Integrated new energy CAN communication top-mounted high-voltage distribution box

Abstract

The utility model discloses an integrated new energy CAN communication top-mounted high-voltage distribution box, which comprises a box body and a plurality of electric device mounting grooves arranged on the upper surface of the box body, electric devices in one-to-one correspondence with the electric device mounting grooves are arranged in the electric device mounting grooves, and a plurality of high-voltage connecting cable outlets are arranged on the side surface of the box body. High-voltage connecting cables in one-to-one correspondence with the high-voltage connecting cable outlets are arranged in the high-voltage connecting cable outlets, and the high-voltage connecting cables are electrically connected with the electric device. The integrated new energy CAN communication top-mounted high-voltage distribution box is compact in structure, reasonable in layout and convenient to maintain, and can realize the function of protecting a motor.

Description

Technical field:

[0001] The utility model relates to an integrated new energy CAN communication mounted high-voltage distribution box, which belongs to the technical field of new energy vehicles. Background technology:

[0002] With the popularity of new energy vehicles, the design and optimization of their internal electrical systems have become increasingly important. Among them, high-voltage boxes, as important safety components in new energy vehicles, need to be efficient, safe, and reliable. At the same time, with the increasing degree of automotive electronics, CAN communication is being used more and more widely in automobiles. Therefore, integrating CAN communication with high-voltage boxes can improve the intelligence and safety of vehicles. Utility model content:

[0003] The utility model is to solve the problems existing in the above-mentioned prior art and to provide an integrated new energy CAN communication mounted high-voltage distribution box, which has a compact structure, a reasonable layout and is easy to maintain.

[0004] The technical solutions adopted by the utility model include: an integrated new energy CAN communication upper-mounted high-voltage distribution box, comprising a box body and a plurality of electrical component mounting grooves arranged on the upper surface of the box body, wherein the electrical component mounting grooves are provided with electrical components corresponding one-to-one to the electrical component mounting grooves, and the side of the box body is provided with a plurality of high-voltage connection cable outlets, wherein the high-voltage connection cable outlets are provided with high-voltage connection cables corresponding one-to-one to the high-voltage connection cable outlets, and the high-voltage connection cables are electrically connected to the electrical components.

[0005] Furthermore, the electrical component installation slot is equipped with a first pre-charge relay K1, a first main relay K2, a second pre-charge relay K3, a second main relay K4, a first high-voltage fuse, a second high-voltage fuse and a third high-voltage fuse. The side wall of the box body is equipped with a battery positive, a battery negative, an A top, a B top, a C top, a first pre-charge resistor and a second pre-charge resistor. The box body is equipped with a HCM high-voltage control module and a low-voltage communication interface. The pin J4-1V+ of the HCM high-voltage control module is connected to the pin J4-13V+ and then connected to the 24V positive. The pin J4-2V- of the HCM high-voltage control module is connected to the pin J4-14V- and then connected to the 24V negative. The pin J4-3D01H of the HCM high-voltage control module is connected to the coil foot of the first main relay K2. The pin J4-4D03H of the HCM high-voltage control module is connected to the line foot of the first pre-charge relay K1. The pins are connected to each other, the pin J4-81H of the HCM high-voltage control module is connected to CANH, the pin J4-15D02H of the HCM high-voltage control module is connected to the coil pin of the second main relay K4, the pin J4-16D04H of the HCM high-voltage control module is connected to the coil pin of the second pre-charge relay K3, the pin J4-201L of the HCM high-voltage control module is connected to CANL, the pin J4-24GND of the HCM high-voltage control module is grounded, the pin J3-1HV+1 of the HCM high-voltage control module is connected to the contact point between the first pre-charge relay K1 and the first main relay K2 through a wire to detect the voltage, the pin J3-13HV- and the pin J3-16HV+ of the HCM high-voltage control module are both connected to HV+ to detect the voltage value, and the pin J3-19HV+2 of the HCM high-voltage control module is connected to the rear end voltage of the second main relay K4.

