High-voltage framework suitable for pure electric wide-body vehicle

Abstract

The utility model provides a high-voltage framework suitable for a pure electric wide-body vehicle. A charging gun, a power battery and a battery water cooling unit are electrically connected with a battery BDU respectively; the battery BDU is electrically connected with the controller assembly; the controller assembly is electrically connected with the brake air pump motor, the steering oil pump motor, the storage battery, the lifting oil pump motor, the electric air conditioner, the electric heating PTC and the motor set. The motor set comprises a first motor, a second motor, a third motor and a fourth motor which are in power connection with the reduction gearbox. The utility model provides a high-voltage framework suitable for a pure electric wide-body vehicle. The high-voltage framework can meet the requirements of electric appliances required by the pure electric wide-body vehicle and enables the electric appliances to be controlled conveniently. The four driving motors in the power system are directly connected with the transmission shaft through the reduction gearbox, the problems of pause, power interruption and the like during gear shifting of the vehicle can be solved through torque and rotating speed adjustment of the four driving motors, the problem that the wide-body vehicle loses power during gear shifting on a ramp is avoided, and the safety of the vehicle is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a high -pressure framework suitable for pure electric wide -body car belongs to electric wide -body car technical field. BACKGROUND

[0002] Wide -body car is a non -highway cargo vehicle for mine working condition, is a self -discharging truck. Due to the requirement of the state for the high -quality development of mine, green mine becomes the trend of development, and the demand of new energy mine wide -body car in the market is also higher and higher.

[0003] Many high -pressure components need to be carried on pure electric wide -body car, including power battery, energy distribution unit, drive motor, lifting motor, steering oil pump motor, brake air pump motor, DC / DC, electric air conditioner, electric heating PTC etc., and the safety of the high -pressure system formed by the components, the operability of the whole vehicle and the life of the high -pressure components are closely related to the high -pressure framework of the whole vehicle.

[0004] At the same time, due to the harsh working condition of wide -body car, it needs long -term heavy -duty uphill or heavy -duty downhill operation. This has a greater test on the power system of wide -body car.

[0005] The existing Chinese public patent CN110303905B discloses a high -pressure topology structure including power battery system, power motor system, oil pump and air pump system, DC / DC system, air conditioning system, charging system and whole vehicle control device, connects each system through high -pressure wire harness and high -pressure distribution device, realizes the energy distribution and control of high -pressure system;But it does not design high -pressure system for the actual working condition of wide -body car, and can not meet the use requirement of wide -body car.

[0006] CN114643867B proposes a high -pressure topology of new energy bus, improves the generalization of high -pressure system of new energy bus, but it does not consider the actual working condition of wide -body car.

[0007] And CN214396436U designs a high -pressure topology structure including power battery system, first high -pressure distribution device, power motor system, PTC system, water pump system, air compressor system, air compressor DC / DC converter system, fuel cell DC / DC converter system, second high -pressure distribution device and whole vehicle control device, realizes the safe and reliable power on and off and energy distribution of whole vehicle through the coordinated work of these systems, improves the safety and reliability of whole vehicle, but it is only suitable for vehicles carrying fuel cell.

[0008] There is also CN211641858U which designs a pure electric truck high voltage topology, including a pantograph, a bidirectional DC / DC module, an energy storage device, an auxiliary electric appliance and a motor controller, through parallel connection, reduces the risk of equipment overvoltage damage, improves the system stability, but it is only suitable for double source trackless pure electric truck, and is not suitable for mine body truck. SUMMARY

[0009] The utility model provides a kind of high voltage architecture suitable for pure electric wide-body car, specific high voltage architecture design is made to pure electric wide-body car, and the power system structure including four motors and reduction gearbox etc.

