lithium battery assembly; the first upper loading circuit includes a relay KM8, a fuse FU11, and a fuse FU12, the negative terminal of the second upper loading interface is connected to the second lithium battery assembly, the positive terminal of the second upper loading interface is connected to one end of the relay KM8, and the other end of the relay KM8 is respectively connected to one end of the fuse FU11 and one end of the fuse FU12, and the other end of the fuse FU11 and the other end of the fuse FU12 are electrically connected to the second lithium battery assembly.

[0011] Preferably, the water cooling control circuit includes relay KM6, relay KM7, fuse FU9, and fuse FU10. One end of the relay KM6 and one end of the relay KM7 are both connected to the water cooling interface. The other end of the relay KM6 is electrically connected to the first lithium battery assembly and the second lithium battery assembly through the fuse FU9. The other end of the relay KM7 and the fuse FU10 are electrically connected to the first lithium battery assembly and the second lithium battery assembly.

[0012] Preferably, the water cooling interface is externally connected to a water cooling assembly, and the water cooling assembly includes a first water inlet, a second water inlet, a first water outlet, a second water outlet, a first cooling pipe, and a second cooling pipe. The first water inlet, the second water inlet, the first water outlet, and the second water outlet are all installed on the box body. The first water inlet, the first cooling pipe, and the first water outlet are sequentially connected, and the second water inlet, the second cooling pipe, and the second water outlet are sequentially connected. The first cooling pipe is coiled on the first lithium battery assembly, and the second cooling pipe is coiled on the second lithium battery assembly.

[0013] Preferably, the main circuit of the first lithium battery assembly includes a fuse FU1, and the main circuit of the second lithium battery assembly includes a fuse FU2.

[0014] Beneficial effects of the present invention:

[0015] The present invention provides a parallel hybrid chassis high-voltage power distribution system, comprising a box body, a first fast-charging interface, a second fast-charging interface, a first MCU interface, a second MCU interface, a first top-loading interface, a second top-loading interface, and a water-cooling interface, the interior of the box body is arranged into two layers, the upper layer of the box body is installed with a high-voltage power distribution component, the high-voltage power distribution component includes a first fast-charging circuit, a second fast-charging circuit, a first controller circuit, a second controller circuit, a first top-loading circuit, a second top-loading circuit, and a water-cooling control circuit, the lower layer of the box body is installed with a high-voltage detection module and two sets of DC-DC modules, the first battery interface is externally connected to a first lithium battery assembly, and the second battery interface is externally connected to a second lithium battery assembly, the input end of the first fast-charging circuit and the input end of the second fast-charging circuit are respectively connected to the fast-charging output interface, the output end of the first fast-charging circuit is respectively electrically connected to the first lithium battery assembly and the second lithium battery assembly, and the output end of the second fast-charging circuit is respectively electrically connected to the first The lithium battery assembly and the second lithium battery assembly are electrically connected, one end of the first controller loop, one end of the second controller loop, one end of the first upper mounting loop, one end of the second upper mounting loop, and one end of the water-cooling control loop are all electrically connected to the first lithium battery assembly and the second lithium battery assembly, the other end of the first controller loop is electrically connected to the first MCU interface, the other end of the second control loop is electrically connected to the second MCU interface, the other end of the first upper mounting loop is electrically connected to the first upper mounting interface, the other end of the second upper mounting loop is electrically connected to the second upper mounting interface, and the other end of the water-cooling control loop is electrically connected to the water-cooling interface. The high-voltage power distribution assembly of the present invention has two sets of power battery inputs connected in parallel externally. After being controlled by the high-voltage power distribution system, there are two sets of motor MCU outputs, two sets of upper mounting outputs and DC outputs. It can be externally connected to two sets of fast charging input systems. The high-voltage power distribution system completes bus connection, grid connection, load connection and disconnection and other functions according to the vehicle instructions. One of the powertrains serves as a backup and power compensation to improve the vehicle's stability in complex working conditions. The present invention uses a dual-circuit powertrain that can be connected to the grid for power supply, and the high-voltage power distribution system can directly connect to an external power supply to power the upper system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0017] FIG1 is a front view of the present invention;

[0018] FIG2 is a rear view of the present invention;

[0019] FIG3 is a schematic diagram of a circuit of the present invention.

