CN219749563U - Double-branch PDU and heavy truck with same - Google Patents

Abstract

The utility model provides a double-branch PDU and a heavy truck with the same. The above-mentioned double-tributary PDU includes: the box body is provided with a containing cavity, the cavity wall of the containing cavity comprises a first side wall, a second side wall and a bottom wall, the first side wall and the second side wall are arranged at intervals along a first preset direction, and the first side wall and the second side wall are connected to the bottom wall; the plug-in component is connected with the first side wall and the second side wall respectively; the electrical system comprises an anode electrical module and a cathode electrical module, the anode electrical module and the cathode electrical module are all arranged on the bottom wall, both ends of the anode electrical module and both ends of the cathode electrical module are electrically connected with the plug-in assembly, and the cathode electrical module and the anode electrical module are arranged at intervals along a second preset direction; the second preset direction and the first preset direction are arranged in an angle. The double-branch PDU can improve the safety performance of the PDU when the battery pack is charged and discharged at high frequency.

Description

Double-branch PDU and heavy truck with same

Technical Field

The utility model relates to the technical field of new energy automobiles, in particular to a double-branch PDU and a heavy truck with the double-branch PDU.

Background

The electric power resource is used as an environment-friendly new energy, is widely applied to the field of automobiles, is used for turnover materials by using new energy automobiles represented by heavy truck automobiles, and has low use cost and simple maintenance compared with common fuel heavy truck automobiles, and is deeply favored by users. For heavy-duty cards, safety in charging and discharging battery packs in the power supply system of the heavy-duty card is particularly important. In general, a power supply system of a heavy truck generally has a plurality of battery packs, and in this case, the plurality of battery packs need to be connected to a heavy truck motor through a PDU (Power Distribution Unit), i.e., a power distribution unit). In the long-term use process of the battery pack of the electric heavy truck, the battery pack is inevitably subjected to high-frequency charging and discharging, the structure of the internal electric circuit is complex in the conventional PDU, and the problem of huge potential safety hazard exists in the high-frequency charging and discharging process of the battery pack.

Disclosure of Invention

Therefore, the present utility model aims to overcome the defects in the prior art, and provide a dual-branch PDU, which can improve the safety performance of the PDU during high-frequency charging and discharging of a battery pack.

The utility model also provides a heavy truck with the double-branch PDU.

The utility model provides the following technical scheme:

an embodiment of a dual-leg PDU according to the first aspect of the present utility model comprises: the box body is provided with a containing cavity, the cavity wall of the containing cavity comprises a first side wall, a second side wall and a bottom wall, the first side wall and the second side wall are arranged at intervals along a first preset direction, and the first side wall and the second side wall are connected to the bottom wall; the plug-in assembly is connected with the first side wall and the second side wall respectively; the electric system comprises an anode electric module and a cathode electric module, the anode electric module and the cathode electric module are all installed on the bottom wall, two ends of the anode electric module and two ends of the cathode electric module are electrically connected with the plug-in assembly, and the cathode electric module and the anode electric module are arranged at intervals along a second preset direction; the second preset direction and the first preset direction are arranged in an angle.

The double-branch PDU according to the embodiment of the utility model has at least the following beneficial effects:

in the double-branch PDU, the accommodating cavity is used for accommodating and placing the electrical system so as to play a role in protecting the electrical system; the plug-in component is arranged on the first side wall and the second side wall of the accommodating cavity, so that the plug-in component can be electrically connected with an electrical system in the accommodating cavity; the negative electrode electric module and the positive electrode electric module in the electric system are arranged at intervals along the second preset direction, so that the cross generated between the positive electrode circuit and the negative electrode circuit in the electric system can be reduced, the PDU with a simple internal electric circuit structure is provided, the electric system can be ensured to have a larger electric safety gap, and the safety performance of the PDU in high-frequency charging and discharging of a battery pack is improved.

According to the double-branch PDU of the embodiment of the utility model, the connector assembly comprises a heating connector, the heating connector is connected to the first side wall, and the positive electrode electric module and the negative electrode electric module are respectively arranged on two sides of the heating connector along the second preset direction.