[0010] Technical scheme: a kind of high voltage architecture suitable for pure electric wide-body car, including charging gun, power battery, battery water cooling unit, battery BDU, controller assembly, brake air pump motor, steering oil pump motor, battery, lifting oil pump motor, electric air conditioner, electric heating PTC, motor group and reduction gearbox;

[0011] The charging gun, power battery and battery water cooling unit are electrically connected with the battery BDU respectively;

[0012] The battery BDU is electrically connected with the controller assembly;

[0013] The controller assembly is respectively electrically connected with brake air pump motor, steering oil pump motor, battery, lifting oil pump motor, electric air conditioner, electric heating PTC and motor group;

[0014] The motor group includes first motor, second motor, third motor and fourth motor, and the first motor, second motor, third motor and fourth motor are all power-connected with the reduction gearbox.

[0015] The utility model provides a kind of high voltage architecture suitable for pure electric wide-body car, can satisfy the demand of pure electric wide-body car required electric appliance and make it convenient control. Four drive motors in power system are directly connected with transmission shaft through reduction gearbox, and through the torque and rotational speed adjustment of four drive motors, the problems such as jerk and power interruption when vehicle shifts gears can be solved, the problem that wide-body car loses power when shifting gears on slope is avoided, and the safety of vehicle is improved.

[0016] The controller assembly includes main multi-in-one controller and auxiliary multi-in-one controller;

[0017] The main multi-in-one controller is respectively electrically connected with brake air pump motor, steering oil pump motor, battery, lifting oil pump motor, electric air conditioner, electric heating PTC, first motor and second motor;

[0018] The auxiliary multi-in-one controller is electrically connected with the third motor and the fourth motor respectively.

[0019] In order to avoid the difficulty in application caused by the power and interface limitations of a single controller, the controller assembly is provided as two separate controllers, the power and interface are adapted to the corresponding electrical equipment, the production cost is reduced, and the stability of the whole machine high-voltage system is improved.

[0020] The charging gun includes a first charging gun and a second charging gun, and the first charging gun and the second charging gun are connected to an external power grid to charge the power battery through a battery BDU.

[0021] By providing two charging guns, a single or multiple charging guns can be selectively used for charging according to the current vehicle demand, and charging can still be performed when any one of the charging guns has a problem, thereby ensuring normal use of the vehicle.

[0022] The battery BDU includes a first charging positive relay, a first charging negative relay, a second charging positive relay, a second charging negative relay, a main positive relay, a main positive pre-charging relay, a main positive pre-charging resistor, and a main negative relay.

[0023] The first charging positive relay and the first charging negative relay are located on a high-voltage loop of the first charging gun and are used to control the charging function of the first charging gun, the second charging positive relay and the second charging negative relay are located on a high-voltage loop of the second charging gun and are used to control the charging function of the second charging gun.

[0024] The main positive relay and the main negative relay are located on a main loop of the whole vehicle high-voltage system and are total switches for all electrical equipment of the vehicle; the main positive pre-charging relay and the main positive pre-charging resistor are connected in series, and the series circuit composed of the main positive pre-charging relay and the main positive pre-charging resistor is connected in parallel with the main positive relay.

[0025] Under the condition of meeting the high-voltage power-on, through the control program setting, the main negative relay will be closed before the main positive relay to protect the circuit safety, the main positive pre-charging relay will be closed before the main positive relay, and after the voltage difference at both ends of the main positive relay is less than 5V, the main positive pre-charging relay is disconnected, the main positive relay is closed, the main loop is powered on, and the main positive pre-charging resistor limits the current size during pre-charging to prevent current impact caused by excessive voltage difference in the early stage of pre-charging.

[0026] The main multi-in-one controller includes an auxiliary drive relay, an auxiliary drive pre-charging relay, an auxiliary drive pre-charging resistor, a lifting relay, a lifting pre-charging relay, a lifting pre-charging resistor, a PTC relay, a first main drive relay, a first main drive pre-charging relay, a first main drive pre-charging resistor, and a first main drive pre-charging capacitor.