[0020] The reference numerals are:

[0021] 1. Box body; 2. First fast charging interface; 3. Second fast charging interface; 4. First MCU interface; 5. Second MCU interface; 6. First top loading interface; 7. Second top loading interface; 8. Water cooling interface; 9. First water inlet; 10. Second water inlet; 11. First water outlet; 12. 9. Second water outlet. DETAILED DESCRIPTION

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.

[0024] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0025] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of this application is typically placed when in use. These terms are intended only to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0026] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0027] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0028] As shown in Figures 1-3, a parallel hybrid chassis high-voltage power distribution system includes a box body 1, a first fast charging interface 2, a second fast charging interface 3, a first MCU interface 4, a second MCU interface 5, a first upper mounting interface 6, a second upper mounting interface 7, and a water cooling interface 8 provided on the surface of the box body 1. The interior of the box body 1 is arranged into two layers, the upper layer of the box body is installed with a high-voltage power distribution component, and the high-voltage power distribution component includes a first fast charging circuit, a second fast charging circuit, a first controller circuit, a second controller circuit, a first upper mounting circuit, a second upper mounting circuit, and a water cooling control circuit. The lower layer of the box body is installed with a high-voltage detection module and two sets of DC-DC modules. The first battery interface is externally connected to a first lithium battery assembly, and the second battery interface is externally connected to a second lithium battery assembly. The input end of the first fast charging circuit and the input end of the second fast charging circuit are respectively connected to the fast charging output interface, and the output end of the first fast charging circuit is respectively electrically connected to the first lithium battery assembly and the second lithium battery assembly, and the output end of the second fast charging circuit is respectively connected to The first lithium battery assembly and the second lithium battery assembly are electrically connected, one end of the first controller loop, one end of the second controller loop, one end of the first upper mounting loop, one end of the second upper mounting loop, and one end of the water-cooling control loop are all electrically connected to the first lithium battery assembly and the second lithium battery assembly, the other end of the first controller loop is electrically connected to the first MCU interface 4, the other end of the second control loop is electrically connected to the second MCU interface 5, the other end of the first upper mounting loop is electrically connected to the first upper mounting interface 6, the other end of the second upper mounting loop is electrically connected to the second upper mounting interface 7, and the other end of the water-cooling control loop is electrically connected to the water-cooling interface 8. The high-voltage power distribution assembly of the present invention has two sets of power battery inputs connected in parallel externally. After being controlled by the high-voltage power distribution system, there are two sets of motor MCU outputs, two sets of upper mounting outputs and DC outputs. It can be externally connected to two sets of fast charging input systems. The high-voltage power distribution system completes bus connection, grid connection, load connection and disconnection and other functions according to the vehicle instructions. One of the powertrains serves as a backup and power compensation to improve the vehicle's stability in complex working conditions. The present invention uses a dual-circuit powertrain that can be connected to the grid for power supply, and the high-voltage power distribution system can directly connect to an external power supply to power the upper system.

[0029] In this embodiment, a high-voltage detection module is also integrated inside the box body 1. The high-voltage detection module is electrically connected to the first fast charging circuit, the second fast charging circuit, the first controller circuit, and the second controller circuit respectively. The high-voltage detection module can detect the on-off status of each branch relay and the insulation status of each load branch, and report them to the BMS. At the same time, it can also detect the temperature status of the first lithium battery assembly, the second lithium battery assembly and the DCDC module.

[0030] In this embodiment, the first fast charging circuit includes a first DC-DC module, a fuse FU4, a fuse FU5, and a relay KM1; the second fast charging circuit includes a second DC-DC module, a fuse FU15, a fuse FU14, and a relay KM11; the input end of the first DC-DC module is connected to the first fast charging interface 2; the output end of the first DC-DC module is connected to the first lithium battery assembly through the fuse FU4; the input end of the relay KM1 is connected to the first fast charging interface 2; the output end of the relay KM1 is connected to the first lithium battery assembly through the fuse FU5; the output end of the second DC-DC module is connected to the second lithium battery assembly through the fuse FU15; the input end of the relay KM11 is connected to the second fast charging interface 3; and the output end of the relay KM11 is connected to the second lithium battery assembly through the fuse FU14.