According to the double-branch PDU of the embodiment of the utility model, the connector assembly further comprises an anode connector and a cathode connector, the anode connector and the cathode connector are connected to the second side wall, the anode connector and the cathode connector are respectively arranged on two sides of the heating connector along the second preset direction, one end of the anode electrical module is electrically connected with the anode connector, and one end of the cathode electrical module is electrically connected with the cathode connector.

According to the double-branch PDU of the embodiment of the utility model, the connector assembly further comprises a first cluster connector and a second cluster connector, the first cluster connector and the second cluster connector are connected to the first side wall, the first cluster connector and the second cluster connector are respectively arranged on two sides of the heating connector along the second preset direction, the other end of the positive electrode electric module is electrically connected with the first cluster connector, and the other end of the negative electrode electric module is electrically connected with the second cluster connector.

According to the double-branch PDU provided by the embodiment of the utility model, the positive electrode electric module comprises a first loop charging relay, a positive electrode relay and a positive electrode special-shaped copper bar assembly, wherein two ends of the first loop charging relay are respectively electrically connected with the positive electrode connector and the positive electrode relay through the positive electrode special-shaped copper bar assembly, and one end of the positive electrode relay, which is far away from the first loop charging relay, is electrically connected with the first cluster connector through the positive electrode special-shaped copper bar assembly.

According to the double-branch PDU provided by the embodiment of the utility model, the negative electrode electric module comprises a second loop charging relay, a negative electrode relay and a negative electrode special-shaped copper bar assembly, wherein two ends of the second loop charging relay are respectively electrically connected with the negative electrode connector and the negative electrode relay through the negative electrode special-shaped copper bar assembly, and one end of the negative electrode relay, which is far away from the second loop charging relay, is electrically connected with the second cluster connector through the negative electrode special-shaped copper bar assembly.

According to the double-branch PDU of the embodiment of the present utility model, the cavity wall of the accommodating cavity further includes a third side wall and a fourth side wall, the third side wall and the fourth side wall are disposed at intervals along the second preset direction, two ends of the third side wall are respectively in sealing connection with the first side wall and the second side wall, two ends of the fourth side wall are respectively in sealing connection with the first side wall and the second side wall, and the first side wall, the second side wall, the third side wall and the fourth side wall are respectively in sealing connection with the bottom wall.

According to the double-branch PDU provided by the embodiment of the utility model, the box body is bent into the first side wall, the second side wall, the third side wall and the fourth side wall through metal plates.

According to the double-branch PDU provided by the embodiment of the utility model, the box body further comprises a spring handle, and the spring handles are arranged on the third side wall and the fourth side wall;

wherein the spring handle is in a first position when the spring of the spring handle is in a non-deformed state and in a second position when the spring of the spring handle is in a compressed state.

The heavy truck according to the embodiment of the second aspect of the utility model comprises: the double tributary PDU as described above.

The heavy truck according to the embodiment of the utility model has at least the following beneficial effects:

in the heavy truck, the double-branch PDU can improve the safety performance of the PDU when the heavy truck battery Bao Gaopin is charged and discharged, so that the heavy truck has stronger safety when being charged and driven.

In order to make the above objects, features and advantages of the present utility model more comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic top view of a dual-leg PDU according to an embodiment of the present utility model;

FIG. 2 shows a schematic structural view of a case according to an embodiment of the present utility model;

fig. 3 shows a schematic structural diagram of an anode special-shaped copper bar assembly and a cathode special-shaped copper bar assembly according to an embodiment of the utility model;

fig. 4 shows a schematic structural view of a spring handle according to an embodiment of the present utility model.