[0027] The auxiliary drive relay, the auxiliary drive pre-charging relay and the auxiliary drive pre-charging resistor are located on the auxiliary drive sub-circuit, the auxiliary drive pre-charging relay and the auxiliary drive pre-charging resistor are connected in series, and the series circuit composed of the auxiliary drive pre-charging relay and the auxiliary drive pre-charging resistor is connected in parallel with the auxiliary drive relay, for controlling the power distribution of the brake air pump motor, the steering oil pump motor and the storage battery;

[0028] The lifting relay, the lifting pre-charging relay and the lifting pre-charging resistor are located on the sub-circuit of the lifting oil pump motor and the electric air conditioner, the lifting pre-charging relay and the lifting pre-charging resistor are connected in series, and the series circuit composed of the lifting pre-charging relay and the lifting pre-charging resistor is connected in parallel with the lifting relay, for controlling the power distribution of the lifting oil pump motor and the electric air conditioner;

[0029] The PTC relay is located on the sub-circuit of the electric heating PTC, for controlling the power distribution of the electric heating PTC;

[0030] The first main drive relay, the first main drive pre-charging relay, the first main drive pre-charging resistor and the first main drive pre-charging capacitor are located on the sub-circuit of the first motor and the second motor, the first main drive pre-charging relay and the first main drive pre-charging resistor are connected in series, and the series circuit composed of the first main drive pre-charging relay and the first main drive pre-charging resistor is connected in parallel with the first main drive relay, and the first main pre-charging capacitor is connected in parallel between the positive circuit and the negative circuit where the first main drive relay is located;

[0031] DC / AC converters are arranged on the sub-circuit where the brake air pump motor, the steering oil pump motor, the lifting oil pump motor, the first motor and the second motor are located; and a DC / DC converter is arranged on the sub-circuit where the storage battery is located.

[0032] Each pre-charging relay and pre-charging resistor in the main multi-in-one controller is connected before the main circuit relay is connected, so as to protect the circuit from damage caused by current impact on the electrical appliances; each DC / DC converter is used to convert high-voltage current into low-voltage current, so as to adapt to the normal work of the electrical appliances, and the DC / AC converter is used to convert direct current into alternating current for normal use of the electrical appliances; and each converter reports the state in real time during the working process, so as to facilitate the operator to understand the current vehicle state.

[0033] The auxiliary multi-in-one controller comprises a second main drive relay, a second main drive pre-charging relay, a second main drive pre-charging resistor and a second main drive pre-charging capacitor;

[0034] The second main drive relay, the second main drive pre-charging relay, the second main drive pre-charging resistor and the second main drive pre-charging capacitor are located on the sub-circuit of the third motor and the fourth motor, the second main drive pre-charging relay and the second main drive pre-charging resistor are connected in series, and the series circuit composed of the second main drive pre-charging relay and the second main drive pre-charging resistor is connected in parallel with the second main drive relay, and the second main drive pre-charging capacitor is connected in parallel between the positive circuit and the negative circuit where the second main drive relay is located.

[0035] The third motor and the fourth motor are provided with DC / AC converters on the sub-circuit.

[0036] The auxiliary multi-combined controller is mainly used for sharing the work load of the controller in the whole high-voltage system, and the control of the third motor and the fourth motor in the four motors is shared to the auxiliary multi-combined controller, so that the whole high-voltage system can be operated safely and healthily, the pre-charging relay and the pre-charging resistor have the same effect as those in the main multi-combined controller, and are used for safe operation of the protection circuit, limiting the current size during pre-charging, preventing current impact caused by too large voltage difference in the early stage of pre-charging, and the pre-charging capacitor is used for making the voltage at the rear end of the main drive relay rise smoothly during pre-charging, avoiding the influence of too large voltage instantaneous change on the circuit.

[0037] Beneficial effects: the utility model provides a kind of high pressure architecture suitable for pure electric wide-body car, can satisfy the demand of pure electric wide-body car needed electrical appliance and make it convenient control.Four drive motors in power system are directly connected with transmission shaft through reduction gearbox, through the torque and rotational speed regulation of four drive motors, the problems such as jerk and power interruption when vehicle shifts gear can be solved, the problem that wide-body car loses power when shifting gear on slope is avoided, and the safety of vehicle is improved. BRIEF DESCRIPTION OF DRAWINGS

[0038] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be simply introduced below, and obviously, the drawings in the following description are only the embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative labor.

[0039] Figure 1 It is the high-voltage system and electrical appliance connection framework schematic diagram of the utility model.

