CN219180955U

CN219180955U - Power distribution unit

Info

Publication number: CN219180955U
Application number: CN202320182134.4U
Authority: CN
Inventors: 廖恒忠; 刘辉
Original assignee: Tiecheng Information Technology Co ltd
Current assignee: Tiecheng Information Technology Co ltd
Priority date: 2023-02-10
Filing date: 2023-02-10
Publication date: 2023-06-13
Anticipated expiration: 2033-02-10

Abstract

The present utility model relates to a power distribution unit. The utility model provides a power distribution unit, includes casing, relay and fuse, casing one side is equipped with the circuit board, the relay is connected with the circuit board electricity and is fixed on the circuit board, the fuse sets up at the casing opposite side, the casing is embedded to be equipped with conductive post, conductive post one end is connected with the fuse electricity, the conductive post other end with the circuit board electricity is connected. The utility model has the advantage that the electric connection between the fuse and the relay can be realized without adopting wires, can eliminate the hidden trouble of line interference and avoid the problem of wiring harness installation errors.

Description

Power distribution unit

Technical Field

The present utility model relates to a power distribution unit.

Background

The PDU (Power Distribution Unit ) is a product designed to provide power distribution for electrical devices, has multiple series specifications of different functions, mounting patterns and different plug-in combinations, and can provide suitable distribution solutions for different power supply environments.

The power distribution unit comprises a relay, a fuse and other parts, in the design process, a copper bar is used for connecting a large current loop (such as a battery, an MCU (micro control unit) and a quick charging loop), most of the small current loop is electrically connected with the relay and the fuse by a wire harness, the wire harness is too many, the space is insufficient in the whole layout, the wire harness is disordered, the risk of broken skin of the wire harness is caused due to friction between the wire harness and the copper bar, and the wire harness is easy to install and misplaced, so that the product has potential safety hazards.

The Chinese patent with application number 201911057696.0 discloses a novel PDU structure, including PCB board, relay, fuse, electricity isolation board and grafting part, relay, electricity isolation board and grafting part set up on the PCB board, and the fuse sets up in the electricity isolation board and welds with the PCB board, and grafting part includes PDU socket and bayonet socket, and the PDU socket passes through port interface welding on the PCB board, and bayonet socket and PDU socket assorted, PDU socket reaches the bayonet socket is with circuit board and other circuit components and parts stable connection forms specific power distribution module. The PCB comprises an outer surface layer and a wire harness, wherein the wire harness is buried in the outer surface layer, a relay interface, a port interface, a power isolation plate interface and a fuse interface are arranged on the outer surface layer, the relay is inserted in the relay interface and contacts with the wire harness, pins of the inserting component are inserted in the port interface and contact with the wire harness, the power isolation plate is inserted on the power isolation plate interface, and pins of the fuse are inserted in the fuse interface and contact with the wire harness.

In the scheme, through hiding the wire harness in the PCB, then set up fuse and relay on the PCB to realize the electric connection between fuse and the relay, eliminate the hidden danger of circuit interference, and avoid the wrong problem of wire harness installation to produce, but there is the technological requirement higher, and the part is more troublesome with the wire electric connection, and design and manufacturing cost increase greatly, and the production assembly is more troublesome defect.

Disclosure of Invention

The utility model aims to provide a power distribution unit which does not need a wire harness to electrically connect a fuse with a relay and can reduce the production and assembly cost.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a power distribution unit, includes casing, relay and fuse, casing one side is equipped with the circuit board, the relay is connected with the circuit board electricity and is fixed on the circuit board, the fuse sets up at the casing opposite side, the casing is embedded to be equipped with conductive post, conductive post one end is connected with the fuse electricity, the conductive post other end with the circuit board electricity is connected.

According to the utility model, the conductive post is arranged to replace a conventional wire, so that the conductive post is electrically connected with the fuse and the circuit board as long as the fixation of the circuit board and the shell and the fixation of the fuse and the shell are completed, the wire is not needed to realize the electrical connection of the fuse and the relay on the circuit board, the number of wires can be reduced, the electrical connection of the wires and the negative copper bar used for connecting the product electricity utilization unit can be reduced as much as possible, the hidden trouble of circuit interference is eliminated, and the problem of wiring harness installation error is avoided.

The conductive column is fixedly connected with the shell, the process requirement is lower than that required by hiding the wires on the circuit board, and the complicated electrical connection between the wires and various interfaces is not required, so that the design, production and assembly costs can be greatly reduced.

The relay and the fuse are arranged on two sides of the shell, so that space lamination utilization can be realized, the relay and the fuse do not need to be arranged on the circuit board, and the occupied space in the horizontal direction is smaller; meanwhile, other parts can be mounted on the shell, the shell is convenient to take and assemble, and modularization can be achieved.

