New energy automobile junction box

Abstract

The utility model discloses a new energy automobile junction box, which relates to the technical field of new energy automobile junction boxes, and comprises a junction box main body and an upper cover, the junction box main body is sealed and covered by the upper cover, two sides of the junction box main body are respectively provided with a plurality of high-voltage transmission ends and low-voltage transmission ends, and short circuit inductors are arranged near the low-voltage transmission ends. And the other side surface of the junction box main body is provided with a safety opening, and the position of the safety opening corresponds to the position of the high-voltage safety. According to the utility model, the whole junction box is sealed in a manner that the buckle arranged at the bottom of the upper cover is adaptively inserted and fixed with the slot arranged in the junction box main body, and the gear can be driven to rotate clockwise and anticlockwise in an inserting and opening manner, so that the connecting rod I is driven to move up and down, and the positive plate and the negative plate are contacted and separated; and when the upper cover is opened and the junction box main body needs to be overhauled, the interior of the junction box is in a power-off transition state, so that the operation is safer.

Description

Technical Field

[0001] This utility model relates to the field of junction box technology for new energy vehicles, specifically a junction box for new energy vehicles. Background Technology

[0002] Electric vehicles and new energy vehicles have covered most of the domestic market. With the continuous growth in demand, the battery technology of new energy vehicles has been put to unprecedented tests. Longer battery range, more stable power supply, and continuously increasing speed are required, which poses new challenges to the battery and junction box connection technology. The junction box of new energy vehicles is often composed of high-voltage and low-voltage transmission ends. The pre-charging of high-voltage resistors and low-voltage resistors are used in combination to better stabilize the battery life.

[0003] Currently, the junction boxes of new energy vehicles still require manual operation for maintenance, and the power disconnection and insulation treatment of the maintenance environment are not yet perfect. For example, a junction box for new energy vehicles disclosed in CN221408354U includes a base, with two terminals for connecting wires symmetrically installed on both sides of the interior of the base, and nuts installed on the terminals; a top cover is snapped onto the top of the base, and a fixing groove is opened on one side of the base, with a fixing bracket snapped into the inside of the fixing groove; by installing the wire harness terminals and sealing plugs on the terminals and tightening the nuts, covering with the sealing top cover, and inserting it into the fixing bracket, the overall installation work can be completed quickly. This device is easy to install, has low operating costs, simple structure, and is firmly installed and not easy to loosen. However, the junction box in this solution cannot achieve automatic power disconnection during maintenance. When the top cover is opened, the interior of the junction box cannot guarantee a completely power-off and insulation environment.

[0004] Therefore, in response to the above problems, the applicant needs to design a junction box for new energy vehicles to solve the problem. Utility Model Content

[0005] The purpose of this utility model is to provide a junction box for new energy vehicles to solve the problem mentioned in the background art that when the top cover is opened during maintenance of the junction box body, the power cannot be automatically cut off and insulation cannot be handled.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a junction box for new energy vehicles, comprising a junction box body and a top cover, wherein the junction box body is sealed and covered by the top cover, and multiple high-voltage transmission ends and low-voltage transmission ends are respectively arranged on both sides of the junction box body, a short-circuit sensor is arranged near the low-voltage transmission end, a fuse opening is provided on the other side of the junction box body, the position of the fuse opening corresponds to the high-voltage fuse position, a heat dissipation vent is provided on the side of the junction box body opposite to the fuse opening, and the bottom of the top cover is inserted and fixed to the junction box body by a buckle.

[0007] Furthermore, each of the multiple high-voltage transmission terminals has a corresponding connection to a terminal, and each terminal is provided with a positive electrode and a negative electrode. When the positive electrode and the negative electrode are in contact, the circuit is energized, and the positive electrode and the negative electrode are not in contact initially.

[0008] Furthermore, a lower fixing member is connected to the bottom of the negative electrode plate, and an upper fixing member is connected to the positive electrode plate. The upper fixing member is sleeved on the terminal and the positive electrode plate.

[0009] Furthermore, a connecting rod is fixedly connected to the lower fixing member, and the connecting rod is connected to the junction box body through a telescopic rod.

[0010] Furthermore, the first connecting rod is U-shaped, and the first connecting rod is connected to a gear through teeth, and the gear is rotatably connected inside the switch box.

[0011] Furthermore, the top surface of the switch box is provided with a slot, the size of which is adapted to the size of the buckle, and the side of the buckle corresponding to the gear is also provided with teeth.

