Power distribution circuit and assembly structure thereof

Abstract

The utility model provides a power distribution circuit and an assembly structure thereof. The storage battery, the step-down module, the control module, the safety module and the port module are connected, the storage battery is connected with the control module and the voltage module, the step-down module reduces 48V voltage of the storage battery into 24V voltage and 5V voltage and then is connected with the safety module, and the safety module is connected with the port module. According to the utility model, the main power switch direct current contactor on the automobile is integrated in the control box, so that a user does not need to consider the installation position of the direct current contactor on the automobile; each fuse of the power supply distribution box for the product loading vehicle is independently provided with a diode alarm prompt, when the product fuse fails, the switch-on state indicating lamp is turned off, and the switch-off state indicating lamp is turned on, so that a user can quickly check and replace the fuse loss of the product, and the troubleshooting is greatly improved.

Description

Technical Field

[0001] The utility model relates to a power distribution circuit and an assembly structure thereof. Background Art

[0002] There are many components in the vehicle that need to be powered and controlled, and they require a variety of different voltages. The existing control and power supply methods use power conversion and controllers to control the vehicle respectively, which makes the internal power supply structure of the vehicle complex and difficult to maintain. It is necessary to simplify and integrate the vehicle power distribution circuit and internal components, such as the electric vehicle power distribution unit structure with publication number CN205970913U, which integrates the scattered high-voltage electrical system together, and realizes the high-voltage power distribution function, overcurrent protection function, and pre-charging function through the relays, fuses, connectors and other components. Make the high-voltage electrical system have high-quality reliability and safety, and achieve high-quality sealing performance. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a power distribution circuit and an assembly structure thereof.

[0004] The utility model is realized through the following technical solutions.

[0005] The utility model provides a power distribution circuit and its assembly structure; a battery, a step-down module, a control module, a fuse module, and an electrical port module. The battery is connected to the control module and the voltage module respectively, the step-down module reduces the 48V voltage of the battery to 24V and 5V voltages respectively and then connects to the fuse module, and the fuse module is connected to the port module.

[0006] The step-down module includes a DC / DC regulator G2 and a DC / DC regulator G3 which are respectively connected to the positive and negative electrodes of the battery.

[0007] The insurance module includes a plurality of fuses, which are connected in parallel to the positive pole of the output end of the DC / DC regulator G2, and the rear pole of each fuse is respectively connected to the wiring port in the port module.

[0008] A plurality of control contacts of relays are connected in parallel to one wiring port, a load and a diode are connected in parallel to the other ends of the control contacts of the plurality of relays, and the coils of the plurality of relays are connected to the controller respectively.

[0009] The control module comprises a DC contactor KM1 and a vehicle-mounted relay control group. The DC contactor KM1 and the relays in the vehicle-mounted relay control group are connected in series between the positive and negative electrodes of the battery.

[0010] The coil of the DC contactor KM1 is also connected in parallel with the coil of the relay KA3, the normally open contact of the relay KA3 is connected in series with the resistor R21, and the two ends of the series connection are respectively connected in parallel with the normally open contact of the DC contactor KM1 and the diode D3.

[0011] The positive and negative electrodes of the battery are also connected to an overvoltage protection module respectively, and a 100W resistor R22 is connected to the overvoltage protection module.

[0012] A vehicle power distribution circuit assembly structure; comprising a box body and electrical components inside the box body, a mounting plate is mounted on the bottom of the box body through a plurality of support frames, a direct contactor and an isolation chamber are mounted on the mounting plate, a controller, a second voltage reducer, a circuit board, a first voltage reducer, a fuse group, a W resistor, and a relay group are mounted in the isolation chamber, power waterproof terminals and wiring terminals are mounted on opposite sides of the box body, respectively, and the power waterproof terminals and wiring terminals are connected to the electrical components in the box body through copper bars.

[0013] The isolation chamber is fixed on the current limiting resistor by screws, and the isolation chamber is divided into an upper and lower space by a partition. The first step-down device is installed in the lower space of the isolation chamber, the controller is installed in the upper space, and the second step-down device, the insurance group, and the W resistor are installed on the top of the isolation chamber.

[0014] The side wall of the isolation chamber and the partition plate therein are both processed with through holes.