Preferably, the end part of the conductive post is matched with a fastener, the fastener is provided with a limiting end, the fastener is fixed with the conductive post, and the circuit board is limited between the limiting end of the fastener and the conductive post; and/or the fuse has a conductive portion for electrical connection with the conductive post, the fastener being secured with the conductive post such that the conductive portion is trapped between the spacing end of the fastener and the conductive post.

In the scheme of the utility model, the circuit board, the shell and the conductive part can be assembled and fixed only by assembling the fasteners, and meanwhile, the electric connection between the circuit board and the fuse can be realized, so that the production operation and the assembly are simpler.

Preferably, the conductive column is provided with a matching hole penetrating axially, the inner wall of the matching hole and the outer wall of the fastener are provided with mutually matched thread structures, and the circuit board or the conductive part is provided with a through hole for the passage of one end of the fastener with the external thread structure.

The conductive column is provided with a matching hole, the circuit board and the conductive part are provided with through holes, and only the holes are aligned with the holes, then the electric connection and the assembly fixation can be realized simultaneously by performing threaded matching of the fasteners, so that the production operation difficulty can be further reduced.

Preferably, the circuit board is provided with a conductive sheet, and the end face of the conductive column is in contact with and electrically connected with the conductive sheet.

Through setting up the bigger conducting strip of area to the electric contact area between conductive post and the circuit board of being convenient for guarantees the stability of circuit. The conductive sheet can be made of copper foil, and the copper foil can be welded and fixed on the circuit board by any conventional mode.

Preferably, the housing is formed with a housing chamber for housing the relay and opening to one side, and the circuit board is disposed at the opening of the housing chamber.

The arrangement can enable the structure of the utility model to be more compact, occupy smaller space and be more convenient for realizing the modularization of the utility model. The relay is positioned in the accommodating cavity, and the opening of the accommodating cavity is provided with the circuit board, so that the protection effect of the relay can be improved; meanwhile, the fuse is located outside the accommodating cavity, so that the fuse is convenient to replace.

Preferably, a positioning groove is formed in the outer wall of the conductive column, and the shell is provided with a positioning part extending into the positioning groove; the positioning groove is annular.

The plastic shell embedded with the conductive column can be obtained by injection molding on the outer side of the conductive column, and the production process requirement is low. Wherein, the setting of constant head tank is in order to be used for avoiding taking place to break away from between conductive post and the casing, and annular constant head tank can further improve the fixed effect between conductive post and the casing, further avoids conductive post to break away from the casing.

Preferably, the shell is further provided with a power connection column, one end of the power connection column is electrically connected with the circuit board, the structure of the power connection column is identical to that of the conductive column, the other end of the power connection column is in threaded fit with a power connection bolt, and the power connection bolt and the fuse are located on the same side of the shell.

Not only can adopt conductive column to carry out electric connection between fuse and the relay, also can adopt and connect the electric column that connects the same with conductive column structure to carry out electric connection between circuit board and the electric bolt, further reduce the connection of pencil, further avoid pencil installation mistake. Meanwhile, the power connection bolt and the fuse are positioned on the same side of the shell, so that the negative electrode copper bar and the positive electrode lead are positioned at the same height, and subsequent assembly and use are facilitated.

The utility model has the advantages that the electric connection between the fuse and the relay can be realized without adopting wires, the hidden trouble of line interference can be eliminated, and the problem of wiring harness installation error can be avoided; the operation of electrically connecting the lead and other parts is reduced, and only the holes are aligned and then the fasteners are installed, so that the assembly of the utility model is more convenient, and the production operation difficulty is reduced; meanwhile, the utility model has the advantages of lower space occupation in the horizontal direction and convenient modularization realization.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

Fig. 2 is a cross-sectional view of the utility model at a conductive post.

Fig. 3 is a cross-sectional view of the utility model at the power post.

Detailed Description

The utility model is further described below with reference to the drawings and specific embodiments.

As shown in fig. 1 to 3, the present embodiment discloses a power distribution unit, including a housing 1, wherein three fuses 2 are provided on one side of the housing 1, the housing 1 is provided with a housing cavity 11 opened to the other side, a relay 3 is provided in the housing cavity, a circuit board 4 is provided at an opening of the housing cavity 11, and pins of the relay 3 are electrically connected to the circuit board 4 and fix the relay 3 and the circuit board 4. Wherein, three fuses 2 card is established on the cassette 21 of casing 1, and three fuse 2 one end passes through copper sheet 13 and connects the power positive pole, and the other end of three fuse 2 is connected with circuit board 4 electricity through electrically conductive portion 22 and conductive post 5.