[0040] Figure 2 It is the high-voltage system circuit diagram of the utility model.

[0041] Figure 3 It is the high-voltage system circuit diagram of the utility model.

[0042] Figure 4 It is the high-voltage system circuit diagram of the utility model. DETAILED DESCRIPTION

[0043] With reference to the drawings and the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described, obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0044] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0045] In the present application, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature to the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature to the second feature include that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0046] As shown in Figure 1 A high-voltage architecture suitable for a pure electric wide-body vehicle, comprising a charging gun 1, a power battery 2, a battery water cooling unit 3, a battery BDU 4, a controller assembly 5, a brake air pump motor 6, a steering oil pump motor 7, a storage battery 8, a lifting oil pump motor 9, an electric air conditioner 10, an electric heating PTC 11, a motor set 12 and a reduction box 13.

[0047] The charging gun 1, the power battery 2 and the battery water cooling unit 3 are respectively electrically connected with the battery BDU 4;

[0048] The battery BDU 4 is electrically connected with the controller assembly 5;

[0049] The controller assembly 5 is respectively electrically connected with the brake air pump motor 6, the steering oil pump motor 7, the storage battery 8, the lifting oil pump motor 9, the electric air conditioner 10, the electric heating PTC 11 and the motor set 12;

[0050] The motor set 12 comprises a first motor 121, a second motor 122, a third motor 123 and a fourth motor 124, and the first motor 121, the second motor 122, the third motor 123 and the fourth motor 124 are all in power connection with the reduction gearbox 13.

[0051] The utility model provides a kind of high pressure architecture suitable for pure electric wide-body car, can satisfy the demand of pure electric wide-body car required electrical appliance and make it convenient control.Four drive motors in power system are directly connected with transmission shaft through reduction gearbox 13, through the torque and rotational speed adjustment of four drive motors, the problem such as power interruption when vehicle gear shifting can be solved, the problem that wide-body car loses power when shifting on ramp is avoided, and the safety of vehicle is improved.

[0052] The controller assembly 5 comprises a main all-in-one controller 51 and an auxiliary all-in-one controller 52.

[0053] The main all-in-one controller 51 is electrically connected with the brake air pump motor 6, the steering oil pump motor 7, the storage battery 8, the lifting oil pump motor 9, the electric air conditioner 10, the electric heating PTC 11, the first motor 121 and the second motor 122 respectively.

[0054] The auxiliary all-in-one controller 52 is electrically connected with the third motor 123 and the fourth motor 124 respectively.

[0055] In order to avoid the difficulty in application caused by the power and interface limitation of a single controller, the controller assembly 5 is provided as two separate controllers, to realize the adaptation of power and interface to corresponding electrical equipment, reduce production cost and improve the stability of the high-voltage system of the whole machine.

[0056] The charging gun 1 comprises a first charging gun 101 and a second charging gun 102, and the first charging gun 101 and the second charging gun 102 are connected to the external power grid to charge the power battery 2 through the battery BDU 4.

[0057] By providing two charging guns 1, a single or multiple charging guns 1 can be selectively used for charging according to the current vehicle demand, and charging can still be performed when any one of the charging guns 1 has a problem, to ensure that the vehicle can be normally used.

[0058] As shown in Figures 2 to 4 The battery BDU 4 comprises a first charging positive relay 41, a first charging negative relay 42, a second charging positive relay 43, a second charging negative relay 44, a main positive relay 45, a main positive pre-charging relay 46, a main positive pre-charging resistor 47 and a main negative relay 48.

[0059] The first charging positive relay 41 and the first charging negative relay 42 are located on the high-voltage loop of the first charging gun 101 and are used to control the charging function of the first charging gun 101; the second charging positive relay 43 and the second charging negative relay 44 are located on the high-voltage loop of the second charging gun 102 and are used to control the charging function of the second charging gun 102;

[0060] The main positive relay 45 and the main negative relay 48 are located on the main loop of the whole vehicle high-voltage system and are used as the total switch of all the electric appliances of the vehicle; the main positive pre-charging relay 46 and the main positive pre-charging resistor 47 are connected in series, and the series circuit composed of the main positive pre-charging relay 46 and the main positive pre-charging resistor 47 is connected in parallel with the main positive relay 45.