[0015] The beneficial effects of the utility model are:

[0016] 1) The DC contactor of the main power switch on the car is integrated in the control box, so the user no longer needs to consider the installation position of the DC contactor on the vehicle;

[0017] 2) Each fuse in the power distribution box for vehicle loading is equipped with a diode alarm. When the fuse fails, an alarm will sound. The connected status indicator light will go out, and the disconnected status indicator light will light up. Users can quickly check and replace the fuse damage, which greatly improves fault inspection and repair;

[0018] 3) The relays attached to the vehicle power distribution module device of the product are equipped with freewheeling diodes, which can effectively prevent the extremely high reverse voltage from being generated when the relay is disconnected, causing damage to the product and the vehicle;

[0019] 4) Compared with similar functional products, the vehicle-mounted power distribution box has a reasonable structure design, small size, light weight, complete functions and beautiful appearance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the internal structure of the utility model;

[0021] Figure 2 It is a side structural schematic diagram of the utility model;

[0022] Figure 3 It is a schematic diagram of the circuit structure of the utility model;

[0023] In the figure: 1-box, 2-overvoltage protector, 3-first voltage reducer, 4-overcurrent protector, 5-controller, 6-second voltage reducer, 7-circuit board, 8-isolation chamber, 9-vehicle insurance, 10-direct contactor, 11-power waterproof terminal, 12-support frame, 13-current limiting resistor, 14-insurance group, 15-100W resistor, 16-relay group, 17-copper busbar, 18-wiring terminal, 19-mounting plate, 20-cover mounting screws. DETAILED DESCRIPTION

[0024] The technical solution of the utility model is further described below, but the scope of protection required is not limited to the description.

[0025] like Figure 3 As shown, a power distribution circuit and its assembly structure; a battery, a step-down module, a control module, a fuse module, and an electrical port module. The battery is connected to the control module and the voltage module respectively. The step-down module reduces the 48V voltage of the battery to 24V and 5V respectively and then connects to the fuse module. The fuse module is connected to the port module. When the product connector is connected to the power supply, the DC contactor KM1 coil is turned on and off, the direct contactor KM1 main contact is closed, and the power distribution box for the loading vehicle is in the power-on state. When each terminal triggers an electrical signal, the corresponding normally open relay will be in the working state, which plays a role in controlling the normal operation of each circuit of the car.

[0026] The step-down module includes a DC / DC regulator G2 and a DC / DC regulator G3 which are respectively connected to the positive and negative electrodes of the battery.

[0027] The insurance module includes a plurality of fuses, which are connected in parallel to the positive pole of the output end of the DC / DC regulator G2, and the rear pole of each fuse is respectively connected to the wiring port in the port module.

[0028] A plurality of control contacts of relays are connected in parallel to one wiring port, a load and a diode are connected in parallel to the other ends of the control contacts of the plurality of relays, and the coils of the plurality of relays are connected to the controller respectively.

[0029] The control module comprises a DC contactor KM1 and a vehicle-mounted relay control group. The DC contactor KM1 and the relays in the vehicle-mounted relay control group are connected in series between the positive and negative electrodes of the battery.

[0030] The coil of the DC contactor KM1 is also connected in parallel with the coil of the relay KA3, the normally open contact of the relay KA3 is connected in series with the resistor R21, and the two ends of the series connection are respectively connected in parallel with the normally open contact of the DC contactor KM1 and the diode D3.

[0031] The positive and negative electrodes of the battery are also connected to an overvoltage protection module respectively, and a 100W resistor R22 is connected to the overvoltage protection module.

[0032] like Figure 1 and 2 As shown, a vehicle power distribution circuit assembly structure comprises a box body 1 and electrical components therein, a mounting plate 19 is mounted on the bottom of the box body 1 through a plurality of support frames 12, a direct contactor 10 and an isolation chamber 8 are mounted on the mounting plate 19, a controller 5, a second voltage reducer 6, a circuit board 7, a first voltage reducer 3, a fuse group 14, a W resistor 15, and a relay group 16 are mounted in the isolation chamber 8, power waterproof terminals 11 and wiring terminals 18 are mounted on opposite sides of the box body 1, respectively, and the power waterproof terminals 11 and the wiring terminals 18 are connected to the electrical components in the box body 1 through a copper bus 17.

[0033] The isolation chamber 8 is fixed to the current limiting resistor 13 by screws, and the isolation chamber 8 is divided into two layers of space, the upper and lower layers, by a partition. The first step-down device 3 is installed in the lower space of the isolation chamber 8, the controller 5 is installed in the upper space, and the second step-down device 6, the insurance group 14, and the W resistor 15 are installed on the top of the isolation chamber 8.