Description of main reference numerals:

100-box body; 110-a receiving cavity; 111-a first sidewall; 112-a second sidewall; 113-a bottom wall; 114-a third sidewall; 115-fourth side wall; 120-spring handles; 121-a spring; 122-handle; 130-a third mounting hole; 140-blind nut posts;

200-a connector assembly; 210-heating the connector; 220-positive connector; 230-a negative electrode connector; 240-a first cluster connector; 250-second cluster connectors; 260-a water pump connector; 270-moisture sensitive connectors;

300-an electrical system; 310-positive electrode electrical module; 311-a first loop charging relay; 312-positive relay; 313-positive electrode special-shaped copper bar assembly; 3131—a first mounting hole; 314-pre-charge relay; 315-pre-charge resistance; 320-a negative electrical module; 321-a second loop charging relay; 322-negative relay; 323-negative electrode special-shaped copper bar assembly; 3231—a second mounting hole; 324-hall sensor; 330-a water pump relay; 340-heating the fuse; 350-battery cluster management unit.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used in the description of the templates herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 and 2, a dual-leg PDU according to an embodiment of the present utility model includes: the housing 100, the connector assembly 200, and the electrical system 300.

Specifically, the box 100 is provided with a containing cavity 110, the cavity wall of the containing cavity 110 includes a first side wall 111, a second side wall 112 and a bottom wall 113, the first side wall 111 and the second side wall 112 are arranged at intervals along a first preset direction, and the first side wall 111 and the second side wall 112 are connected to the bottom wall 113; the connector assembly 200 is connected to the first sidewall 111 and the second sidewall 112 respectively; the electrical system 300 includes an anode electrical module 310 and a cathode electrical module 320, the anode electrical module 310 and the cathode electrical module 320 are all mounted on the bottom wall 113, and two ends of the anode electrical module 310 and two ends of the cathode electrical module 320 are all electrically connected with the socket assembly 200, and the cathode electrical module 320 and the anode electrical module 310 are arranged at intervals along a second preset direction; the second preset direction and the first preset direction are arranged in an angle.

More specifically, in one embodiment, the first preset direction is the direction indicated by x as shown in fig. 1, and in other embodiments, the first preset direction may also be the opposite direction to the direction indicated by x as shown in fig. 1.

Likewise, in one embodiment, the second preset direction is the direction indicated by y as shown in fig. 1, and in other embodiments, the second preset direction may be the opposite direction to the direction indicated by y as shown in fig. 1.

In the above-mentioned dual-branch PDU, the accommodating cavity 110 is used for accommodating and placing the electrical system 300, so as to play a role in protecting the electrical system 300; the connector assembly 200 is mounted on the first side wall 111 and the second side wall 112 of the accommodating cavity 110, so that the connector assembly 200 can be electrically connected with the electrical system 300 in the accommodating cavity 110; the negative electrode electrical module 320 and the positive electrode electrical module 310 in the electrical system 300 are arranged at intervals along the second preset direction, so that the intersections generated between the positive electrode circuit and the negative electrode circuit in the electrical system 300 can be reduced, and the PDU with a simple internal electrical circuit structure can be provided, and the electrical system 300 can be ensured to have a larger electrical safety gap, so that the safety performance of the PDU in high-frequency charging and discharging of a battery pack is improved.

Referring to fig. 1, the connector assembly 200 includes a heating connector 210, the heating connector 210 is connected to the first sidewall 111, and the positive and negative electrical modules 310 and 320 are respectively disposed on two sides of the heating connector 210 along a second predetermined direction.

Specifically, the heating connector 210 is connected to the middle of the first side wall 111.

In this way, the interface of the position of the heating connector 210 along the second preset direction can be used as an interface to separate the positive electrode electric module 310 from the negative electrode electric module 320, so as to avoid the intersection between the positive electrode circuit and the negative electrode circuit in the electric system 300, thereby ensuring that the electric system 300 has a larger electrical safety gap and improving the safety performance of the PDU during high-frequency charging and discharging of the battery pack.

Referring to fig. 1, the connector assembly 200 further includes a positive connector 220 and a negative connector 230, the positive connector 220 and the negative connector 230 are connected to the second sidewall 112, the positive connector 220 and the negative connector 230 are respectively disposed on two sides of the heating connector 210 along a second preset direction, one end of the positive electrical module 310 is electrically connected to the positive connector 220, and one end of the negative electrical module 320 is electrically connected to the negative connector 230.