[0061] Under the condition of meeting the high-voltage power-on, the main negative relay 48 will be closed before the main positive relay 45 by the control program setting, so as to protect the circuit safety; the main positive pre-charging relay 46 will be closed before the main positive relay 45, and after the voltage difference at both ends of the main positive relay 45 is less than 5V, the main positive pre-charging relay 46 is disconnected, and the main positive relay 45 is closed, so as to realize the power-on of the main loop; the main positive pre-charging resistor 47 is used to limit the current size during pre-charging, so as to prevent the current impact caused by the too large voltage difference in the initial pre-charging period.

[0062] The main multi-in-one controller 51 comprises an auxiliary drive relay 511, an auxiliary drive pre-charging relay 512, an auxiliary drive pre-charging resistor 513, a lifting relay 514, a lifting pre-charging relay 515, a lifting pre-charging resistor 516, a PTC relay 517, a first main drive relay 518, a first main drive pre-charging relay 519, a first main drive pre-charging resistor 520, and a first main drive pre-charging capacitor 5201.

[0063] The auxiliary drive relay 511, the auxiliary drive pre-charging relay 512, and the auxiliary drive pre-charging resistor 513 are located on the auxiliary drive sub-loop; the auxiliary drive pre-charging relay 512 and the auxiliary drive pre-charging resistor 513 are connected in series, and the series circuit composed of the auxiliary drive pre-charging relay 512 and the auxiliary drive pre-charging resistor 513 is connected in parallel with the auxiliary drive relay 511, and are used to control the power distribution of the brake air pump motor 6, the steering oil pump motor 7, and the storage battery 8.

[0064] The lifting relay 514, the lifting pre-charging relay 515, and the lifting pre-charging resistor 516 are located on the sub-loop of the lifting oil pump motor 9 and the electric air conditioner 10; the lifting pre-charging relay 515 and the lifting pre-charging resistor 516 are connected in series, and the series circuit composed of the lifting pre-charging relay 515 and the lifting pre-charging resistor 516 is connected in parallel with the lifting relay 514, and are used to control the power distribution of the lifting oil pump motor 9 and the electric air conditioner 10.

[0065] The PTC relay 517 is located on the sub-loop of the electric heating PTC 11 and is used to control the power distribution of the electric heating PTC 11.

[0066] The first main drive relay 518, the first main drive pre-charging relay 519, the first main drive pre-charging resistor 520 and the first main drive pre-charging capacitor 5201 are located on the sub-circuit of the first motor 121 and the second motor 122, the first main drive pre-charging relay 519 and the first main drive pre-charging resistor 520 are connected in series, and the series circuit composed of the first main drive pre-charging relay 519 and the first main drive pre-charging resistor 520 is connected in parallel with the first main drive relay 518, and the first main pre-charging capacitor is connected in parallel between the positive circuit and the negative circuit where the first main drive relay 518 is located.

[0067] The sub-circuit where the brake air pump motor 6, the steering oil pump motor 7, the lifting oil pump motor 9, the first motor 121 and the second motor 122 are located is provided with a DC / AC converter; and the sub-circuit where the storage battery 8 is located is provided with a DC / DC converter.

[0068] Each pre-charging relay and pre-charging resistor in the main all-in-one controller 51 is connected before the main circuit relay is connected, so as to protect the circuit from current impact and damage to the electrical appliances; each DC / DC converter is used to convert high-voltage current into low-voltage current, so as to adapt to the normal work of the electrical appliances, and the DC / AC converter is used to convert direct current into alternating current for normal use of the electrical appliances; and each converter reports the state in real time during operation, so as to facilitate the operator to understand the current vehicle state.

[0069] The auxiliary all-in-one controller 52 includes a second main drive relay 521, a second main drive pre-charging relay 522, a second main drive pre-charging resistor 523 and a second main drive pre-charging capacitor 524.