[0034] The side walls of the isolation chamber 8 and the partitions therein are both provided with through holes.

[0035] In this embodiment, all electrical control components for the vehicle (such as relays, flash turners, etc.), fuses (including LED lights and alarm buzzers, etc.) are assembled into an assembly through a printed circuit board, a wiring harness and a box body. This assembly is connected to the wiring harness through a standard connector to facilitate centralized control of all electrical components, thereby simplifying the circuit, facilitating maintenance and troubleshooting.

[0036] There are 9 control relays, including starting relay, pre-charge relay, buzzer relay, lighting relay, fan relay, flash relay, main power switch DC contactor and reserved relay. It is very different from the general distribution box. First, the distribution box integrates the DC contactor in the distribution box for the main control switch, and the user does not need to install the relevant starting DC contactor; second, the distribution box has a certain waterproof function, and the protection level is IP54. Third, it uses a double-sided printed circuit board, and the shell is made of metal material sprayed with flame-retardant insulating paint. It has the performance of temperature and humidity cycle resistance, vibration resistance, and high temperature insulation performance in line with national standards.

[0037] Main technical indicators: (1) Physical dimensions of the power distribution module: 220mm×160mm×697mm; (2) Rated voltage: 48V DC; (3) Number of relays: 8. (4) 1 DC contactor, 1 motion controller. (5) 9 on-board fuses, 1 voltage reducer, 2 overcurrent protectors.

Claims

1. A power distribution circuit, characterized in that: A battery, a step-down module, a control module, a fuse module, and an electrical port module. The battery is connected to the control module and the voltage module respectively. The step-down module reduces the 48V voltage of the battery to 24V and 5V respectively and then connects to the fuse module. The fuse module is connected to the port module. The step-down module includes a DC / DC regulator G2 and a DC / DC regulator G3 respectively connected to the positive and negative poles of the battery. The fuse module includes a plurality of fuses, which are connected in parallel to the positive pole of the output end of the DC / DC regulator G2, and the rear pole of each fuse is respectively connected to the wiring port in the port module.

2. The power distribution circuit according to claim 1, wherein: A plurality of control contacts of relays are connected in parallel to one wiring port, a load and a diode are connected in parallel to the other ends of the control contacts of the plurality of relays, and the coils of the plurality of relays are connected to the controller respectively.

3. The power distribution circuit according to claim 1, wherein: The control module comprises a DC contactor KM1 and a vehicle-mounted relay control group. The DC contactor KM1 and the relays in the vehicle-mounted relay control group are connected in series between the positive and negative electrodes of the battery.

4. The power distribution circuit according to claim 3, wherein: The coil of the DC contactor KM1 is also connected in parallel with the coil of the relay KA3, the normally open contact of the relay KA3 is connected in series with the resistor R21, and the two ends of the series connection are respectively connected in parallel with the normally open contact of the DC contactor KM1 and the diode D3.

5. The power distribution circuit according to claim 1, wherein: The positive and negative electrodes of the battery are also connected to an overvoltage protection module respectively, and a 100W resistor R22 is connected to the overvoltage protection module.

6. An assembly structure of a power distribution circuit, characterized in that: The invention comprises a box (1) and electrical components therein. A mounting plate (19) is mounted on the bottom of the box (1) via a plurality of support frames (12). A direct contactor (10) and an isolation chamber (8) are mounted on the mounting plate (19). A controller (5), a second voltage reducer (6), a circuit board (7), a first voltage reducer (3), a fuse group (14), a W resistor (15), and a relay group (16) are mounted in the isolation chamber (8). Power waterproof terminals (11) and wiring terminals (18) are mounted on opposite sides of the box (1). The power waterproof terminals (11) and the wiring terminals (18) are connected to the electrical components in the box (1) via copper bars (17).

7. The power distribution circuit assembly structure as claimed in claim 6, characterized in that: The isolation chamber (8) is fixed to the current limiting resistor (13) by means of screws. The isolation chamber (8) is divided into an upper and lower space by means of a partition. The first voltage reducer (3) is installed in the lower space of the isolation chamber (8), the controller (5) is installed in the upper space, and the second voltage reducer (6), the insurance group (14), and the W resistor (15) are installed on the top of the isolation chamber (8).

8. The power distribution circuit assembly structure as claimed in claim 7, characterized in that: The side walls of the isolation chamber (8) and the partition plates therein are both provided with through holes.

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