[0031] In this embodiment, the first controller circuit includes a relay KM3, a relay KM4, a fuse FU6, and a resistor R1. The negative terminal of the first MCU interface 4 is directly connected to the first lithium battery assembly, the positive terminal of the first MCU interface 4 is connected to one end of the relay KM3, the other end of the relay KM3 is connected to one end of the fuse FU6, one end of the relay KM4 is connected to one end of the resistor R1, the other end of the resistor R1 is connected to one end of the relay KM3, and the other end of the fuse FU6 and the other end of the relay KM4 are connected to the first lithium battery assembly; The second controller circuit includes relay KM9, relay KM10, fuse FU13, and resistor R2. The negative terminal of the second MCU interface 5 is directly connected to the second lithium battery assembly, the positive terminal of the second MCU interface 5 is connected to one end of the relay KM9, the other end of the relay KM9 is connected to one end of the fuse FU13, one end of the relay KM10 is connected to one end of the resistor R2, the other end of the resistor R2 is connected to one end of the relay KM9, the other end of the fuse FU13 and the other end of the relay KM10 are connected to the second lithium battery assembly.

[0032] In this embodiment, the first upper loading circuit includes a relay KM5, a fuse FU7, and a fuse FU8. The negative terminal of the first upper loading interface 6 is connected to the first lithium battery assembly, and the positive terminal of the first upper loading interface 6 is connected to one end of the relay KM5. The other end of the relay KM5 is respectively connected to one end of the fuse FU7 and one end of the fuse FU8. The other end of the fuse FU7 and the other end of the fuse FU8 are electrically connected to the first lithium battery assembly; the first upper loading circuit includes a relay KM8, a fuse FU11, and a fuse FU12. The negative terminal of the second upper loading interface 7 is connected to the second lithium battery assembly, and the positive terminal of the second upper loading interface 7 is connected to one end of the relay KM8. The other end of the relay KM8 is respectively connected to one end of the fuse FU11 and one end of the fuse FU12. The other end of the fuse FU11 and the other end of the fuse FU12 are electrically connected to the second lithium battery assembly.

[0033] In this embodiment, the water cooling control circuit includes relay KM6, relay KM7, fuse FU9, and fuse FU10. One end of the relay KM6 and one end of the relay KM7 are both connected to the water cooling interface 8. The other end of the relay KM6 is electrically connected to the first lithium battery assembly and the second lithium battery assembly through the fuse FU9. The other end of the relay KM7 and the fuse FU10 are electrically connected to the first lithium battery assembly and the second lithium battery assembly.

[0034] In this embodiment, the water cooling interface 8 is externally connected to a water cooling component, and the water cooling component includes a first water inlet, a second water inlet, a first water outlet, a second water outlet, a first cooling pipe, and a second cooling pipe. The first water inlet, the second water inlet, the first water outlet, and the second water outlet are all installed on the box body 1. The first water inlet, the first cooling pipe, and the first water outlet are sequentially connected, and the second water inlet, the second cooling pipe, and the second water outlet are sequentially connected. The first cooling pipe is coiled on the first lithium battery assembly, and the second cooling pipe is coiled on the second lithium battery assembly.

[0035] The main circuit of the first lithium battery assembly includes fuse FU1, and the main circuit of the second lithium battery assembly includes fuse FU2. Fuse FU7, fuse FU8, fuse FU11, and fuse FU12 are intelligent fuses that can set current thresholds. When the current is overloaded, they actively cut off the main circuit to ensure the safety of the entire vehicle system. In pure electric (EV) mode and hybrid power (HYD) mode, the battery pack connection, dual-branch system independent or grid-connected connection, load connection and disconnection and other functions are completed according to the vehicle's instructions. In parking power generation (GEN) mode, the battery pack connection, grid connection and upper-mounted connection and disconnection and other functions are completed according to the vehicle's instructions, realizing the upper-mounted power supply branch selection function, and can feedback the upper-mounted current to the vehicle controller in real time; the lower layer of the box body 1 has a high-voltage detection module, two sets of DCDC modules, and a water cooling component. The high-voltage detection module has a self-test function, performs insulation testing on the high-voltage distribution box, attached battery pack, and load according to the vehicle's instruction requirements, and reports the insulation test values. The high-voltage detection module has an insulation detection branch inspection function, receives instructions from the vehicle controller to complete the insulation test function of each load branch. The high-voltage detection module has insulation detection functions when the subnet is powered independently and when it is connected to the grid, and reports the insulation test values. The high-voltage detection module can realize temperature control of the battery pack and high-voltage distribution box, ensuring the safety of the circuit and components when the high-voltage branch of the water-cooled unit is switched.