As shown in fig. 2, the conductive post 5 is embedded in the housing 1, one end of the conductive post 5 is electrically connected to the fuse 2, and the other end of the conductive post 5 is electrically connected to the circuit board 4. The conductive column 5 is arranged on the shell 1 in an injection molding mode, the conductive column 5 of the embodiment is a copper column, an annular positioning groove is formed in the outer wall of the conductive column 5, and after injection molding is completed, the shell is provided with a positioning part 12 extending into the positioning groove.

The conductive column 5 is of a hollow columnar structure so as to be provided with a matching hole 51 penetrating axially, the two ends of the conductive column 5 are respectively matched with a fastening piece 52, the fastening piece 52 is provided with a limiting end 521, the inner wall of the matching hole 51 and the outer wall of the position, deviated from the limiting end 521, of the fastening piece 52 are provided with mutually matched thread structures, and the circuit board 4 and the conductive part 22 are respectively provided with a through hole for the passage of one end, provided with an external thread structure, of the fastening piece.

The fastener on one side of the housing 1 passes through the through hole of the circuit board 4 and then is screwed with the conductive post, so that the circuit board 4 is limited between the limiting end 521 of the fastener and the conductive post 5, and the fastener on the other side of the housing 1 passes through the through hole of the conductive part 22 and then is screwed with the other end of the conductive post, so that the conductive part 22 is limited between the limiting end 521 of the fastener and the conductive post 4. The circuit board 4 of the present embodiment is provided with a conductive sheet (not shown) made of copper, and after the circuit board 4 is fixed to the housing 1, the end face of the conductive post 5 is in contact with and electrically connected to the conductive sheet.

As shown in fig. 1 and 3, the casing 1 is further provided with a power receiving column 6, the shape, structure and size of the power receiving column 6 in this embodiment are the same as those of the conductive column 5, one end of the power receiving column 6 is electrically connected with the circuit board 4, the other end of the power receiving column 6 is in threaded fit with a power receiving bolt 61, the power receiving bolt 61 and the fuse 2 are located on the same side of the casing 1, and the power receiving bolt 61 is in threaded fit with the power receiving column 6 and is used for fixing and electrically connecting the negative copper bar.

When the power distribution unit is used, battery current enters from the copper sheet 13, passes through the fuse breaker 2, then passes through the conductive post 5 on the other side of the fuse breaker 2 to the relay end 3 on the circuit board 4, then passes through the copper foil on the circuit board 4 to the power connection post 6, and finally passes through the power connection bolt 62 and the negative copper bar to be externally supplied to the power utilization unit.

Claims

1. A power distribution unit, includes casing, relay and fuse, its characterized in that: the utility model provides a circuit board, the relay is connected and is fixed on the circuit board with the circuit board electricity, the fuse sets up at the casing opposite side, its characterized in that: the shell is embedded with a conductive column, one end of the conductive column is electrically connected with the fuse, and the other end of the conductive column is electrically connected with the circuit board.

2. The power distribution unit of claim 1, wherein: the end part of the conductive column is matched with a fastener, the fastener is provided with a limiting end, and the fastener is fixed with the conductive column and enables the circuit board to be limited between the limiting end of the fastener and the conductive column; and/or the fuse has a conductive portion for electrical connection with the conductive post, the fastener being secured with the conductive post such that the conductive portion is trapped between the spacing end of the fastener and the conductive post.

3. The power distribution unit of claim 2, wherein: the conductive column is provided with an axially penetrating matching hole, the inner wall of the matching hole and the outer wall of the fastener are provided with mutually matched thread structures, and the circuit board or the conductive part is provided with a through hole for one end of the fastener with an external thread structure to pass through.

4. A power distribution unit according to claim 1 or 2 or 3, characterized in that: and the circuit board is provided with a conductive sheet, and the end face of the conductive column is in contact with and electrically connected with the conductive sheet.

5. A power distribution unit according to claim 1 or 2 or 3, characterized in that: the housing is formed with a housing cavity for housing the relay and opening to one side, and the circuit board is arranged at the opening of the housing cavity.

6. A power distribution unit according to claim 1 or 2 or 3, characterized in that: the outer wall of the conductive column is provided with a positioning groove, and the shell is provided with a positioning part extending into the positioning groove; the positioning groove is annular.

7. A power distribution unit according to claim 3, characterized in that: the shell is further provided with a power connection column, one end of the power connection column is electrically connected with the circuit board, the shape structure of the power connection column is identical to that of the conductive column, the other end of the power connection column is in threaded fit with a power connection bolt, and the power connection bolt and the fuse are located on the same side of the shell.