Specifically, the positive connector 220 includes a high voltage box positive output connector (not shown) and a charging positive connector (not shown), both of which are electrically connected to one end of the positive electrical module 310; the negative electrode connector 230 includes a high voltage tank negative electrode output connector (not shown) and a charging negative electrode connector (not shown), both of which are electrically connected to one end of the negative electrode electrical module 320.

More specifically, referring to fig. 1, in one embodiment, the electrical system 300 further includes a water pump relay 330, the positive and negative electrical modules 310 and 320 are disposed on two sides of the water pump relay 330 along a second predetermined direction, the connector assembly 200 further includes a water pump connector 260, the water pump connector 260 is connected to a middle portion of the second sidewall 112, and the water pump connector is electrically connected to the water pump relay 330; the number of the high-voltage box positive electrode output connectors and the number of the charging positive electrode connectors can be multiple, and the number of the high-voltage box positive electrode output connectors and the number of the charging positive electrode connectors are all arranged on one side of the water pump connector 260, as shown in fig. 1, the number of the high-voltage box positive electrode output connectors and the number of the charging positive electrode connectors are two, wherein the number of the high-voltage box positive electrode output connectors is 2, the number of the charging positive electrode connectors is 1, and the number of the high-voltage box positive electrode output connectors is 1 from the direction from the near to the far from the water pump connector 260; the number of the high-voltage box negative electrode output connectors and the number of the charging negative electrode connectors can be multiple, and the multiple high-voltage box negative electrode output connectors and the multiple charging negative electrode connectors are all arranged on the other side of the water pump connector, as shown in fig. 1, the number of the high-voltage box negative electrode output connectors and the multiple charging negative electrode connectors are two, wherein the number 1 high-voltage box negative electrode output connectors, the number 1 charging negative electrode connectors, the number 2 charging negative electrode connectors and the number 2 high-voltage box negative electrode output connectors are respectively arranged in the direction from the near to the far from the water pump connector 260; therefore, the requirement of arranging more battery packs can be met.

In this way, the positive electrode connector 220 and the negative electrode connector 230 are respectively arranged at two sides of the heating connector 210 along the second preset direction, so that the positive electrode connector 220 and the negative electrode connector 230 can be arranged at intervals in cooperation with the positive electrode electric module 310 and the negative electrode electric module 320, and the integrity of the positive electrode circuit and the integrity of the negative electrode circuit can be increased, so that the PDU has a simpler and clearer structure and has stronger electric safety performance.

Referring to fig. 1, the connector assembly 200 further includes a first cluster connector 240 and a second cluster connector 250, the first cluster connector 240 and the second cluster connector 250 are both connected to the first sidewall 111, the first cluster connector 240 and the second cluster connector 250 are respectively disposed on two sides of the heating connector 210 along a second preset direction, and the other end of the positive electrical module 310 is electrically connected to the first cluster connector 240, and the other end of the negative electrical module 320 is electrically connected to the second cluster connector 250.

Specifically, the first cluster connector 240 is a cluster connector+, which is electrically connected to one end of the positive electrode electrical module 310 away from the positive electrode connector 220; the second cluster connector 250 is a cluster connector-that is electrically connected to an end of the negative electrical module 320 remote from the negative connector 230.

In the above embodiment, alternatively, there may be a plurality of cluster connectors+ and cluster connectors-each disposed on one side of the heating connector 210, as shown in fig. 1, wherein the cluster connectors+ are two, and the cluster connectors from the near to the far direction of the heating connector 210 are 2 cluster connectors+ and 1 cluster connector+ respectively; a plurality of cluster connectors, each disposed on the other side of the heating connector 210, as shown in fig. 1, wherein there are two cluster connectors, 1 cluster connector and 2 cluster connector, respectively, in a direction from near to far from the heating connector 210; therefore, the requirement of arranging more battery packs can be met.