[0012] Furthermore, the gear is also connected to a second connecting rod, the end of which is connected to a sector plate. A fixing ring is installed on the sector plate, and the fixing ring is fixed to the end of the insulating paper wound on the insulating paper shaft. A self-resetting shaft is provided inside the insulating paper shaft, and both ends of the self-resetting shaft are fixed inside the junction box body. The width of the insulating paper shaft is adapted to the width of the safety port.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This invention seals the entire junction box by inserting a buckle at the bottom of the top cover into a slot inside the junction box body. The insertion and opening mechanism also drives the gear to rotate clockwise and counterclockwise, causing the connecting rod to move up and down, contacting and separating the positive and negative electrodes to achieve power on / off. When the top cover is opened for maintenance, the junction box is in a de-energized state, making operation safer.

[0015] The clockwise and counterclockwise rotation of the slot within the card slot drives the second connecting rod to rotate, causing the sector plate to swing and pull out the insulating paper, thus covering the entire fuse opening. When the top cover is opened and maintenance is required inside the junction box, insulation is also applied to the area near the high-voltage fuse, improving safety during maintenance. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0017] Figure 2 This is a three-dimensional structural diagram of the short-circuit sensor of this utility model;

[0018] Figure 3 This is an exploded perspective view of the junction box body of this utility model.

[0019] Figure 4 This is a three-dimensional structural diagram of the high-voltage fuse of this utility model;

[0020] Figure 5 This is a schematic diagram of the connection structure of the sector plate of this utility model;

[0021] Figure 6 This is a three-dimensional exploded view of the upper fixing component of this utility model.

[0022] In the diagram: 1. Junction box body; 101. High-voltage fuse; 2. Top cover; 201. Buckle; 3. Low-voltage transmission end; 4. Short-circuit sensor; 5. Fuse port; 6. High-voltage transmission end; 7. Wiring terminal; 701. Positive electrode plate; 702. Negative electrode plate; 8. Upper fixing part; 9. Lower fixing part; 10. Connecting rod one; 11. Telescopic rod; 12. Gear; 13. Switch box; 1301. Slot; 14. Connecting rod two; 15. Sector plate; 16. Fixing ring; 17. Insulating paper shaft. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figures 1-5 As shown, this utility model discloses a junction box for a new energy vehicle, comprising a junction box body 1 and a top cover 2. The junction box body 1 is sealed and covered by the top cover 2. Multiple high-voltage transmission terminals 6 and low-voltage transmission terminals 3 are respectively arranged on both sides of the junction box body 1. A short-circuit sensor 4 is arranged near the low-voltage transmission terminals 3. A fuse slot 5 is provided on the other side of the junction box body 1, and the position of the fuse slot 5 corresponds to the position of the high-voltage fuse 101. A heat dissipation vent is provided on the side of the junction box body 1 opposite to the fuse slot 5. The bottom of the top cover 2 is open to... The buckle 201 is inserted and fixed to the junction box body 1. Multiple high-voltage transmission ends 6 are connected to multiple terminals 7. Each terminal 7 is provided with a positive electrode 701 and a negative electrode 702. When the positive electrode 701 and the negative electrode 702 are in contact, they are energized. Initially, the positive electrode 701 and the negative electrode 702 are not in contact. The bottom of the negative electrode 702 is connected to a lower fixing member 9, and the positive electrode 701 is connected to an upper fixing member 8. The upper fixing member 8 is sleeved on the terminal 7 and the positive electrode 701.

[0025] When the positive electrode 701 and the negative electrode 702 are in contact, the power is turned on; when the positive electrode 701 and the negative electrode 702 are separated, the power is turned off. The power-on and power-off effects are achieved by the up-and-down lifting movement of the lower fixing member 9.

[0026] A connecting rod 10 is fixedly connected to the lower fixing member 9. The connecting rod 10 is connected to the junction box body 1 through the telescopic rod 11. The connecting rod 10 is U-shaped and is connected to the gear 12 through teeth. The gear 12 is rotatably connected to the switch box 13. A slot 1301 is provided on the top surface of the switch box 13. The size of the slot 1301 is adapted to the size of the buckle 201, and the buckle 201 is also provided with teeth on the side corresponding to the gear 12.

[0027] When the top cover 2 is opened, the gear 12 rotates clockwise, causing the connecting rod 10 to move downwards. When the top cover 2 is pressed inwards to close the junction box body 1, the gear 12 rotates counterclockwise, and the connecting rod 10 is lifted upwards.