[0006] Furthermore, after the battery is connected to HV+, two branches are connected in parallel between it and HV+1, one branch is a branch in which the first pre-charging resistor and the first pre-charging relay K1 are connected in series, and the other branch is a branch in which the first high-voltage fuse and the first main relay K2 are connected in series, and HV+ is connected to A.

[0007] Furthermore, two branches are connected in parallel between HV+ and HV+2, one branch is a branch where the second pre-charging resistor and the second pre-charging relay K3 are connected in series, and the other branch is a branch where the second main relay K4 is located.

[0008] Furthermore, HV+2 is connected in series with a second high-voltage fuse and then connected to the positive side of B.

[0009] Furthermore, HV+2 is connected in series with a third high-voltage fuse and then connected to C, and the negative of the battery is connected to the negative of A, the negative of B and the positive of C.

[0010] Furthermore, the first pre-charging resistor and the second pre-charging resistor are both 200W100RJ.

[0011] Furthermore, the first pre-charging relay K1 and the second pre-charging relay K3 are both 20A / 750V.

[0012] Furthermore, the first main relay K2 and the second main relay K4 are both 150A / 750V.

[0013] Furthermore, the first high-voltage fuse is 250V / 750V, the second high-voltage fuse is 200A / 750V, and the third high-voltage fuse is 40V / 750V.

[0014] The utility model has the following beneficial effects: the utility model has an integrated new energy CAN communication upper-mounted high-voltage distribution box. When the whole vehicle is powered on, the upper-mounted VCU detects the ETO switch signal (the upper-mounted high-voltage switch in the cab), and the upper-mounted VCU sends a CAN message requesting the chassis to output high voltage to the upper-mounted high-voltage box (that is, high voltage is obtained at HV+). The upper-mounted VCU starts to issue a pre-charging closing instruction to control the first pre-charging relay K1 and the second pre-charging relay K3. It is detected that the voltage of HV1+ and HV2+ reaches 95% of HV+, that is, the pre-charging is successful. The upper-mounted VCU issues a main positive relay closing instruction (the first main relay K2 and the second main relay K4), and the A upper-mounted, B upper-mounted, and C upper-mounted ports output high voltage to each upper-mounted controller. If a certain upper-mounted fails, the upper-mounted VCU will issue an instruction to disconnect the corresponding main positive relay, thereby realizing the function of protecting the motor. Description of the drawings:

[0015] Figure 1 This is a schematic diagram of the integrated new energy CAN communication high-voltage distribution box of the utility model. Specific implementation method:

[0016] The utility model is further described below in conjunction with the accompanying drawings.

[0017] The utility model integrated new energy CAN communication upper mounted high voltage distribution box comprises a box body and a plurality of electrical component installation slots arranged on the upper surface of the box body, wherein the electrical components corresponding to the electrical component installation slots are arranged in the electrical component installation slots. A plurality of high voltage connection cable outlets are arranged on the side of the box body, wherein the high voltage connection cable outlets are provided with high voltage connection cables corresponding to the high voltage connection cable outlets one by one, and the high voltage connection cables are electrically connected to the electrical components.

[0018] The first pre-charging relay K1, the first main relay K2, the second pre-charging relay K3, the second main relay K4, the first high-voltage fuse 4, the second high-voltage fuse 11 and the third high-voltage fuse 12 are installed in the electrical component installation groove, and the battery positive, battery negative, A top, B top, C top, the first pre-charging resistor 3 and the second pre-charging resistor 10 are installed on the side wall of the box body.