It can be appreciated that, the first cluster connector 240 and the second cluster connector 250 are respectively disposed on two sides of the heating connector 210 along the second preset direction, and can be disposed at intervals of the positive electrode electrical module 310 and the negative electrode electrical module 320, so that a complete positive electrode circuit and a complete negative electrode circuit can be formed, and electrical elements of the positive electrode circuit and electrical elements of the negative electrode circuit are completely isolated in space, so that the electrical structure of the PDU is simple and clear, and the cross between the positive electrode circuit and the negative electrode circuit of the electrical system 300 can be further avoided, thereby ensuring that the electrical system 300 has a larger electrical safety gap, and improving the safety performance of the PDU during high-frequency charging and discharging of the battery pack.

Referring to fig. 1, the positive electrical module 310 includes a first loop charging relay 311, a positive relay 312 and a positive special-shaped copper bar assembly 313, wherein two ends of the first loop charging relay 311 are respectively electrically connected with the positive connector 220 and the positive relay 312 through the positive special-shaped copper bar assembly 313, and one end of the positive relay 312, which is far away from the first loop charging relay 311, is electrically connected with the first cluster connector 240 through the positive special-shaped copper bar assembly 313.

Specifically, the first loop charging relay 311 is a loop charging relay+.

Further, referring to fig. 3, the positive electrode special-shaped copper bar assembly 313 is provided with a first mounting hole 3131, and the first mounting hole 3131 is a kidney-shaped mounting hole, so as to meet more assembly requirements.

More specifically, in one embodiment, the positive electrode electrical module 310 further includes a pre-charge relay 314 and a pre-charge resistor 315, wherein the pre-charge relay 314 and the pre-charge resistor 315 are disposed on the same side of the heating connector 210 as the positive electrode relay 312, and the pre-charge relay 314 and the pre-charge resistor 315 are electrically connected to the positive electrode relay 312.

It can be appreciated that, in the case that the electrical components in the electrical system 300 are reasonably arranged in the most space-saving manner, the positive electrode special-shaped copper bar assembly 313 can bypass other electrical components in the height direction of the box 100, and connect the electrical components in the two positive electrode electrical modules 310 to be connected, so that the PDU can have a smaller size, so that the PDU has a smaller installation size when being installed on the heavy truck, and thus the requirements of smaller installation size and more battery packs can be simultaneously satisfied.

Referring to fig. 1, the negative electrode electrical module 320 includes a second loop charging relay 321, a negative electrode relay 322 and a negative electrode special-shaped copper bar assembly 323, wherein two ends of the second loop charging relay 321 are respectively electrically connected with the negative electrode connector 230 and the negative electrode relay 322 through the negative electrode special-shaped copper bar assembly 323, and one end of the negative electrode relay 322 far away from the second loop charging relay 321 is electrically connected with the second cluster connector 250 through the negative electrode special-shaped copper bar assembly 323.

Specifically, the second loop charge relay 321 is a loop charge relay-.

Further, referring to fig. 3, the negative electrode special-shaped copper bar assembly 323 is provided with a second mounting hole 3231, and the second mounting hole 3231 is a kidney-shaped mounting hole, so as to meet more assembly requirements.

More specifically, in one embodiment, the negative electrical module 320 further includes a hall sensor 324, the hall sensor 324 is disposed on the same side of the heater connector 210 as the negative relay 322, and the hall sensor 324 is electrically connected to the negative relay 322.

It can be appreciated that, in the case that the electrical components in the electrical system 300 are reasonably arranged in the most space-saving manner, the negative electrode special-shaped copper bar assembly 323 can bypass other electrical components in the height direction of the box 100, and connect the electrical components in the two negative electrode electrical modules 320 to be connected, so that the PDU can have a smaller size, so that the PDU has a smaller installation size when being installed on the heavy truck, and thus the requirements of smaller installation size and more battery packs can be simultaneously satisfied.

In addition, in one embodiment, the electrical system 300 further includes a thermal fuse 340, where the thermal fuse 340 is disposed between the positive electrical module 310 and the negative electrical module 320, so that the positive electrical module 310 can be further isolated from the negative electrical module 320 to ensure a large electrical safety gap.