[0070] The second main drive relay 521, the second main drive pre-charging relay 522, the second main drive pre-charging resistor 523 and the second main drive pre-charging capacitor 524 are located on the sub-circuit of the third motor 123 and the fourth motor 124, the second main drive pre-charging relay 522 and the second main drive pre-charging resistor 523 are connected in series, and the series circuit composed of the second main drive pre-charging relay 522 and the second main drive pre-charging resistor 523 is connected in parallel with the second main drive relay 521, and the second main drive pre-charging capacitor 524 is connected in parallel between the positive circuit and the negative circuit where the second main drive relay 521 is located.

[0071] The sub-circuit where the third motor 123 and the fourth motor 124 are located is provided with a DC / AC converter.

[0072] The auxiliary multi-combined controller 52 is mainly used for sharing the work load of the controller in the whole high-voltage system, and the control of the third and fourth motors 124 in the four motors is shared to the auxiliary multi-combined controller 52, so that the whole high-voltage system can be safely and healthily operated, and the pre-charging relay and the pre-charging resistor have the same effect as the main multi-combined controller 51, and are used for safe operation of the protection circuit, limiting the size of the current during pre-charging, preventing current impact caused by too large voltage difference in the initial pre-charging period, and the pre-charging capacitor is used for making the voltage at the rear end of the main drive relay rise smoothly during pre-charging, avoiding the influence of too large voltage instantaneous change on the circuit.

[0073] The various embodiments are described in the specification by way of progression, each building on the previous embodiment, but it is contemplated that each embodiment can provide a novel embodiment independently. For the embodiments disclosed, as well as embodiments not specifically described herein, each embodiment can be implemented in various ways, including implementation in hardware and / or in software including computer-readable instructions executed by one or more processors.

[0074] The above description of disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A high voltage architecture suitable for a pure electric wide-body vehicle, characterized in that: It includes a charging gun (1), a power battery (2), a battery water cooling unit (3), a battery BDU (4), a controller assembly (5), a brake air pump motor (6), a steering oil pump motor (7), a storage battery (8), a lifting oil pump motor (9), an electric air conditioner (10), an electric heating PTC (11), a motor set (12) and a reduction box (13); The charging gun (1), the power battery (2) and the battery water cooling unit (3) are respectively electrically connected with the battery BDU (4); The battery BDU (4) is electrically connected with the controller assembly (5); The controller assembly (5) is respectively electrically connected with the brake air pump motor (6), the steering oil pump motor (7), the storage battery (8), the lifting oil pump motor (9), the electric air conditioner (10), the electric heating PTC (11) and the motor set (12); The motor set (12) includes a first motor (121), a second motor (122), a third motor (123) and a fourth motor (124), and the first motor (121), the second motor (122), the third motor (123) and the fourth motor (124) are all power-connected with the reduction box (13).

2. The high voltage architecture suitable for a pure electric wide-body vehicle according to claim 1, characterized in that: The controller assembly (5) includes a main multi-in-one controller (51) and an auxiliary multi-in-one controller (52); The main multi-in-one controller (51) is respectively electrically connected with the brake air pump motor (6), the steering oil pump motor (7), the storage battery (8), the lifting oil pump motor (9), the electric air conditioner (10), the electric heating PTC (11), the first motor (121) and the second motor (122); The auxiliary multi-in-one controller (52) is respectively electrically connected with the third motor (123) and the fourth motor (124).

3. The high voltage architecture suitable for a pure electric wide-body vehicle according to claim 2, characterized in that: The charging gun (1) includes a first charging gun (101) and a second charging gun (102), and the first charging gun (101) and the second charging gun (102) are connected with an external power grid to charge the power battery (2) through the battery BDU (4).

4. The high voltage architecture suitable for a pure electric wide-body vehicle according to claim 3, characterized in that: The battery BDU (4) includes a first charging positive relay (41), a first charging negative relay (42), a second charging positive relay (43), a second charging negative relay (44), a main positive relay (45), a main positive pre-charging relay (46), a main positive pre-charging resistor (47) and a main negative relay (48); The first charging positive relay (41) and the first charging negative relay (42) are located on the high-voltage loop of the first charging gun (101) and are used for controlling the charging function of the first charging gun (101), the second charging positive relay (43) and the second charging negative relay (44) are located on the high-voltage loop of the second charging gun (102) and are used for controlling the charging function of the second charging gun (102); The main positive relay (45) and the main negative relay (48) are located on the main loop of the high-voltage system of the whole vehicle and are used as the main switch of all electric appliances of the vehicle; the main positive pre-charging relay (46) and the main positive pre-charging resistor (47) are connected in series, and the series circuit composed of the main positive pre-charging relay (46) and the main positive pre-charging resistor (47) is connected in parallel with the main positive relay (45).