[0019] The box body is built with an HCM high-voltage control module and a low-voltage communication interface, wherein the pin J4-1V+ of the HCM high-voltage control module is connected to the pin J4-13V+ and then connected to the 24V positive. The pin J4-2V- of the HCM high-voltage control module is connected to the pin J4-14V- and then connected to the 24V negative. The pin J4-3D01H of the HCM high-voltage control module is connected to the coil foot of the first main relay K2. The pin J4-4D03H of the HCM high-voltage control module is connected to the coil foot of the first pre-charge relay K1. The pin J4-81H of the HCM high-voltage control module is connected to CANH, and the pin J4-15D02H of the HCM high-voltage control module is connected to the coil foot of the second main relay K4. The pin J4-16D04H of the HCM high-voltage control module is connected to the coil foot of the second pre-charge relay K3. The pin J4-201L of the HCM high-voltage control module is connected to CANL. Pin J4-24GND of the HCM high voltage control module is grounded, and pin J3-1HV+1 of the HCM high voltage control module is connected to the contact point between the first pre-charge relay K1 and the first main relay K2 through a wire to detect the voltage. Pins J3-13HV- and J3-16HV+ of the HCM high voltage control module are both connected to HV+ to detect the voltage value. Pin J3-19HV+2 of the HCM high voltage control module is connected to the rear end voltage of the second main relay K4.

[0020] After the battery is connected to HV+, two branches are connected in parallel with HV+1. One branch is the branch of the first pre-charging resistor 3 and the first pre-charging relay K1 in series, and the other branch is the branch of the first high-voltage fuse 4 and the first main relay K2 in series. HV+ is connected to the positive side of A. There are two branches connected in parallel between HV+ and HV+2. One branch is the branch of the second pre-charging resistor 10 and the second pre-charging relay K3 in series, and the other branch is the branch where the second main relay K4 is located. HV+2 is connected to the positive side of B after being connected in series with the second high-voltage fuse 11. HV+2 is connected to the positive side of C after being connected in series with the third high-voltage fuse 12. The negative side of the battery is connected to the negative side of A, the negative side of B, and the positive side of C.

[0021] Among them, the first pre-charging resistor 3 is selected from 200W100RJ. The first high-voltage fuse 4 is selected from 250V / 750V. The second pre-charging resistor 10 is selected from 200W100RJ. The first pre-charging relay K1 is selected from 20A / 750V. The first main relay K2 is selected from 150A / 750V. The second pre-charging relay K3 is selected from 20A / 750V. The second main relay K4 is selected from 150A / 750V. The second high-voltage fuse 11 is selected from 200A / 750V, and the third high-voltage fuse 12 is selected from 40V / 750V.

[0022] The utility model integrates the new energy CAN communication mounted high-voltage distribution box, and outputs the chassis high-voltage power supply to A mounted positive and A mounted negative through the pre-charge high-voltage circuit composed of the first pre-charge resistor 3 and the first pre-charge relay K1 of the HCM high-voltage control module and the main high-voltage circuit composed of the first high-voltage fuse 4 and the first main relay K2.

[0023] The HCM high-voltage control module can monitor the status of each relay in real time, and send the current relay status to the upper-mounted VCU through the transmission of the CAN line. The working logic is: when the HCM high-voltage control module wakes up, it first completes the self-check of the status of each relay and feeds back the information to the upper-mounted VCU. The upper-mounted VCU receives the request for high voltage, and the chassis provides high-voltage input (that is, HV+ high voltage is energized), and then sends an instruction to the HCM high-voltage control module to close the first pre-charging relay K1 and start the pre-charging action. The upper-mounted VCU compares the voltage values ​​of HV1+ and HV+. After the pre-charging is completed, the first main relay K2 is closed and the first pre-charging relay K1 is disconnected, so that the A upper-mounted device is energized.

[0024] The above is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements without departing from the principle of the present invention, and these improvements should also be regarded as within the protection scope of the present invention.

Claims

1. An integrated new energy CAN communication mounted high voltage distribution box, characterized in that: It includes a box body and a plurality of electrical component mounting grooves arranged on the upper surface of the box body, wherein the electrical component mounting grooves are provided with electrical components corresponding to the electrical component mounting grooves one by one, and the side of the box body is provided with a plurality of high-voltage connection cable outlets, wherein the high-voltage connection cable outlets are provided with high-voltage connection cables corresponding to the high-voltage connection cable outlets one by one, and the high-voltage connection cables are electrically connected to the electrical components.