Referring to fig. 1 and 2, the cavity wall of the accommodating cavity 110 further includes a third sidewall 114 and a fourth sidewall 115, the third sidewall 114 and the fourth sidewall 115 are disposed at intervals along the second preset direction, two ends of the third sidewall 114 are respectively connected with the first sidewall 111 and the second sidewall 112 in a sealing manner, two ends of the fourth sidewall 115 are respectively connected with the first sidewall 111 and the second sidewall 112 in a sealing manner, and the first sidewall 111, the second sidewall 112, the third sidewall 114 and the fourth sidewall 115 are respectively connected with the bottom wall 113 in a sealing manner.

It will be appreciated that the first side wall 111, the second side wall 112, the third side wall 114 and the fourth side wall 115 can be sealingly connected to form a closed end sealed side wall, and the sealed side wall and the bottom wall 113 can be sealingly connected to form the sealed accommodating cavity 110, so that the electrical system 300 disposed in the accommodating cavity 110 can have better waterproof and moistureproof properties, and thus the PDU has better electrical safety performance.

Further, the connector assembly 200 further includes a moisture-sensitive connector 270, in one embodiment, the moisture-sensitive connector 270 is connected to the first sidewall 111, and the moisture-sensitive connector 270 is disposed on the same side of the heating connector 210 as the first cluster connector 240, and there may be a plurality of moisture-sensitive connectors 270, and the moisture-sensitive connector 270 is used to absorb external moisture, so as to further enhance the waterproof performance of the PDU.

Still further, the electrical system 300 further includes a battery cluster management unit 350, wherein the battery cluster management unit 350 is disposed in the accommodating cavity 110, and the battery cluster management unit 350 is close to the fourth sidewall 115, so as to facilitate the external connection of the battery clusters and perform daily management and monitoring of the battery clusters.

Specifically, the case 100 is folded by sheet metal to form a first side wall 111, a second side wall 112, a third side wall 114, and a fourth side wall 115.

It should be noted that, the metal plate is a comprehensive cold working process for a metal sheet (generally, the thickness is less than 6 mm), and the cavity wall of the accommodating cavity 110 formed by bending the metal plate has an integrity, so that better sealing performance can be realized, and the waterproof performance of the PDU is further enhanced.

Further, referring to fig. 2, in one embodiment, the first side wall 111 and the second side wall 112 are provided with a third mounting hole 130, the plug assembly is connected to the first side wall 111 and the second side wall 112 through the third mounting hole 130, and a blind nut post 140 is disposed around the third mounting hole 130 for fixing the plug assembly 200 on the first side wall 111 and the second side wall 112, and at the same time, the blind nut post 140 can reduce the holes on the first side wall 111 and the second side wall 112, so as to avoid the influence of excessive holes on the waterproof performance of the PDU.

Referring to fig. 2, the case 100 further includes a spring handle 120, and the spring handles 120 are disposed on the third sidewall 114 and the fourth sidewall 115; wherein the spring handle 120 is in a first position with the spring 121 of the spring handle 120 in a non-deformed state and the spring handle 120 is in a second position with the spring 121 of the spring handle 120 in a compressed state.

Specifically, the first position is the position where the spring handle 120 is located in fig. 2, i.e. the position where it sags and clings to the third side wall 114 and the fourth side wall 115, and the second position is any position where the operator lifts the spring handle 120 from the third side wall 114 and the fourth side wall 115 and away from the third side wall 114 and the fourth side wall 115.

Thus, referring to fig. 4, one end of the spring 121 is connected to the connection portion between the spring handle 120 and the side wall, the other end of the spring 121 is connected to the handle 122, and when the spring 121 is in a non-deformed state, the pre-tightening force of the spring 121 can tightly attach the handle 122 to the side wall, so that abnormal noise caused by collision between the spring handle 120 and the side wall during driving of the heavy truck can be avoided.

The heavy truck according to an embodiment of the present utility model includes a dual-tributary PDU as described above.

In the heavy truck, the double-branch PDU can improve the safety performance of the PDU when the heavy truck battery Bao Gaopin is charged and discharged, so that the heavy truck has stronger safety when being charged and driven.