[0028] The gear 12 is also connected to a connecting rod 14. The end of the connecting rod 14 is connected to a sector plate 15. A fixing ring 16 is installed on the sector plate 15. The fixing ring 16 is fixed to the end of the insulating paper wound on the insulating paper shaft 17. A self-resetting shaft is provided inside the insulating paper shaft 17. Both ends of the self-resetting shaft are fixed inside the junction box body 1. The width of the insulating paper shaft 17 is adapted to the width of the safety port 5.

[0029] When gear 12 rotates counterclockwise, it will also drive the second connecting rod 14 to rotate, causing the sector plate 15 to swing, pulling the insulating paper on the insulating paper shaft 17 apart and sealing the safety port 5.

[0030] Working principle: First, install various transformers, relays, resistors, etc. in the junction box body 1 and connect them electrically. Then, the electrical connections on multiple high-voltage transmission terminals 6 can be connected to multiple terminals 7 respectively, and finally concentrated on the positive electrode 701 and negative electrode 702 in the terminal 7.

[0031] The power-off effect is achieved by the contact and separation of the positive electrode 701 and the negative electrode 702. When the upper cover 2 is closed on the junction box body 1, the buckle 201 extends into the slot 1301, driving the gear 12 to rotate counterclockwise, causing the telescopic rod 11 to be slightly lifted up, lifting the lower fixing part 9 up, and the originally separated positive electrode 701 and negative electrode 702 are put together, and the junction box body 1 begins to be used normally after the multiple high voltage transmission terminals 6 are energized.

[0032] When the junction box body 1 needs maintenance, the top cover 2 needs to be opened. Then the gear 12 will rotate clockwise and the connecting rod 10 will move downward, loosening the originally attached positive electrode 701 and negative electrode 702, thus achieving the effect of power disconnection.

[0033] At the same time, the clockwise rotation of gear 12 will drive the rotation of connecting rod 14, causing the sector plate 15 to swing, pulling open the insulating paper on the originally retracted insulating paper shaft 17, blocking the fuse port 5, and improving the insulation effect of the high voltage fuse 101 when it is de-energized.

[0034] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A junction box for a new energy vehicle, comprising a junction box body (1) and a top cover (2), characterized in that: The junction box body (1) is sealed and covered by the top cover (2). Multiple high-voltage transmission ends (6) and low-voltage transmission ends (3) are respectively provided on both sides of the junction box body (1). A short-circuit sensor (4) is provided near the low-voltage transmission end (3). A fuse port (5) is provided on the other side of the junction box body (1). The position of the fuse port (5) corresponds to the position of the high-voltage fuse (101). A heat dissipation vent is provided on the side of the junction box body (1) opposite to the fuse port (5). The bottom of the top cover (2) is inserted and fixed to the junction box body (1) by a buckle (201).

2. A junction box for a new energy vehicle according to claim 1, characterized in that: The multiple high-voltage transmission terminals (6) are connected to multiple terminals (7). Each terminal (7) is provided with a positive electrode (701) and a negative electrode (702). When the positive electrode (701) and the negative electrode (702) are in contact, they are energized. Initially, the positive electrode (701) and the negative electrode (702) are not in contact.

3. A junction box for a new energy vehicle according to claim 2, characterized in that: The bottom of the negative electrode (702) is connected to a lower fixing member (9), and the positive electrode (701) is connected to an upper fixing member (8). The upper fixing member (8) is sleeved on the terminal (7) and the positive electrode (701).

4. A junction box for a new energy vehicle according to claim 3, characterized in that: The lower fixing member (9) is fixedly connected to a connecting rod (10), which is connected to the junction box body (1) through a telescopic rod (11).

5. A junction box for a new energy vehicle according to claim 4, characterized in that: The first connecting rod (10) is U-shaped, and the first connecting rod (10) is connected to a gear (12) through tooth meshing. The outer side of the gear (12) is rotatably connected to a switch box (13).

6. A junction box for a new energy vehicle according to claim 5, characterized in that: The top surface of the switch box (13) is provided with a slot (1301), the size of the slot (1301) is adapted to the size of the buckle (201), and the buckle (201) is also provided with teeth on the side corresponding to the gear (12).

7. A junction box for a new energy vehicle according to claim 6, characterized in that: The gear (12) is also connected to a connecting rod two (14), and the end of the connecting rod two (14) is connected to a sector plate (15). A fixing ring (16) is installed on the sector plate (15). The fixing ring (16) is fixed to the end of the insulating paper wound on the insulating paper shaft (17). A self-resetting shaft is provided inside the insulating paper shaft (17). Both ends of the self-resetting shaft are fixed inside the junction box body (1). The width of the insulating paper shaft (17) is adapted to the width of the safety port (5).

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