[0036] The control process of this system is:

[0037] When the vehicle starts, it receives the vehicle controller power-on status (ACC (low voltage), ON (high voltage), START (start)), vehicle operation mode (HYD (hybrid), EV (pure electric), GEM (generative parking), MD (pure mechanical)) and gear position information (D / N / R). It sends the main positive and negative contactor closing instructions to the battery pack BMS to realize the power battery pack online control;

[0038] Specific power-on process:

[0039] After the vehicle is powered on, the battery management system BMS is awakened;

[0040] The battery management system BMS performs self-test status. This high-voltage power distribution system has a built-in high-voltage safety detection module to detect the status of relay KM3, relay KM10, relay KM4, relay KM9, relay KM2, relay KM11, relay KM5, relay KM8, relay KM6, and relay KM7 in Figure 1, and report it to the battery management system BMS. If there is no fault, the battery management system BMS will feedback Ready to the vehicle controller VCU.

[0041] After passing the test, the vehicle controller VCU sends a high-voltage power-on command to close relays KM4 and KM9. After the pre-charging is completed, relays KM3 and KM10 are closed. After a delay of 100ms, relays KM4 and KM9 are disconnected.

[0042] High voltage power-up is completed.

[0043] When the vehicle is charging, it receives the gear position, speed, and power-on status of the vehicle controller, receives the charging request instruction of the battery pack BMS, and comprehensively determines whether to attract the charging contactor to complete the charging control;

[0044] When the load is powered, it receives vehicle status information, closes the contactors on each load output line, and completes load power distribution control;

[0045] In GEN (parking power generation) mode, after receiving the power-on state ON (high voltage) gear signal, the grid contactor is closed according to the control strategy. In HYD (hybrid) and EV (pure electric) modes, the grid contactor is disconnected.

[0046] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A parallel hybrid chassis high-voltage power distribution system, characterized in that: It includes a box body, a first fast charging interface, a second fast charging interface, a first MCU interface, a second MCU interface, a first upper loading interface, a second upper loading interface, and a water cooling interface provided on the surface of the box body. The interior of the box body is divided into upper and lower layers. A high-voltage power distribution component is installed in the upper layer of the box body. The high-voltage power distribution component includes a first fast charging circuit, a second fast charging circuit, a first controller circuit, a second controller circuit, a first upper loading circuit, a second upper loading circuit, and a water cooling control circuit. A high-voltage detection module and two sets of DC-DC modules are installed in the lower layer of the box body. The first battery interface is externally connected to a first lithium battery assembly, and the second battery interface is externally connected to a second lithium battery assembly. The input ends of the first fast charging circuit and the second fast charging circuit are respectively connected to the fast charging output interface. The output end of the first fast charging circuit is electrically connected to the first lithium battery assembly and the second lithium battery assembly respectively. The output end of the second fast charging circuit is electrically connected to the first lithium battery assembly and the second lithium battery assembly respectively. One end of the first controller circuit, one end of the second controller circuit, one end of the first upper loading circuit, one end of the second upper loading circuit, and one end of the water cooling control circuit are all electrically connected to the first lithium battery assembly and the second lithium battery assembly. The other end of the first controller circuit is electrically connected to the first MCU interface. The other end of the second control circuit is electrically connected to the second MCU interface. The other end of the first upper loading circuit is electrically connected to the first upper loading interface. The other end of the second upper loading circuit is electrically connected to the second upper loading interface. The other end of the water cooling control circuit is electrically connected to the water cooling interface.

2. The parallel hybrid chassis high-voltage power distribution system according to claim 1, wherein: A high-voltage detection module is also integrated inside the box body. The high-voltage detection module is respectively electrically connected to the first fast charging circuit, the second fast charging circuit, the first controller circuit, and the second controller circuit.