Any particular values in all examples shown and described herein are to be construed as merely illustrative and not a limitation, and thus other examples of exemplary embodiments may have different values.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

The above examples merely represent a few embodiments of the present utility model, which are described in more detail and are not to be construed as limiting the scope of the present utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model.

Claims (10)

1. A dual-leg PDU comprising:

the box body is provided with a containing cavity, the cavity wall of the containing cavity comprises a first side wall, a second side wall and a bottom wall, the first side wall and the second side wall are arranged at intervals along a first preset direction, and the first side wall and the second side wall are connected to the bottom wall;

the plug-in assembly is connected with the first side wall and the second side wall respectively;

the electric system comprises an anode electric module and a cathode electric module, the anode electric module and the cathode electric module are all installed on the bottom wall, two ends of the anode electric module and two ends of the cathode electric module are electrically connected with the plug-in assembly, and the cathode electric module and the anode electric module are arranged at intervals along a second preset direction;

the second preset direction and the first preset direction are arranged in an angle.

2. The dual leg PDU of claim 1, wherein the connector assembly includes a heater connector attached to the first side wall, the positive electrical module and the negative electrical module being disposed on opposite sides of the heater connector along the second predetermined direction.

3. The dual-branch PDU of claim 2, wherein the connector assembly further comprises a positive connector and a negative connector, wherein the positive connector and the negative connector are connected to the second side wall, the positive connector and the negative connector are respectively disposed on two sides of the heating connector along the second preset direction, one end of the positive electrical module is electrically connected to the positive connector, and one end of the negative electrical module is electrically connected to the negative connector.

4. The dual-branch PDU of claim 3, wherein the connector assembly further comprises a first cluster connector and a second cluster connector, the first cluster connector and the second cluster connector are connected to the first side wall, the first cluster connector and the second cluster connector are respectively arranged at two sides of the heating connector along the second preset direction, the other end of the positive electrode electric module is electrically connected with the first cluster connector, and the other end of the negative electrode electric module is electrically connected with the second cluster connector.

5. The dual-branch PDU of claim 4, wherein the positive electrical module comprises a first loop charging relay, a positive electrode relay and a positive electrode special-shaped copper bar assembly, wherein two ends of the first loop charging relay are respectively electrically connected with the positive electrode connector and the positive electrode relay through the positive electrode special-shaped copper bar assembly, and one end of the positive electrode relay, which is far away from the first loop charging relay, is electrically connected with the first cluster connector through the positive electrode special-shaped copper bar assembly.

6. The dual-branch PDU of claim 4, wherein the negative electrode electrical module comprises a second loop charging relay, a negative electrode relay and a negative electrode special-shaped copper bar assembly, wherein two ends of the second loop charging relay are respectively electrically connected with the negative electrode connector and the negative electrode relay through the negative electrode special-shaped copper bar assembly, and one end of the negative electrode relay away from the second loop charging relay is electrically connected with the second cluster connector through the negative electrode special-shaped copper bar assembly.

7. The PDU of claim 1, wherein the cavity wall of the accommodating cavity further comprises a third side wall and a fourth side wall, the third side wall and the fourth side wall are arranged at intervals along the second preset direction, two ends of the third side wall are respectively in sealing connection with the first side wall and the second side wall, two ends of the fourth side wall are respectively in sealing connection with the first side wall and the second side wall, and the first side wall, the second side wall, the third side wall and the fourth side wall are respectively in sealing connection with the bottom wall.

8. The dual leg PDU of claim 7, wherein the housing is folded from sheet metal into the first side wall, the second side wall, the third side wall and the fourth side wall.

9. The dual leg PDU of claim 7, wherein said case further includes a spring handle, said spring handle being disposed on each of said third side wall and said fourth side wall;

wherein the spring handle is in a first position when the spring of the spring handle is in a non-deformed state and in a second position when the spring of the spring handle is in a compressed state.

10. A heavy duty card comprising: the dual-leg PDU of any one of claims 1 to 9.