5. The high voltage architecture suitable for pure electric wide-body vehicle of claim 2, wherein: The main all-in-one controller (51) comprises an auxiliary drive relay (511), an auxiliary drive pre-charging relay (512), an auxiliary drive pre-charging resistor (513), a lifting relay (514), a lifting pre-charging relay (515), a lifting pre-charging resistor (516), a PTC relay (517), a first main drive relay (518), a first main drive pre-charging relay (519), a first main drive pre-charging resistor (520) and a first main drive pre-charging capacitor (5201); The auxiliary drive relay (511), the auxiliary drive pre-charging relay (512) and the auxiliary drive pre-charging resistor (513) are located on the auxiliary drive sub-circuit, the auxiliary drive pre-charging relay (512) and the auxiliary drive pre-charging resistor (513) are connected in series, and the series circuit composed of the auxiliary drive pre-charging relay (512) and the auxiliary drive pre-charging resistor (513) is connected in parallel with the auxiliary drive relay (511), for controlling the power distribution of the brake air pump motor (6), the steering oil pump motor (7) and the storage battery (8); The lifting relay (514), the lifting pre-charging relay (515) and the lifting pre-charging resistor (516) are located on the sub-circuit of the lifting oil pump motor (9) and the electric air conditioner (10), the lifting pre-charging relay (515) and the lifting pre-charging resistor (516) are connected in series, and the series circuit composed of the lifting pre-charging relay (515) and the lifting pre-charging resistor (516) is connected in parallel with the lifting relay (514), for controlling the power distribution of the lifting oil pump motor (9) and the electric air conditioner (10); The PTC relay (517) is located on the sub-circuit of the electric heating PTC (11), for controlling the power distribution of the electric heating PTC (11); The first main drive relay (518), the first main drive pre-charging relay (519), the first main drive pre-charging resistor (520) and the first main drive pre-charging capacitor (5201) are located on the sub-circuit of the first motor (121) and the second motor (122), the first main drive pre-charging relay (519) and the first main drive pre-charging resistor (520) are connected in series, and the series circuit composed of the first main drive pre-charging relay (519) and the first main drive pre-charging resistor (520) is connected in parallel with the first main drive relay (518), and the first main pre-charging capacitor is connected in parallel between the positive circuit and the negative circuit where the first main drive relay (518) is located; DC / AC converters are arranged on the sub-circuits where the brake air pump motor (6), the steering oil pump motor (7), the lifting oil pump motor (9), the first motor (121) and the second motor (122) are located; and a DC / DC converter is arranged on the sub-circuit where the storage battery (8) is located.

6. The high voltage architecture suitable for pure electric wide-body vehicle of claim 2, wherein: The auxiliary all-in-one controller (52) comprises a second main drive relay (521), a second main drive pre-charging relay (522), a second main drive pre-charging resistor (523) and a second main drive pre-charging capacitor (524); The second main drive relay (521), the second main drive pre-charging relay (522), the second main drive pre-charging resistor (523) and the second main drive pre-charging capacitor (524) are located on the sub-circuit of the third motor (123) and the fourth motor (124), the second main drive pre-charging relay (522) and the second main drive pre-charging resistor (523) are connected in series, and the series circuit composed of the second main drive pre-charging relay (522) and the second main drive pre-charging resistor (523) is connected in parallel with the second main drive relay (521), and the second main drive pre-charging capacitor (524) is connected in parallel between the positive circuit and the negative circuit where the second main drive relay (521) is located. The sub-circuit where the third motor (123) and the fourth motor (124) are located is provided with a DC / AC converter.

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