3. A parallel hybrid chassis high-voltage power distribution system according to claim 1, characterized in that: The first fast charging circuit includes a first DC-DC module, fuse FU4, fuse FU5, and relay KM1. The second fast charging circuit includes a second DC-DC module, fuse FU15, fuse FU14, and relay KM11. The input end of the first DC-DC module is connected to the first fast charging interface. The output end of the first DC-DC module is connected to the first lithium battery assembly through fuse FU4. The input end of relay KM1 is connected to the first fast charging interface. The output end of relay KM1 is connected to the first lithium battery assembly through fuse FU5. The output end of the second DC-DC module is connected to the second lithium battery assembly through fuse FU15. The input end of relay KM11 is connected to the second fast charging interface. The output end of relay KM11 is connected to the second lithium battery assembly through fuse FU14.

4. A parallel hybrid chassis high-voltage power distribution system according to claim 1, characterized in that: The first controller loop includes relay KM3, relay KM4, fuse FU6, and resistor R1. The negative terminal of the first MCU interface is directly connected to the first lithium battery assembly. The positive terminal of the first MCU interface is connected to one end of relay KM3. The other end of relay KM3 is connected to one end of fuse FU6. One end of relay KM4 is connected to one end of resistor R1. The other end of resistor R1 is connected to one end of relay KM3. The other end of fuse FU6 and the other end of relay KM4 are connected to the first lithium battery assembly. The second controller loop includes relay KM9, relay KM10, fuse FU13, and resistor R2. The negative terminal of the second MCU interface is directly connected to the second lithium battery assembly. The positive terminal of the second MCU interface is connected to one end of relay KM9. The other end of relay KM9 is connected to one end of fuse FU13. One end of relay KM10 is connected to one end of resistor R2. The other end of resistor R2 is connected to one end of relay KM9. The other end of fuse FU13 and the other end of relay KM10 are connected to the second lithium battery assembly.

5. A parallel hybrid chassis high-voltage power distribution system according to claim 1, characterized in that: The first upper mounting loop includes relay KM5, fuse FU7, and fuse FU8. The negative terminal of the first upper mounting interface is connected to the first lithium battery assembly. The positive terminal of the first upper mounting interface is connected to one end of relay KM5. The other end of relay KM5 is respectively connected to one end of fuse FU7 and one end of fuse FU8. The other end of fuse FU7 and the other end of fuse FU8 are electrically connected to the first lithium battery assembly. The first upper mounting loop includes relay KM8, fuse FU11, and fuse FU12. The negative terminal of the second upper mounting interface is connected to the second lithium battery assembly. The positive terminal of the second upper mounting interface is connected to one end of relay KM8. The other end of relay KM8 is respectively connected to one end of fuse FU11 and one end of fuse FU12. The other end of fuse FU11 and the other end of fuse FU12 are electrically connected to the second lithium battery assembly.

6. A parallel hybrid chassis high-voltage power distribution system according to claim 1, characterized in that: The water cooling control loop includes relay KM6, relay KM7, fuse FU9, and fuse FU10. One end of relay KM6 and one end of relay KM7 are both connected to the water cooling interface. The other end of relay KM6 is electrically connected to the first lithium battery assembly and the second lithium battery assembly through fuse FU9. The other end of relay KM7 is electrically connected to the first lithium battery assembly and the second lithium battery assembly through fuse FU10.

7. A parallel hybrid chassis high-voltage power distribution system according to claim 6, characterized in that: The water-cooling interface is externally connected to a water-cooling component, and the water-cooling component includes a first water inlet, a second water inlet, a first water outlet, a second water outlet, a first cooling pipe, and a second cooling pipe. The first water inlet, the second water inlet, the first water outlet, and the second water outlet are all installed on the box body. The first water inlet, the first cooling pipe, and the first water outlet are sequentially penetrated. The second water inlet, the second cooling pipe, and the second water outlet are sequentially penetrated. The first cooling pipe is coiled around the first lithium battery assembly, and the second cooling pipe is coiled around the second lithium battery assembly.

8. The parallel hybrid chassis high-voltage power distribution system according to claim 1, wherein: The main circuit of the first lithium battery assembly includes a fuse FU1, and the main circuit of the second lithium battery assembly includes a fuse FU2.

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