2. The integrated new energy CAN communication mounted high voltage distribution box according to claim 1, characterized in that: The electrical component installation slot is provided with a first pre-charge relay K1, a first main relay K2, a second pre-charge relay K3, a second main relay K4, a first high-voltage fuse (4), a second high-voltage fuse (11) and a third high-voltage fuse (12); a battery positive, a battery negative, an A top, a B top, a C top, a first pre-charge resistor (3) and a second pre-charge resistor (10) are installed on the side wall of the box body; an HCM high-voltage control module and a low-voltage communication interface are built into the box body; a pin J4-1V+ of the HCM high-voltage control module is connected to a pin J4-13V+ and then connected to a 24V positive voltage; a pin J4-2V- of the HCM high-voltage control module is connected to a pin J4-14V- and then connected to a 24V negative voltage; a pin J4-3D01H of the HCM high-voltage control module is connected to a coil foot of the first main relay K2; a pin J4-4D03H of the HCM high-voltage control module is connected to a first pre-charge relay K3 and a second pre-charge resistor (10) are connected to a first pre-charge relay K4. The coil foot of the electrical appliance K1 is connected, the pin J4-81H of the HCM high-voltage control module is connected to CANH, the pin J4-15D02H of the HCM high-voltage control module is connected to the coil foot of the second main relay K4, the pin J4-16D04H of the HCM high-voltage control module is connected to the coil foot of the second pre-charge relay K3, the pin J4-201L of the HCM high-voltage control module is connected to CANL, the pin J4-24GND of the HCM high-voltage control module is grounded, the pin J3-1HV+1 of the HCM high-voltage control module is connected to the contact point between the first pre-charge relay K1 and the first main relay K2 through a wire to detect the voltage, the pin J3-13HV- and the pin J3-16HV+ of the HCM high-voltage control module are both connected to HV+ to detect the voltage value, and the pin J3-19HV+2 of the HCM high-voltage control module is connected to the rear end voltage of the second main relay K4.

3. The integrated new energy CAN communication mounted high voltage distribution box as claimed in claim 2, characterized in that: After the battery is positively connected to HV+, two branches are connected in parallel between HV+1, one branch is a branch in which the first pre-charging resistor (3) and the first pre-charging relay K1 are connected in series, and the other branch is a branch in which the first high-voltage fuse (4) and the first main relay K2 are connected in series. HV+ is connected to the positive side of A.

4. The integrated new energy CAN communication mounted high voltage distribution box as claimed in claim 3, characterized in that: There are two branches connected in parallel between HV+ and HV+2, one branch is a branch where the second pre-charging resistor (10) and the second pre-charging relay K3 are connected in series, and the other branch is a branch where the second main relay K4 is located.

5. The integrated new energy CAN communication mounted high voltage distribution box as claimed in claim 4, characterized in that: HV+2 is connected in series with a second high-voltage fuse (11) and then connected to the positive position of B.

6. The integrated new energy CAN communication mounted high voltage distribution box as claimed in claim 5, characterized in that: HV+2 is connected in series with a third high-voltage fuse (12) and then connected to the C upper mount, and the battery negative is connected to the A upper mount negative, the B upper mount negative and the C upper mount positive.

7. The integrated new energy CAN communication mounted high voltage distribution box as claimed in claim 6, characterized in that: The first pre-charging resistor (3) and the second pre-charging resistor (10) are both 200W100RJ.

8. The integrated new energy CAN communication mounted high voltage distribution box as claimed in claim 7, characterized in that: The first pre-charging relay K1 and the second pre-charging relay K3 are both 20A / 750V.

9. The integrated new energy CAN communication mounted high voltage distribution box as claimed in claim 8, characterized in that: The first main relay K2 and the second main relay K4 are both 150A / 750V.

10. The integrated new energy CAN communication mounted high voltage distribution box according to claim 9, characterized in that: The first high-voltage fuse (4) is selected from 250V / 750V, the second high-voltage fuse (11) is selected from 200A / 750V, and the third high-voltage fuse (12) is selected from 40V / 750V.

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